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/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 62 struct 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 71 static g_access_t g_disk_access; 72 static g_start_t g_disk_start; 73 static g_ioctl_t g_disk_ioctl; 74 static g_dumpconf_t g_disk_dumpconf; 75 static g_provgone_t g_disk_providergone; 76 77 static 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 87 SYSCTL_DECL(_kern_geom); 88 static SYSCTL_NODE(_kern_geom, OID_AUTO, disk, CTLFLAG_RW, 0, 89 "GEOM_DISK stuff"); 90 91 DECLARE_GEOM_CLASS(g_disk_class, g_disk); 92 93 static void __inline 94 g_disk_lock_giant(struct disk *dp) 95 { 96 97 if (dp->d_flags & DISKFLAG_NEEDSGIANT) 98 mtx_lock(&Giant); 99 } 100 101 static void __inline 102 g_disk_unlock_giant(struct disk *dp) 103 { 104 105 if (dp->d_flags & DISKFLAG_NEEDSGIANT) 106 mtx_unlock(&Giant); 107 } 108 109 static int 110 g_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 } 177 178 static void 179 g_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 } 202 203 static void 204 g_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 } 228 229 static void 230 g_disk_done(struct bio *bp) 231 { 232 struct bintime now; 233 struct bio *bp2; 234 struct g_disk_softc *sc; 235 236 /* See "notes" for why we need a mutex here */ 237 /* XXX: will witness accept a mix of Giant/unGiant drivers here ? */ 238 bp2 = bp->bio_parent; 239 sc = bp2->bio_to->private; 240 bp->bio_completed = bp->bio_length - bp->bio_resid; 241 binuptime(&now); 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_bt(sc->dp->d_devstat, bp, &now); 248 bp2->bio_inbed++; 249 if (bp2->bio_children == bp2->bio_inbed) { 250 mtx_unlock(&sc->done_mtx); 251 bp2->bio_resid = bp2->bio_bcount - bp2->bio_completed; 252 g_io_deliver(bp2, bp2->bio_error); 253 } else 254 mtx_unlock(&sc->done_mtx); 255 g_destroy_bio(bp); 256 } 257 258 static int 259 g_disk_ioctl(struct g_provider *pp, u_long cmd, void * data, int fflag, struct thread *td) 260 { 261 struct disk *dp; 262 struct g_disk_softc *sc; 263 int error; 264 265 sc = pp->private; 266 dp = sc->dp; 267 268 if (dp->d_ioctl == NULL) 269 return (ENOIOCTL); 270 g_disk_lock_giant(dp); 271 error = dp->d_ioctl(dp, cmd, data, fflag, td); 272 g_disk_unlock_giant(dp); 273 return (error); 274 } 275 276 static void 277 g_disk_start(struct bio *bp) 278 { 279 struct bio *bp2, *bp3; 280 struct disk *dp; 281 struct g_disk_softc *sc; 282 int error; 283 off_t off; 284 285 sc = bp->bio_to->private; 286 if (sc == NULL || (dp = sc->dp) == NULL || dp->d_destroyed) { 287 g_io_deliver(bp, ENXIO); 288 return; 289 } 290 error = EJUSTRETURN; 291 switch(bp->bio_cmd) { 292 case BIO_DELETE: 293 if (!(dp->d_flags & DISKFLAG_CANDELETE)) { 294 error = EOPNOTSUPP; 295 break; 296 } 297 /* fall-through */ 298 case BIO_READ: 299 case BIO_WRITE: 300 off = 0; 301 bp3 = NULL; 302 bp2 = g_clone_bio(bp); 303 if (bp2 == NULL) { 304 error = ENOMEM; 305 break; 306 } 307 do { 308 off_t d_maxsize; 309 310 d_maxsize = (bp->bio_cmd == BIO_DELETE) ? 311 dp->d_delmaxsize : dp->d_maxsize; 312 bp2->bio_offset += off; 313 bp2->bio_length -= off; 314 if ((bp->bio_flags & BIO_UNMAPPED) == 0) { 315 bp2->bio_data += off; 316 } else { 317 KASSERT((dp->d_flags & DISKFLAG_UNMAPPED_BIO) 318 != 0, 319 ("unmapped bio not supported by disk %s", 320 dp->d_name)); 321 bp2->bio_ma += off / PAGE_SIZE; 322 bp2->bio_ma_offset += off; 323 bp2->bio_ma_offset %= PAGE_SIZE; 324 bp2->bio_ma_n -= off / PAGE_SIZE; 325 } 326 if (bp2->bio_length > d_maxsize) { 327 /* 328 * XXX: If we have a stripesize we should really 329 * use it here. Care should be taken in the delete 330 * case if this is done as deletes can be very 331 * sensitive to size given how they are processed. 332 */ 333 bp2->bio_length = d_maxsize; 334 if ((bp->bio_flags & BIO_UNMAPPED) != 0) { 335 bp2->bio_ma_n = howmany( 336 bp2->bio_ma_offset + 337 bp2->bio_length, PAGE_SIZE); 338 } 339 off += d_maxsize; 340 /* 341 * To avoid a race, we need to grab the next bio 342 * before we schedule this one. See "notes". 343 */ 344 bp3 = g_clone_bio(bp); 345 if (bp3 == NULL) 346 bp->bio_error = ENOMEM; 347 } 348 bp2->bio_done = g_disk_done; 349 bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize; 350 bp2->bio_bcount = bp2->bio_length; 351 bp2->bio_disk = dp; 352 devstat_start_transaction_bio(dp->d_devstat, bp2); 353 g_disk_lock_giant(dp); 354 dp->d_strategy(bp2); 355 g_disk_unlock_giant(dp); 356 bp2 = bp3; 357 bp3 = NULL; 358 } while (bp2 != NULL); 359 break; 360 case BIO_GETATTR: 361 /* Give the driver a chance to override */ 362 if (dp->d_getattr != NULL) { 363 if (bp->bio_disk == NULL) 364 bp->bio_disk = dp; 365 error = dp->d_getattr(bp); 366 if (error != -1) 367 break; 368 error = EJUSTRETURN; 369 } 370 if (g_handleattr_int(bp, "GEOM::candelete", 371 (dp->d_flags & DISKFLAG_CANDELETE) != 0)) 372 break; 373 else if (g_handleattr_int(bp, "GEOM::fwsectors", 374 dp->d_fwsectors)) 375 break; 376 else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads)) 377 break; 378 else if (g_handleattr_off_t(bp, "GEOM::frontstuff", 0)) 379 break; 380 else if (g_handleattr_str(bp, "GEOM::ident", dp->d_ident)) 381 break; 382 else if (g_handleattr(bp, "GEOM::hba_vendor", 383 &dp->d_hba_vendor, 2)) 384 break; 385 else if (g_handleattr(bp, "GEOM::hba_device", 386 &dp->d_hba_device, 2)) 387 break; 388 else if (g_handleattr(bp, "GEOM::hba_subvendor", 389 &dp->d_hba_subvendor, 2)) 390 break; 391 else if (g_handleattr(bp, "GEOM::hba_subdevice", 392 &dp->d_hba_subdevice, 2)) 393 break; 394 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump")) 395 g_disk_kerneldump(bp, dp); 396 else if (!strcmp(bp->bio_attribute, "GEOM::setstate")) 397 g_disk_setstate(bp, sc); 398 else 399 error = ENOIOCTL; 400 break; 401 case BIO_FLUSH: 402 g_trace(G_T_BIO, "g_disk_flushcache(%s)", 403 bp->bio_to->name); 404 if (!(dp->d_flags & DISKFLAG_CANFLUSHCACHE)) { 405 error = EOPNOTSUPP; 406 break; 407 } 408 bp2 = g_clone_bio(bp); 409 if (bp2 == NULL) { 410 g_io_deliver(bp, ENOMEM); 411 return; 412 } 413 bp2->bio_done = g_disk_done; 414 bp2->bio_disk = dp; 415 g_disk_lock_giant(dp); 416 dp->d_strategy(bp2); 417 g_disk_unlock_giant(dp); 418 break; 419 default: 420 error = EOPNOTSUPP; 421 break; 422 } 423 if (error != EJUSTRETURN) 424 g_io_deliver(bp, error); 425 return; 426 } 427 428 static void 429 g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp) 430 { 431 struct bio *bp; 432 struct disk *dp; 433 struct g_disk_softc *sc; 434 char *buf; 435 int res = 0; 436 437 sc = gp->softc; 438 if (sc == NULL || (dp = sc->dp) == NULL) 439 return; 440 if (indent == NULL) { 441 sbuf_printf(sb, " hd %u", dp->d_fwheads); 442 sbuf_printf(sb, " sc %u", dp->d_fwsectors); 443 return; 444 } 445 if (pp != NULL) { 446 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n", 447 indent, dp->d_fwheads); 448 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n", 449 indent, dp->d_fwsectors); 450 if (dp->d_getattr != NULL) { 451 buf = g_malloc(DISK_IDENT_SIZE, M_WAITOK); 452 bp = g_alloc_bio(); 453 bp->bio_disk = dp; 454 bp->bio_attribute = "GEOM::ident"; 455 bp->bio_length = DISK_IDENT_SIZE; 456 bp->bio_data = buf; 457 res = dp->d_getattr(bp); 458 sbuf_printf(sb, "%s<ident>%s</ident>\n", indent, 459 res == 0 ? buf: dp->d_ident); 460 bp->bio_attribute = "GEOM::lunid"; 461 bp->bio_length = DISK_IDENT_SIZE; 462 bp->bio_data = buf; 463 if (dp->d_getattr(bp) == 0) 464 sbuf_printf(sb, "%s<lunid>%s</lunid>\n", 465 indent, buf); 466 bp->bio_attribute = "GEOM::lunname"; 467 bp->bio_length = DISK_IDENT_SIZE; 468 bp->bio_data = buf; 469 if (dp->d_getattr(bp) == 0) 470 sbuf_printf(sb, "%s<lunname>%s</lunname>\n", 471 indent, buf); 472 g_destroy_bio(bp); 473 g_free(buf); 474 } else 475 sbuf_printf(sb, "%s<ident>%s</ident>\n", indent, 476 dp->d_ident); 477 sbuf_printf(sb, "%s<descr>%s</descr>\n", indent, dp->d_descr); 478 } 479 } 480 481 static void 482 g_disk_resize(void *ptr, int flag) 483 { 484 struct disk *dp; 485 struct g_geom *gp; 486 struct g_provider *pp; 487 488 if (flag == EV_CANCEL) 489 return; 490 g_topology_assert(); 491 492 dp = ptr; 493 gp = dp->d_geom; 494 495 if (dp->d_destroyed || gp == NULL) 496 return; 497 498 LIST_FOREACH(pp, &gp->provider, provider) { 499 if (pp->sectorsize != 0 && 500 pp->sectorsize != dp->d_sectorsize) 501 g_wither_provider(pp, ENXIO); 502 else 503 g_resize_provider(pp, dp->d_mediasize); 504 } 505 } 506 507 static void 508 g_disk_create(void *arg, int flag) 509 { 510 struct g_geom *gp; 511 struct g_provider *pp; 512 struct disk *dp; 513 struct g_disk_softc *sc; 514 char tmpstr[80]; 515 516 if (flag == EV_CANCEL) 517 return; 518 g_topology_assert(); 519 dp = arg; 520 sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO); 521 mtx_init(&sc->done_mtx, "g_disk_done", NULL, MTX_DEF); 522 sc->dp = dp; 523 gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit); 524 gp->softc = sc; 525 pp = g_new_providerf(gp, "%s", gp->name); 526 pp->mediasize = dp->d_mediasize; 527 pp->sectorsize = dp->d_sectorsize; 528 pp->stripeoffset = dp->d_stripeoffset; 529 pp->stripesize = dp->d_stripesize; 530 if ((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0) 531 pp->flags |= G_PF_ACCEPT_UNMAPPED; 532 if (bootverbose) 533 printf("GEOM: new disk %s\n", gp->name); 534 sysctl_ctx_init(&sc->sysctl_ctx); 535 snprintf(tmpstr, sizeof(tmpstr), "GEOM disk %s", gp->name); 536 sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx, 537 SYSCTL_STATIC_CHILDREN(_kern_geom_disk), OID_AUTO, gp->name, 538 CTLFLAG_RD, 0, tmpstr); 539 if (sc->sysctl_tree != NULL) { 540 snprintf(tmpstr, sizeof(tmpstr), 541 "kern.geom.disk.%s.led", gp->name); 542 TUNABLE_STR_FETCH(tmpstr, sc->led, sizeof(sc->led)); 543 SYSCTL_ADD_STRING(&sc->sysctl_ctx, 544 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "led", 545 CTLFLAG_RW | CTLFLAG_TUN, sc->led, sizeof(sc->led), 546 "LED name"); 547 } 548 pp->private = sc; 549 dp->d_geom = gp; 550 g_error_provider(pp, 0); 551 } 552 553 /* 554 * We get this callback after all of the consumers have gone away, and just 555 * before the provider is freed. If the disk driver provided a d_gone 556 * callback, let them know that it is okay to free resources -- they won't 557 * be getting any more accesses from GEOM. 558 */ 559 static void 560 g_disk_providergone(struct g_provider *pp) 561 { 562 struct disk *dp; 563 struct g_disk_softc *sc; 564 565 sc = (struct g_disk_softc *)pp->private; 566 dp = sc->dp; 567 if (dp != NULL && dp->d_gone != NULL) 568 dp->d_gone(dp); 569 if (sc->sysctl_tree != NULL) { 570 sysctl_ctx_free(&sc->sysctl_ctx); 571 sc->sysctl_tree = NULL; 572 } 573 if (sc->led[0] != 0) { 574 led_set(sc->led, "0"); 575 sc->led[0] = 0; 576 } 577 pp->private = NULL; 578 pp->geom->softc = NULL; 579 mtx_destroy(&sc->done_mtx); 580 g_free(sc); 581 } 582 583 static void 584 g_disk_destroy(void *ptr, int flag) 585 { 586 struct disk *dp; 587 struct g_geom *gp; 588 struct g_disk_softc *sc; 589 590 g_topology_assert(); 591 dp = ptr; 592 gp = dp->d_geom; 593 if (gp != NULL) { 594 sc = gp->softc; 595 if (sc != NULL) 596 sc->dp = NULL; 597 dp->d_geom = NULL; 598 g_wither_geom(gp, ENXIO); 599 } 600 g_free(dp); 601 } 602 603 /* 604 * We only allow printable characters in disk ident, 605 * the rest is converted to 'x<HH>'. 606 */ 607 static void 608 g_disk_ident_adjust(char *ident, size_t size) 609 { 610 char *p, tmp[4], newid[DISK_IDENT_SIZE]; 611 612 newid[0] = '\0'; 613 for (p = ident; *p != '\0'; p++) { 614 if (isprint(*p)) { 615 tmp[0] = *p; 616 tmp[1] = '\0'; 617 } else { 618 snprintf(tmp, sizeof(tmp), "x%02hhx", 619 *(unsigned char *)p); 620 } 621 if (strlcat(newid, tmp, sizeof(newid)) >= sizeof(newid)) 622 break; 623 } 624 bzero(ident, size); 625 strlcpy(ident, newid, size); 626 } 627 628 struct disk * 629 disk_alloc(void) 630 { 631 632 return (g_malloc(sizeof(struct disk), M_WAITOK | M_ZERO)); 633 } 634 635 void 636 disk_create(struct disk *dp, int version) 637 { 638 639 if (version != DISK_VERSION) { 640 printf("WARNING: Attempt to add disk %s%d %s", 641 dp->d_name, dp->d_unit, 642 " using incompatible ABI version of disk(9)\n"); 643 printf("WARNING: Ignoring disk %s%d\n", 644 dp->d_name, dp->d_unit); 645 return; 646 } 647 KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy")); 648 KASSERT(dp->d_name != NULL, ("disk_create need d_name")); 649 KASSERT(*dp->d_name != 0, ("disk_create need d_name")); 650 KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long")); 651 if (dp->d_devstat == NULL) 652 dp->d_devstat = devstat_new_entry(dp->d_name, dp->d_unit, 653 dp->d_sectorsize, DEVSTAT_ALL_SUPPORTED, 654 DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX); 655 dp->d_geom = NULL; 656 g_disk_ident_adjust(dp->d_ident, sizeof(dp->d_ident)); 657 g_post_event(g_disk_create, dp, M_WAITOK, dp, NULL); 658 } 659 660 void 661 disk_destroy(struct disk *dp) 662 { 663 664 g_cancel_event(dp); 665 dp->d_destroyed = 1; 666 if (dp->d_devstat != NULL) 667 devstat_remove_entry(dp->d_devstat); 668 g_post_event(g_disk_destroy, dp, M_WAITOK, NULL); 669 } 670 671 void 672 disk_gone(struct disk *dp) 673 { 674 struct g_geom *gp; 675 struct g_provider *pp; 676 677 gp = dp->d_geom; 678 if (gp != NULL) { 679 pp = LIST_FIRST(&gp->provider); 680 if (pp != NULL) { 681 KASSERT(LIST_NEXT(pp, provider) == NULL, 682 ("geom %p has more than one provider", gp)); 683 g_wither_provider(pp, ENXIO); 684 } 685 } 686 } 687 688 void 689 disk_attr_changed(struct disk *dp, const char *attr, int flag) 690 { 691 struct g_geom *gp; 692 struct g_provider *pp; 693 694 gp = dp->d_geom; 695 if (gp != NULL) 696 LIST_FOREACH(pp, &gp->provider, provider) 697 (void)g_attr_changed(pp, attr, flag); 698 } 699 700 void 701 disk_media_changed(struct disk *dp, int flag) 702 { 703 struct g_geom *gp; 704 struct g_provider *pp; 705 706 gp = dp->d_geom; 707 if (gp != NULL) { 708 pp = LIST_FIRST(&gp->provider); 709 if (pp != NULL) { 710 KASSERT(LIST_NEXT(pp, provider) == NULL, 711 ("geom %p has more than one provider", gp)); 712 g_media_changed(pp, flag); 713 } 714 } 715 } 716 717 void 718 disk_media_gone(struct disk *dp, int flag) 719 { 720 struct g_geom *gp; 721 struct g_provider *pp; 722 723 gp = dp->d_geom; 724 if (gp != NULL) { 725 pp = LIST_FIRST(&gp->provider); 726 if (pp != NULL) { 727 KASSERT(LIST_NEXT(pp, provider) == NULL, 728 ("geom %p has more than one provider", gp)); 729 g_media_gone(pp, flag); 730 } 731 } 732 } 733 734 int 735 disk_resize(struct disk *dp, int flag) 736 { 737 738 if (dp->d_destroyed || dp->d_geom == NULL) 739 return (0); 740 741 return (g_post_event(g_disk_resize, dp, flag, NULL)); 742 } 743 744 static void 745 g_kern_disks(void *p, int flag __unused) 746 { 747 struct sbuf *sb; 748 struct g_geom *gp; 749 char *sp; 750 751 sb = p; 752 sp = ""; 753 g_topology_assert(); 754 LIST_FOREACH(gp, &g_disk_class.geom, geom) { 755 sbuf_printf(sb, "%s%s", sp, gp->name); 756 sp = " "; 757 } 758 sbuf_finish(sb); 759 } 760 761 static int 762 sysctl_disks(SYSCTL_HANDLER_ARGS) 763 { 764 int error; 765 struct sbuf *sb; 766 767 sb = sbuf_new_auto(); 768 g_waitfor_event(g_kern_disks, sb, M_WAITOK, NULL); 769 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1); 770 sbuf_delete(sb); 771 return error; 772 } 773 774 SYSCTL_PROC(_kern, OID_AUTO, disks, 775 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 776 sysctl_disks, "A", "names of available disks"); 777