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

   1 #!/bin/sh
   2 # shellcheck disable=SC2016,SC1004,SC2154
   3
   4 grep -wq debug /proc/cmdline && debug=1
   5 [ -n "$debug" ] && echo "zfs-generator: starting" >> /dev/kmsg
   6
   7 GENERATOR_DIR="$1"
   8 [ -n "$GENERATOR_DIR" ] || {
   9     echo "zfs-generator: no generator directory specified, exiting" >> /dev/kmsg
  10     exit 1
  11 }
  12
  13 # shellcheck source=zfs-lib.sh.in
  14 . /lib/dracut-zfs-lib.sh
  15 decode_root_args || exit 0
  16
  17 [ -z "${rootflags}" ] && rootflags=$(getarg rootflags=)
  18 case ",${rootflags}," in
  19         *,zfsutil,*) ;;
  20         ,,)     rootflags=zfsutil ;;
  21         *)      rootflags="zfsutil,${rootflags}" ;;
  22 esac
  23
  24 [ -n "$debug" ] && echo "zfs-generator: writing extension for sysroot.mount to $GENERATOR_DIR/sysroot.mount.d/zfs-enhancement.conf" >> /dev/kmsg
  25
  26
  27 mkdir -p "$GENERATOR_DIR"/sysroot.mount.d "$GENERATOR_DIR"/initrd-root-fs.target.requires "$GENERATOR_DIR"/dracut-pre-mount.service.d
  28 {
  29     echo "[Unit]"
  30     echo "Before=initrd-root-fs.target"
  31     echo "After=zfs-import.target"
  32     echo
  33     echo "[Mount]"
  34     if [ "${root}" = "zfs:AUTO" ]; then
  35       echo "PassEnvironment=BOOTFS"
  36       echo 'What=${BOOTFS}'
  37     else
  38       echo "What=${root}"
  39     fi
  40     echo "Type=zfs"
  41     echo "Options=${rootflags}"
  42 } > "$GENERATOR_DIR"/sysroot.mount.d/zfs-enhancement.conf
  43 ln -fs ../sysroot.mount "$GENERATOR_DIR"/initrd-root-fs.target.requires/sysroot.mount
  44
  45
  46 if [ "${root}" = "zfs:AUTO" ]; then
  47   {
  48       echo "[Unit]"
  49       echo "Before=initrd-root-fs.target"
  50       echo "After=sysroot.mount"
  51       echo "DefaultDependencies=no"
  52       echo
  53       echo "[Service]"
  54       echo "Type=oneshot"
  55       echo "PassEnvironment=BOOTFS"
  56       echo "ExecStart=/bin/sh -c '" '                                        \
  57         . /lib/dracut-zfs-lib.sh;                                            \
  58         _zfs_nonroot_necessities_cb() {                                      \
  59             zfs mount | grep -m1 -q "^$1 " && return 0;                      \
  60             echo "Mounting $1 on /sysroot$2";                                \
  61             mount -o zfsutil -t zfs "$1" "/sysroot$2";                       \
  62         };                                                                   \
  63         for_relevant_root_children "${BOOTFS}" _zfs_nonroot_necessities_cb;' \
  64       "'"
  65   } > "$GENERATOR_DIR"/zfs-nonroot-necessities.service
  66   ln -fs ../zfs-nonroot-necessities.service "$GENERATOR_DIR"/initrd-root-fs.target.requires/zfs-nonroot-necessities.service
  67 else
  68   # We can solve this statically at generation time, so do!
  69   _zfs_generator_cb() {
  70       dset="${1}"
  71       mpnt="${2}"
  72       unit="$(systemd-escape --suffix=mount -p "/sysroot${mpnt}")"
  73
  74       {
  75           echo "[Unit]"
  76           echo "Before=initrd-root-fs.target"
  77           echo "After=sysroot.mount"
  78           echo
  79           echo "[Mount]"
  80           echo "Where=/sysroot${mpnt}"
  81           echo "What=${dset}"
  82           echo "Type=zfs"
  83           echo "Options=zfsutil"
  84       } > "$GENERATOR_DIR/${unit}"
  85       ln -fs ../"${unit}" "$GENERATOR_DIR"/initrd-root-fs.target.requires/"${unit}"
  86   }
  87
  88   for_relevant_root_children "${root}" _zfs_generator_cb
  89 fi
  90
  91
  92 {
  93     echo "[Unit]"
  94     echo "After=zfs-import.target"
  95 } > "$GENERATOR_DIR"/dracut-pre-mount.service.d/zfs-enhancement.conf
  96
  97 [ -n "$debug" ] && echo "zfs-generator: finished" >> /dev/kmsg
  98
  99 exit 0