1 files changed, 101 insertions, 0 deletions
diff --git a/tests/zfs-tests/tests/functional/persist_l2arc/persist_l2arc_004_pos.ksh b/tests/zfs-tests/tests/functional/persist_l2arc/persist_l2arc_004_pos.ksh
new file mode 100755
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--- /dev/null
+++ b/tests/zfs-tests/tests/functional/persist_l2arc/persist_l2arc_004_pos.ksh
@@ -0,0 +1,101 @@
+#!/bin/ksh -p
+#
+# CDDL HEADER START
+#
+# 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.
+#
+# CDDL HEADER END
+#
+
+#
+# Copyright (c) 2020, George Amanakis. All rights reserved.
+#
+
+. $STF_SUITE/include/libtest.shlib
+. $STF_SUITE/tests/functional/persist_l2arc/persist_l2arc.cfg
+
+#
+# DESCRIPTION:
+#	Persistent L2ARC restores all written log blocks
+#
+# STRATEGY:
+#	1. Create pool with a cache device.
+#	2. Create a random file in that pool, smaller than the cache device
+#		and random read for 30 sec.
+#	3. Export pool.
+#	4. Read amount of log blocks written.
+#	5. Import pool.
+#	6. Read amount of log blocks built.
+#	7. Compare the two amounts
+#	8. Read the file written in (2) and check if l2_hits in
+#		/proc/spl/kstat/zfs/arcstats increased.
+#	9. Check if the labels of the L2ARC device are intact.
+#
+
+verify_runnable "global"
+
+log_assert "Persistent L2ARC restores all written log blocks."
+
+function cleanup
+{
+	if poolexists $TESTPOOL ; then
+		destroy_pool $TESTPOOL
+	fi
+
+	log_must set_tunable32 L2ARC_NOPREFETCH $noprefetch
+}
+log_onexit cleanup
+
+# L2ARC_NOPREFETCH is set to 0 to let L2ARC handle prefetches
+typeset noprefetch=$(get_tunable L2ARC_NOPREFETCH)
+log_must set_tunable32 L2ARC_NOPREFETCH 0
+
+typeset fill_mb=800
+typeset cache_sz=$(( 2 * $fill_mb ))
+export FILE_SIZE=$(( floor($fill_mb / $NUMJOBS) ))M
+
+log_must truncate -s ${cache_sz}M $VDEV_CACHE
+
+typeset log_blk_start=$(get_arcstat l2_log_blk_writes)
+
+log_must zpool create -f $TESTPOOL $VDEV cache $VDEV_CACHE
+
+log_must fio $FIO_SCRIPTS/mkfiles.fio
+log_must fio $FIO_SCRIPTS/random_reads.fio
+
+log_must zpool export $TESTPOOL
+
+sleep 2
+
+typeset log_blk_end=$(get_arcstat l2_log_blk_writes)
+
+typeset log_blk_rebuild_start=$(get_arcstat l2_rebuild_log_blks)
+
+log_must zpool import -d $VDIR $TESTPOOL
+
+typeset l2_hits_start=$(get_arcstat l2_hits)
+
+export RUNTIME=10
+log_must fio $FIO_SCRIPTS/random_reads.fio
+
+typeset l2_hits_end=$(get_arcstat l2_hits)
+
+typeset log_blk_rebuild_end=$(get_arcstat l2_rebuild_log_blks)
+
+log_must test $(( $log_blk_rebuild_end - $log_blk_rebuild_start )) -eq \
+	$(( $log_blk_end - $log_blk_start ))
+
+log_must test $l2_hits_end -gt $l2_hits_start
+
+log_must zdb -lq $VDEV_CACHE
+
+log_must zpool destroy -f $TESTPOOL
+
+log_pass "Persistent L2ARC restores all written log blocks."