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 https://opensource.org/licenses/CDDL-1.0.
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 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			log_must zfs destroy $SNAPFS.$i
53
54		(( i = i + 1 ))
55	done
56
57	[ -e $TESTDIR ] && log_must rm -rf $TESTDIR/*
58}
59
60log_assert "Verify that destroying snapshots returns space to the pool."
61
62log_onexit cleanup
63
64[ -n $TESTDIR ] && log_must rm -rf $TESTDIR/*
65
66typeset -i COUNT=10
67
68orig_size=`get_prop available $TESTPOOL`
69
70log_note "Populate the $TESTDIR directory"
71typeset -i i=1
72while [[ $i -lt $COUNT ]]; do
73	log_must file_write -o create -f $TESTDIR/file$i \
74	   -b $BLOCKSZ -c $NUM_WRITES -d $i
75
76	log_must zfs snapshot $SNAPFS.$i
77	(( i = i + 1 ))
78done
79
80typeset -i i=1
81while [[ $i -lt $COUNT ]]; do
82	log_must rm -f $TESTDIR/file$i
83	log_must zfs destroy $SNAPFS.$i
84
85	(( i = i + 1 ))
86done
87
88wait_freeing $TESTPOOL
89sync_pool
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