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. 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 #include <sys/types.h>
  36
  37 #define DOSBBSECTOR     0       /* DOS boot block relative sector number */
  38 #define DOSPARTOFF      446
  39 #define DOSPARTSIZE     16
  40 #define NDOSPART        4
  41 #define NEXTDOSPART     32
  42 #define DOSMAGICOFF     510
  43 #define DOSMAGIC        0xAA55
  44
  45 /*
  46  * NOTE: DragonFly BSD had been using 0xA5 forever but after many years
  47  *       we're finally shifting to our own as A5 causes conflicts in grub.
  48  */
  49 #define DOSPTYP_DFLYBSD 0x6c    /* DragonFly BSD partition type */
  50 #define DOSPTYP_386BSD  0xa5    /* 386BSD partition type */
  51 #define DOSPTYP_OPENBSD 0xa6    /* OpenBSD partition type */
  52 #define DOSPTYP_NETBSD  0xa9    /* NetBSD partition type */
  53 #define DOSPTYP_LINSWP  0x82    /* Linux swap partition */
  54 #define DOSPTYP_LINUX   0x83    /* Linux partition */
  55 #define DOSPTYP_PMBR    0xee    /* GPT Protective MBR */
  56 #define DOSPTYP_EFI     0xef    /* EFI system partition */
  57 #define DOSPTYP_EXT     0x05    /* DOS extended partition */
  58 #define DOSPTYP_EXTLBA  0x0f    /* DOS extended partition */
  59
  60 #ifndef _STANDALONE
  61 static const struct dos_ptype
  62 {
  63         unsigned char type;
  64         const char *name;
  65 } dos_ptypes[] = {
  66         { 0x00, "unused" },
  67         { 0x01, "Primary DOS with 12 bit FAT" },
  68         { 0x02, "XENIX / filesystem" },
  69         { 0x03, "XENIX /usr filesystem" },
  70         { 0x04, "Primary DOS with 16 bit FAT (<= 32MB)" },
  71         { DOSPTYP_EXT, "Extended DOS" },
  72         { 0x06, "Primary 'big' DOS (> 32MB)" },
  73         { 0x07, "OS/2 HPFS, NTFS, QNX-2 (16 bit) or Advanced UNIX" },
  74         { 0x08, "AIX filesystem" },
  75         { 0x09, "AIX boot partition or Coherent" },
  76         { 0x0A, "OS/2 Boot Manager or OPUS" },
  77         { 0x0B, "DOS or Windows 95 with 32 bit FAT" },
  78         { 0x0C, "DOS or Windows 95 with 32 bit FAT, LBA" },
  79         { 0x0E, "Primary 'big' DOS (> 32MB, LBA)" },
  80         { DOSPTYP_EXTLBA, "Extended DOS, LBA" },
  81         { 0x10, "OPUS" },
  82         { 0x11, "OS/2 BM: hidden DOS with 12-bit FAT" },
  83         { 0x12, "Compaq diagnostics" },
  84         { 0x14, "OS/2 BM: hidden DOS with 16-bit FAT (< 32MB)" },
  85         { 0x16, "OS/2 BM: hidden DOS with 16-bit FAT (>= 32MB)" },
  86         { 0x17, "OS/2 BM: hidden IFS (e.g. HPFS)" },
  87         { 0x18, "AST Windows swapfile" },
  88         { 0x24, "NEC DOS" },
  89         { 0x39, "plan9" },
  90         { 0x3C, "PartitionMagic recovery" },
  91         { 0x40, "VENIX 286" },
  92         { 0x41, "Linux/MINIX (sharing disk with DRDOS)" },
  93         { 0x42, "SFS or Linux swap (sharing disk with DRDOS)" },
  94         { 0x43, "Linux native (sharing disk with DRDOS)" },
  95         { 0x4D, "QNX 4.2 Primary" },
  96         { 0x4E, "QNX 4.2 Secondary" },
  97         { 0x4F, "QNX 4.2 Tertiary" },
  98         { 0x50, "DM" },
  99         { 0x51, "DM" },
 100         { 0x52, "CP/M or Microport SysV/AT" },
 101         { 0x53, "DM6 Aux3" },
 102         { 0x54, "DM6" },
 103         { 0x55, "EZ-Drive (disk manager)" },
 104         { 0x56, "GB" },
 105         { 0x5C, "Priam Edisk (disk manager)" }, /* according to S. Widlake */
 106         { 0x61, "Speed" },
 107         { 0x63, "ISC UNIX, other System V/386, GNU HURD or Mach" },
 108         { 0x64, "Novell Netware 2.xx" },
 109         { 0x65, "Novell Netware 3.xx" },
 110         { DOSPTYP_DFLYBSD, "DragonFly BSD" },
 111         { 0x70, "DiskSecure Multi-Boot" },
 112         { 0x75, "PCIX" },
 113         { 0x77, "QNX4.x" },
 114         { 0x78, "QNX4.x 2nd part" },
 115         { 0x79, "QNX4.x 3rd part" },
 116         { 0x80, "Minix 1.1 ... 1.4a" },
 117         { 0x81, "Minix 1.4b ... 1.5.10" },
 118         { DOSPTYP_LINSWP, "Linux swap or Solaris x86" },
 119         { DOSPTYP_LINUX, "Linux filesystem" },
 120         { 0x84, "OS/2 hidden C: drive" },
 121         { 0x85, "Linux extended" },
 122         { 0x86, "NTFS volume set??" },
 123         { 0x87, "NTFS volume set??" },
 124         { 0x93, "Amoeba filesystem" },
 125         { 0x94, "Amoeba bad block table" },
 126         { 0x9F, "BSD/OS" },
 127         { 0xA0, "Suspend to Disk" },
 128         { DOSPTYP_386BSD, "DragonFly/FreeBSD/NetBSD/386BSD" },
 129         { DOSPTYP_OPENBSD, "OpenBSD" },
 130         { 0xA7, "NEXTSTEP" },
 131         { DOSPTYP_NETBSD, "NetBSD" },
 132         { 0xAC, "IBM JFS" },
 133         { 0xB7, "BSDI BSD/386 filesystem" },
 134         { 0xB8, "BSDI BSD/386 swap" },
 135         { 0xBE, "Solaris x86 boot" },
 136         { 0xC1, "DRDOS/sec with 12-bit FAT" },
 137         { 0xC4, "DRDOS/sec with 16-bit FAT (< 32MB)" },
 138         { 0xC6, "DRDOS/sec with 16-bit FAT (>= 32MB)" },
 139         { 0xC7, "Syrinx" },
 140         { 0xDB, "Concurrent CPM or C.DOS or CTOS" },
 141         { 0xE1, "Speed" },
 142         { 0xE3, "Speed" },
 143         { 0xE4, "Speed" },
 144         { 0xEB, "BeOS file system" },
 145         { DOSPTYP_PMBR, "EFI GPT" },
 146         { DOSPTYP_EFI, "EFI System Partition" },
 147         { 0xF1, "Speed" },
 148         { 0xF2, "DOS 3.3+ Secondary" },
 149         { 0xF4, "Speed" },
 150         { 0xFE, "SpeedStor >1024 cyl. or LANstep" },
 151         { 0xFF, "BBT (Bad Blocks Table)" }
 152 };
 153 #endif /* !_STANDALONE */
 154
 155 /*
 156  * Note that sector numbers in a legacy MBR DOS partition start at 1 instead
 157  * of 0, so the first sector of the disk would be cyl 0, head 0, sector 1
 158  * and translate to block 0 in the actual disk I/O.
 159  */
 160 struct dos_partition {
 161         unsigned char   dp_flag;        /* bootstrap flags */
 162         unsigned char   dp_shd;         /* starting head */
 163         unsigned char   dp_ssect;       /* starting sector */
 164         unsigned char   dp_scyl;        /* starting cylinder */
 165         unsigned char   dp_typ;         /* partition type */
 166         unsigned char   dp_ehd;         /* end head */
 167         unsigned char   dp_esect;       /* end sector */
 168         unsigned char   dp_ecyl;        /* end cylinder */
 169         uint32_t        dp_start;       /* absolute starting sector number */
 170         uint32_t        dp_size;        /* partition size in sectors */
 171 };
 172
 173 #ifndef CTASSERT
 174 #define CTASSERT(x)             _CTASSERT(x, __LINE__)
 175 #define _CTASSERT(x, y)         __CTASSERT(x, y)
 176 #define __CTASSERT(x, y)        typedef char __assert_ ## y [(x) ? 1 : -1]
 177 #endif
 178
 179 CTASSERT(sizeof (struct dos_partition) == DOSPARTSIZE);
 180
 181 #define DPSECT(s) ((s) & 0x3f)          /* isolate relevant bits of sector */
 182 #define DPCYL(c, s) ((c) + (((s) & 0xc0)<<2)) /* and those that are cylinder */
 183
 184 #endif /* !_SYS_DISKMBR_H_ */