diff options
Diffstat (limited to 'core/modules/kernel-vanilla/module.build')
| -rw-r--r-- | core/modules/kernel-vanilla/module.build | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/core/modules/kernel-vanilla/module.build b/core/modules/kernel-vanilla/module.build new file mode 100644 index 00000000..66906fb7 --- /dev/null +++ b/core/modules/kernel-vanilla/module.build @@ -0,0 +1,165 @@ +# 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 "${TARGET_KERNEL_LONG}" ] && return 0 + [ ! -e "${TARGET_DIR}/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=$(grep 'UTS_RELEASE' "${TARGET_DIR}/kernel/ksrc/include/generated/utsrelease.h" | awk -F '"' '{print $2}') + declare -rg TARGET_KERNEL_SHORT=$(echo "$TARGET_KERNEL_LONG" | grep -o -E '^[0-9\.]+') + + # declare path to kernel headers and modules/firmware + declare -rg KERNEL_HEADERS_DIR="${TARGET_DIR}/kernel/ksrc" + declare -rg KERNEL_BASE_DIR="${TARGET_DIR}/kernel/build" + + # print debug info + pinfo "TARGET_KERNEL_LONG: '$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 ...." + if grep -q -- "${REQUIRED_GIT}" "./ksrc/.git/config" && grep -q -- "v${REQUIRED_KERNEL}" "./ksrc/.git/config"; then + pinfo "Trying to update existing clone" + cd ksrc || perror "Could not cd to ksrc" + git pull || perror "Could not pull already checked out repo" + cd .. + else + rm -rf "./ksrc" + git clone --depth 1 "${REQUIRED_GIT}" -b "v${REQUIRED_KERNEL}" ksrc || perror "Could not clone kernel git." + fi + # 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 "${TARGET_CONFIG_FILE}" "ksrc/.config" + # make kernel with the new config + cd ksrc || perror "Could not cd to ksrc, was the kernel source fetched properly?" + pinfo "Preparing kernel for new config ('make oldconfig')." + if [ "x$MLTK_QUIET" = "x1" ]; then + yes "" | make oldconfig || perror "make oldconfig 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)/" "$TARGET_CONFIG_FILE" + fi + fi + done +} + +# helper to patch aufs +patch_aufs() { + local KERNEL_MAJOR=${REQUIRED_KERNEL%%.*} + local AUFS="aufs${KERNEL_MAJOR}" + pinfo "Cloning ${AUFS} standalone git" + cd "$MODULE_WORK_DIR" + [ -d "${AUFS}-standalone/.git" ] && rm -rf "${AUFS}-standalone" # if already there, kill it. + # git: --depth 1 won't work here due to later "checkout origin/branch" + if [ "$KERNEL_MAJOR" = "3" ]; then + git clone "git://aufs.git.sourceforge.net/gitroot/aufs/${AUFS}-standalone.git" || perror "Cloning ${AUFS} failed." + else + git clone "git://github.com/sfjro/${AUFS}-standalone.git" || perror "Cloning ${AUFS} failed." + fi + # get the needed version + [ -n "${SYSTEM_KERNEL_LONG}" ] && local NEEDED_BRANCH=$(echo $REQUIRED_KERNEL | awk -F "." '{print $1"."$2}') \ + || perror "REQUIRED_KERNEL not set, this should not happen!" + pinfo "Getting branch origin/$NEEDED_BRANCH" + cd "$MODULE_WORK_DIR/${AUFS}-standalone" || perror "Could not CD to ${AUFS}-standalone" + git checkout "origin/aufs$NEEDED_BRANCH" || git checkout "origin/aufs4.x-rcN" || 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/" + + cd "$MODULE_WORK_DIR/ksrc" || perror "Could not CD to kernel-source dir ksrc" + + local PATCH + # Mandatory + for PATCH in "${AUFS}-kbuild" "${AUFS}-base" "${AUFS}-mmap"; do + patch -p1 < "$MODULE_WORK_DIR/${AUFS}-standalone/${PATCH}.patch" || perror "${PATCH}.patch failed!" + pinfo "Applied '$MODULE_WORK_DIR/${AUFS}-standalone/${PATCH}.patch'" + done + # Optional - should we error too? + for PATCH in "${AUFS}-loopback" "tmpfs-idr" "vfs-ino"; do + [ -e "$MODULE_WORK_DIR/${AUFS}-standalone/${PATCH}.patch" ] || continue + patch -p1 < "$MODULE_WORK_DIR/${AUFS}-standalone/${PATCH}.patch" || pwarning "${PATCH}.patch failed!" + pinfo "Applied '$MODULE_WORK_DIR/${AUFS}-standalone/${PATCH}.patch'" + done + pinfo "Patched kernel source with aufs-${NEEDED_BRANCH}" + cd "$MODULE_WORK_DIR" + +} + |