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/include/properties.shlib
20. $STF_SUITE/tests/functional/nopwrite/nopwrite.shlib
21
22#
23# Description:
24# Verify that if the checksum on the origin and clone is sha256, any compression
25# algorithm enables nopwrite.
26#
27# Strategy:
28# 1. Create an origin dataset with compression and sha256 checksum.
29# 2. Write a 64M file into the origin dataset.
30# 3. For each of 4 randomly chosen compression types:
31# 3a. Create a snap and clone (inheriting the checksum property) of the origin.
32# 3b. Apply the compression property to the clone.
33# 3c. Write the same 64M of data into the file that exists in the clone.
34# 3d. Verify that no new space was consumed.
35#
36
37verify_runnable "global"
38origin="$TESTPOOL/$TESTFS"
39log_onexit cleanup
40
41function cleanup
42{
43	datasetexists $origin && log_must zfs destroy -R $origin
44	log_must zfs create -o mountpoint=$TESTDIR $origin
45}
46
47log_assert "nopwrite works with sha256 and any compression algorithm"
48
49log_must zfs set compress=on $origin
50log_must zfs set checksum=sha256 $origin
51dd if=/dev/urandom of=$TESTDIR/file bs=1024k count=$MEGS conv=notrunc \
52    >/dev/null 2>&1 || log_fail "initial dd failed."
53
54# Verify nop_write for 4 random compression algorithms
55for i in $(get_rand_compress 4); do
56	zfs snapshot $origin@a || log_fail "zfs snap failed"
57	log_must zfs clone -o compress=$i $origin@a $origin/clone
58	dd if=/$TESTDIR/file of=/$TESTDIR/clone/file bs=1024k count=$MEGS \
59	    conv=notrunc >/dev/null 2>&1 || log_fail "dd failed."
60	log_must verify_nopwrite $origin $origin@a $origin/clone
61	zfs destroy -R $origin@a || log_fail "zfs destroy failed"
62done
63
64log_pass "nopwrite works with sha256 and any compression algorithm"
65