sunxi: add sysupgrade support

[openwrt/staging/lynxis/omap.git] / target / linux / sunxi / base-files / lib / upgrade / platform.sh

diff --git a/target/linux/sunxi/base-files/lib/upgrade/platform.sh b/target/linux/sunxi/base-files/lib/upgrade/platform.sh
new file mode 100644 (file)
index 0000000..f2cd970
--- /dev/null
+++ b/target/linux/sunxi/base-files/lib/upgrade/platform.sh
@@ -0,0 +1,67 @@
+platform_check_image() {
+       true
+}
+
+platform_copy_config() {
+       local partdev
+
+       if export_partdevice partdev -1; then
+               mount -t vfat -o rw,noatime "/dev/$partdev" /mnt
+               cp -af "$CONF_TAR" /mnt/
+               umount /mnt
+       fi
+}
+
+platform_do_upgrade() {
+       local diskdev partdev ibs diff
+
+       if export_bootdevice && export_partdevice diskdev -2; then
+               sync
+               if [ "$SAVE_PARTITIONS" = "1" ]; then
+                       get_partitions "/dev/$diskdev" bootdisk
+
+                       #get block size
+                       if [ -f "/sys/block/$diskdev/queue/physical_block_size" ]; then
+                               ibs="$(cat "/sys/block/$diskdev/queue/physical_block_size")"
+                       else
+                               ibs=512
+                       fi
+
+                       #extract the boot sector from the image
+                       get_image "$@" | 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
+
+                       #write uboot image
+                       get_image "$@" | dd of="$diskdev" bs=1024 skip=8 seek=8 conv=notrunc
+                       #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="$ibs" obs=1M skip="$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
+}