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1.1 root 1: /*
2: * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
7: * Reserved. This file contains Original Code and/or Modifications of
8: * Original Code as defined in and that are subject to the Apple Public
9: * Source License Version 1.1 (the "License"). You may not use this file
10: * except in compliance with the License. Please obtain a copy of the
11: * License at http://www.apple.com/publicsource and read it before using
12: * this file.
13: *
14: * The Original Code and all software distributed under the License are
15: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
16: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
17: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
18: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
19: * License for the specific language governing rights and limitations
20: * under the License.
21: *
22: * @APPLE_LICENSE_HEADER_END@
23: */
24:
25: /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
26: /*
27: * Copyright (c) 1987, 1988, 1993
28: * The Regents of the University of California. All rights reserved.
29: *
30: * Redistribution and use in source and binary forms, with or without
31: * modification, are permitted provided that the following conditions
32: * are met:
33: * 1. Redistributions of source code must retain the above copyright
34: * notice, this list of conditions and the following disclaimer.
35: * 2. Redistributions in binary form must reproduce the above copyright
36: * notice, this list of conditions and the following disclaimer in the
37: * documentation and/or other materials provided with the distribution.
38: * 3. All advertising materials mentioning features or use of this software
39: * must display the following acknowledgement:
40: * This product includes software developed by the University of
41: * California, Berkeley and its contributors.
42: * 4. Neither the name of the University nor the names of its contributors
43: * may be used to endorse or promote products derived from this software
44: * without specific prior written permission.
45: *
46: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
47: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
48: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
49: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
50: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
51: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
52: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
53: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
54: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
55: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
56: * SUCH DAMAGE.
57: *
58: * @(#)disklabel.h 8.2 (Berkeley) 7/10/94
59: */
60:
61: /*
62: * Disk description table, see disktab(5)
63: */
64: #define _PATH_DISKTAB "/etc/disktab"
65: #define DISKTAB "/etc/disktab" /* deprecated */
66:
67: /*
68: * Each disk has a label which includes information about the hardware
69: * disk geometry, filesystem partitions, and drive specific information.
70: * The location of the label, as well as the number of partitions the
71: * label can describe and the number of the "whole disk" (raw)
72: * paritition are machine dependent.
73: */
74: #include <machine/disklabel.h>
75:
76: /*
77: * The absolute maximum number of disk partitions allowed.
78: * This is the maximum value of MAXPARTITIONS for which 'struct disklabel'
79: * is <= DEV_BSIZE bytes long. If MAXPARTITIONS is greater than this, beware.
80: */
81: #define MAXMAXPARTITIONS 22
82: #if MAXPARTITIONS > MAXMAXPARTITIONS
83: #warning beware: MAXPARTITIONS bigger than MAXMAXPARTITIONS
84: #endif
85:
86: /*
87: * Translate between device numbers and major/disk unit/disk partition.
88: */
89: #define DISKUNIT(dev) (minor(dev) / MAXPARTITIONS)
90: #define DISKPART(dev) (minor(dev) % MAXPARTITIONS)
91: #define MAKEDISKDEV(maj, unit, part) \
92: (makedev((maj), ((unit) * MAXPARTITIONS) + (part)))
93:
94: #define DISKMAGIC ((u_int32_t)0x82564557) /* The disk magic number */
95:
96: #ifndef LOCORE
97: struct disklabel {
98: u_int32_t d_magic; /* the magic number */
99: u_int16_t d_type; /* drive type */
100: u_int16_t d_subtype; /* controller/d_type specific */
101: char d_typename[16]; /* type name, e.g. "eagle" */
102:
103: /*
104: * d_packname contains the pack identifier and is returned when
105: * the disklabel is read off the disk or in-core copy.
106: * d_boot0 and d_boot1 are the (optional) names of the
107: * primary (block 0) and secondary (block 1-15) bootstraps
108: * as found in /usr/mdec. These are returned when using
109: * getdiskbyname(3) to retrieve the values from /etc/disktab.
110: */
111: union {
112: char un_d_packname[16]; /* pack identifier */
113: struct {
114: char *un_d_boot0; /* primary bootstrap name */
115: char *un_d_boot1; /* secondary bootstrap name */
116: } un_b;
117: } d_un;
118: #define d_packname d_un.un_d_packname
119: #define d_boot0 d_un.un_b.un_d_boot0
120: #define d_boot1 d_un.un_b.un_d_boot1
121:
122: /* disk geometry: */
123: u_int32_t d_secsize; /* # of bytes per sector */
124: u_int32_t d_nsectors; /* # of data sectors per track */
125: u_int32_t d_ntracks; /* # of tracks per cylinder */
126: u_int32_t d_ncylinders; /* # of data cylinders per unit */
127: u_int32_t d_secpercyl; /* # of data sectors per cylinder */
128: u_int32_t d_secperunit; /* # of data sectors per unit */
129:
130: /*
131: * Spares (bad sector replacements) below are not counted in
132: * d_nsectors or d_secpercyl. Spare sectors are assumed to
133: * be physical sectors which occupy space at the end of each
134: * track and/or cylinder.
135: */
136: u_int16_t d_sparespertrack; /* # of spare sectors per track */
137: u_int16_t d_sparespercyl; /* # of spare sectors per cylinder */
138: /*
139: * Alternate cylinders include maintenance, replacement, configuration
140: * description areas, etc.
141: */
142: u_int32_t d_acylinders; /* # of alt. cylinders per unit */
143:
144: /* hardware characteristics: */
145: /*
146: * d_interleave, d_trackskew and d_cylskew describe perturbations
147: * in the media format used to compensate for a slow controller.
148: * Interleave is physical sector interleave, set up by the
149: * formatter or controller when formatting. When interleaving is
150: * in use, logically adjacent sectors are not physically
151: * contiguous, but instead are separated by some number of
152: * sectors. It is specified as the ratio of physical sectors
153: * traversed per logical sector. Thus an interleave of 1:1
154: * implies contiguous layout, while 2:1 implies that logical
155: * sector 0 is separated by one sector from logical sector 1.
156: * d_trackskew is the offset of sector 0 on track N relative to
157: * sector 0 on track N-1 on the same cylinder. Finally, d_cylskew
158: * is the offset of sector 0 on cylinder N relative to sector 0
159: * on cylinder N-1.
160: */
161: u_int16_t d_rpm; /* rotational speed */
162: u_int16_t d_interleave; /* hardware sector interleave */
163: u_int16_t d_trackskew; /* sector 0 skew, per track */
164: u_int16_t d_cylskew; /* sector 0 skew, per cylinder */
165: u_int32_t d_headswitch; /* head switch time, usec */
166: u_int32_t d_trkseek; /* track-to-track seek, usec */
167: u_int32_t d_flags; /* generic flags */
168: #define NDDATA 5
169: u_int32_t d_drivedata[NDDATA]; /* drive-type specific information */
170: #define NSPARE 5
171: u_int32_t d_spare[NSPARE]; /* reserved for future use */
172: u_int32_t d_magic2; /* the magic number (again) */
173: u_int16_t d_checksum; /* xor of data incl. partitions */
174:
175: /* filesystem and partition information: */
176: u_int16_t d_npartitions; /* number of partitions in following */
177: u_int32_t d_bbsize; /* size of boot area at sn0, bytes */
178: u_int32_t d_sbsize; /* max size of fs superblock, bytes */
179: struct partition { /* the partition table */
180: u_int32_t p_size; /* number of sectors in partition */
181: u_int32_t p_offset; /* starting sector */
182: u_int32_t p_fsize; /* filesystem basic fragment size */
183: u_int8_t p_fstype; /* filesystem type, see below */
184: u_int8_t p_frag; /* filesystem fragments per block */
185: union {
186: u_int16_t cpg; /* UFS: FS cylinders per group */
187: u_int16_t sgs; /* LFS: FS segment shift */
188: } __partition_u1;
189: #define p_cpg __partition_u1.cpg
190: #define p_sgs __partition_u1.sgs
191: } d_partitions[MAXPARTITIONS]; /* actually may be more */
192: };
193: #else /* LOCORE */
194: /*
195: * offsets for asm boot files.
196: */
197: .set d_secsize,40
198: .set d_nsectors,44
199: .set d_ntracks,48
200: .set d_ncylinders,52
201: .set d_secpercyl,56
202: .set d_secperunit,60
203: .set d_end_,276 /* size of disk label */
204: #endif /* LOCORE */
205:
206: /* d_type values: */
207: #define DTYPE_SMD 1 /* SMD, XSMD; VAX hp/up */
208: #define DTYPE_MSCP 2 /* MSCP */
209: #define DTYPE_DEC 3 /* other DEC (rk, rl) */
210: #define DTYPE_SCSI 4 /* SCSI */
211: #define DTYPE_ESDI 5 /* ESDI interface */
212: #define DTYPE_ST506 6 /* ST506 etc. */
213: #define DTYPE_HPIB 7 /* CS/80 on HP-IB */
214: #define DTYPE_HPFL 8 /* HP Fiber-link */
215: #define DTYPE_FLOPPY 10 /* floppy */
216:
217: #ifdef DKTYPENAMES
218: static char *dktypenames[] = {
219: "unknown",
220: "SMD",
221: "MSCP",
222: "old DEC",
223: "SCSI",
224: "ESDI",
225: "ST506",
226: "HP-IB",
227: "HP-FL",
228: "type 9",
229: "floppy",
230: NULL
231: };
232: #define DKMAXTYPES (sizeof(dktypenames) / sizeof(dktypenames[0]) - 1)
233: #endif
234:
235: /*
236: * Filesystem type and version.
237: * Used to interpret other filesystem-specific
238: * per-partition information.
239: */
240: #define FS_UNUSED 0 /* unused */
241: #define FS_SWAP 1 /* swap */
242: #define FS_V6 2 /* Sixth Edition */
243: #define FS_V7 3 /* Seventh Edition */
244: #define FS_SYSV 4 /* System V */
245: #define FS_V71K 5 /* V7 with 1K blocks (4.1, 2.9) */
246: #define FS_V8 6 /* Eighth Edition, 4K blocks */
247: #define FS_BSDFFS 7 /* 4.2BSD fast file system */
248: #define FS_MSDOS 8 /* MSDOS file system */
249: #define FS_BSDLFS 9 /* 4.4BSD log-structured file system */
250: #define FS_OTHER 10 /* in use, but unknown/unsupported */
251: #define FS_HPFS 11 /* OS/2 high-performance file system */
252: #define FS_ISO9660 12 /* ISO 9660, normally CD-ROM */
253: #define FS_BOOT 13 /* partition contains bootstrap */
254: #define FS_ADOS 14 /* AmigaDOS fast file system */
255: #define FS_HFS 15 /* Macintosh HFS */
256:
257: #ifdef DKTYPENAMES
258: static char *fstypenames[] = {
259: "unused",
260: "swap",
261: "Version 6",
262: "Version 7",
263: "System V",
264: "4.1BSD",
265: "Eighth Edition",
266: "4.2BSD",
267: "MSDOS",
268: "4.4LFS",
269: "unknown",
270: "HPFS",
271: "ISO9660",
272: "boot",
273: "ADOS",
274: "HFS",
275: NULL
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 or other raw operation, returning
312: * data and/or register values. Register identification and format
313: * are device- and driver-dependent.
314: */
315: struct format_op {
316: char *df_buf;
317: int df_count; /* value-result */
318: daddr_t df_startblk;
319: int df_reg[8]; /* result */
320: };
321:
322: /*
323: * Structure used internally to retrieve information about a partition
324: * on a disk.
325: */
326: struct partinfo {
327: struct disklabel *disklab;
328: struct partition *part;
329: };
330:
331: /*
332: * Disk-specific ioctls.
333: */
334: /* get and set disklabel; DIOCGPART used internally */
335: #define DIOCGDINFO _IOR('d', 101, struct disklabel)/* get */
336: #define DIOCSDINFO _IOW('d', 102, struct disklabel)/* set */
337: #define DIOCWDINFO _IOW('d', 103, struct disklabel)/* set, update disk */
338: #define DIOCGPART _IOW('d', 104, struct partinfo) /* get partition */
339:
340: /* do format operation, read or write */
341: #define DIOCRFORMAT _IOWR('d', 105, struct format_op)
342: #define DIOCWFORMAT _IOWR('d', 106, struct format_op)
343:
344: #define DIOCSSTEP _IOW('d', 107, int) /* set step rate */
345: #define DIOCSRETRIES _IOW('d', 108, int) /* set # of retries */
346: #define DIOCWLABEL _IOW('d', 109, int) /* write en/disable label */
347:
348: #define DIOCSBAD _IOW('d', 110, struct dkbad) /* set kernel dkbad */
349:
350: #endif /* LOCORE */
351:
352: #if !defined(_KERNEL) && !defined(LOCORE)
353:
354: #include <sys/cdefs.h>
355:
356: __BEGIN_DECLS
357: struct disklabel *getdiskbyname __P((const char *));
358: __END_DECLS
359:
360: #endif
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