diff options
Diffstat (limited to 'meta-phosphor/recipes-phosphor/initrdscripts/files/obmc-update.sh')
-rwxr-xr-x | meta-phosphor/recipes-phosphor/initrdscripts/files/obmc-update.sh | 274 |
1 files changed, 274 insertions, 0 deletions
diff --git a/meta-phosphor/recipes-phosphor/initrdscripts/files/obmc-update.sh b/meta-phosphor/recipes-phosphor/initrdscripts/files/obmc-update.sh new file mode 100755 index 000000000..278cd41d7 --- /dev/null +++ b/meta-phosphor/recipes-phosphor/initrdscripts/files/obmc-update.sh @@ -0,0 +1,274 @@ +#!/bin/sh + +echo update: "$@" + +echoerr() { + echo 1>&2 "ERROR: $@" +} + +cd / +if ! test -r /proc/mounts || ! test -f /proc/mounts +then + mkdir -p /proc + mount -t proc proc proc +fi +if ! test -d /sys/class +then + mkdir -p /sys + mount -t sysfs sys sys +fi +if ! test -c /dev/null +then + mkdir -p /dev + mount -t devtmpfs dev dev +fi + +# mtd number N with mtd name Name can be mounted via mtdN, or mtd:Name +# (with a mtd aware fs) or by /dev/mtdblockN (with a mtd or block fs). +mtdismounted() { + m=${1##mtd} + if grep -s "mtdblock$m " /proc/mounts || grep -s "mtd$m " /proc/mounts + then + return 0 + fi + n=$(cat /sys/class/mtd/mtd$m/name) + if test -n "$n" && grep -s "mtd:$n " /proc/mounts + then + return 0 + fi + return 1 +} + +# Detect child partitions when the whole flash is to be updated. +# Ignore mtdNro and mtdblockN names in the class subsystem directory. +childmtds() { + for m in /sys/class/mtd/$1/mtd* + do + m=${m##*/} + if test "${m%ro}" = "${m#mtdblock}" + then + echo $m + fi + done +} + +toobig() { + if test $(stat -L -c "%s" "$1") -gt $(cat /sys/class/mtd/"$2"/size) + then + return 0 + fi + return 1 +} + +findmtd() { + m=$(grep -xl "$1" /sys/class/mtd/*/name) + m=${m%/name} + m=${m##*/} + echo $m +} + +blkid_fs_type() { + # Emulate util-linux's `blkid -s TYPE -o value $1` + # Example busybox blkid output: + # # blkid /dev/mtdblock5 + # /dev/mtdblock5: TYPE="squashfs" + # Process output to extract TYPE value "squashfs". + blkid $1 | sed -e 's/^.*TYPE="//' -e 's/".*$//' +} + +probe_fs_type() { + fst=$(blkid_fs_type $1) + echo ${fst:=jffs2} +} + +rwfs=$(findmtd rwfs) + +rwdev=/dev/mtdblock${rwfs#mtd} +rwopts=rw +rorwopts=ro${rwopts#rw} + +rwdir=/run/initramfs/rw +upper=$rwdir/cow +save=/run/save/${upper##*/} + +mounted= +doflash=y +doclean= +dosave=y +dorestore=y +toram= +checksize=y +checkmount=y + +whitelist=/run/initramfs/whitelist +image=/run/initramfs/image- +imglist= + +while test "$1" != "${1#-}" +do + case "$1" in + --help) + cat <<HERE +Usage: $0 [options] -- Write images in /run/initramfs to flash (/dev/mtd*) + --help Show this message + --no-flash Don't attempt to write images to flash + --ignore-size Don't compare image size to mtd device size + --ignore-mount Don't check if destination is mounted + --save-files Copy whitelisted files to save directory in RAM + --no-save-files Don't copy whitelisted files to save directory + --copy-files Copy files from save directory to rwfs mountpoint + --restore-files Restore files from save directory to rwfs layer + --no-restore-files Don't restore saved files from ram to rwfs layer + --clean-saved-files Delete saved whitelisted files from RAM + --no-clean-saved-files Retain saved whitelisted files in RAM +HERE + + exit 0 ;; + + --no-clean-saved-files) + doclean= + shift ;; + --clean-saved-files) + doclean=y + shift ;; + --no-save-files) + dosave= + shift ;; + --save-files) + dosave=y + shift ;; + --no-restore-files) + dorestore= + shift ;; + --restore-files) + dorestore=y + shift ;; + --no-flash) + doflash= + shift ;; + --ignore-size) + checksize= + shift ;; + --ignore-mount) + checkmount= + doflash= + shift ;; + --copy-files) + toram=y + shift ;; + *) + echoerr "Unknown option $1. Try $0 --help." + exit 1 ;; + esac +done + +if test "x$dosave" = xy +then + if test ! -d $upper -a -n "$rwfs" + then + mkdir -p $rwdir + mount $rwdev $rwdir -t $(probe_fs_type $rwdev) -o $rorwopts + mounted=$rwdir + fi + + while read f + do + # Entries shall start with /, no trailing /.. or embedded /../ + if test "/${f#/}" != "$f" -o "${f%/..}" != "${f#*/../}" + then + echo 1>&2 "WARNING: Skipping bad whitelist entry $f." + continue + fi + if ! test -e "$upper/$f" + then + continue + fi + d="$save/$f" + while test "${d%/}" != "${d%/.}" + do + d="${d%/.}" + d="${d%/}" + done + mkdir -p "${d%/*}" + cp -rp "$upper/$f" "${d%/*}/" + done < $whitelist + + if test -n "$mounted" + then + umount $mounted + fi +fi + +imglist=$(echo $image*) +if test "$imglist" = "$image*" -a ! -e "$imglist" +then + # shell didn't expand the wildcard, so no files exist + echo "No images found to update." + imglist= +fi + +for f in $imglist +do + m=$(findmtd ${f#$image}) + if test -z "$m" + then + echoerr "Unable to find mtd partition for ${f##*/}." + exit 1 + fi + if test -n "$checksize" && toobig "$f" "$m" + then + echoerr "Image ${f##*/} too big for $m." + exit 1 + fi + for s in $m $(childmtds $m) + do + if test -n "$checkmount" && mtdismounted $s + then + echoerr "Device $s is mounted, ${f##*/} is busy." + exit 1 + fi + done +done + +if test -n "$doflash" +then + for f in $imglist + do + if test ! -s $f + then + echo "Skipping empty update of ${f#$image}." + rm $f + continue + fi + m=$(findmtd ${f#$image}) + echo "Updating ${f#$image}..." + flashcp -v $f /dev/$m && rm $f + done +fi + +if test -d $save -a "x$toram" = xy +then + mkdir -p $upper + cp -rp $save/. $upper/ +fi + +if test -d $save -a "x$dorestore" = xy +then + odir=$rwdir + rwdir=/run/rw + upper=$rwdir${upper#$odir} + + mkdir -p $rwdir + mount $rwdev $rwdir -t $(probe_fs_type $rwdev) -o $rwopts + mkdir -p $upper + cp -rp $save/. $upper/ + umount $rwdir + rmdir $rwdir +fi + +if test "x$doclean" = xy +then + rm -rf $save +fi + +exit |