Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/geom/geom_disk.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
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: releng/9.2/sys/geom/geom_disk.c 252730 2013-07-04 21:57:09Z smh $"); 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 }; 70 71 static g_access_t g_disk_access; 72 static g_start_t g_disk_start; 73 static g_ioctl_t g_disk_ioctl; 74 static g_dumpconf_t g_disk_dumpconf; 75 static g_provgone_t g_disk_providergone; 76 77 static struct g_class g_disk_class = { 78 .name = "DISK", 79 .version = G_VERSION, 80 .start = g_disk_start, 81 .access = g_disk_access, 82 .ioctl = g_disk_ioctl, 83 .providergone = g_disk_providergone, 84 .dumpconf = g_disk_dumpconf, 85 }; 86 87 SYSCTL_DECL(_kern_geom); 88 static SYSCTL_NODE(_kern_geom, OID_AUTO, disk, CTLFLAG_RW, 0, 89 "GEOM_DISK stuff"); 90 91 DECLARE_GEOM_CLASS(g_disk_class, g_disk); 92 93 static void __inline 94 g_disk_lock_giant(struct disk *dp) 95 { 96 97 if (dp->d_flags & DISKFLAG_NEEDSGIANT) 98 mtx_lock(&Giant); 99 } 100 101 static void __inline 102 g_disk_unlock_giant(struct disk *dp) 103 { 104 105 if (dp->d_flags & DISKFLAG_NEEDSGIANT) 106 mtx_unlock(&Giant); 107 } 108 109 static int 110 g_disk_access(struct g_provider *pp, int r, int w, int e) 111 { 112 struct disk *dp; 113 struct g_disk_softc *sc; 114 int error; 115 116 g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)", 117 pp->name, r, w, e); 118 g_topology_assert(); 119 sc = pp->private; 120 if (sc == NULL || (dp = sc->dp) == NULL || dp->d_destroyed) { 121 /* 122 * Allow decreasing access count even if disk is not 123 * avaliable anymore. 124 */ 125 if (r <= 0 && w <= 0 && e <= 0) 126 return (0); 127 return (ENXIO); 128 } 129 r += pp->acr; 130 w += pp->acw; 131 e += pp->ace; 132 error = 0; 133 if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) { 134 if (dp->d_open != NULL) { 135 g_disk_lock_giant(dp); 136 error = dp->d_open(dp); 137 if (bootverbose && error != 0) 138 printf("Opened disk %s -> %d\n", 139 pp->name, error); 140 g_disk_unlock_giant(dp); 141 if (error != 0) 142 return (error); 143 } 144 pp->mediasize = dp->d_mediasize; 145 pp->sectorsize = dp->d_sectorsize; 146 if (dp->d_flags & DISKFLAG_CANDELETE) 147 pp->flags |= G_PF_CANDELETE; 148 else 149 pp->flags &= ~G_PF_CANDELETE; 150 pp->stripeoffset = dp->d_stripeoffset; 151 pp->stripesize = dp->d_stripesize; 152 dp->d_flags |= DISKFLAG_OPEN; 153 if (dp->d_maxsize == 0) { 154 printf("WARNING: Disk drive %s%d has no d_maxsize\n", 155 dp->d_name, dp->d_unit); 156 dp->d_maxsize = DFLTPHYS; 157 } 158 if (dp->d_delmaxsize == 0) { 159 if (bootverbose && dp->d_flags & DISKFLAG_CANDELETE) { 160 printf("WARNING: Disk drive %s%d has no " 161 "d_delmaxsize\n", dp->d_name, dp->d_unit); 162 } 163 dp->d_delmaxsize = dp->d_maxsize; 164 } 165 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) { 166 if (dp->d_close != NULL) { 167 g_disk_lock_giant(dp); 168 error = dp->d_close(dp); 169 if (error != 0) 170 printf("Closed disk %s -> %d\n", 171 pp->name, error); 172 g_disk_unlock_giant(dp); 173 } 174 sc->state = G_STATE_ACTIVE; 175 if (sc->led[0] != 0) 176 led_set(sc->led, ""); 177 dp->d_flags &= ~DISKFLAG_OPEN; 178 } 179 return (error); 180 } 181 182 static void 183 g_disk_kerneldump(struct bio *bp, struct disk *dp) 184 { 185 struct g_kerneldump *gkd; 186 struct g_geom *gp; 187 188 gkd = (struct g_kerneldump*)bp->bio_data; 189 gp = bp->bio_to->geom; 190 g_trace(G_T_TOPOLOGY, "g_disk_kernedump(%s, %jd, %jd)", 191 gp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length); 192 if (dp->d_dump == NULL) { 193 g_io_deliver(bp, ENODEV); 194 return; 195 } 196 gkd->di.dumper = dp->d_dump; 197 gkd->di.priv = dp; 198 gkd->di.blocksize = dp->d_sectorsize; 199 gkd->di.maxiosize = dp->d_maxsize; 200 gkd->di.mediaoffset = gkd->offset; 201 if ((gkd->offset + gkd->length) > dp->d_mediasize) 202 gkd->length = dp->d_mediasize - gkd->offset; 203 gkd->di.mediasize = gkd->length; 204 g_io_deliver(bp, 0); 205 } 206 207 static void 208 g_disk_setstate(struct bio *bp, struct g_disk_softc *sc) 209 { 210 const char *cmd; 211 212 memcpy(&sc->state, bp->bio_data, sizeof(sc->state)); 213 if (sc->led[0] != 0) { 214 switch (sc->state) { 215 case G_STATE_FAILED: 216 cmd = "1"; 217 break; 218 case G_STATE_REBUILD: 219 cmd = "f5"; 220 break; 221 case G_STATE_RESYNC: 222 cmd = "f1"; 223 break; 224 default: 225 cmd = ""; 226 break; 227 } 228 led_set(sc->led, cmd); 229 } 230 g_io_deliver(bp, 0); 231 } 232 233 static void 234 g_disk_done(struct bio *bp) 235 { 236 struct bio *bp2; 237 struct g_disk_softc *sc; 238 239 /* See "notes" for why we need a mutex here */ 240 /* XXX: will witness accept a mix of Giant/unGiant drivers here ? */ 241 bp2 = bp->bio_parent; 242 sc = bp2->bio_to->private; 243 bp->bio_completed = bp->bio_length - bp->bio_resid; 244 mtx_lock(&sc->done_mtx); 245 if (bp2->bio_error == 0) 246 bp2->bio_error = bp->bio_error; 247 bp2->bio_completed += bp->bio_completed; 248 if ((bp->bio_cmd & (BIO_READ|BIO_WRITE|BIO_DELETE)) != 0) 249 devstat_end_transaction_bio(sc->dp->d_devstat, bp); 250 g_destroy_bio(bp); 251 bp2->bio_inbed++; 252 if (bp2->bio_children == bp2->bio_inbed) { 253 bp2->bio_resid = bp2->bio_bcount - bp2->bio_completed; 254 g_io_deliver(bp2, bp2->bio_error); 255 } 256 mtx_unlock(&sc->done_mtx); 257 } 258 259 static int 260 g_disk_ioctl(struct g_provider *pp, u_long cmd, void * data, int fflag, struct thread *td) 261 { 262 struct disk *dp; 263 struct g_disk_softc *sc; 264 int error; 265 266 sc = pp->private; 267 dp = sc->dp; 268 269 if (dp->d_ioctl == NULL) 270 return (ENOIOCTL); 271 g_disk_lock_giant(dp); 272 error = dp->d_ioctl(dp, cmd, data, fflag, td); 273 g_disk_unlock_giant(dp); 274 return (error); 275 } 276 277 static void 278 g_disk_start(struct bio *bp) 279 { 280 struct bio *bp2, *bp3; 281 struct disk *dp; 282 struct g_disk_softc *sc; 283 int error; 284 off_t off; 285 286 sc = bp->bio_to->private; 287 if (sc == NULL || (dp = sc->dp) == NULL || dp->d_destroyed) { 288 g_io_deliver(bp, ENXIO); 289 return; 290 } 291 error = EJUSTRETURN; 292 switch(bp->bio_cmd) { 293 case BIO_DELETE: 294 if (!(dp->d_flags & DISKFLAG_CANDELETE)) { 295 error = EOPNOTSUPP; 296 break; 297 } 298 /* fall-through */ 299 case BIO_READ: 300 case BIO_WRITE: 301 off = 0; 302 bp3 = NULL; 303 bp2 = g_clone_bio(bp); 304 if (bp2 == NULL) { 305 error = ENOMEM; 306 break; 307 } 308 do { 309 off_t d_maxsize; 310 311 d_maxsize = (bp->bio_cmd == BIO_DELETE && 312 (dp->d_flags & DISKFLAG_LACKS_DELMAX) == 0) ? 313 dp->d_delmaxsize : dp->d_maxsize; 314 315 bp2->bio_offset += off; 316 bp2->bio_length -= off; 317 if ((bp->bio_flags & BIO_UNMAPPED) == 0) { 318 bp2->bio_data += off; 319 } else { 320 KASSERT((dp->d_flags & DISKFLAG_UNMAPPED_BIO) 321 != 0, 322 ("unmapped bio not supported by disk %s", 323 dp->d_name)); 324 bp2->bio_ma += off / PAGE_SIZE; 325 bp2->bio_ma_offset += off; 326 bp2->bio_ma_offset %= PAGE_SIZE; 327 bp2->bio_ma_n -= off / PAGE_SIZE; 328 } 329 if (bp2->bio_length > d_maxsize) { 330 /* 331 * XXX: If we have a stripesize we should really 332 * use it here. Care should be taken in the delete 333 * case if this is done as deletes can be very 334 * sensitive to size given how they are processed. 335 */ 336 bp2->bio_length = d_maxsize; 337 if ((bp->bio_flags & BIO_UNMAPPED) != 0) { 338 bp2->bio_ma_n = howmany( 339 bp2->bio_ma_offset + 340 bp2->bio_length, PAGE_SIZE); 341 } 342 off += d_maxsize; 343 /* 344 * To avoid a race, we need to grab the next bio 345 * before we schedule this one. See "notes". 346 */ 347 bp3 = g_clone_bio(bp); 348 if (bp3 == NULL) 349 bp->bio_error = ENOMEM; 350 } 351 bp2->bio_done = g_disk_done; 352 bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize; 353 bp2->bio_bcount = bp2->bio_length; 354 bp2->bio_disk = dp; 355 devstat_start_transaction_bio(dp->d_devstat, bp2); 356 g_disk_lock_giant(dp); 357 dp->d_strategy(bp2); 358 g_disk_unlock_giant(dp); 359 bp2 = bp3; 360 bp3 = NULL; 361 } while (bp2 != NULL); 362 break; 363 case BIO_GETATTR: 364 /* Give the driver a chance to override */ 365 if (dp->d_getattr != NULL) { 366 if (bp->bio_disk == NULL) 367 bp->bio_disk = dp; 368 error = dp->d_getattr(bp); 369 if (error != -1) 370 break; 371 error = EJUSTRETURN; 372 } 373 if (g_handleattr_int(bp, "GEOM::candelete", 374 (dp->d_flags & DISKFLAG_CANDELETE) != 0)) 375 break; 376 else if (g_handleattr_int(bp, "GEOM::fwsectors", 377 dp->d_fwsectors)) 378 break; 379 else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads)) 380 break; 381 else if (g_handleattr_off_t(bp, "GEOM::frontstuff", 0)) 382 break; 383 else if (g_handleattr_str(bp, "GEOM::ident", dp->d_ident)) 384 break; 385 else if (g_handleattr(bp, "GEOM::hba_vendor", 386 &dp->d_hba_vendor, 2)) 387 break; 388 else if (g_handleattr(bp, "GEOM::hba_device", 389 &dp->d_hba_device, 2)) 390 break; 391 else if (g_handleattr(bp, "GEOM::hba_subvendor", 392 &dp->d_hba_subvendor, 2)) 393 break; 394 else if (g_handleattr(bp, "GEOM::hba_subdevice", 395 &dp->d_hba_subdevice, 2)) 396 break; 397 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump")) 398 g_disk_kerneldump(bp, dp); 399 else if (!strcmp(bp->bio_attribute, "GEOM::setstate")) 400 g_disk_setstate(bp, sc); 401 else 402 error = ENOIOCTL; 403 break; 404 case BIO_FLUSH: 405 g_trace(G_T_BIO, "g_disk_flushcache(%s)", 406 bp->bio_to->name); 407 if (!(dp->d_flags & DISKFLAG_CANFLUSHCACHE)) { 408 error = EOPNOTSUPP; 409 break; 410 } 411 bp2 = g_clone_bio(bp); 412 if (bp2 == NULL) { 413 g_io_deliver(bp, ENOMEM); 414 return; 415 } 416 bp2->bio_done = g_disk_done; 417 bp2->bio_disk = dp; 418 g_disk_lock_giant(dp); 419 dp->d_strategy(bp2); 420 g_disk_unlock_giant(dp); 421 break; 422 default: 423 error = EOPNOTSUPP; 424 break; 425 } 426 if (error != EJUSTRETURN) 427 g_io_deliver(bp, error); 428 return; 429 } 430 431 static void 432 g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp) 433 { 434 struct bio *bp; 435 struct disk *dp; 436 struct g_disk_softc *sc; 437 char *buf; 438 int res = 0; 439 440 sc = gp->softc; 441 if (sc == NULL || (dp = sc->dp) == NULL) 442 return; 443 if (indent == NULL) { 444 sbuf_printf(sb, " hd %u", dp->d_fwheads); 445 sbuf_printf(sb, " sc %u", dp->d_fwsectors); 446 return; 447 } 448 if (pp != NULL) { 449 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n", 450 indent, dp->d_fwheads); 451 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n", 452 indent, dp->d_fwsectors); 453 if (dp->d_getattr != NULL) { 454 buf = g_malloc(DISK_IDENT_SIZE, M_WAITOK); 455 bp = g_alloc_bio(); 456 bp->bio_disk = dp; 457 bp->bio_attribute = "GEOM::ident"; 458 bp->bio_length = DISK_IDENT_SIZE; 459 bp->bio_data = buf; 460 res = dp->d_getattr(bp); 461 sbuf_printf(sb, "%s<ident>%s</ident>\n", indent, 462 res == 0 ? buf: dp->d_ident); 463 bp->bio_attribute = "GEOM::lunid"; 464 bp->bio_length = DISK_IDENT_SIZE; 465 bp->bio_data = buf; 466 if (dp->d_getattr(bp) == 0) 467 sbuf_printf(sb, "%s<lunid>%s</lunid>\n", 468 indent, buf); 469 g_destroy_bio(bp); 470 g_free(buf); 471 } else 472 sbuf_printf(sb, "%s<ident>%s</ident>\n", indent, 473 dp->d_ident); 474 sbuf_printf(sb, "%s<descr>%s</descr>\n", indent, dp->d_descr); 475 } 476 } 477 478 static void 479 g_disk_create(void *arg, int flag) 480 { 481 struct g_geom *gp; 482 struct g_provider *pp; 483 struct disk *dp; 484 struct g_disk_softc *sc; 485 char tmpstr[80]; 486 487 if (flag == EV_CANCEL) 488 return; 489 g_topology_assert(); 490 dp = arg; 491 sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO); 492 mtx_init(&sc->done_mtx, "g_disk_done", NULL, MTX_DEF); 493 sc->dp = dp; 494 gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit); 495 gp->softc = sc; 496 pp = g_new_providerf(gp, "%s", gp->name); 497 pp->mediasize = dp->d_mediasize; 498 pp->sectorsize = dp->d_sectorsize; 499 if (dp->d_flags & DISKFLAG_CANDELETE) 500 pp->flags |= G_PF_CANDELETE; 501 pp->stripeoffset = dp->d_stripeoffset; 502 pp->stripesize = dp->d_stripesize; 503 if ((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0) 504 pp->flags |= G_PF_ACCEPT_UNMAPPED; 505 if (bootverbose) 506 printf("GEOM: new disk %s\n", gp->name); 507 sysctl_ctx_init(&sc->sysctl_ctx); 508 snprintf(tmpstr, sizeof(tmpstr), "GEOM disk %s", gp->name); 509 sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx, 510 SYSCTL_STATIC_CHILDREN(_kern_geom_disk), OID_AUTO, gp->name, 511 CTLFLAG_RD, 0, tmpstr); 512 if (sc->sysctl_tree != NULL) { 513 snprintf(tmpstr, sizeof(tmpstr), 514 "kern.geom.disk.%s.led", gp->name); 515 TUNABLE_STR_FETCH(tmpstr, sc->led, sizeof(sc->led)); 516 SYSCTL_ADD_STRING(&sc->sysctl_ctx, 517 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "led", 518 CTLFLAG_RW | CTLFLAG_TUN, sc->led, sizeof(sc->led), 519 "LED name"); 520 } 521 pp->private = sc; 522 dp->d_geom = gp; 523 g_error_provider(pp, 0); 524 } 525 526 /* 527 * We get this callback after all of the consumers have gone away, and just 528 * before the provider is freed. If the disk driver provided a d_gone 529 * callback, let them know that it is okay to free resources -- they won't 530 * be getting any more accesses from GEOM. 531 */ 532 static void 533 g_disk_providergone(struct g_provider *pp) 534 { 535 struct disk *dp; 536 struct g_disk_softc *sc; 537 538 sc = (struct g_disk_softc *)pp->private; 539 dp = sc->dp; 540 541 /* 542 * FreeBSD 9 started with VERSION_01 of the struct disk structure. 543 * However, g_gone was added in the middle of the branch. To 544 * cope with version being missing from struct disk, we set a flag 545 * in g_disk_create for VERSION_01 and avoid touching the d_gone 546 * field for old consumers. 547 */ 548 if (dp != NULL && (dp->d_flags & DISKFLAG_LACKS_GONE) == 0 && 549 dp->d_gone != NULL) 550 dp->d_gone(dp); 551 if (sc->sysctl_tree != NULL) { 552 sysctl_ctx_free(&sc->sysctl_ctx); 553 sc->sysctl_tree = NULL; 554 } 555 if (sc->led[0] != 0) { 556 led_set(sc->led, ""); 557 sc->led[0] = 0; 558 } 559 pp->private = NULL; 560 pp->geom->softc = NULL; 561 mtx_destroy(&sc->done_mtx); 562 g_free(sc); 563 } 564 565 static void 566 g_disk_destroy(void *ptr, int flag) 567 { 568 struct disk *dp; 569 struct g_geom *gp; 570 struct g_disk_softc *sc; 571 572 g_topology_assert(); 573 dp = ptr; 574 gp = dp->d_geom; 575 if (gp != NULL) { 576 sc = gp->softc; 577 if (sc != NULL) 578 sc->dp = NULL; 579 dp->d_geom = NULL; 580 g_wither_geom(gp, ENXIO); 581 } 582 g_free(dp); 583 } 584 585 /* 586 * We only allow printable characters in disk ident, 587 * the rest is converted to 'x<HH>'. 588 */ 589 static void 590 g_disk_ident_adjust(char *ident, size_t size) 591 { 592 char *p, tmp[4], newid[DISK_IDENT_SIZE]; 593 594 newid[0] = '\0'; 595 for (p = ident; *p != '\0'; p++) { 596 if (isprint(*p)) { 597 tmp[0] = *p; 598 tmp[1] = '\0'; 599 } else { 600 snprintf(tmp, sizeof(tmp), "x%02hhx", 601 *(unsigned char *)p); 602 } 603 if (strlcat(newid, tmp, sizeof(newid)) >= sizeof(newid)) 604 break; 605 } 606 bzero(ident, size); 607 strlcpy(ident, newid, size); 608 } 609 610 struct disk * 611 disk_alloc(void) 612 { 613 614 return (g_malloc(sizeof(struct disk), M_WAITOK | M_ZERO)); 615 } 616 617 void 618 disk_create(struct disk *dp, int version) 619 { 620 621 if (version != DISK_VERSION_03 && version != DISK_VERSION_02 && 622 version != DISK_VERSION_01) { 623 printf("WARNING: Attempt to add disk %s%d %s", 624 dp->d_name, dp->d_unit, 625 " using incompatible ABI version of disk(9)\n"); 626 printf("WARNING: Ignoring disk %s%d\n", 627 dp->d_name, dp->d_unit); 628 return; 629 } 630 if (version == DISK_VERSION_01) 631 dp->d_flags |= DISKFLAG_LACKS_GONE; 632 if (version < DISK_VERSION_03) 633 dp->d_flags |= DISKFLAG_LACKS_DELMAX; 634 KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy")); 635 KASSERT(dp->d_name != NULL, ("disk_create need d_name")); 636 KASSERT(*dp->d_name != 0, ("disk_create need d_name")); 637 KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long")); 638 if (dp->d_devstat == NULL) 639 dp->d_devstat = devstat_new_entry(dp->d_name, dp->d_unit, 640 dp->d_sectorsize, DEVSTAT_ALL_SUPPORTED, 641 DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX); 642 dp->d_geom = NULL; 643 g_disk_ident_adjust(dp->d_ident, sizeof(dp->d_ident)); 644 g_post_event(g_disk_create, dp, M_WAITOK, dp, NULL); 645 } 646 647 void 648 disk_destroy(struct disk *dp) 649 { 650 651 g_cancel_event(dp); 652 dp->d_destroyed = 1; 653 if (dp->d_devstat != NULL) 654 devstat_remove_entry(dp->d_devstat); 655 g_post_event(g_disk_destroy, dp, M_WAITOK, NULL); 656 } 657 658 void 659 disk_gone(struct disk *dp) 660 { 661 struct g_geom *gp; 662 struct g_provider *pp; 663 664 gp = dp->d_geom; 665 if (gp != NULL) { 666 pp = LIST_FIRST(&gp->provider); 667 if (pp != NULL) { 668 KASSERT(LIST_NEXT(pp, provider) == NULL, 669 ("geom %p has more than one provider", gp)); 670 g_wither_provider(pp, ENXIO); 671 } 672 } 673 } 674 675 void 676 disk_attr_changed(struct disk *dp, const char *attr, int flag) 677 { 678 struct g_geom *gp; 679 struct g_provider *pp; 680 681 gp = dp->d_geom; 682 if (gp != NULL) 683 LIST_FOREACH(pp, &gp->provider, provider) 684 (void)g_attr_changed(pp, attr, flag); 685 } 686 687 void 688 disk_media_changed(struct disk *dp, int flag) 689 { 690 struct g_geom *gp; 691 struct g_provider *pp; 692 693 gp = dp->d_geom; 694 if (gp != NULL) { 695 pp = LIST_FIRST(&gp->provider); 696 if (pp != NULL) { 697 KASSERT(LIST_NEXT(pp, provider) == NULL, 698 ("geom %p has more than one provider", gp)); 699 g_media_changed(pp, flag); 700 } 701 } 702 } 703 704 void 705 disk_media_gone(struct disk *dp, int flag) 706 { 707 struct g_geom *gp; 708 struct g_provider *pp; 709 710 gp = dp->d_geom; 711 if (gp != NULL) { 712 pp = LIST_FIRST(&gp->provider); 713 if (pp != NULL) { 714 KASSERT(LIST_NEXT(pp, provider) == NULL, 715 ("geom %p has more than one provider", gp)); 716 g_media_gone(pp, flag); 717 } 718 } 719 } 720 721 static void 722 g_kern_disks(void *p, int flag __unused) 723 { 724 struct sbuf *sb; 725 struct g_geom *gp; 726 char *sp; 727 728 sb = p; 729 sp = ""; 730 g_topology_assert(); 731 LIST_FOREACH(gp, &g_disk_class.geom, geom) { 732 sbuf_printf(sb, "%s%s", sp, gp->name); 733 sp = " "; 734 } 735 sbuf_finish(sb); 736 } 737 738 static int 739 sysctl_disks(SYSCTL_HANDLER_ARGS) 740 { 741 int error; 742 struct sbuf *sb; 743 744 sb = sbuf_new_auto(); 745 g_waitfor_event(g_kern_disks, sb, M_WAITOK, NULL); 746 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1); 747 sbuf_delete(sb); 748 return error; 749 } 750 751 SYSCTL_PROC(_kern, OID_AUTO, disks, 752 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 753 sysctl_disks, "A", "names of available disks");
Cache object: c8fd7da91b58b03397d781e1d6e13cc2
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]