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 board=$2
  23         local kernel=$3
  24         local rootfs=$4
  25
  26         # keep sure its unbound
  27         losetup --detach-all || {
  28                 echo Failed to detach all loop devices. Skip this try.
  29                 reboot -f
  30         }
  31
  32         echo "flashing kernel to /dev/${kernel}"
  33         tar xf $tar_file sysupgrade-$board/kernel -O >/dev/$kernel
  34
  35         echo "flashing rootfs to ${rootfs}"
  36         tar xf $tar_file sysupgrade-$board/root -O >"${rootfs}"
  37
  38         # a padded rootfs is needed for overlay fs creation
  39         local offset=$(tar xf $tar_file sysupgrade-$board/root -O | wc -c)
  40         [ $offset -lt 65536 ] && {
  41                 echo Wrong size for rootfs: $offset
  42                 sleep 10
  43                 reboot -f
  44         }
  45
  46         # Mount loop for rootfs_data
  47         losetup -o $offset /dev/loop0 "${rootfs}" || {
  48                 echo "Failed to mount looped rootfs_data."
  49                 sleep 10
  50                 reboot -f
  51         }
  52
  53         echo "Format new rootfs_data at position ${offset}."
  54         mkfs.ext4 -F -L rootfs_data /dev/loop0
  55         mkdir /tmp/new_root
  56         mount -t ext4 /dev/loop0 /tmp/new_root && {
  57                 echo "Saving config to rootfs_data at position ${offset}."
  58                 cp -v /tmp/sysupgrade.tgz /tmp/new_root/
  59                 umount /tmp/new_root
  60         }
  61
  62         # Cleanup
  63         losetup -d /dev/loop0 >/dev/null 2>&1
  64         sync
  65         umount -a
  66         reboot -f
  67 }
  68
  69 zyxel_do_upgrade() {
  70         local tar_file="$1"
  71         local board=$(board_name)
  72         local rootfs="$(zyxel_get_rootfs)"
  73         local kernel=
  74
  75         [ -b "${rootfs}" ] || return 1
  76         case "$board" in
  77         zyxel,nbg6817)
  78                 case "$rootfs" in
  79                         "/dev/mmcblk0p5")
  80                                 kernel=mmcblk0p4
  81                         ;;
  82                         "/dev/mmcblk0p8")
  83                                 kernel=mmcblk0p7
  84                         ;;
  85                         *)
  86                                 return 1
  87                         ;;
  88                 esac
  89                 ;;
  90         *)
  91                 return 1
  92                 ;;
  93         esac
  94
  95         zyxel_do_flash $tar_file $board $kernel $rootfs
  96
  97         return 0
  98 }