1*d583b39bSJohn Wren Kennedy /*
2*d583b39bSJohn Wren Kennedy  * CDDL HEADER START
3*d583b39bSJohn Wren Kennedy  *
4*d583b39bSJohn Wren Kennedy  * The contents of this file are subject to the terms of the
5*d583b39bSJohn Wren Kennedy  * Common Development and Distribution License (the "License").
6*d583b39bSJohn Wren Kennedy  * You may not use this file except in compliance with the License.
7*d583b39bSJohn Wren Kennedy  *
8*d583b39bSJohn Wren Kennedy  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9*d583b39bSJohn Wren Kennedy  * or http://www.opensolaris.org/os/licensing.
10*d583b39bSJohn Wren Kennedy  * See the License for the specific language governing permissions
11*d583b39bSJohn Wren Kennedy  * and limitations under the License.
12*d583b39bSJohn Wren Kennedy  *
13*d583b39bSJohn Wren Kennedy  * When distributing Covered Code, include this CDDL HEADER in each
14*d583b39bSJohn Wren Kennedy  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15*d583b39bSJohn Wren Kennedy  * If applicable, add the following below this CDDL HEADER, with the
16*d583b39bSJohn Wren Kennedy  * fields enclosed by brackets "[]" replaced with your own identifying
17*d583b39bSJohn Wren Kennedy  * information: Portions Copyright [yyyy] [name of copyright owner]
18*d583b39bSJohn Wren Kennedy  *
19*d583b39bSJohn Wren Kennedy  * CDDL HEADER END
20*d583b39bSJohn Wren Kennedy  */
21*d583b39bSJohn Wren Kennedy 
22*d583b39bSJohn Wren Kennedy /*
23*d583b39bSJohn Wren Kennedy  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
24*d583b39bSJohn Wren Kennedy  * Use is subject to license terms.
25*d583b39bSJohn Wren Kennedy  */
26*d583b39bSJohn Wren Kennedy 
27*d583b39bSJohn Wren Kennedy /*
28*d583b39bSJohn Wren Kennedy  * Copyright (c) 2012 by Delphix. All rights reserved.
29*d583b39bSJohn Wren Kennedy  */
30*d583b39bSJohn Wren Kennedy 
31*d583b39bSJohn Wren Kennedy /*
32*d583b39bSJohn Wren Kennedy  * --------------------------------------------------------------------
33*d583b39bSJohn Wren Kennedy  * The purpose of this test is to see if the bug reported (#4723351) for
34*d583b39bSJohn Wren Kennedy  * UFS exists when using a ZFS file system.
35*d583b39bSJohn Wren Kennedy  * --------------------------------------------------------------------
36*d583b39bSJohn Wren Kennedy  *
37*d583b39bSJohn Wren Kennedy  */
38*d583b39bSJohn Wren Kennedy #define	_REENTRANT 1
39*d583b39bSJohn Wren Kennedy #include <stdio.h>
40*d583b39bSJohn Wren Kennedy #include <fcntl.h>
41*d583b39bSJohn Wren Kennedy #include <pthread.h>
42*d583b39bSJohn Wren Kennedy #include <thread.h>
43*d583b39bSJohn Wren Kennedy #include <errno.h>
44*d583b39bSJohn Wren Kennedy #include <sys/types.h>
45*d583b39bSJohn Wren Kennedy #include <sys/stat.h>
46*d583b39bSJohn Wren Kennedy #include <stdlib.h>
47*d583b39bSJohn Wren Kennedy #include <unistd.h>
48*d583b39bSJohn Wren Kennedy #include <strings.h>
49*d583b39bSJohn Wren Kennedy 
50*d583b39bSJohn Wren Kennedy static const int TRUE = 1;
51*d583b39bSJohn Wren Kennedy static char *filebase;
52*d583b39bSJohn Wren Kennedy 
53*d583b39bSJohn Wren Kennedy static int
pickidx()54*d583b39bSJohn Wren Kennedy pickidx()
55*d583b39bSJohn Wren Kennedy {
56*d583b39bSJohn Wren Kennedy 	return (random() % 1000);
57*d583b39bSJohn Wren Kennedy }
58*d583b39bSJohn Wren Kennedy 
59*d583b39bSJohn Wren Kennedy /* ARGSUSED */
60*d583b39bSJohn Wren Kennedy static void *
mover(void * a)61*d583b39bSJohn Wren Kennedy mover(void *a)
62*d583b39bSJohn Wren Kennedy {
63*d583b39bSJohn Wren Kennedy 	char buf[256];
64*d583b39bSJohn Wren Kennedy 	int idx, len, ret;
65*d583b39bSJohn Wren Kennedy 
66*d583b39bSJohn Wren Kennedy 	len = strlen(filebase) + 5;
67*d583b39bSJohn Wren Kennedy 
68*d583b39bSJohn Wren Kennedy 	while (TRUE) {
69*d583b39bSJohn Wren Kennedy 		idx = pickidx();
70*d583b39bSJohn Wren Kennedy 		(void) snprintf(buf, len, "%s.%03d", filebase, idx);
71*d583b39bSJohn Wren Kennedy 		ret = rename(filebase, buf);
72*d583b39bSJohn Wren Kennedy 		if (ret < 0 && errno != ENOENT)
73*d583b39bSJohn Wren Kennedy 			(void) perror("renaming file");
74*d583b39bSJohn Wren Kennedy 	}
75*d583b39bSJohn Wren Kennedy 
76*d583b39bSJohn Wren Kennedy 	return (NULL);
77*d583b39bSJohn Wren Kennedy }
78*d583b39bSJohn Wren Kennedy 
79*d583b39bSJohn Wren Kennedy /* ARGSUSED */
80*d583b39bSJohn Wren Kennedy static void *
cleaner(void * a)81*d583b39bSJohn Wren Kennedy cleaner(void *a)
82*d583b39bSJohn Wren Kennedy {
83*d583b39bSJohn Wren Kennedy 	char buf[256];
84*d583b39bSJohn Wren Kennedy 	int idx, len, ret;
85*d583b39bSJohn Wren Kennedy 
86*d583b39bSJohn Wren Kennedy 	len = strlen(filebase) + 5;
87*d583b39bSJohn Wren Kennedy 
88*d583b39bSJohn Wren Kennedy 	while (TRUE) {
89*d583b39bSJohn Wren Kennedy 		idx = pickidx();
90*d583b39bSJohn Wren Kennedy 		(void) snprintf(buf, len, "%s.%03d", filebase, idx);
91*d583b39bSJohn Wren Kennedy 		ret = remove(buf);
92*d583b39bSJohn Wren Kennedy 		if (ret < 0 && errno != ENOENT)
93*d583b39bSJohn Wren Kennedy 			(void) perror("removing file");
94*d583b39bSJohn Wren Kennedy 	}
95*d583b39bSJohn Wren Kennedy 
96*d583b39bSJohn Wren Kennedy 	return (NULL);
97*d583b39bSJohn Wren Kennedy }
98*d583b39bSJohn Wren Kennedy 
99*d583b39bSJohn Wren Kennedy static void *
writer(void * a)100*d583b39bSJohn Wren Kennedy writer(void *a)
101*d583b39bSJohn Wren Kennedy {
102*d583b39bSJohn Wren Kennedy 	int *fd = (int *)a;
103*d583b39bSJohn Wren Kennedy 
104*d583b39bSJohn Wren Kennedy 	while (TRUE) {
105*d583b39bSJohn Wren Kennedy 		(void) close (*fd);
106*d583b39bSJohn Wren Kennedy 		*fd = open(filebase, O_APPEND | O_RDWR | O_CREAT, 0644);
107*d583b39bSJohn Wren Kennedy 		if (*fd < 0)
108*d583b39bSJohn Wren Kennedy 			perror("refreshing file");
109*d583b39bSJohn Wren Kennedy 		(void) write(*fd, "test\n", 5);
110*d583b39bSJohn Wren Kennedy 	}
111*d583b39bSJohn Wren Kennedy 
112*d583b39bSJohn Wren Kennedy 	return (NULL);
113*d583b39bSJohn Wren Kennedy }
114*d583b39bSJohn Wren Kennedy 
115*d583b39bSJohn Wren Kennedy int
main(int argc,char ** argv)116*d583b39bSJohn Wren Kennedy main(int argc, char **argv)
117*d583b39bSJohn Wren Kennedy {
118*d583b39bSJohn Wren Kennedy 	int fd;
119*d583b39bSJohn Wren Kennedy 	pthread_t tid;
120*d583b39bSJohn Wren Kennedy 
121*d583b39bSJohn Wren Kennedy 	if (argc == 1) {
122*d583b39bSJohn Wren Kennedy 		(void) printf("Usage: %s <filebase>\n", argv[0]);
123*d583b39bSJohn Wren Kennedy 		exit(-1);
124*d583b39bSJohn Wren Kennedy 	}
125*d583b39bSJohn Wren Kennedy 
126*d583b39bSJohn Wren Kennedy 	filebase = argv[1];
127*d583b39bSJohn Wren Kennedy 	fd = open(filebase, O_APPEND | O_RDWR | O_CREAT, 0644);
128*d583b39bSJohn Wren Kennedy 	if (fd < 0) {
129*d583b39bSJohn Wren Kennedy 		perror("creating test file");
130*d583b39bSJohn Wren Kennedy 		exit(-1);
131*d583b39bSJohn Wren Kennedy 	}
132*d583b39bSJohn Wren Kennedy 
133*d583b39bSJohn Wren Kennedy 	(void) thr_setconcurrency(4);	/* 3 threads + main */
134*d583b39bSJohn Wren Kennedy 	(void) pthread_create(&tid, NULL, mover, NULL);
135*d583b39bSJohn Wren Kennedy 	(void) pthread_create(&tid, NULL, cleaner, NULL);
136*d583b39bSJohn Wren Kennedy 	(void) pthread_create(&tid, NULL, writer, (void *) &fd);
137*d583b39bSJohn Wren Kennedy 
138*d583b39bSJohn Wren Kennedy 	while (TRUE) {
139*d583b39bSJohn Wren Kennedy 		int ret;
140*d583b39bSJohn Wren Kennedy 		struct stat st;
141*d583b39bSJohn Wren Kennedy 
142*d583b39bSJohn Wren Kennedy 		ret = stat(filebase, &st);
143*d583b39bSJohn Wren Kennedy 		if (ret == 0 && (st.st_nlink > 2 || st.st_nlink < 1)) {
144*d583b39bSJohn Wren Kennedy 			(void) printf("st.st_nlink = %d, exiting\n", \
145*d583b39bSJohn Wren Kennedy 			    (int)st.st_nlink);
146*d583b39bSJohn Wren Kennedy 			exit(0);
147*d583b39bSJohn Wren Kennedy 		}
148*d583b39bSJohn Wren Kennedy 		(void) sleep(1);
149*d583b39bSJohn Wren Kennedy 	}
150*d583b39bSJohn Wren Kennedy 
151*d583b39bSJohn Wren Kennedy 	return (0);
152*d583b39bSJohn Wren Kennedy }
153