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/mman.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 <string.h>
37 #include <unistd.h>
38
39 #include "stress.h"
40
41 static char path[128];
42
43 #define INPUTFILE "/bin/date"
44
45 int
setup(int nb)46 setup(int nb)
47 {
48 int64_t bl;
49 int64_t in;
50 int64_t reserve_bl;
51 int64_t reserve_in;
52 int freespace;
53
54 if (nb == 0) {
55 getdf(&bl, &in);
56
57 /* Resource requirements: */
58 reserve_in = 2 * op->incarnations;
59 reserve_bl = 20480 * op->incarnations;
60 freespace = (reserve_bl <= bl && reserve_in <= in);
61 if (!freespace)
62 reserve_bl = reserve_in = 0;
63
64 if (op->verbose > 1)
65 printf("mmap(incarnations=%d). Free(%jdk, %jd), reserve(%jdk, %jd)\n",
66 op->incarnations, bl/1024, in, reserve_bl/1024, reserve_in);
67 reservedf(reserve_bl, reserve_in);
68 putval(freespace);
69 } else {
70 freespace = getval();
71 }
72 if (!freespace)
73 exit(0);
74 umask(0);
75
76 sprintf(path,"%s.%05d", getprogname(), getpid());
77 if (mkdir(path, 0770) < 0)
78 err(1, "mkdir(%s), %s:%d", path, __FILE__, __LINE__);
79
80 if (chdir(path) == -1)
81 err(1, "chdir(%s), %s:%d", path, __FILE__, __LINE__);
82
83 return (0);
84 }
85
86 void
cleanup(void)87 cleanup(void)
88 {
89 (void)chdir("..");
90 if (rmdir(path) == -1) {
91 warn("rmdir(%s), %s:%d", path, __FILE__, __LINE__);
92 }
93 }
94
95 int
test(void)96 test(void)
97 {
98 struct stat statbuf;
99 pid_t pid;
100 char file[128];
101 int fdin, fdout;
102 int i;
103 char *src, *dst;
104
105 pid = getpid();
106 for (i = 0; i < 100 && done_testing == 0; i++) {
107 sprintf(file,"p%05d.%05d", pid, i);
108
109 if ((fdin = open(INPUTFILE, O_RDONLY)) < 0)
110 err(1, INPUTFILE);
111
112 if ((fdout = open(file, O_RDWR | O_CREAT | O_TRUNC, 0600)) < 0)
113 err(1, "%s", file);
114
115 if (fstat(fdin, &statbuf) < 0)
116 err(1, "fstat error");
117
118 if (lseek(fdout, statbuf.st_size - 1, SEEK_SET) == -1)
119 err(1, "lseek error");
120
121 /* write a dummy byte at the last location */
122 if (write(fdout, "", 1) != 1)
123 err(1, "write error");
124
125 if ((src = mmap(0, statbuf.st_size, PROT_READ, MAP_SHARED, fdin, 0)) ==
126 (caddr_t) - 1)
127 err(1, "mmap error for input");
128
129 if ((dst = mmap(0, statbuf.st_size, PROT_READ | PROT_WRITE,
130 MAP_SHARED, fdout, 0)) == (caddr_t) - 1)
131 err(1, "mmap error for output");
132
133 memcpy(dst, src, statbuf.st_size);
134
135 if (munmap(src, statbuf.st_size) == -1)
136 err(1, "munmap");
137 close(fdin);
138
139 if (munmap(dst, statbuf.st_size) == -1)
140 err(1, "munmap");
141 close(fdout);
142
143 if (unlink(file) == -1)
144 err(3, "unlink(%s)", file);
145 }
146
147 return (0);
148 }
149