1 /*-
2 * Copyright (c) 2002 Poul-Henning Kamp
3 * Copyright (c) 2002 Networks Associates Technology, Inc.
4 * All rights reserved.
5 *
6 * This software was developed for the FreeBSD Project by Poul-Henning Kamp
7 * and NAI Labs, the Security Research Division of Network Associates, Inc.
8 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
9 * DARPA CHATS research program.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. The names of the authors may not be used to endorse or promote
20 * products derived from this software without specific prior written
21 * permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
38
39 #include "opt_geom.h"
40
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/kernel.h>
44 #include <sys/sysctl.h>
45 #include <sys/bio.h>
46 #include <sys/bus.h>
47 #include <sys/ctype.h>
48 #include <sys/fcntl.h>
49 #include <sys/malloc.h>
50 #include <sys/sbuf.h>
51 #include <sys/devicestat.h>
52 #include <machine/md_var.h>
53
54 #include <sys/lock.h>
55 #include <sys/mutex.h>
56 #include <geom/geom.h>
57 #include <geom/geom_disk.h>
58 #include <geom/geom_int.h>
59
60 #include <dev/led/led.h>
61
62 #include <machine/bus.h>
63
64 struct g_disk_softc {
65 struct mtx done_mtx;
66 struct disk *dp;
67 struct devstat *d_devstat;
68 struct sysctl_ctx_list sysctl_ctx;
69 struct sysctl_oid *sysctl_tree;
70 char led[64];
71 uint32_t state;
72 struct mtx start_mtx;
73 };
74
75 static g_access_t g_disk_access;
76 static g_start_t g_disk_start;
77 static g_ioctl_t g_disk_ioctl;
78 static g_dumpconf_t g_disk_dumpconf;
79 static g_provgone_t g_disk_providergone;
80
81 static struct g_class g_disk_class = {
82 .name = G_DISK_CLASS_NAME,
83 .version = G_VERSION,
84 .start = g_disk_start,
85 .access = g_disk_access,
86 .ioctl = g_disk_ioctl,
87 .providergone = g_disk_providergone,
88 .dumpconf = g_disk_dumpconf,
89 };
90
91 SYSCTL_DECL(_kern_geom);
92 static SYSCTL_NODE(_kern_geom, OID_AUTO, disk, CTLFLAG_RW, 0,
93 "GEOM_DISK stuff");
94
95 DECLARE_GEOM_CLASS(g_disk_class, g_disk);
96
97 static int
g_disk_access(struct g_provider * pp,int r,int w,int e)98 g_disk_access(struct g_provider *pp, int r, int w, int e)
99 {
100 struct disk *dp;
101 struct g_disk_softc *sc;
102 int error;
103
104 g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)",
105 pp->name, r, w, e);
106 g_topology_assert();
107 sc = pp->private;
108 if (sc == NULL || (dp = sc->dp) == NULL || dp->d_destroyed) {
109 /*
110 * Allow decreasing access count even if disk is not
111 * available anymore.
112 */
113 if (r <= 0 && w <= 0 && e <= 0)
114 return (0);
115 return (ENXIO);
116 }
117 r += pp->acr;
118 w += pp->acw;
119 e += pp->ace;
120 error = 0;
121 if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) {
122 /*
123 * It would be better to defer this decision to d_open if
124 * it was able to take flags.
125 */
126 if (w > 0 && (dp->d_flags & DISKFLAG_WRITE_PROTECT) != 0)
127 error = EROFS;
128 if (error == 0 && dp->d_open != NULL)
129 error = dp->d_open(dp);
130 if (bootverbose && error != 0)
131 printf("Opened disk %s -> %d\n", pp->name, error);
132 if (error != 0)
133 return (error);
134 pp->sectorsize = dp->d_sectorsize;
135 if (dp->d_maxsize == 0) {
136 printf("WARNING: Disk drive %s%d has no d_maxsize\n",
137 dp->d_name, dp->d_unit);
138 dp->d_maxsize = DFLTPHYS;
139 }
140 if (dp->d_delmaxsize == 0) {
141 if (bootverbose && dp->d_flags & DISKFLAG_CANDELETE) {
142 printf("WARNING: Disk drive %s%d has no "
143 "d_delmaxsize\n", dp->d_name, dp->d_unit);
144 }
145 dp->d_delmaxsize = dp->d_maxsize;
146 }
147 pp->stripeoffset = dp->d_stripeoffset;
148 pp->stripesize = dp->d_stripesize;
149 dp->d_flags |= DISKFLAG_OPEN;
150 /*
151 * Do not invoke resize event when initial size was zero.
152 * Some disks report its size only after first opening.
153 */
154 if (pp->mediasize == 0)
155 pp->mediasize = dp->d_mediasize;
156 else
157 g_resize_provider(pp, dp->d_mediasize);
158 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) {
159 if (dp->d_close != NULL) {
160 error = dp->d_close(dp);
161 if (error != 0)
162 printf("Closed disk %s -> %d\n",
163 pp->name, error);
164 }
165 sc->state = G_STATE_ACTIVE;
166 if (sc->led[0] != 0)
167 led_set(sc->led, "0");
168 dp->d_flags &= ~DISKFLAG_OPEN;
169 }
170 return (error);
171 }
172
173 static void
g_disk_kerneldump(struct bio * bp,struct disk * dp)174 g_disk_kerneldump(struct bio *bp, struct disk *dp)
175 {
176 struct g_kerneldump *gkd;
177 struct g_geom *gp;
178
179 gkd = (struct g_kerneldump*)bp->bio_data;
180 gp = bp->bio_to->geom;
181 g_trace(G_T_TOPOLOGY, "g_disk_kerneldump(%s, %jd, %jd)",
182 gp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length);
183 if (dp->d_dump == NULL) {
184 g_io_deliver(bp, ENODEV);
185 return;
186 }
187 gkd->di.dumper = dp->d_dump;
188 gkd->di.priv = dp;
189 gkd->di.blocksize = dp->d_sectorsize;
190 gkd->di.maxiosize = dp->d_maxsize;
191 gkd->di.mediaoffset = gkd->offset;
192 if ((gkd->offset + gkd->length) > dp->d_mediasize)
193 gkd->length = dp->d_mediasize - gkd->offset;
194 gkd->di.mediasize = gkd->length;
195 g_io_deliver(bp, 0);
196 }
197
198 static void
g_disk_setstate(struct bio * bp,struct g_disk_softc * sc)199 g_disk_setstate(struct bio *bp, struct g_disk_softc *sc)
200 {
201 const char *cmd;
202
203 memcpy(&sc->state, bp->bio_data, sizeof(sc->state));
204 if (sc->led[0] != 0) {
205 switch (sc->state) {
206 case G_STATE_FAILED:
207 cmd = "1";
208 break;
209 case G_STATE_REBUILD:
210 cmd = "f5";
211 break;
212 case G_STATE_RESYNC:
213 cmd = "f1";
214 break;
215 default:
216 cmd = "0";
217 break;
218 }
219 led_set(sc->led, cmd);
220 }
221 g_io_deliver(bp, 0);
222 }
223
224 static void
g_disk_done(struct bio * bp)225 g_disk_done(struct bio *bp)
226 {
227 struct bintime now;
228 struct bio *bp2;
229 struct g_disk_softc *sc;
230
231 /* See "notes" for why we need a mutex here */
232 sc = bp->bio_caller1;
233 bp2 = bp->bio_parent;
234 binuptime(&now);
235 mtx_lock(&sc->done_mtx);
236 if (bp2->bio_error == 0)
237 bp2->bio_error = bp->bio_error;
238 bp2->bio_completed += bp->bio_length - bp->bio_resid;
239
240 switch (bp->bio_cmd) {
241 case BIO_ZONE:
242 bcopy(&bp->bio_zone, &bp2->bio_zone, sizeof(bp->bio_zone));
243 /*FALLTHROUGH*/
244 case BIO_READ:
245 case BIO_WRITE:
246 case BIO_DELETE:
247 case BIO_FLUSH:
248 devstat_end_transaction_bio_bt(sc->d_devstat, bp, &now);
249 break;
250 default:
251 break;
252 }
253 bp2->bio_inbed++;
254 if (bp2->bio_children == bp2->bio_inbed) {
255 mtx_unlock(&sc->done_mtx);
256 bp2->bio_resid = bp2->bio_bcount - bp2->bio_completed;
257 g_io_deliver(bp2, bp2->bio_error);
258 } else
259 mtx_unlock(&sc->done_mtx);
260 g_destroy_bio(bp);
261 }
262
263 static int
g_disk_ioctl(struct g_provider * pp,u_long cmd,void * data,int fflag,struct thread * td)264 g_disk_ioctl(struct g_provider *pp, u_long cmd, void * data, int fflag, struct thread *td)
265 {
266 struct disk *dp;
267 struct g_disk_softc *sc;
268 int error;
269
270 sc = pp->private;
271 dp = sc->dp;
272
273 if (dp->d_ioctl == NULL)
274 return (ENOIOCTL);
275 error = dp->d_ioctl(dp, cmd, data, fflag, td);
276 return (error);
277 }
278
279 static off_t
g_disk_maxsize(struct disk * dp,struct bio * bp)280 g_disk_maxsize(struct disk *dp, struct bio *bp)
281 {
282 if (bp->bio_cmd == BIO_DELETE)
283 return (dp->d_delmaxsize);
284 return (dp->d_maxsize);
285 }
286
287 static int
g_disk_maxsegs(struct disk * dp,struct bio * bp)288 g_disk_maxsegs(struct disk *dp, struct bio *bp)
289 {
290 return ((g_disk_maxsize(dp, bp) / PAGE_SIZE) + 1);
291 }
292
293 static void
g_disk_advance(struct disk * dp,struct bio * bp,off_t off)294 g_disk_advance(struct disk *dp, struct bio *bp, off_t off)
295 {
296
297 bp->bio_offset += off;
298 bp->bio_length -= off;
299
300 if ((bp->bio_flags & BIO_VLIST) != 0) {
301 bus_dma_segment_t *seg, *end;
302
303 seg = (bus_dma_segment_t *)bp->bio_data;
304 end = (bus_dma_segment_t *)bp->bio_data + bp->bio_ma_n;
305 off += bp->bio_ma_offset;
306 while (off >= seg->ds_len) {
307 KASSERT((seg != end),
308 ("vlist request runs off the end"));
309 off -= seg->ds_len;
310 seg++;
311 }
312 bp->bio_ma_offset = off;
313 bp->bio_ma_n = end - seg;
314 bp->bio_data = (void *)seg;
315 } else if ((bp->bio_flags & BIO_UNMAPPED) != 0) {
316 bp->bio_ma += off / PAGE_SIZE;
317 bp->bio_ma_offset += off;
318 bp->bio_ma_offset %= PAGE_SIZE;
319 bp->bio_ma_n -= off / PAGE_SIZE;
320 } else {
321 bp->bio_data += off;
322 }
323 }
324
325 static void
g_disk_seg_limit(bus_dma_segment_t * seg,off_t * poffset,off_t * plength,int * ppages)326 g_disk_seg_limit(bus_dma_segment_t *seg, off_t *poffset,
327 off_t *plength, int *ppages)
328 {
329 uintptr_t seg_page_base;
330 uintptr_t seg_page_end;
331 off_t offset;
332 off_t length;
333 int seg_pages;
334
335 offset = *poffset;
336 length = *plength;
337
338 if (length > seg->ds_len - offset)
339 length = seg->ds_len - offset;
340
341 seg_page_base = trunc_page(seg->ds_addr + offset);
342 seg_page_end = round_page(seg->ds_addr + offset + length);
343 seg_pages = (seg_page_end - seg_page_base) >> PAGE_SHIFT;
344
345 if (seg_pages > *ppages) {
346 seg_pages = *ppages;
347 length = (seg_page_base + (seg_pages << PAGE_SHIFT)) -
348 (seg->ds_addr + offset);
349 }
350
351 *poffset = 0;
352 *plength -= length;
353 *ppages -= seg_pages;
354 }
355
356 static off_t
g_disk_vlist_limit(struct disk * dp,struct bio * bp,bus_dma_segment_t ** pendseg)357 g_disk_vlist_limit(struct disk *dp, struct bio *bp, bus_dma_segment_t **pendseg)
358 {
359 bus_dma_segment_t *seg, *end;
360 off_t residual;
361 off_t offset;
362 int pages;
363
364 seg = (bus_dma_segment_t *)bp->bio_data;
365 end = (bus_dma_segment_t *)bp->bio_data + bp->bio_ma_n;
366 residual = bp->bio_length;
367 offset = bp->bio_ma_offset;
368 pages = g_disk_maxsegs(dp, bp);
369 while (residual != 0 && pages != 0) {
370 KASSERT((seg != end),
371 ("vlist limit runs off the end"));
372 g_disk_seg_limit(seg, &offset, &residual, &pages);
373 seg++;
374 }
375 if (pendseg != NULL)
376 *pendseg = seg;
377 return (residual);
378 }
379
380 static bool
g_disk_limit(struct disk * dp,struct bio * bp)381 g_disk_limit(struct disk *dp, struct bio *bp)
382 {
383 bool limited = false;
384 off_t maxsz;
385
386 maxsz = g_disk_maxsize(dp, bp);
387
388 /*
389 * XXX: If we have a stripesize we should really use it here.
390 * Care should be taken in the delete case if this is done
391 * as deletes can be very sensitive to size given how they
392 * are processed.
393 */
394 if (bp->bio_length > maxsz) {
395 bp->bio_length = maxsz;
396 limited = true;
397 }
398
399 if ((bp->bio_flags & BIO_VLIST) != 0) {
400 bus_dma_segment_t *firstseg, *endseg;
401 off_t residual;
402
403 firstseg = (bus_dma_segment_t*)bp->bio_data;
404 residual = g_disk_vlist_limit(dp, bp, &endseg);
405 if (residual != 0) {
406 bp->bio_ma_n = endseg - firstseg;
407 bp->bio_length -= residual;
408 limited = true;
409 }
410 } else if ((bp->bio_flags & BIO_UNMAPPED) != 0) {
411 bp->bio_ma_n =
412 howmany(bp->bio_ma_offset + bp->bio_length, PAGE_SIZE);
413 }
414
415 return (limited);
416 }
417
418 static void
g_disk_start(struct bio * bp)419 g_disk_start(struct bio *bp)
420 {
421 struct bio *bp2, *bp3;
422 struct disk *dp;
423 struct g_disk_softc *sc;
424 int error;
425 off_t off;
426
427 sc = bp->bio_to->private;
428 if (sc == NULL || (dp = sc->dp) == NULL || dp->d_destroyed) {
429 g_io_deliver(bp, ENXIO);
430 return;
431 }
432 error = EJUSTRETURN;
433 switch(bp->bio_cmd) {
434 case BIO_DELETE:
435 if (!(dp->d_flags & DISKFLAG_CANDELETE)) {
436 error = EOPNOTSUPP;
437 break;
438 }
439 /* fall-through */
440 case BIO_READ:
441 case BIO_WRITE:
442 KASSERT((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0 ||
443 (bp->bio_flags & BIO_UNMAPPED) == 0,
444 ("unmapped bio not supported by disk %s", dp->d_name));
445 off = 0;
446 bp3 = NULL;
447 bp2 = g_clone_bio(bp);
448 if (bp2 == NULL) {
449 error = ENOMEM;
450 break;
451 }
452 for (;;) {
453 if (g_disk_limit(dp, bp2)) {
454 off += bp2->bio_length;
455
456 /*
457 * To avoid a race, we need to grab the next bio
458 * before we schedule this one. See "notes".
459 */
460 bp3 = g_clone_bio(bp);
461 if (bp3 == NULL)
462 bp->bio_error = ENOMEM;
463 }
464 bp2->bio_done = g_disk_done;
465 bp2->bio_caller1 = sc;
466 bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize;
467 bp2->bio_bcount = bp2->bio_length;
468 bp2->bio_disk = dp;
469 mtx_lock(&sc->start_mtx);
470 devstat_start_transaction_bio(dp->d_devstat, bp2);
471 mtx_unlock(&sc->start_mtx);
472 dp->d_strategy(bp2);
473
474 if (bp3 == NULL)
475 break;
476
477 bp2 = bp3;
478 bp3 = NULL;
479 g_disk_advance(dp, bp2, off);
480 }
481 break;
482 case BIO_GETATTR:
483 /* Give the driver a chance to override */
484 if (dp->d_getattr != NULL) {
485 if (bp->bio_disk == NULL)
486 bp->bio_disk = dp;
487 error = dp->d_getattr(bp);
488 if (error != -1)
489 break;
490 error = EJUSTRETURN;
491 }
492 if (g_handleattr_int(bp, "GEOM::candelete",
493 (dp->d_flags & DISKFLAG_CANDELETE) != 0))
494 break;
495 else if (g_handleattr_int(bp, "GEOM::fwsectors",
496 dp->d_fwsectors))
497 break;
498 else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads))
499 break;
500 else if (g_handleattr_off_t(bp, "GEOM::frontstuff", 0))
501 break;
502 else if (g_handleattr_str(bp, "GEOM::ident", dp->d_ident))
503 break;
504 else if (g_handleattr_str(bp, "GEOM::descr", dp->d_descr))
505 break;
506 else if (g_handleattr_uint16_t(bp, "GEOM::hba_vendor",
507 dp->d_hba_vendor))
508 break;
509 else if (g_handleattr_uint16_t(bp, "GEOM::hba_device",
510 dp->d_hba_device))
511 break;
512 else if (g_handleattr_uint16_t(bp, "GEOM::hba_subvendor",
513 dp->d_hba_subvendor))
514 break;
515 else if (g_handleattr_uint16_t(bp, "GEOM::hba_subdevice",
516 dp->d_hba_subdevice))
517 break;
518 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump"))
519 g_disk_kerneldump(bp, dp);
520 else if (!strcmp(bp->bio_attribute, "GEOM::setstate"))
521 g_disk_setstate(bp, sc);
522 else if (g_handleattr_uint16_t(bp, "GEOM::rotation_rate",
523 dp->d_rotation_rate))
524 break;
525 else
526 error = ENOIOCTL;
527 break;
528 case BIO_FLUSH:
529 g_trace(G_T_BIO, "g_disk_flushcache(%s)",
530 bp->bio_to->name);
531 if (!(dp->d_flags & DISKFLAG_CANFLUSHCACHE)) {
532 error = EOPNOTSUPP;
533 break;
534 }
535 /*FALLTHROUGH*/
536 case BIO_ZONE:
537 if (bp->bio_cmd == BIO_ZONE) {
538 if (!(dp->d_flags & DISKFLAG_CANZONE)) {
539 error = EOPNOTSUPP;
540 break;
541 }
542 g_trace(G_T_BIO, "g_disk_zone(%s)",
543 bp->bio_to->name);
544 }
545 bp2 = g_clone_bio(bp);
546 if (bp2 == NULL) {
547 g_io_deliver(bp, ENOMEM);
548 return;
549 }
550 bp2->bio_done = g_disk_done;
551 bp2->bio_caller1 = sc;
552 bp2->bio_disk = dp;
553 mtx_lock(&sc->start_mtx);
554 devstat_start_transaction_bio(dp->d_devstat, bp2);
555 mtx_unlock(&sc->start_mtx);
556 dp->d_strategy(bp2);
557 break;
558 default:
559 error = EOPNOTSUPP;
560 break;
561 }
562 if (error != EJUSTRETURN)
563 g_io_deliver(bp, error);
564 return;
565 }
566
567 static void
g_disk_dumpconf(struct sbuf * sb,const char * indent,struct g_geom * gp,struct g_consumer * cp,struct g_provider * pp)568 g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp)
569 {
570 struct bio *bp;
571 struct disk *dp;
572 struct g_disk_softc *sc;
573 char *buf;
574 int res = 0;
575
576 sc = gp->softc;
577 if (sc == NULL || (dp = sc->dp) == NULL)
578 return;
579 if (indent == NULL) {
580 sbuf_printf(sb, " hd %u", dp->d_fwheads);
581 sbuf_printf(sb, " sc %u", dp->d_fwsectors);
582 return;
583 }
584 if (pp != NULL) {
585 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n",
586 indent, dp->d_fwheads);
587 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n",
588 indent, dp->d_fwsectors);
589
590 /*
591 * "rotationrate" is a little complicated, because the value
592 * returned by the drive might not be the RPM; 0 and 1 are
593 * special cases, and there's also a valid range.
594 */
595 sbuf_printf(sb, "%s<rotationrate>", indent);
596 if (dp->d_rotation_rate == DISK_RR_UNKNOWN) /* Old drives */
597 sbuf_printf(sb, "unknown"); /* don't report RPM. */
598 else if (dp->d_rotation_rate == DISK_RR_NON_ROTATING)
599 sbuf_printf(sb, "0");
600 else if ((dp->d_rotation_rate >= DISK_RR_MIN) &&
601 (dp->d_rotation_rate <= DISK_RR_MAX))
602 sbuf_printf(sb, "%u", dp->d_rotation_rate);
603 else
604 sbuf_printf(sb, "invalid");
605 sbuf_printf(sb, "</rotationrate>\n");
606 if (dp->d_getattr != NULL) {
607 buf = g_malloc(DISK_IDENT_SIZE, M_WAITOK);
608 bp = g_alloc_bio();
609 bp->bio_disk = dp;
610 bp->bio_attribute = "GEOM::ident";
611 bp->bio_length = DISK_IDENT_SIZE;
612 bp->bio_data = buf;
613 res = dp->d_getattr(bp);
614 sbuf_printf(sb, "%s<ident>", indent);
615 g_conf_printf_escaped(sb, "%s",
616 res == 0 ? buf: dp->d_ident);
617 sbuf_printf(sb, "</ident>\n");
618 bp->bio_attribute = "GEOM::lunid";
619 bp->bio_length = DISK_IDENT_SIZE;
620 bp->bio_data = buf;
621 if (dp->d_getattr(bp) == 0) {
622 sbuf_printf(sb, "%s<lunid>", indent);
623 g_conf_printf_escaped(sb, "%s", buf);
624 sbuf_printf(sb, "</lunid>\n");
625 }
626 bp->bio_attribute = "GEOM::lunname";
627 bp->bio_length = DISK_IDENT_SIZE;
628 bp->bio_data = buf;
629 if (dp->d_getattr(bp) == 0) {
630 sbuf_printf(sb, "%s<lunname>", indent);
631 g_conf_printf_escaped(sb, "%s", buf);
632 sbuf_printf(sb, "</lunname>\n");
633 }
634 g_destroy_bio(bp);
635 g_free(buf);
636 } else {
637 sbuf_printf(sb, "%s<ident>", indent);
638 g_conf_printf_escaped(sb, "%s", dp->d_ident);
639 sbuf_printf(sb, "</ident>\n");
640 }
641 sbuf_printf(sb, "%s<descr>", indent);
642 g_conf_printf_escaped(sb, "%s", dp->d_descr);
643 sbuf_printf(sb, "</descr>\n");
644 }
645 }
646
647 static void
g_disk_resize(void * ptr,int flag)648 g_disk_resize(void *ptr, int flag)
649 {
650 struct disk *dp;
651 struct g_geom *gp;
652 struct g_provider *pp;
653
654 if (flag == EV_CANCEL)
655 return;
656 g_topology_assert();
657
658 dp = ptr;
659 gp = dp->d_geom;
660
661 if (dp->d_destroyed || gp == NULL)
662 return;
663
664 LIST_FOREACH(pp, &gp->provider, provider) {
665 if (pp->sectorsize != 0 &&
666 pp->sectorsize != dp->d_sectorsize)
667 g_wither_provider(pp, ENXIO);
668 else
669 g_resize_provider(pp, dp->d_mediasize);
670 }
671 }
672
673 static void
g_disk_create(void * arg,int flag)674 g_disk_create(void *arg, int flag)
675 {
676 struct g_geom *gp;
677 struct g_provider *pp;
678 struct disk *dp;
679 struct g_disk_softc *sc;
680 char tmpstr[80];
681
682 if (flag == EV_CANCEL)
683 return;
684 g_topology_assert();
685 dp = arg;
686
687 mtx_pool_lock(mtxpool_sleep, dp);
688 dp->d_init_level = DISK_INIT_START;
689
690 /*
691 * If the disk has already gone away, we can just stop here and
692 * call the user's callback to tell him we've cleaned things up.
693 */
694 if (dp->d_goneflag != 0) {
695 mtx_pool_unlock(mtxpool_sleep, dp);
696 if (dp->d_gone != NULL)
697 dp->d_gone(dp);
698 return;
699 }
700 mtx_pool_unlock(mtxpool_sleep, dp);
701
702 sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO);
703 mtx_init(&sc->start_mtx, "g_disk_start", NULL, MTX_DEF);
704 mtx_init(&sc->done_mtx, "g_disk_done", NULL, MTX_DEF);
705 sc->dp = dp;
706 sc->d_devstat = dp->d_devstat;
707 gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit);
708 gp->softc = sc;
709 pp = g_new_providerf(gp, "%s", gp->name);
710 devstat_remove_entry(pp->stat);
711 pp->stat = NULL;
712 dp->d_devstat->id = pp;
713 pp->mediasize = dp->d_mediasize;
714 pp->sectorsize = dp->d_sectorsize;
715 pp->stripeoffset = dp->d_stripeoffset;
716 pp->stripesize = dp->d_stripesize;
717 if ((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0)
718 pp->flags |= G_PF_ACCEPT_UNMAPPED;
719 if ((dp->d_flags & DISKFLAG_DIRECT_COMPLETION) != 0)
720 pp->flags |= G_PF_DIRECT_SEND;
721 pp->flags |= G_PF_DIRECT_RECEIVE;
722 if (bootverbose)
723 printf("GEOM: new disk %s\n", gp->name);
724 sysctl_ctx_init(&sc->sysctl_ctx);
725 snprintf(tmpstr, sizeof(tmpstr), "GEOM disk %s", gp->name);
726 sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx,
727 SYSCTL_STATIC_CHILDREN(_kern_geom_disk), OID_AUTO, gp->name,
728 CTLFLAG_RD, 0, tmpstr);
729 if (sc->sysctl_tree != NULL) {
730 SYSCTL_ADD_STRING(&sc->sysctl_ctx,
731 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "led",
732 CTLFLAG_RWTUN, sc->led, sizeof(sc->led),
733 "LED name");
734 }
735 pp->private = sc;
736 dp->d_geom = gp;
737 g_error_provider(pp, 0);
738
739 mtx_pool_lock(mtxpool_sleep, dp);
740 dp->d_init_level = DISK_INIT_DONE;
741
742 /*
743 * If the disk has gone away at this stage, start the withering
744 * process for it.
745 */
746 if (dp->d_goneflag != 0) {
747 mtx_pool_unlock(mtxpool_sleep, dp);
748 g_wither_provider(pp, ENXIO);
749 return;
750 }
751 mtx_pool_unlock(mtxpool_sleep, dp);
752
753 }
754
755 /*
756 * We get this callback after all of the consumers have gone away, and just
757 * before the provider is freed. If the disk driver provided a d_gone
758 * callback, let them know that it is okay to free resources -- they won't
759 * be getting any more accesses from GEOM.
760 */
761 static void
g_disk_providergone(struct g_provider * pp)762 g_disk_providergone(struct g_provider *pp)
763 {
764 struct disk *dp;
765 struct g_disk_softc *sc;
766
767 sc = (struct g_disk_softc *)pp->private;
768 dp = sc->dp;
769 if (dp != NULL && dp->d_gone != NULL)
770 dp->d_gone(dp);
771 if (sc->sysctl_tree != NULL) {
772 sysctl_ctx_free(&sc->sysctl_ctx);
773 sc->sysctl_tree = NULL;
774 }
775 if (sc->led[0] != 0) {
776 led_set(sc->led, "0");
777 sc->led[0] = 0;
778 }
779 pp->private = NULL;
780 pp->geom->softc = NULL;
781 mtx_destroy(&sc->done_mtx);
782 mtx_destroy(&sc->start_mtx);
783 g_free(sc);
784 }
785
786 static void
g_disk_destroy(void * ptr,int flag)787 g_disk_destroy(void *ptr, int flag)
788 {
789 struct disk *dp;
790 struct g_geom *gp;
791 struct g_disk_softc *sc;
792
793 g_topology_assert();
794 dp = ptr;
795 gp = dp->d_geom;
796 if (gp != NULL) {
797 sc = gp->softc;
798 if (sc != NULL)
799 sc->dp = NULL;
800 dp->d_geom = NULL;
801 g_wither_geom(gp, ENXIO);
802 }
803
804 g_free(dp);
805 }
806
807 /*
808 * We only allow printable characters in disk ident,
809 * the rest is converted to 'x<HH>'.
810 */
811 static void
g_disk_ident_adjust(char * ident,size_t size)812 g_disk_ident_adjust(char *ident, size_t size)
813 {
814 char *p, tmp[4], newid[DISK_IDENT_SIZE];
815
816 newid[0] = '\0';
817 for (p = ident; *p != '\0'; p++) {
818 if (isprint(*p)) {
819 tmp[0] = *p;
820 tmp[1] = '\0';
821 } else {
822 snprintf(tmp, sizeof(tmp), "x%02hhx",
823 *(unsigned char *)p);
824 }
825 if (strlcat(newid, tmp, sizeof(newid)) >= sizeof(newid))
826 break;
827 }
828 bzero(ident, size);
829 strlcpy(ident, newid, size);
830 }
831
832 struct disk *
disk_alloc(void)833 disk_alloc(void)
834 {
835
836 return (g_malloc(sizeof(struct disk), M_WAITOK | M_ZERO));
837 }
838
839 void
disk_create(struct disk * dp,int version)840 disk_create(struct disk *dp, int version)
841 {
842
843 if (version != DISK_VERSION) {
844 printf("WARNING: Attempt to add disk %s%d %s",
845 dp->d_name, dp->d_unit,
846 " using incompatible ABI version of disk(9)\n");
847 printf("WARNING: Ignoring disk %s%d\n",
848 dp->d_name, dp->d_unit);
849 return;
850 }
851 if (dp->d_flags & DISKFLAG_RESERVED) {
852 printf("WARNING: Attempt to add non-MPSAFE disk %s%d\n",
853 dp->d_name, dp->d_unit);
854 printf("WARNING: Ignoring disk %s%d\n",
855 dp->d_name, dp->d_unit);
856 return;
857 }
858 KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy"));
859 KASSERT(dp->d_name != NULL, ("disk_create need d_name"));
860 KASSERT(*dp->d_name != 0, ("disk_create need d_name"));
861 KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long"));
862 if (dp->d_devstat == NULL)
863 dp->d_devstat = devstat_new_entry(dp->d_name, dp->d_unit,
864 dp->d_sectorsize, DEVSTAT_ALL_SUPPORTED,
865 DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX);
866 dp->d_geom = NULL;
867
868 dp->d_init_level = DISK_INIT_NONE;
869
870 g_disk_ident_adjust(dp->d_ident, sizeof(dp->d_ident));
871 g_post_event(g_disk_create, dp, M_WAITOK, dp, NULL);
872 }
873
874 void
disk_destroy(struct disk * dp)875 disk_destroy(struct disk *dp)
876 {
877
878 g_cancel_event(dp);
879 dp->d_destroyed = 1;
880 if (dp->d_devstat != NULL)
881 devstat_remove_entry(dp->d_devstat);
882 g_post_event(g_disk_destroy, dp, M_WAITOK, NULL);
883 }
884
885 void
disk_gone(struct disk * dp)886 disk_gone(struct disk *dp)
887 {
888 struct g_geom *gp;
889 struct g_provider *pp;
890
891 mtx_pool_lock(mtxpool_sleep, dp);
892 dp->d_goneflag = 1;
893
894 /*
895 * If we're still in the process of creating this disk (the
896 * g_disk_create() function is still queued, or is in
897 * progress), the init level will not yet be DISK_INIT_DONE.
898 *
899 * If that is the case, g_disk_create() will see d_goneflag
900 * and take care of cleaning things up.
901 *
902 * If the disk has already been created, we default to
903 * withering the provider as usual below.
904 *
905 * If the caller has not set a d_gone() callback, he will
906 * not be any worse off by returning here, because the geom
907 * has not been fully setup in any case.
908 */
909 if (dp->d_init_level < DISK_INIT_DONE) {
910 mtx_pool_unlock(mtxpool_sleep, dp);
911 return;
912 }
913 mtx_pool_unlock(mtxpool_sleep, dp);
914
915 gp = dp->d_geom;
916 if (gp != NULL) {
917 pp = LIST_FIRST(&gp->provider);
918 if (pp != NULL) {
919 KASSERT(LIST_NEXT(pp, provider) == NULL,
920 ("geom %p has more than one provider", gp));
921 g_wither_provider(pp, ENXIO);
922 }
923 }
924 }
925
926 void
disk_attr_changed(struct disk * dp,const char * attr,int flag)927 disk_attr_changed(struct disk *dp, const char *attr, int flag)
928 {
929 struct g_geom *gp;
930 struct g_provider *pp;
931 char devnamebuf[128];
932
933 gp = dp->d_geom;
934 if (gp != NULL)
935 LIST_FOREACH(pp, &gp->provider, provider)
936 (void)g_attr_changed(pp, attr, flag);
937 snprintf(devnamebuf, sizeof(devnamebuf), "devname=%s%d", dp->d_name,
938 dp->d_unit);
939 devctl_notify("GEOM", "disk", attr, devnamebuf);
940 }
941
942 void
disk_media_changed(struct disk * dp,int flag)943 disk_media_changed(struct disk *dp, int flag)
944 {
945 struct g_geom *gp;
946 struct g_provider *pp;
947
948 gp = dp->d_geom;
949 if (gp != NULL) {
950 pp = LIST_FIRST(&gp->provider);
951 if (pp != NULL) {
952 KASSERT(LIST_NEXT(pp, provider) == NULL,
953 ("geom %p has more than one provider", gp));
954 g_media_changed(pp, flag);
955 }
956 }
957 }
958
959 void
disk_media_gone(struct disk * dp,int flag)960 disk_media_gone(struct disk *dp, int flag)
961 {
962 struct g_geom *gp;
963 struct g_provider *pp;
964
965 gp = dp->d_geom;
966 if (gp != NULL) {
967 pp = LIST_FIRST(&gp->provider);
968 if (pp != NULL) {
969 KASSERT(LIST_NEXT(pp, provider) == NULL,
970 ("geom %p has more than one provider", gp));
971 g_media_gone(pp, flag);
972 }
973 }
974 }
975
976 int
disk_resize(struct disk * dp,int flag)977 disk_resize(struct disk *dp, int flag)
978 {
979
980 if (dp->d_destroyed || dp->d_geom == NULL)
981 return (0);
982
983 return (g_post_event(g_disk_resize, dp, flag, NULL));
984 }
985
986 static void
g_kern_disks(void * p,int flag __unused)987 g_kern_disks(void *p, int flag __unused)
988 {
989 struct sbuf *sb;
990 struct g_geom *gp;
991 char *sp;
992
993 sb = p;
994 sp = "";
995 g_topology_assert();
996 LIST_FOREACH(gp, &g_disk_class.geom, geom) {
997 sbuf_printf(sb, "%s%s", sp, gp->name);
998 sp = " ";
999 }
1000 sbuf_finish(sb);
1001 }
1002
1003 static int
sysctl_disks(SYSCTL_HANDLER_ARGS)1004 sysctl_disks(SYSCTL_HANDLER_ARGS)
1005 {
1006 int error;
1007 struct sbuf *sb;
1008
1009 sb = sbuf_new_auto();
1010 g_waitfor_event(g_kern_disks, sb, M_WAITOK, NULL);
1011 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
1012 sbuf_delete(sb);
1013 return error;
1014 }
1015
1016 SYSCTL_PROC(_kern, OID_AUTO, disks,
1017 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
1018 sysctl_disks, "A", "names of available disks");
1019