1/*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2002 Poul-Henning Kamp 5 * Copyright (c) 2002 Networks Associates Technology, Inc. 6 * All rights reserved. 7 * 8 * This software was developed for the FreeBSD Project by Poul-Henning Kamp 9 * and NAI Labs, the Security Research Division of Network Associates, Inc. 10 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the 11 * DARPA CHATS research program. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. The names of the authors may not be used to endorse or promote 22 * products derived from this software without specific prior written 23 * permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 */ 37 38#include <sys/cdefs.h> 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/devctl.h> 48#include <sys/fcntl.h> 49#include <sys/malloc.h> 50#include <sys/msan.h> 51#include <sys/sbuf.h> 52#include <sys/devicestat.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#include <machine/bus.h> 63 64struct g_disk_softc { 65 struct disk *dp; 66 struct devstat *d_devstat; 67 struct sysctl_ctx_list sysctl_ctx; 68 struct sysctl_oid *sysctl_tree; 69 char led[64]; 70 uint32_t state; 71 struct mtx done_mtx; 72 bool flush_notsup_succeed; 73}; 74 75static g_access_t g_disk_access; 76static g_start_t g_disk_start; 77static g_ioctl_t g_disk_ioctl; 78static g_dumpconf_t g_disk_dumpconf; 79static g_provgone_t g_disk_providergone; 80 81static int g_disk_sysctl_flags(SYSCTL_HANDLER_ARGS); 82 83static struct g_class g_disk_class = { 84 .name = G_DISK_CLASS_NAME, 85 .version = G_VERSION, 86 .start = g_disk_start, 87 .access = g_disk_access, 88 .ioctl = g_disk_ioctl, 89 .providergone = g_disk_providergone, 90 .dumpconf = g_disk_dumpconf, 91}; 92 93SYSCTL_DECL(_kern_geom); 94static SYSCTL_NODE(_kern_geom, OID_AUTO, disk, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 95 "GEOM_DISK stuff"); 96 97DECLARE_GEOM_CLASS(g_disk_class, g_disk); 98 99static int 100g_disk_access(struct g_provider *pp, int r, int w, int e) 101{ 102 struct disk *dp; 103 struct g_disk_softc *sc; 104 int error; 105 106 g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)", 107 pp->name, r, w, e); 108 g_topology_assert(); 109 sc = pp->private; 110 if ((dp = sc->dp) == NULL || dp->d_destroyed) { 111 /* 112 * Allow decreasing access count even if disk is not 113 * available anymore. 114 */ 115 if (r <= 0 && w <= 0 && e <= 0) 116 return (0); 117 return (ENXIO); 118 } 119 r += pp->acr; 120 w += pp->acw; 121 e += pp->ace; 122 error = 0; 123 if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) { 124 /* 125 * It would be better to defer this decision to d_open if 126 * it was able to take flags. 127 */ 128 if (w > 0 && (dp->d_flags & DISKFLAG_WRITE_PROTECT) != 0) 129 error = EROFS; 130 if (error == 0 && dp->d_open != NULL) 131 error = dp->d_open(dp); 132 if (bootverbose && error != 0) 133 printf("Opened disk %s -> %d\n", pp->name, error); 134 if (error != 0) 135 return (error); 136 pp->sectorsize = dp->d_sectorsize; 137 if (dp->d_maxsize == 0) { 138 printf("WARNING: Disk drive %s%d has no d_maxsize\n", 139 dp->d_name, dp->d_unit); 140 dp->d_maxsize = DFLTPHYS; 141 } 142 if (dp->d_delmaxsize == 0) { 143 if (bootverbose && dp->d_flags & DISKFLAG_CANDELETE) { 144 printf("WARNING: Disk drive %s%d has no " 145 "d_delmaxsize\n", dp->d_name, dp->d_unit); 146 } 147 dp->d_delmaxsize = dp->d_maxsize; 148 } 149 pp->stripeoffset = dp->d_stripeoffset; 150 pp->stripesize = dp->d_stripesize; 151 dp->d_flags |= DISKFLAG_OPEN; 152 /* 153 * Do not invoke resize event when initial size was zero. 154 * Some disks report its size only after first opening. 155 */ 156 if (pp->mediasize == 0) 157 pp->mediasize = dp->d_mediasize; 158 else 159 g_resize_provider(pp, dp->d_mediasize); 160 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) { 161 if (dp->d_close != NULL) { 162 error = dp->d_close(dp); 163 if (error != 0) 164 printf("Closed disk %s -> %d\n", 165 pp->name, error); 166 } 167 sc->state = G_STATE_ACTIVE; 168 if (sc->led[0] != 0) 169 led_set(sc->led, "0"); 170 dp->d_flags &= ~DISKFLAG_OPEN; 171 } 172 return (error); 173} 174 175static void 176g_disk_kerneldump(struct bio *bp, struct disk *dp) 177{ 178 struct g_kerneldump *gkd; 179 struct g_geom *gp; 180 181 gkd = (struct g_kerneldump*)bp->bio_data; 182 gp = bp->bio_to->geom; 183 g_trace(G_T_TOPOLOGY, "g_disk_kerneldump(%s, %jd, %jd)", 184 gp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length); 185 if (dp->d_dump == NULL) { 186 g_io_deliver(bp, ENODEV); 187 return; 188 } 189 gkd->di.dumper = dp->d_dump; 190 gkd->di.priv = dp; 191 gkd->di.blocksize = dp->d_sectorsize; 192 gkd->di.maxiosize = dp->d_maxsize; 193 gkd->di.mediaoffset = gkd->offset; 194 if ((gkd->offset + gkd->length) > dp->d_mediasize) 195 gkd->length = dp->d_mediasize - gkd->offset; 196 gkd->di.mediasize = gkd->length; 197 g_io_deliver(bp, 0); 198} 199 200static void 201g_disk_setstate(struct bio *bp, struct g_disk_softc *sc) 202{ 203 const char *cmd; 204 205 memcpy(&sc->state, bp->bio_data, sizeof(sc->state)); 206 if (sc->led[0] != 0) { 207 switch (sc->state) { 208 case G_STATE_FAILED: 209 cmd = "1"; 210 break; 211 case G_STATE_REBUILD: 212 cmd = "f5"; 213 break; 214 case G_STATE_RESYNC: 215 cmd = "f1"; 216 break; 217 default: 218 cmd = "0"; 219 break; 220 } 221 led_set(sc->led, cmd); 222 } 223 g_io_deliver(bp, 0); 224} 225 226static void 227g_disk_done(struct bio *bp) 228{ 229 struct bintime now; 230 struct bio *bp2; 231 struct g_disk_softc *sc; 232 233 /* See "notes" for why we need a mutex here */ 234 sc = bp->bio_caller1; 235 bp2 = bp->bio_parent; 236 binuptime(&now); 237 mtx_lock(&sc->done_mtx); 238 if (bp2->bio_error == 0) 239 bp2->bio_error = bp->bio_error; 240 bp2->bio_completed += bp->bio_length - bp->bio_resid; 241 242 if (bp->bio_cmd == BIO_READ) 243 kmsan_check(bp2->bio_data, bp2->bio_completed, "g_disk_done"); 244 245 switch (bp->bio_cmd) { 246 case BIO_ZONE: 247 bcopy(&bp->bio_zone, &bp2->bio_zone, sizeof(bp->bio_zone)); 248 /*FALLTHROUGH*/ 249 case BIO_READ: 250 case BIO_WRITE: 251 case BIO_DELETE: 252 case BIO_FLUSH: 253 devstat_end_transaction_bio_bt(sc->d_devstat, bp, &now); 254 break; 255 default: 256 break; 257 } 258 bp2->bio_inbed++; 259 if (bp2->bio_children == bp2->bio_inbed) { 260 mtx_unlock(&sc->done_mtx); 261 bp2->bio_resid = bp2->bio_bcount - bp2->bio_completed; 262 g_io_deliver(bp2, bp2->bio_error); 263 } else 264 mtx_unlock(&sc->done_mtx); 265 g_destroy_bio(bp); 266} 267 268static int 269g_disk_ioctl(struct g_provider *pp, u_long cmd, void * data, int fflag, struct thread *td) 270{ 271 struct disk *dp; 272 struct g_disk_softc *sc; 273 274 sc = pp->private; 275 dp = sc->dp; 276 KASSERT(dp != NULL && !dp->d_destroyed, 277 ("g_disk_ioctl(%lx) on destroyed disk %s", cmd, pp->name)); 278 279 if (dp->d_ioctl == NULL) 280 return (ENOIOCTL); 281 return (dp->d_ioctl(dp, cmd, data, fflag, td)); 282} 283 284static off_t 285g_disk_maxsize(struct disk *dp, struct bio *bp) 286{ 287 if (bp->bio_cmd == BIO_DELETE) 288 return (dp->d_delmaxsize); 289 return (dp->d_maxsize); 290} 291 292static int 293g_disk_maxsegs(struct disk *dp, struct bio *bp) 294{ 295 return ((g_disk_maxsize(dp, bp) / PAGE_SIZE) + 1); 296} 297 298static void 299g_disk_advance(struct disk *dp, struct bio *bp, off_t off) 300{ 301 302 bp->bio_offset += off; 303 bp->bio_length -= off; 304 305 if ((bp->bio_flags & BIO_VLIST) != 0) { 306 bus_dma_segment_t *seg, *end; 307 308 seg = (bus_dma_segment_t *)bp->bio_data; 309 end = (bus_dma_segment_t *)bp->bio_data + bp->bio_ma_n; 310 off += bp->bio_ma_offset; 311 while (off >= seg->ds_len) { 312 KASSERT((seg != end), 313 ("vlist request runs off the end")); 314 off -= seg->ds_len; 315 seg++; 316 } 317 bp->bio_ma_offset = off; 318 bp->bio_ma_n = end - seg; 319 bp->bio_data = (void *)seg; 320 } else if ((bp->bio_flags & BIO_UNMAPPED) != 0) { 321 bp->bio_ma += off / PAGE_SIZE; 322 bp->bio_ma_offset += off; 323 bp->bio_ma_offset %= PAGE_SIZE; 324 bp->bio_ma_n -= off / PAGE_SIZE; 325 } else { 326 bp->bio_data += off; 327 } 328} 329 330static void 331g_disk_seg_limit(bus_dma_segment_t *seg, off_t *poffset, 332 off_t *plength, int *ppages) 333{ 334 uintptr_t seg_page_base; 335 uintptr_t seg_page_end; 336 off_t offset; 337 off_t length; 338 int seg_pages; 339 340 offset = *poffset; 341 length = *plength; 342 343 if (length > seg->ds_len - offset) 344 length = seg->ds_len - offset; 345 346 seg_page_base = trunc_page(seg->ds_addr + offset); 347 seg_page_end = round_page(seg->ds_addr + offset + length); 348 seg_pages = (seg_page_end - seg_page_base) >> PAGE_SHIFT; 349 350 if (seg_pages > *ppages) { 351 seg_pages = *ppages; 352 length = (seg_page_base + (seg_pages << PAGE_SHIFT)) - 353 (seg->ds_addr + offset); 354 } 355 356 *poffset = 0; 357 *plength -= length; 358 *ppages -= seg_pages; 359} 360 361static off_t 362g_disk_vlist_limit(struct disk *dp, struct bio *bp, bus_dma_segment_t **pendseg) 363{ 364 bus_dma_segment_t *seg, *end __diagused; 365 off_t residual; 366 off_t offset; 367 int pages; 368 369 seg = (bus_dma_segment_t *)bp->bio_data; 370 end = (bus_dma_segment_t *)bp->bio_data + bp->bio_ma_n; 371 residual = bp->bio_length; 372 offset = bp->bio_ma_offset; 373 pages = g_disk_maxsegs(dp, bp); 374 while (residual != 0 && pages != 0) { 375 KASSERT((seg != end), 376 ("vlist limit runs off the end")); 377 g_disk_seg_limit(seg, &offset, &residual, &pages); 378 seg++; 379 } 380 if (pendseg != NULL) 381 *pendseg = seg; 382 return (residual); 383} 384 385static bool 386g_disk_limit(struct disk *dp, struct bio *bp) 387{ 388 bool limited = false; 389 off_t maxsz; 390 391 maxsz = g_disk_maxsize(dp, bp); 392 393 /* 394 * XXX: If we have a stripesize we should really use it here. 395 * Care should be taken in the delete case if this is done 396 * as deletes can be very sensitive to size given how they 397 * are processed. 398 */ 399 if (bp->bio_length > maxsz) { 400 bp->bio_length = maxsz; 401 limited = true; 402 } 403 404 if ((bp->bio_flags & BIO_VLIST) != 0) { 405 bus_dma_segment_t *firstseg, *endseg; 406 off_t residual; 407 408 firstseg = (bus_dma_segment_t*)bp->bio_data; 409 residual = g_disk_vlist_limit(dp, bp, &endseg); 410 if (residual != 0) { 411 bp->bio_ma_n = endseg - firstseg; 412 bp->bio_length -= residual; 413 limited = true; 414 } 415 } else if ((bp->bio_flags & BIO_UNMAPPED) != 0) { 416 bp->bio_ma_n = 417 howmany(bp->bio_ma_offset + bp->bio_length, PAGE_SIZE); 418 } 419 420 return (limited); 421} 422 423static void 424g_disk_start(struct bio *bp) 425{ 426 struct bio *bp2, *bp3; 427 struct disk *dp; 428 struct g_disk_softc *sc; 429 int error; 430 off_t off; 431 432 biotrack(bp, __func__); 433 434 sc = bp->bio_to->private; 435 dp = sc->dp; 436 KASSERT(dp != NULL && !dp->d_destroyed, 437 ("g_disk_start(%p) on destroyed disk %s", bp, bp->bio_to->name)); 438 error = EJUSTRETURN; 439 switch(bp->bio_cmd) { 440 case BIO_DELETE: 441 if (!(dp->d_flags & DISKFLAG_CANDELETE)) { 442 error = EOPNOTSUPP; 443 break; 444 } 445 /* fall-through */ 446 case BIO_READ: 447 case BIO_WRITE: 448 KASSERT((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0 || 449 (bp->bio_flags & BIO_UNMAPPED) == 0, 450 ("unmapped bio not supported by disk %s", dp->d_name)); 451 452 if (bp->bio_cmd == BIO_WRITE) 453 kmsan_check_bio(bp, "g_disk_start"); 454 455 off = 0; 456 bp3 = NULL; 457 bp2 = g_clone_bio(bp); 458 if (bp2 == NULL) { 459 error = ENOMEM; 460 break; 461 } 462 for (;;) { 463 if (g_disk_limit(dp, bp2)) { 464 off += bp2->bio_length; 465 466 /* 467 * To avoid a race, we need to grab the next bio 468 * before we schedule this one. See "notes". 469 */ 470 bp3 = g_clone_bio(bp); 471 if (bp3 == NULL) 472 bp->bio_error = ENOMEM; 473 } 474 bp2->bio_done = g_disk_done; 475 bp2->bio_caller1 = sc; 476 bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize; 477 bp2->bio_bcount = bp2->bio_length; 478 bp2->bio_disk = dp; 479 devstat_start_transaction_bio(dp->d_devstat, bp2); 480 dp->d_strategy(bp2); 481 482 if (bp3 == NULL) 483 break; 484 485 bp2 = bp3; 486 bp3 = NULL; 487 g_disk_advance(dp, bp2, off); 488 } 489 break; 490 case BIO_GETATTR: 491 /* Give the driver a chance to override */ 492 if (dp->d_getattr != NULL) { 493 if (bp->bio_disk == NULL) 494 bp->bio_disk = dp; 495 error = dp->d_getattr(bp); 496 if (error != -1) 497 break; 498 error = EJUSTRETURN; 499 } 500 if (g_handleattr_int(bp, "GEOM::candelete", 501 (dp->d_flags & DISKFLAG_CANDELETE) != 0)) 502 break; 503 else if (g_handleattr_int(bp, "GEOM::fwsectors", 504 dp->d_fwsectors)) 505 break; 506 else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads)) 507 break; 508 else if (g_handleattr_str(bp, "GEOM::ident", dp->d_ident)) 509 break; 510 else if (g_handleattr_str(bp, "GEOM::descr", dp->d_descr)) 511 break; 512 else if (g_handleattr_uint16_t(bp, "GEOM::hba_vendor", 513 dp->d_hba_vendor)) 514 break; 515 else if (g_handleattr_uint16_t(bp, "GEOM::hba_device", 516 dp->d_hba_device)) 517 break; 518 else if (g_handleattr_uint16_t(bp, "GEOM::hba_subvendor", 519 dp->d_hba_subvendor)) 520 break; 521 else if (g_handleattr_uint16_t(bp, "GEOM::hba_subdevice", 522 dp->d_hba_subdevice)) 523 break; 524 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump")) 525 g_disk_kerneldump(bp, dp); 526 else if (!strcmp(bp->bio_attribute, "GEOM::setstate")) 527 g_disk_setstate(bp, sc); 528 else if (g_handleattr_uint16_t(bp, "GEOM::rotation_rate", 529 dp->d_rotation_rate)) 530 break; 531 else if (g_handleattr_str(bp, "GEOM::attachment", 532 dp->d_attachment)) 533 break; 534 else 535 error = ENOIOCTL; 536 break; 537 case BIO_FLUSH: 538 g_trace(G_T_BIO, "g_disk_flushcache(%s)", 539 bp->bio_to->name); 540 if (!(dp->d_flags & DISKFLAG_CANFLUSHCACHE)) { 541 error = (sc->flush_notsup_succeed) ? 0 : EOPNOTSUPP; 542 break; 543 } 544 /*FALLTHROUGH*/ 545 case BIO_ZONE: 546 if (bp->bio_cmd == BIO_ZONE) { 547 if (!(dp->d_flags & DISKFLAG_CANZONE)) { 548 error = EOPNOTSUPP; 549 break; 550 } 551 g_trace(G_T_BIO, "g_disk_zone(%s)", 552 bp->bio_to->name); 553 } 554 bp2 = g_clone_bio(bp); 555 if (bp2 == NULL) { 556 g_io_deliver(bp, ENOMEM); 557 return; 558 } 559 bp2->bio_done = g_disk_done; 560 bp2->bio_caller1 = sc; 561 bp2->bio_disk = dp; 562 devstat_start_transaction_bio(dp->d_devstat, bp2); 563 dp->d_strategy(bp2); 564 break; 565 case BIO_SPEEDUP: 566 bp2 = g_clone_bio(bp); 567 if (bp2 == NULL) { 568 g_io_deliver(bp, ENOMEM); 569 return; 570 } 571 bp2->bio_done = g_disk_done; 572 bp2->bio_caller1 = sc; 573 bp2->bio_disk = dp; 574 dp->d_strategy(bp2); 575 break; 576 default: 577 error = EOPNOTSUPP; 578 break; 579 } 580 if (error != EJUSTRETURN) 581 g_io_deliver(bp, error); 582 return; 583} 584 585static void 586g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp) 587{ 588 struct bio *bp; 589 struct disk *dp; 590 struct g_disk_softc *sc; 591 char *buf; 592 int res = 0; 593 594 sc = gp->softc; 595 if (sc == NULL || (dp = sc->dp) == NULL) 596 return; 597 if (indent == NULL) { 598 sbuf_printf(sb, " hd %u", dp->d_fwheads); 599 sbuf_printf(sb, " sc %u", dp->d_fwsectors); 600 return; 601 } 602 if (pp != NULL) { 603 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n", 604 indent, dp->d_fwheads); 605 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n", 606 indent, dp->d_fwsectors); 607 608 /* 609 * "rotationrate" is a little complicated, because the value 610 * returned by the drive might not be the RPM; 0 and 1 are 611 * special cases, and there's also a valid range. 612 */ 613 sbuf_printf(sb, "%s<rotationrate>", indent); 614 if (dp->d_rotation_rate == DISK_RR_UNKNOWN) /* Old drives */ 615 sbuf_cat(sb, "unknown"); /* don't report RPM. */ 616 else if (dp->d_rotation_rate == DISK_RR_NON_ROTATING) 617 sbuf_cat(sb, "0"); 618 else if ((dp->d_rotation_rate >= DISK_RR_MIN) && 619 (dp->d_rotation_rate <= DISK_RR_MAX)) 620 sbuf_printf(sb, "%u", dp->d_rotation_rate); 621 else 622 sbuf_cat(sb, "invalid"); 623 sbuf_cat(sb, "</rotationrate>\n"); 624 if (dp->d_getattr != NULL) { 625 buf = g_malloc(DISK_IDENT_SIZE, M_WAITOK); 626 bp = g_alloc_bio(); 627 bp->bio_disk = dp; 628 bp->bio_attribute = "GEOM::ident"; 629 bp->bio_length = DISK_IDENT_SIZE; 630 bp->bio_data = buf; 631 res = dp->d_getattr(bp); 632 sbuf_printf(sb, "%s<ident>", indent); 633 g_conf_cat_escaped(sb, res == 0 ? buf : dp->d_ident); 634 sbuf_cat(sb, "</ident>\n"); 635 bp->bio_attribute = "GEOM::lunid"; 636 bp->bio_length = DISK_IDENT_SIZE; 637 bp->bio_data = buf; 638 if (dp->d_getattr(bp) == 0) { 639 sbuf_printf(sb, "%s<lunid>", indent); 640 g_conf_cat_escaped(sb, buf); 641 sbuf_cat(sb, "</lunid>\n"); 642 } 643 bp->bio_attribute = "GEOM::lunname"; 644 bp->bio_length = DISK_IDENT_SIZE; 645 bp->bio_data = buf; 646 if (dp->d_getattr(bp) == 0) { 647 sbuf_printf(sb, "%s<lunname>", indent); 648 g_conf_cat_escaped(sb, buf); 649 sbuf_cat(sb, "</lunname>\n"); 650 } 651 g_destroy_bio(bp); 652 g_free(buf); 653 } else { 654 sbuf_printf(sb, "%s<ident>", indent); 655 g_conf_cat_escaped(sb, dp->d_ident); 656 sbuf_cat(sb, "</ident>\n"); 657 } 658 sbuf_printf(sb, "%s<descr>", indent); 659 g_conf_cat_escaped(sb, dp->d_descr); 660 sbuf_cat(sb, "</descr>\n"); 661 } 662} 663 664static void 665g_disk_resize(void *ptr, int flag) 666{ 667 struct disk *dp; 668 struct g_geom *gp; 669 struct g_provider *pp; 670 671 if (flag == EV_CANCEL) 672 return; 673 g_topology_assert(); 674 675 dp = ptr; 676 gp = dp->d_geom; 677 678 if (dp->d_destroyed || gp == NULL) 679 return; 680 681 LIST_FOREACH(pp, &gp->provider, provider) { 682 if (pp->sectorsize != 0 && 683 pp->sectorsize != dp->d_sectorsize) 684 g_wither_provider(pp, ENXIO); 685 else 686 g_resize_provider(pp, dp->d_mediasize); 687 } 688} 689 690static void 691g_disk_create(void *arg, int flag) 692{ 693 struct g_geom *gp; 694 struct g_provider *pp; 695 struct disk *dp; 696 struct g_disk_softc *sc; 697 struct disk_alias *dap; 698 char tmpstr[80]; 699 700 if (flag == EV_CANCEL) 701 return; 702 g_topology_assert(); 703 dp = arg; 704 705 mtx_pool_lock(mtxpool_sleep, dp); 706 dp->d_init_level = DISK_INIT_START; 707 708 /* 709 * If the disk has already gone away, we can just stop here and 710 * call the user's callback to tell him we've cleaned things up. 711 */ 712 if (dp->d_goneflag != 0) { 713 mtx_pool_unlock(mtxpool_sleep, dp); 714 if (dp->d_gone != NULL) 715 dp->d_gone(dp); 716 return; 717 } 718 mtx_pool_unlock(mtxpool_sleep, dp); 719 720 sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO); 721 mtx_init(&sc->done_mtx, "g_disk_done", NULL, MTX_DEF); 722 sc->dp = dp; 723 if (dp->d_devstat == NULL) { 724 dp->d_devstat = devstat_new_entry(dp->d_name, dp->d_unit, 725 dp->d_sectorsize, DEVSTAT_ALL_SUPPORTED, 726 DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX); 727 } 728 sc->d_devstat = dp->d_devstat; 729 gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit); 730 gp->softc = sc; 731 pp = g_new_providerf(gp, "%s", gp->name); 732 LIST_FOREACH(dap, &dp->d_aliases, da_next) 733 g_provider_add_alias(pp, "%s%d", dap->da_alias, dp->d_unit); 734 devstat_remove_entry(pp->stat); 735 pp->stat = NULL; 736 dp->d_devstat->id = pp; 737 pp->mediasize = dp->d_mediasize; 738 pp->sectorsize = dp->d_sectorsize; 739 pp->stripeoffset = dp->d_stripeoffset; 740 pp->stripesize = dp->d_stripesize; 741 if ((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0) 742 pp->flags |= G_PF_ACCEPT_UNMAPPED; 743 if ((dp->d_flags & DISKFLAG_DIRECT_COMPLETION) != 0) 744 pp->flags |= G_PF_DIRECT_SEND; 745 pp->flags |= G_PF_DIRECT_RECEIVE; 746 if (bootverbose) 747 printf("GEOM: new disk %s\n", gp->name); 748 sysctl_ctx_init(&sc->sysctl_ctx); 749 snprintf(tmpstr, sizeof(tmpstr), "GEOM disk %s", gp->name); 750 sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx, 751 SYSCTL_STATIC_CHILDREN(_kern_geom_disk), OID_AUTO, gp->name, 752 CTLFLAG_RD | CTLFLAG_MPSAFE, 0, tmpstr); 753 if (sc->sysctl_tree != NULL) { 754 SYSCTL_ADD_STRING(&sc->sysctl_ctx, 755 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "led", 756 CTLFLAG_RWTUN, sc->led, sizeof(sc->led), 757 "LED name"); 758 SYSCTL_ADD_PROC(&sc->sysctl_ctx, 759 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "flags", 760 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, dp, 0, 761 g_disk_sysctl_flags, "A", "Report disk flags"); 762 SYSCTL_ADD_BOOL(&sc->sysctl_ctx, 763 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "flush_notsup_succeed", 764 CTLFLAG_RWTUN, &sc->flush_notsup_succeed, sizeof(sc->flush_notsup_succeed), 765 "Do not return EOPNOTSUPP if there is no cache to flush"); 766 } 767 pp->private = sc; 768 dp->d_geom = gp; 769 g_error_provider(pp, 0); 770 771 mtx_pool_lock(mtxpool_sleep, dp); 772 dp->d_init_level = DISK_INIT_DONE; 773 774 /* 775 * If the disk has gone away at this stage, start the withering 776 * process for it. 777 */ 778 if (dp->d_goneflag != 0) { 779 mtx_pool_unlock(mtxpool_sleep, dp); 780 g_wither_provider(pp, ENXIO); 781 return; 782 } 783 mtx_pool_unlock(mtxpool_sleep, dp); 784 785} 786 787/* 788 * We get this callback after all of the consumers have gone away, and just 789 * before the provider is freed. If the disk driver provided a d_gone 790 * callback, let them know that it is okay to free resources -- they won't 791 * be getting any more accesses from GEOM. 792 */ 793static void 794g_disk_providergone(struct g_provider *pp) 795{ 796 struct disk *dp; 797 struct g_disk_softc *sc; 798 799 sc = (struct g_disk_softc *)pp->private; 800 dp = sc->dp; 801 if (dp != NULL && dp->d_gone != NULL) 802 dp->d_gone(dp); 803 if (sc->sysctl_tree != NULL) { 804 sysctl_ctx_free(&sc->sysctl_ctx); 805 sc->sysctl_tree = NULL; 806 } 807 if (sc->led[0] != 0) { 808 led_set(sc->led, "0"); 809 sc->led[0] = 0; 810 } 811 pp->private = NULL; 812 pp->geom->softc = NULL; 813 mtx_destroy(&sc->done_mtx); 814 g_free(sc); 815} 816 817static void 818g_disk_destroy(void *ptr, int flag) 819{ 820 struct disk *dp; 821 struct g_geom *gp; 822 struct g_disk_softc *sc; 823 struct disk_alias *dap, *daptmp; 824 825 g_topology_assert(); 826 dp = ptr; 827 gp = dp->d_geom; 828 if (gp != NULL) { 829 sc = gp->softc; 830 if (sc != NULL) 831 sc->dp = NULL; 832 dp->d_geom = NULL; 833 g_wither_geom(gp, ENXIO); 834 } 835 LIST_FOREACH_SAFE(dap, &dp->d_aliases, da_next, daptmp) 836 g_free(dap); 837 838 g_free(dp); 839} 840 841/* 842 * We only allow printable characters in disk ident, 843 * the rest is converted to 'x<HH>'. 844 */ 845static void 846g_disk_ident_adjust(char *ident, size_t size) 847{ 848 char *p, tmp[4], newid[DISK_IDENT_SIZE]; 849 850 newid[0] = '\0'; 851 for (p = ident; *p != '\0'; p++) { 852 if (isprint(*p)) { 853 tmp[0] = *p; 854 tmp[1] = '\0'; 855 } else { 856 snprintf(tmp, sizeof(tmp), "x%02hhx", 857 *(unsigned char *)p); 858 } 859 if (strlcat(newid, tmp, sizeof(newid)) >= sizeof(newid)) 860 break; 861 } 862 bzero(ident, size); 863 strlcpy(ident, newid, size); 864} 865 866struct disk * 867disk_alloc(void) 868{ 869 struct disk *dp; 870 871 dp = g_malloc(sizeof(struct disk), M_WAITOK | M_ZERO); 872 LIST_INIT(&dp->d_aliases); 873 dp->d_init_level = DISK_INIT_NONE; 874 dp->d_cevent = g_alloc_event(M_WAITOK); 875 dp->d_devent = g_alloc_event(M_WAITOK); 876 return (dp); 877} 878 879void 880disk_create(struct disk *dp, int version) 881{ 882 883 if (version != DISK_VERSION) { 884 printf("WARNING: Attempt to add disk %s%d %s", 885 dp->d_name, dp->d_unit, 886 " using incompatible ABI version of disk(9)\n"); 887 printf("WARNING: Ignoring disk %s%d\n", 888 dp->d_name, dp->d_unit); 889 return; 890 } 891 if (dp->d_flags & DISKFLAG_RESERVED) { 892 printf("WARNING: Attempt to add non-MPSAFE disk %s%d\n", 893 dp->d_name, dp->d_unit); 894 printf("WARNING: Ignoring disk %s%d\n", 895 dp->d_name, dp->d_unit); 896 return; 897 } 898 KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy")); 899 KASSERT(dp->d_name != NULL, ("disk_create need d_name")); 900 KASSERT(*dp->d_name != 0, ("disk_create need d_name")); 901 KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long")); 902 g_disk_ident_adjust(dp->d_ident, sizeof(dp->d_ident)); 903 904 dp->d_init_level = DISK_INIT_CREATE; 905 906 KASSERT(dp->d_cevent != NULL, 907 ("Disk create for %p with event NULL", dp)); 908 g_post_event_ep(g_disk_create, dp, dp->d_cevent, dp, NULL); 909} 910 911void 912disk_destroy(struct disk *dp) 913{ 914 struct disk_alias *dap, *daptmp; 915 916 /* If disk_create() was never called, just free the resources. */ 917 if (dp->d_init_level < DISK_INIT_CREATE) { 918 if (dp->d_devstat != NULL) 919 devstat_remove_entry(dp->d_devstat); 920 LIST_FOREACH_SAFE(dap, &dp->d_aliases, da_next, daptmp) 921 g_free(dap); 922 g_free(dp->d_cevent); 923 g_free(dp->d_devent); 924 g_free(dp); 925 return; 926 } 927 928 KASSERT(dp->d_devent != NULL, 929 ("Disk destroy for %p with event NULL", dp)); 930 disk_gone(dp); 931 dp->d_destroyed = 1; 932 g_cancel_event(dp); 933 if (dp->d_devstat != NULL) 934 devstat_remove_entry(dp->d_devstat); 935 g_post_event_ep(g_disk_destroy, dp, dp->d_devent, NULL); 936} 937 938void 939disk_add_alias(struct disk *dp, const char *name) 940{ 941 struct disk_alias *dap; 942 943 dap = (struct disk_alias *)g_malloc( 944 sizeof(struct disk_alias) + strlen(name) + 1, M_WAITOK); 945 strcpy((char *)(dap + 1), name); 946 dap->da_alias = (const char *)(dap + 1); 947 LIST_INSERT_HEAD(&dp->d_aliases, dap, da_next); 948} 949 950void 951disk_gone(struct disk *dp) 952{ 953 struct g_geom *gp; 954 struct g_provider *pp; 955 956 mtx_pool_lock(mtxpool_sleep, dp); 957 958 /* 959 * Second wither call makes no sense, plus we can not access the list 960 * of providers without topology lock after calling wither once. 961 */ 962 if (dp->d_goneflag != 0) { 963 mtx_pool_unlock(mtxpool_sleep, dp); 964 return; 965 } 966 967 dp->d_goneflag = 1; 968 969 /* 970 * If we're still in the process of creating this disk (the 971 * g_disk_create() function is still queued, or is in 972 * progress), the init level will not yet be DISK_INIT_DONE. 973 * 974 * If that is the case, g_disk_create() will see d_goneflag 975 * and take care of cleaning things up. 976 * 977 * If the disk has already been created, we default to 978 * withering the provider as usual below. 979 * 980 * If the caller has not set a d_gone() callback, he will 981 * not be any worse off by returning here, because the geom 982 * has not been fully setup in any case. 983 */ 984 if (dp->d_init_level < DISK_INIT_DONE) { 985 mtx_pool_unlock(mtxpool_sleep, dp); 986 return; 987 } 988 mtx_pool_unlock(mtxpool_sleep, dp); 989 990 gp = dp->d_geom; 991 pp = LIST_FIRST(&gp->provider); 992 if (pp != NULL) { 993 KASSERT(LIST_NEXT(pp, provider) == NULL, 994 ("geom %p has more than one provider", gp)); 995 g_wither_provider(pp, ENXIO); 996 } 997} 998 999void 1000disk_attr_changed(struct disk *dp, const char *attr, int flag) 1001{ 1002 struct g_geom *gp = dp->d_geom; 1003 struct g_provider *pp; 1004 char devnamebuf[128]; 1005 1006 if (gp == NULL) 1007 return; 1008 LIST_FOREACH(pp, &gp->provider, provider) 1009 (void)g_attr_changed(pp, attr, flag); 1010 snprintf(devnamebuf, sizeof(devnamebuf), "devname=%s%d", dp->d_name, 1011 dp->d_unit); 1012 devctl_notify("GEOM", "disk", attr, devnamebuf); 1013} 1014 1015void 1016disk_media_changed(struct disk *dp, int flag) 1017{ 1018 struct g_geom *gp = dp->d_geom; 1019 struct g_provider *pp; 1020 1021 if (gp == NULL) 1022 return; 1023 pp = LIST_FIRST(&gp->provider); 1024 if (pp != NULL) { 1025 KASSERT(LIST_NEXT(pp, provider) == NULL, 1026 ("geom %p has more than one provider", gp)); 1027 g_media_changed(pp, flag); 1028 } 1029} 1030 1031void 1032disk_media_gone(struct disk *dp, int flag) 1033{ 1034 struct g_geom *gp = dp->d_geom; 1035 struct g_provider *pp; 1036 1037 if (gp == NULL) 1038 return; 1039 pp = LIST_FIRST(&gp->provider); 1040 if (pp != NULL) { 1041 KASSERT(LIST_NEXT(pp, provider) == NULL, 1042 ("geom %p has more than one provider", gp)); 1043 g_media_gone(pp, flag); 1044 } 1045} 1046 1047int 1048disk_resize(struct disk *dp, int flag) 1049{ 1050 1051 if (dp->d_destroyed || dp->d_geom == NULL) 1052 return (0); 1053 1054 return (g_post_event(g_disk_resize, dp, flag, NULL)); 1055} 1056 1057static void 1058g_kern_disks(void *p, int flag __unused) 1059{ 1060 struct sbuf *sb; 1061 struct g_geom *gp; 1062 char *sp; 1063 1064 sb = p; 1065 sp = ""; 1066 g_topology_assert(); 1067 LIST_FOREACH(gp, &g_disk_class.geom, geom) { 1068 sbuf_printf(sb, "%s%s", sp, gp->name); 1069 sp = " "; 1070 } 1071 sbuf_finish(sb); 1072} 1073 1074static int 1075g_disk_sysctl_flags(SYSCTL_HANDLER_ARGS) 1076{ 1077 struct disk *dp; 1078 struct sbuf *sb; 1079 int error; 1080 1081 sb = sbuf_new_auto(); 1082 dp = (struct disk *)arg1; 1083 sbuf_printf(sb, "%b", dp->d_flags, 1084 "\20" 1085 "\2OPEN" 1086 "\3CANDELETE" 1087 "\4CANFLUSHCACHE" 1088 "\5UNMAPPEDBIO" 1089 "\6DIRECTCOMPLETION" 1090 "\10CANZONE" 1091 "\11WRITEPROTECT"); 1092 1093 sbuf_finish(sb); 1094 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1); 1095 sbuf_delete(sb); 1096 return (error); 1097} 1098 1099static int 1100sysctl_disks(SYSCTL_HANDLER_ARGS) 1101{ 1102 int error; 1103 struct sbuf *sb; 1104 1105 sb = sbuf_new_auto(); 1106 g_waitfor_event(g_kern_disks, sb, M_WAITOK, NULL); 1107 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1); 1108 sbuf_delete(sb); 1109 return error; 1110} 1111 1112SYSCTL_PROC(_kern, OID_AUTO, disks, 1113 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 1114 sysctl_disks, "A", "names of available disks"); 1115