1 /*-
2 * Copyright (c) 2010 Edward Tomasz Napierala <trasz@FreeBSD.org>
3 * Copyright (c) 2004-2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
30
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/kernel.h>
34 #include <sys/module.h>
35 #include <sys/lock.h>
36 #include <sys/mutex.h>
37 #include <sys/bio.h>
38 #include <sys/disk.h>
39 #include <sys/proc.h>
40 #include <sys/sbuf.h>
41 #include <sys/sysctl.h>
42 #include <sys/malloc.h>
43 #include <sys/eventhandler.h>
44 #include <geom/geom.h>
45 #include <geom/mountver/g_mountver.h>
46
47
48 SYSCTL_DECL(_kern_geom);
49 static SYSCTL_NODE(_kern_geom, OID_AUTO, mountver, CTLFLAG_RW,
50 0, "GEOM_MOUNTVER stuff");
51 static u_int g_mountver_debug = 0;
52 static u_int g_mountver_check_ident = 1;
53 SYSCTL_UINT(_kern_geom_mountver, OID_AUTO, debug, CTLFLAG_RW,
54 &g_mountver_debug, 0, "Debug level");
55 SYSCTL_UINT(_kern_geom_mountver, OID_AUTO, check_ident, CTLFLAG_RW,
56 &g_mountver_check_ident, 0, "Check disk ident when reattaching");
57
58 static eventhandler_tag g_mountver_pre_sync = NULL;
59
60 static void g_mountver_queue(struct bio *bp);
61 static void g_mountver_orphan(struct g_consumer *cp);
62 static void g_mountver_resize(struct g_consumer *cp);
63 static int g_mountver_destroy(struct g_geom *gp, boolean_t force);
64 static g_taste_t g_mountver_taste;
65 static int g_mountver_destroy_geom(struct gctl_req *req, struct g_class *mp,
66 struct g_geom *gp);
67 static void g_mountver_config(struct gctl_req *req, struct g_class *mp,
68 const char *verb);
69 static void g_mountver_dumpconf(struct sbuf *sb, const char *indent,
70 struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp);
71 static void g_mountver_init(struct g_class *mp);
72 static void g_mountver_fini(struct g_class *mp);
73
74 struct g_class g_mountver_class = {
75 .name = G_MOUNTVER_CLASS_NAME,
76 .version = G_VERSION,
77 .ctlreq = g_mountver_config,
78 .taste = g_mountver_taste,
79 .destroy_geom = g_mountver_destroy_geom,
80 .init = g_mountver_init,
81 .fini = g_mountver_fini
82 };
83
84 static void
g_mountver_detach(void * arg,int flags __unused)85 g_mountver_detach(void *arg, int flags __unused)
86 {
87 struct g_consumer *cp = arg;
88
89 g_topology_assert();
90 if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0)
91 g_access(cp, -cp->acr, -cp->acw, -cp->ace);
92 g_detach(cp);
93 }
94
95 static void
g_mountver_done(struct bio * bp)96 g_mountver_done(struct bio *bp)
97 {
98 struct g_mountver_softc *sc;
99 struct g_geom *gp;
100 struct g_consumer *cp;
101 struct bio *pbp;
102
103 cp = bp->bio_from;
104 gp = cp->geom;
105 if (bp->bio_error != ENXIO) {
106 g_std_done(bp);
107 goto done;
108 }
109
110 /*
111 * When the device goes away, it's possible that few requests
112 * will be completed with ENXIO before g_mountver_orphan()
113 * gets called. To work around that, we have to queue requests
114 * that failed with ENXIO, in order to send them later.
115 */
116 pbp = bp->bio_parent;
117 KASSERT(pbp->bio_to == LIST_FIRST(&gp->provider),
118 ("parent request was for someone else"));
119 g_destroy_bio(bp);
120 pbp->bio_inbed++;
121 g_mountver_queue(pbp);
122
123 done:
124 sc = gp->softc;
125 mtx_lock(&sc->sc_mtx);
126 if (--cp->index == 0 && sc->sc_orphaned)
127 g_post_event(g_mountver_detach, cp, M_NOWAIT, NULL);
128 mtx_unlock(&sc->sc_mtx);
129 }
130
131 /*
132 * Send the BIO down. The function is called with sc_mtx held to cover
133 * the race with orphan, but drops it before external calls.
134 */
135 static void
g_mountver_send(struct g_geom * gp,struct bio * bp)136 g_mountver_send(struct g_geom *gp, struct bio *bp)
137 {
138 struct g_mountver_softc *sc = gp->softc;
139 struct g_consumer *cp;
140 struct bio *cbp;
141
142 mtx_assert(&sc->sc_mtx, MA_OWNED);
143 cbp = g_clone_bio(bp);
144 if (cbp == NULL) {
145 mtx_unlock(&sc->sc_mtx);
146 g_io_deliver(bp, ENOMEM);
147 return;
148 }
149 cp = LIST_FIRST(&gp->consumer);
150 cp->index++;
151 mtx_unlock(&sc->sc_mtx);
152
153 cbp->bio_done = g_mountver_done;
154 g_io_request(cbp, cp);
155 }
156
157 static void
g_mountver_queue(struct bio * bp)158 g_mountver_queue(struct bio *bp)
159 {
160 struct g_mountver_softc *sc;
161 struct g_geom *gp;
162
163 gp = bp->bio_to->geom;
164 sc = gp->softc;
165
166 mtx_lock(&sc->sc_mtx);
167 TAILQ_INSERT_TAIL(&sc->sc_queue, bp, bio_queue);
168 mtx_unlock(&sc->sc_mtx);
169 }
170
171 static void
g_mountver_send_queued(struct g_geom * gp)172 g_mountver_send_queued(struct g_geom *gp)
173 {
174 struct g_mountver_softc *sc;
175 struct bio *bp;
176
177 sc = gp->softc;
178
179 mtx_lock(&sc->sc_mtx);
180 while ((bp = TAILQ_FIRST(&sc->sc_queue)) != NULL && !sc->sc_orphaned) {
181 TAILQ_REMOVE(&sc->sc_queue, bp, bio_queue);
182 G_MOUNTVER_LOGREQ(bp, "Sending queued request.");
183 /* sc_mtx is dropped inside */
184 g_mountver_send(gp, bp);
185 mtx_lock(&sc->sc_mtx);
186 }
187 mtx_unlock(&sc->sc_mtx);
188 }
189
190 static void
g_mountver_discard_queued(struct g_geom * gp)191 g_mountver_discard_queued(struct g_geom *gp)
192 {
193 struct g_mountver_softc *sc;
194 struct bio *bp;
195
196 sc = gp->softc;
197
198 mtx_lock(&sc->sc_mtx);
199 while ((bp = TAILQ_FIRST(&sc->sc_queue)) != NULL) {
200 TAILQ_REMOVE(&sc->sc_queue, bp, bio_queue);
201 mtx_unlock(&sc->sc_mtx);
202 G_MOUNTVER_LOGREQ(bp, "Discarding queued request.");
203 g_io_deliver(bp, ENXIO);
204 mtx_lock(&sc->sc_mtx);
205 }
206 mtx_unlock(&sc->sc_mtx);
207 }
208
209 static void
g_mountver_start(struct bio * bp)210 g_mountver_start(struct bio *bp)
211 {
212 struct g_mountver_softc *sc;
213 struct g_geom *gp;
214
215 gp = bp->bio_to->geom;
216 sc = gp->softc;
217 G_MOUNTVER_LOGREQ(bp, "Request received.");
218
219 /*
220 * It is possible that some bios were returned with ENXIO, even though
221 * orphaning didn't happen yet. In that case, queue all subsequent
222 * requests in order to maintain ordering.
223 */
224 mtx_lock(&sc->sc_mtx);
225 if (sc->sc_orphaned || !TAILQ_EMPTY(&sc->sc_queue)) {
226 mtx_unlock(&sc->sc_mtx);
227 if (sc->sc_shutting_down) {
228 G_MOUNTVER_LOGREQ(bp, "Discarding request due to shutdown.");
229 g_io_deliver(bp, ENXIO);
230 return;
231 }
232 G_MOUNTVER_LOGREQ(bp, "Queueing request.");
233 g_mountver_queue(bp);
234 if (!sc->sc_orphaned)
235 g_mountver_send_queued(gp);
236 } else {
237 G_MOUNTVER_LOGREQ(bp, "Sending request.");
238 /* sc_mtx is dropped inside */
239 g_mountver_send(gp, bp);
240 }
241 }
242
243 static int
g_mountver_access(struct g_provider * pp,int dr,int dw,int de)244 g_mountver_access(struct g_provider *pp, int dr, int dw, int de)
245 {
246 struct g_mountver_softc *sc;
247 struct g_geom *gp;
248 struct g_consumer *cp;
249
250 g_topology_assert();
251
252 gp = pp->geom;
253 cp = LIST_FIRST(&gp->consumer);
254 sc = gp->softc;
255 if (sc == NULL && dr <= 0 && dw <= 0 && de <= 0)
256 return (0);
257 KASSERT(sc != NULL, ("Trying to access withered provider \"%s\".", pp->name));
258
259 sc->sc_access_r += dr;
260 sc->sc_access_w += dw;
261 sc->sc_access_e += de;
262
263 if (sc->sc_orphaned)
264 return (0);
265
266 return (g_access(cp, dr, dw, de));
267 }
268
269 static int
g_mountver_create(struct gctl_req * req,struct g_class * mp,struct g_provider * pp)270 g_mountver_create(struct gctl_req *req, struct g_class *mp, struct g_provider *pp)
271 {
272 struct g_mountver_softc *sc;
273 struct g_geom *gp;
274 struct g_provider *newpp;
275 struct g_consumer *cp;
276 char name[64];
277 int error;
278 int identsize = DISK_IDENT_SIZE;
279
280 g_topology_assert();
281
282 gp = NULL;
283 newpp = NULL;
284 cp = NULL;
285
286 snprintf(name, sizeof(name), "%s%s", pp->name, G_MOUNTVER_SUFFIX);
287 LIST_FOREACH(gp, &mp->geom, geom) {
288 if (strcmp(gp->name, name) == 0) {
289 gctl_error(req, "Provider %s already exists.", name);
290 return (EEXIST);
291 }
292 }
293 gp = g_new_geomf(mp, "%s", name);
294 sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO);
295 mtx_init(&sc->sc_mtx, "gmountver", NULL, MTX_DEF | MTX_RECURSE);
296 TAILQ_INIT(&sc->sc_queue);
297 sc->sc_provider_name = strdup(pp->name, M_GEOM);
298 gp->softc = sc;
299 gp->start = g_mountver_start;
300 gp->orphan = g_mountver_orphan;
301 gp->resize = g_mountver_resize;
302 gp->access = g_mountver_access;
303 gp->dumpconf = g_mountver_dumpconf;
304
305 newpp = g_new_providerf(gp, "%s", gp->name);
306 newpp->mediasize = pp->mediasize;
307 newpp->sectorsize = pp->sectorsize;
308 newpp->flags |= G_PF_DIRECT_SEND | G_PF_DIRECT_RECEIVE;
309
310 if ((pp->flags & G_PF_ACCEPT_UNMAPPED) != 0) {
311 G_MOUNTVER_DEBUG(0, "Unmapped supported for %s.", gp->name);
312 newpp->flags |= G_PF_ACCEPT_UNMAPPED;
313 } else {
314 G_MOUNTVER_DEBUG(0, "Unmapped unsupported for %s.", gp->name);
315 newpp->flags &= ~G_PF_ACCEPT_UNMAPPED;
316 }
317
318 cp = g_new_consumer(gp);
319 cp->flags |= G_CF_DIRECT_SEND | G_CF_DIRECT_RECEIVE;
320 error = g_attach(cp, pp);
321 if (error != 0) {
322 gctl_error(req, "Cannot attach to provider %s.", pp->name);
323 goto fail;
324 }
325 error = g_access(cp, 1, 0, 0);
326 if (error != 0) {
327 gctl_error(req, "Cannot access provider %s.", pp->name);
328 goto fail;
329 }
330 error = g_io_getattr("GEOM::ident", cp, &identsize, sc->sc_ident);
331 g_access(cp, -1, 0, 0);
332 if (error != 0) {
333 if (g_mountver_check_ident) {
334 gctl_error(req, "Cannot get disk ident from %s; error = %d.", pp->name, error);
335 goto fail;
336 }
337
338 G_MOUNTVER_DEBUG(0, "Cannot get disk ident from %s; error = %d.", pp->name, error);
339 sc->sc_ident[0] = '\0';
340 }
341
342 g_error_provider(newpp, 0);
343 G_MOUNTVER_DEBUG(0, "Device %s created.", gp->name);
344 return (0);
345 fail:
346 g_free(sc->sc_provider_name);
347 if (cp->provider != NULL)
348 g_detach(cp);
349 g_destroy_consumer(cp);
350 g_destroy_provider(newpp);
351 g_free(gp->softc);
352 g_destroy_geom(gp);
353 return (error);
354 }
355
356 static int
g_mountver_destroy(struct g_geom * gp,boolean_t force)357 g_mountver_destroy(struct g_geom *gp, boolean_t force)
358 {
359 struct g_mountver_softc *sc;
360 struct g_provider *pp;
361
362 g_topology_assert();
363 if (gp->softc == NULL)
364 return (ENXIO);
365 sc = gp->softc;
366 pp = LIST_FIRST(&gp->provider);
367 if (pp != NULL && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) {
368 if (force) {
369 G_MOUNTVER_DEBUG(0, "Device %s is still open, so it "
370 "can't be definitely removed.", pp->name);
371 } else {
372 G_MOUNTVER_DEBUG(1, "Device %s is still open (r%dw%de%d).",
373 pp->name, pp->acr, pp->acw, pp->ace);
374 return (EBUSY);
375 }
376 } else {
377 G_MOUNTVER_DEBUG(0, "Device %s removed.", gp->name);
378 }
379 if (pp != NULL)
380 g_wither_provider(pp, ENXIO);
381 g_mountver_discard_queued(gp);
382 g_free(sc->sc_provider_name);
383 g_free(gp->softc);
384 gp->softc = NULL;
385 g_wither_geom(gp, ENXIO);
386
387 return (0);
388 }
389
390 static int
g_mountver_destroy_geom(struct gctl_req * req,struct g_class * mp,struct g_geom * gp)391 g_mountver_destroy_geom(struct gctl_req *req, struct g_class *mp, struct g_geom *gp)
392 {
393
394 return (g_mountver_destroy(gp, 0));
395 }
396
397 static void
g_mountver_ctl_create(struct gctl_req * req,struct g_class * mp)398 g_mountver_ctl_create(struct gctl_req *req, struct g_class *mp)
399 {
400 struct g_provider *pp;
401 const char *name;
402 char param[16];
403 int i, *nargs;
404
405 g_topology_assert();
406
407 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
408 if (nargs == NULL) {
409 gctl_error(req, "No '%s' argument", "nargs");
410 return;
411 }
412 if (*nargs <= 0) {
413 gctl_error(req, "Missing device(s).");
414 return;
415 }
416 for (i = 0; i < *nargs; i++) {
417 snprintf(param, sizeof(param), "arg%d", i);
418 name = gctl_get_asciiparam(req, param);
419 if (name == NULL) {
420 gctl_error(req, "No 'arg%d' argument", i);
421 return;
422 }
423 if (strncmp(name, "/dev/", strlen("/dev/")) == 0)
424 name += strlen("/dev/");
425 pp = g_provider_by_name(name);
426 if (pp == NULL) {
427 G_MOUNTVER_DEBUG(1, "Provider %s is invalid.", name);
428 gctl_error(req, "Provider %s is invalid.", name);
429 return;
430 }
431 if (g_mountver_create(req, mp, pp) != 0)
432 return;
433 }
434 }
435
436 static struct g_geom *
g_mountver_find_geom(struct g_class * mp,const char * name)437 g_mountver_find_geom(struct g_class *mp, const char *name)
438 {
439 struct g_geom *gp;
440
441 LIST_FOREACH(gp, &mp->geom, geom) {
442 if (strcmp(gp->name, name) == 0)
443 return (gp);
444 }
445 return (NULL);
446 }
447
448 static void
g_mountver_ctl_destroy(struct gctl_req * req,struct g_class * mp)449 g_mountver_ctl_destroy(struct gctl_req *req, struct g_class *mp)
450 {
451 int *nargs, *force, error, i;
452 struct g_geom *gp;
453 const char *name;
454 char param[16];
455
456 g_topology_assert();
457
458 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
459 if (nargs == NULL) {
460 gctl_error(req, "No '%s' argument", "nargs");
461 return;
462 }
463 if (*nargs <= 0) {
464 gctl_error(req, "Missing device(s).");
465 return;
466 }
467 force = gctl_get_paraml(req, "force", sizeof(*force));
468 if (force == NULL) {
469 gctl_error(req, "No 'force' argument");
470 return;
471 }
472
473 for (i = 0; i < *nargs; i++) {
474 snprintf(param, sizeof(param), "arg%d", i);
475 name = gctl_get_asciiparam(req, param);
476 if (name == NULL) {
477 gctl_error(req, "No 'arg%d' argument", i);
478 return;
479 }
480 if (strncmp(name, "/dev/", strlen("/dev/")) == 0)
481 name += strlen("/dev/");
482 gp = g_mountver_find_geom(mp, name);
483 if (gp == NULL) {
484 G_MOUNTVER_DEBUG(1, "Device %s is invalid.", name);
485 gctl_error(req, "Device %s is invalid.", name);
486 return;
487 }
488 error = g_mountver_destroy(gp, *force);
489 if (error != 0) {
490 gctl_error(req, "Cannot destroy device %s (error=%d).",
491 gp->name, error);
492 return;
493 }
494 }
495 }
496
497 static void
g_mountver_orphan(struct g_consumer * cp)498 g_mountver_orphan(struct g_consumer *cp)
499 {
500 struct g_mountver_softc *sc;
501 int done;
502
503 g_topology_assert();
504
505 sc = cp->geom->softc;
506 mtx_lock(&sc->sc_mtx);
507 sc->sc_orphaned = 1;
508 done = (cp->index == 0);
509 mtx_unlock(&sc->sc_mtx);
510 if (done)
511 g_mountver_detach(cp, 0);
512 G_MOUNTVER_DEBUG(0, "%s is offline. Mount verification in progress.", sc->sc_provider_name);
513 }
514
515 static void
g_mountver_resize(struct g_consumer * cp)516 g_mountver_resize(struct g_consumer *cp)
517 {
518 struct g_geom *gp;
519 struct g_provider *pp;
520
521 gp = cp->geom;
522
523 LIST_FOREACH(pp, &gp->provider, provider)
524 g_resize_provider(pp, cp->provider->mediasize);
525 }
526
527 static int
g_mountver_ident_matches(struct g_geom * gp)528 g_mountver_ident_matches(struct g_geom *gp)
529 {
530 struct g_consumer *cp;
531 struct g_mountver_softc *sc;
532 char ident[DISK_IDENT_SIZE];
533 int error, identsize = DISK_IDENT_SIZE;
534
535 sc = gp->softc;
536 cp = LIST_FIRST(&gp->consumer);
537
538 if (g_mountver_check_ident == 0)
539 return (0);
540
541 error = g_access(cp, 1, 0, 0);
542 if (error != 0) {
543 G_MOUNTVER_DEBUG(0, "Cannot access %s; "
544 "not attaching; error = %d.", gp->name, error);
545 return (1);
546 }
547 error = g_io_getattr("GEOM::ident", cp, &identsize, ident);
548 g_access(cp, -1, 0, 0);
549 if (error != 0) {
550 G_MOUNTVER_DEBUG(0, "Cannot get disk ident for %s; "
551 "not attaching; error = %d.", gp->name, error);
552 return (1);
553 }
554 if (strcmp(ident, sc->sc_ident) != 0) {
555 G_MOUNTVER_DEBUG(1, "Disk ident for %s (\"%s\") is different "
556 "from expected \"%s\", not attaching.", gp->name, ident,
557 sc->sc_ident);
558 return (1);
559 }
560
561 return (0);
562 }
563
564 static struct g_geom *
g_mountver_taste(struct g_class * mp,struct g_provider * pp,int flags __unused)565 g_mountver_taste(struct g_class *mp, struct g_provider *pp, int flags __unused)
566 {
567 struct g_mountver_softc *sc;
568 struct g_consumer *cp;
569 struct g_geom *gp;
570 int error;
571
572 g_topology_assert();
573 g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name);
574 G_MOUNTVER_DEBUG(2, "Tasting %s.", pp->name);
575
576 /*
577 * Let's check if device already exists.
578 */
579 LIST_FOREACH(gp, &mp->geom, geom) {
580 sc = gp->softc;
581 if (sc == NULL)
582 continue;
583
584 /* Already attached? */
585 if (pp == LIST_FIRST(&gp->provider))
586 return (NULL);
587
588 if (sc->sc_orphaned && strcmp(pp->name, sc->sc_provider_name) == 0)
589 break;
590 }
591 if (gp == NULL)
592 return (NULL);
593
594 cp = LIST_FIRST(&gp->consumer);
595 g_attach(cp, pp);
596 error = g_mountver_ident_matches(gp);
597 if (error != 0) {
598 g_detach(cp);
599 return (NULL);
600 }
601 if (sc->sc_access_r > 0 || sc->sc_access_w > 0 || sc->sc_access_e > 0) {
602 error = g_access(cp, sc->sc_access_r, sc->sc_access_w, sc->sc_access_e);
603 if (error != 0) {
604 G_MOUNTVER_DEBUG(0, "Cannot access %s; error = %d.", pp->name, error);
605 g_detach(cp);
606 return (NULL);
607 }
608 }
609 sc->sc_orphaned = 0;
610 g_mountver_send_queued(gp);
611 G_MOUNTVER_DEBUG(0, "%s has completed mount verification.", sc->sc_provider_name);
612
613 return (gp);
614 }
615
616 static void
g_mountver_config(struct gctl_req * req,struct g_class * mp,const char * verb)617 g_mountver_config(struct gctl_req *req, struct g_class *mp, const char *verb)
618 {
619 uint32_t *version;
620
621 g_topology_assert();
622
623 version = gctl_get_paraml(req, "version", sizeof(*version));
624 if (version == NULL) {
625 gctl_error(req, "No '%s' argument.", "version");
626 return;
627 }
628 if (*version != G_MOUNTVER_VERSION) {
629 gctl_error(req, "Userland and kernel parts are out of sync.");
630 return;
631 }
632
633 if (strcmp(verb, "create") == 0) {
634 g_mountver_ctl_create(req, mp);
635 return;
636 } else if (strcmp(verb, "destroy") == 0) {
637 g_mountver_ctl_destroy(req, mp);
638 return;
639 }
640
641 gctl_error(req, "Unknown verb.");
642 }
643
644 static void
g_mountver_dumpconf(struct sbuf * sb,const char * indent,struct g_geom * gp,struct g_consumer * cp,struct g_provider * pp)645 g_mountver_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp,
646 struct g_consumer *cp, struct g_provider *pp)
647 {
648 struct g_mountver_softc *sc;
649
650 if (pp != NULL || cp != NULL)
651 return;
652
653 sc = gp->softc;
654 sbuf_printf(sb, "%s<State>%s</State>\n", indent,
655 sc->sc_orphaned ? "OFFLINE" : "ONLINE");
656 sbuf_printf(sb, "%s<Provider-Name>%s</Provider-Name>\n", indent, sc->sc_provider_name);
657 sbuf_printf(sb, "%s<Disk-Ident>%s</Disk-Ident>\n", indent, sc->sc_ident);
658 }
659
660 static void
g_mountver_shutdown_pre_sync(void * arg,int howto)661 g_mountver_shutdown_pre_sync(void *arg, int howto)
662 {
663 struct g_mountver_softc *sc;
664 struct g_class *mp;
665 struct g_geom *gp, *gp2;
666
667 mp = arg;
668 g_topology_lock();
669 LIST_FOREACH_SAFE(gp, &mp->geom, geom, gp2) {
670 if (gp->softc == NULL)
671 continue;
672 sc = gp->softc;
673 sc->sc_shutting_down = 1;
674 if (sc->sc_orphaned)
675 g_mountver_destroy(gp, 1);
676 }
677 g_topology_unlock();
678 }
679
680 static void
g_mountver_init(struct g_class * mp)681 g_mountver_init(struct g_class *mp)
682 {
683
684 g_mountver_pre_sync = EVENTHANDLER_REGISTER(shutdown_pre_sync,
685 g_mountver_shutdown_pre_sync, mp, SHUTDOWN_PRI_FIRST);
686 if (g_mountver_pre_sync == NULL)
687 G_MOUNTVER_DEBUG(0, "Warning! Cannot register shutdown event.");
688 }
689
690 static void
g_mountver_fini(struct g_class * mp)691 g_mountver_fini(struct g_class *mp)
692 {
693
694 if (g_mountver_pre_sync != NULL)
695 EVENTHANDLER_DEREGISTER(shutdown_pre_sync, g_mountver_pre_sync);
696 }
697
698 DECLARE_GEOM_CLASS(g_mountver_class, g_mountver);
699 MODULE_VERSION(geom_mountver, 0);
700