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) 2014, 2017 by Delphix. All rights reserved.
19# Copyright (c) 2018 by Lawrence Livermore National Security, LLC.
20#
21
22. $STF_SUITE/include/libtest.shlib
23. $STF_SUITE/tests/functional/removal/removal.kshlib
24
25#
26# DESCRIPTION:
27#
28# This test ensures that even when child vdevs are unavailable the
29# device removal process copies from readable source children to
30# writable destination children.  This may be different than the
31# default mapping which preferentially pairs up source and destination
32# child vdevs based on their child ids.
33#
34# Default Mapping:
35#   mirror-0                mirror-1
36#     DISK0 (child 0) ------> DISK2 (child 0)
37#     DISK1 (child 1) ------> DISK3 (child 1)
38#
39# We want to setup a scenario where the default mapping would make
40# it impossible to copy any data during the removal process.  This
41# is done by faulting both the mirror-0 (child 0) source vdev and
42# mirror-1 (child 1) destination vdev.  As shown below the default
43# mapping cannot be used due to the FAULTED vdevs.  Verify that an
44# alternate mapping is selected and all the readable data is copied.
45#
46# Default Mapping (BAD):
47#   mirror-0                mirror-1
48#     DISK0 (FAULTED) ------> DISK2
49#     DISK1 ----------------> DISK3 (FAULTED)
50#
51# Required Mapping (GOOD):
52#   mirror-0                mirror-1
53#     DISK0 (FAULTED)   +---> DISK2
54#     DISK1 ------------+     DISK3 (FAULTED)
55#
56# STRATEGY:
57#
58# 1. We create a pool with two top-level mirror vdevs.
59# 2. We write some test data to the pool.
60# 3. We fault two children to force the scenario described above.
61# 4. We remove the mirror-0 device.
62# 5. We verify that the device has been removed and that all of the
63#    data is still intact.
64#
65
66TMPDIR=${TMPDIR:-$TEST_BASE_DIR}
67DISK0=$TMPDIR/dsk0
68DISK1=$TMPDIR/dsk1
69DISK2=$TMPDIR/dsk2
70DISK3=$TMPDIR/dsk3
71
72log_must truncate -s $MINVDEVSIZE $DISK0 $DISK1
73log_must truncate -s $((MINVDEVSIZE * 4)) $DISK2 $DISK3
74
75function cleanup
76{
77	default_cleanup_noexit
78	log_must rm -f $DISK0 $DISK1 $DISK2 $DISK3
79}
80
81default_setup_noexit "mirror $DISK0 $DISK1 mirror $DISK2 $DISK3"
82log_onexit cleanup
83
84log_must zpool offline -f $TESTPOOL $DISK0
85log_must zpool offline -f $TESTPOOL $DISK3
86
87FILE_CONTENTS="Leeloo Dallas mul-ti-pass."
88
89echo $FILE_CONTENTS  >$TESTDIR/$TESTFILE0
90log_must [ "x$(<$TESTDIR/$TESTFILE0)" = "x$FILE_CONTENTS" ]
91log_must file_write -o create -f $TESTDIR/$TESTFILE1 -b $((2**20)) -c $((2**7))
92sync_pool $TESTPOOL
93
94log_must zpool remove $TESTPOOL mirror-0
95log_must wait_for_removal $TESTPOOL
96log_mustnot vdevs_in_pool $TESTPOOL mirror-0
97
98verify_pool $TESTPOOL
99
100log_must dd if=$TESTDIR/$TESTFILE0 of=/dev/null
101log_must [ "x$(<$TESTDIR/$TESTFILE0)" = "x$FILE_CONTENTS" ]
102log_must dd if=$TESTDIR/$TESTFILE1 of=/dev/null
103
104log_pass "Can remove with faulted vdevs"
105