include/disktab.h

   1 /*
   2  * Copyright (c) 1983, 1993
   3  *      The Regents of the University of California.  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  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#)disktab.h        8.1 (Berkeley) 6/2/93
  30  * $DragonFly: src/include/disktab.h,v 1.4 2007/06/18 05:13:33 dillon Exp $
  31  */
  32
  33 #ifndef _DISKTAB_H_
  34 #define _DISKTAB_H_
  35
  36 #ifndef _MACHINE_TYPES_H_
  37 #include <machine/types.h>
  38 #endif
  39
  40 /*
  41  * Disk description table, see disktab(5)
  42  */
  43 #ifndef _PATH_DISKTAB
  44 #define _PATH_DISKTAB   "/etc/disktab"
  45 #endif
  46
  47 #define MAXDTPARTITIONS         16
  48
  49 struct  disktab {
  50         char    d_typename[16];         /* drive type (string) */
  51         int     d_typeid;               /* drive type (id) */
  52
  53         /*
  54          * disk_info mandatory fields (not necessarily mandatory for disktab).
  55          * If d_media_blksize and one of d_media_size or d_media_blocks
  56          * is set, the remainining d_media_size/d_media_blocks field will
  57          * be constructed by getdisktabbyname().
  58          */
  59         __uint64_t d_media_size;
  60         __uint64_t d_media_blocks;
  61         int     d_media_blksize;
  62         int     d_dsflags;
  63
  64         /*
  65          * disk_info optional fields.
  66          */
  67         unsigned int    d_nheads;       /* (used to be d_ntracks) */
  68         unsigned int    d_secpertrack;  /* (used to be d_nsectors) */
  69         unsigned int    d_secpercyl;
  70         unsigned int    d_ncylinders;
  71
  72         int     d_rpm;                  /* revolutions/minute */
  73         int     d_badsectforw;          /* supports DEC bad144 std */
  74         int     d_sectoffset;           /* use sect rather than cyl offsets */
  75         int     d_npartitions;          /* number of partitions */
  76         int     d_interleave;
  77         int     d_trackskew;
  78         int     d_cylskew;
  79         int     d_headswitch;
  80         int     d_trkseek;
  81
  82         unsigned int    d_bbsize;       /* size of boot area */
  83         unsigned int    d_sbsize;       /* max size of fs superblock */
  84
  85         /*
  86          * The partition table is variable length but does not necessarily
  87          * represent the maximum possible number of partitions for any
  88          * particular type of disklabel.
  89          */
  90         struct  dt_partition {
  91                 __uint64_t p_offset;    /* offset, in sectors */
  92                 __uint64_t p_size;      /* #sectors in partition */
  93                 int       p_fstype;
  94                 int       p_fsize;      /* fragment size */
  95                 int       p_frag;       /* bsize = fsize * frag */
  96                 char      p_fstypestr[32];
  97         } d_partitions[MAXDTPARTITIONS];
  98 };
  99
 100 #ifndef _KERNEL
 101 __BEGIN_DECLS
 102 struct disklabel32;
 103 struct disktab *getdisktabbyname (const char *);
 104 struct disklabel32 *getdiskbyname (const char *);
 105 __END_DECLS
 106 #endif
 107
 108 #endif /* !_DISKTAB_H_ */