1#!/bin/ksh -p
2#
3# CDDL HEADER START
4#
5# The contents of this file are subject to the terms of the
6# Common Development and Distribution License (the "License").
7# You may not use this file except in compliance with the License.
8#
9# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10# or https://opensource.org/licenses/CDDL-1.0.
11# See the License for the specific language governing permissions
12# and limitations under the License.
13#
14# When distributing Covered Code, include this CDDL HEADER in each
15# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16# If applicable, add the following below this CDDL HEADER, with the
17# fields enclosed by brackets "[]" replaced with your own identifying
18# information: Portions Copyright [yyyy] [name of copyright owner]
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20# CDDL HEADER END
21#
22
23#
24# Copyright (c) 2021 by Lawrence Livermore National Security, LLC.
25#
26
27. $STF_SUITE/include/libtest.shlib
28. $STF_SUITE/tests/functional/redundancy/redundancy.kshlib
29
30#
31# DESCRIPTION:
32#	When sequentially resilvering a dRAID pool with multiple vdevs
33#	that contain silent damage a sequential resilver should never
34#	introduce additional unrecoverable damage.
35#
36# STRATEGY:
37#	1. Create block device files for the test draid pool
38#	2. For each parity value [1..3]
39#	    - create draid pool
40#	    - fill it with some directories/files
41#	    - overwrite the maximum number of repairable devices
42#	    - sequentially resilver each overwritten device one at a time;
43#	      the device will not be correctly repaired because the silent
44#	      damage on the other vdevs will cause the parity calculations
45#	      to generate incorrect data for the resilvering vdev.
46#	    - verify that only the resilvering devices had invalid data
47#	      written and that a scrub is still able to repair the pool
48#	    - destroy the draid pool
49#
50
51typeset -r devs=7
52typeset -r dev_size_mb=512
53
54typeset -a disks
55
56prefetch_disable=$(get_tunable PREFETCH_DISABLE)
57rebuild_scrub_enabled=$(get_tunable REBUILD_SCRUB_ENABLED)
58
59function cleanup
60{
61	poolexists "$TESTPOOL" && destroy_pool "$TESTPOOL"
62
63	for i in {0..$devs}; do
64		rm -f "$TEST_BASE_DIR/dev-$i"
65	done
66
67	set_tunable32 PREFETCH_DISABLE $prefetch_disable
68	set_tunable32 REBUILD_SCRUB_ENABLED $rebuild_scrub_enabled
69}
70
71function test_sequential_resilver # <pool> <parity> <dir>
72{
73	typeset pool=$1
74	typeset nparity=$2
75	typeset dir=$3
76
77	log_must zpool export $pool
78
79	for (( i=0; i<$nparity; i=i+1 )); do
80		log_must dd conv=notrunc if=/dev/zero of=$dir/dev-$i \
81		    bs=1M seek=4 count=$(($dev_size_mb-4))
82	done
83
84	log_must zpool import -o cachefile=none -d $dir $pool
85
86	for (( i=0; i<$nparity; i=i+1 )); do
87		spare=draid${nparity}-0-$i
88		log_must zpool replace -fsw $pool $dir/dev-$i $spare
89	done
90
91	log_must zpool scrub -w $pool
92	log_must zpool status $pool
93
94	log_mustnot check_pool_status $pool "scan" "repaired 0B"
95	log_must check_pool_status $pool "errors" "No known data errors"
96	log_must check_pool_status $pool "scan" "with 0 errors"
97}
98
99log_onexit cleanup
100
101log_must set_tunable32 PREFETCH_DISABLE 1
102log_must set_tunable32 REBUILD_SCRUB_ENABLED 0
103
104# Disk files which will be used by pool
105for i in {0..$(($devs - 1))}; do
106	device=$TEST_BASE_DIR/dev-$i
107	log_must truncate -s ${dev_size_mb}M $device
108	disks[${#disks[*]}+1]=$device
109done
110
111# Disk file which will be attached
112log_must truncate -s 512M $TEST_BASE_DIR/dev-$devs
113
114for nparity in 1 2 3; do
115	raid=draid${nparity}:${nparity}s
116	dir=$TEST_BASE_DIR
117
118	log_must zpool create -O compression=off -f -o cachefile=none $TESTPOOL $raid ${disks[@]}
119	log_must zfs set primarycache=metadata $TESTPOOL
120
121	log_must zfs create $TESTPOOL/fs
122	log_must fill_fs /$TESTPOOL/fs 1 512 100 1024 R
123
124	log_must zfs create -o compress=on $TESTPOOL/fs2
125	log_must fill_fs /$TESTPOOL/fs2 1 512 100 1024 R
126
127	log_must zfs create -o compress=on -o recordsize=8k $TESTPOOL/fs3
128	log_must fill_fs /$TESTPOOL/fs3 1 512 100 1024 R
129
130	log_must zpool export $TESTPOOL
131	log_must zpool import -o cachefile=none -d $dir $TESTPOOL
132
133	log_must check_pool_status $TESTPOOL "errors" "No known data errors"
134
135	test_sequential_resilver $TESTPOOL $nparity $dir
136
137	log_must zpool destroy "$TESTPOOL"
138done
139
140log_pass "draid damaged device(s) test succeeded."
141