1#!/bin/ksh -p
2#
3# CDDL HEADER START
4#
5# The contents of this file are subject to the terms of the
6# Common Development and Distribution License (the "License").
7# You may not use this file except in compliance with the License.
8#
9# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10# or http://www.opensolaris.org/os/licensing.
11# See the License for the specific language governing permissions
12# and limitations under the License.
13#
14# When distributing Covered Code, include this CDDL HEADER in each
15# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16# If applicable, add the following below this CDDL HEADER, with the
17# fields enclosed by brackets "[]" replaced with your own identifying
18# information: Portions Copyright [yyyy] [name of copyright owner]
19#
20# CDDL HEADER END
21#
22
23#
24# Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
25# Use is subject to license terms.
26#
27
28#
29# Copyright (c) 2013, 2016 by Delphix. All rights reserved.
30#
31
32. $STF_SUITE/include/libtest.shlib
33. $STF_SUITE/tests/functional/refreserv/refreserv.cfg
34
35#
36# DESCRIPTION:
37#	Setting full size as refreservation, verify no snapshot can be created.
38#
39# STRATEGY:
40#	1. Setting full size as refreservation on pool
41#	2. Verify no snapshot can be created on this pool
42#	3. Setting full size as refreservation on filesystem
43#	4. Verify no snapshot can be created on it and its subfs
44#
45
46verify_runnable "both"
47
48function cleanup
49{
50	if is_global_zone ; then
51		log_must zfs set refreservation=none $TESTPOOL
52
53		if datasetexists $TESTPOOL@snap ; then
54			log_must zfs destroy -f $TESTPOOL@snap
55		fi
56	fi
57	log_must zfs destroy -rf $TESTPOOL/$TESTFS
58	log_must zfs create $TESTPOOL/$TESTFS
59	log_must zfs set mountpoint=$TESTDIR $TESTPOOL/$TESTFS
60}
61
62# This function iteratively increases refreserv to its highest possible
63# value. Simply setting refreserv == quota can allow enough writes to
64# complete that the test fails.
65function max_refreserv
66{
67	typeset ds=$1
68	typeset -i incsize=131072
69	typeset -i rr=$(get_prop available $ds)
70
71	log_must zfs set refreserv=$rr $ds
72	while :; do
73		zfs set refreserv=$((rr + incsize)) $ds >/dev/null 2>&1
74		if [[ $? == 0 ]]; then
75			((rr += incsize))
76			continue
77		else
78			((incsize /= 2))
79			((incsize == 0)) && break
80		fi
81	done
82}
83
84
85log_assert "Setting full size as refreservation, verify no snapshot " \
86	"can be created."
87log_onexit cleanup
88
89log_must zfs create $TESTPOOL/$TESTFS/subfs
90
91typeset datasets
92if is_global_zone; then
93	datasets="$TESTPOOL $TESTPOOL/$TESTFS $TESTPOOL/$TESTFS/subfs"
94else
95	datasets="$TESTPOOL/$TESTFS $TESTPOOL/$TESTFS/subfs"
96fi
97
98for ds in $datasets; do
99	#
100	# Verify refreservation on dataset
101	#
102	log_must zfs set quota=25M $ds
103	max_refreserv $ds
104	log_mustnot zfs snapshot $ds@snap
105	if datasetexists $ds@snap ; then
106		log_fail "ERROR: $ds@snap should not exists."
107	fi
108
109	log_must zfs set quota=none $ds
110	log_must zfs set refreservation=none $ds
111done
112
113log_pass "Setting full size as refreservation, verify no snapshot " \
114	"can be created."
115