1#!/bin/sh 2 3# 4# SPDX-License-Identifier: BSD-2-Clause-FreeBSD 5# 6# Copyright (c) 2019 Dell EMC Isilon 7# 8# Redistribution and use in source and binary forms, with or without 9# modification, are permitted provided that the following conditions 10# are met: 11# 1. Redistributions of source code must retain the above copyright 12# notice, this list of conditions and the following disclaimer. 13# 2. Redistributions in binary form must reproduce the above copyright 14# notice, this list of conditions and the following disclaimer in the 15# documentation and/or other materials provided with the distribution. 16# 17# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27# SUCH DAMAGE. 28# 29 30# fcntl(2) fuzz 31# "umount: unmount of /mnt failed: Device busy" seen: 32# https://people.freebsd.org/~pho/stress/log/fcntl2.txt 33 34. ../default.cfg 35[ `id -u` -ne 0 ] && echo "Must be root!" && exit 1 36 37dir=/tmp 38odir=`pwd` 39cd $dir 40sed '1,/^EOF/d' < $odir/$0 > $dir/fcntl2.c 41mycc -o fcntl2 -Wall -Wextra -O0 -g fcntl2.c || exit 1 42rm -f fcntl2.c 43cd $odir 44 45set -e 46mount | grep "on $mntpoint " | grep -q /dev/md && umount -f $mntpoint 47[ -c /dev/md$mdstart ] && mdconfig -d -u $mdstart 48mdconfig -a -t swap -s 2g -u $mdstart 49newfs $newfs_flags md$mdstart > /dev/null 50mount /dev/md$mdstart $mntpoint 51set +e 52 53(cd $odir/../testcases/swap; ./swap -t 3m -i 20) & 54cd $mntpoint 55limits -n 10000 $dir/fcntl2 56s=$? 57[ -f fcntl2.core -a $s -eq 0 ] && 58 { ls -l fcntl2.core; mv fcntl2.core $dir; s=1; } 59cd $odir 60while pkill swap; do :; done 61 62for i in `jot 6`; do 63 mount | grep -q "on $mntpoint " || break 64 umount $mntpoint && break || sleep 10 65 [ $i -eq 6 ] && 66 { echo FATAL; fstat -mf $mntpoint; exit 1; } 67done 68mdconfig -d -u $mdstart 69rm -rf $dir/fcntl2 70exit $s 71 72EOF 73#include <sys/param.h> 74#include <sys/mman.h> 75#include <sys/stat.h> 76#include <sys/wait.h> 77 78#include <machine/atomic.h> 79 80#include <err.h> 81#include <errno.h> 82#include <fcntl.h> 83#include <stdio.h> 84#include <stdlib.h> 85#include <time.h> 86#include <unistd.h> 87 88static volatile u_int *share; 89 90#define PARALLEL 64 91#define RUNTIME (3 * 60) 92#define SYNC 0 93 94#define N (128 * 1024 / (int)sizeof(u_int32_t)) 95static u_int32_t r[N]; 96 97static unsigned long 98makearg(void) 99{ 100 unsigned long val; 101 unsigned int i; 102 103 val = arc4random(); 104 i = arc4random() % 100; 105 if (i < 20) 106 val = val & 0xff; 107 if (i >= 20 && i < 40) 108 val = val & 0xffff; 109 if (i >= 40 && i < 60) 110 val = (unsigned long)(r) | (val & 0xffff); 111#if defined(__LP64__) 112 if (i >= 60) { 113 val = (val << 32) | arc4random(); 114 if (i > 80) 115 val = val & 0x00007fffffffffffUL; 116 } 117#endif 118 119 return (val); 120} 121static void 122test(void) 123{ 124 time_t start; 125 unsigned long arg3; 126 int cmd, fd, i, n, success; 127 char file[80]; 128 129 atomic_add_int(&share[SYNC], 1); 130 while (share[SYNC] != PARALLEL) 131 ; 132 133 success = 0; 134 snprintf(file, sizeof(file), "file.%d", getpid()); 135 if ((fd = open(file, O_RDWR | O_CREAT | O_TRUNC, DEFFILEMODE)) 136 == -1) 137 err(1, "open(%s)", file); 138 n = arc4random() % 100 + 1; 139 for (i = 0; i < n; i++) 140 if (write(fd, file, sizeof(file)) != sizeof(file)) 141 err(1, "write()"); 142 start = time(NULL); 143 while (time(NULL) - start < 60) { 144 cmd = arc4random() % 20; 145 arg3 = makearg(); 146 alarm(20); 147 if (fcntl(fd, cmd, arg3) != -1) 148 success++; 149 alarm(0); 150 } 151 close(fd); 152 unlink(file); 153 154 _exit(0); 155} 156 157int 158main(void) 159{ 160 pid_t pids[PARALLEL]; 161 size_t len; 162 time_t start; 163 int i, status; 164 165 len = PAGE_SIZE; 166 if ((share = mmap(NULL, len, PROT_READ | PROT_WRITE, 167 MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED) 168 err(1, "mmap"); 169 170 start = time(NULL); 171 while ((time(NULL) - start) < RUNTIME) { 172 for (i = 0; i < N; i++) 173 r[i] = arc4random(); 174 share[SYNC] = 0; 175 for (i = 0; i < PARALLEL; i++) { 176 if ((pids[i] = fork()) == 0) 177 test(); 178 if (pids[i] == -1) 179 err(1, "fork()"); 180 } 181 for (i = 0; i < PARALLEL; i++) { 182 if (waitpid(pids[i], &status, 0) == -1) 183 err(1, "waitpid(%d)", pids[i]); 184 } 185 } 186 187 return (0); 188} 189