From: Jo-Philipp Wich Date: Tue, 24 May 2016 10:07:02 +0000 (+0200) Subject: x86: generalize partition discovery for sysupgrade X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=1012701014bd944197031a3c0023527861b521b4;p=librecmc%2Flibrecmc.git x86: generalize partition discovery for sysupgrade Generalize the partition discovery in sysupgrade in order to fix sysupgrade and config backup/recovery on MMC block devices which use a different naming scheme compared to mtdblock or sd* devices. The change also adds the find applet to the ramdisk utilities so that upgrade code can rely on it. The commit is based on the initial submission by Russell Senior at http://patchwork.ozlabs.org/patch/625440/ . Signed-off-by: Russell Senior Signed-off-by: Jo-Philipp Wich --- diff --git a/package/base-files/files/lib/upgrade/common.sh b/package/base-files/files/lib/upgrade/common.sh index 0383d253a3..752a61ccb3 100644 --- a/package/base-files/files/lib/upgrade/common.sh +++ b/package/base-files/files/lib/upgrade/common.sh @@ -53,7 +53,7 @@ run_ramfs() { # [...] /bin/vi /bin/ls /bin/cat /usr/bin/awk /usr/bin/hexdump \ /bin/sleep /bin/zcat /usr/bin/bzcat /usr/bin/printf /usr/bin/wc \ /bin/cut /usr/bin/printf /bin/sync /bin/mkdir /bin/rmdir \ - /bin/rm /usr/bin/basename /bin/kill /bin/chmod + /bin/rm /usr/bin/basename /bin/kill /bin/chmod /usr/bin/find install_bin /bin/uclient-fetch /bin/wget install_bin /sbin/mtd diff --git a/target/linux/x86/base-files/lib/preinit/79_move_config b/target/linux/x86/base-files/lib/preinit/79_move_config index 1d4873d78b..5ac81cb90d 100644 --- a/target/linux/x86/base-files/lib/preinit/79_move_config +++ b/target/linux/x86/base-files/lib/preinit/79_move_config @@ -2,10 +2,12 @@ # Copyright (C) 2012-2015 OpenWrt.org move_config() { + local partdev + . /lib/upgrade/platform.sh - if platform_export_bootpart; then - mount -t ext4 -o rw,noatime "$BOOTPART" /mnt + if platform_export_bootdevice && platform_export_partdevice partdev 1; then + mount -t ext4 -o rw,noatime "/dev/$partdev" /mnt mv -f /mnt/sysupgrade.tgz / umount /mnt fi diff --git a/target/linux/x86/base-files/lib/upgrade/platform.sh b/target/linux/x86/base-files/lib/upgrade/platform.sh index 29eac77dfb..c8bc3f7f60 100644 --- a/target/linux/x86/base-files/lib/upgrade/platform.sh +++ b/target/linux/x86/base-files/lib/upgrade/platform.sh @@ -1,5 +1,21 @@ -platform_export_bootpart() { - local cmdline uuid disk +platform_export_partdevice() { + local var="$1" offset="$2" + local uevent MAJOR MINOR DEVNAME DEVTYPE + + for uevent in /sys/class/block/*/uevent; do + . "$uevent" + if [ $BOOTDEV_MAJOR = $MAJOR -a $(($BOOTDEV_MINOR + $offset)) = $MINOR -a -b "/dev/$DEVNAME" ]; then + export "$var=$DEVNAME" + return 0 + fi + done + + return 1 +} + +platform_export_bootdevice() { + local cmdline uuid disk uevent + local MAJOR MINOR DEVNAME DEVTYPE if read cmdline < /proc/cmdline; then case "$cmdline" in @@ -17,20 +33,27 @@ platform_export_bootpart() { PARTUUID=[a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9]-02) uuid="${disk#PARTUUID=}" uuid="${uuid%-02}" - for disk in /dev/*; do - [ -b "$disk" ] || continue + for disk in $(find /dev -type b); do set -- $(dd if=$disk bs=1 skip=440 count=4 2>/dev/null | hexdump -v -e '4/1 "%02x "') if [ "$4$3$2$1" = "$uuid" ]; then - export BOOTPART="${disk}1" - return 0 + uevent="/sys/class/block/${disk##*/}/uevent" + break fi done ;; /dev/*) - export BOOTPART="${disk%[0-9]}1" - return 0 + uevent="/sys/class/block/${disk##*/}/uevent" ;; esac + + if [ -e "$uevent" ]; then + . "$uevent" + + export BOOTDEV_MAJOR=$MAJOR + export BOOTDEV_MINOR=$MINOR + + return 0 + fi fi return 1 @@ -49,8 +72,10 @@ platform_check_image() { } platform_copy_config() { - if [ -b "$BOOTPART" ]; then - mount -t ext4 -o rw,noatime "$BOOTPART" /mnt + local partdev + + if platform_export_partdevice partdev 1; then + mount -t ext4 -o rw,noatime "/dev/$partdev" /mnt cp -af "$CONF_TAR" /mnt/ umount /mnt fi @@ -87,18 +112,16 @@ get_partitions() { # } platform_do_upgrade() { - platform_export_bootpart - disk="${BOOTPART%[0-9]}" + local diskdev partdev ibs diff - if [ -b "$disk" ]; then + if platform_export_bootdevice && platform_export_partdevice diskdev 0; then sync if [ "$SAVE_PARTITIONS" = "1" ]; then - get_partitions "$disk" bootdisk - + get_partitions "/dev/$diskdev" bootdisk #get block size - if [ -f "/sys/block/${disk##*/}/queue/physical_block_size" ]; then - ibs="$(cat "/sys/block/${disk##*/}/queue/physical_block_size")" + if [ -f "/sys/block/$diskdev/queue/physical_block_size" ]; then + ibs="$(cat "/sys/block/$diskdev/queue/physical_block_size")" else ibs=512 fi @@ -114,21 +137,25 @@ platform_do_upgrade() { echo "Partition layout is changed. Full image will be written." ask_bool 0 "Abort" && exit - get_image "$@" | dd of="$disk" bs=4096 conv=fsync + get_image "$@" | dd of="/dev/$diskdev" bs=4096 conv=fsync return 0 fi #iterate over each partition from the image and write it to the boot disk while read part start size; do - echo "Writing image to $disk$part..." - get_image "$@" | dd of="$disk$part" ibs="$ibs" obs=1M skip="$start" count="$size" conv=fsync + if platform_export_partdevice partdev $part; then + echo "Writing image to /dev/$partdev..." + get_image "$@" | dd of="/dev/$partdev" ibs="$ibs" obs=1M skip="$start" count="$size" conv=fsync + else + echo "Unable to find partition $part device, skipped." + fi done < /tmp/partmap.image #copy partition uuid - echo "Writing new UUID to $disk$part..." - get_image "$@" | dd of="$disk" bs=1 skip=440 count=4 seek=440 conv=fsync + echo "Writing new UUID to /dev/$diskdev..." + get_image "$@" | dd of="/dev/$diskdev" bs=1 skip=440 count=4 seek=440 conv=fsync else - get_image "$@" | dd of="$disk" bs=4096 conv=fsync + get_image "$@" | dd of="/dev/$diskdev" bs=4096 conv=fsync fi sleep 1