modules.d/95virtfs/mount-virtfs.sh

   1 #!/bin/sh
   2 # -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
   3 # ex: ts=8 sw=4 sts=4 et filetype=sh
   4
   5 type getarg >/dev/null 2>&1 || . /lib/dracut-lib.sh
   6
   7 filter_rootopts() {
   8     rootopts=$1
   9     # strip ro and rw options
  10     local OLDIFS="$IFS"
  11     IFS=,
  12     set -- $rootopts
  13     IFS="$OLDIFS"
  14     local v
  15     while [ $# -gt 0 ]; do
  16         case $1 in
  17             rw|ro);;
  18             defaults);;
  19             *)
  20                 v="$v,${1}";;
  21         esac
  22         shift
  23     done
  24     rootopts=${v#,}
  25     echo $rootopts
  26 }
  27
  28 mount_root() {
  29     local _ret
  30
  31     rootfs="9p"
  32     rflags="trans=virtio,version=9p2000.L"
  33
  34     modprobe 9pnet_virtio
  35
  36     mount -t ${rootfs} -o "$rflags",ro "${root#virtfs:}" "$NEWROOT"
  37
  38     rootopts=
  39     if getargbool 1 rd.fstab -n rd_NO_FSTAB \
  40         && ! getarg rootflags \
  41         && [ -f "$NEWROOT/etc/fstab" ] \
  42         && ! [ -L "$NEWROOT/etc/fstab" ]; then
  43         # if $NEWROOT/etc/fstab contains special mount options for
  44         # the root filesystem,
  45         # remount it with the proper options
  46         rootopts="defaults"
  47         while read dev mp fs opts rest; do
  48             # skip comments
  49             [ "${dev%%#*}" != "$dev" ] && continue
  50
  51             if [ "$mp" = "/" ]; then
  52                 rootopts=$opts
  53                 break
  54             fi
  55         done < "$NEWROOT/etc/fstab"
  56
  57         rootopts=$(filter_rootopts $rootopts)
  58     fi
  59
  60     # we want rootflags (rflags) to take precedence so prepend rootopts to
  61     # them; rflags is guaranteed to not be empty
  62     rflags="${rootopts:+"${rootopts},"}${rflags}"
  63
  64     umount "$NEWROOT"
  65
  66     info "Remounting ${root#virtfs:} with -o ${rflags}"
  67     mount -t ${rootfs} -o "$rflags" "${root#virtfs:}" "$NEWROOT" 2>&1 | vinfo
  68
  69     [ -f "$NEWROOT"/forcefsck ] && rm -f "$NEWROOT"/forcefsck 2>/dev/null
  70     [ -f "$NEWROOT"/.autofsck ] && rm -f "$NEWROOT"/.autofsck 2>/dev/null
  71 }
  72
  73 if [ -n "$root" -a -z "${root%%virtfs:*}" ]; then
  74     mount_root
  75 fi
  76 :