b02c381b4b
Even when the disk uses 4k blocks, the partition table still uses units of 512 byte sectors. Always use ibs=512 for the offsets Signed-off-by: Felix Fietkau <nbd@nbd.name>
65 lines
1.6 KiB
Bash
65 lines
1.6 KiB
Bash
platform_check_image() {
|
|
[ "$#" -gt 1 ] && return 1
|
|
|
|
case "$(get_magic_word "$1")" in
|
|
eb48|eb63) return 0;;
|
|
*)
|
|
echo "Invalid image type"
|
|
return 1
|
|
;;
|
|
esac
|
|
}
|
|
|
|
platform_copy_config() {
|
|
local partdev
|
|
|
|
if export_partdevice partdev 1; then
|
|
mount -t ext4 -o rw,noatime "/dev/$partdev" /mnt
|
|
cp -af "$CONF_TAR" /mnt/
|
|
umount /mnt
|
|
fi
|
|
}
|
|
|
|
platform_do_upgrade() {
|
|
local diskdev partdev diff
|
|
|
|
if export_bootdevice && export_partdevice diskdev 0; then
|
|
sync
|
|
if [ "$SAVE_PARTITIONS" = "1" ]; then
|
|
get_partitions "/dev/$diskdev" bootdisk
|
|
|
|
#extract the boot sector from the image
|
|
get_image "$@" | dd of=/tmp/image.bs count=1 bs=512b
|
|
|
|
get_partitions /tmp/image.bs image
|
|
|
|
#compare tables
|
|
diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)"
|
|
if [ -n "$diff" ]; then
|
|
echo "Partition layout is changed. Full image will be written."
|
|
ask_bool 0 "Abort" && exit
|
|
|
|
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
|
|
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
|
|
else
|
|
echo "Unable to find partition $part device, skipped."
|
|
fi
|
|
done < /tmp/partmap.image
|
|
|
|
#copy partition uuid
|
|
echo "Writing new UUID to /dev/$diskdev..."
|
|
get_image "$@" | dd of="/dev/$diskdev" bs=1 skip=440 count=4 seek=440 conv=fsync
|
|
else
|
|
get_image "$@" | dd of="/dev/$diskdev" bs=4096 conv=fsync
|
|
fi
|
|
|
|
sleep 1
|
|
fi
|
|
}
|