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