1 /*- 2 * Copyright (c) 2004 Pawel Jakub Dawidek <pjd@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #include <sys/param.h> 30 #include <sys/systm.h> 31 #include <sys/bio.h> 32 #include <sys/conf.h> 33 #include <sys/kernel.h> 34 #include <sys/kthread.h> 35 #include <sys/fcntl.h> 36 #include <sys/linker.h> 37 #include <sys/lock.h> 38 #include <sys/malloc.h> 39 #include <sys/mutex.h> 40 #include <sys/proc.h> 41 #include <sys/limits.h> 42 #include <sys/queue.h> 43 #include <sys/sysctl.h> 44 #include <sys/signalvar.h> 45 #include <sys/time.h> 46 #include <machine/atomic.h> 47 48 #include <geom/geom.h> 49 #include <geom/gate/g_gate.h> 50 51 static MALLOC_DEFINE(M_GATE, "gg data", "GEOM Gate Data"); 52 53 SYSCTL_DECL(_kern_geom); 54 SYSCTL_NODE(_kern_geom, OID_AUTO, gate, CTLFLAG_RW, 0, "GEOM_GATE stuff"); 55 static u_int g_gate_debug = 0; 56 SYSCTL_UINT(_kern_geom_gate, OID_AUTO, debug, CTLFLAG_RW, &g_gate_debug, 0, 57 "Debug level"); 58 59 static int g_gate_destroy_geom(struct gctl_req *, struct g_class *, 60 struct g_geom *); 61 struct g_class g_gate_class = { 62 .name = G_GATE_CLASS_NAME, 63 .version = G_VERSION, 64 .destroy_geom = g_gate_destroy_geom 65 }; 66 67 static struct cdev *status_dev; 68 static d_ioctl_t g_gate_ioctl; 69 static struct cdevsw g_gate_cdevsw = { 70 .d_version = D_VERSION, 71 .d_ioctl = g_gate_ioctl, 72 .d_name = G_GATE_CTL_NAME 73 }; 74 75 76 static LIST_HEAD(, g_gate_softc) g_gate_list = 77 LIST_HEAD_INITIALIZER(&g_gate_list); 78 static struct mtx g_gate_list_mtx; 79 80 81 static void 82 g_gate_wither(struct g_gate_softc *sc) 83 { 84 85 atomic_set_32(&sc->sc_flags, G_GATE_FLAG_DESTROY); 86 } 87 88 static int 89 g_gate_destroy(struct g_gate_softc *sc, boolean_t force) 90 { 91 struct g_provider *pp; 92 struct bio *bp; 93 94 g_topology_assert(); 95 mtx_assert(&g_gate_list_mtx, MA_OWNED); 96 pp = sc->sc_provider; 97 if (!force && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) { 98 mtx_unlock(&g_gate_list_mtx); 99 return (EBUSY); 100 } 101 if ((sc->sc_flags & G_GATE_FLAG_DESTROY) == 0) { 102 g_gate_wither(sc); 103 LIST_REMOVE(sc, sc_next); 104 } 105 mtx_unlock(&g_gate_list_mtx); 106 mtx_lock(&sc->sc_queue_mtx); 107 wakeup(sc); 108 mtx_unlock(&sc->sc_queue_mtx); 109 if (sc->sc_ref > 0) { 110 G_GATE_DEBUG(1, "Cannot destroy %s yet.", sc->sc_name); 111 return (0); 112 } 113 callout_drain(&sc->sc_callout); 114 mtx_lock(&sc->sc_queue_mtx); 115 for (;;) { 116 bp = bioq_first(&sc->sc_inqueue); 117 if (bp != NULL) { 118 bioq_remove(&sc->sc_inqueue, bp); 119 sc->sc_queue_count--; 120 G_GATE_LOGREQ(1, bp, "Request canceled."); 121 g_io_deliver(bp, ENXIO); 122 } else { 123 break; 124 } 125 } 126 for (;;) { 127 bp = bioq_first(&sc->sc_outqueue); 128 if (bp != NULL) { 129 bioq_remove(&sc->sc_outqueue, bp); 130 sc->sc_queue_count--; 131 G_GATE_LOGREQ(1, bp, "Request canceled."); 132 g_io_deliver(bp, ENXIO); 133 } else { 134 break; 135 } 136 } 137 mtx_destroy(&sc->sc_queue_mtx); 138 G_GATE_DEBUG(0, "Device %s destroyed.", sc->sc_name); 139 pp->geom->softc = NULL; 140 g_wither_geom(pp->geom, ENXIO); 141 sc->sc_provider = NULL; 142 free(sc, M_GATE); 143 return (0); 144 } 145 146 static void 147 g_gate_destroy_it(void *arg, int flag __unused) 148 { 149 struct g_gate_softc *sc; 150 151 g_topology_assert(); 152 sc = arg; 153 mtx_lock(&g_gate_list_mtx); 154 g_gate_destroy(sc, 1); 155 } 156 157 static int 158 g_gate_destroy_geom(struct gctl_req *req, struct g_class *mp, struct g_geom *gp) 159 { 160 161 g_topology_assert(); 162 mtx_lock(&g_gate_list_mtx); 163 return (g_gate_destroy(gp->softc, 0)); 164 } 165 166 static int 167 g_gate_access(struct g_provider *pp, int dr, int dw, int de) 168 { 169 struct g_gate_softc *sc; 170 171 if (dr <= 0 && dw <= 0 && de <= 0) 172 return (0); 173 sc = pp->geom->softc; 174 if (sc == NULL || (sc->sc_flags & G_GATE_FLAG_DESTROY) != 0) 175 return (ENXIO); 176 /* XXX: Hack to allow read-only mounts. */ 177 #if 0 178 if ((sc->sc_flags & G_GATE_FLAG_READONLY) != 0 && dw > 0) 179 return (EPERM); 180 #endif 181 if ((sc->sc_flags & G_GATE_FLAG_WRITEONLY) != 0 && dr > 0) 182 return (EPERM); 183 return (0); 184 } 185 186 static void 187 g_gate_start(struct bio *bp) 188 { 189 struct g_gate_softc *sc; 190 191 sc = bp->bio_to->geom->softc; 192 if (sc == NULL || (sc->sc_flags & G_GATE_FLAG_DESTROY) != 0) { 193 g_io_deliver(bp, ENXIO); 194 return; 195 } 196 G_GATE_LOGREQ(2, bp, "Request received."); 197 switch (bp->bio_cmd) { 198 case BIO_READ: 199 break; 200 case BIO_DELETE: 201 case BIO_WRITE: 202 /* XXX: Hack to allow read-only mounts. */ 203 if ((sc->sc_flags & G_GATE_FLAG_READONLY) != 0) { 204 g_io_deliver(bp, EPERM); 205 return; 206 } 207 break; 208 case BIO_GETATTR: 209 default: 210 G_GATE_LOGREQ(2, bp, "Ignoring request."); 211 g_io_deliver(bp, EOPNOTSUPP); 212 return; 213 } 214 215 mtx_lock(&sc->sc_queue_mtx); 216 if (sc->sc_queue_count > sc->sc_queue_size) { 217 mtx_unlock(&sc->sc_queue_mtx); 218 G_GATE_LOGREQ(1, bp, "Queue full, request canceled."); 219 g_io_deliver(bp, EIO); 220 return; 221 } 222 223 bp->bio_driver1 = (void *)sc->sc_seq; 224 sc->sc_seq++; 225 sc->sc_queue_count++; 226 227 bioq_insert_tail(&sc->sc_inqueue, bp); 228 wakeup(sc); 229 230 mtx_unlock(&sc->sc_queue_mtx); 231 } 232 233 static struct g_gate_softc * 234 g_gate_find(u_int unit) 235 { 236 struct g_gate_softc *sc; 237 238 mtx_assert(&g_gate_list_mtx, MA_OWNED); 239 LIST_FOREACH(sc, &g_gate_list, sc_next) { 240 if (sc->sc_unit == unit) 241 break; 242 } 243 return (sc); 244 } 245 246 static struct g_gate_softc * 247 g_gate_hold(u_int unit) 248 { 249 struct g_gate_softc *sc; 250 251 mtx_lock(&g_gate_list_mtx); 252 sc = g_gate_find(unit); 253 if (sc != NULL) { 254 if ((sc->sc_flags & G_GATE_FLAG_DESTROY) != 0) 255 sc = NULL; 256 else 257 sc->sc_ref++; 258 } 259 mtx_unlock(&g_gate_list_mtx); 260 return (sc); 261 } 262 263 static void 264 g_gate_release(struct g_gate_softc *sc) 265 { 266 267 g_topology_assert_not(); 268 mtx_lock(&g_gate_list_mtx); 269 sc->sc_ref--; 270 KASSERT(sc->sc_ref >= 0, ("Negative sc_ref for %s.", sc->sc_name)); 271 if (sc->sc_ref == 0 && (sc->sc_flags & G_GATE_FLAG_DESTROY) != 0) { 272 mtx_unlock(&g_gate_list_mtx); 273 g_waitfor_event(g_gate_destroy_it, sc, M_WAITOK, NULL); 274 } else { 275 mtx_unlock(&g_gate_list_mtx); 276 } 277 } 278 279 static int 280 g_gate_getunit(int unit) 281 { 282 struct g_gate_softc *sc; 283 284 mtx_assert(&g_gate_list_mtx, MA_OWNED); 285 if (unit >= 0) { 286 LIST_FOREACH(sc, &g_gate_list, sc_next) { 287 if (sc->sc_unit == unit) 288 return (-1); 289 } 290 } else { 291 unit = 0; 292 once_again: 293 LIST_FOREACH(sc, &g_gate_list, sc_next) { 294 if (sc->sc_unit == unit) { 295 if (++unit > 666) 296 return (-1); 297 goto once_again; 298 } 299 } 300 } 301 return (unit); 302 } 303 304 static void 305 g_gate_guard(void *arg) 306 { 307 struct g_gate_softc *sc; 308 struct bintime curtime; 309 struct bio *bp, *bp2; 310 311 sc = arg; 312 binuptime(&curtime); 313 g_gate_hold(sc->sc_unit); 314 mtx_lock(&sc->sc_queue_mtx); 315 TAILQ_FOREACH_SAFE(bp, &sc->sc_inqueue.queue, bio_queue, bp2) { 316 if (curtime.sec - bp->bio_t0.sec < 5) 317 continue; 318 bioq_remove(&sc->sc_inqueue, bp); 319 sc->sc_queue_count--; 320 G_GATE_LOGREQ(1, bp, "Request timeout."); 321 g_io_deliver(bp, EIO); 322 } 323 TAILQ_FOREACH_SAFE(bp, &sc->sc_outqueue.queue, bio_queue, bp2) { 324 if (curtime.sec - bp->bio_t0.sec < 5) 325 continue; 326 bioq_remove(&sc->sc_outqueue, bp); 327 sc->sc_queue_count--; 328 G_GATE_LOGREQ(1, bp, "Request timeout."); 329 g_io_deliver(bp, EIO); 330 } 331 mtx_unlock(&sc->sc_queue_mtx); 332 if ((sc->sc_flags & G_GATE_FLAG_DESTROY) == 0) { 333 callout_reset(&sc->sc_callout, sc->sc_timeout * hz, 334 g_gate_guard, sc); 335 } 336 g_gate_release(sc); 337 } 338 339 static void 340 g_gate_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, 341 struct g_consumer *cp, struct g_provider *pp) 342 { 343 struct g_gate_softc *sc; 344 345 sc = gp->softc; 346 if (sc == NULL || pp != NULL || cp != NULL) 347 return; 348 g_gate_hold(sc->sc_unit); 349 if ((sc->sc_flags & G_GATE_FLAG_READONLY) != 0) { 350 sbuf_printf(sb, "%s<access>%s</access>\n", indent, "read-only"); 351 } else if ((sc->sc_flags & G_GATE_FLAG_WRITEONLY) != 0) { 352 sbuf_printf(sb, "%s<access>%s</access>\n", indent, 353 "write-only"); 354 } else { 355 sbuf_printf(sb, "%s<access>%s</access>\n", indent, 356 "read-write"); 357 } 358 sbuf_printf(sb, "%s<timeout>%u</timeout>\n", indent, sc->sc_timeout); 359 sbuf_printf(sb, "%s<info>%s</info>\n", indent, sc->sc_info); 360 sbuf_printf(sb, "%s<queue_count>%u</queue_count>\n", indent, 361 sc->sc_queue_count); 362 sbuf_printf(sb, "%s<queue_size>%u</queue_size>\n", indent, 363 sc->sc_queue_size); 364 sbuf_printf(sb, "%s<ref>%u</ref>\n", indent, sc->sc_ref); 365 g_topology_unlock(); 366 g_gate_release(sc); 367 g_topology_lock(); 368 } 369 370 static int 371 g_gate_create(struct g_gate_ctl_create *ggio) 372 { 373 struct g_gate_softc *sc; 374 struct g_geom *gp; 375 struct g_provider *pp; 376 377 if (ggio->gctl_mediasize == 0) { 378 G_GATE_DEBUG(1, "Invalid media size."); 379 return (EINVAL); 380 } 381 if (ggio->gctl_sectorsize > 0 && !powerof2(ggio->gctl_sectorsize)) { 382 G_GATE_DEBUG(1, "Invalid sector size."); 383 return (EINVAL); 384 } 385 if ((ggio->gctl_mediasize % ggio->gctl_sectorsize) != 0) { 386 G_GATE_DEBUG(1, "Invalid media size."); 387 return (EINVAL); 388 } 389 if ((ggio->gctl_flags & G_GATE_FLAG_READONLY) != 0 && 390 (ggio->gctl_flags & G_GATE_FLAG_WRITEONLY) != 0) { 391 G_GATE_DEBUG(1, "Invalid flags."); 392 return (EINVAL); 393 } 394 if (ggio->gctl_unit < -1) { 395 G_GATE_DEBUG(1, "Invalid unit number."); 396 return (EINVAL); 397 } 398 399 sc = malloc(sizeof(*sc), M_GATE, M_WAITOK | M_ZERO); 400 sc->sc_flags = (ggio->gctl_flags & G_GATE_USERFLAGS); 401 strlcpy(sc->sc_info, ggio->gctl_info, sizeof(sc->sc_info)); 402 sc->sc_seq = 0; 403 bioq_init(&sc->sc_inqueue); 404 bioq_init(&sc->sc_outqueue); 405 mtx_init(&sc->sc_queue_mtx, "gg:queue", NULL, MTX_DEF); 406 sc->sc_queue_count = 0; 407 sc->sc_queue_size = ggio->gctl_maxcount; 408 if (sc->sc_queue_size > G_GATE_MAX_QUEUE_SIZE) 409 sc->sc_queue_size = G_GATE_MAX_QUEUE_SIZE; 410 sc->sc_timeout = ggio->gctl_timeout; 411 callout_init(&sc->sc_callout, CALLOUT_MPSAFE); 412 mtx_lock(&g_gate_list_mtx); 413 ggio->gctl_unit = g_gate_getunit(ggio->gctl_unit); 414 if (ggio->gctl_unit == -1) { 415 mtx_unlock(&g_gate_list_mtx); 416 mtx_destroy(&sc->sc_queue_mtx); 417 free(sc, M_GATE); 418 return (EBUSY); 419 } 420 sc->sc_unit = ggio->gctl_unit; 421 LIST_INSERT_HEAD(&g_gate_list, sc, sc_next); 422 mtx_unlock(&g_gate_list_mtx); 423 424 g_topology_lock(); 425 gp = g_new_geomf(&g_gate_class, "%s%d", G_GATE_PROVIDER_NAME, 426 sc->sc_unit); 427 gp->start = g_gate_start; 428 gp->access = g_gate_access; 429 gp->dumpconf = g_gate_dumpconf; 430 gp->softc = sc; 431 pp = g_new_providerf(gp, "%s%d", G_GATE_PROVIDER_NAME, sc->sc_unit); 432 pp->mediasize = ggio->gctl_mediasize; 433 pp->sectorsize = ggio->gctl_sectorsize; 434 sc->sc_provider = pp; 435 g_error_provider(pp, 0); 436 g_topology_unlock(); 437 438 if (sc->sc_timeout > 0) { 439 callout_reset(&sc->sc_callout, sc->sc_timeout * hz, 440 g_gate_guard, sc); 441 } 442 return (0); 443 } 444 445 #define G_GATE_CHECK_VERSION(ggio) do { \ 446 if ((ggio)->gctl_version != G_GATE_VERSION) \ 447 return (EINVAL); \ 448 } while (0) 449 static int 450 g_gate_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flags, struct thread *td) 451 { 452 struct g_gate_softc *sc; 453 struct bio *bp; 454 int error = 0; 455 456 G_GATE_DEBUG(4, "ioctl(%s, %lx, %p, %x, %p)", devtoname(dev), cmd, addr, 457 flags, td); 458 459 switch (cmd) { 460 case G_GATE_CMD_CREATE: 461 { 462 struct g_gate_ctl_create *ggio = (void *)addr; 463 464 G_GATE_CHECK_VERSION(ggio); 465 error = g_gate_create(ggio); 466 return (error); 467 } 468 case G_GATE_CMD_DESTROY: 469 { 470 struct g_gate_ctl_destroy *ggio = (void *)addr; 471 472 G_GATE_CHECK_VERSION(ggio); 473 sc = g_gate_hold(ggio->gctl_unit); 474 if (sc == NULL) 475 return (ENXIO); 476 g_topology_lock(); 477 mtx_lock(&g_gate_list_mtx); 478 error = g_gate_destroy(sc, ggio->gctl_force); 479 if (error == 0) 480 g_gate_wither(sc); 481 g_topology_unlock(); 482 g_gate_release(sc); 483 return (error); 484 } 485 case G_GATE_CMD_START: 486 { 487 struct g_gate_ctl_io *ggio = (void *)addr; 488 489 G_GATE_CHECK_VERSION(ggio); 490 sc = g_gate_find(ggio->gctl_unit); 491 if (sc == NULL) 492 return (ENXIO); 493 for (;;) { 494 mtx_lock(&sc->sc_queue_mtx); 495 bp = bioq_first(&sc->sc_inqueue); 496 if (bp != NULL) 497 break; 498 if (msleep(sc, &sc->sc_queue_mtx, 499 PPAUSE | PDROP | PCATCH, "ggwait", 0) != 0) { 500 ggio->gctl_error = ECANCELED; 501 return (0); 502 } 503 if ((sc->sc_flags & G_GATE_FLAG_DESTROY) != 0) { 504 ggio->gctl_error = ECANCELED; 505 return (0); 506 } 507 } 508 ggio->gctl_cmd = bp->bio_cmd; 509 if ((bp->bio_cmd == BIO_DELETE || bp->bio_cmd == BIO_WRITE) && 510 bp->bio_length > ggio->gctl_length) { 511 mtx_unlock(&sc->sc_queue_mtx); 512 ggio->gctl_length = bp->bio_length; 513 ggio->gctl_error = ENOMEM; 514 return (0); 515 } 516 bioq_remove(&sc->sc_inqueue, bp); 517 bioq_insert_tail(&sc->sc_outqueue, bp); 518 mtx_unlock(&sc->sc_queue_mtx); 519 520 ggio->gctl_seq = (uintptr_t)bp->bio_driver1; 521 ggio->gctl_offset = bp->bio_offset; 522 ggio->gctl_length = bp->bio_length; 523 switch (bp->bio_cmd) { 524 case BIO_READ: 525 break; 526 case BIO_DELETE: 527 case BIO_WRITE: 528 error = copyout(bp->bio_data, ggio->gctl_data, 529 bp->bio_length); 530 if (error != 0) { 531 mtx_lock(&sc->sc_queue_mtx); 532 bioq_remove(&sc->sc_outqueue, bp); 533 bioq_insert_head(&sc->sc_inqueue, bp); 534 mtx_unlock(&sc->sc_queue_mtx); 535 return (error); 536 } 537 break; 538 } 539 return (0); 540 } 541 case G_GATE_CMD_DONE: 542 { 543 struct g_gate_ctl_io *ggio = (void *)addr; 544 545 G_GATE_CHECK_VERSION(ggio); 546 sc = g_gate_find(ggio->gctl_unit); 547 if (sc == NULL) 548 return (ENOENT); 549 mtx_lock(&sc->sc_queue_mtx); 550 TAILQ_FOREACH(bp, &sc->sc_outqueue.queue, bio_queue) { 551 if (ggio->gctl_seq == (uintptr_t)bp->bio_driver1) 552 break; 553 } 554 if (bp != NULL) { 555 bioq_remove(&sc->sc_outqueue, bp); 556 sc->sc_queue_count--; 557 } 558 mtx_unlock(&sc->sc_queue_mtx); 559 if (bp == NULL) { 560 /* 561 * Request was probably canceled. 562 */ 563 return (0); 564 } 565 if (ggio->gctl_error == EAGAIN) { 566 bp->bio_error = 0; 567 G_GATE_LOGREQ(1, bp, "Request desisted."); 568 mtx_lock(&sc->sc_queue_mtx); 569 sc->sc_queue_count++; 570 bioq_insert_head(&sc->sc_inqueue, bp); 571 wakeup(sc); 572 mtx_unlock(&sc->sc_queue_mtx); 573 } else { 574 bp->bio_error = ggio->gctl_error; 575 if (bp->bio_error == 0) { 576 bp->bio_completed = bp->bio_length; 577 switch (bp->bio_cmd) { 578 case BIO_READ: 579 error = copyin(ggio->gctl_data, 580 bp->bio_data, bp->bio_length); 581 if (error != 0) 582 bp->bio_error = error; 583 break; 584 case BIO_DELETE: 585 case BIO_WRITE: 586 break; 587 } 588 } 589 G_GATE_LOGREQ(2, bp, "Request done."); 590 g_io_deliver(bp, bp->bio_error); 591 } 592 return (error); 593 } 594 } 595 return (ENOIOCTL); 596 } 597 598 static void 599 g_gate_device(void) 600 { 601 602 status_dev = make_dev(&g_gate_cdevsw, 0x0, UID_ROOT, GID_WHEEL, 0600, 603 G_GATE_CTL_NAME); 604 } 605 606 static int 607 g_gate_modevent(module_t mod, int type, void *data) 608 { 609 int error = 0; 610 611 switch (type) { 612 case MOD_LOAD: 613 mtx_init(&g_gate_list_mtx, "gg_list_lock", NULL, MTX_DEF); 614 g_gate_device(); 615 break; 616 case MOD_UNLOAD: 617 mtx_lock(&g_gate_list_mtx); 618 if (!LIST_EMPTY(&g_gate_list)) { 619 mtx_unlock(&g_gate_list_mtx); 620 error = EBUSY; 621 break; 622 } 623 mtx_unlock(&g_gate_list_mtx); 624 mtx_destroy(&g_gate_list_mtx); 625 if (status_dev != 0) 626 destroy_dev(status_dev); 627 break; 628 default: 629 return (EOPNOTSUPP); 630 break; 631 } 632 633 return (error); 634 } 635 static moduledata_t g_gate_module = { 636 G_GATE_MOD_NAME, 637 g_gate_modevent, 638 NULL 639 }; 640 DECLARE_MODULE(geom_gate, g_gate_module, SI_SUB_DRIVERS, SI_ORDER_MIDDLE); 641 DECLARE_GEOM_CLASS(g_gate_class, g_gate); 642