1/* 2 * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */ 29/* 30 * Copyright (c) 1987, 1988, 1993 31 * The Regents of the University of California. All rights reserved. 32 * 33 * Redistribution and use in source and binary forms, with or without 34 * modification, are permitted provided that the following conditions 35 * are met: 36 * 1. Redistributions of source code must retain the above copyright 37 * notice, this list of conditions and the following disclaimer. 38 * 2. Redistributions in binary form must reproduce the above copyright 39 * notice, this list of conditions and the following disclaimer in the 40 * documentation and/or other materials provided with the distribution. 41 * 3. All advertising materials mentioning features or use of this software 42 * must display the following acknowledgement: 43 * This product includes software developed by the University of 44 * California, Berkeley and its contributors. 45 * 4. Neither the name of the University nor the names of its contributors 46 * may be used to endorse or promote products derived from this software 47 * without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 59 * SUCH DAMAGE. 60 * 61 * @(#)disklabel.h 8.2 (Berkeley) 7/10/94 62 */ 63#ifndef _SYS_DISKLABEL_H_ 64#define _SYS_DISKLABEL_H_ 65 66#include <sys/appleapiopts.h> 67#include <sys/types.h> /* for daddr_t */ 68 69#ifdef __APPLE_API_OBSOLETE 70 71/* 72 * Disk description table, see disktab(5) 73 */ 74#define _PATH_DISKTAB "/etc/disktab" 75#define DISKTAB "/etc/disktab" /* deprecated */ 76 77/* 78 * Each disk has a label which includes information about the hardware 79 * disk geometry, filesystem partitions, and drive specific information. 80 * The location of the label, as well as the number of partitions the 81 * label can describe and the number of the "whole disk" (raw) 82 * paritition are machine dependent. 83 */ 84#include <machine/disklabel.h> 85 86/* 87 * The absolute maximum number of disk partitions allowed. 88 * This is the maximum value of MAXPARTITIONS for which 'struct disklabel' 89 * is <= DEV_BSIZE bytes long. If MAXPARTITIONS is greater than this, beware. 90 */ 91#define MAXMAXPARTITIONS 22 92#if MAXPARTITIONS > MAXMAXPARTITIONS 93#warning beware: MAXPARTITIONS bigger than MAXMAXPARTITIONS 94#endif 95 96/* 97 * Translate between device numbers and major/disk unit/disk partition. 98 */ 99#define DISKUNIT(dev) (minor(dev) / MAXPARTITIONS) 100#define DISKPART(dev) (minor(dev) % MAXPARTITIONS) 101#define MAKEDISKDEV(maj, unit, part) \ 102 (makedev((maj), ((unit) * MAXPARTITIONS) + (part))) 103 104#define DISKMAGIC ((u_int32_t)0x82564557) /* The disk magic number */ 105 106#ifndef LOCORE 107struct disklabel { 108 u_int32_t d_magic; /* the magic number */ 109 u_int16_t d_type; /* drive type */ 110 u_int16_t d_subtype; /* controller/d_type specific */ 111 char d_typename[16]; /* type name, e.g. "eagle" */ 112 113 /* 114 * d_packname contains the pack identifier and is returned when 115 * the disklabel is read off the disk or in-core copy. 116 * d_boot0 and d_boot1 are the (optional) names of the 117 * primary (block 0) and secondary (block 1-15) bootstraps 118 * as found in /usr/mdec. These are returned when using 119 * getdiskbyname(3) to retrieve the values from /etc/disktab. 120 */ 121 union { 122 char un_d_packname[16]; /* pack identifier */ 123 struct { 124 char *un_d_boot0; /* primary bootstrap name */ 125 char *un_d_boot1; /* secondary bootstrap name */ 126 } un_b; 127 } d_un; 128#define d_packname d_un.un_d_packname 129#define d_boot0 d_un.un_b.un_d_boot0 130#define d_boot1 d_un.un_b.un_d_boot1 131 132 /* disk geometry: */ 133 u_int32_t d_secsize; /* # of bytes per sector */ 134 u_int32_t d_nsectors; /* # of data sectors per track */ 135 u_int32_t d_ntracks; /* # of tracks per cylinder */ 136 u_int32_t d_ncylinders; /* # of data cylinders per unit */ 137 u_int32_t d_secpercyl; /* # of data sectors per cylinder */ 138 u_int32_t d_secperunit; /* # of data sectors per unit */ 139 140 /* 141 * Spares (bad sector replacements) below are not counted in 142 * d_nsectors or d_secpercyl. Spare sectors are assumed to 143 * be physical sectors which occupy space at the end of each 144 * track and/or cylinder. 145 */ 146 u_int16_t d_sparespertrack; /* # of spare sectors per track */ 147 u_int16_t d_sparespercyl; /* # of spare sectors per cylinder */ 148 /* 149 * Alternate cylinders include maintenance, replacement, configuration 150 * description areas, etc. 151 */ 152 u_int32_t d_acylinders; /* # of alt. cylinders per unit */ 153 154 /* hardware characteristics: */ 155 /* 156 * d_interleave, d_trackskew and d_cylskew describe perturbations 157 * in the media format used to compensate for a slow controller. 158 * Interleave is physical sector interleave, set up by the 159 * formatter or controller when formatting. When interleaving is 160 * in use, logically adjacent sectors are not physically 161 * contiguous, but instead are separated by some number of 162 * sectors. It is specified as the ratio of physical sectors 163 * traversed per logical sector. Thus an interleave of 1:1 164 * implies contiguous layout, while 2:1 implies that logical 165 * sector 0 is separated by one sector from logical sector 1. 166 * d_trackskew is the offset of sector 0 on track N relative to 167 * sector 0 on track N-1 on the same cylinder. Finally, d_cylskew 168 * is the offset of sector 0 on cylinder N relative to sector 0 169 * on cylinder N-1. 170 */ 171 u_int16_t d_rpm; /* rotational speed */ 172 u_int16_t d_interleave; /* hardware sector interleave */ 173 u_int16_t d_trackskew; /* sector 0 skew, per track */ 174 u_int16_t d_cylskew; /* sector 0 skew, per cylinder */ 175 u_int32_t d_headswitch; /* head switch time, usec */ 176 u_int32_t d_trkseek; /* track-to-track seek, usec */ 177 u_int32_t d_flags; /* generic flags */ 178#define NDDATA 5 179 u_int32_t d_drivedata[NDDATA]; /* drive-type specific information */ 180#define NSPARE 5 181 u_int32_t d_spare[NSPARE]; /* reserved for future use */ 182 u_int32_t d_magic2; /* the magic number (again) */ 183 u_int16_t d_checksum; /* xor of data incl. partitions */ 184 185 /* filesystem and partition information: */ 186 u_int16_t d_npartitions; /* number of partitions in following */ 187 u_int32_t d_bbsize; /* size of boot area at sn0, bytes */ 188 u_int32_t d_sbsize; /* max size of fs superblock, bytes */ 189 struct partition { /* the partition table */ 190 u_int32_t p_size; /* number of sectors in partition */ 191 u_int32_t p_offset; /* starting sector */ 192 u_int32_t p_fsize; /* filesystem basic fragment size */ 193 u_int8_t p_fstype; /* filesystem type, see below */ 194 u_int8_t p_frag; /* filesystem fragments per block */ 195 union { 196 u_int16_t cpg; /* UFS: FS cylinders per group */ 197 u_int16_t sgs; /* LFS: FS segment shift */ 198 } __partition_u1; 199#define p_cpg __partition_u1.cpg 200#define p_sgs __partition_u1.sgs 201 } d_partitions[MAXPARTITIONS]; /* actually may be more */ 202}; 203#else /* LOCORE */ 204 /* 205 * offsets for asm boot files. 206 */ 207 .set d_secsize,40 208 .set d_nsectors,44 209 .set d_ntracks,48 210 .set d_ncylinders,52 211 .set d_secpercyl,56 212 .set d_secperunit,60 213 .set d_end_,276 /* size of disk label */ 214#endif /* LOCORE */ 215 216/* d_type values: */ 217#define DTYPE_SMD 1 /* SMD, XSMD; VAX hp/up */ 218#define DTYPE_MSCP 2 /* MSCP */ 219#define DTYPE_DEC 3 /* other DEC (rk, rl) */ 220#define DTYPE_SCSI 4 /* SCSI */ 221#define DTYPE_ESDI 5 /* ESDI interface */ 222#define DTYPE_ST506 6 /* ST506 etc. */ 223#define DTYPE_HPIB 7 /* CS/80 on HP-IB */ 224#define DTYPE_HPFL 8 /* HP Fiber-link */ 225#define DTYPE_FLOPPY 10 /* floppy */ 226 227#ifdef DKTYPENAMES 228static const char *dktypenames[] = { 229 "unknown", 230 "SMD", 231 "MSCP", 232 "old DEC", 233 "SCSI", 234 "ESDI", 235 "ST506", 236 "HP-IB", 237 "HP-FL", 238 "type 9", 239 "floppy", 240 NULL 241}; 242#define DKMAXTYPES (sizeof(dktypenames) / sizeof(dktypenames[0]) - 1) 243#endif 244 245/* 246 * Filesystem type and version. 247 * Used to interpret other filesystem-specific 248 * per-partition information. 249 */ 250#define FS_UNUSED 0 /* unused */ 251#define FS_SWAP 1 /* swap */ 252#define FS_V6 2 /* Sixth Edition */ 253#define FS_V7 3 /* Seventh Edition */ 254#define FS_SYSV 4 /* System V */ 255#define FS_V71K 5 /* V7 with 1K blocks (4.1, 2.9) */ 256#define FS_V8 6 /* Eighth Edition, 4K blocks */ 257#define FS_BSDFFS 7 /* 4.2BSD fast file system */ 258#define FS_MSDOS 8 /* MSDOS file system */ 259#define FS_BSDLFS 9 /* 4.4BSD log-structured file system */ 260#define FS_OTHER 10 /* in use, but unknown/unsupported */ 261#define FS_HPFS 11 /* OS/2 high-performance file system */ 262#define FS_ISO9660 12 /* ISO 9660, normally CD-ROM */ 263#define FS_BOOT 13 /* partition contains bootstrap */ 264#define FS_ADOS 14 /* AmigaDOS fast file system */ 265#define FS_HFS 15 /* Macintosh HFS */ 266 267#ifdef DKTYPENAMES 268static const char *fstypenames[] = { 269 "unused", 270 "swap", 271 "Version 6", 272 "Version 7", 273 "System V", 274 "4.1BSD", 275 "Eighth Edition", 276 "4.2BSD", 277 "MSDOS", 278 "4.4LFS", 279 "unknown", 280 "HPFS", 281 "ISO9660", 282 "boot", 283 "ADOS", 284 "HFS", 285 NULL 286}; 287#define FSMAXTYPES (sizeof(fstypenames) / sizeof(fstypenames[0]) - 1) 288#endif 289 290/* 291 * flags shared by various drives: 292 */ 293#define D_REMOVABLE 0x01 /* removable media */ 294#define D_ECC 0x02 /* supports ECC */ 295#define D_BADSECT 0x04 /* supports bad sector forw. */ 296#define D_RAMDISK 0x08 /* disk emulator */ 297#define D_CHAIN 0x10 /* can do back-back transfers */ 298 299/* 300 * Drive data for SMD. 301 */ 302#define d_smdflags d_drivedata[0] 303#define D_SSE 0x1 /* supports skip sectoring */ 304#define d_mindist d_drivedata[1] 305#define d_maxdist d_drivedata[2] 306#define d_sdist d_drivedata[3] 307 308/* 309 * Drive data for ST506. 310 */ 311#define d_precompcyl d_drivedata[0] 312#define d_gap3 d_drivedata[1] /* used only when formatting */ 313 314/* 315 * Drive data for SCSI. 316 */ 317#define d_blind d_drivedata[0] 318 319#ifndef LOCORE 320/* 321 * Structure used to perform a format or other raw operation, returning 322 * data and/or register values. Register identification and format 323 * are device- and driver-dependent. 324 */ 325struct format_op { 326 char *df_buf; 327 int df_count; /* value-result */ 328 daddr_t df_startblk; 329 int df_reg[8]; /* result */ 330}; 331 332/* 333 * Structure used internally to retrieve information about a partition 334 * on a disk. 335 */ 336struct partinfo { 337 struct disklabel *disklab; 338 struct partition *part; 339}; 340 341/* 342 * Disk-specific ioctls. 343 */ 344 /* get and set disklabel; DIOCGPART used internally */ 345#define DIOCGDINFO _IOR('d', 101, struct disklabel)/* get */ 346#define DIOCSDINFO _IOW('d', 102, struct disklabel)/* set */ 347#define DIOCWDINFO _IOW('d', 103, struct disklabel)/* set, update disk */ 348#define DIOCGPART _IOW('d', 104, struct partinfo) /* get partition */ 349 350/* do format operation, read or write */ 351#define DIOCRFORMAT _IOWR('d', 105, struct format_op) 352#define DIOCWFORMAT _IOWR('d', 106, struct format_op) 353 354#define DIOCSSTEP _IOW('d', 107, int) /* set step rate */ 355#define DIOCSRETRIES _IOW('d', 108, int) /* set # of retries */ 356#define DIOCWLABEL _IOW('d', 109, int) /* write en/disable label */ 357 358#define DIOCSBAD _IOW('d', 110, struct dkbad) /* set kernel dkbad */ 359 360#endif /* LOCORE */ 361 362#if !defined(KERNEL) && !defined(LOCORE) 363 364#include <sys/cdefs.h> 365 366__BEGIN_DECLS 367struct disklabel *getdiskbyname(const char *); 368__END_DECLS 369 370#endif 371 372#endif /* __APPLE_API_OBSOLETE */ 373 374#endif /* ! _SYS_DISKLABEL_H_ */ 375 376