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
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.
15 # Copyright (c) 2012, 2016 by Delphix. All rights reserved.
18 . $STF_SUITE/include/libtest.shlib
19 . $STF_SUITE/tests/functional/nopwrite/nopwrite.shlib
23 # Verify that nopwrite still works for a dataset that becomes a clone via
27 # 1. Create a clone suitable for nopwrite.
28 # 2. Disable compression and checksum on the clone, and promote it.
29 # 3. Overwrite the file in the clone (former origin fs) and verify it
30 # consumes no additional space.
33 verify_runnable "global"
34 origin="$TESTPOOL/$TESTFS"
39 datasetexists $origin && log_must zfs destroy -R $TESTPOOL/clone
40 log_must zfs create -o mountpoint=$TESTDIR $origin
43 log_assert "nopwrite works on a dataset that becomes a clone via promotion."
45 log_must zfs set compress=on $origin
46 log_must zfs set checksum=sha256 $origin
47 dd if=/dev/urandom of=$TESTDIR/file bs=1024k count=$MEGS conv=notrunc \
48 >/dev/null 2>&1 || log_fail "dd into $TESTDIR/file failed."
49 zfs snapshot $origin@a || log_fail "zfs snap failed"
50 log_must zfs clone $origin@a $TESTPOOL/clone
51 log_must zfs set compress=off $TESTPOOL/clone
52 log_must zfs set checksum=off $TESTPOOL/clone
53 log_must zfs promote $TESTPOOL/clone
54 dd if=/$TESTPOOL/clone/file of=/$TESTDIR/file bs=1024k count=$MEGS \
55 conv=notrunc >/dev/null 2>&1 || log_fail "dd failed."
56 log_must verify_nopwrite $TESTPOOL/clone $TESTPOOL/clone@a $origin
58 log_pass "nopwrite works on a dataset that becomes a clone via promotion."