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