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