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Vendor import of openzfs master @ 184df27eef0abdc7ab2105b21257f753834b936b
[FreeBSD/FreeBSD.git] / contrib / dracut / 90zfs / zfs-generator.sh.in
1 #!/usr/bin/env 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 "$rootfstype" != "zfs" ] && exit 0
26
27 rootfstype=zfs
28 if echo "${rootflags}" | grep -Eq '^zfsutil$|^zfsutil,|,zfsutil$|,zfsutil,' ; then
29     true
30 elif test -n "${rootflags}" ; then
31     rootflags="zfsutil,${rootflags}"
32 else
33     rootflags=zfsutil
34 fi
35
36 echo "zfs-generator: writing extension for sysroot.mount to $GENERATOR_DIR"/sysroot.mount.d/zfs-enhancement.conf >> /dev/kmsg
37
38 [ -d "$GENERATOR_DIR" ] || mkdir "$GENERATOR_DIR"
39 [ -d "$GENERATOR_DIR"/sysroot.mount.d ] || mkdir "$GENERATOR_DIR"/sysroot.mount.d
40
41 {
42     echo "[Unit]"
43     echo "Before=initrd-root-fs.target"
44     echo "After=zfs-import.target"
45     echo "[Mount]"
46     if [ "${root}" = "zfs:AUTO" ] ; then
47       echo "PassEnvironment=BOOTFS"
48       echo 'What=${BOOTFS}'
49     else
50       root="${root##zfs:}"
51       root="${root##ZFS=}"
52       echo "What=${root}"
53     fi
54     echo "Type=${rootfstype}"
55     echo "Options=${rootflags}"
56 } > "$GENERATOR_DIR"/sysroot.mount.d/zfs-enhancement.conf
57
58 [ -d "$GENERATOR_DIR"/initrd-root-fs.target.requires ] || mkdir -p "$GENERATOR_DIR"/initrd-root-fs.target.requires
59 ln -s ../sysroot.mount "$GENERATOR_DIR"/initrd-root-fs.target.requires/sysroot.mount
60
61 echo "zfs-generator: finished" >> /dev/kmsg