1#!/bin/bash
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#
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. $STF_SUITE/tests/functional/zvol/zvol_common.shlib
34
35#
36# DESCRIPTION:
37#	Add a swap zvol, and consume most (not all) of the space. This test
38#	used to fill up swap, which can hang the system.
39#
40# STRATEGY:
41#	1. Create a new zvol and add it as swap
42#	2. Fill /tmp with 80% the size of the zvol
43#	5. Remove the new zvol, and restore original swap devices
44#
45
46verify_runnable "global"
47log_assert "Using a zvol as swap space, fill /tmp to 80%."
48
49vol=$TESTPOOL/$TESTVOL
50swapdev=/dev/zvol/dsk/$vol
51log_must swap -a $swapdev
52
53# Get 80% of the number of 512 blocks in the zvol
54typeset -i count blks volsize=$(get_prop volsize $vol)
55((blks = (volsize / 512) * 80 / 100))
56# Use 'blks' to determine a count for dd based on a 1M block size.
57((count = blks / 2048))
58
59log_note "Fill 80% of swap"
60log_must dd if=/dev/urandom of=/tmp/$TESTFILE bs=1048576 count=$count
61log_must rm -f /tmp/$TESTFILE
62log_must swap -d $swapdev
63
64log_pass "Using a zvol as swap space, fill /tmp to 80%."
65