1#!/bin/ksh -p
2#
3# CDDL HEADER START
4#
5# This file and its contents are supplied under the terms of the
6# Common Development and Distribution License ("CDDL"), version 1.0.
7# You may only use this file in accordance with the terms of version
8# 1.0 of the CDDL.
9#
10# A full copy of the text of the CDDL should have accompanied this
11# source.  A copy of the CDDL is also available via the Internet at
12# http://www.illumos.org/license/CDDL.
13#
14# CDDL HEADER END
15#
16
17#
18# Copyright (c) 2020, George Amanakis. All rights reserved.
19#
20
21. $STF_SUITE/include/libtest.shlib
22. $STF_SUITE/tests/functional/l2arc/l2arc.cfg
23
24#
25# DESCRIPTION:
26#	Off/onlining an L2ARC device restores all written blocks, vdev present.
27#
28# STRATEGY:
29#	1. Create pool with a cache device.
30#	2. Create a random file in that pool and random read for 10 sec.
31#	3. Read the amount of log blocks written from the header of the
32#		L2ARC device.
33#	4. Offline the L2ARC device.
34#	5. Online the L2ARC device.
35#	6. Read the amount of log blocks rebuilt in arcstats and compare to
36#		(3).
37#	7. Create another random file in that pool and random read for 10 sec.
38#	8. Read the amount of log blocks written from the header of the
39#		L2ARC device.
40#	9. Offline the L2ARC device.
41#	10. Online the L2ARC device.
42#	11. Read the amount of log blocks rebuilt in arcstats and compare to
43#		(8).
44#	12. Check if the amount of log blocks on the cache device has
45#		increased.
46#	13. Export the pool.
47#	14. Read the amount of log blocks on the cache device.
48#	15. Import the pool.
49#	16. Read the amount of log blocks rebuilt in arcstats and compare to
50#		(14).
51#	17. Check if the labels of the L2ARC device are intact.
52#
53
54verify_runnable "global"
55
56log_assert "Off/onlining an L2ARC device restores all written blocks , vdev present."
57
58function cleanup
59{
60	if poolexists $TESTPOOL ; then
61		destroy_pool $TESTPOOL
62	fi
63
64	log_must set_tunable32 l2arc_noprefetch $noprefetch
65}
66log_onexit cleanup
67
68# l2arc_noprefetch is set to 0 to let L2ARC handle prefetches
69typeset noprefetch=$(get_tunable l2arc_noprefetch)
70log_must set_tunable32 l2arc_noprefetch 0
71
72typeset fill_mb=400
73typeset cache_sz=$(( 3 * $fill_mb ))
74export FILE_SIZE=$(( floor($fill_mb / $NUMJOBS) ))M
75
76log_must truncate -s ${cache_sz}M $VDEV_CACHE
77
78log_must zpool create -f $TESTPOOL $VDEV cache $VDEV_CACHE
79
80log_must fio $FIO_SCRIPTS/mkfiles.fio
81log_must fio $FIO_SCRIPTS/random_reads.fio
82
83arcstat_quiescence_noecho l2_size
84log_must zpool offline $TESTPOOL $VDEV_CACHE
85arcstat_quiescence_noecho l2_size
86
87typeset l2_dh_log_blk1=$(zdb -l $VDEV_CACHE | grep log_blk_count | \
88	awk '{print $2}')
89typeset l2_rebuild_log_blk_start=$(get_arcstat l2_rebuild_log_blks)
90
91log_must zpool online $TESTPOOL $VDEV_CACHE
92arcstat_quiescence_noecho l2_size
93
94typeset l2_rebuild_log_blk_end=$(arcstat_quiescence_echo l2_rebuild_log_blks)
95
96log_must test $l2_dh_log_blk1 -eq $(( $l2_rebuild_log_blk_end - \
97	$l2_rebuild_log_blk_start ))
98log_must test $l2_dh_log_blk1 -gt 0
99
100log_must fio $FIO_SCRIPTS/mkfiles.fio
101log_must fio $FIO_SCRIPTS/random_reads.fio
102
103arcstat_quiescence_noecho l2_size
104log_must zpool offline $TESTPOOL $VDEV_CACHE
105arcstat_quiescence_noecho l2_size
106
107typeset l2_dh_log_blk2=$(zdb -l $VDEV_CACHE | grep log_blk_count | \
108	awk '{print $2}')
109typeset l2_rebuild_log_blk_start=$(get_arcstat l2_rebuild_log_blks)
110
111log_must zpool online $TESTPOOL $VDEV_CACHE
112arcstat_quiescence_noecho l2_size
113
114typeset l2_rebuild_log_blk_end=$(arcstat_quiescence_echo l2_rebuild_log_blks)
115
116log_must test $l2_dh_log_blk2 -eq $(( $l2_rebuild_log_blk_end - \
117	$l2_rebuild_log_blk_start ))
118log_must test $l2_dh_log_blk2 -gt $l2_dh_log_blk1
119
120log_must zpool export $TESTPOOL
121arcstat_quiescence_noecho l2_feeds
122
123typeset l2_dh_log_blk3=$(zdb -l $VDEV_CACHE | grep log_blk_count | \
124	awk '{print $2}')
125typeset l2_rebuild_log_blk_start=$(get_arcstat l2_rebuild_log_blks)
126
127log_must zpool import -d $VDIR $TESTPOOL
128arcstat_quiescence_noecho l2_size
129
130typeset l2_rebuild_log_blk_end=$(arcstat_quiescence_echo l2_rebuild_log_blks)
131
132log_must test $l2_dh_log_blk3 -eq $(( $l2_rebuild_log_blk_end - \
133	$l2_rebuild_log_blk_start ))
134log_must test $l2_dh_log_blk3 -gt 0
135
136log must zpool offline $TESTPOOL $VDEV_CACHE
137arcstat_quiescence_noecho l2_size
138
139log_must zdb -lq $VDEV_CACHE
140
141log_must zpool destroy -f $TESTPOOL
142
143log_pass "Off/onlining an L2ARC device restores all written blocks, vdev present."
144