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1.1 root 1: /*
2: * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * The contents of this file constitute Original Code as defined in and
7: * are subject to the Apple Public Source License Version 1.1 (the
8: * "License"). You may not use this file except in compliance with the
9: * License. Please obtain a copy of the License at
10: * http://www.apple.com/publicsource and read it before using this file.
11: *
12: * This Original Code and all software distributed under the License are
13: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17: * License for the specific language governing rights and limitations
18: * under the License.
19: *
20: * @APPLE_LICENSE_HEADER_END@
21: */
22: /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
23: /*
24: * Copyright (c) 1987, 1988, 1993
25: * The Regents of the University of California. All rights reserved.
26: *
27: * Redistribution and use in source and binary forms, with or without
28: * modification, are permitted provided that the following conditions
29: * are met:
30: * 1. Redistributions of source code must retain the above copyright
31: * notice, this list of conditions and the following disclaimer.
32: * 2. Redistributions in binary form must reproduce the above copyright
33: * notice, this list of conditions and the following disclaimer in the
34: * documentation and/or other materials provided with the distribution.
35: * 3. All advertising materials mentioning features or use of this software
36: * must display the following acknowledgement:
37: * This product includes software developed by the University of
38: * California, Berkeley and its contributors.
39: * 4. Neither the name of the University nor the names of its contributors
40: * may be used to endorse or promote products derived from this software
41: * without specific prior written permission.
42: *
43: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
44: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
45: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
46: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
47: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
48: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
49: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
50: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
51: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
52: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53: * SUCH DAMAGE.
54: *
55: * @(#)disklabel.h 8.2 (Berkeley) 7/10/94
56: */
57: #ifndef _SYS_DISKLABEL_H_
58: #define _SYS_DISKLABEL_H_
59:
60: /*
61: * Disk description table, see disktab(5)
62: */
63: #define _PATH_DISKTAB "/etc/disktab"
64: #define DISKTAB "/etc/disktab" /* deprecated */
65:
66: /*
67: * Each disk has a label which includes information about the hardware
68: * disk geometry, filesystem partitions, and drive specific information.
69: * The location of the label, as well as the number of partitions the
70: * label can describe and the number of the "whole disk" (raw)
71: * paritition are machine dependent.
72: */
73: #include <machine/disklabel.h>
74:
75: /*
76: * The absolute maximum number of disk partitions allowed.
77: * This is the maximum value of MAXPARTITIONS for which 'struct disklabel'
78: * is <= DEV_BSIZE bytes long. If MAXPARTITIONS is greater than this, beware.
79: */
80: #define MAXMAXPARTITIONS 22
81: #if MAXPARTITIONS > MAXMAXPARTITIONS
82: #warning beware: MAXPARTITIONS bigger than MAXMAXPARTITIONS
83: #endif
84:
85: /*
86: * Translate between device numbers and major/disk unit/disk partition.
87: */
88: #define DISKUNIT(dev) (minor(dev) / MAXPARTITIONS)
89: #define DISKPART(dev) (minor(dev) % MAXPARTITIONS)
90: #define MAKEDISKDEV(maj, unit, part) \
91: (makedev((maj), ((unit) * MAXPARTITIONS) + (part)))
92:
93: #define DISKMAGIC ((u_int32_t)0x82564557) /* The disk magic number */
94:
95: #ifndef LOCORE
96: struct disklabel {
97: u_int32_t d_magic; /* the magic number */
98: u_int16_t d_type; /* drive type */
99: u_int16_t d_subtype; /* controller/d_type specific */
100: char d_typename[16]; /* type name, e.g. "eagle" */
101:
102: /*
103: * d_packname contains the pack identifier and is returned when
104: * the disklabel is read off the disk or in-core copy.
105: * d_boot0 and d_boot1 are the (optional) names of the
106: * primary (block 0) and secondary (block 1-15) bootstraps
107: * as found in /usr/mdec. These are returned when using
108: * getdiskbyname(3) to retrieve the values from /etc/disktab.
109: */
110: union {
111: char un_d_packname[16]; /* pack identifier */
112: struct {
113: char *un_d_boot0; /* primary bootstrap name */
114: char *un_d_boot1; /* secondary bootstrap name */
115: } un_b;
116: } d_un;
117: #define d_packname d_un.un_d_packname
118: #define d_boot0 d_un.un_b.un_d_boot0
119: #define d_boot1 d_un.un_b.un_d_boot1
120:
121: /* disk geometry: */
122: u_int32_t d_secsize; /* # of bytes per sector */
123: u_int32_t d_nsectors; /* # of data sectors per track */
124: u_int32_t d_ntracks; /* # of tracks per cylinder */
125: u_int32_t d_ncylinders; /* # of data cylinders per unit */
126: u_int32_t d_secpercyl; /* # of data sectors per cylinder */
127: u_int32_t d_secperunit; /* # of data sectors per unit */
128:
129: /*
130: * Spares (bad sector replacements) below are not counted in
131: * d_nsectors or d_secpercyl. Spare sectors are assumed to
132: * be physical sectors which occupy space at the end of each
133: * track and/or cylinder.
134: */
135: u_int16_t d_sparespertrack; /* # of spare sectors per track */
136: u_int16_t d_sparespercyl; /* # of spare sectors per cylinder */
137: /*
138: * Alternate cylinders include maintenance, replacement, configuration
139: * description areas, etc.
140: */
141: u_int32_t d_acylinders; /* # of alt. cylinders per unit */
142:
143: /* hardware characteristics: */
144: /*
145: * d_interleave, d_trackskew and d_cylskew describe perturbations
146: * in the media format used to compensate for a slow controller.
147: * Interleave is physical sector interleave, set up by the
148: * formatter or controller when formatting. When interleaving is
149: * in use, logically adjacent sectors are not physically
150: * contiguous, but instead are separated by some number of
151: * sectors. It is specified as the ratio of physical sectors
152: * traversed per logical sector. Thus an interleave of 1:1
153: * implies contiguous layout, while 2:1 implies that logical
154: * sector 0 is separated by one sector from logical sector 1.
155: * d_trackskew is the offset of sector 0 on track N relative to
156: * sector 0 on track N-1 on the same cylinder. Finally, d_cylskew
157: * is the offset of sector 0 on cylinder N relative to sector 0
158: * on cylinder N-1.
159: */
160: u_int16_t d_rpm; /* rotational speed */
161: u_int16_t d_interleave; /* hardware sector interleave */
162: u_int16_t d_trackskew; /* sector 0 skew, per track */
163: u_int16_t d_cylskew; /* sector 0 skew, per cylinder */
164: u_int32_t d_headswitch; /* head switch time, usec */
165: u_int32_t d_trkseek; /* track-to-track seek, usec */
166: u_int32_t d_flags; /* generic flags */
167: #define NDDATA 5
168: u_int32_t d_drivedata[NDDATA]; /* drive-type specific information */
169: #define NSPARE 5
170: u_int32_t d_spare[NSPARE]; /* reserved for future use */
171: u_int32_t d_magic2; /* the magic number (again) */
172: u_int16_t d_checksum; /* xor of data incl. partitions */
173:
174: /* filesystem and partition information: */
175: u_int16_t d_npartitions; /* number of partitions in following */
176: u_int32_t d_bbsize; /* size of boot area at sn0, bytes */
177: u_int32_t d_sbsize; /* max size of fs superblock, bytes */
178: struct partition { /* the partition table */
179: u_int32_t p_size; /* number of sectors in partition */
180: u_int32_t p_offset; /* starting sector */
181: u_int32_t p_fsize; /* filesystem basic fragment size */
182: u_int8_t p_fstype; /* filesystem type, see below */
183: u_int8_t p_frag; /* filesystem fragments per block */
184: union {
185: u_int16_t cpg; /* UFS: FS cylinders per group */
186: u_int16_t sgs; /* LFS: FS segment shift */
187: } __partition_u1;
188: #define p_cpg __partition_u1.cpg
189: #define p_sgs __partition_u1.sgs
190: } d_partitions[MAXPARTITIONS]; /* actually may be more */
191: };
192: #else /* LOCORE */
193: /*
194: * offsets for asm boot files.
195: */
196: .set d_secsize,40
197: .set d_nsectors,44
198: .set d_ntracks,48
199: .set d_ncylinders,52
200: .set d_secpercyl,56
201: .set d_secperunit,60
202: .set d_end_,276 /* size of disk label */
203: #endif /* LOCORE */
204:
205: /* d_type values: */
206: #define DTYPE_SMD 1 /* SMD, XSMD; VAX hp/up */
207: #define DTYPE_MSCP 2 /* MSCP */
208: #define DTYPE_DEC 3 /* other DEC (rk, rl) */
209: #define DTYPE_SCSI 4 /* SCSI */
210: #define DTYPE_ESDI 5 /* ESDI interface */
211: #define DTYPE_ST506 6 /* ST506 etc. */
212: #define DTYPE_HPIB 7 /* CS/80 on HP-IB */
213: #define DTYPE_HPFL 8 /* HP Fiber-link */
214: #define DTYPE_FLOPPY 10 /* floppy */
215:
216: #ifdef DKTYPENAMES
217: static char *dktypenames[] = {
218: "unknown",
219: "SMD",
220: "MSCP",
221: "old DEC",
222: "SCSI",
223: "ESDI",
224: "ST506",
225: "HP-IB",
226: "HP-FL",
227: "type 9",
228: "floppy",
229: NULL
230: };
231: #define DKMAXTYPES (sizeof(dktypenames) / sizeof(dktypenames[0]) - 1)
232: #endif
233:
234: /*
235: * Filesystem type and version.
236: * Used to interpret other filesystem-specific
237: * per-partition information.
238: */
239: #define FS_UNUSED 0 /* unused */
240: #define FS_SWAP 1 /* swap */
241: #define FS_V6 2 /* Sixth Edition */
242: #define FS_V7 3 /* Seventh Edition */
243: #define FS_SYSV 4 /* System V */
244: #define FS_V71K 5 /* V7 with 1K blocks (4.1, 2.9) */
245: #define FS_V8 6 /* Eighth Edition, 4K blocks */
246: #define FS_BSDFFS 7 /* 4.2BSD fast file system */
247: #define FS_MSDOS 8 /* MSDOS file system */
248: #define FS_BSDLFS 9 /* 4.4BSD log-structured file system */
249: #define FS_OTHER 10 /* in use, but unknown/unsupported */
250: #define FS_HPFS 11 /* OS/2 high-performance file system */
251: #define FS_ISO9660 12 /* ISO 9660, normally CD-ROM */
252: #define FS_BOOT 13 /* partition contains bootstrap */
253: #define FS_ADOS 14 /* AmigaDOS fast file system */
254: #define FS_HFS 15 /* Macintosh HFS */
255:
256: #ifdef DKTYPENAMES
257: static char *fstypenames[] = {
258: "unused",
259: "swap",
260: "Version 6",
261: "Version 7",
262: "System V",
263: "4.1BSD",
264: "Eighth Edition",
265: "4.2BSD",
266: "MSDOS",
267: "4.4LFS",
268: "unknown",
269: "HPFS",
270: "ISO9660",
271: "boot",
272: "ADOS",
273: "HFS",
274: NULL
275: };
276: #define FSMAXTYPES (sizeof(fstypenames) / sizeof(fstypenames[0]) - 1)
277: #endif
278:
279: /*
280: * flags shared by various drives:
281: */
282: #define D_REMOVABLE 0x01 /* removable media */
283: #define D_ECC 0x02 /* supports ECC */
284: #define D_BADSECT 0x04 /* supports bad sector forw. */
285: #define D_RAMDISK 0x08 /* disk emulator */
286: #define D_CHAIN 0x10 /* can do back-back transfers */
287:
288: /*
289: * Drive data for SMD.
290: */
291: #define d_smdflags d_drivedata[0]
292: #define D_SSE 0x1 /* supports skip sectoring */
293: #define d_mindist d_drivedata[1]
294: #define d_maxdist d_drivedata[2]
295: #define d_sdist d_drivedata[3]
296:
297: /*
298: * Drive data for ST506.
299: */
300: #define d_precompcyl d_drivedata[0]
301: #define d_gap3 d_drivedata[1] /* used only when formatting */
302:
303: /*
304: * Drive data for SCSI.
305: */
306: #define d_blind d_drivedata[0]
307:
308: #ifndef LOCORE
309: /*
310: * Structure used to perform a format or other raw operation, returning
311: * data and/or register values. Register identification and format
312: * are device- and driver-dependent.
313: */
314: struct format_op {
315: char *df_buf;
316: int df_count; /* value-result */
317: daddr_t df_startblk;
318: int df_reg[8]; /* result */
319: };
320:
321: /*
322: * Structure used internally to retrieve information about a partition
323: * on a disk.
324: */
325: struct partinfo {
326: struct disklabel *disklab;
327: struct partition *part;
328: };
329:
330: /*
331: * Disk-specific ioctls.
332: */
333: /* get and set disklabel; DIOCGPART used internally */
334: #define DIOCGDINFO _IOR('d', 101, struct disklabel)/* get */
335: #define DIOCSDINFO _IOW('d', 102, struct disklabel)/* set */
336: #define DIOCWDINFO _IOW('d', 103, struct disklabel)/* set, update disk */
337: #define DIOCGPART _IOW('d', 104, struct partinfo) /* get partition */
338:
339: /* do format operation, read or write */
340: #define DIOCRFORMAT _IOWR('d', 105, struct format_op)
341: #define DIOCWFORMAT _IOWR('d', 106, struct format_op)
342:
343: #define DIOCSSTEP _IOW('d', 107, int) /* set step rate */
344: #define DIOCSRETRIES _IOW('d', 108, int) /* set # of retries */
345: #define DIOCWLABEL _IOW('d', 109, int) /* write en/disable label */
346:
347: #define DIOCSBAD _IOW('d', 110, struct dkbad) /* set kernel dkbad */
348:
349: #endif /* LOCORE */
350:
351: #if !defined(KERNEL) && !defined(LOCORE)
352:
353: #include <sys/cdefs.h>
354:
355: __BEGIN_DECLS
356: struct disklabel *getdiskbyname __P((const char *));
357: __END_DECLS
358:
359: #endif
360:
361: #endif /* ! _SYS_DISKLABEL_H_ */
362:
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