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