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-rw-r--r--target/linux/brcm2708/base-files/lib/upgrade/platform.sh102
1 files changed, 93 insertions, 9 deletions
diff --git a/target/linux/brcm2708/base-files/lib/upgrade/platform.sh b/target/linux/brcm2708/base-files/lib/upgrade/platform.sh
index 5b8e1e15b3..b9cd8d282f 100644
--- a/target/linux/brcm2708/base-files/lib/upgrade/platform.sh
+++ b/target/linux/brcm2708/base-files/lib/upgrade/platform.sh
@@ -1,20 +1,104 @@
+. /lib/functions.sh
+
REQUIRE_IMAGE_METADATA=1
+# copied from x86's platform.sh
+
platform_check_image() {
- return 0
+ local diskdev partdev diff
+
+ [ "$#" -gt 1 ] && return 1
+
+ export_bootdevice && export_partdevice diskdev -2 || {
+ echo "Unable to determine upgrade device"
+ return 1
+ }
+
+ get_partitions "/dev/$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
+
+ return 0;
}
platform_do_upgrade() {
+ local diskdev partdev diff
+
+ export_bootdevice && export_partdevice diskdev -2 || {
+ echo "Unable to determine upgrade device"
+ return 1
+ }
+
sync
- get_image "$1" | dd of=/dev/mmcblk0 bs=2M conv=fsync
- sleep 1
+
+ if [ "$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="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)"
+ else
+ diff=1
+ fi
+
+ if [ -n "$diff" ]; then
+ get_image "$@" | dd of="/dev/$diskdev" bs=2M 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
+ # 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
+ 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
}
platform_copy_config() {
- mkdir -p /boot
- [ -f /boot/kernel.img ] || mount -t vfat -o rw,noatime /dev/mmcblk0p1 /boot
- cp -af "$CONF_TAR" /boot/
- tar --directory / -xvf "$CONF_TAR" boot/config.txt
- sync
- umount /boot
+ local partdev
+
+ # Same as above /dev/sd[a|b]2 is root, so /boot is -1
+ 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/
+ tar --directory / -xvf "$CONF_TAR" boot/config.txt
+ sync
+ unmount /boot
+ fi
}