The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/sun_disklabel.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-3-Clause
    3  *
    4  * Copyright (c) 1992, 1993
    5  *      The Regents of the University of California.  All rights reserved.
    6  * Copyright (c) 2004,2005 Joerg Wunsch
    7  *
    8  * This software was developed by the Computer Systems Engineering group
    9  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
   10  * contributed to Berkeley.
   11  *
   12  * Redistribution and use in source and binary forms, with or without
   13  * modification, are permitted provided that the following conditions
   14  * are met:
   15  * 1. Redistributions of source code must retain the above copyright
   16  *    notice, this list of conditions and the following disclaimer.
   17  * 2. Redistributions in binary form must reproduce the above copyright
   18  *    notice, this list of conditions and the following disclaimer in the
   19  *    documentation and/or other materials provided with the distribution.
   20  * 3. Neither the name of the University nor the names of its contributors
   21  *    may be used to endorse or promote products derived from this software
   22  *    without specific prior written permission.
   23  *
   24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   34  * SUCH DAMAGE.
   35  *
   36  *      @(#)sun_disklabel.h     8.1 (Berkeley) 6/11/93
   37  *      $NetBSD: disklabel.h,v 1.2 1998/08/22 14:55:28 mrg Exp $
   38  *
   39  * $FreeBSD: stable/12/sys/sys/sun_disklabel.h 326023 2017-11-20 19:43:44Z pfg $ 
   40  */
   41 
   42 #ifndef _SYS_SUN_DISKLABEL_H_
   43 #define _SYS_SUN_DISKLABEL_H_
   44 
   45 /*
   46  * SunOS/Solaris disk label layout (partial).
   47  * 
   48  * Suns disk label format contains a lot of historical baggage which we 
   49  * ignore entirely.  The structure below contains the relevant bits and the
   50  * _enc/_dec functions encode/decode only these fields.
   51  */
   52 
   53 #define SUN_DKMAGIC     55998
   54 #define SUN_NPART       8
   55 #define SUN_RAWPART     2
   56 #define SUN_SIZE        512
   57 #define SUN_VTOC_VERSION 1
   58 #define SUN_VTOC_SANE   0x600DDEEE /* SVR4-compatible VTOC is "sane". */
   59 #define SUN_VOLNAME_LEN 8
   60 /*
   61  * XXX: I am actually not sure if this should be "16 sectors" or "8192 bytes".
   62  * XXX: Considering that Sun went to the effort of getting 512 byte compatible
   63  * XXX: CDROM drives produced my guess is that Sun computers stand little or
   64  * XXX: even no chance of running, much less booting on !=512 byte media.
   65  * XXX: Define this is in terms of bytes since that is easier for us.
   66  */
   67 #define SUN_BOOTSIZE    8192
   68 
   69 /* partition info */
   70 struct sun_dkpart {
   71         u_int32_t       sdkp_cyloffset;         /* starting cylinder */
   72         u_int32_t       sdkp_nsectors;          /* number of sectors */
   73 };
   74 
   75 struct sun_vtoc_info {
   76         u_int16_t       svtoc_tag;              /* partition tag */
   77         u_int16_t       svtoc_flag;             /* partition flags */
   78 };
   79 
   80 /* known partition tag values */
   81 #define VTOC_UNASSIGNED 0x00
   82 #define VTOC_BOOT       0x01
   83 #define VTOC_ROOT       0x02
   84 #define VTOC_SWAP       0x03
   85 #define VTOC_USR        0x04
   86 #define VTOC_BACKUP     0x05    /* "c" partition, covers entire disk */
   87 #define VTOC_STAND      0x06
   88 #define VTOC_VAR        0x07
   89 #define VTOC_HOME       0x08
   90 #define VTOC_ALTSCTR    0x09    /* alternate sector partition */
   91 #define VTOC_CACHE      0x0a    /* Solaris cachefs partition */
   92 #define VTOC_VXVM_PUB   0x0e    /* VxVM public region */
   93 #define VTOC_VXVM_PRIV  0x0f    /* VxVM private region */
   94 
   95 /* VTOC partition flags */
   96 #define VTOC_UNMNT      0x01    /* unmountable partition */
   97 #define VTOC_RONLY      0x10    /* partition is read/only */
   98 
   99 struct sun_disklabel {
  100         char            sl_text[128];
  101 
  102         /* SVR4 VTOC information */
  103         u_int32_t       sl_vtoc_vers;           /* == SUN_VTOC_VERSION */
  104         char            sl_vtoc_volname[SUN_VOLNAME_LEN];
  105         u_int16_t       sl_vtoc_nparts;         /* == SUN_NPART */
  106         struct sun_vtoc_info sl_vtoc_map[SUN_NPART]; /* partition tag/flag */
  107         u_int32_t       sl_vtoc_sane;           /* == SUN_VTOC_SANE */
  108 
  109         /* Sun label information */
  110         u_int16_t       sl_rpm;                 /* rotational speed */
  111         u_int16_t       sl_pcylinders;          /* number of physical cyls */
  112         u_int16_t       sl_sparespercyl;        /* spare sectors per cylinder */
  113         u_int16_t       sl_interleave;          /* interleave factor */
  114         u_int16_t       sl_ncylinders;          /* data cylinders */
  115         u_int16_t       sl_acylinders;          /* alternate cylinders */
  116         u_int16_t       sl_ntracks;             /* tracks per cylinder */
  117         u_int16_t       sl_nsectors;            /* sectors per track */
  118         struct sun_dkpart sl_part[SUN_NPART];   /* partition layout */
  119         u_int16_t       sl_magic;               /* == SUN_DKMAGIC */
  120 };
  121 
  122 int sunlabel_dec(void const *pp, struct sun_disklabel *sl);
  123 void sunlabel_enc(void *pp, struct sun_disklabel *sl);
  124 
  125 #endif /* _SYS_SUN_DISKLABEL_H_ */

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