1 /*- 2 * Copyright (c) 2002 Poul-Henning Kamp 3 * Copyright (c) 2002 Networks Associates Technology, Inc. 4 * All rights reserved. 5 * 6 * This software was developed for the FreeBSD Project by Poul-Henning Kamp 7 * and NAI Labs, the Security Research Division of Network Associates, Inc. 8 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the 9 * DARPA CHATS research program. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. The names of the authors may not be used to endorse or promote 20 * products derived from this software without specific prior written 21 * permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 #include "opt_geom.h" 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/kernel.h> 44 #include <sys/sysctl.h> 45 #include <sys/bio.h> 46 #include <sys/bus.h> 47 #include <sys/ctype.h> 48 #include <sys/fcntl.h> 49 #include <sys/malloc.h> 50 #include <sys/sbuf.h> 51 #include <sys/devicestat.h> 52 #include <machine/md_var.h> 53 54 #include <sys/lock.h> 55 #include <sys/mutex.h> 56 #include <geom/geom.h> 57 #include <geom/geom_disk.h> 58 #include <geom/geom_int.h> 59 60 #include <dev/led/led.h> 61 62 #include <machine/bus.h> 63 64 struct g_disk_softc { 65 struct mtx done_mtx; 66 struct disk *dp; 67 struct sysctl_ctx_list sysctl_ctx; 68 struct sysctl_oid *sysctl_tree; 69 char led[64]; 70 uint32_t state; 71 struct mtx start_mtx; 72 }; 73 74 static g_access_t g_disk_access; 75 static g_start_t g_disk_start; 76 static g_ioctl_t g_disk_ioctl; 77 static g_dumpconf_t g_disk_dumpconf; 78 static g_provgone_t g_disk_providergone; 79 80 static struct g_class g_disk_class = { 81 .name = G_DISK_CLASS_NAME, 82 .version = G_VERSION, 83 .start = g_disk_start, 84 .access = g_disk_access, 85 .ioctl = g_disk_ioctl, 86 .providergone = g_disk_providergone, 87 .dumpconf = g_disk_dumpconf, 88 }; 89 90 SYSCTL_DECL(_kern_geom); 91 static SYSCTL_NODE(_kern_geom, OID_AUTO, disk, CTLFLAG_RW, 0, 92 "GEOM_DISK stuff"); 93 94 DECLARE_GEOM_CLASS(g_disk_class, g_disk); 95 96 static int 97 g_disk_access(struct g_provider *pp, int r, int w, int e) 98 { 99 struct disk *dp; 100 struct g_disk_softc *sc; 101 int error; 102 103 g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)", 104 pp->name, r, w, e); 105 g_topology_assert(); 106 sc = pp->private; 107 if (sc == NULL || (dp = sc->dp) == NULL || dp->d_destroyed) { 108 /* 109 * Allow decreasing access count even if disk is not 110 * available anymore. 111 */ 112 if (r <= 0 && w <= 0 && e <= 0) 113 return (0); 114 return (ENXIO); 115 } 116 r += pp->acr; 117 w += pp->acw; 118 e += pp->ace; 119 error = 0; 120 if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) { 121 if (dp->d_open != NULL) { 122 error = dp->d_open(dp); 123 if (bootverbose && error != 0) 124 printf("Opened disk %s -> %d\n", 125 pp->name, error); 126 if (error != 0) 127 return (error); 128 } 129 pp->mediasize = dp->d_mediasize; 130 pp->sectorsize = dp->d_sectorsize; 131 if (dp->d_maxsize == 0) { 132 printf("WARNING: Disk drive %s%d has no d_maxsize\n", 133 dp->d_name, dp->d_unit); 134 dp->d_maxsize = DFLTPHYS; 135 } 136 if (dp->d_delmaxsize == 0) { 137 if (bootverbose && dp->d_flags & DISKFLAG_CANDELETE) { 138 printf("WARNING: Disk drive %s%d has no " 139 "d_delmaxsize\n", dp->d_name, dp->d_unit); 140 } 141 dp->d_delmaxsize = dp->d_maxsize; 142 } 143 pp->stripeoffset = dp->d_stripeoffset; 144 pp->stripesize = dp->d_stripesize; 145 dp->d_flags |= DISKFLAG_OPEN; 146 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) { 147 if (dp->d_close != NULL) { 148 error = dp->d_close(dp); 149 if (error != 0) 150 printf("Closed disk %s -> %d\n", 151 pp->name, error); 152 } 153 sc->state = G_STATE_ACTIVE; 154 if (sc->led[0] != 0) 155 led_set(sc->led, "0"); 156 dp->d_flags &= ~DISKFLAG_OPEN; 157 } 158 return (error); 159 } 160 161 static void 162 g_disk_kerneldump(struct bio *bp, struct disk *dp) 163 { 164 struct g_kerneldump *gkd; 165 struct g_geom *gp; 166 167 gkd = (struct g_kerneldump*)bp->bio_data; 168 gp = bp->bio_to->geom; 169 g_trace(G_T_TOPOLOGY, "g_disk_kerneldump(%s, %jd, %jd)", 170 gp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length); 171 if (dp->d_dump == NULL) { 172 g_io_deliver(bp, ENODEV); 173 return; 174 } 175 gkd->di.dumper = dp->d_dump; 176 gkd->di.priv = dp; 177 gkd->di.blocksize = dp->d_sectorsize; 178 gkd->di.maxiosize = dp->d_maxsize; 179 gkd->di.mediaoffset = gkd->offset; 180 if ((gkd->offset + gkd->length) > dp->d_mediasize) 181 gkd->length = dp->d_mediasize - gkd->offset; 182 gkd->di.mediasize = gkd->length; 183 g_io_deliver(bp, 0); 184 } 185 186 static void 187 g_disk_setstate(struct bio *bp, struct g_disk_softc *sc) 188 { 189 const char *cmd; 190 191 memcpy(&sc->state, bp->bio_data, sizeof(sc->state)); 192 if (sc->led[0] != 0) { 193 switch (sc->state) { 194 case G_STATE_FAILED: 195 cmd = "1"; 196 break; 197 case G_STATE_REBUILD: 198 cmd = "f5"; 199 break; 200 case G_STATE_RESYNC: 201 cmd = "f1"; 202 break; 203 default: 204 cmd = "0"; 205 break; 206 } 207 led_set(sc->led, cmd); 208 } 209 g_io_deliver(bp, 0); 210 } 211 212 static void 213 g_disk_done(struct bio *bp) 214 { 215 struct bintime now; 216 struct bio *bp2; 217 struct g_disk_softc *sc; 218 219 /* See "notes" for why we need a mutex here */ 220 /* XXX: will witness accept a mix of Giant/unGiant drivers here ? */ 221 bp2 = bp->bio_parent; 222 sc = bp2->bio_to->private; 223 bp->bio_completed = bp->bio_length - bp->bio_resid; 224 binuptime(&now); 225 mtx_lock(&sc->done_mtx); 226 if (bp2->bio_error == 0) 227 bp2->bio_error = bp->bio_error; 228 bp2->bio_completed += bp->bio_completed; 229 switch (bp->bio_cmd) { 230 case BIO_READ: 231 case BIO_WRITE: 232 case BIO_DELETE: 233 case BIO_FLUSH: 234 devstat_end_transaction_bio_bt(sc->dp->d_devstat, bp, &now); 235 break; 236 default: 237 break; 238 } 239 bp2->bio_inbed++; 240 if (bp2->bio_children == bp2->bio_inbed) { 241 mtx_unlock(&sc->done_mtx); 242 bp2->bio_resid = bp2->bio_bcount - bp2->bio_completed; 243 g_io_deliver(bp2, bp2->bio_error); 244 } else 245 mtx_unlock(&sc->done_mtx); 246 g_destroy_bio(bp); 247 } 248 249 static int 250 g_disk_ioctl(struct g_provider *pp, u_long cmd, void * data, int fflag, struct thread *td) 251 { 252 struct disk *dp; 253 struct g_disk_softc *sc; 254 int error; 255 256 sc = pp->private; 257 dp = sc->dp; 258 259 if (dp->d_ioctl == NULL) 260 return (ENOIOCTL); 261 error = dp->d_ioctl(dp, cmd, data, fflag, td); 262 return (error); 263 } 264 265 static off_t 266 g_disk_maxsize(struct disk *dp, struct bio *bp) 267 { 268 if (bp->bio_cmd == BIO_DELETE) 269 return (dp->d_delmaxsize); 270 return (dp->d_maxsize); 271 } 272 273 static int 274 g_disk_maxsegs(struct disk *dp, struct bio *bp) 275 { 276 return ((g_disk_maxsize(dp, bp) / PAGE_SIZE) + 1); 277 } 278 279 static void 280 g_disk_advance(struct disk *dp, struct bio *bp, off_t off) 281 { 282 283 bp->bio_offset += off; 284 bp->bio_length -= off; 285 286 if ((bp->bio_flags & BIO_VLIST) != 0) { 287 bus_dma_segment_t *seg, *end; 288 289 seg = (bus_dma_segment_t *)bp->bio_data; 290 end = (bus_dma_segment_t *)bp->bio_data + bp->bio_ma_n; 291 off += bp->bio_ma_offset; 292 while (off >= seg->ds_len) { 293 KASSERT((seg != end), 294 ("vlist request runs off the end")); 295 off -= seg->ds_len; 296 seg++; 297 } 298 bp->bio_ma_offset = off; 299 bp->bio_ma_n = end - seg; 300 bp->bio_data = (void *)seg; 301 } else if ((bp->bio_flags & BIO_UNMAPPED) != 0) { 302 bp->bio_ma += off / PAGE_SIZE; 303 bp->bio_ma_offset += off; 304 bp->bio_ma_offset %= PAGE_SIZE; 305 bp->bio_ma_n -= off / PAGE_SIZE; 306 } else { 307 bp->bio_data += off; 308 } 309 } 310 311 static void 312 g_disk_seg_limit(bus_dma_segment_t *seg, off_t *poffset, 313 off_t *plength, int *ppages) 314 { 315 uintptr_t seg_page_base; 316 uintptr_t seg_page_end; 317 off_t offset; 318 off_t length; 319 int seg_pages; 320 321 offset = *poffset; 322 length = *plength; 323 324 if (length > seg->ds_len - offset) 325 length = seg->ds_len - offset; 326 327 seg_page_base = trunc_page(seg->ds_addr + offset); 328 seg_page_end = round_page(seg->ds_addr + offset + length); 329 seg_pages = (seg_page_end - seg_page_base) >> PAGE_SHIFT; 330 331 if (seg_pages > *ppages) { 332 seg_pages = *ppages; 333 length = (seg_page_base + (seg_pages << PAGE_SHIFT)) - 334 (seg->ds_addr + offset); 335 } 336 337 *poffset = 0; 338 *plength -= length; 339 *ppages -= seg_pages; 340 } 341 342 static off_t 343 g_disk_vlist_limit(struct disk *dp, struct bio *bp, bus_dma_segment_t **pendseg) 344 { 345 bus_dma_segment_t *seg, *end; 346 off_t residual; 347 off_t offset; 348 int pages; 349 350 seg = (bus_dma_segment_t *)bp->bio_data; 351 end = (bus_dma_segment_t *)bp->bio_data + bp->bio_ma_n; 352 residual = bp->bio_length; 353 offset = bp->bio_ma_offset; 354 pages = g_disk_maxsegs(dp, bp); 355 while (residual != 0 && pages != 0) { 356 KASSERT((seg != end), 357 ("vlist limit runs off the end")); 358 g_disk_seg_limit(seg, &offset, &residual, &pages); 359 seg++; 360 } 361 if (pendseg != NULL) 362 *pendseg = seg; 363 return (residual); 364 } 365 366 static bool 367 g_disk_limit(struct disk *dp, struct bio *bp) 368 { 369 bool limited = false; 370 off_t maxsz; 371 372 maxsz = g_disk_maxsize(dp, bp); 373 374 /* 375 * XXX: If we have a stripesize we should really use it here. 376 * Care should be taken in the delete case if this is done 377 * as deletes can be very sensitive to size given how they 378 * are processed. 379 */ 380 if (bp->bio_length > maxsz) { 381 bp->bio_length = maxsz; 382 limited = true; 383 } 384 385 if ((bp->bio_flags & BIO_VLIST) != 0) { 386 bus_dma_segment_t *firstseg, *endseg; 387 off_t residual; 388 389 firstseg = (bus_dma_segment_t*)bp->bio_data; 390 residual = g_disk_vlist_limit(dp, bp, &endseg); 391 if (residual != 0) { 392 bp->bio_ma_n = endseg - firstseg; 393 bp->bio_length -= residual; 394 limited = true; 395 } 396 } else if ((bp->bio_flags & BIO_UNMAPPED) != 0) { 397 bp->bio_ma_n = 398 howmany(bp->bio_ma_offset + bp->bio_length, PAGE_SIZE); 399 } 400 401 return (limited); 402 } 403 404 static void 405 g_disk_start(struct bio *bp) 406 { 407 struct bio *bp2, *bp3; 408 struct disk *dp; 409 struct g_disk_softc *sc; 410 int error; 411 off_t off; 412 413 sc = bp->bio_to->private; 414 if (sc == NULL || (dp = sc->dp) == NULL || dp->d_destroyed) { 415 g_io_deliver(bp, ENXIO); 416 return; 417 } 418 error = EJUSTRETURN; 419 switch(bp->bio_cmd) { 420 case BIO_DELETE: 421 if (!(dp->d_flags & DISKFLAG_CANDELETE)) { 422 error = EOPNOTSUPP; 423 break; 424 } 425 /* fall-through */ 426 case BIO_READ: 427 case BIO_WRITE: 428 KASSERT((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0 || 429 (bp->bio_flags & BIO_UNMAPPED) == 0, 430 ("unmapped bio not supported by disk %s", dp->d_name)); 431 off = 0; 432 bp3 = NULL; 433 bp2 = g_clone_bio(bp); 434 if (bp2 == NULL) { 435 error = ENOMEM; 436 break; 437 } 438 for (;;) { 439 if (g_disk_limit(dp, bp2)) { 440 off += bp2->bio_length; 441 442 /* 443 * To avoid a race, we need to grab the next bio 444 * before we schedule this one. See "notes". 445 */ 446 bp3 = g_clone_bio(bp); 447 if (bp3 == NULL) 448 bp->bio_error = ENOMEM; 449 } 450 bp2->bio_done = g_disk_done; 451 bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize; 452 bp2->bio_bcount = bp2->bio_length; 453 bp2->bio_disk = dp; 454 mtx_lock(&sc->start_mtx); 455 devstat_start_transaction_bio(dp->d_devstat, bp2); 456 mtx_unlock(&sc->start_mtx); 457 dp->d_strategy(bp2); 458 459 if (bp3 == NULL) 460 break; 461 462 bp2 = bp3; 463 bp3 = NULL; 464 g_disk_advance(dp, bp2, off); 465 } 466 break; 467 case BIO_GETATTR: 468 /* Give the driver a chance to override */ 469 if (dp->d_getattr != NULL) { 470 if (bp->bio_disk == NULL) 471 bp->bio_disk = dp; 472 error = dp->d_getattr(bp); 473 if (error != -1) 474 break; 475 error = EJUSTRETURN; 476 } 477 if (g_handleattr_int(bp, "GEOM::candelete", 478 (dp->d_flags & DISKFLAG_CANDELETE) != 0)) 479 break; 480 else if (g_handleattr_int(bp, "GEOM::fwsectors", 481 dp->d_fwsectors)) 482 break; 483 else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads)) 484 break; 485 else if (g_handleattr_off_t(bp, "GEOM::frontstuff", 0)) 486 break; 487 else if (g_handleattr_str(bp, "GEOM::ident", dp->d_ident)) 488 break; 489 else if (g_handleattr_uint16_t(bp, "GEOM::hba_vendor", 490 dp->d_hba_vendor)) 491 break; 492 else if (g_handleattr_uint16_t(bp, "GEOM::hba_device", 493 dp->d_hba_device)) 494 break; 495 else if (g_handleattr_uint16_t(bp, "GEOM::hba_subvendor", 496 dp->d_hba_subvendor)) 497 break; 498 else if (g_handleattr_uint16_t(bp, "GEOM::hba_subdevice", 499 dp->d_hba_subdevice)) 500 break; 501 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump")) 502 g_disk_kerneldump(bp, dp); 503 else if (!strcmp(bp->bio_attribute, "GEOM::setstate")) 504 g_disk_setstate(bp, sc); 505 else if (g_handleattr_uint16_t(bp, "GEOM::rotation_rate", 506 dp->d_rotation_rate)) 507 break; 508 else 509 error = ENOIOCTL; 510 break; 511 case BIO_FLUSH: 512 g_trace(G_T_BIO, "g_disk_flushcache(%s)", 513 bp->bio_to->name); 514 if (!(dp->d_flags & DISKFLAG_CANFLUSHCACHE)) { 515 error = EOPNOTSUPP; 516 break; 517 } 518 bp2 = g_clone_bio(bp); 519 if (bp2 == NULL) { 520 g_io_deliver(bp, ENOMEM); 521 return; 522 } 523 bp2->bio_done = g_disk_done; 524 bp2->bio_disk = dp; 525 mtx_lock(&sc->start_mtx); 526 devstat_start_transaction_bio(dp->d_devstat, bp2); 527 mtx_unlock(&sc->start_mtx); 528 dp->d_strategy(bp2); 529 break; 530 default: 531 error = EOPNOTSUPP; 532 break; 533 } 534 if (error != EJUSTRETURN) 535 g_io_deliver(bp, error); 536 return; 537 } 538 539 static void 540 g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp) 541 { 542 struct bio *bp; 543 struct disk *dp; 544 struct g_disk_softc *sc; 545 char *buf; 546 int res = 0; 547 548 sc = gp->softc; 549 if (sc == NULL || (dp = sc->dp) == NULL) 550 return; 551 if (indent == NULL) { 552 sbuf_printf(sb, " hd %u", dp->d_fwheads); 553 sbuf_printf(sb, " sc %u", dp->d_fwsectors); 554 return; 555 } 556 if (pp != NULL) { 557 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n", 558 indent, dp->d_fwheads); 559 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n", 560 indent, dp->d_fwsectors); 561 562 /* 563 * "rotationrate" is a little complicated, because the value 564 * returned by the drive might not be the RPM; 0 and 1 are 565 * special cases, and there's also a valid range. 566 */ 567 sbuf_printf(sb, "%s<rotationrate>", indent); 568 if (dp->d_rotation_rate == 0) /* Old drives don't */ 569 sbuf_printf(sb, "unknown"); /* report RPM. */ 570 else if (dp->d_rotation_rate == 1) /* Since 0 is used */ 571 sbuf_printf(sb, "0"); /* above, SSDs use 1. */ 572 else if ((dp->d_rotation_rate >= 0x041) && 573 (dp->d_rotation_rate <= 0xfffe)) 574 sbuf_printf(sb, "%u", dp->d_rotation_rate); 575 else 576 sbuf_printf(sb, "invalid"); 577 sbuf_printf(sb, "</rotationrate>\n"); 578 if (dp->d_getattr != NULL) { 579 buf = g_malloc(DISK_IDENT_SIZE, M_WAITOK); 580 bp = g_alloc_bio(); 581 bp->bio_disk = dp; 582 bp->bio_attribute = "GEOM::ident"; 583 bp->bio_length = DISK_IDENT_SIZE; 584 bp->bio_data = buf; 585 res = dp->d_getattr(bp); 586 sbuf_printf(sb, "%s<ident>", indent); 587 g_conf_printf_escaped(sb, "%s", 588 res == 0 ? buf: dp->d_ident); 589 sbuf_printf(sb, "</ident>\n"); 590 bp->bio_attribute = "GEOM::lunid"; 591 bp->bio_length = DISK_IDENT_SIZE; 592 bp->bio_data = buf; 593 if (dp->d_getattr(bp) == 0) { 594 sbuf_printf(sb, "%s<lunid>", indent); 595 g_conf_printf_escaped(sb, "%s", buf); 596 sbuf_printf(sb, "</lunid>\n"); 597 } 598 bp->bio_attribute = "GEOM::lunname"; 599 bp->bio_length = DISK_IDENT_SIZE; 600 bp->bio_data = buf; 601 if (dp->d_getattr(bp) == 0) { 602 sbuf_printf(sb, "%s<lunname>", indent); 603 g_conf_printf_escaped(sb, "%s", buf); 604 sbuf_printf(sb, "</lunname>\n"); 605 } 606 g_destroy_bio(bp); 607 g_free(buf); 608 } else { 609 sbuf_printf(sb, "%s<ident>", indent); 610 g_conf_printf_escaped(sb, "%s", dp->d_ident); 611 sbuf_printf(sb, "</ident>\n"); 612 } 613 sbuf_printf(sb, "%s<descr>", indent); 614 g_conf_printf_escaped(sb, "%s", dp->d_descr); 615 sbuf_printf(sb, "</descr>\n"); 616 } 617 } 618 619 static void 620 g_disk_resize(void *ptr, int flag) 621 { 622 struct disk *dp; 623 struct g_geom *gp; 624 struct g_provider *pp; 625 626 if (flag == EV_CANCEL) 627 return; 628 g_topology_assert(); 629 630 dp = ptr; 631 gp = dp->d_geom; 632 633 if (dp->d_destroyed || gp == NULL) 634 return; 635 636 LIST_FOREACH(pp, &gp->provider, provider) { 637 if (pp->sectorsize != 0 && 638 pp->sectorsize != dp->d_sectorsize) 639 g_wither_provider(pp, ENXIO); 640 else 641 g_resize_provider(pp, dp->d_mediasize); 642 } 643 } 644 645 static void 646 g_disk_create(void *arg, int flag) 647 { 648 struct g_geom *gp; 649 struct g_provider *pp; 650 struct disk *dp; 651 struct g_disk_softc *sc; 652 char tmpstr[80]; 653 654 if (flag == EV_CANCEL) 655 return; 656 g_topology_assert(); 657 dp = arg; 658 sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO); 659 mtx_init(&sc->start_mtx, "g_disk_start", NULL, MTX_DEF); 660 mtx_init(&sc->done_mtx, "g_disk_done", NULL, MTX_DEF); 661 sc->dp = dp; 662 gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit); 663 gp->softc = sc; 664 pp = g_new_providerf(gp, "%s", gp->name); 665 devstat_remove_entry(pp->stat); 666 pp->stat = NULL; 667 dp->d_devstat->id = pp; 668 pp->mediasize = dp->d_mediasize; 669 pp->sectorsize = dp->d_sectorsize; 670 pp->stripeoffset = dp->d_stripeoffset; 671 pp->stripesize = dp->d_stripesize; 672 if ((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0) 673 pp->flags |= G_PF_ACCEPT_UNMAPPED; 674 if ((dp->d_flags & DISKFLAG_DIRECT_COMPLETION) != 0) 675 pp->flags |= G_PF_DIRECT_SEND; 676 pp->flags |= G_PF_DIRECT_RECEIVE; 677 if (bootverbose) 678 printf("GEOM: new disk %s\n", gp->name); 679 sysctl_ctx_init(&sc->sysctl_ctx); 680 snprintf(tmpstr, sizeof(tmpstr), "GEOM disk %s", gp->name); 681 sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx, 682 SYSCTL_STATIC_CHILDREN(_kern_geom_disk), OID_AUTO, gp->name, 683 CTLFLAG_RD, 0, tmpstr); 684 if (sc->sysctl_tree != NULL) { 685 SYSCTL_ADD_STRING(&sc->sysctl_ctx, 686 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "led", 687 CTLFLAG_RWTUN, sc->led, sizeof(sc->led), 688 "LED name"); 689 } 690 pp->private = sc; 691 dp->d_geom = gp; 692 g_error_provider(pp, 0); 693 } 694 695 /* 696 * We get this callback after all of the consumers have gone away, and just 697 * before the provider is freed. If the disk driver provided a d_gone 698 * callback, let them know that it is okay to free resources -- they won't 699 * be getting any more accesses from GEOM. 700 */ 701 static void 702 g_disk_providergone(struct g_provider *pp) 703 { 704 struct disk *dp; 705 struct g_disk_softc *sc; 706 707 sc = (struct g_disk_softc *)pp->private; 708 dp = sc->dp; 709 if (dp != NULL && dp->d_gone != NULL) 710 dp->d_gone(dp); 711 if (sc->sysctl_tree != NULL) { 712 sysctl_ctx_free(&sc->sysctl_ctx); 713 sc->sysctl_tree = NULL; 714 } 715 if (sc->led[0] != 0) { 716 led_set(sc->led, "0"); 717 sc->led[0] = 0; 718 } 719 pp->private = NULL; 720 pp->geom->softc = NULL; 721 mtx_destroy(&sc->done_mtx); 722 mtx_destroy(&sc->start_mtx); 723 g_free(sc); 724 } 725 726 static void 727 g_disk_destroy(void *ptr, int flag) 728 { 729 struct disk *dp; 730 struct g_geom *gp; 731 struct g_disk_softc *sc; 732 733 g_topology_assert(); 734 dp = ptr; 735 gp = dp->d_geom; 736 if (gp != NULL) { 737 sc = gp->softc; 738 if (sc != NULL) 739 sc->dp = NULL; 740 dp->d_geom = NULL; 741 g_wither_geom(gp, ENXIO); 742 } 743 g_free(dp); 744 } 745 746 /* 747 * We only allow printable characters in disk ident, 748 * the rest is converted to 'x<HH>'. 749 */ 750 static void 751 g_disk_ident_adjust(char *ident, size_t size) 752 { 753 char *p, tmp[4], newid[DISK_IDENT_SIZE]; 754 755 newid[0] = '\0'; 756 for (p = ident; *p != '\0'; p++) { 757 if (isprint(*p)) { 758 tmp[0] = *p; 759 tmp[1] = '\0'; 760 } else { 761 snprintf(tmp, sizeof(tmp), "x%02hhx", 762 *(unsigned char *)p); 763 } 764 if (strlcat(newid, tmp, sizeof(newid)) >= sizeof(newid)) 765 break; 766 } 767 bzero(ident, size); 768 strlcpy(ident, newid, size); 769 } 770 771 struct disk * 772 disk_alloc(void) 773 { 774 775 return (g_malloc(sizeof(struct disk), M_WAITOK | M_ZERO)); 776 } 777 778 void 779 disk_create(struct disk *dp, int version) 780 { 781 782 if (version != DISK_VERSION) { 783 printf("WARNING: Attempt to add disk %s%d %s", 784 dp->d_name, dp->d_unit, 785 " using incompatible ABI version of disk(9)\n"); 786 printf("WARNING: Ignoring disk %s%d\n", 787 dp->d_name, dp->d_unit); 788 return; 789 } 790 if (dp->d_flags & DISKFLAG_RESERVED) { 791 printf("WARNING: Attempt to add non-MPSAFE disk %s%d\n", 792 dp->d_name, dp->d_unit); 793 printf("WARNING: Ignoring disk %s%d\n", 794 dp->d_name, dp->d_unit); 795 return; 796 } 797 KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy")); 798 KASSERT(dp->d_name != NULL, ("disk_create need d_name")); 799 KASSERT(*dp->d_name != 0, ("disk_create need d_name")); 800 KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long")); 801 if (dp->d_devstat == NULL) 802 dp->d_devstat = devstat_new_entry(dp->d_name, dp->d_unit, 803 dp->d_sectorsize, DEVSTAT_ALL_SUPPORTED, 804 DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX); 805 dp->d_geom = NULL; 806 g_disk_ident_adjust(dp->d_ident, sizeof(dp->d_ident)); 807 g_post_event(g_disk_create, dp, M_WAITOK, dp, NULL); 808 } 809 810 void 811 disk_destroy(struct disk *dp) 812 { 813 814 g_cancel_event(dp); 815 dp->d_destroyed = 1; 816 if (dp->d_devstat != NULL) 817 devstat_remove_entry(dp->d_devstat); 818 g_post_event(g_disk_destroy, dp, M_WAITOK, NULL); 819 } 820 821 void 822 disk_gone(struct disk *dp) 823 { 824 struct g_geom *gp; 825 struct g_provider *pp; 826 827 gp = dp->d_geom; 828 if (gp != NULL) { 829 pp = LIST_FIRST(&gp->provider); 830 if (pp != NULL) { 831 KASSERT(LIST_NEXT(pp, provider) == NULL, 832 ("geom %p has more than one provider", gp)); 833 g_wither_provider(pp, ENXIO); 834 } 835 } 836 } 837 838 void 839 disk_attr_changed(struct disk *dp, const char *attr, int flag) 840 { 841 struct g_geom *gp; 842 struct g_provider *pp; 843 char devnamebuf[128]; 844 845 gp = dp->d_geom; 846 if (gp != NULL) 847 LIST_FOREACH(pp, &gp->provider, provider) 848 (void)g_attr_changed(pp, attr, flag); 849 snprintf(devnamebuf, sizeof(devnamebuf), "devname=%s%d", dp->d_name, 850 dp->d_unit); 851 devctl_notify("GEOM", "disk", attr, devnamebuf); 852 } 853 854 void 855 disk_media_changed(struct disk *dp, int flag) 856 { 857 struct g_geom *gp; 858 struct g_provider *pp; 859 860 gp = dp->d_geom; 861 if (gp != NULL) { 862 pp = LIST_FIRST(&gp->provider); 863 if (pp != NULL) { 864 KASSERT(LIST_NEXT(pp, provider) == NULL, 865 ("geom %p has more than one provider", gp)); 866 g_media_changed(pp, flag); 867 } 868 } 869 } 870 871 void 872 disk_media_gone(struct disk *dp, int flag) 873 { 874 struct g_geom *gp; 875 struct g_provider *pp; 876 877 gp = dp->d_geom; 878 if (gp != NULL) { 879 pp = LIST_FIRST(&gp->provider); 880 if (pp != NULL) { 881 KASSERT(LIST_NEXT(pp, provider) == NULL, 882 ("geom %p has more than one provider", gp)); 883 g_media_gone(pp, flag); 884 } 885 } 886 } 887 888 int 889 disk_resize(struct disk *dp, int flag) 890 { 891 892 if (dp->d_destroyed || dp->d_geom == NULL) 893 return (0); 894 895 return (g_post_event(g_disk_resize, dp, flag, NULL)); 896 } 897 898 static void 899 g_kern_disks(void *p, int flag __unused) 900 { 901 struct sbuf *sb; 902 struct g_geom *gp; 903 char *sp; 904 905 sb = p; 906 sp = ""; 907 g_topology_assert(); 908 LIST_FOREACH(gp, &g_disk_class.geom, geom) { 909 sbuf_printf(sb, "%s%s", sp, gp->name); 910 sp = " "; 911 } 912 sbuf_finish(sb); 913 } 914 915 static int 916 sysctl_disks(SYSCTL_HANDLER_ARGS) 917 { 918 int error; 919 struct sbuf *sb; 920 921 sb = sbuf_new_auto(); 922 g_waitfor_event(g_kern_disks, sb, M_WAITOK, NULL); 923 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1); 924 sbuf_delete(sb); 925 return error; 926 } 927 928 SYSCTL_PROC(_kern, OID_AUTO, disks, 929 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 930 sysctl_disks, "A", "names of available disks"); 931