diskpc98.h revision 4027
1285SN/A/* 2821Saefimov * Copyright (c) 1987, 1988, 1993 3285SN/A * The Regents of the University of California. All rights reserved. 4285SN/A * 5285SN/A * Redistribution and use in source and binary forms, with or without 6285SN/A * modification, are permitted provided that the following conditions 7285SN/A * are met: 8285SN/A * 1. Redistributions of source code must retain the above copyright 9285SN/A * notice, this list of conditions and the following disclaimer. 10285SN/A * 2. Redistributions in binary form must reproduce the above copyright 11285SN/A * notice, this list of conditions and the following disclaimer in the 12285SN/A * documentation and/or other materials provided with the distribution. 13285SN/A * 3. All advertising materials mentioning features or use of this software 14285SN/A * must display the following acknowledgement: 15285SN/A * This product includes software developed by the University of 16285SN/A * California, Berkeley and its contributors. 17285SN/A * 4. Neither the name of the University nor the names of its contributors 18285SN/A * may be used to endorse or promote products derived from this software 19285SN/A * without specific prior written permission. 20285SN/A * 21285SN/A * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22285SN/A * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23285SN/A * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24285SN/A * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25285SN/A * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26285SN/A * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27285SN/A * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28285SN/A * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29285SN/A * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30285SN/A * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31285SN/A * SUCH DAMAGE. 32285SN/A * 33285SN/A * @(#)disklabel.h 8.1 (Berkeley) 6/2/93 34285SN/A * $Id: disklabel.h,v 1.6 1994/10/27 20:45:09 jkh Exp $ 35285SN/A */ 36285SN/A 37285SN/A#ifndef _SYS_DISKLABEL_H_ 38285SN/A#define _SYS_DISKLABEL_H_ 39285SN/A 40285SN/A/* 41285SN/A * Disk description table, see disktab(5) 42285SN/A */ 43285SN/A#define _PATH_DISKTAB "/etc/disktab" 44285SN/A#define DISKTAB "/etc/disktab" /* deprecated */ 45285SN/A 46285SN/A/* 47641Smkos * Each disk has a label which includes information about the hardware 48285SN/A * disk geometry, filesystem partitions, and drive specific information. 49285SN/A * The label is in block 0 or 1, possibly offset from the beginning 50285SN/A * to leave room for a bootstrap, etc. 51285SN/A */ 52285SN/A 53821Saefimov/* XXX these should be defined per controller (or drive) elsewhere, not here! */ 54285SN/A#ifdef __i386__ 55285SN/A#define LABELSECTOR 1 /* sector containing label */ 56641Smkos#define LABELOFFSET 0 /* offset of label in sector */ 57285SN/A#define OURPART 2 /* partition is 'all BSD' */ 58285SN/A#define RAWPART 3 /* partition is 'all device' */ 59285SN/A#define readMSPtolabel readMBRtolabel 60285SN/A#endif 61285SN/A 62285SN/A#ifndef readMSPtolabel 63285SN/A#define readMSPtolabel(a,b,c,d,e,) /* zap calls if irrelevant */ 64285SN/A#endif 65285SN/A 66285SN/A#ifdef tahoe 67285SN/A#define RAWPART 0 68285SN/A#endif 69285SN/A 70285SN/A#ifndef RAWPART 71285SN/A#define RAWPART 2 72285SN/A#endif 73285SN/A 74285SN/A#ifndef OURPART 75285SN/A#define OURPART RAWPART /* by default it's all ours */ 76821Saefimov#endif 77285SN/A 78285SN/A#ifndef LABELSECTOR 79285SN/A#define LABELSECTOR 0 /* sector containing label */ 80285SN/A#endif 81285SN/A 82285SN/A#ifndef LABELOFFSET 83285SN/A#define LABELOFFSET 64 /* offset of label in sector */ 84285SN/A#endif 85285SN/A 86285SN/A#define DISKMAGIC ((u_long) 0x82564557) /* The disk magic number */ 87285SN/A#ifndef MAXPARTITIONS 88285SN/A#define MAXPARTITIONS 8 89285SN/A#endif 90285SN/A 91285SN/A 92285SN/A#ifndef LOCORE 93285SN/Astruct disklabel { 94285SN/A u_long d_magic; /* the magic number */ 95285SN/A short d_type; /* drive type */ 96285SN/A short d_subtype; /* controller/d_type specific */ 97285SN/A char d_typename[16]; /* type name, e.g. "eagle" */ 98285SN/A /* 99285SN/A * d_packname contains the pack identifier and is returned when 100285SN/A * the disklabel is read off the disk or in-core copy. 101285SN/A * d_boot0 and d_boot1 are the (optional) names of the 102285SN/A * primary (block 0) and secondary (block 1-15) bootstraps 103285SN/A * as found in /usr/mdec. These are returned when using 104285SN/A * getdiskbyname(3) to retrieve the values from /etc/disktab. 105285SN/A */ 106285SN/A#if defined(KERNEL) || defined(STANDALONE) 107285SN/A char d_packname[16]; /* pack identifier */ 108285SN/A#else 109285SN/A union { 110285SN/A char un_d_packname[16]; /* pack identifier */ 111285SN/A struct { 112285SN/A char *un_d_boot0; /* primary bootstrap name */ 113285SN/A char *un_d_boot1; /* secondary bootstrap name */ 114285SN/A } un_b; 115285SN/A } d_un; 116285SN/A#define d_packname d_un.un_d_packname 117285SN/A#define d_boot0 d_un.un_b.un_d_boot0 118285SN/A#define d_boot1 d_un.un_b.un_d_boot1 119285SN/A#endif /* ! KERNEL or STANDALONE */ 120285SN/A /* disk geometry: */ 121285SN/A u_long d_secsize; /* # of bytes per sector */ 122285SN/A u_long d_nsectors; /* # of data sectors per track */ 123285SN/A u_long d_ntracks; /* # of tracks per cylinder */ 124285SN/A u_long d_ncylinders; /* # of data cylinders per unit */ 125285SN/A u_long d_secpercyl; /* # of data sectors per cylinder */ 126285SN/A u_long d_secperunit; /* # of data sectors per unit */ 127285SN/A /* 128285SN/A * Spares (bad sector replacements) below 129285SN/A * are not counted in d_nsectors or d_secpercyl. 130285SN/A * Spare sectors are assumed to be physical sectors 131285SN/A * which occupy space at the end of each track and/or cylinder. 132285SN/A */ 133641Smkos u_short d_sparespertrack; /* # of spare sectors per track */ 134285SN/A u_short d_sparespercyl; /* # of spare sectors per cylinder */ 135285SN/A /* 136285SN/A * Alternate cylinders include maintenance, replacement, 137285SN/A * configuration description areas, etc. 138285SN/A */ 139285SN/A u_long d_acylinders; /* # of alt. cylinders per unit */ 140285SN/A 141285SN/A /* hardware characteristics: */ 142285SN/A /* 143285SN/A * d_interleave, d_trackskew and d_cylskew describe perturbations 144285SN/A * in the media format used to compensate for a slow controller. 145285SN/A * Interleave is physical sector interleave, set up by the formatter 146285SN/A * or controller when formatting. When interleaving is in use, 147285SN/A * logically adjacent sectors are not physically contiguous, 148285SN/A * but instead are separated by some number of sectors. 149285SN/A * It is specified as the ratio of physical sectors traversed 150285SN/A * per logical sector. Thus an interleave of 1:1 implies contiguous 151285SN/A * layout, while 2:1 implies that logical sector 0 is separated 152285SN/A * by one sector from logical sector 1. 153285SN/A * d_trackskew is the offset of sector 0 on track N 154285SN/A * relative to sector 0 on track N-1 on the same cylinder. 155285SN/A * Finally, d_cylskew is the offset of sector 0 on cylinder N 156285SN/A * relative to sector 0 on cylinder N-1. 157285SN/A */ 158285SN/A u_short d_rpm; /* rotational speed */ 159285SN/A u_short d_interleave; /* hardware sector interleave */ 160285SN/A u_short d_trackskew; /* sector 0 skew, per track */ 161285SN/A u_short d_cylskew; /* sector 0 skew, per cylinder */ 162285SN/A u_long d_headswitch; /* head switch time, usec */ 163641Smkos u_long d_trkseek; /* track-to-track seek, usec */ 164285SN/A u_long d_flags; /* generic flags */ 165285SN/A#define NDDATA 5 166285SN/A u_long d_drivedata[NDDATA]; /* drive-type specific information */ 167285SN/A#define NSPARE 5 168285SN/A u_long d_spare[NSPARE]; /* reserved for future use */ 169285SN/A u_long d_magic2; /* the magic number (again) */ 170285SN/A u_short d_checksum; /* xor of data incl. partitions */ 171285SN/A 172285SN/A /* filesystem and partition information: */ 173285SN/A u_short d_npartitions; /* number of partitions in following */ 174821Saefimov u_long d_bbsize; /* size of boot area at sn0, bytes */ 175285SN/A u_long d_sbsize; /* max size of fs superblock, bytes */ 176285SN/A struct partition { /* the partition table */ 177285SN/A u_long p_size; /* number of sectors in partition */ 178285SN/A u_long p_offset; /* starting sector */ 179285SN/A u_long p_fsize; /* filesystem basic fragment size */ 180285SN/A u_char p_fstype; /* filesystem type, see below */ 181285SN/A u_char p_frag; /* filesystem fragments per block */ 182285SN/A union { 183285SN/A u_short cpg; /* UFS: FS cylinders per group */ 184285SN/A u_short sgs; /* LFS: FS segment shift */ 185285SN/A } __partition_u1; 186285SN/A#define p_cpg __partition_u1.cpg 187285SN/A#define p_sgs __partition_u1.sgs 188285SN/A } d_partitions[MAXPARTITIONS]; /* actually may be more */ 189285SN/A}; 190285SN/Astruct cpu_disklabel { 191285SN/A}; 192285SN/A#else /* LOCORE */ 193285SN/A /* 194641Smkos * offsets for asm boot files. 195641Smkos */ 196285SN/A .set d_secsize,40 197285SN/A .set d_nsectors,44 198641Smkos .set d_ntracks,48 199641Smkos .set d_ncylinders,52 200641Smkos .set d_secpercyl,56 201285SN/A .set d_secperunit,60 202285SN/A .set d_end_,276 /* size of disk label */ 203285SN/A#endif /* LOCORE */ 204285SN/A 205285SN/A/* d_type values: */ 206285SN/A#define DTYPE_SMD 1 /* SMD, XSMD; VAX hp/up */ 207285SN/A#define DTYPE_MSCP 2 /* MSCP */ 208285SN/A#define DTYPE_DEC 3 /* other DEC (rk, rl) */ 209285SN/A#define DTYPE_SCSI 4 /* SCSI */ 210285SN/A#define DTYPE_ESDI 5 /* ESDI interface */ 211285SN/A#define DTYPE_ST506 6 /* ST506 etc. */ 212285SN/A#define DTYPE_HPIB 7 /* CS/80 on HP-IB */ 213285SN/A#define DTYPE_HPFL 8 /* HP Fiber-link */ 214285SN/A#define DTYPE_FLOPPY 10 /* floppy */ 215285SN/A 216285SN/A/* d_subtype values: */ 217285SN/A#define DSTYPE_INDOSPART 0x8 /* is inside dos partition */ 218285SN/A#define DSTYPE_DOSPART(s) ((s) & 3) /* dos partition number */ 219285SN/A#define DSTYPE_GEOMETRY 0x10 /* drive params in label */ 220285SN/A 221285SN/A#ifdef DKTYPENAMES 222285SN/Astatic char *dktypenames[] = { 223285SN/A "unknown", 224285SN/A "SMD", 225285SN/A "MSCP", 226285SN/A "old DEC", 227285SN/A "SCSI", 228285SN/A "ESDI", 229285SN/A "ST506", 230367SN/A "HP-IB", 231367SN/A "HP-FL", 232285SN/A "type 9", 233285SN/A "floppy", 234285SN/A 0 235285SN/A}; 236821Saefimov#define DKMAXTYPES (sizeof(dktypenames) / sizeof(dktypenames[0]) - 1) 237285SN/A#endif 238285SN/A 239/* 240 * Filesystem type and version. 241 * Used to interpret other filesystem-specific 242 * per-partition information. 243 */ 244#define FS_UNUSED 0 /* unused */ 245#define FS_SWAP 1 /* swap */ 246#define FS_V6 2 /* Sixth Edition */ 247#define FS_V7 3 /* Seventh Edition */ 248#define FS_SYSV 4 /* System V */ 249#define FS_V71K 5 /* V7 with 1K blocks (4.1, 2.9) */ 250#define FS_V8 6 /* Eighth Edition, 4K blocks */ 251#define FS_BSDFFS 7 /* 4.2BSD fast file system */ 252#define FS_MSDOS 8 /* MSDOS file system */ 253#define FS_BSDLFS 9 /* 4.4BSD log-structured file system */ 254#define FS_OTHER 10 /* in use, but unknown/unsupported */ 255#define FS_HPFS 11 /* OS/2 high-performance file system */ 256#define FS_ISO9660 12 /* ISO 9660, normally CD-ROM */ 257#define FS_BOOT 13 /* partition contains bootstrap */ 258 259#ifdef DKTYPENAMES 260static char *fstypenames[] = { 261 "unused", 262 "swap", 263 "Version 6", 264 "Version 7", 265 "System V", 266 "4.1BSD", 267 "Eighth Edition", 268 "4.2BSD", 269 "MSDOS", 270 "4.4LFS", 271 "unknown", 272 "HPFS", 273 "ISO9660", 274 "boot", 275 0 276}; 277#define FSMAXTYPES (sizeof(fstypenames) / sizeof(fstypenames[0]) - 1) 278#endif 279 280/* 281 * flags shared by various drives: 282 */ 283#define D_REMOVABLE 0x01 /* removable media */ 284#define D_ECC 0x02 /* supports ECC */ 285#define D_BADSECT 0x04 /* supports bad sector forw. */ 286#define D_RAMDISK 0x08 /* disk emulator */ 287#define D_CHAIN 0x10 /* can do back-back transfers */ 288 289/* 290 * Drive data for SMD. 291 */ 292#define d_smdflags d_drivedata[0] 293#define D_SSE 0x1 /* supports skip sectoring */ 294#define d_mindist d_drivedata[1] 295#define d_maxdist d_drivedata[2] 296#define d_sdist d_drivedata[3] 297 298/* 299 * Drive data for ST506. 300 */ 301#define d_precompcyl d_drivedata[0] 302#define d_gap3 d_drivedata[1] /* used only when formatting */ 303 304/* 305 * Drive data for SCSI. 306 */ 307#define d_blind d_drivedata[0] 308 309#ifndef LOCORE 310/* 311 * Structure used to perform a format 312 * or other raw operation, returning data 313 * and/or register values. 314 * Register identification and format 315 * are device- and driver-dependent. 316 */ 317struct format_op { 318 char *df_buf; 319 int df_count; /* value-result */ 320 daddr_t df_startblk; 321 int df_reg[8]; /* result */ 322}; 323 324/* 325 * Structure used internally to retrieve 326 * information about a partition on a disk. 327 */ 328struct partinfo { 329 struct disklabel *disklab; 330 struct partition *part; 331}; 332 333/* DOS partition table -- located in boot block */ 334 335#define DOSBBSECTOR 0 /* DOS boot block relative sector number */ 336#define DOSPARTOFF 446 337#define NDOSPART 4 338#define DOSPTYP_386BSD 0xa5 /* 386BSD partition type */ 339#define MBR_PTYPE_FreeBSD 0xa5 /* FreeBSD partition type */ 340 341struct dos_partition { 342 unsigned char dp_flag; /* bootstrap flags */ 343 unsigned char dp_shd; /* starting head */ 344 unsigned char dp_ssect; /* starting sector */ 345 unsigned char dp_scyl; /* starting cylinder */ 346 unsigned char dp_typ; /* partition type */ 347 unsigned char dp_ehd; /* end head */ 348 unsigned char dp_esect; /* end sector */ 349 unsigned char dp_ecyl; /* end cylinder */ 350 unsigned long dp_start; /* absolute starting sector number */ 351 unsigned long dp_size; /* partition size in sectors */ 352}; 353 354extern struct dos_partition dos_partitions[NDOSPART]; 355 356#define DPSECT(s) ((s) & 0x3f) /* isolate relevant bits of sector */ 357#define DPCYL(c, s) ((c) + (((s) & 0xc0)<<2)) /* and those that are cylinder */ 358 359/* 360 * Disk-specific ioctls. 361 */ 362 /* get and set disklabel; DIOCGPART used internally */ 363#define DIOCGDINFO _IOR('d', 101, struct disklabel)/* get */ 364#define DIOCSDINFO _IOW('d', 102, struct disklabel)/* set */ 365#define DIOCWDINFO _IOW('d', 103, struct disklabel)/* set, update disk */ 366#define DIOCGPART _IOW('d', 104, struct partinfo) /* get partition */ 367 368/* do format operation, read or write */ 369#define DIOCRFORMAT _IOWR('d', 105, struct format_op) 370#define DIOCWFORMAT _IOWR('d', 106, struct format_op) 371 372#define DIOCSSTEP _IOW('d', 107, int) /* set step rate */ 373#define DIOCSRETRIES _IOW('d', 108, int) /* set # of retries */ 374#define DIOCWLABEL _IOW('d', 109, int) /* write en/disable label */ 375 376#define DIOCSBAD _IOW('d', 110, struct dkbad) /* set kernel dkbad */ 377 378#endif /* LOCORE */ 379 380#ifdef KERNEL 381u_int dkcksum __P((struct disklabel *)); 382int writedisklabel __P((dev_t dev, void (*strat)(), struct disklabel *lp)); 383char * readdisklabel __P((dev_t dev, void (*strat)(), struct disklabel *lp, struct dos_partition *dp, struct dkbad *bdp)); 384int setdisklabel __P((struct disklabel *olp, struct disklabel *nlp, u_long openmask)); 385void disksort __P((struct buf *ap, struct buf *bp)); 386void diskerr __P((struct buf *, char *, char *, int, int, struct disklabel *)); 387#ifdef __i386 388char * readMBRtolabel __P(( dev_t dev , void (*strat)(), register struct disklabel *lp, struct dos_partition *dp, int *cyl)); 389#endif 390#endif 391 392#if !defined(KERNEL) && !defined(LOCORE) 393 394#include <sys/cdefs.h> 395 396__BEGIN_DECLS 397struct disklabel *getdiskbyname __P((const char *)); 398__END_DECLS 399 400#endif 401 402#ifdef __i386 403/* encoding of disk minor numbers, should be elsewhere... */ 404#define dkunit(dev) (minor(dev) >> 3) 405#define dkpart(dev) (minor(dev) & 07) 406#define dkminor(unit, part) (((unit) << 3) | (part)) 407#endif 408 409#endif 410 411 412