1#!/bin/sh 2 3# 4# Copyright (c) 2011 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# Test that fails on various non FreeBSD file systems. 32# 3.13.0-74-generic #118-Ubuntu SMP: Mismatch @ count 214, 0 != 123 33# OK on OS X (Darwin Kernel Version 15.5.0) 34 35# Scanario by: Michael Ubell ubell mindspring com. 36 37. ../default.cfg 38 39mount | grep $mntpoint | grep -q /dev/md && umount -f $mntpoint 40mdconfig -l | grep -q md$mdstart && mdconfig -d -u $mdstart 41 42sed '1,/^EOF/d' < $0 > /tmp/overlap.c 43mycc -o /tmp/overlap -Wall -Wextra -O2 /tmp/overlap.c -lpthread || exit 1 44rm -f /tmp/overlap.c 45 46size="1g" 47mdconfig -a -t swap -s $size -u $mdstart || exit 1 48 49newfs -U md$mdstart > /dev/null 50 51mount /dev/md$mdstart $mntpoint 52chmod 777 $mntpoint 53 54(cd $mntpoint; /tmp/overlap) 55s=$? 56 57while mount | grep $mntpoint | grep -q /dev/md; do 58 umount $mntpoint || sleep 1 59done 60mdconfig -d -u $mdstart 61rm -f /tmp/overlap 62exit $s 63EOF 64#include <err.h> 65#include <fcntl.h> 66#include <pthread.h> 67#include <signal.h> 68#include <stdio.h> 69#include <stdlib.h> 70#include <sys/types.h> 71#include <sys/uio.h> 72#include <unistd.h> 73 74char file[128]; 75int bsiz, siz; 76 77void 78handler(int s __unused) 79{ 80 _exit(0); 81} 82 83void * 84writer(void *arg __unused) { 85 int fdes, count; 86 ssize_t nwrite; 87 int *buf; 88 89 if ((fdes = open(file, O_RDWR|O_CREAT, 0664)) == -1) 90 err(1, "open(%s)", file); 91 92 count = 0; 93 buf = malloc(bsiz * sizeof(int)); 94 buf[0] = buf[bsiz - 1] = 0; 95 while ((nwrite = pwrite(fdes, buf, siz, 0)) != -1) { 96 if (nwrite < siz) 97 err(1, "pwrite @ count %d, nwrite %zd", count, nwrite); 98 buf[0] = ++buf[bsiz - 1]; 99 count++; 100 } 101 102 err(1, "pwrite()"); 103} 104 105void * 106reader(void *arg __unused) { 107 int fdes, count; 108 ssize_t nread; 109 int *buf; 110 111 if ((fdes = open(file, O_RDWR|O_CREAT, 0664)) == -1) 112 err(1, "open(%s)", file); 113 count = 0; 114 115 buf = malloc(bsiz * sizeof(int)); 116 while ((nread = pread(fdes, buf, siz, 0)) == 0) 117 continue; 118 119 do { 120 if (nread < siz) 121 err(1, "pread @ count %d, nread %zd", count, nread); 122 if (buf[0] != buf[bsiz - 1]) { 123 printf("Mismatch @ count %d, %d != %d\n", 124 count, buf[0], buf[bsiz - 1]); 125 abort(); 126 } 127 count++; 128 } while ((nread = pread(fdes, buf, siz, 0)) != -1); 129 130 err(1, "pread()"); 131} 132 133int 134main(int argc, char **argv) { 135 pthread_t rp, wp; 136 int ret; 137 void *exitstatus; 138 139 snprintf(file, sizeof(file), "test.%0d5", getpid()); 140 siz = 65536; 141 if (argc == 2) 142 siz = atoi(argv[1]); 143 144 bsiz = siz / sizeof(int); 145 146 signal(SIGALRM, handler); 147 alarm(300); 148 149 if ((ret = pthread_create(&wp, NULL, writer, NULL)) != 0) 150 errc(1, ret, "pthread_create"); 151 if ((ret = pthread_create(&rp, NULL, reader, NULL)) != 0) 152 errc(1, ret, "pthread_create"); 153 154 pthread_join(rp, &exitstatus); 155 pthread_join(wp, &exitstatus); 156 157 unlink(file); 158 return (0); 159} 160