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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)disklabel.h 8.2 (Berkeley) 7/10/94 34 * $FreeBSD: src/sys/sys/disklabel.h,v 1.49.2.7 2001/05/27 05:58:26 jkh Exp $ 35 * $DragonFly: src/sys/sys/disklabel.h,v 1.21 2007/05/17 03:20:11 dillon Exp $ 36 */ 37 38 #ifndef _SYS_DISKLABEL_H_ 39 #define _SYS_DISKLABEL_H_ 40 41 #ifndef _SYS_TYPES_H_ 42 #include <sys/types.h> 43 #endif 44 #if defined(_KERNEL) && !defined(_SYS_SYSTM_H_) 45 #include <sys/systm.h> 46 #endif 47 #ifndef _SYS_IOCCOM_H_ 48 #include <sys/ioccom.h> 49 #endif 50 #if defined(_KERNEL) && !defined(_SYS_CONF_H_) 51 #include <sys/conf.h> /* for make_sub_dev() */ 52 #endif 53 54 /* 55 * Disk description table, see disktab(5) 56 */ 57 #define _PATH_DISKTAB "/etc/disktab" 58 #define DISKTAB "/etc/disktab" /* deprecated */ 59 60 /* 61 * Each disk has a label which includes information about the hardware 62 * disk geometry, filesystem partitions, and drive specific information. 63 * The label is in block 0 or 1, possibly offset from the beginning 64 * to leave room for a bootstrap, etc. 65 */ 66 67 /* XXX these should be defined per controller (or drive) elsewhere, not here! */ 68 #ifdef __i386__ 69 #define LABELSECTOR 1 /* sector containing label */ 70 #define LABELOFFSET 0 /* offset of label in sector */ 71 #endif 72 73 #ifndef LABELSECTOR 74 #define LABELSECTOR 0 /* sector containing label */ 75 #endif 76 77 #ifndef LABELOFFSET 78 #define LABELOFFSET 64 /* offset of label in sector */ 79 #endif 80 81 #define DISKMAGIC ((u_int32_t)0x82564557) /* The disk magic number */ 82 #ifndef MAXPARTITIONS 83 #define MAXPARTITIONS 16 84 #endif 85 86 #define LABEL_PART 2 /* partition containing label */ 87 #define RAW_PART 2 /* partition containing whole disk */ 88 #define SWAP_PART 1 /* partition normally containing swap */ 89 90 #ifndef LOCORE 91 struct disklabel { 92 u_int32_t d_magic; /* the magic number */ 93 u_int16_t d_type; /* drive type */ 94 u_int16_t d_subtype; /* controller/d_type specific */ 95 char d_typename[16]; /* type name, e.g. "eagle" */ 96 97 /* 98 * d_packname contains the pack identifier and is returned when 99 * the disklabel is read off the disk or in-core copy. 100 * d_boot0 and d_boot1 are the (optional) names of the 101 * primary (block 0) and secondary (block 1-15) bootstraps 102 * as found in /boot. These are returned when using 103 * getdiskbyname(3) to retrieve the values from /etc/disktab. 104 */ 105 union { 106 char un_d_packname[16]; /* pack identifier */ 107 struct { 108 char *un_d_boot0; /* primary bootstrap name */ 109 char *un_d_boot1; /* secondary bootstrap name */ 110 } un_b; 111 } d_un; 112 #define d_packname d_un.un_d_packname 113 #define d_boot0 d_un.un_b.un_d_boot0 114 #define d_boot1 d_un.un_b.un_d_boot1 115 116 /* disk geometry: */ 117 u_int32_t d_secsize; /* # of bytes per sector */ 118 u_int32_t d_nsectors; /* # of data sectors per track */ 119 u_int32_t d_ntracks; /* # of tracks per cylinder */ 120 u_int32_t d_ncylinders; /* # of data cylinders per unit */ 121 u_int32_t d_secpercyl; /* # of data sectors per cylinder */ 122 u_int32_t d_secperunit; /* # of data sectors per unit */ 123 124 /* 125 * Spares (bad sector replacements) below are not counted in 126 * d_nsectors or d_secpercyl. Spare sectors are assumed to 127 * be physical sectors which occupy space at the end of each 128 * track and/or cylinder. 129 */ 130 u_int16_t d_sparespertrack; /* # of spare sectors per track */ 131 u_int16_t d_sparespercyl; /* # of spare sectors per cylinder */ 132 /* 133 * Alternate cylinders include maintenance, replacement, configuration 134 * description areas, etc. 135 */ 136 u_int32_t d_acylinders; /* # of alt. cylinders per unit */ 137 138 /* hardware characteristics: */ 139 /* 140 * d_interleave, d_trackskew and d_cylskew describe perturbations 141 * in the media format used to compensate for a slow controller. 142 * Interleave is physical sector interleave, set up by the 143 * formatter or controller when formatting. When interleaving is 144 * in use, logically adjacent sectors are not physically 145 * contiguous, but instead are separated by some number of 146 * sectors. It is specified as the ratio of physical sectors 147 * traversed per logical sector. Thus an interleave of 1:1 148 * implies contiguous layout, while 2:1 implies that logical 149 * sector 0 is separated by one sector from logical sector 1. 150 * d_trackskew is the offset of sector 0 on track N relative to 151 * sector 0 on track N-1 on the same cylinder. Finally, d_cylskew 152 * is the offset of sector 0 on cylinder N relative to sector 0 153 * on cylinder N-1. 154 */ 155 u_int16_t d_rpm; /* rotational speed */ 156 u_int16_t d_interleave; /* hardware sector interleave */ 157 u_int16_t d_trackskew; /* sector 0 skew, per track */ 158 u_int16_t d_cylskew; /* sector 0 skew, per cylinder */ 159 u_int32_t d_headswitch; /* head switch time, usec */ 160 u_int32_t d_trkseek; /* track-to-track seek, usec */ 161 u_int32_t d_flags; /* generic flags (now unused) */ 162 #define NDDATA 5 163 u_int32_t d_drivedata[NDDATA]; /* drive-type specific information */ 164 #define NSPARE 5 165 u_int32_t d_spare[NSPARE]; /* reserved for future use */ 166 u_int32_t d_magic2; /* the magic number (again) */ 167 u_int16_t d_checksum; /* xor of data incl. partitions */ 168 169 /* filesystem and partition information: */ 170 u_int16_t d_npartitions; /* number of partitions in following */ 171 u_int32_t d_bbsize; /* size of boot area at sn0, bytes */ 172 u_int32_t d_sbsize; /* max size of fs superblock, bytes */ 173 struct partition { /* the partition table */ 174 u_int32_t p_size; /* number of sectors in partition */ 175 u_int32_t p_offset; /* starting sector */ 176 u_int32_t p_fsize; /* filesystem basic fragment size */ 177 u_int8_t p_fstype; /* filesystem type, see below */ 178 u_int8_t p_frag; /* filesystem fragments per block */ 179 union { 180 u_int16_t cpg; /* UFS: FS cylinders per group */ 181 u_int16_t sgs; /* LFS: FS segment shift */ 182 } __partition_u1; 183 #define p_cpg __partition_u1.cpg 184 #define p_sgs __partition_u1.sgs 185 } d_partitions[MAXPARTITIONS]; /* actually may be more */ 186 }; 187 188 static u_int16_t dkcksum(struct disklabel *lp); 189 190 static __inline u_int16_t 191 dkcksum(struct disklabel *lp) 192 { 193 u_int16_t *start, *end; 194 u_int16_t sum = 0; 195 196 start = (u_int16_t *)lp; 197 end = (u_int16_t *)&lp->d_partitions[lp->d_npartitions]; 198 while (start < end) 199 sum ^= *start++; 200 return (sum); 201 } 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 #define DTYPE_CCD 11 /* concatenated disk */ 227 #define DTYPE_VINUM 12 /* vinum volume */ 228 #define DTYPE_DOC2K 13 /* Msys DiskOnChip */ 229 230 #ifdef DKTYPENAMES 231 static const char *dktypenames[] = { 232 "unknown", 233 "SMD", 234 "MSCP", 235 "old DEC", 236 "SCSI", 237 "ESDI", 238 "ST506", 239 "HP-IB", 240 "HP-FL", 241 "type 9", 242 "floppy", 243 "CCD", 244 "Vinum", 245 "DOC2K", 246 NULL 247 }; 248 #define DKMAXTYPES (sizeof(dktypenames) / sizeof(dktypenames[0]) - 1) 249 #endif 250 251 /* 252 * Filesystem type and version. 253 * Used to interpret other filesystem-specific 254 * per-partition information. 255 */ 256 #define FS_UNUSED 0 /* unused */ 257 #define FS_SWAP 1 /* swap */ 258 #define FS_V6 2 /* Sixth Edition */ 259 #define FS_V7 3 /* Seventh Edition */ 260 #define FS_SYSV 4 /* System V */ 261 #define FS_V71K 5 /* V7 with 1K blocks (4.1, 2.9) */ 262 #define FS_V8 6 /* Eighth Edition, 4K blocks */ 263 #define FS_BSDFFS 7 /* 4.2BSD fast file system */ 264 #define FS_MSDOS 8 /* MSDOS file system */ 265 #define FS_BSDLFS 9 /* 4.4BSD log-structured file system */ 266 #define FS_OTHER 10 /* in use, but unknown/unsupported */ 267 #define FS_HPFS 11 /* OS/2 high-performance file system */ 268 #define FS_ISO9660 12 /* ISO 9660, normally CD-ROM */ 269 #define FS_BOOT 13 /* partition contains bootstrap */ 270 #define FS_VINUM 14 /* Vinum drive partition */ 271 #define FS_RAID 15 272 #define FS_RESERVED16 16 273 #define FS_RESERVED17 17 274 #define FS_RESERVED18 18 275 #define FS_CCD 19 /* CCD drive partition */ 276 #define FS_RESERVED20 20 277 #define FS_JFS2 21 278 279 #ifdef DKTYPENAMES 280 static const char *fstypenames[] = { 281 "unused", 282 "swap", 283 "Version 6", 284 "Version 7", 285 "System V", 286 "4.1BSD", 287 "Eighth Edition", 288 "4.2BSD", 289 "MSDOS", 290 "4.4LFS", 291 "unknown", 292 "HPFS", 293 "ISO9660", 294 "boot", 295 "vinum", 296 "raid", 297 "?", 298 "?", 299 "?", 300 "ccd", 301 "?", /* don't use in case freebsd reassigns jfs / bug in freebsd */ 302 "jfs", 303 NULL 304 }; 305 #define FSMAXTYPES (sizeof(fstypenames) / sizeof(fstypenames[0]) - 1) 306 #endif 307 308 #ifndef LOCORE 309 310 /* 311 * Disk-specific ioctls. 312 */ 313 #define DIOCGDINFO _IOR('d', 101, struct disklabel)/* get */ 314 #define DIOCSDINFO _IOW('d', 102, struct disklabel)/* set */ 315 #define DIOCWDINFO _IOW('d', 103, struct disklabel)/* set, update disk */ 316 #define DIOCGDVIRGIN _IOR('d', 105, struct disklabel) /* get virgin label */ 317 318 #define DIOCWLABEL _IOW('d', 109, int) /* write en/disable label */ 319 320 #ifdef _KERNEL 321 322 /* 323 * XXX encoding of disk minor numbers, should be elsewhere. 324 * 325 * See <sys/reboot.h> for a possibly better encoding. 326 * 327 * "cpio -H newc" can be used to back up device files with large minor 328 * numbers (but not ones >= 2^31). Old cpio formats and all tar formats 329 * don't have enough bits, and cpio and tar don't notice the lossage. 330 * There are also some sign extension bugs. 331 */ 332 333 /* 334 3 2 1 0 335 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 336 _________________________________________________________________ 337 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 338 ----------------------------------------------------------------- 339 | TYPE |UNIT_2 |P| SLICE | MAJOR? | UNIT |PART | 340 ----------------------------------------------------------------- 341 */ 342 343 #define DKMAXUNIT 0x1ff /* Highest disk unit number */ 344 345 #define dkmakeminor(unit, slice, part) \ 346 (((slice) << 16) | (((unit) & 0x1e0) << 16) | \ 347 (((unit) & 0x1f) << 3) | (part & 7) | \ 348 ((part & 0x08) << 17)) 349 350 static __inline u_int 351 dkunitmask(void) 352 { 353 return (0x01e000f8); 354 } 355 356 static __inline u_int 357 dkmakeunit(int unit) 358 { 359 return(dkmakeminor(unit, 0, 0)); 360 } 361 362 static __inline cdev_t 363 dkmodpart(cdev_t dev, int part) 364 { 365 int val; 366 367 if (part < 8) 368 val = (part & 7); 369 else 370 val = (part & 7) | 0x100000; 371 return (make_sub_dev(dev, (minor(dev) & ~0x100007) | val)); 372 } 373 374 static __inline cdev_t 375 dkmodslice(cdev_t dev, int slice) 376 { 377 return (make_sub_dev(dev, (minor(dev) & ~0x0f0000) | (slice << 16))); 378 } 379 380 static __inline int 381 dkpart(cdev_t dev) 382 { 383 return (((minor(dev) >> 17) & 0x08) | (minor(dev) & 7)); 384 } 385 386 #define dkslice(dev) ((minor(dev) >> 16) & 0x0f) 387 #define dktype(dev) ((minor(dev) >> 25) & 0x7f) 388 389 static __inline u_int 390 dkunit(cdev_t dev) 391 { 392 return (((minor(dev) >> 16) & 0x1e0) | ((minor(dev) >> 3) & 0x1f)); 393 } 394 395 struct buf; 396 struct bio; 397 struct bio_queue_head; 398 399 struct bio *bounds_check_with_label (cdev_t dev, struct bio *bio, 400 struct disklabel *lp, int wlabel); 401 void diskerr (struct bio *bio, cdev_t dev, const char *what, int pri, 402 int donecnt); 403 void disksort (struct buf *ap, struct buf *bp); 404 char *readdisklabel (cdev_t dev, struct disklabel *lp); 405 void bioqdisksort (struct bio_queue_head *ap, struct bio *bio); 406 int setdisklabel (struct disklabel *olp, struct disklabel *nlp, 407 u_long openmask); 408 int writedisklabel (cdev_t dev, struct disklabel *lp); 409 410 #endif /* _KERNEL */ 411 412 #endif /* LOCORE */ 413 414 #ifndef _KERNEL 415 __BEGIN_DECLS 416 struct disklabel *getdiskbyname (const char *); 417 __END_DECLS 418 #endif 419 420 #endif /* !_SYS_DISKLABEL_H_ */ 421