1#!/usr/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) 2012, 2016 by Delphix. All rights reserved.
16#
17
18. $STF_SUITE/include/libtest.shlib
19. $STF_SUITE/tests/functional/nopwrite/nopwrite.shlib
20
21#
22# Description:
23# Verify that nopwrite is not enabled if the copies property changes
24#
25# Strategy:
26# 1. Create a clone with copies set higher than the origin fs
27# 2. Verify that nopwrite is in use.
28# 3. Repeat with the number of copies decreased.
29#
30
31verify_runnable "global"
32origin="$TESTPOOL/$TESTFS"
33log_onexit cleanup
34
35function cleanup
36{
37	datasetexists $origin && log_must zfs destroy -R $origin
38	log_must zfs create -o mountpoint=$TESTDIR $origin
39}
40
41log_assert "nopwrite requires copies property to remain constant"
42
43# Verify nopwrite is disabled with increased redundancy
44log_must zfs set compress=on $origin
45log_must zfs set checksum=sha256 $origin
46dd if=/dev/urandom of=$TESTDIR/file bs=1024k count=$MEGS conv=notrunc \
47    >/dev/null 2>&1 || log_fail "dd into $TESTDIR/file failed."
48zfs snapshot $origin@a || log_fail "zfs snap failed"
49log_must zfs clone $origin@a $origin/clone
50zfs set copies=3 $origin/clone
51dd if=/$TESTDIR/file of=/$TESTDIR/clone/file bs=1024k count=$MEGS \
52    conv=notrunc >/dev/null 2>&1 || log_fail "dd failed."
53log_mustnot verify_nopwrite $origin $origin@a $origin/clone
54
55# Verify nopwrite is disabled with decreased redundancy
56zfs destroy -R $origin || log_fail "Couldn't destroy $origin"
57zfs create -o mountpoint=$TESTDIR $origin || \
58    log_fail "Couldn't recreate $origin"
59log_must zfs set compress=on $origin
60log_must zfs set copies=3 $origin
61log_must zfs set checksum=sha256 $origin
62dd if=/dev/urandom of=$TESTDIR/file bs=1024k count=$MEGS conv=notrunc \
63    >/dev/null 2>&1 || log_fail "dd into $TESTDIR/file failed."
64zfs snapshot $origin@a || log_fail "zfs snap failed"
65log_must zfs clone $origin@a $origin/clone
66zfs set copies=1 $origin/clone
67dd if=/$TESTDIR/file of=/$TESTDIR/clone/file bs=1024k count=$MEGS \
68    conv=notrunc >/dev/null 2>&1 || log_fail "dd failed."
69log_mustnot verify_nopwrite $origin $origin@a $origin/clone
70
71log_pass "nopwrite requires copies property to remain constant"
72