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#!/bin/bash
# Customized kernel from system: fetch Distro's kernel sources, patch configuration, recompile
# This overrides get_kernel_version from kernel.inc, so the variables will be set properly
get_kernel_version() {
# Do not use MODULE_DIR here as this function might run when we process another module!
[ -n "${TARGET_KERNEL_LONG}" ] && return 0
[ ! -e "${ROOT_DIR}/tmp/work/kernel/ksrc/include/generated/utsrelease.h" ] && return 0
# determine kernel version that will be running in the generated system
# declare kernel version stuff
declare -rg TARGET_KERNEL_LONG=$(grep 'UTS_RELEASE' "${ROOT_DIR}/tmp/work/kernel/ksrc/include/generated/utsrelease.h" | awk -F '"' '{print $2}')
declare -rg TARGET_KERNEL_SHORT=$(echo "$TARGET_KERNEL_LONG" | grep -o -E '^[0-9\.]+')
# declare path to kernel headers and modules/firmware
declare -rg KERNEL_HEADERS_DIR="${ROOT_DIR}/tmp/work/kernel/ksrc"
declare -rg KERNEL_BASE_DIR="${ROOT_DIR}/tmp/work/kernel/build"
# print debug info
pinfo "TARGET_KERNEL_LONG: '$TARGET_KERNEL_LONG'"
pinfo "TARGET_KERNEL_SHORT: '$TARGET_KERNEL_SHORT'"
pdebug "KERNEL_BASE_DIR: '$KERNEL_BASE_DIR'"
}
fetch_source() {
pdebug "getting kernel sources via git ...."
[ -d ./ksrc ] && rm -rf ./ksrc
git clone --depth 1 "${REQUIRED_GIT}" -b "${REQUIRED_GIT_BRANCH}" ksrc || perror "Could not clone kernel git."
# check for aufs
local RSL=$(find ksrc/ -type d -name aufs)
if [ -z "$RSL" ]; then
pinfo "aufs not found in kernel sources, patching it..."
patch_aufs
else
pinfo "aufs detected in kernel source :)"
fi
# remember the current kernel version
echo "${SYSTEM_KERNEL_LONG}" > ksrc/KVERSION
}
build() {
local TARGET_CONFIG_FILE="openslx.config"
rm -f "${TARGET_CONFIG_FILE}"
# update config and copy to ksrc
pinfo "Updating kernel config..."
update_config
cp "${TARGET_CONFIG_FILE}" "ksrc/.config"
# make kernel with the new config
cde ksrc
pinfo "Preparing kernel for new config ('make oldconfig')."
if [ "x$MLTK_QUIET" = "x1" ]; then
make olddefconfig || perror "make olddefconfig failed."
else
make oldconfig || perror "make oldconfig failed."
fi
make prepare || perror "make prepare failed."
make scripts || perror "make scripts failed."
pinfo "Compiling kernel... (this will take some time)"
# explicitly state number of cores here, as MAKEFLAGS seems to be overridden
make "-j$CPU_CORES" || perror "make failed."
# install modules to build directory
pinfo "Installing kernel modules..."
if [ -d "${MODULE_BUILD_DIR}/lib/modules" ]; then
rm -r "${MODULE_BUILD_DIR}/lib/modules" || pwarning "Could not clean old modules."
fi
make INSTALL_MOD_PATH="${MODULE_BUILD_DIR}" INSTALL_MOD_STRIP=1 modules_install || perror "make modules_install failed in ${MODULE_BUILD_DIR}."
cd - 2> /dev/null
# copy kernel to build
cp ksrc/arch/x86/boot/bzImage "${MODULE_BUILD_DIR}/kernel"
pinfo "Kernel was successfully built at ${MODULE_BUILD_DIR}/kernel"
[ -z "${KERNEL_BUILD_DIR}" ] && KERNEL_BUILD_DIR="${MODULE_BUILD_DIR}"
}
post_copy() {
:
}
# helper function to update the current kernel config with our parameters
update_config() {
# first we need to update the current config
local BASE_CONFIG_FILE="/boot/config-$(uname -r)"
[ -e "${BASE_CONFIG_FILE}" ] || perror "$BASE_CONFIG_FILE could not be found! This should not happen."
# check for our wanted config parameter
local OPENSLX_WANTED_CONFIG="${ROOT_DIR}/data/kernel.wanted.config"
[ -e "${OPENSLX_WANTED_CONFIG}" ] || perror "$OPENSLX_WANTED_CONFIG does not exist! Please add a list of wanted kernel config parameters."
# copy basic config file
cp "$BASE_CONFIG_FILE" "$TARGET_CONFIG_FILE"
for WANTED_CONFIG in $(cat $OPENSLX_WANTED_CONFIG|sort -u); do
local CONFIG_PARAM_NAME="$(echo $WANTED_CONFIG | awk -F "=" '{print $1}')"
local SEARCH_RESULT="$(grep -E "^\s*$(echo "$CONFIG_PARAM_NAME" | escape_search)=" "$BASE_CONFIG_FILE")"
#echo "Process: $SEARCH_RESULT"
# analyse results
if [ "x$SEARCH_RESULT" == "x" ]; then
# no match, add it
sed -i -r "s/^\s*#.*\s$(echo "$CONFIG_PARAM_NAME" | escape_search)[^_A-Z0-9].*$//" "$TARGET_CONFIG_FILE"
echo "$WANTED_CONFIG" >> "$TARGET_CONFIG_FILE"
else
# match, change to our setting if they differ
if [ "x$SEARCH_RESULT" != "x$WANTED_CONFIG" ]; then
sed -i "s/$(echo "$SEARCH_RESULT" | escape_search)/$(echo "$WANTED_CONFIG" | escape_replace)/" "$TARGET_CONFIG_FILE"
fi
fi
done
}
# helper to patch aufs
patch_aufs() {
pinfo "Cloning aufs3 standalone git"
cd "$MODULE_WORK_DIR"
[ -d "aufs3-standalone/.git" ] && rm -rf "aufs3-standalone" # if already there, kill it.
# git: --depth 1 won't work here due to later "checkout origin/branch"
git clone "git://aufs.git.sourceforge.net/gitroot/aufs/aufs3-standalone.git" || perror "Cloning aufs3 failed."
# get the needed version
[ ! -z ${SYSTEM_KERNEL_LONG} ] && local NEEDED_BRANCH=$(echo $SYSTEM_KERNEL_LONG | awk -F "." '{print $1"."$2}') \
|| perror "SYSTEM_KERNEL_LONG not set, this should not happen!"
pinfo "Getting branch origin/$NEEDED_BRANCH"
cde "$MODULE_WORK_DIR/aufs3-standalone"
git checkout "origin/aufs$NEEDED_BRANCH" || perror "Could not checkout needed branch."
pinfo "Starting to patch... $NEEDED_BRANCH"
tarcopy "Documentation fs" "$MODULE_WORK_DIR/ksrc"
# Quick-and-dirty aufs_type.h copying:
[ -e "include/linux/aufs_type.h" ] && cp "include/linux/aufs_type.h" "$MODULE_WORK_DIR/ksrc/include/linux/"
[ -e "include/uapi/linux/aufs_type.h" ] && cp "include/uapi/linux/aufs_type.h" "$MODULE_WORK_DIR/ksrc/include/uapi/linux/"
cde "$MODULE_WORK_DIR/ksrc"
patch -p1 < "$MODULE_WORK_DIR/aufs3-standalone/aufs3-kbuild.patch" || perror "aufs3-standalone/aufs3-kbuild.patch failed!"
patch -p1 < "$MODULE_WORK_DIR/aufs3-standalone/aufs3-base.patch" || perror "aufs3-standalone/aufs3-base.patch failed!"
# this following 'if' is a burning shame - caused as patching under eg. openSuse 13.1 is always unsuccessful due to hunk failing
if [ -f "$MODULE_WORK_DIR/aufs3-standalone/aufs3-mmap.patch" ]; then
patch -p1 < "$MODULE_WORK_DIR/aufs3-standalone/aufs3-mmap.patch" || pwarning "Problem patching aufs3-mmap.patch: hunks failed?"
fi
pinfo "Patched kernel source with aufs-${NEEDED_BRANCH}"
cd "$MODULE_WORK_DIR"
}
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