1#!/bin/sh 2 3# 4# Copyright (c) 2009 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# Test scenario for a lock cascade problem with sending SIGSTOP to processes 30# accessing a NFS intr mount. 31 32[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 33 34. ../default.cfg 35 36[ -z "$nfs_export" ] && exit 0 37ping -c 2 `echo $nfs_export | sed 's/:.*//'` > /dev/null 2>&1 || 38 exit 0 39 40[ ! -d $mntpoint ] && mkdir $mntpoint 41mount | grep "$mntpoint" | grep nfs > /dev/null && umount $mntpoint 42mount -t nfs -o nfsv3,tcp,nolockd -o retrycnt=3 -o intr,soft -o rw \ 43 $nfs_export $mntpoint 44sleep .2 45 46wdir=$mntpoint/nfs8.sh.dir 47mkdir -p $wdir 48jot 1000 | xargs -I% touch $wdir/% 49for i in `jot 10`; do 50 find $mntpoint > /dev/null 2>&1 & 51 sleep 0.1 52 kill -s STOP $! 53 pids="$pids $!" 54done 55rm -rf $wdir 56 57umount $mntpoint 2>&1 | grep -v "Device busy" 58while mount | grep -q $mntpoint; do 59 umount -f $mntpoint > /dev/null 2>&1 60done 61 62kill -s CONT $pids 63for pid in $pids; do 64 wait $pid 65done 66exit 0 67