10Sstevel@tonic-gate /*
20Sstevel@tonic-gate * CDDL HEADER START
30Sstevel@tonic-gate *
40Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*6812Sraf * Common Development and Distribution License (the "License").
6*6812Sraf * You may not use this file except in compliance with the License.
70Sstevel@tonic-gate *
80Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
90Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
100Sstevel@tonic-gate * See the License for the specific language governing permissions
110Sstevel@tonic-gate * and limitations under the License.
120Sstevel@tonic-gate *
130Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
140Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
150Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
160Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
170Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
180Sstevel@tonic-gate *
190Sstevel@tonic-gate * CDDL HEADER END
200Sstevel@tonic-gate */
211219Sraf
220Sstevel@tonic-gate /*
23*6812Sraf * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
240Sstevel@tonic-gate * Use is subject to license terms.
250Sstevel@tonic-gate */
260Sstevel@tonic-gate
270Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
280Sstevel@tonic-gate
29*6812Sraf #include "lint.h"
300Sstevel@tonic-gate #include <sys/types.h>
310Sstevel@tonic-gate #include <unistd.h>
320Sstevel@tonic-gate #include <sys/filio.h>
330Sstevel@tonic-gate
340Sstevel@tonic-gate /*
350Sstevel@tonic-gate * directio() allows an application to provide advise to the
360Sstevel@tonic-gate * filesystem to optimize read and write performance.
370Sstevel@tonic-gate */
380Sstevel@tonic-gate
390Sstevel@tonic-gate int
directio(int fildes,int advice)400Sstevel@tonic-gate directio(int fildes, int advice)
410Sstevel@tonic-gate {
420Sstevel@tonic-gate return (ioctl(fildes, _FIODIRECTIO, advice));
430Sstevel@tonic-gate }
44