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# $FreeBSD$ 29# 30 31# Test scenario for a lock cascade problem with sending SIGSTOP to processes 32# accessing a NFS intr mount. 33 34[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 35 36. ../default.cfg 37 38[ ! -d $mntpoint ] && mkdir $mntpoint 39mount | grep "$mntpoint" | grep nfs > /dev/null && umount $mntpoint 40mount -t nfs -o nfsv3,tcp,nolockd -o retrycnt=3 -o intr -o soft -o rw 127.0.0.1:/tmp $mntpoint 41 42pids="" 43for i in `jot 10`; do 44 find $mntpoint > /dev/null 2>&1 & 45 sleep 0.1 46 kill -s STOP $! 47 pids="$pids $!" 48done 49 50umount $mntpoint 2>&1 | grep -v "Device busy" 51while mount | grep -q $mntpoint; do 52 umount -f $mntpoint > /dev/null 2>&1 53done 54 55kill -s CONT $pids 56for i in `jot 10`; do 57 wait 58done 59