2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 2002 Poul-Henning Kamp
5 * Copyright (c) 2002 Networks Associates Technology, Inc.
8 * This software was developed for the FreeBSD Project by Poul-Henning Kamp
9 * and NAI Labs, the Security Research Division of Network Associates, Inc.
10 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
11 * DARPA CHATS research program.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. The names of the authors may not be used to endorse or promote
22 * products derived from this software without specific prior written
25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD$");
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/malloc.h>
44 #include <sys/kernel.h>
46 #include <sys/ctype.h>
50 #include <sys/mutex.h>
52 #include <sys/errno.h>
55 #include <sys/fcntl.h>
56 #include <sys/limits.h>
57 #include <sys/sysctl.h>
58 #include <geom/geom.h>
59 #include <geom/geom_int.h>
60 #include <machine/stdarg.h>
65 struct cdev *sc_alias;
68 #define SC_A_DESTROY (1 << 31)
69 #define SC_A_OPEN (1 << 30)
70 #define SC_A_ACTIVE (SC_A_OPEN - 1)
73 static d_open_t g_dev_open;
74 static d_close_t g_dev_close;
75 static d_strategy_t g_dev_strategy;
76 static d_ioctl_t g_dev_ioctl;
78 static struct cdevsw g_dev_cdevsw = {
79 .d_version = D_VERSION,
81 .d_close = g_dev_close,
84 .d_ioctl = g_dev_ioctl,
85 .d_strategy = g_dev_strategy,
87 .d_flags = D_DISK | D_TRACKCLOSE,
90 static g_init_t g_dev_init;
91 static g_fini_t g_dev_fini;
92 static g_taste_t g_dev_taste;
93 static g_orphan_t g_dev_orphan;
94 static g_attrchanged_t g_dev_attrchanged;
95 static g_resize_t g_dev_resize;
97 static struct g_class g_dev_class = {
102 .taste = g_dev_taste,
103 .orphan = g_dev_orphan,
104 .attrchanged = g_dev_attrchanged,
105 .resize = g_dev_resize
109 * We target 262144 (8 x 32768) sectors by default as this significantly
110 * increases the throughput on commonly used SSD's with a marginal
111 * increase in non-interruptible request latency.
113 static uint64_t g_dev_del_max_sectors = 262144;
114 SYSCTL_DECL(_kern_geom);
115 SYSCTL_NODE(_kern_geom, OID_AUTO, dev, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
117 SYSCTL_QUAD(_kern_geom_dev, OID_AUTO, delete_max_sectors, CTLFLAG_RW,
118 &g_dev_del_max_sectors, 0, "Maximum number of sectors in a single "
119 "delete request sent to the provider. Larger requests are chunked "
120 "so they can be interrupted. (0 = disable chunking)");
122 static char *dumpdev = NULL;
124 g_dev_init(struct g_class *mp)
127 dumpdev = kern_getenv("dumpdev");
131 g_dev_fini(struct g_class *mp)
139 g_dev_setdumpdev(struct cdev *dev, struct diocskerneldump_arg *kda)
141 struct g_kerneldump kd;
142 struct g_consumer *cp;
145 MPASS(dev != NULL && kda != NULL);
146 MPASS(kda->kda_index != KDA_REMOVE);
153 error = g_io_getattr("GEOM::kerneldump", cp, &len, &kd);
157 error = dumper_insert(&kd.di, devtoname(dev), kda);
159 dev->si_flags |= SI_DUMPDEV;
165 init_dumpdev(struct cdev *dev)
167 struct diocskerneldump_arg kda;
168 struct g_consumer *cp;
169 const char *devprefix = _PATH_DEV, *devname;
173 bzero(&kda, sizeof(kda));
174 kda.kda_index = KDA_APPEND;
179 len = strlen(devprefix);
180 devname = devtoname(dev);
181 if (strcmp(devname, dumpdev) != 0 &&
182 (strncmp(dumpdev, devprefix, len) != 0 ||
183 strcmp(devname, dumpdev + len) != 0))
186 cp = (struct g_consumer *)dev->si_drv2;
187 error = g_access(cp, 1, 0, 0);
191 error = g_dev_setdumpdev(dev, &kda);
197 (void)g_access(cp, -1, 0, 0);
203 g_dev_destroy(void *arg, int flags __unused)
205 struct g_consumer *cp;
207 struct g_dev_softc *sc;
208 char buf[SPECNAMELEN + 6];
214 g_trace(G_T_TOPOLOGY, "g_dev_destroy(%p(%s))", cp, gp->name);
215 snprintf(buf, sizeof(buf), "cdev=%s", gp->name);
216 devctl_notify_f("GEOM", "DEV", "DESTROY", buf, M_WAITOK);
217 if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0)
218 g_access(cp, -cp->acr, -cp->acw, -cp->ace);
220 g_destroy_consumer(cp);
222 mtx_destroy(&sc->sc_mtx);
232 LIST_FOREACH(gp, &g_dev_class.geom, geom) {
233 printf("%s%s", p, gp->name);
240 g_dev_set_physpath(struct g_consumer *cp)
242 struct g_dev_softc *sc;
244 int error, physpath_len;
246 if (g_access(cp, 1, 0, 0) != 0)
250 physpath_len = MAXPATHLEN;
251 physpath = g_malloc(physpath_len, M_WAITOK|M_ZERO);
252 error = g_io_getattr("GEOM::physpath", cp, &physpath_len, physpath);
253 g_access(cp, -1, 0, 0);
254 if (error == 0 && strlen(physpath) != 0) {
255 struct cdev *dev, *old_alias_dev;
256 struct cdev **alias_devp;
259 old_alias_dev = sc->sc_alias;
260 alias_devp = (struct cdev **)&sc->sc_alias;
261 make_dev_physpath_alias(MAKEDEV_WAITOK, alias_devp, dev,
262 old_alias_dev, physpath);
263 } else if (sc->sc_alias) {
264 destroy_dev((struct cdev *)sc->sc_alias);
271 g_dev_set_media(struct g_consumer *cp)
273 struct g_dev_softc *sc;
275 char buf[SPECNAMELEN + 6];
279 snprintf(buf, sizeof(buf), "cdev=%s", dev->si_name);
280 devctl_notify_f("DEVFS", "CDEV", "MEDIACHANGE", buf, M_WAITOK);
281 devctl_notify_f("GEOM", "DEV", "MEDIACHANGE", buf, M_WAITOK);
284 snprintf(buf, sizeof(buf), "cdev=%s", dev->si_name);
285 devctl_notify_f("DEVFS", "CDEV", "MEDIACHANGE", buf, M_WAITOK);
286 devctl_notify_f("GEOM", "DEV", "MEDIACHANGE", buf, M_WAITOK);
291 g_dev_attrchanged(struct g_consumer *cp, const char *attr)
294 if (strcmp(attr, "GEOM::media") == 0) {
299 if (strcmp(attr, "GEOM::physpath") == 0) {
300 g_dev_set_physpath(cp);
306 g_dev_resize(struct g_consumer *cp)
308 char buf[SPECNAMELEN + 6];
310 snprintf(buf, sizeof(buf), "cdev=%s", cp->provider->name);
311 devctl_notify_f("GEOM", "DEV", "SIZECHANGE", buf, M_WAITOK);
315 g_dev_getprovider(struct cdev *dev)
317 struct g_consumer *cp;
322 if (dev->si_devsw != &g_dev_cdevsw)
325 return (cp->provider);
328 static struct g_geom *
329 g_dev_taste(struct g_class *mp, struct g_provider *pp, int insist __unused)
332 struct g_geom_alias *gap;
333 struct g_consumer *cp;
334 struct g_dev_softc *sc;
336 struct cdev *dev, *adev;
337 char buf[SPECNAMELEN + 6];
338 struct make_dev_args args;
340 g_trace(G_T_TOPOLOGY, "dev_taste(%s,%s)", mp->name, pp->name);
342 gp = g_new_geomf(mp, "%s", pp->name);
343 sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO);
344 mtx_init(&sc->sc_mtx, "g_dev", NULL, MTX_DEF);
345 cp = g_new_consumer(gp);
347 cp->flags |= G_CF_DIRECT_SEND | G_CF_DIRECT_RECEIVE;
348 error = g_attach(cp, pp);
350 ("g_dev_taste(%s) failed to g_attach, err=%d", pp->name, error));
352 make_dev_args_init(&args);
353 args.mda_flags = MAKEDEV_CHECKNAME | MAKEDEV_WAITOK;
354 args.mda_devsw = &g_dev_cdevsw;
356 args.mda_uid = UID_ROOT;
357 args.mda_gid = GID_OPERATOR;
358 args.mda_mode = 0640;
359 args.mda_si_drv1 = sc;
360 args.mda_si_drv2 = cp;
361 error = make_dev_s(&args, &sc->sc_dev, "%s", gp->name);
363 printf("%s: make_dev_p() failed (gp->name=%s, error=%d)\n",
364 __func__, gp->name, error);
366 g_destroy_consumer(cp);
368 mtx_destroy(&sc->sc_mtx);
373 dev->si_flags |= SI_UNMAPPED;
374 dev->si_iosize_max = MAXPHYS;
375 error = init_dumpdev(dev);
377 printf("%s: init_dumpdev() failed (gp->name=%s, error=%d)\n",
378 __func__, gp->name, error);
380 g_dev_attrchanged(cp, "GEOM::physpath");
381 snprintf(buf, sizeof(buf), "cdev=%s", gp->name);
382 devctl_notify_f("GEOM", "DEV", "CREATE", buf, M_WAITOK);
384 * Now add all the aliases for this drive
386 LIST_FOREACH(gap, &pp->aliases, ga_next) {
387 error = make_dev_alias_p(MAKEDEV_CHECKNAME | MAKEDEV_WAITOK, &adev, dev,
388 "%s", gap->ga_alias);
390 printf("%s: make_dev_alias_p() failed (name=%s, error=%d)\n",
391 __func__, gap->ga_alias, error);
394 snprintf(buf, sizeof(buf), "cdev=%s", gap->ga_alias);
395 devctl_notify_f("GEOM", "DEV", "CREATE", buf, M_WAITOK);
402 g_dev_open(struct cdev *dev, int flags, int fmt, struct thread *td)
404 struct g_consumer *cp;
405 struct g_dev_softc *sc;
409 g_trace(G_T_ACCESS, "g_dev_open(%s, %d, %d, %p)",
410 cp->geom->name, flags, fmt, td);
412 r = flags & FREAD ? 1 : 0;
413 w = flags & FWRITE ? 1 : 0;
415 e = flags & O_EXCL ? 1 : 0;
421 * This happens on attempt to open a device node with O_EXEC.
428 * When running in very secure mode, do not allow
429 * opens for writing of any disks.
431 error = securelevel_ge(td->td_ucred, 2);
436 error = g_access(cp, r, w, e);
440 mtx_lock(&sc->sc_mtx);
441 if (sc->sc_open == 0 && (sc->sc_active & SC_A_ACTIVE) != 0)
442 wakeup(&sc->sc_active);
443 sc->sc_open += r + w + e;
444 if (sc->sc_open == 0)
445 atomic_clear_int(&sc->sc_active, SC_A_OPEN);
447 atomic_set_int(&sc->sc_active, SC_A_OPEN);
448 mtx_unlock(&sc->sc_mtx);
454 g_dev_close(struct cdev *dev, int flags, int fmt, struct thread *td)
456 struct g_consumer *cp;
457 struct g_dev_softc *sc;
461 g_trace(G_T_ACCESS, "g_dev_close(%s, %d, %d, %p)",
462 cp->geom->name, flags, fmt, td);
464 r = flags & FREAD ? -1 : 0;
465 w = flags & FWRITE ? -1 : 0;
467 e = flags & O_EXCL ? -1 : 0;
473 * The vgonel(9) - caused by eg. forced unmount of devfs - calls
474 * VOP_CLOSE(9) on devfs vnode without any FREAD or FWRITE flags,
475 * which would result in zero deltas, which in turn would cause
476 * panic in g_access(9).
478 * Note that we cannot zero the counters (ie. do "r = cp->acr"
479 * etc) instead, because the consumer might be opened in another
486 mtx_lock(&sc->sc_mtx);
487 sc->sc_open += r + w + e;
488 if (sc->sc_open == 0)
489 atomic_clear_int(&sc->sc_active, SC_A_OPEN);
491 atomic_set_int(&sc->sc_active, SC_A_OPEN);
492 while (sc->sc_open == 0 && (sc->sc_active & SC_A_ACTIVE) != 0)
493 msleep(&sc->sc_active, &sc->sc_mtx, 0, "g_dev_close", hz / 10);
494 mtx_unlock(&sc->sc_mtx);
496 error = g_access(cp, r, w, e);
502 g_dev_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag, struct thread *td)
504 struct g_consumer *cp;
505 struct g_provider *pp;
506 off_t offset, length, chunk, odd;
508 #ifdef COMPAT_FREEBSD12
509 struct diocskerneldump_arg kda_copy;
515 /* If consumer or provider is dying, don't disturb. */
516 if (cp->flags & G_CF_ORPHAN)
522 KASSERT(cp->acr || cp->acw,
523 ("Consumer with zero access count in g_dev_ioctl"));
525 i = IOCPARM_LEN(cmd);
527 case DIOCGSECTORSIZE:
528 *(u_int *)data = pp->sectorsize;
529 if (*(u_int *)data == 0)
533 *(off_t *)data = pp->mediasize;
534 if (*(off_t *)data == 0)
538 error = g_io_getattr("GEOM::fwsectors", cp, &i, data);
539 if (error == 0 && *(u_int *)data == 0)
543 error = g_io_getattr("GEOM::fwheads", cp, &i, data);
544 if (error == 0 && *(u_int *)data == 0)
547 case DIOCGFRONTSTUFF:
548 error = g_io_getattr("GEOM::frontstuff", cp, &i, data);
550 #ifdef COMPAT_FREEBSD11
551 case DIOCSKERNELDUMP_FREEBSD11:
553 struct diocskerneldump_arg kda;
555 gone_in(13, "FreeBSD 11.x ABI compat");
557 bzero(&kda, sizeof(kda));
558 kda.kda_encryption = KERNELDUMP_ENC_NONE;
559 kda.kda_index = (*(u_int *)data ? 0 : KDA_REMOVE_ALL);
560 if (kda.kda_index == KDA_REMOVE_ALL)
561 error = dumper_remove(devtoname(dev), &kda);
563 error = g_dev_setdumpdev(dev, &kda);
567 #ifdef COMPAT_FREEBSD12
568 case DIOCSKERNELDUMP_FREEBSD12:
570 struct diocskerneldump_arg_freebsd12 *kda12;
572 gone_in(14, "FreeBSD 12.x ABI compat");
574 kda12 = (void *)data;
575 memcpy(&kda_copy, kda12, sizeof(kda_copy));
576 kda_copy.kda_index = (kda12->kda12_enable ?
579 explicit_bzero(kda12, sizeof(*kda12));
580 /* Kludge to pass kda_copy to kda in fallthrough. */
581 data = (void *)&kda_copy;
585 case DIOCSKERNELDUMP:
587 struct diocskerneldump_arg *kda;
588 uint8_t *encryptedkey;
590 kda = (struct diocskerneldump_arg *)data;
591 if (kda->kda_index == KDA_REMOVE_ALL ||
592 kda->kda_index == KDA_REMOVE_DEV ||
593 kda->kda_index == KDA_REMOVE) {
594 error = dumper_remove(devtoname(dev), kda);
595 explicit_bzero(kda, sizeof(*kda));
599 if (kda->kda_encryption != KERNELDUMP_ENC_NONE) {
600 if (kda->kda_encryptedkeysize == 0 ||
601 kda->kda_encryptedkeysize >
602 KERNELDUMP_ENCKEY_MAX_SIZE) {
603 explicit_bzero(kda, sizeof(*kda));
606 encryptedkey = malloc(kda->kda_encryptedkeysize, M_TEMP,
608 error = copyin(kda->kda_encryptedkey, encryptedkey,
609 kda->kda_encryptedkeysize);
614 kda->kda_encryptedkey = encryptedkey;
615 error = g_dev_setdumpdev(dev, kda);
617 zfree(encryptedkey, M_TEMP);
618 explicit_bzero(kda, sizeof(*kda));
622 error = g_io_flush(cp);
625 offset = ((off_t *)data)[0];
626 length = ((off_t *)data)[1];
627 if ((offset % pp->sectorsize) != 0 ||
628 (length % pp->sectorsize) != 0 || length <= 0) {
629 printf("%s: offset=%jd length=%jd\n", __func__, offset,
634 if ((pp->mediasize > 0) && (offset >= pp->mediasize)) {
636 * Catch out-of-bounds requests here. The problem is
637 * that due to historical GEOM I/O implementation
638 * peculatities, g_delete_data() would always return
639 * success for requests starting just the next byte
640 * after providers media boundary. Condition check on
641 * non-zero media size, since that condition would
642 * (most likely) cause ENXIO instead.
649 if (g_dev_del_max_sectors != 0 &&
650 chunk > g_dev_del_max_sectors * pp->sectorsize) {
651 chunk = g_dev_del_max_sectors * pp->sectorsize;
652 if (pp->stripesize > 0) {
653 odd = (offset + chunk +
654 pp->stripeoffset) % pp->stripesize;
659 error = g_delete_data(cp, offset, chunk);
665 * Since the request size can be large, the service
666 * time can be is likewise. We make this ioctl
667 * interruptible by checking for signals for each bio.
674 error = g_io_getattr("GEOM::ident", cp, &i, data);
676 case DIOCGPROVIDERNAME:
677 strlcpy(data, pp->name, i);
679 case DIOCGSTRIPESIZE:
680 *(off_t *)data = pp->stripesize;
682 case DIOCGSTRIPEOFFSET:
683 *(off_t *)data = pp->stripeoffset;
686 error = g_io_getattr("GEOM::physpath", cp, &i, data);
687 if (error == 0 && *(char *)data == '\0')
691 struct diocgattr_arg *arg = (struct diocgattr_arg *)data;
693 if (arg->len > sizeof(arg->value)) {
697 error = g_io_getattr(arg->name, cp, &arg->len, &arg->value);
701 struct disk_zone_args *zone_args =(struct disk_zone_args *)data;
702 struct disk_zone_rep_entry *new_entries, *old_entries;
703 struct disk_zone_report *rep;
711 if (zone_args->zone_cmd == DISK_ZONE_REPORT_ZONES) {
712 rep = &zone_args->zone_params.report;
713 #define MAXENTRIES (MAXPHYS / sizeof(struct disk_zone_rep_entry))
714 if (rep->entries_allocated > MAXENTRIES)
715 rep->entries_allocated = MAXENTRIES;
716 alloc_size = rep->entries_allocated *
717 sizeof(struct disk_zone_rep_entry);
719 new_entries = g_malloc(alloc_size,
721 old_entries = rep->entries;
722 rep->entries = new_entries;
724 error = g_io_zonecmd(zone_args, cp);
725 if (zone_args->zone_cmd == DISK_ZONE_REPORT_ZONES &&
726 alloc_size != 0 && error == 0)
727 error = copyout(new_entries, old_entries, alloc_size);
728 if (old_entries != NULL && rep != NULL)
729 rep->entries = old_entries;
730 if (new_entries != NULL)
735 if (pp->geom->ioctl != NULL) {
736 error = pp->geom->ioctl(pp, cmd, data, fflag, td);
746 g_dev_done(struct bio *bp2)
748 struct g_consumer *cp;
749 struct g_dev_softc *sc;
755 bp = bp2->bio_parent;
756 bp->bio_error = bp2->bio_error;
757 bp->bio_completed = bp2->bio_completed;
758 bp->bio_resid = bp->bio_length - bp2->bio_completed;
759 if (bp2->bio_cmd == BIO_ZONE)
760 bcopy(&bp2->bio_zone, &bp->bio_zone, sizeof(bp->bio_zone));
762 if (bp2->bio_error != 0) {
763 g_trace(G_T_BIO, "g_dev_done(%p) had error %d",
764 bp2, bp2->bio_error);
765 bp->bio_flags |= BIO_ERROR;
767 g_trace(G_T_BIO, "g_dev_done(%p/%p) resid %ld completed %jd",
768 bp2, bp, bp2->bio_resid, (intmax_t)bp2->bio_completed);
771 active = atomic_fetchadd_int(&sc->sc_active, -1) - 1;
772 if ((active & SC_A_ACTIVE) == 0) {
773 if ((active & SC_A_OPEN) == 0)
774 wakeup(&sc->sc_active);
775 if (active & SC_A_DESTROY)
776 g_post_event(g_dev_destroy, cp, M_NOWAIT, NULL);
782 g_dev_strategy(struct bio *bp)
784 struct g_consumer *cp;
787 struct g_dev_softc *sc;
789 KASSERT(bp->bio_cmd == BIO_READ ||
790 bp->bio_cmd == BIO_WRITE ||
791 bp->bio_cmd == BIO_DELETE ||
792 bp->bio_cmd == BIO_FLUSH ||
793 bp->bio_cmd == BIO_ZONE,
794 ("Wrong bio_cmd bio=%p cmd=%d", bp, bp->bio_cmd));
797 KASSERT(cp->acr || cp->acw,
798 ("Consumer with zero access count in g_dev_strategy"));
799 biotrack(bp, __func__);
801 if ((bp->bio_offset % cp->provider->sectorsize) != 0 ||
802 (bp->bio_bcount % cp->provider->sectorsize) != 0) {
803 bp->bio_resid = bp->bio_bcount;
804 biofinish(bp, NULL, EINVAL);
809 KASSERT(sc->sc_open > 0, ("Closed device in g_dev_strategy"));
810 atomic_add_int(&sc->sc_active, 1);
814 * XXX: This is not an ideal solution, but I believe it to
815 * XXX: deadlock safely, all things considered.
817 bp2 = g_clone_bio(bp);
820 pause("gdstrat", hz / 10);
822 KASSERT(bp2 != NULL, ("XXX: ENOMEM in a bad place"));
823 bp2->bio_done = g_dev_done;
825 "g_dev_strategy(%p/%p) offset %jd length %jd data %p cmd %d",
826 bp, bp2, (intmax_t)bp->bio_offset, (intmax_t)bp2->bio_length,
827 bp2->bio_data, bp2->bio_cmd);
828 g_io_request(bp2, cp);
829 KASSERT(cp->acr || cp->acw,
830 ("g_dev_strategy raced with g_dev_close and lost"));
837 * Called by devfs when asynchronous device destruction is completed.
838 * - Mark that we have no attached device any more.
839 * - If there are no outstanding requests, schedule geom destruction.
840 * Otherwise destruction will be scheduled later by g_dev_done().
844 g_dev_callback(void *arg)
846 struct g_consumer *cp;
847 struct g_dev_softc *sc;
852 g_trace(G_T_TOPOLOGY, "g_dev_callback(%p(%s))", cp, cp->geom->name);
856 active = atomic_fetchadd_int(&sc->sc_active, SC_A_DESTROY);
857 if ((active & SC_A_ACTIVE) == 0)
858 g_post_event(g_dev_destroy, cp, M_WAITOK, NULL);
864 * Called from below when the provider orphaned us.
865 * - Clear any dump settings.
866 * - Request asynchronous device destruction to prevent any more requests
867 * from coming in. The provider is already marked with an error, so
868 * anything which comes in the interim will be returned immediately.
872 g_dev_orphan(struct g_consumer *cp)
875 struct g_dev_softc *sc;
880 g_trace(G_T_TOPOLOGY, "g_dev_orphan(%p(%s))", cp, cp->geom->name);
882 /* Reset any dump-area set on this device */
883 if (dev->si_flags & SI_DUMPDEV) {
884 struct diocskerneldump_arg kda;
886 bzero(&kda, sizeof(kda));
887 kda.kda_index = KDA_REMOVE_DEV;
888 (void)dumper_remove(devtoname(dev), &kda);
891 /* Destroy the struct cdev *so we get no more requests */
893 destroy_dev_sched_cb(dev, g_dev_callback, cp);
896 DECLARE_GEOM_CLASS(g_dev_class, g_dev);