-USE_REFRESH=1
-
platform_check_image() {
- [ "$ARGC" -gt 1 ] && return 1
+ local diskdev partdev diff
+ [ "$#" -gt 1 ] && return 1
case "$(get_magic_word "$1")" in
- eb48) return 0;;
+ eb48|eb63) ;;
*)
echo "Invalid image type"
return 1
;;
esac
+
+ export_bootdevice && export_partdevice diskdev 0 || {
+ echo "Unable to determine upgrade device"
+ return 1
+ }
+
+ get_partitions "/dev/$diskdev" bootdisk
+
+ #extract the boot sector from the image
+ get_image "$@" | dd of=/tmp/image.bs count=1 bs=512b 2>/dev/null
+
+ get_partitions /tmp/image.bs image
+
+ #compare tables
+ diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)"
+
+ rm -f /tmp/image.bs /tmp/partmap.bootdisk /tmp/partmap.image
+
+ if [ -n "$diff" ]; then
+ echo "Partition layout has changed. Full image will be written."
+ ask_bool 0 "Abort" && exit 1
+ return 0
+ fi
}
-platform_do_upgrade() {
- sync
- get_image "$1" > /dev/hda
+platform_copy_config() {
+ local partdev
+
+ if export_partdevice partdev 1; then
+ mount -t ext4 -o rw,noatime "/dev/$partdev" /mnt
+ cp -af "$CONF_TAR" /mnt/
+ umount /mnt
+ fi
}
-x86_prepare_ext2() {
- # if we're running from ext2, we need to make sure that we have a mtd
- # partition that points to the active rootfs partition.
- # however this only matters if we actually need to preserve the config files
- [ "$SAVE_CONFIG" -eq 1 ] || return 0
- grep rootfs /proc/mtd >/dev/null || {
- echo /dev/hda2,65536,rootfs > /sys/module/block2mtd/parameters/block2mtd
+platform_do_upgrade() {
+ local diskdev partdev diff
+
+ export_bootdevice && export_partdevice diskdev 0 || {
+ echo "Unable to determine upgrade device"
+ return 1
}
+
+ sync
+
+ if [ "$UPGRADE_OPT_SAVE_PARTITIONS" = "1" ]; then
+ get_partitions "/dev/$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)"
+ else
+ diff=1
+ fi
+
+ if [ -n "$diff" ]; then
+ get_image "$@" | dd of="/dev/$diskdev" bs=4096 conv=fsync
+
+ # Separate removal and addtion is necessary; otherwise, partition 1
+ # will be missing if it overlaps with the old partition 2
+ partx -d - "/dev/$diskdev"
+ partx -a - "/dev/$diskdev"
+
+ 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
}
-append sysupgrade_pre_upgrade x86_prepare_ext2