geom_disk.c revision 252657
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: head/sys/geom/geom_disk.c 252657 2013-07-03 23:46:30Z smh $"); 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/devicestat.h> 52#include <machine/md_var.h> 53 54#include <sys/lock.h> 55#include <sys/mutex.h> 56#include <geom/geom.h> 57#include <geom/geom_disk.h> 58#include <geom/geom_int.h> 59 60#include <dev/led/led.h> 61 62struct g_disk_softc { 63 struct mtx done_mtx; 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}; 70 71static g_access_t g_disk_access; 72static g_start_t g_disk_start; 73static g_ioctl_t g_disk_ioctl; 74static g_dumpconf_t g_disk_dumpconf; 75static g_provgone_t g_disk_providergone; 76 77static struct g_class g_disk_class = { 78 .name = G_DISK_CLASS_NAME, 79 .version = G_VERSION, 80 .start = g_disk_start, 81 .access = g_disk_access, 82 .ioctl = g_disk_ioctl, 83 .providergone = g_disk_providergone, 84 .dumpconf = g_disk_dumpconf, 85}; 86 87SYSCTL_DECL(_kern_geom); 88static SYSCTL_NODE(_kern_geom, OID_AUTO, disk, CTLFLAG_RW, 0, 89 "GEOM_DISK stuff"); 90 91DECLARE_GEOM_CLASS(g_disk_class, g_disk); 92 93static void __inline 94g_disk_lock_giant(struct disk *dp) 95{ 96 97 if (dp->d_flags & DISKFLAG_NEEDSGIANT) 98 mtx_lock(&Giant); 99} 100 101static void __inline 102g_disk_unlock_giant(struct disk *dp) 103{ 104 105 if (dp->d_flags & DISKFLAG_NEEDSGIANT) 106 mtx_unlock(&Giant); 107} 108 109static int 110g_disk_access(struct g_provider *pp, int r, int w, int e) 111{ 112 struct disk *dp; 113 struct g_disk_softc *sc; 114 int error; 115 116 g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)", 117 pp->name, r, w, e); 118 g_topology_assert(); 119 sc = pp->private; 120 if (sc == NULL || (dp = sc->dp) == NULL || dp->d_destroyed) { 121 /* 122 * Allow decreasing access count even if disk is not 123 * avaliable anymore. 124 */ 125 if (r <= 0 && w <= 0 && e <= 0) 126 return (0); 127 return (ENXIO); 128 } 129 r += pp->acr; 130 w += pp->acw; 131 e += pp->ace; 132 error = 0; 133 if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) { 134 if (dp->d_open != NULL) { 135 g_disk_lock_giant(dp); 136 error = dp->d_open(dp); 137 if (bootverbose && error != 0) 138 printf("Opened disk %s -> %d\n", 139 pp->name, error); 140 g_disk_unlock_giant(dp); 141 if (error != 0) 142 return (error); 143 } 144 pp->mediasize = dp->d_mediasize; 145 pp->sectorsize = dp->d_sectorsize; 146 if (dp->d_maxsize == 0) { 147 printf("WARNING: Disk drive %s%d has no d_maxsize\n", 148 dp->d_name, dp->d_unit); 149 dp->d_maxsize = DFLTPHYS; 150 } 151 if (dp->d_delmaxsize == 0) { 152 if (bootverbose && dp->d_flags & DISKFLAG_CANDELETE) { 153 printf("WARNING: Disk drive %s%d has no " 154 "d_delmaxsize\n", dp->d_name, dp->d_unit); 155 } 156 dp->d_delmaxsize = dp->d_maxsize; 157 } 158 pp->stripeoffset = dp->d_stripeoffset; 159 pp->stripesize = dp->d_stripesize; 160 dp->d_flags |= DISKFLAG_OPEN; 161 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) { 162 if (dp->d_close != NULL) { 163 g_disk_lock_giant(dp); 164 error = dp->d_close(dp); 165 if (error != 0) 166 printf("Closed disk %s -> %d\n", 167 pp->name, error); 168 g_disk_unlock_giant(dp); 169 } 170 sc->state = G_STATE_ACTIVE; 171 if (sc->led[0] != 0) 172 led_set(sc->led, "0"); 173 dp->d_flags &= ~DISKFLAG_OPEN; 174 } 175 return (error); 176} 177 178static void 179g_disk_kerneldump(struct bio *bp, struct disk *dp) 180{ 181 struct g_kerneldump *gkd; 182 struct g_geom *gp; 183 184 gkd = (struct g_kerneldump*)bp->bio_data; 185 gp = bp->bio_to->geom; 186 g_trace(G_T_TOPOLOGY, "g_disk_kernedump(%s, %jd, %jd)", 187 gp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length); 188 if (dp->d_dump == NULL) { 189 g_io_deliver(bp, ENODEV); 190 return; 191 } 192 gkd->di.dumper = dp->d_dump; 193 gkd->di.priv = dp; 194 gkd->di.blocksize = dp->d_sectorsize; 195 gkd->di.maxiosize = dp->d_maxsize; 196 gkd->di.mediaoffset = gkd->offset; 197 if ((gkd->offset + gkd->length) > dp->d_mediasize) 198 gkd->length = dp->d_mediasize - gkd->offset; 199 gkd->di.mediasize = gkd->length; 200 g_io_deliver(bp, 0); 201} 202 203static void 204g_disk_setstate(struct bio *bp, struct g_disk_softc *sc) 205{ 206 const char *cmd; 207 208 memcpy(&sc->state, bp->bio_data, sizeof(sc->state)); 209 if (sc->led[0] != 0) { 210 switch (sc->state) { 211 case G_STATE_FAILED: 212 cmd = "1"; 213 break; 214 case G_STATE_REBUILD: 215 cmd = "f5"; 216 break; 217 case G_STATE_RESYNC: 218 cmd = "f1"; 219 break; 220 default: 221 cmd = "0"; 222 break; 223 } 224 led_set(sc->led, cmd); 225 } 226 g_io_deliver(bp, 0); 227} 228 229static void 230g_disk_done(struct bio *bp) 231{ 232 struct bio *bp2; 233 struct g_disk_softc *sc; 234 235 /* See "notes" for why we need a mutex here */ 236 /* XXX: will witness accept a mix of Giant/unGiant drivers here ? */ 237 bp2 = bp->bio_parent; 238 sc = bp2->bio_to->private; 239 bp->bio_completed = bp->bio_length - bp->bio_resid; 240 mtx_lock(&sc->done_mtx); 241 if (bp2->bio_error == 0) 242 bp2->bio_error = bp->bio_error; 243 bp2->bio_completed += bp->bio_completed; 244 if ((bp->bio_cmd & (BIO_READ|BIO_WRITE|BIO_DELETE)) != 0) 245 devstat_end_transaction_bio(sc->dp->d_devstat, bp); 246 g_destroy_bio(bp); 247 bp2->bio_inbed++; 248 if (bp2->bio_children == bp2->bio_inbed) { 249 bp2->bio_resid = bp2->bio_bcount - bp2->bio_completed; 250 g_io_deliver(bp2, bp2->bio_error); 251 } 252 mtx_unlock(&sc->done_mtx); 253} 254 255static int 256g_disk_ioctl(struct g_provider *pp, u_long cmd, void * data, int fflag, struct thread *td) 257{ 258 struct disk *dp; 259 struct g_disk_softc *sc; 260 int error; 261 262 sc = pp->private; 263 dp = sc->dp; 264 265 if (dp->d_ioctl == NULL) 266 return (ENOIOCTL); 267 g_disk_lock_giant(dp); 268 error = dp->d_ioctl(dp, cmd, data, fflag, td); 269 g_disk_unlock_giant(dp); 270 return (error); 271} 272 273static void 274g_disk_start(struct bio *bp) 275{ 276 struct bio *bp2, *bp3; 277 struct disk *dp; 278 struct g_disk_softc *sc; 279 int error; 280 off_t off; 281 282 sc = bp->bio_to->private; 283 if (sc == NULL || (dp = sc->dp) == NULL || dp->d_destroyed) { 284 g_io_deliver(bp, ENXIO); 285 return; 286 } 287 error = EJUSTRETURN; 288 switch(bp->bio_cmd) { 289 case BIO_DELETE: 290 if (!(dp->d_flags & DISKFLAG_CANDELETE)) { 291 error = EOPNOTSUPP; 292 break; 293 } 294 /* fall-through */ 295 case BIO_READ: 296 case BIO_WRITE: 297 off = 0; 298 bp3 = NULL; 299 bp2 = g_clone_bio(bp); 300 if (bp2 == NULL) { 301 error = ENOMEM; 302 break; 303 } 304 do { 305 off_t d_maxsize; 306 307 d_maxsize = (bp->bio_cmd == BIO_DELETE) ? 308 dp->d_delmaxsize : dp->d_maxsize; 309 bp2->bio_offset += off; 310 bp2->bio_length -= off; 311 if ((bp->bio_flags & BIO_UNMAPPED) == 0) { 312 bp2->bio_data += off; 313 } else { 314 KASSERT((dp->d_flags & DISKFLAG_UNMAPPED_BIO) 315 != 0, 316 ("unmapped bio not supported by disk %s", 317 dp->d_name)); 318 bp2->bio_ma += off / PAGE_SIZE; 319 bp2->bio_ma_offset += off; 320 bp2->bio_ma_offset %= PAGE_SIZE; 321 bp2->bio_ma_n -= off / PAGE_SIZE; 322 } 323 if (bp2->bio_length > d_maxsize) { 324 /* 325 * XXX: If we have a stripesize we should really 326 * use it here. Care should be taken in the delete 327 * case if this is done as deletes can be very 328 * sensitive to size given how they are processed. 329 */ 330 bp2->bio_length = d_maxsize; 331 if ((bp->bio_flags & BIO_UNMAPPED) != 0) { 332 bp2->bio_ma_n = howmany( 333 bp2->bio_ma_offset + 334 bp2->bio_length, PAGE_SIZE); 335 } 336 off += 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_BIO, "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 425static void 426g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp) 427{ 428 struct bio *bp; 429 struct disk *dp; 430 struct g_disk_softc *sc; 431 char *buf; 432 int res = 0; 433 434 sc = gp->softc; 435 if (sc == NULL || (dp = sc->dp) == NULL) 436 return; 437 if (indent == NULL) { 438 sbuf_printf(sb, " hd %u", dp->d_fwheads); 439 sbuf_printf(sb, " sc %u", dp->d_fwsectors); 440 return; 441 } 442 if (pp != NULL) { 443 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n", 444 indent, dp->d_fwheads); 445 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n", 446 indent, dp->d_fwsectors); 447 if (dp->d_getattr != NULL) { 448 buf = g_malloc(DISK_IDENT_SIZE, M_WAITOK); 449 bp = g_alloc_bio(); 450 bp->bio_disk = dp; 451 bp->bio_attribute = "GEOM::ident"; 452 bp->bio_length = DISK_IDENT_SIZE; 453 bp->bio_data = buf; 454 res = dp->d_getattr(bp); 455 sbuf_printf(sb, "%s<ident>%s</ident>\n", indent, 456 res == 0 ? buf: dp->d_ident); 457 bp->bio_attribute = "GEOM::lunid"; 458 bp->bio_length = DISK_IDENT_SIZE; 459 bp->bio_data = buf; 460 if (dp->d_getattr(bp) == 0) 461 sbuf_printf(sb, "%s<lunid>%s</lunid>\n", 462 indent, buf); 463 g_destroy_bio(bp); 464 g_free(buf); 465 } else 466 sbuf_printf(sb, "%s<ident>%s</ident>\n", indent, 467 dp->d_ident); 468 sbuf_printf(sb, "%s<descr>%s</descr>\n", indent, dp->d_descr); 469 } 470} 471 472static void 473g_disk_resize(void *ptr, int flag) 474{ 475 struct disk *dp; 476 struct g_geom *gp; 477 struct g_provider *pp; 478 479 if (flag == EV_CANCEL) 480 return; 481 g_topology_assert(); 482 483 dp = ptr; 484 gp = dp->d_geom; 485 486 if (dp->d_destroyed || gp == NULL) 487 return; 488 489 LIST_FOREACH(pp, &gp->provider, provider) { 490 if (pp->sectorsize != 0 && 491 pp->sectorsize != dp->d_sectorsize) 492 g_wither_provider(pp, ENXIO); 493 else 494 g_resize_provider(pp, dp->d_mediasize); 495 } 496} 497 498static void 499g_disk_create(void *arg, int flag) 500{ 501 struct g_geom *gp; 502 struct g_provider *pp; 503 struct disk *dp; 504 struct g_disk_softc *sc; 505 char tmpstr[80]; 506 507 if (flag == EV_CANCEL) 508 return; 509 g_topology_assert(); 510 dp = arg; 511 sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO); 512 mtx_init(&sc->done_mtx, "g_disk_done", NULL, MTX_DEF); 513 sc->dp = dp; 514 gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit); 515 gp->softc = sc; 516 pp = g_new_providerf(gp, "%s", gp->name); 517 pp->mediasize = dp->d_mediasize; 518 pp->sectorsize = dp->d_sectorsize; 519 pp->stripeoffset = dp->d_stripeoffset; 520 pp->stripesize = dp->d_stripesize; 521 if ((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0) 522 pp->flags |= G_PF_ACCEPT_UNMAPPED; 523 if (bootverbose) 524 printf("GEOM: new disk %s\n", gp->name); 525 sysctl_ctx_init(&sc->sysctl_ctx); 526 snprintf(tmpstr, sizeof(tmpstr), "GEOM disk %s", gp->name); 527 sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx, 528 SYSCTL_STATIC_CHILDREN(_kern_geom_disk), OID_AUTO, gp->name, 529 CTLFLAG_RD, 0, tmpstr); 530 if (sc->sysctl_tree != NULL) { 531 snprintf(tmpstr, sizeof(tmpstr), 532 "kern.geom.disk.%s.led", gp->name); 533 TUNABLE_STR_FETCH(tmpstr, sc->led, sizeof(sc->led)); 534 SYSCTL_ADD_STRING(&sc->sysctl_ctx, 535 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "led", 536 CTLFLAG_RW | CTLFLAG_TUN, sc->led, sizeof(sc->led), 537 "LED name"); 538 } 539 pp->private = sc; 540 dp->d_geom = gp; 541 g_error_provider(pp, 0); 542} 543 544/* 545 * We get this callback after all of the consumers have gone away, and just 546 * before the provider is freed. If the disk driver provided a d_gone 547 * callback, let them know that it is okay to free resources -- they won't 548 * be getting any more accesses from GEOM. 549 */ 550static void 551g_disk_providergone(struct g_provider *pp) 552{ 553 struct disk *dp; 554 struct g_disk_softc *sc; 555 556 sc = (struct g_disk_softc *)pp->private; 557 dp = sc->dp; 558 if (dp != NULL && dp->d_gone != NULL) 559 dp->d_gone(dp); 560 if (sc->sysctl_tree != NULL) { 561 sysctl_ctx_free(&sc->sysctl_ctx); 562 sc->sysctl_tree = NULL; 563 } 564 if (sc->led[0] != 0) { 565 led_set(sc->led, "0"); 566 sc->led[0] = 0; 567 } 568 pp->private = NULL; 569 pp->geom->softc = NULL; 570 mtx_destroy(&sc->done_mtx); 571 g_free(sc); 572} 573 574static void 575g_disk_destroy(void *ptr, int flag) 576{ 577 struct disk *dp; 578 struct g_geom *gp; 579 struct g_disk_softc *sc; 580 581 g_topology_assert(); 582 dp = ptr; 583 gp = dp->d_geom; 584 if (gp != NULL) { 585 sc = gp->softc; 586 if (sc != NULL) 587 sc->dp = NULL; 588 dp->d_geom = NULL; 589 g_wither_geom(gp, ENXIO); 590 } 591 g_free(dp); 592} 593 594/* 595 * We only allow printable characters in disk ident, 596 * the rest is converted to 'x<HH>'. 597 */ 598static void 599g_disk_ident_adjust(char *ident, size_t size) 600{ 601 char *p, tmp[4], newid[DISK_IDENT_SIZE]; 602 603 newid[0] = '\0'; 604 for (p = ident; *p != '\0'; p++) { 605 if (isprint(*p)) { 606 tmp[0] = *p; 607 tmp[1] = '\0'; 608 } else { 609 snprintf(tmp, sizeof(tmp), "x%02hhx", 610 *(unsigned char *)p); 611 } 612 if (strlcat(newid, tmp, sizeof(newid)) >= sizeof(newid)) 613 break; 614 } 615 bzero(ident, size); 616 strlcpy(ident, newid, size); 617} 618 619struct disk * 620disk_alloc(void) 621{ 622 623 return (g_malloc(sizeof(struct disk), M_WAITOK | M_ZERO)); 624} 625 626void 627disk_create(struct disk *dp, int version) 628{ 629 630 if (version != DISK_VERSION) { 631 printf("WARNING: Attempt to add disk %s%d %s", 632 dp->d_name, dp->d_unit, 633 " using incompatible ABI version of disk(9)\n"); 634 printf("WARNING: Ignoring disk %s%d\n", 635 dp->d_name, dp->d_unit); 636 return; 637 } 638 KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy")); 639 KASSERT(dp->d_name != NULL, ("disk_create need d_name")); 640 KASSERT(*dp->d_name != 0, ("disk_create need d_name")); 641 KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long")); 642 if (dp->d_devstat == NULL) 643 dp->d_devstat = devstat_new_entry(dp->d_name, dp->d_unit, 644 dp->d_sectorsize, DEVSTAT_ALL_SUPPORTED, 645 DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX); 646 dp->d_geom = NULL; 647 g_disk_ident_adjust(dp->d_ident, sizeof(dp->d_ident)); 648 g_post_event(g_disk_create, dp, M_WAITOK, dp, NULL); 649} 650 651void 652disk_destroy(struct disk *dp) 653{ 654 655 g_cancel_event(dp); 656 dp->d_destroyed = 1; 657 if (dp->d_devstat != NULL) 658 devstat_remove_entry(dp->d_devstat); 659 g_post_event(g_disk_destroy, dp, M_WAITOK, NULL); 660} 661 662void 663disk_gone(struct disk *dp) 664{ 665 struct g_geom *gp; 666 struct g_provider *pp; 667 668 gp = dp->d_geom; 669 if (gp != NULL) { 670 pp = LIST_FIRST(&gp->provider); 671 if (pp != NULL) { 672 KASSERT(LIST_NEXT(pp, provider) == NULL, 673 ("geom %p has more than one provider", gp)); 674 g_wither_provider(pp, ENXIO); 675 } 676 } 677} 678 679void 680disk_attr_changed(struct disk *dp, const char *attr, int flag) 681{ 682 struct g_geom *gp; 683 struct g_provider *pp; 684 685 gp = dp->d_geom; 686 if (gp != NULL) 687 LIST_FOREACH(pp, &gp->provider, provider) 688 (void)g_attr_changed(pp, attr, flag); 689} 690 691void 692disk_media_changed(struct disk *dp, int flag) 693{ 694 struct g_geom *gp; 695 struct g_provider *pp; 696 697 gp = dp->d_geom; 698 if (gp != NULL) { 699 pp = LIST_FIRST(&gp->provider); 700 if (pp != NULL) { 701 KASSERT(LIST_NEXT(pp, provider) == NULL, 702 ("geom %p has more than one provider", gp)); 703 g_media_changed(pp, flag); 704 } 705 } 706} 707 708void 709disk_media_gone(struct disk *dp, int flag) 710{ 711 struct g_geom *gp; 712 struct g_provider *pp; 713 714 gp = dp->d_geom; 715 if (gp != NULL) { 716 pp = LIST_FIRST(&gp->provider); 717 if (pp != NULL) { 718 KASSERT(LIST_NEXT(pp, provider) == NULL, 719 ("geom %p has more than one provider", gp)); 720 g_media_gone(pp, flag); 721 } 722 } 723} 724 725int 726disk_resize(struct disk *dp, int flag) 727{ 728 729 if (dp->d_destroyed || dp->d_geom == NULL) 730 return (0); 731 732 return (g_post_event(g_disk_resize, dp, flag, NULL)); 733} 734 735static void 736g_kern_disks(void *p, int flag __unused) 737{ 738 struct sbuf *sb; 739 struct g_geom *gp; 740 char *sp; 741 742 sb = p; 743 sp = ""; 744 g_topology_assert(); 745 LIST_FOREACH(gp, &g_disk_class.geom, geom) { 746 sbuf_printf(sb, "%s%s", sp, gp->name); 747 sp = " "; 748 } 749 sbuf_finish(sb); 750} 751 752static int 753sysctl_disks(SYSCTL_HANDLER_ARGS) 754{ 755 int error; 756 struct sbuf *sb; 757 758 sb = sbuf_new_auto(); 759 g_waitfor_event(g_kern_disks, sb, M_WAITOK, NULL); 760 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1); 761 sbuf_delete(sb); 762 return error; 763} 764 765SYSCTL_PROC(_kern, OID_AUTO, disks, 766 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 767 sysctl_disks, "A", "names of available disks"); 768