From 60cc6ce6d9e522c545713a6c6d46d0c837cd2a33 Mon Sep 17 00:00:00 2001
From: Waldemar Brodkorb <wbx@openadk.org>
Date: Sat, 28 Jun 2014 10:17:10 +0200
Subject: remove *.orig files
---
target/linux/patches/3.15.1/tcp-fastopen.patch | 1892 +-----------------------
1 file changed, 30 insertions(+), 1862 deletions(-)
diff --git a/target/linux/patches/3.15.1/tcp-fastopen.patch b/target/linux/patches/3.15.1/tcp-fastopen.patch
index fc1d076ac..982d83305 100644
--- a/target/linux/patches/3.15.1/tcp-fastopen.patch
+++ b/target/linux/patches/3.15.1/tcp-fastopen.patch
@@ -1,6 +1,6 @@
-diff -Nur linux-3.15-rc7.orig/include/linux/tcp.h linux-3.15-rc7/include/linux/tcp.h
---- linux-3.15-rc7.orig/include/linux/tcp.h 2014-05-26 01:06:00.000000000 +0200
-+++ linux-3.15-rc7/include/linux/tcp.h 2014-05-31 22:42:49.024605293 +0200
+diff -Nur linux-3.15.1.orig/include/linux/tcp.h linux-3.15.1/include/linux/tcp.h
+--- linux-3.15.1.orig/include/linux/tcp.h 2014-06-16 22:44:27.000000000 +0200
++++ linux-3.15.1/include/linux/tcp.h 2014-06-28 10:10:20.616857903 +0200
@@ -359,6 +359,9 @@
return (struct tcp_timewait_sock *)sk;
}
@@ -34,9 +34,9 @@ diff -Nur linux-3.15-rc7.orig/include/linux/tcp.h linux-3.15-rc7/include/linux/t
+#endif
+
#endif /* _LINUX_TCP_H */
-diff -Nur linux-3.15-rc7.orig/include/net/request_sock.h linux-3.15-rc7/include/net/request_sock.h
---- linux-3.15-rc7.orig/include/net/request_sock.h 2014-05-26 01:06:00.000000000 +0200
-+++ linux-3.15-rc7/include/net/request_sock.h 2014-05-31 22:42:49.024605293 +0200
+diff -Nur linux-3.15.1.orig/include/net/request_sock.h linux-3.15.1/include/net/request_sock.h
+--- linux-3.15.1.orig/include/net/request_sock.h 2014-06-16 22:44:27.000000000 +0200
++++ linux-3.15.1/include/net/request_sock.h 2014-06-28 10:10:20.620857907 +0200
@@ -168,8 +168,13 @@
void __reqsk_queue_destroy(struct request_sock_queue *queue);
@@ -51,9 +51,9 @@ diff -Nur linux-3.15-rc7.orig/include/net/request_sock.h linux-3.15-rc7/include/
static inline struct request_sock *
reqsk_queue_yank_acceptq(struct request_sock_queue *queue)
-diff -Nur linux-3.15-rc7.orig/include/net/tcp.h linux-3.15-rc7/include/net/tcp.h
---- linux-3.15-rc7.orig/include/net/tcp.h 2014-05-26 01:06:00.000000000 +0200
-+++ linux-3.15-rc7/include/net/tcp.h 2014-05-31 22:42:49.028605326 +0200
+diff -Nur linux-3.15.1.orig/include/net/tcp.h linux-3.15.1/include/net/tcp.h
+--- linux-3.15.1.orig/include/net/tcp.h 2014-06-16 22:44:27.000000000 +0200
++++ linux-3.15.1/include/net/tcp.h 2014-06-28 10:10:20.620857907 +0200
@@ -251,7 +251,11 @@
extern int sysctl_tcp_retries2;
extern int sysctl_tcp_orphan_retries;
@@ -79,1613 +79,9 @@ diff -Nur linux-3.15-rc7.orig/include/net/tcp.h linux-3.15-rc7/include/net/tcp.h
extern struct tcp_fastopen_context __rcu *tcp_fastopen_ctx;
int tcp_fastopen_reset_cipher(void *key, unsigned int len);
-diff -Nur linux-3.15-rc7.orig/include/net/tcp.h.orig linux-3.15-rc7/include/net/tcp.h.orig
---- linux-3.15-rc7.orig/include/net/tcp.h.orig 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.15-rc7/include/net/tcp.h.orig 2014-05-26 01:06:00.000000000 +0200
-@@ -0,0 +1,1600 @@
-+/*
-+ * INET An implementation of the TCP/IP protocol suite for the LINUX
-+ * operating system. INET is implemented using the BSD Socket
-+ * interface as the means of communication with the user level.
-+ *
-+ * Definitions for the TCP module.
-+ *
-+ * Version: @(#)tcp.h 1.0.5 05/23/93
-+ *
-+ * Authors: Ross Biro
-+ * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
-+ *
-+ * This program is free software; you can redistribute it and/or
-+ * modify it under the terms of the GNU General Public License
-+ * as published by the Free Software Foundation; either version
-+ * 2 of the License, or (at your option) any later version.
-+ */
-+#ifndef _TCP_H
-+#define _TCP_H
-+
-+#define FASTRETRANS_DEBUG 1
-+
-+#include <linux/list.h>
-+#include <linux/tcp.h>
-+#include <linux/bug.h>
-+#include <linux/slab.h>
-+#include <linux/cache.h>
-+#include <linux/percpu.h>
-+#include <linux/skbuff.h>
-+#include <linux/dmaengine.h>
-+#include <linux/crypto.h>
-+#include <linux/cryptohash.h>
-+#include <linux/kref.h>
-+#include <linux/ktime.h>
-+
-+#include <net/inet_connection_sock.h>
-+#include <net/inet_timewait_sock.h>
-+#include <net/inet_hashtables.h>
-+#include <net/checksum.h>
-+#include <net/request_sock.h>
-+#include <net/sock.h>
-+#include <net/snmp.h>
-+#include <net/ip.h>
-+#include <net/tcp_states.h>
-+#include <net/inet_ecn.h>
-+#include <net/dst.h>
-+
-+#include <linux/seq_file.h>
-+#include <linux/memcontrol.h>
-+
-+extern struct inet_hashinfo tcp_hashinfo;
-+
-+extern struct percpu_counter tcp_orphan_count;
-+void tcp_time_wait(struct sock *sk, int state, int timeo);
-+
-+#define MAX_TCP_HEADER (128 + MAX_HEADER)
-+#define MAX_TCP_OPTION_SPACE 40
-+
-+/*
-+ * Never offer a window over 32767 without using window scaling. Some
-+ * poor stacks do signed 16bit maths!
-+ */
-+#define MAX_TCP_WINDOW 32767U
-+
-+/* Minimal accepted MSS. It is (60+60+8) - (20+20). */
-+#define TCP_MIN_MSS 88U
-+
-+/* The least MTU to use for probing */
-+#define TCP_BASE_MSS 512
-+
-+/* After receiving this amount of duplicate ACKs fast retransmit starts. */
-+#define TCP_FASTRETRANS_THRESH 3
-+
-+/* Maximal reordering. */
-+#define TCP_MAX_REORDERING 127
-+
-+/* Maximal number of ACKs sent quickly to accelerate slow-start. */
-+#define TCP_MAX_QUICKACKS 16U
-+
-+/* urg_data states */
-+#define TCP_URG_VALID 0x0100
-+#define TCP_URG_NOTYET 0x0200
-+#define TCP_URG_READ 0x0400
-+
-+#define TCP_RETR1 3 /*
-+ * This is how many retries it does before it
-+ * tries to figure out if the gateway is
-+ * down. Minimal RFC value is 3; it corresponds
-+ * to ~3sec-8min depending on RTO.
-+ */
-+
-+#define TCP_RETR2 15 /*
-+ * This should take at least
-+ * 90 minutes to time out.
-+ * RFC1122 says that the limit is 100 sec.
-+ * 15 is ~13-30min depending on RTO.
-+ */
-+
-+#define TCP_SYN_RETRIES 6 /* This is how many retries are done
-+ * when active opening a connection.
-+ * RFC1122 says the minimum retry MUST
-+ * be at least 180secs. Nevertheless
-+ * this value is corresponding to
-+ * 63secs of retransmission with the
-+ * current initial RTO.
-+ */
-+
-+#define TCP_SYNACK_RETRIES 5 /* This is how may retries are done
-+ * when passive opening a connection.
-+ * This is corresponding to 31secs of
-+ * retransmission with the current
-+ * initial RTO.
-+ */
-+
-+#define TCP_TIMEWAIT_LEN (60*HZ) /* how long to wait to destroy TIME-WAIT
-+ * state, about 60 seconds */
-+#define TCP_FIN_TIMEOUT TCP_TIMEWAIT_LEN
-+ /* BSD style FIN_WAIT2 deadlock breaker.
-+ * It used to be 3min, new value is 60sec,
-+ * to combine FIN-WAIT-2 timeout with
-+ * TIME-WAIT timer.
-+ */
-+
-+#define TCP_DELACK_MAX ((unsigned)(HZ/5)) /* maximal time to delay before sending an ACK */
-+#if HZ >= 100
-+#define TCP_DELACK_MIN ((unsigned)(HZ/25)) /* minimal time to delay before sending an ACK */
-+#define TCP_ATO_MIN ((unsigned)(HZ/25))
-+#else
-+#define TCP_DELACK_MIN 4U
-+#define TCP_ATO_MIN 4U
-+#endif
-+#define TCP_RTO_MAX ((unsigned)(120*HZ))
-+#define TCP_RTO_MIN ((unsigned)(HZ/5))
-+#define TCP_TIMEOUT_INIT ((unsigned)(1*HZ)) /* RFC6298 2.1 initial RTO value */
-+#define TCP_TIMEOUT_FALLBACK ((unsigned)(3*HZ)) /* RFC 1122 initial RTO value, now
-+ * used as a fallback RTO for the
-+ * initial data transmission if no
-+ * valid RTT sample has been acquired,
-+ * most likely due to retrans in 3WHS.
-+ */
-+
-+#define TCP_RESOURCE_PROBE_INTERVAL ((unsigned)(HZ/2U)) /* Maximal interval between probes
-+ * for local resources.
-+ */
-+
-+#define TCP_KEEPALIVE_TIME (120*60*HZ) /* two hours */
-+#define TCP_KEEPALIVE_PROBES 9 /* Max of 9 keepalive probes */
-+#define TCP_KEEPALIVE_INTVL (75*HZ)
-+
-+#define MAX_TCP_KEEPIDLE 32767
-+#define MAX_TCP_KEEPINTVL 32767
-+#define MAX_TCP_KEEPCNT 127
-+#define MAX_TCP_SYNCNT 127
-+
-+#define TCP_SYNQ_INTERVAL (HZ/5) /* Period of SYNACK timer */
-+
-+#define TCP_PAWS_24DAYS (60 * 60 * 24 * 24)
-+#define TCP_PAWS_MSL 60 /* Per-host timestamps are invalidated
-+ * after this time. It should be equal
-+ * (or greater than) TCP_TIMEWAIT_LEN
-+ * to provide reliability equal to one
-+ * provided by timewait state.
-+ */
-+#define TCP_PAWS_WINDOW 1 /* Replay window for per-host
-+ * timestamps. It must be less than
-+ * minimal timewait lifetime.
-+ */
-+/*
-+ * TCP option
-+ */
-+
-+#define TCPOPT_NOP 1 /* Padding */
-+#define TCPOPT_EOL 0 /* End of options */
-+#define TCPOPT_MSS 2 /* Segment size negotiating */
-+#define TCPOPT_WINDOW 3 /* Window scaling */
-+#define TCPOPT_SACK_PERM 4 /* SACK Permitted */
-+#define TCPOPT_SACK 5 /* SACK Block */
-+#define TCPOPT_TIMESTAMP 8 /* Better RTT estimations/PAWS */
-+#define TCPOPT_MD5SIG 19 /* MD5 Signature (RFC2385) */
-+#define TCPOPT_EXP 254 /* Experimental */
-+/* Magic number to be after the option value for sharing TCP
-+ * experimental options. See draft-ietf-tcpm-experimental-options-00.txt
-+ */
-+#define TCPOPT_FASTOPEN_MAGIC 0xF989
-+
-+/*
-+ * TCP option lengths
-+ */
-+
-+#define TCPOLEN_MSS 4
-+#define TCPOLEN_WINDOW 3
-+#define TCPOLEN_SACK_PERM 2
-+#define TCPOLEN_TIMESTAMP 10
-+#define TCPOLEN_MD5SIG 18
-+#define TCPOLEN_EXP_FASTOPEN_BASE 4
-+
-+/* But this is what stacks really send out. */
-+#define TCPOLEN_TSTAMP_ALIGNED 12
-+#define TCPOLEN_WSCALE_ALIGNED 4
-+#define TCPOLEN_SACKPERM_ALIGNED 4
-+#define TCPOLEN_SACK_BASE 2
-+#define TCPOLEN_SACK_BASE_ALIGNED 4
-+#define TCPOLEN_SACK_PERBLOCK 8
-+#define TCPOLEN_MD5SIG_ALIGNED 20
-+#define TCPOLEN_MSS_ALIGNED 4
-+
-+/* Flags in tp->nonagle */
-+#define TCP_NAGLE_OFF 1 /* Nagle's algo is disabled */
-+#define TCP_NAGLE_CORK 2 /* Socket is corked */
-+#define TCP_NAGLE_PUSH 4 /* Cork is overridden for already queued data */
-+
-+/* TCP thin-stream limits */
-+#define TCP_THIN_LINEAR_RETRIES 6 /* After 6 linear retries, do exp. backoff */
-+
-+/* TCP initial congestion window as per draft-hkchu-tcpm-initcwnd-01 */
-+#define TCP_INIT_CWND 10
-+
-+/* Bit Flags for sysctl_tcp_fastopen */
-+#define TFO_CLIENT_ENABLE 1
-+#define TFO_SERVER_ENABLE 2
-+#define TFO_CLIENT_NO_COOKIE 4 /* Data in SYN w/o cookie option */
-+
-+/* Process SYN data but skip cookie validation */
-+#define TFO_SERVER_COOKIE_NOT_CHKED 0x100
-+/* Accept SYN data w/o any cookie option */
-+#define TFO_SERVER_COOKIE_NOT_REQD 0x200
-+
-+/* Force enable TFO on all listeners, i.e., not requiring the
-+ * TCP_FASTOPEN socket option. SOCKOPT1/2 determine how to set max_qlen.
-+ */
-+#define TFO_SERVER_WO_SOCKOPT1 0x400
-+#define TFO_SERVER_WO_SOCKOPT2 0x800
-+/* Always create TFO child sockets on a TFO listener even when
-+ * cookie/data not present. (For testing purpose!)
-+ */
-+#define TFO_SERVER_ALWAYS 0x1000
-+
-+extern struct inet_timewait_death_row tcp_death_row;
-+
-+/* sysctl variables for tcp */
-+extern int sysctl_tcp_timestamps;
-+extern int sysctl_tcp_window_scaling;
-+extern int sysctl_tcp_sack;
-+extern int sysctl_tcp_fin_timeout;
-+extern int sysctl_tcp_keepalive_time;
-+extern int sysctl_tcp_keepalive_probes;
-+extern int sysctl_tcp_keepalive_intvl;
-+extern int sysctl_tcp_syn_retries;
-+extern int sysctl_tcp_synack_retries;
-+extern int sysctl_tcp_retries1;
-+extern int sysctl_tcp_retries2;
-+extern int sysctl_tcp_orphan_retries;
-+extern int sysctl_tcp_syncookies;
-+extern int sysctl_tcp_fastopen;
-+extern int sysctl_tcp_retrans_collapse;
-+extern int sysctl_tcp_stdurg;
-+extern int sysctl_tcp_rfc1337;
-+extern int sysctl_tcp_abort_on_overflow;
-+extern int sysctl_tcp_max_orphans;
-+extern int sysctl_tcp_fack;
-+extern int sysctl_tcp_reordering;
-+extern int sysctl_tcp_dsack;
-+extern long sysctl_tcp_mem[3];
-+extern int sysctl_tcp_wmem[3];
-+extern int sysctl_tcp_rmem[3];
-+extern int sysctl_tcp_app_win;
-+extern int sysctl_tcp_adv_win_scale;
-+extern int sysctl_tcp_tw_reuse;
-+extern int sysctl_tcp_frto;
-+extern int sysctl_tcp_low_latency;
-+extern int sysctl_tcp_dma_copybreak;
-+extern int sysctl_tcp_nometrics_save;
-+extern int sysctl_tcp_moderate_rcvbuf;
-+extern int sysctl_tcp_tso_win_divisor;
-+extern int sysctl_tcp_mtu_probing;
-+extern int sysctl_tcp_base_mss;
-+extern int sysctl_tcp_workaround_signed_windows;
-+extern int sysctl_tcp_slow_start_after_idle;
-+extern int sysctl_tcp_thin_linear_timeouts;
-+extern int sysctl_tcp_thin_dupack;
-+extern int sysctl_tcp_early_retrans;
-+extern int sysctl_tcp_limit_output_bytes;
-+extern int sysctl_tcp_challenge_ack_limit;
-+extern unsigned int sysctl_tcp_notsent_lowat;
-+extern int sysctl_tcp_min_tso_segs;
-+extern int sysctl_tcp_autocorking;
-+
-+extern atomic_long_t tcp_memory_allocated;
-+extern struct percpu_counter tcp_sockets_allocated;
-+extern int tcp_memory_pressure;
-+
-+/*
-+ * The next routines deal with comparing 32 bit unsigned ints
-+ * and worry about wraparound (automatic with unsigned arithmetic).
-+ */
-+
-+static inline bool before(__u32 seq1, __u32 seq2)
-+{
-+ return (__s32)(seq1-seq2) < 0;
-+}
-+#define after(seq2, seq1) before(seq1, seq2)
-+
-+/* is s2<=s1<=s3 ? */
-+static inline bool between(__u32 seq1, __u32 seq2, __u32 seq3)
-+{
-+ return seq3 - seq2 >= seq1 - seq2;
-+}
-+
-+static inline bool tcp_out_of_memory(struct sock *sk)
-+{
-+ if (sk->sk_wmem_queued > SOCK_MIN_SNDBUF &&
-+ sk_memory_allocated(sk) > sk_prot_mem_limits(sk, 2))
-+ return true;
-+ return false;
-+}
-+
-+static inline bool tcp_too_many_orphans(struct sock *sk, int shift)
-+{
-+ struct percpu_counter *ocp = sk->sk_prot->orphan_count;
-+ int orphans = percpu_counter_read_positive(ocp);
-+
-+ if (orphans << shift > sysctl_tcp_max_orphans) {
-+ orphans = percpu_counter_sum_positive(ocp);
-+ if (orphans << shift > sysctl_tcp_max_orphans)
-+ return true;
-+ }
-+ return false;
-+}
-+
-+bool tcp_check_oom(struct sock *sk, int shift);
-+
-+/* syncookies: remember time of last synqueue overflow */
-+static inline void tcp_synq_overflow(struct sock *sk)
-+{
-+ tcp_sk(sk)->rx_opt.ts_recent_stamp = jiffies;
-+}
-+
-+/* syncookies: no recent synqueue overflow on this listening socket? */
-+static inline bool tcp_synq_no_recent_overflow(const struct sock *sk)
-+{
-+ unsigned long last_overflow = tcp_sk(sk)->rx_opt.ts_recent_stamp;
-+ return time_after(jiffies, last_overflow + TCP_TIMEOUT_FALLBACK);
-+}
-+
-+extern struct proto tcp_prot;
-+
-+#define TCP_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.tcp_statistics, field)
-+#define TCP_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.tcp_statistics, field)
-+#define TCP_DEC_STATS(net, field) SNMP_DEC_STATS((net)->mib.tcp_statistics, field)
-+#define TCP_ADD_STATS_USER(net, field, val) SNMP_ADD_STATS_USER((net)->mib.tcp_statistics, field, val)
-+#define TCP_ADD_STATS(net, field, val) SNMP_ADD_STATS((net)->mib.tcp_statistics, field, val)
-+
-+void tcp_tasklet_init(void);
-+
-+void tcp_v4_err(struct sk_buff *skb, u32);
-+
-+void tcp_shutdown(struct sock *sk, int how);
-+
-+void tcp_v4_early_demux(struct sk_buff *skb);
-+int tcp_v4_rcv(struct sk_buff *skb);
-+
-+int tcp_v4_tw_remember_stamp(struct inet_timewait_sock *tw);
-+int tcp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
-+ size_t size);
-+int tcp_sendpage(struct sock *sk, struct page *page, int offset, size_t size,
-+ int flags);
-+void tcp_release_cb(struct sock *sk);
-+void tcp_wfree(struct sk_buff *skb);
-+void tcp_write_timer_handler(struct sock *sk);
-+void tcp_delack_timer_handler(struct sock *sk);
-+int tcp_ioctl(struct sock *sk, int cmd, unsigned long arg);
-+int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
-+ const struct tcphdr *th, unsigned int len);
-+void tcp_rcv_established(struct sock *sk, struct sk_buff *skb,
-+ const struct tcphdr *th, unsigned int len);
-+void tcp_rcv_space_adjust(struct sock *sk);
-+void tcp_cleanup_rbuf(struct sock *sk, int copied);
-+int tcp_twsk_unique(struct sock *sk, struct sock *sktw, void *twp);
-+void tcp_twsk_destructor(struct sock *sk);
-+ssize_t tcp_splice_read(struct socket *sk, loff_t *ppos,
-+ struct pipe_inode_info *pipe, size_t len,
-+ unsigned int flags);
-+
-+static inline void tcp_dec_quickack_mode(struct sock *sk,
-+ const unsigned int pkts)
-+{
-+ struct inet_connection_sock *icsk = inet_csk(sk);
-+
-+ if (icsk->icsk_ack.quick) {
-+ if (pkts >= icsk->icsk_ack.quick) {
-+ icsk->icsk_ack.quick = 0;
-+ /* Leaving quickack mode we deflate ATO. */
-+ icsk->icsk_ack.ato = TCP_ATO_MIN;
-+ } else
-+ icsk->icsk_ack.quick -= pkts;
-+ }
-+}
-+
-+#define TCP_ECN_OK 1
-+#define TCP_ECN_QUEUE_CWR 2
-+#define TCP_ECN_DEMAND_CWR 4
-+#define TCP_ECN_SEEN 8
-+
-+enum tcp_tw_status {
-+ TCP_TW_SUCCESS = 0,
-+ TCP_TW_RST = 1,
-+ TCP_TW_ACK = 2,
-+ TCP_TW_SYN = 3
-+};
-+
-+
-+enum tcp_tw_status tcp_timewait_state_process(struct inet_timewait_sock *tw,
-+ struct sk_buff *skb,
-+ const struct tcphdr *th);
-+struct sock *tcp_check_req(struct sock *sk, struct sk_buff *skb,
-+ struct request_sock *req, struct request_sock **prev,
-+ bool fastopen);
-+int tcp_child_process(struct sock *parent, struct sock *child,
-+ struct sk_buff *skb);
-+void tcp_enter_loss(struct sock *sk, int how);
-+void tcp_clear_retrans(struct tcp_sock *tp);
-+void tcp_update_metrics(struct sock *sk);
-+void tcp_init_metrics(struct sock *sk);
-+void tcp_metrics_init(void);
-+bool tcp_peer_is_proven(struct request_sock *req, struct dst_entry *dst,
-+ bool paws_check);
-+bool tcp_remember_stamp(struct sock *sk);
-+bool tcp_tw_remember_stamp(struct inet_timewait_sock *tw);
-+void tcp_fetch_timewait_stamp(struct sock *sk, struct dst_entry *dst);
-+void tcp_disable_fack(struct tcp_sock *tp);
-+void tcp_close(struct sock *sk, long timeout);
-+void tcp_init_sock(struct sock *sk);
-+unsigned int tcp_poll(struct file *file, struct socket *sock,
-+ struct poll_table_struct *wait);
-+int tcp_getsockopt(struct sock *sk, int level, int optname,
-+ char __user *optval, int __user *optlen);
-+int tcp_setsockopt(struct sock *sk, int level, int optname,
-+ char __user *optval, unsigned int optlen);
-+int compat_tcp_getsockopt(struct sock *sk, int level, int optname,
-+ char __user *optval, int __user *optlen);
-+int compat_tcp_setsockopt(struct sock *sk, int level, int optname,
-+ char __user *optval, unsigned int optlen);
-+void tcp_set_keepalive(struct sock *sk, int val);
-+void tcp_syn_ack_timeout(struct sock *sk, struct request_sock *req);
-+int tcp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
-+ size_t len, int nonblock, int flags, int *addr_len);
-+void tcp_parse_options(const struct sk_buff *skb,
-+ struct tcp_options_received *opt_rx,
-+ int estab, struct tcp_fastopen_cookie *foc);
-+const u8 *tcp_parse_md5sig_option(const struct tcphdr *th);
-+
-+/*
-+ * TCP v4 functions exported for the inet6 API
-+ */
-+
-+void tcp_v4_send_check(struct sock *sk, struct sk_buff *skb);
-+int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb);
-+struct sock *tcp_create_openreq_child(struct sock *sk,
-+ struct request_sock *req,
-+ struct sk_buff *skb);
-+struct sock *tcp_v4_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
-+ struct request_sock *req,
-+ struct dst_entry *dst);
-+int tcp_v4_do_rcv(struct sock *sk, struct sk_buff *skb);
-+int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len);
-+int tcp_connect(struct sock *sk);
-+struct sk_buff *tcp_make_synack(struct sock *sk, struct dst_entry *dst,
-+ struct request_sock *req,
-+ struct tcp_fastopen_cookie *foc);
-+int tcp_disconnect(struct sock *sk, int flags);
-+
-+void tcp_finish_connect(struct sock *sk, struct sk_buff *skb);
-+int tcp_send_rcvq(struct sock *sk, struct msghdr *msg, size_t size);
-+void inet_sk_rx_dst_set(struct sock *sk, const struct sk_buff *skb);
-+
-+/* From syncookies.c */
-+int __cookie_v4_check(const struct iphdr *iph, const struct tcphdr *th,
-+ u32 cookie);
-+struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb,
-+ struct ip_options *opt);
-+#ifdef CONFIG_SYN_COOKIES
-+
-+/* Syncookies use a monotonic timer which increments every 60 seconds.
-+ * This counter is used both as a hash input and partially encoded into
-+ * the cookie value. A cookie is only validated further if the delta
-+ * between the current counter value and the encoded one is less than this,
-+ * i.e. a sent cookie is valid only at most for 2*60 seconds (or less if
-+ * the counter advances immediately after a cookie is generated).
-+ */
-+#define MAX_SYNCOOKIE_AGE 2
-+
-+static inline u32 tcp_cookie_time(void)
-+{
-+ u64 val = get_jiffies_64();
-+
-+ do_div(val, 60 * HZ);
-+ return val;
-+}
-+
-+u32 __cookie_v4_init_sequence(const struct iphdr *iph, const struct tcphdr *th,
-+ u16 *mssp);
-+__u32 cookie_v4_init_sequence(struct sock *sk, struct sk_buff *skb, __u16 *mss);
-+#else
-+static inline __u32 cookie_v4_init_sequence(struct sock *sk,
-+ struct sk_buff *skb,
-+ __u16 *mss)
-+{
-+ return 0;
-+}
-+#endif
-+
-+__u32 cookie_init_timestamp(struct request_sock *req);
-+bool cookie_check_timestamp(struct tcp_options_received *opt, struct net *net,
-+ bool *ecn_ok);
-+
-+/* From net/ipv6/syncookies.c */
-+int __cookie_v6_check(const struct ipv6hdr *iph, const struct tcphdr *th,
-+ u32 cookie);
-+struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb);
-+#ifdef CONFIG_SYN_COOKIES
-+u32 __cookie_v6_init_sequence(const struct ipv6hdr *iph,
-+ const struct tcphdr *th, u16 *mssp);
-+__u32 cookie_v6_init_sequence(struct sock *sk, const struct sk_buff *skb,
-+ __u16 *mss);
-+#else
-+static inline __u32 cookie_v6_init_sequence(struct sock *sk,
-+ struct sk_buff *skb,
-+ __u16 *mss)
-+{
-+ return 0;
-+}
-+#endif
-+/* tcp_output.c */
-+
-+void __tcp_push_pending_frames(struct sock *sk, unsigned int cur_mss,
-+ int nonagle);
-+bool tcp_may_send_now(struct sock *sk);
-+int __tcp_retransmit_skb(struct sock *, struct sk_buff *);
-+int tcp_retransmit_skb(struct sock *, struct sk_buff *);
-+void tcp_retransmit_timer(struct sock *sk);
-+void tcp_xmit_retransmit_queue(struct sock *);
-+void tcp_simple_retransmit(struct sock *);
-+int tcp_trim_head(struct sock *, struct sk_buff *, u32);
-+int tcp_fragment(struct sock *, struct sk_buff *, u32, unsigned int);
-+
-+void tcp_send_probe0(struct sock *);
-+void tcp_send_partial(struct sock *);
-+int tcp_write_wakeup(struct sock *);
-+void tcp_send_fin(struct sock *sk);
-+void tcp_send_active_reset(struct sock *sk, gfp_t priority);
-+int tcp_send_synack(struct sock *);
-+bool tcp_syn_flood_action(struct sock *sk, const struct sk_buff *skb,
-+ const char *proto);
-+void tcp_push_one(struct sock *, unsigned int mss_now);
-+void tcp_send_ack(struct sock *sk);
-+void tcp_send_delayed_ack(struct sock *sk);
-+void tcp_send_loss_probe(struct sock *sk);
-+bool tcp_schedule_loss_probe(struct sock *sk);
-+
-+/* tcp_input.c */
-+void tcp_cwnd_application_limited(struct sock *sk);
-+void tcp_resume_early_retransmit(struct sock *sk);
-+void tcp_rearm_rto(struct sock *sk);
-+void tcp_reset(struct sock *sk);
-+
-+/* tcp_timer.c */
-+void tcp_init_xmit_timers(struct sock *);
-+static inline void tcp_clear_xmit_timers(struct sock *sk)
-+{
-+ inet_csk_clear_xmit_timers(sk);
-+}
-+
-+unsigned int tcp_sync_mss(struct sock *sk, u32 pmtu);
-+unsigned int tcp_current_mss(struct sock *sk);
-+
-+/* Bound MSS / TSO packet size with the half of the window */
-+static inline int tcp_bound_to_half_wnd(struct tcp_sock *tp, int pktsize)
-+{
-+ int cutoff;
-+
-+ /* When peer uses tiny windows, there is no use in packetizing
-+ * to sub-MSS pieces for the sake of SWS or making sure there
-+ * are enough packets in the pipe for fast recovery.
-+ *
-+ * On the other hand, for extremely large MSS devices, handling
-+ * smaller than MSS windows in this way does make sense.
-+ */
-+ if (tp->max_window >= 512)
-+ cutoff = (tp->max_window >> 1);
-+ else
-+ cutoff = tp->max_window;
-+
-+ if (cutoff && pktsize > cutoff)
-+ return max_t(int, cutoff, 68U - tp->tcp_header_len);
-+ else
-+ return pktsize;
-+}
-+
-+/* tcp.c */
-+void tcp_get_info(const struct sock *, struct tcp_info *);
-+
-+/* Read 'sendfile()'-style from a TCP socket */
-+typedef int (*sk_read_actor_t)(read_descriptor_t *, struct sk_buff *,
-+ unsigned int, size_t);
-+int tcp_read_sock(struct sock *sk, read_descriptor_t *desc,
-+ sk_read_actor_t recv_actor);
-+
-+void tcp_initialize_rcv_mss(struct sock *sk);
-+
-+int tcp_mtu_to_mss(struct sock *sk, int pmtu);
-+int tcp_mss_to_mtu(struct sock *sk, int mss);
-+void tcp_mtup_init(struct sock *sk);
-+void tcp_init_buffer_space(struct sock *sk);
-+
-+static inline void tcp_bound_rto(const struct sock *sk)
-+{
-+ if (inet_csk(sk)->icsk_rto > TCP_RTO_MAX)
-+ inet_csk(sk)->icsk_rto = TCP_RTO_MAX;
-+}
-+
-+static inline u32 __tcp_set_rto(const struct tcp_sock *tp)
-+{
-+ return usecs_to_jiffies((tp->srtt_us >> 3) + tp->rttvar_us);
-+}
-+
-+static inline void __tcp_fast_path_on(struct tcp_sock *tp, u32 snd_wnd)
-+{
-+ tp->pred_flags = htonl((tp->tcp_header_len << 26) |
-+ ntohl(TCP_FLAG_ACK) |
-+ snd_wnd);
-+}
-+
-+static inline void tcp_fast_path_on(struct tcp_sock *tp)
-+{
-+ __tcp_fast_path_on(tp, tp->snd_wnd >> tp->rx_opt.snd_wscale);
-+}
-+
-+static inline void tcp_fast_path_check(struct sock *sk)
-+{
-+ struct tcp_sock *tp = tcp_sk(sk);
-+
-+ if (skb_queue_empty(&tp->out_of_order_queue) &&
-+ tp->rcv_wnd &&
-+ atomic_read(&sk->sk_rmem_alloc) < sk->sk_rcvbuf &&
-+ !tp->urg_data)
-+ tcp_fast_path_on(tp);
-+}
-+
-+/* Compute the actual rto_min value */
-+static inline u32 tcp_rto_min(struct sock *sk)
-+{
-+ const struct dst_entry *dst = __sk_dst_get(sk);
-+ u32 rto_min = TCP_RTO_MIN;
-+
-+ if (dst && dst_metric_locked(dst, RTAX_RTO_MIN))
-+ rto_min = dst_metric_rtt(dst, RTAX_RTO_MIN);
-+ return rto_min;
-+}
-+
-+static inline u32 tcp_rto_min_us(struct sock *sk)
-+{
-+ return jiffies_to_usecs(tcp_rto_min(sk));
-+}
-+
-+/* Compute the actual receive window we are currently advertising.
-+ * Rcv_nxt can be after the window if our peer push more data
-+ * than the offered window.
-+ */
-+static inline u32 tcp_receive_window(const struct tcp_sock *tp)
-+{
-+ s32 win = tp->rcv_wup + tp->rcv_wnd - tp->rcv_nxt;
-+
-+ if (win < 0)
-+ win = 0;
-+ return (u32) win;
-+}
-+
-+/* Choose a new window, without checks for shrinking, and without
-+ * scaling applied to the result. The caller does these things
-+ * if necessary. This is a "raw" window selection.
-+ */
-+u32 __tcp_select_window(struct sock *sk);
-+
-+void tcp_send_window_probe(struct sock *sk);
-+
-+/* TCP timestamps are only 32-bits, this causes a slight
-+ * complication on 64-bit systems since we store a snapshot
-+ * of jiffies in the buffer control blocks below. We decided
-+ * to use only the low 32-bits of jiffies and hide the ugly
-+ * casts with the following macro.
-+ */
-+#define tcp_time_stamp ((__u32)(jiffies))
-+
-+#define tcp_flag_byte(th) (((u_int8_t *)th)[13])
-+
-+#define TCPHDR_FIN 0x01
-+#define TCPHDR_SYN 0x02
-+#define TCPHDR_RST 0x04
-+#define TCPHDR_PSH 0x08
-+#define TCPHDR_ACK 0x10
-+#define TCPHDR_URG 0x20
-+#define TCPHDR_ECE 0x40
-+#define TCPHDR_CWR 0x80
-+
-+/* This is what the send packet queuing engine uses to pass
-+ * TCP per-packet control information to the transmission code.
-+ * We also store the host-order sequence numbers in here too.
-+ * This is 44 bytes if IPV6 is enabled.
-+ * If this grows please adjust skbuff.h:skbuff->cb[xxx] size appropriately.
-+ */
-+struct tcp_skb_cb {
-+ union {
-+ struct inet_skb_parm h4;
-+#if IS_ENABLED(CONFIG_IPV6)
-+ struct inet6_skb_parm h6;
-+#endif
-+ } header; /* For incoming frames */
-+ __u32 seq; /* Starting sequence number */
-+ __u32 end_seq; /* SEQ + FIN + SYN + datalen */
-+ __u32 when; /* used to compute rtt's */
-+ __u8 tcp_flags; /* TCP header flags. (tcp[13]) */
-+
-+ __u8 sacked; /* State flags for SACK/FACK. */
-+#define TCPCB_SACKED_ACKED 0x01 /* SKB ACK'd by a SACK block */
-+#define TCPCB_SACKED_RETRANS 0x02 /* SKB retransmitted */
-+#define TCPCB_LOST 0x04 /* SKB is lost */
-+#define TCPCB_TAGBITS 0x07 /* All tag bits */
-+#define TCPCB_EVER_RETRANS 0x80 /* Ever retransmitted frame */
-+#define TCPCB_RETRANS (TCPCB_SACKED_RETRANS|TCPCB_EVER_RETRANS)
-+
-+ __u8 ip_dsfield; /* IPv4 tos or IPv6 dsfield */
-+ /* 1 byte hole */
-+ __u32 ack_seq; /* Sequence number ACK'd */
-+};
-+
-+#define TCP_SKB_CB(__skb) ((struct tcp_skb_cb *)&((__skb)->cb[0]))
-+
-+/* RFC3168 : 6.1.1 SYN packets must not have ECT/ECN bits set
-+ *
-+ * If we receive a SYN packet with these bits set, it means a network is
-+ * playing bad games with TOS bits. In order to avoid possible false congestion
-+ * notifications, we disable TCP ECN negociation.
-+ */
-+static inline void
-+TCP_ECN_create_request(struct request_sock *req, const struct sk_buff *skb,
-+ struct net *net)
-+{
-+ const struct tcphdr *th = tcp_hdr(skb);
-+
-+ if (net->ipv4.sysctl_tcp_ecn && th->ece && th->cwr &&
-+ INET_ECN_is_not_ect(TCP_SKB_CB(skb)->ip_dsfield))
-+ inet_rsk(req)->ecn_ok = 1;
-+}
-+
-+/* Due to TSO, an SKB can be composed of multiple actual
-+ * packets. To keep these tracked properly, we use this.
-+ */
-+static inline int tcp_skb_pcount(const struct sk_buff *skb)
-+{
-+ return skb_shinfo(skb)->gso_segs;
-+}
-+
-+/* This is valid iff tcp_skb_pcount() > 1. */
-+static inline int tcp_skb_mss(const struct sk_buff *skb)
-+{
-+ return skb_shinfo(skb)->gso_size;
-+}
-+
-+/* Events passed to congestion control interface */
-+enum tcp_ca_event {
-+ CA_EVENT_TX_START, /* first transmit when no packets in flight */
-+ CA_EVENT_CWND_RESTART, /* congestion window restart */
-+ CA_EVENT_COMPLETE_CWR, /* end of congestion recovery */
-+ CA_EVENT_LOSS, /* loss timeout */
-+ CA_EVENT_FAST_ACK, /* in sequence ack */
-+ CA_EVENT_SLOW_ACK, /* other ack */
-+};
-+
-+/*
-+ * Interface for adding new TCP congestion control handlers
-+ */
-+#define TCP_CA_NAME_MAX 16
-+#define TCP_CA_MAX 128
-+#define TCP_CA_BUF_MAX (TCP_CA_NAME_MAX*TCP_CA_MAX)
-+
-+#define TCP_CONG_NON_RESTRICTED 0x1
-+
-+struct tcp_congestion_ops {
-+ struct list_head list;
-+ unsigned long flags;
-+
-+ /* initialize private data (optional) */
-+ void (*init)(struct sock *sk);
-+ /* cleanup private data (optional) */
-+ void (*release)(struct sock *sk);
-+
-+ /* return slow start threshold (required) */
-+ u32 (*ssthresh)(struct sock *sk);
-+ /* do new cwnd calculation (required) */
-+ void (*cong_avoid)(struct sock *sk, u32 ack, u32 acked, u32 in_flight);
-+ /* call before changing ca_state (optional) */
-+ void (*set_state)(struct sock *sk, u8 new_state);
-+ /* call when cwnd event occurs (optional) */
-+ void (*cwnd_event)(struct sock *sk, enum tcp_ca_event ev);
-+ /* new value of cwnd after loss (optional) */
-+ u32 (*undo_cwnd)(struct sock *sk);
-+ /* hook for packet ack accounting (optional) */
-+ void (*pkts_acked)(struct sock *sk, u32 num_acked, s32 rtt_us);
-+ /* get info for inet_diag (optional) */
-+ void (*get_info)(struct sock *sk, u32 ext, struct sk_buff *skb);
-+
-+ char name[TCP_CA_NAME_MAX];
-+ struct module *owner;
-+};
-+
-+int tcp_register_congestion_control(struct tcp_congestion_ops *type);
-+void tcp_unregister_congestion_control(struct tcp_congestion_ops *type);
-+
-+void tcp_init_congestion_control(struct sock *sk);
-+void tcp_cleanup_congestion_control(struct sock *sk);
-+int tcp_set_default_congestion_control(const char *name);
-+void tcp_get_default_congestion_control(char *name);
-+void tcp_get_available_congestion_control(char *buf, size_t len);
-+void tcp_get_allowed_congestion_control(char *buf, size_t len);
-+int tcp_set_allowed_congestion_control(char *allowed);
-+int tcp_set_congestion_control(struct sock *sk, const char *name);
-+int tcp_slow_start(struct tcp_sock *tp, u32 acked);
-+void tcp_cong_avoid_ai(struct tcp_sock *tp, u32 w);
-+
-+extern struct tcp_congestion_ops tcp_init_congestion_ops;
-+u32 tcp_reno_ssthresh(struct sock *sk);
-+void tcp_reno_cong_avoid(struct sock *sk, u32 ack, u32 acked, u32 in_flight);
-+extern struct tcp_congestion_ops tcp_reno;
-+
-+static inline void tcp_set_ca_state(struct sock *sk, const u8 ca_state)
-+{
-+ struct inet_connection_sock *icsk = inet_csk(sk);
-+
-+ if (icsk->icsk_ca_ops->set_state)
-+ icsk->icsk_ca_ops->set_state(sk, ca_state);
-+ icsk->icsk_ca_state = ca_state;
-+}
-+
-+static inline void tcp_ca_event(struct sock *sk, const enum tcp_ca_event event)
-+{
-+ const struct inet_connection_sock *icsk = inet_csk(sk);
-+
-+ if (icsk->icsk_ca_ops->cwnd_event)
-+ icsk->icsk_ca_ops->cwnd_event(sk, event);
-+}
-+
-+/* These functions determine how the current flow behaves in respect of SACK
-+ * handling. SACK is negotiated with the peer, and therefore it can vary
-+ * between different flows.
-+ *
-+ * tcp_is_sack - SACK enabled
-+ * tcp_is_reno - No SACK
-+ * tcp_is_fack - FACK enabled, implies SACK enabled
-+ */
-+static inline int tcp_is_sack(const struct tcp_sock *tp)
-+{
-+ return tp->rx_opt.sack_ok;
-+}
-+
-+static inline bool tcp_is_reno(const struct tcp_sock *tp)
-+{
-+ return !tcp_is_sack(tp);
-+}
-+
-+static inline bool tcp_is_fack(const struct tcp_sock *tp)
-+{
-+ return tp->rx_opt.sack_ok & TCP_FACK_ENABLED;
-+}
-+
-+static inline void tcp_enable_fack(struct tcp_sock *tp)
-+{
-+ tp->rx_opt.sack_ok |= TCP_FACK_ENABLED;
-+}
-+
-+/* TCP early-retransmit (ER) is similar to but more conservative than
-+ * the thin-dupack feature. Enable ER only if thin-dupack is disabled.
-+ */
-+static inline void tcp_enable_early_retrans(struct tcp_sock *tp)
-+{
-+ tp->do_early_retrans = sysctl_tcp_early_retrans &&
-+ sysctl_tcp_early_retrans < 4 && !sysctl_tcp_thin_dupack &&
-+ sysctl_tcp_reordering == 3;
-+}
-+
-+static inline void tcp_disable_early_retrans(struct tcp_sock *tp)
-+{
-+ tp->do_early_retrans = 0;
-+}
-+
-+static inline unsigned int tcp_left_out(const struct tcp_sock *tp)
-+{
-+ return tp->sacked_out + tp->lost_out;
-+}
-+
-+/* This determines how many packets are "in the network" to the best
-+ * of our knowledge. In many cases it is conservative, but where
-+ * detailed information is available from the receiver (via SACK
-+ * blocks etc.) we can make more aggressive calculations.
-+ *
-+ * Use this for decisions involving congestion control, use just
-+ * tp->packets_out to determine if the send queue is empty or not.
-+ *
-+ * Read this equation as:
-+ *
-+ * "Packets sent once on transmission queue" MINUS
-+ * "Packets left network, but not honestly ACKed yet" PLUS
-+ * "Packets fast retransmitted"
-+ */
-+static inline unsigned int tcp_packets_in_flight(const struct tcp_sock *tp)
-+{
-+ return tp->packets_out - tcp_left_out(tp) + tp->retrans_out;
-+}
-+
-+#define TCP_INFINITE_SSTHRESH 0x7fffffff
-+
-+static inline bool tcp_in_initial_slowstart(const struct tcp_sock *tp)
-+{
-+ return tp->snd_ssthresh >= TCP_INFINITE_SSTHRESH;
-+}
-+
-+static inline bool tcp_in_cwnd_reduction(const struct sock *sk)
-+{
-+ return (TCPF_CA_CWR | TCPF_CA_Recovery) &
-+ (1 << inet_csk(sk)->icsk_ca_state);
-+}
-+
-+/* If cwnd > ssthresh, we may raise ssthresh to be half-way to cwnd.
-+ * The exception is cwnd reduction phase, when cwnd is decreasing towards
-+ * ssthresh.
-+ */
-+static inline __u32 tcp_current_ssthresh(const struct sock *sk)
-+{
-+ const struct tcp_sock *tp = tcp_sk(sk);
-+
-+ if (tcp_in_cwnd_reduction(sk))
-+ return tp->snd_ssthresh;
-+ else
-+ return max(tp->snd_ssthresh,
-+ ((tp->snd_cwnd >> 1) +
-+ (tp->snd_cwnd >> 2)));
-+}
-+
-+/* Use define here intentionally to get WARN_ON location shown at the caller */
-+#define tcp_verify_left_out(tp) WARN_ON(tcp_left_out(tp) > tp->packets_out)
-+
-+void tcp_enter_cwr(struct sock *sk, const int set_ssthresh);
-+__u32 tcp_init_cwnd(const struct tcp_sock *tp, const struct dst_entry *dst);
-+
-+/* The maximum number of MSS of available cwnd for which TSO defers
-+ * sending if not using sysctl_tcp_tso_win_divisor.
-+ */
-+static inline __u32 tcp_max_tso_deferred_mss(const struct tcp_sock *tp)
-+{
-+ return 3;
-+}
-+
-+/* Slow start with delack produces 3 packets of burst, so that
-+ * it is safe "de facto". This will be the default - same as
-+ * the default reordering threshold - but if reordering increases,
-+ * we must be able to allow cwnd to burst at least this much in order
-+ * to not pull it back when holes are filled.
-+ */
-+static __inline__ __u32 tcp_max_burst(const struct tcp_sock *tp)
-+{
-+ return tp->reordering;
-+}
-+
-+/* Returns end sequence number of the receiver's advertised window */
-+static inline u32 tcp_wnd_end(const struct tcp_sock *tp)
-+{
-+ return tp->snd_una + tp->snd_wnd;
-+}
-+bool tcp_is_cwnd_limited(const struct sock *sk, u32 in_flight);
-+
-+static inline void tcp_check_probe_timer(struct sock *sk)
-+{
-+ const struct tcp_sock *tp = tcp_sk(sk);
-+ const struct inet_connection_sock *icsk = inet_csk(sk);
-+
-+ if (!tp->packets_out && !icsk->icsk_pending)
-+ inet_csk_reset_xmit_timer(sk, ICSK_TIME_PROBE0,
-+ icsk->icsk_rto, TCP_RTO_MAX);
-+}
-+
-+static inline void tcp_init_wl(struct tcp_sock *tp, u32 seq)
-+{
-+ tp->snd_wl1 = seq;
-+}
-+
-+static inline void tcp_update_wl(struct tcp_sock *tp, u32 seq)
-+{
-+ tp->snd_wl1 = seq;
-+}
-+
-+/*
-+ * Calculate(/check) TCP checksum
-+ */
-+static inline __sum16 tcp_v4_check(int len, __be32 saddr,
-+ __be32 daddr, __wsum base)
-+{
-+ return csum_tcpudp_magic(saddr,daddr,len,IPPROTO_TCP,base);
-+}
-+
-+static inline __sum16 __tcp_checksum_complete(struct sk_buff *skb)
-+{
-+ return __skb_checksum_complete(skb);
-+}
-+
-+static inline bool tcp_checksum_complete(struct sk_buff *skb)
-+{
-+ return !skb_csum_unnecessary(skb) &&
-+ __tcp_checksum_complete(skb);
-+}
-+
-+/* Prequeue for VJ style copy to user, combined with checksumming. */
-+
-+static inline void tcp_prequeue_init(struct tcp_sock *tp)
-+{
-+ tp->ucopy.task = NULL;
-+ tp->ucopy.len = 0;
-+ tp->ucopy.memory = 0;
-+ skb_queue_head_init(&tp->ucopy.prequeue);
-+#ifdef CONFIG_NET_DMA
-+ tp->ucopy.dma_chan = NULL;
-+ tp->ucopy.wakeup = 0;
-+ tp->ucopy.pinned_list = NULL;
-+ tp->ucopy.dma_cookie = 0;
-+#endif
-+}
-+
-+bool tcp_prequeue(struct sock *sk, struct sk_buff *skb);
-+
-+#undef STATE_TRACE
-+
-+#ifdef STATE_TRACE
-+static const char *statename[]={
-+ "Unused","Established","Syn Sent","Syn Recv",
-+ "Fin Wait 1","Fin Wait 2","Time Wait", "Close",
-+ "Close Wait","Last ACK","Listen","Closing"
-+};
-+#endif
-+void tcp_set_state(struct sock *sk, int state);
-+
-+void tcp_done(struct sock *sk);
-+
-+static inline void tcp_sack_reset(struct tcp_options_received *rx_opt)
-+{
-+ rx_opt->dsack = 0;
-+ rx_opt->num_sacks = 0;
-+}
-+
-+u32 tcp_default_init_rwnd(u32 mss);
-+
-+/* Determine a window scaling and initial window to offer. */
-+void tcp_select_initial_window(int __space, __u32 mss, __u32 *rcv_wnd,
-+ __u32 *window_clamp, int wscale_ok,
-+ __u8 *rcv_wscale, __u32 init_rcv_wnd);
-+
-+static inline int tcp_win_from_space(int space)
-+{
-+ return sysctl_tcp_adv_win_scale<=0 ?
-+ (space>>(-sysctl_tcp_adv_win_scale)) :
-+ space - (space>>sysctl_tcp_adv_win_scale);
-+}
-+
-+/* Note: caller must be prepared to deal with negative returns */
-+static inline int tcp_space(const struct sock *sk)
-+{
-+ return tcp_win_from_space(sk->sk_rcvbuf -
-+ atomic_read(&sk->sk_rmem_alloc));
-+}
-+
-+static inline int tcp_full_space(const struct sock *sk)
-+{
-+ return tcp_win_from_space(sk->sk_rcvbuf);
-+}
-+
-+static inline void tcp_openreq_init(struct request_sock *req,
-+ struct tcp_options_received *rx_opt,
-+ struct sk_buff *skb)
-+{
-+ struct inet_request_sock *ireq = inet_rsk(req);
-+
-+ req->rcv_wnd = 0; /* So that tcp_send_synack() knows! */
-+ req->cookie_ts = 0;
-+ tcp_rsk(req)->rcv_isn = TCP_SKB_CB(skb)->seq;
-+ tcp_rsk(req)->rcv_nxt = TCP_SKB_CB(skb)->seq + 1;
-+ tcp_rsk(req)->snt_synack = 0;
-+ req->mss = rx_opt->mss_clamp;
-+ req->ts_recent = rx_opt->saw_tstamp ? rx_opt->rcv_tsval : 0;
-+ ireq->tstamp_ok = rx_opt->tstamp_ok;
-+ ireq->sack_ok = rx_opt->sack_ok;
-+ ireq->snd_wscale = rx_opt->snd_wscale;
-+ ireq->wscale_ok = rx_opt->wscale_ok;
-+ ireq->acked = 0;
-+ ireq->ecn_ok = 0;
-+ ireq->ir_rmt_port = tcp_hdr(skb)->source;
-+ ireq->ir_num = ntohs(tcp_hdr(skb)->dest);
-+}
-+
-+void tcp_enter_memory_pressure(struct sock *sk);
-+
-+static inline int keepalive_intvl_when(const struct tcp_sock *tp)
-+{
-+ return tp->keepalive_intvl ? : sysctl_tcp_keepalive_intvl;
-+}
-+
-+static inline int keepalive_time_when(const struct tcp_sock *tp)
-+{
-+ return tp->keepalive_time ? : sysctl_tcp_keepalive_time;
-+}
-+
-+static inline int keepalive_probes(const struct tcp_sock *tp)
-+{
-+ return tp->keepalive_probes ? : sysctl_tcp_keepalive_probes;
-+}
-+
-+static inline u32 keepalive_time_elapsed(const struct tcp_sock *tp)
-+{
-+ const struct inet_connection_sock *icsk = &tp->inet_conn;
-+
-+ return min_t(u32, tcp_time_stamp - icsk->icsk_ack.lrcvtime,
-+ tcp_time_stamp - tp->rcv_tstamp);
-+}
-+
-+static inline int tcp_fin_time(const struct sock *sk)
-+{
-+ int fin_timeout = tcp_sk(sk)->linger2 ? : sysctl_tcp_fin_timeout;
-+ const int rto = inet_csk(sk)->icsk_rto;
-+
-+ if (fin_timeout < (rto << 2) - (rto >> 1))
-+ fin_timeout = (rto << 2) - (rto >> 1);
-+
-+ return fin_timeout;
-+}
-+
-+static inline bool tcp_paws_check(const struct tcp_options_received *rx_opt,
-+ int paws_win)
-+{
-+ if ((s32)(rx_opt->ts_recent - rx_opt->rcv_tsval) <= paws_win)
-+ return true;
-+ if (unlikely(get_seconds() >= rx_opt->ts_recent_stamp + TCP_PAWS_24DAYS))
-+ return true;
-+ /*
-+ * Some OSes send SYN and SYNACK messages with tsval=0 tsecr=0,
-+ * then following tcp messages have valid values. Ignore 0 value,
-+ * or else 'negative' tsval might forbid us to accept their packets.
-+ */
-+ if (!rx_opt->ts_recent)
-+ return true;
-+ return false;
-+}
-+
-+static inline bool tcp_paws_reject(const struct tcp_options_received *rx_opt,
-+ int rst)
-+{
-+ if (tcp_paws_check(rx_opt, 0))
-+ return false;
-+
-+ /* RST segments are not recommended to carry timestamp,
-+ and, if they do, it is recommended to ignore PAWS because
-+ "their cleanup function should take precedence over timestamps."
-+ Certainly, it is mistake. It is necessary to understand the reasons
-+ of this constraint to relax it: if peer reboots, clock may go
-+ out-of-sync and half-open connections will not be reset.
-+ Actually, the problem would be not existing if all
-+ the implementations followed draft about maintaining clock
-+ via reboots. Linux-2.2 DOES NOT!
-+
-+ However, we can relax time bounds for RST segments to MSL.
-+ */
-+ if (rst && get_seconds() >= rx_opt->ts_recent_stamp + TCP_PAWS_MSL)
-+ return false;
-+ return true;
-+}
-+
-+static inline void tcp_mib_init(struct net *net)
-+{
-+ /* See RFC 2012 */
-+ TCP_ADD_STATS_USER(net, TCP_MIB_RTOALGORITHM, 1);
-+ TCP_ADD_STATS_USER(net, TCP_MIB_RTOMIN, TCP_RTO_MIN*1000/HZ);
-+ TCP_ADD_STATS_USER(net, TCP_MIB_RTOMAX, TCP_RTO_MAX*1000/HZ);
-+ TCP_ADD_STATS_USER(net, TCP_MIB_MAXCONN, -1);
-+}
-+
-+/* from STCP */
-+static inline void tcp_clear_retrans_hints_partial(struct tcp_sock *tp)
-+{
-+ tp->lost_skb_hint = NULL;
-+}
-+
-+static inline void tcp_clear_all_retrans_hints(struct tcp_sock *tp)
-+{
-+ tcp_clear_retrans_hints_partial(tp);
-+ tp->retransmit_skb_hint = NULL;
-+}
-+
-+/* MD5 Signature */
-+struct crypto_hash;
-+
-+union tcp_md5_addr {
-+ struct in_addr a4;
-+#if IS_ENABLED(CONFIG_IPV6)
-+ struct in6_addr a6;
-+#endif
-+};
-+
-+/* - key database */
-+struct tcp_md5sig_key {
-+ struct hlist_node node;
-+ u8 keylen;
-+ u8 family; /* AF_INET or AF_INET6 */
-+ union tcp_md5_addr addr;
-+ u8 key[TCP_MD5SIG_MAXKEYLEN];
-+ struct rcu_head rcu;
-+};
-+
-+/* - sock block */
-+struct tcp_md5sig_info {
-+ struct hlist_head head;
-+ struct rcu_head rcu;
-+};
-+
-+/* - pseudo header */
-+struct tcp4_pseudohdr {
-+ __be32 saddr;
-+ __be32 daddr;
-+ __u8 pad;
-+ __u8 protocol;
-+ __be16 len;
-+};
-+
-+struct tcp6_pseudohdr {
-+ struct in6_addr saddr;
-+ struct in6_addr daddr;
-+ __be32 len;
-+ __be32 protocol; /* including padding */
-+};
-+
-+union tcp_md5sum_block {
-+ struct tcp4_pseudohdr ip4;
-+#if IS_ENABLED(CONFIG_IPV6)
-+ struct tcp6_pseudohdr ip6;
-+#endif
-+};
-+
-+/* - pool: digest algorithm, hash description and scratch buffer */
-+struct tcp_md5sig_pool {
-+ struct hash_desc md5_desc;
-+ union tcp_md5sum_block md5_blk;
-+};
-+
-+/* - functions */
-+int tcp_v4_md5_hash_skb(char *md5_hash, struct tcp_md5sig_key *key,
-+ const struct sock *sk, const struct request_sock *req,
-+ const struct sk_buff *skb);
-+int tcp_md5_do_add(struct sock *sk, const union tcp_md5_addr *addr,
-+ int family, const u8 *newkey, u8 newkeylen, gfp_t gfp);
-+int tcp_md5_do_del(struct sock *sk, const union tcp_md5_addr *addr,
-+ int family);
-+struct tcp_md5sig_key *tcp_v4_md5_lookup(struct sock *sk,
-+ struct sock *addr_sk);
-+
-+#ifdef CONFIG_TCP_MD5SIG
-+struct tcp_md5sig_key *tcp_md5_do_lookup(struct sock *sk,
-+ const union tcp_md5_addr *addr,
-+ int family);
-+#define tcp_twsk_md5_key(twsk) ((twsk)->tw_md5_key)
-+#else
-+static inline struct tcp_md5sig_key *tcp_md5_do_lookup(struct sock *sk,
-+ const union tcp_md5_addr *addr,
-+ int family)
-+{
-+ return NULL;
-+}
-+#define tcp_twsk_md5_key(twsk) NULL
-+#endif
-+
-+bool tcp_alloc_md5sig_pool(void);
-+
-+struct tcp_md5sig_pool *tcp_get_md5sig_pool(void);
-+static inline void tcp_put_md5sig_pool(void)
-+{
-+ local_bh_enable();
-+}
-+
-+int tcp_md5_hash_header(struct tcp_md5sig_pool *, const struct tcphdr *);
-+int tcp_md5_hash_skb_data(struct tcp_md5sig_pool *, const struct sk_buff *,
-+ unsigned int header_len);
-+int tcp_md5_hash_key(struct tcp_md5sig_pool *hp,
-+ const struct tcp_md5sig_key *key);
-+
-+/* From tcp_fastopen.c */
-+void tcp_fastopen_cache_get(struct sock *sk, u16 *mss,
-+ struct tcp_fastopen_cookie *cookie, int *syn_loss,
-+ unsigned long *last_syn_loss);
-+void tcp_fastopen_cache_set(struct sock *sk, u16 mss,
-+ struct tcp_fastopen_cookie *cookie, bool syn_lost);
-+struct tcp_fastopen_request {
-+ /* Fast Open cookie. Size 0 means a cookie request */
-+ struct tcp_fastopen_cookie cookie;
-+ struct msghdr *data; /* data in MSG_FASTOPEN */
-+ size_t size;
-+ int copied; /* queued in tcp_connect() */
-+};
-+void tcp_free_fastopen_req(struct tcp_sock *tp);
-+
-+extern struct tcp_fastopen_context __rcu *tcp_fastopen_ctx;
-+int tcp_fastopen_reset_cipher(void *key, unsigned int len);
-+void tcp_fastopen_cookie_gen(__be32 src, __be32 dst,
-+ struct tcp_fastopen_cookie *foc);
-+void tcp_fastopen_init_key_once(bool publish);
-+#define TCP_FASTOPEN_KEY_LENGTH 16
-+
-+/* Fastopen key context */
-+struct tcp_fastopen_context {
-+ struct crypto_cipher *tfm;
-+ __u8 key[TCP_FASTOPEN_KEY_LENGTH];
-+ struct rcu_head rcu;
-+};
-+
-+/* write queue abstraction */
-+static inline void tcp_write_queue_purge(struct sock *sk)
-+{
-+ struct sk_buff *skb;
-+
-+ while ((skb = __skb_dequeue(&sk->sk_write_queue)) != NULL)
-+ sk_wmem_free_skb(sk, skb);
-+ sk_mem_reclaim(sk);
-+ tcp_clear_all_retrans_hints(tcp_sk(sk));
-+}
-+
-+static inline struct sk_buff *tcp_write_queue_head(const struct sock *sk)
-+{
-+ return skb_peek(&sk->sk_write_queue);
-+}
-+
-+static inline struct sk_buff *tcp_write_queue_tail(const struct sock *sk)
-+{
-+ return skb_peek_tail(&sk->sk_write_queue);
-+}
-+
-+static inline struct sk_buff *tcp_write_queue_next(const struct sock *sk,
-+ const struct sk_buff *skb)
-+{
-+ return skb_queue_next(&sk->sk_write_queue, skb);
-+}
-+
-+static inline struct sk_buff *tcp_write_queue_prev(const struct sock *sk,
-+ const struct sk_buff *skb)
-+{
-+ return skb_queue_prev(&sk->sk_write_queue, skb);
-+}
-+
-+#define tcp_for_write_queue(skb, sk) \
-+ skb_queue_walk(&(sk)->sk_write_queue, skb)
-+
-+#define tcp_for_write_queue_from(skb, sk) \
-+ skb_queue_walk_from(&(sk)->sk_write_queue, skb)
-+
-+#define tcp_for_write_queue_from_safe(skb, tmp, sk) \
-+ skb_queue_walk_from_safe(&(sk)->sk_write_queue, skb, tmp)
-+
-+static inline struct sk_buff *tcp_send_head(const struct sock *sk)
-+{
-+ return sk->sk_send_head;
-+}
-+
-+static inline bool tcp_skb_is_last(const struct sock *sk,
-+ const struct sk_buff *skb)
-+{
-+ return skb_queue_is_last(&sk->sk_write_queue, skb);
-+}
-+
-+static inline void tcp_advance_send_head(struct sock *sk, const struct sk_buff *skb)
-+{
-+ if (tcp_skb_is_last(sk, skb))
-+ sk->sk_send_head = NULL;
-+ else
-+ sk->sk_send_head = tcp_write_queue_next(sk, skb);
-+}
-+
-+static inline void tcp_check_send_head(struct sock *sk, struct sk_buff *skb_unlinked)
-+{
-+ if (sk->sk_send_head == skb_unlinked)
-+ sk->sk_send_head = NULL;
-+}
-+
-+static inline void tcp_init_send_head(struct sock *sk)
-+{
-+ sk->sk_send_head = NULL;
-+}
-+
-+static inline void __tcp_add_write_queue_tail(struct sock *sk, struct sk_buff *skb)
-+{
-+ __skb_queue_tail(&sk->sk_write_queue, skb);
-+}
-+
-+static inline void tcp_add_write_queue_tail(struct sock *sk, struct sk_buff *skb)
-+{
-+ __tcp_add_write_queue_tail(sk, skb);
-+
-+ /* Queue it, remembering where we must start sending. */
-+ if (sk->sk_send_head == NULL) {
-+ sk->sk_send_head = skb;
-+
-+ if (tcp_sk(sk)->highest_sack == NULL)
-+ tcp_sk(sk)->highest_sack = skb;
-+ }
-+}
-+
-+static inline void __tcp_add_write_queue_head(struct sock *sk, struct sk_buff *skb)
-+{
-+ __skb_queue_head(&sk->sk_write_queue, skb);
-+}
-+
-+/* Insert buff after skb on the write queue of sk. */
-+static inline void tcp_insert_write_queue_after(struct sk_buff *skb,
-+ struct sk_buff *buff,
-+ struct sock *sk)
-+{
-+ __skb_queue_after(&sk->sk_write_queue, skb, buff);
-+}
-+
-+/* Insert new before skb on the write queue of sk. */
-+static inline void tcp_insert_write_queue_before(struct sk_buff *new,
-+ struct sk_buff *skb,
-+ struct sock *sk)
-+{
-+ __skb_queue_before(&sk->sk_write_queue, skb, new);
-+
-+ if (sk->sk_send_head == skb)
-+ sk->sk_send_head = new;
-+}
-+
-+static inline void tcp_unlink_write_queue(struct sk_buff *skb, struct sock *sk)
-+{
-+ __skb_unlink(skb, &sk->sk_write_queue);
-+}
-+
-+static inline bool tcp_write_queue_empty(struct sock *sk)
-+{
-+ return skb_queue_empty(&sk->sk_write_queue);
-+}
-+
-+static inline void tcp_push_pending_frames(struct sock *sk)
-+{
-+ if (tcp_send_head(sk)) {
-+ struct tcp_sock *tp = tcp_sk(sk);
-+
-+ __tcp_push_pending_frames(sk, tcp_current_mss(sk), tp->nonagle);
-+ }
-+}
-+
-+/* Start sequence of the skb just after the highest skb with SACKed
-+ * bit, valid only if sacked_out > 0 or when the caller has ensured
-+ * validity by itself.
-+ */
-+static inline u32 tcp_highest_sack_seq(struct tcp_sock *tp)
-+{
-+ if (!tp->sacked_out)
-+ return tp->snd_una;
-+
-+ if (tp->highest_sack == NULL)
-+ return tp->snd_nxt;
-+
-+ return TCP_SKB_CB(tp->highest_sack)->seq;
-+}
-+
-+static inline void tcp_advance_highest_sack(struct sock *sk, struct sk_buff *skb)
-+{
-+ tcp_sk(sk)->highest_sack = tcp_skb_is_last(sk, skb) ? NULL :
-+ tcp_write_queue_next(sk, skb);
-+}
-+
-+static inline struct sk_buff *tcp_highest_sack(struct sock *sk)
-+{
-+ return tcp_sk(sk)->highest_sack;
-+}
-+
-+static inline void tcp_highest_sack_reset(struct sock *sk)
-+{
-+ tcp_sk(sk)->highest_sack = tcp_write_queue_head(sk);
-+}
-+
-+/* Called when old skb is about to be deleted (to be combined with new skb) */
-+static inline void tcp_highest_sack_combine(struct sock *sk,
-+ struct sk_buff *old,
-+ struct sk_buff *new)
-+{
-+ if (tcp_sk(sk)->sacked_out && (old == tcp_sk(sk)->highest_sack))
-+ tcp_sk(sk)->highest_sack = new;
-+}
-+
-+/* Determines whether this is a thin stream (which may suffer from
-+ * increased latency). Used to trigger latency-reducing mechanisms.
-+ */
-+static inline bool tcp_stream_is_thin(struct tcp_sock *tp)
-+{
-+ return tp->packets_out < 4 && !tcp_in_initial_slowstart(tp);
-+}
-+
-+/* /proc */
-+enum tcp_seq_states {
-+ TCP_SEQ_STATE_LISTENING,
-+ TCP_SEQ_STATE_OPENREQ,
-+ TCP_SEQ_STATE_ESTABLISHED,
-+};
-+
-+int tcp_seq_open(struct inode *inode, struct file *file);
-+
-+struct tcp_seq_afinfo {
-+ char *name;
-+ sa_family_t family;
-+ const struct file_operations *seq_fops;
-+ struct seq_operations seq_ops;
-+};
-+
-+struct tcp_iter_state {
-+ struct seq_net_private p;
-+ sa_family_t family;
-+ enum tcp_seq_states state;
-+ struct sock *syn_wait_sk;
-+ int bucket, offset, sbucket, num;
-+ kuid_t uid;
-+ loff_t last_pos;
-+};
-+
-+int tcp_proc_register(struct net *net, struct tcp_seq_afinfo *afinfo);
-+void tcp_proc_unregister(struct net *net, struct tcp_seq_afinfo *afinfo);
-+
-+extern struct request_sock_ops tcp_request_sock_ops;
-+extern struct request_sock_ops tcp6_request_sock_ops;
-+
-+void tcp_v4_destroy_sock(struct sock *sk);
-+
-+struct sk_buff *tcp_gso_segment(struct sk_buff *skb,
-+ netdev_features_t features);
-+struct sk_buff **tcp_gro_receive(struct sk_buff **head, struct sk_buff *skb);
-+int tcp_gro_complete(struct sk_buff *skb);
-+
-+void __tcp_v4_send_check(struct sk_buff *skb, __be32 saddr, __be32 daddr);
-+
-+static inline u32 tcp_notsent_lowat(const struct tcp_sock *tp)
-+{
-+ return tp->notsent_lowat ?: sysctl_tcp_notsent_lowat;
-+}
-+
-+static inline bool tcp_stream_memory_free(const struct sock *sk)
-+{
-+ const struct tcp_sock *tp = tcp_sk(sk);
-+ u32 notsent_bytes = tp->write_seq - tp->snd_nxt;
-+
-+ return notsent_bytes < tcp_notsent_lowat(tp);
-+}
-+
-+#ifdef CONFIG_PROC_FS
-+int tcp4_proc_init(void);
-+void tcp4_proc_exit(void);
-+#endif
-+
-+/* TCP af-specific functions */
-+struct tcp_sock_af_ops {
-+#ifdef CONFIG_TCP_MD5SIG
-+ struct tcp_md5sig_key *(*md5_lookup) (struct sock *sk,
-+ struct sock *addr_sk);
-+ int (*calc_md5_hash) (char *location,
-+ struct tcp_md5sig_key *md5,
-+ const struct sock *sk,
-+ const struct request_sock *req,
-+ const struct sk_buff *skb);
-+ int (*md5_parse) (struct sock *sk,
-+ char __user *optval,
-+ int optlen);
-+#endif
-+};
-+
-+struct tcp_request_sock_ops {
-+#ifdef CONFIG_TCP_MD5SIG
-+ struct tcp_md5sig_key *(*md5_lookup) (struct sock *sk,
-+ struct request_sock *req);
-+ int (*calc_md5_hash) (char *location,
-+ struct tcp_md5sig_key *md5,
-+ const struct sock *sk,
-+ const struct request_sock *req,
-+ const struct sk_buff *skb);
-+#endif
-+};
-+
-+int tcpv4_offload_init(void);
-+
-+void tcp_v4_init(void);
-+void tcp_init(void);
-+
-+#endif /* _TCP_H */
-diff -Nur linux-3.15-rc7.orig/net/core/request_sock.c linux-3.15-rc7/net/core/request_sock.c
---- linux-3.15-rc7.orig/net/core/request_sock.c 2014-05-26 01:06:00.000000000 +0200
-+++ linux-3.15-rc7/net/core/request_sock.c 2014-05-31 22:42:49.028605326 +0200
+diff -Nur linux-3.15.1.orig/net/core/request_sock.c linux-3.15.1/net/core/request_sock.c
+--- linux-3.15.1.orig/net/core/request_sock.c 2014-06-16 22:44:27.000000000 +0200
++++ linux-3.15.1/net/core/request_sock.c 2014-06-28 10:10:20.624857911 +0200
@@ -131,6 +131,7 @@
kfree(lopt);
}
@@ -1699,237 +95,9 @@ diff -Nur linux-3.15-rc7.orig/net/core/request_sock.c linux-3.15-rc7/net/core/re
sock_put(lsk);
}
+#endif
-diff -Nur linux-3.15-rc7.orig/net/core/request_sock.c.orig linux-3.15-rc7/net/core/request_sock.c.orig
---- linux-3.15-rc7.orig/net/core/request_sock.c.orig 1970-01-01 01:00:00.000000000 +0100
-+++ linux-3.15-rc7/net/core/request_sock.c.orig 2014-05-26 01:06:00.000000000 +0200
-@@ -0,0 +1,224 @@
-+/*
-+ * NET Generic infrastructure for Network protocols.
-+ *
-+ * Authors: Arnaldo Carvalho de Melo <acme@conectiva.com.br>
-+ *
-+ * From code originally in include/net/tcp.h
-+ *
-+ * This program is free software; you can redistribute it and/or
-+ * modify it under the terms of the GNU General Public License
-+ * as published by the Free Software Foundation; either version
-+ * 2 of the License, or (at your option) any later version.
-+ */
-+
-+#include <linux/module.h>
-+#include <linux/random.h>
-+#include <linux/slab.h>
-+#include <linux/string.h>
-+#include <linux/tcp.h>
-+#include <linux/vmalloc.h>
-+
-+#include <net/request_sock.h>
-+
-+/*
-+ * Maximum number of SYN_RECV sockets in queue per LISTEN socket.
-+ * One SYN_RECV socket costs about 80bytes on a 32bit machine.
-+ * It would be better to replace it with a global counter for all sockets
-+ * but then some measure against one socket starving all other sockets
-+ * would be needed.
-+ *
-+ * The minimum value of it is 128. Experiments with real servers show that
-+ * it is absolutely not enough even at 100conn/sec. 256 cures most
-+ * of problems.
-+ * This value is adjusted to 128 for low memory machines,
-+ * and it will increase in proportion to the memory of machine.
-+ * Note : Dont forget somaxconn that may limit backlog too.
-+ */
-+int sysctl_max_syn_backlog = 256;
-+EXPORT_SYMBOL(sysctl_max_syn_backlog);
-+
-+int reqsk_queue_alloc(struct request_sock_queue *queue,
-+ unsigned int nr_table_entries)
-+{
-+ size_t lopt_size = sizeof(struct listen_sock);
-+ struct listen_sock *lopt;
-+
-+ nr_table_entries = min_t(u32, nr_table_entries, sysctl_max_syn_backlog);
-+ nr_table_entries = max_t(u32, nr_table_entries, 8);
-+ nr_table_entries = roundup_pow_of_two(nr_table_entries + 1);
-+ lopt_size += nr_table_entries * sizeof(struct request_sock *);
-+ if (lopt_size > PAGE_SIZE)
-+ lopt = vzalloc(lopt_size);
-+ else
-+ lopt = kzalloc(lopt_size, GFP_KERNEL);
-+ if (lopt == NULL)
-+ return -ENOMEM;
-+
-+ for (lopt->max_qlen_log = 3;
-+ (1 << lopt->max_qlen_log) < nr_table_entries;
-+ lopt->max_qlen_log++);
-+
-+ get_random_bytes(&lopt->hash_rnd, sizeof(lopt->hash_rnd));
-+ rwlock_init(&queue->syn_wait_lock);
-+ queue->rskq_accept_head = NULL;
-+ lopt->nr_table_entries = nr_table_entries;
-+
-+ write_lock_bh(&queue->syn_wait_lock);
-+ queue->listen_opt = lopt;
-+ write_unlock_bh(&queue->syn_wait_lock);
-+
-+ return 0;
-+}
-+
-+void __reqsk_queue_destroy(struct request_sock_queue *queue)
-+{
-+ struct listen_sock *lopt;
-+ size_t lopt_size;
-+
-+ /*
-+ * this is an error recovery path only
-+ * no locking needed and the lopt is not NULL
-+ */
-+
-+ lopt = queue->listen_opt;
-+ lopt_size = sizeof(struct listen_sock) +
-+ lopt->nr_table_entries * sizeof(struct request_sock *);
-+
-+ if (lopt_size > PAGE_SIZE)
-+ vfree(lopt);
-+ else
-+ kfree(lopt);
-+}
-+
-+static inline struct listen_sock *reqsk_queue_yank_listen_sk(
-+ struct request_sock_queue *queue)
-+{
-+ struct listen_sock *lopt;
-+
-+ write_lock_bh(&queue->syn_wait_lock);
-+ lopt = queue->listen_opt;
-+ queue->listen_opt = NULL;
-+ write_unlock_bh(&queue->syn_wait_lock);
-+
-+ return lopt;
-+}
-+
-+void reqsk_queue_destroy(struct request_sock_queue *queue)
-+{
-+ /* make all the listen_opt local to us */
-+ struct listen_sock *lopt = reqsk_queue_yank_listen_sk(queue);
-+ size_t lopt_size = sizeof(struct listen_sock) +
-+ lopt->nr_table_entries * sizeof(struct request_sock *);
-+
-+ if (lopt->qlen != 0) {
-+ unsigned int i;
-+
-+ for (i = 0; i < lopt->nr_table_entries; i++) {
-+ struct request_sock *req;
-+
-+ while ((req = lopt->syn_table[i]) != NULL) {
-+ lopt->syn_table[i] = req->dl_next;
-+ lopt->qlen--;
-+ reqsk_free(req);
-+ }
-+ }
-+ }
-+
-+ WARN_ON(lopt->qlen != 0);
-+ if (lopt_size > PAGE_SIZE)
-+ vfree(lopt);
-+ else
-+ kfree(lopt);
-+}
-+
-+/*
-+ * This function is called to set a Fast Open socket's "fastopen_rsk" field
-+ * to NULL when a TFO socket no longer needs to access the request_sock.
-+ * This happens only after 3WHS has been either completed or aborted (e.g.,
-+ * RST is received).
-+ *
-+ * Before TFO, a child socket is created only after 3WHS is completed,
-+ * hence it never needs to access the request_sock. things get a lot more
-+ * complex with TFO. A child socket, accepted or not, has to access its
-+ * request_sock for 3WHS processing, e.g., to retransmit SYN-ACK pkts,
-+ * until 3WHS is either completed or aborted. Afterwards the req will stay
-+ * until either the child socket is accepted, or in the rare case when the
-+ * listener is closed before the child is accepted.
-+ *
-+ * In short, a request socket is only freed after BOTH 3WHS has completed
-+ * (or aborted) and the child socket has been accepted (or listener closed).
-+ * When a child socket is accepted, its corresponding req->sk is set to
-+ * NULL since it's no longer needed. More importantly, "req->sk == NULL"
-+ * will be used by the code below to determine if a child socket has been
-+ * accepted or not, and the check is protected by the fastopenq->lock
-+ * described below.
-+ *
-+ * Note that fastopen_rsk is only accessed from the child socket's context
-+ * with its socket lock held. But a request_sock (req) can be accessed by
-+ * both its child socket through fastopen_rsk, and a listener socket through
-+ * icsk_accept_queue.rskq_accept_head. To protect the access a simple spin
-+ * lock per listener "icsk->icsk_accept_queue.fastopenq->lock" is created.
-+ * only in the rare case when both the listener and the child locks are held,
-+ * e.g., in inet_csk_listen_stop() do we not need to acquire the lock.
-+ * The lock also protects other fields such as fastopenq->qlen, which is
-+ * decremented by this function when fastopen_rsk is no longer needed.
-+ *
-+ * Note that another solution was to simply use the existing socket lock
-+ * from the listener. But first socket lock is difficult to use. It is not
-+ * a simple spin lock - one must consider sock_owned_by_user() and arrange
-+ * to use sk_add_backlog() stuff. But what really makes it infeasible is the
-+ * locking hierarchy violation. E.g., inet_csk_listen_stop() may try to
-+ * acquire a child's lock while holding listener's socket lock. A corner
-+ * case might also exist in tcp_v4_hnd_req() that will trigger this locking
-+ * order.
-+ *
-+ * When a TFO req is created, it needs to sock_hold its listener to prevent
-+ * the latter data structure from going away.
-+ *
-+ * This function also sets "treq->listener" to NULL and unreference listener
-+ * socket. treq->listener is used by the listener so it is protected by the
-+ * fastopenq->lock in this function.
-+ */
-+void reqsk_fastopen_remove(struct sock *sk, struct request_sock *req,
-+ bool reset)
-+{
-+ struct sock *lsk = tcp_rsk(req)->listener;
-+ struct fastopen_queue *fastopenq =
-+ inet_csk(lsk)->icsk_accept_queue.fastopenq;
-+
-+ tcp_sk(sk)->fastopen_rsk = NULL;
-+ spin_lock_bh(&fastopenq->lock);
-+ fastopenq->qlen--;
-+ tcp_rsk(req)->listener = NULL;
-+ if (req->sk) /* the child socket hasn't been accepted yet */
-+ goto out;
-+
-+ if (!reset || lsk->sk_state != TCP_LISTEN) {
-+ /* If the listener has been closed don't bother with the
-+ * special RST handling below.
-+ */
-+ spin_unlock_bh(&fastopenq->lock);
-+ sock_put(lsk);
-+ reqsk_free(req);
-+ return;
-+ }
-+ /* Wait for 60secs before removing a req that has triggered RST.
-+ * This is a simple defense against TFO spoofing attack - by
-+ * counting the req against fastopen.max_qlen, and disabling
-+ * TFO when the qlen exceeds max_qlen.
-+ *
-+ * For more details see CoNext'11 "TCP Fast Open" paper.
-+ */
-+ req->expires = jiffies + 60*HZ;
-+ if (fastopenq->rskq_rst_head == NULL)
-+ fastopenq->rskq_rst_head = req;
-+ else
-+ fastopenq->rskq_rst_tail->dl_next = req;
-+
-+ req->dl_next = NULL;
-+ fastopenq->rskq_rst_tail = req;
-+ fastopenq->qlen++;
-+out:
-+ spin_unlock_bh(&fastopenq->lock);
-+ sock_put(lsk);
-+}
-diff -Nur linux-3.15-rc7.orig/net/ipv4/Kconfig linux-3.15-rc7/net/ipv4/Kconfig
---- linux-3.15-rc7.orig/net/ipv4/Kconfig 2014-05-26 01:06:00.000000000 +0200
-+++ linux-3.15-rc7/net/ipv4/Kconfig 2014-05-31 22:42:49.028605326 +0200
+diff -Nur linux-3.15.1.orig/net/ipv4/Kconfig linux-3.15.1/net/ipv4/Kconfig
+--- linux-3.15.1.orig/net/ipv4/Kconfig 2014-06-16 22:44:27.000000000 +0200
++++ linux-3.15.1/net/ipv4/Kconfig 2014-06-28 10:10:20.624857911 +0200
@@ -307,6 +307,10 @@
the notion of a secure tunnel for IPSEC and then use routing protocol
on top.
@@ -1941,9 +109,9 @@ diff -Nur linux-3.15-rc7.orig/net/ipv4/Kconfig linux-3.15-rc7/net/ipv4/Kconfig
config INET_AH
tristate "IP: AH transformation"
select XFRM_ALGO
-diff -Nur linux-3.15-rc7.orig/net/ipv4/Makefile linux-3.15-rc7/net/ipv4/Makefile
---- linux-3.15-rc7.orig/net/ipv4/Makefile 2014-05-26 01:06:00.000000000 +0200
-+++ linux-3.15-rc7/net/ipv4/Makefile 2014-05-31 22:42:49.028605326 +0200
+diff -Nur linux-3.15.1.orig/net/ipv4/Makefile linux-3.15.1/net/ipv4/Makefile
+--- linux-3.15.1.orig/net