1#!/usr/local/bin/ksh93 -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]
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20# CDDL HEADER END
21#
22
23# $FreeBSD$
24
25#
26# Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
27# Use is subject to license terms.
28#
29# ident	"@(#)refreserv_002_pos.ksh	1.3	09/05/19 SMI"
30#
31
32. $STF_SUITE/include/libtest.kshlib
33
34#################################################################################
35#
36# __stc_assertion_start
37#
38# ID: refreserv_002_pos
39#
40# DESCRIPTION:
41#	Setting full size as refreservation, verify no snapshot can be created.
42#
43# STRATEGY:
44#	1. Setting full size as refreservation on pool
45#	2. Verify no snapshot can be created on this pool
46#	3. Setting full size as refreservation on filesystem
47#	4. Verify no snapshot can be created on it and its subfs
48#
49# TESTABILITY: explicit
50#
51# TEST_AUTOMATION_LEVEL: automated
52#
53# CODING_STATUS: COMPLETED (2007-11-05)
54#
55# __stc_assertion_end
56#
57################################################################################
58
59verify_runnable "both"
60
61function cleanup
62{
63	if is_global_zone ; then
64		log_must $ZFS set refreservation=none $TESTPOOL
65
66		if datasetexists $TESTPOOL@snap ; then
67			log_must $ZFS destroy -f $TESTPOOL@snap
68		fi
69	fi
70	log_must $ZFS destroy -rf $TESTPOOL/$TESTFS
71	log_must $ZFS create $TESTPOOL/$TESTFS
72	log_must $ZFS set mountpoint=$TESTDIR $TESTPOOL/$TESTFS
73}
74
75# This function iteratively increases refreserv to its highest possible
76# value. Simply setting refreserv == quota can allow enough writes to
77# complete that the test fails.
78function max_refreserv
79{
80	typeset ds=$1
81	typeset -i incsize=131072
82	typeset -i rr=$(get_prop available $ds)
83
84	log_must $ZFS set refreserv=$rr $ds
85	while :; do
86		$ZFS set refreserv=$((rr + incsize)) $ds >/dev/null 2>&1
87		if [[ $? == 0 ]]; then
88			((rr += incsize))
89			continue
90		else
91			((incsize /= 2))
92			((incsize == 0)) && break
93		fi
94	done
95}
96
97
98log_assert "Setting full size as refreservation, verify no snapshot " \
99	"can be created."
100log_onexit cleanup
101
102log_must $ZFS create $TESTPOOL/$TESTFS/subfs
103
104typeset datasets
105if is_global_zone; then
106	datasets="$TESTPOOL $TESTPOOL/$TESTFS $TESTPOOL/$TESTFS/subfs"
107else
108	datasets="$TESTPOOL/$TESTFS $TESTPOOL/$TESTFS/subfs"
109fi
110
111for ds in $datasets; do
112	#
113	# Verify refreservation on dataset
114	#
115	log_must $ZFS set quota=25M $ds
116	max_refreserv $ds
117	log_mustnot $ZFS snapshot $ds@snap
118	if datasetexists $ds@snap ; then
119		log_fail "ERROR: $ds@snap should not exists."
120	fi
121
122	log_must $ZFS set quota=none $ds
123	log_must $ZFS set refreservation=none $ds
124done
125
126log_pass "Setting full size as refreservation, verify no snapshot " \
127	"can be created."
128