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 disk *dp; 431 struct g_disk_softc *sc; 432 433 sc = gp->softc; 434 if (sc == NULL || (dp = sc->dp) == NULL) 435 return; 436 if (indent == NULL) { 437 sbuf_printf(sb, " hd %u", dp->d_fwheads); 438 sbuf_printf(sb, " sc %u", dp->d_fwsectors); 439 return; 440 } 441 if (pp != NULL) { 442 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n", 443 indent, dp->d_fwheads); 444 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n", 445 indent, dp->d_fwsectors); 446 sbuf_printf(sb, "%s<ident>%s</ident>\n", indent, dp->d_ident); 447 sbuf_printf(sb, "%s<descr>%s</descr>\n", indent, dp->d_descr); 448 } 449} 450 451static void 452g_disk_resize(void *ptr, int flag) 453{ 454 struct disk *dp; 455 struct g_geom *gp; 456 struct g_provider *pp; 457 458 if (flag == EV_CANCEL) 459 return; 460 g_topology_assert(); 461 462 dp = ptr; 463 gp = dp->d_geom; 464 465 if (dp->d_destroyed || gp == NULL) 466 return; 467 468 LIST_FOREACH(pp, &gp->provider, provider) { 469 if (pp->sectorsize != 0 && 470 pp->sectorsize != dp->d_sectorsize) 471 g_wither_provider(pp, ENXIO); 472 else 473 g_resize_provider(pp, dp->d_mediasize); 474 } 475} 476 477static void 478g_disk_create(void *arg, int flag) 479{ 480 struct g_geom *gp; 481 struct g_provider *pp; 482 struct disk *dp; 483 struct g_disk_softc *sc; 484 char tmpstr[80]; 485 486 if (flag == EV_CANCEL) 487 return; 488 g_topology_assert(); 489 dp = arg; 490 sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO); 491 mtx_init(&sc->done_mtx, "g_disk_done", NULL, MTX_DEF); 492 sc->dp = dp; 493 gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit); 494 gp->softc = sc; 495 pp = g_new_providerf(gp, "%s", gp->name); 496 pp->mediasize = dp->d_mediasize; 497 pp->sectorsize = dp->d_sectorsize; 498 pp->stripeoffset = dp->d_stripeoffset; 499 pp->stripesize = dp->d_stripesize; 500 if ((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0) 501 pp->flags |= G_PF_ACCEPT_UNMAPPED; 502 if (bootverbose) 503 printf("GEOM: new disk %s\n", gp->name); 504 sysctl_ctx_init(&sc->sysctl_ctx); 505 snprintf(tmpstr, sizeof(tmpstr), "GEOM disk %s", gp->name); 506 sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx, 507 SYSCTL_STATIC_CHILDREN(_kern_geom_disk), OID_AUTO, gp->name, 508 CTLFLAG_RD, 0, tmpstr); 509 if (sc->sysctl_tree != NULL) { 510 snprintf(tmpstr, sizeof(tmpstr), 511 "kern.geom.disk.%s.led", gp->name); 512 TUNABLE_STR_FETCH(tmpstr, sc->led, sizeof(sc->led)); 513 SYSCTL_ADD_STRING(&sc->sysctl_ctx, 514 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "led", 515 CTLFLAG_RW | CTLFLAG_TUN, sc->led, sizeof(sc->led), 516 "LED name"); 517 } 518 pp->private = sc; 519 dp->d_geom = gp; 520 g_error_provider(pp, 0); 521} 522 523/* 524 * We get this callback after all of the consumers have gone away, and just 525 * before the provider is freed. If the disk driver provided a d_gone 526 * callback, let them know that it is okay to free resources -- they won't 527 * be getting any more accesses from GEOM. 528 */ 529static void 530g_disk_providergone(struct g_provider *pp) 531{ 532 struct disk *dp; 533 struct g_disk_softc *sc; 534 535 sc = (struct g_disk_softc *)pp->private; 536 dp = sc->dp; 537 if (dp != NULL && dp->d_gone != NULL) 538 dp->d_gone(dp); 539 if (sc->sysctl_tree != NULL) { 540 sysctl_ctx_free(&sc->sysctl_ctx); 541 sc->sysctl_tree = NULL; 542 } 543 if (sc->led[0] != 0) { 544 led_set(sc->led, "0"); 545 sc->led[0] = 0; 546 } 547 pp->private = NULL; 548 pp->geom->softc = NULL; 549 mtx_destroy(&sc->done_mtx); 550 g_free(sc); 551} 552 553static void 554g_disk_destroy(void *ptr, int flag) 555{ 556 struct disk *dp; 557 struct g_geom *gp; 558 struct g_disk_softc *sc; 559 560 g_topology_assert(); 561 dp = ptr; 562 gp = dp->d_geom; 563 if (gp != NULL) { 564 sc = gp->softc; 565 if (sc != NULL) 566 sc->dp = NULL; 567 dp->d_geom = NULL; 568 g_wither_geom(gp, ENXIO); 569 } 570 g_free(dp); 571} 572 573/* 574 * We only allow printable characters in disk ident, 575 * the rest is converted to 'x<HH>'. 576 */ 577static void 578g_disk_ident_adjust(char *ident, size_t size) 579{ 580 char *p, tmp[4], newid[DISK_IDENT_SIZE]; 581 582 newid[0] = '\0'; 583 for (p = ident; *p != '\0'; p++) { 584 if (isprint(*p)) { 585 tmp[0] = *p; 586 tmp[1] = '\0'; 587 } else { 588 snprintf(tmp, sizeof(tmp), "x%02hhx", 589 *(unsigned char *)p); 590 } 591 if (strlcat(newid, tmp, sizeof(newid)) >= sizeof(newid)) 592 break; 593 } 594 bzero(ident, size); 595 strlcpy(ident, newid, size); 596} 597 598struct disk * 599disk_alloc(void) 600{ 601 602 return (g_malloc(sizeof(struct disk), M_WAITOK | M_ZERO)); 603} 604 605void 606disk_create(struct disk *dp, int version) 607{ 608 609 if (version != DISK_VERSION_02) { 610 printf("WARNING: Attempt to add disk %s%d %s", 611 dp->d_name, dp->d_unit, 612 " using incompatible ABI version of disk(9)\n"); 613 printf("WARNING: Ignoring disk %s%d\n", 614 dp->d_name, dp->d_unit); 615 return; 616 } 617 KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy")); 618 KASSERT(dp->d_name != NULL, ("disk_create need d_name")); 619 KASSERT(*dp->d_name != 0, ("disk_create need d_name")); 620 KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long")); 621 if (dp->d_devstat == NULL) 622 dp->d_devstat = devstat_new_entry(dp->d_name, dp->d_unit, 623 dp->d_sectorsize, DEVSTAT_ALL_SUPPORTED, 624 DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX); 625 dp->d_geom = NULL; 626 g_disk_ident_adjust(dp->d_ident, sizeof(dp->d_ident)); 627 g_post_event(g_disk_create, dp, M_WAITOK, dp, NULL); 628} 629 630void 631disk_destroy(struct disk *dp) 632{ 633 634 g_cancel_event(dp); 635 dp->d_destroyed = 1; 636 if (dp->d_devstat != NULL) 637 devstat_remove_entry(dp->d_devstat); 638 g_post_event(g_disk_destroy, dp, M_WAITOK, NULL); 639} 640 641void 642disk_gone(struct disk *dp) 643{ 644 struct g_geom *gp; 645 struct g_provider *pp; 646 647 gp = dp->d_geom; 648 if (gp != NULL) { 649 pp = LIST_FIRST(&gp->provider); 650 if (pp != NULL) { 651 KASSERT(LIST_NEXT(pp, provider) == NULL, 652 ("geom %p has more than one provider", gp)); 653 g_wither_provider(pp, ENXIO); 654 } 655 } 656} 657 658void 659disk_attr_changed(struct disk *dp, const char *attr, int flag) 660{ 661 struct g_geom *gp; 662 struct g_provider *pp; 663 664 gp = dp->d_geom; 665 if (gp != NULL) 666 LIST_FOREACH(pp, &gp->provider, provider) 667 (void)g_attr_changed(pp, attr, flag); 668} 669 670void 671disk_media_changed(struct disk *dp, int flag) 672{ 673 struct g_geom *gp; 674 struct g_provider *pp; 675 676 gp = dp->d_geom; 677 if (gp != NULL) { 678 pp = LIST_FIRST(&gp->provider); 679 if (pp != NULL) { 680 KASSERT(LIST_NEXT(pp, provider) == NULL, 681 ("geom %p has more than one provider", gp)); 682 g_media_changed(pp, flag); 683 } 684 } 685} 686 687void 688disk_media_gone(struct disk *dp, int flag) 689{ 690 struct g_geom *gp; 691 struct g_provider *pp; 692 693 gp = dp->d_geom; 694 if (gp != NULL) { 695 pp = LIST_FIRST(&gp->provider); 696 if (pp != NULL) { 697 KASSERT(LIST_NEXT(pp, provider) == NULL, 698 ("geom %p has more than one provider", gp)); 699 g_media_gone(pp, flag); 700 } 701 } 702} 703 704int 705disk_resize(struct disk *dp, int flag) 706{ 707 708 if (dp->d_destroyed || dp->d_geom == NULL) 709 return (0); 710 711 return (g_post_event(g_disk_resize, dp, flag, NULL)); 712} 713 714static void 715g_kern_disks(void *p, int flag __unused) 716{ 717 struct sbuf *sb; 718 struct g_geom *gp; 719 char *sp; 720 721 sb = p; 722 sp = ""; 723 g_topology_assert(); 724 LIST_FOREACH(gp, &g_disk_class.geom, geom) { 725 sbuf_printf(sb, "%s%s", sp, gp->name); 726 sp = " "; 727 } 728 sbuf_finish(sb); 729} 730 731static int 732sysctl_disks(SYSCTL_HANDLER_ARGS) 733{ 734 int error; 735 struct sbuf *sb; 736 737 sb = sbuf_new_auto(); 738 g_waitfor_event(g_kern_disks, sb, M_WAITOK, NULL); 739 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1); 740 sbuf_delete(sb); 741 return error; 742} 743 744SYSCTL_PROC(_kern, OID_AUTO, disks, 745 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 746 sysctl_disks, "A", "names of available disks");
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