include/sys/dktp/altsctr.h

   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 /* Copyright (c) 1990, 1991 UNIX System Laboratories, Inc. */
  28 /* Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990 AT&T */
  29 /* All Rights Reserved */
  30
  31 /*
  32  * (c) Copyright INTERACTIVE Systems Corporation 1986, 1988, 1990
  33  * All rights reserved.
  34  */
  35
  36 #ifndef _SYS_DKTP_ALTSCTR_H
  37 #define _SYS_DKTP_ALTSCTR_H
  38
  39 #ifdef  __cplusplus
  40 extern "C" {
  41 #endif
  42
  43 /*      alternate sector partition information table                    */
  44 struct  alts_parttbl {
  45         uint32_t        alts_sanity;    /* to validate correctness      */
  46         uint32_t        alts_version;   /* version number               */
  47         uint32_t        alts_map_base;  /* disk offset of alts_partmap  */
  48         uint32_t        alts_map_len;   /* byte length of alts_partmap  */
  49         uint32_t        alts_ent_base;  /* disk offset of alts_entry    */
  50         uint32_t        alts_ent_used;  /* number of alternate entries used */
  51         uint32_t        alts_ent_end;   /* disk offset of top of alts_entry */
  52         uint32_t        alts_resv_base; /* disk offset of alts_reserved */
  53         uint32_t        alts_pad[5];    /* reserved fields              */
  54 };
  55
  56 /*      alternate sector remap entry table                              */
  57 struct  alts_ent {
  58         uint32_t        bad_start;      /* starting bad sector number   */
  59         uint32_t        bad_end;        /* ending bad sector number     */
  60         uint32_t        good_start;     /* starting alternate sector to use */
  61 };
  62
  63 /*      size of alternate partition table structure                     */
  64 #define ALTS_PARTTBL_SIZE       sizeof (struct alts_parttbl)
  65 /*      size of alternate entry table structure                         */
  66 #define ALTS_ENT_SIZE   sizeof (struct alts_ent)
  67
  68 /*      definition for alternate sector partition sector map            */
  69 #define ALTS_GOOD       0       /* good alternate sectors               */
  70 #define ALTS_BAD        1       /* bad alternate sectors                */
  71
  72 /*      definition for alternate sector partition id                    */
  73 #define ALTS_SANITY     0xaabbccdd /* magic number to validate alts_part */
  74 #define ALTS_VERSION1   0x01    /* version of alts_parttbl              */
  75
  76 #define ALTS_ENT_EMPTY  -1      /* empty alternate entry                */
  77 #define ALTS_MAP_UP     1       /* search forward with increasing sect# */
  78 #define ALTS_MAP_DOWN   -1      /* search backward with decreasing sect# */
  79
  80 #ifdef  __cplusplus
  81 }
  82 #endif
  83
  84 #endif  /* _SYS_DKTP_ALTSCTR_H */