contrib/dracut/90zfs/zfs-generator.sh.in

   1 #!/bin/bash
   2
   3 echo "zfs-generator: starting" >> /dev/kmsg
   4
   5 GENERATOR_DIR="$1"
   6 [ -n "$GENERATOR_DIR" ] || {
   7     echo "zfs-generator: no generator directory specified, exiting" >> /dev/kmsg
   8     exit 1
   9 }
  10
  11 [ -f /lib/dracut-lib.sh ] && dracutlib=/lib/dracut-lib.sh
  12 [ -f /usr/lib/dracut/modules.d/99base/dracut-lib.sh ] && dracutlib=/usr/lib/dracut/modules.d/99base/dracut-lib.sh
  13
  14 type getarg >/dev/null 2>&1 || {
  15     echo "zfs-generator: loading Dracut library from $dracutlib" >> /dev/kmsg
  16     . "$dracutlib"
  17 }
  18
  19 [ -z "$root" ]       && root=$(getarg root=)
  20 [ -z "$rootfstype" ] && rootfstype=$(getarg rootfstype=)
  21 [ -z "$rootflags" ]  && rootflags=$(getarg rootflags=)
  22
  23 # If root is not ZFS= or zfs: or rootfstype is not zfs
  24 # then we are not supposed to handle it.
  25 [ "${root##zfs:}" = "${root}" -a "${root##ZFS=}" = "${root}" -a "$rootfstype" != "zfs" ] && exit 0
  26 # If root is set to zfs:AUTO, then we are also not
  27 # supposed to handle it, and it should be handled
  28 # by the traditional Dracut mount hook.
  29 # See https://github.com/zfsonlinux/zfs/pull/4558#discussion_r61118952
  30 if [ "${root}" = "zfs:AUTO" ] ; then
  31   exit 0
  32 fi
  33
  34 rootfstype=zfs
  35 if echo "${rootflags}" | grep -Eq '^zfsutil$|^zfsutil,|,zfsutil$|,zfsutil,' ; then
  36     true
  37 elif test -n "${rootflags}" ; then
  38     rootflags="zfsutil,${rootflags}"
  39 else
  40     rootflags=zfsutil
  41 fi
  42
  43 root="${root##zfs:}"
  44 root="${root##ZFS=}"
  45
  46 echo "zfs-generator: writing extension for sysroot.mount to $GENERATOR_DIR"/sysroot.mount.d/zfs-enhancement.conf >> /dev/kmsg
  47
  48 [ -d "$GENERATOR_DIR" ] || mkdir "$GENERATOR_DIR"
  49 [ -d "$GENERATOR_DIR"/sysroot.mount.d ] || mkdir "$GENERATOR_DIR"/sysroot.mount.d
  50
  51 {
  52     echo "[Unit]"
  53     echo "Before=initrd-root-fs.target"
  54     echo "After=zfs-import-scan.service"
  55     echo "After=zfs-import-cache.service"
  56     echo "[Mount]"
  57     echo "What=${root}"
  58     echo "Type=${rootfstype}"
  59     echo "Options=${rootflags}"
  60 } > "$GENERATOR_DIR"/sysroot.mount.d/zfs-enhancement.conf
  61
  62 [ -d "$GENERATOR_DIR"/initrd-root-fs.target.requires ] || mkdir -p "$GENERATOR_DIR"/initrd-root-fs.target.requires
  63 ln -s ../sysroot.mount "$GENERATOR_DIR"/initrd-root-fs.target.requires/sysroot.mount
  64
  65 echo "zfs-generator: finished" >> /dev/kmsg