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. 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 * @(#)disklabel.h 8.2 (Berkeley) 7/10/94 30 */ 31 32 #ifndef _SYS_DISKMBR_H_ 33 #define _SYS_DISKMBR_H_ 34 35 #ifndef _SYS_TYPES_H_ 36 #include <sys/types.h> 37 #endif 38 #ifndef _SYS_IOCCOM_H_ 39 #include <sys/ioccom.h> 40 #endif 41 42 #define DOSBBSECTOR 0 /* DOS boot block relative sector number */ 43 #define DOSPARTOFF 446 44 #define DOSPARTSIZE 16 45 #define NDOSPART 4 46 #define NEXTDOSPART 32 47 #define DOSMAGICOFFSET 510 48 #define DOSMAGIC 0xAA55 49 50 /* 51 * NOTE: DragonFlyBSD had been using 0xA5 forever but after many years 52 * we're finally shifting to our own as A5 causes conflicts in grub. 53 */ 54 #define DOSPTYP_DFLYBSD 0x6c /* DragonFlyBSD partition type */ 55 #define DOSPTYP_386BSD 0xa5 /* 386BSD partition type */ 56 #define DOSPTYP_OPENBSD 0xa6 /* OpenBSD partition type */ 57 #define DOSPTYP_NETBSD 0xa9 /* NetBSD partition type */ 58 #define DOSPTYP_LINSWP 0x82 /* Linux swap partition */ 59 #define DOSPTYP_LINUX 0x83 /* Linux partition */ 60 #define DOSPTYP_PMBR 0xee /* GPT Protective MBR */ 61 #define DOSPTYP_EFI 0xef /* EFI system partition */ 62 #define DOSPTYP_EXT 5 /* DOS extended partition */ 63 #define DOSPTYP_EXTLBA 15 /* DOS extended partition */ 64 65 /* 66 * Note that sector numbers in a legacy MBR DOS partition start at 1 instead 67 * of 0, so the first sector of the disk would be cyl 0, head 0, sector 1 68 * and translate to block 0 in the actual disk I/O. 69 */ 70 struct dos_partition { 71 unsigned char dp_flag; /* bootstrap flags */ 72 unsigned char dp_shd; /* starting head */ 73 unsigned char dp_ssect; /* starting sector */ 74 unsigned char dp_scyl; /* starting cylinder */ 75 unsigned char dp_typ; /* partition type */ 76 unsigned char dp_ehd; /* end head */ 77 unsigned char dp_esect; /* end sector */ 78 unsigned char dp_ecyl; /* end cylinder */ 79 u_int32_t dp_start; /* absolute starting sector number */ 80 u_int32_t dp_size; /* partition size in sectors */ 81 }; 82 #ifdef CTASSERT 83 CTASSERT(sizeof (struct dos_partition) == DOSPARTSIZE); 84 #endif 85 86 #define DPSECT(s) ((s) & 0x3f) /* isolate relevant bits of sector */ 87 #define DPCYL(c, s) ((c) + (((s) & 0xc0)<<2)) /* and those that are cylinder */ 88 89 #define DIOCSMBR _IOW('M', 129, u_char[512]) 90 91 #endif /* !_SYS_DISKMBR_H_ */ 92