183 lines
6.1 KiB
Diff
183 lines
6.1 KiB
Diff
From: Jo-Philipp Wich <jo@mein.io>
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Date: Tue, 24 May 2016 12:07:02 +0200
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Subject: x86: generalize partition discovery for sysupgrade
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Generalize the partition discovery in sysupgrade in order to fix sysupgrade
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and config backup/recovery on MMC block devices which use a different naming
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scheme compared to mtdblock or sd* devices.
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The change also adds the find applet to the ramdisk utilities so that upgrade
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code can rely on it.
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The commit is based on the initial submission by Russell Senior at
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http://patchwork.ozlabs.org/patch/625440/ .
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Signed-off-by: Russell Senior <russell@personaltelco.net>
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Signed-off-by: Jo-Philipp Wich <jo@mein.io>
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Backport of LEDE 1012701014bd944197031a3c0023527861b521b4
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diff --git a/package/base-files/files/lib/upgrade/common.sh b/package/base-files/files/lib/upgrade/common.sh
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index dc865544f65c16399dcced55b8b09c671b31b5d1..14684959dd46d04b1c4b72213dbe06943ae64686 100644
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--- a/package/base-files/files/lib/upgrade/common.sh
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+++ b/package/base-files/files/lib/upgrade/common.sh
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@@ -53,7 +53,7 @@ run_ramfs() { # <command> [...]
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/bin/dd /bin/vi /bin/ls /bin/cat /usr/bin/awk /usr/bin/hexdump \
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/bin/sleep /bin/zcat /usr/bin/bzcat /usr/bin/printf /usr/bin/wc \
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/bin/cut /usr/bin/printf /bin/sync /bin/mkdir /bin/rmdir \
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- /bin/rm /usr/bin/basename /bin/kill /bin/chmod
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+ /bin/rm /usr/bin/basename /bin/kill /bin/chmod /usr/bin/find
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install_bin /sbin/mtd
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install_bin /sbin/mount_root
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diff --git a/target/linux/x86/base-files/lib/preinit/79_move_config b/target/linux/x86/base-files/lib/preinit/79_move_config
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index 1d4873d78b480cb3f11e04e6246559417b431a8a..5ac81cb90d1c15782a9c4f271720cfa66d6d03a9 100644
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--- a/target/linux/x86/base-files/lib/preinit/79_move_config
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+++ b/target/linux/x86/base-files/lib/preinit/79_move_config
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@@ -2,10 +2,12 @@
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# Copyright (C) 2012-2015 OpenWrt.org
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move_config() {
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+ local partdev
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+
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. /lib/upgrade/platform.sh
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- if platform_export_bootpart; then
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- mount -t ext4 -o rw,noatime "$BOOTPART" /mnt
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+ if platform_export_bootdevice && platform_export_partdevice partdev 1; then
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+ mount -t ext4 -o rw,noatime "/dev/$partdev" /mnt
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mv -f /mnt/sysupgrade.tgz /
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umount /mnt
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fi
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diff --git a/target/linux/x86/base-files/lib/upgrade/platform.sh b/target/linux/x86/base-files/lib/upgrade/platform.sh
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index 29eac77dfb0ae52f241696f3f62dce7d16106b20..c8bc3f7f608fc82ee3afc049b64af3a740fd2c37 100644
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--- a/target/linux/x86/base-files/lib/upgrade/platform.sh
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+++ b/target/linux/x86/base-files/lib/upgrade/platform.sh
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@@ -1,5 +1,21 @@
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-platform_export_bootpart() {
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- local cmdline uuid disk
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+platform_export_partdevice() {
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+ local var="$1" offset="$2"
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+ local uevent MAJOR MINOR DEVNAME DEVTYPE
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+
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+ for uevent in /sys/class/block/*/uevent; do
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+ . "$uevent"
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+ if [ $BOOTDEV_MAJOR = $MAJOR -a $(($BOOTDEV_MINOR + $offset)) = $MINOR -a -b "/dev/$DEVNAME" ]; then
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+ export "$var=$DEVNAME"
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+ return 0
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+ fi
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+ done
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+
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+ return 1
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+}
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+
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+platform_export_bootdevice() {
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+ local cmdline uuid disk uevent
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+ local MAJOR MINOR DEVNAME DEVTYPE
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if read cmdline < /proc/cmdline; then
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case "$cmdline" in
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@@ -17,20 +33,27 @@ platform_export_bootpart() {
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PARTUUID=[a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9]-02)
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uuid="${disk#PARTUUID=}"
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uuid="${uuid%-02}"
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- for disk in /dev/*; do
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- [ -b "$disk" ] || continue
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+ for disk in $(find /dev -type b); do
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set -- $(dd if=$disk bs=1 skip=440 count=4 2>/dev/null | hexdump -v -e '4/1 "%02x "')
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if [ "$4$3$2$1" = "$uuid" ]; then
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- export BOOTPART="${disk}1"
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- return 0
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+ uevent="/sys/class/block/${disk##*/}/uevent"
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+ break
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fi
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done
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;;
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/dev/*)
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- export BOOTPART="${disk%[0-9]}1"
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- return 0
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+ uevent="/sys/class/block/${disk##*/}/uevent"
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;;
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esac
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+
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+ if [ -e "$uevent" ]; then
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+ . "$uevent"
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+
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+ export BOOTDEV_MAJOR=$MAJOR
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+ export BOOTDEV_MINOR=$MINOR
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+
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+ return 0
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+ fi
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fi
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return 1
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@@ -49,8 +72,10 @@ platform_check_image() {
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}
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platform_copy_config() {
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- if [ -b "$BOOTPART" ]; then
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- mount -t ext4 -o rw,noatime "$BOOTPART" /mnt
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+ local partdev
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+
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+ if platform_export_partdevice partdev 1; then
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+ mount -t ext4 -o rw,noatime "/dev/$partdev" /mnt
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cp -af "$CONF_TAR" /mnt/
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umount /mnt
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fi
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@@ -87,18 +112,16 @@ get_partitions() { # <device> <filename>
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}
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platform_do_upgrade() {
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- platform_export_bootpart
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- disk="${BOOTPART%[0-9]}"
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+ local diskdev partdev ibs diff
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- if [ -b "$disk" ]; then
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+ if platform_export_bootdevice && platform_export_partdevice diskdev 0; then
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sync
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if [ "$SAVE_PARTITIONS" = "1" ]; then
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- get_partitions "$disk" bootdisk
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-
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+ get_partitions "/dev/$diskdev" bootdisk
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#get block size
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- if [ -f "/sys/block/${disk##*/}/queue/physical_block_size" ]; then
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- ibs="$(cat "/sys/block/${disk##*/}/queue/physical_block_size")"
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+ if [ -f "/sys/block/$diskdev/queue/physical_block_size" ]; then
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+ ibs="$(cat "/sys/block/$diskdev/queue/physical_block_size")"
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else
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ibs=512
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fi
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@@ -114,21 +137,25 @@ platform_do_upgrade() {
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echo "Partition layout is changed. Full image will be written."
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ask_bool 0 "Abort" && exit
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- get_image "$@" | dd of="$disk" bs=4096 conv=fsync
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+ get_image "$@" | dd of="/dev/$diskdev" bs=4096 conv=fsync
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return 0
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fi
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#iterate over each partition from the image and write it to the boot disk
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while read part start size; do
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- echo "Writing image to $disk$part..."
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- get_image "$@" | dd of="$disk$part" ibs="$ibs" obs=1M skip="$start" count="$size" conv=fsync
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+ if platform_export_partdevice partdev $part; then
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+ echo "Writing image to /dev/$partdev..."
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+ get_image "$@" | dd of="/dev/$partdev" ibs="$ibs" obs=1M skip="$start" count="$size" conv=fsync
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+ else
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+ echo "Unable to find partition $part device, skipped."
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+ fi
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done < /tmp/partmap.image
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#copy partition uuid
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- echo "Writing new UUID to $disk$part..."
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- get_image "$@" | dd of="$disk" bs=1 skip=440 count=4 seek=440 conv=fsync
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+ echo "Writing new UUID to /dev/$diskdev..."
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+ get_image "$@" | dd of="/dev/$diskdev" bs=1 skip=440 count=4 seek=440 conv=fsync
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else
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- get_image "$@" | dd of="$disk" bs=4096 conv=fsync
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+ get_image "$@" | dd of="/dev/$diskdev" bs=4096 conv=fsync
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fi
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sleep 1
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