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. $STF_SUITE/tests/functional/nopwrite/nopwrite.shlib
20
21#
22# Description:
23# Verify that nopwrite still works for a dataset that becomes a clone via
24# promotion.
25#
26# Strategy:
27# 1. Create a clone suitable for nopwrite.
28# 2. Disable compression and checksum on the clone, and promote it.
29# 3. Overwrite the file in the clone (former origin fs) and verify it
30# consumes no additional space.
31#
32
33verify_runnable "global"
34origin="$TESTPOOL/$TESTFS"
35log_onexit cleanup
36
37function cleanup
38{
39	datasetexists $origin && log_must zfs destroy -R $TESTPOOL/clone
40	log_must zfs create -o mountpoint=$TESTDIR $origin
41}
42
43log_assert "nopwrite works on a dataset that becomes a clone via promotion."
44
45log_must zfs set compress=on $origin
46log_must zfs set checksum=sha256 $origin
47dd if=/dev/urandom of=$TESTDIR/file bs=1024k count=$MEGS conv=notrunc \
48    >/dev/null 2>&1 || log_fail "dd into $TESTDIR/file failed."
49zfs snapshot $origin@a || log_fail "zfs snap failed"
50log_must zfs clone $origin@a $TESTPOOL/clone
51log_must zfs set compress=off $TESTPOOL/clone
52log_must zfs set checksum=off $TESTPOOL/clone
53log_must zfs promote $TESTPOOL/clone
54dd if=/$TESTPOOL/clone/file of=/$TESTDIR/file bs=1024k count=$MEGS \
55    conv=notrunc >/dev/null 2>&1 || log_fail "dd failed."
56log_must verify_nopwrite $TESTPOOL/clone $TESTPOOL/clone@a $origin
57
58log_pass "nopwrite works on a dataset that becomes a clone via promotion."
59