From ad62247800a10654ab7a3d94ea9c6b43a834f301 Mon Sep 17 00:00:00 2001 From: Klaus Kudielka Date: Wed, 8 May 2019 20:40:50 +0200 Subject: base-files: improve lib/upgrade/common.sh 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= (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 Tested-by: Tomasz Maciej Nowak --- target/linux/omap/base-files/lib/preinit/79_move_config | 2 +- target/linux/omap/base-files/lib/upgrade/platform.sh | 7 +++---- 2 files changed, 4 insertions(+), 5 deletions(-) (limited to 'target/linux/omap') diff --git a/target/linux/omap/base-files/lib/preinit/79_move_config b/target/linux/omap/base-files/lib/preinit/79_move_config index c112588689..83171b3ba9 100644 --- a/target/linux/omap/base-files/lib/preinit/79_move_config +++ b/target/linux/omap/base-files/lib/preinit/79_move_config @@ -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/$partdev" /mnt; then if [ -f /mnt/sysupgrade.tgz ]; then mv -f /mnt/sysupgrade.tgz / diff --git a/target/linux/omap/base-files/lib/upgrade/platform.sh b/target/linux/omap/base-files/lib/upgrade/platform.sh index 88ef4790e9..abe910b154 100644 --- a/target/linux/omap/base-files/lib/upgrade/platform.sh +++ b/target/linux/omap/base-files/lib/upgrade/platform.sh @@ -1,7 +1,7 @@ platform_check_image() { local diskdev partdev diff - export_bootdevice && export_partdevice diskdev -2 || { + export_bootdevice && export_partdevice diskdev 0 || { echo "Unable to determine upgrade device" return 1 } @@ -28,7 +28,7 @@ platform_check_image() { platform_copy_config() { local partdev - if export_partdevice partdev -1; then + if export_partdevice partdev 1; then mount -t vfat -o rw,noatime "/dev/$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 -- cgit v1.2.3