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base-files: improve lib/upgrade/common.sh

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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>
v19.07.3_mercusys_ac12_duma
Klaus Kudielka 5 years ago committed by Christian Lamparter
parent 6411eac5da
commit ad62247800
7 changed files with 33 additions and 39 deletions
Show Stats Download Patch File Download Diff File

32
package/base-files/files/lib/upgrade/common.sh
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@ -101,35 +101,41 @@ get_magic_long() {
}
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

11
target/linux/apm821xx/base-files/lib/upgrade/wdbook.sh
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@ -7,7 +7,7 @@ mbl_do_platform_check() {
[ "$#" -gt 1 ] && return 1
export_bootdevice && export_partdevice diskdev -2 || {
export_bootdevice && export_partdevice diskdev 0 || {
echo "Unable to determine upgrade device"
return 1
}
@ -36,7 +36,7 @@ mbl_do_platform_check() {
mbl_do_upgrade() {
local diskdev partdev diff
export_bootdevice && export_partdevice diskdev -2 || {
export_bootdevice && export_partdevice diskdev 0 || {
echo "Unable to determine upgrade device"
return 1
}
@ -70,10 +70,6 @@ mbl_do_upgrade() {
#iterate over each partition from the image and write it to the boot disk
while read part start size; do
# root is /dev/sd[a|b]2 and not /dev/sd[a|b] this causes some problem
# one of which is this offset, I'm not sure what's the best fix, so
# here's a WA.
let part=$((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
@ -90,8 +86,7 @@ mbl_do_upgrade() {
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

11
target/linux/brcm2708/base-files/lib/upgrade/platform.sh
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@ -9,7 +9,7 @@ platform_check_image() {
[ "$#" -gt 1 ] && return 1
export_bootdevice && export_partdevice diskdev -2 || {
export_bootdevice && export_partdevice diskdev 0 || {
echo "Unable to determine upgrade device"
return 1
}
@ -38,7 +38,7 @@ platform_check_image() {
platform_do_upgrade() {
local diskdev partdev diff
export_bootdevice && export_partdevice diskdev -2 || {
export_bootdevice && export_partdevice diskdev 0 || {
echo "Unable to determine upgrade device"
return 1
}
@ -72,10 +72,6 @@ platform_do_upgrade() {
#iterate over each partition from the image and write it to the boot disk
while read part start size; do
# root is /dev/sd[a|b]2 and not /dev/sd[a|b] this causes some problem
# one of which is this offset, I'm not sure what's the best fix, so
# here's a WA.
let part=$((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
@ -92,8 +88,7 @@ platform_do_upgrade() {
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/

2
target/linux/omap/base-files/lib/preinit/79_move_config
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@ -6,7 +6,7 @@ move_config() {
. /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 /

7
target/linux/omap/base-files/lib/upgrade/platform.sh
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@ -1,7 +1,7 @@
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
}
@ -28,7 +28,7 @@ platform_check_image() {
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
@ -38,7 +38,7 @@ platform_copy_config() {
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
}
@ -74,7 +74,6 @@ platform_do_upgrade() {
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

2
target/linux/sunxi/base-files/lib/preinit/79_move_config
Unescape Escape View File

@ -6,7 +6,7 @@ move_config() {
. /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 /

7
target/linux/sunxi/base-files/lib/upgrade/platform.sh
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@ -1,7 +1,7 @@
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
}
@ -28,7 +28,7 @@ platform_check_image() {
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
@ -38,7 +38,7 @@ platform_copy_config() {
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
}
@ -74,7 +74,6 @@ platform_do_upgrade() {
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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