1*86d7f5d3SJohn Marino#!/bin/sh 2*86d7f5d3SJohn Marino 3*86d7f5d3SJohn Marino# 4*86d7f5d3SJohn Marino# Copyright (c) 2008 Peter Holm <pho@FreeBSD.org> 5*86d7f5d3SJohn Marino# All rights reserved. 6*86d7f5d3SJohn Marino# 7*86d7f5d3SJohn Marino# Redistribution and use in source and binary forms, with or without 8*86d7f5d3SJohn Marino# modification, are permitted provided that the following conditions 9*86d7f5d3SJohn Marino# are met: 10*86d7f5d3SJohn Marino# 1. Redistributions of source code must retain the above copyright 11*86d7f5d3SJohn Marino# notice, this list of conditions and the following disclaimer. 12*86d7f5d3SJohn Marino# 2. Redistributions in binary form must reproduce the above copyright 13*86d7f5d3SJohn Marino# notice, this list of conditions and the following disclaimer in the 14*86d7f5d3SJohn Marino# documentation and/or other materials provided with the distribution. 15*86d7f5d3SJohn Marino# 16*86d7f5d3SJohn Marino# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17*86d7f5d3SJohn Marino# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18*86d7f5d3SJohn Marino# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19*86d7f5d3SJohn Marino# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20*86d7f5d3SJohn Marino# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21*86d7f5d3SJohn Marino# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22*86d7f5d3SJohn Marino# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23*86d7f5d3SJohn Marino# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24*86d7f5d3SJohn Marino# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25*86d7f5d3SJohn Marino# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26*86d7f5d3SJohn Marino# SUCH DAMAGE. 27*86d7f5d3SJohn Marino# 28*86d7f5d3SJohn Marino# $FreeBSD$ 29*86d7f5d3SJohn Marino# 30*86d7f5d3SJohn Marino 31*86d7f5d3SJohn Marino# Demonstrate livelock with "umount -f" seen both with UFS and MSDOS 32*86d7f5d3SJohn Marino 33*86d7f5d3SJohn Marino[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 34*86d7f5d3SJohn Marino 35*86d7f5d3SJohn Marino. ../default.cfg 36*86d7f5d3SJohn Marino 37*86d7f5d3SJohn MarinoD=$diskimage 38*86d7f5d3SJohn Marinodede $D 1m 1k || exit 1 39*86d7f5d3SJohn Marino 40*86d7f5d3SJohn Marinoodir=`pwd` 41*86d7f5d3SJohn Marino 42*86d7f5d3SJohn Marinocd /tmp 43*86d7f5d3SJohn Marinosed '1,/^EOF/d' < $odir/$0 > umountf3.c 44*86d7f5d3SJohn Marinocc -o umountf3 -Wall umountf3.c 45*86d7f5d3SJohn Marinorm -f umountf3.c 46*86d7f5d3SJohn Marinocd $odir 47*86d7f5d3SJohn Marino 48*86d7f5d3SJohn Marino 49*86d7f5d3SJohn Marinomount | grep "$mntpoint" | grep md${mdstart} > /dev/null && umount $mntpoint 50*86d7f5d3SJohn Marinomdconfig -l | grep md${mdstart} > /dev/null && mdconfig -d -u ${mdstart} 51*86d7f5d3SJohn Marino 52*86d7f5d3SJohn Marinomdconfig -a -t vnode -f $D -u ${mdstart} 53*86d7f5d3SJohn Marinobsdlabel -w md${mdstart} auto 54*86d7f5d3SJohn Marinonewfs md${mdstart}${part} > /dev/null 2>&1 55*86d7f5d3SJohn Marinomount /dev/md${mdstart}${part} $mntpoint 56*86d7f5d3SJohn Marino#newfs_msdos -F 32 -b 8192 /dev/md${mdstart}a 57*86d7f5d3SJohn Marino#mount -t msdosfs /dev/md${mdstart}a $mntpoint 58*86d7f5d3SJohn Marinoexport RUNDIR=$mntpoint/stressX 59*86d7f5d3SJohn Marinofor i in `jot 25`; do 60*86d7f5d3SJohn Marino (cd /$mntpoint; /tmp/umountf3) & 61*86d7f5d3SJohn Marinodone 62*86d7f5d3SJohn Marinosleep $((4 * 60)) 63*86d7f5d3SJohn Marinoecho "umount -f $mntpoint" 64*86d7f5d3SJohn Marinoumount -f $mntpoint 65*86d7f5d3SJohn Marinomdconfig -d -u $mdstart 66*86d7f5d3SJohn Marinorm -f $D /tmp/umountf3 67*86d7f5d3SJohn Marinoexit 68*86d7f5d3SJohn MarinoEOF 69*86d7f5d3SJohn Marino 70*86d7f5d3SJohn Marino#include <stdio.h> 71*86d7f5d3SJohn Marino#include <stdlib.h> 72*86d7f5d3SJohn Marino#include <unistd.h> 73*86d7f5d3SJohn Marino#include <fcntl.h> 74*86d7f5d3SJohn Marino#include <sys/stat.h> 75*86d7f5d3SJohn Marino#include <sys/param.h> 76*86d7f5d3SJohn Marino#include <err.h> 77*86d7f5d3SJohn Marino 78*86d7f5d3SJohn Marinostatic unsigned long size = 1024 * 1024 * 2; 79*86d7f5d3SJohn Marino 80*86d7f5d3SJohn Marinoint 81*86d7f5d3SJohn Marinomain(int argc, char **argv) 82*86d7f5d3SJohn Marino{ 83*86d7f5d3SJohn Marino int buf[1024], index, to, n; 84*86d7f5d3SJohn Marino int fd; 85*86d7f5d3SJohn Marino char file[128]; 86*86d7f5d3SJohn Marino 87*86d7f5d3SJohn Marino 88*86d7f5d3SJohn Marino sprintf(file,"p%06d", getpid()); 89*86d7f5d3SJohn Marino if ((fd = open(file, O_CREAT | O_RDWR, 0666)) == -1) 90*86d7f5d3SJohn Marino err(1, "creat(%s)", file); 91*86d7f5d3SJohn Marino 92*86d7f5d3SJohn Marino to = sizeof(buf); 93*86d7f5d3SJohn Marino for (;;) { 94*86d7f5d3SJohn Marino index = 0; 95*86d7f5d3SJohn Marino while (index < size) { 96*86d7f5d3SJohn Marino if (index + to > size) 97*86d7f5d3SJohn Marino to = size - index; 98*86d7f5d3SJohn Marino index += to; 99*86d7f5d3SJohn Marino if (write(fd, buf, to) != to) 100*86d7f5d3SJohn Marino err(1, "write(%s), %s:%d", file, __FILE__, __LINE__); 101*86d7f5d3SJohn Marino } 102*86d7f5d3SJohn Marino 103*86d7f5d3SJohn Marino if (lseek(fd, 0, 0) == -1) 104*86d7f5d3SJohn Marino err(1, "lseek"); 105*86d7f5d3SJohn Marino index = 0; 106*86d7f5d3SJohn Marino while (index < size) { 107*86d7f5d3SJohn Marino if (index + to > size) 108*86d7f5d3SJohn Marino to = size - index; 109*86d7f5d3SJohn Marino if ((n = read(fd, buf, to)) != to) 110*86d7f5d3SJohn Marino err(1, "rw read(%d, %d, %d). %s.%d", n, to, index, __FILE__, __LINE__); 111*86d7f5d3SJohn Marino index += to; 112*86d7f5d3SJohn Marino } 113*86d7f5d3SJohn Marino if (lseek(fd, 0, 0) == -1) 114*86d7f5d3SJohn Marino err(1, "lseek"); 115*86d7f5d3SJohn Marino } 116*86d7f5d3SJohn Marino 117*86d7f5d3SJohn Marino if (close(fd) == -1) 118*86d7f5d3SJohn Marino err(1, "close(%s), %s:%d", file, __FILE__, __LINE__); 119*86d7f5d3SJohn Marino if (unlink(file) == -1) 120*86d7f5d3SJohn Marino err(1, "unlink(%s), %s:%d", file, __FILE__, __LINE__); 121*86d7f5d3SJohn Marino return (0); 122*86d7f5d3SJohn Marino} 123