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
setup(int nb)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
cleanup(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
test(void)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