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