IMG/cpio/ventoy/hook/alpine/udev_disk_hook.sh

   1 #!/ventoy/busybox/sh
   2 #************************************************************************************
   3 # Copyright (c) 2020, longpanda <admin@ventoy.net>
   4 #
   5 # This program is free software; you can redistribute it and/or
   6 # modify it under the terms of the GNU General Public License as
   7 # published by the Free Software Foundation; either version 3 of the
   8 # License, or (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful, but
  11 # WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 # General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program; if not, see <http://www.gnu.org/licenses/>.
  17 #
  18 #************************************************************************************
  19
  20 . /ventoy/hook/ventoy-hook-lib.sh
  21
  22 if [ "$SUBSYSTEM" != "block" ] || [ "$DEVTYPE" != "partition" ]; then
  23     exit 0
  24 fi
  25
  26 if [ -b /dev/${MDEV:0:-1} ]; then
  27     vtlog "/dev/${MDEV:0:-1} exist"
  28 else
  29     $SLEEP 2
  30 fi
  31
  32 if is_ventoy_hook_finished || not_ventoy_disk "${MDEV:0:-1}"; then
  33     exit 0
  34 fi
  35
  36 PATH=$BUSYBOX_PATH:$VTOY_PATH/tool:$PATH
  37
  38 #
  39 # longpanda:
  40 # Alpine initramfs doesn't contain dm-mod or fuse module,
  41 # and even the worse, the libpthread.so is not included too.
  42 # So here we directly dump the modloop squashfs file from disk to rootfs.
  43 # Fortunately, this file is not too big (< 100MB in alpine 3.11.3).
  44 # After that:
  45 #   1. mount the squashfs file
  46 #   2. find the dm-mod module from the mountpoint and insmod
  47 #   3. unmount and delete the squashfs file
  48 #
  49
  50 vtoydm -i -f $VTOY_PATH/ventoy_image_map -d /dev/${MDEV:0:-1} > $VTOY_PATH/iso_file_list
  51
  52 vtLine=$(grep '[-][-] modloop-lts ' $VTOY_PATH/iso_file_list)
  53 sector=$(echo $vtLine | awk '{print $(NF-1)}')
  54 length=$(echo $vtLine | awk '{print $NF}')
  55
  56 vtoydm -e -f $VTOY_PATH/ventoy_image_map -d /dev/${MDEV:0:-1} -s $sector -l $length -o /vt_modloop
  57
  58 mkdir -p $VTOY_PATH/mnt
  59 mount /vt_modloop $VTOY_PATH/mnt
  60
  61 KoModPath=$(find $VTOY_PATH/mnt/ -name 'dm-mod.ko*')
  62 vtlog "insmod $KoModPath"
  63 insmod $KoModPath
  64
  65 umount $VTOY_PATH/mnt
  66 rm -f /vt_modloop
  67
  68 ventoy_udev_disk_common_hook "$MDEV" "noreplace"
  69
  70 # OK finish
  71 set_ventoy_hook_finish