Recently, upgrade device autodetection has been added to the mvebu target.
This exposes some shortcomings of the generic export_bootdevice function,
e.g. on the Turris Omnia: export_bootdevice silently reports the root
partition to be the boot device. This makes the sysupgrade process fail at
several places.
Fix this by clearly distinguishing between /proc/cmdline arguments which
specify the boot disk, and those which specify the root partition. Only in
the latter case, strip off the partition, and do it consistently.
root=PARTUUID=<pseudo PARTUUID for MBR> (any partition) and root=/dev/*
(any partition) are accepted.
The root of the problem is that the *existing* export_bootdevice in
/lib/upgrade/common.sh behaves differently, if the kernel is booted with
root=/dev/..., or if it is booted with root=PARTUUID=...
In the former case, it reports back major/minor of the root partition,
in the latter case it reports back major/minor of the complete boot disk.
Targets, which boot with root=/dev/... *and* use export_bootdevice /
export_partdevice, have added workarounds to this behaviour, by specifying
*negative* increments to the export_partdevice function.
Consequently, those targets have to be adapted to use positive increments,
otherwise they are broken by the change to export_bootdevice.
Fixes: 4e8345ff68 ("mvebu: base-files: autodetect upgrade device")
Signed-off-by: Klaus Kudielka <klaus.kudielka@gmail.com>
Tested-by: Tomasz Maciej Nowak <tomek_n@o2.pl>
}
export_bootdevice() {
- local cmdline uuid disk uevent line
+ local cmdline bootdisk rootpart uuid blockdev uevent line
local MAJOR MINOR DEVNAME DEVTYPE
if read cmdline < /proc/cmdline; then
case "$cmdline" in
*block2mtd=*)
- disk="${cmdline##*block2mtd=}"
- disk="${disk%%,*}"
+ bootdisk="${cmdline##*block2mtd=}"
+ bootdisk="${bootdisk%%,*}"
;;
*root=*)
- disk="${cmdline##*root=}"
- disk="${disk%% *}"
+ rootpart="${cmdline##*root=}"
+ rootpart="${rootpart%% *}"
;;
esac
- case "$disk" in
- 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 $(find /dev -type b); do
- set -- $(dd if=$disk bs=1 skip=440 count=4 2>/dev/null | hexdump -v -e '4/1 "%02x "')
+ case "$bootdisk" in
+ /dev/*)
+ uevent="/sys/class/block/${bootdisk##*/}/uevent"
+ ;;
+ esac
+
+ case "$rootpart" in
+ PARTUUID=[a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9]-[a-f0-9][a-f0-9])
+ uuid="${rootpart#PARTUUID=}"
+ uuid="${uuid%-[a-f0-9][a-f0-9]}"
+ for blockdev in $(find /dev -type b); do
+ set -- $(dd if=$blockdev bs=1 skip=440 count=4 2>/dev/null | hexdump -v -e '4/1 "%02x "')
if [ "$4$3$2$1" = "$uuid" ]; then
- uevent="/sys/class/block/${disk##*/}/uevent"
+ uevent="/sys/class/block/${blockdev##*/}/uevent"
break
fi
done
;;
/dev/*)
- uevent="/sys/class/block/${disk##*/}/uevent"
+ uevent="/sys/class/block/${rootpart##*/}/../uevent"
;;
esac
[ "$#" -gt 1 ] && return 1
- export_bootdevice && export_partdevice diskdev -2 || {
+ export_bootdevice && export_partdevice diskdev 0 || {
echo "Unable to determine upgrade device"
return 1
}
mbl_do_upgrade() {
local diskdev partdev diff
- export_bootdevice && export_partdevice diskdev -2 || {
+ export_bootdevice && export_partdevice diskdev 0 || {
echo "Unable to determine upgrade device"
return 1
}
#iterate over each partition from the image and write it to the boot disk
while read part start size; do
- # root is /dev/sd[a|b]2 and not /dev/sd[a|b] this causes some problem
- # one of which is this offset, I'm not sure what's the best fix, so
- # here's a WA.
- let part=$((part - 2))
if export_partdevice partdev $part; then
echo "Writing image to /dev/$partdev..."
get_image "$@" | dd of="/dev/$partdev" ibs="512" obs=1M skip="$start" count="$size" conv=fsync
mbl_copy_config() {
local partdev
- # Same as above /dev/sd[a|b]2 is root, so /boot is -1
- if export_partdevice partdev -1; then
+ if export_partdevice partdev 1; then
mount -t ext4 -o rw,noatime "/dev/$partdev" /mnt
cp -af "$CONF_TAR" /mnt/
umount /mnt
[ "$#" -gt 1 ] && return 1
- export_bootdevice && export_partdevice diskdev -2 || {
+ export_bootdevice && export_partdevice diskdev 0 || {
echo "Unable to determine upgrade device"
return 1
}
platform_do_upgrade() {
local diskdev partdev diff
- export_bootdevice && export_partdevice diskdev -2 || {
+ export_bootdevice && export_partdevice diskdev 0 || {
echo "Unable to determine upgrade device"
return 1
}
#iterate over each partition from the image and write it to the boot disk
while read part start size; do
- # root is /dev/sd[a|b]2 and not /dev/sd[a|b] this causes some problem
- # one of which is this offset, I'm not sure what's the best fix, so
- # here's a WA.
- let part=$((part - 2))
if export_partdevice partdev $part; then
echo "Writing image to /dev/$partdev..."
get_image "$@" | dd of="/dev/$partdev" ibs="512" obs=1M skip="$start" count="$size" conv=fsync
platform_copy_config() {
local partdev
- # Same as above /dev/sd[a|b]2 is root, so /boot is -1
- if export_partdevice partdev -1; then
+ if export_partdevice partdev 1; then
mkdir -p /boot
[ -f /boot/kernel.img ] || mount -t vfat -o rw,noatime "/dev/$partdev" /boot
cp -af "$CONF_TAR" /boot/
. /lib/upgrade/common.sh
- if export_bootdevice && export_partdevice partdev -1; then
+ if export_bootdevice && export_partdevice partdev 1; then
if mount -t vfat -o rw,noatime "/dev/$partdev" /mnt; then
if [ -f /mnt/sysupgrade.tgz ]; then
mv -f /mnt/sysupgrade.tgz /
platform_check_image() {
local diskdev partdev diff
- export_bootdevice && export_partdevice diskdev -2 || {
+ export_bootdevice && export_partdevice diskdev 0 || {
echo "Unable to determine upgrade device"
return 1
}
platform_copy_config() {
local partdev
- if export_partdevice partdev -1; then
+ if export_partdevice partdev 1; then
mount -t vfat -o rw,noatime "/dev/$partdev" /mnt
cp -af "$CONF_TAR" /mnt/
umount /mnt
platform_do_upgrade() {
local diskdev partdev diff
- export_bootdevice && export_partdevice diskdev -2 || {
+ export_bootdevice && export_partdevice diskdev 0 || {
echo "Unable to determine upgrade device"
return 1
}
get_image "$@" | dd of="$diskdev" bs=1024 skip=8 seek=8 count=1016 conv=fsync
#iterate over each partition from the image and write it to the boot disk
while read part start size; do
- part="$(($part - 2))"
if export_partdevice partdev $part; then
echo "Writing image to /dev/$partdev..."
get_image "$@" | dd of="/dev/$partdev" ibs="512" obs=1M skip="$start" count="$size" conv=fsync
. /lib/upgrade/common.sh
- if export_bootdevice && export_partdevice partdev -1; then
+ if export_bootdevice && export_partdevice partdev 1; then
if mount -t vfat -o rw,noatime "/dev/$partdev" /mnt; then
if [ -f /mnt/sysupgrade.tgz ]; then
mv -f /mnt/sysupgrade.tgz /
platform_check_image() {
local diskdev partdev diff
- export_bootdevice && export_partdevice diskdev -2 || {
+ export_bootdevice && export_partdevice diskdev 0 || {
echo "Unable to determine upgrade device"
return 1
}
platform_copy_config() {
local partdev
- if export_partdevice partdev -1; then
+ if export_partdevice partdev 1; then
mount -t vfat -o rw,noatime "/dev/$partdev" /mnt
cp -af "$CONF_TAR" /mnt/
umount /mnt
platform_do_upgrade() {
local diskdev partdev diff
- export_bootdevice && export_partdevice diskdev -2 || {
+ export_bootdevice && export_partdevice diskdev 0 || {
echo "Unable to determine upgrade device"
return 1
}
get_image "$@" | dd of="$diskdev" bs=1024 skip=8 seek=8 count=1016 conv=fsync
#iterate over each partition from the image and write it to the boot disk
while read part start size; do
- part="$(($part - 2))"
if export_partdevice partdev $part; then
echo "Writing image to /dev/$partdev..."
get_image "$@" | dd of="/dev/$partdev" ibs="512" obs=1M skip="$start" count="$size" conv=fsync
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