Commit 96680975 authored by Masahiro Yamada's avatar Masahiro Yamada
Browse files

initramfs: generate dependency list and cpio at the same time 



Currently, this script is run twice, for the dependency list, and then
for the cpio archive.

The first one is re-run every time although its build log is suppressed
so nobody notices it.

Make it work more efficiently by generating the cpio and the dependency
list at the same time.

Signed-off-by: default avatarMasahiro Yamada <masahiroy@kernel.org>
parent 3e176683

usr/Makefile

+1 −2
Original line number Diff line number Diff line
@@ -39,7 +39,7 @@ ifneq ($(wildcard $(obj)/$(datafile_d_y)),) 
endif



quiet_cmd_initfs = GEN     $@

      cmd_initfs = $(CONFIG_SHELL) $< -o $@ $(ramfs-args) $(ramfs-input)

      cmd_initfs = $(CONFIG_SHELL) $< -o $@ -l $(obj)/$(datafile_d_y) $(ramfs-args) $(ramfs-input)



targets := $(datafile_y)
@@ -52,7 +52,6 @@ $(deps_initramfs): ; 
# 3) If gen_init_cpio are newer than initramfs_data.cpio

# 4) Arguments to gen_initramfs.sh changes

$(obj)/$(datafile_y): $(src)/gen_initramfs.sh $(obj)/gen_init_cpio $(deps_initramfs) FORCE

	$(Q)$< -l $(ramfs-input) > $(obj)/$(datafile_d_y)

	$(call if_changed,initfs)



subdir-$(CONFIG_UAPI_HEADER_TEST) += include

usr/gen_initramfs.sh

+46 −62
Original line number Diff line number Diff line
@@ -15,9 +15,10 @@ set -e 
usage() {

cat << EOF

Usage:

$0 [-o <file>] [-u <uid>] [-g <gid>] {-d | <cpio_source>} ...

$0 [-o <file>] [-l <dep_list>] [-u <uid>] [-g <gid>] {-d | <cpio_source>} ...

	-o <file>      Create compressed initramfs file named <file> using

		       gen_init_cpio and compressor depending on the extension

	-l <dep_list>  Create dependency list named <dep_list>

	-u <uid>       User ID to map to user ID 0 (root).

		       <uid> is only meaningful if <cpio_source> is a

		       directory.  "squash" forces all files to uid 0.
@@ -42,11 +43,6 @@ field() { 
	shift $1 ; echo $1

}



list_default_initramfs() {

	# echo usr/kinit/kinit

	:

}



default_initramfs() {

	cat <<-EOF >> ${output}

		# This is a very simple, default initramfs
@@ -81,10 +77,6 @@ filetype() { 
	return 0

}



list_print_mtime() {

	:

}



print_mtime() {

	local my_mtime="0"
@@ -97,10 +89,10 @@ print_mtime() { 
}



list_parse() {

	if [ -L "$1" ]; then

	if [ -z "$dep_list" -o -L "$1" ]; then

		return

	fi

	echo "$1" | sed 's/:/\\:/g; s/$/ \\/'

	echo "$1" | sed 's/:/\\:/g; s/$/ \\/' >> $dep_list

}



# for each file print a line in following format
@@ -161,28 +153,25 @@ unknown_option() { 
	exit 1

}



list_header() {

	:

}



header() {

	printf "\n#####################\n# $1\n" >> ${output}

}



# process one directory (incl sub-directories)

dir_filelist() {

	${dep_list}header "$1"

	header "$1"



	srcdir=$(echo "$1" | sed -e 's://*:/:g')

	dirlist=$(find "${srcdir}" -printf "%p %m %U %G\n" | LANG=C sort)



	# If $dirlist is only one line, then the directory is empty

	if [  "$(echo "${dirlist}" | wc -l)" -gt 1 ]; then

		${dep_list}print_mtime "$1"

		print_mtime "$1"



		echo "${dirlist}" | \

		while read x; do

			${dep_list}parse ${x}

			list_parse $x

			parse $x

		done

	fi

}
@@ -193,22 +182,21 @@ dir_filelist() { 
input_file() {

	source="$1"

	if [ -f "$1" ]; then

		${dep_list}header "$1"

		header "$1"

		is_cpio="$(echo "$1" | sed 's/^.*\.cpio\(\..*\)\{0,1\}/cpio/')"

		if [ $2 -eq 0 -a ${is_cpio} = "cpio" ]; then

			cpio_file=$1

			echo "$1" | grep -q '^.*\.cpio\..*' && is_cpio_compressed="compressed"

			[ ! -z ${dep_list} ] && echo "$1"

			[ -n "$dep_list" ] && echo "$1" >> $dep_list

			return 0

		fi

		if [ -z ${dep_list} ]; then

		print_mtime "$1" >> ${output}

		cat "$1"         >> ${output}

		else

		        echo "$1 \\"

		if [ -n "$dep_list" ]; then

		        echo "$1 \\"  >> $dep_list

			cat "$1" | while read type dir file perm ; do

				if [ "$type" = "file" ]; then

					echo "$file \\";

					echo "$file \\" >> $dep_list

				fi

			done

		fi
@@ -231,15 +219,16 @@ output_file="" 
is_cpio_compressed=

compr="gzip -n -9 -f"



while [ $# -gt 0 ]; do

	arg="$1"

	shift

	case "$arg" in

		"-l")	# files included in initramfs - used by kbuild

		dep_list="list_"

		echo "deps_initramfs := \\"

			dep_list="$1"

			echo "deps_initramfs := \\" > $dep_list

			shift

			;;

		"-o")	# generate compressed cpio image named $1

		shift

			output_file="$1"

			cpio_list="$(mktemp ${TMPDIR:-/tmp}/cpiolist.XXXXXX)"

			output=${cpio_list}
@@ -264,11 +253,6 @@ case "$arg" in 
			echo "$output_file" | grep -q "\.cpio$" && compr="cat"

			shift

			;;

esac

while [ $# -gt 0 ]; do

	arg="$1"

	shift

	case "$arg" in

		"-u")	# map $1 to uid=0 (root)

			root_uid="$1"

			[ "$root_uid" = "-1" ] && root_uid=$(id -u || echo 0)
@@ -280,7 +264,7 @@ while [ $# -gt 0 ]; do 
			shift

			;;

		"-d")	# display default initramfs list

			${dep_list}default_initramfs

			default_initramfs

			;;

		"-h")

			usage

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