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) 2019 by Delphix. All rights reserved.
19#
20
21. $STF_SUITE/include/libtest.shlib
22
23#
24# DESCRIPTION:
25# Log spacemaps are generally destroyed at export in order to
26# not induce performance overheads at import time. As a result,
27# the log spacemap codepaths that read the logs in import times
28# are not tested outside of ztest and pools with DEBUG bits doing
29# many imports/exports while running the test suite.
30#
31# This test uses an internal tunable and forces ZFS to keep the
32# log spacemaps at export, and then re-imports the pool, thus
33# providing explicit testing of those codepaths. It also uses
34# another tunable to load all the metaslabs when the pool is
35# re-imported so more assertions and verifications will be hit.
36#
37# STRATEGY:
38#	1. Create pool.
39#	2. Do a couple of writes to generate some data for spacemap logs.
40#	3. Set tunable to keep logs after export.
41#	4. Export pool and verify that there are logs with zdb.
42#	5. Set tunable to load all metaslabs at import.
43#	6. Import pool.
44#	7. Reset tunables.
45#
46
47verify_runnable "global"
48
49function cleanup
50{
51	log_must set_tunable64 KEEP_LOG_SPACEMAPS_AT_EXPORT 0
52	log_must set_tunable64 METASLAB_DEBUG_LOAD 0
53	if poolexists $LOGSM_POOL; then
54		log_must zpool destroy -f $LOGSM_POOL
55	fi
56}
57log_onexit cleanup
58
59LOGSM_POOL="logsm_import"
60TESTDISK="$(echo $DISKS | cut -d' ' -f1)"
61
62log_must zpool create -o cachefile=none -f $LOGSM_POOL $TESTDISK
63log_must zfs create $LOGSM_POOL/fs
64
65log_must dd if=/dev/urandom of=/$LOGSM_POOL/fs/00 bs=128k count=10
66sync_all_pools
67log_must dd if=/dev/urandom of=/$LOGSM_POOL/fs/00 bs=128k count=10
68sync_all_pools
69
70log_must set_tunable64 KEEP_LOG_SPACEMAPS_AT_EXPORT 1
71log_must zpool export $LOGSM_POOL
72
73LOGSM_COUNT=$(zdb -m -e $LOGSM_POOL | grep "Log Spacemap object" | wc -l)
74if (( LOGSM_COUNT == 0 )); then
75	log_fail "Pool does not have any log spacemaps after being exported"
76fi
77
78log_must set_tunable64 METASLAB_DEBUG_LOAD 1
79log_must zpool import $LOGSM_POOL
80
81log_pass "Log spacemaps imported with no errors"
82