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build_sysext: optimise squashfs for size

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Signed-off-by: Thilo Fromm <thilofromm@microsoft.com>
This commit is contained in:
Thilo Fromm 2023-10-20 18:41:41 +02:00
parent 37cc05ce11
commit d744d32733
1 changed files with 10 additions and 2 deletions
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12
build_sysext
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@ -33,6 +33,8 @@ DEFINE_string base_pkginfo "" \
"Colon-separated list of pkginfo squashfs paths / files generated via 'generate_pkginfo' to base this sysext on. The corresponding base sysexts are expected to be merged with the sysext generated."
DEFINE_string compression "zstd" \
"Compression to use for sysext squashfs. One of 'gzip', 'lzo', 'lz4', 'xz', or 'zstd'. Must be supported by the Flatcar squashfs kernel module in order for the sysext to work."
DEFINE_string mksquashfs_opts "" \
"Additional command line options to pass to mksquashfs. See 'man 1 mksquashfs'. If <compression> is 'zstd' (the default), this option defaults to '-Xcompression-level 22 -b 512K'. Otherwise the default is empty."
DEFINE_boolean ignore_version_mismatch "${FLAGS_FALSE}" \
"Ignore version mismatch between SDK board packages and base squashfs. DANGEROUS."
@ -100,6 +102,10 @@ fi
BUILD_DIR=$(realpath "${FLAGS_image_builddir}")
mkdir -p "${BUILD_DIR}"
if [[ "${FLAGS_compression}" = "zstd" && -z "${FLAGS_mksquashfs_opts}" ]] ; then
FLAGS_mksquashfs_opts="-Xcompression-level 22 -b 512k"
fi
source "${BUILD_LIBRARY_DIR}/toolchain_util.sh" || exit 1
source "${BUILD_LIBRARY_DIR}/board_options.sh" || exit 1
source "${BUILD_LIBRARY_DIR}/reports_util.sh" || exit 1
@ -217,7 +223,8 @@ if [[ "$FLAGS_generate_pkginfo" = "${FLAGS_TRUE}" ]] ; then
info " Creating pkginfo squashfs '${BUILD_DIR}/${SYSEXTNAME}_pkginfo.raw'"
mkdir -p "${BUILD_DIR}/img-pkginfo/var/db"
cp -R "${BUILD_DIR}/install-root/var/db/pkg" "${BUILD_DIR}/img-pkginfo/var/db/"
mksquashfs "${BUILD_DIR}/img-pkginfo" "${BUILD_DIR}/${SYSEXTNAME}_pkginfo.raw" -noappend -comp "${FLAGS_compression}"
mksquashfs "${BUILD_DIR}/img-pkginfo" "${BUILD_DIR}/${SYSEXTNAME}_pkginfo.raw" \
-noappend -comp "${FLAGS_compression}" ${FLAGS_mksquashfs_opts}
fi
if [[ -n "${FLAGS_manglefs_script}" ]]; then
@ -247,7 +254,8 @@ all_fields=(
"ARCHITECTURE=${ARCH}"
)
printf '%s\n' "${all_fields[@]}" >"${BUILD_DIR}/install-root/usr/lib/extension-release.d/extension-release.${SYSEXTNAME}"
mksquashfs "${BUILD_DIR}/install-root" "${BUILD_DIR}/${SYSEXTNAME}.raw" -noappend -comp "${FLAGS_compression}"
mksquashfs "${BUILD_DIR}/install-root" "${BUILD_DIR}/${SYSEXTNAME}.raw" \
-noappend -comp "${FLAGS_compression}" ${FLAGS_mksquashfs_opts}
rm -rf "${BUILD_DIR}"/{fs-root,install-root,workdir}
# Generate reports