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