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         local dualflagmtd=$4
  25
  26         # keep sure its unbound
  27         losetup --detach-all || {
  28                 echo Failed to detach all loop devices. Skip this try.
  29                 reboot -f
  30         }
  31
  32         # use the first found directory in the tar archive
  33         local board_dir=$(tar tf $tar_file | grep -m 1 '^sysupgrade-.*/$')
  34         board_dir=${board_dir%/}
  35
  36         echo "flashing kernel to $kernel"
  37         tar xf $tar_file ${board_dir}/kernel -O >$kernel
  38
  39         echo "flashing rootfs to ${rootfs}"
  40         tar xf $tar_file ${board_dir}/root -O >"${rootfs}"
  41
  42         # a padded rootfs is needed for overlay fs creation
  43         local offset=$(tar xf $tar_file ${board_dir}/root -O | wc -c)
  44         [ $offset -lt 65536 ] && {
  45                 echo Wrong size for rootfs: $offset
  46                 sleep 10
  47                 reboot -f
  48         }
  49
  50         # Mount loop for rootfs_data
  51         local loopdev="$(losetup -f)"
  52         losetup -o $offset $loopdev $rootfs || {
  53                 echo "Failed to mount looped rootfs_data."
  54                 sleep 10
  55                 reboot -f
  56         }
  57
  58         echo "Format new rootfs_data at position ${offset}."
  59         mkfs.ext4 -F -L rootfs_data $loopdev
  60         mkdir /tmp/new_root
  61         mount -t ext4 $loopdev /tmp/new_root && {
  62                 echo "Saving config to rootfs_data at position ${offset}."
  63                 cp -v "$UPGRADE_BACKUP" "/tmp/new_root/$BACKUP_FILE"
  64                 umount /tmp/new_root
  65         }
  66
  67         # flashing successful, toggle the dualflag
  68         case "$rootfs" in
  69                 "/dev/mmcblk0p5")
  70                         printf "\xff" >$dualflagmtd
  71                         ;;
  72                 "/dev/mmcblk0p8")
  73                         printf "\x01" >$dualflagmtd
  74                         ;;
  75         esac
  76
  77         # Cleanup
  78         losetup -d $loopdev >/dev/null 2>&1
  79         sync
  80         umount -a
  81         reboot -f
  82 }
  83
  84 zyxel_do_upgrade() {
  85         local tar_file="$1"
  86         local board=$(board_name)
  87         local rootfs="$(zyxel_get_rootfs)"
  88         local kernel=
  89
  90         [ -b "${rootfs}" ] || return 1
  91         case "$board" in
  92         zyxel,nbg6817)
  93                 local dualflagmtd="$(find_mtd_part 0:dual_flag)"
  94                 # XXX: drop upper case after kernel v5.4 is gone (qcom-smem)
  95                 [ -b $dualflagmtd ] || \
  96                         dualflagmtd="$(find_mtd_part 0:DUAL_FLAG)"
  97                 [ -b $dualflagmtd ] || return 1
  98
  99                 case "$rootfs" in
 100                         "/dev/mmcblk0p5")
 101                                 # booted from the primary partition set
 102                                 # write to the alternative set
 103                                 kernel="/dev/mmcblk0p7"
 104                                 rootfs="/dev/mmcblk0p8"
 105                         ;;
 106                         "/dev/mmcblk0p8")
 107                                 # booted from the alternative partition set
 108                                 # write to the primary set
 109                                 kernel="/dev/mmcblk0p4"
 110                                 rootfs="/dev/mmcblk0p5"
 111                         ;;
 112                         *)
 113                                 return 1
 114                         ;;
 115                 esac
 116                 ;;
 117         *)
 118                 return 1
 119                 ;;
 120         esac
 121
 122         zyxel_do_flash $tar_file $kernel $rootfs $dualflagmtd
 123
 124         nand_do_upgrade "$1"
 125
 126         return 0
 127 }