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