disklabel.h revision 1.3
1/* $OpenBSD: disklabel.h,v 1.3 2006/06/26 23:11:31 krw Exp $ */ 2/* $NetBSD: disklabel.h,v 1.3 1996/03/09 20:52:54 ghudson Exp $ */ 3 4/* 5 * Copyright (c) 1994 Christopher G. Demetriou 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Christopher G. Demetriou. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34#ifndef _MACHINE_DISKLABEL_H_ 35#define _MACHINE_DISKLABEL_H_ 36 37#define LABELSECTOR 1 /* sector containing label */ 38#define LABELOFFSET 0 /* offset of label in sector */ 39#define MAXPARTITIONS 16 /* number of partitions */ 40#define RAW_PART 2 /* raw partition: ie. rsd0c */ 41 42/* DOS partition table -- located in boot block */ 43#define DOSBBSECTOR 0 /* DOS boot block relative sector # */ 44#define DOSPARTOFF 446 45#define DOSDISKOFF 444 46#define NDOSPART 4 47#define DOSACTIVE 0x80 /* active partition */ 48 49struct dos_partition { 50 u_int8_t dp_flag; /* bootstrap flags */ 51 u_int8_t dp_shd; /* starting head */ 52 u_int8_t dp_ssect; /* starting sector */ 53 u_int8_t dp_scyl; /* starting cylinder */ 54 u_int8_t dp_typ; /* partition type (see below) */ 55 u_int8_t dp_ehd; /* end head */ 56 u_int8_t dp_esect; /* end sector */ 57 u_int8_t dp_ecyl; /* end cylinder */ 58 u_int32_t dp_start; /* absolute starting sector number */ 59 u_int32_t dp_size; /* partition size in sectors */ 60}; 61 62/* Known DOS partition types. */ 63#define DOSPTYP_UNUSED 0x00 /* Unused partition */ 64#define DOSPTYP_FAT12 0x01 /* 12-bit FAT */ 65#define DOSPTYP_FAT16S 0x04 /* 16-bit FAT, less than 32M */ 66#define DOSPTYP_EXTEND 0x05 /* Extended; contains sub-partitions */ 67#define DOSPTYP_FAT16B 0x06 /* 16-bit FAT, more than 32M */ 68#define DOSPTYP_FAT32 0x0b /* 32-bit FAT */ 69#define DOSPTYP_FAT32L 0x0c /* 32-bit FAT, LBA-mapped */ 70#define DOSPTYP_FAT16L 0x0e /* 16-bit FAT, LBA-mapped */ 71#define DOSPTYP_EXTENDL 0x0f /* Extended, LBA-mapped; contains sub-partitions */ 72#define DOSPTYP_ONTRACK 0x54 73#define DOSPTYP_LINUX 0x83 /* That other thing */ 74#define DOSPTYP_FREEBSD 0xa5 /* FreeBSD partition type */ 75#define DOSPTYP_OPENBSD 0xa6 /* OpenBSD partition type */ 76#define DOSPTYP_NETBSD 0xa9 /* NetBSD partition type */ 77 78struct dos_mbr { 79 u_int8_t dmbr_boot[DOSPARTOFF]; 80 struct dos_partition dmbr_parts[NDOSPART]; 81 u_int16_t dmbr_sign; 82} __packed; 83 84#define DOSMBR_SIGNATURE (0xaa55) 85#define DOSMBR_SIGNATURE_OFF (0x1fe) 86 87#include <sys/dkbad.h> 88struct cpu_disklabel { 89 struct dos_partition dosparts[NDOSPART]; 90 struct dkbad bad; 91}; 92 93#define DKBAD(x) ((x)->bad) 94 95/* Isolate the relevant bits to get sector and cylinder. */ 96#define DPSECT(s) ((s) & 0x3f) 97#define DPCYL(c, s) ((c) + (((s) & 0xc0) << 2)) 98 99static __inline u_int32_t get_le(void *); 100 101static __inline u_int32_t 102get_le(void *p) 103{ 104 u_int8_t *_p = (u_int8_t *)p; 105 u_int32_t x; 106 x = _p[0]; 107 x |= _p[1] << 8; 108 x |= _p[2] << 16; 109 x |= _p[3] << 24; 110 return x; 111} 112 113#endif /* _MACHINE_DISKLABEL_H_ */ 114