159 lines
3.2 KiB
C
159 lines
3.2 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or https://opensource.org/licenses/CDDL-1.0.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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/*
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* Copyright (c) 2012 by Delphix. All rights reserved.
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*/
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/*
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* --------------------------------------------------------------------
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* The purpose of this test is to see if the bug reported (#4723351) for
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* UFS exists when using a ZFS file system.
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* --------------------------------------------------------------------
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*
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*/
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#define _REENTRANT 1
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#include <stdio.h>
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#include <fcntl.h>
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#include <pthread.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <stdlib.h>
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#include <unistd.h>
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static char *filebase;
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static int
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pickidx(void)
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{
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return (random() % 1000);
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}
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static void *
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mover(void *a)
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{
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(void) a;
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char buf[256];
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int idx, len, ret;
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len = strlen(filebase) + 5;
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for (;;) {
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idx = pickidx();
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(void) snprintf(buf, len, "%s.%03d", filebase, idx);
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ret = rename(filebase, buf);
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if (ret < 0 && errno != ENOENT)
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(void) perror("renaming file");
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}
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return (NULL);
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}
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static void *
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cleaner(void *a)
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{
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(void) a;
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char buf[256];
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int idx, len, ret;
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len = strlen(filebase) + 5;
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for (;;) {
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idx = pickidx();
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(void) snprintf(buf, len, "%s.%03d", filebase, idx);
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ret = remove(buf);
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if (ret < 0 && errno != ENOENT)
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(void) perror("removing file");
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}
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return (NULL);
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}
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static void *
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writer(void *a)
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{
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int *fd = (int *)a;
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int ret;
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for (;;) {
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if (*fd != -1)
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(void) close (*fd);
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*fd = open(filebase, O_APPEND | O_RDWR | O_CREAT, 0644);
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if (*fd == -1) {
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perror("fail to open test file, refreshing it");
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continue;
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}
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ret = write(*fd, "test\n", 5);
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if (ret != 5)
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perror("writing file");
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}
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return (NULL);
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}
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int
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main(int argc, char **argv)
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{
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int fd;
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pthread_t tid;
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if (argc == 1) {
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(void) printf("Usage: %s <filebase>\n", argv[0]);
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exit(-1);
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}
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filebase = argv[1];
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fd = open(filebase, O_APPEND | O_RDWR | O_CREAT, 0644);
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if (fd < 0) {
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perror("creating test file");
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exit(-1);
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}
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(void) pthread_setconcurrency(4); /* 3 threads + main */
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(void) pthread_create(&tid, NULL, mover, NULL);
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(void) pthread_create(&tid, NULL, cleaner, NULL);
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(void) pthread_create(&tid, NULL, writer, (void *) &fd);
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for (;;) {
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int ret;
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struct stat st;
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ret = stat(filebase, &st);
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if (ret == 0 && (st.st_nlink > 2 || st.st_nlink < 1)) {
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(void) printf("st.st_nlink = %d, exiting\n", \
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(int)st.st_nlink);
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exit(0);
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}
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(void) sleep(1);
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}
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return (0);
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}
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