d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy/*
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * CDDL HEADER START
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * The contents of this file are subject to the terms of the
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * Common Development and Distribution License (the "License").
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * You may not use this file except in compliance with the License.
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * or http://www.opensolaris.org/os/licensing.
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * See the License for the specific language governing permissions
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * and limitations under the License.
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * When distributing Covered Code, include this CDDL HEADER in each
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * If applicable, add the following below this CDDL HEADER, with the
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * fields enclosed by brackets "[]" replaced with your own identifying
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * information: Portions Copyright [yyyy] [name of copyright owner]
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * CDDL HEADER END
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy */
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy/*
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * Use is subject to license terms.
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy */
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy/*
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * Assertion:
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy *
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * A read operation and directory update operation performed
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * concurrently on the same directory can lead to deadlock
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy * on a UFS logging file system, but not on a ZFS file system.
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy */
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy#include <sys/types.h>
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy#include <sys/stat.h>
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy#include <errno.h>
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy#include <fcntl.h>
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy#include <string.h>
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy#include <stdio.h>
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy#include <stdlib.h>
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy#include <unistd.h>
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy#define TMP_DIR /tmp
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedystatic char dirpath[256];
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedyint
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedymain(int argc, char **argv)
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy{
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy char *cp1 = "";
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy int i = 0;
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy int ret = 0;
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy int testdd = 0;
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy pid_t pid;
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy static const int op_num = 5;
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy if (argc == 1) {
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy (void) printf("Usage: %s <mount point>\n", argv[0]);
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy exit(-1);
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy }
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy for (i = 0; i < 256; i++) {
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy dirpath[i] = 0;
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy }
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy cp1 = argv[1];
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy (void) strcpy(&dirpath[0], (const char *)cp1);
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy (void) strcat(&dirpath[strlen(dirpath)], "TMP_DIR");
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy ret = mkdir(dirpath, 0777);
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy if (ret != 0) {
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy if (errno != EEXIST) {
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy (void) printf("%s: mkdir(<%s>, 0777) failed: errno "
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy "(decimal)=%d\n", argv[0], dirpath, errno);
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy exit(-1);
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy }
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy }
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy testdd = open(dirpath, O_RDONLY|O_RSYNC|O_SYNC|O_DSYNC);
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy if (testdd < 0) {
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy (void) printf("%s: open(<%s>, O_RDONLY|O_RSYNC|O_SYNC|O_DSYNC)"
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy " failed: errno (decimal)=%d\n", argv[0], dirpath, errno);
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy exit(-1);
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy } else {
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy (void) close(testdd);
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy }
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy pid = fork();
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy if (pid > 0) {
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy int fd = open(dirpath, O_RDONLY|O_RSYNC|O_SYNC|O_DSYNC);
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy char buf[16];
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy int rdret;
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy int j = 0;
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy while (j < op_num) {
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy (void) sleep(1);
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy rdret = read(fd, buf, 16);
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy if (rdret == -1) {
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy (void) printf("readdir failed");
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy }
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy j++;
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy }
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy } else if (pid == 0) {
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy int fd = open(dirpath, O_RDONLY);
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy int chownret;
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy int k = 0;
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy while (k < op_num) {
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy (void) sleep(1);
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy chownret = fchown(fd, 0, 0);
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy if (chownret == -1) {
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy (void) printf("chown failed");
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy }
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy k++;
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy }
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy }
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy return (0);
d583b39bfb4e2571d3e41097c5c357ffe353ad45John Wren Kennedy}