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/shsec/g_shsec.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) 2005 Pawel Jakub Dawidek <pjd@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/kernel.h> 33 #include <sys/module.h> 34 #include <sys/lock.h> 35 #include <sys/mutex.h> 36 #include <sys/bio.h> 37 #include <sys/sysctl.h> 38 #include <sys/malloc.h> 39 #include <vm/uma.h> 40 #include <geom/geom.h> 41 #include <geom/shsec/g_shsec.h> 42 43 44 static MALLOC_DEFINE(M_SHSEC, "shsec data", "GEOM_SHSEC Data"); 45 46 static uma_zone_t g_shsec_zone; 47 48 static int g_shsec_destroy(struct g_shsec_softc *sc, boolean_t force); 49 static int g_shsec_destroy_geom(struct gctl_req *req, struct g_class *mp, 50 struct g_geom *gp); 51 52 static g_taste_t g_shsec_taste; 53 static g_ctl_req_t g_shsec_config; 54 static g_dumpconf_t g_shsec_dumpconf; 55 static g_init_t g_shsec_init; 56 static g_fini_t g_shsec_fini; 57 58 struct g_class g_shsec_class = { 59 .name = G_SHSEC_CLASS_NAME, 60 .version = G_VERSION, 61 .ctlreq = g_shsec_config, 62 .taste = g_shsec_taste, 63 .destroy_geom = g_shsec_destroy_geom, 64 .init = g_shsec_init, 65 .fini = g_shsec_fini 66 }; 67 68 SYSCTL_DECL(_kern_geom); 69 SYSCTL_NODE(_kern_geom, OID_AUTO, shsec, CTLFLAG_RW, 0, "GEOM_SHSEC stuff"); 70 static u_int g_shsec_debug = 0; 71 TUNABLE_INT("kern.geom.shsec.debug", &g_shsec_debug); 72 SYSCTL_UINT(_kern_geom_shsec, OID_AUTO, debug, CTLFLAG_RW, &g_shsec_debug, 0, 73 "Debug level"); 74 static u_int g_shsec_maxmem = MAXPHYS * 100; 75 TUNABLE_INT("kern.geom.shsec.maxmem", &g_shsec_maxmem); 76 SYSCTL_UINT(_kern_geom_shsec, OID_AUTO, maxmem, CTLFLAG_RD, &g_shsec_maxmem, 77 0, "Maximum memory that can be allocated for I/O (in bytes)"); 78 static u_int g_shsec_alloc_failed = 0; 79 SYSCTL_UINT(_kern_geom_shsec, OID_AUTO, alloc_failed, CTLFLAG_RD, 80 &g_shsec_alloc_failed, 0, "How many times I/O allocation failed"); 81 82 /* 83 * Greatest Common Divisor. 84 */ 85 static u_int 86 gcd(u_int a, u_int b) 87 { 88 u_int c; 89 90 while (b != 0) { 91 c = a; 92 a = b; 93 b = (c % b); 94 } 95 return (a); 96 } 97 98 /* 99 * Least Common Multiple. 100 */ 101 static u_int 102 lcm(u_int a, u_int b) 103 { 104 105 return ((a * b) / gcd(a, b)); 106 } 107 108 static void 109 g_shsec_init(struct g_class *mp __unused) 110 { 111 112 g_shsec_zone = uma_zcreate("g_shsec_zone", MAXPHYS, NULL, NULL, NULL, 113 NULL, 0, 0); 114 g_shsec_maxmem -= g_shsec_maxmem % MAXPHYS; 115 uma_zone_set_max(g_shsec_zone, g_shsec_maxmem / MAXPHYS); 116 } 117 118 static void 119 g_shsec_fini(struct g_class *mp __unused) 120 { 121 122 uma_zdestroy(g_shsec_zone); 123 } 124 125 /* 126 * Return the number of valid disks. 127 */ 128 static u_int 129 g_shsec_nvalid(struct g_shsec_softc *sc) 130 { 131 u_int i, no; 132 133 no = 0; 134 for (i = 0; i < sc->sc_ndisks; i++) { 135 if (sc->sc_disks[i] != NULL) 136 no++; 137 } 138 139 return (no); 140 } 141 142 static void 143 g_shsec_remove_disk(struct g_consumer *cp) 144 { 145 struct g_shsec_softc *sc; 146 u_int no; 147 148 KASSERT(cp != NULL, ("Non-valid disk in %s.", __func__)); 149 sc = (struct g_shsec_softc *)cp->private; 150 KASSERT(sc != NULL, ("NULL sc in %s.", __func__)); 151 no = cp->index; 152 153 G_SHSEC_DEBUG(0, "Disk %s removed from %s.", cp->provider->name, 154 sc->sc_name); 155 156 sc->sc_disks[no] = NULL; 157 if (sc->sc_provider != NULL) { 158 g_orphan_provider(sc->sc_provider, ENXIO); 159 sc->sc_provider = NULL; 160 G_SHSEC_DEBUG(0, "Device %s removed.", sc->sc_name); 161 } 162 163 if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0) 164 g_access(cp, -cp->acr, -cp->acw, -cp->ace); 165 g_detach(cp); 166 g_destroy_consumer(cp); 167 } 168 169 static void 170 g_shsec_orphan(struct g_consumer *cp) 171 { 172 struct g_shsec_softc *sc; 173 struct g_geom *gp; 174 175 g_topology_assert(); 176 gp = cp->geom; 177 sc = gp->softc; 178 if (sc == NULL) 179 return; 180 181 g_shsec_remove_disk(cp); 182 /* If there are no valid disks anymore, remove device. */ 183 if (g_shsec_nvalid(sc) == 0) 184 g_shsec_destroy(sc, 1); 185 } 186 187 static int 188 g_shsec_access(struct g_provider *pp, int dr, int dw, int de) 189 { 190 struct g_consumer *cp1, *cp2; 191 struct g_shsec_softc *sc; 192 struct g_geom *gp; 193 int error; 194 195 gp = pp->geom; 196 sc = gp->softc; 197 198 if (sc == NULL) { 199 /* 200 * It looks like geom is being withered. 201 * In that case we allow only negative requests. 202 */ 203 KASSERT(dr <= 0 && dw <= 0 && de <= 0, 204 ("Positive access request (device=%s).", pp->name)); 205 if ((pp->acr + dr) == 0 && (pp->acw + dw) == 0 && 206 (pp->ace + de) == 0) { 207 G_SHSEC_DEBUG(0, "Device %s definitely destroyed.", 208 gp->name); 209 } 210 return (0); 211 } 212 213 /* On first open, grab an extra "exclusive" bit */ 214 if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0) 215 de++; 216 /* ... and let go of it on last close */ 217 if ((pp->acr + dr) == 0 && (pp->acw + dw) == 0 && (pp->ace + de) == 0) 218 de--; 219 220 error = ENXIO; 221 LIST_FOREACH(cp1, &gp->consumer, consumer) { 222 error = g_access(cp1, dr, dw, de); 223 if (error == 0) 224 continue; 225 /* 226 * If we fail here, backout all previous changes. 227 */ 228 LIST_FOREACH(cp2, &gp->consumer, consumer) { 229 if (cp1 == cp2) 230 return (error); 231 g_access(cp2, -dr, -dw, -de); 232 } 233 /* NOTREACHED */ 234 } 235 236 return (error); 237 } 238 239 static void 240 g_shsec_xor1(uint32_t *src, uint32_t *dst, ssize_t len) 241 { 242 243 for (; len > 0; len -= sizeof(uint32_t), dst++) 244 *dst = *dst ^ *src++; 245 KASSERT(len == 0, ("len != 0 (len=%zd)", len)); 246 } 247 248 static void 249 g_shsec_done(struct bio *bp) 250 { 251 struct g_shsec_softc *sc; 252 struct bio *pbp; 253 254 pbp = bp->bio_parent; 255 sc = pbp->bio_to->geom->softc; 256 if (bp->bio_error == 0) 257 G_SHSEC_LOGREQ(2, bp, "Request done."); 258 else { 259 G_SHSEC_LOGREQ(0, bp, "Request failed (error=%d).", 260 bp->bio_error); 261 if (pbp->bio_error == 0) 262 pbp->bio_error = bp->bio_error; 263 } 264 if (pbp->bio_cmd == BIO_READ) { 265 if ((pbp->bio_pflags & G_SHSEC_BFLAG_FIRST) != 0) { 266 bcopy(bp->bio_data, pbp->bio_data, pbp->bio_length); 267 pbp->bio_pflags = 0; 268 } else { 269 g_shsec_xor1((uint32_t *)bp->bio_data, 270 (uint32_t *)pbp->bio_data, 271 (ssize_t)pbp->bio_length); 272 } 273 } 274 bzero(bp->bio_data, bp->bio_length); 275 uma_zfree(g_shsec_zone, bp->bio_data); 276 g_destroy_bio(bp); 277 pbp->bio_inbed++; 278 if (pbp->bio_children == pbp->bio_inbed) { 279 pbp->bio_completed = pbp->bio_length; 280 g_io_deliver(pbp, pbp->bio_error); 281 } 282 } 283 284 static void 285 g_shsec_xor2(uint32_t *rand, uint32_t *dst, ssize_t len) 286 { 287 288 for (; len > 0; len -= sizeof(uint32_t), dst++) { 289 *rand = arc4random(); 290 *dst = *dst ^ *rand++; 291 } 292 KASSERT(len == 0, ("len != 0 (len=%zd)", len)); 293 } 294 295 static void 296 g_shsec_start(struct bio *bp) 297 { 298 TAILQ_HEAD(, bio) queue = TAILQ_HEAD_INITIALIZER(queue); 299 struct g_shsec_softc *sc; 300 struct bio *cbp; 301 uint32_t *dst; 302 ssize_t len; 303 u_int no; 304 int error; 305 306 sc = bp->bio_to->geom->softc; 307 /* 308 * If sc == NULL, provider's error should be set and g_shsec_start() 309 * should not be called at all. 310 */ 311 KASSERT(sc != NULL, 312 ("Provider's error should be set (error=%d)(device=%s).", 313 bp->bio_to->error, bp->bio_to->name)); 314 315 G_SHSEC_LOGREQ(2, bp, "Request received."); 316 317 switch (bp->bio_cmd) { 318 case BIO_READ: 319 case BIO_WRITE: 320 /* 321 * Only those requests are supported. 322 */ 323 break; 324 case BIO_DELETE: 325 case BIO_GETATTR: 326 /* To which provider it should be delivered? */ 327 default: 328 g_io_deliver(bp, EOPNOTSUPP); 329 return; 330 } 331 332 /* 333 * Allocate all bios first and calculate XOR. 334 */ 335 dst = NULL; 336 len = bp->bio_length; 337 if (bp->bio_cmd == BIO_READ) 338 bp->bio_pflags = G_SHSEC_BFLAG_FIRST; 339 for (no = 0; no < sc->sc_ndisks; no++) { 340 cbp = g_clone_bio(bp); 341 if (cbp == NULL) { 342 error = ENOMEM; 343 goto failure; 344 } 345 TAILQ_INSERT_TAIL(&queue, cbp, bio_queue); 346 347 /* 348 * Fill in the component buf structure. 349 */ 350 cbp->bio_done = g_shsec_done; 351 cbp->bio_data = uma_zalloc(g_shsec_zone, M_NOWAIT); 352 if (cbp->bio_data == NULL) { 353 g_shsec_alloc_failed++; 354 error = ENOMEM; 355 goto failure; 356 } 357 cbp->bio_caller2 = sc->sc_disks[no]; 358 if (bp->bio_cmd == BIO_WRITE) { 359 if (no == 0) { 360 dst = (uint32_t *)cbp->bio_data; 361 bcopy(bp->bio_data, dst, len); 362 } else { 363 g_shsec_xor2((uint32_t *)cbp->bio_data, dst, 364 len); 365 } 366 } 367 } 368 /* 369 * Fire off all allocated requests! 370 */ 371 while ((cbp = TAILQ_FIRST(&queue)) != NULL) { 372 struct g_consumer *cp; 373 374 TAILQ_REMOVE(&queue, cbp, bio_queue); 375 cp = cbp->bio_caller2; 376 cbp->bio_caller2 = NULL; 377 cbp->bio_to = cp->provider; 378 G_SHSEC_LOGREQ(2, cbp, "Sending request."); 379 g_io_request(cbp, cp); 380 } 381 return; 382 failure: 383 while ((cbp = TAILQ_FIRST(&queue)) != NULL) { 384 TAILQ_REMOVE(&queue, cbp, bio_queue); 385 bp->bio_children--; 386 if (cbp->bio_data != NULL) { 387 bzero(cbp->bio_data, cbp->bio_length); 388 uma_zfree(g_shsec_zone, cbp->bio_data); 389 } 390 g_destroy_bio(cbp); 391 } 392 if (bp->bio_error == 0) 393 bp->bio_error = error; 394 g_io_deliver(bp, bp->bio_error); 395 } 396 397 static void 398 g_shsec_check_and_run(struct g_shsec_softc *sc) 399 { 400 off_t mediasize, ms; 401 u_int no, sectorsize = 0; 402 403 if (g_shsec_nvalid(sc) != sc->sc_ndisks) 404 return; 405 406 sc->sc_provider = g_new_providerf(sc->sc_geom, "shsec/%s", sc->sc_name); 407 /* 408 * Find the smallest disk. 409 */ 410 mediasize = sc->sc_disks[0]->provider->mediasize; 411 mediasize -= sc->sc_disks[0]->provider->sectorsize; 412 sectorsize = sc->sc_disks[0]->provider->sectorsize; 413 for (no = 1; no < sc->sc_ndisks; no++) { 414 ms = sc->sc_disks[no]->provider->mediasize; 415 ms -= sc->sc_disks[no]->provider->sectorsize; 416 if (ms < mediasize) 417 mediasize = ms; 418 sectorsize = lcm(sectorsize, 419 sc->sc_disks[no]->provider->sectorsize); 420 } 421 sc->sc_provider->sectorsize = sectorsize; 422 sc->sc_provider->mediasize = mediasize; 423 g_error_provider(sc->sc_provider, 0); 424 425 G_SHSEC_DEBUG(0, "Device %s activated.", sc->sc_name); 426 } 427 428 static int 429 g_shsec_read_metadata(struct g_consumer *cp, struct g_shsec_metadata *md) 430 { 431 struct g_provider *pp; 432 u_char *buf; 433 int error; 434 435 g_topology_assert(); 436 437 error = g_access(cp, 1, 0, 0); 438 if (error != 0) 439 return (error); 440 pp = cp->provider; 441 g_topology_unlock(); 442 buf = g_read_data(cp, pp->mediasize - pp->sectorsize, pp->sectorsize, 443 &error); 444 g_topology_lock(); 445 g_access(cp, -1, 0, 0); 446 if (buf == NULL) 447 return (error); 448 449 /* Decode metadata. */ 450 shsec_metadata_decode(buf, md); 451 g_free(buf); 452 453 return (0); 454 } 455 456 /* 457 * Add disk to given device. 458 */ 459 static int 460 g_shsec_add_disk(struct g_shsec_softc *sc, struct g_provider *pp, u_int no) 461 { 462 struct g_consumer *cp, *fcp; 463 struct g_geom *gp; 464 struct g_shsec_metadata md; 465 int error; 466 467 /* Metadata corrupted? */ 468 if (no >= sc->sc_ndisks) 469 return (EINVAL); 470 471 /* Check if disk is not already attached. */ 472 if (sc->sc_disks[no] != NULL) 473 return (EEXIST); 474 475 gp = sc->sc_geom; 476 fcp = LIST_FIRST(&gp->consumer); 477 478 cp = g_new_consumer(gp); 479 error = g_attach(cp, pp); 480 if (error != 0) { 481 g_destroy_consumer(cp); 482 return (error); 483 } 484 485 if (fcp != NULL && (fcp->acr > 0 || fcp->acw > 0 || fcp->ace > 0)) { 486 error = g_access(cp, fcp->acr, fcp->acw, fcp->ace); 487 if (error != 0) { 488 g_detach(cp); 489 g_destroy_consumer(cp); 490 return (error); 491 } 492 } 493 494 /* Reread metadata. */ 495 error = g_shsec_read_metadata(cp, &md); 496 if (error != 0) 497 goto fail; 498 499 if (strcmp(md.md_magic, G_SHSEC_MAGIC) != 0 || 500 strcmp(md.md_name, sc->sc_name) != 0 || md.md_id != sc->sc_id) { 501 G_SHSEC_DEBUG(0, "Metadata on %s changed.", pp->name); 502 goto fail; 503 } 504 505 cp->private = sc; 506 cp->index = no; 507 sc->sc_disks[no] = cp; 508 509 G_SHSEC_DEBUG(0, "Disk %s attached to %s.", pp->name, sc->sc_name); 510 511 g_shsec_check_and_run(sc); 512 513 return (0); 514 fail: 515 if (fcp != NULL && (fcp->acr > 0 || fcp->acw > 0 || fcp->ace > 0)) 516 g_access(cp, -fcp->acr, -fcp->acw, -fcp->ace); 517 g_detach(cp); 518 g_destroy_consumer(cp); 519 return (error); 520 } 521 522 static struct g_geom * 523 g_shsec_create(struct g_class *mp, const struct g_shsec_metadata *md) 524 { 525 struct g_shsec_softc *sc; 526 struct g_geom *gp; 527 u_int no; 528 529 G_SHSEC_DEBUG(1, "Creating device %s (id=%u).", md->md_name, md->md_id); 530 531 /* Two disks is minimum. */ 532 if (md->md_all < 2) { 533 G_SHSEC_DEBUG(0, "Too few disks defined for %s.", md->md_name); 534 return (NULL); 535 } 536 537 /* Check for duplicate unit */ 538 LIST_FOREACH(gp, &mp->geom, geom) { 539 sc = gp->softc; 540 if (sc != NULL && strcmp(sc->sc_name, md->md_name) == 0) { 541 G_SHSEC_DEBUG(0, "Device %s already configured.", 542 sc->sc_name); 543 return (NULL); 544 } 545 } 546 gp = g_new_geomf(mp, "%s", md->md_name); 547 gp->softc = NULL; /* for a moment */ 548 549 sc = malloc(sizeof(*sc), M_SHSEC, M_WAITOK | M_ZERO); 550 gp->start = g_shsec_start; 551 gp->spoiled = g_shsec_orphan; 552 gp->orphan = g_shsec_orphan; 553 gp->access = g_shsec_access; 554 gp->dumpconf = g_shsec_dumpconf; 555 556 sc->sc_id = md->md_id; 557 sc->sc_ndisks = md->md_all; 558 sc->sc_disks = malloc(sizeof(struct g_consumer *) * sc->sc_ndisks, 559 M_SHSEC, M_WAITOK | M_ZERO); 560 for (no = 0; no < sc->sc_ndisks; no++) 561 sc->sc_disks[no] = NULL; 562 563 gp->softc = sc; 564 sc->sc_geom = gp; 565 sc->sc_provider = NULL; 566 567 G_SHSEC_DEBUG(0, "Device %s created (id=%u).", sc->sc_name, sc->sc_id); 568 569 return (gp); 570 } 571 572 static int 573 g_shsec_destroy(struct g_shsec_softc *sc, boolean_t force) 574 { 575 struct g_provider *pp; 576 struct g_geom *gp; 577 u_int no; 578 579 g_topology_assert(); 580 581 if (sc == NULL) 582 return (ENXIO); 583 584 pp = sc->sc_provider; 585 if (pp != NULL && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) { 586 if (force) { 587 G_SHSEC_DEBUG(0, "Device %s is still open, so it " 588 "can't be definitely removed.", pp->name); 589 } else { 590 G_SHSEC_DEBUG(1, 591 "Device %s is still open (r%dw%de%d).", pp->name, 592 pp->acr, pp->acw, pp->ace); 593 return (EBUSY); 594 } 595 } 596 597 for (no = 0; no < sc->sc_ndisks; no++) { 598 if (sc->sc_disks[no] != NULL) 599 g_shsec_remove_disk(sc->sc_disks[no]); 600 } 601 602 gp = sc->sc_geom; 603 gp->softc = NULL; 604 KASSERT(sc->sc_provider == NULL, ("Provider still exists? (device=%s)", 605 gp->name)); 606 free(sc->sc_disks, M_SHSEC); 607 free(sc, M_SHSEC); 608 609 pp = LIST_FIRST(&gp->provider); 610 if (pp == NULL || (pp->acr == 0 && pp->acw == 0 && pp->ace == 0)) 611 G_SHSEC_DEBUG(0, "Device %s destroyed.", gp->name); 612 613 g_wither_geom(gp, ENXIO); 614 615 return (0); 616 } 617 618 static int 619 g_shsec_destroy_geom(struct gctl_req *req __unused, struct g_class *mp __unused, 620 struct g_geom *gp) 621 { 622 struct g_shsec_softc *sc; 623 624 sc = gp->softc; 625 return (g_shsec_destroy(sc, 0)); 626 } 627 628 static struct g_geom * 629 g_shsec_taste(struct g_class *mp, struct g_provider *pp, int flags __unused) 630 { 631 struct g_shsec_metadata md; 632 struct g_shsec_softc *sc; 633 struct g_consumer *cp; 634 struct g_geom *gp; 635 int error; 636 637 g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name); 638 g_topology_assert(); 639 640 G_SHSEC_DEBUG(3, "Tasting %s.", pp->name); 641 642 gp = g_new_geomf(mp, "shsec:taste"); 643 gp->start = g_shsec_start; 644 gp->access = g_shsec_access; 645 gp->orphan = g_shsec_orphan; 646 cp = g_new_consumer(gp); 647 g_attach(cp, pp); 648 error = g_shsec_read_metadata(cp, &md); 649 g_detach(cp); 650 g_destroy_consumer(cp); 651 g_destroy_geom(gp); 652 if (error != 0) 653 return (NULL); 654 gp = NULL; 655 656 if (strcmp(md.md_magic, G_SHSEC_MAGIC) != 0) 657 return (NULL); 658 if (md.md_version > G_SHSEC_VERSION) { 659 G_SHSEC_DEBUG(0, "Kernel module is too old to handle %s.\n", 660 pp->name); 661 return (NULL); 662 } 663 /* 664 * Backward compatibility: 665 */ 666 /* There was no md_provsize field in earlier versions of metadata. */ 667 if (md.md_version < 1) 668 md.md_provsize = pp->mediasize; 669 670 if (md.md_provider[0] != '\0' && strcmp(md.md_provider, pp->name) != 0) 671 return (NULL); 672 if (md.md_provsize != pp->mediasize) 673 return (NULL); 674 675 /* 676 * Let's check if device already exists. 677 */ 678 sc = NULL; 679 LIST_FOREACH(gp, &mp->geom, geom) { 680 sc = gp->softc; 681 if (sc == NULL) 682 continue; 683 if (strcmp(md.md_name, sc->sc_name) != 0) 684 continue; 685 if (md.md_id != sc->sc_id) 686 continue; 687 break; 688 } 689 if (gp != NULL) { 690 G_SHSEC_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); 691 error = g_shsec_add_disk(sc, pp, md.md_no); 692 if (error != 0) { 693 G_SHSEC_DEBUG(0, "Cannot add disk %s to %s (error=%d).", 694 pp->name, gp->name, error); 695 return (NULL); 696 } 697 } else { 698 gp = g_shsec_create(mp, &md); 699 if (gp == NULL) { 700 G_SHSEC_DEBUG(0, "Cannot create device %s.", md.md_name); 701 return (NULL); 702 } 703 sc = gp->softc; 704 G_SHSEC_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); 705 error = g_shsec_add_disk(sc, pp, md.md_no); 706 if (error != 0) { 707 G_SHSEC_DEBUG(0, "Cannot add disk %s to %s (error=%d).", 708 pp->name, gp->name, error); 709 g_shsec_destroy(sc, 1); 710 return (NULL); 711 } 712 } 713 return (gp); 714 } 715 716 static struct g_shsec_softc * 717 g_shsec_find_device(struct g_class *mp, const char *name) 718 { 719 struct g_shsec_softc *sc; 720 struct g_geom *gp; 721 722 LIST_FOREACH(gp, &mp->geom, geom) { 723 sc = gp->softc; 724 if (sc == NULL) 725 continue; 726 if (strcmp(sc->sc_name, name) == 0) 727 return (sc); 728 } 729 return (NULL); 730 } 731 732 static void 733 g_shsec_ctl_destroy(struct gctl_req *req, struct g_class *mp) 734 { 735 struct g_shsec_softc *sc; 736 int *force, *nargs, error; 737 const char *name; 738 char param[16]; 739 u_int i; 740 741 g_topology_assert(); 742 743 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 744 if (nargs == NULL) { 745 gctl_error(req, "No '%s' argument.", "nargs"); 746 return; 747 } 748 if (*nargs <= 0) { 749 gctl_error(req, "Missing device(s)."); 750 return; 751 } 752 force = gctl_get_paraml(req, "force", sizeof(*force)); 753 if (force == NULL) { 754 gctl_error(req, "No '%s' argument.", "force"); 755 return; 756 } 757 758 for (i = 0; i < (u_int)*nargs; i++) { 759 snprintf(param, sizeof(param), "arg%u", i); 760 name = gctl_get_asciiparam(req, param); 761 if (name == NULL) { 762 gctl_error(req, "No 'arg%u' argument.", i); 763 return; 764 } 765 sc = g_shsec_find_device(mp, name); 766 if (sc == NULL) { 767 gctl_error(req, "No such device: %s.", name); 768 return; 769 } 770 error = g_shsec_destroy(sc, *force); 771 if (error != 0) { 772 gctl_error(req, "Cannot destroy device %s (error=%d).", 773 sc->sc_name, error); 774 return; 775 } 776 } 777 } 778 779 static void 780 g_shsec_config(struct gctl_req *req, struct g_class *mp, const char *verb) 781 { 782 uint32_t *version; 783 784 g_topology_assert(); 785 786 version = gctl_get_paraml(req, "version", sizeof(*version)); 787 if (version == NULL) { 788 gctl_error(req, "No '%s' argument.", "version"); 789 return; 790 } 791 if (*version != G_SHSEC_VERSION) { 792 gctl_error(req, "Userland and kernel parts are out of sync."); 793 return; 794 } 795 796 if (strcmp(verb, "stop") == 0) { 797 g_shsec_ctl_destroy(req, mp); 798 return; 799 } 800 801 gctl_error(req, "Unknown verb."); 802 } 803 804 static void 805 g_shsec_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, 806 struct g_consumer *cp, struct g_provider *pp) 807 { 808 struct g_shsec_softc *sc; 809 810 sc = gp->softc; 811 if (sc == NULL) 812 return; 813 if (pp != NULL) { 814 /* Nothing here. */ 815 } else if (cp != NULL) { 816 sbuf_printf(sb, "%s<Number>%u</Number>\n", indent, 817 (u_int)cp->index); 818 } else { 819 sbuf_printf(sb, "%s<ID>%u</ID>\n", indent, (u_int)sc->sc_id); 820 sbuf_printf(sb, "%s<Status>Total=%u, Online=%u</Status>\n", 821 indent, sc->sc_ndisks, g_shsec_nvalid(sc)); 822 sbuf_printf(sb, "%s<State>", indent); 823 if (sc->sc_provider != NULL && sc->sc_provider->error == 0) 824 sbuf_printf(sb, "UP"); 825 else 826 sbuf_printf(sb, "DOWN"); 827 sbuf_printf(sb, "</State>\n"); 828 } 829 } 830 831 DECLARE_GEOM_CLASS(g_shsec_class, g_shsec);
Cache object: fadac977d584555a69098ffa408568d2
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]