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# $FreeBSD$ 29# 30 31[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 32 33 34. ../default.cfg 35 36# Deadlock problems. Test scenario by Lev Serebryakov <lev@freebsd.org> 37# newfs -O2 -U -b 65536 38# The io programs will get stuck in nbufkv wait state. 39 40odir=`pwd` 41cd /tmp 42sed '1,/^EOF/d' < $odir/$0 > io.c 43cc -o io -Wall io.c 44rm -f io.c 45cd $odir 46 47mount | grep "$mntpoint" | grep md${mdstart}${part} > /dev/null && umount $mntpoint 48mdconfig -l | grep md$mdstart > /dev/null && mdconfig -d -u $mdstart 49 50size=9 # Gb 51[ `df -k $(dirname $diskimage) | tail -1 | awk '{print $4'}` -lt $((size * 1024 * 1024)) ] && \ 52 echo "Not enough disk space." && exit 1 53truncate -s ${size}G $diskimage 54 55blocksize="-b 65536" 56opt="-O2 -U" 57mdconfig -a -t vnode -f $diskimage -u $mdstart 58bsdlabel -w md$mdstart auto 59newfs $blocksize $opt md${mdstart}${part} > /dev/null 60mount /dev/md${mdstart}${part} $mntpoint 61 62cd $mntpoint 63truncate -s 2g f1 64truncate -s 2g f2 65truncate -s 2g f3 66truncate -s 2g f4 67/tmp/io f1 & 68/tmp/io f2 & 69/tmp/io f3 & 70/tmp/io f4 & 71wait;wait;wait;wait 72 73while mount | grep "$mntpoint" | grep -q md${mdstart}${part}; do 74 umount -f $mntpoint > /dev/null 2>&1 75done 76 77mdconfig -d -u $mdstart 78rm -f $diskimage 79rm -f $RUNDIR/fsx.$$.* 80rm -f /tmp/io 81exit 82 83EOF 84#include <stdio.h> 85#include <stdlib.h> 86#include <unistd.h> 87#include <fcntl.h> 88#include <sys/types.h> 89#include <sys/stat.h> 90#include <err.h> 91 92/* Perform random IO operations on a file */ 93 94int 95main(int argc, char **argv) 96{ 97 struct stat sb; 98 char buf[256]; 99 off_t bp, maxb; 100 int fd; 101 long i; 102 103 if (argc != 2) { 104 fprintf(stderr, "Usage %s: file\n", argv[0]); 105 return (1); 106 } 107 if ((fd = open(argv[1], O_RDWR)) == -1) 108 err(1, "open(%s)", argv[1]); 109 if (fstat(fd, &sb) == -1) 110 err(1, "fstatf(stdin)"); 111 maxb = sb.st_size - sizeof(buf); 112 113 for (i = 0; i < 10000; i++) { 114 bp = arc4random(); 115 bp = (bp << 31 | arc4random()) % maxb; 116// printf("%jd\n", bp); 117 118 if (lseek(fd, bp, 0) == -1) 119 err(1, "lseek()"); 120 if (write(fd, buf, sizeof(buf)) != sizeof(buf)) 121 err(1, "write()"); 122 } 123 close(fd); 124 125 return (0); 126} 127