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-rw-r--r--mk/rootfs.mk1
-rw-r--r--target/config/Config.in.rootfs10
-rw-r--r--target/linux/config/Config.in.debug1
-rw-r--r--target/linux/config/Config.in.fs21
-rw-r--r--target/linux/patches/3.10.104/yaffs2.patch16547
-rw-r--r--target/linux/patches/3.12.69/yaffs2.patch16547
-rw-r--r--target/linux/patches/3.18.44/yaffs2.patch16559
-rw-r--r--target/linux/patches/3.4.113/yaffs2.patch16550
-rw-r--r--target/mips/Makefile10
-rw-r--r--target/mips64/Makefile7
10 files changed, 0 insertions, 66253 deletions
diff --git a/mk/rootfs.mk b/mk/rootfs.mk
index 154896036..d4d2e0f04 100644
--- a/mk/rootfs.mk
+++ b/mk/rootfs.mk
@@ -57,7 +57,6 @@ $(eval $(call rootfs_template,initramfs,INITRAMFS,rootfstype=tmpfs))
$(eval $(call rootfs_template,initramfspiggyback,INITRAMFSPIGGYBACK,rootfstype=tmpfs))
$(eval $(call rootfs_template,initramfsarchive,INITRAMFSARCHIVE,rootfstype=tmpfs))
$(eval $(call rootfs_template,squashfs,SQUASHFS,$(MTDDEV) rootfstype=squashfs))
-$(eval $(call rootfs_template,yaffs,YAFFS,$(MTDDEV)))
$(eval $(call rootfs_template,ubifs,UBIFS,ubi.mtd=1 root=ubi0:rootfs rootfstype=ubifs))
$(eval $(call rootfs_template,jffs2,JFFS2,$(MTDDEV) rootfstype=jffs2))
$(eval $(call rootfs_template,nfsroot,NFSROOT,root=/dev/nfs ip=dhcp))
diff --git a/target/config/Config.in.rootfs b/target/config/Config.in.rootfs
index 335a4547f..920cd75e3 100644
--- a/target/config/Config.in.rootfs
+++ b/target/config/Config.in.rootfs
@@ -77,16 +77,6 @@ config ADK_TARGET_ROOTFS_JFFS2
help
compressed read-write filesystem for MTD flash systems.
-config ADK_TARGET_ROOTFS_YAFFS
- bool "YAFFS2 root filesystem (NAND)"
- select ADK_KERNEL_MISC_FILESYSTEMS
- select ADK_KERNEL_YAFFS_FS
- select ADK_KERNEL_YAFFS_YAFFS2
- select ADK_KERNEL_YAFFS_AUTO_YAFFS2
- depends on ADK_TARGET_WITH_NAND
- help
- Root filesystem on NAND flash with YAFFS2.
-
config ADK_TARGET_ROOTFS_UBIFS
bool "UBIFS root filesystem (NAND)"
select ADK_KERNEL_UBIFS_FS
diff --git a/target/linux/config/Config.in.debug b/target/linux/config/Config.in.debug
index f68efc97a..9c2d6701b 100644
--- a/target/linux/config/Config.in.debug
+++ b/target/linux/config/Config.in.debug
@@ -109,7 +109,6 @@ config ADK_KERNEL_DEBUG_WITH_KGDB
select ADK_KERNEL_FRAME_POINTER
depends on ADK_TARGET_ROOTFS_NFSROOT || \
ADK_TARGET_ROOTFS_ARCHIVE || \
- ADK_TARGET_ROOTFS_YAFFS || \
ADK_TARGET_ROOTFS_INITRAMFS || \
ADK_TARGET_ROOTFS_INITRAMFS_PIGGYBACK
default n
diff --git a/target/linux/config/Config.in.fs b/target/linux/config/Config.in.fs
index b6226fc19..36422c1e9 100644
--- a/target/linux/config/Config.in.fs
+++ b/target/linux/config/Config.in.fs
@@ -39,15 +39,6 @@ config ADK_KERNEL_JBD2
select ADK_KERNEL_CRYPTO
select ADK_KERNEL_CRYPTO_CRC32C
-config ADK_KERNEL_YAFFS_YAFFS1
- bool
-
-config ADK_KERNEL_YAFFS_YAFFS2
- bool
-
-config ADK_KERNEL_YAFFS_AUTO_YAFFS2
- bool
-
config ADK_KERNEL_EXT3_FS_XATTR
bool
@@ -254,18 +245,6 @@ config ADK_KERNEL_SQUASHFS
help
Squashfs compressed read-only filesystem
-config ADK_KERNEL_YAFFS_FS
- tristate "YAFFS2 filesystem"
- select ADK_KERNEL_MISC_FILESYSTEMS
- select ADK_KERNEL_MTD
- select ADK_KERNEL_MTD_BLOCK
- select ADK_KERNEL_YAFFS_YAFFS1
- select ADK_KERNEL_YAFFS_YAFFS2
- select ADK_KERNEL_YAFFS_AUTO_YAFFS2
- depends on ADK_TARGET_WITH_NAND
- help
- YAFFS2 filesystem for NAND devices
-
config ADK_KERNEL_MTD_UBI_GLUEBI
bool
diff --git a/target/linux/patches/3.10.104/yaffs2.patch b/target/linux/patches/3.10.104/yaffs2.patch
deleted file mode 100644
index 172629530..000000000
--- a/target/linux/patches/3.10.104/yaffs2.patch
+++ /dev/null
@@ -1,16547 +0,0 @@
-diff -Nur linux-3.10.40.orig/fs/Kconfig linux-3.10.40/fs/Kconfig
---- linux-3.10.40.orig/fs/Kconfig 2014-05-13 14:00:04.000000000 +0200
-+++ linux-3.10.40/fs/Kconfig 2014-05-17 12:48:10.000000000 +0200
-@@ -193,6 +193,7 @@
- source "fs/befs/Kconfig"
- source "fs/bfs/Kconfig"
- source "fs/efs/Kconfig"
-+source "fs/yaffs2/Kconfig"
- source "fs/jffs2/Kconfig"
- # UBIFS File system configuration
- source "fs/ubifs/Kconfig"
-diff -Nur linux-3.10.40.orig/fs/Makefile linux-3.10.40/fs/Makefile
---- linux-3.10.40.orig/fs/Makefile 2014-05-13 14:00:04.000000000 +0200
-+++ linux-3.10.40/fs/Makefile 2014-05-17 12:48:10.000000000 +0200
-@@ -126,3 +126,4 @@
- obj-$(CONFIG_CEPH_FS) += ceph/
- obj-$(CONFIG_PSTORE) += pstore/
- obj-$(CONFIG_EFIVAR_FS) += efivarfs/
-+obj-$(CONFIG_YAFFS_FS) += yaffs2/
-diff -Nur linux-3.10.40.orig/fs/yaffs2/Kconfig linux-3.10.40/fs/yaffs2/Kconfig
---- linux-3.10.40.orig/fs/yaffs2/Kconfig 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/Kconfig 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,171 @@
-+#
-+# yaffs file system configurations
-+#
-+
-+config YAFFS_FS
-+ tristate "yaffs2 file system support"
-+ default n
-+ depends on MTD_BLOCK
-+ select YAFFS_YAFFS1
-+ select YAFFS_YAFFS2
-+ help
-+ yaffs2, or Yet Another Flash File System, is a file system
-+ optimised for NAND Flash chips.
-+
-+ To compile the yaffs2 file system support as a module, choose M
-+ here: the module will be called yaffs2.
-+
-+ If unsure, say N.
-+
-+ Further information on yaffs2 is available at
-+ <http://www.aleph1.co.uk/yaffs/>.
-+
-+config YAFFS_YAFFS1
-+ bool "512 byte / page devices"
-+ depends on YAFFS_FS
-+ default y
-+ help
-+ Enable yaffs1 support -- yaffs for 512 byte / page devices
-+
-+ Not needed for 2K-page devices.
-+
-+ If unsure, say Y.
-+
-+config YAFFS_9BYTE_TAGS
-+ bool "Use older-style on-NAND data format with pageStatus byte"
-+ depends on YAFFS_YAFFS1
-+ default n
-+ help
-+
-+ Older-style on-NAND data format has a "pageStatus" byte to record
-+ chunk/page state. This byte is zero when the page is discarded.
-+ Choose this option if you have existing on-NAND data using this
-+ format that you need to continue to support. New data written
-+ also uses the older-style format. Note: Use of this option
-+ generally requires that MTD's oob layout be adjusted to use the
-+ older-style format. See notes on tags formats and MTD versions
-+ in yaffs_mtdif1.c.
-+
-+ If unsure, say N.
-+
-+config YAFFS_DOES_ECC
-+ bool "Lets yaffs do its own ECC"
-+ depends on YAFFS_FS && YAFFS_YAFFS1 && !YAFFS_9BYTE_TAGS
-+ default n
-+ help
-+ This enables yaffs to use its own ECC functions instead of using
-+ the ones from the generic MTD-NAND driver.
-+
-+ If unsure, say N.
-+
-+config YAFFS_ECC_WRONG_ORDER
-+ bool "Use the same ecc byte order as Steven Hill's nand_ecc.c"
-+ depends on YAFFS_FS && YAFFS_DOES_ECC && !YAFFS_9BYTE_TAGS
-+ default n
-+ help
-+ This makes yaffs_ecc.c use the same ecc byte order as Steven
-+ Hill's nand_ecc.c. If not set, then you get the same ecc byte
-+ order as SmartMedia.
-+
-+ If unsure, say N.
-+
-+config YAFFS_YAFFS2
-+ bool "2048 byte (or larger) / page devices"
-+ depends on YAFFS_FS
-+ default y
-+ help
-+ Enable yaffs2 support -- yaffs for >= 2K bytes per page devices
-+
-+ If unsure, say Y.
-+
-+config YAFFS_AUTO_YAFFS2
-+ bool "Autoselect yaffs2 format"
-+ depends on YAFFS_YAFFS2
-+ default y
-+ help
-+ Without this, you need to explicitely use yaffs2 as the file
-+ system type. With this, you can say "yaffs" and yaffs or yaffs2
-+ will be used depending on the device page size (yaffs on
-+ 512-byte page devices, yaffs2 on 2K page devices).
-+
-+ If unsure, say Y.
-+
-+config YAFFS_DISABLE_TAGS_ECC
-+ bool "Disable yaffs from doing ECC on tags by default"
-+ depends on YAFFS_FS && YAFFS_YAFFS2
-+ default n
-+ help
-+ This defaults yaffs to using its own ECC calculations on tags instead of
-+ just relying on the MTD.
-+ This behavior can also be overridden with tags_ecc_on and
-+ tags_ecc_off mount options.
-+
-+ If unsure, say N.
-+
-+config YAFFS_ALWAYS_CHECK_CHUNK_ERASED
-+ bool "Force chunk erase check"
-+ depends on YAFFS_FS
-+ default n
-+ help
-+ Normally yaffs only checks chunks before writing until an erased
-+ chunk is found. This helps to detect any partially written
-+ chunks that might have happened due to power loss.
-+
-+ Enabling this forces on the test that chunks are erased in flash
-+ before writing to them. This takes more time but is potentially
-+ a bit more secure.
-+
-+ Suggest setting Y during development and ironing out driver
-+ issues etc. Suggest setting to N if you want faster writing.
-+
-+ If unsure, say Y.
-+
-+config YAFFS_EMPTY_LOST_AND_FOUND
-+ bool "Empty lost and found on boot"
-+ depends on YAFFS_FS
-+ default n
-+ help
-+ If this is enabled then the contents of lost and found is
-+ automatically dumped at mount.
-+
-+ If unsure, say N.
-+
-+config YAFFS_DISABLE_BLOCK_REFRESHING
-+ bool "Disable yaffs2 block refreshing"
-+ depends on YAFFS_FS
-+ default n
-+ help
-+ If this is set, then block refreshing is disabled.
-+ Block refreshing infrequently refreshes the oldest block in
-+ a yaffs2 file system. This mechanism helps to refresh flash to
-+ mitigate against data loss. This is particularly useful for MLC.
-+
-+ If unsure, say N.
-+
-+config YAFFS_DISABLE_BACKGROUND
-+ bool "Disable yaffs2 background processing"
-+ depends on YAFFS_FS
-+ default n
-+ help
-+ If this is set, then background processing is disabled.
-+ Background processing makes many foreground activities faster.
-+
-+ If unsure, say N.
-+
-+config YAFFS_DISABLE_BAD_BLOCK_MARKING
-+ bool "Disable yaffs2 bad block marking"
-+ depends on YAFFS_FS
-+ default n
-+ help
-+ Useful during early flash bring up to prevent problems causing
-+ lots of bad block marking.
-+
-+ If unsure, say N.
-+
-+config YAFFS_XATTR
-+ bool "Enable yaffs2 xattr support"
-+ depends on YAFFS_FS
-+ default y
-+ help
-+ If this is set then yaffs2 will provide xattr support.
-+ If unsure, say Y.
-diff -Nur linux-3.10.40.orig/fs/yaffs2/Makefile linux-3.10.40/fs/yaffs2/Makefile
---- linux-3.10.40.orig/fs/yaffs2/Makefile 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/Makefile 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,18 @@
-+#
-+# Makefile for the linux YAFFS filesystem routines.
-+#
-+
-+obj-$(CONFIG_YAFFS_FS) += yaffs.o
-+
-+yaffs-y := yaffs_ecc.o yaffs_vfs.o yaffs_guts.o yaffs_checkptrw.o
-+yaffs-y += yaffs_packedtags1.o yaffs_packedtags2.o yaffs_nand.o
-+yaffs-y += yaffs_tagscompat.o yaffs_tagsmarshall.o
-+yaffs-y += yaffs_mtdif.o
-+yaffs-y += yaffs_nameval.o yaffs_attribs.o
-+yaffs-y += yaffs_allocator.o
-+yaffs-y += yaffs_yaffs1.o
-+yaffs-y += yaffs_yaffs2.o
-+yaffs-y += yaffs_bitmap.o
-+yaffs-y += yaffs_summary.o
-+yaffs-y += yaffs_verify.o
-+
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_allocator.c linux-3.10.40/fs/yaffs2/yaffs_allocator.c
---- linux-3.10.40.orig/fs/yaffs2/yaffs_allocator.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_allocator.c 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,357 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_allocator.h"
-+#include "yaffs_guts.h"
-+#include "yaffs_trace.h"
-+#include "yportenv.h"
-+
-+/*
-+ * Each entry in yaffs_tnode_list and yaffs_obj_list hold blocks
-+ * of approx 100 objects that are themn allocated singly.
-+ * This is basically a simplified slab allocator.
-+ *
-+ * We don't use the Linux slab allocator because slab does not allow
-+ * us to dump all the objects in one hit when we do a umount and tear
-+ * down all the tnodes and objects. slab requires that we first free
-+ * the individual objects.
-+ *
-+ * Once yaffs has been mainlined I shall try to motivate for a change
-+ * to slab to provide the extra features we need here.
-+ */
-+
-+struct yaffs_tnode_list {
-+ struct yaffs_tnode_list *next;
-+ struct yaffs_tnode *tnodes;
-+};
-+
-+struct yaffs_obj_list {
-+ struct yaffs_obj_list *next;
-+ struct yaffs_obj *objects;
-+};
-+
-+struct yaffs_allocator {
-+ int n_tnodes_created;
-+ struct yaffs_tnode *free_tnodes;
-+ int n_free_tnodes;
-+ struct yaffs_tnode_list *alloc_tnode_list;
-+
-+ int n_obj_created;
-+ struct list_head free_objs;
-+ int n_free_objects;
-+
-+ struct yaffs_obj_list *allocated_obj_list;
-+};
-+
-+static void yaffs_deinit_raw_tnodes(struct yaffs_dev *dev)
-+{
-+ struct yaffs_allocator *allocator =
-+ (struct yaffs_allocator *)dev->allocator;
-+ struct yaffs_tnode_list *tmp;
-+
-+ if (!allocator) {
-+ BUG();
-+ return;
-+ }
-+
-+ while (allocator->alloc_tnode_list) {
-+ tmp = allocator->alloc_tnode_list->next;
-+
-+ kfree(allocator->alloc_tnode_list->tnodes);
-+ kfree(allocator->alloc_tnode_list);
-+ allocator->alloc_tnode_list = tmp;
-+ }
-+
-+ allocator->free_tnodes = NULL;
-+ allocator->n_free_tnodes = 0;
-+ allocator->n_tnodes_created = 0;
-+}
-+
-+static void yaffs_init_raw_tnodes(struct yaffs_dev *dev)
-+{
-+ struct yaffs_allocator *allocator = dev->allocator;
-+
-+ if (!allocator) {
-+ BUG();
-+ return;
-+ }
-+
-+ allocator->alloc_tnode_list = NULL;
-+ allocator->free_tnodes = NULL;
-+ allocator->n_free_tnodes = 0;
-+ allocator->n_tnodes_created = 0;
-+}
-+
-+static int yaffs_create_tnodes(struct yaffs_dev *dev, int n_tnodes)
-+{
-+ struct yaffs_allocator *allocator =
-+ (struct yaffs_allocator *)dev->allocator;
-+ int i;
-+ struct yaffs_tnode *new_tnodes;
-+ u8 *mem;
-+ struct yaffs_tnode *curr;
-+ struct yaffs_tnode *next;
-+ struct yaffs_tnode_list *tnl;
-+
-+ if (!allocator) {
-+ BUG();
-+ return YAFFS_FAIL;
-+ }
-+
-+ if (n_tnodes < 1)
-+ return YAFFS_OK;
-+
-+ /* make these things */
-+ new_tnodes = kmalloc(n_tnodes * dev->tnode_size, GFP_NOFS);
-+ mem = (u8 *) new_tnodes;
-+
-+ if (!new_tnodes) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs: Could not allocate Tnodes");
-+ return YAFFS_FAIL;
-+ }
-+
-+ /* New hookup for wide tnodes */
-+ for (i = 0; i < n_tnodes - 1; i++) {
-+ curr = (struct yaffs_tnode *)&mem[i * dev->tnode_size];
-+ next = (struct yaffs_tnode *)&mem[(i + 1) * dev->tnode_size];
-+ curr->internal[0] = next;
-+ }
-+
-+ curr = (struct yaffs_tnode *)&mem[(n_tnodes - 1) * dev->tnode_size];
-+ curr->internal[0] = allocator->free_tnodes;
-+ allocator->free_tnodes = (struct yaffs_tnode *)mem;
-+
-+ allocator->n_free_tnodes += n_tnodes;
-+ allocator->n_tnodes_created += n_tnodes;
-+
-+ /* Now add this bunch of tnodes to a list for freeing up.
-+ * NB If we can't add this to the management list it isn't fatal
-+ * but it just means we can't free this bunch of tnodes later.
-+ */
-+ tnl = kmalloc(sizeof(struct yaffs_tnode_list), GFP_NOFS);
-+ if (!tnl) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "Could not add tnodes to management list");
-+ return YAFFS_FAIL;
-+ } else {
-+ tnl->tnodes = new_tnodes;
-+ tnl->next = allocator->alloc_tnode_list;
-+ allocator->alloc_tnode_list = tnl;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_ALLOCATE, "Tnodes added");
-+
-+ return YAFFS_OK;
-+}
-+
-+struct yaffs_tnode *yaffs_alloc_raw_tnode(struct yaffs_dev *dev)
-+{
-+ struct yaffs_allocator *allocator =
-+ (struct yaffs_allocator *)dev->allocator;
-+ struct yaffs_tnode *tn = NULL;
-+
-+ if (!allocator) {
-+ BUG();
-+ return NULL;
-+ }
-+
-+ /* If there are none left make more */
-+ if (!allocator->free_tnodes)
-+ yaffs_create_tnodes(dev, YAFFS_ALLOCATION_NTNODES);
-+
-+ if (allocator->free_tnodes) {
-+ tn = allocator->free_tnodes;
-+ allocator->free_tnodes = allocator->free_tnodes->internal[0];
-+ allocator->n_free_tnodes--;
-+ }
-+
-+ return tn;
-+}
-+
-+/* FreeTnode frees up a tnode and puts it back on the free list */
-+void yaffs_free_raw_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn)
-+{
-+ struct yaffs_allocator *allocator = dev->allocator;
-+
-+ if (!allocator) {
-+ BUG();
-+ return;
-+ }
-+
-+ if (tn) {
-+ tn->internal[0] = allocator->free_tnodes;
-+ allocator->free_tnodes = tn;
-+ allocator->n_free_tnodes++;
-+ }
-+ dev->checkpoint_blocks_required = 0; /* force recalculation */
-+}
-+
-+/*--------------- yaffs_obj alloaction ------------------------
-+ *
-+ * Free yaffs_objs are stored in a list using obj->siblings.
-+ * The blocks of allocated objects are stored in a linked list.
-+ */
-+
-+static void yaffs_init_raw_objs(struct yaffs_dev *dev)
-+{
-+ struct yaffs_allocator *allocator = dev->allocator;
-+
-+ if (!allocator) {
-+ BUG();
-+ return;
-+ }
-+
-+ allocator->allocated_obj_list = NULL;
-+ INIT_LIST_HEAD(&allocator->free_objs);
-+ allocator->n_free_objects = 0;
-+}
-+
-+static void yaffs_deinit_raw_objs(struct yaffs_dev *dev)
-+{
-+ struct yaffs_allocator *allocator = dev->allocator;
-+ struct yaffs_obj_list *tmp;
-+
-+ if (!allocator) {
-+ BUG();
-+ return;
-+ }
-+
-+ while (allocator->allocated_obj_list) {
-+ tmp = allocator->allocated_obj_list->next;
-+ kfree(allocator->allocated_obj_list->objects);
-+ kfree(allocator->allocated_obj_list);
-+ allocator->allocated_obj_list = tmp;
-+ }
-+
-+ INIT_LIST_HEAD(&allocator->free_objs);
-+ allocator->n_free_objects = 0;
-+ allocator->n_obj_created = 0;
-+}
-+
-+static int yaffs_create_free_objs(struct yaffs_dev *dev, int n_obj)
-+{
-+ struct yaffs_allocator *allocator = dev->allocator;
-+ int i;
-+ struct yaffs_obj *new_objs;
-+ struct yaffs_obj_list *list;
-+
-+ if (!allocator) {
-+ BUG();
-+ return YAFFS_FAIL;
-+ }
-+
-+ if (n_obj < 1)
-+ return YAFFS_OK;
-+
-+ /* make these things */
-+ new_objs = kmalloc(n_obj * sizeof(struct yaffs_obj), GFP_NOFS);
-+ list = kmalloc(sizeof(struct yaffs_obj_list), GFP_NOFS);
-+
-+ if (!new_objs || !list) {
-+ kfree(new_objs);
-+ new_objs = NULL;
-+ kfree(list);
-+ list = NULL;
-+ yaffs_trace(YAFFS_TRACE_ALLOCATE,
-+ "Could not allocate more objects");
-+ return YAFFS_FAIL;
-+ }
-+
-+ /* Hook them into the free list */
-+ for (i = 0; i < n_obj; i++)
-+ list_add(&new_objs[i].siblings, &allocator->free_objs);
-+
-+ allocator->n_free_objects += n_obj;
-+ allocator->n_obj_created += n_obj;
-+
-+ /* Now add this bunch of Objects to a list for freeing up. */
-+
-+ list->objects = new_objs;
-+ list->next = allocator->allocated_obj_list;
-+ allocator->allocated_obj_list = list;
-+
-+ return YAFFS_OK;
-+}
-+
-+struct yaffs_obj *yaffs_alloc_raw_obj(struct yaffs_dev *dev)
-+{
-+ struct yaffs_obj *obj = NULL;
-+ struct list_head *lh;
-+ struct yaffs_allocator *allocator = dev->allocator;
-+
-+ if (!allocator) {
-+ BUG();
-+ return obj;
-+ }
-+
-+ /* If there are none left make more */
-+ if (list_empty(&allocator->free_objs))
-+ yaffs_create_free_objs(dev, YAFFS_ALLOCATION_NOBJECTS);
-+
-+ if (!list_empty(&allocator->free_objs)) {
-+ lh = allocator->free_objs.next;
-+ obj = list_entry(lh, struct yaffs_obj, siblings);
-+ list_del_init(lh);
-+ allocator->n_free_objects--;
-+ }
-+
-+ return obj;
-+}
-+
-+void yaffs_free_raw_obj(struct yaffs_dev *dev, struct yaffs_obj *obj)
-+{
-+
-+ struct yaffs_allocator *allocator = dev->allocator;
-+
-+ if (!allocator) {
-+ BUG();
-+ return;
-+ }
-+
-+ /* Link into the free list. */
-+ list_add(&obj->siblings, &allocator->free_objs);
-+ allocator->n_free_objects++;
-+}
-+
-+void yaffs_deinit_raw_tnodes_and_objs(struct yaffs_dev *dev)
-+{
-+
-+ if (!dev->allocator) {
-+ BUG();
-+ return;
-+ }
-+
-+ yaffs_deinit_raw_tnodes(dev);
-+ yaffs_deinit_raw_objs(dev);
-+ kfree(dev->allocator);
-+ dev->allocator = NULL;
-+}
-+
-+void yaffs_init_raw_tnodes_and_objs(struct yaffs_dev *dev)
-+{
-+ struct yaffs_allocator *allocator;
-+
-+ if (dev->allocator) {
-+ BUG();
-+ return;
-+ }
-+
-+ allocator = kmalloc(sizeof(struct yaffs_allocator), GFP_NOFS);
-+ if (allocator) {
-+ dev->allocator = allocator;
-+ yaffs_init_raw_tnodes(dev);
-+ yaffs_init_raw_objs(dev);
-+ }
-+}
-+
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_allocator.h linux-3.10.40/fs/yaffs2/yaffs_allocator.h
---- linux-3.10.40.orig/fs/yaffs2/yaffs_allocator.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_allocator.h 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,30 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_ALLOCATOR_H__
-+#define __YAFFS_ALLOCATOR_H__
-+
-+#include "yaffs_guts.h"
-+
-+void yaffs_init_raw_tnodes_and_objs(struct yaffs_dev *dev);
-+void yaffs_deinit_raw_tnodes_and_objs(struct yaffs_dev *dev);
-+
-+struct yaffs_tnode *yaffs_alloc_raw_tnode(struct yaffs_dev *dev);
-+void yaffs_free_raw_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn);
-+
-+struct yaffs_obj *yaffs_alloc_raw_obj(struct yaffs_dev *dev);
-+void yaffs_free_raw_obj(struct yaffs_dev *dev, struct yaffs_obj *obj);
-+
-+#endif
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_attribs.c linux-3.10.40/fs/yaffs2/yaffs_attribs.c
---- linux-3.10.40.orig/fs/yaffs2/yaffs_attribs.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_attribs.c 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,166 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_guts.h"
-+#include "yaffs_attribs.h"
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0))
-+static inline uid_t ia_uid_read(const struct iattr *iattr)
-+{
-+ return from_kuid(&init_user_ns, iattr->ia_uid);
-+}
-+
-+static inline gid_t ia_gid_read(const struct iattr *iattr)
-+{
-+ return from_kgid(&init_user_ns, iattr->ia_gid);
-+}
-+
-+static inline void ia_uid_write(struct iattr *iattr, uid_t uid)
-+{
-+ iattr->ia_uid = make_kuid(&init_user_ns, uid);
-+}
-+
-+static inline void ia_gid_write(struct iattr *iattr, gid_t gid)
-+{
-+ iattr->ia_gid = make_kgid(&init_user_ns, gid);
-+}
-+#else
-+static inline uid_t ia_uid_read(const struct iattr *iattr)
-+{
-+ return iattr->ia_uid;
-+}
-+
-+static inline gid_t ia_gid_read(const struct iattr *inode)
-+{
-+ return iattr->ia_gid;
-+}
-+
-+static inline void ia_uid_write(struct iattr *iattr, uid_t uid)
-+{
-+ iattr->ia_uid = uid;
-+}
-+
-+static inline void ia_gid_write(struct iattr *iattr, gid_t gid)
-+{
-+ iattr->ia_gid = gid;
-+}
-+#endif
-+
-+void yaffs_load_attribs(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh)
-+{
-+ obj->yst_uid = oh->yst_uid;
-+ obj->yst_gid = oh->yst_gid;
-+ obj->yst_atime = oh->yst_atime;
-+ obj->yst_mtime = oh->yst_mtime;
-+ obj->yst_ctime = oh->yst_ctime;
-+ obj->yst_rdev = oh->yst_rdev;
-+}
-+
-+void yaffs_load_attribs_oh(struct yaffs_obj_hdr *oh, struct yaffs_obj *obj)
-+{
-+ oh->yst_uid = obj->yst_uid;
-+ oh->yst_gid = obj->yst_gid;
-+ oh->yst_atime = obj->yst_atime;
-+ oh->yst_mtime = obj->yst_mtime;
-+ oh->yst_ctime = obj->yst_ctime;
-+ oh->yst_rdev = obj->yst_rdev;
-+
-+}
-+
-+void yaffs_load_current_time(struct yaffs_obj *obj, int do_a, int do_c)
-+{
-+ obj->yst_mtime = Y_CURRENT_TIME;
-+ if (do_a)
-+ obj->yst_atime = obj->yst_mtime;
-+ if (do_c)
-+ obj->yst_ctime = obj->yst_mtime;
-+}
-+
-+void yaffs_attribs_init(struct yaffs_obj *obj, u32 gid, u32 uid, u32 rdev)
-+{
-+ yaffs_load_current_time(obj, 1, 1);
-+ obj->yst_rdev = rdev;
-+ obj->yst_uid = uid;
-+ obj->yst_gid = gid;
-+}
-+
-+static loff_t yaffs_get_file_size(struct yaffs_obj *obj)
-+{
-+ YCHAR *alias = NULL;
-+ obj = yaffs_get_equivalent_obj(obj);
-+
-+ switch (obj->variant_type) {
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ return obj->variant.file_variant.file_size;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ alias = obj->variant.symlink_variant.alias;
-+ if (!alias)
-+ return 0;
-+ return strnlen(alias, YAFFS_MAX_ALIAS_LENGTH);
-+ default:
-+ return 0;
-+ }
-+}
-+
-+int yaffs_set_attribs(struct yaffs_obj *obj, struct iattr *attr)
-+{
-+ unsigned int valid = attr->ia_valid;
-+
-+ if (valid & ATTR_MODE)
-+ obj->yst_mode = attr->ia_mode;
-+ if (valid & ATTR_UID)
-+ obj->yst_uid = ia_uid_read(attr);
-+ if (valid & ATTR_GID)
-+ obj->yst_gid = ia_gid_read(attr);
-+
-+ if (valid & ATTR_ATIME)
-+ obj->yst_atime = Y_TIME_CONVERT(attr->ia_atime);
-+ if (valid & ATTR_CTIME)
-+ obj->yst_ctime = Y_TIME_CONVERT(attr->ia_ctime);
-+ if (valid & ATTR_MTIME)
-+ obj->yst_mtime = Y_TIME_CONVERT(attr->ia_mtime);
-+
-+ if (valid & ATTR_SIZE)
-+ yaffs_resize_file(obj, attr->ia_size);
-+
-+ yaffs_update_oh(obj, NULL, 1, 0, 0, NULL);
-+
-+ return YAFFS_OK;
-+
-+}
-+
-+int yaffs_get_attribs(struct yaffs_obj *obj, struct iattr *attr)
-+{
-+ unsigned int valid = 0;
-+
-+ attr->ia_mode = obj->yst_mode;
-+ valid |= ATTR_MODE;
-+ ia_uid_write(attr, obj->yst_uid);
-+ valid |= ATTR_UID;
-+ ia_gid_write(attr, obj->yst_gid);
-+ valid |= ATTR_GID;
-+
-+ Y_TIME_CONVERT(attr->ia_atime) = obj->yst_atime;
-+ valid |= ATTR_ATIME;
-+ Y_TIME_CONVERT(attr->ia_ctime) = obj->yst_ctime;
-+ valid |= ATTR_CTIME;
-+ Y_TIME_CONVERT(attr->ia_mtime) = obj->yst_mtime;
-+ valid |= ATTR_MTIME;
-+
-+ attr->ia_size = yaffs_get_file_size(obj);
-+ valid |= ATTR_SIZE;
-+
-+ attr->ia_valid = valid;
-+
-+ return YAFFS_OK;
-+}
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_attribs.h linux-3.10.40/fs/yaffs2/yaffs_attribs.h
---- linux-3.10.40.orig/fs/yaffs2/yaffs_attribs.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_attribs.h 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,28 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_ATTRIBS_H__
-+#define __YAFFS_ATTRIBS_H__
-+
-+#include "yaffs_guts.h"
-+
-+void yaffs_load_attribs(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh);
-+void yaffs_load_attribs_oh(struct yaffs_obj_hdr *oh, struct yaffs_obj *obj);
-+void yaffs_attribs_init(struct yaffs_obj *obj, u32 gid, u32 uid, u32 rdev);
-+void yaffs_load_current_time(struct yaffs_obj *obj, int do_a, int do_c);
-+int yaffs_set_attribs(struct yaffs_obj *obj, struct iattr *attr);
-+int yaffs_get_attribs(struct yaffs_obj *obj, struct iattr *attr);
-+
-+#endif
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_bitmap.c linux-3.10.40/fs/yaffs2/yaffs_bitmap.c
---- linux-3.10.40.orig/fs/yaffs2/yaffs_bitmap.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_bitmap.c 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,97 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_bitmap.h"
-+#include "yaffs_trace.h"
-+/*
-+ * Chunk bitmap manipulations
-+ */
-+
-+static inline u8 *yaffs_block_bits(struct yaffs_dev *dev, int blk)
-+{
-+ if (blk < dev->internal_start_block || blk > dev->internal_end_block) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "BlockBits block %d is not valid",
-+ blk);
-+ BUG();
-+ }
-+ return dev->chunk_bits +
-+ (dev->chunk_bit_stride * (blk - dev->internal_start_block));
-+}
-+
-+void yaffs_verify_chunk_bit_id(struct yaffs_dev *dev, int blk, int chunk)
-+{
-+ if (blk < dev->internal_start_block || blk > dev->internal_end_block ||
-+ chunk < 0 || chunk >= dev->param.chunks_per_block) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "Chunk Id (%d:%d) invalid",
-+ blk, chunk);
-+ BUG();
-+ }
-+}
-+
-+void yaffs_clear_chunk_bits(struct yaffs_dev *dev, int blk)
-+{
-+ u8 *blk_bits = yaffs_block_bits(dev, blk);
-+
-+ memset(blk_bits, 0, dev->chunk_bit_stride);
-+}
-+
-+void yaffs_clear_chunk_bit(struct yaffs_dev *dev, int blk, int chunk)
-+{
-+ u8 *blk_bits = yaffs_block_bits(dev, blk);
-+
-+ yaffs_verify_chunk_bit_id(dev, blk, chunk);
-+ blk_bits[chunk / 8] &= ~(1 << (chunk & 7));
-+}
-+
-+void yaffs_set_chunk_bit(struct yaffs_dev *dev, int blk, int chunk)
-+{
-+ u8 *blk_bits = yaffs_block_bits(dev, blk);
-+
-+ yaffs_verify_chunk_bit_id(dev, blk, chunk);
-+ blk_bits[chunk / 8] |= (1 << (chunk & 7));
-+}
-+
-+int yaffs_check_chunk_bit(struct yaffs_dev *dev, int blk, int chunk)
-+{
-+ u8 *blk_bits = yaffs_block_bits(dev, blk);
-+
-+ yaffs_verify_chunk_bit_id(dev, blk, chunk);
-+ return (blk_bits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0;
-+}
-+
-+int yaffs_still_some_chunks(struct yaffs_dev *dev, int blk)
-+{
-+ u8 *blk_bits = yaffs_block_bits(dev, blk);
-+ int i;
-+
-+ for (i = 0; i < dev->chunk_bit_stride; i++) {
-+ if (*blk_bits)
-+ return 1;
-+ blk_bits++;
-+ }
-+ return 0;
-+}
-+
-+int yaffs_count_chunk_bits(struct yaffs_dev *dev, int blk)
-+{
-+ u8 *blk_bits = yaffs_block_bits(dev, blk);
-+ int i;
-+ int n = 0;
-+
-+ for (i = 0; i < dev->chunk_bit_stride; i++, blk_bits++)
-+ n += hweight8(*blk_bits);
-+
-+ return n;
-+}
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_bitmap.h linux-3.10.40/fs/yaffs2/yaffs_bitmap.h
---- linux-3.10.40.orig/fs/yaffs2/yaffs_bitmap.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_bitmap.h 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,33 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+/*
-+ * Chunk bitmap manipulations
-+ */
-+
-+#ifndef __YAFFS_BITMAP_H__
-+#define __YAFFS_BITMAP_H__
-+
-+#include "yaffs_guts.h"
-+
-+void yaffs_verify_chunk_bit_id(struct yaffs_dev *dev, int blk, int chunk);
-+void yaffs_clear_chunk_bits(struct yaffs_dev *dev, int blk);
-+void yaffs_clear_chunk_bit(struct yaffs_dev *dev, int blk, int chunk);
-+void yaffs_set_chunk_bit(struct yaffs_dev *dev, int blk, int chunk);
-+int yaffs_check_chunk_bit(struct yaffs_dev *dev, int blk, int chunk);
-+int yaffs_still_some_chunks(struct yaffs_dev *dev, int blk);
-+int yaffs_count_chunk_bits(struct yaffs_dev *dev, int blk);
-+
-+#endif
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_checkptrw.c linux-3.10.40/fs/yaffs2/yaffs_checkptrw.c
---- linux-3.10.40.orig/fs/yaffs2/yaffs_checkptrw.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_checkptrw.c 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,474 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_checkptrw.h"
-+#include "yaffs_getblockinfo.h"
-+
-+struct yaffs_checkpt_chunk_hdr {
-+ int version;
-+ int seq;
-+ u32 sum;
-+ u32 xor;
-+} ;
-+
-+
-+static int apply_chunk_offset(struct yaffs_dev *dev, int chunk)
-+{
-+ return chunk - dev->chunk_offset;
-+}
-+
-+static int apply_block_offset(struct yaffs_dev *dev, int block)
-+{
-+ return block - dev->block_offset;
-+}
-+
-+static void yaffs2_checkpt_init_chunk_hdr(struct yaffs_dev *dev)
-+{
-+ struct yaffs_checkpt_chunk_hdr hdr;
-+
-+ hdr.version = YAFFS_CHECKPOINT_VERSION;
-+ hdr.seq = dev->checkpt_page_seq;
-+ hdr.sum = dev->checkpt_sum;
-+ hdr.xor = dev->checkpt_xor;
-+
-+ dev->checkpt_byte_offs = sizeof(hdr);
-+
-+ memcpy(dev->checkpt_buffer, &hdr, sizeof(hdr));
-+}
-+
-+static int yaffs2_checkpt_check_chunk_hdr(struct yaffs_dev *dev)
-+{
-+ struct yaffs_checkpt_chunk_hdr hdr;
-+
-+ memcpy(&hdr, dev->checkpt_buffer, sizeof(hdr));
-+
-+ dev->checkpt_byte_offs = sizeof(hdr);
-+
-+ return hdr.version == YAFFS_CHECKPOINT_VERSION &&
-+ hdr.seq == dev->checkpt_page_seq &&
-+ hdr.sum == dev->checkpt_sum &&
-+ hdr.xor == dev->checkpt_xor;
-+}
-+
-+static int yaffs2_checkpt_space_ok(struct yaffs_dev *dev)
-+{
-+ int blocks_avail = dev->n_erased_blocks - dev->param.n_reserved_blocks;
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "checkpt blocks_avail = %d", blocks_avail);
-+
-+ return (blocks_avail <= 0) ? 0 : 1;
-+}
-+
-+static int yaffs_checkpt_erase(struct yaffs_dev *dev)
-+{
-+ int i;
-+
-+ if (!dev->drv.drv_erase_fn)
-+ return 0;
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "checking blocks %d to %d",
-+ dev->internal_start_block, dev->internal_end_block);
-+
-+ for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, i);
-+ int offset_i = apply_block_offset(dev, i);
-+ int result;
-+
-+ if (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "erasing checkpt block %d", i);
-+
-+ dev->n_erasures++;
-+
-+ result = dev->drv.drv_erase_fn(dev, offset_i);
-+ if(result) {
-+ bi->block_state = YAFFS_BLOCK_STATE_EMPTY;
-+ dev->n_erased_blocks++;
-+ dev->n_free_chunks +=
-+ dev->param.chunks_per_block;
-+ } else {
-+ dev->drv.drv_mark_bad_fn(dev, offset_i);
-+ bi->block_state = YAFFS_BLOCK_STATE_DEAD;
-+ }
-+ }
-+ }
-+
-+ dev->blocks_in_checkpt = 0;
-+
-+ return 1;
-+}
-+
-+static void yaffs2_checkpt_find_erased_block(struct yaffs_dev *dev)
-+{
-+ int i;
-+ int blocks_avail = dev->n_erased_blocks - dev->param.n_reserved_blocks;
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "allocating checkpt block: erased %d reserved %d avail %d next %d ",
-+ dev->n_erased_blocks, dev->param.n_reserved_blocks,
-+ blocks_avail, dev->checkpt_next_block);
-+
-+ if (dev->checkpt_next_block >= 0 &&
-+ dev->checkpt_next_block <= dev->internal_end_block &&
-+ blocks_avail > 0) {
-+
-+ for (i = dev->checkpt_next_block; i <= dev->internal_end_block;
-+ i++) {
-+ struct yaffs_block_info *bi;
-+
-+ bi = yaffs_get_block_info(dev, i);
-+ if (bi->block_state == YAFFS_BLOCK_STATE_EMPTY) {
-+ dev->checkpt_next_block = i + 1;
-+ dev->checkpt_cur_block = i;
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "allocating checkpt block %d", i);
-+ return;
-+ }
-+ }
-+ }
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT, "out of checkpt blocks");
-+
-+ dev->checkpt_next_block = -1;
-+ dev->checkpt_cur_block = -1;
-+}
-+
-+static void yaffs2_checkpt_find_block(struct yaffs_dev *dev)
-+{
-+ int i;
-+ struct yaffs_ext_tags tags;
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "find next checkpt block: start: blocks %d next %d",
-+ dev->blocks_in_checkpt, dev->checkpt_next_block);
-+
-+ if (dev->blocks_in_checkpt < dev->checkpt_max_blocks)
-+ for (i = dev->checkpt_next_block; i <= dev->internal_end_block;
-+ i++) {
-+ int chunk = i * dev->param.chunks_per_block;
-+ enum yaffs_block_state state;
-+ u32 seq;
-+
-+ dev->tagger.read_chunk_tags_fn(dev,
-+ apply_chunk_offset(dev, chunk),
-+ NULL, &tags);
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "find next checkpt block: search: block %d state %d oid %d seq %d eccr %d",
-+ i, (int) state,
-+ tags.obj_id, tags.seq_number,
-+ tags.ecc_result);
-+
-+ if (tags.seq_number != YAFFS_SEQUENCE_CHECKPOINT_DATA)
-+ continue;
-+
-+ dev->tagger.query_block_fn(dev,
-+ apply_block_offset(dev, i),
-+ &state, &seq);
-+ if (state == YAFFS_BLOCK_STATE_DEAD)
-+ continue;
-+
-+ /* Right kind of block */
-+ dev->checkpt_next_block = tags.obj_id;
-+ dev->checkpt_cur_block = i;
-+ dev->checkpt_block_list[dev->blocks_in_checkpt] = i;
-+ dev->blocks_in_checkpt++;
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "found checkpt block %d", i);
-+ return;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT, "found no more checkpt blocks");
-+
-+ dev->checkpt_next_block = -1;
-+ dev->checkpt_cur_block = -1;
-+}
-+
-+int yaffs2_checkpt_open(struct yaffs_dev *dev, int writing)
-+{
-+ int i;
-+
-+ dev->checkpt_open_write = writing;
-+
-+ /* Got the functions we need? */
-+ if (!dev->tagger.write_chunk_tags_fn ||
-+ !dev->tagger.read_chunk_tags_fn ||
-+ !dev->drv.drv_erase_fn ||
-+ !dev->drv.drv_mark_bad_fn)
-+ return 0;
-+
-+ if (writing && !yaffs2_checkpt_space_ok(dev))
-+ return 0;
-+
-+ if (!dev->checkpt_buffer)
-+ dev->checkpt_buffer =
-+ kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS);
-+ if (!dev->checkpt_buffer)
-+ return 0;
-+
-+ dev->checkpt_page_seq = 0;
-+ dev->checkpt_byte_count = 0;
-+ dev->checkpt_sum = 0;
-+ dev->checkpt_xor = 0;
-+ dev->checkpt_cur_block = -1;
-+ dev->checkpt_cur_chunk = -1;
-+ dev->checkpt_next_block = dev->internal_start_block;
-+
-+ if (writing) {
-+ memset(dev->checkpt_buffer, 0, dev->data_bytes_per_chunk);
-+ yaffs2_checkpt_init_chunk_hdr(dev);
-+ return yaffs_checkpt_erase(dev);
-+ }
-+
-+ /* Opening for a read */
-+ /* Set to a value that will kick off a read */
-+ dev->checkpt_byte_offs = dev->data_bytes_per_chunk;
-+ /* A checkpoint block list of 1 checkpoint block per 16 block is
-+ * (hopefully) going to be way more than we need */
-+ dev->blocks_in_checkpt = 0;
-+ dev->checkpt_max_blocks =
-+ (dev->internal_end_block - dev->internal_start_block) / 16 + 2;
-+ dev->checkpt_block_list =
-+ kmalloc(sizeof(int) * dev->checkpt_max_blocks, GFP_NOFS);
-+
-+ if (!dev->checkpt_block_list)
-+ return 0;
-+
-+ for (i = 0; i < dev->checkpt_max_blocks; i++)
-+ dev->checkpt_block_list[i] = -1;
-+
-+ return 1;
-+}
-+
-+int yaffs2_get_checkpt_sum(struct yaffs_dev *dev, u32 * sum)
-+{
-+ u32 composite_sum;
-+
-+ composite_sum = (dev->checkpt_sum << 8) | (dev->checkpt_xor & 0xff);
-+ *sum = composite_sum;
-+ return 1;
-+}
-+
-+static int yaffs2_checkpt_flush_buffer(struct yaffs_dev *dev)
-+{
-+ int chunk;
-+ int offset_chunk;
-+ struct yaffs_ext_tags tags;
-+
-+ if (dev->checkpt_cur_block < 0) {
-+ yaffs2_checkpt_find_erased_block(dev);
-+ dev->checkpt_cur_chunk = 0;
-+ }
-+
-+ if (dev->checkpt_cur_block < 0)
-+ return 0;
-+
-+ tags.is_deleted = 0;
-+ tags.obj_id = dev->checkpt_next_block; /* Hint to next place to look */
-+ tags.chunk_id = dev->checkpt_page_seq + 1;
-+ tags.seq_number = YAFFS_SEQUENCE_CHECKPOINT_DATA;
-+ tags.n_bytes = dev->data_bytes_per_chunk;
-+ if (dev->checkpt_cur_chunk == 0) {
-+ /* First chunk we write for the block? Set block state to
-+ checkpoint */
-+ struct yaffs_block_info *bi =
-+ yaffs_get_block_info(dev, dev->checkpt_cur_block);
-+ bi->block_state = YAFFS_BLOCK_STATE_CHECKPOINT;
-+ dev->blocks_in_checkpt++;
-+ }
-+
-+ chunk =
-+ dev->checkpt_cur_block * dev->param.chunks_per_block +
-+ dev->checkpt_cur_chunk;
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "checkpoint wite buffer nand %d(%d:%d) objid %d chId %d",
-+ chunk, dev->checkpt_cur_block, dev->checkpt_cur_chunk,
-+ tags.obj_id, tags.chunk_id);
-+
-+ offset_chunk = apply_chunk_offset(dev, chunk);
-+
-+ dev->n_page_writes++;
-+
-+ dev->tagger.write_chunk_tags_fn(dev, offset_chunk,
-+ dev->checkpt_buffer, &tags);
-+ dev->checkpt_page_seq++;
-+ dev->checkpt_cur_chunk++;
-+ if (dev->checkpt_cur_chunk >= dev->param.chunks_per_block) {
-+ dev->checkpt_cur_chunk = 0;
-+ dev->checkpt_cur_block = -1;
-+ }
-+ memset(dev->checkpt_buffer, 0, dev->data_bytes_per_chunk);
-+
-+ yaffs2_checkpt_init_chunk_hdr(dev);
-+
-+
-+ return 1;
-+}
-+
-+int yaffs2_checkpt_wr(struct yaffs_dev *dev, const void *data, int n_bytes)
-+{
-+ int i = 0;
-+ int ok = 1;
-+ u8 *data_bytes = (u8 *) data;
-+
-+ if (!dev->checkpt_buffer)
-+ return 0;
-+
-+ if (!dev->checkpt_open_write)
-+ return -1;
-+
-+ while (i < n_bytes && ok) {
-+ dev->checkpt_buffer[dev->checkpt_byte_offs] = *data_bytes;
-+ dev->checkpt_sum += *data_bytes;
-+ dev->checkpt_xor ^= *data_bytes;
-+
-+ dev->checkpt_byte_offs++;
-+ i++;
-+ data_bytes++;
-+ dev->checkpt_byte_count++;
-+
-+ if (dev->checkpt_byte_offs < 0 ||
-+ dev->checkpt_byte_offs >= dev->data_bytes_per_chunk)
-+ ok = yaffs2_checkpt_flush_buffer(dev);
-+ }
-+
-+ return i;
-+}
-+
-+int yaffs2_checkpt_rd(struct yaffs_dev *dev, void *data, int n_bytes)
-+{
-+ int i = 0;
-+ int ok = 1;
-+ struct yaffs_ext_tags tags;
-+ int chunk;
-+ int offset_chunk;
-+ u8 *data_bytes = (u8 *) data;
-+
-+ if (!dev->checkpt_buffer)
-+ return 0;
-+
-+ if (dev->checkpt_open_write)
-+ return -1;
-+
-+ while (i < n_bytes && ok) {
-+
-+ if (dev->checkpt_byte_offs < 0 ||
-+ dev->checkpt_byte_offs >= dev->data_bytes_per_chunk) {
-+
-+ if (dev->checkpt_cur_block < 0) {
-+ yaffs2_checkpt_find_block(dev);
-+ dev->checkpt_cur_chunk = 0;
-+ }
-+
-+ if (dev->checkpt_cur_block < 0) {
-+ ok = 0;
-+ break;
-+ }
-+
-+ chunk = dev->checkpt_cur_block *
-+ dev->param.chunks_per_block +
-+ dev->checkpt_cur_chunk;
-+
-+ offset_chunk = apply_chunk_offset(dev, chunk);
-+ dev->n_page_reads++;
-+
-+ /* read in the next chunk */
-+ dev->tagger.read_chunk_tags_fn(dev,
-+ offset_chunk,
-+ dev->checkpt_buffer,
-+ &tags);
-+
-+ if (tags.chunk_id != (dev->checkpt_page_seq + 1) ||
-+ tags.ecc_result > YAFFS_ECC_RESULT_FIXED ||
-+ tags.seq_number != YAFFS_SEQUENCE_CHECKPOINT_DATA) {
-+ ok = 0;
-+ break;
-+ }
-+ if(!yaffs2_checkpt_check_chunk_hdr(dev)) {
-+ ok = 0;
-+ break;
-+ }
-+
-+ dev->checkpt_page_seq++;
-+ dev->checkpt_cur_chunk++;
-+
-+ if (dev->checkpt_cur_chunk >=
-+ dev->param.chunks_per_block)
-+ dev->checkpt_cur_block = -1;
-+
-+ }
-+
-+ *data_bytes = dev->checkpt_buffer[dev->checkpt_byte_offs];
-+ dev->checkpt_sum += *data_bytes;
-+ dev->checkpt_xor ^= *data_bytes;
-+ dev->checkpt_byte_offs++;
-+ i++;
-+ data_bytes++;
-+ dev->checkpt_byte_count++;
-+ }
-+
-+ return i;
-+}
-+
-+int yaffs_checkpt_close(struct yaffs_dev *dev)
-+{
-+ int i;
-+
-+ if (dev->checkpt_open_write) {
-+ if (dev->checkpt_byte_offs !=
-+ sizeof(sizeof(struct yaffs_checkpt_chunk_hdr)))
-+ yaffs2_checkpt_flush_buffer(dev);
-+ } else if (dev->checkpt_block_list) {
-+ for (i = 0;
-+ i < dev->blocks_in_checkpt &&
-+ dev->checkpt_block_list[i] >= 0; i++) {
-+ int blk = dev->checkpt_block_list[i];
-+ struct yaffs_block_info *bi = NULL;
-+
-+ if (dev->internal_start_block <= blk &&
-+ blk <= dev->internal_end_block)
-+ bi = yaffs_get_block_info(dev, blk);
-+ if (bi && bi->block_state == YAFFS_BLOCK_STATE_EMPTY)
-+ bi->block_state = YAFFS_BLOCK_STATE_CHECKPOINT;
-+ }
-+ kfree(dev->checkpt_block_list);
-+ dev->checkpt_block_list = NULL;
-+ }
-+
-+ dev->n_free_chunks -=
-+ dev->blocks_in_checkpt * dev->param.chunks_per_block;
-+ dev->n_erased_blocks -= dev->blocks_in_checkpt;
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT, "checkpoint byte count %d",
-+ dev->checkpt_byte_count);
-+
-+ if (dev->checkpt_buffer) {
-+ /* free the buffer */
-+ kfree(dev->checkpt_buffer);
-+ dev->checkpt_buffer = NULL;
-+ return 1;
-+ } else {
-+ return 0;
-+ }
-+}
-+
-+int yaffs2_checkpt_invalidate_stream(struct yaffs_dev *dev)
-+{
-+ /* Erase the checkpoint data */
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "checkpoint invalidate of %d blocks",
-+ dev->blocks_in_checkpt);
-+
-+ return yaffs_checkpt_erase(dev);
-+}
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_checkptrw.h linux-3.10.40/fs/yaffs2/yaffs_checkptrw.h
---- linux-3.10.40.orig/fs/yaffs2/yaffs_checkptrw.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_checkptrw.h 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,33 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_CHECKPTRW_H__
-+#define __YAFFS_CHECKPTRW_H__
-+
-+#include "yaffs_guts.h"
-+
-+int yaffs2_checkpt_open(struct yaffs_dev *dev, int writing);
-+
-+int yaffs2_checkpt_wr(struct yaffs_dev *dev, const void *data, int n_bytes);
-+
-+int yaffs2_checkpt_rd(struct yaffs_dev *dev, void *data, int n_bytes);
-+
-+int yaffs2_get_checkpt_sum(struct yaffs_dev *dev, u32 * sum);
-+
-+int yaffs_checkpt_close(struct yaffs_dev *dev);
-+
-+int yaffs2_checkpt_invalidate_stream(struct yaffs_dev *dev);
-+
-+#endif
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_ecc.c linux-3.10.40/fs/yaffs2/yaffs_ecc.c
---- linux-3.10.40.orig/fs/yaffs2/yaffs_ecc.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_ecc.c 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,281 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+/*
-+ * This code implements the ECC algorithm used in SmartMedia.
-+ *
-+ * The ECC comprises 22 bits of parity information and is stuffed into 3 bytes.
-+ * The two unused bit are set to 1.
-+ * The ECC can correct single bit errors in a 256-byte page of data. Thus, two
-+ * such ECC blocks are used on a 512-byte NAND page.
-+ *
-+ */
-+
-+#include "yportenv.h"
-+
-+#include "yaffs_ecc.h"
-+
-+/* Table generated by gen-ecc.c
-+ * Using a table means we do not have to calculate p1..p4 and p1'..p4'
-+ * for each byte of data. These are instead provided in a table in bits7..2.
-+ * Bit 0 of each entry indicates whether the entry has an odd or even parity,
-+ * and therefore this bytes influence on the line parity.
-+ */
-+
-+static const unsigned char column_parity_table[] = {
-+ 0x00, 0x55, 0x59, 0x0c, 0x65, 0x30, 0x3c, 0x69,
-+ 0x69, 0x3c, 0x30, 0x65, 0x0c, 0x59, 0x55, 0x00,
-+ 0x95, 0xc0, 0xcc, 0x99, 0xf0, 0xa5, 0xa9, 0xfc,
-+ 0xfc, 0xa9, 0xa5, 0xf0, 0x99, 0xcc, 0xc0, 0x95,
-+ 0x99, 0xcc, 0xc0, 0x95, 0xfc, 0xa9, 0xa5, 0xf0,
-+ 0xf0, 0xa5, 0xa9, 0xfc, 0x95, 0xc0, 0xcc, 0x99,
-+ 0x0c, 0x59, 0x55, 0x00, 0x69, 0x3c, 0x30, 0x65,
-+ 0x65, 0x30, 0x3c, 0x69, 0x00, 0x55, 0x59, 0x0c,
-+ 0xa5, 0xf0, 0xfc, 0xa9, 0xc0, 0x95, 0x99, 0xcc,
-+ 0xcc, 0x99, 0x95, 0xc0, 0xa9, 0xfc, 0xf0, 0xa5,
-+ 0x30, 0x65, 0x69, 0x3c, 0x55, 0x00, 0x0c, 0x59,
-+ 0x59, 0x0c, 0x00, 0x55, 0x3c, 0x69, 0x65, 0x30,
-+ 0x3c, 0x69, 0x65, 0x30, 0x59, 0x0c, 0x00, 0x55,
-+ 0x55, 0x00, 0x0c, 0x59, 0x30, 0x65, 0x69, 0x3c,
-+ 0xa9, 0xfc, 0xf0, 0xa5, 0xcc, 0x99, 0x95, 0xc0,
-+ 0xc0, 0x95, 0x99, 0xcc, 0xa5, 0xf0, 0xfc, 0xa9,
-+ 0xa9, 0xfc, 0xf0, 0xa5, 0xcc, 0x99, 0x95, 0xc0,
-+ 0xc0, 0x95, 0x99, 0xcc, 0xa5, 0xf0, 0xfc, 0xa9,
-+ 0x3c, 0x69, 0x65, 0x30, 0x59, 0x0c, 0x00, 0x55,
-+ 0x55, 0x00, 0x0c, 0x59, 0x30, 0x65, 0x69, 0x3c,
-+ 0x30, 0x65, 0x69, 0x3c, 0x55, 0x00, 0x0c, 0x59,
-+ 0x59, 0x0c, 0x00, 0x55, 0x3c, 0x69, 0x65, 0x30,
-+ 0xa5, 0xf0, 0xfc, 0xa9, 0xc0, 0x95, 0x99, 0xcc,
-+ 0xcc, 0x99, 0x95, 0xc0, 0xa9, 0xfc, 0xf0, 0xa5,
-+ 0x0c, 0x59, 0x55, 0x00, 0x69, 0x3c, 0x30, 0x65,
-+ 0x65, 0x30, 0x3c, 0x69, 0x00, 0x55, 0x59, 0x0c,
-+ 0x99, 0xcc, 0xc0, 0x95, 0xfc, 0xa9, 0xa5, 0xf0,
-+ 0xf0, 0xa5, 0xa9, 0xfc, 0x95, 0xc0, 0xcc, 0x99,
-+ 0x95, 0xc0, 0xcc, 0x99, 0xf0, 0xa5, 0xa9, 0xfc,
-+ 0xfc, 0xa9, 0xa5, 0xf0, 0x99, 0xcc, 0xc0, 0x95,
-+ 0x00, 0x55, 0x59, 0x0c, 0x65, 0x30, 0x3c, 0x69,
-+ 0x69, 0x3c, 0x30, 0x65, 0x0c, 0x59, 0x55, 0x00,
-+};
-+
-+
-+/* Calculate the ECC for a 256-byte block of data */
-+void yaffs_ecc_calc(const unsigned char *data, unsigned char *ecc)
-+{
-+ unsigned int i;
-+ unsigned char col_parity = 0;
-+ unsigned char line_parity = 0;
-+ unsigned char line_parity_prime = 0;
-+ unsigned char t;
-+ unsigned char b;
-+
-+ for (i = 0; i < 256; i++) {
-+ b = column_parity_table[*data++];
-+ col_parity ^= b;
-+
-+ if (b & 0x01) { /* odd number of bits in the byte */
-+ line_parity ^= i;
-+ line_parity_prime ^= ~i;
-+ }
-+ }
-+
-+ ecc[2] = (~col_parity) | 0x03;
-+
-+ t = 0;
-+ if (line_parity & 0x80)
-+ t |= 0x80;
-+ if (line_parity_prime & 0x80)
-+ t |= 0x40;
-+ if (line_parity & 0x40)
-+ t |= 0x20;
-+ if (line_parity_prime & 0x40)
-+ t |= 0x10;
-+ if (line_parity & 0x20)
-+ t |= 0x08;
-+ if (line_parity_prime & 0x20)
-+ t |= 0x04;
-+ if (line_parity & 0x10)
-+ t |= 0x02;
-+ if (line_parity_prime & 0x10)
-+ t |= 0x01;
-+ ecc[1] = ~t;
-+
-+ t = 0;
-+ if (line_parity & 0x08)
-+ t |= 0x80;
-+ if (line_parity_prime & 0x08)
-+ t |= 0x40;
-+ if (line_parity & 0x04)
-+ t |= 0x20;
-+ if (line_parity_prime & 0x04)
-+ t |= 0x10;
-+ if (line_parity & 0x02)
-+ t |= 0x08;
-+ if (line_parity_prime & 0x02)
-+ t |= 0x04;
-+ if (line_parity & 0x01)
-+ t |= 0x02;
-+ if (line_parity_prime & 0x01)
-+ t |= 0x01;
-+ ecc[0] = ~t;
-+
-+}
-+
-+/* Correct the ECC on a 256 byte block of data */
-+
-+int yaffs_ecc_correct(unsigned char *data, unsigned char *read_ecc,
-+ const unsigned char *test_ecc)
-+{
-+ unsigned char d0, d1, d2; /* deltas */
-+
-+ d0 = read_ecc[0] ^ test_ecc[0];
-+ d1 = read_ecc[1] ^ test_ecc[1];
-+ d2 = read_ecc[2] ^ test_ecc[2];
-+
-+ if ((d0 | d1 | d2) == 0)
-+ return 0; /* no error */
-+
-+ if (((d0 ^ (d0 >> 1)) & 0x55) == 0x55 &&
-+ ((d1 ^ (d1 >> 1)) & 0x55) == 0x55 &&
-+ ((d2 ^ (d2 >> 1)) & 0x54) == 0x54) {
-+ /* Single bit (recoverable) error in data */
-+
-+ unsigned byte;
-+ unsigned bit;
-+
-+ bit = byte = 0;
-+
-+ if (d1 & 0x80)
-+ byte |= 0x80;
-+ if (d1 & 0x20)
-+ byte |= 0x40;
-+ if (d1 & 0x08)
-+ byte |= 0x20;
-+ if (d1 & 0x02)
-+ byte |= 0x10;
-+ if (d0 & 0x80)
-+ byte |= 0x08;
-+ if (d0 & 0x20)
-+ byte |= 0x04;
-+ if (d0 & 0x08)
-+ byte |= 0x02;
-+ if (d0 & 0x02)
-+ byte |= 0x01;
-+
-+ if (d2 & 0x80)
-+ bit |= 0x04;
-+ if (d2 & 0x20)
-+ bit |= 0x02;
-+ if (d2 & 0x08)
-+ bit |= 0x01;
-+
-+ data[byte] ^= (1 << bit);
-+
-+ return 1; /* Corrected the error */
-+ }
-+
-+ if ((hweight8(d0) + hweight8(d1) + hweight8(d2)) == 1) {
-+ /* Reccoverable error in ecc */
-+
-+ read_ecc[0] = test_ecc[0];
-+ read_ecc[1] = test_ecc[1];
-+ read_ecc[2] = test_ecc[2];
-+
-+ return 1; /* Corrected the error */
-+ }
-+
-+ /* Unrecoverable error */
-+
-+ return -1;
-+
-+}
-+
-+/*
-+ * ECCxxxOther does ECC calcs on arbitrary n bytes of data
-+ */
-+void yaffs_ecc_calc_other(const unsigned char *data, unsigned n_bytes,
-+ struct yaffs_ecc_other *ecc_other)
-+{
-+ unsigned int i;
-+ unsigned char col_parity = 0;
-+ unsigned line_parity = 0;
-+ unsigned line_parity_prime = 0;
-+ unsigned char b;
-+
-+ for (i = 0; i < n_bytes; i++) {
-+ b = column_parity_table[*data++];
-+ col_parity ^= b;
-+
-+ if (b & 0x01) {
-+ /* odd number of bits in the byte */
-+ line_parity ^= i;
-+ line_parity_prime ^= ~i;
-+ }
-+
-+ }
-+
-+ ecc_other->col_parity = (col_parity >> 2) & 0x3f;
-+ ecc_other->line_parity = line_parity;
-+ ecc_other->line_parity_prime = line_parity_prime;
-+}
-+
-+int yaffs_ecc_correct_other(unsigned char *data, unsigned n_bytes,
-+ struct yaffs_ecc_other *read_ecc,
-+ const struct yaffs_ecc_other *test_ecc)
-+{
-+ unsigned char delta_col; /* column parity delta */
-+ unsigned delta_line; /* line parity delta */
-+ unsigned delta_line_prime; /* line parity delta */
-+ unsigned bit;
-+
-+ delta_col = read_ecc->col_parity ^ test_ecc->col_parity;
-+ delta_line = read_ecc->line_parity ^ test_ecc->line_parity;
-+ delta_line_prime =
-+ read_ecc->line_parity_prime ^ test_ecc->line_parity_prime;
-+
-+ if ((delta_col | delta_line | delta_line_prime) == 0)
-+ return 0; /* no error */
-+
-+ if (delta_line == ~delta_line_prime &&
-+ (((delta_col ^ (delta_col >> 1)) & 0x15) == 0x15)) {
-+ /* Single bit (recoverable) error in data */
-+
-+ bit = 0;
-+
-+ if (delta_col & 0x20)
-+ bit |= 0x04;
-+ if (delta_col & 0x08)
-+ bit |= 0x02;
-+ if (delta_col & 0x02)
-+ bit |= 0x01;
-+
-+ if (delta_line >= n_bytes)
-+ return -1;
-+
-+ data[delta_line] ^= (1 << bit);
-+
-+ return 1; /* corrected */
-+ }
-+
-+ if ((hweight32(delta_line) +
-+ hweight32(delta_line_prime) +
-+ hweight8(delta_col)) == 1) {
-+ /* Reccoverable error in ecc */
-+
-+ *read_ecc = *test_ecc;
-+ return 1; /* corrected */
-+ }
-+
-+ /* Unrecoverable error */
-+
-+ return -1;
-+}
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_ecc.h linux-3.10.40/fs/yaffs2/yaffs_ecc.h
---- linux-3.10.40.orig/fs/yaffs2/yaffs_ecc.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_ecc.h 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,44 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+/*
-+ * This code implements the ECC algorithm used in SmartMedia.
-+ *
-+ * The ECC comprises 22 bits of parity information and is stuffed into 3 bytes.
-+ * The two unused bit are set to 1.
-+ * The ECC can correct single bit errors in a 256-byte page of data.
-+ * Thus, two such ECC blocks are used on a 512-byte NAND page.
-+ *
-+ */
-+
-+#ifndef __YAFFS_ECC_H__
-+#define __YAFFS_ECC_H__
-+
-+struct yaffs_ecc_other {
-+ unsigned char col_parity;
-+ unsigned line_parity;
-+ unsigned line_parity_prime;
-+};
-+
-+void yaffs_ecc_calc(const unsigned char *data, unsigned char *ecc);
-+int yaffs_ecc_correct(unsigned char *data, unsigned char *read_ecc,
-+ const unsigned char *test_ecc);
-+
-+void yaffs_ecc_calc_other(const unsigned char *data, unsigned n_bytes,
-+ struct yaffs_ecc_other *ecc);
-+int yaffs_ecc_correct_other(unsigned char *data, unsigned n_bytes,
-+ struct yaffs_ecc_other *read_ecc,
-+ const struct yaffs_ecc_other *test_ecc);
-+#endif
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_getblockinfo.h linux-3.10.40/fs/yaffs2/yaffs_getblockinfo.h
---- linux-3.10.40.orig/fs/yaffs2/yaffs_getblockinfo.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_getblockinfo.h 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,35 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_GETBLOCKINFO_H__
-+#define __YAFFS_GETBLOCKINFO_H__
-+
-+#include "yaffs_guts.h"
-+#include "yaffs_trace.h"
-+
-+/* Function to manipulate block info */
-+static inline struct yaffs_block_info *yaffs_get_block_info(struct yaffs_dev
-+ *dev, int blk)
-+{
-+ if (blk < dev->internal_start_block || blk > dev->internal_end_block) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "**>> yaffs: get_block_info block %d is not valid",
-+ blk);
-+ BUG();
-+ }
-+ return &dev->block_info[blk - dev->internal_start_block];
-+}
-+
-+#endif
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_guts.c linux-3.10.40/fs/yaffs2/yaffs_guts.c
---- linux-3.10.40.orig/fs/yaffs2/yaffs_guts.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_guts.c 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,5146 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yportenv.h"
-+#include "yaffs_trace.h"
-+
-+#include "yaffs_guts.h"
-+#include "yaffs_getblockinfo.h"
-+#include "yaffs_tagscompat.h"
-+#include "yaffs_tagsmarshall.h"
-+#include "yaffs_nand.h"
-+#include "yaffs_yaffs1.h"
-+#include "yaffs_yaffs2.h"
-+#include "yaffs_bitmap.h"
-+#include "yaffs_verify.h"
-+#include "yaffs_nand.h"
-+#include "yaffs_packedtags2.h"
-+#include "yaffs_nameval.h"
-+#include "yaffs_allocator.h"
-+#include "yaffs_attribs.h"
-+#include "yaffs_summary.h"
-+
-+/* Note YAFFS_GC_GOOD_ENOUGH must be <= YAFFS_GC_PASSIVE_THRESHOLD */
-+#define YAFFS_GC_GOOD_ENOUGH 2
-+#define YAFFS_GC_PASSIVE_THRESHOLD 4
-+
-+#include "yaffs_ecc.h"
-+
-+/* Forward declarations */
-+
-+static int yaffs_wr_data_obj(struct yaffs_obj *in, int inode_chunk,
-+ const u8 *buffer, int n_bytes, int use_reserve);
-+
-+static void yaffs_fix_null_name(struct yaffs_obj *obj, YCHAR *name,
-+ int buffer_size);
-+
-+/* Function to calculate chunk and offset */
-+
-+void yaffs_addr_to_chunk(struct yaffs_dev *dev, loff_t addr,
-+ int *chunk_out, u32 *offset_out)
-+{
-+ int chunk;
-+ u32 offset;
-+
-+ chunk = (u32) (addr >> dev->chunk_shift);
-+
-+ if (dev->chunk_div == 1) {
-+ /* easy power of 2 case */
-+ offset = (u32) (addr & dev->chunk_mask);
-+ } else {
-+ /* Non power-of-2 case */
-+
-+ loff_t chunk_base;
-+
-+ chunk /= dev->chunk_div;
-+
-+ chunk_base = ((loff_t) chunk) * dev->data_bytes_per_chunk;
-+ offset = (u32) (addr - chunk_base);
-+ }
-+
-+ *chunk_out = chunk;
-+ *offset_out = offset;
-+}
-+
-+/* Function to return the number of shifts for a power of 2 greater than or
-+ * equal to the given number
-+ * Note we don't try to cater for all possible numbers and this does not have to
-+ * be hellishly efficient.
-+ */
-+
-+static inline u32 calc_shifts_ceiling(u32 x)
-+{
-+ int extra_bits;
-+ int shifts;
-+
-+ shifts = extra_bits = 0;
-+
-+ while (x > 1) {
-+ if (x & 1)
-+ extra_bits++;
-+ x >>= 1;
-+ shifts++;
-+ }
-+
-+ if (extra_bits)
-+ shifts++;
-+
-+ return shifts;
-+}
-+
-+/* Function to return the number of shifts to get a 1 in bit 0
-+ */
-+
-+static inline u32 calc_shifts(u32 x)
-+{
-+ u32 shifts;
-+
-+ shifts = 0;
-+
-+ if (!x)
-+ return 0;
-+
-+ while (!(x & 1)) {
-+ x >>= 1;
-+ shifts++;
-+ }
-+
-+ return shifts;
-+}
-+
-+/*
-+ * Temporary buffer manipulations.
-+ */
-+
-+static int yaffs_init_tmp_buffers(struct yaffs_dev *dev)
-+{
-+ int i;
-+ u8 *buf = (u8 *) 1;
-+
-+ memset(dev->temp_buffer, 0, sizeof(dev->temp_buffer));
-+
-+ for (i = 0; buf && i < YAFFS_N_TEMP_BUFFERS; i++) {
-+ dev->temp_buffer[i].in_use = 0;
-+ buf = kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS);
-+ dev->temp_buffer[i].buffer = buf;
-+ }
-+
-+ return buf ? YAFFS_OK : YAFFS_FAIL;
-+}
-+
-+u8 *yaffs_get_temp_buffer(struct yaffs_dev * dev)
-+{
-+ int i;
-+
-+ dev->temp_in_use++;
-+ if (dev->temp_in_use > dev->max_temp)
-+ dev->max_temp = dev->temp_in_use;
-+
-+ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
-+ if (dev->temp_buffer[i].in_use == 0) {
-+ dev->temp_buffer[i].in_use = 1;
-+ return dev->temp_buffer[i].buffer;
-+ }
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_BUFFERS, "Out of temp buffers");
-+ /*
-+ * If we got here then we have to allocate an unmanaged one
-+ * This is not good.
-+ */
-+
-+ dev->unmanaged_buffer_allocs++;
-+ return kmalloc(dev->data_bytes_per_chunk, GFP_NOFS);
-+
-+}
-+
-+void yaffs_release_temp_buffer(struct yaffs_dev *dev, u8 *buffer)
-+{
-+ int i;
-+
-+ dev->temp_in_use--;
-+
-+ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
-+ if (dev->temp_buffer[i].buffer == buffer) {
-+ dev->temp_buffer[i].in_use = 0;
-+ return;
-+ }
-+ }
-+
-+ if (buffer) {
-+ /* assume it is an unmanaged one. */
-+ yaffs_trace(YAFFS_TRACE_BUFFERS,
-+ "Releasing unmanaged temp buffer");
-+ kfree(buffer);
-+ dev->unmanaged_buffer_deallocs++;
-+ }
-+
-+}
-+
-+/*
-+ * Functions for robustisizing TODO
-+ *
-+ */
-+
-+static void yaffs_handle_chunk_wr_ok(struct yaffs_dev *dev, int nand_chunk,
-+ const u8 *data,
-+ const struct yaffs_ext_tags *tags)
-+{
-+ (void) dev;
-+ (void) nand_chunk;
-+ (void) data;
-+ (void) tags;
-+}
-+
-+static void yaffs_handle_chunk_update(struct yaffs_dev *dev, int nand_chunk,
-+ const struct yaffs_ext_tags *tags)
-+{
-+ (void) dev;
-+ (void) nand_chunk;
-+ (void) tags;
-+}
-+
-+void yaffs_handle_chunk_error(struct yaffs_dev *dev,
-+ struct yaffs_block_info *bi)
-+{
-+ if (!bi->gc_prioritise) {
-+ bi->gc_prioritise = 1;
-+ dev->has_pending_prioritised_gc = 1;
-+ bi->chunk_error_strikes++;
-+
-+ if (bi->chunk_error_strikes > 3) {
-+ bi->needs_retiring = 1; /* Too many stikes, so retire */
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs: Block struck out");
-+
-+ }
-+ }
-+}
-+
-+static void yaffs_handle_chunk_wr_error(struct yaffs_dev *dev, int nand_chunk,
-+ int erased_ok)
-+{
-+ int flash_block = nand_chunk / dev->param.chunks_per_block;
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, flash_block);
-+
-+ yaffs_handle_chunk_error(dev, bi);
-+
-+ if (erased_ok) {
-+ /* Was an actual write failure,
-+ * so mark the block for retirement.*/
-+ bi->needs_retiring = 1;
-+ yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
-+ "**>> Block %d needs retiring", flash_block);
-+ }
-+
-+ /* Delete the chunk */
-+ yaffs_chunk_del(dev, nand_chunk, 1, __LINE__);
-+ yaffs_skip_rest_of_block(dev);
-+}
-+
-+/*
-+ * Verification code
-+ */
-+
-+/*
-+ * Simple hash function. Needs to have a reasonable spread
-+ */
-+
-+static inline int yaffs_hash_fn(int n)
-+{
-+ if (n < 0)
-+ n = -n;
-+ return n % YAFFS_NOBJECT_BUCKETS;
-+}
-+
-+/*
-+ * Access functions to useful fake objects.
-+ * Note that root might have a presence in NAND if permissions are set.
-+ */
-+
-+struct yaffs_obj *yaffs_root(struct yaffs_dev *dev)
-+{
-+ return dev->root_dir;
-+}
-+
-+struct yaffs_obj *yaffs_lost_n_found(struct yaffs_dev *dev)
-+{
-+ return dev->lost_n_found;
-+}
-+
-+/*
-+ * Erased NAND checking functions
-+ */
-+
-+int yaffs_check_ff(u8 *buffer, int n_bytes)
-+{
-+ /* Horrible, slow implementation */
-+ while (n_bytes--) {
-+ if (*buffer != 0xff)
-+ return 0;
-+ buffer++;
-+ }
-+ return 1;
-+}
-+
-+static int yaffs_check_chunk_erased(struct yaffs_dev *dev, int nand_chunk)
-+{
-+ int retval = YAFFS_OK;
-+ u8 *data = yaffs_get_temp_buffer(dev);
-+ struct yaffs_ext_tags tags;
-+ int result;
-+
-+ result = yaffs_rd_chunk_tags_nand(dev, nand_chunk, data, &tags);
-+
-+ if (tags.ecc_result > YAFFS_ECC_RESULT_NO_ERROR)
-+ retval = YAFFS_FAIL;
-+
-+ if (!yaffs_check_ff(data, dev->data_bytes_per_chunk) ||
-+ tags.chunk_used) {
-+ yaffs_trace(YAFFS_TRACE_NANDACCESS,
-+ "Chunk %d not erased", nand_chunk);
-+ retval = YAFFS_FAIL;
-+ }
-+
-+ yaffs_release_temp_buffer(dev, data);
-+
-+ return retval;
-+
-+}
-+
-+static int yaffs_verify_chunk_written(struct yaffs_dev *dev,
-+ int nand_chunk,
-+ const u8 *data,
-+ struct yaffs_ext_tags *tags)
-+{
-+ int retval = YAFFS_OK;
-+ struct yaffs_ext_tags temp_tags;
-+ u8 *buffer = yaffs_get_temp_buffer(dev);
-+ int result;
-+
-+ result = yaffs_rd_chunk_tags_nand(dev, nand_chunk, buffer, &temp_tags);
-+ if (memcmp(buffer, data, dev->data_bytes_per_chunk) ||
-+ temp_tags.obj_id != tags->obj_id ||
-+ temp_tags.chunk_id != tags->chunk_id ||
-+ temp_tags.n_bytes != tags->n_bytes)
-+ retval = YAFFS_FAIL;
-+
-+ yaffs_release_temp_buffer(dev, buffer);
-+
-+ return retval;
-+}
-+
-+
-+int yaffs_check_alloc_available(struct yaffs_dev *dev, int n_chunks)
-+{
-+ int reserved_chunks;
-+ int reserved_blocks = dev->param.n_reserved_blocks;
-+ int checkpt_blocks;
-+
-+ checkpt_blocks = yaffs_calc_checkpt_blocks_required(dev);
-+
-+ reserved_chunks =
-+ (reserved_blocks + checkpt_blocks) * dev->param.chunks_per_block;
-+
-+ return (dev->n_free_chunks > (reserved_chunks + n_chunks));
-+}
-+
-+static int yaffs_find_alloc_block(struct yaffs_dev *dev)
-+{
-+ int i;
-+ struct yaffs_block_info *bi;
-+
-+ if (dev->n_erased_blocks < 1) {
-+ /* Hoosterman we've got a problem.
-+ * Can't get space to gc
-+ */
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs tragedy: no more erased blocks");
-+
-+ return -1;
-+ }
-+
-+ /* Find an empty block. */
-+
-+ for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
-+ dev->alloc_block_finder++;
-+ if (dev->alloc_block_finder < dev->internal_start_block
-+ || dev->alloc_block_finder > dev->internal_end_block) {
-+ dev->alloc_block_finder = dev->internal_start_block;
-+ }
-+
-+ bi = yaffs_get_block_info(dev, dev->alloc_block_finder);
-+
-+ if (bi->block_state == YAFFS_BLOCK_STATE_EMPTY) {
-+ bi->block_state = YAFFS_BLOCK_STATE_ALLOCATING;
-+ dev->seq_number++;
-+ bi->seq_number = dev->seq_number;
-+ dev->n_erased_blocks--;
-+ yaffs_trace(YAFFS_TRACE_ALLOCATE,
-+ "Allocated block %d, seq %d, %d left" ,
-+ dev->alloc_block_finder, dev->seq_number,
-+ dev->n_erased_blocks);
-+ return dev->alloc_block_finder;
-+ }
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs tragedy: no more erased blocks, but there should have been %d",
-+ dev->n_erased_blocks);
-+
-+ return -1;
-+}
-+
-+static int yaffs_alloc_chunk(struct yaffs_dev *dev, int use_reserver,
-+ struct yaffs_block_info **block_ptr)
-+{
-+ int ret_val;
-+ struct yaffs_block_info *bi;
-+
-+ if (dev->alloc_block < 0) {
-+ /* Get next block to allocate off */
-+ dev->alloc_block = yaffs_find_alloc_block(dev);
-+ dev->alloc_page = 0;
-+ }
-+
-+ if (!use_reserver && !yaffs_check_alloc_available(dev, 1)) {
-+ /* No space unless we're allowed to use the reserve. */
-+ return -1;
-+ }
-+
-+ if (dev->n_erased_blocks < dev->param.n_reserved_blocks
-+ && dev->alloc_page == 0)
-+ yaffs_trace(YAFFS_TRACE_ALLOCATE, "Allocating reserve");
-+
-+ /* Next page please.... */
-+ if (dev->alloc_block >= 0) {
-+ bi = yaffs_get_block_info(dev, dev->alloc_block);
-+
-+ ret_val = (dev->alloc_block * dev->param.chunks_per_block) +
-+ dev->alloc_page;
-+ bi->pages_in_use++;
-+ yaffs_set_chunk_bit(dev, dev->alloc_block, dev->alloc_page);
-+
-+ dev->alloc_page++;
-+
-+ dev->n_free_chunks--;
-+
-+ /* If the block is full set the state to full */
-+ if (dev->alloc_page >= dev->param.chunks_per_block) {
-+ bi->block_state = YAFFS_BLOCK_STATE_FULL;
-+ dev->alloc_block = -1;
-+ }
-+
-+ if (block_ptr)
-+ *block_ptr = bi;
-+
-+ return ret_val;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!");
-+
-+ return -1;
-+}
-+
-+static int yaffs_get_erased_chunks(struct yaffs_dev *dev)
-+{
-+ int n;
-+
-+ n = dev->n_erased_blocks * dev->param.chunks_per_block;
-+
-+ if (dev->alloc_block > 0)
-+ n += (dev->param.chunks_per_block - dev->alloc_page);
-+
-+ return n;
-+
-+}
-+
-+/*
-+ * yaffs_skip_rest_of_block() skips over the rest of the allocation block
-+ * if we don't want to write to it.
-+ */
-+void yaffs_skip_rest_of_block(struct yaffs_dev *dev)
-+{
-+ struct yaffs_block_info *bi;
-+
-+ if (dev->alloc_block > 0) {
-+ bi = yaffs_get_block_info(dev, dev->alloc_block);
-+ if (bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING) {
-+ bi->block_state = YAFFS_BLOCK_STATE_FULL;
-+ dev->alloc_block = -1;
-+ }
-+ }
-+}
-+
-+static int yaffs_write_new_chunk(struct yaffs_dev *dev,
-+ const u8 *data,
-+ struct yaffs_ext_tags *tags, int use_reserver)
-+{
-+ int attempts = 0;
-+ int write_ok = 0;
-+ int chunk;
-+
-+ yaffs2_checkpt_invalidate(dev);
-+
-+ do {
-+ struct yaffs_block_info *bi = 0;
-+ int erased_ok = 0;
-+
-+ chunk = yaffs_alloc_chunk(dev, use_reserver, &bi);
-+ if (chunk < 0) {
-+ /* no space */
-+ break;
-+ }
-+
-+ /* First check this chunk is erased, if it needs
-+ * checking. The checking policy (unless forced
-+ * always on) is as follows:
-+ *
-+ * Check the first page we try to write in a block.
-+ * If the check passes then we don't need to check any
-+ * more. If the check fails, we check again...
-+ * If the block has been erased, we don't need to check.
-+ *
-+ * However, if the block has been prioritised for gc,
-+ * then we think there might be something odd about
-+ * this block and stop using it.
-+ *
-+ * Rationale: We should only ever see chunks that have
-+ * not been erased if there was a partially written
-+ * chunk due to power loss. This checking policy should
-+ * catch that case with very few checks and thus save a
-+ * lot of checks that are most likely not needed.
-+ *
-+ * Mods to the above
-+ * If an erase check fails or the write fails we skip the
-+ * rest of the block.
-+ */
-+
-+ /* let's give it a try */
-+ attempts++;
-+
-+ if (dev->param.always_check_erased)
-+ bi->skip_erased_check = 0;
-+
-+ if (!bi->skip_erased_check) {
-+ erased_ok = yaffs_check_chunk_erased(dev, chunk);
-+ if (erased_ok != YAFFS_OK) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "**>> yaffs chunk %d was not erased",
-+ chunk);
-+
-+ /* If not erased, delete this one,
-+ * skip rest of block and
-+ * try another chunk */
-+ yaffs_chunk_del(dev, chunk, 1, __LINE__);
-+ yaffs_skip_rest_of_block(dev);
-+ continue;
-+ }
-+ }
-+
-+ write_ok = yaffs_wr_chunk_tags_nand(dev, chunk, data, tags);
-+
-+ if (!bi->skip_erased_check)
-+ write_ok =
-+ yaffs_verify_chunk_written(dev, chunk, data, tags);
-+
-+ if (write_ok != YAFFS_OK) {
-+ /* Clean up aborted write, skip to next block and
-+ * try another chunk */
-+ yaffs_handle_chunk_wr_error(dev, chunk, erased_ok);
-+ continue;
-+ }
-+
-+ bi->skip_erased_check = 1;
-+
-+ /* Copy the data into the robustification buffer */
-+ yaffs_handle_chunk_wr_ok(dev, chunk, data, tags);
-+
-+ } while (write_ok != YAFFS_OK &&
-+ (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts));
-+
-+ if (!write_ok)
-+ chunk = -1;
-+
-+ if (attempts > 1) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "**>> yaffs write required %d attempts",
-+ attempts);
-+ dev->n_retried_writes += (attempts - 1);
-+ }
-+
-+ return chunk;
-+}
-+
-+/*
-+ * Block retiring for handling a broken block.
-+ */
-+
-+static void yaffs_retire_block(struct yaffs_dev *dev, int flash_block)
-+{
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, flash_block);
-+
-+ yaffs2_checkpt_invalidate(dev);
-+
-+ yaffs2_clear_oldest_dirty_seq(dev, bi);
-+
-+ if (yaffs_mark_bad(dev, flash_block) != YAFFS_OK) {
-+ if (yaffs_erase_block(dev, flash_block) != YAFFS_OK) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs: Failed to mark bad and erase block %d",
-+ flash_block);
-+ } else {
-+ struct yaffs_ext_tags tags;
-+ int chunk_id =
-+ flash_block * dev->param.chunks_per_block;
-+
-+ u8 *buffer = yaffs_get_temp_buffer(dev);
-+
-+ memset(buffer, 0xff, dev->data_bytes_per_chunk);
-+ memset(&tags, 0, sizeof(tags));
-+ tags.seq_number = YAFFS_SEQUENCE_BAD_BLOCK;
-+ if (dev->tagger.write_chunk_tags_fn(dev, chunk_id -
-+ dev->chunk_offset,
-+ buffer,
-+ &tags) != YAFFS_OK)
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs: Failed to write bad block marker to block %d",
-+ flash_block);
-+
-+ yaffs_release_temp_buffer(dev, buffer);
-+ }
-+ }
-+
-+ bi->block_state = YAFFS_BLOCK_STATE_DEAD;
-+ bi->gc_prioritise = 0;
-+ bi->needs_retiring = 0;
-+
-+ dev->n_retired_blocks++;
-+}
-+
-+/*---------------- Name handling functions ------------*/
-+
-+static u16 yaffs_calc_name_sum(const YCHAR *name)
-+{
-+ u16 sum = 0;
-+ u16 i = 1;
-+
-+ if (!name)
-+ return 0;
-+
-+ while ((*name) && i < (YAFFS_MAX_NAME_LENGTH / 2)) {
-+
-+ /* 0x1f mask is case insensitive */
-+ sum += ((*name) & 0x1f) * i;
-+ i++;
-+ name++;
-+ }
-+ return sum;
-+}
-+
-+
-+void yaffs_set_obj_name(struct yaffs_obj *obj, const YCHAR * name)
-+{
-+ memset(obj->short_name, 0, sizeof(obj->short_name));
-+
-+ if (name && !name[0]) {
-+ yaffs_fix_null_name(obj, obj->short_name,
-+ YAFFS_SHORT_NAME_LENGTH);
-+ name = obj->short_name;
-+ } else if (name &&
-+ strnlen(name, YAFFS_SHORT_NAME_LENGTH + 1) <=
-+ YAFFS_SHORT_NAME_LENGTH) {
-+ strcpy(obj->short_name, name);
-+ }
-+
-+ obj->sum = yaffs_calc_name_sum(name);
-+}
-+
-+void yaffs_set_obj_name_from_oh(struct yaffs_obj *obj,
-+ const struct yaffs_obj_hdr *oh)
-+{
-+#ifdef CONFIG_YAFFS_AUTO_UNICODE
-+ YCHAR tmp_name[YAFFS_MAX_NAME_LENGTH + 1];
-+ memset(tmp_name, 0, sizeof(tmp_name));
-+ yaffs_load_name_from_oh(obj->my_dev, tmp_name, oh->name,
-+ YAFFS_MAX_NAME_LENGTH + 1);
-+ yaffs_set_obj_name(obj, tmp_name);
-+#else
-+ yaffs_set_obj_name(obj, oh->name);
-+#endif
-+}
-+
-+loff_t yaffs_max_file_size(struct yaffs_dev *dev)
-+{
-+ if(sizeof(loff_t) < 8)
-+ return YAFFS_MAX_FILE_SIZE_32;
-+ else
-+ return ((loff_t) YAFFS_MAX_CHUNK_ID) * dev->data_bytes_per_chunk;
-+}
-+
-+/*-------------------- TNODES -------------------
-+
-+ * List of spare tnodes
-+ * The list is hooked together using the first pointer
-+ * in the tnode.
-+ */
-+
-+struct yaffs_tnode *yaffs_get_tnode(struct yaffs_dev *dev)
-+{
-+ struct yaffs_tnode *tn = yaffs_alloc_raw_tnode(dev);
-+
-+ if (tn) {
-+ memset(tn, 0, dev->tnode_size);
-+ dev->n_tnodes++;
-+ }
-+
-+ dev->checkpoint_blocks_required = 0; /* force recalculation */
-+
-+ return tn;
-+}
-+
-+/* FreeTnode frees up a tnode and puts it back on the free list */
-+static void yaffs_free_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn)
-+{
-+ yaffs_free_raw_tnode(dev, tn);
-+ dev->n_tnodes--;
-+ dev->checkpoint_blocks_required = 0; /* force recalculation */
-+}
-+
-+static void yaffs_deinit_tnodes_and_objs(struct yaffs_dev *dev)
-+{
-+ yaffs_deinit_raw_tnodes_and_objs(dev);
-+ dev->n_obj = 0;
-+ dev->n_tnodes = 0;
-+}
-+
-+static void yaffs_load_tnode_0(struct yaffs_dev *dev, struct yaffs_tnode *tn,
-+ unsigned pos, unsigned val)
-+{
-+ u32 *map = (u32 *) tn;
-+ u32 bit_in_map;
-+ u32 bit_in_word;
-+ u32 word_in_map;
-+ u32 mask;
-+
-+ pos &= YAFFS_TNODES_LEVEL0_MASK;
-+ val >>= dev->chunk_grp_bits;
-+
-+ bit_in_map = pos * dev->tnode_width;
-+ word_in_map = bit_in_map / 32;
-+ bit_in_word = bit_in_map & (32 - 1);
-+
-+ mask = dev->tnode_mask << bit_in_word;
-+
-+ map[word_in_map] &= ~mask;
-+ map[word_in_map] |= (mask & (val << bit_in_word));
-+
-+ if (dev->tnode_width > (32 - bit_in_word)) {
-+ bit_in_word = (32 - bit_in_word);
-+ word_in_map++;
-+ mask =
-+ dev->tnode_mask >> bit_in_word;
-+ map[word_in_map] &= ~mask;
-+ map[word_in_map] |= (mask & (val >> bit_in_word));
-+ }
-+}
-+
-+u32 yaffs_get_group_base(struct yaffs_dev *dev, struct yaffs_tnode *tn,
-+ unsigned pos)
-+{
-+ u32 *map = (u32 *) tn;
-+ u32 bit_in_map;
-+ u32 bit_in_word;
-+ u32 word_in_map;
-+ u32 val;
-+
-+ pos &= YAFFS_TNODES_LEVEL0_MASK;
-+
-+ bit_in_map = pos * dev->tnode_width;
-+ word_in_map = bit_in_map / 32;
-+ bit_in_word = bit_in_map & (32 - 1);
-+
-+ val = map[word_in_map] >> bit_in_word;
-+
-+ if (dev->tnode_width > (32 - bit_in_word)) {
-+ bit_in_word = (32 - bit_in_word);
-+ word_in_map++;
-+ val |= (map[word_in_map] << bit_in_word);
-+ }
-+
-+ val &= dev->tnode_mask;
-+ val <<= dev->chunk_grp_bits;
-+
-+ return val;
-+}
-+
-+/* ------------------- End of individual tnode manipulation -----------------*/
-+
-+/* ---------Functions to manipulate the look-up tree (made up of tnodes) ------
-+ * The look up tree is represented by the top tnode and the number of top_level
-+ * in the tree. 0 means only the level 0 tnode is in the tree.
-+ */
-+
-+/* FindLevel0Tnode finds the level 0 tnode, if one exists. */
-+struct yaffs_tnode *yaffs_find_tnode_0(struct yaffs_dev *dev,
-+ struct yaffs_file_var *file_struct,
-+ u32 chunk_id)
-+{
-+ struct yaffs_tnode *tn = file_struct->top;
-+ u32 i;
-+ int required_depth;
-+ int level = file_struct->top_level;
-+
-+ (void) dev;
-+
-+ /* Check sane level and chunk Id */
-+ if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL)
-+ return NULL;
-+
-+ if (chunk_id > YAFFS_MAX_CHUNK_ID)
-+ return NULL;
-+
-+ /* First check we're tall enough (ie enough top_level) */
-+
-+ i = chunk_id >> YAFFS_TNODES_LEVEL0_BITS;
-+ required_depth = 0;
-+ while (i) {
-+ i >>= YAFFS_TNODES_INTERNAL_BITS;
-+ required_depth++;
-+ }
-+
-+ if (required_depth > file_struct->top_level)
-+ return NULL; /* Not tall enough, so we can't find it */
-+
-+ /* Traverse down to level 0 */
-+ while (level > 0 && tn) {
-+ tn = tn->internal[(chunk_id >>
-+ (YAFFS_TNODES_LEVEL0_BITS +
-+ (level - 1) *
-+ YAFFS_TNODES_INTERNAL_BITS)) &
-+ YAFFS_TNODES_INTERNAL_MASK];
-+ level--;
-+ }
-+
-+ return tn;
-+}
-+
-+/* add_find_tnode_0 finds the level 0 tnode if it exists,
-+ * otherwise first expands the tree.
-+ * This happens in two steps:
-+ * 1. If the tree isn't tall enough, then make it taller.
-+ * 2. Scan down the tree towards the level 0 tnode adding tnodes if required.
-+ *
-+ * Used when modifying the tree.
-+ *
-+ * If the tn argument is NULL, then a fresh tnode will be added otherwise the
-+ * specified tn will be plugged into the ttree.
-+ */
-+
-+struct yaffs_tnode *yaffs_add_find_tnode_0(struct yaffs_dev *dev,
-+ struct yaffs_file_var *file_struct,
-+ u32 chunk_id,
-+ struct yaffs_tnode *passed_tn)
-+{
-+ int required_depth;
-+ int i;
-+ int l;
-+ struct yaffs_tnode *tn;
-+ u32 x;
-+
-+ /* Check sane level and page Id */
-+ if (file_struct->top_level < 0 ||
-+ file_struct->top_level > YAFFS_TNODES_MAX_LEVEL)
-+ return NULL;
-+
-+ if (chunk_id > YAFFS_MAX_CHUNK_ID)
-+ return NULL;
-+
-+ /* First check we're tall enough (ie enough top_level) */
-+
-+ x = chunk_id >> YAFFS_TNODES_LEVEL0_BITS;
-+ required_depth = 0;
-+ while (x) {
-+ x >>= YAFFS_TNODES_INTERNAL_BITS;
-+ required_depth++;
-+ }
-+
-+ if (required_depth > file_struct->top_level) {
-+ /* Not tall enough, gotta make the tree taller */
-+ for (i = file_struct->top_level; i < required_depth; i++) {
-+
-+ tn = yaffs_get_tnode(dev);
-+
-+ if (tn) {
-+ tn->internal[0] = file_struct->top;
-+ file_struct->top = tn;
-+ file_struct->top_level++;
-+ } else {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs: no more tnodes");
-+ return NULL;
-+ }
-+ }
-+ }
-+
-+ /* Traverse down to level 0, adding anything we need */
-+
-+ l = file_struct->top_level;
-+ tn = file_struct->top;
-+
-+ if (l > 0) {
-+ while (l > 0 && tn) {
-+ x = (chunk_id >>
-+ (YAFFS_TNODES_LEVEL0_BITS +
-+ (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) &
-+ YAFFS_TNODES_INTERNAL_MASK;
-+
-+ if ((l > 1) && !tn->internal[x]) {
-+ /* Add missing non-level-zero tnode */
-+ tn->internal[x] = yaffs_get_tnode(dev);
-+ if (!tn->internal[x])
-+ return NULL;
-+ } else if (l == 1) {
-+ /* Looking from level 1 at level 0 */
-+ if (passed_tn) {
-+ /* If we already have one, release it */
-+ if (tn->internal[x])
-+ yaffs_free_tnode(dev,
-+ tn->internal[x]);
-+ tn->internal[x] = passed_tn;
-+
-+ } else if (!tn->internal[x]) {
-+ /* Don't have one, none passed in */
-+ tn->internal[x] = yaffs_get_tnode(dev);
-+ if (!tn->internal[x])
-+ return NULL;
-+ }
-+ }
-+
-+ tn = tn->internal[x];
-+ l--;
-+ }
-+ } else {
-+ /* top is level 0 */
-+ if (passed_tn) {
-+ memcpy(tn, passed_tn,
-+ (dev->tnode_width * YAFFS_NTNODES_LEVEL0) / 8);
-+ yaffs_free_tnode(dev, passed_tn);
-+ }
-+ }
-+
-+ return tn;
-+}
-+
-+static int yaffs_tags_match(const struct yaffs_ext_tags *tags, int obj_id,
-+ int chunk_obj)
-+{
-+ return (tags->chunk_id == chunk_obj &&
-+ tags->obj_id == obj_id &&
-+ !tags->is_deleted) ? 1 : 0;
-+
-+}
-+
-+static int yaffs_find_chunk_in_group(struct yaffs_dev *dev, int the_chunk,
-+ struct yaffs_ext_tags *tags, int obj_id,
-+ int inode_chunk)
-+{
-+ int j;
-+
-+ for (j = 0; the_chunk && j < dev->chunk_grp_size; j++) {
-+ if (yaffs_check_chunk_bit
-+ (dev, the_chunk / dev->param.chunks_per_block,
-+ the_chunk % dev->param.chunks_per_block)) {
-+
-+ if (dev->chunk_grp_size == 1)
-+ return the_chunk;
-+ else {
-+ yaffs_rd_chunk_tags_nand(dev, the_chunk, NULL,
-+ tags);
-+ if (yaffs_tags_match(tags,
-+ obj_id, inode_chunk)) {
-+ /* found it; */
-+ return the_chunk;
-+ }
-+ }
-+ }
-+ the_chunk++;
-+ }
-+ return -1;
-+}
-+
-+int yaffs_find_chunk_in_file(struct yaffs_obj *in, int inode_chunk,
-+ struct yaffs_ext_tags *tags)
-+{
-+ /*Get the Tnode, then get the level 0 offset chunk offset */
-+ struct yaffs_tnode *tn;
-+ int the_chunk = -1;
-+ struct yaffs_ext_tags local_tags;
-+ int ret_val = -1;
-+ struct yaffs_dev *dev = in->my_dev;
-+
-+ if (!tags) {
-+ /* Passed a NULL, so use our own tags space */
-+ tags = &local_tags;
-+ }
-+
-+ tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk);
-+
-+ if (!tn)
-+ return ret_val;
-+
-+ the_chunk = yaffs_get_group_base(dev, tn, inode_chunk);
-+
-+ ret_val = yaffs_find_chunk_in_group(dev, the_chunk, tags, in->obj_id,
-+ inode_chunk);
-+ return ret_val;
-+}
-+
-+static int yaffs_find_del_file_chunk(struct yaffs_obj *in, int inode_chunk,
-+ struct yaffs_ext_tags *tags)
-+{
-+ /* Get the Tnode, then get the level 0 offset chunk offset */
-+ struct yaffs_tnode *tn;
-+ int the_chunk = -1;
-+ struct yaffs_ext_tags local_tags;
-+ struct yaffs_dev *dev = in->my_dev;
-+ int ret_val = -1;
-+
-+ if (!tags) {
-+ /* Passed a NULL, so use our own tags space */
-+ tags = &local_tags;
-+ }
-+
-+ tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk);
-+
-+ if (!tn)
-+ return ret_val;
-+
-+ the_chunk = yaffs_get_group_base(dev, tn, inode_chunk);
-+
-+ ret_val = yaffs_find_chunk_in_group(dev, the_chunk, tags, in->obj_id,
-+ inode_chunk);
-+
-+ /* Delete the entry in the filestructure (if found) */
-+ if (ret_val != -1)
-+ yaffs_load_tnode_0(dev, tn, inode_chunk, 0);
-+
-+ return ret_val;
-+}
-+
-+int yaffs_put_chunk_in_file(struct yaffs_obj *in, int inode_chunk,
-+ int nand_chunk, int in_scan)
-+{
-+ /* NB in_scan is zero unless scanning.
-+ * For forward scanning, in_scan is > 0;
-+ * for backward scanning in_scan is < 0
-+ *
-+ * nand_chunk = 0 is a dummy insert to make sure the tnodes are there.
-+ */
-+
-+ struct yaffs_tnode *tn;
-+ struct yaffs_dev *dev = in->my_dev;
-+ int existing_cunk;
-+ struct yaffs_ext_tags existing_tags;
-+ struct yaffs_ext_tags new_tags;
-+ unsigned existing_serial, new_serial;
-+
-+ if (in->variant_type != YAFFS_OBJECT_TYPE_FILE) {
-+ /* Just ignore an attempt at putting a chunk into a non-file
-+ * during scanning.
-+ * If it is not during Scanning then something went wrong!
-+ */
-+ if (!in_scan) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs tragedy:attempt to put data chunk into a non-file"
-+ );
-+ BUG();
-+ }
-+
-+ yaffs_chunk_del(dev, nand_chunk, 1, __LINE__);
-+ return YAFFS_OK;
-+ }
-+
-+ tn = yaffs_add_find_tnode_0(dev,
-+ &in->variant.file_variant,
-+ inode_chunk, NULL);
-+ if (!tn)
-+ return YAFFS_FAIL;
-+
-+ if (!nand_chunk)
-+ /* Dummy insert, bail now */
-+ return YAFFS_OK;
-+
-+ existing_cunk = yaffs_get_group_base(dev, tn, inode_chunk);
-+
-+ if (in_scan != 0) {
-+ /* If we're scanning then we need to test for duplicates
-+ * NB This does not need to be efficient since it should only
-+ * happen when the power fails during a write, then only one
-+ * chunk should ever be affected.
-+ *
-+ * Correction for YAFFS2: This could happen quite a lot and we
-+ * need to think about efficiency! TODO
-+ * Update: For backward scanning we don't need to re-read tags
-+ * so this is quite cheap.
-+ */
-+
-+ if (existing_cunk > 0) {
-+ /* NB Right now existing chunk will not be real
-+ * chunk_id if the chunk group size > 1
-+ * thus we have to do a FindChunkInFile to get the
-+ * real chunk id.
-+ *
-+ * We have a duplicate now we need to decide which
-+ * one to use:
-+ *
-+ * Backwards scanning YAFFS2: The old one is what
-+ * we use, dump the new one.
-+ * YAFFS1: Get both sets of tags and compare serial
-+ * numbers.
-+ */
-+
-+ if (in_scan > 0) {
-+ /* Only do this for forward scanning */
-+ yaffs_rd_chunk_tags_nand(dev,
-+ nand_chunk,
-+ NULL, &new_tags);
-+
-+ /* Do a proper find */
-+ existing_cunk =
-+ yaffs_find_chunk_in_file(in, inode_chunk,
-+ &existing_tags);
-+ }
-+
-+ if (existing_cunk <= 0) {
-+ /*Hoosterman - how did this happen? */
-+
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs tragedy: existing chunk < 0 in scan"
-+ );
-+
-+ }
-+
-+ /* NB The deleted flags should be false, otherwise
-+ * the chunks will not be loaded during a scan
-+ */
-+
-+ if (in_scan > 0) {
-+ new_serial = new_tags.serial_number;
-+ existing_serial = existing_tags.serial_number;
-+ }
-+
-+ if ((in_scan > 0) &&
-+ (existing_cunk <= 0 ||
-+ ((existing_serial + 1) & 3) == new_serial)) {
-+ /* Forward scanning.
-+ * Use new
-+ * Delete the old one and drop through to
-+ * update the tnode
-+ */
-+ yaffs_chunk_del(dev, existing_cunk, 1,
-+ __LINE__);
-+ } else {
-+ /* Backward scanning or we want to use the
-+ * existing one
-+ * Delete the new one and return early so that
-+ * the tnode isn't changed
-+ */
-+ yaffs_chunk_del(dev, nand_chunk, 1, __LINE__);
-+ return YAFFS_OK;
-+ }
-+ }
-+
-+ }
-+
-+ if (existing_cunk == 0)
-+ in->n_data_chunks++;
-+
-+ yaffs_load_tnode_0(dev, tn, inode_chunk, nand_chunk);
-+
-+ return YAFFS_OK;
-+}
-+
-+static void yaffs_soft_del_chunk(struct yaffs_dev *dev, int chunk)
-+{
-+ struct yaffs_block_info *the_block;
-+ unsigned block_no;
-+
-+ yaffs_trace(YAFFS_TRACE_DELETION, "soft delete chunk %d", chunk);
-+
-+ block_no = chunk / dev->param.chunks_per_block;
-+ the_block = yaffs_get_block_info(dev, block_no);
-+ if (the_block) {
-+ the_block->soft_del_pages++;
-+ dev->n_free_chunks++;
-+ yaffs2_update_oldest_dirty_seq(dev, block_no, the_block);
-+ }
-+}
-+
-+/* SoftDeleteWorker scans backwards through the tnode tree and soft deletes all
-+ * the chunks in the file.
-+ * All soft deleting does is increment the block's softdelete count and pulls
-+ * the chunk out of the tnode.
-+ * Thus, essentially this is the same as DeleteWorker except that the chunks
-+ * are soft deleted.
-+ */
-+
-+static int yaffs_soft_del_worker(struct yaffs_obj *in, struct yaffs_tnode *tn,
-+ u32 level, int chunk_offset)
-+{
-+ int i;
-+ int the_chunk;
-+ int all_done = 1;
-+ struct yaffs_dev *dev = in->my_dev;
-+
-+ if (!tn)
-+ return 1;
-+
-+ if (level > 0) {
-+ for (i = YAFFS_NTNODES_INTERNAL - 1;
-+ all_done && i >= 0;
-+ i--) {
-+ if (tn->internal[i]) {
-+ all_done =
-+ yaffs_soft_del_worker(in,
-+ tn->internal[i],
-+ level - 1,
-+ (chunk_offset <<
-+ YAFFS_TNODES_INTERNAL_BITS)
-+ + i);
-+ if (all_done) {
-+ yaffs_free_tnode(dev,
-+ tn->internal[i]);
-+ tn->internal[i] = NULL;
-+ } else {
-+ /* Can this happen? */
-+ }
-+ }
-+ }
-+ return (all_done) ? 1 : 0;
-+ }
-+
-+ /* level 0 */
-+ for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) {
-+ the_chunk = yaffs_get_group_base(dev, tn, i);
-+ if (the_chunk) {
-+ yaffs_soft_del_chunk(dev, the_chunk);
-+ yaffs_load_tnode_0(dev, tn, i, 0);
-+ }
-+ }
-+ return 1;
-+}
-+
-+static void yaffs_remove_obj_from_dir(struct yaffs_obj *obj)
-+{
-+ struct yaffs_dev *dev = obj->my_dev;
-+ struct yaffs_obj *parent;
-+
-+ yaffs_verify_obj_in_dir(obj);
-+ parent = obj->parent;
-+
-+ yaffs_verify_dir(parent);
-+
-+ if (dev && dev->param.remove_obj_fn)
-+ dev->param.remove_obj_fn(obj);
-+
-+ list_del_init(&obj->siblings);
-+ obj->parent = NULL;
-+
-+ yaffs_verify_dir(parent);
-+}
-+
-+void yaffs_add_obj_to_dir(struct yaffs_obj *directory, struct yaffs_obj *obj)
-+{
-+ if (!directory) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "tragedy: Trying to add an object to a null pointer directory"
-+ );
-+ BUG();
-+ return;
-+ }
-+ if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "tragedy: Trying to add an object to a non-directory"
-+ );
-+ BUG();
-+ }
-+
-+ if (obj->siblings.prev == NULL) {
-+ /* Not initialised */
-+ BUG();
-+ }
-+
-+ yaffs_verify_dir(directory);
-+
-+ yaffs_remove_obj_from_dir(obj);
-+
-+ /* Now add it */
-+ list_add(&obj->siblings, &directory->variant.dir_variant.children);
-+ obj->parent = directory;
-+
-+ if (directory == obj->my_dev->unlinked_dir
-+ || directory == obj->my_dev->del_dir) {
-+ obj->unlinked = 1;
-+ obj->my_dev->n_unlinked_files++;
-+ obj->rename_allowed = 0;
-+ }
-+
-+ yaffs_verify_dir(directory);
-+ yaffs_verify_obj_in_dir(obj);
-+}
-+
-+static int yaffs_change_obj_name(struct yaffs_obj *obj,
-+ struct yaffs_obj *new_dir,
-+ const YCHAR *new_name, int force, int shadows)
-+{
-+ int unlink_op;
-+ int del_op;
-+ struct yaffs_obj *existing_target;
-+
-+ if (new_dir == NULL)
-+ new_dir = obj->parent; /* use the old directory */
-+
-+ if (new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "tragedy: yaffs_change_obj_name: new_dir is not a directory"
-+ );
-+ BUG();
-+ }
-+
-+ unlink_op = (new_dir == obj->my_dev->unlinked_dir);
-+ del_op = (new_dir == obj->my_dev->del_dir);
-+
-+ existing_target = yaffs_find_by_name(new_dir, new_name);
-+
-+ /* If the object is a file going into the unlinked directory,
-+ * then it is OK to just stuff it in since duplicate names are OK.
-+ * else only proceed if the new name does not exist and we're putting
-+ * it into a directory.
-+ */
-+ if (!(unlink_op || del_op || force ||
-+ shadows > 0 || !existing_target) ||
-+ new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
-+ return YAFFS_FAIL;
-+
-+ yaffs_set_obj_name(obj, new_name);
-+ obj->dirty = 1;
-+ yaffs_add_obj_to_dir(new_dir, obj);
-+
-+ if (unlink_op)
-+ obj->unlinked = 1;
-+
-+ /* If it is a deletion then we mark it as a shrink for gc */
-+ if (yaffs_update_oh(obj, new_name, 0, del_op, shadows, NULL) >= 0)
-+ return YAFFS_OK;
-+
-+ return YAFFS_FAIL;
-+}
-+
-+/*------------------------ Short Operations Cache ------------------------------
-+ * In many situations where there is no high level buffering a lot of
-+ * reads might be short sequential reads, and a lot of writes may be short
-+ * sequential writes. eg. scanning/writing a jpeg file.
-+ * In these cases, a short read/write cache can provide a huge perfomance
-+ * benefit with dumb-as-a-rock code.
-+ * In Linux, the page cache provides read buffering and the short op cache
-+ * provides write buffering.
-+ *
-+ * There are a small number (~10) of cache chunks per device so that we don't
-+ * need a very intelligent search.
-+ */
-+
-+static int yaffs_obj_cache_dirty(struct yaffs_obj *obj)
-+{
-+ struct yaffs_dev *dev = obj->my_dev;
-+ int i;
-+ struct yaffs_cache *cache;
-+ int n_caches = obj->my_dev->param.n_caches;
-+
-+ for (i = 0; i < n_caches; i++) {
-+ cache = &dev->cache[i];
-+ if (cache->object == obj && cache->dirty)
-+ return 1;
-+ }
-+
-+ return 0;
-+}
-+
-+static void yaffs_flush_file_cache(struct yaffs_obj *obj)
-+{
-+ struct yaffs_dev *dev = obj->my_dev;
-+ int lowest = -99; /* Stop compiler whining. */
-+ int i;
-+ struct yaffs_cache *cache;
-+ int chunk_written = 0;
-+ int n_caches = obj->my_dev->param.n_caches;
-+
-+ if (n_caches < 1)
-+ return;
-+ do {
-+ cache = NULL;
-+
-+ /* Find the lowest dirty chunk for this object */
-+ for (i = 0; i < n_caches; i++) {
-+ if (dev->cache[i].object == obj &&
-+ dev->cache[i].dirty) {
-+ if (!cache ||
-+ dev->cache[i].chunk_id < lowest) {
-+ cache = &dev->cache[i];
-+ lowest = cache->chunk_id;
-+ }
-+ }
-+ }
-+
-+ if (cache && !cache->locked) {
-+ /* Write it out and free it up */
-+ chunk_written =
-+ yaffs_wr_data_obj(cache->object,
-+ cache->chunk_id,
-+ cache->data,
-+ cache->n_bytes, 1);
-+ cache->dirty = 0;
-+ cache->object = NULL;
-+ }
-+ } while (cache && chunk_written > 0);
-+
-+ if (cache)
-+ /* Hoosterman, disk full while writing cache out. */
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs tragedy: no space during cache write");
-+}
-+
-+/*yaffs_flush_whole_cache(dev)
-+ *
-+ *
-+ */
-+
-+void yaffs_flush_whole_cache(struct yaffs_dev *dev)
-+{
-+ struct yaffs_obj *obj;
-+ int n_caches = dev->param.n_caches;
-+ int i;
-+
-+ /* Find a dirty object in the cache and flush it...
-+ * until there are no further dirty objects.
-+ */
-+ do {
-+ obj = NULL;
-+ for (i = 0; i < n_caches && !obj; i++) {
-+ if (dev->cache[i].object && dev->cache[i].dirty)
-+ obj = dev->cache[i].object;
-+ }
-+ if (obj)
-+ yaffs_flush_file_cache(obj);
-+ } while (obj);
-+
-+}
-+
-+/* Grab us a cache chunk for use.
-+ * First look for an empty one.
-+ * Then look for the least recently used non-dirty one.
-+ * Then look for the least recently used dirty one...., flush and look again.
-+ */
-+static struct yaffs_cache *yaffs_grab_chunk_worker(struct yaffs_dev *dev)
-+{
-+ int i;
-+
-+ if (dev->param.n_caches > 0) {
-+ for (i = 0; i < dev->param.n_caches; i++) {
-+ if (!dev->cache[i].object)
-+ return &dev->cache[i];
-+ }
-+ }
-+ return NULL;
-+}
-+
-+static struct yaffs_cache *yaffs_grab_chunk_cache(struct yaffs_dev *dev)
-+{
-+ struct yaffs_cache *cache;
-+ struct yaffs_obj *the_obj;
-+ int usage;
-+ int i;
-+ int pushout;
-+
-+ if (dev->param.n_caches < 1)
-+ return NULL;
-+
-+ /* Try find a non-dirty one... */
-+
-+ cache = yaffs_grab_chunk_worker(dev);
-+
-+ if (!cache) {
-+ /* They were all dirty, find the LRU object and flush
-+ * its cache, then find again.
-+ * NB what's here is not very accurate,
-+ * we actually flush the object with the LRU chunk.
-+ */
-+
-+ /* With locking we can't assume we can use entry zero,
-+ * Set the_obj to a valid pointer for Coverity. */
-+ the_obj = dev->cache[0].object;
-+ usage = -1;
-+ cache = NULL;
-+ pushout = -1;
-+
-+ for (i = 0; i < dev->param.n_caches; i++) {
-+ if (dev->cache[i].object &&
-+ !dev->cache[i].locked &&
-+ (dev->cache[i].last_use < usage ||
-+ !cache)) {
-+ usage = dev->cache[i].last_use;
-+ the_obj = dev->cache[i].object;
-+ cache = &dev->cache[i];
-+ pushout = i;
-+ }
-+ }
-+
-+ if (!cache || cache->dirty) {
-+ /* Flush and try again */
-+ yaffs_flush_file_cache(the_obj);
-+ cache = yaffs_grab_chunk_worker(dev);
-+ }
-+ }
-+ return cache;
-+}
-+
-+/* Find a cached chunk */
-+static struct yaffs_cache *yaffs_find_chunk_cache(const struct yaffs_obj *obj,
-+ int chunk_id)
-+{
-+ struct yaffs_dev *dev = obj->my_dev;
-+ int i;
-+
-+ if (dev->param.n_caches < 1)
-+ return NULL;
-+
-+ for (i = 0; i < dev->param.n_caches; i++) {
-+ if (dev->cache[i].object == obj &&
-+ dev->cache[i].chunk_id == chunk_id) {
-+ dev->cache_hits++;
-+
-+ return &dev->cache[i];
-+ }
-+ }
-+ return NULL;
-+}
-+
-+/* Mark the chunk for the least recently used algorithym */
-+static void yaffs_use_cache(struct yaffs_dev *dev, struct yaffs_cache *cache,
-+ int is_write)
-+{
-+ int i;
-+
-+ if (dev->param.n_caches < 1)
-+ return;
-+
-+ if (dev->cache_last_use < 0 ||
-+ dev->cache_last_use > 100000000) {
-+ /* Reset the cache usages */
-+ for (i = 1; i < dev->param.n_caches; i++)
-+ dev->cache[i].last_use = 0;
-+
-+ dev->cache_last_use = 0;
-+ }
-+ dev->cache_last_use++;
-+ cache->last_use = dev->cache_last_use;
-+
-+ if (is_write)
-+ cache->dirty = 1;
-+}
-+
-+/* Invalidate a single cache page.
-+ * Do this when a whole page gets written,
-+ * ie the short cache for this page is no longer valid.
-+ */
-+static void yaffs_invalidate_chunk_cache(struct yaffs_obj *object, int chunk_id)
-+{
-+ struct yaffs_cache *cache;
-+
-+ if (object->my_dev->param.n_caches > 0) {
-+ cache = yaffs_find_chunk_cache(object, chunk_id);
-+
-+ if (cache)
-+ cache->object = NULL;
-+ }
-+}
-+
-+/* Invalidate all the cache pages associated with this object
-+ * Do this whenever ther file is deleted or resized.
-+ */
-+static void yaffs_invalidate_whole_cache(struct yaffs_obj *in)
-+{
-+ int i;
-+ struct yaffs_dev *dev = in->my_dev;
-+
-+ if (dev->param.n_caches > 0) {
-+ /* Invalidate it. */
-+ for (i = 0; i < dev->param.n_caches; i++) {
-+ if (dev->cache[i].object == in)
-+ dev->cache[i].object = NULL;
-+ }
-+ }
-+}
-+
-+static void yaffs_unhash_obj(struct yaffs_obj *obj)
-+{
-+ int bucket;
-+ struct yaffs_dev *dev = obj->my_dev;
-+
-+ /* If it is still linked into the bucket list, free from the list */
-+ if (!list_empty(&obj->hash_link)) {
-+ list_del_init(&obj->hash_link);
-+ bucket = yaffs_hash_fn(obj->obj_id);
-+ dev->obj_bucket[bucket].count--;
-+ }
-+}
-+
-+/* FreeObject frees up a Object and puts it back on the free list */
-+static void yaffs_free_obj(struct yaffs_obj *obj)
-+{
-+ struct yaffs_dev *dev;
-+
-+ if (!obj) {
-+ BUG();
-+ return;
-+ }
-+ dev = obj->my_dev;
-+ yaffs_trace(YAFFS_TRACE_OS, "FreeObject %p inode %p",
-+ obj, obj->my_inode);
-+ if (obj->parent)
-+ BUG();
-+ if (!list_empty(&obj->siblings))
-+ BUG();
-+
-+ if (obj->my_inode) {
-+ /* We're still hooked up to a cached inode.
-+ * Don't delete now, but mark for later deletion
-+ */
-+ obj->defered_free = 1;
-+ return;
-+ }
-+
-+ yaffs_unhash_obj(obj);
-+
-+ yaffs_free_raw_obj(dev, obj);
-+ dev->n_obj--;
-+ dev->checkpoint_blocks_required = 0; /* force recalculation */
-+}
-+
-+void yaffs_handle_defered_free(struct yaffs_obj *obj)
-+{
-+ if (obj->defered_free)
-+ yaffs_free_obj(obj);
-+}
-+
-+static int yaffs_generic_obj_del(struct yaffs_obj *in)
-+{
-+ /* Iinvalidate the file's data in the cache, without flushing. */
-+ yaffs_invalidate_whole_cache(in);
-+
-+ if (in->my_dev->param.is_yaffs2 && in->parent != in->my_dev->del_dir) {
-+ /* Move to unlinked directory so we have a deletion record */
-+ yaffs_change_obj_name(in, in->my_dev->del_dir, _Y("deleted"), 0,
-+ 0);
-+ }
-+
-+ yaffs_remove_obj_from_dir(in);
-+ yaffs_chunk_del(in->my_dev, in->hdr_chunk, 1, __LINE__);
-+ in->hdr_chunk = 0;
-+
-+ yaffs_free_obj(in);
-+ return YAFFS_OK;
-+
-+}
-+
-+static void yaffs_soft_del_file(struct yaffs_obj *obj)
-+{
-+ if (!obj->deleted ||
-+ obj->variant_type != YAFFS_OBJECT_TYPE_FILE ||
-+ obj->soft_del)
-+ return;
-+
-+ if (obj->n_data_chunks <= 0) {
-+ /* Empty file with no duplicate object headers,
-+ * just delete it immediately */
-+ yaffs_free_tnode(obj->my_dev, obj->variant.file_variant.top);
-+ obj->variant.file_variant.top = NULL;
-+ yaffs_trace(YAFFS_TRACE_TRACING,
-+ "yaffs: Deleting empty file %d",
-+ obj->obj_id);
-+ yaffs_generic_obj_del(obj);
-+ } else {
-+ yaffs_soft_del_worker(obj,
-+ obj->variant.file_variant.top,
-+ obj->variant.
-+ file_variant.top_level, 0);
-+ obj->soft_del = 1;
-+ }
-+}
-+
-+/* Pruning removes any part of the file structure tree that is beyond the
-+ * bounds of the file (ie that does not point to chunks).
-+ *
-+ * A file should only get pruned when its size is reduced.
-+ *
-+ * Before pruning, the chunks must be pulled from the tree and the
-+ * level 0 tnode entries must be zeroed out.
-+ * Could also use this for file deletion, but that's probably better handled
-+ * by a special case.
-+ *
-+ * This function is recursive. For levels > 0 the function is called again on
-+ * any sub-tree. For level == 0 we just check if the sub-tree has data.
-+ * If there is no data in a subtree then it is pruned.
-+ */
-+
-+static struct yaffs_tnode *yaffs_prune_worker(struct yaffs_dev *dev,
-+ struct yaffs_tnode *tn, u32 level,
-+ int del0)
-+{
-+ int i;
-+ int has_data;
-+
-+ if (!tn)
-+ return tn;
-+
-+ has_data = 0;
-+
-+ if (level > 0) {
-+ for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) {
-+ if (tn->internal[i]) {
-+ tn->internal[i] =
-+ yaffs_prune_worker(dev,
-+ tn->internal[i],
-+ level - 1,
-+ (i == 0) ? del0 : 1);
-+ }
-+
-+ if (tn->internal[i])
-+ has_data++;
-+ }
-+ } else {
-+ int tnode_size_u32 = dev->tnode_size / sizeof(u32);
-+ u32 *map = (u32 *) tn;
-+
-+ for (i = 0; !has_data && i < tnode_size_u32; i++) {
-+ if (map[i])
-+ has_data++;
-+ }
-+ }
-+
-+ if (has_data == 0 && del0) {
-+ /* Free and return NULL */
-+ yaffs_free_tnode(dev, tn);
-+ tn = NULL;
-+ }
-+ return tn;
-+}
-+
-+static int yaffs_prune_tree(struct yaffs_dev *dev,
-+ struct yaffs_file_var *file_struct)
-+{
-+ int i;
-+ int has_data;
-+ int done = 0;
-+ struct yaffs_tnode *tn;
-+
-+ if (file_struct->top_level < 1)
-+ return YAFFS_OK;
-+
-+ file_struct->top =
-+ yaffs_prune_worker(dev, file_struct->top, file_struct->top_level, 0);
-+
-+ /* Now we have a tree with all the non-zero branches NULL but
-+ * the height is the same as it was.
-+ * Let's see if we can trim internal tnodes to shorten the tree.
-+ * We can do this if only the 0th element in the tnode is in use
-+ * (ie all the non-zero are NULL)
-+ */
-+
-+ while (file_struct->top_level && !done) {
-+ tn = file_struct->top;
-+
-+ has_data = 0;
-+ for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) {
-+ if (tn->internal[i])
-+ has_data++;
-+ }
-+
-+ if (!has_data) {
-+ file_struct->top = tn->internal[0];
-+ file_struct->top_level--;
-+ yaffs_free_tnode(dev, tn);
-+ } else {
-+ done = 1;
-+ }
-+ }
-+
-+ return YAFFS_OK;
-+}
-+
-+/*-------------------- End of File Structure functions.-------------------*/
-+
-+/* alloc_empty_obj gets us a clean Object.*/
-+static struct yaffs_obj *yaffs_alloc_empty_obj(struct yaffs_dev *dev)
-+{
-+ struct yaffs_obj *obj = yaffs_alloc_raw_obj(dev);
-+
-+ if (!obj)
-+ return obj;
-+
-+ dev->n_obj++;
-+
-+ /* Now sweeten it up... */
-+
-+ memset(obj, 0, sizeof(struct yaffs_obj));
-+ obj->being_created = 1;
-+
-+ obj->my_dev = dev;
-+ obj->hdr_chunk = 0;
-+ obj->variant_type = YAFFS_OBJECT_TYPE_UNKNOWN;
-+ INIT_LIST_HEAD(&(obj->hard_links));
-+ INIT_LIST_HEAD(&(obj->hash_link));
-+ INIT_LIST_HEAD(&obj->siblings);
-+
-+ /* Now make the directory sane */
-+ if (dev->root_dir) {
-+ obj->parent = dev->root_dir;
-+ list_add(&(obj->siblings),
-+ &dev->root_dir->variant.dir_variant.children);
-+ }
-+
-+ /* Add it to the lost and found directory.
-+ * NB Can't put root or lost-n-found in lost-n-found so
-+ * check if lost-n-found exists first
-+ */
-+ if (dev->lost_n_found)
-+ yaffs_add_obj_to_dir(dev->lost_n_found, obj);
-+
-+ obj->being_created = 0;
-+
-+ dev->checkpoint_blocks_required = 0; /* force recalculation */
-+
-+ return obj;
-+}
-+
-+static int yaffs_find_nice_bucket(struct yaffs_dev *dev)
-+{
-+ int i;
-+ int l = 999;
-+ int lowest = 999999;
-+
-+ /* Search for the shortest list or one that
-+ * isn't too long.
-+ */
-+
-+ for (i = 0; i < 10 && lowest > 4; i++) {
-+ dev->bucket_finder++;
-+ dev->bucket_finder %= YAFFS_NOBJECT_BUCKETS;
-+ if (dev->obj_bucket[dev->bucket_finder].count < lowest) {
-+ lowest = dev->obj_bucket[dev->bucket_finder].count;
-+ l = dev->bucket_finder;
-+ }
-+ }
-+
-+ return l;
-+}
-+
-+static int yaffs_new_obj_id(struct yaffs_dev *dev)
-+{
-+ int bucket = yaffs_find_nice_bucket(dev);
-+ int found = 0;
-+ struct list_head *i;
-+ u32 n = (u32) bucket;
-+
-+ /* Now find an object value that has not already been taken
-+ * by scanning the list.
-+ */
-+
-+ while (!found) {
-+ found = 1;
-+ n += YAFFS_NOBJECT_BUCKETS;
-+ if (1 || dev->obj_bucket[bucket].count > 0) {
-+ list_for_each(i, &dev->obj_bucket[bucket].list) {
-+ /* If there is already one in the list */
-+ if (i && list_entry(i, struct yaffs_obj,
-+ hash_link)->obj_id == n) {
-+ found = 0;
-+ }
-+ }
-+ }
-+ }
-+ return n;
-+}
-+
-+static void yaffs_hash_obj(struct yaffs_obj *in)
-+{
-+ int bucket = yaffs_hash_fn(in->obj_id);
-+ struct yaffs_dev *dev = in->my_dev;
-+
-+ list_add(&in->hash_link, &dev->obj_bucket[bucket].list);
-+ dev->obj_bucket[bucket].count++;
-+}
-+
-+struct yaffs_obj *yaffs_find_by_number(struct yaffs_dev *dev, u32 number)
-+{
-+ int bucket = yaffs_hash_fn(number);
-+ struct list_head *i;
-+ struct yaffs_obj *in;
-+
-+ list_for_each(i, &dev->obj_bucket[bucket].list) {
-+ /* Look if it is in the list */
-+ in = list_entry(i, struct yaffs_obj, hash_link);
-+ if (in->obj_id == number) {
-+ /* Don't show if it is defered free */
-+ if (in->defered_free)
-+ return NULL;
-+ return in;
-+ }
-+ }
-+
-+ return NULL;
-+}
-+
-+static struct yaffs_obj *yaffs_new_obj(struct yaffs_dev *dev, int number,
-+ enum yaffs_obj_type type)
-+{
-+ struct yaffs_obj *the_obj = NULL;
-+ struct yaffs_tnode *tn = NULL;
-+
-+ if (number < 0)
-+ number = yaffs_new_obj_id(dev);
-+
-+ if (type == YAFFS_OBJECT_TYPE_FILE) {
-+ tn = yaffs_get_tnode(dev);
-+ if (!tn)
-+ return NULL;
-+ }
-+
-+ the_obj = yaffs_alloc_empty_obj(dev);
-+ if (!the_obj) {
-+ if (tn)
-+ yaffs_free_tnode(dev, tn);
-+ return NULL;
-+ }
-+
-+ the_obj->fake = 0;
-+ the_obj->rename_allowed = 1;
-+ the_obj->unlink_allowed = 1;
-+ the_obj->obj_id = number;
-+ yaffs_hash_obj(the_obj);
-+ the_obj->variant_type = type;
-+ yaffs_load_current_time(the_obj, 1, 1);
-+
-+ switch (type) {
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ the_obj->variant.file_variant.file_size = 0;
-+ the_obj->variant.file_variant.scanned_size = 0;
-+ the_obj->variant.file_variant.shrink_size =
-+ yaffs_max_file_size(dev);
-+ the_obj->variant.file_variant.top_level = 0;
-+ the_obj->variant.file_variant.top = tn;
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ INIT_LIST_HEAD(&the_obj->variant.dir_variant.children);
-+ INIT_LIST_HEAD(&the_obj->variant.dir_variant.dirty);
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ /* No action required */
-+ break;
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ /* todo this should not happen */
-+ break;
-+ }
-+ return the_obj;
-+}
-+
-+static struct yaffs_obj *yaffs_create_fake_dir(struct yaffs_dev *dev,
-+ int number, u32 mode)
-+{
-+
-+ struct yaffs_obj *obj =
-+ yaffs_new_obj(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY);
-+
-+ if (!obj)
-+ return NULL;
-+
-+ obj->fake = 1; /* it is fake so it might not use NAND */
-+ obj->rename_allowed = 0;
-+ obj->unlink_allowed = 0;
-+ obj->deleted = 0;
-+ obj->unlinked = 0;
-+ obj->yst_mode = mode;
-+ obj->my_dev = dev;
-+ obj->hdr_chunk = 0; /* Not a valid chunk. */
-+ return obj;
-+
-+}
-+
-+
-+static void yaffs_init_tnodes_and_objs(struct yaffs_dev *dev)
-+{
-+ int i;
-+
-+ dev->n_obj = 0;
-+ dev->n_tnodes = 0;
-+ yaffs_init_raw_tnodes_and_objs(dev);
-+
-+ for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
-+ INIT_LIST_HEAD(&dev->obj_bucket[i].list);
-+ dev->obj_bucket[i].count = 0;
-+ }
-+}
-+
-+struct yaffs_obj *yaffs_find_or_create_by_number(struct yaffs_dev *dev,
-+ int number,
-+ enum yaffs_obj_type type)
-+{
-+ struct yaffs_obj *the_obj = NULL;
-+
-+ if (number > 0)
-+ the_obj = yaffs_find_by_number(dev, number);
-+
-+ if (!the_obj)
-+ the_obj = yaffs_new_obj(dev, number, type);
-+
-+ return the_obj;
-+
-+}
-+
-+YCHAR *yaffs_clone_str(const YCHAR *str)
-+{
-+ YCHAR *new_str = NULL;
-+ int len;
-+
-+ if (!str)
-+ str = _Y("");
-+
-+ len = strnlen(str, YAFFS_MAX_ALIAS_LENGTH);
-+ new_str = kmalloc((len + 1) * sizeof(YCHAR), GFP_NOFS);
-+ if (new_str) {
-+ strncpy(new_str, str, len);
-+ new_str[len] = 0;
-+ }
-+ return new_str;
-+
-+}
-+/*
-+ *yaffs_update_parent() handles fixing a directories mtime and ctime when a new
-+ * link (ie. name) is created or deleted in the directory.
-+ *
-+ * ie.
-+ * create dir/a : update dir's mtime/ctime
-+ * rm dir/a: update dir's mtime/ctime
-+ * modify dir/a: don't update dir's mtimme/ctime
-+ *
-+ * This can be handled immediately or defered. Defering helps reduce the number
-+ * of updates when many files in a directory are changed within a brief period.
-+ *
-+ * If the directory updating is defered then yaffs_update_dirty_dirs must be
-+ * called periodically.
-+ */
-+
-+static void yaffs_update_parent(struct yaffs_obj *obj)
-+{
-+ struct yaffs_dev *dev;
-+
-+ if (!obj)
-+ return;
-+ dev = obj->my_dev;
-+ obj->dirty = 1;
-+ yaffs_load_current_time(obj, 0, 1);
-+ if (dev->param.defered_dir_update) {
-+ struct list_head *link = &obj->variant.dir_variant.dirty;
-+
-+ if (list_empty(link)) {
-+ list_add(link, &dev->dirty_dirs);
-+ yaffs_trace(YAFFS_TRACE_BACKGROUND,
-+ "Added object %d to dirty directories",
-+ obj->obj_id);
-+ }
-+
-+ } else {
-+ yaffs_update_oh(obj, NULL, 0, 0, 0, NULL);
-+ }
-+}
-+
-+void yaffs_update_dirty_dirs(struct yaffs_dev *dev)
-+{
-+ struct list_head *link;
-+ struct yaffs_obj *obj;
-+ struct yaffs_dir_var *d_s;
-+ union yaffs_obj_var *o_v;
-+
-+ yaffs_trace(YAFFS_TRACE_BACKGROUND, "Update dirty directories");
-+
-+ while (!list_empty(&dev->dirty_dirs)) {
-+ link = dev->dirty_dirs.next;
-+ list_del_init(link);
-+
-+ d_s = list_entry(link, struct yaffs_dir_var, dirty);
-+ o_v = list_entry(d_s, union yaffs_obj_var, dir_variant);
-+ obj = list_entry(o_v, struct yaffs_obj, variant);
-+
-+ yaffs_trace(YAFFS_TRACE_BACKGROUND, "Update directory %d",
-+ obj->obj_id);
-+
-+ if (obj->dirty)
-+ yaffs_update_oh(obj, NULL, 0, 0, 0, NULL);
-+ }
-+}
-+
-+/*
-+ * Mknod (create) a new object.
-+ * equiv_obj only has meaning for a hard link;
-+ * alias_str only has meaning for a symlink.
-+ * rdev only has meaning for devices (a subset of special objects)
-+ */
-+
-+static struct yaffs_obj *yaffs_create_obj(enum yaffs_obj_type type,
-+ struct yaffs_obj *parent,
-+ const YCHAR *name,
-+ u32 mode,
-+ u32 uid,
-+ u32 gid,
-+ struct yaffs_obj *equiv_obj,
-+ const YCHAR *alias_str, u32 rdev)
-+{
-+ struct yaffs_obj *in;
-+ YCHAR *str = NULL;
-+ struct yaffs_dev *dev = parent->my_dev;
-+
-+ /* Check if the entry exists.
-+ * If it does then fail the call since we don't want a dup. */
-+ if (yaffs_find_by_name(parent, name))
-+ return NULL;
-+
-+ if (type == YAFFS_OBJECT_TYPE_SYMLINK) {
-+ str = yaffs_clone_str(alias_str);
-+ if (!str)
-+ return NULL;
-+ }
-+
-+ in = yaffs_new_obj(dev, -1, type);
-+
-+ if (!in) {
-+ kfree(str);
-+ return NULL;
-+ }
-+
-+ in->hdr_chunk = 0;
-+ in->valid = 1;
-+ in->variant_type = type;
-+
-+ in->yst_mode = mode;
-+
-+ yaffs_attribs_init(in, gid, uid, rdev);
-+
-+ in->n_data_chunks = 0;
-+
-+ yaffs_set_obj_name(in, name);
-+ in->dirty = 1;
-+
-+ yaffs_add_obj_to_dir(parent, in);
-+
-+ in->my_dev = parent->my_dev;
-+
-+ switch (type) {
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ in->variant.symlink_variant.alias = str;
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ in->variant.hardlink_variant.equiv_obj = equiv_obj;
-+ in->variant.hardlink_variant.equiv_id = equiv_obj->obj_id;
-+ list_add(&in->hard_links, &equiv_obj->hard_links);
-+ break;
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ /* do nothing */
-+ break;
-+ }
-+
-+ if (yaffs_update_oh(in, name, 0, 0, 0, NULL) < 0) {
-+ /* Could not create the object header, fail */
-+ yaffs_del_obj(in);
-+ in = NULL;
-+ }
-+
-+ if (in)
-+ yaffs_update_parent(parent);
-+
-+ return in;
-+}
-+
-+struct yaffs_obj *yaffs_create_file(struct yaffs_obj *parent,
-+ const YCHAR *name, u32 mode, u32 uid,
-+ u32 gid)
-+{
-+ return yaffs_create_obj(YAFFS_OBJECT_TYPE_FILE, parent, name, mode,
-+ uid, gid, NULL, NULL, 0);
-+}
-+
-+struct yaffs_obj *yaffs_create_dir(struct yaffs_obj *parent, const YCHAR *name,
-+ u32 mode, u32 uid, u32 gid)
-+{
-+ return yaffs_create_obj(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name,
-+ mode, uid, gid, NULL, NULL, 0);
-+}
-+
-+struct yaffs_obj *yaffs_create_special(struct yaffs_obj *parent,
-+ const YCHAR *name, u32 mode, u32 uid,
-+ u32 gid, u32 rdev)
-+{
-+ return yaffs_create_obj(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode,
-+ uid, gid, NULL, NULL, rdev);
-+}
-+
-+struct yaffs_obj *yaffs_create_symlink(struct yaffs_obj *parent,
-+ const YCHAR *name, u32 mode, u32 uid,
-+ u32 gid, const YCHAR *alias)
-+{
-+ return yaffs_create_obj(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode,
-+ uid, gid, NULL, alias, 0);
-+}
-+
-+/* yaffs_link_obj returns the object id of the equivalent object.*/
-+struct yaffs_obj *yaffs_link_obj(struct yaffs_obj *parent, const YCHAR * name,
-+ struct yaffs_obj *equiv_obj)
-+{
-+ /* Get the real object in case we were fed a hard link obj */
-+ equiv_obj = yaffs_get_equivalent_obj(equiv_obj);
-+
-+ if (yaffs_create_obj(YAFFS_OBJECT_TYPE_HARDLINK,
-+ parent, name, 0, 0, 0,
-+ equiv_obj, NULL, 0))
-+ return equiv_obj;
-+
-+ return NULL;
-+
-+}
-+
-+
-+
-+/*---------------------- Block Management and Page Allocation -------------*/
-+
-+static void yaffs_deinit_blocks(struct yaffs_dev *dev)
-+{
-+ if (dev->block_info_alt && dev->block_info)
-+ vfree(dev->block_info);
-+ else
-+ kfree(dev->block_info);
-+
-+ dev->block_info_alt = 0;
-+
-+ dev->block_info = NULL;
-+
-+ if (dev->chunk_bits_alt && dev->chunk_bits)
-+ vfree(dev->chunk_bits);
-+ else
-+ kfree(dev->chunk_bits);
-+ dev->chunk_bits_alt = 0;
-+ dev->chunk_bits = NULL;
-+}
-+
-+static int yaffs_init_blocks(struct yaffs_dev *dev)
-+{
-+ int n_blocks = dev->internal_end_block - dev->internal_start_block + 1;
-+
-+ dev->block_info = NULL;
-+ dev->chunk_bits = NULL;
-+ dev->alloc_block = -1; /* force it to get a new one */
-+
-+ /* If the first allocation strategy fails, thry the alternate one */
-+ dev->block_info =
-+ kmalloc(n_blocks * sizeof(struct yaffs_block_info), GFP_NOFS);
-+ if (!dev->block_info) {
-+ dev->block_info =
-+ vmalloc(n_blocks * sizeof(struct yaffs_block_info));
-+ dev->block_info_alt = 1;
-+ } else {
-+ dev->block_info_alt = 0;
-+ }
-+
-+ if (!dev->block_info)
-+ goto alloc_error;
-+
-+ /* Set up dynamic blockinfo stuff. Round up bytes. */
-+ dev->chunk_bit_stride = (dev->param.chunks_per_block + 7) / 8;
-+ dev->chunk_bits =
-+ kmalloc(dev->chunk_bit_stride * n_blocks, GFP_NOFS);
-+ if (!dev->chunk_bits) {
-+ dev->chunk_bits =
-+ vmalloc(dev->chunk_bit_stride * n_blocks);
-+ dev->chunk_bits_alt = 1;
-+ } else {
-+ dev->chunk_bits_alt = 0;
-+ }
-+ if (!dev->chunk_bits)
-+ goto alloc_error;
-+
-+
-+ memset(dev->block_info, 0, n_blocks * sizeof(struct yaffs_block_info));
-+ memset(dev->chunk_bits, 0, dev->chunk_bit_stride * n_blocks);
-+ return YAFFS_OK;
-+
-+alloc_error:
-+ yaffs_deinit_blocks(dev);
-+ return YAFFS_FAIL;
-+}
-+
-+
-+void yaffs_block_became_dirty(struct yaffs_dev *dev, int block_no)
-+{
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, block_no);
-+ int erased_ok = 0;
-+ int i;
-+
-+ /* If the block is still healthy erase it and mark as clean.
-+ * If the block has had a data failure, then retire it.
-+ */
-+
-+ yaffs_trace(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE,
-+ "yaffs_block_became_dirty block %d state %d %s",
-+ block_no, bi->block_state,
-+ (bi->needs_retiring) ? "needs retiring" : "");
-+
-+ yaffs2_clear_oldest_dirty_seq(dev, bi);
-+
-+ bi->block_state = YAFFS_BLOCK_STATE_DIRTY;
-+
-+ /* If this is the block being garbage collected then stop gc'ing */
-+ if (block_no == dev->gc_block)
-+ dev->gc_block = 0;
-+
-+ /* If this block is currently the best candidate for gc
-+ * then drop as a candidate */
-+ if (block_no == dev->gc_dirtiest) {
-+ dev->gc_dirtiest = 0;
-+ dev->gc_pages_in_use = 0;
-+ }
-+
-+ if (!bi->needs_retiring) {
-+ yaffs2_checkpt_invalidate(dev);
-+ erased_ok = yaffs_erase_block(dev, block_no);
-+ if (!erased_ok) {
-+ dev->n_erase_failures++;
-+ yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
-+ "**>> Erasure failed %d", block_no);
-+ }
-+ }
-+
-+ /* Verify erasure if needed */
-+ if (erased_ok &&
-+ ((yaffs_trace_mask & YAFFS_TRACE_ERASE) ||
-+ !yaffs_skip_verification(dev))) {
-+ for (i = 0; i < dev->param.chunks_per_block; i++) {
-+ if (!yaffs_check_chunk_erased(dev,
-+ block_no * dev->param.chunks_per_block + i)) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ ">>Block %d erasure supposedly OK, but chunk %d not erased",
-+ block_no, i);
-+ }
-+ }
-+ }
-+
-+ if (!erased_ok) {
-+ /* We lost a block of free space */
-+ dev->n_free_chunks -= dev->param.chunks_per_block;
-+ yaffs_retire_block(dev, block_no);
-+ yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
-+ "**>> Block %d retired", block_no);
-+ return;
-+ }
-+
-+ /* Clean it up... */
-+ bi->block_state = YAFFS_BLOCK_STATE_EMPTY;
-+ bi->seq_number = 0;
-+ dev->n_erased_blocks++;
-+ bi->pages_in_use = 0;
-+ bi->soft_del_pages = 0;
-+ bi->has_shrink_hdr = 0;
-+ bi->skip_erased_check = 1; /* Clean, so no need to check */
-+ bi->gc_prioritise = 0;
-+ bi->has_summary = 0;
-+
-+ yaffs_clear_chunk_bits(dev, block_no);
-+
-+ yaffs_trace(YAFFS_TRACE_ERASE, "Erased block %d", block_no);
-+}
-+
-+static inline int yaffs_gc_process_chunk(struct yaffs_dev *dev,
-+ struct yaffs_block_info *bi,
-+ int old_chunk, u8 *buffer)
-+{
-+ int new_chunk;
-+ int mark_flash = 1;
-+ struct yaffs_ext_tags tags;
-+ struct yaffs_obj *object;
-+ int matching_chunk;
-+ int ret_val = YAFFS_OK;
-+
-+ memset(&tags, 0, sizeof(tags));
-+ yaffs_rd_chunk_tags_nand(dev, old_chunk,
-+ buffer, &tags);
-+ object = yaffs_find_by_number(dev, tags.obj_id);
-+
-+ yaffs_trace(YAFFS_TRACE_GC_DETAIL,
-+ "Collecting chunk in block %d, %d %d %d ",
-+ dev->gc_chunk, tags.obj_id,
-+ tags.chunk_id, tags.n_bytes);
-+
-+ if (object && !yaffs_skip_verification(dev)) {
-+ if (tags.chunk_id == 0)
-+ matching_chunk =
-+ object->hdr_chunk;
-+ else if (object->soft_del)
-+ /* Defeat the test */
-+ matching_chunk = old_chunk;
-+ else
-+ matching_chunk =
-+ yaffs_find_chunk_in_file
-+ (object, tags.chunk_id,
-+ NULL);
-+
-+ if (old_chunk != matching_chunk)
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "gc: page in gc mismatch: %d %d %d %d",
-+ old_chunk,
-+ matching_chunk,
-+ tags.obj_id,
-+ tags.chunk_id);
-+ }
-+
-+ if (!object) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "page %d in gc has no object: %d %d %d ",
-+ old_chunk,
-+ tags.obj_id, tags.chunk_id,
-+ tags.n_bytes);
-+ }
-+
-+ if (object &&
-+ object->deleted &&
-+ object->soft_del && tags.chunk_id != 0) {
-+ /* Data chunk in a soft deleted file,
-+ * throw it away.
-+ * It's a soft deleted data chunk,
-+ * No need to copy this, just forget
-+ * about it and fix up the object.
-+ */
-+
-+ /* Free chunks already includes
-+ * softdeleted chunks, how ever this
-+ * chunk is going to soon be really
-+ * deleted which will increment free
-+ * chunks. We have to decrement free
-+ * chunks so this works out properly.
-+ */
-+ dev->n_free_chunks--;
-+ bi->soft_del_pages--;
-+
-+ object->n_data_chunks--;
-+ if (object->n_data_chunks <= 0) {
-+ /* remeber to clean up obj */
-+ dev->gc_cleanup_list[dev->n_clean_ups] = tags.obj_id;
-+ dev->n_clean_ups++;
-+ }
-+ mark_flash = 0;
-+ } else if (object) {
-+ /* It's either a data chunk in a live
-+ * file or an ObjectHeader, so we're
-+ * interested in it.
-+ * NB Need to keep the ObjectHeaders of
-+ * deleted files until the whole file
-+ * has been deleted off
-+ */
-+ tags.serial_number++;
-+ dev->n_gc_copies++;
-+
-+ if (tags.chunk_id == 0) {
-+ /* It is an object Id,
-+ * We need to nuke the
-+ * shrinkheader flags since its
-+ * work is done.
-+ * Also need to clean up
-+ * shadowing.
-+ */
-+ struct yaffs_obj_hdr *oh;
-+ oh = (struct yaffs_obj_hdr *) buffer;
-+
-+ oh->is_shrink = 0;
-+ tags.extra_is_shrink = 0;
-+ oh->shadows_obj = 0;
-+ oh->inband_shadowed_obj_id = 0;
-+ tags.extra_shadows = 0;
-+
-+ /* Update file size */
-+ if (object->variant_type == YAFFS_OBJECT_TYPE_FILE) {
-+ yaffs_oh_size_load(oh,
-+ object->variant.file_variant.file_size);
-+ tags.extra_file_size =
-+ object->variant.file_variant.file_size;
-+ }
-+
-+ yaffs_verify_oh(object, oh, &tags, 1);
-+ new_chunk =
-+ yaffs_write_new_chunk(dev, (u8 *) oh, &tags, 1);
-+ } else {
-+ new_chunk =
-+ yaffs_write_new_chunk(dev, buffer, &tags, 1);
-+ }
-+
-+ if (new_chunk < 0) {
-+ ret_val = YAFFS_FAIL;
-+ } else {
-+
-+ /* Now fix up the Tnodes etc. */
-+
-+ if (tags.chunk_id == 0) {
-+ /* It's a header */
-+ object->hdr_chunk = new_chunk;
-+ object->serial = tags.serial_number;
-+ } else {
-+ /* It's a data chunk */
-+ yaffs_put_chunk_in_file(object, tags.chunk_id,
-+ new_chunk, 0);
-+ }
-+ }
-+ }
-+ if (ret_val == YAFFS_OK)
-+ yaffs_chunk_del(dev, old_chunk, mark_flash, __LINE__);
-+ return ret_val;
-+}
-+
-+static int yaffs_gc_block(struct yaffs_dev *dev, int block, int whole_block)
-+{
-+ int old_chunk;
-+ int ret_val = YAFFS_OK;
-+ int i;
-+ int is_checkpt_block;
-+ int max_copies;
-+ int chunks_before = yaffs_get_erased_chunks(dev);
-+ int chunks_after;
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, block);
-+
-+ is_checkpt_block = (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT);
-+
-+ yaffs_trace(YAFFS_TRACE_TRACING,
-+ "Collecting block %d, in use %d, shrink %d, whole_block %d",
-+ block, bi->pages_in_use, bi->has_shrink_hdr,
-+ whole_block);
-+
-+ /*yaffs_verify_free_chunks(dev); */
-+
-+ if (bi->block_state == YAFFS_BLOCK_STATE_FULL)
-+ bi->block_state = YAFFS_BLOCK_STATE_COLLECTING;
-+
-+ bi->has_shrink_hdr = 0; /* clear the flag so that the block can erase */
-+
-+ dev->gc_disable = 1;
-+
-+ yaffs_summary_gc(dev, block);
-+
-+ if (is_checkpt_block || !yaffs_still_some_chunks(dev, block)) {
-+ yaffs_trace(YAFFS_TRACE_TRACING,
-+ "Collecting block %d that has no chunks in use",
-+ block);
-+ yaffs_block_became_dirty(dev, block);
-+ } else {
-+
-+ u8 *buffer = yaffs_get_temp_buffer(dev);
-+
-+ yaffs_verify_blk(dev, bi, block);
-+
-+ max_copies = (whole_block) ? dev->param.chunks_per_block : 5;
-+ old_chunk = block * dev->param.chunks_per_block + dev->gc_chunk;
-+
-+ for (/* init already done */ ;
-+ ret_val == YAFFS_OK &&
-+ dev->gc_chunk < dev->param.chunks_per_block &&
-+ (bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) &&
-+ max_copies > 0;
-+ dev->gc_chunk++, old_chunk++) {
-+ if (yaffs_check_chunk_bit(dev, block, dev->gc_chunk)) {
-+ /* Page is in use and might need to be copied */
-+ max_copies--;
-+ ret_val = yaffs_gc_process_chunk(dev, bi,
-+ old_chunk, buffer);
-+ }
-+ }
-+ yaffs_release_temp_buffer(dev, buffer);
-+ }
-+
-+ yaffs_verify_collected_blk(dev, bi, block);
-+
-+ if (bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) {
-+ /*
-+ * The gc did not complete. Set block state back to FULL
-+ * because checkpointing does not restore gc.
-+ */
-+ bi->block_state = YAFFS_BLOCK_STATE_FULL;
-+ } else {
-+ /* The gc completed. */
-+ /* Do any required cleanups */
-+ for (i = 0; i < dev->n_clean_ups; i++) {
-+ /* Time to delete the file too */
-+ struct yaffs_obj *object =
-+ yaffs_find_by_number(dev, dev->gc_cleanup_list[i]);
-+ if (object) {
-+ yaffs_free_tnode(dev,
-+ object->variant.file_variant.top);
-+ object->variant.file_variant.top = NULL;
-+ yaffs_trace(YAFFS_TRACE_GC,
-+ "yaffs: About to finally delete object %d",
-+ object->obj_id);
-+ yaffs_generic_obj_del(object);
-+ object->my_dev->n_deleted_files--;
-+ }
-+
-+ }
-+ chunks_after = yaffs_get_erased_chunks(dev);
-+ if (chunks_before >= chunks_after)
-+ yaffs_trace(YAFFS_TRACE_GC,
-+ "gc did not increase free chunks before %d after %d",
-+ chunks_before, chunks_after);
-+ dev->gc_block = 0;
-+ dev->gc_chunk = 0;
-+ dev->n_clean_ups = 0;
-+ }
-+
-+ dev->gc_disable = 0;
-+
-+ return ret_val;
-+}
-+
-+/*
-+ * find_gc_block() selects the dirtiest block (or close enough)
-+ * for garbage collection.
-+ */
-+
-+static unsigned yaffs_find_gc_block(struct yaffs_dev *dev,
-+ int aggressive, int background)
-+{
-+ int i;
-+ int iterations;
-+ unsigned selected = 0;
-+ int prioritised = 0;
-+ int prioritised_exist = 0;
-+ struct yaffs_block_info *bi;
-+ int threshold;
-+
-+ /* First let's see if we need to grab a prioritised block */
-+ if (dev->has_pending_prioritised_gc && !aggressive) {
-+ dev->gc_dirtiest = 0;
-+ bi = dev->block_info;
-+ for (i = dev->internal_start_block;
-+ i <= dev->internal_end_block && !selected; i++) {
-+
-+ if (bi->gc_prioritise) {
-+ prioritised_exist = 1;
-+ if (bi->block_state == YAFFS_BLOCK_STATE_FULL &&
-+ yaffs_block_ok_for_gc(dev, bi)) {
-+ selected = i;
-+ prioritised = 1;
-+ }
-+ }
-+ bi++;
-+ }
-+
-+ /*
-+ * If there is a prioritised block and none was selected then
-+ * this happened because there is at least one old dirty block
-+ * gumming up the works. Let's gc the oldest dirty block.
-+ */
-+
-+ if (prioritised_exist &&
-+ !selected && dev->oldest_dirty_block > 0)
-+ selected = dev->oldest_dirty_block;
-+
-+ if (!prioritised_exist) /* None found, so we can clear this */
-+ dev->has_pending_prioritised_gc = 0;
-+ }
-+
-+ /* If we're doing aggressive GC then we are happy to take a less-dirty
-+ * block, and search harder.
-+ * else (leasurely gc), then we only bother to do this if the
-+ * block has only a few pages in use.
-+ */
-+
-+ if (!selected) {
-+ int pages_used;
-+ int n_blocks =
-+ dev->internal_end_block - dev->internal_start_block + 1;
-+ if (aggressive) {
-+ threshold = dev->param.chunks_per_block;
-+ iterations = n_blocks;
-+ } else {
-+ int max_threshold;
-+
-+ if (background)
-+ max_threshold = dev->param.chunks_per_block / 2;
-+ else
-+ max_threshold = dev->param.chunks_per_block / 8;
-+
-+ if (max_threshold < YAFFS_GC_PASSIVE_THRESHOLD)
-+ max_threshold = YAFFS_GC_PASSIVE_THRESHOLD;
-+
-+ threshold = background ? (dev->gc_not_done + 2) * 2 : 0;
-+ if (threshold < YAFFS_GC_PASSIVE_THRESHOLD)
-+ threshold = YAFFS_GC_PASSIVE_THRESHOLD;
-+ if (threshold > max_threshold)
-+ threshold = max_threshold;
-+
-+ iterations = n_blocks / 16 + 1;
-+ if (iterations > 100)
-+ iterations = 100;
-+ }
-+
-+ for (i = 0;
-+ i < iterations &&
-+ (dev->gc_dirtiest < 1 ||
-+ dev->gc_pages_in_use > YAFFS_GC_GOOD_ENOUGH);
-+ i++) {
-+ dev->gc_block_finder++;
-+ if (dev->gc_block_finder < dev->internal_start_block ||
-+ dev->gc_block_finder > dev->internal_end_block)
-+ dev->gc_block_finder =
-+ dev->internal_start_block;
-+
-+ bi = yaffs_get_block_info(dev, dev->gc_block_finder);
-+
-+ pages_used = bi->pages_in_use - bi->soft_del_pages;
-+
-+ if (bi->block_state == YAFFS_BLOCK_STATE_FULL &&
-+ pages_used < dev->param.chunks_per_block &&
-+ (dev->gc_dirtiest < 1 ||
-+ pages_used < dev->gc_pages_in_use) &&
-+ yaffs_block_ok_for_gc(dev, bi)) {
-+ dev->gc_dirtiest = dev->gc_block_finder;
-+ dev->gc_pages_in_use = pages_used;
-+ }
-+ }
-+
-+ if (dev->gc_dirtiest > 0 && dev->gc_pages_in_use <= threshold)
-+ selected = dev->gc_dirtiest;
-+ }
-+
-+ /*
-+ * If nothing has been selected for a while, try the oldest dirty
-+ * because that's gumming up the works.
-+ */
-+
-+ if (!selected && dev->param.is_yaffs2 &&
-+ dev->gc_not_done >= (background ? 10 : 20)) {
-+ yaffs2_find_oldest_dirty_seq(dev);
-+ if (dev->oldest_dirty_block > 0) {
-+ selected = dev->oldest_dirty_block;
-+ dev->gc_dirtiest = selected;
-+ dev->oldest_dirty_gc_count++;
-+ bi = yaffs_get_block_info(dev, selected);
-+ dev->gc_pages_in_use =
-+ bi->pages_in_use - bi->soft_del_pages;
-+ } else {
-+ dev->gc_not_done = 0;
-+ }
-+ }
-+
-+ if (selected) {
-+ yaffs_trace(YAFFS_TRACE_GC,
-+ "GC Selected block %d with %d free, prioritised:%d",
-+ selected,
-+ dev->param.chunks_per_block - dev->gc_pages_in_use,
-+ prioritised);
-+
-+ dev->n_gc_blocks++;
-+ if (background)
-+ dev->bg_gcs++;
-+
-+ dev->gc_dirtiest = 0;
-+ dev->gc_pages_in_use = 0;
-+ dev->gc_not_done = 0;
-+ if (dev->refresh_skip > 0)
-+ dev->refresh_skip--;
-+ } else {
-+ dev->gc_not_done++;
-+ yaffs_trace(YAFFS_TRACE_GC,
-+ "GC none: finder %d skip %d threshold %d dirtiest %d using %d oldest %d%s",
-+ dev->gc_block_finder, dev->gc_not_done, threshold,
-+ dev->gc_dirtiest, dev->gc_pages_in_use,
-+ dev->oldest_dirty_block, background ? " bg" : "");
-+ }
-+
-+ return selected;
-+}
-+
-+/* New garbage collector
-+ * If we're very low on erased blocks then we do aggressive garbage collection
-+ * otherwise we do "leasurely" garbage collection.
-+ * Aggressive gc looks further (whole array) and will accept less dirty blocks.
-+ * Passive gc only inspects smaller areas and only accepts more dirty blocks.
-+ *
-+ * The idea is to help clear out space in a more spread-out manner.
-+ * Dunno if it really does anything useful.
-+ */
-+static int yaffs_check_gc(struct yaffs_dev *dev, int background)
-+{
-+ int aggressive = 0;
-+ int gc_ok = YAFFS_OK;
-+ int max_tries = 0;
-+ int min_erased;
-+ int erased_chunks;
-+ int checkpt_block_adjust;
-+
-+ if (dev->param.gc_control_fn &&
-+ (dev->param.gc_control_fn(dev) & 1) == 0)
-+ return YAFFS_OK;
-+
-+ if (dev->gc_disable)
-+ /* Bail out so we don't get recursive gc */
-+ return YAFFS_OK;
-+
-+ /* This loop should pass the first time.
-+ * Only loops here if the collection does not increase space.
-+ */
-+
-+ do {
-+ max_tries++;
-+
-+ checkpt_block_adjust = yaffs_calc_checkpt_blocks_required(dev);
-+
-+ min_erased =
-+ dev->param.n_reserved_blocks + checkpt_block_adjust + 1;
-+ erased_chunks =
-+ dev->n_erased_blocks * dev->param.chunks_per_block;
-+
-+ /* If we need a block soon then do aggressive gc. */
-+ if (dev->n_erased_blocks < min_erased)
-+ aggressive = 1;
-+ else {
-+ if (!background
-+ && erased_chunks > (dev->n_free_chunks / 4))
-+ break;
-+
-+ if (dev->gc_skip > 20)
-+ dev->gc_skip = 20;
-+ if (erased_chunks < dev->n_free_chunks / 2 ||
-+ dev->gc_skip < 1 || background)
-+ aggressive = 0;
-+ else {
-+ dev->gc_skip--;
-+ break;
-+ }
-+ }
-+
-+ dev->gc_skip = 5;
-+
-+ /* If we don't already have a block being gc'd then see if we
-+ * should start another */
-+
-+ if (dev->gc_block < 1 && !aggressive) {
-+ dev->gc_block = yaffs2_find_refresh_block(dev);
-+ dev->gc_chunk = 0;
-+ dev->n_clean_ups = 0;
-+ }
-+ if (dev->gc_block < 1) {
-+ dev->gc_block =
-+ yaffs_find_gc_block(dev, aggressive, background);
-+ dev->gc_chunk = 0;
-+ dev->n_clean_ups = 0;
-+ }
-+
-+ if (dev->gc_block > 0) {
-+ dev->all_gcs++;
-+ if (!aggressive)
-+ dev->passive_gc_count++;
-+
-+ yaffs_trace(YAFFS_TRACE_GC,
-+ "yaffs: GC n_erased_blocks %d aggressive %d",
-+ dev->n_erased_blocks, aggressive);
-+
-+ gc_ok = yaffs_gc_block(dev, dev->gc_block, aggressive);
-+ }
-+
-+ if (dev->n_erased_blocks < (dev->param.n_reserved_blocks) &&
-+ dev->gc_block > 0) {
-+ yaffs_trace(YAFFS_TRACE_GC,
-+ "yaffs: GC !!!no reclaim!!! n_erased_blocks %d after try %d block %d",
-+ dev->n_erased_blocks, max_tries,
-+ dev->gc_block);
-+ }
-+ } while ((dev->n_erased_blocks < dev->param.n_reserved_blocks) &&
-+ (dev->gc_block > 0) && (max_tries < 2));
-+
-+ return aggressive ? gc_ok : YAFFS_OK;
-+}
-+
-+/*
-+ * yaffs_bg_gc()
-+ * Garbage collects. Intended to be called from a background thread.
-+ * Returns non-zero if at least half the free chunks are erased.
-+ */
-+int yaffs_bg_gc(struct yaffs_dev *dev, unsigned urgency)
-+{
-+ int erased_chunks = dev->n_erased_blocks * dev->param.chunks_per_block;
-+
-+ yaffs_trace(YAFFS_TRACE_BACKGROUND, "Background gc %u", urgency);
-+
-+ yaffs_check_gc(dev, 1);
-+ return erased_chunks > dev->n_free_chunks / 2;
-+}
-+
-+/*-------------------- Data file manipulation -----------------*/
-+
-+static int yaffs_rd_data_obj(struct yaffs_obj *in, int inode_chunk, u8 * buffer)
-+{
-+ int nand_chunk = yaffs_find_chunk_in_file(in, inode_chunk, NULL);
-+
-+ if (nand_chunk >= 0)
-+ return yaffs_rd_chunk_tags_nand(in->my_dev, nand_chunk,
-+ buffer, NULL);
-+ else {
-+ yaffs_trace(YAFFS_TRACE_NANDACCESS,
-+ "Chunk %d not found zero instead",
-+ nand_chunk);
-+ /* get sane (zero) data if you read a hole */
-+ memset(buffer, 0, in->my_dev->data_bytes_per_chunk);
-+ return 0;
-+ }
-+
-+}
-+
-+void yaffs_chunk_del(struct yaffs_dev *dev, int chunk_id, int mark_flash,
-+ int lyn)
-+{
-+ int block;
-+ int page;
-+ struct yaffs_ext_tags tags;
-+ struct yaffs_block_info *bi;
-+
-+ if (chunk_id <= 0)
-+ return;
-+
-+ dev->n_deletions++;
-+ block = chunk_id / dev->param.chunks_per_block;
-+ page = chunk_id % dev->param.chunks_per_block;
-+
-+ if (!yaffs_check_chunk_bit(dev, block, page))
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Deleting invalid chunk %d", chunk_id);
-+
-+ bi = yaffs_get_block_info(dev, block);
-+
-+ yaffs2_update_oldest_dirty_seq(dev, block, bi);
-+
-+ yaffs_trace(YAFFS_TRACE_DELETION,
-+ "line %d delete of chunk %d",
-+ lyn, chunk_id);
-+
-+ if (!dev->param.is_yaffs2 && mark_flash &&
-+ bi->block_state != YAFFS_BLOCK_STATE_COLLECTING) {
-+
-+ memset(&tags, 0, sizeof(tags));
-+ tags.is_deleted = 1;
-+ yaffs_wr_chunk_tags_nand(dev, chunk_id, NULL, &tags);
-+ yaffs_handle_chunk_update(dev, chunk_id, &tags);
-+ } else {
-+ dev->n_unmarked_deletions++;
-+ }
-+
-+ /* Pull out of the management area.
-+ * If the whole block became dirty, this will kick off an erasure.
-+ */
-+ if (bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING ||
-+ bi->block_state == YAFFS_BLOCK_STATE_FULL ||
-+ bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCAN ||
-+ bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) {
-+ dev->n_free_chunks++;
-+ yaffs_clear_chunk_bit(dev, block, page);
-+ bi->pages_in_use--;
-+
-+ if (bi->pages_in_use == 0 &&
-+ !bi->has_shrink_hdr &&
-+ bi->block_state != YAFFS_BLOCK_STATE_ALLOCATING &&
-+ bi->block_state != YAFFS_BLOCK_STATE_NEEDS_SCAN) {
-+ yaffs_block_became_dirty(dev, block);
-+ }
-+ }
-+}
-+
-+static int yaffs_wr_data_obj(struct yaffs_obj *in, int inode_chunk,
-+ const u8 *buffer, int n_bytes, int use_reserve)
-+{
-+ /* Find old chunk Need to do this to get serial number
-+ * Write new one and patch into tree.
-+ * Invalidate old tags.
-+ */
-+
-+ int prev_chunk_id;
-+ struct yaffs_ext_tags prev_tags;
-+ int new_chunk_id;
-+ struct yaffs_ext_tags new_tags;
-+ struct yaffs_dev *dev = in->my_dev;
-+
-+ yaffs_check_gc(dev, 0);
-+
-+ /* Get the previous chunk at this location in the file if it exists.
-+ * If it does not exist then put a zero into the tree. This creates
-+ * the tnode now, rather than later when it is harder to clean up.
-+ */
-+ prev_chunk_id = yaffs_find_chunk_in_file(in, inode_chunk, &prev_tags);
-+ if (prev_chunk_id < 1 &&
-+ !yaffs_put_chunk_in_file(in, inode_chunk, 0, 0))
-+ return 0;
-+
-+ /* Set up new tags */
-+ memset(&new_tags, 0, sizeof(new_tags));
-+
-+ new_tags.chunk_id = inode_chunk;
-+ new_tags.obj_id = in->obj_id;
-+ new_tags.serial_number =
-+ (prev_chunk_id > 0) ? prev_tags.serial_number + 1 : 1;
-+ new_tags.n_bytes = n_bytes;
-+
-+ if (n_bytes < 1 || n_bytes > dev->param.total_bytes_per_chunk) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "Writing %d bytes to chunk!!!!!!!!!",
-+ n_bytes);
-+ BUG();
-+ }
-+
-+ new_chunk_id =
-+ yaffs_write_new_chunk(dev, buffer, &new_tags, use_reserve);
-+
-+ if (new_chunk_id > 0) {
-+ yaffs_put_chunk_in_file(in, inode_chunk, new_chunk_id, 0);
-+
-+ if (prev_chunk_id > 0)
-+ yaffs_chunk_del(dev, prev_chunk_id, 1, __LINE__);
-+
-+ yaffs_verify_file_sane(in);
-+ }
-+ return new_chunk_id;
-+
-+}
-+
-+
-+
-+static int yaffs_do_xattrib_mod(struct yaffs_obj *obj, int set,
-+ const YCHAR *name, const void *value, int size,
-+ int flags)
-+{
-+ struct yaffs_xattr_mod xmod;
-+ int result;
-+
-+ xmod.set = set;
-+ xmod.name = name;
-+ xmod.data = value;
-+ xmod.size = size;
-+ xmod.flags = flags;
-+ xmod.result = -ENOSPC;
-+
-+ result = yaffs_update_oh(obj, NULL, 0, 0, 0, &xmod);
-+
-+ if (result > 0)
-+ return xmod.result;
-+ else
-+ return -ENOSPC;
-+}
-+
-+static int yaffs_apply_xattrib_mod(struct yaffs_obj *obj, char *buffer,
-+ struct yaffs_xattr_mod *xmod)
-+{
-+ int retval = 0;
-+ int x_offs = sizeof(struct yaffs_obj_hdr);
-+ struct yaffs_dev *dev = obj->my_dev;
-+ int x_size = dev->data_bytes_per_chunk - sizeof(struct yaffs_obj_hdr);
-+ char *x_buffer = buffer + x_offs;
-+
-+ if (xmod->set)
-+ retval =
-+ nval_set(x_buffer, x_size, xmod->name, xmod->data,
-+ xmod->size, xmod->flags);
-+ else
-+ retval = nval_del(x_buffer, x_size, xmod->name);
-+
-+ obj->has_xattr = nval_hasvalues(x_buffer, x_size);
-+ obj->xattr_known = 1;
-+ xmod->result = retval;
-+
-+ return retval;
-+}
-+
-+static int yaffs_do_xattrib_fetch(struct yaffs_obj *obj, const YCHAR *name,
-+ void *value, int size)
-+{
-+ char *buffer = NULL;
-+ int result;
-+ struct yaffs_ext_tags tags;
-+ struct yaffs_dev *dev = obj->my_dev;
-+ int x_offs = sizeof(struct yaffs_obj_hdr);
-+ int x_size = dev->data_bytes_per_chunk - sizeof(struct yaffs_obj_hdr);
-+ char *x_buffer;
-+ int retval = 0;
-+
-+ if (obj->hdr_chunk < 1)
-+ return -ENODATA;
-+
-+ /* If we know that the object has no xattribs then don't do all the
-+ * reading and parsing.
-+ */
-+ if (obj->xattr_known && !obj->has_xattr) {
-+ if (name)
-+ return -ENODATA;
-+ else
-+ return 0;
-+ }
-+
-+ buffer = (char *)yaffs_get_temp_buffer(dev);
-+ if (!buffer)
-+ return -ENOMEM;
-+
-+ result =
-+ yaffs_rd_chunk_tags_nand(dev, obj->hdr_chunk, (u8 *) buffer, &tags);
-+
-+ if (result != YAFFS_OK)
-+ retval = -ENOENT;
-+ else {
-+ x_buffer = buffer + x_offs;
-+
-+ if (!obj->xattr_known) {
-+ obj->has_xattr = nval_hasvalues(x_buffer, x_size);
-+ obj->xattr_known = 1;
-+ }
-+
-+ if (name)
-+ retval = nval_get(x_buffer, x_size, name, value, size);
-+ else
-+ retval = nval_list(x_buffer, x_size, value, size);
-+ }
-+ yaffs_release_temp_buffer(dev, (u8 *) buffer);
-+ return retval;
-+}
-+
-+int yaffs_set_xattrib(struct yaffs_obj *obj, const YCHAR * name,
-+ const void *value, int size, int flags)
-+{
-+ return yaffs_do_xattrib_mod(obj, 1, name, value, size, flags);
-+}
-+
-+int yaffs_remove_xattrib(struct yaffs_obj *obj, const YCHAR * name)
-+{
-+ return yaffs_do_xattrib_mod(obj, 0, name, NULL, 0, 0);
-+}
-+
-+int yaffs_get_xattrib(struct yaffs_obj *obj, const YCHAR * name, void *value,
-+ int size)
-+{
-+ return yaffs_do_xattrib_fetch(obj, name, value, size);
-+}
-+
-+int yaffs_list_xattrib(struct yaffs_obj *obj, char *buffer, int size)
-+{
-+ return yaffs_do_xattrib_fetch(obj, NULL, buffer, size);
-+}
-+
-+static void yaffs_check_obj_details_loaded(struct yaffs_obj *in)
-+{
-+ u8 *buf;
-+ struct yaffs_obj_hdr *oh;
-+ struct yaffs_dev *dev;
-+ struct yaffs_ext_tags tags;
-+ int result;
-+ int alloc_failed = 0;
-+
-+ if (!in || !in->lazy_loaded || in->hdr_chunk < 1)
-+ return;
-+
-+ dev = in->my_dev;
-+ in->lazy_loaded = 0;
-+ buf = yaffs_get_temp_buffer(dev);
-+
-+ result = yaffs_rd_chunk_tags_nand(dev, in->hdr_chunk, buf, &tags);
-+ oh = (struct yaffs_obj_hdr *)buf;
-+
-+ in->yst_mode = oh->yst_mode;
-+ yaffs_load_attribs(in, oh);
-+ yaffs_set_obj_name_from_oh(in, oh);
-+
-+ if (in->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) {
-+ in->variant.symlink_variant.alias =
-+ yaffs_clone_str(oh->alias);
-+ if (!in->variant.symlink_variant.alias)
-+ alloc_failed = 1; /* Not returned */
-+ }
-+ yaffs_release_temp_buffer(dev, buf);
-+}
-+
-+static void yaffs_load_name_from_oh(struct yaffs_dev *dev, YCHAR *name,
-+ const YCHAR *oh_name, int buff_size)
-+{
-+#ifdef CONFIG_YAFFS_AUTO_UNICODE
-+ if (dev->param.auto_unicode) {
-+ if (*oh_name) {
-+ /* It is an ASCII name, do an ASCII to
-+ * unicode conversion */
-+ const char *ascii_oh_name = (const char *)oh_name;
-+ int n = buff_size - 1;
-+ while (n > 0 && *ascii_oh_name) {
-+ *name = *ascii_oh_name;
-+ name++;
-+ ascii_oh_name++;
-+ n--;
-+ }
-+ } else {
-+ strncpy(name, oh_name + 1, buff_size - 1);
-+ }
-+ } else {
-+#else
-+ (void) dev;
-+ {
-+#endif
-+ strncpy(name, oh_name, buff_size - 1);
-+ }
-+}
-+
-+static void yaffs_load_oh_from_name(struct yaffs_dev *dev, YCHAR *oh_name,
-+ const YCHAR *name)
-+{
-+#ifdef CONFIG_YAFFS_AUTO_UNICODE
-+
-+ int is_ascii;
-+ YCHAR *w;
-+
-+ if (dev->param.auto_unicode) {
-+
-+ is_ascii = 1;
-+ w = name;
-+
-+ /* Figure out if the name will fit in ascii character set */
-+ while (is_ascii && *w) {
-+ if ((*w) & 0xff00)
-+ is_ascii = 0;
-+ w++;
-+ }
-+
-+ if (is_ascii) {
-+ /* It is an ASCII name, so convert unicode to ascii */
-+ char *ascii_oh_name = (char *)oh_name;
-+ int n = YAFFS_MAX_NAME_LENGTH - 1;
-+ while (n > 0 && *name) {
-+ *ascii_oh_name = *name;
-+ name++;
-+ ascii_oh_name++;
-+ n--;
-+ }
-+ } else {
-+ /* Unicode name, so save starting at the second YCHAR */
-+ *oh_name = 0;
-+ strncpy(oh_name + 1, name, YAFFS_MAX_NAME_LENGTH - 2);
-+ }
-+ } else {
-+#else
-+ dev = dev;
-+ {
-+#endif
-+ strncpy(oh_name, name, YAFFS_MAX_NAME_LENGTH - 1);
-+ }
-+}
-+
-+/* UpdateObjectHeader updates the header on NAND for an object.
-+ * If name is not NULL, then that new name is used.
-+ */
-+int yaffs_update_oh(struct yaffs_obj *in, const YCHAR *name, int force,
-+ int is_shrink, int shadows, struct yaffs_xattr_mod *xmod)
-+{
-+
-+ struct yaffs_block_info *bi;
-+ struct yaffs_dev *dev = in->my_dev;
-+ int prev_chunk_id;
-+ int ret_val = 0;
-+ int result = 0;
-+ int new_chunk_id;
-+ struct yaffs_ext_tags new_tags;
-+ struct yaffs_ext_tags old_tags;
-+ const YCHAR *alias = NULL;
-+ u8 *buffer = NULL;
-+ YCHAR old_name[YAFFS_MAX_NAME_LENGTH + 1];
-+ struct yaffs_obj_hdr *oh = NULL;
-+ loff_t file_size = 0;
-+
-+ strcpy(old_name, _Y("silly old name"));
-+
-+ if (in->fake && in != dev->root_dir && !force && !xmod)
-+ return ret_val;
-+
-+ yaffs_check_gc(dev, 0);
-+ yaffs_check_obj_details_loaded(in);
-+
-+ buffer = yaffs_get_temp_buffer(in->my_dev);
-+ oh = (struct yaffs_obj_hdr *)buffer;
-+
-+ prev_chunk_id = in->hdr_chunk;
-+
-+ if (prev_chunk_id > 0) {
-+ result = yaffs_rd_chunk_tags_nand(dev, prev_chunk_id,
-+ buffer, &old_tags);
-+
-+ yaffs_verify_oh(in, oh, &old_tags, 0);
-+ memcpy(old_name, oh->name, sizeof(oh->name));
-+ memset(buffer, 0xff, sizeof(struct yaffs_obj_hdr));
-+ } else {
-+ memset(buffer, 0xff, dev->data_bytes_per_chunk);
-+ }
-+
-+ oh->type = in->variant_type;
-+ oh->yst_mode = in->yst_mode;
-+ oh->shadows_obj = oh->inband_shadowed_obj_id = shadows;
-+
-+ yaffs_load_attribs_oh(oh, in);
-+
-+ if (in->parent)
-+ oh->parent_obj_id = in->parent->obj_id;
-+ else
-+ oh->parent_obj_id = 0;
-+
-+ if (name && *name) {
-+ memset(oh->name, 0, sizeof(oh->name));
-+ yaffs_load_oh_from_name(dev, oh->name, name);
-+ } else if (prev_chunk_id > 0) {
-+ memcpy(oh->name, old_name, sizeof(oh->name));
-+ } else {
-+ memset(oh->name, 0, sizeof(oh->name));
-+ }
-+
-+ oh->is_shrink = is_shrink;
-+
-+ switch (in->variant_type) {
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ /* Should not happen */
-+ break;
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ if (oh->parent_obj_id != YAFFS_OBJECTID_DELETED &&
-+ oh->parent_obj_id != YAFFS_OBJECTID_UNLINKED)
-+ file_size = in->variant.file_variant.file_size;
-+ yaffs_oh_size_load(oh, file_size);
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ oh->equiv_id = in->variant.hardlink_variant.equiv_id;
-+ break;
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ /* Do nothing */
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ /* Do nothing */
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ alias = in->variant.symlink_variant.alias;
-+ if (!alias)
-+ alias = _Y("no alias");
-+ strncpy(oh->alias, alias, YAFFS_MAX_ALIAS_LENGTH);
-+ oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0;
-+ break;
-+ }
-+
-+ /* process any xattrib modifications */
-+ if (xmod)
-+ yaffs_apply_xattrib_mod(in, (char *)buffer, xmod);
-+
-+ /* Tags */
-+ memset(&new_tags, 0, sizeof(new_tags));
-+ in->serial++;
-+ new_tags.chunk_id = 0;
-+ new_tags.obj_id = in->obj_id;
-+ new_tags.serial_number = in->serial;
-+
-+ /* Add extra info for file header */
-+ new_tags.extra_available = 1;
-+ new_tags.extra_parent_id = oh->parent_obj_id;
-+ new_tags.extra_file_size = file_size;
-+ new_tags.extra_is_shrink = oh->is_shrink;
-+ new_tags.extra_equiv_id = oh->equiv_id;
-+ new_tags.extra_shadows = (oh->shadows_obj > 0) ? 1 : 0;
-+ new_tags.extra_obj_type = in->variant_type;
-+ yaffs_verify_oh(in, oh, &new_tags, 1);
-+
-+ /* Create new chunk in NAND */
-+ new_chunk_id =
-+ yaffs_write_new_chunk(dev, buffer, &new_tags,
-+ (prev_chunk_id > 0) ? 1 : 0);
-+
-+ if (buffer)
-+ yaffs_release_temp_buffer(dev, buffer);
-+
-+ if (new_chunk_id < 0)
-+ return new_chunk_id;
-+
-+ in->hdr_chunk = new_chunk_id;
-+
-+ if (prev_chunk_id > 0)
-+ yaffs_chunk_del(dev, prev_chunk_id, 1, __LINE__);
-+
-+ if (!yaffs_obj_cache_dirty(in))
-+ in->dirty = 0;
-+
-+ /* If this was a shrink, then mark the block
-+ * that the chunk lives on */
-+ if (is_shrink) {
-+ bi = yaffs_get_block_info(in->my_dev,
-+ new_chunk_id /
-+ in->my_dev->param.chunks_per_block);
-+ bi->has_shrink_hdr = 1;
-+ }
-+
-+
-+ return new_chunk_id;
-+}
-+
-+/*--------------------- File read/write ------------------------
-+ * Read and write have very similar structures.
-+ * In general the read/write has three parts to it
-+ * An incomplete chunk to start with (if the read/write is not chunk-aligned)
-+ * Some complete chunks
-+ * An incomplete chunk to end off with
-+ *
-+ * Curve-balls: the first chunk might also be the last chunk.
-+ */
-+
-+int yaffs_file_rd(struct yaffs_obj *in, u8 * buffer, loff_t offset, int n_bytes)
-+{
-+ int chunk;
-+ u32 start;
-+ int n_copy;
-+ int n = n_bytes;
-+ int n_done = 0;
-+ struct yaffs_cache *cache;
-+ struct yaffs_dev *dev;
-+
-+ dev = in->my_dev;
-+
-+ while (n > 0) {
-+ yaffs_addr_to_chunk(dev, offset, &chunk, &start);
-+ chunk++;
-+
-+ /* OK now check for the curveball where the start and end are in
-+ * the same chunk.
-+ */
-+ if ((start + n) < dev->data_bytes_per_chunk)
-+ n_copy = n;
-+ else
-+ n_copy = dev->data_bytes_per_chunk - start;
-+
-+ cache = yaffs_find_chunk_cache(in, chunk);
-+
-+ /* If the chunk is already in the cache or it is less than
-+ * a whole chunk or we're using inband tags then use the cache
-+ * (if there is caching) else bypass the cache.
-+ */
-+ if (cache || n_copy != dev->data_bytes_per_chunk ||
-+ dev->param.inband_tags) {
-+ if (dev->param.n_caches > 0) {
-+
-+ /* If we can't find the data in the cache,
-+ * then load it up. */
-+
-+ if (!cache) {
-+ cache =
-+ yaffs_grab_chunk_cache(in->my_dev);
-+ cache->object = in;
-+ cache->chunk_id = chunk;
-+ cache->dirty = 0;
-+ cache->locked = 0;
-+ yaffs_rd_data_obj(in, chunk,
-+ cache->data);
-+ cache->n_bytes = 0;
-+ }
-+
-+ yaffs_use_cache(dev, cache, 0);
-+
-+ cache->locked = 1;
-+
-+ memcpy(buffer, &cache->data[start], n_copy);
-+
-+ cache->locked = 0;
-+ } else {
-+ /* Read into the local buffer then copy.. */
-+
-+ u8 *local_buffer =
-+ yaffs_get_temp_buffer(dev);
-+ yaffs_rd_data_obj(in, chunk, local_buffer);
-+
-+ memcpy(buffer, &local_buffer[start], n_copy);
-+
-+ yaffs_release_temp_buffer(dev, local_buffer);
-+ }
-+ } else {
-+ /* A full chunk. Read directly into the buffer. */
-+ yaffs_rd_data_obj(in, chunk, buffer);
-+ }
-+ n -= n_copy;
-+ offset += n_copy;
-+ buffer += n_copy;
-+ n_done += n_copy;
-+ }
-+ return n_done;
-+}
-+
-+int yaffs_do_file_wr(struct yaffs_obj *in, const u8 *buffer, loff_t offset,
-+ int n_bytes, int write_through)
-+{
-+
-+ int chunk;
-+ u32 start;
-+ int n_copy;
-+ int n = n_bytes;
-+ int n_done = 0;
-+ int n_writeback;
-+ loff_t start_write = offset;
-+ int chunk_written = 0;
-+ u32 n_bytes_read;
-+ loff_t chunk_start;
-+ struct yaffs_dev *dev;
-+
-+ dev = in->my_dev;
-+
-+ while (n > 0 && chunk_written >= 0) {
-+ yaffs_addr_to_chunk(dev, offset, &chunk, &start);
-+
-+ if (((loff_t)chunk) *
-+ dev->data_bytes_per_chunk + start != offset ||
-+ start >= dev->data_bytes_per_chunk) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "AddrToChunk of offset %lld gives chunk %d start %d",
-+ offset, chunk, start);
-+ }
-+ chunk++; /* File pos to chunk in file offset */
-+
-+ /* OK now check for the curveball where the start and end are in
-+ * the same chunk.
-+ */
-+
-+ if ((start + n) < dev->data_bytes_per_chunk) {
-+ n_copy = n;
-+
-+ /* Now calculate how many bytes to write back....
-+ * If we're overwriting and not writing to then end of
-+ * file then we need to write back as much as was there
-+ * before.
-+ */
-+
-+ chunk_start = (((loff_t)(chunk - 1)) *
-+ dev->data_bytes_per_chunk);
-+
-+ if (chunk_start > in->variant.file_variant.file_size)
-+ n_bytes_read = 0; /* Past end of file */
-+ else
-+ n_bytes_read =
-+ in->variant.file_variant.file_size -
-+ chunk_start;
-+
-+ if (n_bytes_read > dev->data_bytes_per_chunk)
-+ n_bytes_read = dev->data_bytes_per_chunk;
-+
-+ n_writeback =
-+ (n_bytes_read >
-+ (start + n)) ? n_bytes_read : (start + n);
-+
-+ if (n_writeback < 0 ||
-+ n_writeback > dev->data_bytes_per_chunk)
-+ BUG();
-+
-+ } else {
-+ n_copy = dev->data_bytes_per_chunk - start;
-+ n_writeback = dev->data_bytes_per_chunk;
-+ }
-+
-+ if (n_copy != dev->data_bytes_per_chunk ||
-+ !dev->param.cache_bypass_aligned ||
-+ dev->param.inband_tags) {
-+ /* An incomplete start or end chunk (or maybe both
-+ * start and end chunk), or we're using inband tags,
-+ * or we're forcing writes through the cache,
-+ * so we want to use the cache buffers.
-+ */
-+ if (dev->param.n_caches > 0) {
-+ struct yaffs_cache *cache;
-+
-+ /* If we can't find the data in the cache, then
-+ * load the cache */
-+ cache = yaffs_find_chunk_cache(in, chunk);
-+
-+ if (!cache &&
-+ yaffs_check_alloc_available(dev, 1)) {
-+ cache = yaffs_grab_chunk_cache(dev);
-+ cache->object = in;
-+ cache->chunk_id = chunk;
-+ cache->dirty = 0;
-+ cache->locked = 0;
-+ yaffs_rd_data_obj(in, chunk,
-+ cache->data);
-+ } else if (cache &&
-+ !cache->dirty &&
-+ !yaffs_check_alloc_available(dev,
-+ 1)) {
-+ /* Drop the cache if it was a read cache
-+ * item and no space check has been made
-+ * for it.
-+ */
-+ cache = NULL;
-+ }
-+
-+ if (cache) {
-+ yaffs_use_cache(dev, cache, 1);
-+ cache->locked = 1;
-+
-+ memcpy(&cache->data[start], buffer,
-+ n_copy);
-+
-+ cache->locked = 0;
-+ cache->n_bytes = n_writeback;
-+
-+ if (write_through) {
-+ chunk_written =
-+ yaffs_wr_data_obj
-+ (cache->object,
-+ cache->chunk_id,
-+ cache->data,
-+ cache->n_bytes, 1);
-+ cache->dirty = 0;
-+ }
-+ } else {
-+ chunk_written = -1; /* fail write */
-+ }
-+ } else {
-+ /* An incomplete start or end chunk (or maybe
-+ * both start and end chunk). Read into the
-+ * local buffer then copy over and write back.
-+ */
-+
-+ u8 *local_buffer = yaffs_get_temp_buffer(dev);
-+
-+ yaffs_rd_data_obj(in, chunk, local_buffer);
-+ memcpy(&local_buffer[start], buffer, n_copy);
-+
-+ chunk_written =
-+ yaffs_wr_data_obj(in, chunk,
-+ local_buffer,
-+ n_writeback, 0);
-+
-+ yaffs_release_temp_buffer(dev, local_buffer);
-+ }
-+ } else {
-+ /* A full chunk. Write directly from the buffer. */
-+
-+ chunk_written =
-+ yaffs_wr_data_obj(in, chunk, buffer,
-+ dev->data_bytes_per_chunk, 0);
-+
-+ /* Since we've overwritten the cached data,
-+ * we better invalidate it. */
-+ yaffs_invalidate_chunk_cache(in, chunk);
-+ }
-+
-+ if (chunk_written >= 0) {
-+ n -= n_copy;
-+ offset += n_copy;
-+ buffer += n_copy;
-+ n_done += n_copy;
-+ }
-+ }
-+
-+ /* Update file object */
-+
-+ if ((start_write + n_done) > in->variant.file_variant.file_size)
-+ in->variant.file_variant.file_size = (start_write + n_done);
-+
-+ in->dirty = 1;
-+ return n_done;
-+}
-+
-+int yaffs_wr_file(struct yaffs_obj *in, const u8 *buffer, loff_t offset,
-+ int n_bytes, int write_through)
-+{
-+ yaffs2_handle_hole(in, offset);
-+ return yaffs_do_file_wr(in, buffer, offset, n_bytes, write_through);
-+}
-+
-+/* ---------------------- File resizing stuff ------------------ */
-+
-+static void yaffs_prune_chunks(struct yaffs_obj *in, loff_t new_size)
-+{
-+
-+ struct yaffs_dev *dev = in->my_dev;
-+ loff_t old_size = in->variant.file_variant.file_size;
-+ int i;
-+ int chunk_id;
-+ u32 dummy;
-+ int last_del;
-+ int start_del;
-+
-+ if (old_size > 0)
-+ yaffs_addr_to_chunk(dev, old_size - 1, &last_del, &dummy);
-+ else
-+ last_del = 0;
-+
-+ yaffs_addr_to_chunk(dev, new_size + dev->data_bytes_per_chunk - 1,
-+ &start_del, &dummy);
-+ last_del++;
-+ start_del++;
-+
-+ /* Delete backwards so that we don't end up with holes if
-+ * power is lost part-way through the operation.
-+ */
-+ for (i = last_del; i >= start_del; i--) {
-+ /* NB this could be optimised somewhat,
-+ * eg. could retrieve the tags and write them without
-+ * using yaffs_chunk_del
-+ */
-+
-+ chunk_id = yaffs_find_del_file_chunk(in, i, NULL);
-+
-+ if (chunk_id < 1)
-+ continue;
-+
-+ if (chunk_id <
-+ (dev->internal_start_block * dev->param.chunks_per_block) ||
-+ chunk_id >=
-+ ((dev->internal_end_block + 1) *
-+ dev->param.chunks_per_block)) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "Found daft chunk_id %d for %d",
-+ chunk_id, i);
-+ } else {
-+ in->n_data_chunks--;
-+ yaffs_chunk_del(dev, chunk_id, 1, __LINE__);
-+ }
-+ }
-+}
-+
-+void yaffs_resize_file_down(struct yaffs_obj *obj, loff_t new_size)
-+{
-+ int new_full;
-+ u32 new_partial;
-+ struct yaffs_dev *dev = obj->my_dev;
-+
-+ yaffs_addr_to_chunk(dev, new_size, &new_full, &new_partial);
-+
-+ yaffs_prune_chunks(obj, new_size);
-+
-+ if (new_partial != 0) {
-+ int last_chunk = 1 + new_full;
-+ u8 *local_buffer = yaffs_get_temp_buffer(dev);
-+
-+ /* Rewrite the last chunk with its new size and zero pad */
-+ yaffs_rd_data_obj(obj, last_chunk, local_buffer);
-+ memset(local_buffer + new_partial, 0,
-+ dev->data_bytes_per_chunk - new_partial);
-+
-+ yaffs_wr_data_obj(obj, last_chunk, local_buffer,
-+ new_partial, 1);
-+
-+ yaffs_release_temp_buffer(dev, local_buffer);
-+ }
-+
-+ obj->variant.file_variant.file_size = new_size;
-+
-+ yaffs_prune_tree(dev, &obj->variant.file_variant);
-+}
-+
-+int yaffs_resize_file(struct yaffs_obj *in, loff_t new_size)
-+{
-+ struct yaffs_dev *dev = in->my_dev;
-+ loff_t old_size = in->variant.file_variant.file_size;
-+
-+ yaffs_flush_file_cache(in);
-+ yaffs_invalidate_whole_cache(in);
-+
-+ yaffs_check_gc(dev, 0);
-+
-+ if (in->variant_type != YAFFS_OBJECT_TYPE_FILE)
-+ return YAFFS_FAIL;
-+
-+ if (new_size == old_size)
-+ return YAFFS_OK;
-+
-+ if (new_size > old_size) {
-+ yaffs2_handle_hole(in, new_size);
-+ in->variant.file_variant.file_size = new_size;
-+ } else {
-+ /* new_size < old_size */
-+ yaffs_resize_file_down(in, new_size);
-+ }
-+
-+ /* Write a new object header to reflect the resize.
-+ * show we've shrunk the file, if need be
-+ * Do this only if the file is not in the deleted directories
-+ * and is not shadowed.
-+ */
-+ if (in->parent &&
-+ !in->is_shadowed &&
-+ in->parent->obj_id != YAFFS_OBJECTID_UNLINKED &&
-+ in->parent->obj_id != YAFFS_OBJECTID_DELETED)
-+ yaffs_update_oh(in, NULL, 0, 0, 0, NULL);
-+
-+ return YAFFS_OK;
-+}
-+
-+int yaffs_flush_file(struct yaffs_obj *in, int update_time, int data_sync)
-+{
-+ if (!in->dirty)
-+ return YAFFS_OK;
-+
-+ yaffs_flush_file_cache(in);
-+
-+ if (data_sync)
-+ return YAFFS_OK;
-+
-+ if (update_time)
-+ yaffs_load_current_time(in, 0, 0);
-+
-+ return (yaffs_update_oh(in, NULL, 0, 0, 0, NULL) >= 0) ?
-+ YAFFS_OK : YAFFS_FAIL;
-+}
-+
-+
-+/* yaffs_del_file deletes the whole file data
-+ * and the inode associated with the file.
-+ * It does not delete the links associated with the file.
-+ */
-+static int yaffs_unlink_file_if_needed(struct yaffs_obj *in)
-+{
-+ int ret_val;
-+ int del_now = 0;
-+ struct yaffs_dev *dev = in->my_dev;
-+
-+ if (!in->my_inode)
-+ del_now = 1;
-+
-+ if (del_now) {
-+ ret_val =
-+ yaffs_change_obj_name(in, in->my_dev->del_dir,
-+ _Y("deleted"), 0, 0);
-+ yaffs_trace(YAFFS_TRACE_TRACING,
-+ "yaffs: immediate deletion of file %d",
-+ in->obj_id);
-+ in->deleted = 1;
-+ in->my_dev->n_deleted_files++;
-+ if (dev->param.disable_soft_del || dev->param.is_yaffs2)
-+ yaffs_resize_file(in, 0);
-+ yaffs_soft_del_file(in);
-+ } else {
-+ ret_val =
-+ yaffs_change_obj_name(in, in->my_dev->unlinked_dir,
-+ _Y("unlinked"), 0, 0);
-+ }
-+ return ret_val;
-+}
-+
-+static int yaffs_del_file(struct yaffs_obj *in)
-+{
-+ int ret_val = YAFFS_OK;
-+ int deleted; /* Need to cache value on stack if in is freed */
-+ struct yaffs_dev *dev = in->my_dev;
-+
-+ if (dev->param.disable_soft_del || dev->param.is_yaffs2)
-+ yaffs_resize_file(in, 0);
-+
-+ if (in->n_data_chunks > 0) {
-+ /* Use soft deletion if there is data in the file.
-+ * That won't be the case if it has been resized to zero.
-+ */
-+ if (!in->unlinked)
-+ ret_val = yaffs_unlink_file_if_needed(in);
-+
-+ deleted = in->deleted;
-+
-+ if (ret_val == YAFFS_OK && in->unlinked && !in->deleted) {
-+ in->deleted = 1;
-+ deleted = 1;
-+ in->my_dev->n_deleted_files++;
-+ yaffs_soft_del_file(in);
-+ }
-+ return deleted ? YAFFS_OK : YAFFS_FAIL;
-+ } else {
-+ /* The file has no data chunks so we toss it immediately */
-+ yaffs_free_tnode(in->my_dev, in->variant.file_variant.top);
-+ in->variant.file_variant.top = NULL;
-+ yaffs_generic_obj_del(in);
-+
-+ return YAFFS_OK;
-+ }
-+}
-+
-+int yaffs_is_non_empty_dir(struct yaffs_obj *obj)
-+{
-+ return (obj &&
-+ obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) &&
-+ !(list_empty(&obj->variant.dir_variant.children));
-+}
-+
-+static int yaffs_del_dir(struct yaffs_obj *obj)
-+{
-+ /* First check that the directory is empty. */
-+ if (yaffs_is_non_empty_dir(obj))
-+ return YAFFS_FAIL;
-+
-+ return yaffs_generic_obj_del(obj);
-+}
-+
-+static int yaffs_del_symlink(struct yaffs_obj *in)
-+{
-+ kfree(in->variant.symlink_variant.alias);
-+ in->variant.symlink_variant.alias = NULL;
-+
-+ return yaffs_generic_obj_del(in);
-+}
-+
-+static int yaffs_del_link(struct yaffs_obj *in)
-+{
-+ /* remove this hardlink from the list associated with the equivalent
-+ * object
-+ */
-+ list_del_init(&in->hard_links);
-+ return yaffs_generic_obj_del(in);
-+}
-+
-+int yaffs_del_obj(struct yaffs_obj *obj)
-+{
-+ int ret_val = -1;
-+
-+ switch (obj->variant_type) {
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ ret_val = yaffs_del_file(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ if (!list_empty(&obj->variant.dir_variant.dirty)) {
-+ yaffs_trace(YAFFS_TRACE_BACKGROUND,
-+ "Remove object %d from dirty directories",
-+ obj->obj_id);
-+ list_del_init(&obj->variant.dir_variant.dirty);
-+ }
-+ return yaffs_del_dir(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ ret_val = yaffs_del_symlink(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ ret_val = yaffs_del_link(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ ret_val = yaffs_generic_obj_del(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ ret_val = 0;
-+ break; /* should not happen. */
-+ }
-+ return ret_val;
-+}
-+
-+
-+static void yaffs_empty_dir_to_dir(struct yaffs_obj *from_dir,
-+ struct yaffs_obj *to_dir)
-+{
-+ struct yaffs_obj *obj;
-+ struct list_head *lh;
-+ struct list_head *n;
-+
-+ list_for_each_safe(lh, n, &from_dir->variant.dir_variant.children) {
-+ obj = list_entry(lh, struct yaffs_obj, siblings);
-+ yaffs_add_obj_to_dir(to_dir, obj);
-+ }
-+}
-+
-+struct yaffs_obj *yaffs_retype_obj(struct yaffs_obj *obj,
-+ enum yaffs_obj_type type)
-+{
-+ /* Tear down the old variant */
-+ switch (obj->variant_type) {
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ /* Nuke file data */
-+ yaffs_resize_file(obj, 0);
-+ yaffs_free_tnode(obj->my_dev, obj->variant.file_variant.top);
-+ obj->variant.file_variant.top = NULL;
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ /* Put the children in lost and found. */
-+ yaffs_empty_dir_to_dir(obj, obj->my_dev->lost_n_found);
-+ if (!list_empty(&obj->variant.dir_variant.dirty))
-+ list_del_init(&obj->variant.dir_variant.dirty);
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ /* Nuke symplink data */
-+ kfree(obj->variant.symlink_variant.alias);
-+ obj->variant.symlink_variant.alias = NULL;
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ list_del_init(&obj->hard_links);
-+ break;
-+ default:
-+ break;
-+ }
-+
-+ memset(&obj->variant, 0, sizeof(obj->variant));
-+
-+ /*Set up new variant if the memset is not enough. */
-+ switch (type) {
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ INIT_LIST_HEAD(&obj->variant.dir_variant.children);
-+ INIT_LIST_HEAD(&obj->variant.dir_variant.dirty);
-+ break;
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ default:
-+ break;
-+ }
-+
-+ obj->variant_type = type;
-+
-+ return obj;
-+
-+}
-+
-+static int yaffs_unlink_worker(struct yaffs_obj *obj)
-+{
-+ int del_now = 0;
-+
-+ if (!obj)
-+ return YAFFS_FAIL;
-+
-+ if (!obj->my_inode)
-+ del_now = 1;
-+
-+ yaffs_update_parent(obj->parent);
-+
-+ if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) {
-+ return yaffs_del_link(obj);
-+ } else if (!list_empty(&obj->hard_links)) {
-+ /* Curve ball: We're unlinking an object that has a hardlink.
-+ *
-+ * This problem arises because we are not strictly following
-+ * The Linux link/inode model.
-+ *
-+ * We can't really delete the object.
-+ * Instead, we do the following:
-+ * - Select a hardlink.
-+ * - Unhook it from the hard links
-+ * - Move it from its parent directory so that the rename works.
-+ * - Rename the object to the hardlink's name.
-+ * - Delete the hardlink
-+ */
-+
-+ struct yaffs_obj *hl;
-+ struct yaffs_obj *parent;
-+ int ret_val;
-+ YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
-+
-+ hl = list_entry(obj->hard_links.next, struct yaffs_obj,
-+ hard_links);
-+
-+ yaffs_get_obj_name(hl, name, YAFFS_MAX_NAME_LENGTH + 1);
-+ parent = hl->parent;
-+
-+ list_del_init(&hl->hard_links);
-+
-+ yaffs_add_obj_to_dir(obj->my_dev->unlinked_dir, hl);
-+
-+ ret_val = yaffs_change_obj_name(obj, parent, name, 0, 0);
-+
-+ if (ret_val == YAFFS_OK)
-+ ret_val = yaffs_generic_obj_del(hl);
-+
-+ return ret_val;
-+
-+ } else if (del_now) {
-+ switch (obj->variant_type) {
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ return yaffs_del_file(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ list_del_init(&obj->variant.dir_variant.dirty);
-+ return yaffs_del_dir(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ return yaffs_del_symlink(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ return yaffs_generic_obj_del(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ default:
-+ return YAFFS_FAIL;
-+ }
-+ } else if (yaffs_is_non_empty_dir(obj)) {
-+ return YAFFS_FAIL;
-+ } else {
-+ return yaffs_change_obj_name(obj, obj->my_dev->unlinked_dir,
-+ _Y("unlinked"), 0, 0);
-+ }
-+}
-+
-+static int yaffs_unlink_obj(struct yaffs_obj *obj)
-+{
-+ if (obj && obj->unlink_allowed)
-+ return yaffs_unlink_worker(obj);
-+
-+ return YAFFS_FAIL;
-+}
-+
-+int yaffs_unlinker(struct yaffs_obj *dir, const YCHAR *name)
-+{
-+ struct yaffs_obj *obj;
-+
-+ obj = yaffs_find_by_name(dir, name);
-+ return yaffs_unlink_obj(obj);
-+}
-+
-+/* Note:
-+ * If old_name is NULL then we take old_dir as the object to be renamed.
-+ */
-+int yaffs_rename_obj(struct yaffs_obj *old_dir, const YCHAR *old_name,
-+ struct yaffs_obj *new_dir, const YCHAR *new_name)
-+{
-+ struct yaffs_obj *obj = NULL;
-+ struct yaffs_obj *existing_target = NULL;
-+ int force = 0;
-+ int result;
-+ struct yaffs_dev *dev;
-+
-+ if (!old_dir || old_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ BUG();
-+ return YAFFS_FAIL;
-+ }
-+ if (!new_dir || new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ BUG();
-+ return YAFFS_FAIL;
-+ }
-+
-+ dev = old_dir->my_dev;
-+
-+#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
-+ /* Special case for case insemsitive systems.
-+ * While look-up is case insensitive, the name isn't.
-+ * Therefore we might want to change x.txt to X.txt
-+ */
-+ if (old_dir == new_dir &&
-+ old_name && new_name &&
-+ strcmp(old_name, new_name) == 0)
-+ force = 1;
-+#endif
-+
-+ if (strnlen(new_name, YAFFS_MAX_NAME_LENGTH + 1) >
-+ YAFFS_MAX_NAME_LENGTH)
-+ /* ENAMETOOLONG */
-+ return YAFFS_FAIL;
-+
-+ if (old_name)
-+ obj = yaffs_find_by_name(old_dir, old_name);
-+ else{
-+ obj = old_dir;
-+ old_dir = obj->parent;
-+ }
-+
-+ if (obj && obj->rename_allowed) {
-+ /* Now handle an existing target, if there is one */
-+ existing_target = yaffs_find_by_name(new_dir, new_name);
-+ if (yaffs_is_non_empty_dir(existing_target)) {
-+ return YAFFS_FAIL; /* ENOTEMPTY */
-+ } else if (existing_target && existing_target != obj) {
-+ /* Nuke the target first, using shadowing,
-+ * but only if it isn't the same object.
-+ *
-+ * Note we must disable gc here otherwise it can mess
-+ * up the shadowing.
-+ *
-+ */
-+ dev->gc_disable = 1;
-+ yaffs_change_obj_name(obj, new_dir, new_name, force,
-+ existing_target->obj_id);
-+ existing_target->is_shadowed = 1;
-+ yaffs_unlink_obj(existing_target);
-+ dev->gc_disable = 0;
-+ }
-+
-+ result = yaffs_change_obj_name(obj, new_dir, new_name, 1, 0);
-+
-+ yaffs_update_parent(old_dir);
-+ if (new_dir != old_dir)
-+ yaffs_update_parent(new_dir);
-+
-+ return result;
-+ }
-+ return YAFFS_FAIL;
-+}
-+
-+/*----------------------- Initialisation Scanning ---------------------- */
-+
-+void yaffs_handle_shadowed_obj(struct yaffs_dev *dev, int obj_id,
-+ int backward_scanning)
-+{
-+ struct yaffs_obj *obj;
-+
-+ if (backward_scanning) {
-+ /* Handle YAFFS2 case (backward scanning)
-+ * If the shadowed object exists then ignore.
-+ */
-+ obj = yaffs_find_by_number(dev, obj_id);
-+ if (obj)
-+ return;
-+ }
-+
-+ /* Let's create it (if it does not exist) assuming it is a file so that
-+ * it can do shrinking etc.
-+ * We put it in unlinked dir to be cleaned up after the scanning
-+ */
-+ obj =
-+ yaffs_find_or_create_by_number(dev, obj_id, YAFFS_OBJECT_TYPE_FILE);
-+ if (!obj)
-+ return;
-+ obj->is_shadowed = 1;
-+ yaffs_add_obj_to_dir(dev->unlinked_dir, obj);
-+ obj->variant.file_variant.shrink_size = 0;
-+ obj->valid = 1; /* So that we don't read any other info. */
-+}
-+
-+void yaffs_link_fixup(struct yaffs_dev *dev, struct list_head *hard_list)
-+{
-+ struct list_head *lh;
-+ struct list_head *save;
-+ struct yaffs_obj *hl;
-+ struct yaffs_obj *in;
-+
-+ list_for_each_safe(lh, save, hard_list) {
-+ hl = list_entry(lh, struct yaffs_obj, hard_links);
-+ in = yaffs_find_by_number(dev,
-+ hl->variant.hardlink_variant.equiv_id);
-+
-+ if (in) {
-+ /* Add the hardlink pointers */
-+ hl->variant.hardlink_variant.equiv_obj = in;
-+ list_add(&hl->hard_links, &in->hard_links);
-+ } else {
-+ /* Todo Need to report/handle this better.
-+ * Got a problem... hardlink to a non-existant object
-+ */
-+ hl->variant.hardlink_variant.equiv_obj = NULL;
-+ INIT_LIST_HEAD(&hl->hard_links);
-+ }
-+ }
-+}
-+
-+static void yaffs_strip_deleted_objs(struct yaffs_dev *dev)
-+{
-+ /*
-+ * Sort out state of unlinked and deleted objects after scanning.
-+ */
-+ struct list_head *i;
-+ struct list_head *n;
-+ struct yaffs_obj *l;
-+
-+ if (dev->read_only)
-+ return;
-+
-+ /* Soft delete all the unlinked files */
-+ list_for_each_safe(i, n,
-+ &dev->unlinked_dir->variant.dir_variant.children) {
-+ l = list_entry(i, struct yaffs_obj, siblings);
-+ yaffs_del_obj(l);
-+ }
-+
-+ list_for_each_safe(i, n, &dev->del_dir->variant.dir_variant.children) {
-+ l = list_entry(i, struct yaffs_obj, siblings);
-+ yaffs_del_obj(l);
-+ }
-+}
-+
-+/*
-+ * This code iterates through all the objects making sure that they are rooted.
-+ * Any unrooted objects are re-rooted in lost+found.
-+ * An object needs to be in one of:
-+ * - Directly under deleted, unlinked
-+ * - Directly or indirectly under root.
-+ *
-+ * Note:
-+ * This code assumes that we don't ever change the current relationships
-+ * between directories:
-+ * root_dir->parent == unlinked_dir->parent == del_dir->parent == NULL
-+ * lost-n-found->parent == root_dir
-+ *
-+ * This fixes the problem where directories might have inadvertently been
-+ * deleted leaving the object "hanging" without being rooted in the
-+ * directory tree.
-+ */
-+
-+static int yaffs_has_null_parent(struct yaffs_dev *dev, struct yaffs_obj *obj)
-+{
-+ return (obj == dev->del_dir ||
-+ obj == dev->unlinked_dir || obj == dev->root_dir);
-+}
-+
-+static void yaffs_fix_hanging_objs(struct yaffs_dev *dev)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_obj *parent;
-+ int i;
-+ struct list_head *lh;
-+ struct list_head *n;
-+ int depth_limit;
-+ int hanging;
-+
-+ if (dev->read_only)
-+ return;
-+
-+ /* Iterate through the objects in each hash entry,
-+ * looking at each object.
-+ * Make sure it is rooted.
-+ */
-+
-+ for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
-+ list_for_each_safe(lh, n, &dev->obj_bucket[i].list) {
-+ obj = list_entry(lh, struct yaffs_obj, hash_link);
-+ parent = obj->parent;
-+
-+ if (yaffs_has_null_parent(dev, obj)) {
-+ /* These directories are not hanging */
-+ hanging = 0;
-+ } else if (!parent ||
-+ parent->variant_type !=
-+ YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ hanging = 1;
-+ } else if (yaffs_has_null_parent(dev, parent)) {
-+ hanging = 0;
-+ } else {
-+ /*
-+ * Need to follow the parent chain to
-+ * see if it is hanging.
-+ */
-+ hanging = 0;
-+ depth_limit = 100;
-+
-+ while (parent != dev->root_dir &&
-+ parent->parent &&
-+ parent->parent->variant_type ==
-+ YAFFS_OBJECT_TYPE_DIRECTORY &&
-+ depth_limit > 0) {
-+ parent = parent->parent;
-+ depth_limit--;
-+ }
-+ if (parent != dev->root_dir)
-+ hanging = 1;
-+ }
-+ if (hanging) {
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ "Hanging object %d moved to lost and found",
-+ obj->obj_id);
-+ yaffs_add_obj_to_dir(dev->lost_n_found, obj);
-+ }
-+ }
-+ }
-+}
-+
-+/*
-+ * Delete directory contents for cleaning up lost and found.
-+ */
-+static void yaffs_del_dir_contents(struct yaffs_obj *dir)
-+{
-+ struct yaffs_obj *obj;
-+ struct list_head *lh;
-+ struct list_head *n;
-+
-+ if (dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
-+ BUG();
-+
-+ list_for_each_safe(lh, n, &dir->variant.dir_variant.children) {
-+ obj = list_entry(lh, struct yaffs_obj, siblings);
-+ if (obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY)
-+ yaffs_del_dir_contents(obj);
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ "Deleting lost_found object %d",
-+ obj->obj_id);
-+ yaffs_unlink_obj(obj);
-+ }
-+}
-+
-+static void yaffs_empty_l_n_f(struct yaffs_dev *dev)
-+{
-+ yaffs_del_dir_contents(dev->lost_n_found);
-+}
-+
-+
-+struct yaffs_obj *yaffs_find_by_name(struct yaffs_obj *directory,
-+ const YCHAR *name)
-+{
-+ int sum;
-+ struct list_head *i;
-+ YCHAR buffer[YAFFS_MAX_NAME_LENGTH + 1];
-+ struct yaffs_obj *l;
-+
-+ if (!name)
-+ return NULL;
-+
-+ if (!directory) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "tragedy: yaffs_find_by_name: null pointer directory"
-+ );
-+ BUG();
-+ return NULL;
-+ }
-+ if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "tragedy: yaffs_find_by_name: non-directory"
-+ );
-+ BUG();
-+ }
-+
-+ sum = yaffs_calc_name_sum(name);
-+
-+ list_for_each(i, &directory->variant.dir_variant.children) {
-+ l = list_entry(i, struct yaffs_obj, siblings);
-+
-+ if (l->parent != directory)
-+ BUG();
-+
-+ yaffs_check_obj_details_loaded(l);
-+
-+ /* Special case for lost-n-found */
-+ if (l->obj_id == YAFFS_OBJECTID_LOSTNFOUND) {
-+ if (!strcmp(name, YAFFS_LOSTNFOUND_NAME))
-+ return l;
-+ } else if (l->sum == sum || l->hdr_chunk <= 0) {
-+ /* LostnFound chunk called Objxxx
-+ * Do a real check
-+ */
-+ yaffs_get_obj_name(l, buffer,
-+ YAFFS_MAX_NAME_LENGTH + 1);
-+ if (!strncmp(name, buffer, YAFFS_MAX_NAME_LENGTH))
-+ return l;
-+ }
-+ }
-+ return NULL;
-+}
-+
-+/* GetEquivalentObject dereferences any hard links to get to the
-+ * actual object.
-+ */
-+
-+struct yaffs_obj *yaffs_get_equivalent_obj(struct yaffs_obj *obj)
-+{
-+ if (obj && obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) {
-+ obj = obj->variant.hardlink_variant.equiv_obj;
-+ yaffs_check_obj_details_loaded(obj);
-+ }
-+ return obj;
-+}
-+
-+/*
-+ * A note or two on object names.
-+ * * If the object name is missing, we then make one up in the form objnnn
-+ *
-+ * * ASCII names are stored in the object header's name field from byte zero
-+ * * Unicode names are historically stored starting from byte zero.
-+ *
-+ * Then there are automatic Unicode names...
-+ * The purpose of these is to save names in a way that can be read as
-+ * ASCII or Unicode names as appropriate, thus allowing a Unicode and ASCII
-+ * system to share files.
-+ *
-+ * These automatic unicode are stored slightly differently...
-+ * - If the name can fit in the ASCII character space then they are saved as
-+ * ascii names as per above.
-+ * - If the name needs Unicode then the name is saved in Unicode
-+ * starting at oh->name[1].
-+
-+ */
-+static void yaffs_fix_null_name(struct yaffs_obj *obj, YCHAR *name,
-+ int buffer_size)
-+{
-+ /* Create an object name if we could not find one. */
-+ if (strnlen(name, YAFFS_MAX_NAME_LENGTH) == 0) {
-+ YCHAR local_name[20];
-+ YCHAR num_string[20];
-+ YCHAR *x = &num_string[19];
-+ unsigned v = obj->obj_id;
-+ num_string[19] = 0;
-+ while (v > 0) {
-+ x--;
-+ *x = '0' + (v % 10);
-+ v /= 10;
-+ }
-+ /* make up a name */
-+ strcpy(local_name, YAFFS_LOSTNFOUND_PREFIX);
-+ strcat(local_name, x);
-+ strncpy(name, local_name, buffer_size - 1);
-+ }
-+}
-+
-+int yaffs_get_obj_name(struct yaffs_obj *obj, YCHAR *name, int buffer_size)
-+{
-+ memset(name, 0, buffer_size * sizeof(YCHAR));
-+ yaffs_check_obj_details_loaded(obj);
-+ if (obj->obj_id == YAFFS_OBJECTID_LOSTNFOUND) {
-+ strncpy(name, YAFFS_LOSTNFOUND_NAME, buffer_size - 1);
-+ } else if (obj->short_name[0]) {
-+ strcpy(name, obj->short_name);
-+ } else if (obj->hdr_chunk > 0) {
-+ int result;
-+ u8 *buffer = yaffs_get_temp_buffer(obj->my_dev);
-+
-+ struct yaffs_obj_hdr *oh = (struct yaffs_obj_hdr *)buffer;
-+
-+ memset(buffer, 0, obj->my_dev->data_bytes_per_chunk);
-+
-+ if (obj->hdr_chunk > 0) {
-+ result = yaffs_rd_chunk_tags_nand(obj->my_dev,
-+ obj->hdr_chunk,
-+ buffer, NULL);
-+ }
-+ yaffs_load_name_from_oh(obj->my_dev, name, oh->name,
-+ buffer_size);
-+
-+ yaffs_release_temp_buffer(obj->my_dev, buffer);
-+ }
-+
-+ yaffs_fix_null_name(obj, name, buffer_size);
-+
-+ return strnlen(name, YAFFS_MAX_NAME_LENGTH);
-+}
-+
-+loff_t yaffs_get_obj_length(struct yaffs_obj *obj)
-+{
-+ /* Dereference any hard linking */
-+ obj = yaffs_get_equivalent_obj(obj);
-+
-+ if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE)
-+ return obj->variant.file_variant.file_size;
-+ if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) {
-+ if (!obj->variant.symlink_variant.alias)
-+ return 0;
-+ return strnlen(obj->variant.symlink_variant.alias,
-+ YAFFS_MAX_ALIAS_LENGTH);
-+ } else {
-+ /* Only a directory should drop through to here */
-+ return obj->my_dev->data_bytes_per_chunk;
-+ }
-+}
-+
-+int yaffs_get_obj_link_count(struct yaffs_obj *obj)
-+{
-+ int count = 0;
-+ struct list_head *i;
-+
-+ if (!obj->unlinked)
-+ count++; /* the object itself */
-+
-+ list_for_each(i, &obj->hard_links)
-+ count++; /* add the hard links; */
-+
-+ return count;
-+}
-+
-+int yaffs_get_obj_inode(struct yaffs_obj *obj)
-+{
-+ obj = yaffs_get_equivalent_obj(obj);
-+
-+ return obj->obj_id;
-+}
-+
-+unsigned yaffs_get_obj_type(struct yaffs_obj *obj)
-+{
-+ obj = yaffs_get_equivalent_obj(obj);
-+
-+ switch (obj->variant_type) {
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ return DT_REG;
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ return DT_DIR;
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ return DT_LNK;
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ return DT_REG;
-+ break;
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ if (S_ISFIFO(obj->yst_mode))
-+ return DT_FIFO;
-+ if (S_ISCHR(obj->yst_mode))
-+ return DT_CHR;
-+ if (S_ISBLK(obj->yst_mode))
-+ return DT_BLK;
-+ if (S_ISSOCK(obj->yst_mode))
-+ return DT_SOCK;
-+ return DT_REG;
-+ break;
-+ default:
-+ return DT_REG;
-+ break;
-+ }
-+}
-+
-+YCHAR *yaffs_get_symlink_alias(struct yaffs_obj *obj)
-+{
-+ obj = yaffs_get_equivalent_obj(obj);
-+ if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK)
-+ return yaffs_clone_str(obj->variant.symlink_variant.alias);
-+ else
-+ return yaffs_clone_str(_Y(""));
-+}
-+
-+/*--------------------------- Initialisation code -------------------------- */
-+
-+static int yaffs_check_dev_fns(struct yaffs_dev *dev)
-+{
-+ struct yaffs_driver *drv = &dev->drv;
-+ struct yaffs_tags_handler *tagger = &dev->tagger;
-+
-+ /* Common functions, gotta have */
-+ if (!drv->drv_read_chunk_fn ||
-+ !drv->drv_write_chunk_fn ||
-+ !drv->drv_erase_fn)
-+ return 0;
-+
-+ if (dev->param.is_yaffs2 &&
-+ (!drv->drv_mark_bad_fn || !drv->drv_check_bad_fn))
-+ return 0;
-+
-+ /* Install the default tags marshalling functions if needed. */
-+ yaffs_tags_compat_install(dev);
-+ yaffs_tags_marshall_install(dev);
-+
-+ /* Check we now have the marshalling functions required. */
-+ if (!tagger->write_chunk_tags_fn ||
-+ !tagger->read_chunk_tags_fn ||
-+ !tagger->query_block_fn ||
-+ !tagger->mark_bad_fn)
-+ return 0;
-+
-+ return 1;
-+}
-+
-+static int yaffs_create_initial_dir(struct yaffs_dev *dev)
-+{
-+ /* Initialise the unlinked, deleted, root and lost+found directories */
-+ dev->lost_n_found = dev->root_dir = NULL;
-+ dev->unlinked_dir = dev->del_dir = NULL;
-+ dev->unlinked_dir =
-+ yaffs_create_fake_dir(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR);
-+ dev->del_dir =
-+ yaffs_create_fake_dir(dev, YAFFS_OBJECTID_DELETED, S_IFDIR);
-+ dev->root_dir =
-+ yaffs_create_fake_dir(dev, YAFFS_OBJECTID_ROOT,
-+ YAFFS_ROOT_MODE | S_IFDIR);
-+ dev->lost_n_found =
-+ yaffs_create_fake_dir(dev, YAFFS_OBJECTID_LOSTNFOUND,
-+ YAFFS_LOSTNFOUND_MODE | S_IFDIR);
-+
-+ if (dev->lost_n_found && dev->root_dir && dev->unlinked_dir
-+ && dev->del_dir) {
-+ yaffs_add_obj_to_dir(dev->root_dir, dev->lost_n_found);
-+ return YAFFS_OK;
-+ }
-+ return YAFFS_FAIL;
-+}
-+
-+/* Low level init.
-+ * Typically only used by yaffs_guts_initialise, but also used by the
-+ * Low level yaffs driver tests.
-+ */
-+
-+int yaffs_guts_ll_init(struct yaffs_dev *dev)
-+{
-+
-+
-+ yaffs_trace(YAFFS_TRACE_TRACING, "yaffs: yaffs_ll_init()");
-+
-+ if (!dev) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs: Need a device"
-+ );
-+ return YAFFS_FAIL;
-+ }
-+
-+ if (dev->ll_init)
-+ return YAFFS_OK;
-+
-+ dev->internal_start_block = dev->param.start_block;
-+ dev->internal_end_block = dev->param.end_block;
-+ dev->block_offset = 0;
-+ dev->chunk_offset = 0;
-+ dev->n_free_chunks = 0;
-+
-+ dev->gc_block = 0;
-+
-+ if (dev->param.start_block == 0) {
-+ dev->internal_start_block = dev->param.start_block + 1;
-+ dev->internal_end_block = dev->param.end_block + 1;
-+ dev->block_offset = 1;
-+ dev->chunk_offset = dev->param.chunks_per_block;
-+ }
-+
-+ /* Check geometry parameters. */
-+
-+ if ((!dev->param.inband_tags && dev->param.is_yaffs2 &&
-+ dev->param.total_bytes_per_chunk < 1024) ||
-+ (!dev->param.is_yaffs2 &&
-+ dev->param.total_bytes_per_chunk < 512) ||
-+ (dev->param.inband_tags && !dev->param.is_yaffs2) ||
-+ dev->param.chunks_per_block < 2 ||
-+ dev->param.n_reserved_blocks < 2 ||
-+ dev->internal_start_block <= 0 ||
-+ dev->internal_end_block <= 0 ||
-+ dev->internal_end_block <=
-+ (dev->internal_start_block + dev->param.n_reserved_blocks + 2)
-+ ) {
-+ /* otherwise it is too small */
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "NAND geometry problems: chunk size %d, type is yaffs%s, inband_tags %d ",
-+ dev->param.total_bytes_per_chunk,
-+ dev->param.is_yaffs2 ? "2" : "",
-+ dev->param.inband_tags);
-+ return YAFFS_FAIL;
-+ }
-+
-+ /* Sort out space for inband tags, if required */
-+ if (dev->param.inband_tags)
-+ dev->data_bytes_per_chunk =
-+ dev->param.total_bytes_per_chunk -
-+ sizeof(struct yaffs_packed_tags2_tags_only);
-+ else
-+ dev->data_bytes_per_chunk = dev->param.total_bytes_per_chunk;
-+
-+ /* Got the right mix of functions? */
-+ if (!yaffs_check_dev_fns(dev)) {
-+ /* Function missing */
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "device function(s) missing or wrong");
-+
-+ return YAFFS_FAIL;
-+ }
-+
-+ if (yaffs_init_nand(dev) != YAFFS_OK) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "InitialiseNAND failed");
-+ return YAFFS_FAIL;
-+ }
-+
-+ return YAFFS_OK;
-+}
-+
-+
-+int yaffs_guts_format_dev(struct yaffs_dev *dev)
-+{
-+ int i;
-+ enum yaffs_block_state state;
-+ u32 dummy;
-+
-+ if(yaffs_guts_ll_init(dev) != YAFFS_OK)
-+ return YAFFS_FAIL;
-+
-+ if(dev->is_mounted)
-+ return YAFFS_FAIL;
-+
-+ for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
-+ yaffs_query_init_block_state(dev, i, &state, &dummy);
-+ if (state != YAFFS_BLOCK_STATE_DEAD)
-+ yaffs_erase_block(dev, i);
-+ }
-+
-+ return YAFFS_OK;
-+}
-+
-+
-+int yaffs_guts_initialise(struct yaffs_dev *dev)
-+{
-+ int init_failed = 0;
-+ unsigned x;
-+ int bits;
-+
-+ if(yaffs_guts_ll_init(dev) != YAFFS_OK)
-+ return YAFFS_FAIL;
-+
-+ if (dev->is_mounted) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "device already mounted");
-+ return YAFFS_FAIL;
-+ }
-+
-+ dev->is_mounted = 1;
-+
-+ /* OK now calculate a few things for the device */
-+
-+ /*
-+ * Calculate all the chunk size manipulation numbers:
-+ */
-+ x = dev->data_bytes_per_chunk;
-+ /* We always use dev->chunk_shift and dev->chunk_div */
-+ dev->chunk_shift = calc_shifts(x);
-+ x >>= dev->chunk_shift;
-+ dev->chunk_div = x;
-+ /* We only use chunk mask if chunk_div is 1 */
-+ dev->chunk_mask = (1 << dev->chunk_shift) - 1;
-+
-+ /*
-+ * Calculate chunk_grp_bits.
-+ * We need to find the next power of 2 > than internal_end_block
-+ */
-+
-+ x = dev->param.chunks_per_block * (dev->internal_end_block + 1);
-+
-+ bits = calc_shifts_ceiling(x);
-+
-+ /* Set up tnode width if wide tnodes are enabled. */
-+ if (!dev->param.wide_tnodes_disabled) {
-+ /* bits must be even so that we end up with 32-bit words */
-+ if (bits & 1)
-+ bits++;
-+ if (bits < 16)
-+ dev->tnode_width = 16;
-+ else
-+ dev->tnode_width = bits;
-+ } else {
-+ dev->tnode_width = 16;
-+ }
-+
-+ dev->tnode_mask = (1 << dev->tnode_width) - 1;
-+
-+ /* Level0 Tnodes are 16 bits or wider (if wide tnodes are enabled),
-+ * so if the bitwidth of the
-+ * chunk range we're using is greater than 16 we need
-+ * to figure out chunk shift and chunk_grp_size
-+ */
-+
-+ if (bits <= dev->tnode_width)
-+ dev->chunk_grp_bits = 0;
-+ else
-+ dev->chunk_grp_bits = bits - dev->tnode_width;
-+
-+ dev->tnode_size = (dev->tnode_width * YAFFS_NTNODES_LEVEL0) / 8;
-+ if (dev->tnode_size < sizeof(struct yaffs_tnode))
-+ dev->tnode_size = sizeof(struct yaffs_tnode);
-+
-+ dev->chunk_grp_size = 1 << dev->chunk_grp_bits;
-+
-+ if (dev->param.chunks_per_block < dev->chunk_grp_size) {
-+ /* We have a problem because the soft delete won't work if
-+ * the chunk group size > chunks per block.
-+ * This can be remedied by using larger "virtual blocks".
-+ */
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "chunk group too large");
-+
-+ return YAFFS_FAIL;
-+ }
-+
-+ /* Finished verifying the device, continue with initialisation */
-+
-+ /* More device initialisation */
-+ dev->all_gcs = 0;
-+ dev->passive_gc_count = 0;
-+ dev->oldest_dirty_gc_count = 0;
-+ dev->bg_gcs = 0;
-+ dev->gc_block_finder = 0;
-+ dev->buffered_block = -1;
-+ dev->doing_buffered_block_rewrite = 0;
-+ dev->n_deleted_files = 0;
-+ dev->n_bg_deletions = 0;
-+ dev->n_unlinked_files = 0;
-+ dev->n_ecc_fixed = 0;
-+ dev->n_ecc_unfixed = 0;
-+ dev->n_tags_ecc_fixed = 0;
-+ dev->n_tags_ecc_unfixed = 0;
-+ dev->n_erase_failures = 0;
-+ dev->n_erased_blocks = 0;
-+ dev->gc_disable = 0;
-+ dev->has_pending_prioritised_gc = 1;
-+ /* Assume the worst for now, will get fixed on first GC */
-+ INIT_LIST_HEAD(&dev->dirty_dirs);
-+ dev->oldest_dirty_seq = 0;
-+ dev->oldest_dirty_block = 0;
-+
-+ /* Initialise temporary buffers and caches. */
-+ if (!yaffs_init_tmp_buffers(dev))
-+ init_failed = 1;
-+
-+ dev->cache = NULL;
-+ dev->gc_cleanup_list = NULL;
-+
-+ if (!init_failed && dev->param.n_caches > 0) {
-+ int i;
-+ void *buf;
-+ int cache_bytes =
-+ dev->param.n_caches * sizeof(struct yaffs_cache);
-+
-+ if (dev->param.n_caches > YAFFS_MAX_SHORT_OP_CACHES)
-+ dev->param.n_caches = YAFFS_MAX_SHORT_OP_CACHES;
-+
-+ dev->cache = kmalloc(cache_bytes, GFP_NOFS);
-+
-+ buf = (u8 *) dev->cache;
-+
-+ if (dev->cache)
-+ memset(dev->cache, 0, cache_bytes);
-+
-+ for (i = 0; i < dev->param.n_caches && buf; i++) {
-+ dev->cache[i].object = NULL;
-+ dev->cache[i].last_use = 0;
-+ dev->cache[i].dirty = 0;
-+ dev->cache[i].data = buf =
-+ kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS);
-+ }
-+ if (!buf)
-+ init_failed = 1;
-+
-+ dev->cache_last_use = 0;
-+ }
-+
-+ dev->cache_hits = 0;
-+
-+ if (!init_failed) {
-+ dev->gc_cleanup_list =
-+ kmalloc(dev->param.chunks_per_block * sizeof(u32),
-+ GFP_NOFS);
-+ if (!dev->gc_cleanup_list)
-+ init_failed = 1;
-+ }
-+
-+ if (dev->param.is_yaffs2)
-+ dev->param.use_header_file_size = 1;
-+
-+ if (!init_failed && !yaffs_init_blocks(dev))
-+ init_failed = 1;
-+
-+ yaffs_init_tnodes_and_objs(dev);
-+
-+ if (!init_failed && !yaffs_create_initial_dir(dev))
-+ init_failed = 1;
-+
-+ if (!init_failed && dev->param.is_yaffs2 &&
-+ !dev->param.disable_summary &&
-+ !yaffs_summary_init(dev))
-+ init_failed = 1;
-+
-+ if (!init_failed) {
-+ /* Now scan the flash. */
-+ if (dev->param.is_yaffs2) {
-+ if (yaffs2_checkpt_restore(dev)) {
-+ yaffs_check_obj_details_loaded(dev->root_dir);
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT |
-+ YAFFS_TRACE_MOUNT,
-+ "yaffs: restored from checkpoint"
-+ );
-+ } else {
-+
-+ /* Clean up the mess caused by an aborted
-+ * checkpoint load then scan backwards.
-+ */
-+ yaffs_deinit_blocks(dev);
-+
-+ yaffs_deinit_tnodes_and_objs(dev);
-+
-+ dev->n_erased_blocks = 0;
-+ dev->n_free_chunks = 0;
-+ dev->alloc_block = -1;
-+ dev->alloc_page = -1;
-+ dev->n_deleted_files = 0;
-+ dev->n_unlinked_files = 0;
-+ dev->n_bg_deletions = 0;
-+
-+ if (!init_failed && !yaffs_init_blocks(dev))
-+ init_failed = 1;
-+
-+ yaffs_init_tnodes_and_objs(dev);
-+
-+ if (!init_failed
-+ && !yaffs_create_initial_dir(dev))
-+ init_failed = 1;
-+
-+ if (!init_failed && !yaffs2_scan_backwards(dev))
-+ init_failed = 1;
-+ }
-+ } else if (!yaffs1_scan(dev)) {
-+ init_failed = 1;
-+ }
-+
-+ yaffs_strip_deleted_objs(dev);
-+ yaffs_fix_hanging_objs(dev);
-+ if (dev->param.empty_lost_n_found)
-+ yaffs_empty_l_n_f(dev);
-+ }
-+
-+ if (init_failed) {
-+ /* Clean up the mess */
-+ yaffs_trace(YAFFS_TRACE_TRACING,
-+ "yaffs: yaffs_guts_initialise() aborted.");
-+
-+ yaffs_deinitialise(dev);
-+ return YAFFS_FAIL;
-+ }
-+
-+ /* Zero out stats */
-+ dev->n_page_reads = 0;
-+ dev->n_page_writes = 0;
-+ dev->n_erasures = 0;
-+ dev->n_gc_copies = 0;
-+ dev->n_retried_writes = 0;
-+
-+ dev->n_retired_blocks = 0;
-+
-+ yaffs_verify_free_chunks(dev);
-+ yaffs_verify_blocks(dev);
-+
-+ /* Clean up any aborted checkpoint data */
-+ if (!dev->is_checkpointed && dev->blocks_in_checkpt > 0)
-+ yaffs2_checkpt_invalidate(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_TRACING,
-+ "yaffs: yaffs_guts_initialise() done.");
-+ return YAFFS_OK;
-+}
-+
-+void yaffs_deinitialise(struct yaffs_dev *dev)
-+{
-+ if (dev->is_mounted) {
-+ int i;
-+
-+ yaffs_deinit_blocks(dev);
-+ yaffs_deinit_tnodes_and_objs(dev);
-+ yaffs_summary_deinit(dev);
-+
-+ if (dev->param.n_caches > 0 && dev->cache) {
-+
-+ for (i = 0; i < dev->param.n_caches; i++) {
-+ kfree(dev->cache[i].data);
-+ dev->cache[i].data = NULL;
-+ }
-+
-+ kfree(dev->cache);
-+ dev->cache = NULL;
-+ }
-+
-+ kfree(dev->gc_cleanup_list);
-+
-+ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
-+ kfree(dev->temp_buffer[i].buffer);
-+
-+ dev->is_mounted = 0;
-+
-+ yaffs_deinit_nand(dev);
-+ }
-+}
-+
-+int yaffs_count_free_chunks(struct yaffs_dev *dev)
-+{
-+ int n_free = 0;
-+ int b;
-+ struct yaffs_block_info *blk;
-+
-+ blk = dev->block_info;
-+ for (b = dev->internal_start_block; b <= dev->internal_end_block; b++) {
-+ switch (blk->block_state) {
-+ case YAFFS_BLOCK_STATE_EMPTY:
-+ case YAFFS_BLOCK_STATE_ALLOCATING:
-+ case YAFFS_BLOCK_STATE_COLLECTING:
-+ case YAFFS_BLOCK_STATE_FULL:
-+ n_free +=
-+ (dev->param.chunks_per_block - blk->pages_in_use +
-+ blk->soft_del_pages);
-+ break;
-+ default:
-+ break;
-+ }
-+ blk++;
-+ }
-+ return n_free;
-+}
-+
-+int yaffs_get_n_free_chunks(struct yaffs_dev *dev)
-+{
-+ /* This is what we report to the outside world */
-+ int n_free;
-+ int n_dirty_caches;
-+ int blocks_for_checkpt;
-+ int i;
-+
-+ n_free = dev->n_free_chunks;
-+ n_free += dev->n_deleted_files;
-+
-+ /* Now count and subtract the number of dirty chunks in the cache. */
-+
-+ for (n_dirty_caches = 0, i = 0; i < dev->param.n_caches; i++) {
-+ if (dev->cache[i].dirty)
-+ n_dirty_caches++;
-+ }
-+
-+ n_free -= n_dirty_caches;
-+
-+ n_free -=
-+ ((dev->param.n_reserved_blocks + 1) * dev->param.chunks_per_block);
-+
-+ /* Now figure checkpoint space and report that... */
-+ blocks_for_checkpt = yaffs_calc_checkpt_blocks_required(dev);
-+
-+ n_free -= (blocks_for_checkpt * dev->param.chunks_per_block);
-+
-+ if (n_free < 0)
-+ n_free = 0;
-+
-+ return n_free;
-+}
-+
-+
-+
-+/*
-+ * Marshalling functions to get loff_t file sizes into and out of
-+ * object headers.
-+ */
-+void yaffs_oh_size_load(struct yaffs_obj_hdr *oh, loff_t fsize)
-+{
-+ oh->file_size_low = (fsize & 0xFFFFFFFF);
-+ oh->file_size_high = ((fsize >> 32) & 0xFFFFFFFF);
-+}
-+
-+loff_t yaffs_oh_to_size(struct yaffs_obj_hdr *oh)
-+{
-+ loff_t retval;
-+
-+ if (sizeof(loff_t) >= 8 && ~(oh->file_size_high))
-+ retval = (((loff_t) oh->file_size_high) << 32) |
-+ (((loff_t) oh->file_size_low) & 0xFFFFFFFF);
-+ else
-+ retval = (loff_t) oh->file_size_low;
-+
-+ return retval;
-+}
-+
-+
-+void yaffs_count_blocks_by_state(struct yaffs_dev *dev, int bs[10])
-+{
-+ int i;
-+ struct yaffs_block_info *bi;
-+ int s;
-+
-+ for(i = 0; i < 10; i++)
-+ bs[i] = 0;
-+
-+ for(i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
-+ bi = yaffs_get_block_info(dev, i);
-+ s = bi->block_state;
-+ if(s > YAFFS_BLOCK_STATE_DEAD || s < YAFFS_BLOCK_STATE_UNKNOWN)
-+ bs[0]++;
-+ else
-+ bs[s]++;
-+ }
-+}
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_guts.h linux-3.10.40/fs/yaffs2/yaffs_guts.h
---- linux-3.10.40.orig/fs/yaffs2/yaffs_guts.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_guts.h 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,1007 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_GUTS_H__
-+#define __YAFFS_GUTS_H__
-+
-+#include "yportenv.h"
-+
-+#define YAFFS_OK 1
-+#define YAFFS_FAIL 0
-+
-+/* Give us a Y=0x59,
-+ * Give us an A=0x41,
-+ * Give us an FF=0xff
-+ * Give us an S=0x53
-+ * And what have we got...
-+ */
-+#define YAFFS_MAGIC 0x5941ff53
-+
-+/*
-+ * Tnodes form a tree with the tnodes in "levels"
-+ * Levels greater than 0 hold 8 slots which point to other tnodes.
-+ * Those at level 0 hold 16 slots which point to chunks in NAND.
-+ *
-+ * A maximum level of 8 thust supports files of size up to:
-+ *
-+ * 2^(3*MAX_LEVEL+4)
-+ *
-+ * Thus a max level of 8 supports files with up to 2^^28 chunks which gives
-+ * a maximum file size of around 512Gbytees with 2k chunks.
-+ */
-+#define YAFFS_NTNODES_LEVEL0 16
-+#define YAFFS_TNODES_LEVEL0_BITS 4
-+#define YAFFS_TNODES_LEVEL0_MASK 0xf
-+
-+#define YAFFS_NTNODES_INTERNAL (YAFFS_NTNODES_LEVEL0 / 2)
-+#define YAFFS_TNODES_INTERNAL_BITS (YAFFS_TNODES_LEVEL0_BITS - 1)
-+#define YAFFS_TNODES_INTERNAL_MASK 0x7
-+#define YAFFS_TNODES_MAX_LEVEL 8
-+#define YAFFS_TNODES_MAX_BITS (YAFFS_TNODES_LEVEL0_BITS + \
-+ YAFFS_TNODES_INTERNAL_BITS * \
-+ YAFFS_TNODES_MAX_LEVEL)
-+#define YAFFS_MAX_CHUNK_ID ((1 << YAFFS_TNODES_MAX_BITS) - 1)
-+
-+#define YAFFS_MAX_FILE_SIZE_32 0x7fffffff
-+
-+/* Constants for YAFFS1 mode */
-+#define YAFFS_BYTES_PER_SPARE 16
-+#define YAFFS_BYTES_PER_CHUNK 512
-+#define YAFFS_CHUNK_SIZE_SHIFT 9
-+#define YAFFS_CHUNKS_PER_BLOCK 32
-+#define YAFFS_BYTES_PER_BLOCK (YAFFS_CHUNKS_PER_BLOCK*YAFFS_BYTES_PER_CHUNK)
-+
-+#define YAFFS_MIN_YAFFS2_CHUNK_SIZE 1024
-+#define YAFFS_MIN_YAFFS2_SPARE_SIZE 32
-+
-+
-+
-+#define YAFFS_ALLOCATION_NOBJECTS 100
-+#define YAFFS_ALLOCATION_NTNODES 100
-+#define YAFFS_ALLOCATION_NLINKS 100
-+
-+#define YAFFS_NOBJECT_BUCKETS 256
-+
-+#define YAFFS_OBJECT_SPACE 0x40000
-+#define YAFFS_MAX_OBJECT_ID (YAFFS_OBJECT_SPACE - 1)
-+
-+/* Binary data version stamps */
-+#define YAFFS_SUMMARY_VERSION 1
-+#define YAFFS_CHECKPOINT_VERSION 7
-+
-+#ifdef CONFIG_YAFFS_UNICODE
-+#define YAFFS_MAX_NAME_LENGTH 127
-+#define YAFFS_MAX_ALIAS_LENGTH 79
-+#else
-+#define YAFFS_MAX_NAME_LENGTH 255
-+#define YAFFS_MAX_ALIAS_LENGTH 159
-+#endif
-+
-+#define YAFFS_SHORT_NAME_LENGTH 15
-+
-+/* Some special object ids for pseudo objects */
-+#define YAFFS_OBJECTID_ROOT 1
-+#define YAFFS_OBJECTID_LOSTNFOUND 2
-+#define YAFFS_OBJECTID_UNLINKED 3
-+#define YAFFS_OBJECTID_DELETED 4
-+
-+/* Fake object Id for summary data */
-+#define YAFFS_OBJECTID_SUMMARY 0x10
-+
-+/* Pseudo object ids for checkpointing */
-+#define YAFFS_OBJECTID_CHECKPOINT_DATA 0x20
-+#define YAFFS_SEQUENCE_CHECKPOINT_DATA 0x21
-+
-+#define YAFFS_MAX_SHORT_OP_CACHES 20
-+
-+#define YAFFS_N_TEMP_BUFFERS 6
-+
-+/* We limit the number attempts at sucessfully saving a chunk of data.
-+ * Small-page devices have 32 pages per block; large-page devices have 64.
-+ * Default to something in the order of 5 to 10 blocks worth of chunks.
-+ */
-+#define YAFFS_WR_ATTEMPTS (5*64)
-+
-+/* Sequence numbers are used in YAFFS2 to determine block allocation order.
-+ * The range is limited slightly to help distinguish bad numbers from good.
-+ * This also allows us to perhaps in the future use special numbers for
-+ * special purposes.
-+ * EFFFFF00 allows the allocation of 8 blocks/second (~1Mbytes) for 15 years,
-+ * and is a larger number than the lifetime of a 2GB device.
-+ */
-+#define YAFFS_LOWEST_SEQUENCE_NUMBER 0x00001000
-+#define YAFFS_HIGHEST_SEQUENCE_NUMBER 0xefffff00
-+
-+/* Special sequence number for bad block that failed to be marked bad */
-+#define YAFFS_SEQUENCE_BAD_BLOCK 0xffff0000
-+
-+/* ChunkCache is used for short read/write operations.*/
-+struct yaffs_cache {
-+ struct yaffs_obj *object;
-+ int chunk_id;
-+ int last_use;
-+ int dirty;
-+ int n_bytes; /* Only valid if the cache is dirty */
-+ int locked; /* Can't push out or flush while locked. */
-+ u8 *data;
-+};
-+
-+/* yaffs1 tags structures in RAM
-+ * NB This uses bitfield. Bitfields should not straddle a u32 boundary
-+ * otherwise the structure size will get blown out.
-+ */
-+
-+struct yaffs_tags {
-+ u32 chunk_id:20;
-+ u32 serial_number:2;
-+ u32 n_bytes_lsb:10;
-+ u32 obj_id:18;
-+ u32 ecc:12;
-+ u32 n_bytes_msb:2;
-+};
-+
-+union yaffs_tags_union {
-+ struct yaffs_tags as_tags;
-+ u8 as_bytes[8];
-+};
-+
-+
-+/* Stuff used for extended tags in YAFFS2 */
-+
-+enum yaffs_ecc_result {
-+ YAFFS_ECC_RESULT_UNKNOWN,
-+ YAFFS_ECC_RESULT_NO_ERROR,
-+ YAFFS_ECC_RESULT_FIXED,
-+ YAFFS_ECC_RESULT_UNFIXED
-+};
-+
-+enum yaffs_obj_type {
-+ YAFFS_OBJECT_TYPE_UNKNOWN,
-+ YAFFS_OBJECT_TYPE_FILE,
-+ YAFFS_OBJECT_TYPE_SYMLINK,
-+ YAFFS_OBJECT_TYPE_DIRECTORY,
-+ YAFFS_OBJECT_TYPE_HARDLINK,
-+ YAFFS_OBJECT_TYPE_SPECIAL
-+};
-+
-+#define YAFFS_OBJECT_TYPE_MAX YAFFS_OBJECT_TYPE_SPECIAL
-+
-+struct yaffs_ext_tags {
-+ unsigned chunk_used; /* Status of the chunk: used or unused */
-+ unsigned obj_id; /* If 0 this is not used */
-+ unsigned chunk_id; /* If 0 this is a header, else a data chunk */
-+ unsigned n_bytes; /* Only valid for data chunks */
-+
-+ /* The following stuff only has meaning when we read */
-+ enum yaffs_ecc_result ecc_result;
-+ unsigned block_bad;
-+
-+ /* YAFFS 1 stuff */
-+ unsigned is_deleted; /* The chunk is marked deleted */
-+ unsigned serial_number; /* Yaffs1 2-bit serial number */
-+
-+ /* YAFFS2 stuff */
-+ unsigned seq_number; /* The sequence number of this block */
-+
-+ /* Extra info if this is an object header (YAFFS2 only) */
-+
-+ unsigned extra_available; /* Extra info available if not zero */
-+ unsigned extra_parent_id; /* The parent object */
-+ unsigned extra_is_shrink; /* Is it a shrink header? */
-+ unsigned extra_shadows; /* Does this shadow another object? */
-+
-+ enum yaffs_obj_type extra_obj_type; /* What object type? */
-+
-+ loff_t extra_file_size; /* Length if it is a file */
-+ unsigned extra_equiv_id; /* Equivalent object for a hard link */
-+};
-+
-+/* Spare structure for YAFFS1 */
-+struct yaffs_spare {
-+ u8 tb0;
-+ u8 tb1;
-+ u8 tb2;
-+ u8 tb3;
-+ u8 page_status; /* set to 0 to delete the chunk */
-+ u8 block_status;
-+ u8 tb4;
-+ u8 tb5;
-+ u8 ecc1[3];
-+ u8 tb6;
-+ u8 tb7;
-+ u8 ecc2[3];
-+};
-+
-+/*Special structure for passing through to mtd */
-+struct yaffs_nand_spare {
-+ struct yaffs_spare spare;
-+ int eccres1;
-+ int eccres2;
-+};
-+
-+/* Block data in RAM */
-+
-+enum yaffs_block_state {
-+ YAFFS_BLOCK_STATE_UNKNOWN = 0,
-+
-+ YAFFS_BLOCK_STATE_SCANNING,
-+ /* Being scanned */
-+
-+ YAFFS_BLOCK_STATE_NEEDS_SCAN,
-+ /* The block might have something on it (ie it is allocating or full,
-+ * perhaps empty) but it needs to be scanned to determine its true
-+ * state.
-+ * This state is only valid during scanning.
-+ * NB We tolerate empty because the pre-scanner might be incapable of
-+ * deciding
-+ * However, if this state is returned on a YAFFS2 device,
-+ * then we expect a sequence number
-+ */
-+
-+ YAFFS_BLOCK_STATE_EMPTY,
-+ /* This block is empty */
-+
-+ YAFFS_BLOCK_STATE_ALLOCATING,
-+ /* This block is partially allocated.
-+ * At least one page holds valid data.
-+ * This is the one currently being used for page
-+ * allocation. Should never be more than one of these.
-+ * If a block is only partially allocated at mount it is treated as
-+ * full.
-+ */
-+
-+ YAFFS_BLOCK_STATE_FULL,
-+ /* All the pages in this block have been allocated.
-+ * If a block was only partially allocated when mounted we treat
-+ * it as fully allocated.
-+ */
-+
-+ YAFFS_BLOCK_STATE_DIRTY,
-+ /* The block was full and now all chunks have been deleted.
-+ * Erase me, reuse me.
-+ */
-+
-+ YAFFS_BLOCK_STATE_CHECKPOINT,
-+ /* This block is assigned to holding checkpoint data. */
-+
-+ YAFFS_BLOCK_STATE_COLLECTING,
-+ /* This block is being garbage collected */
-+
-+ YAFFS_BLOCK_STATE_DEAD
-+ /* This block has failed and is not in use */
-+};
-+
-+#define YAFFS_NUMBER_OF_BLOCK_STATES (YAFFS_BLOCK_STATE_DEAD + 1)
-+
-+struct yaffs_block_info {
-+
-+ s32 soft_del_pages:10; /* number of soft deleted pages */
-+ s32 pages_in_use:10; /* number of pages in use */
-+ u32 block_state:4; /* One of the above block states. */
-+ /* NB use unsigned because enum is sometimes
-+ * an int */
-+ u32 needs_retiring:1; /* Data has failed on this block, */
-+ /*need to get valid data off and retire*/
-+ u32 skip_erased_check:1;/* Skip the erased check on this block */
-+ u32 gc_prioritise:1; /* An ECC check or blank check has failed.
-+ Block should be prioritised for GC */
-+ u32 chunk_error_strikes:3; /* How many times we've had ecc etc
-+ failures on this block and tried to reuse it */
-+ u32 has_summary:1; /* The block has a summary */
-+
-+ u32 has_shrink_hdr:1; /* This block has at least one shrink header */
-+ u32 seq_number; /* block sequence number for yaffs2 */
-+
-+};
-+
-+/* -------------------------- Object structure -------------------------------*/
-+/* This is the object structure as stored on NAND */
-+
-+struct yaffs_obj_hdr {
-+ enum yaffs_obj_type type;
-+
-+ /* Apply to everything */
-+ int parent_obj_id;
-+ u16 sum_no_longer_used; /* checksum of name. No longer used */
-+ YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
-+
-+ /* The following apply to all object types except for hard links */
-+ u32 yst_mode; /* protection */
-+
-+ u32 yst_uid;
-+ u32 yst_gid;
-+ u32 yst_atime;
-+ u32 yst_mtime;
-+ u32 yst_ctime;
-+
-+ /* File size applies to files only */
-+ u32 file_size_low;
-+
-+ /* Equivalent object id applies to hard links only. */
-+ int equiv_id;
-+
-+ /* Alias is for symlinks only. */
-+ YCHAR alias[YAFFS_MAX_ALIAS_LENGTH + 1];
-+
-+ u32 yst_rdev; /* stuff for block and char devices (major/min) */
-+
-+ u32 win_ctime[2];
-+ u32 win_atime[2];
-+ u32 win_mtime[2];
-+
-+ u32 inband_shadowed_obj_id;
-+ u32 inband_is_shrink;
-+
-+ u32 file_size_high;
-+ u32 reserved[1];
-+ int shadows_obj; /* This object header shadows the
-+ specified object if > 0 */
-+
-+ /* is_shrink applies to object headers written when wemake a hole. */
-+ u32 is_shrink;
-+
-+};
-+
-+/*--------------------------- Tnode -------------------------- */
-+
-+struct yaffs_tnode {
-+ struct yaffs_tnode *internal[YAFFS_NTNODES_INTERNAL];
-+};
-+
-+/*------------------------ Object -----------------------------*/
-+/* An object can be one of:
-+ * - a directory (no data, has children links
-+ * - a regular file (data.... not prunes :->).
-+ * - a symlink [symbolic link] (the alias).
-+ * - a hard link
-+ */
-+
-+struct yaffs_file_var {
-+ loff_t file_size;
-+ loff_t scanned_size;
-+ loff_t shrink_size;
-+ int top_level;
-+ struct yaffs_tnode *top;
-+};
-+
-+struct yaffs_dir_var {
-+ struct list_head children; /* list of child links */
-+ struct list_head dirty; /* Entry for list of dirty directories */
-+};
-+
-+struct yaffs_symlink_var {
-+ YCHAR *alias;
-+};
-+
-+struct yaffs_hardlink_var {
-+ struct yaffs_obj *equiv_obj;
-+ u32 equiv_id;
-+};
-+
-+union yaffs_obj_var {
-+ struct yaffs_file_var file_variant;
-+ struct yaffs_dir_var dir_variant;
-+ struct yaffs_symlink_var symlink_variant;
-+ struct yaffs_hardlink_var hardlink_variant;
-+};
-+
-+struct yaffs_obj {
-+ u8 deleted:1; /* This should only apply to unlinked files. */
-+ u8 soft_del:1; /* it has also been soft deleted */
-+ u8 unlinked:1; /* An unlinked file.*/
-+ u8 fake:1; /* A fake object has no presence on NAND. */
-+ u8 rename_allowed:1; /* Some objects cannot be renamed. */
-+ u8 unlink_allowed:1;
-+ u8 dirty:1; /* the object needs to be written to flash */
-+ u8 valid:1; /* When the file system is being loaded up, this
-+ * object might be created before the data
-+ * is available
-+ * ie. file data chunks encountered before
-+ * the header.
-+ */
-+ u8 lazy_loaded:1; /* This object has been lazy loaded and
-+ * is missing some detail */
-+
-+ u8 defered_free:1; /* Object is removed from NAND, but is
-+ * still in the inode cache.
-+ * Free of object is defered.
-+ * until the inode is released.
-+ */
-+ u8 being_created:1; /* This object is still being created
-+ * so skip some verification checks. */
-+ u8 is_shadowed:1; /* This object is shadowed on the way
-+ * to being renamed. */
-+
-+ u8 xattr_known:1; /* We know if this has object has xattribs
-+ * or not. */
-+ u8 has_xattr:1; /* This object has xattribs.
-+ * Only valid if xattr_known. */
-+
-+ u8 serial; /* serial number of chunk in NAND.*/
-+ u16 sum; /* sum of the name to speed searching */
-+
-+ struct yaffs_dev *my_dev; /* The device I'm on */
-+
-+ struct list_head hash_link; /* list of objects in hash bucket */
-+
-+ struct list_head hard_links; /* hard linked object chain*/
-+
-+ /* directory structure stuff */
-+ /* also used for linking up the free list */
-+ struct yaffs_obj *parent;
-+ struct list_head siblings;
-+
-+ /* Where's my object header in NAND? */
-+ int hdr_chunk;
-+
-+ int n_data_chunks; /* Number of data chunks for this file. */
-+
-+ u32 obj_id; /* the object id value */
-+
-+ u32 yst_mode;
-+
-+ YCHAR short_name[YAFFS_SHORT_NAME_LENGTH + 1];
-+
-+#ifdef CONFIG_YAFFS_WINCE
-+ u32 win_ctime[2];
-+ u32 win_mtime[2];
-+ u32 win_atime[2];
-+#else
-+ u32 yst_uid;
-+ u32 yst_gid;
-+ u32 yst_atime;
-+ u32 yst_mtime;
-+ u32 yst_ctime;
-+#endif
-+
-+ u32 yst_rdev;
-+
-+ void *my_inode;
-+
-+ enum yaffs_obj_type variant_type;
-+
-+ union yaffs_obj_var variant;
-+
-+};
-+
-+struct yaffs_obj_bucket {
-+ struct list_head list;
-+ int count;
-+};
-+
-+/* yaffs_checkpt_obj holds the definition of an object as dumped
-+ * by checkpointing.
-+ */
-+
-+struct yaffs_checkpt_obj {
-+ int struct_type;
-+ u32 obj_id;
-+ u32 parent_id;
-+ int hdr_chunk;
-+ enum yaffs_obj_type variant_type:3;
-+ u8 deleted:1;
-+ u8 soft_del:1;
-+ u8 unlinked:1;
-+ u8 fake:1;
-+ u8 rename_allowed:1;
-+ u8 unlink_allowed:1;
-+ u8 serial;
-+ int n_data_chunks;
-+ loff_t size_or_equiv_obj;
-+};
-+
-+/*--------------------- Temporary buffers ----------------
-+ *
-+ * These are chunk-sized working buffers. Each device has a few.
-+ */
-+
-+struct yaffs_buffer {
-+ u8 *buffer;
-+ int in_use;
-+};
-+
-+/*----------------- Device ---------------------------------*/
-+
-+struct yaffs_param {
-+ const YCHAR *name;
-+
-+ /*
-+ * Entry parameters set up way early. Yaffs sets up the rest.
-+ * The structure should be zeroed out before use so that unused
-+ * and default values are zero.
-+ */
-+
-+ int inband_tags; /* Use unband tags */
-+ u32 total_bytes_per_chunk; /* Should be >= 512, does not need to
-+ be a power of 2 */
-+ int chunks_per_block; /* does not need to be a power of 2 */
-+ int spare_bytes_per_chunk; /* spare area size */
-+ int start_block; /* Start block we're allowed to use */
-+ int end_block; /* End block we're allowed to use */
-+ int n_reserved_blocks; /* Tuneable so that we can reduce
-+ * reserved blocks on NOR and RAM. */
-+
-+ int n_caches; /* If <= 0, then short op caching is disabled,
-+ * else the number of short op caches.
-+ */
-+ int cache_bypass_aligned; /* If non-zero then bypass the cache for
-+ * aligned writes.
-+ */
-+
-+ int use_nand_ecc; /* Flag to decide whether or not to use
-+ * NAND driver ECC on data (yaffs1) */
-+ int tags_9bytes; /* Use 9 byte tags */
-+ int no_tags_ecc; /* Flag to decide whether or not to do ECC
-+ * on packed tags (yaffs2) */
-+
-+ int is_yaffs2; /* Use yaffs2 mode on this device */
-+
-+ int empty_lost_n_found; /* Auto-empty lost+found directory on mount */
-+
-+ int refresh_period; /* How often to check for a block refresh */
-+
-+ /* Checkpoint control. Can be set before or after initialisation */
-+ u8 skip_checkpt_rd;
-+ u8 skip_checkpt_wr;
-+
-+ int enable_xattr; /* Enable xattribs */
-+
-+ int max_objects; /*
-+ * Set to limit the number of objects created.
-+ * 0 = no limit.
-+ */
-+
-+ /* The remove_obj_fn function must be supplied by OS flavours that
-+ * need it.
-+ * yaffs direct uses it to implement the faster readdir.
-+ * Linux uses it to protect the directory during unlocking.
-+ */
-+ void (*remove_obj_fn) (struct yaffs_obj *obj);
-+
-+ /* Callback to mark the superblock dirty */
-+ void (*sb_dirty_fn) (struct yaffs_dev *dev);
-+
-+ /* Callback to control garbage collection. */
-+ unsigned (*gc_control_fn) (struct yaffs_dev *dev);
-+
-+ /* Debug control flags. Don't use unless you know what you're doing */
-+ int use_header_file_size; /* Flag to determine if we should use
-+ * file sizes from the header */
-+ int disable_lazy_load; /* Disable lazy loading on this device */
-+ int wide_tnodes_disabled; /* Set to disable wide tnodes */
-+ int disable_soft_del; /* yaffs 1 only: Set to disable the use of
-+ * softdeletion. */
-+
-+ int defered_dir_update; /* Set to defer directory updates */
-+
-+#ifdef CONFIG_YAFFS_AUTO_UNICODE
-+ int auto_unicode;
-+#endif
-+ int always_check_erased; /* Force chunk erased check always on */
-+
-+ int disable_summary;
-+ int disable_bad_block_marking;
-+
-+};
-+
-+struct yaffs_driver {
-+ int (*drv_write_chunk_fn) (struct yaffs_dev *dev, int nand_chunk,
-+ const u8 *data, int data_len,
-+ const u8 *oob, int oob_len);
-+ int (*drv_read_chunk_fn) (struct yaffs_dev *dev, int nand_chunk,
-+ u8 *data, int data_len,
-+ u8 *oob, int oob_len,
-+ enum yaffs_ecc_result *ecc_result);
-+ int (*drv_erase_fn) (struct yaffs_dev *dev, int block_no);
-+ int (*drv_mark_bad_fn) (struct yaffs_dev *dev, int block_no);
-+ int (*drv_check_bad_fn) (struct yaffs_dev *dev, int block_no);
-+ int (*drv_initialise_fn) (struct yaffs_dev *dev);
-+ int (*drv_deinitialise_fn) (struct yaffs_dev *dev);
-+};
-+
-+struct yaffs_tags_handler {
-+ int (*write_chunk_tags_fn) (struct yaffs_dev *dev,
-+ int nand_chunk, const u8 *data,
-+ const struct yaffs_ext_tags *tags);
-+ int (*read_chunk_tags_fn) (struct yaffs_dev *dev,
-+ int nand_chunk, u8 *data,
-+ struct yaffs_ext_tags *tags);
-+
-+ int (*query_block_fn) (struct yaffs_dev *dev, int block_no,
-+ enum yaffs_block_state *state,
-+ u32 *seq_number);
-+ int (*mark_bad_fn) (struct yaffs_dev *dev, int block_no);
-+};
-+
-+struct yaffs_dev {
-+ struct yaffs_param param;
-+ struct yaffs_driver drv;
-+ struct yaffs_tags_handler tagger;
-+
-+ /* Context storage. Holds extra OS specific data for this device */
-+
-+ void *os_context;
-+ void *driver_context;
-+
-+ struct list_head dev_list;
-+
-+ int ll_init;
-+ /* Runtime parameters. Set up by YAFFS. */
-+ int data_bytes_per_chunk;
-+
-+ /* Non-wide tnode stuff */
-+ u16 chunk_grp_bits; /* Number of bits that need to be resolved if
-+ * the tnodes are not wide enough.
-+ */
-+ u16 chunk_grp_size; /* == 2^^chunk_grp_bits */
-+
-+ /* Stuff to support wide tnodes */
-+ u32 tnode_width;
-+ u32 tnode_mask;
-+ u32 tnode_size;
-+
-+ /* Stuff for figuring out file offset to chunk conversions */
-+ u32 chunk_shift; /* Shift value */
-+ u32 chunk_div; /* Divisor after shifting: 1 for 2^n sizes */
-+ u32 chunk_mask; /* Mask to use for power-of-2 case */
-+
-+ int is_mounted;
-+ int read_only;
-+ int is_checkpointed;
-+
-+ /* Stuff to support block offsetting to support start block zero */
-+ int internal_start_block;
-+ int internal_end_block;
-+ int block_offset;
-+ int chunk_offset;
-+
-+ /* Runtime checkpointing stuff */
-+ int checkpt_page_seq; /* running sequence number of checkpt pages */
-+ int checkpt_byte_count;
-+ int checkpt_byte_offs;
-+ u8 *checkpt_buffer;
-+ int checkpt_open_write;
-+ int blocks_in_checkpt;
-+ int checkpt_cur_chunk;
-+ int checkpt_cur_block;
-+ int checkpt_next_block;
-+ int *checkpt_block_list;
-+ int checkpt_max_blocks;
-+ u32 checkpt_sum;
-+ u32 checkpt_xor;
-+
-+ int checkpoint_blocks_required; /* Number of blocks needed to store
-+ * current checkpoint set */
-+
-+ /* Block Info */
-+ struct yaffs_block_info *block_info;
-+ u8 *chunk_bits; /* bitmap of chunks in use */
-+ u8 block_info_alt:1; /* allocated using alternative alloc */
-+ u8 chunk_bits_alt:1; /* allocated using alternative alloc */
-+ int chunk_bit_stride; /* Number of bytes of chunk_bits per block.
-+ * Must be consistent with chunks_per_block.
-+ */
-+
-+ int n_erased_blocks;
-+ int alloc_block; /* Current block being allocated off */
-+ u32 alloc_page;
-+ int alloc_block_finder; /* Used to search for next allocation block */
-+
-+ /* Object and Tnode memory management */
-+ void *allocator;
-+ int n_obj;
-+ int n_tnodes;
-+
-+ int n_hardlinks;
-+
-+ struct yaffs_obj_bucket obj_bucket[YAFFS_NOBJECT_BUCKETS];
-+ u32 bucket_finder;
-+
-+ int n_free_chunks;
-+
-+ /* Garbage collection control */
-+ u32 *gc_cleanup_list; /* objects to delete at the end of a GC. */
-+ u32 n_clean_ups;
-+
-+ unsigned has_pending_prioritised_gc; /* We think this device might
-+ have pending prioritised gcs */
-+ unsigned gc_disable;
-+ unsigned gc_block_finder;
-+ unsigned gc_dirtiest;
-+ unsigned gc_pages_in_use;
-+ unsigned gc_not_done;
-+ unsigned gc_block;
-+ unsigned gc_chunk;
-+ unsigned gc_skip;
-+ struct yaffs_summary_tags *gc_sum_tags;
-+
-+ /* Special directories */
-+ struct yaffs_obj *root_dir;
-+ struct yaffs_obj *lost_n_found;
-+
-+ int buffered_block; /* Which block is buffered here? */
-+ int doing_buffered_block_rewrite;
-+
-+ struct yaffs_cache *cache;
-+ int cache_last_use;
-+
-+ /* Stuff for background deletion and unlinked files. */
-+ struct yaffs_obj *unlinked_dir; /* Directory where unlinked and deleted
-+ files live. */
-+ struct yaffs_obj *del_dir; /* Directory where deleted objects are
-+ sent to disappear. */
-+ struct yaffs_obj *unlinked_deletion; /* Current file being
-+ background deleted. */
-+ int n_deleted_files; /* Count of files awaiting deletion; */
-+ int n_unlinked_files; /* Count of unlinked files. */
-+ int n_bg_deletions; /* Count of background deletions. */
-+
-+ /* Temporary buffer management */
-+ struct yaffs_buffer temp_buffer[YAFFS_N_TEMP_BUFFERS];
-+ int max_temp;
-+ int temp_in_use;
-+ int unmanaged_buffer_allocs;
-+ int unmanaged_buffer_deallocs;
-+
-+ /* yaffs2 runtime stuff */
-+ unsigned seq_number; /* Sequence number of currently
-+ allocating block */
-+ unsigned oldest_dirty_seq;
-+ unsigned oldest_dirty_block;
-+
-+ /* Block refreshing */
-+ int refresh_skip; /* A skip down counter.
-+ * Refresh happens when this gets to zero. */
-+
-+ /* Dirty directory handling */
-+ struct list_head dirty_dirs; /* List of dirty directories */
-+
-+ /* Summary */
-+ int chunks_per_summary;
-+ struct yaffs_summary_tags *sum_tags;
-+
-+ /* Statistics */
-+ u32 n_page_writes;
-+ u32 n_page_reads;
-+ u32 n_erasures;
-+ u32 n_bad_queries;
-+ u32 n_bad_markings;
-+ u32 n_erase_failures;
-+ u32 n_gc_copies;
-+ u32 all_gcs;
-+ u32 passive_gc_count;
-+ u32 oldest_dirty_gc_count;
-+ u32 n_gc_blocks;
-+ u32 bg_gcs;
-+ u32 n_retried_writes;
-+ u32 n_retired_blocks;
-+ u32 n_ecc_fixed;
-+ u32 n_ecc_unfixed;
-+ u32 n_tags_ecc_fixed;
-+ u32 n_tags_ecc_unfixed;
-+ u32 n_deletions;
-+ u32 n_unmarked_deletions;
-+ u32 refresh_count;
-+ u32 cache_hits;
-+ u32 tags_used;
-+ u32 summary_used;
-+
-+};
-+
-+/* The CheckpointDevice structure holds the device information that changes
-+ *at runtime and must be preserved over unmount/mount cycles.
-+ */
-+struct yaffs_checkpt_dev {
-+ int struct_type;
-+ int n_erased_blocks;
-+ int alloc_block; /* Current block being allocated off */
-+ u32 alloc_page;
-+ int n_free_chunks;
-+
-+ int n_deleted_files; /* Count of files awaiting deletion; */
-+ int n_unlinked_files; /* Count of unlinked files. */
-+ int n_bg_deletions; /* Count of background deletions. */
-+
-+ /* yaffs2 runtime stuff */
-+ unsigned seq_number; /* Sequence number of currently
-+ * allocating block */
-+
-+};
-+
-+struct yaffs_checkpt_validity {
-+ int struct_type;
-+ u32 magic;
-+ u32 version;
-+ u32 head;
-+};
-+
-+struct yaffs_shadow_fixer {
-+ int obj_id;
-+ int shadowed_id;
-+ struct yaffs_shadow_fixer *next;
-+};
-+
-+/* Structure for doing xattr modifications */
-+struct yaffs_xattr_mod {
-+ int set; /* If 0 then this is a deletion */
-+ const YCHAR *name;
-+ const void *data;
-+ int size;
-+ int flags;
-+ int result;
-+};
-+
-+/*----------------------- YAFFS Functions -----------------------*/
-+
-+int yaffs_guts_initialise(struct yaffs_dev *dev);
-+void yaffs_deinitialise(struct yaffs_dev *dev);
-+
-+int yaffs_get_n_free_chunks(struct yaffs_dev *dev);
-+
-+int yaffs_rename_obj(struct yaffs_obj *old_dir, const YCHAR * old_name,
-+ struct yaffs_obj *new_dir, const YCHAR * new_name);
-+
-+int yaffs_unlinker(struct yaffs_obj *dir, const YCHAR * name);
-+int yaffs_del_obj(struct yaffs_obj *obj);
-+struct yaffs_obj *yaffs_retype_obj(struct yaffs_obj *obj,
-+ enum yaffs_obj_type type);
-+
-+
-+int yaffs_get_obj_name(struct yaffs_obj *obj, YCHAR * name, int buffer_size);
-+loff_t yaffs_get_obj_length(struct yaffs_obj *obj);
-+int yaffs_get_obj_inode(struct yaffs_obj *obj);
-+unsigned yaffs_get_obj_type(struct yaffs_obj *obj);
-+int yaffs_get_obj_link_count(struct yaffs_obj *obj);
-+
-+/* File operations */
-+int yaffs_file_rd(struct yaffs_obj *obj, u8 * buffer, loff_t offset,
-+ int n_bytes);
-+int yaffs_wr_file(struct yaffs_obj *obj, const u8 * buffer, loff_t offset,
-+ int n_bytes, int write_trhrough);
-+int yaffs_resize_file(struct yaffs_obj *obj, loff_t new_size);
-+
-+struct yaffs_obj *yaffs_create_file(struct yaffs_obj *parent,
-+ const YCHAR *name, u32 mode, u32 uid,
-+ u32 gid);
-+
-+int yaffs_flush_file(struct yaffs_obj *obj, int update_time, int data_sync);
-+
-+/* Flushing and checkpointing */
-+void yaffs_flush_whole_cache(struct yaffs_dev *dev);
-+
-+int yaffs_checkpoint_save(struct yaffs_dev *dev);
-+int yaffs_checkpoint_restore(struct yaffs_dev *dev);
-+
-+/* Directory operations */
-+struct yaffs_obj *yaffs_create_dir(struct yaffs_obj *parent, const YCHAR *name,
-+ u32 mode, u32 uid, u32 gid);
-+struct yaffs_obj *yaffs_find_by_name(struct yaffs_obj *the_dir,
-+ const YCHAR *name);
-+struct yaffs_obj *yaffs_find_by_number(struct yaffs_dev *dev, u32 number);
-+
-+/* Link operations */
-+struct yaffs_obj *yaffs_link_obj(struct yaffs_obj *parent, const YCHAR *name,
-+ struct yaffs_obj *equiv_obj);
-+
-+struct yaffs_obj *yaffs_get_equivalent_obj(struct yaffs_obj *obj);
-+
-+/* Symlink operations */
-+struct yaffs_obj *yaffs_create_symlink(struct yaffs_obj *parent,
-+ const YCHAR *name, u32 mode, u32 uid,
-+ u32 gid, const YCHAR *alias);
-+YCHAR *yaffs_get_symlink_alias(struct yaffs_obj *obj);
-+
-+/* Special inodes (fifos, sockets and devices) */
-+struct yaffs_obj *yaffs_create_special(struct yaffs_obj *parent,
-+ const YCHAR *name, u32 mode, u32 uid,
-+ u32 gid, u32 rdev);
-+
-+int yaffs_set_xattrib(struct yaffs_obj *obj, const YCHAR *name,
-+ const void *value, int size, int flags);
-+int yaffs_get_xattrib(struct yaffs_obj *obj, const YCHAR *name, void *value,
-+ int size);
-+int yaffs_list_xattrib(struct yaffs_obj *obj, char *buffer, int size);
-+int yaffs_remove_xattrib(struct yaffs_obj *obj, const YCHAR *name);
-+
-+/* Special directories */
-+struct yaffs_obj *yaffs_root(struct yaffs_dev *dev);
-+struct yaffs_obj *yaffs_lost_n_found(struct yaffs_dev *dev);
-+
-+void yaffs_handle_defered_free(struct yaffs_obj *obj);
-+
-+void yaffs_update_dirty_dirs(struct yaffs_dev *dev);
-+
-+int yaffs_bg_gc(struct yaffs_dev *dev, unsigned urgency);
-+
-+/* Debug dump */
-+int yaffs_dump_obj(struct yaffs_obj *obj);
-+
-+void yaffs_guts_test(struct yaffs_dev *dev);
-+int yaffs_guts_ll_init(struct yaffs_dev *dev);
-+
-+
-+/* A few useful functions to be used within the core files*/
-+void yaffs_chunk_del(struct yaffs_dev *dev, int chunk_id, int mark_flash,
-+ int lyn);
-+int yaffs_check_ff(u8 *buffer, int n_bytes);
-+void yaffs_handle_chunk_error(struct yaffs_dev *dev,
-+ struct yaffs_block_info *bi);
-+
-+u8 *yaffs_get_temp_buffer(struct yaffs_dev *dev);
-+void yaffs_release_temp_buffer(struct yaffs_dev *dev, u8 *buffer);
-+
-+struct yaffs_obj *yaffs_find_or_create_by_number(struct yaffs_dev *dev,
-+ int number,
-+ enum yaffs_obj_type type);
-+int yaffs_put_chunk_in_file(struct yaffs_obj *in, int inode_chunk,
-+ int nand_chunk, int in_scan);
-+void yaffs_set_obj_name(struct yaffs_obj *obj, const YCHAR *name);
-+void yaffs_set_obj_name_from_oh(struct yaffs_obj *obj,
-+ const struct yaffs_obj_hdr *oh);
-+void yaffs_add_obj_to_dir(struct yaffs_obj *directory, struct yaffs_obj *obj);
-+YCHAR *yaffs_clone_str(const YCHAR *str);
-+void yaffs_link_fixup(struct yaffs_dev *dev, struct list_head *hard_list);
-+void yaffs_block_became_dirty(struct yaffs_dev *dev, int block_no);
-+int yaffs_update_oh(struct yaffs_obj *in, const YCHAR *name,
-+ int force, int is_shrink, int shadows,
-+ struct yaffs_xattr_mod *xop);
-+void yaffs_handle_shadowed_obj(struct yaffs_dev *dev, int obj_id,
-+ int backward_scanning);
-+int yaffs_check_alloc_available(struct yaffs_dev *dev, int n_chunks);
-+struct yaffs_tnode *yaffs_get_tnode(struct yaffs_dev *dev);
-+struct yaffs_tnode *yaffs_add_find_tnode_0(struct yaffs_dev *dev,
-+ struct yaffs_file_var *file_struct,
-+ u32 chunk_id,
-+ struct yaffs_tnode *passed_tn);
-+
-+int yaffs_do_file_wr(struct yaffs_obj *in, const u8 *buffer, loff_t offset,
-+ int n_bytes, int write_trhrough);
-+void yaffs_resize_file_down(struct yaffs_obj *obj, loff_t new_size);
-+void yaffs_skip_rest_of_block(struct yaffs_dev *dev);
-+
-+int yaffs_count_free_chunks(struct yaffs_dev *dev);
-+
-+struct yaffs_tnode *yaffs_find_tnode_0(struct yaffs_dev *dev,
-+ struct yaffs_file_var *file_struct,
-+ u32 chunk_id);
-+
-+u32 yaffs_get_group_base(struct yaffs_dev *dev, struct yaffs_tnode *tn,
-+ unsigned pos);
-+
-+int yaffs_is_non_empty_dir(struct yaffs_obj *obj);
-+
-+int yaffs_guts_format_dev(struct yaffs_dev *dev);
-+
-+void yaffs_addr_to_chunk(struct yaffs_dev *dev, loff_t addr,
-+ int *chunk_out, u32 *offset_out);
-+/*
-+ * Marshalling functions to get loff_t file sizes into aand out of
-+ * object headers.
-+ */
-+void yaffs_oh_size_load(struct yaffs_obj_hdr *oh, loff_t fsize);
-+loff_t yaffs_oh_to_size(struct yaffs_obj_hdr *oh);
-+loff_t yaffs_max_file_size(struct yaffs_dev *dev);
-+
-+/*
-+ * Debug function to count number of blocks in each state
-+ * NB Needs to be called with correct number of integers
-+ */
-+
-+void yaffs_count_blocks_by_state(struct yaffs_dev *dev, int bs[10]);
-+
-+int yaffs_find_chunk_in_file(struct yaffs_obj *in, int inode_chunk,
-+ struct yaffs_ext_tags *tags);
-+
-+#endif
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_linux.h linux-3.10.40/fs/yaffs2/yaffs_linux.h
---- linux-3.10.40.orig/fs/yaffs2/yaffs_linux.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_linux.h 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,48 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_LINUX_H__
-+#define __YAFFS_LINUX_H__
-+
-+#include "yportenv.h"
-+
-+struct yaffs_linux_context {
-+ struct list_head context_list; /* List of these we have mounted */
-+ struct yaffs_dev *dev;
-+ struct super_block *super;
-+ struct task_struct *bg_thread; /* Background thread for this device */
-+ int bg_running;
-+ struct mutex gross_lock; /* Gross locking mutex*/
-+ u8 *spare_buffer; /* For mtdif2 use. Don't know the buffer size
-+ * at compile time so we have to allocate it.
-+ */
-+ struct list_head search_contexts;
-+ struct task_struct *readdir_process;
-+ unsigned mount_id;
-+ int dirty;
-+};
-+
-+#define yaffs_dev_to_lc(dev) ((struct yaffs_linux_context *)((dev)->os_context))
-+#define yaffs_dev_to_mtd(dev) ((struct mtd_info *)((dev)->driver_context))
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-+#define WRITE_SIZE_STR "writesize"
-+#define WRITE_SIZE(mtd) ((mtd)->writesize)
-+#else
-+#define WRITE_SIZE_STR "oobblock"
-+#define WRITE_SIZE(mtd) ((mtd)->oobblock)
-+#endif
-+
-+#endif
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_mtdif.c linux-3.10.40/fs/yaffs2/yaffs_mtdif.c
---- linux-3.10.40.orig/fs/yaffs2/yaffs_mtdif.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_mtdif.c 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,309 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yportenv.h"
-+
-+#include "yaffs_mtdif.h"
-+
-+#include "linux/mtd/mtd.h"
-+#include "linux/types.h"
-+#include "linux/time.h"
-+#include "linux/major.h"
-+#include "linux/mtd/nand.h"
-+#include "linux/kernel.h"
-+#include "linux/version.h"
-+#include "linux/types.h"
-+
-+#include "yaffs_trace.h"
-+#include "yaffs_guts.h"
-+#include "yaffs_linux.h"
-+
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 2, 0))
-+#define MTD_OPS_AUTO_OOB MTD_OOB_AUTO
-+#endif
-+
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 4, 0))
-+#define mtd_erase(m, ei) (m)->erase(m, ei)
-+#define mtd_write_oob(m, addr, pops) (m)->write_oob(m, addr, pops)
-+#define mtd_read_oob(m, addr, pops) (m)->read_oob(m, addr, pops)
-+#define mtd_block_isbad(m, offs) (m)->block_isbad(m, offs)
-+#define mtd_block_markbad(m, offs) (m)->block_markbad(m, offs)
-+#endif
-+
-+
-+
-+int nandmtd_erase_block(struct yaffs_dev *dev, int block_no)
-+{
-+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
-+ u32 addr =
-+ ((loff_t) block_no) * dev->param.total_bytes_per_chunk *
-+ dev->param.chunks_per_block;
-+ struct erase_info ei;
-+ int retval = 0;
-+
-+ ei.mtd = mtd;
-+ ei.addr = addr;
-+ ei.len = dev->param.total_bytes_per_chunk * dev->param.chunks_per_block;
-+ ei.time = 1000;
-+ ei.retries = 2;
-+ ei.callback = NULL;
-+ ei.priv = (u_long) dev;
-+
-+ retval = mtd_erase(mtd, &ei);
-+
-+ if (retval == 0)
-+ return YAFFS_OK;
-+
-+ return YAFFS_FAIL;
-+}
-+
-+
-+static int yaffs_mtd_write(struct yaffs_dev *dev, int nand_chunk,
-+ const u8 *data, int data_len,
-+ const u8 *oob, int oob_len)
-+{
-+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
-+ loff_t addr;
-+ struct mtd_oob_ops ops;
-+ int retval;
-+
-+ yaffs_trace(YAFFS_TRACE_MTD,
-+ "yaffs_mtd_write(%p, %d, %p, %d, %p, %d)\n",
-+ dev, nand_chunk, data, data_len, oob, oob_len);
-+
-+ if (!data || !data_len) {
-+ data = NULL;
-+ data_len = 0;
-+ }
-+
-+ if (!oob || !oob_len) {
-+ oob = NULL;
-+ oob_len = 0;
-+ }
-+
-+ addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk;
-+ memset(&ops, 0, sizeof(ops));
-+ ops.mode = MTD_OPS_AUTO_OOB;
-+ ops.len = (data) ? data_len : 0;
-+ ops.ooblen = oob_len;
-+ ops.datbuf = (u8 *)data;
-+ ops.oobbuf = (u8 *)oob;
-+
-+ retval = mtd_write_oob(mtd, addr, &ops);
-+ if (retval) {
-+ yaffs_trace(YAFFS_TRACE_MTD,
-+ "write_oob failed, chunk %d, mtd error %d",
-+ nand_chunk, retval);
-+ }
-+ return retval ? YAFFS_FAIL : YAFFS_OK;
-+}
-+
-+static int yaffs_mtd_read(struct yaffs_dev *dev, int nand_chunk,
-+ u8 *data, int data_len,
-+ u8 *oob, int oob_len,
-+ enum yaffs_ecc_result *ecc_result)
-+{
-+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
-+ loff_t addr;
-+ struct mtd_oob_ops ops;
-+ int retval;
-+
-+ addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk;
-+ memset(&ops, 0, sizeof(ops));
-+ ops.mode = MTD_OPS_AUTO_OOB;
-+ ops.len = (data) ? data_len : 0;
-+ ops.ooblen = oob_len;
-+ ops.datbuf = data;
-+ ops.oobbuf = oob;
-+
-+#if (MTD_VERSION_CODE < MTD_VERSION(2, 6, 20))
-+ /* In MTD 2.6.18 to 2.6.19 nand_base.c:nand_do_read_oob() has a bug;
-+ * help it out with ops.len = ops.ooblen when ops.datbuf == NULL.
-+ */
-+ ops.len = (ops.datbuf) ? ops.len : ops.ooblen;
-+#endif
-+ /* Read page and oob using MTD.
-+ * Check status and determine ECC result.
-+ */
-+ retval = mtd_read_oob(mtd, addr, &ops);
-+ if (retval)
-+ yaffs_trace(YAFFS_TRACE_MTD,
-+ "read_oob failed, chunk %d, mtd error %d",
-+ nand_chunk, retval);
-+
-+ switch (retval) {
-+ case 0:
-+ /* no error */
-+ if(ecc_result)
-+ *ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
-+ break;
-+
-+ case -EUCLEAN:
-+ /* MTD's ECC fixed the data */
-+ if(ecc_result)
-+ *ecc_result = YAFFS_ECC_RESULT_FIXED;
-+ dev->n_ecc_fixed++;
-+ break;
-+
-+ case -EBADMSG:
-+ default:
-+ /* MTD's ECC could not fix the data */
-+ dev->n_ecc_unfixed++;
-+ if(ecc_result)
-+ *ecc_result = YAFFS_ECC_RESULT_UNFIXED;
-+ return YAFFS_FAIL;
-+ }
-+
-+ return YAFFS_OK;
-+}
-+
-+static int yaffs_mtd_erase(struct yaffs_dev *dev, int block_no)
-+{
-+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
-+
-+ loff_t addr;
-+ struct erase_info ei;
-+ int retval = 0;
-+ u32 block_size;
-+
-+ block_size = dev->param.total_bytes_per_chunk *
-+ dev->param.chunks_per_block;
-+ addr = ((loff_t) block_no) * block_size;
-+
-+ ei.mtd = mtd;
-+ ei.addr = addr;
-+ ei.len = block_size;
-+ ei.time = 1000;
-+ ei.retries = 2;
-+ ei.callback = NULL;
-+ ei.priv = (u_long) dev;
-+
-+ retval = mtd_erase(mtd, &ei);
-+
-+ if (retval == 0)
-+ return YAFFS_OK;
-+
-+ return YAFFS_FAIL;
-+}
-+
-+static int yaffs_mtd_mark_bad(struct yaffs_dev *dev, int block_no)
-+{
-+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
-+ int blocksize = dev->param.chunks_per_block * dev->param.total_bytes_per_chunk;
-+ int retval;
-+
-+ yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, "marking block %d bad", block_no);
-+
-+ retval = mtd_block_markbad(mtd, (loff_t) blocksize * block_no);
-+ return (retval) ? YAFFS_FAIL : YAFFS_OK;
-+}
-+
-+static int yaffs_mtd_check_bad(struct yaffs_dev *dev, int block_no)
-+{
-+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
-+ int blocksize = dev->param.chunks_per_block * dev->param.total_bytes_per_chunk;
-+ int retval;
-+
-+ yaffs_trace(YAFFS_TRACE_MTD, "checking block %d bad", block_no);
-+
-+ retval = mtd_block_isbad(mtd, (loff_t) blocksize * block_no);
-+ return (retval) ? YAFFS_FAIL : YAFFS_OK;
-+}
-+
-+static int yaffs_mtd_initialise(struct yaffs_dev *dev)
-+{
-+ return YAFFS_OK;
-+}
-+
-+static int yaffs_mtd_deinitialise(struct yaffs_dev *dev)
-+{
-+ return YAFFS_OK;
-+}
-+
-+
-+void yaffs_mtd_drv_install(struct yaffs_dev *dev)
-+{
-+ struct yaffs_driver *drv = &dev->drv;
-+
-+ drv->drv_write_chunk_fn = yaffs_mtd_write;
-+ drv->drv_read_chunk_fn = yaffs_mtd_read;
-+ drv->drv_erase_fn = yaffs_mtd_erase;
-+ drv->drv_mark_bad_fn = yaffs_mtd_mark_bad;
-+ drv->drv_check_bad_fn = yaffs_mtd_check_bad;
-+ drv->drv_initialise_fn = yaffs_mtd_initialise;
-+ drv->drv_deinitialise_fn = yaffs_mtd_deinitialise;
-+}
-+
-+
-+struct mtd_info * yaffs_get_mtd_device(dev_t sdev)
-+{
-+ struct mtd_info *mtd;
-+
-+ mtd = yaffs_get_mtd_device(sdev);
-+
-+ /* Check it's an mtd device..... */
-+ if (MAJOR(sdev) != MTD_BLOCK_MAJOR)
-+ return NULL; /* This isn't an mtd device */
-+
-+ /* Check it's NAND */
-+ if (mtd->type != MTD_NANDFLASH) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs: MTD device is not NAND it's type %d",
-+ mtd->type);
-+ return NULL;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_OS, " %s %d", WRITE_SIZE_STR, WRITE_SIZE(mtd));
-+ yaffs_trace(YAFFS_TRACE_OS, " oobsize %d", mtd->oobsize);
-+ yaffs_trace(YAFFS_TRACE_OS, " erasesize %d", mtd->erasesize);
-+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
-+ yaffs_trace(YAFFS_TRACE_OS, " size %u", mtd->size);
-+#else
-+ yaffs_trace(YAFFS_TRACE_OS, " size %lld", mtd->size);
-+#endif
-+
-+ return mtd;
-+}
-+
-+int yaffs_verify_mtd(struct mtd_info *mtd, int yaffs_version, int inband_tags)
-+{
-+ if (yaffs_version == 2) {
-+ if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
-+ mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) &&
-+ !inband_tags) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "MTD device does not have the right page sizes"
-+ );
-+ return -1;
-+ }
-+ } else {
-+ if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK ||
-+ mtd->oobsize != YAFFS_BYTES_PER_SPARE) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "MTD device does not support have the right page sizes"
-+ );
-+ return -1;
-+ }
-+ }
-+
-+ return 0;
-+}
-+
-+
-+void yaffs_put_mtd_device(struct mtd_info *mtd)
-+{
-+ if(mtd)
-+ put_mtd_device(mtd);
-+}
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_mtdif.h linux-3.10.40/fs/yaffs2/yaffs_mtdif.h
---- linux-3.10.40.orig/fs/yaffs2/yaffs_mtdif.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_mtdif.h 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,25 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_MTDIF_H__
-+#define __YAFFS_MTDIF_H__
-+
-+#include "yaffs_guts.h"
-+
-+void yaffs_mtd_drv_install(struct yaffs_dev *dev);
-+struct mtd_info * yaffs_get_mtd_device(dev_t sdev);
-+void yaffs_put_mtd_device(struct mtd_info *mtd);
-+int yaffs_verify_mtd(struct mtd_info *mtd, int yaffs_version, int inband_tags);
-+#endif
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_nameval.c linux-3.10.40/fs/yaffs2/yaffs_nameval.c
---- linux-3.10.40.orig/fs/yaffs2/yaffs_nameval.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_nameval.c 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,208 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+/*
-+ * This simple implementation of a name-value store assumes a small number of
-+* values and fits into a small finite buffer.
-+ *
-+ * Each attribute is stored as a record:
-+ * sizeof(int) bytes record size.
-+ * strnlen+1 bytes name null terminated.
-+ * nbytes value.
-+ * ----------
-+ * total size stored in record size
-+ *
-+ * This code has not been tested with unicode yet.
-+ */
-+
-+#include "yaffs_nameval.h"
-+
-+#include "yportenv.h"
-+
-+static int nval_find(const char *xb, int xb_size, const YCHAR *name,
-+ int *exist_size)
-+{
-+ int pos = 0;
-+ int size;
-+
-+ memcpy(&size, xb, sizeof(int));
-+ while (size > 0 && (size < xb_size) && (pos + size < xb_size)) {
-+ if (!strncmp((YCHAR *) (xb + pos + sizeof(int)),
-+ name, size)) {
-+ if (exist_size)
-+ *exist_size = size;
-+ return pos;
-+ }
-+ pos += size;
-+ if (pos < xb_size - sizeof(int))
-+ memcpy(&size, xb + pos, sizeof(int));
-+ else
-+ size = 0;
-+ }
-+ if (exist_size)
-+ *exist_size = 0;
-+ return -ENODATA;
-+}
-+
-+static int nval_used(const char *xb, int xb_size)
-+{
-+ int pos = 0;
-+ int size;
-+
-+ memcpy(&size, xb + pos, sizeof(int));
-+ while (size > 0 && (size < xb_size) && (pos + size < xb_size)) {
-+ pos += size;
-+ if (pos < xb_size - sizeof(int))
-+ memcpy(&size, xb + pos, sizeof(int));
-+ else
-+ size = 0;
-+ }
-+ return pos;
-+}
-+
-+int nval_del(char *xb, int xb_size, const YCHAR *name)
-+{
-+ int pos = nval_find(xb, xb_size, name, NULL);
-+ int size;
-+
-+ if (pos < 0 || pos >= xb_size)
-+ return -ENODATA;
-+
-+ /* Find size, shift rest over this record,
-+ * then zero out the rest of buffer */
-+ memcpy(&size, xb + pos, sizeof(int));
-+ memcpy(xb + pos, xb + pos + size, xb_size - (pos + size));
-+ memset(xb + (xb_size - size), 0, size);
-+ return 0;
-+}
-+
-+int nval_set(char *xb, int xb_size, const YCHAR *name, const char *buf,
-+ int bsize, int flags)
-+{
-+ int pos;
-+ int namelen = strnlen(name, xb_size);
-+ int reclen;
-+ int size_exist = 0;
-+ int space;
-+ int start;
-+
-+ pos = nval_find(xb, xb_size, name, &size_exist);
-+
-+ if (flags & XATTR_CREATE && pos >= 0)
-+ return -EEXIST;
-+ if (flags & XATTR_REPLACE && pos < 0)
-+ return -ENODATA;
-+
-+ start = nval_used(xb, xb_size);
-+ space = xb_size - start + size_exist;
-+
-+ reclen = (sizeof(int) + namelen + 1 + bsize);
-+
-+ if (reclen > space)
-+ return -ENOSPC;
-+
-+ if (pos >= 0) {
-+ nval_del(xb, xb_size, name);
-+ start = nval_used(xb, xb_size);
-+ }
-+
-+ pos = start;
-+
-+ memcpy(xb + pos, &reclen, sizeof(int));
-+ pos += sizeof(int);
-+ strncpy((YCHAR *) (xb + pos), name, reclen);
-+ pos += (namelen + 1);
-+ memcpy(xb + pos, buf, bsize);
-+ return 0;
-+}
-+
-+int nval_get(const char *xb, int xb_size, const YCHAR * name, char *buf,
-+ int bsize)
-+{
-+ int pos = nval_find(xb, xb_size, name, NULL);
-+ int size;
-+
-+ if (pos >= 0 && pos < xb_size) {
-+
-+ memcpy(&size, xb + pos, sizeof(int));
-+ pos += sizeof(int); /* advance past record length */
-+ size -= sizeof(int);
-+
-+ /* Advance over name string */
-+ while (xb[pos] && size > 0 && pos < xb_size) {
-+ pos++;
-+ size--;
-+ }
-+ /*Advance over NUL */
-+ pos++;
-+ size--;
-+
-+ /* If bsize is zero then this is a size query.
-+ * Return the size, but don't copy.
-+ */
-+ if (!bsize)
-+ return size;
-+
-+ if (size <= bsize) {
-+ memcpy(buf, xb + pos, size);
-+ return size;
-+ }
-+ }
-+ if (pos >= 0)
-+ return -ERANGE;
-+
-+ return -ENODATA;
-+}
-+
-+int nval_list(const char *xb, int xb_size, char *buf, int bsize)
-+{
-+ int pos = 0;
-+ int size;
-+ int name_len;
-+ int ncopied = 0;
-+ int filled = 0;
-+
-+ memcpy(&size, xb + pos, sizeof(int));
-+ while (size > sizeof(int) &&
-+ size <= xb_size &&
-+ (pos + size) < xb_size &&
-+ !filled) {
-+ pos += sizeof(int);
-+ size -= sizeof(int);
-+ name_len = strnlen((YCHAR *) (xb + pos), size);
-+ if (ncopied + name_len + 1 < bsize) {
-+ memcpy(buf, xb + pos, name_len * sizeof(YCHAR));
-+ buf += name_len;
-+ *buf = '\0';
-+ buf++;
-+ if (sizeof(YCHAR) > 1) {
-+ *buf = '\0';
-+ buf++;
-+ }
-+ ncopied += (name_len + 1);
-+ } else {
-+ filled = 1;
-+ }
-+ pos += size;
-+ if (pos < xb_size - sizeof(int))
-+ memcpy(&size, xb + pos, sizeof(int));
-+ else
-+ size = 0;
-+ }
-+ return ncopied;
-+}
-+
-+int nval_hasvalues(const char *xb, int xb_size)
-+{
-+ return nval_used(xb, xb_size) > 0;
-+}
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_nameval.h linux-3.10.40/fs/yaffs2/yaffs_nameval.h
---- linux-3.10.40.orig/fs/yaffs2/yaffs_nameval.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_nameval.h 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,28 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __NAMEVAL_H__
-+#define __NAMEVAL_H__
-+
-+#include "yportenv.h"
-+
-+int nval_del(char *xb, int xb_size, const YCHAR * name);
-+int nval_set(char *xb, int xb_size, const YCHAR * name, const char *buf,
-+ int bsize, int flags);
-+int nval_get(const char *xb, int xb_size, const YCHAR * name, char *buf,
-+ int bsize);
-+int nval_list(const char *xb, int xb_size, char *buf, int bsize);
-+int nval_hasvalues(const char *xb, int xb_size);
-+#endif
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_nand.c linux-3.10.40/fs/yaffs2/yaffs_nand.c
---- linux-3.10.40.orig/fs/yaffs2/yaffs_nand.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_nand.c 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,122 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_nand.h"
-+#include "yaffs_tagscompat.h"
-+
-+#include "yaffs_getblockinfo.h"
-+#include "yaffs_summary.h"
-+
-+static int apply_chunk_offset(struct yaffs_dev *dev, int chunk)
-+{
-+ return chunk - dev->chunk_offset;
-+}
-+
-+int yaffs_rd_chunk_tags_nand(struct yaffs_dev *dev, int nand_chunk,
-+ u8 *buffer, struct yaffs_ext_tags *tags)
-+{
-+ int result;
-+ struct yaffs_ext_tags local_tags;
-+ int flash_chunk = apply_chunk_offset(dev, nand_chunk);
-+
-+ dev->n_page_reads++;
-+
-+ /* If there are no tags provided use local tags. */
-+ if (!tags)
-+ tags = &local_tags;
-+
-+ result = dev->tagger.read_chunk_tags_fn(dev, flash_chunk, buffer, tags);
-+ if (tags && tags->ecc_result > YAFFS_ECC_RESULT_NO_ERROR) {
-+
-+ struct yaffs_block_info *bi;
-+ bi = yaffs_get_block_info(dev,
-+ nand_chunk /
-+ dev->param.chunks_per_block);
-+ yaffs_handle_chunk_error(dev, bi);
-+ }
-+ return result;
-+}
-+
-+int yaffs_wr_chunk_tags_nand(struct yaffs_dev *dev,
-+ int nand_chunk,
-+ const u8 *buffer, struct yaffs_ext_tags *tags)
-+{
-+ int result;
-+ int flash_chunk = apply_chunk_offset(dev, nand_chunk);
-+
-+ dev->n_page_writes++;
-+
-+ if (!tags) {
-+ yaffs_trace(YAFFS_TRACE_ERROR, "Writing with no tags");
-+ BUG();
-+ return YAFFS_FAIL;
-+ }
-+
-+ tags->seq_number = dev->seq_number;
-+ tags->chunk_used = 1;
-+ yaffs_trace(YAFFS_TRACE_WRITE,
-+ "Writing chunk %d tags %d %d",
-+ nand_chunk, tags->obj_id, tags->chunk_id);
-+
-+ result = dev->tagger.write_chunk_tags_fn(dev, flash_chunk,
-+ buffer, tags);
-+
-+ yaffs_summary_add(dev, tags, nand_chunk);
-+
-+ return result;
-+}
-+
-+int yaffs_mark_bad(struct yaffs_dev *dev, int block_no)
-+{
-+ block_no -= dev->block_offset;
-+ dev->n_bad_markings++;
-+
-+ if (dev->param.disable_bad_block_marking)
-+ return YAFFS_OK;
-+
-+ return dev->tagger.mark_bad_fn(dev, block_no);
-+}
-+
-+
-+int yaffs_query_init_block_state(struct yaffs_dev *dev,
-+ int block_no,
-+ enum yaffs_block_state *state,
-+ u32 *seq_number)
-+{
-+ block_no -= dev->block_offset;
-+ return dev->tagger.query_block_fn(dev, block_no, state, seq_number);
-+}
-+
-+int yaffs_erase_block(struct yaffs_dev *dev, int block_no)
-+{
-+ int result;
-+
-+ block_no -= dev->block_offset;
-+ dev->n_erasures++;
-+ result = dev->drv.drv_erase_fn(dev, block_no);
-+ return result;
-+}
-+
-+int yaffs_init_nand(struct yaffs_dev *dev)
-+{
-+ if (dev->drv.drv_initialise_fn)
-+ return dev->drv.drv_initialise_fn(dev);
-+ return YAFFS_OK;
-+}
-+
-+int yaffs_deinit_nand(struct yaffs_dev *dev)
-+{
-+ if (dev->drv.drv_deinitialise_fn)
-+ return dev->drv.drv_deinitialise_fn(dev);
-+ return YAFFS_OK;
-+}
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_nand.h linux-3.10.40/fs/yaffs2/yaffs_nand.h
---- linux-3.10.40.orig/fs/yaffs2/yaffs_nand.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_nand.h 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,39 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_NAND_H__
-+#define __YAFFS_NAND_H__
-+#include "yaffs_guts.h"
-+
-+int yaffs_rd_chunk_tags_nand(struct yaffs_dev *dev, int nand_chunk,
-+ u8 *buffer, struct yaffs_ext_tags *tags);
-+
-+int yaffs_wr_chunk_tags_nand(struct yaffs_dev *dev,
-+ int nand_chunk,
-+ const u8 *buffer, struct yaffs_ext_tags *tags);
-+
-+int yaffs_mark_bad(struct yaffs_dev *dev, int block_no);
-+
-+int yaffs_query_init_block_state(struct yaffs_dev *dev,
-+ int block_no,
-+ enum yaffs_block_state *state,
-+ unsigned *seq_number);
-+
-+int yaffs_erase_block(struct yaffs_dev *dev, int flash_block);
-+
-+int yaffs_init_nand(struct yaffs_dev *dev);
-+int yaffs_deinit_nand(struct yaffs_dev *dev);
-+
-+#endif
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_packedtags1.c linux-3.10.40/fs/yaffs2/yaffs_packedtags1.c
---- linux-3.10.40.orig/fs/yaffs2/yaffs_packedtags1.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_packedtags1.c 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,56 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_packedtags1.h"
-+#include "yportenv.h"
-+
-+static const u8 all_ff[20] = {
-+ 0xff, 0xff, 0xff, 0xff,
-+ 0xff, 0xff, 0xff, 0xff,
-+ 0xff, 0xff, 0xff, 0xff,
-+ 0xff, 0xff, 0xff, 0xff,
-+ 0xff, 0xff, 0xff, 0xff
-+};
-+
-+void yaffs_pack_tags1(struct yaffs_packed_tags1 *pt,
-+ const struct yaffs_ext_tags *t)
-+{
-+ pt->chunk_id = t->chunk_id;
-+ pt->serial_number = t->serial_number;
-+ pt->n_bytes = t->n_bytes;
-+ pt->obj_id = t->obj_id;
-+ pt->ecc = 0;
-+ pt->deleted = (t->is_deleted) ? 0 : 1;
-+ pt->unused_stuff = 0;
-+ pt->should_be_ff = 0xffffffff;
-+}
-+
-+void yaffs_unpack_tags1(struct yaffs_ext_tags *t,
-+ const struct yaffs_packed_tags1 *pt)
-+{
-+
-+ if (memcmp(all_ff, pt, sizeof(struct yaffs_packed_tags1))) {
-+ t->block_bad = 0;
-+ if (pt->should_be_ff != 0xffffffff)
-+ t->block_bad = 1;
-+ t->chunk_used = 1;
-+ t->obj_id = pt->obj_id;
-+ t->chunk_id = pt->chunk_id;
-+ t->n_bytes = pt->n_bytes;
-+ t->ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
-+ t->is_deleted = (pt->deleted) ? 0 : 1;
-+ t->serial_number = pt->serial_number;
-+ } else {
-+ memset(t, 0, sizeof(struct yaffs_ext_tags));
-+ }
-+}
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_packedtags1.h linux-3.10.40/fs/yaffs2/yaffs_packedtags1.h
---- linux-3.10.40.orig/fs/yaffs2/yaffs_packedtags1.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_packedtags1.h 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,39 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+/* This is used to pack YAFFS1 tags, not YAFFS2 tags. */
-+
-+#ifndef __YAFFS_PACKEDTAGS1_H__
-+#define __YAFFS_PACKEDTAGS1_H__
-+
-+#include "yaffs_guts.h"
-+
-+struct yaffs_packed_tags1 {
-+ u32 chunk_id:20;
-+ u32 serial_number:2;
-+ u32 n_bytes:10;
-+ u32 obj_id:18;
-+ u32 ecc:12;
-+ u32 deleted:1;
-+ u32 unused_stuff:1;
-+ unsigned should_be_ff;
-+
-+};
-+
-+void yaffs_pack_tags1(struct yaffs_packed_tags1 *pt,
-+ const struct yaffs_ext_tags *t);
-+void yaffs_unpack_tags1(struct yaffs_ext_tags *t,
-+ const struct yaffs_packed_tags1 *pt);
-+#endif
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_packedtags2.c linux-3.10.40/fs/yaffs2/yaffs_packedtags2.c
---- linux-3.10.40.orig/fs/yaffs2/yaffs_packedtags2.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_packedtags2.c 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,197 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_packedtags2.h"
-+#include "yportenv.h"
-+#include "yaffs_trace.h"
-+
-+/* This code packs a set of extended tags into a binary structure for
-+ * NAND storage
-+ */
-+
-+/* Some of the information is "extra" struff which can be packed in to
-+ * speed scanning
-+ * This is defined by having the EXTRA_HEADER_INFO_FLAG set.
-+ */
-+
-+/* Extra flags applied to chunk_id */
-+
-+#define EXTRA_HEADER_INFO_FLAG 0x80000000
-+#define EXTRA_SHRINK_FLAG 0x40000000
-+#define EXTRA_SHADOWS_FLAG 0x20000000
-+#define EXTRA_SPARE_FLAGS 0x10000000
-+
-+#define ALL_EXTRA_FLAGS 0xf0000000
-+
-+/* Also, the top 4 bits of the object Id are set to the object type. */
-+#define EXTRA_OBJECT_TYPE_SHIFT (28)
-+#define EXTRA_OBJECT_TYPE_MASK ((0x0f) << EXTRA_OBJECT_TYPE_SHIFT)
-+
-+static void yaffs_dump_packed_tags2_tags_only(
-+ const struct yaffs_packed_tags2_tags_only *ptt)
-+{
-+ yaffs_trace(YAFFS_TRACE_MTD,
-+ "packed tags obj %d chunk %d byte %d seq %d",
-+ ptt->obj_id, ptt->chunk_id, ptt->n_bytes, ptt->seq_number);
-+}
-+
-+static void yaffs_dump_packed_tags2(const struct yaffs_packed_tags2 *pt)
-+{
-+ yaffs_dump_packed_tags2_tags_only(&pt->t);
-+}
-+
-+static void yaffs_dump_tags2(const struct yaffs_ext_tags *t)
-+{
-+ yaffs_trace(YAFFS_TRACE_MTD,
-+ "ext.tags eccres %d blkbad %d chused %d obj %d chunk%d byte %d del %d ser %d seq %d",
-+ t->ecc_result, t->block_bad, t->chunk_used, t->obj_id,
-+ t->chunk_id, t->n_bytes, t->is_deleted, t->serial_number,
-+ t->seq_number);
-+
-+}
-+
-+static int yaffs_check_tags_extra_packable(const struct yaffs_ext_tags *t)
-+{
-+ if (t->chunk_id != 0 || !t->extra_available)
-+ return 0;
-+
-+ /* Check if the file size is too long to store */
-+ if (t->extra_obj_type == YAFFS_OBJECT_TYPE_FILE &&
-+ (t->extra_file_size >> 31) != 0)
-+ return 0;
-+ return 1;
-+}
-+
-+void yaffs_pack_tags2_tags_only(struct yaffs_packed_tags2_tags_only *ptt,
-+ const struct yaffs_ext_tags *t)
-+{
-+ ptt->chunk_id = t->chunk_id;
-+ ptt->seq_number = t->seq_number;
-+ ptt->n_bytes = t->n_bytes;
-+ ptt->obj_id = t->obj_id;
-+
-+ /* Only store extra tags for object headers.
-+ * If it is a file then only store if the file size is short\
-+ * enough to fit.
-+ */
-+ if (yaffs_check_tags_extra_packable(t)) {
-+ /* Store the extra header info instead */
-+ /* We save the parent object in the chunk_id */
-+ ptt->chunk_id = EXTRA_HEADER_INFO_FLAG | t->extra_parent_id;
-+ if (t->extra_is_shrink)
-+ ptt->chunk_id |= EXTRA_SHRINK_FLAG;
-+ if (t->extra_shadows)
-+ ptt->chunk_id |= EXTRA_SHADOWS_FLAG;
-+
-+ ptt->obj_id &= ~EXTRA_OBJECT_TYPE_MASK;
-+ ptt->obj_id |= (t->extra_obj_type << EXTRA_OBJECT_TYPE_SHIFT);
-+
-+ if (t->extra_obj_type == YAFFS_OBJECT_TYPE_HARDLINK)
-+ ptt->n_bytes = t->extra_equiv_id;
-+ else if (t->extra_obj_type == YAFFS_OBJECT_TYPE_FILE)
-+ ptt->n_bytes = (unsigned) t->extra_file_size;
-+ else
-+ ptt->n_bytes = 0;
-+ }
-+
-+ yaffs_dump_packed_tags2_tags_only(ptt);
-+ yaffs_dump_tags2(t);
-+}
-+
-+void yaffs_pack_tags2(struct yaffs_packed_tags2 *pt,
-+ const struct yaffs_ext_tags *t, int tags_ecc)
-+{
-+ yaffs_pack_tags2_tags_only(&pt->t, t);
-+
-+ if (tags_ecc)
-+ yaffs_ecc_calc_other((unsigned char *)&pt->t,
-+ sizeof(struct yaffs_packed_tags2_tags_only),
-+ &pt->ecc);
-+}
-+
-+void yaffs_unpack_tags2_tags_only(struct yaffs_ext_tags *t,
-+ struct yaffs_packed_tags2_tags_only *ptt)
-+{
-+ memset(t, 0, sizeof(struct yaffs_ext_tags));
-+
-+ if (ptt->seq_number == 0xffffffff)
-+ return;
-+
-+ t->block_bad = 0;
-+ t->chunk_used = 1;
-+ t->obj_id = ptt->obj_id;
-+ t->chunk_id = ptt->chunk_id;
-+ t->n_bytes = ptt->n_bytes;
-+ t->is_deleted = 0;
-+ t->serial_number = 0;
-+ t->seq_number = ptt->seq_number;
-+
-+ /* Do extra header info stuff */
-+ if (ptt->chunk_id & EXTRA_HEADER_INFO_FLAG) {
-+ t->chunk_id = 0;
-+ t->n_bytes = 0;
-+
-+ t->extra_available = 1;
-+ t->extra_parent_id = ptt->chunk_id & (~(ALL_EXTRA_FLAGS));
-+ t->extra_is_shrink = ptt->chunk_id & EXTRA_SHRINK_FLAG ? 1 : 0;
-+ t->extra_shadows = ptt->chunk_id & EXTRA_SHADOWS_FLAG ? 1 : 0;
-+ t->extra_obj_type = ptt->obj_id >> EXTRA_OBJECT_TYPE_SHIFT;
-+ t->obj_id &= ~EXTRA_OBJECT_TYPE_MASK;
-+
-+ if (t->extra_obj_type == YAFFS_OBJECT_TYPE_HARDLINK)
-+ t->extra_equiv_id = ptt->n_bytes;
-+ else
-+ t->extra_file_size = ptt->n_bytes;
-+ }
-+ yaffs_dump_packed_tags2_tags_only(ptt);
-+ yaffs_dump_tags2(t);
-+}
-+
-+void yaffs_unpack_tags2(struct yaffs_ext_tags *t, struct yaffs_packed_tags2 *pt,
-+ int tags_ecc)
-+{
-+ enum yaffs_ecc_result ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
-+
-+ if (pt->t.seq_number != 0xffffffff && tags_ecc) {
-+ /* Chunk is in use and we need to do ECC */
-+
-+ struct yaffs_ecc_other ecc;
-+ int result;
-+ yaffs_ecc_calc_other((unsigned char *)&pt->t,
-+ sizeof(struct yaffs_packed_tags2_tags_only),
-+ &ecc);
-+ result =
-+ yaffs_ecc_correct_other((unsigned char *)&pt->t,
-+ sizeof(struct yaffs_packed_tags2_tags_only),
-+ &pt->ecc, &ecc);
-+ switch (result) {
-+ case 0:
-+ ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
-+ break;
-+ case 1:
-+ ecc_result = YAFFS_ECC_RESULT_FIXED;
-+ break;
-+ case -1:
-+ ecc_result = YAFFS_ECC_RESULT_UNFIXED;
-+ break;
-+ default:
-+ ecc_result = YAFFS_ECC_RESULT_UNKNOWN;
-+ }
-+ }
-+ yaffs_unpack_tags2_tags_only(t, &pt->t);
-+
-+ t->ecc_result = ecc_result;
-+
-+ yaffs_dump_packed_tags2(pt);
-+ yaffs_dump_tags2(t);
-+}
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_packedtags2.h linux-3.10.40/fs/yaffs2/yaffs_packedtags2.h
---- linux-3.10.40.orig/fs/yaffs2/yaffs_packedtags2.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_packedtags2.h 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,47 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+/* This is used to pack YAFFS2 tags, not YAFFS1tags. */
-+
-+#ifndef __YAFFS_PACKEDTAGS2_H__
-+#define __YAFFS_PACKEDTAGS2_H__
-+
-+#include "yaffs_guts.h"
-+#include "yaffs_ecc.h"
-+
-+struct yaffs_packed_tags2_tags_only {
-+ unsigned seq_number;
-+ unsigned obj_id;
-+ unsigned chunk_id;
-+ unsigned n_bytes;
-+};
-+
-+struct yaffs_packed_tags2 {
-+ struct yaffs_packed_tags2_tags_only t;
-+ struct yaffs_ecc_other ecc;
-+};
-+
-+/* Full packed tags with ECC, used for oob tags */
-+void yaffs_pack_tags2(struct yaffs_packed_tags2 *pt,
-+ const struct yaffs_ext_tags *t, int tags_ecc);
-+void yaffs_unpack_tags2(struct yaffs_ext_tags *t, struct yaffs_packed_tags2 *pt,
-+ int tags_ecc);
-+
-+/* Only the tags part (no ECC for use with inband tags */
-+void yaffs_pack_tags2_tags_only(struct yaffs_packed_tags2_tags_only *pt,
-+ const struct yaffs_ext_tags *t);
-+void yaffs_unpack_tags2_tags_only(struct yaffs_ext_tags *t,
-+ struct yaffs_packed_tags2_tags_only *pt);
-+#endif
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_summary.c linux-3.10.40/fs/yaffs2/yaffs_summary.c
---- linux-3.10.40.orig/fs/yaffs2/yaffs_summary.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_summary.c 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,312 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+/* Summaries write the useful part of the tags for the chunks in a block into an
-+ * an array which is written to the last n chunks of the block.
-+ * Reading the summaries gives all the tags for the block in one read. Much
-+ * faster.
-+ *
-+ * Chunks holding summaries are marked with tags making it look like
-+ * they are part of a fake file.
-+ *
-+ * The summary could also be used during gc.
-+ *
-+ */
-+
-+#include "yaffs_summary.h"
-+#include "yaffs_packedtags2.h"
-+#include "yaffs_nand.h"
-+#include "yaffs_getblockinfo.h"
-+#include "yaffs_bitmap.h"
-+
-+/*
-+ * The summary is built up in an array of summary tags.
-+ * This gets written to the last one or two (maybe more) chunks in a block.
-+ * A summary header is written as the first part of each chunk of summary data.
-+ * The summary header must match or the summary is rejected.
-+ */
-+
-+/* Summary tags don't need the sequence number because that is redundant. */
-+struct yaffs_summary_tags {
-+ unsigned obj_id;
-+ unsigned chunk_id;
-+ unsigned n_bytes;
-+};
-+
-+/* Summary header */
-+struct yaffs_summary_header {
-+ unsigned version; /* Must match current version */
-+ unsigned block; /* Must be this block */
-+ unsigned seq; /* Must be this sequence number */
-+ unsigned sum; /* Just add up all the bytes in the tags */
-+};
-+
-+
-+static void yaffs_summary_clear(struct yaffs_dev *dev)
-+{
-+ if (!dev->sum_tags)
-+ return;
-+ memset(dev->sum_tags, 0, dev->chunks_per_summary *
-+ sizeof(struct yaffs_summary_tags));
-+}
-+
-+
-+void yaffs_summary_deinit(struct yaffs_dev *dev)
-+{
-+ kfree(dev->sum_tags);
-+ dev->sum_tags = NULL;
-+ kfree(dev->gc_sum_tags);
-+ dev->gc_sum_tags = NULL;
-+ dev->chunks_per_summary = 0;
-+}
-+
-+int yaffs_summary_init(struct yaffs_dev *dev)
-+{
-+ int sum_bytes;
-+ int chunks_used; /* Number of chunks used by summary */
-+ int sum_tags_bytes;
-+
-+ sum_bytes = dev->param.chunks_per_block *
-+ sizeof(struct yaffs_summary_tags);
-+
-+ chunks_used = (sum_bytes + dev->data_bytes_per_chunk - 1)/
-+ (dev->data_bytes_per_chunk -
-+ sizeof(struct yaffs_summary_header));
-+
-+ dev->chunks_per_summary = dev->param.chunks_per_block - chunks_used;
-+ sum_tags_bytes = sizeof(struct yaffs_summary_tags) *
-+ dev->chunks_per_summary;
-+ dev->sum_tags = kmalloc(sum_tags_bytes, GFP_NOFS);
-+ dev->gc_sum_tags = kmalloc(sum_tags_bytes, GFP_NOFS);
-+ if (!dev->sum_tags || !dev->gc_sum_tags) {
-+ yaffs_summary_deinit(dev);
-+ return YAFFS_FAIL;
-+ }
-+
-+ yaffs_summary_clear(dev);
-+
-+ return YAFFS_OK;
-+}
-+
-+static unsigned yaffs_summary_sum(struct yaffs_dev *dev)
-+{
-+ u8 *sum_buffer = (u8 *)dev->sum_tags;
-+ int i;
-+ unsigned sum = 0;
-+
-+ i = sizeof(struct yaffs_summary_tags) *
-+ dev->chunks_per_summary;
-+ while (i > 0) {
-+ sum += *sum_buffer;
-+ sum_buffer++;
-+ i--;
-+ }
-+
-+ return sum;
-+}
-+
-+static int yaffs_summary_write(struct yaffs_dev *dev, int blk)
-+{
-+ struct yaffs_ext_tags tags;
-+ u8 *buffer;
-+ u8 *sum_buffer = (u8 *)dev->sum_tags;
-+ int n_bytes;
-+ int chunk_in_nand;
-+ int chunk_in_block;
-+ int result;
-+ int this_tx;
-+ struct yaffs_summary_header hdr;
-+ int sum_bytes_per_chunk = dev->data_bytes_per_chunk - sizeof(hdr);
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, blk);
-+
-+ buffer = yaffs_get_temp_buffer(dev);
-+ n_bytes = sizeof(struct yaffs_summary_tags) *
-+ dev->chunks_per_summary;
-+ memset(&tags, 0, sizeof(struct yaffs_ext_tags));
-+ tags.obj_id = YAFFS_OBJECTID_SUMMARY;
-+ tags.chunk_id = 1;
-+ chunk_in_block = dev->chunks_per_summary;
-+ chunk_in_nand = dev->alloc_block * dev->param.chunks_per_block +
-+ dev->chunks_per_summary;
-+ hdr.version = YAFFS_SUMMARY_VERSION;
-+ hdr.block = blk;
-+ hdr.seq = bi->seq_number;
-+ hdr.sum = yaffs_summary_sum(dev);
-+
-+ do {
-+ this_tx = n_bytes;
-+ if (this_tx > sum_bytes_per_chunk)
-+ this_tx = sum_bytes_per_chunk;
-+ memcpy(buffer, &hdr, sizeof(hdr));
-+ memcpy(buffer + sizeof(hdr), sum_buffer, this_tx);
-+ tags.n_bytes = this_tx + sizeof(hdr);
-+ result = yaffs_wr_chunk_tags_nand(dev, chunk_in_nand,
-+ buffer, &tags);
-+
-+ if (result != YAFFS_OK)
-+ break;
-+ yaffs_set_chunk_bit(dev, blk, chunk_in_block);
-+ bi->pages_in_use++;
-+ dev->n_free_chunks--;
-+
-+ n_bytes -= this_tx;
-+ sum_buffer += this_tx;
-+ chunk_in_nand++;
-+ chunk_in_block++;
-+ tags.chunk_id++;
-+ } while (result == YAFFS_OK && n_bytes > 0);
-+ yaffs_release_temp_buffer(dev, buffer);
-+
-+
-+ if (result == YAFFS_OK)
-+ bi->has_summary = 1;
-+
-+
-+ return result;
-+}
-+
-+int yaffs_summary_read(struct yaffs_dev *dev,
-+ struct yaffs_summary_tags *st,
-+ int blk)
-+{
-+ struct yaffs_ext_tags tags;
-+ u8 *buffer;
-+ u8 *sum_buffer = (u8 *)st;
-+ int n_bytes;
-+ int chunk_id;
-+ int chunk_in_nand;
-+ int chunk_in_block;
-+ int result;
-+ int this_tx;
-+ struct yaffs_summary_header hdr;
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, blk);
-+ int sum_bytes_per_chunk = dev->data_bytes_per_chunk - sizeof(hdr);
-+ int sum_tags_bytes;
-+
-+ sum_tags_bytes = sizeof(struct yaffs_summary_tags) *
-+ dev->chunks_per_summary;
-+ buffer = yaffs_get_temp_buffer(dev);
-+ n_bytes = sizeof(struct yaffs_summary_tags) * dev->chunks_per_summary;
-+ chunk_in_block = dev->chunks_per_summary;
-+ chunk_in_nand = blk * dev->param.chunks_per_block +
-+ dev->chunks_per_summary;
-+ chunk_id = 1;
-+ do {
-+ this_tx = n_bytes;
-+ if (this_tx > sum_bytes_per_chunk)
-+ this_tx = sum_bytes_per_chunk;
-+ result = yaffs_rd_chunk_tags_nand(dev, chunk_in_nand,
-+ buffer, &tags);
-+
-+ if (tags.chunk_id != chunk_id ||
-+ tags.obj_id != YAFFS_OBJECTID_SUMMARY ||
-+ tags.chunk_used == 0 ||
-+ tags.ecc_result > YAFFS_ECC_RESULT_FIXED ||
-+ tags.n_bytes != (this_tx + sizeof(hdr)))
-+ result = YAFFS_FAIL;
-+ if (result != YAFFS_OK)
-+ break;
-+
-+ if (st == dev->sum_tags) {
-+ /* If we're scanning then update the block info */
-+ yaffs_set_chunk_bit(dev, blk, chunk_in_block);
-+ bi->pages_in_use++;
-+ }
-+ memcpy(&hdr, buffer, sizeof(hdr));
-+ memcpy(sum_buffer, buffer + sizeof(hdr), this_tx);
-+ n_bytes -= this_tx;
-+ sum_buffer += this_tx;
-+ chunk_in_nand++;
-+ chunk_in_block++;
-+ chunk_id++;
-+ } while (result == YAFFS_OK && n_bytes > 0);
-+ yaffs_release_temp_buffer(dev, buffer);
-+
-+ if (result == YAFFS_OK) {
-+ /* Verify header */
-+ if (hdr.version != YAFFS_SUMMARY_VERSION ||
-+ hdr.seq != bi->seq_number ||
-+ hdr.sum != yaffs_summary_sum(dev))
-+ result = YAFFS_FAIL;
-+ }
-+
-+ if (st == dev->sum_tags && result == YAFFS_OK)
-+ bi->has_summary = 1;
-+
-+ return result;
-+}
-+
-+int yaffs_summary_add(struct yaffs_dev *dev,
-+ struct yaffs_ext_tags *tags,
-+ int chunk_in_nand)
-+{
-+ struct yaffs_packed_tags2_tags_only tags_only;
-+ struct yaffs_summary_tags *sum_tags;
-+ int block_in_nand = chunk_in_nand / dev->param.chunks_per_block;
-+ int chunk_in_block = chunk_in_nand % dev->param.chunks_per_block;
-+
-+ if (!dev->sum_tags)
-+ return YAFFS_OK;
-+
-+ if (chunk_in_block >= 0 && chunk_in_block < dev->chunks_per_summary) {
-+ yaffs_pack_tags2_tags_only(&tags_only, tags);
-+ sum_tags = &dev->sum_tags[chunk_in_block];
-+ sum_tags->chunk_id = tags_only.chunk_id;
-+ sum_tags->n_bytes = tags_only.n_bytes;
-+ sum_tags->obj_id = tags_only.obj_id;
-+
-+ if (chunk_in_block == dev->chunks_per_summary - 1) {
-+ /* Time to write out the summary */
-+ yaffs_summary_write(dev, block_in_nand);
-+ yaffs_summary_clear(dev);
-+ yaffs_skip_rest_of_block(dev);
-+ }
-+ }
-+ return YAFFS_OK;
-+}
-+
-+int yaffs_summary_fetch(struct yaffs_dev *dev,
-+ struct yaffs_ext_tags *tags,
-+ int chunk_in_block)
-+{
-+ struct yaffs_packed_tags2_tags_only tags_only;
-+ struct yaffs_summary_tags *sum_tags;
-+ if (chunk_in_block >= 0 && chunk_in_block < dev->chunks_per_summary) {
-+ sum_tags = &dev->sum_tags[chunk_in_block];
-+ tags_only.chunk_id = sum_tags->chunk_id;
-+ tags_only.n_bytes = sum_tags->n_bytes;
-+ tags_only.obj_id = sum_tags->obj_id;
-+ yaffs_unpack_tags2_tags_only(tags, &tags_only);
-+ return YAFFS_OK;
-+ }
-+ return YAFFS_FAIL;
-+}
-+
-+void yaffs_summary_gc(struct yaffs_dev *dev, int blk)
-+{
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, blk);
-+ int i;
-+
-+ if (!bi->has_summary)
-+ return;
-+
-+ for (i = dev->chunks_per_summary;
-+ i < dev->param.chunks_per_block;
-+ i++) {
-+ if (yaffs_check_chunk_bit(dev, blk, i)) {
-+ yaffs_clear_chunk_bit(dev, blk, i);
-+ bi->pages_in_use--;
-+ dev->n_free_chunks++;
-+ }
-+ }
-+}
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_summary.h linux-3.10.40/fs/yaffs2/yaffs_summary.h
---- linux-3.10.40.orig/fs/yaffs2/yaffs_summary.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_summary.h 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,37 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_SUMMARY_H__
-+#define __YAFFS_SUMMARY_H__
-+
-+#include "yaffs_packedtags2.h"
-+
-+
-+int yaffs_summary_init(struct yaffs_dev *dev);
-+void yaffs_summary_deinit(struct yaffs_dev *dev);
-+
-+int yaffs_summary_add(struct yaffs_dev *dev,
-+ struct yaffs_ext_tags *tags,
-+ int chunk_in_block);
-+int yaffs_summary_fetch(struct yaffs_dev *dev,
-+ struct yaffs_ext_tags *tags,
-+ int chunk_in_block);
-+int yaffs_summary_read(struct yaffs_dev *dev,
-+ struct yaffs_summary_tags *st,
-+ int blk);
-+void yaffs_summary_gc(struct yaffs_dev *dev, int blk);
-+
-+
-+#endif
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_tagscompat.c linux-3.10.40/fs/yaffs2/yaffs_tagscompat.c
---- linux-3.10.40.orig/fs/yaffs2/yaffs_tagscompat.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_tagscompat.c 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,381 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_guts.h"
-+#include "yaffs_tagscompat.h"
-+#include "yaffs_ecc.h"
-+#include "yaffs_getblockinfo.h"
-+#include "yaffs_trace.h"
-+
-+static void yaffs_handle_rd_data_error(struct yaffs_dev *dev, int nand_chunk);
-+
-+
-+/********** Tags ECC calculations *********/
-+
-+
-+void yaffs_calc_tags_ecc(struct yaffs_tags *tags)
-+{
-+ /* Calculate an ecc */
-+ unsigned char *b = ((union yaffs_tags_union *)tags)->as_bytes;
-+ unsigned i, j;
-+ unsigned ecc = 0;
-+ unsigned bit = 0;
-+
-+ tags->ecc = 0;
-+
-+ for (i = 0; i < 8; i++) {
-+ for (j = 1; j & 0xff; j <<= 1) {
-+ bit++;
-+ if (b[i] & j)
-+ ecc ^= bit;
-+ }
-+ }
-+ tags->ecc = ecc;
-+}
-+
-+int yaffs_check_tags_ecc(struct yaffs_tags *tags)
-+{
-+ unsigned ecc = tags->ecc;
-+
-+ yaffs_calc_tags_ecc(tags);
-+
-+ ecc ^= tags->ecc;
-+
-+ if (ecc && ecc <= 64) {
-+ /* TODO: Handle the failure better. Retire? */
-+ unsigned char *b = ((union yaffs_tags_union *)tags)->as_bytes;
-+
-+ ecc--;
-+
-+ b[ecc / 8] ^= (1 << (ecc & 7));
-+
-+ /* Now recvalc the ecc */
-+ yaffs_calc_tags_ecc(tags);
-+
-+ return 1; /* recovered error */
-+ } else if (ecc) {
-+ /* Wierd ecc failure value */
-+ /* TODO Need to do somethiong here */
-+ return -1; /* unrecovered error */
-+ }
-+ return 0;
-+}
-+
-+/********** Tags **********/
-+
-+static void yaffs_load_tags_to_spare(struct yaffs_spare *spare_ptr,
-+ struct yaffs_tags *tags_ptr)
-+{
-+ union yaffs_tags_union *tu = (union yaffs_tags_union *)tags_ptr;
-+
-+ yaffs_calc_tags_ecc(tags_ptr);
-+
-+ spare_ptr->tb0 = tu->as_bytes[0];
-+ spare_ptr->tb1 = tu->as_bytes[1];
-+ spare_ptr->tb2 = tu->as_bytes[2];
-+ spare_ptr->tb3 = tu->as_bytes[3];
-+ spare_ptr->tb4 = tu->as_bytes[4];
-+ spare_ptr->tb5 = tu->as_bytes[5];
-+ spare_ptr->tb6 = tu->as_bytes[6];
-+ spare_ptr->tb7 = tu->as_bytes[7];
-+}
-+
-+static void yaffs_get_tags_from_spare(struct yaffs_dev *dev,
-+ struct yaffs_spare *spare_ptr,
-+ struct yaffs_tags *tags_ptr)
-+{
-+ union yaffs_tags_union *tu = (union yaffs_tags_union *)tags_ptr;
-+ int result;
-+
-+ tu->as_bytes[0] = spare_ptr->tb0;
-+ tu->as_bytes[1] = spare_ptr->tb1;
-+ tu->as_bytes[2] = spare_ptr->tb2;
-+ tu->as_bytes[3] = spare_ptr->tb3;
-+ tu->as_bytes[4] = spare_ptr->tb4;
-+ tu->as_bytes[5] = spare_ptr->tb5;
-+ tu->as_bytes[6] = spare_ptr->tb6;
-+ tu->as_bytes[7] = spare_ptr->tb7;
-+
-+ result = yaffs_check_tags_ecc(tags_ptr);
-+ if (result > 0)
-+ dev->n_tags_ecc_fixed++;
-+ else if (result < 0)
-+ dev->n_tags_ecc_unfixed++;
-+}
-+
-+static void yaffs_spare_init(struct yaffs_spare *spare)
-+{
-+ memset(spare, 0xff, sizeof(struct yaffs_spare));
-+}
-+
-+static int yaffs_wr_nand(struct yaffs_dev *dev,
-+ int nand_chunk, const u8 *data,
-+ struct yaffs_spare *spare)
-+{
-+ int data_size = dev->data_bytes_per_chunk;
-+
-+ return dev->drv.drv_write_chunk_fn(dev, nand_chunk,
-+ data, data_size,
-+ (u8 *) spare, sizeof(*spare));
-+}
-+
-+static int yaffs_rd_chunk_nand(struct yaffs_dev *dev,
-+ int nand_chunk,
-+ u8 *data,
-+ struct yaffs_spare *spare,
-+ enum yaffs_ecc_result *ecc_result,
-+ int correct_errors)
-+{
-+ int ret_val;
-+ struct yaffs_spare local_spare;
-+ int data_size;
-+ int spare_size;
-+ int ecc_result1, ecc_result2;
-+ u8 calc_ecc[3];
-+
-+ if (!spare) {
-+ /* If we don't have a real spare, then we use a local one. */
-+ /* Need this for the calculation of the ecc */
-+ spare = &local_spare;
-+ }
-+ data_size = dev->data_bytes_per_chunk;
-+ spare_size = sizeof(struct yaffs_spare);
-+
-+ if (dev->param.use_nand_ecc)
-+ return dev->drv.drv_read_chunk_fn(dev, nand_chunk,
-+ data, data_size,
-+ (u8 *) spare, spare_size,
-+ ecc_result);
-+
-+
-+ /* Handle the ECC at this level. */
-+
-+ ret_val = dev->drv.drv_read_chunk_fn(dev, nand_chunk,
-+ data, data_size,
-+ (u8 *)spare, spare_size,
-+ NULL);
-+ if (!data || !correct_errors)
-+ return ret_val;
-+
-+ /* Do ECC correction if needed. */
-+ yaffs_ecc_calc(data, calc_ecc);
-+ ecc_result1 = yaffs_ecc_correct(data, spare->ecc1, calc_ecc);
-+ yaffs_ecc_calc(&data[256], calc_ecc);
-+ ecc_result2 = yaffs_ecc_correct(&data[256], spare->ecc2, calc_ecc);
-+
-+ if (ecc_result1 > 0) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "**>>yaffs ecc error fix performed on chunk %d:0",
-+ nand_chunk);
-+ dev->n_ecc_fixed++;
-+ } else if (ecc_result1 < 0) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "**>>yaffs ecc error unfixed on chunk %d:0",
-+ nand_chunk);
-+ dev->n_ecc_unfixed++;
-+ }
-+
-+ if (ecc_result2 > 0) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "**>>yaffs ecc error fix performed on chunk %d:1",
-+ nand_chunk);
-+ dev->n_ecc_fixed++;
-+ } else if (ecc_result2 < 0) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "**>>yaffs ecc error unfixed on chunk %d:1",
-+ nand_chunk);
-+ dev->n_ecc_unfixed++;
-+ }
-+
-+ if (ecc_result1 || ecc_result2) {
-+ /* We had a data problem on this page */
-+ yaffs_handle_rd_data_error(dev, nand_chunk);
-+ }
-+
-+ if (ecc_result1 < 0 || ecc_result2 < 0)
-+ *ecc_result = YAFFS_ECC_RESULT_UNFIXED;
-+ else if (ecc_result1 > 0 || ecc_result2 > 0)
-+ *ecc_result = YAFFS_ECC_RESULT_FIXED;
-+ else
-+ *ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
-+
-+ return ret_val;
-+}
-+
-+/*
-+ * Functions for robustisizing
-+ */
-+
-+static void yaffs_handle_rd_data_error(struct yaffs_dev *dev, int nand_chunk)
-+{
-+ int flash_block = nand_chunk / dev->param.chunks_per_block;
-+
-+ /* Mark the block for retirement */
-+ yaffs_get_block_info(dev, flash_block + dev->block_offset)->
-+ needs_retiring = 1;
-+ yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
-+ "**>>Block %d marked for retirement",
-+ flash_block);
-+
-+ /* TODO:
-+ * Just do a garbage collection on the affected block
-+ * then retire the block
-+ * NB recursion
-+ */
-+}
-+
-+static int yaffs_tags_compat_wr(struct yaffs_dev *dev,
-+ int nand_chunk,
-+ const u8 *data, const struct yaffs_ext_tags *ext_tags)
-+{
-+ struct yaffs_spare spare;
-+ struct yaffs_tags tags;
-+
-+ yaffs_spare_init(&spare);
-+
-+ if (ext_tags->is_deleted)
-+ spare.page_status = 0;
-+ else {
-+ tags.obj_id = ext_tags->obj_id;
-+ tags.chunk_id = ext_tags->chunk_id;
-+
-+ tags.n_bytes_lsb = ext_tags->n_bytes & (1024 - 1);
-+
-+ if (dev->data_bytes_per_chunk >= 1024)
-+ tags.n_bytes_msb = (ext_tags->n_bytes >> 10) & 3;
-+ else
-+ tags.n_bytes_msb = 3;
-+
-+ tags.serial_number = ext_tags->serial_number;
-+
-+ if (!dev->param.use_nand_ecc && data) {
-+ yaffs_ecc_calc(data, spare.ecc1);
-+ yaffs_ecc_calc(&data[256], spare.ecc2);
-+ }
-+
-+ yaffs_load_tags_to_spare(&spare, &tags);
-+ }
-+ return yaffs_wr_nand(dev, nand_chunk, data, &spare);
-+}
-+
-+static int yaffs_tags_compat_rd(struct yaffs_dev *dev,
-+ int nand_chunk,
-+ u8 *data, struct yaffs_ext_tags *ext_tags)
-+{
-+ struct yaffs_spare spare;
-+ struct yaffs_tags tags;
-+ enum yaffs_ecc_result ecc_result = YAFFS_ECC_RESULT_UNKNOWN;
-+ static struct yaffs_spare spare_ff;
-+ static int init;
-+ int deleted;
-+
-+ if (!init) {
-+ memset(&spare_ff, 0xff, sizeof(spare_ff));
-+ init = 1;
-+ }
-+
-+ if (!yaffs_rd_chunk_nand(dev, nand_chunk,
-+ data, &spare, &ecc_result, 1))
-+ return YAFFS_FAIL;
-+
-+ /* ext_tags may be NULL */
-+ if (!ext_tags)
-+ return YAFFS_OK;
-+
-+ deleted = (hweight8(spare.page_status) < 7) ? 1 : 0;
-+
-+ ext_tags->is_deleted = deleted;
-+ ext_tags->ecc_result = ecc_result;
-+ ext_tags->block_bad = 0; /* We're reading it */
-+ /* therefore it is not a bad block */
-+ ext_tags->chunk_used =
-+ memcmp(&spare_ff, &spare, sizeof(spare_ff)) ? 1 : 0;
-+
-+ if (ext_tags->chunk_used) {
-+ yaffs_get_tags_from_spare(dev, &spare, &tags);
-+ ext_tags->obj_id = tags.obj_id;
-+ ext_tags->chunk_id = tags.chunk_id;
-+ ext_tags->n_bytes = tags.n_bytes_lsb;
-+
-+ if (dev->data_bytes_per_chunk >= 1024)
-+ ext_tags->n_bytes |=
-+ (((unsigned)tags.n_bytes_msb) << 10);
-+
-+ ext_tags->serial_number = tags.serial_number;
-+ }
-+
-+ return YAFFS_OK;
-+}
-+
-+static int yaffs_tags_compat_mark_bad(struct yaffs_dev *dev, int flash_block)
-+{
-+ struct yaffs_spare spare;
-+
-+ memset(&spare, 0xff, sizeof(struct yaffs_spare));
-+
-+ spare.block_status = 'Y';
-+
-+ yaffs_wr_nand(dev, flash_block * dev->param.chunks_per_block, NULL,
-+ &spare);
-+ yaffs_wr_nand(dev, flash_block * dev->param.chunks_per_block + 1,
-+ NULL, &spare);
-+
-+ return YAFFS_OK;
-+}
-+
-+static int yaffs_tags_compat_query_block(struct yaffs_dev *dev,
-+ int block_no,
-+ enum yaffs_block_state *state,
-+ u32 *seq_number)
-+{
-+ struct yaffs_spare spare0, spare1;
-+ static struct yaffs_spare spare_ff;
-+ static int init;
-+ enum yaffs_ecc_result dummy;
-+
-+ if (!init) {
-+ memset(&spare_ff, 0xff, sizeof(spare_ff));
-+ init = 1;
-+ }
-+
-+ *seq_number = 0;
-+
-+ /* Look for bad block markers in the first two chunks */
-+ yaffs_rd_chunk_nand(dev, block_no * dev->param.chunks_per_block,
-+ NULL, &spare0, &dummy, 0);
-+ yaffs_rd_chunk_nand(dev, block_no * dev->param.chunks_per_block + 1,
-+ NULL, &spare1, &dummy, 0);
-+
-+ if (hweight8(spare0.block_status & spare1.block_status) < 7)
-+ *state = YAFFS_BLOCK_STATE_DEAD;
-+ else if (memcmp(&spare_ff, &spare0, sizeof(spare_ff)) == 0)
-+ *state = YAFFS_BLOCK_STATE_EMPTY;
-+ else
-+ *state = YAFFS_BLOCK_STATE_NEEDS_SCAN;
-+
-+ return YAFFS_OK;
-+}
-+
-+void yaffs_tags_compat_install(struct yaffs_dev *dev)
-+{
-+ if(dev->param.is_yaffs2)
-+ return;
-+ if(!dev->tagger.write_chunk_tags_fn)
-+ dev->tagger.write_chunk_tags_fn = yaffs_tags_compat_wr;
-+ if(!dev->tagger.read_chunk_tags_fn)
-+ dev->tagger.read_chunk_tags_fn = yaffs_tags_compat_rd;
-+ if(!dev->tagger.query_block_fn)
-+ dev->tagger.query_block_fn = yaffs_tags_compat_query_block;
-+ if(!dev->tagger.mark_bad_fn)
-+ dev->tagger.mark_bad_fn = yaffs_tags_compat_mark_bad;
-+}
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_tagscompat.h linux-3.10.40/fs/yaffs2/yaffs_tagscompat.h
---- linux-3.10.40.orig/fs/yaffs2/yaffs_tagscompat.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_tagscompat.h 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,44 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_TAGSCOMPAT_H__
-+#define __YAFFS_TAGSCOMPAT_H__
-+
-+
-+#include "yaffs_guts.h"
-+
-+#if 0
-+
-+
-+int yaffs_tags_compat_wr(struct yaffs_dev *dev,
-+ int nand_chunk,
-+ const u8 *data, const struct yaffs_ext_tags *tags);
-+int yaffs_tags_compat_rd(struct yaffs_dev *dev,
-+ int nand_chunk,
-+ u8 *data, struct yaffs_ext_tags *tags);
-+int yaffs_tags_compat_mark_bad(struct yaffs_dev *dev, int block_no);
-+int yaffs_tags_compat_query_block(struct yaffs_dev *dev,
-+ int block_no,
-+ enum yaffs_block_state *state,
-+ u32 *seq_number);
-+
-+#endif
-+
-+
-+void yaffs_tags_compat_install(struct yaffs_dev *dev);
-+void yaffs_calc_tags_ecc(struct yaffs_tags *tags);
-+int yaffs_check_tags_ecc(struct yaffs_tags *tags);
-+
-+#endif
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_tagsmarshall.c linux-3.10.40/fs/yaffs2/yaffs_tagsmarshall.c
---- linux-3.10.40.orig/fs/yaffs2/yaffs_tagsmarshall.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_tagsmarshall.c 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,199 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_guts.h"
-+#include "yaffs_trace.h"
-+#include "yaffs_packedtags2.h"
-+
-+static int yaffs_tags_marshall_write(struct yaffs_dev *dev,
-+ int nand_chunk, const u8 *data,
-+ const struct yaffs_ext_tags *tags)
-+{
-+ struct yaffs_packed_tags2 pt;
-+ int retval;
-+
-+ int packed_tags_size =
-+ dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt);
-+ void *packed_tags_ptr =
-+ dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt;
-+
-+ yaffs_trace(YAFFS_TRACE_MTD,
-+ "yaffs_tags_marshall_write chunk %d data %p tags %p",
-+ nand_chunk, data, tags);
-+
-+ /* For yaffs2 writing there must be both data and tags.
-+ * If we're using inband tags, then the tags are stuffed into
-+ * the end of the data buffer.
-+ */
-+ if (!data || !tags)
-+ BUG();
-+ else if (dev->param.inband_tags) {
-+ struct yaffs_packed_tags2_tags_only *pt2tp;
-+ pt2tp =
-+ (struct yaffs_packed_tags2_tags_only *)(data +
-+ dev->
-+ data_bytes_per_chunk);
-+ yaffs_pack_tags2_tags_only(pt2tp, tags);
-+ } else {
-+ yaffs_pack_tags2(&pt, tags, !dev->param.no_tags_ecc);
-+ }
-+
-+ retval = dev->drv.drv_write_chunk_fn(dev, nand_chunk,
-+ data, dev->param.total_bytes_per_chunk,
-+ (dev->param.inband_tags) ? NULL : packed_tags_ptr,
-+ (dev->param.inband_tags) ? 0 : packed_tags_size);
-+
-+ return retval;
-+}
-+
-+static int yaffs_tags_marshall_read(struct yaffs_dev *dev,
-+ int nand_chunk, u8 *data,
-+ struct yaffs_ext_tags *tags)
-+{
-+ int retval = 0;
-+ int local_data = 0;
-+ u8 spare_buffer[100];
-+ enum yaffs_ecc_result ecc_result;
-+
-+ struct yaffs_packed_tags2 pt;
-+
-+ int packed_tags_size =
-+ dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt);
-+ void *packed_tags_ptr =
-+ dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt;
-+
-+ yaffs_trace(YAFFS_TRACE_MTD,
-+ "yaffs_tags_marshall_read chunk %d data %p tags %p",
-+ nand_chunk, data, tags);
-+
-+ if (dev->param.inband_tags) {
-+ if (!data) {
-+ local_data = 1;
-+ data = yaffs_get_temp_buffer(dev);
-+ }
-+ }
-+
-+ if (dev->param.inband_tags || (data && !tags))
-+ retval = dev->drv.drv_read_chunk_fn(dev, nand_chunk,
-+ data, dev->param.total_bytes_per_chunk,
-+ NULL, 0,
-+ &ecc_result);
-+ else if (tags)
-+ retval = dev->drv.drv_read_chunk_fn(dev, nand_chunk,
-+ data, dev->param.total_bytes_per_chunk,
-+ spare_buffer, packed_tags_size,
-+ &ecc_result);
-+ else
-+ BUG();
-+
-+
-+ if (dev->param.inband_tags) {
-+ if (tags) {
-+ struct yaffs_packed_tags2_tags_only *pt2tp;
-+ pt2tp =
-+ (struct yaffs_packed_tags2_tags_only *)
-+ &data[dev->data_bytes_per_chunk];
-+ yaffs_unpack_tags2_tags_only(tags, pt2tp);
-+ }
-+ } else if (tags) {
-+ memcpy(packed_tags_ptr, spare_buffer, packed_tags_size);
-+ yaffs_unpack_tags2(tags, &pt, !dev->param.no_tags_ecc);
-+ }
-+
-+ if (local_data)
-+ yaffs_release_temp_buffer(dev, data);
-+
-+ if (tags && ecc_result == YAFFS_ECC_RESULT_UNFIXED) {
-+ tags->ecc_result = YAFFS_ECC_RESULT_UNFIXED;
-+ dev->n_ecc_unfixed++;
-+ }
-+
-+ if (tags && ecc_result == -YAFFS_ECC_RESULT_FIXED) {
-+ if (tags->ecc_result <= YAFFS_ECC_RESULT_NO_ERROR)
-+ tags->ecc_result = YAFFS_ECC_RESULT_FIXED;
-+ dev->n_ecc_fixed++;
-+ }
-+
-+ if (ecc_result < YAFFS_ECC_RESULT_UNFIXED)
-+ return YAFFS_OK;
-+ else
-+ return YAFFS_FAIL;
-+}
-+
-+static int yaffs_tags_marshall_query_block(struct yaffs_dev *dev, int block_no,
-+ enum yaffs_block_state *state,
-+ u32 *seq_number)
-+{
-+ int retval;
-+
-+ yaffs_trace(YAFFS_TRACE_MTD, "yaffs_tags_marshall_query_block %d",
-+ block_no);
-+
-+ retval = dev->drv.drv_check_bad_fn(dev, block_no);
-+
-+ if (retval== YAFFS_FAIL) {
-+ yaffs_trace(YAFFS_TRACE_MTD, "block is bad");
-+
-+ *state = YAFFS_BLOCK_STATE_DEAD;
-+ *seq_number = 0;
-+ } else {
-+ struct yaffs_ext_tags t;
-+
-+ yaffs_tags_marshall_read(dev,
-+ block_no * dev->param.chunks_per_block,
-+ NULL, &t);
-+
-+ if (t.chunk_used) {
-+ *seq_number = t.seq_number;
-+ *state = YAFFS_BLOCK_STATE_NEEDS_SCAN;
-+ } else {
-+ *seq_number = 0;
-+ *state = YAFFS_BLOCK_STATE_EMPTY;
-+ }
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_MTD,
-+ "block query returns seq %d state %d",
-+ *seq_number, *state);
-+
-+ if (retval == 0)
-+ return YAFFS_OK;
-+ else
-+ return YAFFS_FAIL;
-+}
-+
-+static int yaffs_tags_marshall_mark_bad(struct yaffs_dev *dev, int block_no)
-+{
-+ return dev->drv.drv_mark_bad_fn(dev, block_no);
-+
-+}
-+
-+
-+void yaffs_tags_marshall_install(struct yaffs_dev *dev)
-+{
-+ if (!dev->param.is_yaffs2)
-+ return;
-+
-+ if (!dev->tagger.write_chunk_tags_fn)
-+ dev->tagger.write_chunk_tags_fn = yaffs_tags_marshall_write;
-+
-+ if (!dev->tagger.read_chunk_tags_fn)
-+ dev->tagger.read_chunk_tags_fn = yaffs_tags_marshall_read;
-+
-+ if (!dev->tagger.query_block_fn)
-+ dev->tagger.query_block_fn = yaffs_tags_marshall_query_block;
-+
-+ if (!dev->tagger.mark_bad_fn)
-+ dev->tagger.mark_bad_fn = yaffs_tags_marshall_mark_bad;
-+
-+}
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_tagsmarshall.h linux-3.10.40/fs/yaffs2/yaffs_tagsmarshall.h
---- linux-3.10.40.orig/fs/yaffs2/yaffs_tagsmarshall.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_tagsmarshall.h 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,22 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_TAGSMARSHALL_H__
-+#define __YAFFS_TAGSMARSHALL_H__
-+
-+#include "yaffs_guts.h"
-+void yaffs_tags_marshall_install(struct yaffs_dev *dev);
-+
-+#endif
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_trace.h linux-3.10.40/fs/yaffs2/yaffs_trace.h
---- linux-3.10.40.orig/fs/yaffs2/yaffs_trace.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_trace.h 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,57 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YTRACE_H__
-+#define __YTRACE_H__
-+
-+extern unsigned int yaffs_trace_mask;
-+extern unsigned int yaffs_wr_attempts;
-+
-+/*
-+ * Tracing flags.
-+ * The flags masked in YAFFS_TRACE_ALWAYS are always traced.
-+ */
-+
-+#define YAFFS_TRACE_OS 0x00000002
-+#define YAFFS_TRACE_ALLOCATE 0x00000004
-+#define YAFFS_TRACE_SCAN 0x00000008
-+#define YAFFS_TRACE_BAD_BLOCKS 0x00000010
-+#define YAFFS_TRACE_ERASE 0x00000020
-+#define YAFFS_TRACE_GC 0x00000040
-+#define YAFFS_TRACE_WRITE 0x00000080
-+#define YAFFS_TRACE_TRACING 0x00000100
-+#define YAFFS_TRACE_DELETION 0x00000200
-+#define YAFFS_TRACE_BUFFERS 0x00000400
-+#define YAFFS_TRACE_NANDACCESS 0x00000800
-+#define YAFFS_TRACE_GC_DETAIL 0x00001000
-+#define YAFFS_TRACE_SCAN_DEBUG 0x00002000
-+#define YAFFS_TRACE_MTD 0x00004000
-+#define YAFFS_TRACE_CHECKPOINT 0x00008000
-+
-+#define YAFFS_TRACE_VERIFY 0x00010000
-+#define YAFFS_TRACE_VERIFY_NAND 0x00020000
-+#define YAFFS_TRACE_VERIFY_FULL 0x00040000
-+#define YAFFS_TRACE_VERIFY_ALL 0x000f0000
-+
-+#define YAFFS_TRACE_SYNC 0x00100000
-+#define YAFFS_TRACE_BACKGROUND 0x00200000
-+#define YAFFS_TRACE_LOCK 0x00400000
-+#define YAFFS_TRACE_MOUNT 0x00800000
-+
-+#define YAFFS_TRACE_ERROR 0x40000000
-+#define YAFFS_TRACE_BUG 0x80000000
-+#define YAFFS_TRACE_ALWAYS 0xf0000000
-+
-+#endif
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_verify.c linux-3.10.40/fs/yaffs2/yaffs_verify.c
---- linux-3.10.40.orig/fs/yaffs2/yaffs_verify.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_verify.c 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,529 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_verify.h"
-+#include "yaffs_trace.h"
-+#include "yaffs_bitmap.h"
-+#include "yaffs_getblockinfo.h"
-+#include "yaffs_nand.h"
-+
-+int yaffs_skip_verification(struct yaffs_dev *dev)
-+{
-+ (void) dev;
-+ return !(yaffs_trace_mask &
-+ (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL));
-+}
-+
-+static int yaffs_skip_full_verification(struct yaffs_dev *dev)
-+{
-+ (void) dev;
-+ return !(yaffs_trace_mask & (YAFFS_TRACE_VERIFY_FULL));
-+}
-+
-+static int yaffs_skip_nand_verification(struct yaffs_dev *dev)
-+{
-+ (void) dev;
-+ return !(yaffs_trace_mask & (YAFFS_TRACE_VERIFY_NAND));
-+}
-+
-+static const char * const block_state_name[] = {
-+ "Unknown",
-+ "Needs scan",
-+ "Scanning",
-+ "Empty",
-+ "Allocating",
-+ "Full",
-+ "Dirty",
-+ "Checkpoint",
-+ "Collecting",
-+ "Dead"
-+};
-+
-+void yaffs_verify_blk(struct yaffs_dev *dev, struct yaffs_block_info *bi, int n)
-+{
-+ int actually_used;
-+ int in_use;
-+
-+ if (yaffs_skip_verification(dev))
-+ return;
-+
-+ /* Report illegal runtime states */
-+ if (bi->block_state >= YAFFS_NUMBER_OF_BLOCK_STATES)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Block %d has undefined state %d",
-+ n, bi->block_state);
-+
-+ switch (bi->block_state) {
-+ case YAFFS_BLOCK_STATE_UNKNOWN:
-+ case YAFFS_BLOCK_STATE_SCANNING:
-+ case YAFFS_BLOCK_STATE_NEEDS_SCAN:
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Block %d has bad run-state %s",
-+ n, block_state_name[bi->block_state]);
-+ }
-+
-+ /* Check pages in use and soft deletions are legal */
-+
-+ actually_used = bi->pages_in_use - bi->soft_del_pages;
-+
-+ if (bi->pages_in_use < 0 ||
-+ bi->pages_in_use > dev->param.chunks_per_block ||
-+ bi->soft_del_pages < 0 ||
-+ bi->soft_del_pages > dev->param.chunks_per_block ||
-+ actually_used < 0 || actually_used > dev->param.chunks_per_block)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Block %d has illegal values pages_in_used %d soft_del_pages %d",
-+ n, bi->pages_in_use, bi->soft_del_pages);
-+
-+ /* Check chunk bitmap legal */
-+ in_use = yaffs_count_chunk_bits(dev, n);
-+ if (in_use != bi->pages_in_use)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Block %d has inconsistent values pages_in_use %d counted chunk bits %d",
-+ n, bi->pages_in_use, in_use);
-+}
-+
-+void yaffs_verify_collected_blk(struct yaffs_dev *dev,
-+ struct yaffs_block_info *bi, int n)
-+{
-+ yaffs_verify_blk(dev, bi, n);
-+
-+ /* After collection the block should be in the erased state */
-+
-+ if (bi->block_state != YAFFS_BLOCK_STATE_COLLECTING &&
-+ bi->block_state != YAFFS_BLOCK_STATE_EMPTY) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "Block %d is in state %d after gc, should be erased",
-+ n, bi->block_state);
-+ }
-+}
-+
-+void yaffs_verify_blocks(struct yaffs_dev *dev)
-+{
-+ int i;
-+ int state_count[YAFFS_NUMBER_OF_BLOCK_STATES];
-+ int illegal_states = 0;
-+
-+ if (yaffs_skip_verification(dev))
-+ return;
-+
-+ memset(state_count, 0, sizeof(state_count));
-+
-+ for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, i);
-+ yaffs_verify_blk(dev, bi, i);
-+
-+ if (bi->block_state < YAFFS_NUMBER_OF_BLOCK_STATES)
-+ state_count[bi->block_state]++;
-+ else
-+ illegal_states++;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_VERIFY, "Block summary");
-+
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "%d blocks have illegal states",
-+ illegal_states);
-+ if (state_count[YAFFS_BLOCK_STATE_ALLOCATING] > 1)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Too many allocating blocks");
-+
-+ for (i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "%s %d blocks",
-+ block_state_name[i], state_count[i]);
-+
-+ if (dev->blocks_in_checkpt != state_count[YAFFS_BLOCK_STATE_CHECKPOINT])
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Checkpoint block count wrong dev %d count %d",
-+ dev->blocks_in_checkpt,
-+ state_count[YAFFS_BLOCK_STATE_CHECKPOINT]);
-+
-+ if (dev->n_erased_blocks != state_count[YAFFS_BLOCK_STATE_EMPTY])
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Erased block count wrong dev %d count %d",
-+ dev->n_erased_blocks,
-+ state_count[YAFFS_BLOCK_STATE_EMPTY]);
-+
-+ if (state_count[YAFFS_BLOCK_STATE_COLLECTING] > 1)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Too many collecting blocks %d (max is 1)",
-+ state_count[YAFFS_BLOCK_STATE_COLLECTING]);
-+}
-+
-+/*
-+ * Verify the object header. oh must be valid, but obj and tags may be NULL in
-+ * which case those tests will not be performed.
-+ */
-+void yaffs_verify_oh(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh,
-+ struct yaffs_ext_tags *tags, int parent_check)
-+{
-+ if (obj && yaffs_skip_verification(obj->my_dev))
-+ return;
-+
-+ if (!(tags && obj && oh)) {
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Verifying object header tags %p obj %p oh %p",
-+ tags, obj, oh);
-+ return;
-+ }
-+
-+ if (oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN ||
-+ oh->type > YAFFS_OBJECT_TYPE_MAX)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d header type is illegal value 0x%x",
-+ tags->obj_id, oh->type);
-+
-+ if (tags->obj_id != obj->obj_id)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d header mismatch obj_id %d",
-+ tags->obj_id, obj->obj_id);
-+
-+ /*
-+ * Check that the object's parent ids match if parent_check requested.
-+ *
-+ * Tests do not apply to the root object.
-+ */
-+
-+ if (parent_check && tags->obj_id > 1 && !obj->parent)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d header mismatch parent_id %d obj->parent is NULL",
-+ tags->obj_id, oh->parent_obj_id);
-+
-+ if (parent_check && obj->parent &&
-+ oh->parent_obj_id != obj->parent->obj_id &&
-+ (oh->parent_obj_id != YAFFS_OBJECTID_UNLINKED ||
-+ obj->parent->obj_id != YAFFS_OBJECTID_DELETED))
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d header mismatch parent_id %d parent_obj_id %d",
-+ tags->obj_id, oh->parent_obj_id,
-+ obj->parent->obj_id);
-+
-+ if (tags->obj_id > 1 && oh->name[0] == 0) /* Null name */
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d header name is NULL",
-+ obj->obj_id);
-+
-+ if (tags->obj_id > 1 && ((u8) (oh->name[0])) == 0xff) /* Junk name */
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d header name is 0xff",
-+ obj->obj_id);
-+}
-+
-+void yaffs_verify_file(struct yaffs_obj *obj)
-+{
-+ u32 x;
-+ int required_depth;
-+ int actual_depth;
-+ int last_chunk;
-+ u32 offset_in_chunk;
-+ u32 the_chunk;
-+
-+ u32 i;
-+ struct yaffs_dev *dev;
-+ struct yaffs_ext_tags tags;
-+ struct yaffs_tnode *tn;
-+ u32 obj_id;
-+
-+ if (!obj)
-+ return;
-+
-+ if (yaffs_skip_verification(obj->my_dev))
-+ return;
-+
-+ dev = obj->my_dev;
-+ obj_id = obj->obj_id;
-+
-+
-+ /* Check file size is consistent with tnode depth */
-+ yaffs_addr_to_chunk(dev, obj->variant.file_variant.file_size,
-+ &last_chunk, &offset_in_chunk);
-+ last_chunk++;
-+ x = last_chunk >> YAFFS_TNODES_LEVEL0_BITS;
-+ required_depth = 0;
-+ while (x > 0) {
-+ x >>= YAFFS_TNODES_INTERNAL_BITS;
-+ required_depth++;
-+ }
-+
-+ actual_depth = obj->variant.file_variant.top_level;
-+
-+ /* Check that the chunks in the tnode tree are all correct.
-+ * We do this by scanning through the tnode tree and
-+ * checking the tags for every chunk match.
-+ */
-+
-+ if (yaffs_skip_nand_verification(dev))
-+ return;
-+
-+ for (i = 1; i <= last_chunk; i++) {
-+ tn = yaffs_find_tnode_0(dev, &obj->variant.file_variant, i);
-+
-+ if (!tn)
-+ continue;
-+
-+ the_chunk = yaffs_get_group_base(dev, tn, i);
-+ if (the_chunk > 0) {
-+ yaffs_rd_chunk_tags_nand(dev, the_chunk, NULL,
-+ &tags);
-+ if (tags.obj_id != obj_id || tags.chunk_id != i)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Object %d chunk_id %d NAND mismatch chunk %d tags (%d:%d)",
-+ obj_id, i, the_chunk,
-+ tags.obj_id, tags.chunk_id);
-+ }
-+ }
-+}
-+
-+void yaffs_verify_link(struct yaffs_obj *obj)
-+{
-+ if (obj && yaffs_skip_verification(obj->my_dev))
-+ return;
-+
-+ /* Verify sane equivalent object */
-+}
-+
-+void yaffs_verify_symlink(struct yaffs_obj *obj)
-+{
-+ if (obj && yaffs_skip_verification(obj->my_dev))
-+ return;
-+
-+ /* Verify symlink string */
-+}
-+
-+void yaffs_verify_special(struct yaffs_obj *obj)
-+{
-+ if (obj && yaffs_skip_verification(obj->my_dev))
-+ return;
-+}
-+
-+void yaffs_verify_obj(struct yaffs_obj *obj)
-+{
-+ struct yaffs_dev *dev;
-+ u32 chunk_min;
-+ u32 chunk_max;
-+ u32 chunk_id_ok;
-+ u32 chunk_in_range;
-+ u32 chunk_wrongly_deleted;
-+ u32 chunk_valid;
-+
-+ if (!obj)
-+ return;
-+
-+ if (obj->being_created)
-+ return;
-+
-+ dev = obj->my_dev;
-+
-+ if (yaffs_skip_verification(dev))
-+ return;
-+
-+ /* Check sane object header chunk */
-+
-+ chunk_min = dev->internal_start_block * dev->param.chunks_per_block;
-+ chunk_max =
-+ (dev->internal_end_block + 1) * dev->param.chunks_per_block - 1;
-+
-+ chunk_in_range = (((unsigned)(obj->hdr_chunk)) >= chunk_min &&
-+ ((unsigned)(obj->hdr_chunk)) <= chunk_max);
-+ chunk_id_ok = chunk_in_range || (obj->hdr_chunk == 0);
-+ chunk_valid = chunk_in_range &&
-+ yaffs_check_chunk_bit(dev,
-+ obj->hdr_chunk / dev->param.chunks_per_block,
-+ obj->hdr_chunk % dev->param.chunks_per_block);
-+ chunk_wrongly_deleted = chunk_in_range && !chunk_valid;
-+
-+ if (!obj->fake && (!chunk_id_ok || chunk_wrongly_deleted))
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d has chunk_id %d %s %s",
-+ obj->obj_id, obj->hdr_chunk,
-+ chunk_id_ok ? "" : ",out of range",
-+ chunk_wrongly_deleted ? ",marked as deleted" : "");
-+
-+ if (chunk_valid && !yaffs_skip_nand_verification(dev)) {
-+ struct yaffs_ext_tags tags;
-+ struct yaffs_obj_hdr *oh;
-+ u8 *buffer = yaffs_get_temp_buffer(dev);
-+
-+ oh = (struct yaffs_obj_hdr *)buffer;
-+
-+ yaffs_rd_chunk_tags_nand(dev, obj->hdr_chunk, buffer, &tags);
-+
-+ yaffs_verify_oh(obj, oh, &tags, 1);
-+
-+ yaffs_release_temp_buffer(dev, buffer);
-+ }
-+
-+ /* Verify it has a parent */
-+ if (obj && !obj->fake && (!obj->parent || obj->parent->my_dev != dev)) {
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d has parent pointer %p which does not look like an object",
-+ obj->obj_id, obj->parent);
-+ }
-+
-+ /* Verify parent is a directory */
-+ if (obj->parent &&
-+ obj->parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d's parent is not a directory (type %d)",
-+ obj->obj_id, obj->parent->variant_type);
-+ }
-+
-+ switch (obj->variant_type) {
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ yaffs_verify_file(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ yaffs_verify_symlink(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ yaffs_verify_dir(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ yaffs_verify_link(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ yaffs_verify_special(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ default:
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d has illegaltype %d",
-+ obj->obj_id, obj->variant_type);
-+ break;
-+ }
-+}
-+
-+void yaffs_verify_objects(struct yaffs_dev *dev)
-+{
-+ struct yaffs_obj *obj;
-+ int i;
-+ struct list_head *lh;
-+
-+ if (yaffs_skip_verification(dev))
-+ return;
-+
-+ /* Iterate through the objects in each hash entry */
-+
-+ for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
-+ list_for_each(lh, &dev->obj_bucket[i].list) {
-+ obj = list_entry(lh, struct yaffs_obj, hash_link);
-+ yaffs_verify_obj(obj);
-+ }
-+ }
-+}
-+
-+void yaffs_verify_obj_in_dir(struct yaffs_obj *obj)
-+{
-+ struct list_head *lh;
-+ struct yaffs_obj *list_obj;
-+ int count = 0;
-+
-+ if (!obj) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "No object to verify");
-+ BUG();
-+ return;
-+ }
-+
-+ if (yaffs_skip_verification(obj->my_dev))
-+ return;
-+
-+ if (!obj->parent) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "Object does not have parent");
-+ BUG();
-+ return;
-+ }
-+
-+ if (obj->parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "Parent is not directory");
-+ BUG();
-+ }
-+
-+ /* Iterate through the objects in each hash entry */
-+
-+ list_for_each(lh, &obj->parent->variant.dir_variant.children) {
-+ list_obj = list_entry(lh, struct yaffs_obj, siblings);
-+ yaffs_verify_obj(list_obj);
-+ if (obj == list_obj)
-+ count++;
-+ }
-+
-+ if (count != 1) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "Object in directory %d times",
-+ count);
-+ BUG();
-+ }
-+}
-+
-+void yaffs_verify_dir(struct yaffs_obj *directory)
-+{
-+ struct list_head *lh;
-+ struct yaffs_obj *list_obj;
-+
-+ if (!directory) {
-+ BUG();
-+ return;
-+ }
-+
-+ if (yaffs_skip_full_verification(directory->my_dev))
-+ return;
-+
-+ if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "Directory has wrong type: %d",
-+ directory->variant_type);
-+ BUG();
-+ }
-+
-+ /* Iterate through the objects in each hash entry */
-+
-+ list_for_each(lh, &directory->variant.dir_variant.children) {
-+ list_obj = list_entry(lh, struct yaffs_obj, siblings);
-+ if (list_obj->parent != directory) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "Object in directory list has wrong parent %p",
-+ list_obj->parent);
-+ BUG();
-+ }
-+ yaffs_verify_obj_in_dir(list_obj);
-+ }
-+}
-+
-+static int yaffs_free_verification_failures;
-+
-+void yaffs_verify_free_chunks(struct yaffs_dev *dev)
-+{
-+ int counted;
-+ int difference;
-+
-+ if (yaffs_skip_verification(dev))
-+ return;
-+
-+ counted = yaffs_count_free_chunks(dev);
-+
-+ difference = dev->n_free_chunks - counted;
-+
-+ if (difference) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "Freechunks verification failure %d %d %d",
-+ dev->n_free_chunks, counted, difference);
-+ yaffs_free_verification_failures++;
-+ }
-+}
-+
-+int yaffs_verify_file_sane(struct yaffs_obj *in)
-+{
-+ (void) in;
-+ return YAFFS_OK;
-+}
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_verify.h linux-3.10.40/fs/yaffs2/yaffs_verify.h
---- linux-3.10.40.orig/fs/yaffs2/yaffs_verify.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_verify.h 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,43 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_VERIFY_H__
-+#define __YAFFS_VERIFY_H__
-+
-+#include "yaffs_guts.h"
-+
-+void yaffs_verify_blk(struct yaffs_dev *dev, struct yaffs_block_info *bi,
-+ int n);
-+void yaffs_verify_collected_blk(struct yaffs_dev *dev,
-+ struct yaffs_block_info *bi, int n);
-+void yaffs_verify_blocks(struct yaffs_dev *dev);
-+
-+void yaffs_verify_oh(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh,
-+ struct yaffs_ext_tags *tags, int parent_check);
-+void yaffs_verify_file(struct yaffs_obj *obj);
-+void yaffs_verify_link(struct yaffs_obj *obj);
-+void yaffs_verify_symlink(struct yaffs_obj *obj);
-+void yaffs_verify_special(struct yaffs_obj *obj);
-+void yaffs_verify_obj(struct yaffs_obj *obj);
-+void yaffs_verify_objects(struct yaffs_dev *dev);
-+void yaffs_verify_obj_in_dir(struct yaffs_obj *obj);
-+void yaffs_verify_dir(struct yaffs_obj *directory);
-+void yaffs_verify_free_chunks(struct yaffs_dev *dev);
-+
-+int yaffs_verify_file_sane(struct yaffs_obj *obj);
-+
-+int yaffs_skip_verification(struct yaffs_dev *dev);
-+
-+#endif
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_vfs.c linux-3.10.40/fs/yaffs2/yaffs_vfs.c
---- linux-3.10.40.orig/fs/yaffs2/yaffs_vfs.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_vfs.c 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,3600 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ * Acknowledgements:
-+ * Luc van OostenRyck for numerous patches.
-+ * Nick Bane for numerous patches.
-+ * Nick Bane for 2.5/2.6 integration.
-+ * Andras Toth for mknod rdev issue.
-+ * Michael Fischer for finding the problem with inode inconsistency.
-+ * Some code bodily lifted from JFFS
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+/*
-+ *
-+ * This is the file system front-end to YAFFS that hooks it up to
-+ * the VFS.
-+ *
-+ * Special notes:
-+ * >> 2.4: sb->u.generic_sbp points to the struct yaffs_dev associated with
-+ * this superblock
-+ * >> 2.6: sb->s_fs_info points to the struct yaffs_dev associated with this
-+ * superblock
-+ * >> inode->u.generic_ip points to the associated struct yaffs_obj.
-+ */
-+
-+/*
-+ * There are two variants of the VFS glue code. This variant should compile
-+ * for any version of Linux.
-+ */
-+#include <linux/version.h>
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 10))
-+#define YAFFS_COMPILE_BACKGROUND
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23))
-+#define YAFFS_COMPILE_FREEZER
-+#endif
-+#endif
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28))
-+#define YAFFS_COMPILE_EXPORTFS
-+#endif
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 35))
-+#define YAFFS_USE_SETATTR_COPY
-+#define YAFFS_USE_TRUNCATE_SETSIZE
-+#endif
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 35))
-+#define YAFFS_HAS_EVICT_INODE
-+#endif
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
-+#define YAFFS_NEW_FOLLOW_LINK 1
-+#else
-+#define YAFFS_NEW_FOLLOW_LINK 0
-+#endif
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 6, 0))
-+#define YAFFS_HAS_WRITE_SUPER
-+#endif
-+
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
-+#include <linux/config.h>
-+#endif
-+
-+#include <linux/kernel.h>
-+#include <linux/module.h>
-+#include <linux/slab.h>
-+#include <linux/init.h>
-+#include <linux/fs.h>
-+#include <linux/proc_fs.h>
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 39))
-+#include <linux/smp_lock.h>
-+#endif
-+#include <linux/pagemap.h>
-+#include <linux/mtd/mtd.h>
-+#include <linux/interrupt.h>
-+#include <linux/string.h>
-+#include <linux/ctype.h>
-+
-+#if (YAFFS_NEW_FOLLOW_LINK == 1)
-+#include <linux/namei.h>
-+#endif
-+
-+#ifdef YAFFS_COMPILE_EXPORTFS
-+#include <linux/exportfs.h>
-+#endif
-+
-+#ifdef YAFFS_COMPILE_BACKGROUND
-+#include <linux/kthread.h>
-+#include <linux/delay.h>
-+#endif
-+#ifdef YAFFS_COMPILE_FREEZER
-+#include <linux/freezer.h>
-+#endif
-+
-+#include <asm/div64.h>
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+
-+#include <linux/statfs.h>
-+
-+#define UnlockPage(p) unlock_page(p)
-+#define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags)
-+
-+/* FIXME: use sb->s_id instead ? */
-+#define yaffs_devname(sb, buf) bdevname(sb->s_bdev, buf)
-+
-+#else
-+
-+#include <linux/locks.h>
-+#define BDEVNAME_SIZE 0
-+#define yaffs_devname(sb, buf) kdevname(sb->s_dev)
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0))
-+/* added NCB 26/5/2006 for 2.4.25-vrs2-tcl1 kernel */
-+#define __user
-+#endif
-+
-+#endif
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26))
-+#define YPROC_ROOT (&proc_root)
-+#else
-+#define YPROC_ROOT NULL
-+#endif
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26))
-+#define Y_INIT_TIMER(a) init_timer(a)
-+#else
-+#define Y_INIT_TIMER(a) init_timer_on_stack(a)
-+#endif
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 27))
-+#define YAFFS_USE_WRITE_BEGIN_END 1
-+#else
-+#define YAFFS_USE_WRITE_BEGIN_END 0
-+#endif
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 6, 0))
-+#define YAFFS_SUPER_HAS_DIRTY
-+#endif
-+
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 2, 0))
-+#define set_nlink(inode, count) do { (inode)->i_nlink = (count); } while(0)
-+#endif
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28))
-+static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size)
-+{
-+ uint64_t result = partition_size;
-+ do_div(result, block_size);
-+ return (uint32_t) result;
-+}
-+#else
-+#define YCALCBLOCKS(s, b) ((s)/(b))
-+#endif
-+
-+#include <linux/uaccess.h>
-+#include <linux/mtd/mtd.h>
-+
-+#include "yportenv.h"
-+#include "yaffs_trace.h"
-+#include "yaffs_guts.h"
-+#include "yaffs_attribs.h"
-+
-+#include "yaffs_linux.h"
-+
-+#include "yaffs_mtdif.h"
-+#include "yaffs_packedtags2.h"
-+#include "yaffs_getblockinfo.h"
-+
-+unsigned int yaffs_trace_mask =
-+ YAFFS_TRACE_BAD_BLOCKS |
-+ YAFFS_TRACE_ALWAYS |
-+ 0;
-+
-+unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS;
-+unsigned int yaffs_auto_checkpoint = 1;
-+unsigned int yaffs_gc_control = 1;
-+unsigned int yaffs_bg_enable = 1;
-+unsigned int yaffs_auto_select = 1;
-+/* Module Parameters */
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+module_param(yaffs_trace_mask, uint, 0644);
-+module_param(yaffs_wr_attempts, uint, 0644);
-+module_param(yaffs_auto_checkpoint, uint, 0644);
-+module_param(yaffs_gc_control, uint, 0644);
-+module_param(yaffs_bg_enable, uint, 0644);
-+#else
-+MODULE_PARM(yaffs_trace_mask, "i");
-+MODULE_PARM(yaffs_wr_attempts, "i");
-+MODULE_PARM(yaffs_auto_checkpoint, "i");
-+MODULE_PARM(yaffs_gc_control, "i");
-+#endif
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
-+/* use iget and read_inode */
-+#define Y_IGET(sb, inum) iget((sb), (inum))
-+
-+#else
-+/* Call local equivalent */
-+#define YAFFS_USE_OWN_IGET
-+#define Y_IGET(sb, inum) yaffs_iget((sb), (inum))
-+
-+#endif
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
-+#define yaffs_inode_to_obj_lv(iptr) ((iptr)->i_private)
-+#else
-+#define yaffs_inode_to_obj_lv(iptr) ((iptr)->u.generic_ip)
-+#endif
-+
-+#define yaffs_inode_to_obj(iptr) \
-+ ((struct yaffs_obj *)(yaffs_inode_to_obj_lv(iptr)))
-+#define yaffs_dentry_to_obj(dptr) yaffs_inode_to_obj((dptr)->d_inode)
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+#define yaffs_super_to_dev(sb) ((struct yaffs_dev *)sb->s_fs_info)
-+#else
-+#define yaffs_super_to_dev(sb) ((struct yaffs_dev *)sb->u.generic_sbp)
-+#endif
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0))
-+#define Y_CLEAR_INODE(i) clear_inode(i)
-+#else
-+#define Y_CLEAR_INODE(i) end_writeback(i)
-+#endif
-+
-+
-+#define update_dir_time(dir) do {\
-+ (dir)->i_ctime = (dir)->i_mtime = CURRENT_TIME; \
-+ } while (0)
-+
-+static void yaffs_fill_inode_from_obj(struct inode *inode,
-+ struct yaffs_obj *obj);
-+
-+
-+static void yaffs_gross_lock(struct yaffs_dev *dev)
-+{
-+ yaffs_trace(YAFFS_TRACE_LOCK, "yaffs locking %p", current);
-+ mutex_lock(&(yaffs_dev_to_lc(dev)->gross_lock));
-+ yaffs_trace(YAFFS_TRACE_LOCK, "yaffs locked %p", current);
-+}
-+
-+static void yaffs_gross_unlock(struct yaffs_dev *dev)
-+{
-+ yaffs_trace(YAFFS_TRACE_LOCK, "yaffs unlocking %p", current);
-+ mutex_unlock(&(yaffs_dev_to_lc(dev)->gross_lock));
-+}
-+
-+
-+static int yaffs_readpage_nolock(struct file *f, struct page *pg)
-+{
-+ /* Lifted from jffs2 */
-+
-+ struct yaffs_obj *obj;
-+ unsigned char *pg_buf;
-+ int ret;
-+ loff_t pos = ((loff_t) pg->index) << PAGE_CACHE_SHIFT;
-+ struct yaffs_dev *dev;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readpage_nolock at %lld, size %08x",
-+ (long long)pos,
-+ (unsigned)PAGE_CACHE_SIZE);
-+
-+ obj = yaffs_dentry_to_obj(f->f_dentry);
-+
-+ dev = obj->my_dev;
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+ BUG_ON(!PageLocked(pg));
-+#else
-+ if (!PageLocked(pg))
-+ PAGE_BUG(pg);
-+#endif
-+
-+ pg_buf = kmap(pg);
-+ /* FIXME: Can kmap fail? */
-+
-+ yaffs_gross_lock(dev);
-+
-+ ret = yaffs_file_rd(obj, pg_buf, pos, PAGE_CACHE_SIZE);
-+
-+ yaffs_gross_unlock(dev);
-+
-+ if (ret >= 0)
-+ ret = 0;
-+
-+ if (ret) {
-+ ClearPageUptodate(pg);
-+ SetPageError(pg);
-+ } else {
-+ SetPageUptodate(pg);
-+ ClearPageError(pg);
-+ }
-+
-+ flush_dcache_page(pg);
-+ kunmap(pg);
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage_nolock done");
-+ return ret;
-+}
-+
-+static int yaffs_readpage_unlock(struct file *f, struct page *pg)
-+{
-+ int ret = yaffs_readpage_nolock(f, pg);
-+ UnlockPage(pg);
-+ return ret;
-+}
-+
-+static int yaffs_readpage(struct file *f, struct page *pg)
-+{
-+ int ret;
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage");
-+ ret = yaffs_readpage_unlock(f, pg);
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage done");
-+ return ret;
-+}
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0))
-+#define YCRED_FSUID() from_kuid(&init_user_ns, current_fsuid())
-+#define YCRED_FSGID() from_kgid(&init_user_ns, current_fsgid())
-+#else
-+#define YCRED_FSUID() YCRED(current)->fsuid
-+#define YCRED_FSGID() YCRED(current)->fsgid
-+
-+static inline uid_t i_uid_read(const struct inode *inode)
-+{
-+ return inode->i_uid;
-+}
-+
-+static inline gid_t i_gid_read(const struct inode *inode)
-+{
-+ return inode->i_gid;
-+}
-+
-+static inline void i_uid_write(struct inode *inode, uid_t uid)
-+{
-+ inode->i_uid = uid;
-+}
-+
-+static inline void i_gid_write(struct inode *inode, gid_t gid)
-+{
-+ inode->i_gid = gid;
-+}
-+#endif
-+
-+static void yaffs_set_super_dirty_val(struct yaffs_dev *dev, int val)
-+{
-+ struct yaffs_linux_context *lc = yaffs_dev_to_lc(dev);
-+
-+ if (lc)
-+ lc->dirty = val;
-+
-+# ifdef YAFFS_SUPER_HAS_DIRTY
-+ {
-+ struct super_block *sb = lc->super;
-+
-+ if (sb)
-+ sb->s_dirt = val;
-+ }
-+#endif
-+
-+}
-+
-+static void yaffs_set_super_dirty(struct yaffs_dev *dev)
-+{
-+ yaffs_set_super_dirty_val(dev, 1);
-+}
-+
-+static void yaffs_clear_super_dirty(struct yaffs_dev *dev)
-+{
-+ yaffs_set_super_dirty_val(dev, 0);
-+}
-+
-+static int yaffs_check_super_dirty(struct yaffs_dev *dev)
-+{
-+ struct yaffs_linux_context *lc = yaffs_dev_to_lc(dev);
-+
-+ if (lc && lc->dirty)
-+ return 1;
-+
-+# ifdef YAFFS_SUPER_HAS_DIRTY
-+ {
-+ struct super_block *sb = lc->super;
-+
-+ if (sb && sb->s_dirt)
-+ return 1;
-+ }
-+#endif
-+ return 0;
-+
-+}
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
-+#else
-+static int yaffs_writepage(struct page *page)
-+#endif
-+{
-+ struct yaffs_dev *dev;
-+ struct address_space *mapping = page->mapping;
-+ struct inode *inode;
-+ unsigned long end_index;
-+ char *buffer;
-+ struct yaffs_obj *obj;
-+ int n_written = 0;
-+ unsigned n_bytes;
-+ loff_t i_size;
-+
-+ if (!mapping)
-+ BUG();
-+ inode = mapping->host;
-+ if (!inode)
-+ BUG();
-+ i_size = i_size_read(inode);
-+
-+ end_index = i_size >> PAGE_CACHE_SHIFT;
-+
-+ if (page->index < end_index)
-+ n_bytes = PAGE_CACHE_SIZE;
-+ else {
-+ n_bytes = i_size & (PAGE_CACHE_SIZE - 1);
-+
-+ if (page->index > end_index || !n_bytes) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_writepage at %lld, inode size = %lld!!",
-+ ((loff_t)page->index) << PAGE_CACHE_SHIFT,
-+ inode->i_size);
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ " -> don't care!!");
-+
-+ zero_user_segment(page, 0, PAGE_CACHE_SIZE);
-+ set_page_writeback(page);
-+ unlock_page(page);
-+ end_page_writeback(page);
-+ return 0;
-+ }
-+ }
-+
-+ if (n_bytes != PAGE_CACHE_SIZE)
-+ zero_user_segment(page, n_bytes, PAGE_CACHE_SIZE);
-+
-+ get_page(page);
-+
-+ buffer = kmap(page);
-+
-+ obj = yaffs_inode_to_obj(inode);
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_writepage at %lld, size %08x",
-+ ((loff_t)page->index) << PAGE_CACHE_SHIFT, n_bytes);
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "writepag0: obj = %lld, ino = %lld",
-+ obj->variant.file_variant.file_size, inode->i_size);
-+
-+ n_written = yaffs_wr_file(obj, buffer,
-+ ((loff_t)page->index) << PAGE_CACHE_SHIFT, n_bytes, 0);
-+
-+ yaffs_set_super_dirty(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "writepag1: obj = %lld, ino = %lld",
-+ obj->variant.file_variant.file_size, inode->i_size);
-+
-+ yaffs_gross_unlock(dev);
-+
-+ kunmap(page);
-+ set_page_writeback(page);
-+ unlock_page(page);
-+ end_page_writeback(page);
-+ put_page(page);
-+
-+ return (n_written == n_bytes) ? 0 : -ENOSPC;
-+}
-+
-+/* Space holding and freeing is done to ensure we have space available for write_begin/end */
-+/* For now we just assume few parallel writes and check against a small number. */
-+/* Todo: need to do this with a counter to handle parallel reads better */
-+
-+static ssize_t yaffs_hold_space(struct file *f)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev;
-+
-+ int n_free_chunks;
-+
-+ obj = yaffs_dentry_to_obj(f->f_dentry);
-+
-+ dev = obj->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ n_free_chunks = yaffs_get_n_free_chunks(dev);
-+
-+ yaffs_gross_unlock(dev);
-+
-+ return (n_free_chunks > 20) ? 1 : 0;
-+}
-+
-+static void yaffs_release_space(struct file *f)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev;
-+
-+ obj = yaffs_dentry_to_obj(f->f_dentry);
-+
-+ dev = obj->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ yaffs_gross_unlock(dev);
-+}
-+
-+#if (YAFFS_USE_WRITE_BEGIN_END > 0)
-+static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
-+ loff_t pos, unsigned len, unsigned flags,
-+ struct page **pagep, void **fsdata)
-+{
-+ struct page *pg = NULL;
-+ pgoff_t index = pos >> PAGE_CACHE_SHIFT;
-+
-+ int ret = 0;
-+ int space_held = 0;
-+
-+ /* Get a page */
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
-+ pg = grab_cache_page_write_begin(mapping, index, flags);
-+#else
-+ pg = __grab_cache_page(mapping, index);
-+#endif
-+
-+ *pagep = pg;
-+ if (!pg) {
-+ ret = -ENOMEM;
-+ goto out;
-+ }
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "start yaffs_write_begin index %d(%x) uptodate %d",
-+ (int)index, (int)index, Page_Uptodate(pg) ? 1 : 0);
-+
-+ /* Get fs space */
-+ space_held = yaffs_hold_space(filp);
-+
-+ if (!space_held) {
-+ ret = -ENOSPC;
-+ goto out;
-+ }
-+
-+ /* Update page if required */
-+
-+ if (!Page_Uptodate(pg))
-+ ret = yaffs_readpage_nolock(filp, pg);
-+
-+ if (ret)
-+ goto out;
-+
-+ /* Happy path return */
-+ yaffs_trace(YAFFS_TRACE_OS, "end yaffs_write_begin - ok");
-+
-+ return 0;
-+
-+out:
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "end yaffs_write_begin fail returning %d", ret);
-+ if (space_held)
-+ yaffs_release_space(filp);
-+ if (pg) {
-+ unlock_page(pg);
-+ page_cache_release(pg);
-+ }
-+ return ret;
-+}
-+
-+#else
-+
-+static int yaffs_prepare_write(struct file *f, struct page *pg,
-+ unsigned offset, unsigned to)
-+{
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_prepair_write");
-+
-+ if (!Page_Uptodate(pg))
-+ return yaffs_readpage_nolock(f, pg);
-+ return 0;
-+}
-+#endif
-+
-+
-+static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
-+ loff_t * pos)
-+{
-+ struct yaffs_obj *obj;
-+ int n_written;
-+ loff_t ipos;
-+ struct inode *inode;
-+ struct yaffs_dev *dev;
-+
-+ obj = yaffs_dentry_to_obj(f->f_dentry);
-+
-+ if (!obj) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_file_write: hey obj is null!");
-+ return -EINVAL;
-+ }
-+
-+ dev = obj->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ inode = f->f_dentry->d_inode;
-+
-+ if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND)
-+ ipos = inode->i_size;
-+ else
-+ ipos = *pos;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_file_write about to write writing %u(%x) bytes to object %d at %lld",
-+ (unsigned)n, (unsigned)n, obj->obj_id, ipos);
-+
-+ n_written = yaffs_wr_file(obj, buf, ipos, n, 0);
-+
-+ yaffs_set_super_dirty(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_file_write: %d(%x) bytes written",
-+ (unsigned)n, (unsigned)n);
-+
-+ if (n_written > 0) {
-+ ipos += n_written;
-+ *pos = ipos;
-+ if (ipos > inode->i_size) {
-+ inode->i_size = ipos;
-+ inode->i_blocks = (ipos + 511) >> 9;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_file_write size updated to %lld bytes, %d blocks",
-+ ipos, (int)(inode->i_blocks));
-+ }
-+
-+ }
-+ yaffs_gross_unlock(dev);
-+ return (n_written == 0) && (n > 0) ? -ENOSPC : n_written;
-+}
-+
-+
-+#if (YAFFS_USE_WRITE_BEGIN_END > 0)
-+static int yaffs_write_end(struct file *filp, struct address_space *mapping,
-+ loff_t pos, unsigned len, unsigned copied,
-+ struct page *pg, void *fsdadata)
-+{
-+ int ret = 0;
-+ void *addr, *kva;
-+ uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1);
-+
-+ kva = kmap(pg);
-+ addr = kva + offset_into_page;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_write_end addr %p pos %lld n_bytes %d",
-+ addr, pos, copied);
-+
-+ ret = yaffs_file_write(filp, addr, copied, &pos);
-+
-+ if (ret != copied) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_write_end not same size ret %d copied %d",
-+ ret, copied);
-+ SetPageError(pg);
-+ }
-+
-+ kunmap(pg);
-+
-+ yaffs_release_space(filp);
-+ unlock_page(pg);
-+ page_cache_release(pg);
-+ return ret;
-+}
-+#else
-+
-+static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
-+ unsigned to)
-+{
-+ void *addr, *kva;
-+
-+ loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset;
-+ int n_bytes = to - offset;
-+ int n_written;
-+
-+ kva = kmap(pg);
-+ addr = kva + offset;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_commit_write addr %p pos %lld n_bytes %d",
-+ addr, pos, n_bytes);
-+
-+ n_written = yaffs_file_write(f, addr, n_bytes, &pos);
-+
-+ if (n_written != n_bytes) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_commit_write not same size n_written %d n_bytes %d",
-+ n_written, n_bytes);
-+ SetPageError(pg);
-+ }
-+ kunmap(pg);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_commit_write returning %d",
-+ n_written == n_bytes ? 0 : n_written);
-+
-+ return n_written == n_bytes ? 0 : n_written;
-+}
-+#endif
-+
-+static struct address_space_operations yaffs_file_address_operations = {
-+ .readpage = yaffs_readpage,
-+ .writepage = yaffs_writepage,
-+#if (YAFFS_USE_WRITE_BEGIN_END > 0)
-+ .write_begin = yaffs_write_begin,
-+ .write_end = yaffs_write_end,
-+#else
-+ .prepare_write = yaffs_prepare_write,
-+ .commit_write = yaffs_commit_write,
-+#endif
-+};
-+
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-+static int yaffs_file_flush(struct file *file, fl_owner_t id)
-+#else
-+static int yaffs_file_flush(struct file *file)
-+#endif
-+{
-+ struct yaffs_obj *obj = yaffs_dentry_to_obj(file->f_dentry);
-+
-+ struct yaffs_dev *dev = obj->my_dev;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_file_flush object %d (%s)",
-+ obj->obj_id,
-+ obj->dirty ? "dirty" : "clean");
-+
-+ yaffs_gross_lock(dev);
-+
-+ yaffs_flush_file(obj, 1, 0);
-+
-+ yaffs_gross_unlock(dev);
-+
-+ return 0;
-+}
-+
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
-+static int yaffs_sync_object(struct file *file, loff_t start, loff_t end, int datasync)
-+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
-+static int yaffs_sync_object(struct file *file, int datasync)
-+#else
-+static int yaffs_sync_object(struct file *file, struct dentry *dentry,
-+ int datasync)
-+#endif
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev;
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
-+ struct dentry *dentry = file->f_path.dentry;
-+#endif
-+
-+ obj = yaffs_dentry_to_obj(dentry);
-+
-+ dev = obj->my_dev;
-+
-+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC,
-+ "yaffs_sync_object");
-+ yaffs_gross_lock(dev);
-+ yaffs_flush_file(obj, 1, datasync);
-+ yaffs_gross_unlock(dev);
-+ return 0;
-+}
-+
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 22))
-+static const struct file_operations yaffs_file_operations = {
-+ .read = do_sync_read,
-+ .write = do_sync_write,
-+ .aio_read = generic_file_aio_read,
-+ .aio_write = generic_file_aio_write,
-+ .mmap = generic_file_mmap,
-+ .flush = yaffs_file_flush,
-+ .fsync = yaffs_sync_object,
-+ .splice_read = generic_file_splice_read,
-+ .splice_write = generic_file_splice_write,
-+ .llseek = generic_file_llseek,
-+};
-+
-+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
-+
-+static const struct file_operations yaffs_file_operations = {
-+ .read = do_sync_read,
-+ .write = do_sync_write,
-+ .aio_read = generic_file_aio_read,
-+ .aio_write = generic_file_aio_write,
-+ .mmap = generic_file_mmap,
-+ .flush = yaffs_file_flush,
-+ .fsync = yaffs_sync_object,
-+ .sendfile = generic_file_sendfile,
-+};
-+
-+#else
-+
-+static const struct file_operations yaffs_file_operations = {
-+ .read = generic_file_read,
-+ .write = generic_file_write,
-+ .mmap = generic_file_mmap,
-+ .flush = yaffs_file_flush,
-+ .fsync = yaffs_sync_object,
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+ .sendfile = generic_file_sendfile,
-+#endif
-+};
-+#endif
-+
-+
-+
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
-+static void zero_user_segment(struct page *page, unsigned start, unsigned end)
-+{
-+ void *kaddr = kmap_atomic(page, KM_USER0);
-+ memset(kaddr + start, 0, end - start);
-+ kunmap_atomic(kaddr, KM_USER0);
-+ flush_dcache_page(page);
-+}
-+#endif
-+
-+
-+static int yaffs_vfs_setsize(struct inode *inode, loff_t newsize)
-+{
-+#ifdef YAFFS_USE_TRUNCATE_SETSIZE
-+ truncate_setsize(inode, newsize);
-+ return 0;
-+#else
-+ truncate_inode_pages(&inode->i_data, newsize);
-+ return 0;
-+#endif
-+
-+}
-+
-+
-+static int yaffs_vfs_setattr(struct inode *inode, struct iattr *attr)
-+{
-+#ifdef YAFFS_USE_SETATTR_COPY
-+ setattr_copy(inode, attr);
-+ return 0;
-+#else
-+ return inode_setattr(inode, attr);
-+#endif
-+
-+}
-+
-+static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
-+{
-+ struct inode *inode = dentry->d_inode;
-+ int error = 0;
-+ struct yaffs_dev *dev;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_setattr of object %d",
-+ yaffs_inode_to_obj(inode)->obj_id);
-+#if 0
-+ /* Fail if a requested resize >= 2GB */
-+ if (attr->ia_valid & ATTR_SIZE && (attr->ia_size >> 31))
-+ error = -EINVAL;
-+#endif
-+
-+ if (error == 0)
-+ error = inode_change_ok(inode, attr);
-+ if (error == 0) {
-+ int result;
-+ if (!error) {
-+ error = yaffs_vfs_setattr(inode, attr);
-+ yaffs_trace(YAFFS_TRACE_OS, "inode_setattr called");
-+ if (attr->ia_valid & ATTR_SIZE) {
-+ yaffs_vfs_setsize(inode, attr->ia_size);
-+ inode->i_blocks = (inode->i_size + 511) >> 9;
-+ }
-+ }
-+ dev = yaffs_inode_to_obj(inode)->my_dev;
-+ if (attr->ia_valid & ATTR_SIZE) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "resize to %d(%x)",
-+ (int)(attr->ia_size),
-+ (int)(attr->ia_size));
-+ }
-+ yaffs_gross_lock(dev);
-+ result = yaffs_set_attribs(yaffs_inode_to_obj(inode), attr);
-+ if (result == YAFFS_OK) {
-+ error = 0;
-+ } else {
-+ error = -EPERM;
-+ }
-+ yaffs_gross_unlock(dev);
-+
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_setattr done returning %d", error);
-+
-+ return error;
-+}
-+
-+static int yaffs_setxattr(struct dentry *dentry, const char *name,
-+ const void *value, size_t size, int flags)
-+{
-+ struct inode *inode = dentry->d_inode;
-+ int error = 0;
-+ struct yaffs_dev *dev;
-+ struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_setxattr of object %d", obj->obj_id);
-+
-+ if (error == 0) {
-+ int result;
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+ result = yaffs_set_xattrib(obj, name, value, size, flags);
-+ if (result == YAFFS_OK)
-+ error = 0;
-+ else if (result < 0)
-+ error = result;
-+ yaffs_gross_unlock(dev);
-+
-+ }
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_setxattr done returning %d", error);
-+
-+ return error;
-+}
-+
-+static ssize_t yaffs_getxattr(struct dentry * dentry, const char *name,
-+ void *buff, size_t size)
-+{
-+ struct inode *inode = dentry->d_inode;
-+ int error = 0;
-+ struct yaffs_dev *dev;
-+ struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_getxattr \"%s\" from object %d",
-+ name, obj->obj_id);
-+
-+ if (error == 0) {
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+ error = yaffs_get_xattrib(obj, name, buff, size);
-+ yaffs_gross_unlock(dev);
-+
-+ }
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_getxattr done returning %d", error);
-+
-+ return error;
-+}
-+
-+static int yaffs_removexattr(struct dentry *dentry, const char *name)
-+{
-+ struct inode *inode = dentry->d_inode;
-+ int error = 0;
-+ struct yaffs_dev *dev;
-+ struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_removexattr of object %d", obj->obj_id);
-+
-+ if (error == 0) {
-+ int result;
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+ result = yaffs_remove_xattrib(obj, name);
-+ if (result == YAFFS_OK)
-+ error = 0;
-+ else if (result < 0)
-+ error = result;
-+ yaffs_gross_unlock(dev);
-+
-+ }
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_removexattr done returning %d", error);
-+
-+ return error;
-+}
-+
-+static ssize_t yaffs_listxattr(struct dentry * dentry, char *buff, size_t size)
-+{
-+ struct inode *inode = dentry->d_inode;
-+ int error = 0;
-+ struct yaffs_dev *dev;
-+ struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_listxattr of object %d", obj->obj_id);
-+
-+ if (error == 0) {
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+ error = yaffs_list_xattrib(obj, buff, size);
-+ yaffs_gross_unlock(dev);
-+
-+ }
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_listxattr done returning %d", error);
-+
-+ return error;
-+}
-+
-+
-+static const struct inode_operations yaffs_file_inode_operations = {
-+ .setattr = yaffs_setattr,
-+ .setxattr = yaffs_setxattr,
-+ .getxattr = yaffs_getxattr,
-+ .listxattr = yaffs_listxattr,
-+ .removexattr = yaffs_removexattr,
-+};
-+
-+
-+static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
-+ int buflen)
-+{
-+ unsigned char *alias;
-+ int ret;
-+
-+ struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry));
-+
-+ yaffs_gross_unlock(dev);
-+
-+ if (!alias)
-+ return -ENOMEM;
-+
-+ ret = vfs_readlink(dentry, buffer, buflen, alias);
-+ kfree(alias);
-+ return ret;
-+}
-+
-+#if (YAFFS_NEW_FOLLOW_LINK == 1)
-+static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
-+{
-+ void *ret;
-+#else
-+static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
-+{
-+ int ret
-+#endif
-+ unsigned char *alias;
-+ int ret_int = 0;
-+ struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry));
-+ yaffs_gross_unlock(dev);
-+
-+ if (!alias) {
-+ ret_int = -ENOMEM;
-+ goto out;
-+ }
-+#if (YAFFS_NEW_FOLLOW_LINK == 1)
-+ nd_set_link(nd, alias);
-+ ret = alias;
-+out:
-+ if (ret_int)
-+ ret = ERR_PTR(ret_int);
-+ return ret;
-+#else
-+ ret = vfs_follow_link(nd, alias);
-+ kfree(alias);
-+out:
-+ if (ret_int)
-+ ret = ret_int;
-+ return ret;
-+#endif
-+}
-+
-+
-+#ifdef YAFFS_HAS_PUT_INODE
-+
-+/* For now put inode is just for debugging
-+ * Put inode is called when the inode **structure** is put.
-+ */
-+static void yaffs_put_inode(struct inode *inode)
-+{
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_put_inode: ino %d, count %d"),
-+ (int)inode->i_ino, atomic_read(&inode->i_count);
-+
-+}
-+#endif
-+
-+#if (YAFFS_NEW_FOLLOW_LINK == 1)
-+void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias)
-+{
-+ kfree(alias);
-+}
-+#endif
-+
-+static const struct inode_operations yaffs_symlink_inode_operations = {
-+ .readlink = yaffs_readlink,
-+ .follow_link = yaffs_follow_link,
-+#if (YAFFS_NEW_FOLLOW_LINK == 1)
-+ .put_link = yaffs_put_link,
-+#endif
-+ .setattr = yaffs_setattr,
-+ .setxattr = yaffs_setxattr,
-+ .getxattr = yaffs_getxattr,
-+ .listxattr = yaffs_listxattr,
-+ .removexattr = yaffs_removexattr,
-+};
-+
-+#ifdef YAFFS_USE_OWN_IGET
-+
-+static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino)
-+{
-+ struct inode *inode;
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_iget for %lu", ino);
-+
-+ inode = iget_locked(sb, ino);
-+ if (!inode)
-+ return ERR_PTR(-ENOMEM);
-+ if (!(inode->i_state & I_NEW))
-+ return inode;
-+
-+ /* NB This is called as a side effect of other functions, but
-+ * we had to release the lock to prevent deadlocks, so
-+ * need to lock again.
-+ */
-+
-+ yaffs_gross_lock(dev);
-+
-+ obj = yaffs_find_by_number(dev, inode->i_ino);
-+
-+ yaffs_fill_inode_from_obj(inode, obj);
-+
-+ yaffs_gross_unlock(dev);
-+
-+ unlock_new_inode(inode);
-+ return inode;
-+}
-+
-+#else
-+
-+static void yaffs_read_inode(struct inode *inode)
-+{
-+ /* NB This is called as a side effect of other functions, but
-+ * we had to release the lock to prevent deadlocks, so
-+ * need to lock again.
-+ */
-+
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev = yaffs_super_to_dev(inode->i_sb);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_read_inode for %d", (int)inode->i_ino);
-+
-+ if (current != yaffs_dev_to_lc(dev)->readdir_process)
-+ yaffs_gross_lock(dev);
-+
-+ obj = yaffs_find_by_number(dev, inode->i_ino);
-+
-+ yaffs_fill_inode_from_obj(inode, obj);
-+
-+ if (current != yaffs_dev_to_lc(dev)->readdir_process)
-+ yaffs_gross_unlock(dev);
-+}
-+
-+#endif
-+
-+
-+
-+struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
-+ struct yaffs_obj *obj)
-+{
-+ struct inode *inode;
-+
-+ if (!sb) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_get_inode for NULL super_block!!");
-+ return NULL;
-+
-+ }
-+
-+ if (!obj) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_get_inode for NULL object!!");
-+ return NULL;
-+
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_get_inode for object %d", obj->obj_id);
-+
-+ inode = Y_IGET(sb, obj->obj_id);
-+ if (IS_ERR(inode))
-+ return NULL;
-+
-+ /* NB Side effect: iget calls back to yaffs_read_inode(). */
-+ /* iget also increments the inode's i_count */
-+ /* NB You can't be holding gross_lock or deadlock will happen! */
-+
-+ return inode;
-+}
-+
-+
-+
-+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
-+#define YCRED(x) x
-+#else
-+#define YCRED(x) (x->cred)
-+#endif
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 4, 0))
-+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
-+ dev_t rdev)
-+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
-+ dev_t rdev)
-+#else
-+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
-+ int rdev)
-+#endif
-+{
-+ struct inode *inode;
-+
-+ struct yaffs_obj *obj = NULL;
-+ struct yaffs_dev *dev;
-+
-+ struct yaffs_obj *parent = yaffs_inode_to_obj(dir);
-+
-+ int error = -ENOSPC;
-+ uid_t uid = YCRED_FSUID();
-+ gid_t gid =
-+ (dir->i_mode & S_ISGID) ? i_gid_read(dir) : YCRED_FSGID();
-+
-+ if ((dir->i_mode & S_ISGID) && S_ISDIR(mode))
-+ mode |= S_ISGID;
-+
-+ if (parent) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_mknod: parent object %d type %d",
-+ parent->obj_id, parent->variant_type);
-+ } else {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_mknod: could not get parent object");
-+ return -EPERM;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_mknod: making oject for %s, mode %x dev %x",
-+ dentry->d_name.name, mode, rdev);
-+
-+ dev = parent->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ switch (mode & S_IFMT) {
-+ default:
-+ /* Special (socket, fifo, device...) */
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making special");
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+ obj =
-+ yaffs_create_special(parent, dentry->d_name.name, mode, uid,
-+ gid, old_encode_dev(rdev));
-+#else
-+ obj =
-+ yaffs_create_special(parent, dentry->d_name.name, mode, uid,
-+ gid, rdev);
-+#endif
-+ break;
-+ case S_IFREG: /* file */
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making file");
-+ obj = yaffs_create_file(parent, dentry->d_name.name, mode, uid,
-+ gid);
-+ break;
-+ case S_IFDIR: /* directory */
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making directory");
-+ obj = yaffs_create_dir(parent, dentry->d_name.name, mode,
-+ uid, gid);
-+ break;
-+ case S_IFLNK: /* symlink */
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making symlink");
-+ obj = NULL; /* Do we ever get here? */
-+ break;
-+ }
-+
-+ /* Can not call yaffs_get_inode() with gross lock held */
-+ yaffs_gross_unlock(dev);
-+
-+ if (obj) {
-+ inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
-+ d_instantiate(dentry, inode);
-+ update_dir_time(dir);
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_mknod created object %d count = %d",
-+ obj->obj_id, atomic_read(&inode->i_count));
-+ error = 0;
-+ yaffs_fill_inode_from_obj(dir, parent);
-+ } else {
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod failed making object");
-+ error = -ENOMEM;
-+ }
-+
-+ return error;
-+}
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 4, 0))
-+static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
-+#else
-+static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
-+#endif
-+{
-+ int ret_val;
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_mkdir");
-+ ret_val = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
-+ return ret_val;
-+}
-+
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 6, 0))
-+static int yaffs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-+ bool dummy)
-+#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 4, 0))
-+static int yaffs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-+ struct nameidata *n)
-+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
-+ struct nameidata *n)
-+#else
-+static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode)
-+#endif
-+{
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_create");
-+ return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
-+}
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 6, 0))
-+static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
-+ unsigned int dummy)
-+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
-+ struct nameidata *n)
-+#else
-+static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
-+#endif
-+{
-+ struct yaffs_obj *obj;
-+ struct inode *inode = NULL; /* NCB 2.5/2.6 needs NULL here */
-+
-+ struct yaffs_dev *dev = yaffs_inode_to_obj(dir)->my_dev;
-+
-+ if (current != yaffs_dev_to_lc(dev)->readdir_process)
-+ yaffs_gross_lock(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_lookup for %d:%s",
-+ yaffs_inode_to_obj(dir)->obj_id, dentry->d_name.name);
-+
-+ obj = yaffs_find_by_name(yaffs_inode_to_obj(dir), dentry->d_name.name);
-+
-+ obj = yaffs_get_equivalent_obj(obj); /* in case it was a hardlink */
-+
-+ /* Can't hold gross lock when calling yaffs_get_inode() */
-+ if (current != yaffs_dev_to_lc(dev)->readdir_process)
-+ yaffs_gross_unlock(dev);
-+
-+ if (obj) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_lookup found %d", obj->obj_id);
-+
-+ inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
-+ } else {
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_lookup not found");
-+
-+ }
-+
-+/* added NCB for 2.5/6 compatability - forces add even if inode is
-+ * NULL which creates dentry hash */
-+ d_add(dentry, inode);
-+
-+ return NULL;
-+}
-+
-+/*
-+ * Create a link...
-+ */
-+static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
-+ struct dentry *dentry)
-+{
-+ struct inode *inode = old_dentry->d_inode;
-+ struct yaffs_obj *obj = NULL;
-+ struct yaffs_obj *link = NULL;
-+ struct yaffs_dev *dev;
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_link");
-+
-+ obj = yaffs_inode_to_obj(inode);
-+ dev = obj->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ if (!S_ISDIR(inode->i_mode)) /* Don't link directories */
-+ link =
-+ yaffs_link_obj(yaffs_inode_to_obj(dir), dentry->d_name.name,
-+ obj);
-+
-+ if (link) {
-+ set_nlink(old_dentry->d_inode, yaffs_get_obj_link_count(obj));
-+ d_instantiate(dentry, old_dentry->d_inode);
-+ atomic_inc(&old_dentry->d_inode->i_count);
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_link link count %d i_count %d",
-+ old_dentry->d_inode->i_nlink,
-+ atomic_read(&old_dentry->d_inode->i_count));
-+ }
-+
-+ yaffs_gross_unlock(dev);
-+
-+ if (link) {
-+ update_dir_time(dir);
-+ return 0;
-+ }
-+
-+ return -EPERM;
-+}
-+
-+static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
-+ const char *symname)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev;
-+ uid_t uid = YCRED_FSUID();
-+ gid_t gid =
-+ (dir->i_mode & S_ISGID) ? i_gid_read(dir) : YCRED_FSGID();
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_symlink");
-+
-+ if (strnlen(dentry->d_name.name, YAFFS_MAX_NAME_LENGTH + 1) >
-+ YAFFS_MAX_NAME_LENGTH)
-+ return -ENAMETOOLONG;
-+
-+ if (strnlen(symname, YAFFS_MAX_ALIAS_LENGTH + 1) >
-+ YAFFS_MAX_ALIAS_LENGTH)
-+ return -ENAMETOOLONG;
-+
-+ dev = yaffs_inode_to_obj(dir)->my_dev;
-+ yaffs_gross_lock(dev);
-+ obj = yaffs_create_symlink(yaffs_inode_to_obj(dir), dentry->d_name.name,
-+ S_IFLNK | S_IRWXUGO, uid, gid, symname);
-+ yaffs_gross_unlock(dev);
-+
-+ if (obj) {
-+ struct inode *inode;
-+
-+ inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
-+ d_instantiate(dentry, inode);
-+ update_dir_time(dir);
-+ yaffs_trace(YAFFS_TRACE_OS, "symlink created OK");
-+ return 0;
-+ } else {
-+ yaffs_trace(YAFFS_TRACE_OS, "symlink not created");
-+ }
-+
-+ return -ENOMEM;
-+}
-+
-+/*
-+ * The VFS layer already does all the dentry stuff for rename.
-+ *
-+ * NB: POSIX says you can rename an object over an old object of the same name
-+ */
-+static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
-+ struct inode *new_dir, struct dentry *new_dentry)
-+{
-+ struct yaffs_dev *dev;
-+ int ret_val = YAFFS_FAIL;
-+ struct yaffs_obj *target;
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_rename");
-+ dev = yaffs_inode_to_obj(old_dir)->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ /* Check if the target is an existing directory that is not empty. */
-+ target = yaffs_find_by_name(yaffs_inode_to_obj(new_dir),
-+ new_dentry->d_name.name);
-+
-+ if (target && target->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY &&
-+ !list_empty(&target->variant.dir_variant.children)) {
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "target is non-empty dir");
-+
-+ ret_val = YAFFS_FAIL;
-+ } else {
-+ /* Now does unlinking internally using shadowing mechanism */
-+ yaffs_trace(YAFFS_TRACE_OS, "calling yaffs_rename_obj");
-+
-+ ret_val = yaffs_rename_obj(yaffs_inode_to_obj(old_dir),
-+ old_dentry->d_name.name,
-+ yaffs_inode_to_obj(new_dir),
-+ new_dentry->d_name.name);
-+ }
-+ yaffs_gross_unlock(dev);
-+
-+ if (ret_val == YAFFS_OK) {
-+ if (target)
-+ inode_dec_link_count(new_dentry->d_inode);
-+
-+ update_dir_time(old_dir);
-+ if (old_dir != new_dir)
-+ update_dir_time(new_dir);
-+ return 0;
-+ } else {
-+ return -ENOTEMPTY;
-+ }
-+}
-+
-+
-+
-+
-+static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
-+{
-+ int ret_val;
-+
-+ struct yaffs_dev *dev;
-+ struct yaffs_obj *obj;
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_unlink %d:%s",
-+ (int)(dir->i_ino), dentry->d_name.name);
-+ obj = yaffs_inode_to_obj(dir);
-+ dev = obj->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ ret_val = yaffs_unlinker(obj, dentry->d_name.name);
-+
-+ if (ret_val == YAFFS_OK) {
-+ inode_dec_link_count(dentry->d_inode);
-+ dir->i_version++;
-+ yaffs_gross_unlock(dev);
-+ update_dir_time(dir);
-+ return 0;
-+ }
-+ yaffs_gross_unlock(dev);
-+ return -ENOTEMPTY;
-+}
-+
-+
-+
-+static const struct inode_operations yaffs_dir_inode_operations = {
-+ .create = yaffs_create,
-+ .lookup = yaffs_lookup,
-+ .link = yaffs_link,
-+ .unlink = yaffs_unlink,
-+ .symlink = yaffs_symlink,
-+ .mkdir = yaffs_mkdir,
-+ .rmdir = yaffs_unlink,
-+ .mknod = yaffs_mknod,
-+ .rename = yaffs_rename,
-+ .setattr = yaffs_setattr,
-+ .setxattr = yaffs_setxattr,
-+ .getxattr = yaffs_getxattr,
-+ .listxattr = yaffs_listxattr,
-+ .removexattr = yaffs_removexattr,
-+};
-+
-+/*-----------------------------------------------------------------*/
-+/* Directory search context allows us to unlock access to yaffs during
-+ * filldir without causing problems with the directory being modified.
-+ * This is similar to the tried and tested mechanism used in yaffs direct.
-+ *
-+ * A search context iterates along a doubly linked list of siblings in the
-+ * directory. If the iterating object is deleted then this would corrupt
-+ * the list iteration, likely causing a crash. The search context avoids
-+ * this by using the remove_obj_fn to move the search context to the
-+ * next object before the object is deleted.
-+ *
-+ * Many readdirs (and thus seach conexts) may be alive simulateously so
-+ * each struct yaffs_dev has a list of these.
-+ *
-+ * A seach context lives for the duration of a readdir.
-+ *
-+ * All these functions must be called while yaffs is locked.
-+ */
-+
-+struct yaffs_search_context {
-+ struct yaffs_dev *dev;
-+ struct yaffs_obj *dir_obj;
-+ struct yaffs_obj *next_return;
-+ struct list_head others;
-+};
-+
-+/*
-+ * yaffs_new_search() creates a new search context, initialises it and
-+ * adds it to the device's search context list.
-+ *
-+ * Called at start of readdir.
-+ */
-+static struct yaffs_search_context *yaffs_new_search(struct yaffs_obj *dir)
-+{
-+ struct yaffs_dev *dev = dir->my_dev;
-+ struct yaffs_search_context *sc =
-+ kmalloc(sizeof(struct yaffs_search_context), GFP_NOFS);
-+ if (sc) {
-+ sc->dir_obj = dir;
-+ sc->dev = dev;
-+ if (list_empty(&sc->dir_obj->variant.dir_variant.children))
-+ sc->next_return = NULL;
-+ else
-+ sc->next_return =
-+ list_entry(dir->variant.dir_variant.children.next,
-+ struct yaffs_obj, siblings);
-+ INIT_LIST_HEAD(&sc->others);
-+ list_add(&sc->others, &(yaffs_dev_to_lc(dev)->search_contexts));
-+ }
-+ return sc;
-+}
-+
-+/*
-+ * yaffs_search_end() disposes of a search context and cleans up.
-+ */
-+static void yaffs_search_end(struct yaffs_search_context *sc)
-+{
-+ if (sc) {
-+ list_del(&sc->others);
-+ kfree(sc);
-+ }
-+}
-+
-+/*
-+ * yaffs_search_advance() moves a search context to the next object.
-+ * Called when the search iterates or when an object removal causes
-+ * the search context to be moved to the next object.
-+ */
-+static void yaffs_search_advance(struct yaffs_search_context *sc)
-+{
-+ if (!sc)
-+ return;
-+
-+ if (sc->next_return == NULL ||
-+ list_empty(&sc->dir_obj->variant.dir_variant.children))
-+ sc->next_return = NULL;
-+ else {
-+ struct list_head *next = sc->next_return->siblings.next;
-+
-+ if (next == &sc->dir_obj->variant.dir_variant.children)
-+ sc->next_return = NULL; /* end of list */
-+ else
-+ sc->next_return =
-+ list_entry(next, struct yaffs_obj, siblings);
-+ }
-+}
-+
-+/*
-+ * yaffs_remove_obj_callback() is called when an object is unlinked.
-+ * We check open search contexts and advance any which are currently
-+ * on the object being iterated.
-+ */
-+static void yaffs_remove_obj_callback(struct yaffs_obj *obj)
-+{
-+
-+ struct list_head *i;
-+ struct yaffs_search_context *sc;
-+ struct list_head *search_contexts =
-+ &(yaffs_dev_to_lc(obj->my_dev)->search_contexts);
-+
-+ /* Iterate through the directory search contexts.
-+ * If any are currently on the object being removed, then advance
-+ * the search context to the next object to prevent a hanging pointer.
-+ */
-+ list_for_each(i, search_contexts) {
-+ sc = list_entry(i, struct yaffs_search_context, others);
-+ if (sc->next_return == obj)
-+ yaffs_search_advance(sc);
-+ }
-+
-+}
-+
-+
-+/*-----------------------------------------------------------------*/
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 12, 0))
-+static int yaffs_readdir(struct file *file, struct dir_context *ctx)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev;
-+ struct yaffs_search_context *sc;
-+ struct inode *inode = file->f_dentry->d_inode;
-+ unsigned long offset, curoffs;
-+ struct yaffs_obj *l;
-+ int ret_val = 0;
-+
-+ char name[YAFFS_MAX_NAME_LENGTH + 1];
-+
-+ obj = yaffs_dentry_to_obj(file->f_dentry);
-+ dev = obj->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ yaffs_dev_to_lc(dev)->readdir_process = current;
-+
-+ offset = ctx->pos;
-+
-+ sc = yaffs_new_search(obj);
-+ if (!sc) {
-+ ret_val = -ENOMEM;
-+ goto out;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readdir: starting at %d", (int)offset);
-+
-+ if (offset == 0) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readdir: entry . ino %d",
-+ (int)inode->i_ino);
-+ yaffs_gross_unlock(dev);
-+ if (!dir_emit_dot(file, ctx)) {
-+ yaffs_gross_lock(dev);
-+ goto out;
-+ }
-+ yaffs_gross_lock(dev);
-+ offset++;
-+ ctx->pos++;
-+ }
-+ if (offset == 1) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readdir: entry .. ino %d",
-+ (int)file->f_dentry->d_parent->d_inode->i_ino);
-+ yaffs_gross_unlock(dev);
-+ if (!dir_emit_dotdot(file, ctx)) {
-+ yaffs_gross_lock(dev);
-+ goto out;
-+ }
-+ yaffs_gross_lock(dev);
-+ offset++;
-+ ctx->pos++;
-+ }
-+
-+ curoffs = 1;
-+
-+ /* If the directory has changed since the open or last call to
-+ readdir, rewind to after the 2 canned entries. */
-+ if (file->f_version != inode->i_version) {
-+ offset = 2;
-+ ctx->pos = offset;
-+ file->f_version = inode->i_version;
-+ }
-+
-+ while (sc->next_return) {
-+ curoffs++;
-+ l = sc->next_return;
-+ if (curoffs >= offset) {
-+ int this_inode = yaffs_get_obj_inode(l);
-+ int this_type = yaffs_get_obj_type(l);
-+
-+ yaffs_get_obj_name(l, name, YAFFS_MAX_NAME_LENGTH + 1);
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readdir: %s inode %d",
-+ name, yaffs_get_obj_inode(l));
-+
-+ yaffs_gross_unlock(dev);
-+
-+ if (!dir_emit(ctx, name, strlen(name),
-+ this_inode, this_type) < 0) {
-+ yaffs_gross_lock(dev);
-+ goto out;
-+ }
-+
-+ yaffs_gross_lock(dev);
-+
-+ offset++;
-+ ctx->pos++;
-+ }
-+ yaffs_search_advance(sc);
-+ }
-+
-+out:
-+ yaffs_search_end(sc);
-+ yaffs_dev_to_lc(dev)->readdir_process = NULL;
-+ yaffs_gross_unlock(dev);
-+
-+ return ret_val;
-+}
-+#else
-+static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev;
-+ struct yaffs_search_context *sc;
-+ struct inode *inode = f->f_dentry->d_inode;
-+ unsigned long offset, curoffs;
-+ struct yaffs_obj *l;
-+ int ret_val = 0;
-+
-+ char name[YAFFS_MAX_NAME_LENGTH + 1];
-+
-+ obj = yaffs_dentry_to_obj(f->f_dentry);
-+ dev = obj->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ yaffs_dev_to_lc(dev)->readdir_process = current;
-+
-+ offset = f->f_pos;
-+
-+ sc = yaffs_new_search(obj);
-+ if (!sc) {
-+ ret_val = -ENOMEM;
-+ goto out;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readdir: starting at %d", (int)offset);
-+
-+ if (offset == 0) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readdir: entry . ino %d",
-+ (int)inode->i_ino);
-+ yaffs_gross_unlock(dev);
-+ if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR) < 0) {
-+ yaffs_gross_lock(dev);
-+ goto out;
-+ }
-+ yaffs_gross_lock(dev);
-+ offset++;
-+ f->f_pos++;
-+ }
-+ if (offset == 1) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readdir: entry .. ino %d",
-+ (int)f->f_dentry->d_parent->d_inode->i_ino);
-+ yaffs_gross_unlock(dev);
-+ if (filldir(dirent, "..", 2, offset,
-+ f->f_dentry->d_parent->d_inode->i_ino,
-+ DT_DIR) < 0) {
-+ yaffs_gross_lock(dev);
-+ goto out;
-+ }
-+ yaffs_gross_lock(dev);
-+ offset++;
-+ f->f_pos++;
-+ }
-+
-+ curoffs = 1;
-+
-+ /* If the directory has changed since the open or last call to
-+ readdir, rewind to after the 2 canned entries. */
-+ if (f->f_version != inode->i_version) {
-+ offset = 2;
-+ f->f_pos = offset;
-+ f->f_version = inode->i_version;
-+ }
-+
-+ while (sc->next_return) {
-+ curoffs++;
-+ l = sc->next_return;
-+ if (curoffs >= offset) {
-+ int this_inode = yaffs_get_obj_inode(l);
-+ int this_type = yaffs_get_obj_type(l);
-+
-+ yaffs_get_obj_name(l, name, YAFFS_MAX_NAME_LENGTH + 1);
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readdir: %s inode %d",
-+ name, yaffs_get_obj_inode(l));
-+
-+ yaffs_gross_unlock(dev);
-+
-+ if (filldir(dirent,
-+ name,
-+ strlen(name),
-+ offset, this_inode, this_type) < 0) {
-+ yaffs_gross_lock(dev);
-+ goto out;
-+ }
-+
-+ yaffs_gross_lock(dev);
-+
-+ offset++;
-+ f->f_pos++;
-+ }
-+ yaffs_search_advance(sc);
-+ }
-+
-+out:
-+ yaffs_search_end(sc);
-+ yaffs_dev_to_lc(dev)->readdir_process = NULL;
-+ yaffs_gross_unlock(dev);
-+
-+ return ret_val;
-+}
-+#endif
-+
-+static const struct file_operations yaffs_dir_operations = {
-+ .read = generic_read_dir,
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 12, 0))
-+ .iterate = yaffs_readdir,
-+#else
-+ .readdir = yaffs_readdir,
-+#endif
-+ .fsync = yaffs_sync_object,
-+ .llseek = generic_file_llseek,
-+};
-+
-+static void yaffs_fill_inode_from_obj(struct inode *inode,
-+ struct yaffs_obj *obj)
-+{
-+ if (inode && obj) {
-+
-+ /* Check mode against the variant type and attempt to repair if broken. */
-+ u32 mode = obj->yst_mode;
-+ switch (obj->variant_type) {
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ if (!S_ISREG(mode)) {
-+ obj->yst_mode &= ~S_IFMT;
-+ obj->yst_mode |= S_IFREG;
-+ }
-+
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ if (!S_ISLNK(mode)) {
-+ obj->yst_mode &= ~S_IFMT;
-+ obj->yst_mode |= S_IFLNK;
-+ }
-+
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ if (!S_ISDIR(mode)) {
-+ obj->yst_mode &= ~S_IFMT;
-+ obj->yst_mode |= S_IFDIR;
-+ }
-+
-+ break;
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ default:
-+ /* TODO? */
-+ break;
-+ }
-+
-+ inode->i_flags |= S_NOATIME;
-+
-+ inode->i_ino = obj->obj_id;
-+ inode->i_mode = obj->yst_mode;
-+ i_uid_write(inode, obj->yst_uid);
-+ i_gid_write(inode, obj->yst_gid);
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
-+ inode->i_blksize = inode->i_sb->s_blocksize;
-+#endif
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+
-+ inode->i_rdev = old_decode_dev(obj->yst_rdev);
-+ inode->i_atime.tv_sec = (time_t) (obj->yst_atime);
-+ inode->i_atime.tv_nsec = 0;
-+ inode->i_mtime.tv_sec = (time_t) obj->yst_mtime;
-+ inode->i_mtime.tv_nsec = 0;
-+ inode->i_ctime.tv_sec = (time_t) obj->yst_ctime;
-+ inode->i_ctime.tv_nsec = 0;
-+#else
-+ inode->i_rdev = obj->yst_rdev;
-+ inode->i_atime = obj->yst_atime;
-+ inode->i_mtime = obj->yst_mtime;
-+ inode->i_ctime = obj->yst_ctime;
-+#endif
-+ inode->i_size = yaffs_get_obj_length(obj);
-+ inode->i_blocks = (inode->i_size + 511) >> 9;
-+
-+ set_nlink(inode, yaffs_get_obj_link_count(obj));
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_fill_inode mode %x uid %d gid %d size %lld count %d",
-+ inode->i_mode, i_uid_read(inode), i_gid_read(inode),
-+ inode->i_size, atomic_read(&inode->i_count));
-+
-+ switch (obj->yst_mode & S_IFMT) {
-+ default: /* fifo, device or socket */
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+ init_special_inode(inode, obj->yst_mode,
-+ old_decode_dev(obj->yst_rdev));
-+#else
-+ init_special_inode(inode, obj->yst_mode,
-+ (dev_t) (obj->yst_rdev));
-+#endif
-+ break;
-+ case S_IFREG: /* file */
-+ inode->i_op = &yaffs_file_inode_operations;
-+ inode->i_fop = &yaffs_file_operations;
-+ inode->i_mapping->a_ops =
-+ &yaffs_file_address_operations;
-+ break;
-+ case S_IFDIR: /* directory */
-+ inode->i_op = &yaffs_dir_inode_operations;
-+ inode->i_fop = &yaffs_dir_operations;
-+ break;
-+ case S_IFLNK: /* symlink */
-+ inode->i_op = &yaffs_symlink_inode_operations;
-+ break;
-+ }
-+
-+ yaffs_inode_to_obj_lv(inode) = obj;
-+
-+ obj->my_inode = inode;
-+
-+ } else {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_fill_inode invalid parameters");
-+ }
-+
-+}
-+
-+
-+
-+/*
-+ * yaffs background thread functions .
-+ * yaffs_bg_thread_fn() the thread function
-+ * yaffs_bg_start() launches the background thread.
-+ * yaffs_bg_stop() cleans up the background thread.
-+ *
-+ * NB:
-+ * The thread should only run after the yaffs is initialised
-+ * The thread should be stopped before yaffs is unmounted.
-+ * The thread should not do any writing while the fs is in read only.
-+ */
-+
-+static unsigned yaffs_bg_gc_urgency(struct yaffs_dev *dev)
-+{
-+ unsigned erased_chunks =
-+ dev->n_erased_blocks * dev->param.chunks_per_block;
-+ struct yaffs_linux_context *context = yaffs_dev_to_lc(dev);
-+ unsigned scattered = 0; /* Free chunks not in an erased block */
-+
-+ if (erased_chunks < dev->n_free_chunks)
-+ scattered = (dev->n_free_chunks - erased_chunks);
-+
-+ if (!context->bg_running)
-+ return 0;
-+ else if (scattered < (dev->param.chunks_per_block * 2))
-+ return 0;
-+ else if (erased_chunks > dev->n_free_chunks / 2)
-+ return 0;
-+ else if (erased_chunks > dev->n_free_chunks / 4)
-+ return 1;
-+ else
-+ return 2;
-+}
-+
-+#ifdef YAFFS_COMPILE_BACKGROUND
-+
-+void yaffs_background_waker(unsigned long data)
-+{
-+ wake_up_process((struct task_struct *)data);
-+}
-+
-+static int yaffs_bg_thread_fn(void *data)
-+{
-+ struct yaffs_dev *dev = (struct yaffs_dev *)data;
-+ struct yaffs_linux_context *context = yaffs_dev_to_lc(dev);
-+ unsigned long now = jiffies;
-+ unsigned long next_dir_update = now;
-+ unsigned long next_gc = now;
-+ unsigned long expires;
-+ unsigned int urgency;
-+
-+ int gc_result;
-+ struct timer_list timer;
-+
-+ yaffs_trace(YAFFS_TRACE_BACKGROUND,
-+ "yaffs_background starting for dev %p", (void *)dev);
-+
-+#ifdef YAFFS_COMPILE_FREEZER
-+ set_freezable();
-+#endif
-+ while (context->bg_running) {
-+ yaffs_trace(YAFFS_TRACE_BACKGROUND, "yaffs_background");
-+
-+ if (kthread_should_stop())
-+ break;
-+
-+#ifdef YAFFS_COMPILE_FREEZER
-+ if (try_to_freeze())
-+ continue;
-+#endif
-+ yaffs_gross_lock(dev);
-+
-+ now = jiffies;
-+
-+ if (time_after(now, next_dir_update) && yaffs_bg_enable) {
-+ yaffs_update_dirty_dirs(dev);
-+ next_dir_update = now + HZ;
-+ }
-+
-+ if (time_after(now, next_gc) && yaffs_bg_enable) {
-+ if (!dev->is_checkpointed) {
-+ urgency = yaffs_bg_gc_urgency(dev);
-+ gc_result = yaffs_bg_gc(dev, urgency);
-+ if (urgency > 1)
-+ next_gc = now + HZ / 20 + 1;
-+ else if (urgency > 0)
-+ next_gc = now + HZ / 10 + 1;
-+ else
-+ next_gc = now + HZ * 2;
-+ } else {
-+ /*
-+ * gc not running so set to next_dir_update
-+ * to cut down on wake ups
-+ */
-+ next_gc = next_dir_update;
-+ }
-+ }
-+ yaffs_gross_unlock(dev);
-+#if 1
-+ expires = next_dir_update;
-+ if (time_before(next_gc, expires))
-+ expires = next_gc;
-+ if (time_before(expires, now))
-+ expires = now + HZ;
-+
-+ Y_INIT_TIMER(&timer);
-+ timer.expires = expires + 1;
-+ timer.data = (unsigned long)current;
-+ timer.function = yaffs_background_waker;
-+
-+ set_current_state(TASK_INTERRUPTIBLE);
-+ add_timer(&timer);
-+ schedule();
-+ del_timer_sync(&timer);
-+#else
-+ msleep(10);
-+#endif
-+ }
-+
-+ return 0;
-+}
-+
-+static int yaffs_bg_start(struct yaffs_dev *dev)
-+{
-+ int retval = 0;
-+ struct yaffs_linux_context *context = yaffs_dev_to_lc(dev);
-+
-+ if (dev->read_only)
-+ return -1;
-+
-+ context->bg_running = 1;
-+
-+ context->bg_thread = kthread_run(yaffs_bg_thread_fn,
-+ (void *)dev, "yaffs-bg-%d",
-+ context->mount_id);
-+
-+ if (IS_ERR(context->bg_thread)) {
-+ retval = PTR_ERR(context->bg_thread);
-+ context->bg_thread = NULL;
-+ context->bg_running = 0;
-+ }
-+ return retval;
-+}
-+
-+static void yaffs_bg_stop(struct yaffs_dev *dev)
-+{
-+ struct yaffs_linux_context *ctxt = yaffs_dev_to_lc(dev);
-+
-+ ctxt->bg_running = 0;
-+
-+ if (ctxt->bg_thread) {
-+ kthread_stop(ctxt->bg_thread);
-+ ctxt->bg_thread = NULL;
-+ }
-+}
-+#else
-+static int yaffs_bg_thread_fn(void *data)
-+{
-+ return 0;
-+}
-+
-+static int yaffs_bg_start(struct yaffs_dev *dev)
-+{
-+ return 0;
-+}
-+
-+static void yaffs_bg_stop(struct yaffs_dev *dev)
-+{
-+}
-+#endif
-+
-+
-+static void yaffs_flush_inodes(struct super_block *sb)
-+{
-+ struct inode *iptr;
-+ struct yaffs_obj *obj;
-+
-+ list_for_each_entry(iptr, &sb->s_inodes, i_sb_list) {
-+ obj = yaffs_inode_to_obj(iptr);
-+ if (obj) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "flushing obj %d",
-+ obj->obj_id);
-+ yaffs_flush_file(obj, 1, 0);
-+ }
-+ }
-+}
-+
-+static void yaffs_flush_super(struct super_block *sb, int do_checkpoint)
-+{
-+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
-+ if (!dev)
-+ return;
-+
-+ yaffs_flush_inodes(sb);
-+ yaffs_update_dirty_dirs(dev);
-+ yaffs_flush_whole_cache(dev);
-+ if (do_checkpoint)
-+ yaffs_checkpoint_save(dev);
-+}
-+
-+static LIST_HEAD(yaffs_context_list);
-+struct mutex yaffs_context_lock;
-+
-+static void yaffs_put_super(struct super_block *sb)
-+{
-+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
-+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_ALWAYS,
-+ "yaffs_put_super");
-+
-+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND,
-+ "Shutting down yaffs background thread");
-+ yaffs_bg_stop(dev);
-+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND,
-+ "yaffs background thread shut down");
-+
-+ yaffs_gross_lock(dev);
-+
-+ yaffs_flush_super(sb, 1);
-+
-+ yaffs_deinitialise(dev);
-+
-+ yaffs_gross_unlock(dev);
-+
-+ mutex_lock(&yaffs_context_lock);
-+ list_del_init(&(yaffs_dev_to_lc(dev)->context_list));
-+ mutex_unlock(&yaffs_context_lock);
-+
-+ if (yaffs_dev_to_lc(dev)->spare_buffer) {
-+ kfree(yaffs_dev_to_lc(dev)->spare_buffer);
-+ yaffs_dev_to_lc(dev)->spare_buffer = NULL;
-+ }
-+
-+ kfree(dev);
-+
-+ yaffs_put_mtd_device(mtd);
-+
-+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_ALWAYS,
-+ "yaffs_put_super done");
-+}
-+
-+
-+static unsigned yaffs_gc_control_callback(struct yaffs_dev *dev)
-+{
-+ return yaffs_gc_control;
-+}
-+
-+
-+#ifdef YAFFS_COMPILE_EXPORTFS
-+
-+static struct inode *yaffs2_nfs_get_inode(struct super_block *sb, uint64_t ino,
-+ uint32_t generation)
-+{
-+ return Y_IGET(sb, ino);
-+}
-+
-+static struct dentry *yaffs2_fh_to_dentry(struct super_block *sb,
-+ struct fid *fid, int fh_len,
-+ int fh_type)
-+{
-+ return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
-+ yaffs2_nfs_get_inode);
-+}
-+
-+static struct dentry *yaffs2_fh_to_parent(struct super_block *sb,
-+ struct fid *fid, int fh_len,
-+ int fh_type)
-+{
-+ return generic_fh_to_parent(sb, fid, fh_len, fh_type,
-+ yaffs2_nfs_get_inode);
-+}
-+
-+struct dentry *yaffs2_get_parent(struct dentry *dentry)
-+{
-+
-+ struct super_block *sb = dentry->d_inode->i_sb;
-+ struct dentry *parent = ERR_PTR(-ENOENT);
-+ struct inode *inode;
-+ unsigned long parent_ino;
-+ struct yaffs_obj *d_obj;
-+ struct yaffs_obj *parent_obj;
-+
-+ d_obj = yaffs_inode_to_obj(dentry->d_inode);
-+
-+ if (d_obj) {
-+ parent_obj = d_obj->parent;
-+ if (parent_obj) {
-+ parent_ino = yaffs_get_obj_inode(parent_obj);
-+ inode = Y_IGET(sb, parent_ino);
-+
-+ if (IS_ERR(inode)) {
-+ parent = ERR_CAST(inode);
-+ } else {
-+ parent = d_obtain_alias(inode);
-+ if (!IS_ERR(parent)) {
-+ parent = ERR_PTR(-ENOMEM);
-+ iput(inode);
-+ }
-+ }
-+ }
-+ }
-+
-+ return parent;
-+}
-+
-+/* Just declare a zero structure as a NULL value implies
-+ * using the default functions of exportfs.
-+ */
-+
-+static struct export_operations yaffs_export_ops = {
-+ .fh_to_dentry = yaffs2_fh_to_dentry,
-+ .fh_to_parent = yaffs2_fh_to_parent,
-+ .get_parent = yaffs2_get_parent,
-+};
-+
-+#endif
-+
-+static void yaffs_unstitch_obj(struct inode *inode, struct yaffs_obj *obj)
-+{
-+ /* Clear the association between the inode and
-+ * the struct yaffs_obj.
-+ */
-+ obj->my_inode = NULL;
-+ yaffs_inode_to_obj_lv(inode) = NULL;
-+
-+ /* If the object freeing was deferred, then the real
-+ * free happens now.
-+ * This should fix the inode inconsistency problem.
-+ */
-+ yaffs_handle_defered_free(obj);
-+}
-+
-+#ifdef YAFFS_HAS_EVICT_INODE
-+/* yaffs_evict_inode combines into one operation what was previously done in
-+ * yaffs_clear_inode() and yaffs_delete_inode()
-+ *
-+ */
-+static void yaffs_evict_inode(struct inode *inode)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev;
-+ int deleteme = 0;
-+
-+ obj = yaffs_inode_to_obj(inode);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_evict_inode: ino %d, count %d %s",
-+ (int)inode->i_ino, atomic_read(&inode->i_count),
-+ obj ? "object exists" : "null object");
-+
-+ if (!inode->i_nlink && !is_bad_inode(inode))
-+ deleteme = 1;
-+ truncate_inode_pages(&inode->i_data, 0);
-+ Y_CLEAR_INODE(inode);
-+
-+ if (deleteme && obj) {
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+ yaffs_del_obj(obj);
-+ yaffs_gross_unlock(dev);
-+ }
-+ if (obj) {
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+ yaffs_unstitch_obj(inode, obj);
-+ yaffs_gross_unlock(dev);
-+ }
-+}
-+#else
-+
-+/* clear is called to tell the fs to release any per-inode data it holds.
-+ * The object might still exist on disk and is just being thrown out of the cache
-+ * or else the object has actually been deleted and we're being called via
-+ * the chain
-+ * yaffs_delete_inode() -> clear_inode()->yaffs_clear_inode()
-+ */
-+
-+static void yaffs_clear_inode(struct inode *inode)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev;
-+
-+ obj = yaffs_inode_to_obj(inode);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_clear_inode: ino %d, count %d %s",
-+ (int)inode->i_ino, atomic_read(&inode->i_count),
-+ obj ? "object exists" : "null object");
-+
-+ if (obj) {
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+ yaffs_unstitch_obj(inode, obj);
-+ yaffs_gross_unlock(dev);
-+ }
-+
-+}
-+
-+/* delete is called when the link count is zero and the inode
-+ * is put (ie. nobody wants to know about it anymore, time to
-+ * delete the file).
-+ * NB Must call clear_inode()
-+ */
-+static void yaffs_delete_inode(struct inode *inode)
-+{
-+ struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
-+ struct yaffs_dev *dev;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_delete_inode: ino %d, count %d %s",
-+ (int)inode->i_ino, atomic_read(&inode->i_count),
-+ obj ? "object exists" : "null object");
-+
-+ if (obj) {
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+ yaffs_del_obj(obj);
-+ yaffs_gross_unlock(dev);
-+ }
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
-+ truncate_inode_pages(&inode->i_data, 0);
-+#endif
-+ clear_inode(inode);
-+}
-+#endif
-+
-+
-+
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-+static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf)
-+{
-+ struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev;
-+ struct super_block *sb = dentry->d_sb;
-+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf)
-+{
-+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
-+#else
-+static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
-+{
-+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
-+#endif
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_statfs");
-+
-+ yaffs_gross_lock(dev);
-+
-+ buf->f_type = YAFFS_MAGIC;
-+ buf->f_bsize = sb->s_blocksize;
-+ buf->f_namelen = 255;
-+
-+ if (dev->data_bytes_per_chunk & (dev->data_bytes_per_chunk - 1)) {
-+ /* Do this if chunk size is not a power of 2 */
-+
-+ uint64_t bytes_in_dev;
-+ uint64_t bytes_free;
-+
-+ bytes_in_dev =
-+ ((uint64_t)
-+ ((dev->param.end_block - dev->param.start_block +
-+ 1))) * ((uint64_t) (dev->param.chunks_per_block *
-+ dev->data_bytes_per_chunk));
-+
-+ do_div(bytes_in_dev, sb->s_blocksize); /* bytes_in_dev becomes the number of blocks */
-+ buf->f_blocks = bytes_in_dev;
-+
-+ bytes_free = ((uint64_t) (yaffs_get_n_free_chunks(dev))) *
-+ ((uint64_t) (dev->data_bytes_per_chunk));
-+
-+ do_div(bytes_free, sb->s_blocksize);
-+
-+ buf->f_bfree = bytes_free;
-+
-+ } else if (sb->s_blocksize > dev->data_bytes_per_chunk) {
-+
-+ buf->f_blocks =
-+ (dev->param.end_block - dev->param.start_block + 1) *
-+ dev->param.chunks_per_block /
-+ (sb->s_blocksize / dev->data_bytes_per_chunk);
-+ buf->f_bfree =
-+ yaffs_get_n_free_chunks(dev) /
-+ (sb->s_blocksize / dev->data_bytes_per_chunk);
-+ } else {
-+ buf->f_blocks =
-+ (dev->param.end_block - dev->param.start_block + 1) *
-+ dev->param.chunks_per_block *
-+ (dev->data_bytes_per_chunk / sb->s_blocksize);
-+
-+ buf->f_bfree =
-+ yaffs_get_n_free_chunks(dev) *
-+ (dev->data_bytes_per_chunk / sb->s_blocksize);
-+ }
-+
-+ buf->f_files = 0;
-+ buf->f_ffree = 0;
-+ buf->f_bavail = buf->f_bfree;
-+
-+ yaffs_gross_unlock(dev);
-+ return 0;
-+}
-+
-+
-+
-+static int yaffs_do_sync_fs(struct super_block *sb, int request_checkpoint)
-+{
-+
-+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
-+ unsigned int oneshot_checkpoint = (yaffs_auto_checkpoint & 4);
-+ unsigned gc_urgent = yaffs_bg_gc_urgency(dev);
-+ int do_checkpoint;
-+ int dirty = yaffs_check_super_dirty(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND,
-+ "yaffs_do_sync_fs: gc-urgency %d %s %s%s",
-+ gc_urgent,
-+ dirty ? "dirty" : "clean",
-+ request_checkpoint ? "checkpoint requested" : "no checkpoint",
-+ oneshot_checkpoint ? " one-shot" : "");
-+
-+ yaffs_gross_lock(dev);
-+ do_checkpoint = ((request_checkpoint && !gc_urgent) ||
-+ oneshot_checkpoint) && !dev->is_checkpointed;
-+
-+ if (dirty || do_checkpoint) {
-+ yaffs_flush_super(sb, !dev->is_checkpointed && do_checkpoint);
-+ yaffs_clear_super_dirty(dev);
-+ if (oneshot_checkpoint)
-+ yaffs_auto_checkpoint &= ~4;
-+ }
-+ yaffs_gross_unlock(dev);
-+
-+ return 0;
-+}
-+
-+
-+#ifdef YAFFS_HAS_WRITE_SUPER
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-+static void yaffs_write_super(struct super_block *sb)
-+#else
-+static int yaffs_write_super(struct super_block *sb)
-+#endif
-+{
-+ unsigned request_checkpoint = (yaffs_auto_checkpoint >= 2);
-+
-+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND,
-+ "yaffs_write_super %s",
-+ request_checkpoint ? " checkpt" : "");
-+
-+ yaffs_do_sync_fs(sb, request_checkpoint);
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 18))
-+ return 0;
-+#endif
-+}
-+#endif
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-+static int yaffs_sync_fs(struct super_block *sb, int wait)
-+#else
-+static int yaffs_sync_fs(struct super_block *sb)
-+#endif
-+{
-+ unsigned request_checkpoint = (yaffs_auto_checkpoint >= 1);
-+
-+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC,
-+ "yaffs_sync_fs%s", request_checkpoint ? " checkpt" : "");
-+
-+ yaffs_do_sync_fs(sb, request_checkpoint);
-+
-+ return 0;
-+}
-+
-+
-+
-+static const struct super_operations yaffs_super_ops = {
-+ .statfs = yaffs_statfs,
-+
-+#ifndef YAFFS_USE_OWN_IGET
-+ .read_inode = yaffs_read_inode,
-+#endif
-+#ifdef YAFFS_HAS_PUT_INODE
-+ .put_inode = yaffs_put_inode,
-+#endif
-+ .put_super = yaffs_put_super,
-+#ifdef YAFFS_HAS_EVICT_INODE
-+ .evict_inode = yaffs_evict_inode,
-+#else
-+ .delete_inode = yaffs_delete_inode,
-+ .clear_inode = yaffs_clear_inode,
-+#endif
-+ .sync_fs = yaffs_sync_fs,
-+#ifdef YAFFS_HAS_WRITE_SUPER
-+ .write_super = yaffs_write_super,
-+#endif
-+};
-+
-+struct yaffs_options {
-+ int inband_tags;
-+ int skip_checkpoint_read;
-+ int skip_checkpoint_write;
-+ int no_cache;
-+ int tags_ecc_on;
-+ int tags_ecc_overridden;
-+ int lazy_loading_enabled;
-+ int lazy_loading_overridden;
-+ int empty_lost_and_found;
-+ int empty_lost_and_found_overridden;
-+ int disable_summary;
-+};
-+
-+#define MAX_OPT_LEN 30
-+static int yaffs_parse_options(struct yaffs_options *options,
-+ const char *options_str)
-+{
-+ char cur_opt[MAX_OPT_LEN + 1];
-+ int p;
-+ int error = 0;
-+
-+ /* Parse through the options which is a comma seperated list */
-+
-+ while (options_str && *options_str && !error) {
-+ memset(cur_opt, 0, MAX_OPT_LEN + 1);
-+ p = 0;
-+
-+ while (*options_str == ',')
-+ options_str++;
-+
-+ while (*options_str && *options_str != ',') {
-+ if (p < MAX_OPT_LEN) {
-+ cur_opt[p] = *options_str;
-+ p++;
-+ }
-+ options_str++;
-+ }
-+
-+ if (!strcmp(cur_opt, "inband-tags")) {
-+ options->inband_tags = 1;
-+ } else if (!strcmp(cur_opt, "tags-ecc-off")) {
-+ options->tags_ecc_on = 0;
-+ options->tags_ecc_overridden = 1;
-+ } else if (!strcmp(cur_opt, "tags-ecc-on")) {
-+ options->tags_ecc_on = 1;
-+ options->tags_ecc_overridden = 1;
-+ } else if (!strcmp(cur_opt, "lazy-loading-off")) {
-+ options->lazy_loading_enabled = 0;
-+ options->lazy_loading_overridden = 1;
-+ } else if (!strcmp(cur_opt, "lazy-loading-on")) {
-+ options->lazy_loading_enabled = 1;
-+ options->lazy_loading_overridden = 1;
-+ } else if (!strcmp(cur_opt, "disable-summary")) {
-+ options->disable_summary = 1;
-+ } else if (!strcmp(cur_opt, "empty-lost-and-found-off")) {
-+ options->empty_lost_and_found = 0;
-+ options->empty_lost_and_found_overridden = 1;
-+ } else if (!strcmp(cur_opt, "empty-lost-and-found-on")) {
-+ options->empty_lost_and_found = 1;
-+ options->empty_lost_and_found_overridden = 1;
-+ } else if (!strcmp(cur_opt, "no-cache")) {
-+ options->no_cache = 1;
-+ } else if (!strcmp(cur_opt, "no-checkpoint-read")) {
-+ options->skip_checkpoint_read = 1;
-+ } else if (!strcmp(cur_opt, "no-checkpoint-write")) {
-+ options->skip_checkpoint_write = 1;
-+ } else if (!strcmp(cur_opt, "no-checkpoint")) {
-+ options->skip_checkpoint_read = 1;
-+ options->skip_checkpoint_write = 1;
-+ } else {
-+ printk(KERN_INFO "yaffs: Bad mount option \"%s\"\n",
-+ cur_opt);
-+ error = 1;
-+ }
-+ }
-+
-+ return error;
-+}
-+
-+
-+static struct dentry *yaffs_make_root(struct inode *inode)
-+{
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 4, 0))
-+ struct dentry *root = d_alloc_root(inode);
-+
-+ if (!root)
-+ iput(inode);
-+
-+ return root;
-+#else
-+ return d_make_root(inode);
-+#endif
-+}
-+
-+
-+
-+
-+static struct super_block *yaffs_internal_read_super(int yaffs_version,
-+ struct super_block *sb,
-+ void *data, int silent)
-+{
-+ int n_blocks;
-+ struct inode *inode = NULL;
-+ struct dentry *root;
-+ struct yaffs_dev *dev = 0;
-+ char devname_buf[BDEVNAME_SIZE + 1];
-+ struct mtd_info *mtd;
-+ int err;
-+ char *data_str = (char *)data;
-+ struct yaffs_linux_context *context = NULL;
-+ struct yaffs_param *param;
-+
-+ int read_only = 0;
-+ int inband_tags = 0;
-+
-+ struct yaffs_options options;
-+
-+ unsigned mount_id;
-+ int found;
-+ struct yaffs_linux_context *context_iterator;
-+ struct list_head *l;
-+
-+ if (!sb) {
-+ printk(KERN_INFO "yaffs: sb is NULL\n");
-+ return NULL;
-+ }
-+
-+ sb->s_magic = YAFFS_MAGIC;
-+ sb->s_op = &yaffs_super_ops;
-+ sb->s_flags |= MS_NOATIME;
-+
-+ read_only = ((sb->s_flags & MS_RDONLY) != 0);
-+
-+#ifdef YAFFS_COMPILE_EXPORTFS
-+ sb->s_export_op = &yaffs_export_ops;
-+#endif
-+
-+ if (!sb->s_dev)
-+ printk(KERN_INFO "yaffs: sb->s_dev is NULL\n");
-+ else if (!yaffs_devname(sb, devname_buf))
-+ printk(KERN_INFO "yaffs: devname is NULL\n");
-+ else
-+ printk(KERN_INFO "yaffs: dev is %d name is \"%s\" %s\n",
-+ sb->s_dev,
-+ yaffs_devname(sb, devname_buf), read_only ? "ro" : "rw");
-+
-+ if (!data_str)
-+ data_str = "";
-+
-+ printk(KERN_INFO "yaffs: passed flags \"%s\"\n", data_str);
-+
-+ memset(&options, 0, sizeof(options));
-+
-+ if (yaffs_parse_options(&options, data_str)) {
-+ /* Option parsing failed */
-+ return NULL;
-+ }
-+
-+ sb->s_blocksize = PAGE_CACHE_SIZE;
-+ sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_read_super: Using yaffs%d", yaffs_version);
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_read_super: block size %d", (int)(sb->s_blocksize));
-+
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs: Attempting MTD mount of %u.%u,\"%s\"",
-+ MAJOR(sb->s_dev), MINOR(sb->s_dev),
-+ yaffs_devname(sb, devname_buf));
-+
-+ /* Get the device */
-+ mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
-+ if (IS_ERR(mtd)) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs: MTD device %u either not valid or unavailable",
-+ MINOR(sb->s_dev));
-+ return NULL;
-+ }
-+
-+ if (yaffs_auto_select && yaffs_version == 1 && WRITE_SIZE(mtd) >= 2048) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "auto selecting yaffs2");
-+ yaffs_version = 2;
-+ }
-+
-+ /* Added NCB 26/5/2006 for completeness */
-+ if (yaffs_version == 2 && !options.inband_tags
-+ && WRITE_SIZE(mtd) == 512) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "auto selecting yaffs1");
-+ yaffs_version = 1;
-+ }
-+
-+ if (mtd->oobavail < sizeof(struct yaffs_packed_tags2) ||
-+ options.inband_tags)
-+ inband_tags = 1;
-+
-+ if(yaffs_verify_mtd(mtd, yaffs_version, inband_tags) < 0)
-+ return NULL;
-+
-+ /* OK, so if we got here, we have an MTD that's NAND and looks
-+ * like it has the right capabilities
-+ * Set the struct yaffs_dev up for mtd
-+ */
-+
-+ if (!read_only && !(mtd->flags & MTD_WRITEABLE)) {
-+ read_only = 1;
-+ printk(KERN_INFO
-+ "yaffs: mtd is read only, setting superblock read only\n"
-+ );
-+ sb->s_flags |= MS_RDONLY;
-+ }
-+
-+ dev = kmalloc(sizeof(struct yaffs_dev), GFP_KERNEL);
-+ context = kmalloc(sizeof(struct yaffs_linux_context), GFP_KERNEL);
-+
-+ if (!dev || !context) {
-+ kfree(dev);
-+ kfree(context);
-+ dev = NULL;
-+ context = NULL;
-+
-+ /* Deep shit could not allocate device structure */
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs_read_super: Failed trying to allocate struct yaffs_dev."
-+ );
-+ return NULL;
-+ }
-+ memset(dev, 0, sizeof(struct yaffs_dev));
-+ param = &(dev->param);
-+
-+ memset(context, 0, sizeof(struct yaffs_linux_context));
-+ dev->os_context = context;
-+ INIT_LIST_HEAD(&(context->context_list));
-+ context->dev = dev;
-+ context->super = sb;
-+
-+ dev->read_only = read_only;
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+ sb->s_fs_info = dev;
-+#else
-+ sb->u.generic_sbp = dev;
-+#endif
-+
-+
-+ dev->driver_context = mtd;
-+ param->name = mtd->name;
-+
-+ /* Set up the memory size parameters.... */
-+
-+
-+ param->n_reserved_blocks = 5;
-+ param->n_caches = (options.no_cache) ? 0 : 10;
-+ param->inband_tags = inband_tags;
-+
-+ param->enable_xattr = 1;
-+ if (options.lazy_loading_overridden)
-+ param->disable_lazy_load = !options.lazy_loading_enabled;
-+
-+ param->defered_dir_update = 1;
-+
-+ if (options.tags_ecc_overridden)
-+ param->no_tags_ecc = !options.tags_ecc_on;
-+
-+ param->empty_lost_n_found = 1;
-+ param->refresh_period = 500;
-+ param->disable_summary = options.disable_summary;
-+
-+
-+#ifdef CONFIG_YAFFS_DISABLE_BAD_BLOCK_MARKING
-+ param->disable_bad_block_marking = 1;
-+#endif
-+ if (options.empty_lost_and_found_overridden)
-+ param->empty_lost_n_found = options.empty_lost_and_found;
-+
-+ /* ... and the functions. */
-+ if (yaffs_version == 2) {
-+ param->is_yaffs2 = 1;
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-+ param->total_bytes_per_chunk = mtd->writesize;
-+ param->chunks_per_block = mtd->erasesize / mtd->writesize;
-+#else
-+ param->total_bytes_per_chunk = mtd->oobblock;
-+ param->chunks_per_block = mtd->erasesize / mtd->oobblock;
-+#endif
-+ n_blocks = YCALCBLOCKS(mtd->size, mtd->erasesize);
-+
-+ param->start_block = 0;
-+ param->end_block = n_blocks - 1;
-+ } else {
-+ param->is_yaffs2 = 0;
-+ n_blocks = YCALCBLOCKS(mtd->size,
-+ YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK);
-+
-+ param->chunks_per_block = YAFFS_CHUNKS_PER_BLOCK;
-+ param->total_bytes_per_chunk = YAFFS_BYTES_PER_CHUNK;
-+ }
-+
-+ param->start_block = 0;
-+ param->end_block = n_blocks - 1;
-+
-+ yaffs_mtd_drv_install(dev);
-+
-+ param->sb_dirty_fn = yaffs_set_super_dirty;
-+ param->gc_control_fn = yaffs_gc_control_callback;
-+
-+ yaffs_dev_to_lc(dev)->super = sb;
-+
-+ param->use_nand_ecc = 1;
-+
-+ param->skip_checkpt_rd = options.skip_checkpoint_read;
-+ param->skip_checkpt_wr = options.skip_checkpoint_write;
-+
-+ mutex_lock(&yaffs_context_lock);
-+ /* Get a mount id */
-+ found = 0;
-+ for (mount_id = 0; !found; mount_id++) {
-+ found = 1;
-+ list_for_each(l, &yaffs_context_list) {
-+ context_iterator =
-+ list_entry(l, struct yaffs_linux_context,
-+ context_list);
-+ if (context_iterator->mount_id == mount_id)
-+ found = 0;
-+ }
-+ }
-+ context->mount_id = mount_id;
-+
-+ list_add_tail(&(yaffs_dev_to_lc(dev)->context_list),
-+ &yaffs_context_list);
-+ mutex_unlock(&yaffs_context_lock);
-+
-+ /* Directory search handling... */
-+ INIT_LIST_HEAD(&(yaffs_dev_to_lc(dev)->search_contexts));
-+ param->remove_obj_fn = yaffs_remove_obj_callback;
-+
-+ mutex_init(&(yaffs_dev_to_lc(dev)->gross_lock));
-+
-+ yaffs_gross_lock(dev);
-+
-+ err = yaffs_guts_initialise(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_read_super: guts initialised %s",
-+ (err == YAFFS_OK) ? "OK" : "FAILED");
-+
-+ if (err == YAFFS_OK)
-+ yaffs_bg_start(dev);
-+
-+ if (!context->bg_thread)
-+ param->defered_dir_update = 0;
-+
-+ sb->s_maxbytes = yaffs_max_file_size(dev);
-+
-+ /* Release lock before yaffs_get_inode() */
-+ yaffs_gross_unlock(dev);
-+
-+ /* Create root inode */
-+ if (err == YAFFS_OK)
-+ inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0, yaffs_root(dev));
-+
-+ if (!inode)
-+ return NULL;
-+
-+ inode->i_op = &yaffs_dir_inode_operations;
-+ inode->i_fop = &yaffs_dir_operations;
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_read_super: got root inode");
-+
-+ root = yaffs_make_root(inode);
-+
-+ if (!root)
-+ return NULL;
-+
-+ sb->s_root = root;
-+ if(!dev->is_checkpointed)
-+ yaffs_set_super_dirty(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs_read_super: is_checkpointed %d",
-+ dev->is_checkpointed);
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_read_super: done");
-+ return sb;
-+}
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+static int yaffs_internal_read_super_mtd(struct super_block *sb, void *data,
-+ int silent)
-+{
-+ return yaffs_internal_read_super(1, sb, data, silent) ? 0 : -EINVAL;
-+}
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
-+static struct dentry *yaffs_mount(struct file_system_type *fs_type, int flags,
-+ const char *dev_name, void *data)
-+{
-+ return mount_bdev(fs_type, flags, dev_name, data, yaffs_internal_read_super_mtd);
-+}
-+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-+static int yaffs_read_super(struct file_system_type *fs,
-+ int flags, const char *dev_name,
-+ void *data, struct vfsmount *mnt)
-+{
-+
-+ return get_sb_bdev(fs, flags, dev_name, data,
-+ yaffs_internal_read_super_mtd, mnt);
-+}
-+#else
-+static struct super_block *yaffs_read_super(struct file_system_type *fs,
-+ int flags, const char *dev_name,
-+ void *data)
-+{
-+
-+ return get_sb_bdev(fs, flags, dev_name, data,
-+ yaffs_internal_read_super_mtd);
-+}
-+#endif
-+
-+static struct file_system_type yaffs_fs_type = {
-+ .owner = THIS_MODULE,
-+ .name = "yaffs",
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
-+ .mount = yaffs_mount,
-+#else
-+ .get_sb = yaffs_read_super,
-+#endif
-+ .kill_sb = kill_block_super,
-+ .fs_flags = FS_REQUIRES_DEV,
-+};
-+#else
-+static struct super_block *yaffs_read_super(struct super_block *sb, void *data,
-+ int silent)
-+{
-+ return yaffs_internal_read_super(1, sb, data, silent);
-+}
-+
-+static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super,
-+ FS_REQUIRES_DEV);
-+#endif
-+
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+static int yaffs2_internal_read_super_mtd(struct super_block *sb, void *data,
-+ int silent)
-+{
-+ return yaffs_internal_read_super(2, sb, data, silent) ? 0 : -EINVAL;
-+}
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
-+static struct dentry *yaffs2_mount(struct file_system_type *fs_type, int flags,
-+ const char *dev_name, void *data)
-+{
-+ return mount_bdev(fs_type, flags, dev_name, data, yaffs2_internal_read_super_mtd);
-+}
-+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-+static int yaffs2_read_super(struct file_system_type *fs,
-+ int flags, const char *dev_name, void *data,
-+ struct vfsmount *mnt)
-+{
-+ return get_sb_bdev(fs, flags, dev_name, data,
-+ yaffs2_internal_read_super_mtd, mnt);
-+}
-+#else
-+static struct super_block *yaffs2_read_super(struct file_system_type *fs,
-+ int flags, const char *dev_name,
-+ void *data)
-+{
-+
-+ return get_sb_bdev(fs, flags, dev_name, data,
-+ yaffs2_internal_read_super_mtd);
-+}
-+#endif
-+
-+static struct file_system_type yaffs2_fs_type = {
-+ .owner = THIS_MODULE,
-+ .name = "yaffs2",
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
-+ .mount = yaffs2_mount,
-+#else
-+ .get_sb = yaffs2_read_super,
-+#endif
-+ .kill_sb = kill_block_super,
-+ .fs_flags = FS_REQUIRES_DEV,
-+};
-+#else
-+static struct super_block *yaffs2_read_super(struct super_block *sb,
-+ void *data, int silent)
-+{
-+ return yaffs_internal_read_super(2, sb, data, silent);
-+}
-+
-+static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super,
-+ FS_REQUIRES_DEV);
-+#endif
-+
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 9, 0))
-+static struct proc_dir_entry *my_proc_entry;
-+
-+static char *yaffs_dump_dev_part0(char *buf, struct yaffs_dev *dev)
-+{
-+ struct yaffs_param *param = &dev->param;
-+ int bs[10];
-+
-+ yaffs_count_blocks_by_state(dev,bs);
-+
-+ buf += sprintf(buf, "start_block.......... %d\n", param->start_block);
-+ buf += sprintf(buf, "end_block............ %d\n", param->end_block);
-+ buf += sprintf(buf, "total_bytes_per_chunk %d\n",
-+ param->total_bytes_per_chunk);
-+ buf += sprintf(buf, "use_nand_ecc......... %d\n", param->use_nand_ecc);
-+ buf += sprintf(buf, "no_tags_ecc.......... %d\n", param->no_tags_ecc);
-+ buf += sprintf(buf, "is_yaffs2............ %d\n", param->is_yaffs2);
-+ buf += sprintf(buf, "inband_tags.......... %d\n", param->inband_tags);
-+ buf += sprintf(buf, "empty_lost_n_found... %d\n",
-+ param->empty_lost_n_found);
-+ buf += sprintf(buf, "disable_lazy_load.... %d\n",
-+ param->disable_lazy_load);
-+ buf += sprintf(buf, "disable_bad_block_mrk %d\n",
-+ param->disable_bad_block_marking);
-+ buf += sprintf(buf, "refresh_period....... %d\n",
-+ param->refresh_period);
-+ buf += sprintf(buf, "n_caches............. %d\n", param->n_caches);
-+ buf += sprintf(buf, "n_reserved_blocks.... %d\n",
-+ param->n_reserved_blocks);
-+ buf += sprintf(buf, "always_check_erased.. %d\n",
-+ param->always_check_erased);
-+ buf += sprintf(buf, "\n");
-+ buf += sprintf(buf, "block count by state\n");
-+ buf += sprintf(buf, "0:%d 1:%d 2:%d 3:%d 4:%d\n",
-+ bs[0], bs[1], bs[2], bs[3], bs[4]);
-+ buf += sprintf(buf, "5:%d 6:%d 7:%d 8:%d 9:%d\n",
-+ bs[5], bs[6], bs[7], bs[8], bs[9]);
-+
-+ return buf;
-+}
-+
-+static char *yaffs_dump_dev_part1(char *buf, struct yaffs_dev *dev)
-+{
-+ buf += sprintf(buf, "max file size....... %lld\n",
-+ (long long) yaffs_max_file_size(dev));
-+ buf += sprintf(buf, "data_bytes_per_chunk. %d\n",
-+ dev->data_bytes_per_chunk);
-+ buf += sprintf(buf, "chunk_grp_bits....... %d\n", dev->chunk_grp_bits);
-+ buf += sprintf(buf, "chunk_grp_size....... %d\n", dev->chunk_grp_size);
-+ buf += sprintf(buf, "n_erased_blocks...... %d\n", dev->n_erased_blocks);
-+ buf += sprintf(buf, "blocks_in_checkpt.... %d\n",
-+ dev->blocks_in_checkpt);
-+ buf += sprintf(buf, "\n");
-+ buf += sprintf(buf, "n_tnodes............. %d\n", dev->n_tnodes);
-+ buf += sprintf(buf, "n_obj................ %d\n", dev->n_obj);
-+ buf += sprintf(buf, "n_free_chunks........ %d\n", dev->n_free_chunks);
-+ buf += sprintf(buf, "\n");
-+ buf += sprintf(buf, "n_page_writes........ %u\n", dev->n_page_writes);
-+ buf += sprintf(buf, "n_page_reads......... %u\n", dev->n_page_reads);
-+ buf += sprintf(buf, "n_erasures........... %u\n", dev->n_erasures);
-+ buf += sprintf(buf, "n_gc_copies.......... %u\n", dev->n_gc_copies);
-+ buf += sprintf(buf, "all_gcs.............. %u\n", dev->all_gcs);
-+ buf += sprintf(buf, "passive_gc_count..... %u\n",
-+ dev->passive_gc_count);
-+ buf += sprintf(buf, "oldest_dirty_gc_count %u\n",
-+ dev->oldest_dirty_gc_count);
-+ buf += sprintf(buf, "n_gc_blocks.......... %u\n", dev->n_gc_blocks);
-+ buf += sprintf(buf, "bg_gcs............... %u\n", dev->bg_gcs);
-+ buf += sprintf(buf, "n_retried_writes..... %u\n",
-+ dev->n_retried_writes);
-+ buf += sprintf(buf, "n_retired_blocks..... %u\n",
-+ dev->n_retired_blocks);
-+ buf += sprintf(buf, "n_ecc_fixed.......... %u\n", dev->n_ecc_fixed);
-+ buf += sprintf(buf, "n_ecc_unfixed........ %u\n", dev->n_ecc_unfixed);
-+ buf += sprintf(buf, "n_tags_ecc_fixed..... %u\n",
-+ dev->n_tags_ecc_fixed);
-+ buf += sprintf(buf, "n_tags_ecc_unfixed... %u\n",
-+ dev->n_tags_ecc_unfixed);
-+ buf += sprintf(buf, "cache_hits........... %u\n", dev->cache_hits);
-+ buf += sprintf(buf, "n_deleted_files...... %u\n", dev->n_deleted_files);
-+ buf += sprintf(buf, "n_unlinked_files..... %u\n",
-+ dev->n_unlinked_files);
-+ buf += sprintf(buf, "refresh_count........ %u\n", dev->refresh_count);
-+ buf += sprintf(buf, "n_bg_deletions....... %u\n", dev->n_bg_deletions);
-+ buf += sprintf(buf, "tags_used............ %u\n", dev->tags_used);
-+ buf += sprintf(buf, "summary_used......... %u\n", dev->summary_used);
-+
-+ return buf;
-+}
-+
-+static int yaffs_proc_read(char *page,
-+ char **start,
-+ off_t offset, int count, int *eof, void *data)
-+{
-+ struct list_head *item;
-+ char *buf = page;
-+ int step = offset;
-+ int n = 0;
-+
-+ /* Get proc_file_read() to step 'offset' by one on each sucessive call.
-+ * We use 'offset' (*ppos) to indicate where we are in dev_list.
-+ * This also assumes the user has posted a read buffer large
-+ * enough to hold the complete output; but that's life in /proc.
-+ */
-+
-+ *(int *)start = 1;
-+
-+ /* Print header first */
-+ if (step == 0)
-+ buf +=
-+ sprintf(buf,
-+ "Multi-version YAFFS built:" __DATE__ " " __TIME__
-+ "\n");
-+ else if (step == 1)
-+ buf += sprintf(buf, "\n");
-+ else {
-+ step -= 2;
-+
-+ mutex_lock(&yaffs_context_lock);
-+
-+ /* Locate and print the Nth entry. Order N-squared but N is small. */
-+ list_for_each(item, &yaffs_context_list) {
-+ struct yaffs_linux_context *dc =
-+ list_entry(item, struct yaffs_linux_context,
-+ context_list);
-+ struct yaffs_dev *dev = dc->dev;
-+
-+ if (n < (step & ~1)) {
-+ n += 2;
-+ continue;
-+ }
-+ if ((step & 1) == 0) {
-+ buf +=
-+ sprintf(buf, "\nDevice %d \"%s\"\n", n,
-+ dev->param.name);
-+ buf = yaffs_dump_dev_part0(buf, dev);
-+ } else {
-+ buf = yaffs_dump_dev_part1(buf, dev);
-+ }
-+
-+ break;
-+ }
-+ mutex_unlock(&yaffs_context_lock);
-+ }
-+
-+ return buf - page < count ? buf - page : count;
-+}
-+
-+/**
-+ * Set the verbosity of the warnings and error messages.
-+ *
-+ * Note that the names can only be a..z or _ with the current code.
-+ */
-+
-+static struct {
-+ char *mask_name;
-+ unsigned mask_bitfield;
-+} mask_flags[] = {
-+ {"allocate", YAFFS_TRACE_ALLOCATE},
-+ {"always", YAFFS_TRACE_ALWAYS},
-+ {"background", YAFFS_TRACE_BACKGROUND},
-+ {"bad_blocks", YAFFS_TRACE_BAD_BLOCKS},
-+ {"buffers", YAFFS_TRACE_BUFFERS},
-+ {"bug", YAFFS_TRACE_BUG},
-+ {"checkpt", YAFFS_TRACE_CHECKPOINT},
-+ {"deletion", YAFFS_TRACE_DELETION},
-+ {"erase", YAFFS_TRACE_ERASE},
-+ {"error", YAFFS_TRACE_ERROR},
-+ {"gc_detail", YAFFS_TRACE_GC_DETAIL},
-+ {"gc", YAFFS_TRACE_GC},
-+ {"lock", YAFFS_TRACE_LOCK},
-+ {"mtd", YAFFS_TRACE_MTD},
-+ {"nandaccess", YAFFS_TRACE_NANDACCESS},
-+ {"os", YAFFS_TRACE_OS},
-+ {"scan_debug", YAFFS_TRACE_SCAN_DEBUG},
-+ {"scan", YAFFS_TRACE_SCAN},
-+ {"mount", YAFFS_TRACE_MOUNT},
-+ {"tracing", YAFFS_TRACE_TRACING},
-+ {"sync", YAFFS_TRACE_SYNC},
-+ {"write", YAFFS_TRACE_WRITE},
-+ {"verify", YAFFS_TRACE_VERIFY},
-+ {"verify_nand", YAFFS_TRACE_VERIFY_NAND},
-+ {"verify_full", YAFFS_TRACE_VERIFY_FULL},
-+ {"verify_all", YAFFS_TRACE_VERIFY_ALL},
-+ {"all", 0xffffffff},
-+ {"none", 0},
-+ {NULL, 0},
-+};
-+
-+#define MAX_MASK_NAME_LENGTH 40
-+static int yaffs_proc_write_trace_options(struct file *file, const char *buf,
-+ unsigned long count, void *data)
-+{
-+ unsigned rg = 0, mask_bitfield;
-+ char *end;
-+ char *mask_name;
-+ const char *x;
-+ char substring[MAX_MASK_NAME_LENGTH + 1];
-+ int i;
-+ int done = 0;
-+ int add, len = 0;
-+ int pos = 0;
-+
-+ rg = yaffs_trace_mask;
-+
-+ while (!done && (pos < count)) {
-+ done = 1;
-+ while ((pos < count) && isspace(buf[pos]))
-+ pos++;
-+
-+ switch (buf[pos]) {
-+ case '+':
-+ case '-':
-+ case '=':
-+ add = buf[pos];
-+ pos++;
-+ break;
-+
-+ default:
-+ add = ' ';
-+ break;
-+ }
-+ mask_name = NULL;
-+
-+ mask_bitfield = simple_strtoul(buf + pos, &end, 0);
-+
-+ if (end > buf + pos) {
-+ mask_name = "numeral";
-+ len = end - (buf + pos);
-+ pos += len;
-+ done = 0;
-+ } else {
-+ for (x = buf + pos, i = 0;
-+ (*x == '_' || (*x >= 'a' && *x <= 'z')) &&
-+ i < MAX_MASK_NAME_LENGTH; x++, i++, pos++)
-+ substring[i] = *x;
-+ substring[i] = '\0';
-+
-+ for (i = 0; mask_flags[i].mask_name != NULL; i++) {
-+ if (strcmp(substring, mask_flags[i].mask_name)
-+ == 0) {
-+ mask_name = mask_flags[i].mask_name;
-+ mask_bitfield =
-+ mask_flags[i].mask_bitfield;
-+ done = 0;
-+ break;
-+ }
-+ }
-+ }
-+
-+ if (mask_name != NULL) {
-+ done = 0;
-+ switch (add) {
-+ case '-':
-+ rg &= ~mask_bitfield;
-+ break;
-+ case '+':
-+ rg |= mask_bitfield;
-+ break;
-+ case '=':
-+ rg = mask_bitfield;
-+ break;
-+ default:
-+ rg |= mask_bitfield;
-+ break;
-+ }
-+ }
-+ }
-+
-+ yaffs_trace_mask = rg | YAFFS_TRACE_ALWAYS;
-+
-+ printk(KERN_DEBUG "new trace = 0x%08X\n", yaffs_trace_mask);
-+
-+ if (rg & YAFFS_TRACE_ALWAYS) {
-+ for (i = 0; mask_flags[i].mask_name != NULL; i++) {
-+ char flag;
-+ flag = ((rg & mask_flags[i].mask_bitfield) ==
-+ mask_flags[i].mask_bitfield) ? '+' : '-';
-+ printk(KERN_DEBUG "%c%s\n", flag,
-+ mask_flags[i].mask_name);
-+ }
-+ }
-+
-+ return count;
-+}
-+
-+/* Debug strings are of the form:
-+ * .bnnn print info on block n
-+ * .cobjn,chunkn print nand chunk id for objn:chunkn
-+ */
-+
-+static int yaffs_proc_debug_write(struct file *file, const char *buf,
-+ unsigned long count, void *data)
-+{
-+
-+ char str[100];
-+ char *p0;
-+ char *p1;
-+ long p1_val;
-+ long p0_val;
-+ char cmd;
-+ struct list_head *item;
-+
-+ memset(str, 0, sizeof(str));
-+ memcpy(str, buf, min(count, sizeof(str) -1));
-+
-+ cmd = str[1];
-+
-+ p0 = str + 2;
-+
-+ p1 = p0;
-+
-+ while (*p1 && *p1 != ',') {
-+ p1++;
-+ }
-+ *p1 = '\0';
-+ p1++;
-+
-+ p0_val = simple_strtol(p0, NULL, 0);
-+ p1_val = simple_strtol(p1, NULL, 0);
-+
-+
-+ mutex_lock(&yaffs_context_lock);
-+
-+ /* Locate and print the Nth entry. Order N-squared but N is small. */
-+ list_for_each(item, &yaffs_context_list) {
-+ struct yaffs_linux_context *dc =
-+ list_entry(item, struct yaffs_linux_context,
-+ context_list);
-+ struct yaffs_dev *dev = dc->dev;
-+
-+ if (cmd == 'b') {
-+ struct yaffs_block_info *bi;
-+
-+ bi = yaffs_get_block_info(dev,p0_val);
-+
-+ if(bi) {
-+ printk("Block %d: state %d, retire %d, use %d, seq %d\n",
-+ (int)p0_val, bi->block_state,
-+ bi->needs_retiring, bi->pages_in_use,
-+ bi->seq_number);
-+ }
-+ } else if (cmd == 'c') {
-+ struct yaffs_obj *obj;
-+ int nand_chunk;
-+
-+ obj = yaffs_find_by_number(dev, p0_val);
-+ if (!obj)
-+ printk("No obj %d\n", (int)p0_val);
-+ else {
-+ if(p1_val == 0)
-+ nand_chunk = obj->hdr_chunk;
-+ else
-+ nand_chunk =
-+ yaffs_find_chunk_in_file(obj,
-+ p1_val, NULL);
-+ printk("Nand chunk for %d:%d is %d\n",
-+ (int)p0_val, (int)p1_val, nand_chunk);
-+ }
-+ }
-+ }
-+
-+ mutex_unlock(&yaffs_context_lock);
-+
-+ return count;
-+}
-+
-+static int yaffs_proc_write(struct file *file, const char *buf,
-+ unsigned long count, void *data)
-+{
-+ if (buf[0] == '.')
-+ return yaffs_proc_debug_write(file, buf, count, data);
-+ return yaffs_proc_write_trace_options(file, buf, count, data);
-+}
-+#endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(3, 9, 0)) */
-+
-+/* Stuff to handle installation of file systems */
-+struct file_system_to_install {
-+ struct file_system_type *fst;
-+ int installed;
-+};
-+
-+static struct file_system_to_install fs_to_install[] = {
-+ {&yaffs_fs_type, 0},
-+ {&yaffs2_fs_type, 0},
-+ {NULL, 0}
-+};
-+
-+static int __init init_yaffs_fs(void)
-+{
-+ int error = 0;
-+ struct file_system_to_install *fsinst;
-+
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs built " __DATE__ " " __TIME__ " Installing.");
-+
-+ mutex_init(&yaffs_context_lock);
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 9, 0))
-+ /* Install the proc_fs entries */
-+ my_proc_entry = create_proc_entry("yaffs",
-+ S_IRUGO | S_IFREG, YPROC_ROOT);
-+
-+ if (my_proc_entry) {
-+ my_proc_entry->write_proc = yaffs_proc_write;
-+ my_proc_entry->read_proc = yaffs_proc_read;
-+ my_proc_entry->data = NULL;
-+ } else {
-+ return -ENOMEM;
-+ }
-+#endif
-+
-+ /* Now add the file system entries */
-+
-+ fsinst = fs_to_install;
-+
-+ while (fsinst->fst && !error) {
-+ error = register_filesystem(fsinst->fst);
-+ if (!error)
-+ fsinst->installed = 1;
-+ fsinst++;
-+ }
-+
-+ /* Any errors? uninstall */
-+ if (error) {
-+ fsinst = fs_to_install;
-+
-+ while (fsinst->fst) {
-+ if (fsinst->installed) {
-+ unregister_filesystem(fsinst->fst);
-+ fsinst->installed = 0;
-+ }
-+ fsinst++;
-+ }
-+ }
-+
-+ return error;
-+}
-+
-+static void __exit exit_yaffs_fs(void)
-+{
-+
-+ struct file_system_to_install *fsinst;
-+
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs built " __DATE__ " " __TIME__ " removing.");
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 9, 0))
-+ remove_proc_entry("yaffs", YPROC_ROOT);
-+#endif
-+
-+ fsinst = fs_to_install;
-+
-+ while (fsinst->fst) {
-+ if (fsinst->installed) {
-+ unregister_filesystem(fsinst->fst);
-+ fsinst->installed = 0;
-+ }
-+ fsinst++;
-+ }
-+}
-+
-+module_init(init_yaffs_fs)
-+ module_exit(exit_yaffs_fs)
-+
-+ MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system");
-+MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2011");
-+MODULE_LICENSE("GPL");
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_yaffs1.c linux-3.10.40/fs/yaffs2/yaffs_yaffs1.c
---- linux-3.10.40.orig/fs/yaffs2/yaffs_yaffs1.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_yaffs1.c 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,422 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_yaffs1.h"
-+#include "yportenv.h"
-+#include "yaffs_trace.h"
-+#include "yaffs_bitmap.h"
-+#include "yaffs_getblockinfo.h"
-+#include "yaffs_nand.h"
-+#include "yaffs_attribs.h"
-+
-+int yaffs1_scan(struct yaffs_dev *dev)
-+{
-+ struct yaffs_ext_tags tags;
-+ int blk;
-+ int result;
-+ int chunk;
-+ int c;
-+ int deleted;
-+ enum yaffs_block_state state;
-+ LIST_HEAD(hard_list);
-+ struct yaffs_block_info *bi;
-+ u32 seq_number;
-+ struct yaffs_obj_hdr *oh;
-+ struct yaffs_obj *in;
-+ struct yaffs_obj *parent;
-+ int alloc_failed = 0;
-+ struct yaffs_shadow_fixer *shadow_fixers = NULL;
-+ u8 *chunk_data;
-+
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ "yaffs1_scan starts intstartblk %d intendblk %d...",
-+ dev->internal_start_block, dev->internal_end_block);
-+
-+ chunk_data = yaffs_get_temp_buffer(dev);
-+
-+ dev->seq_number = YAFFS_LOWEST_SEQUENCE_NUMBER;
-+
-+ /* Scan all the blocks to determine their state */
-+ bi = dev->block_info;
-+ for (blk = dev->internal_start_block; blk <= dev->internal_end_block;
-+ blk++) {
-+ yaffs_clear_chunk_bits(dev, blk);
-+ bi->pages_in_use = 0;
-+ bi->soft_del_pages = 0;
-+
-+ yaffs_query_init_block_state(dev, blk, &state, &seq_number);
-+
-+ bi->block_state = state;
-+ bi->seq_number = seq_number;
-+
-+ if (bi->seq_number == YAFFS_SEQUENCE_BAD_BLOCK)
-+ bi->block_state = state = YAFFS_BLOCK_STATE_DEAD;
-+
-+ yaffs_trace(YAFFS_TRACE_SCAN_DEBUG,
-+ "Block scanning block %d state %d seq %d",
-+ blk, state, seq_number);
-+
-+ if (state == YAFFS_BLOCK_STATE_DEAD) {
-+ yaffs_trace(YAFFS_TRACE_BAD_BLOCKS,
-+ "block %d is bad", blk);
-+ } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
-+ yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, "Block empty ");
-+ dev->n_erased_blocks++;
-+ dev->n_free_chunks += dev->param.chunks_per_block;
-+ }
-+ bi++;
-+ }
-+
-+ /* For each block.... */
-+ for (blk = dev->internal_start_block;
-+ !alloc_failed && blk <= dev->internal_end_block; blk++) {
-+
-+ cond_resched();
-+
-+ bi = yaffs_get_block_info(dev, blk);
-+ state = bi->block_state;
-+
-+ deleted = 0;
-+
-+ /* For each chunk in each block that needs scanning.... */
-+ for (c = 0;
-+ !alloc_failed && c < dev->param.chunks_per_block &&
-+ state == YAFFS_BLOCK_STATE_NEEDS_SCAN; c++) {
-+ /* Read the tags and decide what to do */
-+ chunk = blk * dev->param.chunks_per_block + c;
-+
-+ result = yaffs_rd_chunk_tags_nand(dev, chunk, NULL,
-+ &tags);
-+
-+ /* Let's have a good look at this chunk... */
-+
-+ if (tags.ecc_result == YAFFS_ECC_RESULT_UNFIXED ||
-+ tags.is_deleted) {
-+ /* YAFFS1 only...
-+ * A deleted chunk
-+ */
-+ deleted++;
-+ dev->n_free_chunks++;
-+ } else if (!tags.chunk_used) {
-+ /* An unassigned chunk in the block
-+ * This means that either the block is empty or
-+ * this is the one being allocated from
-+ */
-+
-+ if (c == 0) {
-+ /* We're looking at the first chunk in
-+ *the block so the block is unused */
-+ state = YAFFS_BLOCK_STATE_EMPTY;
-+ dev->n_erased_blocks++;
-+ } else {
-+ /* this is the block being allocated */
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ " Allocating from %d %d",
-+ blk, c);
-+ state = YAFFS_BLOCK_STATE_ALLOCATING;
-+ dev->alloc_block = blk;
-+ dev->alloc_page = c;
-+ dev->alloc_block_finder = blk;
-+
-+ }
-+
-+ dev->n_free_chunks +=
-+ (dev->param.chunks_per_block - c);
-+ } else if (tags.chunk_id > 0) {
-+ /* chunk_id > 0 so it is a data chunk... */
-+ unsigned int endpos;
-+
-+ yaffs_set_chunk_bit(dev, blk, c);
-+ bi->pages_in_use++;
-+
-+ in = yaffs_find_or_create_by_number(dev,
-+ tags.obj_id,
-+ YAFFS_OBJECT_TYPE_FILE);
-+ /* PutChunkIntoFile checks for a clash
-+ * (two data chunks with the same chunk_id).
-+ */
-+
-+ if (!in)
-+ alloc_failed = 1;
-+
-+ if (in) {
-+ if (!yaffs_put_chunk_in_file
-+ (in, tags.chunk_id, chunk, 1))
-+ alloc_failed = 1;
-+ }
-+
-+ endpos =
-+ (tags.chunk_id - 1) *
-+ dev->data_bytes_per_chunk +
-+ tags.n_bytes;
-+ if (in &&
-+ in->variant_type ==
-+ YAFFS_OBJECT_TYPE_FILE &&
-+ in->variant.file_variant.scanned_size <
-+ endpos) {
-+ in->variant.file_variant.scanned_size =
-+ endpos;
-+ if (!dev->param.use_header_file_size) {
-+ in->variant.
-+ file_variant.file_size =
-+ in->variant.
-+ file_variant.scanned_size;
-+ }
-+
-+ }
-+ } else {
-+ /* chunk_id == 0, so it is an ObjectHeader.
-+ * Make the object
-+ */
-+ yaffs_set_chunk_bit(dev, blk, c);
-+ bi->pages_in_use++;
-+
-+ result = yaffs_rd_chunk_tags_nand(dev, chunk,
-+ chunk_data,
-+ NULL);
-+
-+ oh = (struct yaffs_obj_hdr *)chunk_data;
-+
-+ in = yaffs_find_by_number(dev, tags.obj_id);
-+ if (in && in->variant_type != oh->type) {
-+ /* This should not happen, but somehow
-+ * Wev'e ended up with an obj_id that
-+ * has been reused but not yet deleted,
-+ * and worse still it has changed type.
-+ * Delete the old object.
-+ */
-+
-+ yaffs_del_obj(in);
-+ in = NULL;
-+ }
-+
-+ in = yaffs_find_or_create_by_number(dev,
-+ tags.obj_id,
-+ oh->type);
-+
-+ if (!in)
-+ alloc_failed = 1;
-+
-+ if (in && oh->shadows_obj > 0) {
-+
-+ struct yaffs_shadow_fixer *fixer;
-+ fixer =
-+ kmalloc(sizeof
-+ (struct yaffs_shadow_fixer),
-+ GFP_NOFS);
-+ if (fixer) {
-+ fixer->next = shadow_fixers;
-+ shadow_fixers = fixer;
-+ fixer->obj_id = tags.obj_id;
-+ fixer->shadowed_id =
-+ oh->shadows_obj;
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ " Shadow fixer: %d shadows %d",
-+ fixer->obj_id,
-+ fixer->shadowed_id);
-+
-+ }
-+
-+ }
-+
-+ if (in && in->valid) {
-+ /* We have already filled this one.
-+ * We have a duplicate and need to
-+ * resolve it. */
-+
-+ unsigned existing_serial = in->serial;
-+ unsigned new_serial =
-+ tags.serial_number;
-+
-+ if (((existing_serial + 1) & 3) ==
-+ new_serial) {
-+ /* Use new one - destroy the
-+ * exisiting one */
-+ yaffs_chunk_del(dev,
-+ in->hdr_chunk,
-+ 1, __LINE__);
-+ in->valid = 0;
-+ } else {
-+ /* Use existing - destroy
-+ * this one. */
-+ yaffs_chunk_del(dev, chunk, 1,
-+ __LINE__);
-+ }
-+ }
-+
-+ if (in && !in->valid &&
-+ (tags.obj_id == YAFFS_OBJECTID_ROOT ||
-+ tags.obj_id ==
-+ YAFFS_OBJECTID_LOSTNFOUND)) {
-+ /* We only load some info, don't fiddle
-+ * with directory structure */
-+ in->valid = 1;
-+ in->variant_type = oh->type;
-+
-+ in->yst_mode = oh->yst_mode;
-+ yaffs_load_attribs(in, oh);
-+ in->hdr_chunk = chunk;
-+ in->serial = tags.serial_number;
-+
-+ } else if (in && !in->valid) {
-+ /* we need to load this info */
-+
-+ in->valid = 1;
-+ in->variant_type = oh->type;
-+
-+ in->yst_mode = oh->yst_mode;
-+ yaffs_load_attribs(in, oh);
-+ in->hdr_chunk = chunk;
-+ in->serial = tags.serial_number;
-+
-+ yaffs_set_obj_name_from_oh(in, oh);
-+ in->dirty = 0;
-+
-+ /* directory stuff...
-+ * hook up to parent
-+ */
-+
-+ parent =
-+ yaffs_find_or_create_by_number
-+ (dev, oh->parent_obj_id,
-+ YAFFS_OBJECT_TYPE_DIRECTORY);
-+ if (!parent)
-+ alloc_failed = 1;
-+ if (parent && parent->variant_type ==
-+ YAFFS_OBJECT_TYPE_UNKNOWN) {
-+ /* Set up as a directory */
-+ parent->variant_type =
-+ YAFFS_OBJECT_TYPE_DIRECTORY;
-+ INIT_LIST_HEAD(&parent->
-+ variant.dir_variant.
-+ children);
-+ } else if (!parent ||
-+ parent->variant_type !=
-+ YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ /* Hoosterman, a problem....
-+ * We're trying to use a
-+ * non-directory as a directory
-+ */
-+
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
-+ );
-+ parent = dev->lost_n_found;
-+ }
-+
-+ yaffs_add_obj_to_dir(parent, in);
-+
-+ switch (in->variant_type) {
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ /* Todo got a problem */
-+ break;
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ if (dev->param.
-+ use_header_file_size)
-+ in->variant.
-+ file_variant.file_size
-+ = yaffs_oh_to_size(oh);
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ in->variant.
-+ hardlink_variant.equiv_id =
-+ oh->equiv_id;
-+ list_add(&in->hard_links,
-+ &hard_list);
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ /* Do nothing */
-+ break;
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ /* Do nothing */
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ in->variant.symlink_variant.
-+ alias =
-+ yaffs_clone_str(oh->alias);
-+ if (!in->variant.
-+ symlink_variant.alias)
-+ alloc_failed = 1;
-+ break;
-+ }
-+ }
-+ }
-+ }
-+
-+ if (state == YAFFS_BLOCK_STATE_NEEDS_SCAN) {
-+ /* If we got this far while scanning,
-+ * then the block is fully allocated. */
-+ state = YAFFS_BLOCK_STATE_FULL;
-+ }
-+
-+ if (state == YAFFS_BLOCK_STATE_ALLOCATING) {
-+ /* If the block was partially allocated then
-+ * treat it as fully allocated. */
-+ state = YAFFS_BLOCK_STATE_FULL;
-+ dev->alloc_block = -1;
-+ }
-+
-+ bi->block_state = state;
-+
-+ /* Now let's see if it was dirty */
-+ if (bi->pages_in_use == 0 &&
-+ !bi->has_shrink_hdr &&
-+ bi->block_state == YAFFS_BLOCK_STATE_FULL)
-+ yaffs_block_became_dirty(dev, blk);
-+ }
-+
-+ /* Ok, we've done all the scanning.
-+ * Fix up the hard link chains.
-+ * We should now have scanned all the objects, now it's time to add
-+ * these hardlinks.
-+ */
-+
-+ yaffs_link_fixup(dev, &hard_list);
-+
-+ /*
-+ * Fix up any shadowed objects.
-+ * There should not be more than one of these.
-+ */
-+ {
-+ struct yaffs_shadow_fixer *fixer;
-+ struct yaffs_obj *obj;
-+
-+ while (shadow_fixers) {
-+ fixer = shadow_fixers;
-+ shadow_fixers = fixer->next;
-+ /* Complete the rename transaction by deleting the
-+ * shadowed object then setting the object header
-+ to unshadowed.
-+ */
-+ obj = yaffs_find_by_number(dev, fixer->shadowed_id);
-+ if (obj)
-+ yaffs_del_obj(obj);
-+
-+ obj = yaffs_find_by_number(dev, fixer->obj_id);
-+
-+ if (obj)
-+ yaffs_update_oh(obj, NULL, 1, 0, 0, NULL);
-+
-+ kfree(fixer);
-+ }
-+ }
-+
-+ yaffs_release_temp_buffer(dev, chunk_data);
-+
-+ if (alloc_failed)
-+ return YAFFS_FAIL;
-+
-+ yaffs_trace(YAFFS_TRACE_SCAN, "yaffs1_scan ends");
-+
-+ return YAFFS_OK;
-+}
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_yaffs1.h linux-3.10.40/fs/yaffs2/yaffs_yaffs1.h
---- linux-3.10.40.orig/fs/yaffs2/yaffs_yaffs1.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_yaffs1.h 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,22 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_YAFFS1_H__
-+#define __YAFFS_YAFFS1_H__
-+
-+#include "yaffs_guts.h"
-+int yaffs1_scan(struct yaffs_dev *dev);
-+
-+#endif
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_yaffs2.c linux-3.10.40/fs/yaffs2/yaffs_yaffs2.c
---- linux-3.10.40.orig/fs/yaffs2/yaffs_yaffs2.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_yaffs2.c 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,1534 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_guts.h"
-+#include "yaffs_trace.h"
-+#include "yaffs_yaffs2.h"
-+#include "yaffs_checkptrw.h"
-+#include "yaffs_bitmap.h"
-+#include "yaffs_nand.h"
-+#include "yaffs_getblockinfo.h"
-+#include "yaffs_verify.h"
-+#include "yaffs_attribs.h"
-+#include "yaffs_summary.h"
-+
-+/*
-+ * Checkpoints are really no benefit on very small partitions.
-+ *
-+ * To save space on small partitions don't bother with checkpoints unless
-+ * the partition is at least this big.
-+ */
-+#define YAFFS_CHECKPOINT_MIN_BLOCKS 60
-+#define YAFFS_SMALL_HOLE_THRESHOLD 4
-+
-+/*
-+ * Oldest Dirty Sequence Number handling.
-+ */
-+
-+/* yaffs_calc_oldest_dirty_seq()
-+ * yaffs2_find_oldest_dirty_seq()
-+ * Calculate the oldest dirty sequence number if we don't know it.
-+ */
-+void yaffs_calc_oldest_dirty_seq(struct yaffs_dev *dev)
-+{
-+ int i;
-+ unsigned seq;
-+ unsigned block_no = 0;
-+ struct yaffs_block_info *b;
-+
-+ if (!dev->param.is_yaffs2)
-+ return;
-+
-+ /* Find the oldest dirty sequence number. */
-+ seq = dev->seq_number + 1;
-+ b = dev->block_info;
-+ for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
-+ if (b->block_state == YAFFS_BLOCK_STATE_FULL &&
-+ (b->pages_in_use - b->soft_del_pages) <
-+ dev->param.chunks_per_block &&
-+ b->seq_number < seq) {
-+ seq = b->seq_number;
-+ block_no = i;
-+ }
-+ b++;
-+ }
-+
-+ if (block_no) {
-+ dev->oldest_dirty_seq = seq;
-+ dev->oldest_dirty_block = block_no;
-+ }
-+}
-+
-+void yaffs2_find_oldest_dirty_seq(struct yaffs_dev *dev)
-+{
-+ if (!dev->param.is_yaffs2)
-+ return;
-+
-+ if (!dev->oldest_dirty_seq)
-+ yaffs_calc_oldest_dirty_seq(dev);
-+}
-+
-+/*
-+ * yaffs_clear_oldest_dirty_seq()
-+ * Called when a block is erased or marked bad. (ie. when its seq_number
-+ * becomes invalid). If the value matches the oldest then we clear
-+ * dev->oldest_dirty_seq to force its recomputation.
-+ */
-+void yaffs2_clear_oldest_dirty_seq(struct yaffs_dev *dev,
-+ struct yaffs_block_info *bi)
-+{
-+
-+ if (!dev->param.is_yaffs2)
-+ return;
-+
-+ if (!bi || bi->seq_number == dev->oldest_dirty_seq) {
-+ dev->oldest_dirty_seq = 0;
-+ dev->oldest_dirty_block = 0;
-+ }
-+}
-+
-+/*
-+ * yaffs2_update_oldest_dirty_seq()
-+ * Update the oldest dirty sequence number whenever we dirty a block.
-+ * Only do this if the oldest_dirty_seq is actually being tracked.
-+ */
-+void yaffs2_update_oldest_dirty_seq(struct yaffs_dev *dev, unsigned block_no,
-+ struct yaffs_block_info *bi)
-+{
-+ if (!dev->param.is_yaffs2)
-+ return;
-+
-+ if (dev->oldest_dirty_seq) {
-+ if (dev->oldest_dirty_seq > bi->seq_number) {
-+ dev->oldest_dirty_seq = bi->seq_number;
-+ dev->oldest_dirty_block = block_no;
-+ }
-+ }
-+}
-+
-+int yaffs_block_ok_for_gc(struct yaffs_dev *dev, struct yaffs_block_info *bi)
-+{
-+
-+ if (!dev->param.is_yaffs2)
-+ return 1; /* disqualification only applies to yaffs2. */
-+
-+ if (!bi->has_shrink_hdr)
-+ return 1; /* can gc */
-+
-+ yaffs2_find_oldest_dirty_seq(dev);
-+
-+ /* Can't do gc of this block if there are any blocks older than this
-+ * one that have discarded pages.
-+ */
-+ return (bi->seq_number <= dev->oldest_dirty_seq);
-+}
-+
-+/*
-+ * yaffs2_find_refresh_block()
-+ * periodically finds the oldest full block by sequence number for refreshing.
-+ * Only for yaffs2.
-+ */
-+u32 yaffs2_find_refresh_block(struct yaffs_dev *dev)
-+{
-+ u32 b;
-+ u32 oldest = 0;
-+ u32 oldest_seq = 0;
-+ struct yaffs_block_info *bi;
-+
-+ if (!dev->param.is_yaffs2)
-+ return oldest;
-+
-+ /*
-+ * If refresh period < 10 then refreshing is disabled.
-+ */
-+ if (dev->param.refresh_period < 10)
-+ return oldest;
-+
-+ /*
-+ * Fix broken values.
-+ */
-+ if (dev->refresh_skip > dev->param.refresh_period)
-+ dev->refresh_skip = dev->param.refresh_period;
-+
-+ if (dev->refresh_skip > 0)
-+ return oldest;
-+
-+ /*
-+ * Refresh skip is now zero.
-+ * We'll do a refresh this time around....
-+ * Update the refresh skip and find the oldest block.
-+ */
-+ dev->refresh_skip = dev->param.refresh_period;
-+ dev->refresh_count++;
-+ bi = dev->block_info;
-+ for (b = dev->internal_start_block; b <= dev->internal_end_block; b++) {
-+
-+ if (bi->block_state == YAFFS_BLOCK_STATE_FULL) {
-+
-+ if (oldest < 1 || bi->seq_number < oldest_seq) {
-+ oldest = b;
-+ oldest_seq = bi->seq_number;
-+ }
-+ }
-+ bi++;
-+ }
-+
-+ if (oldest > 0) {
-+ yaffs_trace(YAFFS_TRACE_GC,
-+ "GC refresh count %d selected block %d with seq_number %d",
-+ dev->refresh_count, oldest, oldest_seq);
-+ }
-+
-+ return oldest;
-+}
-+
-+int yaffs2_checkpt_required(struct yaffs_dev *dev)
-+{
-+ int nblocks;
-+
-+ if (!dev->param.is_yaffs2)
-+ return 0;
-+
-+ nblocks = dev->internal_end_block - dev->internal_start_block + 1;
-+
-+ return !dev->param.skip_checkpt_wr &&
-+ !dev->read_only && (nblocks >= YAFFS_CHECKPOINT_MIN_BLOCKS);
-+}
-+
-+int yaffs_calc_checkpt_blocks_required(struct yaffs_dev *dev)
-+{
-+ int retval;
-+ int n_bytes = 0;
-+ int n_blocks;
-+ int dev_blocks;
-+
-+ if (!dev->param.is_yaffs2)
-+ return 0;
-+
-+ if (!dev->checkpoint_blocks_required && yaffs2_checkpt_required(dev)) {
-+ /* Not a valid value so recalculate */
-+ dev_blocks = dev->param.end_block - dev->param.start_block + 1;
-+ n_bytes += sizeof(struct yaffs_checkpt_validity);
-+ n_bytes += sizeof(struct yaffs_checkpt_dev);
-+ n_bytes += dev_blocks * sizeof(struct yaffs_block_info);
-+ n_bytes += dev_blocks * dev->chunk_bit_stride;
-+ n_bytes +=
-+ (sizeof(struct yaffs_checkpt_obj) + sizeof(u32)) *
-+ dev->n_obj;
-+ n_bytes += (dev->tnode_size + sizeof(u32)) * dev->n_tnodes;
-+ n_bytes += sizeof(struct yaffs_checkpt_validity);
-+ n_bytes += sizeof(u32); /* checksum */
-+
-+ /* Round up and add 2 blocks to allow for some bad blocks,
-+ * so add 3 */
-+
-+ n_blocks =
-+ (n_bytes /
-+ (dev->data_bytes_per_chunk *
-+ dev->param.chunks_per_block)) + 3;
-+
-+ dev->checkpoint_blocks_required = n_blocks;
-+ }
-+
-+ retval = dev->checkpoint_blocks_required - dev->blocks_in_checkpt;
-+ if (retval < 0)
-+ retval = 0;
-+ return retval;
-+}
-+
-+/*--------------------- Checkpointing --------------------*/
-+
-+static int yaffs2_wr_checkpt_validity_marker(struct yaffs_dev *dev, int head)
-+{
-+ struct yaffs_checkpt_validity cp;
-+
-+ memset(&cp, 0, sizeof(cp));
-+
-+ cp.struct_type = sizeof(cp);
-+ cp.magic = YAFFS_MAGIC;
-+ cp.version = YAFFS_CHECKPOINT_VERSION;
-+ cp.head = (head) ? 1 : 0;
-+
-+ return (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp)) ? 1 : 0;
-+}
-+
-+static int yaffs2_rd_checkpt_validity_marker(struct yaffs_dev *dev, int head)
-+{
-+ struct yaffs_checkpt_validity cp;
-+ int ok;
-+
-+ ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp));
-+
-+ if (ok)
-+ ok = (cp.struct_type == sizeof(cp)) &&
-+ (cp.magic == YAFFS_MAGIC) &&
-+ (cp.version == YAFFS_CHECKPOINT_VERSION) &&
-+ (cp.head == ((head) ? 1 : 0));
-+ return ok ? 1 : 0;
-+}
-+
-+static void yaffs2_dev_to_checkpt_dev(struct yaffs_checkpt_dev *cp,
-+ struct yaffs_dev *dev)
-+{
-+ cp->n_erased_blocks = dev->n_erased_blocks;
-+ cp->alloc_block = dev->alloc_block;
-+ cp->alloc_page = dev->alloc_page;
-+ cp->n_free_chunks = dev->n_free_chunks;
-+
-+ cp->n_deleted_files = dev->n_deleted_files;
-+ cp->n_unlinked_files = dev->n_unlinked_files;
-+ cp->n_bg_deletions = dev->n_bg_deletions;
-+ cp->seq_number = dev->seq_number;
-+
-+}
-+
-+static void yaffs_checkpt_dev_to_dev(struct yaffs_dev *dev,
-+ struct yaffs_checkpt_dev *cp)
-+{
-+ dev->n_erased_blocks = cp->n_erased_blocks;
-+ dev->alloc_block = cp->alloc_block;
-+ dev->alloc_page = cp->alloc_page;
-+ dev->n_free_chunks = cp->n_free_chunks;
-+
-+ dev->n_deleted_files = cp->n_deleted_files;
-+ dev->n_unlinked_files = cp->n_unlinked_files;
-+ dev->n_bg_deletions = cp->n_bg_deletions;
-+ dev->seq_number = cp->seq_number;
-+}
-+
-+static int yaffs2_wr_checkpt_dev(struct yaffs_dev *dev)
-+{
-+ struct yaffs_checkpt_dev cp;
-+ u32 n_bytes;
-+ u32 n_blocks = dev->internal_end_block - dev->internal_start_block + 1;
-+ int ok;
-+
-+ /* Write device runtime values */
-+ yaffs2_dev_to_checkpt_dev(&cp, dev);
-+ cp.struct_type = sizeof(cp);
-+
-+ ok = (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp));
-+ if (!ok)
-+ return 0;
-+
-+ /* Write block info */
-+ n_bytes = n_blocks * sizeof(struct yaffs_block_info);
-+ ok = (yaffs2_checkpt_wr(dev, dev->block_info, n_bytes) == n_bytes);
-+ if (!ok)
-+ return 0;
-+
-+ /* Write chunk bits */
-+ n_bytes = n_blocks * dev->chunk_bit_stride;
-+ ok = (yaffs2_checkpt_wr(dev, dev->chunk_bits, n_bytes) == n_bytes);
-+
-+ return ok ? 1 : 0;
-+}
-+
-+static int yaffs2_rd_checkpt_dev(struct yaffs_dev *dev)
-+{
-+ struct yaffs_checkpt_dev cp;
-+ u32 n_bytes;
-+ u32 n_blocks =
-+ (dev->internal_end_block - dev->internal_start_block + 1);
-+ int ok;
-+
-+ ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp));
-+ if (!ok)
-+ return 0;
-+
-+ if (cp.struct_type != sizeof(cp))
-+ return 0;
-+
-+ yaffs_checkpt_dev_to_dev(dev, &cp);
-+
-+ n_bytes = n_blocks * sizeof(struct yaffs_block_info);
-+
-+ ok = (yaffs2_checkpt_rd(dev, dev->block_info, n_bytes) == n_bytes);
-+
-+ if (!ok)
-+ return 0;
-+
-+ n_bytes = n_blocks * dev->chunk_bit_stride;
-+
-+ ok = (yaffs2_checkpt_rd(dev, dev->chunk_bits, n_bytes) == n_bytes);
-+
-+ return ok ? 1 : 0;
-+}
-+
-+static void yaffs2_obj_checkpt_obj(struct yaffs_checkpt_obj *cp,
-+ struct yaffs_obj *obj)
-+{
-+ cp->obj_id = obj->obj_id;
-+ cp->parent_id = (obj->parent) ? obj->parent->obj_id : 0;
-+ cp->hdr_chunk = obj->hdr_chunk;
-+ cp->variant_type = obj->variant_type;
-+ cp->deleted = obj->deleted;
-+ cp->soft_del = obj->soft_del;
-+ cp->unlinked = obj->unlinked;
-+ cp->fake = obj->fake;
-+ cp->rename_allowed = obj->rename_allowed;
-+ cp->unlink_allowed = obj->unlink_allowed;
-+ cp->serial = obj->serial;
-+ cp->n_data_chunks = obj->n_data_chunks;
-+
-+ if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE)
-+ cp->size_or_equiv_obj = obj->variant.file_variant.file_size;
-+ else if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK)
-+ cp->size_or_equiv_obj = obj->variant.hardlink_variant.equiv_id;
-+}
-+
-+static int yaffs2_checkpt_obj_to_obj(struct yaffs_obj *obj,
-+ struct yaffs_checkpt_obj *cp)
-+{
-+ struct yaffs_obj *parent;
-+
-+ if (obj->variant_type != cp->variant_type) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "Checkpoint read object %d type %d chunk %d does not match existing object type %d",
-+ cp->obj_id, cp->variant_type, cp->hdr_chunk,
-+ obj->variant_type);
-+ return 0;
-+ }
-+
-+ obj->obj_id = cp->obj_id;
-+
-+ if (cp->parent_id)
-+ parent = yaffs_find_or_create_by_number(obj->my_dev,
-+ cp->parent_id,
-+ YAFFS_OBJECT_TYPE_DIRECTORY);
-+ else
-+ parent = NULL;
-+
-+ if (parent) {
-+ if (parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "Checkpoint read object %d parent %d type %d chunk %d Parent type, %d, not directory",
-+ cp->obj_id, cp->parent_id,
-+ cp->variant_type, cp->hdr_chunk,
-+ parent->variant_type);
-+ return 0;
-+ }
-+ yaffs_add_obj_to_dir(parent, obj);
-+ }
-+
-+ obj->hdr_chunk = cp->hdr_chunk;
-+ obj->variant_type = cp->variant_type;
-+ obj->deleted = cp->deleted;
-+ obj->soft_del = cp->soft_del;
-+ obj->unlinked = cp->unlinked;
-+ obj->fake = cp->fake;
-+ obj->rename_allowed = cp->rename_allowed;
-+ obj->unlink_allowed = cp->unlink_allowed;
-+ obj->serial = cp->serial;
-+ obj->n_data_chunks = cp->n_data_chunks;
-+
-+ if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE)
-+ obj->variant.file_variant.file_size = cp->size_or_equiv_obj;
-+ else if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK)
-+ obj->variant.hardlink_variant.equiv_id = cp->size_or_equiv_obj;
-+
-+ if (obj->hdr_chunk > 0)
-+ obj->lazy_loaded = 1;
-+ return 1;
-+}
-+
-+static int yaffs2_checkpt_tnode_worker(struct yaffs_obj *in,
-+ struct yaffs_tnode *tn, u32 level,
-+ int chunk_offset)
-+{
-+ int i;
-+ struct yaffs_dev *dev = in->my_dev;
-+ int ok = 1;
-+ u32 base_offset;
-+
-+ if (!tn)
-+ return 1;
-+
-+ if (level > 0) {
-+ for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
-+ if (!tn->internal[i])
-+ continue;
-+ ok = yaffs2_checkpt_tnode_worker(in,
-+ tn->internal[i],
-+ level - 1,
-+ (chunk_offset <<
-+ YAFFS_TNODES_INTERNAL_BITS) + i);
-+ }
-+ return ok;
-+ }
-+
-+ /* Level 0 tnode */
-+ base_offset = chunk_offset << YAFFS_TNODES_LEVEL0_BITS;
-+ ok = (yaffs2_checkpt_wr(dev, &base_offset, sizeof(base_offset)) ==
-+ sizeof(base_offset));
-+ if (ok)
-+ ok = (yaffs2_checkpt_wr(dev, tn, dev->tnode_size) ==
-+ dev->tnode_size);
-+
-+ return ok;
-+}
-+
-+static int yaffs2_wr_checkpt_tnodes(struct yaffs_obj *obj)
-+{
-+ u32 end_marker = ~0;
-+ int ok = 1;
-+
-+ if (obj->variant_type != YAFFS_OBJECT_TYPE_FILE)
-+ return ok;
-+
-+ ok = yaffs2_checkpt_tnode_worker(obj,
-+ obj->variant.file_variant.top,
-+ obj->variant.file_variant.
-+ top_level, 0);
-+ if (ok)
-+ ok = (yaffs2_checkpt_wr(obj->my_dev, &end_marker,
-+ sizeof(end_marker)) == sizeof(end_marker));
-+
-+ return ok ? 1 : 0;
-+}
-+
-+static int yaffs2_rd_checkpt_tnodes(struct yaffs_obj *obj)
-+{
-+ u32 base_chunk;
-+ int ok = 1;
-+ struct yaffs_dev *dev = obj->my_dev;
-+ struct yaffs_file_var *file_stuct_ptr = &obj->variant.file_variant;
-+ struct yaffs_tnode *tn;
-+ int nread = 0;
-+
-+ ok = (yaffs2_checkpt_rd(dev, &base_chunk, sizeof(base_chunk)) ==
-+ sizeof(base_chunk));
-+
-+ while (ok && (~base_chunk)) {
-+ nread++;
-+ /* Read level 0 tnode */
-+
-+ tn = yaffs_get_tnode(dev);
-+ if (tn)
-+ ok = (yaffs2_checkpt_rd(dev, tn, dev->tnode_size) ==
-+ dev->tnode_size);
-+ else
-+ ok = 0;
-+
-+ if (tn && ok)
-+ ok = yaffs_add_find_tnode_0(dev,
-+ file_stuct_ptr,
-+ base_chunk, tn) ? 1 : 0;
-+
-+ if (ok)
-+ ok = (yaffs2_checkpt_rd
-+ (dev, &base_chunk,
-+ sizeof(base_chunk)) == sizeof(base_chunk));
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "Checkpoint read tnodes %d records, last %d. ok %d",
-+ nread, base_chunk, ok);
-+
-+ return ok ? 1 : 0;
-+}
-+
-+static int yaffs2_wr_checkpt_objs(struct yaffs_dev *dev)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_checkpt_obj cp;
-+ int i;
-+ int ok = 1;
-+ struct list_head *lh;
-+
-+ /* Iterate through the objects in each hash entry,
-+ * dumping them to the checkpointing stream.
-+ */
-+
-+ for (i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++) {
-+ list_for_each(lh, &dev->obj_bucket[i].list) {
-+ obj = list_entry(lh, struct yaffs_obj, hash_link);
-+ if (!obj->defered_free) {
-+ yaffs2_obj_checkpt_obj(&cp, obj);
-+ cp.struct_type = sizeof(cp);
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "Checkpoint write object %d parent %d type %d chunk %d obj addr %p",
-+ cp.obj_id, cp.parent_id,
-+ cp.variant_type, cp.hdr_chunk, obj);
-+
-+ ok = (yaffs2_checkpt_wr(dev, &cp,
-+ sizeof(cp)) == sizeof(cp));
-+
-+ if (ok &&
-+ obj->variant_type ==
-+ YAFFS_OBJECT_TYPE_FILE)
-+ ok = yaffs2_wr_checkpt_tnodes(obj);
-+ }
-+ }
-+ }
-+
-+ /* Dump end of list */
-+ memset(&cp, 0xff, sizeof(struct yaffs_checkpt_obj));
-+ cp.struct_type = sizeof(cp);
-+
-+ if (ok)
-+ ok = (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp));
-+
-+ return ok ? 1 : 0;
-+}
-+
-+static int yaffs2_rd_checkpt_objs(struct yaffs_dev *dev)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_checkpt_obj cp;
-+ int ok = 1;
-+ int done = 0;
-+ LIST_HEAD(hard_list);
-+
-+
-+ while (ok && !done) {
-+ ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp));
-+ if (cp.struct_type != sizeof(cp)) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "struct size %d instead of %d ok %d",
-+ cp.struct_type, (int)sizeof(cp), ok);
-+ ok = 0;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "Checkpoint read object %d parent %d type %d chunk %d ",
-+ cp.obj_id, cp.parent_id, cp.variant_type,
-+ cp.hdr_chunk);
-+
-+ if (ok && cp.obj_id == ~0) {
-+ done = 1;
-+ } else if (ok) {
-+ obj =
-+ yaffs_find_or_create_by_number(dev, cp.obj_id,
-+ cp.variant_type);
-+ if (obj) {
-+ ok = yaffs2_checkpt_obj_to_obj(obj, &cp);
-+ if (!ok)
-+ break;
-+ if (obj->variant_type ==
-+ YAFFS_OBJECT_TYPE_FILE) {
-+ ok = yaffs2_rd_checkpt_tnodes(obj);
-+ } else if (obj->variant_type ==
-+ YAFFS_OBJECT_TYPE_HARDLINK) {
-+ list_add(&obj->hard_links, &hard_list);
-+ }
-+ } else {
-+ ok = 0;
-+ }
-+ }
-+ }
-+
-+ if (ok)
-+ yaffs_link_fixup(dev, &hard_list);
-+
-+ return ok ? 1 : 0;
-+}
-+
-+static int yaffs2_wr_checkpt_sum(struct yaffs_dev *dev)
-+{
-+ u32 checkpt_sum;
-+ int ok;
-+
-+ yaffs2_get_checkpt_sum(dev, &checkpt_sum);
-+
-+ ok = (yaffs2_checkpt_wr(dev, &checkpt_sum, sizeof(checkpt_sum)) ==
-+ sizeof(checkpt_sum));
-+
-+ if (!ok)
-+ return 0;
-+
-+ return 1;
-+}
-+
-+static int yaffs2_rd_checkpt_sum(struct yaffs_dev *dev)
-+{
-+ u32 checkpt_sum0;
-+ u32 checkpt_sum1;
-+ int ok;
-+
-+ yaffs2_get_checkpt_sum(dev, &checkpt_sum0);
-+
-+ ok = (yaffs2_checkpt_rd(dev, &checkpt_sum1, sizeof(checkpt_sum1)) ==
-+ sizeof(checkpt_sum1));
-+
-+ if (!ok)
-+ return 0;
-+
-+ if (checkpt_sum0 != checkpt_sum1)
-+ return 0;
-+
-+ return 1;
-+}
-+
-+static int yaffs2_wr_checkpt_data(struct yaffs_dev *dev)
-+{
-+ int ok = 1;
-+
-+ if (!yaffs2_checkpt_required(dev)) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "skipping checkpoint write");
-+ ok = 0;
-+ }
-+
-+ if (ok)
-+ ok = yaffs2_checkpt_open(dev, 1);
-+
-+ if (ok) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "write checkpoint validity");
-+ ok = yaffs2_wr_checkpt_validity_marker(dev, 1);
-+ }
-+ if (ok) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "write checkpoint device");
-+ ok = yaffs2_wr_checkpt_dev(dev);
-+ }
-+ if (ok) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "write checkpoint objects");
-+ ok = yaffs2_wr_checkpt_objs(dev);
-+ }
-+ if (ok) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "write checkpoint validity");
-+ ok = yaffs2_wr_checkpt_validity_marker(dev, 0);
-+ }
-+
-+ if (ok)
-+ ok = yaffs2_wr_checkpt_sum(dev);
-+
-+ if (!yaffs_checkpt_close(dev))
-+ ok = 0;
-+
-+ if (ok)
-+ dev->is_checkpointed = 1;
-+ else
-+ dev->is_checkpointed = 0;
-+
-+ return dev->is_checkpointed;
-+}
-+
-+static int yaffs2_rd_checkpt_data(struct yaffs_dev *dev)
-+{
-+ int ok = 1;
-+
-+ if (!dev->param.is_yaffs2)
-+ ok = 0;
-+
-+ if (ok && dev->param.skip_checkpt_rd) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "skipping checkpoint read");
-+ ok = 0;
-+ }
-+
-+ if (ok)
-+ ok = yaffs2_checkpt_open(dev, 0); /* open for read */
-+
-+ if (ok) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "read checkpoint validity");
-+ ok = yaffs2_rd_checkpt_validity_marker(dev, 1);
-+ }
-+ if (ok) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "read checkpoint device");
-+ ok = yaffs2_rd_checkpt_dev(dev);
-+ }
-+ if (ok) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "read checkpoint objects");
-+ ok = yaffs2_rd_checkpt_objs(dev);
-+ }
-+ if (ok) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "read checkpoint validity");
-+ ok = yaffs2_rd_checkpt_validity_marker(dev, 0);
-+ }
-+
-+ if (ok) {
-+ ok = yaffs2_rd_checkpt_sum(dev);
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "read checkpoint checksum %d", ok);
-+ }
-+
-+ if (!yaffs_checkpt_close(dev))
-+ ok = 0;
-+
-+ if (ok)
-+ dev->is_checkpointed = 1;
-+ else
-+ dev->is_checkpointed = 0;
-+
-+ return ok ? 1 : 0;
-+}
-+
-+void yaffs2_checkpt_invalidate(struct yaffs_dev *dev)
-+{
-+ if (dev->is_checkpointed || dev->blocks_in_checkpt > 0) {
-+ dev->is_checkpointed = 0;
-+ yaffs2_checkpt_invalidate_stream(dev);
-+ }
-+ if (dev->param.sb_dirty_fn)
-+ dev->param.sb_dirty_fn(dev);
-+}
-+
-+int yaffs_checkpoint_save(struct yaffs_dev *dev)
-+{
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "save entry: is_checkpointed %d",
-+ dev->is_checkpointed);
-+
-+ yaffs_verify_objects(dev);
-+ yaffs_verify_blocks(dev);
-+ yaffs_verify_free_chunks(dev);
-+
-+ if (!dev->is_checkpointed) {
-+ yaffs2_checkpt_invalidate(dev);
-+ yaffs2_wr_checkpt_data(dev);
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT | YAFFS_TRACE_MOUNT,
-+ "save exit: is_checkpointed %d",
-+ dev->is_checkpointed);
-+
-+ return dev->is_checkpointed;
-+}
-+
-+int yaffs2_checkpt_restore(struct yaffs_dev *dev)
-+{
-+ int retval;
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "restore entry: is_checkpointed %d",
-+ dev->is_checkpointed);
-+
-+ retval = yaffs2_rd_checkpt_data(dev);
-+
-+ if (dev->is_checkpointed) {
-+ yaffs_verify_objects(dev);
-+ yaffs_verify_blocks(dev);
-+ yaffs_verify_free_chunks(dev);
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "restore exit: is_checkpointed %d",
-+ dev->is_checkpointed);
-+
-+ return retval;
-+}
-+
-+int yaffs2_handle_hole(struct yaffs_obj *obj, loff_t new_size)
-+{
-+ /* if new_size > old_file_size.
-+ * We're going to be writing a hole.
-+ * If the hole is small then write zeros otherwise write a start
-+ * of hole marker.
-+ */
-+ loff_t old_file_size;
-+ loff_t increase;
-+ int small_hole;
-+ int result = YAFFS_OK;
-+ struct yaffs_dev *dev = NULL;
-+ u8 *local_buffer = NULL;
-+ int small_increase_ok = 0;
-+
-+ if (!obj)
-+ return YAFFS_FAIL;
-+
-+ if (obj->variant_type != YAFFS_OBJECT_TYPE_FILE)
-+ return YAFFS_FAIL;
-+
-+ dev = obj->my_dev;
-+
-+ /* Bail out if not yaffs2 mode */
-+ if (!dev->param.is_yaffs2)
-+ return YAFFS_OK;
-+
-+ old_file_size = obj->variant.file_variant.file_size;
-+
-+ if (new_size <= old_file_size)
-+ return YAFFS_OK;
-+
-+ increase = new_size - old_file_size;
-+
-+ if (increase < YAFFS_SMALL_HOLE_THRESHOLD * dev->data_bytes_per_chunk &&
-+ yaffs_check_alloc_available(dev, YAFFS_SMALL_HOLE_THRESHOLD + 1))
-+ small_hole = 1;
-+ else
-+ small_hole = 0;
-+
-+ if (small_hole)
-+ local_buffer = yaffs_get_temp_buffer(dev);
-+
-+ if (local_buffer) {
-+ /* fill hole with zero bytes */
-+ loff_t pos = old_file_size;
-+ int this_write;
-+ int written;
-+ memset(local_buffer, 0, dev->data_bytes_per_chunk);
-+ small_increase_ok = 1;
-+
-+ while (increase > 0 && small_increase_ok) {
-+ this_write = increase;
-+ if (this_write > dev->data_bytes_per_chunk)
-+ this_write = dev->data_bytes_per_chunk;
-+ written =
-+ yaffs_do_file_wr(obj, local_buffer, pos, this_write,
-+ 0);
-+ if (written == this_write) {
-+ pos += this_write;
-+ increase -= this_write;
-+ } else {
-+ small_increase_ok = 0;
-+ }
-+ }
-+
-+ yaffs_release_temp_buffer(dev, local_buffer);
-+
-+ /* If out of space then reverse any chunks we've added */
-+ if (!small_increase_ok)
-+ yaffs_resize_file_down(obj, old_file_size);
-+ }
-+
-+ if (!small_increase_ok &&
-+ obj->parent &&
-+ obj->parent->obj_id != YAFFS_OBJECTID_UNLINKED &&
-+ obj->parent->obj_id != YAFFS_OBJECTID_DELETED) {
-+ /* Write a hole start header with the old file size */
-+ yaffs_update_oh(obj, NULL, 0, 1, 0, NULL);
-+ }
-+
-+ return result;
-+}
-+
-+struct yaffs_block_index {
-+ int seq;
-+ int block;
-+};
-+
-+static int yaffs2_ybicmp(const void *a, const void *b)
-+{
-+ int aseq = ((struct yaffs_block_index *)a)->seq;
-+ int bseq = ((struct yaffs_block_index *)b)->seq;
-+ int ablock = ((struct yaffs_block_index *)a)->block;
-+ int bblock = ((struct yaffs_block_index *)b)->block;
-+
-+ if (aseq == bseq)
-+ return ablock - bblock;
-+
-+ return aseq - bseq;
-+}
-+
-+static inline int yaffs2_scan_chunk(struct yaffs_dev *dev,
-+ struct yaffs_block_info *bi,
-+ int blk, int chunk_in_block,
-+ int *found_chunks,
-+ u8 *chunk_data,
-+ struct list_head *hard_list,
-+ int summary_available)
-+{
-+ struct yaffs_obj_hdr *oh;
-+ struct yaffs_obj *in;
-+ struct yaffs_obj *parent;
-+ int equiv_id;
-+ loff_t file_size;
-+ int is_shrink;
-+ int is_unlinked;
-+ struct yaffs_ext_tags tags;
-+ int result;
-+ int alloc_failed = 0;
-+ int chunk = blk * dev->param.chunks_per_block + chunk_in_block;
-+ struct yaffs_file_var *file_var;
-+ struct yaffs_hardlink_var *hl_var;
-+ struct yaffs_symlink_var *sl_var;
-+
-+ if (summary_available) {
-+ result = yaffs_summary_fetch(dev, &tags, chunk_in_block);
-+ tags.seq_number = bi->seq_number;
-+ }
-+
-+ if (!summary_available || tags.obj_id == 0) {
-+ result = yaffs_rd_chunk_tags_nand(dev, chunk, NULL, &tags);
-+ dev->tags_used++;
-+ } else {
-+ dev->summary_used++;
-+ }
-+
-+ /* Let's have a good look at this chunk... */
-+
-+ if (!tags.chunk_used) {
-+ /* An unassigned chunk in the block.
-+ * If there are used chunks after this one, then
-+ * it is a chunk that was skipped due to failing
-+ * the erased check. Just skip it so that it can
-+ * be deleted.
-+ * But, more typically, We get here when this is
-+ * an unallocated chunk and his means that
-+ * either the block is empty or this is the one
-+ * being allocated from
-+ */
-+
-+ if (*found_chunks) {
-+ /* This is a chunk that was skipped due
-+ * to failing the erased check */
-+ } else if (chunk_in_block == 0) {
-+ /* We're looking at the first chunk in
-+ * the block so the block is unused */
-+ bi->block_state = YAFFS_BLOCK_STATE_EMPTY;
-+ dev->n_erased_blocks++;
-+ } else {
-+ if (bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCAN ||
-+ bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING) {
-+ if (dev->seq_number == bi->seq_number) {
-+ /* Allocating from this block*/
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ " Allocating from %d %d",
-+ blk, chunk_in_block);
-+
-+ bi->block_state =
-+ YAFFS_BLOCK_STATE_ALLOCATING;
-+ dev->alloc_block = blk;
-+ dev->alloc_page = chunk_in_block;
-+ dev->alloc_block_finder = blk;
-+ } else {
-+ /* This is a partially written block
-+ * that is not the current
-+ * allocation block.
-+ */
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ "Partially written block %d detected. gc will fix this.",
-+ blk);
-+ }
-+ }
-+ }
-+
-+ dev->n_free_chunks++;
-+
-+ } else if (tags.ecc_result ==
-+ YAFFS_ECC_RESULT_UNFIXED) {
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ " Unfixed ECC in chunk(%d:%d), chunk ignored",
-+ blk, chunk_in_block);
-+ dev->n_free_chunks++;
-+ } else if (tags.obj_id > YAFFS_MAX_OBJECT_ID ||
-+ tags.chunk_id > YAFFS_MAX_CHUNK_ID ||
-+ tags.obj_id == YAFFS_OBJECTID_SUMMARY ||
-+ (tags.chunk_id > 0 &&
-+ tags.n_bytes > dev->data_bytes_per_chunk) ||
-+ tags.seq_number != bi->seq_number) {
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ "Chunk (%d:%d) with bad tags:obj = %d, chunk_id = %d, n_bytes = %d, ignored",
-+ blk, chunk_in_block, tags.obj_id,
-+ tags.chunk_id, tags.n_bytes);
-+ dev->n_free_chunks++;
-+ } else if (tags.chunk_id > 0) {
-+ /* chunk_id > 0 so it is a data chunk... */
-+ loff_t endpos;
-+ loff_t chunk_base = (tags.chunk_id - 1) *
-+ dev->data_bytes_per_chunk;
-+
-+ *found_chunks = 1;
-+
-+ yaffs_set_chunk_bit(dev, blk, chunk_in_block);
-+ bi->pages_in_use++;
-+
-+ in = yaffs_find_or_create_by_number(dev,
-+ tags.obj_id,
-+ YAFFS_OBJECT_TYPE_FILE);
-+ if (!in)
-+ /* Out of memory */
-+ alloc_failed = 1;
-+
-+ if (in &&
-+ in->variant_type == YAFFS_OBJECT_TYPE_FILE &&
-+ chunk_base < in->variant.file_variant.shrink_size) {
-+ /* This has not been invalidated by
-+ * a resize */
-+ if (!yaffs_put_chunk_in_file(in, tags.chunk_id,
-+ chunk, -1))
-+ alloc_failed = 1;
-+
-+ /* File size is calculated by looking at
-+ * the data chunks if we have not
-+ * seen an object header yet.
-+ * Stop this practice once we find an
-+ * object header.
-+ */
-+ endpos = chunk_base + tags.n_bytes;
-+
-+ if (!in->valid &&
-+ in->variant.file_variant.scanned_size < endpos) {
-+ in->variant.file_variant.
-+ scanned_size = endpos;
-+ in->variant.file_variant.
-+ file_size = endpos;
-+ }
-+ } else if (in) {
-+ /* This chunk has been invalidated by a
-+ * resize, or a past file deletion
-+ * so delete the chunk*/
-+ yaffs_chunk_del(dev, chunk, 1, __LINE__);
-+ }
-+ } else {
-+ /* chunk_id == 0, so it is an ObjectHeader.
-+ * Thus, we read in the object header and make
-+ * the object
-+ */
-+ *found_chunks = 1;
-+
-+ yaffs_set_chunk_bit(dev, blk, chunk_in_block);
-+ bi->pages_in_use++;
-+
-+ oh = NULL;
-+ in = NULL;
-+
-+ if (tags.extra_available) {
-+ in = yaffs_find_or_create_by_number(dev,
-+ tags.obj_id,
-+ tags.extra_obj_type);
-+ if (!in)
-+ alloc_failed = 1;
-+ }
-+
-+ if (!in ||
-+ (!in->valid && dev->param.disable_lazy_load) ||
-+ tags.extra_shadows ||
-+ (!in->valid && (tags.obj_id == YAFFS_OBJECTID_ROOT ||
-+ tags.obj_id == YAFFS_OBJECTID_LOSTNFOUND))) {
-+
-+ /* If we don't have valid info then we
-+ * need to read the chunk
-+ * TODO In future we can probably defer
-+ * reading the chunk and living with
-+ * invalid data until needed.
-+ */
-+
-+ result = yaffs_rd_chunk_tags_nand(dev,
-+ chunk,
-+ chunk_data,
-+ NULL);
-+
-+ oh = (struct yaffs_obj_hdr *)chunk_data;
-+
-+ if (dev->param.inband_tags) {
-+ /* Fix up the header if they got
-+ * corrupted by inband tags */
-+ oh->shadows_obj =
-+ oh->inband_shadowed_obj_id;
-+ oh->is_shrink =
-+ oh->inband_is_shrink;
-+ }
-+
-+ if (!in) {
-+ in = yaffs_find_or_create_by_number(dev,
-+ tags.obj_id, oh->type);
-+ if (!in)
-+ alloc_failed = 1;
-+ }
-+ }
-+
-+ if (!in) {
-+ /* TODO Hoosterman we have a problem! */
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs tragedy: Could not make object for object %d at chunk %d during scan",
-+ tags.obj_id, chunk);
-+ return YAFFS_FAIL;
-+ }
-+
-+ if (in->valid) {
-+ /* We have already filled this one.
-+ * We have a duplicate that will be
-+ * discarded, but we first have to suck
-+ * out resize info if it is a file.
-+ */
-+ if ((in->variant_type == YAFFS_OBJECT_TYPE_FILE) &&
-+ ((oh && oh->type == YAFFS_OBJECT_TYPE_FILE) ||
-+ (tags.extra_available &&
-+ tags.extra_obj_type == YAFFS_OBJECT_TYPE_FILE)
-+ )) {
-+ loff_t this_size = (oh) ?
-+ yaffs_oh_to_size(oh) :
-+ tags.extra_file_size;
-+ u32 parent_obj_id = (oh) ?
-+ oh->parent_obj_id :
-+ tags.extra_parent_id;
-+
-+ is_shrink = (oh) ?
-+ oh->is_shrink :
-+ tags.extra_is_shrink;
-+
-+ /* If it is deleted (unlinked
-+ * at start also means deleted)
-+ * we treat the file size as
-+ * being zeroed at this point.
-+ */
-+ if (parent_obj_id == YAFFS_OBJECTID_DELETED ||
-+ parent_obj_id == YAFFS_OBJECTID_UNLINKED) {
-+ this_size = 0;
-+ is_shrink = 1;
-+ }
-+
-+ if (is_shrink &&
-+ in->variant.file_variant.shrink_size >
-+ this_size)
-+ in->variant.file_variant.shrink_size =
-+ this_size;
-+
-+ if (is_shrink)
-+ bi->has_shrink_hdr = 1;
-+ }
-+ /* Use existing - destroy this one. */
-+ yaffs_chunk_del(dev, chunk, 1, __LINE__);
-+ }
-+
-+ if (!in->valid && in->variant_type !=
-+ (oh ? oh->type : tags.extra_obj_type)) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs tragedy: Bad type, %d != %d, for object %d at chunk %d during scan",
-+ oh ? oh->type : tags.extra_obj_type,
-+ in->variant_type, tags.obj_id,
-+ chunk);
-+ in = yaffs_retype_obj(in, oh ? oh->type : tags.extra_obj_type);
-+ }
-+
-+ if (!in->valid &&
-+ (tags.obj_id == YAFFS_OBJECTID_ROOT ||
-+ tags.obj_id == YAFFS_OBJECTID_LOSTNFOUND)) {
-+ /* We only load some info, don't fiddle
-+ * with directory structure */
-+ in->valid = 1;
-+
-+ if (oh) {
-+ in->yst_mode = oh->yst_mode;
-+ yaffs_load_attribs(in, oh);
-+ in->lazy_loaded = 0;
-+ } else {
-+ in->lazy_loaded = 1;
-+ }
-+ in->hdr_chunk = chunk;
-+
-+ } else if (!in->valid) {
-+ /* we need to load this info */
-+ in->valid = 1;
-+ in->hdr_chunk = chunk;
-+ if (oh) {
-+ in->variant_type = oh->type;
-+ in->yst_mode = oh->yst_mode;
-+ yaffs_load_attribs(in, oh);
-+
-+ if (oh->shadows_obj > 0)
-+ yaffs_handle_shadowed_obj(dev,
-+ oh->shadows_obj, 1);
-+
-+ yaffs_set_obj_name_from_oh(in, oh);
-+ parent = yaffs_find_or_create_by_number(dev,
-+ oh->parent_obj_id,
-+ YAFFS_OBJECT_TYPE_DIRECTORY);
-+ file_size = yaffs_oh_to_size(oh);
-+ is_shrink = oh->is_shrink;
-+ equiv_id = oh->equiv_id;
-+ } else {
-+ in->variant_type = tags.extra_obj_type;
-+ parent = yaffs_find_or_create_by_number(dev,
-+ tags.extra_parent_id,
-+ YAFFS_OBJECT_TYPE_DIRECTORY);
-+ file_size = tags.extra_file_size;
-+ is_shrink = tags.extra_is_shrink;
-+ equiv_id = tags.extra_equiv_id;
-+ in->lazy_loaded = 1;
-+ }
-+ in->dirty = 0;
-+
-+ if (!parent)
-+ alloc_failed = 1;
-+
-+ /* directory stuff...
-+ * hook up to parent
-+ */
-+
-+ if (parent &&
-+ parent->variant_type == YAFFS_OBJECT_TYPE_UNKNOWN) {
-+ /* Set up as a directory */
-+ parent->variant_type =
-+ YAFFS_OBJECT_TYPE_DIRECTORY;
-+ INIT_LIST_HEAD(&parent->
-+ variant.dir_variant.children);
-+ } else if (!parent ||
-+ parent->variant_type !=
-+ YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ /* Hoosterman, another problem....
-+ * Trying to use a non-directory as a directory
-+ */
-+
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
-+ );
-+ parent = dev->lost_n_found;
-+ }
-+ yaffs_add_obj_to_dir(parent, in);
-+
-+ is_unlinked = (parent == dev->del_dir) ||
-+ (parent == dev->unlinked_dir);
-+
-+ if (is_shrink)
-+ /* Mark the block */
-+ bi->has_shrink_hdr = 1;
-+
-+ /* Note re hardlinks.
-+ * Since we might scan a hardlink before its equivalent
-+ * object is scanned we put them all in a list.
-+ * After scanning is complete, we should have all the
-+ * objects, so we run through this list and fix up all
-+ * the chains.
-+ */
-+
-+ switch (in->variant_type) {
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ /* Todo got a problem */
-+ break;
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ file_var = &in->variant.file_variant;
-+ if (file_var->scanned_size < file_size) {
-+ /* This covers the case where the file
-+ * size is greater than the data held.
-+ * This will happen if the file is
-+ * resized to be larger than its
-+ * current data extents.
-+ */
-+ file_var->file_size = file_size;
-+ file_var->scanned_size = file_size;
-+ }
-+
-+ if (file_var->shrink_size > file_size)
-+ file_var->shrink_size = file_size;
-+
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ hl_var = &in->variant.hardlink_variant;
-+ if (!is_unlinked) {
-+ hl_var->equiv_id = equiv_id;
-+ list_add(&in->hard_links, hard_list);
-+ }
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ /* Do nothing */
-+ break;
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ /* Do nothing */
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ sl_var = &in->variant.symlink_variant;
-+ if (oh) {
-+ sl_var->alias =
-+ yaffs_clone_str(oh->alias);
-+ if (!sl_var->alias)
-+ alloc_failed = 1;
-+ }
-+ break;
-+ }
-+ }
-+ }
-+ return alloc_failed ? YAFFS_FAIL : YAFFS_OK;
-+}
-+
-+int yaffs2_scan_backwards(struct yaffs_dev *dev)
-+{
-+ int blk;
-+ int block_iter;
-+ int start_iter;
-+ int end_iter;
-+ int n_to_scan = 0;
-+ enum yaffs_block_state state;
-+ int c;
-+ int deleted;
-+ LIST_HEAD(hard_list);
-+ struct yaffs_block_info *bi;
-+ u32 seq_number;
-+ int n_blocks = dev->internal_end_block - dev->internal_start_block + 1;
-+ u8 *chunk_data;
-+ int found_chunks;
-+ int alloc_failed = 0;
-+ struct yaffs_block_index *block_index = NULL;
-+ int alt_block_index = 0;
-+ int summary_available;
-+
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ "yaffs2_scan_backwards starts intstartblk %d intendblk %d...",
-+ dev->internal_start_block, dev->internal_end_block);
-+
-+ dev->seq_number = YAFFS_LOWEST_SEQUENCE_NUMBER;
-+
-+ block_index =
-+ kmalloc(n_blocks * sizeof(struct yaffs_block_index), GFP_NOFS);
-+
-+ if (!block_index) {
-+ block_index =
-+ vmalloc(n_blocks * sizeof(struct yaffs_block_index));
-+ alt_block_index = 1;
-+ }
-+
-+ if (!block_index) {
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ "yaffs2_scan_backwards() could not allocate block index!"
-+ );
-+ return YAFFS_FAIL;
-+ }
-+
-+ dev->blocks_in_checkpt = 0;
-+
-+ chunk_data = yaffs_get_temp_buffer(dev);
-+
-+ /* Scan all the blocks to determine their state */
-+ bi = dev->block_info;
-+ for (blk = dev->internal_start_block; blk <= dev->internal_end_block;
-+ blk++) {
-+ yaffs_clear_chunk_bits(dev, blk);
-+ bi->pages_in_use = 0;
-+ bi->soft_del_pages = 0;
-+
-+ yaffs_query_init_block_state(dev, blk, &state, &seq_number);
-+
-+ bi->block_state = state;
-+ bi->seq_number = seq_number;
-+
-+ if (bi->seq_number == YAFFS_SEQUENCE_CHECKPOINT_DATA)
-+ bi->block_state = YAFFS_BLOCK_STATE_CHECKPOINT;
-+ if (bi->seq_number == YAFFS_SEQUENCE_BAD_BLOCK)
-+ bi->block_state = YAFFS_BLOCK_STATE_DEAD;
-+
-+ yaffs_trace(YAFFS_TRACE_SCAN_DEBUG,
-+ "Block scanning block %d state %d seq %d",
-+ blk, bi->block_state, seq_number);
-+
-+ if (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT) {
-+ dev->blocks_in_checkpt++;
-+
-+ } else if (bi->block_state == YAFFS_BLOCK_STATE_DEAD) {
-+ yaffs_trace(YAFFS_TRACE_BAD_BLOCKS,
-+ "block %d is bad", blk);
-+ } else if (bi->block_state == YAFFS_BLOCK_STATE_EMPTY) {
-+ yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, "Block empty ");
-+ dev->n_erased_blocks++;
-+ dev->n_free_chunks += dev->param.chunks_per_block;
-+ } else if (bi->block_state ==
-+ YAFFS_BLOCK_STATE_NEEDS_SCAN) {
-+ /* Determine the highest sequence number */
-+ if (seq_number >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
-+ seq_number < YAFFS_HIGHEST_SEQUENCE_NUMBER) {
-+ block_index[n_to_scan].seq = seq_number;
-+ block_index[n_to_scan].block = blk;
-+ n_to_scan++;
-+ if (seq_number >= dev->seq_number)
-+ dev->seq_number = seq_number;
-+ } else {
-+ /* TODO: Nasty sequence number! */
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ "Block scanning block %d has bad sequence number %d",
-+ blk, seq_number);
-+ }
-+ }
-+ bi++;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "%d blocks to be sorted...", n_to_scan);
-+
-+ cond_resched();
-+
-+ /* Sort the blocks by sequence number */
-+ sort(block_index, n_to_scan, sizeof(struct yaffs_block_index),
-+ yaffs2_ybicmp, NULL);
-+
-+ cond_resched();
-+
-+ yaffs_trace(YAFFS_TRACE_SCAN, "...done");
-+
-+ /* Now scan the blocks looking at the data. */
-+ start_iter = 0;
-+ end_iter = n_to_scan - 1;
-+ yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, "%d blocks to scan", n_to_scan);
-+
-+ /* For each block.... backwards */
-+ for (block_iter = end_iter;
-+ !alloc_failed && block_iter >= start_iter;
-+ block_iter--) {
-+ /* Cooperative multitasking! This loop can run for so
-+ long that watchdog timers expire. */
-+ cond_resched();
-+
-+ /* get the block to scan in the correct order */
-+ blk = block_index[block_iter].block;
-+ bi = yaffs_get_block_info(dev, blk);
-+ deleted = 0;
-+
-+ summary_available = yaffs_summary_read(dev, dev->sum_tags, blk);
-+
-+ /* For each chunk in each block that needs scanning.... */
-+ found_chunks = 0;
-+ if (summary_available)
-+ c = dev->chunks_per_summary - 1;
-+ else
-+ c = dev->param.chunks_per_block - 1;
-+
-+ for (/* c is already initialised */;
-+ !alloc_failed && c >= 0 &&
-+ (bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCAN ||
-+ bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING);
-+ c--) {
-+ /* Scan backwards...
-+ * Read the tags and decide what to do
-+ */
-+ if (yaffs2_scan_chunk(dev, bi, blk, c,
-+ &found_chunks, chunk_data,
-+ &hard_list, summary_available) ==
-+ YAFFS_FAIL)
-+ alloc_failed = 1;
-+ }
-+
-+ if (bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCAN) {
-+ /* If we got this far while scanning, then the block
-+ * is fully allocated. */
-+ bi->block_state = YAFFS_BLOCK_STATE_FULL;
-+ }
-+
-+ /* Now let's see if it was dirty */
-+ if (bi->pages_in_use == 0 &&
-+ !bi->has_shrink_hdr &&
-+ bi->block_state == YAFFS_BLOCK_STATE_FULL) {
-+ yaffs_block_became_dirty(dev, blk);
-+ }
-+ }
-+
-+ yaffs_skip_rest_of_block(dev);
-+
-+ if (alt_block_index)
-+ vfree(block_index);
-+ else
-+ kfree(block_index);
-+
-+ /* Ok, we've done all the scanning.
-+ * Fix up the hard link chains.
-+ * We have scanned all the objects, now it's time to add these
-+ * hardlinks.
-+ */
-+ yaffs_link_fixup(dev, &hard_list);
-+
-+ yaffs_release_temp_buffer(dev, chunk_data);
-+
-+ if (alloc_failed)
-+ return YAFFS_FAIL;
-+
-+ yaffs_trace(YAFFS_TRACE_SCAN, "yaffs2_scan_backwards ends");
-+
-+ return YAFFS_OK;
-+}
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yaffs_yaffs2.h linux-3.10.40/fs/yaffs2/yaffs_yaffs2.h
---- linux-3.10.40.orig/fs/yaffs2/yaffs_yaffs2.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yaffs_yaffs2.h 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,39 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_YAFFS2_H__
-+#define __YAFFS_YAFFS2_H__
-+
-+#include "yaffs_guts.h"
-+
-+void yaffs_calc_oldest_dirty_seq(struct yaffs_dev *dev);
-+void yaffs2_find_oldest_dirty_seq(struct yaffs_dev *dev);
-+void yaffs2_clear_oldest_dirty_seq(struct yaffs_dev *dev,
-+ struct yaffs_block_info *bi);
-+void yaffs2_update_oldest_dirty_seq(struct yaffs_dev *dev, unsigned block_no,
-+ struct yaffs_block_info *bi);
-+int yaffs_block_ok_for_gc(struct yaffs_dev *dev, struct yaffs_block_info *bi);
-+u32 yaffs2_find_refresh_block(struct yaffs_dev *dev);
-+int yaffs2_checkpt_required(struct yaffs_dev *dev);
-+int yaffs_calc_checkpt_blocks_required(struct yaffs_dev *dev);
-+
-+void yaffs2_checkpt_invalidate(struct yaffs_dev *dev);
-+int yaffs2_checkpt_save(struct yaffs_dev *dev);
-+int yaffs2_checkpt_restore(struct yaffs_dev *dev);
-+
-+int yaffs2_handle_hole(struct yaffs_obj *obj, loff_t new_size);
-+int yaffs2_scan_backwards(struct yaffs_dev *dev);
-+
-+#endif
-diff -Nur linux-3.10.40.orig/fs/yaffs2/yportenv.h linux-3.10.40/fs/yaffs2/yportenv.h
---- linux-3.10.40.orig/fs/yaffs2/yportenv.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.10.40/fs/yaffs2/yportenv.h 2014-05-17 12:48:10.000000000 +0200
-@@ -0,0 +1,85 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YPORTENV_H__
-+#define __YPORTENV_H__
-+
-+/*
-+ * Define the MTD version in terms of Linux Kernel versions
-+ * This allows yaffs to be used independantly of the kernel
-+ * as well as with it.
-+ */
-+
-+#define MTD_VERSION(a, b, c) (((a) << 16) + ((b) << 8) + (c))
-+
-+#ifdef YAFFS_OUT_OF_TREE
-+#include "moduleconfig.h"
-+#endif
-+
-+#include <linux/version.h>
-+#define MTD_VERSION_CODE LINUX_VERSION_CODE
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
-+#include <linux/config.h>
-+#endif
-+#include <linux/version.h>
-+#include <linux/kernel.h>
-+#include <linux/mm.h>
-+#include <linux/sched.h>
-+#include <linux/string.h>
-+#include <linux/slab.h>
-+#include <linux/vmalloc.h>
-+#include <linux/xattr.h>
-+#include <linux/list.h>
-+#include <linux/types.h>
-+#include <linux/fs.h>
-+#include <linux/stat.h>
-+#include <linux/sort.h>
-+#include <linux/bitops.h>
-+
-+/* These type wrappings are used to support Unicode names in WinCE. */
-+#define YCHAR char
-+#define YUCHAR unsigned char
-+#define _Y(x) x
-+
-+#define YAFFS_LOSTNFOUND_NAME "lost+found"
-+#define YAFFS_LOSTNFOUND_PREFIX "obj"
-+
-+
-+#define YAFFS_ROOT_MODE 0755
-+#define YAFFS_LOSTNFOUND_MODE 0700
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+#define Y_CURRENT_TIME CURRENT_TIME.tv_sec
-+#define Y_TIME_CONVERT(x) (x).tv_sec
-+#else
-+#define Y_CURRENT_TIME CURRENT_TIME
-+#define Y_TIME_CONVERT(x) (x)
-+#endif
-+
-+#define compile_time_assertion(assertion) \
-+ ({ int x = __builtin_choose_expr(assertion, 0, (void)0); (void) x; })
-+
-+
-+#define yaffs_printf(msk, fmt, ...) \
-+ printk(KERN_DEBUG "yaffs: " fmt "\n", ##__VA_ARGS__)
-+
-+#define yaffs_trace(msk, fmt, ...) do { \
-+ if (yaffs_trace_mask & (msk)) \
-+ printk(KERN_DEBUG "yaffs: " fmt "\n", ##__VA_ARGS__); \
-+} while (0)
-+
-+
-+#endif
diff --git a/target/linux/patches/3.12.69/yaffs2.patch b/target/linux/patches/3.12.69/yaffs2.patch
deleted file mode 100644
index 306814439..000000000
--- a/target/linux/patches/3.12.69/yaffs2.patch
+++ /dev/null
@@ -1,16547 +0,0 @@
-diff -Nur linux-3.12.20.orig/fs/Kconfig linux-3.12.20/fs/Kconfig
---- linux-3.12.20.orig/fs/Kconfig 2014-05-15 09:56:19.000000000 +0200
-+++ linux-3.12.20/fs/Kconfig 2014-05-17 11:28:49.000000000 +0200
-@@ -193,6 +193,7 @@
- source "fs/befs/Kconfig"
- source "fs/bfs/Kconfig"
- source "fs/efs/Kconfig"
-+source "fs/yaffs2/Kconfig"
- source "fs/jffs2/Kconfig"
- # UBIFS File system configuration
- source "fs/ubifs/Kconfig"
-diff -Nur linux-3.12.20.orig/fs/Makefile linux-3.12.20/fs/Makefile
---- linux-3.12.20.orig/fs/Makefile 2014-05-15 09:56:19.000000000 +0200
-+++ linux-3.12.20/fs/Makefile 2014-05-17 11:28:49.000000000 +0200
-@@ -126,3 +126,4 @@
- obj-$(CONFIG_CEPH_FS) += ceph/
- obj-$(CONFIG_PSTORE) += pstore/
- obj-$(CONFIG_EFIVAR_FS) += efivarfs/
-+obj-$(CONFIG_YAFFS_FS) += yaffs2/
-diff -Nur linux-3.12.20.orig/fs/yaffs2/Kconfig linux-3.12.20/fs/yaffs2/Kconfig
---- linux-3.12.20.orig/fs/yaffs2/Kconfig 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/Kconfig 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,171 @@
-+#
-+# yaffs file system configurations
-+#
-+
-+config YAFFS_FS
-+ tristate "yaffs2 file system support"
-+ default n
-+ depends on MTD_BLOCK
-+ select YAFFS_YAFFS1
-+ select YAFFS_YAFFS2
-+ help
-+ yaffs2, or Yet Another Flash File System, is a file system
-+ optimised for NAND Flash chips.
-+
-+ To compile the yaffs2 file system support as a module, choose M
-+ here: the module will be called yaffs2.
-+
-+ If unsure, say N.
-+
-+ Further information on yaffs2 is available at
-+ <http://www.aleph1.co.uk/yaffs/>.
-+
-+config YAFFS_YAFFS1
-+ bool "512 byte / page devices"
-+ depends on YAFFS_FS
-+ default y
-+ help
-+ Enable yaffs1 support -- yaffs for 512 byte / page devices
-+
-+ Not needed for 2K-page devices.
-+
-+ If unsure, say Y.
-+
-+config YAFFS_9BYTE_TAGS
-+ bool "Use older-style on-NAND data format with pageStatus byte"
-+ depends on YAFFS_YAFFS1
-+ default n
-+ help
-+
-+ Older-style on-NAND data format has a "pageStatus" byte to record
-+ chunk/page state. This byte is zero when the page is discarded.
-+ Choose this option if you have existing on-NAND data using this
-+ format that you need to continue to support. New data written
-+ also uses the older-style format. Note: Use of this option
-+ generally requires that MTD's oob layout be adjusted to use the
-+ older-style format. See notes on tags formats and MTD versions
-+ in yaffs_mtdif1.c.
-+
-+ If unsure, say N.
-+
-+config YAFFS_DOES_ECC
-+ bool "Lets yaffs do its own ECC"
-+ depends on YAFFS_FS && YAFFS_YAFFS1 && !YAFFS_9BYTE_TAGS
-+ default n
-+ help
-+ This enables yaffs to use its own ECC functions instead of using
-+ the ones from the generic MTD-NAND driver.
-+
-+ If unsure, say N.
-+
-+config YAFFS_ECC_WRONG_ORDER
-+ bool "Use the same ecc byte order as Steven Hill's nand_ecc.c"
-+ depends on YAFFS_FS && YAFFS_DOES_ECC && !YAFFS_9BYTE_TAGS
-+ default n
-+ help
-+ This makes yaffs_ecc.c use the same ecc byte order as Steven
-+ Hill's nand_ecc.c. If not set, then you get the same ecc byte
-+ order as SmartMedia.
-+
-+ If unsure, say N.
-+
-+config YAFFS_YAFFS2
-+ bool "2048 byte (or larger) / page devices"
-+ depends on YAFFS_FS
-+ default y
-+ help
-+ Enable yaffs2 support -- yaffs for >= 2K bytes per page devices
-+
-+ If unsure, say Y.
-+
-+config YAFFS_AUTO_YAFFS2
-+ bool "Autoselect yaffs2 format"
-+ depends on YAFFS_YAFFS2
-+ default y
-+ help
-+ Without this, you need to explicitely use yaffs2 as the file
-+ system type. With this, you can say "yaffs" and yaffs or yaffs2
-+ will be used depending on the device page size (yaffs on
-+ 512-byte page devices, yaffs2 on 2K page devices).
-+
-+ If unsure, say Y.
-+
-+config YAFFS_DISABLE_TAGS_ECC
-+ bool "Disable yaffs from doing ECC on tags by default"
-+ depends on YAFFS_FS && YAFFS_YAFFS2
-+ default n
-+ help
-+ This defaults yaffs to using its own ECC calculations on tags instead of
-+ just relying on the MTD.
-+ This behavior can also be overridden with tags_ecc_on and
-+ tags_ecc_off mount options.
-+
-+ If unsure, say N.
-+
-+config YAFFS_ALWAYS_CHECK_CHUNK_ERASED
-+ bool "Force chunk erase check"
-+ depends on YAFFS_FS
-+ default n
-+ help
-+ Normally yaffs only checks chunks before writing until an erased
-+ chunk is found. This helps to detect any partially written
-+ chunks that might have happened due to power loss.
-+
-+ Enabling this forces on the test that chunks are erased in flash
-+ before writing to them. This takes more time but is potentially
-+ a bit more secure.
-+
-+ Suggest setting Y during development and ironing out driver
-+ issues etc. Suggest setting to N if you want faster writing.
-+
-+ If unsure, say Y.
-+
-+config YAFFS_EMPTY_LOST_AND_FOUND
-+ bool "Empty lost and found on boot"
-+ depends on YAFFS_FS
-+ default n
-+ help
-+ If this is enabled then the contents of lost and found is
-+ automatically dumped at mount.
-+
-+ If unsure, say N.
-+
-+config YAFFS_DISABLE_BLOCK_REFRESHING
-+ bool "Disable yaffs2 block refreshing"
-+ depends on YAFFS_FS
-+ default n
-+ help
-+ If this is set, then block refreshing is disabled.
-+ Block refreshing infrequently refreshes the oldest block in
-+ a yaffs2 file system. This mechanism helps to refresh flash to
-+ mitigate against data loss. This is particularly useful for MLC.
-+
-+ If unsure, say N.
-+
-+config YAFFS_DISABLE_BACKGROUND
-+ bool "Disable yaffs2 background processing"
-+ depends on YAFFS_FS
-+ default n
-+ help
-+ If this is set, then background processing is disabled.
-+ Background processing makes many foreground activities faster.
-+
-+ If unsure, say N.
-+
-+config YAFFS_DISABLE_BAD_BLOCK_MARKING
-+ bool "Disable yaffs2 bad block marking"
-+ depends on YAFFS_FS
-+ default n
-+ help
-+ Useful during early flash bring up to prevent problems causing
-+ lots of bad block marking.
-+
-+ If unsure, say N.
-+
-+config YAFFS_XATTR
-+ bool "Enable yaffs2 xattr support"
-+ depends on YAFFS_FS
-+ default y
-+ help
-+ If this is set then yaffs2 will provide xattr support.
-+ If unsure, say Y.
-diff -Nur linux-3.12.20.orig/fs/yaffs2/Makefile linux-3.12.20/fs/yaffs2/Makefile
---- linux-3.12.20.orig/fs/yaffs2/Makefile 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/Makefile 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,18 @@
-+#
-+# Makefile for the linux YAFFS filesystem routines.
-+#
-+
-+obj-$(CONFIG_YAFFS_FS) += yaffs.o
-+
-+yaffs-y := yaffs_ecc.o yaffs_vfs.o yaffs_guts.o yaffs_checkptrw.o
-+yaffs-y += yaffs_packedtags1.o yaffs_packedtags2.o yaffs_nand.o
-+yaffs-y += yaffs_tagscompat.o yaffs_tagsmarshall.o
-+yaffs-y += yaffs_mtdif.o
-+yaffs-y += yaffs_nameval.o yaffs_attribs.o
-+yaffs-y += yaffs_allocator.o
-+yaffs-y += yaffs_yaffs1.o
-+yaffs-y += yaffs_yaffs2.o
-+yaffs-y += yaffs_bitmap.o
-+yaffs-y += yaffs_summary.o
-+yaffs-y += yaffs_verify.o
-+
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_allocator.c linux-3.12.20/fs/yaffs2/yaffs_allocator.c
---- linux-3.12.20.orig/fs/yaffs2/yaffs_allocator.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_allocator.c 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,357 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_allocator.h"
-+#include "yaffs_guts.h"
-+#include "yaffs_trace.h"
-+#include "yportenv.h"
-+
-+/*
-+ * Each entry in yaffs_tnode_list and yaffs_obj_list hold blocks
-+ * of approx 100 objects that are themn allocated singly.
-+ * This is basically a simplified slab allocator.
-+ *
-+ * We don't use the Linux slab allocator because slab does not allow
-+ * us to dump all the objects in one hit when we do a umount and tear
-+ * down all the tnodes and objects. slab requires that we first free
-+ * the individual objects.
-+ *
-+ * Once yaffs has been mainlined I shall try to motivate for a change
-+ * to slab to provide the extra features we need here.
-+ */
-+
-+struct yaffs_tnode_list {
-+ struct yaffs_tnode_list *next;
-+ struct yaffs_tnode *tnodes;
-+};
-+
-+struct yaffs_obj_list {
-+ struct yaffs_obj_list *next;
-+ struct yaffs_obj *objects;
-+};
-+
-+struct yaffs_allocator {
-+ int n_tnodes_created;
-+ struct yaffs_tnode *free_tnodes;
-+ int n_free_tnodes;
-+ struct yaffs_tnode_list *alloc_tnode_list;
-+
-+ int n_obj_created;
-+ struct list_head free_objs;
-+ int n_free_objects;
-+
-+ struct yaffs_obj_list *allocated_obj_list;
-+};
-+
-+static void yaffs_deinit_raw_tnodes(struct yaffs_dev *dev)
-+{
-+ struct yaffs_allocator *allocator =
-+ (struct yaffs_allocator *)dev->allocator;
-+ struct yaffs_tnode_list *tmp;
-+
-+ if (!allocator) {
-+ BUG();
-+ return;
-+ }
-+
-+ while (allocator->alloc_tnode_list) {
-+ tmp = allocator->alloc_tnode_list->next;
-+
-+ kfree(allocator->alloc_tnode_list->tnodes);
-+ kfree(allocator->alloc_tnode_list);
-+ allocator->alloc_tnode_list = tmp;
-+ }
-+
-+ allocator->free_tnodes = NULL;
-+ allocator->n_free_tnodes = 0;
-+ allocator->n_tnodes_created = 0;
-+}
-+
-+static void yaffs_init_raw_tnodes(struct yaffs_dev *dev)
-+{
-+ struct yaffs_allocator *allocator = dev->allocator;
-+
-+ if (!allocator) {
-+ BUG();
-+ return;
-+ }
-+
-+ allocator->alloc_tnode_list = NULL;
-+ allocator->free_tnodes = NULL;
-+ allocator->n_free_tnodes = 0;
-+ allocator->n_tnodes_created = 0;
-+}
-+
-+static int yaffs_create_tnodes(struct yaffs_dev *dev, int n_tnodes)
-+{
-+ struct yaffs_allocator *allocator =
-+ (struct yaffs_allocator *)dev->allocator;
-+ int i;
-+ struct yaffs_tnode *new_tnodes;
-+ u8 *mem;
-+ struct yaffs_tnode *curr;
-+ struct yaffs_tnode *next;
-+ struct yaffs_tnode_list *tnl;
-+
-+ if (!allocator) {
-+ BUG();
-+ return YAFFS_FAIL;
-+ }
-+
-+ if (n_tnodes < 1)
-+ return YAFFS_OK;
-+
-+ /* make these things */
-+ new_tnodes = kmalloc(n_tnodes * dev->tnode_size, GFP_NOFS);
-+ mem = (u8 *) new_tnodes;
-+
-+ if (!new_tnodes) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs: Could not allocate Tnodes");
-+ return YAFFS_FAIL;
-+ }
-+
-+ /* New hookup for wide tnodes */
-+ for (i = 0; i < n_tnodes - 1; i++) {
-+ curr = (struct yaffs_tnode *)&mem[i * dev->tnode_size];
-+ next = (struct yaffs_tnode *)&mem[(i + 1) * dev->tnode_size];
-+ curr->internal[0] = next;
-+ }
-+
-+ curr = (struct yaffs_tnode *)&mem[(n_tnodes - 1) * dev->tnode_size];
-+ curr->internal[0] = allocator->free_tnodes;
-+ allocator->free_tnodes = (struct yaffs_tnode *)mem;
-+
-+ allocator->n_free_tnodes += n_tnodes;
-+ allocator->n_tnodes_created += n_tnodes;
-+
-+ /* Now add this bunch of tnodes to a list for freeing up.
-+ * NB If we can't add this to the management list it isn't fatal
-+ * but it just means we can't free this bunch of tnodes later.
-+ */
-+ tnl = kmalloc(sizeof(struct yaffs_tnode_list), GFP_NOFS);
-+ if (!tnl) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "Could not add tnodes to management list");
-+ return YAFFS_FAIL;
-+ } else {
-+ tnl->tnodes = new_tnodes;
-+ tnl->next = allocator->alloc_tnode_list;
-+ allocator->alloc_tnode_list = tnl;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_ALLOCATE, "Tnodes added");
-+
-+ return YAFFS_OK;
-+}
-+
-+struct yaffs_tnode *yaffs_alloc_raw_tnode(struct yaffs_dev *dev)
-+{
-+ struct yaffs_allocator *allocator =
-+ (struct yaffs_allocator *)dev->allocator;
-+ struct yaffs_tnode *tn = NULL;
-+
-+ if (!allocator) {
-+ BUG();
-+ return NULL;
-+ }
-+
-+ /* If there are none left make more */
-+ if (!allocator->free_tnodes)
-+ yaffs_create_tnodes(dev, YAFFS_ALLOCATION_NTNODES);
-+
-+ if (allocator->free_tnodes) {
-+ tn = allocator->free_tnodes;
-+ allocator->free_tnodes = allocator->free_tnodes->internal[0];
-+ allocator->n_free_tnodes--;
-+ }
-+
-+ return tn;
-+}
-+
-+/* FreeTnode frees up a tnode and puts it back on the free list */
-+void yaffs_free_raw_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn)
-+{
-+ struct yaffs_allocator *allocator = dev->allocator;
-+
-+ if (!allocator) {
-+ BUG();
-+ return;
-+ }
-+
-+ if (tn) {
-+ tn->internal[0] = allocator->free_tnodes;
-+ allocator->free_tnodes = tn;
-+ allocator->n_free_tnodes++;
-+ }
-+ dev->checkpoint_blocks_required = 0; /* force recalculation */
-+}
-+
-+/*--------------- yaffs_obj alloaction ------------------------
-+ *
-+ * Free yaffs_objs are stored in a list using obj->siblings.
-+ * The blocks of allocated objects are stored in a linked list.
-+ */
-+
-+static void yaffs_init_raw_objs(struct yaffs_dev *dev)
-+{
-+ struct yaffs_allocator *allocator = dev->allocator;
-+
-+ if (!allocator) {
-+ BUG();
-+ return;
-+ }
-+
-+ allocator->allocated_obj_list = NULL;
-+ INIT_LIST_HEAD(&allocator->free_objs);
-+ allocator->n_free_objects = 0;
-+}
-+
-+static void yaffs_deinit_raw_objs(struct yaffs_dev *dev)
-+{
-+ struct yaffs_allocator *allocator = dev->allocator;
-+ struct yaffs_obj_list *tmp;
-+
-+ if (!allocator) {
-+ BUG();
-+ return;
-+ }
-+
-+ while (allocator->allocated_obj_list) {
-+ tmp = allocator->allocated_obj_list->next;
-+ kfree(allocator->allocated_obj_list->objects);
-+ kfree(allocator->allocated_obj_list);
-+ allocator->allocated_obj_list = tmp;
-+ }
-+
-+ INIT_LIST_HEAD(&allocator->free_objs);
-+ allocator->n_free_objects = 0;
-+ allocator->n_obj_created = 0;
-+}
-+
-+static int yaffs_create_free_objs(struct yaffs_dev *dev, int n_obj)
-+{
-+ struct yaffs_allocator *allocator = dev->allocator;
-+ int i;
-+ struct yaffs_obj *new_objs;
-+ struct yaffs_obj_list *list;
-+
-+ if (!allocator) {
-+ BUG();
-+ return YAFFS_FAIL;
-+ }
-+
-+ if (n_obj < 1)
-+ return YAFFS_OK;
-+
-+ /* make these things */
-+ new_objs = kmalloc(n_obj * sizeof(struct yaffs_obj), GFP_NOFS);
-+ list = kmalloc(sizeof(struct yaffs_obj_list), GFP_NOFS);
-+
-+ if (!new_objs || !list) {
-+ kfree(new_objs);
-+ new_objs = NULL;
-+ kfree(list);
-+ list = NULL;
-+ yaffs_trace(YAFFS_TRACE_ALLOCATE,
-+ "Could not allocate more objects");
-+ return YAFFS_FAIL;
-+ }
-+
-+ /* Hook them into the free list */
-+ for (i = 0; i < n_obj; i++)
-+ list_add(&new_objs[i].siblings, &allocator->free_objs);
-+
-+ allocator->n_free_objects += n_obj;
-+ allocator->n_obj_created += n_obj;
-+
-+ /* Now add this bunch of Objects to a list for freeing up. */
-+
-+ list->objects = new_objs;
-+ list->next = allocator->allocated_obj_list;
-+ allocator->allocated_obj_list = list;
-+
-+ return YAFFS_OK;
-+}
-+
-+struct yaffs_obj *yaffs_alloc_raw_obj(struct yaffs_dev *dev)
-+{
-+ struct yaffs_obj *obj = NULL;
-+ struct list_head *lh;
-+ struct yaffs_allocator *allocator = dev->allocator;
-+
-+ if (!allocator) {
-+ BUG();
-+ return obj;
-+ }
-+
-+ /* If there are none left make more */
-+ if (list_empty(&allocator->free_objs))
-+ yaffs_create_free_objs(dev, YAFFS_ALLOCATION_NOBJECTS);
-+
-+ if (!list_empty(&allocator->free_objs)) {
-+ lh = allocator->free_objs.next;
-+ obj = list_entry(lh, struct yaffs_obj, siblings);
-+ list_del_init(lh);
-+ allocator->n_free_objects--;
-+ }
-+
-+ return obj;
-+}
-+
-+void yaffs_free_raw_obj(struct yaffs_dev *dev, struct yaffs_obj *obj)
-+{
-+
-+ struct yaffs_allocator *allocator = dev->allocator;
-+
-+ if (!allocator) {
-+ BUG();
-+ return;
-+ }
-+
-+ /* Link into the free list. */
-+ list_add(&obj->siblings, &allocator->free_objs);
-+ allocator->n_free_objects++;
-+}
-+
-+void yaffs_deinit_raw_tnodes_and_objs(struct yaffs_dev *dev)
-+{
-+
-+ if (!dev->allocator) {
-+ BUG();
-+ return;
-+ }
-+
-+ yaffs_deinit_raw_tnodes(dev);
-+ yaffs_deinit_raw_objs(dev);
-+ kfree(dev->allocator);
-+ dev->allocator = NULL;
-+}
-+
-+void yaffs_init_raw_tnodes_and_objs(struct yaffs_dev *dev)
-+{
-+ struct yaffs_allocator *allocator;
-+
-+ if (dev->allocator) {
-+ BUG();
-+ return;
-+ }
-+
-+ allocator = kmalloc(sizeof(struct yaffs_allocator), GFP_NOFS);
-+ if (allocator) {
-+ dev->allocator = allocator;
-+ yaffs_init_raw_tnodes(dev);
-+ yaffs_init_raw_objs(dev);
-+ }
-+}
-+
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_allocator.h linux-3.12.20/fs/yaffs2/yaffs_allocator.h
---- linux-3.12.20.orig/fs/yaffs2/yaffs_allocator.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_allocator.h 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,30 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_ALLOCATOR_H__
-+#define __YAFFS_ALLOCATOR_H__
-+
-+#include "yaffs_guts.h"
-+
-+void yaffs_init_raw_tnodes_and_objs(struct yaffs_dev *dev);
-+void yaffs_deinit_raw_tnodes_and_objs(struct yaffs_dev *dev);
-+
-+struct yaffs_tnode *yaffs_alloc_raw_tnode(struct yaffs_dev *dev);
-+void yaffs_free_raw_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn);
-+
-+struct yaffs_obj *yaffs_alloc_raw_obj(struct yaffs_dev *dev);
-+void yaffs_free_raw_obj(struct yaffs_dev *dev, struct yaffs_obj *obj);
-+
-+#endif
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_attribs.c linux-3.12.20/fs/yaffs2/yaffs_attribs.c
---- linux-3.12.20.orig/fs/yaffs2/yaffs_attribs.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_attribs.c 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,166 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_guts.h"
-+#include "yaffs_attribs.h"
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0))
-+static inline uid_t ia_uid_read(const struct iattr *iattr)
-+{
-+ return from_kuid(&init_user_ns, iattr->ia_uid);
-+}
-+
-+static inline gid_t ia_gid_read(const struct iattr *iattr)
-+{
-+ return from_kgid(&init_user_ns, iattr->ia_gid);
-+}
-+
-+static inline void ia_uid_write(struct iattr *iattr, uid_t uid)
-+{
-+ iattr->ia_uid = make_kuid(&init_user_ns, uid);
-+}
-+
-+static inline void ia_gid_write(struct iattr *iattr, gid_t gid)
-+{
-+ iattr->ia_gid = make_kgid(&init_user_ns, gid);
-+}
-+#else
-+static inline uid_t ia_uid_read(const struct iattr *iattr)
-+{
-+ return iattr->ia_uid;
-+}
-+
-+static inline gid_t ia_gid_read(const struct iattr *inode)
-+{
-+ return iattr->ia_gid;
-+}
-+
-+static inline void ia_uid_write(struct iattr *iattr, uid_t uid)
-+{
-+ iattr->ia_uid = uid;
-+}
-+
-+static inline void ia_gid_write(struct iattr *iattr, gid_t gid)
-+{
-+ iattr->ia_gid = gid;
-+}
-+#endif
-+
-+void yaffs_load_attribs(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh)
-+{
-+ obj->yst_uid = oh->yst_uid;
-+ obj->yst_gid = oh->yst_gid;
-+ obj->yst_atime = oh->yst_atime;
-+ obj->yst_mtime = oh->yst_mtime;
-+ obj->yst_ctime = oh->yst_ctime;
-+ obj->yst_rdev = oh->yst_rdev;
-+}
-+
-+void yaffs_load_attribs_oh(struct yaffs_obj_hdr *oh, struct yaffs_obj *obj)
-+{
-+ oh->yst_uid = obj->yst_uid;
-+ oh->yst_gid = obj->yst_gid;
-+ oh->yst_atime = obj->yst_atime;
-+ oh->yst_mtime = obj->yst_mtime;
-+ oh->yst_ctime = obj->yst_ctime;
-+ oh->yst_rdev = obj->yst_rdev;
-+
-+}
-+
-+void yaffs_load_current_time(struct yaffs_obj *obj, int do_a, int do_c)
-+{
-+ obj->yst_mtime = Y_CURRENT_TIME;
-+ if (do_a)
-+ obj->yst_atime = obj->yst_mtime;
-+ if (do_c)
-+ obj->yst_ctime = obj->yst_mtime;
-+}
-+
-+void yaffs_attribs_init(struct yaffs_obj *obj, u32 gid, u32 uid, u32 rdev)
-+{
-+ yaffs_load_current_time(obj, 1, 1);
-+ obj->yst_rdev = rdev;
-+ obj->yst_uid = uid;
-+ obj->yst_gid = gid;
-+}
-+
-+static loff_t yaffs_get_file_size(struct yaffs_obj *obj)
-+{
-+ YCHAR *alias = NULL;
-+ obj = yaffs_get_equivalent_obj(obj);
-+
-+ switch (obj->variant_type) {
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ return obj->variant.file_variant.file_size;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ alias = obj->variant.symlink_variant.alias;
-+ if (!alias)
-+ return 0;
-+ return strnlen(alias, YAFFS_MAX_ALIAS_LENGTH);
-+ default:
-+ return 0;
-+ }
-+}
-+
-+int yaffs_set_attribs(struct yaffs_obj *obj, struct iattr *attr)
-+{
-+ unsigned int valid = attr->ia_valid;
-+
-+ if (valid & ATTR_MODE)
-+ obj->yst_mode = attr->ia_mode;
-+ if (valid & ATTR_UID)
-+ obj->yst_uid = ia_uid_read(attr);
-+ if (valid & ATTR_GID)
-+ obj->yst_gid = ia_gid_read(attr);
-+
-+ if (valid & ATTR_ATIME)
-+ obj->yst_atime = Y_TIME_CONVERT(attr->ia_atime);
-+ if (valid & ATTR_CTIME)
-+ obj->yst_ctime = Y_TIME_CONVERT(attr->ia_ctime);
-+ if (valid & ATTR_MTIME)
-+ obj->yst_mtime = Y_TIME_CONVERT(attr->ia_mtime);
-+
-+ if (valid & ATTR_SIZE)
-+ yaffs_resize_file(obj, attr->ia_size);
-+
-+ yaffs_update_oh(obj, NULL, 1, 0, 0, NULL);
-+
-+ return YAFFS_OK;
-+
-+}
-+
-+int yaffs_get_attribs(struct yaffs_obj *obj, struct iattr *attr)
-+{
-+ unsigned int valid = 0;
-+
-+ attr->ia_mode = obj->yst_mode;
-+ valid |= ATTR_MODE;
-+ ia_uid_write(attr, obj->yst_uid);
-+ valid |= ATTR_UID;
-+ ia_gid_write(attr, obj->yst_gid);
-+ valid |= ATTR_GID;
-+
-+ Y_TIME_CONVERT(attr->ia_atime) = obj->yst_atime;
-+ valid |= ATTR_ATIME;
-+ Y_TIME_CONVERT(attr->ia_ctime) = obj->yst_ctime;
-+ valid |= ATTR_CTIME;
-+ Y_TIME_CONVERT(attr->ia_mtime) = obj->yst_mtime;
-+ valid |= ATTR_MTIME;
-+
-+ attr->ia_size = yaffs_get_file_size(obj);
-+ valid |= ATTR_SIZE;
-+
-+ attr->ia_valid = valid;
-+
-+ return YAFFS_OK;
-+}
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_attribs.h linux-3.12.20/fs/yaffs2/yaffs_attribs.h
---- linux-3.12.20.orig/fs/yaffs2/yaffs_attribs.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_attribs.h 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,28 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_ATTRIBS_H__
-+#define __YAFFS_ATTRIBS_H__
-+
-+#include "yaffs_guts.h"
-+
-+void yaffs_load_attribs(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh);
-+void yaffs_load_attribs_oh(struct yaffs_obj_hdr *oh, struct yaffs_obj *obj);
-+void yaffs_attribs_init(struct yaffs_obj *obj, u32 gid, u32 uid, u32 rdev);
-+void yaffs_load_current_time(struct yaffs_obj *obj, int do_a, int do_c);
-+int yaffs_set_attribs(struct yaffs_obj *obj, struct iattr *attr);
-+int yaffs_get_attribs(struct yaffs_obj *obj, struct iattr *attr);
-+
-+#endif
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_bitmap.c linux-3.12.20/fs/yaffs2/yaffs_bitmap.c
---- linux-3.12.20.orig/fs/yaffs2/yaffs_bitmap.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_bitmap.c 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,97 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_bitmap.h"
-+#include "yaffs_trace.h"
-+/*
-+ * Chunk bitmap manipulations
-+ */
-+
-+static inline u8 *yaffs_block_bits(struct yaffs_dev *dev, int blk)
-+{
-+ if (blk < dev->internal_start_block || blk > dev->internal_end_block) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "BlockBits block %d is not valid",
-+ blk);
-+ BUG();
-+ }
-+ return dev->chunk_bits +
-+ (dev->chunk_bit_stride * (blk - dev->internal_start_block));
-+}
-+
-+void yaffs_verify_chunk_bit_id(struct yaffs_dev *dev, int blk, int chunk)
-+{
-+ if (blk < dev->internal_start_block || blk > dev->internal_end_block ||
-+ chunk < 0 || chunk >= dev->param.chunks_per_block) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "Chunk Id (%d:%d) invalid",
-+ blk, chunk);
-+ BUG();
-+ }
-+}
-+
-+void yaffs_clear_chunk_bits(struct yaffs_dev *dev, int blk)
-+{
-+ u8 *blk_bits = yaffs_block_bits(dev, blk);
-+
-+ memset(blk_bits, 0, dev->chunk_bit_stride);
-+}
-+
-+void yaffs_clear_chunk_bit(struct yaffs_dev *dev, int blk, int chunk)
-+{
-+ u8 *blk_bits = yaffs_block_bits(dev, blk);
-+
-+ yaffs_verify_chunk_bit_id(dev, blk, chunk);
-+ blk_bits[chunk / 8] &= ~(1 << (chunk & 7));
-+}
-+
-+void yaffs_set_chunk_bit(struct yaffs_dev *dev, int blk, int chunk)
-+{
-+ u8 *blk_bits = yaffs_block_bits(dev, blk);
-+
-+ yaffs_verify_chunk_bit_id(dev, blk, chunk);
-+ blk_bits[chunk / 8] |= (1 << (chunk & 7));
-+}
-+
-+int yaffs_check_chunk_bit(struct yaffs_dev *dev, int blk, int chunk)
-+{
-+ u8 *blk_bits = yaffs_block_bits(dev, blk);
-+
-+ yaffs_verify_chunk_bit_id(dev, blk, chunk);
-+ return (blk_bits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0;
-+}
-+
-+int yaffs_still_some_chunks(struct yaffs_dev *dev, int blk)
-+{
-+ u8 *blk_bits = yaffs_block_bits(dev, blk);
-+ int i;
-+
-+ for (i = 0; i < dev->chunk_bit_stride; i++) {
-+ if (*blk_bits)
-+ return 1;
-+ blk_bits++;
-+ }
-+ return 0;
-+}
-+
-+int yaffs_count_chunk_bits(struct yaffs_dev *dev, int blk)
-+{
-+ u8 *blk_bits = yaffs_block_bits(dev, blk);
-+ int i;
-+ int n = 0;
-+
-+ for (i = 0; i < dev->chunk_bit_stride; i++, blk_bits++)
-+ n += hweight8(*blk_bits);
-+
-+ return n;
-+}
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_bitmap.h linux-3.12.20/fs/yaffs2/yaffs_bitmap.h
---- linux-3.12.20.orig/fs/yaffs2/yaffs_bitmap.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_bitmap.h 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,33 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+/*
-+ * Chunk bitmap manipulations
-+ */
-+
-+#ifndef __YAFFS_BITMAP_H__
-+#define __YAFFS_BITMAP_H__
-+
-+#include "yaffs_guts.h"
-+
-+void yaffs_verify_chunk_bit_id(struct yaffs_dev *dev, int blk, int chunk);
-+void yaffs_clear_chunk_bits(struct yaffs_dev *dev, int blk);
-+void yaffs_clear_chunk_bit(struct yaffs_dev *dev, int blk, int chunk);
-+void yaffs_set_chunk_bit(struct yaffs_dev *dev, int blk, int chunk);
-+int yaffs_check_chunk_bit(struct yaffs_dev *dev, int blk, int chunk);
-+int yaffs_still_some_chunks(struct yaffs_dev *dev, int blk);
-+int yaffs_count_chunk_bits(struct yaffs_dev *dev, int blk);
-+
-+#endif
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_checkptrw.c linux-3.12.20/fs/yaffs2/yaffs_checkptrw.c
---- linux-3.12.20.orig/fs/yaffs2/yaffs_checkptrw.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_checkptrw.c 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,474 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_checkptrw.h"
-+#include "yaffs_getblockinfo.h"
-+
-+struct yaffs_checkpt_chunk_hdr {
-+ int version;
-+ int seq;
-+ u32 sum;
-+ u32 xor;
-+} ;
-+
-+
-+static int apply_chunk_offset(struct yaffs_dev *dev, int chunk)
-+{
-+ return chunk - dev->chunk_offset;
-+}
-+
-+static int apply_block_offset(struct yaffs_dev *dev, int block)
-+{
-+ return block - dev->block_offset;
-+}
-+
-+static void yaffs2_checkpt_init_chunk_hdr(struct yaffs_dev *dev)
-+{
-+ struct yaffs_checkpt_chunk_hdr hdr;
-+
-+ hdr.version = YAFFS_CHECKPOINT_VERSION;
-+ hdr.seq = dev->checkpt_page_seq;
-+ hdr.sum = dev->checkpt_sum;
-+ hdr.xor = dev->checkpt_xor;
-+
-+ dev->checkpt_byte_offs = sizeof(hdr);
-+
-+ memcpy(dev->checkpt_buffer, &hdr, sizeof(hdr));
-+}
-+
-+static int yaffs2_checkpt_check_chunk_hdr(struct yaffs_dev *dev)
-+{
-+ struct yaffs_checkpt_chunk_hdr hdr;
-+
-+ memcpy(&hdr, dev->checkpt_buffer, sizeof(hdr));
-+
-+ dev->checkpt_byte_offs = sizeof(hdr);
-+
-+ return hdr.version == YAFFS_CHECKPOINT_VERSION &&
-+ hdr.seq == dev->checkpt_page_seq &&
-+ hdr.sum == dev->checkpt_sum &&
-+ hdr.xor == dev->checkpt_xor;
-+}
-+
-+static int yaffs2_checkpt_space_ok(struct yaffs_dev *dev)
-+{
-+ int blocks_avail = dev->n_erased_blocks - dev->param.n_reserved_blocks;
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "checkpt blocks_avail = %d", blocks_avail);
-+
-+ return (blocks_avail <= 0) ? 0 : 1;
-+}
-+
-+static int yaffs_checkpt_erase(struct yaffs_dev *dev)
-+{
-+ int i;
-+
-+ if (!dev->drv.drv_erase_fn)
-+ return 0;
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "checking blocks %d to %d",
-+ dev->internal_start_block, dev->internal_end_block);
-+
-+ for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, i);
-+ int offset_i = apply_block_offset(dev, i);
-+ int result;
-+
-+ if (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "erasing checkpt block %d", i);
-+
-+ dev->n_erasures++;
-+
-+ result = dev->drv.drv_erase_fn(dev, offset_i);
-+ if(result) {
-+ bi->block_state = YAFFS_BLOCK_STATE_EMPTY;
-+ dev->n_erased_blocks++;
-+ dev->n_free_chunks +=
-+ dev->param.chunks_per_block;
-+ } else {
-+ dev->drv.drv_mark_bad_fn(dev, offset_i);
-+ bi->block_state = YAFFS_BLOCK_STATE_DEAD;
-+ }
-+ }
-+ }
-+
-+ dev->blocks_in_checkpt = 0;
-+
-+ return 1;
-+}
-+
-+static void yaffs2_checkpt_find_erased_block(struct yaffs_dev *dev)
-+{
-+ int i;
-+ int blocks_avail = dev->n_erased_blocks - dev->param.n_reserved_blocks;
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "allocating checkpt block: erased %d reserved %d avail %d next %d ",
-+ dev->n_erased_blocks, dev->param.n_reserved_blocks,
-+ blocks_avail, dev->checkpt_next_block);
-+
-+ if (dev->checkpt_next_block >= 0 &&
-+ dev->checkpt_next_block <= dev->internal_end_block &&
-+ blocks_avail > 0) {
-+
-+ for (i = dev->checkpt_next_block; i <= dev->internal_end_block;
-+ i++) {
-+ struct yaffs_block_info *bi;
-+
-+ bi = yaffs_get_block_info(dev, i);
-+ if (bi->block_state == YAFFS_BLOCK_STATE_EMPTY) {
-+ dev->checkpt_next_block = i + 1;
-+ dev->checkpt_cur_block = i;
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "allocating checkpt block %d", i);
-+ return;
-+ }
-+ }
-+ }
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT, "out of checkpt blocks");
-+
-+ dev->checkpt_next_block = -1;
-+ dev->checkpt_cur_block = -1;
-+}
-+
-+static void yaffs2_checkpt_find_block(struct yaffs_dev *dev)
-+{
-+ int i;
-+ struct yaffs_ext_tags tags;
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "find next checkpt block: start: blocks %d next %d",
-+ dev->blocks_in_checkpt, dev->checkpt_next_block);
-+
-+ if (dev->blocks_in_checkpt < dev->checkpt_max_blocks)
-+ for (i = dev->checkpt_next_block; i <= dev->internal_end_block;
-+ i++) {
-+ int chunk = i * dev->param.chunks_per_block;
-+ enum yaffs_block_state state;
-+ u32 seq;
-+
-+ dev->tagger.read_chunk_tags_fn(dev,
-+ apply_chunk_offset(dev, chunk),
-+ NULL, &tags);
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "find next checkpt block: search: block %d state %d oid %d seq %d eccr %d",
-+ i, (int) state,
-+ tags.obj_id, tags.seq_number,
-+ tags.ecc_result);
-+
-+ if (tags.seq_number != YAFFS_SEQUENCE_CHECKPOINT_DATA)
-+ continue;
-+
-+ dev->tagger.query_block_fn(dev,
-+ apply_block_offset(dev, i),
-+ &state, &seq);
-+ if (state == YAFFS_BLOCK_STATE_DEAD)
-+ continue;
-+
-+ /* Right kind of block */
-+ dev->checkpt_next_block = tags.obj_id;
-+ dev->checkpt_cur_block = i;
-+ dev->checkpt_block_list[dev->blocks_in_checkpt] = i;
-+ dev->blocks_in_checkpt++;
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "found checkpt block %d", i);
-+ return;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT, "found no more checkpt blocks");
-+
-+ dev->checkpt_next_block = -1;
-+ dev->checkpt_cur_block = -1;
-+}
-+
-+int yaffs2_checkpt_open(struct yaffs_dev *dev, int writing)
-+{
-+ int i;
-+
-+ dev->checkpt_open_write = writing;
-+
-+ /* Got the functions we need? */
-+ if (!dev->tagger.write_chunk_tags_fn ||
-+ !dev->tagger.read_chunk_tags_fn ||
-+ !dev->drv.drv_erase_fn ||
-+ !dev->drv.drv_mark_bad_fn)
-+ return 0;
-+
-+ if (writing && !yaffs2_checkpt_space_ok(dev))
-+ return 0;
-+
-+ if (!dev->checkpt_buffer)
-+ dev->checkpt_buffer =
-+ kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS);
-+ if (!dev->checkpt_buffer)
-+ return 0;
-+
-+ dev->checkpt_page_seq = 0;
-+ dev->checkpt_byte_count = 0;
-+ dev->checkpt_sum = 0;
-+ dev->checkpt_xor = 0;
-+ dev->checkpt_cur_block = -1;
-+ dev->checkpt_cur_chunk = -1;
-+ dev->checkpt_next_block = dev->internal_start_block;
-+
-+ if (writing) {
-+ memset(dev->checkpt_buffer, 0, dev->data_bytes_per_chunk);
-+ yaffs2_checkpt_init_chunk_hdr(dev);
-+ return yaffs_checkpt_erase(dev);
-+ }
-+
-+ /* Opening for a read */
-+ /* Set to a value that will kick off a read */
-+ dev->checkpt_byte_offs = dev->data_bytes_per_chunk;
-+ /* A checkpoint block list of 1 checkpoint block per 16 block is
-+ * (hopefully) going to be way more than we need */
-+ dev->blocks_in_checkpt = 0;
-+ dev->checkpt_max_blocks =
-+ (dev->internal_end_block - dev->internal_start_block) / 16 + 2;
-+ dev->checkpt_block_list =
-+ kmalloc(sizeof(int) * dev->checkpt_max_blocks, GFP_NOFS);
-+
-+ if (!dev->checkpt_block_list)
-+ return 0;
-+
-+ for (i = 0; i < dev->checkpt_max_blocks; i++)
-+ dev->checkpt_block_list[i] = -1;
-+
-+ return 1;
-+}
-+
-+int yaffs2_get_checkpt_sum(struct yaffs_dev *dev, u32 * sum)
-+{
-+ u32 composite_sum;
-+
-+ composite_sum = (dev->checkpt_sum << 8) | (dev->checkpt_xor & 0xff);
-+ *sum = composite_sum;
-+ return 1;
-+}
-+
-+static int yaffs2_checkpt_flush_buffer(struct yaffs_dev *dev)
-+{
-+ int chunk;
-+ int offset_chunk;
-+ struct yaffs_ext_tags tags;
-+
-+ if (dev->checkpt_cur_block < 0) {
-+ yaffs2_checkpt_find_erased_block(dev);
-+ dev->checkpt_cur_chunk = 0;
-+ }
-+
-+ if (dev->checkpt_cur_block < 0)
-+ return 0;
-+
-+ tags.is_deleted = 0;
-+ tags.obj_id = dev->checkpt_next_block; /* Hint to next place to look */
-+ tags.chunk_id = dev->checkpt_page_seq + 1;
-+ tags.seq_number = YAFFS_SEQUENCE_CHECKPOINT_DATA;
-+ tags.n_bytes = dev->data_bytes_per_chunk;
-+ if (dev->checkpt_cur_chunk == 0) {
-+ /* First chunk we write for the block? Set block state to
-+ checkpoint */
-+ struct yaffs_block_info *bi =
-+ yaffs_get_block_info(dev, dev->checkpt_cur_block);
-+ bi->block_state = YAFFS_BLOCK_STATE_CHECKPOINT;
-+ dev->blocks_in_checkpt++;
-+ }
-+
-+ chunk =
-+ dev->checkpt_cur_block * dev->param.chunks_per_block +
-+ dev->checkpt_cur_chunk;
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "checkpoint wite buffer nand %d(%d:%d) objid %d chId %d",
-+ chunk, dev->checkpt_cur_block, dev->checkpt_cur_chunk,
-+ tags.obj_id, tags.chunk_id);
-+
-+ offset_chunk = apply_chunk_offset(dev, chunk);
-+
-+ dev->n_page_writes++;
-+
-+ dev->tagger.write_chunk_tags_fn(dev, offset_chunk,
-+ dev->checkpt_buffer, &tags);
-+ dev->checkpt_page_seq++;
-+ dev->checkpt_cur_chunk++;
-+ if (dev->checkpt_cur_chunk >= dev->param.chunks_per_block) {
-+ dev->checkpt_cur_chunk = 0;
-+ dev->checkpt_cur_block = -1;
-+ }
-+ memset(dev->checkpt_buffer, 0, dev->data_bytes_per_chunk);
-+
-+ yaffs2_checkpt_init_chunk_hdr(dev);
-+
-+
-+ return 1;
-+}
-+
-+int yaffs2_checkpt_wr(struct yaffs_dev *dev, const void *data, int n_bytes)
-+{
-+ int i = 0;
-+ int ok = 1;
-+ u8 *data_bytes = (u8 *) data;
-+
-+ if (!dev->checkpt_buffer)
-+ return 0;
-+
-+ if (!dev->checkpt_open_write)
-+ return -1;
-+
-+ while (i < n_bytes && ok) {
-+ dev->checkpt_buffer[dev->checkpt_byte_offs] = *data_bytes;
-+ dev->checkpt_sum += *data_bytes;
-+ dev->checkpt_xor ^= *data_bytes;
-+
-+ dev->checkpt_byte_offs++;
-+ i++;
-+ data_bytes++;
-+ dev->checkpt_byte_count++;
-+
-+ if (dev->checkpt_byte_offs < 0 ||
-+ dev->checkpt_byte_offs >= dev->data_bytes_per_chunk)
-+ ok = yaffs2_checkpt_flush_buffer(dev);
-+ }
-+
-+ return i;
-+}
-+
-+int yaffs2_checkpt_rd(struct yaffs_dev *dev, void *data, int n_bytes)
-+{
-+ int i = 0;
-+ int ok = 1;
-+ struct yaffs_ext_tags tags;
-+ int chunk;
-+ int offset_chunk;
-+ u8 *data_bytes = (u8 *) data;
-+
-+ if (!dev->checkpt_buffer)
-+ return 0;
-+
-+ if (dev->checkpt_open_write)
-+ return -1;
-+
-+ while (i < n_bytes && ok) {
-+
-+ if (dev->checkpt_byte_offs < 0 ||
-+ dev->checkpt_byte_offs >= dev->data_bytes_per_chunk) {
-+
-+ if (dev->checkpt_cur_block < 0) {
-+ yaffs2_checkpt_find_block(dev);
-+ dev->checkpt_cur_chunk = 0;
-+ }
-+
-+ if (dev->checkpt_cur_block < 0) {
-+ ok = 0;
-+ break;
-+ }
-+
-+ chunk = dev->checkpt_cur_block *
-+ dev->param.chunks_per_block +
-+ dev->checkpt_cur_chunk;
-+
-+ offset_chunk = apply_chunk_offset(dev, chunk);
-+ dev->n_page_reads++;
-+
-+ /* read in the next chunk */
-+ dev->tagger.read_chunk_tags_fn(dev,
-+ offset_chunk,
-+ dev->checkpt_buffer,
-+ &tags);
-+
-+ if (tags.chunk_id != (dev->checkpt_page_seq + 1) ||
-+ tags.ecc_result > YAFFS_ECC_RESULT_FIXED ||
-+ tags.seq_number != YAFFS_SEQUENCE_CHECKPOINT_DATA) {
-+ ok = 0;
-+ break;
-+ }
-+ if(!yaffs2_checkpt_check_chunk_hdr(dev)) {
-+ ok = 0;
-+ break;
-+ }
-+
-+ dev->checkpt_page_seq++;
-+ dev->checkpt_cur_chunk++;
-+
-+ if (dev->checkpt_cur_chunk >=
-+ dev->param.chunks_per_block)
-+ dev->checkpt_cur_block = -1;
-+
-+ }
-+
-+ *data_bytes = dev->checkpt_buffer[dev->checkpt_byte_offs];
-+ dev->checkpt_sum += *data_bytes;
-+ dev->checkpt_xor ^= *data_bytes;
-+ dev->checkpt_byte_offs++;
-+ i++;
-+ data_bytes++;
-+ dev->checkpt_byte_count++;
-+ }
-+
-+ return i;
-+}
-+
-+int yaffs_checkpt_close(struct yaffs_dev *dev)
-+{
-+ int i;
-+
-+ if (dev->checkpt_open_write) {
-+ if (dev->checkpt_byte_offs !=
-+ sizeof(sizeof(struct yaffs_checkpt_chunk_hdr)))
-+ yaffs2_checkpt_flush_buffer(dev);
-+ } else if (dev->checkpt_block_list) {
-+ for (i = 0;
-+ i < dev->blocks_in_checkpt &&
-+ dev->checkpt_block_list[i] >= 0; i++) {
-+ int blk = dev->checkpt_block_list[i];
-+ struct yaffs_block_info *bi = NULL;
-+
-+ if (dev->internal_start_block <= blk &&
-+ blk <= dev->internal_end_block)
-+ bi = yaffs_get_block_info(dev, blk);
-+ if (bi && bi->block_state == YAFFS_BLOCK_STATE_EMPTY)
-+ bi->block_state = YAFFS_BLOCK_STATE_CHECKPOINT;
-+ }
-+ kfree(dev->checkpt_block_list);
-+ dev->checkpt_block_list = NULL;
-+ }
-+
-+ dev->n_free_chunks -=
-+ dev->blocks_in_checkpt * dev->param.chunks_per_block;
-+ dev->n_erased_blocks -= dev->blocks_in_checkpt;
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT, "checkpoint byte count %d",
-+ dev->checkpt_byte_count);
-+
-+ if (dev->checkpt_buffer) {
-+ /* free the buffer */
-+ kfree(dev->checkpt_buffer);
-+ dev->checkpt_buffer = NULL;
-+ return 1;
-+ } else {
-+ return 0;
-+ }
-+}
-+
-+int yaffs2_checkpt_invalidate_stream(struct yaffs_dev *dev)
-+{
-+ /* Erase the checkpoint data */
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "checkpoint invalidate of %d blocks",
-+ dev->blocks_in_checkpt);
-+
-+ return yaffs_checkpt_erase(dev);
-+}
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_checkptrw.h linux-3.12.20/fs/yaffs2/yaffs_checkptrw.h
---- linux-3.12.20.orig/fs/yaffs2/yaffs_checkptrw.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_checkptrw.h 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,33 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_CHECKPTRW_H__
-+#define __YAFFS_CHECKPTRW_H__
-+
-+#include "yaffs_guts.h"
-+
-+int yaffs2_checkpt_open(struct yaffs_dev *dev, int writing);
-+
-+int yaffs2_checkpt_wr(struct yaffs_dev *dev, const void *data, int n_bytes);
-+
-+int yaffs2_checkpt_rd(struct yaffs_dev *dev, void *data, int n_bytes);
-+
-+int yaffs2_get_checkpt_sum(struct yaffs_dev *dev, u32 * sum);
-+
-+int yaffs_checkpt_close(struct yaffs_dev *dev);
-+
-+int yaffs2_checkpt_invalidate_stream(struct yaffs_dev *dev);
-+
-+#endif
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_ecc.c linux-3.12.20/fs/yaffs2/yaffs_ecc.c
---- linux-3.12.20.orig/fs/yaffs2/yaffs_ecc.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_ecc.c 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,281 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+/*
-+ * This code implements the ECC algorithm used in SmartMedia.
-+ *
-+ * The ECC comprises 22 bits of parity information and is stuffed into 3 bytes.
-+ * The two unused bit are set to 1.
-+ * The ECC can correct single bit errors in a 256-byte page of data. Thus, two
-+ * such ECC blocks are used on a 512-byte NAND page.
-+ *
-+ */
-+
-+#include "yportenv.h"
-+
-+#include "yaffs_ecc.h"
-+
-+/* Table generated by gen-ecc.c
-+ * Using a table means we do not have to calculate p1..p4 and p1'..p4'
-+ * for each byte of data. These are instead provided in a table in bits7..2.
-+ * Bit 0 of each entry indicates whether the entry has an odd or even parity,
-+ * and therefore this bytes influence on the line parity.
-+ */
-+
-+static const unsigned char column_parity_table[] = {
-+ 0x00, 0x55, 0x59, 0x0c, 0x65, 0x30, 0x3c, 0x69,
-+ 0x69, 0x3c, 0x30, 0x65, 0x0c, 0x59, 0x55, 0x00,
-+ 0x95, 0xc0, 0xcc, 0x99, 0xf0, 0xa5, 0xa9, 0xfc,
-+ 0xfc, 0xa9, 0xa5, 0xf0, 0x99, 0xcc, 0xc0, 0x95,
-+ 0x99, 0xcc, 0xc0, 0x95, 0xfc, 0xa9, 0xa5, 0xf0,
-+ 0xf0, 0xa5, 0xa9, 0xfc, 0x95, 0xc0, 0xcc, 0x99,
-+ 0x0c, 0x59, 0x55, 0x00, 0x69, 0x3c, 0x30, 0x65,
-+ 0x65, 0x30, 0x3c, 0x69, 0x00, 0x55, 0x59, 0x0c,
-+ 0xa5, 0xf0, 0xfc, 0xa9, 0xc0, 0x95, 0x99, 0xcc,
-+ 0xcc, 0x99, 0x95, 0xc0, 0xa9, 0xfc, 0xf0, 0xa5,
-+ 0x30, 0x65, 0x69, 0x3c, 0x55, 0x00, 0x0c, 0x59,
-+ 0x59, 0x0c, 0x00, 0x55, 0x3c, 0x69, 0x65, 0x30,
-+ 0x3c, 0x69, 0x65, 0x30, 0x59, 0x0c, 0x00, 0x55,
-+ 0x55, 0x00, 0x0c, 0x59, 0x30, 0x65, 0x69, 0x3c,
-+ 0xa9, 0xfc, 0xf0, 0xa5, 0xcc, 0x99, 0x95, 0xc0,
-+ 0xc0, 0x95, 0x99, 0xcc, 0xa5, 0xf0, 0xfc, 0xa9,
-+ 0xa9, 0xfc, 0xf0, 0xa5, 0xcc, 0x99, 0x95, 0xc0,
-+ 0xc0, 0x95, 0x99, 0xcc, 0xa5, 0xf0, 0xfc, 0xa9,
-+ 0x3c, 0x69, 0x65, 0x30, 0x59, 0x0c, 0x00, 0x55,
-+ 0x55, 0x00, 0x0c, 0x59, 0x30, 0x65, 0x69, 0x3c,
-+ 0x30, 0x65, 0x69, 0x3c, 0x55, 0x00, 0x0c, 0x59,
-+ 0x59, 0x0c, 0x00, 0x55, 0x3c, 0x69, 0x65, 0x30,
-+ 0xa5, 0xf0, 0xfc, 0xa9, 0xc0, 0x95, 0x99, 0xcc,
-+ 0xcc, 0x99, 0x95, 0xc0, 0xa9, 0xfc, 0xf0, 0xa5,
-+ 0x0c, 0x59, 0x55, 0x00, 0x69, 0x3c, 0x30, 0x65,
-+ 0x65, 0x30, 0x3c, 0x69, 0x00, 0x55, 0x59, 0x0c,
-+ 0x99, 0xcc, 0xc0, 0x95, 0xfc, 0xa9, 0xa5, 0xf0,
-+ 0xf0, 0xa5, 0xa9, 0xfc, 0x95, 0xc0, 0xcc, 0x99,
-+ 0x95, 0xc0, 0xcc, 0x99, 0xf0, 0xa5, 0xa9, 0xfc,
-+ 0xfc, 0xa9, 0xa5, 0xf0, 0x99, 0xcc, 0xc0, 0x95,
-+ 0x00, 0x55, 0x59, 0x0c, 0x65, 0x30, 0x3c, 0x69,
-+ 0x69, 0x3c, 0x30, 0x65, 0x0c, 0x59, 0x55, 0x00,
-+};
-+
-+
-+/* Calculate the ECC for a 256-byte block of data */
-+void yaffs_ecc_calc(const unsigned char *data, unsigned char *ecc)
-+{
-+ unsigned int i;
-+ unsigned char col_parity = 0;
-+ unsigned char line_parity = 0;
-+ unsigned char line_parity_prime = 0;
-+ unsigned char t;
-+ unsigned char b;
-+
-+ for (i = 0; i < 256; i++) {
-+ b = column_parity_table[*data++];
-+ col_parity ^= b;
-+
-+ if (b & 0x01) { /* odd number of bits in the byte */
-+ line_parity ^= i;
-+ line_parity_prime ^= ~i;
-+ }
-+ }
-+
-+ ecc[2] = (~col_parity) | 0x03;
-+
-+ t = 0;
-+ if (line_parity & 0x80)
-+ t |= 0x80;
-+ if (line_parity_prime & 0x80)
-+ t |= 0x40;
-+ if (line_parity & 0x40)
-+ t |= 0x20;
-+ if (line_parity_prime & 0x40)
-+ t |= 0x10;
-+ if (line_parity & 0x20)
-+ t |= 0x08;
-+ if (line_parity_prime & 0x20)
-+ t |= 0x04;
-+ if (line_parity & 0x10)
-+ t |= 0x02;
-+ if (line_parity_prime & 0x10)
-+ t |= 0x01;
-+ ecc[1] = ~t;
-+
-+ t = 0;
-+ if (line_parity & 0x08)
-+ t |= 0x80;
-+ if (line_parity_prime & 0x08)
-+ t |= 0x40;
-+ if (line_parity & 0x04)
-+ t |= 0x20;
-+ if (line_parity_prime & 0x04)
-+ t |= 0x10;
-+ if (line_parity & 0x02)
-+ t |= 0x08;
-+ if (line_parity_prime & 0x02)
-+ t |= 0x04;
-+ if (line_parity & 0x01)
-+ t |= 0x02;
-+ if (line_parity_prime & 0x01)
-+ t |= 0x01;
-+ ecc[0] = ~t;
-+
-+}
-+
-+/* Correct the ECC on a 256 byte block of data */
-+
-+int yaffs_ecc_correct(unsigned char *data, unsigned char *read_ecc,
-+ const unsigned char *test_ecc)
-+{
-+ unsigned char d0, d1, d2; /* deltas */
-+
-+ d0 = read_ecc[0] ^ test_ecc[0];
-+ d1 = read_ecc[1] ^ test_ecc[1];
-+ d2 = read_ecc[2] ^ test_ecc[2];
-+
-+ if ((d0 | d1 | d2) == 0)
-+ return 0; /* no error */
-+
-+ if (((d0 ^ (d0 >> 1)) & 0x55) == 0x55 &&
-+ ((d1 ^ (d1 >> 1)) & 0x55) == 0x55 &&
-+ ((d2 ^ (d2 >> 1)) & 0x54) == 0x54) {
-+ /* Single bit (recoverable) error in data */
-+
-+ unsigned byte;
-+ unsigned bit;
-+
-+ bit = byte = 0;
-+
-+ if (d1 & 0x80)
-+ byte |= 0x80;
-+ if (d1 & 0x20)
-+ byte |= 0x40;
-+ if (d1 & 0x08)
-+ byte |= 0x20;
-+ if (d1 & 0x02)
-+ byte |= 0x10;
-+ if (d0 & 0x80)
-+ byte |= 0x08;
-+ if (d0 & 0x20)
-+ byte |= 0x04;
-+ if (d0 & 0x08)
-+ byte |= 0x02;
-+ if (d0 & 0x02)
-+ byte |= 0x01;
-+
-+ if (d2 & 0x80)
-+ bit |= 0x04;
-+ if (d2 & 0x20)
-+ bit |= 0x02;
-+ if (d2 & 0x08)
-+ bit |= 0x01;
-+
-+ data[byte] ^= (1 << bit);
-+
-+ return 1; /* Corrected the error */
-+ }
-+
-+ if ((hweight8(d0) + hweight8(d1) + hweight8(d2)) == 1) {
-+ /* Reccoverable error in ecc */
-+
-+ read_ecc[0] = test_ecc[0];
-+ read_ecc[1] = test_ecc[1];
-+ read_ecc[2] = test_ecc[2];
-+
-+ return 1; /* Corrected the error */
-+ }
-+
-+ /* Unrecoverable error */
-+
-+ return -1;
-+
-+}
-+
-+/*
-+ * ECCxxxOther does ECC calcs on arbitrary n bytes of data
-+ */
-+void yaffs_ecc_calc_other(const unsigned char *data, unsigned n_bytes,
-+ struct yaffs_ecc_other *ecc_other)
-+{
-+ unsigned int i;
-+ unsigned char col_parity = 0;
-+ unsigned line_parity = 0;
-+ unsigned line_parity_prime = 0;
-+ unsigned char b;
-+
-+ for (i = 0; i < n_bytes; i++) {
-+ b = column_parity_table[*data++];
-+ col_parity ^= b;
-+
-+ if (b & 0x01) {
-+ /* odd number of bits in the byte */
-+ line_parity ^= i;
-+ line_parity_prime ^= ~i;
-+ }
-+
-+ }
-+
-+ ecc_other->col_parity = (col_parity >> 2) & 0x3f;
-+ ecc_other->line_parity = line_parity;
-+ ecc_other->line_parity_prime = line_parity_prime;
-+}
-+
-+int yaffs_ecc_correct_other(unsigned char *data, unsigned n_bytes,
-+ struct yaffs_ecc_other *read_ecc,
-+ const struct yaffs_ecc_other *test_ecc)
-+{
-+ unsigned char delta_col; /* column parity delta */
-+ unsigned delta_line; /* line parity delta */
-+ unsigned delta_line_prime; /* line parity delta */
-+ unsigned bit;
-+
-+ delta_col = read_ecc->col_parity ^ test_ecc->col_parity;
-+ delta_line = read_ecc->line_parity ^ test_ecc->line_parity;
-+ delta_line_prime =
-+ read_ecc->line_parity_prime ^ test_ecc->line_parity_prime;
-+
-+ if ((delta_col | delta_line | delta_line_prime) == 0)
-+ return 0; /* no error */
-+
-+ if (delta_line == ~delta_line_prime &&
-+ (((delta_col ^ (delta_col >> 1)) & 0x15) == 0x15)) {
-+ /* Single bit (recoverable) error in data */
-+
-+ bit = 0;
-+
-+ if (delta_col & 0x20)
-+ bit |= 0x04;
-+ if (delta_col & 0x08)
-+ bit |= 0x02;
-+ if (delta_col & 0x02)
-+ bit |= 0x01;
-+
-+ if (delta_line >= n_bytes)
-+ return -1;
-+
-+ data[delta_line] ^= (1 << bit);
-+
-+ return 1; /* corrected */
-+ }
-+
-+ if ((hweight32(delta_line) +
-+ hweight32(delta_line_prime) +
-+ hweight8(delta_col)) == 1) {
-+ /* Reccoverable error in ecc */
-+
-+ *read_ecc = *test_ecc;
-+ return 1; /* corrected */
-+ }
-+
-+ /* Unrecoverable error */
-+
-+ return -1;
-+}
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_ecc.h linux-3.12.20/fs/yaffs2/yaffs_ecc.h
---- linux-3.12.20.orig/fs/yaffs2/yaffs_ecc.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_ecc.h 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,44 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+/*
-+ * This code implements the ECC algorithm used in SmartMedia.
-+ *
-+ * The ECC comprises 22 bits of parity information and is stuffed into 3 bytes.
-+ * The two unused bit are set to 1.
-+ * The ECC can correct single bit errors in a 256-byte page of data.
-+ * Thus, two such ECC blocks are used on a 512-byte NAND page.
-+ *
-+ */
-+
-+#ifndef __YAFFS_ECC_H__
-+#define __YAFFS_ECC_H__
-+
-+struct yaffs_ecc_other {
-+ unsigned char col_parity;
-+ unsigned line_parity;
-+ unsigned line_parity_prime;
-+};
-+
-+void yaffs_ecc_calc(const unsigned char *data, unsigned char *ecc);
-+int yaffs_ecc_correct(unsigned char *data, unsigned char *read_ecc,
-+ const unsigned char *test_ecc);
-+
-+void yaffs_ecc_calc_other(const unsigned char *data, unsigned n_bytes,
-+ struct yaffs_ecc_other *ecc);
-+int yaffs_ecc_correct_other(unsigned char *data, unsigned n_bytes,
-+ struct yaffs_ecc_other *read_ecc,
-+ const struct yaffs_ecc_other *test_ecc);
-+#endif
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_getblockinfo.h linux-3.12.20/fs/yaffs2/yaffs_getblockinfo.h
---- linux-3.12.20.orig/fs/yaffs2/yaffs_getblockinfo.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_getblockinfo.h 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,35 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_GETBLOCKINFO_H__
-+#define __YAFFS_GETBLOCKINFO_H__
-+
-+#include "yaffs_guts.h"
-+#include "yaffs_trace.h"
-+
-+/* Function to manipulate block info */
-+static inline struct yaffs_block_info *yaffs_get_block_info(struct yaffs_dev
-+ *dev, int blk)
-+{
-+ if (blk < dev->internal_start_block || blk > dev->internal_end_block) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "**>> yaffs: get_block_info block %d is not valid",
-+ blk);
-+ BUG();
-+ }
-+ return &dev->block_info[blk - dev->internal_start_block];
-+}
-+
-+#endif
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_guts.c linux-3.12.20/fs/yaffs2/yaffs_guts.c
---- linux-3.12.20.orig/fs/yaffs2/yaffs_guts.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_guts.c 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,5146 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yportenv.h"
-+#include "yaffs_trace.h"
-+
-+#include "yaffs_guts.h"
-+#include "yaffs_getblockinfo.h"
-+#include "yaffs_tagscompat.h"
-+#include "yaffs_tagsmarshall.h"
-+#include "yaffs_nand.h"
-+#include "yaffs_yaffs1.h"
-+#include "yaffs_yaffs2.h"
-+#include "yaffs_bitmap.h"
-+#include "yaffs_verify.h"
-+#include "yaffs_nand.h"
-+#include "yaffs_packedtags2.h"
-+#include "yaffs_nameval.h"
-+#include "yaffs_allocator.h"
-+#include "yaffs_attribs.h"
-+#include "yaffs_summary.h"
-+
-+/* Note YAFFS_GC_GOOD_ENOUGH must be <= YAFFS_GC_PASSIVE_THRESHOLD */
-+#define YAFFS_GC_GOOD_ENOUGH 2
-+#define YAFFS_GC_PASSIVE_THRESHOLD 4
-+
-+#include "yaffs_ecc.h"
-+
-+/* Forward declarations */
-+
-+static int yaffs_wr_data_obj(struct yaffs_obj *in, int inode_chunk,
-+ const u8 *buffer, int n_bytes, int use_reserve);
-+
-+static void yaffs_fix_null_name(struct yaffs_obj *obj, YCHAR *name,
-+ int buffer_size);
-+
-+/* Function to calculate chunk and offset */
-+
-+void yaffs_addr_to_chunk(struct yaffs_dev *dev, loff_t addr,
-+ int *chunk_out, u32 *offset_out)
-+{
-+ int chunk;
-+ u32 offset;
-+
-+ chunk = (u32) (addr >> dev->chunk_shift);
-+
-+ if (dev->chunk_div == 1) {
-+ /* easy power of 2 case */
-+ offset = (u32) (addr & dev->chunk_mask);
-+ } else {
-+ /* Non power-of-2 case */
-+
-+ loff_t chunk_base;
-+
-+ chunk /= dev->chunk_div;
-+
-+ chunk_base = ((loff_t) chunk) * dev->data_bytes_per_chunk;
-+ offset = (u32) (addr - chunk_base);
-+ }
-+
-+ *chunk_out = chunk;
-+ *offset_out = offset;
-+}
-+
-+/* Function to return the number of shifts for a power of 2 greater than or
-+ * equal to the given number
-+ * Note we don't try to cater for all possible numbers and this does not have to
-+ * be hellishly efficient.
-+ */
-+
-+static inline u32 calc_shifts_ceiling(u32 x)
-+{
-+ int extra_bits;
-+ int shifts;
-+
-+ shifts = extra_bits = 0;
-+
-+ while (x > 1) {
-+ if (x & 1)
-+ extra_bits++;
-+ x >>= 1;
-+ shifts++;
-+ }
-+
-+ if (extra_bits)
-+ shifts++;
-+
-+ return shifts;
-+}
-+
-+/* Function to return the number of shifts to get a 1 in bit 0
-+ */
-+
-+static inline u32 calc_shifts(u32 x)
-+{
-+ u32 shifts;
-+
-+ shifts = 0;
-+
-+ if (!x)
-+ return 0;
-+
-+ while (!(x & 1)) {
-+ x >>= 1;
-+ shifts++;
-+ }
-+
-+ return shifts;
-+}
-+
-+/*
-+ * Temporary buffer manipulations.
-+ */
-+
-+static int yaffs_init_tmp_buffers(struct yaffs_dev *dev)
-+{
-+ int i;
-+ u8 *buf = (u8 *) 1;
-+
-+ memset(dev->temp_buffer, 0, sizeof(dev->temp_buffer));
-+
-+ for (i = 0; buf && i < YAFFS_N_TEMP_BUFFERS; i++) {
-+ dev->temp_buffer[i].in_use = 0;
-+ buf = kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS);
-+ dev->temp_buffer[i].buffer = buf;
-+ }
-+
-+ return buf ? YAFFS_OK : YAFFS_FAIL;
-+}
-+
-+u8 *yaffs_get_temp_buffer(struct yaffs_dev * dev)
-+{
-+ int i;
-+
-+ dev->temp_in_use++;
-+ if (dev->temp_in_use > dev->max_temp)
-+ dev->max_temp = dev->temp_in_use;
-+
-+ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
-+ if (dev->temp_buffer[i].in_use == 0) {
-+ dev->temp_buffer[i].in_use = 1;
-+ return dev->temp_buffer[i].buffer;
-+ }
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_BUFFERS, "Out of temp buffers");
-+ /*
-+ * If we got here then we have to allocate an unmanaged one
-+ * This is not good.
-+ */
-+
-+ dev->unmanaged_buffer_allocs++;
-+ return kmalloc(dev->data_bytes_per_chunk, GFP_NOFS);
-+
-+}
-+
-+void yaffs_release_temp_buffer(struct yaffs_dev *dev, u8 *buffer)
-+{
-+ int i;
-+
-+ dev->temp_in_use--;
-+
-+ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
-+ if (dev->temp_buffer[i].buffer == buffer) {
-+ dev->temp_buffer[i].in_use = 0;
-+ return;
-+ }
-+ }
-+
-+ if (buffer) {
-+ /* assume it is an unmanaged one. */
-+ yaffs_trace(YAFFS_TRACE_BUFFERS,
-+ "Releasing unmanaged temp buffer");
-+ kfree(buffer);
-+ dev->unmanaged_buffer_deallocs++;
-+ }
-+
-+}
-+
-+/*
-+ * Functions for robustisizing TODO
-+ *
-+ */
-+
-+static void yaffs_handle_chunk_wr_ok(struct yaffs_dev *dev, int nand_chunk,
-+ const u8 *data,
-+ const struct yaffs_ext_tags *tags)
-+{
-+ (void) dev;
-+ (void) nand_chunk;
-+ (void) data;
-+ (void) tags;
-+}
-+
-+static void yaffs_handle_chunk_update(struct yaffs_dev *dev, int nand_chunk,
-+ const struct yaffs_ext_tags *tags)
-+{
-+ (void) dev;
-+ (void) nand_chunk;
-+ (void) tags;
-+}
-+
-+void yaffs_handle_chunk_error(struct yaffs_dev *dev,
-+ struct yaffs_block_info *bi)
-+{
-+ if (!bi->gc_prioritise) {
-+ bi->gc_prioritise = 1;
-+ dev->has_pending_prioritised_gc = 1;
-+ bi->chunk_error_strikes++;
-+
-+ if (bi->chunk_error_strikes > 3) {
-+ bi->needs_retiring = 1; /* Too many stikes, so retire */
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs: Block struck out");
-+
-+ }
-+ }
-+}
-+
-+static void yaffs_handle_chunk_wr_error(struct yaffs_dev *dev, int nand_chunk,
-+ int erased_ok)
-+{
-+ int flash_block = nand_chunk / dev->param.chunks_per_block;
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, flash_block);
-+
-+ yaffs_handle_chunk_error(dev, bi);
-+
-+ if (erased_ok) {
-+ /* Was an actual write failure,
-+ * so mark the block for retirement.*/
-+ bi->needs_retiring = 1;
-+ yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
-+ "**>> Block %d needs retiring", flash_block);
-+ }
-+
-+ /* Delete the chunk */
-+ yaffs_chunk_del(dev, nand_chunk, 1, __LINE__);
-+ yaffs_skip_rest_of_block(dev);
-+}
-+
-+/*
-+ * Verification code
-+ */
-+
-+/*
-+ * Simple hash function. Needs to have a reasonable spread
-+ */
-+
-+static inline int yaffs_hash_fn(int n)
-+{
-+ if (n < 0)
-+ n = -n;
-+ return n % YAFFS_NOBJECT_BUCKETS;
-+}
-+
-+/*
-+ * Access functions to useful fake objects.
-+ * Note that root might have a presence in NAND if permissions are set.
-+ */
-+
-+struct yaffs_obj *yaffs_root(struct yaffs_dev *dev)
-+{
-+ return dev->root_dir;
-+}
-+
-+struct yaffs_obj *yaffs_lost_n_found(struct yaffs_dev *dev)
-+{
-+ return dev->lost_n_found;
-+}
-+
-+/*
-+ * Erased NAND checking functions
-+ */
-+
-+int yaffs_check_ff(u8 *buffer, int n_bytes)
-+{
-+ /* Horrible, slow implementation */
-+ while (n_bytes--) {
-+ if (*buffer != 0xff)
-+ return 0;
-+ buffer++;
-+ }
-+ return 1;
-+}
-+
-+static int yaffs_check_chunk_erased(struct yaffs_dev *dev, int nand_chunk)
-+{
-+ int retval = YAFFS_OK;
-+ u8 *data = yaffs_get_temp_buffer(dev);
-+ struct yaffs_ext_tags tags;
-+ int result;
-+
-+ result = yaffs_rd_chunk_tags_nand(dev, nand_chunk, data, &tags);
-+
-+ if (tags.ecc_result > YAFFS_ECC_RESULT_NO_ERROR)
-+ retval = YAFFS_FAIL;
-+
-+ if (!yaffs_check_ff(data, dev->data_bytes_per_chunk) ||
-+ tags.chunk_used) {
-+ yaffs_trace(YAFFS_TRACE_NANDACCESS,
-+ "Chunk %d not erased", nand_chunk);
-+ retval = YAFFS_FAIL;
-+ }
-+
-+ yaffs_release_temp_buffer(dev, data);
-+
-+ return retval;
-+
-+}
-+
-+static int yaffs_verify_chunk_written(struct yaffs_dev *dev,
-+ int nand_chunk,
-+ const u8 *data,
-+ struct yaffs_ext_tags *tags)
-+{
-+ int retval = YAFFS_OK;
-+ struct yaffs_ext_tags temp_tags;
-+ u8 *buffer = yaffs_get_temp_buffer(dev);
-+ int result;
-+
-+ result = yaffs_rd_chunk_tags_nand(dev, nand_chunk, buffer, &temp_tags);
-+ if (memcmp(buffer, data, dev->data_bytes_per_chunk) ||
-+ temp_tags.obj_id != tags->obj_id ||
-+ temp_tags.chunk_id != tags->chunk_id ||
-+ temp_tags.n_bytes != tags->n_bytes)
-+ retval = YAFFS_FAIL;
-+
-+ yaffs_release_temp_buffer(dev, buffer);
-+
-+ return retval;
-+}
-+
-+
-+int yaffs_check_alloc_available(struct yaffs_dev *dev, int n_chunks)
-+{
-+ int reserved_chunks;
-+ int reserved_blocks = dev->param.n_reserved_blocks;
-+ int checkpt_blocks;
-+
-+ checkpt_blocks = yaffs_calc_checkpt_blocks_required(dev);
-+
-+ reserved_chunks =
-+ (reserved_blocks + checkpt_blocks) * dev->param.chunks_per_block;
-+
-+ return (dev->n_free_chunks > (reserved_chunks + n_chunks));
-+}
-+
-+static int yaffs_find_alloc_block(struct yaffs_dev *dev)
-+{
-+ int i;
-+ struct yaffs_block_info *bi;
-+
-+ if (dev->n_erased_blocks < 1) {
-+ /* Hoosterman we've got a problem.
-+ * Can't get space to gc
-+ */
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs tragedy: no more erased blocks");
-+
-+ return -1;
-+ }
-+
-+ /* Find an empty block. */
-+
-+ for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
-+ dev->alloc_block_finder++;
-+ if (dev->alloc_block_finder < dev->internal_start_block
-+ || dev->alloc_block_finder > dev->internal_end_block) {
-+ dev->alloc_block_finder = dev->internal_start_block;
-+ }
-+
-+ bi = yaffs_get_block_info(dev, dev->alloc_block_finder);
-+
-+ if (bi->block_state == YAFFS_BLOCK_STATE_EMPTY) {
-+ bi->block_state = YAFFS_BLOCK_STATE_ALLOCATING;
-+ dev->seq_number++;
-+ bi->seq_number = dev->seq_number;
-+ dev->n_erased_blocks--;
-+ yaffs_trace(YAFFS_TRACE_ALLOCATE,
-+ "Allocated block %d, seq %d, %d left" ,
-+ dev->alloc_block_finder, dev->seq_number,
-+ dev->n_erased_blocks);
-+ return dev->alloc_block_finder;
-+ }
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs tragedy: no more erased blocks, but there should have been %d",
-+ dev->n_erased_blocks);
-+
-+ return -1;
-+}
-+
-+static int yaffs_alloc_chunk(struct yaffs_dev *dev, int use_reserver,
-+ struct yaffs_block_info **block_ptr)
-+{
-+ int ret_val;
-+ struct yaffs_block_info *bi;
-+
-+ if (dev->alloc_block < 0) {
-+ /* Get next block to allocate off */
-+ dev->alloc_block = yaffs_find_alloc_block(dev);
-+ dev->alloc_page = 0;
-+ }
-+
-+ if (!use_reserver && !yaffs_check_alloc_available(dev, 1)) {
-+ /* No space unless we're allowed to use the reserve. */
-+ return -1;
-+ }
-+
-+ if (dev->n_erased_blocks < dev->param.n_reserved_blocks
-+ && dev->alloc_page == 0)
-+ yaffs_trace(YAFFS_TRACE_ALLOCATE, "Allocating reserve");
-+
-+ /* Next page please.... */
-+ if (dev->alloc_block >= 0) {
-+ bi = yaffs_get_block_info(dev, dev->alloc_block);
-+
-+ ret_val = (dev->alloc_block * dev->param.chunks_per_block) +
-+ dev->alloc_page;
-+ bi->pages_in_use++;
-+ yaffs_set_chunk_bit(dev, dev->alloc_block, dev->alloc_page);
-+
-+ dev->alloc_page++;
-+
-+ dev->n_free_chunks--;
-+
-+ /* If the block is full set the state to full */
-+ if (dev->alloc_page >= dev->param.chunks_per_block) {
-+ bi->block_state = YAFFS_BLOCK_STATE_FULL;
-+ dev->alloc_block = -1;
-+ }
-+
-+ if (block_ptr)
-+ *block_ptr = bi;
-+
-+ return ret_val;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!");
-+
-+ return -1;
-+}
-+
-+static int yaffs_get_erased_chunks(struct yaffs_dev *dev)
-+{
-+ int n;
-+
-+ n = dev->n_erased_blocks * dev->param.chunks_per_block;
-+
-+ if (dev->alloc_block > 0)
-+ n += (dev->param.chunks_per_block - dev->alloc_page);
-+
-+ return n;
-+
-+}
-+
-+/*
-+ * yaffs_skip_rest_of_block() skips over the rest of the allocation block
-+ * if we don't want to write to it.
-+ */
-+void yaffs_skip_rest_of_block(struct yaffs_dev *dev)
-+{
-+ struct yaffs_block_info *bi;
-+
-+ if (dev->alloc_block > 0) {
-+ bi = yaffs_get_block_info(dev, dev->alloc_block);
-+ if (bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING) {
-+ bi->block_state = YAFFS_BLOCK_STATE_FULL;
-+ dev->alloc_block = -1;
-+ }
-+ }
-+}
-+
-+static int yaffs_write_new_chunk(struct yaffs_dev *dev,
-+ const u8 *data,
-+ struct yaffs_ext_tags *tags, int use_reserver)
-+{
-+ int attempts = 0;
-+ int write_ok = 0;
-+ int chunk;
-+
-+ yaffs2_checkpt_invalidate(dev);
-+
-+ do {
-+ struct yaffs_block_info *bi = 0;
-+ int erased_ok = 0;
-+
-+ chunk = yaffs_alloc_chunk(dev, use_reserver, &bi);
-+ if (chunk < 0) {
-+ /* no space */
-+ break;
-+ }
-+
-+ /* First check this chunk is erased, if it needs
-+ * checking. The checking policy (unless forced
-+ * always on) is as follows:
-+ *
-+ * Check the first page we try to write in a block.
-+ * If the check passes then we don't need to check any
-+ * more. If the check fails, we check again...
-+ * If the block has been erased, we don't need to check.
-+ *
-+ * However, if the block has been prioritised for gc,
-+ * then we think there might be something odd about
-+ * this block and stop using it.
-+ *
-+ * Rationale: We should only ever see chunks that have
-+ * not been erased if there was a partially written
-+ * chunk due to power loss. This checking policy should
-+ * catch that case with very few checks and thus save a
-+ * lot of checks that are most likely not needed.
-+ *
-+ * Mods to the above
-+ * If an erase check fails or the write fails we skip the
-+ * rest of the block.
-+ */
-+
-+ /* let's give it a try */
-+ attempts++;
-+
-+ if (dev->param.always_check_erased)
-+ bi->skip_erased_check = 0;
-+
-+ if (!bi->skip_erased_check) {
-+ erased_ok = yaffs_check_chunk_erased(dev, chunk);
-+ if (erased_ok != YAFFS_OK) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "**>> yaffs chunk %d was not erased",
-+ chunk);
-+
-+ /* If not erased, delete this one,
-+ * skip rest of block and
-+ * try another chunk */
-+ yaffs_chunk_del(dev, chunk, 1, __LINE__);
-+ yaffs_skip_rest_of_block(dev);
-+ continue;
-+ }
-+ }
-+
-+ write_ok = yaffs_wr_chunk_tags_nand(dev, chunk, data, tags);
-+
-+ if (!bi->skip_erased_check)
-+ write_ok =
-+ yaffs_verify_chunk_written(dev, chunk, data, tags);
-+
-+ if (write_ok != YAFFS_OK) {
-+ /* Clean up aborted write, skip to next block and
-+ * try another chunk */
-+ yaffs_handle_chunk_wr_error(dev, chunk, erased_ok);
-+ continue;
-+ }
-+
-+ bi->skip_erased_check = 1;
-+
-+ /* Copy the data into the robustification buffer */
-+ yaffs_handle_chunk_wr_ok(dev, chunk, data, tags);
-+
-+ } while (write_ok != YAFFS_OK &&
-+ (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts));
-+
-+ if (!write_ok)
-+ chunk = -1;
-+
-+ if (attempts > 1) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "**>> yaffs write required %d attempts",
-+ attempts);
-+ dev->n_retried_writes += (attempts - 1);
-+ }
-+
-+ return chunk;
-+}
-+
-+/*
-+ * Block retiring for handling a broken block.
-+ */
-+
-+static void yaffs_retire_block(struct yaffs_dev *dev, int flash_block)
-+{
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, flash_block);
-+
-+ yaffs2_checkpt_invalidate(dev);
-+
-+ yaffs2_clear_oldest_dirty_seq(dev, bi);
-+
-+ if (yaffs_mark_bad(dev, flash_block) != YAFFS_OK) {
-+ if (yaffs_erase_block(dev, flash_block) != YAFFS_OK) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs: Failed to mark bad and erase block %d",
-+ flash_block);
-+ } else {
-+ struct yaffs_ext_tags tags;
-+ int chunk_id =
-+ flash_block * dev->param.chunks_per_block;
-+
-+ u8 *buffer = yaffs_get_temp_buffer(dev);
-+
-+ memset(buffer, 0xff, dev->data_bytes_per_chunk);
-+ memset(&tags, 0, sizeof(tags));
-+ tags.seq_number = YAFFS_SEQUENCE_BAD_BLOCK;
-+ if (dev->tagger.write_chunk_tags_fn(dev, chunk_id -
-+ dev->chunk_offset,
-+ buffer,
-+ &tags) != YAFFS_OK)
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs: Failed to write bad block marker to block %d",
-+ flash_block);
-+
-+ yaffs_release_temp_buffer(dev, buffer);
-+ }
-+ }
-+
-+ bi->block_state = YAFFS_BLOCK_STATE_DEAD;
-+ bi->gc_prioritise = 0;
-+ bi->needs_retiring = 0;
-+
-+ dev->n_retired_blocks++;
-+}
-+
-+/*---------------- Name handling functions ------------*/
-+
-+static u16 yaffs_calc_name_sum(const YCHAR *name)
-+{
-+ u16 sum = 0;
-+ u16 i = 1;
-+
-+ if (!name)
-+ return 0;
-+
-+ while ((*name) && i < (YAFFS_MAX_NAME_LENGTH / 2)) {
-+
-+ /* 0x1f mask is case insensitive */
-+ sum += ((*name) & 0x1f) * i;
-+ i++;
-+ name++;
-+ }
-+ return sum;
-+}
-+
-+
-+void yaffs_set_obj_name(struct yaffs_obj *obj, const YCHAR * name)
-+{
-+ memset(obj->short_name, 0, sizeof(obj->short_name));
-+
-+ if (name && !name[0]) {
-+ yaffs_fix_null_name(obj, obj->short_name,
-+ YAFFS_SHORT_NAME_LENGTH);
-+ name = obj->short_name;
-+ } else if (name &&
-+ strnlen(name, YAFFS_SHORT_NAME_LENGTH + 1) <=
-+ YAFFS_SHORT_NAME_LENGTH) {
-+ strcpy(obj->short_name, name);
-+ }
-+
-+ obj->sum = yaffs_calc_name_sum(name);
-+}
-+
-+void yaffs_set_obj_name_from_oh(struct yaffs_obj *obj,
-+ const struct yaffs_obj_hdr *oh)
-+{
-+#ifdef CONFIG_YAFFS_AUTO_UNICODE
-+ YCHAR tmp_name[YAFFS_MAX_NAME_LENGTH + 1];
-+ memset(tmp_name, 0, sizeof(tmp_name));
-+ yaffs_load_name_from_oh(obj->my_dev, tmp_name, oh->name,
-+ YAFFS_MAX_NAME_LENGTH + 1);
-+ yaffs_set_obj_name(obj, tmp_name);
-+#else
-+ yaffs_set_obj_name(obj, oh->name);
-+#endif
-+}
-+
-+loff_t yaffs_max_file_size(struct yaffs_dev *dev)
-+{
-+ if(sizeof(loff_t) < 8)
-+ return YAFFS_MAX_FILE_SIZE_32;
-+ else
-+ return ((loff_t) YAFFS_MAX_CHUNK_ID) * dev->data_bytes_per_chunk;
-+}
-+
-+/*-------------------- TNODES -------------------
-+
-+ * List of spare tnodes
-+ * The list is hooked together using the first pointer
-+ * in the tnode.
-+ */
-+
-+struct yaffs_tnode *yaffs_get_tnode(struct yaffs_dev *dev)
-+{
-+ struct yaffs_tnode *tn = yaffs_alloc_raw_tnode(dev);
-+
-+ if (tn) {
-+ memset(tn, 0, dev->tnode_size);
-+ dev->n_tnodes++;
-+ }
-+
-+ dev->checkpoint_blocks_required = 0; /* force recalculation */
-+
-+ return tn;
-+}
-+
-+/* FreeTnode frees up a tnode and puts it back on the free list */
-+static void yaffs_free_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn)
-+{
-+ yaffs_free_raw_tnode(dev, tn);
-+ dev->n_tnodes--;
-+ dev->checkpoint_blocks_required = 0; /* force recalculation */
-+}
-+
-+static void yaffs_deinit_tnodes_and_objs(struct yaffs_dev *dev)
-+{
-+ yaffs_deinit_raw_tnodes_and_objs(dev);
-+ dev->n_obj = 0;
-+ dev->n_tnodes = 0;
-+}
-+
-+static void yaffs_load_tnode_0(struct yaffs_dev *dev, struct yaffs_tnode *tn,
-+ unsigned pos, unsigned val)
-+{
-+ u32 *map = (u32 *) tn;
-+ u32 bit_in_map;
-+ u32 bit_in_word;
-+ u32 word_in_map;
-+ u32 mask;
-+
-+ pos &= YAFFS_TNODES_LEVEL0_MASK;
-+ val >>= dev->chunk_grp_bits;
-+
-+ bit_in_map = pos * dev->tnode_width;
-+ word_in_map = bit_in_map / 32;
-+ bit_in_word = bit_in_map & (32 - 1);
-+
-+ mask = dev->tnode_mask << bit_in_word;
-+
-+ map[word_in_map] &= ~mask;
-+ map[word_in_map] |= (mask & (val << bit_in_word));
-+
-+ if (dev->tnode_width > (32 - bit_in_word)) {
-+ bit_in_word = (32 - bit_in_word);
-+ word_in_map++;
-+ mask =
-+ dev->tnode_mask >> bit_in_word;
-+ map[word_in_map] &= ~mask;
-+ map[word_in_map] |= (mask & (val >> bit_in_word));
-+ }
-+}
-+
-+u32 yaffs_get_group_base(struct yaffs_dev *dev, struct yaffs_tnode *tn,
-+ unsigned pos)
-+{
-+ u32 *map = (u32 *) tn;
-+ u32 bit_in_map;
-+ u32 bit_in_word;
-+ u32 word_in_map;
-+ u32 val;
-+
-+ pos &= YAFFS_TNODES_LEVEL0_MASK;
-+
-+ bit_in_map = pos * dev->tnode_width;
-+ word_in_map = bit_in_map / 32;
-+ bit_in_word = bit_in_map & (32 - 1);
-+
-+ val = map[word_in_map] >> bit_in_word;
-+
-+ if (dev->tnode_width > (32 - bit_in_word)) {
-+ bit_in_word = (32 - bit_in_word);
-+ word_in_map++;
-+ val |= (map[word_in_map] << bit_in_word);
-+ }
-+
-+ val &= dev->tnode_mask;
-+ val <<= dev->chunk_grp_bits;
-+
-+ return val;
-+}
-+
-+/* ------------------- End of individual tnode manipulation -----------------*/
-+
-+/* ---------Functions to manipulate the look-up tree (made up of tnodes) ------
-+ * The look up tree is represented by the top tnode and the number of top_level
-+ * in the tree. 0 means only the level 0 tnode is in the tree.
-+ */
-+
-+/* FindLevel0Tnode finds the level 0 tnode, if one exists. */
-+struct yaffs_tnode *yaffs_find_tnode_0(struct yaffs_dev *dev,
-+ struct yaffs_file_var *file_struct,
-+ u32 chunk_id)
-+{
-+ struct yaffs_tnode *tn = file_struct->top;
-+ u32 i;
-+ int required_depth;
-+ int level = file_struct->top_level;
-+
-+ (void) dev;
-+
-+ /* Check sane level and chunk Id */
-+ if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL)
-+ return NULL;
-+
-+ if (chunk_id > YAFFS_MAX_CHUNK_ID)
-+ return NULL;
-+
-+ /* First check we're tall enough (ie enough top_level) */
-+
-+ i = chunk_id >> YAFFS_TNODES_LEVEL0_BITS;
-+ required_depth = 0;
-+ while (i) {
-+ i >>= YAFFS_TNODES_INTERNAL_BITS;
-+ required_depth++;
-+ }
-+
-+ if (required_depth > file_struct->top_level)
-+ return NULL; /* Not tall enough, so we can't find it */
-+
-+ /* Traverse down to level 0 */
-+ while (level > 0 && tn) {
-+ tn = tn->internal[(chunk_id >>
-+ (YAFFS_TNODES_LEVEL0_BITS +
-+ (level - 1) *
-+ YAFFS_TNODES_INTERNAL_BITS)) &
-+ YAFFS_TNODES_INTERNAL_MASK];
-+ level--;
-+ }
-+
-+ return tn;
-+}
-+
-+/* add_find_tnode_0 finds the level 0 tnode if it exists,
-+ * otherwise first expands the tree.
-+ * This happens in two steps:
-+ * 1. If the tree isn't tall enough, then make it taller.
-+ * 2. Scan down the tree towards the level 0 tnode adding tnodes if required.
-+ *
-+ * Used when modifying the tree.
-+ *
-+ * If the tn argument is NULL, then a fresh tnode will be added otherwise the
-+ * specified tn will be plugged into the ttree.
-+ */
-+
-+struct yaffs_tnode *yaffs_add_find_tnode_0(struct yaffs_dev *dev,
-+ struct yaffs_file_var *file_struct,
-+ u32 chunk_id,
-+ struct yaffs_tnode *passed_tn)
-+{
-+ int required_depth;
-+ int i;
-+ int l;
-+ struct yaffs_tnode *tn;
-+ u32 x;
-+
-+ /* Check sane level and page Id */
-+ if (file_struct->top_level < 0 ||
-+ file_struct->top_level > YAFFS_TNODES_MAX_LEVEL)
-+ return NULL;
-+
-+ if (chunk_id > YAFFS_MAX_CHUNK_ID)
-+ return NULL;
-+
-+ /* First check we're tall enough (ie enough top_level) */
-+
-+ x = chunk_id >> YAFFS_TNODES_LEVEL0_BITS;
-+ required_depth = 0;
-+ while (x) {
-+ x >>= YAFFS_TNODES_INTERNAL_BITS;
-+ required_depth++;
-+ }
-+
-+ if (required_depth > file_struct->top_level) {
-+ /* Not tall enough, gotta make the tree taller */
-+ for (i = file_struct->top_level; i < required_depth; i++) {
-+
-+ tn = yaffs_get_tnode(dev);
-+
-+ if (tn) {
-+ tn->internal[0] = file_struct->top;
-+ file_struct->top = tn;
-+ file_struct->top_level++;
-+ } else {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs: no more tnodes");
-+ return NULL;
-+ }
-+ }
-+ }
-+
-+ /* Traverse down to level 0, adding anything we need */
-+
-+ l = file_struct->top_level;
-+ tn = file_struct->top;
-+
-+ if (l > 0) {
-+ while (l > 0 && tn) {
-+ x = (chunk_id >>
-+ (YAFFS_TNODES_LEVEL0_BITS +
-+ (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) &
-+ YAFFS_TNODES_INTERNAL_MASK;
-+
-+ if ((l > 1) && !tn->internal[x]) {
-+ /* Add missing non-level-zero tnode */
-+ tn->internal[x] = yaffs_get_tnode(dev);
-+ if (!tn->internal[x])
-+ return NULL;
-+ } else if (l == 1) {
-+ /* Looking from level 1 at level 0 */
-+ if (passed_tn) {
-+ /* If we already have one, release it */
-+ if (tn->internal[x])
-+ yaffs_free_tnode(dev,
-+ tn->internal[x]);
-+ tn->internal[x] = passed_tn;
-+
-+ } else if (!tn->internal[x]) {
-+ /* Don't have one, none passed in */
-+ tn->internal[x] = yaffs_get_tnode(dev);
-+ if (!tn->internal[x])
-+ return NULL;
-+ }
-+ }
-+
-+ tn = tn->internal[x];
-+ l--;
-+ }
-+ } else {
-+ /* top is level 0 */
-+ if (passed_tn) {
-+ memcpy(tn, passed_tn,
-+ (dev->tnode_width * YAFFS_NTNODES_LEVEL0) / 8);
-+ yaffs_free_tnode(dev, passed_tn);
-+ }
-+ }
-+
-+ return tn;
-+}
-+
-+static int yaffs_tags_match(const struct yaffs_ext_tags *tags, int obj_id,
-+ int chunk_obj)
-+{
-+ return (tags->chunk_id == chunk_obj &&
-+ tags->obj_id == obj_id &&
-+ !tags->is_deleted) ? 1 : 0;
-+
-+}
-+
-+static int yaffs_find_chunk_in_group(struct yaffs_dev *dev, int the_chunk,
-+ struct yaffs_ext_tags *tags, int obj_id,
-+ int inode_chunk)
-+{
-+ int j;
-+
-+ for (j = 0; the_chunk && j < dev->chunk_grp_size; j++) {
-+ if (yaffs_check_chunk_bit
-+ (dev, the_chunk / dev->param.chunks_per_block,
-+ the_chunk % dev->param.chunks_per_block)) {
-+
-+ if (dev->chunk_grp_size == 1)
-+ return the_chunk;
-+ else {
-+ yaffs_rd_chunk_tags_nand(dev, the_chunk, NULL,
-+ tags);
-+ if (yaffs_tags_match(tags,
-+ obj_id, inode_chunk)) {
-+ /* found it; */
-+ return the_chunk;
-+ }
-+ }
-+ }
-+ the_chunk++;
-+ }
-+ return -1;
-+}
-+
-+int yaffs_find_chunk_in_file(struct yaffs_obj *in, int inode_chunk,
-+ struct yaffs_ext_tags *tags)
-+{
-+ /*Get the Tnode, then get the level 0 offset chunk offset */
-+ struct yaffs_tnode *tn;
-+ int the_chunk = -1;
-+ struct yaffs_ext_tags local_tags;
-+ int ret_val = -1;
-+ struct yaffs_dev *dev = in->my_dev;
-+
-+ if (!tags) {
-+ /* Passed a NULL, so use our own tags space */
-+ tags = &local_tags;
-+ }
-+
-+ tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk);
-+
-+ if (!tn)
-+ return ret_val;
-+
-+ the_chunk = yaffs_get_group_base(dev, tn, inode_chunk);
-+
-+ ret_val = yaffs_find_chunk_in_group(dev, the_chunk, tags, in->obj_id,
-+ inode_chunk);
-+ return ret_val;
-+}
-+
-+static int yaffs_find_del_file_chunk(struct yaffs_obj *in, int inode_chunk,
-+ struct yaffs_ext_tags *tags)
-+{
-+ /* Get the Tnode, then get the level 0 offset chunk offset */
-+ struct yaffs_tnode *tn;
-+ int the_chunk = -1;
-+ struct yaffs_ext_tags local_tags;
-+ struct yaffs_dev *dev = in->my_dev;
-+ int ret_val = -1;
-+
-+ if (!tags) {
-+ /* Passed a NULL, so use our own tags space */
-+ tags = &local_tags;
-+ }
-+
-+ tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk);
-+
-+ if (!tn)
-+ return ret_val;
-+
-+ the_chunk = yaffs_get_group_base(dev, tn, inode_chunk);
-+
-+ ret_val = yaffs_find_chunk_in_group(dev, the_chunk, tags, in->obj_id,
-+ inode_chunk);
-+
-+ /* Delete the entry in the filestructure (if found) */
-+ if (ret_val != -1)
-+ yaffs_load_tnode_0(dev, tn, inode_chunk, 0);
-+
-+ return ret_val;
-+}
-+
-+int yaffs_put_chunk_in_file(struct yaffs_obj *in, int inode_chunk,
-+ int nand_chunk, int in_scan)
-+{
-+ /* NB in_scan is zero unless scanning.
-+ * For forward scanning, in_scan is > 0;
-+ * for backward scanning in_scan is < 0
-+ *
-+ * nand_chunk = 0 is a dummy insert to make sure the tnodes are there.
-+ */
-+
-+ struct yaffs_tnode *tn;
-+ struct yaffs_dev *dev = in->my_dev;
-+ int existing_cunk;
-+ struct yaffs_ext_tags existing_tags;
-+ struct yaffs_ext_tags new_tags;
-+ unsigned existing_serial, new_serial;
-+
-+ if (in->variant_type != YAFFS_OBJECT_TYPE_FILE) {
-+ /* Just ignore an attempt at putting a chunk into a non-file
-+ * during scanning.
-+ * If it is not during Scanning then something went wrong!
-+ */
-+ if (!in_scan) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs tragedy:attempt to put data chunk into a non-file"
-+ );
-+ BUG();
-+ }
-+
-+ yaffs_chunk_del(dev, nand_chunk, 1, __LINE__);
-+ return YAFFS_OK;
-+ }
-+
-+ tn = yaffs_add_find_tnode_0(dev,
-+ &in->variant.file_variant,
-+ inode_chunk, NULL);
-+ if (!tn)
-+ return YAFFS_FAIL;
-+
-+ if (!nand_chunk)
-+ /* Dummy insert, bail now */
-+ return YAFFS_OK;
-+
-+ existing_cunk = yaffs_get_group_base(dev, tn, inode_chunk);
-+
-+ if (in_scan != 0) {
-+ /* If we're scanning then we need to test for duplicates
-+ * NB This does not need to be efficient since it should only
-+ * happen when the power fails during a write, then only one
-+ * chunk should ever be affected.
-+ *
-+ * Correction for YAFFS2: This could happen quite a lot and we
-+ * need to think about efficiency! TODO
-+ * Update: For backward scanning we don't need to re-read tags
-+ * so this is quite cheap.
-+ */
-+
-+ if (existing_cunk > 0) {
-+ /* NB Right now existing chunk will not be real
-+ * chunk_id if the chunk group size > 1
-+ * thus we have to do a FindChunkInFile to get the
-+ * real chunk id.
-+ *
-+ * We have a duplicate now we need to decide which
-+ * one to use:
-+ *
-+ * Backwards scanning YAFFS2: The old one is what
-+ * we use, dump the new one.
-+ * YAFFS1: Get both sets of tags and compare serial
-+ * numbers.
-+ */
-+
-+ if (in_scan > 0) {
-+ /* Only do this for forward scanning */
-+ yaffs_rd_chunk_tags_nand(dev,
-+ nand_chunk,
-+ NULL, &new_tags);
-+
-+ /* Do a proper find */
-+ existing_cunk =
-+ yaffs_find_chunk_in_file(in, inode_chunk,
-+ &existing_tags);
-+ }
-+
-+ if (existing_cunk <= 0) {
-+ /*Hoosterman - how did this happen? */
-+
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs tragedy: existing chunk < 0 in scan"
-+ );
-+
-+ }
-+
-+ /* NB The deleted flags should be false, otherwise
-+ * the chunks will not be loaded during a scan
-+ */
-+
-+ if (in_scan > 0) {
-+ new_serial = new_tags.serial_number;
-+ existing_serial = existing_tags.serial_number;
-+ }
-+
-+ if ((in_scan > 0) &&
-+ (existing_cunk <= 0 ||
-+ ((existing_serial + 1) & 3) == new_serial)) {
-+ /* Forward scanning.
-+ * Use new
-+ * Delete the old one and drop through to
-+ * update the tnode
-+ */
-+ yaffs_chunk_del(dev, existing_cunk, 1,
-+ __LINE__);
-+ } else {
-+ /* Backward scanning or we want to use the
-+ * existing one
-+ * Delete the new one and return early so that
-+ * the tnode isn't changed
-+ */
-+ yaffs_chunk_del(dev, nand_chunk, 1, __LINE__);
-+ return YAFFS_OK;
-+ }
-+ }
-+
-+ }
-+
-+ if (existing_cunk == 0)
-+ in->n_data_chunks++;
-+
-+ yaffs_load_tnode_0(dev, tn, inode_chunk, nand_chunk);
-+
-+ return YAFFS_OK;
-+}
-+
-+static void yaffs_soft_del_chunk(struct yaffs_dev *dev, int chunk)
-+{
-+ struct yaffs_block_info *the_block;
-+ unsigned block_no;
-+
-+ yaffs_trace(YAFFS_TRACE_DELETION, "soft delete chunk %d", chunk);
-+
-+ block_no = chunk / dev->param.chunks_per_block;
-+ the_block = yaffs_get_block_info(dev, block_no);
-+ if (the_block) {
-+ the_block->soft_del_pages++;
-+ dev->n_free_chunks++;
-+ yaffs2_update_oldest_dirty_seq(dev, block_no, the_block);
-+ }
-+}
-+
-+/* SoftDeleteWorker scans backwards through the tnode tree and soft deletes all
-+ * the chunks in the file.
-+ * All soft deleting does is increment the block's softdelete count and pulls
-+ * the chunk out of the tnode.
-+ * Thus, essentially this is the same as DeleteWorker except that the chunks
-+ * are soft deleted.
-+ */
-+
-+static int yaffs_soft_del_worker(struct yaffs_obj *in, struct yaffs_tnode *tn,
-+ u32 level, int chunk_offset)
-+{
-+ int i;
-+ int the_chunk;
-+ int all_done = 1;
-+ struct yaffs_dev *dev = in->my_dev;
-+
-+ if (!tn)
-+ return 1;
-+
-+ if (level > 0) {
-+ for (i = YAFFS_NTNODES_INTERNAL - 1;
-+ all_done && i >= 0;
-+ i--) {
-+ if (tn->internal[i]) {
-+ all_done =
-+ yaffs_soft_del_worker(in,
-+ tn->internal[i],
-+ level - 1,
-+ (chunk_offset <<
-+ YAFFS_TNODES_INTERNAL_BITS)
-+ + i);
-+ if (all_done) {
-+ yaffs_free_tnode(dev,
-+ tn->internal[i]);
-+ tn->internal[i] = NULL;
-+ } else {
-+ /* Can this happen? */
-+ }
-+ }
-+ }
-+ return (all_done) ? 1 : 0;
-+ }
-+
-+ /* level 0 */
-+ for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) {
-+ the_chunk = yaffs_get_group_base(dev, tn, i);
-+ if (the_chunk) {
-+ yaffs_soft_del_chunk(dev, the_chunk);
-+ yaffs_load_tnode_0(dev, tn, i, 0);
-+ }
-+ }
-+ return 1;
-+}
-+
-+static void yaffs_remove_obj_from_dir(struct yaffs_obj *obj)
-+{
-+ struct yaffs_dev *dev = obj->my_dev;
-+ struct yaffs_obj *parent;
-+
-+ yaffs_verify_obj_in_dir(obj);
-+ parent = obj->parent;
-+
-+ yaffs_verify_dir(parent);
-+
-+ if (dev && dev->param.remove_obj_fn)
-+ dev->param.remove_obj_fn(obj);
-+
-+ list_del_init(&obj->siblings);
-+ obj->parent = NULL;
-+
-+ yaffs_verify_dir(parent);
-+}
-+
-+void yaffs_add_obj_to_dir(struct yaffs_obj *directory, struct yaffs_obj *obj)
-+{
-+ if (!directory) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "tragedy: Trying to add an object to a null pointer directory"
-+ );
-+ BUG();
-+ return;
-+ }
-+ if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "tragedy: Trying to add an object to a non-directory"
-+ );
-+ BUG();
-+ }
-+
-+ if (obj->siblings.prev == NULL) {
-+ /* Not initialised */
-+ BUG();
-+ }
-+
-+ yaffs_verify_dir(directory);
-+
-+ yaffs_remove_obj_from_dir(obj);
-+
-+ /* Now add it */
-+ list_add(&obj->siblings, &directory->variant.dir_variant.children);
-+ obj->parent = directory;
-+
-+ if (directory == obj->my_dev->unlinked_dir
-+ || directory == obj->my_dev->del_dir) {
-+ obj->unlinked = 1;
-+ obj->my_dev->n_unlinked_files++;
-+ obj->rename_allowed = 0;
-+ }
-+
-+ yaffs_verify_dir(directory);
-+ yaffs_verify_obj_in_dir(obj);
-+}
-+
-+static int yaffs_change_obj_name(struct yaffs_obj *obj,
-+ struct yaffs_obj *new_dir,
-+ const YCHAR *new_name, int force, int shadows)
-+{
-+ int unlink_op;
-+ int del_op;
-+ struct yaffs_obj *existing_target;
-+
-+ if (new_dir == NULL)
-+ new_dir = obj->parent; /* use the old directory */
-+
-+ if (new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "tragedy: yaffs_change_obj_name: new_dir is not a directory"
-+ );
-+ BUG();
-+ }
-+
-+ unlink_op = (new_dir == obj->my_dev->unlinked_dir);
-+ del_op = (new_dir == obj->my_dev->del_dir);
-+
-+ existing_target = yaffs_find_by_name(new_dir, new_name);
-+
-+ /* If the object is a file going into the unlinked directory,
-+ * then it is OK to just stuff it in since duplicate names are OK.
-+ * else only proceed if the new name does not exist and we're putting
-+ * it into a directory.
-+ */
-+ if (!(unlink_op || del_op || force ||
-+ shadows > 0 || !existing_target) ||
-+ new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
-+ return YAFFS_FAIL;
-+
-+ yaffs_set_obj_name(obj, new_name);
-+ obj->dirty = 1;
-+ yaffs_add_obj_to_dir(new_dir, obj);
-+
-+ if (unlink_op)
-+ obj->unlinked = 1;
-+
-+ /* If it is a deletion then we mark it as a shrink for gc */
-+ if (yaffs_update_oh(obj, new_name, 0, del_op, shadows, NULL) >= 0)
-+ return YAFFS_OK;
-+
-+ return YAFFS_FAIL;
-+}
-+
-+/*------------------------ Short Operations Cache ------------------------------
-+ * In many situations where there is no high level buffering a lot of
-+ * reads might be short sequential reads, and a lot of writes may be short
-+ * sequential writes. eg. scanning/writing a jpeg file.
-+ * In these cases, a short read/write cache can provide a huge perfomance
-+ * benefit with dumb-as-a-rock code.
-+ * In Linux, the page cache provides read buffering and the short op cache
-+ * provides write buffering.
-+ *
-+ * There are a small number (~10) of cache chunks per device so that we don't
-+ * need a very intelligent search.
-+ */
-+
-+static int yaffs_obj_cache_dirty(struct yaffs_obj *obj)
-+{
-+ struct yaffs_dev *dev = obj->my_dev;
-+ int i;
-+ struct yaffs_cache *cache;
-+ int n_caches = obj->my_dev->param.n_caches;
-+
-+ for (i = 0; i < n_caches; i++) {
-+ cache = &dev->cache[i];
-+ if (cache->object == obj && cache->dirty)
-+ return 1;
-+ }
-+
-+ return 0;
-+}
-+
-+static void yaffs_flush_file_cache(struct yaffs_obj *obj)
-+{
-+ struct yaffs_dev *dev = obj->my_dev;
-+ int lowest = -99; /* Stop compiler whining. */
-+ int i;
-+ struct yaffs_cache *cache;
-+ int chunk_written = 0;
-+ int n_caches = obj->my_dev->param.n_caches;
-+
-+ if (n_caches < 1)
-+ return;
-+ do {
-+ cache = NULL;
-+
-+ /* Find the lowest dirty chunk for this object */
-+ for (i = 0; i < n_caches; i++) {
-+ if (dev->cache[i].object == obj &&
-+ dev->cache[i].dirty) {
-+ if (!cache ||
-+ dev->cache[i].chunk_id < lowest) {
-+ cache = &dev->cache[i];
-+ lowest = cache->chunk_id;
-+ }
-+ }
-+ }
-+
-+ if (cache && !cache->locked) {
-+ /* Write it out and free it up */
-+ chunk_written =
-+ yaffs_wr_data_obj(cache->object,
-+ cache->chunk_id,
-+ cache->data,
-+ cache->n_bytes, 1);
-+ cache->dirty = 0;
-+ cache->object = NULL;
-+ }
-+ } while (cache && chunk_written > 0);
-+
-+ if (cache)
-+ /* Hoosterman, disk full while writing cache out. */
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs tragedy: no space during cache write");
-+}
-+
-+/*yaffs_flush_whole_cache(dev)
-+ *
-+ *
-+ */
-+
-+void yaffs_flush_whole_cache(struct yaffs_dev *dev)
-+{
-+ struct yaffs_obj *obj;
-+ int n_caches = dev->param.n_caches;
-+ int i;
-+
-+ /* Find a dirty object in the cache and flush it...
-+ * until there are no further dirty objects.
-+ */
-+ do {
-+ obj = NULL;
-+ for (i = 0; i < n_caches && !obj; i++) {
-+ if (dev->cache[i].object && dev->cache[i].dirty)
-+ obj = dev->cache[i].object;
-+ }
-+ if (obj)
-+ yaffs_flush_file_cache(obj);
-+ } while (obj);
-+
-+}
-+
-+/* Grab us a cache chunk for use.
-+ * First look for an empty one.
-+ * Then look for the least recently used non-dirty one.
-+ * Then look for the least recently used dirty one...., flush and look again.
-+ */
-+static struct yaffs_cache *yaffs_grab_chunk_worker(struct yaffs_dev *dev)
-+{
-+ int i;
-+
-+ if (dev->param.n_caches > 0) {
-+ for (i = 0; i < dev->param.n_caches; i++) {
-+ if (!dev->cache[i].object)
-+ return &dev->cache[i];
-+ }
-+ }
-+ return NULL;
-+}
-+
-+static struct yaffs_cache *yaffs_grab_chunk_cache(struct yaffs_dev *dev)
-+{
-+ struct yaffs_cache *cache;
-+ struct yaffs_obj *the_obj;
-+ int usage;
-+ int i;
-+ int pushout;
-+
-+ if (dev->param.n_caches < 1)
-+ return NULL;
-+
-+ /* Try find a non-dirty one... */
-+
-+ cache = yaffs_grab_chunk_worker(dev);
-+
-+ if (!cache) {
-+ /* They were all dirty, find the LRU object and flush
-+ * its cache, then find again.
-+ * NB what's here is not very accurate,
-+ * we actually flush the object with the LRU chunk.
-+ */
-+
-+ /* With locking we can't assume we can use entry zero,
-+ * Set the_obj to a valid pointer for Coverity. */
-+ the_obj = dev->cache[0].object;
-+ usage = -1;
-+ cache = NULL;
-+ pushout = -1;
-+
-+ for (i = 0; i < dev->param.n_caches; i++) {
-+ if (dev->cache[i].object &&
-+ !dev->cache[i].locked &&
-+ (dev->cache[i].last_use < usage ||
-+ !cache)) {
-+ usage = dev->cache[i].last_use;
-+ the_obj = dev->cache[i].object;
-+ cache = &dev->cache[i];
-+ pushout = i;
-+ }
-+ }
-+
-+ if (!cache || cache->dirty) {
-+ /* Flush and try again */
-+ yaffs_flush_file_cache(the_obj);
-+ cache = yaffs_grab_chunk_worker(dev);
-+ }
-+ }
-+ return cache;
-+}
-+
-+/* Find a cached chunk */
-+static struct yaffs_cache *yaffs_find_chunk_cache(const struct yaffs_obj *obj,
-+ int chunk_id)
-+{
-+ struct yaffs_dev *dev = obj->my_dev;
-+ int i;
-+
-+ if (dev->param.n_caches < 1)
-+ return NULL;
-+
-+ for (i = 0; i < dev->param.n_caches; i++) {
-+ if (dev->cache[i].object == obj &&
-+ dev->cache[i].chunk_id == chunk_id) {
-+ dev->cache_hits++;
-+
-+ return &dev->cache[i];
-+ }
-+ }
-+ return NULL;
-+}
-+
-+/* Mark the chunk for the least recently used algorithym */
-+static void yaffs_use_cache(struct yaffs_dev *dev, struct yaffs_cache *cache,
-+ int is_write)
-+{
-+ int i;
-+
-+ if (dev->param.n_caches < 1)
-+ return;
-+
-+ if (dev->cache_last_use < 0 ||
-+ dev->cache_last_use > 100000000) {
-+ /* Reset the cache usages */
-+ for (i = 1; i < dev->param.n_caches; i++)
-+ dev->cache[i].last_use = 0;
-+
-+ dev->cache_last_use = 0;
-+ }
-+ dev->cache_last_use++;
-+ cache->last_use = dev->cache_last_use;
-+
-+ if (is_write)
-+ cache->dirty = 1;
-+}
-+
-+/* Invalidate a single cache page.
-+ * Do this when a whole page gets written,
-+ * ie the short cache for this page is no longer valid.
-+ */
-+static void yaffs_invalidate_chunk_cache(struct yaffs_obj *object, int chunk_id)
-+{
-+ struct yaffs_cache *cache;
-+
-+ if (object->my_dev->param.n_caches > 0) {
-+ cache = yaffs_find_chunk_cache(object, chunk_id);
-+
-+ if (cache)
-+ cache->object = NULL;
-+ }
-+}
-+
-+/* Invalidate all the cache pages associated with this object
-+ * Do this whenever ther file is deleted or resized.
-+ */
-+static void yaffs_invalidate_whole_cache(struct yaffs_obj *in)
-+{
-+ int i;
-+ struct yaffs_dev *dev = in->my_dev;
-+
-+ if (dev->param.n_caches > 0) {
-+ /* Invalidate it. */
-+ for (i = 0; i < dev->param.n_caches; i++) {
-+ if (dev->cache[i].object == in)
-+ dev->cache[i].object = NULL;
-+ }
-+ }
-+}
-+
-+static void yaffs_unhash_obj(struct yaffs_obj *obj)
-+{
-+ int bucket;
-+ struct yaffs_dev *dev = obj->my_dev;
-+
-+ /* If it is still linked into the bucket list, free from the list */
-+ if (!list_empty(&obj->hash_link)) {
-+ list_del_init(&obj->hash_link);
-+ bucket = yaffs_hash_fn(obj->obj_id);
-+ dev->obj_bucket[bucket].count--;
-+ }
-+}
-+
-+/* FreeObject frees up a Object and puts it back on the free list */
-+static void yaffs_free_obj(struct yaffs_obj *obj)
-+{
-+ struct yaffs_dev *dev;
-+
-+ if (!obj) {
-+ BUG();
-+ return;
-+ }
-+ dev = obj->my_dev;
-+ yaffs_trace(YAFFS_TRACE_OS, "FreeObject %p inode %p",
-+ obj, obj->my_inode);
-+ if (obj->parent)
-+ BUG();
-+ if (!list_empty(&obj->siblings))
-+ BUG();
-+
-+ if (obj->my_inode) {
-+ /* We're still hooked up to a cached inode.
-+ * Don't delete now, but mark for later deletion
-+ */
-+ obj->defered_free = 1;
-+ return;
-+ }
-+
-+ yaffs_unhash_obj(obj);
-+
-+ yaffs_free_raw_obj(dev, obj);
-+ dev->n_obj--;
-+ dev->checkpoint_blocks_required = 0; /* force recalculation */
-+}
-+
-+void yaffs_handle_defered_free(struct yaffs_obj *obj)
-+{
-+ if (obj->defered_free)
-+ yaffs_free_obj(obj);
-+}
-+
-+static int yaffs_generic_obj_del(struct yaffs_obj *in)
-+{
-+ /* Iinvalidate the file's data in the cache, without flushing. */
-+ yaffs_invalidate_whole_cache(in);
-+
-+ if (in->my_dev->param.is_yaffs2 && in->parent != in->my_dev->del_dir) {
-+ /* Move to unlinked directory so we have a deletion record */
-+ yaffs_change_obj_name(in, in->my_dev->del_dir, _Y("deleted"), 0,
-+ 0);
-+ }
-+
-+ yaffs_remove_obj_from_dir(in);
-+ yaffs_chunk_del(in->my_dev, in->hdr_chunk, 1, __LINE__);
-+ in->hdr_chunk = 0;
-+
-+ yaffs_free_obj(in);
-+ return YAFFS_OK;
-+
-+}
-+
-+static void yaffs_soft_del_file(struct yaffs_obj *obj)
-+{
-+ if (!obj->deleted ||
-+ obj->variant_type != YAFFS_OBJECT_TYPE_FILE ||
-+ obj->soft_del)
-+ return;
-+
-+ if (obj->n_data_chunks <= 0) {
-+ /* Empty file with no duplicate object headers,
-+ * just delete it immediately */
-+ yaffs_free_tnode(obj->my_dev, obj->variant.file_variant.top);
-+ obj->variant.file_variant.top = NULL;
-+ yaffs_trace(YAFFS_TRACE_TRACING,
-+ "yaffs: Deleting empty file %d",
-+ obj->obj_id);
-+ yaffs_generic_obj_del(obj);
-+ } else {
-+ yaffs_soft_del_worker(obj,
-+ obj->variant.file_variant.top,
-+ obj->variant.
-+ file_variant.top_level, 0);
-+ obj->soft_del = 1;
-+ }
-+}
-+
-+/* Pruning removes any part of the file structure tree that is beyond the
-+ * bounds of the file (ie that does not point to chunks).
-+ *
-+ * A file should only get pruned when its size is reduced.
-+ *
-+ * Before pruning, the chunks must be pulled from the tree and the
-+ * level 0 tnode entries must be zeroed out.
-+ * Could also use this for file deletion, but that's probably better handled
-+ * by a special case.
-+ *
-+ * This function is recursive. For levels > 0 the function is called again on
-+ * any sub-tree. For level == 0 we just check if the sub-tree has data.
-+ * If there is no data in a subtree then it is pruned.
-+ */
-+
-+static struct yaffs_tnode *yaffs_prune_worker(struct yaffs_dev *dev,
-+ struct yaffs_tnode *tn, u32 level,
-+ int del0)
-+{
-+ int i;
-+ int has_data;
-+
-+ if (!tn)
-+ return tn;
-+
-+ has_data = 0;
-+
-+ if (level > 0) {
-+ for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) {
-+ if (tn->internal[i]) {
-+ tn->internal[i] =
-+ yaffs_prune_worker(dev,
-+ tn->internal[i],
-+ level - 1,
-+ (i == 0) ? del0 : 1);
-+ }
-+
-+ if (tn->internal[i])
-+ has_data++;
-+ }
-+ } else {
-+ int tnode_size_u32 = dev->tnode_size / sizeof(u32);
-+ u32 *map = (u32 *) tn;
-+
-+ for (i = 0; !has_data && i < tnode_size_u32; i++) {
-+ if (map[i])
-+ has_data++;
-+ }
-+ }
-+
-+ if (has_data == 0 && del0) {
-+ /* Free and return NULL */
-+ yaffs_free_tnode(dev, tn);
-+ tn = NULL;
-+ }
-+ return tn;
-+}
-+
-+static int yaffs_prune_tree(struct yaffs_dev *dev,
-+ struct yaffs_file_var *file_struct)
-+{
-+ int i;
-+ int has_data;
-+ int done = 0;
-+ struct yaffs_tnode *tn;
-+
-+ if (file_struct->top_level < 1)
-+ return YAFFS_OK;
-+
-+ file_struct->top =
-+ yaffs_prune_worker(dev, file_struct->top, file_struct->top_level, 0);
-+
-+ /* Now we have a tree with all the non-zero branches NULL but
-+ * the height is the same as it was.
-+ * Let's see if we can trim internal tnodes to shorten the tree.
-+ * We can do this if only the 0th element in the tnode is in use
-+ * (ie all the non-zero are NULL)
-+ */
-+
-+ while (file_struct->top_level && !done) {
-+ tn = file_struct->top;
-+
-+ has_data = 0;
-+ for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) {
-+ if (tn->internal[i])
-+ has_data++;
-+ }
-+
-+ if (!has_data) {
-+ file_struct->top = tn->internal[0];
-+ file_struct->top_level--;
-+ yaffs_free_tnode(dev, tn);
-+ } else {
-+ done = 1;
-+ }
-+ }
-+
-+ return YAFFS_OK;
-+}
-+
-+/*-------------------- End of File Structure functions.-------------------*/
-+
-+/* alloc_empty_obj gets us a clean Object.*/
-+static struct yaffs_obj *yaffs_alloc_empty_obj(struct yaffs_dev *dev)
-+{
-+ struct yaffs_obj *obj = yaffs_alloc_raw_obj(dev);
-+
-+ if (!obj)
-+ return obj;
-+
-+ dev->n_obj++;
-+
-+ /* Now sweeten it up... */
-+
-+ memset(obj, 0, sizeof(struct yaffs_obj));
-+ obj->being_created = 1;
-+
-+ obj->my_dev = dev;
-+ obj->hdr_chunk = 0;
-+ obj->variant_type = YAFFS_OBJECT_TYPE_UNKNOWN;
-+ INIT_LIST_HEAD(&(obj->hard_links));
-+ INIT_LIST_HEAD(&(obj->hash_link));
-+ INIT_LIST_HEAD(&obj->siblings);
-+
-+ /* Now make the directory sane */
-+ if (dev->root_dir) {
-+ obj->parent = dev->root_dir;
-+ list_add(&(obj->siblings),
-+ &dev->root_dir->variant.dir_variant.children);
-+ }
-+
-+ /* Add it to the lost and found directory.
-+ * NB Can't put root or lost-n-found in lost-n-found so
-+ * check if lost-n-found exists first
-+ */
-+ if (dev->lost_n_found)
-+ yaffs_add_obj_to_dir(dev->lost_n_found, obj);
-+
-+ obj->being_created = 0;
-+
-+ dev->checkpoint_blocks_required = 0; /* force recalculation */
-+
-+ return obj;
-+}
-+
-+static int yaffs_find_nice_bucket(struct yaffs_dev *dev)
-+{
-+ int i;
-+ int l = 999;
-+ int lowest = 999999;
-+
-+ /* Search for the shortest list or one that
-+ * isn't too long.
-+ */
-+
-+ for (i = 0; i < 10 && lowest > 4; i++) {
-+ dev->bucket_finder++;
-+ dev->bucket_finder %= YAFFS_NOBJECT_BUCKETS;
-+ if (dev->obj_bucket[dev->bucket_finder].count < lowest) {
-+ lowest = dev->obj_bucket[dev->bucket_finder].count;
-+ l = dev->bucket_finder;
-+ }
-+ }
-+
-+ return l;
-+}
-+
-+static int yaffs_new_obj_id(struct yaffs_dev *dev)
-+{
-+ int bucket = yaffs_find_nice_bucket(dev);
-+ int found = 0;
-+ struct list_head *i;
-+ u32 n = (u32) bucket;
-+
-+ /* Now find an object value that has not already been taken
-+ * by scanning the list.
-+ */
-+
-+ while (!found) {
-+ found = 1;
-+ n += YAFFS_NOBJECT_BUCKETS;
-+ if (1 || dev->obj_bucket[bucket].count > 0) {
-+ list_for_each(i, &dev->obj_bucket[bucket].list) {
-+ /* If there is already one in the list */
-+ if (i && list_entry(i, struct yaffs_obj,
-+ hash_link)->obj_id == n) {
-+ found = 0;
-+ }
-+ }
-+ }
-+ }
-+ return n;
-+}
-+
-+static void yaffs_hash_obj(struct yaffs_obj *in)
-+{
-+ int bucket = yaffs_hash_fn(in->obj_id);
-+ struct yaffs_dev *dev = in->my_dev;
-+
-+ list_add(&in->hash_link, &dev->obj_bucket[bucket].list);
-+ dev->obj_bucket[bucket].count++;
-+}
-+
-+struct yaffs_obj *yaffs_find_by_number(struct yaffs_dev *dev, u32 number)
-+{
-+ int bucket = yaffs_hash_fn(number);
-+ struct list_head *i;
-+ struct yaffs_obj *in;
-+
-+ list_for_each(i, &dev->obj_bucket[bucket].list) {
-+ /* Look if it is in the list */
-+ in = list_entry(i, struct yaffs_obj, hash_link);
-+ if (in->obj_id == number) {
-+ /* Don't show if it is defered free */
-+ if (in->defered_free)
-+ return NULL;
-+ return in;
-+ }
-+ }
-+
-+ return NULL;
-+}
-+
-+static struct yaffs_obj *yaffs_new_obj(struct yaffs_dev *dev, int number,
-+ enum yaffs_obj_type type)
-+{
-+ struct yaffs_obj *the_obj = NULL;
-+ struct yaffs_tnode *tn = NULL;
-+
-+ if (number < 0)
-+ number = yaffs_new_obj_id(dev);
-+
-+ if (type == YAFFS_OBJECT_TYPE_FILE) {
-+ tn = yaffs_get_tnode(dev);
-+ if (!tn)
-+ return NULL;
-+ }
-+
-+ the_obj = yaffs_alloc_empty_obj(dev);
-+ if (!the_obj) {
-+ if (tn)
-+ yaffs_free_tnode(dev, tn);
-+ return NULL;
-+ }
-+
-+ the_obj->fake = 0;
-+ the_obj->rename_allowed = 1;
-+ the_obj->unlink_allowed = 1;
-+ the_obj->obj_id = number;
-+ yaffs_hash_obj(the_obj);
-+ the_obj->variant_type = type;
-+ yaffs_load_current_time(the_obj, 1, 1);
-+
-+ switch (type) {
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ the_obj->variant.file_variant.file_size = 0;
-+ the_obj->variant.file_variant.scanned_size = 0;
-+ the_obj->variant.file_variant.shrink_size =
-+ yaffs_max_file_size(dev);
-+ the_obj->variant.file_variant.top_level = 0;
-+ the_obj->variant.file_variant.top = tn;
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ INIT_LIST_HEAD(&the_obj->variant.dir_variant.children);
-+ INIT_LIST_HEAD(&the_obj->variant.dir_variant.dirty);
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ /* No action required */
-+ break;
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ /* todo this should not happen */
-+ break;
-+ }
-+ return the_obj;
-+}
-+
-+static struct yaffs_obj *yaffs_create_fake_dir(struct yaffs_dev *dev,
-+ int number, u32 mode)
-+{
-+
-+ struct yaffs_obj *obj =
-+ yaffs_new_obj(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY);
-+
-+ if (!obj)
-+ return NULL;
-+
-+ obj->fake = 1; /* it is fake so it might not use NAND */
-+ obj->rename_allowed = 0;
-+ obj->unlink_allowed = 0;
-+ obj->deleted = 0;
-+ obj->unlinked = 0;
-+ obj->yst_mode = mode;
-+ obj->my_dev = dev;
-+ obj->hdr_chunk = 0; /* Not a valid chunk. */
-+ return obj;
-+
-+}
-+
-+
-+static void yaffs_init_tnodes_and_objs(struct yaffs_dev *dev)
-+{
-+ int i;
-+
-+ dev->n_obj = 0;
-+ dev->n_tnodes = 0;
-+ yaffs_init_raw_tnodes_and_objs(dev);
-+
-+ for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
-+ INIT_LIST_HEAD(&dev->obj_bucket[i].list);
-+ dev->obj_bucket[i].count = 0;
-+ }
-+}
-+
-+struct yaffs_obj *yaffs_find_or_create_by_number(struct yaffs_dev *dev,
-+ int number,
-+ enum yaffs_obj_type type)
-+{
-+ struct yaffs_obj *the_obj = NULL;
-+
-+ if (number > 0)
-+ the_obj = yaffs_find_by_number(dev, number);
-+
-+ if (!the_obj)
-+ the_obj = yaffs_new_obj(dev, number, type);
-+
-+ return the_obj;
-+
-+}
-+
-+YCHAR *yaffs_clone_str(const YCHAR *str)
-+{
-+ YCHAR *new_str = NULL;
-+ int len;
-+
-+ if (!str)
-+ str = _Y("");
-+
-+ len = strnlen(str, YAFFS_MAX_ALIAS_LENGTH);
-+ new_str = kmalloc((len + 1) * sizeof(YCHAR), GFP_NOFS);
-+ if (new_str) {
-+ strncpy(new_str, str, len);
-+ new_str[len] = 0;
-+ }
-+ return new_str;
-+
-+}
-+/*
-+ *yaffs_update_parent() handles fixing a directories mtime and ctime when a new
-+ * link (ie. name) is created or deleted in the directory.
-+ *
-+ * ie.
-+ * create dir/a : update dir's mtime/ctime
-+ * rm dir/a: update dir's mtime/ctime
-+ * modify dir/a: don't update dir's mtimme/ctime
-+ *
-+ * This can be handled immediately or defered. Defering helps reduce the number
-+ * of updates when many files in a directory are changed within a brief period.
-+ *
-+ * If the directory updating is defered then yaffs_update_dirty_dirs must be
-+ * called periodically.
-+ */
-+
-+static void yaffs_update_parent(struct yaffs_obj *obj)
-+{
-+ struct yaffs_dev *dev;
-+
-+ if (!obj)
-+ return;
-+ dev = obj->my_dev;
-+ obj->dirty = 1;
-+ yaffs_load_current_time(obj, 0, 1);
-+ if (dev->param.defered_dir_update) {
-+ struct list_head *link = &obj->variant.dir_variant.dirty;
-+
-+ if (list_empty(link)) {
-+ list_add(link, &dev->dirty_dirs);
-+ yaffs_trace(YAFFS_TRACE_BACKGROUND,
-+ "Added object %d to dirty directories",
-+ obj->obj_id);
-+ }
-+
-+ } else {
-+ yaffs_update_oh(obj, NULL, 0, 0, 0, NULL);
-+ }
-+}
-+
-+void yaffs_update_dirty_dirs(struct yaffs_dev *dev)
-+{
-+ struct list_head *link;
-+ struct yaffs_obj *obj;
-+ struct yaffs_dir_var *d_s;
-+ union yaffs_obj_var *o_v;
-+
-+ yaffs_trace(YAFFS_TRACE_BACKGROUND, "Update dirty directories");
-+
-+ while (!list_empty(&dev->dirty_dirs)) {
-+ link = dev->dirty_dirs.next;
-+ list_del_init(link);
-+
-+ d_s = list_entry(link, struct yaffs_dir_var, dirty);
-+ o_v = list_entry(d_s, union yaffs_obj_var, dir_variant);
-+ obj = list_entry(o_v, struct yaffs_obj, variant);
-+
-+ yaffs_trace(YAFFS_TRACE_BACKGROUND, "Update directory %d",
-+ obj->obj_id);
-+
-+ if (obj->dirty)
-+ yaffs_update_oh(obj, NULL, 0, 0, 0, NULL);
-+ }
-+}
-+
-+/*
-+ * Mknod (create) a new object.
-+ * equiv_obj only has meaning for a hard link;
-+ * alias_str only has meaning for a symlink.
-+ * rdev only has meaning for devices (a subset of special objects)
-+ */
-+
-+static struct yaffs_obj *yaffs_create_obj(enum yaffs_obj_type type,
-+ struct yaffs_obj *parent,
-+ const YCHAR *name,
-+ u32 mode,
-+ u32 uid,
-+ u32 gid,
-+ struct yaffs_obj *equiv_obj,
-+ const YCHAR *alias_str, u32 rdev)
-+{
-+ struct yaffs_obj *in;
-+ YCHAR *str = NULL;
-+ struct yaffs_dev *dev = parent->my_dev;
-+
-+ /* Check if the entry exists.
-+ * If it does then fail the call since we don't want a dup. */
-+ if (yaffs_find_by_name(parent, name))
-+ return NULL;
-+
-+ if (type == YAFFS_OBJECT_TYPE_SYMLINK) {
-+ str = yaffs_clone_str(alias_str);
-+ if (!str)
-+ return NULL;
-+ }
-+
-+ in = yaffs_new_obj(dev, -1, type);
-+
-+ if (!in) {
-+ kfree(str);
-+ return NULL;
-+ }
-+
-+ in->hdr_chunk = 0;
-+ in->valid = 1;
-+ in->variant_type = type;
-+
-+ in->yst_mode = mode;
-+
-+ yaffs_attribs_init(in, gid, uid, rdev);
-+
-+ in->n_data_chunks = 0;
-+
-+ yaffs_set_obj_name(in, name);
-+ in->dirty = 1;
-+
-+ yaffs_add_obj_to_dir(parent, in);
-+
-+ in->my_dev = parent->my_dev;
-+
-+ switch (type) {
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ in->variant.symlink_variant.alias = str;
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ in->variant.hardlink_variant.equiv_obj = equiv_obj;
-+ in->variant.hardlink_variant.equiv_id = equiv_obj->obj_id;
-+ list_add(&in->hard_links, &equiv_obj->hard_links);
-+ break;
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ /* do nothing */
-+ break;
-+ }
-+
-+ if (yaffs_update_oh(in, name, 0, 0, 0, NULL) < 0) {
-+ /* Could not create the object header, fail */
-+ yaffs_del_obj(in);
-+ in = NULL;
-+ }
-+
-+ if (in)
-+ yaffs_update_parent(parent);
-+
-+ return in;
-+}
-+
-+struct yaffs_obj *yaffs_create_file(struct yaffs_obj *parent,
-+ const YCHAR *name, u32 mode, u32 uid,
-+ u32 gid)
-+{
-+ return yaffs_create_obj(YAFFS_OBJECT_TYPE_FILE, parent, name, mode,
-+ uid, gid, NULL, NULL, 0);
-+}
-+
-+struct yaffs_obj *yaffs_create_dir(struct yaffs_obj *parent, const YCHAR *name,
-+ u32 mode, u32 uid, u32 gid)
-+{
-+ return yaffs_create_obj(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name,
-+ mode, uid, gid, NULL, NULL, 0);
-+}
-+
-+struct yaffs_obj *yaffs_create_special(struct yaffs_obj *parent,
-+ const YCHAR *name, u32 mode, u32 uid,
-+ u32 gid, u32 rdev)
-+{
-+ return yaffs_create_obj(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode,
-+ uid, gid, NULL, NULL, rdev);
-+}
-+
-+struct yaffs_obj *yaffs_create_symlink(struct yaffs_obj *parent,
-+ const YCHAR *name, u32 mode, u32 uid,
-+ u32 gid, const YCHAR *alias)
-+{
-+ return yaffs_create_obj(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode,
-+ uid, gid, NULL, alias, 0);
-+}
-+
-+/* yaffs_link_obj returns the object id of the equivalent object.*/
-+struct yaffs_obj *yaffs_link_obj(struct yaffs_obj *parent, const YCHAR * name,
-+ struct yaffs_obj *equiv_obj)
-+{
-+ /* Get the real object in case we were fed a hard link obj */
-+ equiv_obj = yaffs_get_equivalent_obj(equiv_obj);
-+
-+ if (yaffs_create_obj(YAFFS_OBJECT_TYPE_HARDLINK,
-+ parent, name, 0, 0, 0,
-+ equiv_obj, NULL, 0))
-+ return equiv_obj;
-+
-+ return NULL;
-+
-+}
-+
-+
-+
-+/*---------------------- Block Management and Page Allocation -------------*/
-+
-+static void yaffs_deinit_blocks(struct yaffs_dev *dev)
-+{
-+ if (dev->block_info_alt && dev->block_info)
-+ vfree(dev->block_info);
-+ else
-+ kfree(dev->block_info);
-+
-+ dev->block_info_alt = 0;
-+
-+ dev->block_info = NULL;
-+
-+ if (dev->chunk_bits_alt && dev->chunk_bits)
-+ vfree(dev->chunk_bits);
-+ else
-+ kfree(dev->chunk_bits);
-+ dev->chunk_bits_alt = 0;
-+ dev->chunk_bits = NULL;
-+}
-+
-+static int yaffs_init_blocks(struct yaffs_dev *dev)
-+{
-+ int n_blocks = dev->internal_end_block - dev->internal_start_block + 1;
-+
-+ dev->block_info = NULL;
-+ dev->chunk_bits = NULL;
-+ dev->alloc_block = -1; /* force it to get a new one */
-+
-+ /* If the first allocation strategy fails, thry the alternate one */
-+ dev->block_info =
-+ kmalloc(n_blocks * sizeof(struct yaffs_block_info), GFP_NOFS);
-+ if (!dev->block_info) {
-+ dev->block_info =
-+ vmalloc(n_blocks * sizeof(struct yaffs_block_info));
-+ dev->block_info_alt = 1;
-+ } else {
-+ dev->block_info_alt = 0;
-+ }
-+
-+ if (!dev->block_info)
-+ goto alloc_error;
-+
-+ /* Set up dynamic blockinfo stuff. Round up bytes. */
-+ dev->chunk_bit_stride = (dev->param.chunks_per_block + 7) / 8;
-+ dev->chunk_bits =
-+ kmalloc(dev->chunk_bit_stride * n_blocks, GFP_NOFS);
-+ if (!dev->chunk_bits) {
-+ dev->chunk_bits =
-+ vmalloc(dev->chunk_bit_stride * n_blocks);
-+ dev->chunk_bits_alt = 1;
-+ } else {
-+ dev->chunk_bits_alt = 0;
-+ }
-+ if (!dev->chunk_bits)
-+ goto alloc_error;
-+
-+
-+ memset(dev->block_info, 0, n_blocks * sizeof(struct yaffs_block_info));
-+ memset(dev->chunk_bits, 0, dev->chunk_bit_stride * n_blocks);
-+ return YAFFS_OK;
-+
-+alloc_error:
-+ yaffs_deinit_blocks(dev);
-+ return YAFFS_FAIL;
-+}
-+
-+
-+void yaffs_block_became_dirty(struct yaffs_dev *dev, int block_no)
-+{
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, block_no);
-+ int erased_ok = 0;
-+ int i;
-+
-+ /* If the block is still healthy erase it and mark as clean.
-+ * If the block has had a data failure, then retire it.
-+ */
-+
-+ yaffs_trace(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE,
-+ "yaffs_block_became_dirty block %d state %d %s",
-+ block_no, bi->block_state,
-+ (bi->needs_retiring) ? "needs retiring" : "");
-+
-+ yaffs2_clear_oldest_dirty_seq(dev, bi);
-+
-+ bi->block_state = YAFFS_BLOCK_STATE_DIRTY;
-+
-+ /* If this is the block being garbage collected then stop gc'ing */
-+ if (block_no == dev->gc_block)
-+ dev->gc_block = 0;
-+
-+ /* If this block is currently the best candidate for gc
-+ * then drop as a candidate */
-+ if (block_no == dev->gc_dirtiest) {
-+ dev->gc_dirtiest = 0;
-+ dev->gc_pages_in_use = 0;
-+ }
-+
-+ if (!bi->needs_retiring) {
-+ yaffs2_checkpt_invalidate(dev);
-+ erased_ok = yaffs_erase_block(dev, block_no);
-+ if (!erased_ok) {
-+ dev->n_erase_failures++;
-+ yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
-+ "**>> Erasure failed %d", block_no);
-+ }
-+ }
-+
-+ /* Verify erasure if needed */
-+ if (erased_ok &&
-+ ((yaffs_trace_mask & YAFFS_TRACE_ERASE) ||
-+ !yaffs_skip_verification(dev))) {
-+ for (i = 0; i < dev->param.chunks_per_block; i++) {
-+ if (!yaffs_check_chunk_erased(dev,
-+ block_no * dev->param.chunks_per_block + i)) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ ">>Block %d erasure supposedly OK, but chunk %d not erased",
-+ block_no, i);
-+ }
-+ }
-+ }
-+
-+ if (!erased_ok) {
-+ /* We lost a block of free space */
-+ dev->n_free_chunks -= dev->param.chunks_per_block;
-+ yaffs_retire_block(dev, block_no);
-+ yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
-+ "**>> Block %d retired", block_no);
-+ return;
-+ }
-+
-+ /* Clean it up... */
-+ bi->block_state = YAFFS_BLOCK_STATE_EMPTY;
-+ bi->seq_number = 0;
-+ dev->n_erased_blocks++;
-+ bi->pages_in_use = 0;
-+ bi->soft_del_pages = 0;
-+ bi->has_shrink_hdr = 0;
-+ bi->skip_erased_check = 1; /* Clean, so no need to check */
-+ bi->gc_prioritise = 0;
-+ bi->has_summary = 0;
-+
-+ yaffs_clear_chunk_bits(dev, block_no);
-+
-+ yaffs_trace(YAFFS_TRACE_ERASE, "Erased block %d", block_no);
-+}
-+
-+static inline int yaffs_gc_process_chunk(struct yaffs_dev *dev,
-+ struct yaffs_block_info *bi,
-+ int old_chunk, u8 *buffer)
-+{
-+ int new_chunk;
-+ int mark_flash = 1;
-+ struct yaffs_ext_tags tags;
-+ struct yaffs_obj *object;
-+ int matching_chunk;
-+ int ret_val = YAFFS_OK;
-+
-+ memset(&tags, 0, sizeof(tags));
-+ yaffs_rd_chunk_tags_nand(dev, old_chunk,
-+ buffer, &tags);
-+ object = yaffs_find_by_number(dev, tags.obj_id);
-+
-+ yaffs_trace(YAFFS_TRACE_GC_DETAIL,
-+ "Collecting chunk in block %d, %d %d %d ",
-+ dev->gc_chunk, tags.obj_id,
-+ tags.chunk_id, tags.n_bytes);
-+
-+ if (object && !yaffs_skip_verification(dev)) {
-+ if (tags.chunk_id == 0)
-+ matching_chunk =
-+ object->hdr_chunk;
-+ else if (object->soft_del)
-+ /* Defeat the test */
-+ matching_chunk = old_chunk;
-+ else
-+ matching_chunk =
-+ yaffs_find_chunk_in_file
-+ (object, tags.chunk_id,
-+ NULL);
-+
-+ if (old_chunk != matching_chunk)
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "gc: page in gc mismatch: %d %d %d %d",
-+ old_chunk,
-+ matching_chunk,
-+ tags.obj_id,
-+ tags.chunk_id);
-+ }
-+
-+ if (!object) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "page %d in gc has no object: %d %d %d ",
-+ old_chunk,
-+ tags.obj_id, tags.chunk_id,
-+ tags.n_bytes);
-+ }
-+
-+ if (object &&
-+ object->deleted &&
-+ object->soft_del && tags.chunk_id != 0) {
-+ /* Data chunk in a soft deleted file,
-+ * throw it away.
-+ * It's a soft deleted data chunk,
-+ * No need to copy this, just forget
-+ * about it and fix up the object.
-+ */
-+
-+ /* Free chunks already includes
-+ * softdeleted chunks, how ever this
-+ * chunk is going to soon be really
-+ * deleted which will increment free
-+ * chunks. We have to decrement free
-+ * chunks so this works out properly.
-+ */
-+ dev->n_free_chunks--;
-+ bi->soft_del_pages--;
-+
-+ object->n_data_chunks--;
-+ if (object->n_data_chunks <= 0) {
-+ /* remeber to clean up obj */
-+ dev->gc_cleanup_list[dev->n_clean_ups] = tags.obj_id;
-+ dev->n_clean_ups++;
-+ }
-+ mark_flash = 0;
-+ } else if (object) {
-+ /* It's either a data chunk in a live
-+ * file or an ObjectHeader, so we're
-+ * interested in it.
-+ * NB Need to keep the ObjectHeaders of
-+ * deleted files until the whole file
-+ * has been deleted off
-+ */
-+ tags.serial_number++;
-+ dev->n_gc_copies++;
-+
-+ if (tags.chunk_id == 0) {
-+ /* It is an object Id,
-+ * We need to nuke the
-+ * shrinkheader flags since its
-+ * work is done.
-+ * Also need to clean up
-+ * shadowing.
-+ */
-+ struct yaffs_obj_hdr *oh;
-+ oh = (struct yaffs_obj_hdr *) buffer;
-+
-+ oh->is_shrink = 0;
-+ tags.extra_is_shrink = 0;
-+ oh->shadows_obj = 0;
-+ oh->inband_shadowed_obj_id = 0;
-+ tags.extra_shadows = 0;
-+
-+ /* Update file size */
-+ if (object->variant_type == YAFFS_OBJECT_TYPE_FILE) {
-+ yaffs_oh_size_load(oh,
-+ object->variant.file_variant.file_size);
-+ tags.extra_file_size =
-+ object->variant.file_variant.file_size;
-+ }
-+
-+ yaffs_verify_oh(object, oh, &tags, 1);
-+ new_chunk =
-+ yaffs_write_new_chunk(dev, (u8 *) oh, &tags, 1);
-+ } else {
-+ new_chunk =
-+ yaffs_write_new_chunk(dev, buffer, &tags, 1);
-+ }
-+
-+ if (new_chunk < 0) {
-+ ret_val = YAFFS_FAIL;
-+ } else {
-+
-+ /* Now fix up the Tnodes etc. */
-+
-+ if (tags.chunk_id == 0) {
-+ /* It's a header */
-+ object->hdr_chunk = new_chunk;
-+ object->serial = tags.serial_number;
-+ } else {
-+ /* It's a data chunk */
-+ yaffs_put_chunk_in_file(object, tags.chunk_id,
-+ new_chunk, 0);
-+ }
-+ }
-+ }
-+ if (ret_val == YAFFS_OK)
-+ yaffs_chunk_del(dev, old_chunk, mark_flash, __LINE__);
-+ return ret_val;
-+}
-+
-+static int yaffs_gc_block(struct yaffs_dev *dev, int block, int whole_block)
-+{
-+ int old_chunk;
-+ int ret_val = YAFFS_OK;
-+ int i;
-+ int is_checkpt_block;
-+ int max_copies;
-+ int chunks_before = yaffs_get_erased_chunks(dev);
-+ int chunks_after;
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, block);
-+
-+ is_checkpt_block = (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT);
-+
-+ yaffs_trace(YAFFS_TRACE_TRACING,
-+ "Collecting block %d, in use %d, shrink %d, whole_block %d",
-+ block, bi->pages_in_use, bi->has_shrink_hdr,
-+ whole_block);
-+
-+ /*yaffs_verify_free_chunks(dev); */
-+
-+ if (bi->block_state == YAFFS_BLOCK_STATE_FULL)
-+ bi->block_state = YAFFS_BLOCK_STATE_COLLECTING;
-+
-+ bi->has_shrink_hdr = 0; /* clear the flag so that the block can erase */
-+
-+ dev->gc_disable = 1;
-+
-+ yaffs_summary_gc(dev, block);
-+
-+ if (is_checkpt_block || !yaffs_still_some_chunks(dev, block)) {
-+ yaffs_trace(YAFFS_TRACE_TRACING,
-+ "Collecting block %d that has no chunks in use",
-+ block);
-+ yaffs_block_became_dirty(dev, block);
-+ } else {
-+
-+ u8 *buffer = yaffs_get_temp_buffer(dev);
-+
-+ yaffs_verify_blk(dev, bi, block);
-+
-+ max_copies = (whole_block) ? dev->param.chunks_per_block : 5;
-+ old_chunk = block * dev->param.chunks_per_block + dev->gc_chunk;
-+
-+ for (/* init already done */ ;
-+ ret_val == YAFFS_OK &&
-+ dev->gc_chunk < dev->param.chunks_per_block &&
-+ (bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) &&
-+ max_copies > 0;
-+ dev->gc_chunk++, old_chunk++) {
-+ if (yaffs_check_chunk_bit(dev, block, dev->gc_chunk)) {
-+ /* Page is in use and might need to be copied */
-+ max_copies--;
-+ ret_val = yaffs_gc_process_chunk(dev, bi,
-+ old_chunk, buffer);
-+ }
-+ }
-+ yaffs_release_temp_buffer(dev, buffer);
-+ }
-+
-+ yaffs_verify_collected_blk(dev, bi, block);
-+
-+ if (bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) {
-+ /*
-+ * The gc did not complete. Set block state back to FULL
-+ * because checkpointing does not restore gc.
-+ */
-+ bi->block_state = YAFFS_BLOCK_STATE_FULL;
-+ } else {
-+ /* The gc completed. */
-+ /* Do any required cleanups */
-+ for (i = 0; i < dev->n_clean_ups; i++) {
-+ /* Time to delete the file too */
-+ struct yaffs_obj *object =
-+ yaffs_find_by_number(dev, dev->gc_cleanup_list[i]);
-+ if (object) {
-+ yaffs_free_tnode(dev,
-+ object->variant.file_variant.top);
-+ object->variant.file_variant.top = NULL;
-+ yaffs_trace(YAFFS_TRACE_GC,
-+ "yaffs: About to finally delete object %d",
-+ object->obj_id);
-+ yaffs_generic_obj_del(object);
-+ object->my_dev->n_deleted_files--;
-+ }
-+
-+ }
-+ chunks_after = yaffs_get_erased_chunks(dev);
-+ if (chunks_before >= chunks_after)
-+ yaffs_trace(YAFFS_TRACE_GC,
-+ "gc did not increase free chunks before %d after %d",
-+ chunks_before, chunks_after);
-+ dev->gc_block = 0;
-+ dev->gc_chunk = 0;
-+ dev->n_clean_ups = 0;
-+ }
-+
-+ dev->gc_disable = 0;
-+
-+ return ret_val;
-+}
-+
-+/*
-+ * find_gc_block() selects the dirtiest block (or close enough)
-+ * for garbage collection.
-+ */
-+
-+static unsigned yaffs_find_gc_block(struct yaffs_dev *dev,
-+ int aggressive, int background)
-+{
-+ int i;
-+ int iterations;
-+ unsigned selected = 0;
-+ int prioritised = 0;
-+ int prioritised_exist = 0;
-+ struct yaffs_block_info *bi;
-+ int threshold;
-+
-+ /* First let's see if we need to grab a prioritised block */
-+ if (dev->has_pending_prioritised_gc && !aggressive) {
-+ dev->gc_dirtiest = 0;
-+ bi = dev->block_info;
-+ for (i = dev->internal_start_block;
-+ i <= dev->internal_end_block && !selected; i++) {
-+
-+ if (bi->gc_prioritise) {
-+ prioritised_exist = 1;
-+ if (bi->block_state == YAFFS_BLOCK_STATE_FULL &&
-+ yaffs_block_ok_for_gc(dev, bi)) {
-+ selected = i;
-+ prioritised = 1;
-+ }
-+ }
-+ bi++;
-+ }
-+
-+ /*
-+ * If there is a prioritised block and none was selected then
-+ * this happened because there is at least one old dirty block
-+ * gumming up the works. Let's gc the oldest dirty block.
-+ */
-+
-+ if (prioritised_exist &&
-+ !selected && dev->oldest_dirty_block > 0)
-+ selected = dev->oldest_dirty_block;
-+
-+ if (!prioritised_exist) /* None found, so we can clear this */
-+ dev->has_pending_prioritised_gc = 0;
-+ }
-+
-+ /* If we're doing aggressive GC then we are happy to take a less-dirty
-+ * block, and search harder.
-+ * else (leasurely gc), then we only bother to do this if the
-+ * block has only a few pages in use.
-+ */
-+
-+ if (!selected) {
-+ int pages_used;
-+ int n_blocks =
-+ dev->internal_end_block - dev->internal_start_block + 1;
-+ if (aggressive) {
-+ threshold = dev->param.chunks_per_block;
-+ iterations = n_blocks;
-+ } else {
-+ int max_threshold;
-+
-+ if (background)
-+ max_threshold = dev->param.chunks_per_block / 2;
-+ else
-+ max_threshold = dev->param.chunks_per_block / 8;
-+
-+ if (max_threshold < YAFFS_GC_PASSIVE_THRESHOLD)
-+ max_threshold = YAFFS_GC_PASSIVE_THRESHOLD;
-+
-+ threshold = background ? (dev->gc_not_done + 2) * 2 : 0;
-+ if (threshold < YAFFS_GC_PASSIVE_THRESHOLD)
-+ threshold = YAFFS_GC_PASSIVE_THRESHOLD;
-+ if (threshold > max_threshold)
-+ threshold = max_threshold;
-+
-+ iterations = n_blocks / 16 + 1;
-+ if (iterations > 100)
-+ iterations = 100;
-+ }
-+
-+ for (i = 0;
-+ i < iterations &&
-+ (dev->gc_dirtiest < 1 ||
-+ dev->gc_pages_in_use > YAFFS_GC_GOOD_ENOUGH);
-+ i++) {
-+ dev->gc_block_finder++;
-+ if (dev->gc_block_finder < dev->internal_start_block ||
-+ dev->gc_block_finder > dev->internal_end_block)
-+ dev->gc_block_finder =
-+ dev->internal_start_block;
-+
-+ bi = yaffs_get_block_info(dev, dev->gc_block_finder);
-+
-+ pages_used = bi->pages_in_use - bi->soft_del_pages;
-+
-+ if (bi->block_state == YAFFS_BLOCK_STATE_FULL &&
-+ pages_used < dev->param.chunks_per_block &&
-+ (dev->gc_dirtiest < 1 ||
-+ pages_used < dev->gc_pages_in_use) &&
-+ yaffs_block_ok_for_gc(dev, bi)) {
-+ dev->gc_dirtiest = dev->gc_block_finder;
-+ dev->gc_pages_in_use = pages_used;
-+ }
-+ }
-+
-+ if (dev->gc_dirtiest > 0 && dev->gc_pages_in_use <= threshold)
-+ selected = dev->gc_dirtiest;
-+ }
-+
-+ /*
-+ * If nothing has been selected for a while, try the oldest dirty
-+ * because that's gumming up the works.
-+ */
-+
-+ if (!selected && dev->param.is_yaffs2 &&
-+ dev->gc_not_done >= (background ? 10 : 20)) {
-+ yaffs2_find_oldest_dirty_seq(dev);
-+ if (dev->oldest_dirty_block > 0) {
-+ selected = dev->oldest_dirty_block;
-+ dev->gc_dirtiest = selected;
-+ dev->oldest_dirty_gc_count++;
-+ bi = yaffs_get_block_info(dev, selected);
-+ dev->gc_pages_in_use =
-+ bi->pages_in_use - bi->soft_del_pages;
-+ } else {
-+ dev->gc_not_done = 0;
-+ }
-+ }
-+
-+ if (selected) {
-+ yaffs_trace(YAFFS_TRACE_GC,
-+ "GC Selected block %d with %d free, prioritised:%d",
-+ selected,
-+ dev->param.chunks_per_block - dev->gc_pages_in_use,
-+ prioritised);
-+
-+ dev->n_gc_blocks++;
-+ if (background)
-+ dev->bg_gcs++;
-+
-+ dev->gc_dirtiest = 0;
-+ dev->gc_pages_in_use = 0;
-+ dev->gc_not_done = 0;
-+ if (dev->refresh_skip > 0)
-+ dev->refresh_skip--;
-+ } else {
-+ dev->gc_not_done++;
-+ yaffs_trace(YAFFS_TRACE_GC,
-+ "GC none: finder %d skip %d threshold %d dirtiest %d using %d oldest %d%s",
-+ dev->gc_block_finder, dev->gc_not_done, threshold,
-+ dev->gc_dirtiest, dev->gc_pages_in_use,
-+ dev->oldest_dirty_block, background ? " bg" : "");
-+ }
-+
-+ return selected;
-+}
-+
-+/* New garbage collector
-+ * If we're very low on erased blocks then we do aggressive garbage collection
-+ * otherwise we do "leasurely" garbage collection.
-+ * Aggressive gc looks further (whole array) and will accept less dirty blocks.
-+ * Passive gc only inspects smaller areas and only accepts more dirty blocks.
-+ *
-+ * The idea is to help clear out space in a more spread-out manner.
-+ * Dunno if it really does anything useful.
-+ */
-+static int yaffs_check_gc(struct yaffs_dev *dev, int background)
-+{
-+ int aggressive = 0;
-+ int gc_ok = YAFFS_OK;
-+ int max_tries = 0;
-+ int min_erased;
-+ int erased_chunks;
-+ int checkpt_block_adjust;
-+
-+ if (dev->param.gc_control_fn &&
-+ (dev->param.gc_control_fn(dev) & 1) == 0)
-+ return YAFFS_OK;
-+
-+ if (dev->gc_disable)
-+ /* Bail out so we don't get recursive gc */
-+ return YAFFS_OK;
-+
-+ /* This loop should pass the first time.
-+ * Only loops here if the collection does not increase space.
-+ */
-+
-+ do {
-+ max_tries++;
-+
-+ checkpt_block_adjust = yaffs_calc_checkpt_blocks_required(dev);
-+
-+ min_erased =
-+ dev->param.n_reserved_blocks + checkpt_block_adjust + 1;
-+ erased_chunks =
-+ dev->n_erased_blocks * dev->param.chunks_per_block;
-+
-+ /* If we need a block soon then do aggressive gc. */
-+ if (dev->n_erased_blocks < min_erased)
-+ aggressive = 1;
-+ else {
-+ if (!background
-+ && erased_chunks > (dev->n_free_chunks / 4))
-+ break;
-+
-+ if (dev->gc_skip > 20)
-+ dev->gc_skip = 20;
-+ if (erased_chunks < dev->n_free_chunks / 2 ||
-+ dev->gc_skip < 1 || background)
-+ aggressive = 0;
-+ else {
-+ dev->gc_skip--;
-+ break;
-+ }
-+ }
-+
-+ dev->gc_skip = 5;
-+
-+ /* If we don't already have a block being gc'd then see if we
-+ * should start another */
-+
-+ if (dev->gc_block < 1 && !aggressive) {
-+ dev->gc_block = yaffs2_find_refresh_block(dev);
-+ dev->gc_chunk = 0;
-+ dev->n_clean_ups = 0;
-+ }
-+ if (dev->gc_block < 1) {
-+ dev->gc_block =
-+ yaffs_find_gc_block(dev, aggressive, background);
-+ dev->gc_chunk = 0;
-+ dev->n_clean_ups = 0;
-+ }
-+
-+ if (dev->gc_block > 0) {
-+ dev->all_gcs++;
-+ if (!aggressive)
-+ dev->passive_gc_count++;
-+
-+ yaffs_trace(YAFFS_TRACE_GC,
-+ "yaffs: GC n_erased_blocks %d aggressive %d",
-+ dev->n_erased_blocks, aggressive);
-+
-+ gc_ok = yaffs_gc_block(dev, dev->gc_block, aggressive);
-+ }
-+
-+ if (dev->n_erased_blocks < (dev->param.n_reserved_blocks) &&
-+ dev->gc_block > 0) {
-+ yaffs_trace(YAFFS_TRACE_GC,
-+ "yaffs: GC !!!no reclaim!!! n_erased_blocks %d after try %d block %d",
-+ dev->n_erased_blocks, max_tries,
-+ dev->gc_block);
-+ }
-+ } while ((dev->n_erased_blocks < dev->param.n_reserved_blocks) &&
-+ (dev->gc_block > 0) && (max_tries < 2));
-+
-+ return aggressive ? gc_ok : YAFFS_OK;
-+}
-+
-+/*
-+ * yaffs_bg_gc()
-+ * Garbage collects. Intended to be called from a background thread.
-+ * Returns non-zero if at least half the free chunks are erased.
-+ */
-+int yaffs_bg_gc(struct yaffs_dev *dev, unsigned urgency)
-+{
-+ int erased_chunks = dev->n_erased_blocks * dev->param.chunks_per_block;
-+
-+ yaffs_trace(YAFFS_TRACE_BACKGROUND, "Background gc %u", urgency);
-+
-+ yaffs_check_gc(dev, 1);
-+ return erased_chunks > dev->n_free_chunks / 2;
-+}
-+
-+/*-------------------- Data file manipulation -----------------*/
-+
-+static int yaffs_rd_data_obj(struct yaffs_obj *in, int inode_chunk, u8 * buffer)
-+{
-+ int nand_chunk = yaffs_find_chunk_in_file(in, inode_chunk, NULL);
-+
-+ if (nand_chunk >= 0)
-+ return yaffs_rd_chunk_tags_nand(in->my_dev, nand_chunk,
-+ buffer, NULL);
-+ else {
-+ yaffs_trace(YAFFS_TRACE_NANDACCESS,
-+ "Chunk %d not found zero instead",
-+ nand_chunk);
-+ /* get sane (zero) data if you read a hole */
-+ memset(buffer, 0, in->my_dev->data_bytes_per_chunk);
-+ return 0;
-+ }
-+
-+}
-+
-+void yaffs_chunk_del(struct yaffs_dev *dev, int chunk_id, int mark_flash,
-+ int lyn)
-+{
-+ int block;
-+ int page;
-+ struct yaffs_ext_tags tags;
-+ struct yaffs_block_info *bi;
-+
-+ if (chunk_id <= 0)
-+ return;
-+
-+ dev->n_deletions++;
-+ block = chunk_id / dev->param.chunks_per_block;
-+ page = chunk_id % dev->param.chunks_per_block;
-+
-+ if (!yaffs_check_chunk_bit(dev, block, page))
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Deleting invalid chunk %d", chunk_id);
-+
-+ bi = yaffs_get_block_info(dev, block);
-+
-+ yaffs2_update_oldest_dirty_seq(dev, block, bi);
-+
-+ yaffs_trace(YAFFS_TRACE_DELETION,
-+ "line %d delete of chunk %d",
-+ lyn, chunk_id);
-+
-+ if (!dev->param.is_yaffs2 && mark_flash &&
-+ bi->block_state != YAFFS_BLOCK_STATE_COLLECTING) {
-+
-+ memset(&tags, 0, sizeof(tags));
-+ tags.is_deleted = 1;
-+ yaffs_wr_chunk_tags_nand(dev, chunk_id, NULL, &tags);
-+ yaffs_handle_chunk_update(dev, chunk_id, &tags);
-+ } else {
-+ dev->n_unmarked_deletions++;
-+ }
-+
-+ /* Pull out of the management area.
-+ * If the whole block became dirty, this will kick off an erasure.
-+ */
-+ if (bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING ||
-+ bi->block_state == YAFFS_BLOCK_STATE_FULL ||
-+ bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCAN ||
-+ bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) {
-+ dev->n_free_chunks++;
-+ yaffs_clear_chunk_bit(dev, block, page);
-+ bi->pages_in_use--;
-+
-+ if (bi->pages_in_use == 0 &&
-+ !bi->has_shrink_hdr &&
-+ bi->block_state != YAFFS_BLOCK_STATE_ALLOCATING &&
-+ bi->block_state != YAFFS_BLOCK_STATE_NEEDS_SCAN) {
-+ yaffs_block_became_dirty(dev, block);
-+ }
-+ }
-+}
-+
-+static int yaffs_wr_data_obj(struct yaffs_obj *in, int inode_chunk,
-+ const u8 *buffer, int n_bytes, int use_reserve)
-+{
-+ /* Find old chunk Need to do this to get serial number
-+ * Write new one and patch into tree.
-+ * Invalidate old tags.
-+ */
-+
-+ int prev_chunk_id;
-+ struct yaffs_ext_tags prev_tags;
-+ int new_chunk_id;
-+ struct yaffs_ext_tags new_tags;
-+ struct yaffs_dev *dev = in->my_dev;
-+
-+ yaffs_check_gc(dev, 0);
-+
-+ /* Get the previous chunk at this location in the file if it exists.
-+ * If it does not exist then put a zero into the tree. This creates
-+ * the tnode now, rather than later when it is harder to clean up.
-+ */
-+ prev_chunk_id = yaffs_find_chunk_in_file(in, inode_chunk, &prev_tags);
-+ if (prev_chunk_id < 1 &&
-+ !yaffs_put_chunk_in_file(in, inode_chunk, 0, 0))
-+ return 0;
-+
-+ /* Set up new tags */
-+ memset(&new_tags, 0, sizeof(new_tags));
-+
-+ new_tags.chunk_id = inode_chunk;
-+ new_tags.obj_id = in->obj_id;
-+ new_tags.serial_number =
-+ (prev_chunk_id > 0) ? prev_tags.serial_number + 1 : 1;
-+ new_tags.n_bytes = n_bytes;
-+
-+ if (n_bytes < 1 || n_bytes > dev->param.total_bytes_per_chunk) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "Writing %d bytes to chunk!!!!!!!!!",
-+ n_bytes);
-+ BUG();
-+ }
-+
-+ new_chunk_id =
-+ yaffs_write_new_chunk(dev, buffer, &new_tags, use_reserve);
-+
-+ if (new_chunk_id > 0) {
-+ yaffs_put_chunk_in_file(in, inode_chunk, new_chunk_id, 0);
-+
-+ if (prev_chunk_id > 0)
-+ yaffs_chunk_del(dev, prev_chunk_id, 1, __LINE__);
-+
-+ yaffs_verify_file_sane(in);
-+ }
-+ return new_chunk_id;
-+
-+}
-+
-+
-+
-+static int yaffs_do_xattrib_mod(struct yaffs_obj *obj, int set,
-+ const YCHAR *name, const void *value, int size,
-+ int flags)
-+{
-+ struct yaffs_xattr_mod xmod;
-+ int result;
-+
-+ xmod.set = set;
-+ xmod.name = name;
-+ xmod.data = value;
-+ xmod.size = size;
-+ xmod.flags = flags;
-+ xmod.result = -ENOSPC;
-+
-+ result = yaffs_update_oh(obj, NULL, 0, 0, 0, &xmod);
-+
-+ if (result > 0)
-+ return xmod.result;
-+ else
-+ return -ENOSPC;
-+}
-+
-+static int yaffs_apply_xattrib_mod(struct yaffs_obj *obj, char *buffer,
-+ struct yaffs_xattr_mod *xmod)
-+{
-+ int retval = 0;
-+ int x_offs = sizeof(struct yaffs_obj_hdr);
-+ struct yaffs_dev *dev = obj->my_dev;
-+ int x_size = dev->data_bytes_per_chunk - sizeof(struct yaffs_obj_hdr);
-+ char *x_buffer = buffer + x_offs;
-+
-+ if (xmod->set)
-+ retval =
-+ nval_set(x_buffer, x_size, xmod->name, xmod->data,
-+ xmod->size, xmod->flags);
-+ else
-+ retval = nval_del(x_buffer, x_size, xmod->name);
-+
-+ obj->has_xattr = nval_hasvalues(x_buffer, x_size);
-+ obj->xattr_known = 1;
-+ xmod->result = retval;
-+
-+ return retval;
-+}
-+
-+static int yaffs_do_xattrib_fetch(struct yaffs_obj *obj, const YCHAR *name,
-+ void *value, int size)
-+{
-+ char *buffer = NULL;
-+ int result;
-+ struct yaffs_ext_tags tags;
-+ struct yaffs_dev *dev = obj->my_dev;
-+ int x_offs = sizeof(struct yaffs_obj_hdr);
-+ int x_size = dev->data_bytes_per_chunk - sizeof(struct yaffs_obj_hdr);
-+ char *x_buffer;
-+ int retval = 0;
-+
-+ if (obj->hdr_chunk < 1)
-+ return -ENODATA;
-+
-+ /* If we know that the object has no xattribs then don't do all the
-+ * reading and parsing.
-+ */
-+ if (obj->xattr_known && !obj->has_xattr) {
-+ if (name)
-+ return -ENODATA;
-+ else
-+ return 0;
-+ }
-+
-+ buffer = (char *)yaffs_get_temp_buffer(dev);
-+ if (!buffer)
-+ return -ENOMEM;
-+
-+ result =
-+ yaffs_rd_chunk_tags_nand(dev, obj->hdr_chunk, (u8 *) buffer, &tags);
-+
-+ if (result != YAFFS_OK)
-+ retval = -ENOENT;
-+ else {
-+ x_buffer = buffer + x_offs;
-+
-+ if (!obj->xattr_known) {
-+ obj->has_xattr = nval_hasvalues(x_buffer, x_size);
-+ obj->xattr_known = 1;
-+ }
-+
-+ if (name)
-+ retval = nval_get(x_buffer, x_size, name, value, size);
-+ else
-+ retval = nval_list(x_buffer, x_size, value, size);
-+ }
-+ yaffs_release_temp_buffer(dev, (u8 *) buffer);
-+ return retval;
-+}
-+
-+int yaffs_set_xattrib(struct yaffs_obj *obj, const YCHAR * name,
-+ const void *value, int size, int flags)
-+{
-+ return yaffs_do_xattrib_mod(obj, 1, name, value, size, flags);
-+}
-+
-+int yaffs_remove_xattrib(struct yaffs_obj *obj, const YCHAR * name)
-+{
-+ return yaffs_do_xattrib_mod(obj, 0, name, NULL, 0, 0);
-+}
-+
-+int yaffs_get_xattrib(struct yaffs_obj *obj, const YCHAR * name, void *value,
-+ int size)
-+{
-+ return yaffs_do_xattrib_fetch(obj, name, value, size);
-+}
-+
-+int yaffs_list_xattrib(struct yaffs_obj *obj, char *buffer, int size)
-+{
-+ return yaffs_do_xattrib_fetch(obj, NULL, buffer, size);
-+}
-+
-+static void yaffs_check_obj_details_loaded(struct yaffs_obj *in)
-+{
-+ u8 *buf;
-+ struct yaffs_obj_hdr *oh;
-+ struct yaffs_dev *dev;
-+ struct yaffs_ext_tags tags;
-+ int result;
-+ int alloc_failed = 0;
-+
-+ if (!in || !in->lazy_loaded || in->hdr_chunk < 1)
-+ return;
-+
-+ dev = in->my_dev;
-+ in->lazy_loaded = 0;
-+ buf = yaffs_get_temp_buffer(dev);
-+
-+ result = yaffs_rd_chunk_tags_nand(dev, in->hdr_chunk, buf, &tags);
-+ oh = (struct yaffs_obj_hdr *)buf;
-+
-+ in->yst_mode = oh->yst_mode;
-+ yaffs_load_attribs(in, oh);
-+ yaffs_set_obj_name_from_oh(in, oh);
-+
-+ if (in->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) {
-+ in->variant.symlink_variant.alias =
-+ yaffs_clone_str(oh->alias);
-+ if (!in->variant.symlink_variant.alias)
-+ alloc_failed = 1; /* Not returned */
-+ }
-+ yaffs_release_temp_buffer(dev, buf);
-+}
-+
-+static void yaffs_load_name_from_oh(struct yaffs_dev *dev, YCHAR *name,
-+ const YCHAR *oh_name, int buff_size)
-+{
-+#ifdef CONFIG_YAFFS_AUTO_UNICODE
-+ if (dev->param.auto_unicode) {
-+ if (*oh_name) {
-+ /* It is an ASCII name, do an ASCII to
-+ * unicode conversion */
-+ const char *ascii_oh_name = (const char *)oh_name;
-+ int n = buff_size - 1;
-+ while (n > 0 && *ascii_oh_name) {
-+ *name = *ascii_oh_name;
-+ name++;
-+ ascii_oh_name++;
-+ n--;
-+ }
-+ } else {
-+ strncpy(name, oh_name + 1, buff_size - 1);
-+ }
-+ } else {
-+#else
-+ (void) dev;
-+ {
-+#endif
-+ strncpy(name, oh_name, buff_size - 1);
-+ }
-+}
-+
-+static void yaffs_load_oh_from_name(struct yaffs_dev *dev, YCHAR *oh_name,
-+ const YCHAR *name)
-+{
-+#ifdef CONFIG_YAFFS_AUTO_UNICODE
-+
-+ int is_ascii;
-+ YCHAR *w;
-+
-+ if (dev->param.auto_unicode) {
-+
-+ is_ascii = 1;
-+ w = name;
-+
-+ /* Figure out if the name will fit in ascii character set */
-+ while (is_ascii && *w) {
-+ if ((*w) & 0xff00)
-+ is_ascii = 0;
-+ w++;
-+ }
-+
-+ if (is_ascii) {
-+ /* It is an ASCII name, so convert unicode to ascii */
-+ char *ascii_oh_name = (char *)oh_name;
-+ int n = YAFFS_MAX_NAME_LENGTH - 1;
-+ while (n > 0 && *name) {
-+ *ascii_oh_name = *name;
-+ name++;
-+ ascii_oh_name++;
-+ n--;
-+ }
-+ } else {
-+ /* Unicode name, so save starting at the second YCHAR */
-+ *oh_name = 0;
-+ strncpy(oh_name + 1, name, YAFFS_MAX_NAME_LENGTH - 2);
-+ }
-+ } else {
-+#else
-+ dev = dev;
-+ {
-+#endif
-+ strncpy(oh_name, name, YAFFS_MAX_NAME_LENGTH - 1);
-+ }
-+}
-+
-+/* UpdateObjectHeader updates the header on NAND for an object.
-+ * If name is not NULL, then that new name is used.
-+ */
-+int yaffs_update_oh(struct yaffs_obj *in, const YCHAR *name, int force,
-+ int is_shrink, int shadows, struct yaffs_xattr_mod *xmod)
-+{
-+
-+ struct yaffs_block_info *bi;
-+ struct yaffs_dev *dev = in->my_dev;
-+ int prev_chunk_id;
-+ int ret_val = 0;
-+ int result = 0;
-+ int new_chunk_id;
-+ struct yaffs_ext_tags new_tags;
-+ struct yaffs_ext_tags old_tags;
-+ const YCHAR *alias = NULL;
-+ u8 *buffer = NULL;
-+ YCHAR old_name[YAFFS_MAX_NAME_LENGTH + 1];
-+ struct yaffs_obj_hdr *oh = NULL;
-+ loff_t file_size = 0;
-+
-+ strcpy(old_name, _Y("silly old name"));
-+
-+ if (in->fake && in != dev->root_dir && !force && !xmod)
-+ return ret_val;
-+
-+ yaffs_check_gc(dev, 0);
-+ yaffs_check_obj_details_loaded(in);
-+
-+ buffer = yaffs_get_temp_buffer(in->my_dev);
-+ oh = (struct yaffs_obj_hdr *)buffer;
-+
-+ prev_chunk_id = in->hdr_chunk;
-+
-+ if (prev_chunk_id > 0) {
-+ result = yaffs_rd_chunk_tags_nand(dev, prev_chunk_id,
-+ buffer, &old_tags);
-+
-+ yaffs_verify_oh(in, oh, &old_tags, 0);
-+ memcpy(old_name, oh->name, sizeof(oh->name));
-+ memset(buffer, 0xff, sizeof(struct yaffs_obj_hdr));
-+ } else {
-+ memset(buffer, 0xff, dev->data_bytes_per_chunk);
-+ }
-+
-+ oh->type = in->variant_type;
-+ oh->yst_mode = in->yst_mode;
-+ oh->shadows_obj = oh->inband_shadowed_obj_id = shadows;
-+
-+ yaffs_load_attribs_oh(oh, in);
-+
-+ if (in->parent)
-+ oh->parent_obj_id = in->parent->obj_id;
-+ else
-+ oh->parent_obj_id = 0;
-+
-+ if (name && *name) {
-+ memset(oh->name, 0, sizeof(oh->name));
-+ yaffs_load_oh_from_name(dev, oh->name, name);
-+ } else if (prev_chunk_id > 0) {
-+ memcpy(oh->name, old_name, sizeof(oh->name));
-+ } else {
-+ memset(oh->name, 0, sizeof(oh->name));
-+ }
-+
-+ oh->is_shrink = is_shrink;
-+
-+ switch (in->variant_type) {
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ /* Should not happen */
-+ break;
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ if (oh->parent_obj_id != YAFFS_OBJECTID_DELETED &&
-+ oh->parent_obj_id != YAFFS_OBJECTID_UNLINKED)
-+ file_size = in->variant.file_variant.file_size;
-+ yaffs_oh_size_load(oh, file_size);
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ oh->equiv_id = in->variant.hardlink_variant.equiv_id;
-+ break;
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ /* Do nothing */
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ /* Do nothing */
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ alias = in->variant.symlink_variant.alias;
-+ if (!alias)
-+ alias = _Y("no alias");
-+ strncpy(oh->alias, alias, YAFFS_MAX_ALIAS_LENGTH);
-+ oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0;
-+ break;
-+ }
-+
-+ /* process any xattrib modifications */
-+ if (xmod)
-+ yaffs_apply_xattrib_mod(in, (char *)buffer, xmod);
-+
-+ /* Tags */
-+ memset(&new_tags, 0, sizeof(new_tags));
-+ in->serial++;
-+ new_tags.chunk_id = 0;
-+ new_tags.obj_id = in->obj_id;
-+ new_tags.serial_number = in->serial;
-+
-+ /* Add extra info for file header */
-+ new_tags.extra_available = 1;
-+ new_tags.extra_parent_id = oh->parent_obj_id;
-+ new_tags.extra_file_size = file_size;
-+ new_tags.extra_is_shrink = oh->is_shrink;
-+ new_tags.extra_equiv_id = oh->equiv_id;
-+ new_tags.extra_shadows = (oh->shadows_obj > 0) ? 1 : 0;
-+ new_tags.extra_obj_type = in->variant_type;
-+ yaffs_verify_oh(in, oh, &new_tags, 1);
-+
-+ /* Create new chunk in NAND */
-+ new_chunk_id =
-+ yaffs_write_new_chunk(dev, buffer, &new_tags,
-+ (prev_chunk_id > 0) ? 1 : 0);
-+
-+ if (buffer)
-+ yaffs_release_temp_buffer(dev, buffer);
-+
-+ if (new_chunk_id < 0)
-+ return new_chunk_id;
-+
-+ in->hdr_chunk = new_chunk_id;
-+
-+ if (prev_chunk_id > 0)
-+ yaffs_chunk_del(dev, prev_chunk_id, 1, __LINE__);
-+
-+ if (!yaffs_obj_cache_dirty(in))
-+ in->dirty = 0;
-+
-+ /* If this was a shrink, then mark the block
-+ * that the chunk lives on */
-+ if (is_shrink) {
-+ bi = yaffs_get_block_info(in->my_dev,
-+ new_chunk_id /
-+ in->my_dev->param.chunks_per_block);
-+ bi->has_shrink_hdr = 1;
-+ }
-+
-+
-+ return new_chunk_id;
-+}
-+
-+/*--------------------- File read/write ------------------------
-+ * Read and write have very similar structures.
-+ * In general the read/write has three parts to it
-+ * An incomplete chunk to start with (if the read/write is not chunk-aligned)
-+ * Some complete chunks
-+ * An incomplete chunk to end off with
-+ *
-+ * Curve-balls: the first chunk might also be the last chunk.
-+ */
-+
-+int yaffs_file_rd(struct yaffs_obj *in, u8 * buffer, loff_t offset, int n_bytes)
-+{
-+ int chunk;
-+ u32 start;
-+ int n_copy;
-+ int n = n_bytes;
-+ int n_done = 0;
-+ struct yaffs_cache *cache;
-+ struct yaffs_dev *dev;
-+
-+ dev = in->my_dev;
-+
-+ while (n > 0) {
-+ yaffs_addr_to_chunk(dev, offset, &chunk, &start);
-+ chunk++;
-+
-+ /* OK now check for the curveball where the start and end are in
-+ * the same chunk.
-+ */
-+ if ((start + n) < dev->data_bytes_per_chunk)
-+ n_copy = n;
-+ else
-+ n_copy = dev->data_bytes_per_chunk - start;
-+
-+ cache = yaffs_find_chunk_cache(in, chunk);
-+
-+ /* If the chunk is already in the cache or it is less than
-+ * a whole chunk or we're using inband tags then use the cache
-+ * (if there is caching) else bypass the cache.
-+ */
-+ if (cache || n_copy != dev->data_bytes_per_chunk ||
-+ dev->param.inband_tags) {
-+ if (dev->param.n_caches > 0) {
-+
-+ /* If we can't find the data in the cache,
-+ * then load it up. */
-+
-+ if (!cache) {
-+ cache =
-+ yaffs_grab_chunk_cache(in->my_dev);
-+ cache->object = in;
-+ cache->chunk_id = chunk;
-+ cache->dirty = 0;
-+ cache->locked = 0;
-+ yaffs_rd_data_obj(in, chunk,
-+ cache->data);
-+ cache->n_bytes = 0;
-+ }
-+
-+ yaffs_use_cache(dev, cache, 0);
-+
-+ cache->locked = 1;
-+
-+ memcpy(buffer, &cache->data[start], n_copy);
-+
-+ cache->locked = 0;
-+ } else {
-+ /* Read into the local buffer then copy.. */
-+
-+ u8 *local_buffer =
-+ yaffs_get_temp_buffer(dev);
-+ yaffs_rd_data_obj(in, chunk, local_buffer);
-+
-+ memcpy(buffer, &local_buffer[start], n_copy);
-+
-+ yaffs_release_temp_buffer(dev, local_buffer);
-+ }
-+ } else {
-+ /* A full chunk. Read directly into the buffer. */
-+ yaffs_rd_data_obj(in, chunk, buffer);
-+ }
-+ n -= n_copy;
-+ offset += n_copy;
-+ buffer += n_copy;
-+ n_done += n_copy;
-+ }
-+ return n_done;
-+}
-+
-+int yaffs_do_file_wr(struct yaffs_obj *in, const u8 *buffer, loff_t offset,
-+ int n_bytes, int write_through)
-+{
-+
-+ int chunk;
-+ u32 start;
-+ int n_copy;
-+ int n = n_bytes;
-+ int n_done = 0;
-+ int n_writeback;
-+ loff_t start_write = offset;
-+ int chunk_written = 0;
-+ u32 n_bytes_read;
-+ loff_t chunk_start;
-+ struct yaffs_dev *dev;
-+
-+ dev = in->my_dev;
-+
-+ while (n > 0 && chunk_written >= 0) {
-+ yaffs_addr_to_chunk(dev, offset, &chunk, &start);
-+
-+ if (((loff_t)chunk) *
-+ dev->data_bytes_per_chunk + start != offset ||
-+ start >= dev->data_bytes_per_chunk) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "AddrToChunk of offset %lld gives chunk %d start %d",
-+ offset, chunk, start);
-+ }
-+ chunk++; /* File pos to chunk in file offset */
-+
-+ /* OK now check for the curveball where the start and end are in
-+ * the same chunk.
-+ */
-+
-+ if ((start + n) < dev->data_bytes_per_chunk) {
-+ n_copy = n;
-+
-+ /* Now calculate how many bytes to write back....
-+ * If we're overwriting and not writing to then end of
-+ * file then we need to write back as much as was there
-+ * before.
-+ */
-+
-+ chunk_start = (((loff_t)(chunk - 1)) *
-+ dev->data_bytes_per_chunk);
-+
-+ if (chunk_start > in->variant.file_variant.file_size)
-+ n_bytes_read = 0; /* Past end of file */
-+ else
-+ n_bytes_read =
-+ in->variant.file_variant.file_size -
-+ chunk_start;
-+
-+ if (n_bytes_read > dev->data_bytes_per_chunk)
-+ n_bytes_read = dev->data_bytes_per_chunk;
-+
-+ n_writeback =
-+ (n_bytes_read >
-+ (start + n)) ? n_bytes_read : (start + n);
-+
-+ if (n_writeback < 0 ||
-+ n_writeback > dev->data_bytes_per_chunk)
-+ BUG();
-+
-+ } else {
-+ n_copy = dev->data_bytes_per_chunk - start;
-+ n_writeback = dev->data_bytes_per_chunk;
-+ }
-+
-+ if (n_copy != dev->data_bytes_per_chunk ||
-+ !dev->param.cache_bypass_aligned ||
-+ dev->param.inband_tags) {
-+ /* An incomplete start or end chunk (or maybe both
-+ * start and end chunk), or we're using inband tags,
-+ * or we're forcing writes through the cache,
-+ * so we want to use the cache buffers.
-+ */
-+ if (dev->param.n_caches > 0) {
-+ struct yaffs_cache *cache;
-+
-+ /* If we can't find the data in the cache, then
-+ * load the cache */
-+ cache = yaffs_find_chunk_cache(in, chunk);
-+
-+ if (!cache &&
-+ yaffs_check_alloc_available(dev, 1)) {
-+ cache = yaffs_grab_chunk_cache(dev);
-+ cache->object = in;
-+ cache->chunk_id = chunk;
-+ cache->dirty = 0;
-+ cache->locked = 0;
-+ yaffs_rd_data_obj(in, chunk,
-+ cache->data);
-+ } else if (cache &&
-+ !cache->dirty &&
-+ !yaffs_check_alloc_available(dev,
-+ 1)) {
-+ /* Drop the cache if it was a read cache
-+ * item and no space check has been made
-+ * for it.
-+ */
-+ cache = NULL;
-+ }
-+
-+ if (cache) {
-+ yaffs_use_cache(dev, cache, 1);
-+ cache->locked = 1;
-+
-+ memcpy(&cache->data[start], buffer,
-+ n_copy);
-+
-+ cache->locked = 0;
-+ cache->n_bytes = n_writeback;
-+
-+ if (write_through) {
-+ chunk_written =
-+ yaffs_wr_data_obj
-+ (cache->object,
-+ cache->chunk_id,
-+ cache->data,
-+ cache->n_bytes, 1);
-+ cache->dirty = 0;
-+ }
-+ } else {
-+ chunk_written = -1; /* fail write */
-+ }
-+ } else {
-+ /* An incomplete start or end chunk (or maybe
-+ * both start and end chunk). Read into the
-+ * local buffer then copy over and write back.
-+ */
-+
-+ u8 *local_buffer = yaffs_get_temp_buffer(dev);
-+
-+ yaffs_rd_data_obj(in, chunk, local_buffer);
-+ memcpy(&local_buffer[start], buffer, n_copy);
-+
-+ chunk_written =
-+ yaffs_wr_data_obj(in, chunk,
-+ local_buffer,
-+ n_writeback, 0);
-+
-+ yaffs_release_temp_buffer(dev, local_buffer);
-+ }
-+ } else {
-+ /* A full chunk. Write directly from the buffer. */
-+
-+ chunk_written =
-+ yaffs_wr_data_obj(in, chunk, buffer,
-+ dev->data_bytes_per_chunk, 0);
-+
-+ /* Since we've overwritten the cached data,
-+ * we better invalidate it. */
-+ yaffs_invalidate_chunk_cache(in, chunk);
-+ }
-+
-+ if (chunk_written >= 0) {
-+ n -= n_copy;
-+ offset += n_copy;
-+ buffer += n_copy;
-+ n_done += n_copy;
-+ }
-+ }
-+
-+ /* Update file object */
-+
-+ if ((start_write + n_done) > in->variant.file_variant.file_size)
-+ in->variant.file_variant.file_size = (start_write + n_done);
-+
-+ in->dirty = 1;
-+ return n_done;
-+}
-+
-+int yaffs_wr_file(struct yaffs_obj *in, const u8 *buffer, loff_t offset,
-+ int n_bytes, int write_through)
-+{
-+ yaffs2_handle_hole(in, offset);
-+ return yaffs_do_file_wr(in, buffer, offset, n_bytes, write_through);
-+}
-+
-+/* ---------------------- File resizing stuff ------------------ */
-+
-+static void yaffs_prune_chunks(struct yaffs_obj *in, loff_t new_size)
-+{
-+
-+ struct yaffs_dev *dev = in->my_dev;
-+ loff_t old_size = in->variant.file_variant.file_size;
-+ int i;
-+ int chunk_id;
-+ u32 dummy;
-+ int last_del;
-+ int start_del;
-+
-+ if (old_size > 0)
-+ yaffs_addr_to_chunk(dev, old_size - 1, &last_del, &dummy);
-+ else
-+ last_del = 0;
-+
-+ yaffs_addr_to_chunk(dev, new_size + dev->data_bytes_per_chunk - 1,
-+ &start_del, &dummy);
-+ last_del++;
-+ start_del++;
-+
-+ /* Delete backwards so that we don't end up with holes if
-+ * power is lost part-way through the operation.
-+ */
-+ for (i = last_del; i >= start_del; i--) {
-+ /* NB this could be optimised somewhat,
-+ * eg. could retrieve the tags and write them without
-+ * using yaffs_chunk_del
-+ */
-+
-+ chunk_id = yaffs_find_del_file_chunk(in, i, NULL);
-+
-+ if (chunk_id < 1)
-+ continue;
-+
-+ if (chunk_id <
-+ (dev->internal_start_block * dev->param.chunks_per_block) ||
-+ chunk_id >=
-+ ((dev->internal_end_block + 1) *
-+ dev->param.chunks_per_block)) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "Found daft chunk_id %d for %d",
-+ chunk_id, i);
-+ } else {
-+ in->n_data_chunks--;
-+ yaffs_chunk_del(dev, chunk_id, 1, __LINE__);
-+ }
-+ }
-+}
-+
-+void yaffs_resize_file_down(struct yaffs_obj *obj, loff_t new_size)
-+{
-+ int new_full;
-+ u32 new_partial;
-+ struct yaffs_dev *dev = obj->my_dev;
-+
-+ yaffs_addr_to_chunk(dev, new_size, &new_full, &new_partial);
-+
-+ yaffs_prune_chunks(obj, new_size);
-+
-+ if (new_partial != 0) {
-+ int last_chunk = 1 + new_full;
-+ u8 *local_buffer = yaffs_get_temp_buffer(dev);
-+
-+ /* Rewrite the last chunk with its new size and zero pad */
-+ yaffs_rd_data_obj(obj, last_chunk, local_buffer);
-+ memset(local_buffer + new_partial, 0,
-+ dev->data_bytes_per_chunk - new_partial);
-+
-+ yaffs_wr_data_obj(obj, last_chunk, local_buffer,
-+ new_partial, 1);
-+
-+ yaffs_release_temp_buffer(dev, local_buffer);
-+ }
-+
-+ obj->variant.file_variant.file_size = new_size;
-+
-+ yaffs_prune_tree(dev, &obj->variant.file_variant);
-+}
-+
-+int yaffs_resize_file(struct yaffs_obj *in, loff_t new_size)
-+{
-+ struct yaffs_dev *dev = in->my_dev;
-+ loff_t old_size = in->variant.file_variant.file_size;
-+
-+ yaffs_flush_file_cache(in);
-+ yaffs_invalidate_whole_cache(in);
-+
-+ yaffs_check_gc(dev, 0);
-+
-+ if (in->variant_type != YAFFS_OBJECT_TYPE_FILE)
-+ return YAFFS_FAIL;
-+
-+ if (new_size == old_size)
-+ return YAFFS_OK;
-+
-+ if (new_size > old_size) {
-+ yaffs2_handle_hole(in, new_size);
-+ in->variant.file_variant.file_size = new_size;
-+ } else {
-+ /* new_size < old_size */
-+ yaffs_resize_file_down(in, new_size);
-+ }
-+
-+ /* Write a new object header to reflect the resize.
-+ * show we've shrunk the file, if need be
-+ * Do this only if the file is not in the deleted directories
-+ * and is not shadowed.
-+ */
-+ if (in->parent &&
-+ !in->is_shadowed &&
-+ in->parent->obj_id != YAFFS_OBJECTID_UNLINKED &&
-+ in->parent->obj_id != YAFFS_OBJECTID_DELETED)
-+ yaffs_update_oh(in, NULL, 0, 0, 0, NULL);
-+
-+ return YAFFS_OK;
-+}
-+
-+int yaffs_flush_file(struct yaffs_obj *in, int update_time, int data_sync)
-+{
-+ if (!in->dirty)
-+ return YAFFS_OK;
-+
-+ yaffs_flush_file_cache(in);
-+
-+ if (data_sync)
-+ return YAFFS_OK;
-+
-+ if (update_time)
-+ yaffs_load_current_time(in, 0, 0);
-+
-+ return (yaffs_update_oh(in, NULL, 0, 0, 0, NULL) >= 0) ?
-+ YAFFS_OK : YAFFS_FAIL;
-+}
-+
-+
-+/* yaffs_del_file deletes the whole file data
-+ * and the inode associated with the file.
-+ * It does not delete the links associated with the file.
-+ */
-+static int yaffs_unlink_file_if_needed(struct yaffs_obj *in)
-+{
-+ int ret_val;
-+ int del_now = 0;
-+ struct yaffs_dev *dev = in->my_dev;
-+
-+ if (!in->my_inode)
-+ del_now = 1;
-+
-+ if (del_now) {
-+ ret_val =
-+ yaffs_change_obj_name(in, in->my_dev->del_dir,
-+ _Y("deleted"), 0, 0);
-+ yaffs_trace(YAFFS_TRACE_TRACING,
-+ "yaffs: immediate deletion of file %d",
-+ in->obj_id);
-+ in->deleted = 1;
-+ in->my_dev->n_deleted_files++;
-+ if (dev->param.disable_soft_del || dev->param.is_yaffs2)
-+ yaffs_resize_file(in, 0);
-+ yaffs_soft_del_file(in);
-+ } else {
-+ ret_val =
-+ yaffs_change_obj_name(in, in->my_dev->unlinked_dir,
-+ _Y("unlinked"), 0, 0);
-+ }
-+ return ret_val;
-+}
-+
-+static int yaffs_del_file(struct yaffs_obj *in)
-+{
-+ int ret_val = YAFFS_OK;
-+ int deleted; /* Need to cache value on stack if in is freed */
-+ struct yaffs_dev *dev = in->my_dev;
-+
-+ if (dev->param.disable_soft_del || dev->param.is_yaffs2)
-+ yaffs_resize_file(in, 0);
-+
-+ if (in->n_data_chunks > 0) {
-+ /* Use soft deletion if there is data in the file.
-+ * That won't be the case if it has been resized to zero.
-+ */
-+ if (!in->unlinked)
-+ ret_val = yaffs_unlink_file_if_needed(in);
-+
-+ deleted = in->deleted;
-+
-+ if (ret_val == YAFFS_OK && in->unlinked && !in->deleted) {
-+ in->deleted = 1;
-+ deleted = 1;
-+ in->my_dev->n_deleted_files++;
-+ yaffs_soft_del_file(in);
-+ }
-+ return deleted ? YAFFS_OK : YAFFS_FAIL;
-+ } else {
-+ /* The file has no data chunks so we toss it immediately */
-+ yaffs_free_tnode(in->my_dev, in->variant.file_variant.top);
-+ in->variant.file_variant.top = NULL;
-+ yaffs_generic_obj_del(in);
-+
-+ return YAFFS_OK;
-+ }
-+}
-+
-+int yaffs_is_non_empty_dir(struct yaffs_obj *obj)
-+{
-+ return (obj &&
-+ obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) &&
-+ !(list_empty(&obj->variant.dir_variant.children));
-+}
-+
-+static int yaffs_del_dir(struct yaffs_obj *obj)
-+{
-+ /* First check that the directory is empty. */
-+ if (yaffs_is_non_empty_dir(obj))
-+ return YAFFS_FAIL;
-+
-+ return yaffs_generic_obj_del(obj);
-+}
-+
-+static int yaffs_del_symlink(struct yaffs_obj *in)
-+{
-+ kfree(in->variant.symlink_variant.alias);
-+ in->variant.symlink_variant.alias = NULL;
-+
-+ return yaffs_generic_obj_del(in);
-+}
-+
-+static int yaffs_del_link(struct yaffs_obj *in)
-+{
-+ /* remove this hardlink from the list associated with the equivalent
-+ * object
-+ */
-+ list_del_init(&in->hard_links);
-+ return yaffs_generic_obj_del(in);
-+}
-+
-+int yaffs_del_obj(struct yaffs_obj *obj)
-+{
-+ int ret_val = -1;
-+
-+ switch (obj->variant_type) {
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ ret_val = yaffs_del_file(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ if (!list_empty(&obj->variant.dir_variant.dirty)) {
-+ yaffs_trace(YAFFS_TRACE_BACKGROUND,
-+ "Remove object %d from dirty directories",
-+ obj->obj_id);
-+ list_del_init(&obj->variant.dir_variant.dirty);
-+ }
-+ return yaffs_del_dir(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ ret_val = yaffs_del_symlink(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ ret_val = yaffs_del_link(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ ret_val = yaffs_generic_obj_del(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ ret_val = 0;
-+ break; /* should not happen. */
-+ }
-+ return ret_val;
-+}
-+
-+
-+static void yaffs_empty_dir_to_dir(struct yaffs_obj *from_dir,
-+ struct yaffs_obj *to_dir)
-+{
-+ struct yaffs_obj *obj;
-+ struct list_head *lh;
-+ struct list_head *n;
-+
-+ list_for_each_safe(lh, n, &from_dir->variant.dir_variant.children) {
-+ obj = list_entry(lh, struct yaffs_obj, siblings);
-+ yaffs_add_obj_to_dir(to_dir, obj);
-+ }
-+}
-+
-+struct yaffs_obj *yaffs_retype_obj(struct yaffs_obj *obj,
-+ enum yaffs_obj_type type)
-+{
-+ /* Tear down the old variant */
-+ switch (obj->variant_type) {
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ /* Nuke file data */
-+ yaffs_resize_file(obj, 0);
-+ yaffs_free_tnode(obj->my_dev, obj->variant.file_variant.top);
-+ obj->variant.file_variant.top = NULL;
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ /* Put the children in lost and found. */
-+ yaffs_empty_dir_to_dir(obj, obj->my_dev->lost_n_found);
-+ if (!list_empty(&obj->variant.dir_variant.dirty))
-+ list_del_init(&obj->variant.dir_variant.dirty);
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ /* Nuke symplink data */
-+ kfree(obj->variant.symlink_variant.alias);
-+ obj->variant.symlink_variant.alias = NULL;
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ list_del_init(&obj->hard_links);
-+ break;
-+ default:
-+ break;
-+ }
-+
-+ memset(&obj->variant, 0, sizeof(obj->variant));
-+
-+ /*Set up new variant if the memset is not enough. */
-+ switch (type) {
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ INIT_LIST_HEAD(&obj->variant.dir_variant.children);
-+ INIT_LIST_HEAD(&obj->variant.dir_variant.dirty);
-+ break;
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ default:
-+ break;
-+ }
-+
-+ obj->variant_type = type;
-+
-+ return obj;
-+
-+}
-+
-+static int yaffs_unlink_worker(struct yaffs_obj *obj)
-+{
-+ int del_now = 0;
-+
-+ if (!obj)
-+ return YAFFS_FAIL;
-+
-+ if (!obj->my_inode)
-+ del_now = 1;
-+
-+ yaffs_update_parent(obj->parent);
-+
-+ if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) {
-+ return yaffs_del_link(obj);
-+ } else if (!list_empty(&obj->hard_links)) {
-+ /* Curve ball: We're unlinking an object that has a hardlink.
-+ *
-+ * This problem arises because we are not strictly following
-+ * The Linux link/inode model.
-+ *
-+ * We can't really delete the object.
-+ * Instead, we do the following:
-+ * - Select a hardlink.
-+ * - Unhook it from the hard links
-+ * - Move it from its parent directory so that the rename works.
-+ * - Rename the object to the hardlink's name.
-+ * - Delete the hardlink
-+ */
-+
-+ struct yaffs_obj *hl;
-+ struct yaffs_obj *parent;
-+ int ret_val;
-+ YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
-+
-+ hl = list_entry(obj->hard_links.next, struct yaffs_obj,
-+ hard_links);
-+
-+ yaffs_get_obj_name(hl, name, YAFFS_MAX_NAME_LENGTH + 1);
-+ parent = hl->parent;
-+
-+ list_del_init(&hl->hard_links);
-+
-+ yaffs_add_obj_to_dir(obj->my_dev->unlinked_dir, hl);
-+
-+ ret_val = yaffs_change_obj_name(obj, parent, name, 0, 0);
-+
-+ if (ret_val == YAFFS_OK)
-+ ret_val = yaffs_generic_obj_del(hl);
-+
-+ return ret_val;
-+
-+ } else if (del_now) {
-+ switch (obj->variant_type) {
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ return yaffs_del_file(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ list_del_init(&obj->variant.dir_variant.dirty);
-+ return yaffs_del_dir(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ return yaffs_del_symlink(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ return yaffs_generic_obj_del(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ default:
-+ return YAFFS_FAIL;
-+ }
-+ } else if (yaffs_is_non_empty_dir(obj)) {
-+ return YAFFS_FAIL;
-+ } else {
-+ return yaffs_change_obj_name(obj, obj->my_dev->unlinked_dir,
-+ _Y("unlinked"), 0, 0);
-+ }
-+}
-+
-+static int yaffs_unlink_obj(struct yaffs_obj *obj)
-+{
-+ if (obj && obj->unlink_allowed)
-+ return yaffs_unlink_worker(obj);
-+
-+ return YAFFS_FAIL;
-+}
-+
-+int yaffs_unlinker(struct yaffs_obj *dir, const YCHAR *name)
-+{
-+ struct yaffs_obj *obj;
-+
-+ obj = yaffs_find_by_name(dir, name);
-+ return yaffs_unlink_obj(obj);
-+}
-+
-+/* Note:
-+ * If old_name is NULL then we take old_dir as the object to be renamed.
-+ */
-+int yaffs_rename_obj(struct yaffs_obj *old_dir, const YCHAR *old_name,
-+ struct yaffs_obj *new_dir, const YCHAR *new_name)
-+{
-+ struct yaffs_obj *obj = NULL;
-+ struct yaffs_obj *existing_target = NULL;
-+ int force = 0;
-+ int result;
-+ struct yaffs_dev *dev;
-+
-+ if (!old_dir || old_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ BUG();
-+ return YAFFS_FAIL;
-+ }
-+ if (!new_dir || new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ BUG();
-+ return YAFFS_FAIL;
-+ }
-+
-+ dev = old_dir->my_dev;
-+
-+#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
-+ /* Special case for case insemsitive systems.
-+ * While look-up is case insensitive, the name isn't.
-+ * Therefore we might want to change x.txt to X.txt
-+ */
-+ if (old_dir == new_dir &&
-+ old_name && new_name &&
-+ strcmp(old_name, new_name) == 0)
-+ force = 1;
-+#endif
-+
-+ if (strnlen(new_name, YAFFS_MAX_NAME_LENGTH + 1) >
-+ YAFFS_MAX_NAME_LENGTH)
-+ /* ENAMETOOLONG */
-+ return YAFFS_FAIL;
-+
-+ if (old_name)
-+ obj = yaffs_find_by_name(old_dir, old_name);
-+ else{
-+ obj = old_dir;
-+ old_dir = obj->parent;
-+ }
-+
-+ if (obj && obj->rename_allowed) {
-+ /* Now handle an existing target, if there is one */
-+ existing_target = yaffs_find_by_name(new_dir, new_name);
-+ if (yaffs_is_non_empty_dir(existing_target)) {
-+ return YAFFS_FAIL; /* ENOTEMPTY */
-+ } else if (existing_target && existing_target != obj) {
-+ /* Nuke the target first, using shadowing,
-+ * but only if it isn't the same object.
-+ *
-+ * Note we must disable gc here otherwise it can mess
-+ * up the shadowing.
-+ *
-+ */
-+ dev->gc_disable = 1;
-+ yaffs_change_obj_name(obj, new_dir, new_name, force,
-+ existing_target->obj_id);
-+ existing_target->is_shadowed = 1;
-+ yaffs_unlink_obj(existing_target);
-+ dev->gc_disable = 0;
-+ }
-+
-+ result = yaffs_change_obj_name(obj, new_dir, new_name, 1, 0);
-+
-+ yaffs_update_parent(old_dir);
-+ if (new_dir != old_dir)
-+ yaffs_update_parent(new_dir);
-+
-+ return result;
-+ }
-+ return YAFFS_FAIL;
-+}
-+
-+/*----------------------- Initialisation Scanning ---------------------- */
-+
-+void yaffs_handle_shadowed_obj(struct yaffs_dev *dev, int obj_id,
-+ int backward_scanning)
-+{
-+ struct yaffs_obj *obj;
-+
-+ if (backward_scanning) {
-+ /* Handle YAFFS2 case (backward scanning)
-+ * If the shadowed object exists then ignore.
-+ */
-+ obj = yaffs_find_by_number(dev, obj_id);
-+ if (obj)
-+ return;
-+ }
-+
-+ /* Let's create it (if it does not exist) assuming it is a file so that
-+ * it can do shrinking etc.
-+ * We put it in unlinked dir to be cleaned up after the scanning
-+ */
-+ obj =
-+ yaffs_find_or_create_by_number(dev, obj_id, YAFFS_OBJECT_TYPE_FILE);
-+ if (!obj)
-+ return;
-+ obj->is_shadowed = 1;
-+ yaffs_add_obj_to_dir(dev->unlinked_dir, obj);
-+ obj->variant.file_variant.shrink_size = 0;
-+ obj->valid = 1; /* So that we don't read any other info. */
-+}
-+
-+void yaffs_link_fixup(struct yaffs_dev *dev, struct list_head *hard_list)
-+{
-+ struct list_head *lh;
-+ struct list_head *save;
-+ struct yaffs_obj *hl;
-+ struct yaffs_obj *in;
-+
-+ list_for_each_safe(lh, save, hard_list) {
-+ hl = list_entry(lh, struct yaffs_obj, hard_links);
-+ in = yaffs_find_by_number(dev,
-+ hl->variant.hardlink_variant.equiv_id);
-+
-+ if (in) {
-+ /* Add the hardlink pointers */
-+ hl->variant.hardlink_variant.equiv_obj = in;
-+ list_add(&hl->hard_links, &in->hard_links);
-+ } else {
-+ /* Todo Need to report/handle this better.
-+ * Got a problem... hardlink to a non-existant object
-+ */
-+ hl->variant.hardlink_variant.equiv_obj = NULL;
-+ INIT_LIST_HEAD(&hl->hard_links);
-+ }
-+ }
-+}
-+
-+static void yaffs_strip_deleted_objs(struct yaffs_dev *dev)
-+{
-+ /*
-+ * Sort out state of unlinked and deleted objects after scanning.
-+ */
-+ struct list_head *i;
-+ struct list_head *n;
-+ struct yaffs_obj *l;
-+
-+ if (dev->read_only)
-+ return;
-+
-+ /* Soft delete all the unlinked files */
-+ list_for_each_safe(i, n,
-+ &dev->unlinked_dir->variant.dir_variant.children) {
-+ l = list_entry(i, struct yaffs_obj, siblings);
-+ yaffs_del_obj(l);
-+ }
-+
-+ list_for_each_safe(i, n, &dev->del_dir->variant.dir_variant.children) {
-+ l = list_entry(i, struct yaffs_obj, siblings);
-+ yaffs_del_obj(l);
-+ }
-+}
-+
-+/*
-+ * This code iterates through all the objects making sure that they are rooted.
-+ * Any unrooted objects are re-rooted in lost+found.
-+ * An object needs to be in one of:
-+ * - Directly under deleted, unlinked
-+ * - Directly or indirectly under root.
-+ *
-+ * Note:
-+ * This code assumes that we don't ever change the current relationships
-+ * between directories:
-+ * root_dir->parent == unlinked_dir->parent == del_dir->parent == NULL
-+ * lost-n-found->parent == root_dir
-+ *
-+ * This fixes the problem where directories might have inadvertently been
-+ * deleted leaving the object "hanging" without being rooted in the
-+ * directory tree.
-+ */
-+
-+static int yaffs_has_null_parent(struct yaffs_dev *dev, struct yaffs_obj *obj)
-+{
-+ return (obj == dev->del_dir ||
-+ obj == dev->unlinked_dir || obj == dev->root_dir);
-+}
-+
-+static void yaffs_fix_hanging_objs(struct yaffs_dev *dev)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_obj *parent;
-+ int i;
-+ struct list_head *lh;
-+ struct list_head *n;
-+ int depth_limit;
-+ int hanging;
-+
-+ if (dev->read_only)
-+ return;
-+
-+ /* Iterate through the objects in each hash entry,
-+ * looking at each object.
-+ * Make sure it is rooted.
-+ */
-+
-+ for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
-+ list_for_each_safe(lh, n, &dev->obj_bucket[i].list) {
-+ obj = list_entry(lh, struct yaffs_obj, hash_link);
-+ parent = obj->parent;
-+
-+ if (yaffs_has_null_parent(dev, obj)) {
-+ /* These directories are not hanging */
-+ hanging = 0;
-+ } else if (!parent ||
-+ parent->variant_type !=
-+ YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ hanging = 1;
-+ } else if (yaffs_has_null_parent(dev, parent)) {
-+ hanging = 0;
-+ } else {
-+ /*
-+ * Need to follow the parent chain to
-+ * see if it is hanging.
-+ */
-+ hanging = 0;
-+ depth_limit = 100;
-+
-+ while (parent != dev->root_dir &&
-+ parent->parent &&
-+ parent->parent->variant_type ==
-+ YAFFS_OBJECT_TYPE_DIRECTORY &&
-+ depth_limit > 0) {
-+ parent = parent->parent;
-+ depth_limit--;
-+ }
-+ if (parent != dev->root_dir)
-+ hanging = 1;
-+ }
-+ if (hanging) {
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ "Hanging object %d moved to lost and found",
-+ obj->obj_id);
-+ yaffs_add_obj_to_dir(dev->lost_n_found, obj);
-+ }
-+ }
-+ }
-+}
-+
-+/*
-+ * Delete directory contents for cleaning up lost and found.
-+ */
-+static void yaffs_del_dir_contents(struct yaffs_obj *dir)
-+{
-+ struct yaffs_obj *obj;
-+ struct list_head *lh;
-+ struct list_head *n;
-+
-+ if (dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
-+ BUG();
-+
-+ list_for_each_safe(lh, n, &dir->variant.dir_variant.children) {
-+ obj = list_entry(lh, struct yaffs_obj, siblings);
-+ if (obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY)
-+ yaffs_del_dir_contents(obj);
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ "Deleting lost_found object %d",
-+ obj->obj_id);
-+ yaffs_unlink_obj(obj);
-+ }
-+}
-+
-+static void yaffs_empty_l_n_f(struct yaffs_dev *dev)
-+{
-+ yaffs_del_dir_contents(dev->lost_n_found);
-+}
-+
-+
-+struct yaffs_obj *yaffs_find_by_name(struct yaffs_obj *directory,
-+ const YCHAR *name)
-+{
-+ int sum;
-+ struct list_head *i;
-+ YCHAR buffer[YAFFS_MAX_NAME_LENGTH + 1];
-+ struct yaffs_obj *l;
-+
-+ if (!name)
-+ return NULL;
-+
-+ if (!directory) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "tragedy: yaffs_find_by_name: null pointer directory"
-+ );
-+ BUG();
-+ return NULL;
-+ }
-+ if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "tragedy: yaffs_find_by_name: non-directory"
-+ );
-+ BUG();
-+ }
-+
-+ sum = yaffs_calc_name_sum(name);
-+
-+ list_for_each(i, &directory->variant.dir_variant.children) {
-+ l = list_entry(i, struct yaffs_obj, siblings);
-+
-+ if (l->parent != directory)
-+ BUG();
-+
-+ yaffs_check_obj_details_loaded(l);
-+
-+ /* Special case for lost-n-found */
-+ if (l->obj_id == YAFFS_OBJECTID_LOSTNFOUND) {
-+ if (!strcmp(name, YAFFS_LOSTNFOUND_NAME))
-+ return l;
-+ } else if (l->sum == sum || l->hdr_chunk <= 0) {
-+ /* LostnFound chunk called Objxxx
-+ * Do a real check
-+ */
-+ yaffs_get_obj_name(l, buffer,
-+ YAFFS_MAX_NAME_LENGTH + 1);
-+ if (!strncmp(name, buffer, YAFFS_MAX_NAME_LENGTH))
-+ return l;
-+ }
-+ }
-+ return NULL;
-+}
-+
-+/* GetEquivalentObject dereferences any hard links to get to the
-+ * actual object.
-+ */
-+
-+struct yaffs_obj *yaffs_get_equivalent_obj(struct yaffs_obj *obj)
-+{
-+ if (obj && obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) {
-+ obj = obj->variant.hardlink_variant.equiv_obj;
-+ yaffs_check_obj_details_loaded(obj);
-+ }
-+ return obj;
-+}
-+
-+/*
-+ * A note or two on object names.
-+ * * If the object name is missing, we then make one up in the form objnnn
-+ *
-+ * * ASCII names are stored in the object header's name field from byte zero
-+ * * Unicode names are historically stored starting from byte zero.
-+ *
-+ * Then there are automatic Unicode names...
-+ * The purpose of these is to save names in a way that can be read as
-+ * ASCII or Unicode names as appropriate, thus allowing a Unicode and ASCII
-+ * system to share files.
-+ *
-+ * These automatic unicode are stored slightly differently...
-+ * - If the name can fit in the ASCII character space then they are saved as
-+ * ascii names as per above.
-+ * - If the name needs Unicode then the name is saved in Unicode
-+ * starting at oh->name[1].
-+
-+ */
-+static void yaffs_fix_null_name(struct yaffs_obj *obj, YCHAR *name,
-+ int buffer_size)
-+{
-+ /* Create an object name if we could not find one. */
-+ if (strnlen(name, YAFFS_MAX_NAME_LENGTH) == 0) {
-+ YCHAR local_name[20];
-+ YCHAR num_string[20];
-+ YCHAR *x = &num_string[19];
-+ unsigned v = obj->obj_id;
-+ num_string[19] = 0;
-+ while (v > 0) {
-+ x--;
-+ *x = '0' + (v % 10);
-+ v /= 10;
-+ }
-+ /* make up a name */
-+ strcpy(local_name, YAFFS_LOSTNFOUND_PREFIX);
-+ strcat(local_name, x);
-+ strncpy(name, local_name, buffer_size - 1);
-+ }
-+}
-+
-+int yaffs_get_obj_name(struct yaffs_obj *obj, YCHAR *name, int buffer_size)
-+{
-+ memset(name, 0, buffer_size * sizeof(YCHAR));
-+ yaffs_check_obj_details_loaded(obj);
-+ if (obj->obj_id == YAFFS_OBJECTID_LOSTNFOUND) {
-+ strncpy(name, YAFFS_LOSTNFOUND_NAME, buffer_size - 1);
-+ } else if (obj->short_name[0]) {
-+ strcpy(name, obj->short_name);
-+ } else if (obj->hdr_chunk > 0) {
-+ int result;
-+ u8 *buffer = yaffs_get_temp_buffer(obj->my_dev);
-+
-+ struct yaffs_obj_hdr *oh = (struct yaffs_obj_hdr *)buffer;
-+
-+ memset(buffer, 0, obj->my_dev->data_bytes_per_chunk);
-+
-+ if (obj->hdr_chunk > 0) {
-+ result = yaffs_rd_chunk_tags_nand(obj->my_dev,
-+ obj->hdr_chunk,
-+ buffer, NULL);
-+ }
-+ yaffs_load_name_from_oh(obj->my_dev, name, oh->name,
-+ buffer_size);
-+
-+ yaffs_release_temp_buffer(obj->my_dev, buffer);
-+ }
-+
-+ yaffs_fix_null_name(obj, name, buffer_size);
-+
-+ return strnlen(name, YAFFS_MAX_NAME_LENGTH);
-+}
-+
-+loff_t yaffs_get_obj_length(struct yaffs_obj *obj)
-+{
-+ /* Dereference any hard linking */
-+ obj = yaffs_get_equivalent_obj(obj);
-+
-+ if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE)
-+ return obj->variant.file_variant.file_size;
-+ if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) {
-+ if (!obj->variant.symlink_variant.alias)
-+ return 0;
-+ return strnlen(obj->variant.symlink_variant.alias,
-+ YAFFS_MAX_ALIAS_LENGTH);
-+ } else {
-+ /* Only a directory should drop through to here */
-+ return obj->my_dev->data_bytes_per_chunk;
-+ }
-+}
-+
-+int yaffs_get_obj_link_count(struct yaffs_obj *obj)
-+{
-+ int count = 0;
-+ struct list_head *i;
-+
-+ if (!obj->unlinked)
-+ count++; /* the object itself */
-+
-+ list_for_each(i, &obj->hard_links)
-+ count++; /* add the hard links; */
-+
-+ return count;
-+}
-+
-+int yaffs_get_obj_inode(struct yaffs_obj *obj)
-+{
-+ obj = yaffs_get_equivalent_obj(obj);
-+
-+ return obj->obj_id;
-+}
-+
-+unsigned yaffs_get_obj_type(struct yaffs_obj *obj)
-+{
-+ obj = yaffs_get_equivalent_obj(obj);
-+
-+ switch (obj->variant_type) {
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ return DT_REG;
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ return DT_DIR;
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ return DT_LNK;
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ return DT_REG;
-+ break;
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ if (S_ISFIFO(obj->yst_mode))
-+ return DT_FIFO;
-+ if (S_ISCHR(obj->yst_mode))
-+ return DT_CHR;
-+ if (S_ISBLK(obj->yst_mode))
-+ return DT_BLK;
-+ if (S_ISSOCK(obj->yst_mode))
-+ return DT_SOCK;
-+ return DT_REG;
-+ break;
-+ default:
-+ return DT_REG;
-+ break;
-+ }
-+}
-+
-+YCHAR *yaffs_get_symlink_alias(struct yaffs_obj *obj)
-+{
-+ obj = yaffs_get_equivalent_obj(obj);
-+ if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK)
-+ return yaffs_clone_str(obj->variant.symlink_variant.alias);
-+ else
-+ return yaffs_clone_str(_Y(""));
-+}
-+
-+/*--------------------------- Initialisation code -------------------------- */
-+
-+static int yaffs_check_dev_fns(struct yaffs_dev *dev)
-+{
-+ struct yaffs_driver *drv = &dev->drv;
-+ struct yaffs_tags_handler *tagger = &dev->tagger;
-+
-+ /* Common functions, gotta have */
-+ if (!drv->drv_read_chunk_fn ||
-+ !drv->drv_write_chunk_fn ||
-+ !drv->drv_erase_fn)
-+ return 0;
-+
-+ if (dev->param.is_yaffs2 &&
-+ (!drv->drv_mark_bad_fn || !drv->drv_check_bad_fn))
-+ return 0;
-+
-+ /* Install the default tags marshalling functions if needed. */
-+ yaffs_tags_compat_install(dev);
-+ yaffs_tags_marshall_install(dev);
-+
-+ /* Check we now have the marshalling functions required. */
-+ if (!tagger->write_chunk_tags_fn ||
-+ !tagger->read_chunk_tags_fn ||
-+ !tagger->query_block_fn ||
-+ !tagger->mark_bad_fn)
-+ return 0;
-+
-+ return 1;
-+}
-+
-+static int yaffs_create_initial_dir(struct yaffs_dev *dev)
-+{
-+ /* Initialise the unlinked, deleted, root and lost+found directories */
-+ dev->lost_n_found = dev->root_dir = NULL;
-+ dev->unlinked_dir = dev->del_dir = NULL;
-+ dev->unlinked_dir =
-+ yaffs_create_fake_dir(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR);
-+ dev->del_dir =
-+ yaffs_create_fake_dir(dev, YAFFS_OBJECTID_DELETED, S_IFDIR);
-+ dev->root_dir =
-+ yaffs_create_fake_dir(dev, YAFFS_OBJECTID_ROOT,
-+ YAFFS_ROOT_MODE | S_IFDIR);
-+ dev->lost_n_found =
-+ yaffs_create_fake_dir(dev, YAFFS_OBJECTID_LOSTNFOUND,
-+ YAFFS_LOSTNFOUND_MODE | S_IFDIR);
-+
-+ if (dev->lost_n_found && dev->root_dir && dev->unlinked_dir
-+ && dev->del_dir) {
-+ yaffs_add_obj_to_dir(dev->root_dir, dev->lost_n_found);
-+ return YAFFS_OK;
-+ }
-+ return YAFFS_FAIL;
-+}
-+
-+/* Low level init.
-+ * Typically only used by yaffs_guts_initialise, but also used by the
-+ * Low level yaffs driver tests.
-+ */
-+
-+int yaffs_guts_ll_init(struct yaffs_dev *dev)
-+{
-+
-+
-+ yaffs_trace(YAFFS_TRACE_TRACING, "yaffs: yaffs_ll_init()");
-+
-+ if (!dev) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs: Need a device"
-+ );
-+ return YAFFS_FAIL;
-+ }
-+
-+ if (dev->ll_init)
-+ return YAFFS_OK;
-+
-+ dev->internal_start_block = dev->param.start_block;
-+ dev->internal_end_block = dev->param.end_block;
-+ dev->block_offset = 0;
-+ dev->chunk_offset = 0;
-+ dev->n_free_chunks = 0;
-+
-+ dev->gc_block = 0;
-+
-+ if (dev->param.start_block == 0) {
-+ dev->internal_start_block = dev->param.start_block + 1;
-+ dev->internal_end_block = dev->param.end_block + 1;
-+ dev->block_offset = 1;
-+ dev->chunk_offset = dev->param.chunks_per_block;
-+ }
-+
-+ /* Check geometry parameters. */
-+
-+ if ((!dev->param.inband_tags && dev->param.is_yaffs2 &&
-+ dev->param.total_bytes_per_chunk < 1024) ||
-+ (!dev->param.is_yaffs2 &&
-+ dev->param.total_bytes_per_chunk < 512) ||
-+ (dev->param.inband_tags && !dev->param.is_yaffs2) ||
-+ dev->param.chunks_per_block < 2 ||
-+ dev->param.n_reserved_blocks < 2 ||
-+ dev->internal_start_block <= 0 ||
-+ dev->internal_end_block <= 0 ||
-+ dev->internal_end_block <=
-+ (dev->internal_start_block + dev->param.n_reserved_blocks + 2)
-+ ) {
-+ /* otherwise it is too small */
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "NAND geometry problems: chunk size %d, type is yaffs%s, inband_tags %d ",
-+ dev->param.total_bytes_per_chunk,
-+ dev->param.is_yaffs2 ? "2" : "",
-+ dev->param.inband_tags);
-+ return YAFFS_FAIL;
-+ }
-+
-+ /* Sort out space for inband tags, if required */
-+ if (dev->param.inband_tags)
-+ dev->data_bytes_per_chunk =
-+ dev->param.total_bytes_per_chunk -
-+ sizeof(struct yaffs_packed_tags2_tags_only);
-+ else
-+ dev->data_bytes_per_chunk = dev->param.total_bytes_per_chunk;
-+
-+ /* Got the right mix of functions? */
-+ if (!yaffs_check_dev_fns(dev)) {
-+ /* Function missing */
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "device function(s) missing or wrong");
-+
-+ return YAFFS_FAIL;
-+ }
-+
-+ if (yaffs_init_nand(dev) != YAFFS_OK) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "InitialiseNAND failed");
-+ return YAFFS_FAIL;
-+ }
-+
-+ return YAFFS_OK;
-+}
-+
-+
-+int yaffs_guts_format_dev(struct yaffs_dev *dev)
-+{
-+ int i;
-+ enum yaffs_block_state state;
-+ u32 dummy;
-+
-+ if(yaffs_guts_ll_init(dev) != YAFFS_OK)
-+ return YAFFS_FAIL;
-+
-+ if(dev->is_mounted)
-+ return YAFFS_FAIL;
-+
-+ for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
-+ yaffs_query_init_block_state(dev, i, &state, &dummy);
-+ if (state != YAFFS_BLOCK_STATE_DEAD)
-+ yaffs_erase_block(dev, i);
-+ }
-+
-+ return YAFFS_OK;
-+}
-+
-+
-+int yaffs_guts_initialise(struct yaffs_dev *dev)
-+{
-+ int init_failed = 0;
-+ unsigned x;
-+ int bits;
-+
-+ if(yaffs_guts_ll_init(dev) != YAFFS_OK)
-+ return YAFFS_FAIL;
-+
-+ if (dev->is_mounted) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "device already mounted");
-+ return YAFFS_FAIL;
-+ }
-+
-+ dev->is_mounted = 1;
-+
-+ /* OK now calculate a few things for the device */
-+
-+ /*
-+ * Calculate all the chunk size manipulation numbers:
-+ */
-+ x = dev->data_bytes_per_chunk;
-+ /* We always use dev->chunk_shift and dev->chunk_div */
-+ dev->chunk_shift = calc_shifts(x);
-+ x >>= dev->chunk_shift;
-+ dev->chunk_div = x;
-+ /* We only use chunk mask if chunk_div is 1 */
-+ dev->chunk_mask = (1 << dev->chunk_shift) - 1;
-+
-+ /*
-+ * Calculate chunk_grp_bits.
-+ * We need to find the next power of 2 > than internal_end_block
-+ */
-+
-+ x = dev->param.chunks_per_block * (dev->internal_end_block + 1);
-+
-+ bits = calc_shifts_ceiling(x);
-+
-+ /* Set up tnode width if wide tnodes are enabled. */
-+ if (!dev->param.wide_tnodes_disabled) {
-+ /* bits must be even so that we end up with 32-bit words */
-+ if (bits & 1)
-+ bits++;
-+ if (bits < 16)
-+ dev->tnode_width = 16;
-+ else
-+ dev->tnode_width = bits;
-+ } else {
-+ dev->tnode_width = 16;
-+ }
-+
-+ dev->tnode_mask = (1 << dev->tnode_width) - 1;
-+
-+ /* Level0 Tnodes are 16 bits or wider (if wide tnodes are enabled),
-+ * so if the bitwidth of the
-+ * chunk range we're using is greater than 16 we need
-+ * to figure out chunk shift and chunk_grp_size
-+ */
-+
-+ if (bits <= dev->tnode_width)
-+ dev->chunk_grp_bits = 0;
-+ else
-+ dev->chunk_grp_bits = bits - dev->tnode_width;
-+
-+ dev->tnode_size = (dev->tnode_width * YAFFS_NTNODES_LEVEL0) / 8;
-+ if (dev->tnode_size < sizeof(struct yaffs_tnode))
-+ dev->tnode_size = sizeof(struct yaffs_tnode);
-+
-+ dev->chunk_grp_size = 1 << dev->chunk_grp_bits;
-+
-+ if (dev->param.chunks_per_block < dev->chunk_grp_size) {
-+ /* We have a problem because the soft delete won't work if
-+ * the chunk group size > chunks per block.
-+ * This can be remedied by using larger "virtual blocks".
-+ */
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "chunk group too large");
-+
-+ return YAFFS_FAIL;
-+ }
-+
-+ /* Finished verifying the device, continue with initialisation */
-+
-+ /* More device initialisation */
-+ dev->all_gcs = 0;
-+ dev->passive_gc_count = 0;
-+ dev->oldest_dirty_gc_count = 0;
-+ dev->bg_gcs = 0;
-+ dev->gc_block_finder = 0;
-+ dev->buffered_block = -1;
-+ dev->doing_buffered_block_rewrite = 0;
-+ dev->n_deleted_files = 0;
-+ dev->n_bg_deletions = 0;
-+ dev->n_unlinked_files = 0;
-+ dev->n_ecc_fixed = 0;
-+ dev->n_ecc_unfixed = 0;
-+ dev->n_tags_ecc_fixed = 0;
-+ dev->n_tags_ecc_unfixed = 0;
-+ dev->n_erase_failures = 0;
-+ dev->n_erased_blocks = 0;
-+ dev->gc_disable = 0;
-+ dev->has_pending_prioritised_gc = 1;
-+ /* Assume the worst for now, will get fixed on first GC */
-+ INIT_LIST_HEAD(&dev->dirty_dirs);
-+ dev->oldest_dirty_seq = 0;
-+ dev->oldest_dirty_block = 0;
-+
-+ /* Initialise temporary buffers and caches. */
-+ if (!yaffs_init_tmp_buffers(dev))
-+ init_failed = 1;
-+
-+ dev->cache = NULL;
-+ dev->gc_cleanup_list = NULL;
-+
-+ if (!init_failed && dev->param.n_caches > 0) {
-+ int i;
-+ void *buf;
-+ int cache_bytes =
-+ dev->param.n_caches * sizeof(struct yaffs_cache);
-+
-+ if (dev->param.n_caches > YAFFS_MAX_SHORT_OP_CACHES)
-+ dev->param.n_caches = YAFFS_MAX_SHORT_OP_CACHES;
-+
-+ dev->cache = kmalloc(cache_bytes, GFP_NOFS);
-+
-+ buf = (u8 *) dev->cache;
-+
-+ if (dev->cache)
-+ memset(dev->cache, 0, cache_bytes);
-+
-+ for (i = 0; i < dev->param.n_caches && buf; i++) {
-+ dev->cache[i].object = NULL;
-+ dev->cache[i].last_use = 0;
-+ dev->cache[i].dirty = 0;
-+ dev->cache[i].data = buf =
-+ kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS);
-+ }
-+ if (!buf)
-+ init_failed = 1;
-+
-+ dev->cache_last_use = 0;
-+ }
-+
-+ dev->cache_hits = 0;
-+
-+ if (!init_failed) {
-+ dev->gc_cleanup_list =
-+ kmalloc(dev->param.chunks_per_block * sizeof(u32),
-+ GFP_NOFS);
-+ if (!dev->gc_cleanup_list)
-+ init_failed = 1;
-+ }
-+
-+ if (dev->param.is_yaffs2)
-+ dev->param.use_header_file_size = 1;
-+
-+ if (!init_failed && !yaffs_init_blocks(dev))
-+ init_failed = 1;
-+
-+ yaffs_init_tnodes_and_objs(dev);
-+
-+ if (!init_failed && !yaffs_create_initial_dir(dev))
-+ init_failed = 1;
-+
-+ if (!init_failed && dev->param.is_yaffs2 &&
-+ !dev->param.disable_summary &&
-+ !yaffs_summary_init(dev))
-+ init_failed = 1;
-+
-+ if (!init_failed) {
-+ /* Now scan the flash. */
-+ if (dev->param.is_yaffs2) {
-+ if (yaffs2_checkpt_restore(dev)) {
-+ yaffs_check_obj_details_loaded(dev->root_dir);
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT |
-+ YAFFS_TRACE_MOUNT,
-+ "yaffs: restored from checkpoint"
-+ );
-+ } else {
-+
-+ /* Clean up the mess caused by an aborted
-+ * checkpoint load then scan backwards.
-+ */
-+ yaffs_deinit_blocks(dev);
-+
-+ yaffs_deinit_tnodes_and_objs(dev);
-+
-+ dev->n_erased_blocks = 0;
-+ dev->n_free_chunks = 0;
-+ dev->alloc_block = -1;
-+ dev->alloc_page = -1;
-+ dev->n_deleted_files = 0;
-+ dev->n_unlinked_files = 0;
-+ dev->n_bg_deletions = 0;
-+
-+ if (!init_failed && !yaffs_init_blocks(dev))
-+ init_failed = 1;
-+
-+ yaffs_init_tnodes_and_objs(dev);
-+
-+ if (!init_failed
-+ && !yaffs_create_initial_dir(dev))
-+ init_failed = 1;
-+
-+ if (!init_failed && !yaffs2_scan_backwards(dev))
-+ init_failed = 1;
-+ }
-+ } else if (!yaffs1_scan(dev)) {
-+ init_failed = 1;
-+ }
-+
-+ yaffs_strip_deleted_objs(dev);
-+ yaffs_fix_hanging_objs(dev);
-+ if (dev->param.empty_lost_n_found)
-+ yaffs_empty_l_n_f(dev);
-+ }
-+
-+ if (init_failed) {
-+ /* Clean up the mess */
-+ yaffs_trace(YAFFS_TRACE_TRACING,
-+ "yaffs: yaffs_guts_initialise() aborted.");
-+
-+ yaffs_deinitialise(dev);
-+ return YAFFS_FAIL;
-+ }
-+
-+ /* Zero out stats */
-+ dev->n_page_reads = 0;
-+ dev->n_page_writes = 0;
-+ dev->n_erasures = 0;
-+ dev->n_gc_copies = 0;
-+ dev->n_retried_writes = 0;
-+
-+ dev->n_retired_blocks = 0;
-+
-+ yaffs_verify_free_chunks(dev);
-+ yaffs_verify_blocks(dev);
-+
-+ /* Clean up any aborted checkpoint data */
-+ if (!dev->is_checkpointed && dev->blocks_in_checkpt > 0)
-+ yaffs2_checkpt_invalidate(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_TRACING,
-+ "yaffs: yaffs_guts_initialise() done.");
-+ return YAFFS_OK;
-+}
-+
-+void yaffs_deinitialise(struct yaffs_dev *dev)
-+{
-+ if (dev->is_mounted) {
-+ int i;
-+
-+ yaffs_deinit_blocks(dev);
-+ yaffs_deinit_tnodes_and_objs(dev);
-+ yaffs_summary_deinit(dev);
-+
-+ if (dev->param.n_caches > 0 && dev->cache) {
-+
-+ for (i = 0; i < dev->param.n_caches; i++) {
-+ kfree(dev->cache[i].data);
-+ dev->cache[i].data = NULL;
-+ }
-+
-+ kfree(dev->cache);
-+ dev->cache = NULL;
-+ }
-+
-+ kfree(dev->gc_cleanup_list);
-+
-+ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
-+ kfree(dev->temp_buffer[i].buffer);
-+
-+ dev->is_mounted = 0;
-+
-+ yaffs_deinit_nand(dev);
-+ }
-+}
-+
-+int yaffs_count_free_chunks(struct yaffs_dev *dev)
-+{
-+ int n_free = 0;
-+ int b;
-+ struct yaffs_block_info *blk;
-+
-+ blk = dev->block_info;
-+ for (b = dev->internal_start_block; b <= dev->internal_end_block; b++) {
-+ switch (blk->block_state) {
-+ case YAFFS_BLOCK_STATE_EMPTY:
-+ case YAFFS_BLOCK_STATE_ALLOCATING:
-+ case YAFFS_BLOCK_STATE_COLLECTING:
-+ case YAFFS_BLOCK_STATE_FULL:
-+ n_free +=
-+ (dev->param.chunks_per_block - blk->pages_in_use +
-+ blk->soft_del_pages);
-+ break;
-+ default:
-+ break;
-+ }
-+ blk++;
-+ }
-+ return n_free;
-+}
-+
-+int yaffs_get_n_free_chunks(struct yaffs_dev *dev)
-+{
-+ /* This is what we report to the outside world */
-+ int n_free;
-+ int n_dirty_caches;
-+ int blocks_for_checkpt;
-+ int i;
-+
-+ n_free = dev->n_free_chunks;
-+ n_free += dev->n_deleted_files;
-+
-+ /* Now count and subtract the number of dirty chunks in the cache. */
-+
-+ for (n_dirty_caches = 0, i = 0; i < dev->param.n_caches; i++) {
-+ if (dev->cache[i].dirty)
-+ n_dirty_caches++;
-+ }
-+
-+ n_free -= n_dirty_caches;
-+
-+ n_free -=
-+ ((dev->param.n_reserved_blocks + 1) * dev->param.chunks_per_block);
-+
-+ /* Now figure checkpoint space and report that... */
-+ blocks_for_checkpt = yaffs_calc_checkpt_blocks_required(dev);
-+
-+ n_free -= (blocks_for_checkpt * dev->param.chunks_per_block);
-+
-+ if (n_free < 0)
-+ n_free = 0;
-+
-+ return n_free;
-+}
-+
-+
-+
-+/*
-+ * Marshalling functions to get loff_t file sizes into and out of
-+ * object headers.
-+ */
-+void yaffs_oh_size_load(struct yaffs_obj_hdr *oh, loff_t fsize)
-+{
-+ oh->file_size_low = (fsize & 0xFFFFFFFF);
-+ oh->file_size_high = ((fsize >> 32) & 0xFFFFFFFF);
-+}
-+
-+loff_t yaffs_oh_to_size(struct yaffs_obj_hdr *oh)
-+{
-+ loff_t retval;
-+
-+ if (sizeof(loff_t) >= 8 && ~(oh->file_size_high))
-+ retval = (((loff_t) oh->file_size_high) << 32) |
-+ (((loff_t) oh->file_size_low) & 0xFFFFFFFF);
-+ else
-+ retval = (loff_t) oh->file_size_low;
-+
-+ return retval;
-+}
-+
-+
-+void yaffs_count_blocks_by_state(struct yaffs_dev *dev, int bs[10])
-+{
-+ int i;
-+ struct yaffs_block_info *bi;
-+ int s;
-+
-+ for(i = 0; i < 10; i++)
-+ bs[i] = 0;
-+
-+ for(i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
-+ bi = yaffs_get_block_info(dev, i);
-+ s = bi->block_state;
-+ if(s > YAFFS_BLOCK_STATE_DEAD || s < YAFFS_BLOCK_STATE_UNKNOWN)
-+ bs[0]++;
-+ else
-+ bs[s]++;
-+ }
-+}
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_guts.h linux-3.12.20/fs/yaffs2/yaffs_guts.h
---- linux-3.12.20.orig/fs/yaffs2/yaffs_guts.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_guts.h 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,1007 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_GUTS_H__
-+#define __YAFFS_GUTS_H__
-+
-+#include "yportenv.h"
-+
-+#define YAFFS_OK 1
-+#define YAFFS_FAIL 0
-+
-+/* Give us a Y=0x59,
-+ * Give us an A=0x41,
-+ * Give us an FF=0xff
-+ * Give us an S=0x53
-+ * And what have we got...
-+ */
-+#define YAFFS_MAGIC 0x5941ff53
-+
-+/*
-+ * Tnodes form a tree with the tnodes in "levels"
-+ * Levels greater than 0 hold 8 slots which point to other tnodes.
-+ * Those at level 0 hold 16 slots which point to chunks in NAND.
-+ *
-+ * A maximum level of 8 thust supports files of size up to:
-+ *
-+ * 2^(3*MAX_LEVEL+4)
-+ *
-+ * Thus a max level of 8 supports files with up to 2^^28 chunks which gives
-+ * a maximum file size of around 512Gbytees with 2k chunks.
-+ */
-+#define YAFFS_NTNODES_LEVEL0 16
-+#define YAFFS_TNODES_LEVEL0_BITS 4
-+#define YAFFS_TNODES_LEVEL0_MASK 0xf
-+
-+#define YAFFS_NTNODES_INTERNAL (YAFFS_NTNODES_LEVEL0 / 2)
-+#define YAFFS_TNODES_INTERNAL_BITS (YAFFS_TNODES_LEVEL0_BITS - 1)
-+#define YAFFS_TNODES_INTERNAL_MASK 0x7
-+#define YAFFS_TNODES_MAX_LEVEL 8
-+#define YAFFS_TNODES_MAX_BITS (YAFFS_TNODES_LEVEL0_BITS + \
-+ YAFFS_TNODES_INTERNAL_BITS * \
-+ YAFFS_TNODES_MAX_LEVEL)
-+#define YAFFS_MAX_CHUNK_ID ((1 << YAFFS_TNODES_MAX_BITS) - 1)
-+
-+#define YAFFS_MAX_FILE_SIZE_32 0x7fffffff
-+
-+/* Constants for YAFFS1 mode */
-+#define YAFFS_BYTES_PER_SPARE 16
-+#define YAFFS_BYTES_PER_CHUNK 512
-+#define YAFFS_CHUNK_SIZE_SHIFT 9
-+#define YAFFS_CHUNKS_PER_BLOCK 32
-+#define YAFFS_BYTES_PER_BLOCK (YAFFS_CHUNKS_PER_BLOCK*YAFFS_BYTES_PER_CHUNK)
-+
-+#define YAFFS_MIN_YAFFS2_CHUNK_SIZE 1024
-+#define YAFFS_MIN_YAFFS2_SPARE_SIZE 32
-+
-+
-+
-+#define YAFFS_ALLOCATION_NOBJECTS 100
-+#define YAFFS_ALLOCATION_NTNODES 100
-+#define YAFFS_ALLOCATION_NLINKS 100
-+
-+#define YAFFS_NOBJECT_BUCKETS 256
-+
-+#define YAFFS_OBJECT_SPACE 0x40000
-+#define YAFFS_MAX_OBJECT_ID (YAFFS_OBJECT_SPACE - 1)
-+
-+/* Binary data version stamps */
-+#define YAFFS_SUMMARY_VERSION 1
-+#define YAFFS_CHECKPOINT_VERSION 7
-+
-+#ifdef CONFIG_YAFFS_UNICODE
-+#define YAFFS_MAX_NAME_LENGTH 127
-+#define YAFFS_MAX_ALIAS_LENGTH 79
-+#else
-+#define YAFFS_MAX_NAME_LENGTH 255
-+#define YAFFS_MAX_ALIAS_LENGTH 159
-+#endif
-+
-+#define YAFFS_SHORT_NAME_LENGTH 15
-+
-+/* Some special object ids for pseudo objects */
-+#define YAFFS_OBJECTID_ROOT 1
-+#define YAFFS_OBJECTID_LOSTNFOUND 2
-+#define YAFFS_OBJECTID_UNLINKED 3
-+#define YAFFS_OBJECTID_DELETED 4
-+
-+/* Fake object Id for summary data */
-+#define YAFFS_OBJECTID_SUMMARY 0x10
-+
-+/* Pseudo object ids for checkpointing */
-+#define YAFFS_OBJECTID_CHECKPOINT_DATA 0x20
-+#define YAFFS_SEQUENCE_CHECKPOINT_DATA 0x21
-+
-+#define YAFFS_MAX_SHORT_OP_CACHES 20
-+
-+#define YAFFS_N_TEMP_BUFFERS 6
-+
-+/* We limit the number attempts at sucessfully saving a chunk of data.
-+ * Small-page devices have 32 pages per block; large-page devices have 64.
-+ * Default to something in the order of 5 to 10 blocks worth of chunks.
-+ */
-+#define YAFFS_WR_ATTEMPTS (5*64)
-+
-+/* Sequence numbers are used in YAFFS2 to determine block allocation order.
-+ * The range is limited slightly to help distinguish bad numbers from good.
-+ * This also allows us to perhaps in the future use special numbers for
-+ * special purposes.
-+ * EFFFFF00 allows the allocation of 8 blocks/second (~1Mbytes) for 15 years,
-+ * and is a larger number than the lifetime of a 2GB device.
-+ */
-+#define YAFFS_LOWEST_SEQUENCE_NUMBER 0x00001000
-+#define YAFFS_HIGHEST_SEQUENCE_NUMBER 0xefffff00
-+
-+/* Special sequence number for bad block that failed to be marked bad */
-+#define YAFFS_SEQUENCE_BAD_BLOCK 0xffff0000
-+
-+/* ChunkCache is used for short read/write operations.*/
-+struct yaffs_cache {
-+ struct yaffs_obj *object;
-+ int chunk_id;
-+ int last_use;
-+ int dirty;
-+ int n_bytes; /* Only valid if the cache is dirty */
-+ int locked; /* Can't push out or flush while locked. */
-+ u8 *data;
-+};
-+
-+/* yaffs1 tags structures in RAM
-+ * NB This uses bitfield. Bitfields should not straddle a u32 boundary
-+ * otherwise the structure size will get blown out.
-+ */
-+
-+struct yaffs_tags {
-+ u32 chunk_id:20;
-+ u32 serial_number:2;
-+ u32 n_bytes_lsb:10;
-+ u32 obj_id:18;
-+ u32 ecc:12;
-+ u32 n_bytes_msb:2;
-+};
-+
-+union yaffs_tags_union {
-+ struct yaffs_tags as_tags;
-+ u8 as_bytes[8];
-+};
-+
-+
-+/* Stuff used for extended tags in YAFFS2 */
-+
-+enum yaffs_ecc_result {
-+ YAFFS_ECC_RESULT_UNKNOWN,
-+ YAFFS_ECC_RESULT_NO_ERROR,
-+ YAFFS_ECC_RESULT_FIXED,
-+ YAFFS_ECC_RESULT_UNFIXED
-+};
-+
-+enum yaffs_obj_type {
-+ YAFFS_OBJECT_TYPE_UNKNOWN,
-+ YAFFS_OBJECT_TYPE_FILE,
-+ YAFFS_OBJECT_TYPE_SYMLINK,
-+ YAFFS_OBJECT_TYPE_DIRECTORY,
-+ YAFFS_OBJECT_TYPE_HARDLINK,
-+ YAFFS_OBJECT_TYPE_SPECIAL
-+};
-+
-+#define YAFFS_OBJECT_TYPE_MAX YAFFS_OBJECT_TYPE_SPECIAL
-+
-+struct yaffs_ext_tags {
-+ unsigned chunk_used; /* Status of the chunk: used or unused */
-+ unsigned obj_id; /* If 0 this is not used */
-+ unsigned chunk_id; /* If 0 this is a header, else a data chunk */
-+ unsigned n_bytes; /* Only valid for data chunks */
-+
-+ /* The following stuff only has meaning when we read */
-+ enum yaffs_ecc_result ecc_result;
-+ unsigned block_bad;
-+
-+ /* YAFFS 1 stuff */
-+ unsigned is_deleted; /* The chunk is marked deleted */
-+ unsigned serial_number; /* Yaffs1 2-bit serial number */
-+
-+ /* YAFFS2 stuff */
-+ unsigned seq_number; /* The sequence number of this block */
-+
-+ /* Extra info if this is an object header (YAFFS2 only) */
-+
-+ unsigned extra_available; /* Extra info available if not zero */
-+ unsigned extra_parent_id; /* The parent object */
-+ unsigned extra_is_shrink; /* Is it a shrink header? */
-+ unsigned extra_shadows; /* Does this shadow another object? */
-+
-+ enum yaffs_obj_type extra_obj_type; /* What object type? */
-+
-+ loff_t extra_file_size; /* Length if it is a file */
-+ unsigned extra_equiv_id; /* Equivalent object for a hard link */
-+};
-+
-+/* Spare structure for YAFFS1 */
-+struct yaffs_spare {
-+ u8 tb0;
-+ u8 tb1;
-+ u8 tb2;
-+ u8 tb3;
-+ u8 page_status; /* set to 0 to delete the chunk */
-+ u8 block_status;
-+ u8 tb4;
-+ u8 tb5;
-+ u8 ecc1[3];
-+ u8 tb6;
-+ u8 tb7;
-+ u8 ecc2[3];
-+};
-+
-+/*Special structure for passing through to mtd */
-+struct yaffs_nand_spare {
-+ struct yaffs_spare spare;
-+ int eccres1;
-+ int eccres2;
-+};
-+
-+/* Block data in RAM */
-+
-+enum yaffs_block_state {
-+ YAFFS_BLOCK_STATE_UNKNOWN = 0,
-+
-+ YAFFS_BLOCK_STATE_SCANNING,
-+ /* Being scanned */
-+
-+ YAFFS_BLOCK_STATE_NEEDS_SCAN,
-+ /* The block might have something on it (ie it is allocating or full,
-+ * perhaps empty) but it needs to be scanned to determine its true
-+ * state.
-+ * This state is only valid during scanning.
-+ * NB We tolerate empty because the pre-scanner might be incapable of
-+ * deciding
-+ * However, if this state is returned on a YAFFS2 device,
-+ * then we expect a sequence number
-+ */
-+
-+ YAFFS_BLOCK_STATE_EMPTY,
-+ /* This block is empty */
-+
-+ YAFFS_BLOCK_STATE_ALLOCATING,
-+ /* This block is partially allocated.
-+ * At least one page holds valid data.
-+ * This is the one currently being used for page
-+ * allocation. Should never be more than one of these.
-+ * If a block is only partially allocated at mount it is treated as
-+ * full.
-+ */
-+
-+ YAFFS_BLOCK_STATE_FULL,
-+ /* All the pages in this block have been allocated.
-+ * If a block was only partially allocated when mounted we treat
-+ * it as fully allocated.
-+ */
-+
-+ YAFFS_BLOCK_STATE_DIRTY,
-+ /* The block was full and now all chunks have been deleted.
-+ * Erase me, reuse me.
-+ */
-+
-+ YAFFS_BLOCK_STATE_CHECKPOINT,
-+ /* This block is assigned to holding checkpoint data. */
-+
-+ YAFFS_BLOCK_STATE_COLLECTING,
-+ /* This block is being garbage collected */
-+
-+ YAFFS_BLOCK_STATE_DEAD
-+ /* This block has failed and is not in use */
-+};
-+
-+#define YAFFS_NUMBER_OF_BLOCK_STATES (YAFFS_BLOCK_STATE_DEAD + 1)
-+
-+struct yaffs_block_info {
-+
-+ s32 soft_del_pages:10; /* number of soft deleted pages */
-+ s32 pages_in_use:10; /* number of pages in use */
-+ u32 block_state:4; /* One of the above block states. */
-+ /* NB use unsigned because enum is sometimes
-+ * an int */
-+ u32 needs_retiring:1; /* Data has failed on this block, */
-+ /*need to get valid data off and retire*/
-+ u32 skip_erased_check:1;/* Skip the erased check on this block */
-+ u32 gc_prioritise:1; /* An ECC check or blank check has failed.
-+ Block should be prioritised for GC */
-+ u32 chunk_error_strikes:3; /* How many times we've had ecc etc
-+ failures on this block and tried to reuse it */
-+ u32 has_summary:1; /* The block has a summary */
-+
-+ u32 has_shrink_hdr:1; /* This block has at least one shrink header */
-+ u32 seq_number; /* block sequence number for yaffs2 */
-+
-+};
-+
-+/* -------------------------- Object structure -------------------------------*/
-+/* This is the object structure as stored on NAND */
-+
-+struct yaffs_obj_hdr {
-+ enum yaffs_obj_type type;
-+
-+ /* Apply to everything */
-+ int parent_obj_id;
-+ u16 sum_no_longer_used; /* checksum of name. No longer used */
-+ YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
-+
-+ /* The following apply to all object types except for hard links */
-+ u32 yst_mode; /* protection */
-+
-+ u32 yst_uid;
-+ u32 yst_gid;
-+ u32 yst_atime;
-+ u32 yst_mtime;
-+ u32 yst_ctime;
-+
-+ /* File size applies to files only */
-+ u32 file_size_low;
-+
-+ /* Equivalent object id applies to hard links only. */
-+ int equiv_id;
-+
-+ /* Alias is for symlinks only. */
-+ YCHAR alias[YAFFS_MAX_ALIAS_LENGTH + 1];
-+
-+ u32 yst_rdev; /* stuff for block and char devices (major/min) */
-+
-+ u32 win_ctime[2];
-+ u32 win_atime[2];
-+ u32 win_mtime[2];
-+
-+ u32 inband_shadowed_obj_id;
-+ u32 inband_is_shrink;
-+
-+ u32 file_size_high;
-+ u32 reserved[1];
-+ int shadows_obj; /* This object header shadows the
-+ specified object if > 0 */
-+
-+ /* is_shrink applies to object headers written when wemake a hole. */
-+ u32 is_shrink;
-+
-+};
-+
-+/*--------------------------- Tnode -------------------------- */
-+
-+struct yaffs_tnode {
-+ struct yaffs_tnode *internal[YAFFS_NTNODES_INTERNAL];
-+};
-+
-+/*------------------------ Object -----------------------------*/
-+/* An object can be one of:
-+ * - a directory (no data, has children links
-+ * - a regular file (data.... not prunes :->).
-+ * - a symlink [symbolic link] (the alias).
-+ * - a hard link
-+ */
-+
-+struct yaffs_file_var {
-+ loff_t file_size;
-+ loff_t scanned_size;
-+ loff_t shrink_size;
-+ int top_level;
-+ struct yaffs_tnode *top;
-+};
-+
-+struct yaffs_dir_var {
-+ struct list_head children; /* list of child links */
-+ struct list_head dirty; /* Entry for list of dirty directories */
-+};
-+
-+struct yaffs_symlink_var {
-+ YCHAR *alias;
-+};
-+
-+struct yaffs_hardlink_var {
-+ struct yaffs_obj *equiv_obj;
-+ u32 equiv_id;
-+};
-+
-+union yaffs_obj_var {
-+ struct yaffs_file_var file_variant;
-+ struct yaffs_dir_var dir_variant;
-+ struct yaffs_symlink_var symlink_variant;
-+ struct yaffs_hardlink_var hardlink_variant;
-+};
-+
-+struct yaffs_obj {
-+ u8 deleted:1; /* This should only apply to unlinked files. */
-+ u8 soft_del:1; /* it has also been soft deleted */
-+ u8 unlinked:1; /* An unlinked file.*/
-+ u8 fake:1; /* A fake object has no presence on NAND. */
-+ u8 rename_allowed:1; /* Some objects cannot be renamed. */
-+ u8 unlink_allowed:1;
-+ u8 dirty:1; /* the object needs to be written to flash */
-+ u8 valid:1; /* When the file system is being loaded up, this
-+ * object might be created before the data
-+ * is available
-+ * ie. file data chunks encountered before
-+ * the header.
-+ */
-+ u8 lazy_loaded:1; /* This object has been lazy loaded and
-+ * is missing some detail */
-+
-+ u8 defered_free:1; /* Object is removed from NAND, but is
-+ * still in the inode cache.
-+ * Free of object is defered.
-+ * until the inode is released.
-+ */
-+ u8 being_created:1; /* This object is still being created
-+ * so skip some verification checks. */
-+ u8 is_shadowed:1; /* This object is shadowed on the way
-+ * to being renamed. */
-+
-+ u8 xattr_known:1; /* We know if this has object has xattribs
-+ * or not. */
-+ u8 has_xattr:1; /* This object has xattribs.
-+ * Only valid if xattr_known. */
-+
-+ u8 serial; /* serial number of chunk in NAND.*/
-+ u16 sum; /* sum of the name to speed searching */
-+
-+ struct yaffs_dev *my_dev; /* The device I'm on */
-+
-+ struct list_head hash_link; /* list of objects in hash bucket */
-+
-+ struct list_head hard_links; /* hard linked object chain*/
-+
-+ /* directory structure stuff */
-+ /* also used for linking up the free list */
-+ struct yaffs_obj *parent;
-+ struct list_head siblings;
-+
-+ /* Where's my object header in NAND? */
-+ int hdr_chunk;
-+
-+ int n_data_chunks; /* Number of data chunks for this file. */
-+
-+ u32 obj_id; /* the object id value */
-+
-+ u32 yst_mode;
-+
-+ YCHAR short_name[YAFFS_SHORT_NAME_LENGTH + 1];
-+
-+#ifdef CONFIG_YAFFS_WINCE
-+ u32 win_ctime[2];
-+ u32 win_mtime[2];
-+ u32 win_atime[2];
-+#else
-+ u32 yst_uid;
-+ u32 yst_gid;
-+ u32 yst_atime;
-+ u32 yst_mtime;
-+ u32 yst_ctime;
-+#endif
-+
-+ u32 yst_rdev;
-+
-+ void *my_inode;
-+
-+ enum yaffs_obj_type variant_type;
-+
-+ union yaffs_obj_var variant;
-+
-+};
-+
-+struct yaffs_obj_bucket {
-+ struct list_head list;
-+ int count;
-+};
-+
-+/* yaffs_checkpt_obj holds the definition of an object as dumped
-+ * by checkpointing.
-+ */
-+
-+struct yaffs_checkpt_obj {
-+ int struct_type;
-+ u32 obj_id;
-+ u32 parent_id;
-+ int hdr_chunk;
-+ enum yaffs_obj_type variant_type:3;
-+ u8 deleted:1;
-+ u8 soft_del:1;
-+ u8 unlinked:1;
-+ u8 fake:1;
-+ u8 rename_allowed:1;
-+ u8 unlink_allowed:1;
-+ u8 serial;
-+ int n_data_chunks;
-+ loff_t size_or_equiv_obj;
-+};
-+
-+/*--------------------- Temporary buffers ----------------
-+ *
-+ * These are chunk-sized working buffers. Each device has a few.
-+ */
-+
-+struct yaffs_buffer {
-+ u8 *buffer;
-+ int in_use;
-+};
-+
-+/*----------------- Device ---------------------------------*/
-+
-+struct yaffs_param {
-+ const YCHAR *name;
-+
-+ /*
-+ * Entry parameters set up way early. Yaffs sets up the rest.
-+ * The structure should be zeroed out before use so that unused
-+ * and default values are zero.
-+ */
-+
-+ int inband_tags; /* Use unband tags */
-+ u32 total_bytes_per_chunk; /* Should be >= 512, does not need to
-+ be a power of 2 */
-+ int chunks_per_block; /* does not need to be a power of 2 */
-+ int spare_bytes_per_chunk; /* spare area size */
-+ int start_block; /* Start block we're allowed to use */
-+ int end_block; /* End block we're allowed to use */
-+ int n_reserved_blocks; /* Tuneable so that we can reduce
-+ * reserved blocks on NOR and RAM. */
-+
-+ int n_caches; /* If <= 0, then short op caching is disabled,
-+ * else the number of short op caches.
-+ */
-+ int cache_bypass_aligned; /* If non-zero then bypass the cache for
-+ * aligned writes.
-+ */
-+
-+ int use_nand_ecc; /* Flag to decide whether or not to use
-+ * NAND driver ECC on data (yaffs1) */
-+ int tags_9bytes; /* Use 9 byte tags */
-+ int no_tags_ecc; /* Flag to decide whether or not to do ECC
-+ * on packed tags (yaffs2) */
-+
-+ int is_yaffs2; /* Use yaffs2 mode on this device */
-+
-+ int empty_lost_n_found; /* Auto-empty lost+found directory on mount */
-+
-+ int refresh_period; /* How often to check for a block refresh */
-+
-+ /* Checkpoint control. Can be set before or after initialisation */
-+ u8 skip_checkpt_rd;
-+ u8 skip_checkpt_wr;
-+
-+ int enable_xattr; /* Enable xattribs */
-+
-+ int max_objects; /*
-+ * Set to limit the number of objects created.
-+ * 0 = no limit.
-+ */
-+
-+ /* The remove_obj_fn function must be supplied by OS flavours that
-+ * need it.
-+ * yaffs direct uses it to implement the faster readdir.
-+ * Linux uses it to protect the directory during unlocking.
-+ */
-+ void (*remove_obj_fn) (struct yaffs_obj *obj);
-+
-+ /* Callback to mark the superblock dirty */
-+ void (*sb_dirty_fn) (struct yaffs_dev *dev);
-+
-+ /* Callback to control garbage collection. */
-+ unsigned (*gc_control_fn) (struct yaffs_dev *dev);
-+
-+ /* Debug control flags. Don't use unless you know what you're doing */
-+ int use_header_file_size; /* Flag to determine if we should use
-+ * file sizes from the header */
-+ int disable_lazy_load; /* Disable lazy loading on this device */
-+ int wide_tnodes_disabled; /* Set to disable wide tnodes */
-+ int disable_soft_del; /* yaffs 1 only: Set to disable the use of
-+ * softdeletion. */
-+
-+ int defered_dir_update; /* Set to defer directory updates */
-+
-+#ifdef CONFIG_YAFFS_AUTO_UNICODE
-+ int auto_unicode;
-+#endif
-+ int always_check_erased; /* Force chunk erased check always on */
-+
-+ int disable_summary;
-+ int disable_bad_block_marking;
-+
-+};
-+
-+struct yaffs_driver {
-+ int (*drv_write_chunk_fn) (struct yaffs_dev *dev, int nand_chunk,
-+ const u8 *data, int data_len,
-+ const u8 *oob, int oob_len);
-+ int (*drv_read_chunk_fn) (struct yaffs_dev *dev, int nand_chunk,
-+ u8 *data, int data_len,
-+ u8 *oob, int oob_len,
-+ enum yaffs_ecc_result *ecc_result);
-+ int (*drv_erase_fn) (struct yaffs_dev *dev, int block_no);
-+ int (*drv_mark_bad_fn) (struct yaffs_dev *dev, int block_no);
-+ int (*drv_check_bad_fn) (struct yaffs_dev *dev, int block_no);
-+ int (*drv_initialise_fn) (struct yaffs_dev *dev);
-+ int (*drv_deinitialise_fn) (struct yaffs_dev *dev);
-+};
-+
-+struct yaffs_tags_handler {
-+ int (*write_chunk_tags_fn) (struct yaffs_dev *dev,
-+ int nand_chunk, const u8 *data,
-+ const struct yaffs_ext_tags *tags);
-+ int (*read_chunk_tags_fn) (struct yaffs_dev *dev,
-+ int nand_chunk, u8 *data,
-+ struct yaffs_ext_tags *tags);
-+
-+ int (*query_block_fn) (struct yaffs_dev *dev, int block_no,
-+ enum yaffs_block_state *state,
-+ u32 *seq_number);
-+ int (*mark_bad_fn) (struct yaffs_dev *dev, int block_no);
-+};
-+
-+struct yaffs_dev {
-+ struct yaffs_param param;
-+ struct yaffs_driver drv;
-+ struct yaffs_tags_handler tagger;
-+
-+ /* Context storage. Holds extra OS specific data for this device */
-+
-+ void *os_context;
-+ void *driver_context;
-+
-+ struct list_head dev_list;
-+
-+ int ll_init;
-+ /* Runtime parameters. Set up by YAFFS. */
-+ int data_bytes_per_chunk;
-+
-+ /* Non-wide tnode stuff */
-+ u16 chunk_grp_bits; /* Number of bits that need to be resolved if
-+ * the tnodes are not wide enough.
-+ */
-+ u16 chunk_grp_size; /* == 2^^chunk_grp_bits */
-+
-+ /* Stuff to support wide tnodes */
-+ u32 tnode_width;
-+ u32 tnode_mask;
-+ u32 tnode_size;
-+
-+ /* Stuff for figuring out file offset to chunk conversions */
-+ u32 chunk_shift; /* Shift value */
-+ u32 chunk_div; /* Divisor after shifting: 1 for 2^n sizes */
-+ u32 chunk_mask; /* Mask to use for power-of-2 case */
-+
-+ int is_mounted;
-+ int read_only;
-+ int is_checkpointed;
-+
-+ /* Stuff to support block offsetting to support start block zero */
-+ int internal_start_block;
-+ int internal_end_block;
-+ int block_offset;
-+ int chunk_offset;
-+
-+ /* Runtime checkpointing stuff */
-+ int checkpt_page_seq; /* running sequence number of checkpt pages */
-+ int checkpt_byte_count;
-+ int checkpt_byte_offs;
-+ u8 *checkpt_buffer;
-+ int checkpt_open_write;
-+ int blocks_in_checkpt;
-+ int checkpt_cur_chunk;
-+ int checkpt_cur_block;
-+ int checkpt_next_block;
-+ int *checkpt_block_list;
-+ int checkpt_max_blocks;
-+ u32 checkpt_sum;
-+ u32 checkpt_xor;
-+
-+ int checkpoint_blocks_required; /* Number of blocks needed to store
-+ * current checkpoint set */
-+
-+ /* Block Info */
-+ struct yaffs_block_info *block_info;
-+ u8 *chunk_bits; /* bitmap of chunks in use */
-+ u8 block_info_alt:1; /* allocated using alternative alloc */
-+ u8 chunk_bits_alt:1; /* allocated using alternative alloc */
-+ int chunk_bit_stride; /* Number of bytes of chunk_bits per block.
-+ * Must be consistent with chunks_per_block.
-+ */
-+
-+ int n_erased_blocks;
-+ int alloc_block; /* Current block being allocated off */
-+ u32 alloc_page;
-+ int alloc_block_finder; /* Used to search for next allocation block */
-+
-+ /* Object and Tnode memory management */
-+ void *allocator;
-+ int n_obj;
-+ int n_tnodes;
-+
-+ int n_hardlinks;
-+
-+ struct yaffs_obj_bucket obj_bucket[YAFFS_NOBJECT_BUCKETS];
-+ u32 bucket_finder;
-+
-+ int n_free_chunks;
-+
-+ /* Garbage collection control */
-+ u32 *gc_cleanup_list; /* objects to delete at the end of a GC. */
-+ u32 n_clean_ups;
-+
-+ unsigned has_pending_prioritised_gc; /* We think this device might
-+ have pending prioritised gcs */
-+ unsigned gc_disable;
-+ unsigned gc_block_finder;
-+ unsigned gc_dirtiest;
-+ unsigned gc_pages_in_use;
-+ unsigned gc_not_done;
-+ unsigned gc_block;
-+ unsigned gc_chunk;
-+ unsigned gc_skip;
-+ struct yaffs_summary_tags *gc_sum_tags;
-+
-+ /* Special directories */
-+ struct yaffs_obj *root_dir;
-+ struct yaffs_obj *lost_n_found;
-+
-+ int buffered_block; /* Which block is buffered here? */
-+ int doing_buffered_block_rewrite;
-+
-+ struct yaffs_cache *cache;
-+ int cache_last_use;
-+
-+ /* Stuff for background deletion and unlinked files. */
-+ struct yaffs_obj *unlinked_dir; /* Directory where unlinked and deleted
-+ files live. */
-+ struct yaffs_obj *del_dir; /* Directory where deleted objects are
-+ sent to disappear. */
-+ struct yaffs_obj *unlinked_deletion; /* Current file being
-+ background deleted. */
-+ int n_deleted_files; /* Count of files awaiting deletion; */
-+ int n_unlinked_files; /* Count of unlinked files. */
-+ int n_bg_deletions; /* Count of background deletions. */
-+
-+ /* Temporary buffer management */
-+ struct yaffs_buffer temp_buffer[YAFFS_N_TEMP_BUFFERS];
-+ int max_temp;
-+ int temp_in_use;
-+ int unmanaged_buffer_allocs;
-+ int unmanaged_buffer_deallocs;
-+
-+ /* yaffs2 runtime stuff */
-+ unsigned seq_number; /* Sequence number of currently
-+ allocating block */
-+ unsigned oldest_dirty_seq;
-+ unsigned oldest_dirty_block;
-+
-+ /* Block refreshing */
-+ int refresh_skip; /* A skip down counter.
-+ * Refresh happens when this gets to zero. */
-+
-+ /* Dirty directory handling */
-+ struct list_head dirty_dirs; /* List of dirty directories */
-+
-+ /* Summary */
-+ int chunks_per_summary;
-+ struct yaffs_summary_tags *sum_tags;
-+
-+ /* Statistics */
-+ u32 n_page_writes;
-+ u32 n_page_reads;
-+ u32 n_erasures;
-+ u32 n_bad_queries;
-+ u32 n_bad_markings;
-+ u32 n_erase_failures;
-+ u32 n_gc_copies;
-+ u32 all_gcs;
-+ u32 passive_gc_count;
-+ u32 oldest_dirty_gc_count;
-+ u32 n_gc_blocks;
-+ u32 bg_gcs;
-+ u32 n_retried_writes;
-+ u32 n_retired_blocks;
-+ u32 n_ecc_fixed;
-+ u32 n_ecc_unfixed;
-+ u32 n_tags_ecc_fixed;
-+ u32 n_tags_ecc_unfixed;
-+ u32 n_deletions;
-+ u32 n_unmarked_deletions;
-+ u32 refresh_count;
-+ u32 cache_hits;
-+ u32 tags_used;
-+ u32 summary_used;
-+
-+};
-+
-+/* The CheckpointDevice structure holds the device information that changes
-+ *at runtime and must be preserved over unmount/mount cycles.
-+ */
-+struct yaffs_checkpt_dev {
-+ int struct_type;
-+ int n_erased_blocks;
-+ int alloc_block; /* Current block being allocated off */
-+ u32 alloc_page;
-+ int n_free_chunks;
-+
-+ int n_deleted_files; /* Count of files awaiting deletion; */
-+ int n_unlinked_files; /* Count of unlinked files. */
-+ int n_bg_deletions; /* Count of background deletions. */
-+
-+ /* yaffs2 runtime stuff */
-+ unsigned seq_number; /* Sequence number of currently
-+ * allocating block */
-+
-+};
-+
-+struct yaffs_checkpt_validity {
-+ int struct_type;
-+ u32 magic;
-+ u32 version;
-+ u32 head;
-+};
-+
-+struct yaffs_shadow_fixer {
-+ int obj_id;
-+ int shadowed_id;
-+ struct yaffs_shadow_fixer *next;
-+};
-+
-+/* Structure for doing xattr modifications */
-+struct yaffs_xattr_mod {
-+ int set; /* If 0 then this is a deletion */
-+ const YCHAR *name;
-+ const void *data;
-+ int size;
-+ int flags;
-+ int result;
-+};
-+
-+/*----------------------- YAFFS Functions -----------------------*/
-+
-+int yaffs_guts_initialise(struct yaffs_dev *dev);
-+void yaffs_deinitialise(struct yaffs_dev *dev);
-+
-+int yaffs_get_n_free_chunks(struct yaffs_dev *dev);
-+
-+int yaffs_rename_obj(struct yaffs_obj *old_dir, const YCHAR * old_name,
-+ struct yaffs_obj *new_dir, const YCHAR * new_name);
-+
-+int yaffs_unlinker(struct yaffs_obj *dir, const YCHAR * name);
-+int yaffs_del_obj(struct yaffs_obj *obj);
-+struct yaffs_obj *yaffs_retype_obj(struct yaffs_obj *obj,
-+ enum yaffs_obj_type type);
-+
-+
-+int yaffs_get_obj_name(struct yaffs_obj *obj, YCHAR * name, int buffer_size);
-+loff_t yaffs_get_obj_length(struct yaffs_obj *obj);
-+int yaffs_get_obj_inode(struct yaffs_obj *obj);
-+unsigned yaffs_get_obj_type(struct yaffs_obj *obj);
-+int yaffs_get_obj_link_count(struct yaffs_obj *obj);
-+
-+/* File operations */
-+int yaffs_file_rd(struct yaffs_obj *obj, u8 * buffer, loff_t offset,
-+ int n_bytes);
-+int yaffs_wr_file(struct yaffs_obj *obj, const u8 * buffer, loff_t offset,
-+ int n_bytes, int write_trhrough);
-+int yaffs_resize_file(struct yaffs_obj *obj, loff_t new_size);
-+
-+struct yaffs_obj *yaffs_create_file(struct yaffs_obj *parent,
-+ const YCHAR *name, u32 mode, u32 uid,
-+ u32 gid);
-+
-+int yaffs_flush_file(struct yaffs_obj *obj, int update_time, int data_sync);
-+
-+/* Flushing and checkpointing */
-+void yaffs_flush_whole_cache(struct yaffs_dev *dev);
-+
-+int yaffs_checkpoint_save(struct yaffs_dev *dev);
-+int yaffs_checkpoint_restore(struct yaffs_dev *dev);
-+
-+/* Directory operations */
-+struct yaffs_obj *yaffs_create_dir(struct yaffs_obj *parent, const YCHAR *name,
-+ u32 mode, u32 uid, u32 gid);
-+struct yaffs_obj *yaffs_find_by_name(struct yaffs_obj *the_dir,
-+ const YCHAR *name);
-+struct yaffs_obj *yaffs_find_by_number(struct yaffs_dev *dev, u32 number);
-+
-+/* Link operations */
-+struct yaffs_obj *yaffs_link_obj(struct yaffs_obj *parent, const YCHAR *name,
-+ struct yaffs_obj *equiv_obj);
-+
-+struct yaffs_obj *yaffs_get_equivalent_obj(struct yaffs_obj *obj);
-+
-+/* Symlink operations */
-+struct yaffs_obj *yaffs_create_symlink(struct yaffs_obj *parent,
-+ const YCHAR *name, u32 mode, u32 uid,
-+ u32 gid, const YCHAR *alias);
-+YCHAR *yaffs_get_symlink_alias(struct yaffs_obj *obj);
-+
-+/* Special inodes (fifos, sockets and devices) */
-+struct yaffs_obj *yaffs_create_special(struct yaffs_obj *parent,
-+ const YCHAR *name, u32 mode, u32 uid,
-+ u32 gid, u32 rdev);
-+
-+int yaffs_set_xattrib(struct yaffs_obj *obj, const YCHAR *name,
-+ const void *value, int size, int flags);
-+int yaffs_get_xattrib(struct yaffs_obj *obj, const YCHAR *name, void *value,
-+ int size);
-+int yaffs_list_xattrib(struct yaffs_obj *obj, char *buffer, int size);
-+int yaffs_remove_xattrib(struct yaffs_obj *obj, const YCHAR *name);
-+
-+/* Special directories */
-+struct yaffs_obj *yaffs_root(struct yaffs_dev *dev);
-+struct yaffs_obj *yaffs_lost_n_found(struct yaffs_dev *dev);
-+
-+void yaffs_handle_defered_free(struct yaffs_obj *obj);
-+
-+void yaffs_update_dirty_dirs(struct yaffs_dev *dev);
-+
-+int yaffs_bg_gc(struct yaffs_dev *dev, unsigned urgency);
-+
-+/* Debug dump */
-+int yaffs_dump_obj(struct yaffs_obj *obj);
-+
-+void yaffs_guts_test(struct yaffs_dev *dev);
-+int yaffs_guts_ll_init(struct yaffs_dev *dev);
-+
-+
-+/* A few useful functions to be used within the core files*/
-+void yaffs_chunk_del(struct yaffs_dev *dev, int chunk_id, int mark_flash,
-+ int lyn);
-+int yaffs_check_ff(u8 *buffer, int n_bytes);
-+void yaffs_handle_chunk_error(struct yaffs_dev *dev,
-+ struct yaffs_block_info *bi);
-+
-+u8 *yaffs_get_temp_buffer(struct yaffs_dev *dev);
-+void yaffs_release_temp_buffer(struct yaffs_dev *dev, u8 *buffer);
-+
-+struct yaffs_obj *yaffs_find_or_create_by_number(struct yaffs_dev *dev,
-+ int number,
-+ enum yaffs_obj_type type);
-+int yaffs_put_chunk_in_file(struct yaffs_obj *in, int inode_chunk,
-+ int nand_chunk, int in_scan);
-+void yaffs_set_obj_name(struct yaffs_obj *obj, const YCHAR *name);
-+void yaffs_set_obj_name_from_oh(struct yaffs_obj *obj,
-+ const struct yaffs_obj_hdr *oh);
-+void yaffs_add_obj_to_dir(struct yaffs_obj *directory, struct yaffs_obj *obj);
-+YCHAR *yaffs_clone_str(const YCHAR *str);
-+void yaffs_link_fixup(struct yaffs_dev *dev, struct list_head *hard_list);
-+void yaffs_block_became_dirty(struct yaffs_dev *dev, int block_no);
-+int yaffs_update_oh(struct yaffs_obj *in, const YCHAR *name,
-+ int force, int is_shrink, int shadows,
-+ struct yaffs_xattr_mod *xop);
-+void yaffs_handle_shadowed_obj(struct yaffs_dev *dev, int obj_id,
-+ int backward_scanning);
-+int yaffs_check_alloc_available(struct yaffs_dev *dev, int n_chunks);
-+struct yaffs_tnode *yaffs_get_tnode(struct yaffs_dev *dev);
-+struct yaffs_tnode *yaffs_add_find_tnode_0(struct yaffs_dev *dev,
-+ struct yaffs_file_var *file_struct,
-+ u32 chunk_id,
-+ struct yaffs_tnode *passed_tn);
-+
-+int yaffs_do_file_wr(struct yaffs_obj *in, const u8 *buffer, loff_t offset,
-+ int n_bytes, int write_trhrough);
-+void yaffs_resize_file_down(struct yaffs_obj *obj, loff_t new_size);
-+void yaffs_skip_rest_of_block(struct yaffs_dev *dev);
-+
-+int yaffs_count_free_chunks(struct yaffs_dev *dev);
-+
-+struct yaffs_tnode *yaffs_find_tnode_0(struct yaffs_dev *dev,
-+ struct yaffs_file_var *file_struct,
-+ u32 chunk_id);
-+
-+u32 yaffs_get_group_base(struct yaffs_dev *dev, struct yaffs_tnode *tn,
-+ unsigned pos);
-+
-+int yaffs_is_non_empty_dir(struct yaffs_obj *obj);
-+
-+int yaffs_guts_format_dev(struct yaffs_dev *dev);
-+
-+void yaffs_addr_to_chunk(struct yaffs_dev *dev, loff_t addr,
-+ int *chunk_out, u32 *offset_out);
-+/*
-+ * Marshalling functions to get loff_t file sizes into aand out of
-+ * object headers.
-+ */
-+void yaffs_oh_size_load(struct yaffs_obj_hdr *oh, loff_t fsize);
-+loff_t yaffs_oh_to_size(struct yaffs_obj_hdr *oh);
-+loff_t yaffs_max_file_size(struct yaffs_dev *dev);
-+
-+/*
-+ * Debug function to count number of blocks in each state
-+ * NB Needs to be called with correct number of integers
-+ */
-+
-+void yaffs_count_blocks_by_state(struct yaffs_dev *dev, int bs[10]);
-+
-+int yaffs_find_chunk_in_file(struct yaffs_obj *in, int inode_chunk,
-+ struct yaffs_ext_tags *tags);
-+
-+#endif
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_linux.h linux-3.12.20/fs/yaffs2/yaffs_linux.h
---- linux-3.12.20.orig/fs/yaffs2/yaffs_linux.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_linux.h 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,48 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_LINUX_H__
-+#define __YAFFS_LINUX_H__
-+
-+#include "yportenv.h"
-+
-+struct yaffs_linux_context {
-+ struct list_head context_list; /* List of these we have mounted */
-+ struct yaffs_dev *dev;
-+ struct super_block *super;
-+ struct task_struct *bg_thread; /* Background thread for this device */
-+ int bg_running;
-+ struct mutex gross_lock; /* Gross locking mutex*/
-+ u8 *spare_buffer; /* For mtdif2 use. Don't know the buffer size
-+ * at compile time so we have to allocate it.
-+ */
-+ struct list_head search_contexts;
-+ struct task_struct *readdir_process;
-+ unsigned mount_id;
-+ int dirty;
-+};
-+
-+#define yaffs_dev_to_lc(dev) ((struct yaffs_linux_context *)((dev)->os_context))
-+#define yaffs_dev_to_mtd(dev) ((struct mtd_info *)((dev)->driver_context))
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-+#define WRITE_SIZE_STR "writesize"
-+#define WRITE_SIZE(mtd) ((mtd)->writesize)
-+#else
-+#define WRITE_SIZE_STR "oobblock"
-+#define WRITE_SIZE(mtd) ((mtd)->oobblock)
-+#endif
-+
-+#endif
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_mtdif.c linux-3.12.20/fs/yaffs2/yaffs_mtdif.c
---- linux-3.12.20.orig/fs/yaffs2/yaffs_mtdif.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_mtdif.c 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,309 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yportenv.h"
-+
-+#include "yaffs_mtdif.h"
-+
-+#include "linux/mtd/mtd.h"
-+#include "linux/types.h"
-+#include "linux/time.h"
-+#include "linux/major.h"
-+#include "linux/mtd/nand.h"
-+#include "linux/kernel.h"
-+#include "linux/version.h"
-+#include "linux/types.h"
-+
-+#include "yaffs_trace.h"
-+#include "yaffs_guts.h"
-+#include "yaffs_linux.h"
-+
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 2, 0))
-+#define MTD_OPS_AUTO_OOB MTD_OOB_AUTO
-+#endif
-+
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 4, 0))
-+#define mtd_erase(m, ei) (m)->erase(m, ei)
-+#define mtd_write_oob(m, addr, pops) (m)->write_oob(m, addr, pops)
-+#define mtd_read_oob(m, addr, pops) (m)->read_oob(m, addr, pops)
-+#define mtd_block_isbad(m, offs) (m)->block_isbad(m, offs)
-+#define mtd_block_markbad(m, offs) (m)->block_markbad(m, offs)
-+#endif
-+
-+
-+
-+int nandmtd_erase_block(struct yaffs_dev *dev, int block_no)
-+{
-+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
-+ u32 addr =
-+ ((loff_t) block_no) * dev->param.total_bytes_per_chunk *
-+ dev->param.chunks_per_block;
-+ struct erase_info ei;
-+ int retval = 0;
-+
-+ ei.mtd = mtd;
-+ ei.addr = addr;
-+ ei.len = dev->param.total_bytes_per_chunk * dev->param.chunks_per_block;
-+ ei.time = 1000;
-+ ei.retries = 2;
-+ ei.callback = NULL;
-+ ei.priv = (u_long) dev;
-+
-+ retval = mtd_erase(mtd, &ei);
-+
-+ if (retval == 0)
-+ return YAFFS_OK;
-+
-+ return YAFFS_FAIL;
-+}
-+
-+
-+static int yaffs_mtd_write(struct yaffs_dev *dev, int nand_chunk,
-+ const u8 *data, int data_len,
-+ const u8 *oob, int oob_len)
-+{
-+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
-+ loff_t addr;
-+ struct mtd_oob_ops ops;
-+ int retval;
-+
-+ yaffs_trace(YAFFS_TRACE_MTD,
-+ "yaffs_mtd_write(%p, %d, %p, %d, %p, %d)\n",
-+ dev, nand_chunk, data, data_len, oob, oob_len);
-+
-+ if (!data || !data_len) {
-+ data = NULL;
-+ data_len = 0;
-+ }
-+
-+ if (!oob || !oob_len) {
-+ oob = NULL;
-+ oob_len = 0;
-+ }
-+
-+ addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk;
-+ memset(&ops, 0, sizeof(ops));
-+ ops.mode = MTD_OPS_AUTO_OOB;
-+ ops.len = (data) ? data_len : 0;
-+ ops.ooblen = oob_len;
-+ ops.datbuf = (u8 *)data;
-+ ops.oobbuf = (u8 *)oob;
-+
-+ retval = mtd_write_oob(mtd, addr, &ops);
-+ if (retval) {
-+ yaffs_trace(YAFFS_TRACE_MTD,
-+ "write_oob failed, chunk %d, mtd error %d",
-+ nand_chunk, retval);
-+ }
-+ return retval ? YAFFS_FAIL : YAFFS_OK;
-+}
-+
-+static int yaffs_mtd_read(struct yaffs_dev *dev, int nand_chunk,
-+ u8 *data, int data_len,
-+ u8 *oob, int oob_len,
-+ enum yaffs_ecc_result *ecc_result)
-+{
-+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
-+ loff_t addr;
-+ struct mtd_oob_ops ops;
-+ int retval;
-+
-+ addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk;
-+ memset(&ops, 0, sizeof(ops));
-+ ops.mode = MTD_OPS_AUTO_OOB;
-+ ops.len = (data) ? data_len : 0;
-+ ops.ooblen = oob_len;
-+ ops.datbuf = data;
-+ ops.oobbuf = oob;
-+
-+#if (MTD_VERSION_CODE < MTD_VERSION(2, 6, 20))
-+ /* In MTD 2.6.18 to 2.6.19 nand_base.c:nand_do_read_oob() has a bug;
-+ * help it out with ops.len = ops.ooblen when ops.datbuf == NULL.
-+ */
-+ ops.len = (ops.datbuf) ? ops.len : ops.ooblen;
-+#endif
-+ /* Read page and oob using MTD.
-+ * Check status and determine ECC result.
-+ */
-+ retval = mtd_read_oob(mtd, addr, &ops);
-+ if (retval)
-+ yaffs_trace(YAFFS_TRACE_MTD,
-+ "read_oob failed, chunk %d, mtd error %d",
-+ nand_chunk, retval);
-+
-+ switch (retval) {
-+ case 0:
-+ /* no error */
-+ if(ecc_result)
-+ *ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
-+ break;
-+
-+ case -EUCLEAN:
-+ /* MTD's ECC fixed the data */
-+ if(ecc_result)
-+ *ecc_result = YAFFS_ECC_RESULT_FIXED;
-+ dev->n_ecc_fixed++;
-+ break;
-+
-+ case -EBADMSG:
-+ default:
-+ /* MTD's ECC could not fix the data */
-+ dev->n_ecc_unfixed++;
-+ if(ecc_result)
-+ *ecc_result = YAFFS_ECC_RESULT_UNFIXED;
-+ return YAFFS_FAIL;
-+ }
-+
-+ return YAFFS_OK;
-+}
-+
-+static int yaffs_mtd_erase(struct yaffs_dev *dev, int block_no)
-+{
-+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
-+
-+ loff_t addr;
-+ struct erase_info ei;
-+ int retval = 0;
-+ u32 block_size;
-+
-+ block_size = dev->param.total_bytes_per_chunk *
-+ dev->param.chunks_per_block;
-+ addr = ((loff_t) block_no) * block_size;
-+
-+ ei.mtd = mtd;
-+ ei.addr = addr;
-+ ei.len = block_size;
-+ ei.time = 1000;
-+ ei.retries = 2;
-+ ei.callback = NULL;
-+ ei.priv = (u_long) dev;
-+
-+ retval = mtd_erase(mtd, &ei);
-+
-+ if (retval == 0)
-+ return YAFFS_OK;
-+
-+ return YAFFS_FAIL;
-+}
-+
-+static int yaffs_mtd_mark_bad(struct yaffs_dev *dev, int block_no)
-+{
-+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
-+ int blocksize = dev->param.chunks_per_block * dev->param.total_bytes_per_chunk;
-+ int retval;
-+
-+ yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, "marking block %d bad", block_no);
-+
-+ retval = mtd_block_markbad(mtd, (loff_t) blocksize * block_no);
-+ return (retval) ? YAFFS_FAIL : YAFFS_OK;
-+}
-+
-+static int yaffs_mtd_check_bad(struct yaffs_dev *dev, int block_no)
-+{
-+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
-+ int blocksize = dev->param.chunks_per_block * dev->param.total_bytes_per_chunk;
-+ int retval;
-+
-+ yaffs_trace(YAFFS_TRACE_MTD, "checking block %d bad", block_no);
-+
-+ retval = mtd_block_isbad(mtd, (loff_t) blocksize * block_no);
-+ return (retval) ? YAFFS_FAIL : YAFFS_OK;
-+}
-+
-+static int yaffs_mtd_initialise(struct yaffs_dev *dev)
-+{
-+ return YAFFS_OK;
-+}
-+
-+static int yaffs_mtd_deinitialise(struct yaffs_dev *dev)
-+{
-+ return YAFFS_OK;
-+}
-+
-+
-+void yaffs_mtd_drv_install(struct yaffs_dev *dev)
-+{
-+ struct yaffs_driver *drv = &dev->drv;
-+
-+ drv->drv_write_chunk_fn = yaffs_mtd_write;
-+ drv->drv_read_chunk_fn = yaffs_mtd_read;
-+ drv->drv_erase_fn = yaffs_mtd_erase;
-+ drv->drv_mark_bad_fn = yaffs_mtd_mark_bad;
-+ drv->drv_check_bad_fn = yaffs_mtd_check_bad;
-+ drv->drv_initialise_fn = yaffs_mtd_initialise;
-+ drv->drv_deinitialise_fn = yaffs_mtd_deinitialise;
-+}
-+
-+
-+struct mtd_info * yaffs_get_mtd_device(dev_t sdev)
-+{
-+ struct mtd_info *mtd;
-+
-+ mtd = yaffs_get_mtd_device(sdev);
-+
-+ /* Check it's an mtd device..... */
-+ if (MAJOR(sdev) != MTD_BLOCK_MAJOR)
-+ return NULL; /* This isn't an mtd device */
-+
-+ /* Check it's NAND */
-+ if (mtd->type != MTD_NANDFLASH) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs: MTD device is not NAND it's type %d",
-+ mtd->type);
-+ return NULL;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_OS, " %s %d", WRITE_SIZE_STR, WRITE_SIZE(mtd));
-+ yaffs_trace(YAFFS_TRACE_OS, " oobsize %d", mtd->oobsize);
-+ yaffs_trace(YAFFS_TRACE_OS, " erasesize %d", mtd->erasesize);
-+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
-+ yaffs_trace(YAFFS_TRACE_OS, " size %u", mtd->size);
-+#else
-+ yaffs_trace(YAFFS_TRACE_OS, " size %lld", mtd->size);
-+#endif
-+
-+ return mtd;
-+}
-+
-+int yaffs_verify_mtd(struct mtd_info *mtd, int yaffs_version, int inband_tags)
-+{
-+ if (yaffs_version == 2) {
-+ if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
-+ mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) &&
-+ !inband_tags) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "MTD device does not have the right page sizes"
-+ );
-+ return -1;
-+ }
-+ } else {
-+ if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK ||
-+ mtd->oobsize != YAFFS_BYTES_PER_SPARE) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "MTD device does not support have the right page sizes"
-+ );
-+ return -1;
-+ }
-+ }
-+
-+ return 0;
-+}
-+
-+
-+void yaffs_put_mtd_device(struct mtd_info *mtd)
-+{
-+ if(mtd)
-+ put_mtd_device(mtd);
-+}
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_mtdif.h linux-3.12.20/fs/yaffs2/yaffs_mtdif.h
---- linux-3.12.20.orig/fs/yaffs2/yaffs_mtdif.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_mtdif.h 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,25 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_MTDIF_H__
-+#define __YAFFS_MTDIF_H__
-+
-+#include "yaffs_guts.h"
-+
-+void yaffs_mtd_drv_install(struct yaffs_dev *dev);
-+struct mtd_info * yaffs_get_mtd_device(dev_t sdev);
-+void yaffs_put_mtd_device(struct mtd_info *mtd);
-+int yaffs_verify_mtd(struct mtd_info *mtd, int yaffs_version, int inband_tags);
-+#endif
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_nameval.c linux-3.12.20/fs/yaffs2/yaffs_nameval.c
---- linux-3.12.20.orig/fs/yaffs2/yaffs_nameval.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_nameval.c 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,208 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+/*
-+ * This simple implementation of a name-value store assumes a small number of
-+* values and fits into a small finite buffer.
-+ *
-+ * Each attribute is stored as a record:
-+ * sizeof(int) bytes record size.
-+ * strnlen+1 bytes name null terminated.
-+ * nbytes value.
-+ * ----------
-+ * total size stored in record size
-+ *
-+ * This code has not been tested with unicode yet.
-+ */
-+
-+#include "yaffs_nameval.h"
-+
-+#include "yportenv.h"
-+
-+static int nval_find(const char *xb, int xb_size, const YCHAR *name,
-+ int *exist_size)
-+{
-+ int pos = 0;
-+ int size;
-+
-+ memcpy(&size, xb, sizeof(int));
-+ while (size > 0 && (size < xb_size) && (pos + size < xb_size)) {
-+ if (!strncmp((YCHAR *) (xb + pos + sizeof(int)),
-+ name, size)) {
-+ if (exist_size)
-+ *exist_size = size;
-+ return pos;
-+ }
-+ pos += size;
-+ if (pos < xb_size - sizeof(int))
-+ memcpy(&size, xb + pos, sizeof(int));
-+ else
-+ size = 0;
-+ }
-+ if (exist_size)
-+ *exist_size = 0;
-+ return -ENODATA;
-+}
-+
-+static int nval_used(const char *xb, int xb_size)
-+{
-+ int pos = 0;
-+ int size;
-+
-+ memcpy(&size, xb + pos, sizeof(int));
-+ while (size > 0 && (size < xb_size) && (pos + size < xb_size)) {
-+ pos += size;
-+ if (pos < xb_size - sizeof(int))
-+ memcpy(&size, xb + pos, sizeof(int));
-+ else
-+ size = 0;
-+ }
-+ return pos;
-+}
-+
-+int nval_del(char *xb, int xb_size, const YCHAR *name)
-+{
-+ int pos = nval_find(xb, xb_size, name, NULL);
-+ int size;
-+
-+ if (pos < 0 || pos >= xb_size)
-+ return -ENODATA;
-+
-+ /* Find size, shift rest over this record,
-+ * then zero out the rest of buffer */
-+ memcpy(&size, xb + pos, sizeof(int));
-+ memcpy(xb + pos, xb + pos + size, xb_size - (pos + size));
-+ memset(xb + (xb_size - size), 0, size);
-+ return 0;
-+}
-+
-+int nval_set(char *xb, int xb_size, const YCHAR *name, const char *buf,
-+ int bsize, int flags)
-+{
-+ int pos;
-+ int namelen = strnlen(name, xb_size);
-+ int reclen;
-+ int size_exist = 0;
-+ int space;
-+ int start;
-+
-+ pos = nval_find(xb, xb_size, name, &size_exist);
-+
-+ if (flags & XATTR_CREATE && pos >= 0)
-+ return -EEXIST;
-+ if (flags & XATTR_REPLACE && pos < 0)
-+ return -ENODATA;
-+
-+ start = nval_used(xb, xb_size);
-+ space = xb_size - start + size_exist;
-+
-+ reclen = (sizeof(int) + namelen + 1 + bsize);
-+
-+ if (reclen > space)
-+ return -ENOSPC;
-+
-+ if (pos >= 0) {
-+ nval_del(xb, xb_size, name);
-+ start = nval_used(xb, xb_size);
-+ }
-+
-+ pos = start;
-+
-+ memcpy(xb + pos, &reclen, sizeof(int));
-+ pos += sizeof(int);
-+ strncpy((YCHAR *) (xb + pos), name, reclen);
-+ pos += (namelen + 1);
-+ memcpy(xb + pos, buf, bsize);
-+ return 0;
-+}
-+
-+int nval_get(const char *xb, int xb_size, const YCHAR * name, char *buf,
-+ int bsize)
-+{
-+ int pos = nval_find(xb, xb_size, name, NULL);
-+ int size;
-+
-+ if (pos >= 0 && pos < xb_size) {
-+
-+ memcpy(&size, xb + pos, sizeof(int));
-+ pos += sizeof(int); /* advance past record length */
-+ size -= sizeof(int);
-+
-+ /* Advance over name string */
-+ while (xb[pos] && size > 0 && pos < xb_size) {
-+ pos++;
-+ size--;
-+ }
-+ /*Advance over NUL */
-+ pos++;
-+ size--;
-+
-+ /* If bsize is zero then this is a size query.
-+ * Return the size, but don't copy.
-+ */
-+ if (!bsize)
-+ return size;
-+
-+ if (size <= bsize) {
-+ memcpy(buf, xb + pos, size);
-+ return size;
-+ }
-+ }
-+ if (pos >= 0)
-+ return -ERANGE;
-+
-+ return -ENODATA;
-+}
-+
-+int nval_list(const char *xb, int xb_size, char *buf, int bsize)
-+{
-+ int pos = 0;
-+ int size;
-+ int name_len;
-+ int ncopied = 0;
-+ int filled = 0;
-+
-+ memcpy(&size, xb + pos, sizeof(int));
-+ while (size > sizeof(int) &&
-+ size <= xb_size &&
-+ (pos + size) < xb_size &&
-+ !filled) {
-+ pos += sizeof(int);
-+ size -= sizeof(int);
-+ name_len = strnlen((YCHAR *) (xb + pos), size);
-+ if (ncopied + name_len + 1 < bsize) {
-+ memcpy(buf, xb + pos, name_len * sizeof(YCHAR));
-+ buf += name_len;
-+ *buf = '\0';
-+ buf++;
-+ if (sizeof(YCHAR) > 1) {
-+ *buf = '\0';
-+ buf++;
-+ }
-+ ncopied += (name_len + 1);
-+ } else {
-+ filled = 1;
-+ }
-+ pos += size;
-+ if (pos < xb_size - sizeof(int))
-+ memcpy(&size, xb + pos, sizeof(int));
-+ else
-+ size = 0;
-+ }
-+ return ncopied;
-+}
-+
-+int nval_hasvalues(const char *xb, int xb_size)
-+{
-+ return nval_used(xb, xb_size) > 0;
-+}
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_nameval.h linux-3.12.20/fs/yaffs2/yaffs_nameval.h
---- linux-3.12.20.orig/fs/yaffs2/yaffs_nameval.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_nameval.h 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,28 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __NAMEVAL_H__
-+#define __NAMEVAL_H__
-+
-+#include "yportenv.h"
-+
-+int nval_del(char *xb, int xb_size, const YCHAR * name);
-+int nval_set(char *xb, int xb_size, const YCHAR * name, const char *buf,
-+ int bsize, int flags);
-+int nval_get(const char *xb, int xb_size, const YCHAR * name, char *buf,
-+ int bsize);
-+int nval_list(const char *xb, int xb_size, char *buf, int bsize);
-+int nval_hasvalues(const char *xb, int xb_size);
-+#endif
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_nand.c linux-3.12.20/fs/yaffs2/yaffs_nand.c
---- linux-3.12.20.orig/fs/yaffs2/yaffs_nand.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_nand.c 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,122 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_nand.h"
-+#include "yaffs_tagscompat.h"
-+
-+#include "yaffs_getblockinfo.h"
-+#include "yaffs_summary.h"
-+
-+static int apply_chunk_offset(struct yaffs_dev *dev, int chunk)
-+{
-+ return chunk - dev->chunk_offset;
-+}
-+
-+int yaffs_rd_chunk_tags_nand(struct yaffs_dev *dev, int nand_chunk,
-+ u8 *buffer, struct yaffs_ext_tags *tags)
-+{
-+ int result;
-+ struct yaffs_ext_tags local_tags;
-+ int flash_chunk = apply_chunk_offset(dev, nand_chunk);
-+
-+ dev->n_page_reads++;
-+
-+ /* If there are no tags provided use local tags. */
-+ if (!tags)
-+ tags = &local_tags;
-+
-+ result = dev->tagger.read_chunk_tags_fn(dev, flash_chunk, buffer, tags);
-+ if (tags && tags->ecc_result > YAFFS_ECC_RESULT_NO_ERROR) {
-+
-+ struct yaffs_block_info *bi;
-+ bi = yaffs_get_block_info(dev,
-+ nand_chunk /
-+ dev->param.chunks_per_block);
-+ yaffs_handle_chunk_error(dev, bi);
-+ }
-+ return result;
-+}
-+
-+int yaffs_wr_chunk_tags_nand(struct yaffs_dev *dev,
-+ int nand_chunk,
-+ const u8 *buffer, struct yaffs_ext_tags *tags)
-+{
-+ int result;
-+ int flash_chunk = apply_chunk_offset(dev, nand_chunk);
-+
-+ dev->n_page_writes++;
-+
-+ if (!tags) {
-+ yaffs_trace(YAFFS_TRACE_ERROR, "Writing with no tags");
-+ BUG();
-+ return YAFFS_FAIL;
-+ }
-+
-+ tags->seq_number = dev->seq_number;
-+ tags->chunk_used = 1;
-+ yaffs_trace(YAFFS_TRACE_WRITE,
-+ "Writing chunk %d tags %d %d",
-+ nand_chunk, tags->obj_id, tags->chunk_id);
-+
-+ result = dev->tagger.write_chunk_tags_fn(dev, flash_chunk,
-+ buffer, tags);
-+
-+ yaffs_summary_add(dev, tags, nand_chunk);
-+
-+ return result;
-+}
-+
-+int yaffs_mark_bad(struct yaffs_dev *dev, int block_no)
-+{
-+ block_no -= dev->block_offset;
-+ dev->n_bad_markings++;
-+
-+ if (dev->param.disable_bad_block_marking)
-+ return YAFFS_OK;
-+
-+ return dev->tagger.mark_bad_fn(dev, block_no);
-+}
-+
-+
-+int yaffs_query_init_block_state(struct yaffs_dev *dev,
-+ int block_no,
-+ enum yaffs_block_state *state,
-+ u32 *seq_number)
-+{
-+ block_no -= dev->block_offset;
-+ return dev->tagger.query_block_fn(dev, block_no, state, seq_number);
-+}
-+
-+int yaffs_erase_block(struct yaffs_dev *dev, int block_no)
-+{
-+ int result;
-+
-+ block_no -= dev->block_offset;
-+ dev->n_erasures++;
-+ result = dev->drv.drv_erase_fn(dev, block_no);
-+ return result;
-+}
-+
-+int yaffs_init_nand(struct yaffs_dev *dev)
-+{
-+ if (dev->drv.drv_initialise_fn)
-+ return dev->drv.drv_initialise_fn(dev);
-+ return YAFFS_OK;
-+}
-+
-+int yaffs_deinit_nand(struct yaffs_dev *dev)
-+{
-+ if (dev->drv.drv_deinitialise_fn)
-+ return dev->drv.drv_deinitialise_fn(dev);
-+ return YAFFS_OK;
-+}
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_nand.h linux-3.12.20/fs/yaffs2/yaffs_nand.h
---- linux-3.12.20.orig/fs/yaffs2/yaffs_nand.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_nand.h 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,39 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_NAND_H__
-+#define __YAFFS_NAND_H__
-+#include "yaffs_guts.h"
-+
-+int yaffs_rd_chunk_tags_nand(struct yaffs_dev *dev, int nand_chunk,
-+ u8 *buffer, struct yaffs_ext_tags *tags);
-+
-+int yaffs_wr_chunk_tags_nand(struct yaffs_dev *dev,
-+ int nand_chunk,
-+ const u8 *buffer, struct yaffs_ext_tags *tags);
-+
-+int yaffs_mark_bad(struct yaffs_dev *dev, int block_no);
-+
-+int yaffs_query_init_block_state(struct yaffs_dev *dev,
-+ int block_no,
-+ enum yaffs_block_state *state,
-+ unsigned *seq_number);
-+
-+int yaffs_erase_block(struct yaffs_dev *dev, int flash_block);
-+
-+int yaffs_init_nand(struct yaffs_dev *dev);
-+int yaffs_deinit_nand(struct yaffs_dev *dev);
-+
-+#endif
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_packedtags1.c linux-3.12.20/fs/yaffs2/yaffs_packedtags1.c
---- linux-3.12.20.orig/fs/yaffs2/yaffs_packedtags1.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_packedtags1.c 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,56 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_packedtags1.h"
-+#include "yportenv.h"
-+
-+static const u8 all_ff[20] = {
-+ 0xff, 0xff, 0xff, 0xff,
-+ 0xff, 0xff, 0xff, 0xff,
-+ 0xff, 0xff, 0xff, 0xff,
-+ 0xff, 0xff, 0xff, 0xff,
-+ 0xff, 0xff, 0xff, 0xff
-+};
-+
-+void yaffs_pack_tags1(struct yaffs_packed_tags1 *pt,
-+ const struct yaffs_ext_tags *t)
-+{
-+ pt->chunk_id = t->chunk_id;
-+ pt->serial_number = t->serial_number;
-+ pt->n_bytes = t->n_bytes;
-+ pt->obj_id = t->obj_id;
-+ pt->ecc = 0;
-+ pt->deleted = (t->is_deleted) ? 0 : 1;
-+ pt->unused_stuff = 0;
-+ pt->should_be_ff = 0xffffffff;
-+}
-+
-+void yaffs_unpack_tags1(struct yaffs_ext_tags *t,
-+ const struct yaffs_packed_tags1 *pt)
-+{
-+
-+ if (memcmp(all_ff, pt, sizeof(struct yaffs_packed_tags1))) {
-+ t->block_bad = 0;
-+ if (pt->should_be_ff != 0xffffffff)
-+ t->block_bad = 1;
-+ t->chunk_used = 1;
-+ t->obj_id = pt->obj_id;
-+ t->chunk_id = pt->chunk_id;
-+ t->n_bytes = pt->n_bytes;
-+ t->ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
-+ t->is_deleted = (pt->deleted) ? 0 : 1;
-+ t->serial_number = pt->serial_number;
-+ } else {
-+ memset(t, 0, sizeof(struct yaffs_ext_tags));
-+ }
-+}
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_packedtags1.h linux-3.12.20/fs/yaffs2/yaffs_packedtags1.h
---- linux-3.12.20.orig/fs/yaffs2/yaffs_packedtags1.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_packedtags1.h 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,39 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+/* This is used to pack YAFFS1 tags, not YAFFS2 tags. */
-+
-+#ifndef __YAFFS_PACKEDTAGS1_H__
-+#define __YAFFS_PACKEDTAGS1_H__
-+
-+#include "yaffs_guts.h"
-+
-+struct yaffs_packed_tags1 {
-+ u32 chunk_id:20;
-+ u32 serial_number:2;
-+ u32 n_bytes:10;
-+ u32 obj_id:18;
-+ u32 ecc:12;
-+ u32 deleted:1;
-+ u32 unused_stuff:1;
-+ unsigned should_be_ff;
-+
-+};
-+
-+void yaffs_pack_tags1(struct yaffs_packed_tags1 *pt,
-+ const struct yaffs_ext_tags *t);
-+void yaffs_unpack_tags1(struct yaffs_ext_tags *t,
-+ const struct yaffs_packed_tags1 *pt);
-+#endif
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_packedtags2.c linux-3.12.20/fs/yaffs2/yaffs_packedtags2.c
---- linux-3.12.20.orig/fs/yaffs2/yaffs_packedtags2.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_packedtags2.c 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,197 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_packedtags2.h"
-+#include "yportenv.h"
-+#include "yaffs_trace.h"
-+
-+/* This code packs a set of extended tags into a binary structure for
-+ * NAND storage
-+ */
-+
-+/* Some of the information is "extra" struff which can be packed in to
-+ * speed scanning
-+ * This is defined by having the EXTRA_HEADER_INFO_FLAG set.
-+ */
-+
-+/* Extra flags applied to chunk_id */
-+
-+#define EXTRA_HEADER_INFO_FLAG 0x80000000
-+#define EXTRA_SHRINK_FLAG 0x40000000
-+#define EXTRA_SHADOWS_FLAG 0x20000000
-+#define EXTRA_SPARE_FLAGS 0x10000000
-+
-+#define ALL_EXTRA_FLAGS 0xf0000000
-+
-+/* Also, the top 4 bits of the object Id are set to the object type. */
-+#define EXTRA_OBJECT_TYPE_SHIFT (28)
-+#define EXTRA_OBJECT_TYPE_MASK ((0x0f) << EXTRA_OBJECT_TYPE_SHIFT)
-+
-+static void yaffs_dump_packed_tags2_tags_only(
-+ const struct yaffs_packed_tags2_tags_only *ptt)
-+{
-+ yaffs_trace(YAFFS_TRACE_MTD,
-+ "packed tags obj %d chunk %d byte %d seq %d",
-+ ptt->obj_id, ptt->chunk_id, ptt->n_bytes, ptt->seq_number);
-+}
-+
-+static void yaffs_dump_packed_tags2(const struct yaffs_packed_tags2 *pt)
-+{
-+ yaffs_dump_packed_tags2_tags_only(&pt->t);
-+}
-+
-+static void yaffs_dump_tags2(const struct yaffs_ext_tags *t)
-+{
-+ yaffs_trace(YAFFS_TRACE_MTD,
-+ "ext.tags eccres %d blkbad %d chused %d obj %d chunk%d byte %d del %d ser %d seq %d",
-+ t->ecc_result, t->block_bad, t->chunk_used, t->obj_id,
-+ t->chunk_id, t->n_bytes, t->is_deleted, t->serial_number,
-+ t->seq_number);
-+
-+}
-+
-+static int yaffs_check_tags_extra_packable(const struct yaffs_ext_tags *t)
-+{
-+ if (t->chunk_id != 0 || !t->extra_available)
-+ return 0;
-+
-+ /* Check if the file size is too long to store */
-+ if (t->extra_obj_type == YAFFS_OBJECT_TYPE_FILE &&
-+ (t->extra_file_size >> 31) != 0)
-+ return 0;
-+ return 1;
-+}
-+
-+void yaffs_pack_tags2_tags_only(struct yaffs_packed_tags2_tags_only *ptt,
-+ const struct yaffs_ext_tags *t)
-+{
-+ ptt->chunk_id = t->chunk_id;
-+ ptt->seq_number = t->seq_number;
-+ ptt->n_bytes = t->n_bytes;
-+ ptt->obj_id = t->obj_id;
-+
-+ /* Only store extra tags for object headers.
-+ * If it is a file then only store if the file size is short\
-+ * enough to fit.
-+ */
-+ if (yaffs_check_tags_extra_packable(t)) {
-+ /* Store the extra header info instead */
-+ /* We save the parent object in the chunk_id */
-+ ptt->chunk_id = EXTRA_HEADER_INFO_FLAG | t->extra_parent_id;
-+ if (t->extra_is_shrink)
-+ ptt->chunk_id |= EXTRA_SHRINK_FLAG;
-+ if (t->extra_shadows)
-+ ptt->chunk_id |= EXTRA_SHADOWS_FLAG;
-+
-+ ptt->obj_id &= ~EXTRA_OBJECT_TYPE_MASK;
-+ ptt->obj_id |= (t->extra_obj_type << EXTRA_OBJECT_TYPE_SHIFT);
-+
-+ if (t->extra_obj_type == YAFFS_OBJECT_TYPE_HARDLINK)
-+ ptt->n_bytes = t->extra_equiv_id;
-+ else if (t->extra_obj_type == YAFFS_OBJECT_TYPE_FILE)
-+ ptt->n_bytes = (unsigned) t->extra_file_size;
-+ else
-+ ptt->n_bytes = 0;
-+ }
-+
-+ yaffs_dump_packed_tags2_tags_only(ptt);
-+ yaffs_dump_tags2(t);
-+}
-+
-+void yaffs_pack_tags2(struct yaffs_packed_tags2 *pt,
-+ const struct yaffs_ext_tags *t, int tags_ecc)
-+{
-+ yaffs_pack_tags2_tags_only(&pt->t, t);
-+
-+ if (tags_ecc)
-+ yaffs_ecc_calc_other((unsigned char *)&pt->t,
-+ sizeof(struct yaffs_packed_tags2_tags_only),
-+ &pt->ecc);
-+}
-+
-+void yaffs_unpack_tags2_tags_only(struct yaffs_ext_tags *t,
-+ struct yaffs_packed_tags2_tags_only *ptt)
-+{
-+ memset(t, 0, sizeof(struct yaffs_ext_tags));
-+
-+ if (ptt->seq_number == 0xffffffff)
-+ return;
-+
-+ t->block_bad = 0;
-+ t->chunk_used = 1;
-+ t->obj_id = ptt->obj_id;
-+ t->chunk_id = ptt->chunk_id;
-+ t->n_bytes = ptt->n_bytes;
-+ t->is_deleted = 0;
-+ t->serial_number = 0;
-+ t->seq_number = ptt->seq_number;
-+
-+ /* Do extra header info stuff */
-+ if (ptt->chunk_id & EXTRA_HEADER_INFO_FLAG) {
-+ t->chunk_id = 0;
-+ t->n_bytes = 0;
-+
-+ t->extra_available = 1;
-+ t->extra_parent_id = ptt->chunk_id & (~(ALL_EXTRA_FLAGS));
-+ t->extra_is_shrink = ptt->chunk_id & EXTRA_SHRINK_FLAG ? 1 : 0;
-+ t->extra_shadows = ptt->chunk_id & EXTRA_SHADOWS_FLAG ? 1 : 0;
-+ t->extra_obj_type = ptt->obj_id >> EXTRA_OBJECT_TYPE_SHIFT;
-+ t->obj_id &= ~EXTRA_OBJECT_TYPE_MASK;
-+
-+ if (t->extra_obj_type == YAFFS_OBJECT_TYPE_HARDLINK)
-+ t->extra_equiv_id = ptt->n_bytes;
-+ else
-+ t->extra_file_size = ptt->n_bytes;
-+ }
-+ yaffs_dump_packed_tags2_tags_only(ptt);
-+ yaffs_dump_tags2(t);
-+}
-+
-+void yaffs_unpack_tags2(struct yaffs_ext_tags *t, struct yaffs_packed_tags2 *pt,
-+ int tags_ecc)
-+{
-+ enum yaffs_ecc_result ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
-+
-+ if (pt->t.seq_number != 0xffffffff && tags_ecc) {
-+ /* Chunk is in use and we need to do ECC */
-+
-+ struct yaffs_ecc_other ecc;
-+ int result;
-+ yaffs_ecc_calc_other((unsigned char *)&pt->t,
-+ sizeof(struct yaffs_packed_tags2_tags_only),
-+ &ecc);
-+ result =
-+ yaffs_ecc_correct_other((unsigned char *)&pt->t,
-+ sizeof(struct yaffs_packed_tags2_tags_only),
-+ &pt->ecc, &ecc);
-+ switch (result) {
-+ case 0:
-+ ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
-+ break;
-+ case 1:
-+ ecc_result = YAFFS_ECC_RESULT_FIXED;
-+ break;
-+ case -1:
-+ ecc_result = YAFFS_ECC_RESULT_UNFIXED;
-+ break;
-+ default:
-+ ecc_result = YAFFS_ECC_RESULT_UNKNOWN;
-+ }
-+ }
-+ yaffs_unpack_tags2_tags_only(t, &pt->t);
-+
-+ t->ecc_result = ecc_result;
-+
-+ yaffs_dump_packed_tags2(pt);
-+ yaffs_dump_tags2(t);
-+}
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_packedtags2.h linux-3.12.20/fs/yaffs2/yaffs_packedtags2.h
---- linux-3.12.20.orig/fs/yaffs2/yaffs_packedtags2.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_packedtags2.h 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,47 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+/* This is used to pack YAFFS2 tags, not YAFFS1tags. */
-+
-+#ifndef __YAFFS_PACKEDTAGS2_H__
-+#define __YAFFS_PACKEDTAGS2_H__
-+
-+#include "yaffs_guts.h"
-+#include "yaffs_ecc.h"
-+
-+struct yaffs_packed_tags2_tags_only {
-+ unsigned seq_number;
-+ unsigned obj_id;
-+ unsigned chunk_id;
-+ unsigned n_bytes;
-+};
-+
-+struct yaffs_packed_tags2 {
-+ struct yaffs_packed_tags2_tags_only t;
-+ struct yaffs_ecc_other ecc;
-+};
-+
-+/* Full packed tags with ECC, used for oob tags */
-+void yaffs_pack_tags2(struct yaffs_packed_tags2 *pt,
-+ const struct yaffs_ext_tags *t, int tags_ecc);
-+void yaffs_unpack_tags2(struct yaffs_ext_tags *t, struct yaffs_packed_tags2 *pt,
-+ int tags_ecc);
-+
-+/* Only the tags part (no ECC for use with inband tags */
-+void yaffs_pack_tags2_tags_only(struct yaffs_packed_tags2_tags_only *pt,
-+ const struct yaffs_ext_tags *t);
-+void yaffs_unpack_tags2_tags_only(struct yaffs_ext_tags *t,
-+ struct yaffs_packed_tags2_tags_only *pt);
-+#endif
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_summary.c linux-3.12.20/fs/yaffs2/yaffs_summary.c
---- linux-3.12.20.orig/fs/yaffs2/yaffs_summary.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_summary.c 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,312 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+/* Summaries write the useful part of the tags for the chunks in a block into an
-+ * an array which is written to the last n chunks of the block.
-+ * Reading the summaries gives all the tags for the block in one read. Much
-+ * faster.
-+ *
-+ * Chunks holding summaries are marked with tags making it look like
-+ * they are part of a fake file.
-+ *
-+ * The summary could also be used during gc.
-+ *
-+ */
-+
-+#include "yaffs_summary.h"
-+#include "yaffs_packedtags2.h"
-+#include "yaffs_nand.h"
-+#include "yaffs_getblockinfo.h"
-+#include "yaffs_bitmap.h"
-+
-+/*
-+ * The summary is built up in an array of summary tags.
-+ * This gets written to the last one or two (maybe more) chunks in a block.
-+ * A summary header is written as the first part of each chunk of summary data.
-+ * The summary header must match or the summary is rejected.
-+ */
-+
-+/* Summary tags don't need the sequence number because that is redundant. */
-+struct yaffs_summary_tags {
-+ unsigned obj_id;
-+ unsigned chunk_id;
-+ unsigned n_bytes;
-+};
-+
-+/* Summary header */
-+struct yaffs_summary_header {
-+ unsigned version; /* Must match current version */
-+ unsigned block; /* Must be this block */
-+ unsigned seq; /* Must be this sequence number */
-+ unsigned sum; /* Just add up all the bytes in the tags */
-+};
-+
-+
-+static void yaffs_summary_clear(struct yaffs_dev *dev)
-+{
-+ if (!dev->sum_tags)
-+ return;
-+ memset(dev->sum_tags, 0, dev->chunks_per_summary *
-+ sizeof(struct yaffs_summary_tags));
-+}
-+
-+
-+void yaffs_summary_deinit(struct yaffs_dev *dev)
-+{
-+ kfree(dev->sum_tags);
-+ dev->sum_tags = NULL;
-+ kfree(dev->gc_sum_tags);
-+ dev->gc_sum_tags = NULL;
-+ dev->chunks_per_summary = 0;
-+}
-+
-+int yaffs_summary_init(struct yaffs_dev *dev)
-+{
-+ int sum_bytes;
-+ int chunks_used; /* Number of chunks used by summary */
-+ int sum_tags_bytes;
-+
-+ sum_bytes = dev->param.chunks_per_block *
-+ sizeof(struct yaffs_summary_tags);
-+
-+ chunks_used = (sum_bytes + dev->data_bytes_per_chunk - 1)/
-+ (dev->data_bytes_per_chunk -
-+ sizeof(struct yaffs_summary_header));
-+
-+ dev->chunks_per_summary = dev->param.chunks_per_block - chunks_used;
-+ sum_tags_bytes = sizeof(struct yaffs_summary_tags) *
-+ dev->chunks_per_summary;
-+ dev->sum_tags = kmalloc(sum_tags_bytes, GFP_NOFS);
-+ dev->gc_sum_tags = kmalloc(sum_tags_bytes, GFP_NOFS);
-+ if (!dev->sum_tags || !dev->gc_sum_tags) {
-+ yaffs_summary_deinit(dev);
-+ return YAFFS_FAIL;
-+ }
-+
-+ yaffs_summary_clear(dev);
-+
-+ return YAFFS_OK;
-+}
-+
-+static unsigned yaffs_summary_sum(struct yaffs_dev *dev)
-+{
-+ u8 *sum_buffer = (u8 *)dev->sum_tags;
-+ int i;
-+ unsigned sum = 0;
-+
-+ i = sizeof(struct yaffs_summary_tags) *
-+ dev->chunks_per_summary;
-+ while (i > 0) {
-+ sum += *sum_buffer;
-+ sum_buffer++;
-+ i--;
-+ }
-+
-+ return sum;
-+}
-+
-+static int yaffs_summary_write(struct yaffs_dev *dev, int blk)
-+{
-+ struct yaffs_ext_tags tags;
-+ u8 *buffer;
-+ u8 *sum_buffer = (u8 *)dev->sum_tags;
-+ int n_bytes;
-+ int chunk_in_nand;
-+ int chunk_in_block;
-+ int result;
-+ int this_tx;
-+ struct yaffs_summary_header hdr;
-+ int sum_bytes_per_chunk = dev->data_bytes_per_chunk - sizeof(hdr);
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, blk);
-+
-+ buffer = yaffs_get_temp_buffer(dev);
-+ n_bytes = sizeof(struct yaffs_summary_tags) *
-+ dev->chunks_per_summary;
-+ memset(&tags, 0, sizeof(struct yaffs_ext_tags));
-+ tags.obj_id = YAFFS_OBJECTID_SUMMARY;
-+ tags.chunk_id = 1;
-+ chunk_in_block = dev->chunks_per_summary;
-+ chunk_in_nand = dev->alloc_block * dev->param.chunks_per_block +
-+ dev->chunks_per_summary;
-+ hdr.version = YAFFS_SUMMARY_VERSION;
-+ hdr.block = blk;
-+ hdr.seq = bi->seq_number;
-+ hdr.sum = yaffs_summary_sum(dev);
-+
-+ do {
-+ this_tx = n_bytes;
-+ if (this_tx > sum_bytes_per_chunk)
-+ this_tx = sum_bytes_per_chunk;
-+ memcpy(buffer, &hdr, sizeof(hdr));
-+ memcpy(buffer + sizeof(hdr), sum_buffer, this_tx);
-+ tags.n_bytes = this_tx + sizeof(hdr);
-+ result = yaffs_wr_chunk_tags_nand(dev, chunk_in_nand,
-+ buffer, &tags);
-+
-+ if (result != YAFFS_OK)
-+ break;
-+ yaffs_set_chunk_bit(dev, blk, chunk_in_block);
-+ bi->pages_in_use++;
-+ dev->n_free_chunks--;
-+
-+ n_bytes -= this_tx;
-+ sum_buffer += this_tx;
-+ chunk_in_nand++;
-+ chunk_in_block++;
-+ tags.chunk_id++;
-+ } while (result == YAFFS_OK && n_bytes > 0);
-+ yaffs_release_temp_buffer(dev, buffer);
-+
-+
-+ if (result == YAFFS_OK)
-+ bi->has_summary = 1;
-+
-+
-+ return result;
-+}
-+
-+int yaffs_summary_read(struct yaffs_dev *dev,
-+ struct yaffs_summary_tags *st,
-+ int blk)
-+{
-+ struct yaffs_ext_tags tags;
-+ u8 *buffer;
-+ u8 *sum_buffer = (u8 *)st;
-+ int n_bytes;
-+ int chunk_id;
-+ int chunk_in_nand;
-+ int chunk_in_block;
-+ int result;
-+ int this_tx;
-+ struct yaffs_summary_header hdr;
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, blk);
-+ int sum_bytes_per_chunk = dev->data_bytes_per_chunk - sizeof(hdr);
-+ int sum_tags_bytes;
-+
-+ sum_tags_bytes = sizeof(struct yaffs_summary_tags) *
-+ dev->chunks_per_summary;
-+ buffer = yaffs_get_temp_buffer(dev);
-+ n_bytes = sizeof(struct yaffs_summary_tags) * dev->chunks_per_summary;
-+ chunk_in_block = dev->chunks_per_summary;
-+ chunk_in_nand = blk * dev->param.chunks_per_block +
-+ dev->chunks_per_summary;
-+ chunk_id = 1;
-+ do {
-+ this_tx = n_bytes;
-+ if (this_tx > sum_bytes_per_chunk)
-+ this_tx = sum_bytes_per_chunk;
-+ result = yaffs_rd_chunk_tags_nand(dev, chunk_in_nand,
-+ buffer, &tags);
-+
-+ if (tags.chunk_id != chunk_id ||
-+ tags.obj_id != YAFFS_OBJECTID_SUMMARY ||
-+ tags.chunk_used == 0 ||
-+ tags.ecc_result > YAFFS_ECC_RESULT_FIXED ||
-+ tags.n_bytes != (this_tx + sizeof(hdr)))
-+ result = YAFFS_FAIL;
-+ if (result != YAFFS_OK)
-+ break;
-+
-+ if (st == dev->sum_tags) {
-+ /* If we're scanning then update the block info */
-+ yaffs_set_chunk_bit(dev, blk, chunk_in_block);
-+ bi->pages_in_use++;
-+ }
-+ memcpy(&hdr, buffer, sizeof(hdr));
-+ memcpy(sum_buffer, buffer + sizeof(hdr), this_tx);
-+ n_bytes -= this_tx;
-+ sum_buffer += this_tx;
-+ chunk_in_nand++;
-+ chunk_in_block++;
-+ chunk_id++;
-+ } while (result == YAFFS_OK && n_bytes > 0);
-+ yaffs_release_temp_buffer(dev, buffer);
-+
-+ if (result == YAFFS_OK) {
-+ /* Verify header */
-+ if (hdr.version != YAFFS_SUMMARY_VERSION ||
-+ hdr.seq != bi->seq_number ||
-+ hdr.sum != yaffs_summary_sum(dev))
-+ result = YAFFS_FAIL;
-+ }
-+
-+ if (st == dev->sum_tags && result == YAFFS_OK)
-+ bi->has_summary = 1;
-+
-+ return result;
-+}
-+
-+int yaffs_summary_add(struct yaffs_dev *dev,
-+ struct yaffs_ext_tags *tags,
-+ int chunk_in_nand)
-+{
-+ struct yaffs_packed_tags2_tags_only tags_only;
-+ struct yaffs_summary_tags *sum_tags;
-+ int block_in_nand = chunk_in_nand / dev->param.chunks_per_block;
-+ int chunk_in_block = chunk_in_nand % dev->param.chunks_per_block;
-+
-+ if (!dev->sum_tags)
-+ return YAFFS_OK;
-+
-+ if (chunk_in_block >= 0 && chunk_in_block < dev->chunks_per_summary) {
-+ yaffs_pack_tags2_tags_only(&tags_only, tags);
-+ sum_tags = &dev->sum_tags[chunk_in_block];
-+ sum_tags->chunk_id = tags_only.chunk_id;
-+ sum_tags->n_bytes = tags_only.n_bytes;
-+ sum_tags->obj_id = tags_only.obj_id;
-+
-+ if (chunk_in_block == dev->chunks_per_summary - 1) {
-+ /* Time to write out the summary */
-+ yaffs_summary_write(dev, block_in_nand);
-+ yaffs_summary_clear(dev);
-+ yaffs_skip_rest_of_block(dev);
-+ }
-+ }
-+ return YAFFS_OK;
-+}
-+
-+int yaffs_summary_fetch(struct yaffs_dev *dev,
-+ struct yaffs_ext_tags *tags,
-+ int chunk_in_block)
-+{
-+ struct yaffs_packed_tags2_tags_only tags_only;
-+ struct yaffs_summary_tags *sum_tags;
-+ if (chunk_in_block >= 0 && chunk_in_block < dev->chunks_per_summary) {
-+ sum_tags = &dev->sum_tags[chunk_in_block];
-+ tags_only.chunk_id = sum_tags->chunk_id;
-+ tags_only.n_bytes = sum_tags->n_bytes;
-+ tags_only.obj_id = sum_tags->obj_id;
-+ yaffs_unpack_tags2_tags_only(tags, &tags_only);
-+ return YAFFS_OK;
-+ }
-+ return YAFFS_FAIL;
-+}
-+
-+void yaffs_summary_gc(struct yaffs_dev *dev, int blk)
-+{
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, blk);
-+ int i;
-+
-+ if (!bi->has_summary)
-+ return;
-+
-+ for (i = dev->chunks_per_summary;
-+ i < dev->param.chunks_per_block;
-+ i++) {
-+ if (yaffs_check_chunk_bit(dev, blk, i)) {
-+ yaffs_clear_chunk_bit(dev, blk, i);
-+ bi->pages_in_use--;
-+ dev->n_free_chunks++;
-+ }
-+ }
-+}
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_summary.h linux-3.12.20/fs/yaffs2/yaffs_summary.h
---- linux-3.12.20.orig/fs/yaffs2/yaffs_summary.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_summary.h 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,37 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_SUMMARY_H__
-+#define __YAFFS_SUMMARY_H__
-+
-+#include "yaffs_packedtags2.h"
-+
-+
-+int yaffs_summary_init(struct yaffs_dev *dev);
-+void yaffs_summary_deinit(struct yaffs_dev *dev);
-+
-+int yaffs_summary_add(struct yaffs_dev *dev,
-+ struct yaffs_ext_tags *tags,
-+ int chunk_in_block);
-+int yaffs_summary_fetch(struct yaffs_dev *dev,
-+ struct yaffs_ext_tags *tags,
-+ int chunk_in_block);
-+int yaffs_summary_read(struct yaffs_dev *dev,
-+ struct yaffs_summary_tags *st,
-+ int blk);
-+void yaffs_summary_gc(struct yaffs_dev *dev, int blk);
-+
-+
-+#endif
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_tagscompat.c linux-3.12.20/fs/yaffs2/yaffs_tagscompat.c
---- linux-3.12.20.orig/fs/yaffs2/yaffs_tagscompat.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_tagscompat.c 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,381 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_guts.h"
-+#include "yaffs_tagscompat.h"
-+#include "yaffs_ecc.h"
-+#include "yaffs_getblockinfo.h"
-+#include "yaffs_trace.h"
-+
-+static void yaffs_handle_rd_data_error(struct yaffs_dev *dev, int nand_chunk);
-+
-+
-+/********** Tags ECC calculations *********/
-+
-+
-+void yaffs_calc_tags_ecc(struct yaffs_tags *tags)
-+{
-+ /* Calculate an ecc */
-+ unsigned char *b = ((union yaffs_tags_union *)tags)->as_bytes;
-+ unsigned i, j;
-+ unsigned ecc = 0;
-+ unsigned bit = 0;
-+
-+ tags->ecc = 0;
-+
-+ for (i = 0; i < 8; i++) {
-+ for (j = 1; j & 0xff; j <<= 1) {
-+ bit++;
-+ if (b[i] & j)
-+ ecc ^= bit;
-+ }
-+ }
-+ tags->ecc = ecc;
-+}
-+
-+int yaffs_check_tags_ecc(struct yaffs_tags *tags)
-+{
-+ unsigned ecc = tags->ecc;
-+
-+ yaffs_calc_tags_ecc(tags);
-+
-+ ecc ^= tags->ecc;
-+
-+ if (ecc && ecc <= 64) {
-+ /* TODO: Handle the failure better. Retire? */
-+ unsigned char *b = ((union yaffs_tags_union *)tags)->as_bytes;
-+
-+ ecc--;
-+
-+ b[ecc / 8] ^= (1 << (ecc & 7));
-+
-+ /* Now recvalc the ecc */
-+ yaffs_calc_tags_ecc(tags);
-+
-+ return 1; /* recovered error */
-+ } else if (ecc) {
-+ /* Wierd ecc failure value */
-+ /* TODO Need to do somethiong here */
-+ return -1; /* unrecovered error */
-+ }
-+ return 0;
-+}
-+
-+/********** Tags **********/
-+
-+static void yaffs_load_tags_to_spare(struct yaffs_spare *spare_ptr,
-+ struct yaffs_tags *tags_ptr)
-+{
-+ union yaffs_tags_union *tu = (union yaffs_tags_union *)tags_ptr;
-+
-+ yaffs_calc_tags_ecc(tags_ptr);
-+
-+ spare_ptr->tb0 = tu->as_bytes[0];
-+ spare_ptr->tb1 = tu->as_bytes[1];
-+ spare_ptr->tb2 = tu->as_bytes[2];
-+ spare_ptr->tb3 = tu->as_bytes[3];
-+ spare_ptr->tb4 = tu->as_bytes[4];
-+ spare_ptr->tb5 = tu->as_bytes[5];
-+ spare_ptr->tb6 = tu->as_bytes[6];
-+ spare_ptr->tb7 = tu->as_bytes[7];
-+}
-+
-+static void yaffs_get_tags_from_spare(struct yaffs_dev *dev,
-+ struct yaffs_spare *spare_ptr,
-+ struct yaffs_tags *tags_ptr)
-+{
-+ union yaffs_tags_union *tu = (union yaffs_tags_union *)tags_ptr;
-+ int result;
-+
-+ tu->as_bytes[0] = spare_ptr->tb0;
-+ tu->as_bytes[1] = spare_ptr->tb1;
-+ tu->as_bytes[2] = spare_ptr->tb2;
-+ tu->as_bytes[3] = spare_ptr->tb3;
-+ tu->as_bytes[4] = spare_ptr->tb4;
-+ tu->as_bytes[5] = spare_ptr->tb5;
-+ tu->as_bytes[6] = spare_ptr->tb6;
-+ tu->as_bytes[7] = spare_ptr->tb7;
-+
-+ result = yaffs_check_tags_ecc(tags_ptr);
-+ if (result > 0)
-+ dev->n_tags_ecc_fixed++;
-+ else if (result < 0)
-+ dev->n_tags_ecc_unfixed++;
-+}
-+
-+static void yaffs_spare_init(struct yaffs_spare *spare)
-+{
-+ memset(spare, 0xff, sizeof(struct yaffs_spare));
-+}
-+
-+static int yaffs_wr_nand(struct yaffs_dev *dev,
-+ int nand_chunk, const u8 *data,
-+ struct yaffs_spare *spare)
-+{
-+ int data_size = dev->data_bytes_per_chunk;
-+
-+ return dev->drv.drv_write_chunk_fn(dev, nand_chunk,
-+ data, data_size,
-+ (u8 *) spare, sizeof(*spare));
-+}
-+
-+static int yaffs_rd_chunk_nand(struct yaffs_dev *dev,
-+ int nand_chunk,
-+ u8 *data,
-+ struct yaffs_spare *spare,
-+ enum yaffs_ecc_result *ecc_result,
-+ int correct_errors)
-+{
-+ int ret_val;
-+ struct yaffs_spare local_spare;
-+ int data_size;
-+ int spare_size;
-+ int ecc_result1, ecc_result2;
-+ u8 calc_ecc[3];
-+
-+ if (!spare) {
-+ /* If we don't have a real spare, then we use a local one. */
-+ /* Need this for the calculation of the ecc */
-+ spare = &local_spare;
-+ }
-+ data_size = dev->data_bytes_per_chunk;
-+ spare_size = sizeof(struct yaffs_spare);
-+
-+ if (dev->param.use_nand_ecc)
-+ return dev->drv.drv_read_chunk_fn(dev, nand_chunk,
-+ data, data_size,
-+ (u8 *) spare, spare_size,
-+ ecc_result);
-+
-+
-+ /* Handle the ECC at this level. */
-+
-+ ret_val = dev->drv.drv_read_chunk_fn(dev, nand_chunk,
-+ data, data_size,
-+ (u8 *)spare, spare_size,
-+ NULL);
-+ if (!data || !correct_errors)
-+ return ret_val;
-+
-+ /* Do ECC correction if needed. */
-+ yaffs_ecc_calc(data, calc_ecc);
-+ ecc_result1 = yaffs_ecc_correct(data, spare->ecc1, calc_ecc);
-+ yaffs_ecc_calc(&data[256], calc_ecc);
-+ ecc_result2 = yaffs_ecc_correct(&data[256], spare->ecc2, calc_ecc);
-+
-+ if (ecc_result1 > 0) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "**>>yaffs ecc error fix performed on chunk %d:0",
-+ nand_chunk);
-+ dev->n_ecc_fixed++;
-+ } else if (ecc_result1 < 0) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "**>>yaffs ecc error unfixed on chunk %d:0",
-+ nand_chunk);
-+ dev->n_ecc_unfixed++;
-+ }
-+
-+ if (ecc_result2 > 0) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "**>>yaffs ecc error fix performed on chunk %d:1",
-+ nand_chunk);
-+ dev->n_ecc_fixed++;
-+ } else if (ecc_result2 < 0) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "**>>yaffs ecc error unfixed on chunk %d:1",
-+ nand_chunk);
-+ dev->n_ecc_unfixed++;
-+ }
-+
-+ if (ecc_result1 || ecc_result2) {
-+ /* We had a data problem on this page */
-+ yaffs_handle_rd_data_error(dev, nand_chunk);
-+ }
-+
-+ if (ecc_result1 < 0 || ecc_result2 < 0)
-+ *ecc_result = YAFFS_ECC_RESULT_UNFIXED;
-+ else if (ecc_result1 > 0 || ecc_result2 > 0)
-+ *ecc_result = YAFFS_ECC_RESULT_FIXED;
-+ else
-+ *ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
-+
-+ return ret_val;
-+}
-+
-+/*
-+ * Functions for robustisizing
-+ */
-+
-+static void yaffs_handle_rd_data_error(struct yaffs_dev *dev, int nand_chunk)
-+{
-+ int flash_block = nand_chunk / dev->param.chunks_per_block;
-+
-+ /* Mark the block for retirement */
-+ yaffs_get_block_info(dev, flash_block + dev->block_offset)->
-+ needs_retiring = 1;
-+ yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
-+ "**>>Block %d marked for retirement",
-+ flash_block);
-+
-+ /* TODO:
-+ * Just do a garbage collection on the affected block
-+ * then retire the block
-+ * NB recursion
-+ */
-+}
-+
-+static int yaffs_tags_compat_wr(struct yaffs_dev *dev,
-+ int nand_chunk,
-+ const u8 *data, const struct yaffs_ext_tags *ext_tags)
-+{
-+ struct yaffs_spare spare;
-+ struct yaffs_tags tags;
-+
-+ yaffs_spare_init(&spare);
-+
-+ if (ext_tags->is_deleted)
-+ spare.page_status = 0;
-+ else {
-+ tags.obj_id = ext_tags->obj_id;
-+ tags.chunk_id = ext_tags->chunk_id;
-+
-+ tags.n_bytes_lsb = ext_tags->n_bytes & (1024 - 1);
-+
-+ if (dev->data_bytes_per_chunk >= 1024)
-+ tags.n_bytes_msb = (ext_tags->n_bytes >> 10) & 3;
-+ else
-+ tags.n_bytes_msb = 3;
-+
-+ tags.serial_number = ext_tags->serial_number;
-+
-+ if (!dev->param.use_nand_ecc && data) {
-+ yaffs_ecc_calc(data, spare.ecc1);
-+ yaffs_ecc_calc(&data[256], spare.ecc2);
-+ }
-+
-+ yaffs_load_tags_to_spare(&spare, &tags);
-+ }
-+ return yaffs_wr_nand(dev, nand_chunk, data, &spare);
-+}
-+
-+static int yaffs_tags_compat_rd(struct yaffs_dev *dev,
-+ int nand_chunk,
-+ u8 *data, struct yaffs_ext_tags *ext_tags)
-+{
-+ struct yaffs_spare spare;
-+ struct yaffs_tags tags;
-+ enum yaffs_ecc_result ecc_result = YAFFS_ECC_RESULT_UNKNOWN;
-+ static struct yaffs_spare spare_ff;
-+ static int init;
-+ int deleted;
-+
-+ if (!init) {
-+ memset(&spare_ff, 0xff, sizeof(spare_ff));
-+ init = 1;
-+ }
-+
-+ if (!yaffs_rd_chunk_nand(dev, nand_chunk,
-+ data, &spare, &ecc_result, 1))
-+ return YAFFS_FAIL;
-+
-+ /* ext_tags may be NULL */
-+ if (!ext_tags)
-+ return YAFFS_OK;
-+
-+ deleted = (hweight8(spare.page_status) < 7) ? 1 : 0;
-+
-+ ext_tags->is_deleted = deleted;
-+ ext_tags->ecc_result = ecc_result;
-+ ext_tags->block_bad = 0; /* We're reading it */
-+ /* therefore it is not a bad block */
-+ ext_tags->chunk_used =
-+ memcmp(&spare_ff, &spare, sizeof(spare_ff)) ? 1 : 0;
-+
-+ if (ext_tags->chunk_used) {
-+ yaffs_get_tags_from_spare(dev, &spare, &tags);
-+ ext_tags->obj_id = tags.obj_id;
-+ ext_tags->chunk_id = tags.chunk_id;
-+ ext_tags->n_bytes = tags.n_bytes_lsb;
-+
-+ if (dev->data_bytes_per_chunk >= 1024)
-+ ext_tags->n_bytes |=
-+ (((unsigned)tags.n_bytes_msb) << 10);
-+
-+ ext_tags->serial_number = tags.serial_number;
-+ }
-+
-+ return YAFFS_OK;
-+}
-+
-+static int yaffs_tags_compat_mark_bad(struct yaffs_dev *dev, int flash_block)
-+{
-+ struct yaffs_spare spare;
-+
-+ memset(&spare, 0xff, sizeof(struct yaffs_spare));
-+
-+ spare.block_status = 'Y';
-+
-+ yaffs_wr_nand(dev, flash_block * dev->param.chunks_per_block, NULL,
-+ &spare);
-+ yaffs_wr_nand(dev, flash_block * dev->param.chunks_per_block + 1,
-+ NULL, &spare);
-+
-+ return YAFFS_OK;
-+}
-+
-+static int yaffs_tags_compat_query_block(struct yaffs_dev *dev,
-+ int block_no,
-+ enum yaffs_block_state *state,
-+ u32 *seq_number)
-+{
-+ struct yaffs_spare spare0, spare1;
-+ static struct yaffs_spare spare_ff;
-+ static int init;
-+ enum yaffs_ecc_result dummy;
-+
-+ if (!init) {
-+ memset(&spare_ff, 0xff, sizeof(spare_ff));
-+ init = 1;
-+ }
-+
-+ *seq_number = 0;
-+
-+ /* Look for bad block markers in the first two chunks */
-+ yaffs_rd_chunk_nand(dev, block_no * dev->param.chunks_per_block,
-+ NULL, &spare0, &dummy, 0);
-+ yaffs_rd_chunk_nand(dev, block_no * dev->param.chunks_per_block + 1,
-+ NULL, &spare1, &dummy, 0);
-+
-+ if (hweight8(spare0.block_status & spare1.block_status) < 7)
-+ *state = YAFFS_BLOCK_STATE_DEAD;
-+ else if (memcmp(&spare_ff, &spare0, sizeof(spare_ff)) == 0)
-+ *state = YAFFS_BLOCK_STATE_EMPTY;
-+ else
-+ *state = YAFFS_BLOCK_STATE_NEEDS_SCAN;
-+
-+ return YAFFS_OK;
-+}
-+
-+void yaffs_tags_compat_install(struct yaffs_dev *dev)
-+{
-+ if(dev->param.is_yaffs2)
-+ return;
-+ if(!dev->tagger.write_chunk_tags_fn)
-+ dev->tagger.write_chunk_tags_fn = yaffs_tags_compat_wr;
-+ if(!dev->tagger.read_chunk_tags_fn)
-+ dev->tagger.read_chunk_tags_fn = yaffs_tags_compat_rd;
-+ if(!dev->tagger.query_block_fn)
-+ dev->tagger.query_block_fn = yaffs_tags_compat_query_block;
-+ if(!dev->tagger.mark_bad_fn)
-+ dev->tagger.mark_bad_fn = yaffs_tags_compat_mark_bad;
-+}
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_tagscompat.h linux-3.12.20/fs/yaffs2/yaffs_tagscompat.h
---- linux-3.12.20.orig/fs/yaffs2/yaffs_tagscompat.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_tagscompat.h 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,44 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_TAGSCOMPAT_H__
-+#define __YAFFS_TAGSCOMPAT_H__
-+
-+
-+#include "yaffs_guts.h"
-+
-+#if 0
-+
-+
-+int yaffs_tags_compat_wr(struct yaffs_dev *dev,
-+ int nand_chunk,
-+ const u8 *data, const struct yaffs_ext_tags *tags);
-+int yaffs_tags_compat_rd(struct yaffs_dev *dev,
-+ int nand_chunk,
-+ u8 *data, struct yaffs_ext_tags *tags);
-+int yaffs_tags_compat_mark_bad(struct yaffs_dev *dev, int block_no);
-+int yaffs_tags_compat_query_block(struct yaffs_dev *dev,
-+ int block_no,
-+ enum yaffs_block_state *state,
-+ u32 *seq_number);
-+
-+#endif
-+
-+
-+void yaffs_tags_compat_install(struct yaffs_dev *dev);
-+void yaffs_calc_tags_ecc(struct yaffs_tags *tags);
-+int yaffs_check_tags_ecc(struct yaffs_tags *tags);
-+
-+#endif
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_tagsmarshall.c linux-3.12.20/fs/yaffs2/yaffs_tagsmarshall.c
---- linux-3.12.20.orig/fs/yaffs2/yaffs_tagsmarshall.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_tagsmarshall.c 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,199 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_guts.h"
-+#include "yaffs_trace.h"
-+#include "yaffs_packedtags2.h"
-+
-+static int yaffs_tags_marshall_write(struct yaffs_dev *dev,
-+ int nand_chunk, const u8 *data,
-+ const struct yaffs_ext_tags *tags)
-+{
-+ struct yaffs_packed_tags2 pt;
-+ int retval;
-+
-+ int packed_tags_size =
-+ dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt);
-+ void *packed_tags_ptr =
-+ dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt;
-+
-+ yaffs_trace(YAFFS_TRACE_MTD,
-+ "yaffs_tags_marshall_write chunk %d data %p tags %p",
-+ nand_chunk, data, tags);
-+
-+ /* For yaffs2 writing there must be both data and tags.
-+ * If we're using inband tags, then the tags are stuffed into
-+ * the end of the data buffer.
-+ */
-+ if (!data || !tags)
-+ BUG();
-+ else if (dev->param.inband_tags) {
-+ struct yaffs_packed_tags2_tags_only *pt2tp;
-+ pt2tp =
-+ (struct yaffs_packed_tags2_tags_only *)(data +
-+ dev->
-+ data_bytes_per_chunk);
-+ yaffs_pack_tags2_tags_only(pt2tp, tags);
-+ } else {
-+ yaffs_pack_tags2(&pt, tags, !dev->param.no_tags_ecc);
-+ }
-+
-+ retval = dev->drv.drv_write_chunk_fn(dev, nand_chunk,
-+ data, dev->param.total_bytes_per_chunk,
-+ (dev->param.inband_tags) ? NULL : packed_tags_ptr,
-+ (dev->param.inband_tags) ? 0 : packed_tags_size);
-+
-+ return retval;
-+}
-+
-+static int yaffs_tags_marshall_read(struct yaffs_dev *dev,
-+ int nand_chunk, u8 *data,
-+ struct yaffs_ext_tags *tags)
-+{
-+ int retval = 0;
-+ int local_data = 0;
-+ u8 spare_buffer[100];
-+ enum yaffs_ecc_result ecc_result;
-+
-+ struct yaffs_packed_tags2 pt;
-+
-+ int packed_tags_size =
-+ dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt);
-+ void *packed_tags_ptr =
-+ dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt;
-+
-+ yaffs_trace(YAFFS_TRACE_MTD,
-+ "yaffs_tags_marshall_read chunk %d data %p tags %p",
-+ nand_chunk, data, tags);
-+
-+ if (dev->param.inband_tags) {
-+ if (!data) {
-+ local_data = 1;
-+ data = yaffs_get_temp_buffer(dev);
-+ }
-+ }
-+
-+ if (dev->param.inband_tags || (data && !tags))
-+ retval = dev->drv.drv_read_chunk_fn(dev, nand_chunk,
-+ data, dev->param.total_bytes_per_chunk,
-+ NULL, 0,
-+ &ecc_result);
-+ else if (tags)
-+ retval = dev->drv.drv_read_chunk_fn(dev, nand_chunk,
-+ data, dev->param.total_bytes_per_chunk,
-+ spare_buffer, packed_tags_size,
-+ &ecc_result);
-+ else
-+ BUG();
-+
-+
-+ if (dev->param.inband_tags) {
-+ if (tags) {
-+ struct yaffs_packed_tags2_tags_only *pt2tp;
-+ pt2tp =
-+ (struct yaffs_packed_tags2_tags_only *)
-+ &data[dev->data_bytes_per_chunk];
-+ yaffs_unpack_tags2_tags_only(tags, pt2tp);
-+ }
-+ } else if (tags) {
-+ memcpy(packed_tags_ptr, spare_buffer, packed_tags_size);
-+ yaffs_unpack_tags2(tags, &pt, !dev->param.no_tags_ecc);
-+ }
-+
-+ if (local_data)
-+ yaffs_release_temp_buffer(dev, data);
-+
-+ if (tags && ecc_result == YAFFS_ECC_RESULT_UNFIXED) {
-+ tags->ecc_result = YAFFS_ECC_RESULT_UNFIXED;
-+ dev->n_ecc_unfixed++;
-+ }
-+
-+ if (tags && ecc_result == -YAFFS_ECC_RESULT_FIXED) {
-+ if (tags->ecc_result <= YAFFS_ECC_RESULT_NO_ERROR)
-+ tags->ecc_result = YAFFS_ECC_RESULT_FIXED;
-+ dev->n_ecc_fixed++;
-+ }
-+
-+ if (ecc_result < YAFFS_ECC_RESULT_UNFIXED)
-+ return YAFFS_OK;
-+ else
-+ return YAFFS_FAIL;
-+}
-+
-+static int yaffs_tags_marshall_query_block(struct yaffs_dev *dev, int block_no,
-+ enum yaffs_block_state *state,
-+ u32 *seq_number)
-+{
-+ int retval;
-+
-+ yaffs_trace(YAFFS_TRACE_MTD, "yaffs_tags_marshall_query_block %d",
-+ block_no);
-+
-+ retval = dev->drv.drv_check_bad_fn(dev, block_no);
-+
-+ if (retval== YAFFS_FAIL) {
-+ yaffs_trace(YAFFS_TRACE_MTD, "block is bad");
-+
-+ *state = YAFFS_BLOCK_STATE_DEAD;
-+ *seq_number = 0;
-+ } else {
-+ struct yaffs_ext_tags t;
-+
-+ yaffs_tags_marshall_read(dev,
-+ block_no * dev->param.chunks_per_block,
-+ NULL, &t);
-+
-+ if (t.chunk_used) {
-+ *seq_number = t.seq_number;
-+ *state = YAFFS_BLOCK_STATE_NEEDS_SCAN;
-+ } else {
-+ *seq_number = 0;
-+ *state = YAFFS_BLOCK_STATE_EMPTY;
-+ }
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_MTD,
-+ "block query returns seq %d state %d",
-+ *seq_number, *state);
-+
-+ if (retval == 0)
-+ return YAFFS_OK;
-+ else
-+ return YAFFS_FAIL;
-+}
-+
-+static int yaffs_tags_marshall_mark_bad(struct yaffs_dev *dev, int block_no)
-+{
-+ return dev->drv.drv_mark_bad_fn(dev, block_no);
-+
-+}
-+
-+
-+void yaffs_tags_marshall_install(struct yaffs_dev *dev)
-+{
-+ if (!dev->param.is_yaffs2)
-+ return;
-+
-+ if (!dev->tagger.write_chunk_tags_fn)
-+ dev->tagger.write_chunk_tags_fn = yaffs_tags_marshall_write;
-+
-+ if (!dev->tagger.read_chunk_tags_fn)
-+ dev->tagger.read_chunk_tags_fn = yaffs_tags_marshall_read;
-+
-+ if (!dev->tagger.query_block_fn)
-+ dev->tagger.query_block_fn = yaffs_tags_marshall_query_block;
-+
-+ if (!dev->tagger.mark_bad_fn)
-+ dev->tagger.mark_bad_fn = yaffs_tags_marshall_mark_bad;
-+
-+}
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_tagsmarshall.h linux-3.12.20/fs/yaffs2/yaffs_tagsmarshall.h
---- linux-3.12.20.orig/fs/yaffs2/yaffs_tagsmarshall.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_tagsmarshall.h 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,22 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_TAGSMARSHALL_H__
-+#define __YAFFS_TAGSMARSHALL_H__
-+
-+#include "yaffs_guts.h"
-+void yaffs_tags_marshall_install(struct yaffs_dev *dev);
-+
-+#endif
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_trace.h linux-3.12.20/fs/yaffs2/yaffs_trace.h
---- linux-3.12.20.orig/fs/yaffs2/yaffs_trace.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_trace.h 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,57 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YTRACE_H__
-+#define __YTRACE_H__
-+
-+extern unsigned int yaffs_trace_mask;
-+extern unsigned int yaffs_wr_attempts;
-+
-+/*
-+ * Tracing flags.
-+ * The flags masked in YAFFS_TRACE_ALWAYS are always traced.
-+ */
-+
-+#define YAFFS_TRACE_OS 0x00000002
-+#define YAFFS_TRACE_ALLOCATE 0x00000004
-+#define YAFFS_TRACE_SCAN 0x00000008
-+#define YAFFS_TRACE_BAD_BLOCKS 0x00000010
-+#define YAFFS_TRACE_ERASE 0x00000020
-+#define YAFFS_TRACE_GC 0x00000040
-+#define YAFFS_TRACE_WRITE 0x00000080
-+#define YAFFS_TRACE_TRACING 0x00000100
-+#define YAFFS_TRACE_DELETION 0x00000200
-+#define YAFFS_TRACE_BUFFERS 0x00000400
-+#define YAFFS_TRACE_NANDACCESS 0x00000800
-+#define YAFFS_TRACE_GC_DETAIL 0x00001000
-+#define YAFFS_TRACE_SCAN_DEBUG 0x00002000
-+#define YAFFS_TRACE_MTD 0x00004000
-+#define YAFFS_TRACE_CHECKPOINT 0x00008000
-+
-+#define YAFFS_TRACE_VERIFY 0x00010000
-+#define YAFFS_TRACE_VERIFY_NAND 0x00020000
-+#define YAFFS_TRACE_VERIFY_FULL 0x00040000
-+#define YAFFS_TRACE_VERIFY_ALL 0x000f0000
-+
-+#define YAFFS_TRACE_SYNC 0x00100000
-+#define YAFFS_TRACE_BACKGROUND 0x00200000
-+#define YAFFS_TRACE_LOCK 0x00400000
-+#define YAFFS_TRACE_MOUNT 0x00800000
-+
-+#define YAFFS_TRACE_ERROR 0x40000000
-+#define YAFFS_TRACE_BUG 0x80000000
-+#define YAFFS_TRACE_ALWAYS 0xf0000000
-+
-+#endif
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_verify.c linux-3.12.20/fs/yaffs2/yaffs_verify.c
---- linux-3.12.20.orig/fs/yaffs2/yaffs_verify.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_verify.c 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,529 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_verify.h"
-+#include "yaffs_trace.h"
-+#include "yaffs_bitmap.h"
-+#include "yaffs_getblockinfo.h"
-+#include "yaffs_nand.h"
-+
-+int yaffs_skip_verification(struct yaffs_dev *dev)
-+{
-+ (void) dev;
-+ return !(yaffs_trace_mask &
-+ (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL));
-+}
-+
-+static int yaffs_skip_full_verification(struct yaffs_dev *dev)
-+{
-+ (void) dev;
-+ return !(yaffs_trace_mask & (YAFFS_TRACE_VERIFY_FULL));
-+}
-+
-+static int yaffs_skip_nand_verification(struct yaffs_dev *dev)
-+{
-+ (void) dev;
-+ return !(yaffs_trace_mask & (YAFFS_TRACE_VERIFY_NAND));
-+}
-+
-+static const char * const block_state_name[] = {
-+ "Unknown",
-+ "Needs scan",
-+ "Scanning",
-+ "Empty",
-+ "Allocating",
-+ "Full",
-+ "Dirty",
-+ "Checkpoint",
-+ "Collecting",
-+ "Dead"
-+};
-+
-+void yaffs_verify_blk(struct yaffs_dev *dev, struct yaffs_block_info *bi, int n)
-+{
-+ int actually_used;
-+ int in_use;
-+
-+ if (yaffs_skip_verification(dev))
-+ return;
-+
-+ /* Report illegal runtime states */
-+ if (bi->block_state >= YAFFS_NUMBER_OF_BLOCK_STATES)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Block %d has undefined state %d",
-+ n, bi->block_state);
-+
-+ switch (bi->block_state) {
-+ case YAFFS_BLOCK_STATE_UNKNOWN:
-+ case YAFFS_BLOCK_STATE_SCANNING:
-+ case YAFFS_BLOCK_STATE_NEEDS_SCAN:
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Block %d has bad run-state %s",
-+ n, block_state_name[bi->block_state]);
-+ }
-+
-+ /* Check pages in use and soft deletions are legal */
-+
-+ actually_used = bi->pages_in_use - bi->soft_del_pages;
-+
-+ if (bi->pages_in_use < 0 ||
-+ bi->pages_in_use > dev->param.chunks_per_block ||
-+ bi->soft_del_pages < 0 ||
-+ bi->soft_del_pages > dev->param.chunks_per_block ||
-+ actually_used < 0 || actually_used > dev->param.chunks_per_block)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Block %d has illegal values pages_in_used %d soft_del_pages %d",
-+ n, bi->pages_in_use, bi->soft_del_pages);
-+
-+ /* Check chunk bitmap legal */
-+ in_use = yaffs_count_chunk_bits(dev, n);
-+ if (in_use != bi->pages_in_use)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Block %d has inconsistent values pages_in_use %d counted chunk bits %d",
-+ n, bi->pages_in_use, in_use);
-+}
-+
-+void yaffs_verify_collected_blk(struct yaffs_dev *dev,
-+ struct yaffs_block_info *bi, int n)
-+{
-+ yaffs_verify_blk(dev, bi, n);
-+
-+ /* After collection the block should be in the erased state */
-+
-+ if (bi->block_state != YAFFS_BLOCK_STATE_COLLECTING &&
-+ bi->block_state != YAFFS_BLOCK_STATE_EMPTY) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "Block %d is in state %d after gc, should be erased",
-+ n, bi->block_state);
-+ }
-+}
-+
-+void yaffs_verify_blocks(struct yaffs_dev *dev)
-+{
-+ int i;
-+ int state_count[YAFFS_NUMBER_OF_BLOCK_STATES];
-+ int illegal_states = 0;
-+
-+ if (yaffs_skip_verification(dev))
-+ return;
-+
-+ memset(state_count, 0, sizeof(state_count));
-+
-+ for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, i);
-+ yaffs_verify_blk(dev, bi, i);
-+
-+ if (bi->block_state < YAFFS_NUMBER_OF_BLOCK_STATES)
-+ state_count[bi->block_state]++;
-+ else
-+ illegal_states++;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_VERIFY, "Block summary");
-+
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "%d blocks have illegal states",
-+ illegal_states);
-+ if (state_count[YAFFS_BLOCK_STATE_ALLOCATING] > 1)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Too many allocating blocks");
-+
-+ for (i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "%s %d blocks",
-+ block_state_name[i], state_count[i]);
-+
-+ if (dev->blocks_in_checkpt != state_count[YAFFS_BLOCK_STATE_CHECKPOINT])
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Checkpoint block count wrong dev %d count %d",
-+ dev->blocks_in_checkpt,
-+ state_count[YAFFS_BLOCK_STATE_CHECKPOINT]);
-+
-+ if (dev->n_erased_blocks != state_count[YAFFS_BLOCK_STATE_EMPTY])
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Erased block count wrong dev %d count %d",
-+ dev->n_erased_blocks,
-+ state_count[YAFFS_BLOCK_STATE_EMPTY]);
-+
-+ if (state_count[YAFFS_BLOCK_STATE_COLLECTING] > 1)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Too many collecting blocks %d (max is 1)",
-+ state_count[YAFFS_BLOCK_STATE_COLLECTING]);
-+}
-+
-+/*
-+ * Verify the object header. oh must be valid, but obj and tags may be NULL in
-+ * which case those tests will not be performed.
-+ */
-+void yaffs_verify_oh(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh,
-+ struct yaffs_ext_tags *tags, int parent_check)
-+{
-+ if (obj && yaffs_skip_verification(obj->my_dev))
-+ return;
-+
-+ if (!(tags && obj && oh)) {
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Verifying object header tags %p obj %p oh %p",
-+ tags, obj, oh);
-+ return;
-+ }
-+
-+ if (oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN ||
-+ oh->type > YAFFS_OBJECT_TYPE_MAX)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d header type is illegal value 0x%x",
-+ tags->obj_id, oh->type);
-+
-+ if (tags->obj_id != obj->obj_id)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d header mismatch obj_id %d",
-+ tags->obj_id, obj->obj_id);
-+
-+ /*
-+ * Check that the object's parent ids match if parent_check requested.
-+ *
-+ * Tests do not apply to the root object.
-+ */
-+
-+ if (parent_check && tags->obj_id > 1 && !obj->parent)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d header mismatch parent_id %d obj->parent is NULL",
-+ tags->obj_id, oh->parent_obj_id);
-+
-+ if (parent_check && obj->parent &&
-+ oh->parent_obj_id != obj->parent->obj_id &&
-+ (oh->parent_obj_id != YAFFS_OBJECTID_UNLINKED ||
-+ obj->parent->obj_id != YAFFS_OBJECTID_DELETED))
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d header mismatch parent_id %d parent_obj_id %d",
-+ tags->obj_id, oh->parent_obj_id,
-+ obj->parent->obj_id);
-+
-+ if (tags->obj_id > 1 && oh->name[0] == 0) /* Null name */
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d header name is NULL",
-+ obj->obj_id);
-+
-+ if (tags->obj_id > 1 && ((u8) (oh->name[0])) == 0xff) /* Junk name */
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d header name is 0xff",
-+ obj->obj_id);
-+}
-+
-+void yaffs_verify_file(struct yaffs_obj *obj)
-+{
-+ u32 x;
-+ int required_depth;
-+ int actual_depth;
-+ int last_chunk;
-+ u32 offset_in_chunk;
-+ u32 the_chunk;
-+
-+ u32 i;
-+ struct yaffs_dev *dev;
-+ struct yaffs_ext_tags tags;
-+ struct yaffs_tnode *tn;
-+ u32 obj_id;
-+
-+ if (!obj)
-+ return;
-+
-+ if (yaffs_skip_verification(obj->my_dev))
-+ return;
-+
-+ dev = obj->my_dev;
-+ obj_id = obj->obj_id;
-+
-+
-+ /* Check file size is consistent with tnode depth */
-+ yaffs_addr_to_chunk(dev, obj->variant.file_variant.file_size,
-+ &last_chunk, &offset_in_chunk);
-+ last_chunk++;
-+ x = last_chunk >> YAFFS_TNODES_LEVEL0_BITS;
-+ required_depth = 0;
-+ while (x > 0) {
-+ x >>= YAFFS_TNODES_INTERNAL_BITS;
-+ required_depth++;
-+ }
-+
-+ actual_depth = obj->variant.file_variant.top_level;
-+
-+ /* Check that the chunks in the tnode tree are all correct.
-+ * We do this by scanning through the tnode tree and
-+ * checking the tags for every chunk match.
-+ */
-+
-+ if (yaffs_skip_nand_verification(dev))
-+ return;
-+
-+ for (i = 1; i <= last_chunk; i++) {
-+ tn = yaffs_find_tnode_0(dev, &obj->variant.file_variant, i);
-+
-+ if (!tn)
-+ continue;
-+
-+ the_chunk = yaffs_get_group_base(dev, tn, i);
-+ if (the_chunk > 0) {
-+ yaffs_rd_chunk_tags_nand(dev, the_chunk, NULL,
-+ &tags);
-+ if (tags.obj_id != obj_id || tags.chunk_id != i)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Object %d chunk_id %d NAND mismatch chunk %d tags (%d:%d)",
-+ obj_id, i, the_chunk,
-+ tags.obj_id, tags.chunk_id);
-+ }
-+ }
-+}
-+
-+void yaffs_verify_link(struct yaffs_obj *obj)
-+{
-+ if (obj && yaffs_skip_verification(obj->my_dev))
-+ return;
-+
-+ /* Verify sane equivalent object */
-+}
-+
-+void yaffs_verify_symlink(struct yaffs_obj *obj)
-+{
-+ if (obj && yaffs_skip_verification(obj->my_dev))
-+ return;
-+
-+ /* Verify symlink string */
-+}
-+
-+void yaffs_verify_special(struct yaffs_obj *obj)
-+{
-+ if (obj && yaffs_skip_verification(obj->my_dev))
-+ return;
-+}
-+
-+void yaffs_verify_obj(struct yaffs_obj *obj)
-+{
-+ struct yaffs_dev *dev;
-+ u32 chunk_min;
-+ u32 chunk_max;
-+ u32 chunk_id_ok;
-+ u32 chunk_in_range;
-+ u32 chunk_wrongly_deleted;
-+ u32 chunk_valid;
-+
-+ if (!obj)
-+ return;
-+
-+ if (obj->being_created)
-+ return;
-+
-+ dev = obj->my_dev;
-+
-+ if (yaffs_skip_verification(dev))
-+ return;
-+
-+ /* Check sane object header chunk */
-+
-+ chunk_min = dev->internal_start_block * dev->param.chunks_per_block;
-+ chunk_max =
-+ (dev->internal_end_block + 1) * dev->param.chunks_per_block - 1;
-+
-+ chunk_in_range = (((unsigned)(obj->hdr_chunk)) >= chunk_min &&
-+ ((unsigned)(obj->hdr_chunk)) <= chunk_max);
-+ chunk_id_ok = chunk_in_range || (obj->hdr_chunk == 0);
-+ chunk_valid = chunk_in_range &&
-+ yaffs_check_chunk_bit(dev,
-+ obj->hdr_chunk / dev->param.chunks_per_block,
-+ obj->hdr_chunk % dev->param.chunks_per_block);
-+ chunk_wrongly_deleted = chunk_in_range && !chunk_valid;
-+
-+ if (!obj->fake && (!chunk_id_ok || chunk_wrongly_deleted))
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d has chunk_id %d %s %s",
-+ obj->obj_id, obj->hdr_chunk,
-+ chunk_id_ok ? "" : ",out of range",
-+ chunk_wrongly_deleted ? ",marked as deleted" : "");
-+
-+ if (chunk_valid && !yaffs_skip_nand_verification(dev)) {
-+ struct yaffs_ext_tags tags;
-+ struct yaffs_obj_hdr *oh;
-+ u8 *buffer = yaffs_get_temp_buffer(dev);
-+
-+ oh = (struct yaffs_obj_hdr *)buffer;
-+
-+ yaffs_rd_chunk_tags_nand(dev, obj->hdr_chunk, buffer, &tags);
-+
-+ yaffs_verify_oh(obj, oh, &tags, 1);
-+
-+ yaffs_release_temp_buffer(dev, buffer);
-+ }
-+
-+ /* Verify it has a parent */
-+ if (obj && !obj->fake && (!obj->parent || obj->parent->my_dev != dev)) {
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d has parent pointer %p which does not look like an object",
-+ obj->obj_id, obj->parent);
-+ }
-+
-+ /* Verify parent is a directory */
-+ if (obj->parent &&
-+ obj->parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d's parent is not a directory (type %d)",
-+ obj->obj_id, obj->parent->variant_type);
-+ }
-+
-+ switch (obj->variant_type) {
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ yaffs_verify_file(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ yaffs_verify_symlink(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ yaffs_verify_dir(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ yaffs_verify_link(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ yaffs_verify_special(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ default:
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d has illegaltype %d",
-+ obj->obj_id, obj->variant_type);
-+ break;
-+ }
-+}
-+
-+void yaffs_verify_objects(struct yaffs_dev *dev)
-+{
-+ struct yaffs_obj *obj;
-+ int i;
-+ struct list_head *lh;
-+
-+ if (yaffs_skip_verification(dev))
-+ return;
-+
-+ /* Iterate through the objects in each hash entry */
-+
-+ for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
-+ list_for_each(lh, &dev->obj_bucket[i].list) {
-+ obj = list_entry(lh, struct yaffs_obj, hash_link);
-+ yaffs_verify_obj(obj);
-+ }
-+ }
-+}
-+
-+void yaffs_verify_obj_in_dir(struct yaffs_obj *obj)
-+{
-+ struct list_head *lh;
-+ struct yaffs_obj *list_obj;
-+ int count = 0;
-+
-+ if (!obj) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "No object to verify");
-+ BUG();
-+ return;
-+ }
-+
-+ if (yaffs_skip_verification(obj->my_dev))
-+ return;
-+
-+ if (!obj->parent) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "Object does not have parent");
-+ BUG();
-+ return;
-+ }
-+
-+ if (obj->parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "Parent is not directory");
-+ BUG();
-+ }
-+
-+ /* Iterate through the objects in each hash entry */
-+
-+ list_for_each(lh, &obj->parent->variant.dir_variant.children) {
-+ list_obj = list_entry(lh, struct yaffs_obj, siblings);
-+ yaffs_verify_obj(list_obj);
-+ if (obj == list_obj)
-+ count++;
-+ }
-+
-+ if (count != 1) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "Object in directory %d times",
-+ count);
-+ BUG();
-+ }
-+}
-+
-+void yaffs_verify_dir(struct yaffs_obj *directory)
-+{
-+ struct list_head *lh;
-+ struct yaffs_obj *list_obj;
-+
-+ if (!directory) {
-+ BUG();
-+ return;
-+ }
-+
-+ if (yaffs_skip_full_verification(directory->my_dev))
-+ return;
-+
-+ if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "Directory has wrong type: %d",
-+ directory->variant_type);
-+ BUG();
-+ }
-+
-+ /* Iterate through the objects in each hash entry */
-+
-+ list_for_each(lh, &directory->variant.dir_variant.children) {
-+ list_obj = list_entry(lh, struct yaffs_obj, siblings);
-+ if (list_obj->parent != directory) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "Object in directory list has wrong parent %p",
-+ list_obj->parent);
-+ BUG();
-+ }
-+ yaffs_verify_obj_in_dir(list_obj);
-+ }
-+}
-+
-+static int yaffs_free_verification_failures;
-+
-+void yaffs_verify_free_chunks(struct yaffs_dev *dev)
-+{
-+ int counted;
-+ int difference;
-+
-+ if (yaffs_skip_verification(dev))
-+ return;
-+
-+ counted = yaffs_count_free_chunks(dev);
-+
-+ difference = dev->n_free_chunks - counted;
-+
-+ if (difference) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "Freechunks verification failure %d %d %d",
-+ dev->n_free_chunks, counted, difference);
-+ yaffs_free_verification_failures++;
-+ }
-+}
-+
-+int yaffs_verify_file_sane(struct yaffs_obj *in)
-+{
-+ (void) in;
-+ return YAFFS_OK;
-+}
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_verify.h linux-3.12.20/fs/yaffs2/yaffs_verify.h
---- linux-3.12.20.orig/fs/yaffs2/yaffs_verify.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_verify.h 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,43 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_VERIFY_H__
-+#define __YAFFS_VERIFY_H__
-+
-+#include "yaffs_guts.h"
-+
-+void yaffs_verify_blk(struct yaffs_dev *dev, struct yaffs_block_info *bi,
-+ int n);
-+void yaffs_verify_collected_blk(struct yaffs_dev *dev,
-+ struct yaffs_block_info *bi, int n);
-+void yaffs_verify_blocks(struct yaffs_dev *dev);
-+
-+void yaffs_verify_oh(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh,
-+ struct yaffs_ext_tags *tags, int parent_check);
-+void yaffs_verify_file(struct yaffs_obj *obj);
-+void yaffs_verify_link(struct yaffs_obj *obj);
-+void yaffs_verify_symlink(struct yaffs_obj *obj);
-+void yaffs_verify_special(struct yaffs_obj *obj);
-+void yaffs_verify_obj(struct yaffs_obj *obj);
-+void yaffs_verify_objects(struct yaffs_dev *dev);
-+void yaffs_verify_obj_in_dir(struct yaffs_obj *obj);
-+void yaffs_verify_dir(struct yaffs_obj *directory);
-+void yaffs_verify_free_chunks(struct yaffs_dev *dev);
-+
-+int yaffs_verify_file_sane(struct yaffs_obj *obj);
-+
-+int yaffs_skip_verification(struct yaffs_dev *dev);
-+
-+#endif
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_vfs.c linux-3.12.20/fs/yaffs2/yaffs_vfs.c
---- linux-3.12.20.orig/fs/yaffs2/yaffs_vfs.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_vfs.c 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,3600 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ * Acknowledgements:
-+ * Luc van OostenRyck for numerous patches.
-+ * Nick Bane for numerous patches.
-+ * Nick Bane for 2.5/2.6 integration.
-+ * Andras Toth for mknod rdev issue.
-+ * Michael Fischer for finding the problem with inode inconsistency.
-+ * Some code bodily lifted from JFFS
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+/*
-+ *
-+ * This is the file system front-end to YAFFS that hooks it up to
-+ * the VFS.
-+ *
-+ * Special notes:
-+ * >> 2.4: sb->u.generic_sbp points to the struct yaffs_dev associated with
-+ * this superblock
-+ * >> 2.6: sb->s_fs_info points to the struct yaffs_dev associated with this
-+ * superblock
-+ * >> inode->u.generic_ip points to the associated struct yaffs_obj.
-+ */
-+
-+/*
-+ * There are two variants of the VFS glue code. This variant should compile
-+ * for any version of Linux.
-+ */
-+#include <linux/version.h>
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 10))
-+#define YAFFS_COMPILE_BACKGROUND
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23))
-+#define YAFFS_COMPILE_FREEZER
-+#endif
-+#endif
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28))
-+#define YAFFS_COMPILE_EXPORTFS
-+#endif
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 35))
-+#define YAFFS_USE_SETATTR_COPY
-+#define YAFFS_USE_TRUNCATE_SETSIZE
-+#endif
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 35))
-+#define YAFFS_HAS_EVICT_INODE
-+#endif
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
-+#define YAFFS_NEW_FOLLOW_LINK 1
-+#else
-+#define YAFFS_NEW_FOLLOW_LINK 0
-+#endif
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 6, 0))
-+#define YAFFS_HAS_WRITE_SUPER
-+#endif
-+
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
-+#include <linux/config.h>
-+#endif
-+
-+#include <linux/kernel.h>
-+#include <linux/module.h>
-+#include <linux/slab.h>
-+#include <linux/init.h>
-+#include <linux/fs.h>
-+#include <linux/proc_fs.h>
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 39))
-+#include <linux/smp_lock.h>
-+#endif
-+#include <linux/pagemap.h>
-+#include <linux/mtd/mtd.h>
-+#include <linux/interrupt.h>
-+#include <linux/string.h>
-+#include <linux/ctype.h>
-+
-+#if (YAFFS_NEW_FOLLOW_LINK == 1)
-+#include <linux/namei.h>
-+#endif
-+
-+#ifdef YAFFS_COMPILE_EXPORTFS
-+#include <linux/exportfs.h>
-+#endif
-+
-+#ifdef YAFFS_COMPILE_BACKGROUND
-+#include <linux/kthread.h>
-+#include <linux/delay.h>
-+#endif
-+#ifdef YAFFS_COMPILE_FREEZER
-+#include <linux/freezer.h>
-+#endif
-+
-+#include <asm/div64.h>
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+
-+#include <linux/statfs.h>
-+
-+#define UnlockPage(p) unlock_page(p)
-+#define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags)
-+
-+/* FIXME: use sb->s_id instead ? */
-+#define yaffs_devname(sb, buf) bdevname(sb->s_bdev, buf)
-+
-+#else
-+
-+#include <linux/locks.h>
-+#define BDEVNAME_SIZE 0
-+#define yaffs_devname(sb, buf) kdevname(sb->s_dev)
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0))
-+/* added NCB 26/5/2006 for 2.4.25-vrs2-tcl1 kernel */
-+#define __user
-+#endif
-+
-+#endif
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26))
-+#define YPROC_ROOT (&proc_root)
-+#else
-+#define YPROC_ROOT NULL
-+#endif
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26))
-+#define Y_INIT_TIMER(a) init_timer(a)
-+#else
-+#define Y_INIT_TIMER(a) init_timer_on_stack(a)
-+#endif
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 27))
-+#define YAFFS_USE_WRITE_BEGIN_END 1
-+#else
-+#define YAFFS_USE_WRITE_BEGIN_END 0
-+#endif
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 6, 0))
-+#define YAFFS_SUPER_HAS_DIRTY
-+#endif
-+
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 2, 0))
-+#define set_nlink(inode, count) do { (inode)->i_nlink = (count); } while(0)
-+#endif
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28))
-+static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size)
-+{
-+ uint64_t result = partition_size;
-+ do_div(result, block_size);
-+ return (uint32_t) result;
-+}
-+#else
-+#define YCALCBLOCKS(s, b) ((s)/(b))
-+#endif
-+
-+#include <linux/uaccess.h>
-+#include <linux/mtd/mtd.h>
-+
-+#include "yportenv.h"
-+#include "yaffs_trace.h"
-+#include "yaffs_guts.h"
-+#include "yaffs_attribs.h"
-+
-+#include "yaffs_linux.h"
-+
-+#include "yaffs_mtdif.h"
-+#include "yaffs_packedtags2.h"
-+#include "yaffs_getblockinfo.h"
-+
-+unsigned int yaffs_trace_mask =
-+ YAFFS_TRACE_BAD_BLOCKS |
-+ YAFFS_TRACE_ALWAYS |
-+ 0;
-+
-+unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS;
-+unsigned int yaffs_auto_checkpoint = 1;
-+unsigned int yaffs_gc_control = 1;
-+unsigned int yaffs_bg_enable = 1;
-+unsigned int yaffs_auto_select = 1;
-+/* Module Parameters */
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+module_param(yaffs_trace_mask, uint, 0644);
-+module_param(yaffs_wr_attempts, uint, 0644);
-+module_param(yaffs_auto_checkpoint, uint, 0644);
-+module_param(yaffs_gc_control, uint, 0644);
-+module_param(yaffs_bg_enable, uint, 0644);
-+#else
-+MODULE_PARM(yaffs_trace_mask, "i");
-+MODULE_PARM(yaffs_wr_attempts, "i");
-+MODULE_PARM(yaffs_auto_checkpoint, "i");
-+MODULE_PARM(yaffs_gc_control, "i");
-+#endif
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
-+/* use iget and read_inode */
-+#define Y_IGET(sb, inum) iget((sb), (inum))
-+
-+#else
-+/* Call local equivalent */
-+#define YAFFS_USE_OWN_IGET
-+#define Y_IGET(sb, inum) yaffs_iget((sb), (inum))
-+
-+#endif
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
-+#define yaffs_inode_to_obj_lv(iptr) ((iptr)->i_private)
-+#else
-+#define yaffs_inode_to_obj_lv(iptr) ((iptr)->u.generic_ip)
-+#endif
-+
-+#define yaffs_inode_to_obj(iptr) \
-+ ((struct yaffs_obj *)(yaffs_inode_to_obj_lv(iptr)))
-+#define yaffs_dentry_to_obj(dptr) yaffs_inode_to_obj((dptr)->d_inode)
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+#define yaffs_super_to_dev(sb) ((struct yaffs_dev *)sb->s_fs_info)
-+#else
-+#define yaffs_super_to_dev(sb) ((struct yaffs_dev *)sb->u.generic_sbp)
-+#endif
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0))
-+#define Y_CLEAR_INODE(i) clear_inode(i)
-+#else
-+#define Y_CLEAR_INODE(i) end_writeback(i)
-+#endif
-+
-+
-+#define update_dir_time(dir) do {\
-+ (dir)->i_ctime = (dir)->i_mtime = CURRENT_TIME; \
-+ } while (0)
-+
-+static void yaffs_fill_inode_from_obj(struct inode *inode,
-+ struct yaffs_obj *obj);
-+
-+
-+static void yaffs_gross_lock(struct yaffs_dev *dev)
-+{
-+ yaffs_trace(YAFFS_TRACE_LOCK, "yaffs locking %p", current);
-+ mutex_lock(&(yaffs_dev_to_lc(dev)->gross_lock));
-+ yaffs_trace(YAFFS_TRACE_LOCK, "yaffs locked %p", current);
-+}
-+
-+static void yaffs_gross_unlock(struct yaffs_dev *dev)
-+{
-+ yaffs_trace(YAFFS_TRACE_LOCK, "yaffs unlocking %p", current);
-+ mutex_unlock(&(yaffs_dev_to_lc(dev)->gross_lock));
-+}
-+
-+
-+static int yaffs_readpage_nolock(struct file *f, struct page *pg)
-+{
-+ /* Lifted from jffs2 */
-+
-+ struct yaffs_obj *obj;
-+ unsigned char *pg_buf;
-+ int ret;
-+ loff_t pos = ((loff_t) pg->index) << PAGE_CACHE_SHIFT;
-+ struct yaffs_dev *dev;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readpage_nolock at %lld, size %08x",
-+ (long long)pos,
-+ (unsigned)PAGE_CACHE_SIZE);
-+
-+ obj = yaffs_dentry_to_obj(f->f_dentry);
-+
-+ dev = obj->my_dev;
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+ BUG_ON(!PageLocked(pg));
-+#else
-+ if (!PageLocked(pg))
-+ PAGE_BUG(pg);
-+#endif
-+
-+ pg_buf = kmap(pg);
-+ /* FIXME: Can kmap fail? */
-+
-+ yaffs_gross_lock(dev);
-+
-+ ret = yaffs_file_rd(obj, pg_buf, pos, PAGE_CACHE_SIZE);
-+
-+ yaffs_gross_unlock(dev);
-+
-+ if (ret >= 0)
-+ ret = 0;
-+
-+ if (ret) {
-+ ClearPageUptodate(pg);
-+ SetPageError(pg);
-+ } else {
-+ SetPageUptodate(pg);
-+ ClearPageError(pg);
-+ }
-+
-+ flush_dcache_page(pg);
-+ kunmap(pg);
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage_nolock done");
-+ return ret;
-+}
-+
-+static int yaffs_readpage_unlock(struct file *f, struct page *pg)
-+{
-+ int ret = yaffs_readpage_nolock(f, pg);
-+ UnlockPage(pg);
-+ return ret;
-+}
-+
-+static int yaffs_readpage(struct file *f, struct page *pg)
-+{
-+ int ret;
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage");
-+ ret = yaffs_readpage_unlock(f, pg);
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage done");
-+ return ret;
-+}
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0))
-+#define YCRED_FSUID() from_kuid(&init_user_ns, current_fsuid())
-+#define YCRED_FSGID() from_kgid(&init_user_ns, current_fsgid())
-+#else
-+#define YCRED_FSUID() YCRED(current)->fsuid
-+#define YCRED_FSGID() YCRED(current)->fsgid
-+
-+static inline uid_t i_uid_read(const struct inode *inode)
-+{
-+ return inode->i_uid;
-+}
-+
-+static inline gid_t i_gid_read(const struct inode *inode)
-+{
-+ return inode->i_gid;
-+}
-+
-+static inline void i_uid_write(struct inode *inode, uid_t uid)
-+{
-+ inode->i_uid = uid;
-+}
-+
-+static inline void i_gid_write(struct inode *inode, gid_t gid)
-+{
-+ inode->i_gid = gid;
-+}
-+#endif
-+
-+static void yaffs_set_super_dirty_val(struct yaffs_dev *dev, int val)
-+{
-+ struct yaffs_linux_context *lc = yaffs_dev_to_lc(dev);
-+
-+ if (lc)
-+ lc->dirty = val;
-+
-+# ifdef YAFFS_SUPER_HAS_DIRTY
-+ {
-+ struct super_block *sb = lc->super;
-+
-+ if (sb)
-+ sb->s_dirt = val;
-+ }
-+#endif
-+
-+}
-+
-+static void yaffs_set_super_dirty(struct yaffs_dev *dev)
-+{
-+ yaffs_set_super_dirty_val(dev, 1);
-+}
-+
-+static void yaffs_clear_super_dirty(struct yaffs_dev *dev)
-+{
-+ yaffs_set_super_dirty_val(dev, 0);
-+}
-+
-+static int yaffs_check_super_dirty(struct yaffs_dev *dev)
-+{
-+ struct yaffs_linux_context *lc = yaffs_dev_to_lc(dev);
-+
-+ if (lc && lc->dirty)
-+ return 1;
-+
-+# ifdef YAFFS_SUPER_HAS_DIRTY
-+ {
-+ struct super_block *sb = lc->super;
-+
-+ if (sb && sb->s_dirt)
-+ return 1;
-+ }
-+#endif
-+ return 0;
-+
-+}
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
-+#else
-+static int yaffs_writepage(struct page *page)
-+#endif
-+{
-+ struct yaffs_dev *dev;
-+ struct address_space *mapping = page->mapping;
-+ struct inode *inode;
-+ unsigned long end_index;
-+ char *buffer;
-+ struct yaffs_obj *obj;
-+ int n_written = 0;
-+ unsigned n_bytes;
-+ loff_t i_size;
-+
-+ if (!mapping)
-+ BUG();
-+ inode = mapping->host;
-+ if (!inode)
-+ BUG();
-+ i_size = i_size_read(inode);
-+
-+ end_index = i_size >> PAGE_CACHE_SHIFT;
-+
-+ if (page->index < end_index)
-+ n_bytes = PAGE_CACHE_SIZE;
-+ else {
-+ n_bytes = i_size & (PAGE_CACHE_SIZE - 1);
-+
-+ if (page->index > end_index || !n_bytes) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_writepage at %lld, inode size = %lld!!",
-+ ((loff_t)page->index) << PAGE_CACHE_SHIFT,
-+ inode->i_size);
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ " -> don't care!!");
-+
-+ zero_user_segment(page, 0, PAGE_CACHE_SIZE);
-+ set_page_writeback(page);
-+ unlock_page(page);
-+ end_page_writeback(page);
-+ return 0;
-+ }
-+ }
-+
-+ if (n_bytes != PAGE_CACHE_SIZE)
-+ zero_user_segment(page, n_bytes, PAGE_CACHE_SIZE);
-+
-+ get_page(page);
-+
-+ buffer = kmap(page);
-+
-+ obj = yaffs_inode_to_obj(inode);
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_writepage at %lld, size %08x",
-+ ((loff_t)page->index) << PAGE_CACHE_SHIFT, n_bytes);
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "writepag0: obj = %lld, ino = %lld",
-+ obj->variant.file_variant.file_size, inode->i_size);
-+
-+ n_written = yaffs_wr_file(obj, buffer,
-+ ((loff_t)page->index) << PAGE_CACHE_SHIFT, n_bytes, 0);
-+
-+ yaffs_set_super_dirty(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "writepag1: obj = %lld, ino = %lld",
-+ obj->variant.file_variant.file_size, inode->i_size);
-+
-+ yaffs_gross_unlock(dev);
-+
-+ kunmap(page);
-+ set_page_writeback(page);
-+ unlock_page(page);
-+ end_page_writeback(page);
-+ put_page(page);
-+
-+ return (n_written == n_bytes) ? 0 : -ENOSPC;
-+}
-+
-+/* Space holding and freeing is done to ensure we have space available for write_begin/end */
-+/* For now we just assume few parallel writes and check against a small number. */
-+/* Todo: need to do this with a counter to handle parallel reads better */
-+
-+static ssize_t yaffs_hold_space(struct file *f)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev;
-+
-+ int n_free_chunks;
-+
-+ obj = yaffs_dentry_to_obj(f->f_dentry);
-+
-+ dev = obj->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ n_free_chunks = yaffs_get_n_free_chunks(dev);
-+
-+ yaffs_gross_unlock(dev);
-+
-+ return (n_free_chunks > 20) ? 1 : 0;
-+}
-+
-+static void yaffs_release_space(struct file *f)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev;
-+
-+ obj = yaffs_dentry_to_obj(f->f_dentry);
-+
-+ dev = obj->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ yaffs_gross_unlock(dev);
-+}
-+
-+#if (YAFFS_USE_WRITE_BEGIN_END > 0)
-+static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
-+ loff_t pos, unsigned len, unsigned flags,
-+ struct page **pagep, void **fsdata)
-+{
-+ struct page *pg = NULL;
-+ pgoff_t index = pos >> PAGE_CACHE_SHIFT;
-+
-+ int ret = 0;
-+ int space_held = 0;
-+
-+ /* Get a page */
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
-+ pg = grab_cache_page_write_begin(mapping, index, flags);
-+#else
-+ pg = __grab_cache_page(mapping, index);
-+#endif
-+
-+ *pagep = pg;
-+ if (!pg) {
-+ ret = -ENOMEM;
-+ goto out;
-+ }
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "start yaffs_write_begin index %d(%x) uptodate %d",
-+ (int)index, (int)index, Page_Uptodate(pg) ? 1 : 0);
-+
-+ /* Get fs space */
-+ space_held = yaffs_hold_space(filp);
-+
-+ if (!space_held) {
-+ ret = -ENOSPC;
-+ goto out;
-+ }
-+
-+ /* Update page if required */
-+
-+ if (!Page_Uptodate(pg))
-+ ret = yaffs_readpage_nolock(filp, pg);
-+
-+ if (ret)
-+ goto out;
-+
-+ /* Happy path return */
-+ yaffs_trace(YAFFS_TRACE_OS, "end yaffs_write_begin - ok");
-+
-+ return 0;
-+
-+out:
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "end yaffs_write_begin fail returning %d", ret);
-+ if (space_held)
-+ yaffs_release_space(filp);
-+ if (pg) {
-+ unlock_page(pg);
-+ page_cache_release(pg);
-+ }
-+ return ret;
-+}
-+
-+#else
-+
-+static int yaffs_prepare_write(struct file *f, struct page *pg,
-+ unsigned offset, unsigned to)
-+{
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_prepair_write");
-+
-+ if (!Page_Uptodate(pg))
-+ return yaffs_readpage_nolock(f, pg);
-+ return 0;
-+}
-+#endif
-+
-+
-+static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
-+ loff_t * pos)
-+{
-+ struct yaffs_obj *obj;
-+ int n_written;
-+ loff_t ipos;
-+ struct inode *inode;
-+ struct yaffs_dev *dev;
-+
-+ obj = yaffs_dentry_to_obj(f->f_dentry);
-+
-+ if (!obj) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_file_write: hey obj is null!");
-+ return -EINVAL;
-+ }
-+
-+ dev = obj->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ inode = f->f_dentry->d_inode;
-+
-+ if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND)
-+ ipos = inode->i_size;
-+ else
-+ ipos = *pos;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_file_write about to write writing %u(%x) bytes to object %d at %lld",
-+ (unsigned)n, (unsigned)n, obj->obj_id, ipos);
-+
-+ n_written = yaffs_wr_file(obj, buf, ipos, n, 0);
-+
-+ yaffs_set_super_dirty(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_file_write: %d(%x) bytes written",
-+ (unsigned)n, (unsigned)n);
-+
-+ if (n_written > 0) {
-+ ipos += n_written;
-+ *pos = ipos;
-+ if (ipos > inode->i_size) {
-+ inode->i_size = ipos;
-+ inode->i_blocks = (ipos + 511) >> 9;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_file_write size updated to %lld bytes, %d blocks",
-+ ipos, (int)(inode->i_blocks));
-+ }
-+
-+ }
-+ yaffs_gross_unlock(dev);
-+ return (n_written == 0) && (n > 0) ? -ENOSPC : n_written;
-+}
-+
-+
-+#if (YAFFS_USE_WRITE_BEGIN_END > 0)
-+static int yaffs_write_end(struct file *filp, struct address_space *mapping,
-+ loff_t pos, unsigned len, unsigned copied,
-+ struct page *pg, void *fsdadata)
-+{
-+ int ret = 0;
-+ void *addr, *kva;
-+ uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1);
-+
-+ kva = kmap(pg);
-+ addr = kva + offset_into_page;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_write_end addr %p pos %lld n_bytes %d",
-+ addr, pos, copied);
-+
-+ ret = yaffs_file_write(filp, addr, copied, &pos);
-+
-+ if (ret != copied) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_write_end not same size ret %d copied %d",
-+ ret, copied);
-+ SetPageError(pg);
-+ }
-+
-+ kunmap(pg);
-+
-+ yaffs_release_space(filp);
-+ unlock_page(pg);
-+ page_cache_release(pg);
-+ return ret;
-+}
-+#else
-+
-+static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
-+ unsigned to)
-+{
-+ void *addr, *kva;
-+
-+ loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset;
-+ int n_bytes = to - offset;
-+ int n_written;
-+
-+ kva = kmap(pg);
-+ addr = kva + offset;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_commit_write addr %p pos %lld n_bytes %d",
-+ addr, pos, n_bytes);
-+
-+ n_written = yaffs_file_write(f, addr, n_bytes, &pos);
-+
-+ if (n_written != n_bytes) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_commit_write not same size n_written %d n_bytes %d",
-+ n_written, n_bytes);
-+ SetPageError(pg);
-+ }
-+ kunmap(pg);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_commit_write returning %d",
-+ n_written == n_bytes ? 0 : n_written);
-+
-+ return n_written == n_bytes ? 0 : n_written;
-+}
-+#endif
-+
-+static struct address_space_operations yaffs_file_address_operations = {
-+ .readpage = yaffs_readpage,
-+ .writepage = yaffs_writepage,
-+#if (YAFFS_USE_WRITE_BEGIN_END > 0)
-+ .write_begin = yaffs_write_begin,
-+ .write_end = yaffs_write_end,
-+#else
-+ .prepare_write = yaffs_prepare_write,
-+ .commit_write = yaffs_commit_write,
-+#endif
-+};
-+
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-+static int yaffs_file_flush(struct file *file, fl_owner_t id)
-+#else
-+static int yaffs_file_flush(struct file *file)
-+#endif
-+{
-+ struct yaffs_obj *obj = yaffs_dentry_to_obj(file->f_dentry);
-+
-+ struct yaffs_dev *dev = obj->my_dev;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_file_flush object %d (%s)",
-+ obj->obj_id,
-+ obj->dirty ? "dirty" : "clean");
-+
-+ yaffs_gross_lock(dev);
-+
-+ yaffs_flush_file(obj, 1, 0);
-+
-+ yaffs_gross_unlock(dev);
-+
-+ return 0;
-+}
-+
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
-+static int yaffs_sync_object(struct file *file, loff_t start, loff_t end, int datasync)
-+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
-+static int yaffs_sync_object(struct file *file, int datasync)
-+#else
-+static int yaffs_sync_object(struct file *file, struct dentry *dentry,
-+ int datasync)
-+#endif
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev;
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
-+ struct dentry *dentry = file->f_path.dentry;
-+#endif
-+
-+ obj = yaffs_dentry_to_obj(dentry);
-+
-+ dev = obj->my_dev;
-+
-+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC,
-+ "yaffs_sync_object");
-+ yaffs_gross_lock(dev);
-+ yaffs_flush_file(obj, 1, datasync);
-+ yaffs_gross_unlock(dev);
-+ return 0;
-+}
-+
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 22))
-+static const struct file_operations yaffs_file_operations = {
-+ .read = do_sync_read,
-+ .write = do_sync_write,
-+ .aio_read = generic_file_aio_read,
-+ .aio_write = generic_file_aio_write,
-+ .mmap = generic_file_mmap,
-+ .flush = yaffs_file_flush,
-+ .fsync = yaffs_sync_object,
-+ .splice_read = generic_file_splice_read,
-+ .splice_write = generic_file_splice_write,
-+ .llseek = generic_file_llseek,
-+};
-+
-+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
-+
-+static const struct file_operations yaffs_file_operations = {
-+ .read = do_sync_read,
-+ .write = do_sync_write,
-+ .aio_read = generic_file_aio_read,
-+ .aio_write = generic_file_aio_write,
-+ .mmap = generic_file_mmap,
-+ .flush = yaffs_file_flush,
-+ .fsync = yaffs_sync_object,
-+ .sendfile = generic_file_sendfile,
-+};
-+
-+#else
-+
-+static const struct file_operations yaffs_file_operations = {
-+ .read = generic_file_read,
-+ .write = generic_file_write,
-+ .mmap = generic_file_mmap,
-+ .flush = yaffs_file_flush,
-+ .fsync = yaffs_sync_object,
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+ .sendfile = generic_file_sendfile,
-+#endif
-+};
-+#endif
-+
-+
-+
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
-+static void zero_user_segment(struct page *page, unsigned start, unsigned end)
-+{
-+ void *kaddr = kmap_atomic(page, KM_USER0);
-+ memset(kaddr + start, 0, end - start);
-+ kunmap_atomic(kaddr, KM_USER0);
-+ flush_dcache_page(page);
-+}
-+#endif
-+
-+
-+static int yaffs_vfs_setsize(struct inode *inode, loff_t newsize)
-+{
-+#ifdef YAFFS_USE_TRUNCATE_SETSIZE
-+ truncate_setsize(inode, newsize);
-+ return 0;
-+#else
-+ truncate_inode_pages(&inode->i_data, newsize);
-+ return 0;
-+#endif
-+
-+}
-+
-+
-+static int yaffs_vfs_setattr(struct inode *inode, struct iattr *attr)
-+{
-+#ifdef YAFFS_USE_SETATTR_COPY
-+ setattr_copy(inode, attr);
-+ return 0;
-+#else
-+ return inode_setattr(inode, attr);
-+#endif
-+
-+}
-+
-+static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
-+{
-+ struct inode *inode = dentry->d_inode;
-+ int error = 0;
-+ struct yaffs_dev *dev;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_setattr of object %d",
-+ yaffs_inode_to_obj(inode)->obj_id);
-+#if 0
-+ /* Fail if a requested resize >= 2GB */
-+ if (attr->ia_valid & ATTR_SIZE && (attr->ia_size >> 31))
-+ error = -EINVAL;
-+#endif
-+
-+ if (error == 0)
-+ error = inode_change_ok(inode, attr);
-+ if (error == 0) {
-+ int result;
-+ if (!error) {
-+ error = yaffs_vfs_setattr(inode, attr);
-+ yaffs_trace(YAFFS_TRACE_OS, "inode_setattr called");
-+ if (attr->ia_valid & ATTR_SIZE) {
-+ yaffs_vfs_setsize(inode, attr->ia_size);
-+ inode->i_blocks = (inode->i_size + 511) >> 9;
-+ }
-+ }
-+ dev = yaffs_inode_to_obj(inode)->my_dev;
-+ if (attr->ia_valid & ATTR_SIZE) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "resize to %d(%x)",
-+ (int)(attr->ia_size),
-+ (int)(attr->ia_size));
-+ }
-+ yaffs_gross_lock(dev);
-+ result = yaffs_set_attribs(yaffs_inode_to_obj(inode), attr);
-+ if (result == YAFFS_OK) {
-+ error = 0;
-+ } else {
-+ error = -EPERM;
-+ }
-+ yaffs_gross_unlock(dev);
-+
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_setattr done returning %d", error);
-+
-+ return error;
-+}
-+
-+static int yaffs_setxattr(struct dentry *dentry, const char *name,
-+ const void *value, size_t size, int flags)
-+{
-+ struct inode *inode = dentry->d_inode;
-+ int error = 0;
-+ struct yaffs_dev *dev;
-+ struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_setxattr of object %d", obj->obj_id);
-+
-+ if (error == 0) {
-+ int result;
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+ result = yaffs_set_xattrib(obj, name, value, size, flags);
-+ if (result == YAFFS_OK)
-+ error = 0;
-+ else if (result < 0)
-+ error = result;
-+ yaffs_gross_unlock(dev);
-+
-+ }
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_setxattr done returning %d", error);
-+
-+ return error;
-+}
-+
-+static ssize_t yaffs_getxattr(struct dentry * dentry, const char *name,
-+ void *buff, size_t size)
-+{
-+ struct inode *inode = dentry->d_inode;
-+ int error = 0;
-+ struct yaffs_dev *dev;
-+ struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_getxattr \"%s\" from object %d",
-+ name, obj->obj_id);
-+
-+ if (error == 0) {
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+ error = yaffs_get_xattrib(obj, name, buff, size);
-+ yaffs_gross_unlock(dev);
-+
-+ }
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_getxattr done returning %d", error);
-+
-+ return error;
-+}
-+
-+static int yaffs_removexattr(struct dentry *dentry, const char *name)
-+{
-+ struct inode *inode = dentry->d_inode;
-+ int error = 0;
-+ struct yaffs_dev *dev;
-+ struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_removexattr of object %d", obj->obj_id);
-+
-+ if (error == 0) {
-+ int result;
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+ result = yaffs_remove_xattrib(obj, name);
-+ if (result == YAFFS_OK)
-+ error = 0;
-+ else if (result < 0)
-+ error = result;
-+ yaffs_gross_unlock(dev);
-+
-+ }
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_removexattr done returning %d", error);
-+
-+ return error;
-+}
-+
-+static ssize_t yaffs_listxattr(struct dentry * dentry, char *buff, size_t size)
-+{
-+ struct inode *inode = dentry->d_inode;
-+ int error = 0;
-+ struct yaffs_dev *dev;
-+ struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_listxattr of object %d", obj->obj_id);
-+
-+ if (error == 0) {
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+ error = yaffs_list_xattrib(obj, buff, size);
-+ yaffs_gross_unlock(dev);
-+
-+ }
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_listxattr done returning %d", error);
-+
-+ return error;
-+}
-+
-+
-+static const struct inode_operations yaffs_file_inode_operations = {
-+ .setattr = yaffs_setattr,
-+ .setxattr = yaffs_setxattr,
-+ .getxattr = yaffs_getxattr,
-+ .listxattr = yaffs_listxattr,
-+ .removexattr = yaffs_removexattr,
-+};
-+
-+
-+static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
-+ int buflen)
-+{
-+ unsigned char *alias;
-+ int ret;
-+
-+ struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry));
-+
-+ yaffs_gross_unlock(dev);
-+
-+ if (!alias)
-+ return -ENOMEM;
-+
-+ ret = vfs_readlink(dentry, buffer, buflen, alias);
-+ kfree(alias);
-+ return ret;
-+}
-+
-+#if (YAFFS_NEW_FOLLOW_LINK == 1)
-+static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
-+{
-+ void *ret;
-+#else
-+static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
-+{
-+ int ret
-+#endif
-+ unsigned char *alias;
-+ int ret_int = 0;
-+ struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry));
-+ yaffs_gross_unlock(dev);
-+
-+ if (!alias) {
-+ ret_int = -ENOMEM;
-+ goto out;
-+ }
-+#if (YAFFS_NEW_FOLLOW_LINK == 1)
-+ nd_set_link(nd, alias);
-+ ret = alias;
-+out:
-+ if (ret_int)
-+ ret = ERR_PTR(ret_int);
-+ return ret;
-+#else
-+ ret = vfs_follow_link(nd, alias);
-+ kfree(alias);
-+out:
-+ if (ret_int)
-+ ret = ret_int;
-+ return ret;
-+#endif
-+}
-+
-+
-+#ifdef YAFFS_HAS_PUT_INODE
-+
-+/* For now put inode is just for debugging
-+ * Put inode is called when the inode **structure** is put.
-+ */
-+static void yaffs_put_inode(struct inode *inode)
-+{
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_put_inode: ino %d, count %d"),
-+ (int)inode->i_ino, atomic_read(&inode->i_count);
-+
-+}
-+#endif
-+
-+#if (YAFFS_NEW_FOLLOW_LINK == 1)
-+void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias)
-+{
-+ kfree(alias);
-+}
-+#endif
-+
-+static const struct inode_operations yaffs_symlink_inode_operations = {
-+ .readlink = yaffs_readlink,
-+ .follow_link = yaffs_follow_link,
-+#if (YAFFS_NEW_FOLLOW_LINK == 1)
-+ .put_link = yaffs_put_link,
-+#endif
-+ .setattr = yaffs_setattr,
-+ .setxattr = yaffs_setxattr,
-+ .getxattr = yaffs_getxattr,
-+ .listxattr = yaffs_listxattr,
-+ .removexattr = yaffs_removexattr,
-+};
-+
-+#ifdef YAFFS_USE_OWN_IGET
-+
-+static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino)
-+{
-+ struct inode *inode;
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_iget for %lu", ino);
-+
-+ inode = iget_locked(sb, ino);
-+ if (!inode)
-+ return ERR_PTR(-ENOMEM);
-+ if (!(inode->i_state & I_NEW))
-+ return inode;
-+
-+ /* NB This is called as a side effect of other functions, but
-+ * we had to release the lock to prevent deadlocks, so
-+ * need to lock again.
-+ */
-+
-+ yaffs_gross_lock(dev);
-+
-+ obj = yaffs_find_by_number(dev, inode->i_ino);
-+
-+ yaffs_fill_inode_from_obj(inode, obj);
-+
-+ yaffs_gross_unlock(dev);
-+
-+ unlock_new_inode(inode);
-+ return inode;
-+}
-+
-+#else
-+
-+static void yaffs_read_inode(struct inode *inode)
-+{
-+ /* NB This is called as a side effect of other functions, but
-+ * we had to release the lock to prevent deadlocks, so
-+ * need to lock again.
-+ */
-+
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev = yaffs_super_to_dev(inode->i_sb);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_read_inode for %d", (int)inode->i_ino);
-+
-+ if (current != yaffs_dev_to_lc(dev)->readdir_process)
-+ yaffs_gross_lock(dev);
-+
-+ obj = yaffs_find_by_number(dev, inode->i_ino);
-+
-+ yaffs_fill_inode_from_obj(inode, obj);
-+
-+ if (current != yaffs_dev_to_lc(dev)->readdir_process)
-+ yaffs_gross_unlock(dev);
-+}
-+
-+#endif
-+
-+
-+
-+struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
-+ struct yaffs_obj *obj)
-+{
-+ struct inode *inode;
-+
-+ if (!sb) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_get_inode for NULL super_block!!");
-+ return NULL;
-+
-+ }
-+
-+ if (!obj) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_get_inode for NULL object!!");
-+ return NULL;
-+
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_get_inode for object %d", obj->obj_id);
-+
-+ inode = Y_IGET(sb, obj->obj_id);
-+ if (IS_ERR(inode))
-+ return NULL;
-+
-+ /* NB Side effect: iget calls back to yaffs_read_inode(). */
-+ /* iget also increments the inode's i_count */
-+ /* NB You can't be holding gross_lock or deadlock will happen! */
-+
-+ return inode;
-+}
-+
-+
-+
-+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
-+#define YCRED(x) x
-+#else
-+#define YCRED(x) (x->cred)
-+#endif
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 4, 0))
-+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
-+ dev_t rdev)
-+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
-+ dev_t rdev)
-+#else
-+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
-+ int rdev)
-+#endif
-+{
-+ struct inode *inode;
-+
-+ struct yaffs_obj *obj = NULL;
-+ struct yaffs_dev *dev;
-+
-+ struct yaffs_obj *parent = yaffs_inode_to_obj(dir);
-+
-+ int error = -ENOSPC;
-+ uid_t uid = YCRED_FSUID();
-+ gid_t gid =
-+ (dir->i_mode & S_ISGID) ? i_gid_read(dir) : YCRED_FSGID();
-+
-+ if ((dir->i_mode & S_ISGID) && S_ISDIR(mode))
-+ mode |= S_ISGID;
-+
-+ if (parent) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_mknod: parent object %d type %d",
-+ parent->obj_id, parent->variant_type);
-+ } else {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_mknod: could not get parent object");
-+ return -EPERM;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_mknod: making oject for %s, mode %x dev %x",
-+ dentry->d_name.name, mode, rdev);
-+
-+ dev = parent->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ switch (mode & S_IFMT) {
-+ default:
-+ /* Special (socket, fifo, device...) */
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making special");
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+ obj =
-+ yaffs_create_special(parent, dentry->d_name.name, mode, uid,
-+ gid, old_encode_dev(rdev));
-+#else
-+ obj =
-+ yaffs_create_special(parent, dentry->d_name.name, mode, uid,
-+ gid, rdev);
-+#endif
-+ break;
-+ case S_IFREG: /* file */
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making file");
-+ obj = yaffs_create_file(parent, dentry->d_name.name, mode, uid,
-+ gid);
-+ break;
-+ case S_IFDIR: /* directory */
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making directory");
-+ obj = yaffs_create_dir(parent, dentry->d_name.name, mode,
-+ uid, gid);
-+ break;
-+ case S_IFLNK: /* symlink */
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making symlink");
-+ obj = NULL; /* Do we ever get here? */
-+ break;
-+ }
-+
-+ /* Can not call yaffs_get_inode() with gross lock held */
-+ yaffs_gross_unlock(dev);
-+
-+ if (obj) {
-+ inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
-+ d_instantiate(dentry, inode);
-+ update_dir_time(dir);
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_mknod created object %d count = %d",
-+ obj->obj_id, atomic_read(&inode->i_count));
-+ error = 0;
-+ yaffs_fill_inode_from_obj(dir, parent);
-+ } else {
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod failed making object");
-+ error = -ENOMEM;
-+ }
-+
-+ return error;
-+}
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 4, 0))
-+static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
-+#else
-+static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
-+#endif
-+{
-+ int ret_val;
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_mkdir");
-+ ret_val = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
-+ return ret_val;
-+}
-+
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 6, 0))
-+static int yaffs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-+ bool dummy)
-+#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 4, 0))
-+static int yaffs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-+ struct nameidata *n)
-+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
-+ struct nameidata *n)
-+#else
-+static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode)
-+#endif
-+{
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_create");
-+ return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
-+}
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 6, 0))
-+static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
-+ unsigned int dummy)
-+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
-+ struct nameidata *n)
-+#else
-+static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
-+#endif
-+{
-+ struct yaffs_obj *obj;
-+ struct inode *inode = NULL; /* NCB 2.5/2.6 needs NULL here */
-+
-+ struct yaffs_dev *dev = yaffs_inode_to_obj(dir)->my_dev;
-+
-+ if (current != yaffs_dev_to_lc(dev)->readdir_process)
-+ yaffs_gross_lock(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_lookup for %d:%s",
-+ yaffs_inode_to_obj(dir)->obj_id, dentry->d_name.name);
-+
-+ obj = yaffs_find_by_name(yaffs_inode_to_obj(dir), dentry->d_name.name);
-+
-+ obj = yaffs_get_equivalent_obj(obj); /* in case it was a hardlink */
-+
-+ /* Can't hold gross lock when calling yaffs_get_inode() */
-+ if (current != yaffs_dev_to_lc(dev)->readdir_process)
-+ yaffs_gross_unlock(dev);
-+
-+ if (obj) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_lookup found %d", obj->obj_id);
-+
-+ inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
-+ } else {
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_lookup not found");
-+
-+ }
-+
-+/* added NCB for 2.5/6 compatability - forces add even if inode is
-+ * NULL which creates dentry hash */
-+ d_add(dentry, inode);
-+
-+ return NULL;
-+}
-+
-+/*
-+ * Create a link...
-+ */
-+static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
-+ struct dentry *dentry)
-+{
-+ struct inode *inode = old_dentry->d_inode;
-+ struct yaffs_obj *obj = NULL;
-+ struct yaffs_obj *link = NULL;
-+ struct yaffs_dev *dev;
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_link");
-+
-+ obj = yaffs_inode_to_obj(inode);
-+ dev = obj->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ if (!S_ISDIR(inode->i_mode)) /* Don't link directories */
-+ link =
-+ yaffs_link_obj(yaffs_inode_to_obj(dir), dentry->d_name.name,
-+ obj);
-+
-+ if (link) {
-+ set_nlink(old_dentry->d_inode, yaffs_get_obj_link_count(obj));
-+ d_instantiate(dentry, old_dentry->d_inode);
-+ atomic_inc(&old_dentry->d_inode->i_count);
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_link link count %d i_count %d",
-+ old_dentry->d_inode->i_nlink,
-+ atomic_read(&old_dentry->d_inode->i_count));
-+ }
-+
-+ yaffs_gross_unlock(dev);
-+
-+ if (link) {
-+ update_dir_time(dir);
-+ return 0;
-+ }
-+
-+ return -EPERM;
-+}
-+
-+static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
-+ const char *symname)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev;
-+ uid_t uid = YCRED_FSUID();
-+ gid_t gid =
-+ (dir->i_mode & S_ISGID) ? i_gid_read(dir) : YCRED_FSGID();
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_symlink");
-+
-+ if (strnlen(dentry->d_name.name, YAFFS_MAX_NAME_LENGTH + 1) >
-+ YAFFS_MAX_NAME_LENGTH)
-+ return -ENAMETOOLONG;
-+
-+ if (strnlen(symname, YAFFS_MAX_ALIAS_LENGTH + 1) >
-+ YAFFS_MAX_ALIAS_LENGTH)
-+ return -ENAMETOOLONG;
-+
-+ dev = yaffs_inode_to_obj(dir)->my_dev;
-+ yaffs_gross_lock(dev);
-+ obj = yaffs_create_symlink(yaffs_inode_to_obj(dir), dentry->d_name.name,
-+ S_IFLNK | S_IRWXUGO, uid, gid, symname);
-+ yaffs_gross_unlock(dev);
-+
-+ if (obj) {
-+ struct inode *inode;
-+
-+ inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
-+ d_instantiate(dentry, inode);
-+ update_dir_time(dir);
-+ yaffs_trace(YAFFS_TRACE_OS, "symlink created OK");
-+ return 0;
-+ } else {
-+ yaffs_trace(YAFFS_TRACE_OS, "symlink not created");
-+ }
-+
-+ return -ENOMEM;
-+}
-+
-+/*
-+ * The VFS layer already does all the dentry stuff for rename.
-+ *
-+ * NB: POSIX says you can rename an object over an old object of the same name
-+ */
-+static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
-+ struct inode *new_dir, struct dentry *new_dentry)
-+{
-+ struct yaffs_dev *dev;
-+ int ret_val = YAFFS_FAIL;
-+ struct yaffs_obj *target;
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_rename");
-+ dev = yaffs_inode_to_obj(old_dir)->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ /* Check if the target is an existing directory that is not empty. */
-+ target = yaffs_find_by_name(yaffs_inode_to_obj(new_dir),
-+ new_dentry->d_name.name);
-+
-+ if (target && target->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY &&
-+ !list_empty(&target->variant.dir_variant.children)) {
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "target is non-empty dir");
-+
-+ ret_val = YAFFS_FAIL;
-+ } else {
-+ /* Now does unlinking internally using shadowing mechanism */
-+ yaffs_trace(YAFFS_TRACE_OS, "calling yaffs_rename_obj");
-+
-+ ret_val = yaffs_rename_obj(yaffs_inode_to_obj(old_dir),
-+ old_dentry->d_name.name,
-+ yaffs_inode_to_obj(new_dir),
-+ new_dentry->d_name.name);
-+ }
-+ yaffs_gross_unlock(dev);
-+
-+ if (ret_val == YAFFS_OK) {
-+ if (target)
-+ inode_dec_link_count(new_dentry->d_inode);
-+
-+ update_dir_time(old_dir);
-+ if (old_dir != new_dir)
-+ update_dir_time(new_dir);
-+ return 0;
-+ } else {
-+ return -ENOTEMPTY;
-+ }
-+}
-+
-+
-+
-+
-+static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
-+{
-+ int ret_val;
-+
-+ struct yaffs_dev *dev;
-+ struct yaffs_obj *obj;
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_unlink %d:%s",
-+ (int)(dir->i_ino), dentry->d_name.name);
-+ obj = yaffs_inode_to_obj(dir);
-+ dev = obj->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ ret_val = yaffs_unlinker(obj, dentry->d_name.name);
-+
-+ if (ret_val == YAFFS_OK) {
-+ inode_dec_link_count(dentry->d_inode);
-+ dir->i_version++;
-+ yaffs_gross_unlock(dev);
-+ update_dir_time(dir);
-+ return 0;
-+ }
-+ yaffs_gross_unlock(dev);
-+ return -ENOTEMPTY;
-+}
-+
-+
-+
-+static const struct inode_operations yaffs_dir_inode_operations = {
-+ .create = yaffs_create,
-+ .lookup = yaffs_lookup,
-+ .link = yaffs_link,
-+ .unlink = yaffs_unlink,
-+ .symlink = yaffs_symlink,
-+ .mkdir = yaffs_mkdir,
-+ .rmdir = yaffs_unlink,
-+ .mknod = yaffs_mknod,
-+ .rename = yaffs_rename,
-+ .setattr = yaffs_setattr,
-+ .setxattr = yaffs_setxattr,
-+ .getxattr = yaffs_getxattr,
-+ .listxattr = yaffs_listxattr,
-+ .removexattr = yaffs_removexattr,
-+};
-+
-+/*-----------------------------------------------------------------*/
-+/* Directory search context allows us to unlock access to yaffs during
-+ * filldir without causing problems with the directory being modified.
-+ * This is similar to the tried and tested mechanism used in yaffs direct.
-+ *
-+ * A search context iterates along a doubly linked list of siblings in the
-+ * directory. If the iterating object is deleted then this would corrupt
-+ * the list iteration, likely causing a crash. The search context avoids
-+ * this by using the remove_obj_fn to move the search context to the
-+ * next object before the object is deleted.
-+ *
-+ * Many readdirs (and thus seach conexts) may be alive simulateously so
-+ * each struct yaffs_dev has a list of these.
-+ *
-+ * A seach context lives for the duration of a readdir.
-+ *
-+ * All these functions must be called while yaffs is locked.
-+ */
-+
-+struct yaffs_search_context {
-+ struct yaffs_dev *dev;
-+ struct yaffs_obj *dir_obj;
-+ struct yaffs_obj *next_return;
-+ struct list_head others;
-+};
-+
-+/*
-+ * yaffs_new_search() creates a new search context, initialises it and
-+ * adds it to the device's search context list.
-+ *
-+ * Called at start of readdir.
-+ */
-+static struct yaffs_search_context *yaffs_new_search(struct yaffs_obj *dir)
-+{
-+ struct yaffs_dev *dev = dir->my_dev;
-+ struct yaffs_search_context *sc =
-+ kmalloc(sizeof(struct yaffs_search_context), GFP_NOFS);
-+ if (sc) {
-+ sc->dir_obj = dir;
-+ sc->dev = dev;
-+ if (list_empty(&sc->dir_obj->variant.dir_variant.children))
-+ sc->next_return = NULL;
-+ else
-+ sc->next_return =
-+ list_entry(dir->variant.dir_variant.children.next,
-+ struct yaffs_obj, siblings);
-+ INIT_LIST_HEAD(&sc->others);
-+ list_add(&sc->others, &(yaffs_dev_to_lc(dev)->search_contexts));
-+ }
-+ return sc;
-+}
-+
-+/*
-+ * yaffs_search_end() disposes of a search context and cleans up.
-+ */
-+static void yaffs_search_end(struct yaffs_search_context *sc)
-+{
-+ if (sc) {
-+ list_del(&sc->others);
-+ kfree(sc);
-+ }
-+}
-+
-+/*
-+ * yaffs_search_advance() moves a search context to the next object.
-+ * Called when the search iterates or when an object removal causes
-+ * the search context to be moved to the next object.
-+ */
-+static void yaffs_search_advance(struct yaffs_search_context *sc)
-+{
-+ if (!sc)
-+ return;
-+
-+ if (sc->next_return == NULL ||
-+ list_empty(&sc->dir_obj->variant.dir_variant.children))
-+ sc->next_return = NULL;
-+ else {
-+ struct list_head *next = sc->next_return->siblings.next;
-+
-+ if (next == &sc->dir_obj->variant.dir_variant.children)
-+ sc->next_return = NULL; /* end of list */
-+ else
-+ sc->next_return =
-+ list_entry(next, struct yaffs_obj, siblings);
-+ }
-+}
-+
-+/*
-+ * yaffs_remove_obj_callback() is called when an object is unlinked.
-+ * We check open search contexts and advance any which are currently
-+ * on the object being iterated.
-+ */
-+static void yaffs_remove_obj_callback(struct yaffs_obj *obj)
-+{
-+
-+ struct list_head *i;
-+ struct yaffs_search_context *sc;
-+ struct list_head *search_contexts =
-+ &(yaffs_dev_to_lc(obj->my_dev)->search_contexts);
-+
-+ /* Iterate through the directory search contexts.
-+ * If any are currently on the object being removed, then advance
-+ * the search context to the next object to prevent a hanging pointer.
-+ */
-+ list_for_each(i, search_contexts) {
-+ sc = list_entry(i, struct yaffs_search_context, others);
-+ if (sc->next_return == obj)
-+ yaffs_search_advance(sc);
-+ }
-+
-+}
-+
-+
-+/*-----------------------------------------------------------------*/
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 12, 0))
-+static int yaffs_readdir(struct file *file, struct dir_context *ctx)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev;
-+ struct yaffs_search_context *sc;
-+ struct inode *inode = file->f_dentry->d_inode;
-+ unsigned long offset, curoffs;
-+ struct yaffs_obj *l;
-+ int ret_val = 0;
-+
-+ char name[YAFFS_MAX_NAME_LENGTH + 1];
-+
-+ obj = yaffs_dentry_to_obj(file->f_dentry);
-+ dev = obj->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ yaffs_dev_to_lc(dev)->readdir_process = current;
-+
-+ offset = ctx->pos;
-+
-+ sc = yaffs_new_search(obj);
-+ if (!sc) {
-+ ret_val = -ENOMEM;
-+ goto out;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readdir: starting at %d", (int)offset);
-+
-+ if (offset == 0) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readdir: entry . ino %d",
-+ (int)inode->i_ino);
-+ yaffs_gross_unlock(dev);
-+ if (!dir_emit_dot(file, ctx)) {
-+ yaffs_gross_lock(dev);
-+ goto out;
-+ }
-+ yaffs_gross_lock(dev);
-+ offset++;
-+ ctx->pos++;
-+ }
-+ if (offset == 1) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readdir: entry .. ino %d",
-+ (int)file->f_dentry->d_parent->d_inode->i_ino);
-+ yaffs_gross_unlock(dev);
-+ if (!dir_emit_dotdot(file, ctx)) {
-+ yaffs_gross_lock(dev);
-+ goto out;
-+ }
-+ yaffs_gross_lock(dev);
-+ offset++;
-+ ctx->pos++;
-+ }
-+
-+ curoffs = 1;
-+
-+ /* If the directory has changed since the open or last call to
-+ readdir, rewind to after the 2 canned entries. */
-+ if (file->f_version != inode->i_version) {
-+ offset = 2;
-+ ctx->pos = offset;
-+ file->f_version = inode->i_version;
-+ }
-+
-+ while (sc->next_return) {
-+ curoffs++;
-+ l = sc->next_return;
-+ if (curoffs >= offset) {
-+ int this_inode = yaffs_get_obj_inode(l);
-+ int this_type = yaffs_get_obj_type(l);
-+
-+ yaffs_get_obj_name(l, name, YAFFS_MAX_NAME_LENGTH + 1);
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readdir: %s inode %d",
-+ name, yaffs_get_obj_inode(l));
-+
-+ yaffs_gross_unlock(dev);
-+
-+ if (!dir_emit(ctx, name, strlen(name),
-+ this_inode, this_type) < 0) {
-+ yaffs_gross_lock(dev);
-+ goto out;
-+ }
-+
-+ yaffs_gross_lock(dev);
-+
-+ offset++;
-+ ctx->pos++;
-+ }
-+ yaffs_search_advance(sc);
-+ }
-+
-+out:
-+ yaffs_search_end(sc);
-+ yaffs_dev_to_lc(dev)->readdir_process = NULL;
-+ yaffs_gross_unlock(dev);
-+
-+ return ret_val;
-+}
-+#else
-+static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev;
-+ struct yaffs_search_context *sc;
-+ struct inode *inode = f->f_dentry->d_inode;
-+ unsigned long offset, curoffs;
-+ struct yaffs_obj *l;
-+ int ret_val = 0;
-+
-+ char name[YAFFS_MAX_NAME_LENGTH + 1];
-+
-+ obj = yaffs_dentry_to_obj(f->f_dentry);
-+ dev = obj->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ yaffs_dev_to_lc(dev)->readdir_process = current;
-+
-+ offset = f->f_pos;
-+
-+ sc = yaffs_new_search(obj);
-+ if (!sc) {
-+ ret_val = -ENOMEM;
-+ goto out;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readdir: starting at %d", (int)offset);
-+
-+ if (offset == 0) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readdir: entry . ino %d",
-+ (int)inode->i_ino);
-+ yaffs_gross_unlock(dev);
-+ if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR) < 0) {
-+ yaffs_gross_lock(dev);
-+ goto out;
-+ }
-+ yaffs_gross_lock(dev);
-+ offset++;
-+ f->f_pos++;
-+ }
-+ if (offset == 1) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readdir: entry .. ino %d",
-+ (int)f->f_dentry->d_parent->d_inode->i_ino);
-+ yaffs_gross_unlock(dev);
-+ if (filldir(dirent, "..", 2, offset,
-+ f->f_dentry->d_parent->d_inode->i_ino,
-+ DT_DIR) < 0) {
-+ yaffs_gross_lock(dev);
-+ goto out;
-+ }
-+ yaffs_gross_lock(dev);
-+ offset++;
-+ f->f_pos++;
-+ }
-+
-+ curoffs = 1;
-+
-+ /* If the directory has changed since the open or last call to
-+ readdir, rewind to after the 2 canned entries. */
-+ if (f->f_version != inode->i_version) {
-+ offset = 2;
-+ f->f_pos = offset;
-+ f->f_version = inode->i_version;
-+ }
-+
-+ while (sc->next_return) {
-+ curoffs++;
-+ l = sc->next_return;
-+ if (curoffs >= offset) {
-+ int this_inode = yaffs_get_obj_inode(l);
-+ int this_type = yaffs_get_obj_type(l);
-+
-+ yaffs_get_obj_name(l, name, YAFFS_MAX_NAME_LENGTH + 1);
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readdir: %s inode %d",
-+ name, yaffs_get_obj_inode(l));
-+
-+ yaffs_gross_unlock(dev);
-+
-+ if (filldir(dirent,
-+ name,
-+ strlen(name),
-+ offset, this_inode, this_type) < 0) {
-+ yaffs_gross_lock(dev);
-+ goto out;
-+ }
-+
-+ yaffs_gross_lock(dev);
-+
-+ offset++;
-+ f->f_pos++;
-+ }
-+ yaffs_search_advance(sc);
-+ }
-+
-+out:
-+ yaffs_search_end(sc);
-+ yaffs_dev_to_lc(dev)->readdir_process = NULL;
-+ yaffs_gross_unlock(dev);
-+
-+ return ret_val;
-+}
-+#endif
-+
-+static const struct file_operations yaffs_dir_operations = {
-+ .read = generic_read_dir,
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 12, 0))
-+ .iterate = yaffs_readdir,
-+#else
-+ .readdir = yaffs_readdir,
-+#endif
-+ .fsync = yaffs_sync_object,
-+ .llseek = generic_file_llseek,
-+};
-+
-+static void yaffs_fill_inode_from_obj(struct inode *inode,
-+ struct yaffs_obj *obj)
-+{
-+ if (inode && obj) {
-+
-+ /* Check mode against the variant type and attempt to repair if broken. */
-+ u32 mode = obj->yst_mode;
-+ switch (obj->variant_type) {
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ if (!S_ISREG(mode)) {
-+ obj->yst_mode &= ~S_IFMT;
-+ obj->yst_mode |= S_IFREG;
-+ }
-+
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ if (!S_ISLNK(mode)) {
-+ obj->yst_mode &= ~S_IFMT;
-+ obj->yst_mode |= S_IFLNK;
-+ }
-+
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ if (!S_ISDIR(mode)) {
-+ obj->yst_mode &= ~S_IFMT;
-+ obj->yst_mode |= S_IFDIR;
-+ }
-+
-+ break;
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ default:
-+ /* TODO? */
-+ break;
-+ }
-+
-+ inode->i_flags |= S_NOATIME;
-+
-+ inode->i_ino = obj->obj_id;
-+ inode->i_mode = obj->yst_mode;
-+ i_uid_write(inode, obj->yst_uid);
-+ i_gid_write(inode, obj->yst_gid);
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
-+ inode->i_blksize = inode->i_sb->s_blocksize;
-+#endif
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+
-+ inode->i_rdev = old_decode_dev(obj->yst_rdev);
-+ inode->i_atime.tv_sec = (time_t) (obj->yst_atime);
-+ inode->i_atime.tv_nsec = 0;
-+ inode->i_mtime.tv_sec = (time_t) obj->yst_mtime;
-+ inode->i_mtime.tv_nsec = 0;
-+ inode->i_ctime.tv_sec = (time_t) obj->yst_ctime;
-+ inode->i_ctime.tv_nsec = 0;
-+#else
-+ inode->i_rdev = obj->yst_rdev;
-+ inode->i_atime = obj->yst_atime;
-+ inode->i_mtime = obj->yst_mtime;
-+ inode->i_ctime = obj->yst_ctime;
-+#endif
-+ inode->i_size = yaffs_get_obj_length(obj);
-+ inode->i_blocks = (inode->i_size + 511) >> 9;
-+
-+ set_nlink(inode, yaffs_get_obj_link_count(obj));
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_fill_inode mode %x uid %d gid %d size %lld count %d",
-+ inode->i_mode, i_uid_read(inode), i_gid_read(inode),
-+ inode->i_size, atomic_read(&inode->i_count));
-+
-+ switch (obj->yst_mode & S_IFMT) {
-+ default: /* fifo, device or socket */
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+ init_special_inode(inode, obj->yst_mode,
-+ old_decode_dev(obj->yst_rdev));
-+#else
-+ init_special_inode(inode, obj->yst_mode,
-+ (dev_t) (obj->yst_rdev));
-+#endif
-+ break;
-+ case S_IFREG: /* file */
-+ inode->i_op = &yaffs_file_inode_operations;
-+ inode->i_fop = &yaffs_file_operations;
-+ inode->i_mapping->a_ops =
-+ &yaffs_file_address_operations;
-+ break;
-+ case S_IFDIR: /* directory */
-+ inode->i_op = &yaffs_dir_inode_operations;
-+ inode->i_fop = &yaffs_dir_operations;
-+ break;
-+ case S_IFLNK: /* symlink */
-+ inode->i_op = &yaffs_symlink_inode_operations;
-+ break;
-+ }
-+
-+ yaffs_inode_to_obj_lv(inode) = obj;
-+
-+ obj->my_inode = inode;
-+
-+ } else {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_fill_inode invalid parameters");
-+ }
-+
-+}
-+
-+
-+
-+/*
-+ * yaffs background thread functions .
-+ * yaffs_bg_thread_fn() the thread function
-+ * yaffs_bg_start() launches the background thread.
-+ * yaffs_bg_stop() cleans up the background thread.
-+ *
-+ * NB:
-+ * The thread should only run after the yaffs is initialised
-+ * The thread should be stopped before yaffs is unmounted.
-+ * The thread should not do any writing while the fs is in read only.
-+ */
-+
-+static unsigned yaffs_bg_gc_urgency(struct yaffs_dev *dev)
-+{
-+ unsigned erased_chunks =
-+ dev->n_erased_blocks * dev->param.chunks_per_block;
-+ struct yaffs_linux_context *context = yaffs_dev_to_lc(dev);
-+ unsigned scattered = 0; /* Free chunks not in an erased block */
-+
-+ if (erased_chunks < dev->n_free_chunks)
-+ scattered = (dev->n_free_chunks - erased_chunks);
-+
-+ if (!context->bg_running)
-+ return 0;
-+ else if (scattered < (dev->param.chunks_per_block * 2))
-+ return 0;
-+ else if (erased_chunks > dev->n_free_chunks / 2)
-+ return 0;
-+ else if (erased_chunks > dev->n_free_chunks / 4)
-+ return 1;
-+ else
-+ return 2;
-+}
-+
-+#ifdef YAFFS_COMPILE_BACKGROUND
-+
-+void yaffs_background_waker(unsigned long data)
-+{
-+ wake_up_process((struct task_struct *)data);
-+}
-+
-+static int yaffs_bg_thread_fn(void *data)
-+{
-+ struct yaffs_dev *dev = (struct yaffs_dev *)data;
-+ struct yaffs_linux_context *context = yaffs_dev_to_lc(dev);
-+ unsigned long now = jiffies;
-+ unsigned long next_dir_update = now;
-+ unsigned long next_gc = now;
-+ unsigned long expires;
-+ unsigned int urgency;
-+
-+ int gc_result;
-+ struct timer_list timer;
-+
-+ yaffs_trace(YAFFS_TRACE_BACKGROUND,
-+ "yaffs_background starting for dev %p", (void *)dev);
-+
-+#ifdef YAFFS_COMPILE_FREEZER
-+ set_freezable();
-+#endif
-+ while (context->bg_running) {
-+ yaffs_trace(YAFFS_TRACE_BACKGROUND, "yaffs_background");
-+
-+ if (kthread_should_stop())
-+ break;
-+
-+#ifdef YAFFS_COMPILE_FREEZER
-+ if (try_to_freeze())
-+ continue;
-+#endif
-+ yaffs_gross_lock(dev);
-+
-+ now = jiffies;
-+
-+ if (time_after(now, next_dir_update) && yaffs_bg_enable) {
-+ yaffs_update_dirty_dirs(dev);
-+ next_dir_update = now + HZ;
-+ }
-+
-+ if (time_after(now, next_gc) && yaffs_bg_enable) {
-+ if (!dev->is_checkpointed) {
-+ urgency = yaffs_bg_gc_urgency(dev);
-+ gc_result = yaffs_bg_gc(dev, urgency);
-+ if (urgency > 1)
-+ next_gc = now + HZ / 20 + 1;
-+ else if (urgency > 0)
-+ next_gc = now + HZ / 10 + 1;
-+ else
-+ next_gc = now + HZ * 2;
-+ } else {
-+ /*
-+ * gc not running so set to next_dir_update
-+ * to cut down on wake ups
-+ */
-+ next_gc = next_dir_update;
-+ }
-+ }
-+ yaffs_gross_unlock(dev);
-+#if 1
-+ expires = next_dir_update;
-+ if (time_before(next_gc, expires))
-+ expires = next_gc;
-+ if (time_before(expires, now))
-+ expires = now + HZ;
-+
-+ Y_INIT_TIMER(&timer);
-+ timer.expires = expires + 1;
-+ timer.data = (unsigned long)current;
-+ timer.function = yaffs_background_waker;
-+
-+ set_current_state(TASK_INTERRUPTIBLE);
-+ add_timer(&timer);
-+ schedule();
-+ del_timer_sync(&timer);
-+#else
-+ msleep(10);
-+#endif
-+ }
-+
-+ return 0;
-+}
-+
-+static int yaffs_bg_start(struct yaffs_dev *dev)
-+{
-+ int retval = 0;
-+ struct yaffs_linux_context *context = yaffs_dev_to_lc(dev);
-+
-+ if (dev->read_only)
-+ return -1;
-+
-+ context->bg_running = 1;
-+
-+ context->bg_thread = kthread_run(yaffs_bg_thread_fn,
-+ (void *)dev, "yaffs-bg-%d",
-+ context->mount_id);
-+
-+ if (IS_ERR(context->bg_thread)) {
-+ retval = PTR_ERR(context->bg_thread);
-+ context->bg_thread = NULL;
-+ context->bg_running = 0;
-+ }
-+ return retval;
-+}
-+
-+static void yaffs_bg_stop(struct yaffs_dev *dev)
-+{
-+ struct yaffs_linux_context *ctxt = yaffs_dev_to_lc(dev);
-+
-+ ctxt->bg_running = 0;
-+
-+ if (ctxt->bg_thread) {
-+ kthread_stop(ctxt->bg_thread);
-+ ctxt->bg_thread = NULL;
-+ }
-+}
-+#else
-+static int yaffs_bg_thread_fn(void *data)
-+{
-+ return 0;
-+}
-+
-+static int yaffs_bg_start(struct yaffs_dev *dev)
-+{
-+ return 0;
-+}
-+
-+static void yaffs_bg_stop(struct yaffs_dev *dev)
-+{
-+}
-+#endif
-+
-+
-+static void yaffs_flush_inodes(struct super_block *sb)
-+{
-+ struct inode *iptr;
-+ struct yaffs_obj *obj;
-+
-+ list_for_each_entry(iptr, &sb->s_inodes, i_sb_list) {
-+ obj = yaffs_inode_to_obj(iptr);
-+ if (obj) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "flushing obj %d",
-+ obj->obj_id);
-+ yaffs_flush_file(obj, 1, 0);
-+ }
-+ }
-+}
-+
-+static void yaffs_flush_super(struct super_block *sb, int do_checkpoint)
-+{
-+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
-+ if (!dev)
-+ return;
-+
-+ yaffs_flush_inodes(sb);
-+ yaffs_update_dirty_dirs(dev);
-+ yaffs_flush_whole_cache(dev);
-+ if (do_checkpoint)
-+ yaffs_checkpoint_save(dev);
-+}
-+
-+static LIST_HEAD(yaffs_context_list);
-+struct mutex yaffs_context_lock;
-+
-+static void yaffs_put_super(struct super_block *sb)
-+{
-+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
-+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_ALWAYS,
-+ "yaffs_put_super");
-+
-+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND,
-+ "Shutting down yaffs background thread");
-+ yaffs_bg_stop(dev);
-+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND,
-+ "yaffs background thread shut down");
-+
-+ yaffs_gross_lock(dev);
-+
-+ yaffs_flush_super(sb, 1);
-+
-+ yaffs_deinitialise(dev);
-+
-+ yaffs_gross_unlock(dev);
-+
-+ mutex_lock(&yaffs_context_lock);
-+ list_del_init(&(yaffs_dev_to_lc(dev)->context_list));
-+ mutex_unlock(&yaffs_context_lock);
-+
-+ if (yaffs_dev_to_lc(dev)->spare_buffer) {
-+ kfree(yaffs_dev_to_lc(dev)->spare_buffer);
-+ yaffs_dev_to_lc(dev)->spare_buffer = NULL;
-+ }
-+
-+ kfree(dev);
-+
-+ yaffs_put_mtd_device(mtd);
-+
-+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_ALWAYS,
-+ "yaffs_put_super done");
-+}
-+
-+
-+static unsigned yaffs_gc_control_callback(struct yaffs_dev *dev)
-+{
-+ return yaffs_gc_control;
-+}
-+
-+
-+#ifdef YAFFS_COMPILE_EXPORTFS
-+
-+static struct inode *yaffs2_nfs_get_inode(struct super_block *sb, uint64_t ino,
-+ uint32_t generation)
-+{
-+ return Y_IGET(sb, ino);
-+}
-+
-+static struct dentry *yaffs2_fh_to_dentry(struct super_block *sb,
-+ struct fid *fid, int fh_len,
-+ int fh_type)
-+{
-+ return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
-+ yaffs2_nfs_get_inode);
-+}
-+
-+static struct dentry *yaffs2_fh_to_parent(struct super_block *sb,
-+ struct fid *fid, int fh_len,
-+ int fh_type)
-+{
-+ return generic_fh_to_parent(sb, fid, fh_len, fh_type,
-+ yaffs2_nfs_get_inode);
-+}
-+
-+struct dentry *yaffs2_get_parent(struct dentry *dentry)
-+{
-+
-+ struct super_block *sb = dentry->d_inode->i_sb;
-+ struct dentry *parent = ERR_PTR(-ENOENT);
-+ struct inode *inode;
-+ unsigned long parent_ino;
-+ struct yaffs_obj *d_obj;
-+ struct yaffs_obj *parent_obj;
-+
-+ d_obj = yaffs_inode_to_obj(dentry->d_inode);
-+
-+ if (d_obj) {
-+ parent_obj = d_obj->parent;
-+ if (parent_obj) {
-+ parent_ino = yaffs_get_obj_inode(parent_obj);
-+ inode = Y_IGET(sb, parent_ino);
-+
-+ if (IS_ERR(inode)) {
-+ parent = ERR_CAST(inode);
-+ } else {
-+ parent = d_obtain_alias(inode);
-+ if (!IS_ERR(parent)) {
-+ parent = ERR_PTR(-ENOMEM);
-+ iput(inode);
-+ }
-+ }
-+ }
-+ }
-+
-+ return parent;
-+}
-+
-+/* Just declare a zero structure as a NULL value implies
-+ * using the default functions of exportfs.
-+ */
-+
-+static struct export_operations yaffs_export_ops = {
-+ .fh_to_dentry = yaffs2_fh_to_dentry,
-+ .fh_to_parent = yaffs2_fh_to_parent,
-+ .get_parent = yaffs2_get_parent,
-+};
-+
-+#endif
-+
-+static void yaffs_unstitch_obj(struct inode *inode, struct yaffs_obj *obj)
-+{
-+ /* Clear the association between the inode and
-+ * the struct yaffs_obj.
-+ */
-+ obj->my_inode = NULL;
-+ yaffs_inode_to_obj_lv(inode) = NULL;
-+
-+ /* If the object freeing was deferred, then the real
-+ * free happens now.
-+ * This should fix the inode inconsistency problem.
-+ */
-+ yaffs_handle_defered_free(obj);
-+}
-+
-+#ifdef YAFFS_HAS_EVICT_INODE
-+/* yaffs_evict_inode combines into one operation what was previously done in
-+ * yaffs_clear_inode() and yaffs_delete_inode()
-+ *
-+ */
-+static void yaffs_evict_inode(struct inode *inode)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev;
-+ int deleteme = 0;
-+
-+ obj = yaffs_inode_to_obj(inode);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_evict_inode: ino %d, count %d %s",
-+ (int)inode->i_ino, atomic_read(&inode->i_count),
-+ obj ? "object exists" : "null object");
-+
-+ if (!inode->i_nlink && !is_bad_inode(inode))
-+ deleteme = 1;
-+ truncate_inode_pages(&inode->i_data, 0);
-+ Y_CLEAR_INODE(inode);
-+
-+ if (deleteme && obj) {
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+ yaffs_del_obj(obj);
-+ yaffs_gross_unlock(dev);
-+ }
-+ if (obj) {
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+ yaffs_unstitch_obj(inode, obj);
-+ yaffs_gross_unlock(dev);
-+ }
-+}
-+#else
-+
-+/* clear is called to tell the fs to release any per-inode data it holds.
-+ * The object might still exist on disk and is just being thrown out of the cache
-+ * or else the object has actually been deleted and we're being called via
-+ * the chain
-+ * yaffs_delete_inode() -> clear_inode()->yaffs_clear_inode()
-+ */
-+
-+static void yaffs_clear_inode(struct inode *inode)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev;
-+
-+ obj = yaffs_inode_to_obj(inode);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_clear_inode: ino %d, count %d %s",
-+ (int)inode->i_ino, atomic_read(&inode->i_count),
-+ obj ? "object exists" : "null object");
-+
-+ if (obj) {
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+ yaffs_unstitch_obj(inode, obj);
-+ yaffs_gross_unlock(dev);
-+ }
-+
-+}
-+
-+/* delete is called when the link count is zero and the inode
-+ * is put (ie. nobody wants to know about it anymore, time to
-+ * delete the file).
-+ * NB Must call clear_inode()
-+ */
-+static void yaffs_delete_inode(struct inode *inode)
-+{
-+ struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
-+ struct yaffs_dev *dev;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_delete_inode: ino %d, count %d %s",
-+ (int)inode->i_ino, atomic_read(&inode->i_count),
-+ obj ? "object exists" : "null object");
-+
-+ if (obj) {
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+ yaffs_del_obj(obj);
-+ yaffs_gross_unlock(dev);
-+ }
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
-+ truncate_inode_pages(&inode->i_data, 0);
-+#endif
-+ clear_inode(inode);
-+}
-+#endif
-+
-+
-+
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-+static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf)
-+{
-+ struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev;
-+ struct super_block *sb = dentry->d_sb;
-+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf)
-+{
-+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
-+#else
-+static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
-+{
-+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
-+#endif
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_statfs");
-+
-+ yaffs_gross_lock(dev);
-+
-+ buf->f_type = YAFFS_MAGIC;
-+ buf->f_bsize = sb->s_blocksize;
-+ buf->f_namelen = 255;
-+
-+ if (dev->data_bytes_per_chunk & (dev->data_bytes_per_chunk - 1)) {
-+ /* Do this if chunk size is not a power of 2 */
-+
-+ uint64_t bytes_in_dev;
-+ uint64_t bytes_free;
-+
-+ bytes_in_dev =
-+ ((uint64_t)
-+ ((dev->param.end_block - dev->param.start_block +
-+ 1))) * ((uint64_t) (dev->param.chunks_per_block *
-+ dev->data_bytes_per_chunk));
-+
-+ do_div(bytes_in_dev, sb->s_blocksize); /* bytes_in_dev becomes the number of blocks */
-+ buf->f_blocks = bytes_in_dev;
-+
-+ bytes_free = ((uint64_t) (yaffs_get_n_free_chunks(dev))) *
-+ ((uint64_t) (dev->data_bytes_per_chunk));
-+
-+ do_div(bytes_free, sb->s_blocksize);
-+
-+ buf->f_bfree = bytes_free;
-+
-+ } else if (sb->s_blocksize > dev->data_bytes_per_chunk) {
-+
-+ buf->f_blocks =
-+ (dev->param.end_block - dev->param.start_block + 1) *
-+ dev->param.chunks_per_block /
-+ (sb->s_blocksize / dev->data_bytes_per_chunk);
-+ buf->f_bfree =
-+ yaffs_get_n_free_chunks(dev) /
-+ (sb->s_blocksize / dev->data_bytes_per_chunk);
-+ } else {
-+ buf->f_blocks =
-+ (dev->param.end_block - dev->param.start_block + 1) *
-+ dev->param.chunks_per_block *
-+ (dev->data_bytes_per_chunk / sb->s_blocksize);
-+
-+ buf->f_bfree =
-+ yaffs_get_n_free_chunks(dev) *
-+ (dev->data_bytes_per_chunk / sb->s_blocksize);
-+ }
-+
-+ buf->f_files = 0;
-+ buf->f_ffree = 0;
-+ buf->f_bavail = buf->f_bfree;
-+
-+ yaffs_gross_unlock(dev);
-+ return 0;
-+}
-+
-+
-+
-+static int yaffs_do_sync_fs(struct super_block *sb, int request_checkpoint)
-+{
-+
-+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
-+ unsigned int oneshot_checkpoint = (yaffs_auto_checkpoint & 4);
-+ unsigned gc_urgent = yaffs_bg_gc_urgency(dev);
-+ int do_checkpoint;
-+ int dirty = yaffs_check_super_dirty(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND,
-+ "yaffs_do_sync_fs: gc-urgency %d %s %s%s",
-+ gc_urgent,
-+ dirty ? "dirty" : "clean",
-+ request_checkpoint ? "checkpoint requested" : "no checkpoint",
-+ oneshot_checkpoint ? " one-shot" : "");
-+
-+ yaffs_gross_lock(dev);
-+ do_checkpoint = ((request_checkpoint && !gc_urgent) ||
-+ oneshot_checkpoint) && !dev->is_checkpointed;
-+
-+ if (dirty || do_checkpoint) {
-+ yaffs_flush_super(sb, !dev->is_checkpointed && do_checkpoint);
-+ yaffs_clear_super_dirty(dev);
-+ if (oneshot_checkpoint)
-+ yaffs_auto_checkpoint &= ~4;
-+ }
-+ yaffs_gross_unlock(dev);
-+
-+ return 0;
-+}
-+
-+
-+#ifdef YAFFS_HAS_WRITE_SUPER
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-+static void yaffs_write_super(struct super_block *sb)
-+#else
-+static int yaffs_write_super(struct super_block *sb)
-+#endif
-+{
-+ unsigned request_checkpoint = (yaffs_auto_checkpoint >= 2);
-+
-+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND,
-+ "yaffs_write_super %s",
-+ request_checkpoint ? " checkpt" : "");
-+
-+ yaffs_do_sync_fs(sb, request_checkpoint);
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 18))
-+ return 0;
-+#endif
-+}
-+#endif
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-+static int yaffs_sync_fs(struct super_block *sb, int wait)
-+#else
-+static int yaffs_sync_fs(struct super_block *sb)
-+#endif
-+{
-+ unsigned request_checkpoint = (yaffs_auto_checkpoint >= 1);
-+
-+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC,
-+ "yaffs_sync_fs%s", request_checkpoint ? " checkpt" : "");
-+
-+ yaffs_do_sync_fs(sb, request_checkpoint);
-+
-+ return 0;
-+}
-+
-+
-+
-+static const struct super_operations yaffs_super_ops = {
-+ .statfs = yaffs_statfs,
-+
-+#ifndef YAFFS_USE_OWN_IGET
-+ .read_inode = yaffs_read_inode,
-+#endif
-+#ifdef YAFFS_HAS_PUT_INODE
-+ .put_inode = yaffs_put_inode,
-+#endif
-+ .put_super = yaffs_put_super,
-+#ifdef YAFFS_HAS_EVICT_INODE
-+ .evict_inode = yaffs_evict_inode,
-+#else
-+ .delete_inode = yaffs_delete_inode,
-+ .clear_inode = yaffs_clear_inode,
-+#endif
-+ .sync_fs = yaffs_sync_fs,
-+#ifdef YAFFS_HAS_WRITE_SUPER
-+ .write_super = yaffs_write_super,
-+#endif
-+};
-+
-+struct yaffs_options {
-+ int inband_tags;
-+ int skip_checkpoint_read;
-+ int skip_checkpoint_write;
-+ int no_cache;
-+ int tags_ecc_on;
-+ int tags_ecc_overridden;
-+ int lazy_loading_enabled;
-+ int lazy_loading_overridden;
-+ int empty_lost_and_found;
-+ int empty_lost_and_found_overridden;
-+ int disable_summary;
-+};
-+
-+#define MAX_OPT_LEN 30
-+static int yaffs_parse_options(struct yaffs_options *options,
-+ const char *options_str)
-+{
-+ char cur_opt[MAX_OPT_LEN + 1];
-+ int p;
-+ int error = 0;
-+
-+ /* Parse through the options which is a comma seperated list */
-+
-+ while (options_str && *options_str && !error) {
-+ memset(cur_opt, 0, MAX_OPT_LEN + 1);
-+ p = 0;
-+
-+ while (*options_str == ',')
-+ options_str++;
-+
-+ while (*options_str && *options_str != ',') {
-+ if (p < MAX_OPT_LEN) {
-+ cur_opt[p] = *options_str;
-+ p++;
-+ }
-+ options_str++;
-+ }
-+
-+ if (!strcmp(cur_opt, "inband-tags")) {
-+ options->inband_tags = 1;
-+ } else if (!strcmp(cur_opt, "tags-ecc-off")) {
-+ options->tags_ecc_on = 0;
-+ options->tags_ecc_overridden = 1;
-+ } else if (!strcmp(cur_opt, "tags-ecc-on")) {
-+ options->tags_ecc_on = 1;
-+ options->tags_ecc_overridden = 1;
-+ } else if (!strcmp(cur_opt, "lazy-loading-off")) {
-+ options->lazy_loading_enabled = 0;
-+ options->lazy_loading_overridden = 1;
-+ } else if (!strcmp(cur_opt, "lazy-loading-on")) {
-+ options->lazy_loading_enabled = 1;
-+ options->lazy_loading_overridden = 1;
-+ } else if (!strcmp(cur_opt, "disable-summary")) {
-+ options->disable_summary = 1;
-+ } else if (!strcmp(cur_opt, "empty-lost-and-found-off")) {
-+ options->empty_lost_and_found = 0;
-+ options->empty_lost_and_found_overridden = 1;
-+ } else if (!strcmp(cur_opt, "empty-lost-and-found-on")) {
-+ options->empty_lost_and_found = 1;
-+ options->empty_lost_and_found_overridden = 1;
-+ } else if (!strcmp(cur_opt, "no-cache")) {
-+ options->no_cache = 1;
-+ } else if (!strcmp(cur_opt, "no-checkpoint-read")) {
-+ options->skip_checkpoint_read = 1;
-+ } else if (!strcmp(cur_opt, "no-checkpoint-write")) {
-+ options->skip_checkpoint_write = 1;
-+ } else if (!strcmp(cur_opt, "no-checkpoint")) {
-+ options->skip_checkpoint_read = 1;
-+ options->skip_checkpoint_write = 1;
-+ } else {
-+ printk(KERN_INFO "yaffs: Bad mount option \"%s\"\n",
-+ cur_opt);
-+ error = 1;
-+ }
-+ }
-+
-+ return error;
-+}
-+
-+
-+static struct dentry *yaffs_make_root(struct inode *inode)
-+{
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 4, 0))
-+ struct dentry *root = d_alloc_root(inode);
-+
-+ if (!root)
-+ iput(inode);
-+
-+ return root;
-+#else
-+ return d_make_root(inode);
-+#endif
-+}
-+
-+
-+
-+
-+static struct super_block *yaffs_internal_read_super(int yaffs_version,
-+ struct super_block *sb,
-+ void *data, int silent)
-+{
-+ int n_blocks;
-+ struct inode *inode = NULL;
-+ struct dentry *root;
-+ struct yaffs_dev *dev = 0;
-+ char devname_buf[BDEVNAME_SIZE + 1];
-+ struct mtd_info *mtd;
-+ int err;
-+ char *data_str = (char *)data;
-+ struct yaffs_linux_context *context = NULL;
-+ struct yaffs_param *param;
-+
-+ int read_only = 0;
-+ int inband_tags = 0;
-+
-+ struct yaffs_options options;
-+
-+ unsigned mount_id;
-+ int found;
-+ struct yaffs_linux_context *context_iterator;
-+ struct list_head *l;
-+
-+ if (!sb) {
-+ printk(KERN_INFO "yaffs: sb is NULL\n");
-+ return NULL;
-+ }
-+
-+ sb->s_magic = YAFFS_MAGIC;
-+ sb->s_op = &yaffs_super_ops;
-+ sb->s_flags |= MS_NOATIME;
-+
-+ read_only = ((sb->s_flags & MS_RDONLY) != 0);
-+
-+#ifdef YAFFS_COMPILE_EXPORTFS
-+ sb->s_export_op = &yaffs_export_ops;
-+#endif
-+
-+ if (!sb->s_dev)
-+ printk(KERN_INFO "yaffs: sb->s_dev is NULL\n");
-+ else if (!yaffs_devname(sb, devname_buf))
-+ printk(KERN_INFO "yaffs: devname is NULL\n");
-+ else
-+ printk(KERN_INFO "yaffs: dev is %d name is \"%s\" %s\n",
-+ sb->s_dev,
-+ yaffs_devname(sb, devname_buf), read_only ? "ro" : "rw");
-+
-+ if (!data_str)
-+ data_str = "";
-+
-+ printk(KERN_INFO "yaffs: passed flags \"%s\"\n", data_str);
-+
-+ memset(&options, 0, sizeof(options));
-+
-+ if (yaffs_parse_options(&options, data_str)) {
-+ /* Option parsing failed */
-+ return NULL;
-+ }
-+
-+ sb->s_blocksize = PAGE_CACHE_SIZE;
-+ sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_read_super: Using yaffs%d", yaffs_version);
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_read_super: block size %d", (int)(sb->s_blocksize));
-+
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs: Attempting MTD mount of %u.%u,\"%s\"",
-+ MAJOR(sb->s_dev), MINOR(sb->s_dev),
-+ yaffs_devname(sb, devname_buf));
-+
-+ /* Get the device */
-+ mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
-+ if (IS_ERR(mtd)) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs: MTD device %u either not valid or unavailable",
-+ MINOR(sb->s_dev));
-+ return NULL;
-+ }
-+
-+ if (yaffs_auto_select && yaffs_version == 1 && WRITE_SIZE(mtd) >= 2048) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "auto selecting yaffs2");
-+ yaffs_version = 2;
-+ }
-+
-+ /* Added NCB 26/5/2006 for completeness */
-+ if (yaffs_version == 2 && !options.inband_tags
-+ && WRITE_SIZE(mtd) == 512) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "auto selecting yaffs1");
-+ yaffs_version = 1;
-+ }
-+
-+ if (mtd->oobavail < sizeof(struct yaffs_packed_tags2) ||
-+ options.inband_tags)
-+ inband_tags = 1;
-+
-+ if(yaffs_verify_mtd(mtd, yaffs_version, inband_tags) < 0)
-+ return NULL;
-+
-+ /* OK, so if we got here, we have an MTD that's NAND and looks
-+ * like it has the right capabilities
-+ * Set the struct yaffs_dev up for mtd
-+ */
-+
-+ if (!read_only && !(mtd->flags & MTD_WRITEABLE)) {
-+ read_only = 1;
-+ printk(KERN_INFO
-+ "yaffs: mtd is read only, setting superblock read only\n"
-+ );
-+ sb->s_flags |= MS_RDONLY;
-+ }
-+
-+ dev = kmalloc(sizeof(struct yaffs_dev), GFP_KERNEL);
-+ context = kmalloc(sizeof(struct yaffs_linux_context), GFP_KERNEL);
-+
-+ if (!dev || !context) {
-+ kfree(dev);
-+ kfree(context);
-+ dev = NULL;
-+ context = NULL;
-+
-+ /* Deep shit could not allocate device structure */
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs_read_super: Failed trying to allocate struct yaffs_dev."
-+ );
-+ return NULL;
-+ }
-+ memset(dev, 0, sizeof(struct yaffs_dev));
-+ param = &(dev->param);
-+
-+ memset(context, 0, sizeof(struct yaffs_linux_context));
-+ dev->os_context = context;
-+ INIT_LIST_HEAD(&(context->context_list));
-+ context->dev = dev;
-+ context->super = sb;
-+
-+ dev->read_only = read_only;
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+ sb->s_fs_info = dev;
-+#else
-+ sb->u.generic_sbp = dev;
-+#endif
-+
-+
-+ dev->driver_context = mtd;
-+ param->name = mtd->name;
-+
-+ /* Set up the memory size parameters.... */
-+
-+
-+ param->n_reserved_blocks = 5;
-+ param->n_caches = (options.no_cache) ? 0 : 10;
-+ param->inband_tags = inband_tags;
-+
-+ param->enable_xattr = 1;
-+ if (options.lazy_loading_overridden)
-+ param->disable_lazy_load = !options.lazy_loading_enabled;
-+
-+ param->defered_dir_update = 1;
-+
-+ if (options.tags_ecc_overridden)
-+ param->no_tags_ecc = !options.tags_ecc_on;
-+
-+ param->empty_lost_n_found = 1;
-+ param->refresh_period = 500;
-+ param->disable_summary = options.disable_summary;
-+
-+
-+#ifdef CONFIG_YAFFS_DISABLE_BAD_BLOCK_MARKING
-+ param->disable_bad_block_marking = 1;
-+#endif
-+ if (options.empty_lost_and_found_overridden)
-+ param->empty_lost_n_found = options.empty_lost_and_found;
-+
-+ /* ... and the functions. */
-+ if (yaffs_version == 2) {
-+ param->is_yaffs2 = 1;
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-+ param->total_bytes_per_chunk = mtd->writesize;
-+ param->chunks_per_block = mtd->erasesize / mtd->writesize;
-+#else
-+ param->total_bytes_per_chunk = mtd->oobblock;
-+ param->chunks_per_block = mtd->erasesize / mtd->oobblock;
-+#endif
-+ n_blocks = YCALCBLOCKS(mtd->size, mtd->erasesize);
-+
-+ param->start_block = 0;
-+ param->end_block = n_blocks - 1;
-+ } else {
-+ param->is_yaffs2 = 0;
-+ n_blocks = YCALCBLOCKS(mtd->size,
-+ YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK);
-+
-+ param->chunks_per_block = YAFFS_CHUNKS_PER_BLOCK;
-+ param->total_bytes_per_chunk = YAFFS_BYTES_PER_CHUNK;
-+ }
-+
-+ param->start_block = 0;
-+ param->end_block = n_blocks - 1;
-+
-+ yaffs_mtd_drv_install(dev);
-+
-+ param->sb_dirty_fn = yaffs_set_super_dirty;
-+ param->gc_control_fn = yaffs_gc_control_callback;
-+
-+ yaffs_dev_to_lc(dev)->super = sb;
-+
-+ param->use_nand_ecc = 1;
-+
-+ param->skip_checkpt_rd = options.skip_checkpoint_read;
-+ param->skip_checkpt_wr = options.skip_checkpoint_write;
-+
-+ mutex_lock(&yaffs_context_lock);
-+ /* Get a mount id */
-+ found = 0;
-+ for (mount_id = 0; !found; mount_id++) {
-+ found = 1;
-+ list_for_each(l, &yaffs_context_list) {
-+ context_iterator =
-+ list_entry(l, struct yaffs_linux_context,
-+ context_list);
-+ if (context_iterator->mount_id == mount_id)
-+ found = 0;
-+ }
-+ }
-+ context->mount_id = mount_id;
-+
-+ list_add_tail(&(yaffs_dev_to_lc(dev)->context_list),
-+ &yaffs_context_list);
-+ mutex_unlock(&yaffs_context_lock);
-+
-+ /* Directory search handling... */
-+ INIT_LIST_HEAD(&(yaffs_dev_to_lc(dev)->search_contexts));
-+ param->remove_obj_fn = yaffs_remove_obj_callback;
-+
-+ mutex_init(&(yaffs_dev_to_lc(dev)->gross_lock));
-+
-+ yaffs_gross_lock(dev);
-+
-+ err = yaffs_guts_initialise(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_read_super: guts initialised %s",
-+ (err == YAFFS_OK) ? "OK" : "FAILED");
-+
-+ if (err == YAFFS_OK)
-+ yaffs_bg_start(dev);
-+
-+ if (!context->bg_thread)
-+ param->defered_dir_update = 0;
-+
-+ sb->s_maxbytes = yaffs_max_file_size(dev);
-+
-+ /* Release lock before yaffs_get_inode() */
-+ yaffs_gross_unlock(dev);
-+
-+ /* Create root inode */
-+ if (err == YAFFS_OK)
-+ inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0, yaffs_root(dev));
-+
-+ if (!inode)
-+ return NULL;
-+
-+ inode->i_op = &yaffs_dir_inode_operations;
-+ inode->i_fop = &yaffs_dir_operations;
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_read_super: got root inode");
-+
-+ root = yaffs_make_root(inode);
-+
-+ if (!root)
-+ return NULL;
-+
-+ sb->s_root = root;
-+ if(!dev->is_checkpointed)
-+ yaffs_set_super_dirty(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs_read_super: is_checkpointed %d",
-+ dev->is_checkpointed);
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_read_super: done");
-+ return sb;
-+}
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+static int yaffs_internal_read_super_mtd(struct super_block *sb, void *data,
-+ int silent)
-+{
-+ return yaffs_internal_read_super(1, sb, data, silent) ? 0 : -EINVAL;
-+}
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
-+static struct dentry *yaffs_mount(struct file_system_type *fs_type, int flags,
-+ const char *dev_name, void *data)
-+{
-+ return mount_bdev(fs_type, flags, dev_name, data, yaffs_internal_read_super_mtd);
-+}
-+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-+static int yaffs_read_super(struct file_system_type *fs,
-+ int flags, const char *dev_name,
-+ void *data, struct vfsmount *mnt)
-+{
-+
-+ return get_sb_bdev(fs, flags, dev_name, data,
-+ yaffs_internal_read_super_mtd, mnt);
-+}
-+#else
-+static struct super_block *yaffs_read_super(struct file_system_type *fs,
-+ int flags, const char *dev_name,
-+ void *data)
-+{
-+
-+ return get_sb_bdev(fs, flags, dev_name, data,
-+ yaffs_internal_read_super_mtd);
-+}
-+#endif
-+
-+static struct file_system_type yaffs_fs_type = {
-+ .owner = THIS_MODULE,
-+ .name = "yaffs",
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
-+ .mount = yaffs_mount,
-+#else
-+ .get_sb = yaffs_read_super,
-+#endif
-+ .kill_sb = kill_block_super,
-+ .fs_flags = FS_REQUIRES_DEV,
-+};
-+#else
-+static struct super_block *yaffs_read_super(struct super_block *sb, void *data,
-+ int silent)
-+{
-+ return yaffs_internal_read_super(1, sb, data, silent);
-+}
-+
-+static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super,
-+ FS_REQUIRES_DEV);
-+#endif
-+
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+static int yaffs2_internal_read_super_mtd(struct super_block *sb, void *data,
-+ int silent)
-+{
-+ return yaffs_internal_read_super(2, sb, data, silent) ? 0 : -EINVAL;
-+}
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
-+static struct dentry *yaffs2_mount(struct file_system_type *fs_type, int flags,
-+ const char *dev_name, void *data)
-+{
-+ return mount_bdev(fs_type, flags, dev_name, data, yaffs2_internal_read_super_mtd);
-+}
-+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-+static int yaffs2_read_super(struct file_system_type *fs,
-+ int flags, const char *dev_name, void *data,
-+ struct vfsmount *mnt)
-+{
-+ return get_sb_bdev(fs, flags, dev_name, data,
-+ yaffs2_internal_read_super_mtd, mnt);
-+}
-+#else
-+static struct super_block *yaffs2_read_super(struct file_system_type *fs,
-+ int flags, const char *dev_name,
-+ void *data)
-+{
-+
-+ return get_sb_bdev(fs, flags, dev_name, data,
-+ yaffs2_internal_read_super_mtd);
-+}
-+#endif
-+
-+static struct file_system_type yaffs2_fs_type = {
-+ .owner = THIS_MODULE,
-+ .name = "yaffs2",
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
-+ .mount = yaffs2_mount,
-+#else
-+ .get_sb = yaffs2_read_super,
-+#endif
-+ .kill_sb = kill_block_super,
-+ .fs_flags = FS_REQUIRES_DEV,
-+};
-+#else
-+static struct super_block *yaffs2_read_super(struct super_block *sb,
-+ void *data, int silent)
-+{
-+ return yaffs_internal_read_super(2, sb, data, silent);
-+}
-+
-+static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super,
-+ FS_REQUIRES_DEV);
-+#endif
-+
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 9, 0))
-+static struct proc_dir_entry *my_proc_entry;
-+
-+static char *yaffs_dump_dev_part0(char *buf, struct yaffs_dev *dev)
-+{
-+ struct yaffs_param *param = &dev->param;
-+ int bs[10];
-+
-+ yaffs_count_blocks_by_state(dev,bs);
-+
-+ buf += sprintf(buf, "start_block.......... %d\n", param->start_block);
-+ buf += sprintf(buf, "end_block............ %d\n", param->end_block);
-+ buf += sprintf(buf, "total_bytes_per_chunk %d\n",
-+ param->total_bytes_per_chunk);
-+ buf += sprintf(buf, "use_nand_ecc......... %d\n", param->use_nand_ecc);
-+ buf += sprintf(buf, "no_tags_ecc.......... %d\n", param->no_tags_ecc);
-+ buf += sprintf(buf, "is_yaffs2............ %d\n", param->is_yaffs2);
-+ buf += sprintf(buf, "inband_tags.......... %d\n", param->inband_tags);
-+ buf += sprintf(buf, "empty_lost_n_found... %d\n",
-+ param->empty_lost_n_found);
-+ buf += sprintf(buf, "disable_lazy_load.... %d\n",
-+ param->disable_lazy_load);
-+ buf += sprintf(buf, "disable_bad_block_mrk %d\n",
-+ param->disable_bad_block_marking);
-+ buf += sprintf(buf, "refresh_period....... %d\n",
-+ param->refresh_period);
-+ buf += sprintf(buf, "n_caches............. %d\n", param->n_caches);
-+ buf += sprintf(buf, "n_reserved_blocks.... %d\n",
-+ param->n_reserved_blocks);
-+ buf += sprintf(buf, "always_check_erased.. %d\n",
-+ param->always_check_erased);
-+ buf += sprintf(buf, "\n");
-+ buf += sprintf(buf, "block count by state\n");
-+ buf += sprintf(buf, "0:%d 1:%d 2:%d 3:%d 4:%d\n",
-+ bs[0], bs[1], bs[2], bs[3], bs[4]);
-+ buf += sprintf(buf, "5:%d 6:%d 7:%d 8:%d 9:%d\n",
-+ bs[5], bs[6], bs[7], bs[8], bs[9]);
-+
-+ return buf;
-+}
-+
-+static char *yaffs_dump_dev_part1(char *buf, struct yaffs_dev *dev)
-+{
-+ buf += sprintf(buf, "max file size....... %lld\n",
-+ (long long) yaffs_max_file_size(dev));
-+ buf += sprintf(buf, "data_bytes_per_chunk. %d\n",
-+ dev->data_bytes_per_chunk);
-+ buf += sprintf(buf, "chunk_grp_bits....... %d\n", dev->chunk_grp_bits);
-+ buf += sprintf(buf, "chunk_grp_size....... %d\n", dev->chunk_grp_size);
-+ buf += sprintf(buf, "n_erased_blocks...... %d\n", dev->n_erased_blocks);
-+ buf += sprintf(buf, "blocks_in_checkpt.... %d\n",
-+ dev->blocks_in_checkpt);
-+ buf += sprintf(buf, "\n");
-+ buf += sprintf(buf, "n_tnodes............. %d\n", dev->n_tnodes);
-+ buf += sprintf(buf, "n_obj................ %d\n", dev->n_obj);
-+ buf += sprintf(buf, "n_free_chunks........ %d\n", dev->n_free_chunks);
-+ buf += sprintf(buf, "\n");
-+ buf += sprintf(buf, "n_page_writes........ %u\n", dev->n_page_writes);
-+ buf += sprintf(buf, "n_page_reads......... %u\n", dev->n_page_reads);
-+ buf += sprintf(buf, "n_erasures........... %u\n", dev->n_erasures);
-+ buf += sprintf(buf, "n_gc_copies.......... %u\n", dev->n_gc_copies);
-+ buf += sprintf(buf, "all_gcs.............. %u\n", dev->all_gcs);
-+ buf += sprintf(buf, "passive_gc_count..... %u\n",
-+ dev->passive_gc_count);
-+ buf += sprintf(buf, "oldest_dirty_gc_count %u\n",
-+ dev->oldest_dirty_gc_count);
-+ buf += sprintf(buf, "n_gc_blocks.......... %u\n", dev->n_gc_blocks);
-+ buf += sprintf(buf, "bg_gcs............... %u\n", dev->bg_gcs);
-+ buf += sprintf(buf, "n_retried_writes..... %u\n",
-+ dev->n_retried_writes);
-+ buf += sprintf(buf, "n_retired_blocks..... %u\n",
-+ dev->n_retired_blocks);
-+ buf += sprintf(buf, "n_ecc_fixed.......... %u\n", dev->n_ecc_fixed);
-+ buf += sprintf(buf, "n_ecc_unfixed........ %u\n", dev->n_ecc_unfixed);
-+ buf += sprintf(buf, "n_tags_ecc_fixed..... %u\n",
-+ dev->n_tags_ecc_fixed);
-+ buf += sprintf(buf, "n_tags_ecc_unfixed... %u\n",
-+ dev->n_tags_ecc_unfixed);
-+ buf += sprintf(buf, "cache_hits........... %u\n", dev->cache_hits);
-+ buf += sprintf(buf, "n_deleted_files...... %u\n", dev->n_deleted_files);
-+ buf += sprintf(buf, "n_unlinked_files..... %u\n",
-+ dev->n_unlinked_files);
-+ buf += sprintf(buf, "refresh_count........ %u\n", dev->refresh_count);
-+ buf += sprintf(buf, "n_bg_deletions....... %u\n", dev->n_bg_deletions);
-+ buf += sprintf(buf, "tags_used............ %u\n", dev->tags_used);
-+ buf += sprintf(buf, "summary_used......... %u\n", dev->summary_used);
-+
-+ return buf;
-+}
-+
-+static int yaffs_proc_read(char *page,
-+ char **start,
-+ off_t offset, int count, int *eof, void *data)
-+{
-+ struct list_head *item;
-+ char *buf = page;
-+ int step = offset;
-+ int n = 0;
-+
-+ /* Get proc_file_read() to step 'offset' by one on each sucessive call.
-+ * We use 'offset' (*ppos) to indicate where we are in dev_list.
-+ * This also assumes the user has posted a read buffer large
-+ * enough to hold the complete output; but that's life in /proc.
-+ */
-+
-+ *(int *)start = 1;
-+
-+ /* Print header first */
-+ if (step == 0)
-+ buf +=
-+ sprintf(buf,
-+ "Multi-version YAFFS built:" __DATE__ " " __TIME__
-+ "\n");
-+ else if (step == 1)
-+ buf += sprintf(buf, "\n");
-+ else {
-+ step -= 2;
-+
-+ mutex_lock(&yaffs_context_lock);
-+
-+ /* Locate and print the Nth entry. Order N-squared but N is small. */
-+ list_for_each(item, &yaffs_context_list) {
-+ struct yaffs_linux_context *dc =
-+ list_entry(item, struct yaffs_linux_context,
-+ context_list);
-+ struct yaffs_dev *dev = dc->dev;
-+
-+ if (n < (step & ~1)) {
-+ n += 2;
-+ continue;
-+ }
-+ if ((step & 1) == 0) {
-+ buf +=
-+ sprintf(buf, "\nDevice %d \"%s\"\n", n,
-+ dev->param.name);
-+ buf = yaffs_dump_dev_part0(buf, dev);
-+ } else {
-+ buf = yaffs_dump_dev_part1(buf, dev);
-+ }
-+
-+ break;
-+ }
-+ mutex_unlock(&yaffs_context_lock);
-+ }
-+
-+ return buf - page < count ? buf - page : count;
-+}
-+
-+/**
-+ * Set the verbosity of the warnings and error messages.
-+ *
-+ * Note that the names can only be a..z or _ with the current code.
-+ */
-+
-+static struct {
-+ char *mask_name;
-+ unsigned mask_bitfield;
-+} mask_flags[] = {
-+ {"allocate", YAFFS_TRACE_ALLOCATE},
-+ {"always", YAFFS_TRACE_ALWAYS},
-+ {"background", YAFFS_TRACE_BACKGROUND},
-+ {"bad_blocks", YAFFS_TRACE_BAD_BLOCKS},
-+ {"buffers", YAFFS_TRACE_BUFFERS},
-+ {"bug", YAFFS_TRACE_BUG},
-+ {"checkpt", YAFFS_TRACE_CHECKPOINT},
-+ {"deletion", YAFFS_TRACE_DELETION},
-+ {"erase", YAFFS_TRACE_ERASE},
-+ {"error", YAFFS_TRACE_ERROR},
-+ {"gc_detail", YAFFS_TRACE_GC_DETAIL},
-+ {"gc", YAFFS_TRACE_GC},
-+ {"lock", YAFFS_TRACE_LOCK},
-+ {"mtd", YAFFS_TRACE_MTD},
-+ {"nandaccess", YAFFS_TRACE_NANDACCESS},
-+ {"os", YAFFS_TRACE_OS},
-+ {"scan_debug", YAFFS_TRACE_SCAN_DEBUG},
-+ {"scan", YAFFS_TRACE_SCAN},
-+ {"mount", YAFFS_TRACE_MOUNT},
-+ {"tracing", YAFFS_TRACE_TRACING},
-+ {"sync", YAFFS_TRACE_SYNC},
-+ {"write", YAFFS_TRACE_WRITE},
-+ {"verify", YAFFS_TRACE_VERIFY},
-+ {"verify_nand", YAFFS_TRACE_VERIFY_NAND},
-+ {"verify_full", YAFFS_TRACE_VERIFY_FULL},
-+ {"verify_all", YAFFS_TRACE_VERIFY_ALL},
-+ {"all", 0xffffffff},
-+ {"none", 0},
-+ {NULL, 0},
-+};
-+
-+#define MAX_MASK_NAME_LENGTH 40
-+static int yaffs_proc_write_trace_options(struct file *file, const char *buf,
-+ unsigned long count, void *data)
-+{
-+ unsigned rg = 0, mask_bitfield;
-+ char *end;
-+ char *mask_name;
-+ const char *x;
-+ char substring[MAX_MASK_NAME_LENGTH + 1];
-+ int i;
-+ int done = 0;
-+ int add, len = 0;
-+ int pos = 0;
-+
-+ rg = yaffs_trace_mask;
-+
-+ while (!done && (pos < count)) {
-+ done = 1;
-+ while ((pos < count) && isspace(buf[pos]))
-+ pos++;
-+
-+ switch (buf[pos]) {
-+ case '+':
-+ case '-':
-+ case '=':
-+ add = buf[pos];
-+ pos++;
-+ break;
-+
-+ default:
-+ add = ' ';
-+ break;
-+ }
-+ mask_name = NULL;
-+
-+ mask_bitfield = simple_strtoul(buf + pos, &end, 0);
-+
-+ if (end > buf + pos) {
-+ mask_name = "numeral";
-+ len = end - (buf + pos);
-+ pos += len;
-+ done = 0;
-+ } else {
-+ for (x = buf + pos, i = 0;
-+ (*x == '_' || (*x >= 'a' && *x <= 'z')) &&
-+ i < MAX_MASK_NAME_LENGTH; x++, i++, pos++)
-+ substring[i] = *x;
-+ substring[i] = '\0';
-+
-+ for (i = 0; mask_flags[i].mask_name != NULL; i++) {
-+ if (strcmp(substring, mask_flags[i].mask_name)
-+ == 0) {
-+ mask_name = mask_flags[i].mask_name;
-+ mask_bitfield =
-+ mask_flags[i].mask_bitfield;
-+ done = 0;
-+ break;
-+ }
-+ }
-+ }
-+
-+ if (mask_name != NULL) {
-+ done = 0;
-+ switch (add) {
-+ case '-':
-+ rg &= ~mask_bitfield;
-+ break;
-+ case '+':
-+ rg |= mask_bitfield;
-+ break;
-+ case '=':
-+ rg = mask_bitfield;
-+ break;
-+ default:
-+ rg |= mask_bitfield;
-+ break;
-+ }
-+ }
-+ }
-+
-+ yaffs_trace_mask = rg | YAFFS_TRACE_ALWAYS;
-+
-+ printk(KERN_DEBUG "new trace = 0x%08X\n", yaffs_trace_mask);
-+
-+ if (rg & YAFFS_TRACE_ALWAYS) {
-+ for (i = 0; mask_flags[i].mask_name != NULL; i++) {
-+ char flag;
-+ flag = ((rg & mask_flags[i].mask_bitfield) ==
-+ mask_flags[i].mask_bitfield) ? '+' : '-';
-+ printk(KERN_DEBUG "%c%s\n", flag,
-+ mask_flags[i].mask_name);
-+ }
-+ }
-+
-+ return count;
-+}
-+
-+/* Debug strings are of the form:
-+ * .bnnn print info on block n
-+ * .cobjn,chunkn print nand chunk id for objn:chunkn
-+ */
-+
-+static int yaffs_proc_debug_write(struct file *file, const char *buf,
-+ unsigned long count, void *data)
-+{
-+
-+ char str[100];
-+ char *p0;
-+ char *p1;
-+ long p1_val;
-+ long p0_val;
-+ char cmd;
-+ struct list_head *item;
-+
-+ memset(str, 0, sizeof(str));
-+ memcpy(str, buf, min(count, sizeof(str) -1));
-+
-+ cmd = str[1];
-+
-+ p0 = str + 2;
-+
-+ p1 = p0;
-+
-+ while (*p1 && *p1 != ',') {
-+ p1++;
-+ }
-+ *p1 = '\0';
-+ p1++;
-+
-+ p0_val = simple_strtol(p0, NULL, 0);
-+ p1_val = simple_strtol(p1, NULL, 0);
-+
-+
-+ mutex_lock(&yaffs_context_lock);
-+
-+ /* Locate and print the Nth entry. Order N-squared but N is small. */
-+ list_for_each(item, &yaffs_context_list) {
-+ struct yaffs_linux_context *dc =
-+ list_entry(item, struct yaffs_linux_context,
-+ context_list);
-+ struct yaffs_dev *dev = dc->dev;
-+
-+ if (cmd == 'b') {
-+ struct yaffs_block_info *bi;
-+
-+ bi = yaffs_get_block_info(dev,p0_val);
-+
-+ if(bi) {
-+ printk("Block %d: state %d, retire %d, use %d, seq %d\n",
-+ (int)p0_val, bi->block_state,
-+ bi->needs_retiring, bi->pages_in_use,
-+ bi->seq_number);
-+ }
-+ } else if (cmd == 'c') {
-+ struct yaffs_obj *obj;
-+ int nand_chunk;
-+
-+ obj = yaffs_find_by_number(dev, p0_val);
-+ if (!obj)
-+ printk("No obj %d\n", (int)p0_val);
-+ else {
-+ if(p1_val == 0)
-+ nand_chunk = obj->hdr_chunk;
-+ else
-+ nand_chunk =
-+ yaffs_find_chunk_in_file(obj,
-+ p1_val, NULL);
-+ printk("Nand chunk for %d:%d is %d\n",
-+ (int)p0_val, (int)p1_val, nand_chunk);
-+ }
-+ }
-+ }
-+
-+ mutex_unlock(&yaffs_context_lock);
-+
-+ return count;
-+}
-+
-+static int yaffs_proc_write(struct file *file, const char *buf,
-+ unsigned long count, void *data)
-+{
-+ if (buf[0] == '.')
-+ return yaffs_proc_debug_write(file, buf, count, data);
-+ return yaffs_proc_write_trace_options(file, buf, count, data);
-+}
-+#endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(3, 9, 0)) */
-+
-+/* Stuff to handle installation of file systems */
-+struct file_system_to_install {
-+ struct file_system_type *fst;
-+ int installed;
-+};
-+
-+static struct file_system_to_install fs_to_install[] = {
-+ {&yaffs_fs_type, 0},
-+ {&yaffs2_fs_type, 0},
-+ {NULL, 0}
-+};
-+
-+static int __init init_yaffs_fs(void)
-+{
-+ int error = 0;
-+ struct file_system_to_install *fsinst;
-+
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs built " __DATE__ " " __TIME__ " Installing.");
-+
-+ mutex_init(&yaffs_context_lock);
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 9, 0))
-+ /* Install the proc_fs entries */
-+ my_proc_entry = create_proc_entry("yaffs",
-+ S_IRUGO | S_IFREG, YPROC_ROOT);
-+
-+ if (my_proc_entry) {
-+ my_proc_entry->write_proc = yaffs_proc_write;
-+ my_proc_entry->read_proc = yaffs_proc_read;
-+ my_proc_entry->data = NULL;
-+ } else {
-+ return -ENOMEM;
-+ }
-+#endif
-+
-+ /* Now add the file system entries */
-+
-+ fsinst = fs_to_install;
-+
-+ while (fsinst->fst && !error) {
-+ error = register_filesystem(fsinst->fst);
-+ if (!error)
-+ fsinst->installed = 1;
-+ fsinst++;
-+ }
-+
-+ /* Any errors? uninstall */
-+ if (error) {
-+ fsinst = fs_to_install;
-+
-+ while (fsinst->fst) {
-+ if (fsinst->installed) {
-+ unregister_filesystem(fsinst->fst);
-+ fsinst->installed = 0;
-+ }
-+ fsinst++;
-+ }
-+ }
-+
-+ return error;
-+}
-+
-+static void __exit exit_yaffs_fs(void)
-+{
-+
-+ struct file_system_to_install *fsinst;
-+
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs built " __DATE__ " " __TIME__ " removing.");
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 9, 0))
-+ remove_proc_entry("yaffs", YPROC_ROOT);
-+#endif
-+
-+ fsinst = fs_to_install;
-+
-+ while (fsinst->fst) {
-+ if (fsinst->installed) {
-+ unregister_filesystem(fsinst->fst);
-+ fsinst->installed = 0;
-+ }
-+ fsinst++;
-+ }
-+}
-+
-+module_init(init_yaffs_fs)
-+ module_exit(exit_yaffs_fs)
-+
-+ MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system");
-+MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2011");
-+MODULE_LICENSE("GPL");
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_yaffs1.c linux-3.12.20/fs/yaffs2/yaffs_yaffs1.c
---- linux-3.12.20.orig/fs/yaffs2/yaffs_yaffs1.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_yaffs1.c 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,422 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_yaffs1.h"
-+#include "yportenv.h"
-+#include "yaffs_trace.h"
-+#include "yaffs_bitmap.h"
-+#include "yaffs_getblockinfo.h"
-+#include "yaffs_nand.h"
-+#include "yaffs_attribs.h"
-+
-+int yaffs1_scan(struct yaffs_dev *dev)
-+{
-+ struct yaffs_ext_tags tags;
-+ int blk;
-+ int result;
-+ int chunk;
-+ int c;
-+ int deleted;
-+ enum yaffs_block_state state;
-+ LIST_HEAD(hard_list);
-+ struct yaffs_block_info *bi;
-+ u32 seq_number;
-+ struct yaffs_obj_hdr *oh;
-+ struct yaffs_obj *in;
-+ struct yaffs_obj *parent;
-+ int alloc_failed = 0;
-+ struct yaffs_shadow_fixer *shadow_fixers = NULL;
-+ u8 *chunk_data;
-+
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ "yaffs1_scan starts intstartblk %d intendblk %d...",
-+ dev->internal_start_block, dev->internal_end_block);
-+
-+ chunk_data = yaffs_get_temp_buffer(dev);
-+
-+ dev->seq_number = YAFFS_LOWEST_SEQUENCE_NUMBER;
-+
-+ /* Scan all the blocks to determine their state */
-+ bi = dev->block_info;
-+ for (blk = dev->internal_start_block; blk <= dev->internal_end_block;
-+ blk++) {
-+ yaffs_clear_chunk_bits(dev, blk);
-+ bi->pages_in_use = 0;
-+ bi->soft_del_pages = 0;
-+
-+ yaffs_query_init_block_state(dev, blk, &state, &seq_number);
-+
-+ bi->block_state = state;
-+ bi->seq_number = seq_number;
-+
-+ if (bi->seq_number == YAFFS_SEQUENCE_BAD_BLOCK)
-+ bi->block_state = state = YAFFS_BLOCK_STATE_DEAD;
-+
-+ yaffs_trace(YAFFS_TRACE_SCAN_DEBUG,
-+ "Block scanning block %d state %d seq %d",
-+ blk, state, seq_number);
-+
-+ if (state == YAFFS_BLOCK_STATE_DEAD) {
-+ yaffs_trace(YAFFS_TRACE_BAD_BLOCKS,
-+ "block %d is bad", blk);
-+ } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
-+ yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, "Block empty ");
-+ dev->n_erased_blocks++;
-+ dev->n_free_chunks += dev->param.chunks_per_block;
-+ }
-+ bi++;
-+ }
-+
-+ /* For each block.... */
-+ for (blk = dev->internal_start_block;
-+ !alloc_failed && blk <= dev->internal_end_block; blk++) {
-+
-+ cond_resched();
-+
-+ bi = yaffs_get_block_info(dev, blk);
-+ state = bi->block_state;
-+
-+ deleted = 0;
-+
-+ /* For each chunk in each block that needs scanning.... */
-+ for (c = 0;
-+ !alloc_failed && c < dev->param.chunks_per_block &&
-+ state == YAFFS_BLOCK_STATE_NEEDS_SCAN; c++) {
-+ /* Read the tags and decide what to do */
-+ chunk = blk * dev->param.chunks_per_block + c;
-+
-+ result = yaffs_rd_chunk_tags_nand(dev, chunk, NULL,
-+ &tags);
-+
-+ /* Let's have a good look at this chunk... */
-+
-+ if (tags.ecc_result == YAFFS_ECC_RESULT_UNFIXED ||
-+ tags.is_deleted) {
-+ /* YAFFS1 only...
-+ * A deleted chunk
-+ */
-+ deleted++;
-+ dev->n_free_chunks++;
-+ } else if (!tags.chunk_used) {
-+ /* An unassigned chunk in the block
-+ * This means that either the block is empty or
-+ * this is the one being allocated from
-+ */
-+
-+ if (c == 0) {
-+ /* We're looking at the first chunk in
-+ *the block so the block is unused */
-+ state = YAFFS_BLOCK_STATE_EMPTY;
-+ dev->n_erased_blocks++;
-+ } else {
-+ /* this is the block being allocated */
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ " Allocating from %d %d",
-+ blk, c);
-+ state = YAFFS_BLOCK_STATE_ALLOCATING;
-+ dev->alloc_block = blk;
-+ dev->alloc_page = c;
-+ dev->alloc_block_finder = blk;
-+
-+ }
-+
-+ dev->n_free_chunks +=
-+ (dev->param.chunks_per_block - c);
-+ } else if (tags.chunk_id > 0) {
-+ /* chunk_id > 0 so it is a data chunk... */
-+ unsigned int endpos;
-+
-+ yaffs_set_chunk_bit(dev, blk, c);
-+ bi->pages_in_use++;
-+
-+ in = yaffs_find_or_create_by_number(dev,
-+ tags.obj_id,
-+ YAFFS_OBJECT_TYPE_FILE);
-+ /* PutChunkIntoFile checks for a clash
-+ * (two data chunks with the same chunk_id).
-+ */
-+
-+ if (!in)
-+ alloc_failed = 1;
-+
-+ if (in) {
-+ if (!yaffs_put_chunk_in_file
-+ (in, tags.chunk_id, chunk, 1))
-+ alloc_failed = 1;
-+ }
-+
-+ endpos =
-+ (tags.chunk_id - 1) *
-+ dev->data_bytes_per_chunk +
-+ tags.n_bytes;
-+ if (in &&
-+ in->variant_type ==
-+ YAFFS_OBJECT_TYPE_FILE &&
-+ in->variant.file_variant.scanned_size <
-+ endpos) {
-+ in->variant.file_variant.scanned_size =
-+ endpos;
-+ if (!dev->param.use_header_file_size) {
-+ in->variant.
-+ file_variant.file_size =
-+ in->variant.
-+ file_variant.scanned_size;
-+ }
-+
-+ }
-+ } else {
-+ /* chunk_id == 0, so it is an ObjectHeader.
-+ * Make the object
-+ */
-+ yaffs_set_chunk_bit(dev, blk, c);
-+ bi->pages_in_use++;
-+
-+ result = yaffs_rd_chunk_tags_nand(dev, chunk,
-+ chunk_data,
-+ NULL);
-+
-+ oh = (struct yaffs_obj_hdr *)chunk_data;
-+
-+ in = yaffs_find_by_number(dev, tags.obj_id);
-+ if (in && in->variant_type != oh->type) {
-+ /* This should not happen, but somehow
-+ * Wev'e ended up with an obj_id that
-+ * has been reused but not yet deleted,
-+ * and worse still it has changed type.
-+ * Delete the old object.
-+ */
-+
-+ yaffs_del_obj(in);
-+ in = NULL;
-+ }
-+
-+ in = yaffs_find_or_create_by_number(dev,
-+ tags.obj_id,
-+ oh->type);
-+
-+ if (!in)
-+ alloc_failed = 1;
-+
-+ if (in && oh->shadows_obj > 0) {
-+
-+ struct yaffs_shadow_fixer *fixer;
-+ fixer =
-+ kmalloc(sizeof
-+ (struct yaffs_shadow_fixer),
-+ GFP_NOFS);
-+ if (fixer) {
-+ fixer->next = shadow_fixers;
-+ shadow_fixers = fixer;
-+ fixer->obj_id = tags.obj_id;
-+ fixer->shadowed_id =
-+ oh->shadows_obj;
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ " Shadow fixer: %d shadows %d",
-+ fixer->obj_id,
-+ fixer->shadowed_id);
-+
-+ }
-+
-+ }
-+
-+ if (in && in->valid) {
-+ /* We have already filled this one.
-+ * We have a duplicate and need to
-+ * resolve it. */
-+
-+ unsigned existing_serial = in->serial;
-+ unsigned new_serial =
-+ tags.serial_number;
-+
-+ if (((existing_serial + 1) & 3) ==
-+ new_serial) {
-+ /* Use new one - destroy the
-+ * exisiting one */
-+ yaffs_chunk_del(dev,
-+ in->hdr_chunk,
-+ 1, __LINE__);
-+ in->valid = 0;
-+ } else {
-+ /* Use existing - destroy
-+ * this one. */
-+ yaffs_chunk_del(dev, chunk, 1,
-+ __LINE__);
-+ }
-+ }
-+
-+ if (in && !in->valid &&
-+ (tags.obj_id == YAFFS_OBJECTID_ROOT ||
-+ tags.obj_id ==
-+ YAFFS_OBJECTID_LOSTNFOUND)) {
-+ /* We only load some info, don't fiddle
-+ * with directory structure */
-+ in->valid = 1;
-+ in->variant_type = oh->type;
-+
-+ in->yst_mode = oh->yst_mode;
-+ yaffs_load_attribs(in, oh);
-+ in->hdr_chunk = chunk;
-+ in->serial = tags.serial_number;
-+
-+ } else if (in && !in->valid) {
-+ /* we need to load this info */
-+
-+ in->valid = 1;
-+ in->variant_type = oh->type;
-+
-+ in->yst_mode = oh->yst_mode;
-+ yaffs_load_attribs(in, oh);
-+ in->hdr_chunk = chunk;
-+ in->serial = tags.serial_number;
-+
-+ yaffs_set_obj_name_from_oh(in, oh);
-+ in->dirty = 0;
-+
-+ /* directory stuff...
-+ * hook up to parent
-+ */
-+
-+ parent =
-+ yaffs_find_or_create_by_number
-+ (dev, oh->parent_obj_id,
-+ YAFFS_OBJECT_TYPE_DIRECTORY);
-+ if (!parent)
-+ alloc_failed = 1;
-+ if (parent && parent->variant_type ==
-+ YAFFS_OBJECT_TYPE_UNKNOWN) {
-+ /* Set up as a directory */
-+ parent->variant_type =
-+ YAFFS_OBJECT_TYPE_DIRECTORY;
-+ INIT_LIST_HEAD(&parent->
-+ variant.dir_variant.
-+ children);
-+ } else if (!parent ||
-+ parent->variant_type !=
-+ YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ /* Hoosterman, a problem....
-+ * We're trying to use a
-+ * non-directory as a directory
-+ */
-+
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
-+ );
-+ parent = dev->lost_n_found;
-+ }
-+
-+ yaffs_add_obj_to_dir(parent, in);
-+
-+ switch (in->variant_type) {
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ /* Todo got a problem */
-+ break;
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ if (dev->param.
-+ use_header_file_size)
-+ in->variant.
-+ file_variant.file_size
-+ = yaffs_oh_to_size(oh);
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ in->variant.
-+ hardlink_variant.equiv_id =
-+ oh->equiv_id;
-+ list_add(&in->hard_links,
-+ &hard_list);
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ /* Do nothing */
-+ break;
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ /* Do nothing */
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ in->variant.symlink_variant.
-+ alias =
-+ yaffs_clone_str(oh->alias);
-+ if (!in->variant.
-+ symlink_variant.alias)
-+ alloc_failed = 1;
-+ break;
-+ }
-+ }
-+ }
-+ }
-+
-+ if (state == YAFFS_BLOCK_STATE_NEEDS_SCAN) {
-+ /* If we got this far while scanning,
-+ * then the block is fully allocated. */
-+ state = YAFFS_BLOCK_STATE_FULL;
-+ }
-+
-+ if (state == YAFFS_BLOCK_STATE_ALLOCATING) {
-+ /* If the block was partially allocated then
-+ * treat it as fully allocated. */
-+ state = YAFFS_BLOCK_STATE_FULL;
-+ dev->alloc_block = -1;
-+ }
-+
-+ bi->block_state = state;
-+
-+ /* Now let's see if it was dirty */
-+ if (bi->pages_in_use == 0 &&
-+ !bi->has_shrink_hdr &&
-+ bi->block_state == YAFFS_BLOCK_STATE_FULL)
-+ yaffs_block_became_dirty(dev, blk);
-+ }
-+
-+ /* Ok, we've done all the scanning.
-+ * Fix up the hard link chains.
-+ * We should now have scanned all the objects, now it's time to add
-+ * these hardlinks.
-+ */
-+
-+ yaffs_link_fixup(dev, &hard_list);
-+
-+ /*
-+ * Fix up any shadowed objects.
-+ * There should not be more than one of these.
-+ */
-+ {
-+ struct yaffs_shadow_fixer *fixer;
-+ struct yaffs_obj *obj;
-+
-+ while (shadow_fixers) {
-+ fixer = shadow_fixers;
-+ shadow_fixers = fixer->next;
-+ /* Complete the rename transaction by deleting the
-+ * shadowed object then setting the object header
-+ to unshadowed.
-+ */
-+ obj = yaffs_find_by_number(dev, fixer->shadowed_id);
-+ if (obj)
-+ yaffs_del_obj(obj);
-+
-+ obj = yaffs_find_by_number(dev, fixer->obj_id);
-+
-+ if (obj)
-+ yaffs_update_oh(obj, NULL, 1, 0, 0, NULL);
-+
-+ kfree(fixer);
-+ }
-+ }
-+
-+ yaffs_release_temp_buffer(dev, chunk_data);
-+
-+ if (alloc_failed)
-+ return YAFFS_FAIL;
-+
-+ yaffs_trace(YAFFS_TRACE_SCAN, "yaffs1_scan ends");
-+
-+ return YAFFS_OK;
-+}
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_yaffs1.h linux-3.12.20/fs/yaffs2/yaffs_yaffs1.h
---- linux-3.12.20.orig/fs/yaffs2/yaffs_yaffs1.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_yaffs1.h 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,22 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_YAFFS1_H__
-+#define __YAFFS_YAFFS1_H__
-+
-+#include "yaffs_guts.h"
-+int yaffs1_scan(struct yaffs_dev *dev);
-+
-+#endif
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_yaffs2.c linux-3.12.20/fs/yaffs2/yaffs_yaffs2.c
---- linux-3.12.20.orig/fs/yaffs2/yaffs_yaffs2.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_yaffs2.c 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,1534 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_guts.h"
-+#include "yaffs_trace.h"
-+#include "yaffs_yaffs2.h"
-+#include "yaffs_checkptrw.h"
-+#include "yaffs_bitmap.h"
-+#include "yaffs_nand.h"
-+#include "yaffs_getblockinfo.h"
-+#include "yaffs_verify.h"
-+#include "yaffs_attribs.h"
-+#include "yaffs_summary.h"
-+
-+/*
-+ * Checkpoints are really no benefit on very small partitions.
-+ *
-+ * To save space on small partitions don't bother with checkpoints unless
-+ * the partition is at least this big.
-+ */
-+#define YAFFS_CHECKPOINT_MIN_BLOCKS 60
-+#define YAFFS_SMALL_HOLE_THRESHOLD 4
-+
-+/*
-+ * Oldest Dirty Sequence Number handling.
-+ */
-+
-+/* yaffs_calc_oldest_dirty_seq()
-+ * yaffs2_find_oldest_dirty_seq()
-+ * Calculate the oldest dirty sequence number if we don't know it.
-+ */
-+void yaffs_calc_oldest_dirty_seq(struct yaffs_dev *dev)
-+{
-+ int i;
-+ unsigned seq;
-+ unsigned block_no = 0;
-+ struct yaffs_block_info *b;
-+
-+ if (!dev->param.is_yaffs2)
-+ return;
-+
-+ /* Find the oldest dirty sequence number. */
-+ seq = dev->seq_number + 1;
-+ b = dev->block_info;
-+ for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
-+ if (b->block_state == YAFFS_BLOCK_STATE_FULL &&
-+ (b->pages_in_use - b->soft_del_pages) <
-+ dev->param.chunks_per_block &&
-+ b->seq_number < seq) {
-+ seq = b->seq_number;
-+ block_no = i;
-+ }
-+ b++;
-+ }
-+
-+ if (block_no) {
-+ dev->oldest_dirty_seq = seq;
-+ dev->oldest_dirty_block = block_no;
-+ }
-+}
-+
-+void yaffs2_find_oldest_dirty_seq(struct yaffs_dev *dev)
-+{
-+ if (!dev->param.is_yaffs2)
-+ return;
-+
-+ if (!dev->oldest_dirty_seq)
-+ yaffs_calc_oldest_dirty_seq(dev);
-+}
-+
-+/*
-+ * yaffs_clear_oldest_dirty_seq()
-+ * Called when a block is erased or marked bad. (ie. when its seq_number
-+ * becomes invalid). If the value matches the oldest then we clear
-+ * dev->oldest_dirty_seq to force its recomputation.
-+ */
-+void yaffs2_clear_oldest_dirty_seq(struct yaffs_dev *dev,
-+ struct yaffs_block_info *bi)
-+{
-+
-+ if (!dev->param.is_yaffs2)
-+ return;
-+
-+ if (!bi || bi->seq_number == dev->oldest_dirty_seq) {
-+ dev->oldest_dirty_seq = 0;
-+ dev->oldest_dirty_block = 0;
-+ }
-+}
-+
-+/*
-+ * yaffs2_update_oldest_dirty_seq()
-+ * Update the oldest dirty sequence number whenever we dirty a block.
-+ * Only do this if the oldest_dirty_seq is actually being tracked.
-+ */
-+void yaffs2_update_oldest_dirty_seq(struct yaffs_dev *dev, unsigned block_no,
-+ struct yaffs_block_info *bi)
-+{
-+ if (!dev->param.is_yaffs2)
-+ return;
-+
-+ if (dev->oldest_dirty_seq) {
-+ if (dev->oldest_dirty_seq > bi->seq_number) {
-+ dev->oldest_dirty_seq = bi->seq_number;
-+ dev->oldest_dirty_block = block_no;
-+ }
-+ }
-+}
-+
-+int yaffs_block_ok_for_gc(struct yaffs_dev *dev, struct yaffs_block_info *bi)
-+{
-+
-+ if (!dev->param.is_yaffs2)
-+ return 1; /* disqualification only applies to yaffs2. */
-+
-+ if (!bi->has_shrink_hdr)
-+ return 1; /* can gc */
-+
-+ yaffs2_find_oldest_dirty_seq(dev);
-+
-+ /* Can't do gc of this block if there are any blocks older than this
-+ * one that have discarded pages.
-+ */
-+ return (bi->seq_number <= dev->oldest_dirty_seq);
-+}
-+
-+/*
-+ * yaffs2_find_refresh_block()
-+ * periodically finds the oldest full block by sequence number for refreshing.
-+ * Only for yaffs2.
-+ */
-+u32 yaffs2_find_refresh_block(struct yaffs_dev *dev)
-+{
-+ u32 b;
-+ u32 oldest = 0;
-+ u32 oldest_seq = 0;
-+ struct yaffs_block_info *bi;
-+
-+ if (!dev->param.is_yaffs2)
-+ return oldest;
-+
-+ /*
-+ * If refresh period < 10 then refreshing is disabled.
-+ */
-+ if (dev->param.refresh_period < 10)
-+ return oldest;
-+
-+ /*
-+ * Fix broken values.
-+ */
-+ if (dev->refresh_skip > dev->param.refresh_period)
-+ dev->refresh_skip = dev->param.refresh_period;
-+
-+ if (dev->refresh_skip > 0)
-+ return oldest;
-+
-+ /*
-+ * Refresh skip is now zero.
-+ * We'll do a refresh this time around....
-+ * Update the refresh skip and find the oldest block.
-+ */
-+ dev->refresh_skip = dev->param.refresh_period;
-+ dev->refresh_count++;
-+ bi = dev->block_info;
-+ for (b = dev->internal_start_block; b <= dev->internal_end_block; b++) {
-+
-+ if (bi->block_state == YAFFS_BLOCK_STATE_FULL) {
-+
-+ if (oldest < 1 || bi->seq_number < oldest_seq) {
-+ oldest = b;
-+ oldest_seq = bi->seq_number;
-+ }
-+ }
-+ bi++;
-+ }
-+
-+ if (oldest > 0) {
-+ yaffs_trace(YAFFS_TRACE_GC,
-+ "GC refresh count %d selected block %d with seq_number %d",
-+ dev->refresh_count, oldest, oldest_seq);
-+ }
-+
-+ return oldest;
-+}
-+
-+int yaffs2_checkpt_required(struct yaffs_dev *dev)
-+{
-+ int nblocks;
-+
-+ if (!dev->param.is_yaffs2)
-+ return 0;
-+
-+ nblocks = dev->internal_end_block - dev->internal_start_block + 1;
-+
-+ return !dev->param.skip_checkpt_wr &&
-+ !dev->read_only && (nblocks >= YAFFS_CHECKPOINT_MIN_BLOCKS);
-+}
-+
-+int yaffs_calc_checkpt_blocks_required(struct yaffs_dev *dev)
-+{
-+ int retval;
-+ int n_bytes = 0;
-+ int n_blocks;
-+ int dev_blocks;
-+
-+ if (!dev->param.is_yaffs2)
-+ return 0;
-+
-+ if (!dev->checkpoint_blocks_required && yaffs2_checkpt_required(dev)) {
-+ /* Not a valid value so recalculate */
-+ dev_blocks = dev->param.end_block - dev->param.start_block + 1;
-+ n_bytes += sizeof(struct yaffs_checkpt_validity);
-+ n_bytes += sizeof(struct yaffs_checkpt_dev);
-+ n_bytes += dev_blocks * sizeof(struct yaffs_block_info);
-+ n_bytes += dev_blocks * dev->chunk_bit_stride;
-+ n_bytes +=
-+ (sizeof(struct yaffs_checkpt_obj) + sizeof(u32)) *
-+ dev->n_obj;
-+ n_bytes += (dev->tnode_size + sizeof(u32)) * dev->n_tnodes;
-+ n_bytes += sizeof(struct yaffs_checkpt_validity);
-+ n_bytes += sizeof(u32); /* checksum */
-+
-+ /* Round up and add 2 blocks to allow for some bad blocks,
-+ * so add 3 */
-+
-+ n_blocks =
-+ (n_bytes /
-+ (dev->data_bytes_per_chunk *
-+ dev->param.chunks_per_block)) + 3;
-+
-+ dev->checkpoint_blocks_required = n_blocks;
-+ }
-+
-+ retval = dev->checkpoint_blocks_required - dev->blocks_in_checkpt;
-+ if (retval < 0)
-+ retval = 0;
-+ return retval;
-+}
-+
-+/*--------------------- Checkpointing --------------------*/
-+
-+static int yaffs2_wr_checkpt_validity_marker(struct yaffs_dev *dev, int head)
-+{
-+ struct yaffs_checkpt_validity cp;
-+
-+ memset(&cp, 0, sizeof(cp));
-+
-+ cp.struct_type = sizeof(cp);
-+ cp.magic = YAFFS_MAGIC;
-+ cp.version = YAFFS_CHECKPOINT_VERSION;
-+ cp.head = (head) ? 1 : 0;
-+
-+ return (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp)) ? 1 : 0;
-+}
-+
-+static int yaffs2_rd_checkpt_validity_marker(struct yaffs_dev *dev, int head)
-+{
-+ struct yaffs_checkpt_validity cp;
-+ int ok;
-+
-+ ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp));
-+
-+ if (ok)
-+ ok = (cp.struct_type == sizeof(cp)) &&
-+ (cp.magic == YAFFS_MAGIC) &&
-+ (cp.version == YAFFS_CHECKPOINT_VERSION) &&
-+ (cp.head == ((head) ? 1 : 0));
-+ return ok ? 1 : 0;
-+}
-+
-+static void yaffs2_dev_to_checkpt_dev(struct yaffs_checkpt_dev *cp,
-+ struct yaffs_dev *dev)
-+{
-+ cp->n_erased_blocks = dev->n_erased_blocks;
-+ cp->alloc_block = dev->alloc_block;
-+ cp->alloc_page = dev->alloc_page;
-+ cp->n_free_chunks = dev->n_free_chunks;
-+
-+ cp->n_deleted_files = dev->n_deleted_files;
-+ cp->n_unlinked_files = dev->n_unlinked_files;
-+ cp->n_bg_deletions = dev->n_bg_deletions;
-+ cp->seq_number = dev->seq_number;
-+
-+}
-+
-+static void yaffs_checkpt_dev_to_dev(struct yaffs_dev *dev,
-+ struct yaffs_checkpt_dev *cp)
-+{
-+ dev->n_erased_blocks = cp->n_erased_blocks;
-+ dev->alloc_block = cp->alloc_block;
-+ dev->alloc_page = cp->alloc_page;
-+ dev->n_free_chunks = cp->n_free_chunks;
-+
-+ dev->n_deleted_files = cp->n_deleted_files;
-+ dev->n_unlinked_files = cp->n_unlinked_files;
-+ dev->n_bg_deletions = cp->n_bg_deletions;
-+ dev->seq_number = cp->seq_number;
-+}
-+
-+static int yaffs2_wr_checkpt_dev(struct yaffs_dev *dev)
-+{
-+ struct yaffs_checkpt_dev cp;
-+ u32 n_bytes;
-+ u32 n_blocks = dev->internal_end_block - dev->internal_start_block + 1;
-+ int ok;
-+
-+ /* Write device runtime values */
-+ yaffs2_dev_to_checkpt_dev(&cp, dev);
-+ cp.struct_type = sizeof(cp);
-+
-+ ok = (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp));
-+ if (!ok)
-+ return 0;
-+
-+ /* Write block info */
-+ n_bytes = n_blocks * sizeof(struct yaffs_block_info);
-+ ok = (yaffs2_checkpt_wr(dev, dev->block_info, n_bytes) == n_bytes);
-+ if (!ok)
-+ return 0;
-+
-+ /* Write chunk bits */
-+ n_bytes = n_blocks * dev->chunk_bit_stride;
-+ ok = (yaffs2_checkpt_wr(dev, dev->chunk_bits, n_bytes) == n_bytes);
-+
-+ return ok ? 1 : 0;
-+}
-+
-+static int yaffs2_rd_checkpt_dev(struct yaffs_dev *dev)
-+{
-+ struct yaffs_checkpt_dev cp;
-+ u32 n_bytes;
-+ u32 n_blocks =
-+ (dev->internal_end_block - dev->internal_start_block + 1);
-+ int ok;
-+
-+ ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp));
-+ if (!ok)
-+ return 0;
-+
-+ if (cp.struct_type != sizeof(cp))
-+ return 0;
-+
-+ yaffs_checkpt_dev_to_dev(dev, &cp);
-+
-+ n_bytes = n_blocks * sizeof(struct yaffs_block_info);
-+
-+ ok = (yaffs2_checkpt_rd(dev, dev->block_info, n_bytes) == n_bytes);
-+
-+ if (!ok)
-+ return 0;
-+
-+ n_bytes = n_blocks * dev->chunk_bit_stride;
-+
-+ ok = (yaffs2_checkpt_rd(dev, dev->chunk_bits, n_bytes) == n_bytes);
-+
-+ return ok ? 1 : 0;
-+}
-+
-+static void yaffs2_obj_checkpt_obj(struct yaffs_checkpt_obj *cp,
-+ struct yaffs_obj *obj)
-+{
-+ cp->obj_id = obj->obj_id;
-+ cp->parent_id = (obj->parent) ? obj->parent->obj_id : 0;
-+ cp->hdr_chunk = obj->hdr_chunk;
-+ cp->variant_type = obj->variant_type;
-+ cp->deleted = obj->deleted;
-+ cp->soft_del = obj->soft_del;
-+ cp->unlinked = obj->unlinked;
-+ cp->fake = obj->fake;
-+ cp->rename_allowed = obj->rename_allowed;
-+ cp->unlink_allowed = obj->unlink_allowed;
-+ cp->serial = obj->serial;
-+ cp->n_data_chunks = obj->n_data_chunks;
-+
-+ if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE)
-+ cp->size_or_equiv_obj = obj->variant.file_variant.file_size;
-+ else if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK)
-+ cp->size_or_equiv_obj = obj->variant.hardlink_variant.equiv_id;
-+}
-+
-+static int yaffs2_checkpt_obj_to_obj(struct yaffs_obj *obj,
-+ struct yaffs_checkpt_obj *cp)
-+{
-+ struct yaffs_obj *parent;
-+
-+ if (obj->variant_type != cp->variant_type) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "Checkpoint read object %d type %d chunk %d does not match existing object type %d",
-+ cp->obj_id, cp->variant_type, cp->hdr_chunk,
-+ obj->variant_type);
-+ return 0;
-+ }
-+
-+ obj->obj_id = cp->obj_id;
-+
-+ if (cp->parent_id)
-+ parent = yaffs_find_or_create_by_number(obj->my_dev,
-+ cp->parent_id,
-+ YAFFS_OBJECT_TYPE_DIRECTORY);
-+ else
-+ parent = NULL;
-+
-+ if (parent) {
-+ if (parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "Checkpoint read object %d parent %d type %d chunk %d Parent type, %d, not directory",
-+ cp->obj_id, cp->parent_id,
-+ cp->variant_type, cp->hdr_chunk,
-+ parent->variant_type);
-+ return 0;
-+ }
-+ yaffs_add_obj_to_dir(parent, obj);
-+ }
-+
-+ obj->hdr_chunk = cp->hdr_chunk;
-+ obj->variant_type = cp->variant_type;
-+ obj->deleted = cp->deleted;
-+ obj->soft_del = cp->soft_del;
-+ obj->unlinked = cp->unlinked;
-+ obj->fake = cp->fake;
-+ obj->rename_allowed = cp->rename_allowed;
-+ obj->unlink_allowed = cp->unlink_allowed;
-+ obj->serial = cp->serial;
-+ obj->n_data_chunks = cp->n_data_chunks;
-+
-+ if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE)
-+ obj->variant.file_variant.file_size = cp->size_or_equiv_obj;
-+ else if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK)
-+ obj->variant.hardlink_variant.equiv_id = cp->size_or_equiv_obj;
-+
-+ if (obj->hdr_chunk > 0)
-+ obj->lazy_loaded = 1;
-+ return 1;
-+}
-+
-+static int yaffs2_checkpt_tnode_worker(struct yaffs_obj *in,
-+ struct yaffs_tnode *tn, u32 level,
-+ int chunk_offset)
-+{
-+ int i;
-+ struct yaffs_dev *dev = in->my_dev;
-+ int ok = 1;
-+ u32 base_offset;
-+
-+ if (!tn)
-+ return 1;
-+
-+ if (level > 0) {
-+ for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
-+ if (!tn->internal[i])
-+ continue;
-+ ok = yaffs2_checkpt_tnode_worker(in,
-+ tn->internal[i],
-+ level - 1,
-+ (chunk_offset <<
-+ YAFFS_TNODES_INTERNAL_BITS) + i);
-+ }
-+ return ok;
-+ }
-+
-+ /* Level 0 tnode */
-+ base_offset = chunk_offset << YAFFS_TNODES_LEVEL0_BITS;
-+ ok = (yaffs2_checkpt_wr(dev, &base_offset, sizeof(base_offset)) ==
-+ sizeof(base_offset));
-+ if (ok)
-+ ok = (yaffs2_checkpt_wr(dev, tn, dev->tnode_size) ==
-+ dev->tnode_size);
-+
-+ return ok;
-+}
-+
-+static int yaffs2_wr_checkpt_tnodes(struct yaffs_obj *obj)
-+{
-+ u32 end_marker = ~0;
-+ int ok = 1;
-+
-+ if (obj->variant_type != YAFFS_OBJECT_TYPE_FILE)
-+ return ok;
-+
-+ ok = yaffs2_checkpt_tnode_worker(obj,
-+ obj->variant.file_variant.top,
-+ obj->variant.file_variant.
-+ top_level, 0);
-+ if (ok)
-+ ok = (yaffs2_checkpt_wr(obj->my_dev, &end_marker,
-+ sizeof(end_marker)) == sizeof(end_marker));
-+
-+ return ok ? 1 : 0;
-+}
-+
-+static int yaffs2_rd_checkpt_tnodes(struct yaffs_obj *obj)
-+{
-+ u32 base_chunk;
-+ int ok = 1;
-+ struct yaffs_dev *dev = obj->my_dev;
-+ struct yaffs_file_var *file_stuct_ptr = &obj->variant.file_variant;
-+ struct yaffs_tnode *tn;
-+ int nread = 0;
-+
-+ ok = (yaffs2_checkpt_rd(dev, &base_chunk, sizeof(base_chunk)) ==
-+ sizeof(base_chunk));
-+
-+ while (ok && (~base_chunk)) {
-+ nread++;
-+ /* Read level 0 tnode */
-+
-+ tn = yaffs_get_tnode(dev);
-+ if (tn)
-+ ok = (yaffs2_checkpt_rd(dev, tn, dev->tnode_size) ==
-+ dev->tnode_size);
-+ else
-+ ok = 0;
-+
-+ if (tn && ok)
-+ ok = yaffs_add_find_tnode_0(dev,
-+ file_stuct_ptr,
-+ base_chunk, tn) ? 1 : 0;
-+
-+ if (ok)
-+ ok = (yaffs2_checkpt_rd
-+ (dev, &base_chunk,
-+ sizeof(base_chunk)) == sizeof(base_chunk));
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "Checkpoint read tnodes %d records, last %d. ok %d",
-+ nread, base_chunk, ok);
-+
-+ return ok ? 1 : 0;
-+}
-+
-+static int yaffs2_wr_checkpt_objs(struct yaffs_dev *dev)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_checkpt_obj cp;
-+ int i;
-+ int ok = 1;
-+ struct list_head *lh;
-+
-+ /* Iterate through the objects in each hash entry,
-+ * dumping them to the checkpointing stream.
-+ */
-+
-+ for (i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++) {
-+ list_for_each(lh, &dev->obj_bucket[i].list) {
-+ obj = list_entry(lh, struct yaffs_obj, hash_link);
-+ if (!obj->defered_free) {
-+ yaffs2_obj_checkpt_obj(&cp, obj);
-+ cp.struct_type = sizeof(cp);
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "Checkpoint write object %d parent %d type %d chunk %d obj addr %p",
-+ cp.obj_id, cp.parent_id,
-+ cp.variant_type, cp.hdr_chunk, obj);
-+
-+ ok = (yaffs2_checkpt_wr(dev, &cp,
-+ sizeof(cp)) == sizeof(cp));
-+
-+ if (ok &&
-+ obj->variant_type ==
-+ YAFFS_OBJECT_TYPE_FILE)
-+ ok = yaffs2_wr_checkpt_tnodes(obj);
-+ }
-+ }
-+ }
-+
-+ /* Dump end of list */
-+ memset(&cp, 0xff, sizeof(struct yaffs_checkpt_obj));
-+ cp.struct_type = sizeof(cp);
-+
-+ if (ok)
-+ ok = (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp));
-+
-+ return ok ? 1 : 0;
-+}
-+
-+static int yaffs2_rd_checkpt_objs(struct yaffs_dev *dev)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_checkpt_obj cp;
-+ int ok = 1;
-+ int done = 0;
-+ LIST_HEAD(hard_list);
-+
-+
-+ while (ok && !done) {
-+ ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp));
-+ if (cp.struct_type != sizeof(cp)) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "struct size %d instead of %d ok %d",
-+ cp.struct_type, (int)sizeof(cp), ok);
-+ ok = 0;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "Checkpoint read object %d parent %d type %d chunk %d ",
-+ cp.obj_id, cp.parent_id, cp.variant_type,
-+ cp.hdr_chunk);
-+
-+ if (ok && cp.obj_id == ~0) {
-+ done = 1;
-+ } else if (ok) {
-+ obj =
-+ yaffs_find_or_create_by_number(dev, cp.obj_id,
-+ cp.variant_type);
-+ if (obj) {
-+ ok = yaffs2_checkpt_obj_to_obj(obj, &cp);
-+ if (!ok)
-+ break;
-+ if (obj->variant_type ==
-+ YAFFS_OBJECT_TYPE_FILE) {
-+ ok = yaffs2_rd_checkpt_tnodes(obj);
-+ } else if (obj->variant_type ==
-+ YAFFS_OBJECT_TYPE_HARDLINK) {
-+ list_add(&obj->hard_links, &hard_list);
-+ }
-+ } else {
-+ ok = 0;
-+ }
-+ }
-+ }
-+
-+ if (ok)
-+ yaffs_link_fixup(dev, &hard_list);
-+
-+ return ok ? 1 : 0;
-+}
-+
-+static int yaffs2_wr_checkpt_sum(struct yaffs_dev *dev)
-+{
-+ u32 checkpt_sum;
-+ int ok;
-+
-+ yaffs2_get_checkpt_sum(dev, &checkpt_sum);
-+
-+ ok = (yaffs2_checkpt_wr(dev, &checkpt_sum, sizeof(checkpt_sum)) ==
-+ sizeof(checkpt_sum));
-+
-+ if (!ok)
-+ return 0;
-+
-+ return 1;
-+}
-+
-+static int yaffs2_rd_checkpt_sum(struct yaffs_dev *dev)
-+{
-+ u32 checkpt_sum0;
-+ u32 checkpt_sum1;
-+ int ok;
-+
-+ yaffs2_get_checkpt_sum(dev, &checkpt_sum0);
-+
-+ ok = (yaffs2_checkpt_rd(dev, &checkpt_sum1, sizeof(checkpt_sum1)) ==
-+ sizeof(checkpt_sum1));
-+
-+ if (!ok)
-+ return 0;
-+
-+ if (checkpt_sum0 != checkpt_sum1)
-+ return 0;
-+
-+ return 1;
-+}
-+
-+static int yaffs2_wr_checkpt_data(struct yaffs_dev *dev)
-+{
-+ int ok = 1;
-+
-+ if (!yaffs2_checkpt_required(dev)) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "skipping checkpoint write");
-+ ok = 0;
-+ }
-+
-+ if (ok)
-+ ok = yaffs2_checkpt_open(dev, 1);
-+
-+ if (ok) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "write checkpoint validity");
-+ ok = yaffs2_wr_checkpt_validity_marker(dev, 1);
-+ }
-+ if (ok) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "write checkpoint device");
-+ ok = yaffs2_wr_checkpt_dev(dev);
-+ }
-+ if (ok) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "write checkpoint objects");
-+ ok = yaffs2_wr_checkpt_objs(dev);
-+ }
-+ if (ok) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "write checkpoint validity");
-+ ok = yaffs2_wr_checkpt_validity_marker(dev, 0);
-+ }
-+
-+ if (ok)
-+ ok = yaffs2_wr_checkpt_sum(dev);
-+
-+ if (!yaffs_checkpt_close(dev))
-+ ok = 0;
-+
-+ if (ok)
-+ dev->is_checkpointed = 1;
-+ else
-+ dev->is_checkpointed = 0;
-+
-+ return dev->is_checkpointed;
-+}
-+
-+static int yaffs2_rd_checkpt_data(struct yaffs_dev *dev)
-+{
-+ int ok = 1;
-+
-+ if (!dev->param.is_yaffs2)
-+ ok = 0;
-+
-+ if (ok && dev->param.skip_checkpt_rd) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "skipping checkpoint read");
-+ ok = 0;
-+ }
-+
-+ if (ok)
-+ ok = yaffs2_checkpt_open(dev, 0); /* open for read */
-+
-+ if (ok) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "read checkpoint validity");
-+ ok = yaffs2_rd_checkpt_validity_marker(dev, 1);
-+ }
-+ if (ok) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "read checkpoint device");
-+ ok = yaffs2_rd_checkpt_dev(dev);
-+ }
-+ if (ok) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "read checkpoint objects");
-+ ok = yaffs2_rd_checkpt_objs(dev);
-+ }
-+ if (ok) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "read checkpoint validity");
-+ ok = yaffs2_rd_checkpt_validity_marker(dev, 0);
-+ }
-+
-+ if (ok) {
-+ ok = yaffs2_rd_checkpt_sum(dev);
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "read checkpoint checksum %d", ok);
-+ }
-+
-+ if (!yaffs_checkpt_close(dev))
-+ ok = 0;
-+
-+ if (ok)
-+ dev->is_checkpointed = 1;
-+ else
-+ dev->is_checkpointed = 0;
-+
-+ return ok ? 1 : 0;
-+}
-+
-+void yaffs2_checkpt_invalidate(struct yaffs_dev *dev)
-+{
-+ if (dev->is_checkpointed || dev->blocks_in_checkpt > 0) {
-+ dev->is_checkpointed = 0;
-+ yaffs2_checkpt_invalidate_stream(dev);
-+ }
-+ if (dev->param.sb_dirty_fn)
-+ dev->param.sb_dirty_fn(dev);
-+}
-+
-+int yaffs_checkpoint_save(struct yaffs_dev *dev)
-+{
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "save entry: is_checkpointed %d",
-+ dev->is_checkpointed);
-+
-+ yaffs_verify_objects(dev);
-+ yaffs_verify_blocks(dev);
-+ yaffs_verify_free_chunks(dev);
-+
-+ if (!dev->is_checkpointed) {
-+ yaffs2_checkpt_invalidate(dev);
-+ yaffs2_wr_checkpt_data(dev);
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT | YAFFS_TRACE_MOUNT,
-+ "save exit: is_checkpointed %d",
-+ dev->is_checkpointed);
-+
-+ return dev->is_checkpointed;
-+}
-+
-+int yaffs2_checkpt_restore(struct yaffs_dev *dev)
-+{
-+ int retval;
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "restore entry: is_checkpointed %d",
-+ dev->is_checkpointed);
-+
-+ retval = yaffs2_rd_checkpt_data(dev);
-+
-+ if (dev->is_checkpointed) {
-+ yaffs_verify_objects(dev);
-+ yaffs_verify_blocks(dev);
-+ yaffs_verify_free_chunks(dev);
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "restore exit: is_checkpointed %d",
-+ dev->is_checkpointed);
-+
-+ return retval;
-+}
-+
-+int yaffs2_handle_hole(struct yaffs_obj *obj, loff_t new_size)
-+{
-+ /* if new_size > old_file_size.
-+ * We're going to be writing a hole.
-+ * If the hole is small then write zeros otherwise write a start
-+ * of hole marker.
-+ */
-+ loff_t old_file_size;
-+ loff_t increase;
-+ int small_hole;
-+ int result = YAFFS_OK;
-+ struct yaffs_dev *dev = NULL;
-+ u8 *local_buffer = NULL;
-+ int small_increase_ok = 0;
-+
-+ if (!obj)
-+ return YAFFS_FAIL;
-+
-+ if (obj->variant_type != YAFFS_OBJECT_TYPE_FILE)
-+ return YAFFS_FAIL;
-+
-+ dev = obj->my_dev;
-+
-+ /* Bail out if not yaffs2 mode */
-+ if (!dev->param.is_yaffs2)
-+ return YAFFS_OK;
-+
-+ old_file_size = obj->variant.file_variant.file_size;
-+
-+ if (new_size <= old_file_size)
-+ return YAFFS_OK;
-+
-+ increase = new_size - old_file_size;
-+
-+ if (increase < YAFFS_SMALL_HOLE_THRESHOLD * dev->data_bytes_per_chunk &&
-+ yaffs_check_alloc_available(dev, YAFFS_SMALL_HOLE_THRESHOLD + 1))
-+ small_hole = 1;
-+ else
-+ small_hole = 0;
-+
-+ if (small_hole)
-+ local_buffer = yaffs_get_temp_buffer(dev);
-+
-+ if (local_buffer) {
-+ /* fill hole with zero bytes */
-+ loff_t pos = old_file_size;
-+ int this_write;
-+ int written;
-+ memset(local_buffer, 0, dev->data_bytes_per_chunk);
-+ small_increase_ok = 1;
-+
-+ while (increase > 0 && small_increase_ok) {
-+ this_write = increase;
-+ if (this_write > dev->data_bytes_per_chunk)
-+ this_write = dev->data_bytes_per_chunk;
-+ written =
-+ yaffs_do_file_wr(obj, local_buffer, pos, this_write,
-+ 0);
-+ if (written == this_write) {
-+ pos += this_write;
-+ increase -= this_write;
-+ } else {
-+ small_increase_ok = 0;
-+ }
-+ }
-+
-+ yaffs_release_temp_buffer(dev, local_buffer);
-+
-+ /* If out of space then reverse any chunks we've added */
-+ if (!small_increase_ok)
-+ yaffs_resize_file_down(obj, old_file_size);
-+ }
-+
-+ if (!small_increase_ok &&
-+ obj->parent &&
-+ obj->parent->obj_id != YAFFS_OBJECTID_UNLINKED &&
-+ obj->parent->obj_id != YAFFS_OBJECTID_DELETED) {
-+ /* Write a hole start header with the old file size */
-+ yaffs_update_oh(obj, NULL, 0, 1, 0, NULL);
-+ }
-+
-+ return result;
-+}
-+
-+struct yaffs_block_index {
-+ int seq;
-+ int block;
-+};
-+
-+static int yaffs2_ybicmp(const void *a, const void *b)
-+{
-+ int aseq = ((struct yaffs_block_index *)a)->seq;
-+ int bseq = ((struct yaffs_block_index *)b)->seq;
-+ int ablock = ((struct yaffs_block_index *)a)->block;
-+ int bblock = ((struct yaffs_block_index *)b)->block;
-+
-+ if (aseq == bseq)
-+ return ablock - bblock;
-+
-+ return aseq - bseq;
-+}
-+
-+static inline int yaffs2_scan_chunk(struct yaffs_dev *dev,
-+ struct yaffs_block_info *bi,
-+ int blk, int chunk_in_block,
-+ int *found_chunks,
-+ u8 *chunk_data,
-+ struct list_head *hard_list,
-+ int summary_available)
-+{
-+ struct yaffs_obj_hdr *oh;
-+ struct yaffs_obj *in;
-+ struct yaffs_obj *parent;
-+ int equiv_id;
-+ loff_t file_size;
-+ int is_shrink;
-+ int is_unlinked;
-+ struct yaffs_ext_tags tags;
-+ int result;
-+ int alloc_failed = 0;
-+ int chunk = blk * dev->param.chunks_per_block + chunk_in_block;
-+ struct yaffs_file_var *file_var;
-+ struct yaffs_hardlink_var *hl_var;
-+ struct yaffs_symlink_var *sl_var;
-+
-+ if (summary_available) {
-+ result = yaffs_summary_fetch(dev, &tags, chunk_in_block);
-+ tags.seq_number = bi->seq_number;
-+ }
-+
-+ if (!summary_available || tags.obj_id == 0) {
-+ result = yaffs_rd_chunk_tags_nand(dev, chunk, NULL, &tags);
-+ dev->tags_used++;
-+ } else {
-+ dev->summary_used++;
-+ }
-+
-+ /* Let's have a good look at this chunk... */
-+
-+ if (!tags.chunk_used) {
-+ /* An unassigned chunk in the block.
-+ * If there are used chunks after this one, then
-+ * it is a chunk that was skipped due to failing
-+ * the erased check. Just skip it so that it can
-+ * be deleted.
-+ * But, more typically, We get here when this is
-+ * an unallocated chunk and his means that
-+ * either the block is empty or this is the one
-+ * being allocated from
-+ */
-+
-+ if (*found_chunks) {
-+ /* This is a chunk that was skipped due
-+ * to failing the erased check */
-+ } else if (chunk_in_block == 0) {
-+ /* We're looking at the first chunk in
-+ * the block so the block is unused */
-+ bi->block_state = YAFFS_BLOCK_STATE_EMPTY;
-+ dev->n_erased_blocks++;
-+ } else {
-+ if (bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCAN ||
-+ bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING) {
-+ if (dev->seq_number == bi->seq_number) {
-+ /* Allocating from this block*/
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ " Allocating from %d %d",
-+ blk, chunk_in_block);
-+
-+ bi->block_state =
-+ YAFFS_BLOCK_STATE_ALLOCATING;
-+ dev->alloc_block = blk;
-+ dev->alloc_page = chunk_in_block;
-+ dev->alloc_block_finder = blk;
-+ } else {
-+ /* This is a partially written block
-+ * that is not the current
-+ * allocation block.
-+ */
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ "Partially written block %d detected. gc will fix this.",
-+ blk);
-+ }
-+ }
-+ }
-+
-+ dev->n_free_chunks++;
-+
-+ } else if (tags.ecc_result ==
-+ YAFFS_ECC_RESULT_UNFIXED) {
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ " Unfixed ECC in chunk(%d:%d), chunk ignored",
-+ blk, chunk_in_block);
-+ dev->n_free_chunks++;
-+ } else if (tags.obj_id > YAFFS_MAX_OBJECT_ID ||
-+ tags.chunk_id > YAFFS_MAX_CHUNK_ID ||
-+ tags.obj_id == YAFFS_OBJECTID_SUMMARY ||
-+ (tags.chunk_id > 0 &&
-+ tags.n_bytes > dev->data_bytes_per_chunk) ||
-+ tags.seq_number != bi->seq_number) {
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ "Chunk (%d:%d) with bad tags:obj = %d, chunk_id = %d, n_bytes = %d, ignored",
-+ blk, chunk_in_block, tags.obj_id,
-+ tags.chunk_id, tags.n_bytes);
-+ dev->n_free_chunks++;
-+ } else if (tags.chunk_id > 0) {
-+ /* chunk_id > 0 so it is a data chunk... */
-+ loff_t endpos;
-+ loff_t chunk_base = (tags.chunk_id - 1) *
-+ dev->data_bytes_per_chunk;
-+
-+ *found_chunks = 1;
-+
-+ yaffs_set_chunk_bit(dev, blk, chunk_in_block);
-+ bi->pages_in_use++;
-+
-+ in = yaffs_find_or_create_by_number(dev,
-+ tags.obj_id,
-+ YAFFS_OBJECT_TYPE_FILE);
-+ if (!in)
-+ /* Out of memory */
-+ alloc_failed = 1;
-+
-+ if (in &&
-+ in->variant_type == YAFFS_OBJECT_TYPE_FILE &&
-+ chunk_base < in->variant.file_variant.shrink_size) {
-+ /* This has not been invalidated by
-+ * a resize */
-+ if (!yaffs_put_chunk_in_file(in, tags.chunk_id,
-+ chunk, -1))
-+ alloc_failed = 1;
-+
-+ /* File size is calculated by looking at
-+ * the data chunks if we have not
-+ * seen an object header yet.
-+ * Stop this practice once we find an
-+ * object header.
-+ */
-+ endpos = chunk_base + tags.n_bytes;
-+
-+ if (!in->valid &&
-+ in->variant.file_variant.scanned_size < endpos) {
-+ in->variant.file_variant.
-+ scanned_size = endpos;
-+ in->variant.file_variant.
-+ file_size = endpos;
-+ }
-+ } else if (in) {
-+ /* This chunk has been invalidated by a
-+ * resize, or a past file deletion
-+ * so delete the chunk*/
-+ yaffs_chunk_del(dev, chunk, 1, __LINE__);
-+ }
-+ } else {
-+ /* chunk_id == 0, so it is an ObjectHeader.
-+ * Thus, we read in the object header and make
-+ * the object
-+ */
-+ *found_chunks = 1;
-+
-+ yaffs_set_chunk_bit(dev, blk, chunk_in_block);
-+ bi->pages_in_use++;
-+
-+ oh = NULL;
-+ in = NULL;
-+
-+ if (tags.extra_available) {
-+ in = yaffs_find_or_create_by_number(dev,
-+ tags.obj_id,
-+ tags.extra_obj_type);
-+ if (!in)
-+ alloc_failed = 1;
-+ }
-+
-+ if (!in ||
-+ (!in->valid && dev->param.disable_lazy_load) ||
-+ tags.extra_shadows ||
-+ (!in->valid && (tags.obj_id == YAFFS_OBJECTID_ROOT ||
-+ tags.obj_id == YAFFS_OBJECTID_LOSTNFOUND))) {
-+
-+ /* If we don't have valid info then we
-+ * need to read the chunk
-+ * TODO In future we can probably defer
-+ * reading the chunk and living with
-+ * invalid data until needed.
-+ */
-+
-+ result = yaffs_rd_chunk_tags_nand(dev,
-+ chunk,
-+ chunk_data,
-+ NULL);
-+
-+ oh = (struct yaffs_obj_hdr *)chunk_data;
-+
-+ if (dev->param.inband_tags) {
-+ /* Fix up the header if they got
-+ * corrupted by inband tags */
-+ oh->shadows_obj =
-+ oh->inband_shadowed_obj_id;
-+ oh->is_shrink =
-+ oh->inband_is_shrink;
-+ }
-+
-+ if (!in) {
-+ in = yaffs_find_or_create_by_number(dev,
-+ tags.obj_id, oh->type);
-+ if (!in)
-+ alloc_failed = 1;
-+ }
-+ }
-+
-+ if (!in) {
-+ /* TODO Hoosterman we have a problem! */
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs tragedy: Could not make object for object %d at chunk %d during scan",
-+ tags.obj_id, chunk);
-+ return YAFFS_FAIL;
-+ }
-+
-+ if (in->valid) {
-+ /* We have already filled this one.
-+ * We have a duplicate that will be
-+ * discarded, but we first have to suck
-+ * out resize info if it is a file.
-+ */
-+ if ((in->variant_type == YAFFS_OBJECT_TYPE_FILE) &&
-+ ((oh && oh->type == YAFFS_OBJECT_TYPE_FILE) ||
-+ (tags.extra_available &&
-+ tags.extra_obj_type == YAFFS_OBJECT_TYPE_FILE)
-+ )) {
-+ loff_t this_size = (oh) ?
-+ yaffs_oh_to_size(oh) :
-+ tags.extra_file_size;
-+ u32 parent_obj_id = (oh) ?
-+ oh->parent_obj_id :
-+ tags.extra_parent_id;
-+
-+ is_shrink = (oh) ?
-+ oh->is_shrink :
-+ tags.extra_is_shrink;
-+
-+ /* If it is deleted (unlinked
-+ * at start also means deleted)
-+ * we treat the file size as
-+ * being zeroed at this point.
-+ */
-+ if (parent_obj_id == YAFFS_OBJECTID_DELETED ||
-+ parent_obj_id == YAFFS_OBJECTID_UNLINKED) {
-+ this_size = 0;
-+ is_shrink = 1;
-+ }
-+
-+ if (is_shrink &&
-+ in->variant.file_variant.shrink_size >
-+ this_size)
-+ in->variant.file_variant.shrink_size =
-+ this_size;
-+
-+ if (is_shrink)
-+ bi->has_shrink_hdr = 1;
-+ }
-+ /* Use existing - destroy this one. */
-+ yaffs_chunk_del(dev, chunk, 1, __LINE__);
-+ }
-+
-+ if (!in->valid && in->variant_type !=
-+ (oh ? oh->type : tags.extra_obj_type)) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs tragedy: Bad type, %d != %d, for object %d at chunk %d during scan",
-+ oh ? oh->type : tags.extra_obj_type,
-+ in->variant_type, tags.obj_id,
-+ chunk);
-+ in = yaffs_retype_obj(in, oh ? oh->type : tags.extra_obj_type);
-+ }
-+
-+ if (!in->valid &&
-+ (tags.obj_id == YAFFS_OBJECTID_ROOT ||
-+ tags.obj_id == YAFFS_OBJECTID_LOSTNFOUND)) {
-+ /* We only load some info, don't fiddle
-+ * with directory structure */
-+ in->valid = 1;
-+
-+ if (oh) {
-+ in->yst_mode = oh->yst_mode;
-+ yaffs_load_attribs(in, oh);
-+ in->lazy_loaded = 0;
-+ } else {
-+ in->lazy_loaded = 1;
-+ }
-+ in->hdr_chunk = chunk;
-+
-+ } else if (!in->valid) {
-+ /* we need to load this info */
-+ in->valid = 1;
-+ in->hdr_chunk = chunk;
-+ if (oh) {
-+ in->variant_type = oh->type;
-+ in->yst_mode = oh->yst_mode;
-+ yaffs_load_attribs(in, oh);
-+
-+ if (oh->shadows_obj > 0)
-+ yaffs_handle_shadowed_obj(dev,
-+ oh->shadows_obj, 1);
-+
-+ yaffs_set_obj_name_from_oh(in, oh);
-+ parent = yaffs_find_or_create_by_number(dev,
-+ oh->parent_obj_id,
-+ YAFFS_OBJECT_TYPE_DIRECTORY);
-+ file_size = yaffs_oh_to_size(oh);
-+ is_shrink = oh->is_shrink;
-+ equiv_id = oh->equiv_id;
-+ } else {
-+ in->variant_type = tags.extra_obj_type;
-+ parent = yaffs_find_or_create_by_number(dev,
-+ tags.extra_parent_id,
-+ YAFFS_OBJECT_TYPE_DIRECTORY);
-+ file_size = tags.extra_file_size;
-+ is_shrink = tags.extra_is_shrink;
-+ equiv_id = tags.extra_equiv_id;
-+ in->lazy_loaded = 1;
-+ }
-+ in->dirty = 0;
-+
-+ if (!parent)
-+ alloc_failed = 1;
-+
-+ /* directory stuff...
-+ * hook up to parent
-+ */
-+
-+ if (parent &&
-+ parent->variant_type == YAFFS_OBJECT_TYPE_UNKNOWN) {
-+ /* Set up as a directory */
-+ parent->variant_type =
-+ YAFFS_OBJECT_TYPE_DIRECTORY;
-+ INIT_LIST_HEAD(&parent->
-+ variant.dir_variant.children);
-+ } else if (!parent ||
-+ parent->variant_type !=
-+ YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ /* Hoosterman, another problem....
-+ * Trying to use a non-directory as a directory
-+ */
-+
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
-+ );
-+ parent = dev->lost_n_found;
-+ }
-+ yaffs_add_obj_to_dir(parent, in);
-+
-+ is_unlinked = (parent == dev->del_dir) ||
-+ (parent == dev->unlinked_dir);
-+
-+ if (is_shrink)
-+ /* Mark the block */
-+ bi->has_shrink_hdr = 1;
-+
-+ /* Note re hardlinks.
-+ * Since we might scan a hardlink before its equivalent
-+ * object is scanned we put them all in a list.
-+ * After scanning is complete, we should have all the
-+ * objects, so we run through this list and fix up all
-+ * the chains.
-+ */
-+
-+ switch (in->variant_type) {
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ /* Todo got a problem */
-+ break;
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ file_var = &in->variant.file_variant;
-+ if (file_var->scanned_size < file_size) {
-+ /* This covers the case where the file
-+ * size is greater than the data held.
-+ * This will happen if the file is
-+ * resized to be larger than its
-+ * current data extents.
-+ */
-+ file_var->file_size = file_size;
-+ file_var->scanned_size = file_size;
-+ }
-+
-+ if (file_var->shrink_size > file_size)
-+ file_var->shrink_size = file_size;
-+
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ hl_var = &in->variant.hardlink_variant;
-+ if (!is_unlinked) {
-+ hl_var->equiv_id = equiv_id;
-+ list_add(&in->hard_links, hard_list);
-+ }
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ /* Do nothing */
-+ break;
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ /* Do nothing */
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ sl_var = &in->variant.symlink_variant;
-+ if (oh) {
-+ sl_var->alias =
-+ yaffs_clone_str(oh->alias);
-+ if (!sl_var->alias)
-+ alloc_failed = 1;
-+ }
-+ break;
-+ }
-+ }
-+ }
-+ return alloc_failed ? YAFFS_FAIL : YAFFS_OK;
-+}
-+
-+int yaffs2_scan_backwards(struct yaffs_dev *dev)
-+{
-+ int blk;
-+ int block_iter;
-+ int start_iter;
-+ int end_iter;
-+ int n_to_scan = 0;
-+ enum yaffs_block_state state;
-+ int c;
-+ int deleted;
-+ LIST_HEAD(hard_list);
-+ struct yaffs_block_info *bi;
-+ u32 seq_number;
-+ int n_blocks = dev->internal_end_block - dev->internal_start_block + 1;
-+ u8 *chunk_data;
-+ int found_chunks;
-+ int alloc_failed = 0;
-+ struct yaffs_block_index *block_index = NULL;
-+ int alt_block_index = 0;
-+ int summary_available;
-+
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ "yaffs2_scan_backwards starts intstartblk %d intendblk %d...",
-+ dev->internal_start_block, dev->internal_end_block);
-+
-+ dev->seq_number = YAFFS_LOWEST_SEQUENCE_NUMBER;
-+
-+ block_index =
-+ kmalloc(n_blocks * sizeof(struct yaffs_block_index), GFP_NOFS);
-+
-+ if (!block_index) {
-+ block_index =
-+ vmalloc(n_blocks * sizeof(struct yaffs_block_index));
-+ alt_block_index = 1;
-+ }
-+
-+ if (!block_index) {
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ "yaffs2_scan_backwards() could not allocate block index!"
-+ );
-+ return YAFFS_FAIL;
-+ }
-+
-+ dev->blocks_in_checkpt = 0;
-+
-+ chunk_data = yaffs_get_temp_buffer(dev);
-+
-+ /* Scan all the blocks to determine their state */
-+ bi = dev->block_info;
-+ for (blk = dev->internal_start_block; blk <= dev->internal_end_block;
-+ blk++) {
-+ yaffs_clear_chunk_bits(dev, blk);
-+ bi->pages_in_use = 0;
-+ bi->soft_del_pages = 0;
-+
-+ yaffs_query_init_block_state(dev, blk, &state, &seq_number);
-+
-+ bi->block_state = state;
-+ bi->seq_number = seq_number;
-+
-+ if (bi->seq_number == YAFFS_SEQUENCE_CHECKPOINT_DATA)
-+ bi->block_state = YAFFS_BLOCK_STATE_CHECKPOINT;
-+ if (bi->seq_number == YAFFS_SEQUENCE_BAD_BLOCK)
-+ bi->block_state = YAFFS_BLOCK_STATE_DEAD;
-+
-+ yaffs_trace(YAFFS_TRACE_SCAN_DEBUG,
-+ "Block scanning block %d state %d seq %d",
-+ blk, bi->block_state, seq_number);
-+
-+ if (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT) {
-+ dev->blocks_in_checkpt++;
-+
-+ } else if (bi->block_state == YAFFS_BLOCK_STATE_DEAD) {
-+ yaffs_trace(YAFFS_TRACE_BAD_BLOCKS,
-+ "block %d is bad", blk);
-+ } else if (bi->block_state == YAFFS_BLOCK_STATE_EMPTY) {
-+ yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, "Block empty ");
-+ dev->n_erased_blocks++;
-+ dev->n_free_chunks += dev->param.chunks_per_block;
-+ } else if (bi->block_state ==
-+ YAFFS_BLOCK_STATE_NEEDS_SCAN) {
-+ /* Determine the highest sequence number */
-+ if (seq_number >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
-+ seq_number < YAFFS_HIGHEST_SEQUENCE_NUMBER) {
-+ block_index[n_to_scan].seq = seq_number;
-+ block_index[n_to_scan].block = blk;
-+ n_to_scan++;
-+ if (seq_number >= dev->seq_number)
-+ dev->seq_number = seq_number;
-+ } else {
-+ /* TODO: Nasty sequence number! */
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ "Block scanning block %d has bad sequence number %d",
-+ blk, seq_number);
-+ }
-+ }
-+ bi++;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "%d blocks to be sorted...", n_to_scan);
-+
-+ cond_resched();
-+
-+ /* Sort the blocks by sequence number */
-+ sort(block_index, n_to_scan, sizeof(struct yaffs_block_index),
-+ yaffs2_ybicmp, NULL);
-+
-+ cond_resched();
-+
-+ yaffs_trace(YAFFS_TRACE_SCAN, "...done");
-+
-+ /* Now scan the blocks looking at the data. */
-+ start_iter = 0;
-+ end_iter = n_to_scan - 1;
-+ yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, "%d blocks to scan", n_to_scan);
-+
-+ /* For each block.... backwards */
-+ for (block_iter = end_iter;
-+ !alloc_failed && block_iter >= start_iter;
-+ block_iter--) {
-+ /* Cooperative multitasking! This loop can run for so
-+ long that watchdog timers expire. */
-+ cond_resched();
-+
-+ /* get the block to scan in the correct order */
-+ blk = block_index[block_iter].block;
-+ bi = yaffs_get_block_info(dev, blk);
-+ deleted = 0;
-+
-+ summary_available = yaffs_summary_read(dev, dev->sum_tags, blk);
-+
-+ /* For each chunk in each block that needs scanning.... */
-+ found_chunks = 0;
-+ if (summary_available)
-+ c = dev->chunks_per_summary - 1;
-+ else
-+ c = dev->param.chunks_per_block - 1;
-+
-+ for (/* c is already initialised */;
-+ !alloc_failed && c >= 0 &&
-+ (bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCAN ||
-+ bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING);
-+ c--) {
-+ /* Scan backwards...
-+ * Read the tags and decide what to do
-+ */
-+ if (yaffs2_scan_chunk(dev, bi, blk, c,
-+ &found_chunks, chunk_data,
-+ &hard_list, summary_available) ==
-+ YAFFS_FAIL)
-+ alloc_failed = 1;
-+ }
-+
-+ if (bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCAN) {
-+ /* If we got this far while scanning, then the block
-+ * is fully allocated. */
-+ bi->block_state = YAFFS_BLOCK_STATE_FULL;
-+ }
-+
-+ /* Now let's see if it was dirty */
-+ if (bi->pages_in_use == 0 &&
-+ !bi->has_shrink_hdr &&
-+ bi->block_state == YAFFS_BLOCK_STATE_FULL) {
-+ yaffs_block_became_dirty(dev, blk);
-+ }
-+ }
-+
-+ yaffs_skip_rest_of_block(dev);
-+
-+ if (alt_block_index)
-+ vfree(block_index);
-+ else
-+ kfree(block_index);
-+
-+ /* Ok, we've done all the scanning.
-+ * Fix up the hard link chains.
-+ * We have scanned all the objects, now it's time to add these
-+ * hardlinks.
-+ */
-+ yaffs_link_fixup(dev, &hard_list);
-+
-+ yaffs_release_temp_buffer(dev, chunk_data);
-+
-+ if (alloc_failed)
-+ return YAFFS_FAIL;
-+
-+ yaffs_trace(YAFFS_TRACE_SCAN, "yaffs2_scan_backwards ends");
-+
-+ return YAFFS_OK;
-+}
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yaffs_yaffs2.h linux-3.12.20/fs/yaffs2/yaffs_yaffs2.h
---- linux-3.12.20.orig/fs/yaffs2/yaffs_yaffs2.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yaffs_yaffs2.h 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,39 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_YAFFS2_H__
-+#define __YAFFS_YAFFS2_H__
-+
-+#include "yaffs_guts.h"
-+
-+void yaffs_calc_oldest_dirty_seq(struct yaffs_dev *dev);
-+void yaffs2_find_oldest_dirty_seq(struct yaffs_dev *dev);
-+void yaffs2_clear_oldest_dirty_seq(struct yaffs_dev *dev,
-+ struct yaffs_block_info *bi);
-+void yaffs2_update_oldest_dirty_seq(struct yaffs_dev *dev, unsigned block_no,
-+ struct yaffs_block_info *bi);
-+int yaffs_block_ok_for_gc(struct yaffs_dev *dev, struct yaffs_block_info *bi);
-+u32 yaffs2_find_refresh_block(struct yaffs_dev *dev);
-+int yaffs2_checkpt_required(struct yaffs_dev *dev);
-+int yaffs_calc_checkpt_blocks_required(struct yaffs_dev *dev);
-+
-+void yaffs2_checkpt_invalidate(struct yaffs_dev *dev);
-+int yaffs2_checkpt_save(struct yaffs_dev *dev);
-+int yaffs2_checkpt_restore(struct yaffs_dev *dev);
-+
-+int yaffs2_handle_hole(struct yaffs_obj *obj, loff_t new_size);
-+int yaffs2_scan_backwards(struct yaffs_dev *dev);
-+
-+#endif
-diff -Nur linux-3.12.20.orig/fs/yaffs2/yportenv.h linux-3.12.20/fs/yaffs2/yportenv.h
---- linux-3.12.20.orig/fs/yaffs2/yportenv.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.12.20/fs/yaffs2/yportenv.h 2014-05-17 11:28:49.000000000 +0200
-@@ -0,0 +1,85 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YPORTENV_H__
-+#define __YPORTENV_H__
-+
-+/*
-+ * Define the MTD version in terms of Linux Kernel versions
-+ * This allows yaffs to be used independantly of the kernel
-+ * as well as with it.
-+ */
-+
-+#define MTD_VERSION(a, b, c) (((a) << 16) + ((b) << 8) + (c))
-+
-+#ifdef YAFFS_OUT_OF_TREE
-+#include "moduleconfig.h"
-+#endif
-+
-+#include <linux/version.h>
-+#define MTD_VERSION_CODE LINUX_VERSION_CODE
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
-+#include <linux/config.h>
-+#endif
-+#include <linux/version.h>
-+#include <linux/kernel.h>
-+#include <linux/mm.h>
-+#include <linux/sched.h>
-+#include <linux/string.h>
-+#include <linux/slab.h>
-+#include <linux/vmalloc.h>
-+#include <linux/xattr.h>
-+#include <linux/list.h>
-+#include <linux/types.h>
-+#include <linux/fs.h>
-+#include <linux/stat.h>
-+#include <linux/sort.h>
-+#include <linux/bitops.h>
-+
-+/* These type wrappings are used to support Unicode names in WinCE. */
-+#define YCHAR char
-+#define YUCHAR unsigned char
-+#define _Y(x) x
-+
-+#define YAFFS_LOSTNFOUND_NAME "lost+found"
-+#define YAFFS_LOSTNFOUND_PREFIX "obj"
-+
-+
-+#define YAFFS_ROOT_MODE 0755
-+#define YAFFS_LOSTNFOUND_MODE 0700
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+#define Y_CURRENT_TIME CURRENT_TIME.tv_sec
-+#define Y_TIME_CONVERT(x) (x).tv_sec
-+#else
-+#define Y_CURRENT_TIME CURRENT_TIME
-+#define Y_TIME_CONVERT(x) (x)
-+#endif
-+
-+#define compile_time_assertion(assertion) \
-+ ({ int x = __builtin_choose_expr(assertion, 0, (void)0); (void) x; })
-+
-+
-+#define yaffs_printf(msk, fmt, ...) \
-+ printk(KERN_DEBUG "yaffs: " fmt "\n", ##__VA_ARGS__)
-+
-+#define yaffs_trace(msk, fmt, ...) do { \
-+ if (yaffs_trace_mask & (msk)) \
-+ printk(KERN_DEBUG "yaffs: " fmt "\n", ##__VA_ARGS__); \
-+} while (0)
-+
-+
-+#endif
diff --git a/target/linux/patches/3.18.44/yaffs2.patch b/target/linux/patches/3.18.44/yaffs2.patch
deleted file mode 100644
index 2ade5bf7e..000000000
--- a/target/linux/patches/3.18.44/yaffs2.patch
+++ /dev/null
@@ -1,16559 +0,0 @@
-diff -Nur linux-3.18.14.orig/fs/Kconfig linux-3.18.14/fs/Kconfig
---- linux-3.18.14.orig/fs/Kconfig 2015-05-20 17:04:50.000000000 +0200
-+++ linux-3.18.14/fs/Kconfig 2015-06-14 21:22:55.000000000 +0200
-@@ -191,6 +191,7 @@
- source "fs/befs/Kconfig"
- source "fs/bfs/Kconfig"
- source "fs/efs/Kconfig"
-+source "fs/yaffs2/Kconfig"
- source "fs/jffs2/Kconfig"
- # UBIFS File system configuration
- source "fs/ubifs/Kconfig"
-diff -Nur linux-3.18.14.orig/fs/Makefile linux-3.18.14/fs/Makefile
---- linux-3.18.14.orig/fs/Makefile 2015-05-20 17:04:50.000000000 +0200
-+++ linux-3.18.14/fs/Makefile 2015-06-14 21:22:55.000000000 +0200
-@@ -126,3 +126,4 @@
- obj-$(CONFIG_CEPH_FS) += ceph/
- obj-$(CONFIG_PSTORE) += pstore/
- obj-$(CONFIG_EFIVAR_FS) += efivarfs/
-+obj-$(CONFIG_YAFFS_FS) += yaffs2/
-diff -Nur linux-3.18.14.orig/fs/yaffs2/Kconfig linux-3.18.14/fs/yaffs2/Kconfig
---- linux-3.18.14.orig/fs/yaffs2/Kconfig 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/Kconfig 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,171 @@
-+#
-+# yaffs file system configurations
-+#
-+
-+config YAFFS_FS
-+ tristate "yaffs2 file system support"
-+ default n
-+ depends on MTD_BLOCK
-+ select YAFFS_YAFFS1
-+ select YAFFS_YAFFS2
-+ help
-+ yaffs2, or Yet Another Flash File System, is a file system
-+ optimised for NAND Flash chips.
-+
-+ To compile the yaffs2 file system support as a module, choose M
-+ here: the module will be called yaffs2.
-+
-+ If unsure, say N.
-+
-+ Further information on yaffs2 is available at
-+ <http://www.aleph1.co.uk/yaffs/>.
-+
-+config YAFFS_YAFFS1
-+ bool "512 byte / page devices"
-+ depends on YAFFS_FS
-+ default y
-+ help
-+ Enable yaffs1 support -- yaffs for 512 byte / page devices
-+
-+ Not needed for 2K-page devices.
-+
-+ If unsure, say Y.
-+
-+config YAFFS_9BYTE_TAGS
-+ bool "Use older-style on-NAND data format with pageStatus byte"
-+ depends on YAFFS_YAFFS1
-+ default n
-+ help
-+
-+ Older-style on-NAND data format has a "pageStatus" byte to record
-+ chunk/page state. This byte is zero when the page is discarded.
-+ Choose this option if you have existing on-NAND data using this
-+ format that you need to continue to support. New data written
-+ also uses the older-style format. Note: Use of this option
-+ generally requires that MTD's oob layout be adjusted to use the
-+ older-style format. See notes on tags formats and MTD versions
-+ in yaffs_mtdif1.c.
-+
-+ If unsure, say N.
-+
-+config YAFFS_DOES_ECC
-+ bool "Lets yaffs do its own ECC"
-+ depends on YAFFS_FS && YAFFS_YAFFS1 && !YAFFS_9BYTE_TAGS
-+ default n
-+ help
-+ This enables yaffs to use its own ECC functions instead of using
-+ the ones from the generic MTD-NAND driver.
-+
-+ If unsure, say N.
-+
-+config YAFFS_ECC_WRONG_ORDER
-+ bool "Use the same ecc byte order as Steven Hill's nand_ecc.c"
-+ depends on YAFFS_FS && YAFFS_DOES_ECC && !YAFFS_9BYTE_TAGS
-+ default n
-+ help
-+ This makes yaffs_ecc.c use the same ecc byte order as Steven
-+ Hill's nand_ecc.c. If not set, then you get the same ecc byte
-+ order as SmartMedia.
-+
-+ If unsure, say N.
-+
-+config YAFFS_YAFFS2
-+ bool "2048 byte (or larger) / page devices"
-+ depends on YAFFS_FS
-+ default y
-+ help
-+ Enable yaffs2 support -- yaffs for >= 2K bytes per page devices
-+
-+ If unsure, say Y.
-+
-+config YAFFS_AUTO_YAFFS2
-+ bool "Autoselect yaffs2 format"
-+ depends on YAFFS_YAFFS2
-+ default y
-+ help
-+ Without this, you need to explicitely use yaffs2 as the file
-+ system type. With this, you can say "yaffs" and yaffs or yaffs2
-+ will be used depending on the device page size (yaffs on
-+ 512-byte page devices, yaffs2 on 2K page devices).
-+
-+ If unsure, say Y.
-+
-+config YAFFS_DISABLE_TAGS_ECC
-+ bool "Disable yaffs from doing ECC on tags by default"
-+ depends on YAFFS_FS && YAFFS_YAFFS2
-+ default n
-+ help
-+ This defaults yaffs to using its own ECC calculations on tags instead of
-+ just relying on the MTD.
-+ This behavior can also be overridden with tags_ecc_on and
-+ tags_ecc_off mount options.
-+
-+ If unsure, say N.
-+
-+config YAFFS_ALWAYS_CHECK_CHUNK_ERASED
-+ bool "Force chunk erase check"
-+ depends on YAFFS_FS
-+ default n
-+ help
-+ Normally yaffs only checks chunks before writing until an erased
-+ chunk is found. This helps to detect any partially written
-+ chunks that might have happened due to power loss.
-+
-+ Enabling this forces on the test that chunks are erased in flash
-+ before writing to them. This takes more time but is potentially
-+ a bit more secure.
-+
-+ Suggest setting Y during development and ironing out driver
-+ issues etc. Suggest setting to N if you want faster writing.
-+
-+ If unsure, say Y.
-+
-+config YAFFS_EMPTY_LOST_AND_FOUND
-+ bool "Empty lost and found on boot"
-+ depends on YAFFS_FS
-+ default n
-+ help
-+ If this is enabled then the contents of lost and found is
-+ automatically dumped at mount.
-+
-+ If unsure, say N.
-+
-+config YAFFS_DISABLE_BLOCK_REFRESHING
-+ bool "Disable yaffs2 block refreshing"
-+ depends on YAFFS_FS
-+ default n
-+ help
-+ If this is set, then block refreshing is disabled.
-+ Block refreshing infrequently refreshes the oldest block in
-+ a yaffs2 file system. This mechanism helps to refresh flash to
-+ mitigate against data loss. This is particularly useful for MLC.
-+
-+ If unsure, say N.
-+
-+config YAFFS_DISABLE_BACKGROUND
-+ bool "Disable yaffs2 background processing"
-+ depends on YAFFS_FS
-+ default n
-+ help
-+ If this is set, then background processing is disabled.
-+ Background processing makes many foreground activities faster.
-+
-+ If unsure, say N.
-+
-+config YAFFS_DISABLE_BAD_BLOCK_MARKING
-+ bool "Disable yaffs2 bad block marking"
-+ depends on YAFFS_FS
-+ default n
-+ help
-+ Useful during early flash bring up to prevent problems causing
-+ lots of bad block marking.
-+
-+ If unsure, say N.
-+
-+config YAFFS_XATTR
-+ bool "Enable yaffs2 xattr support"
-+ depends on YAFFS_FS
-+ default y
-+ help
-+ If this is set then yaffs2 will provide xattr support.
-+ If unsure, say Y.
-diff -Nur linux-3.18.14.orig/fs/yaffs2/Makefile linux-3.18.14/fs/yaffs2/Makefile
---- linux-3.18.14.orig/fs/yaffs2/Makefile 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/Makefile 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,18 @@
-+#
-+# Makefile for the linux YAFFS filesystem routines.
-+#
-+
-+obj-$(CONFIG_YAFFS_FS) += yaffs.o
-+
-+yaffs-y := yaffs_ecc.o yaffs_vfs.o yaffs_guts.o yaffs_checkptrw.o
-+yaffs-y += yaffs_packedtags1.o yaffs_packedtags2.o yaffs_nand.o
-+yaffs-y += yaffs_tagscompat.o yaffs_tagsmarshall.o
-+yaffs-y += yaffs_mtdif.o
-+yaffs-y += yaffs_nameval.o yaffs_attribs.o
-+yaffs-y += yaffs_allocator.o
-+yaffs-y += yaffs_yaffs1.o
-+yaffs-y += yaffs_yaffs2.o
-+yaffs-y += yaffs_bitmap.o
-+yaffs-y += yaffs_summary.o
-+yaffs-y += yaffs_verify.o
-+
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_allocator.c linux-3.18.14/fs/yaffs2/yaffs_allocator.c
---- linux-3.18.14.orig/fs/yaffs2/yaffs_allocator.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_allocator.c 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,357 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_allocator.h"
-+#include "yaffs_guts.h"
-+#include "yaffs_trace.h"
-+#include "yportenv.h"
-+
-+/*
-+ * Each entry in yaffs_tnode_list and yaffs_obj_list hold blocks
-+ * of approx 100 objects that are themn allocated singly.
-+ * This is basically a simplified slab allocator.
-+ *
-+ * We don't use the Linux slab allocator because slab does not allow
-+ * us to dump all the objects in one hit when we do a umount and tear
-+ * down all the tnodes and objects. slab requires that we first free
-+ * the individual objects.
-+ *
-+ * Once yaffs has been mainlined I shall try to motivate for a change
-+ * to slab to provide the extra features we need here.
-+ */
-+
-+struct yaffs_tnode_list {
-+ struct yaffs_tnode_list *next;
-+ struct yaffs_tnode *tnodes;
-+};
-+
-+struct yaffs_obj_list {
-+ struct yaffs_obj_list *next;
-+ struct yaffs_obj *objects;
-+};
-+
-+struct yaffs_allocator {
-+ int n_tnodes_created;
-+ struct yaffs_tnode *free_tnodes;
-+ int n_free_tnodes;
-+ struct yaffs_tnode_list *alloc_tnode_list;
-+
-+ int n_obj_created;
-+ struct list_head free_objs;
-+ int n_free_objects;
-+
-+ struct yaffs_obj_list *allocated_obj_list;
-+};
-+
-+static void yaffs_deinit_raw_tnodes(struct yaffs_dev *dev)
-+{
-+ struct yaffs_allocator *allocator =
-+ (struct yaffs_allocator *)dev->allocator;
-+ struct yaffs_tnode_list *tmp;
-+
-+ if (!allocator) {
-+ BUG();
-+ return;
-+ }
-+
-+ while (allocator->alloc_tnode_list) {
-+ tmp = allocator->alloc_tnode_list->next;
-+
-+ kfree(allocator->alloc_tnode_list->tnodes);
-+ kfree(allocator->alloc_tnode_list);
-+ allocator->alloc_tnode_list = tmp;
-+ }
-+
-+ allocator->free_tnodes = NULL;
-+ allocator->n_free_tnodes = 0;
-+ allocator->n_tnodes_created = 0;
-+}
-+
-+static void yaffs_init_raw_tnodes(struct yaffs_dev *dev)
-+{
-+ struct yaffs_allocator *allocator = dev->allocator;
-+
-+ if (!allocator) {
-+ BUG();
-+ return;
-+ }
-+
-+ allocator->alloc_tnode_list = NULL;
-+ allocator->free_tnodes = NULL;
-+ allocator->n_free_tnodes = 0;
-+ allocator->n_tnodes_created = 0;
-+}
-+
-+static int yaffs_create_tnodes(struct yaffs_dev *dev, int n_tnodes)
-+{
-+ struct yaffs_allocator *allocator =
-+ (struct yaffs_allocator *)dev->allocator;
-+ int i;
-+ struct yaffs_tnode *new_tnodes;
-+ u8 *mem;
-+ struct yaffs_tnode *curr;
-+ struct yaffs_tnode *next;
-+ struct yaffs_tnode_list *tnl;
-+
-+ if (!allocator) {
-+ BUG();
-+ return YAFFS_FAIL;
-+ }
-+
-+ if (n_tnodes < 1)
-+ return YAFFS_OK;
-+
-+ /* make these things */
-+ new_tnodes = kmalloc(n_tnodes * dev->tnode_size, GFP_NOFS);
-+ mem = (u8 *) new_tnodes;
-+
-+ if (!new_tnodes) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs: Could not allocate Tnodes");
-+ return YAFFS_FAIL;
-+ }
-+
-+ /* New hookup for wide tnodes */
-+ for (i = 0; i < n_tnodes - 1; i++) {
-+ curr = (struct yaffs_tnode *)&mem[i * dev->tnode_size];
-+ next = (struct yaffs_tnode *)&mem[(i + 1) * dev->tnode_size];
-+ curr->internal[0] = next;
-+ }
-+
-+ curr = (struct yaffs_tnode *)&mem[(n_tnodes - 1) * dev->tnode_size];
-+ curr->internal[0] = allocator->free_tnodes;
-+ allocator->free_tnodes = (struct yaffs_tnode *)mem;
-+
-+ allocator->n_free_tnodes += n_tnodes;
-+ allocator->n_tnodes_created += n_tnodes;
-+
-+ /* Now add this bunch of tnodes to a list for freeing up.
-+ * NB If we can't add this to the management list it isn't fatal
-+ * but it just means we can't free this bunch of tnodes later.
-+ */
-+ tnl = kmalloc(sizeof(struct yaffs_tnode_list), GFP_NOFS);
-+ if (!tnl) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "Could not add tnodes to management list");
-+ return YAFFS_FAIL;
-+ } else {
-+ tnl->tnodes = new_tnodes;
-+ tnl->next = allocator->alloc_tnode_list;
-+ allocator->alloc_tnode_list = tnl;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_ALLOCATE, "Tnodes added");
-+
-+ return YAFFS_OK;
-+}
-+
-+struct yaffs_tnode *yaffs_alloc_raw_tnode(struct yaffs_dev *dev)
-+{
-+ struct yaffs_allocator *allocator =
-+ (struct yaffs_allocator *)dev->allocator;
-+ struct yaffs_tnode *tn = NULL;
-+
-+ if (!allocator) {
-+ BUG();
-+ return NULL;
-+ }
-+
-+ /* If there are none left make more */
-+ if (!allocator->free_tnodes)
-+ yaffs_create_tnodes(dev, YAFFS_ALLOCATION_NTNODES);
-+
-+ if (allocator->free_tnodes) {
-+ tn = allocator->free_tnodes;
-+ allocator->free_tnodes = allocator->free_tnodes->internal[0];
-+ allocator->n_free_tnodes--;
-+ }
-+
-+ return tn;
-+}
-+
-+/* FreeTnode frees up a tnode and puts it back on the free list */
-+void yaffs_free_raw_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn)
-+{
-+ struct yaffs_allocator *allocator = dev->allocator;
-+
-+ if (!allocator) {
-+ BUG();
-+ return;
-+ }
-+
-+ if (tn) {
-+ tn->internal[0] = allocator->free_tnodes;
-+ allocator->free_tnodes = tn;
-+ allocator->n_free_tnodes++;
-+ }
-+ dev->checkpoint_blocks_required = 0; /* force recalculation */
-+}
-+
-+/*--------------- yaffs_obj alloaction ------------------------
-+ *
-+ * Free yaffs_objs are stored in a list using obj->siblings.
-+ * The blocks of allocated objects are stored in a linked list.
-+ */
-+
-+static void yaffs_init_raw_objs(struct yaffs_dev *dev)
-+{
-+ struct yaffs_allocator *allocator = dev->allocator;
-+
-+ if (!allocator) {
-+ BUG();
-+ return;
-+ }
-+
-+ allocator->allocated_obj_list = NULL;
-+ INIT_LIST_HEAD(&allocator->free_objs);
-+ allocator->n_free_objects = 0;
-+}
-+
-+static void yaffs_deinit_raw_objs(struct yaffs_dev *dev)
-+{
-+ struct yaffs_allocator *allocator = dev->allocator;
-+ struct yaffs_obj_list *tmp;
-+
-+ if (!allocator) {
-+ BUG();
-+ return;
-+ }
-+
-+ while (allocator->allocated_obj_list) {
-+ tmp = allocator->allocated_obj_list->next;
-+ kfree(allocator->allocated_obj_list->objects);
-+ kfree(allocator->allocated_obj_list);
-+ allocator->allocated_obj_list = tmp;
-+ }
-+
-+ INIT_LIST_HEAD(&allocator->free_objs);
-+ allocator->n_free_objects = 0;
-+ allocator->n_obj_created = 0;
-+}
-+
-+static int yaffs_create_free_objs(struct yaffs_dev *dev, int n_obj)
-+{
-+ struct yaffs_allocator *allocator = dev->allocator;
-+ int i;
-+ struct yaffs_obj *new_objs;
-+ struct yaffs_obj_list *list;
-+
-+ if (!allocator) {
-+ BUG();
-+ return YAFFS_FAIL;
-+ }
-+
-+ if (n_obj < 1)
-+ return YAFFS_OK;
-+
-+ /* make these things */
-+ new_objs = kmalloc(n_obj * sizeof(struct yaffs_obj), GFP_NOFS);
-+ list = kmalloc(sizeof(struct yaffs_obj_list), GFP_NOFS);
-+
-+ if (!new_objs || !list) {
-+ kfree(new_objs);
-+ new_objs = NULL;
-+ kfree(list);
-+ list = NULL;
-+ yaffs_trace(YAFFS_TRACE_ALLOCATE,
-+ "Could not allocate more objects");
-+ return YAFFS_FAIL;
-+ }
-+
-+ /* Hook them into the free list */
-+ for (i = 0; i < n_obj; i++)
-+ list_add(&new_objs[i].siblings, &allocator->free_objs);
-+
-+ allocator->n_free_objects += n_obj;
-+ allocator->n_obj_created += n_obj;
-+
-+ /* Now add this bunch of Objects to a list for freeing up. */
-+
-+ list->objects = new_objs;
-+ list->next = allocator->allocated_obj_list;
-+ allocator->allocated_obj_list = list;
-+
-+ return YAFFS_OK;
-+}
-+
-+struct yaffs_obj *yaffs_alloc_raw_obj(struct yaffs_dev *dev)
-+{
-+ struct yaffs_obj *obj = NULL;
-+ struct list_head *lh;
-+ struct yaffs_allocator *allocator = dev->allocator;
-+
-+ if (!allocator) {
-+ BUG();
-+ return obj;
-+ }
-+
-+ /* If there are none left make more */
-+ if (list_empty(&allocator->free_objs))
-+ yaffs_create_free_objs(dev, YAFFS_ALLOCATION_NOBJECTS);
-+
-+ if (!list_empty(&allocator->free_objs)) {
-+ lh = allocator->free_objs.next;
-+ obj = list_entry(lh, struct yaffs_obj, siblings);
-+ list_del_init(lh);
-+ allocator->n_free_objects--;
-+ }
-+
-+ return obj;
-+}
-+
-+void yaffs_free_raw_obj(struct yaffs_dev *dev, struct yaffs_obj *obj)
-+{
-+
-+ struct yaffs_allocator *allocator = dev->allocator;
-+
-+ if (!allocator) {
-+ BUG();
-+ return;
-+ }
-+
-+ /* Link into the free list. */
-+ list_add(&obj->siblings, &allocator->free_objs);
-+ allocator->n_free_objects++;
-+}
-+
-+void yaffs_deinit_raw_tnodes_and_objs(struct yaffs_dev *dev)
-+{
-+
-+ if (!dev->allocator) {
-+ BUG();
-+ return;
-+ }
-+
-+ yaffs_deinit_raw_tnodes(dev);
-+ yaffs_deinit_raw_objs(dev);
-+ kfree(dev->allocator);
-+ dev->allocator = NULL;
-+}
-+
-+void yaffs_init_raw_tnodes_and_objs(struct yaffs_dev *dev)
-+{
-+ struct yaffs_allocator *allocator;
-+
-+ if (dev->allocator) {
-+ BUG();
-+ return;
-+ }
-+
-+ allocator = kmalloc(sizeof(struct yaffs_allocator), GFP_NOFS);
-+ if (allocator) {
-+ dev->allocator = allocator;
-+ yaffs_init_raw_tnodes(dev);
-+ yaffs_init_raw_objs(dev);
-+ }
-+}
-+
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_allocator.h linux-3.18.14/fs/yaffs2/yaffs_allocator.h
---- linux-3.18.14.orig/fs/yaffs2/yaffs_allocator.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_allocator.h 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,30 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_ALLOCATOR_H__
-+#define __YAFFS_ALLOCATOR_H__
-+
-+#include "yaffs_guts.h"
-+
-+void yaffs_init_raw_tnodes_and_objs(struct yaffs_dev *dev);
-+void yaffs_deinit_raw_tnodes_and_objs(struct yaffs_dev *dev);
-+
-+struct yaffs_tnode *yaffs_alloc_raw_tnode(struct yaffs_dev *dev);
-+void yaffs_free_raw_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn);
-+
-+struct yaffs_obj *yaffs_alloc_raw_obj(struct yaffs_dev *dev);
-+void yaffs_free_raw_obj(struct yaffs_dev *dev, struct yaffs_obj *obj);
-+
-+#endif
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_attribs.c linux-3.18.14/fs/yaffs2/yaffs_attribs.c
---- linux-3.18.14.orig/fs/yaffs2/yaffs_attribs.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_attribs.c 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,132 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_guts.h"
-+#include "yaffs_attribs.h"
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 14, 0))
-+#define IATTR_UID ia_uid
-+#define IATTR_GID ia_gid
-+#else
-+#define IATTR_UID ia_uid.val
-+#define IATTR_GID ia_gid.val
-+#endif
-+
-+void yaffs_load_attribs(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh)
-+{
-+ obj->yst_uid = oh->yst_uid;
-+ obj->yst_gid = oh->yst_gid;
-+ obj->yst_atime = oh->yst_atime;
-+ obj->yst_mtime = oh->yst_mtime;
-+ obj->yst_ctime = oh->yst_ctime;
-+ obj->yst_rdev = oh->yst_rdev;
-+}
-+
-+void yaffs_load_attribs_oh(struct yaffs_obj_hdr *oh, struct yaffs_obj *obj)
-+{
-+ oh->yst_uid = obj->yst_uid;
-+ oh->yst_gid = obj->yst_gid;
-+ oh->yst_atime = obj->yst_atime;
-+ oh->yst_mtime = obj->yst_mtime;
-+ oh->yst_ctime = obj->yst_ctime;
-+ oh->yst_rdev = obj->yst_rdev;
-+
-+}
-+
-+void yaffs_load_current_time(struct yaffs_obj *obj, int do_a, int do_c)
-+{
-+ obj->yst_mtime = Y_CURRENT_TIME;
-+ if (do_a)
-+ obj->yst_atime = obj->yst_mtime;
-+ if (do_c)
-+ obj->yst_ctime = obj->yst_mtime;
-+}
-+
-+void yaffs_attribs_init(struct yaffs_obj *obj, u32 gid, u32 uid, u32 rdev)
-+{
-+ yaffs_load_current_time(obj, 1, 1);
-+ obj->yst_rdev = rdev;
-+ obj->yst_uid = uid;
-+ obj->yst_gid = gid;
-+}
-+
-+static loff_t yaffs_get_file_size(struct yaffs_obj *obj)
-+{
-+ YCHAR *alias = NULL;
-+ obj = yaffs_get_equivalent_obj(obj);
-+
-+ switch (obj->variant_type) {
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ return obj->variant.file_variant.file_size;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ alias = obj->variant.symlink_variant.alias;
-+ if (!alias)
-+ return 0;
-+ return strnlen(alias, YAFFS_MAX_ALIAS_LENGTH);
-+ default:
-+ return 0;
-+ }
-+}
-+
-+int yaffs_set_attribs(struct yaffs_obj *obj, struct iattr *attr)
-+{
-+ unsigned int valid = attr->ia_valid;
-+
-+ if (valid & ATTR_MODE)
-+ obj->yst_mode = attr->ia_mode;
-+ if (valid & ATTR_UID)
-+ obj->yst_uid = attr->IATTR_UID;
-+ if (valid & ATTR_GID)
-+ obj->yst_gid = attr->IATTR_GID;
-+
-+ if (valid & ATTR_ATIME)
-+ obj->yst_atime = Y_TIME_CONVERT(attr->ia_atime);
-+ if (valid & ATTR_CTIME)
-+ obj->yst_ctime = Y_TIME_CONVERT(attr->ia_ctime);
-+ if (valid & ATTR_MTIME)
-+ obj->yst_mtime = Y_TIME_CONVERT(attr->ia_mtime);
-+
-+ if (valid & ATTR_SIZE)
-+ yaffs_resize_file(obj, attr->ia_size);
-+
-+ yaffs_update_oh(obj, NULL, 1, 0, 0, NULL);
-+
-+ return YAFFS_OK;
-+
-+}
-+
-+int yaffs_get_attribs(struct yaffs_obj *obj, struct iattr *attr)
-+{
-+ unsigned int valid = 0;
-+
-+ attr->ia_mode = obj->yst_mode;
-+ valid |= ATTR_MODE;
-+ attr->IATTR_UID = obj->yst_uid;
-+ valid |= ATTR_UID;
-+ attr->IATTR_GID = obj->yst_gid;
-+ valid |= ATTR_GID;
-+
-+ Y_TIME_CONVERT(attr->ia_atime) = obj->yst_atime;
-+ valid |= ATTR_ATIME;
-+ Y_TIME_CONVERT(attr->ia_ctime) = obj->yst_ctime;
-+ valid |= ATTR_CTIME;
-+ Y_TIME_CONVERT(attr->ia_mtime) = obj->yst_mtime;
-+ valid |= ATTR_MTIME;
-+
-+ attr->ia_size = yaffs_get_file_size(obj);
-+ valid |= ATTR_SIZE;
-+
-+ attr->ia_valid = valid;
-+
-+ return YAFFS_OK;
-+}
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_attribs.h linux-3.18.14/fs/yaffs2/yaffs_attribs.h
---- linux-3.18.14.orig/fs/yaffs2/yaffs_attribs.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_attribs.h 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,28 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_ATTRIBS_H__
-+#define __YAFFS_ATTRIBS_H__
-+
-+#include "yaffs_guts.h"
-+
-+void yaffs_load_attribs(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh);
-+void yaffs_load_attribs_oh(struct yaffs_obj_hdr *oh, struct yaffs_obj *obj);
-+void yaffs_attribs_init(struct yaffs_obj *obj, u32 gid, u32 uid, u32 rdev);
-+void yaffs_load_current_time(struct yaffs_obj *obj, int do_a, int do_c);
-+int yaffs_set_attribs(struct yaffs_obj *obj, struct iattr *attr);
-+int yaffs_get_attribs(struct yaffs_obj *obj, struct iattr *attr);
-+
-+#endif
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_bitmap.c linux-3.18.14/fs/yaffs2/yaffs_bitmap.c
---- linux-3.18.14.orig/fs/yaffs2/yaffs_bitmap.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_bitmap.c 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,97 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_bitmap.h"
-+#include "yaffs_trace.h"
-+/*
-+ * Chunk bitmap manipulations
-+ */
-+
-+static inline u8 *yaffs_block_bits(struct yaffs_dev *dev, int blk)
-+{
-+ if (blk < dev->internal_start_block || blk > dev->internal_end_block) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "BlockBits block %d is not valid",
-+ blk);
-+ BUG();
-+ }
-+ return dev->chunk_bits +
-+ (dev->chunk_bit_stride * (blk - dev->internal_start_block));
-+}
-+
-+void yaffs_verify_chunk_bit_id(struct yaffs_dev *dev, int blk, int chunk)
-+{
-+ if (blk < dev->internal_start_block || blk > dev->internal_end_block ||
-+ chunk < 0 || chunk >= dev->param.chunks_per_block) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "Chunk Id (%d:%d) invalid",
-+ blk, chunk);
-+ BUG();
-+ }
-+}
-+
-+void yaffs_clear_chunk_bits(struct yaffs_dev *dev, int blk)
-+{
-+ u8 *blk_bits = yaffs_block_bits(dev, blk);
-+
-+ memset(blk_bits, 0, dev->chunk_bit_stride);
-+}
-+
-+void yaffs_clear_chunk_bit(struct yaffs_dev *dev, int blk, int chunk)
-+{
-+ u8 *blk_bits = yaffs_block_bits(dev, blk);
-+
-+ yaffs_verify_chunk_bit_id(dev, blk, chunk);
-+ blk_bits[chunk / 8] &= ~(1 << (chunk & 7));
-+}
-+
-+void yaffs_set_chunk_bit(struct yaffs_dev *dev, int blk, int chunk)
-+{
-+ u8 *blk_bits = yaffs_block_bits(dev, blk);
-+
-+ yaffs_verify_chunk_bit_id(dev, blk, chunk);
-+ blk_bits[chunk / 8] |= (1 << (chunk & 7));
-+}
-+
-+int yaffs_check_chunk_bit(struct yaffs_dev *dev, int blk, int chunk)
-+{
-+ u8 *blk_bits = yaffs_block_bits(dev, blk);
-+
-+ yaffs_verify_chunk_bit_id(dev, blk, chunk);
-+ return (blk_bits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0;
-+}
-+
-+int yaffs_still_some_chunks(struct yaffs_dev *dev, int blk)
-+{
-+ u8 *blk_bits = yaffs_block_bits(dev, blk);
-+ int i;
-+
-+ for (i = 0; i < dev->chunk_bit_stride; i++) {
-+ if (*blk_bits)
-+ return 1;
-+ blk_bits++;
-+ }
-+ return 0;
-+}
-+
-+int yaffs_count_chunk_bits(struct yaffs_dev *dev, int blk)
-+{
-+ u8 *blk_bits = yaffs_block_bits(dev, blk);
-+ int i;
-+ int n = 0;
-+
-+ for (i = 0; i < dev->chunk_bit_stride; i++, blk_bits++)
-+ n += hweight8(*blk_bits);
-+
-+ return n;
-+}
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_bitmap.h linux-3.18.14/fs/yaffs2/yaffs_bitmap.h
---- linux-3.18.14.orig/fs/yaffs2/yaffs_bitmap.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_bitmap.h 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,33 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+/*
-+ * Chunk bitmap manipulations
-+ */
-+
-+#ifndef __YAFFS_BITMAP_H__
-+#define __YAFFS_BITMAP_H__
-+
-+#include "yaffs_guts.h"
-+
-+void yaffs_verify_chunk_bit_id(struct yaffs_dev *dev, int blk, int chunk);
-+void yaffs_clear_chunk_bits(struct yaffs_dev *dev, int blk);
-+void yaffs_clear_chunk_bit(struct yaffs_dev *dev, int blk, int chunk);
-+void yaffs_set_chunk_bit(struct yaffs_dev *dev, int blk, int chunk);
-+int yaffs_check_chunk_bit(struct yaffs_dev *dev, int blk, int chunk);
-+int yaffs_still_some_chunks(struct yaffs_dev *dev, int blk);
-+int yaffs_count_chunk_bits(struct yaffs_dev *dev, int blk);
-+
-+#endif
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_checkptrw.c linux-3.18.14/fs/yaffs2/yaffs_checkptrw.c
---- linux-3.18.14.orig/fs/yaffs2/yaffs_checkptrw.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_checkptrw.c 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,466 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_checkptrw.h"
-+#include "yaffs_getblockinfo.h"
-+
-+struct yaffs_checkpt_chunk_hdr {
-+ int version;
-+ int seq;
-+ u32 sum;
-+ u32 xor;
-+} ;
-+
-+
-+static int apply_chunk_offset(struct yaffs_dev *dev, int chunk)
-+{
-+ return chunk - dev->chunk_offset;
-+}
-+
-+static int apply_block_offset(struct yaffs_dev *dev, int block)
-+{
-+ return block - dev->block_offset;
-+}
-+
-+static void yaffs2_checkpt_init_chunk_hdr(struct yaffs_dev *dev)
-+{
-+ struct yaffs_checkpt_chunk_hdr hdr;
-+
-+ hdr.version = YAFFS_CHECKPOINT_VERSION;
-+ hdr.seq = dev->checkpt_page_seq;
-+ hdr.sum = dev->checkpt_sum;
-+ hdr.xor = dev->checkpt_xor;
-+
-+ dev->checkpt_byte_offs = sizeof(hdr);
-+
-+ memcpy(dev->checkpt_buffer, &hdr, sizeof(hdr));
-+}
-+
-+static int yaffs2_checkpt_check_chunk_hdr(struct yaffs_dev *dev)
-+{
-+ struct yaffs_checkpt_chunk_hdr hdr;
-+
-+ memcpy(&hdr, dev->checkpt_buffer, sizeof(hdr));
-+
-+ dev->checkpt_byte_offs = sizeof(hdr);
-+
-+ return hdr.version == YAFFS_CHECKPOINT_VERSION &&
-+ hdr.seq == dev->checkpt_page_seq &&
-+ hdr.sum == dev->checkpt_sum &&
-+ hdr.xor == dev->checkpt_xor;
-+}
-+
-+static int yaffs2_checkpt_space_ok(struct yaffs_dev *dev)
-+{
-+ int blocks_avail = dev->n_erased_blocks - dev->param.n_reserved_blocks;
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "checkpt blocks_avail = %d", blocks_avail);
-+
-+ return (blocks_avail <= 0) ? 0 : 1;
-+}
-+
-+static int yaffs_checkpt_erase(struct yaffs_dev *dev)
-+{
-+ int i;
-+
-+ if (!dev->drv.drv_erase_fn)
-+ return 0;
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "checking blocks %d to %d",
-+ dev->internal_start_block, dev->internal_end_block);
-+
-+ for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, i);
-+ int offset_i = apply_block_offset(dev, i);
-+ int result;
-+
-+ if (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "erasing checkpt block %d", i);
-+
-+ dev->n_erasures++;
-+
-+ result = dev->drv.drv_erase_fn(dev, offset_i);
-+ if(result) {
-+ bi->block_state = YAFFS_BLOCK_STATE_EMPTY;
-+ dev->n_erased_blocks++;
-+ dev->n_free_chunks +=
-+ dev->param.chunks_per_block;
-+ } else {
-+ dev->drv.drv_mark_bad_fn(dev, offset_i);
-+ bi->block_state = YAFFS_BLOCK_STATE_DEAD;
-+ }
-+ }
-+ }
-+
-+ dev->blocks_in_checkpt = 0;
-+
-+ return 1;
-+}
-+
-+static void yaffs2_checkpt_find_erased_block(struct yaffs_dev *dev)
-+{
-+ int i;
-+ int blocks_avail = dev->n_erased_blocks - dev->param.n_reserved_blocks;
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "allocating checkpt block: erased %d reserved %d avail %d next %d ",
-+ dev->n_erased_blocks, dev->param.n_reserved_blocks,
-+ blocks_avail, dev->checkpt_next_block);
-+
-+ if (dev->checkpt_next_block >= 0 &&
-+ dev->checkpt_next_block <= dev->internal_end_block &&
-+ blocks_avail > 0) {
-+
-+ for (i = dev->checkpt_next_block; i <= dev->internal_end_block;
-+ i++) {
-+ struct yaffs_block_info *bi;
-+
-+ bi = yaffs_get_block_info(dev, i);
-+ if (bi->block_state == YAFFS_BLOCK_STATE_EMPTY) {
-+ dev->checkpt_next_block = i + 1;
-+ dev->checkpt_cur_block = i;
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "allocating checkpt block %d", i);
-+ return;
-+ }
-+ }
-+ }
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT, "out of checkpt blocks");
-+
-+ dev->checkpt_next_block = -1;
-+ dev->checkpt_cur_block = -1;
-+}
-+
-+static void yaffs2_checkpt_find_block(struct yaffs_dev *dev)
-+{
-+ int i;
-+ struct yaffs_ext_tags tags;
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "find next checkpt block: start: blocks %d next %d",
-+ dev->blocks_in_checkpt, dev->checkpt_next_block);
-+
-+ if (dev->blocks_in_checkpt < dev->checkpt_max_blocks)
-+ for (i = dev->checkpt_next_block; i <= dev->internal_end_block;
-+ i++) {
-+ int chunk = i * dev->param.chunks_per_block;
-+ enum yaffs_block_state state;
-+ u32 seq;
-+
-+ dev->tagger.read_chunk_tags_fn(dev,
-+ apply_chunk_offset(dev, chunk),
-+ NULL, &tags);
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "find next checkpt block: search: block %d state %d oid %d seq %d eccr %d",
-+ i, (int) state,
-+ tags.obj_id, tags.seq_number,
-+ tags.ecc_result);
-+
-+ if (tags.seq_number != YAFFS_SEQUENCE_CHECKPOINT_DATA)
-+ continue;
-+
-+ dev->tagger.query_block_fn(dev,
-+ apply_block_offset(dev, i),
-+ &state, &seq);
-+ if (state == YAFFS_BLOCK_STATE_DEAD)
-+ continue;
-+
-+ /* Right kind of block */
-+ dev->checkpt_next_block = tags.obj_id;
-+ dev->checkpt_cur_block = i;
-+ dev->checkpt_block_list[dev->blocks_in_checkpt] = i;
-+ dev->blocks_in_checkpt++;
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "found checkpt block %d", i);
-+ return;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT, "found no more checkpt blocks");
-+
-+ dev->checkpt_next_block = -1;
-+ dev->checkpt_cur_block = -1;
-+}
-+
-+int yaffs2_checkpt_open(struct yaffs_dev *dev, int writing)
-+{
-+ int i;
-+
-+ dev->checkpt_open_write = writing;
-+
-+ /* Got the functions we need? */
-+ if (!dev->tagger.write_chunk_tags_fn ||
-+ !dev->tagger.read_chunk_tags_fn ||
-+ !dev->drv.drv_erase_fn ||
-+ !dev->drv.drv_mark_bad_fn)
-+ return 0;
-+
-+ if (writing && !yaffs2_checkpt_space_ok(dev))
-+ return 0;
-+
-+ if (!dev->checkpt_buffer)
-+ dev->checkpt_buffer =
-+ kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS);
-+ if (!dev->checkpt_buffer)
-+ return 0;
-+
-+ dev->checkpt_page_seq = 0;
-+ dev->checkpt_byte_count = 0;
-+ dev->checkpt_sum = 0;
-+ dev->checkpt_xor = 0;
-+ dev->checkpt_cur_block = -1;
-+ dev->checkpt_cur_chunk = -1;
-+ dev->checkpt_next_block = dev->internal_start_block;
-+
-+ if (writing) {
-+ memset(dev->checkpt_buffer, 0, dev->data_bytes_per_chunk);
-+ yaffs2_checkpt_init_chunk_hdr(dev);
-+ return yaffs_checkpt_erase(dev);
-+ }
-+
-+ /* Opening for a read */
-+ /* Set to a value that will kick off a read */
-+ dev->checkpt_byte_offs = dev->data_bytes_per_chunk;
-+ /* A checkpoint block list of 1 checkpoint block per 16 block is
-+ * (hopefully) going to be way more than we need */
-+ dev->blocks_in_checkpt = 0;
-+ dev->checkpt_max_blocks =
-+ (dev->internal_end_block - dev->internal_start_block) / 16 + 2;
-+ if (!dev->checkpt_block_list)
-+ dev->checkpt_block_list =
-+ kmalloc(sizeof(int) * dev->checkpt_max_blocks, GFP_NOFS);
-+
-+ if (!dev->checkpt_block_list)
-+ return 0;
-+
-+ for (i = 0; i < dev->checkpt_max_blocks; i++)
-+ dev->checkpt_block_list[i] = -1;
-+
-+ return 1;
-+}
-+
-+int yaffs2_get_checkpt_sum(struct yaffs_dev *dev, u32 * sum)
-+{
-+ u32 composite_sum;
-+
-+ composite_sum = (dev->checkpt_sum << 8) | (dev->checkpt_xor & 0xff);
-+ *sum = composite_sum;
-+ return 1;
-+}
-+
-+static int yaffs2_checkpt_flush_buffer(struct yaffs_dev *dev)
-+{
-+ int chunk;
-+ int offset_chunk;
-+ struct yaffs_ext_tags tags;
-+
-+ if (dev->checkpt_cur_block < 0) {
-+ yaffs2_checkpt_find_erased_block(dev);
-+ dev->checkpt_cur_chunk = 0;
-+ }
-+
-+ if (dev->checkpt_cur_block < 0)
-+ return 0;
-+
-+ tags.is_deleted = 0;
-+ tags.obj_id = dev->checkpt_next_block; /* Hint to next place to look */
-+ tags.chunk_id = dev->checkpt_page_seq + 1;
-+ tags.seq_number = YAFFS_SEQUENCE_CHECKPOINT_DATA;
-+ tags.n_bytes = dev->data_bytes_per_chunk;
-+ if (dev->checkpt_cur_chunk == 0) {
-+ /* First chunk we write for the block? Set block state to
-+ checkpoint */
-+ struct yaffs_block_info *bi =
-+ yaffs_get_block_info(dev, dev->checkpt_cur_block);
-+ bi->block_state = YAFFS_BLOCK_STATE_CHECKPOINT;
-+ dev->blocks_in_checkpt++;
-+ }
-+
-+ chunk =
-+ dev->checkpt_cur_block * dev->param.chunks_per_block +
-+ dev->checkpt_cur_chunk;
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "checkpoint wite buffer nand %d(%d:%d) objid %d chId %d",
-+ chunk, dev->checkpt_cur_block, dev->checkpt_cur_chunk,
-+ tags.obj_id, tags.chunk_id);
-+
-+ offset_chunk = apply_chunk_offset(dev, chunk);
-+
-+ dev->n_page_writes++;
-+
-+ dev->tagger.write_chunk_tags_fn(dev, offset_chunk,
-+ dev->checkpt_buffer, &tags);
-+ dev->checkpt_page_seq++;
-+ dev->checkpt_cur_chunk++;
-+ if (dev->checkpt_cur_chunk >= dev->param.chunks_per_block) {
-+ dev->checkpt_cur_chunk = 0;
-+ dev->checkpt_cur_block = -1;
-+ }
-+ memset(dev->checkpt_buffer, 0, dev->data_bytes_per_chunk);
-+
-+ yaffs2_checkpt_init_chunk_hdr(dev);
-+
-+
-+ return 1;
-+}
-+
-+int yaffs2_checkpt_wr(struct yaffs_dev *dev, const void *data, int n_bytes)
-+{
-+ int i = 0;
-+ int ok = 1;
-+ u8 *data_bytes = (u8 *) data;
-+
-+ if (!dev->checkpt_buffer)
-+ return 0;
-+
-+ if (!dev->checkpt_open_write)
-+ return -1;
-+
-+ while (i < n_bytes && ok) {
-+ dev->checkpt_buffer[dev->checkpt_byte_offs] = *data_bytes;
-+ dev->checkpt_sum += *data_bytes;
-+ dev->checkpt_xor ^= *data_bytes;
-+
-+ dev->checkpt_byte_offs++;
-+ i++;
-+ data_bytes++;
-+ dev->checkpt_byte_count++;
-+
-+ if (dev->checkpt_byte_offs < 0 ||
-+ dev->checkpt_byte_offs >= dev->data_bytes_per_chunk)
-+ ok = yaffs2_checkpt_flush_buffer(dev);
-+ }
-+
-+ return i;
-+}
-+
-+int yaffs2_checkpt_rd(struct yaffs_dev *dev, void *data, int n_bytes)
-+{
-+ int i = 0;
-+ struct yaffs_ext_tags tags;
-+ int chunk;
-+ int offset_chunk;
-+ u8 *data_bytes = (u8 *) data;
-+
-+ if (!dev->checkpt_buffer)
-+ return 0;
-+
-+ if (dev->checkpt_open_write)
-+ return -1;
-+
-+ while (i < n_bytes) {
-+
-+ if (dev->checkpt_byte_offs < 0 ||
-+ dev->checkpt_byte_offs >= dev->data_bytes_per_chunk) {
-+
-+ if (dev->checkpt_cur_block < 0) {
-+ yaffs2_checkpt_find_block(dev);
-+ dev->checkpt_cur_chunk = 0;
-+ }
-+
-+ /* Bail out if we can't find a checpoint block */
-+ if (dev->checkpt_cur_block < 0)
-+ break;
-+
-+ chunk = dev->checkpt_cur_block *
-+ dev->param.chunks_per_block +
-+ dev->checkpt_cur_chunk;
-+
-+ offset_chunk = apply_chunk_offset(dev, chunk);
-+ dev->n_page_reads++;
-+
-+ /* Read in the next chunk */
-+ dev->tagger.read_chunk_tags_fn(dev,
-+ offset_chunk,
-+ dev->checkpt_buffer,
-+ &tags);
-+
-+ /* Bail out if the chunk is corrupted. */
-+ if (tags.chunk_id != (dev->checkpt_page_seq + 1) ||
-+ tags.ecc_result > YAFFS_ECC_RESULT_FIXED ||
-+ tags.seq_number != YAFFS_SEQUENCE_CHECKPOINT_DATA)
-+ break;
-+
-+ /* Bail out if it is not a checkpoint chunk. */
-+ if(!yaffs2_checkpt_check_chunk_hdr(dev))
-+ break;
-+
-+ dev->checkpt_page_seq++;
-+ dev->checkpt_cur_chunk++;
-+
-+ if (dev->checkpt_cur_chunk >=
-+ dev->param.chunks_per_block)
-+ dev->checkpt_cur_block = -1;
-+
-+ }
-+
-+ *data_bytes = dev->checkpt_buffer[dev->checkpt_byte_offs];
-+ dev->checkpt_sum += *data_bytes;
-+ dev->checkpt_xor ^= *data_bytes;
-+ dev->checkpt_byte_offs++;
-+ i++;
-+ data_bytes++;
-+ dev->checkpt_byte_count++;
-+ }
-+
-+ return i; /* Number of bytes read */
-+}
-+
-+int yaffs_checkpt_close(struct yaffs_dev *dev)
-+{
-+ int i;
-+
-+ if (dev->checkpt_open_write) {
-+ if (dev->checkpt_byte_offs !=
-+ sizeof(sizeof(struct yaffs_checkpt_chunk_hdr)))
-+ yaffs2_checkpt_flush_buffer(dev);
-+ } else if (dev->checkpt_block_list) {
-+ for (i = 0;
-+ i < dev->blocks_in_checkpt &&
-+ dev->checkpt_block_list[i] >= 0; i++) {
-+ int blk = dev->checkpt_block_list[i];
-+ struct yaffs_block_info *bi = NULL;
-+
-+ if (dev->internal_start_block <= blk &&
-+ blk <= dev->internal_end_block)
-+ bi = yaffs_get_block_info(dev, blk);
-+ if (bi && bi->block_state == YAFFS_BLOCK_STATE_EMPTY)
-+ bi->block_state = YAFFS_BLOCK_STATE_CHECKPOINT;
-+ }
-+ }
-+
-+ dev->n_free_chunks -=
-+ dev->blocks_in_checkpt * dev->param.chunks_per_block;
-+ dev->n_erased_blocks -= dev->blocks_in_checkpt;
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT, "checkpoint byte count %d",
-+ dev->checkpt_byte_count);
-+
-+ if (dev->checkpt_buffer)
-+ return 1;
-+ else
-+ return 0;
-+}
-+
-+int yaffs2_checkpt_invalidate_stream(struct yaffs_dev *dev)
-+{
-+ /* Erase the checkpoint data */
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "checkpoint invalidate of %d blocks",
-+ dev->blocks_in_checkpt);
-+
-+ return yaffs_checkpt_erase(dev);
-+}
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_checkptrw.h linux-3.18.14/fs/yaffs2/yaffs_checkptrw.h
---- linux-3.18.14.orig/fs/yaffs2/yaffs_checkptrw.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_checkptrw.h 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,33 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_CHECKPTRW_H__
-+#define __YAFFS_CHECKPTRW_H__
-+
-+#include "yaffs_guts.h"
-+
-+int yaffs2_checkpt_open(struct yaffs_dev *dev, int writing);
-+
-+int yaffs2_checkpt_wr(struct yaffs_dev *dev, const void *data, int n_bytes);
-+
-+int yaffs2_checkpt_rd(struct yaffs_dev *dev, void *data, int n_bytes);
-+
-+int yaffs2_get_checkpt_sum(struct yaffs_dev *dev, u32 * sum);
-+
-+int yaffs_checkpt_close(struct yaffs_dev *dev);
-+
-+int yaffs2_checkpt_invalidate_stream(struct yaffs_dev *dev);
-+
-+#endif
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_ecc.c linux-3.18.14/fs/yaffs2/yaffs_ecc.c
---- linux-3.18.14.orig/fs/yaffs2/yaffs_ecc.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_ecc.c 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,281 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+/*
-+ * This code implements the ECC algorithm used in SmartMedia.
-+ *
-+ * The ECC comprises 22 bits of parity information and is stuffed into 3 bytes.
-+ * The two unused bit are set to 1.
-+ * The ECC can correct single bit errors in a 256-byte page of data. Thus, two
-+ * such ECC blocks are used on a 512-byte NAND page.
-+ *
-+ */
-+
-+#include "yportenv.h"
-+
-+#include "yaffs_ecc.h"
-+
-+/* Table generated by gen-ecc.c
-+ * Using a table means we do not have to calculate p1..p4 and p1'..p4'
-+ * for each byte of data. These are instead provided in a table in bits7..2.
-+ * Bit 0 of each entry indicates whether the entry has an odd or even parity,
-+ * and therefore this bytes influence on the line parity.
-+ */
-+
-+static const unsigned char column_parity_table[] = {
-+ 0x00, 0x55, 0x59, 0x0c, 0x65, 0x30, 0x3c, 0x69,
-+ 0x69, 0x3c, 0x30, 0x65, 0x0c, 0x59, 0x55, 0x00,
-+ 0x95, 0xc0, 0xcc, 0x99, 0xf0, 0xa5, 0xa9, 0xfc,
-+ 0xfc, 0xa9, 0xa5, 0xf0, 0x99, 0xcc, 0xc0, 0x95,
-+ 0x99, 0xcc, 0xc0, 0x95, 0xfc, 0xa9, 0xa5, 0xf0,
-+ 0xf0, 0xa5, 0xa9, 0xfc, 0x95, 0xc0, 0xcc, 0x99,
-+ 0x0c, 0x59, 0x55, 0x00, 0x69, 0x3c, 0x30, 0x65,
-+ 0x65, 0x30, 0x3c, 0x69, 0x00, 0x55, 0x59, 0x0c,
-+ 0xa5, 0xf0, 0xfc, 0xa9, 0xc0, 0x95, 0x99, 0xcc,
-+ 0xcc, 0x99, 0x95, 0xc0, 0xa9, 0xfc, 0xf0, 0xa5,
-+ 0x30, 0x65, 0x69, 0x3c, 0x55, 0x00, 0x0c, 0x59,
-+ 0x59, 0x0c, 0x00, 0x55, 0x3c, 0x69, 0x65, 0x30,
-+ 0x3c, 0x69, 0x65, 0x30, 0x59, 0x0c, 0x00, 0x55,
-+ 0x55, 0x00, 0x0c, 0x59, 0x30, 0x65, 0x69, 0x3c,
-+ 0xa9, 0xfc, 0xf0, 0xa5, 0xcc, 0x99, 0x95, 0xc0,
-+ 0xc0, 0x95, 0x99, 0xcc, 0xa5, 0xf0, 0xfc, 0xa9,
-+ 0xa9, 0xfc, 0xf0, 0xa5, 0xcc, 0x99, 0x95, 0xc0,
-+ 0xc0, 0x95, 0x99, 0xcc, 0xa5, 0xf0, 0xfc, 0xa9,
-+ 0x3c, 0x69, 0x65, 0x30, 0x59, 0x0c, 0x00, 0x55,
-+ 0x55, 0x00, 0x0c, 0x59, 0x30, 0x65, 0x69, 0x3c,
-+ 0x30, 0x65, 0x69, 0x3c, 0x55, 0x00, 0x0c, 0x59,
-+ 0x59, 0x0c, 0x00, 0x55, 0x3c, 0x69, 0x65, 0x30,
-+ 0xa5, 0xf0, 0xfc, 0xa9, 0xc0, 0x95, 0x99, 0xcc,
-+ 0xcc, 0x99, 0x95, 0xc0, 0xa9, 0xfc, 0xf0, 0xa5,
-+ 0x0c, 0x59, 0x55, 0x00, 0x69, 0x3c, 0x30, 0x65,
-+ 0x65, 0x30, 0x3c, 0x69, 0x00, 0x55, 0x59, 0x0c,
-+ 0x99, 0xcc, 0xc0, 0x95, 0xfc, 0xa9, 0xa5, 0xf0,
-+ 0xf0, 0xa5, 0xa9, 0xfc, 0x95, 0xc0, 0xcc, 0x99,
-+ 0x95, 0xc0, 0xcc, 0x99, 0xf0, 0xa5, 0xa9, 0xfc,
-+ 0xfc, 0xa9, 0xa5, 0xf0, 0x99, 0xcc, 0xc0, 0x95,
-+ 0x00, 0x55, 0x59, 0x0c, 0x65, 0x30, 0x3c, 0x69,
-+ 0x69, 0x3c, 0x30, 0x65, 0x0c, 0x59, 0x55, 0x00,
-+};
-+
-+
-+/* Calculate the ECC for a 256-byte block of data */
-+void yaffs_ecc_calc(const unsigned char *data, unsigned char *ecc)
-+{
-+ unsigned int i;
-+ unsigned char col_parity = 0;
-+ unsigned char line_parity = 0;
-+ unsigned char line_parity_prime = 0;
-+ unsigned char t;
-+ unsigned char b;
-+
-+ for (i = 0; i < 256; i++) {
-+ b = column_parity_table[*data++];
-+ col_parity ^= b;
-+
-+ if (b & 0x01) { /* odd number of bits in the byte */
-+ line_parity ^= i;
-+ line_parity_prime ^= ~i;
-+ }
-+ }
-+
-+ ecc[2] = (~col_parity) | 0x03;
-+
-+ t = 0;
-+ if (line_parity & 0x80)
-+ t |= 0x80;
-+ if (line_parity_prime & 0x80)
-+ t |= 0x40;
-+ if (line_parity & 0x40)
-+ t |= 0x20;
-+ if (line_parity_prime & 0x40)
-+ t |= 0x10;
-+ if (line_parity & 0x20)
-+ t |= 0x08;
-+ if (line_parity_prime & 0x20)
-+ t |= 0x04;
-+ if (line_parity & 0x10)
-+ t |= 0x02;
-+ if (line_parity_prime & 0x10)
-+ t |= 0x01;
-+ ecc[1] = ~t;
-+
-+ t = 0;
-+ if (line_parity & 0x08)
-+ t |= 0x80;
-+ if (line_parity_prime & 0x08)
-+ t |= 0x40;
-+ if (line_parity & 0x04)
-+ t |= 0x20;
-+ if (line_parity_prime & 0x04)
-+ t |= 0x10;
-+ if (line_parity & 0x02)
-+ t |= 0x08;
-+ if (line_parity_prime & 0x02)
-+ t |= 0x04;
-+ if (line_parity & 0x01)
-+ t |= 0x02;
-+ if (line_parity_prime & 0x01)
-+ t |= 0x01;
-+ ecc[0] = ~t;
-+
-+}
-+
-+/* Correct the ECC on a 256 byte block of data */
-+
-+int yaffs_ecc_correct(unsigned char *data, unsigned char *read_ecc,
-+ const unsigned char *test_ecc)
-+{
-+ unsigned char d0, d1, d2; /* deltas */
-+
-+ d0 = read_ecc[0] ^ test_ecc[0];
-+ d1 = read_ecc[1] ^ test_ecc[1];
-+ d2 = read_ecc[2] ^ test_ecc[2];
-+
-+ if ((d0 | d1 | d2) == 0)
-+ return 0; /* no error */
-+
-+ if (((d0 ^ (d0 >> 1)) & 0x55) == 0x55 &&
-+ ((d1 ^ (d1 >> 1)) & 0x55) == 0x55 &&
-+ ((d2 ^ (d2 >> 1)) & 0x54) == 0x54) {
-+ /* Single bit (recoverable) error in data */
-+
-+ unsigned byte;
-+ unsigned bit;
-+
-+ bit = byte = 0;
-+
-+ if (d1 & 0x80)
-+ byte |= 0x80;
-+ if (d1 & 0x20)
-+ byte |= 0x40;
-+ if (d1 & 0x08)
-+ byte |= 0x20;
-+ if (d1 & 0x02)
-+ byte |= 0x10;
-+ if (d0 & 0x80)
-+ byte |= 0x08;
-+ if (d0 & 0x20)
-+ byte |= 0x04;
-+ if (d0 & 0x08)
-+ byte |= 0x02;
-+ if (d0 & 0x02)
-+ byte |= 0x01;
-+
-+ if (d2 & 0x80)
-+ bit |= 0x04;
-+ if (d2 & 0x20)
-+ bit |= 0x02;
-+ if (d2 & 0x08)
-+ bit |= 0x01;
-+
-+ data[byte] ^= (1 << bit);
-+
-+ return 1; /* Corrected the error */
-+ }
-+
-+ if ((hweight8(d0) + hweight8(d1) + hweight8(d2)) == 1) {
-+ /* Reccoverable error in ecc */
-+
-+ read_ecc[0] = test_ecc[0];
-+ read_ecc[1] = test_ecc[1];
-+ read_ecc[2] = test_ecc[2];
-+
-+ return 1; /* Corrected the error */
-+ }
-+
-+ /* Unrecoverable error */
-+
-+ return -1;
-+
-+}
-+
-+/*
-+ * ECCxxxOther does ECC calcs on arbitrary n bytes of data
-+ */
-+void yaffs_ecc_calc_other(const unsigned char *data, unsigned n_bytes,
-+ struct yaffs_ecc_other *ecc_other)
-+{
-+ unsigned int i;
-+ unsigned char col_parity = 0;
-+ unsigned line_parity = 0;
-+ unsigned line_parity_prime = 0;
-+ unsigned char b;
-+
-+ for (i = 0; i < n_bytes; i++) {
-+ b = column_parity_table[*data++];
-+ col_parity ^= b;
-+
-+ if (b & 0x01) {
-+ /* odd number of bits in the byte */
-+ line_parity ^= i;
-+ line_parity_prime ^= ~i;
-+ }
-+
-+ }
-+
-+ ecc_other->col_parity = (col_parity >> 2) & 0x3f;
-+ ecc_other->line_parity = line_parity;
-+ ecc_other->line_parity_prime = line_parity_prime;
-+}
-+
-+int yaffs_ecc_correct_other(unsigned char *data, unsigned n_bytes,
-+ struct yaffs_ecc_other *read_ecc,
-+ const struct yaffs_ecc_other *test_ecc)
-+{
-+ unsigned char delta_col; /* column parity delta */
-+ unsigned delta_line; /* line parity delta */
-+ unsigned delta_line_prime; /* line parity delta */
-+ unsigned bit;
-+
-+ delta_col = read_ecc->col_parity ^ test_ecc->col_parity;
-+ delta_line = read_ecc->line_parity ^ test_ecc->line_parity;
-+ delta_line_prime =
-+ read_ecc->line_parity_prime ^ test_ecc->line_parity_prime;
-+
-+ if ((delta_col | delta_line | delta_line_prime) == 0)
-+ return 0; /* no error */
-+
-+ if (delta_line == ~delta_line_prime &&
-+ (((delta_col ^ (delta_col >> 1)) & 0x15) == 0x15)) {
-+ /* Single bit (recoverable) error in data */
-+
-+ bit = 0;
-+
-+ if (delta_col & 0x20)
-+ bit |= 0x04;
-+ if (delta_col & 0x08)
-+ bit |= 0x02;
-+ if (delta_col & 0x02)
-+ bit |= 0x01;
-+
-+ if (delta_line >= n_bytes)
-+ return -1;
-+
-+ data[delta_line] ^= (1 << bit);
-+
-+ return 1; /* corrected */
-+ }
-+
-+ if ((hweight32(delta_line) +
-+ hweight32(delta_line_prime) +
-+ hweight8(delta_col)) == 1) {
-+ /* Reccoverable error in ecc */
-+
-+ *read_ecc = *test_ecc;
-+ return 1; /* corrected */
-+ }
-+
-+ /* Unrecoverable error */
-+
-+ return -1;
-+}
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_ecc.h linux-3.18.14/fs/yaffs2/yaffs_ecc.h
---- linux-3.18.14.orig/fs/yaffs2/yaffs_ecc.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_ecc.h 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,44 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+/*
-+ * This code implements the ECC algorithm used in SmartMedia.
-+ *
-+ * The ECC comprises 22 bits of parity information and is stuffed into 3 bytes.
-+ * The two unused bit are set to 1.
-+ * The ECC can correct single bit errors in a 256-byte page of data.
-+ * Thus, two such ECC blocks are used on a 512-byte NAND page.
-+ *
-+ */
-+
-+#ifndef __YAFFS_ECC_H__
-+#define __YAFFS_ECC_H__
-+
-+struct yaffs_ecc_other {
-+ unsigned char col_parity;
-+ unsigned line_parity;
-+ unsigned line_parity_prime;
-+};
-+
-+void yaffs_ecc_calc(const unsigned char *data, unsigned char *ecc);
-+int yaffs_ecc_correct(unsigned char *data, unsigned char *read_ecc,
-+ const unsigned char *test_ecc);
-+
-+void yaffs_ecc_calc_other(const unsigned char *data, unsigned n_bytes,
-+ struct yaffs_ecc_other *ecc);
-+int yaffs_ecc_correct_other(unsigned char *data, unsigned n_bytes,
-+ struct yaffs_ecc_other *read_ecc,
-+ const struct yaffs_ecc_other *test_ecc);
-+#endif
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_getblockinfo.h linux-3.18.14/fs/yaffs2/yaffs_getblockinfo.h
---- linux-3.18.14.orig/fs/yaffs2/yaffs_getblockinfo.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_getblockinfo.h 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,35 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_GETBLOCKINFO_H__
-+#define __YAFFS_GETBLOCKINFO_H__
-+
-+#include "yaffs_guts.h"
-+#include "yaffs_trace.h"
-+
-+/* Function to manipulate block info */
-+static inline struct yaffs_block_info *yaffs_get_block_info(struct yaffs_dev
-+ *dev, int blk)
-+{
-+ if (blk < dev->internal_start_block || blk > dev->internal_end_block) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "**>> yaffs: get_block_info block %d is not valid",
-+ blk);
-+ BUG();
-+ }
-+ return &dev->block_info[blk - dev->internal_start_block];
-+}
-+
-+#endif
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_guts.c linux-3.18.14/fs/yaffs2/yaffs_guts.c
---- linux-3.18.14.orig/fs/yaffs2/yaffs_guts.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_guts.c 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,5140 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yportenv.h"
-+#include "yaffs_trace.h"
-+
-+#include "yaffs_guts.h"
-+#include "yaffs_getblockinfo.h"
-+#include "yaffs_tagscompat.h"
-+#include "yaffs_tagsmarshall.h"
-+#include "yaffs_nand.h"
-+#include "yaffs_yaffs1.h"
-+#include "yaffs_yaffs2.h"
-+#include "yaffs_bitmap.h"
-+#include "yaffs_verify.h"
-+#include "yaffs_nand.h"
-+#include "yaffs_packedtags2.h"
-+#include "yaffs_nameval.h"
-+#include "yaffs_allocator.h"
-+#include "yaffs_attribs.h"
-+#include "yaffs_summary.h"
-+
-+/* Note YAFFS_GC_GOOD_ENOUGH must be <= YAFFS_GC_PASSIVE_THRESHOLD */
-+#define YAFFS_GC_GOOD_ENOUGH 2
-+#define YAFFS_GC_PASSIVE_THRESHOLD 4
-+
-+#include "yaffs_ecc.h"
-+
-+/* Forward declarations */
-+
-+static int yaffs_wr_data_obj(struct yaffs_obj *in, int inode_chunk,
-+ const u8 *buffer, int n_bytes, int use_reserve);
-+
-+static void yaffs_fix_null_name(struct yaffs_obj *obj, YCHAR *name,
-+ int buffer_size);
-+
-+/* Function to calculate chunk and offset */
-+
-+void yaffs_addr_to_chunk(struct yaffs_dev *dev, loff_t addr,
-+ int *chunk_out, u32 *offset_out)
-+{
-+ int chunk;
-+ u32 offset;
-+
-+ chunk = (u32) (addr >> dev->chunk_shift);
-+
-+ if (dev->chunk_div == 1) {
-+ /* easy power of 2 case */
-+ offset = (u32) (addr & dev->chunk_mask);
-+ } else {
-+ /* Non power-of-2 case */
-+
-+ loff_t chunk_base;
-+
-+ chunk /= dev->chunk_div;
-+
-+ chunk_base = ((loff_t) chunk) * dev->data_bytes_per_chunk;
-+ offset = (u32) (addr - chunk_base);
-+ }
-+
-+ *chunk_out = chunk;
-+ *offset_out = offset;
-+}
-+
-+/* Function to return the number of shifts for a power of 2 greater than or
-+ * equal to the given number
-+ * Note we don't try to cater for all possible numbers and this does not have to
-+ * be hellishly efficient.
-+ */
-+
-+static inline u32 calc_shifts_ceiling(u32 x)
-+{
-+ int extra_bits;
-+ int shifts;
-+
-+ shifts = extra_bits = 0;
-+
-+ while (x > 1) {
-+ if (x & 1)
-+ extra_bits++;
-+ x >>= 1;
-+ shifts++;
-+ }
-+
-+ if (extra_bits)
-+ shifts++;
-+
-+ return shifts;
-+}
-+
-+/* Function to return the number of shifts to get a 1 in bit 0
-+ */
-+
-+static inline u32 calc_shifts(u32 x)
-+{
-+ u32 shifts;
-+
-+ shifts = 0;
-+
-+ if (!x)
-+ return 0;
-+
-+ while (!(x & 1)) {
-+ x >>= 1;
-+ shifts++;
-+ }
-+
-+ return shifts;
-+}
-+
-+/*
-+ * Temporary buffer manipulations.
-+ */
-+
-+static int yaffs_init_tmp_buffers(struct yaffs_dev *dev)
-+{
-+ int i;
-+ u8 *buf = (u8 *) 1;
-+
-+ memset(dev->temp_buffer, 0, sizeof(dev->temp_buffer));
-+
-+ for (i = 0; buf && i < YAFFS_N_TEMP_BUFFERS; i++) {
-+ dev->temp_buffer[i].in_use = 0;
-+ buf = kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS);
-+ dev->temp_buffer[i].buffer = buf;
-+ }
-+
-+ return buf ? YAFFS_OK : YAFFS_FAIL;
-+}
-+
-+u8 *yaffs_get_temp_buffer(struct yaffs_dev * dev)
-+{
-+ int i;
-+
-+ dev->temp_in_use++;
-+ if (dev->temp_in_use > dev->max_temp)
-+ dev->max_temp = dev->temp_in_use;
-+
-+ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
-+ if (dev->temp_buffer[i].in_use == 0) {
-+ dev->temp_buffer[i].in_use = 1;
-+ return dev->temp_buffer[i].buffer;
-+ }
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_BUFFERS, "Out of temp buffers");
-+ /*
-+ * If we got here then we have to allocate an unmanaged one
-+ * This is not good.
-+ */
-+
-+ dev->unmanaged_buffer_allocs++;
-+ return kmalloc(dev->data_bytes_per_chunk, GFP_NOFS);
-+
-+}
-+
-+void yaffs_release_temp_buffer(struct yaffs_dev *dev, u8 *buffer)
-+{
-+ int i;
-+
-+ dev->temp_in_use--;
-+
-+ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
-+ if (dev->temp_buffer[i].buffer == buffer) {
-+ dev->temp_buffer[i].in_use = 0;
-+ return;
-+ }
-+ }
-+
-+ if (buffer) {
-+ /* assume it is an unmanaged one. */
-+ yaffs_trace(YAFFS_TRACE_BUFFERS,
-+ "Releasing unmanaged temp buffer");
-+ kfree(buffer);
-+ dev->unmanaged_buffer_deallocs++;
-+ }
-+
-+}
-+
-+/*
-+ * Functions for robustisizing TODO
-+ *
-+ */
-+
-+static void yaffs_handle_chunk_wr_ok(struct yaffs_dev *dev, int nand_chunk,
-+ const u8 *data,
-+ const struct yaffs_ext_tags *tags)
-+{
-+ (void) dev;
-+ (void) nand_chunk;
-+ (void) data;
-+ (void) tags;
-+}
-+
-+static void yaffs_handle_chunk_update(struct yaffs_dev *dev, int nand_chunk,
-+ const struct yaffs_ext_tags *tags)
-+{
-+ (void) dev;
-+ (void) nand_chunk;
-+ (void) tags;
-+}
-+
-+void yaffs_handle_chunk_error(struct yaffs_dev *dev,
-+ struct yaffs_block_info *bi)
-+{
-+ if (!bi->gc_prioritise) {
-+ bi->gc_prioritise = 1;
-+ dev->has_pending_prioritised_gc = 1;
-+ bi->chunk_error_strikes++;
-+
-+ if (bi->chunk_error_strikes > 3) {
-+ bi->needs_retiring = 1; /* Too many stikes, so retire */
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs: Block struck out");
-+
-+ }
-+ }
-+}
-+
-+static void yaffs_handle_chunk_wr_error(struct yaffs_dev *dev, int nand_chunk,
-+ int erased_ok)
-+{
-+ int flash_block = nand_chunk / dev->param.chunks_per_block;
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, flash_block);
-+
-+ yaffs_handle_chunk_error(dev, bi);
-+
-+ if (erased_ok) {
-+ /* Was an actual write failure,
-+ * so mark the block for retirement.*/
-+ bi->needs_retiring = 1;
-+ yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
-+ "**>> Block %d needs retiring", flash_block);
-+ }
-+
-+ /* Delete the chunk */
-+ yaffs_chunk_del(dev, nand_chunk, 1, __LINE__);
-+ yaffs_skip_rest_of_block(dev);
-+}
-+
-+/*
-+ * Verification code
-+ */
-+
-+/*
-+ * Simple hash function. Needs to have a reasonable spread
-+ */
-+
-+static inline int yaffs_hash_fn(int n)
-+{
-+ if (n < 0)
-+ n = -n;
-+ return n % YAFFS_NOBJECT_BUCKETS;
-+}
-+
-+/*
-+ * Access functions to useful fake objects.
-+ * Note that root might have a presence in NAND if permissions are set.
-+ */
-+
-+struct yaffs_obj *yaffs_root(struct yaffs_dev *dev)
-+{
-+ return dev->root_dir;
-+}
-+
-+struct yaffs_obj *yaffs_lost_n_found(struct yaffs_dev *dev)
-+{
-+ return dev->lost_n_found;
-+}
-+
-+/*
-+ * Erased NAND checking functions
-+ */
-+
-+int yaffs_check_ff(u8 *buffer, int n_bytes)
-+{
-+ /* Horrible, slow implementation */
-+ while (n_bytes--) {
-+ if (*buffer != 0xff)
-+ return 0;
-+ buffer++;
-+ }
-+ return 1;
-+}
-+
-+static int yaffs_check_chunk_erased(struct yaffs_dev *dev, int nand_chunk)
-+{
-+ int retval = YAFFS_OK;
-+ u8 *data = yaffs_get_temp_buffer(dev);
-+ struct yaffs_ext_tags tags;
-+ int result;
-+
-+ result = yaffs_rd_chunk_tags_nand(dev, nand_chunk, data, &tags);
-+
-+ if (tags.ecc_result > YAFFS_ECC_RESULT_NO_ERROR)
-+ retval = YAFFS_FAIL;
-+
-+ if (!yaffs_check_ff(data, dev->data_bytes_per_chunk) ||
-+ tags.chunk_used) {
-+ yaffs_trace(YAFFS_TRACE_NANDACCESS,
-+ "Chunk %d not erased", nand_chunk);
-+ retval = YAFFS_FAIL;
-+ }
-+
-+ yaffs_release_temp_buffer(dev, data);
-+
-+ return retval;
-+
-+}
-+
-+static int yaffs_verify_chunk_written(struct yaffs_dev *dev,
-+ int nand_chunk,
-+ const u8 *data,
-+ struct yaffs_ext_tags *tags)
-+{
-+ int retval = YAFFS_OK;
-+ struct yaffs_ext_tags temp_tags;
-+ u8 *buffer = yaffs_get_temp_buffer(dev);
-+ int result;
-+
-+ result = yaffs_rd_chunk_tags_nand(dev, nand_chunk, buffer, &temp_tags);
-+ if (memcmp(buffer, data, dev->data_bytes_per_chunk) ||
-+ temp_tags.obj_id != tags->obj_id ||
-+ temp_tags.chunk_id != tags->chunk_id ||
-+ temp_tags.n_bytes != tags->n_bytes)
-+ retval = YAFFS_FAIL;
-+
-+ yaffs_release_temp_buffer(dev, buffer);
-+
-+ return retval;
-+}
-+
-+
-+int yaffs_check_alloc_available(struct yaffs_dev *dev, int n_chunks)
-+{
-+ int reserved_chunks;
-+ int reserved_blocks = dev->param.n_reserved_blocks;
-+ int checkpt_blocks;
-+
-+ checkpt_blocks = yaffs_calc_checkpt_blocks_required(dev);
-+
-+ reserved_chunks =
-+ (reserved_blocks + checkpt_blocks) * dev->param.chunks_per_block;
-+
-+ return (dev->n_free_chunks > (reserved_chunks + n_chunks));
-+}
-+
-+static int yaffs_find_alloc_block(struct yaffs_dev *dev)
-+{
-+ int i;
-+ struct yaffs_block_info *bi;
-+
-+ if (dev->n_erased_blocks < 1) {
-+ /* Hoosterman we've got a problem.
-+ * Can't get space to gc
-+ */
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs tragedy: no more erased blocks");
-+
-+ return -1;
-+ }
-+
-+ /* Find an empty block. */
-+
-+ for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
-+ dev->alloc_block_finder++;
-+ if (dev->alloc_block_finder < dev->internal_start_block
-+ || dev->alloc_block_finder > dev->internal_end_block) {
-+ dev->alloc_block_finder = dev->internal_start_block;
-+ }
-+
-+ bi = yaffs_get_block_info(dev, dev->alloc_block_finder);
-+
-+ if (bi->block_state == YAFFS_BLOCK_STATE_EMPTY) {
-+ bi->block_state = YAFFS_BLOCK_STATE_ALLOCATING;
-+ dev->seq_number++;
-+ bi->seq_number = dev->seq_number;
-+ dev->n_erased_blocks--;
-+ yaffs_trace(YAFFS_TRACE_ALLOCATE,
-+ "Allocated block %d, seq %d, %d left" ,
-+ dev->alloc_block_finder, dev->seq_number,
-+ dev->n_erased_blocks);
-+ return dev->alloc_block_finder;
-+ }
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs tragedy: no more erased blocks, but there should have been %d",
-+ dev->n_erased_blocks);
-+
-+ return -1;
-+}
-+
-+static int yaffs_alloc_chunk(struct yaffs_dev *dev, int use_reserver,
-+ struct yaffs_block_info **block_ptr)
-+{
-+ int ret_val;
-+ struct yaffs_block_info *bi;
-+
-+ if (dev->alloc_block < 0) {
-+ /* Get next block to allocate off */
-+ dev->alloc_block = yaffs_find_alloc_block(dev);
-+ dev->alloc_page = 0;
-+ }
-+
-+ if (!use_reserver && !yaffs_check_alloc_available(dev, 1)) {
-+ /* No space unless we're allowed to use the reserve. */
-+ return -1;
-+ }
-+
-+ if (dev->n_erased_blocks < dev->param.n_reserved_blocks
-+ && dev->alloc_page == 0)
-+ yaffs_trace(YAFFS_TRACE_ALLOCATE, "Allocating reserve");
-+
-+ /* Next page please.... */
-+ if (dev->alloc_block >= 0) {
-+ bi = yaffs_get_block_info(dev, dev->alloc_block);
-+
-+ ret_val = (dev->alloc_block * dev->param.chunks_per_block) +
-+ dev->alloc_page;
-+ bi->pages_in_use++;
-+ yaffs_set_chunk_bit(dev, dev->alloc_block, dev->alloc_page);
-+
-+ dev->alloc_page++;
-+
-+ dev->n_free_chunks--;
-+
-+ /* If the block is full set the state to full */
-+ if (dev->alloc_page >= dev->param.chunks_per_block) {
-+ bi->block_state = YAFFS_BLOCK_STATE_FULL;
-+ dev->alloc_block = -1;
-+ }
-+
-+ if (block_ptr)
-+ *block_ptr = bi;
-+
-+ return ret_val;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!");
-+
-+ return -1;
-+}
-+
-+static int yaffs_get_erased_chunks(struct yaffs_dev *dev)
-+{
-+ int n;
-+
-+ n = dev->n_erased_blocks * dev->param.chunks_per_block;
-+
-+ if (dev->alloc_block > 0)
-+ n += (dev->param.chunks_per_block - dev->alloc_page);
-+
-+ return n;
-+
-+}
-+
-+/*
-+ * yaffs_skip_rest_of_block() skips over the rest of the allocation block
-+ * if we don't want to write to it.
-+ */
-+void yaffs_skip_rest_of_block(struct yaffs_dev *dev)
-+{
-+ struct yaffs_block_info *bi;
-+
-+ if (dev->alloc_block > 0) {
-+ bi = yaffs_get_block_info(dev, dev->alloc_block);
-+ if (bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING) {
-+ bi->block_state = YAFFS_BLOCK_STATE_FULL;
-+ dev->alloc_block = -1;
-+ }
-+ }
-+}
-+
-+static int yaffs_write_new_chunk(struct yaffs_dev *dev,
-+ const u8 *data,
-+ struct yaffs_ext_tags *tags, int use_reserver)
-+{
-+ int attempts = 0;
-+ int write_ok = 0;
-+ int chunk;
-+
-+ yaffs2_checkpt_invalidate(dev);
-+
-+ do {
-+ struct yaffs_block_info *bi = 0;
-+ int erased_ok = 0;
-+
-+ chunk = yaffs_alloc_chunk(dev, use_reserver, &bi);
-+ if (chunk < 0) {
-+ /* no space */
-+ break;
-+ }
-+
-+ /* First check this chunk is erased, if it needs
-+ * checking. The checking policy (unless forced
-+ * always on) is as follows:
-+ *
-+ * Check the first page we try to write in a block.
-+ * If the check passes then we don't need to check any
-+ * more. If the check fails, we check again...
-+ * If the block has been erased, we don't need to check.
-+ *
-+ * However, if the block has been prioritised for gc,
-+ * then we think there might be something odd about
-+ * this block and stop using it.
-+ *
-+ * Rationale: We should only ever see chunks that have
-+ * not been erased if there was a partially written
-+ * chunk due to power loss. This checking policy should
-+ * catch that case with very few checks and thus save a
-+ * lot of checks that are most likely not needed.
-+ *
-+ * Mods to the above
-+ * If an erase check fails or the write fails we skip the
-+ * rest of the block.
-+ */
-+
-+ /* let's give it a try */
-+ attempts++;
-+
-+ if (dev->param.always_check_erased)
-+ bi->skip_erased_check = 0;
-+
-+ if (!bi->skip_erased_check) {
-+ erased_ok = yaffs_check_chunk_erased(dev, chunk);
-+ if (erased_ok != YAFFS_OK) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "**>> yaffs chunk %d was not erased",
-+ chunk);
-+
-+ /* If not erased, delete this one,
-+ * skip rest of block and
-+ * try another chunk */
-+ yaffs_chunk_del(dev, chunk, 1, __LINE__);
-+ yaffs_skip_rest_of_block(dev);
-+ continue;
-+ }
-+ }
-+
-+ write_ok = yaffs_wr_chunk_tags_nand(dev, chunk, data, tags);
-+
-+ if (!bi->skip_erased_check)
-+ write_ok =
-+ yaffs_verify_chunk_written(dev, chunk, data, tags);
-+
-+ if (write_ok != YAFFS_OK) {
-+ /* Clean up aborted write, skip to next block and
-+ * try another chunk */
-+ yaffs_handle_chunk_wr_error(dev, chunk, erased_ok);
-+ continue;
-+ }
-+
-+ bi->skip_erased_check = 1;
-+
-+ /* Copy the data into the robustification buffer */
-+ yaffs_handle_chunk_wr_ok(dev, chunk, data, tags);
-+
-+ } while (write_ok != YAFFS_OK &&
-+ (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts));
-+
-+ if (!write_ok)
-+ chunk = -1;
-+
-+ if (attempts > 1) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "**>> yaffs write required %d attempts",
-+ attempts);
-+ dev->n_retried_writes += (attempts - 1);
-+ }
-+
-+ return chunk;
-+}
-+
-+/*
-+ * Block retiring for handling a broken block.
-+ */
-+
-+static void yaffs_retire_block(struct yaffs_dev *dev, int flash_block)
-+{
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, flash_block);
-+
-+ yaffs2_checkpt_invalidate(dev);
-+
-+ yaffs2_clear_oldest_dirty_seq(dev, bi);
-+
-+ if (yaffs_mark_bad(dev, flash_block) != YAFFS_OK) {
-+ if (yaffs_erase_block(dev, flash_block) != YAFFS_OK) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs: Failed to mark bad and erase block %d",
-+ flash_block);
-+ } else {
-+ struct yaffs_ext_tags tags;
-+ int chunk_id =
-+ flash_block * dev->param.chunks_per_block;
-+
-+ u8 *buffer = yaffs_get_temp_buffer(dev);
-+
-+ memset(buffer, 0xff, dev->data_bytes_per_chunk);
-+ memset(&tags, 0, sizeof(tags));
-+ tags.seq_number = YAFFS_SEQUENCE_BAD_BLOCK;
-+ if (dev->tagger.write_chunk_tags_fn(dev, chunk_id -
-+ dev->chunk_offset,
-+ buffer,
-+ &tags) != YAFFS_OK)
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs: Failed to write bad block marker to block %d",
-+ flash_block);
-+
-+ yaffs_release_temp_buffer(dev, buffer);
-+ }
-+ }
-+
-+ bi->block_state = YAFFS_BLOCK_STATE_DEAD;
-+ bi->gc_prioritise = 0;
-+ bi->needs_retiring = 0;
-+
-+ dev->n_retired_blocks++;
-+}
-+
-+/*---------------- Name handling functions ------------*/
-+
-+static void yaffs_load_name_from_oh(struct yaffs_dev *dev, YCHAR *name,
-+ const YCHAR *oh_name, int buff_size)
-+{
-+#ifdef CONFIG_YAFFS_AUTO_UNICODE
-+ if (dev->param.auto_unicode) {
-+ if (*oh_name) {
-+ /* It is an ASCII name, do an ASCII to
-+ * unicode conversion */
-+ const char *ascii_oh_name = (const char *)oh_name;
-+ int n = buff_size - 1;
-+ while (n > 0 && *ascii_oh_name) {
-+ *name = *ascii_oh_name;
-+ name++;
-+ ascii_oh_name++;
-+ n--;
-+ }
-+ } else {
-+ strncpy(name, oh_name + 1, buff_size - 1);
-+ }
-+ } else {
-+#else
-+ (void) dev;
-+ {
-+#endif
-+ strncpy(name, oh_name, buff_size - 1);
-+ }
-+}
-+
-+static void yaffs_load_oh_from_name(struct yaffs_dev *dev, YCHAR *oh_name,
-+ const YCHAR *name)
-+{
-+#ifdef CONFIG_YAFFS_AUTO_UNICODE
-+
-+ int is_ascii;
-+ const YCHAR *w;
-+
-+ if (dev->param.auto_unicode) {
-+
-+ is_ascii = 1;
-+ w = name;
-+
-+ /* Figure out if the name will fit in ascii character set */
-+ while (is_ascii && *w) {
-+ if ((*w) & 0xff00)
-+ is_ascii = 0;
-+ w++;
-+ }
-+
-+ if (is_ascii) {
-+ /* It is an ASCII name, so convert unicode to ascii */
-+ char *ascii_oh_name = (char *)oh_name;
-+ int n = YAFFS_MAX_NAME_LENGTH - 1;
-+ while (n > 0 && *name) {
-+ *ascii_oh_name = *name;
-+ name++;
-+ ascii_oh_name++;
-+ n--;
-+ }
-+ } else {
-+ /* Unicode name, so save starting at the second YCHAR */
-+ *oh_name = 0;
-+ strncpy(oh_name + 1, name, YAFFS_MAX_NAME_LENGTH - 2);
-+ }
-+ } else {
-+#else
-+ dev = dev;
-+ {
-+#endif
-+ strncpy(oh_name, name, YAFFS_MAX_NAME_LENGTH - 1);
-+ }
-+}
-+
-+static u16 yaffs_calc_name_sum(const YCHAR *name)
-+{
-+ u16 sum = 0;
-+ u16 i = 1;
-+
-+ if (!name)
-+ return 0;
-+
-+ while ((*name) && i < (YAFFS_MAX_NAME_LENGTH / 2)) {
-+
-+ /* 0x1f mask is case insensitive */
-+ sum += ((*name) & 0x1f) * i;
-+ i++;
-+ name++;
-+ }
-+ return sum;
-+}
-+
-+
-+void yaffs_set_obj_name(struct yaffs_obj *obj, const YCHAR * name)
-+{
-+ memset(obj->short_name, 0, sizeof(obj->short_name));
-+
-+ if (name && !name[0]) {
-+ yaffs_fix_null_name(obj, obj->short_name,
-+ YAFFS_SHORT_NAME_LENGTH);
-+ name = obj->short_name;
-+ } else if (name &&
-+ strnlen(name, YAFFS_SHORT_NAME_LENGTH + 1) <=
-+ YAFFS_SHORT_NAME_LENGTH) {
-+ strcpy(obj->short_name, name);
-+ }
-+
-+ obj->sum = yaffs_calc_name_sum(name);
-+}
-+
-+void yaffs_set_obj_name_from_oh(struct yaffs_obj *obj,
-+ const struct yaffs_obj_hdr *oh)
-+{
-+#ifdef CONFIG_YAFFS_AUTO_UNICODE
-+ YCHAR tmp_name[YAFFS_MAX_NAME_LENGTH + 1];
-+ memset(tmp_name, 0, sizeof(tmp_name));
-+ yaffs_load_name_from_oh(obj->my_dev, tmp_name, oh->name,
-+ YAFFS_MAX_NAME_LENGTH + 1);
-+ yaffs_set_obj_name(obj, tmp_name);
-+#else
-+ yaffs_set_obj_name(obj, oh->name);
-+#endif
-+}
-+
-+loff_t yaffs_max_file_size(struct yaffs_dev *dev)
-+{
-+ if(sizeof(loff_t) < 8)
-+ return YAFFS_MAX_FILE_SIZE_32;
-+ else
-+ return ((loff_t) YAFFS_MAX_CHUNK_ID) * dev->data_bytes_per_chunk;
-+}
-+
-+/*-------------------- TNODES -------------------
-+
-+ * List of spare tnodes
-+ * The list is hooked together using the first pointer
-+ * in the tnode.
-+ */
-+
-+struct yaffs_tnode *yaffs_get_tnode(struct yaffs_dev *dev)
-+{
-+ struct yaffs_tnode *tn = yaffs_alloc_raw_tnode(dev);
-+
-+ if (tn) {
-+ memset(tn, 0, dev->tnode_size);
-+ dev->n_tnodes++;
-+ }
-+
-+ dev->checkpoint_blocks_required = 0; /* force recalculation */
-+
-+ return tn;
-+}
-+
-+/* FreeTnode frees up a tnode and puts it back on the free list */
-+static void yaffs_free_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn)
-+{
-+ yaffs_free_raw_tnode(dev, tn);
-+ dev->n_tnodes--;
-+ dev->checkpoint_blocks_required = 0; /* force recalculation */
-+}
-+
-+static void yaffs_deinit_tnodes_and_objs(struct yaffs_dev *dev)
-+{
-+ yaffs_deinit_raw_tnodes_and_objs(dev);
-+ dev->n_obj = 0;
-+ dev->n_tnodes = 0;
-+}
-+
-+static void yaffs_load_tnode_0(struct yaffs_dev *dev, struct yaffs_tnode *tn,
-+ unsigned pos, unsigned val)
-+{
-+ u32 *map = (u32 *) tn;
-+ u32 bit_in_map;
-+ u32 bit_in_word;
-+ u32 word_in_map;
-+ u32 mask;
-+
-+ pos &= YAFFS_TNODES_LEVEL0_MASK;
-+ val >>= dev->chunk_grp_bits;
-+
-+ bit_in_map = pos * dev->tnode_width;
-+ word_in_map = bit_in_map / 32;
-+ bit_in_word = bit_in_map & (32 - 1);
-+
-+ mask = dev->tnode_mask << bit_in_word;
-+
-+ map[word_in_map] &= ~mask;
-+ map[word_in_map] |= (mask & (val << bit_in_word));
-+
-+ if (dev->tnode_width > (32 - bit_in_word)) {
-+ bit_in_word = (32 - bit_in_word);
-+ word_in_map++;
-+ mask =
-+ dev->tnode_mask >> bit_in_word;
-+ map[word_in_map] &= ~mask;
-+ map[word_in_map] |= (mask & (val >> bit_in_word));
-+ }
-+}
-+
-+u32 yaffs_get_group_base(struct yaffs_dev *dev, struct yaffs_tnode *tn,
-+ unsigned pos)
-+{
-+ u32 *map = (u32 *) tn;
-+ u32 bit_in_map;
-+ u32 bit_in_word;
-+ u32 word_in_map;
-+ u32 val;
-+
-+ pos &= YAFFS_TNODES_LEVEL0_MASK;
-+
-+ bit_in_map = pos * dev->tnode_width;
-+ word_in_map = bit_in_map / 32;
-+ bit_in_word = bit_in_map & (32 - 1);
-+
-+ val = map[word_in_map] >> bit_in_word;
-+
-+ if (dev->tnode_width > (32 - bit_in_word)) {
-+ bit_in_word = (32 - bit_in_word);
-+ word_in_map++;
-+ val |= (map[word_in_map] << bit_in_word);
-+ }
-+
-+ val &= dev->tnode_mask;
-+ val <<= dev->chunk_grp_bits;
-+
-+ return val;
-+}
-+
-+/* ------------------- End of individual tnode manipulation -----------------*/
-+
-+/* ---------Functions to manipulate the look-up tree (made up of tnodes) ------
-+ * The look up tree is represented by the top tnode and the number of top_level
-+ * in the tree. 0 means only the level 0 tnode is in the tree.
-+ */
-+
-+/* FindLevel0Tnode finds the level 0 tnode, if one exists. */
-+struct yaffs_tnode *yaffs_find_tnode_0(struct yaffs_dev *dev,
-+ struct yaffs_file_var *file_struct,
-+ u32 chunk_id)
-+{
-+ struct yaffs_tnode *tn = file_struct->top;
-+ u32 i;
-+ int required_depth;
-+ int level = file_struct->top_level;
-+
-+ (void) dev;
-+
-+ /* Check sane level and chunk Id */
-+ if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL)
-+ return NULL;
-+
-+ if (chunk_id > YAFFS_MAX_CHUNK_ID)
-+ return NULL;
-+
-+ /* First check we're tall enough (ie enough top_level) */
-+
-+ i = chunk_id >> YAFFS_TNODES_LEVEL0_BITS;
-+ required_depth = 0;
-+ while (i) {
-+ i >>= YAFFS_TNODES_INTERNAL_BITS;
-+ required_depth++;
-+ }
-+
-+ if (required_depth > file_struct->top_level)
-+ return NULL; /* Not tall enough, so we can't find it */
-+
-+ /* Traverse down to level 0 */
-+ while (level > 0 && tn) {
-+ tn = tn->internal[(chunk_id >>
-+ (YAFFS_TNODES_LEVEL0_BITS +
-+ (level - 1) *
-+ YAFFS_TNODES_INTERNAL_BITS)) &
-+ YAFFS_TNODES_INTERNAL_MASK];
-+ level--;
-+ }
-+
-+ return tn;
-+}
-+
-+/* add_find_tnode_0 finds the level 0 tnode if it exists,
-+ * otherwise first expands the tree.
-+ * This happens in two steps:
-+ * 1. If the tree isn't tall enough, then make it taller.
-+ * 2. Scan down the tree towards the level 0 tnode adding tnodes if required.
-+ *
-+ * Used when modifying the tree.
-+ *
-+ * If the tn argument is NULL, then a fresh tnode will be added otherwise the
-+ * specified tn will be plugged into the ttree.
-+ */
-+
-+struct yaffs_tnode *yaffs_add_find_tnode_0(struct yaffs_dev *dev,
-+ struct yaffs_file_var *file_struct,
-+ u32 chunk_id,
-+ struct yaffs_tnode *passed_tn)
-+{
-+ int required_depth;
-+ int i;
-+ int l;
-+ struct yaffs_tnode *tn;
-+ u32 x;
-+
-+ /* Check sane level and page Id */
-+ if (file_struct->top_level < 0 ||
-+ file_struct->top_level > YAFFS_TNODES_MAX_LEVEL)
-+ return NULL;
-+
-+ if (chunk_id > YAFFS_MAX_CHUNK_ID)
-+ return NULL;
-+
-+ /* First check we're tall enough (ie enough top_level) */
-+
-+ x = chunk_id >> YAFFS_TNODES_LEVEL0_BITS;
-+ required_depth = 0;
-+ while (x) {
-+ x >>= YAFFS_TNODES_INTERNAL_BITS;
-+ required_depth++;
-+ }
-+
-+ if (required_depth > file_struct->top_level) {
-+ /* Not tall enough, gotta make the tree taller */
-+ for (i = file_struct->top_level; i < required_depth; i++) {
-+
-+ tn = yaffs_get_tnode(dev);
-+
-+ if (tn) {
-+ tn->internal[0] = file_struct->top;
-+ file_struct->top = tn;
-+ file_struct->top_level++;
-+ } else {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs: no more tnodes");
-+ return NULL;
-+ }
-+ }
-+ }
-+
-+ /* Traverse down to level 0, adding anything we need */
-+
-+ l = file_struct->top_level;
-+ tn = file_struct->top;
-+
-+ if (l > 0) {
-+ while (l > 0 && tn) {
-+ x = (chunk_id >>
-+ (YAFFS_TNODES_LEVEL0_BITS +
-+ (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) &
-+ YAFFS_TNODES_INTERNAL_MASK;
-+
-+ if ((l > 1) && !tn->internal[x]) {
-+ /* Add missing non-level-zero tnode */
-+ tn->internal[x] = yaffs_get_tnode(dev);
-+ if (!tn->internal[x])
-+ return NULL;
-+ } else if (l == 1) {
-+ /* Looking from level 1 at level 0 */
-+ if (passed_tn) {
-+ /* If we already have one, release it */
-+ if (tn->internal[x])
-+ yaffs_free_tnode(dev,
-+ tn->internal[x]);
-+ tn->internal[x] = passed_tn;
-+
-+ } else if (!tn->internal[x]) {
-+ /* Don't have one, none passed in */
-+ tn->internal[x] = yaffs_get_tnode(dev);
-+ if (!tn->internal[x])
-+ return NULL;
-+ }
-+ }
-+
-+ tn = tn->internal[x];
-+ l--;
-+ }
-+ } else {
-+ /* top is level 0 */
-+ if (passed_tn) {
-+ memcpy(tn, passed_tn,
-+ (dev->tnode_width * YAFFS_NTNODES_LEVEL0) / 8);
-+ yaffs_free_tnode(dev, passed_tn);
-+ }
-+ }
-+
-+ return tn;
-+}
-+
-+static int yaffs_tags_match(const struct yaffs_ext_tags *tags, int obj_id,
-+ int chunk_obj)
-+{
-+ return (tags->chunk_id == chunk_obj &&
-+ tags->obj_id == obj_id &&
-+ !tags->is_deleted) ? 1 : 0;
-+
-+}
-+
-+static int yaffs_find_chunk_in_group(struct yaffs_dev *dev, int the_chunk,
-+ struct yaffs_ext_tags *tags, int obj_id,
-+ int inode_chunk)
-+{
-+ int j;
-+
-+ for (j = 0; the_chunk && j < dev->chunk_grp_size; j++) {
-+ if (yaffs_check_chunk_bit
-+ (dev, the_chunk / dev->param.chunks_per_block,
-+ the_chunk % dev->param.chunks_per_block)) {
-+
-+ if (dev->chunk_grp_size == 1)
-+ return the_chunk;
-+ else {
-+ yaffs_rd_chunk_tags_nand(dev, the_chunk, NULL,
-+ tags);
-+ if (yaffs_tags_match(tags,
-+ obj_id, inode_chunk)) {
-+ /* found it; */
-+ return the_chunk;
-+ }
-+ }
-+ }
-+ the_chunk++;
-+ }
-+ return -1;
-+}
-+
-+int yaffs_find_chunk_in_file(struct yaffs_obj *in, int inode_chunk,
-+ struct yaffs_ext_tags *tags)
-+{
-+ /*Get the Tnode, then get the level 0 offset chunk offset */
-+ struct yaffs_tnode *tn;
-+ int the_chunk = -1;
-+ struct yaffs_ext_tags local_tags;
-+ int ret_val = -1;
-+ struct yaffs_dev *dev = in->my_dev;
-+
-+ if (!tags) {
-+ /* Passed a NULL, so use our own tags space */
-+ tags = &local_tags;
-+ }
-+
-+ tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk);
-+
-+ if (!tn)
-+ return ret_val;
-+
-+ the_chunk = yaffs_get_group_base(dev, tn, inode_chunk);
-+
-+ ret_val = yaffs_find_chunk_in_group(dev, the_chunk, tags, in->obj_id,
-+ inode_chunk);
-+ return ret_val;
-+}
-+
-+static int yaffs_find_del_file_chunk(struct yaffs_obj *in, int inode_chunk,
-+ struct yaffs_ext_tags *tags)
-+{
-+ /* Get the Tnode, then get the level 0 offset chunk offset */
-+ struct yaffs_tnode *tn;
-+ int the_chunk = -1;
-+ struct yaffs_ext_tags local_tags;
-+ struct yaffs_dev *dev = in->my_dev;
-+ int ret_val = -1;
-+
-+ if (!tags) {
-+ /* Passed a NULL, so use our own tags space */
-+ tags = &local_tags;
-+ }
-+
-+ tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk);
-+
-+ if (!tn)
-+ return ret_val;
-+
-+ the_chunk = yaffs_get_group_base(dev, tn, inode_chunk);
-+
-+ ret_val = yaffs_find_chunk_in_group(dev, the_chunk, tags, in->obj_id,
-+ inode_chunk);
-+
-+ /* Delete the entry in the filestructure (if found) */
-+ if (ret_val != -1)
-+ yaffs_load_tnode_0(dev, tn, inode_chunk, 0);
-+
-+ return ret_val;
-+}
-+
-+int yaffs_put_chunk_in_file(struct yaffs_obj *in, int inode_chunk,
-+ int nand_chunk, int in_scan)
-+{
-+ /* NB in_scan is zero unless scanning.
-+ * For forward scanning, in_scan is > 0;
-+ * for backward scanning in_scan is < 0
-+ *
-+ * nand_chunk = 0 is a dummy insert to make sure the tnodes are there.
-+ */
-+
-+ struct yaffs_tnode *tn;
-+ struct yaffs_dev *dev = in->my_dev;
-+ int existing_cunk;
-+ struct yaffs_ext_tags existing_tags;
-+ struct yaffs_ext_tags new_tags;
-+ unsigned existing_serial, new_serial;
-+
-+ if (in->variant_type != YAFFS_OBJECT_TYPE_FILE) {
-+ /* Just ignore an attempt at putting a chunk into a non-file
-+ * during scanning.
-+ * If it is not during Scanning then something went wrong!
-+ */
-+ if (!in_scan) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs tragedy:attempt to put data chunk into a non-file"
-+ );
-+ BUG();
-+ }
-+
-+ yaffs_chunk_del(dev, nand_chunk, 1, __LINE__);
-+ return YAFFS_OK;
-+ }
-+
-+ tn = yaffs_add_find_tnode_0(dev,
-+ &in->variant.file_variant,
-+ inode_chunk, NULL);
-+ if (!tn)
-+ return YAFFS_FAIL;
-+
-+ if (!nand_chunk)
-+ /* Dummy insert, bail now */
-+ return YAFFS_OK;
-+
-+ existing_cunk = yaffs_get_group_base(dev, tn, inode_chunk);
-+
-+ if (in_scan != 0) {
-+ /* If we're scanning then we need to test for duplicates
-+ * NB This does not need to be efficient since it should only
-+ * happen when the power fails during a write, then only one
-+ * chunk should ever be affected.
-+ *
-+ * Correction for YAFFS2: This could happen quite a lot and we
-+ * need to think about efficiency! TODO
-+ * Update: For backward scanning we don't need to re-read tags
-+ * so this is quite cheap.
-+ */
-+
-+ if (existing_cunk > 0) {
-+ /* NB Right now existing chunk will not be real
-+ * chunk_id if the chunk group size > 1
-+ * thus we have to do a FindChunkInFile to get the
-+ * real chunk id.
-+ *
-+ * We have a duplicate now we need to decide which
-+ * one to use:
-+ *
-+ * Backwards scanning YAFFS2: The old one is what
-+ * we use, dump the new one.
-+ * YAFFS1: Get both sets of tags and compare serial
-+ * numbers.
-+ */
-+
-+ if (in_scan > 0) {
-+ /* Only do this for forward scanning */
-+ yaffs_rd_chunk_tags_nand(dev,
-+ nand_chunk,
-+ NULL, &new_tags);
-+
-+ /* Do a proper find */
-+ existing_cunk =
-+ yaffs_find_chunk_in_file(in, inode_chunk,
-+ &existing_tags);
-+ }
-+
-+ if (existing_cunk <= 0) {
-+ /*Hoosterman - how did this happen? */
-+
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs tragedy: existing chunk < 0 in scan"
-+ );
-+
-+ }
-+
-+ /* NB The deleted flags should be false, otherwise
-+ * the chunks will not be loaded during a scan
-+ */
-+
-+ if (in_scan > 0) {
-+ new_serial = new_tags.serial_number;
-+ existing_serial = existing_tags.serial_number;
-+ }
-+
-+ if ((in_scan > 0) &&
-+ (existing_cunk <= 0 ||
-+ ((existing_serial + 1) & 3) == new_serial)) {
-+ /* Forward scanning.
-+ * Use new
-+ * Delete the old one and drop through to
-+ * update the tnode
-+ */
-+ yaffs_chunk_del(dev, existing_cunk, 1,
-+ __LINE__);
-+ } else {
-+ /* Backward scanning or we want to use the
-+ * existing one
-+ * Delete the new one and return early so that
-+ * the tnode isn't changed
-+ */
-+ yaffs_chunk_del(dev, nand_chunk, 1, __LINE__);
-+ return YAFFS_OK;
-+ }
-+ }
-+
-+ }
-+
-+ if (existing_cunk == 0)
-+ in->n_data_chunks++;
-+
-+ yaffs_load_tnode_0(dev, tn, inode_chunk, nand_chunk);
-+
-+ return YAFFS_OK;
-+}
-+
-+static void yaffs_soft_del_chunk(struct yaffs_dev *dev, int chunk)
-+{
-+ struct yaffs_block_info *the_block;
-+ unsigned block_no;
-+
-+ yaffs_trace(YAFFS_TRACE_DELETION, "soft delete chunk %d", chunk);
-+
-+ block_no = chunk / dev->param.chunks_per_block;
-+ the_block = yaffs_get_block_info(dev, block_no);
-+ if (the_block) {
-+ the_block->soft_del_pages++;
-+ dev->n_free_chunks++;
-+ yaffs2_update_oldest_dirty_seq(dev, block_no, the_block);
-+ }
-+}
-+
-+/* SoftDeleteWorker scans backwards through the tnode tree and soft deletes all
-+ * the chunks in the file.
-+ * All soft deleting does is increment the block's softdelete count and pulls
-+ * the chunk out of the tnode.
-+ * Thus, essentially this is the same as DeleteWorker except that the chunks
-+ * are soft deleted.
-+ */
-+
-+static int yaffs_soft_del_worker(struct yaffs_obj *in, struct yaffs_tnode *tn,
-+ u32 level, int chunk_offset)
-+{
-+ int i;
-+ int the_chunk;
-+ int all_done = 1;
-+ struct yaffs_dev *dev = in->my_dev;
-+
-+ if (!tn)
-+ return 1;
-+
-+ if (level > 0) {
-+ for (i = YAFFS_NTNODES_INTERNAL - 1;
-+ all_done && i >= 0;
-+ i--) {
-+ if (tn->internal[i]) {
-+ all_done =
-+ yaffs_soft_del_worker(in,
-+ tn->internal[i],
-+ level - 1,
-+ (chunk_offset <<
-+ YAFFS_TNODES_INTERNAL_BITS)
-+ + i);
-+ if (all_done) {
-+ yaffs_free_tnode(dev,
-+ tn->internal[i]);
-+ tn->internal[i] = NULL;
-+ } else {
-+ /* Can this happen? */
-+ }
-+ }
-+ }
-+ return (all_done) ? 1 : 0;
-+ }
-+
-+ /* level 0 */
-+ for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) {
-+ the_chunk = yaffs_get_group_base(dev, tn, i);
-+ if (the_chunk) {
-+ yaffs_soft_del_chunk(dev, the_chunk);
-+ yaffs_load_tnode_0(dev, tn, i, 0);
-+ }
-+ }
-+ return 1;
-+}
-+
-+static void yaffs_remove_obj_from_dir(struct yaffs_obj *obj)
-+{
-+ struct yaffs_dev *dev = obj->my_dev;
-+ struct yaffs_obj *parent;
-+
-+ yaffs_verify_obj_in_dir(obj);
-+ parent = obj->parent;
-+
-+ yaffs_verify_dir(parent);
-+
-+ if (dev && dev->param.remove_obj_fn)
-+ dev->param.remove_obj_fn(obj);
-+
-+ list_del_init(&obj->siblings);
-+ obj->parent = NULL;
-+
-+ yaffs_verify_dir(parent);
-+}
-+
-+void yaffs_add_obj_to_dir(struct yaffs_obj *directory, struct yaffs_obj *obj)
-+{
-+ if (!directory) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "tragedy: Trying to add an object to a null pointer directory"
-+ );
-+ BUG();
-+ return;
-+ }
-+ if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "tragedy: Trying to add an object to a non-directory"
-+ );
-+ BUG();
-+ }
-+
-+ if (obj->siblings.prev == NULL) {
-+ /* Not initialised */
-+ BUG();
-+ }
-+
-+ yaffs_verify_dir(directory);
-+
-+ yaffs_remove_obj_from_dir(obj);
-+
-+ /* Now add it */
-+ list_add(&obj->siblings, &directory->variant.dir_variant.children);
-+ obj->parent = directory;
-+
-+ if (directory == obj->my_dev->unlinked_dir
-+ || directory == obj->my_dev->del_dir) {
-+ obj->unlinked = 1;
-+ obj->my_dev->n_unlinked_files++;
-+ obj->rename_allowed = 0;
-+ }
-+
-+ yaffs_verify_dir(directory);
-+ yaffs_verify_obj_in_dir(obj);
-+}
-+
-+static int yaffs_change_obj_name(struct yaffs_obj *obj,
-+ struct yaffs_obj *new_dir,
-+ const YCHAR *new_name, int force, int shadows)
-+{
-+ int unlink_op;
-+ int del_op;
-+ struct yaffs_obj *existing_target;
-+
-+ if (new_dir == NULL)
-+ new_dir = obj->parent; /* use the old directory */
-+
-+ if (new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "tragedy: yaffs_change_obj_name: new_dir is not a directory"
-+ );
-+ BUG();
-+ }
-+
-+ unlink_op = (new_dir == obj->my_dev->unlinked_dir);
-+ del_op = (new_dir == obj->my_dev->del_dir);
-+
-+ existing_target = yaffs_find_by_name(new_dir, new_name);
-+
-+ /* If the object is a file going into the unlinked directory,
-+ * then it is OK to just stuff it in since duplicate names are OK.
-+ * else only proceed if the new name does not exist and we're putting
-+ * it into a directory.
-+ */
-+ if (!(unlink_op || del_op || force ||
-+ shadows > 0 || !existing_target) ||
-+ new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
-+ return YAFFS_FAIL;
-+
-+ yaffs_set_obj_name(obj, new_name);
-+ obj->dirty = 1;
-+ yaffs_add_obj_to_dir(new_dir, obj);
-+
-+ if (unlink_op)
-+ obj->unlinked = 1;
-+
-+ /* If it is a deletion then we mark it as a shrink for gc */
-+ if (yaffs_update_oh(obj, new_name, 0, del_op, shadows, NULL) >= 0)
-+ return YAFFS_OK;
-+
-+ return YAFFS_FAIL;
-+}
-+
-+/*------------------------ Short Operations Cache ------------------------------
-+ * In many situations where there is no high level buffering a lot of
-+ * reads might be short sequential reads, and a lot of writes may be short
-+ * sequential writes. eg. scanning/writing a jpeg file.
-+ * In these cases, a short read/write cache can provide a huge perfomance
-+ * benefit with dumb-as-a-rock code.
-+ * In Linux, the page cache provides read buffering and the short op cache
-+ * provides write buffering.
-+ *
-+ * There are a small number (~10) of cache chunks per device so that we don't
-+ * need a very intelligent search.
-+ */
-+
-+static int yaffs_obj_cache_dirty(struct yaffs_obj *obj)
-+{
-+ struct yaffs_dev *dev = obj->my_dev;
-+ int i;
-+ struct yaffs_cache *cache;
-+ int n_caches = obj->my_dev->param.n_caches;
-+
-+ for (i = 0; i < n_caches; i++) {
-+ cache = &dev->cache[i];
-+ if (cache->object == obj && cache->dirty)
-+ return 1;
-+ }
-+
-+ return 0;
-+}
-+
-+static void yaffs_flush_single_cache(struct yaffs_cache *cache, int discard)
-+{
-+
-+ if (!cache || cache->locked)
-+ return;
-+
-+ /* Write it out and free it up if need be.*/
-+ if (cache->dirty) {
-+ yaffs_wr_data_obj(cache->object,
-+ cache->chunk_id,
-+ cache->data,
-+ cache->n_bytes,
-+ 1);
-+
-+ cache->dirty = 0;
-+ }
-+
-+ if (discard)
-+ cache->object = NULL;
-+}
-+
-+static void yaffs_flush_file_cache(struct yaffs_obj *obj, int discard)
-+{
-+ struct yaffs_dev *dev = obj->my_dev;
-+ int i;
-+ struct yaffs_cache *cache;
-+ int n_caches = obj->my_dev->param.n_caches;
-+
-+ if (n_caches < 1)
-+ return;
-+
-+
-+ /* Find the chunks for this object and flush them. */
-+ for (i = 0; i < n_caches; i++) {
-+ cache = &dev->cache[i];
-+ if (cache->object == obj)
-+ yaffs_flush_single_cache(cache, discard);
-+ }
-+
-+}
-+
-+
-+void yaffs_flush_whole_cache(struct yaffs_dev *dev, int discard)
-+{
-+ struct yaffs_obj *obj;
-+ int n_caches = dev->param.n_caches;
-+ int i;
-+
-+ /* Find a dirty object in the cache and flush it...
-+ * until there are no further dirty objects.
-+ */
-+ do {
-+ obj = NULL;
-+ for (i = 0; i < n_caches && !obj; i++) {
-+ if (dev->cache[i].object && dev->cache[i].dirty)
-+ obj = dev->cache[i].object;
-+ }
-+ if (obj)
-+ yaffs_flush_file_cache(obj, discard);
-+ } while (obj);
-+
-+}
-+
-+/* Grab us an unused cache chunk for use.
-+ * First look for an empty one.
-+ * Then look for the least recently used non-dirty one.
-+ * Then look for the least recently used dirty one...., flush and look again.
-+ */
-+static struct yaffs_cache *yaffs_grab_chunk_worker(struct yaffs_dev *dev)
-+{
-+ int i;
-+
-+ if (dev->param.n_caches > 0) {
-+ for (i = 0; i < dev->param.n_caches; i++) {
-+ if (!dev->cache[i].object)
-+ return &dev->cache[i];
-+ }
-+ }
-+
-+ return NULL;
-+}
-+
-+static struct yaffs_cache *yaffs_grab_chunk_cache(struct yaffs_dev *dev)
-+{
-+ struct yaffs_cache *cache;
-+ int usage;
-+ int i;
-+
-+ if (dev->param.n_caches < 1)
-+ return NULL;
-+
-+ /* First look for an unused cache */
-+
-+ cache = yaffs_grab_chunk_worker(dev);
-+
-+ if (cache)
-+ return cache;
-+
-+ /*
-+ * Thery were all in use.
-+ * Find the LRU cache and flush it if it is dirty.
-+ */
-+
-+ usage = -1;
-+ cache = NULL;
-+
-+ for (i = 0; i < dev->param.n_caches; i++) {
-+ if (dev->cache[i].object &&
-+ !dev->cache[i].locked &&
-+ (dev->cache[i].last_use < usage || !cache)) {
-+ usage = dev->cache[i].last_use;
-+ cache = &dev->cache[i];
-+ }
-+ }
-+
-+#if 1
-+ yaffs_flush_single_cache(cache, 1);
-+#else
-+ yaffs_flush_file_cache(cache->object, 1);
-+ cache = yaffs_grab_chunk_worker(dev);
-+#endif
-+
-+ return cache;
-+}
-+
-+/* Find a cached chunk */
-+static struct yaffs_cache *yaffs_find_chunk_cache(const struct yaffs_obj *obj,
-+ int chunk_id)
-+{
-+ struct yaffs_dev *dev = obj->my_dev;
-+ int i;
-+
-+ if (dev->param.n_caches < 1)
-+ return NULL;
-+
-+ for (i = 0; i < dev->param.n_caches; i++) {
-+ if (dev->cache[i].object == obj &&
-+ dev->cache[i].chunk_id == chunk_id) {
-+ dev->cache_hits++;
-+
-+ return &dev->cache[i];
-+ }
-+ }
-+ return NULL;
-+}
-+
-+/* Mark the chunk for the least recently used algorithym */
-+static void yaffs_use_cache(struct yaffs_dev *dev, struct yaffs_cache *cache,
-+ int is_write)
-+{
-+ int i;
-+
-+ if (dev->param.n_caches < 1)
-+ return;
-+
-+ if (dev->cache_last_use < 0 ||
-+ dev->cache_last_use > 100000000) {
-+ /* Reset the cache usages */
-+ for (i = 1; i < dev->param.n_caches; i++)
-+ dev->cache[i].last_use = 0;
-+
-+ dev->cache_last_use = 0;
-+ }
-+ dev->cache_last_use++;
-+ cache->last_use = dev->cache_last_use;
-+
-+ if (is_write)
-+ cache->dirty = 1;
-+}
-+
-+/* Invalidate a single cache page.
-+ * Do this when a whole page gets written,
-+ * ie the short cache for this page is no longer valid.
-+ */
-+static void yaffs_invalidate_chunk_cache(struct yaffs_obj *object, int chunk_id)
-+{
-+ struct yaffs_cache *cache;
-+
-+ if (object->my_dev->param.n_caches > 0) {
-+ cache = yaffs_find_chunk_cache(object, chunk_id);
-+
-+ if (cache)
-+ cache->object = NULL;
-+ }
-+}
-+
-+/* Invalidate all the cache pages associated with this object
-+ * Do this whenever ther file is deleted or resized.
-+ */
-+static void yaffs_invalidate_whole_cache(struct yaffs_obj *in)
-+{
-+ int i;
-+ struct yaffs_dev *dev = in->my_dev;
-+
-+ if (dev->param.n_caches > 0) {
-+ /* Invalidate it. */
-+ for (i = 0; i < dev->param.n_caches; i++) {
-+ if (dev->cache[i].object == in)
-+ dev->cache[i].object = NULL;
-+ }
-+ }
-+}
-+
-+static void yaffs_unhash_obj(struct yaffs_obj *obj)
-+{
-+ int bucket;
-+ struct yaffs_dev *dev = obj->my_dev;
-+
-+ /* If it is still linked into the bucket list, free from the list */
-+ if (!list_empty(&obj->hash_link)) {
-+ list_del_init(&obj->hash_link);
-+ bucket = yaffs_hash_fn(obj->obj_id);
-+ dev->obj_bucket[bucket].count--;
-+ }
-+}
-+
-+/* FreeObject frees up a Object and puts it back on the free list */
-+static void yaffs_free_obj(struct yaffs_obj *obj)
-+{
-+ struct yaffs_dev *dev;
-+
-+ if (!obj) {
-+ BUG();
-+ return;
-+ }
-+ dev = obj->my_dev;
-+ yaffs_trace(YAFFS_TRACE_OS, "FreeObject %p inode %p",
-+ obj, obj->my_inode);
-+ if (obj->parent)
-+ BUG();
-+ if (!list_empty(&obj->siblings))
-+ BUG();
-+
-+ if (obj->my_inode) {
-+ /* We're still hooked up to a cached inode.
-+ * Don't delete now, but mark for later deletion
-+ */
-+ obj->defered_free = 1;
-+ return;
-+ }
-+
-+ yaffs_unhash_obj(obj);
-+
-+ yaffs_free_raw_obj(dev, obj);
-+ dev->n_obj--;
-+ dev->checkpoint_blocks_required = 0; /* force recalculation */
-+}
-+
-+void yaffs_handle_defered_free(struct yaffs_obj *obj)
-+{
-+ if (obj->defered_free)
-+ yaffs_free_obj(obj);
-+}
-+
-+static int yaffs_generic_obj_del(struct yaffs_obj *in)
-+{
-+ /* Iinvalidate the file's data in the cache, without flushing. */
-+ yaffs_invalidate_whole_cache(in);
-+
-+ if (in->my_dev->param.is_yaffs2 && in->parent != in->my_dev->del_dir) {
-+ /* Move to unlinked directory so we have a deletion record */
-+ yaffs_change_obj_name(in, in->my_dev->del_dir, _Y("deleted"), 0,
-+ 0);
-+ }
-+
-+ yaffs_remove_obj_from_dir(in);
-+ yaffs_chunk_del(in->my_dev, in->hdr_chunk, 1, __LINE__);
-+ in->hdr_chunk = 0;
-+
-+ yaffs_free_obj(in);
-+ return YAFFS_OK;
-+
-+}
-+
-+static void yaffs_soft_del_file(struct yaffs_obj *obj)
-+{
-+ if (!obj->deleted ||
-+ obj->variant_type != YAFFS_OBJECT_TYPE_FILE ||
-+ obj->soft_del)
-+ return;
-+
-+ if (obj->n_data_chunks <= 0) {
-+ /* Empty file with no duplicate object headers,
-+ * just delete it immediately */
-+ yaffs_free_tnode(obj->my_dev, obj->variant.file_variant.top);
-+ obj->variant.file_variant.top = NULL;
-+ yaffs_trace(YAFFS_TRACE_TRACING,
-+ "yaffs: Deleting empty file %d",
-+ obj->obj_id);
-+ yaffs_generic_obj_del(obj);
-+ } else {
-+ yaffs_soft_del_worker(obj,
-+ obj->variant.file_variant.top,
-+ obj->variant.
-+ file_variant.top_level, 0);
-+ obj->soft_del = 1;
-+ }
-+}
-+
-+/* Pruning removes any part of the file structure tree that is beyond the
-+ * bounds of the file (ie that does not point to chunks).
-+ *
-+ * A file should only get pruned when its size is reduced.
-+ *
-+ * Before pruning, the chunks must be pulled from the tree and the
-+ * level 0 tnode entries must be zeroed out.
-+ * Could also use this for file deletion, but that's probably better handled
-+ * by a special case.
-+ *
-+ * This function is recursive. For levels > 0 the function is called again on
-+ * any sub-tree. For level == 0 we just check if the sub-tree has data.
-+ * If there is no data in a subtree then it is pruned.
-+ */
-+
-+static struct yaffs_tnode *yaffs_prune_worker(struct yaffs_dev *dev,
-+ struct yaffs_tnode *tn, u32 level,
-+ int del0)
-+{
-+ int i;
-+ int has_data;
-+
-+ if (!tn)
-+ return tn;
-+
-+ has_data = 0;
-+
-+ if (level > 0) {
-+ for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) {
-+ if (tn->internal[i]) {
-+ tn->internal[i] =
-+ yaffs_prune_worker(dev,
-+ tn->internal[i],
-+ level - 1,
-+ (i == 0) ? del0 : 1);
-+ }
-+
-+ if (tn->internal[i])
-+ has_data++;
-+ }
-+ } else {
-+ int tnode_size_u32 = dev->tnode_size / sizeof(u32);
-+ u32 *map = (u32 *) tn;
-+
-+ for (i = 0; !has_data && i < tnode_size_u32; i++) {
-+ if (map[i])
-+ has_data++;
-+ }
-+ }
-+
-+ if (has_data == 0 && del0) {
-+ /* Free and return NULL */
-+ yaffs_free_tnode(dev, tn);
-+ tn = NULL;
-+ }
-+ return tn;
-+}
-+
-+static int yaffs_prune_tree(struct yaffs_dev *dev,
-+ struct yaffs_file_var *file_struct)
-+{
-+ int i;
-+ int has_data;
-+ int done = 0;
-+ struct yaffs_tnode *tn;
-+
-+ if (file_struct->top_level < 1)
-+ return YAFFS_OK;
-+
-+ file_struct->top =
-+ yaffs_prune_worker(dev, file_struct->top, file_struct->top_level, 0);
-+
-+ /* Now we have a tree with all the non-zero branches NULL but
-+ * the height is the same as it was.
-+ * Let's see if we can trim internal tnodes to shorten the tree.
-+ * We can do this if only the 0th element in the tnode is in use
-+ * (ie all the non-zero are NULL)
-+ */
-+
-+ while (file_struct->top_level && !done) {
-+ tn = file_struct->top;
-+
-+ has_data = 0;
-+ for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) {
-+ if (tn->internal[i])
-+ has_data++;
-+ }
-+
-+ if (!has_data) {
-+ file_struct->top = tn->internal[0];
-+ file_struct->top_level--;
-+ yaffs_free_tnode(dev, tn);
-+ } else {
-+ done = 1;
-+ }
-+ }
-+
-+ return YAFFS_OK;
-+}
-+
-+/*-------------------- End of File Structure functions.-------------------*/
-+
-+/* alloc_empty_obj gets us a clean Object.*/
-+static struct yaffs_obj *yaffs_alloc_empty_obj(struct yaffs_dev *dev)
-+{
-+ struct yaffs_obj *obj = yaffs_alloc_raw_obj(dev);
-+
-+ if (!obj)
-+ return obj;
-+
-+ dev->n_obj++;
-+
-+ /* Now sweeten it up... */
-+
-+ memset(obj, 0, sizeof(struct yaffs_obj));
-+ obj->being_created = 1;
-+
-+ obj->my_dev = dev;
-+ obj->hdr_chunk = 0;
-+ obj->variant_type = YAFFS_OBJECT_TYPE_UNKNOWN;
-+ INIT_LIST_HEAD(&(obj->hard_links));
-+ INIT_LIST_HEAD(&(obj->hash_link));
-+ INIT_LIST_HEAD(&obj->siblings);
-+
-+ /* Now make the directory sane */
-+ if (dev->root_dir) {
-+ obj->parent = dev->root_dir;
-+ list_add(&(obj->siblings),
-+ &dev->root_dir->variant.dir_variant.children);
-+ }
-+
-+ /* Add it to the lost and found directory.
-+ * NB Can't put root or lost-n-found in lost-n-found so
-+ * check if lost-n-found exists first
-+ */
-+ if (dev->lost_n_found)
-+ yaffs_add_obj_to_dir(dev->lost_n_found, obj);
-+
-+ obj->being_created = 0;
-+
-+ dev->checkpoint_blocks_required = 0; /* force recalculation */
-+
-+ return obj;
-+}
-+
-+static int yaffs_find_nice_bucket(struct yaffs_dev *dev)
-+{
-+ int i;
-+ int l = 999;
-+ int lowest = 999999;
-+
-+ /* Search for the shortest list or one that
-+ * isn't too long.
-+ */
-+
-+ for (i = 0; i < 10 && lowest > 4; i++) {
-+ dev->bucket_finder++;
-+ dev->bucket_finder %= YAFFS_NOBJECT_BUCKETS;
-+ if (dev->obj_bucket[dev->bucket_finder].count < lowest) {
-+ lowest = dev->obj_bucket[dev->bucket_finder].count;
-+ l = dev->bucket_finder;
-+ }
-+ }
-+
-+ return l;
-+}
-+
-+static int yaffs_new_obj_id(struct yaffs_dev *dev)
-+{
-+ int bucket = yaffs_find_nice_bucket(dev);
-+ int found = 0;
-+ struct list_head *i;
-+ u32 n = (u32) bucket;
-+
-+ /*
-+ * Now find an object value that has not already been taken
-+ * by scanning the list, incrementing each time by number of buckets.
-+ */
-+ while (!found) {
-+ found = 1;
-+ n += YAFFS_NOBJECT_BUCKETS;
-+ list_for_each(i, &dev->obj_bucket[bucket].list) {
-+ /* Check if this value is already taken. */
-+ if (i && list_entry(i, struct yaffs_obj,
-+ hash_link)->obj_id == n)
-+ found = 0;
-+ }
-+ }
-+ return n;
-+}
-+
-+static void yaffs_hash_obj(struct yaffs_obj *in)
-+{
-+ int bucket = yaffs_hash_fn(in->obj_id);
-+ struct yaffs_dev *dev = in->my_dev;
-+
-+ list_add(&in->hash_link, &dev->obj_bucket[bucket].list);
-+ dev->obj_bucket[bucket].count++;
-+}
-+
-+struct yaffs_obj *yaffs_find_by_number(struct yaffs_dev *dev, u32 number)
-+{
-+ int bucket = yaffs_hash_fn(number);
-+ struct list_head *i;
-+ struct yaffs_obj *in;
-+
-+ list_for_each(i, &dev->obj_bucket[bucket].list) {
-+ /* Look if it is in the list */
-+ in = list_entry(i, struct yaffs_obj, hash_link);
-+ if (in->obj_id == number) {
-+ /* Don't show if it is defered free */
-+ if (in->defered_free)
-+ return NULL;
-+ return in;
-+ }
-+ }
-+
-+ return NULL;
-+}
-+
-+static struct yaffs_obj *yaffs_new_obj(struct yaffs_dev *dev, int number,
-+ enum yaffs_obj_type type)
-+{
-+ struct yaffs_obj *the_obj = NULL;
-+ struct yaffs_tnode *tn = NULL;
-+
-+ if (number < 0)
-+ number = yaffs_new_obj_id(dev);
-+
-+ if (type == YAFFS_OBJECT_TYPE_FILE) {
-+ tn = yaffs_get_tnode(dev);
-+ if (!tn)
-+ return NULL;
-+ }
-+
-+ the_obj = yaffs_alloc_empty_obj(dev);
-+ if (!the_obj) {
-+ if (tn)
-+ yaffs_free_tnode(dev, tn);
-+ return NULL;
-+ }
-+
-+ the_obj->fake = 0;
-+ the_obj->rename_allowed = 1;
-+ the_obj->unlink_allowed = 1;
-+ the_obj->obj_id = number;
-+ yaffs_hash_obj(the_obj);
-+ the_obj->variant_type = type;
-+ yaffs_load_current_time(the_obj, 1, 1);
-+
-+ switch (type) {
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ the_obj->variant.file_variant.file_size = 0;
-+ the_obj->variant.file_variant.scanned_size = 0;
-+ the_obj->variant.file_variant.shrink_size =
-+ yaffs_max_file_size(dev);
-+ the_obj->variant.file_variant.top_level = 0;
-+ the_obj->variant.file_variant.top = tn;
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ INIT_LIST_HEAD(&the_obj->variant.dir_variant.children);
-+ INIT_LIST_HEAD(&the_obj->variant.dir_variant.dirty);
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ /* No action required */
-+ break;
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ /* todo this should not happen */
-+ break;
-+ }
-+ return the_obj;
-+}
-+
-+static struct yaffs_obj *yaffs_create_fake_dir(struct yaffs_dev *dev,
-+ int number, u32 mode)
-+{
-+
-+ struct yaffs_obj *obj =
-+ yaffs_new_obj(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY);
-+
-+ if (!obj)
-+ return NULL;
-+
-+ obj->fake = 1; /* it is fake so it might not use NAND */
-+ obj->rename_allowed = 0;
-+ obj->unlink_allowed = 0;
-+ obj->deleted = 0;
-+ obj->unlinked = 0;
-+ obj->yst_mode = mode;
-+ obj->my_dev = dev;
-+ obj->hdr_chunk = 0; /* Not a valid chunk. */
-+ return obj;
-+
-+}
-+
-+
-+static void yaffs_init_tnodes_and_objs(struct yaffs_dev *dev)
-+{
-+ int i;
-+
-+ dev->n_obj = 0;
-+ dev->n_tnodes = 0;
-+ yaffs_init_raw_tnodes_and_objs(dev);
-+
-+ for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
-+ INIT_LIST_HEAD(&dev->obj_bucket[i].list);
-+ dev->obj_bucket[i].count = 0;
-+ }
-+}
-+
-+struct yaffs_obj *yaffs_find_or_create_by_number(struct yaffs_dev *dev,
-+ int number,
-+ enum yaffs_obj_type type)
-+{
-+ struct yaffs_obj *the_obj = NULL;
-+
-+ if (number > 0)
-+ the_obj = yaffs_find_by_number(dev, number);
-+
-+ if (!the_obj)
-+ the_obj = yaffs_new_obj(dev, number, type);
-+
-+ return the_obj;
-+
-+}
-+
-+YCHAR *yaffs_clone_str(const YCHAR *str)
-+{
-+ YCHAR *new_str = NULL;
-+ int len;
-+
-+ if (!str)
-+ str = _Y("");
-+
-+ len = strnlen(str, YAFFS_MAX_ALIAS_LENGTH);
-+ new_str = kmalloc((len + 1) * sizeof(YCHAR), GFP_NOFS);
-+ if (new_str) {
-+ strncpy(new_str, str, len);
-+ new_str[len] = 0;
-+ }
-+ return new_str;
-+
-+}
-+/*
-+ *yaffs_update_parent() handles fixing a directories mtime and ctime when a new
-+ * link (ie. name) is created or deleted in the directory.
-+ *
-+ * ie.
-+ * create dir/a : update dir's mtime/ctime
-+ * rm dir/a: update dir's mtime/ctime
-+ * modify dir/a: don't update dir's mtimme/ctime
-+ *
-+ * This can be handled immediately or defered. Defering helps reduce the number
-+ * of updates when many files in a directory are changed within a brief period.
-+ *
-+ * If the directory updating is defered then yaffs_update_dirty_dirs must be
-+ * called periodically.
-+ */
-+
-+static void yaffs_update_parent(struct yaffs_obj *obj)
-+{
-+ struct yaffs_dev *dev;
-+
-+ if (!obj)
-+ return;
-+ dev = obj->my_dev;
-+ obj->dirty = 1;
-+ yaffs_load_current_time(obj, 0, 1);
-+ if (dev->param.defered_dir_update) {
-+ struct list_head *link = &obj->variant.dir_variant.dirty;
-+
-+ if (list_empty(link)) {
-+ list_add(link, &dev->dirty_dirs);
-+ yaffs_trace(YAFFS_TRACE_BACKGROUND,
-+ "Added object %d to dirty directories",
-+ obj->obj_id);
-+ }
-+
-+ } else {
-+ yaffs_update_oh(obj, NULL, 0, 0, 0, NULL);
-+ }
-+}
-+
-+void yaffs_update_dirty_dirs(struct yaffs_dev *dev)
-+{
-+ struct list_head *link;
-+ struct yaffs_obj *obj;
-+ struct yaffs_dir_var *d_s;
-+ union yaffs_obj_var *o_v;
-+
-+ yaffs_trace(YAFFS_TRACE_BACKGROUND, "Update dirty directories");
-+
-+ while (!list_empty(&dev->dirty_dirs)) {
-+ link = dev->dirty_dirs.next;
-+ list_del_init(link);
-+
-+ d_s = list_entry(link, struct yaffs_dir_var, dirty);
-+ o_v = list_entry(d_s, union yaffs_obj_var, dir_variant);
-+ obj = list_entry(o_v, struct yaffs_obj, variant);
-+
-+ yaffs_trace(YAFFS_TRACE_BACKGROUND, "Update directory %d",
-+ obj->obj_id);
-+
-+ if (obj->dirty)
-+ yaffs_update_oh(obj, NULL, 0, 0, 0, NULL);
-+ }
-+}
-+
-+/*
-+ * Mknod (create) a new object.
-+ * equiv_obj only has meaning for a hard link;
-+ * alias_str only has meaning for a symlink.
-+ * rdev only has meaning for devices (a subset of special objects)
-+ */
-+
-+static struct yaffs_obj *yaffs_create_obj(enum yaffs_obj_type type,
-+ struct yaffs_obj *parent,
-+ const YCHAR *name,
-+ u32 mode,
-+ u32 uid,
-+ u32 gid,
-+ struct yaffs_obj *equiv_obj,
-+ const YCHAR *alias_str, u32 rdev)
-+{
-+ struct yaffs_obj *in;
-+ YCHAR *str = NULL;
-+ struct yaffs_dev *dev = parent->my_dev;
-+
-+ /* Check if the entry exists.
-+ * If it does then fail the call since we don't want a dup. */
-+ if (yaffs_find_by_name(parent, name))
-+ return NULL;
-+
-+ if (type == YAFFS_OBJECT_TYPE_SYMLINK) {
-+ str = yaffs_clone_str(alias_str);
-+ if (!str)
-+ return NULL;
-+ }
-+
-+ in = yaffs_new_obj(dev, -1, type);
-+
-+ if (!in) {
-+ kfree(str);
-+ return NULL;
-+ }
-+
-+ in->hdr_chunk = 0;
-+ in->valid = 1;
-+ in->variant_type = type;
-+
-+ in->yst_mode = mode;
-+
-+ yaffs_attribs_init(in, gid, uid, rdev);
-+
-+ in->n_data_chunks = 0;
-+
-+ yaffs_set_obj_name(in, name);
-+ in->dirty = 1;
-+
-+ yaffs_add_obj_to_dir(parent, in);
-+
-+ in->my_dev = parent->my_dev;
-+
-+ switch (type) {
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ in->variant.symlink_variant.alias = str;
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ in->variant.hardlink_variant.equiv_obj = equiv_obj;
-+ in->variant.hardlink_variant.equiv_id = equiv_obj->obj_id;
-+ list_add(&in->hard_links, &equiv_obj->hard_links);
-+ break;
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ /* do nothing */
-+ break;
-+ }
-+
-+ if (yaffs_update_oh(in, name, 0, 0, 0, NULL) < 0) {
-+ /* Could not create the object header, fail */
-+ yaffs_del_obj(in);
-+ in = NULL;
-+ }
-+
-+ if (in)
-+ yaffs_update_parent(parent);
-+
-+ return in;
-+}
-+
-+struct yaffs_obj *yaffs_create_file(struct yaffs_obj *parent,
-+ const YCHAR *name, u32 mode, u32 uid,
-+ u32 gid)
-+{
-+ return yaffs_create_obj(YAFFS_OBJECT_TYPE_FILE, parent, name, mode,
-+ uid, gid, NULL, NULL, 0);
-+}
-+
-+struct yaffs_obj *yaffs_create_dir(struct yaffs_obj *parent, const YCHAR *name,
-+ u32 mode, u32 uid, u32 gid)
-+{
-+ return yaffs_create_obj(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name,
-+ mode, uid, gid, NULL, NULL, 0);
-+}
-+
-+struct yaffs_obj *yaffs_create_special(struct yaffs_obj *parent,
-+ const YCHAR *name, u32 mode, u32 uid,
-+ u32 gid, u32 rdev)
-+{
-+ return yaffs_create_obj(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode,
-+ uid, gid, NULL, NULL, rdev);
-+}
-+
-+struct yaffs_obj *yaffs_create_symlink(struct yaffs_obj *parent,
-+ const YCHAR *name, u32 mode, u32 uid,
-+ u32 gid, const YCHAR *alias)
-+{
-+ return yaffs_create_obj(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode,
-+ uid, gid, NULL, alias, 0);
-+}
-+
-+/* yaffs_link_obj returns the object id of the equivalent object.*/
-+struct yaffs_obj *yaffs_link_obj(struct yaffs_obj *parent, const YCHAR * name,
-+ struct yaffs_obj *equiv_obj)
-+{
-+ /* Get the real object in case we were fed a hard link obj */
-+ equiv_obj = yaffs_get_equivalent_obj(equiv_obj);
-+
-+ if (yaffs_create_obj(YAFFS_OBJECT_TYPE_HARDLINK,
-+ parent, name, 0, 0, 0,
-+ equiv_obj, NULL, 0))
-+ return equiv_obj;
-+
-+ return NULL;
-+
-+}
-+
-+
-+
-+/*---------------------- Block Management and Page Allocation -------------*/
-+
-+static void yaffs_deinit_blocks(struct yaffs_dev *dev)
-+{
-+ if (dev->block_info_alt && dev->block_info)
-+ vfree(dev->block_info);
-+ else
-+ kfree(dev->block_info);
-+
-+ dev->block_info_alt = 0;
-+
-+ dev->block_info = NULL;
-+
-+ if (dev->chunk_bits_alt && dev->chunk_bits)
-+ vfree(dev->chunk_bits);
-+ else
-+ kfree(dev->chunk_bits);
-+ dev->chunk_bits_alt = 0;
-+ dev->chunk_bits = NULL;
-+}
-+
-+static int yaffs_init_blocks(struct yaffs_dev *dev)
-+{
-+ int n_blocks = dev->internal_end_block - dev->internal_start_block + 1;
-+
-+ dev->block_info = NULL;
-+ dev->chunk_bits = NULL;
-+ dev->alloc_block = -1; /* force it to get a new one */
-+
-+ /* If the first allocation strategy fails, thry the alternate one */
-+ dev->block_info =
-+ kmalloc(n_blocks * sizeof(struct yaffs_block_info), GFP_NOFS);
-+ if (!dev->block_info) {
-+ dev->block_info =
-+ vmalloc(n_blocks * sizeof(struct yaffs_block_info));
-+ dev->block_info_alt = 1;
-+ } else {
-+ dev->block_info_alt = 0;
-+ }
-+
-+ if (!dev->block_info)
-+ goto alloc_error;
-+
-+ /* Set up dynamic blockinfo stuff. Round up bytes. */
-+ dev->chunk_bit_stride = (dev->param.chunks_per_block + 7) / 8;
-+ dev->chunk_bits =
-+ kmalloc(dev->chunk_bit_stride * n_blocks, GFP_NOFS);
-+ if (!dev->chunk_bits) {
-+ dev->chunk_bits =
-+ vmalloc(dev->chunk_bit_stride * n_blocks);
-+ dev->chunk_bits_alt = 1;
-+ } else {
-+ dev->chunk_bits_alt = 0;
-+ }
-+ if (!dev->chunk_bits)
-+ goto alloc_error;
-+
-+
-+ memset(dev->block_info, 0, n_blocks * sizeof(struct yaffs_block_info));
-+ memset(dev->chunk_bits, 0, dev->chunk_bit_stride * n_blocks);
-+ return YAFFS_OK;
-+
-+alloc_error:
-+ yaffs_deinit_blocks(dev);
-+ return YAFFS_FAIL;
-+}
-+
-+
-+void yaffs_block_became_dirty(struct yaffs_dev *dev, int block_no)
-+{
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, block_no);
-+ int erased_ok = 0;
-+ int i;
-+
-+ /* If the block is still healthy erase it and mark as clean.
-+ * If the block has had a data failure, then retire it.
-+ */
-+
-+ yaffs_trace(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE,
-+ "yaffs_block_became_dirty block %d state %d %s",
-+ block_no, bi->block_state,
-+ (bi->needs_retiring) ? "needs retiring" : "");
-+
-+ yaffs2_clear_oldest_dirty_seq(dev, bi);
-+
-+ bi->block_state = YAFFS_BLOCK_STATE_DIRTY;
-+
-+ /* If this is the block being garbage collected then stop gc'ing */
-+ if (block_no == dev->gc_block)
-+ dev->gc_block = 0;
-+
-+ /* If this block is currently the best candidate for gc
-+ * then drop as a candidate */
-+ if (block_no == dev->gc_dirtiest) {
-+ dev->gc_dirtiest = 0;
-+ dev->gc_pages_in_use = 0;
-+ }
-+
-+ if (!bi->needs_retiring) {
-+ yaffs2_checkpt_invalidate(dev);
-+ erased_ok = yaffs_erase_block(dev, block_no);
-+ if (!erased_ok) {
-+ dev->n_erase_failures++;
-+ yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
-+ "**>> Erasure failed %d", block_no);
-+ }
-+ }
-+
-+ /* Verify erasure if needed */
-+ if (erased_ok &&
-+ ((yaffs_trace_mask & YAFFS_TRACE_ERASE) ||
-+ !yaffs_skip_verification(dev))) {
-+ for (i = 0; i < dev->param.chunks_per_block; i++) {
-+ if (!yaffs_check_chunk_erased(dev,
-+ block_no * dev->param.chunks_per_block + i)) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ ">>Block %d erasure supposedly OK, but chunk %d not erased",
-+ block_no, i);
-+ }
-+ }
-+ }
-+
-+ if (!erased_ok) {
-+ /* We lost a block of free space */
-+ dev->n_free_chunks -= dev->param.chunks_per_block;
-+ yaffs_retire_block(dev, block_no);
-+ yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
-+ "**>> Block %d retired", block_no);
-+ return;
-+ }
-+
-+ /* Clean it up... */
-+ bi->block_state = YAFFS_BLOCK_STATE_EMPTY;
-+ bi->seq_number = 0;
-+ dev->n_erased_blocks++;
-+ bi->pages_in_use = 0;
-+ bi->soft_del_pages = 0;
-+ bi->has_shrink_hdr = 0;
-+ bi->skip_erased_check = 1; /* Clean, so no need to check */
-+ bi->gc_prioritise = 0;
-+ bi->has_summary = 0;
-+
-+ yaffs_clear_chunk_bits(dev, block_no);
-+
-+ yaffs_trace(YAFFS_TRACE_ERASE, "Erased block %d", block_no);
-+}
-+
-+static inline int yaffs_gc_process_chunk(struct yaffs_dev *dev,
-+ struct yaffs_block_info *bi,
-+ int old_chunk, u8 *buffer)
-+{
-+ int new_chunk;
-+ int mark_flash = 1;
-+ struct yaffs_ext_tags tags;
-+ struct yaffs_obj *object;
-+ int matching_chunk;
-+ int ret_val = YAFFS_OK;
-+
-+ memset(&tags, 0, sizeof(tags));
-+ yaffs_rd_chunk_tags_nand(dev, old_chunk,
-+ buffer, &tags);
-+ object = yaffs_find_by_number(dev, tags.obj_id);
-+
-+ yaffs_trace(YAFFS_TRACE_GC_DETAIL,
-+ "Collecting chunk in block %d, %d %d %d ",
-+ dev->gc_chunk, tags.obj_id,
-+ tags.chunk_id, tags.n_bytes);
-+
-+ if (object && !yaffs_skip_verification(dev)) {
-+ if (tags.chunk_id == 0)
-+ matching_chunk =
-+ object->hdr_chunk;
-+ else if (object->soft_del)
-+ /* Defeat the test */
-+ matching_chunk = old_chunk;
-+ else
-+ matching_chunk =
-+ yaffs_find_chunk_in_file
-+ (object, tags.chunk_id,
-+ NULL);
-+
-+ if (old_chunk != matching_chunk)
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "gc: page in gc mismatch: %d %d %d %d",
-+ old_chunk,
-+ matching_chunk,
-+ tags.obj_id,
-+ tags.chunk_id);
-+ }
-+
-+ if (!object) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "page %d in gc has no object: %d %d %d ",
-+ old_chunk,
-+ tags.obj_id, tags.chunk_id,
-+ tags.n_bytes);
-+ }
-+
-+ if (object &&
-+ object->deleted &&
-+ object->soft_del && tags.chunk_id != 0) {
-+ /* Data chunk in a soft deleted file,
-+ * throw it away.
-+ * It's a soft deleted data chunk,
-+ * No need to copy this, just forget
-+ * about it and fix up the object.
-+ */
-+
-+ /* Free chunks already includes
-+ * softdeleted chunks, how ever this
-+ * chunk is going to soon be really
-+ * deleted which will increment free
-+ * chunks. We have to decrement free
-+ * chunks so this works out properly.
-+ */
-+ dev->n_free_chunks--;
-+ bi->soft_del_pages--;
-+
-+ object->n_data_chunks--;
-+ if (object->n_data_chunks <= 0) {
-+ /* remeber to clean up obj */
-+ dev->gc_cleanup_list[dev->n_clean_ups] = tags.obj_id;
-+ dev->n_clean_ups++;
-+ }
-+ mark_flash = 0;
-+ } else if (object) {
-+ /* It's either a data chunk in a live
-+ * file or an ObjectHeader, so we're
-+ * interested in it.
-+ * NB Need to keep the ObjectHeaders of
-+ * deleted files until the whole file
-+ * has been deleted off
-+ */
-+ tags.serial_number++;
-+ dev->n_gc_copies++;
-+
-+ if (tags.chunk_id == 0) {
-+ /* It is an object Id,
-+ * We need to nuke the
-+ * shrinkheader flags since its
-+ * work is done.
-+ * Also need to clean up
-+ * shadowing.
-+ */
-+ struct yaffs_obj_hdr *oh;
-+ oh = (struct yaffs_obj_hdr *) buffer;
-+
-+ oh->is_shrink = 0;
-+ tags.extra_is_shrink = 0;
-+ oh->shadows_obj = 0;
-+ oh->inband_shadowed_obj_id = 0;
-+ tags.extra_shadows = 0;
-+
-+ /* Update file size */
-+ if (object->variant_type == YAFFS_OBJECT_TYPE_FILE) {
-+ yaffs_oh_size_load(oh,
-+ object->variant.file_variant.file_size);
-+ tags.extra_file_size =
-+ object->variant.file_variant.file_size;
-+ }
-+
-+ yaffs_verify_oh(object, oh, &tags, 1);
-+ new_chunk =
-+ yaffs_write_new_chunk(dev, (u8 *) oh, &tags, 1);
-+ } else {
-+ new_chunk =
-+ yaffs_write_new_chunk(dev, buffer, &tags, 1);
-+ }
-+
-+ if (new_chunk < 0) {
-+ ret_val = YAFFS_FAIL;
-+ } else {
-+
-+ /* Now fix up the Tnodes etc. */
-+
-+ if (tags.chunk_id == 0) {
-+ /* It's a header */
-+ object->hdr_chunk = new_chunk;
-+ object->serial = tags.serial_number;
-+ } else {
-+ /* It's a data chunk */
-+ yaffs_put_chunk_in_file(object, tags.chunk_id,
-+ new_chunk, 0);
-+ }
-+ }
-+ }
-+ if (ret_val == YAFFS_OK)
-+ yaffs_chunk_del(dev, old_chunk, mark_flash, __LINE__);
-+ return ret_val;
-+}
-+
-+static int yaffs_gc_block(struct yaffs_dev *dev, int block, int whole_block)
-+{
-+ int old_chunk;
-+ int ret_val = YAFFS_OK;
-+ int i;
-+ int is_checkpt_block;
-+ int max_copies;
-+ int chunks_before = yaffs_get_erased_chunks(dev);
-+ int chunks_after;
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, block);
-+
-+ is_checkpt_block = (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT);
-+
-+ yaffs_trace(YAFFS_TRACE_TRACING,
-+ "Collecting block %d, in use %d, shrink %d, whole_block %d",
-+ block, bi->pages_in_use, bi->has_shrink_hdr,
-+ whole_block);
-+
-+ /*yaffs_verify_free_chunks(dev); */
-+
-+ if (bi->block_state == YAFFS_BLOCK_STATE_FULL)
-+ bi->block_state = YAFFS_BLOCK_STATE_COLLECTING;
-+
-+ bi->has_shrink_hdr = 0; /* clear the flag so that the block can erase */
-+
-+ dev->gc_disable = 1;
-+
-+ yaffs_summary_gc(dev, block);
-+
-+ if (is_checkpt_block || !yaffs_still_some_chunks(dev, block)) {
-+ yaffs_trace(YAFFS_TRACE_TRACING,
-+ "Collecting block %d that has no chunks in use",
-+ block);
-+ yaffs_block_became_dirty(dev, block);
-+ } else {
-+
-+ u8 *buffer = yaffs_get_temp_buffer(dev);
-+
-+ yaffs_verify_blk(dev, bi, block);
-+
-+ max_copies = (whole_block) ? dev->param.chunks_per_block : 5;
-+ old_chunk = block * dev->param.chunks_per_block + dev->gc_chunk;
-+
-+ for (/* init already done */ ;
-+ ret_val == YAFFS_OK &&
-+ dev->gc_chunk < dev->param.chunks_per_block &&
-+ (bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) &&
-+ max_copies > 0;
-+ dev->gc_chunk++, old_chunk++) {
-+ if (yaffs_check_chunk_bit(dev, block, dev->gc_chunk)) {
-+ /* Page is in use and might need to be copied */
-+ max_copies--;
-+ ret_val = yaffs_gc_process_chunk(dev, bi,
-+ old_chunk, buffer);
-+ }
-+ }
-+ yaffs_release_temp_buffer(dev, buffer);
-+ }
-+
-+ yaffs_verify_collected_blk(dev, bi, block);
-+
-+ if (bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) {
-+ /*
-+ * The gc did not complete. Set block state back to FULL
-+ * because checkpointing does not restore gc.
-+ */
-+ bi->block_state = YAFFS_BLOCK_STATE_FULL;
-+ } else {
-+ /* The gc completed. */
-+ /* Do any required cleanups */
-+ for (i = 0; i < dev->n_clean_ups; i++) {
-+ /* Time to delete the file too */
-+ struct yaffs_obj *object =
-+ yaffs_find_by_number(dev, dev->gc_cleanup_list[i]);
-+ if (object) {
-+ yaffs_free_tnode(dev,
-+ object->variant.file_variant.top);
-+ object->variant.file_variant.top = NULL;
-+ yaffs_trace(YAFFS_TRACE_GC,
-+ "yaffs: About to finally delete object %d",
-+ object->obj_id);
-+ yaffs_generic_obj_del(object);
-+ object->my_dev->n_deleted_files--;
-+ }
-+
-+ }
-+ chunks_after = yaffs_get_erased_chunks(dev);
-+ if (chunks_before >= chunks_after)
-+ yaffs_trace(YAFFS_TRACE_GC,
-+ "gc did not increase free chunks before %d after %d",
-+ chunks_before, chunks_after);
-+ dev->gc_block = 0;
-+ dev->gc_chunk = 0;
-+ dev->n_clean_ups = 0;
-+ }
-+
-+ dev->gc_disable = 0;
-+
-+ return ret_val;
-+}
-+
-+/*
-+ * find_gc_block() selects the dirtiest block (or close enough)
-+ * for garbage collection.
-+ */
-+
-+static unsigned yaffs_find_gc_block(struct yaffs_dev *dev,
-+ int aggressive, int background)
-+{
-+ int i;
-+ int iterations;
-+ unsigned selected = 0;
-+ int prioritised = 0;
-+ int prioritised_exist = 0;
-+ struct yaffs_block_info *bi;
-+ int threshold;
-+
-+ /* First let's see if we need to grab a prioritised block */
-+ if (dev->has_pending_prioritised_gc && !aggressive) {
-+ dev->gc_dirtiest = 0;
-+ bi = dev->block_info;
-+ for (i = dev->internal_start_block;
-+ i <= dev->internal_end_block && !selected; i++) {
-+
-+ if (bi->gc_prioritise) {
-+ prioritised_exist = 1;
-+ if (bi->block_state == YAFFS_BLOCK_STATE_FULL &&
-+ yaffs_block_ok_for_gc(dev, bi)) {
-+ selected = i;
-+ prioritised = 1;
-+ }
-+ }
-+ bi++;
-+ }
-+
-+ /*
-+ * If there is a prioritised block and none was selected then
-+ * this happened because there is at least one old dirty block
-+ * gumming up the works. Let's gc the oldest dirty block.
-+ */
-+
-+ if (prioritised_exist &&
-+ !selected && dev->oldest_dirty_block > 0)
-+ selected = dev->oldest_dirty_block;
-+
-+ if (!prioritised_exist) /* None found, so we can clear this */
-+ dev->has_pending_prioritised_gc = 0;
-+ }
-+
-+ /* If we're doing aggressive GC then we are happy to take a less-dirty
-+ * block, and search harder.
-+ * else (leasurely gc), then we only bother to do this if the
-+ * block has only a few pages in use.
-+ */
-+
-+ if (!selected) {
-+ int pages_used;
-+ int n_blocks =
-+ dev->internal_end_block - dev->internal_start_block + 1;
-+ if (aggressive) {
-+ threshold = dev->param.chunks_per_block;
-+ iterations = n_blocks;
-+ } else {
-+ int max_threshold;
-+
-+ if (background)
-+ max_threshold = dev->param.chunks_per_block / 2;
-+ else
-+ max_threshold = dev->param.chunks_per_block / 8;
-+
-+ if (max_threshold < YAFFS_GC_PASSIVE_THRESHOLD)
-+ max_threshold = YAFFS_GC_PASSIVE_THRESHOLD;
-+
-+ threshold = background ? (dev->gc_not_done + 2) * 2 : 0;
-+ if (threshold < YAFFS_GC_PASSIVE_THRESHOLD)
-+ threshold = YAFFS_GC_PASSIVE_THRESHOLD;
-+ if (threshold > max_threshold)
-+ threshold = max_threshold;
-+
-+ iterations = n_blocks / 16 + 1;
-+ if (iterations > 100)
-+ iterations = 100;
-+ }
-+
-+ for (i = 0;
-+ i < iterations &&
-+ (dev->gc_dirtiest < 1 ||
-+ dev->gc_pages_in_use > YAFFS_GC_GOOD_ENOUGH);
-+ i++) {
-+ dev->gc_block_finder++;
-+ if (dev->gc_block_finder < dev->internal_start_block ||
-+ dev->gc_block_finder > dev->internal_end_block)
-+ dev->gc_block_finder =
-+ dev->internal_start_block;
-+
-+ bi = yaffs_get_block_info(dev, dev->gc_block_finder);
-+
-+ pages_used = bi->pages_in_use - bi->soft_del_pages;
-+
-+ if (bi->block_state == YAFFS_BLOCK_STATE_FULL &&
-+ pages_used < dev->param.chunks_per_block &&
-+ (dev->gc_dirtiest < 1 ||
-+ pages_used < dev->gc_pages_in_use) &&
-+ yaffs_block_ok_for_gc(dev, bi)) {
-+ dev->gc_dirtiest = dev->gc_block_finder;
-+ dev->gc_pages_in_use = pages_used;
-+ }
-+ }
-+
-+ if (dev->gc_dirtiest > 0 && dev->gc_pages_in_use <= threshold)
-+ selected = dev->gc_dirtiest;
-+ }
-+
-+ /*
-+ * If nothing has been selected for a while, try the oldest dirty
-+ * because that's gumming up the works.
-+ */
-+
-+ if (!selected && dev->param.is_yaffs2 &&
-+ dev->gc_not_done >= (background ? 10 : 20)) {
-+ yaffs2_find_oldest_dirty_seq(dev);
-+ if (dev->oldest_dirty_block > 0) {
-+ selected = dev->oldest_dirty_block;
-+ dev->gc_dirtiest = selected;
-+ dev->oldest_dirty_gc_count++;
-+ bi = yaffs_get_block_info(dev, selected);
-+ dev->gc_pages_in_use =
-+ bi->pages_in_use - bi->soft_del_pages;
-+ } else {
-+ dev->gc_not_done = 0;
-+ }
-+ }
-+
-+ if (selected) {
-+ yaffs_trace(YAFFS_TRACE_GC,
-+ "GC Selected block %d with %d free, prioritised:%d",
-+ selected,
-+ dev->param.chunks_per_block - dev->gc_pages_in_use,
-+ prioritised);
-+
-+ dev->n_gc_blocks++;
-+ if (background)
-+ dev->bg_gcs++;
-+
-+ dev->gc_dirtiest = 0;
-+ dev->gc_pages_in_use = 0;
-+ dev->gc_not_done = 0;
-+ if (dev->refresh_skip > 0)
-+ dev->refresh_skip--;
-+ } else {
-+ dev->gc_not_done++;
-+ yaffs_trace(YAFFS_TRACE_GC,
-+ "GC none: finder %d skip %d threshold %d dirtiest %d using %d oldest %d%s",
-+ dev->gc_block_finder, dev->gc_not_done, threshold,
-+ dev->gc_dirtiest, dev->gc_pages_in_use,
-+ dev->oldest_dirty_block, background ? " bg" : "");
-+ }
-+
-+ return selected;
-+}
-+
-+/* New garbage collector
-+ * If we're very low on erased blocks then we do aggressive garbage collection
-+ * otherwise we do "leasurely" garbage collection.
-+ * Aggressive gc looks further (whole array) and will accept less dirty blocks.
-+ * Passive gc only inspects smaller areas and only accepts more dirty blocks.
-+ *
-+ * The idea is to help clear out space in a more spread-out manner.
-+ * Dunno if it really does anything useful.
-+ */
-+static int yaffs_check_gc(struct yaffs_dev *dev, int background)
-+{
-+ int aggressive = 0;
-+ int gc_ok = YAFFS_OK;
-+ int max_tries = 0;
-+ int min_erased;
-+ int erased_chunks;
-+ int checkpt_block_adjust;
-+
-+ if (dev->param.gc_control_fn &&
-+ (dev->param.gc_control_fn(dev) & 1) == 0)
-+ return YAFFS_OK;
-+
-+ if (dev->gc_disable)
-+ /* Bail out so we don't get recursive gc */
-+ return YAFFS_OK;
-+
-+ /* This loop should pass the first time.
-+ * Only loops here if the collection does not increase space.
-+ */
-+
-+ do {
-+ max_tries++;
-+
-+ checkpt_block_adjust = yaffs_calc_checkpt_blocks_required(dev);
-+
-+ min_erased =
-+ dev->param.n_reserved_blocks + checkpt_block_adjust + 1;
-+ erased_chunks =
-+ dev->n_erased_blocks * dev->param.chunks_per_block;
-+
-+ /* If we need a block soon then do aggressive gc. */
-+ if (dev->n_erased_blocks < min_erased)
-+ aggressive = 1;
-+ else {
-+ if (!background
-+ && erased_chunks > (dev->n_free_chunks / 4))
-+ break;
-+
-+ if (dev->gc_skip > 20)
-+ dev->gc_skip = 20;
-+ if (erased_chunks < dev->n_free_chunks / 2 ||
-+ dev->gc_skip < 1 || background)
-+ aggressive = 0;
-+ else {
-+ dev->gc_skip--;
-+ break;
-+ }
-+ }
-+
-+ dev->gc_skip = 5;
-+
-+ /* If we don't already have a block being gc'd then see if we
-+ * should start another */
-+
-+ if (dev->gc_block < 1 && !aggressive) {
-+ dev->gc_block = yaffs2_find_refresh_block(dev);
-+ dev->gc_chunk = 0;
-+ dev->n_clean_ups = 0;
-+ }
-+ if (dev->gc_block < 1) {
-+ dev->gc_block =
-+ yaffs_find_gc_block(dev, aggressive, background);
-+ dev->gc_chunk = 0;
-+ dev->n_clean_ups = 0;
-+ }
-+
-+ if (dev->gc_block > 0) {
-+ dev->all_gcs++;
-+ if (!aggressive)
-+ dev->passive_gc_count++;
-+
-+ yaffs_trace(YAFFS_TRACE_GC,
-+ "yaffs: GC n_erased_blocks %d aggressive %d",
-+ dev->n_erased_blocks, aggressive);
-+
-+ gc_ok = yaffs_gc_block(dev, dev->gc_block, aggressive);
-+ }
-+
-+ if (dev->n_erased_blocks < (dev->param.n_reserved_blocks) &&
-+ dev->gc_block > 0) {
-+ yaffs_trace(YAFFS_TRACE_GC,
-+ "yaffs: GC !!!no reclaim!!! n_erased_blocks %d after try %d block %d",
-+ dev->n_erased_blocks, max_tries,
-+ dev->gc_block);
-+ }
-+ } while ((dev->n_erased_blocks < dev->param.n_reserved_blocks) &&
-+ (dev->gc_block > 0) && (max_tries < 2));
-+
-+ return aggressive ? gc_ok : YAFFS_OK;
-+}
-+
-+/*
-+ * yaffs_bg_gc()
-+ * Garbage collects. Intended to be called from a background thread.
-+ * Returns non-zero if at least half the free chunks are erased.
-+ */
-+int yaffs_bg_gc(struct yaffs_dev *dev, unsigned urgency)
-+{
-+ int erased_chunks = dev->n_erased_blocks * dev->param.chunks_per_block;
-+
-+ yaffs_trace(YAFFS_TRACE_BACKGROUND, "Background gc %u", urgency);
-+
-+ yaffs_check_gc(dev, 1);
-+ return erased_chunks > dev->n_free_chunks / 2;
-+}
-+
-+/*-------------------- Data file manipulation -----------------*/
-+
-+static int yaffs_rd_data_obj(struct yaffs_obj *in, int inode_chunk, u8 * buffer)
-+{
-+ int nand_chunk = yaffs_find_chunk_in_file(in, inode_chunk, NULL);
-+
-+ if (nand_chunk >= 0)
-+ return yaffs_rd_chunk_tags_nand(in->my_dev, nand_chunk,
-+ buffer, NULL);
-+ else {
-+ yaffs_trace(YAFFS_TRACE_NANDACCESS,
-+ "Chunk %d not found zero instead",
-+ nand_chunk);
-+ /* get sane (zero) data if you read a hole */
-+ memset(buffer, 0, in->my_dev->data_bytes_per_chunk);
-+ return 0;
-+ }
-+
-+}
-+
-+void yaffs_chunk_del(struct yaffs_dev *dev, int chunk_id, int mark_flash,
-+ int lyn)
-+{
-+ int block;
-+ int page;
-+ struct yaffs_ext_tags tags;
-+ struct yaffs_block_info *bi;
-+
-+ if (chunk_id <= 0)
-+ return;
-+
-+ dev->n_deletions++;
-+ block = chunk_id / dev->param.chunks_per_block;
-+ page = chunk_id % dev->param.chunks_per_block;
-+
-+ if (!yaffs_check_chunk_bit(dev, block, page))
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Deleting invalid chunk %d", chunk_id);
-+
-+ bi = yaffs_get_block_info(dev, block);
-+
-+ yaffs2_update_oldest_dirty_seq(dev, block, bi);
-+
-+ yaffs_trace(YAFFS_TRACE_DELETION,
-+ "line %d delete of chunk %d",
-+ lyn, chunk_id);
-+
-+ if (!dev->param.is_yaffs2 && mark_flash &&
-+ bi->block_state != YAFFS_BLOCK_STATE_COLLECTING) {
-+
-+ memset(&tags, 0, sizeof(tags));
-+ tags.is_deleted = 1;
-+ yaffs_wr_chunk_tags_nand(dev, chunk_id, NULL, &tags);
-+ yaffs_handle_chunk_update(dev, chunk_id, &tags);
-+ } else {
-+ dev->n_unmarked_deletions++;
-+ }
-+
-+ /* Pull out of the management area.
-+ * If the whole block became dirty, this will kick off an erasure.
-+ */
-+ if (bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING ||
-+ bi->block_state == YAFFS_BLOCK_STATE_FULL ||
-+ bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCAN ||
-+ bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) {
-+ dev->n_free_chunks++;
-+ yaffs_clear_chunk_bit(dev, block, page);
-+ bi->pages_in_use--;
-+
-+ if (bi->pages_in_use == 0 &&
-+ !bi->has_shrink_hdr &&
-+ bi->block_state != YAFFS_BLOCK_STATE_ALLOCATING &&
-+ bi->block_state != YAFFS_BLOCK_STATE_NEEDS_SCAN) {
-+ yaffs_block_became_dirty(dev, block);
-+ }
-+ }
-+}
-+
-+static int yaffs_wr_data_obj(struct yaffs_obj *in, int inode_chunk,
-+ const u8 *buffer, int n_bytes, int use_reserve)
-+{
-+ /* Find old chunk Need to do this to get serial number
-+ * Write new one and patch into tree.
-+ * Invalidate old tags.
-+ */
-+
-+ int prev_chunk_id;
-+ struct yaffs_ext_tags prev_tags;
-+ int new_chunk_id;
-+ struct yaffs_ext_tags new_tags;
-+ struct yaffs_dev *dev = in->my_dev;
-+
-+ yaffs_check_gc(dev, 0);
-+
-+ /* Get the previous chunk at this location in the file if it exists.
-+ * If it does not exist then put a zero into the tree. This creates
-+ * the tnode now, rather than later when it is harder to clean up.
-+ */
-+ prev_chunk_id = yaffs_find_chunk_in_file(in, inode_chunk, &prev_tags);
-+ if (prev_chunk_id < 1 &&
-+ !yaffs_put_chunk_in_file(in, inode_chunk, 0, 0))
-+ return 0;
-+
-+ /* Set up new tags */
-+ memset(&new_tags, 0, sizeof(new_tags));
-+
-+ new_tags.chunk_id = inode_chunk;
-+ new_tags.obj_id = in->obj_id;
-+ new_tags.serial_number =
-+ (prev_chunk_id > 0) ? prev_tags.serial_number + 1 : 1;
-+ new_tags.n_bytes = n_bytes;
-+
-+ if (n_bytes < 1 || n_bytes > dev->param.total_bytes_per_chunk) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "Writing %d bytes to chunk!!!!!!!!!",
-+ n_bytes);
-+ BUG();
-+ }
-+
-+ new_chunk_id =
-+ yaffs_write_new_chunk(dev, buffer, &new_tags, use_reserve);
-+
-+ if (new_chunk_id > 0) {
-+ yaffs_put_chunk_in_file(in, inode_chunk, new_chunk_id, 0);
-+
-+ if (prev_chunk_id > 0)
-+ yaffs_chunk_del(dev, prev_chunk_id, 1, __LINE__);
-+
-+ yaffs_verify_file_sane(in);
-+ }
-+ return new_chunk_id;
-+
-+}
-+
-+
-+
-+static int yaffs_do_xattrib_mod(struct yaffs_obj *obj, int set,
-+ const YCHAR *name, const void *value, int size,
-+ int flags)
-+{
-+ struct yaffs_xattr_mod xmod;
-+ int result;
-+
-+ xmod.set = set;
-+ xmod.name = name;
-+ xmod.data = value;
-+ xmod.size = size;
-+ xmod.flags = flags;
-+ xmod.result = -ENOSPC;
-+
-+ result = yaffs_update_oh(obj, NULL, 0, 0, 0, &xmod);
-+
-+ if (result > 0)
-+ return xmod.result;
-+ else
-+ return -ENOSPC;
-+}
-+
-+static int yaffs_apply_xattrib_mod(struct yaffs_obj *obj, char *buffer,
-+ struct yaffs_xattr_mod *xmod)
-+{
-+ int retval = 0;
-+ int x_offs = sizeof(struct yaffs_obj_hdr);
-+ struct yaffs_dev *dev = obj->my_dev;
-+ int x_size = dev->data_bytes_per_chunk - sizeof(struct yaffs_obj_hdr);
-+ char *x_buffer = buffer + x_offs;
-+
-+ if (xmod->set)
-+ retval =
-+ nval_set(x_buffer, x_size, xmod->name, xmod->data,
-+ xmod->size, xmod->flags);
-+ else
-+ retval = nval_del(x_buffer, x_size, xmod->name);
-+
-+ obj->has_xattr = nval_hasvalues(x_buffer, x_size);
-+ obj->xattr_known = 1;
-+ xmod->result = retval;
-+
-+ return retval;
-+}
-+
-+static int yaffs_do_xattrib_fetch(struct yaffs_obj *obj, const YCHAR *name,
-+ void *value, int size)
-+{
-+ char *buffer = NULL;
-+ int result;
-+ struct yaffs_ext_tags tags;
-+ struct yaffs_dev *dev = obj->my_dev;
-+ int x_offs = sizeof(struct yaffs_obj_hdr);
-+ int x_size = dev->data_bytes_per_chunk - sizeof(struct yaffs_obj_hdr);
-+ char *x_buffer;
-+ int retval = 0;
-+
-+ if (obj->hdr_chunk < 1)
-+ return -ENODATA;
-+
-+ /* If we know that the object has no xattribs then don't do all the
-+ * reading and parsing.
-+ */
-+ if (obj->xattr_known && !obj->has_xattr) {
-+ if (name)
-+ return -ENODATA;
-+ else
-+ return 0;
-+ }
-+
-+ buffer = (char *)yaffs_get_temp_buffer(dev);
-+ if (!buffer)
-+ return -ENOMEM;
-+
-+ result =
-+ yaffs_rd_chunk_tags_nand(dev, obj->hdr_chunk, (u8 *) buffer, &tags);
-+
-+ if (result != YAFFS_OK)
-+ retval = -ENOENT;
-+ else {
-+ x_buffer = buffer + x_offs;
-+
-+ if (!obj->xattr_known) {
-+ obj->has_xattr = nval_hasvalues(x_buffer, x_size);
-+ obj->xattr_known = 1;
-+ }
-+
-+ if (name)
-+ retval = nval_get(x_buffer, x_size, name, value, size);
-+ else
-+ retval = nval_list(x_buffer, x_size, value, size);
-+ }
-+ yaffs_release_temp_buffer(dev, (u8 *) buffer);
-+ return retval;
-+}
-+
-+int yaffs_set_xattrib(struct yaffs_obj *obj, const YCHAR * name,
-+ const void *value, int size, int flags)
-+{
-+ return yaffs_do_xattrib_mod(obj, 1, name, value, size, flags);
-+}
-+
-+int yaffs_remove_xattrib(struct yaffs_obj *obj, const YCHAR * name)
-+{
-+ return yaffs_do_xattrib_mod(obj, 0, name, NULL, 0, 0);
-+}
-+
-+int yaffs_get_xattrib(struct yaffs_obj *obj, const YCHAR * name, void *value,
-+ int size)
-+{
-+ return yaffs_do_xattrib_fetch(obj, name, value, size);
-+}
-+
-+int yaffs_list_xattrib(struct yaffs_obj *obj, char *buffer, int size)
-+{
-+ return yaffs_do_xattrib_fetch(obj, NULL, buffer, size);
-+}
-+
-+static void yaffs_check_obj_details_loaded(struct yaffs_obj *in)
-+{
-+ u8 *buf;
-+ struct yaffs_obj_hdr *oh;
-+ struct yaffs_dev *dev;
-+ struct yaffs_ext_tags tags;
-+ int result;
-+ int alloc_failed = 0;
-+
-+ if (!in || !in->lazy_loaded || in->hdr_chunk < 1)
-+ return;
-+
-+ dev = in->my_dev;
-+ in->lazy_loaded = 0;
-+ buf = yaffs_get_temp_buffer(dev);
-+
-+ result = yaffs_rd_chunk_tags_nand(dev, in->hdr_chunk, buf, &tags);
-+ oh = (struct yaffs_obj_hdr *)buf;
-+
-+ in->yst_mode = oh->yst_mode;
-+ yaffs_load_attribs(in, oh);
-+ yaffs_set_obj_name_from_oh(in, oh);
-+
-+ if (in->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) {
-+ in->variant.symlink_variant.alias =
-+ yaffs_clone_str(oh->alias);
-+ if (!in->variant.symlink_variant.alias)
-+ alloc_failed = 1; /* Not returned */
-+ }
-+ yaffs_release_temp_buffer(dev, buf);
-+}
-+
-+/* UpdateObjectHeader updates the header on NAND for an object.
-+ * If name is not NULL, then that new name is used.
-+ */
-+int yaffs_update_oh(struct yaffs_obj *in, const YCHAR *name, int force,
-+ int is_shrink, int shadows, struct yaffs_xattr_mod *xmod)
-+{
-+
-+ struct yaffs_block_info *bi;
-+ struct yaffs_dev *dev = in->my_dev;
-+ int prev_chunk_id;
-+ int ret_val = 0;
-+ int result = 0;
-+ int new_chunk_id;
-+ struct yaffs_ext_tags new_tags;
-+ struct yaffs_ext_tags old_tags;
-+ const YCHAR *alias = NULL;
-+ u8 *buffer = NULL;
-+ YCHAR old_name[YAFFS_MAX_NAME_LENGTH + 1];
-+ struct yaffs_obj_hdr *oh = NULL;
-+ loff_t file_size = 0;
-+
-+ strcpy(old_name, _Y("silly old name"));
-+
-+ if (in->fake && in != dev->root_dir && !force && !xmod)
-+ return ret_val;
-+
-+ yaffs_check_gc(dev, 0);
-+ yaffs_check_obj_details_loaded(in);
-+
-+ buffer = yaffs_get_temp_buffer(in->my_dev);
-+ oh = (struct yaffs_obj_hdr *)buffer;
-+
-+ prev_chunk_id = in->hdr_chunk;
-+
-+ if (prev_chunk_id > 0) {
-+ result = yaffs_rd_chunk_tags_nand(dev, prev_chunk_id,
-+ buffer, &old_tags);
-+
-+ yaffs_verify_oh(in, oh, &old_tags, 0);
-+ memcpy(old_name, oh->name, sizeof(oh->name));
-+ memset(buffer, 0xff, sizeof(struct yaffs_obj_hdr));
-+ } else {
-+ memset(buffer, 0xff, dev->data_bytes_per_chunk);
-+ }
-+
-+ oh->type = in->variant_type;
-+ oh->yst_mode = in->yst_mode;
-+ oh->shadows_obj = oh->inband_shadowed_obj_id = shadows;
-+
-+ yaffs_load_attribs_oh(oh, in);
-+
-+ if (in->parent)
-+ oh->parent_obj_id = in->parent->obj_id;
-+ else
-+ oh->parent_obj_id = 0;
-+
-+ if (name && *name) {
-+ memset(oh->name, 0, sizeof(oh->name));
-+ yaffs_load_oh_from_name(dev, oh->name, name);
-+ } else if (prev_chunk_id > 0) {
-+ memcpy(oh->name, old_name, sizeof(oh->name));
-+ } else {
-+ memset(oh->name, 0, sizeof(oh->name));
-+ }
-+
-+ oh->is_shrink = is_shrink;
-+
-+ switch (in->variant_type) {
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ /* Should not happen */
-+ break;
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ if (oh->parent_obj_id != YAFFS_OBJECTID_DELETED &&
-+ oh->parent_obj_id != YAFFS_OBJECTID_UNLINKED)
-+ file_size = in->variant.file_variant.file_size;
-+ yaffs_oh_size_load(oh, file_size);
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ oh->equiv_id = in->variant.hardlink_variant.equiv_id;
-+ break;
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ /* Do nothing */
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ /* Do nothing */
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ alias = in->variant.symlink_variant.alias;
-+ if (!alias)
-+ alias = _Y("no alias");
-+ strncpy(oh->alias, alias, YAFFS_MAX_ALIAS_LENGTH);
-+ oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0;
-+ break;
-+ }
-+
-+ /* process any xattrib modifications */
-+ if (xmod)
-+ yaffs_apply_xattrib_mod(in, (char *)buffer, xmod);
-+
-+ /* Tags */
-+ memset(&new_tags, 0, sizeof(new_tags));
-+ in->serial++;
-+ new_tags.chunk_id = 0;
-+ new_tags.obj_id = in->obj_id;
-+ new_tags.serial_number = in->serial;
-+
-+ /* Add extra info for file header */
-+ new_tags.extra_available = 1;
-+ new_tags.extra_parent_id = oh->parent_obj_id;
-+ new_tags.extra_file_size = file_size;
-+ new_tags.extra_is_shrink = oh->is_shrink;
-+ new_tags.extra_equiv_id = oh->equiv_id;
-+ new_tags.extra_shadows = (oh->shadows_obj > 0) ? 1 : 0;
-+ new_tags.extra_obj_type = in->variant_type;
-+ yaffs_verify_oh(in, oh, &new_tags, 1);
-+
-+ /* Create new chunk in NAND */
-+ new_chunk_id =
-+ yaffs_write_new_chunk(dev, buffer, &new_tags,
-+ (prev_chunk_id > 0) ? 1 : 0);
-+
-+ if (buffer)
-+ yaffs_release_temp_buffer(dev, buffer);
-+
-+ if (new_chunk_id < 0)
-+ return new_chunk_id;
-+
-+ in->hdr_chunk = new_chunk_id;
-+
-+ if (prev_chunk_id > 0)
-+ yaffs_chunk_del(dev, prev_chunk_id, 1, __LINE__);
-+
-+ if (!yaffs_obj_cache_dirty(in))
-+ in->dirty = 0;
-+
-+ /* If this was a shrink, then mark the block
-+ * that the chunk lives on */
-+ if (is_shrink) {
-+ bi = yaffs_get_block_info(in->my_dev,
-+ new_chunk_id /
-+ in->my_dev->param.chunks_per_block);
-+ bi->has_shrink_hdr = 1;
-+ }
-+
-+
-+ return new_chunk_id;
-+}
-+
-+/*--------------------- File read/write ------------------------
-+ * Read and write have very similar structures.
-+ * In general the read/write has three parts to it
-+ * An incomplete chunk to start with (if the read/write is not chunk-aligned)
-+ * Some complete chunks
-+ * An incomplete chunk to end off with
-+ *
-+ * Curve-balls: the first chunk might also be the last chunk.
-+ */
-+
-+int yaffs_file_rd(struct yaffs_obj *in, u8 * buffer, loff_t offset, int n_bytes)
-+{
-+ int chunk;
-+ u32 start;
-+ int n_copy;
-+ int n = n_bytes;
-+ int n_done = 0;
-+ struct yaffs_cache *cache;
-+ struct yaffs_dev *dev;
-+
-+ dev = in->my_dev;
-+
-+ while (n > 0) {
-+ yaffs_addr_to_chunk(dev, offset, &chunk, &start);
-+ chunk++;
-+
-+ /* OK now check for the curveball where the start and end are in
-+ * the same chunk.
-+ */
-+ if ((start + n) < dev->data_bytes_per_chunk)
-+ n_copy = n;
-+ else
-+ n_copy = dev->data_bytes_per_chunk - start;
-+
-+ cache = yaffs_find_chunk_cache(in, chunk);
-+
-+ /* If the chunk is already in the cache or it is less than
-+ * a whole chunk or we're using inband tags then use the cache
-+ * (if there is caching) else bypass the cache.
-+ */
-+ if (cache || n_copy != dev->data_bytes_per_chunk ||
-+ dev->param.inband_tags) {
-+ if (dev->param.n_caches > 0) {
-+
-+ /* If we can't find the data in the cache,
-+ * then load it up. */
-+
-+ if (!cache) {
-+ cache =
-+ yaffs_grab_chunk_cache(in->my_dev);
-+ cache->object = in;
-+ cache->chunk_id = chunk;
-+ cache->dirty = 0;
-+ cache->locked = 0;
-+ yaffs_rd_data_obj(in, chunk,
-+ cache->data);
-+ cache->n_bytes = 0;
-+ }
-+
-+ yaffs_use_cache(dev, cache, 0);
-+
-+ cache->locked = 1;
-+
-+ memcpy(buffer, &cache->data[start], n_copy);
-+
-+ cache->locked = 0;
-+ } else {
-+ /* Read into the local buffer then copy.. */
-+
-+ u8 *local_buffer =
-+ yaffs_get_temp_buffer(dev);
-+ yaffs_rd_data_obj(in, chunk, local_buffer);
-+
-+ memcpy(buffer, &local_buffer[start], n_copy);
-+
-+ yaffs_release_temp_buffer(dev, local_buffer);
-+ }
-+ } else {
-+ /* A full chunk. Read directly into the buffer. */
-+ yaffs_rd_data_obj(in, chunk, buffer);
-+ }
-+ n -= n_copy;
-+ offset += n_copy;
-+ buffer += n_copy;
-+ n_done += n_copy;
-+ }
-+ return n_done;
-+}
-+
-+int yaffs_do_file_wr(struct yaffs_obj *in, const u8 *buffer, loff_t offset,
-+ int n_bytes, int write_through)
-+{
-+
-+ int chunk;
-+ u32 start;
-+ int n_copy;
-+ int n = n_bytes;
-+ int n_done = 0;
-+ int n_writeback;
-+ loff_t start_write = offset;
-+ int chunk_written = 0;
-+ u32 n_bytes_read;
-+ loff_t chunk_start;
-+ struct yaffs_dev *dev;
-+
-+ dev = in->my_dev;
-+
-+ while (n > 0 && chunk_written >= 0) {
-+ yaffs_addr_to_chunk(dev, offset, &chunk, &start);
-+
-+ if (((loff_t)chunk) *
-+ dev->data_bytes_per_chunk + start != offset ||
-+ start >= dev->data_bytes_per_chunk) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "AddrToChunk of offset %lld gives chunk %d start %d",
-+ offset, chunk, start);
-+ }
-+ chunk++; /* File pos to chunk in file offset */
-+
-+ /* OK now check for the curveball where the start and end are in
-+ * the same chunk.
-+ */
-+
-+ if ((start + n) < dev->data_bytes_per_chunk) {
-+ n_copy = n;
-+
-+ /* Now calculate how many bytes to write back....
-+ * If we're overwriting and not writing to then end of
-+ * file then we need to write back as much as was there
-+ * before.
-+ */
-+
-+ chunk_start = (((loff_t)(chunk - 1)) *
-+ dev->data_bytes_per_chunk);
-+
-+ if (chunk_start > in->variant.file_variant.file_size)
-+ n_bytes_read = 0; /* Past end of file */
-+ else
-+ n_bytes_read =
-+ in->variant.file_variant.file_size -
-+ chunk_start;
-+
-+ if (n_bytes_read > dev->data_bytes_per_chunk)
-+ n_bytes_read = dev->data_bytes_per_chunk;
-+
-+ n_writeback =
-+ (n_bytes_read >
-+ (start + n)) ? n_bytes_read : (start + n);
-+
-+ if (n_writeback < 0 ||
-+ n_writeback > dev->data_bytes_per_chunk)
-+ BUG();
-+
-+ } else {
-+ n_copy = dev->data_bytes_per_chunk - start;
-+ n_writeback = dev->data_bytes_per_chunk;
-+ }
-+
-+ if (n_copy != dev->data_bytes_per_chunk ||
-+ !dev->param.cache_bypass_aligned ||
-+ dev->param.inband_tags) {
-+ /* An incomplete start or end chunk (or maybe both
-+ * start and end chunk), or we're using inband tags,
-+ * or we're forcing writes through the cache,
-+ * so we want to use the cache buffers.
-+ */
-+ if (dev->param.n_caches > 0) {
-+ struct yaffs_cache *cache;
-+
-+ /* If we can't find the data in the cache, then
-+ * load the cache */
-+ cache = yaffs_find_chunk_cache(in, chunk);
-+
-+ if (!cache &&
-+ yaffs_check_alloc_available(dev, 1)) {
-+ cache = yaffs_grab_chunk_cache(dev);
-+ cache->object = in;
-+ cache->chunk_id = chunk;
-+ cache->dirty = 0;
-+ cache->locked = 0;
-+ yaffs_rd_data_obj(in, chunk,
-+ cache->data);
-+ } else if (cache &&
-+ !cache->dirty &&
-+ !yaffs_check_alloc_available(dev,
-+ 1)) {
-+ /* Drop the cache if it was a read cache
-+ * item and no space check has been made
-+ * for it.
-+ */
-+ cache = NULL;
-+ }
-+
-+ if (cache) {
-+ yaffs_use_cache(dev, cache, 1);
-+ cache->locked = 1;
-+
-+ memcpy(&cache->data[start], buffer,
-+ n_copy);
-+
-+ cache->locked = 0;
-+ cache->n_bytes = n_writeback;
-+
-+ if (write_through) {
-+ chunk_written =
-+ yaffs_wr_data_obj
-+ (cache->object,
-+ cache->chunk_id,
-+ cache->data,
-+ cache->n_bytes, 1);
-+ cache->dirty = 0;
-+ }
-+ } else {
-+ chunk_written = -1; /* fail write */
-+ }
-+ } else {
-+ /* An incomplete start or end chunk (or maybe
-+ * both start and end chunk). Read into the
-+ * local buffer then copy over and write back.
-+ */
-+
-+ u8 *local_buffer = yaffs_get_temp_buffer(dev);
-+
-+ yaffs_rd_data_obj(in, chunk, local_buffer);
-+ memcpy(&local_buffer[start], buffer, n_copy);
-+
-+ chunk_written =
-+ yaffs_wr_data_obj(in, chunk,
-+ local_buffer,
-+ n_writeback, 0);
-+
-+ yaffs_release_temp_buffer(dev, local_buffer);
-+ }
-+ } else {
-+ /* A full chunk. Write directly from the buffer. */
-+
-+ chunk_written =
-+ yaffs_wr_data_obj(in, chunk, buffer,
-+ dev->data_bytes_per_chunk, 0);
-+
-+ /* Since we've overwritten the cached data,
-+ * we better invalidate it. */
-+ yaffs_invalidate_chunk_cache(in, chunk);
-+ }
-+
-+ if (chunk_written >= 0) {
-+ n -= n_copy;
-+ offset += n_copy;
-+ buffer += n_copy;
-+ n_done += n_copy;
-+ }
-+ }
-+
-+ /* Update file object */
-+
-+ if ((start_write + n_done) > in->variant.file_variant.file_size)
-+ in->variant.file_variant.file_size = (start_write + n_done);
-+
-+ in->dirty = 1;
-+ return n_done;
-+}
-+
-+int yaffs_wr_file(struct yaffs_obj *in, const u8 *buffer, loff_t offset,
-+ int n_bytes, int write_through)
-+{
-+ yaffs2_handle_hole(in, offset);
-+ return yaffs_do_file_wr(in, buffer, offset, n_bytes, write_through);
-+}
-+
-+/* ---------------------- File resizing stuff ------------------ */
-+
-+static void yaffs_prune_chunks(struct yaffs_obj *in, loff_t new_size)
-+{
-+
-+ struct yaffs_dev *dev = in->my_dev;
-+ loff_t old_size = in->variant.file_variant.file_size;
-+ int i;
-+ int chunk_id;
-+ u32 dummy;
-+ int last_del;
-+ int start_del;
-+
-+ if (old_size > 0)
-+ yaffs_addr_to_chunk(dev, old_size - 1, &last_del, &dummy);
-+ else
-+ last_del = 0;
-+
-+ yaffs_addr_to_chunk(dev, new_size + dev->data_bytes_per_chunk - 1,
-+ &start_del, &dummy);
-+ last_del++;
-+ start_del++;
-+
-+ /* Delete backwards so that we don't end up with holes if
-+ * power is lost part-way through the operation.
-+ */
-+ for (i = last_del; i >= start_del; i--) {
-+ /* NB this could be optimised somewhat,
-+ * eg. could retrieve the tags and write them without
-+ * using yaffs_chunk_del
-+ */
-+
-+ chunk_id = yaffs_find_del_file_chunk(in, i, NULL);
-+
-+ if (chunk_id < 1)
-+ continue;
-+
-+ if (chunk_id <
-+ (dev->internal_start_block * dev->param.chunks_per_block) ||
-+ chunk_id >=
-+ ((dev->internal_end_block + 1) *
-+ dev->param.chunks_per_block)) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "Found daft chunk_id %d for %d",
-+ chunk_id, i);
-+ } else {
-+ in->n_data_chunks--;
-+ yaffs_chunk_del(dev, chunk_id, 1, __LINE__);
-+ }
-+ }
-+}
-+
-+void yaffs_resize_file_down(struct yaffs_obj *obj, loff_t new_size)
-+{
-+ int new_full;
-+ u32 new_partial;
-+ struct yaffs_dev *dev = obj->my_dev;
-+
-+ yaffs_addr_to_chunk(dev, new_size, &new_full, &new_partial);
-+
-+ yaffs_prune_chunks(obj, new_size);
-+
-+ if (new_partial != 0) {
-+ int last_chunk = 1 + new_full;
-+ u8 *local_buffer = yaffs_get_temp_buffer(dev);
-+
-+ /* Rewrite the last chunk with its new size and zero pad */
-+ yaffs_rd_data_obj(obj, last_chunk, local_buffer);
-+ memset(local_buffer + new_partial, 0,
-+ dev->data_bytes_per_chunk - new_partial);
-+
-+ yaffs_wr_data_obj(obj, last_chunk, local_buffer,
-+ new_partial, 1);
-+
-+ yaffs_release_temp_buffer(dev, local_buffer);
-+ }
-+
-+ obj->variant.file_variant.file_size = new_size;
-+
-+ yaffs_prune_tree(dev, &obj->variant.file_variant);
-+}
-+
-+int yaffs_resize_file(struct yaffs_obj *in, loff_t new_size)
-+{
-+ struct yaffs_dev *dev = in->my_dev;
-+ loff_t old_size = in->variant.file_variant.file_size;
-+
-+ yaffs_flush_file_cache(in, 1);
-+ yaffs_invalidate_whole_cache(in);
-+
-+ yaffs_check_gc(dev, 0);
-+
-+ if (in->variant_type != YAFFS_OBJECT_TYPE_FILE)
-+ return YAFFS_FAIL;
-+
-+ if (new_size == old_size)
-+ return YAFFS_OK;
-+
-+ if (new_size > old_size) {
-+ yaffs2_handle_hole(in, new_size);
-+ in->variant.file_variant.file_size = new_size;
-+ } else {
-+ /* new_size < old_size */
-+ yaffs_resize_file_down(in, new_size);
-+ }
-+
-+ /* Write a new object header to reflect the resize.
-+ * show we've shrunk the file, if need be
-+ * Do this only if the file is not in the deleted directories
-+ * and is not shadowed.
-+ */
-+ if (in->parent &&
-+ !in->is_shadowed &&
-+ in->parent->obj_id != YAFFS_OBJECTID_UNLINKED &&
-+ in->parent->obj_id != YAFFS_OBJECTID_DELETED)
-+ yaffs_update_oh(in, NULL, 0, 0, 0, NULL);
-+
-+ return YAFFS_OK;
-+}
-+
-+int yaffs_flush_file(struct yaffs_obj *in,
-+ int update_time,
-+ int data_sync,
-+ int discard_cache)
-+{
-+ if (!in->dirty)
-+ return YAFFS_OK;
-+
-+ yaffs_flush_file_cache(in, discard_cache);
-+
-+ if (data_sync)
-+ return YAFFS_OK;
-+
-+ if (update_time)
-+ yaffs_load_current_time(in, 0, 0);
-+
-+ return (yaffs_update_oh(in, NULL, 0, 0, 0, NULL) >= 0) ?
-+ YAFFS_OK : YAFFS_FAIL;
-+}
-+
-+
-+/* yaffs_del_file deletes the whole file data
-+ * and the inode associated with the file.
-+ * It does not delete the links associated with the file.
-+ */
-+static int yaffs_unlink_file_if_needed(struct yaffs_obj *in)
-+{
-+ int ret_val;
-+ int del_now = 0;
-+ struct yaffs_dev *dev = in->my_dev;
-+
-+ if (!in->my_inode)
-+ del_now = 1;
-+
-+ if (del_now) {
-+ ret_val =
-+ yaffs_change_obj_name(in, in->my_dev->del_dir,
-+ _Y("deleted"), 0, 0);
-+ yaffs_trace(YAFFS_TRACE_TRACING,
-+ "yaffs: immediate deletion of file %d",
-+ in->obj_id);
-+ in->deleted = 1;
-+ in->my_dev->n_deleted_files++;
-+ if (dev->param.disable_soft_del || dev->param.is_yaffs2)
-+ yaffs_resize_file(in, 0);
-+ yaffs_soft_del_file(in);
-+ } else {
-+ ret_val =
-+ yaffs_change_obj_name(in, in->my_dev->unlinked_dir,
-+ _Y("unlinked"), 0, 0);
-+ }
-+ return ret_val;
-+}
-+
-+static int yaffs_del_file(struct yaffs_obj *in)
-+{
-+ int ret_val = YAFFS_OK;
-+ int deleted; /* Need to cache value on stack if in is freed */
-+ struct yaffs_dev *dev = in->my_dev;
-+
-+ if (dev->param.disable_soft_del || dev->param.is_yaffs2)
-+ yaffs_resize_file(in, 0);
-+
-+ if (in->n_data_chunks > 0) {
-+ /* Use soft deletion if there is data in the file.
-+ * That won't be the case if it has been resized to zero.
-+ */
-+ if (!in->unlinked)
-+ ret_val = yaffs_unlink_file_if_needed(in);
-+
-+ deleted = in->deleted;
-+
-+ if (ret_val == YAFFS_OK && in->unlinked && !in->deleted) {
-+ in->deleted = 1;
-+ deleted = 1;
-+ in->my_dev->n_deleted_files++;
-+ yaffs_soft_del_file(in);
-+ }
-+ return deleted ? YAFFS_OK : YAFFS_FAIL;
-+ } else {
-+ /* The file has no data chunks so we toss it immediately */
-+ yaffs_free_tnode(in->my_dev, in->variant.file_variant.top);
-+ in->variant.file_variant.top = NULL;
-+ yaffs_generic_obj_del(in);
-+
-+ return YAFFS_OK;
-+ }
-+}
-+
-+int yaffs_is_non_empty_dir(struct yaffs_obj *obj)
-+{
-+ return (obj &&
-+ obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) &&
-+ !(list_empty(&obj->variant.dir_variant.children));
-+}
-+
-+static int yaffs_del_dir(struct yaffs_obj *obj)
-+{
-+ /* First check that the directory is empty. */
-+ if (yaffs_is_non_empty_dir(obj))
-+ return YAFFS_FAIL;
-+
-+ return yaffs_generic_obj_del(obj);
-+}
-+
-+static int yaffs_del_symlink(struct yaffs_obj *in)
-+{
-+ kfree(in->variant.symlink_variant.alias);
-+ in->variant.symlink_variant.alias = NULL;
-+
-+ return yaffs_generic_obj_del(in);
-+}
-+
-+static int yaffs_del_link(struct yaffs_obj *in)
-+{
-+ /* remove this hardlink from the list associated with the equivalent
-+ * object
-+ */
-+ list_del_init(&in->hard_links);
-+ return yaffs_generic_obj_del(in);
-+}
-+
-+int yaffs_del_obj(struct yaffs_obj *obj)
-+{
-+ int ret_val = -1;
-+
-+ switch (obj->variant_type) {
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ ret_val = yaffs_del_file(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ if (!list_empty(&obj->variant.dir_variant.dirty)) {
-+ yaffs_trace(YAFFS_TRACE_BACKGROUND,
-+ "Remove object %d from dirty directories",
-+ obj->obj_id);
-+ list_del_init(&obj->variant.dir_variant.dirty);
-+ }
-+ return yaffs_del_dir(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ ret_val = yaffs_del_symlink(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ ret_val = yaffs_del_link(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ ret_val = yaffs_generic_obj_del(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ ret_val = 0;
-+ break; /* should not happen. */
-+ }
-+ return ret_val;
-+}
-+
-+
-+static void yaffs_empty_dir_to_dir(struct yaffs_obj *from_dir,
-+ struct yaffs_obj *to_dir)
-+{
-+ struct yaffs_obj *obj;
-+ struct list_head *lh;
-+ struct list_head *n;
-+
-+ list_for_each_safe(lh, n, &from_dir->variant.dir_variant.children) {
-+ obj = list_entry(lh, struct yaffs_obj, siblings);
-+ yaffs_add_obj_to_dir(to_dir, obj);
-+ }
-+}
-+
-+struct yaffs_obj *yaffs_retype_obj(struct yaffs_obj *obj,
-+ enum yaffs_obj_type type)
-+{
-+ /* Tear down the old variant */
-+ switch (obj->variant_type) {
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ /* Nuke file data */
-+ yaffs_resize_file(obj, 0);
-+ yaffs_free_tnode(obj->my_dev, obj->variant.file_variant.top);
-+ obj->variant.file_variant.top = NULL;
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ /* Put the children in lost and found. */
-+ yaffs_empty_dir_to_dir(obj, obj->my_dev->lost_n_found);
-+ if (!list_empty(&obj->variant.dir_variant.dirty))
-+ list_del_init(&obj->variant.dir_variant.dirty);
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ /* Nuke symplink data */
-+ kfree(obj->variant.symlink_variant.alias);
-+ obj->variant.symlink_variant.alias = NULL;
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ list_del_init(&obj->hard_links);
-+ break;
-+ default:
-+ break;
-+ }
-+
-+ memset(&obj->variant, 0, sizeof(obj->variant));
-+
-+ /*Set up new variant if the memset is not enough. */
-+ switch (type) {
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ INIT_LIST_HEAD(&obj->variant.dir_variant.children);
-+ INIT_LIST_HEAD(&obj->variant.dir_variant.dirty);
-+ break;
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ default:
-+ break;
-+ }
-+
-+ obj->variant_type = type;
-+
-+ return obj;
-+
-+}
-+
-+static int yaffs_unlink_worker(struct yaffs_obj *obj)
-+{
-+ int del_now = 0;
-+
-+ if (!obj)
-+ return YAFFS_FAIL;
-+
-+ if (!obj->my_inode)
-+ del_now = 1;
-+
-+ yaffs_update_parent(obj->parent);
-+
-+ if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) {
-+ return yaffs_del_link(obj);
-+ } else if (!list_empty(&obj->hard_links)) {
-+ /* Curve ball: We're unlinking an object that has a hardlink.
-+ *
-+ * This problem arises because we are not strictly following
-+ * The Linux link/inode model.
-+ *
-+ * We can't really delete the object.
-+ * Instead, we do the following:
-+ * - Select a hardlink.
-+ * - Unhook it from the hard links
-+ * - Move it from its parent directory so that the rename works.
-+ * - Rename the object to the hardlink's name.
-+ * - Delete the hardlink
-+ */
-+
-+ struct yaffs_obj *hl;
-+ struct yaffs_obj *parent;
-+ int ret_val;
-+ YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
-+
-+ hl = list_entry(obj->hard_links.next, struct yaffs_obj,
-+ hard_links);
-+
-+ yaffs_get_obj_name(hl, name, YAFFS_MAX_NAME_LENGTH + 1);
-+ parent = hl->parent;
-+
-+ list_del_init(&hl->hard_links);
-+
-+ yaffs_add_obj_to_dir(obj->my_dev->unlinked_dir, hl);
-+
-+ ret_val = yaffs_change_obj_name(obj, parent, name, 0, 0);
-+
-+ if (ret_val == YAFFS_OK)
-+ ret_val = yaffs_generic_obj_del(hl);
-+
-+ return ret_val;
-+
-+ } else if (del_now) {
-+ switch (obj->variant_type) {
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ return yaffs_del_file(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ list_del_init(&obj->variant.dir_variant.dirty);
-+ return yaffs_del_dir(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ return yaffs_del_symlink(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ return yaffs_generic_obj_del(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ default:
-+ return YAFFS_FAIL;
-+ }
-+ } else if (yaffs_is_non_empty_dir(obj)) {
-+ return YAFFS_FAIL;
-+ } else {
-+ return yaffs_change_obj_name(obj, obj->my_dev->unlinked_dir,
-+ _Y("unlinked"), 0, 0);
-+ }
-+}
-+
-+static int yaffs_unlink_obj(struct yaffs_obj *obj)
-+{
-+ if (obj && obj->unlink_allowed)
-+ return yaffs_unlink_worker(obj);
-+
-+ return YAFFS_FAIL;
-+}
-+
-+int yaffs_unlinker(struct yaffs_obj *dir, const YCHAR *name)
-+{
-+ struct yaffs_obj *obj;
-+
-+ obj = yaffs_find_by_name(dir, name);
-+ return yaffs_unlink_obj(obj);
-+}
-+
-+/* Note:
-+ * If old_name is NULL then we take old_dir as the object to be renamed.
-+ */
-+int yaffs_rename_obj(struct yaffs_obj *old_dir, const YCHAR *old_name,
-+ struct yaffs_obj *new_dir, const YCHAR *new_name)
-+{
-+ struct yaffs_obj *obj = NULL;
-+ struct yaffs_obj *existing_target = NULL;
-+ int force = 0;
-+ int result;
-+ struct yaffs_dev *dev;
-+
-+ if (!old_dir || old_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ BUG();
-+ return YAFFS_FAIL;
-+ }
-+ if (!new_dir || new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ BUG();
-+ return YAFFS_FAIL;
-+ }
-+
-+ dev = old_dir->my_dev;
-+
-+#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
-+ /* Special case for case insemsitive systems.
-+ * While look-up is case insensitive, the name isn't.
-+ * Therefore we might want to change x.txt to X.txt
-+ */
-+ if (old_dir == new_dir &&
-+ old_name && new_name &&
-+ strcmp(old_name, new_name) == 0)
-+ force = 1;
-+#endif
-+
-+ if (strnlen(new_name, YAFFS_MAX_NAME_LENGTH + 1) >
-+ YAFFS_MAX_NAME_LENGTH)
-+ /* ENAMETOOLONG */
-+ return YAFFS_FAIL;
-+
-+ if (old_name)
-+ obj = yaffs_find_by_name(old_dir, old_name);
-+ else{
-+ obj = old_dir;
-+ old_dir = obj->parent;
-+ }
-+
-+ if (obj && obj->rename_allowed) {
-+ /* Now handle an existing target, if there is one */
-+ existing_target = yaffs_find_by_name(new_dir, new_name);
-+ if (yaffs_is_non_empty_dir(existing_target)) {
-+ return YAFFS_FAIL; /* ENOTEMPTY */
-+ } else if (existing_target && existing_target != obj) {
-+ /* Nuke the target first, using shadowing,
-+ * but only if it isn't the same object.
-+ *
-+ * Note we must disable gc here otherwise it can mess
-+ * up the shadowing.
-+ *
-+ */
-+ dev->gc_disable = 1;
-+ yaffs_change_obj_name(obj, new_dir, new_name, force,
-+ existing_target->obj_id);
-+ existing_target->is_shadowed = 1;
-+ yaffs_unlink_obj(existing_target);
-+ dev->gc_disable = 0;
-+ }
-+
-+ result = yaffs_change_obj_name(obj, new_dir, new_name, 1, 0);
-+
-+ yaffs_update_parent(old_dir);
-+ if (new_dir != old_dir)
-+ yaffs_update_parent(new_dir);
-+
-+ return result;
-+ }
-+ return YAFFS_FAIL;
-+}
-+
-+/*----------------------- Initialisation Scanning ---------------------- */
-+
-+void yaffs_handle_shadowed_obj(struct yaffs_dev *dev, int obj_id,
-+ int backward_scanning)
-+{
-+ struct yaffs_obj *obj;
-+
-+ if (backward_scanning) {
-+ /* Handle YAFFS2 case (backward scanning)
-+ * If the shadowed object exists then ignore.
-+ */
-+ obj = yaffs_find_by_number(dev, obj_id);
-+ if (obj)
-+ return;
-+ }
-+
-+ /* Let's create it (if it does not exist) assuming it is a file so that
-+ * it can do shrinking etc.
-+ * We put it in unlinked dir to be cleaned up after the scanning
-+ */
-+ obj =
-+ yaffs_find_or_create_by_number(dev, obj_id, YAFFS_OBJECT_TYPE_FILE);
-+ if (!obj)
-+ return;
-+ obj->is_shadowed = 1;
-+ yaffs_add_obj_to_dir(dev->unlinked_dir, obj);
-+ obj->variant.file_variant.shrink_size = 0;
-+ obj->valid = 1; /* So that we don't read any other info. */
-+}
-+
-+void yaffs_link_fixup(struct yaffs_dev *dev, struct list_head *hard_list)
-+{
-+ struct list_head *lh;
-+ struct list_head *save;
-+ struct yaffs_obj *hl;
-+ struct yaffs_obj *in;
-+
-+ list_for_each_safe(lh, save, hard_list) {
-+ hl = list_entry(lh, struct yaffs_obj, hard_links);
-+ in = yaffs_find_by_number(dev,
-+ hl->variant.hardlink_variant.equiv_id);
-+
-+ if (in) {
-+ /* Add the hardlink pointers */
-+ hl->variant.hardlink_variant.equiv_obj = in;
-+ list_add(&hl->hard_links, &in->hard_links);
-+ } else {
-+ /* Todo Need to report/handle this better.
-+ * Got a problem... hardlink to a non-existant object
-+ */
-+ hl->variant.hardlink_variant.equiv_obj = NULL;
-+ INIT_LIST_HEAD(&hl->hard_links);
-+ }
-+ }
-+}
-+
-+static void yaffs_strip_deleted_objs(struct yaffs_dev *dev)
-+{
-+ /*
-+ * Sort out state of unlinked and deleted objects after scanning.
-+ */
-+ struct list_head *i;
-+ struct list_head *n;
-+ struct yaffs_obj *l;
-+
-+ if (dev->read_only)
-+ return;
-+
-+ /* Soft delete all the unlinked files */
-+ list_for_each_safe(i, n,
-+ &dev->unlinked_dir->variant.dir_variant.children) {
-+ l = list_entry(i, struct yaffs_obj, siblings);
-+ yaffs_del_obj(l);
-+ }
-+
-+ list_for_each_safe(i, n, &dev->del_dir->variant.dir_variant.children) {
-+ l = list_entry(i, struct yaffs_obj, siblings);
-+ yaffs_del_obj(l);
-+ }
-+}
-+
-+/*
-+ * This code iterates through all the objects making sure that they are rooted.
-+ * Any unrooted objects are re-rooted in lost+found.
-+ * An object needs to be in one of:
-+ * - Directly under deleted, unlinked
-+ * - Directly or indirectly under root.
-+ *
-+ * Note:
-+ * This code assumes that we don't ever change the current relationships
-+ * between directories:
-+ * root_dir->parent == unlinked_dir->parent == del_dir->parent == NULL
-+ * lost-n-found->parent == root_dir
-+ *
-+ * This fixes the problem where directories might have inadvertently been
-+ * deleted leaving the object "hanging" without being rooted in the
-+ * directory tree.
-+ */
-+
-+static int yaffs_has_null_parent(struct yaffs_dev *dev, struct yaffs_obj *obj)
-+{
-+ return (obj == dev->del_dir ||
-+ obj == dev->unlinked_dir || obj == dev->root_dir);
-+}
-+
-+static void yaffs_fix_hanging_objs(struct yaffs_dev *dev)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_obj *parent;
-+ int i;
-+ struct list_head *lh;
-+ struct list_head *n;
-+ int depth_limit;
-+ int hanging;
-+
-+ if (dev->read_only)
-+ return;
-+
-+ /* Iterate through the objects in each hash entry,
-+ * looking at each object.
-+ * Make sure it is rooted.
-+ */
-+
-+ for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
-+ list_for_each_safe(lh, n, &dev->obj_bucket[i].list) {
-+ obj = list_entry(lh, struct yaffs_obj, hash_link);
-+ parent = obj->parent;
-+
-+ if (yaffs_has_null_parent(dev, obj)) {
-+ /* These directories are not hanging */
-+ hanging = 0;
-+ } else if (!parent ||
-+ parent->variant_type !=
-+ YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ hanging = 1;
-+ } else if (yaffs_has_null_parent(dev, parent)) {
-+ hanging = 0;
-+ } else {
-+ /*
-+ * Need to follow the parent chain to
-+ * see if it is hanging.
-+ */
-+ hanging = 0;
-+ depth_limit = 100;
-+
-+ while (parent != dev->root_dir &&
-+ parent->parent &&
-+ parent->parent->variant_type ==
-+ YAFFS_OBJECT_TYPE_DIRECTORY &&
-+ depth_limit > 0) {
-+ parent = parent->parent;
-+ depth_limit--;
-+ }
-+ if (parent != dev->root_dir)
-+ hanging = 1;
-+ }
-+ if (hanging) {
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ "Hanging object %d moved to lost and found",
-+ obj->obj_id);
-+ yaffs_add_obj_to_dir(dev->lost_n_found, obj);
-+ }
-+ }
-+ }
-+}
-+
-+/*
-+ * Delete directory contents for cleaning up lost and found.
-+ */
-+static void yaffs_del_dir_contents(struct yaffs_obj *dir)
-+{
-+ struct yaffs_obj *obj;
-+ struct list_head *lh;
-+ struct list_head *n;
-+
-+ if (dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
-+ BUG();
-+
-+ list_for_each_safe(lh, n, &dir->variant.dir_variant.children) {
-+ obj = list_entry(lh, struct yaffs_obj, siblings);
-+ if (obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY)
-+ yaffs_del_dir_contents(obj);
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ "Deleting lost_found object %d",
-+ obj->obj_id);
-+ yaffs_unlink_obj(obj);
-+ }
-+}
-+
-+static void yaffs_empty_l_n_f(struct yaffs_dev *dev)
-+{
-+ yaffs_del_dir_contents(dev->lost_n_found);
-+}
-+
-+
-+struct yaffs_obj *yaffs_find_by_name(struct yaffs_obj *directory,
-+ const YCHAR *name)
-+{
-+ int sum;
-+ struct list_head *i;
-+ YCHAR buffer[YAFFS_MAX_NAME_LENGTH + 1];
-+ struct yaffs_obj *l;
-+
-+ if (!name)
-+ return NULL;
-+
-+ if (!directory) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "tragedy: yaffs_find_by_name: null pointer directory"
-+ );
-+ BUG();
-+ return NULL;
-+ }
-+ if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "tragedy: yaffs_find_by_name: non-directory"
-+ );
-+ BUG();
-+ }
-+
-+ sum = yaffs_calc_name_sum(name);
-+
-+ list_for_each(i, &directory->variant.dir_variant.children) {
-+ l = list_entry(i, struct yaffs_obj, siblings);
-+
-+ if (l->parent != directory)
-+ BUG();
-+
-+ yaffs_check_obj_details_loaded(l);
-+
-+ /* Special case for lost-n-found */
-+ if (l->obj_id == YAFFS_OBJECTID_LOSTNFOUND) {
-+ if (!strcmp(name, YAFFS_LOSTNFOUND_NAME))
-+ return l;
-+ } else if (l->sum == sum || l->hdr_chunk <= 0) {
-+ /* LostnFound chunk called Objxxx
-+ * Do a real check
-+ */
-+ yaffs_get_obj_name(l, buffer,
-+ YAFFS_MAX_NAME_LENGTH + 1);
-+ if (!strncmp(name, buffer, YAFFS_MAX_NAME_LENGTH))
-+ return l;
-+ }
-+ }
-+ return NULL;
-+}
-+
-+/* GetEquivalentObject dereferences any hard links to get to the
-+ * actual object.
-+ */
-+
-+struct yaffs_obj *yaffs_get_equivalent_obj(struct yaffs_obj *obj)
-+{
-+ if (obj && obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) {
-+ obj = obj->variant.hardlink_variant.equiv_obj;
-+ yaffs_check_obj_details_loaded(obj);
-+ }
-+ return obj;
-+}
-+
-+/*
-+ * A note or two on object names.
-+ * * If the object name is missing, we then make one up in the form objnnn
-+ *
-+ * * ASCII names are stored in the object header's name field from byte zero
-+ * * Unicode names are historically stored starting from byte zero.
-+ *
-+ * Then there are automatic Unicode names...
-+ * The purpose of these is to save names in a way that can be read as
-+ * ASCII or Unicode names as appropriate, thus allowing a Unicode and ASCII
-+ * system to share files.
-+ *
-+ * These automatic unicode are stored slightly differently...
-+ * - If the name can fit in the ASCII character space then they are saved as
-+ * ascii names as per above.
-+ * - If the name needs Unicode then the name is saved in Unicode
-+ * starting at oh->name[1].
-+
-+ */
-+static void yaffs_fix_null_name(struct yaffs_obj *obj, YCHAR *name,
-+ int buffer_size)
-+{
-+ /* Create an object name if we could not find one. */
-+ if (strnlen(name, YAFFS_MAX_NAME_LENGTH) == 0) {
-+ YCHAR local_name[20];
-+ YCHAR num_string[20];
-+ YCHAR *x = &num_string[19];
-+ unsigned v = obj->obj_id;
-+ num_string[19] = 0;
-+ while (v > 0) {
-+ x--;
-+ *x = '0' + (v % 10);
-+ v /= 10;
-+ }
-+ /* make up a name */
-+ strcpy(local_name, YAFFS_LOSTNFOUND_PREFIX);
-+ strcat(local_name, x);
-+ strncpy(name, local_name, buffer_size - 1);
-+ }
-+}
-+
-+int yaffs_get_obj_name(struct yaffs_obj *obj, YCHAR *name, int buffer_size)
-+{
-+ memset(name, 0, buffer_size * sizeof(YCHAR));
-+ yaffs_check_obj_details_loaded(obj);
-+ if (obj->obj_id == YAFFS_OBJECTID_LOSTNFOUND) {
-+ strncpy(name, YAFFS_LOSTNFOUND_NAME, buffer_size - 1);
-+ } else if (obj->short_name[0]) {
-+ strcpy(name, obj->short_name);
-+ } else if (obj->hdr_chunk > 0) {
-+ int result;
-+ u8 *buffer = yaffs_get_temp_buffer(obj->my_dev);
-+
-+ struct yaffs_obj_hdr *oh = (struct yaffs_obj_hdr *)buffer;
-+
-+ memset(buffer, 0, obj->my_dev->data_bytes_per_chunk);
-+
-+ if (obj->hdr_chunk > 0) {
-+ result = yaffs_rd_chunk_tags_nand(obj->my_dev,
-+ obj->hdr_chunk,
-+ buffer, NULL);
-+ }
-+ yaffs_load_name_from_oh(obj->my_dev, name, oh->name,
-+ buffer_size);
-+
-+ yaffs_release_temp_buffer(obj->my_dev, buffer);
-+ }
-+
-+ yaffs_fix_null_name(obj, name, buffer_size);
-+
-+ return strnlen(name, YAFFS_MAX_NAME_LENGTH);
-+}
-+
-+loff_t yaffs_get_obj_length(struct yaffs_obj *obj)
-+{
-+ /* Dereference any hard linking */
-+ obj = yaffs_get_equivalent_obj(obj);
-+
-+ if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE)
-+ return obj->variant.file_variant.file_size;
-+ if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) {
-+ if (!obj->variant.symlink_variant.alias)
-+ return 0;
-+ return strnlen(obj->variant.symlink_variant.alias,
-+ YAFFS_MAX_ALIAS_LENGTH);
-+ } else {
-+ /* Only a directory should drop through to here */
-+ return obj->my_dev->data_bytes_per_chunk;
-+ }
-+}
-+
-+int yaffs_get_obj_link_count(struct yaffs_obj *obj)
-+{
-+ int count = 0;
-+ struct list_head *i;
-+
-+ if (!obj->unlinked)
-+ count++; /* the object itself */
-+
-+ list_for_each(i, &obj->hard_links)
-+ count++; /* add the hard links; */
-+
-+ return count;
-+}
-+
-+int yaffs_get_obj_inode(struct yaffs_obj *obj)
-+{
-+ obj = yaffs_get_equivalent_obj(obj);
-+
-+ return obj->obj_id;
-+}
-+
-+unsigned yaffs_get_obj_type(struct yaffs_obj *obj)
-+{
-+ obj = yaffs_get_equivalent_obj(obj);
-+
-+ switch (obj->variant_type) {
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ return DT_REG;
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ return DT_DIR;
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ return DT_LNK;
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ return DT_REG;
-+ break;
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ if (S_ISFIFO(obj->yst_mode))
-+ return DT_FIFO;
-+ if (S_ISCHR(obj->yst_mode))
-+ return DT_CHR;
-+ if (S_ISBLK(obj->yst_mode))
-+ return DT_BLK;
-+ if (S_ISSOCK(obj->yst_mode))
-+ return DT_SOCK;
-+ return DT_REG;
-+ break;
-+ default:
-+ return DT_REG;
-+ break;
-+ }
-+}
-+
-+YCHAR *yaffs_get_symlink_alias(struct yaffs_obj *obj)
-+{
-+ obj = yaffs_get_equivalent_obj(obj);
-+ if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK)
-+ return yaffs_clone_str(obj->variant.symlink_variant.alias);
-+ else
-+ return yaffs_clone_str(_Y(""));
-+}
-+
-+/*--------------------------- Initialisation code -------------------------- */
-+
-+static int yaffs_check_dev_fns(struct yaffs_dev *dev)
-+{
-+ struct yaffs_driver *drv = &dev->drv;
-+ struct yaffs_tags_handler *tagger = &dev->tagger;
-+
-+ /* Common functions, gotta have */
-+ if (!drv->drv_read_chunk_fn ||
-+ !drv->drv_write_chunk_fn ||
-+ !drv->drv_erase_fn)
-+ return 0;
-+
-+ if (dev->param.is_yaffs2 &&
-+ (!drv->drv_mark_bad_fn || !drv->drv_check_bad_fn))
-+ return 0;
-+
-+ /* Install the default tags marshalling functions if needed. */
-+ yaffs_tags_compat_install(dev);
-+ yaffs_tags_marshall_install(dev);
-+
-+ /* Check we now have the marshalling functions required. */
-+ if (!tagger->write_chunk_tags_fn ||
-+ !tagger->read_chunk_tags_fn ||
-+ !tagger->query_block_fn ||
-+ !tagger->mark_bad_fn)
-+ return 0;
-+
-+ return 1;
-+}
-+
-+static int yaffs_create_initial_dir(struct yaffs_dev *dev)
-+{
-+ /* Initialise the unlinked, deleted, root and lost+found directories */
-+ dev->lost_n_found = dev->root_dir = NULL;
-+ dev->unlinked_dir = dev->del_dir = NULL;
-+ dev->unlinked_dir =
-+ yaffs_create_fake_dir(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR);
-+ dev->del_dir =
-+ yaffs_create_fake_dir(dev, YAFFS_OBJECTID_DELETED, S_IFDIR);
-+ dev->root_dir =
-+ yaffs_create_fake_dir(dev, YAFFS_OBJECTID_ROOT,
-+ YAFFS_ROOT_MODE | S_IFDIR);
-+ dev->lost_n_found =
-+ yaffs_create_fake_dir(dev, YAFFS_OBJECTID_LOSTNFOUND,
-+ YAFFS_LOSTNFOUND_MODE | S_IFDIR);
-+
-+ if (dev->lost_n_found && dev->root_dir && dev->unlinked_dir
-+ && dev->del_dir) {
-+ yaffs_add_obj_to_dir(dev->root_dir, dev->lost_n_found);
-+ return YAFFS_OK;
-+ }
-+ return YAFFS_FAIL;
-+}
-+
-+/* Low level init.
-+ * Typically only used by yaffs_guts_initialise, but also used by the
-+ * Low level yaffs driver tests.
-+ */
-+
-+int yaffs_guts_ll_init(struct yaffs_dev *dev)
-+{
-+
-+
-+ yaffs_trace(YAFFS_TRACE_TRACING, "yaffs: yaffs_ll_init()");
-+
-+ if (!dev) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs: Need a device"
-+ );
-+ return YAFFS_FAIL;
-+ }
-+
-+ if (dev->ll_init)
-+ return YAFFS_OK;
-+
-+ dev->internal_start_block = dev->param.start_block;
-+ dev->internal_end_block = dev->param.end_block;
-+ dev->block_offset = 0;
-+ dev->chunk_offset = 0;
-+ dev->n_free_chunks = 0;
-+
-+ dev->gc_block = 0;
-+
-+ if (dev->param.start_block == 0) {
-+ dev->internal_start_block = dev->param.start_block + 1;
-+ dev->internal_end_block = dev->param.end_block + 1;
-+ dev->block_offset = 1;
-+ dev->chunk_offset = dev->param.chunks_per_block;
-+ }
-+
-+ /* Check geometry parameters. */
-+
-+ if ((!dev->param.inband_tags && dev->param.is_yaffs2 &&
-+ dev->param.total_bytes_per_chunk < 1024) ||
-+ (!dev->param.is_yaffs2 &&
-+ dev->param.total_bytes_per_chunk < 512) ||
-+ (dev->param.inband_tags && !dev->param.is_yaffs2) ||
-+ dev->param.chunks_per_block < 2 ||
-+ dev->param.n_reserved_blocks < 2 ||
-+ dev->internal_start_block <= 0 ||
-+ dev->internal_end_block <= 0 ||
-+ dev->internal_end_block <=
-+ (dev->internal_start_block + dev->param.n_reserved_blocks + 2)
-+ ) {
-+ /* otherwise it is too small */
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "NAND geometry problems: chunk size %d, type is yaffs%s, inband_tags %d ",
-+ dev->param.total_bytes_per_chunk,
-+ dev->param.is_yaffs2 ? "2" : "",
-+ dev->param.inband_tags);
-+ return YAFFS_FAIL;
-+ }
-+
-+ /* Sort out space for inband tags, if required */
-+ if (dev->param.inband_tags)
-+ dev->data_bytes_per_chunk =
-+ dev->param.total_bytes_per_chunk -
-+ sizeof(struct yaffs_packed_tags2_tags_only);
-+ else
-+ dev->data_bytes_per_chunk = dev->param.total_bytes_per_chunk;
-+
-+ /* Got the right mix of functions? */
-+ if (!yaffs_check_dev_fns(dev)) {
-+ /* Function missing */
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "device function(s) missing or wrong");
-+
-+ return YAFFS_FAIL;
-+ }
-+
-+ if (yaffs_init_nand(dev) != YAFFS_OK) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "InitialiseNAND failed");
-+ return YAFFS_FAIL;
-+ }
-+
-+ return YAFFS_OK;
-+}
-+
-+
-+int yaffs_guts_format_dev(struct yaffs_dev *dev)
-+{
-+ int i;
-+ enum yaffs_block_state state;
-+ u32 dummy;
-+
-+ if(yaffs_guts_ll_init(dev) != YAFFS_OK)
-+ return YAFFS_FAIL;
-+
-+ if(dev->is_mounted)
-+ return YAFFS_FAIL;
-+
-+ for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
-+ yaffs_query_init_block_state(dev, i, &state, &dummy);
-+ if (state != YAFFS_BLOCK_STATE_DEAD)
-+ yaffs_erase_block(dev, i);
-+ }
-+
-+ return YAFFS_OK;
-+}
-+
-+
-+int yaffs_guts_initialise(struct yaffs_dev *dev)
-+{
-+ int init_failed = 0;
-+ unsigned x;
-+ int bits;
-+
-+ if(yaffs_guts_ll_init(dev) != YAFFS_OK)
-+ return YAFFS_FAIL;
-+
-+ if (dev->is_mounted) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "device already mounted");
-+ return YAFFS_FAIL;
-+ }
-+
-+ dev->is_mounted = 1;
-+
-+ /* OK now calculate a few things for the device */
-+
-+ /*
-+ * Calculate all the chunk size manipulation numbers:
-+ */
-+ x = dev->data_bytes_per_chunk;
-+ /* We always use dev->chunk_shift and dev->chunk_div */
-+ dev->chunk_shift = calc_shifts(x);
-+ x >>= dev->chunk_shift;
-+ dev->chunk_div = x;
-+ /* We only use chunk mask if chunk_div is 1 */
-+ dev->chunk_mask = (1 << dev->chunk_shift) - 1;
-+
-+ /*
-+ * Calculate chunk_grp_bits.
-+ * We need to find the next power of 2 > than internal_end_block
-+ */
-+
-+ x = dev->param.chunks_per_block * (dev->internal_end_block + 1);
-+
-+ bits = calc_shifts_ceiling(x);
-+
-+ /* Set up tnode width if wide tnodes are enabled. */
-+ if (!dev->param.wide_tnodes_disabled) {
-+ /* bits must be even so that we end up with 32-bit words */
-+ if (bits & 1)
-+ bits++;
-+ if (bits < 16)
-+ dev->tnode_width = 16;
-+ else
-+ dev->tnode_width = bits;
-+ } else {
-+ dev->tnode_width = 16;
-+ }
-+
-+ dev->tnode_mask = (1 << dev->tnode_width) - 1;
-+
-+ /* Level0 Tnodes are 16 bits or wider (if wide tnodes are enabled),
-+ * so if the bitwidth of the
-+ * chunk range we're using is greater than 16 we need
-+ * to figure out chunk shift and chunk_grp_size
-+ */
-+
-+ if (bits <= dev->tnode_width)
-+ dev->chunk_grp_bits = 0;
-+ else
-+ dev->chunk_grp_bits = bits - dev->tnode_width;
-+
-+ dev->tnode_size = (dev->tnode_width * YAFFS_NTNODES_LEVEL0) / 8;
-+ if (dev->tnode_size < sizeof(struct yaffs_tnode))
-+ dev->tnode_size = sizeof(struct yaffs_tnode);
-+
-+ dev->chunk_grp_size = 1 << dev->chunk_grp_bits;
-+
-+ if (dev->param.chunks_per_block < dev->chunk_grp_size) {
-+ /* We have a problem because the soft delete won't work if
-+ * the chunk group size > chunks per block.
-+ * This can be remedied by using larger "virtual blocks".
-+ */
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "chunk group too large");
-+
-+ return YAFFS_FAIL;
-+ }
-+
-+ /* Finished verifying the device, continue with initialisation */
-+
-+ /* More device initialisation */
-+ dev->all_gcs = 0;
-+ dev->passive_gc_count = 0;
-+ dev->oldest_dirty_gc_count = 0;
-+ dev->bg_gcs = 0;
-+ dev->gc_block_finder = 0;
-+ dev->buffered_block = -1;
-+ dev->doing_buffered_block_rewrite = 0;
-+ dev->n_deleted_files = 0;
-+ dev->n_bg_deletions = 0;
-+ dev->n_unlinked_files = 0;
-+ dev->n_ecc_fixed = 0;
-+ dev->n_ecc_unfixed = 0;
-+ dev->n_tags_ecc_fixed = 0;
-+ dev->n_tags_ecc_unfixed = 0;
-+ dev->n_erase_failures = 0;
-+ dev->n_erased_blocks = 0;
-+ dev->gc_disable = 0;
-+ dev->has_pending_prioritised_gc = 1;
-+ /* Assume the worst for now, will get fixed on first GC */
-+ INIT_LIST_HEAD(&dev->dirty_dirs);
-+ dev->oldest_dirty_seq = 0;
-+ dev->oldest_dirty_block = 0;
-+
-+ /* Initialise temporary buffers and caches. */
-+ if (!yaffs_init_tmp_buffers(dev))
-+ init_failed = 1;
-+
-+ dev->cache = NULL;
-+ dev->gc_cleanup_list = NULL;
-+
-+ if (!init_failed && dev->param.n_caches > 0) {
-+ int i;
-+ void *buf;
-+ int cache_bytes =
-+ dev->param.n_caches * sizeof(struct yaffs_cache);
-+
-+ if (dev->param.n_caches > YAFFS_MAX_SHORT_OP_CACHES)
-+ dev->param.n_caches = YAFFS_MAX_SHORT_OP_CACHES;
-+
-+ dev->cache = kmalloc(cache_bytes, GFP_NOFS);
-+
-+ buf = (u8 *) dev->cache;
-+
-+ if (dev->cache)
-+ memset(dev->cache, 0, cache_bytes);
-+
-+ for (i = 0; i < dev->param.n_caches && buf; i++) {
-+ dev->cache[i].object = NULL;
-+ dev->cache[i].last_use = 0;
-+ dev->cache[i].dirty = 0;
-+ dev->cache[i].data = buf =
-+ kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS);
-+ }
-+ if (!buf)
-+ init_failed = 1;
-+
-+ dev->cache_last_use = 0;
-+ }
-+
-+ dev->cache_hits = 0;
-+
-+ if (!init_failed) {
-+ dev->gc_cleanup_list =
-+ kmalloc(dev->param.chunks_per_block * sizeof(u32),
-+ GFP_NOFS);
-+ if (!dev->gc_cleanup_list)
-+ init_failed = 1;
-+ }
-+
-+ if (dev->param.is_yaffs2)
-+ dev->param.use_header_file_size = 1;
-+
-+ if (!init_failed && !yaffs_init_blocks(dev))
-+ init_failed = 1;
-+
-+ yaffs_init_tnodes_and_objs(dev);
-+
-+ if (!init_failed && !yaffs_create_initial_dir(dev))
-+ init_failed = 1;
-+
-+ if (!init_failed && dev->param.is_yaffs2 &&
-+ !dev->param.disable_summary &&
-+ !yaffs_summary_init(dev))
-+ init_failed = 1;
-+
-+ if (!init_failed) {
-+ /* Now scan the flash. */
-+ if (dev->param.is_yaffs2) {
-+ if (yaffs2_checkpt_restore(dev)) {
-+ yaffs_check_obj_details_loaded(dev->root_dir);
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT |
-+ YAFFS_TRACE_MOUNT,
-+ "yaffs: restored from checkpoint"
-+ );
-+ } else {
-+
-+ /* Clean up the mess caused by an aborted
-+ * checkpoint load then scan backwards.
-+ */
-+ yaffs_deinit_blocks(dev);
-+
-+ yaffs_deinit_tnodes_and_objs(dev);
-+
-+ dev->n_erased_blocks = 0;
-+ dev->n_free_chunks = 0;
-+ dev->alloc_block = -1;
-+ dev->alloc_page = -1;
-+ dev->n_deleted_files = 0;
-+ dev->n_unlinked_files = 0;
-+ dev->n_bg_deletions = 0;
-+
-+ if (!init_failed && !yaffs_init_blocks(dev))
-+ init_failed = 1;
-+
-+ yaffs_init_tnodes_and_objs(dev);
-+
-+ if (!init_failed
-+ && !yaffs_create_initial_dir(dev))
-+ init_failed = 1;
-+
-+ if (!init_failed && !yaffs2_scan_backwards(dev))
-+ init_failed = 1;
-+ }
-+ } else if (!yaffs1_scan(dev)) {
-+ init_failed = 1;
-+ }
-+
-+ yaffs_strip_deleted_objs(dev);
-+ yaffs_fix_hanging_objs(dev);
-+ if (dev->param.empty_lost_n_found)
-+ yaffs_empty_l_n_f(dev);
-+ }
-+
-+ if (init_failed) {
-+ /* Clean up the mess */
-+ yaffs_trace(YAFFS_TRACE_TRACING,
-+ "yaffs: yaffs_guts_initialise() aborted.");
-+
-+ yaffs_deinitialise(dev);
-+ return YAFFS_FAIL;
-+ }
-+
-+ /* Zero out stats */
-+ dev->n_page_reads = 0;
-+ dev->n_page_writes = 0;
-+ dev->n_erasures = 0;
-+ dev->n_gc_copies = 0;
-+ dev->n_retried_writes = 0;
-+
-+ dev->n_retired_blocks = 0;
-+
-+ yaffs_verify_free_chunks(dev);
-+ yaffs_verify_blocks(dev);
-+
-+ /* Clean up any aborted checkpoint data */
-+ if (!dev->is_checkpointed && dev->blocks_in_checkpt > 0)
-+ yaffs2_checkpt_invalidate(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_TRACING,
-+ "yaffs: yaffs_guts_initialise() done.");
-+ return YAFFS_OK;
-+}
-+
-+void yaffs_deinitialise(struct yaffs_dev *dev)
-+{
-+ if (dev->is_mounted) {
-+ int i;
-+
-+ yaffs_deinit_blocks(dev);
-+ yaffs_deinit_tnodes_and_objs(dev);
-+ yaffs_summary_deinit(dev);
-+
-+ if (dev->param.n_caches > 0 && dev->cache) {
-+
-+ for (i = 0; i < dev->param.n_caches; i++) {
-+ kfree(dev->cache[i].data);
-+ dev->cache[i].data = NULL;
-+ }
-+
-+ kfree(dev->cache);
-+ dev->cache = NULL;
-+ }
-+
-+ kfree(dev->gc_cleanup_list);
-+
-+ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
-+ kfree(dev->temp_buffer[i].buffer);
-+ dev->temp_buffer[i].buffer = NULL;
-+ }
-+
-+ kfree(dev->checkpt_buffer);
-+ dev->checkpt_buffer = NULL;
-+ kfree(dev->checkpt_block_list);
-+ dev->checkpt_block_list = NULL;
-+
-+ dev->is_mounted = 0;
-+
-+ yaffs_deinit_nand(dev);
-+ }
-+}
-+
-+int yaffs_count_free_chunks(struct yaffs_dev *dev)
-+{
-+ int n_free = 0;
-+ int b;
-+ struct yaffs_block_info *blk;
-+
-+ blk = dev->block_info;
-+ for (b = dev->internal_start_block; b <= dev->internal_end_block; b++) {
-+ switch (blk->block_state) {
-+ case YAFFS_BLOCK_STATE_EMPTY:
-+ case YAFFS_BLOCK_STATE_ALLOCATING:
-+ case YAFFS_BLOCK_STATE_COLLECTING:
-+ case YAFFS_BLOCK_STATE_FULL:
-+ n_free +=
-+ (dev->param.chunks_per_block - blk->pages_in_use +
-+ blk->soft_del_pages);
-+ break;
-+ default:
-+ break;
-+ }
-+ blk++;
-+ }
-+ return n_free;
-+}
-+
-+int yaffs_get_n_free_chunks(struct yaffs_dev *dev)
-+{
-+ /* This is what we report to the outside world */
-+ int n_free;
-+ int n_dirty_caches;
-+ int blocks_for_checkpt;
-+ int i;
-+
-+ n_free = dev->n_free_chunks;
-+ n_free += dev->n_deleted_files;
-+
-+ /* Now count and subtract the number of dirty chunks in the cache. */
-+
-+ for (n_dirty_caches = 0, i = 0; i < dev->param.n_caches; i++) {
-+ if (dev->cache[i].dirty)
-+ n_dirty_caches++;
-+ }
-+
-+ n_free -= n_dirty_caches;
-+
-+ n_free -=
-+ ((dev->param.n_reserved_blocks + 1) * dev->param.chunks_per_block);
-+
-+ /* Now figure checkpoint space and report that... */
-+ blocks_for_checkpt = yaffs_calc_checkpt_blocks_required(dev);
-+
-+ n_free -= (blocks_for_checkpt * dev->param.chunks_per_block);
-+
-+ if (n_free < 0)
-+ n_free = 0;
-+
-+ return n_free;
-+}
-+
-+
-+
-+/*
-+ * Marshalling functions to get loff_t file sizes into and out of
-+ * object headers.
-+ */
-+void yaffs_oh_size_load(struct yaffs_obj_hdr *oh, loff_t fsize)
-+{
-+ oh->file_size_low = (fsize & 0xFFFFFFFF);
-+ oh->file_size_high = ((fsize >> 32) & 0xFFFFFFFF);
-+}
-+
-+loff_t yaffs_oh_to_size(struct yaffs_obj_hdr *oh)
-+{
-+ loff_t retval;
-+
-+ if (sizeof(loff_t) >= 8 && ~(oh->file_size_high))
-+ retval = (((loff_t) oh->file_size_high) << 32) |
-+ (((loff_t) oh->file_size_low) & 0xFFFFFFFF);
-+ else
-+ retval = (loff_t) oh->file_size_low;
-+
-+ return retval;
-+}
-+
-+
-+void yaffs_count_blocks_by_state(struct yaffs_dev *dev, int bs[10])
-+{
-+ int i;
-+ struct yaffs_block_info *bi;
-+ int s;
-+
-+ for(i = 0; i < 10; i++)
-+ bs[i] = 0;
-+
-+ for(i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
-+ bi = yaffs_get_block_info(dev, i);
-+ s = bi->block_state;
-+ if(s > YAFFS_BLOCK_STATE_DEAD || s < YAFFS_BLOCK_STATE_UNKNOWN)
-+ bs[0]++;
-+ else
-+ bs[s]++;
-+ }
-+}
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_guts.h linux-3.18.14/fs/yaffs2/yaffs_guts.h
---- linux-3.18.14.orig/fs/yaffs2/yaffs_guts.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_guts.h 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,1010 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_GUTS_H__
-+#define __YAFFS_GUTS_H__
-+
-+#include "yportenv.h"
-+
-+#define YAFFS_OK 1
-+#define YAFFS_FAIL 0
-+
-+/* Give us a Y=0x59,
-+ * Give us an A=0x41,
-+ * Give us an FF=0xff
-+ * Give us an S=0x53
-+ * And what have we got...
-+ */
-+#define YAFFS_MAGIC 0x5941ff53
-+
-+/*
-+ * Tnodes form a tree with the tnodes in "levels"
-+ * Levels greater than 0 hold 8 slots which point to other tnodes.
-+ * Those at level 0 hold 16 slots which point to chunks in NAND.
-+ *
-+ * A maximum level of 8 thust supports files of size up to:
-+ *
-+ * 2^(3*MAX_LEVEL+4)
-+ *
-+ * Thus a max level of 8 supports files with up to 2^^28 chunks which gives
-+ * a maximum file size of around 512Gbytees with 2k chunks.
-+ */
-+#define YAFFS_NTNODES_LEVEL0 16
-+#define YAFFS_TNODES_LEVEL0_BITS 4
-+#define YAFFS_TNODES_LEVEL0_MASK 0xf
-+
-+#define YAFFS_NTNODES_INTERNAL (YAFFS_NTNODES_LEVEL0 / 2)
-+#define YAFFS_TNODES_INTERNAL_BITS (YAFFS_TNODES_LEVEL0_BITS - 1)
-+#define YAFFS_TNODES_INTERNAL_MASK 0x7
-+#define YAFFS_TNODES_MAX_LEVEL 8
-+#define YAFFS_TNODES_MAX_BITS (YAFFS_TNODES_LEVEL0_BITS + \
-+ YAFFS_TNODES_INTERNAL_BITS * \
-+ YAFFS_TNODES_MAX_LEVEL)
-+#define YAFFS_MAX_CHUNK_ID ((1 << YAFFS_TNODES_MAX_BITS) - 1)
-+
-+#define YAFFS_MAX_FILE_SIZE_32 0x7fffffff
-+
-+/* Constants for YAFFS1 mode */
-+#define YAFFS_BYTES_PER_SPARE 16
-+#define YAFFS_BYTES_PER_CHUNK 512
-+#define YAFFS_CHUNK_SIZE_SHIFT 9
-+#define YAFFS_CHUNKS_PER_BLOCK 32
-+#define YAFFS_BYTES_PER_BLOCK (YAFFS_CHUNKS_PER_BLOCK*YAFFS_BYTES_PER_CHUNK)
-+
-+#define YAFFS_MIN_YAFFS2_CHUNK_SIZE 1024
-+#define YAFFS_MIN_YAFFS2_SPARE_SIZE 32
-+
-+
-+
-+#define YAFFS_ALLOCATION_NOBJECTS 100
-+#define YAFFS_ALLOCATION_NTNODES 100
-+#define YAFFS_ALLOCATION_NLINKS 100
-+
-+#define YAFFS_NOBJECT_BUCKETS 256
-+
-+#define YAFFS_OBJECT_SPACE 0x40000
-+#define YAFFS_MAX_OBJECT_ID (YAFFS_OBJECT_SPACE - 1)
-+
-+/* Binary data version stamps */
-+#define YAFFS_SUMMARY_VERSION 1
-+#define YAFFS_CHECKPOINT_VERSION 7
-+
-+#ifdef CONFIG_YAFFS_UNICODE
-+#define YAFFS_MAX_NAME_LENGTH 127
-+#define YAFFS_MAX_ALIAS_LENGTH 79
-+#else
-+#define YAFFS_MAX_NAME_LENGTH 255
-+#define YAFFS_MAX_ALIAS_LENGTH 159
-+#endif
-+
-+#define YAFFS_SHORT_NAME_LENGTH 15
-+
-+/* Some special object ids for pseudo objects */
-+#define YAFFS_OBJECTID_ROOT 1
-+#define YAFFS_OBJECTID_LOSTNFOUND 2
-+#define YAFFS_OBJECTID_UNLINKED 3
-+#define YAFFS_OBJECTID_DELETED 4
-+
-+/* Fake object Id for summary data */
-+#define YAFFS_OBJECTID_SUMMARY 0x10
-+
-+/* Pseudo object ids for checkpointing */
-+#define YAFFS_OBJECTID_CHECKPOINT_DATA 0x20
-+#define YAFFS_SEQUENCE_CHECKPOINT_DATA 0x21
-+
-+#define YAFFS_MAX_SHORT_OP_CACHES 20
-+
-+#define YAFFS_N_TEMP_BUFFERS 6
-+
-+/* We limit the number attempts at sucessfully saving a chunk of data.
-+ * Small-page devices have 32 pages per block; large-page devices have 64.
-+ * Default to something in the order of 5 to 10 blocks worth of chunks.
-+ */
-+#define YAFFS_WR_ATTEMPTS (5*64)
-+
-+/* Sequence numbers are used in YAFFS2 to determine block allocation order.
-+ * The range is limited slightly to help distinguish bad numbers from good.
-+ * This also allows us to perhaps in the future use special numbers for
-+ * special purposes.
-+ * EFFFFF00 allows the allocation of 8 blocks/second (~1Mbytes) for 15 years,
-+ * and is a larger number than the lifetime of a 2GB device.
-+ */
-+#define YAFFS_LOWEST_SEQUENCE_NUMBER 0x00001000
-+#define YAFFS_HIGHEST_SEQUENCE_NUMBER 0xefffff00
-+
-+/* Special sequence number for bad block that failed to be marked bad */
-+#define YAFFS_SEQUENCE_BAD_BLOCK 0xffff0000
-+
-+/* ChunkCache is used for short read/write operations.*/
-+struct yaffs_cache {
-+ struct yaffs_obj *object;
-+ int chunk_id;
-+ int last_use;
-+ int dirty;
-+ int n_bytes; /* Only valid if the cache is dirty */
-+ int locked; /* Can't push out or flush while locked. */
-+ u8 *data;
-+};
-+
-+/* yaffs1 tags structures in RAM
-+ * NB This uses bitfield. Bitfields should not straddle a u32 boundary
-+ * otherwise the structure size will get blown out.
-+ */
-+
-+struct yaffs_tags {
-+ u32 chunk_id:20;
-+ u32 serial_number:2;
-+ u32 n_bytes_lsb:10;
-+ u32 obj_id:18;
-+ u32 ecc:12;
-+ u32 n_bytes_msb:2;
-+};
-+
-+union yaffs_tags_union {
-+ struct yaffs_tags as_tags;
-+ u8 as_bytes[8];
-+};
-+
-+
-+/* Stuff used for extended tags in YAFFS2 */
-+
-+enum yaffs_ecc_result {
-+ YAFFS_ECC_RESULT_UNKNOWN,
-+ YAFFS_ECC_RESULT_NO_ERROR,
-+ YAFFS_ECC_RESULT_FIXED,
-+ YAFFS_ECC_RESULT_UNFIXED
-+};
-+
-+enum yaffs_obj_type {
-+ YAFFS_OBJECT_TYPE_UNKNOWN,
-+ YAFFS_OBJECT_TYPE_FILE,
-+ YAFFS_OBJECT_TYPE_SYMLINK,
-+ YAFFS_OBJECT_TYPE_DIRECTORY,
-+ YAFFS_OBJECT_TYPE_HARDLINK,
-+ YAFFS_OBJECT_TYPE_SPECIAL
-+};
-+
-+#define YAFFS_OBJECT_TYPE_MAX YAFFS_OBJECT_TYPE_SPECIAL
-+
-+struct yaffs_ext_tags {
-+ unsigned chunk_used; /* Status of the chunk: used or unused */
-+ unsigned obj_id; /* If 0 this is not used */
-+ unsigned chunk_id; /* If 0 this is a header, else a data chunk */
-+ unsigned n_bytes; /* Only valid for data chunks */
-+
-+ /* The following stuff only has meaning when we read */
-+ enum yaffs_ecc_result ecc_result;
-+ unsigned block_bad;
-+
-+ /* YAFFS 1 stuff */
-+ unsigned is_deleted; /* The chunk is marked deleted */
-+ unsigned serial_number; /* Yaffs1 2-bit serial number */
-+
-+ /* YAFFS2 stuff */
-+ unsigned seq_number; /* The sequence number of this block */
-+
-+ /* Extra info if this is an object header (YAFFS2 only) */
-+
-+ unsigned extra_available; /* Extra info available if not zero */
-+ unsigned extra_parent_id; /* The parent object */
-+ unsigned extra_is_shrink; /* Is it a shrink header? */
-+ unsigned extra_shadows; /* Does this shadow another object? */
-+
-+ enum yaffs_obj_type extra_obj_type; /* What object type? */
-+
-+ loff_t extra_file_size; /* Length if it is a file */
-+ unsigned extra_equiv_id; /* Equivalent object for a hard link */
-+};
-+
-+/* Spare structure for YAFFS1 */
-+struct yaffs_spare {
-+ u8 tb0;
-+ u8 tb1;
-+ u8 tb2;
-+ u8 tb3;
-+ u8 page_status; /* set to 0 to delete the chunk */
-+ u8 block_status;
-+ u8 tb4;
-+ u8 tb5;
-+ u8 ecc1[3];
-+ u8 tb6;
-+ u8 tb7;
-+ u8 ecc2[3];
-+};
-+
-+/*Special structure for passing through to mtd */
-+struct yaffs_nand_spare {
-+ struct yaffs_spare spare;
-+ int eccres1;
-+ int eccres2;
-+};
-+
-+/* Block data in RAM */
-+
-+enum yaffs_block_state {
-+ YAFFS_BLOCK_STATE_UNKNOWN = 0,
-+
-+ YAFFS_BLOCK_STATE_SCANNING,
-+ /* Being scanned */
-+
-+ YAFFS_BLOCK_STATE_NEEDS_SCAN,
-+ /* The block might have something on it (ie it is allocating or full,
-+ * perhaps empty) but it needs to be scanned to determine its true
-+ * state.
-+ * This state is only valid during scanning.
-+ * NB We tolerate empty because the pre-scanner might be incapable of
-+ * deciding
-+ * However, if this state is returned on a YAFFS2 device,
-+ * then we expect a sequence number
-+ */
-+
-+ YAFFS_BLOCK_STATE_EMPTY,
-+ /* This block is empty */
-+
-+ YAFFS_BLOCK_STATE_ALLOCATING,
-+ /* This block is partially allocated.
-+ * At least one page holds valid data.
-+ * This is the one currently being used for page
-+ * allocation. Should never be more than one of these.
-+ * If a block is only partially allocated at mount it is treated as
-+ * full.
-+ */
-+
-+ YAFFS_BLOCK_STATE_FULL,
-+ /* All the pages in this block have been allocated.
-+ * If a block was only partially allocated when mounted we treat
-+ * it as fully allocated.
-+ */
-+
-+ YAFFS_BLOCK_STATE_DIRTY,
-+ /* The block was full and now all chunks have been deleted.
-+ * Erase me, reuse me.
-+ */
-+
-+ YAFFS_BLOCK_STATE_CHECKPOINT,
-+ /* This block is assigned to holding checkpoint data. */
-+
-+ YAFFS_BLOCK_STATE_COLLECTING,
-+ /* This block is being garbage collected */
-+
-+ YAFFS_BLOCK_STATE_DEAD
-+ /* This block has failed and is not in use */
-+};
-+
-+#define YAFFS_NUMBER_OF_BLOCK_STATES (YAFFS_BLOCK_STATE_DEAD + 1)
-+
-+struct yaffs_block_info {
-+
-+ s32 soft_del_pages:10; /* number of soft deleted pages */
-+ s32 pages_in_use:10; /* number of pages in use */
-+ u32 block_state:4; /* One of the above block states. */
-+ /* NB use unsigned because enum is sometimes
-+ * an int */
-+ u32 needs_retiring:1; /* Data has failed on this block, */
-+ /*need to get valid data off and retire*/
-+ u32 skip_erased_check:1;/* Skip the erased check on this block */
-+ u32 gc_prioritise:1; /* An ECC check or blank check has failed.
-+ Block should be prioritised for GC */
-+ u32 chunk_error_strikes:3; /* How many times we've had ecc etc
-+ failures on this block and tried to reuse it */
-+ u32 has_summary:1; /* The block has a summary */
-+
-+ u32 has_shrink_hdr:1; /* This block has at least one shrink header */
-+ u32 seq_number; /* block sequence number for yaffs2 */
-+
-+};
-+
-+/* -------------------------- Object structure -------------------------------*/
-+/* This is the object structure as stored on NAND */
-+
-+struct yaffs_obj_hdr {
-+ enum yaffs_obj_type type;
-+
-+ /* Apply to everything */
-+ int parent_obj_id;
-+ u16 sum_no_longer_used; /* checksum of name. No longer used */
-+ YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
-+
-+ /* The following apply to all object types except for hard links */
-+ u32 yst_mode; /* protection */
-+
-+ u32 yst_uid;
-+ u32 yst_gid;
-+ u32 yst_atime;
-+ u32 yst_mtime;
-+ u32 yst_ctime;
-+
-+ /* File size applies to files only */
-+ u32 file_size_low;
-+
-+ /* Equivalent object id applies to hard links only. */
-+ int equiv_id;
-+
-+ /* Alias is for symlinks only. */
-+ YCHAR alias[YAFFS_MAX_ALIAS_LENGTH + 1];
-+
-+ u32 yst_rdev; /* stuff for block and char devices (major/min) */
-+
-+ u32 win_ctime[2];
-+ u32 win_atime[2];
-+ u32 win_mtime[2];
-+
-+ u32 inband_shadowed_obj_id;
-+ u32 inband_is_shrink;
-+
-+ u32 file_size_high;
-+ u32 reserved[1];
-+ int shadows_obj; /* This object header shadows the
-+ specified object if > 0 */
-+
-+ /* is_shrink applies to object headers written when wemake a hole. */
-+ u32 is_shrink;
-+
-+};
-+
-+/*--------------------------- Tnode -------------------------- */
-+
-+struct yaffs_tnode {
-+ struct yaffs_tnode *internal[YAFFS_NTNODES_INTERNAL];
-+};
-+
-+/*------------------------ Object -----------------------------*/
-+/* An object can be one of:
-+ * - a directory (no data, has children links
-+ * - a regular file (data.... not prunes :->).
-+ * - a symlink [symbolic link] (the alias).
-+ * - a hard link
-+ */
-+
-+struct yaffs_file_var {
-+ loff_t file_size;
-+ loff_t scanned_size;
-+ loff_t shrink_size;
-+ int top_level;
-+ struct yaffs_tnode *top;
-+};
-+
-+struct yaffs_dir_var {
-+ struct list_head children; /* list of child links */
-+ struct list_head dirty; /* Entry for list of dirty directories */
-+};
-+
-+struct yaffs_symlink_var {
-+ YCHAR *alias;
-+};
-+
-+struct yaffs_hardlink_var {
-+ struct yaffs_obj *equiv_obj;
-+ u32 equiv_id;
-+};
-+
-+union yaffs_obj_var {
-+ struct yaffs_file_var file_variant;
-+ struct yaffs_dir_var dir_variant;
-+ struct yaffs_symlink_var symlink_variant;
-+ struct yaffs_hardlink_var hardlink_variant;
-+};
-+
-+struct yaffs_obj {
-+ u8 deleted:1; /* This should only apply to unlinked files. */
-+ u8 soft_del:1; /* it has also been soft deleted */
-+ u8 unlinked:1; /* An unlinked file.*/
-+ u8 fake:1; /* A fake object has no presence on NAND. */
-+ u8 rename_allowed:1; /* Some objects cannot be renamed. */
-+ u8 unlink_allowed:1;
-+ u8 dirty:1; /* the object needs to be written to flash */
-+ u8 valid:1; /* When the file system is being loaded up, this
-+ * object might be created before the data
-+ * is available
-+ * ie. file data chunks encountered before
-+ * the header.
-+ */
-+ u8 lazy_loaded:1; /* This object has been lazy loaded and
-+ * is missing some detail */
-+
-+ u8 defered_free:1; /* Object is removed from NAND, but is
-+ * still in the inode cache.
-+ * Free of object is defered.
-+ * until the inode is released.
-+ */
-+ u8 being_created:1; /* This object is still being created
-+ * so skip some verification checks. */
-+ u8 is_shadowed:1; /* This object is shadowed on the way
-+ * to being renamed. */
-+
-+ u8 xattr_known:1; /* We know if this has object has xattribs
-+ * or not. */
-+ u8 has_xattr:1; /* This object has xattribs.
-+ * Only valid if xattr_known. */
-+
-+ u8 serial; /* serial number of chunk in NAND.*/
-+ u16 sum; /* sum of the name to speed searching */
-+
-+ struct yaffs_dev *my_dev; /* The device I'm on */
-+
-+ struct list_head hash_link; /* list of objects in hash bucket */
-+
-+ struct list_head hard_links; /* hard linked object chain*/
-+
-+ /* directory structure stuff */
-+ /* also used for linking up the free list */
-+ struct yaffs_obj *parent;
-+ struct list_head siblings;
-+
-+ /* Where's my object header in NAND? */
-+ int hdr_chunk;
-+
-+ int n_data_chunks; /* Number of data chunks for this file. */
-+
-+ u32 obj_id; /* the object id value */
-+
-+ u32 yst_mode;
-+
-+ YCHAR short_name[YAFFS_SHORT_NAME_LENGTH + 1];
-+
-+#ifdef CONFIG_YAFFS_WINCE
-+ u32 win_ctime[2];
-+ u32 win_mtime[2];
-+ u32 win_atime[2];
-+#else
-+ u32 yst_uid;
-+ u32 yst_gid;
-+ u32 yst_atime;
-+ u32 yst_mtime;
-+ u32 yst_ctime;
-+#endif
-+
-+ u32 yst_rdev;
-+
-+ void *my_inode;
-+
-+ enum yaffs_obj_type variant_type;
-+
-+ union yaffs_obj_var variant;
-+
-+};
-+
-+struct yaffs_obj_bucket {
-+ struct list_head list;
-+ int count;
-+};
-+
-+/* yaffs_checkpt_obj holds the definition of an object as dumped
-+ * by checkpointing.
-+ */
-+
-+struct yaffs_checkpt_obj {
-+ int struct_type;
-+ u32 obj_id;
-+ u32 parent_id;
-+ int hdr_chunk;
-+ enum yaffs_obj_type variant_type:3;
-+ u8 deleted:1;
-+ u8 soft_del:1;
-+ u8 unlinked:1;
-+ u8 fake:1;
-+ u8 rename_allowed:1;
-+ u8 unlink_allowed:1;
-+ u8 serial;
-+ int n_data_chunks;
-+ loff_t size_or_equiv_obj;
-+};
-+
-+/*--------------------- Temporary buffers ----------------
-+ *
-+ * These are chunk-sized working buffers. Each device has a few.
-+ */
-+
-+struct yaffs_buffer {
-+ u8 *buffer;
-+ int in_use;
-+};
-+
-+/*----------------- Device ---------------------------------*/
-+
-+struct yaffs_param {
-+ const YCHAR *name;
-+
-+ /*
-+ * Entry parameters set up way early. Yaffs sets up the rest.
-+ * The structure should be zeroed out before use so that unused
-+ * and default values are zero.
-+ */
-+
-+ int inband_tags; /* Use unband tags */
-+ u32 total_bytes_per_chunk; /* Should be >= 512, does not need to
-+ be a power of 2 */
-+ int chunks_per_block; /* does not need to be a power of 2 */
-+ int spare_bytes_per_chunk; /* spare area size */
-+ int start_block; /* Start block we're allowed to use */
-+ int end_block; /* End block we're allowed to use */
-+ int n_reserved_blocks; /* Tuneable so that we can reduce
-+ * reserved blocks on NOR and RAM. */
-+
-+ int n_caches; /* If <= 0, then short op caching is disabled,
-+ * else the number of short op caches.
-+ */
-+ int cache_bypass_aligned; /* If non-zero then bypass the cache for
-+ * aligned writes.
-+ */
-+
-+ int use_nand_ecc; /* Flag to decide whether or not to use
-+ * NAND driver ECC on data (yaffs1) */
-+ int tags_9bytes; /* Use 9 byte tags */
-+ int no_tags_ecc; /* Flag to decide whether or not to do ECC
-+ * on packed tags (yaffs2) */
-+
-+ int is_yaffs2; /* Use yaffs2 mode on this device */
-+
-+ int empty_lost_n_found; /* Auto-empty lost+found directory on mount */
-+
-+ int refresh_period; /* How often to check for a block refresh */
-+
-+ /* Checkpoint control. Can be set before or after initialisation */
-+ u8 skip_checkpt_rd;
-+ u8 skip_checkpt_wr;
-+
-+ int enable_xattr; /* Enable xattribs */
-+
-+ int max_objects; /*
-+ * Set to limit the number of objects created.
-+ * 0 = no limit.
-+ */
-+
-+ /* The remove_obj_fn function must be supplied by OS flavours that
-+ * need it.
-+ * yaffs direct uses it to implement the faster readdir.
-+ * Linux uses it to protect the directory during unlocking.
-+ */
-+ void (*remove_obj_fn) (struct yaffs_obj *obj);
-+
-+ /* Callback to mark the superblock dirty */
-+ void (*sb_dirty_fn) (struct yaffs_dev *dev);
-+
-+ /* Callback to control garbage collection. */
-+ unsigned (*gc_control_fn) (struct yaffs_dev *dev);
-+
-+ /* Debug control flags. Don't use unless you know what you're doing */
-+ int use_header_file_size; /* Flag to determine if we should use
-+ * file sizes from the header */
-+ int disable_lazy_load; /* Disable lazy loading on this device */
-+ int wide_tnodes_disabled; /* Set to disable wide tnodes */
-+ int disable_soft_del; /* yaffs 1 only: Set to disable the use of
-+ * softdeletion. */
-+
-+ int defered_dir_update; /* Set to defer directory updates */
-+
-+#ifdef CONFIG_YAFFS_AUTO_UNICODE
-+ int auto_unicode;
-+#endif
-+ int always_check_erased; /* Force chunk erased check always on */
-+
-+ int disable_summary;
-+ int disable_bad_block_marking;
-+
-+};
-+
-+struct yaffs_driver {
-+ int (*drv_write_chunk_fn) (struct yaffs_dev *dev, int nand_chunk,
-+ const u8 *data, int data_len,
-+ const u8 *oob, int oob_len);
-+ int (*drv_read_chunk_fn) (struct yaffs_dev *dev, int nand_chunk,
-+ u8 *data, int data_len,
-+ u8 *oob, int oob_len,
-+ enum yaffs_ecc_result *ecc_result);
-+ int (*drv_erase_fn) (struct yaffs_dev *dev, int block_no);
-+ int (*drv_mark_bad_fn) (struct yaffs_dev *dev, int block_no);
-+ int (*drv_check_bad_fn) (struct yaffs_dev *dev, int block_no);
-+ int (*drv_initialise_fn) (struct yaffs_dev *dev);
-+ int (*drv_deinitialise_fn) (struct yaffs_dev *dev);
-+};
-+
-+struct yaffs_tags_handler {
-+ int (*write_chunk_tags_fn) (struct yaffs_dev *dev,
-+ int nand_chunk, const u8 *data,
-+ const struct yaffs_ext_tags *tags);
-+ int (*read_chunk_tags_fn) (struct yaffs_dev *dev,
-+ int nand_chunk, u8 *data,
-+ struct yaffs_ext_tags *tags);
-+
-+ int (*query_block_fn) (struct yaffs_dev *dev, int block_no,
-+ enum yaffs_block_state *state,
-+ u32 *seq_number);
-+ int (*mark_bad_fn) (struct yaffs_dev *dev, int block_no);
-+};
-+
-+struct yaffs_dev {
-+ struct yaffs_param param;
-+ struct yaffs_driver drv;
-+ struct yaffs_tags_handler tagger;
-+
-+ /* Context storage. Holds extra OS specific data for this device */
-+
-+ void *os_context;
-+ void *driver_context;
-+
-+ struct list_head dev_list;
-+
-+ int ll_init;
-+ /* Runtime parameters. Set up by YAFFS. */
-+ int data_bytes_per_chunk;
-+
-+ /* Non-wide tnode stuff */
-+ u16 chunk_grp_bits; /* Number of bits that need to be resolved if
-+ * the tnodes are not wide enough.
-+ */
-+ u16 chunk_grp_size; /* == 2^^chunk_grp_bits */
-+
-+ /* Stuff to support wide tnodes */
-+ u32 tnode_width;
-+ u32 tnode_mask;
-+ u32 tnode_size;
-+
-+ /* Stuff for figuring out file offset to chunk conversions */
-+ u32 chunk_shift; /* Shift value */
-+ u32 chunk_div; /* Divisor after shifting: 1 for 2^n sizes */
-+ u32 chunk_mask; /* Mask to use for power-of-2 case */
-+
-+ int is_mounted;
-+ int read_only;
-+ int is_checkpointed;
-+
-+ /* Stuff to support block offsetting to support start block zero */
-+ int internal_start_block;
-+ int internal_end_block;
-+ int block_offset;
-+ int chunk_offset;
-+
-+ /* Runtime checkpointing stuff */
-+ int checkpt_page_seq; /* running sequence number of checkpt pages */
-+ int checkpt_byte_count;
-+ int checkpt_byte_offs;
-+ u8 *checkpt_buffer;
-+ int checkpt_open_write;
-+ int blocks_in_checkpt;
-+ int checkpt_cur_chunk;
-+ int checkpt_cur_block;
-+ int checkpt_next_block;
-+ int *checkpt_block_list;
-+ int checkpt_max_blocks;
-+ u32 checkpt_sum;
-+ u32 checkpt_xor;
-+
-+ int checkpoint_blocks_required; /* Number of blocks needed to store
-+ * current checkpoint set */
-+
-+ /* Block Info */
-+ struct yaffs_block_info *block_info;
-+ u8 *chunk_bits; /* bitmap of chunks in use */
-+ u8 block_info_alt:1; /* allocated using alternative alloc */
-+ u8 chunk_bits_alt:1; /* allocated using alternative alloc */
-+ int chunk_bit_stride; /* Number of bytes of chunk_bits per block.
-+ * Must be consistent with chunks_per_block.
-+ */
-+
-+ int n_erased_blocks;
-+ int alloc_block; /* Current block being allocated off */
-+ u32 alloc_page;
-+ int alloc_block_finder; /* Used to search for next allocation block */
-+
-+ /* Object and Tnode memory management */
-+ void *allocator;
-+ int n_obj;
-+ int n_tnodes;
-+
-+ int n_hardlinks;
-+
-+ struct yaffs_obj_bucket obj_bucket[YAFFS_NOBJECT_BUCKETS];
-+ u32 bucket_finder;
-+
-+ int n_free_chunks;
-+
-+ /* Garbage collection control */
-+ u32 *gc_cleanup_list; /* objects to delete at the end of a GC. */
-+ u32 n_clean_ups;
-+
-+ unsigned has_pending_prioritised_gc; /* We think this device might
-+ have pending prioritised gcs */
-+ unsigned gc_disable;
-+ unsigned gc_block_finder;
-+ unsigned gc_dirtiest;
-+ unsigned gc_pages_in_use;
-+ unsigned gc_not_done;
-+ unsigned gc_block;
-+ unsigned gc_chunk;
-+ unsigned gc_skip;
-+ struct yaffs_summary_tags *gc_sum_tags;
-+
-+ /* Special directories */
-+ struct yaffs_obj *root_dir;
-+ struct yaffs_obj *lost_n_found;
-+
-+ int buffered_block; /* Which block is buffered here? */
-+ int doing_buffered_block_rewrite;
-+
-+ struct yaffs_cache *cache;
-+ int cache_last_use;
-+
-+ /* Stuff for background deletion and unlinked files. */
-+ struct yaffs_obj *unlinked_dir; /* Directory where unlinked and deleted
-+ files live. */
-+ struct yaffs_obj *del_dir; /* Directory where deleted objects are
-+ sent to disappear. */
-+ struct yaffs_obj *unlinked_deletion; /* Current file being
-+ background deleted. */
-+ int n_deleted_files; /* Count of files awaiting deletion; */
-+ int n_unlinked_files; /* Count of unlinked files. */
-+ int n_bg_deletions; /* Count of background deletions. */
-+
-+ /* Temporary buffer management */
-+ struct yaffs_buffer temp_buffer[YAFFS_N_TEMP_BUFFERS];
-+ int max_temp;
-+ int temp_in_use;
-+ int unmanaged_buffer_allocs;
-+ int unmanaged_buffer_deallocs;
-+
-+ /* yaffs2 runtime stuff */
-+ unsigned seq_number; /* Sequence number of currently
-+ allocating block */
-+ unsigned oldest_dirty_seq;
-+ unsigned oldest_dirty_block;
-+
-+ /* Block refreshing */
-+ int refresh_skip; /* A skip down counter.
-+ * Refresh happens when this gets to zero. */
-+
-+ /* Dirty directory handling */
-+ struct list_head dirty_dirs; /* List of dirty directories */
-+
-+ /* Summary */
-+ int chunks_per_summary;
-+ struct yaffs_summary_tags *sum_tags;
-+
-+ /* Statistics */
-+ u32 n_page_writes;
-+ u32 n_page_reads;
-+ u32 n_erasures;
-+ u32 n_bad_queries;
-+ u32 n_bad_markings;
-+ u32 n_erase_failures;
-+ u32 n_gc_copies;
-+ u32 all_gcs;
-+ u32 passive_gc_count;
-+ u32 oldest_dirty_gc_count;
-+ u32 n_gc_blocks;
-+ u32 bg_gcs;
-+ u32 n_retried_writes;
-+ u32 n_retired_blocks;
-+ u32 n_ecc_fixed;
-+ u32 n_ecc_unfixed;
-+ u32 n_tags_ecc_fixed;
-+ u32 n_tags_ecc_unfixed;
-+ u32 n_deletions;
-+ u32 n_unmarked_deletions;
-+ u32 refresh_count;
-+ u32 cache_hits;
-+ u32 tags_used;
-+ u32 summary_used;
-+
-+};
-+
-+/* The CheckpointDevice structure holds the device information that changes
-+ *at runtime and must be preserved over unmount/mount cycles.
-+ */
-+struct yaffs_checkpt_dev {
-+ int struct_type;
-+ int n_erased_blocks;
-+ int alloc_block; /* Current block being allocated off */
-+ u32 alloc_page;
-+ int n_free_chunks;
-+
-+ int n_deleted_files; /* Count of files awaiting deletion; */
-+ int n_unlinked_files; /* Count of unlinked files. */
-+ int n_bg_deletions; /* Count of background deletions. */
-+
-+ /* yaffs2 runtime stuff */
-+ unsigned seq_number; /* Sequence number of currently
-+ * allocating block */
-+
-+};
-+
-+struct yaffs_checkpt_validity {
-+ int struct_type;
-+ u32 magic;
-+ u32 version;
-+ u32 head;
-+};
-+
-+struct yaffs_shadow_fixer {
-+ int obj_id;
-+ int shadowed_id;
-+ struct yaffs_shadow_fixer *next;
-+};
-+
-+/* Structure for doing xattr modifications */
-+struct yaffs_xattr_mod {
-+ int set; /* If 0 then this is a deletion */
-+ const YCHAR *name;
-+ const void *data;
-+ int size;
-+ int flags;
-+ int result;
-+};
-+
-+/*----------------------- YAFFS Functions -----------------------*/
-+
-+int yaffs_guts_initialise(struct yaffs_dev *dev);
-+void yaffs_deinitialise(struct yaffs_dev *dev);
-+
-+int yaffs_get_n_free_chunks(struct yaffs_dev *dev);
-+
-+int yaffs_rename_obj(struct yaffs_obj *old_dir, const YCHAR * old_name,
-+ struct yaffs_obj *new_dir, const YCHAR * new_name);
-+
-+int yaffs_unlinker(struct yaffs_obj *dir, const YCHAR * name);
-+int yaffs_del_obj(struct yaffs_obj *obj);
-+struct yaffs_obj *yaffs_retype_obj(struct yaffs_obj *obj,
-+ enum yaffs_obj_type type);
-+
-+
-+int yaffs_get_obj_name(struct yaffs_obj *obj, YCHAR * name, int buffer_size);
-+loff_t yaffs_get_obj_length(struct yaffs_obj *obj);
-+int yaffs_get_obj_inode(struct yaffs_obj *obj);
-+unsigned yaffs_get_obj_type(struct yaffs_obj *obj);
-+int yaffs_get_obj_link_count(struct yaffs_obj *obj);
-+
-+/* File operations */
-+int yaffs_file_rd(struct yaffs_obj *obj, u8 * buffer, loff_t offset,
-+ int n_bytes);
-+int yaffs_wr_file(struct yaffs_obj *obj, const u8 * buffer, loff_t offset,
-+ int n_bytes, int write_trhrough);
-+int yaffs_resize_file(struct yaffs_obj *obj, loff_t new_size);
-+
-+struct yaffs_obj *yaffs_create_file(struct yaffs_obj *parent,
-+ const YCHAR *name, u32 mode, u32 uid,
-+ u32 gid);
-+
-+int yaffs_flush_file(struct yaffs_obj *in,
-+ int update_time,
-+ int data_sync,
-+ int discard_cache);
-+
-+/* Flushing and checkpointing */
-+void yaffs_flush_whole_cache(struct yaffs_dev *dev, int discard);
-+
-+int yaffs_checkpoint_save(struct yaffs_dev *dev);
-+int yaffs_checkpoint_restore(struct yaffs_dev *dev);
-+
-+/* Directory operations */
-+struct yaffs_obj *yaffs_create_dir(struct yaffs_obj *parent, const YCHAR *name,
-+ u32 mode, u32 uid, u32 gid);
-+struct yaffs_obj *yaffs_find_by_name(struct yaffs_obj *the_dir,
-+ const YCHAR *name);
-+struct yaffs_obj *yaffs_find_by_number(struct yaffs_dev *dev, u32 number);
-+
-+/* Link operations */
-+struct yaffs_obj *yaffs_link_obj(struct yaffs_obj *parent, const YCHAR *name,
-+ struct yaffs_obj *equiv_obj);
-+
-+struct yaffs_obj *yaffs_get_equivalent_obj(struct yaffs_obj *obj);
-+
-+/* Symlink operations */
-+struct yaffs_obj *yaffs_create_symlink(struct yaffs_obj *parent,
-+ const YCHAR *name, u32 mode, u32 uid,
-+ u32 gid, const YCHAR *alias);
-+YCHAR *yaffs_get_symlink_alias(struct yaffs_obj *obj);
-+
-+/* Special inodes (fifos, sockets and devices) */
-+struct yaffs_obj *yaffs_create_special(struct yaffs_obj *parent,
-+ const YCHAR *name, u32 mode, u32 uid,
-+ u32 gid, u32 rdev);
-+
-+int yaffs_set_xattrib(struct yaffs_obj *obj, const YCHAR *name,
-+ const void *value, int size, int flags);
-+int yaffs_get_xattrib(struct yaffs_obj *obj, const YCHAR *name, void *value,
-+ int size);
-+int yaffs_list_xattrib(struct yaffs_obj *obj, char *buffer, int size);
-+int yaffs_remove_xattrib(struct yaffs_obj *obj, const YCHAR *name);
-+
-+/* Special directories */
-+struct yaffs_obj *yaffs_root(struct yaffs_dev *dev);
-+struct yaffs_obj *yaffs_lost_n_found(struct yaffs_dev *dev);
-+
-+void yaffs_handle_defered_free(struct yaffs_obj *obj);
-+
-+void yaffs_update_dirty_dirs(struct yaffs_dev *dev);
-+
-+int yaffs_bg_gc(struct yaffs_dev *dev, unsigned urgency);
-+
-+/* Debug dump */
-+int yaffs_dump_obj(struct yaffs_obj *obj);
-+
-+void yaffs_guts_test(struct yaffs_dev *dev);
-+int yaffs_guts_ll_init(struct yaffs_dev *dev);
-+
-+
-+/* A few useful functions to be used within the core files*/
-+void yaffs_chunk_del(struct yaffs_dev *dev, int chunk_id, int mark_flash,
-+ int lyn);
-+int yaffs_check_ff(u8 *buffer, int n_bytes);
-+void yaffs_handle_chunk_error(struct yaffs_dev *dev,
-+ struct yaffs_block_info *bi);
-+
-+u8 *yaffs_get_temp_buffer(struct yaffs_dev *dev);
-+void yaffs_release_temp_buffer(struct yaffs_dev *dev, u8 *buffer);
-+
-+struct yaffs_obj *yaffs_find_or_create_by_number(struct yaffs_dev *dev,
-+ int number,
-+ enum yaffs_obj_type type);
-+int yaffs_put_chunk_in_file(struct yaffs_obj *in, int inode_chunk,
-+ int nand_chunk, int in_scan);
-+void yaffs_set_obj_name(struct yaffs_obj *obj, const YCHAR *name);
-+void yaffs_set_obj_name_from_oh(struct yaffs_obj *obj,
-+ const struct yaffs_obj_hdr *oh);
-+void yaffs_add_obj_to_dir(struct yaffs_obj *directory, struct yaffs_obj *obj);
-+YCHAR *yaffs_clone_str(const YCHAR *str);
-+void yaffs_link_fixup(struct yaffs_dev *dev, struct list_head *hard_list);
-+void yaffs_block_became_dirty(struct yaffs_dev *dev, int block_no);
-+int yaffs_update_oh(struct yaffs_obj *in, const YCHAR *name,
-+ int force, int is_shrink, int shadows,
-+ struct yaffs_xattr_mod *xop);
-+void yaffs_handle_shadowed_obj(struct yaffs_dev *dev, int obj_id,
-+ int backward_scanning);
-+int yaffs_check_alloc_available(struct yaffs_dev *dev, int n_chunks);
-+struct yaffs_tnode *yaffs_get_tnode(struct yaffs_dev *dev);
-+struct yaffs_tnode *yaffs_add_find_tnode_0(struct yaffs_dev *dev,
-+ struct yaffs_file_var *file_struct,
-+ u32 chunk_id,
-+ struct yaffs_tnode *passed_tn);
-+
-+int yaffs_do_file_wr(struct yaffs_obj *in, const u8 *buffer, loff_t offset,
-+ int n_bytes, int write_trhrough);
-+void yaffs_resize_file_down(struct yaffs_obj *obj, loff_t new_size);
-+void yaffs_skip_rest_of_block(struct yaffs_dev *dev);
-+
-+int yaffs_count_free_chunks(struct yaffs_dev *dev);
-+
-+struct yaffs_tnode *yaffs_find_tnode_0(struct yaffs_dev *dev,
-+ struct yaffs_file_var *file_struct,
-+ u32 chunk_id);
-+
-+u32 yaffs_get_group_base(struct yaffs_dev *dev, struct yaffs_tnode *tn,
-+ unsigned pos);
-+
-+int yaffs_is_non_empty_dir(struct yaffs_obj *obj);
-+
-+int yaffs_guts_format_dev(struct yaffs_dev *dev);
-+
-+void yaffs_addr_to_chunk(struct yaffs_dev *dev, loff_t addr,
-+ int *chunk_out, u32 *offset_out);
-+/*
-+ * Marshalling functions to get loff_t file sizes into aand out of
-+ * object headers.
-+ */
-+void yaffs_oh_size_load(struct yaffs_obj_hdr *oh, loff_t fsize);
-+loff_t yaffs_oh_to_size(struct yaffs_obj_hdr *oh);
-+loff_t yaffs_max_file_size(struct yaffs_dev *dev);
-+
-+/*
-+ * Debug function to count number of blocks in each state
-+ * NB Needs to be called with correct number of integers
-+ */
-+
-+void yaffs_count_blocks_by_state(struct yaffs_dev *dev, int bs[10]);
-+
-+int yaffs_find_chunk_in_file(struct yaffs_obj *in, int inode_chunk,
-+ struct yaffs_ext_tags *tags);
-+
-+#endif
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_linux.h linux-3.18.14/fs/yaffs2/yaffs_linux.h
---- linux-3.18.14.orig/fs/yaffs2/yaffs_linux.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_linux.h 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,48 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_LINUX_H__
-+#define __YAFFS_LINUX_H__
-+
-+#include "yportenv.h"
-+
-+struct yaffs_linux_context {
-+ struct list_head context_list; /* List of these we have mounted */
-+ struct yaffs_dev *dev;
-+ struct super_block *super;
-+ struct task_struct *bg_thread; /* Background thread for this device */
-+ int bg_running;
-+ struct mutex gross_lock; /* Gross locking mutex*/
-+ u8 *spare_buffer; /* For mtdif2 use. Don't know the buffer size
-+ * at compile time so we have to allocate it.
-+ */
-+ struct list_head search_contexts;
-+ struct task_struct *readdir_process;
-+ unsigned mount_id;
-+ int dirty;
-+};
-+
-+#define yaffs_dev_to_lc(dev) ((struct yaffs_linux_context *)((dev)->os_context))
-+#define yaffs_dev_to_mtd(dev) ((struct mtd_info *)((dev)->driver_context))
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-+#define WRITE_SIZE_STR "writesize"
-+#define WRITE_SIZE(mtd) ((mtd)->writesize)
-+#else
-+#define WRITE_SIZE_STR "oobblock"
-+#define WRITE_SIZE(mtd) ((mtd)->oobblock)
-+#endif
-+
-+#endif
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_mtdif.c linux-3.18.14/fs/yaffs2/yaffs_mtdif.c
---- linux-3.18.14.orig/fs/yaffs2/yaffs_mtdif.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_mtdif.c 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,310 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yportenv.h"
-+
-+#include "yaffs_mtdif.h"
-+
-+#include "linux/mtd/mtd.h"
-+#include "linux/types.h"
-+#include "linux/time.h"
-+#include "linux/mtd/nand.h"
-+#include "linux/kernel.h"
-+#include "linux/version.h"
-+#include "linux/types.h"
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 14, 0))
-+#include "uapi/linux/major.h"
-+#endif
-+
-+#include "yaffs_trace.h"
-+#include "yaffs_guts.h"
-+#include "yaffs_linux.h"
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 2, 0))
-+#define MTD_OPS_AUTO_OOB MTD_OOB_AUTO
-+#endif
-+
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 4, 0))
-+#define mtd_erase(m, ei) (m)->erase(m, ei)
-+#define mtd_write_oob(m, addr, pops) (m)->write_oob(m, addr, pops)
-+#define mtd_read_oob(m, addr, pops) (m)->read_oob(m, addr, pops)
-+#define mtd_block_isbad(m, offs) (m)->block_isbad(m, offs)
-+#define mtd_block_markbad(m, offs) (m)->block_markbad(m, offs)
-+#endif
-+
-+
-+
-+int nandmtd_erase_block(struct yaffs_dev *dev, int block_no)
-+{
-+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
-+ u32 addr =
-+ ((loff_t) block_no) * dev->param.total_bytes_per_chunk *
-+ dev->param.chunks_per_block;
-+ struct erase_info ei;
-+ int retval = 0;
-+
-+ ei.mtd = mtd;
-+ ei.addr = addr;
-+ ei.len = dev->param.total_bytes_per_chunk * dev->param.chunks_per_block;
-+ ei.time = 1000;
-+ ei.retries = 2;
-+ ei.callback = NULL;
-+ ei.priv = (u_long) dev;
-+
-+ retval = mtd_erase(mtd, &ei);
-+
-+ if (retval == 0)
-+ return YAFFS_OK;
-+
-+ return YAFFS_FAIL;
-+}
-+
-+
-+static int yaffs_mtd_write(struct yaffs_dev *dev, int nand_chunk,
-+ const u8 *data, int data_len,
-+ const u8 *oob, int oob_len)
-+{
-+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
-+ loff_t addr;
-+ struct mtd_oob_ops ops;
-+ int retval;
-+
-+ yaffs_trace(YAFFS_TRACE_MTD,
-+ "yaffs_mtd_write(%p, %d, %p, %d, %p, %d)\n",
-+ dev, nand_chunk, data, data_len, oob, oob_len);
-+
-+ if (!data || !data_len) {
-+ data = NULL;
-+ data_len = 0;
-+ }
-+
-+ if (!oob || !oob_len) {
-+ oob = NULL;
-+ oob_len = 0;
-+ }
-+
-+ addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk;
-+ memset(&ops, 0, sizeof(ops));
-+ ops.mode = MTD_OPS_AUTO_OOB;
-+ ops.len = (data) ? data_len : 0;
-+ ops.ooblen = oob_len;
-+ ops.datbuf = (u8 *)data;
-+ ops.oobbuf = (u8 *)oob;
-+
-+ retval = mtd_write_oob(mtd, addr, &ops);
-+ if (retval) {
-+ yaffs_trace(YAFFS_TRACE_MTD,
-+ "write_oob failed, chunk %d, mtd error %d",
-+ nand_chunk, retval);
-+ }
-+ return retval ? YAFFS_FAIL : YAFFS_OK;
-+}
-+
-+static int yaffs_mtd_read(struct yaffs_dev *dev, int nand_chunk,
-+ u8 *data, int data_len,
-+ u8 *oob, int oob_len,
-+ enum yaffs_ecc_result *ecc_result)
-+{
-+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
-+ loff_t addr;
-+ struct mtd_oob_ops ops;
-+ int retval;
-+
-+ addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk;
-+ memset(&ops, 0, sizeof(ops));
-+ ops.mode = MTD_OPS_AUTO_OOB;
-+ ops.len = (data) ? data_len : 0;
-+ ops.ooblen = oob_len;
-+ ops.datbuf = data;
-+ ops.oobbuf = oob;
-+
-+#if (MTD_VERSION_CODE < MTD_VERSION(2, 6, 20))
-+ /* In MTD 2.6.18 to 2.6.19 nand_base.c:nand_do_read_oob() has a bug;
-+ * help it out with ops.len = ops.ooblen when ops.datbuf == NULL.
-+ */
-+ ops.len = (ops.datbuf) ? ops.len : ops.ooblen;
-+#endif
-+ /* Read page and oob using MTD.
-+ * Check status and determine ECC result.
-+ */
-+ retval = mtd_read_oob(mtd, addr, &ops);
-+ if (retval)
-+ yaffs_trace(YAFFS_TRACE_MTD,
-+ "read_oob failed, chunk %d, mtd error %d",
-+ nand_chunk, retval);
-+
-+ switch (retval) {
-+ case 0:
-+ /* no error */
-+ if(ecc_result)
-+ *ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
-+ break;
-+
-+ case -EUCLEAN:
-+ /* MTD's ECC fixed the data */
-+ if(ecc_result)
-+ *ecc_result = YAFFS_ECC_RESULT_FIXED;
-+ dev->n_ecc_fixed++;
-+ break;
-+
-+ case -EBADMSG:
-+ default:
-+ /* MTD's ECC could not fix the data */
-+ dev->n_ecc_unfixed++;
-+ if(ecc_result)
-+ *ecc_result = YAFFS_ECC_RESULT_UNFIXED;
-+ return YAFFS_FAIL;
-+ }
-+
-+ return YAFFS_OK;
-+}
-+
-+static int yaffs_mtd_erase(struct yaffs_dev *dev, int block_no)
-+{
-+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
-+
-+ loff_t addr;
-+ struct erase_info ei;
-+ int retval = 0;
-+ u32 block_size;
-+
-+ block_size = dev->param.total_bytes_per_chunk *
-+ dev->param.chunks_per_block;
-+ addr = ((loff_t) block_no) * block_size;
-+
-+ ei.mtd = mtd;
-+ ei.addr = addr;
-+ ei.len = block_size;
-+ ei.time = 1000;
-+ ei.retries = 2;
-+ ei.callback = NULL;
-+ ei.priv = (u_long) dev;
-+
-+ retval = mtd_erase(mtd, &ei);
-+
-+ if (retval == 0)
-+ return YAFFS_OK;
-+
-+ return YAFFS_FAIL;
-+}
-+
-+static int yaffs_mtd_mark_bad(struct yaffs_dev *dev, int block_no)
-+{
-+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
-+ int blocksize = dev->param.chunks_per_block * dev->param.total_bytes_per_chunk;
-+ int retval;
-+
-+ yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, "marking block %d bad", block_no);
-+
-+ retval = mtd_block_markbad(mtd, (loff_t) blocksize * block_no);
-+ return (retval) ? YAFFS_FAIL : YAFFS_OK;
-+}
-+
-+static int yaffs_mtd_check_bad(struct yaffs_dev *dev, int block_no)
-+{
-+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
-+ int blocksize = dev->param.chunks_per_block * dev->param.total_bytes_per_chunk;
-+ int retval;
-+
-+ yaffs_trace(YAFFS_TRACE_MTD, "checking block %d bad", block_no);
-+
-+ retval = mtd_block_isbad(mtd, (loff_t) blocksize * block_no);
-+ return (retval) ? YAFFS_FAIL : YAFFS_OK;
-+}
-+
-+static int yaffs_mtd_initialise(struct yaffs_dev *dev)
-+{
-+ return YAFFS_OK;
-+}
-+
-+static int yaffs_mtd_deinitialise(struct yaffs_dev *dev)
-+{
-+ return YAFFS_OK;
-+}
-+
-+
-+void yaffs_mtd_drv_install(struct yaffs_dev *dev)
-+{
-+ struct yaffs_driver *drv = &dev->drv;
-+
-+ drv->drv_write_chunk_fn = yaffs_mtd_write;
-+ drv->drv_read_chunk_fn = yaffs_mtd_read;
-+ drv->drv_erase_fn = yaffs_mtd_erase;
-+ drv->drv_mark_bad_fn = yaffs_mtd_mark_bad;
-+ drv->drv_check_bad_fn = yaffs_mtd_check_bad;
-+ drv->drv_initialise_fn = yaffs_mtd_initialise;
-+ drv->drv_deinitialise_fn = yaffs_mtd_deinitialise;
-+}
-+
-+
-+struct mtd_info * yaffs_get_mtd_device(dev_t sdev)
-+{
-+ struct mtd_info *mtd;
-+
-+ mtd = yaffs_get_mtd_device(sdev);
-+
-+ /* Check it's an mtd device..... */
-+ if (MAJOR(sdev) != MTD_BLOCK_MAJOR)
-+ return NULL; /* This isn't an mtd device */
-+
-+ /* Check it's NAND */
-+ if (mtd->type != MTD_NANDFLASH) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs: MTD device is not NAND it's type %d",
-+ mtd->type);
-+ return NULL;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_OS, " %s %d", WRITE_SIZE_STR, WRITE_SIZE(mtd));
-+ yaffs_trace(YAFFS_TRACE_OS, " oobsize %d", mtd->oobsize);
-+ yaffs_trace(YAFFS_TRACE_OS, " erasesize %d", mtd->erasesize);
-+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
-+ yaffs_trace(YAFFS_TRACE_OS, " size %u", mtd->size);
-+#else
-+ yaffs_trace(YAFFS_TRACE_OS, " size %lld", mtd->size);
-+#endif
-+
-+ return mtd;
-+}
-+
-+int yaffs_verify_mtd(struct mtd_info *mtd, int yaffs_version, int inband_tags)
-+{
-+ if (yaffs_version == 2) {
-+ if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
-+ mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) &&
-+ !inband_tags) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "MTD device does not have the right page sizes"
-+ );
-+ return -1;
-+ }
-+ } else {
-+ if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK ||
-+ mtd->oobsize != YAFFS_BYTES_PER_SPARE) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "MTD device does not support have the right page sizes"
-+ );
-+ return -1;
-+ }
-+ }
-+
-+ return 0;
-+}
-+
-+
-+void yaffs_put_mtd_device(struct mtd_info *mtd)
-+{
-+ if(mtd)
-+ put_mtd_device(mtd);
-+}
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_mtdif.h linux-3.18.14/fs/yaffs2/yaffs_mtdif.h
---- linux-3.18.14.orig/fs/yaffs2/yaffs_mtdif.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_mtdif.h 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,25 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_MTDIF_H__
-+#define __YAFFS_MTDIF_H__
-+
-+#include "yaffs_guts.h"
-+
-+void yaffs_mtd_drv_install(struct yaffs_dev *dev);
-+struct mtd_info * yaffs_get_mtd_device(dev_t sdev);
-+void yaffs_put_mtd_device(struct mtd_info *mtd);
-+int yaffs_verify_mtd(struct mtd_info *mtd, int yaffs_version, int inband_tags);
-+#endif
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_nameval.c linux-3.18.14/fs/yaffs2/yaffs_nameval.c
---- linux-3.18.14.orig/fs/yaffs2/yaffs_nameval.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_nameval.c 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,208 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+/*
-+ * This simple implementation of a name-value store assumes a small number of
-+* values and fits into a small finite buffer.
-+ *
-+ * Each attribute is stored as a record:
-+ * sizeof(int) bytes record size.
-+ * strnlen+1 bytes name null terminated.
-+ * nbytes value.
-+ * ----------
-+ * total size stored in record size
-+ *
-+ * This code has not been tested with unicode yet.
-+ */
-+
-+#include "yaffs_nameval.h"
-+
-+#include "yportenv.h"
-+
-+static int nval_find(const char *xb, int xb_size, const YCHAR *name,
-+ int *exist_size)
-+{
-+ int pos = 0;
-+ int size;
-+
-+ memcpy(&size, xb, sizeof(int));
-+ while (size > 0 && (size < xb_size) && (pos + size < xb_size)) {
-+ if (!strncmp((YCHAR *) (xb + pos + sizeof(int)),
-+ name, size)) {
-+ if (exist_size)
-+ *exist_size = size;
-+ return pos;
-+ }
-+ pos += size;
-+ if (pos < xb_size - sizeof(int))
-+ memcpy(&size, xb + pos, sizeof(int));
-+ else
-+ size = 0;
-+ }
-+ if (exist_size)
-+ *exist_size = 0;
-+ return -ENODATA;
-+}
-+
-+static int nval_used(const char *xb, int xb_size)
-+{
-+ int pos = 0;
-+ int size;
-+
-+ memcpy(&size, xb + pos, sizeof(int));
-+ while (size > 0 && (size < xb_size) && (pos + size < xb_size)) {
-+ pos += size;
-+ if (pos < xb_size - sizeof(int))
-+ memcpy(&size, xb + pos, sizeof(int));
-+ else
-+ size = 0;
-+ }
-+ return pos;
-+}
-+
-+int nval_del(char *xb, int xb_size, const YCHAR *name)
-+{
-+ int pos = nval_find(xb, xb_size, name, NULL);
-+ int size;
-+
-+ if (pos < 0 || pos >= xb_size)
-+ return -ENODATA;
-+
-+ /* Find size, shift rest over this record,
-+ * then zero out the rest of buffer */
-+ memcpy(&size, xb + pos, sizeof(int));
-+ memcpy(xb + pos, xb + pos + size, xb_size - (pos + size));
-+ memset(xb + (xb_size - size), 0, size);
-+ return 0;
-+}
-+
-+int nval_set(char *xb, int xb_size, const YCHAR *name, const char *buf,
-+ int bsize, int flags)
-+{
-+ int pos;
-+ int namelen = strnlen(name, xb_size);
-+ int reclen;
-+ int size_exist = 0;
-+ int space;
-+ int start;
-+
-+ pos = nval_find(xb, xb_size, name, &size_exist);
-+
-+ if (flags & XATTR_CREATE && pos >= 0)
-+ return -EEXIST;
-+ if (flags & XATTR_REPLACE && pos < 0)
-+ return -ENODATA;
-+
-+ start = nval_used(xb, xb_size);
-+ space = xb_size - start + size_exist;
-+
-+ reclen = (sizeof(int) + namelen + 1 + bsize);
-+
-+ if (reclen > space)
-+ return -ENOSPC;
-+
-+ if (pos >= 0) {
-+ nval_del(xb, xb_size, name);
-+ start = nval_used(xb, xb_size);
-+ }
-+
-+ pos = start;
-+
-+ memcpy(xb + pos, &reclen, sizeof(int));
-+ pos += sizeof(int);
-+ strncpy((YCHAR *) (xb + pos), name, reclen);
-+ pos += (namelen + 1);
-+ memcpy(xb + pos, buf, bsize);
-+ return 0;
-+}
-+
-+int nval_get(const char *xb, int xb_size, const YCHAR * name, char *buf,
-+ int bsize)
-+{
-+ int pos = nval_find(xb, xb_size, name, NULL);
-+ int size;
-+
-+ if (pos >= 0 && pos < xb_size) {
-+
-+ memcpy(&size, xb + pos, sizeof(int));
-+ pos += sizeof(int); /* advance past record length */
-+ size -= sizeof(int);
-+
-+ /* Advance over name string */
-+ while (xb[pos] && size > 0 && pos < xb_size) {
-+ pos++;
-+ size--;
-+ }
-+ /*Advance over NUL */
-+ pos++;
-+ size--;
-+
-+ /* If bsize is zero then this is a size query.
-+ * Return the size, but don't copy.
-+ */
-+ if (!bsize)
-+ return size;
-+
-+ if (size <= bsize) {
-+ memcpy(buf, xb + pos, size);
-+ return size;
-+ }
-+ }
-+ if (pos >= 0)
-+ return -ERANGE;
-+
-+ return -ENODATA;
-+}
-+
-+int nval_list(const char *xb, int xb_size, char *buf, int bsize)
-+{
-+ int pos = 0;
-+ int size;
-+ int name_len;
-+ int ncopied = 0;
-+ int filled = 0;
-+
-+ memcpy(&size, xb + pos, sizeof(int));
-+ while (size > sizeof(int) &&
-+ size <= xb_size &&
-+ (pos + size) < xb_size &&
-+ !filled) {
-+ pos += sizeof(int);
-+ size -= sizeof(int);
-+ name_len = strnlen((YCHAR *) (xb + pos), size);
-+ if (ncopied + name_len + 1 < bsize) {
-+ memcpy(buf, xb + pos, name_len * sizeof(YCHAR));
-+ buf += name_len;
-+ *buf = '\0';
-+ buf++;
-+ if (sizeof(YCHAR) > 1) {
-+ *buf = '\0';
-+ buf++;
-+ }
-+ ncopied += (name_len + 1);
-+ } else {
-+ filled = 1;
-+ }
-+ pos += size;
-+ if (pos < xb_size - sizeof(int))
-+ memcpy(&size, xb + pos, sizeof(int));
-+ else
-+ size = 0;
-+ }
-+ return ncopied;
-+}
-+
-+int nval_hasvalues(const char *xb, int xb_size)
-+{
-+ return nval_used(xb, xb_size) > 0;
-+}
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_nameval.h linux-3.18.14/fs/yaffs2/yaffs_nameval.h
---- linux-3.18.14.orig/fs/yaffs2/yaffs_nameval.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_nameval.h 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,28 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __NAMEVAL_H__
-+#define __NAMEVAL_H__
-+
-+#include "yportenv.h"
-+
-+int nval_del(char *xb, int xb_size, const YCHAR * name);
-+int nval_set(char *xb, int xb_size, const YCHAR * name, const char *buf,
-+ int bsize, int flags);
-+int nval_get(const char *xb, int xb_size, const YCHAR * name, char *buf,
-+ int bsize);
-+int nval_list(const char *xb, int xb_size, char *buf, int bsize);
-+int nval_hasvalues(const char *xb, int xb_size);
-+#endif
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_nand.c linux-3.18.14/fs/yaffs2/yaffs_nand.c
---- linux-3.18.14.orig/fs/yaffs2/yaffs_nand.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_nand.c 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,122 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_nand.h"
-+#include "yaffs_tagscompat.h"
-+
-+#include "yaffs_getblockinfo.h"
-+#include "yaffs_summary.h"
-+
-+static int apply_chunk_offset(struct yaffs_dev *dev, int chunk)
-+{
-+ return chunk - dev->chunk_offset;
-+}
-+
-+int yaffs_rd_chunk_tags_nand(struct yaffs_dev *dev, int nand_chunk,
-+ u8 *buffer, struct yaffs_ext_tags *tags)
-+{
-+ int result;
-+ struct yaffs_ext_tags local_tags;
-+ int flash_chunk = apply_chunk_offset(dev, nand_chunk);
-+
-+ dev->n_page_reads++;
-+
-+ /* If there are no tags provided use local tags. */
-+ if (!tags)
-+ tags = &local_tags;
-+
-+ result = dev->tagger.read_chunk_tags_fn(dev, flash_chunk, buffer, tags);
-+ if (tags && tags->ecc_result > YAFFS_ECC_RESULT_NO_ERROR) {
-+
-+ struct yaffs_block_info *bi;
-+ bi = yaffs_get_block_info(dev,
-+ nand_chunk /
-+ dev->param.chunks_per_block);
-+ yaffs_handle_chunk_error(dev, bi);
-+ }
-+ return result;
-+}
-+
-+int yaffs_wr_chunk_tags_nand(struct yaffs_dev *dev,
-+ int nand_chunk,
-+ const u8 *buffer, struct yaffs_ext_tags *tags)
-+{
-+ int result;
-+ int flash_chunk = apply_chunk_offset(dev, nand_chunk);
-+
-+ dev->n_page_writes++;
-+
-+ if (!tags) {
-+ yaffs_trace(YAFFS_TRACE_ERROR, "Writing with no tags");
-+ BUG();
-+ return YAFFS_FAIL;
-+ }
-+
-+ tags->seq_number = dev->seq_number;
-+ tags->chunk_used = 1;
-+ yaffs_trace(YAFFS_TRACE_WRITE,
-+ "Writing chunk %d tags %d %d",
-+ nand_chunk, tags->obj_id, tags->chunk_id);
-+
-+ result = dev->tagger.write_chunk_tags_fn(dev, flash_chunk,
-+ buffer, tags);
-+
-+ yaffs_summary_add(dev, tags, nand_chunk);
-+
-+ return result;
-+}
-+
-+int yaffs_mark_bad(struct yaffs_dev *dev, int block_no)
-+{
-+ block_no -= dev->block_offset;
-+ dev->n_bad_markings++;
-+
-+ if (dev->param.disable_bad_block_marking)
-+ return YAFFS_OK;
-+
-+ return dev->tagger.mark_bad_fn(dev, block_no);
-+}
-+
-+
-+int yaffs_query_init_block_state(struct yaffs_dev *dev,
-+ int block_no,
-+ enum yaffs_block_state *state,
-+ u32 *seq_number)
-+{
-+ block_no -= dev->block_offset;
-+ return dev->tagger.query_block_fn(dev, block_no, state, seq_number);
-+}
-+
-+int yaffs_erase_block(struct yaffs_dev *dev, int block_no)
-+{
-+ int result;
-+
-+ block_no -= dev->block_offset;
-+ dev->n_erasures++;
-+ result = dev->drv.drv_erase_fn(dev, block_no);
-+ return result;
-+}
-+
-+int yaffs_init_nand(struct yaffs_dev *dev)
-+{
-+ if (dev->drv.drv_initialise_fn)
-+ return dev->drv.drv_initialise_fn(dev);
-+ return YAFFS_OK;
-+}
-+
-+int yaffs_deinit_nand(struct yaffs_dev *dev)
-+{
-+ if (dev->drv.drv_deinitialise_fn)
-+ return dev->drv.drv_deinitialise_fn(dev);
-+ return YAFFS_OK;
-+}
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_nand.h linux-3.18.14/fs/yaffs2/yaffs_nand.h
---- linux-3.18.14.orig/fs/yaffs2/yaffs_nand.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_nand.h 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,39 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_NAND_H__
-+#define __YAFFS_NAND_H__
-+#include "yaffs_guts.h"
-+
-+int yaffs_rd_chunk_tags_nand(struct yaffs_dev *dev, int nand_chunk,
-+ u8 *buffer, struct yaffs_ext_tags *tags);
-+
-+int yaffs_wr_chunk_tags_nand(struct yaffs_dev *dev,
-+ int nand_chunk,
-+ const u8 *buffer, struct yaffs_ext_tags *tags);
-+
-+int yaffs_mark_bad(struct yaffs_dev *dev, int block_no);
-+
-+int yaffs_query_init_block_state(struct yaffs_dev *dev,
-+ int block_no,
-+ enum yaffs_block_state *state,
-+ unsigned *seq_number);
-+
-+int yaffs_erase_block(struct yaffs_dev *dev, int flash_block);
-+
-+int yaffs_init_nand(struct yaffs_dev *dev);
-+int yaffs_deinit_nand(struct yaffs_dev *dev);
-+
-+#endif
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_packedtags1.c linux-3.18.14/fs/yaffs2/yaffs_packedtags1.c
---- linux-3.18.14.orig/fs/yaffs2/yaffs_packedtags1.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_packedtags1.c 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,56 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_packedtags1.h"
-+#include "yportenv.h"
-+
-+static const u8 all_ff[20] = {
-+ 0xff, 0xff, 0xff, 0xff,
-+ 0xff, 0xff, 0xff, 0xff,
-+ 0xff, 0xff, 0xff, 0xff,
-+ 0xff, 0xff, 0xff, 0xff,
-+ 0xff, 0xff, 0xff, 0xff
-+};
-+
-+void yaffs_pack_tags1(struct yaffs_packed_tags1 *pt,
-+ const struct yaffs_ext_tags *t)
-+{
-+ pt->chunk_id = t->chunk_id;
-+ pt->serial_number = t->serial_number;
-+ pt->n_bytes = t->n_bytes;
-+ pt->obj_id = t->obj_id;
-+ pt->ecc = 0;
-+ pt->deleted = (t->is_deleted) ? 0 : 1;
-+ pt->unused_stuff = 0;
-+ pt->should_be_ff = 0xffffffff;
-+}
-+
-+void yaffs_unpack_tags1(struct yaffs_ext_tags *t,
-+ const struct yaffs_packed_tags1 *pt)
-+{
-+
-+ if (memcmp(all_ff, pt, sizeof(struct yaffs_packed_tags1))) {
-+ t->block_bad = 0;
-+ if (pt->should_be_ff != 0xffffffff)
-+ t->block_bad = 1;
-+ t->chunk_used = 1;
-+ t->obj_id = pt->obj_id;
-+ t->chunk_id = pt->chunk_id;
-+ t->n_bytes = pt->n_bytes;
-+ t->ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
-+ t->is_deleted = (pt->deleted) ? 0 : 1;
-+ t->serial_number = pt->serial_number;
-+ } else {
-+ memset(t, 0, sizeof(struct yaffs_ext_tags));
-+ }
-+}
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_packedtags1.h linux-3.18.14/fs/yaffs2/yaffs_packedtags1.h
---- linux-3.18.14.orig/fs/yaffs2/yaffs_packedtags1.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_packedtags1.h 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,39 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+/* This is used to pack YAFFS1 tags, not YAFFS2 tags. */
-+
-+#ifndef __YAFFS_PACKEDTAGS1_H__
-+#define __YAFFS_PACKEDTAGS1_H__
-+
-+#include "yaffs_guts.h"
-+
-+struct yaffs_packed_tags1 {
-+ u32 chunk_id:20;
-+ u32 serial_number:2;
-+ u32 n_bytes:10;
-+ u32 obj_id:18;
-+ u32 ecc:12;
-+ u32 deleted:1;
-+ u32 unused_stuff:1;
-+ unsigned should_be_ff;
-+
-+};
-+
-+void yaffs_pack_tags1(struct yaffs_packed_tags1 *pt,
-+ const struct yaffs_ext_tags *t);
-+void yaffs_unpack_tags1(struct yaffs_ext_tags *t,
-+ const struct yaffs_packed_tags1 *pt);
-+#endif
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_packedtags2.c linux-3.18.14/fs/yaffs2/yaffs_packedtags2.c
---- linux-3.18.14.orig/fs/yaffs2/yaffs_packedtags2.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_packedtags2.c 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,197 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_packedtags2.h"
-+#include "yportenv.h"
-+#include "yaffs_trace.h"
-+
-+/* This code packs a set of extended tags into a binary structure for
-+ * NAND storage
-+ */
-+
-+/* Some of the information is "extra" struff which can be packed in to
-+ * speed scanning
-+ * This is defined by having the EXTRA_HEADER_INFO_FLAG set.
-+ */
-+
-+/* Extra flags applied to chunk_id */
-+
-+#define EXTRA_HEADER_INFO_FLAG 0x80000000
-+#define EXTRA_SHRINK_FLAG 0x40000000
-+#define EXTRA_SHADOWS_FLAG 0x20000000
-+#define EXTRA_SPARE_FLAGS 0x10000000
-+
-+#define ALL_EXTRA_FLAGS 0xf0000000
-+
-+/* Also, the top 4 bits of the object Id are set to the object type. */
-+#define EXTRA_OBJECT_TYPE_SHIFT (28)
-+#define EXTRA_OBJECT_TYPE_MASK ((0x0f) << EXTRA_OBJECT_TYPE_SHIFT)
-+
-+static void yaffs_dump_packed_tags2_tags_only(
-+ const struct yaffs_packed_tags2_tags_only *ptt)
-+{
-+ yaffs_trace(YAFFS_TRACE_MTD,
-+ "packed tags obj %d chunk %d byte %d seq %d",
-+ ptt->obj_id, ptt->chunk_id, ptt->n_bytes, ptt->seq_number);
-+}
-+
-+static void yaffs_dump_packed_tags2(const struct yaffs_packed_tags2 *pt)
-+{
-+ yaffs_dump_packed_tags2_tags_only(&pt->t);
-+}
-+
-+static void yaffs_dump_tags2(const struct yaffs_ext_tags *t)
-+{
-+ yaffs_trace(YAFFS_TRACE_MTD,
-+ "ext.tags eccres %d blkbad %d chused %d obj %d chunk%d byte %d del %d ser %d seq %d",
-+ t->ecc_result, t->block_bad, t->chunk_used, t->obj_id,
-+ t->chunk_id, t->n_bytes, t->is_deleted, t->serial_number,
-+ t->seq_number);
-+
-+}
-+
-+static int yaffs_check_tags_extra_packable(const struct yaffs_ext_tags *t)
-+{
-+ if (t->chunk_id != 0 || !t->extra_available)
-+ return 0;
-+
-+ /* Check if the file size is too long to store */
-+ if (t->extra_obj_type == YAFFS_OBJECT_TYPE_FILE &&
-+ (t->extra_file_size >> 31) != 0)
-+ return 0;
-+ return 1;
-+}
-+
-+void yaffs_pack_tags2_tags_only(struct yaffs_packed_tags2_tags_only *ptt,
-+ const struct yaffs_ext_tags *t)
-+{
-+ ptt->chunk_id = t->chunk_id;
-+ ptt->seq_number = t->seq_number;
-+ ptt->n_bytes = t->n_bytes;
-+ ptt->obj_id = t->obj_id;
-+
-+ /* Only store extra tags for object headers.
-+ * If it is a file then only store if the file size is short\
-+ * enough to fit.
-+ */
-+ if (yaffs_check_tags_extra_packable(t)) {
-+ /* Store the extra header info instead */
-+ /* We save the parent object in the chunk_id */
-+ ptt->chunk_id = EXTRA_HEADER_INFO_FLAG | t->extra_parent_id;
-+ if (t->extra_is_shrink)
-+ ptt->chunk_id |= EXTRA_SHRINK_FLAG;
-+ if (t->extra_shadows)
-+ ptt->chunk_id |= EXTRA_SHADOWS_FLAG;
-+
-+ ptt->obj_id &= ~EXTRA_OBJECT_TYPE_MASK;
-+ ptt->obj_id |= (t->extra_obj_type << EXTRA_OBJECT_TYPE_SHIFT);
-+
-+ if (t->extra_obj_type == YAFFS_OBJECT_TYPE_HARDLINK)
-+ ptt->n_bytes = t->extra_equiv_id;
-+ else if (t->extra_obj_type == YAFFS_OBJECT_TYPE_FILE)
-+ ptt->n_bytes = (unsigned) t->extra_file_size;
-+ else
-+ ptt->n_bytes = 0;
-+ }
-+
-+ yaffs_dump_packed_tags2_tags_only(ptt);
-+ yaffs_dump_tags2(t);
-+}
-+
-+void yaffs_pack_tags2(struct yaffs_packed_tags2 *pt,
-+ const struct yaffs_ext_tags *t, int tags_ecc)
-+{
-+ yaffs_pack_tags2_tags_only(&pt->t, t);
-+
-+ if (tags_ecc)
-+ yaffs_ecc_calc_other((unsigned char *)&pt->t,
-+ sizeof(struct yaffs_packed_tags2_tags_only),
-+ &pt->ecc);
-+}
-+
-+void yaffs_unpack_tags2_tags_only(struct yaffs_ext_tags *t,
-+ struct yaffs_packed_tags2_tags_only *ptt)
-+{
-+ memset(t, 0, sizeof(struct yaffs_ext_tags));
-+
-+ if (ptt->seq_number == 0xffffffff)
-+ return;
-+
-+ t->block_bad = 0;
-+ t->chunk_used = 1;
-+ t->obj_id = ptt->obj_id;
-+ t->chunk_id = ptt->chunk_id;
-+ t->n_bytes = ptt->n_bytes;
-+ t->is_deleted = 0;
-+ t->serial_number = 0;
-+ t->seq_number = ptt->seq_number;
-+
-+ /* Do extra header info stuff */
-+ if (ptt->chunk_id & EXTRA_HEADER_INFO_FLAG) {
-+ t->chunk_id = 0;
-+ t->n_bytes = 0;
-+
-+ t->extra_available = 1;
-+ t->extra_parent_id = ptt->chunk_id & (~(ALL_EXTRA_FLAGS));
-+ t->extra_is_shrink = ptt->chunk_id & EXTRA_SHRINK_FLAG ? 1 : 0;
-+ t->extra_shadows = ptt->chunk_id & EXTRA_SHADOWS_FLAG ? 1 : 0;
-+ t->extra_obj_type = ptt->obj_id >> EXTRA_OBJECT_TYPE_SHIFT;
-+ t->obj_id &= ~EXTRA_OBJECT_TYPE_MASK;
-+
-+ if (t->extra_obj_type == YAFFS_OBJECT_TYPE_HARDLINK)
-+ t->extra_equiv_id = ptt->n_bytes;
-+ else
-+ t->extra_file_size = ptt->n_bytes;
-+ }
-+ yaffs_dump_packed_tags2_tags_only(ptt);
-+ yaffs_dump_tags2(t);
-+}
-+
-+void yaffs_unpack_tags2(struct yaffs_ext_tags *t, struct yaffs_packed_tags2 *pt,
-+ int tags_ecc)
-+{
-+ enum yaffs_ecc_result ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
-+
-+ if (pt->t.seq_number != 0xffffffff && tags_ecc) {
-+ /* Chunk is in use and we need to do ECC */
-+
-+ struct yaffs_ecc_other ecc;
-+ int result;
-+ yaffs_ecc_calc_other((unsigned char *)&pt->t,
-+ sizeof(struct yaffs_packed_tags2_tags_only),
-+ &ecc);
-+ result =
-+ yaffs_ecc_correct_other((unsigned char *)&pt->t,
-+ sizeof(struct yaffs_packed_tags2_tags_only),
-+ &pt->ecc, &ecc);
-+ switch (result) {
-+ case 0:
-+ ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
-+ break;
-+ case 1:
-+ ecc_result = YAFFS_ECC_RESULT_FIXED;
-+ break;
-+ case -1:
-+ ecc_result = YAFFS_ECC_RESULT_UNFIXED;
-+ break;
-+ default:
-+ ecc_result = YAFFS_ECC_RESULT_UNKNOWN;
-+ }
-+ }
-+ yaffs_unpack_tags2_tags_only(t, &pt->t);
-+
-+ t->ecc_result = ecc_result;
-+
-+ yaffs_dump_packed_tags2(pt);
-+ yaffs_dump_tags2(t);
-+}
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_packedtags2.h linux-3.18.14/fs/yaffs2/yaffs_packedtags2.h
---- linux-3.18.14.orig/fs/yaffs2/yaffs_packedtags2.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_packedtags2.h 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,47 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+/* This is used to pack YAFFS2 tags, not YAFFS1tags. */
-+
-+#ifndef __YAFFS_PACKEDTAGS2_H__
-+#define __YAFFS_PACKEDTAGS2_H__
-+
-+#include "yaffs_guts.h"
-+#include "yaffs_ecc.h"
-+
-+struct yaffs_packed_tags2_tags_only {
-+ unsigned seq_number;
-+ unsigned obj_id;
-+ unsigned chunk_id;
-+ unsigned n_bytes;
-+};
-+
-+struct yaffs_packed_tags2 {
-+ struct yaffs_packed_tags2_tags_only t;
-+ struct yaffs_ecc_other ecc;
-+};
-+
-+/* Full packed tags with ECC, used for oob tags */
-+void yaffs_pack_tags2(struct yaffs_packed_tags2 *pt,
-+ const struct yaffs_ext_tags *t, int tags_ecc);
-+void yaffs_unpack_tags2(struct yaffs_ext_tags *t, struct yaffs_packed_tags2 *pt,
-+ int tags_ecc);
-+
-+/* Only the tags part (no ECC for use with inband tags */
-+void yaffs_pack_tags2_tags_only(struct yaffs_packed_tags2_tags_only *pt,
-+ const struct yaffs_ext_tags *t);
-+void yaffs_unpack_tags2_tags_only(struct yaffs_ext_tags *t,
-+ struct yaffs_packed_tags2_tags_only *pt);
-+#endif
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_summary.c linux-3.18.14/fs/yaffs2/yaffs_summary.c
---- linux-3.18.14.orig/fs/yaffs2/yaffs_summary.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_summary.c 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,312 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+/* Summaries write the useful part of the tags for the chunks in a block into an
-+ * an array which is written to the last n chunks of the block.
-+ * Reading the summaries gives all the tags for the block in one read. Much
-+ * faster.
-+ *
-+ * Chunks holding summaries are marked with tags making it look like
-+ * they are part of a fake file.
-+ *
-+ * The summary could also be used during gc.
-+ *
-+ */
-+
-+#include "yaffs_summary.h"
-+#include "yaffs_packedtags2.h"
-+#include "yaffs_nand.h"
-+#include "yaffs_getblockinfo.h"
-+#include "yaffs_bitmap.h"
-+
-+/*
-+ * The summary is built up in an array of summary tags.
-+ * This gets written to the last one or two (maybe more) chunks in a block.
-+ * A summary header is written as the first part of each chunk of summary data.
-+ * The summary header must match or the summary is rejected.
-+ */
-+
-+/* Summary tags don't need the sequence number because that is redundant. */
-+struct yaffs_summary_tags {
-+ unsigned obj_id;
-+ unsigned chunk_id;
-+ unsigned n_bytes;
-+};
-+
-+/* Summary header */
-+struct yaffs_summary_header {
-+ unsigned version; /* Must match current version */
-+ unsigned block; /* Must be this block */
-+ unsigned seq; /* Must be this sequence number */
-+ unsigned sum; /* Just add up all the bytes in the tags */
-+};
-+
-+
-+static void yaffs_summary_clear(struct yaffs_dev *dev)
-+{
-+ if (!dev->sum_tags)
-+ return;
-+ memset(dev->sum_tags, 0, dev->chunks_per_summary *
-+ sizeof(struct yaffs_summary_tags));
-+}
-+
-+
-+void yaffs_summary_deinit(struct yaffs_dev *dev)
-+{
-+ kfree(dev->sum_tags);
-+ dev->sum_tags = NULL;
-+ kfree(dev->gc_sum_tags);
-+ dev->gc_sum_tags = NULL;
-+ dev->chunks_per_summary = 0;
-+}
-+
-+int yaffs_summary_init(struct yaffs_dev *dev)
-+{
-+ int sum_bytes;
-+ int chunks_used; /* Number of chunks used by summary */
-+ int sum_tags_bytes;
-+
-+ sum_bytes = dev->param.chunks_per_block *
-+ sizeof(struct yaffs_summary_tags);
-+
-+ chunks_used = (sum_bytes + dev->data_bytes_per_chunk - 1)/
-+ (dev->data_bytes_per_chunk -
-+ sizeof(struct yaffs_summary_header));
-+
-+ dev->chunks_per_summary = dev->param.chunks_per_block - chunks_used;
-+ sum_tags_bytes = sizeof(struct yaffs_summary_tags) *
-+ dev->chunks_per_summary;
-+ dev->sum_tags = kmalloc(sum_tags_bytes, GFP_NOFS);
-+ dev->gc_sum_tags = kmalloc(sum_tags_bytes, GFP_NOFS);
-+ if (!dev->sum_tags || !dev->gc_sum_tags) {
-+ yaffs_summary_deinit(dev);
-+ return YAFFS_FAIL;
-+ }
-+
-+ yaffs_summary_clear(dev);
-+
-+ return YAFFS_OK;
-+}
-+
-+static unsigned yaffs_summary_sum(struct yaffs_dev *dev)
-+{
-+ u8 *sum_buffer = (u8 *)dev->sum_tags;
-+ int i;
-+ unsigned sum = 0;
-+
-+ i = sizeof(struct yaffs_summary_tags) *
-+ dev->chunks_per_summary;
-+ while (i > 0) {
-+ sum += *sum_buffer;
-+ sum_buffer++;
-+ i--;
-+ }
-+
-+ return sum;
-+}
-+
-+static int yaffs_summary_write(struct yaffs_dev *dev, int blk)
-+{
-+ struct yaffs_ext_tags tags;
-+ u8 *buffer;
-+ u8 *sum_buffer = (u8 *)dev->sum_tags;
-+ int n_bytes;
-+ int chunk_in_nand;
-+ int chunk_in_block;
-+ int result;
-+ int this_tx;
-+ struct yaffs_summary_header hdr;
-+ int sum_bytes_per_chunk = dev->data_bytes_per_chunk - sizeof(hdr);
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, blk);
-+
-+ buffer = yaffs_get_temp_buffer(dev);
-+ n_bytes = sizeof(struct yaffs_summary_tags) *
-+ dev->chunks_per_summary;
-+ memset(&tags, 0, sizeof(struct yaffs_ext_tags));
-+ tags.obj_id = YAFFS_OBJECTID_SUMMARY;
-+ tags.chunk_id = 1;
-+ chunk_in_block = dev->chunks_per_summary;
-+ chunk_in_nand = dev->alloc_block * dev->param.chunks_per_block +
-+ dev->chunks_per_summary;
-+ hdr.version = YAFFS_SUMMARY_VERSION;
-+ hdr.block = blk;
-+ hdr.seq = bi->seq_number;
-+ hdr.sum = yaffs_summary_sum(dev);
-+
-+ do {
-+ this_tx = n_bytes;
-+ if (this_tx > sum_bytes_per_chunk)
-+ this_tx = sum_bytes_per_chunk;
-+ memcpy(buffer, &hdr, sizeof(hdr));
-+ memcpy(buffer + sizeof(hdr), sum_buffer, this_tx);
-+ tags.n_bytes = this_tx + sizeof(hdr);
-+ result = yaffs_wr_chunk_tags_nand(dev, chunk_in_nand,
-+ buffer, &tags);
-+
-+ if (result != YAFFS_OK)
-+ break;
-+ yaffs_set_chunk_bit(dev, blk, chunk_in_block);
-+ bi->pages_in_use++;
-+ dev->n_free_chunks--;
-+
-+ n_bytes -= this_tx;
-+ sum_buffer += this_tx;
-+ chunk_in_nand++;
-+ chunk_in_block++;
-+ tags.chunk_id++;
-+ } while (result == YAFFS_OK && n_bytes > 0);
-+ yaffs_release_temp_buffer(dev, buffer);
-+
-+
-+ if (result == YAFFS_OK)
-+ bi->has_summary = 1;
-+
-+
-+ return result;
-+}
-+
-+int yaffs_summary_read(struct yaffs_dev *dev,
-+ struct yaffs_summary_tags *st,
-+ int blk)
-+{
-+ struct yaffs_ext_tags tags;
-+ u8 *buffer;
-+ u8 *sum_buffer = (u8 *)st;
-+ int n_bytes;
-+ int chunk_id;
-+ int chunk_in_nand;
-+ int chunk_in_block;
-+ int result;
-+ int this_tx;
-+ struct yaffs_summary_header hdr;
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, blk);
-+ int sum_bytes_per_chunk = dev->data_bytes_per_chunk - sizeof(hdr);
-+ int sum_tags_bytes;
-+
-+ sum_tags_bytes = sizeof(struct yaffs_summary_tags) *
-+ dev->chunks_per_summary;
-+ buffer = yaffs_get_temp_buffer(dev);
-+ n_bytes = sizeof(struct yaffs_summary_tags) * dev->chunks_per_summary;
-+ chunk_in_block = dev->chunks_per_summary;
-+ chunk_in_nand = blk * dev->param.chunks_per_block +
-+ dev->chunks_per_summary;
-+ chunk_id = 1;
-+ do {
-+ this_tx = n_bytes;
-+ if (this_tx > sum_bytes_per_chunk)
-+ this_tx = sum_bytes_per_chunk;
-+ result = yaffs_rd_chunk_tags_nand(dev, chunk_in_nand,
-+ buffer, &tags);
-+
-+ if (tags.chunk_id != chunk_id ||
-+ tags.obj_id != YAFFS_OBJECTID_SUMMARY ||
-+ tags.chunk_used == 0 ||
-+ tags.ecc_result > YAFFS_ECC_RESULT_FIXED ||
-+ tags.n_bytes != (this_tx + sizeof(hdr)))
-+ result = YAFFS_FAIL;
-+ if (result != YAFFS_OK)
-+ break;
-+
-+ if (st == dev->sum_tags) {
-+ /* If we're scanning then update the block info */
-+ yaffs_set_chunk_bit(dev, blk, chunk_in_block);
-+ bi->pages_in_use++;
-+ }
-+ memcpy(&hdr, buffer, sizeof(hdr));
-+ memcpy(sum_buffer, buffer + sizeof(hdr), this_tx);
-+ n_bytes -= this_tx;
-+ sum_buffer += this_tx;
-+ chunk_in_nand++;
-+ chunk_in_block++;
-+ chunk_id++;
-+ } while (result == YAFFS_OK && n_bytes > 0);
-+ yaffs_release_temp_buffer(dev, buffer);
-+
-+ if (result == YAFFS_OK) {
-+ /* Verify header */
-+ if (hdr.version != YAFFS_SUMMARY_VERSION ||
-+ hdr.seq != bi->seq_number ||
-+ hdr.sum != yaffs_summary_sum(dev))
-+ result = YAFFS_FAIL;
-+ }
-+
-+ if (st == dev->sum_tags && result == YAFFS_OK)
-+ bi->has_summary = 1;
-+
-+ return result;
-+}
-+
-+int yaffs_summary_add(struct yaffs_dev *dev,
-+ struct yaffs_ext_tags *tags,
-+ int chunk_in_nand)
-+{
-+ struct yaffs_packed_tags2_tags_only tags_only;
-+ struct yaffs_summary_tags *sum_tags;
-+ int block_in_nand = chunk_in_nand / dev->param.chunks_per_block;
-+ int chunk_in_block = chunk_in_nand % dev->param.chunks_per_block;
-+
-+ if (!dev->sum_tags)
-+ return YAFFS_OK;
-+
-+ if (chunk_in_block >= 0 && chunk_in_block < dev->chunks_per_summary) {
-+ yaffs_pack_tags2_tags_only(&tags_only, tags);
-+ sum_tags = &dev->sum_tags[chunk_in_block];
-+ sum_tags->chunk_id = tags_only.chunk_id;
-+ sum_tags->n_bytes = tags_only.n_bytes;
-+ sum_tags->obj_id = tags_only.obj_id;
-+
-+ if (chunk_in_block == dev->chunks_per_summary - 1) {
-+ /* Time to write out the summary */
-+ yaffs_summary_write(dev, block_in_nand);
-+ yaffs_summary_clear(dev);
-+ yaffs_skip_rest_of_block(dev);
-+ }
-+ }
-+ return YAFFS_OK;
-+}
-+
-+int yaffs_summary_fetch(struct yaffs_dev *dev,
-+ struct yaffs_ext_tags *tags,
-+ int chunk_in_block)
-+{
-+ struct yaffs_packed_tags2_tags_only tags_only;
-+ struct yaffs_summary_tags *sum_tags;
-+ if (chunk_in_block >= 0 && chunk_in_block < dev->chunks_per_summary) {
-+ sum_tags = &dev->sum_tags[chunk_in_block];
-+ tags_only.chunk_id = sum_tags->chunk_id;
-+ tags_only.n_bytes = sum_tags->n_bytes;
-+ tags_only.obj_id = sum_tags->obj_id;
-+ yaffs_unpack_tags2_tags_only(tags, &tags_only);
-+ return YAFFS_OK;
-+ }
-+ return YAFFS_FAIL;
-+}
-+
-+void yaffs_summary_gc(struct yaffs_dev *dev, int blk)
-+{
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, blk);
-+ int i;
-+
-+ if (!bi->has_summary)
-+ return;
-+
-+ for (i = dev->chunks_per_summary;
-+ i < dev->param.chunks_per_block;
-+ i++) {
-+ if (yaffs_check_chunk_bit(dev, blk, i)) {
-+ yaffs_clear_chunk_bit(dev, blk, i);
-+ bi->pages_in_use--;
-+ dev->n_free_chunks++;
-+ }
-+ }
-+}
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_summary.h linux-3.18.14/fs/yaffs2/yaffs_summary.h
---- linux-3.18.14.orig/fs/yaffs2/yaffs_summary.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_summary.h 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,37 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_SUMMARY_H__
-+#define __YAFFS_SUMMARY_H__
-+
-+#include "yaffs_packedtags2.h"
-+
-+
-+int yaffs_summary_init(struct yaffs_dev *dev);
-+void yaffs_summary_deinit(struct yaffs_dev *dev);
-+
-+int yaffs_summary_add(struct yaffs_dev *dev,
-+ struct yaffs_ext_tags *tags,
-+ int chunk_in_block);
-+int yaffs_summary_fetch(struct yaffs_dev *dev,
-+ struct yaffs_ext_tags *tags,
-+ int chunk_in_block);
-+int yaffs_summary_read(struct yaffs_dev *dev,
-+ struct yaffs_summary_tags *st,
-+ int blk);
-+void yaffs_summary_gc(struct yaffs_dev *dev, int blk);
-+
-+
-+#endif
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_tagscompat.c linux-3.18.14/fs/yaffs2/yaffs_tagscompat.c
---- linux-3.18.14.orig/fs/yaffs2/yaffs_tagscompat.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_tagscompat.c 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,381 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_guts.h"
-+#include "yaffs_tagscompat.h"
-+#include "yaffs_ecc.h"
-+#include "yaffs_getblockinfo.h"
-+#include "yaffs_trace.h"
-+
-+static void yaffs_handle_rd_data_error(struct yaffs_dev *dev, int nand_chunk);
-+
-+
-+/********** Tags ECC calculations *********/
-+
-+
-+void yaffs_calc_tags_ecc(struct yaffs_tags *tags)
-+{
-+ /* Calculate an ecc */
-+ unsigned char *b = ((union yaffs_tags_union *)tags)->as_bytes;
-+ unsigned i, j;
-+ unsigned ecc = 0;
-+ unsigned bit = 0;
-+
-+ tags->ecc = 0;
-+
-+ for (i = 0; i < 8; i++) {
-+ for (j = 1; j & 0xff; j <<= 1) {
-+ bit++;
-+ if (b[i] & j)
-+ ecc ^= bit;
-+ }
-+ }
-+ tags->ecc = ecc;
-+}
-+
-+int yaffs_check_tags_ecc(struct yaffs_tags *tags)
-+{
-+ unsigned ecc = tags->ecc;
-+
-+ yaffs_calc_tags_ecc(tags);
-+
-+ ecc ^= tags->ecc;
-+
-+ if (ecc && ecc <= 64) {
-+ /* TODO: Handle the failure better. Retire? */
-+ unsigned char *b = ((union yaffs_tags_union *)tags)->as_bytes;
-+
-+ ecc--;
-+
-+ b[ecc / 8] ^= (1 << (ecc & 7));
-+
-+ /* Now recvalc the ecc */
-+ yaffs_calc_tags_ecc(tags);
-+
-+ return 1; /* recovered error */
-+ } else if (ecc) {
-+ /* Wierd ecc failure value */
-+ /* TODO Need to do somethiong here */
-+ return -1; /* unrecovered error */
-+ }
-+ return 0;
-+}
-+
-+/********** Tags **********/
-+
-+static void yaffs_load_tags_to_spare(struct yaffs_spare *spare_ptr,
-+ struct yaffs_tags *tags_ptr)
-+{
-+ union yaffs_tags_union *tu = (union yaffs_tags_union *)tags_ptr;
-+
-+ yaffs_calc_tags_ecc(tags_ptr);
-+
-+ spare_ptr->tb0 = tu->as_bytes[0];
-+ spare_ptr->tb1 = tu->as_bytes[1];
-+ spare_ptr->tb2 = tu->as_bytes[2];
-+ spare_ptr->tb3 = tu->as_bytes[3];
-+ spare_ptr->tb4 = tu->as_bytes[4];
-+ spare_ptr->tb5 = tu->as_bytes[5];
-+ spare_ptr->tb6 = tu->as_bytes[6];
-+ spare_ptr->tb7 = tu->as_bytes[7];
-+}
-+
-+static void yaffs_get_tags_from_spare(struct yaffs_dev *dev,
-+ struct yaffs_spare *spare_ptr,
-+ struct yaffs_tags *tags_ptr)
-+{
-+ union yaffs_tags_union *tu = (union yaffs_tags_union *)tags_ptr;
-+ int result;
-+
-+ tu->as_bytes[0] = spare_ptr->tb0;
-+ tu->as_bytes[1] = spare_ptr->tb1;
-+ tu->as_bytes[2] = spare_ptr->tb2;
-+ tu->as_bytes[3] = spare_ptr->tb3;
-+ tu->as_bytes[4] = spare_ptr->tb4;
-+ tu->as_bytes[5] = spare_ptr->tb5;
-+ tu->as_bytes[6] = spare_ptr->tb6;
-+ tu->as_bytes[7] = spare_ptr->tb7;
-+
-+ result = yaffs_check_tags_ecc(tags_ptr);
-+ if (result > 0)
-+ dev->n_tags_ecc_fixed++;
-+ else if (result < 0)
-+ dev->n_tags_ecc_unfixed++;
-+}
-+
-+static void yaffs_spare_init(struct yaffs_spare *spare)
-+{
-+ memset(spare, 0xff, sizeof(struct yaffs_spare));
-+}
-+
-+static int yaffs_wr_nand(struct yaffs_dev *dev,
-+ int nand_chunk, const u8 *data,
-+ struct yaffs_spare *spare)
-+{
-+ int data_size = dev->data_bytes_per_chunk;
-+
-+ return dev->drv.drv_write_chunk_fn(dev, nand_chunk,
-+ data, data_size,
-+ (u8 *) spare, sizeof(*spare));
-+}
-+
-+static int yaffs_rd_chunk_nand(struct yaffs_dev *dev,
-+ int nand_chunk,
-+ u8 *data,
-+ struct yaffs_spare *spare,
-+ enum yaffs_ecc_result *ecc_result,
-+ int correct_errors)
-+{
-+ int ret_val;
-+ struct yaffs_spare local_spare;
-+ int data_size;
-+ int spare_size;
-+ int ecc_result1, ecc_result2;
-+ u8 calc_ecc[3];
-+
-+ if (!spare) {
-+ /* If we don't have a real spare, then we use a local one. */
-+ /* Need this for the calculation of the ecc */
-+ spare = &local_spare;
-+ }
-+ data_size = dev->data_bytes_per_chunk;
-+ spare_size = sizeof(struct yaffs_spare);
-+
-+ if (dev->param.use_nand_ecc)
-+ return dev->drv.drv_read_chunk_fn(dev, nand_chunk,
-+ data, data_size,
-+ (u8 *) spare, spare_size,
-+ ecc_result);
-+
-+
-+ /* Handle the ECC at this level. */
-+
-+ ret_val = dev->drv.drv_read_chunk_fn(dev, nand_chunk,
-+ data, data_size,
-+ (u8 *)spare, spare_size,
-+ NULL);
-+ if (!data || !correct_errors)
-+ return ret_val;
-+
-+ /* Do ECC correction if needed. */
-+ yaffs_ecc_calc(data, calc_ecc);
-+ ecc_result1 = yaffs_ecc_correct(data, spare->ecc1, calc_ecc);
-+ yaffs_ecc_calc(&data[256], calc_ecc);
-+ ecc_result2 = yaffs_ecc_correct(&data[256], spare->ecc2, calc_ecc);
-+
-+ if (ecc_result1 > 0) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "**>>yaffs ecc error fix performed on chunk %d:0",
-+ nand_chunk);
-+ dev->n_ecc_fixed++;
-+ } else if (ecc_result1 < 0) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "**>>yaffs ecc error unfixed on chunk %d:0",
-+ nand_chunk);
-+ dev->n_ecc_unfixed++;
-+ }
-+
-+ if (ecc_result2 > 0) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "**>>yaffs ecc error fix performed on chunk %d:1",
-+ nand_chunk);
-+ dev->n_ecc_fixed++;
-+ } else if (ecc_result2 < 0) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "**>>yaffs ecc error unfixed on chunk %d:1",
-+ nand_chunk);
-+ dev->n_ecc_unfixed++;
-+ }
-+
-+ if (ecc_result1 || ecc_result2) {
-+ /* We had a data problem on this page */
-+ yaffs_handle_rd_data_error(dev, nand_chunk);
-+ }
-+
-+ if (ecc_result1 < 0 || ecc_result2 < 0)
-+ *ecc_result = YAFFS_ECC_RESULT_UNFIXED;
-+ else if (ecc_result1 > 0 || ecc_result2 > 0)
-+ *ecc_result = YAFFS_ECC_RESULT_FIXED;
-+ else
-+ *ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
-+
-+ return ret_val;
-+}
-+
-+/*
-+ * Functions for robustisizing
-+ */
-+
-+static void yaffs_handle_rd_data_error(struct yaffs_dev *dev, int nand_chunk)
-+{
-+ int flash_block = nand_chunk / dev->param.chunks_per_block;
-+
-+ /* Mark the block for retirement */
-+ yaffs_get_block_info(dev, flash_block + dev->block_offset)->
-+ needs_retiring = 1;
-+ yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
-+ "**>>Block %d marked for retirement",
-+ flash_block);
-+
-+ /* TODO:
-+ * Just do a garbage collection on the affected block
-+ * then retire the block
-+ * NB recursion
-+ */
-+}
-+
-+static int yaffs_tags_compat_wr(struct yaffs_dev *dev,
-+ int nand_chunk,
-+ const u8 *data, const struct yaffs_ext_tags *ext_tags)
-+{
-+ struct yaffs_spare spare;
-+ struct yaffs_tags tags;
-+
-+ yaffs_spare_init(&spare);
-+
-+ if (ext_tags->is_deleted)
-+ spare.page_status = 0;
-+ else {
-+ tags.obj_id = ext_tags->obj_id;
-+ tags.chunk_id = ext_tags->chunk_id;
-+
-+ tags.n_bytes_lsb = ext_tags->n_bytes & (1024 - 1);
-+
-+ if (dev->data_bytes_per_chunk >= 1024)
-+ tags.n_bytes_msb = (ext_tags->n_bytes >> 10) & 3;
-+ else
-+ tags.n_bytes_msb = 3;
-+
-+ tags.serial_number = ext_tags->serial_number;
-+
-+ if (!dev->param.use_nand_ecc && data) {
-+ yaffs_ecc_calc(data, spare.ecc1);
-+ yaffs_ecc_calc(&data[256], spare.ecc2);
-+ }
-+
-+ yaffs_load_tags_to_spare(&spare, &tags);
-+ }
-+ return yaffs_wr_nand(dev, nand_chunk, data, &spare);
-+}
-+
-+static int yaffs_tags_compat_rd(struct yaffs_dev *dev,
-+ int nand_chunk,
-+ u8 *data, struct yaffs_ext_tags *ext_tags)
-+{
-+ struct yaffs_spare spare;
-+ struct yaffs_tags tags;
-+ enum yaffs_ecc_result ecc_result = YAFFS_ECC_RESULT_UNKNOWN;
-+ static struct yaffs_spare spare_ff;
-+ static int init;
-+ int deleted;
-+
-+ if (!init) {
-+ memset(&spare_ff, 0xff, sizeof(spare_ff));
-+ init = 1;
-+ }
-+
-+ if (!yaffs_rd_chunk_nand(dev, nand_chunk,
-+ data, &spare, &ecc_result, 1))
-+ return YAFFS_FAIL;
-+
-+ /* ext_tags may be NULL */
-+ if (!ext_tags)
-+ return YAFFS_OK;
-+
-+ deleted = (hweight8(spare.page_status) < 7) ? 1 : 0;
-+
-+ ext_tags->is_deleted = deleted;
-+ ext_tags->ecc_result = ecc_result;
-+ ext_tags->block_bad = 0; /* We're reading it */
-+ /* therefore it is not a bad block */
-+ ext_tags->chunk_used =
-+ memcmp(&spare_ff, &spare, sizeof(spare_ff)) ? 1 : 0;
-+
-+ if (ext_tags->chunk_used) {
-+ yaffs_get_tags_from_spare(dev, &spare, &tags);
-+ ext_tags->obj_id = tags.obj_id;
-+ ext_tags->chunk_id = tags.chunk_id;
-+ ext_tags->n_bytes = tags.n_bytes_lsb;
-+
-+ if (dev->data_bytes_per_chunk >= 1024)
-+ ext_tags->n_bytes |=
-+ (((unsigned)tags.n_bytes_msb) << 10);
-+
-+ ext_tags->serial_number = tags.serial_number;
-+ }
-+
-+ return YAFFS_OK;
-+}
-+
-+static int yaffs_tags_compat_mark_bad(struct yaffs_dev *dev, int flash_block)
-+{
-+ struct yaffs_spare spare;
-+
-+ memset(&spare, 0xff, sizeof(struct yaffs_spare));
-+
-+ spare.block_status = 'Y';
-+
-+ yaffs_wr_nand(dev, flash_block * dev->param.chunks_per_block, NULL,
-+ &spare);
-+ yaffs_wr_nand(dev, flash_block * dev->param.chunks_per_block + 1,
-+ NULL, &spare);
-+
-+ return YAFFS_OK;
-+}
-+
-+static int yaffs_tags_compat_query_block(struct yaffs_dev *dev,
-+ int block_no,
-+ enum yaffs_block_state *state,
-+ u32 *seq_number)
-+{
-+ struct yaffs_spare spare0, spare1;
-+ static struct yaffs_spare spare_ff;
-+ static int init;
-+ enum yaffs_ecc_result dummy;
-+
-+ if (!init) {
-+ memset(&spare_ff, 0xff, sizeof(spare_ff));
-+ init = 1;
-+ }
-+
-+ *seq_number = 0;
-+
-+ /* Look for bad block markers in the first two chunks */
-+ yaffs_rd_chunk_nand(dev, block_no * dev->param.chunks_per_block,
-+ NULL, &spare0, &dummy, 0);
-+ yaffs_rd_chunk_nand(dev, block_no * dev->param.chunks_per_block + 1,
-+ NULL, &spare1, &dummy, 0);
-+
-+ if (hweight8(spare0.block_status & spare1.block_status) < 7)
-+ *state = YAFFS_BLOCK_STATE_DEAD;
-+ else if (memcmp(&spare_ff, &spare0, sizeof(spare_ff)) == 0)
-+ *state = YAFFS_BLOCK_STATE_EMPTY;
-+ else
-+ *state = YAFFS_BLOCK_STATE_NEEDS_SCAN;
-+
-+ return YAFFS_OK;
-+}
-+
-+void yaffs_tags_compat_install(struct yaffs_dev *dev)
-+{
-+ if(dev->param.is_yaffs2)
-+ return;
-+ if(!dev->tagger.write_chunk_tags_fn)
-+ dev->tagger.write_chunk_tags_fn = yaffs_tags_compat_wr;
-+ if(!dev->tagger.read_chunk_tags_fn)
-+ dev->tagger.read_chunk_tags_fn = yaffs_tags_compat_rd;
-+ if(!dev->tagger.query_block_fn)
-+ dev->tagger.query_block_fn = yaffs_tags_compat_query_block;
-+ if(!dev->tagger.mark_bad_fn)
-+ dev->tagger.mark_bad_fn = yaffs_tags_compat_mark_bad;
-+}
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_tagscompat.h linux-3.18.14/fs/yaffs2/yaffs_tagscompat.h
---- linux-3.18.14.orig/fs/yaffs2/yaffs_tagscompat.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_tagscompat.h 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,44 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_TAGSCOMPAT_H__
-+#define __YAFFS_TAGSCOMPAT_H__
-+
-+
-+#include "yaffs_guts.h"
-+
-+#if 0
-+
-+
-+int yaffs_tags_compat_wr(struct yaffs_dev *dev,
-+ int nand_chunk,
-+ const u8 *data, const struct yaffs_ext_tags *tags);
-+int yaffs_tags_compat_rd(struct yaffs_dev *dev,
-+ int nand_chunk,
-+ u8 *data, struct yaffs_ext_tags *tags);
-+int yaffs_tags_compat_mark_bad(struct yaffs_dev *dev, int block_no);
-+int yaffs_tags_compat_query_block(struct yaffs_dev *dev,
-+ int block_no,
-+ enum yaffs_block_state *state,
-+ u32 *seq_number);
-+
-+#endif
-+
-+
-+void yaffs_tags_compat_install(struct yaffs_dev *dev);
-+void yaffs_calc_tags_ecc(struct yaffs_tags *tags);
-+int yaffs_check_tags_ecc(struct yaffs_tags *tags);
-+
-+#endif
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_tagsmarshall.c linux-3.18.14/fs/yaffs2/yaffs_tagsmarshall.c
---- linux-3.18.14.orig/fs/yaffs2/yaffs_tagsmarshall.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_tagsmarshall.c 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,199 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_guts.h"
-+#include "yaffs_trace.h"
-+#include "yaffs_packedtags2.h"
-+
-+static int yaffs_tags_marshall_write(struct yaffs_dev *dev,
-+ int nand_chunk, const u8 *data,
-+ const struct yaffs_ext_tags *tags)
-+{
-+ struct yaffs_packed_tags2 pt;
-+ int retval;
-+
-+ int packed_tags_size =
-+ dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt);
-+ void *packed_tags_ptr =
-+ dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt;
-+
-+ yaffs_trace(YAFFS_TRACE_MTD,
-+ "yaffs_tags_marshall_write chunk %d data %p tags %p",
-+ nand_chunk, data, tags);
-+
-+ /* For yaffs2 writing there must be both data and tags.
-+ * If we're using inband tags, then the tags are stuffed into
-+ * the end of the data buffer.
-+ */
-+ if (!data || !tags)
-+ BUG();
-+ else if (dev->param.inband_tags) {
-+ struct yaffs_packed_tags2_tags_only *pt2tp;
-+ pt2tp =
-+ (struct yaffs_packed_tags2_tags_only *)(data +
-+ dev->
-+ data_bytes_per_chunk);
-+ yaffs_pack_tags2_tags_only(pt2tp, tags);
-+ } else {
-+ yaffs_pack_tags2(&pt, tags, !dev->param.no_tags_ecc);
-+ }
-+
-+ retval = dev->drv.drv_write_chunk_fn(dev, nand_chunk,
-+ data, dev->param.total_bytes_per_chunk,
-+ (dev->param.inband_tags) ? NULL : packed_tags_ptr,
-+ (dev->param.inband_tags) ? 0 : packed_tags_size);
-+
-+ return retval;
-+}
-+
-+static int yaffs_tags_marshall_read(struct yaffs_dev *dev,
-+ int nand_chunk, u8 *data,
-+ struct yaffs_ext_tags *tags)
-+{
-+ int retval = 0;
-+ int local_data = 0;
-+ u8 spare_buffer[100];
-+ enum yaffs_ecc_result ecc_result;
-+
-+ struct yaffs_packed_tags2 pt;
-+
-+ int packed_tags_size =
-+ dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt);
-+ void *packed_tags_ptr =
-+ dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt;
-+
-+ yaffs_trace(YAFFS_TRACE_MTD,
-+ "yaffs_tags_marshall_read chunk %d data %p tags %p",
-+ nand_chunk, data, tags);
-+
-+ if (dev->param.inband_tags) {
-+ if (!data) {
-+ local_data = 1;
-+ data = yaffs_get_temp_buffer(dev);
-+ }
-+ }
-+
-+ if (dev->param.inband_tags || (data && !tags))
-+ retval = dev->drv.drv_read_chunk_fn(dev, nand_chunk,
-+ data, dev->param.total_bytes_per_chunk,
-+ NULL, 0,
-+ &ecc_result);
-+ else if (tags)
-+ retval = dev->drv.drv_read_chunk_fn(dev, nand_chunk,
-+ data, dev->param.total_bytes_per_chunk,
-+ spare_buffer, packed_tags_size,
-+ &ecc_result);
-+ else
-+ BUG();
-+
-+
-+ if (dev->param.inband_tags) {
-+ if (tags) {
-+ struct yaffs_packed_tags2_tags_only *pt2tp;
-+ pt2tp =
-+ (struct yaffs_packed_tags2_tags_only *)
-+ &data[dev->data_bytes_per_chunk];
-+ yaffs_unpack_tags2_tags_only(tags, pt2tp);
-+ }
-+ } else if (tags) {
-+ memcpy(packed_tags_ptr, spare_buffer, packed_tags_size);
-+ yaffs_unpack_tags2(tags, &pt, !dev->param.no_tags_ecc);
-+ }
-+
-+ if (local_data)
-+ yaffs_release_temp_buffer(dev, data);
-+
-+ if (tags && ecc_result == YAFFS_ECC_RESULT_UNFIXED) {
-+ tags->ecc_result = YAFFS_ECC_RESULT_UNFIXED;
-+ dev->n_ecc_unfixed++;
-+ }
-+
-+ if (tags && ecc_result == -YAFFS_ECC_RESULT_FIXED) {
-+ if (tags->ecc_result <= YAFFS_ECC_RESULT_NO_ERROR)
-+ tags->ecc_result = YAFFS_ECC_RESULT_FIXED;
-+ dev->n_ecc_fixed++;
-+ }
-+
-+ if (ecc_result < YAFFS_ECC_RESULT_UNFIXED)
-+ return YAFFS_OK;
-+ else
-+ return YAFFS_FAIL;
-+}
-+
-+static int yaffs_tags_marshall_query_block(struct yaffs_dev *dev, int block_no,
-+ enum yaffs_block_state *state,
-+ u32 *seq_number)
-+{
-+ int retval;
-+
-+ yaffs_trace(YAFFS_TRACE_MTD, "yaffs_tags_marshall_query_block %d",
-+ block_no);
-+
-+ retval = dev->drv.drv_check_bad_fn(dev, block_no);
-+
-+ if (retval== YAFFS_FAIL) {
-+ yaffs_trace(YAFFS_TRACE_MTD, "block is bad");
-+
-+ *state = YAFFS_BLOCK_STATE_DEAD;
-+ *seq_number = 0;
-+ } else {
-+ struct yaffs_ext_tags t;
-+
-+ yaffs_tags_marshall_read(dev,
-+ block_no * dev->param.chunks_per_block,
-+ NULL, &t);
-+
-+ if (t.chunk_used) {
-+ *seq_number = t.seq_number;
-+ *state = YAFFS_BLOCK_STATE_NEEDS_SCAN;
-+ } else {
-+ *seq_number = 0;
-+ *state = YAFFS_BLOCK_STATE_EMPTY;
-+ }
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_MTD,
-+ "block query returns seq %d state %d",
-+ *seq_number, *state);
-+
-+ if (retval == 0)
-+ return YAFFS_OK;
-+ else
-+ return YAFFS_FAIL;
-+}
-+
-+static int yaffs_tags_marshall_mark_bad(struct yaffs_dev *dev, int block_no)
-+{
-+ return dev->drv.drv_mark_bad_fn(dev, block_no);
-+
-+}
-+
-+
-+void yaffs_tags_marshall_install(struct yaffs_dev *dev)
-+{
-+ if (!dev->param.is_yaffs2)
-+ return;
-+
-+ if (!dev->tagger.write_chunk_tags_fn)
-+ dev->tagger.write_chunk_tags_fn = yaffs_tags_marshall_write;
-+
-+ if (!dev->tagger.read_chunk_tags_fn)
-+ dev->tagger.read_chunk_tags_fn = yaffs_tags_marshall_read;
-+
-+ if (!dev->tagger.query_block_fn)
-+ dev->tagger.query_block_fn = yaffs_tags_marshall_query_block;
-+
-+ if (!dev->tagger.mark_bad_fn)
-+ dev->tagger.mark_bad_fn = yaffs_tags_marshall_mark_bad;
-+
-+}
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_tagsmarshall.h linux-3.18.14/fs/yaffs2/yaffs_tagsmarshall.h
---- linux-3.18.14.orig/fs/yaffs2/yaffs_tagsmarshall.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_tagsmarshall.h 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,22 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_TAGSMARSHALL_H__
-+#define __YAFFS_TAGSMARSHALL_H__
-+
-+#include "yaffs_guts.h"
-+void yaffs_tags_marshall_install(struct yaffs_dev *dev);
-+
-+#endif
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_trace.h linux-3.18.14/fs/yaffs2/yaffs_trace.h
---- linux-3.18.14.orig/fs/yaffs2/yaffs_trace.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_trace.h 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,57 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YTRACE_H__
-+#define __YTRACE_H__
-+
-+extern unsigned int yaffs_trace_mask;
-+extern unsigned int yaffs_wr_attempts;
-+
-+/*
-+ * Tracing flags.
-+ * The flags masked in YAFFS_TRACE_ALWAYS are always traced.
-+ */
-+
-+#define YAFFS_TRACE_OS 0x00000002
-+#define YAFFS_TRACE_ALLOCATE 0x00000004
-+#define YAFFS_TRACE_SCAN 0x00000008
-+#define YAFFS_TRACE_BAD_BLOCKS 0x00000010
-+#define YAFFS_TRACE_ERASE 0x00000020
-+#define YAFFS_TRACE_GC 0x00000040
-+#define YAFFS_TRACE_WRITE 0x00000080
-+#define YAFFS_TRACE_TRACING 0x00000100
-+#define YAFFS_TRACE_DELETION 0x00000200
-+#define YAFFS_TRACE_BUFFERS 0x00000400
-+#define YAFFS_TRACE_NANDACCESS 0x00000800
-+#define YAFFS_TRACE_GC_DETAIL 0x00001000
-+#define YAFFS_TRACE_SCAN_DEBUG 0x00002000
-+#define YAFFS_TRACE_MTD 0x00004000
-+#define YAFFS_TRACE_CHECKPOINT 0x00008000
-+
-+#define YAFFS_TRACE_VERIFY 0x00010000
-+#define YAFFS_TRACE_VERIFY_NAND 0x00020000
-+#define YAFFS_TRACE_VERIFY_FULL 0x00040000
-+#define YAFFS_TRACE_VERIFY_ALL 0x000f0000
-+
-+#define YAFFS_TRACE_SYNC 0x00100000
-+#define YAFFS_TRACE_BACKGROUND 0x00200000
-+#define YAFFS_TRACE_LOCK 0x00400000
-+#define YAFFS_TRACE_MOUNT 0x00800000
-+
-+#define YAFFS_TRACE_ERROR 0x40000000
-+#define YAFFS_TRACE_BUG 0x80000000
-+#define YAFFS_TRACE_ALWAYS 0xf0000000
-+
-+#endif
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_verify.c linux-3.18.14/fs/yaffs2/yaffs_verify.c
---- linux-3.18.14.orig/fs/yaffs2/yaffs_verify.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_verify.c 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,529 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_verify.h"
-+#include "yaffs_trace.h"
-+#include "yaffs_bitmap.h"
-+#include "yaffs_getblockinfo.h"
-+#include "yaffs_nand.h"
-+
-+int yaffs_skip_verification(struct yaffs_dev *dev)
-+{
-+ (void) dev;
-+ return !(yaffs_trace_mask &
-+ (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL));
-+}
-+
-+static int yaffs_skip_full_verification(struct yaffs_dev *dev)
-+{
-+ (void) dev;
-+ return !(yaffs_trace_mask & (YAFFS_TRACE_VERIFY_FULL));
-+}
-+
-+static int yaffs_skip_nand_verification(struct yaffs_dev *dev)
-+{
-+ (void) dev;
-+ return !(yaffs_trace_mask & (YAFFS_TRACE_VERIFY_NAND));
-+}
-+
-+static const char * const block_state_name[] = {
-+ "Unknown",
-+ "Needs scan",
-+ "Scanning",
-+ "Empty",
-+ "Allocating",
-+ "Full",
-+ "Dirty",
-+ "Checkpoint",
-+ "Collecting",
-+ "Dead"
-+};
-+
-+void yaffs_verify_blk(struct yaffs_dev *dev, struct yaffs_block_info *bi, int n)
-+{
-+ int actually_used;
-+ int in_use;
-+
-+ if (yaffs_skip_verification(dev))
-+ return;
-+
-+ /* Report illegal runtime states */
-+ if (bi->block_state >= YAFFS_NUMBER_OF_BLOCK_STATES)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Block %d has undefined state %d",
-+ n, bi->block_state);
-+
-+ switch (bi->block_state) {
-+ case YAFFS_BLOCK_STATE_UNKNOWN:
-+ case YAFFS_BLOCK_STATE_SCANNING:
-+ case YAFFS_BLOCK_STATE_NEEDS_SCAN:
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Block %d has bad run-state %s",
-+ n, block_state_name[bi->block_state]);
-+ }
-+
-+ /* Check pages in use and soft deletions are legal */
-+
-+ actually_used = bi->pages_in_use - bi->soft_del_pages;
-+
-+ if (bi->pages_in_use < 0 ||
-+ bi->pages_in_use > dev->param.chunks_per_block ||
-+ bi->soft_del_pages < 0 ||
-+ bi->soft_del_pages > dev->param.chunks_per_block ||
-+ actually_used < 0 || actually_used > dev->param.chunks_per_block)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Block %d has illegal values pages_in_used %d soft_del_pages %d",
-+ n, bi->pages_in_use, bi->soft_del_pages);
-+
-+ /* Check chunk bitmap legal */
-+ in_use = yaffs_count_chunk_bits(dev, n);
-+ if (in_use != bi->pages_in_use)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Block %d has inconsistent values pages_in_use %d counted chunk bits %d",
-+ n, bi->pages_in_use, in_use);
-+}
-+
-+void yaffs_verify_collected_blk(struct yaffs_dev *dev,
-+ struct yaffs_block_info *bi, int n)
-+{
-+ yaffs_verify_blk(dev, bi, n);
-+
-+ /* After collection the block should be in the erased state */
-+
-+ if (bi->block_state != YAFFS_BLOCK_STATE_COLLECTING &&
-+ bi->block_state != YAFFS_BLOCK_STATE_EMPTY) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "Block %d is in state %d after gc, should be erased",
-+ n, bi->block_state);
-+ }
-+}
-+
-+void yaffs_verify_blocks(struct yaffs_dev *dev)
-+{
-+ int i;
-+ int state_count[YAFFS_NUMBER_OF_BLOCK_STATES];
-+ int illegal_states = 0;
-+
-+ if (yaffs_skip_verification(dev))
-+ return;
-+
-+ memset(state_count, 0, sizeof(state_count));
-+
-+ for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, i);
-+ yaffs_verify_blk(dev, bi, i);
-+
-+ if (bi->block_state < YAFFS_NUMBER_OF_BLOCK_STATES)
-+ state_count[bi->block_state]++;
-+ else
-+ illegal_states++;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_VERIFY, "Block summary");
-+
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "%d blocks have illegal states",
-+ illegal_states);
-+ if (state_count[YAFFS_BLOCK_STATE_ALLOCATING] > 1)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Too many allocating blocks");
-+
-+ for (i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "%s %d blocks",
-+ block_state_name[i], state_count[i]);
-+
-+ if (dev->blocks_in_checkpt != state_count[YAFFS_BLOCK_STATE_CHECKPOINT])
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Checkpoint block count wrong dev %d count %d",
-+ dev->blocks_in_checkpt,
-+ state_count[YAFFS_BLOCK_STATE_CHECKPOINT]);
-+
-+ if (dev->n_erased_blocks != state_count[YAFFS_BLOCK_STATE_EMPTY])
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Erased block count wrong dev %d count %d",
-+ dev->n_erased_blocks,
-+ state_count[YAFFS_BLOCK_STATE_EMPTY]);
-+
-+ if (state_count[YAFFS_BLOCK_STATE_COLLECTING] > 1)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Too many collecting blocks %d (max is 1)",
-+ state_count[YAFFS_BLOCK_STATE_COLLECTING]);
-+}
-+
-+/*
-+ * Verify the object header. oh must be valid, but obj and tags may be NULL in
-+ * which case those tests will not be performed.
-+ */
-+void yaffs_verify_oh(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh,
-+ struct yaffs_ext_tags *tags, int parent_check)
-+{
-+ if (obj && yaffs_skip_verification(obj->my_dev))
-+ return;
-+
-+ if (!(tags && obj && oh)) {
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Verifying object header tags %p obj %p oh %p",
-+ tags, obj, oh);
-+ return;
-+ }
-+
-+ if (oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN ||
-+ oh->type > YAFFS_OBJECT_TYPE_MAX)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d header type is illegal value 0x%x",
-+ tags->obj_id, oh->type);
-+
-+ if (tags->obj_id != obj->obj_id)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d header mismatch obj_id %d",
-+ tags->obj_id, obj->obj_id);
-+
-+ /*
-+ * Check that the object's parent ids match if parent_check requested.
-+ *
-+ * Tests do not apply to the root object.
-+ */
-+
-+ if (parent_check && tags->obj_id > 1 && !obj->parent)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d header mismatch parent_id %d obj->parent is NULL",
-+ tags->obj_id, oh->parent_obj_id);
-+
-+ if (parent_check && obj->parent &&
-+ oh->parent_obj_id != obj->parent->obj_id &&
-+ (oh->parent_obj_id != YAFFS_OBJECTID_UNLINKED ||
-+ obj->parent->obj_id != YAFFS_OBJECTID_DELETED))
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d header mismatch parent_id %d parent_obj_id %d",
-+ tags->obj_id, oh->parent_obj_id,
-+ obj->parent->obj_id);
-+
-+ if (tags->obj_id > 1 && oh->name[0] == 0) /* Null name */
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d header name is NULL",
-+ obj->obj_id);
-+
-+ if (tags->obj_id > 1 && ((u8) (oh->name[0])) == 0xff) /* Junk name */
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d header name is 0xff",
-+ obj->obj_id);
-+}
-+
-+void yaffs_verify_file(struct yaffs_obj *obj)
-+{
-+ u32 x;
-+ int required_depth;
-+ int actual_depth;
-+ int last_chunk;
-+ u32 offset_in_chunk;
-+ u32 the_chunk;
-+
-+ u32 i;
-+ struct yaffs_dev *dev;
-+ struct yaffs_ext_tags tags;
-+ struct yaffs_tnode *tn;
-+ u32 obj_id;
-+
-+ if (!obj)
-+ return;
-+
-+ if (yaffs_skip_verification(obj->my_dev))
-+ return;
-+
-+ dev = obj->my_dev;
-+ obj_id = obj->obj_id;
-+
-+
-+ /* Check file size is consistent with tnode depth */
-+ yaffs_addr_to_chunk(dev, obj->variant.file_variant.file_size,
-+ &last_chunk, &offset_in_chunk);
-+ last_chunk++;
-+ x = last_chunk >> YAFFS_TNODES_LEVEL0_BITS;
-+ required_depth = 0;
-+ while (x > 0) {
-+ x >>= YAFFS_TNODES_INTERNAL_BITS;
-+ required_depth++;
-+ }
-+
-+ actual_depth = obj->variant.file_variant.top_level;
-+
-+ /* Check that the chunks in the tnode tree are all correct.
-+ * We do this by scanning through the tnode tree and
-+ * checking the tags for every chunk match.
-+ */
-+
-+ if (yaffs_skip_nand_verification(dev))
-+ return;
-+
-+ for (i = 1; i <= last_chunk; i++) {
-+ tn = yaffs_find_tnode_0(dev, &obj->variant.file_variant, i);
-+
-+ if (!tn)
-+ continue;
-+
-+ the_chunk = yaffs_get_group_base(dev, tn, i);
-+ if (the_chunk > 0) {
-+ yaffs_rd_chunk_tags_nand(dev, the_chunk, NULL,
-+ &tags);
-+ if (tags.obj_id != obj_id || tags.chunk_id != i)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Object %d chunk_id %d NAND mismatch chunk %d tags (%d:%d)",
-+ obj_id, i, the_chunk,
-+ tags.obj_id, tags.chunk_id);
-+ }
-+ }
-+}
-+
-+void yaffs_verify_link(struct yaffs_obj *obj)
-+{
-+ if (obj && yaffs_skip_verification(obj->my_dev))
-+ return;
-+
-+ /* Verify sane equivalent object */
-+}
-+
-+void yaffs_verify_symlink(struct yaffs_obj *obj)
-+{
-+ if (obj && yaffs_skip_verification(obj->my_dev))
-+ return;
-+
-+ /* Verify symlink string */
-+}
-+
-+void yaffs_verify_special(struct yaffs_obj *obj)
-+{
-+ if (obj && yaffs_skip_verification(obj->my_dev))
-+ return;
-+}
-+
-+void yaffs_verify_obj(struct yaffs_obj *obj)
-+{
-+ struct yaffs_dev *dev;
-+ u32 chunk_min;
-+ u32 chunk_max;
-+ u32 chunk_id_ok;
-+ u32 chunk_in_range;
-+ u32 chunk_wrongly_deleted;
-+ u32 chunk_valid;
-+
-+ if (!obj)
-+ return;
-+
-+ if (obj->being_created)
-+ return;
-+
-+ dev = obj->my_dev;
-+
-+ if (yaffs_skip_verification(dev))
-+ return;
-+
-+ /* Check sane object header chunk */
-+
-+ chunk_min = dev->internal_start_block * dev->param.chunks_per_block;
-+ chunk_max =
-+ (dev->internal_end_block + 1) * dev->param.chunks_per_block - 1;
-+
-+ chunk_in_range = (((unsigned)(obj->hdr_chunk)) >= chunk_min &&
-+ ((unsigned)(obj->hdr_chunk)) <= chunk_max);
-+ chunk_id_ok = chunk_in_range || (obj->hdr_chunk == 0);
-+ chunk_valid = chunk_in_range &&
-+ yaffs_check_chunk_bit(dev,
-+ obj->hdr_chunk / dev->param.chunks_per_block,
-+ obj->hdr_chunk % dev->param.chunks_per_block);
-+ chunk_wrongly_deleted = chunk_in_range && !chunk_valid;
-+
-+ if (!obj->fake && (!chunk_id_ok || chunk_wrongly_deleted))
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d has chunk_id %d %s %s",
-+ obj->obj_id, obj->hdr_chunk,
-+ chunk_id_ok ? "" : ",out of range",
-+ chunk_wrongly_deleted ? ",marked as deleted" : "");
-+
-+ if (chunk_valid && !yaffs_skip_nand_verification(dev)) {
-+ struct yaffs_ext_tags tags;
-+ struct yaffs_obj_hdr *oh;
-+ u8 *buffer = yaffs_get_temp_buffer(dev);
-+
-+ oh = (struct yaffs_obj_hdr *)buffer;
-+
-+ yaffs_rd_chunk_tags_nand(dev, obj->hdr_chunk, buffer, &tags);
-+
-+ yaffs_verify_oh(obj, oh, &tags, 1);
-+
-+ yaffs_release_temp_buffer(dev, buffer);
-+ }
-+
-+ /* Verify it has a parent */
-+ if (obj && !obj->fake && (!obj->parent || obj->parent->my_dev != dev)) {
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d has parent pointer %p which does not look like an object",
-+ obj->obj_id, obj->parent);
-+ }
-+
-+ /* Verify parent is a directory */
-+ if (obj->parent &&
-+ obj->parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d's parent is not a directory (type %d)",
-+ obj->obj_id, obj->parent->variant_type);
-+ }
-+
-+ switch (obj->variant_type) {
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ yaffs_verify_file(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ yaffs_verify_symlink(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ yaffs_verify_dir(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ yaffs_verify_link(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ yaffs_verify_special(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ default:
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d has illegaltype %d",
-+ obj->obj_id, obj->variant_type);
-+ break;
-+ }
-+}
-+
-+void yaffs_verify_objects(struct yaffs_dev *dev)
-+{
-+ struct yaffs_obj *obj;
-+ int i;
-+ struct list_head *lh;
-+
-+ if (yaffs_skip_verification(dev))
-+ return;
-+
-+ /* Iterate through the objects in each hash entry */
-+
-+ for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
-+ list_for_each(lh, &dev->obj_bucket[i].list) {
-+ obj = list_entry(lh, struct yaffs_obj, hash_link);
-+ yaffs_verify_obj(obj);
-+ }
-+ }
-+}
-+
-+void yaffs_verify_obj_in_dir(struct yaffs_obj *obj)
-+{
-+ struct list_head *lh;
-+ struct yaffs_obj *list_obj;
-+ int count = 0;
-+
-+ if (!obj) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "No object to verify");
-+ BUG();
-+ return;
-+ }
-+
-+ if (yaffs_skip_verification(obj->my_dev))
-+ return;
-+
-+ if (!obj->parent) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "Object does not have parent");
-+ BUG();
-+ return;
-+ }
-+
-+ if (obj->parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "Parent is not directory");
-+ BUG();
-+ }
-+
-+ /* Iterate through the objects in each hash entry */
-+
-+ list_for_each(lh, &obj->parent->variant.dir_variant.children) {
-+ list_obj = list_entry(lh, struct yaffs_obj, siblings);
-+ yaffs_verify_obj(list_obj);
-+ if (obj == list_obj)
-+ count++;
-+ }
-+
-+ if (count != 1) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "Object in directory %d times",
-+ count);
-+ BUG();
-+ }
-+}
-+
-+void yaffs_verify_dir(struct yaffs_obj *directory)
-+{
-+ struct list_head *lh;
-+ struct yaffs_obj *list_obj;
-+
-+ if (!directory) {
-+ BUG();
-+ return;
-+ }
-+
-+ if (yaffs_skip_full_verification(directory->my_dev))
-+ return;
-+
-+ if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "Directory has wrong type: %d",
-+ directory->variant_type);
-+ BUG();
-+ }
-+
-+ /* Iterate through the objects in each hash entry */
-+
-+ list_for_each(lh, &directory->variant.dir_variant.children) {
-+ list_obj = list_entry(lh, struct yaffs_obj, siblings);
-+ if (list_obj->parent != directory) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "Object in directory list has wrong parent %p",
-+ list_obj->parent);
-+ BUG();
-+ }
-+ yaffs_verify_obj_in_dir(list_obj);
-+ }
-+}
-+
-+static int yaffs_free_verification_failures;
-+
-+void yaffs_verify_free_chunks(struct yaffs_dev *dev)
-+{
-+ int counted;
-+ int difference;
-+
-+ if (yaffs_skip_verification(dev))
-+ return;
-+
-+ counted = yaffs_count_free_chunks(dev);
-+
-+ difference = dev->n_free_chunks - counted;
-+
-+ if (difference) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "Freechunks verification failure %d %d %d",
-+ dev->n_free_chunks, counted, difference);
-+ yaffs_free_verification_failures++;
-+ }
-+}
-+
-+int yaffs_verify_file_sane(struct yaffs_obj *in)
-+{
-+ (void) in;
-+ return YAFFS_OK;
-+}
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_verify.h linux-3.18.14/fs/yaffs2/yaffs_verify.h
---- linux-3.18.14.orig/fs/yaffs2/yaffs_verify.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_verify.h 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,43 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_VERIFY_H__
-+#define __YAFFS_VERIFY_H__
-+
-+#include "yaffs_guts.h"
-+
-+void yaffs_verify_blk(struct yaffs_dev *dev, struct yaffs_block_info *bi,
-+ int n);
-+void yaffs_verify_collected_blk(struct yaffs_dev *dev,
-+ struct yaffs_block_info *bi, int n);
-+void yaffs_verify_blocks(struct yaffs_dev *dev);
-+
-+void yaffs_verify_oh(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh,
-+ struct yaffs_ext_tags *tags, int parent_check);
-+void yaffs_verify_file(struct yaffs_obj *obj);
-+void yaffs_verify_link(struct yaffs_obj *obj);
-+void yaffs_verify_symlink(struct yaffs_obj *obj);
-+void yaffs_verify_special(struct yaffs_obj *obj);
-+void yaffs_verify_obj(struct yaffs_obj *obj);
-+void yaffs_verify_objects(struct yaffs_dev *dev);
-+void yaffs_verify_obj_in_dir(struct yaffs_obj *obj);
-+void yaffs_verify_dir(struct yaffs_obj *directory);
-+void yaffs_verify_free_chunks(struct yaffs_dev *dev);
-+
-+int yaffs_verify_file_sane(struct yaffs_obj *obj);
-+
-+int yaffs_skip_verification(struct yaffs_dev *dev);
-+
-+#endif
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_vfs.c linux-3.18.14/fs/yaffs2/yaffs_vfs.c
---- linux-3.18.14.orig/fs/yaffs2/yaffs_vfs.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_vfs.c 2015-06-15 18:42:09.000000000 +0200
-@@ -0,0 +1,3658 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ * Acknowledgements:
-+ * Luc van OostenRyck for numerous patches.
-+ * Nick Bane for numerous patches.
-+ * Nick Bane for 2.5/2.6 integration.
-+ * Andras Toth for mknod rdev issue.
-+ * Michael Fischer for finding the problem with inode inconsistency.
-+ * Some code bodily lifted from JFFS
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+/*
-+ *
-+ * This is the file system front-end to YAFFS that hooks it up to
-+ * the VFS.
-+ *
-+ * Special notes:
-+ * >> 2.4: sb->u.generic_sbp points to the struct yaffs_dev associated with
-+ * this superblock
-+ * >> 2.6: sb->s_fs_info points to the struct yaffs_dev associated with this
-+ * superblock
-+ * >> inode->u.generic_ip points to the associated struct yaffs_obj.
-+ */
-+
-+/*
-+ * There are two variants of the VFS glue code. This variant should compile
-+ * for any version of Linux.
-+ */
-+#include <linux/version.h>
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 10))
-+#define YAFFS_COMPILE_BACKGROUND
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23))
-+#define YAFFS_COMPILE_FREEZER
-+#endif
-+#endif
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28))
-+#define YAFFS_COMPILE_EXPORTFS
-+#endif
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 35))
-+#define YAFFS_USE_SETATTR_COPY
-+#define YAFFS_USE_TRUNCATE_SETSIZE
-+#endif
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 35))
-+#define YAFFS_HAS_EVICT_INODE
-+#endif
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
-+#define YAFFS_NEW_FOLLOW_LINK 1
-+#else
-+#define YAFFS_NEW_FOLLOW_LINK 0
-+#endif
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 6, 0))
-+#define YAFFS_HAS_WRITE_SUPER
-+#endif
-+
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
-+#include <linux/config.h>
-+#endif
-+
-+#include <linux/kernel.h>
-+#include <linux/module.h>
-+#include <linux/slab.h>
-+#include <linux/init.h>
-+#include <linux/fs.h>
-+#include <linux/proc_fs.h>
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 39))
-+#include <linux/smp_lock.h>
-+#endif
-+#include <linux/pagemap.h>
-+#include <linux/mtd/mtd.h>
-+#include <linux/interrupt.h>
-+#include <linux/string.h>
-+#include <linux/ctype.h>
-+
-+#if (YAFFS_NEW_FOLLOW_LINK == 1)
-+#include <linux/namei.h>
-+#endif
-+
-+#ifdef YAFFS_COMPILE_EXPORTFS
-+#include <linux/exportfs.h>
-+#endif
-+
-+#ifdef YAFFS_COMPILE_BACKGROUND
-+#include <linux/kthread.h>
-+#include <linux/delay.h>
-+#endif
-+#ifdef YAFFS_COMPILE_FREEZER
-+#include <linux/freezer.h>
-+#endif
-+
-+#include <asm/div64.h>
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+
-+#include <linux/statfs.h>
-+
-+#define UnlockPage(p) unlock_page(p)
-+#define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags)
-+
-+/* FIXME: use sb->s_id instead ? */
-+#define yaffs_devname(sb, buf) bdevname(sb->s_bdev, buf)
-+
-+#else
-+
-+#include <linux/locks.h>
-+#define BDEVNAME_SIZE 0
-+#define yaffs_devname(sb, buf) kdevname(sb->s_dev)
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0))
-+/* added NCB 26/5/2006 for 2.4.25-vrs2-tcl1 kernel */
-+#define __user
-+#endif
-+
-+#endif
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26))
-+#define YPROC_ROOT (&proc_root)
-+#else
-+#define YPROC_ROOT NULL
-+#endif
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26))
-+#define Y_INIT_TIMER(a) init_timer(a)
-+#else
-+#define Y_INIT_TIMER(a) init_timer_on_stack(a)
-+#endif
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 27))
-+#define YAFFS_USE_WRITE_BEGIN_END 1
-+#else
-+#define YAFFS_USE_WRITE_BEGIN_END 0
-+#endif
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 6, 0))
-+#define YAFFS_SUPER_HAS_DIRTY
-+#endif
-+
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 2, 0))
-+#define set_nlink(inode, count) do { (inode)->i_nlink = (count); } while(0)
-+#endif
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28))
-+static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size)
-+{
-+ uint64_t result = partition_size;
-+ do_div(result, block_size);
-+ return (uint32_t) result;
-+}
-+#else
-+#define YCALCBLOCKS(s, b) ((s)/(b))
-+#endif
-+
-+#include <linux/uaccess.h>
-+#include <linux/mtd/mtd.h>
-+
-+#include "yportenv.h"
-+#include "yaffs_trace.h"
-+#include "yaffs_guts.h"
-+#include "yaffs_attribs.h"
-+
-+#include "yaffs_linux.h"
-+
-+#include "yaffs_mtdif.h"
-+#include "yaffs_packedtags2.h"
-+#include "yaffs_getblockinfo.h"
-+
-+unsigned int yaffs_trace_mask =
-+ YAFFS_TRACE_BAD_BLOCKS |
-+ YAFFS_TRACE_ALWAYS |
-+ 0;
-+
-+unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS;
-+unsigned int yaffs_auto_checkpoint = 1;
-+unsigned int yaffs_gc_control = 1;
-+unsigned int yaffs_bg_enable = 1;
-+unsigned int yaffs_auto_select = 1;
-+/* Module Parameters */
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+module_param(yaffs_trace_mask, uint, 0644);
-+module_param(yaffs_wr_attempts, uint, 0644);
-+module_param(yaffs_auto_checkpoint, uint, 0644);
-+module_param(yaffs_gc_control, uint, 0644);
-+module_param(yaffs_bg_enable, uint, 0644);
-+#else
-+MODULE_PARM(yaffs_trace_mask, "i");
-+MODULE_PARM(yaffs_wr_attempts, "i");
-+MODULE_PARM(yaffs_auto_checkpoint, "i");
-+MODULE_PARM(yaffs_gc_control, "i");
-+#endif
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
-+/* use iget and read_inode */
-+#define Y_IGET(sb, inum) iget((sb), (inum))
-+
-+#else
-+/* Call local equivalent */
-+#define YAFFS_USE_OWN_IGET
-+#define Y_IGET(sb, inum) yaffs_iget((sb), (inum))
-+
-+#endif
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
-+#define yaffs_inode_to_obj_lv(iptr) ((iptr)->i_private)
-+#else
-+#define yaffs_inode_to_obj_lv(iptr) ((iptr)->u.generic_ip)
-+#endif
-+
-+#define yaffs_inode_to_obj(iptr) \
-+ ((struct yaffs_obj *)(yaffs_inode_to_obj_lv(iptr)))
-+#define yaffs_dentry_to_obj(dptr) yaffs_inode_to_obj((dptr)->d_inode)
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+#define yaffs_super_to_dev(sb) ((struct yaffs_dev *)sb->s_fs_info)
-+#else
-+#define yaffs_super_to_dev(sb) ((struct yaffs_dev *)sb->u.generic_sbp)
-+#endif
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0))
-+#define Y_CLEAR_INODE(i) clear_inode(i)
-+#else
-+#define Y_CLEAR_INODE(i) end_writeback(i)
-+#endif
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 12, 0))
-+#define YAFFS_USE_DIR_ITERATE
-+#endif
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
-+#define YAFFS_NEW_PROCFS
-+#include <linux/seq_file.h>
-+#endif
-+
-+
-+#define update_dir_time(dir) do {\
-+ (dir)->i_ctime = (dir)->i_mtime = CURRENT_TIME; \
-+ } while (0)
-+
-+static void yaffs_fill_inode_from_obj(struct inode *inode,
-+ struct yaffs_obj *obj);
-+
-+
-+static void yaffs_gross_lock(struct yaffs_dev *dev)
-+{
-+ yaffs_trace(YAFFS_TRACE_LOCK, "yaffs locking %p", current);
-+ mutex_lock(&(yaffs_dev_to_lc(dev)->gross_lock));
-+ yaffs_trace(YAFFS_TRACE_LOCK, "yaffs locked %p", current);
-+}
-+
-+static void yaffs_gross_unlock(struct yaffs_dev *dev)
-+{
-+ yaffs_trace(YAFFS_TRACE_LOCK, "yaffs unlocking %p", current);
-+ mutex_unlock(&(yaffs_dev_to_lc(dev)->gross_lock));
-+}
-+
-+
-+static int yaffs_readpage_nolock(struct file *f, struct page *pg)
-+{
-+ /* Lifted from jffs2 */
-+
-+ struct yaffs_obj *obj;
-+ unsigned char *pg_buf;
-+ int ret;
-+ loff_t pos = ((loff_t) pg->index) << PAGE_CACHE_SHIFT;
-+ struct yaffs_dev *dev;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readpage_nolock at %lld, size %08x",
-+ (long long)pos,
-+ (unsigned)PAGE_CACHE_SIZE);
-+
-+ obj = yaffs_dentry_to_obj(f->f_dentry);
-+
-+ dev = obj->my_dev;
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+ BUG_ON(!PageLocked(pg));
-+#else
-+ if (!PageLocked(pg))
-+ PAGE_BUG(pg);
-+#endif
-+
-+ pg_buf = kmap(pg);
-+ /* FIXME: Can kmap fail? */
-+
-+ yaffs_gross_lock(dev);
-+
-+ ret = yaffs_file_rd(obj, pg_buf, pos, PAGE_CACHE_SIZE);
-+
-+ yaffs_gross_unlock(dev);
-+
-+ if (ret >= 0)
-+ ret = 0;
-+
-+ if (ret) {
-+ ClearPageUptodate(pg);
-+ SetPageError(pg);
-+ } else {
-+ SetPageUptodate(pg);
-+ ClearPageError(pg);
-+ }
-+
-+ flush_dcache_page(pg);
-+ kunmap(pg);
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage_nolock done");
-+ return ret;
-+}
-+
-+static int yaffs_readpage_unlock(struct file *f, struct page *pg)
-+{
-+ int ret = yaffs_readpage_nolock(f, pg);
-+ UnlockPage(pg);
-+ return ret;
-+}
-+
-+static int yaffs_readpage(struct file *f, struct page *pg)
-+{
-+ int ret;
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage");
-+ ret = yaffs_readpage_unlock(f, pg);
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage done");
-+ return ret;
-+}
-+
-+
-+static void yaffs_set_super_dirty_val(struct yaffs_dev *dev, int val)
-+{
-+ struct yaffs_linux_context *lc = yaffs_dev_to_lc(dev);
-+
-+ if (lc)
-+ lc->dirty = val;
-+
-+# ifdef YAFFS_SUPER_HAS_DIRTY
-+ {
-+ struct super_block *sb = lc->super;
-+
-+ if (sb)
-+ sb->s_dirt = val;
-+ }
-+#endif
-+
-+}
-+
-+static void yaffs_set_super_dirty(struct yaffs_dev *dev)
-+{
-+ yaffs_set_super_dirty_val(dev, 1);
-+}
-+
-+static void yaffs_clear_super_dirty(struct yaffs_dev *dev)
-+{
-+ yaffs_set_super_dirty_val(dev, 0);
-+}
-+
-+static int yaffs_check_super_dirty(struct yaffs_dev *dev)
-+{
-+ struct yaffs_linux_context *lc = yaffs_dev_to_lc(dev);
-+
-+ if (lc && lc->dirty)
-+ return 1;
-+
-+# ifdef YAFFS_SUPER_HAS_DIRTY
-+ {
-+ struct super_block *sb = lc->super;
-+
-+ if (sb && sb->s_dirt)
-+ return 1;
-+ }
-+#endif
-+ return 0;
-+
-+}
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
-+#else
-+static int yaffs_writepage(struct page *page)
-+#endif
-+{
-+ struct yaffs_dev *dev;
-+ struct address_space *mapping = page->mapping;
-+ struct inode *inode;
-+ unsigned long end_index;
-+ char *buffer;
-+ struct yaffs_obj *obj;
-+ int n_written = 0;
-+ unsigned n_bytes;
-+ loff_t i_size;
-+
-+ if (!mapping)
-+ BUG();
-+ inode = mapping->host;
-+ if (!inode)
-+ BUG();
-+ i_size = i_size_read(inode);
-+
-+ end_index = i_size >> PAGE_CACHE_SHIFT;
-+
-+ if (page->index < end_index)
-+ n_bytes = PAGE_CACHE_SIZE;
-+ else {
-+ n_bytes = i_size & (PAGE_CACHE_SIZE - 1);
-+
-+ if (page->index > end_index || !n_bytes) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_writepage at %lld, inode size = %lld!!",
-+ ((loff_t)page->index) << PAGE_CACHE_SHIFT,
-+ inode->i_size);
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ " -> don't care!!");
-+
-+ zero_user_segment(page, 0, PAGE_CACHE_SIZE);
-+ set_page_writeback(page);
-+ unlock_page(page);
-+ end_page_writeback(page);
-+ return 0;
-+ }
-+ }
-+
-+ if (n_bytes != PAGE_CACHE_SIZE)
-+ zero_user_segment(page, n_bytes, PAGE_CACHE_SIZE);
-+
-+ get_page(page);
-+
-+ buffer = kmap(page);
-+
-+ obj = yaffs_inode_to_obj(inode);
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_writepage at %lld, size %08x",
-+ ((loff_t)page->index) << PAGE_CACHE_SHIFT, n_bytes);
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "writepag0: obj = %lld, ino = %lld",
-+ obj->variant.file_variant.file_size, inode->i_size);
-+
-+ n_written = yaffs_wr_file(obj, buffer,
-+ ((loff_t)page->index) << PAGE_CACHE_SHIFT, n_bytes, 0);
-+
-+ yaffs_set_super_dirty(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "writepag1: obj = %lld, ino = %lld",
-+ obj->variant.file_variant.file_size, inode->i_size);
-+
-+ yaffs_gross_unlock(dev);
-+
-+ kunmap(page);
-+ set_page_writeback(page);
-+ unlock_page(page);
-+ end_page_writeback(page);
-+ put_page(page);
-+
-+ return (n_written == n_bytes) ? 0 : -ENOSPC;
-+}
-+
-+/* Space holding and freeing is done to ensure we have space available for write_begin/end */
-+/* For now we just assume few parallel writes and check against a small number. */
-+/* Todo: need to do this with a counter to handle parallel reads better */
-+
-+static ssize_t yaffs_hold_space(struct file *f)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev;
-+
-+ int n_free_chunks;
-+
-+ obj = yaffs_dentry_to_obj(f->f_dentry);
-+
-+ dev = obj->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ n_free_chunks = yaffs_get_n_free_chunks(dev);
-+
-+ yaffs_gross_unlock(dev);
-+
-+ return (n_free_chunks > 20) ? 1 : 0;
-+}
-+
-+static void yaffs_release_space(struct file *f)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev;
-+
-+ obj = yaffs_dentry_to_obj(f->f_dentry);
-+
-+ dev = obj->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ yaffs_gross_unlock(dev);
-+}
-+
-+#if (YAFFS_USE_WRITE_BEGIN_END > 0)
-+static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
-+ loff_t pos, unsigned len, unsigned flags,
-+ struct page **pagep, void **fsdata)
-+{
-+ struct page *pg = NULL;
-+ pgoff_t index = pos >> PAGE_CACHE_SHIFT;
-+
-+ int ret = 0;
-+ int space_held = 0;
-+
-+ /* Get a page */
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
-+ pg = grab_cache_page_write_begin(mapping, index, flags);
-+#else
-+ pg = __grab_cache_page(mapping, index);
-+#endif
-+
-+ *pagep = pg;
-+ if (!pg) {
-+ ret = -ENOMEM;
-+ goto out;
-+ }
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "start yaffs_write_begin index %d(%x) uptodate %d",
-+ (int)index, (int)index, Page_Uptodate(pg) ? 1 : 0);
-+
-+ /* Get fs space */
-+ space_held = yaffs_hold_space(filp);
-+
-+ if (!space_held) {
-+ ret = -ENOSPC;
-+ goto out;
-+ }
-+
-+ /* Update page if required */
-+
-+ if (!Page_Uptodate(pg))
-+ ret = yaffs_readpage_nolock(filp, pg);
-+
-+ if (ret)
-+ goto out;
-+
-+ /* Happy path return */
-+ yaffs_trace(YAFFS_TRACE_OS, "end yaffs_write_begin - ok");
-+
-+ return 0;
-+
-+out:
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "end yaffs_write_begin fail returning %d", ret);
-+ if (space_held)
-+ yaffs_release_space(filp);
-+ if (pg) {
-+ unlock_page(pg);
-+ page_cache_release(pg);
-+ }
-+ return ret;
-+}
-+
-+#else
-+
-+static int yaffs_prepare_write(struct file *f, struct page *pg,
-+ unsigned offset, unsigned to)
-+{
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_prepair_write");
-+
-+ if (!Page_Uptodate(pg))
-+ return yaffs_readpage_nolock(f, pg);
-+ return 0;
-+}
-+#endif
-+
-+
-+static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
-+ loff_t * pos)
-+{
-+ struct yaffs_obj *obj;
-+ int n_written;
-+ loff_t ipos;
-+ struct inode *inode;
-+ struct yaffs_dev *dev;
-+
-+ obj = yaffs_dentry_to_obj(f->f_dentry);
-+
-+ if (!obj) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_file_write: hey obj is null!");
-+ return -EINVAL;
-+ }
-+
-+ dev = obj->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ inode = f->f_dentry->d_inode;
-+
-+ if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND)
-+ ipos = inode->i_size;
-+ else
-+ ipos = *pos;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_file_write about to write writing %u(%x) bytes to object %d at %lld",
-+ (unsigned)n, (unsigned)n, obj->obj_id, ipos);
-+
-+ n_written = yaffs_wr_file(obj, buf, ipos, n, 0);
-+
-+ yaffs_set_super_dirty(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_file_write: %d(%x) bytes written",
-+ (unsigned)n, (unsigned)n);
-+
-+ if (n_written > 0) {
-+ ipos += n_written;
-+ *pos = ipos;
-+ if (ipos > inode->i_size) {
-+ inode->i_size = ipos;
-+ inode->i_blocks = (ipos + 511) >> 9;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_file_write size updated to %lld bytes, %d blocks",
-+ ipos, (int)(inode->i_blocks));
-+ }
-+
-+ }
-+ yaffs_gross_unlock(dev);
-+ return (n_written == 0) && (n > 0) ? -ENOSPC : n_written;
-+}
-+
-+
-+#if (YAFFS_USE_WRITE_BEGIN_END > 0)
-+static int yaffs_write_end(struct file *filp, struct address_space *mapping,
-+ loff_t pos, unsigned len, unsigned copied,
-+ struct page *pg, void *fsdadata)
-+{
-+ int ret = 0;
-+ void *addr, *kva;
-+ uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1);
-+
-+ kva = kmap(pg);
-+ addr = kva + offset_into_page;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_write_end addr %p pos %lld n_bytes %d",
-+ addr, pos, copied);
-+
-+ ret = yaffs_file_write(filp, addr, copied, &pos);
-+
-+ if (ret != copied) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_write_end not same size ret %d copied %d",
-+ ret, copied);
-+ SetPageError(pg);
-+ }
-+
-+ kunmap(pg);
-+
-+ yaffs_release_space(filp);
-+ unlock_page(pg);
-+ page_cache_release(pg);
-+ return ret;
-+}
-+#else
-+
-+static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
-+ unsigned to)
-+{
-+ void *addr, *kva;
-+
-+ loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset;
-+ int n_bytes = to - offset;
-+ int n_written;
-+
-+ kva = kmap(pg);
-+ addr = kva + offset;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_commit_write addr %p pos %lld n_bytes %d",
-+ addr, pos, n_bytes);
-+
-+ n_written = yaffs_file_write(f, addr, n_bytes, &pos);
-+
-+ if (n_written != n_bytes) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_commit_write not same size n_written %d n_bytes %d",
-+ n_written, n_bytes);
-+ SetPageError(pg);
-+ }
-+ kunmap(pg);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_commit_write returning %d",
-+ n_written == n_bytes ? 0 : n_written);
-+
-+ return n_written == n_bytes ? 0 : n_written;
-+}
-+#endif
-+
-+static struct address_space_operations yaffs_file_address_operations = {
-+ .readpage = yaffs_readpage,
-+ .writepage = yaffs_writepage,
-+#if (YAFFS_USE_WRITE_BEGIN_END > 0)
-+ .write_begin = yaffs_write_begin,
-+ .write_end = yaffs_write_end,
-+#else
-+ .prepare_write = yaffs_prepare_write,
-+ .commit_write = yaffs_commit_write,
-+#endif
-+};
-+
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-+static int yaffs_file_flush(struct file *file, fl_owner_t id)
-+#else
-+static int yaffs_file_flush(struct file *file)
-+#endif
-+{
-+ struct yaffs_obj *obj = yaffs_dentry_to_obj(file->f_dentry);
-+
-+ struct yaffs_dev *dev = obj->my_dev;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_file_flush object %d (%s)",
-+ obj->obj_id,
-+ obj->dirty ? "dirty" : "clean");
-+
-+ yaffs_gross_lock(dev);
-+
-+ yaffs_flush_file(obj, 1, 0, 0);
-+
-+ yaffs_gross_unlock(dev);
-+
-+ return 0;
-+}
-+
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
-+static int yaffs_sync_object(struct file *file, loff_t start, loff_t end, int datasync)
-+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
-+static int yaffs_sync_object(struct file *file, int datasync)
-+#else
-+static int yaffs_sync_object(struct file *file, struct dentry *dentry,
-+ int datasync)
-+#endif
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev;
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
-+ struct dentry *dentry = file->f_path.dentry;
-+#endif
-+
-+ obj = yaffs_dentry_to_obj(dentry);
-+
-+ dev = obj->my_dev;
-+
-+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC,
-+ "yaffs_sync_object");
-+ yaffs_gross_lock(dev);
-+ yaffs_flush_file(obj, 1, datasync, 0);
-+ yaffs_gross_unlock(dev);
-+ return 0;
-+}
-+
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 22))
-+static const struct file_operations yaffs_file_operations = {
-+ .read = do_sync_read,
-+ .write = do_sync_write,
-+ .read_iter = generic_file_read_iter,
-+ .write_iter = generic_file_write_iter,
-+ .mmap = generic_file_mmap,
-+ .flush = yaffs_file_flush,
-+ .fsync = yaffs_sync_object,
-+ .splice_read = generic_file_splice_read,
-+ .splice_write = iter_file_splice_write,
-+ .llseek = generic_file_llseek,
-+};
-+
-+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
-+
-+static const struct file_operations yaffs_file_operations = {
-+ .read = do_sync_read,
-+ .write = do_sync_write,
-+ .aio_read = generic_file_aio_read,
-+ .aio_write = generic_file_aio_write,
-+ .mmap = generic_file_mmap,
-+ .flush = yaffs_file_flush,
-+ .fsync = yaffs_sync_object,
-+ .sendfile = generic_file_sendfile,
-+};
-+
-+#else
-+
-+static const struct file_operations yaffs_file_operations = {
-+ .read = generic_file_read,
-+ .write = generic_file_write,
-+ .mmap = generic_file_mmap,
-+ .flush = yaffs_file_flush,
-+ .fsync = yaffs_sync_object,
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+ .sendfile = generic_file_sendfile,
-+#endif
-+};
-+#endif
-+
-+
-+
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
-+static void zero_user_segment(struct page *page, unsigned start, unsigned end)
-+{
-+ void *kaddr = kmap_atomic(page, KM_USER0);
-+ memset(kaddr + start, 0, end - start);
-+ kunmap_atomic(kaddr, KM_USER0);
-+ flush_dcache_page(page);
-+}
-+#endif
-+
-+
-+static int yaffs_vfs_setsize(struct inode *inode, loff_t newsize)
-+{
-+#ifdef YAFFS_USE_TRUNCATE_SETSIZE
-+ truncate_setsize(inode, newsize);
-+ return 0;
-+#else
-+ truncate_inode_pages(&inode->i_data, newsize);
-+ return 0;
-+#endif
-+
-+}
-+
-+
-+static int yaffs_vfs_setattr(struct inode *inode, struct iattr *attr)
-+{
-+#ifdef YAFFS_USE_SETATTR_COPY
-+ setattr_copy(inode, attr);
-+ return 0;
-+#else
-+ return inode_setattr(inode, attr);
-+#endif
-+
-+}
-+
-+static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
-+{
-+ struct inode *inode = dentry->d_inode;
-+ int error = 0;
-+ struct yaffs_dev *dev;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_setattr of object %d",
-+ yaffs_inode_to_obj(inode)->obj_id);
-+#if 0
-+ /* Fail if a requested resize >= 2GB */
-+ if (attr->ia_valid & ATTR_SIZE && (attr->ia_size >> 31))
-+ error = -EINVAL;
-+#endif
-+
-+ if (error == 0)
-+ error = inode_change_ok(inode, attr);
-+ if (error == 0) {
-+ int result;
-+ if (!error) {
-+ error = yaffs_vfs_setattr(inode, attr);
-+ yaffs_trace(YAFFS_TRACE_OS, "inode_setattr called");
-+ if (attr->ia_valid & ATTR_SIZE) {
-+ yaffs_vfs_setsize(inode, attr->ia_size);
-+ inode->i_blocks = (inode->i_size + 511) >> 9;
-+ }
-+ }
-+ dev = yaffs_inode_to_obj(inode)->my_dev;
-+ if (attr->ia_valid & ATTR_SIZE) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "resize to %d(%x)",
-+ (int)(attr->ia_size),
-+ (int)(attr->ia_size));
-+ }
-+ yaffs_gross_lock(dev);
-+ result = yaffs_set_attribs(yaffs_inode_to_obj(inode), attr);
-+ if (result == YAFFS_OK) {
-+ error = 0;
-+ } else {
-+ error = -EPERM;
-+ }
-+ yaffs_gross_unlock(dev);
-+
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_setattr done returning %d", error);
-+
-+ return error;
-+}
-+
-+static int yaffs_setxattr(struct dentry *dentry, const char *name,
-+ const void *value, size_t size, int flags)
-+{
-+ struct inode *inode = dentry->d_inode;
-+ int error = 0;
-+ struct yaffs_dev *dev;
-+ struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_setxattr of object %d", obj->obj_id);
-+
-+ if (error == 0) {
-+ int result;
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+ result = yaffs_set_xattrib(obj, name, value, size, flags);
-+ if (result == YAFFS_OK)
-+ error = 0;
-+ else if (result < 0)
-+ error = result;
-+ yaffs_gross_unlock(dev);
-+
-+ }
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_setxattr done returning %d", error);
-+
-+ return error;
-+}
-+
-+static ssize_t yaffs_getxattr(struct dentry * dentry, const char *name,
-+ void *buff, size_t size)
-+{
-+ struct inode *inode = dentry->d_inode;
-+ int error = 0;
-+ struct yaffs_dev *dev;
-+ struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_getxattr \"%s\" from object %d",
-+ name, obj->obj_id);
-+
-+ if (error == 0) {
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+ error = yaffs_get_xattrib(obj, name, buff, size);
-+ yaffs_gross_unlock(dev);
-+
-+ }
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_getxattr done returning %d", error);
-+
-+ return error;
-+}
-+
-+static int yaffs_removexattr(struct dentry *dentry, const char *name)
-+{
-+ struct inode *inode = dentry->d_inode;
-+ int error = 0;
-+ struct yaffs_dev *dev;
-+ struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_removexattr of object %d", obj->obj_id);
-+
-+ if (error == 0) {
-+ int result;
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+ result = yaffs_remove_xattrib(obj, name);
-+ if (result == YAFFS_OK)
-+ error = 0;
-+ else if (result < 0)
-+ error = result;
-+ yaffs_gross_unlock(dev);
-+
-+ }
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_removexattr done returning %d", error);
-+
-+ return error;
-+}
-+
-+static ssize_t yaffs_listxattr(struct dentry * dentry, char *buff, size_t size)
-+{
-+ struct inode *inode = dentry->d_inode;
-+ int error = 0;
-+ struct yaffs_dev *dev;
-+ struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_listxattr of object %d", obj->obj_id);
-+
-+ if (error == 0) {
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+ error = yaffs_list_xattrib(obj, buff, size);
-+ yaffs_gross_unlock(dev);
-+
-+ }
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_listxattr done returning %d", error);
-+
-+ return error;
-+}
-+
-+
-+static const struct inode_operations yaffs_file_inode_operations = {
-+ .setattr = yaffs_setattr,
-+ .setxattr = yaffs_setxattr,
-+ .getxattr = yaffs_getxattr,
-+ .listxattr = yaffs_listxattr,
-+ .removexattr = yaffs_removexattr,
-+};
-+
-+
-+static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
-+ int buflen)
-+{
-+ unsigned char *alias;
-+ int ret;
-+
-+ struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry));
-+
-+ yaffs_gross_unlock(dev);
-+
-+ if (!alias)
-+ return -ENOMEM;
-+
-+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 15, 0)
-+ ret = vfs_readlink(dentry, buffer, buflen, alias);
-+#else
-+ ret = readlink_copy(buffer, buflen, alias);
-+#endif
-+ kfree(alias);
-+ return ret;
-+}
-+
-+#if (YAFFS_NEW_FOLLOW_LINK == 1)
-+static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
-+{
-+ void *ret;
-+#else
-+static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
-+{
-+ int ret
-+#endif
-+ unsigned char *alias;
-+ int ret_int = 0;
-+ struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry));
-+ yaffs_gross_unlock(dev);
-+
-+ if (!alias) {
-+ ret_int = -ENOMEM;
-+ goto out;
-+ }
-+#if (YAFFS_NEW_FOLLOW_LINK == 1)
-+ nd_set_link(nd, alias);
-+ ret = alias;
-+out:
-+ if (ret_int)
-+ ret = ERR_PTR(ret_int);
-+ return ret;
-+#else
-+ ret = vfs_follow_link(nd, alias);
-+ kfree(alias);
-+out:
-+ if (ret_int)
-+ ret = ret_int;
-+ return ret;
-+#endif
-+}
-+
-+
-+#ifdef YAFFS_HAS_PUT_INODE
-+
-+/* For now put inode is just for debugging
-+ * Put inode is called when the inode **structure** is put.
-+ */
-+static void yaffs_put_inode(struct inode *inode)
-+{
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_put_inode: ino %d, count %d"),
-+ (int)inode->i_ino, atomic_read(&inode->i_count);
-+
-+}
-+#endif
-+
-+#if (YAFFS_NEW_FOLLOW_LINK == 1)
-+void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias)
-+{
-+ kfree(alias);
-+}
-+#endif
-+
-+static const struct inode_operations yaffs_symlink_inode_operations = {
-+ .readlink = yaffs_readlink,
-+ .follow_link = yaffs_follow_link,
-+#if (YAFFS_NEW_FOLLOW_LINK == 1)
-+ .put_link = yaffs_put_link,
-+#endif
-+ .setattr = yaffs_setattr,
-+ .setxattr = yaffs_setxattr,
-+ .getxattr = yaffs_getxattr,
-+ .listxattr = yaffs_listxattr,
-+ .removexattr = yaffs_removexattr,
-+};
-+
-+#ifdef YAFFS_USE_OWN_IGET
-+
-+static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino)
-+{
-+ struct inode *inode;
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_iget for %lu", ino);
-+
-+ inode = iget_locked(sb, ino);
-+ if (!inode)
-+ return ERR_PTR(-ENOMEM);
-+ if (!(inode->i_state & I_NEW))
-+ return inode;
-+
-+ /* NB This is called as a side effect of other functions, but
-+ * we had to release the lock to prevent deadlocks, so
-+ * need to lock again.
-+ */
-+
-+ yaffs_gross_lock(dev);
-+
-+ obj = yaffs_find_by_number(dev, inode->i_ino);
-+
-+ yaffs_fill_inode_from_obj(inode, obj);
-+
-+ yaffs_gross_unlock(dev);
-+
-+ unlock_new_inode(inode);
-+ return inode;
-+}
-+
-+#else
-+
-+static void yaffs_read_inode(struct inode *inode)
-+{
-+ /* NB This is called as a side effect of other functions, but
-+ * we had to release the lock to prevent deadlocks, so
-+ * need to lock again.
-+ */
-+
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev = yaffs_super_to_dev(inode->i_sb);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_read_inode for %d", (int)inode->i_ino);
-+
-+ if (current != yaffs_dev_to_lc(dev)->readdir_process)
-+ yaffs_gross_lock(dev);
-+
-+ obj = yaffs_find_by_number(dev, inode->i_ino);
-+
-+ yaffs_fill_inode_from_obj(inode, obj);
-+
-+ if (current != yaffs_dev_to_lc(dev)->readdir_process)
-+ yaffs_gross_unlock(dev);
-+}
-+
-+#endif
-+
-+
-+
-+struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
-+ struct yaffs_obj *obj)
-+{
-+ struct inode *inode;
-+
-+ if (!sb) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_get_inode for NULL super_block!!");
-+ return NULL;
-+
-+ }
-+
-+ if (!obj) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_get_inode for NULL object!!");
-+ return NULL;
-+
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_get_inode for object %d", obj->obj_id);
-+
-+ inode = Y_IGET(sb, obj->obj_id);
-+ if (IS_ERR(inode))
-+ return NULL;
-+
-+ /* NB Side effect: iget calls back to yaffs_read_inode(). */
-+ /* iget also increments the inode's i_count */
-+ /* NB You can't be holding gross_lock or deadlock will happen! */
-+
-+ return inode;
-+}
-+
-+
-+
-+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
-+#define YCRED(x) x
-+#else
-+#define YCRED(x) (x->cred)
-+#endif
-+
-+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,14,0)
-+#define YPROC_uid(p) (YCRED(p)->fsuid)
-+#define YPROC_gid(p) (YCRED(p)->fsgid)
-+#define EXTRACT_gid(x) x
-+#define EXTRACT_uid(x) x
-+#define MAKE_gid(x) x
-+#define MAKE_uid(x) x
-+#else
-+#define YPROC_uid(p) from_kuid(&init_user_ns, YCRED(p)->fsuid)
-+#define YPROC_gid(p) from_kgid(&init_user_ns, YCRED(p)->fsgid)
-+#define EXTRACT_gid(x) from_kgid(&init_user_ns, x)
-+#define EXTRACT_uid(x) from_kuid(&init_user_ns, x)
-+#define MAKE_gid(x) make_kgid(&init_user_ns, x)
-+#define MAKE_uid(x) make_kuid(&init_user_ns, x)
-+#endif
-+
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 4, 0))
-+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
-+ dev_t rdev)
-+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
-+ dev_t rdev)
-+#else
-+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
-+ int rdev)
-+#endif
-+{
-+ struct inode *inode;
-+
-+ struct yaffs_obj *obj = NULL;
-+ struct yaffs_dev *dev;
-+
-+ struct yaffs_obj *parent = yaffs_inode_to_obj(dir);
-+
-+ int error = -ENOSPC;
-+ uid_t uid = YPROC_uid(current);
-+ gid_t gid =
-+ (dir->i_mode & S_ISGID) ? EXTRACT_gid(dir->i_gid) : YPROC_gid(current);
-+
-+ if ((dir->i_mode & S_ISGID) && S_ISDIR(mode))
-+ mode |= S_ISGID;
-+
-+ if (parent) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_mknod: parent object %d type %d",
-+ parent->obj_id, parent->variant_type);
-+ } else {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_mknod: could not get parent object");
-+ return -EPERM;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_mknod: making oject for %s, mode %x dev %x",
-+ dentry->d_name.name, mode, rdev);
-+
-+ dev = parent->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ switch (mode & S_IFMT) {
-+ default:
-+ /* Special (socket, fifo, device...) */
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making special");
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+ obj =
-+ yaffs_create_special(parent, dentry->d_name.name, mode, uid,
-+ gid, old_encode_dev(rdev));
-+#else
-+ obj =
-+ yaffs_create_special(parent, dentry->d_name.name, mode, uid,
-+ gid, rdev);
-+#endif
-+ break;
-+ case S_IFREG: /* file */
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making file");
-+ obj = yaffs_create_file(parent, dentry->d_name.name, mode, uid,
-+ gid);
-+ break;
-+ case S_IFDIR: /* directory */
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making directory");
-+ obj = yaffs_create_dir(parent, dentry->d_name.name, mode,
-+ uid, gid);
-+ break;
-+ case S_IFLNK: /* symlink */
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making symlink");
-+ obj = NULL; /* Do we ever get here? */
-+ break;
-+ }
-+
-+ /* Can not call yaffs_get_inode() with gross lock held */
-+ yaffs_gross_unlock(dev);
-+
-+ if (obj) {
-+ inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
-+ d_instantiate(dentry, inode);
-+ update_dir_time(dir);
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_mknod created object %d count = %d",
-+ obj->obj_id, atomic_read(&inode->i_count));
-+ error = 0;
-+ yaffs_fill_inode_from_obj(dir, parent);
-+ } else {
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod failed making object");
-+ error = -ENOMEM;
-+ }
-+
-+ return error;
-+}
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 4, 0))
-+static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
-+#else
-+static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
-+#endif
-+{
-+ int ret_val;
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_mkdir");
-+ ret_val = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
-+ return ret_val;
-+}
-+
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 6, 0))
-+static int yaffs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-+ bool dummy)
-+#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 4, 0))
-+static int yaffs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-+ struct nameidata *n)
-+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
-+ struct nameidata *n)
-+#else
-+static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode)
-+#endif
-+{
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_create");
-+ return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
-+}
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 6, 0))
-+static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
-+ unsigned int dummy)
-+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
-+ struct nameidata *n)
-+#else
-+static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
-+#endif
-+{
-+ struct yaffs_obj *obj;
-+ struct inode *inode = NULL; /* NCB 2.5/2.6 needs NULL here */
-+
-+ struct yaffs_dev *dev = yaffs_inode_to_obj(dir)->my_dev;
-+
-+ if (current != yaffs_dev_to_lc(dev)->readdir_process)
-+ yaffs_gross_lock(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_lookup for %d:%s",
-+ yaffs_inode_to_obj(dir)->obj_id, dentry->d_name.name);
-+
-+ obj = yaffs_find_by_name(yaffs_inode_to_obj(dir), dentry->d_name.name);
-+
-+ obj = yaffs_get_equivalent_obj(obj); /* in case it was a hardlink */
-+
-+ /* Can't hold gross lock when calling yaffs_get_inode() */
-+ if (current != yaffs_dev_to_lc(dev)->readdir_process)
-+ yaffs_gross_unlock(dev);
-+
-+ if (obj) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_lookup found %d", obj->obj_id);
-+
-+ inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
-+ } else {
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_lookup not found");
-+
-+ }
-+
-+/* added NCB for 2.5/6 compatability - forces add even if inode is
-+ * NULL which creates dentry hash */
-+ d_add(dentry, inode);
-+
-+ return NULL;
-+}
-+
-+/*
-+ * Create a link...
-+ */
-+static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
-+ struct dentry *dentry)
-+{
-+ struct inode *inode = old_dentry->d_inode;
-+ struct yaffs_obj *obj = NULL;
-+ struct yaffs_obj *link = NULL;
-+ struct yaffs_dev *dev;
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_link");
-+
-+ obj = yaffs_inode_to_obj(inode);
-+ dev = obj->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ if (!S_ISDIR(inode->i_mode)) /* Don't link directories */
-+ link =
-+ yaffs_link_obj(yaffs_inode_to_obj(dir), dentry->d_name.name,
-+ obj);
-+
-+ if (link) {
-+ set_nlink(old_dentry->d_inode, yaffs_get_obj_link_count(obj));
-+ d_instantiate(dentry, old_dentry->d_inode);
-+ atomic_inc(&old_dentry->d_inode->i_count);
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_link link count %d i_count %d",
-+ old_dentry->d_inode->i_nlink,
-+ atomic_read(&old_dentry->d_inode->i_count));
-+ }
-+
-+ yaffs_gross_unlock(dev);
-+
-+ if (link) {
-+ update_dir_time(dir);
-+ return 0;
-+ }
-+
-+ return -EPERM;
-+}
-+
-+static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
-+ const char *symname)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev;
-+ uid_t uid = YPROC_uid(current);
-+ gid_t gid =
-+ (dir->i_mode & S_ISGID) ? EXTRACT_gid(dir->i_gid) : YPROC_gid(current);
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_symlink");
-+
-+ if (strnlen(dentry->d_name.name, YAFFS_MAX_NAME_LENGTH + 1) >
-+ YAFFS_MAX_NAME_LENGTH)
-+ return -ENAMETOOLONG;
-+
-+ if (strnlen(symname, YAFFS_MAX_ALIAS_LENGTH + 1) >
-+ YAFFS_MAX_ALIAS_LENGTH)
-+ return -ENAMETOOLONG;
-+
-+ dev = yaffs_inode_to_obj(dir)->my_dev;
-+ yaffs_gross_lock(dev);
-+ obj = yaffs_create_symlink(yaffs_inode_to_obj(dir), dentry->d_name.name,
-+ S_IFLNK | S_IRWXUGO, uid, gid, symname);
-+ yaffs_gross_unlock(dev);
-+
-+ if (obj) {
-+ struct inode *inode;
-+
-+ inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
-+ d_instantiate(dentry, inode);
-+ update_dir_time(dir);
-+ yaffs_trace(YAFFS_TRACE_OS, "symlink created OK");
-+ return 0;
-+ } else {
-+ yaffs_trace(YAFFS_TRACE_OS, "symlink not created");
-+ }
-+
-+ return -ENOMEM;
-+}
-+
-+/*
-+ * The VFS layer already does all the dentry stuff for rename.
-+ *
-+ * NB: POSIX says you can rename an object over an old object of the same name
-+ */
-+static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
-+ struct inode *new_dir, struct dentry *new_dentry)
-+{
-+ struct yaffs_dev *dev;
-+ int ret_val = YAFFS_FAIL;
-+ struct yaffs_obj *target;
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_rename");
-+ dev = yaffs_inode_to_obj(old_dir)->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ /* Check if the target is an existing directory that is not empty. */
-+ target = yaffs_find_by_name(yaffs_inode_to_obj(new_dir),
-+ new_dentry->d_name.name);
-+
-+ if (target && target->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY &&
-+ !list_empty(&target->variant.dir_variant.children)) {
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "target is non-empty dir");
-+
-+ ret_val = YAFFS_FAIL;
-+ } else {
-+ /* Now does unlinking internally using shadowing mechanism */
-+ yaffs_trace(YAFFS_TRACE_OS, "calling yaffs_rename_obj");
-+
-+ ret_val = yaffs_rename_obj(yaffs_inode_to_obj(old_dir),
-+ old_dentry->d_name.name,
-+ yaffs_inode_to_obj(new_dir),
-+ new_dentry->d_name.name);
-+ }
-+ yaffs_gross_unlock(dev);
-+
-+ if (ret_val == YAFFS_OK) {
-+ if (target)
-+ inode_dec_link_count(new_dentry->d_inode);
-+
-+ update_dir_time(old_dir);
-+ if (old_dir != new_dir)
-+ update_dir_time(new_dir);
-+ return 0;
-+ } else {
-+ return -ENOTEMPTY;
-+ }
-+}
-+
-+
-+
-+
-+static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
-+{
-+ int ret_val;
-+
-+ struct yaffs_dev *dev;
-+ struct yaffs_obj *obj;
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_unlink %d:%s",
-+ (int)(dir->i_ino), dentry->d_name.name);
-+ obj = yaffs_inode_to_obj(dir);
-+ dev = obj->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ ret_val = yaffs_unlinker(obj, dentry->d_name.name);
-+
-+ if (ret_val == YAFFS_OK) {
-+ inode_dec_link_count(dentry->d_inode);
-+ dir->i_version++;
-+ yaffs_gross_unlock(dev);
-+ update_dir_time(dir);
-+ return 0;
-+ }
-+ yaffs_gross_unlock(dev);
-+ return -ENOTEMPTY;
-+}
-+
-+
-+
-+static const struct inode_operations yaffs_dir_inode_operations = {
-+ .create = yaffs_create,
-+ .lookup = yaffs_lookup,
-+ .link = yaffs_link,
-+ .unlink = yaffs_unlink,
-+ .symlink = yaffs_symlink,
-+ .mkdir = yaffs_mkdir,
-+ .rmdir = yaffs_unlink,
-+ .mknod = yaffs_mknod,
-+ .rename = yaffs_rename,
-+ .setattr = yaffs_setattr,
-+ .setxattr = yaffs_setxattr,
-+ .getxattr = yaffs_getxattr,
-+ .listxattr = yaffs_listxattr,
-+ .removexattr = yaffs_removexattr,
-+};
-+
-+/*-----------------------------------------------------------------*/
-+/* Directory search context allows us to unlock access to yaffs during
-+ * filldir without causing problems with the directory being modified.
-+ * This is similar to the tried and tested mechanism used in yaffs direct.
-+ *
-+ * A search context iterates along a doubly linked list of siblings in the
-+ * directory. If the iterating object is deleted then this would corrupt
-+ * the list iteration, likely causing a crash. The search context avoids
-+ * this by using the remove_obj_fn to move the search context to the
-+ * next object before the object is deleted.
-+ *
-+ * Many readdirs (and thus seach conexts) may be alive simulateously so
-+ * each struct yaffs_dev has a list of these.
-+ *
-+ * A seach context lives for the duration of a readdir.
-+ *
-+ * All these functions must be called while yaffs is locked.
-+ */
-+
-+struct yaffs_search_context {
-+ struct yaffs_dev *dev;
-+ struct yaffs_obj *dir_obj;
-+ struct yaffs_obj *next_return;
-+ struct list_head others;
-+};
-+
-+/*
-+ * yaffs_new_search() creates a new search context, initialises it and
-+ * adds it to the device's search context list.
-+ *
-+ * Called at start of readdir.
-+ */
-+static struct yaffs_search_context *yaffs_new_search(struct yaffs_obj *dir)
-+{
-+ struct yaffs_dev *dev = dir->my_dev;
-+ struct yaffs_search_context *sc =
-+ kmalloc(sizeof(struct yaffs_search_context), GFP_NOFS);
-+ if (sc) {
-+ sc->dir_obj = dir;
-+ sc->dev = dev;
-+ if (list_empty(&sc->dir_obj->variant.dir_variant.children))
-+ sc->next_return = NULL;
-+ else
-+ sc->next_return =
-+ list_entry(dir->variant.dir_variant.children.next,
-+ struct yaffs_obj, siblings);
-+ INIT_LIST_HEAD(&sc->others);
-+ list_add(&sc->others, &(yaffs_dev_to_lc(dev)->search_contexts));
-+ }
-+ return sc;
-+}
-+
-+/*
-+ * yaffs_search_end() disposes of a search context and cleans up.
-+ */
-+static void yaffs_search_end(struct yaffs_search_context *sc)
-+{
-+ if (sc) {
-+ list_del(&sc->others);
-+ kfree(sc);
-+ }
-+}
-+
-+/*
-+ * yaffs_search_advance() moves a search context to the next object.
-+ * Called when the search iterates or when an object removal causes
-+ * the search context to be moved to the next object.
-+ */
-+static void yaffs_search_advance(struct yaffs_search_context *sc)
-+{
-+ if (!sc)
-+ return;
-+
-+ if (sc->next_return == NULL ||
-+ list_empty(&sc->dir_obj->variant.dir_variant.children))
-+ sc->next_return = NULL;
-+ else {
-+ struct list_head *next = sc->next_return->siblings.next;
-+
-+ if (next == &sc->dir_obj->variant.dir_variant.children)
-+ sc->next_return = NULL; /* end of list */
-+ else
-+ sc->next_return =
-+ list_entry(next, struct yaffs_obj, siblings);
-+ }
-+}
-+
-+/*
-+ * yaffs_remove_obj_callback() is called when an object is unlinked.
-+ * We check open search contexts and advance any which are currently
-+ * on the object being iterated.
-+ */
-+static void yaffs_remove_obj_callback(struct yaffs_obj *obj)
-+{
-+
-+ struct list_head *i;
-+ struct yaffs_search_context *sc;
-+ struct list_head *search_contexts =
-+ &(yaffs_dev_to_lc(obj->my_dev)->search_contexts);
-+
-+ /* Iterate through the directory search contexts.
-+ * If any are currently on the object being removed, then advance
-+ * the search context to the next object to prevent a hanging pointer.
-+ */
-+ list_for_each(i, search_contexts) {
-+ sc = list_entry(i, struct yaffs_search_context, others);
-+ if (sc->next_return == obj)
-+ yaffs_search_advance(sc);
-+ }
-+
-+}
-+
-+
-+/*-----------------------------------------------------------------*/
-+
-+#ifdef YAFFS_USE_DIR_ITERATE
-+static int yaffs_iterate(struct file *f, struct dir_context *dc)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev;
-+ struct yaffs_search_context *sc;
-+ unsigned long curoffs;
-+ struct yaffs_obj *l;
-+ int ret_val = 0;
-+
-+ char name[YAFFS_MAX_NAME_LENGTH + 1];
-+
-+ obj = yaffs_dentry_to_obj(f->f_dentry);
-+ dev = obj->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ yaffs_dev_to_lc(dev)->readdir_process = current;
-+
-+ sc = yaffs_new_search(obj);
-+ if (!sc) {
-+ ret_val = -ENOMEM;
-+ goto out;
-+ }
-+
-+ if (!dir_emit_dots(f, dc))
-+ return 0;
-+
-+ curoffs = 1;
-+
-+ while (sc->next_return) {
-+ curoffs++;
-+ l = sc->next_return;
-+ if (curoffs >= dc->pos) {
-+ int this_inode = yaffs_get_obj_inode(l);
-+ int this_type = yaffs_get_obj_type(l);
-+
-+ yaffs_get_obj_name(l, name, YAFFS_MAX_NAME_LENGTH + 1);
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readdir: %s inode %d",
-+ name, yaffs_get_obj_inode(l));
-+
-+ yaffs_gross_unlock(dev);
-+
-+ if (!dir_emit(dc,
-+ name,
-+ strlen(name),
-+ this_inode,
-+ this_type)) {
-+ yaffs_gross_lock(dev);
-+ goto out;
-+ }
-+
-+ yaffs_gross_lock(dev);
-+
-+ dc->pos++;
-+ f->f_pos++;
-+ }
-+ yaffs_search_advance(sc);
-+ }
-+
-+out:
-+ yaffs_search_end(sc);
-+ yaffs_dev_to_lc(dev)->readdir_process = NULL;
-+ yaffs_gross_unlock(dev);
-+
-+ return ret_val;
-+}
-+
-+#else
-+
-+static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev;
-+ struct yaffs_search_context *sc;
-+ struct inode *inode = f->f_dentry->d_inode;
-+ unsigned long offset, curoffs;
-+ struct yaffs_obj *l;
-+ int ret_val = 0;
-+
-+ char name[YAFFS_MAX_NAME_LENGTH + 1];
-+
-+ obj = yaffs_dentry_to_obj(f->f_dentry);
-+ dev = obj->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ yaffs_dev_to_lc(dev)->readdir_process = current;
-+
-+ offset = f->f_pos;
-+
-+ sc = yaffs_new_search(obj);
-+ if (!sc) {
-+ ret_val = -ENOMEM;
-+ goto out;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readdir: starting at %d", (int)offset);
-+
-+ if (offset == 0) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readdir: entry . ino %d",
-+ (int)inode->i_ino);
-+ yaffs_gross_unlock(dev);
-+ if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR) < 0) {
-+ yaffs_gross_lock(dev);
-+ goto out;
-+ }
-+ yaffs_gross_lock(dev);
-+ offset++;
-+ f->f_pos++;
-+ }
-+ if (offset == 1) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readdir: entry .. ino %d",
-+ (int)f->f_dentry->d_parent->d_inode->i_ino);
-+ yaffs_gross_unlock(dev);
-+ if (filldir(dirent, "..", 2, offset,
-+ f->f_dentry->d_parent->d_inode->i_ino,
-+ DT_DIR) < 0) {
-+ yaffs_gross_lock(dev);
-+ goto out;
-+ }
-+ yaffs_gross_lock(dev);
-+ offset++;
-+ f->f_pos++;
-+ }
-+
-+ curoffs = 1;
-+
-+ /* If the directory has changed since the open or last call to
-+ readdir, rewind to after the 2 canned entries. */
-+ if (f->f_version != inode->i_version) {
-+ offset = 2;
-+ f->f_pos = offset;
-+ f->f_version = inode->i_version;
-+ }
-+
-+ while (sc->next_return) {
-+ curoffs++;
-+ l = sc->next_return;
-+ if (curoffs >= offset) {
-+ int this_inode = yaffs_get_obj_inode(l);
-+ int this_type = yaffs_get_obj_type(l);
-+
-+ yaffs_get_obj_name(l, name, YAFFS_MAX_NAME_LENGTH + 1);
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readdir: %s inode %d",
-+ name, yaffs_get_obj_inode(l));
-+
-+ yaffs_gross_unlock(dev);
-+
-+ if (filldir(dirent,
-+ name,
-+ strlen(name),
-+ offset, this_inode, this_type) < 0) {
-+ yaffs_gross_lock(dev);
-+ goto out;
-+ }
-+
-+ yaffs_gross_lock(dev);
-+
-+ offset++;
-+ f->f_pos++;
-+ }
-+ yaffs_search_advance(sc);
-+ }
-+
-+out:
-+ yaffs_search_end(sc);
-+ yaffs_dev_to_lc(dev)->readdir_process = NULL;
-+ yaffs_gross_unlock(dev);
-+
-+ return ret_val;
-+}
-+
-+#endif
-+
-+static const struct file_operations yaffs_dir_operations = {
-+ .read = generic_read_dir,
-+#ifdef YAFFS_USE_DIR_ITERATE
-+ .iterate = yaffs_iterate,
-+#else
-+ .readdir = yaffs_readdir,
-+#endif
-+ .fsync = yaffs_sync_object,
-+ .llseek = generic_file_llseek,
-+};
-+
-+static void yaffs_fill_inode_from_obj(struct inode *inode,
-+ struct yaffs_obj *obj)
-+{
-+ if (inode && obj) {
-+
-+ /* Check mode against the variant type and attempt to repair if broken. */
-+ u32 mode = obj->yst_mode;
-+ switch (obj->variant_type) {
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ if (!S_ISREG(mode)) {
-+ obj->yst_mode &= ~S_IFMT;
-+ obj->yst_mode |= S_IFREG;
-+ }
-+
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ if (!S_ISLNK(mode)) {
-+ obj->yst_mode &= ~S_IFMT;
-+ obj->yst_mode |= S_IFLNK;
-+ }
-+
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ if (!S_ISDIR(mode)) {
-+ obj->yst_mode &= ~S_IFMT;
-+ obj->yst_mode |= S_IFDIR;
-+ }
-+
-+ break;
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ default:
-+ /* TODO? */
-+ break;
-+ }
-+
-+ inode->i_flags |= S_NOATIME;
-+
-+ inode->i_ino = obj->obj_id;
-+ inode->i_mode = obj->yst_mode;
-+ inode->i_uid = MAKE_uid(obj->yst_uid);
-+ inode->i_gid = MAKE_gid(obj->yst_gid);
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
-+ inode->i_blksize = inode->i_sb->s_blocksize;
-+#endif
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+
-+ inode->i_rdev = old_decode_dev(obj->yst_rdev);
-+ inode->i_atime.tv_sec = (time_t) (obj->yst_atime);
-+ inode->i_atime.tv_nsec = 0;
-+ inode->i_mtime.tv_sec = (time_t) obj->yst_mtime;
-+ inode->i_mtime.tv_nsec = 0;
-+ inode->i_ctime.tv_sec = (time_t) obj->yst_ctime;
-+ inode->i_ctime.tv_nsec = 0;
-+#else
-+ inode->i_rdev = obj->yst_rdev;
-+ inode->i_atime = obj->yst_atime;
-+ inode->i_mtime = obj->yst_mtime;
-+ inode->i_ctime = obj->yst_ctime;
-+#endif
-+ inode->i_size = yaffs_get_obj_length(obj);
-+ inode->i_blocks = (inode->i_size + 511) >> 9;
-+
-+ set_nlink(inode, yaffs_get_obj_link_count(obj));
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_fill_inode mode %x uid %d gid %d size %lld count %d",
-+ inode->i_mode, obj->yst_uid, obj->yst_gid,
-+ inode->i_size, atomic_read(&inode->i_count));
-+
-+ switch (obj->yst_mode & S_IFMT) {
-+ default: /* fifo, device or socket */
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+ init_special_inode(inode, obj->yst_mode,
-+ old_decode_dev(obj->yst_rdev));
-+#else
-+ init_special_inode(inode, obj->yst_mode,
-+ (dev_t) (obj->yst_rdev));
-+#endif
-+ break;
-+ case S_IFREG: /* file */
-+ inode->i_op = &yaffs_file_inode_operations;
-+ inode->i_fop = &yaffs_file_operations;
-+ inode->i_mapping->a_ops =
-+ &yaffs_file_address_operations;
-+ break;
-+ case S_IFDIR: /* directory */
-+ inode->i_op = &yaffs_dir_inode_operations;
-+ inode->i_fop = &yaffs_dir_operations;
-+ break;
-+ case S_IFLNK: /* symlink */
-+ inode->i_op = &yaffs_symlink_inode_operations;
-+ break;
-+ }
-+
-+ yaffs_inode_to_obj_lv(inode) = obj;
-+
-+ obj->my_inode = inode;
-+
-+ } else {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_fill_inode invalid parameters");
-+ }
-+
-+}
-+
-+
-+
-+/*
-+ * yaffs background thread functions .
-+ * yaffs_bg_thread_fn() the thread function
-+ * yaffs_bg_start() launches the background thread.
-+ * yaffs_bg_stop() cleans up the background thread.
-+ *
-+ * NB:
-+ * The thread should only run after the yaffs is initialised
-+ * The thread should be stopped before yaffs is unmounted.
-+ * The thread should not do any writing while the fs is in read only.
-+ */
-+
-+static unsigned yaffs_bg_gc_urgency(struct yaffs_dev *dev)
-+{
-+ unsigned erased_chunks =
-+ dev->n_erased_blocks * dev->param.chunks_per_block;
-+ struct yaffs_linux_context *context = yaffs_dev_to_lc(dev);
-+ unsigned scattered = 0; /* Free chunks not in an erased block */
-+
-+ if (erased_chunks < dev->n_free_chunks)
-+ scattered = (dev->n_free_chunks - erased_chunks);
-+
-+ if (!context->bg_running)
-+ return 0;
-+ else if (scattered < (dev->param.chunks_per_block * 2))
-+ return 0;
-+ else if (erased_chunks > dev->n_free_chunks / 2)
-+ return 0;
-+ else if (erased_chunks > dev->n_free_chunks / 4)
-+ return 1;
-+ else
-+ return 2;
-+}
-+
-+#ifdef YAFFS_COMPILE_BACKGROUND
-+
-+void yaffs_background_waker(unsigned long data)
-+{
-+ wake_up_process((struct task_struct *)data);
-+}
-+
-+static int yaffs_bg_thread_fn(void *data)
-+{
-+ struct yaffs_dev *dev = (struct yaffs_dev *)data;
-+ struct yaffs_linux_context *context = yaffs_dev_to_lc(dev);
-+ unsigned long now = jiffies;
-+ unsigned long next_dir_update = now;
-+ unsigned long next_gc = now;
-+ unsigned long expires;
-+ unsigned int urgency;
-+
-+ int gc_result;
-+ struct timer_list timer;
-+
-+ yaffs_trace(YAFFS_TRACE_BACKGROUND,
-+ "yaffs_background starting for dev %p", (void *)dev);
-+
-+#ifdef YAFFS_COMPILE_FREEZER
-+ set_freezable();
-+#endif
-+ while (context->bg_running) {
-+ yaffs_trace(YAFFS_TRACE_BACKGROUND, "yaffs_background");
-+
-+ if (kthread_should_stop())
-+ break;
-+
-+#ifdef YAFFS_COMPILE_FREEZER
-+ if (try_to_freeze())
-+ continue;
-+#endif
-+ yaffs_gross_lock(dev);
-+
-+ now = jiffies;
-+
-+ if (time_after(now, next_dir_update) && yaffs_bg_enable) {
-+ yaffs_update_dirty_dirs(dev);
-+ next_dir_update = now + HZ;
-+ }
-+
-+ if (time_after(now, next_gc) && yaffs_bg_enable) {
-+ if (!dev->is_checkpointed) {
-+ urgency = yaffs_bg_gc_urgency(dev);
-+ gc_result = yaffs_bg_gc(dev, urgency);
-+ if (urgency > 1)
-+ next_gc = now + HZ / 20 + 1;
-+ else if (urgency > 0)
-+ next_gc = now + HZ / 10 + 1;
-+ else
-+ next_gc = now + HZ * 2;
-+ } else {
-+ /*
-+ * gc not running so set to next_dir_update
-+ * to cut down on wake ups
-+ */
-+ next_gc = next_dir_update;
-+ }
-+ }
-+ yaffs_gross_unlock(dev);
-+#if 1
-+ expires = next_dir_update;
-+ if (time_before(next_gc, expires))
-+ expires = next_gc;
-+ if (time_before(expires, now))
-+ expires = now + HZ;
-+
-+ Y_INIT_TIMER(&timer);
-+ timer.expires = expires + 1;
-+ timer.data = (unsigned long)current;
-+ timer.function = yaffs_background_waker;
-+
-+ set_current_state(TASK_INTERRUPTIBLE);
-+ add_timer(&timer);
-+ schedule();
-+ del_timer_sync(&timer);
-+#else
-+ msleep(10);
-+#endif
-+ }
-+
-+ return 0;
-+}
-+
-+static int yaffs_bg_start(struct yaffs_dev *dev)
-+{
-+ int retval = 0;
-+ struct yaffs_linux_context *context = yaffs_dev_to_lc(dev);
-+
-+ if (dev->read_only)
-+ return -1;
-+
-+ context->bg_running = 1;
-+
-+ context->bg_thread = kthread_run(yaffs_bg_thread_fn,
-+ (void *)dev, "yaffs-bg-%d",
-+ context->mount_id);
-+
-+ if (IS_ERR(context->bg_thread)) {
-+ retval = PTR_ERR(context->bg_thread);
-+ context->bg_thread = NULL;
-+ context->bg_running = 0;
-+ }
-+ return retval;
-+}
-+
-+static void yaffs_bg_stop(struct yaffs_dev *dev)
-+{
-+ struct yaffs_linux_context *ctxt = yaffs_dev_to_lc(dev);
-+
-+ ctxt->bg_running = 0;
-+
-+ if (ctxt->bg_thread) {
-+ kthread_stop(ctxt->bg_thread);
-+ ctxt->bg_thread = NULL;
-+ }
-+}
-+#else
-+static int yaffs_bg_thread_fn(void *data)
-+{
-+ return 0;
-+}
-+
-+static int yaffs_bg_start(struct yaffs_dev *dev)
-+{
-+ return 0;
-+}
-+
-+static void yaffs_bg_stop(struct yaffs_dev *dev)
-+{
-+}
-+#endif
-+
-+
-+static void yaffs_flush_inodes(struct super_block *sb)
-+{
-+ struct inode *iptr;
-+ struct yaffs_obj *obj;
-+
-+ list_for_each_entry(iptr, &sb->s_inodes, i_sb_list) {
-+ obj = yaffs_inode_to_obj(iptr);
-+ if (obj) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "flushing obj %d",
-+ obj->obj_id);
-+ yaffs_flush_file(obj, 1, 0, 0);
-+ }
-+ }
-+}
-+
-+static void yaffs_flush_super(struct super_block *sb, int do_checkpoint)
-+{
-+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
-+ if (!dev)
-+ return;
-+
-+ yaffs_flush_inodes(sb);
-+ yaffs_update_dirty_dirs(dev);
-+ yaffs_flush_whole_cache(dev, 1);
-+ if (do_checkpoint)
-+ yaffs_checkpoint_save(dev);
-+}
-+
-+static LIST_HEAD(yaffs_context_list);
-+struct mutex yaffs_context_lock;
-+
-+static void yaffs_put_super(struct super_block *sb)
-+{
-+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
-+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_ALWAYS,
-+ "yaffs_put_super");
-+
-+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND,
-+ "Shutting down yaffs background thread");
-+ yaffs_bg_stop(dev);
-+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND,
-+ "yaffs background thread shut down");
-+
-+ yaffs_gross_lock(dev);
-+
-+ yaffs_flush_super(sb, 1);
-+
-+ yaffs_deinitialise(dev);
-+
-+ yaffs_gross_unlock(dev);
-+
-+ mutex_lock(&yaffs_context_lock);
-+ list_del_init(&(yaffs_dev_to_lc(dev)->context_list));
-+ mutex_unlock(&yaffs_context_lock);
-+
-+ if (yaffs_dev_to_lc(dev)->spare_buffer) {
-+ kfree(yaffs_dev_to_lc(dev)->spare_buffer);
-+ yaffs_dev_to_lc(dev)->spare_buffer = NULL;
-+ }
-+
-+ kfree(dev);
-+
-+ yaffs_put_mtd_device(mtd);
-+
-+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_ALWAYS,
-+ "yaffs_put_super done");
-+}
-+
-+
-+static unsigned yaffs_gc_control_callback(struct yaffs_dev *dev)
-+{
-+ return yaffs_gc_control;
-+}
-+
-+
-+#ifdef YAFFS_COMPILE_EXPORTFS
-+
-+static struct inode *yaffs2_nfs_get_inode(struct super_block *sb, uint64_t ino,
-+ uint32_t generation)
-+{
-+ return Y_IGET(sb, ino);
-+}
-+
-+static struct dentry *yaffs2_fh_to_dentry(struct super_block *sb,
-+ struct fid *fid, int fh_len,
-+ int fh_type)
-+{
-+ return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
-+ yaffs2_nfs_get_inode);
-+}
-+
-+static struct dentry *yaffs2_fh_to_parent(struct super_block *sb,
-+ struct fid *fid, int fh_len,
-+ int fh_type)
-+{
-+ return generic_fh_to_parent(sb, fid, fh_len, fh_type,
-+ yaffs2_nfs_get_inode);
-+}
-+
-+struct dentry *yaffs2_get_parent(struct dentry *dentry)
-+{
-+
-+ struct super_block *sb = dentry->d_inode->i_sb;
-+ struct dentry *parent = ERR_PTR(-ENOENT);
-+ struct inode *inode;
-+ unsigned long parent_ino;
-+ struct yaffs_obj *d_obj;
-+ struct yaffs_obj *parent_obj;
-+
-+ d_obj = yaffs_inode_to_obj(dentry->d_inode);
-+
-+ if (d_obj) {
-+ parent_obj = d_obj->parent;
-+ if (parent_obj) {
-+ parent_ino = yaffs_get_obj_inode(parent_obj);
-+ inode = Y_IGET(sb, parent_ino);
-+
-+ if (IS_ERR(inode)) {
-+ parent = ERR_CAST(inode);
-+ } else {
-+ parent = d_obtain_alias(inode);
-+ if (!IS_ERR(parent)) {
-+ parent = ERR_PTR(-ENOMEM);
-+ iput(inode);
-+ }
-+ }
-+ }
-+ }
-+
-+ return parent;
-+}
-+
-+/* Just declare a zero structure as a NULL value implies
-+ * using the default functions of exportfs.
-+ */
-+
-+static struct export_operations yaffs_export_ops = {
-+ .fh_to_dentry = yaffs2_fh_to_dentry,
-+ .fh_to_parent = yaffs2_fh_to_parent,
-+ .get_parent = yaffs2_get_parent,
-+};
-+
-+#endif
-+
-+static void yaffs_unstitch_obj(struct inode *inode, struct yaffs_obj *obj)
-+{
-+ /* Clear the association between the inode and
-+ * the struct yaffs_obj.
-+ */
-+ obj->my_inode = NULL;
-+ yaffs_inode_to_obj_lv(inode) = NULL;
-+
-+ /* If the object freeing was deferred, then the real
-+ * free happens now.
-+ * This should fix the inode inconsistency problem.
-+ */
-+ yaffs_handle_defered_free(obj);
-+}
-+
-+#ifdef YAFFS_HAS_EVICT_INODE
-+/* yaffs_evict_inode combines into one operation what was previously done in
-+ * yaffs_clear_inode() and yaffs_delete_inode()
-+ *
-+ */
-+static void yaffs_evict_inode(struct inode *inode)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev;
-+ int deleteme = 0;
-+
-+ obj = yaffs_inode_to_obj(inode);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_evict_inode: ino %d, count %d %s",
-+ (int)inode->i_ino, atomic_read(&inode->i_count),
-+ obj ? "object exists" : "null object");
-+
-+ if (!inode->i_nlink && !is_bad_inode(inode))
-+ deleteme = 1;
-+ truncate_inode_pages(&inode->i_data, 0);
-+ Y_CLEAR_INODE(inode);
-+
-+ if (deleteme && obj) {
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+ yaffs_del_obj(obj);
-+ yaffs_gross_unlock(dev);
-+ }
-+ if (obj) {
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+ yaffs_unstitch_obj(inode, obj);
-+ yaffs_gross_unlock(dev);
-+ }
-+}
-+#else
-+
-+/* clear is called to tell the fs to release any per-inode data it holds.
-+ * The object might still exist on disk and is just being thrown out of the cache
-+ * or else the object has actually been deleted and we're being called via
-+ * the chain
-+ * yaffs_delete_inode() -> clear_inode()->yaffs_clear_inode()
-+ */
-+
-+static void yaffs_clear_inode(struct inode *inode)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev;
-+
-+ obj = yaffs_inode_to_obj(inode);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_clear_inode: ino %d, count %d %s",
-+ (int)inode->i_ino, atomic_read(&inode->i_count),
-+ obj ? "object exists" : "null object");
-+
-+ if (obj) {
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+ yaffs_unstitch_obj(inode, obj);
-+ yaffs_gross_unlock(dev);
-+ }
-+
-+}
-+
-+/* delete is called when the link count is zero and the inode
-+ * is put (ie. nobody wants to know about it anymore, time to
-+ * delete the file).
-+ * NB Must call clear_inode()
-+ */
-+static void yaffs_delete_inode(struct inode *inode)
-+{
-+ struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
-+ struct yaffs_dev *dev;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_delete_inode: ino %d, count %d %s",
-+ (int)inode->i_ino, atomic_read(&inode->i_count),
-+ obj ? "object exists" : "null object");
-+
-+ if (obj) {
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+ yaffs_del_obj(obj);
-+ yaffs_gross_unlock(dev);
-+ }
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
-+ truncate_inode_pages(&inode->i_data, 0);
-+#endif
-+ clear_inode(inode);
-+}
-+#endif
-+
-+
-+
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-+static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf)
-+{
-+ struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev;
-+ struct super_block *sb = dentry->d_sb;
-+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf)
-+{
-+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
-+#else
-+static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
-+{
-+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
-+#endif
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_statfs");
-+
-+ yaffs_gross_lock(dev);
-+
-+ buf->f_type = YAFFS_MAGIC;
-+ buf->f_bsize = sb->s_blocksize;
-+ buf->f_namelen = 255;
-+
-+ if (dev->data_bytes_per_chunk & (dev->data_bytes_per_chunk - 1)) {
-+ /* Do this if chunk size is not a power of 2 */
-+
-+ uint64_t bytes_in_dev;
-+ uint64_t bytes_free;
-+
-+ bytes_in_dev =
-+ ((uint64_t)
-+ ((dev->param.end_block - dev->param.start_block +
-+ 1))) * ((uint64_t) (dev->param.chunks_per_block *
-+ dev->data_bytes_per_chunk));
-+
-+ do_div(bytes_in_dev, sb->s_blocksize); /* bytes_in_dev becomes the number of blocks */
-+ buf->f_blocks = bytes_in_dev;
-+
-+ bytes_free = ((uint64_t) (yaffs_get_n_free_chunks(dev))) *
-+ ((uint64_t) (dev->data_bytes_per_chunk));
-+
-+ do_div(bytes_free, sb->s_blocksize);
-+
-+ buf->f_bfree = bytes_free;
-+
-+ } else if (sb->s_blocksize > dev->data_bytes_per_chunk) {
-+
-+ buf->f_blocks =
-+ (dev->param.end_block - dev->param.start_block + 1) *
-+ dev->param.chunks_per_block /
-+ (sb->s_blocksize / dev->data_bytes_per_chunk);
-+ buf->f_bfree =
-+ yaffs_get_n_free_chunks(dev) /
-+ (sb->s_blocksize / dev->data_bytes_per_chunk);
-+ } else {
-+ buf->f_blocks =
-+ (dev->param.end_block - dev->param.start_block + 1) *
-+ dev->param.chunks_per_block *
-+ (dev->data_bytes_per_chunk / sb->s_blocksize);
-+
-+ buf->f_bfree =
-+ yaffs_get_n_free_chunks(dev) *
-+ (dev->data_bytes_per_chunk / sb->s_blocksize);
-+ }
-+
-+ buf->f_files = 0;
-+ buf->f_ffree = 0;
-+ buf->f_bavail = buf->f_bfree;
-+
-+ yaffs_gross_unlock(dev);
-+ return 0;
-+}
-+
-+
-+
-+static int yaffs_do_sync_fs(struct super_block *sb, int request_checkpoint)
-+{
-+
-+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
-+ unsigned int oneshot_checkpoint = (yaffs_auto_checkpoint & 4);
-+ unsigned gc_urgent = yaffs_bg_gc_urgency(dev);
-+ int do_checkpoint;
-+ int dirty = yaffs_check_super_dirty(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND,
-+ "yaffs_do_sync_fs: gc-urgency %d %s %s%s",
-+ gc_urgent,
-+ dirty ? "dirty" : "clean",
-+ request_checkpoint ? "checkpoint requested" : "no checkpoint",
-+ oneshot_checkpoint ? " one-shot" : "");
-+
-+ yaffs_gross_lock(dev);
-+ do_checkpoint = ((request_checkpoint && !gc_urgent) ||
-+ oneshot_checkpoint) && !dev->is_checkpointed;
-+
-+ if (dirty || do_checkpoint) {
-+ yaffs_flush_super(sb, !dev->is_checkpointed && do_checkpoint);
-+ yaffs_clear_super_dirty(dev);
-+ if (oneshot_checkpoint)
-+ yaffs_auto_checkpoint &= ~4;
-+ }
-+ yaffs_gross_unlock(dev);
-+
-+ return 0;
-+}
-+
-+
-+#ifdef YAFFS_HAS_WRITE_SUPER
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-+static void yaffs_write_super(struct super_block *sb)
-+#else
-+static int yaffs_write_super(struct super_block *sb)
-+#endif
-+{
-+ unsigned request_checkpoint = (yaffs_auto_checkpoint >= 2);
-+
-+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND,
-+ "yaffs_write_super %s",
-+ request_checkpoint ? " checkpt" : "");
-+
-+ yaffs_do_sync_fs(sb, request_checkpoint);
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 18))
-+ return 0;
-+#endif
-+}
-+#endif
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-+static int yaffs_sync_fs(struct super_block *sb, int wait)
-+#else
-+static int yaffs_sync_fs(struct super_block *sb)
-+#endif
-+{
-+ unsigned request_checkpoint = (yaffs_auto_checkpoint >= 1);
-+
-+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC,
-+ "yaffs_sync_fs%s", request_checkpoint ? " checkpt" : "");
-+
-+ yaffs_do_sync_fs(sb, request_checkpoint);
-+
-+ return 0;
-+}
-+
-+/* the function only is used to change dev->read_only when this file system
-+ * is remounted.
-+ */
-+static int yaffs_remount_fs(struct super_block *sb, int *flags, char *data)
-+{
-+ int read_only = 0;
-+ struct mtd_info *mtd;
-+ struct yaffs_dev *dev = 0;
-+
-+ /* Get the device */
-+ mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
-+ if (!mtd) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "MTD device #%u doesn't appear to exist",
-+ MINOR(sb->s_dev));
-+ return 1;
-+ }
-+
-+ /* Check it's NAND */
-+ if (mtd->type != MTD_NANDFLASH) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "MTD device is not NAND it's type %d",
-+ mtd->type);
-+ return 1;
-+ }
-+
-+ read_only = ((*flags & MS_RDONLY) != 0);
-+ if (!read_only && !(mtd->flags & MTD_WRITEABLE)) {
-+ read_only = 1;
-+ printk(KERN_INFO
-+ "yaffs: mtd is read only, setting superblock read only");
-+ *flags |= MS_RDONLY;
-+ }
-+
-+ dev = sb->s_fs_info;
-+ dev->read_only = read_only;
-+
-+ return 0;
-+}
-+
-+static const struct super_operations yaffs_super_ops = {
-+ .statfs = yaffs_statfs,
-+
-+#ifndef YAFFS_USE_OWN_IGET
-+ .read_inode = yaffs_read_inode,
-+#endif
-+#ifdef YAFFS_HAS_PUT_INODE
-+ .put_inode = yaffs_put_inode,
-+#endif
-+ .put_super = yaffs_put_super,
-+#ifdef YAFFS_HAS_EVICT_INODE
-+ .evict_inode = yaffs_evict_inode,
-+#else
-+ .delete_inode = yaffs_delete_inode,
-+ .clear_inode = yaffs_clear_inode,
-+#endif
-+ .sync_fs = yaffs_sync_fs,
-+#ifdef YAFFS_HAS_WRITE_SUPER
-+ .write_super = yaffs_write_super,
-+#endif
-+ .remount_fs = yaffs_remount_fs,
-+};
-+
-+struct yaffs_options {
-+ int inband_tags;
-+ int skip_checkpoint_read;
-+ int skip_checkpoint_write;
-+ int no_cache;
-+ int tags_ecc_on;
-+ int tags_ecc_overridden;
-+ int lazy_loading_enabled;
-+ int lazy_loading_overridden;
-+ int empty_lost_and_found;
-+ int empty_lost_and_found_overridden;
-+ int disable_summary;
-+};
-+
-+#define MAX_OPT_LEN 30
-+static int yaffs_parse_options(struct yaffs_options *options,
-+ const char *options_str)
-+{
-+ char cur_opt[MAX_OPT_LEN + 1];
-+ int p;
-+ int error = 0;
-+
-+ /* Parse through the options which is a comma seperated list */
-+
-+ while (options_str && *options_str && !error) {
-+ memset(cur_opt, 0, MAX_OPT_LEN + 1);
-+ p = 0;
-+
-+ while (*options_str == ',')
-+ options_str++;
-+
-+ while (*options_str && *options_str != ',') {
-+ if (p < MAX_OPT_LEN) {
-+ cur_opt[p] = *options_str;
-+ p++;
-+ }
-+ options_str++;
-+ }
-+
-+ if (!strcmp(cur_opt, "inband-tags")) {
-+ options->inband_tags = 1;
-+ } else if (!strcmp(cur_opt, "tags-ecc-off")) {
-+ options->tags_ecc_on = 0;
-+ options->tags_ecc_overridden = 1;
-+ } else if (!strcmp(cur_opt, "tags-ecc-on")) {
-+ options->tags_ecc_on = 1;
-+ options->tags_ecc_overridden = 1;
-+ } else if (!strcmp(cur_opt, "lazy-loading-off")) {
-+ options->lazy_loading_enabled = 0;
-+ options->lazy_loading_overridden = 1;
-+ } else if (!strcmp(cur_opt, "lazy-loading-on")) {
-+ options->lazy_loading_enabled = 1;
-+ options->lazy_loading_overridden = 1;
-+ } else if (!strcmp(cur_opt, "disable-summary")) {
-+ options->disable_summary = 1;
-+ } else if (!strcmp(cur_opt, "empty-lost-and-found-off")) {
-+ options->empty_lost_and_found = 0;
-+ options->empty_lost_and_found_overridden = 1;
-+ } else if (!strcmp(cur_opt, "empty-lost-and-found-on")) {
-+ options->empty_lost_and_found = 1;
-+ options->empty_lost_and_found_overridden = 1;
-+ } else if (!strcmp(cur_opt, "no-cache")) {
-+ options->no_cache = 1;
-+ } else if (!strcmp(cur_opt, "no-checkpoint-read")) {
-+ options->skip_checkpoint_read = 1;
-+ } else if (!strcmp(cur_opt, "no-checkpoint-write")) {
-+ options->skip_checkpoint_write = 1;
-+ } else if (!strcmp(cur_opt, "no-checkpoint")) {
-+ options->skip_checkpoint_read = 1;
-+ options->skip_checkpoint_write = 1;
-+ } else {
-+ printk(KERN_INFO "yaffs: Bad mount option \"%s\"\n",
-+ cur_opt);
-+ error = 1;
-+ }
-+ }
-+
-+ return error;
-+}
-+
-+
-+static struct dentry *yaffs_make_root(struct inode *inode)
-+{
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 4, 0))
-+ struct dentry *root = d_alloc_root(inode);
-+
-+ if (!root)
-+ iput(inode);
-+
-+ return root;
-+#else
-+ return d_make_root(inode);
-+#endif
-+}
-+
-+
-+
-+
-+static struct super_block *yaffs_internal_read_super(int yaffs_version,
-+ struct super_block *sb,
-+ void *data, int silent)
-+{
-+ int n_blocks;
-+ struct inode *inode = NULL;
-+ struct dentry *root;
-+ struct yaffs_dev *dev = 0;
-+ char devname_buf[BDEVNAME_SIZE + 1];
-+ struct mtd_info *mtd;
-+ int err;
-+ char *data_str = (char *)data;
-+ struct yaffs_linux_context *context = NULL;
-+ struct yaffs_param *param;
-+
-+ int read_only = 0;
-+ int inband_tags = 0;
-+
-+ struct yaffs_options options;
-+
-+ unsigned mount_id;
-+ int found;
-+ struct yaffs_linux_context *context_iterator;
-+ struct list_head *l;
-+
-+ if (!sb) {
-+ printk(KERN_INFO "yaffs: sb is NULL\n");
-+ return NULL;
-+ }
-+
-+ sb->s_magic = YAFFS_MAGIC;
-+ sb->s_op = &yaffs_super_ops;
-+ sb->s_flags |= MS_NOATIME;
-+
-+ read_only = ((sb->s_flags & MS_RDONLY) != 0);
-+
-+#ifdef YAFFS_COMPILE_EXPORTFS
-+ sb->s_export_op = &yaffs_export_ops;
-+#endif
-+
-+ if (!sb->s_dev)
-+ printk(KERN_INFO "yaffs: sb->s_dev is NULL\n");
-+ else if (!yaffs_devname(sb, devname_buf))
-+ printk(KERN_INFO "yaffs: devname is NULL\n");
-+ else
-+ printk(KERN_INFO "yaffs: dev is %d name is \"%s\" %s\n",
-+ sb->s_dev,
-+ yaffs_devname(sb, devname_buf), read_only ? "ro" : "rw");
-+
-+ if (!data_str)
-+ data_str = "";
-+
-+ printk(KERN_INFO "yaffs: passed flags \"%s\"\n", data_str);
-+
-+ memset(&options, 0, sizeof(options));
-+
-+ if (yaffs_parse_options(&options, data_str)) {
-+ /* Option parsing failed */
-+ return NULL;
-+ }
-+
-+ sb->s_blocksize = PAGE_CACHE_SIZE;
-+ sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_read_super: Using yaffs%d", yaffs_version);
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_read_super: block size %d", (int)(sb->s_blocksize));
-+
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs: Attempting MTD mount of %u.%u,\"%s\"",
-+ MAJOR(sb->s_dev), MINOR(sb->s_dev),
-+ yaffs_devname(sb, devname_buf));
-+
-+ /* Get the device */
-+ mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
-+ if (IS_ERR(mtd)) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs: MTD device %u either not valid or unavailable",
-+ MINOR(sb->s_dev));
-+ return NULL;
-+ }
-+
-+ if (yaffs_auto_select && yaffs_version == 1 && WRITE_SIZE(mtd) >= 2048) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "auto selecting yaffs2");
-+ yaffs_version = 2;
-+ }
-+
-+ /* Added NCB 26/5/2006 for completeness */
-+ if (yaffs_version == 2 && !options.inband_tags
-+ && WRITE_SIZE(mtd) == 512) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "auto selecting yaffs1");
-+ yaffs_version = 1;
-+ }
-+
-+ if (mtd->oobavail < sizeof(struct yaffs_packed_tags2) ||
-+ options.inband_tags)
-+ inband_tags = 1;
-+
-+ if(yaffs_verify_mtd(mtd, yaffs_version, inband_tags) < 0)
-+ return NULL;
-+
-+ /* OK, so if we got here, we have an MTD that's NAND and looks
-+ * like it has the right capabilities
-+ * Set the struct yaffs_dev up for mtd
-+ */
-+
-+ if (!read_only && !(mtd->flags & MTD_WRITEABLE)) {
-+ read_only = 1;
-+ printk(KERN_INFO
-+ "yaffs: mtd is read only, setting superblock read only\n"
-+ );
-+ sb->s_flags |= MS_RDONLY;
-+ }
-+
-+ dev = kmalloc(sizeof(struct yaffs_dev), GFP_KERNEL);
-+ context = kmalloc(sizeof(struct yaffs_linux_context), GFP_KERNEL);
-+
-+ if (!dev || !context) {
-+ kfree(dev);
-+ kfree(context);
-+ dev = NULL;
-+ context = NULL;
-+
-+ /* Deep shit could not allocate device structure */
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs_read_super: Failed trying to allocate struct yaffs_dev."
-+ );
-+ return NULL;
-+ }
-+ memset(dev, 0, sizeof(struct yaffs_dev));
-+ param = &(dev->param);
-+
-+ memset(context, 0, sizeof(struct yaffs_linux_context));
-+ dev->os_context = context;
-+ INIT_LIST_HEAD(&(context->context_list));
-+ context->dev = dev;
-+ context->super = sb;
-+
-+ dev->read_only = read_only;
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+ sb->s_fs_info = dev;
-+#else
-+ sb->u.generic_sbp = dev;
-+#endif
-+
-+
-+ dev->driver_context = mtd;
-+ param->name = mtd->name;
-+
-+ /* Set up the memory size parameters.... */
-+
-+
-+ param->n_reserved_blocks = 5;
-+ param->n_caches = (options.no_cache) ? 0 : 10;
-+ param->inband_tags = inband_tags;
-+
-+ param->enable_xattr = 1;
-+ if (options.lazy_loading_overridden)
-+ param->disable_lazy_load = !options.lazy_loading_enabled;
-+
-+ param->defered_dir_update = 1;
-+
-+ if (options.tags_ecc_overridden)
-+ param->no_tags_ecc = !options.tags_ecc_on;
-+
-+ param->empty_lost_n_found = 1;
-+ param->refresh_period = 500;
-+ param->disable_summary = options.disable_summary;
-+
-+
-+#ifdef CONFIG_YAFFS_DISABLE_BAD_BLOCK_MARKING
-+ param->disable_bad_block_marking = 1;
-+#endif
-+ if (options.empty_lost_and_found_overridden)
-+ param->empty_lost_n_found = options.empty_lost_and_found;
-+
-+ /* ... and the functions. */
-+ if (yaffs_version == 2) {
-+ param->is_yaffs2 = 1;
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-+ param->total_bytes_per_chunk = mtd->writesize;
-+ param->chunks_per_block = mtd->erasesize / mtd->writesize;
-+#else
-+ param->total_bytes_per_chunk = mtd->oobblock;
-+ param->chunks_per_block = mtd->erasesize / mtd->oobblock;
-+#endif
-+ n_blocks = YCALCBLOCKS(mtd->size, mtd->erasesize);
-+
-+ param->start_block = 0;
-+ param->end_block = n_blocks - 1;
-+ } else {
-+ param->is_yaffs2 = 0;
-+ n_blocks = YCALCBLOCKS(mtd->size,
-+ YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK);
-+
-+ param->chunks_per_block = YAFFS_CHUNKS_PER_BLOCK;
-+ param->total_bytes_per_chunk = YAFFS_BYTES_PER_CHUNK;
-+ }
-+
-+ param->start_block = 0;
-+ param->end_block = n_blocks - 1;
-+
-+ yaffs_mtd_drv_install(dev);
-+
-+ param->sb_dirty_fn = yaffs_set_super_dirty;
-+ param->gc_control_fn = yaffs_gc_control_callback;
-+
-+ yaffs_dev_to_lc(dev)->super = sb;
-+
-+ param->use_nand_ecc = 1;
-+
-+ param->skip_checkpt_rd = options.skip_checkpoint_read;
-+ param->skip_checkpt_wr = options.skip_checkpoint_write;
-+
-+ mutex_lock(&yaffs_context_lock);
-+ /* Get a mount id */
-+ found = 0;
-+ for (mount_id = 0; !found; mount_id++) {
-+ found = 1;
-+ list_for_each(l, &yaffs_context_list) {
-+ context_iterator =
-+ list_entry(l, struct yaffs_linux_context,
-+ context_list);
-+ if (context_iterator->mount_id == mount_id)
-+ found = 0;
-+ }
-+ }
-+ context->mount_id = mount_id;
-+
-+ list_add_tail(&(yaffs_dev_to_lc(dev)->context_list),
-+ &yaffs_context_list);
-+ mutex_unlock(&yaffs_context_lock);
-+
-+ /* Directory search handling... */
-+ INIT_LIST_HEAD(&(yaffs_dev_to_lc(dev)->search_contexts));
-+ param->remove_obj_fn = yaffs_remove_obj_callback;
-+
-+ mutex_init(&(yaffs_dev_to_lc(dev)->gross_lock));
-+
-+ yaffs_gross_lock(dev);
-+
-+ err = yaffs_guts_initialise(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_read_super: guts initialised %s",
-+ (err == YAFFS_OK) ? "OK" : "FAILED");
-+
-+ if (err == YAFFS_OK)
-+ yaffs_bg_start(dev);
-+
-+ if (!context->bg_thread)
-+ param->defered_dir_update = 0;
-+
-+ sb->s_maxbytes = yaffs_max_file_size(dev);
-+
-+ /* Release lock before yaffs_get_inode() */
-+ yaffs_gross_unlock(dev);
-+
-+ /* Create root inode */
-+ if (err == YAFFS_OK)
-+ inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0, yaffs_root(dev));
-+
-+ if (!inode)
-+ return NULL;
-+
-+ inode->i_op = &yaffs_dir_inode_operations;
-+ inode->i_fop = &yaffs_dir_operations;
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_read_super: got root inode");
-+
-+ root = yaffs_make_root(inode);
-+
-+ if (!root)
-+ return NULL;
-+
-+ sb->s_root = root;
-+ if(!dev->is_checkpointed)
-+ yaffs_set_super_dirty(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs_read_super: is_checkpointed %d",
-+ dev->is_checkpointed);
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_read_super: done");
-+ return sb;
-+}
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+static int yaffs_internal_read_super_mtd(struct super_block *sb, void *data,
-+ int silent)
-+{
-+ return yaffs_internal_read_super(1, sb, data, silent) ? 0 : -EINVAL;
-+}
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
-+static struct dentry *yaffs_mount(struct file_system_type *fs_type, int flags,
-+ const char *dev_name, void *data)
-+{
-+ return mount_bdev(fs_type, flags, dev_name, data, yaffs_internal_read_super_mtd);
-+}
-+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-+static int yaffs_read_super(struct file_system_type *fs,
-+ int flags, const char *dev_name,
-+ void *data, struct vfsmount *mnt)
-+{
-+
-+ return get_sb_bdev(fs, flags, dev_name, data,
-+ yaffs_internal_read_super_mtd, mnt);
-+}
-+#else
-+static struct super_block *yaffs_read_super(struct file_system_type *fs,
-+ int flags, const char *dev_name,
-+ void *data)
-+{
-+
-+ return get_sb_bdev(fs, flags, dev_name, data,
-+ yaffs_internal_read_super_mtd);
-+}
-+#endif
-+
-+static struct file_system_type yaffs_fs_type = {
-+ .owner = THIS_MODULE,
-+ .name = "yaffs",
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
-+ .mount = yaffs_mount,
-+#else
-+ .get_sb = yaffs_read_super,
-+#endif
-+ .kill_sb = kill_block_super,
-+ .fs_flags = FS_REQUIRES_DEV,
-+};
-+#else
-+static struct super_block *yaffs_read_super(struct super_block *sb, void *data,
-+ int silent)
-+{
-+ return yaffs_internal_read_super(1, sb, data, silent);
-+}
-+
-+static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super,
-+ FS_REQUIRES_DEV);
-+#endif
-+
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+static int yaffs2_internal_read_super_mtd(struct super_block *sb, void *data,
-+ int silent)
-+{
-+ return yaffs_internal_read_super(2, sb, data, silent) ? 0 : -EINVAL;
-+}
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
-+static struct dentry *yaffs2_mount(struct file_system_type *fs_type, int flags,
-+ const char *dev_name, void *data)
-+{
-+ return mount_bdev(fs_type, flags, dev_name, data, yaffs2_internal_read_super_mtd);
-+}
-+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-+static int yaffs2_read_super(struct file_system_type *fs,
-+ int flags, const char *dev_name, void *data,
-+ struct vfsmount *mnt)
-+{
-+ return get_sb_bdev(fs, flags, dev_name, data,
-+ yaffs2_internal_read_super_mtd, mnt);
-+}
-+#else
-+static struct super_block *yaffs2_read_super(struct file_system_type *fs,
-+ int flags, const char *dev_name,
-+ void *data)
-+{
-+
-+ return get_sb_bdev(fs, flags, dev_name, data,
-+ yaffs2_internal_read_super_mtd);
-+}
-+#endif
-+
-+static struct file_system_type yaffs2_fs_type = {
-+ .owner = THIS_MODULE,
-+ .name = "yaffs2",
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
-+ .mount = yaffs2_mount,
-+#else
-+ .get_sb = yaffs2_read_super,
-+#endif
-+ .kill_sb = kill_block_super,
-+ .fs_flags = FS_REQUIRES_DEV,
-+};
-+#else
-+static struct super_block *yaffs2_read_super(struct super_block *sb,
-+ void *data, int silent)
-+{
-+ return yaffs_internal_read_super(2, sb, data, silent);
-+}
-+
-+static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super,
-+ FS_REQUIRES_DEV);
-+#endif
-+
-+
-+static struct proc_dir_entry *my_proc_entry;
-+
-+static char *yaffs_dump_dev_part0(char *buf, struct yaffs_dev *dev)
-+{
-+ struct yaffs_param *param = &dev->param;
-+ int bs[10];
-+
-+ yaffs_count_blocks_by_state(dev,bs);
-+
-+ buf += sprintf(buf, "start_block.......... %d\n", param->start_block);
-+ buf += sprintf(buf, "end_block............ %d\n", param->end_block);
-+ buf += sprintf(buf, "total_bytes_per_chunk %d\n",
-+ param->total_bytes_per_chunk);
-+ buf += sprintf(buf, "use_nand_ecc......... %d\n", param->use_nand_ecc);
-+ buf += sprintf(buf, "no_tags_ecc.......... %d\n", param->no_tags_ecc);
-+ buf += sprintf(buf, "is_yaffs2............ %d\n", param->is_yaffs2);
-+ buf += sprintf(buf, "inband_tags.......... %d\n", param->inband_tags);
-+ buf += sprintf(buf, "empty_lost_n_found... %d\n",
-+ param->empty_lost_n_found);
-+ buf += sprintf(buf, "disable_lazy_load.... %d\n",
-+ param->disable_lazy_load);
-+ buf += sprintf(buf, "disable_bad_block_mrk %d\n",
-+ param->disable_bad_block_marking);
-+ buf += sprintf(buf, "refresh_period....... %d\n",
-+ param->refresh_period);
-+ buf += sprintf(buf, "n_caches............. %d\n", param->n_caches);
-+ buf += sprintf(buf, "n_reserved_blocks.... %d\n",
-+ param->n_reserved_blocks);
-+ buf += sprintf(buf, "always_check_erased.. %d\n",
-+ param->always_check_erased);
-+ buf += sprintf(buf, "\n");
-+ buf += sprintf(buf, "block count by state\n");
-+ buf += sprintf(buf, "0:%d 1:%d 2:%d 3:%d 4:%d\n",
-+ bs[0], bs[1], bs[2], bs[3], bs[4]);
-+ buf += sprintf(buf, "5:%d 6:%d 7:%d 8:%d 9:%d\n",
-+ bs[5], bs[6], bs[7], bs[8], bs[9]);
-+
-+ return buf;
-+}
-+
-+static char *yaffs_dump_dev_part1(char *buf, struct yaffs_dev *dev)
-+{
-+ buf += sprintf(buf, "max file size....... %lld\n",
-+ (long long) yaffs_max_file_size(dev));
-+ buf += sprintf(buf, "data_bytes_per_chunk. %d\n",
-+ dev->data_bytes_per_chunk);
-+ buf += sprintf(buf, "chunk_grp_bits....... %d\n", dev->chunk_grp_bits);
-+ buf += sprintf(buf, "chunk_grp_size....... %d\n", dev->chunk_grp_size);
-+ buf += sprintf(buf, "n_erased_blocks...... %d\n", dev->n_erased_blocks);
-+ buf += sprintf(buf, "blocks_in_checkpt.... %d\n",
-+ dev->blocks_in_checkpt);
-+ buf += sprintf(buf, "\n");
-+ buf += sprintf(buf, "n_tnodes............. %d\n", dev->n_tnodes);
-+ buf += sprintf(buf, "n_obj................ %d\n", dev->n_obj);
-+ buf += sprintf(buf, "n_free_chunks........ %d\n", dev->n_free_chunks);
-+ buf += sprintf(buf, "\n");
-+ buf += sprintf(buf, "n_page_writes........ %u\n", dev->n_page_writes);
-+ buf += sprintf(buf, "n_page_reads......... %u\n", dev->n_page_reads);
-+ buf += sprintf(buf, "n_erasures........... %u\n", dev->n_erasures);
-+ buf += sprintf(buf, "n_gc_copies.......... %u\n", dev->n_gc_copies);
-+ buf += sprintf(buf, "all_gcs.............. %u\n", dev->all_gcs);
-+ buf += sprintf(buf, "passive_gc_count..... %u\n",
-+ dev->passive_gc_count);
-+ buf += sprintf(buf, "oldest_dirty_gc_count %u\n",
-+ dev->oldest_dirty_gc_count);
-+ buf += sprintf(buf, "n_gc_blocks.......... %u\n", dev->n_gc_blocks);
-+ buf += sprintf(buf, "bg_gcs............... %u\n", dev->bg_gcs);
-+ buf += sprintf(buf, "n_retried_writes..... %u\n",
-+ dev->n_retried_writes);
-+ buf += sprintf(buf, "n_retired_blocks..... %u\n",
-+ dev->n_retired_blocks);
-+ buf += sprintf(buf, "n_ecc_fixed.......... %u\n", dev->n_ecc_fixed);
-+ buf += sprintf(buf, "n_ecc_unfixed........ %u\n", dev->n_ecc_unfixed);
-+ buf += sprintf(buf, "n_tags_ecc_fixed..... %u\n",
-+ dev->n_tags_ecc_fixed);
-+ buf += sprintf(buf, "n_tags_ecc_unfixed... %u\n",
-+ dev->n_tags_ecc_unfixed);
-+ buf += sprintf(buf, "cache_hits........... %u\n", dev->cache_hits);
-+ buf += sprintf(buf, "n_deleted_files...... %u\n", dev->n_deleted_files);
-+ buf += sprintf(buf, "n_unlinked_files..... %u\n",
-+ dev->n_unlinked_files);
-+ buf += sprintf(buf, "refresh_count........ %u\n", dev->refresh_count);
-+ buf += sprintf(buf, "n_bg_deletions....... %u\n", dev->n_bg_deletions);
-+ buf += sprintf(buf, "tags_used............ %u\n", dev->tags_used);
-+ buf += sprintf(buf, "summary_used......... %u\n", dev->summary_used);
-+
-+ return buf;
-+}
-+
-+static int yaffs_proc_read(char *page,
-+ char **start,
-+ off_t offset, int count, int *eof, void *data)
-+{
-+ struct list_head *item;
-+ char *buf = page;
-+ int step = offset;
-+ int n = 0;
-+
-+ /* Get proc_file_read() to step 'offset' by one on each sucessive call.
-+ * We use 'offset' (*ppos) to indicate where we are in dev_list.
-+ * This also assumes the user has posted a read buffer large
-+ * enough to hold the complete output; but that's life in /proc.
-+ */
-+
-+ *(int *)start = 1;
-+
-+ /* Print header first */
-+ if (step == 0)
-+ buf +=
-+ sprintf(buf,
-+ "Multi-version YAFFS\n");
-+ else if (step == 1)
-+ buf += sprintf(buf, "\n");
-+ else {
-+ step -= 2;
-+
-+ mutex_lock(&yaffs_context_lock);
-+
-+ /* Locate and print the Nth entry. Order N-squared but N is small. */
-+ list_for_each(item, &yaffs_context_list) {
-+ struct yaffs_linux_context *dc =
-+ list_entry(item, struct yaffs_linux_context,
-+ context_list);
-+ struct yaffs_dev *dev = dc->dev;
-+
-+ if (n < (step & ~1)) {
-+ n += 2;
-+ continue;
-+ }
-+ if ((step & 1) == 0) {
-+ buf +=
-+ sprintf(buf, "\nDevice %d \"%s\"\n", n,
-+ dev->param.name);
-+ buf = yaffs_dump_dev_part0(buf, dev);
-+ } else {
-+ buf = yaffs_dump_dev_part1(buf, dev);
-+ }
-+
-+ break;
-+ }
-+ mutex_unlock(&yaffs_context_lock);
-+ }
-+
-+ return buf - page < count ? buf - page : count;
-+}
-+
-+/**
-+ * Set the verbosity of the warnings and error messages.
-+ *
-+ * Note that the names can only be a..z or _ with the current code.
-+ */
-+
-+static struct {
-+ char *mask_name;
-+ unsigned mask_bitfield;
-+} mask_flags[] = {
-+ {"allocate", YAFFS_TRACE_ALLOCATE},
-+ {"always", YAFFS_TRACE_ALWAYS},
-+ {"background", YAFFS_TRACE_BACKGROUND},
-+ {"bad_blocks", YAFFS_TRACE_BAD_BLOCKS},
-+ {"buffers", YAFFS_TRACE_BUFFERS},
-+ {"bug", YAFFS_TRACE_BUG},
-+ {"checkpt", YAFFS_TRACE_CHECKPOINT},
-+ {"deletion", YAFFS_TRACE_DELETION},
-+ {"erase", YAFFS_TRACE_ERASE},
-+ {"error", YAFFS_TRACE_ERROR},
-+ {"gc_detail", YAFFS_TRACE_GC_DETAIL},
-+ {"gc", YAFFS_TRACE_GC},
-+ {"lock", YAFFS_TRACE_LOCK},
-+ {"mtd", YAFFS_TRACE_MTD},
-+ {"nandaccess", YAFFS_TRACE_NANDACCESS},
-+ {"os", YAFFS_TRACE_OS},
-+ {"scan_debug", YAFFS_TRACE_SCAN_DEBUG},
-+ {"scan", YAFFS_TRACE_SCAN},
-+ {"mount", YAFFS_TRACE_MOUNT},
-+ {"tracing", YAFFS_TRACE_TRACING},
-+ {"sync", YAFFS_TRACE_SYNC},
-+ {"write", YAFFS_TRACE_WRITE},
-+ {"verify", YAFFS_TRACE_VERIFY},
-+ {"verify_nand", YAFFS_TRACE_VERIFY_NAND},
-+ {"verify_full", YAFFS_TRACE_VERIFY_FULL},
-+ {"verify_all", YAFFS_TRACE_VERIFY_ALL},
-+ {"all", 0xffffffff},
-+ {"none", 0},
-+ {NULL, 0},
-+};
-+
-+#define MAX_MASK_NAME_LENGTH 40
-+static int yaffs_proc_write_trace_options(struct file *file, const char *buf,
-+ unsigned long count)
-+{
-+ unsigned rg = 0, mask_bitfield;
-+ char *end;
-+ char *mask_name;
-+ const char *x;
-+ char substring[MAX_MASK_NAME_LENGTH + 1];
-+ int i;
-+ int done = 0;
-+ int add, len = 0;
-+ int pos = 0;
-+
-+ rg = yaffs_trace_mask;
-+
-+ while (!done && (pos < count)) {
-+ done = 1;
-+ while ((pos < count) && isspace(buf[pos]))
-+ pos++;
-+
-+ switch (buf[pos]) {
-+ case '+':
-+ case '-':
-+ case '=':
-+ add = buf[pos];
-+ pos++;
-+ break;
-+
-+ default:
-+ add = ' ';
-+ break;
-+ }
-+ mask_name = NULL;
-+
-+ mask_bitfield = simple_strtoul(buf + pos, &end, 0);
-+
-+ if (end > buf + pos) {
-+ mask_name = "numeral";
-+ len = end - (buf + pos);
-+ pos += len;
-+ done = 0;
-+ } else {
-+ for (x = buf + pos, i = 0;
-+ (*x == '_' || (*x >= 'a' && *x <= 'z')) &&
-+ i < MAX_MASK_NAME_LENGTH; x++, i++, pos++)
-+ substring[i] = *x;
-+ substring[i] = '\0';
-+
-+ for (i = 0; mask_flags[i].mask_name != NULL; i++) {
-+ if (strcmp(substring, mask_flags[i].mask_name)
-+ == 0) {
-+ mask_name = mask_flags[i].mask_name;
-+ mask_bitfield =
-+ mask_flags[i].mask_bitfield;
-+ done = 0;
-+ break;
-+ }
-+ }
-+ }
-+
-+ if (mask_name != NULL) {
-+ done = 0;
-+ switch (add) {
-+ case '-':
-+ rg &= ~mask_bitfield;
-+ break;
-+ case '+':
-+ rg |= mask_bitfield;
-+ break;
-+ case '=':
-+ rg = mask_bitfield;
-+ break;
-+ default:
-+ rg |= mask_bitfield;
-+ break;
-+ }
-+ }
-+ }
-+
-+ yaffs_trace_mask = rg | YAFFS_TRACE_ALWAYS;
-+
-+ printk(KERN_DEBUG "new trace = 0x%08X\n", yaffs_trace_mask);
-+
-+ if (rg & YAFFS_TRACE_ALWAYS) {
-+ for (i = 0; mask_flags[i].mask_name != NULL; i++) {
-+ char flag;
-+ flag = ((rg & mask_flags[i].mask_bitfield) ==
-+ mask_flags[i].mask_bitfield) ? '+' : '-';
-+ printk(KERN_DEBUG "%c%s\n", flag,
-+ mask_flags[i].mask_name);
-+ }
-+ }
-+
-+ return count;
-+}
-+
-+/* Debug strings are of the form:
-+ * .bnnn print info on block n
-+ * .cobjn,chunkn print nand chunk id for objn:chunkn
-+ */
-+
-+static int yaffs_proc_debug_write(struct file *file, const char *buf,
-+ unsigned long count)
-+{
-+
-+ char str[100];
-+ char *p0;
-+ char *p1;
-+ long p1_val;
-+ long p0_val;
-+ char cmd;
-+ struct list_head *item;
-+
-+ memset(str, 0, sizeof(str));
-+ memcpy(str, buf, min((size_t)count, sizeof(str) -1));
-+
-+ cmd = str[1];
-+
-+ p0 = str + 2;
-+
-+ p1 = p0;
-+
-+ while (*p1 && *p1 != ',') {
-+ p1++;
-+ }
-+ *p1 = '\0';
-+ p1++;
-+
-+ p0_val = simple_strtol(p0, NULL, 0);
-+ p1_val = simple_strtol(p1, NULL, 0);
-+
-+
-+ mutex_lock(&yaffs_context_lock);
-+
-+ /* Locate and print the Nth entry. Order N-squared but N is small. */
-+ list_for_each(item, &yaffs_context_list) {
-+ struct yaffs_linux_context *dc =
-+ list_entry(item, struct yaffs_linux_context,
-+ context_list);
-+ struct yaffs_dev *dev = dc->dev;
-+
-+ if (cmd == 'b') {
-+ struct yaffs_block_info *bi;
-+
-+ bi = yaffs_get_block_info(dev,p0_val);
-+
-+ if(bi) {
-+ printk("Block %d: state %d, retire %d, use %d, seq %d\n",
-+ (int)p0_val, bi->block_state,
-+ bi->needs_retiring, bi->pages_in_use,
-+ bi->seq_number);
-+ }
-+ } else if (cmd == 'c') {
-+ struct yaffs_obj *obj;
-+ int nand_chunk;
-+
-+ obj = yaffs_find_by_number(dev, p0_val);
-+ if (!obj)
-+ printk("No obj %d\n", (int)p0_val);
-+ else {
-+ if(p1_val == 0)
-+ nand_chunk = obj->hdr_chunk;
-+ else
-+ nand_chunk =
-+ yaffs_find_chunk_in_file(obj,
-+ p1_val, NULL);
-+ printk("Nand chunk for %d:%d is %d\n",
-+ (int)p0_val, (int)p1_val, nand_chunk);
-+ }
-+ }
-+ }
-+
-+ mutex_unlock(&yaffs_context_lock);
-+
-+ return count;
-+}
-+
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 14, 0))
-+static int yaffs_proc_write(struct file *file, const char *buf,
-+ unsigned long count, void *ppos)
-+#else
-+static ssize_t yaffs_proc_write(struct file *file, const char __user *buf,
-+ size_t count, loff_t *ppos)
-+#endif
-+{
-+ if (buf[0] == '.')
-+ return yaffs_proc_debug_write(file, buf, count);
-+ return yaffs_proc_write_trace_options(file, buf, count);
-+}
-+
-+/* Stuff to handle installation of file systems */
-+struct file_system_to_install {
-+ struct file_system_type *fst;
-+ int installed;
-+};
-+
-+static struct file_system_to_install fs_to_install[] = {
-+ {&yaffs_fs_type, 0},
-+ {&yaffs2_fs_type, 0},
-+ {NULL, 0}
-+};
-+
-+
-+#ifdef YAFFS_NEW_PROCFS
-+static int yaffs_proc_show(struct seq_file *m, void *v)
-+{
-+ /* FIXME: Unify in a better way? */
-+ char buffer[512];
-+ char *start;
-+ int len;
-+
-+ len = yaffs_proc_read(buffer, &start, 0, sizeof(buffer), NULL, NULL);
-+ seq_puts(m, buffer);
-+ return 0;
-+}
-+
-+static int yaffs_proc_open(struct inode *inode, struct file *file)
-+{
-+ return single_open(file, yaffs_proc_show, NULL);
-+}
-+
-+static struct file_operations procfs_ops = {
-+ .owner = THIS_MODULE,
-+ .open = yaffs_proc_open,
-+ .read = seq_read,
-+ .write = yaffs_proc_write,
-+};
-+
-+static int yaffs_procfs_init(void)
-+{
-+ /* Install the proc_fs entries */
-+ my_proc_entry = proc_create("yaffs",
-+ S_IRUGO | S_IFREG,
-+ YPROC_ROOT,
-+ &procfs_ops);
-+
-+ if (my_proc_entry) {
-+ return 0;
-+ } else {
-+ return -ENOMEM;
-+ }
-+}
-+
-+#else
-+
-+
-+static int yaffs_procfs_init(void)
-+{
-+ /* Install the proc_fs entries */
-+ my_proc_entry = create_proc_entry("yaffs",
-+ S_IRUGO | S_IFREG, YPROC_ROOT);
-+
-+ if (my_proc_entry) {
-+ my_proc_entry->write_proc = yaffs_proc_write;
-+ my_proc_entry->read_proc = yaffs_proc_read;
-+ my_proc_entry->data = NULL;
-+ return 0;
-+ } else {
-+ return -ENOMEM;
-+ }
-+}
-+
-+#endif
-+
-+
-+static int __init init_yaffs_fs(void)
-+{
-+ int error = 0;
-+ struct file_system_to_install *fsinst;
-+
-+ mutex_init(&yaffs_context_lock);
-+
-+ error = yaffs_procfs_init();
-+ if (error)
-+ return error;
-+
-+ /* Now add the file system entries */
-+
-+ fsinst = fs_to_install;
-+
-+ while (fsinst->fst && !error) {
-+ error = register_filesystem(fsinst->fst);
-+ if (!error)
-+ fsinst->installed = 1;
-+ fsinst++;
-+ }
-+
-+ /* Any errors? uninstall */
-+ if (error) {
-+ fsinst = fs_to_install;
-+
-+ while (fsinst->fst) {
-+ if (fsinst->installed) {
-+ unregister_filesystem(fsinst->fst);
-+ fsinst->installed = 0;
-+ }
-+ fsinst++;
-+ }
-+ }
-+
-+ return error;
-+}
-+
-+static void __exit exit_yaffs_fs(void)
-+{
-+
-+ struct file_system_to_install *fsinst;
-+
-+ remove_proc_entry("yaffs", YPROC_ROOT);
-+
-+ fsinst = fs_to_install;
-+
-+ while (fsinst->fst) {
-+ if (fsinst->installed) {
-+ unregister_filesystem(fsinst->fst);
-+ fsinst->installed = 0;
-+ }
-+ fsinst++;
-+ }
-+}
-+
-+module_init(init_yaffs_fs)
-+ module_exit(exit_yaffs_fs)
-+
-+ MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system");
-+MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2011");
-+MODULE_LICENSE("GPL");
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_yaffs1.c linux-3.18.14/fs/yaffs2/yaffs_yaffs1.c
---- linux-3.18.14.orig/fs/yaffs2/yaffs_yaffs1.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_yaffs1.c 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,422 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_yaffs1.h"
-+#include "yportenv.h"
-+#include "yaffs_trace.h"
-+#include "yaffs_bitmap.h"
-+#include "yaffs_getblockinfo.h"
-+#include "yaffs_nand.h"
-+#include "yaffs_attribs.h"
-+
-+int yaffs1_scan(struct yaffs_dev *dev)
-+{
-+ struct yaffs_ext_tags tags;
-+ int blk;
-+ int result;
-+ int chunk;
-+ int c;
-+ int deleted;
-+ enum yaffs_block_state state;
-+ LIST_HEAD(hard_list);
-+ struct yaffs_block_info *bi;
-+ u32 seq_number;
-+ struct yaffs_obj_hdr *oh;
-+ struct yaffs_obj *in;
-+ struct yaffs_obj *parent;
-+ int alloc_failed = 0;
-+ struct yaffs_shadow_fixer *shadow_fixers = NULL;
-+ u8 *chunk_data;
-+
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ "yaffs1_scan starts intstartblk %d intendblk %d...",
-+ dev->internal_start_block, dev->internal_end_block);
-+
-+ chunk_data = yaffs_get_temp_buffer(dev);
-+
-+ dev->seq_number = YAFFS_LOWEST_SEQUENCE_NUMBER;
-+
-+ /* Scan all the blocks to determine their state */
-+ bi = dev->block_info;
-+ for (blk = dev->internal_start_block; blk <= dev->internal_end_block;
-+ blk++) {
-+ yaffs_clear_chunk_bits(dev, blk);
-+ bi->pages_in_use = 0;
-+ bi->soft_del_pages = 0;
-+
-+ yaffs_query_init_block_state(dev, blk, &state, &seq_number);
-+
-+ bi->block_state = state;
-+ bi->seq_number = seq_number;
-+
-+ if (bi->seq_number == YAFFS_SEQUENCE_BAD_BLOCK)
-+ bi->block_state = state = YAFFS_BLOCK_STATE_DEAD;
-+
-+ yaffs_trace(YAFFS_TRACE_SCAN_DEBUG,
-+ "Block scanning block %d state %d seq %d",
-+ blk, state, seq_number);
-+
-+ if (state == YAFFS_BLOCK_STATE_DEAD) {
-+ yaffs_trace(YAFFS_TRACE_BAD_BLOCKS,
-+ "block %d is bad", blk);
-+ } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
-+ yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, "Block empty ");
-+ dev->n_erased_blocks++;
-+ dev->n_free_chunks += dev->param.chunks_per_block;
-+ }
-+ bi++;
-+ }
-+
-+ /* For each block.... */
-+ for (blk = dev->internal_start_block;
-+ !alloc_failed && blk <= dev->internal_end_block; blk++) {
-+
-+ cond_resched();
-+
-+ bi = yaffs_get_block_info(dev, blk);
-+ state = bi->block_state;
-+
-+ deleted = 0;
-+
-+ /* For each chunk in each block that needs scanning.... */
-+ for (c = 0;
-+ !alloc_failed && c < dev->param.chunks_per_block &&
-+ state == YAFFS_BLOCK_STATE_NEEDS_SCAN; c++) {
-+ /* Read the tags and decide what to do */
-+ chunk = blk * dev->param.chunks_per_block + c;
-+
-+ result = yaffs_rd_chunk_tags_nand(dev, chunk, NULL,
-+ &tags);
-+
-+ /* Let's have a good look at this chunk... */
-+
-+ if (tags.ecc_result == YAFFS_ECC_RESULT_UNFIXED ||
-+ tags.is_deleted) {
-+ /* YAFFS1 only...
-+ * A deleted chunk
-+ */
-+ deleted++;
-+ dev->n_free_chunks++;
-+ } else if (!tags.chunk_used) {
-+ /* An unassigned chunk in the block
-+ * This means that either the block is empty or
-+ * this is the one being allocated from
-+ */
-+
-+ if (c == 0) {
-+ /* We're looking at the first chunk in
-+ *the block so the block is unused */
-+ state = YAFFS_BLOCK_STATE_EMPTY;
-+ dev->n_erased_blocks++;
-+ } else {
-+ /* this is the block being allocated */
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ " Allocating from %d %d",
-+ blk, c);
-+ state = YAFFS_BLOCK_STATE_ALLOCATING;
-+ dev->alloc_block = blk;
-+ dev->alloc_page = c;
-+ dev->alloc_block_finder = blk;
-+
-+ }
-+
-+ dev->n_free_chunks +=
-+ (dev->param.chunks_per_block - c);
-+ } else if (tags.chunk_id > 0) {
-+ /* chunk_id > 0 so it is a data chunk... */
-+ unsigned int endpos;
-+
-+ yaffs_set_chunk_bit(dev, blk, c);
-+ bi->pages_in_use++;
-+
-+ in = yaffs_find_or_create_by_number(dev,
-+ tags.obj_id,
-+ YAFFS_OBJECT_TYPE_FILE);
-+ /* PutChunkIntoFile checks for a clash
-+ * (two data chunks with the same chunk_id).
-+ */
-+
-+ if (!in)
-+ alloc_failed = 1;
-+
-+ if (in) {
-+ if (!yaffs_put_chunk_in_file
-+ (in, tags.chunk_id, chunk, 1))
-+ alloc_failed = 1;
-+ }
-+
-+ endpos =
-+ (tags.chunk_id - 1) *
-+ dev->data_bytes_per_chunk +
-+ tags.n_bytes;
-+ if (in &&
-+ in->variant_type ==
-+ YAFFS_OBJECT_TYPE_FILE &&
-+ in->variant.file_variant.scanned_size <
-+ endpos) {
-+ in->variant.file_variant.scanned_size =
-+ endpos;
-+ if (!dev->param.use_header_file_size) {
-+ in->variant.
-+ file_variant.file_size =
-+ in->variant.
-+ file_variant.scanned_size;
-+ }
-+
-+ }
-+ } else {
-+ /* chunk_id == 0, so it is an ObjectHeader.
-+ * Make the object
-+ */
-+ yaffs_set_chunk_bit(dev, blk, c);
-+ bi->pages_in_use++;
-+
-+ result = yaffs_rd_chunk_tags_nand(dev, chunk,
-+ chunk_data,
-+ NULL);
-+
-+ oh = (struct yaffs_obj_hdr *)chunk_data;
-+
-+ in = yaffs_find_by_number(dev, tags.obj_id);
-+ if (in && in->variant_type != oh->type) {
-+ /* This should not happen, but somehow
-+ * Wev'e ended up with an obj_id that
-+ * has been reused but not yet deleted,
-+ * and worse still it has changed type.
-+ * Delete the old object.
-+ */
-+
-+ yaffs_del_obj(in);
-+ in = NULL;
-+ }
-+
-+ in = yaffs_find_or_create_by_number(dev,
-+ tags.obj_id,
-+ oh->type);
-+
-+ if (!in)
-+ alloc_failed = 1;
-+
-+ if (in && oh->shadows_obj > 0) {
-+
-+ struct yaffs_shadow_fixer *fixer;
-+ fixer =
-+ kmalloc(sizeof
-+ (struct yaffs_shadow_fixer),
-+ GFP_NOFS);
-+ if (fixer) {
-+ fixer->next = shadow_fixers;
-+ shadow_fixers = fixer;
-+ fixer->obj_id = tags.obj_id;
-+ fixer->shadowed_id =
-+ oh->shadows_obj;
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ " Shadow fixer: %d shadows %d",
-+ fixer->obj_id,
-+ fixer->shadowed_id);
-+
-+ }
-+
-+ }
-+
-+ if (in && in->valid) {
-+ /* We have already filled this one.
-+ * We have a duplicate and need to
-+ * resolve it. */
-+
-+ unsigned existing_serial = in->serial;
-+ unsigned new_serial =
-+ tags.serial_number;
-+
-+ if (((existing_serial + 1) & 3) ==
-+ new_serial) {
-+ /* Use new one - destroy the
-+ * exisiting one */
-+ yaffs_chunk_del(dev,
-+ in->hdr_chunk,
-+ 1, __LINE__);
-+ in->valid = 0;
-+ } else {
-+ /* Use existing - destroy
-+ * this one. */
-+ yaffs_chunk_del(dev, chunk, 1,
-+ __LINE__);
-+ }
-+ }
-+
-+ if (in && !in->valid &&
-+ (tags.obj_id == YAFFS_OBJECTID_ROOT ||
-+ tags.obj_id ==
-+ YAFFS_OBJECTID_LOSTNFOUND)) {
-+ /* We only load some info, don't fiddle
-+ * with directory structure */
-+ in->valid = 1;
-+ in->variant_type = oh->type;
-+
-+ in->yst_mode = oh->yst_mode;
-+ yaffs_load_attribs(in, oh);
-+ in->hdr_chunk = chunk;
-+ in->serial = tags.serial_number;
-+
-+ } else if (in && !in->valid) {
-+ /* we need to load this info */
-+
-+ in->valid = 1;
-+ in->variant_type = oh->type;
-+
-+ in->yst_mode = oh->yst_mode;
-+ yaffs_load_attribs(in, oh);
-+ in->hdr_chunk = chunk;
-+ in->serial = tags.serial_number;
-+
-+ yaffs_set_obj_name_from_oh(in, oh);
-+ in->dirty = 0;
-+
-+ /* directory stuff...
-+ * hook up to parent
-+ */
-+
-+ parent =
-+ yaffs_find_or_create_by_number
-+ (dev, oh->parent_obj_id,
-+ YAFFS_OBJECT_TYPE_DIRECTORY);
-+ if (!parent)
-+ alloc_failed = 1;
-+ if (parent && parent->variant_type ==
-+ YAFFS_OBJECT_TYPE_UNKNOWN) {
-+ /* Set up as a directory */
-+ parent->variant_type =
-+ YAFFS_OBJECT_TYPE_DIRECTORY;
-+ INIT_LIST_HEAD(&parent->
-+ variant.dir_variant.
-+ children);
-+ } else if (!parent ||
-+ parent->variant_type !=
-+ YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ /* Hoosterman, a problem....
-+ * We're trying to use a
-+ * non-directory as a directory
-+ */
-+
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
-+ );
-+ parent = dev->lost_n_found;
-+ }
-+
-+ yaffs_add_obj_to_dir(parent, in);
-+
-+ switch (in->variant_type) {
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ /* Todo got a problem */
-+ break;
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ if (dev->param.
-+ use_header_file_size)
-+ in->variant.
-+ file_variant.file_size
-+ = yaffs_oh_to_size(oh);
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ in->variant.
-+ hardlink_variant.equiv_id =
-+ oh->equiv_id;
-+ list_add(&in->hard_links,
-+ &hard_list);
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ /* Do nothing */
-+ break;
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ /* Do nothing */
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ in->variant.symlink_variant.
-+ alias =
-+ yaffs_clone_str(oh->alias);
-+ if (!in->variant.
-+ symlink_variant.alias)
-+ alloc_failed = 1;
-+ break;
-+ }
-+ }
-+ }
-+ }
-+
-+ if (state == YAFFS_BLOCK_STATE_NEEDS_SCAN) {
-+ /* If we got this far while scanning,
-+ * then the block is fully allocated. */
-+ state = YAFFS_BLOCK_STATE_FULL;
-+ }
-+
-+ if (state == YAFFS_BLOCK_STATE_ALLOCATING) {
-+ /* If the block was partially allocated then
-+ * treat it as fully allocated. */
-+ state = YAFFS_BLOCK_STATE_FULL;
-+ dev->alloc_block = -1;
-+ }
-+
-+ bi->block_state = state;
-+
-+ /* Now let's see if it was dirty */
-+ if (bi->pages_in_use == 0 &&
-+ !bi->has_shrink_hdr &&
-+ bi->block_state == YAFFS_BLOCK_STATE_FULL)
-+ yaffs_block_became_dirty(dev, blk);
-+ }
-+
-+ /* Ok, we've done all the scanning.
-+ * Fix up the hard link chains.
-+ * We should now have scanned all the objects, now it's time to add
-+ * these hardlinks.
-+ */
-+
-+ yaffs_link_fixup(dev, &hard_list);
-+
-+ /*
-+ * Fix up any shadowed objects.
-+ * There should not be more than one of these.
-+ */
-+ {
-+ struct yaffs_shadow_fixer *fixer;
-+ struct yaffs_obj *obj;
-+
-+ while (shadow_fixers) {
-+ fixer = shadow_fixers;
-+ shadow_fixers = fixer->next;
-+ /* Complete the rename transaction by deleting the
-+ * shadowed object then setting the object header
-+ to unshadowed.
-+ */
-+ obj = yaffs_find_by_number(dev, fixer->shadowed_id);
-+ if (obj)
-+ yaffs_del_obj(obj);
-+
-+ obj = yaffs_find_by_number(dev, fixer->obj_id);
-+
-+ if (obj)
-+ yaffs_update_oh(obj, NULL, 1, 0, 0, NULL);
-+
-+ kfree(fixer);
-+ }
-+ }
-+
-+ yaffs_release_temp_buffer(dev, chunk_data);
-+
-+ if (alloc_failed)
-+ return YAFFS_FAIL;
-+
-+ yaffs_trace(YAFFS_TRACE_SCAN, "yaffs1_scan ends");
-+
-+ return YAFFS_OK;
-+}
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_yaffs1.h linux-3.18.14/fs/yaffs2/yaffs_yaffs1.h
---- linux-3.18.14.orig/fs/yaffs2/yaffs_yaffs1.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_yaffs1.h 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,22 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_YAFFS1_H__
-+#define __YAFFS_YAFFS1_H__
-+
-+#include "yaffs_guts.h"
-+int yaffs1_scan(struct yaffs_dev *dev);
-+
-+#endif
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_yaffs2.c linux-3.18.14/fs/yaffs2/yaffs_yaffs2.c
---- linux-3.18.14.orig/fs/yaffs2/yaffs_yaffs2.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_yaffs2.c 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,1532 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_guts.h"
-+#include "yaffs_trace.h"
-+#include "yaffs_yaffs2.h"
-+#include "yaffs_checkptrw.h"
-+#include "yaffs_bitmap.h"
-+#include "yaffs_nand.h"
-+#include "yaffs_getblockinfo.h"
-+#include "yaffs_verify.h"
-+#include "yaffs_attribs.h"
-+#include "yaffs_summary.h"
-+
-+/*
-+ * Checkpoints are really no benefit on very small partitions.
-+ *
-+ * To save space on small partitions don't bother with checkpoints unless
-+ * the partition is at least this big.
-+ */
-+#define YAFFS_CHECKPOINT_MIN_BLOCKS 60
-+#define YAFFS_SMALL_HOLE_THRESHOLD 4
-+
-+/*
-+ * Oldest Dirty Sequence Number handling.
-+ */
-+
-+/* yaffs_calc_oldest_dirty_seq()
-+ * yaffs2_find_oldest_dirty_seq()
-+ * Calculate the oldest dirty sequence number if we don't know it.
-+ */
-+void yaffs_calc_oldest_dirty_seq(struct yaffs_dev *dev)
-+{
-+ int i;
-+ unsigned seq;
-+ unsigned block_no = 0;
-+ struct yaffs_block_info *b;
-+
-+ if (!dev->param.is_yaffs2)
-+ return;
-+
-+ /* Find the oldest dirty sequence number. */
-+ seq = dev->seq_number + 1;
-+ b = dev->block_info;
-+ for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
-+ if (b->block_state == YAFFS_BLOCK_STATE_FULL &&
-+ (b->pages_in_use - b->soft_del_pages) <
-+ dev->param.chunks_per_block &&
-+ b->seq_number < seq) {
-+ seq = b->seq_number;
-+ block_no = i;
-+ }
-+ b++;
-+ }
-+
-+ if (block_no) {
-+ dev->oldest_dirty_seq = seq;
-+ dev->oldest_dirty_block = block_no;
-+ }
-+}
-+
-+void yaffs2_find_oldest_dirty_seq(struct yaffs_dev *dev)
-+{
-+ if (!dev->param.is_yaffs2)
-+ return;
-+
-+ if (!dev->oldest_dirty_seq)
-+ yaffs_calc_oldest_dirty_seq(dev);
-+}
-+
-+/*
-+ * yaffs_clear_oldest_dirty_seq()
-+ * Called when a block is erased or marked bad. (ie. when its seq_number
-+ * becomes invalid). If the value matches the oldest then we clear
-+ * dev->oldest_dirty_seq to force its recomputation.
-+ */
-+void yaffs2_clear_oldest_dirty_seq(struct yaffs_dev *dev,
-+ struct yaffs_block_info *bi)
-+{
-+
-+ if (!dev->param.is_yaffs2)
-+ return;
-+
-+ if (!bi || bi->seq_number == dev->oldest_dirty_seq) {
-+ dev->oldest_dirty_seq = 0;
-+ dev->oldest_dirty_block = 0;
-+ }
-+}
-+
-+/*
-+ * yaffs2_update_oldest_dirty_seq()
-+ * Update the oldest dirty sequence number whenever we dirty a block.
-+ * Only do this if the oldest_dirty_seq is actually being tracked.
-+ */
-+void yaffs2_update_oldest_dirty_seq(struct yaffs_dev *dev, unsigned block_no,
-+ struct yaffs_block_info *bi)
-+{
-+ if (!dev->param.is_yaffs2)
-+ return;
-+
-+ if (dev->oldest_dirty_seq) {
-+ if (dev->oldest_dirty_seq > bi->seq_number) {
-+ dev->oldest_dirty_seq = bi->seq_number;
-+ dev->oldest_dirty_block = block_no;
-+ }
-+ }
-+}
-+
-+int yaffs_block_ok_for_gc(struct yaffs_dev *dev, struct yaffs_block_info *bi)
-+{
-+
-+ if (!dev->param.is_yaffs2)
-+ return 1; /* disqualification only applies to yaffs2. */
-+
-+ if (!bi->has_shrink_hdr)
-+ return 1; /* can gc */
-+
-+ yaffs2_find_oldest_dirty_seq(dev);
-+
-+ /* Can't do gc of this block if there are any blocks older than this
-+ * one that have discarded pages.
-+ */
-+ return (bi->seq_number <= dev->oldest_dirty_seq);
-+}
-+
-+/*
-+ * yaffs2_find_refresh_block()
-+ * periodically finds the oldest full block by sequence number for refreshing.
-+ * Only for yaffs2.
-+ */
-+u32 yaffs2_find_refresh_block(struct yaffs_dev *dev)
-+{
-+ u32 b;
-+ u32 oldest = 0;
-+ u32 oldest_seq = 0;
-+ struct yaffs_block_info *bi;
-+
-+ if (!dev->param.is_yaffs2)
-+ return oldest;
-+
-+ /*
-+ * If refresh period < 10 then refreshing is disabled.
-+ */
-+ if (dev->param.refresh_period < 10)
-+ return oldest;
-+
-+ /*
-+ * Fix broken values.
-+ */
-+ if (dev->refresh_skip > dev->param.refresh_period)
-+ dev->refresh_skip = dev->param.refresh_period;
-+
-+ if (dev->refresh_skip > 0)
-+ return oldest;
-+
-+ /*
-+ * Refresh skip is now zero.
-+ * We'll do a refresh this time around....
-+ * Update the refresh skip and find the oldest block.
-+ */
-+ dev->refresh_skip = dev->param.refresh_period;
-+ dev->refresh_count++;
-+ bi = dev->block_info;
-+ for (b = dev->internal_start_block; b <= dev->internal_end_block; b++) {
-+
-+ if (bi->block_state == YAFFS_BLOCK_STATE_FULL) {
-+
-+ if (oldest < 1 || bi->seq_number < oldest_seq) {
-+ oldest = b;
-+ oldest_seq = bi->seq_number;
-+ }
-+ }
-+ bi++;
-+ }
-+
-+ if (oldest > 0) {
-+ yaffs_trace(YAFFS_TRACE_GC,
-+ "GC refresh count %d selected block %d with seq_number %d",
-+ dev->refresh_count, oldest, oldest_seq);
-+ }
-+
-+ return oldest;
-+}
-+
-+int yaffs2_checkpt_required(struct yaffs_dev *dev)
-+{
-+ int nblocks;
-+
-+ if (!dev->param.is_yaffs2)
-+ return 0;
-+
-+ nblocks = dev->internal_end_block - dev->internal_start_block + 1;
-+
-+ return !dev->param.skip_checkpt_wr &&
-+ !dev->read_only && (nblocks >= YAFFS_CHECKPOINT_MIN_BLOCKS);
-+}
-+
-+int yaffs_calc_checkpt_blocks_required(struct yaffs_dev *dev)
-+{
-+ int retval;
-+ int n_bytes = 0;
-+ int n_blocks;
-+ int dev_blocks;
-+
-+ if (!dev->param.is_yaffs2)
-+ return 0;
-+
-+ if (!dev->checkpoint_blocks_required && yaffs2_checkpt_required(dev)) {
-+ /* Not a valid value so recalculate */
-+ dev_blocks = dev->param.end_block - dev->param.start_block + 1;
-+ n_bytes += sizeof(struct yaffs_checkpt_validity);
-+ n_bytes += sizeof(struct yaffs_checkpt_dev);
-+ n_bytes += dev_blocks * sizeof(struct yaffs_block_info);
-+ n_bytes += dev_blocks * dev->chunk_bit_stride;
-+ n_bytes +=
-+ (sizeof(struct yaffs_checkpt_obj) + sizeof(u32)) *
-+ dev->n_obj;
-+ n_bytes += (dev->tnode_size + sizeof(u32)) * dev->n_tnodes;
-+ n_bytes += sizeof(struct yaffs_checkpt_validity);
-+ n_bytes += sizeof(u32); /* checksum */
-+
-+ /* Round up and add 2 blocks to allow for some bad blocks,
-+ * so add 3 */
-+
-+ n_blocks =
-+ (n_bytes /
-+ (dev->data_bytes_per_chunk *
-+ dev->param.chunks_per_block)) + 3;
-+
-+ dev->checkpoint_blocks_required = n_blocks;
-+ }
-+
-+ retval = dev->checkpoint_blocks_required - dev->blocks_in_checkpt;
-+ if (retval < 0)
-+ retval = 0;
-+ return retval;
-+}
-+
-+/*--------------------- Checkpointing --------------------*/
-+
-+static int yaffs2_wr_checkpt_validity_marker(struct yaffs_dev *dev, int head)
-+{
-+ struct yaffs_checkpt_validity cp;
-+
-+ memset(&cp, 0, sizeof(cp));
-+
-+ cp.struct_type = sizeof(cp);
-+ cp.magic = YAFFS_MAGIC;
-+ cp.version = YAFFS_CHECKPOINT_VERSION;
-+ cp.head = (head) ? 1 : 0;
-+
-+ return (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp)) ? 1 : 0;
-+}
-+
-+static int yaffs2_rd_checkpt_validity_marker(struct yaffs_dev *dev, int head)
-+{
-+ struct yaffs_checkpt_validity cp;
-+ int ok;
-+
-+ ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp));
-+
-+ if (ok)
-+ ok = (cp.struct_type == sizeof(cp)) &&
-+ (cp.magic == YAFFS_MAGIC) &&
-+ (cp.version == YAFFS_CHECKPOINT_VERSION) &&
-+ (cp.head == ((head) ? 1 : 0));
-+ return ok ? 1 : 0;
-+}
-+
-+static void yaffs2_dev_to_checkpt_dev(struct yaffs_checkpt_dev *cp,
-+ struct yaffs_dev *dev)
-+{
-+ cp->n_erased_blocks = dev->n_erased_blocks;
-+ cp->alloc_block = dev->alloc_block;
-+ cp->alloc_page = dev->alloc_page;
-+ cp->n_free_chunks = dev->n_free_chunks;
-+
-+ cp->n_deleted_files = dev->n_deleted_files;
-+ cp->n_unlinked_files = dev->n_unlinked_files;
-+ cp->n_bg_deletions = dev->n_bg_deletions;
-+ cp->seq_number = dev->seq_number;
-+
-+}
-+
-+static void yaffs_checkpt_dev_to_dev(struct yaffs_dev *dev,
-+ struct yaffs_checkpt_dev *cp)
-+{
-+ dev->n_erased_blocks = cp->n_erased_blocks;
-+ dev->alloc_block = cp->alloc_block;
-+ dev->alloc_page = cp->alloc_page;
-+ dev->n_free_chunks = cp->n_free_chunks;
-+
-+ dev->n_deleted_files = cp->n_deleted_files;
-+ dev->n_unlinked_files = cp->n_unlinked_files;
-+ dev->n_bg_deletions = cp->n_bg_deletions;
-+ dev->seq_number = cp->seq_number;
-+}
-+
-+static int yaffs2_wr_checkpt_dev(struct yaffs_dev *dev)
-+{
-+ struct yaffs_checkpt_dev cp;
-+ u32 n_bytes;
-+ u32 n_blocks = dev->internal_end_block - dev->internal_start_block + 1;
-+ int ok;
-+
-+ /* Write device runtime values */
-+ yaffs2_dev_to_checkpt_dev(&cp, dev);
-+ cp.struct_type = sizeof(cp);
-+
-+ ok = (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp));
-+ if (!ok)
-+ return 0;
-+
-+ /* Write block info */
-+ n_bytes = n_blocks * sizeof(struct yaffs_block_info);
-+ ok = (yaffs2_checkpt_wr(dev, dev->block_info, n_bytes) == n_bytes);
-+ if (!ok)
-+ return 0;
-+
-+ /* Write chunk bits */
-+ n_bytes = n_blocks * dev->chunk_bit_stride;
-+ ok = (yaffs2_checkpt_wr(dev, dev->chunk_bits, n_bytes) == n_bytes);
-+
-+ return ok ? 1 : 0;
-+}
-+
-+static int yaffs2_rd_checkpt_dev(struct yaffs_dev *dev)
-+{
-+ struct yaffs_checkpt_dev cp;
-+ u32 n_bytes;
-+ u32 n_blocks =
-+ (dev->internal_end_block - dev->internal_start_block + 1);
-+ int ok;
-+
-+ ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp));
-+ if (!ok)
-+ return 0;
-+
-+ if (cp.struct_type != sizeof(cp))
-+ return 0;
-+
-+ yaffs_checkpt_dev_to_dev(dev, &cp);
-+
-+ n_bytes = n_blocks * sizeof(struct yaffs_block_info);
-+
-+ ok = (yaffs2_checkpt_rd(dev, dev->block_info, n_bytes) == n_bytes);
-+
-+ if (!ok)
-+ return 0;
-+
-+ n_bytes = n_blocks * dev->chunk_bit_stride;
-+
-+ ok = (yaffs2_checkpt_rd(dev, dev->chunk_bits, n_bytes) == n_bytes);
-+
-+ return ok ? 1 : 0;
-+}
-+
-+static void yaffs2_obj_checkpt_obj(struct yaffs_checkpt_obj *cp,
-+ struct yaffs_obj *obj)
-+{
-+ cp->obj_id = obj->obj_id;
-+ cp->parent_id = (obj->parent) ? obj->parent->obj_id : 0;
-+ cp->hdr_chunk = obj->hdr_chunk;
-+ cp->variant_type = obj->variant_type;
-+ cp->deleted = obj->deleted;
-+ cp->soft_del = obj->soft_del;
-+ cp->unlinked = obj->unlinked;
-+ cp->fake = obj->fake;
-+ cp->rename_allowed = obj->rename_allowed;
-+ cp->unlink_allowed = obj->unlink_allowed;
-+ cp->serial = obj->serial;
-+ cp->n_data_chunks = obj->n_data_chunks;
-+
-+ if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE)
-+ cp->size_or_equiv_obj = obj->variant.file_variant.file_size;
-+ else if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK)
-+ cp->size_or_equiv_obj = obj->variant.hardlink_variant.equiv_id;
-+}
-+
-+static int yaffs2_checkpt_obj_to_obj(struct yaffs_obj *obj,
-+ struct yaffs_checkpt_obj *cp)
-+{
-+ struct yaffs_obj *parent;
-+
-+ if (obj->variant_type != cp->variant_type) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "Checkpoint read object %d type %d chunk %d does not match existing object type %d",
-+ cp->obj_id, cp->variant_type, cp->hdr_chunk,
-+ obj->variant_type);
-+ return 0;
-+ }
-+
-+ obj->obj_id = cp->obj_id;
-+
-+ if (cp->parent_id)
-+ parent = yaffs_find_or_create_by_number(obj->my_dev,
-+ cp->parent_id,
-+ YAFFS_OBJECT_TYPE_DIRECTORY);
-+ else
-+ parent = NULL;
-+
-+ if (parent) {
-+ if (parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "Checkpoint read object %d parent %d type %d chunk %d Parent type, %d, not directory",
-+ cp->obj_id, cp->parent_id,
-+ cp->variant_type, cp->hdr_chunk,
-+ parent->variant_type);
-+ return 0;
-+ }
-+ yaffs_add_obj_to_dir(parent, obj);
-+ }
-+
-+ obj->hdr_chunk = cp->hdr_chunk;
-+ obj->variant_type = cp->variant_type;
-+ obj->deleted = cp->deleted;
-+ obj->soft_del = cp->soft_del;
-+ obj->unlinked = cp->unlinked;
-+ obj->fake = cp->fake;
-+ obj->rename_allowed = cp->rename_allowed;
-+ obj->unlink_allowed = cp->unlink_allowed;
-+ obj->serial = cp->serial;
-+ obj->n_data_chunks = cp->n_data_chunks;
-+
-+ if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE)
-+ obj->variant.file_variant.file_size = cp->size_or_equiv_obj;
-+ else if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK)
-+ obj->variant.hardlink_variant.equiv_id = cp->size_or_equiv_obj;
-+
-+ if (obj->hdr_chunk > 0)
-+ obj->lazy_loaded = 1;
-+ return 1;
-+}
-+
-+static int yaffs2_checkpt_tnode_worker(struct yaffs_obj *in,
-+ struct yaffs_tnode *tn, u32 level,
-+ int chunk_offset)
-+{
-+ int i;
-+ struct yaffs_dev *dev = in->my_dev;
-+ int ok = 1;
-+ u32 base_offset;
-+
-+ if (!tn)
-+ return 1;
-+
-+ if (level > 0) {
-+ for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
-+ if (!tn->internal[i])
-+ continue;
-+ ok = yaffs2_checkpt_tnode_worker(in,
-+ tn->internal[i],
-+ level - 1,
-+ (chunk_offset <<
-+ YAFFS_TNODES_INTERNAL_BITS) + i);
-+ }
-+ return ok;
-+ }
-+
-+ /* Level 0 tnode */
-+ base_offset = chunk_offset << YAFFS_TNODES_LEVEL0_BITS;
-+ ok = (yaffs2_checkpt_wr(dev, &base_offset, sizeof(base_offset)) ==
-+ sizeof(base_offset));
-+ if (ok)
-+ ok = (yaffs2_checkpt_wr(dev, tn, dev->tnode_size) ==
-+ dev->tnode_size);
-+
-+ return ok;
-+}
-+
-+static int yaffs2_wr_checkpt_tnodes(struct yaffs_obj *obj)
-+{
-+ u32 end_marker = ~0;
-+ int ok = 1;
-+
-+ if (obj->variant_type != YAFFS_OBJECT_TYPE_FILE)
-+ return ok;
-+
-+ ok = yaffs2_checkpt_tnode_worker(obj,
-+ obj->variant.file_variant.top,
-+ obj->variant.file_variant.
-+ top_level, 0);
-+ if (ok)
-+ ok = (yaffs2_checkpt_wr(obj->my_dev, &end_marker,
-+ sizeof(end_marker)) == sizeof(end_marker));
-+
-+ return ok ? 1 : 0;
-+}
-+
-+static int yaffs2_rd_checkpt_tnodes(struct yaffs_obj *obj)
-+{
-+ u32 base_chunk;
-+ int ok = 1;
-+ struct yaffs_dev *dev = obj->my_dev;
-+ struct yaffs_file_var *file_stuct_ptr = &obj->variant.file_variant;
-+ struct yaffs_tnode *tn;
-+ int nread = 0;
-+
-+ ok = (yaffs2_checkpt_rd(dev, &base_chunk, sizeof(base_chunk)) ==
-+ sizeof(base_chunk));
-+
-+ while (ok && (~base_chunk)) {
-+ nread++;
-+ /* Read level 0 tnode */
-+
-+ tn = yaffs_get_tnode(dev);
-+ if (tn)
-+ ok = (yaffs2_checkpt_rd(dev, tn, dev->tnode_size) ==
-+ dev->tnode_size);
-+ else
-+ ok = 0;
-+
-+ if (tn && ok)
-+ ok = yaffs_add_find_tnode_0(dev,
-+ file_stuct_ptr,
-+ base_chunk, tn) ? 1 : 0;
-+
-+ if (ok)
-+ ok = (yaffs2_checkpt_rd
-+ (dev, &base_chunk,
-+ sizeof(base_chunk)) == sizeof(base_chunk));
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "Checkpoint read tnodes %d records, last %d. ok %d",
-+ nread, base_chunk, ok);
-+
-+ return ok ? 1 : 0;
-+}
-+
-+static int yaffs2_wr_checkpt_objs(struct yaffs_dev *dev)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_checkpt_obj cp;
-+ int i;
-+ int ok = 1;
-+ struct list_head *lh;
-+
-+ /* Iterate through the objects in each hash entry,
-+ * dumping them to the checkpointing stream.
-+ */
-+
-+ for (i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++) {
-+ list_for_each(lh, &dev->obj_bucket[i].list) {
-+ obj = list_entry(lh, struct yaffs_obj, hash_link);
-+ if (!obj->defered_free) {
-+ yaffs2_obj_checkpt_obj(&cp, obj);
-+ cp.struct_type = sizeof(cp);
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "Checkpoint write object %d parent %d type %d chunk %d obj addr %p",
-+ cp.obj_id, cp.parent_id,
-+ cp.variant_type, cp.hdr_chunk, obj);
-+
-+ ok = (yaffs2_checkpt_wr(dev, &cp,
-+ sizeof(cp)) == sizeof(cp));
-+
-+ if (ok &&
-+ obj->variant_type ==
-+ YAFFS_OBJECT_TYPE_FILE)
-+ ok = yaffs2_wr_checkpt_tnodes(obj);
-+ }
-+ }
-+ }
-+
-+ /* Dump end of list */
-+ memset(&cp, 0xff, sizeof(struct yaffs_checkpt_obj));
-+ cp.struct_type = sizeof(cp);
-+
-+ if (ok)
-+ ok = (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp));
-+
-+ return ok ? 1 : 0;
-+}
-+
-+static int yaffs2_rd_checkpt_objs(struct yaffs_dev *dev)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_checkpt_obj cp;
-+ int ok = 1;
-+ int done = 0;
-+ LIST_HEAD(hard_list);
-+
-+
-+ while (ok && !done) {
-+ ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp));
-+ if (cp.struct_type != sizeof(cp)) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "struct size %d instead of %d ok %d",
-+ cp.struct_type, (int)sizeof(cp), ok);
-+ ok = 0;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "Checkpoint read object %d parent %d type %d chunk %d ",
-+ cp.obj_id, cp.parent_id, cp.variant_type,
-+ cp.hdr_chunk);
-+
-+ if (ok && cp.obj_id == ~0) {
-+ done = 1;
-+ } else if (ok) {
-+ obj =
-+ yaffs_find_or_create_by_number(dev, cp.obj_id,
-+ cp.variant_type);
-+ if (obj) {
-+ ok = yaffs2_checkpt_obj_to_obj(obj, &cp);
-+ if (!ok)
-+ break;
-+ if (obj->variant_type ==
-+ YAFFS_OBJECT_TYPE_FILE) {
-+ ok = yaffs2_rd_checkpt_tnodes(obj);
-+ } else if (obj->variant_type ==
-+ YAFFS_OBJECT_TYPE_HARDLINK) {
-+ list_add(&obj->hard_links, &hard_list);
-+ }
-+ } else {
-+ ok = 0;
-+ }
-+ }
-+ }
-+
-+ if (ok)
-+ yaffs_link_fixup(dev, &hard_list);
-+
-+ return ok ? 1 : 0;
-+}
-+
-+static int yaffs2_wr_checkpt_sum(struct yaffs_dev *dev)
-+{
-+ u32 checkpt_sum;
-+ int ok;
-+
-+ yaffs2_get_checkpt_sum(dev, &checkpt_sum);
-+
-+ ok = (yaffs2_checkpt_wr(dev, &checkpt_sum, sizeof(checkpt_sum)) ==
-+ sizeof(checkpt_sum));
-+
-+ if (!ok)
-+ return 0;
-+
-+ return 1;
-+}
-+
-+static int yaffs2_rd_checkpt_sum(struct yaffs_dev *dev)
-+{
-+ u32 checkpt_sum0;
-+ u32 checkpt_sum1;
-+ int ok;
-+
-+ yaffs2_get_checkpt_sum(dev, &checkpt_sum0);
-+
-+ ok = (yaffs2_checkpt_rd(dev, &checkpt_sum1, sizeof(checkpt_sum1)) ==
-+ sizeof(checkpt_sum1));
-+
-+ if (!ok)
-+ return 0;
-+
-+ if (checkpt_sum0 != checkpt_sum1)
-+ return 0;
-+
-+ return 1;
-+}
-+
-+static int yaffs2_wr_checkpt_data(struct yaffs_dev *dev)
-+{
-+ int ok = 1;
-+
-+ if (!yaffs2_checkpt_required(dev)) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "skipping checkpoint write");
-+ ok = 0;
-+ }
-+
-+ if (ok)
-+ ok = yaffs2_checkpt_open(dev, 1);
-+
-+ if (ok) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "write checkpoint validity");
-+ ok = yaffs2_wr_checkpt_validity_marker(dev, 1);
-+ }
-+ if (ok) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "write checkpoint device");
-+ ok = yaffs2_wr_checkpt_dev(dev);
-+ }
-+ if (ok) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "write checkpoint objects");
-+ ok = yaffs2_wr_checkpt_objs(dev);
-+ }
-+ if (ok) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "write checkpoint validity");
-+ ok = yaffs2_wr_checkpt_validity_marker(dev, 0);
-+ }
-+
-+ if (ok)
-+ ok = yaffs2_wr_checkpt_sum(dev);
-+
-+ if (!yaffs_checkpt_close(dev))
-+ ok = 0;
-+
-+ if (ok)
-+ dev->is_checkpointed = 1;
-+ else
-+ dev->is_checkpointed = 0;
-+
-+ return dev->is_checkpointed;
-+}
-+
-+static int yaffs2_rd_checkpt_data(struct yaffs_dev *dev)
-+{
-+ int ok = 1;
-+
-+ if (!dev->param.is_yaffs2)
-+ ok = 0;
-+
-+ if (ok && dev->param.skip_checkpt_rd) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "skipping checkpoint read");
-+ ok = 0;
-+ }
-+
-+ if (ok)
-+ ok = yaffs2_checkpt_open(dev, 0); /* open for read */
-+
-+ if (ok) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "read checkpoint validity");
-+ ok = yaffs2_rd_checkpt_validity_marker(dev, 1);
-+ }
-+ if (ok) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "read checkpoint device");
-+ ok = yaffs2_rd_checkpt_dev(dev);
-+ }
-+ if (ok) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "read checkpoint objects");
-+ ok = yaffs2_rd_checkpt_objs(dev);
-+ }
-+ if (ok) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "read checkpoint validity");
-+ ok = yaffs2_rd_checkpt_validity_marker(dev, 0);
-+ }
-+
-+ if (ok) {
-+ ok = yaffs2_rd_checkpt_sum(dev);
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "read checkpoint checksum %d", ok);
-+ }
-+
-+ if (!yaffs_checkpt_close(dev))
-+ ok = 0;
-+
-+ if (ok)
-+ dev->is_checkpointed = 1;
-+ else
-+ dev->is_checkpointed = 0;
-+
-+ return ok ? 1 : 0;
-+}
-+
-+void yaffs2_checkpt_invalidate(struct yaffs_dev *dev)
-+{
-+ if (dev->is_checkpointed || dev->blocks_in_checkpt > 0) {
-+ dev->is_checkpointed = 0;
-+ yaffs2_checkpt_invalidate_stream(dev);
-+ }
-+ if (dev->param.sb_dirty_fn)
-+ dev->param.sb_dirty_fn(dev);
-+}
-+
-+int yaffs_checkpoint_save(struct yaffs_dev *dev)
-+{
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "save entry: is_checkpointed %d",
-+ dev->is_checkpointed);
-+
-+ yaffs_verify_objects(dev);
-+ yaffs_verify_blocks(dev);
-+ yaffs_verify_free_chunks(dev);
-+
-+ if (!dev->is_checkpointed) {
-+ yaffs2_checkpt_invalidate(dev);
-+ yaffs2_wr_checkpt_data(dev);
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT | YAFFS_TRACE_MOUNT,
-+ "save exit: is_checkpointed %d",
-+ dev->is_checkpointed);
-+
-+ return dev->is_checkpointed;
-+}
-+
-+int yaffs2_checkpt_restore(struct yaffs_dev *dev)
-+{
-+ int retval;
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "restore entry: is_checkpointed %d",
-+ dev->is_checkpointed);
-+
-+ retval = yaffs2_rd_checkpt_data(dev);
-+
-+ if (dev->is_checkpointed) {
-+ yaffs_verify_objects(dev);
-+ yaffs_verify_blocks(dev);
-+ yaffs_verify_free_chunks(dev);
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "restore exit: is_checkpointed %d",
-+ dev->is_checkpointed);
-+
-+ return retval;
-+}
-+
-+int yaffs2_handle_hole(struct yaffs_obj *obj, loff_t new_size)
-+{
-+ /* if new_size > old_file_size.
-+ * We're going to be writing a hole.
-+ * If the hole is small then write zeros otherwise write a start
-+ * of hole marker.
-+ */
-+ loff_t old_file_size;
-+ loff_t increase;
-+ int small_hole;
-+ int result = YAFFS_OK;
-+ struct yaffs_dev *dev = NULL;
-+ u8 *local_buffer = NULL;
-+ int small_increase_ok = 0;
-+
-+ if (!obj)
-+ return YAFFS_FAIL;
-+
-+ if (obj->variant_type != YAFFS_OBJECT_TYPE_FILE)
-+ return YAFFS_FAIL;
-+
-+ dev = obj->my_dev;
-+
-+ /* Bail out if not yaffs2 mode */
-+ if (!dev->param.is_yaffs2)
-+ return YAFFS_OK;
-+
-+ old_file_size = obj->variant.file_variant.file_size;
-+
-+ if (new_size <= old_file_size)
-+ return YAFFS_OK;
-+
-+ increase = new_size - old_file_size;
-+
-+ if (increase < YAFFS_SMALL_HOLE_THRESHOLD * dev->data_bytes_per_chunk &&
-+ yaffs_check_alloc_available(dev, YAFFS_SMALL_HOLE_THRESHOLD + 1))
-+ small_hole = 1;
-+ else
-+ small_hole = 0;
-+
-+ if (small_hole)
-+ local_buffer = yaffs_get_temp_buffer(dev);
-+
-+ if (local_buffer) {
-+ /* fill hole with zero bytes */
-+ loff_t pos = old_file_size;
-+ int this_write;
-+ int written;
-+ memset(local_buffer, 0, dev->data_bytes_per_chunk);
-+ small_increase_ok = 1;
-+
-+ while (increase > 0 && small_increase_ok) {
-+ this_write = increase;
-+ if (this_write > dev->data_bytes_per_chunk)
-+ this_write = dev->data_bytes_per_chunk;
-+ written =
-+ yaffs_do_file_wr(obj, local_buffer, pos, this_write,
-+ 0);
-+ if (written == this_write) {
-+ pos += this_write;
-+ increase -= this_write;
-+ } else {
-+ small_increase_ok = 0;
-+ }
-+ }
-+
-+ yaffs_release_temp_buffer(dev, local_buffer);
-+
-+ /* If out of space then reverse any chunks we've added */
-+ if (!small_increase_ok)
-+ yaffs_resize_file_down(obj, old_file_size);
-+ }
-+
-+ if (!small_increase_ok &&
-+ obj->parent &&
-+ obj->parent->obj_id != YAFFS_OBJECTID_UNLINKED &&
-+ obj->parent->obj_id != YAFFS_OBJECTID_DELETED) {
-+ /* Write a hole start header with the old file size */
-+ yaffs_update_oh(obj, NULL, 0, 1, 0, NULL);
-+ }
-+
-+ return result;
-+}
-+
-+struct yaffs_block_index {
-+ int seq;
-+ int block;
-+};
-+
-+static int yaffs2_ybicmp(const void *a, const void *b)
-+{
-+ int aseq = ((struct yaffs_block_index *)a)->seq;
-+ int bseq = ((struct yaffs_block_index *)b)->seq;
-+ int ablock = ((struct yaffs_block_index *)a)->block;
-+ int bblock = ((struct yaffs_block_index *)b)->block;
-+
-+ if (aseq == bseq)
-+ return ablock - bblock;
-+
-+ return aseq - bseq;
-+}
-+
-+static inline int yaffs2_scan_chunk(struct yaffs_dev *dev,
-+ struct yaffs_block_info *bi,
-+ int blk, int chunk_in_block,
-+ int *found_chunks,
-+ u8 *chunk_data,
-+ struct list_head *hard_list,
-+ int summary_available)
-+{
-+ struct yaffs_obj_hdr *oh;
-+ struct yaffs_obj *in;
-+ struct yaffs_obj *parent;
-+ int equiv_id;
-+ loff_t file_size;
-+ int is_shrink;
-+ int is_unlinked;
-+ struct yaffs_ext_tags tags;
-+ int result;
-+ int alloc_failed = 0;
-+ int chunk = blk * dev->param.chunks_per_block + chunk_in_block;
-+ struct yaffs_file_var *file_var;
-+ struct yaffs_hardlink_var *hl_var;
-+ struct yaffs_symlink_var *sl_var;
-+
-+ if (summary_available) {
-+ result = yaffs_summary_fetch(dev, &tags, chunk_in_block);
-+ tags.seq_number = bi->seq_number;
-+ }
-+
-+ if (!summary_available || tags.obj_id == 0) {
-+ result = yaffs_rd_chunk_tags_nand(dev, chunk, NULL, &tags);
-+ dev->tags_used++;
-+ } else {
-+ dev->summary_used++;
-+ }
-+
-+ /* Let's have a good look at this chunk... */
-+
-+ if (!tags.chunk_used) {
-+ /* An unassigned chunk in the block.
-+ * If there are used chunks after this one, then
-+ * it is a chunk that was skipped due to failing
-+ * the erased check. Just skip it so that it can
-+ * be deleted.
-+ * But, more typically, We get here when this is
-+ * an unallocated chunk and his means that
-+ * either the block is empty or this is the one
-+ * being allocated from
-+ */
-+
-+ if (*found_chunks) {
-+ /* This is a chunk that was skipped due
-+ * to failing the erased check */
-+ } else if (chunk_in_block == 0) {
-+ /* We're looking at the first chunk in
-+ * the block so the block is unused */
-+ bi->block_state = YAFFS_BLOCK_STATE_EMPTY;
-+ dev->n_erased_blocks++;
-+ } else {
-+ if (bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCAN ||
-+ bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING) {
-+ if (dev->seq_number == bi->seq_number) {
-+ /* Allocating from this block*/
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ " Allocating from %d %d",
-+ blk, chunk_in_block);
-+
-+ bi->block_state =
-+ YAFFS_BLOCK_STATE_ALLOCATING;
-+ dev->alloc_block = blk;
-+ dev->alloc_page = chunk_in_block;
-+ dev->alloc_block_finder = blk;
-+ } else {
-+ /* This is a partially written block
-+ * that is not the current
-+ * allocation block.
-+ */
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ "Partially written block %d detected. gc will fix this.",
-+ blk);
-+ }
-+ }
-+ }
-+
-+ dev->n_free_chunks++;
-+
-+ } else if (tags.ecc_result ==
-+ YAFFS_ECC_RESULT_UNFIXED) {
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ " Unfixed ECC in chunk(%d:%d), chunk ignored",
-+ blk, chunk_in_block);
-+ dev->n_free_chunks++;
-+ } else if (tags.obj_id > YAFFS_MAX_OBJECT_ID ||
-+ tags.chunk_id > YAFFS_MAX_CHUNK_ID ||
-+ tags.obj_id == YAFFS_OBJECTID_SUMMARY ||
-+ (tags.chunk_id > 0 &&
-+ tags.n_bytes > dev->data_bytes_per_chunk) ||
-+ tags.seq_number != bi->seq_number) {
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ "Chunk (%d:%d) with bad tags:obj = %d, chunk_id = %d, n_bytes = %d, ignored",
-+ blk, chunk_in_block, tags.obj_id,
-+ tags.chunk_id, tags.n_bytes);
-+ dev->n_free_chunks++;
-+ } else if (tags.chunk_id > 0) {
-+ /* chunk_id > 0 so it is a data chunk... */
-+ loff_t endpos;
-+ loff_t chunk_base = (tags.chunk_id - 1) *
-+ dev->data_bytes_per_chunk;
-+
-+ *found_chunks = 1;
-+
-+ yaffs_set_chunk_bit(dev, blk, chunk_in_block);
-+ bi->pages_in_use++;
-+
-+ in = yaffs_find_or_create_by_number(dev,
-+ tags.obj_id,
-+ YAFFS_OBJECT_TYPE_FILE);
-+ if (!in)
-+ /* Out of memory */
-+ alloc_failed = 1;
-+
-+ if (in &&
-+ in->variant_type == YAFFS_OBJECT_TYPE_FILE &&
-+ chunk_base < in->variant.file_variant.shrink_size) {
-+ /* This has not been invalidated by
-+ * a resize */
-+ if (!yaffs_put_chunk_in_file(in, tags.chunk_id,
-+ chunk, -1))
-+ alloc_failed = 1;
-+
-+ /* File size is calculated by looking at
-+ * the data chunks if we have not
-+ * seen an object header yet.
-+ * Stop this practice once we find an
-+ * object header.
-+ */
-+ endpos = chunk_base + tags.n_bytes;
-+
-+ if (!in->valid &&
-+ in->variant.file_variant.scanned_size < endpos) {
-+ in->variant.file_variant.
-+ scanned_size = endpos;
-+ in->variant.file_variant.
-+ file_size = endpos;
-+ }
-+ } else if (in) {
-+ /* This chunk has been invalidated by a
-+ * resize, or a past file deletion
-+ * so delete the chunk*/
-+ yaffs_chunk_del(dev, chunk, 1, __LINE__);
-+ }
-+ } else {
-+ /* chunk_id == 0, so it is an ObjectHeader.
-+ * Thus, we read in the object header and make
-+ * the object
-+ */
-+ *found_chunks = 1;
-+
-+ yaffs_set_chunk_bit(dev, blk, chunk_in_block);
-+ bi->pages_in_use++;
-+
-+ oh = NULL;
-+ in = NULL;
-+
-+ if (tags.extra_available) {
-+ in = yaffs_find_or_create_by_number(dev,
-+ tags.obj_id,
-+ tags.extra_obj_type);
-+ if (!in)
-+ alloc_failed = 1;
-+ }
-+
-+ if (!in ||
-+ (!in->valid && dev->param.disable_lazy_load) ||
-+ tags.extra_shadows ||
-+ (!in->valid && (tags.obj_id == YAFFS_OBJECTID_ROOT ||
-+ tags.obj_id == YAFFS_OBJECTID_LOSTNFOUND))) {
-+
-+ /* If we don't have valid info then we
-+ * need to read the chunk
-+ * TODO In future we can probably defer
-+ * reading the chunk and living with
-+ * invalid data until needed.
-+ */
-+
-+ result = yaffs_rd_chunk_tags_nand(dev,
-+ chunk,
-+ chunk_data,
-+ NULL);
-+
-+ oh = (struct yaffs_obj_hdr *)chunk_data;
-+
-+ if (dev->param.inband_tags) {
-+ /* Fix up the header if they got
-+ * corrupted by inband tags */
-+ oh->shadows_obj =
-+ oh->inband_shadowed_obj_id;
-+ oh->is_shrink =
-+ oh->inband_is_shrink;
-+ }
-+
-+ if (!in) {
-+ in = yaffs_find_or_create_by_number(dev,
-+ tags.obj_id, oh->type);
-+ if (!in)
-+ alloc_failed = 1;
-+ }
-+ }
-+
-+ if (!in) {
-+ /* TODO Hoosterman we have a problem! */
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs tragedy: Could not make object for object %d at chunk %d during scan",
-+ tags.obj_id, chunk);
-+ return YAFFS_FAIL;
-+ }
-+
-+ if (in->valid) {
-+ /* We have already filled this one.
-+ * We have a duplicate that will be
-+ * discarded, but we first have to suck
-+ * out resize info if it is a file.
-+ */
-+ if ((in->variant_type == YAFFS_OBJECT_TYPE_FILE) &&
-+ ((oh && oh->type == YAFFS_OBJECT_TYPE_FILE) ||
-+ (tags.extra_available &&
-+ tags.extra_obj_type == YAFFS_OBJECT_TYPE_FILE)
-+ )) {
-+ loff_t this_size = (oh) ?
-+ yaffs_oh_to_size(oh) :
-+ tags.extra_file_size;
-+ u32 parent_obj_id = (oh) ?
-+ oh->parent_obj_id :
-+ tags.extra_parent_id;
-+
-+ is_shrink = (oh) ?
-+ oh->is_shrink :
-+ tags.extra_is_shrink;
-+
-+ /* If it is deleted (unlinked
-+ * at start also means deleted)
-+ * we treat the file size as
-+ * being zeroed at this point.
-+ */
-+ if (parent_obj_id == YAFFS_OBJECTID_DELETED ||
-+ parent_obj_id == YAFFS_OBJECTID_UNLINKED) {
-+ this_size = 0;
-+ is_shrink = 1;
-+ }
-+
-+ if (is_shrink &&
-+ in->variant.file_variant.shrink_size >
-+ this_size)
-+ in->variant.file_variant.shrink_size =
-+ this_size;
-+
-+ if (is_shrink)
-+ bi->has_shrink_hdr = 1;
-+ }
-+ /* Use existing - destroy this one. */
-+ yaffs_chunk_del(dev, chunk, 1, __LINE__);
-+ }
-+
-+ if (!in->valid && in->variant_type !=
-+ (oh ? oh->type : tags.extra_obj_type)) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs tragedy: Bad type, %d != %d, for object %d at chunk %d during scan",
-+ oh ? oh->type : tags.extra_obj_type,
-+ in->variant_type, tags.obj_id,
-+ chunk);
-+ in = yaffs_retype_obj(in, oh ? oh->type : tags.extra_obj_type);
-+ }
-+
-+ if (!in->valid &&
-+ (tags.obj_id == YAFFS_OBJECTID_ROOT ||
-+ tags.obj_id == YAFFS_OBJECTID_LOSTNFOUND)) {
-+ /* We only load some info, don't fiddle
-+ * with directory structure */
-+ in->valid = 1;
-+
-+ if (oh) {
-+ in->yst_mode = oh->yst_mode;
-+ yaffs_load_attribs(in, oh);
-+ in->lazy_loaded = 0;
-+ } else {
-+ in->lazy_loaded = 1;
-+ }
-+ in->hdr_chunk = chunk;
-+
-+ } else if (!in->valid) {
-+ /* we need to load this info */
-+ in->valid = 1;
-+ in->hdr_chunk = chunk;
-+ if (oh) {
-+ in->variant_type = oh->type;
-+ in->yst_mode = oh->yst_mode;
-+ yaffs_load_attribs(in, oh);
-+
-+ if (oh->shadows_obj > 0)
-+ yaffs_handle_shadowed_obj(dev,
-+ oh->shadows_obj, 1);
-+
-+ yaffs_set_obj_name_from_oh(in, oh);
-+ parent = yaffs_find_or_create_by_number(dev,
-+ oh->parent_obj_id,
-+ YAFFS_OBJECT_TYPE_DIRECTORY);
-+ file_size = yaffs_oh_to_size(oh);
-+ is_shrink = oh->is_shrink;
-+ equiv_id = oh->equiv_id;
-+ } else {
-+ in->variant_type = tags.extra_obj_type;
-+ parent = yaffs_find_or_create_by_number(dev,
-+ tags.extra_parent_id,
-+ YAFFS_OBJECT_TYPE_DIRECTORY);
-+ file_size = tags.extra_file_size;
-+ is_shrink = tags.extra_is_shrink;
-+ equiv_id = tags.extra_equiv_id;
-+ in->lazy_loaded = 1;
-+ }
-+ in->dirty = 0;
-+
-+ if (!parent)
-+ alloc_failed = 1;
-+
-+ /* directory stuff...
-+ * hook up to parent
-+ */
-+
-+ if (parent &&
-+ parent->variant_type == YAFFS_OBJECT_TYPE_UNKNOWN) {
-+ /* Set up as a directory */
-+ parent->variant_type =
-+ YAFFS_OBJECT_TYPE_DIRECTORY;
-+ INIT_LIST_HEAD(&parent->
-+ variant.dir_variant.children);
-+ } else if (!parent ||
-+ parent->variant_type !=
-+ YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ /* Hoosterman, another problem....
-+ * Trying to use a non-directory as a directory
-+ */
-+
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
-+ );
-+ parent = dev->lost_n_found;
-+ }
-+ yaffs_add_obj_to_dir(parent, in);
-+
-+ is_unlinked = (parent == dev->del_dir) ||
-+ (parent == dev->unlinked_dir);
-+
-+ if (is_shrink)
-+ /* Mark the block */
-+ bi->has_shrink_hdr = 1;
-+
-+ /* Note re hardlinks.
-+ * Since we might scan a hardlink before its equivalent
-+ * object is scanned we put them all in a list.
-+ * After scanning is complete, we should have all the
-+ * objects, so we run through this list and fix up all
-+ * the chains.
-+ */
-+
-+ switch (in->variant_type) {
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ /* Todo got a problem */
-+ break;
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ file_var = &in->variant.file_variant;
-+ if (file_var->scanned_size < file_size) {
-+ /* This covers the case where the file
-+ * size is greater than the data held.
-+ * This will happen if the file is
-+ * resized to be larger than its
-+ * current data extents.
-+ */
-+ file_var->file_size = file_size;
-+ file_var->scanned_size = file_size;
-+ }
-+
-+ if (file_var->shrink_size > file_size)
-+ file_var->shrink_size = file_size;
-+
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ hl_var = &in->variant.hardlink_variant;
-+ if (!is_unlinked) {
-+ hl_var->equiv_id = equiv_id;
-+ list_add(&in->hard_links, hard_list);
-+ }
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ /* Do nothing */
-+ break;
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ /* Do nothing */
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ sl_var = &in->variant.symlink_variant;
-+ if (oh) {
-+ sl_var->alias =
-+ yaffs_clone_str(oh->alias);
-+ if (!sl_var->alias)
-+ alloc_failed = 1;
-+ }
-+ break;
-+ }
-+ }
-+ }
-+ return alloc_failed ? YAFFS_FAIL : YAFFS_OK;
-+}
-+
-+int yaffs2_scan_backwards(struct yaffs_dev *dev)
-+{
-+ int blk;
-+ int block_iter;
-+ int start_iter;
-+ int end_iter;
-+ int n_to_scan = 0;
-+ enum yaffs_block_state state;
-+ int c;
-+ LIST_HEAD(hard_list);
-+ struct yaffs_block_info *bi;
-+ u32 seq_number;
-+ int n_blocks = dev->internal_end_block - dev->internal_start_block + 1;
-+ u8 *chunk_data;
-+ int found_chunks;
-+ int alloc_failed = 0;
-+ struct yaffs_block_index *block_index = NULL;
-+ int alt_block_index = 0;
-+ int summary_available;
-+
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ "yaffs2_scan_backwards starts intstartblk %d intendblk %d...",
-+ dev->internal_start_block, dev->internal_end_block);
-+
-+ dev->seq_number = YAFFS_LOWEST_SEQUENCE_NUMBER;
-+
-+ block_index =
-+ kmalloc(n_blocks * sizeof(struct yaffs_block_index), GFP_NOFS);
-+
-+ if (!block_index) {
-+ block_index =
-+ vmalloc(n_blocks * sizeof(struct yaffs_block_index));
-+ alt_block_index = 1;
-+ }
-+
-+ if (!block_index) {
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ "yaffs2_scan_backwards() could not allocate block index!"
-+ );
-+ return YAFFS_FAIL;
-+ }
-+
-+ dev->blocks_in_checkpt = 0;
-+
-+ chunk_data = yaffs_get_temp_buffer(dev);
-+
-+ /* Scan all the blocks to determine their state */
-+ bi = dev->block_info;
-+ for (blk = dev->internal_start_block; blk <= dev->internal_end_block;
-+ blk++) {
-+ yaffs_clear_chunk_bits(dev, blk);
-+ bi->pages_in_use = 0;
-+ bi->soft_del_pages = 0;
-+
-+ yaffs_query_init_block_state(dev, blk, &state, &seq_number);
-+
-+ bi->block_state = state;
-+ bi->seq_number = seq_number;
-+
-+ if (bi->seq_number == YAFFS_SEQUENCE_CHECKPOINT_DATA)
-+ bi->block_state = YAFFS_BLOCK_STATE_CHECKPOINT;
-+ if (bi->seq_number == YAFFS_SEQUENCE_BAD_BLOCK)
-+ bi->block_state = YAFFS_BLOCK_STATE_DEAD;
-+
-+ yaffs_trace(YAFFS_TRACE_SCAN_DEBUG,
-+ "Block scanning block %d state %d seq %d",
-+ blk, bi->block_state, seq_number);
-+
-+ if (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT) {
-+ dev->blocks_in_checkpt++;
-+
-+ } else if (bi->block_state == YAFFS_BLOCK_STATE_DEAD) {
-+ yaffs_trace(YAFFS_TRACE_BAD_BLOCKS,
-+ "block %d is bad", blk);
-+ } else if (bi->block_state == YAFFS_BLOCK_STATE_EMPTY) {
-+ yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, "Block empty ");
-+ dev->n_erased_blocks++;
-+ dev->n_free_chunks += dev->param.chunks_per_block;
-+ } else if (bi->block_state ==
-+ YAFFS_BLOCK_STATE_NEEDS_SCAN) {
-+ /* Determine the highest sequence number */
-+ if (seq_number >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
-+ seq_number < YAFFS_HIGHEST_SEQUENCE_NUMBER) {
-+ block_index[n_to_scan].seq = seq_number;
-+ block_index[n_to_scan].block = blk;
-+ n_to_scan++;
-+ if (seq_number >= dev->seq_number)
-+ dev->seq_number = seq_number;
-+ } else {
-+ /* TODO: Nasty sequence number! */
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ "Block scanning block %d has bad sequence number %d",
-+ blk, seq_number);
-+ }
-+ }
-+ bi++;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "%d blocks to be sorted...", n_to_scan);
-+
-+ cond_resched();
-+
-+ /* Sort the blocks by sequence number */
-+ sort(block_index, n_to_scan, sizeof(struct yaffs_block_index),
-+ yaffs2_ybicmp, NULL);
-+
-+ cond_resched();
-+
-+ yaffs_trace(YAFFS_TRACE_SCAN, "...done");
-+
-+ /* Now scan the blocks looking at the data. */
-+ start_iter = 0;
-+ end_iter = n_to_scan - 1;
-+ yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, "%d blocks to scan", n_to_scan);
-+
-+ /* For each block.... backwards */
-+ for (block_iter = end_iter;
-+ !alloc_failed && block_iter >= start_iter;
-+ block_iter--) {
-+ /* Cooperative multitasking! This loop can run for so
-+ long that watchdog timers expire. */
-+ cond_resched();
-+
-+ /* get the block to scan in the correct order */
-+ blk = block_index[block_iter].block;
-+ bi = yaffs_get_block_info(dev, blk);
-+
-+ summary_available = yaffs_summary_read(dev, dev->sum_tags, blk);
-+
-+ /* For each chunk in each block that needs scanning.... */
-+ found_chunks = 0;
-+ if (summary_available)
-+ c = dev->chunks_per_summary - 1;
-+ else
-+ c = dev->param.chunks_per_block - 1;
-+
-+ for (/* c is already initialised */;
-+ !alloc_failed && c >= 0 &&
-+ (bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCAN ||
-+ bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING);
-+ c--) {
-+ /* Scan backwards...
-+ * Read the tags and decide what to do
-+ */
-+ if (yaffs2_scan_chunk(dev, bi, blk, c,
-+ &found_chunks, chunk_data,
-+ &hard_list, summary_available) ==
-+ YAFFS_FAIL)
-+ alloc_failed = 1;
-+ }
-+
-+ if (bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCAN) {
-+ /* If we got this far while scanning, then the block
-+ * is fully allocated. */
-+ bi->block_state = YAFFS_BLOCK_STATE_FULL;
-+ }
-+
-+ /* Now let's see if it was dirty */
-+ if (bi->pages_in_use == 0 &&
-+ !bi->has_shrink_hdr &&
-+ bi->block_state == YAFFS_BLOCK_STATE_FULL) {
-+ yaffs_block_became_dirty(dev, blk);
-+ }
-+ }
-+
-+ yaffs_skip_rest_of_block(dev);
-+
-+ if (alt_block_index)
-+ vfree(block_index);
-+ else
-+ kfree(block_index);
-+
-+ /* Ok, we've done all the scanning.
-+ * Fix up the hard link chains.
-+ * We have scanned all the objects, now it's time to add these
-+ * hardlinks.
-+ */
-+ yaffs_link_fixup(dev, &hard_list);
-+
-+ yaffs_release_temp_buffer(dev, chunk_data);
-+
-+ if (alloc_failed)
-+ return YAFFS_FAIL;
-+
-+ yaffs_trace(YAFFS_TRACE_SCAN, "yaffs2_scan_backwards ends");
-+
-+ return YAFFS_OK;
-+}
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yaffs_yaffs2.h linux-3.18.14/fs/yaffs2/yaffs_yaffs2.h
---- linux-3.18.14.orig/fs/yaffs2/yaffs_yaffs2.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yaffs_yaffs2.h 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,39 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_YAFFS2_H__
-+#define __YAFFS_YAFFS2_H__
-+
-+#include "yaffs_guts.h"
-+
-+void yaffs_calc_oldest_dirty_seq(struct yaffs_dev *dev);
-+void yaffs2_find_oldest_dirty_seq(struct yaffs_dev *dev);
-+void yaffs2_clear_oldest_dirty_seq(struct yaffs_dev *dev,
-+ struct yaffs_block_info *bi);
-+void yaffs2_update_oldest_dirty_seq(struct yaffs_dev *dev, unsigned block_no,
-+ struct yaffs_block_info *bi);
-+int yaffs_block_ok_for_gc(struct yaffs_dev *dev, struct yaffs_block_info *bi);
-+u32 yaffs2_find_refresh_block(struct yaffs_dev *dev);
-+int yaffs2_checkpt_required(struct yaffs_dev *dev);
-+int yaffs_calc_checkpt_blocks_required(struct yaffs_dev *dev);
-+
-+void yaffs2_checkpt_invalidate(struct yaffs_dev *dev);
-+int yaffs2_checkpt_save(struct yaffs_dev *dev);
-+int yaffs2_checkpt_restore(struct yaffs_dev *dev);
-+
-+int yaffs2_handle_hole(struct yaffs_obj *obj, loff_t new_size);
-+int yaffs2_scan_backwards(struct yaffs_dev *dev);
-+
-+#endif
-diff -Nur linux-3.18.14.orig/fs/yaffs2/yportenv.h linux-3.18.14/fs/yaffs2/yportenv.h
---- linux-3.18.14.orig/fs/yaffs2/yportenv.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.18.14/fs/yaffs2/yportenv.h 2015-06-14 21:23:22.000000000 +0200
-@@ -0,0 +1,85 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YPORTENV_H__
-+#define __YPORTENV_H__
-+
-+/*
-+ * Define the MTD version in terms of Linux Kernel versions
-+ * This allows yaffs to be used independantly of the kernel
-+ * as well as with it.
-+ */
-+
-+#define MTD_VERSION(a, b, c) (((a) << 16) + ((b) << 8) + (c))
-+
-+#ifdef YAFFS_OUT_OF_TREE
-+#include "moduleconfig.h"
-+#endif
-+
-+#include <linux/version.h>
-+#define MTD_VERSION_CODE LINUX_VERSION_CODE
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
-+#include <linux/config.h>
-+#endif
-+#include <linux/version.h>
-+#include <linux/kernel.h>
-+#include <linux/mm.h>
-+#include <linux/sched.h>
-+#include <linux/string.h>
-+#include <linux/slab.h>
-+#include <linux/vmalloc.h>
-+#include <linux/xattr.h>
-+#include <linux/list.h>
-+#include <linux/types.h>
-+#include <linux/fs.h>
-+#include <linux/stat.h>
-+#include <linux/sort.h>
-+#include <linux/bitops.h>
-+
-+/* These type wrappings are used to support Unicode names in WinCE. */
-+#define YCHAR char
-+#define YUCHAR unsigned char
-+#define _Y(x) x
-+
-+#define YAFFS_LOSTNFOUND_NAME "lost+found"
-+#define YAFFS_LOSTNFOUND_PREFIX "obj"
-+
-+
-+#define YAFFS_ROOT_MODE 0755
-+#define YAFFS_LOSTNFOUND_MODE 0700
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+#define Y_CURRENT_TIME CURRENT_TIME.tv_sec
-+#define Y_TIME_CONVERT(x) (x).tv_sec
-+#else
-+#define Y_CURRENT_TIME CURRENT_TIME
-+#define Y_TIME_CONVERT(x) (x)
-+#endif
-+
-+#define compile_time_assertion(assertion) \
-+ ({ int x = __builtin_choose_expr(assertion, 0, (void)0); (void) x; })
-+
-+
-+#define yaffs_printf(msk, fmt, ...) \
-+ printk(KERN_DEBUG "yaffs: " fmt "\n", ##__VA_ARGS__)
-+
-+#define yaffs_trace(msk, fmt, ...) do { \
-+ if (yaffs_trace_mask & (msk)) \
-+ printk(KERN_DEBUG "yaffs: " fmt "\n", ##__VA_ARGS__); \
-+} while (0)
-+
-+
-+#endif
diff --git a/target/linux/patches/3.4.113/yaffs2.patch b/target/linux/patches/3.4.113/yaffs2.patch
deleted file mode 100644
index 44c95915f..000000000
--- a/target/linux/patches/3.4.113/yaffs2.patch
+++ /dev/null
@@ -1,16550 +0,0 @@
-diff -Nur linux-3.4.90.orig/fs/Kconfig linux-3.4.90/fs/Kconfig
---- linux-3.4.90.orig/fs/Kconfig 2014-05-13 14:11:45.000000000 +0200
-+++ linux-3.4.90/fs/Kconfig 2014-05-17 15:08:09.000000000 +0200
-@@ -203,6 +203,7 @@
- source "fs/befs/Kconfig"
- source "fs/bfs/Kconfig"
- source "fs/efs/Kconfig"
-+source "fs/yaffs2/Kconfig"
- source "fs/jffs2/Kconfig"
- # UBIFS File system configuration
- source "fs/ubifs/Kconfig"
-diff -Nur linux-3.4.90.orig/fs/Makefile linux-3.4.90/fs/Makefile
---- linux-3.4.90.orig/fs/Makefile 2014-05-13 14:11:45.000000000 +0200
-+++ linux-3.4.90/fs/Makefile 2014-05-17 15:09:05.000000000 +0200
-@@ -97,6 +97,7 @@
- obj-$(CONFIG_UFS_FS) += ufs/
- obj-$(CONFIG_EFS_FS) += efs/
- obj-$(CONFIG_JFFS2_FS) += jffs2/
-+obj-$(CONFIG_YAFFS_FS) += yaffs2/
- obj-$(CONFIG_LOGFS) += logfs/
- obj-$(CONFIG_UBIFS_FS) += ubifs/
- obj-$(CONFIG_AFFS_FS) += affs/
-diff -Nur linux-3.4.90.orig/fs/yaffs2/Kconfig linux-3.4.90/fs/yaffs2/Kconfig
---- linux-3.4.90.orig/fs/yaffs2/Kconfig 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/Kconfig 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,171 @@
-+#
-+# yaffs file system configurations
-+#
-+
-+config YAFFS_FS
-+ tristate "yaffs2 file system support"
-+ default n
-+ depends on MTD_BLOCK
-+ select YAFFS_YAFFS1
-+ select YAFFS_YAFFS2
-+ help
-+ yaffs2, or Yet Another Flash File System, is a file system
-+ optimised for NAND Flash chips.
-+
-+ To compile the yaffs2 file system support as a module, choose M
-+ here: the module will be called yaffs2.
-+
-+ If unsure, say N.
-+
-+ Further information on yaffs2 is available at
-+ <http://www.aleph1.co.uk/yaffs/>.
-+
-+config YAFFS_YAFFS1
-+ bool "512 byte / page devices"
-+ depends on YAFFS_FS
-+ default y
-+ help
-+ Enable yaffs1 support -- yaffs for 512 byte / page devices
-+
-+ Not needed for 2K-page devices.
-+
-+ If unsure, say Y.
-+
-+config YAFFS_9BYTE_TAGS
-+ bool "Use older-style on-NAND data format with pageStatus byte"
-+ depends on YAFFS_YAFFS1
-+ default n
-+ help
-+
-+ Older-style on-NAND data format has a "pageStatus" byte to record
-+ chunk/page state. This byte is zero when the page is discarded.
-+ Choose this option if you have existing on-NAND data using this
-+ format that you need to continue to support. New data written
-+ also uses the older-style format. Note: Use of this option
-+ generally requires that MTD's oob layout be adjusted to use the
-+ older-style format. See notes on tags formats and MTD versions
-+ in yaffs_mtdif1.c.
-+
-+ If unsure, say N.
-+
-+config YAFFS_DOES_ECC
-+ bool "Lets yaffs do its own ECC"
-+ depends on YAFFS_FS && YAFFS_YAFFS1 && !YAFFS_9BYTE_TAGS
-+ default n
-+ help
-+ This enables yaffs to use its own ECC functions instead of using
-+ the ones from the generic MTD-NAND driver.
-+
-+ If unsure, say N.
-+
-+config YAFFS_ECC_WRONG_ORDER
-+ bool "Use the same ecc byte order as Steven Hill's nand_ecc.c"
-+ depends on YAFFS_FS && YAFFS_DOES_ECC && !YAFFS_9BYTE_TAGS
-+ default n
-+ help
-+ This makes yaffs_ecc.c use the same ecc byte order as Steven
-+ Hill's nand_ecc.c. If not set, then you get the same ecc byte
-+ order as SmartMedia.
-+
-+ If unsure, say N.
-+
-+config YAFFS_YAFFS2
-+ bool "2048 byte (or larger) / page devices"
-+ depends on YAFFS_FS
-+ default y
-+ help
-+ Enable yaffs2 support -- yaffs for >= 2K bytes per page devices
-+
-+ If unsure, say Y.
-+
-+config YAFFS_AUTO_YAFFS2
-+ bool "Autoselect yaffs2 format"
-+ depends on YAFFS_YAFFS2
-+ default y
-+ help
-+ Without this, you need to explicitely use yaffs2 as the file
-+ system type. With this, you can say "yaffs" and yaffs or yaffs2
-+ will be used depending on the device page size (yaffs on
-+ 512-byte page devices, yaffs2 on 2K page devices).
-+
-+ If unsure, say Y.
-+
-+config YAFFS_DISABLE_TAGS_ECC
-+ bool "Disable yaffs from doing ECC on tags by default"
-+ depends on YAFFS_FS && YAFFS_YAFFS2
-+ default n
-+ help
-+ This defaults yaffs to using its own ECC calculations on tags instead of
-+ just relying on the MTD.
-+ This behavior can also be overridden with tags_ecc_on and
-+ tags_ecc_off mount options.
-+
-+ If unsure, say N.
-+
-+config YAFFS_ALWAYS_CHECK_CHUNK_ERASED
-+ bool "Force chunk erase check"
-+ depends on YAFFS_FS
-+ default n
-+ help
-+ Normally yaffs only checks chunks before writing until an erased
-+ chunk is found. This helps to detect any partially written
-+ chunks that might have happened due to power loss.
-+
-+ Enabling this forces on the test that chunks are erased in flash
-+ before writing to them. This takes more time but is potentially
-+ a bit more secure.
-+
-+ Suggest setting Y during development and ironing out driver
-+ issues etc. Suggest setting to N if you want faster writing.
-+
-+ If unsure, say Y.
-+
-+config YAFFS_EMPTY_LOST_AND_FOUND
-+ bool "Empty lost and found on boot"
-+ depends on YAFFS_FS
-+ default n
-+ help
-+ If this is enabled then the contents of lost and found is
-+ automatically dumped at mount.
-+
-+ If unsure, say N.
-+
-+config YAFFS_DISABLE_BLOCK_REFRESHING
-+ bool "Disable yaffs2 block refreshing"
-+ depends on YAFFS_FS
-+ default n
-+ help
-+ If this is set, then block refreshing is disabled.
-+ Block refreshing infrequently refreshes the oldest block in
-+ a yaffs2 file system. This mechanism helps to refresh flash to
-+ mitigate against data loss. This is particularly useful for MLC.
-+
-+ If unsure, say N.
-+
-+config YAFFS_DISABLE_BACKGROUND
-+ bool "Disable yaffs2 background processing"
-+ depends on YAFFS_FS
-+ default n
-+ help
-+ If this is set, then background processing is disabled.
-+ Background processing makes many foreground activities faster.
-+
-+ If unsure, say N.
-+
-+config YAFFS_DISABLE_BAD_BLOCK_MARKING
-+ bool "Disable yaffs2 bad block marking"
-+ depends on YAFFS_FS
-+ default n
-+ help
-+ Useful during early flash bring up to prevent problems causing
-+ lots of bad block marking.
-+
-+ If unsure, say N.
-+
-+config YAFFS_XATTR
-+ bool "Enable yaffs2 xattr support"
-+ depends on YAFFS_FS
-+ default y
-+ help
-+ If this is set then yaffs2 will provide xattr support.
-+ If unsure, say Y.
-diff -Nur linux-3.4.90.orig/fs/yaffs2/Makefile linux-3.4.90/fs/yaffs2/Makefile
---- linux-3.4.90.orig/fs/yaffs2/Makefile 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/Makefile 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,18 @@
-+#
-+# Makefile for the linux YAFFS filesystem routines.
-+#
-+
-+obj-$(CONFIG_YAFFS_FS) += yaffs.o
-+
-+yaffs-y := yaffs_ecc.o yaffs_vfs.o yaffs_guts.o yaffs_checkptrw.o
-+yaffs-y += yaffs_packedtags1.o yaffs_packedtags2.o yaffs_nand.o
-+yaffs-y += yaffs_tagscompat.o yaffs_tagsmarshall.o
-+yaffs-y += yaffs_mtdif.o
-+yaffs-y += yaffs_nameval.o yaffs_attribs.o
-+yaffs-y += yaffs_allocator.o
-+yaffs-y += yaffs_yaffs1.o
-+yaffs-y += yaffs_yaffs2.o
-+yaffs-y += yaffs_bitmap.o
-+yaffs-y += yaffs_summary.o
-+yaffs-y += yaffs_verify.o
-+
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_allocator.c linux-3.4.90/fs/yaffs2/yaffs_allocator.c
---- linux-3.4.90.orig/fs/yaffs2/yaffs_allocator.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_allocator.c 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,357 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_allocator.h"
-+#include "yaffs_guts.h"
-+#include "yaffs_trace.h"
-+#include "yportenv.h"
-+
-+/*
-+ * Each entry in yaffs_tnode_list and yaffs_obj_list hold blocks
-+ * of approx 100 objects that are themn allocated singly.
-+ * This is basically a simplified slab allocator.
-+ *
-+ * We don't use the Linux slab allocator because slab does not allow
-+ * us to dump all the objects in one hit when we do a umount and tear
-+ * down all the tnodes and objects. slab requires that we first free
-+ * the individual objects.
-+ *
-+ * Once yaffs has been mainlined I shall try to motivate for a change
-+ * to slab to provide the extra features we need here.
-+ */
-+
-+struct yaffs_tnode_list {
-+ struct yaffs_tnode_list *next;
-+ struct yaffs_tnode *tnodes;
-+};
-+
-+struct yaffs_obj_list {
-+ struct yaffs_obj_list *next;
-+ struct yaffs_obj *objects;
-+};
-+
-+struct yaffs_allocator {
-+ int n_tnodes_created;
-+ struct yaffs_tnode *free_tnodes;
-+ int n_free_tnodes;
-+ struct yaffs_tnode_list *alloc_tnode_list;
-+
-+ int n_obj_created;
-+ struct list_head free_objs;
-+ int n_free_objects;
-+
-+ struct yaffs_obj_list *allocated_obj_list;
-+};
-+
-+static void yaffs_deinit_raw_tnodes(struct yaffs_dev *dev)
-+{
-+ struct yaffs_allocator *allocator =
-+ (struct yaffs_allocator *)dev->allocator;
-+ struct yaffs_tnode_list *tmp;
-+
-+ if (!allocator) {
-+ BUG();
-+ return;
-+ }
-+
-+ while (allocator->alloc_tnode_list) {
-+ tmp = allocator->alloc_tnode_list->next;
-+
-+ kfree(allocator->alloc_tnode_list->tnodes);
-+ kfree(allocator->alloc_tnode_list);
-+ allocator->alloc_tnode_list = tmp;
-+ }
-+
-+ allocator->free_tnodes = NULL;
-+ allocator->n_free_tnodes = 0;
-+ allocator->n_tnodes_created = 0;
-+}
-+
-+static void yaffs_init_raw_tnodes(struct yaffs_dev *dev)
-+{
-+ struct yaffs_allocator *allocator = dev->allocator;
-+
-+ if (!allocator) {
-+ BUG();
-+ return;
-+ }
-+
-+ allocator->alloc_tnode_list = NULL;
-+ allocator->free_tnodes = NULL;
-+ allocator->n_free_tnodes = 0;
-+ allocator->n_tnodes_created = 0;
-+}
-+
-+static int yaffs_create_tnodes(struct yaffs_dev *dev, int n_tnodes)
-+{
-+ struct yaffs_allocator *allocator =
-+ (struct yaffs_allocator *)dev->allocator;
-+ int i;
-+ struct yaffs_tnode *new_tnodes;
-+ u8 *mem;
-+ struct yaffs_tnode *curr;
-+ struct yaffs_tnode *next;
-+ struct yaffs_tnode_list *tnl;
-+
-+ if (!allocator) {
-+ BUG();
-+ return YAFFS_FAIL;
-+ }
-+
-+ if (n_tnodes < 1)
-+ return YAFFS_OK;
-+
-+ /* make these things */
-+ new_tnodes = kmalloc(n_tnodes * dev->tnode_size, GFP_NOFS);
-+ mem = (u8 *) new_tnodes;
-+
-+ if (!new_tnodes) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs: Could not allocate Tnodes");
-+ return YAFFS_FAIL;
-+ }
-+
-+ /* New hookup for wide tnodes */
-+ for (i = 0; i < n_tnodes - 1; i++) {
-+ curr = (struct yaffs_tnode *)&mem[i * dev->tnode_size];
-+ next = (struct yaffs_tnode *)&mem[(i + 1) * dev->tnode_size];
-+ curr->internal[0] = next;
-+ }
-+
-+ curr = (struct yaffs_tnode *)&mem[(n_tnodes - 1) * dev->tnode_size];
-+ curr->internal[0] = allocator->free_tnodes;
-+ allocator->free_tnodes = (struct yaffs_tnode *)mem;
-+
-+ allocator->n_free_tnodes += n_tnodes;
-+ allocator->n_tnodes_created += n_tnodes;
-+
-+ /* Now add this bunch of tnodes to a list for freeing up.
-+ * NB If we can't add this to the management list it isn't fatal
-+ * but it just means we can't free this bunch of tnodes later.
-+ */
-+ tnl = kmalloc(sizeof(struct yaffs_tnode_list), GFP_NOFS);
-+ if (!tnl) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "Could not add tnodes to management list");
-+ return YAFFS_FAIL;
-+ } else {
-+ tnl->tnodes = new_tnodes;
-+ tnl->next = allocator->alloc_tnode_list;
-+ allocator->alloc_tnode_list = tnl;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_ALLOCATE, "Tnodes added");
-+
-+ return YAFFS_OK;
-+}
-+
-+struct yaffs_tnode *yaffs_alloc_raw_tnode(struct yaffs_dev *dev)
-+{
-+ struct yaffs_allocator *allocator =
-+ (struct yaffs_allocator *)dev->allocator;
-+ struct yaffs_tnode *tn = NULL;
-+
-+ if (!allocator) {
-+ BUG();
-+ return NULL;
-+ }
-+
-+ /* If there are none left make more */
-+ if (!allocator->free_tnodes)
-+ yaffs_create_tnodes(dev, YAFFS_ALLOCATION_NTNODES);
-+
-+ if (allocator->free_tnodes) {
-+ tn = allocator->free_tnodes;
-+ allocator->free_tnodes = allocator->free_tnodes->internal[0];
-+ allocator->n_free_tnodes--;
-+ }
-+
-+ return tn;
-+}
-+
-+/* FreeTnode frees up a tnode and puts it back on the free list */
-+void yaffs_free_raw_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn)
-+{
-+ struct yaffs_allocator *allocator = dev->allocator;
-+
-+ if (!allocator) {
-+ BUG();
-+ return;
-+ }
-+
-+ if (tn) {
-+ tn->internal[0] = allocator->free_tnodes;
-+ allocator->free_tnodes = tn;
-+ allocator->n_free_tnodes++;
-+ }
-+ dev->checkpoint_blocks_required = 0; /* force recalculation */
-+}
-+
-+/*--------------- yaffs_obj alloaction ------------------------
-+ *
-+ * Free yaffs_objs are stored in a list using obj->siblings.
-+ * The blocks of allocated objects are stored in a linked list.
-+ */
-+
-+static void yaffs_init_raw_objs(struct yaffs_dev *dev)
-+{
-+ struct yaffs_allocator *allocator = dev->allocator;
-+
-+ if (!allocator) {
-+ BUG();
-+ return;
-+ }
-+
-+ allocator->allocated_obj_list = NULL;
-+ INIT_LIST_HEAD(&allocator->free_objs);
-+ allocator->n_free_objects = 0;
-+}
-+
-+static void yaffs_deinit_raw_objs(struct yaffs_dev *dev)
-+{
-+ struct yaffs_allocator *allocator = dev->allocator;
-+ struct yaffs_obj_list *tmp;
-+
-+ if (!allocator) {
-+ BUG();
-+ return;
-+ }
-+
-+ while (allocator->allocated_obj_list) {
-+ tmp = allocator->allocated_obj_list->next;
-+ kfree(allocator->allocated_obj_list->objects);
-+ kfree(allocator->allocated_obj_list);
-+ allocator->allocated_obj_list = tmp;
-+ }
-+
-+ INIT_LIST_HEAD(&allocator->free_objs);
-+ allocator->n_free_objects = 0;
-+ allocator->n_obj_created = 0;
-+}
-+
-+static int yaffs_create_free_objs(struct yaffs_dev *dev, int n_obj)
-+{
-+ struct yaffs_allocator *allocator = dev->allocator;
-+ int i;
-+ struct yaffs_obj *new_objs;
-+ struct yaffs_obj_list *list;
-+
-+ if (!allocator) {
-+ BUG();
-+ return YAFFS_FAIL;
-+ }
-+
-+ if (n_obj < 1)
-+ return YAFFS_OK;
-+
-+ /* make these things */
-+ new_objs = kmalloc(n_obj * sizeof(struct yaffs_obj), GFP_NOFS);
-+ list = kmalloc(sizeof(struct yaffs_obj_list), GFP_NOFS);
-+
-+ if (!new_objs || !list) {
-+ kfree(new_objs);
-+ new_objs = NULL;
-+ kfree(list);
-+ list = NULL;
-+ yaffs_trace(YAFFS_TRACE_ALLOCATE,
-+ "Could not allocate more objects");
-+ return YAFFS_FAIL;
-+ }
-+
-+ /* Hook them into the free list */
-+ for (i = 0; i < n_obj; i++)
-+ list_add(&new_objs[i].siblings, &allocator->free_objs);
-+
-+ allocator->n_free_objects += n_obj;
-+ allocator->n_obj_created += n_obj;
-+
-+ /* Now add this bunch of Objects to a list for freeing up. */
-+
-+ list->objects = new_objs;
-+ list->next = allocator->allocated_obj_list;
-+ allocator->allocated_obj_list = list;
-+
-+ return YAFFS_OK;
-+}
-+
-+struct yaffs_obj *yaffs_alloc_raw_obj(struct yaffs_dev *dev)
-+{
-+ struct yaffs_obj *obj = NULL;
-+ struct list_head *lh;
-+ struct yaffs_allocator *allocator = dev->allocator;
-+
-+ if (!allocator) {
-+ BUG();
-+ return obj;
-+ }
-+
-+ /* If there are none left make more */
-+ if (list_empty(&allocator->free_objs))
-+ yaffs_create_free_objs(dev, YAFFS_ALLOCATION_NOBJECTS);
-+
-+ if (!list_empty(&allocator->free_objs)) {
-+ lh = allocator->free_objs.next;
-+ obj = list_entry(lh, struct yaffs_obj, siblings);
-+ list_del_init(lh);
-+ allocator->n_free_objects--;
-+ }
-+
-+ return obj;
-+}
-+
-+void yaffs_free_raw_obj(struct yaffs_dev *dev, struct yaffs_obj *obj)
-+{
-+
-+ struct yaffs_allocator *allocator = dev->allocator;
-+
-+ if (!allocator) {
-+ BUG();
-+ return;
-+ }
-+
-+ /* Link into the free list. */
-+ list_add(&obj->siblings, &allocator->free_objs);
-+ allocator->n_free_objects++;
-+}
-+
-+void yaffs_deinit_raw_tnodes_and_objs(struct yaffs_dev *dev)
-+{
-+
-+ if (!dev->allocator) {
-+ BUG();
-+ return;
-+ }
-+
-+ yaffs_deinit_raw_tnodes(dev);
-+ yaffs_deinit_raw_objs(dev);
-+ kfree(dev->allocator);
-+ dev->allocator = NULL;
-+}
-+
-+void yaffs_init_raw_tnodes_and_objs(struct yaffs_dev *dev)
-+{
-+ struct yaffs_allocator *allocator;
-+
-+ if (dev->allocator) {
-+ BUG();
-+ return;
-+ }
-+
-+ allocator = kmalloc(sizeof(struct yaffs_allocator), GFP_NOFS);
-+ if (allocator) {
-+ dev->allocator = allocator;
-+ yaffs_init_raw_tnodes(dev);
-+ yaffs_init_raw_objs(dev);
-+ }
-+}
-+
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_allocator.h linux-3.4.90/fs/yaffs2/yaffs_allocator.h
---- linux-3.4.90.orig/fs/yaffs2/yaffs_allocator.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_allocator.h 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,30 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_ALLOCATOR_H__
-+#define __YAFFS_ALLOCATOR_H__
-+
-+#include "yaffs_guts.h"
-+
-+void yaffs_init_raw_tnodes_and_objs(struct yaffs_dev *dev);
-+void yaffs_deinit_raw_tnodes_and_objs(struct yaffs_dev *dev);
-+
-+struct yaffs_tnode *yaffs_alloc_raw_tnode(struct yaffs_dev *dev);
-+void yaffs_free_raw_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn);
-+
-+struct yaffs_obj *yaffs_alloc_raw_obj(struct yaffs_dev *dev);
-+void yaffs_free_raw_obj(struct yaffs_dev *dev, struct yaffs_obj *obj);
-+
-+#endif
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_attribs.c linux-3.4.90/fs/yaffs2/yaffs_attribs.c
---- linux-3.4.90.orig/fs/yaffs2/yaffs_attribs.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_attribs.c 2014-05-17 16:37:59.000000000 +0200
-@@ -0,0 +1,166 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_guts.h"
-+#include "yaffs_attribs.h"
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0))
-+static inline uid_t ia_uid_read(const struct iattr *iattr)
-+{
-+ return from_kuid(&init_user_ns, iattr->ia_uid);
-+}
-+
-+static inline gid_t ia_gid_read(const struct iattr *iattr)
-+{
-+ return from_kgid(&init_user_ns, iattr->ia_gid);
-+}
-+
-+static inline void ia_uid_write(struct iattr *iattr, uid_t uid)
-+{
-+ iattr->ia_uid = make_kuid(&init_user_ns, uid);
-+}
-+
-+static inline void ia_gid_write(struct iattr *iattr, gid_t gid)
-+{
-+ iattr->ia_gid = make_kgid(&init_user_ns, gid);
-+}
-+#else
-+static inline uid_t ia_uid_read(const struct iattr *iattr)
-+{
-+ return iattr->ia_uid;
-+}
-+
-+static inline gid_t ia_gid_read(const struct iattr *iattr)
-+{
-+ return iattr->ia_gid;
-+}
-+
-+static inline void ia_uid_write(struct iattr *iattr, uid_t uid)
-+{
-+ iattr->ia_uid = uid;
-+}
-+
-+static inline void ia_gid_write(struct iattr *iattr, gid_t gid)
-+{
-+ iattr->ia_gid = gid;
-+}
-+#endif
-+
-+void yaffs_load_attribs(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh)
-+{
-+ obj->yst_uid = oh->yst_uid;
-+ obj->yst_gid = oh->yst_gid;
-+ obj->yst_atime = oh->yst_atime;
-+ obj->yst_mtime = oh->yst_mtime;
-+ obj->yst_ctime = oh->yst_ctime;
-+ obj->yst_rdev = oh->yst_rdev;
-+}
-+
-+void yaffs_load_attribs_oh(struct yaffs_obj_hdr *oh, struct yaffs_obj *obj)
-+{
-+ oh->yst_uid = obj->yst_uid;
-+ oh->yst_gid = obj->yst_gid;
-+ oh->yst_atime = obj->yst_atime;
-+ oh->yst_mtime = obj->yst_mtime;
-+ oh->yst_ctime = obj->yst_ctime;
-+ oh->yst_rdev = obj->yst_rdev;
-+
-+}
-+
-+void yaffs_load_current_time(struct yaffs_obj *obj, int do_a, int do_c)
-+{
-+ obj->yst_mtime = Y_CURRENT_TIME;
-+ if (do_a)
-+ obj->yst_atime = obj->yst_mtime;
-+ if (do_c)
-+ obj->yst_ctime = obj->yst_mtime;
-+}
-+
-+void yaffs_attribs_init(struct yaffs_obj *obj, u32 gid, u32 uid, u32 rdev)
-+{
-+ yaffs_load_current_time(obj, 1, 1);
-+ obj->yst_rdev = rdev;
-+ obj->yst_uid = uid;
-+ obj->yst_gid = gid;
-+}
-+
-+static loff_t yaffs_get_file_size(struct yaffs_obj *obj)
-+{
-+ YCHAR *alias = NULL;
-+ obj = yaffs_get_equivalent_obj(obj);
-+
-+ switch (obj->variant_type) {
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ return obj->variant.file_variant.file_size;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ alias = obj->variant.symlink_variant.alias;
-+ if (!alias)
-+ return 0;
-+ return strnlen(alias, YAFFS_MAX_ALIAS_LENGTH);
-+ default:
-+ return 0;
-+ }
-+}
-+
-+int yaffs_set_attribs(struct yaffs_obj *obj, struct iattr *attr)
-+{
-+ unsigned int valid = attr->ia_valid;
-+
-+ if (valid & ATTR_MODE)
-+ obj->yst_mode = attr->ia_mode;
-+ if (valid & ATTR_UID)
-+ obj->yst_uid = ia_uid_read(attr);
-+ if (valid & ATTR_GID)
-+ obj->yst_gid = ia_gid_read(attr);
-+
-+ if (valid & ATTR_ATIME)
-+ obj->yst_atime = Y_TIME_CONVERT(attr->ia_atime);
-+ if (valid & ATTR_CTIME)
-+ obj->yst_ctime = Y_TIME_CONVERT(attr->ia_ctime);
-+ if (valid & ATTR_MTIME)
-+ obj->yst_mtime = Y_TIME_CONVERT(attr->ia_mtime);
-+
-+ if (valid & ATTR_SIZE)
-+ yaffs_resize_file(obj, attr->ia_size);
-+
-+ yaffs_update_oh(obj, NULL, 1, 0, 0, NULL);
-+
-+ return YAFFS_OK;
-+
-+}
-+
-+int yaffs_get_attribs(struct yaffs_obj *obj, struct iattr *attr)
-+{
-+ unsigned int valid = 0;
-+
-+ attr->ia_mode = obj->yst_mode;
-+ valid |= ATTR_MODE;
-+ ia_uid_write(attr, obj->yst_uid);
-+ valid |= ATTR_UID;
-+ ia_gid_write(attr, obj->yst_gid);
-+ valid |= ATTR_GID;
-+
-+ Y_TIME_CONVERT(attr->ia_atime) = obj->yst_atime;
-+ valid |= ATTR_ATIME;
-+ Y_TIME_CONVERT(attr->ia_ctime) = obj->yst_ctime;
-+ valid |= ATTR_CTIME;
-+ Y_TIME_CONVERT(attr->ia_mtime) = obj->yst_mtime;
-+ valid |= ATTR_MTIME;
-+
-+ attr->ia_size = yaffs_get_file_size(obj);
-+ valid |= ATTR_SIZE;
-+
-+ attr->ia_valid = valid;
-+
-+ return YAFFS_OK;
-+}
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_attribs.h linux-3.4.90/fs/yaffs2/yaffs_attribs.h
---- linux-3.4.90.orig/fs/yaffs2/yaffs_attribs.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_attribs.h 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,28 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_ATTRIBS_H__
-+#define __YAFFS_ATTRIBS_H__
-+
-+#include "yaffs_guts.h"
-+
-+void yaffs_load_attribs(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh);
-+void yaffs_load_attribs_oh(struct yaffs_obj_hdr *oh, struct yaffs_obj *obj);
-+void yaffs_attribs_init(struct yaffs_obj *obj, u32 gid, u32 uid, u32 rdev);
-+void yaffs_load_current_time(struct yaffs_obj *obj, int do_a, int do_c);
-+int yaffs_set_attribs(struct yaffs_obj *obj, struct iattr *attr);
-+int yaffs_get_attribs(struct yaffs_obj *obj, struct iattr *attr);
-+
-+#endif
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_bitmap.c linux-3.4.90/fs/yaffs2/yaffs_bitmap.c
---- linux-3.4.90.orig/fs/yaffs2/yaffs_bitmap.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_bitmap.c 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,97 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_bitmap.h"
-+#include "yaffs_trace.h"
-+/*
-+ * Chunk bitmap manipulations
-+ */
-+
-+static inline u8 *yaffs_block_bits(struct yaffs_dev *dev, int blk)
-+{
-+ if (blk < dev->internal_start_block || blk > dev->internal_end_block) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "BlockBits block %d is not valid",
-+ blk);
-+ BUG();
-+ }
-+ return dev->chunk_bits +
-+ (dev->chunk_bit_stride * (blk - dev->internal_start_block));
-+}
-+
-+void yaffs_verify_chunk_bit_id(struct yaffs_dev *dev, int blk, int chunk)
-+{
-+ if (blk < dev->internal_start_block || blk > dev->internal_end_block ||
-+ chunk < 0 || chunk >= dev->param.chunks_per_block) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "Chunk Id (%d:%d) invalid",
-+ blk, chunk);
-+ BUG();
-+ }
-+}
-+
-+void yaffs_clear_chunk_bits(struct yaffs_dev *dev, int blk)
-+{
-+ u8 *blk_bits = yaffs_block_bits(dev, blk);
-+
-+ memset(blk_bits, 0, dev->chunk_bit_stride);
-+}
-+
-+void yaffs_clear_chunk_bit(struct yaffs_dev *dev, int blk, int chunk)
-+{
-+ u8 *blk_bits = yaffs_block_bits(dev, blk);
-+
-+ yaffs_verify_chunk_bit_id(dev, blk, chunk);
-+ blk_bits[chunk / 8] &= ~(1 << (chunk & 7));
-+}
-+
-+void yaffs_set_chunk_bit(struct yaffs_dev *dev, int blk, int chunk)
-+{
-+ u8 *blk_bits = yaffs_block_bits(dev, blk);
-+
-+ yaffs_verify_chunk_bit_id(dev, blk, chunk);
-+ blk_bits[chunk / 8] |= (1 << (chunk & 7));
-+}
-+
-+int yaffs_check_chunk_bit(struct yaffs_dev *dev, int blk, int chunk)
-+{
-+ u8 *blk_bits = yaffs_block_bits(dev, blk);
-+
-+ yaffs_verify_chunk_bit_id(dev, blk, chunk);
-+ return (blk_bits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0;
-+}
-+
-+int yaffs_still_some_chunks(struct yaffs_dev *dev, int blk)
-+{
-+ u8 *blk_bits = yaffs_block_bits(dev, blk);
-+ int i;
-+
-+ for (i = 0; i < dev->chunk_bit_stride; i++) {
-+ if (*blk_bits)
-+ return 1;
-+ blk_bits++;
-+ }
-+ return 0;
-+}
-+
-+int yaffs_count_chunk_bits(struct yaffs_dev *dev, int blk)
-+{
-+ u8 *blk_bits = yaffs_block_bits(dev, blk);
-+ int i;
-+ int n = 0;
-+
-+ for (i = 0; i < dev->chunk_bit_stride; i++, blk_bits++)
-+ n += hweight8(*blk_bits);
-+
-+ return n;
-+}
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_bitmap.h linux-3.4.90/fs/yaffs2/yaffs_bitmap.h
---- linux-3.4.90.orig/fs/yaffs2/yaffs_bitmap.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_bitmap.h 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,33 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+/*
-+ * Chunk bitmap manipulations
-+ */
-+
-+#ifndef __YAFFS_BITMAP_H__
-+#define __YAFFS_BITMAP_H__
-+
-+#include "yaffs_guts.h"
-+
-+void yaffs_verify_chunk_bit_id(struct yaffs_dev *dev, int blk, int chunk);
-+void yaffs_clear_chunk_bits(struct yaffs_dev *dev, int blk);
-+void yaffs_clear_chunk_bit(struct yaffs_dev *dev, int blk, int chunk);
-+void yaffs_set_chunk_bit(struct yaffs_dev *dev, int blk, int chunk);
-+int yaffs_check_chunk_bit(struct yaffs_dev *dev, int blk, int chunk);
-+int yaffs_still_some_chunks(struct yaffs_dev *dev, int blk);
-+int yaffs_count_chunk_bits(struct yaffs_dev *dev, int blk);
-+
-+#endif
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_checkptrw.c linux-3.4.90/fs/yaffs2/yaffs_checkptrw.c
---- linux-3.4.90.orig/fs/yaffs2/yaffs_checkptrw.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_checkptrw.c 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,474 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_checkptrw.h"
-+#include "yaffs_getblockinfo.h"
-+
-+struct yaffs_checkpt_chunk_hdr {
-+ int version;
-+ int seq;
-+ u32 sum;
-+ u32 xor;
-+} ;
-+
-+
-+static int apply_chunk_offset(struct yaffs_dev *dev, int chunk)
-+{
-+ return chunk - dev->chunk_offset;
-+}
-+
-+static int apply_block_offset(struct yaffs_dev *dev, int block)
-+{
-+ return block - dev->block_offset;
-+}
-+
-+static void yaffs2_checkpt_init_chunk_hdr(struct yaffs_dev *dev)
-+{
-+ struct yaffs_checkpt_chunk_hdr hdr;
-+
-+ hdr.version = YAFFS_CHECKPOINT_VERSION;
-+ hdr.seq = dev->checkpt_page_seq;
-+ hdr.sum = dev->checkpt_sum;
-+ hdr.xor = dev->checkpt_xor;
-+
-+ dev->checkpt_byte_offs = sizeof(hdr);
-+
-+ memcpy(dev->checkpt_buffer, &hdr, sizeof(hdr));
-+}
-+
-+static int yaffs2_checkpt_check_chunk_hdr(struct yaffs_dev *dev)
-+{
-+ struct yaffs_checkpt_chunk_hdr hdr;
-+
-+ memcpy(&hdr, dev->checkpt_buffer, sizeof(hdr));
-+
-+ dev->checkpt_byte_offs = sizeof(hdr);
-+
-+ return hdr.version == YAFFS_CHECKPOINT_VERSION &&
-+ hdr.seq == dev->checkpt_page_seq &&
-+ hdr.sum == dev->checkpt_sum &&
-+ hdr.xor == dev->checkpt_xor;
-+}
-+
-+static int yaffs2_checkpt_space_ok(struct yaffs_dev *dev)
-+{
-+ int blocks_avail = dev->n_erased_blocks - dev->param.n_reserved_blocks;
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "checkpt blocks_avail = %d", blocks_avail);
-+
-+ return (blocks_avail <= 0) ? 0 : 1;
-+}
-+
-+static int yaffs_checkpt_erase(struct yaffs_dev *dev)
-+{
-+ int i;
-+
-+ if (!dev->drv.drv_erase_fn)
-+ return 0;
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "checking blocks %d to %d",
-+ dev->internal_start_block, dev->internal_end_block);
-+
-+ for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, i);
-+ int offset_i = apply_block_offset(dev, i);
-+ int result;
-+
-+ if (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "erasing checkpt block %d", i);
-+
-+ dev->n_erasures++;
-+
-+ result = dev->drv.drv_erase_fn(dev, offset_i);
-+ if(result) {
-+ bi->block_state = YAFFS_BLOCK_STATE_EMPTY;
-+ dev->n_erased_blocks++;
-+ dev->n_free_chunks +=
-+ dev->param.chunks_per_block;
-+ } else {
-+ dev->drv.drv_mark_bad_fn(dev, offset_i);
-+ bi->block_state = YAFFS_BLOCK_STATE_DEAD;
-+ }
-+ }
-+ }
-+
-+ dev->blocks_in_checkpt = 0;
-+
-+ return 1;
-+}
-+
-+static void yaffs2_checkpt_find_erased_block(struct yaffs_dev *dev)
-+{
-+ int i;
-+ int blocks_avail = dev->n_erased_blocks - dev->param.n_reserved_blocks;
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "allocating checkpt block: erased %d reserved %d avail %d next %d ",
-+ dev->n_erased_blocks, dev->param.n_reserved_blocks,
-+ blocks_avail, dev->checkpt_next_block);
-+
-+ if (dev->checkpt_next_block >= 0 &&
-+ dev->checkpt_next_block <= dev->internal_end_block &&
-+ blocks_avail > 0) {
-+
-+ for (i = dev->checkpt_next_block; i <= dev->internal_end_block;
-+ i++) {
-+ struct yaffs_block_info *bi;
-+
-+ bi = yaffs_get_block_info(dev, i);
-+ if (bi->block_state == YAFFS_BLOCK_STATE_EMPTY) {
-+ dev->checkpt_next_block = i + 1;
-+ dev->checkpt_cur_block = i;
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "allocating checkpt block %d", i);
-+ return;
-+ }
-+ }
-+ }
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT, "out of checkpt blocks");
-+
-+ dev->checkpt_next_block = -1;
-+ dev->checkpt_cur_block = -1;
-+}
-+
-+static void yaffs2_checkpt_find_block(struct yaffs_dev *dev)
-+{
-+ int i;
-+ struct yaffs_ext_tags tags;
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "find next checkpt block: start: blocks %d next %d",
-+ dev->blocks_in_checkpt, dev->checkpt_next_block);
-+
-+ if (dev->blocks_in_checkpt < dev->checkpt_max_blocks)
-+ for (i = dev->checkpt_next_block; i <= dev->internal_end_block;
-+ i++) {
-+ int chunk = i * dev->param.chunks_per_block;
-+ enum yaffs_block_state state;
-+ u32 seq;
-+
-+ dev->tagger.read_chunk_tags_fn(dev,
-+ apply_chunk_offset(dev, chunk),
-+ NULL, &tags);
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "find next checkpt block: search: block %d state %d oid %d seq %d eccr %d",
-+ i, (int) state,
-+ tags.obj_id, tags.seq_number,
-+ tags.ecc_result);
-+
-+ if (tags.seq_number != YAFFS_SEQUENCE_CHECKPOINT_DATA)
-+ continue;
-+
-+ dev->tagger.query_block_fn(dev,
-+ apply_block_offset(dev, i),
-+ &state, &seq);
-+ if (state == YAFFS_BLOCK_STATE_DEAD)
-+ continue;
-+
-+ /* Right kind of block */
-+ dev->checkpt_next_block = tags.obj_id;
-+ dev->checkpt_cur_block = i;
-+ dev->checkpt_block_list[dev->blocks_in_checkpt] = i;
-+ dev->blocks_in_checkpt++;
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "found checkpt block %d", i);
-+ return;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT, "found no more checkpt blocks");
-+
-+ dev->checkpt_next_block = -1;
-+ dev->checkpt_cur_block = -1;
-+}
-+
-+int yaffs2_checkpt_open(struct yaffs_dev *dev, int writing)
-+{
-+ int i;
-+
-+ dev->checkpt_open_write = writing;
-+
-+ /* Got the functions we need? */
-+ if (!dev->tagger.write_chunk_tags_fn ||
-+ !dev->tagger.read_chunk_tags_fn ||
-+ !dev->drv.drv_erase_fn ||
-+ !dev->drv.drv_mark_bad_fn)
-+ return 0;
-+
-+ if (writing && !yaffs2_checkpt_space_ok(dev))
-+ return 0;
-+
-+ if (!dev->checkpt_buffer)
-+ dev->checkpt_buffer =
-+ kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS);
-+ if (!dev->checkpt_buffer)
-+ return 0;
-+
-+ dev->checkpt_page_seq = 0;
-+ dev->checkpt_byte_count = 0;
-+ dev->checkpt_sum = 0;
-+ dev->checkpt_xor = 0;
-+ dev->checkpt_cur_block = -1;
-+ dev->checkpt_cur_chunk = -1;
-+ dev->checkpt_next_block = dev->internal_start_block;
-+
-+ if (writing) {
-+ memset(dev->checkpt_buffer, 0, dev->data_bytes_per_chunk);
-+ yaffs2_checkpt_init_chunk_hdr(dev);
-+ return yaffs_checkpt_erase(dev);
-+ }
-+
-+ /* Opening for a read */
-+ /* Set to a value that will kick off a read */
-+ dev->checkpt_byte_offs = dev->data_bytes_per_chunk;
-+ /* A checkpoint block list of 1 checkpoint block per 16 block is
-+ * (hopefully) going to be way more than we need */
-+ dev->blocks_in_checkpt = 0;
-+ dev->checkpt_max_blocks =
-+ (dev->internal_end_block - dev->internal_start_block) / 16 + 2;
-+ dev->checkpt_block_list =
-+ kmalloc(sizeof(int) * dev->checkpt_max_blocks, GFP_NOFS);
-+
-+ if (!dev->checkpt_block_list)
-+ return 0;
-+
-+ for (i = 0; i < dev->checkpt_max_blocks; i++)
-+ dev->checkpt_block_list[i] = -1;
-+
-+ return 1;
-+}
-+
-+int yaffs2_get_checkpt_sum(struct yaffs_dev *dev, u32 * sum)
-+{
-+ u32 composite_sum;
-+
-+ composite_sum = (dev->checkpt_sum << 8) | (dev->checkpt_xor & 0xff);
-+ *sum = composite_sum;
-+ return 1;
-+}
-+
-+static int yaffs2_checkpt_flush_buffer(struct yaffs_dev *dev)
-+{
-+ int chunk;
-+ int offset_chunk;
-+ struct yaffs_ext_tags tags;
-+
-+ if (dev->checkpt_cur_block < 0) {
-+ yaffs2_checkpt_find_erased_block(dev);
-+ dev->checkpt_cur_chunk = 0;
-+ }
-+
-+ if (dev->checkpt_cur_block < 0)
-+ return 0;
-+
-+ tags.is_deleted = 0;
-+ tags.obj_id = dev->checkpt_next_block; /* Hint to next place to look */
-+ tags.chunk_id = dev->checkpt_page_seq + 1;
-+ tags.seq_number = YAFFS_SEQUENCE_CHECKPOINT_DATA;
-+ tags.n_bytes = dev->data_bytes_per_chunk;
-+ if (dev->checkpt_cur_chunk == 0) {
-+ /* First chunk we write for the block? Set block state to
-+ checkpoint */
-+ struct yaffs_block_info *bi =
-+ yaffs_get_block_info(dev, dev->checkpt_cur_block);
-+ bi->block_state = YAFFS_BLOCK_STATE_CHECKPOINT;
-+ dev->blocks_in_checkpt++;
-+ }
-+
-+ chunk =
-+ dev->checkpt_cur_block * dev->param.chunks_per_block +
-+ dev->checkpt_cur_chunk;
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "checkpoint wite buffer nand %d(%d:%d) objid %d chId %d",
-+ chunk, dev->checkpt_cur_block, dev->checkpt_cur_chunk,
-+ tags.obj_id, tags.chunk_id);
-+
-+ offset_chunk = apply_chunk_offset(dev, chunk);
-+
-+ dev->n_page_writes++;
-+
-+ dev->tagger.write_chunk_tags_fn(dev, offset_chunk,
-+ dev->checkpt_buffer, &tags);
-+ dev->checkpt_page_seq++;
-+ dev->checkpt_cur_chunk++;
-+ if (dev->checkpt_cur_chunk >= dev->param.chunks_per_block) {
-+ dev->checkpt_cur_chunk = 0;
-+ dev->checkpt_cur_block = -1;
-+ }
-+ memset(dev->checkpt_buffer, 0, dev->data_bytes_per_chunk);
-+
-+ yaffs2_checkpt_init_chunk_hdr(dev);
-+
-+
-+ return 1;
-+}
-+
-+int yaffs2_checkpt_wr(struct yaffs_dev *dev, const void *data, int n_bytes)
-+{
-+ int i = 0;
-+ int ok = 1;
-+ u8 *data_bytes = (u8 *) data;
-+
-+ if (!dev->checkpt_buffer)
-+ return 0;
-+
-+ if (!dev->checkpt_open_write)
-+ return -1;
-+
-+ while (i < n_bytes && ok) {
-+ dev->checkpt_buffer[dev->checkpt_byte_offs] = *data_bytes;
-+ dev->checkpt_sum += *data_bytes;
-+ dev->checkpt_xor ^= *data_bytes;
-+
-+ dev->checkpt_byte_offs++;
-+ i++;
-+ data_bytes++;
-+ dev->checkpt_byte_count++;
-+
-+ if (dev->checkpt_byte_offs < 0 ||
-+ dev->checkpt_byte_offs >= dev->data_bytes_per_chunk)
-+ ok = yaffs2_checkpt_flush_buffer(dev);
-+ }
-+
-+ return i;
-+}
-+
-+int yaffs2_checkpt_rd(struct yaffs_dev *dev, void *data, int n_bytes)
-+{
-+ int i = 0;
-+ int ok = 1;
-+ struct yaffs_ext_tags tags;
-+ int chunk;
-+ int offset_chunk;
-+ u8 *data_bytes = (u8 *) data;
-+
-+ if (!dev->checkpt_buffer)
-+ return 0;
-+
-+ if (dev->checkpt_open_write)
-+ return -1;
-+
-+ while (i < n_bytes && ok) {
-+
-+ if (dev->checkpt_byte_offs < 0 ||
-+ dev->checkpt_byte_offs >= dev->data_bytes_per_chunk) {
-+
-+ if (dev->checkpt_cur_block < 0) {
-+ yaffs2_checkpt_find_block(dev);
-+ dev->checkpt_cur_chunk = 0;
-+ }
-+
-+ if (dev->checkpt_cur_block < 0) {
-+ ok = 0;
-+ break;
-+ }
-+
-+ chunk = dev->checkpt_cur_block *
-+ dev->param.chunks_per_block +
-+ dev->checkpt_cur_chunk;
-+
-+ offset_chunk = apply_chunk_offset(dev, chunk);
-+ dev->n_page_reads++;
-+
-+ /* read in the next chunk */
-+ dev->tagger.read_chunk_tags_fn(dev,
-+ offset_chunk,
-+ dev->checkpt_buffer,
-+ &tags);
-+
-+ if (tags.chunk_id != (dev->checkpt_page_seq + 1) ||
-+ tags.ecc_result > YAFFS_ECC_RESULT_FIXED ||
-+ tags.seq_number != YAFFS_SEQUENCE_CHECKPOINT_DATA) {
-+ ok = 0;
-+ break;
-+ }
-+ if(!yaffs2_checkpt_check_chunk_hdr(dev)) {
-+ ok = 0;
-+ break;
-+ }
-+
-+ dev->checkpt_page_seq++;
-+ dev->checkpt_cur_chunk++;
-+
-+ if (dev->checkpt_cur_chunk >=
-+ dev->param.chunks_per_block)
-+ dev->checkpt_cur_block = -1;
-+
-+ }
-+
-+ *data_bytes = dev->checkpt_buffer[dev->checkpt_byte_offs];
-+ dev->checkpt_sum += *data_bytes;
-+ dev->checkpt_xor ^= *data_bytes;
-+ dev->checkpt_byte_offs++;
-+ i++;
-+ data_bytes++;
-+ dev->checkpt_byte_count++;
-+ }
-+
-+ return i;
-+}
-+
-+int yaffs_checkpt_close(struct yaffs_dev *dev)
-+{
-+ int i;
-+
-+ if (dev->checkpt_open_write) {
-+ if (dev->checkpt_byte_offs !=
-+ sizeof(sizeof(struct yaffs_checkpt_chunk_hdr)))
-+ yaffs2_checkpt_flush_buffer(dev);
-+ } else if (dev->checkpt_block_list) {
-+ for (i = 0;
-+ i < dev->blocks_in_checkpt &&
-+ dev->checkpt_block_list[i] >= 0; i++) {
-+ int blk = dev->checkpt_block_list[i];
-+ struct yaffs_block_info *bi = NULL;
-+
-+ if (dev->internal_start_block <= blk &&
-+ blk <= dev->internal_end_block)
-+ bi = yaffs_get_block_info(dev, blk);
-+ if (bi && bi->block_state == YAFFS_BLOCK_STATE_EMPTY)
-+ bi->block_state = YAFFS_BLOCK_STATE_CHECKPOINT;
-+ }
-+ kfree(dev->checkpt_block_list);
-+ dev->checkpt_block_list = NULL;
-+ }
-+
-+ dev->n_free_chunks -=
-+ dev->blocks_in_checkpt * dev->param.chunks_per_block;
-+ dev->n_erased_blocks -= dev->blocks_in_checkpt;
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT, "checkpoint byte count %d",
-+ dev->checkpt_byte_count);
-+
-+ if (dev->checkpt_buffer) {
-+ /* free the buffer */
-+ kfree(dev->checkpt_buffer);
-+ dev->checkpt_buffer = NULL;
-+ return 1;
-+ } else {
-+ return 0;
-+ }
-+}
-+
-+int yaffs2_checkpt_invalidate_stream(struct yaffs_dev *dev)
-+{
-+ /* Erase the checkpoint data */
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "checkpoint invalidate of %d blocks",
-+ dev->blocks_in_checkpt);
-+
-+ return yaffs_checkpt_erase(dev);
-+}
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_checkptrw.h linux-3.4.90/fs/yaffs2/yaffs_checkptrw.h
---- linux-3.4.90.orig/fs/yaffs2/yaffs_checkptrw.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_checkptrw.h 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,33 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_CHECKPTRW_H__
-+#define __YAFFS_CHECKPTRW_H__
-+
-+#include "yaffs_guts.h"
-+
-+int yaffs2_checkpt_open(struct yaffs_dev *dev, int writing);
-+
-+int yaffs2_checkpt_wr(struct yaffs_dev *dev, const void *data, int n_bytes);
-+
-+int yaffs2_checkpt_rd(struct yaffs_dev *dev, void *data, int n_bytes);
-+
-+int yaffs2_get_checkpt_sum(struct yaffs_dev *dev, u32 * sum);
-+
-+int yaffs_checkpt_close(struct yaffs_dev *dev);
-+
-+int yaffs2_checkpt_invalidate_stream(struct yaffs_dev *dev);
-+
-+#endif
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_ecc.c linux-3.4.90/fs/yaffs2/yaffs_ecc.c
---- linux-3.4.90.orig/fs/yaffs2/yaffs_ecc.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_ecc.c 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,281 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+/*
-+ * This code implements the ECC algorithm used in SmartMedia.
-+ *
-+ * The ECC comprises 22 bits of parity information and is stuffed into 3 bytes.
-+ * The two unused bit are set to 1.
-+ * The ECC can correct single bit errors in a 256-byte page of data. Thus, two
-+ * such ECC blocks are used on a 512-byte NAND page.
-+ *
-+ */
-+
-+#include "yportenv.h"
-+
-+#include "yaffs_ecc.h"
-+
-+/* Table generated by gen-ecc.c
-+ * Using a table means we do not have to calculate p1..p4 and p1'..p4'
-+ * for each byte of data. These are instead provided in a table in bits7..2.
-+ * Bit 0 of each entry indicates whether the entry has an odd or even parity,
-+ * and therefore this bytes influence on the line parity.
-+ */
-+
-+static const unsigned char column_parity_table[] = {
-+ 0x00, 0x55, 0x59, 0x0c, 0x65, 0x30, 0x3c, 0x69,
-+ 0x69, 0x3c, 0x30, 0x65, 0x0c, 0x59, 0x55, 0x00,
-+ 0x95, 0xc0, 0xcc, 0x99, 0xf0, 0xa5, 0xa9, 0xfc,
-+ 0xfc, 0xa9, 0xa5, 0xf0, 0x99, 0xcc, 0xc0, 0x95,
-+ 0x99, 0xcc, 0xc0, 0x95, 0xfc, 0xa9, 0xa5, 0xf0,
-+ 0xf0, 0xa5, 0xa9, 0xfc, 0x95, 0xc0, 0xcc, 0x99,
-+ 0x0c, 0x59, 0x55, 0x00, 0x69, 0x3c, 0x30, 0x65,
-+ 0x65, 0x30, 0x3c, 0x69, 0x00, 0x55, 0x59, 0x0c,
-+ 0xa5, 0xf0, 0xfc, 0xa9, 0xc0, 0x95, 0x99, 0xcc,
-+ 0xcc, 0x99, 0x95, 0xc0, 0xa9, 0xfc, 0xf0, 0xa5,
-+ 0x30, 0x65, 0x69, 0x3c, 0x55, 0x00, 0x0c, 0x59,
-+ 0x59, 0x0c, 0x00, 0x55, 0x3c, 0x69, 0x65, 0x30,
-+ 0x3c, 0x69, 0x65, 0x30, 0x59, 0x0c, 0x00, 0x55,
-+ 0x55, 0x00, 0x0c, 0x59, 0x30, 0x65, 0x69, 0x3c,
-+ 0xa9, 0xfc, 0xf0, 0xa5, 0xcc, 0x99, 0x95, 0xc0,
-+ 0xc0, 0x95, 0x99, 0xcc, 0xa5, 0xf0, 0xfc, 0xa9,
-+ 0xa9, 0xfc, 0xf0, 0xa5, 0xcc, 0x99, 0x95, 0xc0,
-+ 0xc0, 0x95, 0x99, 0xcc, 0xa5, 0xf0, 0xfc, 0xa9,
-+ 0x3c, 0x69, 0x65, 0x30, 0x59, 0x0c, 0x00, 0x55,
-+ 0x55, 0x00, 0x0c, 0x59, 0x30, 0x65, 0x69, 0x3c,
-+ 0x30, 0x65, 0x69, 0x3c, 0x55, 0x00, 0x0c, 0x59,
-+ 0x59, 0x0c, 0x00, 0x55, 0x3c, 0x69, 0x65, 0x30,
-+ 0xa5, 0xf0, 0xfc, 0xa9, 0xc0, 0x95, 0x99, 0xcc,
-+ 0xcc, 0x99, 0x95, 0xc0, 0xa9, 0xfc, 0xf0, 0xa5,
-+ 0x0c, 0x59, 0x55, 0x00, 0x69, 0x3c, 0x30, 0x65,
-+ 0x65, 0x30, 0x3c, 0x69, 0x00, 0x55, 0x59, 0x0c,
-+ 0x99, 0xcc, 0xc0, 0x95, 0xfc, 0xa9, 0xa5, 0xf0,
-+ 0xf0, 0xa5, 0xa9, 0xfc, 0x95, 0xc0, 0xcc, 0x99,
-+ 0x95, 0xc0, 0xcc, 0x99, 0xf0, 0xa5, 0xa9, 0xfc,
-+ 0xfc, 0xa9, 0xa5, 0xf0, 0x99, 0xcc, 0xc0, 0x95,
-+ 0x00, 0x55, 0x59, 0x0c, 0x65, 0x30, 0x3c, 0x69,
-+ 0x69, 0x3c, 0x30, 0x65, 0x0c, 0x59, 0x55, 0x00,
-+};
-+
-+
-+/* Calculate the ECC for a 256-byte block of data */
-+void yaffs_ecc_calc(const unsigned char *data, unsigned char *ecc)
-+{
-+ unsigned int i;
-+ unsigned char col_parity = 0;
-+ unsigned char line_parity = 0;
-+ unsigned char line_parity_prime = 0;
-+ unsigned char t;
-+ unsigned char b;
-+
-+ for (i = 0; i < 256; i++) {
-+ b = column_parity_table[*data++];
-+ col_parity ^= b;
-+
-+ if (b & 0x01) { /* odd number of bits in the byte */
-+ line_parity ^= i;
-+ line_parity_prime ^= ~i;
-+ }
-+ }
-+
-+ ecc[2] = (~col_parity) | 0x03;
-+
-+ t = 0;
-+ if (line_parity & 0x80)
-+ t |= 0x80;
-+ if (line_parity_prime & 0x80)
-+ t |= 0x40;
-+ if (line_parity & 0x40)
-+ t |= 0x20;
-+ if (line_parity_prime & 0x40)
-+ t |= 0x10;
-+ if (line_parity & 0x20)
-+ t |= 0x08;
-+ if (line_parity_prime & 0x20)
-+ t |= 0x04;
-+ if (line_parity & 0x10)
-+ t |= 0x02;
-+ if (line_parity_prime & 0x10)
-+ t |= 0x01;
-+ ecc[1] = ~t;
-+
-+ t = 0;
-+ if (line_parity & 0x08)
-+ t |= 0x80;
-+ if (line_parity_prime & 0x08)
-+ t |= 0x40;
-+ if (line_parity & 0x04)
-+ t |= 0x20;
-+ if (line_parity_prime & 0x04)
-+ t |= 0x10;
-+ if (line_parity & 0x02)
-+ t |= 0x08;
-+ if (line_parity_prime & 0x02)
-+ t |= 0x04;
-+ if (line_parity & 0x01)
-+ t |= 0x02;
-+ if (line_parity_prime & 0x01)
-+ t |= 0x01;
-+ ecc[0] = ~t;
-+
-+}
-+
-+/* Correct the ECC on a 256 byte block of data */
-+
-+int yaffs_ecc_correct(unsigned char *data, unsigned char *read_ecc,
-+ const unsigned char *test_ecc)
-+{
-+ unsigned char d0, d1, d2; /* deltas */
-+
-+ d0 = read_ecc[0] ^ test_ecc[0];
-+ d1 = read_ecc[1] ^ test_ecc[1];
-+ d2 = read_ecc[2] ^ test_ecc[2];
-+
-+ if ((d0 | d1 | d2) == 0)
-+ return 0; /* no error */
-+
-+ if (((d0 ^ (d0 >> 1)) & 0x55) == 0x55 &&
-+ ((d1 ^ (d1 >> 1)) & 0x55) == 0x55 &&
-+ ((d2 ^ (d2 >> 1)) & 0x54) == 0x54) {
-+ /* Single bit (recoverable) error in data */
-+
-+ unsigned byte;
-+ unsigned bit;
-+
-+ bit = byte = 0;
-+
-+ if (d1 & 0x80)
-+ byte |= 0x80;
-+ if (d1 & 0x20)
-+ byte |= 0x40;
-+ if (d1 & 0x08)
-+ byte |= 0x20;
-+ if (d1 & 0x02)
-+ byte |= 0x10;
-+ if (d0 & 0x80)
-+ byte |= 0x08;
-+ if (d0 & 0x20)
-+ byte |= 0x04;
-+ if (d0 & 0x08)
-+ byte |= 0x02;
-+ if (d0 & 0x02)
-+ byte |= 0x01;
-+
-+ if (d2 & 0x80)
-+ bit |= 0x04;
-+ if (d2 & 0x20)
-+ bit |= 0x02;
-+ if (d2 & 0x08)
-+ bit |= 0x01;
-+
-+ data[byte] ^= (1 << bit);
-+
-+ return 1; /* Corrected the error */
-+ }
-+
-+ if ((hweight8(d0) + hweight8(d1) + hweight8(d2)) == 1) {
-+ /* Reccoverable error in ecc */
-+
-+ read_ecc[0] = test_ecc[0];
-+ read_ecc[1] = test_ecc[1];
-+ read_ecc[2] = test_ecc[2];
-+
-+ return 1; /* Corrected the error */
-+ }
-+
-+ /* Unrecoverable error */
-+
-+ return -1;
-+
-+}
-+
-+/*
-+ * ECCxxxOther does ECC calcs on arbitrary n bytes of data
-+ */
-+void yaffs_ecc_calc_other(const unsigned char *data, unsigned n_bytes,
-+ struct yaffs_ecc_other *ecc_other)
-+{
-+ unsigned int i;
-+ unsigned char col_parity = 0;
-+ unsigned line_parity = 0;
-+ unsigned line_parity_prime = 0;
-+ unsigned char b;
-+
-+ for (i = 0; i < n_bytes; i++) {
-+ b = column_parity_table[*data++];
-+ col_parity ^= b;
-+
-+ if (b & 0x01) {
-+ /* odd number of bits in the byte */
-+ line_parity ^= i;
-+ line_parity_prime ^= ~i;
-+ }
-+
-+ }
-+
-+ ecc_other->col_parity = (col_parity >> 2) & 0x3f;
-+ ecc_other->line_parity = line_parity;
-+ ecc_other->line_parity_prime = line_parity_prime;
-+}
-+
-+int yaffs_ecc_correct_other(unsigned char *data, unsigned n_bytes,
-+ struct yaffs_ecc_other *read_ecc,
-+ const struct yaffs_ecc_other *test_ecc)
-+{
-+ unsigned char delta_col; /* column parity delta */
-+ unsigned delta_line; /* line parity delta */
-+ unsigned delta_line_prime; /* line parity delta */
-+ unsigned bit;
-+
-+ delta_col = read_ecc->col_parity ^ test_ecc->col_parity;
-+ delta_line = read_ecc->line_parity ^ test_ecc->line_parity;
-+ delta_line_prime =
-+ read_ecc->line_parity_prime ^ test_ecc->line_parity_prime;
-+
-+ if ((delta_col | delta_line | delta_line_prime) == 0)
-+ return 0; /* no error */
-+
-+ if (delta_line == ~delta_line_prime &&
-+ (((delta_col ^ (delta_col >> 1)) & 0x15) == 0x15)) {
-+ /* Single bit (recoverable) error in data */
-+
-+ bit = 0;
-+
-+ if (delta_col & 0x20)
-+ bit |= 0x04;
-+ if (delta_col & 0x08)
-+ bit |= 0x02;
-+ if (delta_col & 0x02)
-+ bit |= 0x01;
-+
-+ if (delta_line >= n_bytes)
-+ return -1;
-+
-+ data[delta_line] ^= (1 << bit);
-+
-+ return 1; /* corrected */
-+ }
-+
-+ if ((hweight32(delta_line) +
-+ hweight32(delta_line_prime) +
-+ hweight8(delta_col)) == 1) {
-+ /* Reccoverable error in ecc */
-+
-+ *read_ecc = *test_ecc;
-+ return 1; /* corrected */
-+ }
-+
-+ /* Unrecoverable error */
-+
-+ return -1;
-+}
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_ecc.h linux-3.4.90/fs/yaffs2/yaffs_ecc.h
---- linux-3.4.90.orig/fs/yaffs2/yaffs_ecc.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_ecc.h 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,44 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+/*
-+ * This code implements the ECC algorithm used in SmartMedia.
-+ *
-+ * The ECC comprises 22 bits of parity information and is stuffed into 3 bytes.
-+ * The two unused bit are set to 1.
-+ * The ECC can correct single bit errors in a 256-byte page of data.
-+ * Thus, two such ECC blocks are used on a 512-byte NAND page.
-+ *
-+ */
-+
-+#ifndef __YAFFS_ECC_H__
-+#define __YAFFS_ECC_H__
-+
-+struct yaffs_ecc_other {
-+ unsigned char col_parity;
-+ unsigned line_parity;
-+ unsigned line_parity_prime;
-+};
-+
-+void yaffs_ecc_calc(const unsigned char *data, unsigned char *ecc);
-+int yaffs_ecc_correct(unsigned char *data, unsigned char *read_ecc,
-+ const unsigned char *test_ecc);
-+
-+void yaffs_ecc_calc_other(const unsigned char *data, unsigned n_bytes,
-+ struct yaffs_ecc_other *ecc);
-+int yaffs_ecc_correct_other(unsigned char *data, unsigned n_bytes,
-+ struct yaffs_ecc_other *read_ecc,
-+ const struct yaffs_ecc_other *test_ecc);
-+#endif
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_getblockinfo.h linux-3.4.90/fs/yaffs2/yaffs_getblockinfo.h
---- linux-3.4.90.orig/fs/yaffs2/yaffs_getblockinfo.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_getblockinfo.h 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,35 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_GETBLOCKINFO_H__
-+#define __YAFFS_GETBLOCKINFO_H__
-+
-+#include "yaffs_guts.h"
-+#include "yaffs_trace.h"
-+
-+/* Function to manipulate block info */
-+static inline struct yaffs_block_info *yaffs_get_block_info(struct yaffs_dev
-+ *dev, int blk)
-+{
-+ if (blk < dev->internal_start_block || blk > dev->internal_end_block) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "**>> yaffs: get_block_info block %d is not valid",
-+ blk);
-+ BUG();
-+ }
-+ return &dev->block_info[blk - dev->internal_start_block];
-+}
-+
-+#endif
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_guts.c linux-3.4.90/fs/yaffs2/yaffs_guts.c
---- linux-3.4.90.orig/fs/yaffs2/yaffs_guts.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_guts.c 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,5146 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yportenv.h"
-+#include "yaffs_trace.h"
-+
-+#include "yaffs_guts.h"
-+#include "yaffs_getblockinfo.h"
-+#include "yaffs_tagscompat.h"
-+#include "yaffs_tagsmarshall.h"
-+#include "yaffs_nand.h"
-+#include "yaffs_yaffs1.h"
-+#include "yaffs_yaffs2.h"
-+#include "yaffs_bitmap.h"
-+#include "yaffs_verify.h"
-+#include "yaffs_nand.h"
-+#include "yaffs_packedtags2.h"
-+#include "yaffs_nameval.h"
-+#include "yaffs_allocator.h"
-+#include "yaffs_attribs.h"
-+#include "yaffs_summary.h"
-+
-+/* Note YAFFS_GC_GOOD_ENOUGH must be <= YAFFS_GC_PASSIVE_THRESHOLD */
-+#define YAFFS_GC_GOOD_ENOUGH 2
-+#define YAFFS_GC_PASSIVE_THRESHOLD 4
-+
-+#include "yaffs_ecc.h"
-+
-+/* Forward declarations */
-+
-+static int yaffs_wr_data_obj(struct yaffs_obj *in, int inode_chunk,
-+ const u8 *buffer, int n_bytes, int use_reserve);
-+
-+static void yaffs_fix_null_name(struct yaffs_obj *obj, YCHAR *name,
-+ int buffer_size);
-+
-+/* Function to calculate chunk and offset */
-+
-+void yaffs_addr_to_chunk(struct yaffs_dev *dev, loff_t addr,
-+ int *chunk_out, u32 *offset_out)
-+{
-+ int chunk;
-+ u32 offset;
-+
-+ chunk = (u32) (addr >> dev->chunk_shift);
-+
-+ if (dev->chunk_div == 1) {
-+ /* easy power of 2 case */
-+ offset = (u32) (addr & dev->chunk_mask);
-+ } else {
-+ /* Non power-of-2 case */
-+
-+ loff_t chunk_base;
-+
-+ chunk /= dev->chunk_div;
-+
-+ chunk_base = ((loff_t) chunk) * dev->data_bytes_per_chunk;
-+ offset = (u32) (addr - chunk_base);
-+ }
-+
-+ *chunk_out = chunk;
-+ *offset_out = offset;
-+}
-+
-+/* Function to return the number of shifts for a power of 2 greater than or
-+ * equal to the given number
-+ * Note we don't try to cater for all possible numbers and this does not have to
-+ * be hellishly efficient.
-+ */
-+
-+static inline u32 calc_shifts_ceiling(u32 x)
-+{
-+ int extra_bits;
-+ int shifts;
-+
-+ shifts = extra_bits = 0;
-+
-+ while (x > 1) {
-+ if (x & 1)
-+ extra_bits++;
-+ x >>= 1;
-+ shifts++;
-+ }
-+
-+ if (extra_bits)
-+ shifts++;
-+
-+ return shifts;
-+}
-+
-+/* Function to return the number of shifts to get a 1 in bit 0
-+ */
-+
-+static inline u32 calc_shifts(u32 x)
-+{
-+ u32 shifts;
-+
-+ shifts = 0;
-+
-+ if (!x)
-+ return 0;
-+
-+ while (!(x & 1)) {
-+ x >>= 1;
-+ shifts++;
-+ }
-+
-+ return shifts;
-+}
-+
-+/*
-+ * Temporary buffer manipulations.
-+ */
-+
-+static int yaffs_init_tmp_buffers(struct yaffs_dev *dev)
-+{
-+ int i;
-+ u8 *buf = (u8 *) 1;
-+
-+ memset(dev->temp_buffer, 0, sizeof(dev->temp_buffer));
-+
-+ for (i = 0; buf && i < YAFFS_N_TEMP_BUFFERS; i++) {
-+ dev->temp_buffer[i].in_use = 0;
-+ buf = kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS);
-+ dev->temp_buffer[i].buffer = buf;
-+ }
-+
-+ return buf ? YAFFS_OK : YAFFS_FAIL;
-+}
-+
-+u8 *yaffs_get_temp_buffer(struct yaffs_dev * dev)
-+{
-+ int i;
-+
-+ dev->temp_in_use++;
-+ if (dev->temp_in_use > dev->max_temp)
-+ dev->max_temp = dev->temp_in_use;
-+
-+ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
-+ if (dev->temp_buffer[i].in_use == 0) {
-+ dev->temp_buffer[i].in_use = 1;
-+ return dev->temp_buffer[i].buffer;
-+ }
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_BUFFERS, "Out of temp buffers");
-+ /*
-+ * If we got here then we have to allocate an unmanaged one
-+ * This is not good.
-+ */
-+
-+ dev->unmanaged_buffer_allocs++;
-+ return kmalloc(dev->data_bytes_per_chunk, GFP_NOFS);
-+
-+}
-+
-+void yaffs_release_temp_buffer(struct yaffs_dev *dev, u8 *buffer)
-+{
-+ int i;
-+
-+ dev->temp_in_use--;
-+
-+ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
-+ if (dev->temp_buffer[i].buffer == buffer) {
-+ dev->temp_buffer[i].in_use = 0;
-+ return;
-+ }
-+ }
-+
-+ if (buffer) {
-+ /* assume it is an unmanaged one. */
-+ yaffs_trace(YAFFS_TRACE_BUFFERS,
-+ "Releasing unmanaged temp buffer");
-+ kfree(buffer);
-+ dev->unmanaged_buffer_deallocs++;
-+ }
-+
-+}
-+
-+/*
-+ * Functions for robustisizing TODO
-+ *
-+ */
-+
-+static void yaffs_handle_chunk_wr_ok(struct yaffs_dev *dev, int nand_chunk,
-+ const u8 *data,
-+ const struct yaffs_ext_tags *tags)
-+{
-+ (void) dev;
-+ (void) nand_chunk;
-+ (void) data;
-+ (void) tags;
-+}
-+
-+static void yaffs_handle_chunk_update(struct yaffs_dev *dev, int nand_chunk,
-+ const struct yaffs_ext_tags *tags)
-+{
-+ (void) dev;
-+ (void) nand_chunk;
-+ (void) tags;
-+}
-+
-+void yaffs_handle_chunk_error(struct yaffs_dev *dev,
-+ struct yaffs_block_info *bi)
-+{
-+ if (!bi->gc_prioritise) {
-+ bi->gc_prioritise = 1;
-+ dev->has_pending_prioritised_gc = 1;
-+ bi->chunk_error_strikes++;
-+
-+ if (bi->chunk_error_strikes > 3) {
-+ bi->needs_retiring = 1; /* Too many stikes, so retire */
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs: Block struck out");
-+
-+ }
-+ }
-+}
-+
-+static void yaffs_handle_chunk_wr_error(struct yaffs_dev *dev, int nand_chunk,
-+ int erased_ok)
-+{
-+ int flash_block = nand_chunk / dev->param.chunks_per_block;
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, flash_block);
-+
-+ yaffs_handle_chunk_error(dev, bi);
-+
-+ if (erased_ok) {
-+ /* Was an actual write failure,
-+ * so mark the block for retirement.*/
-+ bi->needs_retiring = 1;
-+ yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
-+ "**>> Block %d needs retiring", flash_block);
-+ }
-+
-+ /* Delete the chunk */
-+ yaffs_chunk_del(dev, nand_chunk, 1, __LINE__);
-+ yaffs_skip_rest_of_block(dev);
-+}
-+
-+/*
-+ * Verification code
-+ */
-+
-+/*
-+ * Simple hash function. Needs to have a reasonable spread
-+ */
-+
-+static inline int yaffs_hash_fn(int n)
-+{
-+ if (n < 0)
-+ n = -n;
-+ return n % YAFFS_NOBJECT_BUCKETS;
-+}
-+
-+/*
-+ * Access functions to useful fake objects.
-+ * Note that root might have a presence in NAND if permissions are set.
-+ */
-+
-+struct yaffs_obj *yaffs_root(struct yaffs_dev *dev)
-+{
-+ return dev->root_dir;
-+}
-+
-+struct yaffs_obj *yaffs_lost_n_found(struct yaffs_dev *dev)
-+{
-+ return dev->lost_n_found;
-+}
-+
-+/*
-+ * Erased NAND checking functions
-+ */
-+
-+int yaffs_check_ff(u8 *buffer, int n_bytes)
-+{
-+ /* Horrible, slow implementation */
-+ while (n_bytes--) {
-+ if (*buffer != 0xff)
-+ return 0;
-+ buffer++;
-+ }
-+ return 1;
-+}
-+
-+static int yaffs_check_chunk_erased(struct yaffs_dev *dev, int nand_chunk)
-+{
-+ int retval = YAFFS_OK;
-+ u8 *data = yaffs_get_temp_buffer(dev);
-+ struct yaffs_ext_tags tags;
-+ int result;
-+
-+ result = yaffs_rd_chunk_tags_nand(dev, nand_chunk, data, &tags);
-+
-+ if (tags.ecc_result > YAFFS_ECC_RESULT_NO_ERROR)
-+ retval = YAFFS_FAIL;
-+
-+ if (!yaffs_check_ff(data, dev->data_bytes_per_chunk) ||
-+ tags.chunk_used) {
-+ yaffs_trace(YAFFS_TRACE_NANDACCESS,
-+ "Chunk %d not erased", nand_chunk);
-+ retval = YAFFS_FAIL;
-+ }
-+
-+ yaffs_release_temp_buffer(dev, data);
-+
-+ return retval;
-+
-+}
-+
-+static int yaffs_verify_chunk_written(struct yaffs_dev *dev,
-+ int nand_chunk,
-+ const u8 *data,
-+ struct yaffs_ext_tags *tags)
-+{
-+ int retval = YAFFS_OK;
-+ struct yaffs_ext_tags temp_tags;
-+ u8 *buffer = yaffs_get_temp_buffer(dev);
-+ int result;
-+
-+ result = yaffs_rd_chunk_tags_nand(dev, nand_chunk, buffer, &temp_tags);
-+ if (memcmp(buffer, data, dev->data_bytes_per_chunk) ||
-+ temp_tags.obj_id != tags->obj_id ||
-+ temp_tags.chunk_id != tags->chunk_id ||
-+ temp_tags.n_bytes != tags->n_bytes)
-+ retval = YAFFS_FAIL;
-+
-+ yaffs_release_temp_buffer(dev, buffer);
-+
-+ return retval;
-+}
-+
-+
-+int yaffs_check_alloc_available(struct yaffs_dev *dev, int n_chunks)
-+{
-+ int reserved_chunks;
-+ int reserved_blocks = dev->param.n_reserved_blocks;
-+ int checkpt_blocks;
-+
-+ checkpt_blocks = yaffs_calc_checkpt_blocks_required(dev);
-+
-+ reserved_chunks =
-+ (reserved_blocks + checkpt_blocks) * dev->param.chunks_per_block;
-+
-+ return (dev->n_free_chunks > (reserved_chunks + n_chunks));
-+}
-+
-+static int yaffs_find_alloc_block(struct yaffs_dev *dev)
-+{
-+ int i;
-+ struct yaffs_block_info *bi;
-+
-+ if (dev->n_erased_blocks < 1) {
-+ /* Hoosterman we've got a problem.
-+ * Can't get space to gc
-+ */
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs tragedy: no more erased blocks");
-+
-+ return -1;
-+ }
-+
-+ /* Find an empty block. */
-+
-+ for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
-+ dev->alloc_block_finder++;
-+ if (dev->alloc_block_finder < dev->internal_start_block
-+ || dev->alloc_block_finder > dev->internal_end_block) {
-+ dev->alloc_block_finder = dev->internal_start_block;
-+ }
-+
-+ bi = yaffs_get_block_info(dev, dev->alloc_block_finder);
-+
-+ if (bi->block_state == YAFFS_BLOCK_STATE_EMPTY) {
-+ bi->block_state = YAFFS_BLOCK_STATE_ALLOCATING;
-+ dev->seq_number++;
-+ bi->seq_number = dev->seq_number;
-+ dev->n_erased_blocks--;
-+ yaffs_trace(YAFFS_TRACE_ALLOCATE,
-+ "Allocated block %d, seq %d, %d left" ,
-+ dev->alloc_block_finder, dev->seq_number,
-+ dev->n_erased_blocks);
-+ return dev->alloc_block_finder;
-+ }
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs tragedy: no more erased blocks, but there should have been %d",
-+ dev->n_erased_blocks);
-+
-+ return -1;
-+}
-+
-+static int yaffs_alloc_chunk(struct yaffs_dev *dev, int use_reserver,
-+ struct yaffs_block_info **block_ptr)
-+{
-+ int ret_val;
-+ struct yaffs_block_info *bi;
-+
-+ if (dev->alloc_block < 0) {
-+ /* Get next block to allocate off */
-+ dev->alloc_block = yaffs_find_alloc_block(dev);
-+ dev->alloc_page = 0;
-+ }
-+
-+ if (!use_reserver && !yaffs_check_alloc_available(dev, 1)) {
-+ /* No space unless we're allowed to use the reserve. */
-+ return -1;
-+ }
-+
-+ if (dev->n_erased_blocks < dev->param.n_reserved_blocks
-+ && dev->alloc_page == 0)
-+ yaffs_trace(YAFFS_TRACE_ALLOCATE, "Allocating reserve");
-+
-+ /* Next page please.... */
-+ if (dev->alloc_block >= 0) {
-+ bi = yaffs_get_block_info(dev, dev->alloc_block);
-+
-+ ret_val = (dev->alloc_block * dev->param.chunks_per_block) +
-+ dev->alloc_page;
-+ bi->pages_in_use++;
-+ yaffs_set_chunk_bit(dev, dev->alloc_block, dev->alloc_page);
-+
-+ dev->alloc_page++;
-+
-+ dev->n_free_chunks--;
-+
-+ /* If the block is full set the state to full */
-+ if (dev->alloc_page >= dev->param.chunks_per_block) {
-+ bi->block_state = YAFFS_BLOCK_STATE_FULL;
-+ dev->alloc_block = -1;
-+ }
-+
-+ if (block_ptr)
-+ *block_ptr = bi;
-+
-+ return ret_val;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!");
-+
-+ return -1;
-+}
-+
-+static int yaffs_get_erased_chunks(struct yaffs_dev *dev)
-+{
-+ int n;
-+
-+ n = dev->n_erased_blocks * dev->param.chunks_per_block;
-+
-+ if (dev->alloc_block > 0)
-+ n += (dev->param.chunks_per_block - dev->alloc_page);
-+
-+ return n;
-+
-+}
-+
-+/*
-+ * yaffs_skip_rest_of_block() skips over the rest of the allocation block
-+ * if we don't want to write to it.
-+ */
-+void yaffs_skip_rest_of_block(struct yaffs_dev *dev)
-+{
-+ struct yaffs_block_info *bi;
-+
-+ if (dev->alloc_block > 0) {
-+ bi = yaffs_get_block_info(dev, dev->alloc_block);
-+ if (bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING) {
-+ bi->block_state = YAFFS_BLOCK_STATE_FULL;
-+ dev->alloc_block = -1;
-+ }
-+ }
-+}
-+
-+static int yaffs_write_new_chunk(struct yaffs_dev *dev,
-+ const u8 *data,
-+ struct yaffs_ext_tags *tags, int use_reserver)
-+{
-+ int attempts = 0;
-+ int write_ok = 0;
-+ int chunk;
-+
-+ yaffs2_checkpt_invalidate(dev);
-+
-+ do {
-+ struct yaffs_block_info *bi = 0;
-+ int erased_ok = 0;
-+
-+ chunk = yaffs_alloc_chunk(dev, use_reserver, &bi);
-+ if (chunk < 0) {
-+ /* no space */
-+ break;
-+ }
-+
-+ /* First check this chunk is erased, if it needs
-+ * checking. The checking policy (unless forced
-+ * always on) is as follows:
-+ *
-+ * Check the first page we try to write in a block.
-+ * If the check passes then we don't need to check any
-+ * more. If the check fails, we check again...
-+ * If the block has been erased, we don't need to check.
-+ *
-+ * However, if the block has been prioritised for gc,
-+ * then we think there might be something odd about
-+ * this block and stop using it.
-+ *
-+ * Rationale: We should only ever see chunks that have
-+ * not been erased if there was a partially written
-+ * chunk due to power loss. This checking policy should
-+ * catch that case with very few checks and thus save a
-+ * lot of checks that are most likely not needed.
-+ *
-+ * Mods to the above
-+ * If an erase check fails or the write fails we skip the
-+ * rest of the block.
-+ */
-+
-+ /* let's give it a try */
-+ attempts++;
-+
-+ if (dev->param.always_check_erased)
-+ bi->skip_erased_check = 0;
-+
-+ if (!bi->skip_erased_check) {
-+ erased_ok = yaffs_check_chunk_erased(dev, chunk);
-+ if (erased_ok != YAFFS_OK) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "**>> yaffs chunk %d was not erased",
-+ chunk);
-+
-+ /* If not erased, delete this one,
-+ * skip rest of block and
-+ * try another chunk */
-+ yaffs_chunk_del(dev, chunk, 1, __LINE__);
-+ yaffs_skip_rest_of_block(dev);
-+ continue;
-+ }
-+ }
-+
-+ write_ok = yaffs_wr_chunk_tags_nand(dev, chunk, data, tags);
-+
-+ if (!bi->skip_erased_check)
-+ write_ok =
-+ yaffs_verify_chunk_written(dev, chunk, data, tags);
-+
-+ if (write_ok != YAFFS_OK) {
-+ /* Clean up aborted write, skip to next block and
-+ * try another chunk */
-+ yaffs_handle_chunk_wr_error(dev, chunk, erased_ok);
-+ continue;
-+ }
-+
-+ bi->skip_erased_check = 1;
-+
-+ /* Copy the data into the robustification buffer */
-+ yaffs_handle_chunk_wr_ok(dev, chunk, data, tags);
-+
-+ } while (write_ok != YAFFS_OK &&
-+ (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts));
-+
-+ if (!write_ok)
-+ chunk = -1;
-+
-+ if (attempts > 1) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "**>> yaffs write required %d attempts",
-+ attempts);
-+ dev->n_retried_writes += (attempts - 1);
-+ }
-+
-+ return chunk;
-+}
-+
-+/*
-+ * Block retiring for handling a broken block.
-+ */
-+
-+static void yaffs_retire_block(struct yaffs_dev *dev, int flash_block)
-+{
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, flash_block);
-+
-+ yaffs2_checkpt_invalidate(dev);
-+
-+ yaffs2_clear_oldest_dirty_seq(dev, bi);
-+
-+ if (yaffs_mark_bad(dev, flash_block) != YAFFS_OK) {
-+ if (yaffs_erase_block(dev, flash_block) != YAFFS_OK) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs: Failed to mark bad and erase block %d",
-+ flash_block);
-+ } else {
-+ struct yaffs_ext_tags tags;
-+ int chunk_id =
-+ flash_block * dev->param.chunks_per_block;
-+
-+ u8 *buffer = yaffs_get_temp_buffer(dev);
-+
-+ memset(buffer, 0xff, dev->data_bytes_per_chunk);
-+ memset(&tags, 0, sizeof(tags));
-+ tags.seq_number = YAFFS_SEQUENCE_BAD_BLOCK;
-+ if (dev->tagger.write_chunk_tags_fn(dev, chunk_id -
-+ dev->chunk_offset,
-+ buffer,
-+ &tags) != YAFFS_OK)
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs: Failed to write bad block marker to block %d",
-+ flash_block);
-+
-+ yaffs_release_temp_buffer(dev, buffer);
-+ }
-+ }
-+
-+ bi->block_state = YAFFS_BLOCK_STATE_DEAD;
-+ bi->gc_prioritise = 0;
-+ bi->needs_retiring = 0;
-+
-+ dev->n_retired_blocks++;
-+}
-+
-+/*---------------- Name handling functions ------------*/
-+
-+static u16 yaffs_calc_name_sum(const YCHAR *name)
-+{
-+ u16 sum = 0;
-+ u16 i = 1;
-+
-+ if (!name)
-+ return 0;
-+
-+ while ((*name) && i < (YAFFS_MAX_NAME_LENGTH / 2)) {
-+
-+ /* 0x1f mask is case insensitive */
-+ sum += ((*name) & 0x1f) * i;
-+ i++;
-+ name++;
-+ }
-+ return sum;
-+}
-+
-+
-+void yaffs_set_obj_name(struct yaffs_obj *obj, const YCHAR * name)
-+{
-+ memset(obj->short_name, 0, sizeof(obj->short_name));
-+
-+ if (name && !name[0]) {
-+ yaffs_fix_null_name(obj, obj->short_name,
-+ YAFFS_SHORT_NAME_LENGTH);
-+ name = obj->short_name;
-+ } else if (name &&
-+ strnlen(name, YAFFS_SHORT_NAME_LENGTH + 1) <=
-+ YAFFS_SHORT_NAME_LENGTH) {
-+ strcpy(obj->short_name, name);
-+ }
-+
-+ obj->sum = yaffs_calc_name_sum(name);
-+}
-+
-+void yaffs_set_obj_name_from_oh(struct yaffs_obj *obj,
-+ const struct yaffs_obj_hdr *oh)
-+{
-+#ifdef CONFIG_YAFFS_AUTO_UNICODE
-+ YCHAR tmp_name[YAFFS_MAX_NAME_LENGTH + 1];
-+ memset(tmp_name, 0, sizeof(tmp_name));
-+ yaffs_load_name_from_oh(obj->my_dev, tmp_name, oh->name,
-+ YAFFS_MAX_NAME_LENGTH + 1);
-+ yaffs_set_obj_name(obj, tmp_name);
-+#else
-+ yaffs_set_obj_name(obj, oh->name);
-+#endif
-+}
-+
-+loff_t yaffs_max_file_size(struct yaffs_dev *dev)
-+{
-+ if(sizeof(loff_t) < 8)
-+ return YAFFS_MAX_FILE_SIZE_32;
-+ else
-+ return ((loff_t) YAFFS_MAX_CHUNK_ID) * dev->data_bytes_per_chunk;
-+}
-+
-+/*-------------------- TNODES -------------------
-+
-+ * List of spare tnodes
-+ * The list is hooked together using the first pointer
-+ * in the tnode.
-+ */
-+
-+struct yaffs_tnode *yaffs_get_tnode(struct yaffs_dev *dev)
-+{
-+ struct yaffs_tnode *tn = yaffs_alloc_raw_tnode(dev);
-+
-+ if (tn) {
-+ memset(tn, 0, dev->tnode_size);
-+ dev->n_tnodes++;
-+ }
-+
-+ dev->checkpoint_blocks_required = 0; /* force recalculation */
-+
-+ return tn;
-+}
-+
-+/* FreeTnode frees up a tnode and puts it back on the free list */
-+static void yaffs_free_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn)
-+{
-+ yaffs_free_raw_tnode(dev, tn);
-+ dev->n_tnodes--;
-+ dev->checkpoint_blocks_required = 0; /* force recalculation */
-+}
-+
-+static void yaffs_deinit_tnodes_and_objs(struct yaffs_dev *dev)
-+{
-+ yaffs_deinit_raw_tnodes_and_objs(dev);
-+ dev->n_obj = 0;
-+ dev->n_tnodes = 0;
-+}
-+
-+static void yaffs_load_tnode_0(struct yaffs_dev *dev, struct yaffs_tnode *tn,
-+ unsigned pos, unsigned val)
-+{
-+ u32 *map = (u32 *) tn;
-+ u32 bit_in_map;
-+ u32 bit_in_word;
-+ u32 word_in_map;
-+ u32 mask;
-+
-+ pos &= YAFFS_TNODES_LEVEL0_MASK;
-+ val >>= dev->chunk_grp_bits;
-+
-+ bit_in_map = pos * dev->tnode_width;
-+ word_in_map = bit_in_map / 32;
-+ bit_in_word = bit_in_map & (32 - 1);
-+
-+ mask = dev->tnode_mask << bit_in_word;
-+
-+ map[word_in_map] &= ~mask;
-+ map[word_in_map] |= (mask & (val << bit_in_word));
-+
-+ if (dev->tnode_width > (32 - bit_in_word)) {
-+ bit_in_word = (32 - bit_in_word);
-+ word_in_map++;
-+ mask =
-+ dev->tnode_mask >> bit_in_word;
-+ map[word_in_map] &= ~mask;
-+ map[word_in_map] |= (mask & (val >> bit_in_word));
-+ }
-+}
-+
-+u32 yaffs_get_group_base(struct yaffs_dev *dev, struct yaffs_tnode *tn,
-+ unsigned pos)
-+{
-+ u32 *map = (u32 *) tn;
-+ u32 bit_in_map;
-+ u32 bit_in_word;
-+ u32 word_in_map;
-+ u32 val;
-+
-+ pos &= YAFFS_TNODES_LEVEL0_MASK;
-+
-+ bit_in_map = pos * dev->tnode_width;
-+ word_in_map = bit_in_map / 32;
-+ bit_in_word = bit_in_map & (32 - 1);
-+
-+ val = map[word_in_map] >> bit_in_word;
-+
-+ if (dev->tnode_width > (32 - bit_in_word)) {
-+ bit_in_word = (32 - bit_in_word);
-+ word_in_map++;
-+ val |= (map[word_in_map] << bit_in_word);
-+ }
-+
-+ val &= dev->tnode_mask;
-+ val <<= dev->chunk_grp_bits;
-+
-+ return val;
-+}
-+
-+/* ------------------- End of individual tnode manipulation -----------------*/
-+
-+/* ---------Functions to manipulate the look-up tree (made up of tnodes) ------
-+ * The look up tree is represented by the top tnode and the number of top_level
-+ * in the tree. 0 means only the level 0 tnode is in the tree.
-+ */
-+
-+/* FindLevel0Tnode finds the level 0 tnode, if one exists. */
-+struct yaffs_tnode *yaffs_find_tnode_0(struct yaffs_dev *dev,
-+ struct yaffs_file_var *file_struct,
-+ u32 chunk_id)
-+{
-+ struct yaffs_tnode *tn = file_struct->top;
-+ u32 i;
-+ int required_depth;
-+ int level = file_struct->top_level;
-+
-+ (void) dev;
-+
-+ /* Check sane level and chunk Id */
-+ if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL)
-+ return NULL;
-+
-+ if (chunk_id > YAFFS_MAX_CHUNK_ID)
-+ return NULL;
-+
-+ /* First check we're tall enough (ie enough top_level) */
-+
-+ i = chunk_id >> YAFFS_TNODES_LEVEL0_BITS;
-+ required_depth = 0;
-+ while (i) {
-+ i >>= YAFFS_TNODES_INTERNAL_BITS;
-+ required_depth++;
-+ }
-+
-+ if (required_depth > file_struct->top_level)
-+ return NULL; /* Not tall enough, so we can't find it */
-+
-+ /* Traverse down to level 0 */
-+ while (level > 0 && tn) {
-+ tn = tn->internal[(chunk_id >>
-+ (YAFFS_TNODES_LEVEL0_BITS +
-+ (level - 1) *
-+ YAFFS_TNODES_INTERNAL_BITS)) &
-+ YAFFS_TNODES_INTERNAL_MASK];
-+ level--;
-+ }
-+
-+ return tn;
-+}
-+
-+/* add_find_tnode_0 finds the level 0 tnode if it exists,
-+ * otherwise first expands the tree.
-+ * This happens in two steps:
-+ * 1. If the tree isn't tall enough, then make it taller.
-+ * 2. Scan down the tree towards the level 0 tnode adding tnodes if required.
-+ *
-+ * Used when modifying the tree.
-+ *
-+ * If the tn argument is NULL, then a fresh tnode will be added otherwise the
-+ * specified tn will be plugged into the ttree.
-+ */
-+
-+struct yaffs_tnode *yaffs_add_find_tnode_0(struct yaffs_dev *dev,
-+ struct yaffs_file_var *file_struct,
-+ u32 chunk_id,
-+ struct yaffs_tnode *passed_tn)
-+{
-+ int required_depth;
-+ int i;
-+ int l;
-+ struct yaffs_tnode *tn;
-+ u32 x;
-+
-+ /* Check sane level and page Id */
-+ if (file_struct->top_level < 0 ||
-+ file_struct->top_level > YAFFS_TNODES_MAX_LEVEL)
-+ return NULL;
-+
-+ if (chunk_id > YAFFS_MAX_CHUNK_ID)
-+ return NULL;
-+
-+ /* First check we're tall enough (ie enough top_level) */
-+
-+ x = chunk_id >> YAFFS_TNODES_LEVEL0_BITS;
-+ required_depth = 0;
-+ while (x) {
-+ x >>= YAFFS_TNODES_INTERNAL_BITS;
-+ required_depth++;
-+ }
-+
-+ if (required_depth > file_struct->top_level) {
-+ /* Not tall enough, gotta make the tree taller */
-+ for (i = file_struct->top_level; i < required_depth; i++) {
-+
-+ tn = yaffs_get_tnode(dev);
-+
-+ if (tn) {
-+ tn->internal[0] = file_struct->top;
-+ file_struct->top = tn;
-+ file_struct->top_level++;
-+ } else {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs: no more tnodes");
-+ return NULL;
-+ }
-+ }
-+ }
-+
-+ /* Traverse down to level 0, adding anything we need */
-+
-+ l = file_struct->top_level;
-+ tn = file_struct->top;
-+
-+ if (l > 0) {
-+ while (l > 0 && tn) {
-+ x = (chunk_id >>
-+ (YAFFS_TNODES_LEVEL0_BITS +
-+ (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) &
-+ YAFFS_TNODES_INTERNAL_MASK;
-+
-+ if ((l > 1) && !tn->internal[x]) {
-+ /* Add missing non-level-zero tnode */
-+ tn->internal[x] = yaffs_get_tnode(dev);
-+ if (!tn->internal[x])
-+ return NULL;
-+ } else if (l == 1) {
-+ /* Looking from level 1 at level 0 */
-+ if (passed_tn) {
-+ /* If we already have one, release it */
-+ if (tn->internal[x])
-+ yaffs_free_tnode(dev,
-+ tn->internal[x]);
-+ tn->internal[x] = passed_tn;
-+
-+ } else if (!tn->internal[x]) {
-+ /* Don't have one, none passed in */
-+ tn->internal[x] = yaffs_get_tnode(dev);
-+ if (!tn->internal[x])
-+ return NULL;
-+ }
-+ }
-+
-+ tn = tn->internal[x];
-+ l--;
-+ }
-+ } else {
-+ /* top is level 0 */
-+ if (passed_tn) {
-+ memcpy(tn, passed_tn,
-+ (dev->tnode_width * YAFFS_NTNODES_LEVEL0) / 8);
-+ yaffs_free_tnode(dev, passed_tn);
-+ }
-+ }
-+
-+ return tn;
-+}
-+
-+static int yaffs_tags_match(const struct yaffs_ext_tags *tags, int obj_id,
-+ int chunk_obj)
-+{
-+ return (tags->chunk_id == chunk_obj &&
-+ tags->obj_id == obj_id &&
-+ !tags->is_deleted) ? 1 : 0;
-+
-+}
-+
-+static int yaffs_find_chunk_in_group(struct yaffs_dev *dev, int the_chunk,
-+ struct yaffs_ext_tags *tags, int obj_id,
-+ int inode_chunk)
-+{
-+ int j;
-+
-+ for (j = 0; the_chunk && j < dev->chunk_grp_size; j++) {
-+ if (yaffs_check_chunk_bit
-+ (dev, the_chunk / dev->param.chunks_per_block,
-+ the_chunk % dev->param.chunks_per_block)) {
-+
-+ if (dev->chunk_grp_size == 1)
-+ return the_chunk;
-+ else {
-+ yaffs_rd_chunk_tags_nand(dev, the_chunk, NULL,
-+ tags);
-+ if (yaffs_tags_match(tags,
-+ obj_id, inode_chunk)) {
-+ /* found it; */
-+ return the_chunk;
-+ }
-+ }
-+ }
-+ the_chunk++;
-+ }
-+ return -1;
-+}
-+
-+int yaffs_find_chunk_in_file(struct yaffs_obj *in, int inode_chunk,
-+ struct yaffs_ext_tags *tags)
-+{
-+ /*Get the Tnode, then get the level 0 offset chunk offset */
-+ struct yaffs_tnode *tn;
-+ int the_chunk = -1;
-+ struct yaffs_ext_tags local_tags;
-+ int ret_val = -1;
-+ struct yaffs_dev *dev = in->my_dev;
-+
-+ if (!tags) {
-+ /* Passed a NULL, so use our own tags space */
-+ tags = &local_tags;
-+ }
-+
-+ tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk);
-+
-+ if (!tn)
-+ return ret_val;
-+
-+ the_chunk = yaffs_get_group_base(dev, tn, inode_chunk);
-+
-+ ret_val = yaffs_find_chunk_in_group(dev, the_chunk, tags, in->obj_id,
-+ inode_chunk);
-+ return ret_val;
-+}
-+
-+static int yaffs_find_del_file_chunk(struct yaffs_obj *in, int inode_chunk,
-+ struct yaffs_ext_tags *tags)
-+{
-+ /* Get the Tnode, then get the level 0 offset chunk offset */
-+ struct yaffs_tnode *tn;
-+ int the_chunk = -1;
-+ struct yaffs_ext_tags local_tags;
-+ struct yaffs_dev *dev = in->my_dev;
-+ int ret_val = -1;
-+
-+ if (!tags) {
-+ /* Passed a NULL, so use our own tags space */
-+ tags = &local_tags;
-+ }
-+
-+ tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk);
-+
-+ if (!tn)
-+ return ret_val;
-+
-+ the_chunk = yaffs_get_group_base(dev, tn, inode_chunk);
-+
-+ ret_val = yaffs_find_chunk_in_group(dev, the_chunk, tags, in->obj_id,
-+ inode_chunk);
-+
-+ /* Delete the entry in the filestructure (if found) */
-+ if (ret_val != -1)
-+ yaffs_load_tnode_0(dev, tn, inode_chunk, 0);
-+
-+ return ret_val;
-+}
-+
-+int yaffs_put_chunk_in_file(struct yaffs_obj *in, int inode_chunk,
-+ int nand_chunk, int in_scan)
-+{
-+ /* NB in_scan is zero unless scanning.
-+ * For forward scanning, in_scan is > 0;
-+ * for backward scanning in_scan is < 0
-+ *
-+ * nand_chunk = 0 is a dummy insert to make sure the tnodes are there.
-+ */
-+
-+ struct yaffs_tnode *tn;
-+ struct yaffs_dev *dev = in->my_dev;
-+ int existing_cunk;
-+ struct yaffs_ext_tags existing_tags;
-+ struct yaffs_ext_tags new_tags;
-+ unsigned existing_serial, new_serial;
-+
-+ if (in->variant_type != YAFFS_OBJECT_TYPE_FILE) {
-+ /* Just ignore an attempt at putting a chunk into a non-file
-+ * during scanning.
-+ * If it is not during Scanning then something went wrong!
-+ */
-+ if (!in_scan) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs tragedy:attempt to put data chunk into a non-file"
-+ );
-+ BUG();
-+ }
-+
-+ yaffs_chunk_del(dev, nand_chunk, 1, __LINE__);
-+ return YAFFS_OK;
-+ }
-+
-+ tn = yaffs_add_find_tnode_0(dev,
-+ &in->variant.file_variant,
-+ inode_chunk, NULL);
-+ if (!tn)
-+ return YAFFS_FAIL;
-+
-+ if (!nand_chunk)
-+ /* Dummy insert, bail now */
-+ return YAFFS_OK;
-+
-+ existing_cunk = yaffs_get_group_base(dev, tn, inode_chunk);
-+
-+ if (in_scan != 0) {
-+ /* If we're scanning then we need to test for duplicates
-+ * NB This does not need to be efficient since it should only
-+ * happen when the power fails during a write, then only one
-+ * chunk should ever be affected.
-+ *
-+ * Correction for YAFFS2: This could happen quite a lot and we
-+ * need to think about efficiency! TODO
-+ * Update: For backward scanning we don't need to re-read tags
-+ * so this is quite cheap.
-+ */
-+
-+ if (existing_cunk > 0) {
-+ /* NB Right now existing chunk will not be real
-+ * chunk_id if the chunk group size > 1
-+ * thus we have to do a FindChunkInFile to get the
-+ * real chunk id.
-+ *
-+ * We have a duplicate now we need to decide which
-+ * one to use:
-+ *
-+ * Backwards scanning YAFFS2: The old one is what
-+ * we use, dump the new one.
-+ * YAFFS1: Get both sets of tags and compare serial
-+ * numbers.
-+ */
-+
-+ if (in_scan > 0) {
-+ /* Only do this for forward scanning */
-+ yaffs_rd_chunk_tags_nand(dev,
-+ nand_chunk,
-+ NULL, &new_tags);
-+
-+ /* Do a proper find */
-+ existing_cunk =
-+ yaffs_find_chunk_in_file(in, inode_chunk,
-+ &existing_tags);
-+ }
-+
-+ if (existing_cunk <= 0) {
-+ /*Hoosterman - how did this happen? */
-+
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs tragedy: existing chunk < 0 in scan"
-+ );
-+
-+ }
-+
-+ /* NB The deleted flags should be false, otherwise
-+ * the chunks will not be loaded during a scan
-+ */
-+
-+ if (in_scan > 0) {
-+ new_serial = new_tags.serial_number;
-+ existing_serial = existing_tags.serial_number;
-+ }
-+
-+ if ((in_scan > 0) &&
-+ (existing_cunk <= 0 ||
-+ ((existing_serial + 1) & 3) == new_serial)) {
-+ /* Forward scanning.
-+ * Use new
-+ * Delete the old one and drop through to
-+ * update the tnode
-+ */
-+ yaffs_chunk_del(dev, existing_cunk, 1,
-+ __LINE__);
-+ } else {
-+ /* Backward scanning or we want to use the
-+ * existing one
-+ * Delete the new one and return early so that
-+ * the tnode isn't changed
-+ */
-+ yaffs_chunk_del(dev, nand_chunk, 1, __LINE__);
-+ return YAFFS_OK;
-+ }
-+ }
-+
-+ }
-+
-+ if (existing_cunk == 0)
-+ in->n_data_chunks++;
-+
-+ yaffs_load_tnode_0(dev, tn, inode_chunk, nand_chunk);
-+
-+ return YAFFS_OK;
-+}
-+
-+static void yaffs_soft_del_chunk(struct yaffs_dev *dev, int chunk)
-+{
-+ struct yaffs_block_info *the_block;
-+ unsigned block_no;
-+
-+ yaffs_trace(YAFFS_TRACE_DELETION, "soft delete chunk %d", chunk);
-+
-+ block_no = chunk / dev->param.chunks_per_block;
-+ the_block = yaffs_get_block_info(dev, block_no);
-+ if (the_block) {
-+ the_block->soft_del_pages++;
-+ dev->n_free_chunks++;
-+ yaffs2_update_oldest_dirty_seq(dev, block_no, the_block);
-+ }
-+}
-+
-+/* SoftDeleteWorker scans backwards through the tnode tree and soft deletes all
-+ * the chunks in the file.
-+ * All soft deleting does is increment the block's softdelete count and pulls
-+ * the chunk out of the tnode.
-+ * Thus, essentially this is the same as DeleteWorker except that the chunks
-+ * are soft deleted.
-+ */
-+
-+static int yaffs_soft_del_worker(struct yaffs_obj *in, struct yaffs_tnode *tn,
-+ u32 level, int chunk_offset)
-+{
-+ int i;
-+ int the_chunk;
-+ int all_done = 1;
-+ struct yaffs_dev *dev = in->my_dev;
-+
-+ if (!tn)
-+ return 1;
-+
-+ if (level > 0) {
-+ for (i = YAFFS_NTNODES_INTERNAL - 1;
-+ all_done && i >= 0;
-+ i--) {
-+ if (tn->internal[i]) {
-+ all_done =
-+ yaffs_soft_del_worker(in,
-+ tn->internal[i],
-+ level - 1,
-+ (chunk_offset <<
-+ YAFFS_TNODES_INTERNAL_BITS)
-+ + i);
-+ if (all_done) {
-+ yaffs_free_tnode(dev,
-+ tn->internal[i]);
-+ tn->internal[i] = NULL;
-+ } else {
-+ /* Can this happen? */
-+ }
-+ }
-+ }
-+ return (all_done) ? 1 : 0;
-+ }
-+
-+ /* level 0 */
-+ for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) {
-+ the_chunk = yaffs_get_group_base(dev, tn, i);
-+ if (the_chunk) {
-+ yaffs_soft_del_chunk(dev, the_chunk);
-+ yaffs_load_tnode_0(dev, tn, i, 0);
-+ }
-+ }
-+ return 1;
-+}
-+
-+static void yaffs_remove_obj_from_dir(struct yaffs_obj *obj)
-+{
-+ struct yaffs_dev *dev = obj->my_dev;
-+ struct yaffs_obj *parent;
-+
-+ yaffs_verify_obj_in_dir(obj);
-+ parent = obj->parent;
-+
-+ yaffs_verify_dir(parent);
-+
-+ if (dev && dev->param.remove_obj_fn)
-+ dev->param.remove_obj_fn(obj);
-+
-+ list_del_init(&obj->siblings);
-+ obj->parent = NULL;
-+
-+ yaffs_verify_dir(parent);
-+}
-+
-+void yaffs_add_obj_to_dir(struct yaffs_obj *directory, struct yaffs_obj *obj)
-+{
-+ if (!directory) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "tragedy: Trying to add an object to a null pointer directory"
-+ );
-+ BUG();
-+ return;
-+ }
-+ if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "tragedy: Trying to add an object to a non-directory"
-+ );
-+ BUG();
-+ }
-+
-+ if (obj->siblings.prev == NULL) {
-+ /* Not initialised */
-+ BUG();
-+ }
-+
-+ yaffs_verify_dir(directory);
-+
-+ yaffs_remove_obj_from_dir(obj);
-+
-+ /* Now add it */
-+ list_add(&obj->siblings, &directory->variant.dir_variant.children);
-+ obj->parent = directory;
-+
-+ if (directory == obj->my_dev->unlinked_dir
-+ || directory == obj->my_dev->del_dir) {
-+ obj->unlinked = 1;
-+ obj->my_dev->n_unlinked_files++;
-+ obj->rename_allowed = 0;
-+ }
-+
-+ yaffs_verify_dir(directory);
-+ yaffs_verify_obj_in_dir(obj);
-+}
-+
-+static int yaffs_change_obj_name(struct yaffs_obj *obj,
-+ struct yaffs_obj *new_dir,
-+ const YCHAR *new_name, int force, int shadows)
-+{
-+ int unlink_op;
-+ int del_op;
-+ struct yaffs_obj *existing_target;
-+
-+ if (new_dir == NULL)
-+ new_dir = obj->parent; /* use the old directory */
-+
-+ if (new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "tragedy: yaffs_change_obj_name: new_dir is not a directory"
-+ );
-+ BUG();
-+ }
-+
-+ unlink_op = (new_dir == obj->my_dev->unlinked_dir);
-+ del_op = (new_dir == obj->my_dev->del_dir);
-+
-+ existing_target = yaffs_find_by_name(new_dir, new_name);
-+
-+ /* If the object is a file going into the unlinked directory,
-+ * then it is OK to just stuff it in since duplicate names are OK.
-+ * else only proceed if the new name does not exist and we're putting
-+ * it into a directory.
-+ */
-+ if (!(unlink_op || del_op || force ||
-+ shadows > 0 || !existing_target) ||
-+ new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
-+ return YAFFS_FAIL;
-+
-+ yaffs_set_obj_name(obj, new_name);
-+ obj->dirty = 1;
-+ yaffs_add_obj_to_dir(new_dir, obj);
-+
-+ if (unlink_op)
-+ obj->unlinked = 1;
-+
-+ /* If it is a deletion then we mark it as a shrink for gc */
-+ if (yaffs_update_oh(obj, new_name, 0, del_op, shadows, NULL) >= 0)
-+ return YAFFS_OK;
-+
-+ return YAFFS_FAIL;
-+}
-+
-+/*------------------------ Short Operations Cache ------------------------------
-+ * In many situations where there is no high level buffering a lot of
-+ * reads might be short sequential reads, and a lot of writes may be short
-+ * sequential writes. eg. scanning/writing a jpeg file.
-+ * In these cases, a short read/write cache can provide a huge perfomance
-+ * benefit with dumb-as-a-rock code.
-+ * In Linux, the page cache provides read buffering and the short op cache
-+ * provides write buffering.
-+ *
-+ * There are a small number (~10) of cache chunks per device so that we don't
-+ * need a very intelligent search.
-+ */
-+
-+static int yaffs_obj_cache_dirty(struct yaffs_obj *obj)
-+{
-+ struct yaffs_dev *dev = obj->my_dev;
-+ int i;
-+ struct yaffs_cache *cache;
-+ int n_caches = obj->my_dev->param.n_caches;
-+
-+ for (i = 0; i < n_caches; i++) {
-+ cache = &dev->cache[i];
-+ if (cache->object == obj && cache->dirty)
-+ return 1;
-+ }
-+
-+ return 0;
-+}
-+
-+static void yaffs_flush_file_cache(struct yaffs_obj *obj)
-+{
-+ struct yaffs_dev *dev = obj->my_dev;
-+ int lowest = -99; /* Stop compiler whining. */
-+ int i;
-+ struct yaffs_cache *cache;
-+ int chunk_written = 0;
-+ int n_caches = obj->my_dev->param.n_caches;
-+
-+ if (n_caches < 1)
-+ return;
-+ do {
-+ cache = NULL;
-+
-+ /* Find the lowest dirty chunk for this object */
-+ for (i = 0; i < n_caches; i++) {
-+ if (dev->cache[i].object == obj &&
-+ dev->cache[i].dirty) {
-+ if (!cache ||
-+ dev->cache[i].chunk_id < lowest) {
-+ cache = &dev->cache[i];
-+ lowest = cache->chunk_id;
-+ }
-+ }
-+ }
-+
-+ if (cache && !cache->locked) {
-+ /* Write it out and free it up */
-+ chunk_written =
-+ yaffs_wr_data_obj(cache->object,
-+ cache->chunk_id,
-+ cache->data,
-+ cache->n_bytes, 1);
-+ cache->dirty = 0;
-+ cache->object = NULL;
-+ }
-+ } while (cache && chunk_written > 0);
-+
-+ if (cache)
-+ /* Hoosterman, disk full while writing cache out. */
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs tragedy: no space during cache write");
-+}
-+
-+/*yaffs_flush_whole_cache(dev)
-+ *
-+ *
-+ */
-+
-+void yaffs_flush_whole_cache(struct yaffs_dev *dev)
-+{
-+ struct yaffs_obj *obj;
-+ int n_caches = dev->param.n_caches;
-+ int i;
-+
-+ /* Find a dirty object in the cache and flush it...
-+ * until there are no further dirty objects.
-+ */
-+ do {
-+ obj = NULL;
-+ for (i = 0; i < n_caches && !obj; i++) {
-+ if (dev->cache[i].object && dev->cache[i].dirty)
-+ obj = dev->cache[i].object;
-+ }
-+ if (obj)
-+ yaffs_flush_file_cache(obj);
-+ } while (obj);
-+
-+}
-+
-+/* Grab us a cache chunk for use.
-+ * First look for an empty one.
-+ * Then look for the least recently used non-dirty one.
-+ * Then look for the least recently used dirty one...., flush and look again.
-+ */
-+static struct yaffs_cache *yaffs_grab_chunk_worker(struct yaffs_dev *dev)
-+{
-+ int i;
-+
-+ if (dev->param.n_caches > 0) {
-+ for (i = 0; i < dev->param.n_caches; i++) {
-+ if (!dev->cache[i].object)
-+ return &dev->cache[i];
-+ }
-+ }
-+ return NULL;
-+}
-+
-+static struct yaffs_cache *yaffs_grab_chunk_cache(struct yaffs_dev *dev)
-+{
-+ struct yaffs_cache *cache;
-+ struct yaffs_obj *the_obj;
-+ int usage;
-+ int i;
-+ int pushout;
-+
-+ if (dev->param.n_caches < 1)
-+ return NULL;
-+
-+ /* Try find a non-dirty one... */
-+
-+ cache = yaffs_grab_chunk_worker(dev);
-+
-+ if (!cache) {
-+ /* They were all dirty, find the LRU object and flush
-+ * its cache, then find again.
-+ * NB what's here is not very accurate,
-+ * we actually flush the object with the LRU chunk.
-+ */
-+
-+ /* With locking we can't assume we can use entry zero,
-+ * Set the_obj to a valid pointer for Coverity. */
-+ the_obj = dev->cache[0].object;
-+ usage = -1;
-+ cache = NULL;
-+ pushout = -1;
-+
-+ for (i = 0; i < dev->param.n_caches; i++) {
-+ if (dev->cache[i].object &&
-+ !dev->cache[i].locked &&
-+ (dev->cache[i].last_use < usage ||
-+ !cache)) {
-+ usage = dev->cache[i].last_use;
-+ the_obj = dev->cache[i].object;
-+ cache = &dev->cache[i];
-+ pushout = i;
-+ }
-+ }
-+
-+ if (!cache || cache->dirty) {
-+ /* Flush and try again */
-+ yaffs_flush_file_cache(the_obj);
-+ cache = yaffs_grab_chunk_worker(dev);
-+ }
-+ }
-+ return cache;
-+}
-+
-+/* Find a cached chunk */
-+static struct yaffs_cache *yaffs_find_chunk_cache(const struct yaffs_obj *obj,
-+ int chunk_id)
-+{
-+ struct yaffs_dev *dev = obj->my_dev;
-+ int i;
-+
-+ if (dev->param.n_caches < 1)
-+ return NULL;
-+
-+ for (i = 0; i < dev->param.n_caches; i++) {
-+ if (dev->cache[i].object == obj &&
-+ dev->cache[i].chunk_id == chunk_id) {
-+ dev->cache_hits++;
-+
-+ return &dev->cache[i];
-+ }
-+ }
-+ return NULL;
-+}
-+
-+/* Mark the chunk for the least recently used algorithym */
-+static void yaffs_use_cache(struct yaffs_dev *dev, struct yaffs_cache *cache,
-+ int is_write)
-+{
-+ int i;
-+
-+ if (dev->param.n_caches < 1)
-+ return;
-+
-+ if (dev->cache_last_use < 0 ||
-+ dev->cache_last_use > 100000000) {
-+ /* Reset the cache usages */
-+ for (i = 1; i < dev->param.n_caches; i++)
-+ dev->cache[i].last_use = 0;
-+
-+ dev->cache_last_use = 0;
-+ }
-+ dev->cache_last_use++;
-+ cache->last_use = dev->cache_last_use;
-+
-+ if (is_write)
-+ cache->dirty = 1;
-+}
-+
-+/* Invalidate a single cache page.
-+ * Do this when a whole page gets written,
-+ * ie the short cache for this page is no longer valid.
-+ */
-+static void yaffs_invalidate_chunk_cache(struct yaffs_obj *object, int chunk_id)
-+{
-+ struct yaffs_cache *cache;
-+
-+ if (object->my_dev->param.n_caches > 0) {
-+ cache = yaffs_find_chunk_cache(object, chunk_id);
-+
-+ if (cache)
-+ cache->object = NULL;
-+ }
-+}
-+
-+/* Invalidate all the cache pages associated with this object
-+ * Do this whenever ther file is deleted or resized.
-+ */
-+static void yaffs_invalidate_whole_cache(struct yaffs_obj *in)
-+{
-+ int i;
-+ struct yaffs_dev *dev = in->my_dev;
-+
-+ if (dev->param.n_caches > 0) {
-+ /* Invalidate it. */
-+ for (i = 0; i < dev->param.n_caches; i++) {
-+ if (dev->cache[i].object == in)
-+ dev->cache[i].object = NULL;
-+ }
-+ }
-+}
-+
-+static void yaffs_unhash_obj(struct yaffs_obj *obj)
-+{
-+ int bucket;
-+ struct yaffs_dev *dev = obj->my_dev;
-+
-+ /* If it is still linked into the bucket list, free from the list */
-+ if (!list_empty(&obj->hash_link)) {
-+ list_del_init(&obj->hash_link);
-+ bucket = yaffs_hash_fn(obj->obj_id);
-+ dev->obj_bucket[bucket].count--;
-+ }
-+}
-+
-+/* FreeObject frees up a Object and puts it back on the free list */
-+static void yaffs_free_obj(struct yaffs_obj *obj)
-+{
-+ struct yaffs_dev *dev;
-+
-+ if (!obj) {
-+ BUG();
-+ return;
-+ }
-+ dev = obj->my_dev;
-+ yaffs_trace(YAFFS_TRACE_OS, "FreeObject %p inode %p",
-+ obj, obj->my_inode);
-+ if (obj->parent)
-+ BUG();
-+ if (!list_empty(&obj->siblings))
-+ BUG();
-+
-+ if (obj->my_inode) {
-+ /* We're still hooked up to a cached inode.
-+ * Don't delete now, but mark for later deletion
-+ */
-+ obj->defered_free = 1;
-+ return;
-+ }
-+
-+ yaffs_unhash_obj(obj);
-+
-+ yaffs_free_raw_obj(dev, obj);
-+ dev->n_obj--;
-+ dev->checkpoint_blocks_required = 0; /* force recalculation */
-+}
-+
-+void yaffs_handle_defered_free(struct yaffs_obj *obj)
-+{
-+ if (obj->defered_free)
-+ yaffs_free_obj(obj);
-+}
-+
-+static int yaffs_generic_obj_del(struct yaffs_obj *in)
-+{
-+ /* Iinvalidate the file's data in the cache, without flushing. */
-+ yaffs_invalidate_whole_cache(in);
-+
-+ if (in->my_dev->param.is_yaffs2 && in->parent != in->my_dev->del_dir) {
-+ /* Move to unlinked directory so we have a deletion record */
-+ yaffs_change_obj_name(in, in->my_dev->del_dir, _Y("deleted"), 0,
-+ 0);
-+ }
-+
-+ yaffs_remove_obj_from_dir(in);
-+ yaffs_chunk_del(in->my_dev, in->hdr_chunk, 1, __LINE__);
-+ in->hdr_chunk = 0;
-+
-+ yaffs_free_obj(in);
-+ return YAFFS_OK;
-+
-+}
-+
-+static void yaffs_soft_del_file(struct yaffs_obj *obj)
-+{
-+ if (!obj->deleted ||
-+ obj->variant_type != YAFFS_OBJECT_TYPE_FILE ||
-+ obj->soft_del)
-+ return;
-+
-+ if (obj->n_data_chunks <= 0) {
-+ /* Empty file with no duplicate object headers,
-+ * just delete it immediately */
-+ yaffs_free_tnode(obj->my_dev, obj->variant.file_variant.top);
-+ obj->variant.file_variant.top = NULL;
-+ yaffs_trace(YAFFS_TRACE_TRACING,
-+ "yaffs: Deleting empty file %d",
-+ obj->obj_id);
-+ yaffs_generic_obj_del(obj);
-+ } else {
-+ yaffs_soft_del_worker(obj,
-+ obj->variant.file_variant.top,
-+ obj->variant.
-+ file_variant.top_level, 0);
-+ obj->soft_del = 1;
-+ }
-+}
-+
-+/* Pruning removes any part of the file structure tree that is beyond the
-+ * bounds of the file (ie that does not point to chunks).
-+ *
-+ * A file should only get pruned when its size is reduced.
-+ *
-+ * Before pruning, the chunks must be pulled from the tree and the
-+ * level 0 tnode entries must be zeroed out.
-+ * Could also use this for file deletion, but that's probably better handled
-+ * by a special case.
-+ *
-+ * This function is recursive. For levels > 0 the function is called again on
-+ * any sub-tree. For level == 0 we just check if the sub-tree has data.
-+ * If there is no data in a subtree then it is pruned.
-+ */
-+
-+static struct yaffs_tnode *yaffs_prune_worker(struct yaffs_dev *dev,
-+ struct yaffs_tnode *tn, u32 level,
-+ int del0)
-+{
-+ int i;
-+ int has_data;
-+
-+ if (!tn)
-+ return tn;
-+
-+ has_data = 0;
-+
-+ if (level > 0) {
-+ for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) {
-+ if (tn->internal[i]) {
-+ tn->internal[i] =
-+ yaffs_prune_worker(dev,
-+ tn->internal[i],
-+ level - 1,
-+ (i == 0) ? del0 : 1);
-+ }
-+
-+ if (tn->internal[i])
-+ has_data++;
-+ }
-+ } else {
-+ int tnode_size_u32 = dev->tnode_size / sizeof(u32);
-+ u32 *map = (u32 *) tn;
-+
-+ for (i = 0; !has_data && i < tnode_size_u32; i++) {
-+ if (map[i])
-+ has_data++;
-+ }
-+ }
-+
-+ if (has_data == 0 && del0) {
-+ /* Free and return NULL */
-+ yaffs_free_tnode(dev, tn);
-+ tn = NULL;
-+ }
-+ return tn;
-+}
-+
-+static int yaffs_prune_tree(struct yaffs_dev *dev,
-+ struct yaffs_file_var *file_struct)
-+{
-+ int i;
-+ int has_data;
-+ int done = 0;
-+ struct yaffs_tnode *tn;
-+
-+ if (file_struct->top_level < 1)
-+ return YAFFS_OK;
-+
-+ file_struct->top =
-+ yaffs_prune_worker(dev, file_struct->top, file_struct->top_level, 0);
-+
-+ /* Now we have a tree with all the non-zero branches NULL but
-+ * the height is the same as it was.
-+ * Let's see if we can trim internal tnodes to shorten the tree.
-+ * We can do this if only the 0th element in the tnode is in use
-+ * (ie all the non-zero are NULL)
-+ */
-+
-+ while (file_struct->top_level && !done) {
-+ tn = file_struct->top;
-+
-+ has_data = 0;
-+ for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) {
-+ if (tn->internal[i])
-+ has_data++;
-+ }
-+
-+ if (!has_data) {
-+ file_struct->top = tn->internal[0];
-+ file_struct->top_level--;
-+ yaffs_free_tnode(dev, tn);
-+ } else {
-+ done = 1;
-+ }
-+ }
-+
-+ return YAFFS_OK;
-+}
-+
-+/*-------------------- End of File Structure functions.-------------------*/
-+
-+/* alloc_empty_obj gets us a clean Object.*/
-+static struct yaffs_obj *yaffs_alloc_empty_obj(struct yaffs_dev *dev)
-+{
-+ struct yaffs_obj *obj = yaffs_alloc_raw_obj(dev);
-+
-+ if (!obj)
-+ return obj;
-+
-+ dev->n_obj++;
-+
-+ /* Now sweeten it up... */
-+
-+ memset(obj, 0, sizeof(struct yaffs_obj));
-+ obj->being_created = 1;
-+
-+ obj->my_dev = dev;
-+ obj->hdr_chunk = 0;
-+ obj->variant_type = YAFFS_OBJECT_TYPE_UNKNOWN;
-+ INIT_LIST_HEAD(&(obj->hard_links));
-+ INIT_LIST_HEAD(&(obj->hash_link));
-+ INIT_LIST_HEAD(&obj->siblings);
-+
-+ /* Now make the directory sane */
-+ if (dev->root_dir) {
-+ obj->parent = dev->root_dir;
-+ list_add(&(obj->siblings),
-+ &dev->root_dir->variant.dir_variant.children);
-+ }
-+
-+ /* Add it to the lost and found directory.
-+ * NB Can't put root or lost-n-found in lost-n-found so
-+ * check if lost-n-found exists first
-+ */
-+ if (dev->lost_n_found)
-+ yaffs_add_obj_to_dir(dev->lost_n_found, obj);
-+
-+ obj->being_created = 0;
-+
-+ dev->checkpoint_blocks_required = 0; /* force recalculation */
-+
-+ return obj;
-+}
-+
-+static int yaffs_find_nice_bucket(struct yaffs_dev *dev)
-+{
-+ int i;
-+ int l = 999;
-+ int lowest = 999999;
-+
-+ /* Search for the shortest list or one that
-+ * isn't too long.
-+ */
-+
-+ for (i = 0; i < 10 && lowest > 4; i++) {
-+ dev->bucket_finder++;
-+ dev->bucket_finder %= YAFFS_NOBJECT_BUCKETS;
-+ if (dev->obj_bucket[dev->bucket_finder].count < lowest) {
-+ lowest = dev->obj_bucket[dev->bucket_finder].count;
-+ l = dev->bucket_finder;
-+ }
-+ }
-+
-+ return l;
-+}
-+
-+static int yaffs_new_obj_id(struct yaffs_dev *dev)
-+{
-+ int bucket = yaffs_find_nice_bucket(dev);
-+ int found = 0;
-+ struct list_head *i;
-+ u32 n = (u32) bucket;
-+
-+ /* Now find an object value that has not already been taken
-+ * by scanning the list.
-+ */
-+
-+ while (!found) {
-+ found = 1;
-+ n += YAFFS_NOBJECT_BUCKETS;
-+ if (1 || dev->obj_bucket[bucket].count > 0) {
-+ list_for_each(i, &dev->obj_bucket[bucket].list) {
-+ /* If there is already one in the list */
-+ if (i && list_entry(i, struct yaffs_obj,
-+ hash_link)->obj_id == n) {
-+ found = 0;
-+ }
-+ }
-+ }
-+ }
-+ return n;
-+}
-+
-+static void yaffs_hash_obj(struct yaffs_obj *in)
-+{
-+ int bucket = yaffs_hash_fn(in->obj_id);
-+ struct yaffs_dev *dev = in->my_dev;
-+
-+ list_add(&in->hash_link, &dev->obj_bucket[bucket].list);
-+ dev->obj_bucket[bucket].count++;
-+}
-+
-+struct yaffs_obj *yaffs_find_by_number(struct yaffs_dev *dev, u32 number)
-+{
-+ int bucket = yaffs_hash_fn(number);
-+ struct list_head *i;
-+ struct yaffs_obj *in;
-+
-+ list_for_each(i, &dev->obj_bucket[bucket].list) {
-+ /* Look if it is in the list */
-+ in = list_entry(i, struct yaffs_obj, hash_link);
-+ if (in->obj_id == number) {
-+ /* Don't show if it is defered free */
-+ if (in->defered_free)
-+ return NULL;
-+ return in;
-+ }
-+ }
-+
-+ return NULL;
-+}
-+
-+static struct yaffs_obj *yaffs_new_obj(struct yaffs_dev *dev, int number,
-+ enum yaffs_obj_type type)
-+{
-+ struct yaffs_obj *the_obj = NULL;
-+ struct yaffs_tnode *tn = NULL;
-+
-+ if (number < 0)
-+ number = yaffs_new_obj_id(dev);
-+
-+ if (type == YAFFS_OBJECT_TYPE_FILE) {
-+ tn = yaffs_get_tnode(dev);
-+ if (!tn)
-+ return NULL;
-+ }
-+
-+ the_obj = yaffs_alloc_empty_obj(dev);
-+ if (!the_obj) {
-+ if (tn)
-+ yaffs_free_tnode(dev, tn);
-+ return NULL;
-+ }
-+
-+ the_obj->fake = 0;
-+ the_obj->rename_allowed = 1;
-+ the_obj->unlink_allowed = 1;
-+ the_obj->obj_id = number;
-+ yaffs_hash_obj(the_obj);
-+ the_obj->variant_type = type;
-+ yaffs_load_current_time(the_obj, 1, 1);
-+
-+ switch (type) {
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ the_obj->variant.file_variant.file_size = 0;
-+ the_obj->variant.file_variant.scanned_size = 0;
-+ the_obj->variant.file_variant.shrink_size =
-+ yaffs_max_file_size(dev);
-+ the_obj->variant.file_variant.top_level = 0;
-+ the_obj->variant.file_variant.top = tn;
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ INIT_LIST_HEAD(&the_obj->variant.dir_variant.children);
-+ INIT_LIST_HEAD(&the_obj->variant.dir_variant.dirty);
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ /* No action required */
-+ break;
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ /* todo this should not happen */
-+ break;
-+ }
-+ return the_obj;
-+}
-+
-+static struct yaffs_obj *yaffs_create_fake_dir(struct yaffs_dev *dev,
-+ int number, u32 mode)
-+{
-+
-+ struct yaffs_obj *obj =
-+ yaffs_new_obj(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY);
-+
-+ if (!obj)
-+ return NULL;
-+
-+ obj->fake = 1; /* it is fake so it might not use NAND */
-+ obj->rename_allowed = 0;
-+ obj->unlink_allowed = 0;
-+ obj->deleted = 0;
-+ obj->unlinked = 0;
-+ obj->yst_mode = mode;
-+ obj->my_dev = dev;
-+ obj->hdr_chunk = 0; /* Not a valid chunk. */
-+ return obj;
-+
-+}
-+
-+
-+static void yaffs_init_tnodes_and_objs(struct yaffs_dev *dev)
-+{
-+ int i;
-+
-+ dev->n_obj = 0;
-+ dev->n_tnodes = 0;
-+ yaffs_init_raw_tnodes_and_objs(dev);
-+
-+ for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
-+ INIT_LIST_HEAD(&dev->obj_bucket[i].list);
-+ dev->obj_bucket[i].count = 0;
-+ }
-+}
-+
-+struct yaffs_obj *yaffs_find_or_create_by_number(struct yaffs_dev *dev,
-+ int number,
-+ enum yaffs_obj_type type)
-+{
-+ struct yaffs_obj *the_obj = NULL;
-+
-+ if (number > 0)
-+ the_obj = yaffs_find_by_number(dev, number);
-+
-+ if (!the_obj)
-+ the_obj = yaffs_new_obj(dev, number, type);
-+
-+ return the_obj;
-+
-+}
-+
-+YCHAR *yaffs_clone_str(const YCHAR *str)
-+{
-+ YCHAR *new_str = NULL;
-+ int len;
-+
-+ if (!str)
-+ str = _Y("");
-+
-+ len = strnlen(str, YAFFS_MAX_ALIAS_LENGTH);
-+ new_str = kmalloc((len + 1) * sizeof(YCHAR), GFP_NOFS);
-+ if (new_str) {
-+ strncpy(new_str, str, len);
-+ new_str[len] = 0;
-+ }
-+ return new_str;
-+
-+}
-+/*
-+ *yaffs_update_parent() handles fixing a directories mtime and ctime when a new
-+ * link (ie. name) is created or deleted in the directory.
-+ *
-+ * ie.
-+ * create dir/a : update dir's mtime/ctime
-+ * rm dir/a: update dir's mtime/ctime
-+ * modify dir/a: don't update dir's mtimme/ctime
-+ *
-+ * This can be handled immediately or defered. Defering helps reduce the number
-+ * of updates when many files in a directory are changed within a brief period.
-+ *
-+ * If the directory updating is defered then yaffs_update_dirty_dirs must be
-+ * called periodically.
-+ */
-+
-+static void yaffs_update_parent(struct yaffs_obj *obj)
-+{
-+ struct yaffs_dev *dev;
-+
-+ if (!obj)
-+ return;
-+ dev = obj->my_dev;
-+ obj->dirty = 1;
-+ yaffs_load_current_time(obj, 0, 1);
-+ if (dev->param.defered_dir_update) {
-+ struct list_head *link = &obj->variant.dir_variant.dirty;
-+
-+ if (list_empty(link)) {
-+ list_add(link, &dev->dirty_dirs);
-+ yaffs_trace(YAFFS_TRACE_BACKGROUND,
-+ "Added object %d to dirty directories",
-+ obj->obj_id);
-+ }
-+
-+ } else {
-+ yaffs_update_oh(obj, NULL, 0, 0, 0, NULL);
-+ }
-+}
-+
-+void yaffs_update_dirty_dirs(struct yaffs_dev *dev)
-+{
-+ struct list_head *link;
-+ struct yaffs_obj *obj;
-+ struct yaffs_dir_var *d_s;
-+ union yaffs_obj_var *o_v;
-+
-+ yaffs_trace(YAFFS_TRACE_BACKGROUND, "Update dirty directories");
-+
-+ while (!list_empty(&dev->dirty_dirs)) {
-+ link = dev->dirty_dirs.next;
-+ list_del_init(link);
-+
-+ d_s = list_entry(link, struct yaffs_dir_var, dirty);
-+ o_v = list_entry(d_s, union yaffs_obj_var, dir_variant);
-+ obj = list_entry(o_v, struct yaffs_obj, variant);
-+
-+ yaffs_trace(YAFFS_TRACE_BACKGROUND, "Update directory %d",
-+ obj->obj_id);
-+
-+ if (obj->dirty)
-+ yaffs_update_oh(obj, NULL, 0, 0, 0, NULL);
-+ }
-+}
-+
-+/*
-+ * Mknod (create) a new object.
-+ * equiv_obj only has meaning for a hard link;
-+ * alias_str only has meaning for a symlink.
-+ * rdev only has meaning for devices (a subset of special objects)
-+ */
-+
-+static struct yaffs_obj *yaffs_create_obj(enum yaffs_obj_type type,
-+ struct yaffs_obj *parent,
-+ const YCHAR *name,
-+ u32 mode,
-+ u32 uid,
-+ u32 gid,
-+ struct yaffs_obj *equiv_obj,
-+ const YCHAR *alias_str, u32 rdev)
-+{
-+ struct yaffs_obj *in;
-+ YCHAR *str = NULL;
-+ struct yaffs_dev *dev = parent->my_dev;
-+
-+ /* Check if the entry exists.
-+ * If it does then fail the call since we don't want a dup. */
-+ if (yaffs_find_by_name(parent, name))
-+ return NULL;
-+
-+ if (type == YAFFS_OBJECT_TYPE_SYMLINK) {
-+ str = yaffs_clone_str(alias_str);
-+ if (!str)
-+ return NULL;
-+ }
-+
-+ in = yaffs_new_obj(dev, -1, type);
-+
-+ if (!in) {
-+ kfree(str);
-+ return NULL;
-+ }
-+
-+ in->hdr_chunk = 0;
-+ in->valid = 1;
-+ in->variant_type = type;
-+
-+ in->yst_mode = mode;
-+
-+ yaffs_attribs_init(in, gid, uid, rdev);
-+
-+ in->n_data_chunks = 0;
-+
-+ yaffs_set_obj_name(in, name);
-+ in->dirty = 1;
-+
-+ yaffs_add_obj_to_dir(parent, in);
-+
-+ in->my_dev = parent->my_dev;
-+
-+ switch (type) {
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ in->variant.symlink_variant.alias = str;
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ in->variant.hardlink_variant.equiv_obj = equiv_obj;
-+ in->variant.hardlink_variant.equiv_id = equiv_obj->obj_id;
-+ list_add(&in->hard_links, &equiv_obj->hard_links);
-+ break;
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ /* do nothing */
-+ break;
-+ }
-+
-+ if (yaffs_update_oh(in, name, 0, 0, 0, NULL) < 0) {
-+ /* Could not create the object header, fail */
-+ yaffs_del_obj(in);
-+ in = NULL;
-+ }
-+
-+ if (in)
-+ yaffs_update_parent(parent);
-+
-+ return in;
-+}
-+
-+struct yaffs_obj *yaffs_create_file(struct yaffs_obj *parent,
-+ const YCHAR *name, u32 mode, u32 uid,
-+ u32 gid)
-+{
-+ return yaffs_create_obj(YAFFS_OBJECT_TYPE_FILE, parent, name, mode,
-+ uid, gid, NULL, NULL, 0);
-+}
-+
-+struct yaffs_obj *yaffs_create_dir(struct yaffs_obj *parent, const YCHAR *name,
-+ u32 mode, u32 uid, u32 gid)
-+{
-+ return yaffs_create_obj(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name,
-+ mode, uid, gid, NULL, NULL, 0);
-+}
-+
-+struct yaffs_obj *yaffs_create_special(struct yaffs_obj *parent,
-+ const YCHAR *name, u32 mode, u32 uid,
-+ u32 gid, u32 rdev)
-+{
-+ return yaffs_create_obj(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode,
-+ uid, gid, NULL, NULL, rdev);
-+}
-+
-+struct yaffs_obj *yaffs_create_symlink(struct yaffs_obj *parent,
-+ const YCHAR *name, u32 mode, u32 uid,
-+ u32 gid, const YCHAR *alias)
-+{
-+ return yaffs_create_obj(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode,
-+ uid, gid, NULL, alias, 0);
-+}
-+
-+/* yaffs_link_obj returns the object id of the equivalent object.*/
-+struct yaffs_obj *yaffs_link_obj(struct yaffs_obj *parent, const YCHAR * name,
-+ struct yaffs_obj *equiv_obj)
-+{
-+ /* Get the real object in case we were fed a hard link obj */
-+ equiv_obj = yaffs_get_equivalent_obj(equiv_obj);
-+
-+ if (yaffs_create_obj(YAFFS_OBJECT_TYPE_HARDLINK,
-+ parent, name, 0, 0, 0,
-+ equiv_obj, NULL, 0))
-+ return equiv_obj;
-+
-+ return NULL;
-+
-+}
-+
-+
-+
-+/*---------------------- Block Management and Page Allocation -------------*/
-+
-+static void yaffs_deinit_blocks(struct yaffs_dev *dev)
-+{
-+ if (dev->block_info_alt && dev->block_info)
-+ vfree(dev->block_info);
-+ else
-+ kfree(dev->block_info);
-+
-+ dev->block_info_alt = 0;
-+
-+ dev->block_info = NULL;
-+
-+ if (dev->chunk_bits_alt && dev->chunk_bits)
-+ vfree(dev->chunk_bits);
-+ else
-+ kfree(dev->chunk_bits);
-+ dev->chunk_bits_alt = 0;
-+ dev->chunk_bits = NULL;
-+}
-+
-+static int yaffs_init_blocks(struct yaffs_dev *dev)
-+{
-+ int n_blocks = dev->internal_end_block - dev->internal_start_block + 1;
-+
-+ dev->block_info = NULL;
-+ dev->chunk_bits = NULL;
-+ dev->alloc_block = -1; /* force it to get a new one */
-+
-+ /* If the first allocation strategy fails, thry the alternate one */
-+ dev->block_info =
-+ kmalloc(n_blocks * sizeof(struct yaffs_block_info), GFP_NOFS);
-+ if (!dev->block_info) {
-+ dev->block_info =
-+ vmalloc(n_blocks * sizeof(struct yaffs_block_info));
-+ dev->block_info_alt = 1;
-+ } else {
-+ dev->block_info_alt = 0;
-+ }
-+
-+ if (!dev->block_info)
-+ goto alloc_error;
-+
-+ /* Set up dynamic blockinfo stuff. Round up bytes. */
-+ dev->chunk_bit_stride = (dev->param.chunks_per_block + 7) / 8;
-+ dev->chunk_bits =
-+ kmalloc(dev->chunk_bit_stride * n_blocks, GFP_NOFS);
-+ if (!dev->chunk_bits) {
-+ dev->chunk_bits =
-+ vmalloc(dev->chunk_bit_stride * n_blocks);
-+ dev->chunk_bits_alt = 1;
-+ } else {
-+ dev->chunk_bits_alt = 0;
-+ }
-+ if (!dev->chunk_bits)
-+ goto alloc_error;
-+
-+
-+ memset(dev->block_info, 0, n_blocks * sizeof(struct yaffs_block_info));
-+ memset(dev->chunk_bits, 0, dev->chunk_bit_stride * n_blocks);
-+ return YAFFS_OK;
-+
-+alloc_error:
-+ yaffs_deinit_blocks(dev);
-+ return YAFFS_FAIL;
-+}
-+
-+
-+void yaffs_block_became_dirty(struct yaffs_dev *dev, int block_no)
-+{
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, block_no);
-+ int erased_ok = 0;
-+ int i;
-+
-+ /* If the block is still healthy erase it and mark as clean.
-+ * If the block has had a data failure, then retire it.
-+ */
-+
-+ yaffs_trace(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE,
-+ "yaffs_block_became_dirty block %d state %d %s",
-+ block_no, bi->block_state,
-+ (bi->needs_retiring) ? "needs retiring" : "");
-+
-+ yaffs2_clear_oldest_dirty_seq(dev, bi);
-+
-+ bi->block_state = YAFFS_BLOCK_STATE_DIRTY;
-+
-+ /* If this is the block being garbage collected then stop gc'ing */
-+ if (block_no == dev->gc_block)
-+ dev->gc_block = 0;
-+
-+ /* If this block is currently the best candidate for gc
-+ * then drop as a candidate */
-+ if (block_no == dev->gc_dirtiest) {
-+ dev->gc_dirtiest = 0;
-+ dev->gc_pages_in_use = 0;
-+ }
-+
-+ if (!bi->needs_retiring) {
-+ yaffs2_checkpt_invalidate(dev);
-+ erased_ok = yaffs_erase_block(dev, block_no);
-+ if (!erased_ok) {
-+ dev->n_erase_failures++;
-+ yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
-+ "**>> Erasure failed %d", block_no);
-+ }
-+ }
-+
-+ /* Verify erasure if needed */
-+ if (erased_ok &&
-+ ((yaffs_trace_mask & YAFFS_TRACE_ERASE) ||
-+ !yaffs_skip_verification(dev))) {
-+ for (i = 0; i < dev->param.chunks_per_block; i++) {
-+ if (!yaffs_check_chunk_erased(dev,
-+ block_no * dev->param.chunks_per_block + i)) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ ">>Block %d erasure supposedly OK, but chunk %d not erased",
-+ block_no, i);
-+ }
-+ }
-+ }
-+
-+ if (!erased_ok) {
-+ /* We lost a block of free space */
-+ dev->n_free_chunks -= dev->param.chunks_per_block;
-+ yaffs_retire_block(dev, block_no);
-+ yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
-+ "**>> Block %d retired", block_no);
-+ return;
-+ }
-+
-+ /* Clean it up... */
-+ bi->block_state = YAFFS_BLOCK_STATE_EMPTY;
-+ bi->seq_number = 0;
-+ dev->n_erased_blocks++;
-+ bi->pages_in_use = 0;
-+ bi->soft_del_pages = 0;
-+ bi->has_shrink_hdr = 0;
-+ bi->skip_erased_check = 1; /* Clean, so no need to check */
-+ bi->gc_prioritise = 0;
-+ bi->has_summary = 0;
-+
-+ yaffs_clear_chunk_bits(dev, block_no);
-+
-+ yaffs_trace(YAFFS_TRACE_ERASE, "Erased block %d", block_no);
-+}
-+
-+static inline int yaffs_gc_process_chunk(struct yaffs_dev *dev,
-+ struct yaffs_block_info *bi,
-+ int old_chunk, u8 *buffer)
-+{
-+ int new_chunk;
-+ int mark_flash = 1;
-+ struct yaffs_ext_tags tags;
-+ struct yaffs_obj *object;
-+ int matching_chunk;
-+ int ret_val = YAFFS_OK;
-+
-+ memset(&tags, 0, sizeof(tags));
-+ yaffs_rd_chunk_tags_nand(dev, old_chunk,
-+ buffer, &tags);
-+ object = yaffs_find_by_number(dev, tags.obj_id);
-+
-+ yaffs_trace(YAFFS_TRACE_GC_DETAIL,
-+ "Collecting chunk in block %d, %d %d %d ",
-+ dev->gc_chunk, tags.obj_id,
-+ tags.chunk_id, tags.n_bytes);
-+
-+ if (object && !yaffs_skip_verification(dev)) {
-+ if (tags.chunk_id == 0)
-+ matching_chunk =
-+ object->hdr_chunk;
-+ else if (object->soft_del)
-+ /* Defeat the test */
-+ matching_chunk = old_chunk;
-+ else
-+ matching_chunk =
-+ yaffs_find_chunk_in_file
-+ (object, tags.chunk_id,
-+ NULL);
-+
-+ if (old_chunk != matching_chunk)
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "gc: page in gc mismatch: %d %d %d %d",
-+ old_chunk,
-+ matching_chunk,
-+ tags.obj_id,
-+ tags.chunk_id);
-+ }
-+
-+ if (!object) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "page %d in gc has no object: %d %d %d ",
-+ old_chunk,
-+ tags.obj_id, tags.chunk_id,
-+ tags.n_bytes);
-+ }
-+
-+ if (object &&
-+ object->deleted &&
-+ object->soft_del && tags.chunk_id != 0) {
-+ /* Data chunk in a soft deleted file,
-+ * throw it away.
-+ * It's a soft deleted data chunk,
-+ * No need to copy this, just forget
-+ * about it and fix up the object.
-+ */
-+
-+ /* Free chunks already includes
-+ * softdeleted chunks, how ever this
-+ * chunk is going to soon be really
-+ * deleted which will increment free
-+ * chunks. We have to decrement free
-+ * chunks so this works out properly.
-+ */
-+ dev->n_free_chunks--;
-+ bi->soft_del_pages--;
-+
-+ object->n_data_chunks--;
-+ if (object->n_data_chunks <= 0) {
-+ /* remeber to clean up obj */
-+ dev->gc_cleanup_list[dev->n_clean_ups] = tags.obj_id;
-+ dev->n_clean_ups++;
-+ }
-+ mark_flash = 0;
-+ } else if (object) {
-+ /* It's either a data chunk in a live
-+ * file or an ObjectHeader, so we're
-+ * interested in it.
-+ * NB Need to keep the ObjectHeaders of
-+ * deleted files until the whole file
-+ * has been deleted off
-+ */
-+ tags.serial_number++;
-+ dev->n_gc_copies++;
-+
-+ if (tags.chunk_id == 0) {
-+ /* It is an object Id,
-+ * We need to nuke the
-+ * shrinkheader flags since its
-+ * work is done.
-+ * Also need to clean up
-+ * shadowing.
-+ */
-+ struct yaffs_obj_hdr *oh;
-+ oh = (struct yaffs_obj_hdr *) buffer;
-+
-+ oh->is_shrink = 0;
-+ tags.extra_is_shrink = 0;
-+ oh->shadows_obj = 0;
-+ oh->inband_shadowed_obj_id = 0;
-+ tags.extra_shadows = 0;
-+
-+ /* Update file size */
-+ if (object->variant_type == YAFFS_OBJECT_TYPE_FILE) {
-+ yaffs_oh_size_load(oh,
-+ object->variant.file_variant.file_size);
-+ tags.extra_file_size =
-+ object->variant.file_variant.file_size;
-+ }
-+
-+ yaffs_verify_oh(object, oh, &tags, 1);
-+ new_chunk =
-+ yaffs_write_new_chunk(dev, (u8 *) oh, &tags, 1);
-+ } else {
-+ new_chunk =
-+ yaffs_write_new_chunk(dev, buffer, &tags, 1);
-+ }
-+
-+ if (new_chunk < 0) {
-+ ret_val = YAFFS_FAIL;
-+ } else {
-+
-+ /* Now fix up the Tnodes etc. */
-+
-+ if (tags.chunk_id == 0) {
-+ /* It's a header */
-+ object->hdr_chunk = new_chunk;
-+ object->serial = tags.serial_number;
-+ } else {
-+ /* It's a data chunk */
-+ yaffs_put_chunk_in_file(object, tags.chunk_id,
-+ new_chunk, 0);
-+ }
-+ }
-+ }
-+ if (ret_val == YAFFS_OK)
-+ yaffs_chunk_del(dev, old_chunk, mark_flash, __LINE__);
-+ return ret_val;
-+}
-+
-+static int yaffs_gc_block(struct yaffs_dev *dev, int block, int whole_block)
-+{
-+ int old_chunk;
-+ int ret_val = YAFFS_OK;
-+ int i;
-+ int is_checkpt_block;
-+ int max_copies;
-+ int chunks_before = yaffs_get_erased_chunks(dev);
-+ int chunks_after;
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, block);
-+
-+ is_checkpt_block = (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT);
-+
-+ yaffs_trace(YAFFS_TRACE_TRACING,
-+ "Collecting block %d, in use %d, shrink %d, whole_block %d",
-+ block, bi->pages_in_use, bi->has_shrink_hdr,
-+ whole_block);
-+
-+ /*yaffs_verify_free_chunks(dev); */
-+
-+ if (bi->block_state == YAFFS_BLOCK_STATE_FULL)
-+ bi->block_state = YAFFS_BLOCK_STATE_COLLECTING;
-+
-+ bi->has_shrink_hdr = 0; /* clear the flag so that the block can erase */
-+
-+ dev->gc_disable = 1;
-+
-+ yaffs_summary_gc(dev, block);
-+
-+ if (is_checkpt_block || !yaffs_still_some_chunks(dev, block)) {
-+ yaffs_trace(YAFFS_TRACE_TRACING,
-+ "Collecting block %d that has no chunks in use",
-+ block);
-+ yaffs_block_became_dirty(dev, block);
-+ } else {
-+
-+ u8 *buffer = yaffs_get_temp_buffer(dev);
-+
-+ yaffs_verify_blk(dev, bi, block);
-+
-+ max_copies = (whole_block) ? dev->param.chunks_per_block : 5;
-+ old_chunk = block * dev->param.chunks_per_block + dev->gc_chunk;
-+
-+ for (/* init already done */ ;
-+ ret_val == YAFFS_OK &&
-+ dev->gc_chunk < dev->param.chunks_per_block &&
-+ (bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) &&
-+ max_copies > 0;
-+ dev->gc_chunk++, old_chunk++) {
-+ if (yaffs_check_chunk_bit(dev, block, dev->gc_chunk)) {
-+ /* Page is in use and might need to be copied */
-+ max_copies--;
-+ ret_val = yaffs_gc_process_chunk(dev, bi,
-+ old_chunk, buffer);
-+ }
-+ }
-+ yaffs_release_temp_buffer(dev, buffer);
-+ }
-+
-+ yaffs_verify_collected_blk(dev, bi, block);
-+
-+ if (bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) {
-+ /*
-+ * The gc did not complete. Set block state back to FULL
-+ * because checkpointing does not restore gc.
-+ */
-+ bi->block_state = YAFFS_BLOCK_STATE_FULL;
-+ } else {
-+ /* The gc completed. */
-+ /* Do any required cleanups */
-+ for (i = 0; i < dev->n_clean_ups; i++) {
-+ /* Time to delete the file too */
-+ struct yaffs_obj *object =
-+ yaffs_find_by_number(dev, dev->gc_cleanup_list[i]);
-+ if (object) {
-+ yaffs_free_tnode(dev,
-+ object->variant.file_variant.top);
-+ object->variant.file_variant.top = NULL;
-+ yaffs_trace(YAFFS_TRACE_GC,
-+ "yaffs: About to finally delete object %d",
-+ object->obj_id);
-+ yaffs_generic_obj_del(object);
-+ object->my_dev->n_deleted_files--;
-+ }
-+
-+ }
-+ chunks_after = yaffs_get_erased_chunks(dev);
-+ if (chunks_before >= chunks_after)
-+ yaffs_trace(YAFFS_TRACE_GC,
-+ "gc did not increase free chunks before %d after %d",
-+ chunks_before, chunks_after);
-+ dev->gc_block = 0;
-+ dev->gc_chunk = 0;
-+ dev->n_clean_ups = 0;
-+ }
-+
-+ dev->gc_disable = 0;
-+
-+ return ret_val;
-+}
-+
-+/*
-+ * find_gc_block() selects the dirtiest block (or close enough)
-+ * for garbage collection.
-+ */
-+
-+static unsigned yaffs_find_gc_block(struct yaffs_dev *dev,
-+ int aggressive, int background)
-+{
-+ int i;
-+ int iterations;
-+ unsigned selected = 0;
-+ int prioritised = 0;
-+ int prioritised_exist = 0;
-+ struct yaffs_block_info *bi;
-+ int threshold;
-+
-+ /* First let's see if we need to grab a prioritised block */
-+ if (dev->has_pending_prioritised_gc && !aggressive) {
-+ dev->gc_dirtiest = 0;
-+ bi = dev->block_info;
-+ for (i = dev->internal_start_block;
-+ i <= dev->internal_end_block && !selected; i++) {
-+
-+ if (bi->gc_prioritise) {
-+ prioritised_exist = 1;
-+ if (bi->block_state == YAFFS_BLOCK_STATE_FULL &&
-+ yaffs_block_ok_for_gc(dev, bi)) {
-+ selected = i;
-+ prioritised = 1;
-+ }
-+ }
-+ bi++;
-+ }
-+
-+ /*
-+ * If there is a prioritised block and none was selected then
-+ * this happened because there is at least one old dirty block
-+ * gumming up the works. Let's gc the oldest dirty block.
-+ */
-+
-+ if (prioritised_exist &&
-+ !selected && dev->oldest_dirty_block > 0)
-+ selected = dev->oldest_dirty_block;
-+
-+ if (!prioritised_exist) /* None found, so we can clear this */
-+ dev->has_pending_prioritised_gc = 0;
-+ }
-+
-+ /* If we're doing aggressive GC then we are happy to take a less-dirty
-+ * block, and search harder.
-+ * else (leasurely gc), then we only bother to do this if the
-+ * block has only a few pages in use.
-+ */
-+
-+ if (!selected) {
-+ int pages_used;
-+ int n_blocks =
-+ dev->internal_end_block - dev->internal_start_block + 1;
-+ if (aggressive) {
-+ threshold = dev->param.chunks_per_block;
-+ iterations = n_blocks;
-+ } else {
-+ int max_threshold;
-+
-+ if (background)
-+ max_threshold = dev->param.chunks_per_block / 2;
-+ else
-+ max_threshold = dev->param.chunks_per_block / 8;
-+
-+ if (max_threshold < YAFFS_GC_PASSIVE_THRESHOLD)
-+ max_threshold = YAFFS_GC_PASSIVE_THRESHOLD;
-+
-+ threshold = background ? (dev->gc_not_done + 2) * 2 : 0;
-+ if (threshold < YAFFS_GC_PASSIVE_THRESHOLD)
-+ threshold = YAFFS_GC_PASSIVE_THRESHOLD;
-+ if (threshold > max_threshold)
-+ threshold = max_threshold;
-+
-+ iterations = n_blocks / 16 + 1;
-+ if (iterations > 100)
-+ iterations = 100;
-+ }
-+
-+ for (i = 0;
-+ i < iterations &&
-+ (dev->gc_dirtiest < 1 ||
-+ dev->gc_pages_in_use > YAFFS_GC_GOOD_ENOUGH);
-+ i++) {
-+ dev->gc_block_finder++;
-+ if (dev->gc_block_finder < dev->internal_start_block ||
-+ dev->gc_block_finder > dev->internal_end_block)
-+ dev->gc_block_finder =
-+ dev->internal_start_block;
-+
-+ bi = yaffs_get_block_info(dev, dev->gc_block_finder);
-+
-+ pages_used = bi->pages_in_use - bi->soft_del_pages;
-+
-+ if (bi->block_state == YAFFS_BLOCK_STATE_FULL &&
-+ pages_used < dev->param.chunks_per_block &&
-+ (dev->gc_dirtiest < 1 ||
-+ pages_used < dev->gc_pages_in_use) &&
-+ yaffs_block_ok_for_gc(dev, bi)) {
-+ dev->gc_dirtiest = dev->gc_block_finder;
-+ dev->gc_pages_in_use = pages_used;
-+ }
-+ }
-+
-+ if (dev->gc_dirtiest > 0 && dev->gc_pages_in_use <= threshold)
-+ selected = dev->gc_dirtiest;
-+ }
-+
-+ /*
-+ * If nothing has been selected for a while, try the oldest dirty
-+ * because that's gumming up the works.
-+ */
-+
-+ if (!selected && dev->param.is_yaffs2 &&
-+ dev->gc_not_done >= (background ? 10 : 20)) {
-+ yaffs2_find_oldest_dirty_seq(dev);
-+ if (dev->oldest_dirty_block > 0) {
-+ selected = dev->oldest_dirty_block;
-+ dev->gc_dirtiest = selected;
-+ dev->oldest_dirty_gc_count++;
-+ bi = yaffs_get_block_info(dev, selected);
-+ dev->gc_pages_in_use =
-+ bi->pages_in_use - bi->soft_del_pages;
-+ } else {
-+ dev->gc_not_done = 0;
-+ }
-+ }
-+
-+ if (selected) {
-+ yaffs_trace(YAFFS_TRACE_GC,
-+ "GC Selected block %d with %d free, prioritised:%d",
-+ selected,
-+ dev->param.chunks_per_block - dev->gc_pages_in_use,
-+ prioritised);
-+
-+ dev->n_gc_blocks++;
-+ if (background)
-+ dev->bg_gcs++;
-+
-+ dev->gc_dirtiest = 0;
-+ dev->gc_pages_in_use = 0;
-+ dev->gc_not_done = 0;
-+ if (dev->refresh_skip > 0)
-+ dev->refresh_skip--;
-+ } else {
-+ dev->gc_not_done++;
-+ yaffs_trace(YAFFS_TRACE_GC,
-+ "GC none: finder %d skip %d threshold %d dirtiest %d using %d oldest %d%s",
-+ dev->gc_block_finder, dev->gc_not_done, threshold,
-+ dev->gc_dirtiest, dev->gc_pages_in_use,
-+ dev->oldest_dirty_block, background ? " bg" : "");
-+ }
-+
-+ return selected;
-+}
-+
-+/* New garbage collector
-+ * If we're very low on erased blocks then we do aggressive garbage collection
-+ * otherwise we do "leasurely" garbage collection.
-+ * Aggressive gc looks further (whole array) and will accept less dirty blocks.
-+ * Passive gc only inspects smaller areas and only accepts more dirty blocks.
-+ *
-+ * The idea is to help clear out space in a more spread-out manner.
-+ * Dunno if it really does anything useful.
-+ */
-+static int yaffs_check_gc(struct yaffs_dev *dev, int background)
-+{
-+ int aggressive = 0;
-+ int gc_ok = YAFFS_OK;
-+ int max_tries = 0;
-+ int min_erased;
-+ int erased_chunks;
-+ int checkpt_block_adjust;
-+
-+ if (dev->param.gc_control_fn &&
-+ (dev->param.gc_control_fn(dev) & 1) == 0)
-+ return YAFFS_OK;
-+
-+ if (dev->gc_disable)
-+ /* Bail out so we don't get recursive gc */
-+ return YAFFS_OK;
-+
-+ /* This loop should pass the first time.
-+ * Only loops here if the collection does not increase space.
-+ */
-+
-+ do {
-+ max_tries++;
-+
-+ checkpt_block_adjust = yaffs_calc_checkpt_blocks_required(dev);
-+
-+ min_erased =
-+ dev->param.n_reserved_blocks + checkpt_block_adjust + 1;
-+ erased_chunks =
-+ dev->n_erased_blocks * dev->param.chunks_per_block;
-+
-+ /* If we need a block soon then do aggressive gc. */
-+ if (dev->n_erased_blocks < min_erased)
-+ aggressive = 1;
-+ else {
-+ if (!background
-+ && erased_chunks > (dev->n_free_chunks / 4))
-+ break;
-+
-+ if (dev->gc_skip > 20)
-+ dev->gc_skip = 20;
-+ if (erased_chunks < dev->n_free_chunks / 2 ||
-+ dev->gc_skip < 1 || background)
-+ aggressive = 0;
-+ else {
-+ dev->gc_skip--;
-+ break;
-+ }
-+ }
-+
-+ dev->gc_skip = 5;
-+
-+ /* If we don't already have a block being gc'd then see if we
-+ * should start another */
-+
-+ if (dev->gc_block < 1 && !aggressive) {
-+ dev->gc_block = yaffs2_find_refresh_block(dev);
-+ dev->gc_chunk = 0;
-+ dev->n_clean_ups = 0;
-+ }
-+ if (dev->gc_block < 1) {
-+ dev->gc_block =
-+ yaffs_find_gc_block(dev, aggressive, background);
-+ dev->gc_chunk = 0;
-+ dev->n_clean_ups = 0;
-+ }
-+
-+ if (dev->gc_block > 0) {
-+ dev->all_gcs++;
-+ if (!aggressive)
-+ dev->passive_gc_count++;
-+
-+ yaffs_trace(YAFFS_TRACE_GC,
-+ "yaffs: GC n_erased_blocks %d aggressive %d",
-+ dev->n_erased_blocks, aggressive);
-+
-+ gc_ok = yaffs_gc_block(dev, dev->gc_block, aggressive);
-+ }
-+
-+ if (dev->n_erased_blocks < (dev->param.n_reserved_blocks) &&
-+ dev->gc_block > 0) {
-+ yaffs_trace(YAFFS_TRACE_GC,
-+ "yaffs: GC !!!no reclaim!!! n_erased_blocks %d after try %d block %d",
-+ dev->n_erased_blocks, max_tries,
-+ dev->gc_block);
-+ }
-+ } while ((dev->n_erased_blocks < dev->param.n_reserved_blocks) &&
-+ (dev->gc_block > 0) && (max_tries < 2));
-+
-+ return aggressive ? gc_ok : YAFFS_OK;
-+}
-+
-+/*
-+ * yaffs_bg_gc()
-+ * Garbage collects. Intended to be called from a background thread.
-+ * Returns non-zero if at least half the free chunks are erased.
-+ */
-+int yaffs_bg_gc(struct yaffs_dev *dev, unsigned urgency)
-+{
-+ int erased_chunks = dev->n_erased_blocks * dev->param.chunks_per_block;
-+
-+ yaffs_trace(YAFFS_TRACE_BACKGROUND, "Background gc %u", urgency);
-+
-+ yaffs_check_gc(dev, 1);
-+ return erased_chunks > dev->n_free_chunks / 2;
-+}
-+
-+/*-------------------- Data file manipulation -----------------*/
-+
-+static int yaffs_rd_data_obj(struct yaffs_obj *in, int inode_chunk, u8 * buffer)
-+{
-+ int nand_chunk = yaffs_find_chunk_in_file(in, inode_chunk, NULL);
-+
-+ if (nand_chunk >= 0)
-+ return yaffs_rd_chunk_tags_nand(in->my_dev, nand_chunk,
-+ buffer, NULL);
-+ else {
-+ yaffs_trace(YAFFS_TRACE_NANDACCESS,
-+ "Chunk %d not found zero instead",
-+ nand_chunk);
-+ /* get sane (zero) data if you read a hole */
-+ memset(buffer, 0, in->my_dev->data_bytes_per_chunk);
-+ return 0;
-+ }
-+
-+}
-+
-+void yaffs_chunk_del(struct yaffs_dev *dev, int chunk_id, int mark_flash,
-+ int lyn)
-+{
-+ int block;
-+ int page;
-+ struct yaffs_ext_tags tags;
-+ struct yaffs_block_info *bi;
-+
-+ if (chunk_id <= 0)
-+ return;
-+
-+ dev->n_deletions++;
-+ block = chunk_id / dev->param.chunks_per_block;
-+ page = chunk_id % dev->param.chunks_per_block;
-+
-+ if (!yaffs_check_chunk_bit(dev, block, page))
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Deleting invalid chunk %d", chunk_id);
-+
-+ bi = yaffs_get_block_info(dev, block);
-+
-+ yaffs2_update_oldest_dirty_seq(dev, block, bi);
-+
-+ yaffs_trace(YAFFS_TRACE_DELETION,
-+ "line %d delete of chunk %d",
-+ lyn, chunk_id);
-+
-+ if (!dev->param.is_yaffs2 && mark_flash &&
-+ bi->block_state != YAFFS_BLOCK_STATE_COLLECTING) {
-+
-+ memset(&tags, 0, sizeof(tags));
-+ tags.is_deleted = 1;
-+ yaffs_wr_chunk_tags_nand(dev, chunk_id, NULL, &tags);
-+ yaffs_handle_chunk_update(dev, chunk_id, &tags);
-+ } else {
-+ dev->n_unmarked_deletions++;
-+ }
-+
-+ /* Pull out of the management area.
-+ * If the whole block became dirty, this will kick off an erasure.
-+ */
-+ if (bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING ||
-+ bi->block_state == YAFFS_BLOCK_STATE_FULL ||
-+ bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCAN ||
-+ bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) {
-+ dev->n_free_chunks++;
-+ yaffs_clear_chunk_bit(dev, block, page);
-+ bi->pages_in_use--;
-+
-+ if (bi->pages_in_use == 0 &&
-+ !bi->has_shrink_hdr &&
-+ bi->block_state != YAFFS_BLOCK_STATE_ALLOCATING &&
-+ bi->block_state != YAFFS_BLOCK_STATE_NEEDS_SCAN) {
-+ yaffs_block_became_dirty(dev, block);
-+ }
-+ }
-+}
-+
-+static int yaffs_wr_data_obj(struct yaffs_obj *in, int inode_chunk,
-+ const u8 *buffer, int n_bytes, int use_reserve)
-+{
-+ /* Find old chunk Need to do this to get serial number
-+ * Write new one and patch into tree.
-+ * Invalidate old tags.
-+ */
-+
-+ int prev_chunk_id;
-+ struct yaffs_ext_tags prev_tags;
-+ int new_chunk_id;
-+ struct yaffs_ext_tags new_tags;
-+ struct yaffs_dev *dev = in->my_dev;
-+
-+ yaffs_check_gc(dev, 0);
-+
-+ /* Get the previous chunk at this location in the file if it exists.
-+ * If it does not exist then put a zero into the tree. This creates
-+ * the tnode now, rather than later when it is harder to clean up.
-+ */
-+ prev_chunk_id = yaffs_find_chunk_in_file(in, inode_chunk, &prev_tags);
-+ if (prev_chunk_id < 1 &&
-+ !yaffs_put_chunk_in_file(in, inode_chunk, 0, 0))
-+ return 0;
-+
-+ /* Set up new tags */
-+ memset(&new_tags, 0, sizeof(new_tags));
-+
-+ new_tags.chunk_id = inode_chunk;
-+ new_tags.obj_id = in->obj_id;
-+ new_tags.serial_number =
-+ (prev_chunk_id > 0) ? prev_tags.serial_number + 1 : 1;
-+ new_tags.n_bytes = n_bytes;
-+
-+ if (n_bytes < 1 || n_bytes > dev->param.total_bytes_per_chunk) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "Writing %d bytes to chunk!!!!!!!!!",
-+ n_bytes);
-+ BUG();
-+ }
-+
-+ new_chunk_id =
-+ yaffs_write_new_chunk(dev, buffer, &new_tags, use_reserve);
-+
-+ if (new_chunk_id > 0) {
-+ yaffs_put_chunk_in_file(in, inode_chunk, new_chunk_id, 0);
-+
-+ if (prev_chunk_id > 0)
-+ yaffs_chunk_del(dev, prev_chunk_id, 1, __LINE__);
-+
-+ yaffs_verify_file_sane(in);
-+ }
-+ return new_chunk_id;
-+
-+}
-+
-+
-+
-+static int yaffs_do_xattrib_mod(struct yaffs_obj *obj, int set,
-+ const YCHAR *name, const void *value, int size,
-+ int flags)
-+{
-+ struct yaffs_xattr_mod xmod;
-+ int result;
-+
-+ xmod.set = set;
-+ xmod.name = name;
-+ xmod.data = value;
-+ xmod.size = size;
-+ xmod.flags = flags;
-+ xmod.result = -ENOSPC;
-+
-+ result = yaffs_update_oh(obj, NULL, 0, 0, 0, &xmod);
-+
-+ if (result > 0)
-+ return xmod.result;
-+ else
-+ return -ENOSPC;
-+}
-+
-+static int yaffs_apply_xattrib_mod(struct yaffs_obj *obj, char *buffer,
-+ struct yaffs_xattr_mod *xmod)
-+{
-+ int retval = 0;
-+ int x_offs = sizeof(struct yaffs_obj_hdr);
-+ struct yaffs_dev *dev = obj->my_dev;
-+ int x_size = dev->data_bytes_per_chunk - sizeof(struct yaffs_obj_hdr);
-+ char *x_buffer = buffer + x_offs;
-+
-+ if (xmod->set)
-+ retval =
-+ nval_set(x_buffer, x_size, xmod->name, xmod->data,
-+ xmod->size, xmod->flags);
-+ else
-+ retval = nval_del(x_buffer, x_size, xmod->name);
-+
-+ obj->has_xattr = nval_hasvalues(x_buffer, x_size);
-+ obj->xattr_known = 1;
-+ xmod->result = retval;
-+
-+ return retval;
-+}
-+
-+static int yaffs_do_xattrib_fetch(struct yaffs_obj *obj, const YCHAR *name,
-+ void *value, int size)
-+{
-+ char *buffer = NULL;
-+ int result;
-+ struct yaffs_ext_tags tags;
-+ struct yaffs_dev *dev = obj->my_dev;
-+ int x_offs = sizeof(struct yaffs_obj_hdr);
-+ int x_size = dev->data_bytes_per_chunk - sizeof(struct yaffs_obj_hdr);
-+ char *x_buffer;
-+ int retval = 0;
-+
-+ if (obj->hdr_chunk < 1)
-+ return -ENODATA;
-+
-+ /* If we know that the object has no xattribs then don't do all the
-+ * reading and parsing.
-+ */
-+ if (obj->xattr_known && !obj->has_xattr) {
-+ if (name)
-+ return -ENODATA;
-+ else
-+ return 0;
-+ }
-+
-+ buffer = (char *)yaffs_get_temp_buffer(dev);
-+ if (!buffer)
-+ return -ENOMEM;
-+
-+ result =
-+ yaffs_rd_chunk_tags_nand(dev, obj->hdr_chunk, (u8 *) buffer, &tags);
-+
-+ if (result != YAFFS_OK)
-+ retval = -ENOENT;
-+ else {
-+ x_buffer = buffer + x_offs;
-+
-+ if (!obj->xattr_known) {
-+ obj->has_xattr = nval_hasvalues(x_buffer, x_size);
-+ obj->xattr_known = 1;
-+ }
-+
-+ if (name)
-+ retval = nval_get(x_buffer, x_size, name, value, size);
-+ else
-+ retval = nval_list(x_buffer, x_size, value, size);
-+ }
-+ yaffs_release_temp_buffer(dev, (u8 *) buffer);
-+ return retval;
-+}
-+
-+int yaffs_set_xattrib(struct yaffs_obj *obj, const YCHAR * name,
-+ const void *value, int size, int flags)
-+{
-+ return yaffs_do_xattrib_mod(obj, 1, name, value, size, flags);
-+}
-+
-+int yaffs_remove_xattrib(struct yaffs_obj *obj, const YCHAR * name)
-+{
-+ return yaffs_do_xattrib_mod(obj, 0, name, NULL, 0, 0);
-+}
-+
-+int yaffs_get_xattrib(struct yaffs_obj *obj, const YCHAR * name, void *value,
-+ int size)
-+{
-+ return yaffs_do_xattrib_fetch(obj, name, value, size);
-+}
-+
-+int yaffs_list_xattrib(struct yaffs_obj *obj, char *buffer, int size)
-+{
-+ return yaffs_do_xattrib_fetch(obj, NULL, buffer, size);
-+}
-+
-+static void yaffs_check_obj_details_loaded(struct yaffs_obj *in)
-+{
-+ u8 *buf;
-+ struct yaffs_obj_hdr *oh;
-+ struct yaffs_dev *dev;
-+ struct yaffs_ext_tags tags;
-+ int result;
-+ int alloc_failed = 0;
-+
-+ if (!in || !in->lazy_loaded || in->hdr_chunk < 1)
-+ return;
-+
-+ dev = in->my_dev;
-+ in->lazy_loaded = 0;
-+ buf = yaffs_get_temp_buffer(dev);
-+
-+ result = yaffs_rd_chunk_tags_nand(dev, in->hdr_chunk, buf, &tags);
-+ oh = (struct yaffs_obj_hdr *)buf;
-+
-+ in->yst_mode = oh->yst_mode;
-+ yaffs_load_attribs(in, oh);
-+ yaffs_set_obj_name_from_oh(in, oh);
-+
-+ if (in->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) {
-+ in->variant.symlink_variant.alias =
-+ yaffs_clone_str(oh->alias);
-+ if (!in->variant.symlink_variant.alias)
-+ alloc_failed = 1; /* Not returned */
-+ }
-+ yaffs_release_temp_buffer(dev, buf);
-+}
-+
-+static void yaffs_load_name_from_oh(struct yaffs_dev *dev, YCHAR *name,
-+ const YCHAR *oh_name, int buff_size)
-+{
-+#ifdef CONFIG_YAFFS_AUTO_UNICODE
-+ if (dev->param.auto_unicode) {
-+ if (*oh_name) {
-+ /* It is an ASCII name, do an ASCII to
-+ * unicode conversion */
-+ const char *ascii_oh_name = (const char *)oh_name;
-+ int n = buff_size - 1;
-+ while (n > 0 && *ascii_oh_name) {
-+ *name = *ascii_oh_name;
-+ name++;
-+ ascii_oh_name++;
-+ n--;
-+ }
-+ } else {
-+ strncpy(name, oh_name + 1, buff_size - 1);
-+ }
-+ } else {
-+#else
-+ (void) dev;
-+ {
-+#endif
-+ strncpy(name, oh_name, buff_size - 1);
-+ }
-+}
-+
-+static void yaffs_load_oh_from_name(struct yaffs_dev *dev, YCHAR *oh_name,
-+ const YCHAR *name)
-+{
-+#ifdef CONFIG_YAFFS_AUTO_UNICODE
-+
-+ int is_ascii;
-+ YCHAR *w;
-+
-+ if (dev->param.auto_unicode) {
-+
-+ is_ascii = 1;
-+ w = name;
-+
-+ /* Figure out if the name will fit in ascii character set */
-+ while (is_ascii && *w) {
-+ if ((*w) & 0xff00)
-+ is_ascii = 0;
-+ w++;
-+ }
-+
-+ if (is_ascii) {
-+ /* It is an ASCII name, so convert unicode to ascii */
-+ char *ascii_oh_name = (char *)oh_name;
-+ int n = YAFFS_MAX_NAME_LENGTH - 1;
-+ while (n > 0 && *name) {
-+ *ascii_oh_name = *name;
-+ name++;
-+ ascii_oh_name++;
-+ n--;
-+ }
-+ } else {
-+ /* Unicode name, so save starting at the second YCHAR */
-+ *oh_name = 0;
-+ strncpy(oh_name + 1, name, YAFFS_MAX_NAME_LENGTH - 2);
-+ }
-+ } else {
-+#else
-+ dev = dev;
-+ {
-+#endif
-+ strncpy(oh_name, name, YAFFS_MAX_NAME_LENGTH - 1);
-+ }
-+}
-+
-+/* UpdateObjectHeader updates the header on NAND for an object.
-+ * If name is not NULL, then that new name is used.
-+ */
-+int yaffs_update_oh(struct yaffs_obj *in, const YCHAR *name, int force,
-+ int is_shrink, int shadows, struct yaffs_xattr_mod *xmod)
-+{
-+
-+ struct yaffs_block_info *bi;
-+ struct yaffs_dev *dev = in->my_dev;
-+ int prev_chunk_id;
-+ int ret_val = 0;
-+ int result = 0;
-+ int new_chunk_id;
-+ struct yaffs_ext_tags new_tags;
-+ struct yaffs_ext_tags old_tags;
-+ const YCHAR *alias = NULL;
-+ u8 *buffer = NULL;
-+ YCHAR old_name[YAFFS_MAX_NAME_LENGTH + 1];
-+ struct yaffs_obj_hdr *oh = NULL;
-+ loff_t file_size = 0;
-+
-+ strcpy(old_name, _Y("silly old name"));
-+
-+ if (in->fake && in != dev->root_dir && !force && !xmod)
-+ return ret_val;
-+
-+ yaffs_check_gc(dev, 0);
-+ yaffs_check_obj_details_loaded(in);
-+
-+ buffer = yaffs_get_temp_buffer(in->my_dev);
-+ oh = (struct yaffs_obj_hdr *)buffer;
-+
-+ prev_chunk_id = in->hdr_chunk;
-+
-+ if (prev_chunk_id > 0) {
-+ result = yaffs_rd_chunk_tags_nand(dev, prev_chunk_id,
-+ buffer, &old_tags);
-+
-+ yaffs_verify_oh(in, oh, &old_tags, 0);
-+ memcpy(old_name, oh->name, sizeof(oh->name));
-+ memset(buffer, 0xff, sizeof(struct yaffs_obj_hdr));
-+ } else {
-+ memset(buffer, 0xff, dev->data_bytes_per_chunk);
-+ }
-+
-+ oh->type = in->variant_type;
-+ oh->yst_mode = in->yst_mode;
-+ oh->shadows_obj = oh->inband_shadowed_obj_id = shadows;
-+
-+ yaffs_load_attribs_oh(oh, in);
-+
-+ if (in->parent)
-+ oh->parent_obj_id = in->parent->obj_id;
-+ else
-+ oh->parent_obj_id = 0;
-+
-+ if (name && *name) {
-+ memset(oh->name, 0, sizeof(oh->name));
-+ yaffs_load_oh_from_name(dev, oh->name, name);
-+ } else if (prev_chunk_id > 0) {
-+ memcpy(oh->name, old_name, sizeof(oh->name));
-+ } else {
-+ memset(oh->name, 0, sizeof(oh->name));
-+ }
-+
-+ oh->is_shrink = is_shrink;
-+
-+ switch (in->variant_type) {
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ /* Should not happen */
-+ break;
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ if (oh->parent_obj_id != YAFFS_OBJECTID_DELETED &&
-+ oh->parent_obj_id != YAFFS_OBJECTID_UNLINKED)
-+ file_size = in->variant.file_variant.file_size;
-+ yaffs_oh_size_load(oh, file_size);
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ oh->equiv_id = in->variant.hardlink_variant.equiv_id;
-+ break;
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ /* Do nothing */
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ /* Do nothing */
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ alias = in->variant.symlink_variant.alias;
-+ if (!alias)
-+ alias = _Y("no alias");
-+ strncpy(oh->alias, alias, YAFFS_MAX_ALIAS_LENGTH);
-+ oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0;
-+ break;
-+ }
-+
-+ /* process any xattrib modifications */
-+ if (xmod)
-+ yaffs_apply_xattrib_mod(in, (char *)buffer, xmod);
-+
-+ /* Tags */
-+ memset(&new_tags, 0, sizeof(new_tags));
-+ in->serial++;
-+ new_tags.chunk_id = 0;
-+ new_tags.obj_id = in->obj_id;
-+ new_tags.serial_number = in->serial;
-+
-+ /* Add extra info for file header */
-+ new_tags.extra_available = 1;
-+ new_tags.extra_parent_id = oh->parent_obj_id;
-+ new_tags.extra_file_size = file_size;
-+ new_tags.extra_is_shrink = oh->is_shrink;
-+ new_tags.extra_equiv_id = oh->equiv_id;
-+ new_tags.extra_shadows = (oh->shadows_obj > 0) ? 1 : 0;
-+ new_tags.extra_obj_type = in->variant_type;
-+ yaffs_verify_oh(in, oh, &new_tags, 1);
-+
-+ /* Create new chunk in NAND */
-+ new_chunk_id =
-+ yaffs_write_new_chunk(dev, buffer, &new_tags,
-+ (prev_chunk_id > 0) ? 1 : 0);
-+
-+ if (buffer)
-+ yaffs_release_temp_buffer(dev, buffer);
-+
-+ if (new_chunk_id < 0)
-+ return new_chunk_id;
-+
-+ in->hdr_chunk = new_chunk_id;
-+
-+ if (prev_chunk_id > 0)
-+ yaffs_chunk_del(dev, prev_chunk_id, 1, __LINE__);
-+
-+ if (!yaffs_obj_cache_dirty(in))
-+ in->dirty = 0;
-+
-+ /* If this was a shrink, then mark the block
-+ * that the chunk lives on */
-+ if (is_shrink) {
-+ bi = yaffs_get_block_info(in->my_dev,
-+ new_chunk_id /
-+ in->my_dev->param.chunks_per_block);
-+ bi->has_shrink_hdr = 1;
-+ }
-+
-+
-+ return new_chunk_id;
-+}
-+
-+/*--------------------- File read/write ------------------------
-+ * Read and write have very similar structures.
-+ * In general the read/write has three parts to it
-+ * An incomplete chunk to start with (if the read/write is not chunk-aligned)
-+ * Some complete chunks
-+ * An incomplete chunk to end off with
-+ *
-+ * Curve-balls: the first chunk might also be the last chunk.
-+ */
-+
-+int yaffs_file_rd(struct yaffs_obj *in, u8 * buffer, loff_t offset, int n_bytes)
-+{
-+ int chunk;
-+ u32 start;
-+ int n_copy;
-+ int n = n_bytes;
-+ int n_done = 0;
-+ struct yaffs_cache *cache;
-+ struct yaffs_dev *dev;
-+
-+ dev = in->my_dev;
-+
-+ while (n > 0) {
-+ yaffs_addr_to_chunk(dev, offset, &chunk, &start);
-+ chunk++;
-+
-+ /* OK now check for the curveball where the start and end are in
-+ * the same chunk.
-+ */
-+ if ((start + n) < dev->data_bytes_per_chunk)
-+ n_copy = n;
-+ else
-+ n_copy = dev->data_bytes_per_chunk - start;
-+
-+ cache = yaffs_find_chunk_cache(in, chunk);
-+
-+ /* If the chunk is already in the cache or it is less than
-+ * a whole chunk or we're using inband tags then use the cache
-+ * (if there is caching) else bypass the cache.
-+ */
-+ if (cache || n_copy != dev->data_bytes_per_chunk ||
-+ dev->param.inband_tags) {
-+ if (dev->param.n_caches > 0) {
-+
-+ /* If we can't find the data in the cache,
-+ * then load it up. */
-+
-+ if (!cache) {
-+ cache =
-+ yaffs_grab_chunk_cache(in->my_dev);
-+ cache->object = in;
-+ cache->chunk_id = chunk;
-+ cache->dirty = 0;
-+ cache->locked = 0;
-+ yaffs_rd_data_obj(in, chunk,
-+ cache->data);
-+ cache->n_bytes = 0;
-+ }
-+
-+ yaffs_use_cache(dev, cache, 0);
-+
-+ cache->locked = 1;
-+
-+ memcpy(buffer, &cache->data[start], n_copy);
-+
-+ cache->locked = 0;
-+ } else {
-+ /* Read into the local buffer then copy.. */
-+
-+ u8 *local_buffer =
-+ yaffs_get_temp_buffer(dev);
-+ yaffs_rd_data_obj(in, chunk, local_buffer);
-+
-+ memcpy(buffer, &local_buffer[start], n_copy);
-+
-+ yaffs_release_temp_buffer(dev, local_buffer);
-+ }
-+ } else {
-+ /* A full chunk. Read directly into the buffer. */
-+ yaffs_rd_data_obj(in, chunk, buffer);
-+ }
-+ n -= n_copy;
-+ offset += n_copy;
-+ buffer += n_copy;
-+ n_done += n_copy;
-+ }
-+ return n_done;
-+}
-+
-+int yaffs_do_file_wr(struct yaffs_obj *in, const u8 *buffer, loff_t offset,
-+ int n_bytes, int write_through)
-+{
-+
-+ int chunk;
-+ u32 start;
-+ int n_copy;
-+ int n = n_bytes;
-+ int n_done = 0;
-+ int n_writeback;
-+ loff_t start_write = offset;
-+ int chunk_written = 0;
-+ u32 n_bytes_read;
-+ loff_t chunk_start;
-+ struct yaffs_dev *dev;
-+
-+ dev = in->my_dev;
-+
-+ while (n > 0 && chunk_written >= 0) {
-+ yaffs_addr_to_chunk(dev, offset, &chunk, &start);
-+
-+ if (((loff_t)chunk) *
-+ dev->data_bytes_per_chunk + start != offset ||
-+ start >= dev->data_bytes_per_chunk) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "AddrToChunk of offset %lld gives chunk %d start %d",
-+ offset, chunk, start);
-+ }
-+ chunk++; /* File pos to chunk in file offset */
-+
-+ /* OK now check for the curveball where the start and end are in
-+ * the same chunk.
-+ */
-+
-+ if ((start + n) < dev->data_bytes_per_chunk) {
-+ n_copy = n;
-+
-+ /* Now calculate how many bytes to write back....
-+ * If we're overwriting and not writing to then end of
-+ * file then we need to write back as much as was there
-+ * before.
-+ */
-+
-+ chunk_start = (((loff_t)(chunk - 1)) *
-+ dev->data_bytes_per_chunk);
-+
-+ if (chunk_start > in->variant.file_variant.file_size)
-+ n_bytes_read = 0; /* Past end of file */
-+ else
-+ n_bytes_read =
-+ in->variant.file_variant.file_size -
-+ chunk_start;
-+
-+ if (n_bytes_read > dev->data_bytes_per_chunk)
-+ n_bytes_read = dev->data_bytes_per_chunk;
-+
-+ n_writeback =
-+ (n_bytes_read >
-+ (start + n)) ? n_bytes_read : (start + n);
-+
-+ if (n_writeback < 0 ||
-+ n_writeback > dev->data_bytes_per_chunk)
-+ BUG();
-+
-+ } else {
-+ n_copy = dev->data_bytes_per_chunk - start;
-+ n_writeback = dev->data_bytes_per_chunk;
-+ }
-+
-+ if (n_copy != dev->data_bytes_per_chunk ||
-+ !dev->param.cache_bypass_aligned ||
-+ dev->param.inband_tags) {
-+ /* An incomplete start or end chunk (or maybe both
-+ * start and end chunk), or we're using inband tags,
-+ * or we're forcing writes through the cache,
-+ * so we want to use the cache buffers.
-+ */
-+ if (dev->param.n_caches > 0) {
-+ struct yaffs_cache *cache;
-+
-+ /* If we can't find the data in the cache, then
-+ * load the cache */
-+ cache = yaffs_find_chunk_cache(in, chunk);
-+
-+ if (!cache &&
-+ yaffs_check_alloc_available(dev, 1)) {
-+ cache = yaffs_grab_chunk_cache(dev);
-+ cache->object = in;
-+ cache->chunk_id = chunk;
-+ cache->dirty = 0;
-+ cache->locked = 0;
-+ yaffs_rd_data_obj(in, chunk,
-+ cache->data);
-+ } else if (cache &&
-+ !cache->dirty &&
-+ !yaffs_check_alloc_available(dev,
-+ 1)) {
-+ /* Drop the cache if it was a read cache
-+ * item and no space check has been made
-+ * for it.
-+ */
-+ cache = NULL;
-+ }
-+
-+ if (cache) {
-+ yaffs_use_cache(dev, cache, 1);
-+ cache->locked = 1;
-+
-+ memcpy(&cache->data[start], buffer,
-+ n_copy);
-+
-+ cache->locked = 0;
-+ cache->n_bytes = n_writeback;
-+
-+ if (write_through) {
-+ chunk_written =
-+ yaffs_wr_data_obj
-+ (cache->object,
-+ cache->chunk_id,
-+ cache->data,
-+ cache->n_bytes, 1);
-+ cache->dirty = 0;
-+ }
-+ } else {
-+ chunk_written = -1; /* fail write */
-+ }
-+ } else {
-+ /* An incomplete start or end chunk (or maybe
-+ * both start and end chunk). Read into the
-+ * local buffer then copy over and write back.
-+ */
-+
-+ u8 *local_buffer = yaffs_get_temp_buffer(dev);
-+
-+ yaffs_rd_data_obj(in, chunk, local_buffer);
-+ memcpy(&local_buffer[start], buffer, n_copy);
-+
-+ chunk_written =
-+ yaffs_wr_data_obj(in, chunk,
-+ local_buffer,
-+ n_writeback, 0);
-+
-+ yaffs_release_temp_buffer(dev, local_buffer);
-+ }
-+ } else {
-+ /* A full chunk. Write directly from the buffer. */
-+
-+ chunk_written =
-+ yaffs_wr_data_obj(in, chunk, buffer,
-+ dev->data_bytes_per_chunk, 0);
-+
-+ /* Since we've overwritten the cached data,
-+ * we better invalidate it. */
-+ yaffs_invalidate_chunk_cache(in, chunk);
-+ }
-+
-+ if (chunk_written >= 0) {
-+ n -= n_copy;
-+ offset += n_copy;
-+ buffer += n_copy;
-+ n_done += n_copy;
-+ }
-+ }
-+
-+ /* Update file object */
-+
-+ if ((start_write + n_done) > in->variant.file_variant.file_size)
-+ in->variant.file_variant.file_size = (start_write + n_done);
-+
-+ in->dirty = 1;
-+ return n_done;
-+}
-+
-+int yaffs_wr_file(struct yaffs_obj *in, const u8 *buffer, loff_t offset,
-+ int n_bytes, int write_through)
-+{
-+ yaffs2_handle_hole(in, offset);
-+ return yaffs_do_file_wr(in, buffer, offset, n_bytes, write_through);
-+}
-+
-+/* ---------------------- File resizing stuff ------------------ */
-+
-+static void yaffs_prune_chunks(struct yaffs_obj *in, loff_t new_size)
-+{
-+
-+ struct yaffs_dev *dev = in->my_dev;
-+ loff_t old_size = in->variant.file_variant.file_size;
-+ int i;
-+ int chunk_id;
-+ u32 dummy;
-+ int last_del;
-+ int start_del;
-+
-+ if (old_size > 0)
-+ yaffs_addr_to_chunk(dev, old_size - 1, &last_del, &dummy);
-+ else
-+ last_del = 0;
-+
-+ yaffs_addr_to_chunk(dev, new_size + dev->data_bytes_per_chunk - 1,
-+ &start_del, &dummy);
-+ last_del++;
-+ start_del++;
-+
-+ /* Delete backwards so that we don't end up with holes if
-+ * power is lost part-way through the operation.
-+ */
-+ for (i = last_del; i >= start_del; i--) {
-+ /* NB this could be optimised somewhat,
-+ * eg. could retrieve the tags and write them without
-+ * using yaffs_chunk_del
-+ */
-+
-+ chunk_id = yaffs_find_del_file_chunk(in, i, NULL);
-+
-+ if (chunk_id < 1)
-+ continue;
-+
-+ if (chunk_id <
-+ (dev->internal_start_block * dev->param.chunks_per_block) ||
-+ chunk_id >=
-+ ((dev->internal_end_block + 1) *
-+ dev->param.chunks_per_block)) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "Found daft chunk_id %d for %d",
-+ chunk_id, i);
-+ } else {
-+ in->n_data_chunks--;
-+ yaffs_chunk_del(dev, chunk_id, 1, __LINE__);
-+ }
-+ }
-+}
-+
-+void yaffs_resize_file_down(struct yaffs_obj *obj, loff_t new_size)
-+{
-+ int new_full;
-+ u32 new_partial;
-+ struct yaffs_dev *dev = obj->my_dev;
-+
-+ yaffs_addr_to_chunk(dev, new_size, &new_full, &new_partial);
-+
-+ yaffs_prune_chunks(obj, new_size);
-+
-+ if (new_partial != 0) {
-+ int last_chunk = 1 + new_full;
-+ u8 *local_buffer = yaffs_get_temp_buffer(dev);
-+
-+ /* Rewrite the last chunk with its new size and zero pad */
-+ yaffs_rd_data_obj(obj, last_chunk, local_buffer);
-+ memset(local_buffer + new_partial, 0,
-+ dev->data_bytes_per_chunk - new_partial);
-+
-+ yaffs_wr_data_obj(obj, last_chunk, local_buffer,
-+ new_partial, 1);
-+
-+ yaffs_release_temp_buffer(dev, local_buffer);
-+ }
-+
-+ obj->variant.file_variant.file_size = new_size;
-+
-+ yaffs_prune_tree(dev, &obj->variant.file_variant);
-+}
-+
-+int yaffs_resize_file(struct yaffs_obj *in, loff_t new_size)
-+{
-+ struct yaffs_dev *dev = in->my_dev;
-+ loff_t old_size = in->variant.file_variant.file_size;
-+
-+ yaffs_flush_file_cache(in);
-+ yaffs_invalidate_whole_cache(in);
-+
-+ yaffs_check_gc(dev, 0);
-+
-+ if (in->variant_type != YAFFS_OBJECT_TYPE_FILE)
-+ return YAFFS_FAIL;
-+
-+ if (new_size == old_size)
-+ return YAFFS_OK;
-+
-+ if (new_size > old_size) {
-+ yaffs2_handle_hole(in, new_size);
-+ in->variant.file_variant.file_size = new_size;
-+ } else {
-+ /* new_size < old_size */
-+ yaffs_resize_file_down(in, new_size);
-+ }
-+
-+ /* Write a new object header to reflect the resize.
-+ * show we've shrunk the file, if need be
-+ * Do this only if the file is not in the deleted directories
-+ * and is not shadowed.
-+ */
-+ if (in->parent &&
-+ !in->is_shadowed &&
-+ in->parent->obj_id != YAFFS_OBJECTID_UNLINKED &&
-+ in->parent->obj_id != YAFFS_OBJECTID_DELETED)
-+ yaffs_update_oh(in, NULL, 0, 0, 0, NULL);
-+
-+ return YAFFS_OK;
-+}
-+
-+int yaffs_flush_file(struct yaffs_obj *in, int update_time, int data_sync)
-+{
-+ if (!in->dirty)
-+ return YAFFS_OK;
-+
-+ yaffs_flush_file_cache(in);
-+
-+ if (data_sync)
-+ return YAFFS_OK;
-+
-+ if (update_time)
-+ yaffs_load_current_time(in, 0, 0);
-+
-+ return (yaffs_update_oh(in, NULL, 0, 0, 0, NULL) >= 0) ?
-+ YAFFS_OK : YAFFS_FAIL;
-+}
-+
-+
-+/* yaffs_del_file deletes the whole file data
-+ * and the inode associated with the file.
-+ * It does not delete the links associated with the file.
-+ */
-+static int yaffs_unlink_file_if_needed(struct yaffs_obj *in)
-+{
-+ int ret_val;
-+ int del_now = 0;
-+ struct yaffs_dev *dev = in->my_dev;
-+
-+ if (!in->my_inode)
-+ del_now = 1;
-+
-+ if (del_now) {
-+ ret_val =
-+ yaffs_change_obj_name(in, in->my_dev->del_dir,
-+ _Y("deleted"), 0, 0);
-+ yaffs_trace(YAFFS_TRACE_TRACING,
-+ "yaffs: immediate deletion of file %d",
-+ in->obj_id);
-+ in->deleted = 1;
-+ in->my_dev->n_deleted_files++;
-+ if (dev->param.disable_soft_del || dev->param.is_yaffs2)
-+ yaffs_resize_file(in, 0);
-+ yaffs_soft_del_file(in);
-+ } else {
-+ ret_val =
-+ yaffs_change_obj_name(in, in->my_dev->unlinked_dir,
-+ _Y("unlinked"), 0, 0);
-+ }
-+ return ret_val;
-+}
-+
-+static int yaffs_del_file(struct yaffs_obj *in)
-+{
-+ int ret_val = YAFFS_OK;
-+ int deleted; /* Need to cache value on stack if in is freed */
-+ struct yaffs_dev *dev = in->my_dev;
-+
-+ if (dev->param.disable_soft_del || dev->param.is_yaffs2)
-+ yaffs_resize_file(in, 0);
-+
-+ if (in->n_data_chunks > 0) {
-+ /* Use soft deletion if there is data in the file.
-+ * That won't be the case if it has been resized to zero.
-+ */
-+ if (!in->unlinked)
-+ ret_val = yaffs_unlink_file_if_needed(in);
-+
-+ deleted = in->deleted;
-+
-+ if (ret_val == YAFFS_OK && in->unlinked && !in->deleted) {
-+ in->deleted = 1;
-+ deleted = 1;
-+ in->my_dev->n_deleted_files++;
-+ yaffs_soft_del_file(in);
-+ }
-+ return deleted ? YAFFS_OK : YAFFS_FAIL;
-+ } else {
-+ /* The file has no data chunks so we toss it immediately */
-+ yaffs_free_tnode(in->my_dev, in->variant.file_variant.top);
-+ in->variant.file_variant.top = NULL;
-+ yaffs_generic_obj_del(in);
-+
-+ return YAFFS_OK;
-+ }
-+}
-+
-+int yaffs_is_non_empty_dir(struct yaffs_obj *obj)
-+{
-+ return (obj &&
-+ obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) &&
-+ !(list_empty(&obj->variant.dir_variant.children));
-+}
-+
-+static int yaffs_del_dir(struct yaffs_obj *obj)
-+{
-+ /* First check that the directory is empty. */
-+ if (yaffs_is_non_empty_dir(obj))
-+ return YAFFS_FAIL;
-+
-+ return yaffs_generic_obj_del(obj);
-+}
-+
-+static int yaffs_del_symlink(struct yaffs_obj *in)
-+{
-+ kfree(in->variant.symlink_variant.alias);
-+ in->variant.symlink_variant.alias = NULL;
-+
-+ return yaffs_generic_obj_del(in);
-+}
-+
-+static int yaffs_del_link(struct yaffs_obj *in)
-+{
-+ /* remove this hardlink from the list associated with the equivalent
-+ * object
-+ */
-+ list_del_init(&in->hard_links);
-+ return yaffs_generic_obj_del(in);
-+}
-+
-+int yaffs_del_obj(struct yaffs_obj *obj)
-+{
-+ int ret_val = -1;
-+
-+ switch (obj->variant_type) {
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ ret_val = yaffs_del_file(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ if (!list_empty(&obj->variant.dir_variant.dirty)) {
-+ yaffs_trace(YAFFS_TRACE_BACKGROUND,
-+ "Remove object %d from dirty directories",
-+ obj->obj_id);
-+ list_del_init(&obj->variant.dir_variant.dirty);
-+ }
-+ return yaffs_del_dir(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ ret_val = yaffs_del_symlink(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ ret_val = yaffs_del_link(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ ret_val = yaffs_generic_obj_del(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ ret_val = 0;
-+ break; /* should not happen. */
-+ }
-+ return ret_val;
-+}
-+
-+
-+static void yaffs_empty_dir_to_dir(struct yaffs_obj *from_dir,
-+ struct yaffs_obj *to_dir)
-+{
-+ struct yaffs_obj *obj;
-+ struct list_head *lh;
-+ struct list_head *n;
-+
-+ list_for_each_safe(lh, n, &from_dir->variant.dir_variant.children) {
-+ obj = list_entry(lh, struct yaffs_obj, siblings);
-+ yaffs_add_obj_to_dir(to_dir, obj);
-+ }
-+}
-+
-+struct yaffs_obj *yaffs_retype_obj(struct yaffs_obj *obj,
-+ enum yaffs_obj_type type)
-+{
-+ /* Tear down the old variant */
-+ switch (obj->variant_type) {
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ /* Nuke file data */
-+ yaffs_resize_file(obj, 0);
-+ yaffs_free_tnode(obj->my_dev, obj->variant.file_variant.top);
-+ obj->variant.file_variant.top = NULL;
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ /* Put the children in lost and found. */
-+ yaffs_empty_dir_to_dir(obj, obj->my_dev->lost_n_found);
-+ if (!list_empty(&obj->variant.dir_variant.dirty))
-+ list_del_init(&obj->variant.dir_variant.dirty);
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ /* Nuke symplink data */
-+ kfree(obj->variant.symlink_variant.alias);
-+ obj->variant.symlink_variant.alias = NULL;
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ list_del_init(&obj->hard_links);
-+ break;
-+ default:
-+ break;
-+ }
-+
-+ memset(&obj->variant, 0, sizeof(obj->variant));
-+
-+ /*Set up new variant if the memset is not enough. */
-+ switch (type) {
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ INIT_LIST_HEAD(&obj->variant.dir_variant.children);
-+ INIT_LIST_HEAD(&obj->variant.dir_variant.dirty);
-+ break;
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ default:
-+ break;
-+ }
-+
-+ obj->variant_type = type;
-+
-+ return obj;
-+
-+}
-+
-+static int yaffs_unlink_worker(struct yaffs_obj *obj)
-+{
-+ int del_now = 0;
-+
-+ if (!obj)
-+ return YAFFS_FAIL;
-+
-+ if (!obj->my_inode)
-+ del_now = 1;
-+
-+ yaffs_update_parent(obj->parent);
-+
-+ if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) {
-+ return yaffs_del_link(obj);
-+ } else if (!list_empty(&obj->hard_links)) {
-+ /* Curve ball: We're unlinking an object that has a hardlink.
-+ *
-+ * This problem arises because we are not strictly following
-+ * The Linux link/inode model.
-+ *
-+ * We can't really delete the object.
-+ * Instead, we do the following:
-+ * - Select a hardlink.
-+ * - Unhook it from the hard links
-+ * - Move it from its parent directory so that the rename works.
-+ * - Rename the object to the hardlink's name.
-+ * - Delete the hardlink
-+ */
-+
-+ struct yaffs_obj *hl;
-+ struct yaffs_obj *parent;
-+ int ret_val;
-+ YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
-+
-+ hl = list_entry(obj->hard_links.next, struct yaffs_obj,
-+ hard_links);
-+
-+ yaffs_get_obj_name(hl, name, YAFFS_MAX_NAME_LENGTH + 1);
-+ parent = hl->parent;
-+
-+ list_del_init(&hl->hard_links);
-+
-+ yaffs_add_obj_to_dir(obj->my_dev->unlinked_dir, hl);
-+
-+ ret_val = yaffs_change_obj_name(obj, parent, name, 0, 0);
-+
-+ if (ret_val == YAFFS_OK)
-+ ret_val = yaffs_generic_obj_del(hl);
-+
-+ return ret_val;
-+
-+ } else if (del_now) {
-+ switch (obj->variant_type) {
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ return yaffs_del_file(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ list_del_init(&obj->variant.dir_variant.dirty);
-+ return yaffs_del_dir(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ return yaffs_del_symlink(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ return yaffs_generic_obj_del(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ default:
-+ return YAFFS_FAIL;
-+ }
-+ } else if (yaffs_is_non_empty_dir(obj)) {
-+ return YAFFS_FAIL;
-+ } else {
-+ return yaffs_change_obj_name(obj, obj->my_dev->unlinked_dir,
-+ _Y("unlinked"), 0, 0);
-+ }
-+}
-+
-+static int yaffs_unlink_obj(struct yaffs_obj *obj)
-+{
-+ if (obj && obj->unlink_allowed)
-+ return yaffs_unlink_worker(obj);
-+
-+ return YAFFS_FAIL;
-+}
-+
-+int yaffs_unlinker(struct yaffs_obj *dir, const YCHAR *name)
-+{
-+ struct yaffs_obj *obj;
-+
-+ obj = yaffs_find_by_name(dir, name);
-+ return yaffs_unlink_obj(obj);
-+}
-+
-+/* Note:
-+ * If old_name is NULL then we take old_dir as the object to be renamed.
-+ */
-+int yaffs_rename_obj(struct yaffs_obj *old_dir, const YCHAR *old_name,
-+ struct yaffs_obj *new_dir, const YCHAR *new_name)
-+{
-+ struct yaffs_obj *obj = NULL;
-+ struct yaffs_obj *existing_target = NULL;
-+ int force = 0;
-+ int result;
-+ struct yaffs_dev *dev;
-+
-+ if (!old_dir || old_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ BUG();
-+ return YAFFS_FAIL;
-+ }
-+ if (!new_dir || new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ BUG();
-+ return YAFFS_FAIL;
-+ }
-+
-+ dev = old_dir->my_dev;
-+
-+#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
-+ /* Special case for case insemsitive systems.
-+ * While look-up is case insensitive, the name isn't.
-+ * Therefore we might want to change x.txt to X.txt
-+ */
-+ if (old_dir == new_dir &&
-+ old_name && new_name &&
-+ strcmp(old_name, new_name) == 0)
-+ force = 1;
-+#endif
-+
-+ if (strnlen(new_name, YAFFS_MAX_NAME_LENGTH + 1) >
-+ YAFFS_MAX_NAME_LENGTH)
-+ /* ENAMETOOLONG */
-+ return YAFFS_FAIL;
-+
-+ if (old_name)
-+ obj = yaffs_find_by_name(old_dir, old_name);
-+ else{
-+ obj = old_dir;
-+ old_dir = obj->parent;
-+ }
-+
-+ if (obj && obj->rename_allowed) {
-+ /* Now handle an existing target, if there is one */
-+ existing_target = yaffs_find_by_name(new_dir, new_name);
-+ if (yaffs_is_non_empty_dir(existing_target)) {
-+ return YAFFS_FAIL; /* ENOTEMPTY */
-+ } else if (existing_target && existing_target != obj) {
-+ /* Nuke the target first, using shadowing,
-+ * but only if it isn't the same object.
-+ *
-+ * Note we must disable gc here otherwise it can mess
-+ * up the shadowing.
-+ *
-+ */
-+ dev->gc_disable = 1;
-+ yaffs_change_obj_name(obj, new_dir, new_name, force,
-+ existing_target->obj_id);
-+ existing_target->is_shadowed = 1;
-+ yaffs_unlink_obj(existing_target);
-+ dev->gc_disable = 0;
-+ }
-+
-+ result = yaffs_change_obj_name(obj, new_dir, new_name, 1, 0);
-+
-+ yaffs_update_parent(old_dir);
-+ if (new_dir != old_dir)
-+ yaffs_update_parent(new_dir);
-+
-+ return result;
-+ }
-+ return YAFFS_FAIL;
-+}
-+
-+/*----------------------- Initialisation Scanning ---------------------- */
-+
-+void yaffs_handle_shadowed_obj(struct yaffs_dev *dev, int obj_id,
-+ int backward_scanning)
-+{
-+ struct yaffs_obj *obj;
-+
-+ if (backward_scanning) {
-+ /* Handle YAFFS2 case (backward scanning)
-+ * If the shadowed object exists then ignore.
-+ */
-+ obj = yaffs_find_by_number(dev, obj_id);
-+ if (obj)
-+ return;
-+ }
-+
-+ /* Let's create it (if it does not exist) assuming it is a file so that
-+ * it can do shrinking etc.
-+ * We put it in unlinked dir to be cleaned up after the scanning
-+ */
-+ obj =
-+ yaffs_find_or_create_by_number(dev, obj_id, YAFFS_OBJECT_TYPE_FILE);
-+ if (!obj)
-+ return;
-+ obj->is_shadowed = 1;
-+ yaffs_add_obj_to_dir(dev->unlinked_dir, obj);
-+ obj->variant.file_variant.shrink_size = 0;
-+ obj->valid = 1; /* So that we don't read any other info. */
-+}
-+
-+void yaffs_link_fixup(struct yaffs_dev *dev, struct list_head *hard_list)
-+{
-+ struct list_head *lh;
-+ struct list_head *save;
-+ struct yaffs_obj *hl;
-+ struct yaffs_obj *in;
-+
-+ list_for_each_safe(lh, save, hard_list) {
-+ hl = list_entry(lh, struct yaffs_obj, hard_links);
-+ in = yaffs_find_by_number(dev,
-+ hl->variant.hardlink_variant.equiv_id);
-+
-+ if (in) {
-+ /* Add the hardlink pointers */
-+ hl->variant.hardlink_variant.equiv_obj = in;
-+ list_add(&hl->hard_links, &in->hard_links);
-+ } else {
-+ /* Todo Need to report/handle this better.
-+ * Got a problem... hardlink to a non-existant object
-+ */
-+ hl->variant.hardlink_variant.equiv_obj = NULL;
-+ INIT_LIST_HEAD(&hl->hard_links);
-+ }
-+ }
-+}
-+
-+static void yaffs_strip_deleted_objs(struct yaffs_dev *dev)
-+{
-+ /*
-+ * Sort out state of unlinked and deleted objects after scanning.
-+ */
-+ struct list_head *i;
-+ struct list_head *n;
-+ struct yaffs_obj *l;
-+
-+ if (dev->read_only)
-+ return;
-+
-+ /* Soft delete all the unlinked files */
-+ list_for_each_safe(i, n,
-+ &dev->unlinked_dir->variant.dir_variant.children) {
-+ l = list_entry(i, struct yaffs_obj, siblings);
-+ yaffs_del_obj(l);
-+ }
-+
-+ list_for_each_safe(i, n, &dev->del_dir->variant.dir_variant.children) {
-+ l = list_entry(i, struct yaffs_obj, siblings);
-+ yaffs_del_obj(l);
-+ }
-+}
-+
-+/*
-+ * This code iterates through all the objects making sure that they are rooted.
-+ * Any unrooted objects are re-rooted in lost+found.
-+ * An object needs to be in one of:
-+ * - Directly under deleted, unlinked
-+ * - Directly or indirectly under root.
-+ *
-+ * Note:
-+ * This code assumes that we don't ever change the current relationships
-+ * between directories:
-+ * root_dir->parent == unlinked_dir->parent == del_dir->parent == NULL
-+ * lost-n-found->parent == root_dir
-+ *
-+ * This fixes the problem where directories might have inadvertently been
-+ * deleted leaving the object "hanging" without being rooted in the
-+ * directory tree.
-+ */
-+
-+static int yaffs_has_null_parent(struct yaffs_dev *dev, struct yaffs_obj *obj)
-+{
-+ return (obj == dev->del_dir ||
-+ obj == dev->unlinked_dir || obj == dev->root_dir);
-+}
-+
-+static void yaffs_fix_hanging_objs(struct yaffs_dev *dev)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_obj *parent;
-+ int i;
-+ struct list_head *lh;
-+ struct list_head *n;
-+ int depth_limit;
-+ int hanging;
-+
-+ if (dev->read_only)
-+ return;
-+
-+ /* Iterate through the objects in each hash entry,
-+ * looking at each object.
-+ * Make sure it is rooted.
-+ */
-+
-+ for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
-+ list_for_each_safe(lh, n, &dev->obj_bucket[i].list) {
-+ obj = list_entry(lh, struct yaffs_obj, hash_link);
-+ parent = obj->parent;
-+
-+ if (yaffs_has_null_parent(dev, obj)) {
-+ /* These directories are not hanging */
-+ hanging = 0;
-+ } else if (!parent ||
-+ parent->variant_type !=
-+ YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ hanging = 1;
-+ } else if (yaffs_has_null_parent(dev, parent)) {
-+ hanging = 0;
-+ } else {
-+ /*
-+ * Need to follow the parent chain to
-+ * see if it is hanging.
-+ */
-+ hanging = 0;
-+ depth_limit = 100;
-+
-+ while (parent != dev->root_dir &&
-+ parent->parent &&
-+ parent->parent->variant_type ==
-+ YAFFS_OBJECT_TYPE_DIRECTORY &&
-+ depth_limit > 0) {
-+ parent = parent->parent;
-+ depth_limit--;
-+ }
-+ if (parent != dev->root_dir)
-+ hanging = 1;
-+ }
-+ if (hanging) {
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ "Hanging object %d moved to lost and found",
-+ obj->obj_id);
-+ yaffs_add_obj_to_dir(dev->lost_n_found, obj);
-+ }
-+ }
-+ }
-+}
-+
-+/*
-+ * Delete directory contents for cleaning up lost and found.
-+ */
-+static void yaffs_del_dir_contents(struct yaffs_obj *dir)
-+{
-+ struct yaffs_obj *obj;
-+ struct list_head *lh;
-+ struct list_head *n;
-+
-+ if (dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
-+ BUG();
-+
-+ list_for_each_safe(lh, n, &dir->variant.dir_variant.children) {
-+ obj = list_entry(lh, struct yaffs_obj, siblings);
-+ if (obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY)
-+ yaffs_del_dir_contents(obj);
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ "Deleting lost_found object %d",
-+ obj->obj_id);
-+ yaffs_unlink_obj(obj);
-+ }
-+}
-+
-+static void yaffs_empty_l_n_f(struct yaffs_dev *dev)
-+{
-+ yaffs_del_dir_contents(dev->lost_n_found);
-+}
-+
-+
-+struct yaffs_obj *yaffs_find_by_name(struct yaffs_obj *directory,
-+ const YCHAR *name)
-+{
-+ int sum;
-+ struct list_head *i;
-+ YCHAR buffer[YAFFS_MAX_NAME_LENGTH + 1];
-+ struct yaffs_obj *l;
-+
-+ if (!name)
-+ return NULL;
-+
-+ if (!directory) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "tragedy: yaffs_find_by_name: null pointer directory"
-+ );
-+ BUG();
-+ return NULL;
-+ }
-+ if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "tragedy: yaffs_find_by_name: non-directory"
-+ );
-+ BUG();
-+ }
-+
-+ sum = yaffs_calc_name_sum(name);
-+
-+ list_for_each(i, &directory->variant.dir_variant.children) {
-+ l = list_entry(i, struct yaffs_obj, siblings);
-+
-+ if (l->parent != directory)
-+ BUG();
-+
-+ yaffs_check_obj_details_loaded(l);
-+
-+ /* Special case for lost-n-found */
-+ if (l->obj_id == YAFFS_OBJECTID_LOSTNFOUND) {
-+ if (!strcmp(name, YAFFS_LOSTNFOUND_NAME))
-+ return l;
-+ } else if (l->sum == sum || l->hdr_chunk <= 0) {
-+ /* LostnFound chunk called Objxxx
-+ * Do a real check
-+ */
-+ yaffs_get_obj_name(l, buffer,
-+ YAFFS_MAX_NAME_LENGTH + 1);
-+ if (!strncmp(name, buffer, YAFFS_MAX_NAME_LENGTH))
-+ return l;
-+ }
-+ }
-+ return NULL;
-+}
-+
-+/* GetEquivalentObject dereferences any hard links to get to the
-+ * actual object.
-+ */
-+
-+struct yaffs_obj *yaffs_get_equivalent_obj(struct yaffs_obj *obj)
-+{
-+ if (obj && obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) {
-+ obj = obj->variant.hardlink_variant.equiv_obj;
-+ yaffs_check_obj_details_loaded(obj);
-+ }
-+ return obj;
-+}
-+
-+/*
-+ * A note or two on object names.
-+ * * If the object name is missing, we then make one up in the form objnnn
-+ *
-+ * * ASCII names are stored in the object header's name field from byte zero
-+ * * Unicode names are historically stored starting from byte zero.
-+ *
-+ * Then there are automatic Unicode names...
-+ * The purpose of these is to save names in a way that can be read as
-+ * ASCII or Unicode names as appropriate, thus allowing a Unicode and ASCII
-+ * system to share files.
-+ *
-+ * These automatic unicode are stored slightly differently...
-+ * - If the name can fit in the ASCII character space then they are saved as
-+ * ascii names as per above.
-+ * - If the name needs Unicode then the name is saved in Unicode
-+ * starting at oh->name[1].
-+
-+ */
-+static void yaffs_fix_null_name(struct yaffs_obj *obj, YCHAR *name,
-+ int buffer_size)
-+{
-+ /* Create an object name if we could not find one. */
-+ if (strnlen(name, YAFFS_MAX_NAME_LENGTH) == 0) {
-+ YCHAR local_name[20];
-+ YCHAR num_string[20];
-+ YCHAR *x = &num_string[19];
-+ unsigned v = obj->obj_id;
-+ num_string[19] = 0;
-+ while (v > 0) {
-+ x--;
-+ *x = '0' + (v % 10);
-+ v /= 10;
-+ }
-+ /* make up a name */
-+ strcpy(local_name, YAFFS_LOSTNFOUND_PREFIX);
-+ strcat(local_name, x);
-+ strncpy(name, local_name, buffer_size - 1);
-+ }
-+}
-+
-+int yaffs_get_obj_name(struct yaffs_obj *obj, YCHAR *name, int buffer_size)
-+{
-+ memset(name, 0, buffer_size * sizeof(YCHAR));
-+ yaffs_check_obj_details_loaded(obj);
-+ if (obj->obj_id == YAFFS_OBJECTID_LOSTNFOUND) {
-+ strncpy(name, YAFFS_LOSTNFOUND_NAME, buffer_size - 1);
-+ } else if (obj->short_name[0]) {
-+ strcpy(name, obj->short_name);
-+ } else if (obj->hdr_chunk > 0) {
-+ int result;
-+ u8 *buffer = yaffs_get_temp_buffer(obj->my_dev);
-+
-+ struct yaffs_obj_hdr *oh = (struct yaffs_obj_hdr *)buffer;
-+
-+ memset(buffer, 0, obj->my_dev->data_bytes_per_chunk);
-+
-+ if (obj->hdr_chunk > 0) {
-+ result = yaffs_rd_chunk_tags_nand(obj->my_dev,
-+ obj->hdr_chunk,
-+ buffer, NULL);
-+ }
-+ yaffs_load_name_from_oh(obj->my_dev, name, oh->name,
-+ buffer_size);
-+
-+ yaffs_release_temp_buffer(obj->my_dev, buffer);
-+ }
-+
-+ yaffs_fix_null_name(obj, name, buffer_size);
-+
-+ return strnlen(name, YAFFS_MAX_NAME_LENGTH);
-+}
-+
-+loff_t yaffs_get_obj_length(struct yaffs_obj *obj)
-+{
-+ /* Dereference any hard linking */
-+ obj = yaffs_get_equivalent_obj(obj);
-+
-+ if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE)
-+ return obj->variant.file_variant.file_size;
-+ if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) {
-+ if (!obj->variant.symlink_variant.alias)
-+ return 0;
-+ return strnlen(obj->variant.symlink_variant.alias,
-+ YAFFS_MAX_ALIAS_LENGTH);
-+ } else {
-+ /* Only a directory should drop through to here */
-+ return obj->my_dev->data_bytes_per_chunk;
-+ }
-+}
-+
-+int yaffs_get_obj_link_count(struct yaffs_obj *obj)
-+{
-+ int count = 0;
-+ struct list_head *i;
-+
-+ if (!obj->unlinked)
-+ count++; /* the object itself */
-+
-+ list_for_each(i, &obj->hard_links)
-+ count++; /* add the hard links; */
-+
-+ return count;
-+}
-+
-+int yaffs_get_obj_inode(struct yaffs_obj *obj)
-+{
-+ obj = yaffs_get_equivalent_obj(obj);
-+
-+ return obj->obj_id;
-+}
-+
-+unsigned yaffs_get_obj_type(struct yaffs_obj *obj)
-+{
-+ obj = yaffs_get_equivalent_obj(obj);
-+
-+ switch (obj->variant_type) {
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ return DT_REG;
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ return DT_DIR;
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ return DT_LNK;
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ return DT_REG;
-+ break;
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ if (S_ISFIFO(obj->yst_mode))
-+ return DT_FIFO;
-+ if (S_ISCHR(obj->yst_mode))
-+ return DT_CHR;
-+ if (S_ISBLK(obj->yst_mode))
-+ return DT_BLK;
-+ if (S_ISSOCK(obj->yst_mode))
-+ return DT_SOCK;
-+ return DT_REG;
-+ break;
-+ default:
-+ return DT_REG;
-+ break;
-+ }
-+}
-+
-+YCHAR *yaffs_get_symlink_alias(struct yaffs_obj *obj)
-+{
-+ obj = yaffs_get_equivalent_obj(obj);
-+ if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK)
-+ return yaffs_clone_str(obj->variant.symlink_variant.alias);
-+ else
-+ return yaffs_clone_str(_Y(""));
-+}
-+
-+/*--------------------------- Initialisation code -------------------------- */
-+
-+static int yaffs_check_dev_fns(struct yaffs_dev *dev)
-+{
-+ struct yaffs_driver *drv = &dev->drv;
-+ struct yaffs_tags_handler *tagger = &dev->tagger;
-+
-+ /* Common functions, gotta have */
-+ if (!drv->drv_read_chunk_fn ||
-+ !drv->drv_write_chunk_fn ||
-+ !drv->drv_erase_fn)
-+ return 0;
-+
-+ if (dev->param.is_yaffs2 &&
-+ (!drv->drv_mark_bad_fn || !drv->drv_check_bad_fn))
-+ return 0;
-+
-+ /* Install the default tags marshalling functions if needed. */
-+ yaffs_tags_compat_install(dev);
-+ yaffs_tags_marshall_install(dev);
-+
-+ /* Check we now have the marshalling functions required. */
-+ if (!tagger->write_chunk_tags_fn ||
-+ !tagger->read_chunk_tags_fn ||
-+ !tagger->query_block_fn ||
-+ !tagger->mark_bad_fn)
-+ return 0;
-+
-+ return 1;
-+}
-+
-+static int yaffs_create_initial_dir(struct yaffs_dev *dev)
-+{
-+ /* Initialise the unlinked, deleted, root and lost+found directories */
-+ dev->lost_n_found = dev->root_dir = NULL;
-+ dev->unlinked_dir = dev->del_dir = NULL;
-+ dev->unlinked_dir =
-+ yaffs_create_fake_dir(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR);
-+ dev->del_dir =
-+ yaffs_create_fake_dir(dev, YAFFS_OBJECTID_DELETED, S_IFDIR);
-+ dev->root_dir =
-+ yaffs_create_fake_dir(dev, YAFFS_OBJECTID_ROOT,
-+ YAFFS_ROOT_MODE | S_IFDIR);
-+ dev->lost_n_found =
-+ yaffs_create_fake_dir(dev, YAFFS_OBJECTID_LOSTNFOUND,
-+ YAFFS_LOSTNFOUND_MODE | S_IFDIR);
-+
-+ if (dev->lost_n_found && dev->root_dir && dev->unlinked_dir
-+ && dev->del_dir) {
-+ yaffs_add_obj_to_dir(dev->root_dir, dev->lost_n_found);
-+ return YAFFS_OK;
-+ }
-+ return YAFFS_FAIL;
-+}
-+
-+/* Low level init.
-+ * Typically only used by yaffs_guts_initialise, but also used by the
-+ * Low level yaffs driver tests.
-+ */
-+
-+int yaffs_guts_ll_init(struct yaffs_dev *dev)
-+{
-+
-+
-+ yaffs_trace(YAFFS_TRACE_TRACING, "yaffs: yaffs_ll_init()");
-+
-+ if (!dev) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs: Need a device"
-+ );
-+ return YAFFS_FAIL;
-+ }
-+
-+ if (dev->ll_init)
-+ return YAFFS_OK;
-+
-+ dev->internal_start_block = dev->param.start_block;
-+ dev->internal_end_block = dev->param.end_block;
-+ dev->block_offset = 0;
-+ dev->chunk_offset = 0;
-+ dev->n_free_chunks = 0;
-+
-+ dev->gc_block = 0;
-+
-+ if (dev->param.start_block == 0) {
-+ dev->internal_start_block = dev->param.start_block + 1;
-+ dev->internal_end_block = dev->param.end_block + 1;
-+ dev->block_offset = 1;
-+ dev->chunk_offset = dev->param.chunks_per_block;
-+ }
-+
-+ /* Check geometry parameters. */
-+
-+ if ((!dev->param.inband_tags && dev->param.is_yaffs2 &&
-+ dev->param.total_bytes_per_chunk < 1024) ||
-+ (!dev->param.is_yaffs2 &&
-+ dev->param.total_bytes_per_chunk < 512) ||
-+ (dev->param.inband_tags && !dev->param.is_yaffs2) ||
-+ dev->param.chunks_per_block < 2 ||
-+ dev->param.n_reserved_blocks < 2 ||
-+ dev->internal_start_block <= 0 ||
-+ dev->internal_end_block <= 0 ||
-+ dev->internal_end_block <=
-+ (dev->internal_start_block + dev->param.n_reserved_blocks + 2)
-+ ) {
-+ /* otherwise it is too small */
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "NAND geometry problems: chunk size %d, type is yaffs%s, inband_tags %d ",
-+ dev->param.total_bytes_per_chunk,
-+ dev->param.is_yaffs2 ? "2" : "",
-+ dev->param.inband_tags);
-+ return YAFFS_FAIL;
-+ }
-+
-+ /* Sort out space for inband tags, if required */
-+ if (dev->param.inband_tags)
-+ dev->data_bytes_per_chunk =
-+ dev->param.total_bytes_per_chunk -
-+ sizeof(struct yaffs_packed_tags2_tags_only);
-+ else
-+ dev->data_bytes_per_chunk = dev->param.total_bytes_per_chunk;
-+
-+ /* Got the right mix of functions? */
-+ if (!yaffs_check_dev_fns(dev)) {
-+ /* Function missing */
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "device function(s) missing or wrong");
-+
-+ return YAFFS_FAIL;
-+ }
-+
-+ if (yaffs_init_nand(dev) != YAFFS_OK) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "InitialiseNAND failed");
-+ return YAFFS_FAIL;
-+ }
-+
-+ return YAFFS_OK;
-+}
-+
-+
-+int yaffs_guts_format_dev(struct yaffs_dev *dev)
-+{
-+ int i;
-+ enum yaffs_block_state state;
-+ u32 dummy;
-+
-+ if(yaffs_guts_ll_init(dev) != YAFFS_OK)
-+ return YAFFS_FAIL;
-+
-+ if(dev->is_mounted)
-+ return YAFFS_FAIL;
-+
-+ for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
-+ yaffs_query_init_block_state(dev, i, &state, &dummy);
-+ if (state != YAFFS_BLOCK_STATE_DEAD)
-+ yaffs_erase_block(dev, i);
-+ }
-+
-+ return YAFFS_OK;
-+}
-+
-+
-+int yaffs_guts_initialise(struct yaffs_dev *dev)
-+{
-+ int init_failed = 0;
-+ unsigned x;
-+ int bits;
-+
-+ if(yaffs_guts_ll_init(dev) != YAFFS_OK)
-+ return YAFFS_FAIL;
-+
-+ if (dev->is_mounted) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "device already mounted");
-+ return YAFFS_FAIL;
-+ }
-+
-+ dev->is_mounted = 1;
-+
-+ /* OK now calculate a few things for the device */
-+
-+ /*
-+ * Calculate all the chunk size manipulation numbers:
-+ */
-+ x = dev->data_bytes_per_chunk;
-+ /* We always use dev->chunk_shift and dev->chunk_div */
-+ dev->chunk_shift = calc_shifts(x);
-+ x >>= dev->chunk_shift;
-+ dev->chunk_div = x;
-+ /* We only use chunk mask if chunk_div is 1 */
-+ dev->chunk_mask = (1 << dev->chunk_shift) - 1;
-+
-+ /*
-+ * Calculate chunk_grp_bits.
-+ * We need to find the next power of 2 > than internal_end_block
-+ */
-+
-+ x = dev->param.chunks_per_block * (dev->internal_end_block + 1);
-+
-+ bits = calc_shifts_ceiling(x);
-+
-+ /* Set up tnode width if wide tnodes are enabled. */
-+ if (!dev->param.wide_tnodes_disabled) {
-+ /* bits must be even so that we end up with 32-bit words */
-+ if (bits & 1)
-+ bits++;
-+ if (bits < 16)
-+ dev->tnode_width = 16;
-+ else
-+ dev->tnode_width = bits;
-+ } else {
-+ dev->tnode_width = 16;
-+ }
-+
-+ dev->tnode_mask = (1 << dev->tnode_width) - 1;
-+
-+ /* Level0 Tnodes are 16 bits or wider (if wide tnodes are enabled),
-+ * so if the bitwidth of the
-+ * chunk range we're using is greater than 16 we need
-+ * to figure out chunk shift and chunk_grp_size
-+ */
-+
-+ if (bits <= dev->tnode_width)
-+ dev->chunk_grp_bits = 0;
-+ else
-+ dev->chunk_grp_bits = bits - dev->tnode_width;
-+
-+ dev->tnode_size = (dev->tnode_width * YAFFS_NTNODES_LEVEL0) / 8;
-+ if (dev->tnode_size < sizeof(struct yaffs_tnode))
-+ dev->tnode_size = sizeof(struct yaffs_tnode);
-+
-+ dev->chunk_grp_size = 1 << dev->chunk_grp_bits;
-+
-+ if (dev->param.chunks_per_block < dev->chunk_grp_size) {
-+ /* We have a problem because the soft delete won't work if
-+ * the chunk group size > chunks per block.
-+ * This can be remedied by using larger "virtual blocks".
-+ */
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "chunk group too large");
-+
-+ return YAFFS_FAIL;
-+ }
-+
-+ /* Finished verifying the device, continue with initialisation */
-+
-+ /* More device initialisation */
-+ dev->all_gcs = 0;
-+ dev->passive_gc_count = 0;
-+ dev->oldest_dirty_gc_count = 0;
-+ dev->bg_gcs = 0;
-+ dev->gc_block_finder = 0;
-+ dev->buffered_block = -1;
-+ dev->doing_buffered_block_rewrite = 0;
-+ dev->n_deleted_files = 0;
-+ dev->n_bg_deletions = 0;
-+ dev->n_unlinked_files = 0;
-+ dev->n_ecc_fixed = 0;
-+ dev->n_ecc_unfixed = 0;
-+ dev->n_tags_ecc_fixed = 0;
-+ dev->n_tags_ecc_unfixed = 0;
-+ dev->n_erase_failures = 0;
-+ dev->n_erased_blocks = 0;
-+ dev->gc_disable = 0;
-+ dev->has_pending_prioritised_gc = 1;
-+ /* Assume the worst for now, will get fixed on first GC */
-+ INIT_LIST_HEAD(&dev->dirty_dirs);
-+ dev->oldest_dirty_seq = 0;
-+ dev->oldest_dirty_block = 0;
-+
-+ /* Initialise temporary buffers and caches. */
-+ if (!yaffs_init_tmp_buffers(dev))
-+ init_failed = 1;
-+
-+ dev->cache = NULL;
-+ dev->gc_cleanup_list = NULL;
-+
-+ if (!init_failed && dev->param.n_caches > 0) {
-+ int i;
-+ void *buf;
-+ int cache_bytes =
-+ dev->param.n_caches * sizeof(struct yaffs_cache);
-+
-+ if (dev->param.n_caches > YAFFS_MAX_SHORT_OP_CACHES)
-+ dev->param.n_caches = YAFFS_MAX_SHORT_OP_CACHES;
-+
-+ dev->cache = kmalloc(cache_bytes, GFP_NOFS);
-+
-+ buf = (u8 *) dev->cache;
-+
-+ if (dev->cache)
-+ memset(dev->cache, 0, cache_bytes);
-+
-+ for (i = 0; i < dev->param.n_caches && buf; i++) {
-+ dev->cache[i].object = NULL;
-+ dev->cache[i].last_use = 0;
-+ dev->cache[i].dirty = 0;
-+ dev->cache[i].data = buf =
-+ kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS);
-+ }
-+ if (!buf)
-+ init_failed = 1;
-+
-+ dev->cache_last_use = 0;
-+ }
-+
-+ dev->cache_hits = 0;
-+
-+ if (!init_failed) {
-+ dev->gc_cleanup_list =
-+ kmalloc(dev->param.chunks_per_block * sizeof(u32),
-+ GFP_NOFS);
-+ if (!dev->gc_cleanup_list)
-+ init_failed = 1;
-+ }
-+
-+ if (dev->param.is_yaffs2)
-+ dev->param.use_header_file_size = 1;
-+
-+ if (!init_failed && !yaffs_init_blocks(dev))
-+ init_failed = 1;
-+
-+ yaffs_init_tnodes_and_objs(dev);
-+
-+ if (!init_failed && !yaffs_create_initial_dir(dev))
-+ init_failed = 1;
-+
-+ if (!init_failed && dev->param.is_yaffs2 &&
-+ !dev->param.disable_summary &&
-+ !yaffs_summary_init(dev))
-+ init_failed = 1;
-+
-+ if (!init_failed) {
-+ /* Now scan the flash. */
-+ if (dev->param.is_yaffs2) {
-+ if (yaffs2_checkpt_restore(dev)) {
-+ yaffs_check_obj_details_loaded(dev->root_dir);
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT |
-+ YAFFS_TRACE_MOUNT,
-+ "yaffs: restored from checkpoint"
-+ );
-+ } else {
-+
-+ /* Clean up the mess caused by an aborted
-+ * checkpoint load then scan backwards.
-+ */
-+ yaffs_deinit_blocks(dev);
-+
-+ yaffs_deinit_tnodes_and_objs(dev);
-+
-+ dev->n_erased_blocks = 0;
-+ dev->n_free_chunks = 0;
-+ dev->alloc_block = -1;
-+ dev->alloc_page = -1;
-+ dev->n_deleted_files = 0;
-+ dev->n_unlinked_files = 0;
-+ dev->n_bg_deletions = 0;
-+
-+ if (!init_failed && !yaffs_init_blocks(dev))
-+ init_failed = 1;
-+
-+ yaffs_init_tnodes_and_objs(dev);
-+
-+ if (!init_failed
-+ && !yaffs_create_initial_dir(dev))
-+ init_failed = 1;
-+
-+ if (!init_failed && !yaffs2_scan_backwards(dev))
-+ init_failed = 1;
-+ }
-+ } else if (!yaffs1_scan(dev)) {
-+ init_failed = 1;
-+ }
-+
-+ yaffs_strip_deleted_objs(dev);
-+ yaffs_fix_hanging_objs(dev);
-+ if (dev->param.empty_lost_n_found)
-+ yaffs_empty_l_n_f(dev);
-+ }
-+
-+ if (init_failed) {
-+ /* Clean up the mess */
-+ yaffs_trace(YAFFS_TRACE_TRACING,
-+ "yaffs: yaffs_guts_initialise() aborted.");
-+
-+ yaffs_deinitialise(dev);
-+ return YAFFS_FAIL;
-+ }
-+
-+ /* Zero out stats */
-+ dev->n_page_reads = 0;
-+ dev->n_page_writes = 0;
-+ dev->n_erasures = 0;
-+ dev->n_gc_copies = 0;
-+ dev->n_retried_writes = 0;
-+
-+ dev->n_retired_blocks = 0;
-+
-+ yaffs_verify_free_chunks(dev);
-+ yaffs_verify_blocks(dev);
-+
-+ /* Clean up any aborted checkpoint data */
-+ if (!dev->is_checkpointed && dev->blocks_in_checkpt > 0)
-+ yaffs2_checkpt_invalidate(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_TRACING,
-+ "yaffs: yaffs_guts_initialise() done.");
-+ return YAFFS_OK;
-+}
-+
-+void yaffs_deinitialise(struct yaffs_dev *dev)
-+{
-+ if (dev->is_mounted) {
-+ int i;
-+
-+ yaffs_deinit_blocks(dev);
-+ yaffs_deinit_tnodes_and_objs(dev);
-+ yaffs_summary_deinit(dev);
-+
-+ if (dev->param.n_caches > 0 && dev->cache) {
-+
-+ for (i = 0; i < dev->param.n_caches; i++) {
-+ kfree(dev->cache[i].data);
-+ dev->cache[i].data = NULL;
-+ }
-+
-+ kfree(dev->cache);
-+ dev->cache = NULL;
-+ }
-+
-+ kfree(dev->gc_cleanup_list);
-+
-+ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
-+ kfree(dev->temp_buffer[i].buffer);
-+
-+ dev->is_mounted = 0;
-+
-+ yaffs_deinit_nand(dev);
-+ }
-+}
-+
-+int yaffs_count_free_chunks(struct yaffs_dev *dev)
-+{
-+ int n_free = 0;
-+ int b;
-+ struct yaffs_block_info *blk;
-+
-+ blk = dev->block_info;
-+ for (b = dev->internal_start_block; b <= dev->internal_end_block; b++) {
-+ switch (blk->block_state) {
-+ case YAFFS_BLOCK_STATE_EMPTY:
-+ case YAFFS_BLOCK_STATE_ALLOCATING:
-+ case YAFFS_BLOCK_STATE_COLLECTING:
-+ case YAFFS_BLOCK_STATE_FULL:
-+ n_free +=
-+ (dev->param.chunks_per_block - blk->pages_in_use +
-+ blk->soft_del_pages);
-+ break;
-+ default:
-+ break;
-+ }
-+ blk++;
-+ }
-+ return n_free;
-+}
-+
-+int yaffs_get_n_free_chunks(struct yaffs_dev *dev)
-+{
-+ /* This is what we report to the outside world */
-+ int n_free;
-+ int n_dirty_caches;
-+ int blocks_for_checkpt;
-+ int i;
-+
-+ n_free = dev->n_free_chunks;
-+ n_free += dev->n_deleted_files;
-+
-+ /* Now count and subtract the number of dirty chunks in the cache. */
-+
-+ for (n_dirty_caches = 0, i = 0; i < dev->param.n_caches; i++) {
-+ if (dev->cache[i].dirty)
-+ n_dirty_caches++;
-+ }
-+
-+ n_free -= n_dirty_caches;
-+
-+ n_free -=
-+ ((dev->param.n_reserved_blocks + 1) * dev->param.chunks_per_block);
-+
-+ /* Now figure checkpoint space and report that... */
-+ blocks_for_checkpt = yaffs_calc_checkpt_blocks_required(dev);
-+
-+ n_free -= (blocks_for_checkpt * dev->param.chunks_per_block);
-+
-+ if (n_free < 0)
-+ n_free = 0;
-+
-+ return n_free;
-+}
-+
-+
-+
-+/*
-+ * Marshalling functions to get loff_t file sizes into and out of
-+ * object headers.
-+ */
-+void yaffs_oh_size_load(struct yaffs_obj_hdr *oh, loff_t fsize)
-+{
-+ oh->file_size_low = (fsize & 0xFFFFFFFF);
-+ oh->file_size_high = ((fsize >> 32) & 0xFFFFFFFF);
-+}
-+
-+loff_t yaffs_oh_to_size(struct yaffs_obj_hdr *oh)
-+{
-+ loff_t retval;
-+
-+ if (sizeof(loff_t) >= 8 && ~(oh->file_size_high))
-+ retval = (((loff_t) oh->file_size_high) << 32) |
-+ (((loff_t) oh->file_size_low) & 0xFFFFFFFF);
-+ else
-+ retval = (loff_t) oh->file_size_low;
-+
-+ return retval;
-+}
-+
-+
-+void yaffs_count_blocks_by_state(struct yaffs_dev *dev, int bs[10])
-+{
-+ int i;
-+ struct yaffs_block_info *bi;
-+ int s;
-+
-+ for(i = 0; i < 10; i++)
-+ bs[i] = 0;
-+
-+ for(i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
-+ bi = yaffs_get_block_info(dev, i);
-+ s = bi->block_state;
-+ if(s > YAFFS_BLOCK_STATE_DEAD || s < YAFFS_BLOCK_STATE_UNKNOWN)
-+ bs[0]++;
-+ else
-+ bs[s]++;
-+ }
-+}
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_guts.h linux-3.4.90/fs/yaffs2/yaffs_guts.h
---- linux-3.4.90.orig/fs/yaffs2/yaffs_guts.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_guts.h 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,1007 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_GUTS_H__
-+#define __YAFFS_GUTS_H__
-+
-+#include "yportenv.h"
-+
-+#define YAFFS_OK 1
-+#define YAFFS_FAIL 0
-+
-+/* Give us a Y=0x59,
-+ * Give us an A=0x41,
-+ * Give us an FF=0xff
-+ * Give us an S=0x53
-+ * And what have we got...
-+ */
-+#define YAFFS_MAGIC 0x5941ff53
-+
-+/*
-+ * Tnodes form a tree with the tnodes in "levels"
-+ * Levels greater than 0 hold 8 slots which point to other tnodes.
-+ * Those at level 0 hold 16 slots which point to chunks in NAND.
-+ *
-+ * A maximum level of 8 thust supports files of size up to:
-+ *
-+ * 2^(3*MAX_LEVEL+4)
-+ *
-+ * Thus a max level of 8 supports files with up to 2^^28 chunks which gives
-+ * a maximum file size of around 512Gbytees with 2k chunks.
-+ */
-+#define YAFFS_NTNODES_LEVEL0 16
-+#define YAFFS_TNODES_LEVEL0_BITS 4
-+#define YAFFS_TNODES_LEVEL0_MASK 0xf
-+
-+#define YAFFS_NTNODES_INTERNAL (YAFFS_NTNODES_LEVEL0 / 2)
-+#define YAFFS_TNODES_INTERNAL_BITS (YAFFS_TNODES_LEVEL0_BITS - 1)
-+#define YAFFS_TNODES_INTERNAL_MASK 0x7
-+#define YAFFS_TNODES_MAX_LEVEL 8
-+#define YAFFS_TNODES_MAX_BITS (YAFFS_TNODES_LEVEL0_BITS + \
-+ YAFFS_TNODES_INTERNAL_BITS * \
-+ YAFFS_TNODES_MAX_LEVEL)
-+#define YAFFS_MAX_CHUNK_ID ((1 << YAFFS_TNODES_MAX_BITS) - 1)
-+
-+#define YAFFS_MAX_FILE_SIZE_32 0x7fffffff
-+
-+/* Constants for YAFFS1 mode */
-+#define YAFFS_BYTES_PER_SPARE 16
-+#define YAFFS_BYTES_PER_CHUNK 512
-+#define YAFFS_CHUNK_SIZE_SHIFT 9
-+#define YAFFS_CHUNKS_PER_BLOCK 32
-+#define YAFFS_BYTES_PER_BLOCK (YAFFS_CHUNKS_PER_BLOCK*YAFFS_BYTES_PER_CHUNK)
-+
-+#define YAFFS_MIN_YAFFS2_CHUNK_SIZE 1024
-+#define YAFFS_MIN_YAFFS2_SPARE_SIZE 32
-+
-+
-+
-+#define YAFFS_ALLOCATION_NOBJECTS 100
-+#define YAFFS_ALLOCATION_NTNODES 100
-+#define YAFFS_ALLOCATION_NLINKS 100
-+
-+#define YAFFS_NOBJECT_BUCKETS 256
-+
-+#define YAFFS_OBJECT_SPACE 0x40000
-+#define YAFFS_MAX_OBJECT_ID (YAFFS_OBJECT_SPACE - 1)
-+
-+/* Binary data version stamps */
-+#define YAFFS_SUMMARY_VERSION 1
-+#define YAFFS_CHECKPOINT_VERSION 7
-+
-+#ifdef CONFIG_YAFFS_UNICODE
-+#define YAFFS_MAX_NAME_LENGTH 127
-+#define YAFFS_MAX_ALIAS_LENGTH 79
-+#else
-+#define YAFFS_MAX_NAME_LENGTH 255
-+#define YAFFS_MAX_ALIAS_LENGTH 159
-+#endif
-+
-+#define YAFFS_SHORT_NAME_LENGTH 15
-+
-+/* Some special object ids for pseudo objects */
-+#define YAFFS_OBJECTID_ROOT 1
-+#define YAFFS_OBJECTID_LOSTNFOUND 2
-+#define YAFFS_OBJECTID_UNLINKED 3
-+#define YAFFS_OBJECTID_DELETED 4
-+
-+/* Fake object Id for summary data */
-+#define YAFFS_OBJECTID_SUMMARY 0x10
-+
-+/* Pseudo object ids for checkpointing */
-+#define YAFFS_OBJECTID_CHECKPOINT_DATA 0x20
-+#define YAFFS_SEQUENCE_CHECKPOINT_DATA 0x21
-+
-+#define YAFFS_MAX_SHORT_OP_CACHES 20
-+
-+#define YAFFS_N_TEMP_BUFFERS 6
-+
-+/* We limit the number attempts at sucessfully saving a chunk of data.
-+ * Small-page devices have 32 pages per block; large-page devices have 64.
-+ * Default to something in the order of 5 to 10 blocks worth of chunks.
-+ */
-+#define YAFFS_WR_ATTEMPTS (5*64)
-+
-+/* Sequence numbers are used in YAFFS2 to determine block allocation order.
-+ * The range is limited slightly to help distinguish bad numbers from good.
-+ * This also allows us to perhaps in the future use special numbers for
-+ * special purposes.
-+ * EFFFFF00 allows the allocation of 8 blocks/second (~1Mbytes) for 15 years,
-+ * and is a larger number than the lifetime of a 2GB device.
-+ */
-+#define YAFFS_LOWEST_SEQUENCE_NUMBER 0x00001000
-+#define YAFFS_HIGHEST_SEQUENCE_NUMBER 0xefffff00
-+
-+/* Special sequence number for bad block that failed to be marked bad */
-+#define YAFFS_SEQUENCE_BAD_BLOCK 0xffff0000
-+
-+/* ChunkCache is used for short read/write operations.*/
-+struct yaffs_cache {
-+ struct yaffs_obj *object;
-+ int chunk_id;
-+ int last_use;
-+ int dirty;
-+ int n_bytes; /* Only valid if the cache is dirty */
-+ int locked; /* Can't push out or flush while locked. */
-+ u8 *data;
-+};
-+
-+/* yaffs1 tags structures in RAM
-+ * NB This uses bitfield. Bitfields should not straddle a u32 boundary
-+ * otherwise the structure size will get blown out.
-+ */
-+
-+struct yaffs_tags {
-+ u32 chunk_id:20;
-+ u32 serial_number:2;
-+ u32 n_bytes_lsb:10;
-+ u32 obj_id:18;
-+ u32 ecc:12;
-+ u32 n_bytes_msb:2;
-+};
-+
-+union yaffs_tags_union {
-+ struct yaffs_tags as_tags;
-+ u8 as_bytes[8];
-+};
-+
-+
-+/* Stuff used for extended tags in YAFFS2 */
-+
-+enum yaffs_ecc_result {
-+ YAFFS_ECC_RESULT_UNKNOWN,
-+ YAFFS_ECC_RESULT_NO_ERROR,
-+ YAFFS_ECC_RESULT_FIXED,
-+ YAFFS_ECC_RESULT_UNFIXED
-+};
-+
-+enum yaffs_obj_type {
-+ YAFFS_OBJECT_TYPE_UNKNOWN,
-+ YAFFS_OBJECT_TYPE_FILE,
-+ YAFFS_OBJECT_TYPE_SYMLINK,
-+ YAFFS_OBJECT_TYPE_DIRECTORY,
-+ YAFFS_OBJECT_TYPE_HARDLINK,
-+ YAFFS_OBJECT_TYPE_SPECIAL
-+};
-+
-+#define YAFFS_OBJECT_TYPE_MAX YAFFS_OBJECT_TYPE_SPECIAL
-+
-+struct yaffs_ext_tags {
-+ unsigned chunk_used; /* Status of the chunk: used or unused */
-+ unsigned obj_id; /* If 0 this is not used */
-+ unsigned chunk_id; /* If 0 this is a header, else a data chunk */
-+ unsigned n_bytes; /* Only valid for data chunks */
-+
-+ /* The following stuff only has meaning when we read */
-+ enum yaffs_ecc_result ecc_result;
-+ unsigned block_bad;
-+
-+ /* YAFFS 1 stuff */
-+ unsigned is_deleted; /* The chunk is marked deleted */
-+ unsigned serial_number; /* Yaffs1 2-bit serial number */
-+
-+ /* YAFFS2 stuff */
-+ unsigned seq_number; /* The sequence number of this block */
-+
-+ /* Extra info if this is an object header (YAFFS2 only) */
-+
-+ unsigned extra_available; /* Extra info available if not zero */
-+ unsigned extra_parent_id; /* The parent object */
-+ unsigned extra_is_shrink; /* Is it a shrink header? */
-+ unsigned extra_shadows; /* Does this shadow another object? */
-+
-+ enum yaffs_obj_type extra_obj_type; /* What object type? */
-+
-+ loff_t extra_file_size; /* Length if it is a file */
-+ unsigned extra_equiv_id; /* Equivalent object for a hard link */
-+};
-+
-+/* Spare structure for YAFFS1 */
-+struct yaffs_spare {
-+ u8 tb0;
-+ u8 tb1;
-+ u8 tb2;
-+ u8 tb3;
-+ u8 page_status; /* set to 0 to delete the chunk */
-+ u8 block_status;
-+ u8 tb4;
-+ u8 tb5;
-+ u8 ecc1[3];
-+ u8 tb6;
-+ u8 tb7;
-+ u8 ecc2[3];
-+};
-+
-+/*Special structure for passing through to mtd */
-+struct yaffs_nand_spare {
-+ struct yaffs_spare spare;
-+ int eccres1;
-+ int eccres2;
-+};
-+
-+/* Block data in RAM */
-+
-+enum yaffs_block_state {
-+ YAFFS_BLOCK_STATE_UNKNOWN = 0,
-+
-+ YAFFS_BLOCK_STATE_SCANNING,
-+ /* Being scanned */
-+
-+ YAFFS_BLOCK_STATE_NEEDS_SCAN,
-+ /* The block might have something on it (ie it is allocating or full,
-+ * perhaps empty) but it needs to be scanned to determine its true
-+ * state.
-+ * This state is only valid during scanning.
-+ * NB We tolerate empty because the pre-scanner might be incapable of
-+ * deciding
-+ * However, if this state is returned on a YAFFS2 device,
-+ * then we expect a sequence number
-+ */
-+
-+ YAFFS_BLOCK_STATE_EMPTY,
-+ /* This block is empty */
-+
-+ YAFFS_BLOCK_STATE_ALLOCATING,
-+ /* This block is partially allocated.
-+ * At least one page holds valid data.
-+ * This is the one currently being used for page
-+ * allocation. Should never be more than one of these.
-+ * If a block is only partially allocated at mount it is treated as
-+ * full.
-+ */
-+
-+ YAFFS_BLOCK_STATE_FULL,
-+ /* All the pages in this block have been allocated.
-+ * If a block was only partially allocated when mounted we treat
-+ * it as fully allocated.
-+ */
-+
-+ YAFFS_BLOCK_STATE_DIRTY,
-+ /* The block was full and now all chunks have been deleted.
-+ * Erase me, reuse me.
-+ */
-+
-+ YAFFS_BLOCK_STATE_CHECKPOINT,
-+ /* This block is assigned to holding checkpoint data. */
-+
-+ YAFFS_BLOCK_STATE_COLLECTING,
-+ /* This block is being garbage collected */
-+
-+ YAFFS_BLOCK_STATE_DEAD
-+ /* This block has failed and is not in use */
-+};
-+
-+#define YAFFS_NUMBER_OF_BLOCK_STATES (YAFFS_BLOCK_STATE_DEAD + 1)
-+
-+struct yaffs_block_info {
-+
-+ s32 soft_del_pages:10; /* number of soft deleted pages */
-+ s32 pages_in_use:10; /* number of pages in use */
-+ u32 block_state:4; /* One of the above block states. */
-+ /* NB use unsigned because enum is sometimes
-+ * an int */
-+ u32 needs_retiring:1; /* Data has failed on this block, */
-+ /*need to get valid data off and retire*/
-+ u32 skip_erased_check:1;/* Skip the erased check on this block */
-+ u32 gc_prioritise:1; /* An ECC check or blank check has failed.
-+ Block should be prioritised for GC */
-+ u32 chunk_error_strikes:3; /* How many times we've had ecc etc
-+ failures on this block and tried to reuse it */
-+ u32 has_summary:1; /* The block has a summary */
-+
-+ u32 has_shrink_hdr:1; /* This block has at least one shrink header */
-+ u32 seq_number; /* block sequence number for yaffs2 */
-+
-+};
-+
-+/* -------------------------- Object structure -------------------------------*/
-+/* This is the object structure as stored on NAND */
-+
-+struct yaffs_obj_hdr {
-+ enum yaffs_obj_type type;
-+
-+ /* Apply to everything */
-+ int parent_obj_id;
-+ u16 sum_no_longer_used; /* checksum of name. No longer used */
-+ YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
-+
-+ /* The following apply to all object types except for hard links */
-+ u32 yst_mode; /* protection */
-+
-+ u32 yst_uid;
-+ u32 yst_gid;
-+ u32 yst_atime;
-+ u32 yst_mtime;
-+ u32 yst_ctime;
-+
-+ /* File size applies to files only */
-+ u32 file_size_low;
-+
-+ /* Equivalent object id applies to hard links only. */
-+ int equiv_id;
-+
-+ /* Alias is for symlinks only. */
-+ YCHAR alias[YAFFS_MAX_ALIAS_LENGTH + 1];
-+
-+ u32 yst_rdev; /* stuff for block and char devices (major/min) */
-+
-+ u32 win_ctime[2];
-+ u32 win_atime[2];
-+ u32 win_mtime[2];
-+
-+ u32 inband_shadowed_obj_id;
-+ u32 inband_is_shrink;
-+
-+ u32 file_size_high;
-+ u32 reserved[1];
-+ int shadows_obj; /* This object header shadows the
-+ specified object if > 0 */
-+
-+ /* is_shrink applies to object headers written when wemake a hole. */
-+ u32 is_shrink;
-+
-+};
-+
-+/*--------------------------- Tnode -------------------------- */
-+
-+struct yaffs_tnode {
-+ struct yaffs_tnode *internal[YAFFS_NTNODES_INTERNAL];
-+};
-+
-+/*------------------------ Object -----------------------------*/
-+/* An object can be one of:
-+ * - a directory (no data, has children links
-+ * - a regular file (data.... not prunes :->).
-+ * - a symlink [symbolic link] (the alias).
-+ * - a hard link
-+ */
-+
-+struct yaffs_file_var {
-+ loff_t file_size;
-+ loff_t scanned_size;
-+ loff_t shrink_size;
-+ int top_level;
-+ struct yaffs_tnode *top;
-+};
-+
-+struct yaffs_dir_var {
-+ struct list_head children; /* list of child links */
-+ struct list_head dirty; /* Entry for list of dirty directories */
-+};
-+
-+struct yaffs_symlink_var {
-+ YCHAR *alias;
-+};
-+
-+struct yaffs_hardlink_var {
-+ struct yaffs_obj *equiv_obj;
-+ u32 equiv_id;
-+};
-+
-+union yaffs_obj_var {
-+ struct yaffs_file_var file_variant;
-+ struct yaffs_dir_var dir_variant;
-+ struct yaffs_symlink_var symlink_variant;
-+ struct yaffs_hardlink_var hardlink_variant;
-+};
-+
-+struct yaffs_obj {
-+ u8 deleted:1; /* This should only apply to unlinked files. */
-+ u8 soft_del:1; /* it has also been soft deleted */
-+ u8 unlinked:1; /* An unlinked file.*/
-+ u8 fake:1; /* A fake object has no presence on NAND. */
-+ u8 rename_allowed:1; /* Some objects cannot be renamed. */
-+ u8 unlink_allowed:1;
-+ u8 dirty:1; /* the object needs to be written to flash */
-+ u8 valid:1; /* When the file system is being loaded up, this
-+ * object might be created before the data
-+ * is available
-+ * ie. file data chunks encountered before
-+ * the header.
-+ */
-+ u8 lazy_loaded:1; /* This object has been lazy loaded and
-+ * is missing some detail */
-+
-+ u8 defered_free:1; /* Object is removed from NAND, but is
-+ * still in the inode cache.
-+ * Free of object is defered.
-+ * until the inode is released.
-+ */
-+ u8 being_created:1; /* This object is still being created
-+ * so skip some verification checks. */
-+ u8 is_shadowed:1; /* This object is shadowed on the way
-+ * to being renamed. */
-+
-+ u8 xattr_known:1; /* We know if this has object has xattribs
-+ * or not. */
-+ u8 has_xattr:1; /* This object has xattribs.
-+ * Only valid if xattr_known. */
-+
-+ u8 serial; /* serial number of chunk in NAND.*/
-+ u16 sum; /* sum of the name to speed searching */
-+
-+ struct yaffs_dev *my_dev; /* The device I'm on */
-+
-+ struct list_head hash_link; /* list of objects in hash bucket */
-+
-+ struct list_head hard_links; /* hard linked object chain*/
-+
-+ /* directory structure stuff */
-+ /* also used for linking up the free list */
-+ struct yaffs_obj *parent;
-+ struct list_head siblings;
-+
-+ /* Where's my object header in NAND? */
-+ int hdr_chunk;
-+
-+ int n_data_chunks; /* Number of data chunks for this file. */
-+
-+ u32 obj_id; /* the object id value */
-+
-+ u32 yst_mode;
-+
-+ YCHAR short_name[YAFFS_SHORT_NAME_LENGTH + 1];
-+
-+#ifdef CONFIG_YAFFS_WINCE
-+ u32 win_ctime[2];
-+ u32 win_mtime[2];
-+ u32 win_atime[2];
-+#else
-+ u32 yst_uid;
-+ u32 yst_gid;
-+ u32 yst_atime;
-+ u32 yst_mtime;
-+ u32 yst_ctime;
-+#endif
-+
-+ u32 yst_rdev;
-+
-+ void *my_inode;
-+
-+ enum yaffs_obj_type variant_type;
-+
-+ union yaffs_obj_var variant;
-+
-+};
-+
-+struct yaffs_obj_bucket {
-+ struct list_head list;
-+ int count;
-+};
-+
-+/* yaffs_checkpt_obj holds the definition of an object as dumped
-+ * by checkpointing.
-+ */
-+
-+struct yaffs_checkpt_obj {
-+ int struct_type;
-+ u32 obj_id;
-+ u32 parent_id;
-+ int hdr_chunk;
-+ enum yaffs_obj_type variant_type:3;
-+ u8 deleted:1;
-+ u8 soft_del:1;
-+ u8 unlinked:1;
-+ u8 fake:1;
-+ u8 rename_allowed:1;
-+ u8 unlink_allowed:1;
-+ u8 serial;
-+ int n_data_chunks;
-+ loff_t size_or_equiv_obj;
-+};
-+
-+/*--------------------- Temporary buffers ----------------
-+ *
-+ * These are chunk-sized working buffers. Each device has a few.
-+ */
-+
-+struct yaffs_buffer {
-+ u8 *buffer;
-+ int in_use;
-+};
-+
-+/*----------------- Device ---------------------------------*/
-+
-+struct yaffs_param {
-+ const YCHAR *name;
-+
-+ /*
-+ * Entry parameters set up way early. Yaffs sets up the rest.
-+ * The structure should be zeroed out before use so that unused
-+ * and default values are zero.
-+ */
-+
-+ int inband_tags; /* Use unband tags */
-+ u32 total_bytes_per_chunk; /* Should be >= 512, does not need to
-+ be a power of 2 */
-+ int chunks_per_block; /* does not need to be a power of 2 */
-+ int spare_bytes_per_chunk; /* spare area size */
-+ int start_block; /* Start block we're allowed to use */
-+ int end_block; /* End block we're allowed to use */
-+ int n_reserved_blocks; /* Tuneable so that we can reduce
-+ * reserved blocks on NOR and RAM. */
-+
-+ int n_caches; /* If <= 0, then short op caching is disabled,
-+ * else the number of short op caches.
-+ */
-+ int cache_bypass_aligned; /* If non-zero then bypass the cache for
-+ * aligned writes.
-+ */
-+
-+ int use_nand_ecc; /* Flag to decide whether or not to use
-+ * NAND driver ECC on data (yaffs1) */
-+ int tags_9bytes; /* Use 9 byte tags */
-+ int no_tags_ecc; /* Flag to decide whether or not to do ECC
-+ * on packed tags (yaffs2) */
-+
-+ int is_yaffs2; /* Use yaffs2 mode on this device */
-+
-+ int empty_lost_n_found; /* Auto-empty lost+found directory on mount */
-+
-+ int refresh_period; /* How often to check for a block refresh */
-+
-+ /* Checkpoint control. Can be set before or after initialisation */
-+ u8 skip_checkpt_rd;
-+ u8 skip_checkpt_wr;
-+
-+ int enable_xattr; /* Enable xattribs */
-+
-+ int max_objects; /*
-+ * Set to limit the number of objects created.
-+ * 0 = no limit.
-+ */
-+
-+ /* The remove_obj_fn function must be supplied by OS flavours that
-+ * need it.
-+ * yaffs direct uses it to implement the faster readdir.
-+ * Linux uses it to protect the directory during unlocking.
-+ */
-+ void (*remove_obj_fn) (struct yaffs_obj *obj);
-+
-+ /* Callback to mark the superblock dirty */
-+ void (*sb_dirty_fn) (struct yaffs_dev *dev);
-+
-+ /* Callback to control garbage collection. */
-+ unsigned (*gc_control_fn) (struct yaffs_dev *dev);
-+
-+ /* Debug control flags. Don't use unless you know what you're doing */
-+ int use_header_file_size; /* Flag to determine if we should use
-+ * file sizes from the header */
-+ int disable_lazy_load; /* Disable lazy loading on this device */
-+ int wide_tnodes_disabled; /* Set to disable wide tnodes */
-+ int disable_soft_del; /* yaffs 1 only: Set to disable the use of
-+ * softdeletion. */
-+
-+ int defered_dir_update; /* Set to defer directory updates */
-+
-+#ifdef CONFIG_YAFFS_AUTO_UNICODE
-+ int auto_unicode;
-+#endif
-+ int always_check_erased; /* Force chunk erased check always on */
-+
-+ int disable_summary;
-+ int disable_bad_block_marking;
-+
-+};
-+
-+struct yaffs_driver {
-+ int (*drv_write_chunk_fn) (struct yaffs_dev *dev, int nand_chunk,
-+ const u8 *data, int data_len,
-+ const u8 *oob, int oob_len);
-+ int (*drv_read_chunk_fn) (struct yaffs_dev *dev, int nand_chunk,
-+ u8 *data, int data_len,
-+ u8 *oob, int oob_len,
-+ enum yaffs_ecc_result *ecc_result);
-+ int (*drv_erase_fn) (struct yaffs_dev *dev, int block_no);
-+ int (*drv_mark_bad_fn) (struct yaffs_dev *dev, int block_no);
-+ int (*drv_check_bad_fn) (struct yaffs_dev *dev, int block_no);
-+ int (*drv_initialise_fn) (struct yaffs_dev *dev);
-+ int (*drv_deinitialise_fn) (struct yaffs_dev *dev);
-+};
-+
-+struct yaffs_tags_handler {
-+ int (*write_chunk_tags_fn) (struct yaffs_dev *dev,
-+ int nand_chunk, const u8 *data,
-+ const struct yaffs_ext_tags *tags);
-+ int (*read_chunk_tags_fn) (struct yaffs_dev *dev,
-+ int nand_chunk, u8 *data,
-+ struct yaffs_ext_tags *tags);
-+
-+ int (*query_block_fn) (struct yaffs_dev *dev, int block_no,
-+ enum yaffs_block_state *state,
-+ u32 *seq_number);
-+ int (*mark_bad_fn) (struct yaffs_dev *dev, int block_no);
-+};
-+
-+struct yaffs_dev {
-+ struct yaffs_param param;
-+ struct yaffs_driver drv;
-+ struct yaffs_tags_handler tagger;
-+
-+ /* Context storage. Holds extra OS specific data for this device */
-+
-+ void *os_context;
-+ void *driver_context;
-+
-+ struct list_head dev_list;
-+
-+ int ll_init;
-+ /* Runtime parameters. Set up by YAFFS. */
-+ int data_bytes_per_chunk;
-+
-+ /* Non-wide tnode stuff */
-+ u16 chunk_grp_bits; /* Number of bits that need to be resolved if
-+ * the tnodes are not wide enough.
-+ */
-+ u16 chunk_grp_size; /* == 2^^chunk_grp_bits */
-+
-+ /* Stuff to support wide tnodes */
-+ u32 tnode_width;
-+ u32 tnode_mask;
-+ u32 tnode_size;
-+
-+ /* Stuff for figuring out file offset to chunk conversions */
-+ u32 chunk_shift; /* Shift value */
-+ u32 chunk_div; /* Divisor after shifting: 1 for 2^n sizes */
-+ u32 chunk_mask; /* Mask to use for power-of-2 case */
-+
-+ int is_mounted;
-+ int read_only;
-+ int is_checkpointed;
-+
-+ /* Stuff to support block offsetting to support start block zero */
-+ int internal_start_block;
-+ int internal_end_block;
-+ int block_offset;
-+ int chunk_offset;
-+
-+ /* Runtime checkpointing stuff */
-+ int checkpt_page_seq; /* running sequence number of checkpt pages */
-+ int checkpt_byte_count;
-+ int checkpt_byte_offs;
-+ u8 *checkpt_buffer;
-+ int checkpt_open_write;
-+ int blocks_in_checkpt;
-+ int checkpt_cur_chunk;
-+ int checkpt_cur_block;
-+ int checkpt_next_block;
-+ int *checkpt_block_list;
-+ int checkpt_max_blocks;
-+ u32 checkpt_sum;
-+ u32 checkpt_xor;
-+
-+ int checkpoint_blocks_required; /* Number of blocks needed to store
-+ * current checkpoint set */
-+
-+ /* Block Info */
-+ struct yaffs_block_info *block_info;
-+ u8 *chunk_bits; /* bitmap of chunks in use */
-+ u8 block_info_alt:1; /* allocated using alternative alloc */
-+ u8 chunk_bits_alt:1; /* allocated using alternative alloc */
-+ int chunk_bit_stride; /* Number of bytes of chunk_bits per block.
-+ * Must be consistent with chunks_per_block.
-+ */
-+
-+ int n_erased_blocks;
-+ int alloc_block; /* Current block being allocated off */
-+ u32 alloc_page;
-+ int alloc_block_finder; /* Used to search for next allocation block */
-+
-+ /* Object and Tnode memory management */
-+ void *allocator;
-+ int n_obj;
-+ int n_tnodes;
-+
-+ int n_hardlinks;
-+
-+ struct yaffs_obj_bucket obj_bucket[YAFFS_NOBJECT_BUCKETS];
-+ u32 bucket_finder;
-+
-+ int n_free_chunks;
-+
-+ /* Garbage collection control */
-+ u32 *gc_cleanup_list; /* objects to delete at the end of a GC. */
-+ u32 n_clean_ups;
-+
-+ unsigned has_pending_prioritised_gc; /* We think this device might
-+ have pending prioritised gcs */
-+ unsigned gc_disable;
-+ unsigned gc_block_finder;
-+ unsigned gc_dirtiest;
-+ unsigned gc_pages_in_use;
-+ unsigned gc_not_done;
-+ unsigned gc_block;
-+ unsigned gc_chunk;
-+ unsigned gc_skip;
-+ struct yaffs_summary_tags *gc_sum_tags;
-+
-+ /* Special directories */
-+ struct yaffs_obj *root_dir;
-+ struct yaffs_obj *lost_n_found;
-+
-+ int buffered_block; /* Which block is buffered here? */
-+ int doing_buffered_block_rewrite;
-+
-+ struct yaffs_cache *cache;
-+ int cache_last_use;
-+
-+ /* Stuff for background deletion and unlinked files. */
-+ struct yaffs_obj *unlinked_dir; /* Directory where unlinked and deleted
-+ files live. */
-+ struct yaffs_obj *del_dir; /* Directory where deleted objects are
-+ sent to disappear. */
-+ struct yaffs_obj *unlinked_deletion; /* Current file being
-+ background deleted. */
-+ int n_deleted_files; /* Count of files awaiting deletion; */
-+ int n_unlinked_files; /* Count of unlinked files. */
-+ int n_bg_deletions; /* Count of background deletions. */
-+
-+ /* Temporary buffer management */
-+ struct yaffs_buffer temp_buffer[YAFFS_N_TEMP_BUFFERS];
-+ int max_temp;
-+ int temp_in_use;
-+ int unmanaged_buffer_allocs;
-+ int unmanaged_buffer_deallocs;
-+
-+ /* yaffs2 runtime stuff */
-+ unsigned seq_number; /* Sequence number of currently
-+ allocating block */
-+ unsigned oldest_dirty_seq;
-+ unsigned oldest_dirty_block;
-+
-+ /* Block refreshing */
-+ int refresh_skip; /* A skip down counter.
-+ * Refresh happens when this gets to zero. */
-+
-+ /* Dirty directory handling */
-+ struct list_head dirty_dirs; /* List of dirty directories */
-+
-+ /* Summary */
-+ int chunks_per_summary;
-+ struct yaffs_summary_tags *sum_tags;
-+
-+ /* Statistics */
-+ u32 n_page_writes;
-+ u32 n_page_reads;
-+ u32 n_erasures;
-+ u32 n_bad_queries;
-+ u32 n_bad_markings;
-+ u32 n_erase_failures;
-+ u32 n_gc_copies;
-+ u32 all_gcs;
-+ u32 passive_gc_count;
-+ u32 oldest_dirty_gc_count;
-+ u32 n_gc_blocks;
-+ u32 bg_gcs;
-+ u32 n_retried_writes;
-+ u32 n_retired_blocks;
-+ u32 n_ecc_fixed;
-+ u32 n_ecc_unfixed;
-+ u32 n_tags_ecc_fixed;
-+ u32 n_tags_ecc_unfixed;
-+ u32 n_deletions;
-+ u32 n_unmarked_deletions;
-+ u32 refresh_count;
-+ u32 cache_hits;
-+ u32 tags_used;
-+ u32 summary_used;
-+
-+};
-+
-+/* The CheckpointDevice structure holds the device information that changes
-+ *at runtime and must be preserved over unmount/mount cycles.
-+ */
-+struct yaffs_checkpt_dev {
-+ int struct_type;
-+ int n_erased_blocks;
-+ int alloc_block; /* Current block being allocated off */
-+ u32 alloc_page;
-+ int n_free_chunks;
-+
-+ int n_deleted_files; /* Count of files awaiting deletion; */
-+ int n_unlinked_files; /* Count of unlinked files. */
-+ int n_bg_deletions; /* Count of background deletions. */
-+
-+ /* yaffs2 runtime stuff */
-+ unsigned seq_number; /* Sequence number of currently
-+ * allocating block */
-+
-+};
-+
-+struct yaffs_checkpt_validity {
-+ int struct_type;
-+ u32 magic;
-+ u32 version;
-+ u32 head;
-+};
-+
-+struct yaffs_shadow_fixer {
-+ int obj_id;
-+ int shadowed_id;
-+ struct yaffs_shadow_fixer *next;
-+};
-+
-+/* Structure for doing xattr modifications */
-+struct yaffs_xattr_mod {
-+ int set; /* If 0 then this is a deletion */
-+ const YCHAR *name;
-+ const void *data;
-+ int size;
-+ int flags;
-+ int result;
-+};
-+
-+/*----------------------- YAFFS Functions -----------------------*/
-+
-+int yaffs_guts_initialise(struct yaffs_dev *dev);
-+void yaffs_deinitialise(struct yaffs_dev *dev);
-+
-+int yaffs_get_n_free_chunks(struct yaffs_dev *dev);
-+
-+int yaffs_rename_obj(struct yaffs_obj *old_dir, const YCHAR * old_name,
-+ struct yaffs_obj *new_dir, const YCHAR * new_name);
-+
-+int yaffs_unlinker(struct yaffs_obj *dir, const YCHAR * name);
-+int yaffs_del_obj(struct yaffs_obj *obj);
-+struct yaffs_obj *yaffs_retype_obj(struct yaffs_obj *obj,
-+ enum yaffs_obj_type type);
-+
-+
-+int yaffs_get_obj_name(struct yaffs_obj *obj, YCHAR * name, int buffer_size);
-+loff_t yaffs_get_obj_length(struct yaffs_obj *obj);
-+int yaffs_get_obj_inode(struct yaffs_obj *obj);
-+unsigned yaffs_get_obj_type(struct yaffs_obj *obj);
-+int yaffs_get_obj_link_count(struct yaffs_obj *obj);
-+
-+/* File operations */
-+int yaffs_file_rd(struct yaffs_obj *obj, u8 * buffer, loff_t offset,
-+ int n_bytes);
-+int yaffs_wr_file(struct yaffs_obj *obj, const u8 * buffer, loff_t offset,
-+ int n_bytes, int write_trhrough);
-+int yaffs_resize_file(struct yaffs_obj *obj, loff_t new_size);
-+
-+struct yaffs_obj *yaffs_create_file(struct yaffs_obj *parent,
-+ const YCHAR *name, u32 mode, u32 uid,
-+ u32 gid);
-+
-+int yaffs_flush_file(struct yaffs_obj *obj, int update_time, int data_sync);
-+
-+/* Flushing and checkpointing */
-+void yaffs_flush_whole_cache(struct yaffs_dev *dev);
-+
-+int yaffs_checkpoint_save(struct yaffs_dev *dev);
-+int yaffs_checkpoint_restore(struct yaffs_dev *dev);
-+
-+/* Directory operations */
-+struct yaffs_obj *yaffs_create_dir(struct yaffs_obj *parent, const YCHAR *name,
-+ u32 mode, u32 uid, u32 gid);
-+struct yaffs_obj *yaffs_find_by_name(struct yaffs_obj *the_dir,
-+ const YCHAR *name);
-+struct yaffs_obj *yaffs_find_by_number(struct yaffs_dev *dev, u32 number);
-+
-+/* Link operations */
-+struct yaffs_obj *yaffs_link_obj(struct yaffs_obj *parent, const YCHAR *name,
-+ struct yaffs_obj *equiv_obj);
-+
-+struct yaffs_obj *yaffs_get_equivalent_obj(struct yaffs_obj *obj);
-+
-+/* Symlink operations */
-+struct yaffs_obj *yaffs_create_symlink(struct yaffs_obj *parent,
-+ const YCHAR *name, u32 mode, u32 uid,
-+ u32 gid, const YCHAR *alias);
-+YCHAR *yaffs_get_symlink_alias(struct yaffs_obj *obj);
-+
-+/* Special inodes (fifos, sockets and devices) */
-+struct yaffs_obj *yaffs_create_special(struct yaffs_obj *parent,
-+ const YCHAR *name, u32 mode, u32 uid,
-+ u32 gid, u32 rdev);
-+
-+int yaffs_set_xattrib(struct yaffs_obj *obj, const YCHAR *name,
-+ const void *value, int size, int flags);
-+int yaffs_get_xattrib(struct yaffs_obj *obj, const YCHAR *name, void *value,
-+ int size);
-+int yaffs_list_xattrib(struct yaffs_obj *obj, char *buffer, int size);
-+int yaffs_remove_xattrib(struct yaffs_obj *obj, const YCHAR *name);
-+
-+/* Special directories */
-+struct yaffs_obj *yaffs_root(struct yaffs_dev *dev);
-+struct yaffs_obj *yaffs_lost_n_found(struct yaffs_dev *dev);
-+
-+void yaffs_handle_defered_free(struct yaffs_obj *obj);
-+
-+void yaffs_update_dirty_dirs(struct yaffs_dev *dev);
-+
-+int yaffs_bg_gc(struct yaffs_dev *dev, unsigned urgency);
-+
-+/* Debug dump */
-+int yaffs_dump_obj(struct yaffs_obj *obj);
-+
-+void yaffs_guts_test(struct yaffs_dev *dev);
-+int yaffs_guts_ll_init(struct yaffs_dev *dev);
-+
-+
-+/* A few useful functions to be used within the core files*/
-+void yaffs_chunk_del(struct yaffs_dev *dev, int chunk_id, int mark_flash,
-+ int lyn);
-+int yaffs_check_ff(u8 *buffer, int n_bytes);
-+void yaffs_handle_chunk_error(struct yaffs_dev *dev,
-+ struct yaffs_block_info *bi);
-+
-+u8 *yaffs_get_temp_buffer(struct yaffs_dev *dev);
-+void yaffs_release_temp_buffer(struct yaffs_dev *dev, u8 *buffer);
-+
-+struct yaffs_obj *yaffs_find_or_create_by_number(struct yaffs_dev *dev,
-+ int number,
-+ enum yaffs_obj_type type);
-+int yaffs_put_chunk_in_file(struct yaffs_obj *in, int inode_chunk,
-+ int nand_chunk, int in_scan);
-+void yaffs_set_obj_name(struct yaffs_obj *obj, const YCHAR *name);
-+void yaffs_set_obj_name_from_oh(struct yaffs_obj *obj,
-+ const struct yaffs_obj_hdr *oh);
-+void yaffs_add_obj_to_dir(struct yaffs_obj *directory, struct yaffs_obj *obj);
-+YCHAR *yaffs_clone_str(const YCHAR *str);
-+void yaffs_link_fixup(struct yaffs_dev *dev, struct list_head *hard_list);
-+void yaffs_block_became_dirty(struct yaffs_dev *dev, int block_no);
-+int yaffs_update_oh(struct yaffs_obj *in, const YCHAR *name,
-+ int force, int is_shrink, int shadows,
-+ struct yaffs_xattr_mod *xop);
-+void yaffs_handle_shadowed_obj(struct yaffs_dev *dev, int obj_id,
-+ int backward_scanning);
-+int yaffs_check_alloc_available(struct yaffs_dev *dev, int n_chunks);
-+struct yaffs_tnode *yaffs_get_tnode(struct yaffs_dev *dev);
-+struct yaffs_tnode *yaffs_add_find_tnode_0(struct yaffs_dev *dev,
-+ struct yaffs_file_var *file_struct,
-+ u32 chunk_id,
-+ struct yaffs_tnode *passed_tn);
-+
-+int yaffs_do_file_wr(struct yaffs_obj *in, const u8 *buffer, loff_t offset,
-+ int n_bytes, int write_trhrough);
-+void yaffs_resize_file_down(struct yaffs_obj *obj, loff_t new_size);
-+void yaffs_skip_rest_of_block(struct yaffs_dev *dev);
-+
-+int yaffs_count_free_chunks(struct yaffs_dev *dev);
-+
-+struct yaffs_tnode *yaffs_find_tnode_0(struct yaffs_dev *dev,
-+ struct yaffs_file_var *file_struct,
-+ u32 chunk_id);
-+
-+u32 yaffs_get_group_base(struct yaffs_dev *dev, struct yaffs_tnode *tn,
-+ unsigned pos);
-+
-+int yaffs_is_non_empty_dir(struct yaffs_obj *obj);
-+
-+int yaffs_guts_format_dev(struct yaffs_dev *dev);
-+
-+void yaffs_addr_to_chunk(struct yaffs_dev *dev, loff_t addr,
-+ int *chunk_out, u32 *offset_out);
-+/*
-+ * Marshalling functions to get loff_t file sizes into aand out of
-+ * object headers.
-+ */
-+void yaffs_oh_size_load(struct yaffs_obj_hdr *oh, loff_t fsize);
-+loff_t yaffs_oh_to_size(struct yaffs_obj_hdr *oh);
-+loff_t yaffs_max_file_size(struct yaffs_dev *dev);
-+
-+/*
-+ * Debug function to count number of blocks in each state
-+ * NB Needs to be called with correct number of integers
-+ */
-+
-+void yaffs_count_blocks_by_state(struct yaffs_dev *dev, int bs[10]);
-+
-+int yaffs_find_chunk_in_file(struct yaffs_obj *in, int inode_chunk,
-+ struct yaffs_ext_tags *tags);
-+
-+#endif
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_linux.h linux-3.4.90/fs/yaffs2/yaffs_linux.h
---- linux-3.4.90.orig/fs/yaffs2/yaffs_linux.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_linux.h 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,48 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_LINUX_H__
-+#define __YAFFS_LINUX_H__
-+
-+#include "yportenv.h"
-+
-+struct yaffs_linux_context {
-+ struct list_head context_list; /* List of these we have mounted */
-+ struct yaffs_dev *dev;
-+ struct super_block *super;
-+ struct task_struct *bg_thread; /* Background thread for this device */
-+ int bg_running;
-+ struct mutex gross_lock; /* Gross locking mutex*/
-+ u8 *spare_buffer; /* For mtdif2 use. Don't know the buffer size
-+ * at compile time so we have to allocate it.
-+ */
-+ struct list_head search_contexts;
-+ struct task_struct *readdir_process;
-+ unsigned mount_id;
-+ int dirty;
-+};
-+
-+#define yaffs_dev_to_lc(dev) ((struct yaffs_linux_context *)((dev)->os_context))
-+#define yaffs_dev_to_mtd(dev) ((struct mtd_info *)((dev)->driver_context))
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-+#define WRITE_SIZE_STR "writesize"
-+#define WRITE_SIZE(mtd) ((mtd)->writesize)
-+#else
-+#define WRITE_SIZE_STR "oobblock"
-+#define WRITE_SIZE(mtd) ((mtd)->oobblock)
-+#endif
-+
-+#endif
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_mtdif.c linux-3.4.90/fs/yaffs2/yaffs_mtdif.c
---- linux-3.4.90.orig/fs/yaffs2/yaffs_mtdif.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_mtdif.c 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,309 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yportenv.h"
-+
-+#include "yaffs_mtdif.h"
-+
-+#include "linux/mtd/mtd.h"
-+#include "linux/types.h"
-+#include "linux/time.h"
-+#include "linux/major.h"
-+#include "linux/mtd/nand.h"
-+#include "linux/kernel.h"
-+#include "linux/version.h"
-+#include "linux/types.h"
-+
-+#include "yaffs_trace.h"
-+#include "yaffs_guts.h"
-+#include "yaffs_linux.h"
-+
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 2, 0))
-+#define MTD_OPS_AUTO_OOB MTD_OOB_AUTO
-+#endif
-+
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 4, 0))
-+#define mtd_erase(m, ei) (m)->erase(m, ei)
-+#define mtd_write_oob(m, addr, pops) (m)->write_oob(m, addr, pops)
-+#define mtd_read_oob(m, addr, pops) (m)->read_oob(m, addr, pops)
-+#define mtd_block_isbad(m, offs) (m)->block_isbad(m, offs)
-+#define mtd_block_markbad(m, offs) (m)->block_markbad(m, offs)
-+#endif
-+
-+
-+
-+int nandmtd_erase_block(struct yaffs_dev *dev, int block_no)
-+{
-+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
-+ u32 addr =
-+ ((loff_t) block_no) * dev->param.total_bytes_per_chunk *
-+ dev->param.chunks_per_block;
-+ struct erase_info ei;
-+ int retval = 0;
-+
-+ ei.mtd = mtd;
-+ ei.addr = addr;
-+ ei.len = dev->param.total_bytes_per_chunk * dev->param.chunks_per_block;
-+ ei.time = 1000;
-+ ei.retries = 2;
-+ ei.callback = NULL;
-+ ei.priv = (u_long) dev;
-+
-+ retval = mtd_erase(mtd, &ei);
-+
-+ if (retval == 0)
-+ return YAFFS_OK;
-+
-+ return YAFFS_FAIL;
-+}
-+
-+
-+static int yaffs_mtd_write(struct yaffs_dev *dev, int nand_chunk,
-+ const u8 *data, int data_len,
-+ const u8 *oob, int oob_len)
-+{
-+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
-+ loff_t addr;
-+ struct mtd_oob_ops ops;
-+ int retval;
-+
-+ yaffs_trace(YAFFS_TRACE_MTD,
-+ "yaffs_mtd_write(%p, %d, %p, %d, %p, %d)\n",
-+ dev, nand_chunk, data, data_len, oob, oob_len);
-+
-+ if (!data || !data_len) {
-+ data = NULL;
-+ data_len = 0;
-+ }
-+
-+ if (!oob || !oob_len) {
-+ oob = NULL;
-+ oob_len = 0;
-+ }
-+
-+ addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk;
-+ memset(&ops, 0, sizeof(ops));
-+ ops.mode = MTD_OPS_AUTO_OOB;
-+ ops.len = (data) ? data_len : 0;
-+ ops.ooblen = oob_len;
-+ ops.datbuf = (u8 *)data;
-+ ops.oobbuf = (u8 *)oob;
-+
-+ retval = mtd_write_oob(mtd, addr, &ops);
-+ if (retval) {
-+ yaffs_trace(YAFFS_TRACE_MTD,
-+ "write_oob failed, chunk %d, mtd error %d",
-+ nand_chunk, retval);
-+ }
-+ return retval ? YAFFS_FAIL : YAFFS_OK;
-+}
-+
-+static int yaffs_mtd_read(struct yaffs_dev *dev, int nand_chunk,
-+ u8 *data, int data_len,
-+ u8 *oob, int oob_len,
-+ enum yaffs_ecc_result *ecc_result)
-+{
-+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
-+ loff_t addr;
-+ struct mtd_oob_ops ops;
-+ int retval;
-+
-+ addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk;
-+ memset(&ops, 0, sizeof(ops));
-+ ops.mode = MTD_OPS_AUTO_OOB;
-+ ops.len = (data) ? data_len : 0;
-+ ops.ooblen = oob_len;
-+ ops.datbuf = data;
-+ ops.oobbuf = oob;
-+
-+#if (MTD_VERSION_CODE < MTD_VERSION(2, 6, 20))
-+ /* In MTD 2.6.18 to 2.6.19 nand_base.c:nand_do_read_oob() has a bug;
-+ * help it out with ops.len = ops.ooblen when ops.datbuf == NULL.
-+ */
-+ ops.len = (ops.datbuf) ? ops.len : ops.ooblen;
-+#endif
-+ /* Read page and oob using MTD.
-+ * Check status and determine ECC result.
-+ */
-+ retval = mtd_read_oob(mtd, addr, &ops);
-+ if (retval)
-+ yaffs_trace(YAFFS_TRACE_MTD,
-+ "read_oob failed, chunk %d, mtd error %d",
-+ nand_chunk, retval);
-+
-+ switch (retval) {
-+ case 0:
-+ /* no error */
-+ if(ecc_result)
-+ *ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
-+ break;
-+
-+ case -EUCLEAN:
-+ /* MTD's ECC fixed the data */
-+ if(ecc_result)
-+ *ecc_result = YAFFS_ECC_RESULT_FIXED;
-+ dev->n_ecc_fixed++;
-+ break;
-+
-+ case -EBADMSG:
-+ default:
-+ /* MTD's ECC could not fix the data */
-+ dev->n_ecc_unfixed++;
-+ if(ecc_result)
-+ *ecc_result = YAFFS_ECC_RESULT_UNFIXED;
-+ return YAFFS_FAIL;
-+ }
-+
-+ return YAFFS_OK;
-+}
-+
-+static int yaffs_mtd_erase(struct yaffs_dev *dev, int block_no)
-+{
-+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
-+
-+ loff_t addr;
-+ struct erase_info ei;
-+ int retval = 0;
-+ u32 block_size;
-+
-+ block_size = dev->param.total_bytes_per_chunk *
-+ dev->param.chunks_per_block;
-+ addr = ((loff_t) block_no) * block_size;
-+
-+ ei.mtd = mtd;
-+ ei.addr = addr;
-+ ei.len = block_size;
-+ ei.time = 1000;
-+ ei.retries = 2;
-+ ei.callback = NULL;
-+ ei.priv = (u_long) dev;
-+
-+ retval = mtd_erase(mtd, &ei);
-+
-+ if (retval == 0)
-+ return YAFFS_OK;
-+
-+ return YAFFS_FAIL;
-+}
-+
-+static int yaffs_mtd_mark_bad(struct yaffs_dev *dev, int block_no)
-+{
-+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
-+ int blocksize = dev->param.chunks_per_block * dev->param.total_bytes_per_chunk;
-+ int retval;
-+
-+ yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, "marking block %d bad", block_no);
-+
-+ retval = mtd_block_markbad(mtd, (loff_t) blocksize * block_no);
-+ return (retval) ? YAFFS_FAIL : YAFFS_OK;
-+}
-+
-+static int yaffs_mtd_check_bad(struct yaffs_dev *dev, int block_no)
-+{
-+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
-+ int blocksize = dev->param.chunks_per_block * dev->param.total_bytes_per_chunk;
-+ int retval;
-+
-+ yaffs_trace(YAFFS_TRACE_MTD, "checking block %d bad", block_no);
-+
-+ retval = mtd_block_isbad(mtd, (loff_t) blocksize * block_no);
-+ return (retval) ? YAFFS_FAIL : YAFFS_OK;
-+}
-+
-+static int yaffs_mtd_initialise(struct yaffs_dev *dev)
-+{
-+ return YAFFS_OK;
-+}
-+
-+static int yaffs_mtd_deinitialise(struct yaffs_dev *dev)
-+{
-+ return YAFFS_OK;
-+}
-+
-+
-+void yaffs_mtd_drv_install(struct yaffs_dev *dev)
-+{
-+ struct yaffs_driver *drv = &dev->drv;
-+
-+ drv->drv_write_chunk_fn = yaffs_mtd_write;
-+ drv->drv_read_chunk_fn = yaffs_mtd_read;
-+ drv->drv_erase_fn = yaffs_mtd_erase;
-+ drv->drv_mark_bad_fn = yaffs_mtd_mark_bad;
-+ drv->drv_check_bad_fn = yaffs_mtd_check_bad;
-+ drv->drv_initialise_fn = yaffs_mtd_initialise;
-+ drv->drv_deinitialise_fn = yaffs_mtd_deinitialise;
-+}
-+
-+
-+struct mtd_info * yaffs_get_mtd_device(dev_t sdev)
-+{
-+ struct mtd_info *mtd;
-+
-+ mtd = yaffs_get_mtd_device(sdev);
-+
-+ /* Check it's an mtd device..... */
-+ if (MAJOR(sdev) != MTD_BLOCK_MAJOR)
-+ return NULL; /* This isn't an mtd device */
-+
-+ /* Check it's NAND */
-+ if (mtd->type != MTD_NANDFLASH) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs: MTD device is not NAND it's type %d",
-+ mtd->type);
-+ return NULL;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_OS, " %s %d", WRITE_SIZE_STR, WRITE_SIZE(mtd));
-+ yaffs_trace(YAFFS_TRACE_OS, " oobsize %d", mtd->oobsize);
-+ yaffs_trace(YAFFS_TRACE_OS, " erasesize %d", mtd->erasesize);
-+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
-+ yaffs_trace(YAFFS_TRACE_OS, " size %u", mtd->size);
-+#else
-+ yaffs_trace(YAFFS_TRACE_OS, " size %lld", mtd->size);
-+#endif
-+
-+ return mtd;
-+}
-+
-+int yaffs_verify_mtd(struct mtd_info *mtd, int yaffs_version, int inband_tags)
-+{
-+ if (yaffs_version == 2) {
-+ if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
-+ mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) &&
-+ !inband_tags) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "MTD device does not have the right page sizes"
-+ );
-+ return -1;
-+ }
-+ } else {
-+ if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK ||
-+ mtd->oobsize != YAFFS_BYTES_PER_SPARE) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "MTD device does not support have the right page sizes"
-+ );
-+ return -1;
-+ }
-+ }
-+
-+ return 0;
-+}
-+
-+
-+void yaffs_put_mtd_device(struct mtd_info *mtd)
-+{
-+ if(mtd)
-+ put_mtd_device(mtd);
-+}
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_mtdif.h linux-3.4.90/fs/yaffs2/yaffs_mtdif.h
---- linux-3.4.90.orig/fs/yaffs2/yaffs_mtdif.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_mtdif.h 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,25 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_MTDIF_H__
-+#define __YAFFS_MTDIF_H__
-+
-+#include "yaffs_guts.h"
-+
-+void yaffs_mtd_drv_install(struct yaffs_dev *dev);
-+struct mtd_info * yaffs_get_mtd_device(dev_t sdev);
-+void yaffs_put_mtd_device(struct mtd_info *mtd);
-+int yaffs_verify_mtd(struct mtd_info *mtd, int yaffs_version, int inband_tags);
-+#endif
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_nameval.c linux-3.4.90/fs/yaffs2/yaffs_nameval.c
---- linux-3.4.90.orig/fs/yaffs2/yaffs_nameval.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_nameval.c 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,208 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+/*
-+ * This simple implementation of a name-value store assumes a small number of
-+* values and fits into a small finite buffer.
-+ *
-+ * Each attribute is stored as a record:
-+ * sizeof(int) bytes record size.
-+ * strnlen+1 bytes name null terminated.
-+ * nbytes value.
-+ * ----------
-+ * total size stored in record size
-+ *
-+ * This code has not been tested with unicode yet.
-+ */
-+
-+#include "yaffs_nameval.h"
-+
-+#include "yportenv.h"
-+
-+static int nval_find(const char *xb, int xb_size, const YCHAR *name,
-+ int *exist_size)
-+{
-+ int pos = 0;
-+ int size;
-+
-+ memcpy(&size, xb, sizeof(int));
-+ while (size > 0 && (size < xb_size) && (pos + size < xb_size)) {
-+ if (!strncmp((YCHAR *) (xb + pos + sizeof(int)),
-+ name, size)) {
-+ if (exist_size)
-+ *exist_size = size;
-+ return pos;
-+ }
-+ pos += size;
-+ if (pos < xb_size - sizeof(int))
-+ memcpy(&size, xb + pos, sizeof(int));
-+ else
-+ size = 0;
-+ }
-+ if (exist_size)
-+ *exist_size = 0;
-+ return -ENODATA;
-+}
-+
-+static int nval_used(const char *xb, int xb_size)
-+{
-+ int pos = 0;
-+ int size;
-+
-+ memcpy(&size, xb + pos, sizeof(int));
-+ while (size > 0 && (size < xb_size) && (pos + size < xb_size)) {
-+ pos += size;
-+ if (pos < xb_size - sizeof(int))
-+ memcpy(&size, xb + pos, sizeof(int));
-+ else
-+ size = 0;
-+ }
-+ return pos;
-+}
-+
-+int nval_del(char *xb, int xb_size, const YCHAR *name)
-+{
-+ int pos = nval_find(xb, xb_size, name, NULL);
-+ int size;
-+
-+ if (pos < 0 || pos >= xb_size)
-+ return -ENODATA;
-+
-+ /* Find size, shift rest over this record,
-+ * then zero out the rest of buffer */
-+ memcpy(&size, xb + pos, sizeof(int));
-+ memcpy(xb + pos, xb + pos + size, xb_size - (pos + size));
-+ memset(xb + (xb_size - size), 0, size);
-+ return 0;
-+}
-+
-+int nval_set(char *xb, int xb_size, const YCHAR *name, const char *buf,
-+ int bsize, int flags)
-+{
-+ int pos;
-+ int namelen = strnlen(name, xb_size);
-+ int reclen;
-+ int size_exist = 0;
-+ int space;
-+ int start;
-+
-+ pos = nval_find(xb, xb_size, name, &size_exist);
-+
-+ if (flags & XATTR_CREATE && pos >= 0)
-+ return -EEXIST;
-+ if (flags & XATTR_REPLACE && pos < 0)
-+ return -ENODATA;
-+
-+ start = nval_used(xb, xb_size);
-+ space = xb_size - start + size_exist;
-+
-+ reclen = (sizeof(int) + namelen + 1 + bsize);
-+
-+ if (reclen > space)
-+ return -ENOSPC;
-+
-+ if (pos >= 0) {
-+ nval_del(xb, xb_size, name);
-+ start = nval_used(xb, xb_size);
-+ }
-+
-+ pos = start;
-+
-+ memcpy(xb + pos, &reclen, sizeof(int));
-+ pos += sizeof(int);
-+ strncpy((YCHAR *) (xb + pos), name, reclen);
-+ pos += (namelen + 1);
-+ memcpy(xb + pos, buf, bsize);
-+ return 0;
-+}
-+
-+int nval_get(const char *xb, int xb_size, const YCHAR * name, char *buf,
-+ int bsize)
-+{
-+ int pos = nval_find(xb, xb_size, name, NULL);
-+ int size;
-+
-+ if (pos >= 0 && pos < xb_size) {
-+
-+ memcpy(&size, xb + pos, sizeof(int));
-+ pos += sizeof(int); /* advance past record length */
-+ size -= sizeof(int);
-+
-+ /* Advance over name string */
-+ while (xb[pos] && size > 0 && pos < xb_size) {
-+ pos++;
-+ size--;
-+ }
-+ /*Advance over NUL */
-+ pos++;
-+ size--;
-+
-+ /* If bsize is zero then this is a size query.
-+ * Return the size, but don't copy.
-+ */
-+ if (!bsize)
-+ return size;
-+
-+ if (size <= bsize) {
-+ memcpy(buf, xb + pos, size);
-+ return size;
-+ }
-+ }
-+ if (pos >= 0)
-+ return -ERANGE;
-+
-+ return -ENODATA;
-+}
-+
-+int nval_list(const char *xb, int xb_size, char *buf, int bsize)
-+{
-+ int pos = 0;
-+ int size;
-+ int name_len;
-+ int ncopied = 0;
-+ int filled = 0;
-+
-+ memcpy(&size, xb + pos, sizeof(int));
-+ while (size > sizeof(int) &&
-+ size <= xb_size &&
-+ (pos + size) < xb_size &&
-+ !filled) {
-+ pos += sizeof(int);
-+ size -= sizeof(int);
-+ name_len = strnlen((YCHAR *) (xb + pos), size);
-+ if (ncopied + name_len + 1 < bsize) {
-+ memcpy(buf, xb + pos, name_len * sizeof(YCHAR));
-+ buf += name_len;
-+ *buf = '\0';
-+ buf++;
-+ if (sizeof(YCHAR) > 1) {
-+ *buf = '\0';
-+ buf++;
-+ }
-+ ncopied += (name_len + 1);
-+ } else {
-+ filled = 1;
-+ }
-+ pos += size;
-+ if (pos < xb_size - sizeof(int))
-+ memcpy(&size, xb + pos, sizeof(int));
-+ else
-+ size = 0;
-+ }
-+ return ncopied;
-+}
-+
-+int nval_hasvalues(const char *xb, int xb_size)
-+{
-+ return nval_used(xb, xb_size) > 0;
-+}
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_nameval.h linux-3.4.90/fs/yaffs2/yaffs_nameval.h
---- linux-3.4.90.orig/fs/yaffs2/yaffs_nameval.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_nameval.h 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,28 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __NAMEVAL_H__
-+#define __NAMEVAL_H__
-+
-+#include "yportenv.h"
-+
-+int nval_del(char *xb, int xb_size, const YCHAR * name);
-+int nval_set(char *xb, int xb_size, const YCHAR * name, const char *buf,
-+ int bsize, int flags);
-+int nval_get(const char *xb, int xb_size, const YCHAR * name, char *buf,
-+ int bsize);
-+int nval_list(const char *xb, int xb_size, char *buf, int bsize);
-+int nval_hasvalues(const char *xb, int xb_size);
-+#endif
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_nand.c linux-3.4.90/fs/yaffs2/yaffs_nand.c
---- linux-3.4.90.orig/fs/yaffs2/yaffs_nand.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_nand.c 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,122 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_nand.h"
-+#include "yaffs_tagscompat.h"
-+
-+#include "yaffs_getblockinfo.h"
-+#include "yaffs_summary.h"
-+
-+static int apply_chunk_offset(struct yaffs_dev *dev, int chunk)
-+{
-+ return chunk - dev->chunk_offset;
-+}
-+
-+int yaffs_rd_chunk_tags_nand(struct yaffs_dev *dev, int nand_chunk,
-+ u8 *buffer, struct yaffs_ext_tags *tags)
-+{
-+ int result;
-+ struct yaffs_ext_tags local_tags;
-+ int flash_chunk = apply_chunk_offset(dev, nand_chunk);
-+
-+ dev->n_page_reads++;
-+
-+ /* If there are no tags provided use local tags. */
-+ if (!tags)
-+ tags = &local_tags;
-+
-+ result = dev->tagger.read_chunk_tags_fn(dev, flash_chunk, buffer, tags);
-+ if (tags && tags->ecc_result > YAFFS_ECC_RESULT_NO_ERROR) {
-+
-+ struct yaffs_block_info *bi;
-+ bi = yaffs_get_block_info(dev,
-+ nand_chunk /
-+ dev->param.chunks_per_block);
-+ yaffs_handle_chunk_error(dev, bi);
-+ }
-+ return result;
-+}
-+
-+int yaffs_wr_chunk_tags_nand(struct yaffs_dev *dev,
-+ int nand_chunk,
-+ const u8 *buffer, struct yaffs_ext_tags *tags)
-+{
-+ int result;
-+ int flash_chunk = apply_chunk_offset(dev, nand_chunk);
-+
-+ dev->n_page_writes++;
-+
-+ if (!tags) {
-+ yaffs_trace(YAFFS_TRACE_ERROR, "Writing with no tags");
-+ BUG();
-+ return YAFFS_FAIL;
-+ }
-+
-+ tags->seq_number = dev->seq_number;
-+ tags->chunk_used = 1;
-+ yaffs_trace(YAFFS_TRACE_WRITE,
-+ "Writing chunk %d tags %d %d",
-+ nand_chunk, tags->obj_id, tags->chunk_id);
-+
-+ result = dev->tagger.write_chunk_tags_fn(dev, flash_chunk,
-+ buffer, tags);
-+
-+ yaffs_summary_add(dev, tags, nand_chunk);
-+
-+ return result;
-+}
-+
-+int yaffs_mark_bad(struct yaffs_dev *dev, int block_no)
-+{
-+ block_no -= dev->block_offset;
-+ dev->n_bad_markings++;
-+
-+ if (dev->param.disable_bad_block_marking)
-+ return YAFFS_OK;
-+
-+ return dev->tagger.mark_bad_fn(dev, block_no);
-+}
-+
-+
-+int yaffs_query_init_block_state(struct yaffs_dev *dev,
-+ int block_no,
-+ enum yaffs_block_state *state,
-+ u32 *seq_number)
-+{
-+ block_no -= dev->block_offset;
-+ return dev->tagger.query_block_fn(dev, block_no, state, seq_number);
-+}
-+
-+int yaffs_erase_block(struct yaffs_dev *dev, int block_no)
-+{
-+ int result;
-+
-+ block_no -= dev->block_offset;
-+ dev->n_erasures++;
-+ result = dev->drv.drv_erase_fn(dev, block_no);
-+ return result;
-+}
-+
-+int yaffs_init_nand(struct yaffs_dev *dev)
-+{
-+ if (dev->drv.drv_initialise_fn)
-+ return dev->drv.drv_initialise_fn(dev);
-+ return YAFFS_OK;
-+}
-+
-+int yaffs_deinit_nand(struct yaffs_dev *dev)
-+{
-+ if (dev->drv.drv_deinitialise_fn)
-+ return dev->drv.drv_deinitialise_fn(dev);
-+ return YAFFS_OK;
-+}
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_nand.h linux-3.4.90/fs/yaffs2/yaffs_nand.h
---- linux-3.4.90.orig/fs/yaffs2/yaffs_nand.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_nand.h 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,39 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_NAND_H__
-+#define __YAFFS_NAND_H__
-+#include "yaffs_guts.h"
-+
-+int yaffs_rd_chunk_tags_nand(struct yaffs_dev *dev, int nand_chunk,
-+ u8 *buffer, struct yaffs_ext_tags *tags);
-+
-+int yaffs_wr_chunk_tags_nand(struct yaffs_dev *dev,
-+ int nand_chunk,
-+ const u8 *buffer, struct yaffs_ext_tags *tags);
-+
-+int yaffs_mark_bad(struct yaffs_dev *dev, int block_no);
-+
-+int yaffs_query_init_block_state(struct yaffs_dev *dev,
-+ int block_no,
-+ enum yaffs_block_state *state,
-+ unsigned *seq_number);
-+
-+int yaffs_erase_block(struct yaffs_dev *dev, int flash_block);
-+
-+int yaffs_init_nand(struct yaffs_dev *dev);
-+int yaffs_deinit_nand(struct yaffs_dev *dev);
-+
-+#endif
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_packedtags1.c linux-3.4.90/fs/yaffs2/yaffs_packedtags1.c
---- linux-3.4.90.orig/fs/yaffs2/yaffs_packedtags1.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_packedtags1.c 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,56 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_packedtags1.h"
-+#include "yportenv.h"
-+
-+static const u8 all_ff[20] = {
-+ 0xff, 0xff, 0xff, 0xff,
-+ 0xff, 0xff, 0xff, 0xff,
-+ 0xff, 0xff, 0xff, 0xff,
-+ 0xff, 0xff, 0xff, 0xff,
-+ 0xff, 0xff, 0xff, 0xff
-+};
-+
-+void yaffs_pack_tags1(struct yaffs_packed_tags1 *pt,
-+ const struct yaffs_ext_tags *t)
-+{
-+ pt->chunk_id = t->chunk_id;
-+ pt->serial_number = t->serial_number;
-+ pt->n_bytes = t->n_bytes;
-+ pt->obj_id = t->obj_id;
-+ pt->ecc = 0;
-+ pt->deleted = (t->is_deleted) ? 0 : 1;
-+ pt->unused_stuff = 0;
-+ pt->should_be_ff = 0xffffffff;
-+}
-+
-+void yaffs_unpack_tags1(struct yaffs_ext_tags *t,
-+ const struct yaffs_packed_tags1 *pt)
-+{
-+
-+ if (memcmp(all_ff, pt, sizeof(struct yaffs_packed_tags1))) {
-+ t->block_bad = 0;
-+ if (pt->should_be_ff != 0xffffffff)
-+ t->block_bad = 1;
-+ t->chunk_used = 1;
-+ t->obj_id = pt->obj_id;
-+ t->chunk_id = pt->chunk_id;
-+ t->n_bytes = pt->n_bytes;
-+ t->ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
-+ t->is_deleted = (pt->deleted) ? 0 : 1;
-+ t->serial_number = pt->serial_number;
-+ } else {
-+ memset(t, 0, sizeof(struct yaffs_ext_tags));
-+ }
-+}
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_packedtags1.h linux-3.4.90/fs/yaffs2/yaffs_packedtags1.h
---- linux-3.4.90.orig/fs/yaffs2/yaffs_packedtags1.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_packedtags1.h 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,39 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+/* This is used to pack YAFFS1 tags, not YAFFS2 tags. */
-+
-+#ifndef __YAFFS_PACKEDTAGS1_H__
-+#define __YAFFS_PACKEDTAGS1_H__
-+
-+#include "yaffs_guts.h"
-+
-+struct yaffs_packed_tags1 {
-+ u32 chunk_id:20;
-+ u32 serial_number:2;
-+ u32 n_bytes:10;
-+ u32 obj_id:18;
-+ u32 ecc:12;
-+ u32 deleted:1;
-+ u32 unused_stuff:1;
-+ unsigned should_be_ff;
-+
-+};
-+
-+void yaffs_pack_tags1(struct yaffs_packed_tags1 *pt,
-+ const struct yaffs_ext_tags *t);
-+void yaffs_unpack_tags1(struct yaffs_ext_tags *t,
-+ const struct yaffs_packed_tags1 *pt);
-+#endif
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_packedtags2.c linux-3.4.90/fs/yaffs2/yaffs_packedtags2.c
---- linux-3.4.90.orig/fs/yaffs2/yaffs_packedtags2.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_packedtags2.c 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,197 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_packedtags2.h"
-+#include "yportenv.h"
-+#include "yaffs_trace.h"
-+
-+/* This code packs a set of extended tags into a binary structure for
-+ * NAND storage
-+ */
-+
-+/* Some of the information is "extra" struff which can be packed in to
-+ * speed scanning
-+ * This is defined by having the EXTRA_HEADER_INFO_FLAG set.
-+ */
-+
-+/* Extra flags applied to chunk_id */
-+
-+#define EXTRA_HEADER_INFO_FLAG 0x80000000
-+#define EXTRA_SHRINK_FLAG 0x40000000
-+#define EXTRA_SHADOWS_FLAG 0x20000000
-+#define EXTRA_SPARE_FLAGS 0x10000000
-+
-+#define ALL_EXTRA_FLAGS 0xf0000000
-+
-+/* Also, the top 4 bits of the object Id are set to the object type. */
-+#define EXTRA_OBJECT_TYPE_SHIFT (28)
-+#define EXTRA_OBJECT_TYPE_MASK ((0x0f) << EXTRA_OBJECT_TYPE_SHIFT)
-+
-+static void yaffs_dump_packed_tags2_tags_only(
-+ const struct yaffs_packed_tags2_tags_only *ptt)
-+{
-+ yaffs_trace(YAFFS_TRACE_MTD,
-+ "packed tags obj %d chunk %d byte %d seq %d",
-+ ptt->obj_id, ptt->chunk_id, ptt->n_bytes, ptt->seq_number);
-+}
-+
-+static void yaffs_dump_packed_tags2(const struct yaffs_packed_tags2 *pt)
-+{
-+ yaffs_dump_packed_tags2_tags_only(&pt->t);
-+}
-+
-+static void yaffs_dump_tags2(const struct yaffs_ext_tags *t)
-+{
-+ yaffs_trace(YAFFS_TRACE_MTD,
-+ "ext.tags eccres %d blkbad %d chused %d obj %d chunk%d byte %d del %d ser %d seq %d",
-+ t->ecc_result, t->block_bad, t->chunk_used, t->obj_id,
-+ t->chunk_id, t->n_bytes, t->is_deleted, t->serial_number,
-+ t->seq_number);
-+
-+}
-+
-+static int yaffs_check_tags_extra_packable(const struct yaffs_ext_tags *t)
-+{
-+ if (t->chunk_id != 0 || !t->extra_available)
-+ return 0;
-+
-+ /* Check if the file size is too long to store */
-+ if (t->extra_obj_type == YAFFS_OBJECT_TYPE_FILE &&
-+ (t->extra_file_size >> 31) != 0)
-+ return 0;
-+ return 1;
-+}
-+
-+void yaffs_pack_tags2_tags_only(struct yaffs_packed_tags2_tags_only *ptt,
-+ const struct yaffs_ext_tags *t)
-+{
-+ ptt->chunk_id = t->chunk_id;
-+ ptt->seq_number = t->seq_number;
-+ ptt->n_bytes = t->n_bytes;
-+ ptt->obj_id = t->obj_id;
-+
-+ /* Only store extra tags for object headers.
-+ * If it is a file then only store if the file size is short\
-+ * enough to fit.
-+ */
-+ if (yaffs_check_tags_extra_packable(t)) {
-+ /* Store the extra header info instead */
-+ /* We save the parent object in the chunk_id */
-+ ptt->chunk_id = EXTRA_HEADER_INFO_FLAG | t->extra_parent_id;
-+ if (t->extra_is_shrink)
-+ ptt->chunk_id |= EXTRA_SHRINK_FLAG;
-+ if (t->extra_shadows)
-+ ptt->chunk_id |= EXTRA_SHADOWS_FLAG;
-+
-+ ptt->obj_id &= ~EXTRA_OBJECT_TYPE_MASK;
-+ ptt->obj_id |= (t->extra_obj_type << EXTRA_OBJECT_TYPE_SHIFT);
-+
-+ if (t->extra_obj_type == YAFFS_OBJECT_TYPE_HARDLINK)
-+ ptt->n_bytes = t->extra_equiv_id;
-+ else if (t->extra_obj_type == YAFFS_OBJECT_TYPE_FILE)
-+ ptt->n_bytes = (unsigned) t->extra_file_size;
-+ else
-+ ptt->n_bytes = 0;
-+ }
-+
-+ yaffs_dump_packed_tags2_tags_only(ptt);
-+ yaffs_dump_tags2(t);
-+}
-+
-+void yaffs_pack_tags2(struct yaffs_packed_tags2 *pt,
-+ const struct yaffs_ext_tags *t, int tags_ecc)
-+{
-+ yaffs_pack_tags2_tags_only(&pt->t, t);
-+
-+ if (tags_ecc)
-+ yaffs_ecc_calc_other((unsigned char *)&pt->t,
-+ sizeof(struct yaffs_packed_tags2_tags_only),
-+ &pt->ecc);
-+}
-+
-+void yaffs_unpack_tags2_tags_only(struct yaffs_ext_tags *t,
-+ struct yaffs_packed_tags2_tags_only *ptt)
-+{
-+ memset(t, 0, sizeof(struct yaffs_ext_tags));
-+
-+ if (ptt->seq_number == 0xffffffff)
-+ return;
-+
-+ t->block_bad = 0;
-+ t->chunk_used = 1;
-+ t->obj_id = ptt->obj_id;
-+ t->chunk_id = ptt->chunk_id;
-+ t->n_bytes = ptt->n_bytes;
-+ t->is_deleted = 0;
-+ t->serial_number = 0;
-+ t->seq_number = ptt->seq_number;
-+
-+ /* Do extra header info stuff */
-+ if (ptt->chunk_id & EXTRA_HEADER_INFO_FLAG) {
-+ t->chunk_id = 0;
-+ t->n_bytes = 0;
-+
-+ t->extra_available = 1;
-+ t->extra_parent_id = ptt->chunk_id & (~(ALL_EXTRA_FLAGS));
-+ t->extra_is_shrink = ptt->chunk_id & EXTRA_SHRINK_FLAG ? 1 : 0;
-+ t->extra_shadows = ptt->chunk_id & EXTRA_SHADOWS_FLAG ? 1 : 0;
-+ t->extra_obj_type = ptt->obj_id >> EXTRA_OBJECT_TYPE_SHIFT;
-+ t->obj_id &= ~EXTRA_OBJECT_TYPE_MASK;
-+
-+ if (t->extra_obj_type == YAFFS_OBJECT_TYPE_HARDLINK)
-+ t->extra_equiv_id = ptt->n_bytes;
-+ else
-+ t->extra_file_size = ptt->n_bytes;
-+ }
-+ yaffs_dump_packed_tags2_tags_only(ptt);
-+ yaffs_dump_tags2(t);
-+}
-+
-+void yaffs_unpack_tags2(struct yaffs_ext_tags *t, struct yaffs_packed_tags2 *pt,
-+ int tags_ecc)
-+{
-+ enum yaffs_ecc_result ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
-+
-+ if (pt->t.seq_number != 0xffffffff && tags_ecc) {
-+ /* Chunk is in use and we need to do ECC */
-+
-+ struct yaffs_ecc_other ecc;
-+ int result;
-+ yaffs_ecc_calc_other((unsigned char *)&pt->t,
-+ sizeof(struct yaffs_packed_tags2_tags_only),
-+ &ecc);
-+ result =
-+ yaffs_ecc_correct_other((unsigned char *)&pt->t,
-+ sizeof(struct yaffs_packed_tags2_tags_only),
-+ &pt->ecc, &ecc);
-+ switch (result) {
-+ case 0:
-+ ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
-+ break;
-+ case 1:
-+ ecc_result = YAFFS_ECC_RESULT_FIXED;
-+ break;
-+ case -1:
-+ ecc_result = YAFFS_ECC_RESULT_UNFIXED;
-+ break;
-+ default:
-+ ecc_result = YAFFS_ECC_RESULT_UNKNOWN;
-+ }
-+ }
-+ yaffs_unpack_tags2_tags_only(t, &pt->t);
-+
-+ t->ecc_result = ecc_result;
-+
-+ yaffs_dump_packed_tags2(pt);
-+ yaffs_dump_tags2(t);
-+}
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_packedtags2.h linux-3.4.90/fs/yaffs2/yaffs_packedtags2.h
---- linux-3.4.90.orig/fs/yaffs2/yaffs_packedtags2.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_packedtags2.h 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,47 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+/* This is used to pack YAFFS2 tags, not YAFFS1tags. */
-+
-+#ifndef __YAFFS_PACKEDTAGS2_H__
-+#define __YAFFS_PACKEDTAGS2_H__
-+
-+#include "yaffs_guts.h"
-+#include "yaffs_ecc.h"
-+
-+struct yaffs_packed_tags2_tags_only {
-+ unsigned seq_number;
-+ unsigned obj_id;
-+ unsigned chunk_id;
-+ unsigned n_bytes;
-+};
-+
-+struct yaffs_packed_tags2 {
-+ struct yaffs_packed_tags2_tags_only t;
-+ struct yaffs_ecc_other ecc;
-+};
-+
-+/* Full packed tags with ECC, used for oob tags */
-+void yaffs_pack_tags2(struct yaffs_packed_tags2 *pt,
-+ const struct yaffs_ext_tags *t, int tags_ecc);
-+void yaffs_unpack_tags2(struct yaffs_ext_tags *t, struct yaffs_packed_tags2 *pt,
-+ int tags_ecc);
-+
-+/* Only the tags part (no ECC for use with inband tags */
-+void yaffs_pack_tags2_tags_only(struct yaffs_packed_tags2_tags_only *pt,
-+ const struct yaffs_ext_tags *t);
-+void yaffs_unpack_tags2_tags_only(struct yaffs_ext_tags *t,
-+ struct yaffs_packed_tags2_tags_only *pt);
-+#endif
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_summary.c linux-3.4.90/fs/yaffs2/yaffs_summary.c
---- linux-3.4.90.orig/fs/yaffs2/yaffs_summary.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_summary.c 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,312 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+/* Summaries write the useful part of the tags for the chunks in a block into an
-+ * an array which is written to the last n chunks of the block.
-+ * Reading the summaries gives all the tags for the block in one read. Much
-+ * faster.
-+ *
-+ * Chunks holding summaries are marked with tags making it look like
-+ * they are part of a fake file.
-+ *
-+ * The summary could also be used during gc.
-+ *
-+ */
-+
-+#include "yaffs_summary.h"
-+#include "yaffs_packedtags2.h"
-+#include "yaffs_nand.h"
-+#include "yaffs_getblockinfo.h"
-+#include "yaffs_bitmap.h"
-+
-+/*
-+ * The summary is built up in an array of summary tags.
-+ * This gets written to the last one or two (maybe more) chunks in a block.
-+ * A summary header is written as the first part of each chunk of summary data.
-+ * The summary header must match or the summary is rejected.
-+ */
-+
-+/* Summary tags don't need the sequence number because that is redundant. */
-+struct yaffs_summary_tags {
-+ unsigned obj_id;
-+ unsigned chunk_id;
-+ unsigned n_bytes;
-+};
-+
-+/* Summary header */
-+struct yaffs_summary_header {
-+ unsigned version; /* Must match current version */
-+ unsigned block; /* Must be this block */
-+ unsigned seq; /* Must be this sequence number */
-+ unsigned sum; /* Just add up all the bytes in the tags */
-+};
-+
-+
-+static void yaffs_summary_clear(struct yaffs_dev *dev)
-+{
-+ if (!dev->sum_tags)
-+ return;
-+ memset(dev->sum_tags, 0, dev->chunks_per_summary *
-+ sizeof(struct yaffs_summary_tags));
-+}
-+
-+
-+void yaffs_summary_deinit(struct yaffs_dev *dev)
-+{
-+ kfree(dev->sum_tags);
-+ dev->sum_tags = NULL;
-+ kfree(dev->gc_sum_tags);
-+ dev->gc_sum_tags = NULL;
-+ dev->chunks_per_summary = 0;
-+}
-+
-+int yaffs_summary_init(struct yaffs_dev *dev)
-+{
-+ int sum_bytes;
-+ int chunks_used; /* Number of chunks used by summary */
-+ int sum_tags_bytes;
-+
-+ sum_bytes = dev->param.chunks_per_block *
-+ sizeof(struct yaffs_summary_tags);
-+
-+ chunks_used = (sum_bytes + dev->data_bytes_per_chunk - 1)/
-+ (dev->data_bytes_per_chunk -
-+ sizeof(struct yaffs_summary_header));
-+
-+ dev->chunks_per_summary = dev->param.chunks_per_block - chunks_used;
-+ sum_tags_bytes = sizeof(struct yaffs_summary_tags) *
-+ dev->chunks_per_summary;
-+ dev->sum_tags = kmalloc(sum_tags_bytes, GFP_NOFS);
-+ dev->gc_sum_tags = kmalloc(sum_tags_bytes, GFP_NOFS);
-+ if (!dev->sum_tags || !dev->gc_sum_tags) {
-+ yaffs_summary_deinit(dev);
-+ return YAFFS_FAIL;
-+ }
-+
-+ yaffs_summary_clear(dev);
-+
-+ return YAFFS_OK;
-+}
-+
-+static unsigned yaffs_summary_sum(struct yaffs_dev *dev)
-+{
-+ u8 *sum_buffer = (u8 *)dev->sum_tags;
-+ int i;
-+ unsigned sum = 0;
-+
-+ i = sizeof(struct yaffs_summary_tags) *
-+ dev->chunks_per_summary;
-+ while (i > 0) {
-+ sum += *sum_buffer;
-+ sum_buffer++;
-+ i--;
-+ }
-+
-+ return sum;
-+}
-+
-+static int yaffs_summary_write(struct yaffs_dev *dev, int blk)
-+{
-+ struct yaffs_ext_tags tags;
-+ u8 *buffer;
-+ u8 *sum_buffer = (u8 *)dev->sum_tags;
-+ int n_bytes;
-+ int chunk_in_nand;
-+ int chunk_in_block;
-+ int result;
-+ int this_tx;
-+ struct yaffs_summary_header hdr;
-+ int sum_bytes_per_chunk = dev->data_bytes_per_chunk - sizeof(hdr);
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, blk);
-+
-+ buffer = yaffs_get_temp_buffer(dev);
-+ n_bytes = sizeof(struct yaffs_summary_tags) *
-+ dev->chunks_per_summary;
-+ memset(&tags, 0, sizeof(struct yaffs_ext_tags));
-+ tags.obj_id = YAFFS_OBJECTID_SUMMARY;
-+ tags.chunk_id = 1;
-+ chunk_in_block = dev->chunks_per_summary;
-+ chunk_in_nand = dev->alloc_block * dev->param.chunks_per_block +
-+ dev->chunks_per_summary;
-+ hdr.version = YAFFS_SUMMARY_VERSION;
-+ hdr.block = blk;
-+ hdr.seq = bi->seq_number;
-+ hdr.sum = yaffs_summary_sum(dev);
-+
-+ do {
-+ this_tx = n_bytes;
-+ if (this_tx > sum_bytes_per_chunk)
-+ this_tx = sum_bytes_per_chunk;
-+ memcpy(buffer, &hdr, sizeof(hdr));
-+ memcpy(buffer + sizeof(hdr), sum_buffer, this_tx);
-+ tags.n_bytes = this_tx + sizeof(hdr);
-+ result = yaffs_wr_chunk_tags_nand(dev, chunk_in_nand,
-+ buffer, &tags);
-+
-+ if (result != YAFFS_OK)
-+ break;
-+ yaffs_set_chunk_bit(dev, blk, chunk_in_block);
-+ bi->pages_in_use++;
-+ dev->n_free_chunks--;
-+
-+ n_bytes -= this_tx;
-+ sum_buffer += this_tx;
-+ chunk_in_nand++;
-+ chunk_in_block++;
-+ tags.chunk_id++;
-+ } while (result == YAFFS_OK && n_bytes > 0);
-+ yaffs_release_temp_buffer(dev, buffer);
-+
-+
-+ if (result == YAFFS_OK)
-+ bi->has_summary = 1;
-+
-+
-+ return result;
-+}
-+
-+int yaffs_summary_read(struct yaffs_dev *dev,
-+ struct yaffs_summary_tags *st,
-+ int blk)
-+{
-+ struct yaffs_ext_tags tags;
-+ u8 *buffer;
-+ u8 *sum_buffer = (u8 *)st;
-+ int n_bytes;
-+ int chunk_id;
-+ int chunk_in_nand;
-+ int chunk_in_block;
-+ int result;
-+ int this_tx;
-+ struct yaffs_summary_header hdr;
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, blk);
-+ int sum_bytes_per_chunk = dev->data_bytes_per_chunk - sizeof(hdr);
-+ int sum_tags_bytes;
-+
-+ sum_tags_bytes = sizeof(struct yaffs_summary_tags) *
-+ dev->chunks_per_summary;
-+ buffer = yaffs_get_temp_buffer(dev);
-+ n_bytes = sizeof(struct yaffs_summary_tags) * dev->chunks_per_summary;
-+ chunk_in_block = dev->chunks_per_summary;
-+ chunk_in_nand = blk * dev->param.chunks_per_block +
-+ dev->chunks_per_summary;
-+ chunk_id = 1;
-+ do {
-+ this_tx = n_bytes;
-+ if (this_tx > sum_bytes_per_chunk)
-+ this_tx = sum_bytes_per_chunk;
-+ result = yaffs_rd_chunk_tags_nand(dev, chunk_in_nand,
-+ buffer, &tags);
-+
-+ if (tags.chunk_id != chunk_id ||
-+ tags.obj_id != YAFFS_OBJECTID_SUMMARY ||
-+ tags.chunk_used == 0 ||
-+ tags.ecc_result > YAFFS_ECC_RESULT_FIXED ||
-+ tags.n_bytes != (this_tx + sizeof(hdr)))
-+ result = YAFFS_FAIL;
-+ if (result != YAFFS_OK)
-+ break;
-+
-+ if (st == dev->sum_tags) {
-+ /* If we're scanning then update the block info */
-+ yaffs_set_chunk_bit(dev, blk, chunk_in_block);
-+ bi->pages_in_use++;
-+ }
-+ memcpy(&hdr, buffer, sizeof(hdr));
-+ memcpy(sum_buffer, buffer + sizeof(hdr), this_tx);
-+ n_bytes -= this_tx;
-+ sum_buffer += this_tx;
-+ chunk_in_nand++;
-+ chunk_in_block++;
-+ chunk_id++;
-+ } while (result == YAFFS_OK && n_bytes > 0);
-+ yaffs_release_temp_buffer(dev, buffer);
-+
-+ if (result == YAFFS_OK) {
-+ /* Verify header */
-+ if (hdr.version != YAFFS_SUMMARY_VERSION ||
-+ hdr.seq != bi->seq_number ||
-+ hdr.sum != yaffs_summary_sum(dev))
-+ result = YAFFS_FAIL;
-+ }
-+
-+ if (st == dev->sum_tags && result == YAFFS_OK)
-+ bi->has_summary = 1;
-+
-+ return result;
-+}
-+
-+int yaffs_summary_add(struct yaffs_dev *dev,
-+ struct yaffs_ext_tags *tags,
-+ int chunk_in_nand)
-+{
-+ struct yaffs_packed_tags2_tags_only tags_only;
-+ struct yaffs_summary_tags *sum_tags;
-+ int block_in_nand = chunk_in_nand / dev->param.chunks_per_block;
-+ int chunk_in_block = chunk_in_nand % dev->param.chunks_per_block;
-+
-+ if (!dev->sum_tags)
-+ return YAFFS_OK;
-+
-+ if (chunk_in_block >= 0 && chunk_in_block < dev->chunks_per_summary) {
-+ yaffs_pack_tags2_tags_only(&tags_only, tags);
-+ sum_tags = &dev->sum_tags[chunk_in_block];
-+ sum_tags->chunk_id = tags_only.chunk_id;
-+ sum_tags->n_bytes = tags_only.n_bytes;
-+ sum_tags->obj_id = tags_only.obj_id;
-+
-+ if (chunk_in_block == dev->chunks_per_summary - 1) {
-+ /* Time to write out the summary */
-+ yaffs_summary_write(dev, block_in_nand);
-+ yaffs_summary_clear(dev);
-+ yaffs_skip_rest_of_block(dev);
-+ }
-+ }
-+ return YAFFS_OK;
-+}
-+
-+int yaffs_summary_fetch(struct yaffs_dev *dev,
-+ struct yaffs_ext_tags *tags,
-+ int chunk_in_block)
-+{
-+ struct yaffs_packed_tags2_tags_only tags_only;
-+ struct yaffs_summary_tags *sum_tags;
-+ if (chunk_in_block >= 0 && chunk_in_block < dev->chunks_per_summary) {
-+ sum_tags = &dev->sum_tags[chunk_in_block];
-+ tags_only.chunk_id = sum_tags->chunk_id;
-+ tags_only.n_bytes = sum_tags->n_bytes;
-+ tags_only.obj_id = sum_tags->obj_id;
-+ yaffs_unpack_tags2_tags_only(tags, &tags_only);
-+ return YAFFS_OK;
-+ }
-+ return YAFFS_FAIL;
-+}
-+
-+void yaffs_summary_gc(struct yaffs_dev *dev, int blk)
-+{
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, blk);
-+ int i;
-+
-+ if (!bi->has_summary)
-+ return;
-+
-+ for (i = dev->chunks_per_summary;
-+ i < dev->param.chunks_per_block;
-+ i++) {
-+ if (yaffs_check_chunk_bit(dev, blk, i)) {
-+ yaffs_clear_chunk_bit(dev, blk, i);
-+ bi->pages_in_use--;
-+ dev->n_free_chunks++;
-+ }
-+ }
-+}
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_summary.h linux-3.4.90/fs/yaffs2/yaffs_summary.h
---- linux-3.4.90.orig/fs/yaffs2/yaffs_summary.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_summary.h 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,37 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_SUMMARY_H__
-+#define __YAFFS_SUMMARY_H__
-+
-+#include "yaffs_packedtags2.h"
-+
-+
-+int yaffs_summary_init(struct yaffs_dev *dev);
-+void yaffs_summary_deinit(struct yaffs_dev *dev);
-+
-+int yaffs_summary_add(struct yaffs_dev *dev,
-+ struct yaffs_ext_tags *tags,
-+ int chunk_in_block);
-+int yaffs_summary_fetch(struct yaffs_dev *dev,
-+ struct yaffs_ext_tags *tags,
-+ int chunk_in_block);
-+int yaffs_summary_read(struct yaffs_dev *dev,
-+ struct yaffs_summary_tags *st,
-+ int blk);
-+void yaffs_summary_gc(struct yaffs_dev *dev, int blk);
-+
-+
-+#endif
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_tagscompat.c linux-3.4.90/fs/yaffs2/yaffs_tagscompat.c
---- linux-3.4.90.orig/fs/yaffs2/yaffs_tagscompat.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_tagscompat.c 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,381 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_guts.h"
-+#include "yaffs_tagscompat.h"
-+#include "yaffs_ecc.h"
-+#include "yaffs_getblockinfo.h"
-+#include "yaffs_trace.h"
-+
-+static void yaffs_handle_rd_data_error(struct yaffs_dev *dev, int nand_chunk);
-+
-+
-+/********** Tags ECC calculations *********/
-+
-+
-+void yaffs_calc_tags_ecc(struct yaffs_tags *tags)
-+{
-+ /* Calculate an ecc */
-+ unsigned char *b = ((union yaffs_tags_union *)tags)->as_bytes;
-+ unsigned i, j;
-+ unsigned ecc = 0;
-+ unsigned bit = 0;
-+
-+ tags->ecc = 0;
-+
-+ for (i = 0; i < 8; i++) {
-+ for (j = 1; j & 0xff; j <<= 1) {
-+ bit++;
-+ if (b[i] & j)
-+ ecc ^= bit;
-+ }
-+ }
-+ tags->ecc = ecc;
-+}
-+
-+int yaffs_check_tags_ecc(struct yaffs_tags *tags)
-+{
-+ unsigned ecc = tags->ecc;
-+
-+ yaffs_calc_tags_ecc(tags);
-+
-+ ecc ^= tags->ecc;
-+
-+ if (ecc && ecc <= 64) {
-+ /* TODO: Handle the failure better. Retire? */
-+ unsigned char *b = ((union yaffs_tags_union *)tags)->as_bytes;
-+
-+ ecc--;
-+
-+ b[ecc / 8] ^= (1 << (ecc & 7));
-+
-+ /* Now recvalc the ecc */
-+ yaffs_calc_tags_ecc(tags);
-+
-+ return 1; /* recovered error */
-+ } else if (ecc) {
-+ /* Wierd ecc failure value */
-+ /* TODO Need to do somethiong here */
-+ return -1; /* unrecovered error */
-+ }
-+ return 0;
-+}
-+
-+/********** Tags **********/
-+
-+static void yaffs_load_tags_to_spare(struct yaffs_spare *spare_ptr,
-+ struct yaffs_tags *tags_ptr)
-+{
-+ union yaffs_tags_union *tu = (union yaffs_tags_union *)tags_ptr;
-+
-+ yaffs_calc_tags_ecc(tags_ptr);
-+
-+ spare_ptr->tb0 = tu->as_bytes[0];
-+ spare_ptr->tb1 = tu->as_bytes[1];
-+ spare_ptr->tb2 = tu->as_bytes[2];
-+ spare_ptr->tb3 = tu->as_bytes[3];
-+ spare_ptr->tb4 = tu->as_bytes[4];
-+ spare_ptr->tb5 = tu->as_bytes[5];
-+ spare_ptr->tb6 = tu->as_bytes[6];
-+ spare_ptr->tb7 = tu->as_bytes[7];
-+}
-+
-+static void yaffs_get_tags_from_spare(struct yaffs_dev *dev,
-+ struct yaffs_spare *spare_ptr,
-+ struct yaffs_tags *tags_ptr)
-+{
-+ union yaffs_tags_union *tu = (union yaffs_tags_union *)tags_ptr;
-+ int result;
-+
-+ tu->as_bytes[0] = spare_ptr->tb0;
-+ tu->as_bytes[1] = spare_ptr->tb1;
-+ tu->as_bytes[2] = spare_ptr->tb2;
-+ tu->as_bytes[3] = spare_ptr->tb3;
-+ tu->as_bytes[4] = spare_ptr->tb4;
-+ tu->as_bytes[5] = spare_ptr->tb5;
-+ tu->as_bytes[6] = spare_ptr->tb6;
-+ tu->as_bytes[7] = spare_ptr->tb7;
-+
-+ result = yaffs_check_tags_ecc(tags_ptr);
-+ if (result > 0)
-+ dev->n_tags_ecc_fixed++;
-+ else if (result < 0)
-+ dev->n_tags_ecc_unfixed++;
-+}
-+
-+static void yaffs_spare_init(struct yaffs_spare *spare)
-+{
-+ memset(spare, 0xff, sizeof(struct yaffs_spare));
-+}
-+
-+static int yaffs_wr_nand(struct yaffs_dev *dev,
-+ int nand_chunk, const u8 *data,
-+ struct yaffs_spare *spare)
-+{
-+ int data_size = dev->data_bytes_per_chunk;
-+
-+ return dev->drv.drv_write_chunk_fn(dev, nand_chunk,
-+ data, data_size,
-+ (u8 *) spare, sizeof(*spare));
-+}
-+
-+static int yaffs_rd_chunk_nand(struct yaffs_dev *dev,
-+ int nand_chunk,
-+ u8 *data,
-+ struct yaffs_spare *spare,
-+ enum yaffs_ecc_result *ecc_result,
-+ int correct_errors)
-+{
-+ int ret_val;
-+ struct yaffs_spare local_spare;
-+ int data_size;
-+ int spare_size;
-+ int ecc_result1, ecc_result2;
-+ u8 calc_ecc[3];
-+
-+ if (!spare) {
-+ /* If we don't have a real spare, then we use a local one. */
-+ /* Need this for the calculation of the ecc */
-+ spare = &local_spare;
-+ }
-+ data_size = dev->data_bytes_per_chunk;
-+ spare_size = sizeof(struct yaffs_spare);
-+
-+ if (dev->param.use_nand_ecc)
-+ return dev->drv.drv_read_chunk_fn(dev, nand_chunk,
-+ data, data_size,
-+ (u8 *) spare, spare_size,
-+ ecc_result);
-+
-+
-+ /* Handle the ECC at this level. */
-+
-+ ret_val = dev->drv.drv_read_chunk_fn(dev, nand_chunk,
-+ data, data_size,
-+ (u8 *)spare, spare_size,
-+ NULL);
-+ if (!data || !correct_errors)
-+ return ret_val;
-+
-+ /* Do ECC correction if needed. */
-+ yaffs_ecc_calc(data, calc_ecc);
-+ ecc_result1 = yaffs_ecc_correct(data, spare->ecc1, calc_ecc);
-+ yaffs_ecc_calc(&data[256], calc_ecc);
-+ ecc_result2 = yaffs_ecc_correct(&data[256], spare->ecc2, calc_ecc);
-+
-+ if (ecc_result1 > 0) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "**>>yaffs ecc error fix performed on chunk %d:0",
-+ nand_chunk);
-+ dev->n_ecc_fixed++;
-+ } else if (ecc_result1 < 0) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "**>>yaffs ecc error unfixed on chunk %d:0",
-+ nand_chunk);
-+ dev->n_ecc_unfixed++;
-+ }
-+
-+ if (ecc_result2 > 0) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "**>>yaffs ecc error fix performed on chunk %d:1",
-+ nand_chunk);
-+ dev->n_ecc_fixed++;
-+ } else if (ecc_result2 < 0) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "**>>yaffs ecc error unfixed on chunk %d:1",
-+ nand_chunk);
-+ dev->n_ecc_unfixed++;
-+ }
-+
-+ if (ecc_result1 || ecc_result2) {
-+ /* We had a data problem on this page */
-+ yaffs_handle_rd_data_error(dev, nand_chunk);
-+ }
-+
-+ if (ecc_result1 < 0 || ecc_result2 < 0)
-+ *ecc_result = YAFFS_ECC_RESULT_UNFIXED;
-+ else if (ecc_result1 > 0 || ecc_result2 > 0)
-+ *ecc_result = YAFFS_ECC_RESULT_FIXED;
-+ else
-+ *ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
-+
-+ return ret_val;
-+}
-+
-+/*
-+ * Functions for robustisizing
-+ */
-+
-+static void yaffs_handle_rd_data_error(struct yaffs_dev *dev, int nand_chunk)
-+{
-+ int flash_block = nand_chunk / dev->param.chunks_per_block;
-+
-+ /* Mark the block for retirement */
-+ yaffs_get_block_info(dev, flash_block + dev->block_offset)->
-+ needs_retiring = 1;
-+ yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
-+ "**>>Block %d marked for retirement",
-+ flash_block);
-+
-+ /* TODO:
-+ * Just do a garbage collection on the affected block
-+ * then retire the block
-+ * NB recursion
-+ */
-+}
-+
-+static int yaffs_tags_compat_wr(struct yaffs_dev *dev,
-+ int nand_chunk,
-+ const u8 *data, const struct yaffs_ext_tags *ext_tags)
-+{
-+ struct yaffs_spare spare;
-+ struct yaffs_tags tags;
-+
-+ yaffs_spare_init(&spare);
-+
-+ if (ext_tags->is_deleted)
-+ spare.page_status = 0;
-+ else {
-+ tags.obj_id = ext_tags->obj_id;
-+ tags.chunk_id = ext_tags->chunk_id;
-+
-+ tags.n_bytes_lsb = ext_tags->n_bytes & (1024 - 1);
-+
-+ if (dev->data_bytes_per_chunk >= 1024)
-+ tags.n_bytes_msb = (ext_tags->n_bytes >> 10) & 3;
-+ else
-+ tags.n_bytes_msb = 3;
-+
-+ tags.serial_number = ext_tags->serial_number;
-+
-+ if (!dev->param.use_nand_ecc && data) {
-+ yaffs_ecc_calc(data, spare.ecc1);
-+ yaffs_ecc_calc(&data[256], spare.ecc2);
-+ }
-+
-+ yaffs_load_tags_to_spare(&spare, &tags);
-+ }
-+ return yaffs_wr_nand(dev, nand_chunk, data, &spare);
-+}
-+
-+static int yaffs_tags_compat_rd(struct yaffs_dev *dev,
-+ int nand_chunk,
-+ u8 *data, struct yaffs_ext_tags *ext_tags)
-+{
-+ struct yaffs_spare spare;
-+ struct yaffs_tags tags;
-+ enum yaffs_ecc_result ecc_result = YAFFS_ECC_RESULT_UNKNOWN;
-+ static struct yaffs_spare spare_ff;
-+ static int init;
-+ int deleted;
-+
-+ if (!init) {
-+ memset(&spare_ff, 0xff, sizeof(spare_ff));
-+ init = 1;
-+ }
-+
-+ if (!yaffs_rd_chunk_nand(dev, nand_chunk,
-+ data, &spare, &ecc_result, 1))
-+ return YAFFS_FAIL;
-+
-+ /* ext_tags may be NULL */
-+ if (!ext_tags)
-+ return YAFFS_OK;
-+
-+ deleted = (hweight8(spare.page_status) < 7) ? 1 : 0;
-+
-+ ext_tags->is_deleted = deleted;
-+ ext_tags->ecc_result = ecc_result;
-+ ext_tags->block_bad = 0; /* We're reading it */
-+ /* therefore it is not a bad block */
-+ ext_tags->chunk_used =
-+ memcmp(&spare_ff, &spare, sizeof(spare_ff)) ? 1 : 0;
-+
-+ if (ext_tags->chunk_used) {
-+ yaffs_get_tags_from_spare(dev, &spare, &tags);
-+ ext_tags->obj_id = tags.obj_id;
-+ ext_tags->chunk_id = tags.chunk_id;
-+ ext_tags->n_bytes = tags.n_bytes_lsb;
-+
-+ if (dev->data_bytes_per_chunk >= 1024)
-+ ext_tags->n_bytes |=
-+ (((unsigned)tags.n_bytes_msb) << 10);
-+
-+ ext_tags->serial_number = tags.serial_number;
-+ }
-+
-+ return YAFFS_OK;
-+}
-+
-+static int yaffs_tags_compat_mark_bad(struct yaffs_dev *dev, int flash_block)
-+{
-+ struct yaffs_spare spare;
-+
-+ memset(&spare, 0xff, sizeof(struct yaffs_spare));
-+
-+ spare.block_status = 'Y';
-+
-+ yaffs_wr_nand(dev, flash_block * dev->param.chunks_per_block, NULL,
-+ &spare);
-+ yaffs_wr_nand(dev, flash_block * dev->param.chunks_per_block + 1,
-+ NULL, &spare);
-+
-+ return YAFFS_OK;
-+}
-+
-+static int yaffs_tags_compat_query_block(struct yaffs_dev *dev,
-+ int block_no,
-+ enum yaffs_block_state *state,
-+ u32 *seq_number)
-+{
-+ struct yaffs_spare spare0, spare1;
-+ static struct yaffs_spare spare_ff;
-+ static int init;
-+ enum yaffs_ecc_result dummy;
-+
-+ if (!init) {
-+ memset(&spare_ff, 0xff, sizeof(spare_ff));
-+ init = 1;
-+ }
-+
-+ *seq_number = 0;
-+
-+ /* Look for bad block markers in the first two chunks */
-+ yaffs_rd_chunk_nand(dev, block_no * dev->param.chunks_per_block,
-+ NULL, &spare0, &dummy, 0);
-+ yaffs_rd_chunk_nand(dev, block_no * dev->param.chunks_per_block + 1,
-+ NULL, &spare1, &dummy, 0);
-+
-+ if (hweight8(spare0.block_status & spare1.block_status) < 7)
-+ *state = YAFFS_BLOCK_STATE_DEAD;
-+ else if (memcmp(&spare_ff, &spare0, sizeof(spare_ff)) == 0)
-+ *state = YAFFS_BLOCK_STATE_EMPTY;
-+ else
-+ *state = YAFFS_BLOCK_STATE_NEEDS_SCAN;
-+
-+ return YAFFS_OK;
-+}
-+
-+void yaffs_tags_compat_install(struct yaffs_dev *dev)
-+{
-+ if(dev->param.is_yaffs2)
-+ return;
-+ if(!dev->tagger.write_chunk_tags_fn)
-+ dev->tagger.write_chunk_tags_fn = yaffs_tags_compat_wr;
-+ if(!dev->tagger.read_chunk_tags_fn)
-+ dev->tagger.read_chunk_tags_fn = yaffs_tags_compat_rd;
-+ if(!dev->tagger.query_block_fn)
-+ dev->tagger.query_block_fn = yaffs_tags_compat_query_block;
-+ if(!dev->tagger.mark_bad_fn)
-+ dev->tagger.mark_bad_fn = yaffs_tags_compat_mark_bad;
-+}
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_tagscompat.h linux-3.4.90/fs/yaffs2/yaffs_tagscompat.h
---- linux-3.4.90.orig/fs/yaffs2/yaffs_tagscompat.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_tagscompat.h 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,44 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_TAGSCOMPAT_H__
-+#define __YAFFS_TAGSCOMPAT_H__
-+
-+
-+#include "yaffs_guts.h"
-+
-+#if 0
-+
-+
-+int yaffs_tags_compat_wr(struct yaffs_dev *dev,
-+ int nand_chunk,
-+ const u8 *data, const struct yaffs_ext_tags *tags);
-+int yaffs_tags_compat_rd(struct yaffs_dev *dev,
-+ int nand_chunk,
-+ u8 *data, struct yaffs_ext_tags *tags);
-+int yaffs_tags_compat_mark_bad(struct yaffs_dev *dev, int block_no);
-+int yaffs_tags_compat_query_block(struct yaffs_dev *dev,
-+ int block_no,
-+ enum yaffs_block_state *state,
-+ u32 *seq_number);
-+
-+#endif
-+
-+
-+void yaffs_tags_compat_install(struct yaffs_dev *dev);
-+void yaffs_calc_tags_ecc(struct yaffs_tags *tags);
-+int yaffs_check_tags_ecc(struct yaffs_tags *tags);
-+
-+#endif
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_tagsmarshall.c linux-3.4.90/fs/yaffs2/yaffs_tagsmarshall.c
---- linux-3.4.90.orig/fs/yaffs2/yaffs_tagsmarshall.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_tagsmarshall.c 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,199 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_guts.h"
-+#include "yaffs_trace.h"
-+#include "yaffs_packedtags2.h"
-+
-+static int yaffs_tags_marshall_write(struct yaffs_dev *dev,
-+ int nand_chunk, const u8 *data,
-+ const struct yaffs_ext_tags *tags)
-+{
-+ struct yaffs_packed_tags2 pt;
-+ int retval;
-+
-+ int packed_tags_size =
-+ dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt);
-+ void *packed_tags_ptr =
-+ dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt;
-+
-+ yaffs_trace(YAFFS_TRACE_MTD,
-+ "yaffs_tags_marshall_write chunk %d data %p tags %p",
-+ nand_chunk, data, tags);
-+
-+ /* For yaffs2 writing there must be both data and tags.
-+ * If we're using inband tags, then the tags are stuffed into
-+ * the end of the data buffer.
-+ */
-+ if (!data || !tags)
-+ BUG();
-+ else if (dev->param.inband_tags) {
-+ struct yaffs_packed_tags2_tags_only *pt2tp;
-+ pt2tp =
-+ (struct yaffs_packed_tags2_tags_only *)(data +
-+ dev->
-+ data_bytes_per_chunk);
-+ yaffs_pack_tags2_tags_only(pt2tp, tags);
-+ } else {
-+ yaffs_pack_tags2(&pt, tags, !dev->param.no_tags_ecc);
-+ }
-+
-+ retval = dev->drv.drv_write_chunk_fn(dev, nand_chunk,
-+ data, dev->param.total_bytes_per_chunk,
-+ (dev->param.inband_tags) ? NULL : packed_tags_ptr,
-+ (dev->param.inband_tags) ? 0 : packed_tags_size);
-+
-+ return retval;
-+}
-+
-+static int yaffs_tags_marshall_read(struct yaffs_dev *dev,
-+ int nand_chunk, u8 *data,
-+ struct yaffs_ext_tags *tags)
-+{
-+ int retval = 0;
-+ int local_data = 0;
-+ u8 spare_buffer[100];
-+ enum yaffs_ecc_result ecc_result;
-+
-+ struct yaffs_packed_tags2 pt;
-+
-+ int packed_tags_size =
-+ dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt);
-+ void *packed_tags_ptr =
-+ dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt;
-+
-+ yaffs_trace(YAFFS_TRACE_MTD,
-+ "yaffs_tags_marshall_read chunk %d data %p tags %p",
-+ nand_chunk, data, tags);
-+
-+ if (dev->param.inband_tags) {
-+ if (!data) {
-+ local_data = 1;
-+ data = yaffs_get_temp_buffer(dev);
-+ }
-+ }
-+
-+ if (dev->param.inband_tags || (data && !tags))
-+ retval = dev->drv.drv_read_chunk_fn(dev, nand_chunk,
-+ data, dev->param.total_bytes_per_chunk,
-+ NULL, 0,
-+ &ecc_result);
-+ else if (tags)
-+ retval = dev->drv.drv_read_chunk_fn(dev, nand_chunk,
-+ data, dev->param.total_bytes_per_chunk,
-+ spare_buffer, packed_tags_size,
-+ &ecc_result);
-+ else
-+ BUG();
-+
-+
-+ if (dev->param.inband_tags) {
-+ if (tags) {
-+ struct yaffs_packed_tags2_tags_only *pt2tp;
-+ pt2tp =
-+ (struct yaffs_packed_tags2_tags_only *)
-+ &data[dev->data_bytes_per_chunk];
-+ yaffs_unpack_tags2_tags_only(tags, pt2tp);
-+ }
-+ } else if (tags) {
-+ memcpy(packed_tags_ptr, spare_buffer, packed_tags_size);
-+ yaffs_unpack_tags2(tags, &pt, !dev->param.no_tags_ecc);
-+ }
-+
-+ if (local_data)
-+ yaffs_release_temp_buffer(dev, data);
-+
-+ if (tags && ecc_result == YAFFS_ECC_RESULT_UNFIXED) {
-+ tags->ecc_result = YAFFS_ECC_RESULT_UNFIXED;
-+ dev->n_ecc_unfixed++;
-+ }
-+
-+ if (tags && ecc_result == -YAFFS_ECC_RESULT_FIXED) {
-+ if (tags->ecc_result <= YAFFS_ECC_RESULT_NO_ERROR)
-+ tags->ecc_result = YAFFS_ECC_RESULT_FIXED;
-+ dev->n_ecc_fixed++;
-+ }
-+
-+ if (ecc_result < YAFFS_ECC_RESULT_UNFIXED)
-+ return YAFFS_OK;
-+ else
-+ return YAFFS_FAIL;
-+}
-+
-+static int yaffs_tags_marshall_query_block(struct yaffs_dev *dev, int block_no,
-+ enum yaffs_block_state *state,
-+ u32 *seq_number)
-+{
-+ int retval;
-+
-+ yaffs_trace(YAFFS_TRACE_MTD, "yaffs_tags_marshall_query_block %d",
-+ block_no);
-+
-+ retval = dev->drv.drv_check_bad_fn(dev, block_no);
-+
-+ if (retval== YAFFS_FAIL) {
-+ yaffs_trace(YAFFS_TRACE_MTD, "block is bad");
-+
-+ *state = YAFFS_BLOCK_STATE_DEAD;
-+ *seq_number = 0;
-+ } else {
-+ struct yaffs_ext_tags t;
-+
-+ yaffs_tags_marshall_read(dev,
-+ block_no * dev->param.chunks_per_block,
-+ NULL, &t);
-+
-+ if (t.chunk_used) {
-+ *seq_number = t.seq_number;
-+ *state = YAFFS_BLOCK_STATE_NEEDS_SCAN;
-+ } else {
-+ *seq_number = 0;
-+ *state = YAFFS_BLOCK_STATE_EMPTY;
-+ }
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_MTD,
-+ "block query returns seq %d state %d",
-+ *seq_number, *state);
-+
-+ if (retval == 0)
-+ return YAFFS_OK;
-+ else
-+ return YAFFS_FAIL;
-+}
-+
-+static int yaffs_tags_marshall_mark_bad(struct yaffs_dev *dev, int block_no)
-+{
-+ return dev->drv.drv_mark_bad_fn(dev, block_no);
-+
-+}
-+
-+
-+void yaffs_tags_marshall_install(struct yaffs_dev *dev)
-+{
-+ if (!dev->param.is_yaffs2)
-+ return;
-+
-+ if (!dev->tagger.write_chunk_tags_fn)
-+ dev->tagger.write_chunk_tags_fn = yaffs_tags_marshall_write;
-+
-+ if (!dev->tagger.read_chunk_tags_fn)
-+ dev->tagger.read_chunk_tags_fn = yaffs_tags_marshall_read;
-+
-+ if (!dev->tagger.query_block_fn)
-+ dev->tagger.query_block_fn = yaffs_tags_marshall_query_block;
-+
-+ if (!dev->tagger.mark_bad_fn)
-+ dev->tagger.mark_bad_fn = yaffs_tags_marshall_mark_bad;
-+
-+}
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_tagsmarshall.h linux-3.4.90/fs/yaffs2/yaffs_tagsmarshall.h
---- linux-3.4.90.orig/fs/yaffs2/yaffs_tagsmarshall.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_tagsmarshall.h 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,22 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_TAGSMARSHALL_H__
-+#define __YAFFS_TAGSMARSHALL_H__
-+
-+#include "yaffs_guts.h"
-+void yaffs_tags_marshall_install(struct yaffs_dev *dev);
-+
-+#endif
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_trace.h linux-3.4.90/fs/yaffs2/yaffs_trace.h
---- linux-3.4.90.orig/fs/yaffs2/yaffs_trace.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_trace.h 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,57 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YTRACE_H__
-+#define __YTRACE_H__
-+
-+extern unsigned int yaffs_trace_mask;
-+extern unsigned int yaffs_wr_attempts;
-+
-+/*
-+ * Tracing flags.
-+ * The flags masked in YAFFS_TRACE_ALWAYS are always traced.
-+ */
-+
-+#define YAFFS_TRACE_OS 0x00000002
-+#define YAFFS_TRACE_ALLOCATE 0x00000004
-+#define YAFFS_TRACE_SCAN 0x00000008
-+#define YAFFS_TRACE_BAD_BLOCKS 0x00000010
-+#define YAFFS_TRACE_ERASE 0x00000020
-+#define YAFFS_TRACE_GC 0x00000040
-+#define YAFFS_TRACE_WRITE 0x00000080
-+#define YAFFS_TRACE_TRACING 0x00000100
-+#define YAFFS_TRACE_DELETION 0x00000200
-+#define YAFFS_TRACE_BUFFERS 0x00000400
-+#define YAFFS_TRACE_NANDACCESS 0x00000800
-+#define YAFFS_TRACE_GC_DETAIL 0x00001000
-+#define YAFFS_TRACE_SCAN_DEBUG 0x00002000
-+#define YAFFS_TRACE_MTD 0x00004000
-+#define YAFFS_TRACE_CHECKPOINT 0x00008000
-+
-+#define YAFFS_TRACE_VERIFY 0x00010000
-+#define YAFFS_TRACE_VERIFY_NAND 0x00020000
-+#define YAFFS_TRACE_VERIFY_FULL 0x00040000
-+#define YAFFS_TRACE_VERIFY_ALL 0x000f0000
-+
-+#define YAFFS_TRACE_SYNC 0x00100000
-+#define YAFFS_TRACE_BACKGROUND 0x00200000
-+#define YAFFS_TRACE_LOCK 0x00400000
-+#define YAFFS_TRACE_MOUNT 0x00800000
-+
-+#define YAFFS_TRACE_ERROR 0x40000000
-+#define YAFFS_TRACE_BUG 0x80000000
-+#define YAFFS_TRACE_ALWAYS 0xf0000000
-+
-+#endif
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_verify.c linux-3.4.90/fs/yaffs2/yaffs_verify.c
---- linux-3.4.90.orig/fs/yaffs2/yaffs_verify.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_verify.c 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,529 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_verify.h"
-+#include "yaffs_trace.h"
-+#include "yaffs_bitmap.h"
-+#include "yaffs_getblockinfo.h"
-+#include "yaffs_nand.h"
-+
-+int yaffs_skip_verification(struct yaffs_dev *dev)
-+{
-+ (void) dev;
-+ return !(yaffs_trace_mask &
-+ (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL));
-+}
-+
-+static int yaffs_skip_full_verification(struct yaffs_dev *dev)
-+{
-+ (void) dev;
-+ return !(yaffs_trace_mask & (YAFFS_TRACE_VERIFY_FULL));
-+}
-+
-+static int yaffs_skip_nand_verification(struct yaffs_dev *dev)
-+{
-+ (void) dev;
-+ return !(yaffs_trace_mask & (YAFFS_TRACE_VERIFY_NAND));
-+}
-+
-+static const char * const block_state_name[] = {
-+ "Unknown",
-+ "Needs scan",
-+ "Scanning",
-+ "Empty",
-+ "Allocating",
-+ "Full",
-+ "Dirty",
-+ "Checkpoint",
-+ "Collecting",
-+ "Dead"
-+};
-+
-+void yaffs_verify_blk(struct yaffs_dev *dev, struct yaffs_block_info *bi, int n)
-+{
-+ int actually_used;
-+ int in_use;
-+
-+ if (yaffs_skip_verification(dev))
-+ return;
-+
-+ /* Report illegal runtime states */
-+ if (bi->block_state >= YAFFS_NUMBER_OF_BLOCK_STATES)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Block %d has undefined state %d",
-+ n, bi->block_state);
-+
-+ switch (bi->block_state) {
-+ case YAFFS_BLOCK_STATE_UNKNOWN:
-+ case YAFFS_BLOCK_STATE_SCANNING:
-+ case YAFFS_BLOCK_STATE_NEEDS_SCAN:
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Block %d has bad run-state %s",
-+ n, block_state_name[bi->block_state]);
-+ }
-+
-+ /* Check pages in use and soft deletions are legal */
-+
-+ actually_used = bi->pages_in_use - bi->soft_del_pages;
-+
-+ if (bi->pages_in_use < 0 ||
-+ bi->pages_in_use > dev->param.chunks_per_block ||
-+ bi->soft_del_pages < 0 ||
-+ bi->soft_del_pages > dev->param.chunks_per_block ||
-+ actually_used < 0 || actually_used > dev->param.chunks_per_block)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Block %d has illegal values pages_in_used %d soft_del_pages %d",
-+ n, bi->pages_in_use, bi->soft_del_pages);
-+
-+ /* Check chunk bitmap legal */
-+ in_use = yaffs_count_chunk_bits(dev, n);
-+ if (in_use != bi->pages_in_use)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Block %d has inconsistent values pages_in_use %d counted chunk bits %d",
-+ n, bi->pages_in_use, in_use);
-+}
-+
-+void yaffs_verify_collected_blk(struct yaffs_dev *dev,
-+ struct yaffs_block_info *bi, int n)
-+{
-+ yaffs_verify_blk(dev, bi, n);
-+
-+ /* After collection the block should be in the erased state */
-+
-+ if (bi->block_state != YAFFS_BLOCK_STATE_COLLECTING &&
-+ bi->block_state != YAFFS_BLOCK_STATE_EMPTY) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "Block %d is in state %d after gc, should be erased",
-+ n, bi->block_state);
-+ }
-+}
-+
-+void yaffs_verify_blocks(struct yaffs_dev *dev)
-+{
-+ int i;
-+ int state_count[YAFFS_NUMBER_OF_BLOCK_STATES];
-+ int illegal_states = 0;
-+
-+ if (yaffs_skip_verification(dev))
-+ return;
-+
-+ memset(state_count, 0, sizeof(state_count));
-+
-+ for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
-+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, i);
-+ yaffs_verify_blk(dev, bi, i);
-+
-+ if (bi->block_state < YAFFS_NUMBER_OF_BLOCK_STATES)
-+ state_count[bi->block_state]++;
-+ else
-+ illegal_states++;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_VERIFY, "Block summary");
-+
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "%d blocks have illegal states",
-+ illegal_states);
-+ if (state_count[YAFFS_BLOCK_STATE_ALLOCATING] > 1)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Too many allocating blocks");
-+
-+ for (i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "%s %d blocks",
-+ block_state_name[i], state_count[i]);
-+
-+ if (dev->blocks_in_checkpt != state_count[YAFFS_BLOCK_STATE_CHECKPOINT])
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Checkpoint block count wrong dev %d count %d",
-+ dev->blocks_in_checkpt,
-+ state_count[YAFFS_BLOCK_STATE_CHECKPOINT]);
-+
-+ if (dev->n_erased_blocks != state_count[YAFFS_BLOCK_STATE_EMPTY])
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Erased block count wrong dev %d count %d",
-+ dev->n_erased_blocks,
-+ state_count[YAFFS_BLOCK_STATE_EMPTY]);
-+
-+ if (state_count[YAFFS_BLOCK_STATE_COLLECTING] > 1)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Too many collecting blocks %d (max is 1)",
-+ state_count[YAFFS_BLOCK_STATE_COLLECTING]);
-+}
-+
-+/*
-+ * Verify the object header. oh must be valid, but obj and tags may be NULL in
-+ * which case those tests will not be performed.
-+ */
-+void yaffs_verify_oh(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh,
-+ struct yaffs_ext_tags *tags, int parent_check)
-+{
-+ if (obj && yaffs_skip_verification(obj->my_dev))
-+ return;
-+
-+ if (!(tags && obj && oh)) {
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Verifying object header tags %p obj %p oh %p",
-+ tags, obj, oh);
-+ return;
-+ }
-+
-+ if (oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN ||
-+ oh->type > YAFFS_OBJECT_TYPE_MAX)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d header type is illegal value 0x%x",
-+ tags->obj_id, oh->type);
-+
-+ if (tags->obj_id != obj->obj_id)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d header mismatch obj_id %d",
-+ tags->obj_id, obj->obj_id);
-+
-+ /*
-+ * Check that the object's parent ids match if parent_check requested.
-+ *
-+ * Tests do not apply to the root object.
-+ */
-+
-+ if (parent_check && tags->obj_id > 1 && !obj->parent)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d header mismatch parent_id %d obj->parent is NULL",
-+ tags->obj_id, oh->parent_obj_id);
-+
-+ if (parent_check && obj->parent &&
-+ oh->parent_obj_id != obj->parent->obj_id &&
-+ (oh->parent_obj_id != YAFFS_OBJECTID_UNLINKED ||
-+ obj->parent->obj_id != YAFFS_OBJECTID_DELETED))
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d header mismatch parent_id %d parent_obj_id %d",
-+ tags->obj_id, oh->parent_obj_id,
-+ obj->parent->obj_id);
-+
-+ if (tags->obj_id > 1 && oh->name[0] == 0) /* Null name */
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d header name is NULL",
-+ obj->obj_id);
-+
-+ if (tags->obj_id > 1 && ((u8) (oh->name[0])) == 0xff) /* Junk name */
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d header name is 0xff",
-+ obj->obj_id);
-+}
-+
-+void yaffs_verify_file(struct yaffs_obj *obj)
-+{
-+ u32 x;
-+ int required_depth;
-+ int actual_depth;
-+ int last_chunk;
-+ u32 offset_in_chunk;
-+ u32 the_chunk;
-+
-+ u32 i;
-+ struct yaffs_dev *dev;
-+ struct yaffs_ext_tags tags;
-+ struct yaffs_tnode *tn;
-+ u32 obj_id;
-+
-+ if (!obj)
-+ return;
-+
-+ if (yaffs_skip_verification(obj->my_dev))
-+ return;
-+
-+ dev = obj->my_dev;
-+ obj_id = obj->obj_id;
-+
-+
-+ /* Check file size is consistent with tnode depth */
-+ yaffs_addr_to_chunk(dev, obj->variant.file_variant.file_size,
-+ &last_chunk, &offset_in_chunk);
-+ last_chunk++;
-+ x = last_chunk >> YAFFS_TNODES_LEVEL0_BITS;
-+ required_depth = 0;
-+ while (x > 0) {
-+ x >>= YAFFS_TNODES_INTERNAL_BITS;
-+ required_depth++;
-+ }
-+
-+ actual_depth = obj->variant.file_variant.top_level;
-+
-+ /* Check that the chunks in the tnode tree are all correct.
-+ * We do this by scanning through the tnode tree and
-+ * checking the tags for every chunk match.
-+ */
-+
-+ if (yaffs_skip_nand_verification(dev))
-+ return;
-+
-+ for (i = 1; i <= last_chunk; i++) {
-+ tn = yaffs_find_tnode_0(dev, &obj->variant.file_variant, i);
-+
-+ if (!tn)
-+ continue;
-+
-+ the_chunk = yaffs_get_group_base(dev, tn, i);
-+ if (the_chunk > 0) {
-+ yaffs_rd_chunk_tags_nand(dev, the_chunk, NULL,
-+ &tags);
-+ if (tags.obj_id != obj_id || tags.chunk_id != i)
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Object %d chunk_id %d NAND mismatch chunk %d tags (%d:%d)",
-+ obj_id, i, the_chunk,
-+ tags.obj_id, tags.chunk_id);
-+ }
-+ }
-+}
-+
-+void yaffs_verify_link(struct yaffs_obj *obj)
-+{
-+ if (obj && yaffs_skip_verification(obj->my_dev))
-+ return;
-+
-+ /* Verify sane equivalent object */
-+}
-+
-+void yaffs_verify_symlink(struct yaffs_obj *obj)
-+{
-+ if (obj && yaffs_skip_verification(obj->my_dev))
-+ return;
-+
-+ /* Verify symlink string */
-+}
-+
-+void yaffs_verify_special(struct yaffs_obj *obj)
-+{
-+ if (obj && yaffs_skip_verification(obj->my_dev))
-+ return;
-+}
-+
-+void yaffs_verify_obj(struct yaffs_obj *obj)
-+{
-+ struct yaffs_dev *dev;
-+ u32 chunk_min;
-+ u32 chunk_max;
-+ u32 chunk_id_ok;
-+ u32 chunk_in_range;
-+ u32 chunk_wrongly_deleted;
-+ u32 chunk_valid;
-+
-+ if (!obj)
-+ return;
-+
-+ if (obj->being_created)
-+ return;
-+
-+ dev = obj->my_dev;
-+
-+ if (yaffs_skip_verification(dev))
-+ return;
-+
-+ /* Check sane object header chunk */
-+
-+ chunk_min = dev->internal_start_block * dev->param.chunks_per_block;
-+ chunk_max =
-+ (dev->internal_end_block + 1) * dev->param.chunks_per_block - 1;
-+
-+ chunk_in_range = (((unsigned)(obj->hdr_chunk)) >= chunk_min &&
-+ ((unsigned)(obj->hdr_chunk)) <= chunk_max);
-+ chunk_id_ok = chunk_in_range || (obj->hdr_chunk == 0);
-+ chunk_valid = chunk_in_range &&
-+ yaffs_check_chunk_bit(dev,
-+ obj->hdr_chunk / dev->param.chunks_per_block,
-+ obj->hdr_chunk % dev->param.chunks_per_block);
-+ chunk_wrongly_deleted = chunk_in_range && !chunk_valid;
-+
-+ if (!obj->fake && (!chunk_id_ok || chunk_wrongly_deleted))
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d has chunk_id %d %s %s",
-+ obj->obj_id, obj->hdr_chunk,
-+ chunk_id_ok ? "" : ",out of range",
-+ chunk_wrongly_deleted ? ",marked as deleted" : "");
-+
-+ if (chunk_valid && !yaffs_skip_nand_verification(dev)) {
-+ struct yaffs_ext_tags tags;
-+ struct yaffs_obj_hdr *oh;
-+ u8 *buffer = yaffs_get_temp_buffer(dev);
-+
-+ oh = (struct yaffs_obj_hdr *)buffer;
-+
-+ yaffs_rd_chunk_tags_nand(dev, obj->hdr_chunk, buffer, &tags);
-+
-+ yaffs_verify_oh(obj, oh, &tags, 1);
-+
-+ yaffs_release_temp_buffer(dev, buffer);
-+ }
-+
-+ /* Verify it has a parent */
-+ if (obj && !obj->fake && (!obj->parent || obj->parent->my_dev != dev)) {
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d has parent pointer %p which does not look like an object",
-+ obj->obj_id, obj->parent);
-+ }
-+
-+ /* Verify parent is a directory */
-+ if (obj->parent &&
-+ obj->parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d's parent is not a directory (type %d)",
-+ obj->obj_id, obj->parent->variant_type);
-+ }
-+
-+ switch (obj->variant_type) {
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ yaffs_verify_file(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ yaffs_verify_symlink(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ yaffs_verify_dir(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ yaffs_verify_link(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ yaffs_verify_special(obj);
-+ break;
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ default:
-+ yaffs_trace(YAFFS_TRACE_VERIFY,
-+ "Obj %d has illegaltype %d",
-+ obj->obj_id, obj->variant_type);
-+ break;
-+ }
-+}
-+
-+void yaffs_verify_objects(struct yaffs_dev *dev)
-+{
-+ struct yaffs_obj *obj;
-+ int i;
-+ struct list_head *lh;
-+
-+ if (yaffs_skip_verification(dev))
-+ return;
-+
-+ /* Iterate through the objects in each hash entry */
-+
-+ for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
-+ list_for_each(lh, &dev->obj_bucket[i].list) {
-+ obj = list_entry(lh, struct yaffs_obj, hash_link);
-+ yaffs_verify_obj(obj);
-+ }
-+ }
-+}
-+
-+void yaffs_verify_obj_in_dir(struct yaffs_obj *obj)
-+{
-+ struct list_head *lh;
-+ struct yaffs_obj *list_obj;
-+ int count = 0;
-+
-+ if (!obj) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "No object to verify");
-+ BUG();
-+ return;
-+ }
-+
-+ if (yaffs_skip_verification(obj->my_dev))
-+ return;
-+
-+ if (!obj->parent) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "Object does not have parent");
-+ BUG();
-+ return;
-+ }
-+
-+ if (obj->parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "Parent is not directory");
-+ BUG();
-+ }
-+
-+ /* Iterate through the objects in each hash entry */
-+
-+ list_for_each(lh, &obj->parent->variant.dir_variant.children) {
-+ list_obj = list_entry(lh, struct yaffs_obj, siblings);
-+ yaffs_verify_obj(list_obj);
-+ if (obj == list_obj)
-+ count++;
-+ }
-+
-+ if (count != 1) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "Object in directory %d times",
-+ count);
-+ BUG();
-+ }
-+}
-+
-+void yaffs_verify_dir(struct yaffs_obj *directory)
-+{
-+ struct list_head *lh;
-+ struct yaffs_obj *list_obj;
-+
-+ if (!directory) {
-+ BUG();
-+ return;
-+ }
-+
-+ if (yaffs_skip_full_verification(directory->my_dev))
-+ return;
-+
-+ if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "Directory has wrong type: %d",
-+ directory->variant_type);
-+ BUG();
-+ }
-+
-+ /* Iterate through the objects in each hash entry */
-+
-+ list_for_each(lh, &directory->variant.dir_variant.children) {
-+ list_obj = list_entry(lh, struct yaffs_obj, siblings);
-+ if (list_obj->parent != directory) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "Object in directory list has wrong parent %p",
-+ list_obj->parent);
-+ BUG();
-+ }
-+ yaffs_verify_obj_in_dir(list_obj);
-+ }
-+}
-+
-+static int yaffs_free_verification_failures;
-+
-+void yaffs_verify_free_chunks(struct yaffs_dev *dev)
-+{
-+ int counted;
-+ int difference;
-+
-+ if (yaffs_skip_verification(dev))
-+ return;
-+
-+ counted = yaffs_count_free_chunks(dev);
-+
-+ difference = dev->n_free_chunks - counted;
-+
-+ if (difference) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "Freechunks verification failure %d %d %d",
-+ dev->n_free_chunks, counted, difference);
-+ yaffs_free_verification_failures++;
-+ }
-+}
-+
-+int yaffs_verify_file_sane(struct yaffs_obj *in)
-+{
-+ (void) in;
-+ return YAFFS_OK;
-+}
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_verify.h linux-3.4.90/fs/yaffs2/yaffs_verify.h
---- linux-3.4.90.orig/fs/yaffs2/yaffs_verify.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_verify.h 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,43 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_VERIFY_H__
-+#define __YAFFS_VERIFY_H__
-+
-+#include "yaffs_guts.h"
-+
-+void yaffs_verify_blk(struct yaffs_dev *dev, struct yaffs_block_info *bi,
-+ int n);
-+void yaffs_verify_collected_blk(struct yaffs_dev *dev,
-+ struct yaffs_block_info *bi, int n);
-+void yaffs_verify_blocks(struct yaffs_dev *dev);
-+
-+void yaffs_verify_oh(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh,
-+ struct yaffs_ext_tags *tags, int parent_check);
-+void yaffs_verify_file(struct yaffs_obj *obj);
-+void yaffs_verify_link(struct yaffs_obj *obj);
-+void yaffs_verify_symlink(struct yaffs_obj *obj);
-+void yaffs_verify_special(struct yaffs_obj *obj);
-+void yaffs_verify_obj(struct yaffs_obj *obj);
-+void yaffs_verify_objects(struct yaffs_dev *dev);
-+void yaffs_verify_obj_in_dir(struct yaffs_obj *obj);
-+void yaffs_verify_dir(struct yaffs_obj *directory);
-+void yaffs_verify_free_chunks(struct yaffs_dev *dev);
-+
-+int yaffs_verify_file_sane(struct yaffs_obj *obj);
-+
-+int yaffs_skip_verification(struct yaffs_dev *dev);
-+
-+#endif
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_vfs.c linux-3.4.90/fs/yaffs2/yaffs_vfs.c
---- linux-3.4.90.orig/fs/yaffs2/yaffs_vfs.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_vfs.c 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,3600 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ * Acknowledgements:
-+ * Luc van OostenRyck for numerous patches.
-+ * Nick Bane for numerous patches.
-+ * Nick Bane for 2.5/2.6 integration.
-+ * Andras Toth for mknod rdev issue.
-+ * Michael Fischer for finding the problem with inode inconsistency.
-+ * Some code bodily lifted from JFFS
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+/*
-+ *
-+ * This is the file system front-end to YAFFS that hooks it up to
-+ * the VFS.
-+ *
-+ * Special notes:
-+ * >> 2.4: sb->u.generic_sbp points to the struct yaffs_dev associated with
-+ * this superblock
-+ * >> 2.6: sb->s_fs_info points to the struct yaffs_dev associated with this
-+ * superblock
-+ * >> inode->u.generic_ip points to the associated struct yaffs_obj.
-+ */
-+
-+/*
-+ * There are two variants of the VFS glue code. This variant should compile
-+ * for any version of Linux.
-+ */
-+#include <linux/version.h>
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 10))
-+#define YAFFS_COMPILE_BACKGROUND
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23))
-+#define YAFFS_COMPILE_FREEZER
-+#endif
-+#endif
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28))
-+#define YAFFS_COMPILE_EXPORTFS
-+#endif
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 35))
-+#define YAFFS_USE_SETATTR_COPY
-+#define YAFFS_USE_TRUNCATE_SETSIZE
-+#endif
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 35))
-+#define YAFFS_HAS_EVICT_INODE
-+#endif
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
-+#define YAFFS_NEW_FOLLOW_LINK 1
-+#else
-+#define YAFFS_NEW_FOLLOW_LINK 0
-+#endif
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 6, 0))
-+#define YAFFS_HAS_WRITE_SUPER
-+#endif
-+
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
-+#include <linux/config.h>
-+#endif
-+
-+#include <linux/kernel.h>
-+#include <linux/module.h>
-+#include <linux/slab.h>
-+#include <linux/init.h>
-+#include <linux/fs.h>
-+#include <linux/proc_fs.h>
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 39))
-+#include <linux/smp_lock.h>
-+#endif
-+#include <linux/pagemap.h>
-+#include <linux/mtd/mtd.h>
-+#include <linux/interrupt.h>
-+#include <linux/string.h>
-+#include <linux/ctype.h>
-+
-+#if (YAFFS_NEW_FOLLOW_LINK == 1)
-+#include <linux/namei.h>
-+#endif
-+
-+#ifdef YAFFS_COMPILE_EXPORTFS
-+#include <linux/exportfs.h>
-+#endif
-+
-+#ifdef YAFFS_COMPILE_BACKGROUND
-+#include <linux/kthread.h>
-+#include <linux/delay.h>
-+#endif
-+#ifdef YAFFS_COMPILE_FREEZER
-+#include <linux/freezer.h>
-+#endif
-+
-+#include <asm/div64.h>
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+
-+#include <linux/statfs.h>
-+
-+#define UnlockPage(p) unlock_page(p)
-+#define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags)
-+
-+/* FIXME: use sb->s_id instead ? */
-+#define yaffs_devname(sb, buf) bdevname(sb->s_bdev, buf)
-+
-+#else
-+
-+#include <linux/locks.h>
-+#define BDEVNAME_SIZE 0
-+#define yaffs_devname(sb, buf) kdevname(sb->s_dev)
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0))
-+/* added NCB 26/5/2006 for 2.4.25-vrs2-tcl1 kernel */
-+#define __user
-+#endif
-+
-+#endif
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26))
-+#define YPROC_ROOT (&proc_root)
-+#else
-+#define YPROC_ROOT NULL
-+#endif
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26))
-+#define Y_INIT_TIMER(a) init_timer(a)
-+#else
-+#define Y_INIT_TIMER(a) init_timer_on_stack(a)
-+#endif
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 27))
-+#define YAFFS_USE_WRITE_BEGIN_END 1
-+#else
-+#define YAFFS_USE_WRITE_BEGIN_END 0
-+#endif
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 6, 0))
-+#define YAFFS_SUPER_HAS_DIRTY
-+#endif
-+
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 2, 0))
-+#define set_nlink(inode, count) do { (inode)->i_nlink = (count); } while(0)
-+#endif
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28))
-+static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size)
-+{
-+ uint64_t result = partition_size;
-+ do_div(result, block_size);
-+ return (uint32_t) result;
-+}
-+#else
-+#define YCALCBLOCKS(s, b) ((s)/(b))
-+#endif
-+
-+#include <linux/uaccess.h>
-+#include <linux/mtd/mtd.h>
-+
-+#include "yportenv.h"
-+#include "yaffs_trace.h"
-+#include "yaffs_guts.h"
-+#include "yaffs_attribs.h"
-+
-+#include "yaffs_linux.h"
-+
-+#include "yaffs_mtdif.h"
-+#include "yaffs_packedtags2.h"
-+#include "yaffs_getblockinfo.h"
-+
-+unsigned int yaffs_trace_mask =
-+ YAFFS_TRACE_BAD_BLOCKS |
-+ YAFFS_TRACE_ALWAYS |
-+ 0;
-+
-+unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS;
-+unsigned int yaffs_auto_checkpoint = 1;
-+unsigned int yaffs_gc_control = 1;
-+unsigned int yaffs_bg_enable = 1;
-+unsigned int yaffs_auto_select = 1;
-+/* Module Parameters */
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+module_param(yaffs_trace_mask, uint, 0644);
-+module_param(yaffs_wr_attempts, uint, 0644);
-+module_param(yaffs_auto_checkpoint, uint, 0644);
-+module_param(yaffs_gc_control, uint, 0644);
-+module_param(yaffs_bg_enable, uint, 0644);
-+#else
-+MODULE_PARM(yaffs_trace_mask, "i");
-+MODULE_PARM(yaffs_wr_attempts, "i");
-+MODULE_PARM(yaffs_auto_checkpoint, "i");
-+MODULE_PARM(yaffs_gc_control, "i");
-+#endif
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
-+/* use iget and read_inode */
-+#define Y_IGET(sb, inum) iget((sb), (inum))
-+
-+#else
-+/* Call local equivalent */
-+#define YAFFS_USE_OWN_IGET
-+#define Y_IGET(sb, inum) yaffs_iget((sb), (inum))
-+
-+#endif
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
-+#define yaffs_inode_to_obj_lv(iptr) ((iptr)->i_private)
-+#else
-+#define yaffs_inode_to_obj_lv(iptr) ((iptr)->u.generic_ip)
-+#endif
-+
-+#define yaffs_inode_to_obj(iptr) \
-+ ((struct yaffs_obj *)(yaffs_inode_to_obj_lv(iptr)))
-+#define yaffs_dentry_to_obj(dptr) yaffs_inode_to_obj((dptr)->d_inode)
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+#define yaffs_super_to_dev(sb) ((struct yaffs_dev *)sb->s_fs_info)
-+#else
-+#define yaffs_super_to_dev(sb) ((struct yaffs_dev *)sb->u.generic_sbp)
-+#endif
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0))
-+#define Y_CLEAR_INODE(i) clear_inode(i)
-+#else
-+#define Y_CLEAR_INODE(i) end_writeback(i)
-+#endif
-+
-+
-+#define update_dir_time(dir) do {\
-+ (dir)->i_ctime = (dir)->i_mtime = CURRENT_TIME; \
-+ } while (0)
-+
-+static void yaffs_fill_inode_from_obj(struct inode *inode,
-+ struct yaffs_obj *obj);
-+
-+
-+static void yaffs_gross_lock(struct yaffs_dev *dev)
-+{
-+ yaffs_trace(YAFFS_TRACE_LOCK, "yaffs locking %p", current);
-+ mutex_lock(&(yaffs_dev_to_lc(dev)->gross_lock));
-+ yaffs_trace(YAFFS_TRACE_LOCK, "yaffs locked %p", current);
-+}
-+
-+static void yaffs_gross_unlock(struct yaffs_dev *dev)
-+{
-+ yaffs_trace(YAFFS_TRACE_LOCK, "yaffs unlocking %p", current);
-+ mutex_unlock(&(yaffs_dev_to_lc(dev)->gross_lock));
-+}
-+
-+
-+static int yaffs_readpage_nolock(struct file *f, struct page *pg)
-+{
-+ /* Lifted from jffs2 */
-+
-+ struct yaffs_obj *obj;
-+ unsigned char *pg_buf;
-+ int ret;
-+ loff_t pos = ((loff_t) pg->index) << PAGE_CACHE_SHIFT;
-+ struct yaffs_dev *dev;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readpage_nolock at %lld, size %08x",
-+ (long long)pos,
-+ (unsigned)PAGE_CACHE_SIZE);
-+
-+ obj = yaffs_dentry_to_obj(f->f_dentry);
-+
-+ dev = obj->my_dev;
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+ BUG_ON(!PageLocked(pg));
-+#else
-+ if (!PageLocked(pg))
-+ PAGE_BUG(pg);
-+#endif
-+
-+ pg_buf = kmap(pg);
-+ /* FIXME: Can kmap fail? */
-+
-+ yaffs_gross_lock(dev);
-+
-+ ret = yaffs_file_rd(obj, pg_buf, pos, PAGE_CACHE_SIZE);
-+
-+ yaffs_gross_unlock(dev);
-+
-+ if (ret >= 0)
-+ ret = 0;
-+
-+ if (ret) {
-+ ClearPageUptodate(pg);
-+ SetPageError(pg);
-+ } else {
-+ SetPageUptodate(pg);
-+ ClearPageError(pg);
-+ }
-+
-+ flush_dcache_page(pg);
-+ kunmap(pg);
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage_nolock done");
-+ return ret;
-+}
-+
-+static int yaffs_readpage_unlock(struct file *f, struct page *pg)
-+{
-+ int ret = yaffs_readpage_nolock(f, pg);
-+ UnlockPage(pg);
-+ return ret;
-+}
-+
-+static int yaffs_readpage(struct file *f, struct page *pg)
-+{
-+ int ret;
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage");
-+ ret = yaffs_readpage_unlock(f, pg);
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage done");
-+ return ret;
-+}
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0))
-+#define YCRED_FSUID() from_kuid(&init_user_ns, current_fsuid())
-+#define YCRED_FSGID() from_kgid(&init_user_ns, current_fsgid())
-+#else
-+#define YCRED_FSUID() YCRED(current)->fsuid
-+#define YCRED_FSGID() YCRED(current)->fsgid
-+
-+static inline uid_t i_uid_read(const struct inode *inode)
-+{
-+ return inode->i_uid;
-+}
-+
-+static inline gid_t i_gid_read(const struct inode *inode)
-+{
-+ return inode->i_gid;
-+}
-+
-+static inline void i_uid_write(struct inode *inode, uid_t uid)
-+{
-+ inode->i_uid = uid;
-+}
-+
-+static inline void i_gid_write(struct inode *inode, gid_t gid)
-+{
-+ inode->i_gid = gid;
-+}
-+#endif
-+
-+static void yaffs_set_super_dirty_val(struct yaffs_dev *dev, int val)
-+{
-+ struct yaffs_linux_context *lc = yaffs_dev_to_lc(dev);
-+
-+ if (lc)
-+ lc->dirty = val;
-+
-+# ifdef YAFFS_SUPER_HAS_DIRTY
-+ {
-+ struct super_block *sb = lc->super;
-+
-+ if (sb)
-+ sb->s_dirt = val;
-+ }
-+#endif
-+
-+}
-+
-+static void yaffs_set_super_dirty(struct yaffs_dev *dev)
-+{
-+ yaffs_set_super_dirty_val(dev, 1);
-+}
-+
-+static void yaffs_clear_super_dirty(struct yaffs_dev *dev)
-+{
-+ yaffs_set_super_dirty_val(dev, 0);
-+}
-+
-+static int yaffs_check_super_dirty(struct yaffs_dev *dev)
-+{
-+ struct yaffs_linux_context *lc = yaffs_dev_to_lc(dev);
-+
-+ if (lc && lc->dirty)
-+ return 1;
-+
-+# ifdef YAFFS_SUPER_HAS_DIRTY
-+ {
-+ struct super_block *sb = lc->super;
-+
-+ if (sb && sb->s_dirt)
-+ return 1;
-+ }
-+#endif
-+ return 0;
-+
-+}
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
-+#else
-+static int yaffs_writepage(struct page *page)
-+#endif
-+{
-+ struct yaffs_dev *dev;
-+ struct address_space *mapping = page->mapping;
-+ struct inode *inode;
-+ unsigned long end_index;
-+ char *buffer;
-+ struct yaffs_obj *obj;
-+ int n_written = 0;
-+ unsigned n_bytes;
-+ loff_t i_size;
-+
-+ if (!mapping)
-+ BUG();
-+ inode = mapping->host;
-+ if (!inode)
-+ BUG();
-+ i_size = i_size_read(inode);
-+
-+ end_index = i_size >> PAGE_CACHE_SHIFT;
-+
-+ if (page->index < end_index)
-+ n_bytes = PAGE_CACHE_SIZE;
-+ else {
-+ n_bytes = i_size & (PAGE_CACHE_SIZE - 1);
-+
-+ if (page->index > end_index || !n_bytes) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_writepage at %lld, inode size = %lld!!",
-+ ((loff_t)page->index) << PAGE_CACHE_SHIFT,
-+ inode->i_size);
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ " -> don't care!!");
-+
-+ zero_user_segment(page, 0, PAGE_CACHE_SIZE);
-+ set_page_writeback(page);
-+ unlock_page(page);
-+ end_page_writeback(page);
-+ return 0;
-+ }
-+ }
-+
-+ if (n_bytes != PAGE_CACHE_SIZE)
-+ zero_user_segment(page, n_bytes, PAGE_CACHE_SIZE);
-+
-+ get_page(page);
-+
-+ buffer = kmap(page);
-+
-+ obj = yaffs_inode_to_obj(inode);
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_writepage at %lld, size %08x",
-+ ((loff_t)page->index) << PAGE_CACHE_SHIFT, n_bytes);
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "writepag0: obj = %lld, ino = %lld",
-+ obj->variant.file_variant.file_size, inode->i_size);
-+
-+ n_written = yaffs_wr_file(obj, buffer,
-+ ((loff_t)page->index) << PAGE_CACHE_SHIFT, n_bytes, 0);
-+
-+ yaffs_set_super_dirty(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "writepag1: obj = %lld, ino = %lld",
-+ obj->variant.file_variant.file_size, inode->i_size);
-+
-+ yaffs_gross_unlock(dev);
-+
-+ kunmap(page);
-+ set_page_writeback(page);
-+ unlock_page(page);
-+ end_page_writeback(page);
-+ put_page(page);
-+
-+ return (n_written == n_bytes) ? 0 : -ENOSPC;
-+}
-+
-+/* Space holding and freeing is done to ensure we have space available for write_begin/end */
-+/* For now we just assume few parallel writes and check against a small number. */
-+/* Todo: need to do this with a counter to handle parallel reads better */
-+
-+static ssize_t yaffs_hold_space(struct file *f)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev;
-+
-+ int n_free_chunks;
-+
-+ obj = yaffs_dentry_to_obj(f->f_dentry);
-+
-+ dev = obj->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ n_free_chunks = yaffs_get_n_free_chunks(dev);
-+
-+ yaffs_gross_unlock(dev);
-+
-+ return (n_free_chunks > 20) ? 1 : 0;
-+}
-+
-+static void yaffs_release_space(struct file *f)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev;
-+
-+ obj = yaffs_dentry_to_obj(f->f_dentry);
-+
-+ dev = obj->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ yaffs_gross_unlock(dev);
-+}
-+
-+#if (YAFFS_USE_WRITE_BEGIN_END > 0)
-+static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
-+ loff_t pos, unsigned len, unsigned flags,
-+ struct page **pagep, void **fsdata)
-+{
-+ struct page *pg = NULL;
-+ pgoff_t index = pos >> PAGE_CACHE_SHIFT;
-+
-+ int ret = 0;
-+ int space_held = 0;
-+
-+ /* Get a page */
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
-+ pg = grab_cache_page_write_begin(mapping, index, flags);
-+#else
-+ pg = __grab_cache_page(mapping, index);
-+#endif
-+
-+ *pagep = pg;
-+ if (!pg) {
-+ ret = -ENOMEM;
-+ goto out;
-+ }
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "start yaffs_write_begin index %d(%x) uptodate %d",
-+ (int)index, (int)index, Page_Uptodate(pg) ? 1 : 0);
-+
-+ /* Get fs space */
-+ space_held = yaffs_hold_space(filp);
-+
-+ if (!space_held) {
-+ ret = -ENOSPC;
-+ goto out;
-+ }
-+
-+ /* Update page if required */
-+
-+ if (!Page_Uptodate(pg))
-+ ret = yaffs_readpage_nolock(filp, pg);
-+
-+ if (ret)
-+ goto out;
-+
-+ /* Happy path return */
-+ yaffs_trace(YAFFS_TRACE_OS, "end yaffs_write_begin - ok");
-+
-+ return 0;
-+
-+out:
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "end yaffs_write_begin fail returning %d", ret);
-+ if (space_held)
-+ yaffs_release_space(filp);
-+ if (pg) {
-+ unlock_page(pg);
-+ page_cache_release(pg);
-+ }
-+ return ret;
-+}
-+
-+#else
-+
-+static int yaffs_prepare_write(struct file *f, struct page *pg,
-+ unsigned offset, unsigned to)
-+{
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_prepair_write");
-+
-+ if (!Page_Uptodate(pg))
-+ return yaffs_readpage_nolock(f, pg);
-+ return 0;
-+}
-+#endif
-+
-+
-+static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
-+ loff_t * pos)
-+{
-+ struct yaffs_obj *obj;
-+ int n_written;
-+ loff_t ipos;
-+ struct inode *inode;
-+ struct yaffs_dev *dev;
-+
-+ obj = yaffs_dentry_to_obj(f->f_dentry);
-+
-+ if (!obj) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_file_write: hey obj is null!");
-+ return -EINVAL;
-+ }
-+
-+ dev = obj->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ inode = f->f_dentry->d_inode;
-+
-+ if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND)
-+ ipos = inode->i_size;
-+ else
-+ ipos = *pos;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_file_write about to write writing %u(%x) bytes to object %d at %lld",
-+ (unsigned)n, (unsigned)n, obj->obj_id, ipos);
-+
-+ n_written = yaffs_wr_file(obj, buf, ipos, n, 0);
-+
-+ yaffs_set_super_dirty(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_file_write: %d(%x) bytes written",
-+ (unsigned)n, (unsigned)n);
-+
-+ if (n_written > 0) {
-+ ipos += n_written;
-+ *pos = ipos;
-+ if (ipos > inode->i_size) {
-+ inode->i_size = ipos;
-+ inode->i_blocks = (ipos + 511) >> 9;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_file_write size updated to %lld bytes, %d blocks",
-+ ipos, (int)(inode->i_blocks));
-+ }
-+
-+ }
-+ yaffs_gross_unlock(dev);
-+ return (n_written == 0) && (n > 0) ? -ENOSPC : n_written;
-+}
-+
-+
-+#if (YAFFS_USE_WRITE_BEGIN_END > 0)
-+static int yaffs_write_end(struct file *filp, struct address_space *mapping,
-+ loff_t pos, unsigned len, unsigned copied,
-+ struct page *pg, void *fsdadata)
-+{
-+ int ret = 0;
-+ void *addr, *kva;
-+ uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1);
-+
-+ kva = kmap(pg);
-+ addr = kva + offset_into_page;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_write_end addr %p pos %lld n_bytes %d",
-+ addr, pos, copied);
-+
-+ ret = yaffs_file_write(filp, addr, copied, &pos);
-+
-+ if (ret != copied) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_write_end not same size ret %d copied %d",
-+ ret, copied);
-+ SetPageError(pg);
-+ }
-+
-+ kunmap(pg);
-+
-+ yaffs_release_space(filp);
-+ unlock_page(pg);
-+ page_cache_release(pg);
-+ return ret;
-+}
-+#else
-+
-+static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
-+ unsigned to)
-+{
-+ void *addr, *kva;
-+
-+ loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset;
-+ int n_bytes = to - offset;
-+ int n_written;
-+
-+ kva = kmap(pg);
-+ addr = kva + offset;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_commit_write addr %p pos %lld n_bytes %d",
-+ addr, pos, n_bytes);
-+
-+ n_written = yaffs_file_write(f, addr, n_bytes, &pos);
-+
-+ if (n_written != n_bytes) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_commit_write not same size n_written %d n_bytes %d",
-+ n_written, n_bytes);
-+ SetPageError(pg);
-+ }
-+ kunmap(pg);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_commit_write returning %d",
-+ n_written == n_bytes ? 0 : n_written);
-+
-+ return n_written == n_bytes ? 0 : n_written;
-+}
-+#endif
-+
-+static struct address_space_operations yaffs_file_address_operations = {
-+ .readpage = yaffs_readpage,
-+ .writepage = yaffs_writepage,
-+#if (YAFFS_USE_WRITE_BEGIN_END > 0)
-+ .write_begin = yaffs_write_begin,
-+ .write_end = yaffs_write_end,
-+#else
-+ .prepare_write = yaffs_prepare_write,
-+ .commit_write = yaffs_commit_write,
-+#endif
-+};
-+
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-+static int yaffs_file_flush(struct file *file, fl_owner_t id)
-+#else
-+static int yaffs_file_flush(struct file *file)
-+#endif
-+{
-+ struct yaffs_obj *obj = yaffs_dentry_to_obj(file->f_dentry);
-+
-+ struct yaffs_dev *dev = obj->my_dev;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_file_flush object %d (%s)",
-+ obj->obj_id,
-+ obj->dirty ? "dirty" : "clean");
-+
-+ yaffs_gross_lock(dev);
-+
-+ yaffs_flush_file(obj, 1, 0);
-+
-+ yaffs_gross_unlock(dev);
-+
-+ return 0;
-+}
-+
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
-+static int yaffs_sync_object(struct file *file, loff_t start, loff_t end, int datasync)
-+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
-+static int yaffs_sync_object(struct file *file, int datasync)
-+#else
-+static int yaffs_sync_object(struct file *file, struct dentry *dentry,
-+ int datasync)
-+#endif
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev;
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
-+ struct dentry *dentry = file->f_path.dentry;
-+#endif
-+
-+ obj = yaffs_dentry_to_obj(dentry);
-+
-+ dev = obj->my_dev;
-+
-+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC,
-+ "yaffs_sync_object");
-+ yaffs_gross_lock(dev);
-+ yaffs_flush_file(obj, 1, datasync);
-+ yaffs_gross_unlock(dev);
-+ return 0;
-+}
-+
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 22))
-+static const struct file_operations yaffs_file_operations = {
-+ .read = do_sync_read,
-+ .write = do_sync_write,
-+ .aio_read = generic_file_aio_read,
-+ .aio_write = generic_file_aio_write,
-+ .mmap = generic_file_mmap,
-+ .flush = yaffs_file_flush,
-+ .fsync = yaffs_sync_object,
-+ .splice_read = generic_file_splice_read,
-+ .splice_write = generic_file_splice_write,
-+ .llseek = generic_file_llseek,
-+};
-+
-+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
-+
-+static const struct file_operations yaffs_file_operations = {
-+ .read = do_sync_read,
-+ .write = do_sync_write,
-+ .aio_read = generic_file_aio_read,
-+ .aio_write = generic_file_aio_write,
-+ .mmap = generic_file_mmap,
-+ .flush = yaffs_file_flush,
-+ .fsync = yaffs_sync_object,
-+ .sendfile = generic_file_sendfile,
-+};
-+
-+#else
-+
-+static const struct file_operations yaffs_file_operations = {
-+ .read = generic_file_read,
-+ .write = generic_file_write,
-+ .mmap = generic_file_mmap,
-+ .flush = yaffs_file_flush,
-+ .fsync = yaffs_sync_object,
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+ .sendfile = generic_file_sendfile,
-+#endif
-+};
-+#endif
-+
-+
-+
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
-+static void zero_user_segment(struct page *page, unsigned start, unsigned end)
-+{
-+ void *kaddr = kmap_atomic(page, KM_USER0);
-+ memset(kaddr + start, 0, end - start);
-+ kunmap_atomic(kaddr, KM_USER0);
-+ flush_dcache_page(page);
-+}
-+#endif
-+
-+
-+static int yaffs_vfs_setsize(struct inode *inode, loff_t newsize)
-+{
-+#ifdef YAFFS_USE_TRUNCATE_SETSIZE
-+ truncate_setsize(inode, newsize);
-+ return 0;
-+#else
-+ truncate_inode_pages(&inode->i_data, newsize);
-+ return 0;
-+#endif
-+
-+}
-+
-+
-+static int yaffs_vfs_setattr(struct inode *inode, struct iattr *attr)
-+{
-+#ifdef YAFFS_USE_SETATTR_COPY
-+ setattr_copy(inode, attr);
-+ return 0;
-+#else
-+ return inode_setattr(inode, attr);
-+#endif
-+
-+}
-+
-+static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
-+{
-+ struct inode *inode = dentry->d_inode;
-+ int error = 0;
-+ struct yaffs_dev *dev;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_setattr of object %d",
-+ yaffs_inode_to_obj(inode)->obj_id);
-+#if 0
-+ /* Fail if a requested resize >= 2GB */
-+ if (attr->ia_valid & ATTR_SIZE && (attr->ia_size >> 31))
-+ error = -EINVAL;
-+#endif
-+
-+ if (error == 0)
-+ error = inode_change_ok(inode, attr);
-+ if (error == 0) {
-+ int result;
-+ if (!error) {
-+ error = yaffs_vfs_setattr(inode, attr);
-+ yaffs_trace(YAFFS_TRACE_OS, "inode_setattr called");
-+ if (attr->ia_valid & ATTR_SIZE) {
-+ yaffs_vfs_setsize(inode, attr->ia_size);
-+ inode->i_blocks = (inode->i_size + 511) >> 9;
-+ }
-+ }
-+ dev = yaffs_inode_to_obj(inode)->my_dev;
-+ if (attr->ia_valid & ATTR_SIZE) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "resize to %d(%x)",
-+ (int)(attr->ia_size),
-+ (int)(attr->ia_size));
-+ }
-+ yaffs_gross_lock(dev);
-+ result = yaffs_set_attribs(yaffs_inode_to_obj(inode), attr);
-+ if (result == YAFFS_OK) {
-+ error = 0;
-+ } else {
-+ error = -EPERM;
-+ }
-+ yaffs_gross_unlock(dev);
-+
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_setattr done returning %d", error);
-+
-+ return error;
-+}
-+
-+static int yaffs_setxattr(struct dentry *dentry, const char *name,
-+ const void *value, size_t size, int flags)
-+{
-+ struct inode *inode = dentry->d_inode;
-+ int error = 0;
-+ struct yaffs_dev *dev;
-+ struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_setxattr of object %d", obj->obj_id);
-+
-+ if (error == 0) {
-+ int result;
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+ result = yaffs_set_xattrib(obj, name, value, size, flags);
-+ if (result == YAFFS_OK)
-+ error = 0;
-+ else if (result < 0)
-+ error = result;
-+ yaffs_gross_unlock(dev);
-+
-+ }
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_setxattr done returning %d", error);
-+
-+ return error;
-+}
-+
-+static ssize_t yaffs_getxattr(struct dentry * dentry, const char *name,
-+ void *buff, size_t size)
-+{
-+ struct inode *inode = dentry->d_inode;
-+ int error = 0;
-+ struct yaffs_dev *dev;
-+ struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_getxattr \"%s\" from object %d",
-+ name, obj->obj_id);
-+
-+ if (error == 0) {
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+ error = yaffs_get_xattrib(obj, name, buff, size);
-+ yaffs_gross_unlock(dev);
-+
-+ }
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_getxattr done returning %d", error);
-+
-+ return error;
-+}
-+
-+static int yaffs_removexattr(struct dentry *dentry, const char *name)
-+{
-+ struct inode *inode = dentry->d_inode;
-+ int error = 0;
-+ struct yaffs_dev *dev;
-+ struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_removexattr of object %d", obj->obj_id);
-+
-+ if (error == 0) {
-+ int result;
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+ result = yaffs_remove_xattrib(obj, name);
-+ if (result == YAFFS_OK)
-+ error = 0;
-+ else if (result < 0)
-+ error = result;
-+ yaffs_gross_unlock(dev);
-+
-+ }
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_removexattr done returning %d", error);
-+
-+ return error;
-+}
-+
-+static ssize_t yaffs_listxattr(struct dentry * dentry, char *buff, size_t size)
-+{
-+ struct inode *inode = dentry->d_inode;
-+ int error = 0;
-+ struct yaffs_dev *dev;
-+ struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_listxattr of object %d", obj->obj_id);
-+
-+ if (error == 0) {
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+ error = yaffs_list_xattrib(obj, buff, size);
-+ yaffs_gross_unlock(dev);
-+
-+ }
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_listxattr done returning %d", error);
-+
-+ return error;
-+}
-+
-+
-+static const struct inode_operations yaffs_file_inode_operations = {
-+ .setattr = yaffs_setattr,
-+ .setxattr = yaffs_setxattr,
-+ .getxattr = yaffs_getxattr,
-+ .listxattr = yaffs_listxattr,
-+ .removexattr = yaffs_removexattr,
-+};
-+
-+
-+static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
-+ int buflen)
-+{
-+ unsigned char *alias;
-+ int ret;
-+
-+ struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry));
-+
-+ yaffs_gross_unlock(dev);
-+
-+ if (!alias)
-+ return -ENOMEM;
-+
-+ ret = vfs_readlink(dentry, buffer, buflen, alias);
-+ kfree(alias);
-+ return ret;
-+}
-+
-+#if (YAFFS_NEW_FOLLOW_LINK == 1)
-+static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
-+{
-+ void *ret;
-+#else
-+static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
-+{
-+ int ret
-+#endif
-+ unsigned char *alias;
-+ int ret_int = 0;
-+ struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry));
-+ yaffs_gross_unlock(dev);
-+
-+ if (!alias) {
-+ ret_int = -ENOMEM;
-+ goto out;
-+ }
-+#if (YAFFS_NEW_FOLLOW_LINK == 1)
-+ nd_set_link(nd, alias);
-+ ret = alias;
-+out:
-+ if (ret_int)
-+ ret = ERR_PTR(ret_int);
-+ return ret;
-+#else
-+ ret = vfs_follow_link(nd, alias);
-+ kfree(alias);
-+out:
-+ if (ret_int)
-+ ret = ret_int;
-+ return ret;
-+#endif
-+}
-+
-+
-+#ifdef YAFFS_HAS_PUT_INODE
-+
-+/* For now put inode is just for debugging
-+ * Put inode is called when the inode **structure** is put.
-+ */
-+static void yaffs_put_inode(struct inode *inode)
-+{
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_put_inode: ino %d, count %d"),
-+ (int)inode->i_ino, atomic_read(&inode->i_count);
-+
-+}
-+#endif
-+
-+#if (YAFFS_NEW_FOLLOW_LINK == 1)
-+void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias)
-+{
-+ kfree(alias);
-+}
-+#endif
-+
-+static const struct inode_operations yaffs_symlink_inode_operations = {
-+ .readlink = yaffs_readlink,
-+ .follow_link = yaffs_follow_link,
-+#if (YAFFS_NEW_FOLLOW_LINK == 1)
-+ .put_link = yaffs_put_link,
-+#endif
-+ .setattr = yaffs_setattr,
-+ .setxattr = yaffs_setxattr,
-+ .getxattr = yaffs_getxattr,
-+ .listxattr = yaffs_listxattr,
-+ .removexattr = yaffs_removexattr,
-+};
-+
-+#ifdef YAFFS_USE_OWN_IGET
-+
-+static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino)
-+{
-+ struct inode *inode;
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_iget for %lu", ino);
-+
-+ inode = iget_locked(sb, ino);
-+ if (!inode)
-+ return ERR_PTR(-ENOMEM);
-+ if (!(inode->i_state & I_NEW))
-+ return inode;
-+
-+ /* NB This is called as a side effect of other functions, but
-+ * we had to release the lock to prevent deadlocks, so
-+ * need to lock again.
-+ */
-+
-+ yaffs_gross_lock(dev);
-+
-+ obj = yaffs_find_by_number(dev, inode->i_ino);
-+
-+ yaffs_fill_inode_from_obj(inode, obj);
-+
-+ yaffs_gross_unlock(dev);
-+
-+ unlock_new_inode(inode);
-+ return inode;
-+}
-+
-+#else
-+
-+static void yaffs_read_inode(struct inode *inode)
-+{
-+ /* NB This is called as a side effect of other functions, but
-+ * we had to release the lock to prevent deadlocks, so
-+ * need to lock again.
-+ */
-+
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev = yaffs_super_to_dev(inode->i_sb);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_read_inode for %d", (int)inode->i_ino);
-+
-+ if (current != yaffs_dev_to_lc(dev)->readdir_process)
-+ yaffs_gross_lock(dev);
-+
-+ obj = yaffs_find_by_number(dev, inode->i_ino);
-+
-+ yaffs_fill_inode_from_obj(inode, obj);
-+
-+ if (current != yaffs_dev_to_lc(dev)->readdir_process)
-+ yaffs_gross_unlock(dev);
-+}
-+
-+#endif
-+
-+
-+
-+struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
-+ struct yaffs_obj *obj)
-+{
-+ struct inode *inode;
-+
-+ if (!sb) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_get_inode for NULL super_block!!");
-+ return NULL;
-+
-+ }
-+
-+ if (!obj) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_get_inode for NULL object!!");
-+ return NULL;
-+
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_get_inode for object %d", obj->obj_id);
-+
-+ inode = Y_IGET(sb, obj->obj_id);
-+ if (IS_ERR(inode))
-+ return NULL;
-+
-+ /* NB Side effect: iget calls back to yaffs_read_inode(). */
-+ /* iget also increments the inode's i_count */
-+ /* NB You can't be holding gross_lock or deadlock will happen! */
-+
-+ return inode;
-+}
-+
-+
-+
-+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
-+#define YCRED(x) x
-+#else
-+#define YCRED(x) (x->cred)
-+#endif
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 4, 0))
-+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
-+ dev_t rdev)
-+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
-+ dev_t rdev)
-+#else
-+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
-+ int rdev)
-+#endif
-+{
-+ struct inode *inode;
-+
-+ struct yaffs_obj *obj = NULL;
-+ struct yaffs_dev *dev;
-+
-+ struct yaffs_obj *parent = yaffs_inode_to_obj(dir);
-+
-+ int error = -ENOSPC;
-+ uid_t uid = YCRED_FSUID();
-+ gid_t gid =
-+ (dir->i_mode & S_ISGID) ? i_gid_read(dir) : YCRED_FSGID();
-+
-+ if ((dir->i_mode & S_ISGID) && S_ISDIR(mode))
-+ mode |= S_ISGID;
-+
-+ if (parent) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_mknod: parent object %d type %d",
-+ parent->obj_id, parent->variant_type);
-+ } else {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_mknod: could not get parent object");
-+ return -EPERM;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_mknod: making oject for %s, mode %x dev %x",
-+ dentry->d_name.name, mode, rdev);
-+
-+ dev = parent->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ switch (mode & S_IFMT) {
-+ default:
-+ /* Special (socket, fifo, device...) */
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making special");
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+ obj =
-+ yaffs_create_special(parent, dentry->d_name.name, mode, uid,
-+ gid, old_encode_dev(rdev));
-+#else
-+ obj =
-+ yaffs_create_special(parent, dentry->d_name.name, mode, uid,
-+ gid, rdev);
-+#endif
-+ break;
-+ case S_IFREG: /* file */
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making file");
-+ obj = yaffs_create_file(parent, dentry->d_name.name, mode, uid,
-+ gid);
-+ break;
-+ case S_IFDIR: /* directory */
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making directory");
-+ obj = yaffs_create_dir(parent, dentry->d_name.name, mode,
-+ uid, gid);
-+ break;
-+ case S_IFLNK: /* symlink */
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making symlink");
-+ obj = NULL; /* Do we ever get here? */
-+ break;
-+ }
-+
-+ /* Can not call yaffs_get_inode() with gross lock held */
-+ yaffs_gross_unlock(dev);
-+
-+ if (obj) {
-+ inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
-+ d_instantiate(dentry, inode);
-+ update_dir_time(dir);
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_mknod created object %d count = %d",
-+ obj->obj_id, atomic_read(&inode->i_count));
-+ error = 0;
-+ yaffs_fill_inode_from_obj(dir, parent);
-+ } else {
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod failed making object");
-+ error = -ENOMEM;
-+ }
-+
-+ return error;
-+}
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 4, 0))
-+static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
-+#else
-+static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
-+#endif
-+{
-+ int ret_val;
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_mkdir");
-+ ret_val = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
-+ return ret_val;
-+}
-+
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 6, 0))
-+static int yaffs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-+ bool dummy)
-+#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 4, 0))
-+static int yaffs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-+ struct nameidata *n)
-+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
-+ struct nameidata *n)
-+#else
-+static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode)
-+#endif
-+{
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_create");
-+ return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
-+}
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 6, 0))
-+static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
-+ unsigned int dummy)
-+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
-+ struct nameidata *n)
-+#else
-+static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
-+#endif
-+{
-+ struct yaffs_obj *obj;
-+ struct inode *inode = NULL; /* NCB 2.5/2.6 needs NULL here */
-+
-+ struct yaffs_dev *dev = yaffs_inode_to_obj(dir)->my_dev;
-+
-+ if (current != yaffs_dev_to_lc(dev)->readdir_process)
-+ yaffs_gross_lock(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_lookup for %d:%s",
-+ yaffs_inode_to_obj(dir)->obj_id, dentry->d_name.name);
-+
-+ obj = yaffs_find_by_name(yaffs_inode_to_obj(dir), dentry->d_name.name);
-+
-+ obj = yaffs_get_equivalent_obj(obj); /* in case it was a hardlink */
-+
-+ /* Can't hold gross lock when calling yaffs_get_inode() */
-+ if (current != yaffs_dev_to_lc(dev)->readdir_process)
-+ yaffs_gross_unlock(dev);
-+
-+ if (obj) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_lookup found %d", obj->obj_id);
-+
-+ inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
-+ } else {
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_lookup not found");
-+
-+ }
-+
-+/* added NCB for 2.5/6 compatability - forces add even if inode is
-+ * NULL which creates dentry hash */
-+ d_add(dentry, inode);
-+
-+ return NULL;
-+}
-+
-+/*
-+ * Create a link...
-+ */
-+static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
-+ struct dentry *dentry)
-+{
-+ struct inode *inode = old_dentry->d_inode;
-+ struct yaffs_obj *obj = NULL;
-+ struct yaffs_obj *link = NULL;
-+ struct yaffs_dev *dev;
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_link");
-+
-+ obj = yaffs_inode_to_obj(inode);
-+ dev = obj->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ if (!S_ISDIR(inode->i_mode)) /* Don't link directories */
-+ link =
-+ yaffs_link_obj(yaffs_inode_to_obj(dir), dentry->d_name.name,
-+ obj);
-+
-+ if (link) {
-+ set_nlink(old_dentry->d_inode, yaffs_get_obj_link_count(obj));
-+ d_instantiate(dentry, old_dentry->d_inode);
-+ atomic_inc(&old_dentry->d_inode->i_count);
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_link link count %d i_count %d",
-+ old_dentry->d_inode->i_nlink,
-+ atomic_read(&old_dentry->d_inode->i_count));
-+ }
-+
-+ yaffs_gross_unlock(dev);
-+
-+ if (link) {
-+ update_dir_time(dir);
-+ return 0;
-+ }
-+
-+ return -EPERM;
-+}
-+
-+static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
-+ const char *symname)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev;
-+ uid_t uid = YCRED_FSUID();
-+ gid_t gid =
-+ (dir->i_mode & S_ISGID) ? i_gid_read(dir) : YCRED_FSGID();
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_symlink");
-+
-+ if (strnlen(dentry->d_name.name, YAFFS_MAX_NAME_LENGTH + 1) >
-+ YAFFS_MAX_NAME_LENGTH)
-+ return -ENAMETOOLONG;
-+
-+ if (strnlen(symname, YAFFS_MAX_ALIAS_LENGTH + 1) >
-+ YAFFS_MAX_ALIAS_LENGTH)
-+ return -ENAMETOOLONG;
-+
-+ dev = yaffs_inode_to_obj(dir)->my_dev;
-+ yaffs_gross_lock(dev);
-+ obj = yaffs_create_symlink(yaffs_inode_to_obj(dir), dentry->d_name.name,
-+ S_IFLNK | S_IRWXUGO, uid, gid, symname);
-+ yaffs_gross_unlock(dev);
-+
-+ if (obj) {
-+ struct inode *inode;
-+
-+ inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
-+ d_instantiate(dentry, inode);
-+ update_dir_time(dir);
-+ yaffs_trace(YAFFS_TRACE_OS, "symlink created OK");
-+ return 0;
-+ } else {
-+ yaffs_trace(YAFFS_TRACE_OS, "symlink not created");
-+ }
-+
-+ return -ENOMEM;
-+}
-+
-+/*
-+ * The VFS layer already does all the dentry stuff for rename.
-+ *
-+ * NB: POSIX says you can rename an object over an old object of the same name
-+ */
-+static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
-+ struct inode *new_dir, struct dentry *new_dentry)
-+{
-+ struct yaffs_dev *dev;
-+ int ret_val = YAFFS_FAIL;
-+ struct yaffs_obj *target;
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_rename");
-+ dev = yaffs_inode_to_obj(old_dir)->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ /* Check if the target is an existing directory that is not empty. */
-+ target = yaffs_find_by_name(yaffs_inode_to_obj(new_dir),
-+ new_dentry->d_name.name);
-+
-+ if (target && target->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY &&
-+ !list_empty(&target->variant.dir_variant.children)) {
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "target is non-empty dir");
-+
-+ ret_val = YAFFS_FAIL;
-+ } else {
-+ /* Now does unlinking internally using shadowing mechanism */
-+ yaffs_trace(YAFFS_TRACE_OS, "calling yaffs_rename_obj");
-+
-+ ret_val = yaffs_rename_obj(yaffs_inode_to_obj(old_dir),
-+ old_dentry->d_name.name,
-+ yaffs_inode_to_obj(new_dir),
-+ new_dentry->d_name.name);
-+ }
-+ yaffs_gross_unlock(dev);
-+
-+ if (ret_val == YAFFS_OK) {
-+ if (target)
-+ inode_dec_link_count(new_dentry->d_inode);
-+
-+ update_dir_time(old_dir);
-+ if (old_dir != new_dir)
-+ update_dir_time(new_dir);
-+ return 0;
-+ } else {
-+ return -ENOTEMPTY;
-+ }
-+}
-+
-+
-+
-+
-+static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
-+{
-+ int ret_val;
-+
-+ struct yaffs_dev *dev;
-+ struct yaffs_obj *obj;
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_unlink %d:%s",
-+ (int)(dir->i_ino), dentry->d_name.name);
-+ obj = yaffs_inode_to_obj(dir);
-+ dev = obj->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ ret_val = yaffs_unlinker(obj, dentry->d_name.name);
-+
-+ if (ret_val == YAFFS_OK) {
-+ inode_dec_link_count(dentry->d_inode);
-+ dir->i_version++;
-+ yaffs_gross_unlock(dev);
-+ update_dir_time(dir);
-+ return 0;
-+ }
-+ yaffs_gross_unlock(dev);
-+ return -ENOTEMPTY;
-+}
-+
-+
-+
-+static const struct inode_operations yaffs_dir_inode_operations = {
-+ .create = yaffs_create,
-+ .lookup = yaffs_lookup,
-+ .link = yaffs_link,
-+ .unlink = yaffs_unlink,
-+ .symlink = yaffs_symlink,
-+ .mkdir = yaffs_mkdir,
-+ .rmdir = yaffs_unlink,
-+ .mknod = yaffs_mknod,
-+ .rename = yaffs_rename,
-+ .setattr = yaffs_setattr,
-+ .setxattr = yaffs_setxattr,
-+ .getxattr = yaffs_getxattr,
-+ .listxattr = yaffs_listxattr,
-+ .removexattr = yaffs_removexattr,
-+};
-+
-+/*-----------------------------------------------------------------*/
-+/* Directory search context allows us to unlock access to yaffs during
-+ * filldir without causing problems with the directory being modified.
-+ * This is similar to the tried and tested mechanism used in yaffs direct.
-+ *
-+ * A search context iterates along a doubly linked list of siblings in the
-+ * directory. If the iterating object is deleted then this would corrupt
-+ * the list iteration, likely causing a crash. The search context avoids
-+ * this by using the remove_obj_fn to move the search context to the
-+ * next object before the object is deleted.
-+ *
-+ * Many readdirs (and thus seach conexts) may be alive simulateously so
-+ * each struct yaffs_dev has a list of these.
-+ *
-+ * A seach context lives for the duration of a readdir.
-+ *
-+ * All these functions must be called while yaffs is locked.
-+ */
-+
-+struct yaffs_search_context {
-+ struct yaffs_dev *dev;
-+ struct yaffs_obj *dir_obj;
-+ struct yaffs_obj *next_return;
-+ struct list_head others;
-+};
-+
-+/*
-+ * yaffs_new_search() creates a new search context, initialises it and
-+ * adds it to the device's search context list.
-+ *
-+ * Called at start of readdir.
-+ */
-+static struct yaffs_search_context *yaffs_new_search(struct yaffs_obj *dir)
-+{
-+ struct yaffs_dev *dev = dir->my_dev;
-+ struct yaffs_search_context *sc =
-+ kmalloc(sizeof(struct yaffs_search_context), GFP_NOFS);
-+ if (sc) {
-+ sc->dir_obj = dir;
-+ sc->dev = dev;
-+ if (list_empty(&sc->dir_obj->variant.dir_variant.children))
-+ sc->next_return = NULL;
-+ else
-+ sc->next_return =
-+ list_entry(dir->variant.dir_variant.children.next,
-+ struct yaffs_obj, siblings);
-+ INIT_LIST_HEAD(&sc->others);
-+ list_add(&sc->others, &(yaffs_dev_to_lc(dev)->search_contexts));
-+ }
-+ return sc;
-+}
-+
-+/*
-+ * yaffs_search_end() disposes of a search context and cleans up.
-+ */
-+static void yaffs_search_end(struct yaffs_search_context *sc)
-+{
-+ if (sc) {
-+ list_del(&sc->others);
-+ kfree(sc);
-+ }
-+}
-+
-+/*
-+ * yaffs_search_advance() moves a search context to the next object.
-+ * Called when the search iterates or when an object removal causes
-+ * the search context to be moved to the next object.
-+ */
-+static void yaffs_search_advance(struct yaffs_search_context *sc)
-+{
-+ if (!sc)
-+ return;
-+
-+ if (sc->next_return == NULL ||
-+ list_empty(&sc->dir_obj->variant.dir_variant.children))
-+ sc->next_return = NULL;
-+ else {
-+ struct list_head *next = sc->next_return->siblings.next;
-+
-+ if (next == &sc->dir_obj->variant.dir_variant.children)
-+ sc->next_return = NULL; /* end of list */
-+ else
-+ sc->next_return =
-+ list_entry(next, struct yaffs_obj, siblings);
-+ }
-+}
-+
-+/*
-+ * yaffs_remove_obj_callback() is called when an object is unlinked.
-+ * We check open search contexts and advance any which are currently
-+ * on the object being iterated.
-+ */
-+static void yaffs_remove_obj_callback(struct yaffs_obj *obj)
-+{
-+
-+ struct list_head *i;
-+ struct yaffs_search_context *sc;
-+ struct list_head *search_contexts =
-+ &(yaffs_dev_to_lc(obj->my_dev)->search_contexts);
-+
-+ /* Iterate through the directory search contexts.
-+ * If any are currently on the object being removed, then advance
-+ * the search context to the next object to prevent a hanging pointer.
-+ */
-+ list_for_each(i, search_contexts) {
-+ sc = list_entry(i, struct yaffs_search_context, others);
-+ if (sc->next_return == obj)
-+ yaffs_search_advance(sc);
-+ }
-+
-+}
-+
-+
-+/*-----------------------------------------------------------------*/
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 12, 0))
-+static int yaffs_readdir(struct file *file, struct dir_context *ctx)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev;
-+ struct yaffs_search_context *sc;
-+ struct inode *inode = file->f_dentry->d_inode;
-+ unsigned long offset, curoffs;
-+ struct yaffs_obj *l;
-+ int ret_val = 0;
-+
-+ char name[YAFFS_MAX_NAME_LENGTH + 1];
-+
-+ obj = yaffs_dentry_to_obj(file->f_dentry);
-+ dev = obj->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ yaffs_dev_to_lc(dev)->readdir_process = current;
-+
-+ offset = ctx->pos;
-+
-+ sc = yaffs_new_search(obj);
-+ if (!sc) {
-+ ret_val = -ENOMEM;
-+ goto out;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readdir: starting at %d", (int)offset);
-+
-+ if (offset == 0) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readdir: entry . ino %d",
-+ (int)inode->i_ino);
-+ yaffs_gross_unlock(dev);
-+ if (!dir_emit_dot(file, ctx)) {
-+ yaffs_gross_lock(dev);
-+ goto out;
-+ }
-+ yaffs_gross_lock(dev);
-+ offset++;
-+ ctx->pos++;
-+ }
-+ if (offset == 1) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readdir: entry .. ino %d",
-+ (int)file->f_dentry->d_parent->d_inode->i_ino);
-+ yaffs_gross_unlock(dev);
-+ if (!dir_emit_dotdot(file, ctx)) {
-+ yaffs_gross_lock(dev);
-+ goto out;
-+ }
-+ yaffs_gross_lock(dev);
-+ offset++;
-+ ctx->pos++;
-+ }
-+
-+ curoffs = 1;
-+
-+ /* If the directory has changed since the open or last call to
-+ readdir, rewind to after the 2 canned entries. */
-+ if (file->f_version != inode->i_version) {
-+ offset = 2;
-+ ctx->pos = offset;
-+ file->f_version = inode->i_version;
-+ }
-+
-+ while (sc->next_return) {
-+ curoffs++;
-+ l = sc->next_return;
-+ if (curoffs >= offset) {
-+ int this_inode = yaffs_get_obj_inode(l);
-+ int this_type = yaffs_get_obj_type(l);
-+
-+ yaffs_get_obj_name(l, name, YAFFS_MAX_NAME_LENGTH + 1);
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readdir: %s inode %d",
-+ name, yaffs_get_obj_inode(l));
-+
-+ yaffs_gross_unlock(dev);
-+
-+ if (!dir_emit(ctx, name, strlen(name),
-+ this_inode, this_type) < 0) {
-+ yaffs_gross_lock(dev);
-+ goto out;
-+ }
-+
-+ yaffs_gross_lock(dev);
-+
-+ offset++;
-+ ctx->pos++;
-+ }
-+ yaffs_search_advance(sc);
-+ }
-+
-+out:
-+ yaffs_search_end(sc);
-+ yaffs_dev_to_lc(dev)->readdir_process = NULL;
-+ yaffs_gross_unlock(dev);
-+
-+ return ret_val;
-+}
-+#else
-+static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev;
-+ struct yaffs_search_context *sc;
-+ struct inode *inode = f->f_dentry->d_inode;
-+ unsigned long offset, curoffs;
-+ struct yaffs_obj *l;
-+ int ret_val = 0;
-+
-+ char name[YAFFS_MAX_NAME_LENGTH + 1];
-+
-+ obj = yaffs_dentry_to_obj(f->f_dentry);
-+ dev = obj->my_dev;
-+
-+ yaffs_gross_lock(dev);
-+
-+ yaffs_dev_to_lc(dev)->readdir_process = current;
-+
-+ offset = f->f_pos;
-+
-+ sc = yaffs_new_search(obj);
-+ if (!sc) {
-+ ret_val = -ENOMEM;
-+ goto out;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readdir: starting at %d", (int)offset);
-+
-+ if (offset == 0) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readdir: entry . ino %d",
-+ (int)inode->i_ino);
-+ yaffs_gross_unlock(dev);
-+ if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR) < 0) {
-+ yaffs_gross_lock(dev);
-+ goto out;
-+ }
-+ yaffs_gross_lock(dev);
-+ offset++;
-+ f->f_pos++;
-+ }
-+ if (offset == 1) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readdir: entry .. ino %d",
-+ (int)f->f_dentry->d_parent->d_inode->i_ino);
-+ yaffs_gross_unlock(dev);
-+ if (filldir(dirent, "..", 2, offset,
-+ f->f_dentry->d_parent->d_inode->i_ino,
-+ DT_DIR) < 0) {
-+ yaffs_gross_lock(dev);
-+ goto out;
-+ }
-+ yaffs_gross_lock(dev);
-+ offset++;
-+ f->f_pos++;
-+ }
-+
-+ curoffs = 1;
-+
-+ /* If the directory has changed since the open or last call to
-+ readdir, rewind to after the 2 canned entries. */
-+ if (f->f_version != inode->i_version) {
-+ offset = 2;
-+ f->f_pos = offset;
-+ f->f_version = inode->i_version;
-+ }
-+
-+ while (sc->next_return) {
-+ curoffs++;
-+ l = sc->next_return;
-+ if (curoffs >= offset) {
-+ int this_inode = yaffs_get_obj_inode(l);
-+ int this_type = yaffs_get_obj_type(l);
-+
-+ yaffs_get_obj_name(l, name, YAFFS_MAX_NAME_LENGTH + 1);
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_readdir: %s inode %d",
-+ name, yaffs_get_obj_inode(l));
-+
-+ yaffs_gross_unlock(dev);
-+
-+ if (filldir(dirent,
-+ name,
-+ strlen(name),
-+ offset, this_inode, this_type) < 0) {
-+ yaffs_gross_lock(dev);
-+ goto out;
-+ }
-+
-+ yaffs_gross_lock(dev);
-+
-+ offset++;
-+ f->f_pos++;
-+ }
-+ yaffs_search_advance(sc);
-+ }
-+
-+out:
-+ yaffs_search_end(sc);
-+ yaffs_dev_to_lc(dev)->readdir_process = NULL;
-+ yaffs_gross_unlock(dev);
-+
-+ return ret_val;
-+}
-+#endif
-+
-+static const struct file_operations yaffs_dir_operations = {
-+ .read = generic_read_dir,
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 12, 0))
-+ .iterate = yaffs_readdir,
-+#else
-+ .readdir = yaffs_readdir,
-+#endif
-+ .fsync = yaffs_sync_object,
-+ .llseek = generic_file_llseek,
-+};
-+
-+static void yaffs_fill_inode_from_obj(struct inode *inode,
-+ struct yaffs_obj *obj)
-+{
-+ if (inode && obj) {
-+
-+ /* Check mode against the variant type and attempt to repair if broken. */
-+ u32 mode = obj->yst_mode;
-+ switch (obj->variant_type) {
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ if (!S_ISREG(mode)) {
-+ obj->yst_mode &= ~S_IFMT;
-+ obj->yst_mode |= S_IFREG;
-+ }
-+
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ if (!S_ISLNK(mode)) {
-+ obj->yst_mode &= ~S_IFMT;
-+ obj->yst_mode |= S_IFLNK;
-+ }
-+
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ if (!S_ISDIR(mode)) {
-+ obj->yst_mode &= ~S_IFMT;
-+ obj->yst_mode |= S_IFDIR;
-+ }
-+
-+ break;
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ default:
-+ /* TODO? */
-+ break;
-+ }
-+
-+ inode->i_flags |= S_NOATIME;
-+
-+ inode->i_ino = obj->obj_id;
-+ inode->i_mode = obj->yst_mode;
-+ i_uid_write(inode, obj->yst_uid);
-+ i_gid_write(inode, obj->yst_gid);
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
-+ inode->i_blksize = inode->i_sb->s_blocksize;
-+#endif
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+
-+ inode->i_rdev = old_decode_dev(obj->yst_rdev);
-+ inode->i_atime.tv_sec = (time_t) (obj->yst_atime);
-+ inode->i_atime.tv_nsec = 0;
-+ inode->i_mtime.tv_sec = (time_t) obj->yst_mtime;
-+ inode->i_mtime.tv_nsec = 0;
-+ inode->i_ctime.tv_sec = (time_t) obj->yst_ctime;
-+ inode->i_ctime.tv_nsec = 0;
-+#else
-+ inode->i_rdev = obj->yst_rdev;
-+ inode->i_atime = obj->yst_atime;
-+ inode->i_mtime = obj->yst_mtime;
-+ inode->i_ctime = obj->yst_ctime;
-+#endif
-+ inode->i_size = yaffs_get_obj_length(obj);
-+ inode->i_blocks = (inode->i_size + 511) >> 9;
-+
-+ set_nlink(inode, yaffs_get_obj_link_count(obj));
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_fill_inode mode %x uid %d gid %d size %lld count %d",
-+ inode->i_mode, i_uid_read(inode), i_gid_read(inode),
-+ inode->i_size, atomic_read(&inode->i_count));
-+
-+ switch (obj->yst_mode & S_IFMT) {
-+ default: /* fifo, device or socket */
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+ init_special_inode(inode, obj->yst_mode,
-+ old_decode_dev(obj->yst_rdev));
-+#else
-+ init_special_inode(inode, obj->yst_mode,
-+ (dev_t) (obj->yst_rdev));
-+#endif
-+ break;
-+ case S_IFREG: /* file */
-+ inode->i_op = &yaffs_file_inode_operations;
-+ inode->i_fop = &yaffs_file_operations;
-+ inode->i_mapping->a_ops =
-+ &yaffs_file_address_operations;
-+ break;
-+ case S_IFDIR: /* directory */
-+ inode->i_op = &yaffs_dir_inode_operations;
-+ inode->i_fop = &yaffs_dir_operations;
-+ break;
-+ case S_IFLNK: /* symlink */
-+ inode->i_op = &yaffs_symlink_inode_operations;
-+ break;
-+ }
-+
-+ yaffs_inode_to_obj_lv(inode) = obj;
-+
-+ obj->my_inode = inode;
-+
-+ } else {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_fill_inode invalid parameters");
-+ }
-+
-+}
-+
-+
-+
-+/*
-+ * yaffs background thread functions .
-+ * yaffs_bg_thread_fn() the thread function
-+ * yaffs_bg_start() launches the background thread.
-+ * yaffs_bg_stop() cleans up the background thread.
-+ *
-+ * NB:
-+ * The thread should only run after the yaffs is initialised
-+ * The thread should be stopped before yaffs is unmounted.
-+ * The thread should not do any writing while the fs is in read only.
-+ */
-+
-+static unsigned yaffs_bg_gc_urgency(struct yaffs_dev *dev)
-+{
-+ unsigned erased_chunks =
-+ dev->n_erased_blocks * dev->param.chunks_per_block;
-+ struct yaffs_linux_context *context = yaffs_dev_to_lc(dev);
-+ unsigned scattered = 0; /* Free chunks not in an erased block */
-+
-+ if (erased_chunks < dev->n_free_chunks)
-+ scattered = (dev->n_free_chunks - erased_chunks);
-+
-+ if (!context->bg_running)
-+ return 0;
-+ else if (scattered < (dev->param.chunks_per_block * 2))
-+ return 0;
-+ else if (erased_chunks > dev->n_free_chunks / 2)
-+ return 0;
-+ else if (erased_chunks > dev->n_free_chunks / 4)
-+ return 1;
-+ else
-+ return 2;
-+}
-+
-+#ifdef YAFFS_COMPILE_BACKGROUND
-+
-+void yaffs_background_waker(unsigned long data)
-+{
-+ wake_up_process((struct task_struct *)data);
-+}
-+
-+static int yaffs_bg_thread_fn(void *data)
-+{
-+ struct yaffs_dev *dev = (struct yaffs_dev *)data;
-+ struct yaffs_linux_context *context = yaffs_dev_to_lc(dev);
-+ unsigned long now = jiffies;
-+ unsigned long next_dir_update = now;
-+ unsigned long next_gc = now;
-+ unsigned long expires;
-+ unsigned int urgency;
-+
-+ int gc_result;
-+ struct timer_list timer;
-+
-+ yaffs_trace(YAFFS_TRACE_BACKGROUND,
-+ "yaffs_background starting for dev %p", (void *)dev);
-+
-+#ifdef YAFFS_COMPILE_FREEZER
-+ set_freezable();
-+#endif
-+ while (context->bg_running) {
-+ yaffs_trace(YAFFS_TRACE_BACKGROUND, "yaffs_background");
-+
-+ if (kthread_should_stop())
-+ break;
-+
-+#ifdef YAFFS_COMPILE_FREEZER
-+ if (try_to_freeze())
-+ continue;
-+#endif
-+ yaffs_gross_lock(dev);
-+
-+ now = jiffies;
-+
-+ if (time_after(now, next_dir_update) && yaffs_bg_enable) {
-+ yaffs_update_dirty_dirs(dev);
-+ next_dir_update = now + HZ;
-+ }
-+
-+ if (time_after(now, next_gc) && yaffs_bg_enable) {
-+ if (!dev->is_checkpointed) {
-+ urgency = yaffs_bg_gc_urgency(dev);
-+ gc_result = yaffs_bg_gc(dev, urgency);
-+ if (urgency > 1)
-+ next_gc = now + HZ / 20 + 1;
-+ else if (urgency > 0)
-+ next_gc = now + HZ / 10 + 1;
-+ else
-+ next_gc = now + HZ * 2;
-+ } else {
-+ /*
-+ * gc not running so set to next_dir_update
-+ * to cut down on wake ups
-+ */
-+ next_gc = next_dir_update;
-+ }
-+ }
-+ yaffs_gross_unlock(dev);
-+#if 1
-+ expires = next_dir_update;
-+ if (time_before(next_gc, expires))
-+ expires = next_gc;
-+ if (time_before(expires, now))
-+ expires = now + HZ;
-+
-+ Y_INIT_TIMER(&timer);
-+ timer.expires = expires + 1;
-+ timer.data = (unsigned long)current;
-+ timer.function = yaffs_background_waker;
-+
-+ set_current_state(TASK_INTERRUPTIBLE);
-+ add_timer(&timer);
-+ schedule();
-+ del_timer_sync(&timer);
-+#else
-+ msleep(10);
-+#endif
-+ }
-+
-+ return 0;
-+}
-+
-+static int yaffs_bg_start(struct yaffs_dev *dev)
-+{
-+ int retval = 0;
-+ struct yaffs_linux_context *context = yaffs_dev_to_lc(dev);
-+
-+ if (dev->read_only)
-+ return -1;
-+
-+ context->bg_running = 1;
-+
-+ context->bg_thread = kthread_run(yaffs_bg_thread_fn,
-+ (void *)dev, "yaffs-bg-%d",
-+ context->mount_id);
-+
-+ if (IS_ERR(context->bg_thread)) {
-+ retval = PTR_ERR(context->bg_thread);
-+ context->bg_thread = NULL;
-+ context->bg_running = 0;
-+ }
-+ return retval;
-+}
-+
-+static void yaffs_bg_stop(struct yaffs_dev *dev)
-+{
-+ struct yaffs_linux_context *ctxt = yaffs_dev_to_lc(dev);
-+
-+ ctxt->bg_running = 0;
-+
-+ if (ctxt->bg_thread) {
-+ kthread_stop(ctxt->bg_thread);
-+ ctxt->bg_thread = NULL;
-+ }
-+}
-+#else
-+static int yaffs_bg_thread_fn(void *data)
-+{
-+ return 0;
-+}
-+
-+static int yaffs_bg_start(struct yaffs_dev *dev)
-+{
-+ return 0;
-+}
-+
-+static void yaffs_bg_stop(struct yaffs_dev *dev)
-+{
-+}
-+#endif
-+
-+
-+static void yaffs_flush_inodes(struct super_block *sb)
-+{
-+ struct inode *iptr;
-+ struct yaffs_obj *obj;
-+
-+ list_for_each_entry(iptr, &sb->s_inodes, i_sb_list) {
-+ obj = yaffs_inode_to_obj(iptr);
-+ if (obj) {
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "flushing obj %d",
-+ obj->obj_id);
-+ yaffs_flush_file(obj, 1, 0);
-+ }
-+ }
-+}
-+
-+static void yaffs_flush_super(struct super_block *sb, int do_checkpoint)
-+{
-+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
-+ if (!dev)
-+ return;
-+
-+ yaffs_flush_inodes(sb);
-+ yaffs_update_dirty_dirs(dev);
-+ yaffs_flush_whole_cache(dev);
-+ if (do_checkpoint)
-+ yaffs_checkpoint_save(dev);
-+}
-+
-+static LIST_HEAD(yaffs_context_list);
-+struct mutex yaffs_context_lock;
-+
-+static void yaffs_put_super(struct super_block *sb)
-+{
-+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
-+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_ALWAYS,
-+ "yaffs_put_super");
-+
-+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND,
-+ "Shutting down yaffs background thread");
-+ yaffs_bg_stop(dev);
-+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND,
-+ "yaffs background thread shut down");
-+
-+ yaffs_gross_lock(dev);
-+
-+ yaffs_flush_super(sb, 1);
-+
-+ yaffs_deinitialise(dev);
-+
-+ yaffs_gross_unlock(dev);
-+
-+ mutex_lock(&yaffs_context_lock);
-+ list_del_init(&(yaffs_dev_to_lc(dev)->context_list));
-+ mutex_unlock(&yaffs_context_lock);
-+
-+ if (yaffs_dev_to_lc(dev)->spare_buffer) {
-+ kfree(yaffs_dev_to_lc(dev)->spare_buffer);
-+ yaffs_dev_to_lc(dev)->spare_buffer = NULL;
-+ }
-+
-+ kfree(dev);
-+
-+ yaffs_put_mtd_device(mtd);
-+
-+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_ALWAYS,
-+ "yaffs_put_super done");
-+}
-+
-+
-+static unsigned yaffs_gc_control_callback(struct yaffs_dev *dev)
-+{
-+ return yaffs_gc_control;
-+}
-+
-+
-+#ifdef YAFFS_COMPILE_EXPORTFS
-+
-+static struct inode *yaffs2_nfs_get_inode(struct super_block *sb, uint64_t ino,
-+ uint32_t generation)
-+{
-+ return Y_IGET(sb, ino);
-+}
-+
-+static struct dentry *yaffs2_fh_to_dentry(struct super_block *sb,
-+ struct fid *fid, int fh_len,
-+ int fh_type)
-+{
-+ return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
-+ yaffs2_nfs_get_inode);
-+}
-+
-+static struct dentry *yaffs2_fh_to_parent(struct super_block *sb,
-+ struct fid *fid, int fh_len,
-+ int fh_type)
-+{
-+ return generic_fh_to_parent(sb, fid, fh_len, fh_type,
-+ yaffs2_nfs_get_inode);
-+}
-+
-+struct dentry *yaffs2_get_parent(struct dentry *dentry)
-+{
-+
-+ struct super_block *sb = dentry->d_inode->i_sb;
-+ struct dentry *parent = ERR_PTR(-ENOENT);
-+ struct inode *inode;
-+ unsigned long parent_ino;
-+ struct yaffs_obj *d_obj;
-+ struct yaffs_obj *parent_obj;
-+
-+ d_obj = yaffs_inode_to_obj(dentry->d_inode);
-+
-+ if (d_obj) {
-+ parent_obj = d_obj->parent;
-+ if (parent_obj) {
-+ parent_ino = yaffs_get_obj_inode(parent_obj);
-+ inode = Y_IGET(sb, parent_ino);
-+
-+ if (IS_ERR(inode)) {
-+ parent = ERR_CAST(inode);
-+ } else {
-+ parent = d_obtain_alias(inode);
-+ if (!IS_ERR(parent)) {
-+ parent = ERR_PTR(-ENOMEM);
-+ iput(inode);
-+ }
-+ }
-+ }
-+ }
-+
-+ return parent;
-+}
-+
-+/* Just declare a zero structure as a NULL value implies
-+ * using the default functions of exportfs.
-+ */
-+
-+static struct export_operations yaffs_export_ops = {
-+ .fh_to_dentry = yaffs2_fh_to_dentry,
-+ .fh_to_parent = yaffs2_fh_to_parent,
-+ .get_parent = yaffs2_get_parent,
-+};
-+
-+#endif
-+
-+static void yaffs_unstitch_obj(struct inode *inode, struct yaffs_obj *obj)
-+{
-+ /* Clear the association between the inode and
-+ * the struct yaffs_obj.
-+ */
-+ obj->my_inode = NULL;
-+ yaffs_inode_to_obj_lv(inode) = NULL;
-+
-+ /* If the object freeing was deferred, then the real
-+ * free happens now.
-+ * This should fix the inode inconsistency problem.
-+ */
-+ yaffs_handle_defered_free(obj);
-+}
-+
-+#ifdef YAFFS_HAS_EVICT_INODE
-+/* yaffs_evict_inode combines into one operation what was previously done in
-+ * yaffs_clear_inode() and yaffs_delete_inode()
-+ *
-+ */
-+static void yaffs_evict_inode(struct inode *inode)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev;
-+ int deleteme = 0;
-+
-+ obj = yaffs_inode_to_obj(inode);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_evict_inode: ino %d, count %d %s",
-+ (int)inode->i_ino, atomic_read(&inode->i_count),
-+ obj ? "object exists" : "null object");
-+
-+ if (!inode->i_nlink && !is_bad_inode(inode))
-+ deleteme = 1;
-+ truncate_inode_pages(&inode->i_data, 0);
-+ Y_CLEAR_INODE(inode);
-+
-+ if (deleteme && obj) {
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+ yaffs_del_obj(obj);
-+ yaffs_gross_unlock(dev);
-+ }
-+ if (obj) {
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+ yaffs_unstitch_obj(inode, obj);
-+ yaffs_gross_unlock(dev);
-+ }
-+}
-+#else
-+
-+/* clear is called to tell the fs to release any per-inode data it holds.
-+ * The object might still exist on disk and is just being thrown out of the cache
-+ * or else the object has actually been deleted and we're being called via
-+ * the chain
-+ * yaffs_delete_inode() -> clear_inode()->yaffs_clear_inode()
-+ */
-+
-+static void yaffs_clear_inode(struct inode *inode)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_dev *dev;
-+
-+ obj = yaffs_inode_to_obj(inode);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_clear_inode: ino %d, count %d %s",
-+ (int)inode->i_ino, atomic_read(&inode->i_count),
-+ obj ? "object exists" : "null object");
-+
-+ if (obj) {
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+ yaffs_unstitch_obj(inode, obj);
-+ yaffs_gross_unlock(dev);
-+ }
-+
-+}
-+
-+/* delete is called when the link count is zero and the inode
-+ * is put (ie. nobody wants to know about it anymore, time to
-+ * delete the file).
-+ * NB Must call clear_inode()
-+ */
-+static void yaffs_delete_inode(struct inode *inode)
-+{
-+ struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
-+ struct yaffs_dev *dev;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_delete_inode: ino %d, count %d %s",
-+ (int)inode->i_ino, atomic_read(&inode->i_count),
-+ obj ? "object exists" : "null object");
-+
-+ if (obj) {
-+ dev = obj->my_dev;
-+ yaffs_gross_lock(dev);
-+ yaffs_del_obj(obj);
-+ yaffs_gross_unlock(dev);
-+ }
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
-+ truncate_inode_pages(&inode->i_data, 0);
-+#endif
-+ clear_inode(inode);
-+}
-+#endif
-+
-+
-+
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-+static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf)
-+{
-+ struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev;
-+ struct super_block *sb = dentry->d_sb;
-+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf)
-+{
-+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
-+#else
-+static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
-+{
-+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
-+#endif
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_statfs");
-+
-+ yaffs_gross_lock(dev);
-+
-+ buf->f_type = YAFFS_MAGIC;
-+ buf->f_bsize = sb->s_blocksize;
-+ buf->f_namelen = 255;
-+
-+ if (dev->data_bytes_per_chunk & (dev->data_bytes_per_chunk - 1)) {
-+ /* Do this if chunk size is not a power of 2 */
-+
-+ uint64_t bytes_in_dev;
-+ uint64_t bytes_free;
-+
-+ bytes_in_dev =
-+ ((uint64_t)
-+ ((dev->param.end_block - dev->param.start_block +
-+ 1))) * ((uint64_t) (dev->param.chunks_per_block *
-+ dev->data_bytes_per_chunk));
-+
-+ do_div(bytes_in_dev, sb->s_blocksize); /* bytes_in_dev becomes the number of blocks */
-+ buf->f_blocks = bytes_in_dev;
-+
-+ bytes_free = ((uint64_t) (yaffs_get_n_free_chunks(dev))) *
-+ ((uint64_t) (dev->data_bytes_per_chunk));
-+
-+ do_div(bytes_free, sb->s_blocksize);
-+
-+ buf->f_bfree = bytes_free;
-+
-+ } else if (sb->s_blocksize > dev->data_bytes_per_chunk) {
-+
-+ buf->f_blocks =
-+ (dev->param.end_block - dev->param.start_block + 1) *
-+ dev->param.chunks_per_block /
-+ (sb->s_blocksize / dev->data_bytes_per_chunk);
-+ buf->f_bfree =
-+ yaffs_get_n_free_chunks(dev) /
-+ (sb->s_blocksize / dev->data_bytes_per_chunk);
-+ } else {
-+ buf->f_blocks =
-+ (dev->param.end_block - dev->param.start_block + 1) *
-+ dev->param.chunks_per_block *
-+ (dev->data_bytes_per_chunk / sb->s_blocksize);
-+
-+ buf->f_bfree =
-+ yaffs_get_n_free_chunks(dev) *
-+ (dev->data_bytes_per_chunk / sb->s_blocksize);
-+ }
-+
-+ buf->f_files = 0;
-+ buf->f_ffree = 0;
-+ buf->f_bavail = buf->f_bfree;
-+
-+ yaffs_gross_unlock(dev);
-+ return 0;
-+}
-+
-+
-+
-+static int yaffs_do_sync_fs(struct super_block *sb, int request_checkpoint)
-+{
-+
-+ struct yaffs_dev *dev = yaffs_super_to_dev(sb);
-+ unsigned int oneshot_checkpoint = (yaffs_auto_checkpoint & 4);
-+ unsigned gc_urgent = yaffs_bg_gc_urgency(dev);
-+ int do_checkpoint;
-+ int dirty = yaffs_check_super_dirty(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND,
-+ "yaffs_do_sync_fs: gc-urgency %d %s %s%s",
-+ gc_urgent,
-+ dirty ? "dirty" : "clean",
-+ request_checkpoint ? "checkpoint requested" : "no checkpoint",
-+ oneshot_checkpoint ? " one-shot" : "");
-+
-+ yaffs_gross_lock(dev);
-+ do_checkpoint = ((request_checkpoint && !gc_urgent) ||
-+ oneshot_checkpoint) && !dev->is_checkpointed;
-+
-+ if (dirty || do_checkpoint) {
-+ yaffs_flush_super(sb, !dev->is_checkpointed && do_checkpoint);
-+ yaffs_clear_super_dirty(dev);
-+ if (oneshot_checkpoint)
-+ yaffs_auto_checkpoint &= ~4;
-+ }
-+ yaffs_gross_unlock(dev);
-+
-+ return 0;
-+}
-+
-+
-+#ifdef YAFFS_HAS_WRITE_SUPER
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-+static void yaffs_write_super(struct super_block *sb)
-+#else
-+static int yaffs_write_super(struct super_block *sb)
-+#endif
-+{
-+ unsigned request_checkpoint = (yaffs_auto_checkpoint >= 2);
-+
-+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND,
-+ "yaffs_write_super %s",
-+ request_checkpoint ? " checkpt" : "");
-+
-+ yaffs_do_sync_fs(sb, request_checkpoint);
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 18))
-+ return 0;
-+#endif
-+}
-+#endif
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-+static int yaffs_sync_fs(struct super_block *sb, int wait)
-+#else
-+static int yaffs_sync_fs(struct super_block *sb)
-+#endif
-+{
-+ unsigned request_checkpoint = (yaffs_auto_checkpoint >= 1);
-+
-+ yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC,
-+ "yaffs_sync_fs%s", request_checkpoint ? " checkpt" : "");
-+
-+ yaffs_do_sync_fs(sb, request_checkpoint);
-+
-+ return 0;
-+}
-+
-+
-+
-+static const struct super_operations yaffs_super_ops = {
-+ .statfs = yaffs_statfs,
-+
-+#ifndef YAFFS_USE_OWN_IGET
-+ .read_inode = yaffs_read_inode,
-+#endif
-+#ifdef YAFFS_HAS_PUT_INODE
-+ .put_inode = yaffs_put_inode,
-+#endif
-+ .put_super = yaffs_put_super,
-+#ifdef YAFFS_HAS_EVICT_INODE
-+ .evict_inode = yaffs_evict_inode,
-+#else
-+ .delete_inode = yaffs_delete_inode,
-+ .clear_inode = yaffs_clear_inode,
-+#endif
-+ .sync_fs = yaffs_sync_fs,
-+#ifdef YAFFS_HAS_WRITE_SUPER
-+ .write_super = yaffs_write_super,
-+#endif
-+};
-+
-+struct yaffs_options {
-+ int inband_tags;
-+ int skip_checkpoint_read;
-+ int skip_checkpoint_write;
-+ int no_cache;
-+ int tags_ecc_on;
-+ int tags_ecc_overridden;
-+ int lazy_loading_enabled;
-+ int lazy_loading_overridden;
-+ int empty_lost_and_found;
-+ int empty_lost_and_found_overridden;
-+ int disable_summary;
-+};
-+
-+#define MAX_OPT_LEN 30
-+static int yaffs_parse_options(struct yaffs_options *options,
-+ const char *options_str)
-+{
-+ char cur_opt[MAX_OPT_LEN + 1];
-+ int p;
-+ int error = 0;
-+
-+ /* Parse through the options which is a comma seperated list */
-+
-+ while (options_str && *options_str && !error) {
-+ memset(cur_opt, 0, MAX_OPT_LEN + 1);
-+ p = 0;
-+
-+ while (*options_str == ',')
-+ options_str++;
-+
-+ while (*options_str && *options_str != ',') {
-+ if (p < MAX_OPT_LEN) {
-+ cur_opt[p] = *options_str;
-+ p++;
-+ }
-+ options_str++;
-+ }
-+
-+ if (!strcmp(cur_opt, "inband-tags")) {
-+ options->inband_tags = 1;
-+ } else if (!strcmp(cur_opt, "tags-ecc-off")) {
-+ options->tags_ecc_on = 0;
-+ options->tags_ecc_overridden = 1;
-+ } else if (!strcmp(cur_opt, "tags-ecc-on")) {
-+ options->tags_ecc_on = 1;
-+ options->tags_ecc_overridden = 1;
-+ } else if (!strcmp(cur_opt, "lazy-loading-off")) {
-+ options->lazy_loading_enabled = 0;
-+ options->lazy_loading_overridden = 1;
-+ } else if (!strcmp(cur_opt, "lazy-loading-on")) {
-+ options->lazy_loading_enabled = 1;
-+ options->lazy_loading_overridden = 1;
-+ } else if (!strcmp(cur_opt, "disable-summary")) {
-+ options->disable_summary = 1;
-+ } else if (!strcmp(cur_opt, "empty-lost-and-found-off")) {
-+ options->empty_lost_and_found = 0;
-+ options->empty_lost_and_found_overridden = 1;
-+ } else if (!strcmp(cur_opt, "empty-lost-and-found-on")) {
-+ options->empty_lost_and_found = 1;
-+ options->empty_lost_and_found_overridden = 1;
-+ } else if (!strcmp(cur_opt, "no-cache")) {
-+ options->no_cache = 1;
-+ } else if (!strcmp(cur_opt, "no-checkpoint-read")) {
-+ options->skip_checkpoint_read = 1;
-+ } else if (!strcmp(cur_opt, "no-checkpoint-write")) {
-+ options->skip_checkpoint_write = 1;
-+ } else if (!strcmp(cur_opt, "no-checkpoint")) {
-+ options->skip_checkpoint_read = 1;
-+ options->skip_checkpoint_write = 1;
-+ } else {
-+ printk(KERN_INFO "yaffs: Bad mount option \"%s\"\n",
-+ cur_opt);
-+ error = 1;
-+ }
-+ }
-+
-+ return error;
-+}
-+
-+
-+static struct dentry *yaffs_make_root(struct inode *inode)
-+{
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 4, 0))
-+ struct dentry *root = d_alloc_root(inode);
-+
-+ if (!root)
-+ iput(inode);
-+
-+ return root;
-+#else
-+ return d_make_root(inode);
-+#endif
-+}
-+
-+
-+
-+
-+static struct super_block *yaffs_internal_read_super(int yaffs_version,
-+ struct super_block *sb,
-+ void *data, int silent)
-+{
-+ int n_blocks;
-+ struct inode *inode = NULL;
-+ struct dentry *root;
-+ struct yaffs_dev *dev = 0;
-+ char devname_buf[BDEVNAME_SIZE + 1];
-+ struct mtd_info *mtd;
-+ int err;
-+ char *data_str = (char *)data;
-+ struct yaffs_linux_context *context = NULL;
-+ struct yaffs_param *param;
-+
-+ int read_only = 0;
-+ int inband_tags = 0;
-+
-+ struct yaffs_options options;
-+
-+ unsigned mount_id;
-+ int found;
-+ struct yaffs_linux_context *context_iterator;
-+ struct list_head *l;
-+
-+ if (!sb) {
-+ printk(KERN_INFO "yaffs: sb is NULL\n");
-+ return NULL;
-+ }
-+
-+ sb->s_magic = YAFFS_MAGIC;
-+ sb->s_op = &yaffs_super_ops;
-+ sb->s_flags |= MS_NOATIME;
-+
-+ read_only = ((sb->s_flags & MS_RDONLY) != 0);
-+
-+#ifdef YAFFS_COMPILE_EXPORTFS
-+ sb->s_export_op = &yaffs_export_ops;
-+#endif
-+
-+ if (!sb->s_dev)
-+ printk(KERN_INFO "yaffs: sb->s_dev is NULL\n");
-+ else if (!yaffs_devname(sb, devname_buf))
-+ printk(KERN_INFO "yaffs: devname is NULL\n");
-+ else
-+ printk(KERN_INFO "yaffs: dev is %d name is \"%s\" %s\n",
-+ sb->s_dev,
-+ yaffs_devname(sb, devname_buf), read_only ? "ro" : "rw");
-+
-+ if (!data_str)
-+ data_str = "";
-+
-+ printk(KERN_INFO "yaffs: passed flags \"%s\"\n", data_str);
-+
-+ memset(&options, 0, sizeof(options));
-+
-+ if (yaffs_parse_options(&options, data_str)) {
-+ /* Option parsing failed */
-+ return NULL;
-+ }
-+
-+ sb->s_blocksize = PAGE_CACHE_SIZE;
-+ sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_read_super: Using yaffs%d", yaffs_version);
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_read_super: block size %d", (int)(sb->s_blocksize));
-+
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs: Attempting MTD mount of %u.%u,\"%s\"",
-+ MAJOR(sb->s_dev), MINOR(sb->s_dev),
-+ yaffs_devname(sb, devname_buf));
-+
-+ /* Get the device */
-+ mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
-+ if (IS_ERR(mtd)) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs: MTD device %u either not valid or unavailable",
-+ MINOR(sb->s_dev));
-+ return NULL;
-+ }
-+
-+ if (yaffs_auto_select && yaffs_version == 1 && WRITE_SIZE(mtd) >= 2048) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "auto selecting yaffs2");
-+ yaffs_version = 2;
-+ }
-+
-+ /* Added NCB 26/5/2006 for completeness */
-+ if (yaffs_version == 2 && !options.inband_tags
-+ && WRITE_SIZE(mtd) == 512) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "auto selecting yaffs1");
-+ yaffs_version = 1;
-+ }
-+
-+ if (mtd->oobavail < sizeof(struct yaffs_packed_tags2) ||
-+ options.inband_tags)
-+ inband_tags = 1;
-+
-+ if(yaffs_verify_mtd(mtd, yaffs_version, inband_tags) < 0)
-+ return NULL;
-+
-+ /* OK, so if we got here, we have an MTD that's NAND and looks
-+ * like it has the right capabilities
-+ * Set the struct yaffs_dev up for mtd
-+ */
-+
-+ if (!read_only && !(mtd->flags & MTD_WRITEABLE)) {
-+ read_only = 1;
-+ printk(KERN_INFO
-+ "yaffs: mtd is read only, setting superblock read only\n"
-+ );
-+ sb->s_flags |= MS_RDONLY;
-+ }
-+
-+ dev = kmalloc(sizeof(struct yaffs_dev), GFP_KERNEL);
-+ context = kmalloc(sizeof(struct yaffs_linux_context), GFP_KERNEL);
-+
-+ if (!dev || !context) {
-+ kfree(dev);
-+ kfree(context);
-+ dev = NULL;
-+ context = NULL;
-+
-+ /* Deep shit could not allocate device structure */
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs_read_super: Failed trying to allocate struct yaffs_dev."
-+ );
-+ return NULL;
-+ }
-+ memset(dev, 0, sizeof(struct yaffs_dev));
-+ param = &(dev->param);
-+
-+ memset(context, 0, sizeof(struct yaffs_linux_context));
-+ dev->os_context = context;
-+ INIT_LIST_HEAD(&(context->context_list));
-+ context->dev = dev;
-+ context->super = sb;
-+
-+ dev->read_only = read_only;
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+ sb->s_fs_info = dev;
-+#else
-+ sb->u.generic_sbp = dev;
-+#endif
-+
-+
-+ dev->driver_context = mtd;
-+ param->name = mtd->name;
-+
-+ /* Set up the memory size parameters.... */
-+
-+
-+ param->n_reserved_blocks = 5;
-+ param->n_caches = (options.no_cache) ? 0 : 10;
-+ param->inband_tags = inband_tags;
-+
-+ param->enable_xattr = 1;
-+ if (options.lazy_loading_overridden)
-+ param->disable_lazy_load = !options.lazy_loading_enabled;
-+
-+ param->defered_dir_update = 1;
-+
-+ if (options.tags_ecc_overridden)
-+ param->no_tags_ecc = !options.tags_ecc_on;
-+
-+ param->empty_lost_n_found = 1;
-+ param->refresh_period = 500;
-+ param->disable_summary = options.disable_summary;
-+
-+
-+#ifdef CONFIG_YAFFS_DISABLE_BAD_BLOCK_MARKING
-+ param->disable_bad_block_marking = 1;
-+#endif
-+ if (options.empty_lost_and_found_overridden)
-+ param->empty_lost_n_found = options.empty_lost_and_found;
-+
-+ /* ... and the functions. */
-+ if (yaffs_version == 2) {
-+ param->is_yaffs2 = 1;
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-+ param->total_bytes_per_chunk = mtd->writesize;
-+ param->chunks_per_block = mtd->erasesize / mtd->writesize;
-+#else
-+ param->total_bytes_per_chunk = mtd->oobblock;
-+ param->chunks_per_block = mtd->erasesize / mtd->oobblock;
-+#endif
-+ n_blocks = YCALCBLOCKS(mtd->size, mtd->erasesize);
-+
-+ param->start_block = 0;
-+ param->end_block = n_blocks - 1;
-+ } else {
-+ param->is_yaffs2 = 0;
-+ n_blocks = YCALCBLOCKS(mtd->size,
-+ YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK);
-+
-+ param->chunks_per_block = YAFFS_CHUNKS_PER_BLOCK;
-+ param->total_bytes_per_chunk = YAFFS_BYTES_PER_CHUNK;
-+ }
-+
-+ param->start_block = 0;
-+ param->end_block = n_blocks - 1;
-+
-+ yaffs_mtd_drv_install(dev);
-+
-+ param->sb_dirty_fn = yaffs_set_super_dirty;
-+ param->gc_control_fn = yaffs_gc_control_callback;
-+
-+ yaffs_dev_to_lc(dev)->super = sb;
-+
-+ param->use_nand_ecc = 1;
-+
-+ param->skip_checkpt_rd = options.skip_checkpoint_read;
-+ param->skip_checkpt_wr = options.skip_checkpoint_write;
-+
-+ mutex_lock(&yaffs_context_lock);
-+ /* Get a mount id */
-+ found = 0;
-+ for (mount_id = 0; !found; mount_id++) {
-+ found = 1;
-+ list_for_each(l, &yaffs_context_list) {
-+ context_iterator =
-+ list_entry(l, struct yaffs_linux_context,
-+ context_list);
-+ if (context_iterator->mount_id == mount_id)
-+ found = 0;
-+ }
-+ }
-+ context->mount_id = mount_id;
-+
-+ list_add_tail(&(yaffs_dev_to_lc(dev)->context_list),
-+ &yaffs_context_list);
-+ mutex_unlock(&yaffs_context_lock);
-+
-+ /* Directory search handling... */
-+ INIT_LIST_HEAD(&(yaffs_dev_to_lc(dev)->search_contexts));
-+ param->remove_obj_fn = yaffs_remove_obj_callback;
-+
-+ mutex_init(&(yaffs_dev_to_lc(dev)->gross_lock));
-+
-+ yaffs_gross_lock(dev);
-+
-+ err = yaffs_guts_initialise(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_OS,
-+ "yaffs_read_super: guts initialised %s",
-+ (err == YAFFS_OK) ? "OK" : "FAILED");
-+
-+ if (err == YAFFS_OK)
-+ yaffs_bg_start(dev);
-+
-+ if (!context->bg_thread)
-+ param->defered_dir_update = 0;
-+
-+ sb->s_maxbytes = yaffs_max_file_size(dev);
-+
-+ /* Release lock before yaffs_get_inode() */
-+ yaffs_gross_unlock(dev);
-+
-+ /* Create root inode */
-+ if (err == YAFFS_OK)
-+ inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0, yaffs_root(dev));
-+
-+ if (!inode)
-+ return NULL;
-+
-+ inode->i_op = &yaffs_dir_inode_operations;
-+ inode->i_fop = &yaffs_dir_operations;
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_read_super: got root inode");
-+
-+ root = yaffs_make_root(inode);
-+
-+ if (!root)
-+ return NULL;
-+
-+ sb->s_root = root;
-+ if(!dev->is_checkpointed)
-+ yaffs_set_super_dirty(dev);
-+
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs_read_super: is_checkpointed %d",
-+ dev->is_checkpointed);
-+
-+ yaffs_trace(YAFFS_TRACE_OS, "yaffs_read_super: done");
-+ return sb;
-+}
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+static int yaffs_internal_read_super_mtd(struct super_block *sb, void *data,
-+ int silent)
-+{
-+ return yaffs_internal_read_super(1, sb, data, silent) ? 0 : -EINVAL;
-+}
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
-+static struct dentry *yaffs_mount(struct file_system_type *fs_type, int flags,
-+ const char *dev_name, void *data)
-+{
-+ return mount_bdev(fs_type, flags, dev_name, data, yaffs_internal_read_super_mtd);
-+}
-+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-+static int yaffs_read_super(struct file_system_type *fs,
-+ int flags, const char *dev_name,
-+ void *data, struct vfsmount *mnt)
-+{
-+
-+ return get_sb_bdev(fs, flags, dev_name, data,
-+ yaffs_internal_read_super_mtd, mnt);
-+}
-+#else
-+static struct super_block *yaffs_read_super(struct file_system_type *fs,
-+ int flags, const char *dev_name,
-+ void *data)
-+{
-+
-+ return get_sb_bdev(fs, flags, dev_name, data,
-+ yaffs_internal_read_super_mtd);
-+}
-+#endif
-+
-+static struct file_system_type yaffs_fs_type = {
-+ .owner = THIS_MODULE,
-+ .name = "yaffs",
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
-+ .mount = yaffs_mount,
-+#else
-+ .get_sb = yaffs_read_super,
-+#endif
-+ .kill_sb = kill_block_super,
-+ .fs_flags = FS_REQUIRES_DEV,
-+};
-+#else
-+static struct super_block *yaffs_read_super(struct super_block *sb, void *data,
-+ int silent)
-+{
-+ return yaffs_internal_read_super(1, sb, data, silent);
-+}
-+
-+static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super,
-+ FS_REQUIRES_DEV);
-+#endif
-+
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+static int yaffs2_internal_read_super_mtd(struct super_block *sb, void *data,
-+ int silent)
-+{
-+ return yaffs_internal_read_super(2, sb, data, silent) ? 0 : -EINVAL;
-+}
-+
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
-+static struct dentry *yaffs2_mount(struct file_system_type *fs_type, int flags,
-+ const char *dev_name, void *data)
-+{
-+ return mount_bdev(fs_type, flags, dev_name, data, yaffs2_internal_read_super_mtd);
-+}
-+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-+static int yaffs2_read_super(struct file_system_type *fs,
-+ int flags, const char *dev_name, void *data,
-+ struct vfsmount *mnt)
-+{
-+ return get_sb_bdev(fs, flags, dev_name, data,
-+ yaffs2_internal_read_super_mtd, mnt);
-+}
-+#else
-+static struct super_block *yaffs2_read_super(struct file_system_type *fs,
-+ int flags, const char *dev_name,
-+ void *data)
-+{
-+
-+ return get_sb_bdev(fs, flags, dev_name, data,
-+ yaffs2_internal_read_super_mtd);
-+}
-+#endif
-+
-+static struct file_system_type yaffs2_fs_type = {
-+ .owner = THIS_MODULE,
-+ .name = "yaffs2",
-+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
-+ .mount = yaffs2_mount,
-+#else
-+ .get_sb = yaffs2_read_super,
-+#endif
-+ .kill_sb = kill_block_super,
-+ .fs_flags = FS_REQUIRES_DEV,
-+};
-+#else
-+static struct super_block *yaffs2_read_super(struct super_block *sb,
-+ void *data, int silent)
-+{
-+ return yaffs_internal_read_super(2, sb, data, silent);
-+}
-+
-+static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super,
-+ FS_REQUIRES_DEV);
-+#endif
-+
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 9, 0))
-+static struct proc_dir_entry *my_proc_entry;
-+
-+static char *yaffs_dump_dev_part0(char *buf, struct yaffs_dev *dev)
-+{
-+ struct yaffs_param *param = &dev->param;
-+ int bs[10];
-+
-+ yaffs_count_blocks_by_state(dev,bs);
-+
-+ buf += sprintf(buf, "start_block.......... %d\n", param->start_block);
-+ buf += sprintf(buf, "end_block............ %d\n", param->end_block);
-+ buf += sprintf(buf, "total_bytes_per_chunk %d\n",
-+ param->total_bytes_per_chunk);
-+ buf += sprintf(buf, "use_nand_ecc......... %d\n", param->use_nand_ecc);
-+ buf += sprintf(buf, "no_tags_ecc.......... %d\n", param->no_tags_ecc);
-+ buf += sprintf(buf, "is_yaffs2............ %d\n", param->is_yaffs2);
-+ buf += sprintf(buf, "inband_tags.......... %d\n", param->inband_tags);
-+ buf += sprintf(buf, "empty_lost_n_found... %d\n",
-+ param->empty_lost_n_found);
-+ buf += sprintf(buf, "disable_lazy_load.... %d\n",
-+ param->disable_lazy_load);
-+ buf += sprintf(buf, "disable_bad_block_mrk %d\n",
-+ param->disable_bad_block_marking);
-+ buf += sprintf(buf, "refresh_period....... %d\n",
-+ param->refresh_period);
-+ buf += sprintf(buf, "n_caches............. %d\n", param->n_caches);
-+ buf += sprintf(buf, "n_reserved_blocks.... %d\n",
-+ param->n_reserved_blocks);
-+ buf += sprintf(buf, "always_check_erased.. %d\n",
-+ param->always_check_erased);
-+ buf += sprintf(buf, "\n");
-+ buf += sprintf(buf, "block count by state\n");
-+ buf += sprintf(buf, "0:%d 1:%d 2:%d 3:%d 4:%d\n",
-+ bs[0], bs[1], bs[2], bs[3], bs[4]);
-+ buf += sprintf(buf, "5:%d 6:%d 7:%d 8:%d 9:%d\n",
-+ bs[5], bs[6], bs[7], bs[8], bs[9]);
-+
-+ return buf;
-+}
-+
-+static char *yaffs_dump_dev_part1(char *buf, struct yaffs_dev *dev)
-+{
-+ buf += sprintf(buf, "max file size....... %lld\n",
-+ (long long) yaffs_max_file_size(dev));
-+ buf += sprintf(buf, "data_bytes_per_chunk. %d\n",
-+ dev->data_bytes_per_chunk);
-+ buf += sprintf(buf, "chunk_grp_bits....... %d\n", dev->chunk_grp_bits);
-+ buf += sprintf(buf, "chunk_grp_size....... %d\n", dev->chunk_grp_size);
-+ buf += sprintf(buf, "n_erased_blocks...... %d\n", dev->n_erased_blocks);
-+ buf += sprintf(buf, "blocks_in_checkpt.... %d\n",
-+ dev->blocks_in_checkpt);
-+ buf += sprintf(buf, "\n");
-+ buf += sprintf(buf, "n_tnodes............. %d\n", dev->n_tnodes);
-+ buf += sprintf(buf, "n_obj................ %d\n", dev->n_obj);
-+ buf += sprintf(buf, "n_free_chunks........ %d\n", dev->n_free_chunks);
-+ buf += sprintf(buf, "\n");
-+ buf += sprintf(buf, "n_page_writes........ %u\n", dev->n_page_writes);
-+ buf += sprintf(buf, "n_page_reads......... %u\n", dev->n_page_reads);
-+ buf += sprintf(buf, "n_erasures........... %u\n", dev->n_erasures);
-+ buf += sprintf(buf, "n_gc_copies.......... %u\n", dev->n_gc_copies);
-+ buf += sprintf(buf, "all_gcs.............. %u\n", dev->all_gcs);
-+ buf += sprintf(buf, "passive_gc_count..... %u\n",
-+ dev->passive_gc_count);
-+ buf += sprintf(buf, "oldest_dirty_gc_count %u\n",
-+ dev->oldest_dirty_gc_count);
-+ buf += sprintf(buf, "n_gc_blocks.......... %u\n", dev->n_gc_blocks);
-+ buf += sprintf(buf, "bg_gcs............... %u\n", dev->bg_gcs);
-+ buf += sprintf(buf, "n_retried_writes..... %u\n",
-+ dev->n_retried_writes);
-+ buf += sprintf(buf, "n_retired_blocks..... %u\n",
-+ dev->n_retired_blocks);
-+ buf += sprintf(buf, "n_ecc_fixed.......... %u\n", dev->n_ecc_fixed);
-+ buf += sprintf(buf, "n_ecc_unfixed........ %u\n", dev->n_ecc_unfixed);
-+ buf += sprintf(buf, "n_tags_ecc_fixed..... %u\n",
-+ dev->n_tags_ecc_fixed);
-+ buf += sprintf(buf, "n_tags_ecc_unfixed... %u\n",
-+ dev->n_tags_ecc_unfixed);
-+ buf += sprintf(buf, "cache_hits........... %u\n", dev->cache_hits);
-+ buf += sprintf(buf, "n_deleted_files...... %u\n", dev->n_deleted_files);
-+ buf += sprintf(buf, "n_unlinked_files..... %u\n",
-+ dev->n_unlinked_files);
-+ buf += sprintf(buf, "refresh_count........ %u\n", dev->refresh_count);
-+ buf += sprintf(buf, "n_bg_deletions....... %u\n", dev->n_bg_deletions);
-+ buf += sprintf(buf, "tags_used............ %u\n", dev->tags_used);
-+ buf += sprintf(buf, "summary_used......... %u\n", dev->summary_used);
-+
-+ return buf;
-+}
-+
-+static int yaffs_proc_read(char *page,
-+ char **start,
-+ off_t offset, int count, int *eof, void *data)
-+{
-+ struct list_head *item;
-+ char *buf = page;
-+ int step = offset;
-+ int n = 0;
-+
-+ /* Get proc_file_read() to step 'offset' by one on each sucessive call.
-+ * We use 'offset' (*ppos) to indicate where we are in dev_list.
-+ * This also assumes the user has posted a read buffer large
-+ * enough to hold the complete output; but that's life in /proc.
-+ */
-+
-+ *(int *)start = 1;
-+
-+ /* Print header first */
-+ if (step == 0)
-+ buf +=
-+ sprintf(buf,
-+ "Multi-version YAFFS built:" __DATE__ " " __TIME__
-+ "\n");
-+ else if (step == 1)
-+ buf += sprintf(buf, "\n");
-+ else {
-+ step -= 2;
-+
-+ mutex_lock(&yaffs_context_lock);
-+
-+ /* Locate and print the Nth entry. Order N-squared but N is small. */
-+ list_for_each(item, &yaffs_context_list) {
-+ struct yaffs_linux_context *dc =
-+ list_entry(item, struct yaffs_linux_context,
-+ context_list);
-+ struct yaffs_dev *dev = dc->dev;
-+
-+ if (n < (step & ~1)) {
-+ n += 2;
-+ continue;
-+ }
-+ if ((step & 1) == 0) {
-+ buf +=
-+ sprintf(buf, "\nDevice %d \"%s\"\n", n,
-+ dev->param.name);
-+ buf = yaffs_dump_dev_part0(buf, dev);
-+ } else {
-+ buf = yaffs_dump_dev_part1(buf, dev);
-+ }
-+
-+ break;
-+ }
-+ mutex_unlock(&yaffs_context_lock);
-+ }
-+
-+ return buf - page < count ? buf - page : count;
-+}
-+
-+/**
-+ * Set the verbosity of the warnings and error messages.
-+ *
-+ * Note that the names can only be a..z or _ with the current code.
-+ */
-+
-+static struct {
-+ char *mask_name;
-+ unsigned mask_bitfield;
-+} mask_flags[] = {
-+ {"allocate", YAFFS_TRACE_ALLOCATE},
-+ {"always", YAFFS_TRACE_ALWAYS},
-+ {"background", YAFFS_TRACE_BACKGROUND},
-+ {"bad_blocks", YAFFS_TRACE_BAD_BLOCKS},
-+ {"buffers", YAFFS_TRACE_BUFFERS},
-+ {"bug", YAFFS_TRACE_BUG},
-+ {"checkpt", YAFFS_TRACE_CHECKPOINT},
-+ {"deletion", YAFFS_TRACE_DELETION},
-+ {"erase", YAFFS_TRACE_ERASE},
-+ {"error", YAFFS_TRACE_ERROR},
-+ {"gc_detail", YAFFS_TRACE_GC_DETAIL},
-+ {"gc", YAFFS_TRACE_GC},
-+ {"lock", YAFFS_TRACE_LOCK},
-+ {"mtd", YAFFS_TRACE_MTD},
-+ {"nandaccess", YAFFS_TRACE_NANDACCESS},
-+ {"os", YAFFS_TRACE_OS},
-+ {"scan_debug", YAFFS_TRACE_SCAN_DEBUG},
-+ {"scan", YAFFS_TRACE_SCAN},
-+ {"mount", YAFFS_TRACE_MOUNT},
-+ {"tracing", YAFFS_TRACE_TRACING},
-+ {"sync", YAFFS_TRACE_SYNC},
-+ {"write", YAFFS_TRACE_WRITE},
-+ {"verify", YAFFS_TRACE_VERIFY},
-+ {"verify_nand", YAFFS_TRACE_VERIFY_NAND},
-+ {"verify_full", YAFFS_TRACE_VERIFY_FULL},
-+ {"verify_all", YAFFS_TRACE_VERIFY_ALL},
-+ {"all", 0xffffffff},
-+ {"none", 0},
-+ {NULL, 0},
-+};
-+
-+#define MAX_MASK_NAME_LENGTH 40
-+static int yaffs_proc_write_trace_options(struct file *file, const char *buf,
-+ unsigned long count, void *data)
-+{
-+ unsigned rg = 0, mask_bitfield;
-+ char *end;
-+ char *mask_name;
-+ const char *x;
-+ char substring[MAX_MASK_NAME_LENGTH + 1];
-+ int i;
-+ int done = 0;
-+ int add, len = 0;
-+ int pos = 0;
-+
-+ rg = yaffs_trace_mask;
-+
-+ while (!done && (pos < count)) {
-+ done = 1;
-+ while ((pos < count) && isspace(buf[pos]))
-+ pos++;
-+
-+ switch (buf[pos]) {
-+ case '+':
-+ case '-':
-+ case '=':
-+ add = buf[pos];
-+ pos++;
-+ break;
-+
-+ default:
-+ add = ' ';
-+ break;
-+ }
-+ mask_name = NULL;
-+
-+ mask_bitfield = simple_strtoul(buf + pos, &end, 0);
-+
-+ if (end > buf + pos) {
-+ mask_name = "numeral";
-+ len = end - (buf + pos);
-+ pos += len;
-+ done = 0;
-+ } else {
-+ for (x = buf + pos, i = 0;
-+ (*x == '_' || (*x >= 'a' && *x <= 'z')) &&
-+ i < MAX_MASK_NAME_LENGTH; x++, i++, pos++)
-+ substring[i] = *x;
-+ substring[i] = '\0';
-+
-+ for (i = 0; mask_flags[i].mask_name != NULL; i++) {
-+ if (strcmp(substring, mask_flags[i].mask_name)
-+ == 0) {
-+ mask_name = mask_flags[i].mask_name;
-+ mask_bitfield =
-+ mask_flags[i].mask_bitfield;
-+ done = 0;
-+ break;
-+ }
-+ }
-+ }
-+
-+ if (mask_name != NULL) {
-+ done = 0;
-+ switch (add) {
-+ case '-':
-+ rg &= ~mask_bitfield;
-+ break;
-+ case '+':
-+ rg |= mask_bitfield;
-+ break;
-+ case '=':
-+ rg = mask_bitfield;
-+ break;
-+ default:
-+ rg |= mask_bitfield;
-+ break;
-+ }
-+ }
-+ }
-+
-+ yaffs_trace_mask = rg | YAFFS_TRACE_ALWAYS;
-+
-+ printk(KERN_DEBUG "new trace = 0x%08X\n", yaffs_trace_mask);
-+
-+ if (rg & YAFFS_TRACE_ALWAYS) {
-+ for (i = 0; mask_flags[i].mask_name != NULL; i++) {
-+ char flag;
-+ flag = ((rg & mask_flags[i].mask_bitfield) ==
-+ mask_flags[i].mask_bitfield) ? '+' : '-';
-+ printk(KERN_DEBUG "%c%s\n", flag,
-+ mask_flags[i].mask_name);
-+ }
-+ }
-+
-+ return count;
-+}
-+
-+/* Debug strings are of the form:
-+ * .bnnn print info on block n
-+ * .cobjn,chunkn print nand chunk id for objn:chunkn
-+ */
-+
-+static int yaffs_proc_debug_write(struct file *file, const char *buf,
-+ unsigned long count, void *data)
-+{
-+
-+ char str[100];
-+ char *p0;
-+ char *p1;
-+ long p1_val;
-+ long p0_val;
-+ char cmd;
-+ struct list_head *item;
-+
-+ memset(str, 0, sizeof(str));
-+ memcpy(str, buf, min(count, sizeof(str) -1));
-+
-+ cmd = str[1];
-+
-+ p0 = str + 2;
-+
-+ p1 = p0;
-+
-+ while (*p1 && *p1 != ',') {
-+ p1++;
-+ }
-+ *p1 = '\0';
-+ p1++;
-+
-+ p0_val = simple_strtol(p0, NULL, 0);
-+ p1_val = simple_strtol(p1, NULL, 0);
-+
-+
-+ mutex_lock(&yaffs_context_lock);
-+
-+ /* Locate and print the Nth entry. Order N-squared but N is small. */
-+ list_for_each(item, &yaffs_context_list) {
-+ struct yaffs_linux_context *dc =
-+ list_entry(item, struct yaffs_linux_context,
-+ context_list);
-+ struct yaffs_dev *dev = dc->dev;
-+
-+ if (cmd == 'b') {
-+ struct yaffs_block_info *bi;
-+
-+ bi = yaffs_get_block_info(dev,p0_val);
-+
-+ if(bi) {
-+ printk("Block %d: state %d, retire %d, use %d, seq %d\n",
-+ (int)p0_val, bi->block_state,
-+ bi->needs_retiring, bi->pages_in_use,
-+ bi->seq_number);
-+ }
-+ } else if (cmd == 'c') {
-+ struct yaffs_obj *obj;
-+ int nand_chunk;
-+
-+ obj = yaffs_find_by_number(dev, p0_val);
-+ if (!obj)
-+ printk("No obj %d\n", (int)p0_val);
-+ else {
-+ if(p1_val == 0)
-+ nand_chunk = obj->hdr_chunk;
-+ else
-+ nand_chunk =
-+ yaffs_find_chunk_in_file(obj,
-+ p1_val, NULL);
-+ printk("Nand chunk for %d:%d is %d\n",
-+ (int)p0_val, (int)p1_val, nand_chunk);
-+ }
-+ }
-+ }
-+
-+ mutex_unlock(&yaffs_context_lock);
-+
-+ return count;
-+}
-+
-+static int yaffs_proc_write(struct file *file, const char *buf,
-+ unsigned long count, void *data)
-+{
-+ if (buf[0] == '.')
-+ return yaffs_proc_debug_write(file, buf, count, data);
-+ return yaffs_proc_write_trace_options(file, buf, count, data);
-+}
-+#endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(3, 9, 0)) */
-+
-+/* Stuff to handle installation of file systems */
-+struct file_system_to_install {
-+ struct file_system_type *fst;
-+ int installed;
-+};
-+
-+static struct file_system_to_install fs_to_install[] = {
-+ {&yaffs_fs_type, 0},
-+ {&yaffs2_fs_type, 0},
-+ {NULL, 0}
-+};
-+
-+static int __init init_yaffs_fs(void)
-+{
-+ int error = 0;
-+ struct file_system_to_install *fsinst;
-+
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs built " __DATE__ " " __TIME__ " Installing.");
-+
-+ mutex_init(&yaffs_context_lock);
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 9, 0))
-+ /* Install the proc_fs entries */
-+ my_proc_entry = create_proc_entry("yaffs",
-+ S_IRUGO | S_IFREG, YPROC_ROOT);
-+
-+ if (my_proc_entry) {
-+ my_proc_entry->write_proc = yaffs_proc_write;
-+ my_proc_entry->read_proc = yaffs_proc_read;
-+ my_proc_entry->data = NULL;
-+ } else {
-+ return -ENOMEM;
-+ }
-+#endif
-+
-+ /* Now add the file system entries */
-+
-+ fsinst = fs_to_install;
-+
-+ while (fsinst->fst && !error) {
-+ error = register_filesystem(fsinst->fst);
-+ if (!error)
-+ fsinst->installed = 1;
-+ fsinst++;
-+ }
-+
-+ /* Any errors? uninstall */
-+ if (error) {
-+ fsinst = fs_to_install;
-+
-+ while (fsinst->fst) {
-+ if (fsinst->installed) {
-+ unregister_filesystem(fsinst->fst);
-+ fsinst->installed = 0;
-+ }
-+ fsinst++;
-+ }
-+ }
-+
-+ return error;
-+}
-+
-+static void __exit exit_yaffs_fs(void)
-+{
-+
-+ struct file_system_to_install *fsinst;
-+
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "yaffs built " __DATE__ " " __TIME__ " removing.");
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 9, 0))
-+ remove_proc_entry("yaffs", YPROC_ROOT);
-+#endif
-+
-+ fsinst = fs_to_install;
-+
-+ while (fsinst->fst) {
-+ if (fsinst->installed) {
-+ unregister_filesystem(fsinst->fst);
-+ fsinst->installed = 0;
-+ }
-+ fsinst++;
-+ }
-+}
-+
-+module_init(init_yaffs_fs)
-+ module_exit(exit_yaffs_fs)
-+
-+ MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system");
-+MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2011");
-+MODULE_LICENSE("GPL");
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_yaffs1.c linux-3.4.90/fs/yaffs2/yaffs_yaffs1.c
---- linux-3.4.90.orig/fs/yaffs2/yaffs_yaffs1.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_yaffs1.c 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,422 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_yaffs1.h"
-+#include "yportenv.h"
-+#include "yaffs_trace.h"
-+#include "yaffs_bitmap.h"
-+#include "yaffs_getblockinfo.h"
-+#include "yaffs_nand.h"
-+#include "yaffs_attribs.h"
-+
-+int yaffs1_scan(struct yaffs_dev *dev)
-+{
-+ struct yaffs_ext_tags tags;
-+ int blk;
-+ int result;
-+ int chunk;
-+ int c;
-+ int deleted;
-+ enum yaffs_block_state state;
-+ LIST_HEAD(hard_list);
-+ struct yaffs_block_info *bi;
-+ u32 seq_number;
-+ struct yaffs_obj_hdr *oh;
-+ struct yaffs_obj *in;
-+ struct yaffs_obj *parent;
-+ int alloc_failed = 0;
-+ struct yaffs_shadow_fixer *shadow_fixers = NULL;
-+ u8 *chunk_data;
-+
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ "yaffs1_scan starts intstartblk %d intendblk %d...",
-+ dev->internal_start_block, dev->internal_end_block);
-+
-+ chunk_data = yaffs_get_temp_buffer(dev);
-+
-+ dev->seq_number = YAFFS_LOWEST_SEQUENCE_NUMBER;
-+
-+ /* Scan all the blocks to determine their state */
-+ bi = dev->block_info;
-+ for (blk = dev->internal_start_block; blk <= dev->internal_end_block;
-+ blk++) {
-+ yaffs_clear_chunk_bits(dev, blk);
-+ bi->pages_in_use = 0;
-+ bi->soft_del_pages = 0;
-+
-+ yaffs_query_init_block_state(dev, blk, &state, &seq_number);
-+
-+ bi->block_state = state;
-+ bi->seq_number = seq_number;
-+
-+ if (bi->seq_number == YAFFS_SEQUENCE_BAD_BLOCK)
-+ bi->block_state = state = YAFFS_BLOCK_STATE_DEAD;
-+
-+ yaffs_trace(YAFFS_TRACE_SCAN_DEBUG,
-+ "Block scanning block %d state %d seq %d",
-+ blk, state, seq_number);
-+
-+ if (state == YAFFS_BLOCK_STATE_DEAD) {
-+ yaffs_trace(YAFFS_TRACE_BAD_BLOCKS,
-+ "block %d is bad", blk);
-+ } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
-+ yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, "Block empty ");
-+ dev->n_erased_blocks++;
-+ dev->n_free_chunks += dev->param.chunks_per_block;
-+ }
-+ bi++;
-+ }
-+
-+ /* For each block.... */
-+ for (blk = dev->internal_start_block;
-+ !alloc_failed && blk <= dev->internal_end_block; blk++) {
-+
-+ cond_resched();
-+
-+ bi = yaffs_get_block_info(dev, blk);
-+ state = bi->block_state;
-+
-+ deleted = 0;
-+
-+ /* For each chunk in each block that needs scanning.... */
-+ for (c = 0;
-+ !alloc_failed && c < dev->param.chunks_per_block &&
-+ state == YAFFS_BLOCK_STATE_NEEDS_SCAN; c++) {
-+ /* Read the tags and decide what to do */
-+ chunk = blk * dev->param.chunks_per_block + c;
-+
-+ result = yaffs_rd_chunk_tags_nand(dev, chunk, NULL,
-+ &tags);
-+
-+ /* Let's have a good look at this chunk... */
-+
-+ if (tags.ecc_result == YAFFS_ECC_RESULT_UNFIXED ||
-+ tags.is_deleted) {
-+ /* YAFFS1 only...
-+ * A deleted chunk
-+ */
-+ deleted++;
-+ dev->n_free_chunks++;
-+ } else if (!tags.chunk_used) {
-+ /* An unassigned chunk in the block
-+ * This means that either the block is empty or
-+ * this is the one being allocated from
-+ */
-+
-+ if (c == 0) {
-+ /* We're looking at the first chunk in
-+ *the block so the block is unused */
-+ state = YAFFS_BLOCK_STATE_EMPTY;
-+ dev->n_erased_blocks++;
-+ } else {
-+ /* this is the block being allocated */
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ " Allocating from %d %d",
-+ blk, c);
-+ state = YAFFS_BLOCK_STATE_ALLOCATING;
-+ dev->alloc_block = blk;
-+ dev->alloc_page = c;
-+ dev->alloc_block_finder = blk;
-+
-+ }
-+
-+ dev->n_free_chunks +=
-+ (dev->param.chunks_per_block - c);
-+ } else if (tags.chunk_id > 0) {
-+ /* chunk_id > 0 so it is a data chunk... */
-+ unsigned int endpos;
-+
-+ yaffs_set_chunk_bit(dev, blk, c);
-+ bi->pages_in_use++;
-+
-+ in = yaffs_find_or_create_by_number(dev,
-+ tags.obj_id,
-+ YAFFS_OBJECT_TYPE_FILE);
-+ /* PutChunkIntoFile checks for a clash
-+ * (two data chunks with the same chunk_id).
-+ */
-+
-+ if (!in)
-+ alloc_failed = 1;
-+
-+ if (in) {
-+ if (!yaffs_put_chunk_in_file
-+ (in, tags.chunk_id, chunk, 1))
-+ alloc_failed = 1;
-+ }
-+
-+ endpos =
-+ (tags.chunk_id - 1) *
-+ dev->data_bytes_per_chunk +
-+ tags.n_bytes;
-+ if (in &&
-+ in->variant_type ==
-+ YAFFS_OBJECT_TYPE_FILE &&
-+ in->variant.file_variant.scanned_size <
-+ endpos) {
-+ in->variant.file_variant.scanned_size =
-+ endpos;
-+ if (!dev->param.use_header_file_size) {
-+ in->variant.
-+ file_variant.file_size =
-+ in->variant.
-+ file_variant.scanned_size;
-+ }
-+
-+ }
-+ } else {
-+ /* chunk_id == 0, so it is an ObjectHeader.
-+ * Make the object
-+ */
-+ yaffs_set_chunk_bit(dev, blk, c);
-+ bi->pages_in_use++;
-+
-+ result = yaffs_rd_chunk_tags_nand(dev, chunk,
-+ chunk_data,
-+ NULL);
-+
-+ oh = (struct yaffs_obj_hdr *)chunk_data;
-+
-+ in = yaffs_find_by_number(dev, tags.obj_id);
-+ if (in && in->variant_type != oh->type) {
-+ /* This should not happen, but somehow
-+ * Wev'e ended up with an obj_id that
-+ * has been reused but not yet deleted,
-+ * and worse still it has changed type.
-+ * Delete the old object.
-+ */
-+
-+ yaffs_del_obj(in);
-+ in = NULL;
-+ }
-+
-+ in = yaffs_find_or_create_by_number(dev,
-+ tags.obj_id,
-+ oh->type);
-+
-+ if (!in)
-+ alloc_failed = 1;
-+
-+ if (in && oh->shadows_obj > 0) {
-+
-+ struct yaffs_shadow_fixer *fixer;
-+ fixer =
-+ kmalloc(sizeof
-+ (struct yaffs_shadow_fixer),
-+ GFP_NOFS);
-+ if (fixer) {
-+ fixer->next = shadow_fixers;
-+ shadow_fixers = fixer;
-+ fixer->obj_id = tags.obj_id;
-+ fixer->shadowed_id =
-+ oh->shadows_obj;
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ " Shadow fixer: %d shadows %d",
-+ fixer->obj_id,
-+ fixer->shadowed_id);
-+
-+ }
-+
-+ }
-+
-+ if (in && in->valid) {
-+ /* We have already filled this one.
-+ * We have a duplicate and need to
-+ * resolve it. */
-+
-+ unsigned existing_serial = in->serial;
-+ unsigned new_serial =
-+ tags.serial_number;
-+
-+ if (((existing_serial + 1) & 3) ==
-+ new_serial) {
-+ /* Use new one - destroy the
-+ * exisiting one */
-+ yaffs_chunk_del(dev,
-+ in->hdr_chunk,
-+ 1, __LINE__);
-+ in->valid = 0;
-+ } else {
-+ /* Use existing - destroy
-+ * this one. */
-+ yaffs_chunk_del(dev, chunk, 1,
-+ __LINE__);
-+ }
-+ }
-+
-+ if (in && !in->valid &&
-+ (tags.obj_id == YAFFS_OBJECTID_ROOT ||
-+ tags.obj_id ==
-+ YAFFS_OBJECTID_LOSTNFOUND)) {
-+ /* We only load some info, don't fiddle
-+ * with directory structure */
-+ in->valid = 1;
-+ in->variant_type = oh->type;
-+
-+ in->yst_mode = oh->yst_mode;
-+ yaffs_load_attribs(in, oh);
-+ in->hdr_chunk = chunk;
-+ in->serial = tags.serial_number;
-+
-+ } else if (in && !in->valid) {
-+ /* we need to load this info */
-+
-+ in->valid = 1;
-+ in->variant_type = oh->type;
-+
-+ in->yst_mode = oh->yst_mode;
-+ yaffs_load_attribs(in, oh);
-+ in->hdr_chunk = chunk;
-+ in->serial = tags.serial_number;
-+
-+ yaffs_set_obj_name_from_oh(in, oh);
-+ in->dirty = 0;
-+
-+ /* directory stuff...
-+ * hook up to parent
-+ */
-+
-+ parent =
-+ yaffs_find_or_create_by_number
-+ (dev, oh->parent_obj_id,
-+ YAFFS_OBJECT_TYPE_DIRECTORY);
-+ if (!parent)
-+ alloc_failed = 1;
-+ if (parent && parent->variant_type ==
-+ YAFFS_OBJECT_TYPE_UNKNOWN) {
-+ /* Set up as a directory */
-+ parent->variant_type =
-+ YAFFS_OBJECT_TYPE_DIRECTORY;
-+ INIT_LIST_HEAD(&parent->
-+ variant.dir_variant.
-+ children);
-+ } else if (!parent ||
-+ parent->variant_type !=
-+ YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ /* Hoosterman, a problem....
-+ * We're trying to use a
-+ * non-directory as a directory
-+ */
-+
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
-+ );
-+ parent = dev->lost_n_found;
-+ }
-+
-+ yaffs_add_obj_to_dir(parent, in);
-+
-+ switch (in->variant_type) {
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ /* Todo got a problem */
-+ break;
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ if (dev->param.
-+ use_header_file_size)
-+ in->variant.
-+ file_variant.file_size
-+ = yaffs_oh_to_size(oh);
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ in->variant.
-+ hardlink_variant.equiv_id =
-+ oh->equiv_id;
-+ list_add(&in->hard_links,
-+ &hard_list);
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ /* Do nothing */
-+ break;
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ /* Do nothing */
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ in->variant.symlink_variant.
-+ alias =
-+ yaffs_clone_str(oh->alias);
-+ if (!in->variant.
-+ symlink_variant.alias)
-+ alloc_failed = 1;
-+ break;
-+ }
-+ }
-+ }
-+ }
-+
-+ if (state == YAFFS_BLOCK_STATE_NEEDS_SCAN) {
-+ /* If we got this far while scanning,
-+ * then the block is fully allocated. */
-+ state = YAFFS_BLOCK_STATE_FULL;
-+ }
-+
-+ if (state == YAFFS_BLOCK_STATE_ALLOCATING) {
-+ /* If the block was partially allocated then
-+ * treat it as fully allocated. */
-+ state = YAFFS_BLOCK_STATE_FULL;
-+ dev->alloc_block = -1;
-+ }
-+
-+ bi->block_state = state;
-+
-+ /* Now let's see if it was dirty */
-+ if (bi->pages_in_use == 0 &&
-+ !bi->has_shrink_hdr &&
-+ bi->block_state == YAFFS_BLOCK_STATE_FULL)
-+ yaffs_block_became_dirty(dev, blk);
-+ }
-+
-+ /* Ok, we've done all the scanning.
-+ * Fix up the hard link chains.
-+ * We should now have scanned all the objects, now it's time to add
-+ * these hardlinks.
-+ */
-+
-+ yaffs_link_fixup(dev, &hard_list);
-+
-+ /*
-+ * Fix up any shadowed objects.
-+ * There should not be more than one of these.
-+ */
-+ {
-+ struct yaffs_shadow_fixer *fixer;
-+ struct yaffs_obj *obj;
-+
-+ while (shadow_fixers) {
-+ fixer = shadow_fixers;
-+ shadow_fixers = fixer->next;
-+ /* Complete the rename transaction by deleting the
-+ * shadowed object then setting the object header
-+ to unshadowed.
-+ */
-+ obj = yaffs_find_by_number(dev, fixer->shadowed_id);
-+ if (obj)
-+ yaffs_del_obj(obj);
-+
-+ obj = yaffs_find_by_number(dev, fixer->obj_id);
-+
-+ if (obj)
-+ yaffs_update_oh(obj, NULL, 1, 0, 0, NULL);
-+
-+ kfree(fixer);
-+ }
-+ }
-+
-+ yaffs_release_temp_buffer(dev, chunk_data);
-+
-+ if (alloc_failed)
-+ return YAFFS_FAIL;
-+
-+ yaffs_trace(YAFFS_TRACE_SCAN, "yaffs1_scan ends");
-+
-+ return YAFFS_OK;
-+}
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_yaffs1.h linux-3.4.90/fs/yaffs2/yaffs_yaffs1.h
---- linux-3.4.90.orig/fs/yaffs2/yaffs_yaffs1.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_yaffs1.h 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,22 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_YAFFS1_H__
-+#define __YAFFS_YAFFS1_H__
-+
-+#include "yaffs_guts.h"
-+int yaffs1_scan(struct yaffs_dev *dev);
-+
-+#endif
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_yaffs2.c linux-3.4.90/fs/yaffs2/yaffs_yaffs2.c
---- linux-3.4.90.orig/fs/yaffs2/yaffs_yaffs2.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_yaffs2.c 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,1534 @@
-+/*
-+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include "yaffs_guts.h"
-+#include "yaffs_trace.h"
-+#include "yaffs_yaffs2.h"
-+#include "yaffs_checkptrw.h"
-+#include "yaffs_bitmap.h"
-+#include "yaffs_nand.h"
-+#include "yaffs_getblockinfo.h"
-+#include "yaffs_verify.h"
-+#include "yaffs_attribs.h"
-+#include "yaffs_summary.h"
-+
-+/*
-+ * Checkpoints are really no benefit on very small partitions.
-+ *
-+ * To save space on small partitions don't bother with checkpoints unless
-+ * the partition is at least this big.
-+ */
-+#define YAFFS_CHECKPOINT_MIN_BLOCKS 60
-+#define YAFFS_SMALL_HOLE_THRESHOLD 4
-+
-+/*
-+ * Oldest Dirty Sequence Number handling.
-+ */
-+
-+/* yaffs_calc_oldest_dirty_seq()
-+ * yaffs2_find_oldest_dirty_seq()
-+ * Calculate the oldest dirty sequence number if we don't know it.
-+ */
-+void yaffs_calc_oldest_dirty_seq(struct yaffs_dev *dev)
-+{
-+ int i;
-+ unsigned seq;
-+ unsigned block_no = 0;
-+ struct yaffs_block_info *b;
-+
-+ if (!dev->param.is_yaffs2)
-+ return;
-+
-+ /* Find the oldest dirty sequence number. */
-+ seq = dev->seq_number + 1;
-+ b = dev->block_info;
-+ for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
-+ if (b->block_state == YAFFS_BLOCK_STATE_FULL &&
-+ (b->pages_in_use - b->soft_del_pages) <
-+ dev->param.chunks_per_block &&
-+ b->seq_number < seq) {
-+ seq = b->seq_number;
-+ block_no = i;
-+ }
-+ b++;
-+ }
-+
-+ if (block_no) {
-+ dev->oldest_dirty_seq = seq;
-+ dev->oldest_dirty_block = block_no;
-+ }
-+}
-+
-+void yaffs2_find_oldest_dirty_seq(struct yaffs_dev *dev)
-+{
-+ if (!dev->param.is_yaffs2)
-+ return;
-+
-+ if (!dev->oldest_dirty_seq)
-+ yaffs_calc_oldest_dirty_seq(dev);
-+}
-+
-+/*
-+ * yaffs_clear_oldest_dirty_seq()
-+ * Called when a block is erased or marked bad. (ie. when its seq_number
-+ * becomes invalid). If the value matches the oldest then we clear
-+ * dev->oldest_dirty_seq to force its recomputation.
-+ */
-+void yaffs2_clear_oldest_dirty_seq(struct yaffs_dev *dev,
-+ struct yaffs_block_info *bi)
-+{
-+
-+ if (!dev->param.is_yaffs2)
-+ return;
-+
-+ if (!bi || bi->seq_number == dev->oldest_dirty_seq) {
-+ dev->oldest_dirty_seq = 0;
-+ dev->oldest_dirty_block = 0;
-+ }
-+}
-+
-+/*
-+ * yaffs2_update_oldest_dirty_seq()
-+ * Update the oldest dirty sequence number whenever we dirty a block.
-+ * Only do this if the oldest_dirty_seq is actually being tracked.
-+ */
-+void yaffs2_update_oldest_dirty_seq(struct yaffs_dev *dev, unsigned block_no,
-+ struct yaffs_block_info *bi)
-+{
-+ if (!dev->param.is_yaffs2)
-+ return;
-+
-+ if (dev->oldest_dirty_seq) {
-+ if (dev->oldest_dirty_seq > bi->seq_number) {
-+ dev->oldest_dirty_seq = bi->seq_number;
-+ dev->oldest_dirty_block = block_no;
-+ }
-+ }
-+}
-+
-+int yaffs_block_ok_for_gc(struct yaffs_dev *dev, struct yaffs_block_info *bi)
-+{
-+
-+ if (!dev->param.is_yaffs2)
-+ return 1; /* disqualification only applies to yaffs2. */
-+
-+ if (!bi->has_shrink_hdr)
-+ return 1; /* can gc */
-+
-+ yaffs2_find_oldest_dirty_seq(dev);
-+
-+ /* Can't do gc of this block if there are any blocks older than this
-+ * one that have discarded pages.
-+ */
-+ return (bi->seq_number <= dev->oldest_dirty_seq);
-+}
-+
-+/*
-+ * yaffs2_find_refresh_block()
-+ * periodically finds the oldest full block by sequence number for refreshing.
-+ * Only for yaffs2.
-+ */
-+u32 yaffs2_find_refresh_block(struct yaffs_dev *dev)
-+{
-+ u32 b;
-+ u32 oldest = 0;
-+ u32 oldest_seq = 0;
-+ struct yaffs_block_info *bi;
-+
-+ if (!dev->param.is_yaffs2)
-+ return oldest;
-+
-+ /*
-+ * If refresh period < 10 then refreshing is disabled.
-+ */
-+ if (dev->param.refresh_period < 10)
-+ return oldest;
-+
-+ /*
-+ * Fix broken values.
-+ */
-+ if (dev->refresh_skip > dev->param.refresh_period)
-+ dev->refresh_skip = dev->param.refresh_period;
-+
-+ if (dev->refresh_skip > 0)
-+ return oldest;
-+
-+ /*
-+ * Refresh skip is now zero.
-+ * We'll do a refresh this time around....
-+ * Update the refresh skip and find the oldest block.
-+ */
-+ dev->refresh_skip = dev->param.refresh_period;
-+ dev->refresh_count++;
-+ bi = dev->block_info;
-+ for (b = dev->internal_start_block; b <= dev->internal_end_block; b++) {
-+
-+ if (bi->block_state == YAFFS_BLOCK_STATE_FULL) {
-+
-+ if (oldest < 1 || bi->seq_number < oldest_seq) {
-+ oldest = b;
-+ oldest_seq = bi->seq_number;
-+ }
-+ }
-+ bi++;
-+ }
-+
-+ if (oldest > 0) {
-+ yaffs_trace(YAFFS_TRACE_GC,
-+ "GC refresh count %d selected block %d with seq_number %d",
-+ dev->refresh_count, oldest, oldest_seq);
-+ }
-+
-+ return oldest;
-+}
-+
-+int yaffs2_checkpt_required(struct yaffs_dev *dev)
-+{
-+ int nblocks;
-+
-+ if (!dev->param.is_yaffs2)
-+ return 0;
-+
-+ nblocks = dev->internal_end_block - dev->internal_start_block + 1;
-+
-+ return !dev->param.skip_checkpt_wr &&
-+ !dev->read_only && (nblocks >= YAFFS_CHECKPOINT_MIN_BLOCKS);
-+}
-+
-+int yaffs_calc_checkpt_blocks_required(struct yaffs_dev *dev)
-+{
-+ int retval;
-+ int n_bytes = 0;
-+ int n_blocks;
-+ int dev_blocks;
-+
-+ if (!dev->param.is_yaffs2)
-+ return 0;
-+
-+ if (!dev->checkpoint_blocks_required && yaffs2_checkpt_required(dev)) {
-+ /* Not a valid value so recalculate */
-+ dev_blocks = dev->param.end_block - dev->param.start_block + 1;
-+ n_bytes += sizeof(struct yaffs_checkpt_validity);
-+ n_bytes += sizeof(struct yaffs_checkpt_dev);
-+ n_bytes += dev_blocks * sizeof(struct yaffs_block_info);
-+ n_bytes += dev_blocks * dev->chunk_bit_stride;
-+ n_bytes +=
-+ (sizeof(struct yaffs_checkpt_obj) + sizeof(u32)) *
-+ dev->n_obj;
-+ n_bytes += (dev->tnode_size + sizeof(u32)) * dev->n_tnodes;
-+ n_bytes += sizeof(struct yaffs_checkpt_validity);
-+ n_bytes += sizeof(u32); /* checksum */
-+
-+ /* Round up and add 2 blocks to allow for some bad blocks,
-+ * so add 3 */
-+
-+ n_blocks =
-+ (n_bytes /
-+ (dev->data_bytes_per_chunk *
-+ dev->param.chunks_per_block)) + 3;
-+
-+ dev->checkpoint_blocks_required = n_blocks;
-+ }
-+
-+ retval = dev->checkpoint_blocks_required - dev->blocks_in_checkpt;
-+ if (retval < 0)
-+ retval = 0;
-+ return retval;
-+}
-+
-+/*--------------------- Checkpointing --------------------*/
-+
-+static int yaffs2_wr_checkpt_validity_marker(struct yaffs_dev *dev, int head)
-+{
-+ struct yaffs_checkpt_validity cp;
-+
-+ memset(&cp, 0, sizeof(cp));
-+
-+ cp.struct_type = sizeof(cp);
-+ cp.magic = YAFFS_MAGIC;
-+ cp.version = YAFFS_CHECKPOINT_VERSION;
-+ cp.head = (head) ? 1 : 0;
-+
-+ return (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp)) ? 1 : 0;
-+}
-+
-+static int yaffs2_rd_checkpt_validity_marker(struct yaffs_dev *dev, int head)
-+{
-+ struct yaffs_checkpt_validity cp;
-+ int ok;
-+
-+ ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp));
-+
-+ if (ok)
-+ ok = (cp.struct_type == sizeof(cp)) &&
-+ (cp.magic == YAFFS_MAGIC) &&
-+ (cp.version == YAFFS_CHECKPOINT_VERSION) &&
-+ (cp.head == ((head) ? 1 : 0));
-+ return ok ? 1 : 0;
-+}
-+
-+static void yaffs2_dev_to_checkpt_dev(struct yaffs_checkpt_dev *cp,
-+ struct yaffs_dev *dev)
-+{
-+ cp->n_erased_blocks = dev->n_erased_blocks;
-+ cp->alloc_block = dev->alloc_block;
-+ cp->alloc_page = dev->alloc_page;
-+ cp->n_free_chunks = dev->n_free_chunks;
-+
-+ cp->n_deleted_files = dev->n_deleted_files;
-+ cp->n_unlinked_files = dev->n_unlinked_files;
-+ cp->n_bg_deletions = dev->n_bg_deletions;
-+ cp->seq_number = dev->seq_number;
-+
-+}
-+
-+static void yaffs_checkpt_dev_to_dev(struct yaffs_dev *dev,
-+ struct yaffs_checkpt_dev *cp)
-+{
-+ dev->n_erased_blocks = cp->n_erased_blocks;
-+ dev->alloc_block = cp->alloc_block;
-+ dev->alloc_page = cp->alloc_page;
-+ dev->n_free_chunks = cp->n_free_chunks;
-+
-+ dev->n_deleted_files = cp->n_deleted_files;
-+ dev->n_unlinked_files = cp->n_unlinked_files;
-+ dev->n_bg_deletions = cp->n_bg_deletions;
-+ dev->seq_number = cp->seq_number;
-+}
-+
-+static int yaffs2_wr_checkpt_dev(struct yaffs_dev *dev)
-+{
-+ struct yaffs_checkpt_dev cp;
-+ u32 n_bytes;
-+ u32 n_blocks = dev->internal_end_block - dev->internal_start_block + 1;
-+ int ok;
-+
-+ /* Write device runtime values */
-+ yaffs2_dev_to_checkpt_dev(&cp, dev);
-+ cp.struct_type = sizeof(cp);
-+
-+ ok = (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp));
-+ if (!ok)
-+ return 0;
-+
-+ /* Write block info */
-+ n_bytes = n_blocks * sizeof(struct yaffs_block_info);
-+ ok = (yaffs2_checkpt_wr(dev, dev->block_info, n_bytes) == n_bytes);
-+ if (!ok)
-+ return 0;
-+
-+ /* Write chunk bits */
-+ n_bytes = n_blocks * dev->chunk_bit_stride;
-+ ok = (yaffs2_checkpt_wr(dev, dev->chunk_bits, n_bytes) == n_bytes);
-+
-+ return ok ? 1 : 0;
-+}
-+
-+static int yaffs2_rd_checkpt_dev(struct yaffs_dev *dev)
-+{
-+ struct yaffs_checkpt_dev cp;
-+ u32 n_bytes;
-+ u32 n_blocks =
-+ (dev->internal_end_block - dev->internal_start_block + 1);
-+ int ok;
-+
-+ ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp));
-+ if (!ok)
-+ return 0;
-+
-+ if (cp.struct_type != sizeof(cp))
-+ return 0;
-+
-+ yaffs_checkpt_dev_to_dev(dev, &cp);
-+
-+ n_bytes = n_blocks * sizeof(struct yaffs_block_info);
-+
-+ ok = (yaffs2_checkpt_rd(dev, dev->block_info, n_bytes) == n_bytes);
-+
-+ if (!ok)
-+ return 0;
-+
-+ n_bytes = n_blocks * dev->chunk_bit_stride;
-+
-+ ok = (yaffs2_checkpt_rd(dev, dev->chunk_bits, n_bytes) == n_bytes);
-+
-+ return ok ? 1 : 0;
-+}
-+
-+static void yaffs2_obj_checkpt_obj(struct yaffs_checkpt_obj *cp,
-+ struct yaffs_obj *obj)
-+{
-+ cp->obj_id = obj->obj_id;
-+ cp->parent_id = (obj->parent) ? obj->parent->obj_id : 0;
-+ cp->hdr_chunk = obj->hdr_chunk;
-+ cp->variant_type = obj->variant_type;
-+ cp->deleted = obj->deleted;
-+ cp->soft_del = obj->soft_del;
-+ cp->unlinked = obj->unlinked;
-+ cp->fake = obj->fake;
-+ cp->rename_allowed = obj->rename_allowed;
-+ cp->unlink_allowed = obj->unlink_allowed;
-+ cp->serial = obj->serial;
-+ cp->n_data_chunks = obj->n_data_chunks;
-+
-+ if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE)
-+ cp->size_or_equiv_obj = obj->variant.file_variant.file_size;
-+ else if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK)
-+ cp->size_or_equiv_obj = obj->variant.hardlink_variant.equiv_id;
-+}
-+
-+static int yaffs2_checkpt_obj_to_obj(struct yaffs_obj *obj,
-+ struct yaffs_checkpt_obj *cp)
-+{
-+ struct yaffs_obj *parent;
-+
-+ if (obj->variant_type != cp->variant_type) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "Checkpoint read object %d type %d chunk %d does not match existing object type %d",
-+ cp->obj_id, cp->variant_type, cp->hdr_chunk,
-+ obj->variant_type);
-+ return 0;
-+ }
-+
-+ obj->obj_id = cp->obj_id;
-+
-+ if (cp->parent_id)
-+ parent = yaffs_find_or_create_by_number(obj->my_dev,
-+ cp->parent_id,
-+ YAFFS_OBJECT_TYPE_DIRECTORY);
-+ else
-+ parent = NULL;
-+
-+ if (parent) {
-+ if (parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ yaffs_trace(YAFFS_TRACE_ALWAYS,
-+ "Checkpoint read object %d parent %d type %d chunk %d Parent type, %d, not directory",
-+ cp->obj_id, cp->parent_id,
-+ cp->variant_type, cp->hdr_chunk,
-+ parent->variant_type);
-+ return 0;
-+ }
-+ yaffs_add_obj_to_dir(parent, obj);
-+ }
-+
-+ obj->hdr_chunk = cp->hdr_chunk;
-+ obj->variant_type = cp->variant_type;
-+ obj->deleted = cp->deleted;
-+ obj->soft_del = cp->soft_del;
-+ obj->unlinked = cp->unlinked;
-+ obj->fake = cp->fake;
-+ obj->rename_allowed = cp->rename_allowed;
-+ obj->unlink_allowed = cp->unlink_allowed;
-+ obj->serial = cp->serial;
-+ obj->n_data_chunks = cp->n_data_chunks;
-+
-+ if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE)
-+ obj->variant.file_variant.file_size = cp->size_or_equiv_obj;
-+ else if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK)
-+ obj->variant.hardlink_variant.equiv_id = cp->size_or_equiv_obj;
-+
-+ if (obj->hdr_chunk > 0)
-+ obj->lazy_loaded = 1;
-+ return 1;
-+}
-+
-+static int yaffs2_checkpt_tnode_worker(struct yaffs_obj *in,
-+ struct yaffs_tnode *tn, u32 level,
-+ int chunk_offset)
-+{
-+ int i;
-+ struct yaffs_dev *dev = in->my_dev;
-+ int ok = 1;
-+ u32 base_offset;
-+
-+ if (!tn)
-+ return 1;
-+
-+ if (level > 0) {
-+ for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
-+ if (!tn->internal[i])
-+ continue;
-+ ok = yaffs2_checkpt_tnode_worker(in,
-+ tn->internal[i],
-+ level - 1,
-+ (chunk_offset <<
-+ YAFFS_TNODES_INTERNAL_BITS) + i);
-+ }
-+ return ok;
-+ }
-+
-+ /* Level 0 tnode */
-+ base_offset = chunk_offset << YAFFS_TNODES_LEVEL0_BITS;
-+ ok = (yaffs2_checkpt_wr(dev, &base_offset, sizeof(base_offset)) ==
-+ sizeof(base_offset));
-+ if (ok)
-+ ok = (yaffs2_checkpt_wr(dev, tn, dev->tnode_size) ==
-+ dev->tnode_size);
-+
-+ return ok;
-+}
-+
-+static int yaffs2_wr_checkpt_tnodes(struct yaffs_obj *obj)
-+{
-+ u32 end_marker = ~0;
-+ int ok = 1;
-+
-+ if (obj->variant_type != YAFFS_OBJECT_TYPE_FILE)
-+ return ok;
-+
-+ ok = yaffs2_checkpt_tnode_worker(obj,
-+ obj->variant.file_variant.top,
-+ obj->variant.file_variant.
-+ top_level, 0);
-+ if (ok)
-+ ok = (yaffs2_checkpt_wr(obj->my_dev, &end_marker,
-+ sizeof(end_marker)) == sizeof(end_marker));
-+
-+ return ok ? 1 : 0;
-+}
-+
-+static int yaffs2_rd_checkpt_tnodes(struct yaffs_obj *obj)
-+{
-+ u32 base_chunk;
-+ int ok = 1;
-+ struct yaffs_dev *dev = obj->my_dev;
-+ struct yaffs_file_var *file_stuct_ptr = &obj->variant.file_variant;
-+ struct yaffs_tnode *tn;
-+ int nread = 0;
-+
-+ ok = (yaffs2_checkpt_rd(dev, &base_chunk, sizeof(base_chunk)) ==
-+ sizeof(base_chunk));
-+
-+ while (ok && (~base_chunk)) {
-+ nread++;
-+ /* Read level 0 tnode */
-+
-+ tn = yaffs_get_tnode(dev);
-+ if (tn)
-+ ok = (yaffs2_checkpt_rd(dev, tn, dev->tnode_size) ==
-+ dev->tnode_size);
-+ else
-+ ok = 0;
-+
-+ if (tn && ok)
-+ ok = yaffs_add_find_tnode_0(dev,
-+ file_stuct_ptr,
-+ base_chunk, tn) ? 1 : 0;
-+
-+ if (ok)
-+ ok = (yaffs2_checkpt_rd
-+ (dev, &base_chunk,
-+ sizeof(base_chunk)) == sizeof(base_chunk));
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "Checkpoint read tnodes %d records, last %d. ok %d",
-+ nread, base_chunk, ok);
-+
-+ return ok ? 1 : 0;
-+}
-+
-+static int yaffs2_wr_checkpt_objs(struct yaffs_dev *dev)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_checkpt_obj cp;
-+ int i;
-+ int ok = 1;
-+ struct list_head *lh;
-+
-+ /* Iterate through the objects in each hash entry,
-+ * dumping them to the checkpointing stream.
-+ */
-+
-+ for (i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++) {
-+ list_for_each(lh, &dev->obj_bucket[i].list) {
-+ obj = list_entry(lh, struct yaffs_obj, hash_link);
-+ if (!obj->defered_free) {
-+ yaffs2_obj_checkpt_obj(&cp, obj);
-+ cp.struct_type = sizeof(cp);
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "Checkpoint write object %d parent %d type %d chunk %d obj addr %p",
-+ cp.obj_id, cp.parent_id,
-+ cp.variant_type, cp.hdr_chunk, obj);
-+
-+ ok = (yaffs2_checkpt_wr(dev, &cp,
-+ sizeof(cp)) == sizeof(cp));
-+
-+ if (ok &&
-+ obj->variant_type ==
-+ YAFFS_OBJECT_TYPE_FILE)
-+ ok = yaffs2_wr_checkpt_tnodes(obj);
-+ }
-+ }
-+ }
-+
-+ /* Dump end of list */
-+ memset(&cp, 0xff, sizeof(struct yaffs_checkpt_obj));
-+ cp.struct_type = sizeof(cp);
-+
-+ if (ok)
-+ ok = (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp));
-+
-+ return ok ? 1 : 0;
-+}
-+
-+static int yaffs2_rd_checkpt_objs(struct yaffs_dev *dev)
-+{
-+ struct yaffs_obj *obj;
-+ struct yaffs_checkpt_obj cp;
-+ int ok = 1;
-+ int done = 0;
-+ LIST_HEAD(hard_list);
-+
-+
-+ while (ok && !done) {
-+ ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp));
-+ if (cp.struct_type != sizeof(cp)) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "struct size %d instead of %d ok %d",
-+ cp.struct_type, (int)sizeof(cp), ok);
-+ ok = 0;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "Checkpoint read object %d parent %d type %d chunk %d ",
-+ cp.obj_id, cp.parent_id, cp.variant_type,
-+ cp.hdr_chunk);
-+
-+ if (ok && cp.obj_id == ~0) {
-+ done = 1;
-+ } else if (ok) {
-+ obj =
-+ yaffs_find_or_create_by_number(dev, cp.obj_id,
-+ cp.variant_type);
-+ if (obj) {
-+ ok = yaffs2_checkpt_obj_to_obj(obj, &cp);
-+ if (!ok)
-+ break;
-+ if (obj->variant_type ==
-+ YAFFS_OBJECT_TYPE_FILE) {
-+ ok = yaffs2_rd_checkpt_tnodes(obj);
-+ } else if (obj->variant_type ==
-+ YAFFS_OBJECT_TYPE_HARDLINK) {
-+ list_add(&obj->hard_links, &hard_list);
-+ }
-+ } else {
-+ ok = 0;
-+ }
-+ }
-+ }
-+
-+ if (ok)
-+ yaffs_link_fixup(dev, &hard_list);
-+
-+ return ok ? 1 : 0;
-+}
-+
-+static int yaffs2_wr_checkpt_sum(struct yaffs_dev *dev)
-+{
-+ u32 checkpt_sum;
-+ int ok;
-+
-+ yaffs2_get_checkpt_sum(dev, &checkpt_sum);
-+
-+ ok = (yaffs2_checkpt_wr(dev, &checkpt_sum, sizeof(checkpt_sum)) ==
-+ sizeof(checkpt_sum));
-+
-+ if (!ok)
-+ return 0;
-+
-+ return 1;
-+}
-+
-+static int yaffs2_rd_checkpt_sum(struct yaffs_dev *dev)
-+{
-+ u32 checkpt_sum0;
-+ u32 checkpt_sum1;
-+ int ok;
-+
-+ yaffs2_get_checkpt_sum(dev, &checkpt_sum0);
-+
-+ ok = (yaffs2_checkpt_rd(dev, &checkpt_sum1, sizeof(checkpt_sum1)) ==
-+ sizeof(checkpt_sum1));
-+
-+ if (!ok)
-+ return 0;
-+
-+ if (checkpt_sum0 != checkpt_sum1)
-+ return 0;
-+
-+ return 1;
-+}
-+
-+static int yaffs2_wr_checkpt_data(struct yaffs_dev *dev)
-+{
-+ int ok = 1;
-+
-+ if (!yaffs2_checkpt_required(dev)) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "skipping checkpoint write");
-+ ok = 0;
-+ }
-+
-+ if (ok)
-+ ok = yaffs2_checkpt_open(dev, 1);
-+
-+ if (ok) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "write checkpoint validity");
-+ ok = yaffs2_wr_checkpt_validity_marker(dev, 1);
-+ }
-+ if (ok) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "write checkpoint device");
-+ ok = yaffs2_wr_checkpt_dev(dev);
-+ }
-+ if (ok) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "write checkpoint objects");
-+ ok = yaffs2_wr_checkpt_objs(dev);
-+ }
-+ if (ok) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "write checkpoint validity");
-+ ok = yaffs2_wr_checkpt_validity_marker(dev, 0);
-+ }
-+
-+ if (ok)
-+ ok = yaffs2_wr_checkpt_sum(dev);
-+
-+ if (!yaffs_checkpt_close(dev))
-+ ok = 0;
-+
-+ if (ok)
-+ dev->is_checkpointed = 1;
-+ else
-+ dev->is_checkpointed = 0;
-+
-+ return dev->is_checkpointed;
-+}
-+
-+static int yaffs2_rd_checkpt_data(struct yaffs_dev *dev)
-+{
-+ int ok = 1;
-+
-+ if (!dev->param.is_yaffs2)
-+ ok = 0;
-+
-+ if (ok && dev->param.skip_checkpt_rd) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "skipping checkpoint read");
-+ ok = 0;
-+ }
-+
-+ if (ok)
-+ ok = yaffs2_checkpt_open(dev, 0); /* open for read */
-+
-+ if (ok) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "read checkpoint validity");
-+ ok = yaffs2_rd_checkpt_validity_marker(dev, 1);
-+ }
-+ if (ok) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "read checkpoint device");
-+ ok = yaffs2_rd_checkpt_dev(dev);
-+ }
-+ if (ok) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "read checkpoint objects");
-+ ok = yaffs2_rd_checkpt_objs(dev);
-+ }
-+ if (ok) {
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "read checkpoint validity");
-+ ok = yaffs2_rd_checkpt_validity_marker(dev, 0);
-+ }
-+
-+ if (ok) {
-+ ok = yaffs2_rd_checkpt_sum(dev);
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "read checkpoint checksum %d", ok);
-+ }
-+
-+ if (!yaffs_checkpt_close(dev))
-+ ok = 0;
-+
-+ if (ok)
-+ dev->is_checkpointed = 1;
-+ else
-+ dev->is_checkpointed = 0;
-+
-+ return ok ? 1 : 0;
-+}
-+
-+void yaffs2_checkpt_invalidate(struct yaffs_dev *dev)
-+{
-+ if (dev->is_checkpointed || dev->blocks_in_checkpt > 0) {
-+ dev->is_checkpointed = 0;
-+ yaffs2_checkpt_invalidate_stream(dev);
-+ }
-+ if (dev->param.sb_dirty_fn)
-+ dev->param.sb_dirty_fn(dev);
-+}
-+
-+int yaffs_checkpoint_save(struct yaffs_dev *dev)
-+{
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "save entry: is_checkpointed %d",
-+ dev->is_checkpointed);
-+
-+ yaffs_verify_objects(dev);
-+ yaffs_verify_blocks(dev);
-+ yaffs_verify_free_chunks(dev);
-+
-+ if (!dev->is_checkpointed) {
-+ yaffs2_checkpt_invalidate(dev);
-+ yaffs2_wr_checkpt_data(dev);
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT | YAFFS_TRACE_MOUNT,
-+ "save exit: is_checkpointed %d",
-+ dev->is_checkpointed);
-+
-+ return dev->is_checkpointed;
-+}
-+
-+int yaffs2_checkpt_restore(struct yaffs_dev *dev)
-+{
-+ int retval;
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "restore entry: is_checkpointed %d",
-+ dev->is_checkpointed);
-+
-+ retval = yaffs2_rd_checkpt_data(dev);
-+
-+ if (dev->is_checkpointed) {
-+ yaffs_verify_objects(dev);
-+ yaffs_verify_blocks(dev);
-+ yaffs_verify_free_chunks(dev);
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
-+ "restore exit: is_checkpointed %d",
-+ dev->is_checkpointed);
-+
-+ return retval;
-+}
-+
-+int yaffs2_handle_hole(struct yaffs_obj *obj, loff_t new_size)
-+{
-+ /* if new_size > old_file_size.
-+ * We're going to be writing a hole.
-+ * If the hole is small then write zeros otherwise write a start
-+ * of hole marker.
-+ */
-+ loff_t old_file_size;
-+ loff_t increase;
-+ int small_hole;
-+ int result = YAFFS_OK;
-+ struct yaffs_dev *dev = NULL;
-+ u8 *local_buffer = NULL;
-+ int small_increase_ok = 0;
-+
-+ if (!obj)
-+ return YAFFS_FAIL;
-+
-+ if (obj->variant_type != YAFFS_OBJECT_TYPE_FILE)
-+ return YAFFS_FAIL;
-+
-+ dev = obj->my_dev;
-+
-+ /* Bail out if not yaffs2 mode */
-+ if (!dev->param.is_yaffs2)
-+ return YAFFS_OK;
-+
-+ old_file_size = obj->variant.file_variant.file_size;
-+
-+ if (new_size <= old_file_size)
-+ return YAFFS_OK;
-+
-+ increase = new_size - old_file_size;
-+
-+ if (increase < YAFFS_SMALL_HOLE_THRESHOLD * dev->data_bytes_per_chunk &&
-+ yaffs_check_alloc_available(dev, YAFFS_SMALL_HOLE_THRESHOLD + 1))
-+ small_hole = 1;
-+ else
-+ small_hole = 0;
-+
-+ if (small_hole)
-+ local_buffer = yaffs_get_temp_buffer(dev);
-+
-+ if (local_buffer) {
-+ /* fill hole with zero bytes */
-+ loff_t pos = old_file_size;
-+ int this_write;
-+ int written;
-+ memset(local_buffer, 0, dev->data_bytes_per_chunk);
-+ small_increase_ok = 1;
-+
-+ while (increase > 0 && small_increase_ok) {
-+ this_write = increase;
-+ if (this_write > dev->data_bytes_per_chunk)
-+ this_write = dev->data_bytes_per_chunk;
-+ written =
-+ yaffs_do_file_wr(obj, local_buffer, pos, this_write,
-+ 0);
-+ if (written == this_write) {
-+ pos += this_write;
-+ increase -= this_write;
-+ } else {
-+ small_increase_ok = 0;
-+ }
-+ }
-+
-+ yaffs_release_temp_buffer(dev, local_buffer);
-+
-+ /* If out of space then reverse any chunks we've added */
-+ if (!small_increase_ok)
-+ yaffs_resize_file_down(obj, old_file_size);
-+ }
-+
-+ if (!small_increase_ok &&
-+ obj->parent &&
-+ obj->parent->obj_id != YAFFS_OBJECTID_UNLINKED &&
-+ obj->parent->obj_id != YAFFS_OBJECTID_DELETED) {
-+ /* Write a hole start header with the old file size */
-+ yaffs_update_oh(obj, NULL, 0, 1, 0, NULL);
-+ }
-+
-+ return result;
-+}
-+
-+struct yaffs_block_index {
-+ int seq;
-+ int block;
-+};
-+
-+static int yaffs2_ybicmp(const void *a, const void *b)
-+{
-+ int aseq = ((struct yaffs_block_index *)a)->seq;
-+ int bseq = ((struct yaffs_block_index *)b)->seq;
-+ int ablock = ((struct yaffs_block_index *)a)->block;
-+ int bblock = ((struct yaffs_block_index *)b)->block;
-+
-+ if (aseq == bseq)
-+ return ablock - bblock;
-+
-+ return aseq - bseq;
-+}
-+
-+static inline int yaffs2_scan_chunk(struct yaffs_dev *dev,
-+ struct yaffs_block_info *bi,
-+ int blk, int chunk_in_block,
-+ int *found_chunks,
-+ u8 *chunk_data,
-+ struct list_head *hard_list,
-+ int summary_available)
-+{
-+ struct yaffs_obj_hdr *oh;
-+ struct yaffs_obj *in;
-+ struct yaffs_obj *parent;
-+ int equiv_id;
-+ loff_t file_size;
-+ int is_shrink;
-+ int is_unlinked;
-+ struct yaffs_ext_tags tags;
-+ int result;
-+ int alloc_failed = 0;
-+ int chunk = blk * dev->param.chunks_per_block + chunk_in_block;
-+ struct yaffs_file_var *file_var;
-+ struct yaffs_hardlink_var *hl_var;
-+ struct yaffs_symlink_var *sl_var;
-+
-+ if (summary_available) {
-+ result = yaffs_summary_fetch(dev, &tags, chunk_in_block);
-+ tags.seq_number = bi->seq_number;
-+ }
-+
-+ if (!summary_available || tags.obj_id == 0) {
-+ result = yaffs_rd_chunk_tags_nand(dev, chunk, NULL, &tags);
-+ dev->tags_used++;
-+ } else {
-+ dev->summary_used++;
-+ }
-+
-+ /* Let's have a good look at this chunk... */
-+
-+ if (!tags.chunk_used) {
-+ /* An unassigned chunk in the block.
-+ * If there are used chunks after this one, then
-+ * it is a chunk that was skipped due to failing
-+ * the erased check. Just skip it so that it can
-+ * be deleted.
-+ * But, more typically, We get here when this is
-+ * an unallocated chunk and his means that
-+ * either the block is empty or this is the one
-+ * being allocated from
-+ */
-+
-+ if (*found_chunks) {
-+ /* This is a chunk that was skipped due
-+ * to failing the erased check */
-+ } else if (chunk_in_block == 0) {
-+ /* We're looking at the first chunk in
-+ * the block so the block is unused */
-+ bi->block_state = YAFFS_BLOCK_STATE_EMPTY;
-+ dev->n_erased_blocks++;
-+ } else {
-+ if (bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCAN ||
-+ bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING) {
-+ if (dev->seq_number == bi->seq_number) {
-+ /* Allocating from this block*/
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ " Allocating from %d %d",
-+ blk, chunk_in_block);
-+
-+ bi->block_state =
-+ YAFFS_BLOCK_STATE_ALLOCATING;
-+ dev->alloc_block = blk;
-+ dev->alloc_page = chunk_in_block;
-+ dev->alloc_block_finder = blk;
-+ } else {
-+ /* This is a partially written block
-+ * that is not the current
-+ * allocation block.
-+ */
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ "Partially written block %d detected. gc will fix this.",
-+ blk);
-+ }
-+ }
-+ }
-+
-+ dev->n_free_chunks++;
-+
-+ } else if (tags.ecc_result ==
-+ YAFFS_ECC_RESULT_UNFIXED) {
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ " Unfixed ECC in chunk(%d:%d), chunk ignored",
-+ blk, chunk_in_block);
-+ dev->n_free_chunks++;
-+ } else if (tags.obj_id > YAFFS_MAX_OBJECT_ID ||
-+ tags.chunk_id > YAFFS_MAX_CHUNK_ID ||
-+ tags.obj_id == YAFFS_OBJECTID_SUMMARY ||
-+ (tags.chunk_id > 0 &&
-+ tags.n_bytes > dev->data_bytes_per_chunk) ||
-+ tags.seq_number != bi->seq_number) {
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ "Chunk (%d:%d) with bad tags:obj = %d, chunk_id = %d, n_bytes = %d, ignored",
-+ blk, chunk_in_block, tags.obj_id,
-+ tags.chunk_id, tags.n_bytes);
-+ dev->n_free_chunks++;
-+ } else if (tags.chunk_id > 0) {
-+ /* chunk_id > 0 so it is a data chunk... */
-+ loff_t endpos;
-+ loff_t chunk_base = (tags.chunk_id - 1) *
-+ dev->data_bytes_per_chunk;
-+
-+ *found_chunks = 1;
-+
-+ yaffs_set_chunk_bit(dev, blk, chunk_in_block);
-+ bi->pages_in_use++;
-+
-+ in = yaffs_find_or_create_by_number(dev,
-+ tags.obj_id,
-+ YAFFS_OBJECT_TYPE_FILE);
-+ if (!in)
-+ /* Out of memory */
-+ alloc_failed = 1;
-+
-+ if (in &&
-+ in->variant_type == YAFFS_OBJECT_TYPE_FILE &&
-+ chunk_base < in->variant.file_variant.shrink_size) {
-+ /* This has not been invalidated by
-+ * a resize */
-+ if (!yaffs_put_chunk_in_file(in, tags.chunk_id,
-+ chunk, -1))
-+ alloc_failed = 1;
-+
-+ /* File size is calculated by looking at
-+ * the data chunks if we have not
-+ * seen an object header yet.
-+ * Stop this practice once we find an
-+ * object header.
-+ */
-+ endpos = chunk_base + tags.n_bytes;
-+
-+ if (!in->valid &&
-+ in->variant.file_variant.scanned_size < endpos) {
-+ in->variant.file_variant.
-+ scanned_size = endpos;
-+ in->variant.file_variant.
-+ file_size = endpos;
-+ }
-+ } else if (in) {
-+ /* This chunk has been invalidated by a
-+ * resize, or a past file deletion
-+ * so delete the chunk*/
-+ yaffs_chunk_del(dev, chunk, 1, __LINE__);
-+ }
-+ } else {
-+ /* chunk_id == 0, so it is an ObjectHeader.
-+ * Thus, we read in the object header and make
-+ * the object
-+ */
-+ *found_chunks = 1;
-+
-+ yaffs_set_chunk_bit(dev, blk, chunk_in_block);
-+ bi->pages_in_use++;
-+
-+ oh = NULL;
-+ in = NULL;
-+
-+ if (tags.extra_available) {
-+ in = yaffs_find_or_create_by_number(dev,
-+ tags.obj_id,
-+ tags.extra_obj_type);
-+ if (!in)
-+ alloc_failed = 1;
-+ }
-+
-+ if (!in ||
-+ (!in->valid && dev->param.disable_lazy_load) ||
-+ tags.extra_shadows ||
-+ (!in->valid && (tags.obj_id == YAFFS_OBJECTID_ROOT ||
-+ tags.obj_id == YAFFS_OBJECTID_LOSTNFOUND))) {
-+
-+ /* If we don't have valid info then we
-+ * need to read the chunk
-+ * TODO In future we can probably defer
-+ * reading the chunk and living with
-+ * invalid data until needed.
-+ */
-+
-+ result = yaffs_rd_chunk_tags_nand(dev,
-+ chunk,
-+ chunk_data,
-+ NULL);
-+
-+ oh = (struct yaffs_obj_hdr *)chunk_data;
-+
-+ if (dev->param.inband_tags) {
-+ /* Fix up the header if they got
-+ * corrupted by inband tags */
-+ oh->shadows_obj =
-+ oh->inband_shadowed_obj_id;
-+ oh->is_shrink =
-+ oh->inband_is_shrink;
-+ }
-+
-+ if (!in) {
-+ in = yaffs_find_or_create_by_number(dev,
-+ tags.obj_id, oh->type);
-+ if (!in)
-+ alloc_failed = 1;
-+ }
-+ }
-+
-+ if (!in) {
-+ /* TODO Hoosterman we have a problem! */
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs tragedy: Could not make object for object %d at chunk %d during scan",
-+ tags.obj_id, chunk);
-+ return YAFFS_FAIL;
-+ }
-+
-+ if (in->valid) {
-+ /* We have already filled this one.
-+ * We have a duplicate that will be
-+ * discarded, but we first have to suck
-+ * out resize info if it is a file.
-+ */
-+ if ((in->variant_type == YAFFS_OBJECT_TYPE_FILE) &&
-+ ((oh && oh->type == YAFFS_OBJECT_TYPE_FILE) ||
-+ (tags.extra_available &&
-+ tags.extra_obj_type == YAFFS_OBJECT_TYPE_FILE)
-+ )) {
-+ loff_t this_size = (oh) ?
-+ yaffs_oh_to_size(oh) :
-+ tags.extra_file_size;
-+ u32 parent_obj_id = (oh) ?
-+ oh->parent_obj_id :
-+ tags.extra_parent_id;
-+
-+ is_shrink = (oh) ?
-+ oh->is_shrink :
-+ tags.extra_is_shrink;
-+
-+ /* If it is deleted (unlinked
-+ * at start also means deleted)
-+ * we treat the file size as
-+ * being zeroed at this point.
-+ */
-+ if (parent_obj_id == YAFFS_OBJECTID_DELETED ||
-+ parent_obj_id == YAFFS_OBJECTID_UNLINKED) {
-+ this_size = 0;
-+ is_shrink = 1;
-+ }
-+
-+ if (is_shrink &&
-+ in->variant.file_variant.shrink_size >
-+ this_size)
-+ in->variant.file_variant.shrink_size =
-+ this_size;
-+
-+ if (is_shrink)
-+ bi->has_shrink_hdr = 1;
-+ }
-+ /* Use existing - destroy this one. */
-+ yaffs_chunk_del(dev, chunk, 1, __LINE__);
-+ }
-+
-+ if (!in->valid && in->variant_type !=
-+ (oh ? oh->type : tags.extra_obj_type)) {
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs tragedy: Bad type, %d != %d, for object %d at chunk %d during scan",
-+ oh ? oh->type : tags.extra_obj_type,
-+ in->variant_type, tags.obj_id,
-+ chunk);
-+ in = yaffs_retype_obj(in, oh ? oh->type : tags.extra_obj_type);
-+ }
-+
-+ if (!in->valid &&
-+ (tags.obj_id == YAFFS_OBJECTID_ROOT ||
-+ tags.obj_id == YAFFS_OBJECTID_LOSTNFOUND)) {
-+ /* We only load some info, don't fiddle
-+ * with directory structure */
-+ in->valid = 1;
-+
-+ if (oh) {
-+ in->yst_mode = oh->yst_mode;
-+ yaffs_load_attribs(in, oh);
-+ in->lazy_loaded = 0;
-+ } else {
-+ in->lazy_loaded = 1;
-+ }
-+ in->hdr_chunk = chunk;
-+
-+ } else if (!in->valid) {
-+ /* we need to load this info */
-+ in->valid = 1;
-+ in->hdr_chunk = chunk;
-+ if (oh) {
-+ in->variant_type = oh->type;
-+ in->yst_mode = oh->yst_mode;
-+ yaffs_load_attribs(in, oh);
-+
-+ if (oh->shadows_obj > 0)
-+ yaffs_handle_shadowed_obj(dev,
-+ oh->shadows_obj, 1);
-+
-+ yaffs_set_obj_name_from_oh(in, oh);
-+ parent = yaffs_find_or_create_by_number(dev,
-+ oh->parent_obj_id,
-+ YAFFS_OBJECT_TYPE_DIRECTORY);
-+ file_size = yaffs_oh_to_size(oh);
-+ is_shrink = oh->is_shrink;
-+ equiv_id = oh->equiv_id;
-+ } else {
-+ in->variant_type = tags.extra_obj_type;
-+ parent = yaffs_find_or_create_by_number(dev,
-+ tags.extra_parent_id,
-+ YAFFS_OBJECT_TYPE_DIRECTORY);
-+ file_size = tags.extra_file_size;
-+ is_shrink = tags.extra_is_shrink;
-+ equiv_id = tags.extra_equiv_id;
-+ in->lazy_loaded = 1;
-+ }
-+ in->dirty = 0;
-+
-+ if (!parent)
-+ alloc_failed = 1;
-+
-+ /* directory stuff...
-+ * hook up to parent
-+ */
-+
-+ if (parent &&
-+ parent->variant_type == YAFFS_OBJECT_TYPE_UNKNOWN) {
-+ /* Set up as a directory */
-+ parent->variant_type =
-+ YAFFS_OBJECT_TYPE_DIRECTORY;
-+ INIT_LIST_HEAD(&parent->
-+ variant.dir_variant.children);
-+ } else if (!parent ||
-+ parent->variant_type !=
-+ YAFFS_OBJECT_TYPE_DIRECTORY) {
-+ /* Hoosterman, another problem....
-+ * Trying to use a non-directory as a directory
-+ */
-+
-+ yaffs_trace(YAFFS_TRACE_ERROR,
-+ "yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
-+ );
-+ parent = dev->lost_n_found;
-+ }
-+ yaffs_add_obj_to_dir(parent, in);
-+
-+ is_unlinked = (parent == dev->del_dir) ||
-+ (parent == dev->unlinked_dir);
-+
-+ if (is_shrink)
-+ /* Mark the block */
-+ bi->has_shrink_hdr = 1;
-+
-+ /* Note re hardlinks.
-+ * Since we might scan a hardlink before its equivalent
-+ * object is scanned we put them all in a list.
-+ * After scanning is complete, we should have all the
-+ * objects, so we run through this list and fix up all
-+ * the chains.
-+ */
-+
-+ switch (in->variant_type) {
-+ case YAFFS_OBJECT_TYPE_UNKNOWN:
-+ /* Todo got a problem */
-+ break;
-+ case YAFFS_OBJECT_TYPE_FILE:
-+ file_var = &in->variant.file_variant;
-+ if (file_var->scanned_size < file_size) {
-+ /* This covers the case where the file
-+ * size is greater than the data held.
-+ * This will happen if the file is
-+ * resized to be larger than its
-+ * current data extents.
-+ */
-+ file_var->file_size = file_size;
-+ file_var->scanned_size = file_size;
-+ }
-+
-+ if (file_var->shrink_size > file_size)
-+ file_var->shrink_size = file_size;
-+
-+ break;
-+ case YAFFS_OBJECT_TYPE_HARDLINK:
-+ hl_var = &in->variant.hardlink_variant;
-+ if (!is_unlinked) {
-+ hl_var->equiv_id = equiv_id;
-+ list_add(&in->hard_links, hard_list);
-+ }
-+ break;
-+ case YAFFS_OBJECT_TYPE_DIRECTORY:
-+ /* Do nothing */
-+ break;
-+ case YAFFS_OBJECT_TYPE_SPECIAL:
-+ /* Do nothing */
-+ break;
-+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ sl_var = &in->variant.symlink_variant;
-+ if (oh) {
-+ sl_var->alias =
-+ yaffs_clone_str(oh->alias);
-+ if (!sl_var->alias)
-+ alloc_failed = 1;
-+ }
-+ break;
-+ }
-+ }
-+ }
-+ return alloc_failed ? YAFFS_FAIL : YAFFS_OK;
-+}
-+
-+int yaffs2_scan_backwards(struct yaffs_dev *dev)
-+{
-+ int blk;
-+ int block_iter;
-+ int start_iter;
-+ int end_iter;
-+ int n_to_scan = 0;
-+ enum yaffs_block_state state;
-+ int c;
-+ int deleted;
-+ LIST_HEAD(hard_list);
-+ struct yaffs_block_info *bi;
-+ u32 seq_number;
-+ int n_blocks = dev->internal_end_block - dev->internal_start_block + 1;
-+ u8 *chunk_data;
-+ int found_chunks;
-+ int alloc_failed = 0;
-+ struct yaffs_block_index *block_index = NULL;
-+ int alt_block_index = 0;
-+ int summary_available;
-+
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ "yaffs2_scan_backwards starts intstartblk %d intendblk %d...",
-+ dev->internal_start_block, dev->internal_end_block);
-+
-+ dev->seq_number = YAFFS_LOWEST_SEQUENCE_NUMBER;
-+
-+ block_index =
-+ kmalloc(n_blocks * sizeof(struct yaffs_block_index), GFP_NOFS);
-+
-+ if (!block_index) {
-+ block_index =
-+ vmalloc(n_blocks * sizeof(struct yaffs_block_index));
-+ alt_block_index = 1;
-+ }
-+
-+ if (!block_index) {
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ "yaffs2_scan_backwards() could not allocate block index!"
-+ );
-+ return YAFFS_FAIL;
-+ }
-+
-+ dev->blocks_in_checkpt = 0;
-+
-+ chunk_data = yaffs_get_temp_buffer(dev);
-+
-+ /* Scan all the blocks to determine their state */
-+ bi = dev->block_info;
-+ for (blk = dev->internal_start_block; blk <= dev->internal_end_block;
-+ blk++) {
-+ yaffs_clear_chunk_bits(dev, blk);
-+ bi->pages_in_use = 0;
-+ bi->soft_del_pages = 0;
-+
-+ yaffs_query_init_block_state(dev, blk, &state, &seq_number);
-+
-+ bi->block_state = state;
-+ bi->seq_number = seq_number;
-+
-+ if (bi->seq_number == YAFFS_SEQUENCE_CHECKPOINT_DATA)
-+ bi->block_state = YAFFS_BLOCK_STATE_CHECKPOINT;
-+ if (bi->seq_number == YAFFS_SEQUENCE_BAD_BLOCK)
-+ bi->block_state = YAFFS_BLOCK_STATE_DEAD;
-+
-+ yaffs_trace(YAFFS_TRACE_SCAN_DEBUG,
-+ "Block scanning block %d state %d seq %d",
-+ blk, bi->block_state, seq_number);
-+
-+ if (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT) {
-+ dev->blocks_in_checkpt++;
-+
-+ } else if (bi->block_state == YAFFS_BLOCK_STATE_DEAD) {
-+ yaffs_trace(YAFFS_TRACE_BAD_BLOCKS,
-+ "block %d is bad", blk);
-+ } else if (bi->block_state == YAFFS_BLOCK_STATE_EMPTY) {
-+ yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, "Block empty ");
-+ dev->n_erased_blocks++;
-+ dev->n_free_chunks += dev->param.chunks_per_block;
-+ } else if (bi->block_state ==
-+ YAFFS_BLOCK_STATE_NEEDS_SCAN) {
-+ /* Determine the highest sequence number */
-+ if (seq_number >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
-+ seq_number < YAFFS_HIGHEST_SEQUENCE_NUMBER) {
-+ block_index[n_to_scan].seq = seq_number;
-+ block_index[n_to_scan].block = blk;
-+ n_to_scan++;
-+ if (seq_number >= dev->seq_number)
-+ dev->seq_number = seq_number;
-+ } else {
-+ /* TODO: Nasty sequence number! */
-+ yaffs_trace(YAFFS_TRACE_SCAN,
-+ "Block scanning block %d has bad sequence number %d",
-+ blk, seq_number);
-+ }
-+ }
-+ bi++;
-+ }
-+
-+ yaffs_trace(YAFFS_TRACE_ALWAYS, "%d blocks to be sorted...", n_to_scan);
-+
-+ cond_resched();
-+
-+ /* Sort the blocks by sequence number */
-+ sort(block_index, n_to_scan, sizeof(struct yaffs_block_index),
-+ yaffs2_ybicmp, NULL);
-+
-+ cond_resched();
-+
-+ yaffs_trace(YAFFS_TRACE_SCAN, "...done");
-+
-+ /* Now scan the blocks looking at the data. */
-+ start_iter = 0;
-+ end_iter = n_to_scan - 1;
-+ yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, "%d blocks to scan", n_to_scan);
-+
-+ /* For each block.... backwards */
-+ for (block_iter = end_iter;
-+ !alloc_failed && block_iter >= start_iter;
-+ block_iter--) {
-+ /* Cooperative multitasking! This loop can run for so
-+ long that watchdog timers expire. */
-+ cond_resched();
-+
-+ /* get the block to scan in the correct order */
-+ blk = block_index[block_iter].block;
-+ bi = yaffs_get_block_info(dev, blk);
-+ deleted = 0;
-+
-+ summary_available = yaffs_summary_read(dev, dev->sum_tags, blk);
-+
-+ /* For each chunk in each block that needs scanning.... */
-+ found_chunks = 0;
-+ if (summary_available)
-+ c = dev->chunks_per_summary - 1;
-+ else
-+ c = dev->param.chunks_per_block - 1;
-+
-+ for (/* c is already initialised */;
-+ !alloc_failed && c >= 0 &&
-+ (bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCAN ||
-+ bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING);
-+ c--) {
-+ /* Scan backwards...
-+ * Read the tags and decide what to do
-+ */
-+ if (yaffs2_scan_chunk(dev, bi, blk, c,
-+ &found_chunks, chunk_data,
-+ &hard_list, summary_available) ==
-+ YAFFS_FAIL)
-+ alloc_failed = 1;
-+ }
-+
-+ if (bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCAN) {
-+ /* If we got this far while scanning, then the block
-+ * is fully allocated. */
-+ bi->block_state = YAFFS_BLOCK_STATE_FULL;
-+ }
-+
-+ /* Now let's see if it was dirty */
-+ if (bi->pages_in_use == 0 &&
-+ !bi->has_shrink_hdr &&
-+ bi->block_state == YAFFS_BLOCK_STATE_FULL) {
-+ yaffs_block_became_dirty(dev, blk);
-+ }
-+ }
-+
-+ yaffs_skip_rest_of_block(dev);
-+
-+ if (alt_block_index)
-+ vfree(block_index);
-+ else
-+ kfree(block_index);
-+
-+ /* Ok, we've done all the scanning.
-+ * Fix up the hard link chains.
-+ * We have scanned all the objects, now it's time to add these
-+ * hardlinks.
-+ */
-+ yaffs_link_fixup(dev, &hard_list);
-+
-+ yaffs_release_temp_buffer(dev, chunk_data);
-+
-+ if (alloc_failed)
-+ return YAFFS_FAIL;
-+
-+ yaffs_trace(YAFFS_TRACE_SCAN, "yaffs2_scan_backwards ends");
-+
-+ return YAFFS_OK;
-+}
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yaffs_yaffs2.h linux-3.4.90/fs/yaffs2/yaffs_yaffs2.h
---- linux-3.4.90.orig/fs/yaffs2/yaffs_yaffs2.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yaffs_yaffs2.h 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,39 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YAFFS_YAFFS2_H__
-+#define __YAFFS_YAFFS2_H__
-+
-+#include "yaffs_guts.h"
-+
-+void yaffs_calc_oldest_dirty_seq(struct yaffs_dev *dev);
-+void yaffs2_find_oldest_dirty_seq(struct yaffs_dev *dev);
-+void yaffs2_clear_oldest_dirty_seq(struct yaffs_dev *dev,
-+ struct yaffs_block_info *bi);
-+void yaffs2_update_oldest_dirty_seq(struct yaffs_dev *dev, unsigned block_no,
-+ struct yaffs_block_info *bi);
-+int yaffs_block_ok_for_gc(struct yaffs_dev *dev, struct yaffs_block_info *bi);
-+u32 yaffs2_find_refresh_block(struct yaffs_dev *dev);
-+int yaffs2_checkpt_required(struct yaffs_dev *dev);
-+int yaffs_calc_checkpt_blocks_required(struct yaffs_dev *dev);
-+
-+void yaffs2_checkpt_invalidate(struct yaffs_dev *dev);
-+int yaffs2_checkpt_save(struct yaffs_dev *dev);
-+int yaffs2_checkpt_restore(struct yaffs_dev *dev);
-+
-+int yaffs2_handle_hole(struct yaffs_obj *obj, loff_t new_size);
-+int yaffs2_scan_backwards(struct yaffs_dev *dev);
-+
-+#endif
-diff -Nur linux-3.4.90.orig/fs/yaffs2/yportenv.h linux-3.4.90/fs/yaffs2/yportenv.h
---- linux-3.4.90.orig/fs/yaffs2/yportenv.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.4.90/fs/yaffs2/yportenv.h 2014-05-17 15:08:09.000000000 +0200
-@@ -0,0 +1,85 @@
-+/*
-+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002-2011 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ */
-+
-+#ifndef __YPORTENV_H__
-+#define __YPORTENV_H__
-+
-+/*
-+ * Define the MTD version in terms of Linux Kernel versions
-+ * This allows yaffs to be used independantly of the kernel
-+ * as well as with it.
-+ */
-+
-+#define MTD_VERSION(a, b, c) (((a) << 16) + ((b) << 8) + (c))
-+
-+#ifdef YAFFS_OUT_OF_TREE
-+#include "moduleconfig.h"
-+#endif
-+
-+#include <linux/version.h>
-+#define MTD_VERSION_CODE LINUX_VERSION_CODE
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
-+#include <linux/config.h>
-+#endif
-+#include <linux/version.h>
-+#include <linux/kernel.h>
-+#include <linux/mm.h>
-+#include <linux/sched.h>
-+#include <linux/string.h>
-+#include <linux/slab.h>
-+#include <linux/vmalloc.h>
-+#include <linux/xattr.h>
-+#include <linux/list.h>
-+#include <linux/types.h>
-+#include <linux/fs.h>
-+#include <linux/stat.h>
-+#include <linux/sort.h>
-+#include <linux/bitops.h>
-+
-+/* These type wrappings are used to support Unicode names in WinCE. */
-+#define YCHAR char
-+#define YUCHAR unsigned char
-+#define _Y(x) x
-+
-+#define YAFFS_LOSTNFOUND_NAME "lost+found"
-+#define YAFFS_LOSTNFOUND_PREFIX "obj"
-+
-+
-+#define YAFFS_ROOT_MODE 0755
-+#define YAFFS_LOSTNFOUND_MODE 0700
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-+#define Y_CURRENT_TIME CURRENT_TIME.tv_sec
-+#define Y_TIME_CONVERT(x) (x).tv_sec
-+#else
-+#define Y_CURRENT_TIME CURRENT_TIME
-+#define Y_TIME_CONVERT(x) (x)
-+#endif
-+
-+#define compile_time_assertion(assertion) \
-+ ({ int x = __builtin_choose_expr(assertion, 0, (void)0); (void) x; })
-+
-+
-+#define yaffs_printf(msk, fmt, ...) \
-+ printk(KERN_DEBUG "yaffs: " fmt "\n", ##__VA_ARGS__)
-+
-+#define yaffs_trace(msk, fmt, ...) do { \
-+ if (yaffs_trace_mask & (msk)) \
-+ printk(KERN_DEBUG "yaffs: " fmt "\n", ##__VA_ARGS__); \
-+} while (0)
-+
-+
-+#endif
diff --git a/target/mips/Makefile b/target/mips/Makefile
index 6f0bd728c..cb4a32432 100644
--- a/target/mips/Makefile
+++ b/target/mips/Makefile
@@ -70,13 +70,6 @@ ifeq ($(ADK_TARGET_FS),usb)
targethelp:
@echo 'The root tarball is: ${FW_DIR}/${ROOTFSTARBALL}'
endif
-ifeq ($(ADK_TARGET_FS),yaffs)
-targethelp:
- @echo 'The root tarball is: ${FW_DIR}/${ROOTFSTARBALL}'
- @echo 'Format your NAND with Routerboot, boot via NFS and'
- @echo 'then install kernel and filesystem via:'
- @echo 'adkinstall -n -a ${ROOTFSTARBALL}'
-endif
ifeq ($(ADK_TARGET_FS),genimage)
targethelp:
@echo "The disk image is: $(FW_DIR)/disk.img"
@@ -123,9 +116,6 @@ endif
ifeq ($(ADK_TARGET_FS),nfsroot)
imageinstall: kernel-install $(FW_DIR)/$(ROOTFSUSERTARBALL) targethelp
endif
-ifeq ($(ADK_TARGET_FS),yaffs)
-imageinstall: $(FW_DIR)/$(ROOTFSTARBALL) targethelp
-endif
ifeq ($(ADK_TARGET_FS),ubifs)
imageinstall: $(FW_DIR)/$(ROOTFSUBIFS) targethelp
endif
diff --git a/target/mips64/Makefile b/target/mips64/Makefile
index ae50d2344..37cc8ff58 100644
--- a/target/mips64/Makefile
+++ b/target/mips64/Makefile
@@ -28,13 +28,6 @@ ifeq ($(ADK_TARGET_SYSTEM_LEMOTE_YEELONG),y)
@echo 'PMON> g'
endif
endif
-ifeq ($(ADK_TARGET_FS),yaffs)
-targethelp:
- @echo 'The root tarball is: ${FW_DIR}/${ROOTFSTARBALL}'
- @echo 'Format your NAND with Routerboot, boot via NFS and'
- @echo 'then install kernel and filesystem via:'
- @echo 'adkinstall ${ROOTFSTARBALL}'
-endif
ifeq ($(ADK_TARGET_FS),usb)
targethelp:
@echo 'The root tarball is: ${FW_DIR}/${ROOTFSTARBALL}'