1#!/bin/sh 2 3# 4# Copyright (c) 2010 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# "panic: general protection fault" seen: 32# https://people.freebsd.org/~pho/stress/log/log0398.txt 33 34. ../default.cfg 35 36here=`pwd` 37cd /tmp 38sed '1,/^EOF/d' < $here/$0 > suj5.c 39mycc -o suj5 -Wall -O2 suj5.c 40rm -f suj5.c 41cd $here 42 43mount | grep $mntpoint | grep -q /dev/md && umount -f $mntpoint 44mdconfig -l | grep -q md$mdstart && mdconfig -d -u $mdstart 45mdconfig -a -t swap -s 1g -u $mdstart 46newfs -j md$mdstart > /dev/null 47mount /dev/md$mdstart $mntpoint 48chmod 777 $mntpoint 49 50su $testuser -c "cd $mntpoint; /tmp/suj5" > /dev/null 51 52while mount | grep $mntpoint | grep -q /dev/md; do 53 umount $mntpoint || sleep 1 54done 55mdconfig -d -u $mdstart 56rm -f /tmp/suj5 57exit 58EOF 59#include <sys/param.h> 60#include <sys/mount.h> 61#include <sys/stat.h> 62#include <sys/wait.h> 63#include <err.h> 64#include <fcntl.h> 65#include <stdio.h> 66#include <stdlib.h> 67#include <unistd.h> 68 69#define PARALLEL 10 70 71static int 72random_int(int mi, int ma) 73{ 74 return (arc4random() % (ma - mi + 1) + mi); 75} 76 77static int64_t 78df(void) 79{ 80 char path[MAXPATHLEN+1]; 81 struct statfs buf; 82 83 if (getcwd(path, sizeof(path)) == NULL) 84 err(1, "getcwd()"); 85 86 if (statfs(path, &buf) < 0) 87 err(1, "statfs(%s)", path); 88 printf("Free space on %s: %jd Mb\n", path, buf.f_bavail * buf.f_bsize / 1024 / 1024); 89 return (buf.f_bavail * buf.f_bsize); 90} 91 92static void 93test(int size) 94{ 95 int buf[1024], index, to; 96#ifdef TEST 97 int i; 98#endif 99 int fd; 100 char file[128]; 101 102 sprintf(file,"p%05d", getpid()); 103 if ((fd = creat(file, 0660)) == -1) 104 err(1, "creat(%s)", file); 105 106 to = sizeof(buf); 107 index = 0; 108 while (index < size) { 109 if (index + to > size) 110 to = size - index; 111#ifdef TEST 112 for (i = 0; i < to; i++) 113 buf[i] = index + i; 114#endif 115 index += to; 116 if (write(fd, buf, to) != to) 117 err(1, "write(%s), %s:%d", file, __FILE__, __LINE__); 118 } 119 if (close(fd) == -1) 120 err(1, "close(%s), %s:%d", file, __FILE__, __LINE__); 121 122 if ((fd = open(file, O_RDONLY)) == -1) 123 err(1, "open(%s), %s:%d", file, __FILE__, __LINE__); 124 125 index = 0; 126 while (index < size) { 127 if (index + to > size) 128 to = size - index; 129 if (read(fd, buf, to) != to) 130 err(1, "rw read. %s.%d", __FILE__, __LINE__); 131#ifdef TEST 132 for (i = 0; i < to; i++) { 133 if (buf[i] != index + i) { 134 fprintf(stderr, 135 "%s, pid %d: expected %d @ %d, got %d\n", 136 getprogname(), getpid(), index+i, index+i, 137 buf[i]); 138 exit(EXIT_FAILURE); 139 } 140 } 141#endif 142 index += to; 143 } 144 if (close(fd) == -1) 145 err(1, "close(%s), %s:%d", file, __FILE__, __LINE__); 146 if (unlink(file) == -1) 147 err(1, "unlink(%s), %s:%d", file, __FILE__, __LINE__); 148 exit(0); 149} 150 151int 152main() 153{ 154 int i, j, pct; 155 int size; /* in k */ 156 int64_t bl; 157 158 bl = df(); 159 if (bl > (int64_t)INT_MAX * PARALLEL) 160 bl = (int64_t)INT_MAX * PARALLEL; 161 size = bl / PARALLEL / 1024; 162 163 pct = random_int(1, 50); 164 size = size / 100 * pct + 1; 165 if (random_int(1, 100) <= 50) 166 size = 34 * 1024; /* Known good deadlock value */ 167 printf("Max file size: %d Mb\n", size / 1024); 168 169 for (i = 0; i < 100; i++) { 170 for (j = 0; j < PARALLEL; j++) { 171 if (fork() == 0) { 172 test(random_int(1, size) * 1024); 173 } 174 } 175 for (j = 0; j < PARALLEL; j++) 176 wait(NULL); 177 } 178 179 return (0); 180} 181