1#!/bin/sh
2
3#
4# Copyright (c) 2012 Peter Holm <pho@FreeBSD.org>
5# All rights reserved.
6#
7# Redistribution and use in source and binary forms, with or without
8# modification, are permitted provided that the following conditions
9# are met:
10# 1. Redistributions of source code must retain the above copyright
11#    notice, this list of conditions and the following disclaimer.
12# 2. Redistributions in binary form must reproduce the above copyright
13#    notice, this list of conditions and the following disclaimer in the
14#    documentation and/or other materials provided with the distribution.
15#
16# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26# SUCH DAMAGE.
27#
28
29# Parallel mount and unmount of the same mount point
30# http://people.freebsd.org/~pho/stress/log/parallelumount3.txt
31
32[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
33
34. ../default.cfg
35
36parallel=40
37
38if [ $# -eq 0 ]; then
39	[ -c /dev/md$mdstart ] && mdconfig -d -u $mdstart
40	mdconfig -a -t swap -s 10m -u $mdstart || exit 1
41	newfs $newfs_flags md$mdstart > /dev/null
42
43	# start the parallel tests
44	for i in `jot $parallel`; do
45		./$0 $i &
46	done
47
48	while kill -0 $! 2> /dev/null; do
49		for i in `jot 100`; do
50			find $mntpoint > /dev/null 2>&1
51		done
52	done
53	wait
54
55	while mount | grep $mntpoint | grep -q /dev/md; do
56		umount $mntpoint || sleep 1
57	done
58	mdconfig -d -u $mdstart
59	exit 0
60else
61	start=`date '+%s'`
62	while [ $((`date '+%s'` - start)) -lt 600 ]; do
63		mount /dev/md$mdstart $mntpoint
64		umount $mntpoint
65		mount
66	done > /dev/null 2>&1
67fi
68