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 <unistd.h> 29 #include <stdio.h> 30 #include <stdlib.h> 31 #include <fcntl.h> 32 #include <string.h> 33 #include <sys/stat.h> 34 #include <sys/param.h> 35 #include <sys/syslimits.h> 36 #include <err.h> 37 #include <errno.h> 38 39 #include "stress.h" 40 41 static char path[128]; 42 static unsigned long size; 43 44 int 45 setup(int nb) 46 { 47 int pct; 48 int64_t in; 49 int64_t bl; 50 int64_t reserve_in; 51 int64_t reserve_bl; 52 53 umask(0); 54 path[0] = 0; 55 if (nb == 0) { 56 getdf(&bl, &in); 57 size = in / op->incarnations; 58 59 pct = 90; 60 if (op->hog == 0) 61 pct = random_int(1, 90); 62 size = size / 100 * pct + 1; 63 64 if (size > 20000 && op->hog == 0) 65 size = 20000; /* arbitrary limit number of files pr. dir */ 66 if (size > LINK_MAX) 67 size = LINK_MAX; 68 69 70 /* Resource requirements: */ 71 reserve_in = 2 * op->incarnations + 1; 72 reserve_bl = 26 * size * op->incarnations; 73 if (reserve_bl > bl) 74 size = bl / 26 * op->incarnations; 75 if (reserve_in > in) 76 size = reserve_in = reserve_bl = 0; 77 78 if (op->verbose > 1) 79 printf("link(size=%lu, incarnations=%d). Free(%jdk, %jd), reserve(%jdk, %jd)\n", 80 size, op->incarnations, bl/1024, in, reserve_bl/1024, reserve_in); 81 reservedf(reserve_bl, reserve_in); 82 putval(size); 83 } else { 84 size = getval(); 85 } 86 if (size == 0) 87 exit (1); 88 89 sprintf(path,"%s.%05d", getprogname(), getpid()); 90 if (mkdir(path, 0770) < 0) 91 err(1, "mkdir(%s), %s:%d", path, __FILE__, __LINE__); 92 93 if (chdir(path) == -1) 94 err(1, "chdir(%s), %s:%d", path, __FILE__, __LINE__); 95 96 return (0); 97 } 98 99 void 100 cleanup(void) 101 { 102 (void)chdir(".."); 103 if (path[0] != 0 && rmdir(path) == -1) 104 warn("rmdir(%s), %s:%d", path, __FILE__, __LINE__); 105 } 106 107 int 108 test(void) 109 { 110 int fd, i, j; 111 pid_t pid; 112 char file[128]; 113 char lfile[128]; 114 115 pid = getpid(); 116 for (j = 0; j < size && done_testing == 0; j++) { 117 sprintf(file,"p%05d.%05d", pid, j); 118 if (j == 0) { 119 if ((fd = creat(file, 0660)) == -1) { 120 if (errno != EINTR) { 121 warn("creat(%s)", file); 122 break; 123 } 124 } 125 if (fd != -1 && close(fd) == -1) 126 err(2, "close(%d)", j); 127 strcpy(lfile, file); 128 } else { 129 if (link(lfile, file) == -1) { 130 if (errno != EINTR) { 131 warn("link(%s, %s)", lfile, file); 132 break; 133 } 134 } 135 } 136 137 } 138 139 for (i = --j; i >= 0; i--) { 140 sprintf(file,"p%05d.%05d", pid, i); 141 if (unlink(file) == -1) 142 err(3, "unlink(%s)", file); 143 144 } 145 146 return (0); 147 } 148