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 "opt_geom.h" 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/kernel.h> 44 #include <sys/sysctl.h> 45 #include <sys/bio.h> 46 #include <sys/ctype.h> 47 #include <sys/fcntl.h> 48 #include <sys/malloc.h> 49 #include <sys/sbuf.h> 50 #include <sys/sysctl.h> 51 #include <sys/taskqueue.h> 52 #include <sys/devicestat.h> 53 #include <machine/md_var.h> 54 55 #include <sys/lock.h> 56 #include <sys/mutex.h> 57 #include <geom/geom.h> 58 #include <geom/geom_disk.h> 59 #include <geom/geom_int.h> 60 61 #include <dev/led/led.h> 62 63 struct g_disk_softc { 64 struct disk *dp; 65 struct sysctl_ctx_list sysctl_ctx; 66 struct sysctl_oid *sysctl_tree; 67 char led[64]; 68 uint32_t state; 69 struct task resize_task; 70 }; 71 72 static struct mtx g_disk_done_mtx; 73 74 static g_access_t g_disk_access; 75 static g_init_t g_disk_init; 76 static g_fini_t g_disk_fini; 77 static g_start_t g_disk_start; 78 static g_ioctl_t g_disk_ioctl; 79 static g_dumpconf_t g_disk_dumpconf; 80 static g_provgone_t g_disk_providergone; 81 82 static struct g_class g_disk_class = { 83 .name = "DISK", 84 .version = G_VERSION, 85 .init = g_disk_init, 86 .fini = g_disk_fini, 87 .start = g_disk_start, 88 .access = g_disk_access, 89 .ioctl = g_disk_ioctl, 90 .providergone = g_disk_providergone, 91 .dumpconf = g_disk_dumpconf, 92 }; 93 94 SYSCTL_DECL(_kern_geom); 95 static SYSCTL_NODE(_kern_geom, OID_AUTO, disk, CTLFLAG_RW, 0, 96 "GEOM_DISK stuff"); 97 98 static void 99 g_disk_init(struct g_class *mp __unused) 100 { 101 102 mtx_init(&g_disk_done_mtx, "g_disk_done", NULL, MTX_DEF); 103 } 104 105 static void 106 g_disk_fini(struct g_class *mp __unused) 107 { 108 109 mtx_destroy(&g_disk_done_mtx); 110 } 111 112 DECLARE_GEOM_CLASS(g_disk_class, g_disk); 113 114 static void __inline 115 g_disk_lock_giant(struct disk *dp) 116 { 117 118 if (dp->d_flags & DISKFLAG_NEEDSGIANT) 119 mtx_lock(&Giant); 120 } 121 122 static void __inline 123 g_disk_unlock_giant(struct disk *dp) 124 { 125 126 if (dp->d_flags & DISKFLAG_NEEDSGIANT) 127 mtx_unlock(&Giant); 128 } 129 130 static int 131 g_disk_access(struct g_provider *pp, int r, int w, int e) 132 { 133 struct disk *dp; 134 struct g_disk_softc *sc; 135 int error; 136 137 g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)", 138 pp->name, r, w, e); 139 g_topology_assert(); 140 sc = pp->geom->softc; 141 if (sc == NULL || (dp = sc->dp) == NULL || dp->d_destroyed) { 142 /* 143 * Allow decreasing access count even if disk is not 144 * avaliable anymore. 145 */ 146 if (r <= 0 && w <= 0 && e <= 0) 147 return (0); 148 return (ENXIO); 149 } 150 r += pp->acr; 151 w += pp->acw; 152 e += pp->ace; 153 error = 0; 154 if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) { 155 if (dp->d_open != NULL) { 156 g_disk_lock_giant(dp); 157 error = dp->d_open(dp); 158 if (bootverbose && error != 0) 159 printf("Opened disk %s -> %d\n", 160 pp->name, error); 161 g_disk_unlock_giant(dp); 162 } 163 pp->mediasize = dp->d_mediasize; 164 pp->sectorsize = dp->d_sectorsize; 165 if (dp->d_flags & DISKFLAG_CANDELETE) 166 pp->flags |= G_PF_CANDELETE; 167 else 168 pp->flags &= ~G_PF_CANDELETE; 169 pp->stripeoffset = dp->d_stripeoffset; 170 pp->stripesize = dp->d_stripesize; 171 dp->d_flags |= DISKFLAG_OPEN; 172 if (dp->d_maxsize == 0) { 173 printf("WARNING: Disk drive %s%d has no d_maxsize\n", 174 dp->d_name, dp->d_unit); 175 dp->d_maxsize = DFLTPHYS; 176 } 177 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) { 178 if (dp->d_close != NULL) { 179 g_disk_lock_giant(dp); 180 error = dp->d_close(dp); 181 if (error != 0) 182 printf("Closed disk %s -> %d\n", 183 pp->name, error); 184 g_disk_unlock_giant(dp); 185 } 186 sc->state = G_STATE_ACTIVE; 187 if (sc->led[0] != 0) 188 led_set(sc->led, "0"); 189 dp->d_flags &= ~DISKFLAG_OPEN; 190 } 191 return (error); 192 } 193 194 static void 195 g_disk_kerneldump(struct bio *bp, struct disk *dp) 196 { 197 struct g_kerneldump *gkd; 198 struct g_geom *gp; 199 200 gkd = (struct g_kerneldump*)bp->bio_data; 201 gp = bp->bio_to->geom; 202 g_trace(G_T_TOPOLOGY, "g_disk_kernedump(%s, %jd, %jd)", 203 gp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length); 204 if (dp->d_dump == NULL) { 205 g_io_deliver(bp, ENODEV); 206 return; 207 } 208 gkd->di.dumper = dp->d_dump; 209 gkd->di.priv = dp; 210 gkd->di.blocksize = dp->d_sectorsize; 211 gkd->di.maxiosize = dp->d_maxsize; 212 gkd->di.mediaoffset = gkd->offset; 213 if ((gkd->offset + gkd->length) > dp->d_mediasize) 214 gkd->length = dp->d_mediasize - gkd->offset; 215 gkd->di.mediasize = gkd->length; 216 g_io_deliver(bp, 0); 217 } 218 219 static void 220 g_disk_setstate(struct bio *bp, struct g_disk_softc *sc) 221 { 222 const char *cmd; 223 224 memcpy(&sc->state, bp->bio_data, sizeof(sc->state)); 225 if (sc->led[0] != 0) { 226 switch (sc->state) { 227 case G_STATE_FAILED: 228 cmd = "1"; 229 break; 230 case G_STATE_REBUILD: 231 cmd = "f5"; 232 break; 233 case G_STATE_RESYNC: 234 cmd = "f1"; 235 break; 236 default: 237 cmd = "0"; 238 break; 239 } 240 led_set(sc->led, cmd); 241 } 242 g_io_deliver(bp, 0); 243 } 244 245 static void 246 g_disk_done(struct bio *bp) 247 { 248 struct bio *bp2; 249 struct disk *dp; 250 struct g_disk_softc *sc; 251 252 /* See "notes" for why we need a mutex here */ 253 /* XXX: will witness accept a mix of Giant/unGiant drivers here ? */ 254 mtx_lock(&g_disk_done_mtx); 255 bp->bio_completed = bp->bio_length - bp->bio_resid; 256 257 bp2 = bp->bio_parent; 258 if (bp2->bio_error == 0) 259 bp2->bio_error = bp->bio_error; 260 bp2->bio_completed += bp->bio_completed; 261 if ((bp->bio_cmd & (BIO_READ|BIO_WRITE|BIO_DELETE)) != 0 && 262 (sc = bp2->bio_to->geom->softc) != NULL && 263 (dp = sc->dp) != NULL) { 264 devstat_end_transaction_bio(dp->d_devstat, bp); 265 } 266 g_destroy_bio(bp); 267 bp2->bio_inbed++; 268 if (bp2->bio_children == bp2->bio_inbed) { 269 bp2->bio_resid = bp2->bio_bcount - bp2->bio_completed; 270 g_io_deliver(bp2, bp2->bio_error); 271 } 272 mtx_unlock(&g_disk_done_mtx); 273 } 274 275 static int 276 g_disk_ioctl(struct g_provider *pp, u_long cmd, void * data, int fflag, struct thread *td) 277 { 278 struct g_geom *gp; 279 struct disk *dp; 280 struct g_disk_softc *sc; 281 int error; 282 283 gp = pp->geom; 284 sc = gp->softc; 285 dp = sc->dp; 286 287 if (dp->d_ioctl == NULL) 288 return (ENOIOCTL); 289 g_disk_lock_giant(dp); 290 error = dp->d_ioctl(dp, cmd, data, fflag, td); 291 g_disk_unlock_giant(dp); 292 return (error); 293 } 294 295 static void 296 g_disk_start(struct bio *bp) 297 { 298 struct bio *bp2, *bp3; 299 struct disk *dp; 300 struct g_disk_softc *sc; 301 int error; 302 off_t off; 303 304 sc = bp->bio_to->geom->softc; 305 if (sc == NULL || (dp = sc->dp) == NULL || dp->d_destroyed) { 306 g_io_deliver(bp, ENXIO); 307 return; 308 } 309 error = EJUSTRETURN; 310 switch(bp->bio_cmd) { 311 case BIO_DELETE: 312 if (!(dp->d_flags & DISKFLAG_CANDELETE)) { 313 error = EOPNOTSUPP; 314 break; 315 } 316 /* fall-through */ 317 case BIO_READ: 318 case BIO_WRITE: 319 off = 0; 320 bp3 = NULL; 321 bp2 = g_clone_bio(bp); 322 if (bp2 == NULL) { 323 error = ENOMEM; 324 break; 325 } 326 do { 327 bp2->bio_offset += off; 328 bp2->bio_length -= off; 329 bp2->bio_data += off; 330 if (bp2->bio_length > dp->d_maxsize) { 331 /* 332 * XXX: If we have a stripesize we should really 333 * use it here. 334 */ 335 bp2->bio_length = dp->d_maxsize; 336 off += dp->d_maxsize; 337 /* 338 * To avoid a race, we need to grab the next bio 339 * before we schedule this one. See "notes". 340 */ 341 bp3 = g_clone_bio(bp); 342 if (bp3 == NULL) 343 bp->bio_error = ENOMEM; 344 } 345 bp2->bio_done = g_disk_done; 346 bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize; 347 bp2->bio_bcount = bp2->bio_length; 348 bp2->bio_disk = dp; 349 devstat_start_transaction_bio(dp->d_devstat, bp2); 350 g_disk_lock_giant(dp); 351 dp->d_strategy(bp2); 352 g_disk_unlock_giant(dp); 353 bp2 = bp3; 354 bp3 = NULL; 355 } while (bp2 != NULL); 356 break; 357 case BIO_GETATTR: 358 /* Give the driver a chance to override */ 359 if (dp->d_getattr != NULL) { 360 if (bp->bio_disk == NULL) 361 bp->bio_disk = dp; 362 error = dp->d_getattr(bp); 363 if (error != -1) 364 break; 365 error = EJUSTRETURN; 366 } 367 if (g_handleattr_int(bp, "GEOM::candelete", 368 (dp->d_flags & DISKFLAG_CANDELETE) != 0)) 369 break; 370 else if (g_handleattr_int(bp, "GEOM::fwsectors", 371 dp->d_fwsectors)) 372 break; 373 else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads)) 374 break; 375 else if (g_handleattr_off_t(bp, "GEOM::frontstuff", 0)) 376 break; 377 else if (g_handleattr_str(bp, "GEOM::ident", dp->d_ident)) 378 break; 379 else if (g_handleattr(bp, "GEOM::hba_vendor", 380 &dp->d_hba_vendor, 2)) 381 break; 382 else if (g_handleattr(bp, "GEOM::hba_device", 383 &dp->d_hba_device, 2)) 384 break; 385 else if (g_handleattr(bp, "GEOM::hba_subvendor", 386 &dp->d_hba_subvendor, 2)) 387 break; 388 else if (g_handleattr(bp, "GEOM::hba_subdevice", 389 &dp->d_hba_subdevice, 2)) 390 break; 391 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump")) 392 g_disk_kerneldump(bp, dp); 393 else if (!strcmp(bp->bio_attribute, "GEOM::setstate")) 394 g_disk_setstate(bp, sc); 395 else 396 error = ENOIOCTL; 397 break; 398 case BIO_FLUSH: 399 g_trace(G_T_TOPOLOGY, "g_disk_flushcache(%s)", 400 bp->bio_to->name); 401 if (!(dp->d_flags & DISKFLAG_CANFLUSHCACHE)) { 402 error = EOPNOTSUPP; 403 break; 404 } 405 bp2 = g_clone_bio(bp); 406 if (bp2 == NULL) { 407 g_io_deliver(bp, ENOMEM); 408 return; 409 } 410 bp2->bio_done = g_disk_done; 411 bp2->bio_disk = dp; 412 g_disk_lock_giant(dp); 413 dp->d_strategy(bp2); 414 g_disk_unlock_giant(dp); 415 break; 416 default: 417 error = EOPNOTSUPP; 418 break; 419 } 420 if (error != EJUSTRETURN) 421 g_io_deliver(bp, error); 422 return; 423 } 424 425 static void 426 g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp) 427 { 428 struct disk *dp; 429 struct g_disk_softc *sc; 430 431 sc = gp->softc; 432 if (sc == NULL || (dp = sc->dp) == NULL) 433 return; 434 if (indent == NULL) { 435 sbuf_printf(sb, " hd %u", dp->d_fwheads); 436 sbuf_printf(sb, " sc %u", dp->d_fwsectors); 437 return; 438 } 439 if (pp != NULL) { 440 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n", 441 indent, dp->d_fwheads); 442 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n", 443 indent, dp->d_fwsectors); 444 sbuf_printf(sb, "%s<ident>%s</ident>\n", indent, dp->d_ident); 445 sbuf_printf(sb, "%s<descr>%s</descr>\n", indent, dp->d_descr); 446 } 447 } 448 449 static void 450 g_disk_resize_task(void *context, int pending) 451 { 452 struct g_geom *gp; 453 struct g_provider *pp; 454 struct disk *dp; 455 struct g_disk_softc *sc; 456 457 sc = (struct g_disk_softc *)context; 458 dp = sc->dp; 459 gp = dp->d_geom; 460 461 LIST_FOREACH(pp, &gp->provider, provider) { 462 if (pp->sectorsize != 0 && 463 pp->sectorsize != dp->d_sectorsize) 464 g_wither_provider(pp, ENXIO); 465 else 466 g_resize_provider(pp, dp->d_mediasize); 467 } 468 } 469 470 static void 471 g_disk_create(void *arg, int flag) 472 { 473 struct g_geom *gp; 474 struct g_provider *pp; 475 struct disk *dp; 476 struct g_disk_softc *sc; 477 char tmpstr[80]; 478 479 if (flag == EV_CANCEL) 480 return; 481 g_topology_assert(); 482 dp = arg; 483 sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO); 484 sc->dp = dp; 485 gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit); 486 gp->softc = sc; 487 pp = g_new_providerf(gp, "%s", gp->name); 488 pp->mediasize = dp->d_mediasize; 489 pp->sectorsize = dp->d_sectorsize; 490 if (dp->d_flags & DISKFLAG_CANDELETE) 491 pp->flags |= G_PF_CANDELETE; 492 pp->stripeoffset = dp->d_stripeoffset; 493 pp->stripesize = dp->d_stripesize; 494 if (bootverbose) 495 printf("GEOM: new disk %s\n", gp->name); 496 sysctl_ctx_init(&sc->sysctl_ctx); 497 snprintf(tmpstr, sizeof(tmpstr), "GEOM disk %s", gp->name); 498 sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx, 499 SYSCTL_STATIC_CHILDREN(_kern_geom_disk), OID_AUTO, gp->name, 500 CTLFLAG_RD, 0, tmpstr); 501 if (sc->sysctl_tree != NULL) { 502 snprintf(tmpstr, sizeof(tmpstr), 503 "kern.geom.disk.%s.led", gp->name); 504 TUNABLE_STR_FETCH(tmpstr, sc->led, sizeof(sc->led)); 505 SYSCTL_ADD_STRING(&sc->sysctl_ctx, 506 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "led", 507 CTLFLAG_RW | CTLFLAG_TUN, sc->led, sizeof(sc->led), 508 "LED name"); 509 } 510 TASK_INIT(&sc->resize_task, 0, g_disk_resize_task, sc); 511 pp->private = sc; 512 dp->d_geom = gp; 513 g_error_provider(pp, 0); 514 } 515 516 /* 517 * We get this callback after all of the consumers have gone away, and just 518 * before the provider is freed. If the disk driver provided a d_gone 519 * callback, let them know that it is okay to free resources -- they won't 520 * be getting any more accesses from GEOM. 521 */ 522 static void 523 g_disk_providergone(struct g_provider *pp) 524 { 525 struct disk *dp; 526 struct g_disk_softc *sc; 527 528 sc = (struct g_disk_softc *)pp->geom->softc; 529 530 /* 531 * If the softc is already NULL, then we've probably been through 532 * g_disk_destroy already; there is nothing for us to do anyway. 533 */ 534 if (sc == NULL) 535 return; 536 537 dp = sc->dp; 538 539 if (dp->d_gone != NULL) 540 dp->d_gone(dp); 541 } 542 543 static void 544 g_disk_destroy(void *ptr, int flag) 545 { 546 struct disk *dp; 547 struct g_geom *gp; 548 struct g_disk_softc *sc; 549 550 g_topology_assert(); 551 dp = ptr; 552 gp = dp->d_geom; 553 if (gp != NULL) { 554 sc = gp->softc; 555 if (sc->sysctl_tree != NULL) { 556 sysctl_ctx_free(&sc->sysctl_ctx); 557 sc->sysctl_tree = NULL; 558 } 559 if (sc->led[0] != 0) { 560 led_set(sc->led, "0"); 561 sc->led[0] = 0; 562 } 563 g_free(sc); 564 gp->softc = NULL; 565 g_wither_geom(gp, ENXIO); 566 } 567 g_free(dp); 568 } 569 570 /* 571 * We only allow printable characters in disk ident, 572 * the rest is converted to 'x<HH>'. 573 */ 574 static void 575 g_disk_ident_adjust(char *ident, size_t size) 576 { 577 char *p, tmp[4], newid[DISK_IDENT_SIZE]; 578 579 newid[0] = '\0'; 580 for (p = ident; *p != '\0'; p++) { 581 if (isprint(*p)) { 582 tmp[0] = *p; 583 tmp[1] = '\0'; 584 } else { 585 snprintf(tmp, sizeof(tmp), "x%02hhx", 586 *(unsigned char *)p); 587 } 588 if (strlcat(newid, tmp, sizeof(newid)) >= sizeof(newid)) 589 break; 590 } 591 bzero(ident, size); 592 strlcpy(ident, newid, size); 593 } 594 595 struct disk * 596 disk_alloc(void) 597 { 598 599 return (g_malloc(sizeof(struct disk), M_WAITOK | M_ZERO)); 600 } 601 602 void 603 disk_create(struct disk *dp, int version) 604 { 605 606 if (version != DISK_VERSION_02) { 607 printf("WARNING: Attempt to add disk %s%d %s", 608 dp->d_name, dp->d_unit, 609 " using incompatible ABI version of disk(9)\n"); 610 printf("WARNING: Ignoring disk %s%d\n", 611 dp->d_name, dp->d_unit); 612 return; 613 } 614 KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy")); 615 KASSERT(dp->d_name != NULL, ("disk_create need d_name")); 616 KASSERT(*dp->d_name != 0, ("disk_create need d_name")); 617 KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long")); 618 if (dp->d_devstat == NULL) 619 dp->d_devstat = devstat_new_entry(dp->d_name, dp->d_unit, 620 dp->d_sectorsize, DEVSTAT_ALL_SUPPORTED, 621 DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX); 622 dp->d_geom = NULL; 623 g_disk_ident_adjust(dp->d_ident, sizeof(dp->d_ident)); 624 g_post_event(g_disk_create, dp, M_WAITOK, dp, NULL); 625 } 626 627 void 628 disk_destroy(struct disk *dp) 629 { 630 631 g_cancel_event(dp); 632 dp->d_destroyed = 1; 633 if (dp->d_devstat != NULL) 634 devstat_remove_entry(dp->d_devstat); 635 g_post_event(g_disk_destroy, dp, M_WAITOK, NULL); 636 } 637 638 void 639 disk_gone(struct disk *dp) 640 { 641 struct g_geom *gp; 642 struct g_provider *pp; 643 644 gp = dp->d_geom; 645 if (gp != NULL) 646 LIST_FOREACH(pp, &gp->provider, provider) 647 g_wither_provider(pp, ENXIO); 648 } 649 650 void 651 disk_attr_changed(struct disk *dp, const char *attr, int flag) 652 { 653 struct g_geom *gp; 654 struct g_provider *pp; 655 656 gp = dp->d_geom; 657 if (gp != NULL) 658 LIST_FOREACH(pp, &gp->provider, provider) 659 (void)g_attr_changed(pp, attr, flag); 660 } 661 662 void 663 disk_media_changed(struct disk *dp, int flag) 664 { 665 struct g_geom *gp; 666 struct g_provider *pp; 667 668 gp = dp->d_geom; 669 if (gp != NULL) { 670 LIST_FOREACH(pp, &gp->provider, provider) 671 g_media_changed(pp, flag); 672 } 673 } 674 675 void 676 disk_media_gone(struct disk *dp, int flag) 677 { 678 struct g_geom *gp; 679 struct g_provider *pp; 680 681 gp = dp->d_geom; 682 if (gp != NULL) { 683 LIST_FOREACH(pp, &gp->provider, provider) 684 g_media_gone(pp, flag); 685 } 686 } 687 688 void 689 disk_resize(struct disk *dp) 690 { 691 struct g_geom *gp; 692 struct g_disk_softc *sc; 693 int error; 694 695 gp = dp->d_geom; 696 697 if (gp == NULL) 698 return; 699 700 sc = gp->softc; 701 702 error = taskqueue_enqueue(taskqueue_thread, &sc->resize_task); 703 KASSERT(error == 0, ("taskqueue_enqueue(9) failed.")); 704 } 705 706 static void 707 g_kern_disks(void *p, int flag __unused) 708 { 709 struct sbuf *sb; 710 struct g_geom *gp; 711 char *sp; 712 713 sb = p; 714 sp = ""; 715 g_topology_assert(); 716 LIST_FOREACH(gp, &g_disk_class.geom, geom) { 717 sbuf_printf(sb, "%s%s", sp, gp->name); 718 sp = " "; 719 } 720 sbuf_finish(sb); 721 } 722 723 static int 724 sysctl_disks(SYSCTL_HANDLER_ARGS) 725 { 726 int error; 727 struct sbuf *sb; 728 729 sb = sbuf_new_auto(); 730 g_waitfor_event(g_kern_disks, sb, M_WAITOK, NULL); 731 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1); 732 sbuf_delete(sb); 733 return error; 734 } 735 736 SYSCTL_PROC(_kern, OID_AUTO, disks, 737 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 738 sysctl_disks, "A", "names of available disks"); 739