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15637ed4 RG |
1 | /* |
2 | * Copyright (c) 1982, 1986, 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 | * @(#)ufs_disksubr.c 7.16 (Berkeley) 5/4/91 | |
34 | */ | |
35 | ||
36 | #include "param.h" | |
37 | #include "systm.h" | |
38 | #include "buf.h" | |
39 | #include "dkbad.h" | |
40 | #include "disklabel.h" | |
41 | #include "syslog.h" | |
42 | ||
43 | /* | |
44 | * Seek sort for disks. We depend on the driver | |
45 | * which calls us using b_resid as the current cylinder number. | |
46 | * | |
47 | * The argument dp structure holds a b_actf activity chain pointer | |
48 | * on which we keep two queues, sorted in ascending cylinder order. | |
49 | * The first queue holds those requests which are positioned after | |
50 | * the current cylinder (in the first request); the second holds | |
51 | * requests which came in after their cylinder number was passed. | |
52 | * Thus we implement a one way scan, retracting after reaching the | |
53 | * end of the drive to the first request on the second queue, | |
54 | * at which time it becomes the first queue. | |
55 | * | |
56 | * A one-way scan is natural because of the way UNIX read-ahead | |
57 | * blocks are allocated. | |
58 | */ | |
59 | ||
60 | #define b_cylin b_resid | |
61 | ||
62 | void | |
63 | disksort(dp, bp) | |
64 | register struct buf *dp, *bp; | |
65 | { | |
66 | register struct buf *ap; | |
67 | ||
68 | /* | |
69 | * If nothing on the activity queue, then | |
70 | * we become the only thing. | |
71 | */ | |
72 | ap = dp->b_actf; | |
73 | if(ap == NULL) { | |
74 | dp->b_actf = bp; | |
75 | dp->b_actl = bp; | |
76 | bp->av_forw = NULL; | |
77 | return; | |
78 | } | |
79 | /* | |
80 | * If we lie after the first (currently active) | |
81 | * request, then we must locate the second request list | |
82 | * and add ourselves to it. | |
83 | */ | |
84 | if (bp->b_cylin < ap->b_cylin) { | |
85 | while (ap->av_forw) { | |
86 | /* | |
87 | * Check for an ``inversion'' in the | |
88 | * normally ascending cylinder numbers, | |
89 | * indicating the start of the second request list. | |
90 | */ | |
91 | if (ap->av_forw->b_cylin < ap->b_cylin) { | |
92 | /* | |
93 | * Search the second request list | |
94 | * for the first request at a larger | |
95 | * cylinder number. We go before that; | |
96 | * if there is no such request, we go at end. | |
97 | */ | |
98 | do { | |
99 | if (bp->b_cylin < ap->av_forw->b_cylin) | |
100 | goto insert; | |
101 | if (bp->b_cylin == ap->av_forw->b_cylin && | |
102 | bp->b_blkno < ap->av_forw->b_blkno) | |
103 | goto insert; | |
104 | ap = ap->av_forw; | |
105 | } while (ap->av_forw); | |
106 | goto insert; /* after last */ | |
107 | } | |
108 | ap = ap->av_forw; | |
109 | } | |
110 | /* | |
111 | * No inversions... we will go after the last, and | |
112 | * be the first request in the second request list. | |
113 | */ | |
114 | goto insert; | |
115 | } | |
116 | /* | |
117 | * Request is at/after the current request... | |
118 | * sort in the first request list. | |
119 | */ | |
120 | while (ap->av_forw) { | |
121 | /* | |
122 | * We want to go after the current request | |
123 | * if there is an inversion after it (i.e. it is | |
124 | * the end of the first request list), or if | |
125 | * the next request is a larger cylinder than our request. | |
126 | */ | |
127 | if (ap->av_forw->b_cylin < ap->b_cylin || | |
128 | bp->b_cylin < ap->av_forw->b_cylin || | |
129 | (bp->b_cylin == ap->av_forw->b_cylin && | |
130 | bp->b_blkno < ap->av_forw->b_blkno)) | |
131 | goto insert; | |
132 | ap = ap->av_forw; | |
133 | } | |
134 | /* | |
135 | * Neither a second list nor a larger | |
136 | * request... we go at the end of the first list, | |
137 | * which is the same as the end of the whole schebang. | |
138 | */ | |
139 | insert: | |
140 | bp->av_forw = ap->av_forw; | |
141 | ap->av_forw = bp; | |
142 | if (ap == dp->b_actl) | |
143 | dp->b_actl = bp; | |
144 | } | |
145 | ||
146 | /* encoding of disk minor numbers, should be elsewhere... */ | |
147 | #define dkunit(dev) (minor(dev) >> 3) | |
148 | #define dkpart(dev) (minor(dev) & 7) | |
149 | #define dkminor(unit, part) (((unit) << 3) | (part)) | |
150 | ||
151 | /* | |
152 | * Attempt to read a disk label from a device | |
153 | * using the indicated stategy routine. | |
154 | * The label must be partly set up before this: | |
155 | * secpercyl, secsize and anything required for a block i/o read | |
156 | * operation in the driver's strategy/start routines | |
157 | * must be filled in before calling us. | |
158 | * | |
159 | * If dos partition table requested, attempt to load it and | |
160 | * find disklabel inside a DOS partition. Also, if bad block | |
161 | * table needed, attempt to extract it as well. Return buffer | |
162 | * for use in signalling errors if requested. | |
163 | * | |
164 | * Returns null on success and an error string on failure. | |
165 | */ | |
166 | char * | |
167 | readdisklabel(dev, strat, lp, dp, bdp, bpp) | |
168 | dev_t dev; | |
169 | int (*strat)(); | |
170 | register struct disklabel *lp; | |
171 | struct dos_partition *dp; | |
172 | struct dkbad *bdp; | |
173 | struct buf **bpp; | |
174 | { | |
175 | register struct buf *bp; | |
176 | struct disklabel *dlp; | |
177 | char *msg = NULL; | |
178 | int cyl, dospartoff, i; | |
179 | ||
180 | /* minimal requirements for archtypal disk label */ | |
181 | if (lp->d_secperunit == 0) | |
182 | lp->d_secperunit = 0x1fffffff; | |
183 | lp->d_npartitions = 1; | |
184 | if (lp->d_partitions[0].p_size == 0) | |
185 | lp->d_partitions[0].p_size = 0x1fffffff; | |
186 | lp->d_partitions[0].p_offset = 0; | |
187 | ||
188 | /* obtain buffer to probe drive with */ | |
189 | bp = geteblk((int)lp->d_secsize); | |
190 | ||
191 | /* request no partition relocation by driver on I/O operations */ | |
192 | bp->b_dev = makedev(major(dev), dkminor((dkunit(dev)), 3)); | |
193 | ||
194 | /* do dos partitions in the process of getting disklabel? */ | |
195 | dospartoff = 0; | |
196 | cyl = LABELSECTOR / lp->d_secpercyl; | |
197 | if (dp) { | |
198 | struct dos_partition *ap; | |
199 | ||
200 | /* read master boot record */ | |
201 | bp->b_blkno = DOSBBSECTOR; | |
202 | bp->b_bcount = lp->d_secsize; | |
203 | bp->b_flags = B_BUSY | B_READ; | |
204 | bp->b_cylin = DOSBBSECTOR / lp->d_secpercyl; | |
205 | (*strat)(bp); | |
206 | ||
207 | /* if successful, wander through dos partition table */ | |
208 | if (biowait(bp)) { | |
209 | msg = "dos partition I/O error"; | |
210 | goto done; | |
211 | } else { | |
212 | /* XXX how do we check veracity/bounds of this? */ | |
213 | bcopy(bp->b_un.b_addr + DOSPARTOFF, dp, | |
214 | NDOSPART * sizeof(*dp)); | |
215 | for (i = 0; i < NDOSPART; i++, dp++) | |
216 | /* is this ours? */ | |
217 | if (dp->dp_size && | |
218 | dp->dp_typ == DOSPTYP_386BSD | |
219 | && dospartoff == 0) { | |
220 | ||
221 | /* need sector address for SCSI/IDE, | |
222 | cylinder for ESDI/ST506/RLL */ | |
223 | dospartoff = dp->dp_start; | |
224 | cyl = DPCYL(dp->dp_scyl, dp->dp_ssect); | |
225 | ||
226 | /* update disklabel with details */ | |
227 | lp->d_partitions[0].p_size = | |
228 | dp->dp_size; | |
229 | lp->d_partitions[0].p_offset = | |
230 | dp->dp_start; | |
231 | lp->d_ntracks = dp->dp_ehd + 1; | |
232 | lp->d_nsectors = DPSECT(dp->dp_esect); | |
233 | lp->d_subtype |= (lp->d_subtype & 3) | |
234 | + i | DSTYPE_INDOSPART; | |
235 | lp->d_secpercyl = lp->d_ntracks * | |
236 | lp->d_nsectors; | |
237 | } | |
238 | } | |
239 | ||
240 | } | |
241 | ||
242 | /* next, dig out disk label */ | |
243 | bp->b_blkno = dospartoff + LABELSECTOR; | |
244 | bp->b_cylin = cyl; | |
245 | bp->b_bcount = lp->d_secsize; | |
246 | bp->b_flags = B_BUSY | B_READ; | |
247 | (*strat)(bp); | |
248 | ||
249 | /* if successful, locate disk label within block and validate */ | |
250 | if (biowait(bp)) { | |
251 | msg = "disk label I/O error"; | |
252 | goto done; | |
253 | } else for (dlp = (struct disklabel *)bp->b_un.b_addr; | |
254 | dlp <= (struct disklabel *)(bp->b_un.b_addr+DEV_BSIZE-sizeof(*dlp)); | |
255 | dlp = (struct disklabel *)((char *)dlp + sizeof(long))) { | |
256 | if (dlp->d_magic != DISKMAGIC || dlp->d_magic2 != DISKMAGIC) { | |
257 | if (msg == NULL) | |
258 | msg = "no disk label"; | |
259 | } else if (dlp->d_npartitions > MAXPARTITIONS || | |
260 | dkcksum(dlp) != 0) | |
261 | msg = "disk label corrupted"; | |
262 | else { | |
263 | *lp = *dlp; | |
264 | msg = NULL; | |
265 | break; | |
266 | } | |
267 | } | |
268 | ||
269 | if (msg) | |
270 | goto done; | |
271 | ||
272 | /* obtain bad sector table if requested and present */ | |
273 | if (bdp && (lp->d_flags & D_BADSECT)) { | |
274 | struct dkbad *db; | |
275 | ||
276 | i = 0; | |
277 | do { | |
278 | /* read a bad sector table */ | |
279 | bp->b_flags = B_BUSY | B_READ; | |
280 | bp->b_blkno = lp->d_secperunit - lp->d_nsectors + i; | |
281 | if (lp->d_secsize > DEV_BSIZE) | |
282 | bp->b_blkno *= lp->d_secsize / DEV_BSIZE; | |
283 | else | |
284 | bp->b_blkno /= DEV_BSIZE / lp->d_secsize; | |
285 | bp->b_bcount = lp->d_secsize; | |
286 | bp->b_cylin = lp->d_ncylinders - 1; | |
287 | (*strat)(bp); | |
288 | ||
289 | /* if successful, validate, otherwise try another */ | |
290 | if (biowait(bp)) { | |
291 | msg = "bad sector table I/O error"; | |
292 | } else { | |
293 | db = (struct dkbad *)(bp->b_un.b_addr); | |
294 | #define DKBAD_MAGIC 0x4321 | |
295 | if (db->bt_mbz == 0 | |
296 | && db->bt_flag == DKBAD_MAGIC) { | |
297 | msg = NULL; | |
298 | *bdp = *db; | |
299 | break; | |
300 | } else | |
301 | msg = "bad sector table corrupted"; | |
302 | } | |
303 | } while ((bp->b_flags & B_ERROR) && (i += 2) < 10 && | |
304 | i < lp->d_nsectors); | |
305 | } | |
306 | ||
307 | done: | |
308 | bp->b_flags = B_INVAL | B_AGE | B_READ; | |
309 | #ifndef old | |
310 | /* if desired, pass back allocated block so caller can use */ | |
311 | if (bpp) | |
312 | *bpp = bp; | |
313 | else | |
314 | #endif | |
315 | brelse(bp); | |
316 | return (msg); | |
317 | } | |
318 | ||
319 | /* | |
320 | * Check new disk label for sensibility | |
321 | * before setting it. | |
322 | */ | |
323 | setdisklabel(olp, nlp, openmask, dp) | |
324 | register struct disklabel *olp, *nlp; | |
325 | u_long openmask; | |
326 | struct dos_partition *dp; | |
327 | { | |
328 | register i; | |
329 | register struct partition *opp, *npp; | |
330 | ||
331 | /* sanity clause */ | |
332 | if (nlp->d_secpercyl == 0 || nlp->d_secsize == 0 | |
333 | || (nlp->d_secsize % DEV_BSIZE) != 0) | |
334 | return(EINVAL); | |
335 | ||
336 | /* special case to allow disklabel to be invalidated */ | |
337 | if (nlp->d_magic == 0xffffffff) { | |
338 | *olp = *nlp; | |
339 | return (0); | |
340 | } | |
341 | ||
342 | if (nlp->d_magic != DISKMAGIC || nlp->d_magic2 != DISKMAGIC || | |
343 | dkcksum(nlp) != 0) | |
344 | return (EINVAL); | |
345 | ||
346 | /* XXX missing check if other dos partitions will be overwritten */ | |
347 | ||
348 | while ((i = ffs((long)openmask)) != 0) { | |
349 | i--; | |
350 | openmask &= ~(1 << i); | |
351 | if (nlp->d_npartitions <= i) | |
352 | return (EBUSY); | |
353 | opp = &olp->d_partitions[i]; | |
354 | npp = &nlp->d_partitions[i]; | |
355 | if (npp->p_offset != opp->p_offset || npp->p_size < opp->p_size) | |
356 | return (EBUSY); | |
357 | /* | |
358 | * Copy internally-set partition information | |
359 | * if new label doesn't include it. XXX | |
360 | */ | |
361 | if (npp->p_fstype == FS_UNUSED && opp->p_fstype != FS_UNUSED) { | |
362 | npp->p_fstype = opp->p_fstype; | |
363 | npp->p_fsize = opp->p_fsize; | |
364 | npp->p_frag = opp->p_frag; | |
365 | npp->p_cpg = opp->p_cpg; | |
366 | } | |
367 | } | |
368 | nlp->d_checksum = 0; | |
369 | nlp->d_checksum = dkcksum(nlp); | |
370 | *olp = *nlp; | |
371 | return (0); | |
372 | } | |
373 | ||
374 | ||
375 | /* | |
376 | * Write disk label back to device after modification. | |
377 | */ | |
378 | writedisklabel(dev, strat, lp, dp) | |
379 | dev_t dev; | |
380 | int (*strat)(); | |
381 | register struct disklabel *lp; | |
382 | struct dos_partition *dp; | |
383 | { | |
384 | struct buf *bp; | |
385 | struct disklabel *dlp; | |
386 | int labelpart, error = 0, dospartoff, cyl, i; | |
387 | ||
388 | labelpart = dkpart(dev); | |
389 | #ifdef nope | |
390 | if (lp->d_partitions[labelpart].p_offset != 0) { | |
391 | if (lp->d_partitions[0].p_offset != 0) | |
392 | return (EXDEV); /* not quite right */ | |
393 | labelpart = 0; | |
394 | } | |
395 | #else | |
396 | labelpart = 3; | |
397 | #endif | |
398 | ||
399 | bp = geteblk((int)lp->d_secsize); | |
400 | /* request no partition relocation by driver on I/O operations */ | |
401 | bp->b_dev = makedev(major(dev), dkminor((dkunit(dev)), 3)); | |
402 | ||
403 | /* do dos partitions in the process of getting disklabel? */ | |
404 | dospartoff = 0; | |
405 | cyl = LABELSECTOR / lp->d_secpercyl; | |
406 | if (dp) { | |
407 | bp->b_blkno = DOSBBSECTOR; | |
408 | bp->b_bcount = lp->d_secsize; | |
409 | bp->b_flags = B_BUSY | B_READ; | |
410 | bp->b_cylin = DOSBBSECTOR / lp->d_secpercyl; | |
411 | (*strat)(bp); | |
412 | if ((error = biowait(bp)) == 0) { | |
413 | bcopy(bp->b_un.b_addr + DOSPARTOFF, dp, | |
414 | NDOSPART * sizeof(*dp)); | |
415 | for (i = 0; i < NDOSPART; i++, dp++) | |
416 | if(dp->dp_size && dp->dp_typ == DOSPTYP_386BSD | |
417 | && dospartoff == 0) { | |
418 | /* need sector address for SCSI/IDE, | |
419 | cylinder for ESDI/ST506/RLL */ | |
420 | dospartoff = dp->dp_start; | |
421 | cyl = dp->dp_scyl | | |
422 | ((dp->dp_ssect & 0xc0) << 2); | |
423 | } | |
424 | } | |
425 | ||
426 | } | |
427 | ||
428 | #ifdef maybe | |
429 | /* disklabel in appropriate location? */ | |
430 | if (lp->d_partitions[0].p_offset != 0 | |
431 | && lp->d_partitions[0].p_offset != dospartoff) { | |
432 | error = EXDEV; | |
433 | goto done; | |
434 | } | |
435 | #endif | |
436 | ||
437 | bp->b_blkno = dospartoff + LABELSECTOR; | |
438 | bp->b_cylin = cyl; | |
439 | bp->b_bcount = lp->d_secsize; | |
440 | bp->b_flags = B_READ; | |
441 | (*strat)(bp); | |
442 | if (error = biowait(bp)) | |
443 | goto done; | |
444 | for (dlp = (struct disklabel *)bp->b_un.b_addr; | |
445 | dlp <= (struct disklabel *) | |
446 | (bp->b_un.b_addr + lp->d_secsize - sizeof(*dlp)); | |
447 | dlp = (struct disklabel *)((char *)dlp + sizeof(long))) { | |
448 | if (dlp->d_magic == DISKMAGIC && dlp->d_magic2 == DISKMAGIC && | |
449 | dkcksum(dlp) == 0) { | |
450 | *dlp = *lp; | |
451 | bp->b_flags = B_WRITE; | |
452 | (*strat)(bp); | |
453 | error = biowait(bp); | |
454 | goto done; | |
455 | } | |
456 | } | |
457 | error = ESRCH; | |
458 | done: | |
459 | brelse(bp); | |
460 | return (error); | |
461 | } | |
462 | ||
463 | /* | |
464 | * Compute checksum for disk label. | |
465 | */ | |
466 | dkcksum(lp) | |
467 | register struct disklabel *lp; | |
468 | { | |
469 | register u_short *start, *end; | |
470 | register u_short sum = 0; | |
471 | ||
472 | start = (u_short *)lp; | |
473 | end = (u_short *)&lp->d_partitions[lp->d_npartitions]; | |
474 | while (start < end) | |
475 | sum ^= *start++; | |
476 | return (sum); | |
477 | } | |
478 | ||
479 | /* | |
480 | * Determine the size of the transfer, and make sure it is | |
481 | * within the boundaries of the partition. Adjust transfer | |
482 | * if needed, and signal errors or early completion. | |
483 | */ | |
484 | int | |
485 | bounds_check_with_label(struct buf *bp, struct disklabel *lp, int wlabel) | |
486 | { | |
487 | struct partition *p = lp->d_partitions + dkpart(bp->b_dev); | |
488 | int labelsect = lp->d_partitions[0].p_offset; | |
489 | int maxsz = p->p_size, | |
490 | sz = (bp->b_bcount + DEV_BSIZE - 1) >> DEV_BSHIFT; | |
491 | ||
492 | /* overwriting disk label ? */ | |
493 | /* XXX should also protect bootstrap in first 8K */ | |
494 | if (bp->b_blkno + p->p_offset <= LABELSECTOR + labelsect && | |
495 | #if LABELSECTOR != 0 | |
496 | bp->b_blkno + p->p_offset + sz > LABELSECTOR + labelsect && | |
497 | #endif | |
498 | (bp->b_flags & B_READ) == 0 && wlabel == 0) { | |
499 | bp->b_error = EROFS; | |
500 | goto bad; | |
501 | } | |
502 | ||
503 | #if defined(DOSBBSECTOR) && defined(notyet) | |
504 | /* overwriting master boot record? */ | |
505 | if (bp->b_blkno + p->p_offset <= DOSBBSECTOR && | |
506 | (bp->b_flags & B_READ) == 0 && wlabel == 0) { | |
507 | bp->b_error = EROFS; | |
508 | goto bad; | |
509 | } | |
510 | #endif | |
511 | ||
512 | /* beyond partition? */ | |
513 | if (bp->b_blkno < 0 || bp->b_blkno + sz > maxsz) { | |
514 | /* if exactly at end of disk, return an EOF */ | |
515 | if (bp->b_blkno == maxsz) { | |
516 | bp->b_resid = bp->b_bcount; | |
517 | return(0); | |
518 | } | |
519 | /* or truncate if part of it fits */ | |
520 | sz = maxsz - bp->b_blkno; | |
521 | if (sz <= 0) { | |
522 | bp->b_error = EINVAL; | |
523 | goto bad; | |
524 | } | |
525 | bp->b_bcount = sz << DEV_BSHIFT; | |
526 | } | |
527 | ||
528 | /* calculate cylinder for disksort to order transfers with */ | |
529 | bp->b_cylin = (bp->b_blkno + p->p_offset) / lp->d_secpercyl; | |
530 | return(1); | |
531 | ||
532 | bad: | |
533 | bp->b_flags |= B_ERROR; | |
534 | return(-1); | |
535 | } | |
536 | ||
537 | /* | |
538 | * Disk error is the preface to plaintive error messages | |
539 | * about failing disk transfers. It prints messages of the form | |
540 | ||
541 | hp0g: hard error reading fsbn 12345 of 12344-12347 (hp0 bn %d cn %d tn %d sn %d) | |
542 | ||
543 | * if the offset of the error in the transfer and a disk label | |
544 | * are both available. blkdone should be -1 if the position of the error | |
545 | * is unknown; the disklabel pointer may be null from drivers that have not | |
546 | * been converted to use them. The message is printed with printf | |
547 | * if pri is LOG_PRINTF, otherwise it uses log at the specified priority. | |
548 | * The message should be completed (with at least a newline) with printf | |
549 | * or addlog, respectively. There is no trailing space. | |
550 | */ | |
551 | void | |
552 | diskerr(bp, dname, what, pri, blkdone, lp) | |
553 | register struct buf *bp; | |
554 | char *dname, *what; | |
555 | int pri, blkdone; | |
556 | register struct disklabel *lp; | |
557 | { | |
558 | int unit = dkunit(bp->b_dev), part = dkpart(bp->b_dev); | |
559 | register void (*pr) __P((const char *, ...)); | |
560 | char partname = 'a' + part; | |
561 | int sn; | |
562 | ||
563 | if (pri != LOG_PRINTF) { | |
564 | log(pri, ""); | |
565 | pr = addlog; | |
566 | } else | |
567 | pr = printf; | |
568 | (*pr)("%s%d%c: %s %sing fsbn ", dname, unit, partname, what, | |
569 | bp->b_flags & B_READ ? "read" : "writ"); | |
570 | sn = bp->b_blkno; | |
571 | if (bp->b_bcount <= DEV_BSIZE) | |
572 | (*pr)("%d", sn); | |
573 | else { | |
574 | if (blkdone >= 0) { | |
575 | sn += blkdone; | |
576 | (*pr)("%d of ", sn); | |
577 | } | |
578 | (*pr)("%d-%d", bp->b_blkno, | |
579 | bp->b_blkno + (bp->b_bcount - 1) / DEV_BSIZE); | |
580 | } | |
581 | if (lp && (blkdone >= 0 || bp->b_bcount <= lp->d_secsize)) { | |
582 | #ifdef tahoe | |
583 | sn *= DEV_BSIZE / lp->d_secsize; /* XXX */ | |
584 | #endif | |
585 | sn += lp->d_partitions[part].p_offset; | |
586 | (*pr)(" (%s%d bn %d; cn %d", dname, unit, sn, | |
587 | sn / lp->d_secpercyl); | |
588 | sn %= lp->d_secpercyl; | |
589 | (*pr)(" tn %d sn %d)", sn / lp->d_nsectors, sn % lp->d_nsectors); | |
590 | } | |
591 | } |