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 * $FreeBSD$ 35 * $DragonFly: src/sys/sys/diskmbr.h,v 1.4 2007/06/17 03:51:11 dillon Exp $ 36 */ 37 38 #ifndef _SYS_DISKMBR_H_ 39 #define _SYS_DISKMBR_H_ 40 41 #ifndef _SYS_TYPES_H_ 42 #include <sys/types.h> 43 #endif 44 #ifndef _SYS_IOCCOM_H_ 45 #include <sys/ioccom.h> 46 #endif 47 48 #define DOSBBSECTOR 0 /* DOS boot block relative sector number */ 49 #define DOSPARTOFF 446 50 #define DOSPARTSIZE 16 51 #define NDOSPART 4 52 #define NEXTDOSPART 32 53 #define DOSMAGICOFFSET 510 54 #define DOSMAGIC 0xAA55 55 56 #define DOSPTYP_386BSD 0xa5 /* 386BSD partition type */ 57 #define DOSPTYP_OPENBSD 0xa6 /* OpenBSD partition type */ 58 #define DOSPTYP_NETBSD 0xa9 /* NetBSD partition type */ 59 #define DOSPTYP_LINSWP 0x82 /* Linux swap partition */ 60 #define DOSPTYP_LINUX 0x83 /* Linux partition */ 61 #define DOSPTYP_PMBR 0xee /* GPT Protective MBR */ 62 #define DOSPTYP_GPT 0xef /* GPT Native EFI */ 63 #define DOSPTYP_EXT 5 /* DOS extended partition */ 64 #define DOSPTYP_EXTLBA 15 /* DOS extended partition */ 65 66 /* 67 * Note that sector numbers in a legacy MBR DOS partition start at 1 instead 68 * of 0, so the first sector of the disk would be cyl 0, head 0, sector 1 69 * and translate to block 0 in the actual disk I/O. 70 */ 71 struct dos_partition { 72 unsigned char dp_flag; /* bootstrap flags */ 73 unsigned char dp_shd; /* starting head */ 74 unsigned char dp_ssect; /* starting sector */ 75 unsigned char dp_scyl; /* starting cylinder */ 76 unsigned char dp_typ; /* partition type */ 77 unsigned char dp_ehd; /* end head */ 78 unsigned char dp_esect; /* end sector */ 79 unsigned char dp_ecyl; /* end cylinder */ 80 u_int32_t dp_start; /* absolute starting sector number */ 81 u_int32_t dp_size; /* partition size in sectors */ 82 }; 83 #ifdef CTASSERT 84 CTASSERT(sizeof (struct dos_partition) == DOSPARTSIZE); 85 #endif 86 87 #define DPSECT(s) ((s) & 0x3f) /* isolate relevant bits of sector */ 88 #define DPCYL(c, s) ((c) + (((s) & 0xc0)<<2)) /* and those that are cylinder */ 89 90 #define DIOCSMBR _IOW('M', 129, u_char[512]) 91 92 #endif /* !_SYS_DISKMBR_H_ */ 93