1 files changed, 86 insertions, 0 deletions
diff --git a/contrib/dracut/90zfs/mount-zfs.sh.in b/contrib/dracut/90zfs/mount-zfs.sh.in
new file mode 100755
index 0000000000000..f5b3d9056c172
--- /dev/null
+++ b/contrib/dracut/90zfs/mount-zfs.sh.in
@@ -0,0 +1,86 @@
+#!/bin/bash
+
+. /lib/dracut-zfs-lib.sh
+
+ZFS_DATASET=""
+ZFS_POOL=""
+
+case "${root}" in
+	zfs:*) ;;
+	*) return ;;
+esac
+
+GENERATOR_FILE=/run/systemd/generator/sysroot.mount
+GENERATOR_EXTENSION=/run/systemd/generator/sysroot.mount.d/zfs-enhancement.conf
+
+if [ -e "$GENERATOR_FILE" ] && [ -e "$GENERATOR_EXTENSION" ] ; then
+	# If the ZFS sysroot.mount flag exists, the initial RAM disk configured
+	# it to mount ZFS on root.  In that case, we bail early.  This flag
+	# file gets created by the zfs-generator program upon successful run.
+	info "ZFS: There is a sysroot.mount and zfs-generator has extended it."
+	info "ZFS: Delegating root mount to sysroot.mount."
+	# Let us tell the initrd to run on shutdown.
+	# We have a shutdown hook to run
+	# because we imported the pool.
+	# We now prevent Dracut from running this thing again.
+	for zfsmounthook in "$hookdir"/mount/*zfs* ; do
+		if [ -f "$zfsmounthook" ] ; then
+			rm -f "$zfsmounthook"
+		fi
+	done
+	return
+fi
+info "ZFS: No sysroot.mount exists or zfs-generator did not extend it."
+info "ZFS: Mounting root with the traditional mount-zfs.sh instead."
+
+# Delay until all required block devices are present.
+modprobe zfs 2>/dev/null
+udevadm settle
+
+if [ "${root}" = "zfs:AUTO" ] ; then
+	ZFS_DATASET="$(find_bootfs)"
+	if [ $? -ne 0 ] ; then
+		zpool import -N -a ${ZPOOL_IMPORT_OPTS}
+		ZFS_DATASET="$(find_bootfs)"
+		if [ $? -ne 0 ] ; then
+			warn "ZFS: No bootfs attribute found in importable pools."
+			export_all -F
+
+			rootok=0
+			return 1
+		fi
+	fi
+	info "ZFS: Using ${ZFS_DATASET} as root."
+fi
+
+ZFS_DATASET="${ZFS_DATASET:-${root#zfs:}}"
+ZFS_POOL="${ZFS_DATASET%%/*}"
+
+if import_pool "${ZFS_POOL}" ; then
+	# Load keys if we can or if we need to
+	if [ $(zpool list -H -o feature@encryption $(echo "${ZFS_POOL}" | awk -F\/ '{print $1}')) = 'active' ]; then
+		# if the root dataset has encryption enabled
+		ENCRYPTIONROOT="$(zfs get -H -o value encryptionroot "${ZFS_DATASET}")"
+		if ! [ "${ENCRYPTIONROOT}" = "-" ]; then
+			KEYSTATUS="$(zfs get -H -o value keystatus "${ENCRYPTIONROOT}")"
+			# if the key needs to be loaded
+			if [ "$KEYSTATUS" = "unavailable" ]; then
+				# decrypt them
+				ask_for_password \
+					--tries 5 \
+					--prompt "Encrypted ZFS password for ${ENCRYPTIONROOT}: " \
+					--cmd "zfs load-key '${ENCRYPTIONROOT}'"
+			fi
+		fi
+	fi
+	# Let us tell the initrd to run on shutdown.
+	# We have a shutdown hook to run
+	# because we imported the pool.
+	info "ZFS: Mounting dataset ${ZFS_DATASET}..."
+	if mount_dataset "${ZFS_DATASET}" ; then
+		ROOTFS_MOUNTED=yes
+		return 0
+	fi
+fi
+
+rootok=0