brcm2708: use x86's upgrade scripts for all rpi targets

Advantages:
 - preserves existing partition layout on the sd-card.
   Only the boot and rootfs partition will be overwritten.

Please note that sysupgrade will refuse to upgrade, if the existing
installation  has an incompatible partition layout. Future changes
to the bootfs and/or rootfs partition size will likely cause breakage
to the sysupgrade procedure. In these cases, the ext4-sdcard.img.gz
will have to be written to the sdcard manually.
Please don't forget to backup your configuration in this case.

Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
This commit is contained in:
Christian Lamparter 2017-12-17 15:18:49 +01:00 committed by Álvaro Fernández Rojas
parent 6f04128892
commit 246916ddf4

View file

@ -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
}