1#!/bin/ksh
2
3#
4# This file and its contents are supplied under the terms of the
5# Common Development and Distribution License ("CDDL"), version 1.0.
6# You may only use this file in accordance with the terms of version
7# 1.0 of the CDDL.
8#
9# A full copy of the text of the CDDL should have accompanied this
10# source.  A copy of the CDDL is also available via the Internet at
11# http://www.illumos.org/license/CDDL.
12#
13
14#
15# Copyright (c) 2017 by Lawrence Livermore National Security, LLC.
16# Copyright (c) 2020 by Delphix. All rights reserved.
17#
18
19. $STF_SUITE/include/libtest.shlib
20
21#
22# Description:
23# zdb will not produce redundant dumps of uberblocks
24#
25# Strategy:
26# 1. Create a pool with two vdevs, A and B
27# 2. Offline vdev A
28# 3. Do some I/O
29# 4. Export the pool
30# 5. Copy label 1 from vdev A to vdev B
31# 6. Collect zdb -lu output for vdev B
32# 7. Verify labels 0 and 1 have unique Uberblocks, but 2 and 3 have none
33#
34
35log_assert "Verify zdb produces unique dumps of uberblocks"
36log_onexit cleanup
37
38function cleanup
39{
40	datasetexists $TESTPOOL && destroy_pool $TESTPOOL
41	for DISK in $DISKS; do
42		zpool labelclear -f $DEV_RDSKDIR/$DISK
43	done
44	if is_freebsd; then
45		log_must sysctl kern.geom.debugflags=$saved_debugflags
46	fi
47}
48
49if is_freebsd; then
50	# FreeBSD won't allow writing to an in-use device without this set
51	saved_debugflags=$(sysctl -n kern.geom.debugflags)
52	log_must sysctl kern.geom.debugflags=16
53fi
54
55verify_runnable "global"
56verify_disk_count "$DISKS" 2
57set -A DISK $DISKS
58WHOLE_DISK=${DISK[0]}
59
60default_mirror_setup_noexit $DISKS
61DEVS=$(get_pool_devices ${TESTPOOL} ${DEV_RDSKDIR})
62[[ -n $DEVS ]] && set -A DISK $DEVS
63
64log_must zpool offline $TESTPOOL $WHOLE_DISK
65log_must dd if=/dev/urandom of=$TESTDIR/testfile bs=1K count=2
66log_must zpool export $TESTPOOL
67
68log_must dd if=$DEV_RDSKDIR/${DISK[0]} of=$DEV_RDSKDIR/${DISK[1]} bs=1K count=256 conv=notrunc
69
70ubs=$(zdb -lu ${DISK[1]} | grep -e LABEL -e Uberblock -e 'labels = ')
71log_note "vdev 1: ubs $ubs"
72
73set -o pipefail
74ub_dump_counts=$(zdb -lu ${DISK[1]} | \
75	awk '	/LABEL/	{label=$NF; blocks[label]=0};
76		/Uberblock/ {blocks[label]++};
77		END {print blocks[0],blocks[1],blocks[2],blocks[3]}') ||
78	log_fail "failed to get ub_dump_counts from DISK[1]"
79log_note "vdev 1: ub_dump_counts $ub_dump_counts"
80set +o pipefail
81
82set -A dump_count $ub_dump_counts
83for label in 0 1 2 3; do
84	if [[ $label -lt 2 ]]; then
85 		[[ ${dump_count[$label]} -eq 0 ]] && \
86		    log_fail "zdb incorrectly dumps duplicate uberblocks"
87	else
88 		[[ ${dump_count[$label]} -ne 0 ]] && \
89		    log_fail "zdb incorrectly dumps duplicate uberblocks"
90	fi
91done
92
93cleanup
94
95log_pass "zdb produces unique dumps of uberblocks"
96