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		datasetexists $TESTPOOL@snap && destroy_dataset $TESTPOOL@snap -f
54	fi
55	destroy_dataset $TESTPOOL/$TESTFS -rf
56	log_must zfs create $TESTPOOL/$TESTFS
57	log_must zfs set mountpoint=$TESTDIR $TESTPOOL/$TESTFS
58}
59
60# This function iteratively increases refreserv to its highest possible
61# value. Simply setting refreserv == quota can allow enough writes to
62# complete that the test fails.
63function max_refreserv
64{
65	typeset ds=$1
66	typeset -i incsize=131072
67	typeset -i rr=$(get_prop available $ds)
68
69	log_must zfs set refreserv=$rr $ds
70	while :; do
71		zfs set refreserv=$((rr + incsize)) $ds >/dev/null 2>&1
72		if [[ $? == 0 ]]; then
73			((rr += incsize))
74			continue
75		else
76			((incsize /= 2))
77			((incsize == 0)) && break
78		fi
79	done
80}
81
82
83log_assert "Setting full size as refreservation, verify no snapshot " \
84	"can be created."
85log_onexit cleanup
86
87log_must zfs create $TESTPOOL/$TESTFS/subfs
88
89typeset datasets
90if is_global_zone; then
91	datasets="$TESTPOOL $TESTPOOL/$TESTFS $TESTPOOL/$TESTFS/subfs"
92else
93	datasets="$TESTPOOL/$TESTFS $TESTPOOL/$TESTFS/subfs"
94fi
95
96for ds in $datasets; do
97	#
98	# Verify refreservation on dataset
99	#
100	log_must zfs set quota=25M $ds
101	max_refreserv $ds
102	log_mustnot zfs snapshot $ds@snap
103	if datasetexists $ds@snap ; then
104		log_fail "ERROR: $ds@snap should not exists."
105	fi
106
107	log_must zfs set quota=none $ds
108	log_must zfs set refreservation=none $ds
109done
110
111log_pass "Setting full size as refreservation, verify no snapshot " \
112	"can be created."
113