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 49 pickidx() 50 { 51 return (random() % 1000); 52 } 53 54 /* ARGSUSED */ 55 static void * 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 * 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 * 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 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