disklabel.h revision 1.8
1/* $OpenBSD: disklabel.h,v 1.8 1998/01/11 20:41:57 provos 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, DLT_AMIGA }; 38 39/* 40 * What disklabels are we probing for, and in which order? 41 */ 42#ifndef LABELPROBES 43#define LABELPROBES DLT_ALPHA, DLT_I386, DLT_AMIGA 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#define AMIGA_LABELSECTOR 0 /* sector containing label */ 51#define AMIGA_LABELOFFSET 64 /* offset of label in sector */ 52 53#define LABELSECTOR ALPHA_LABELSECTOR 54#define LABELOFFSET ALPHA_LABELOFFSET 55 56#define MAXPARTITIONS 16 /* number of partitions */ 57#define RAW_PART 2 /* raw partition: xx?c */ 58 59/* DOS partition table -- located in boot block */ 60#define DOSBBSECTOR 0 /* DOS boot block relative sector # */ 61#define DOSPARTOFF 446 62#define DOSACTIVE 0x80 63#define NDOSPART 4 64#define DOSMBR_SIGNATURE 0xaa55 65 66struct dos_partition { 67 u_int8_t dp_flag; /* bootstrap flags */ 68 u_int8_t dp_shd; /* starting head */ 69 u_int8_t dp_ssect; /* starting sector */ 70 u_int8_t dp_scyl; /* starting cylinder */ 71 u_int8_t dp_typ; /* partition type (see below) */ 72 u_int8_t dp_ehd; /* end head */ 73 u_int8_t dp_esect; /* end sector */ 74 u_int8_t dp_ecyl; /* end cylinder */ 75 u_int32_t dp_start; /* absolute starting sector number */ 76 u_int32_t dp_size; /* partition size in sectors */ 77}; 78 79/* Known DOS partition types. */ 80#define DOSPTYP_UNUSED 0x00 /* Unused partition */ 81#define DOSPTYP_FAT12 0x01 /* 12-bit FAT */ 82#define DOSPTYP_FAT16S 0x04 /* 16-bit FAT, less than 32M */ 83#define DOSPTYP_EXTEND 0x05 /* Extended; contains sub-partitions */ 84#define DOSPTYP_FAT16B 0x06 /* 16-bit FAT, more than 32M */ 85#define DOSPTYP_FAT32 0x0b /* 32-bit FAT */ 86#define DOSPTYP_FAT16C 0x0e /* 16-bit FAT, CHS-mapped */ 87#define DOSPTYP_ONTRACK 0x54 88#define DOSPTYP_LINUX 0x83 /* That other thing */ 89#define DOSPTYP_386BSD 0xa5 /* 386BSD partition type */ 90#define DOSPTYP_NETBSD DOSPTYP_386BSD /* NetBSD partition type (XXX) */ 91#define DOSPTYP_OPENBSD 0xa6 /* OpenBSD partition type */ 92 93/* Isolate the relevant bits to get sector and cylinder. */ 94#define DPSECT(s) ((s) & 0x3f) 95#define DPCYL(c, s) ((c) + (((s) & 0xc0) << 2)) 96 97/* 98 * describes ados Rigid Disk Blocks 99 * which are used to partition a drive 100 */ 101#define RDBNULL ((u_int32_t)0xffffffff) 102 103/* 104 * you will find rdblock somewhere in [0, RDBMAXBLOCKS) 105 */ 106#define RDB_MAXBLOCKS 16 107 108struct rdblock { 109 u_int32_t id; /* 'RDSK' */ 110 u_int32_t nsumlong; /* number of longs in check sum */ 111 u_int32_t chksum; /* simple additive with wrap checksum */ 112 u_int32_t hostid; /* scsi target of host */ 113 u_int32_t nbytes; /* size of disk blocks */ 114 u_int32_t flags; 115 u_int32_t badbhead; /* linked list of badblocks */ 116 u_int32_t partbhead; /* linked list of partblocks */ 117 u_int32_t fsbhead; /* " " of fsblocks */ 118 u_int32_t driveinit; 119 u_int32_t resv1[6]; /* RDBNULL */ 120 u_int32_t ncylinders; /* number of cylinders on drive */ 121 u_int32_t nsectors; /* number of sectors per track */ 122 u_int32_t nheads; /* number of tracks per cylinder */ 123 u_int32_t interleave; 124 u_int32_t park; /* only used with st506 i.e. not */ 125 u_int32_t resv2[3]; 126 u_int32_t wprecomp; /* start cyl for write precomp */ 127 u_int32_t reducedwrite; /* start cyl for reduced write current */ 128 u_int32_t steprate; /* driver step rate in ?s */ 129 u_int32_t resv3[5]; 130 u_int32_t rdblowb; /* lowblock of range for rdb's */ 131 u_int32_t rdbhighb; /* high block of range for rdb's */ 132 u_int32_t lowcyl; /* low cylinder of partition area */ 133 u_int32_t highcyl; /* upper cylinder of partition area */ 134 u_int32_t secpercyl; /* number of sectors per cylinder */ 135 u_int32_t parkseconds; /* zero if no park needed */ 136 u_int32_t resv4[2]; 137 char diskvendor[8]; /* inquiry stuff */ 138 char diskproduct[16]; /* inquiry stuff */ 139 char diskrevision[4]; /* inquiry stuff */ 140 char contvendor[8]; /* inquiry stuff */ 141 char contproduct[16]; /* inquiry stuff */ 142 char contrevision[4]; /* inquiry stuff */ 143#if never_use_secsize 144 u_int32_t resv5[0]; 145#endif 146}; 147 148 149#define RDBF_LAST 0x1 /* last drive available */ 150#define RDBF_LASTLUN 0x2 /* last LUN available */ 151#define RDBF_LASTUNIT 0x4 /* last target available */ 152#define RDBF_NORESELECT 0x8 /* do not use reselect */ 153#define RDBF_DISKID 0x10 /* disk id is valid ?? */ 154#define RDBF_CTRLID 0x20 /* ctrl id is valid ?? */ 155#define RDBF_SYNC 0x40 /* drive supports SCSI synchronous mode */ 156 157struct ados_environ { 158 u_int32_t tabsize; /* 0: environ table size */ 159 u_int32_t sizeblock; /* 1: n long words in a block */ 160 u_int32_t secorg; /* 2: not used must be zero */ 161 u_int32_t numheads; /* 3: number of surfaces */ 162 u_int32_t secperblk; /* 4: must be 1 */ 163 u_int32_t secpertrk; /* 5: blocks per track */ 164 u_int32_t resvblocks; /* 6: reserved blocks at start */ 165 u_int32_t prefac; /* 7: must be 0 */ 166 u_int32_t interleave; /* 8: normally 1 */ 167 u_int32_t lowcyl; /* 9: low cylinder of partition */ 168 u_int32_t highcyl; /* 10: upper cylinder of partition */ 169 u_int32_t numbufs; /* 11: ados: number of buffers */ 170 u_int32_t membuftype; /* 12: ados: type of bufmem */ 171 u_int32_t maxtrans; /* 13: maxtrans the ctrlr supports */ 172 u_int32_t mask; /* 14: mask for valid address */ 173 u_int32_t bootpri; /* 15: boot priority for autoboot */ 174 u_int32_t dostype; /* 16: filesystem type */ 175 u_int32_t baud; /* 17: serial handler baud rate */ 176 u_int32_t control; /* 18: control word for fs */ 177 u_int32_t bootblocks; /* 19: blocks containing boot code */ 178 u_int32_t fsize; /* 20: file system block size */ 179 u_int32_t frag; /* 21: allowable frags per block */ 180 u_int32_t cpg; /* 22: cylinders per group */ 181}; 182 183struct partblock { 184 u_int32_t id; /* 'PART' */ 185 u_int32_t nsumlong; /* number of longs in check sum */ 186 u_int32_t chksum; /* simple additive with wrap checksum */ 187 u_int32_t hostid; /* scsi target of host */ 188 u_int32_t next; /* next in chain */ 189 u_int32_t flags; /* see below */ 190 u_int32_t resv1[3]; 191 u_char partname[32]; /* (BCPL) part name (may not be unique) */ 192 u_int32_t resv2[15]; 193 struct ados_environ e; 194#if never_use_secsize 195 u_int32_t extra[9]; /* 8 for extra added to environ */ 196#endif 197}; 198 199#define PBF_BOOTABLE 0x1 /* partition is bootable */ 200#define PBF_NOMOUNT 0x2 /* partition should be mounted */ 201 202struct badblock { 203 u_int32_t id; /* 'BADB' */ 204 u_int32_t nsumlong; /* number of longs in check sum */ 205 u_int32_t chksum; /* simple additive with wrap checksum */ 206 u_int32_t hostid; /* scsi target of host */ 207 u_int32_t next; /* next in chain */ 208 u_int32_t resv; 209 struct badblockent { 210 u_int32_t badblock; 211 u_int32_t goodblock; 212 } badtab[0]; /* 61 for secsize == 512 */ 213}; 214 215struct fsblock { 216 u_int32_t id; /* 'FSHD' */ 217 u_int32_t nsumlong; /* number of longs in check sum */ 218 u_int32_t chksum; /* simple additive with wrap checksum */ 219 u_int32_t hostid; /* scsi target of host */ 220 u_int32_t next; /* next in chain */ 221 u_int32_t flags; 222 u_int32_t resv1[2]; 223 u_int32_t dostype; /* this is a file system for this type */ 224 u_int32_t version; /* version of this fs */ 225 u_int32_t patchflags; /* describes which functions to replace */ 226 u_int32_t type; /* zero */ 227 u_int32_t task; /* zero */ 228 u_int32_t lock; /* zero */ 229 u_int32_t handler; /* zero */ 230 u_int32_t stacksize; /* to use when loading handler */ 231 u_int32_t priority; /* to run the fs at. */ 232 u_int32_t startup; /* zero */ 233 u_int32_t lsegblocks; /* linked list of lsegblocks of fs code */ 234 u_int32_t globalvec; /* bcpl vector not used mostly */ 235#if never_use_secsize 236 u_int32_t resv2[44]; 237#endif 238}; 239 240struct lsegblock { 241 u_int32_t id; /* 'LSEG' */ 242 u_int32_t nsumlong; /* number of longs in check sum */ 243 u_int32_t chksum; /* simple additive with wrap checksum */ 244 u_int32_t hostid; /* scsi target of host */ 245 u_int32_t next; /* next in chain */ 246 u_int32_t loaddata[0]; /* load segment data, 123 for secsize == 512 */ 247}; 248 249#define RDBLOCK_ID 0x5244534b /* 'RDSK' */ 250#define PARTBLOCK_ID 0x50415254 /* 'PART' */ 251#define BADBLOCK_ID 0x42414442 /* 'BADB' */ 252#define FSBLOCK_ID 0x46534844 /* 'FSHD' */ 253#define LSEGBLOCK_ID 0x4c534547 /* 'LSEG' */ 254 255#include <sys/dkbad.h> 256struct cpu_disklabel { 257 enum disklabel_tag labeltag; 258 int labelsector; 259 union { 260 struct { 261 } _alpha; 262 struct { 263 struct dos_partition dosparts[NDOSPART]; 264 struct dkbad bad; 265 } _i386; 266 struct { 267 u_int32_t rdblock; /* RDBNULL -> inval. */ 268 u_int32_t pblist[MAXPARTITIONS];/* pblock number */ 269 int pbindex[MAXPARTITIONS]; /* index of pblock */ 270 int valid; /* valid? */ 271 } _amiga; 272 } u; 273}; 274 275#define DKBAD(x) ((x)->u._i386.bad) 276 277#endif /* _MACHINE_DISKLABEL_H_ */ 278