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#!/bin/sh
# shellcheck disable=SC2016,SC1004
grep -wq debug /proc/cmdline && debug=1
[ -n "$debug" ] && echo "zfs-generator: starting" >> /dev/kmsg
GENERATOR_DIR="$1"
[ -n "$GENERATOR_DIR" ] || {
echo "zfs-generator: no generator directory specified, exiting" >> /dev/kmsg
exit 1
}
[ -f /lib/dracut-lib.sh ] && dracutlib=/lib/dracut-lib.sh
[ -f /usr/lib/dracut/modules.d/99base/dracut-lib.sh ] && dracutlib=/usr/lib/dracut/modules.d/99base/dracut-lib.sh
command -v getarg >/dev/null 2>&1 || {
[ -n "$debug" ] && echo "zfs-generator: loading Dracut library from $dracutlib" >> /dev/kmsg
. "$dracutlib"
}
. /lib/dracut-zfs-lib.sh
[ -z "$root" ] && root=$(getarg root=)
[ -z "$rootfstype" ] && rootfstype=$(getarg rootfstype=)
[ -z "$rootflags" ] && rootflags=$(getarg rootflags=)
# If root is not ZFS= or zfs: or rootfstype is not zfs
# then we are not supposed to handle it.
[ "${root##zfs:}" = "${root}" ] &&
[ "${root##ZFS=}" = "${root}" ] &&
[ "$rootfstype" != "zfs" ] &&
exit 0
case ",${rootflags}," in
*,zfsutil,*) ;;
,,) rootflags=zfsutil ;;
*) rootflags="zfsutil,${rootflags}" ;;
esac
if [ "${root}" != "zfs:AUTO" ]; then
root="${root##zfs:}"
root="${root##ZFS=}"
fi
[ -n "$debug" ] && echo "zfs-generator: writing extension for sysroot.mount to $GENERATOR_DIR/sysroot.mount.d/zfs-enhancement.conf" >> /dev/kmsg
mkdir -p "$GENERATOR_DIR"/sysroot.mount.d "$GENERATOR_DIR"/initrd-root-fs.target.requires "$GENERATOR_DIR"/dracut-pre-mount.service.d
{
echo "[Unit]"
echo "Before=initrd-root-fs.target"
echo "After=zfs-import.target"
echo
echo "[Mount]"
if [ "${root}" = "zfs:AUTO" ]; then
echo "PassEnvironment=BOOTFS"
echo 'What=${BOOTFS}'
else
echo "What=${root}"
fi
echo "Type=zfs"
echo "Options=${rootflags}"
} > "$GENERATOR_DIR"/sysroot.mount.d/zfs-enhancement.conf
ln -fs ../sysroot.mount "$GENERATOR_DIR"/initrd-root-fs.target.requires/sysroot.mount
if [ "${root}" = "zfs:AUTO" ]; then
{
echo "[Unit]"
echo "Before=initrd-root-fs.target"
echo "After=sysroot.mount"
echo "DefaultDependencies=no"
echo
echo "[Service]"
echo "Type=oneshot"
echo "PassEnvironment=BOOTFS"
echo "ExecStart=/bin/sh -c '" ' \
. /lib/dracut-zfs-lib.sh; \
_zfs_nonroot_necessities_cb() { \
zfs mount | grep -m1 -q "^$1 " && return 0; \
echo "Mounting $1 on /sysroot$2"; \
mount -o zfsutil -t zfs "$1" "/sysroot$2"; \
}; \
for_relevant_root_children "${BOOTFS}" _zfs_nonroot_necessities_cb;' \
"'"
} > "$GENERATOR_DIR"/zfs-nonroot-necessities.service
ln -fs ../zfs-nonroot-necessities.service "$GENERATOR_DIR"/initrd-root-fs.target.requires/zfs-nonroot-necessities.service
else
# We can solve this statically at generation time, so do!
_zfs_generator_cb() {
dset="${1}"
mpnt="${2}"
unit="sysroot$(echo "$mpnt" | sed 's;/;-;g').mount"
{
echo "[Unit]"
echo "Before=initrd-root-fs.target"
echo "After=sysroot.mount"
echo
echo "[Mount]"
echo "Where=/sysroot${mpnt}"
echo "What=${dset}"
echo "Type=zfs"
echo "Options=zfsutil"
} > "$GENERATOR_DIR/${unit}"
ln -fs ../"${unit}" "$GENERATOR_DIR"/initrd-root-fs.target.requires/"${unit}"
}
for_relevant_root_children "${root}" _zfs_generator_cb
fi
{
echo "[Unit]"
echo "After=zfs-import.target"
} > "$GENERATOR_DIR"/dracut-pre-mount.service.d/zfs-enhancement.conf
[ -n "$debug" ] && echo "zfs-generator: finished" >> /dev/kmsg
exit 0
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