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 61struct g_disk_softc { 62 struct mtx done_mtx; 63 struct disk *dp; 64 struct sysctl_ctx_list sysctl_ctx; 65 struct sysctl_oid *sysctl_tree; 66 char led[64]; 67 uint32_t state; 68 struct mtx start_mtx; 69}; 70 71static g_access_t g_disk_access; 72static g_start_t g_disk_start; 73static g_ioctl_t g_disk_ioctl; 74static g_dumpconf_t g_disk_dumpconf; 75static g_provgone_t g_disk_providergone; 76 77static struct g_class g_disk_class = { 78 .name = G_DISK_CLASS_NAME, 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 87SYSCTL_DECL(_kern_geom); 88static SYSCTL_NODE(_kern_geom, OID_AUTO, disk, CTLFLAG_RW, 0, 89 "GEOM_DISK stuff"); 90 91DECLARE_GEOM_CLASS(g_disk_class, g_disk); 92 93static void __inline 94g_disk_lock_giant(struct disk *dp) 95{ 96 97 if (dp->d_flags & DISKFLAG_NEEDSGIANT) 98 mtx_lock(&Giant); 99} 100 101static void __inline 102g_disk_unlock_giant(struct disk *dp) 103{ 104 105 if (dp->d_flags & DISKFLAG_NEEDSGIANT) 106 mtx_unlock(&Giant); 107} 108 109static int 110g_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_maxsize == 0) { 147 printf("WARNING: Disk drive %s%d has no d_maxsize\n", 148 dp->d_name, dp->d_unit); 149 dp->d_maxsize = DFLTPHYS; 150 } 151 if (dp->d_delmaxsize == 0) { 152 if (bootverbose && dp->d_flags & DISKFLAG_CANDELETE) { 153 printf("WARNING: Disk drive %s%d has no " 154 "d_delmaxsize\n", dp->d_name, dp->d_unit); 155 } 156 dp->d_delmaxsize = dp->d_maxsize; 157 } 158 pp->stripeoffset = dp->d_stripeoffset; 159 pp->stripesize = dp->d_stripesize; 160 dp->d_flags |= DISKFLAG_OPEN; 161 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) { 162 if (dp->d_close != NULL) { 163 g_disk_lock_giant(dp); 164 error = dp->d_close(dp); 165 if (error != 0) 166 printf("Closed disk %s -> %d\n", 167 pp->name, error); 168 g_disk_unlock_giant(dp); 169 } 170 sc->state = G_STATE_ACTIVE; 171 if (sc->led[0] != 0) 172 led_set(sc->led, "0"); 173 dp->d_flags &= ~DISKFLAG_OPEN; 174 } 175 return (error); 176} 177 178static void 179g_disk_kerneldump(struct bio *bp, struct disk *dp) 180{ 181 struct g_kerneldump *gkd; 182 struct g_geom *gp; 183 184 gkd = (struct g_kerneldump*)bp->bio_data; 185 gp = bp->bio_to->geom; 186 g_trace(G_T_TOPOLOGY, "g_disk_kerneldump(%s, %jd, %jd)", 187 gp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length); 188 if (dp->d_dump == NULL) { 189 g_io_deliver(bp, ENODEV); 190 return; 191 } 192 gkd->di.dumper = dp->d_dump; 193 gkd->di.priv = dp; 194 gkd->di.blocksize = dp->d_sectorsize; 195 gkd->di.maxiosize = dp->d_maxsize; 196 gkd->di.mediaoffset = gkd->offset; 197 if ((gkd->offset + gkd->length) > dp->d_mediasize) 198 gkd->length = dp->d_mediasize - gkd->offset; 199 gkd->di.mediasize = gkd->length; 200 g_io_deliver(bp, 0); 201} 202 203static void 204g_disk_setstate(struct bio *bp, struct g_disk_softc *sc) 205{ 206 const char *cmd; 207 208 memcpy(&sc->state, bp->bio_data, sizeof(sc->state)); 209 if (sc->led[0] != 0) { 210 switch (sc->state) { 211 case G_STATE_FAILED: 212 cmd = "1"; 213 break; 214 case G_STATE_REBUILD: 215 cmd = "f5"; 216 break; 217 case G_STATE_RESYNC: 218 cmd = "f1"; 219 break; 220 default: 221 cmd = "0"; 222 break; 223 } 224 led_set(sc->led, cmd); 225 } 226 g_io_deliver(bp, 0); 227} 228 229static void 230g_disk_done(struct bio *bp) 231{ 232 struct bintime now; 233 struct bio *bp2; 234 struct g_disk_softc *sc; 235 236 /* See "notes" for why we need a mutex here */ 237 /* XXX: will witness accept a mix of Giant/unGiant drivers here ? */ 238 bp2 = bp->bio_parent; 239 sc = bp2->bio_to->private; 240 bp->bio_completed = bp->bio_length - bp->bio_resid; 241 binuptime(&now); 242 mtx_lock(&sc->done_mtx); 243 if (bp2->bio_error == 0) 244 bp2->bio_error = bp->bio_error; 245 bp2->bio_completed += bp->bio_completed; 246 if ((bp->bio_cmd & (BIO_READ|BIO_WRITE|BIO_DELETE|BIO_FLUSH)) != 0) 247 devstat_end_transaction_bio_bt(sc->dp->d_devstat, bp, &now); 248 bp2->bio_inbed++; 249 if (bp2->bio_children == bp2->bio_inbed) { 250 mtx_unlock(&sc->done_mtx); 251 bp2->bio_resid = bp2->bio_bcount - bp2->bio_completed; 252 g_io_deliver(bp2, bp2->bio_error); 253 } else 254 mtx_unlock(&sc->done_mtx); 255 g_destroy_bio(bp); 256} 257 258static int 259g_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 g_disk_lock_giant(dp); 271 error = dp->d_ioctl(dp, cmd, data, fflag, td); 272 g_disk_unlock_giant(dp); 273 return (error); 274} 275 276static void 277g_disk_start(struct bio *bp) 278{ 279 struct bio *bp2, *bp3; 280 struct disk *dp; 281 struct g_disk_softc *sc; 282 int error; 283 off_t off; 284 285 sc = bp->bio_to->private; 286 if (sc == NULL || (dp = sc->dp) == NULL || dp->d_destroyed) { 287 g_io_deliver(bp, ENXIO); 288 return; 289 } 290 error = EJUSTRETURN; 291 switch(bp->bio_cmd) { 292 case BIO_DELETE: 293 if (!(dp->d_flags & DISKFLAG_CANDELETE)) { 294 error = EOPNOTSUPP; 295 break; 296 } 297 /* fall-through */ 298 case BIO_READ: 299 case BIO_WRITE: 300 off = 0; 301 bp3 = NULL; 302 bp2 = g_clone_bio(bp); 303 if (bp2 == NULL) { 304 error = ENOMEM; 305 break; 306 } 307 do { 308 off_t d_maxsize; 309 310 d_maxsize = (bp->bio_cmd == BIO_DELETE) ? 311 dp->d_delmaxsize : dp->d_maxsize; 312 bp2->bio_offset += off; 313 bp2->bio_length -= off; 314 if ((bp->bio_flags & BIO_UNMAPPED) == 0) { 315 bp2->bio_data += off; 316 } else { 317 KASSERT((dp->d_flags & DISKFLAG_UNMAPPED_BIO) 318 != 0, 319 ("unmapped bio not supported by disk %s", 320 dp->d_name)); 321 bp2->bio_ma += off / PAGE_SIZE; 322 bp2->bio_ma_offset += off; 323 bp2->bio_ma_offset %= PAGE_SIZE; 324 bp2->bio_ma_n -= off / PAGE_SIZE; 325 } 326 if (bp2->bio_length > d_maxsize) { 327 /* 328 * XXX: If we have a stripesize we should really 329 * use it here. Care should be taken in the delete 330 * case if this is done as deletes can be very 331 * sensitive to size given how they are processed. 332 */ 333 bp2->bio_length = d_maxsize; 334 if ((bp->bio_flags & BIO_UNMAPPED) != 0) { 335 bp2->bio_ma_n = howmany( 336 bp2->bio_ma_offset + 337 bp2->bio_length, PAGE_SIZE); 338 } 339 off += d_maxsize; 340 /* 341 * To avoid a race, we need to grab the next bio 342 * before we schedule this one. See "notes". 343 */ 344 bp3 = g_clone_bio(bp); 345 if (bp3 == NULL) 346 bp->bio_error = ENOMEM; 347 } 348 bp2->bio_done = g_disk_done; 349 bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize; 350 bp2->bio_bcount = bp2->bio_length; 351 bp2->bio_disk = dp; 352 mtx_lock(&sc->start_mtx); 353 devstat_start_transaction_bio(dp->d_devstat, bp2); 354 mtx_unlock(&sc->start_mtx); 355 g_disk_lock_giant(dp); 356 dp->d_strategy(bp2); 357 g_disk_unlock_giant(dp); 358 bp2 = bp3; 359 bp3 = NULL; 360 } while (bp2 != NULL); 361 break; 362 case BIO_GETATTR: 363 /* Give the driver a chance to override */ 364 if (dp->d_getattr != NULL) { 365 if (bp->bio_disk == NULL) 366 bp->bio_disk = dp; 367 error = dp->d_getattr(bp); 368 if (error != -1) 369 break; 370 error = EJUSTRETURN; 371 } 372 if (g_handleattr_int(bp, "GEOM::candelete", 373 (dp->d_flags & DISKFLAG_CANDELETE) != 0)) 374 break; 375 else if (g_handleattr_int(bp, "GEOM::fwsectors", 376 dp->d_fwsectors)) 377 break; 378 else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads)) 379 break; 380 else if (g_handleattr_off_t(bp, "GEOM::frontstuff", 0)) 381 break; 382 else if (g_handleattr_str(bp, "GEOM::ident", dp->d_ident)) 383 break; 384 else if (g_handleattr_uint16_t(bp, "GEOM::hba_vendor", 385 dp->d_hba_vendor)) 386 break; 387 else if (g_handleattr_uint16_t(bp, "GEOM::hba_device", 388 dp->d_hba_device)) 389 break; 390 else if (g_handleattr_uint16_t(bp, "GEOM::hba_subvendor", 391 dp->d_hba_subvendor)) 392 break; 393 else if (g_handleattr_uint16_t(bp, "GEOM::hba_subdevice", 394 dp->d_hba_subdevice)) 395 break; 396 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump")) 397 g_disk_kerneldump(bp, dp); 398 else if (!strcmp(bp->bio_attribute, "GEOM::setstate")) 399 g_disk_setstate(bp, sc); 400 else if (!strcmp(bp->bio_attribute, "GEOM::rotation_rate")) { 401 uint64_t v; 402 403 if ((dp->d_flags & DISKFLAG_LACKS_ROTRATE) == 0) 404 v = dp->d_rotation_rate; 405 else 406 v = 0; /* rate unknown */ 407 g_handleattr_uint16_t(bp, "GEOM::rotation_rate", v); 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 bp2 = g_clone_bio(bp); 420 if (bp2 == NULL) { 421 g_io_deliver(bp, ENOMEM); 422 return; 423 } 424 bp2->bio_done = g_disk_done; 425 bp2->bio_disk = dp; 426 mtx_lock(&sc->start_mtx); 427 devstat_start_transaction_bio(dp->d_devstat, bp2); 428 mtx_unlock(&sc->start_mtx); 429 g_disk_lock_giant(dp); 430 dp->d_strategy(bp2); 431 g_disk_unlock_giant(dp); 432 break; 433 default: 434 error = EOPNOTSUPP; 435 break; 436 } 437 if (error != EJUSTRETURN) 438 g_io_deliver(bp, error); 439 return; 440} 441 442static void 443g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp) 444{ 445 struct bio *bp; 446 struct disk *dp; 447 struct g_disk_softc *sc; 448 char *buf; 449 int res = 0; 450 451 sc = gp->softc; 452 if (sc == NULL || (dp = sc->dp) == NULL) 453 return; 454 if (indent == NULL) { 455 sbuf_printf(sb, " hd %u", dp->d_fwheads); 456 sbuf_printf(sb, " sc %u", dp->d_fwsectors); 457 return; 458 } 459 if (pp != NULL) { 460 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n", 461 indent, dp->d_fwheads); 462 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n", 463 indent, dp->d_fwsectors); 464 if (dp->d_getattr != NULL) { 465 buf = g_malloc(DISK_IDENT_SIZE, M_WAITOK); 466 bp = g_alloc_bio(); 467 bp->bio_disk = dp; 468 bp->bio_attribute = "GEOM::ident"; 469 bp->bio_length = DISK_IDENT_SIZE; 470 bp->bio_data = buf; 471 res = dp->d_getattr(bp); 472 sbuf_printf(sb, "%s<ident>", indent); 473 g_conf_printf_escaped(sb, "%s", 474 res == 0 ? buf: dp->d_ident); 475 sbuf_printf(sb, "</ident>\n"); 476 bp->bio_attribute = "GEOM::lunid"; 477 bp->bio_length = DISK_IDENT_SIZE; 478 bp->bio_data = buf; 479 if (dp->d_getattr(bp) == 0) { 480 sbuf_printf(sb, "%s<lunid>", indent); 481 g_conf_printf_escaped(sb, "%s", buf); 482 sbuf_printf(sb, "</lunid>\n"); 483 } 484 bp->bio_attribute = "GEOM::lunname"; 485 bp->bio_length = DISK_IDENT_SIZE; 486 bp->bio_data = buf; 487 if (dp->d_getattr(bp) == 0) { 488 sbuf_printf(sb, "%s<lunname>", indent); 489 g_conf_printf_escaped(sb, "%s", buf); 490 sbuf_printf(sb, "</lunname>\n"); 491 } 492 g_destroy_bio(bp); 493 g_free(buf); 494 } else { 495 sbuf_printf(sb, "%s<ident>", indent); 496 g_conf_printf_escaped(sb, "%s", dp->d_ident); 497 sbuf_printf(sb, "</ident>\n"); 498 } 499 sbuf_printf(sb, "%s<descr>", indent); 500 g_conf_printf_escaped(sb, "%s", dp->d_descr); 501 sbuf_printf(sb, "</descr>\n"); 502 } 503} 504 505static void 506g_disk_resize(void *ptr, int flag) 507{ 508 struct disk *dp; 509 struct g_geom *gp; 510 struct g_provider *pp; 511 512 if (flag == EV_CANCEL) 513 return; 514 g_topology_assert(); 515 516 dp = ptr; 517 gp = dp->d_geom; 518 519 if (dp->d_destroyed || gp == NULL) 520 return; 521 522 LIST_FOREACH(pp, &gp->provider, provider) { 523 if (pp->sectorsize != 0 && 524 pp->sectorsize != dp->d_sectorsize) 525 g_wither_provider(pp, ENXIO); 526 else 527 g_resize_provider(pp, dp->d_mediasize); 528 } 529} 530 531static void 532g_disk_create(void *arg, int flag) 533{ 534 struct g_geom *gp; 535 struct g_provider *pp; 536 struct disk *dp; 537 struct g_disk_softc *sc; 538 char tmpstr[80]; 539 540 if (flag == EV_CANCEL) 541 return; 542 g_topology_assert(); 543 dp = arg; 544 sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO); 545 mtx_init(&sc->start_mtx, "g_disk_start", NULL, MTX_DEF); 546 mtx_init(&sc->done_mtx, "g_disk_done", NULL, MTX_DEF); 547 sc->dp = dp; 548 gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit); 549 gp->softc = sc; 550 pp = g_new_providerf(gp, "%s", gp->name); 551 devstat_remove_entry(pp->stat); 552 pp->stat = NULL; 553 dp->d_devstat->id = pp; 554 pp->mediasize = dp->d_mediasize; 555 pp->sectorsize = dp->d_sectorsize; 556 pp->stripeoffset = dp->d_stripeoffset; 557 pp->stripesize = dp->d_stripesize; 558 if ((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0) 559 pp->flags |= G_PF_ACCEPT_UNMAPPED; 560 if ((dp->d_flags & DISKFLAG_DIRECT_COMPLETION) != 0) 561 pp->flags |= G_PF_DIRECT_SEND; 562 pp->flags |= G_PF_DIRECT_RECEIVE; 563 if (bootverbose) 564 printf("GEOM: new disk %s\n", gp->name); 565 sysctl_ctx_init(&sc->sysctl_ctx); 566 snprintf(tmpstr, sizeof(tmpstr), "GEOM disk %s", gp->name); 567 sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx, 568 SYSCTL_STATIC_CHILDREN(_kern_geom_disk), OID_AUTO, gp->name, 569 CTLFLAG_RD, 0, tmpstr); 570 if (sc->sysctl_tree != NULL) { 571 snprintf(tmpstr, sizeof(tmpstr), 572 "kern.geom.disk.%s.led", gp->name); 573 TUNABLE_STR_FETCH(tmpstr, sc->led, sizeof(sc->led)); 574 SYSCTL_ADD_STRING(&sc->sysctl_ctx, 575 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "led", 576 CTLFLAG_RW | CTLFLAG_TUN, sc->led, sizeof(sc->led), 577 "LED name"); 578 } 579 pp->private = sc; 580 dp->d_geom = gp; 581 g_error_provider(pp, 0); 582} 583 584/* 585 * We get this callback after all of the consumers have gone away, and just 586 * before the provider is freed. If the disk driver provided a d_gone 587 * callback, let them know that it is okay to free resources -- they won't 588 * be getting any more accesses from GEOM. 589 */ 590static void 591g_disk_providergone(struct g_provider *pp) 592{ 593 struct disk *dp; 594 struct g_disk_softc *sc; 595 596 sc = (struct g_disk_softc *)pp->private; 597 dp = sc->dp; 598 if (dp != NULL && dp->d_gone != NULL) 599 dp->d_gone(dp); 600 if (sc->sysctl_tree != NULL) { 601 sysctl_ctx_free(&sc->sysctl_ctx); 602 sc->sysctl_tree = NULL; 603 } 604 if (sc->led[0] != 0) { 605 led_set(sc->led, "0"); 606 sc->led[0] = 0; 607 } 608 pp->private = NULL; 609 pp->geom->softc = NULL; 610 mtx_destroy(&sc->done_mtx); 611 mtx_destroy(&sc->start_mtx); 612 g_free(sc); 613} 614 615static void 616g_disk_destroy(void *ptr, int flag) 617{ 618 struct disk *dp; 619 struct g_geom *gp; 620 struct g_disk_softc *sc; 621 622 g_topology_assert(); 623 dp = ptr; 624 gp = dp->d_geom; 625 if (gp != NULL) { 626 sc = gp->softc; 627 if (sc != NULL) 628 sc->dp = NULL; 629 dp->d_geom = NULL; 630 g_wither_geom(gp, ENXIO); 631 } 632 g_free(dp); 633} 634 635/* 636 * We only allow printable characters in disk ident, 637 * the rest is converted to 'x<HH>'. 638 */ 639static void 640g_disk_ident_adjust(char *ident, size_t size) 641{ 642 char *p, tmp[4], newid[DISK_IDENT_SIZE]; 643 644 newid[0] = '\0'; 645 for (p = ident; *p != '\0'; p++) { 646 if (isprint(*p)) { 647 tmp[0] = *p; 648 tmp[1] = '\0'; 649 } else { 650 snprintf(tmp, sizeof(tmp), "x%02hhx", 651 *(unsigned char *)p); 652 } 653 if (strlcat(newid, tmp, sizeof(newid)) >= sizeof(newid)) 654 break; 655 } 656 bzero(ident, size); 657 strlcpy(ident, newid, size); 658} 659 660struct disk * 661disk_alloc(void) 662{ 663 664 return (g_malloc(sizeof(struct disk), M_WAITOK | M_ZERO)); 665} 666 667void 668disk_create(struct disk *dp, int version) 669{ 670 671 if (version != DISK_VERSION) { 672 printf("WARNING: Attempt to add disk %s%d %s", 673 dp->d_name, dp->d_unit, 674 " using incompatible ABI version of disk(9)\n"); 675 printf("WARNING: Ignoring disk %s%d\n", 676 dp->d_name, dp->d_unit); 677 return; 678 } 679 if (version < DISK_VERSION_04) 680 dp->d_flags |= DISKFLAG_LACKS_ROTRATE; 681 KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy")); 682 KASSERT(dp->d_name != NULL, ("disk_create need d_name")); 683 KASSERT(*dp->d_name != 0, ("disk_create need d_name")); 684 KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long")); 685 if (dp->d_devstat == NULL) 686 dp->d_devstat = devstat_new_entry(dp->d_name, dp->d_unit, 687 dp->d_sectorsize, DEVSTAT_ALL_SUPPORTED, 688 DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX); 689 dp->d_geom = NULL; 690 g_disk_ident_adjust(dp->d_ident, sizeof(dp->d_ident)); 691 g_post_event(g_disk_create, dp, M_WAITOK, dp, NULL); 692} 693 694void 695disk_destroy(struct disk *dp) 696{ 697 698 g_cancel_event(dp); 699 dp->d_destroyed = 1; 700 if (dp->d_devstat != NULL) 701 devstat_remove_entry(dp->d_devstat); 702 g_post_event(g_disk_destroy, dp, M_WAITOK, NULL); 703} 704 705void 706disk_gone(struct disk *dp) 707{ 708 struct g_geom *gp; 709 struct g_provider *pp; 710 711 gp = dp->d_geom; 712 if (gp != NULL) { 713 pp = LIST_FIRST(&gp->provider); 714 if (pp != NULL) { 715 KASSERT(LIST_NEXT(pp, provider) == NULL, 716 ("geom %p has more than one provider", gp)); 717 g_wither_provider(pp, ENXIO); 718 } 719 } 720} 721 722void 723disk_attr_changed(struct disk *dp, const char *attr, int flag) 724{ 725 struct g_geom *gp; 726 struct g_provider *pp; 727 728 gp = dp->d_geom; 729 if (gp != NULL) 730 LIST_FOREACH(pp, &gp->provider, provider) 731 (void)g_attr_changed(pp, attr, flag); 732} 733 734void 735disk_media_changed(struct disk *dp, int flag) 736{ 737 struct g_geom *gp; 738 struct g_provider *pp; 739 740 gp = dp->d_geom; 741 if (gp != NULL) { 742 pp = LIST_FIRST(&gp->provider); 743 if (pp != NULL) { 744 KASSERT(LIST_NEXT(pp, provider) == NULL, 745 ("geom %p has more than one provider", gp)); 746 g_media_changed(pp, flag); 747 } 748 } 749} 750 751void 752disk_media_gone(struct disk *dp, int flag) 753{ 754 struct g_geom *gp; 755 struct g_provider *pp; 756 757 gp = dp->d_geom; 758 if (gp != NULL) { 759 pp = LIST_FIRST(&gp->provider); 760 if (pp != NULL) { 761 KASSERT(LIST_NEXT(pp, provider) == NULL, 762 ("geom %p has more than one provider", gp)); 763 g_media_gone(pp, flag); 764 } 765 } 766} 767 768int 769disk_resize(struct disk *dp, int flag) 770{ 771 772 if (dp->d_destroyed || dp->d_geom == NULL) 773 return (0); 774 775 return (g_post_event(g_disk_resize, dp, flag, NULL)); 776} 777 778static void 779g_kern_disks(void *p, int flag __unused) 780{ 781 struct sbuf *sb; 782 struct g_geom *gp; 783 char *sp; 784 785 sb = p; 786 sp = ""; 787 g_topology_assert(); 788 LIST_FOREACH(gp, &g_disk_class.geom, geom) { 789 sbuf_printf(sb, "%s%s", sp, gp->name); 790 sp = " "; 791 } 792 sbuf_finish(sb); 793} 794 795static int 796sysctl_disks(SYSCTL_HANDLER_ARGS) 797{ 798 int error; 799 struct sbuf *sb; 800 801 sb = sbuf_new_auto(); 802 g_waitfor_event(g_kern_disks, sb, M_WAITOK, NULL); 803 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1); 804 sbuf_delete(sb); 805 return error; 806} 807 808SYSCTL_PROC(_kern, OID_AUTO, disks, 809 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 810 sysctl_disks, "A", "names of available disks"); 811