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 __FBSDID("$FreeBSD$"); 40 41 #include "opt_geom.h" 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/kernel.h> 46 #include <sys/sysctl.h> 47 #include <sys/bio.h> 48 #include <sys/ctype.h> 49 #include <sys/devctl.h> 50 #include <sys/fcntl.h> 51 #include <sys/malloc.h> 52 #include <sys/msan.h> 53 #include <sys/sbuf.h> 54 #include <sys/devicestat.h> 55 56 #include <sys/lock.h> 57 #include <sys/mutex.h> 58 #include <geom/geom.h> 59 #include <geom/geom_disk.h> 60 #include <geom/geom_int.h> 61 62 #include <dev/led/led.h> 63 64 #include <machine/bus.h> 65 66 struct g_disk_softc { 67 struct disk *dp; 68 struct devstat *d_devstat; 69 struct sysctl_ctx_list sysctl_ctx; 70 struct sysctl_oid *sysctl_tree; 71 char led[64]; 72 uint32_t state; 73 struct mtx done_mtx; 74 }; 75 76 static g_access_t g_disk_access; 77 static g_start_t g_disk_start; 78 static g_ioctl_t g_disk_ioctl; 79 static g_dumpconf_t g_disk_dumpconf; 80 static g_provgone_t g_disk_providergone; 81 82 static int g_disk_sysctl_flags(SYSCTL_HANDLER_ARGS); 83 84 static struct g_class g_disk_class = { 85 .name = G_DISK_CLASS_NAME, 86 .version = G_VERSION, 87 .start = g_disk_start, 88 .access = g_disk_access, 89 .ioctl = g_disk_ioctl, 90 .providergone = g_disk_providergone, 91 .dumpconf = g_disk_dumpconf, 92 }; 93 94 SYSCTL_DECL(_kern_geom); 95 static SYSCTL_NODE(_kern_geom, OID_AUTO, disk, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 96 "GEOM_DISK stuff"); 97 98 DECLARE_GEOM_CLASS(g_disk_class, g_disk); 99 100 static int 101 g_disk_access(struct g_provider *pp, int r, int w, int e) 102 { 103 struct disk *dp; 104 struct g_disk_softc *sc; 105 int error; 106 107 g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)", 108 pp->name, r, w, e); 109 g_topology_assert(); 110 sc = pp->private; 111 if ((dp = sc->dp) == NULL || dp->d_destroyed) { 112 /* 113 * Allow decreasing access count even if disk is not 114 * available anymore. 115 */ 116 if (r <= 0 && w <= 0 && e <= 0) 117 return (0); 118 return (ENXIO); 119 } 120 r += pp->acr; 121 w += pp->acw; 122 e += pp->ace; 123 error = 0; 124 if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) { 125 /* 126 * It would be better to defer this decision to d_open if 127 * it was able to take flags. 128 */ 129 if (w > 0 && (dp->d_flags & DISKFLAG_WRITE_PROTECT) != 0) 130 error = EROFS; 131 if (error == 0 && dp->d_open != NULL) 132 error = dp->d_open(dp); 133 if (bootverbose && error != 0) 134 printf("Opened disk %s -> %d\n", pp->name, error); 135 if (error != 0) 136 return (error); 137 pp->sectorsize = dp->d_sectorsize; 138 if (dp->d_maxsize == 0) { 139 printf("WARNING: Disk drive %s%d has no d_maxsize\n", 140 dp->d_name, dp->d_unit); 141 dp->d_maxsize = DFLTPHYS; 142 } 143 if (dp->d_delmaxsize == 0) { 144 if (bootverbose && dp->d_flags & DISKFLAG_CANDELETE) { 145 printf("WARNING: Disk drive %s%d has no " 146 "d_delmaxsize\n", dp->d_name, dp->d_unit); 147 } 148 dp->d_delmaxsize = dp->d_maxsize; 149 } 150 pp->stripeoffset = dp->d_stripeoffset; 151 pp->stripesize = dp->d_stripesize; 152 dp->d_flags |= DISKFLAG_OPEN; 153 /* 154 * Do not invoke resize event when initial size was zero. 155 * Some disks report its size only after first opening. 156 */ 157 if (pp->mediasize == 0) 158 pp->mediasize = dp->d_mediasize; 159 else 160 g_resize_provider(pp, dp->d_mediasize); 161 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) { 162 if (dp->d_close != NULL) { 163 error = dp->d_close(dp); 164 if (error != 0) 165 printf("Closed disk %s -> %d\n", 166 pp->name, error); 167 } 168 sc->state = G_STATE_ACTIVE; 169 if (sc->led[0] != 0) 170 led_set(sc->led, "0"); 171 dp->d_flags &= ~DISKFLAG_OPEN; 172 } 173 return (error); 174 } 175 176 static void 177 g_disk_kerneldump(struct bio *bp, struct disk *dp) 178 { 179 struct g_kerneldump *gkd; 180 struct g_geom *gp; 181 182 gkd = (struct g_kerneldump*)bp->bio_data; 183 gp = bp->bio_to->geom; 184 g_trace(G_T_TOPOLOGY, "g_disk_kerneldump(%s, %jd, %jd)", 185 gp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length); 186 if (dp->d_dump == NULL) { 187 g_io_deliver(bp, ENODEV); 188 return; 189 } 190 gkd->di.dumper = dp->d_dump; 191 gkd->di.priv = dp; 192 gkd->di.blocksize = dp->d_sectorsize; 193 gkd->di.maxiosize = dp->d_maxsize; 194 gkd->di.mediaoffset = gkd->offset; 195 if ((gkd->offset + gkd->length) > dp->d_mediasize) 196 gkd->length = dp->d_mediasize - gkd->offset; 197 gkd->di.mediasize = gkd->length; 198 g_io_deliver(bp, 0); 199 } 200 201 static void 202 g_disk_setstate(struct bio *bp, struct g_disk_softc *sc) 203 { 204 const char *cmd; 205 206 memcpy(&sc->state, bp->bio_data, sizeof(sc->state)); 207 if (sc->led[0] != 0) { 208 switch (sc->state) { 209 case G_STATE_FAILED: 210 cmd = "1"; 211 break; 212 case G_STATE_REBUILD: 213 cmd = "f5"; 214 break; 215 case G_STATE_RESYNC: 216 cmd = "f1"; 217 break; 218 default: 219 cmd = "0"; 220 break; 221 } 222 led_set(sc->led, cmd); 223 } 224 g_io_deliver(bp, 0); 225 } 226 227 static void 228 g_disk_done(struct bio *bp) 229 { 230 struct bintime now; 231 struct bio *bp2; 232 struct g_disk_softc *sc; 233 234 /* See "notes" for why we need a mutex here */ 235 sc = bp->bio_caller1; 236 bp2 = bp->bio_parent; 237 binuptime(&now); 238 mtx_lock(&sc->done_mtx); 239 if (bp2->bio_error == 0) 240 bp2->bio_error = bp->bio_error; 241 bp2->bio_completed += bp->bio_length - bp->bio_resid; 242 243 if (bp->bio_cmd == BIO_READ) 244 kmsan_check(bp2->bio_data, bp2->bio_completed, "g_disk_done"); 245 246 switch (bp->bio_cmd) { 247 case BIO_ZONE: 248 bcopy(&bp->bio_zone, &bp2->bio_zone, sizeof(bp->bio_zone)); 249 /*FALLTHROUGH*/ 250 case BIO_READ: 251 case BIO_WRITE: 252 case BIO_DELETE: 253 case BIO_FLUSH: 254 devstat_end_transaction_bio_bt(sc->d_devstat, bp, &now); 255 break; 256 default: 257 break; 258 } 259 bp2->bio_inbed++; 260 if (bp2->bio_children == bp2->bio_inbed) { 261 mtx_unlock(&sc->done_mtx); 262 bp2->bio_resid = bp2->bio_bcount - bp2->bio_completed; 263 g_io_deliver(bp2, bp2->bio_error); 264 } else 265 mtx_unlock(&sc->done_mtx); 266 g_destroy_bio(bp); 267 } 268 269 static int 270 g_disk_ioctl(struct g_provider *pp, u_long cmd, void * data, int fflag, struct thread *td) 271 { 272 struct disk *dp; 273 struct g_disk_softc *sc; 274 275 sc = pp->private; 276 dp = sc->dp; 277 KASSERT(dp != NULL && !dp->d_destroyed, 278 ("g_disk_ioctl(%lx) on destroyed disk %s", cmd, pp->name)); 279 280 if (dp->d_ioctl == NULL) 281 return (ENOIOCTL); 282 return (dp->d_ioctl(dp, cmd, data, fflag, td)); 283 } 284 285 static off_t 286 g_disk_maxsize(struct disk *dp, struct bio *bp) 287 { 288 if (bp->bio_cmd == BIO_DELETE) 289 return (dp->d_delmaxsize); 290 return (dp->d_maxsize); 291 } 292 293 static int 294 g_disk_maxsegs(struct disk *dp, struct bio *bp) 295 { 296 return ((g_disk_maxsize(dp, bp) / PAGE_SIZE) + 1); 297 } 298 299 static void 300 g_disk_advance(struct disk *dp, struct bio *bp, off_t off) 301 { 302 303 bp->bio_offset += off; 304 bp->bio_length -= off; 305 306 if ((bp->bio_flags & BIO_VLIST) != 0) { 307 bus_dma_segment_t *seg, *end; 308 309 seg = (bus_dma_segment_t *)bp->bio_data; 310 end = (bus_dma_segment_t *)bp->bio_data + bp->bio_ma_n; 311 off += bp->bio_ma_offset; 312 while (off >= seg->ds_len) { 313 KASSERT((seg != end), 314 ("vlist request runs off the end")); 315 off -= seg->ds_len; 316 seg++; 317 } 318 bp->bio_ma_offset = off; 319 bp->bio_ma_n = end - seg; 320 bp->bio_data = (void *)seg; 321 } else if ((bp->bio_flags & BIO_UNMAPPED) != 0) { 322 bp->bio_ma += off / PAGE_SIZE; 323 bp->bio_ma_offset += off; 324 bp->bio_ma_offset %= PAGE_SIZE; 325 bp->bio_ma_n -= off / PAGE_SIZE; 326 } else { 327 bp->bio_data += off; 328 } 329 } 330 331 static void 332 g_disk_seg_limit(bus_dma_segment_t *seg, off_t *poffset, 333 off_t *plength, int *ppages) 334 { 335 uintptr_t seg_page_base; 336 uintptr_t seg_page_end; 337 off_t offset; 338 off_t length; 339 int seg_pages; 340 341 offset = *poffset; 342 length = *plength; 343 344 if (length > seg->ds_len - offset) 345 length = seg->ds_len - offset; 346 347 seg_page_base = trunc_page(seg->ds_addr + offset); 348 seg_page_end = round_page(seg->ds_addr + offset + length); 349 seg_pages = (seg_page_end - seg_page_base) >> PAGE_SHIFT; 350 351 if (seg_pages > *ppages) { 352 seg_pages = *ppages; 353 length = (seg_page_base + (seg_pages << PAGE_SHIFT)) - 354 (seg->ds_addr + offset); 355 } 356 357 *poffset = 0; 358 *plength -= length; 359 *ppages -= seg_pages; 360 } 361 362 static off_t 363 g_disk_vlist_limit(struct disk *dp, struct bio *bp, bus_dma_segment_t **pendseg) 364 { 365 bus_dma_segment_t *seg, *end __diagused; 366 off_t residual; 367 off_t offset; 368 int pages; 369 370 seg = (bus_dma_segment_t *)bp->bio_data; 371 end = (bus_dma_segment_t *)bp->bio_data + bp->bio_ma_n; 372 residual = bp->bio_length; 373 offset = bp->bio_ma_offset; 374 pages = g_disk_maxsegs(dp, bp); 375 while (residual != 0 && pages != 0) { 376 KASSERT((seg != end), 377 ("vlist limit runs off the end")); 378 g_disk_seg_limit(seg, &offset, &residual, &pages); 379 seg++; 380 } 381 if (pendseg != NULL) 382 *pendseg = seg; 383 return (residual); 384 } 385 386 static bool 387 g_disk_limit(struct disk *dp, struct bio *bp) 388 { 389 bool limited = false; 390 off_t maxsz; 391 392 maxsz = g_disk_maxsize(dp, bp); 393 394 /* 395 * XXX: If we have a stripesize we should really use it here. 396 * Care should be taken in the delete case if this is done 397 * as deletes can be very sensitive to size given how they 398 * are processed. 399 */ 400 if (bp->bio_length > maxsz) { 401 bp->bio_length = maxsz; 402 limited = true; 403 } 404 405 if ((bp->bio_flags & BIO_VLIST) != 0) { 406 bus_dma_segment_t *firstseg, *endseg; 407 off_t residual; 408 409 firstseg = (bus_dma_segment_t*)bp->bio_data; 410 residual = g_disk_vlist_limit(dp, bp, &endseg); 411 if (residual != 0) { 412 bp->bio_ma_n = endseg - firstseg; 413 bp->bio_length -= residual; 414 limited = true; 415 } 416 } else if ((bp->bio_flags & BIO_UNMAPPED) != 0) { 417 bp->bio_ma_n = 418 howmany(bp->bio_ma_offset + bp->bio_length, PAGE_SIZE); 419 } 420 421 return (limited); 422 } 423 424 static void 425 g_disk_start(struct bio *bp) 426 { 427 struct bio *bp2, *bp3; 428 struct disk *dp; 429 struct g_disk_softc *sc; 430 int error; 431 off_t off; 432 433 biotrack(bp, __func__); 434 435 sc = bp->bio_to->private; 436 dp = sc->dp; 437 KASSERT(dp != NULL && !dp->d_destroyed, 438 ("g_disk_start(%p) on destroyed disk %s", bp, bp->bio_to->name)); 439 error = EJUSTRETURN; 440 switch(bp->bio_cmd) { 441 case BIO_DELETE: 442 if (!(dp->d_flags & DISKFLAG_CANDELETE)) { 443 error = EOPNOTSUPP; 444 break; 445 } 446 /* fall-through */ 447 case BIO_READ: 448 case BIO_WRITE: 449 KASSERT((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0 || 450 (bp->bio_flags & BIO_UNMAPPED) == 0, 451 ("unmapped bio not supported by disk %s", dp->d_name)); 452 453 if (bp->bio_cmd == BIO_WRITE) 454 kmsan_check_bio(bp, "g_disk_start"); 455 456 off = 0; 457 bp3 = NULL; 458 bp2 = g_clone_bio(bp); 459 if (bp2 == NULL) { 460 error = ENOMEM; 461 break; 462 } 463 for (;;) { 464 if (g_disk_limit(dp, bp2)) { 465 off += bp2->bio_length; 466 467 /* 468 * To avoid a race, we need to grab the next bio 469 * before we schedule this one. See "notes". 470 */ 471 bp3 = g_clone_bio(bp); 472 if (bp3 == NULL) 473 bp->bio_error = ENOMEM; 474 } 475 bp2->bio_done = g_disk_done; 476 bp2->bio_caller1 = sc; 477 bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize; 478 bp2->bio_bcount = bp2->bio_length; 479 bp2->bio_disk = dp; 480 devstat_start_transaction_bio(dp->d_devstat, bp2); 481 dp->d_strategy(bp2); 482 483 if (bp3 == NULL) 484 break; 485 486 bp2 = bp3; 487 bp3 = NULL; 488 g_disk_advance(dp, bp2, off); 489 } 490 break; 491 case BIO_GETATTR: 492 /* Give the driver a chance to override */ 493 if (dp->d_getattr != NULL) { 494 if (bp->bio_disk == NULL) 495 bp->bio_disk = dp; 496 error = dp->d_getattr(bp); 497 if (error != -1) 498 break; 499 error = EJUSTRETURN; 500 } 501 if (g_handleattr_int(bp, "GEOM::candelete", 502 (dp->d_flags & DISKFLAG_CANDELETE) != 0)) 503 break; 504 else if (g_handleattr_int(bp, "GEOM::fwsectors", 505 dp->d_fwsectors)) 506 break; 507 else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads)) 508 break; 509 else if (g_handleattr_str(bp, "GEOM::ident", dp->d_ident)) 510 break; 511 else if (g_handleattr_str(bp, "GEOM::descr", dp->d_descr)) 512 break; 513 else if (g_handleattr_uint16_t(bp, "GEOM::hba_vendor", 514 dp->d_hba_vendor)) 515 break; 516 else if (g_handleattr_uint16_t(bp, "GEOM::hba_device", 517 dp->d_hba_device)) 518 break; 519 else if (g_handleattr_uint16_t(bp, "GEOM::hba_subvendor", 520 dp->d_hba_subvendor)) 521 break; 522 else if (g_handleattr_uint16_t(bp, "GEOM::hba_subdevice", 523 dp->d_hba_subdevice)) 524 break; 525 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump")) 526 g_disk_kerneldump(bp, dp); 527 else if (!strcmp(bp->bio_attribute, "GEOM::setstate")) 528 g_disk_setstate(bp, sc); 529 else if (g_handleattr_uint16_t(bp, "GEOM::rotation_rate", 530 dp->d_rotation_rate)) 531 break; 532 else if (g_handleattr_str(bp, "GEOM::attachment", 533 dp->d_attachment)) 534 break; 535 else 536 error = ENOIOCTL; 537 break; 538 case BIO_FLUSH: 539 g_trace(G_T_BIO, "g_disk_flushcache(%s)", 540 bp->bio_to->name); 541 if (!(dp->d_flags & DISKFLAG_CANFLUSHCACHE)) { 542 error = EOPNOTSUPP; 543 break; 544 } 545 /*FALLTHROUGH*/ 546 case BIO_ZONE: 547 if (bp->bio_cmd == BIO_ZONE) { 548 if (!(dp->d_flags & DISKFLAG_CANZONE)) { 549 error = EOPNOTSUPP; 550 break; 551 } 552 g_trace(G_T_BIO, "g_disk_zone(%s)", 553 bp->bio_to->name); 554 } 555 bp2 = g_clone_bio(bp); 556 if (bp2 == NULL) { 557 g_io_deliver(bp, ENOMEM); 558 return; 559 } 560 bp2->bio_done = g_disk_done; 561 bp2->bio_caller1 = sc; 562 bp2->bio_disk = dp; 563 devstat_start_transaction_bio(dp->d_devstat, bp2); 564 dp->d_strategy(bp2); 565 break; 566 case BIO_SPEEDUP: 567 bp2 = g_clone_bio(bp); 568 if (bp2 == NULL) { 569 g_io_deliver(bp, ENOMEM); 570 return; 571 } 572 bp2->bio_done = g_disk_done; 573 bp2->bio_caller1 = sc; 574 bp2->bio_disk = dp; 575 dp->d_strategy(bp2); 576 break; 577 default: 578 error = EOPNOTSUPP; 579 break; 580 } 581 if (error != EJUSTRETURN) 582 g_io_deliver(bp, error); 583 return; 584 } 585 586 static void 587 g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp) 588 { 589 struct bio *bp; 590 struct disk *dp; 591 struct g_disk_softc *sc; 592 char *buf; 593 int res = 0; 594 595 sc = gp->softc; 596 if (sc == NULL || (dp = sc->dp) == NULL) 597 return; 598 if (indent == NULL) { 599 sbuf_printf(sb, " hd %u", dp->d_fwheads); 600 sbuf_printf(sb, " sc %u", dp->d_fwsectors); 601 return; 602 } 603 if (pp != NULL) { 604 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n", 605 indent, dp->d_fwheads); 606 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n", 607 indent, dp->d_fwsectors); 608 609 /* 610 * "rotationrate" is a little complicated, because the value 611 * returned by the drive might not be the RPM; 0 and 1 are 612 * special cases, and there's also a valid range. 613 */ 614 sbuf_printf(sb, "%s<rotationrate>", indent); 615 if (dp->d_rotation_rate == DISK_RR_UNKNOWN) /* Old drives */ 616 sbuf_cat(sb, "unknown"); /* don't report RPM. */ 617 else if (dp->d_rotation_rate == DISK_RR_NON_ROTATING) 618 sbuf_cat(sb, "0"); 619 else if ((dp->d_rotation_rate >= DISK_RR_MIN) && 620 (dp->d_rotation_rate <= DISK_RR_MAX)) 621 sbuf_printf(sb, "%u", dp->d_rotation_rate); 622 else 623 sbuf_cat(sb, "invalid"); 624 sbuf_cat(sb, "</rotationrate>\n"); 625 if (dp->d_getattr != NULL) { 626 buf = g_malloc(DISK_IDENT_SIZE, M_WAITOK); 627 bp = g_alloc_bio(); 628 bp->bio_disk = dp; 629 bp->bio_attribute = "GEOM::ident"; 630 bp->bio_length = DISK_IDENT_SIZE; 631 bp->bio_data = buf; 632 res = dp->d_getattr(bp); 633 sbuf_printf(sb, "%s<ident>", indent); 634 g_conf_cat_escaped(sb, res == 0 ? buf : dp->d_ident); 635 sbuf_cat(sb, "</ident>\n"); 636 bp->bio_attribute = "GEOM::lunid"; 637 bp->bio_length = DISK_IDENT_SIZE; 638 bp->bio_data = buf; 639 if (dp->d_getattr(bp) == 0) { 640 sbuf_printf(sb, "%s<lunid>", indent); 641 g_conf_cat_escaped(sb, buf); 642 sbuf_cat(sb, "</lunid>\n"); 643 } 644 bp->bio_attribute = "GEOM::lunname"; 645 bp->bio_length = DISK_IDENT_SIZE; 646 bp->bio_data = buf; 647 if (dp->d_getattr(bp) == 0) { 648 sbuf_printf(sb, "%s<lunname>", indent); 649 g_conf_cat_escaped(sb, buf); 650 sbuf_cat(sb, "</lunname>\n"); 651 } 652 g_destroy_bio(bp); 653 g_free(buf); 654 } else { 655 sbuf_printf(sb, "%s<ident>", indent); 656 g_conf_cat_escaped(sb, dp->d_ident); 657 sbuf_cat(sb, "</ident>\n"); 658 } 659 sbuf_printf(sb, "%s<descr>", indent); 660 g_conf_cat_escaped(sb, dp->d_descr); 661 sbuf_cat(sb, "</descr>\n"); 662 } 663 } 664 665 static void 666 g_disk_resize(void *ptr, int flag) 667 { 668 struct disk *dp; 669 struct g_geom *gp; 670 struct g_provider *pp; 671 672 if (flag == EV_CANCEL) 673 return; 674 g_topology_assert(); 675 676 dp = ptr; 677 gp = dp->d_geom; 678 679 if (dp->d_destroyed || gp == NULL) 680 return; 681 682 LIST_FOREACH(pp, &gp->provider, provider) { 683 if (pp->sectorsize != 0 && 684 pp->sectorsize != dp->d_sectorsize) 685 g_wither_provider(pp, ENXIO); 686 else 687 g_resize_provider(pp, dp->d_mediasize); 688 } 689 } 690 691 static void 692 g_disk_create(void *arg, int flag) 693 { 694 struct g_geom *gp; 695 struct g_provider *pp; 696 struct disk *dp; 697 struct g_disk_softc *sc; 698 struct disk_alias *dap; 699 char tmpstr[80]; 700 701 if (flag == EV_CANCEL) 702 return; 703 g_topology_assert(); 704 dp = arg; 705 706 mtx_pool_lock(mtxpool_sleep, dp); 707 dp->d_init_level = DISK_INIT_START; 708 709 /* 710 * If the disk has already gone away, we can just stop here and 711 * call the user's callback to tell him we've cleaned things up. 712 */ 713 if (dp->d_goneflag != 0) { 714 mtx_pool_unlock(mtxpool_sleep, dp); 715 if (dp->d_gone != NULL) 716 dp->d_gone(dp); 717 return; 718 } 719 mtx_pool_unlock(mtxpool_sleep, dp); 720 721 sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO); 722 mtx_init(&sc->done_mtx, "g_disk_done", NULL, MTX_DEF); 723 sc->dp = dp; 724 sc->d_devstat = dp->d_devstat; 725 gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit); 726 gp->softc = sc; 727 pp = g_new_providerf(gp, "%s", gp->name); 728 LIST_FOREACH(dap, &dp->d_aliases, da_next) 729 g_provider_add_alias(pp, "%s%d", dap->da_alias, dp->d_unit); 730 devstat_remove_entry(pp->stat); 731 pp->stat = NULL; 732 dp->d_devstat->id = pp; 733 pp->mediasize = dp->d_mediasize; 734 pp->sectorsize = dp->d_sectorsize; 735 pp->stripeoffset = dp->d_stripeoffset; 736 pp->stripesize = dp->d_stripesize; 737 if ((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0) 738 pp->flags |= G_PF_ACCEPT_UNMAPPED; 739 if ((dp->d_flags & DISKFLAG_DIRECT_COMPLETION) != 0) 740 pp->flags |= G_PF_DIRECT_SEND; 741 pp->flags |= G_PF_DIRECT_RECEIVE; 742 if (bootverbose) 743 printf("GEOM: new disk %s\n", gp->name); 744 sysctl_ctx_init(&sc->sysctl_ctx); 745 snprintf(tmpstr, sizeof(tmpstr), "GEOM disk %s", gp->name); 746 sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx, 747 SYSCTL_STATIC_CHILDREN(_kern_geom_disk), OID_AUTO, gp->name, 748 CTLFLAG_RD | CTLFLAG_MPSAFE, 0, tmpstr); 749 if (sc->sysctl_tree != NULL) { 750 SYSCTL_ADD_STRING(&sc->sysctl_ctx, 751 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "led", 752 CTLFLAG_RWTUN, sc->led, sizeof(sc->led), 753 "LED name"); 754 SYSCTL_ADD_PROC(&sc->sysctl_ctx, 755 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "flags", 756 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, dp, 0, 757 g_disk_sysctl_flags, "A", "Report disk flags"); 758 } 759 pp->private = sc; 760 dp->d_geom = gp; 761 g_error_provider(pp, 0); 762 763 mtx_pool_lock(mtxpool_sleep, dp); 764 dp->d_init_level = DISK_INIT_DONE; 765 766 /* 767 * If the disk has gone away at this stage, start the withering 768 * process for it. 769 */ 770 if (dp->d_goneflag != 0) { 771 mtx_pool_unlock(mtxpool_sleep, dp); 772 g_wither_provider(pp, ENXIO); 773 return; 774 } 775 mtx_pool_unlock(mtxpool_sleep, dp); 776 777 } 778 779 /* 780 * We get this callback after all of the consumers have gone away, and just 781 * before the provider is freed. If the disk driver provided a d_gone 782 * callback, let them know that it is okay to free resources -- they won't 783 * be getting any more accesses from GEOM. 784 */ 785 static void 786 g_disk_providergone(struct g_provider *pp) 787 { 788 struct disk *dp; 789 struct g_disk_softc *sc; 790 791 sc = (struct g_disk_softc *)pp->private; 792 dp = sc->dp; 793 if (dp != NULL && dp->d_gone != NULL) 794 dp->d_gone(dp); 795 if (sc->sysctl_tree != NULL) { 796 sysctl_ctx_free(&sc->sysctl_ctx); 797 sc->sysctl_tree = NULL; 798 } 799 if (sc->led[0] != 0) { 800 led_set(sc->led, "0"); 801 sc->led[0] = 0; 802 } 803 pp->private = NULL; 804 pp->geom->softc = NULL; 805 mtx_destroy(&sc->done_mtx); 806 g_free(sc); 807 } 808 809 static void 810 g_disk_destroy(void *ptr, int flag) 811 { 812 struct disk *dp; 813 struct g_geom *gp; 814 struct g_disk_softc *sc; 815 struct disk_alias *dap, *daptmp; 816 817 g_topology_assert(); 818 dp = ptr; 819 gp = dp->d_geom; 820 if (gp != NULL) { 821 sc = gp->softc; 822 if (sc != NULL) 823 sc->dp = NULL; 824 dp->d_geom = NULL; 825 g_wither_geom(gp, ENXIO); 826 } 827 LIST_FOREACH_SAFE(dap, &dp->d_aliases, da_next, daptmp) 828 g_free(dap); 829 830 g_free(dp); 831 } 832 833 /* 834 * We only allow printable characters in disk ident, 835 * the rest is converted to 'x<HH>'. 836 */ 837 static void 838 g_disk_ident_adjust(char *ident, size_t size) 839 { 840 char *p, tmp[4], newid[DISK_IDENT_SIZE]; 841 842 newid[0] = '\0'; 843 for (p = ident; *p != '\0'; p++) { 844 if (isprint(*p)) { 845 tmp[0] = *p; 846 tmp[1] = '\0'; 847 } else { 848 snprintf(tmp, sizeof(tmp), "x%02hhx", 849 *(unsigned char *)p); 850 } 851 if (strlcat(newid, tmp, sizeof(newid)) >= sizeof(newid)) 852 break; 853 } 854 bzero(ident, size); 855 strlcpy(ident, newid, size); 856 } 857 858 struct disk * 859 disk_alloc(void) 860 { 861 struct disk *dp; 862 863 dp = g_malloc(sizeof(struct disk), M_WAITOK | M_ZERO); 864 LIST_INIT(&dp->d_aliases); 865 return (dp); 866 } 867 868 void 869 disk_create(struct disk *dp, int version) 870 { 871 872 if (version != DISK_VERSION) { 873 printf("WARNING: Attempt to add disk %s%d %s", 874 dp->d_name, dp->d_unit, 875 " using incompatible ABI version of disk(9)\n"); 876 printf("WARNING: Ignoring disk %s%d\n", 877 dp->d_name, dp->d_unit); 878 return; 879 } 880 if (dp->d_flags & DISKFLAG_RESERVED) { 881 printf("WARNING: Attempt to add non-MPSAFE disk %s%d\n", 882 dp->d_name, dp->d_unit); 883 printf("WARNING: Ignoring disk %s%d\n", 884 dp->d_name, dp->d_unit); 885 return; 886 } 887 KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy")); 888 KASSERT(dp->d_name != NULL, ("disk_create need d_name")); 889 KASSERT(*dp->d_name != 0, ("disk_create need d_name")); 890 KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long")); 891 if (dp->d_devstat == NULL) 892 dp->d_devstat = devstat_new_entry(dp->d_name, dp->d_unit, 893 dp->d_sectorsize, DEVSTAT_ALL_SUPPORTED, 894 DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX); 895 dp->d_geom = NULL; 896 dp->d_event = g_alloc_event(M_WAITOK); 897 898 dp->d_init_level = DISK_INIT_NONE; 899 900 g_disk_ident_adjust(dp->d_ident, sizeof(dp->d_ident)); 901 g_post_event(g_disk_create, dp, M_WAITOK, dp, NULL); 902 } 903 904 void 905 disk_destroy(struct disk *dp) 906 { 907 908 KASSERT(dp->d_event != NULL, 909 ("Disk destroy for %p with event NULL", dp)); 910 disk_gone(dp); 911 dp->d_destroyed = 1; 912 g_cancel_event(dp); 913 if (dp->d_devstat != NULL) 914 devstat_remove_entry(dp->d_devstat); 915 g_post_event_ep(g_disk_destroy, dp, dp->d_event, NULL); 916 } 917 918 void 919 disk_add_alias(struct disk *dp, const char *name) 920 { 921 struct disk_alias *dap; 922 923 dap = (struct disk_alias *)g_malloc( 924 sizeof(struct disk_alias) + strlen(name) + 1, M_WAITOK); 925 strcpy((char *)(dap + 1), name); 926 dap->da_alias = (const char *)(dap + 1); 927 LIST_INSERT_HEAD(&dp->d_aliases, dap, da_next); 928 } 929 930 void 931 disk_gone(struct disk *dp) 932 { 933 struct g_geom *gp; 934 struct g_provider *pp; 935 936 mtx_pool_lock(mtxpool_sleep, dp); 937 938 /* 939 * Second wither call makes no sense, plus we can not access the list 940 * of providers without topology lock after calling wither once. 941 */ 942 if (dp->d_goneflag != 0) { 943 mtx_pool_unlock(mtxpool_sleep, dp); 944 return; 945 } 946 947 dp->d_goneflag = 1; 948 949 /* 950 * If we're still in the process of creating this disk (the 951 * g_disk_create() function is still queued, or is in 952 * progress), the init level will not yet be DISK_INIT_DONE. 953 * 954 * If that is the case, g_disk_create() will see d_goneflag 955 * and take care of cleaning things up. 956 * 957 * If the disk has already been created, we default to 958 * withering the provider as usual below. 959 * 960 * If the caller has not set a d_gone() callback, he will 961 * not be any worse off by returning here, because the geom 962 * has not been fully setup in any case. 963 */ 964 if (dp->d_init_level < DISK_INIT_DONE) { 965 mtx_pool_unlock(mtxpool_sleep, dp); 966 return; 967 } 968 mtx_pool_unlock(mtxpool_sleep, dp); 969 970 gp = dp->d_geom; 971 pp = LIST_FIRST(&gp->provider); 972 if (pp != NULL) { 973 KASSERT(LIST_NEXT(pp, provider) == NULL, 974 ("geom %p has more than one provider", gp)); 975 g_wither_provider(pp, ENXIO); 976 } 977 } 978 979 void 980 disk_attr_changed(struct disk *dp, const char *attr, int flag) 981 { 982 struct g_geom *gp; 983 struct g_provider *pp; 984 char devnamebuf[128]; 985 986 gp = dp->d_geom; 987 if (gp != NULL) 988 LIST_FOREACH(pp, &gp->provider, provider) 989 (void)g_attr_changed(pp, attr, flag); 990 snprintf(devnamebuf, sizeof(devnamebuf), "devname=%s%d", dp->d_name, 991 dp->d_unit); 992 devctl_notify("GEOM", "disk", attr, devnamebuf); 993 } 994 995 void 996 disk_media_changed(struct disk *dp, int flag) 997 { 998 struct g_geom *gp; 999 struct g_provider *pp; 1000 1001 gp = dp->d_geom; 1002 if (gp != NULL) { 1003 pp = LIST_FIRST(&gp->provider); 1004 if (pp != NULL) { 1005 KASSERT(LIST_NEXT(pp, provider) == NULL, 1006 ("geom %p has more than one provider", gp)); 1007 g_media_changed(pp, flag); 1008 } 1009 } 1010 } 1011 1012 void 1013 disk_media_gone(struct disk *dp, int flag) 1014 { 1015 struct g_geom *gp; 1016 struct g_provider *pp; 1017 1018 gp = dp->d_geom; 1019 if (gp != NULL) { 1020 pp = LIST_FIRST(&gp->provider); 1021 if (pp != NULL) { 1022 KASSERT(LIST_NEXT(pp, provider) == NULL, 1023 ("geom %p has more than one provider", gp)); 1024 g_media_gone(pp, flag); 1025 } 1026 } 1027 } 1028 1029 int 1030 disk_resize(struct disk *dp, int flag) 1031 { 1032 1033 if (dp->d_destroyed || dp->d_geom == NULL) 1034 return (0); 1035 1036 return (g_post_event(g_disk_resize, dp, flag, NULL)); 1037 } 1038 1039 static void 1040 g_kern_disks(void *p, int flag __unused) 1041 { 1042 struct sbuf *sb; 1043 struct g_geom *gp; 1044 char *sp; 1045 1046 sb = p; 1047 sp = ""; 1048 g_topology_assert(); 1049 LIST_FOREACH(gp, &g_disk_class.geom, geom) { 1050 sbuf_printf(sb, "%s%s", sp, gp->name); 1051 sp = " "; 1052 } 1053 sbuf_finish(sb); 1054 } 1055 1056 static int 1057 g_disk_sysctl_flags(SYSCTL_HANDLER_ARGS) 1058 { 1059 struct disk *dp; 1060 struct sbuf *sb; 1061 int error; 1062 1063 sb = sbuf_new_auto(); 1064 dp = (struct disk *)arg1; 1065 sbuf_printf(sb, "%b", dp->d_flags, 1066 "\20" 1067 "\2OPEN" 1068 "\3CANDELETE" 1069 "\4CANFLUSHCACHE" 1070 "\5UNMAPPEDBIO" 1071 "\6DIRECTCOMPLETION" 1072 "\10CANZONE" 1073 "\11WRITEPROTECT"); 1074 1075 sbuf_finish(sb); 1076 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1); 1077 sbuf_delete(sb); 1078 return (error); 1079 } 1080 1081 static int 1082 sysctl_disks(SYSCTL_HANDLER_ARGS) 1083 { 1084 int error; 1085 struct sbuf *sb; 1086 1087 sb = sbuf_new_auto(); 1088 g_waitfor_event(g_kern_disks, sb, M_WAITOK, NULL); 1089 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1); 1090 sbuf_delete(sb); 1091 return error; 1092 } 1093 1094 SYSCTL_PROC(_kern, OID_AUTO, disks, 1095 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 1096 sysctl_disks, "A", "names of available disks"); 1097