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# Stress test by performing parallel calls to mount and umount. Alternate 30# between forced and non-forced unmounts. 31 32# https://people.freebsd.org/~pho/stress/log/kostik169.txt 33# https://people.freebsd.org/~pho/stress/log/kostik487.txt 34 35[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 36 37. ../default.cfg 38 39mounts=15 # Number of parallel scripts 40: ${nullfs_srcdir:=/tmp} 41: ${nullfs_dstdir:=$mntpoint} 42 43if [ $# -eq 0 ]; then 44 for i in `jot $mounts`; do 45 [ ! -d ${nullfs_dstdir}$i ] && mkdir ${nullfs_dstdir}$i 46 mount | grep -q " ${nullfs_dstdir}$i " && 47 umount ${nullfs_dstdir}$i 48 done 49 50 # start the parallel tests 51 for i in `jot $mounts`; do 52 ./$0 $i & 53 done 54 wait 55 56 for i in `jot $mounts`; do 57 umount ${nullfs_dstdir}$i > /dev/null 2>&1 58 done 59 exit 0 60else 61 # The test: Parallel mount and unmounts 62 start=`date '+%s'` 63 while [ `date '+%s'` -lt $((start + 300)) ]; do 64 m=$1 65 mount_nullfs $nullfs_srcdir ${nullfs_dstdir}$m > \ 66 /dev/null 2>&1 67 opt=`[ $(( m % 2 )) -eq 0 ] && echo -f` 68 while mount | grep -q ${nullfs_dstdir}$m; do 69 umount $opt ${nullfs_dstdir}$m > /dev/null 2>&1 70 done 71 done 72fi 73