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 /* Test lockf(3) with overlapping ranges */
29
30 /* Provoked:
31 lock order reversal:
32 1st 0xc50057a0 vnode interlock (vnode interlock) @ kern/kern_lockf.c:190
33 2nd 0xc14710e8 system map (system map) @ vm/vm_kern.c:296
34 */
35
36 #include <sys/types.h>
37
38 #include <err.h>
39 #include <errno.h>
40 #include <fcntl.h>
41 #include <stdio.h>
42 #include <stdlib.h>
43 #include <strings.h>
44 #include <unistd.h>
45
46 #include "stress.h"
47
48 static char file[128];
49 static int fd;
50 static int freespace;
51
52 int
setup(int nb)53 setup(int nb)
54 {
55 int64_t bl;
56 int64_t in;
57 int64_t reserve_bl;
58 int64_t reserve_in;
59 int i;
60 char buf[1024];
61
62 if (nb == 0) {
63 getdf(&bl, &in);
64
65 /* Resource requirements: */
66 reserve_in = 1 * op->incarnations;
67 reserve_bl = 1081344 * op->incarnations;
68 freespace = (reserve_bl <= bl && reserve_in <= in);
69 if (!freespace)
70 reserve_bl = reserve_in = 0;
71
72 if (op->verbose > 1)
73 printf("lockf2(incarnations=%d). Free(%jdk, %jd), reserve(%jdk, %jd)\n",
74 op->incarnations, bl/1024, in, reserve_bl/1024, reserve_in);
75 reservedf(reserve_bl, reserve_in);
76 putval(freespace);
77 } else {
78 freespace = getval();
79 }
80 if (!freespace)
81 exit (0);
82
83 sprintf(file, "lockf.%d", getpid());
84 if ((fd = open(file,O_CREAT | O_TRUNC | O_RDWR, 0600)) == -1)
85 err(1, "creat(%s)", file);
86 bzero(buf, sizeof(buf));
87 for (i = 0; i < 1024; i++)
88 if (write(fd, &buf, sizeof(buf)) != sizeof(buf))
89 err(1, "write");
90 close(fd);
91 return (0);
92 }
93
94 void
cleanup(void)95 cleanup(void)
96 {
97 unlink(file);
98 }
99
100 int
test(void)101 test(void)
102 {
103 off_t pos;
104 off_t size;
105 int i, r;
106
107 if ((fd = open(file, O_RDWR, 0600)) == -1)
108 err(1, "open(%s)", file);
109
110 for (i = 0; i < 1024 && done_testing == 0; i++) {
111 pos = random_int(0, 1024 * 1024 - 1);
112 if (lseek(fd, pos, SEEK_SET) == -1)
113 err(1, "lseek");
114 size = random_int(1, 1024 * 1024 - pos);
115 if (size > 64)
116 size = 64;
117 do {
118 r = lockf(fd, F_LOCK, size);
119 } while (r == -1 && errno == EINTR);
120 if (r == -1)
121 err(1, "lockf(%s, F_LOCK)", file);
122 size = random_int(1, size);
123 if (lockf(fd, F_ULOCK, size) == -1)
124 err(1, "lockf(%s, F_ULOCK)", file);
125
126 }
127 close(fd);
128
129 return (0);
130 }
131