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 results in rebuilding L2ARC, vdev not
27#	present.
28#
29# STRATEGY:
30#	1. Create pool with a cache device.
31#	2. Create a random file in that pool and random read for 10 sec.
32#	3. Read the amount of log blocks written from the header of the
33#		L2ARC device.
34#	4. Offline the L2ARC device and export pool.
35#	5. Import pool and online the L2ARC device.
36#	6. Read the amount of log blocks rebuilt in arcstats and compare to
37#		(3).
38#	7. Check if the labels of the L2ARC device are intact.
39#
40
41verify_runnable "global"
42
43command -v fio > /dev/null || log_unsupported "fio missing"
44
45log_assert "Off/onlining an L2ARC device results in rebuilding L2ARC, vdev not present."
46
47function cleanup
48{
49	if poolexists $TESTPOOL ; then
50		destroy_pool $TESTPOOL
51	fi
52
53	log_must set_tunable32 L2ARC_NOPREFETCH $noprefetch
54	log_must set_tunable32 L2ARC_REBUILD_BLOCKS_MIN_L2SIZE \
55		$rebuild_blocks_min_l2size
56}
57log_onexit cleanup
58
59# L2ARC_NOPREFETCH is set to 0 to let L2ARC handle prefetches
60typeset noprefetch=$(get_tunable L2ARC_NOPREFETCH)
61typeset rebuild_blocks_min_l2size=$(get_tunable L2ARC_REBUILD_BLOCKS_MIN_L2SIZE)
62log_must set_tunable32 L2ARC_NOPREFETCH 0
63log_must set_tunable32 L2ARC_REBUILD_BLOCKS_MIN_L2SIZE 0
64
65typeset fill_mb=800
66typeset cache_sz=$(( floor($fill_mb / 2) ))
67export FILE_SIZE=$(( floor($fill_mb / $NUMJOBS) ))M
68
69log_must truncate -s ${cache_sz}M $VDEV_CACHE
70
71log_must zpool create -f $TESTPOOL $VDEV cache $VDEV_CACHE
72
73log_must fio $FIO_SCRIPTS/mkfiles.fio
74log_must fio $FIO_SCRIPTS/random_reads.fio
75
76arcstat_quiescence_noecho l2_size
77log_must zpool offline $TESTPOOL $VDEV_CACHE
78arcstat_quiescence_noecho l2_size
79log_must zpool export $TESTPOOL
80arcstat_quiescence_noecho l2_feeds
81
82typeset l2_rebuild_log_blk_start=$(get_arcstat l2_rebuild_log_blks)
83typeset l2_dh_log_blk=$(zdb -l $VDEV_CACHE | awk '/log_blk_count/ {print $2}')
84
85log_must zpool import -d $VDIR $TESTPOOL
86log_must zpool online $TESTPOOL $VDEV_CACHE
87arcstat_quiescence_noecho l2_size
88
89typeset l2_rebuild_log_blk_end=$(arcstat_quiescence_echo l2_rebuild_log_blks)
90
91log_must test $l2_dh_log_blk -eq $(( $l2_rebuild_log_blk_end - \
92	$l2_rebuild_log_blk_start ))
93log_must test $l2_dh_log_blk -gt 0
94
95log_must zpool offline $TESTPOOL $VDEV_CACHE
96arcstat_quiescence_noecho l2_size
97
98log_must zdb -lq $VDEV_CACHE
99
100log_must zpool destroy -f $TESTPOOL
101
102log_pass "Off/onlining an L2ARC device results in rebuilding L2ARC, vdev not present."
103