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#
25# Copyright (c) 2023 by iXsystems, Inc. All rights reserved.
26#
27
28. $STF_SUITE/include/libtest.shlib
29. $STF_SUITE/tests/functional/block_cloning/block_cloning.kshlib
30
31#
32# DESCRIPTION:
33#	Test for LWB buffer overflow with multiple VDEVs ZIL when 128KB
34#	block write is split into two 68KB ones, trying to write maximum
35#	sizes 128KB TX_CLONE_RANGE record with 1022 block pointers into
36#	68KB buffer.
37#
38# STRATEGY:
39#	1. Create a pool with multiple VDEVs ZIL
40#	2. Write maximum sizes TX_CLONE_RANGE record with 1022 block
41#	   pointers into 68KB buffer
42#	3. Sync TXG
43#	4. Clone the file
44#	5. Synchronize cached writes
45#
46
47verify_runnable "global"
48
49VDIR=$TEST_BASE_DIR/disk-bclone
50VDEV="$VDIR/a $VDIR/b $VDIR/c"
51LDEV="$VDIR/e $VDIR/f"
52
53function cleanup
54{
55	datasetexists $TESTPOOL && destroy_pool $TESTPOOL
56	rm -rf $VDIR
57}
58
59log_onexit cleanup
60
61log_assert "Test for LWB buffer overflow with multiple VDEVs ZIL"
62
63log_must rm -rf $VDIR
64log_must mkdir -p $VDIR
65log_must truncate -s $MINVDEVSIZE $VDEV $LDEV
66
67log_must zpool create -o feature@block_cloning=enabled $TESTPOOL $VDEV \
68	log mirror $LDEV
69log_must zfs create -o recordsize=32K $TESTPOOL/$TESTFS
70# Each ZIL log entry can fit 130816 bytes for a block cloning operation,
71# so it can store 1022 block pointers. When LWB optimization is enabled,
72# an assert is hit when 128KB block write is split into two 68KB ones
73# for 2 SLOG devices
74log_must dd if=/dev/urandom of=/$TESTPOOL/$TESTFS/file1 bs=32K count=1022 \
75	conv=fsync
76sync_pool $TESTPOOL
77log_must clonefile -f /$TESTPOOL/$TESTFS/file1 /$TESTPOOL/$TESTFS/file2
78log_must sync
79
80sync_pool $TESTPOOL
81log_must have_same_content /$TESTPOOL/$TESTFS/file1 /$TESTPOOL/$TESTFS/file2
82typeset blocks=$(get_same_blocks $TESTPOOL/$TESTFS file1 $TESTPOOL/$TESTFS file2)
83# FreeBSD's seq(1) leaves a trailing space, remove it with sed(1).
84log_must [ "$blocks" = "$(seq -s " " 0 1021 | sed 's/ $//')" ]
85
86log_pass "LWB buffer overflow is not triggered with multiple VDEVs ZIL"
87
88