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/disk/vtoc.h

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    1 /*-
    2  * Copyright (c) 2008 Marcel Moolenaar
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  *
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   25  *
   26  * $FreeBSD$
   27  */
   28 
   29 #ifndef _SYS_DISK_VTOC_H_
   30 #define _SYS_DISK_VTOC_H_
   31 
   32 #include <sys/types.h>
   33 
   34 #define VTOC_TAG_UNASSIGNED     0x00
   35 #define VTOC_TAG_BOOT           0x01
   36 #define VTOC_TAG_ROOT           0x02
   37 #define VTOC_TAG_SWAP           0x03
   38 #define VTOC_TAG_USR            0x04
   39 #define VTOC_TAG_BACKUP         0x05    /* "c" partition */
   40 #define VTOC_TAG_STAND          0x06
   41 #define VTOC_TAG_VAR            0x07
   42 #define VTOC_TAG_HOME           0x08
   43 #define VTOC_TAG_ALTSCTR        0x09    /* alternate sector partition */
   44 #define VTOC_TAG_CACHE          0x0a    /* Solaris cachefs partition */
   45 #define VTOC_TAG_VXVM_PUB       0x0e    /* VxVM public region */
   46 #define VTOC_TAG_VXVM_PRIV      0x0f    /* VxVM private region */
   47 
   48 /* NetBSD/mips defines this */
   49 #define VTOC_TAG_NETBSD_FFS     0xff
   50 
   51 /* FreeBSD tags: the high byte equals ELFOSABI_FREEBSD */
   52 #define VTOC_TAG_FREEBSD_SWAP   0x0901
   53 #define VTOC_TAG_FREEBSD_UFS    0x0902
   54 #define VTOC_TAG_FREEBSD_VINUM  0x0903
   55 #define VTOC_TAG_FREEBSD_ZFS    0x0904
   56 #define VTOC_TAG_FREEBSD_NANDFS 0x0905
   57 
   58 #define VTOC_FLAG_UNMNT         0x01    /* unmountable partition */
   59 #define VTOC_FLAG_RDONLY        0x10    /* partition is read/only */
   60 
   61 #define VTOC_ASCII_LEN  128
   62 #define VTOC_BOOTSIZE   8192            /* 16 sectors */
   63 #define VTOC_MAGIC      0xdabe
   64 #define VTOC_RAW_PART   2
   65 #define VTOC_SANITY     0x600ddeee
   66 #define VTOC_VERSION    1
   67 #define VTOC_VOLUME_LEN 8
   68 
   69 #define VTOC8_NPARTS    8
   70 
   71 struct vtoc8 {
   72         char            ascii[VTOC_ASCII_LEN];
   73         uint32_t        version;
   74         char            volume[VTOC_VOLUME_LEN];
   75         uint16_t        nparts;
   76         struct {
   77                 uint16_t        tag;
   78                 uint16_t        flag;
   79         } part[VTOC8_NPARTS];
   80         uint16_t        __alignment;
   81         uint32_t        bootinfo[3];
   82         uint32_t        sanity;
   83         uint32_t        reserved[10];
   84         uint32_t        timestamp[VTOC8_NPARTS];
   85         uint16_t        wskip;
   86         uint16_t        rskip;
   87         char            padding[152];
   88         uint16_t        rpm;
   89         uint16_t        physcyls;
   90         uint16_t        sparesecs;
   91         uint16_t        spare1[2];
   92         uint16_t        interleave;
   93         uint16_t        ncyls;
   94         uint16_t        altcyls;
   95         uint16_t        nheads;
   96         uint16_t        nsecs;
   97         uint16_t        spare2[2];
   98         struct {
   99                 uint32_t        cyl;
  100                 uint32_t        nblks;
  101         } map[VTOC8_NPARTS];
  102         uint16_t        magic;
  103         uint16_t        cksum;
  104 };
  105 
  106 #ifdef CTASSERT
  107 CTASSERT(sizeof(struct vtoc8) == 512);
  108 #endif
  109 
  110 #endif /* _SYS_DISK_VTOC_H_ */

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