target/linux/ipq806x/base-files/lib/upgrade/zyxel.sh

   1 #
   2 # Copyright (C) 2016 lede-project.org
   3 #
   4
   5 zyxel_get_rootfs() {
   6         local rootfsdev
   7
   8         if read cmdline < /proc/cmdline; then
   9                 case "$cmdline" in
  10                         *root=*)
  11                                 rootfsdev="${cmdline##*root=}"
  12                                 rootfsdev="${rootfsdev%% *}"
  13                         ;;
  14                 esac
  15
  16                 echo "${rootfsdev}"
  17         fi
  18 }
  19
  20 zyxel_do_flash() {
  21         local tar_file=$1
  22         local kernel=$2
  23         local rootfs=$3
  24
  25         # keep sure its unbound
  26         losetup --detach-all || {
  27                 echo Failed to detach all loop devices. Skip this try.
  28                 reboot -f
  29         }
  30
  31         # use the first found directory in the tar archive
  32         local board_dir=$(tar tf $tar_file | grep -m 1 '^sysupgrade-.*/$')
  33         board_dir=${board_dir%/}
  34
  35         echo "flashing kernel to $kernel"
  36         tar xf $tar_file ${board_dir}/kernel -O >$kernel
  37
  38         echo "flashing rootfs to ${rootfs}"
  39         tar xf $tar_file ${board_dir}/root -O >"${rootfs}"
  40
  41         # a padded rootfs is needed for overlay fs creation
  42         local offset=$(tar xf $tar_file ${board_dir}/root -O | wc -c)
  43         [ $offset -lt 65536 ] && {
  44                 echo Wrong size for rootfs: $offset
  45                 sleep 10
  46                 reboot -f
  47         }
  48
  49         # Mount loop for rootfs_data
  50         local loopdev="$(losetup -f)"
  51         losetup -o $offset $loopdev $rootfs || {
  52                 echo "Failed to mount looped rootfs_data."
  53                 sleep 10
  54                 reboot -f
  55         }
  56
  57         echo "Format new rootfs_data at position ${offset}."
  58         mkfs.ext4 -F -L rootfs_data $loopdev
  59         mkdir /tmp/new_root
  60         mount -t ext4 $loopdev /tmp/new_root && {
  61                 echo "Saving config to rootfs_data at position ${offset}."
  62                 cp -v /tmp/sysupgrade.tgz /tmp/new_root/
  63                 umount /tmp/new_root
  64         }
  65
  66         # Cleanup
  67         losetup -d $loopdev >/dev/null 2>&1
  68         sync
  69         umount -a
  70         reboot -f
  71 }
  72
  73 zyxel_do_upgrade() {
  74         local tar_file="$1"
  75         local board=$(board_name)
  76         local rootfs="$(zyxel_get_rootfs)"
  77         local kernel=
  78
  79         [ -b "${rootfs}" ] || return 1
  80         case "$board" in
  81         zyxel,nbg6817)
  82                 case "$rootfs" in
  83                         "/dev/mmcblk0p5")
  84                                 kernel="/dev/mmcblk0p4"
  85                         ;;
  86                         "/dev/mmcblk0p8")
  87                                 kernel="/dev/mmcblk0p7"
  88                         ;;
  89                         *)
  90                                 return 1
  91                         ;;
  92                 esac
  93                 ;;
  94         *)
  95                 return 1
  96                 ;;
  97         esac
  98
  99         zyxel_do_flash $tar_file $kernel $rootfs
 100
 101         return 0
 102 }