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 #include <machine/md_var.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 mtx done_mtx; 68 struct disk *dp; 69 struct sysctl_ctx_list sysctl_ctx; 70 struct sysctl_oid *sysctl_tree; 71 char led[64]; 72 uint32_t state; 73 struct mtx start_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, 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 /* XXX: will witness accept a mix of Giant/unGiant drivers here ? */ 236 bp2 = bp->bio_parent; 237 sc = bp2->bio_to->private; 238 bp->bio_completed = bp->bio_length - bp->bio_resid; 239 binuptime(&now); 240 mtx_lock(&sc->done_mtx); 241 if (bp2->bio_error == 0) 242 bp2->bio_error = bp->bio_error; 243 bp2->bio_completed += bp->bio_completed; 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->dp->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 } 267 268 static int 269 g_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 int error; 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 error = dp->d_ioctl(dp, cmd, data, fflag, td); 283 return (error); 284 } 285 286 static off_t 287 g_disk_maxsize(struct disk *dp, struct bio *bp) 288 { 289 if (bp->bio_cmd == BIO_DELETE) 290 return (dp->d_delmaxsize); 291 return (dp->d_maxsize); 292 } 293 294 static int 295 g_disk_maxsegs(struct disk *dp, struct bio *bp) 296 { 297 return ((g_disk_maxsize(dp, bp) / PAGE_SIZE) + 1); 298 } 299 300 static void 301 g_disk_advance(struct disk *dp, struct bio *bp, off_t off) 302 { 303 304 bp->bio_offset += off; 305 bp->bio_length -= off; 306 307 if ((bp->bio_flags & BIO_VLIST) != 0) { 308 bus_dma_segment_t *seg, *end; 309 310 seg = (bus_dma_segment_t *)bp->bio_data; 311 end = (bus_dma_segment_t *)bp->bio_data + bp->bio_ma_n; 312 off += bp->bio_ma_offset; 313 while (off >= seg->ds_len) { 314 KASSERT((seg != end), 315 ("vlist request runs off the end")); 316 off -= seg->ds_len; 317 seg++; 318 } 319 bp->bio_ma_offset = off; 320 bp->bio_ma_n = end - seg; 321 bp->bio_data = (void *)seg; 322 } else if ((bp->bio_flags & BIO_UNMAPPED) != 0) { 323 bp->bio_ma += off / PAGE_SIZE; 324 bp->bio_ma_offset += off; 325 bp->bio_ma_offset %= PAGE_SIZE; 326 bp->bio_ma_n -= off / PAGE_SIZE; 327 } else { 328 bp->bio_data += off; 329 } 330 } 331 332 static void 333 g_disk_seg_limit(bus_dma_segment_t *seg, off_t *poffset, 334 off_t *plength, int *ppages) 335 { 336 uintptr_t seg_page_base; 337 uintptr_t seg_page_end; 338 off_t offset; 339 off_t length; 340 int seg_pages; 341 342 offset = *poffset; 343 length = *plength; 344 345 if (length > seg->ds_len - offset) 346 length = seg->ds_len - offset; 347 348 seg_page_base = trunc_page(seg->ds_addr + offset); 349 seg_page_end = round_page(seg->ds_addr + offset + length); 350 seg_pages = (seg_page_end - seg_page_base) >> PAGE_SHIFT; 351 352 if (seg_pages > *ppages) { 353 seg_pages = *ppages; 354 length = (seg_page_base + (seg_pages << PAGE_SHIFT)) - 355 (seg->ds_addr + offset); 356 } 357 358 *poffset = 0; 359 *plength -= length; 360 *ppages -= seg_pages; 361 } 362 363 static off_t 364 g_disk_vlist_limit(struct disk *dp, struct bio *bp, bus_dma_segment_t **pendseg) 365 { 366 bus_dma_segment_t *seg, *end; 367 off_t residual; 368 off_t offset; 369 int pages; 370 371 seg = (bus_dma_segment_t *)bp->bio_data; 372 end = (bus_dma_segment_t *)bp->bio_data + bp->bio_ma_n; 373 residual = bp->bio_length; 374 offset = bp->bio_ma_offset; 375 pages = g_disk_maxsegs(dp, bp); 376 while (residual != 0 && pages != 0) { 377 KASSERT((seg != end), 378 ("vlist limit runs off the end")); 379 g_disk_seg_limit(seg, &offset, &residual, &pages); 380 seg++; 381 } 382 if (pendseg != NULL) 383 *pendseg = seg; 384 return (residual); 385 } 386 387 static bool 388 g_disk_limit(struct disk *dp, struct bio *bp) 389 { 390 bool limited = false; 391 off_t maxsz; 392 393 maxsz = g_disk_maxsize(dp, bp); 394 395 /* 396 * XXX: If we have a stripesize we should really use it here. 397 * Care should be taken in the delete case if this is done 398 * as deletes can be very sensitive to size given how they 399 * are processed. 400 */ 401 if (bp->bio_length > maxsz) { 402 bp->bio_length = maxsz; 403 limited = true; 404 } 405 406 if ((bp->bio_flags & BIO_VLIST) != 0) { 407 bus_dma_segment_t *firstseg, *endseg; 408 off_t residual; 409 410 firstseg = (bus_dma_segment_t*)bp->bio_data; 411 residual = g_disk_vlist_limit(dp, bp, &endseg); 412 if (residual != 0) { 413 bp->bio_ma_n = endseg - firstseg; 414 bp->bio_length -= residual; 415 limited = true; 416 } 417 } else if ((bp->bio_flags & BIO_UNMAPPED) != 0) { 418 bp->bio_ma_n = 419 howmany(bp->bio_ma_offset + bp->bio_length, PAGE_SIZE); 420 } 421 422 return (limited); 423 } 424 425 static void 426 g_disk_start(struct bio *bp) 427 { 428 struct bio *bp2, *bp3; 429 struct disk *dp; 430 struct g_disk_softc *sc; 431 int error; 432 off_t off; 433 434 biotrack(bp, __func__); 435 436 sc = bp->bio_to->private; 437 dp = sc->dp; 438 KASSERT(dp != NULL && !dp->d_destroyed, 439 ("g_disk_start(%p) on destroyed disk %s", bp, bp->bio_to->name)); 440 error = EJUSTRETURN; 441 switch(bp->bio_cmd) { 442 case BIO_DELETE: 443 if (!(dp->d_flags & DISKFLAG_CANDELETE)) { 444 error = EOPNOTSUPP; 445 break; 446 } 447 /* fall-through */ 448 case BIO_READ: 449 case BIO_WRITE: 450 KASSERT((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0 || 451 (bp->bio_flags & BIO_UNMAPPED) == 0, 452 ("unmapped bio not supported by disk %s", dp->d_name)); 453 off = 0; 454 bp3 = NULL; 455 bp2 = g_clone_bio(bp); 456 if (bp2 == NULL) { 457 error = ENOMEM; 458 break; 459 } 460 for (;;) { 461 if (g_disk_limit(dp, bp2)) { 462 off += bp2->bio_length; 463 464 /* 465 * To avoid a race, we need to grab the next bio 466 * before we schedule this one. See "notes". 467 */ 468 bp3 = g_clone_bio(bp); 469 if (bp3 == NULL) 470 bp->bio_error = ENOMEM; 471 } 472 bp2->bio_done = g_disk_done; 473 bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize; 474 bp2->bio_bcount = bp2->bio_length; 475 bp2->bio_disk = dp; 476 mtx_lock(&sc->start_mtx); 477 devstat_start_transaction_bio(dp->d_devstat, bp2); 478 mtx_unlock(&sc->start_mtx); 479 dp->d_strategy(bp2); 480 481 if (bp3 == NULL) 482 break; 483 484 bp2 = bp3; 485 bp3 = NULL; 486 g_disk_advance(dp, bp2, off); 487 } 488 break; 489 case BIO_GETATTR: 490 /* Give the driver a chance to override */ 491 if (dp->d_getattr != NULL) { 492 if (bp->bio_disk == NULL) 493 bp->bio_disk = dp; 494 error = dp->d_getattr(bp); 495 if (error != -1) 496 break; 497 error = EJUSTRETURN; 498 } 499 if (g_handleattr_int(bp, "GEOM::candelete", 500 (dp->d_flags & DISKFLAG_CANDELETE) != 0)) 501 break; 502 else if (g_handleattr_int(bp, "GEOM::fwsectors", 503 dp->d_fwsectors)) 504 break; 505 else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads)) 506 break; 507 else if (g_handleattr_off_t(bp, "GEOM::frontstuff", 0)) 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_disk = dp; 562 mtx_lock(&sc->start_mtx); 563 devstat_start_transaction_bio(dp->d_devstat, bp2); 564 mtx_unlock(&sc->start_mtx); 565 dp->d_strategy(bp2); 566 break; 567 default: 568 error = EOPNOTSUPP; 569 break; 570 } 571 if (error != EJUSTRETURN) 572 g_io_deliver(bp, error); 573 return; 574 } 575 576 static void 577 g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp) 578 { 579 struct bio *bp; 580 struct disk *dp; 581 struct g_disk_softc *sc; 582 char *buf; 583 int res = 0; 584 585 sc = gp->softc; 586 if (sc == NULL || (dp = sc->dp) == NULL) 587 return; 588 if (indent == NULL) { 589 sbuf_printf(sb, " hd %u", dp->d_fwheads); 590 sbuf_printf(sb, " sc %u", dp->d_fwsectors); 591 return; 592 } 593 if (pp != NULL) { 594 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n", 595 indent, dp->d_fwheads); 596 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n", 597 indent, dp->d_fwsectors); 598 599 /* 600 * "rotationrate" is a little complicated, because the value 601 * returned by the drive might not be the RPM; 0 and 1 are 602 * special cases, and there's also a valid range. 603 */ 604 sbuf_printf(sb, "%s<rotationrate>", indent); 605 if (dp->d_rotation_rate == DISK_RR_UNKNOWN) /* Old drives */ 606 sbuf_cat(sb, "unknown"); /* don't report RPM. */ 607 else if (dp->d_rotation_rate == DISK_RR_NON_ROTATING) 608 sbuf_cat(sb, "0"); 609 else if ((dp->d_rotation_rate >= DISK_RR_MIN) && 610 (dp->d_rotation_rate <= DISK_RR_MAX)) 611 sbuf_printf(sb, "%u", dp->d_rotation_rate); 612 else 613 sbuf_cat(sb, "invalid"); 614 sbuf_cat(sb, "</rotationrate>\n"); 615 if (dp->d_getattr != NULL) { 616 buf = g_malloc(DISK_IDENT_SIZE, M_WAITOK); 617 bp = g_alloc_bio(); 618 bp->bio_disk = dp; 619 bp->bio_attribute = "GEOM::ident"; 620 bp->bio_length = DISK_IDENT_SIZE; 621 bp->bio_data = buf; 622 res = dp->d_getattr(bp); 623 sbuf_printf(sb, "%s<ident>", indent); 624 g_conf_cat_escaped(sb, res == 0 ? buf : dp->d_ident); 625 sbuf_cat(sb, "</ident>\n"); 626 bp->bio_attribute = "GEOM::lunid"; 627 bp->bio_length = DISK_IDENT_SIZE; 628 bp->bio_data = buf; 629 if (dp->d_getattr(bp) == 0) { 630 sbuf_printf(sb, "%s<lunid>", indent); 631 g_conf_cat_escaped(sb, buf); 632 sbuf_cat(sb, "</lunid>\n"); 633 } 634 bp->bio_attribute = "GEOM::lunname"; 635 bp->bio_length = DISK_IDENT_SIZE; 636 bp->bio_data = buf; 637 if (dp->d_getattr(bp) == 0) { 638 sbuf_printf(sb, "%s<lunname>", indent); 639 g_conf_cat_escaped(sb, buf); 640 sbuf_cat(sb, "</lunname>\n"); 641 } 642 g_destroy_bio(bp); 643 g_free(buf); 644 } else { 645 sbuf_printf(sb, "%s<ident>", indent); 646 g_conf_cat_escaped(sb, dp->d_ident); 647 sbuf_cat(sb, "</ident>\n"); 648 } 649 sbuf_printf(sb, "%s<descr>", indent); 650 g_conf_cat_escaped(sb, dp->d_descr); 651 sbuf_cat(sb, "</descr>\n"); 652 } 653 } 654 655 static void 656 g_disk_resize(void *ptr, int flag) 657 { 658 struct disk *dp; 659 struct g_geom *gp; 660 struct g_provider *pp; 661 662 if (flag == EV_CANCEL) 663 return; 664 g_topology_assert(); 665 666 dp = ptr; 667 gp = dp->d_geom; 668 669 if (dp->d_destroyed || gp == NULL) 670 return; 671 672 LIST_FOREACH(pp, &gp->provider, provider) { 673 if (pp->sectorsize != 0 && 674 pp->sectorsize != dp->d_sectorsize) 675 g_wither_provider(pp, ENXIO); 676 else 677 g_resize_provider(pp, dp->d_mediasize); 678 } 679 } 680 681 static void 682 g_disk_create(void *arg, int flag) 683 { 684 struct g_geom *gp; 685 struct g_provider *pp; 686 struct disk *dp; 687 struct g_disk_softc *sc; 688 struct disk_alias *dap; 689 char tmpstr[80]; 690 691 if (flag == EV_CANCEL) 692 return; 693 g_topology_assert(); 694 dp = arg; 695 696 mtx_pool_lock(mtxpool_sleep, dp); 697 dp->d_init_level = DISK_INIT_START; 698 699 /* 700 * If the disk has already gone away, we can just stop here and 701 * call the user's callback to tell him we've cleaned things up. 702 */ 703 if (dp->d_goneflag != 0) { 704 mtx_pool_unlock(mtxpool_sleep, dp); 705 if (dp->d_gone != NULL) 706 dp->d_gone(dp); 707 return; 708 } 709 mtx_pool_unlock(mtxpool_sleep, dp); 710 711 sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO); 712 mtx_init(&sc->start_mtx, "g_disk_start", NULL, MTX_DEF); 713 mtx_init(&sc->done_mtx, "g_disk_done", NULL, MTX_DEF); 714 sc->dp = dp; 715 gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit); 716 gp->softc = sc; 717 LIST_FOREACH(dap, &dp->d_aliases, da_next) { 718 snprintf(tmpstr, sizeof(tmpstr), "%s%d", dap->da_alias, dp->d_unit); 719 g_geom_add_alias(gp, tmpstr); 720 } 721 pp = g_new_providerf(gp, "%s", gp->name); 722 devstat_remove_entry(pp->stat); 723 pp->stat = NULL; 724 dp->d_devstat->id = pp; 725 pp->mediasize = dp->d_mediasize; 726 pp->sectorsize = dp->d_sectorsize; 727 pp->stripeoffset = dp->d_stripeoffset; 728 pp->stripesize = dp->d_stripesize; 729 if ((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0) 730 pp->flags |= G_PF_ACCEPT_UNMAPPED; 731 if ((dp->d_flags & DISKFLAG_DIRECT_COMPLETION) != 0) 732 pp->flags |= G_PF_DIRECT_SEND; 733 pp->flags |= G_PF_DIRECT_RECEIVE; 734 if (bootverbose) 735 printf("GEOM: new disk %s\n", gp->name); 736 sysctl_ctx_init(&sc->sysctl_ctx); 737 snprintf(tmpstr, sizeof(tmpstr), "GEOM disk %s", gp->name); 738 sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx, 739 SYSCTL_STATIC_CHILDREN(_kern_geom_disk), OID_AUTO, gp->name, 740 CTLFLAG_RD, 0, tmpstr); 741 if (sc->sysctl_tree != NULL) { 742 SYSCTL_ADD_STRING(&sc->sysctl_ctx, 743 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "led", 744 CTLFLAG_RWTUN, sc->led, sizeof(sc->led), 745 "LED name"); 746 SYSCTL_ADD_PROC(&sc->sysctl_ctx, 747 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "flags", 748 CTLTYPE_STRING | CTLFLAG_RD, dp, 0, g_disk_sysctl_flags, 749 "A", "Report disk flags"); 750 } 751 pp->private = sc; 752 dp->d_geom = gp; 753 g_error_provider(pp, 0); 754 755 mtx_pool_lock(mtxpool_sleep, dp); 756 dp->d_init_level = DISK_INIT_DONE; 757 758 /* 759 * If the disk has gone away at this stage, start the withering 760 * process for it. 761 */ 762 if (dp->d_goneflag != 0) { 763 mtx_pool_unlock(mtxpool_sleep, dp); 764 g_wither_provider(pp, ENXIO); 765 return; 766 } 767 mtx_pool_unlock(mtxpool_sleep, dp); 768 769 } 770 771 /* 772 * We get this callback after all of the consumers have gone away, and just 773 * before the provider is freed. If the disk driver provided a d_gone 774 * callback, let them know that it is okay to free resources -- they won't 775 * be getting any more accesses from GEOM. 776 */ 777 static void 778 g_disk_providergone(struct g_provider *pp) 779 { 780 struct disk *dp; 781 struct g_disk_softc *sc; 782 783 sc = (struct g_disk_softc *)pp->private; 784 dp = sc->dp; 785 if (dp != NULL && dp->d_gone != NULL) 786 dp->d_gone(dp); 787 if (sc->sysctl_tree != NULL) { 788 sysctl_ctx_free(&sc->sysctl_ctx); 789 sc->sysctl_tree = NULL; 790 } 791 if (sc->led[0] != 0) { 792 led_set(sc->led, "0"); 793 sc->led[0] = 0; 794 } 795 pp->private = NULL; 796 pp->geom->softc = NULL; 797 mtx_destroy(&sc->done_mtx); 798 mtx_destroy(&sc->start_mtx); 799 g_free(sc); 800 } 801 802 static void 803 g_disk_destroy(void *ptr, int flag) 804 { 805 struct disk *dp; 806 struct g_geom *gp; 807 struct g_disk_softc *sc; 808 struct disk_alias *dap, *daptmp; 809 810 g_topology_assert(); 811 dp = ptr; 812 gp = dp->d_geom; 813 if (gp != NULL) { 814 sc = gp->softc; 815 if (sc != NULL) 816 sc->dp = NULL; 817 dp->d_geom = NULL; 818 g_wither_geom(gp, ENXIO); 819 } 820 LIST_FOREACH_SAFE(dap, &dp->d_aliases, da_next, daptmp) 821 g_free(dap); 822 823 g_free(dp); 824 } 825 826 /* 827 * We only allow printable characters in disk ident, 828 * the rest is converted to 'x<HH>'. 829 */ 830 static void 831 g_disk_ident_adjust(char *ident, size_t size) 832 { 833 char *p, tmp[4], newid[DISK_IDENT_SIZE]; 834 835 newid[0] = '\0'; 836 for (p = ident; *p != '\0'; p++) { 837 if (isprint(*p)) { 838 tmp[0] = *p; 839 tmp[1] = '\0'; 840 } else { 841 snprintf(tmp, sizeof(tmp), "x%02hhx", 842 *(unsigned char *)p); 843 } 844 if (strlcat(newid, tmp, sizeof(newid)) >= sizeof(newid)) 845 break; 846 } 847 bzero(ident, size); 848 strlcpy(ident, newid, size); 849 } 850 851 struct disk * 852 disk_alloc(void) 853 { 854 struct disk *dp; 855 856 dp = g_malloc(sizeof(struct disk), M_WAITOK | M_ZERO); 857 LIST_INIT(&dp->d_aliases); 858 return (dp); 859 } 860 861 void 862 disk_create(struct disk *dp, int version) 863 { 864 865 if (version != DISK_VERSION) { 866 printf("WARNING: Attempt to add disk %s%d %s", 867 dp->d_name, dp->d_unit, 868 " using incompatible ABI version of disk(9)\n"); 869 printf("WARNING: Ignoring disk %s%d\n", 870 dp->d_name, dp->d_unit); 871 return; 872 } 873 if (dp->d_flags & DISKFLAG_RESERVED) { 874 printf("WARNING: Attempt to add non-MPSAFE disk %s%d\n", 875 dp->d_name, dp->d_unit); 876 printf("WARNING: Ignoring disk %s%d\n", 877 dp->d_name, dp->d_unit); 878 return; 879 } 880 KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy")); 881 KASSERT(dp->d_name != NULL, ("disk_create need d_name")); 882 KASSERT(*dp->d_name != 0, ("disk_create need d_name")); 883 KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long")); 884 if (dp->d_devstat == NULL) 885 dp->d_devstat = devstat_new_entry(dp->d_name, dp->d_unit, 886 dp->d_sectorsize, DEVSTAT_ALL_SUPPORTED, 887 DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX); 888 dp->d_geom = NULL; 889 890 dp->d_init_level = DISK_INIT_NONE; 891 892 g_disk_ident_adjust(dp->d_ident, sizeof(dp->d_ident)); 893 g_post_event(g_disk_create, dp, M_WAITOK, dp, NULL); 894 } 895 896 void 897 disk_destroy(struct disk *dp) 898 { 899 900 disk_gone(dp); 901 dp->d_destroyed = 1; 902 g_cancel_event(dp); 903 if (dp->d_devstat != NULL) 904 devstat_remove_entry(dp->d_devstat); 905 g_post_event(g_disk_destroy, dp, M_WAITOK, NULL); 906 } 907 908 void 909 disk_add_alias(struct disk *dp, const char *name) 910 { 911 struct disk_alias *dap; 912 913 dap = (struct disk_alias *)g_malloc( 914 sizeof(struct disk_alias) + strlen(name) + 1, M_WAITOK); 915 strcpy((char *)(dap + 1), name); 916 dap->da_alias = (const char *)(dap + 1); 917 LIST_INSERT_HEAD(&dp->d_aliases, dap, da_next); 918 } 919 920 void 921 disk_gone(struct disk *dp) 922 { 923 struct g_geom *gp; 924 struct g_provider *pp; 925 926 mtx_pool_lock(mtxpool_sleep, dp); 927 928 /* 929 * Second wither call makes no sense, plus we can not access the list 930 * of providers without topology lock after calling wither once. 931 */ 932 if (dp->d_goneflag != 0) { 933 mtx_pool_unlock(mtxpool_sleep, dp); 934 return; 935 } 936 937 dp->d_goneflag = 1; 938 939 /* 940 * If we're still in the process of creating this disk (the 941 * g_disk_create() function is still queued, or is in 942 * progress), the init level will not yet be DISK_INIT_DONE. 943 * 944 * If that is the case, g_disk_create() will see d_goneflag 945 * and take care of cleaning things up. 946 * 947 * If the disk has already been created, we default to 948 * withering the provider as usual below. 949 * 950 * If the caller has not set a d_gone() callback, he will 951 * not be any worse off by returning here, because the geom 952 * has not been fully setup in any case. 953 */ 954 if (dp->d_init_level < DISK_INIT_DONE) { 955 mtx_pool_unlock(mtxpool_sleep, dp); 956 return; 957 } 958 mtx_pool_unlock(mtxpool_sleep, dp); 959 960 gp = dp->d_geom; 961 pp = LIST_FIRST(&gp->provider); 962 if (pp != NULL) { 963 KASSERT(LIST_NEXT(pp, provider) == NULL, 964 ("geom %p has more than one provider", gp)); 965 g_wither_provider(pp, ENXIO); 966 } 967 } 968 969 void 970 disk_attr_changed(struct disk *dp, const char *attr, int flag) 971 { 972 struct g_geom *gp; 973 struct g_provider *pp; 974 char devnamebuf[128]; 975 976 gp = dp->d_geom; 977 if (gp != NULL) 978 LIST_FOREACH(pp, &gp->provider, provider) 979 (void)g_attr_changed(pp, attr, flag); 980 snprintf(devnamebuf, sizeof(devnamebuf), "devname=%s%d", dp->d_name, 981 dp->d_unit); 982 devctl_notify("GEOM", "disk", attr, devnamebuf); 983 } 984 985 void 986 disk_media_changed(struct disk *dp, int flag) 987 { 988 struct g_geom *gp; 989 struct g_provider *pp; 990 991 gp = dp->d_geom; 992 if (gp != NULL) { 993 pp = LIST_FIRST(&gp->provider); 994 if (pp != NULL) { 995 KASSERT(LIST_NEXT(pp, provider) == NULL, 996 ("geom %p has more than one provider", gp)); 997 g_media_changed(pp, flag); 998 } 999 } 1000 } 1001 1002 void 1003 disk_media_gone(struct disk *dp, int flag) 1004 { 1005 struct g_geom *gp; 1006 struct g_provider *pp; 1007 1008 gp = dp->d_geom; 1009 if (gp != NULL) { 1010 pp = LIST_FIRST(&gp->provider); 1011 if (pp != NULL) { 1012 KASSERT(LIST_NEXT(pp, provider) == NULL, 1013 ("geom %p has more than one provider", gp)); 1014 g_media_gone(pp, flag); 1015 } 1016 } 1017 } 1018 1019 int 1020 disk_resize(struct disk *dp, int flag) 1021 { 1022 1023 if (dp->d_destroyed || dp->d_geom == NULL) 1024 return (0); 1025 1026 return (g_post_event(g_disk_resize, dp, flag, NULL)); 1027 } 1028 1029 static void 1030 g_kern_disks(void *p, int flag __unused) 1031 { 1032 struct sbuf *sb; 1033 struct g_geom *gp; 1034 char *sp; 1035 1036 sb = p; 1037 sp = ""; 1038 g_topology_assert(); 1039 LIST_FOREACH(gp, &g_disk_class.geom, geom) { 1040 sbuf_printf(sb, "%s%s", sp, gp->name); 1041 sp = " "; 1042 } 1043 sbuf_finish(sb); 1044 } 1045 1046 static int 1047 g_disk_sysctl_flags(SYSCTL_HANDLER_ARGS) 1048 { 1049 struct disk *dp; 1050 struct sbuf *sb; 1051 int error; 1052 1053 sb = sbuf_new_auto(); 1054 dp = (struct disk *)arg1; 1055 sbuf_printf(sb, "%b", dp->d_flags, 1056 "\20" 1057 "\2OPEN" 1058 "\3CANDELETE" 1059 "\4CANFLUSHCACHE" 1060 "\5UNMAPPEDBIO" 1061 "\6DIRECTCOMPLETION" 1062 "\10CANZONE" 1063 "\11WRITEPROTECT"); 1064 1065 sbuf_finish(sb); 1066 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1); 1067 sbuf_delete(sb); 1068 return (error); 1069 } 1070 1071 static int 1072 sysctl_disks(SYSCTL_HANDLER_ARGS) 1073 { 1074 int error; 1075 struct sbuf *sb; 1076 1077 sb = sbuf_new_auto(); 1078 g_waitfor_event(g_kern_disks, sb, M_WAITOK, NULL); 1079 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1); 1080 sbuf_delete(sb); 1081 return error; 1082 } 1083 1084 SYSCTL_PROC(_kern, OID_AUTO, disks, 1085 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 1086 sysctl_disks, "A", "names of available disks"); 1087