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/disklabel32.h,v 1.7 2004/06/02 19:31:02 dillon Exp $ 36 */ 37 38 #ifndef _SYS_DISKLABEL_H_ 39 #define _SYS_DISKLABEL_H_ 40 41 #ifndef _KERNEL 42 #include <sys/types.h> 43 #endif 44 #include <sys/ioccom.h> 45 #include <sys/conf.h> 46 47 /* 48 * Disk description table, see disktab(5) 49 */ 50 #define _PATH_DISKTAB "/etc/disktab" 51 #define DISKTAB "/etc/disktab" /* deprecated */ 52 53 /* 54 * Each disk has a label which includes information about the hardware 55 * disk geometry, filesystem partitions, and drive specific information. 56 * The label is in block 0 or 1, possibly offset from the beginning 57 * to leave room for a bootstrap, etc. 58 */ 59 60 /* XXX these should be defined per controller (or drive) elsewhere, not here! */ 61 #ifdef __i386__ 62 #define LABELSECTOR 1 /* sector containing label */ 63 #define LABELOFFSET 0 /* offset of label in sector */ 64 #endif 65 66 #ifdef __alpha__ 67 #define LABELSECTOR 0 68 #define LABELOFFSET 64 69 #endif 70 71 #ifndef LABELSECTOR 72 #define LABELSECTOR 0 /* sector containing label */ 73 #endif 74 75 #ifndef LABELOFFSET 76 #define LABELOFFSET 64 /* offset of label in sector */ 77 #endif 78 79 #define DISKMAGIC ((u_int32_t)0x82564557) /* The disk magic number */ 80 #ifndef MAXPARTITIONS 81 #define MAXPARTITIONS 16 82 #endif 83 84 #define LABEL_PART 2 /* partition containing label */ 85 #define RAW_PART 2 /* partition containing whole disk */ 86 #define SWAP_PART 1 /* partition normally containing swap */ 87 88 #ifndef LOCORE 89 struct disklabel { 90 u_int32_t d_magic; /* the magic number */ 91 u_int16_t d_type; /* drive type */ 92 u_int16_t d_subtype; /* controller/d_type specific */ 93 char d_typename[16]; /* type name, e.g. "eagle" */ 94 95 /* 96 * d_packname contains the pack identifier and is returned when 97 * the disklabel is read off the disk or in-core copy. 98 * d_boot0 and d_boot1 are the (optional) names of the 99 * primary (block 0) and secondary (block 1-15) bootstraps 100 * as found in /boot. These are returned when using 101 * getdiskbyname(3) to retrieve the values from /etc/disktab. 102 */ 103 union { 104 char un_d_packname[16]; /* pack identifier */ 105 struct { 106 char *un_d_boot0; /* primary bootstrap name */ 107 char *un_d_boot1; /* secondary bootstrap name */ 108 } un_b; 109 } d_un; 110 #define d_packname d_un.un_d_packname 111 #define d_boot0 d_un.un_b.un_d_boot0 112 #define d_boot1 d_un.un_b.un_d_boot1 113 114 /* disk geometry: */ 115 u_int32_t d_secsize; /* # of bytes per sector */ 116 u_int32_t d_nsectors; /* # of data sectors per track */ 117 u_int32_t d_ntracks; /* # of tracks per cylinder */ 118 u_int32_t d_ncylinders; /* # of data cylinders per unit */ 119 u_int32_t d_secpercyl; /* # of data sectors per cylinder */ 120 u_int32_t d_secperunit; /* # of data sectors per unit */ 121 122 /* 123 * Spares (bad sector replacements) below are not counted in 124 * d_nsectors or d_secpercyl. Spare sectors are assumed to 125 * be physical sectors which occupy space at the end of each 126 * track and/or cylinder. 127 */ 128 u_int16_t d_sparespertrack; /* # of spare sectors per track */ 129 u_int16_t d_sparespercyl; /* # of spare sectors per cylinder */ 130 /* 131 * Alternate cylinders include maintenance, replacement, configuration 132 * description areas, etc. 133 */ 134 u_int32_t d_acylinders; /* # of alt. cylinders per unit */ 135 136 /* hardware characteristics: */ 137 /* 138 * d_interleave, d_trackskew and d_cylskew describe perturbations 139 * in the media format used to compensate for a slow controller. 140 * Interleave is physical sector interleave, set up by the 141 * formatter or controller when formatting. When interleaving is 142 * in use, logically adjacent sectors are not physically 143 * contiguous, but instead are separated by some number of 144 * sectors. It is specified as the ratio of physical sectors 145 * traversed per logical sector. Thus an interleave of 1:1 146 * implies contiguous layout, while 2:1 implies that logical 147 * sector 0 is separated by one sector from logical sector 1. 148 * d_trackskew is the offset of sector 0 on track N relative to 149 * sector 0 on track N-1 on the same cylinder. Finally, d_cylskew 150 * is the offset of sector 0 on cylinder N relative to sector 0 151 * on cylinder N-1. 152 */ 153 u_int16_t d_rpm; /* rotational speed */ 154 u_int16_t d_interleave; /* hardware sector interleave */ 155 u_int16_t d_trackskew; /* sector 0 skew, per track */ 156 u_int16_t d_cylskew; /* sector 0 skew, per cylinder */ 157 u_int32_t d_headswitch; /* head switch time, usec */ 158 u_int32_t d_trkseek; /* track-to-track seek, usec */ 159 u_int32_t d_flags; /* generic flags */ 160 #define NDDATA 5 161 u_int32_t d_drivedata[NDDATA]; /* drive-type specific information */ 162 #define NSPARE 5 163 u_int32_t d_spare[NSPARE]; /* reserved for future use */ 164 u_int32_t d_magic2; /* the magic number (again) */ 165 u_int16_t d_checksum; /* xor of data incl. partitions */ 166 167 /* filesystem and partition information: */ 168 u_int16_t d_npartitions; /* number of partitions in following */ 169 u_int32_t d_bbsize; /* size of boot area at sn0, bytes */ 170 u_int32_t d_sbsize; /* max size of fs superblock, bytes */ 171 struct partition { /* the partition table */ 172 u_int32_t p_size; /* number of sectors in partition */ 173 u_int32_t p_offset; /* starting sector */ 174 u_int32_t p_fsize; /* filesystem basic fragment size */ 175 u_int8_t p_fstype; /* filesystem type, see below */ 176 u_int8_t p_frag; /* filesystem fragments per block */ 177 union { 178 u_int16_t cpg; /* UFS: FS cylinders per group */ 179 u_int16_t sgs; /* LFS: FS segment shift */ 180 } __partition_u1; 181 #define p_cpg __partition_u1.cpg 182 #define p_sgs __partition_u1.sgs 183 } d_partitions[MAXPARTITIONS]; /* actually may be more */ 184 }; 185 186 static u_int16_t dkcksum(struct disklabel *lp); 187 188 static __inline u_int16_t 189 dkcksum(struct disklabel *lp) 190 { 191 u_int16_t *start, *end; 192 u_int16_t sum = 0; 193 194 start = (u_int16_t *)lp; 195 end = (u_int16_t *)&lp->d_partitions[lp->d_npartitions]; 196 while (start < end) 197 sum ^= *start++; 198 return (sum); 199 } 200 201 #else /* LOCORE */ 202 /* 203 * offsets for asm boot files. 204 */ 205 .set d_secsize,40 206 .set d_nsectors,44 207 .set d_ntracks,48 208 .set d_ncylinders,52 209 .set d_secpercyl,56 210 .set d_secperunit,60 211 .set d_end_,276 /* size of disk label */ 212 #endif /* LOCORE */ 213 214 /* d_type values: */ 215 #define DTYPE_SMD 1 /* SMD, XSMD; VAX hp/up */ 216 #define DTYPE_MSCP 2 /* MSCP */ 217 #define DTYPE_DEC 3 /* other DEC (rk, rl) */ 218 #define DTYPE_SCSI 4 /* SCSI */ 219 #define DTYPE_ESDI 5 /* ESDI interface */ 220 #define DTYPE_ST506 6 /* ST506 etc. */ 221 #define DTYPE_HPIB 7 /* CS/80 on HP-IB */ 222 #define DTYPE_HPFL 8 /* HP Fiber-link */ 223 #define DTYPE_FLOPPY 10 /* floppy */ 224 #define DTYPE_CCD 11 /* concatenated disk */ 225 #define DTYPE_VINUM 12 /* vinum volume */ 226 #define DTYPE_DOC2K 13 /* Msys DiskOnChip */ 227 228 #if defined(PC98) && !defined(PC98_ATCOMPAT) 229 #define DSTYPE_SEC256 0x80 /* physical sector size=256 */ 230 #endif 231 232 #ifdef DKTYPENAMES 233 static char *dktypenames[] = { 234 "unknown", 235 "SMD", 236 "MSCP", 237 "old DEC", 238 "SCSI", 239 "ESDI", 240 "ST506", 241 "HP-IB", 242 "HP-FL", 243 "type 9", 244 "floppy", 245 "CCD", 246 "Vinum", 247 "DOC2K", 248 NULL 249 }; 250 #define DKMAXTYPES (sizeof(dktypenames) / sizeof(dktypenames[0]) - 1) 251 #endif 252 253 /* 254 * Filesystem type and version. 255 * Used to interpret other filesystem-specific 256 * per-partition information. 257 */ 258 #define FS_UNUSED 0 /* unused */ 259 #define FS_SWAP 1 /* swap */ 260 #define FS_V6 2 /* Sixth Edition */ 261 #define FS_V7 3 /* Seventh Edition */ 262 #define FS_SYSV 4 /* System V */ 263 #define FS_V71K 5 /* V7 with 1K blocks (4.1, 2.9) */ 264 #define FS_V8 6 /* Eighth Edition, 4K blocks */ 265 #define FS_BSDFFS 7 /* 4.2BSD fast file system */ 266 #define FS_MSDOS 8 /* MSDOS file system */ 267 #define FS_BSDLFS 9 /* 4.4BSD log-structured file system */ 268 #define FS_OTHER 10 /* in use, but unknown/unsupported */ 269 #define FS_HPFS 11 /* OS/2 high-performance file system */ 270 #define FS_ISO9660 12 /* ISO 9660, normally CD-ROM */ 271 #define FS_BOOT 13 /* partition contains bootstrap */ 272 #define FS_VINUM 14 /* Vinum drive */ 273 274 #ifdef DKTYPENAMES 275 static char *fstypenames[] = { 276 "unused", 277 "swap", 278 "Version 6", 279 "Version 7", 280 "System V", 281 "4.1BSD", 282 "Eighth Edition", 283 "4.2BSD", 284 "MSDOS", 285 "4.4LFS", 286 "unknown", 287 "HPFS", 288 "ISO9660", 289 "boot", 290 "vinum", 291 NULL 292 }; 293 #define FSMAXTYPES (sizeof(fstypenames) / sizeof(fstypenames[0]) - 1) 294 #endif 295 296 /* 297 * flags shared by various drives: 298 */ 299 #define D_REMOVABLE 0x01 /* removable media */ 300 #define D_ECC 0x02 /* supports ECC */ 301 #define D_BADSECT 0x04 /* supports bad sector forw. */ 302 #define D_RAMDISK 0x08 /* disk emulator */ 303 #define D_CHAIN 0x10 /* can do back-back transfers */ 304 305 /* 306 * Drive data for SMD. 307 */ 308 #define d_smdflags d_drivedata[0] 309 #define D_SSE 0x1 /* supports skip sectoring */ 310 #define d_mindist d_drivedata[1] 311 #define d_maxdist d_drivedata[2] 312 #define d_sdist d_drivedata[3] 313 314 /* 315 * Drive data for ST506. 316 */ 317 #define d_precompcyl d_drivedata[0] 318 #define d_gap3 d_drivedata[1] /* used only when formatting */ 319 320 /* 321 * Drive data for SCSI. 322 */ 323 #define d_blind d_drivedata[0] 324 325 #ifndef LOCORE 326 /* 327 * Structure used to perform a format or other raw operation, returning 328 * data and/or register values. Register identification and format 329 * are device- and driver-dependent. 330 */ 331 struct format_op { 332 char *df_buf; 333 int df_count; /* value-result */ 334 daddr_t df_startblk; 335 int df_reg[8]; /* result */ 336 }; 337 338 /* 339 * Structure used internally to retrieve information about a partition 340 * on a disk. 341 */ 342 struct partinfo { 343 struct disklabel *disklab; 344 struct partition *part; 345 }; 346 347 /* 348 * Disk-specific ioctls. 349 */ 350 /* get and set disklabel; DIOCGPART used internally */ 351 #define DIOCGDINFO _IOR('d', 101, struct disklabel)/* get */ 352 #define DIOCSDINFO _IOW('d', 102, struct disklabel)/* set */ 353 #define DIOCWDINFO _IOW('d', 103, struct disklabel)/* set, update disk */ 354 #define DIOCGPART _IOW('d', 104, struct partinfo) /* get partition */ 355 #define DIOCGDVIRGIN _IOR('d', 105, struct disklabel) /* get virgin label */ 356 357 #define DIOCWLABEL _IOW('d', 109, int) /* write en/disable label */ 358 359 #ifdef _KERNEL 360 361 /* 362 * XXX encoding of disk minor numbers, should be elsewhere. 363 * 364 * See <sys/reboot.h> for a possibly better encoding. 365 * 366 * "cpio -H newc" can be used to back up device files with large minor 367 * numbers (but not ones >= 2^31). Old cpio formats and all tar formats 368 * don't have enough bits, and cpio and tar don't notice the lossage. 369 * There are also some sign extension bugs. 370 */ 371 372 /* 373 3 2 1 0 374 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 0 375 _________________________________________________________________ 376 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 377 ----------------------------------------------------------------- 378 | TYPE |UNIT_2 |P| SLICE | MAJOR? | UNIT |PART | 379 ----------------------------------------------------------------- 380 */ 381 382 #define DKMAXUNIT 0x1ff /* Highest disk unit number */ 383 384 #define dkmakeminor(unit, slice, part) \ 385 (((slice) << 16) | (((unit) & 0x1e0) << 16) | \ 386 (((unit) & 0x1f) << 3) | (part & 7) | \ 387 ((part & 0x08) << 17)) 388 389 static __inline u_int 390 dkunitmask(void) 391 { 392 return (0x01e000f8); 393 } 394 395 static __inline u_int 396 dkmakeunit(int unit) 397 { 398 return(dkmakeminor(unit, 0, 0)); 399 } 400 401 static __inline dev_t 402 dkmodpart(dev_t dev, int part) 403 { 404 int val; 405 406 if (part < 8) 407 val = (part & 7); 408 else 409 val = (part & 7) | 0x100000; 410 return (make_sub_dev(dev, (minor(dev) & ~0x100007) | val)); 411 } 412 413 static __inline dev_t 414 dkmodslice(dev_t dev, int slice) 415 { 416 return (make_sub_dev(dev, (minor(dev) & ~0x0f0000) | (slice << 16))); 417 } 418 419 static __inline int 420 dkpart(dev_t dev) 421 { 422 return (((minor(dev) >> 17) & 0x08) | (minor(dev) & 7)); 423 } 424 425 #define dkslice(dev) ((minor(dev) >> 16) & 0x0f) 426 #define dktype(dev) ((minor(dev) >> 25) & 0x7f) 427 428 static __inline u_int 429 dkunit(dev_t dev) 430 { 431 return (((minor(dev) >> 16) & 0x1e0) | ((minor(dev) >> 3) & 0x1f)); 432 } 433 434 struct buf; 435 struct buf_queue_head; 436 437 int bounds_check_with_label (struct buf *bp, struct disklabel *lp, 438 int wlabel); 439 void diskerr (struct buf *bp, dev_t dev, char *what, int pri, int blkdone, 440 struct disklabel *lp); 441 void disksort (struct buf *ap, struct buf *bp); 442 char *readdisklabel (dev_t dev, struct disklabel *lp); 443 void bufqdisksort (struct buf_queue_head *ap, struct buf *bp); 444 int setdisklabel (struct disklabel *olp, struct disklabel *nlp, 445 u_long openmask); 446 int writedisklabel (dev_t dev, struct disklabel *lp); 447 #ifdef __alpha__ 448 void alpha_fix_srm_checksum (struct buf *bp); 449 #endif 450 451 #endif /* _KERNEL */ 452 453 #endif /* LOCORE */ 454 455 #ifndef _KERNEL 456 __BEGIN_DECLS 457 struct disklabel *getdiskbyname (const char *); 458 __END_DECLS 459 #endif 460 461 #endif /* !_SYS_DISKLABEL_H_ */ 462