disklabel.h revision 1.13
1/* $OpenBSD: disklabel.h,v 1.13 2006/06/11 21:15:35 krw Exp $ */ 2/* $NetBSD: disklabel.h,v 1.1 1995/02/13 23:07:34 cgd 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 37enum disklabel_tag { DLT_ALPHA, DLT_I386 }; 38 39/* 40 * What disklabels are we probing for, and in which order? 41 */ 42#ifndef LABELPROBES 43#define LABELPROBES DLT_ALPHA, DLT_I386 44#endif 45 46#define ALPHA_LABELSECTOR 0 /* sector containing label */ 47#define ALPHA_LABELOFFSET 64 /* offset of label in sector */ 48#define I386_LABELSECTOR 1 /* sector containing label */ 49#define I386_LABELOFFSET 0 /* offset of label in sector */ 50 51#define LABELSECTOR ALPHA_LABELSECTOR 52#define LABELOFFSET ALPHA_LABELOFFSET 53 54#define MAXPARTITIONS 16 /* number of partitions */ 55#define RAW_PART 2 /* raw partition: xx?c */ 56 57/* DOS partition table -- located in boot block */ 58#define DOSBBSECTOR 0 /* DOS boot block relative sector # */ 59#define DOSPARTOFF 446 60#define DOSACTIVE 0x80 61#define NDOSPART 4 62#define DOSMBR_SIGNATURE 0xaa55 63#define DOSMBR_SIGNATURE_OFF 0x1fe 64 65struct dos_partition { 66 u_int8_t dp_flag; /* bootstrap flags */ 67 u_int8_t dp_shd; /* starting head */ 68 u_int8_t dp_ssect; /* starting sector */ 69 u_int8_t dp_scyl; /* starting cylinder */ 70 u_int8_t dp_typ; /* partition type (see below) */ 71 u_int8_t dp_ehd; /* end head */ 72 u_int8_t dp_esect; /* end sector */ 73 u_int8_t dp_ecyl; /* end cylinder */ 74 u_int32_t dp_start; /* absolute starting sector number */ 75 u_int32_t dp_size; /* partition size in sectors */ 76}; 77 78/* Known DOS partition types. */ 79#define DOSPTYP_UNUSED 0x00 /* Unused partition */ 80#define DOSPTYP_FAT12 0x01 /* 12-bit FAT */ 81#define DOSPTYP_FAT16S 0x04 /* 16-bit FAT, less than 32M */ 82#define DOSPTYP_EXTEND 0x05 /* Extended; contains sub-partitions */ 83#define DOSPTYP_FAT16B 0x06 /* 16-bit FAT, more than 32M */ 84#define DOSPTYP_FAT32 0x0b /* 32-bit FAT */ 85#define DOSPTYP_FAT32L 0x0c /* 32-bit FAT, LBA-mapped */ 86#define DOSPTYP_FAT16L 0x0e /* 16-bit FAT, LBA-mapped */ 87#define DOSPTYP_EXTENDL 0x0f /* Extended, LBA-mapped; contains sub-partitions */ 88#define DOSPTYP_ONTRACK 0x54 89#define DOSPTYP_LINUX 0x83 /* That other thing */ 90#define DOSPTYP_FREEBSD 0xa5 /* FreeBSD partition type */ 91#define DOSPTYP_OPENBSD 0xa6 /* OpenBSD partition type */ 92#define DOSPTYP_NETBSD 0xa9 /* NetBSD partition type */ 93 94/* Isolate the relevant bits to get sector and cylinder. */ 95#define DPSECT(s) ((s) & 0x3f) 96#define DPCYL(c, s) ((c) + (((s) & 0xc0) << 2)) 97 98/* 99 * describes ados Rigid Disk Blocks 100 * which are used to partition a drive 101 */ 102#define RDBNULL ((u_int32_t)0xffffffff) 103 104/* 105 * you will find rdblock somewhere in [0, RDBMAXBLOCKS) 106 */ 107#define RDB_MAXBLOCKS 16 108 109struct rdblock { 110 u_int32_t id; /* 'RDSK' */ 111 u_int32_t nsumlong; /* number of longs in check sum */ 112 u_int32_t chksum; /* simple additive with wrap checksum */ 113 u_int32_t hostid; /* scsi target of host */ 114 u_int32_t nbytes; /* size of disk blocks */ 115 u_int32_t flags; 116 u_int32_t badbhead; /* linked list of badblocks */ 117 u_int32_t partbhead; /* linked list of partblocks */ 118 u_int32_t fsbhead; /* " " of fsblocks */ 119 u_int32_t driveinit; 120 u_int32_t resv1[6]; /* RDBNULL */ 121 u_int32_t ncylinders; /* number of cylinders on drive */ 122 u_int32_t nsectors; /* number of sectors per track */ 123 u_int32_t nheads; /* number of tracks per cylinder */ 124 u_int32_t interleave; 125 u_int32_t park; /* only used with st506 i.e. not */ 126 u_int32_t resv2[3]; 127 u_int32_t wprecomp; /* start cyl for write precomp */ 128 u_int32_t reducedwrite; /* start cyl for reduced write current */ 129 u_int32_t steprate; /* driver step rate in ?s */ 130 u_int32_t resv3[5]; 131 u_int32_t rdblowb; /* lowblock of range for rdb's */ 132 u_int32_t rdbhighb; /* high block of range for rdb's */ 133 u_int32_t lowcyl; /* low cylinder of partition area */ 134 u_int32_t highcyl; /* upper cylinder of partition area */ 135 u_int32_t secpercyl; /* number of sectors per cylinder */ 136 u_int32_t parkseconds; /* zero if no park needed */ 137 u_int32_t resv4[2]; 138 char diskvendor[8]; /* inquiry stuff */ 139 char diskproduct[16]; /* inquiry stuff */ 140 char diskrevision[4]; /* inquiry stuff */ 141 char contvendor[8]; /* inquiry stuff */ 142 char contproduct[16]; /* inquiry stuff */ 143 char contrevision[4]; /* inquiry stuff */ 144#if never_use_secsize 145 u_int32_t resv5[0]; 146#endif 147}; 148 149 150#define RDBF_LAST 0x1 /* last drive available */ 151#define RDBF_LASTLUN 0x2 /* last LUN available */ 152#define RDBF_LASTUNIT 0x4 /* last target available */ 153#define RDBF_NORESELECT 0x8 /* do not use reselect */ 154#define RDBF_DISKID 0x10 /* disk id is valid ?? */ 155#define RDBF_CTRLID 0x20 /* ctrl id is valid ?? */ 156#define RDBF_SYNC 0x40 /* drive supports SCSI synchronous mode */ 157 158struct ados_environ { 159 u_int32_t tabsize; /* 0: environ table size */ 160 u_int32_t sizeblock; /* 1: n long words in a block */ 161 u_int32_t secorg; /* 2: not used must be zero */ 162 u_int32_t numheads; /* 3: number of surfaces */ 163 u_int32_t secperblk; /* 4: must be 1 */ 164 u_int32_t secpertrk; /* 5: blocks per track */ 165 u_int32_t resvblocks; /* 6: reserved blocks at start */ 166 u_int32_t prefac; /* 7: must be 0 */ 167 u_int32_t interleave; /* 8: normally 1 */ 168 u_int32_t lowcyl; /* 9: low cylinder of partition */ 169 u_int32_t highcyl; /* 10: upper cylinder of partition */ 170 u_int32_t numbufs; /* 11: ados: number of buffers */ 171 u_int32_t membuftype; /* 12: ados: type of bufmem */ 172 u_int32_t maxtrans; /* 13: maxtrans the ctrlr supports */ 173 u_int32_t mask; /* 14: mask for valid address */ 174 u_int32_t bootpri; /* 15: boot priority for autoboot */ 175 u_int32_t dostype; /* 16: filesystem type */ 176 u_int32_t baud; /* 17: serial handler baud rate */ 177 u_int32_t control; /* 18: control word for fs */ 178 u_int32_t bootblocks; /* 19: blocks containing boot code */ 179 u_int32_t fsize; /* 20: file system block size */ 180 u_int32_t frag; /* 21: allowable frags per block */ 181 u_int32_t cpg; /* 22: cylinders per group */ 182}; 183 184struct partblock { 185 u_int32_t id; /* 'PART' */ 186 u_int32_t nsumlong; /* number of longs in check sum */ 187 u_int32_t chksum; /* simple additive with wrap checksum */ 188 u_int32_t hostid; /* scsi target of host */ 189 u_int32_t next; /* next in chain */ 190 u_int32_t flags; /* see below */ 191 u_int32_t resv1[3]; 192 u_char partname[32]; /* (BCPL) part name (may not be unique) */ 193 u_int32_t resv2[15]; 194 struct ados_environ e; 195#if never_use_secsize 196 u_int32_t extra[9]; /* 8 for extra added to environ */ 197#endif 198}; 199 200#define PBF_BOOTABLE 0x1 /* partition is bootable */ 201#define PBF_NOMOUNT 0x2 /* partition should be mounted */ 202 203struct badblock { 204 u_int32_t id; /* 'BADB' */ 205 u_int32_t nsumlong; /* number of longs in check sum */ 206 u_int32_t chksum; /* simple additive with wrap checksum */ 207 u_int32_t hostid; /* scsi target of host */ 208 u_int32_t next; /* next in chain */ 209 u_int32_t resv; 210 struct badblockent { 211 u_int32_t badblock; 212 u_int32_t goodblock; 213 } badtab[0]; /* 61 for secsize == 512 */ 214}; 215 216struct fsblock { 217 u_int32_t id; /* 'FSHD' */ 218 u_int32_t nsumlong; /* number of longs in check sum */ 219 u_int32_t chksum; /* simple additive with wrap checksum */ 220 u_int32_t hostid; /* scsi target of host */ 221 u_int32_t next; /* next in chain */ 222 u_int32_t flags; 223 u_int32_t resv1[2]; 224 u_int32_t dostype; /* this is a file system for this type */ 225 u_int32_t version; /* version of this fs */ 226 u_int32_t patchflags; /* describes which functions to replace */ 227 u_int32_t type; /* zero */ 228 u_int32_t task; /* zero */ 229 u_int32_t lock; /* zero */ 230 u_int32_t handler; /* zero */ 231 u_int32_t stacksize; /* to use when loading handler */ 232 u_int32_t priority; /* to run the fs at. */ 233 u_int32_t startup; /* zero */ 234 u_int32_t lsegblocks; /* linked list of lsegblocks of fs code */ 235 u_int32_t globalvec; /* bcpl vector not used mostly */ 236#if never_use_secsize 237 u_int32_t resv2[44]; 238#endif 239}; 240 241struct lsegblock { 242 u_int32_t id; /* 'LSEG' */ 243 u_int32_t nsumlong; /* number of longs in check sum */ 244 u_int32_t chksum; /* simple additive with wrap checksum */ 245 u_int32_t hostid; /* scsi target of host */ 246 u_int32_t next; /* next in chain */ 247 u_int32_t loaddata[0]; /* load segment data, 123 for secsize == 512 */ 248}; 249 250#define RDBLOCK_ID 0x5244534b /* 'RDSK' */ 251#define PARTBLOCK_ID 0x50415254 /* 'PART' */ 252#define BADBLOCK_ID 0x42414442 /* 'BADB' */ 253#define FSBLOCK_ID 0x46534844 /* 'FSHD' */ 254#define LSEGBLOCK_ID 0x4c534547 /* 'LSEG' */ 255 256#include <sys/dkbad.h> 257struct cpu_disklabel { 258 enum disklabel_tag labeltag; 259 int labelsector; 260 union { 261 struct { 262 } _alpha; 263 struct { 264 struct dos_partition dosparts[NDOSPART]; 265 struct dkbad bad; 266 } _i386; 267 } u; 268}; 269 270#define DKBAD(x) ((x)->u._i386.bad) 271 272#endif /* _MACHINE_DISKLABEL_H_ */ 273