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 <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/malloc.h> 42 #include <sys/kernel.h> 43 #include <sys/conf.h> 44 #include <sys/ctype.h> 45 #include <sys/bio.h> 46 #include <sys/bus.h> 47 #include <sys/lock.h> 48 #include <sys/mutex.h> 49 #include <sys/proc.h> 50 #include <sys/errno.h> 51 #include <sys/time.h> 52 #include <sys/disk.h> 53 #include <sys/fcntl.h> 54 #include <sys/limits.h> 55 #include <sys/sysctl.h> 56 #include <geom/geom.h> 57 #include <geom/geom_int.h> 58 #include <machine/stdarg.h> 59 60 struct g_dev_softc { 61 struct mtx sc_mtx; 62 struct cdev *sc_dev; 63 struct cdev *sc_alias; 64 int sc_open; 65 int sc_active; 66 }; 67 68 static d_open_t g_dev_open; 69 static d_close_t g_dev_close; 70 static d_strategy_t g_dev_strategy; 71 static d_ioctl_t g_dev_ioctl; 72 73 static struct cdevsw g_dev_cdevsw = { 74 .d_version = D_VERSION, 75 .d_open = g_dev_open, 76 .d_close = g_dev_close, 77 .d_read = physread, 78 .d_write = physwrite, 79 .d_ioctl = g_dev_ioctl, 80 .d_strategy = g_dev_strategy, 81 .d_name = "g_dev", 82 .d_flags = D_DISK | D_TRACKCLOSE, 83 }; 84 85 static g_init_t g_dev_init; 86 static g_fini_t g_dev_fini; 87 static g_taste_t g_dev_taste; 88 static g_orphan_t g_dev_orphan; 89 static g_attrchanged_t g_dev_attrchanged; 90 91 static struct g_class g_dev_class = { 92 .name = "DEV", 93 .version = G_VERSION, 94 .init = g_dev_init, 95 .fini = g_dev_fini, 96 .taste = g_dev_taste, 97 .orphan = g_dev_orphan, 98 .attrchanged = g_dev_attrchanged 99 }; 100 101 /* 102 * We target 262144 (8 x 32768) sectors by default as this significantly 103 * increases the throughput on commonly used SSD's with a marginal 104 * increase in non-interruptible request latency. 105 */ 106 static uint64_t g_dev_del_max_sectors = 262144; 107 SYSCTL_DECL(_kern_geom); 108 SYSCTL_NODE(_kern_geom, OID_AUTO, dev, CTLFLAG_RW, 0, "GEOM_DEV stuff"); 109 SYSCTL_QUAD(_kern_geom_dev, OID_AUTO, delete_max_sectors, CTLFLAG_RW, 110 &g_dev_del_max_sectors, 0, "Maximum number of sectors in a single " 111 "delete request sent to the provider. Larger requests are chunked " 112 "so they can be interrupted. (0 = disable chunking)"); 113 114 static char *dumpdev = NULL; 115 static void 116 g_dev_init(struct g_class *mp) 117 { 118 119 dumpdev = kern_getenv("dumpdev"); 120 } 121 122 static void 123 g_dev_fini(struct g_class *mp) 124 { 125 126 freeenv(dumpdev); 127 } 128 129 static int 130 g_dev_setdumpdev(struct cdev *dev, struct thread *td) 131 { 132 struct g_kerneldump kd; 133 struct g_consumer *cp; 134 int error, len; 135 136 if (dev == NULL) 137 return (set_dumper(NULL, NULL, td)); 138 139 cp = dev->si_drv2; 140 len = sizeof(kd); 141 kd.offset = 0; 142 kd.length = OFF_MAX; 143 error = g_io_getattr("GEOM::kerneldump", cp, &len, &kd); 144 if (error == 0) { 145 error = set_dumper(&kd.di, devtoname(dev), td); 146 if (error == 0) 147 dev->si_flags |= SI_DUMPDEV; 148 } 149 return (error); 150 } 151 152 static void 153 init_dumpdev(struct cdev *dev) 154 { 155 156 if (dumpdev == NULL) 157 return; 158 if (strcmp(devtoname(dev), dumpdev) != 0) 159 return; 160 if (g_dev_setdumpdev(dev, curthread) == 0) { 161 freeenv(dumpdev); 162 dumpdev = NULL; 163 } 164 } 165 166 static void 167 g_dev_destroy(void *arg, int flags __unused) 168 { 169 struct g_consumer *cp; 170 struct g_geom *gp; 171 struct g_dev_softc *sc; 172 173 g_topology_assert(); 174 cp = arg; 175 gp = cp->geom; 176 sc = cp->private; 177 g_trace(G_T_TOPOLOGY, "g_dev_destroy(%p(%s))", cp, gp->name); 178 if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0) 179 g_access(cp, -cp->acr, -cp->acw, -cp->ace); 180 g_detach(cp); 181 g_destroy_consumer(cp); 182 g_destroy_geom(gp); 183 mtx_destroy(&sc->sc_mtx); 184 g_free(sc); 185 } 186 187 void 188 g_dev_print(void) 189 { 190 struct g_geom *gp; 191 char const *p = ""; 192 193 LIST_FOREACH(gp, &g_dev_class.geom, geom) { 194 printf("%s%s", p, gp->name); 195 p = " "; 196 } 197 printf("\n"); 198 } 199 200 static void 201 g_dev_attrchanged(struct g_consumer *cp, const char *attr) 202 { 203 struct g_dev_softc *sc; 204 struct cdev *dev; 205 char buf[SPECNAMELEN + 6]; 206 207 sc = cp->private; 208 if (strcmp(attr, "GEOM::media") == 0) { 209 dev = sc->sc_dev; 210 snprintf(buf, sizeof(buf), "cdev=%s", dev->si_name); 211 devctl_notify_f("DEVFS", "CDEV", "MEDIACHANGE", buf, M_WAITOK); 212 dev = sc->sc_alias; 213 if (dev != NULL) { 214 snprintf(buf, sizeof(buf), "cdev=%s", dev->si_name); 215 devctl_notify_f("DEVFS", "CDEV", "MEDIACHANGE", buf, 216 M_WAITOK); 217 } 218 return; 219 } 220 221 if (strcmp(attr, "GEOM::physpath") != 0) 222 return; 223 224 if (g_access(cp, 1, 0, 0) == 0) { 225 char *physpath; 226 int error, physpath_len; 227 228 physpath_len = MAXPATHLEN; 229 physpath = g_malloc(physpath_len, M_WAITOK|M_ZERO); 230 error = 231 g_io_getattr("GEOM::physpath", cp, &physpath_len, physpath); 232 g_access(cp, -1, 0, 0); 233 if (error == 0 && strlen(physpath) != 0) { 234 struct cdev *old_alias_dev; 235 struct cdev **alias_devp; 236 237 dev = sc->sc_dev; 238 old_alias_dev = sc->sc_alias; 239 alias_devp = (struct cdev **)&sc->sc_alias; 240 make_dev_physpath_alias(MAKEDEV_WAITOK, alias_devp, 241 dev, old_alias_dev, physpath); 242 } else if (sc->sc_alias) { 243 destroy_dev((struct cdev *)sc->sc_alias); 244 sc->sc_alias = NULL; 245 } 246 g_free(physpath); 247 } 248 } 249 250 struct g_provider * 251 g_dev_getprovider(struct cdev *dev) 252 { 253 struct g_consumer *cp; 254 255 g_topology_assert(); 256 if (dev == NULL) 257 return (NULL); 258 if (dev->si_devsw != &g_dev_cdevsw) 259 return (NULL); 260 cp = dev->si_drv2; 261 return (cp->provider); 262 } 263 264 static struct g_geom * 265 g_dev_taste(struct g_class *mp, struct g_provider *pp, int insist __unused) 266 { 267 struct g_geom *gp; 268 struct g_consumer *cp; 269 struct g_dev_softc *sc; 270 int error, len; 271 struct cdev *dev, *adev; 272 char buf[64], *val; 273 274 g_trace(G_T_TOPOLOGY, "dev_taste(%s,%s)", mp->name, pp->name); 275 g_topology_assert(); 276 gp = g_new_geomf(mp, "%s", pp->name); 277 sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO); 278 mtx_init(&sc->sc_mtx, "g_dev", NULL, MTX_DEF); 279 cp = g_new_consumer(gp); 280 cp->private = sc; 281 cp->flags |= G_CF_DIRECT_SEND | G_CF_DIRECT_RECEIVE; 282 error = g_attach(cp, pp); 283 KASSERT(error == 0, 284 ("g_dev_taste(%s) failed to g_attach, err=%d", pp->name, error)); 285 error = make_dev_p(MAKEDEV_CHECKNAME | MAKEDEV_WAITOK, &dev, 286 &g_dev_cdevsw, NULL, UID_ROOT, GID_OPERATOR, 0640, "%s", gp->name); 287 if (error != 0) { 288 printf("%s: make_dev_p() failed (gp->name=%s, error=%d)\n", 289 __func__, gp->name, error); 290 g_detach(cp); 291 g_destroy_consumer(cp); 292 g_destroy_geom(gp); 293 mtx_destroy(&sc->sc_mtx); 294 g_free(sc); 295 return (NULL); 296 } 297 dev->si_flags |= SI_UNMAPPED; 298 sc->sc_dev = dev; 299 300 /* Search for device alias name and create it if found. */ 301 adev = NULL; 302 for (len = MIN(strlen(gp->name), sizeof(buf) - 15); len > 0; len--) { 303 snprintf(buf, sizeof(buf), "kern.devalias.%s", gp->name); 304 buf[14 + len] = 0; 305 val = kern_getenv(buf); 306 if (val != NULL) { 307 snprintf(buf, sizeof(buf), "%s%s", 308 val, gp->name + len); 309 freeenv(val); 310 if ((make_dev_alias_p(MAKEDEV_CHECKNAME|MAKEDEV_WAITOK, 311 &adev, dev, "%s", buf)) != 0) 312 printf("Warning: unable to create device " 313 "alias %s\n", buf); 314 break; 315 } 316 } 317 318 dev->si_iosize_max = MAXPHYS; 319 dev->si_drv2 = cp; 320 init_dumpdev(dev); 321 if (adev != NULL) { 322 adev->si_iosize_max = MAXPHYS; 323 adev->si_drv2 = cp; 324 adev->si_flags |= SI_UNMAPPED; 325 init_dumpdev(adev); 326 } 327 328 g_dev_attrchanged(cp, "GEOM::physpath"); 329 330 return (gp); 331 } 332 333 static int 334 g_dev_open(struct cdev *dev, int flags, int fmt, struct thread *td) 335 { 336 struct g_consumer *cp; 337 struct g_dev_softc *sc; 338 int error, r, w, e; 339 340 cp = dev->si_drv2; 341 if (cp == NULL) 342 return (ENXIO); /* g_dev_taste() not done yet */ 343 g_trace(G_T_ACCESS, "g_dev_open(%s, %d, %d, %p)", 344 cp->geom->name, flags, fmt, td); 345 346 r = flags & FREAD ? 1 : 0; 347 w = flags & FWRITE ? 1 : 0; 348 #ifdef notyet 349 e = flags & O_EXCL ? 1 : 0; 350 #else 351 e = 0; 352 #endif 353 if (w) { 354 /* 355 * When running in very secure mode, do not allow 356 * opens for writing of any disks. 357 */ 358 error = securelevel_ge(td->td_ucred, 2); 359 if (error) 360 return (error); 361 } 362 g_topology_lock(); 363 error = g_access(cp, r, w, e); 364 g_topology_unlock(); 365 if (error == 0) { 366 sc = cp->private; 367 mtx_lock(&sc->sc_mtx); 368 if (sc->sc_open == 0 && sc->sc_active != 0) 369 wakeup(&sc->sc_active); 370 sc->sc_open += r + w + e; 371 mtx_unlock(&sc->sc_mtx); 372 } 373 return (error); 374 } 375 376 static int 377 g_dev_close(struct cdev *dev, int flags, int fmt, struct thread *td) 378 { 379 struct g_consumer *cp; 380 struct g_dev_softc *sc; 381 int error, r, w, e; 382 383 cp = dev->si_drv2; 384 if (cp == NULL) 385 return (ENXIO); 386 g_trace(G_T_ACCESS, "g_dev_close(%s, %d, %d, %p)", 387 cp->geom->name, flags, fmt, td); 388 389 r = flags & FREAD ? -1 : 0; 390 w = flags & FWRITE ? -1 : 0; 391 #ifdef notyet 392 e = flags & O_EXCL ? -1 : 0; 393 #else 394 e = 0; 395 #endif 396 sc = cp->private; 397 mtx_lock(&sc->sc_mtx); 398 sc->sc_open += r + w + e; 399 while (sc->sc_open == 0 && sc->sc_active != 0) 400 msleep(&sc->sc_active, &sc->sc_mtx, 0, "PRIBIO", 0); 401 mtx_unlock(&sc->sc_mtx); 402 g_topology_lock(); 403 error = g_access(cp, r, w, e); 404 g_topology_unlock(); 405 return (error); 406 } 407 408 /* 409 * XXX: Until we have unmessed the ioctl situation, there is a race against 410 * XXX: a concurrent orphanization. We cannot close it by holding topology 411 * XXX: since that would prevent us from doing our job, and stalling events 412 * XXX: will break (actually: stall) the BSD disklabel hacks. 413 */ 414 static int 415 g_dev_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag, struct thread *td) 416 { 417 struct g_consumer *cp; 418 struct g_provider *pp; 419 off_t offset, length, chunk; 420 int i, error; 421 422 cp = dev->si_drv2; 423 pp = cp->provider; 424 425 error = 0; 426 KASSERT(cp->acr || cp->acw, 427 ("Consumer with zero access count in g_dev_ioctl")); 428 429 i = IOCPARM_LEN(cmd); 430 switch (cmd) { 431 case DIOCGSECTORSIZE: 432 *(u_int *)data = cp->provider->sectorsize; 433 if (*(u_int *)data == 0) 434 error = ENOENT; 435 break; 436 case DIOCGMEDIASIZE: 437 *(off_t *)data = cp->provider->mediasize; 438 if (*(off_t *)data == 0) 439 error = ENOENT; 440 break; 441 case DIOCGFWSECTORS: 442 error = g_io_getattr("GEOM::fwsectors", cp, &i, data); 443 if (error == 0 && *(u_int *)data == 0) 444 error = ENOENT; 445 break; 446 case DIOCGFWHEADS: 447 error = g_io_getattr("GEOM::fwheads", cp, &i, data); 448 if (error == 0 && *(u_int *)data == 0) 449 error = ENOENT; 450 break; 451 case DIOCGFRONTSTUFF: 452 error = g_io_getattr("GEOM::frontstuff", cp, &i, data); 453 break; 454 case DIOCSKERNELDUMP: 455 if (*(u_int *)data == 0) 456 error = g_dev_setdumpdev(NULL, td); 457 else 458 error = g_dev_setdumpdev(dev, td); 459 break; 460 case DIOCGFLUSH: 461 error = g_io_flush(cp); 462 break; 463 case DIOCGDELETE: 464 offset = ((off_t *)data)[0]; 465 length = ((off_t *)data)[1]; 466 if ((offset % cp->provider->sectorsize) != 0 || 467 (length % cp->provider->sectorsize) != 0 || length <= 0) { 468 printf("%s: offset=%jd length=%jd\n", __func__, offset, 469 length); 470 error = EINVAL; 471 break; 472 } 473 while (length > 0) { 474 chunk = length; 475 if (g_dev_del_max_sectors != 0 && chunk > 476 g_dev_del_max_sectors * cp->provider->sectorsize) { 477 chunk = g_dev_del_max_sectors * 478 cp->provider->sectorsize; 479 } 480 error = g_delete_data(cp, offset, chunk); 481 length -= chunk; 482 offset += chunk; 483 if (error) 484 break; 485 /* 486 * Since the request size can be large, the service 487 * time can be is likewise. We make this ioctl 488 * interruptible by checking for signals for each bio. 489 */ 490 if (SIGPENDING(td)) 491 break; 492 } 493 break; 494 case DIOCGIDENT: 495 error = g_io_getattr("GEOM::ident", cp, &i, data); 496 break; 497 case DIOCGPROVIDERNAME: 498 if (pp == NULL) 499 return (ENOENT); 500 strlcpy(data, pp->name, i); 501 break; 502 case DIOCGSTRIPESIZE: 503 *(off_t *)data = cp->provider->stripesize; 504 break; 505 case DIOCGSTRIPEOFFSET: 506 *(off_t *)data = cp->provider->stripeoffset; 507 break; 508 case DIOCGPHYSPATH: 509 error = g_io_getattr("GEOM::physpath", cp, &i, data); 510 if (error == 0 && *(char *)data == '\0') 511 error = ENOENT; 512 break; 513 case DIOCGATTR: { 514 struct diocgattr_arg *arg = (struct diocgattr_arg *)data; 515 516 if (arg->len > sizeof(arg->value)) { 517 error = EINVAL; 518 break; 519 } 520 error = g_io_getattr(arg->name, cp, &arg->len, &arg->value); 521 break; 522 } 523 default: 524 if (cp->provider->geom->ioctl != NULL) { 525 error = cp->provider->geom->ioctl(cp->provider, cmd, data, fflag, td); 526 } else { 527 error = ENOIOCTL; 528 } 529 } 530 531 return (error); 532 } 533 534 static void 535 g_dev_done(struct bio *bp2) 536 { 537 struct g_consumer *cp; 538 struct g_dev_softc *sc; 539 struct bio *bp; 540 int destroy; 541 542 cp = bp2->bio_from; 543 sc = cp->private; 544 bp = bp2->bio_parent; 545 bp->bio_error = bp2->bio_error; 546 bp->bio_completed = bp2->bio_completed; 547 bp->bio_resid = bp->bio_length - bp2->bio_completed; 548 if (bp2->bio_error != 0) { 549 g_trace(G_T_BIO, "g_dev_done(%p) had error %d", 550 bp2, bp2->bio_error); 551 bp->bio_flags |= BIO_ERROR; 552 } else { 553 g_trace(G_T_BIO, "g_dev_done(%p/%p) resid %ld completed %jd", 554 bp2, bp, bp2->bio_resid, (intmax_t)bp2->bio_completed); 555 } 556 g_destroy_bio(bp2); 557 destroy = 0; 558 mtx_lock(&sc->sc_mtx); 559 if ((--sc->sc_active) == 0) { 560 if (sc->sc_open == 0) 561 wakeup(&sc->sc_active); 562 if (sc->sc_dev == NULL) 563 destroy = 1; 564 } 565 mtx_unlock(&sc->sc_mtx); 566 if (destroy) 567 g_post_event(g_dev_destroy, cp, M_WAITOK, NULL); 568 biodone(bp); 569 } 570 571 static void 572 g_dev_strategy(struct bio *bp) 573 { 574 struct g_consumer *cp; 575 struct bio *bp2; 576 struct cdev *dev; 577 struct g_dev_softc *sc; 578 579 KASSERT(bp->bio_cmd == BIO_READ || 580 bp->bio_cmd == BIO_WRITE || 581 bp->bio_cmd == BIO_DELETE || 582 bp->bio_cmd == BIO_FLUSH, 583 ("Wrong bio_cmd bio=%p cmd=%d", bp, bp->bio_cmd)); 584 dev = bp->bio_dev; 585 cp = dev->si_drv2; 586 sc = cp->private; 587 KASSERT(cp->acr || cp->acw, 588 ("Consumer with zero access count in g_dev_strategy")); 589 #ifdef INVARIANTS 590 if ((bp->bio_offset % cp->provider->sectorsize) != 0 || 591 (bp->bio_bcount % cp->provider->sectorsize) != 0) { 592 bp->bio_resid = bp->bio_bcount; 593 biofinish(bp, NULL, EINVAL); 594 return; 595 } 596 #endif 597 mtx_lock(&sc->sc_mtx); 598 KASSERT(sc->sc_open > 0, ("Closed device in g_dev_strategy")); 599 sc->sc_active++; 600 mtx_unlock(&sc->sc_mtx); 601 602 for (;;) { 603 /* 604 * XXX: This is not an ideal solution, but I belive it to 605 * XXX: deadlock safe, all things considered. 606 */ 607 bp2 = g_clone_bio(bp); 608 if (bp2 != NULL) 609 break; 610 pause("gdstrat", hz / 10); 611 } 612 KASSERT(bp2 != NULL, ("XXX: ENOMEM in a bad place")); 613 bp2->bio_done = g_dev_done; 614 g_trace(G_T_BIO, 615 "g_dev_strategy(%p/%p) offset %jd length %jd data %p cmd %d", 616 bp, bp2, (intmax_t)bp->bio_offset, (intmax_t)bp2->bio_length, 617 bp2->bio_data, bp2->bio_cmd); 618 g_io_request(bp2, cp); 619 KASSERT(cp->acr || cp->acw, 620 ("g_dev_strategy raced with g_dev_close and lost")); 621 622 } 623 624 /* 625 * g_dev_callback() 626 * 627 * Called by devfs when asynchronous device destruction is completed. 628 * - Mark that we have no attached device any more. 629 * - If there are no outstanding requests, schedule geom destruction. 630 * Otherwise destruction will be scheduled later by g_dev_done(). 631 */ 632 633 static void 634 g_dev_callback(void *arg) 635 { 636 struct g_consumer *cp; 637 struct g_dev_softc *sc; 638 int destroy; 639 640 cp = arg; 641 sc = cp->private; 642 g_trace(G_T_TOPOLOGY, "g_dev_callback(%p(%s))", cp, cp->geom->name); 643 644 mtx_lock(&sc->sc_mtx); 645 sc->sc_dev = NULL; 646 sc->sc_alias = NULL; 647 destroy = (sc->sc_active == 0); 648 mtx_unlock(&sc->sc_mtx); 649 if (destroy) 650 g_post_event(g_dev_destroy, cp, M_WAITOK, NULL); 651 } 652 653 /* 654 * g_dev_orphan() 655 * 656 * Called from below when the provider orphaned us. 657 * - Clear any dump settings. 658 * - Request asynchronous device destruction to prevent any more requests 659 * from coming in. The provider is already marked with an error, so 660 * anything which comes in in the interrim will be returned immediately. 661 */ 662 663 static void 664 g_dev_orphan(struct g_consumer *cp) 665 { 666 struct cdev *dev; 667 struct g_dev_softc *sc; 668 669 g_topology_assert(); 670 sc = cp->private; 671 dev = sc->sc_dev; 672 g_trace(G_T_TOPOLOGY, "g_dev_orphan(%p(%s))", cp, cp->geom->name); 673 674 /* Reset any dump-area set on this device */ 675 if (dev->si_flags & SI_DUMPDEV) 676 (void)set_dumper(NULL, NULL, curthread); 677 678 /* Destroy the struct cdev *so we get no more requests */ 679 destroy_dev_sched_cb(dev, g_dev_callback, cp); 680 } 681 682 DECLARE_GEOM_CLASS(g_dev_class, g_dev); 683