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