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#
# Copyright (C) 2016 lede-project.org
#
zyxel_get_rootfs() {
local rootfsdev
if read cmdline < /proc/cmdline; then
case "$cmdline" in
*root=*)
rootfsdev="${cmdline##*root=}"
rootfsdev="${rootfsdev%% *}"
;;
esac
echo "${rootfsdev}"
fi
}
zyxel_do_flash() {
local tar_file=$1
local kernel=$2
local rootfs=$3
local dualflagmtd=$4
# keep sure its unbound
losetup --detach-all || {
echo Failed to detach all loop devices. Skip this try.
reboot -f
}
# use the first found directory in the tar archive
local board_dir=$(tar tf $tar_file | grep -m 1 '^sysupgrade-.*/$')
board_dir=${board_dir%/}
echo "flashing kernel to $kernel"
tar xf $tar_file ${board_dir}/kernel -O >$kernel
echo "flashing rootfs to ${rootfs}"
tar xf $tar_file ${board_dir}/root -O >"${rootfs}"
# a padded rootfs is needed for overlay fs creation
local offset=$(tar xf $tar_file ${board_dir}/root -O | wc -c)
[ $offset -lt 65536 ] && {
echo Wrong size for rootfs: $offset
sleep 10
reboot -f
}
# Mount loop for rootfs_data
local loopdev="$(losetup -f)"
losetup -o $offset $loopdev $rootfs || {
echo "Failed to mount looped rootfs_data."
sleep 10
reboot -f
}
echo "Format new rootfs_data at position ${offset}."
mkfs.ext4 -F -L rootfs_data $loopdev
mkdir /tmp/new_root
mount -t ext4 $loopdev /tmp/new_root && {
echo "Saving config to rootfs_data at position ${offset}."
cp -v "$UPGRADE_BACKUP" "/tmp/new_root/$BACKUP_FILE"
umount /tmp/new_root
}
# flashing successful, toggle the dualflag
case "$rootfs" in
"/dev/mmcblk0p5")
printf "\xff" >$dualflagmtd
;;
"/dev/mmcblk0p8")
printf "\x01" >$dualflagmtd
;;
esac
# Cleanup
losetup -d $loopdev >/dev/null 2>&1
sync
umount -a
reboot -f
}
zyxel_do_upgrade() {
local tar_file="$1"
local board=$(board_name)
local rootfs="$(zyxel_get_rootfs)"
local kernel=
[ -b "${rootfs}" ] || return 1
case "$board" in
zyxel,nbg6817)
local dualflagmtd="$(find_mtd_part 0:DUAL_FLAG)"
[ -b $dualflagmtd ] || return 1
case "$rootfs" in
"/dev/mmcblk0p5")
# booted from the primary partition set
# write to the alternative set
kernel="/dev/mmcblk0p7"
rootfs="/dev/mmcblk0p8"
;;
"/dev/mmcblk0p8")
# booted from the alternative partition set
# write to the primary set
kernel="/dev/mmcblk0p4"
rootfs="/dev/mmcblk0p5"
;;
*)
return 1
;;
esac
;;
*)
return 1
;;
esac
zyxel_do_flash $tar_file $kernel $rootfs $dualflagmtd
return 0
}
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