OpenZFS 8592 - ZFS channel programs - rollback

Authored by: Brad Lewis <[email protected]>
Reviewed by: Chris Williamson <[email protected]>
Reviewed by: Matthew Ahrens <[email protected]>
Approved by: Robert Mustacchi <[email protected]>
Ported-by: Don Brady <[email protected]>

ZFS channel programs should be able to perform a rollback.

OpenZFS-issue: https://www.illumos.org/issues/8592
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/d46b5ed6

3 files changed, 115 insertions, 1 deletions

diff --git a/tests/zfs-tests/tests/functional/channel_program/synctask_core/Makefile.am b/tests/zfs-tests/tests/functional/channel_program/synctask_core/Makefile.am
index cd347472c..29bd68eee 100644
--- a/tests/zfs-tests/tests/functional/channel_program/synctask_core/Makefile.am
+++ b/tests/zfs-tests/tests/functional/channel_program/synctask_core/Makefile.am
@@ -27,4 +27,6 @@ dist_pkgdata_SCRIPTS = \
 	tst.promote_conflict.ksh \
 	tst.promote_conflict.zcp \
 	tst.promote_multiple.ksh \
-	tst.promote_simple.ksh
+	tst.promote_simple.ksh \
+	tst.rollback_mult.ksh \
+	tst.rollback_one.ksh
diff --git a/tests/zfs-tests/tests/functional/channel_program/synctask_core/tst.rollback_mult.ksh b/tests/zfs-tests/tests/functional/channel_program/synctask_core/tst.rollback_mult.ksh
new file mode 100755
index 000000000..778abc09d
--- /dev/null
+++ b/tests/zfs-tests/tests/functional/channel_program/synctask_core/tst.rollback_mult.ksh
@@ -0,0 +1,61 @@
+#!/bin/ksh -p
+#
+# This file and its contents are supplied under the terms of the
+# Common Development and Distribution License ("CDDL"), version 1.0.
+# You may only use this file in accordance with the terms of version
+# 1.0 of the CDDL.
+#
+# A full copy of the text of the CDDL should have accompanied this
+# source.  A copy of the CDDL is also available via the Internet at
+# http://www.illumos.org/license/CDDL.
+#
+
+#
+# Copyright (c) 2016, 2017 by Delphix. All rights reserved.
+#
+
+. $STF_SUITE/tests/functional/channel_program/channel_common.kshlib
+
+verify_runnable "global"
+snap1=$TESTPOOL/$TESTFS@$TESTSNAP1
+snap2=$TESTPOOL/$TESTFS@$TESTSNAP2
+fs=$TESTPOOL/$TESTFS
+file=$TESTDIR/$TESTFILE0
+
+function cleanup
+{
+	datasetexists $snap1 && log_must zfs destroy $snap1 && \
+	    log_must rm $file
+}
+
+log_onexit cleanup
+
+log_must mkfile 128b $file
+create_snapshot $TESTPOOL/$TESTFS $TESTSNAP1
+log_must rm $file
+create_snapshot $TESTPOOL/$TESTFS $TESTSNAP2
+
+log_must snapexists $snap1
+log_must snapexists $snap2
+log_must zfs unmount $fs
+
+log_must_program $TESTPOOL - $fs $snap2 <<-EOF
+	arg = ...
+	fs = arg["argv"][1]
+	snap = arg["argv"][2]
+	err = zfs.sync.rollback(fs)
+	if err == 0 then
+		err = zfs.sync.destroy(snap)
+	end
+	if err == 0 then
+		err = zfs.sync.rollback(fs)
+	end
+	msg = "rolling back " .. fs .. " err=" .. err
+	return msg
+EOF
+
+log_must zfs mount $fs
+log_must [ -f $file ]
+log_mustnot snapexists $snap2
+
+log_pass "Rolling back snapshot with channel program works."
diff --git a/tests/zfs-tests/tests/functional/channel_program/synctask_core/tst.rollback_one.ksh b/tests/zfs-tests/tests/functional/channel_program/synctask_core/tst.rollback_one.ksh
new file mode 100755
index 000000000..2a8e83913
--- /dev/null
+++ b/tests/zfs-tests/tests/functional/channel_program/synctask_core/tst.rollback_one.ksh
@@ -0,0 +1,51 @@
+#!/bin/ksh -p
+#
+# This file and its contents are supplied under the terms of the
+# Common Development and Distribution License ("CDDL"), version 1.0.
+# You may only use this file in accordance with the terms of version
+# 1.0 of the CDDL.
+#
+# A full copy of the text of the CDDL should have accompanied this
+# source.  A copy of the CDDL is also available via the Internet at
+# http://www.illumos.org/license/CDDL.
+#
+
+#
+# Copyright (c) 2016, 2017 by Delphix. All rights reserved.
+#
+
+. $STF_SUITE/tests/functional/channel_program/channel_common.kshlib
+
+verify_runnable "global"
+snap=$TESTPOOL/$TESTFS@$TESTSNAP
+fs=$TESTPOOL/$TESTFS
+file=$TESTDIR/$TESTFILE0
+
+function cleanup
+{
+	datasetexists $snap && log_must zfs destroy $snap && \
+	    log_must rm $file
+
+}
+
+log_onexit cleanup
+
+log_must mkfile 128b $file
+create_snapshot $TESTPOOL/$TESTFS $TESTSNAP
+log_must rm $file
+
+log_must snapexists $snap
+log_must zfs unmount $fs
+
+log_must_program $TESTPOOL - $fs <<-EOF
+	arg = ...
+	fs = arg["argv"][1]
+	err = zfs.sync.rollback(fs)
+	msg = "rolling back " .. fs .. " err=" .. err
+	return msg
+EOF
+
+log_must zfs mount $fs
+log_must [ -f $file ]
+
+log_pass "Rolling back snapshot with channel program works."