1#!/bin/sh 2 3# 4# Copyright (c) 2013 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[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 30 31. ../default.cfg 32 33# Variation of newfs4.sh, using a swap backed MD disk 34 35odir=`pwd` 36cd /tmp 37sed '1,/^EOF/d' < $odir/$0 > newfs5.c 38mycc -o newfs5 -Wall -Wextra newfs5.c 39rm -f newfs5.c 40cd $odir 41 42mount | grep "$mntpoint" | grep md$mdstart > /dev/null && umount $mntpoint 43mdconfig -l | grep -q md$mdstart && mdconfig -d -u $mdstart 44 45blocksize="-b 65536" 46opt="-O2 -U" 47size=9 # Gb 48mdconfig -a -t swap -s ${size}g -u $mdstart 49newfs $blocksize $opt md$mdstart > /dev/null 50mount /dev/md$mdstart $mntpoint 51 52cd $mntpoint 53truncate -s 2g f1 54truncate -s 2g f2 55truncate -s 2g f3 56truncate -s 2g f4 57/tmp/newfs5 f1 & 58/tmp/newfs5 f2 & 59/tmp/newfs5 f3 & 60/tmp/newfs5 f4 & 61wait 62 63while mount | grep "$mntpoint" | grep -q md$mdstart; do 64 umount -f $mntpoint || sleep 1 65done 66checkfs /dev/md$mdstart; s=$? 67 68mdconfig -d -u $mdstart 69rm -f $diskimage 70rm -f /tmp/newfs5 71exit $s 72 73EOF 74#include <sys/types.h> 75#include <sys/stat.h> 76#include <err.h> 77#include <fcntl.h> 78#include <stdio.h> 79#include <stdlib.h> 80#include <unistd.h> 81 82/* Perform random IO operations on a file */ 83 84int 85main(int argc, char **argv) 86{ 87 struct stat sb; 88 char buf[256]; 89 off_t bp, maxb; 90 int fd; 91 long i; 92 93 if (argc != 2) { 94 fprintf(stderr, "Usage %s: file\n", argv[0]); 95 return (1); 96 } 97 if ((fd = open(argv[1], O_RDWR)) == -1) 98 err(1, "open(%s)", argv[1]); 99 if (fstat(fd, &sb) == -1) 100 err(1, "fstatf(stdin)"); 101 maxb = sb.st_size - sizeof(buf); 102 103 for (i = 0; i < 10000; i++) { 104 bp = arc4random(); 105 bp = (bp << 31 | arc4random()) % maxb; 106 107 if (lseek(fd, bp, 0) == -1) 108 err(1, "lseek()"); 109 if (write(fd, buf, sizeof(buf)) != sizeof(buf)) 110 err(1, "write()"); 111 } 112 close(fd); 113 114 return (0); 115} 116