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1.1 root 1: /*
2: * Copyright (c) 1987, 1988 Regents of the University of California.
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. All advertising materials mentioning features or use of this software
14: * must display the following acknowledgement:
15: * This product includes software developed by the University of
16: * California, Berkeley and its contributors.
17: * 4. Neither the name of the University nor the names of its contributors
18: * may be used to endorse or promote products derived from this software
19: * without specific prior written permission.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31: * SUCH DAMAGE.
32: *
33: * @(#)disklabel.h 7.19 (Berkeley) 5/7/91
34: */
35:
36: /*
37: * Disk description table, see disktab(5)
38: */
39: #define _PATH_DISKTAB "/etc/disktab"
40: #define DISKTAB "/etc/disktab" /* deprecated */
41:
42: /*
43: * Each disk has a label which includes information about the hardware
44: * disk geometry, filesystem partitions, and drive specific information.
45: * The label is in block 0 or 1, possibly offset from the beginning
46: * to leave room for a bootstrap, etc.
47: */
48:
49: /* XXX these should be defined per controller (or drive) elsewhere, not here! */
50: #ifdef i386
51: #define LABELSECTOR 1 /* sector containing label */
52: #define LABELOFFSET 0 /* offset of label in sector */
53: #endif
54:
55: #ifndef LABELSECTOR
56: #define LABELSECTOR 0 /* sector containing label */
57: #endif
58:
59: #ifndef LABELOFFSET
60: #define LABELOFFSET 64 /* offset of label in sector */
61: #endif
62:
63: #define DISKMAGIC ((u_long) 0x82564557) /* The disk magic number */
64: #ifndef MAXPARTITIONS
65: #define MAXPARTITIONS 8
66: #endif
67:
68:
69: #ifndef LOCORE
70: struct disklabel {
71: u_long d_magic; /* the magic number */
72: short d_type; /* drive type */
73: short d_subtype; /* controller/d_type specific */
74: char d_typename[16]; /* type name, e.g. "eagle" */
75: /*
76: * d_packname contains the pack identifier and is returned when
77: * the disklabel is read off the disk or in-core copy.
78: * d_boot0 and d_boot1 are the (optional) names of the
79: * primary (block 0) and secondary (block 1-15) bootstraps
80: * as found in /usr/mdec. These are returned when using
81: * getdiskbyname(3) to retrieve the values from /etc/disktab.
82: */
83: #if defined(KERNEL) || defined(STANDALONE)
84: char d_packname[16]; /* pack identifier */
85: #else
86: union {
87: char un_d_packname[16]; /* pack identifier */
88: struct {
89: char *un_d_boot0; /* primary bootstrap name */
90: char *un_d_boot1; /* secondary bootstrap name */
91: } un_b;
92: } d_un;
93: #define d_packname d_un.un_d_packname
94: #define d_boot0 d_un.un_b.un_d_boot0
95: #define d_boot1 d_un.un_b.un_d_boot1
96: #endif /* ! KERNEL or STANDALONE */
97: /* disk geometry: */
98: u_long d_secsize; /* # of bytes per sector */
99: u_long d_nsectors; /* # of data sectors per track */
100: u_long d_ntracks; /* # of tracks per cylinder */
101: u_long d_ncylinders; /* # of data cylinders per unit */
102: u_long d_secpercyl; /* # of data sectors per cylinder */
103: u_long d_secperunit; /* # of data sectors per unit */
104: /*
105: * Spares (bad sector replacements) below
106: * are not counted in d_nsectors or d_secpercyl.
107: * Spare sectors are assumed to be physical sectors
108: * which occupy space at the end of each track and/or cylinder.
109: */
110: u_short d_sparespertrack; /* # of spare sectors per track */
111: u_short d_sparespercyl; /* # of spare sectors per cylinder */
112: /*
113: * Alternate cylinders include maintenance, replacement,
114: * configuration description areas, etc.
115: */
116: u_long d_acylinders; /* # of alt. cylinders per unit */
117:
118: /* hardware characteristics: */
119: /*
120: * d_interleave, d_trackskew and d_cylskew describe perturbations
121: * in the media format used to compensate for a slow controller.
122: * Interleave is physical sector interleave, set up by the formatter
123: * or controller when formatting. When interleaving is in use,
124: * logically adjacent sectors are not physically contiguous,
125: * but instead are separated by some number of sectors.
126: * It is specified as the ratio of physical sectors traversed
127: * per logical sector. Thus an interleave of 1:1 implies contiguous
128: * layout, while 2:1 implies that logical sector 0 is separated
129: * by one sector from logical sector 1.
130: * d_trackskew is the offset of sector 0 on track N
131: * relative to sector 0 on track N-1 on the same cylinder.
132: * Finally, d_cylskew is the offset of sector 0 on cylinder N
133: * relative to sector 0 on cylinder N-1.
134: */
135: u_short d_rpm; /* rotational speed */
136: u_short d_interleave; /* hardware sector interleave */
137: u_short d_trackskew; /* sector 0 skew, per track */
138: u_short d_cylskew; /* sector 0 skew, per cylinder */
139: u_long d_headswitch; /* head switch time, usec */
140: u_long d_trkseek; /* track-to-track seek, usec */
141: u_long d_flags; /* generic flags */
142: #define NDDATA 5
143: u_long d_drivedata[NDDATA]; /* drive-type specific information */
144: #define NSPARE 5
145: u_long d_spare[NSPARE]; /* reserved for future use */
146: u_long d_magic2; /* the magic number (again) */
147: u_short d_checksum; /* xor of data incl. partitions */
148:
149: /* filesystem and partition information: */
150: u_short d_npartitions; /* number of partitions in following */
151: u_long d_bbsize; /* size of boot area at sn0, bytes */
152: u_long d_sbsize; /* max size of fs superblock, bytes */
153: struct partition { /* the partition table */
154: u_long p_size; /* number of sectors in partition */
155: u_long p_offset; /* starting sector */
156: u_long p_fsize; /* filesystem basic fragment size */
157: u_char p_fstype; /* filesystem type, see below */
158: u_char p_frag; /* filesystem fragments per block */
159: u_short p_cpg; /* filesystem cylinders per group */
160: } d_partitions[MAXPARTITIONS]; /* actually may be more */
161: };
162: #else LOCORE
163: /*
164: * offsets for asm boot files.
165: */
166: .set d_secsize,40
167: .set d_nsectors,44
168: .set d_ntracks,48
169: .set d_ncylinders,52
170: .set d_secpercyl,56
171: .set d_secperunit,60
172: .set d_end_,276 /* size of disk label */
173: #endif LOCORE
174:
175: /* d_type values: */
176: #define DTYPE_SMD 1 /* SMD, XSMD; VAX hp/up */
177: #define DTYPE_MSCP 2 /* MSCP */
178: #define DTYPE_DEC 3 /* other DEC (rk, rl) */
179: #define DTYPE_SCSI 4 /* SCSI */
180: #define DTYPE_ESDI 5 /* ESDI interface */
181: #define DTYPE_ST506 6 /* ST506 etc. */
182: #define DTYPE_FLOPPY 10 /* floppy */
183:
1.1.1.2 ! root 184: /* d_subtype values: */
! 185: #define DSTYPE_INDOSPART 0x8 /* is inside dos partition */
! 186: #define DSTYPE_DOSPART(s) ((s) & 3) /* dos partition number */
! 187: #define DSTYPE_GEOMETRY 0x10 /* drive params in label */
! 188:
1.1 root 189: #ifdef DKTYPENAMES
190: static char *dktypenames[] = {
191: "unknown",
192: "SMD",
193: "MSCP",
194: "old DEC",
195: "SCSI",
196: "ESDI",
197: "ST506",
198: "type 7",
199: "type 8",
200: "type 9",
201: "floppy",
202: 0
203: };
204: #define DKMAXTYPES (sizeof(dktypenames) / sizeof(dktypenames[0]) - 1)
205: #endif
206:
207: /*
208: * Filesystem type and version.
209: * Used to interpret other filesystem-specific
210: * per-partition information.
211: */
212: #define FS_UNUSED 0 /* unused */
213: #define FS_SWAP 1 /* swap */
214: #define FS_V6 2 /* Sixth Edition */
215: #define FS_V7 3 /* Seventh Edition */
216: #define FS_SYSV 4 /* System V */
217: #define FS_V71K 5 /* V7 with 1K blocks (4.1, 2.9) */
218: #define FS_V8 6 /* Eighth Edition, 4K blocks */
219: #define FS_BSDFFS 7 /* 4.2BSD fast file system */
220: #define FS_MSDOS 8 /* MSDOS file system */
221:
222: #ifdef DKTYPENAMES
223: static char *fstypenames[] = {
224: "unused",
225: "swap",
226: "Version 6",
227: "Version 7",
228: "System V",
229: "4.1BSD",
230: "Eighth Edition",
231: "4.2BSD",
232: "MSDOS",
233: 0
234: };
235: #define FSMAXTYPES (sizeof(fstypenames) / sizeof(fstypenames[0]) - 1)
236: #endif
237:
238: /*
239: * flags shared by various drives:
240: */
241: #define D_REMOVABLE 0x01 /* removable media */
242: #define D_ECC 0x02 /* supports ECC */
243: #define D_BADSECT 0x04 /* supports bad sector forw. */
244: #define D_RAMDISK 0x08 /* disk emulator */
245: #define D_CHAIN 0x10 /* can do back-back transfers */
1.1.1.2 ! root 246: #define D_DOSPART 0x20 /* within MSDOS partition */
1.1 root 247:
248: /*
249: * Drive data for SMD.
250: */
251: #define d_smdflags d_drivedata[0]
252: #define D_SSE 0x1 /* supports skip sectoring */
253: #define d_mindist d_drivedata[1]
254: #define d_maxdist d_drivedata[2]
255: #define d_sdist d_drivedata[3]
256:
257: /*
258: * Drive data for ST506.
259: */
260: #define d_precompcyl d_drivedata[0]
261: #define d_gap3 d_drivedata[1] /* used only when formatting */
262:
263: /*
264: * Drive data for SCSI.
265: */
266: #define d_blind d_drivedata[0]
267:
268: #ifndef LOCORE
269: /*
270: * Structure used to perform a format
271: * or other raw operation, returning data
272: * and/or register values.
273: * Register identification and format
274: * are device- and driver-dependent.
275: */
276: struct format_op {
277: char *df_buf;
278: int df_count; /* value-result */
279: daddr_t df_startblk;
280: int df_reg[8]; /* result */
281: };
282:
283: /*
284: * Structure used internally to retrieve
285: * information about a partition on a disk.
286: */
287: struct partinfo {
288: struct disklabel *disklab;
289: struct partition *part;
290: };
291:
1.1.1.2 ! root 292: /* DOS partition table -- located in boot block */
! 293:
! 294: #define DOSBBSECTOR 0 /* DOS boot block relative sector number */
! 295: #define DOSPARTOFF 446
! 296: #define NDOSPART 4
! 297:
! 298: struct dos_partition {
! 299: unsigned char dp_flag; /* bootstrap flags */
! 300: unsigned char dp_shd; /* starting head */
! 301: unsigned char dp_ssect; /* starting sector */
! 302: unsigned char dp_scyl; /* starting cylinder */
! 303: unsigned char dp_typ; /* partition type */
! 304: #define DOSPTYP_386BSD 0xa5 /* 386BSD partition type */
! 305: unsigned char dp_ehd; /* end head */
! 306: unsigned char dp_esect; /* end sector */
! 307: unsigned char dp_ecyl; /* end cylinder */
! 308: unsigned long dp_start; /* absolute starting sector number */
! 309: unsigned long dp_size; /* partition size in sectors */
! 310: } dos_partitions[NDOSPART];
! 311:
! 312: #define DPSECT(s) ((s) & 0x3f) /* isolate relevant bits of sector */
! 313: #define DPCYL(c, s) ((c) + (((s) & 0xc0)<<2)) /* and those that are cylinder */
! 314:
1.1 root 315: /*
316: * Disk-specific ioctls.
317: */
318: /* get and set disklabel; DIOCGPART used internally */
319: #define DIOCGDINFO _IOR('d', 101, struct disklabel)/* get */
320: #define DIOCSDINFO _IOW('d', 102, struct disklabel)/* set */
321: #define DIOCWDINFO _IOW('d', 103, struct disklabel)/* set, update disk */
322: #define DIOCGPART _IOW('d', 104, struct partinfo) /* get partition */
323:
324: /* do format operation, read or write */
325: #define DIOCRFORMAT _IOWR('d', 105, struct format_op)
326: #define DIOCWFORMAT _IOWR('d', 106, struct format_op)
327:
328: #define DIOCSSTEP _IOW('d', 107, int) /* set step rate */
329: #define DIOCSRETRIES _IOW('d', 108, int) /* set # of retries */
330: #define DIOCWLABEL _IOW('d', 109, int) /* write en/disable label */
331:
332: #define DIOCSBAD _IOW('d', 110, struct dkbad) /* set kernel dkbad */
333:
1.1.1.2 ! root 334: #if defined(KERNEL)
! 335:
! 336:
! 337: void diskerr(struct buf *, char *, char *, int, int, struct disklabel *);
! 338:
! 339: int dkcksum(struct disklabel *);
! 340:
! 341: int setdisklabel(struct disklabel *, struct disklabel *, u_long,
! 342: struct dos_partition *);
! 343:
! 344: char *readdisklabel(int, int (*)(), struct disklabel *,
! 345: struct dos_partition *, struct dkbad *, struct buf **);
! 346:
! 347: void disksort(struct buf *, struct buf *);
! 348:
! 349: int writedisklabel(int, int (*)(), struct disklabel *,
! 350: struct dos_partition *);
! 351:
! 352: int bounds_check_with_label(struct buf *, struct disklabel *, int);
! 353: #endif
1.1 root 354: #endif LOCORE
355:
356: #if !defined(KERNEL) && !defined(LOCORE)
357:
358: #include <sys/cdefs.h>
359:
360: __BEGIN_DECLS
361: struct disklabel *getdiskbyname __P((const char *));
362: __END_DECLS
363:
364: #endif
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