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/mount.h> 30 #include <sys/stat.h> 31 #include <err.h> 32 #include <errno.h> 33 #include <fcntl.h> 34 #include <stdio.h> 35 #include <stdlib.h> 36 #include <unistd.h> 37 38 #include "stress.h" 39 40 static char path[128]; 41 static unsigned long size; 42 43 int 44 setup(int nb) 45 { 46 int64_t in; 47 int64_t bl; 48 int64_t reserve_in; 49 int64_t reserve_bl; 50 int pct; 51 52 umask(0); 53 if (nb == 0) { 54 getdf(&bl, &in); 55 size = in / op->incarnations; 56 57 pct = 90; 58 if (op->hog == 0) 59 pct = random_int(1, 90); 60 size = size / 100 * pct + 1; 61 62 if (size > 16000) 63 size = 16000; /* arbitrary limit number of files pr. dir */ 64 65 /* Resource requirements: */ 66 while (size > 0) { 67 reserve_in = 1 * size * op->incarnations + op->incarnations; 68 reserve_bl = 26 * size * op->incarnations; 69 if (reserve_bl <= bl && reserve_in <= in) 70 break; 71 size = size / 2; 72 } 73 if (size == 0) 74 reserve_bl = reserve_in = 0; 75 76 if (op->verbose > 1) 77 printf("symlink(size=%lu, incarnations=%d). Free(%jdk, %jd), reserve(%jdk, %jd)\n", 78 size, op->incarnations, bl/1024, in, reserve_bl/1024, reserve_in); 79 reservedf(reserve_bl, reserve_in); 80 putval(size); 81 } else { 82 size = getval(); 83 } 84 if (size == 0) 85 exit(0); 86 87 sprintf(path,"%s.%05d", getprogname(), getpid()); 88 if (mkdir(path, 0770) < 0) 89 err(1, "mkdir(%s), %s:%d", path, __FILE__, __LINE__); 90 91 if (chdir(path) == -1) 92 err(1, "chdir(%s), %s:%d", path, __FILE__, __LINE__); 93 94 return (0); 95 } 96 97 void 98 cleanup(void) 99 { 100 if (path[0] != 0) { 101 (void)chdir(".."); 102 if (rmdir(path) == -1) { 103 warn("rmdir(%s), %s:%d", path, __FILE__, __LINE__); 104 } 105 } 106 } 107 108 int 109 test(void) 110 { 111 pid_t pid; 112 int i, j, error = 0; 113 char file[128]; 114 115 pid = getpid(); 116 for (j = 0; j < (int)size && done_testing == 0; j++) { 117 sprintf(file,"p%05d.%05d", pid, j); 118 if (symlink("/tmp/not/there", file) == -1) { 119 if (errno != EINTR) { 120 warn("symlink(%s). %s.%d", file, __FILE__, __LINE__); 121 error = 1; 122 exit(1); 123 break; 124 } 125 } 126 } 127 128 for (i = --j; i >= 0; i--) { 129 sprintf(file,"p%05d.%05d", pid, i); 130 if (unlink(file) == -1) 131 err(3, "unlink(%s)", file); 132 } 133 134 if (error != 0) 135 exit(1); 136 137 return (0); 138 } 139