FreeBSD/Linux Kernel Cross Reference
sys/sys/diskmbr.h
1 /*
2 * Copyright (c) 1987, 1988, 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. 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.
20 *
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.
32 *
33 * @(#)disklabel.h 8.2 (Berkeley) 7/10/94
34 * $FreeBSD: releng/5.0/sys/sys/diskmbr.h 108569 2003-01-02 20:16:17Z phk $
35 */
36
37 #ifndef _SYS_DISKMBR_H_
38 #define _SYS_DISKMBR_H_
39
40 #include <sys/ioccom.h>
41
42 #define DOSBBSECTOR 0 /* DOS boot block relative sector number */
43 #define DOSPARTOFF 446
44 #define NDOSPART 4
45 #define DOSPTYP_386BSD 0xa5 /* 386BSD partition type */
46 #define DOSPTYP_LINSWP 0x82 /* Linux swap partition */
47 #define DOSPTYP_LINUX 0x83 /* Linux partition */
48 #define DOSPTYP_EXT 5 /* DOS extended partition */
49 #define DOSPTYP_EXTLBA 15 /* DOS extended partition */
50
51 struct dos_partition {
52 unsigned char dp_flag; /* bootstrap flags */
53 unsigned char dp_shd; /* starting head */
54 unsigned char dp_ssect; /* starting sector */
55 unsigned char dp_scyl; /* starting cylinder */
56 unsigned char dp_typ; /* partition type */
57 unsigned char dp_ehd; /* end head */
58 unsigned char dp_esect; /* end sector */
59 unsigned char dp_ecyl; /* end cylinder */
60 u_int32_t dp_start; /* absolute starting sector number */
61 u_int32_t dp_size; /* partition size in sectors */
62 };
63 #ifdef CTASSERT
64 CTASSERT(sizeof (struct dos_partition) == 16);
65 #endif
66
67 #define DPSECT(s) ((s) & 0x3f) /* isolate relevant bits of sector */
68 #define DPCYL(c, s) ((c) + (((s) & 0xc0)<<2)) /* and those that are cylinder */
69
70 #define DIOCGMBR _IOR('M', 128, u_char[512])
71 #define DIOCSMBR _IOW('M', 129, u_char[512])
72
73
74 #endif /* !_SYS_DISKMBR_H_ */
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