xref: /freebsd/tools/test/stress2/misc/devfs.sh (revision fd45b686f9d92f583366c75b22c04c7ee49709c0)
1#!/bin/sh
2
3#
4# Copyright (c) 2008 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# Page fault seen:
30# https://people.freebsd.org/~pho/stress/log/devfs.txt
31# Fixed by r326851.
32
33[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
34
35. ../default.cfg
36
37mounts=15	# Number of parallel scripts
38cont=/tmp/devfs.continue
39
40if [ $# -eq 0 ]; then
41	touch $cont
42	for i in `jot $mounts`; do
43		[ ! -d ${mntpoint}$i ] && mkdir ${mntpoint}$i
44		mount | grep -q "on ${mntpoint}$i " && umount ${mntpoint}$i
45	done
46
47	# start the parallel tests
48	for i in `jot $mounts`; do
49		./$0 $i &
50		./$0 find &
51	done
52	wait
53else
54	if [ $1 = find ]; then
55		while [ -r $cont ]; do
56			find ${mntpoint}* > /dev/null 2>&1
57		done
58	else
59
60		# The test: Parallel mount and unmounts
61		start=`date '+%s'`
62		while [ `date '+%s'` -lt $((start + 300)) ]; do
63			m=$1
64			mount -t devfs none ${mntpoint}$m
65			opt=`[ $(( m % 2 )) -eq 0 ] && echo -f`
66			while mount | grep -q " ${mntpoint}$m "; do
67				umount $opt ${mntpoint}$m > /dev/null 2>&1
68			done
69		done
70		rm -f $cont
71	fi
72fi
73