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]
19#
20# CDDL HEADER END
21#
22
23. $STF_SUITE/include/libtest.shlib
24. $STF_SUITE/tests/functional/block_cloning/block_cloning.kshlib
25
26#
27# DESCRIPTION:
28#	A PANIC is triggered in dbuf_redirty() if we clone a file, mmap it
29#	and write from the map into the file. PR#15656 fixes this scenario.
30#	This scenario also causes data corruption on FreeBSD, which is fixed
31#	by PR#15665.
32#
33# STRATEGY:
34#	1. Create a pool
35#	2. Create a test file
36#	3. Clone, mmap and write to the file using clone_mmap_write
37#	5. Synchronize cached writes
38#	6. Verfiy data is correctly written to the disk
39#
40
41verify_runnable "global"
42
43if is_linux && [[ $(linux_version) -lt $(linux_version "4.5") ]]; then
44  log_unsupported "copy_file_range not available before Linux 4.5"
45fi
46
47VDIR=$TEST_BASE_DIR/disk-bclone
48VDEV="$VDIR/a"
49
50function cleanup
51{
52	datasetexists $TESTPOOL && destroy_pool $TESTPOOL
53	rm -rf $VDIR
54}
55
56log_onexit cleanup
57
58log_assert "Test for clone, mmap and write scenario"
59
60log_must rm -rf $VDIR
61log_must mkdir -p $VDIR
62log_must truncate -s 1G $VDEV
63
64log_must zpool create -o feature@block_cloning=enabled $TESTPOOL $VDEV
65log_must zfs create $TESTPOOL/$TESTFS
66
67log_must dd if=/dev/urandom of=/$TESTPOOL/$TESTFS/file bs=1M count=512
68log_must clone_mmap_write /$TESTPOOL/$TESTFS/file /$TESTPOOL/$TESTFS/clone
69
70sync_pool $TESTPOOL
71log_must sync
72
73log_must have_same_content /$TESTPOOL/$TESTFS/file /$TESTPOOL/$TESTFS/clone
74blocks=$(get_same_blocks $TESTPOOL/$TESTFS file $TESTPOOL/$TESTFS clone)
75# FreeBSD's seq(1) leaves a trailing space, remove it with sed(1).
76log_must [ "$blocks" = "$(seq -s " " 1 4095 | sed 's/ $//')" ]
77
78log_pass "Clone, mmap and write does not cause data corruption or " \
79	"trigger panic"
80