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1.1 root 1: /*
2: * Mach Operating System
3: * Copyright (c) 1991,1990,1989 Carnegie Mellon University
4: * All Rights Reserved.
5: *
6: * Permission to use, copy, modify and distribute this software and its
7: * documentation is hereby granted, provided that both the copyright
8: * notice and this permission notice appear in all copies of the
9: * software, derivative works or modified versions, and any portions
10: * thereof, and that both notices appear in supporting documentation.
11: *
12: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
13: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
14: * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
15: *
16: * Carnegie Mellon requests users of this software to return to
17: *
18: * Software Distribution Coordinator or [email protected]
19: * School of Computer Science
20: * Carnegie Mellon University
21: * Pittsburgh PA 15213-3890
22: *
23: * any improvements or extensions that they make and grant Carnegie Mellon
24: * the rights to redistribute these changes.
25: */
26: /*
27: * Copyright (c) 1987, 1988 Regents of the University of California.
28: * 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: * 4. The name of the Laboratory may not be used to endorse or promote
39: * products derived from this software without specific prior written
40: * permission.
41: *
42: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
43: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
44: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
45: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
46: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
47: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
48: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
49: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
50: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
51: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52: * SUCH DAMAGE.
53: *
54: * @(#)disklabel.h 7.10 (Berkeley) 6/27/88
55: */
56:
57: #ifndef _DISK_STATUS_H_
58: #define _DISK_STATUS_H_
59:
60: /*
61: * Each disk has a label which includes information about the hardware
62: * disk geometry, filesystem partitions, and drive specific information.
63: * The label is in block 0 or 1, possibly offset from the beginning
64: * to leave room for a bootstrap, etc.
65: */
66:
67: #define LABELSECTOR 0 /* sector containing label */
68: #define LABELOFFSET 64 /* offset of label in sector */
69: #define DISKMAGIC ((unsigned int) 0x82564557U) /* The disk magic number */
70: #ifndef MAXPARTITIONS
71: #define MAXPARTITIONS 8
72: #endif
73:
74:
75: #ifndef LOCORE
76: struct disklabel {
77: unsigned int d_magic; /* the magic number */
78: short d_type; /* drive type */
79: short d_subtype; /* controller/d_type specific */
80: char d_typename[16]; /* type name, e.g. "eagle" */
81: /*
82: * d_packname contains the pack identifier and is returned when
83: * the disklabel is read off the disk or in-core copy.
84: * d_boot0 and d_boot1 are the (optional) names of the
85: * primary (block 0) and secondary (block 1-15) bootstraps
86: * as found in /usr/mdec. These are returned when using
87: * getdiskbyname(3) to retrieve the values from /etc/disktab.
88: */
89: #if defined(MACH_KERNEL) || defined(STANDALONE)
90: char d_packname[16]; /* pack identifier */
91: #else
92: union {
93: char un_d_packname[16]; /* pack identifier */
94: struct {
95: char *un_d_boot0; /* primary bootstrap name */
96: char *un_d_boot1; /* secondary bootstrap name */
97: } un_b;
98: } d_un;
99: #define d_packname d_un.un_d_packname
100: #define d_boot0 d_un.un_b.un_d_boot0
101: #define d_boot1 d_un.un_b.un_d_boot1
102: #endif /* ! MACH_KERNEL or STANDALONE */
103: /* disk geometry: */
104: unsigned int d_secsize; /* # of bytes per sector */
105: unsigned int d_nsectors; /* # of data sectors per track */
106: unsigned int d_ntracks; /* # of tracks per cylinder */
107: unsigned int d_ncylinders; /* # of data cylinders per unit */
108: unsigned int d_secpercyl; /* # of data sectors per cylinder */
109: unsigned int d_secperunit; /* # of data sectors per unit */
110: /*
111: * Spares (bad sector replacements) below
112: * are not counted in d_nsectors or d_secpercyl.
113: * Spare sectors are assumed to be physical sectors
114: * which occupy space at the end of each track and/or cylinder.
115: */
116: unsigned short d_sparespertrack; /* # of spare sectors per track */
117: unsigned short d_sparespercyl; /* # of spare sectors per cylinder */
118: /*
119: * Alternate cylinders include maintenance, replacement,
120: * configuration description areas, etc.
121: */
122: unsigned int d_acylinders; /* # of alt. cylinders per unit */
123:
124: /* hardware characteristics: */
125: /*
126: * d_interleave, d_trackskew and d_cylskew describe perturbations
127: * in the media format used to compensate for a slow controller.
128: * Interleave is physical sector interleave, set up by the formatter
129: * or controller when formatting. When interleaving is in use,
130: * logically adjacent sectors are not physically contiguous,
131: * but instead are separated by some number of sectors.
132: * It is specified as the ratio of physical sectors traversed
133: * per logical sector. Thus an interleave of 1:1 implies contiguous
134: * layout, while 2:1 implies that logical sector 0 is separated
135: * by one sector from logical sector 1.
136: * d_trackskew is the offset of sector 0 on track N
137: * relative to sector 0 on track N-1 on the same cylinder.
138: * Finally, d_cylskew is the offset of sector 0 on cylinder N
139: * relative to sector 0 on cylinder N-1.
140: */
141: unsigned short d_rpm; /* rotational speed */
142: unsigned short d_interleave; /* hardware sector interleave */
143: unsigned short d_trackskew; /* sector 0 skew, per track */
144: unsigned short d_cylskew; /* sector 0 skew, per cylinder */
145: unsigned int d_headswitch; /* head switch time, usec */
146: unsigned int d_trkseek; /* track-to-track seek, usec */
147: unsigned int d_flags; /* generic flags */
148: #define NDDATA 5
149: unsigned int d_drivedata[NDDATA]; /* drive-type specific information */
150: #define NSPARE 5
151: unsigned int d_spare[NSPARE]; /* reserved for future use */
152: unsigned int d_magic2; /* the magic number (again) */
153: unsigned short d_checksum; /* xor of data incl. partitions */
154:
155: /* filesystem and partition information: */
156: unsigned short d_npartitions; /* number of partitions in following */
157: unsigned int d_bbsize; /* size of boot area at sn0, bytes */
158: unsigned int d_sbsize; /* max size of fs superblock, bytes */
159: struct partition { /* the partition table */
160: unsigned int p_size; /* number of sectors in partition */
161: unsigned int p_offset; /* starting sector */
162: unsigned int p_fsize; /* filesystem basic fragment size */
163: unsigned char p_fstype; /* filesystem type, see below */
164: unsigned char p_frag; /* filesystem fragments per block */
165: unsigned short p_cpg; /* filesystem cylinders per group */
166: } d_partitions[MAXPARTITIONS+1]; /* actually may be more */
167:
168: #if defined(alpha) && defined(MACH_KERNEL)
169: /*
170: * Disgusting hack. If this structure contains a pointer,
171: * as it does for non-kernel, then the compiler rounds
172: * the size to make it pointer-sized properly (arrays of..).
173: * But if I define the pointer for the kernel then instances
174: * of this structure better be aligned otherwise picking
175: * up a short might be done by too-smart compilers (GCC) with
176: * a load-long instruction expecting the short to be aligned.
177: * I bet the OSF folks stomped into this too, since they use
178: * the same disgusting hack below.. [whatelse can I do ??]
179: */
180: int bugfix;
181: #endif
182: };
183: #else /* LOCORE */
184: /*
185: * offsets for asm boot files.
186: */
187: .set d_secsize,40
188: .set d_nsectors,44
189: .set d_ntracks,48
190: .set d_ncylinders,52
191: .set d_secpercyl,56
192: .set d_secperunit,60
193: .set d_end_,276 /* size of disk label */
194: #endif /* LOCORE */
195:
196: /* d_type values: */
197: #define DTYPE_SMD 1 /* SMD, XSMD; VAX hp/up */
198: #define DTYPE_MSCP 2 /* MSCP */
199: #define DTYPE_DEC 3 /* other DEC (rk, rl) */
200: #define DTYPE_SCSI 4 /* SCSI */
201: #define DTYPE_ESDI 5 /* ESDI interface */
202: #define DTYPE_ST506 6 /* ST506 etc. */
203: #define DTYPE_FLOPPY 10 /* floppy */
204:
205: #ifdef DKTYPENAMES
206: static char *dktypenames[] = {
207: "unknown",
208: "SMD",
209: "MSCP",
210: "old DEC",
211: "SCSI",
212: "ESDI",
213: "type 6",
214: "type 7",
215: "type 8",
216: "type 9",
217: "floppy",
218: 0
219: };
220: #define DKMAXTYPES (sizeof(dktypenames) / sizeof(dktypenames[0]) - 1)
221: #endif
222:
223: /*
224: * Filesystem type and version.
225: * Used to interpret other filesystem-specific
226: * per-partition information.
227: */
228: #define FS_UNUSED 0 /* unused */
229: #define FS_SWAP 1 /* swap */
230: #define FS_V6 2 /* Sixth Edition */
231: #define FS_V7 3 /* Seventh Edition */
232: #define FS_SYSV 4 /* System V */
233: #define FS_V71K 5 /* V7 with 1K blocks (4.1, 2.9) */
234: #define FS_V8 6 /* Eighth Edition, 4K blocks */
235: #define FS_BSDFFS 7 /* 4.2BSD fast file system */
236: #define FS_LINUXFS 8 /* Linux file system */
237:
238: #ifdef DKTYPENAMES
239: static char *fstypenames[] = {
240: "unused",
241: "swap",
242: "Version 6",
243: "Version 7",
244: "System V",
245: "4.1BSD",
246: "Eighth Edition",
247: "4.2BSD",
248: "Linux",
249: 0
250: };
251: #define FSMAXTYPES (sizeof(fstypenames) / sizeof(fstypenames[0]) - 1)
252: #endif
253:
254: /*
255: * flags shared by various drives:
256: */
257: #define D_REMOVABLE 0x01 /* removable media */
258: #define D_ECC 0x02 /* supports ECC */
259: #define D_BADSECT 0x04 /* supports bad sector forw. */
260: #define D_RAMDISK 0x08 /* disk emulator */
261: #define D_CHAIN 0x10 /* can do back-back transfers */
262:
263: /*
264: * Drive data for SMD.
265: */
266: #define d_smdflags d_drivedata[0]
267: #define D_SSE 0x1 /* supports skip sectoring */
268: #define d_mindist d_drivedata[1]
269: #define d_maxdist d_drivedata[2]
270: #define d_sdist d_drivedata[3]
271:
272: /*
273: * Drive data for ST506.
274: */
275: #define d_precompcyl d_drivedata[0]
276: #define d_gap3 d_drivedata[1] /* used only when formatting */
277:
278: /*
279: * IBM controller info (d_precompcyl used, too)
280: */
281: #define d_step d_drivedata[2]
282:
283: #ifndef LOCORE
284: /*
285: * Structure used to perform a format
286: * or other raw operation, returning data
287: * and/or register values.
288: * Register identification and format
289: * are device- and driver-dependent.
290: */
291: struct format_op {
292: char *df_buf;
293: int df_count; /* value-result */
294: recnum_t df_startblk;
295: int df_reg[8]; /* result */
296: };
297:
298: /*
299: * Disk-specific ioctls.
300: */
301: /* get and set disklabel; DIOCGPART used internally */
302: #define DIOCGDINFO _IOR('d', 101, struct disklabel)/* get */
303: #define DIOCSDINFO _IOW('d', 102, struct disklabel)/* set */
304: #define DIOCWDINFO _IOW('d', 103, struct disklabel)/* set, update disk */
305:
306: /* do format operation, read or write */
307: #define DIOCRFORMAT _IOWR('d', 105, struct format_op)
308: #define DIOCWFORMAT _IOWR('d', 106, struct format_op)
309:
310: #define DIOCSSTEP _IOW('d', 107, int) /* set step rate */
311: #define DIOCSRETRIES _IOW('d', 108, int) /* set # of retries */
312: #define DIOCWLABEL _IOW('d', 109, int) /* write en/disable label */
313:
314: #define DIOCSBAD _IOW('d', 110, struct dkbad) /* set kernel dkbad */
315:
316: #endif /* LOCORE */
317:
318: #endif /* _DISK_STATUS_H_ */
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