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 PATH=$BUSYBOX_PATH:$VTOY_PATH/tool:$PATH
  23
  24 wait_for_usb_disk_ready
  25
  26 vtdiskname=$(get_ventoy_disk_name)
  27 if [ "$vtdiskname" = "unknown" ]; then
  28     vtlog "ventoy disk not found"
  29     PATH=$VTPATH_OLD
  30     exit 0
  31 fi
  32
  33 #
  34 # longpanda:
  35 # Alpine initramfs doesn't contain dm-mod or fuse module,
  36 # and even the worse, the libpthread.so is not included too.
  37 # So here we directly dump the modloop squashfs file from disk to rootfs.
  38 # Fortunately, this file is not too big (< 100MB in alpine 3.11.3).
  39 # After that:
  40 #   1. mount the squashfs file
  41 #   2. find the dm-mod module from the mountpoint and insmod
  42 #   3. unmount and delete the squashfs file
  43 #
  44
  45 MDEV="${vtdiskname#/dev/}2"
  46
  47 vtoydm -i -f $VTOY_PATH/ventoy_image_map -d /dev/${MDEV:0:-1} > $VTOY_PATH/iso_file_list
  48
  49 vtLine=$(grep '[-][-] modloop-lts ' $VTOY_PATH/iso_file_list)
  50 sector=$(echo $vtLine | awk '{print $(NF-1)}')
  51 length=$(echo $vtLine | awk '{print $NF}')
  52
  53 echo -n "Mounting boot media, please wait ......"
  54 vtoydm -e -f $VTOY_PATH/ventoy_image_map -d /dev/${MDEV:0:-1} -s $sector -l $length -o /vt_modloop
  55 echo "done"
  56
  57 mkdir -p $VTOY_PATH/mnt
  58 mount /vt_modloop $VTOY_PATH/mnt
  59
  60 KoModPath=$(find $VTOY_PATH/mnt/ -name 'dm-mod.ko*')
  61 vtlog "KoModPath=$KoModPath"
  62
  63 if modinfo $KoModPath | grep -q 'depend.*dax'; then
  64     vtlog "First install dax mod ..."
  65     DaxModPath=$(echo $KoModPath | sed 's#md/dm-mod#dax/dax#')
  66     vtlog "insmod $DaxModPath"
  67     insmod $DaxModPath
  68 fi
  69
  70 insmod $KoModPath
  71
  72 umount $VTOY_PATH/mnt
  73 rm -f /vt_modloop
  74
  75 ventoy_udev_disk_common_hook "$MDEV" "noreplace"
  76
  77 # OK finish
  78 set_ventoy_hook_finish