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#!/bin/sh
#
# Copyright (c) 2009 Peter Holm <pho@FreeBSD.org>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# Test scenario with a 20G files on two UFS2 FSs with 64k/64k
# Test program will hang (deadlock) in "nbufkv"
# Test scenario by John-Mark Gurney <jmg at funkthat dot com>
[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
. ../default.cfg
dir=`dirname $diskimage`
d1=$dir/diskimage1
d2=$dir/diskimage2
rm -f $d1 $d2
size=20 # G
avail=$((`sysctl -n hw.physmem` / 1024 / 1024 / 1024))
[ $((size * 2)) -gt $avail ] && size=$((avail / 2))
[ `df -k $dir | tail -1 | awk '{print $4}'` -lt \
$((size * 2 * 1024 * 1024)) ] &&
echo "Not enough disk space on $dir." && exit 0
odir=`pwd`
USE_TIMEOUT=1
cd /tmp
sed '1,/^EOF/d' < $odir/$0 > nbufkv.c
mycc -o nbufkv -Wall nbufkv.c
rm -f nbufkv.c
cd $odir
u1=$mdstart
u2=$((u1 + 1))
mp1=$mntpoint
mp2=${mntpoint}2
[ -d $mp1 ] || mkdir $mp1
[ -d $mp2 ] || mkdir $mp2
dd if=/dev/zero of=$d1 bs=1m count=${size}k status=none || exit 1
cp $d1 $d2 || exit 1
mount | grep -q /dev/md$u2 && umount -f /dev/md$u2
mount | grep -q /dev/md$u1 && umount -f /dev/md$u1
[ -c /dev/md$u2 ] && mdconfig -d -u $u2
[ -c /dev/md$u1 ] && mdconfig -d -u $u1
mdconfig -a -t vnode -f $d1 -u $u1 || exit 1
newfs -b 65536 -f 65536 -O2 md$u1 > /dev/null
mdconfig -a -t vnode -f $d2 -u $u2 || exit 1
newfs -b 65536 -f 65536 -O2 md$u2 > /dev/null
mount /dev/md$u1 $mp1
mount /dev/md$u2 $mp2
/tmp/nbufkv $mp1 &
/tmp/nbufkv $mp2 &
wait
umount /dev/md$u2
umount /dev/md$u1
mount | grep -q /dev/md$u2 && umount -f /dev/md$u2
mount | grep -q /dev/md$u1 && umount -f /dev/md$u1
mdconfig -d -u $u2
mdconfig -d -u $u1
rm -rf $d1 $d2 /tmp/nbufkv
exit
EOF
#include <sys/param.h>
#include <err.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
void
handler(int i) {
fprintf(stderr, "FAIL. Timerout.\n");
_exit(0);
}
void
work(int fd, size_t n)
{
int i;
for (i = 0; i < 128 * 1024; i++) {
n = n - PAGE_SIZE;
if (lseek(fd, n , SEEK_SET) == -1)
err(1, "lseek()");
if (write(fd, "1", 1) != 1)
err(1, "write()");
}
}
int
main(int argc, char **argv)
{
int fd;
off_t len;
char path[128];
len = 20;
len = len * 1024 * 1024 * 1024;
sprintf(path, "%s/nbufkv.%06d", argv[1], getpid());
if ((fd = open(path, O_CREAT | O_TRUNC | O_RDWR, 0640)) == -1)
err(1,"open(%s)", path);
if (ftruncate(fd, len) == -1)
err(1, "ftruncate");
signal(SIGALRM, handler);
alarm(1200);
work(fd, len);
close(fd);
if (unlink(path) == -1)
err(1, "unlink(%s)", path);
return (0);
}
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