geom_disk.c revision 251654
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 251654 2013-06-12 13:36:20Z mav $"); 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_flags & DISKFLAG_CANDELETE) { 152 if (bootverbose && dp->d_delmaxsize == 0) { 153 printf("WARNING: Disk drive %s%d has no d_delmaxsize\n", 154 dp->d_name, dp->d_unit); 155 dp->d_delmaxsize = dp->d_maxsize; 156 } 157 } else { 158 dp->d_delmaxsize = 0; 159 } 160 pp->stripeoffset = dp->d_stripeoffset; 161 pp->stripesize = dp->d_stripesize; 162 dp->d_flags |= DISKFLAG_OPEN; 163 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) { 164 if (dp->d_close != NULL) { 165 g_disk_lock_giant(dp); 166 error = dp->d_close(dp); 167 if (error != 0) 168 printf("Closed disk %s -> %d\n", 169 pp->name, error); 170 g_disk_unlock_giant(dp); 171 } 172 sc->state = G_STATE_ACTIVE; 173 if (sc->led[0] != 0) 174 led_set(sc->led, "0"); 175 dp->d_flags &= ~DISKFLAG_OPEN; 176 } 177 return (error); 178} 179 180static void 181g_disk_kerneldump(struct bio *bp, struct disk *dp) 182{ 183 struct g_kerneldump *gkd; 184 struct g_geom *gp; 185 186 gkd = (struct g_kerneldump*)bp->bio_data; 187 gp = bp->bio_to->geom; 188 g_trace(G_T_TOPOLOGY, "g_disk_kernedump(%s, %jd, %jd)", 189 gp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length); 190 if (dp->d_dump == NULL) { 191 g_io_deliver(bp, ENODEV); 192 return; 193 } 194 gkd->di.dumper = dp->d_dump; 195 gkd->di.priv = dp; 196 gkd->di.blocksize = dp->d_sectorsize; 197 gkd->di.maxiosize = dp->d_maxsize; 198 gkd->di.mediaoffset = gkd->offset; 199 if ((gkd->offset + gkd->length) > dp->d_mediasize) 200 gkd->length = dp->d_mediasize - gkd->offset; 201 gkd->di.mediasize = gkd->length; 202 g_io_deliver(bp, 0); 203} 204 205static void 206g_disk_setstate(struct bio *bp, struct g_disk_softc *sc) 207{ 208 const char *cmd; 209 210 memcpy(&sc->state, bp->bio_data, sizeof(sc->state)); 211 if (sc->led[0] != 0) { 212 switch (sc->state) { 213 case G_STATE_FAILED: 214 cmd = "1"; 215 break; 216 case G_STATE_REBUILD: 217 cmd = "f5"; 218 break; 219 case G_STATE_RESYNC: 220 cmd = "f1"; 221 break; 222 default: 223 cmd = "0"; 224 break; 225 } 226 led_set(sc->led, cmd); 227 } 228 g_io_deliver(bp, 0); 229} 230 231static void 232g_disk_done(struct bio *bp) 233{ 234 struct bio *bp2; 235 struct g_disk_softc *sc; 236 237 /* See "notes" for why we need a mutex here */ 238 /* XXX: will witness accept a mix of Giant/unGiant drivers here ? */ 239 bp2 = bp->bio_parent; 240 sc = bp2->bio_to->private; 241 bp->bio_completed = bp->bio_length - bp->bio_resid; 242 mtx_lock(&sc->done_mtx); 243 if (bp2->bio_error == 0) 244 bp2->bio_error = bp->bio_error; 245 bp2->bio_completed += bp->bio_completed; 246 if ((bp->bio_cmd & (BIO_READ|BIO_WRITE|BIO_DELETE)) != 0) 247 devstat_end_transaction_bio(sc->dp->d_devstat, bp); 248 g_destroy_bio(bp); 249 bp2->bio_inbed++; 250 if (bp2->bio_children == bp2->bio_inbed) { 251 bp2->bio_resid = bp2->bio_bcount - bp2->bio_completed; 252 g_io_deliver(bp2, bp2->bio_error); 253 } 254 mtx_unlock(&sc->done_mtx); 255} 256 257static int 258g_disk_ioctl(struct g_provider *pp, u_long cmd, void * data, int fflag, struct thread *td) 259{ 260 struct disk *dp; 261 struct g_disk_softc *sc; 262 int error; 263 264 sc = pp->private; 265 dp = sc->dp; 266 267 if (dp->d_ioctl == NULL) 268 return (ENOIOCTL); 269 g_disk_lock_giant(dp); 270 error = dp->d_ioctl(dp, cmd, data, fflag, td); 271 g_disk_unlock_giant(dp); 272 return (error); 273} 274 275static void 276g_disk_start(struct bio *bp) 277{ 278 struct bio *bp2, *bp3; 279 struct disk *dp; 280 struct g_disk_softc *sc; 281 int error; 282 off_t off; 283 284 sc = bp->bio_to->private; 285 if (sc == NULL || (dp = sc->dp) == NULL || dp->d_destroyed) { 286 g_io_deliver(bp, ENXIO); 287 return; 288 } 289 error = EJUSTRETURN; 290 switch(bp->bio_cmd) { 291 case BIO_DELETE: 292 if (!(dp->d_flags & DISKFLAG_CANDELETE)) { 293 error = EOPNOTSUPP; 294 break; 295 } 296 /* fall-through */ 297 case BIO_READ: 298 case BIO_WRITE: 299 off = 0; 300 bp3 = NULL; 301 bp2 = g_clone_bio(bp); 302 if (bp2 == NULL) { 303 error = ENOMEM; 304 break; 305 } 306 do { 307 off_t d_maxsize; 308 309 d_maxsize = (bp->bio_cmd == BIO_DELETE) ? 310 dp->d_delmaxsize : dp->d_maxsize; 311 bp2->bio_offset += off; 312 bp2->bio_length -= off; 313 if ((bp->bio_flags & BIO_UNMAPPED) == 0) { 314 bp2->bio_data += off; 315 } else { 316 KASSERT((dp->d_flags & DISKFLAG_UNMAPPED_BIO) 317 != 0, 318 ("unmapped bio not supported by disk %s", 319 dp->d_name)); 320 bp2->bio_ma += off / PAGE_SIZE; 321 bp2->bio_ma_offset += off; 322 bp2->bio_ma_offset %= PAGE_SIZE; 323 bp2->bio_ma_n -= off / PAGE_SIZE; 324 } 325 if (bp2->bio_length > d_maxsize) { 326 /* 327 * XXX: If we have a stripesize we should really 328 * use it here. Care should be taken in the delete 329 * case if this is done as deletes can be very 330 * sensitive to size given how they are processed. 331 */ 332 bp2->bio_length = d_maxsize; 333 if ((bp->bio_flags & BIO_UNMAPPED) != 0) { 334 bp2->bio_ma_n = howmany( 335 bp2->bio_ma_offset + 336 bp2->bio_length, PAGE_SIZE); 337 } 338 off += d_maxsize; 339 /* 340 * To avoid a race, we need to grab the next bio 341 * before we schedule this one. See "notes". 342 */ 343 bp3 = g_clone_bio(bp); 344 if (bp3 == NULL) 345 bp->bio_error = ENOMEM; 346 } 347 bp2->bio_done = g_disk_done; 348 bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize; 349 bp2->bio_bcount = bp2->bio_length; 350 bp2->bio_disk = dp; 351 devstat_start_transaction_bio(dp->d_devstat, bp2); 352 g_disk_lock_giant(dp); 353 dp->d_strategy(bp2); 354 g_disk_unlock_giant(dp); 355 bp2 = bp3; 356 bp3 = NULL; 357 } while (bp2 != NULL); 358 break; 359 case BIO_GETATTR: 360 /* Give the driver a chance to override */ 361 if (dp->d_getattr != NULL) { 362 if (bp->bio_disk == NULL) 363 bp->bio_disk = dp; 364 error = dp->d_getattr(bp); 365 if (error != -1) 366 break; 367 error = EJUSTRETURN; 368 } 369 if (g_handleattr_int(bp, "GEOM::candelete", 370 (dp->d_flags & DISKFLAG_CANDELETE) != 0)) 371 break; 372 else if (g_handleattr_int(bp, "GEOM::fwsectors", 373 dp->d_fwsectors)) 374 break; 375 else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads)) 376 break; 377 else if (g_handleattr_off_t(bp, "GEOM::frontstuff", 0)) 378 break; 379 else if (g_handleattr_str(bp, "GEOM::ident", dp->d_ident)) 380 break; 381 else if (g_handleattr(bp, "GEOM::hba_vendor", 382 &dp->d_hba_vendor, 2)) 383 break; 384 else if (g_handleattr(bp, "GEOM::hba_device", 385 &dp->d_hba_device, 2)) 386 break; 387 else if (g_handleattr(bp, "GEOM::hba_subvendor", 388 &dp->d_hba_subvendor, 2)) 389 break; 390 else if (g_handleattr(bp, "GEOM::hba_subdevice", 391 &dp->d_hba_subdevice, 2)) 392 break; 393 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump")) 394 g_disk_kerneldump(bp, dp); 395 else if (!strcmp(bp->bio_attribute, "GEOM::setstate")) 396 g_disk_setstate(bp, sc); 397 else 398 error = ENOIOCTL; 399 break; 400 case BIO_FLUSH: 401 g_trace(G_T_BIO, "g_disk_flushcache(%s)", 402 bp->bio_to->name); 403 if (!(dp->d_flags & DISKFLAG_CANFLUSHCACHE)) { 404 error = EOPNOTSUPP; 405 break; 406 } 407 bp2 = g_clone_bio(bp); 408 if (bp2 == NULL) { 409 g_io_deliver(bp, ENOMEM); 410 return; 411 } 412 bp2->bio_done = g_disk_done; 413 bp2->bio_disk = dp; 414 g_disk_lock_giant(dp); 415 dp->d_strategy(bp2); 416 g_disk_unlock_giant(dp); 417 break; 418 default: 419 error = EOPNOTSUPP; 420 break; 421 } 422 if (error != EJUSTRETURN) 423 g_io_deliver(bp, error); 424 return; 425} 426 427static void 428g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp) 429{ 430 struct bio *bp; 431 struct disk *dp; 432 struct g_disk_softc *sc; 433 char *buf; 434 int res = 0; 435 436 sc = gp->softc; 437 if (sc == NULL || (dp = sc->dp) == NULL) 438 return; 439 if (indent == NULL) { 440 sbuf_printf(sb, " hd %u", dp->d_fwheads); 441 sbuf_printf(sb, " sc %u", dp->d_fwsectors); 442 return; 443 } 444 if (pp != NULL) { 445 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n", 446 indent, dp->d_fwheads); 447 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n", 448 indent, dp->d_fwsectors); 449 if (dp->d_getattr != NULL) { 450 buf = g_malloc(DISK_IDENT_SIZE, M_WAITOK); 451 bp = g_alloc_bio(); 452 bp->bio_disk = dp; 453 bp->bio_attribute = "GEOM::ident"; 454 bp->bio_length = DISK_IDENT_SIZE; 455 bp->bio_data = buf; 456 res = dp->d_getattr(bp); 457 sbuf_printf(sb, "%s<ident>%s</ident>\n", indent, 458 res == 0 ? buf: dp->d_ident); 459 bp->bio_attribute = "GEOM::lunid"; 460 bp->bio_length = DISK_IDENT_SIZE; 461 bp->bio_data = buf; 462 if (dp->d_getattr(bp) == 0) 463 sbuf_printf(sb, "%s<lunid>%s</lunid>\n", 464 indent, buf); 465 g_destroy_bio(bp); 466 g_free(buf); 467 } else 468 sbuf_printf(sb, "%s<ident>%s</ident>\n", indent, 469 dp->d_ident); 470 sbuf_printf(sb, "%s<descr>%s</descr>\n", indent, dp->d_descr); 471 } 472} 473 474static void 475g_disk_resize(void *ptr, int flag) 476{ 477 struct disk *dp; 478 struct g_geom *gp; 479 struct g_provider *pp; 480 481 if (flag == EV_CANCEL) 482 return; 483 g_topology_assert(); 484 485 dp = ptr; 486 gp = dp->d_geom; 487 488 if (dp->d_destroyed || gp == NULL) 489 return; 490 491 LIST_FOREACH(pp, &gp->provider, provider) { 492 if (pp->sectorsize != 0 && 493 pp->sectorsize != dp->d_sectorsize) 494 g_wither_provider(pp, ENXIO); 495 else 496 g_resize_provider(pp, dp->d_mediasize); 497 } 498} 499 500static void 501g_disk_create(void *arg, int flag) 502{ 503 struct g_geom *gp; 504 struct g_provider *pp; 505 struct disk *dp; 506 struct g_disk_softc *sc; 507 char tmpstr[80]; 508 509 if (flag == EV_CANCEL) 510 return; 511 g_topology_assert(); 512 dp = arg; 513 sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO); 514 mtx_init(&sc->done_mtx, "g_disk_done", NULL, MTX_DEF); 515 sc->dp = dp; 516 gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit); 517 gp->softc = sc; 518 pp = g_new_providerf(gp, "%s", gp->name); 519 pp->mediasize = dp->d_mediasize; 520 pp->sectorsize = dp->d_sectorsize; 521 pp->stripeoffset = dp->d_stripeoffset; 522 pp->stripesize = dp->d_stripesize; 523 if ((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0) 524 pp->flags |= G_PF_ACCEPT_UNMAPPED; 525 if (bootverbose) 526 printf("GEOM: new disk %s\n", gp->name); 527 sysctl_ctx_init(&sc->sysctl_ctx); 528 snprintf(tmpstr, sizeof(tmpstr), "GEOM disk %s", gp->name); 529 sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx, 530 SYSCTL_STATIC_CHILDREN(_kern_geom_disk), OID_AUTO, gp->name, 531 CTLFLAG_RD, 0, tmpstr); 532 if (sc->sysctl_tree != NULL) { 533 snprintf(tmpstr, sizeof(tmpstr), 534 "kern.geom.disk.%s.led", gp->name); 535 TUNABLE_STR_FETCH(tmpstr, sc->led, sizeof(sc->led)); 536 SYSCTL_ADD_STRING(&sc->sysctl_ctx, 537 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "led", 538 CTLFLAG_RW | CTLFLAG_TUN, sc->led, sizeof(sc->led), 539 "LED name"); 540 } 541 pp->private = sc; 542 dp->d_geom = gp; 543 g_error_provider(pp, 0); 544} 545 546/* 547 * We get this callback after all of the consumers have gone away, and just 548 * before the provider is freed. If the disk driver provided a d_gone 549 * callback, let them know that it is okay to free resources -- they won't 550 * be getting any more accesses from GEOM. 551 */ 552static void 553g_disk_providergone(struct g_provider *pp) 554{ 555 struct disk *dp; 556 struct g_disk_softc *sc; 557 558 sc = (struct g_disk_softc *)pp->private; 559 dp = sc->dp; 560 if (dp != NULL && dp->d_gone != NULL) 561 dp->d_gone(dp); 562 if (sc->sysctl_tree != NULL) { 563 sysctl_ctx_free(&sc->sysctl_ctx); 564 sc->sysctl_tree = NULL; 565 } 566 if (sc->led[0] != 0) { 567 led_set(sc->led, "0"); 568 sc->led[0] = 0; 569 } 570 pp->private = NULL; 571 pp->geom->softc = NULL; 572 mtx_destroy(&sc->done_mtx); 573 g_free(sc); 574} 575 576static void 577g_disk_destroy(void *ptr, int flag) 578{ 579 struct disk *dp; 580 struct g_geom *gp; 581 struct g_disk_softc *sc; 582 583 g_topology_assert(); 584 dp = ptr; 585 gp = dp->d_geom; 586 if (gp != NULL) { 587 sc = gp->softc; 588 if (sc != NULL) 589 sc->dp = NULL; 590 dp->d_geom = NULL; 591 g_wither_geom(gp, ENXIO); 592 } 593 g_free(dp); 594} 595 596/* 597 * We only allow printable characters in disk ident, 598 * the rest is converted to 'x<HH>'. 599 */ 600static void 601g_disk_ident_adjust(char *ident, size_t size) 602{ 603 char *p, tmp[4], newid[DISK_IDENT_SIZE]; 604 605 newid[0] = '\0'; 606 for (p = ident; *p != '\0'; p++) { 607 if (isprint(*p)) { 608 tmp[0] = *p; 609 tmp[1] = '\0'; 610 } else { 611 snprintf(tmp, sizeof(tmp), "x%02hhx", 612 *(unsigned char *)p); 613 } 614 if (strlcat(newid, tmp, sizeof(newid)) >= sizeof(newid)) 615 break; 616 } 617 bzero(ident, size); 618 strlcpy(ident, newid, size); 619} 620 621struct disk * 622disk_alloc(void) 623{ 624 625 return (g_malloc(sizeof(struct disk), M_WAITOK | M_ZERO)); 626} 627 628void 629disk_create(struct disk *dp, int version) 630{ 631 632 if (version != DISK_VERSION_02) { 633 printf("WARNING: Attempt to add disk %s%d %s", 634 dp->d_name, dp->d_unit, 635 " using incompatible ABI version of disk(9)\n"); 636 printf("WARNING: Ignoring disk %s%d\n", 637 dp->d_name, dp->d_unit); 638 return; 639 } 640 KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy")); 641 KASSERT(dp->d_name != NULL, ("disk_create need d_name")); 642 KASSERT(*dp->d_name != 0, ("disk_create need d_name")); 643 KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long")); 644 if (dp->d_devstat == NULL) 645 dp->d_devstat = devstat_new_entry(dp->d_name, dp->d_unit, 646 dp->d_sectorsize, DEVSTAT_ALL_SUPPORTED, 647 DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX); 648 dp->d_geom = NULL; 649 g_disk_ident_adjust(dp->d_ident, sizeof(dp->d_ident)); 650 g_post_event(g_disk_create, dp, M_WAITOK, dp, NULL); 651} 652 653void 654disk_destroy(struct disk *dp) 655{ 656 657 g_cancel_event(dp); 658 dp->d_destroyed = 1; 659 if (dp->d_devstat != NULL) 660 devstat_remove_entry(dp->d_devstat); 661 g_post_event(g_disk_destroy, dp, M_WAITOK, NULL); 662} 663 664void 665disk_gone(struct disk *dp) 666{ 667 struct g_geom *gp; 668 struct g_provider *pp; 669 670 gp = dp->d_geom; 671 if (gp != NULL) { 672 pp = LIST_FIRST(&gp->provider); 673 if (pp != NULL) { 674 KASSERT(LIST_NEXT(pp, provider) == NULL, 675 ("geom %p has more than one provider", gp)); 676 g_wither_provider(pp, ENXIO); 677 } 678 } 679} 680 681void 682disk_attr_changed(struct disk *dp, const char *attr, int flag) 683{ 684 struct g_geom *gp; 685 struct g_provider *pp; 686 687 gp = dp->d_geom; 688 if (gp != NULL) 689 LIST_FOREACH(pp, &gp->provider, provider) 690 (void)g_attr_changed(pp, attr, flag); 691} 692 693void 694disk_media_changed(struct disk *dp, int flag) 695{ 696 struct g_geom *gp; 697 struct g_provider *pp; 698 699 gp = dp->d_geom; 700 if (gp != NULL) { 701 pp = LIST_FIRST(&gp->provider); 702 if (pp != NULL) { 703 KASSERT(LIST_NEXT(pp, provider) == NULL, 704 ("geom %p has more than one provider", gp)); 705 g_media_changed(pp, flag); 706 } 707 } 708} 709 710void 711disk_media_gone(struct disk *dp, int flag) 712{ 713 struct g_geom *gp; 714 struct g_provider *pp; 715 716 gp = dp->d_geom; 717 if (gp != NULL) { 718 pp = LIST_FIRST(&gp->provider); 719 if (pp != NULL) { 720 KASSERT(LIST_NEXT(pp, provider) == NULL, 721 ("geom %p has more than one provider", gp)); 722 g_media_gone(pp, flag); 723 } 724 } 725} 726 727int 728disk_resize(struct disk *dp, int flag) 729{ 730 731 if (dp->d_destroyed || dp->d_geom == NULL) 732 return (0); 733 734 return (g_post_event(g_disk_resize, dp, flag, NULL)); 735} 736 737static void 738g_kern_disks(void *p, int flag __unused) 739{ 740 struct sbuf *sb; 741 struct g_geom *gp; 742 char *sp; 743 744 sb = p; 745 sp = ""; 746 g_topology_assert(); 747 LIST_FOREACH(gp, &g_disk_class.geom, geom) { 748 sbuf_printf(sb, "%s%s", sp, gp->name); 749 sp = " "; 750 } 751 sbuf_finish(sb); 752} 753 754static int 755sysctl_disks(SYSCTL_HANDLER_ARGS) 756{ 757 int error; 758 struct sbuf *sb; 759 760 sb = sbuf_new_auto(); 761 g_waitfor_event(g_kern_disks, sb, M_WAITOK, NULL); 762 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1); 763 sbuf_delete(sb); 764 return error; 765} 766 767SYSCTL_PROC(_kern, OID_AUTO, disks, 768 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 769 sysctl_disks, "A", "names of available disks"); 770