From 9ba4bcb645898d562498ea66a0df958ef0e7a68c Mon Sep 17 00:00:00 2001 From: P J P Date: Tue, 12 Nov 2013 15:10:22 -0800 Subject: [PATCH] initramfs: read CONFIG_RD_ variables for initramfs compression When expert configuration option(CONFIG_EXPERT) is enabled, menuconfig offers a choice of compression algorithm to compress initial ramfs image; This choice is stored into CONFIG_RD_* variables. But usr/Makefile uses earlier INITRAMFS_COMPRESSION_* macros to build initial ramfs file. Since none of them is defined, resulting 'initramfs_data.cpio' file remains un-compressed. This patch updates the Makefile to use CONFIG_RD_* variables and adds support for LZ4 compression algorithm. Also updates the 'gen_initramfs_list.sh' script to check whether a selected compression command is accessible or not. And fall-back to default gzip(1) compression when it is not. Signed-off-by: P J P Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- scripts/gen_initramfs_list.sh | 24 ++++++++++++++++++------ usr/Makefile | 23 ++++++++++++++--------- 2 files changed, 32 insertions(+), 15 deletions(-) diff --git a/scripts/gen_initramfs_list.sh b/scripts/gen_initramfs_list.sh index b482f16..ef47409 100644 --- a/scripts/gen_initramfs_list.sh +++ b/scripts/gen_initramfs_list.sh @@ -240,12 +240,24 @@ case "$arg" in output_file="$1" cpio_list="$(mktemp ${TMPDIR:-/tmp}/cpiolist.XXXXXX)" output=${cpio_list} - echo "$output_file" | grep -q "\.gz$" && compr="gzip -n -9 -f" - echo "$output_file" | grep -q "\.bz2$" && compr="bzip2 -9 -f" - echo "$output_file" | grep -q "\.lzma$" && compr="lzma -9 -f" - echo "$output_file" | grep -q "\.xz$" && \ - compr="xz --check=crc32 --lzma2=dict=1MiB" - echo "$output_file" | grep -q "\.lzo$" && compr="lzop -9 -f" + echo "$output_file" | grep -q "\.gz$" \ + && [ -x "`which gzip 2> /dev/null`" ] \ + && compr="gzip -n -9 -f" + echo "$output_file" | grep -q "\.bz2$" \ + && [ -x "`which bzip2 2> /dev/null`" ] \ + && compr="bzip2 -9 -f" + echo "$output_file" | grep -q "\.lzma$" \ + && [ -x "`which lzma 2> /dev/null`" ] \ + && compr="lzma -9 -f" + echo "$output_file" | grep -q "\.xz$" \ + && [ -x "`which xz 2> /dev/null`" ] \ + && compr="xz --check=crc32 --lzma2=dict=1MiB" + echo "$output_file" | grep -q "\.lzo$" \ + && [ -x "`which lzop 2> /dev/null`" ] \ + && compr="lzop -9 -f" + echo "$output_file" | grep -q "\.lz4$" \ + && [ -x "`which lz4 2> /dev/null`" ] \ + && compr="lz4 -9 -f" echo "$output_file" | grep -q "\.cpio$" && compr="cat" shift ;; diff --git a/usr/Makefile b/usr/Makefile index 029ffe6..e767f01 100644 --- a/usr/Makefile +++ b/usr/Makefile @@ -6,20 +6,23 @@ klibcdirs:; PHONY += klibcdirs -# Gzip -suffix_$(CONFIG_INITRAMFS_COMPRESSION_GZIP) = .gz - # Bzip2 -suffix_$(CONFIG_INITRAMFS_COMPRESSION_BZIP2) = .bz2 +suffix_$(CONFIG_RD_BZIP2) = .bz2 # Lzma -suffix_$(CONFIG_INITRAMFS_COMPRESSION_LZMA) = .lzma +suffix_$(CONFIG_RD_LZMA) = .lzma # XZ -suffix_$(CONFIG_INITRAMFS_COMPRESSION_XZ) = .xz +suffix_$(CONFIG_RD_XZ) = .xz # Lzo -suffix_$(CONFIG_INITRAMFS_COMPRESSION_LZO) = .lzo +suffix_$(CONFIG_RD_LZO) = .lzo + +# Lz4 +suffix_$(CONFIG_RD_LZ4) = .lz4 + +# Gzip +suffix_$(CONFIG_RD_GZIP) = .gz AFLAGS_initramfs_data.o += -DINITRAMFS_IMAGE="usr/initramfs_data.cpio$(suffix_y)" @@ -53,7 +56,10 @@ endif quiet_cmd_initfs = GEN $@ cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input) -targets := initramfs_data.cpio.gz initramfs_data.cpio.bz2 initramfs_data.cpio.lzma initramfs_data.cpio.xz initramfs_data.cpio.lzo initramfs_data.cpio +targets := initramfs_data.cpio.gz initramfs_data.cpio.bz2 \ + initramfs_data.cpio.lzma initramfs_data.cpio.xz \ + initramfs_data.cpio.lzo initramfs_data.cpio.lz4 \ + initramfs_data.cpio # do not try to update files included in initramfs $(deps_initramfs): ; @@ -66,4 +72,3 @@ $(deps_initramfs): klibcdirs $(obj)/initramfs_data.cpio$(suffix_y): $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs $(Q)$(initramfs) -l $(ramfs-input) > $(obj)/.initramfs_data.cpio.d $(call if_changed,initfs) - -- 2.7.4