aboutsummaryrefslogtreecommitdiff
path: root/sys/sys/diskpc98.h
blob: 3f8e4bceb76a6306d97393cc889c6db587278d1c (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
/*
 * Copyright (c) 1987, 1988, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)disklabel.h	8.2 (Berkeley) 7/10/94
 * $Id: disklabel.h,v 1.22 1996/06/14 11:02:27 asami Exp $
 */

#ifndef _SYS_DISKLABEL_H_
#define	_SYS_DISKLABEL_H_

#include <sys/ioccom.h>

/*
 * Disk description table, see disktab(5)
 */
#define	_PATH_DISKTAB	"/etc/disktab"
#define	DISKTAB		"/etc/disktab"		/* deprecated */

/*
 * Each disk has a label which includes information about the hardware
 * disk geometry, filesystem partitions, and drive specific information.
 * The label is in block 0 or 1, possibly offset from the beginning
 * to leave room for a bootstrap, etc.
 */

/* XXX these should be defined per controller (or drive) elsewhere, not here! */
#ifdef __i386__
#define LABELSECTOR	1			/* sector containing label */
#define LABELOFFSET	0			/* offset of label in sector */
#endif

#ifndef	LABELSECTOR
#define LABELSECTOR	0			/* sector containing label */
#endif

#ifndef	LABELOFFSET
#define LABELOFFSET	64			/* offset of label in sector */
#endif

#define DISKMAGIC	((u_int32_t)0x82564557)	/* The disk magic number */
#ifndef MAXPARTITIONS
#define	MAXPARTITIONS	8
#endif

#define	LABEL_PART	2		/* partition containing label */
#define	RAW_PART	2		/* partition containing whole disk */
#define	SWAP_PART	1		/* partition normally containing swap */

#ifndef LOCORE
struct disklabel {
	u_int32_t d_magic;		/* the magic number */
	u_int16_t d_type;		/* drive type */
	u_int16_t d_subtype;		/* controller/d_type specific */
	char	  d_typename[16];	/* type name, e.g. "eagle" */

	/* 
	 * d_packname contains the pack identifier and is returned when
	 * the disklabel is read off the disk or in-core copy.
	 * d_boot0 and d_boot1 are the (optional) names of the
	 * primary (block 0) and secondary (block 1-15) bootstraps
	 * as found in /usr/mdec.  These are returned when using
	 * getdiskbyname(3) to retrieve the values from /etc/disktab.
	 */
#if defined(KERNEL) || defined(STANDALONE)
	char	  d_packname[16];		/* pack identifier */ 
#else
	union {
		char	un_d_packname[16];	/* pack identifier */
		struct {
			char *un_d_boot0;	/* primary bootstrap name */
			char *un_d_boot1;	/* secondary bootstrap name */
		} un_b;
	} d_un;
#define d_packname	d_un.un_d_packname
#define d_boot0		d_un.un_b.un_d_boot0
#define d_boot1		d_un.un_b.un_d_boot1
#endif	/* ! KERNEL or STANDALONE */

			/* disk geometry: */
	u_int32_t d_secsize;		/* # of bytes per sector */
	u_int32_t d_nsectors;		/* # of data sectors per track */
	u_int32_t d_ntracks;		/* # of tracks per cylinder */
	u_int32_t d_ncylinders;		/* # of data cylinders per unit */
	u_int32_t d_secpercyl;		/* # of data sectors per cylinder */
	u_int32_t d_secperunit;		/* # of data sectors per unit */

	/*
	 * Spares (bad sector replacements) below are not counted in
	 * d_nsectors or d_secpercyl.  Spare sectors are assumed to
	 * be physical sectors which occupy space at the end of each
	 * track and/or cylinder.
	 */
	u_int16_t d_sparespertrack;	/* # of spare sectors per track */
	u_int16_t d_sparespercyl;	/* # of spare sectors per cylinder */
	/*
	 * Alternate cylinders include maintenance, replacement, configuration
	 * description areas, etc.
	 */
	u_int32_t d_acylinders;		/* # of alt. cylinders per unit */

			/* hardware characteristics: */
	/*
	 * d_interleave, d_trackskew and d_cylskew describe perturbations
	 * in the media format used to compensate for a slow controller.
	 * Interleave is physical sector interleave, set up by the
	 * formatter or controller when formatting.  When interleaving is
	 * in use, logically adjacent sectors are not physically
	 * contiguous, but instead are separated by some number of
	 * sectors.  It is specified as the ratio of physical sectors
	 * traversed per logical sector.  Thus an interleave of 1:1
	 * implies contiguous layout, while 2:1 implies that logical
	 * sector 0 is separated by one sector from logical sector 1.
	 * d_trackskew is the offset of sector 0 on track N relative to
	 * sector 0 on track N-1 on the same cylinder.  Finally, d_cylskew
	 * is the offset of sector 0 on cylinder N relative to sector 0
	 * on cylinder N-1.
	 */
	u_int16_t d_rpm;		/* rotational speed */
	u_int16_t d_interleave;		/* hardware sector interleave */
	u_int16_t d_trackskew;		/* sector 0 skew, per track */
	u_int16_t d_cylskew;		/* sector 0 skew, per cylinder */
	u_int32_t d_headswitch;		/* head switch time, usec */
	u_int32_t d_trkseek;		/* track-to-track seek, usec */
	u_int32_t d_flags;		/* generic flags */
#define NDDATA 5
	u_int32_t d_drivedata[NDDATA];	/* drive-type specific information */
#define NSPARE 5
	u_int32_t d_spare[NSPARE];	/* reserved for future use */
	u_int32_t d_magic2;		/* the magic number (again) */
	u_int16_t d_checksum;		/* xor of data incl. partitions */

			/* filesystem and partition information: */
	u_int16_t d_npartitions;	/* number of partitions in following */
	u_int32_t d_bbsize;		/* size of boot area at sn0, bytes */
	u_int32_t d_sbsize;		/* max size of fs superblock, bytes */
	struct	partition {		/* the partition table */
		u_int32_t p_size;	/* number of sectors in partition */
		u_int32_t p_offset;	/* starting sector */
		u_int32_t p_fsize;	/* filesystem basic fragment size */
		u_int8_t p_fstype;	/* filesystem type, see below */
		u_int8_t p_frag;	/* filesystem fragments per block */
		union {
			u_int16_t cpg;	/* UFS: FS cylinders per group */
			u_int16_t sgs;	/* LFS: FS segment shift */
		} __partition_u1;
#define	p_cpg	__partition_u1.cpg
#define	p_sgs	__partition_u1.sgs
	} d_partitions[MAXPARTITIONS];	/* actually may be more */
};
#else /* LOCORE */
	/*
	 * offsets for asm boot files.
	 */
	.set	d_secsize,40
	.set	d_nsectors,44
	.set	d_ntracks,48
	.set	d_ncylinders,52
	.set	d_secpercyl,56
	.set	d_secperunit,60
	.set	d_end_,276		/* size of disk label */
#endif /* LOCORE */

/* d_type values: */
#define	DTYPE_SMD		1		/* SMD, XSMD; VAX hp/up */
#define	DTYPE_MSCP		2		/* MSCP */
#define	DTYPE_DEC		3		/* other DEC (rk, rl) */
#define	DTYPE_SCSI		4		/* SCSI */
#define	DTYPE_ESDI		5		/* ESDI interface */
#define	DTYPE_ST506		6		/* ST506 etc. */
#define	DTYPE_HPIB		7		/* CS/80 on HP-IB */
#define	DTYPE_HPFL		8		/* HP Fiber-link */
#define	DTYPE_FLOPPY		10		/* floppy */
#define	DTYPE_CCD		11		/* concatenated disk */

#ifdef PC98
#define DSTYPE_SEC256		0x80		/* physical sector size=256*/
#endif

#ifdef DKTYPENAMES
static char *dktypenames[] = {
	"unknown",
	"SMD",
	"MSCP",
	"old DEC",
	"SCSI",
	"ESDI",
	"ST506",
	"HP-IB",
	"HP-FL",
	"type 9",
	"floppy",
	"CCD",
	NULL
};
#define DKMAXTYPES	(sizeof(dktypenames) / sizeof(dktypenames[0]) - 1)
#endif

/*
 * Filesystem type and version.
 * Used to interpret other filesystem-specific
 * per-partition information.
 */
#define	FS_UNUSED	0		/* unused */
#define	FS_SWAP		1		/* swap */
#define	FS_V6		2		/* Sixth Edition */
#define	FS_V7		3		/* Seventh Edition */
#define	FS_SYSV		4		/* System V */
#define	FS_V71K		5		/* V7 with 1K blocks (4.1, 2.9) */
#define	FS_V8		6		/* Eighth Edition, 4K blocks */
#define	FS_BSDFFS	7		/* 4.2BSD fast file system */
#define	FS_MSDOS	8		/* MSDOS file system */
#define	FS_BSDLFS	9		/* 4.4BSD log-structured file system */
#define	FS_OTHER	10		/* in use, but unknown/unsupported */
#define	FS_HPFS		11		/* OS/2 high-performance file system */
#define	FS_ISO9660	12		/* ISO 9660, normally CD-ROM */
#define	FS_BOOT		13		/* partition contains bootstrap */

#ifdef	DKTYPENAMES
static char *fstypenames[] = {
	"unused",
	"swap",
	"Version 6",
	"Version 7",
	"System V",
	"4.1BSD",
	"Eighth Edition",
	"4.2BSD",
	"MSDOS",
	"4.4LFS",
	"unknown",
	"HPFS",
	"ISO9660",
	"boot",
	NULL
};
#define FSMAXTYPES	(sizeof(fstypenames) / sizeof(fstypenames[0]) - 1)
#endif

/*
 * flags shared by various drives:
 */
#define		D_REMOVABLE	0x01		/* removable media */
#define		D_ECC		0x02		/* supports ECC */
#define		D_BADSECT	0x04		/* supports bad sector forw. */
#define		D_RAMDISK	0x08		/* disk emulator */
#define		D_CHAIN		0x10		/* can do back-back transfers */

/*
 * Drive data for SMD.
 */
#define	d_smdflags	d_drivedata[0]
#define		D_SSE		0x1		/* supports skip sectoring */
#define	d_mindist	d_drivedata[1]
#define	d_maxdist	d_drivedata[2]
#define	d_sdist		d_drivedata[3]

/*
 * Drive data for ST506.
 */
#define d_precompcyl	d_drivedata[0]
#define d_gap3		d_drivedata[1]		/* used only when formatting */

/*
 * Drive data for SCSI.
 */
#define	d_blind		d_drivedata[0]

#ifndef LOCORE
/*
 * Structure used to perform a format or other raw operation, returning
 * data and/or register values.  Register identification and format
 * are device- and driver-dependent.
 */
struct format_op {
	char	*df_buf;
	int	df_count;		/* value-result */
	daddr_t	df_startblk;
	int	df_reg[8];		/* result */
};

/*
 * Structure used internally to retrieve information about a partition
 * on a disk.
 */
struct partinfo {
	struct disklabel *disklab;
	struct partition *part;
};

/* DOS partition table -- located in boot block */

#ifdef PC98
#define	DOSBBSECTOR	0	/* DOS boot block relative sector number */
#define DOSLABELSECTOR	1	/* 0: 256b/s, 1: 512b/s */
#define	DOSPARTOFF	0
#define NDOSPART	16
#define	DOSPTYP_386BSD	0x94	/* 386BSD partition type */
#define	MBR_PTYPE_FreeBSD 0x94	/* FreeBSD partition type */

struct dos_partition {
    	unsigned char	dp_mid;
#define DOSMID_386BSD		(0x14|0x80) /* 386bsd|bootable */
	unsigned char	dp_sid;
#define DOSSID_386BSD		(0x44|0x80) /* 386bsd|active */	
	unsigned char	dp_dum1;
	unsigned char	dp_dum2;
	unsigned char	dp_ipl_sct;
	unsigned char	dp_ipl_head;
	unsigned short	dp_ipl_cyl;
	unsigned char	dp_ssect;	/* starting sector */
	unsigned char	dp_shd;		/* starting head */
	unsigned short	dp_scyl;	/* starting cylinder */
	unsigned char	dp_esect;	/* end sector */
	unsigned char	dp_ehd;		/* end head */
	unsigned short	dp_ecyl;	/* end cylinder */
	unsigned char	dp_name[16];
};

#else /* IBMPC */
#define DOSBBSECTOR	0	/* DOS boot block relative sector number */
#define DOSPARTOFF	446
#define NDOSPART	4
#define	DOSPTYP_386BSD	0xa5	/* 386BSD partition type */

struct dos_partition {
	unsigned char	dp_flag;	/* bootstrap flags */
	unsigned char	dp_shd;		/* starting head */
	unsigned char	dp_ssect;	/* starting sector */
	unsigned char	dp_scyl;	/* starting cylinder */
	unsigned char	dp_typ;		/* partition type */
	unsigned char	dp_ehd;		/* end head */
	unsigned char	dp_esect;	/* end sector */
	unsigned char	dp_ecyl;	/* end cylinder */
	unsigned long	dp_start;	/* absolute starting sector number */
	unsigned long	dp_size;	/* partition size in sectors */
};
#endif

#define DPSECT(s) ((s) & 0x3f)		/* isolate relevant bits of sector */
#define DPCYL(c, s) ((c) + (((s) & 0xc0)<<2)) /* and those that are cylinder */

/*
 * Disk-specific ioctls.
 */
		/* get and set disklabel; DIOCGPART used internally */
#define DIOCGDINFO	_IOR('d', 101, struct disklabel)/* get */
#define DIOCSDINFO	_IOW('d', 102, struct disklabel)/* set */
#define DIOCWDINFO	_IOW('d', 103, struct disklabel)/* set, update disk */
#define DIOCGPART	_IOW('d', 104, struct partinfo)	/* get partition */

/* do format operation, read or write */
#define DIOCRFORMAT	_IOWR('d', 105, struct format_op)
#define DIOCWFORMAT	_IOWR('d', 106, struct format_op)

#define DIOCSSTEP	_IOW('d', 107, int)	/* set step rate */
#define DIOCSRETRIES	_IOW('d', 108, int)	/* set # of retries */
#define DIOCWLABEL	_IOW('d', 109, int)	/* write en/disable label */

#define DIOCSBAD	_IOW('d', 110, struct dkbad)	/* set kernel dkbad */
#define DIOCSBADSCAN	_IOW('d', 111, int)	/* set badscan mode */

/*
 * XXX encoding of disk minor numbers, should be elsewhere.
 *
 * See <sys/reboot.h> for a possibly better encoding.
 *
 * "cpio -H newc" can be used to back up device files with large minor
 * numbers (but not ones >= 2^31).  Old cpio formats and all tar formats
 * don't have enough bits, and cpio and tar don't notice the lossage.
 * There are also some sign extension bugs.
 */

/*
       3                   2                   1                   0
     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
    _________________________________________________________________
    | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
    -----------------------------------------------------------------
    |      TYPE           | SLICE   |  MAJOR?       |  UNIT   |PART |
    -----------------------------------------------------------------
    |      TYPE     |PART2| SLICE   |  MAJOR?       |  UNIT   |PART | <-soon
    -----------------------------------------------------------------

	I want 3 more part bits (taken from 'TYPE' (useless as it is) (JRE)
*/
#define	dkmakeminor(unit, slice, part) \
				(((slice) << 16) | ((unit) << 3) | (part))
#define	dkmodpart(dev, part)	(((dev) & ~(dev_t)7) | (part))
#define	dkmodslice(dev, slice)	(((dev) & ~(dev_t)0x1f0000) | ((slice) << 16))
#define	dkpart(dev)		(minor(dev) & 7)
#define	dkslice(dev)		((minor(dev) >> 16) & 0x1f)
#define	dktype(dev)       	((minor(dev) >> 21) & 0x7ff)
#define	dkunit(dev)		((minor(dev) >> 3) & 0x1f)

#ifdef KERNEL

struct	buf_queue_head;

int	bounds_check_with_label __P((struct buf *bp, struct disklabel *lp,
				     int wlabel));
void	diskerr __P((struct buf *bp, char *dname, char *what, int pri,
		     int blkdone, struct disklabel *lp));
void	disksort __P((struct buf *ap, struct buf *bp));
u_int	dkcksum __P((struct disklabel *lp));
char	*readdisklabel __P((dev_t dev, void (*strat)(struct buf *bp),
			    struct disklabel *lp));
void	tqdisksort __P((struct buf_queue_head *ap, struct buf *bp));
int	setdisklabel __P((struct disklabel *olp, struct disklabel *nlp,
			  u_long openmask));
int	writedisklabel __P((dev_t dev, void (*strat)(struct buf *bp),
			    struct disklabel *lp));

#endif /* KERNEL */

#endif /* LOCORE */

#if !defined(KERNEL) && !defined(LOCORE)

#include <sys/cdefs.h>

__BEGIN_DECLS
struct disklabel *getdiskbyname __P((const char *));
__END_DECLS

#endif

#endif /* !_SYS_DISKLABEL_H_ */