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

     /*-
      * SPDX-License-Identifier: BSD-3-Clause
      *
      * Copyright (c) 1992, 1993
      *      The Regents of the University of California.  All rights reserved.
      * Copyright (c) 2004,2005 Joerg Wunsch
      *
      * This software was developed by the Computer Systems Engineering group
      * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
     * contributed to Berkeley.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)sun_disklabel.h     8.1 (Berkeley) 6/11/93
     *      $NetBSD: disklabel.h,v 1.2 1998/08/22 14:55:28 mrg Exp $
     *
     * $FreeBSD: releng/12.0/sys/sys/sun_disklabel.h 326023 2017-11-20 19:43:44Z pfg $ 
     */
    
    #ifndef _SYS_SUN_DISKLABEL_H_
    #define _SYS_SUN_DISKLABEL_H_
    
    /*
     * SunOS/Solaris disk label layout (partial).
     * 
     * Suns disk label format contains a lot of historical baggage which we 
     * ignore entirely.  The structure below contains the relevant bits and the
     * _enc/_dec functions encode/decode only these fields.
     */
    
    #define SUN_DKMAGIC     55998
    #define SUN_NPART       8
    #define SUN_RAWPART     2
    #define SUN_SIZE        512
    #define SUN_VTOC_VERSION 1
    #define SUN_VTOC_SANE   0x600DDEEE /* SVR4-compatible VTOC is "sane". */
    #define SUN_VOLNAME_LEN 8
    /*
     * XXX: I am actually not sure if this should be "16 sectors" or "8192 bytes".
     * XXX: Considering that Sun went to the effort of getting 512 byte compatible
     * XXX: CDROM drives produced my guess is that Sun computers stand little or
     * XXX: even no chance of running, much less booting on !=512 byte media.
     * XXX: Define this is in terms of bytes since that is easier for us.
     */
    #define SUN_BOOTSIZE    8192
    
    /* partition info */
    struct sun_dkpart {
            u_int32_t       sdkp_cyloffset;         /* starting cylinder */
            u_int32_t       sdkp_nsectors;          /* number of sectors */
    };
    
    struct sun_vtoc_info {
            u_int16_t       svtoc_tag;              /* partition tag */
            u_int16_t       svtoc_flag;             /* partition flags */
    };
    
    /* known partition tag values */
    #define VTOC_UNASSIGNED 0x00
    #define VTOC_BOOT       0x01
    #define VTOC_ROOT       0x02
    #define VTOC_SWAP       0x03
    #define VTOC_USR        0x04
    #define VTOC_BACKUP     0x05    /* "c" partition, covers entire disk */
    #define VTOC_STAND      0x06
    #define VTOC_VAR        0x07
    #define VTOC_HOME       0x08
    #define VTOC_ALTSCTR    0x09    /* alternate sector partition */
    #define VTOC_CACHE      0x0a    /* Solaris cachefs partition */
    #define VTOC_VXVM_PUB   0x0e    /* VxVM public region */
    #define VTOC_VXVM_PRIV  0x0f    /* VxVM private region */
    
    /* VTOC partition flags */
    #define VTOC_UNMNT      0x01    /* unmountable partition */
    #define VTOC_RONLY      0x10    /* partition is read/only */
    
    struct sun_disklabel {
           char            sl_text[128];
   
           /* SVR4 VTOC information */
           u_int32_t       sl_vtoc_vers;           /* == SUN_VTOC_VERSION */
           char            sl_vtoc_volname[SUN_VOLNAME_LEN];
           u_int16_t       sl_vtoc_nparts;         /* == SUN_NPART */
           struct sun_vtoc_info sl_vtoc_map[SUN_NPART]; /* partition tag/flag */
           u_int32_t       sl_vtoc_sane;           /* == SUN_VTOC_SANE */
   
           /* Sun label information */
           u_int16_t       sl_rpm;                 /* rotational speed */
           u_int16_t       sl_pcylinders;          /* number of physical cyls */
           u_int16_t       sl_sparespercyl;        /* spare sectors per cylinder */
           u_int16_t       sl_interleave;          /* interleave factor */
           u_int16_t       sl_ncylinders;          /* data cylinders */
           u_int16_t       sl_acylinders;          /* alternate cylinders */
           u_int16_t       sl_ntracks;             /* tracks per cylinder */
           u_int16_t       sl_nsectors;            /* sectors per track */
           struct sun_dkpart sl_part[SUN_NPART];   /* partition layout */
           u_int16_t       sl_magic;               /* == SUN_DKMAGIC */
   };
   
   int sunlabel_dec(void const *pp, struct sun_disklabel *sl);
   void sunlabel_enc(void *pp, struct sun_disklabel *sl);
   
   #endif /* _SYS_SUN_DISKLABEL_H_ */

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