1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27
28 /*
29 * --------------------------------------------------------------------
30 * The purpose of this test is to see if the bug reported (#4723351) for
31 * UFS exists when using a ZFS file system.
32 * --------------------------------------------------------------------
33 *
34 */
35 #define _REENTRANT 1
36 #include <stdio.h>
37 #include <fcntl.h>
38 #include <pthread.h>
39 #include <errno.h>
40 #include <sys/types.h>
41 #include <sys/stat.h>
42 #include <stdlib.h>
43 #include <unistd.h>
44
45 static const int TRUE = 1;
46 static char *filebase;
47
48 static int
pickidx()49 pickidx()
50 {
51 return (random() % 1000);
52 }
53
54 /* ARGSUSED */
55 static void *
mover(void * a)56 mover(void *a)
57 {
58 char buf[256];
59 int idx, ret;
60
61 while (TRUE) {
62 idx = pickidx();
63 (void) sprintf(buf, "%s.%03d", filebase, idx);
64 ret = rename(filebase, buf);
65 if (ret < 0 && errno != ENOENT)
66 (void) perror("renaming file");
67 }
68
69 return (NULL);
70 }
71
72 /* ARGSUSED */
73 static void *
cleaner(void * a)74 cleaner(void *a)
75 {
76 char buf[256];
77 int idx, ret;
78
79 while (TRUE) {
80 idx = pickidx();
81 (void) sprintf(buf, "%s.%03d", filebase, idx);
82 ret = remove(buf);
83 if (ret < 0 && errno != ENOENT)
84 (void) perror("removing file");
85 }
86
87 return (NULL);
88 }
89
90 static void *
writer(void * a)91 writer(void *a)
92 {
93 int *fd = (int *)a;
94
95 while (TRUE) {
96 (void) close (*fd);
97 *fd = open(filebase, O_APPEND | O_RDWR | O_CREAT, 0644);
98 if (*fd < 0)
99 perror("refreshing file");
100 (void) write(*fd, "test\n", 5);
101 }
102
103 return (NULL);
104 }
105
106 int
main(int argc,char ** argv)107 main(int argc, char **argv)
108 {
109 int fd;
110 pthread_t tid;
111
112 if (argc == 1) {
113 (void) printf("Usage: %s <filebase>\n", argv[0]);
114 exit(-1);
115 }
116
117 filebase = argv[1];
118 fd = open(filebase, O_APPEND | O_RDWR | O_CREAT, 0644);
119 if (fd < 0) {
120 perror("creating test file");
121 exit(-1);
122 }
123
124 if (pthread_setconcurrency(4)) { /* 3 threads + main */
125 fprintf(stderr, "failed to set concurrency\n");
126 exit(-1);
127 }
128 (void) pthread_create(&tid, NULL, mover, NULL);
129 (void) pthread_create(&tid, NULL, cleaner, NULL);
130 (void) pthread_create(&tid, NULL, writer, (void *) &fd);
131
132 while (TRUE) {
133 int ret;
134 struct stat st;
135
136 ret = stat(filebase, &st);
137 if (ret == 0 && (st.st_nlink > 2 || st.st_nlink < 1)) {
138 (void) printf("st.st_nlink = %d, exiting\n", \
139 (int)st.st_nlink);
140 exit(0);
141 }
142 (void) sleep(1);
143 }
144
145 return (0);
146 }
147