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 2008 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27#pragma ident	"%Z%%M%	%I%	%E% SMI"
28
29#include "lint.h"
30#include <fcntl.h>
31#include <sys/types.h>
32#include <sys/stat.h>
33#include <errno.h>
34
35/*
36 * SUSv3 - file advisory information
37 *
38 * This function does nothing, but that's OK because the
39 * Posix specification doesn't require it to do anything
40 * other than return appropriate error numbers.
41 *
42 * In the future, a file system dependent fadvise() or fcntl()
43 * interface, similar to madvise(), should be developed to enable
44 * the kernel to optimize I/O operations based on the given advice.
45 */
46
47/* ARGSUSED1 */
48int
49posix_fadvise(int fd, off_t offset, off_t len, int advice)
50{
51	struct stat64 statb;
52
53	switch (advice) {
54	case POSIX_FADV_NORMAL:
55	case POSIX_FADV_RANDOM:
56	case POSIX_FADV_SEQUENTIAL:
57	case POSIX_FADV_WILLNEED:
58	case POSIX_FADV_DONTNEED:
59	case POSIX_FADV_NOREUSE:
60		break;
61	default:
62		return (EINVAL);
63	}
64	if (len < 0)
65		return (EINVAL);
66	if (fstat64(fd, &statb) != 0)
67		return (EBADF);
68	if (S_ISFIFO(statb.st_mode))
69		return (ESPIPE);
70	return (0);
71}
72
73#if !defined(_LP64)
74
75/* ARGSUSED1 */
76int
77posix_fadvise64(int fd, off64_t offset, off64_t len, int advice)
78{
79	struct stat64 statb;
80
81	switch (advice) {
82	case POSIX_FADV_NORMAL:
83	case POSIX_FADV_RANDOM:
84	case POSIX_FADV_SEQUENTIAL:
85	case POSIX_FADV_WILLNEED:
86	case POSIX_FADV_DONTNEED:
87	case POSIX_FADV_NOREUSE:
88		break;
89	default:
90		return (EINVAL);
91	}
92	if (len < 0)
93		return (EINVAL);
94	if (fstat64(fd, &statb) != 0)
95		return (EBADF);
96	if (S_ISFIFO(statb.st_mode))
97		return (ESPIPE);
98	return (0);
99}
100
101#endif
102