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