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 */ 51 int 52 revchk( 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