1 /*- 2 * Copyright (c) 2008 Peter Holm <pho@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 */ 27 28 #include <sys/param.h> 29 #include <sys/stat.h> 30 #include <sys/wait.h> 31 32 #include <err.h> 33 #include <fcntl.h> 34 #include <signal.h> 35 #include <stdio.h> 36 #include <stdlib.h> 37 #include <string.h> 38 #include <unistd.h> 39 40 #include "stress.h" 41 42 static char path[MAXPATHLEN+1]; 43 static int bufsize, freespace; 44 45 static void 46 reader(void) { 47 fd_set set; 48 struct timeval tv; 49 int *buf, fd, n; 50 51 setproctitle("reader"); 52 if ((fd = open(path, O_RDONLY | O_NONBLOCK)) < 0) 53 err(1, "open(%s)", path); 54 if ((buf = malloc(bufsize)) == NULL) 55 err(1, "malloc(%d), %s:%d", bufsize, __FILE__, __LINE__); 56 n = 0; 57 FD_ZERO(&set); 58 FD_SET(fd, &set); 59 tv.tv_sec = 10; 60 tv.tv_usec = 0; 61 if (select(fd + 1, &set, NULL, NULL, &tv) == 1) { 62 if ((n = read(fd, buf, bufsize)) < 0) 63 err(1, "read(), %s:%d", __FILE__, __LINE__); 64 } 65 close(fd); 66 free(buf); 67 } 68 69 static void 70 writer(void) { 71 int *buf, fd; 72 73 setproctitle("writer"); 74 if ((fd = open(path, O_WRONLY)) < 0) { 75 unlink(path); 76 err(1, "open(%s)", path); 77 } 78 if ((buf = malloc(bufsize)) == NULL) 79 err(1, "malloc(%d), %s:%d", bufsize, __FILE__, __LINE__); 80 memset(buf, 0, bufsize); 81 82 if (write(fd, buf, bufsize) < 0) 83 err(1, "write(%d), %s:%d", fd, __FILE__, __LINE__); 84 close(fd); 85 free(buf); 86 } 87 88 int 89 setup(int nb) 90 { 91 int64_t bl; 92 int64_t in; 93 int64_t reserve_bl; 94 int64_t reserve_in; 95 96 if (nb == 0) { 97 getdf(&bl, &in); 98 99 /* Resource requirements: */ 100 reserve_in = 200 * op->incarnations; 101 reserve_bl = 2048 * op->incarnations; 102 freespace = (reserve_bl <= bl && reserve_in <= in); 103 if (!freespace) 104 reserve_bl = reserve_in = 0; 105 106 if (op->verbose > 1) 107 printf("mkfifo(incarnations=%d). Free(%jdk, %jd), reserve(%jdk, %jd)\n", 108 op->incarnations, bl/1024, in, reserve_bl/1024, reserve_in); 109 reservedf(reserve_bl, reserve_in); 110 putval(freespace); 111 fflush(stdout); 112 } else { 113 freespace = getval(); 114 } 115 if (!freespace) 116 _exit(0); 117 bufsize = 2 << random_int(2, 12); 118 119 return (0); 120 } 121 122 void 123 cleanup(void) 124 { 125 } 126 127 int 128 test(void) 129 { 130 pid_t pid; 131 int i, status; 132 133 for (i = 0; i < 100; i++) { 134 if (sprintf(path, "fifo.%d.%d", getpid(), i) < 0) 135 err(1, "sprintf()"); 136 if (mkfifo(path, 0600) < 0) 137 err(1, "mkfifo(%s)", path); 138 } 139 for (i = 0; i < 100; i++) { 140 if (sprintf(path, "fifo.%d.%d", getpid(), i) < 0) 141 err(1, "sprintf()"); 142 if (unlink(path) < 0) 143 err(1, "unlink(%s)", path); 144 } 145 146 if (sprintf(path, "fifo.%d", getpid()) < 0) 147 err(1, "sprintf()"); 148 if (mkfifo(path, 0600) < 0) 149 err(1, "mkfifo(%s)", path); 150 151 if ((pid = fork()) == 0) { 152 writer(); 153 _exit(EXIT_SUCCESS); 154 155 } else if (pid > 0) { 156 reader(); 157 kill(pid, SIGINT); 158 if (waitpid(pid, &status, 0) == -1) 159 warn("waitpid(%d)", pid); 160 } else 161 err(1, "fork(), %s:%d", __FILE__, __LINE__); 162 163 unlink(path); 164 165 return (0); 166 } 167