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authorWaldemar Brodkorb <wbx@openadk.org>2015-08-03 13:45:08 +0200
committerWaldemar Brodkorb <wbx@openadk.org>2015-08-03 14:13:17 +0200
commitc6a72670b54e13d3ab3a6056d7c4f4c503cf0d78 (patch)
tree51c776165e7abb4f1336a93edc519461786496fe /scripts
parent6debfdc194f5192706120783d133fbb99271eccc (diff)
rework kernel module infrastructure
Instead of maintaining mk/modules.mk which defines compilations of related kernel modules to pack together into a single package, follow an automatic approach: For every kernel module found in the modules installation directory, create a single package. There are a few caveats to cover: === Module Loading Order === Upon bootup, module loading is ordered based on the number-prefixed files in /etc/modules.d/. The correct number was previously managed in mk/modules.mk on a per-collection basis. The new approach is to have levels which modules are to be assigned to. Level 0 contains modules with no dependencies at all. Level 1 contains modules which have only level 0 dependencies, and so on. This information is determined at compile-time by make-module-ipkgs.sh. === Module Installation to Target RootFS === Since module packages are created automatically from the modules the script finds, ADK build system has no knowledge about the connection between what the user has selected in menuconfig and the actual module packages. Therefore the earlier approach to install selected packages into rootfs does not hold anymore. Instead, use wildcards to find all packages in firmware directory prefixed by 'kmod-' and install them all (hopefully doing the right thing). === Kernel Version === KERNEL_VERSION now contains KERNEL_RELEASE already By creating a localversion file, make KERNEL_RELEASE part of the kernel's version number (so KERNEL_VERSION is correct in most situations) Signed-off-by: Phil Sutter <phil@nwl.cc>
Diffstat (limited to 'scripts')
-rw-r--r--scripts/make-module-ipkgs.sh100
1 files changed, 100 insertions, 0 deletions
diff --git a/scripts/make-module-ipkgs.sh b/scripts/make-module-ipkgs.sh
new file mode 100644
index 000000000..3ab0dc787
--- /dev/null
+++ b/scripts/make-module-ipkgs.sh
@@ -0,0 +1,100 @@
+#!/usr/bin/env bash
+#
+# make-module-ipkgs.sh - scan through modules directory and create a package
+# for each of them automatically.
+#
+# Copyright (C) 2015 - Phil Sutter <phil@nwl.cc>
+#
+# 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 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+#
+# Usage:
+# $0 <ARCH> <KERNEL_VERSION> <LINUX_BUILD_DIR> <pkg-build-cmd> <PACKAGE_DIR>
+
+ARCH="$1"
+VER="$2"
+BUILD_DIR="$3"
+PKG_BUILD="$4"
+PACKAGE_DIR="$5"
+
+declare -A modpaths moddeps modlevels
+
+# recursively find a level for given module which is high enough so all
+# dependencies are in a lower level
+find_modlevel() { # (modname)
+ local level=0
+ for dep in ${moddeps[$1]}; do
+ [[ -n "${modlevels[$dep]}" ]] || find_modlevel $dep
+ [[ ${modlevels[$dep]} -lt $level ]] || level=$((modlevels[$dep] + 1))
+ done
+ modlevels[$1]=$level
+}
+
+# sanitize modname, ipkg does not allow uppercase or underscores
+pkgname() { # (modname)
+ tr 'A-Z_' 'a-z-' <<< "kmod-$1"
+}
+
+for modpath in $(find ${BUILD_DIR}/modules -name \*.ko | xargs); do
+ modname="$(basename $modpath .ko)"
+ moddep="$(modinfo $modpath | awk '/^depends:/{print $2}' | sed 's/,/ /g')"
+ modpaths[$modname]="$modpath"
+ moddeps[$modname]="$moddep"
+done
+
+#echo "modpaths:"
+#for modname in ${!modpaths[@]}; do
+# echo "$modname: ${modpaths[$modname]}"
+#done
+#echo
+#echo "moddeps:"
+#for modname in ${!moddeps[@]}; do
+# echo "$modname: ${moddeps[$modname]}"
+#done
+#echo
+
+for modname in ${!modpaths[@]}; do
+ find_modlevel $modname
+
+ ctrlfile=${BUILD_DIR}/kmod-control/kmod-${modname}.control
+ ipkgdir=${BUILD_DIR}/linux-modules/ipkg/$modname
+
+ cat >$ctrlfile <<-EOF
+ Package: $(pkgname $modname)
+ Priority: optional
+ Section: sys
+ Description: kernel module $modname
+ EOF
+ sh $(dirname $0)/make-ipkg-dir.sh $ipkgdir $ctrlfile $VER $ARCH
+
+ moddep="$(modinfo $modpath | awk '/^depends:/{print $2}' | sed 's/,/ /g')"
+ depline="kernel ($VER)"
+ for m in ${moddeps[$modname]}; do
+ depline+=", $(pkgname ${m})"
+ done
+ echo "Depends: $depline" >>${ipkgdir}/CONTROL/control
+ mkdir -p ${ipkgdir}/lib/modules/${VER}
+ cp ${modpaths[$modname]} ${ipkgdir}/lib/modules/${VER}
+ cat >${ipkgdir}/CONTROL/postinst <<EOF
+#!/bin/sh
+if [ -z \${IPKG_INSTROOT} ]; then
+ . /etc/functions.sh
+ load_modules /etc/modules.d/${modlevels[$modname]}-$modname
+fi
+EOF
+ chmod 0755 ${ipkgdir}/CONTROL/postinst
+ mkdir -p ${ipkgdir}/etc/modules.d
+ echo $modname >${ipkgdir}/etc/modules.d/${modlevels[$modname]}-$modname
+ env ${PKG_BUILD} ${ipkgdir} ${PACKAGE_DIR} || exit 1
+done