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#
# Copyright (C) 2016 lede-project.org
#
# this can be used as a generic mmc upgrade script
# just add a device entry in platform.sh,
# define "kernelname" and "rootfsname" and call mmc_do_upgrade
# after the kernel and rootfs flash a loopdev (as overlay) is
# setup on top of the rootfs partition
# for the proper function a padded rootfs image is needed, basically
# append "pad-to 64k" to the image definition
# this is based on the ipq806x zyxel.sh mmc upgrade
. /lib/functions.sh
mmc_do_upgrade() {
local tar_file="$1"
local rootfs=
local kernel=
[ -z "$kernel" ] && kernel=$(find_mmc_part ${kernelname})
[ -z "$rootfs" ] && rootfs=$(find_mmc_part ${rootfsname})
[ -z "$kernel" ] && echo "Upgrade failed: kernel partition not found! Rebooting..." && reboot -f
[ -z "$rootfs" ] && echo "Upgrade failed: rootfs partition not found! Rebooting..." && reboot -f
mmc_do_flash $tar_file $kernel $rootfs
return 0
}
mmc_do_flash() {
local tar_file=$1
local kernel=$2
local rootfs=$3
# keep sure its unbound
losetup --detach-all || {
echo Failed to detach all loop devices. Skip this try.
reboot -f
}
# use the first found directory in the tar archive
local board_dir=$(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
}
# Cleanup
losetup -d $loopdev >/dev/null 2>&1
sync
umount -a
reboot -f
}
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