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/mount.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 int pct;
47 int64_t in;
48 int64_t bl;
49 int64_t reserve_in;
50 int64_t reserve_bl;
51
52 umask(0);
53 path[0] = 0;
54 if (nb == 0) {
55 getdf(&bl, &in);
56 size = in / op->incarnations;
57
58 pct = 90;
59 if (op->hog == 0)
60 pct = random_int(1, 90);
61 size = size / 100 * pct + 1;
62
63 if (size > 1000)
64 size = 1000; /* Due to Soft Update lag */
65
66 /* Resource requirements: */
67 while (size > 0) {
68 reserve_in = 1 * size * op->incarnations + size;
69 reserve_bl = 29 * size * op->incarnations;
70 if (reserve_bl <= bl && reserve_in <= in)
71 break;
72 size--;
73 }
74 if (size == 0)
75 reserve_bl = reserve_in = 0;
76
77 if (op->verbose > 1)
78 printf("creat(size=%lu, incarnations=%d). Free(%jdk, %jd), reserve(%jdk, %jd)\n",
79 size, op->incarnations, bl/1024, in, reserve_bl/1024, reserve_in);
80 reservedf(reserve_bl, reserve_in);
81 putval(size);
82 } else {
83 size = getval();
84 }
85
86 if (size == 0)
87 exit(0);
88 sprintf(path,"%s.%05d", getprogname(), getpid());
89 if (mkdir(path, 0770) < 0)
90 err(1, "mkdir(%s), %s:%d", path, __FILE__, __LINE__);
91
92 if (chdir(path) == -1)
93 err(1, "chdir(%s), %s:%d", path, __FILE__, __LINE__);
94
95 return (0);
96 }
97
98 void
cleanup(void)99 cleanup(void)
100 {
101 (void)chdir("..");
102 if (path[0] != 0 && rmdir(path) == -1) {
103 warn("rmdir(%s), %s:%d", path, __FILE__, __LINE__);
104 }
105 }
106
107 int
test(void)108 test(void)
109 {
110 int fd, i, j;
111 pid_t pid;
112 char file[128];
113
114 pid = getpid();
115 for (j = 0; j < (int)size && done_testing == 0; j++) {
116 sprintf(file,"p%05d.%05d", pid, j);
117 if ((fd = creat(file, 0660)) == -1) {
118 if (errno != EINTR) {
119 warn("creat(%s). %s:%d", file, __FILE__, __LINE__);
120 break;
121 }
122 }
123 if (fd != -1 && close(fd) == -1)
124 err(2, "close(%d)", j);
125
126 }
127
128 for (i = --j; i >= 0; i--) {
129 sprintf(file,"p%05d.%05d", pid, i);
130 if (unlink(file) == -1)
131 warn("unlink(%s)", file);
132
133 }
134
135 return (0);
136 }
137