1#!/bin/ksh -p
2# SPDX-License-Identifier: CDDL-1.0
3#
4# CDDL HEADER START
5#
6# The contents of this file are subject to the terms of the
7# Common Development and Distribution License (the "License").
8# You may not use this file except in compliance with the License.
9#
10# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
11# or https://opensource.org/licenses/CDDL-1.0.
12# See the License for the specific language governing permissions
13# and limitations under the License.
14#
15# When distributing Covered Code, include this CDDL HEADER in each
16# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
17# If applicable, add the following below this CDDL HEADER, with the
18# fields enclosed by brackets "[]" replaced with your own identifying
19# information: Portions Copyright [yyyy] [name of copyright owner]
20#
21# CDDL HEADER END
22#
23
24. $STF_SUITE/include/libtest.shlib
25. $STF_SUITE/tests/functional/block_cloning/block_cloning.kshlib
26
27#
28# DESCRIPTION:
29#	A PANIC is triggered in dbuf_redirty() if we clone a file, mmap it
30#	and write from the map into the file. PR#15656 fixes this scenario.
31#	This scenario also causes data corruption on FreeBSD, which is fixed
32#	by PR#15665.
33#
34# STRATEGY:
35#	1. Create a pool
36#	2. Create a test file
37#	3. Clone, mmap and write to the file using clone_mmap_write
38#	5. Synchronize cached writes
39#	6. Verfiy data is correctly written to the disk
40#
41
42verify_runnable "global"
43
44VDIR=$TEST_BASE_DIR/disk-bclone
45VDEV="$VDIR/a"
46
47function cleanup
48{
49	datasetexists $TESTPOOL && destroy_pool $TESTPOOL
50	rm -rf $VDIR
51}
52
53log_onexit cleanup
54
55log_assert "Test for clone, mmap and write scenario"
56
57log_must rm -rf $VDIR
58log_must mkdir -p $VDIR
59log_must truncate -s 1G $VDEV
60
61log_must zpool create -o feature@block_cloning=enabled $TESTPOOL $VDEV
62log_must zfs create $TESTPOOL/$TESTFS
63
64log_must dd if=/dev/urandom of=/$TESTPOOL/$TESTFS/file bs=1M count=512
65log_must clone_mmap_write /$TESTPOOL/$TESTFS/file /$TESTPOOL/$TESTFS/clone
66
67sync_pool $TESTPOOL
68log_must sync
69
70log_must have_same_content /$TESTPOOL/$TESTFS/file /$TESTPOOL/$TESTFS/clone
71blocks=$(get_same_blocks $TESTPOOL/$TESTFS file $TESTPOOL/$TESTFS clone)
72# FreeBSD's seq(1) leaves a trailing space, remove it with sed(1).
73log_must [ "$blocks" = "$(seq -s " " 1 4095 | sed 's/ $//')" ]
74
75log_pass "Clone, mmap and write does not cause data corruption or " \
76	"trigger panic"
77