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, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright 2005 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 <sys/types.h>
30/*
31 * Need to include md_mddb.h for the MDDB_REV_MAJOR and MDDB_REV_MINOR
32 * definitions.  The other files included are required for md_mddb.h.
33 */
34#ifdef _KERNEL
35#include <sys/lvm/md_basic.h>
36#include <sys/lvm/mdvar.h>
37#else /* !_KERNEL */
38#include <meta.h>
39#endif /* _KERNEL */
40#include <sys/lvm/md_mddb.h>
41
42
43/*
44 * revchk()
45 * Checks the major and minor revision numbers for either an in-core or on-disk
46 * directory block or record block against the currently defined major and
47 * minor numbers(MDDB_REV_MAJOR and MDDB_REV_MINOR) to make sure that they are
48 * compatible with this version of SVM.  For example, earlier versions of SVM
49 * don't understand dummy masterblocks or deviceIDs in disksets.
50 */
51int
52revchk(
53	uint_t	my_rev,
54	uint_t	data
55)
56{
57	if ((MDDB_REV_MAJOR & my_rev) != (MDDB_REV_MAJOR & data))
58		return (1);
59	if ((MDDB_REV_MINOR & my_rev) < (MDDB_REV_MINOR & data))
60		return (1);
61	return (0);
62}
63