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.
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10# or http://www.opensolaris.org/os/licensing.
11# See the License for the specific language governing permissions
12# and limitations under the License.
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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
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20# CDDL HEADER END
21#
22
23#
24# Copyright 2007 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/snapshot/snapshot.cfg
34
35#
36# DESCRIPTION:
37# Verify that destroying snapshots returns space to the pool.
38#
39# STRATEGY:
40# 1. Create a file system and populate it while snapshotting.
41# 2. Destroy the snapshots and remove the files.
42# 3. Verify the space returns to the pool.
43#
44
45verify_runnable "both"
46
47function cleanup
48{
49	typeset -i i=1
50	while [[ $i -lt $COUNT ]]; do
51		snapexists $SNAPFS.$i
52		[[ $? -eq 0 ]] && \
53			log_must zfs destroy $SNAPFS.$i
54
55		(( i = i + 1 ))
56	done
57
58	[[ -e $TESTDIR ]] && \
59		log_must rm -rf $TESTDIR/* > /dev/null 2>&1
60}
61
62log_assert "Verify that destroying snapshots returns space to the pool."
63
64log_onexit cleanup
65
66[[ -n $TESTDIR ]] && \
67    log_must rm -rf $TESTDIR/* > /dev/null 2>&1
68
69typeset -i COUNT=10
70
71orig_size=`get_prop available $TESTPOOL`
72
73log_note "Populate the $TESTDIR directory"
74typeset -i i=1
75while [[ $i -lt $COUNT ]]; do
76	log_must file_write -o create -f $TESTDIR/file$i \
77	   -b $BLOCKSZ -c $NUM_WRITES -d $i
78
79	log_must zfs snapshot $SNAPFS.$i
80	(( i = i + 1 ))
81done
82
83typeset -i i=1
84while [[ $i -lt $COUNT ]]; do
85	log_must rm -rf $TESTDIR/file$i > /dev/null 2>&1
86	log_must zfs destroy $SNAPFS.$i
87
88	(( i = i + 1 ))
89done
90
91new_size=`get_prop available $TESTPOOL`
92
93typeset -i tolerance=0
94
95(( tolerance = new_size - orig_size))
96if (( tolerance > LIMIT )); then
97        log_fail "Space not freed. ($orig_size != $new_size)"
98fi
99
100log_pass "After destroying snapshots, the space is returned to the pool."
101