target/linux/mediatek/filogic/base-files/lib/preinit/75_rootfs_prepare

   1 # SPDX-License-Identifier: GPL-2.0-or-later OR BSD-2-Clause
   2
   3 rootfs_create() {
   4         local blocks
   5
   6         blocks=$(cat /sys/class/ubi/ubi0/avail_eraseblocks)
   7         [ -z "$blocks" ] && {
   8                 echo "Failed to read amount of available erase blocks" >&2
   9                 return
  10         }
  11
  12         # Delete after getting available blocks: Make sure enough space is
  13         # left to recreate these volumes.
  14         ubirmvol /dev/ubi0 -N kernel_backup
  15         ubirmvol /dev/ubi0 -N rootfs_backup
  16
  17         # Use 90% of remaining flash size for "rootfs_data"
  18         ubimkvol /dev/ubi0 -n 20 -N rootfs_data --lebs $((blocks / 100 * 90))
  19         mknod -m 0600 /dev/ubi0_20 c 250 21
  20 }
  21
  22 rootfs_prepare() {
  23         case $(board_name) in
  24         netgear,wax220)
  25                 if ! ubinfo /dev/ubi0 -N rootfs_data &>/dev/null; then
  26                         echo "Creating \"rootfs_data\" UBI volume"
  27                         rootfs_create
  28                 fi
  29                 ;;
  30         *)
  31                 ;;
  32         esac
  33 }
  34
  35 boot_hook_add preinit_main rootfs_prepare