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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 | ||
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 | ||
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 */ | |
246 | #define D_DOSPART 0x20 /* within MSDOS partition */ | |
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 | ||
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 | ||
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 | ||
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 | |
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 |