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/zvol/zvol_common.shlib
34
35#
36# DESCRIPTION:
37#	Add a swap zvol, and consume most (not all) of the space. This test
38#	used to fill up swap, which can hang the system.
39#
40# STRATEGY:
41#	1. Create a new zvol and add it as swap
42#	2. Fill //var/tmp with 80% the size of the zvol
43#	5. Remove the new zvol, and restore original swap devices
44#
45
46verify_runnable "global"
47
48function cleanup
49{
50	rm -rf $TEMPFILE
51
52	if is_swap_inuse $swapdev ; then
53		log_must swap_cleanup $swapdev
54	fi
55}
56
57log_assert "Using a zvol as swap space, fill /var/tmp to 80%."
58
59log_onexit cleanup
60
61vol=$TESTPOOL/$TESTVOL
62swapdev=${ZVOL_DEVDIR}/$vol
63log_must swap_setup $swapdev
64
65# Get 80% of the number of 512 blocks in the zvol
66typeset -i count blks volsize=$(get_prop volsize $vol)
67((blks = (volsize / 512) * 80 / 100))
68# Use 'blks' to determine a count for dd based on a 1M block size.
69((count = blks / 2048))
70
71log_note "Fill 80% of swap"
72log_must dd if=/dev/urandom of=$TEMPFILE bs=1048576 count=$count
73log_must rm -f $TEMPFILE
74log_must swap_cleanup $swapdev
75
76log_pass "Using a zvol as swap space, fill /var/tmp to 80%."
77