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
setup(int nb)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
cleanup(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
test(void)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