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
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
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
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