g_shsec.c revision 306765
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: stable/10/sys/geom/shsec/g_shsec.c 306765 2016-10-06 15:36:13Z mav $"); 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/sbuf.h> 38#include <sys/sysctl.h> 39#include <sys/malloc.h> 40#include <vm/uma.h> 41#include <geom/geom.h> 42#include <geom/shsec/g_shsec.h> 43 44FEATURE(geom_shsec, "GEOM shared secret device support"); 45 46static MALLOC_DEFINE(M_SHSEC, "shsec_data", "GEOM_SHSEC Data"); 47 48static uma_zone_t g_shsec_zone; 49 50static int g_shsec_destroy(struct g_shsec_softc *sc, boolean_t force); 51static int g_shsec_destroy_geom(struct gctl_req *req, struct g_class *mp, 52 struct g_geom *gp); 53 54static g_taste_t g_shsec_taste; 55static g_ctl_req_t g_shsec_config; 56static g_dumpconf_t g_shsec_dumpconf; 57static g_init_t g_shsec_init; 58static g_fini_t g_shsec_fini; 59 60struct g_class g_shsec_class = { 61 .name = G_SHSEC_CLASS_NAME, 62 .version = G_VERSION, 63 .ctlreq = g_shsec_config, 64 .taste = g_shsec_taste, 65 .destroy_geom = g_shsec_destroy_geom, 66 .init = g_shsec_init, 67 .fini = g_shsec_fini 68}; 69 70SYSCTL_DECL(_kern_geom); 71static SYSCTL_NODE(_kern_geom, OID_AUTO, shsec, CTLFLAG_RW, 0, 72 "GEOM_SHSEC stuff"); 73static u_int g_shsec_debug = 0; 74TUNABLE_INT("kern.geom.shsec.debug", &g_shsec_debug); 75SYSCTL_UINT(_kern_geom_shsec, OID_AUTO, debug, CTLFLAG_RW, &g_shsec_debug, 0, 76 "Debug level"); 77static u_int g_shsec_maxmem = MAXPHYS * 100; 78TUNABLE_INT("kern.geom.shsec.maxmem", &g_shsec_maxmem); 79SYSCTL_UINT(_kern_geom_shsec, OID_AUTO, maxmem, CTLFLAG_RD, &g_shsec_maxmem, 80 0, "Maximum memory that can be allocated for I/O (in bytes)"); 81static u_int g_shsec_alloc_failed = 0; 82SYSCTL_UINT(_kern_geom_shsec, OID_AUTO, alloc_failed, CTLFLAG_RD, 83 &g_shsec_alloc_failed, 0, "How many times I/O allocation failed"); 84 85/* 86 * Greatest Common Divisor. 87 */ 88static u_int 89gcd(u_int a, u_int b) 90{ 91 u_int c; 92 93 while (b != 0) { 94 c = a; 95 a = b; 96 b = (c % b); 97 } 98 return (a); 99} 100 101/* 102 * Least Common Multiple. 103 */ 104static u_int 105lcm(u_int a, u_int b) 106{ 107 108 return ((a * b) / gcd(a, b)); 109} 110 111static void 112g_shsec_init(struct g_class *mp __unused) 113{ 114 115 g_shsec_zone = uma_zcreate("g_shsec_zone", MAXPHYS, NULL, NULL, NULL, 116 NULL, 0, 0); 117 g_shsec_maxmem -= g_shsec_maxmem % MAXPHYS; 118 uma_zone_set_max(g_shsec_zone, g_shsec_maxmem / MAXPHYS); 119} 120 121static void 122g_shsec_fini(struct g_class *mp __unused) 123{ 124 125 uma_zdestroy(g_shsec_zone); 126} 127 128/* 129 * Return the number of valid disks. 130 */ 131static u_int 132g_shsec_nvalid(struct g_shsec_softc *sc) 133{ 134 u_int i, no; 135 136 no = 0; 137 for (i = 0; i < sc->sc_ndisks; i++) { 138 if (sc->sc_disks[i] != NULL) 139 no++; 140 } 141 142 return (no); 143} 144 145static void 146g_shsec_remove_disk(struct g_consumer *cp) 147{ 148 struct g_shsec_softc *sc; 149 u_int no; 150 151 KASSERT(cp != NULL, ("Non-valid disk in %s.", __func__)); 152 sc = (struct g_shsec_softc *)cp->private; 153 KASSERT(sc != NULL, ("NULL sc in %s.", __func__)); 154 no = cp->index; 155 156 G_SHSEC_DEBUG(0, "Disk %s removed from %s.", cp->provider->name, 157 sc->sc_name); 158 159 sc->sc_disks[no] = NULL; 160 if (sc->sc_provider != NULL) { 161 g_wither_provider(sc->sc_provider, ENXIO); 162 sc->sc_provider = NULL; 163 G_SHSEC_DEBUG(0, "Device %s removed.", sc->sc_name); 164 } 165 166 if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0) 167 g_access(cp, -cp->acr, -cp->acw, -cp->ace); 168 g_detach(cp); 169 g_destroy_consumer(cp); 170} 171 172static void 173g_shsec_orphan(struct g_consumer *cp) 174{ 175 struct g_shsec_softc *sc; 176 struct g_geom *gp; 177 178 g_topology_assert(); 179 gp = cp->geom; 180 sc = gp->softc; 181 if (sc == NULL) 182 return; 183 184 g_shsec_remove_disk(cp); 185 /* If there are no valid disks anymore, remove device. */ 186 if (g_shsec_nvalid(sc) == 0) 187 g_shsec_destroy(sc, 1); 188} 189 190static int 191g_shsec_access(struct g_provider *pp, int dr, int dw, int de) 192{ 193 struct g_consumer *cp1, *cp2; 194 struct g_shsec_softc *sc; 195 struct g_geom *gp; 196 int error; 197 198 gp = pp->geom; 199 sc = gp->softc; 200 201 if (sc == NULL) { 202 /* 203 * It looks like geom is being withered. 204 * In that case we allow only negative requests. 205 */ 206 KASSERT(dr <= 0 && dw <= 0 && de <= 0, 207 ("Positive access request (device=%s).", pp->name)); 208 if ((pp->acr + dr) == 0 && (pp->acw + dw) == 0 && 209 (pp->ace + de) == 0) { 210 G_SHSEC_DEBUG(0, "Device %s definitely destroyed.", 211 gp->name); 212 } 213 return (0); 214 } 215 216 /* On first open, grab an extra "exclusive" bit */ 217 if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0) 218 de++; 219 /* ... and let go of it on last close */ 220 if ((pp->acr + dr) == 0 && (pp->acw + dw) == 0 && (pp->ace + de) == 0) 221 de--; 222 223 error = ENXIO; 224 LIST_FOREACH(cp1, &gp->consumer, consumer) { 225 error = g_access(cp1, dr, dw, de); 226 if (error == 0) 227 continue; 228 /* 229 * If we fail here, backout all previous changes. 230 */ 231 LIST_FOREACH(cp2, &gp->consumer, consumer) { 232 if (cp1 == cp2) 233 return (error); 234 g_access(cp2, -dr, -dw, -de); 235 } 236 /* NOTREACHED */ 237 } 238 239 return (error); 240} 241 242static void 243g_shsec_xor1(uint32_t *src, uint32_t *dst, ssize_t len) 244{ 245 246 for (; len > 0; len -= sizeof(uint32_t), dst++) 247 *dst = *dst ^ *src++; 248 KASSERT(len == 0, ("len != 0 (len=%zd)", len)); 249} 250 251static void 252g_shsec_done(struct bio *bp) 253{ 254 struct g_shsec_softc *sc; 255 struct bio *pbp; 256 257 pbp = bp->bio_parent; 258 sc = pbp->bio_to->geom->softc; 259 if (bp->bio_error == 0) 260 G_SHSEC_LOGREQ(2, bp, "Request done."); 261 else { 262 G_SHSEC_LOGREQ(0, bp, "Request failed (error=%d).", 263 bp->bio_error); 264 if (pbp->bio_error == 0) 265 pbp->bio_error = bp->bio_error; 266 } 267 if (pbp->bio_cmd == BIO_READ) { 268 if ((pbp->bio_pflags & G_SHSEC_BFLAG_FIRST) != 0) { 269 bcopy(bp->bio_data, pbp->bio_data, pbp->bio_length); 270 pbp->bio_pflags = 0; 271 } else { 272 g_shsec_xor1((uint32_t *)bp->bio_data, 273 (uint32_t *)pbp->bio_data, 274 (ssize_t)pbp->bio_length); 275 } 276 } 277 bzero(bp->bio_data, bp->bio_length); 278 uma_zfree(g_shsec_zone, bp->bio_data); 279 g_destroy_bio(bp); 280 pbp->bio_inbed++; 281 if (pbp->bio_children == pbp->bio_inbed) { 282 pbp->bio_completed = pbp->bio_length; 283 g_io_deliver(pbp, pbp->bio_error); 284 } 285} 286 287static void 288g_shsec_xor2(uint32_t *rand, uint32_t *dst, ssize_t len) 289{ 290 291 for (; len > 0; len -= sizeof(uint32_t), dst++) { 292 *rand = arc4random(); 293 *dst = *dst ^ *rand++; 294 } 295 KASSERT(len == 0, ("len != 0 (len=%zd)", len)); 296} 297 298static void 299g_shsec_start(struct bio *bp) 300{ 301 TAILQ_HEAD(, bio) queue = TAILQ_HEAD_INITIALIZER(queue); 302 struct g_shsec_softc *sc; 303 struct bio *cbp; 304 uint32_t *dst; 305 ssize_t len; 306 u_int no; 307 int error; 308 309 sc = bp->bio_to->geom->softc; 310 /* 311 * If sc == NULL, provider's error should be set and g_shsec_start() 312 * should not be called at all. 313 */ 314 KASSERT(sc != NULL, 315 ("Provider's error should be set (error=%d)(device=%s).", 316 bp->bio_to->error, bp->bio_to->name)); 317 318 G_SHSEC_LOGREQ(2, bp, "Request received."); 319 320 switch (bp->bio_cmd) { 321 case BIO_READ: 322 case BIO_WRITE: 323 case BIO_FLUSH: 324 /* 325 * Only those requests are supported. 326 */ 327 break; 328 case BIO_DELETE: 329 case BIO_GETATTR: 330 /* To which provider it should be delivered? */ 331 default: 332 g_io_deliver(bp, EOPNOTSUPP); 333 return; 334 } 335 336 /* 337 * Allocate all bios first and calculate XOR. 338 */ 339 dst = NULL; 340 len = bp->bio_length; 341 if (bp->bio_cmd == BIO_READ) 342 bp->bio_pflags = G_SHSEC_BFLAG_FIRST; 343 for (no = 0; no < sc->sc_ndisks; no++) { 344 cbp = g_clone_bio(bp); 345 if (cbp == NULL) { 346 error = ENOMEM; 347 goto failure; 348 } 349 TAILQ_INSERT_TAIL(&queue, cbp, bio_queue); 350 351 /* 352 * Fill in the component buf structure. 353 */ 354 cbp->bio_done = g_shsec_done; 355 cbp->bio_data = uma_zalloc(g_shsec_zone, M_NOWAIT); 356 if (cbp->bio_data == NULL) { 357 g_shsec_alloc_failed++; 358 error = ENOMEM; 359 goto failure; 360 } 361 cbp->bio_caller2 = sc->sc_disks[no]; 362 if (bp->bio_cmd == BIO_WRITE) { 363 if (no == 0) { 364 dst = (uint32_t *)cbp->bio_data; 365 bcopy(bp->bio_data, dst, len); 366 } else { 367 g_shsec_xor2((uint32_t *)cbp->bio_data, dst, 368 len); 369 } 370 } 371 } 372 /* 373 * Fire off all allocated requests! 374 */ 375 while ((cbp = TAILQ_FIRST(&queue)) != NULL) { 376 struct g_consumer *cp; 377 378 TAILQ_REMOVE(&queue, cbp, bio_queue); 379 cp = cbp->bio_caller2; 380 cbp->bio_caller2 = NULL; 381 cbp->bio_to = cp->provider; 382 G_SHSEC_LOGREQ(2, cbp, "Sending request."); 383 g_io_request(cbp, cp); 384 } 385 return; 386failure: 387 while ((cbp = TAILQ_FIRST(&queue)) != NULL) { 388 TAILQ_REMOVE(&queue, cbp, bio_queue); 389 bp->bio_children--; 390 if (cbp->bio_data != NULL) { 391 bzero(cbp->bio_data, cbp->bio_length); 392 uma_zfree(g_shsec_zone, cbp->bio_data); 393 } 394 g_destroy_bio(cbp); 395 } 396 if (bp->bio_error == 0) 397 bp->bio_error = error; 398 g_io_deliver(bp, bp->bio_error); 399} 400 401static void 402g_shsec_check_and_run(struct g_shsec_softc *sc) 403{ 404 off_t mediasize, ms; 405 u_int no, sectorsize = 0; 406 407 if (g_shsec_nvalid(sc) != sc->sc_ndisks) 408 return; 409 410 sc->sc_provider = g_new_providerf(sc->sc_geom, "shsec/%s", sc->sc_name); 411 /* 412 * Find the smallest disk. 413 */ 414 mediasize = sc->sc_disks[0]->provider->mediasize; 415 mediasize -= sc->sc_disks[0]->provider->sectorsize; 416 sectorsize = sc->sc_disks[0]->provider->sectorsize; 417 for (no = 1; no < sc->sc_ndisks; no++) { 418 ms = sc->sc_disks[no]->provider->mediasize; 419 ms -= sc->sc_disks[no]->provider->sectorsize; 420 if (ms < mediasize) 421 mediasize = ms; 422 sectorsize = lcm(sectorsize, 423 sc->sc_disks[no]->provider->sectorsize); 424 } 425 sc->sc_provider->sectorsize = sectorsize; 426 sc->sc_provider->mediasize = mediasize; 427 g_error_provider(sc->sc_provider, 0); 428 429 G_SHSEC_DEBUG(0, "Device %s activated.", sc->sc_name); 430} 431 432static int 433g_shsec_read_metadata(struct g_consumer *cp, struct g_shsec_metadata *md) 434{ 435 struct g_provider *pp; 436 u_char *buf; 437 int error; 438 439 g_topology_assert(); 440 441 error = g_access(cp, 1, 0, 0); 442 if (error != 0) 443 return (error); 444 pp = cp->provider; 445 g_topology_unlock(); 446 buf = g_read_data(cp, pp->mediasize - pp->sectorsize, pp->sectorsize, 447 &error); 448 g_topology_lock(); 449 g_access(cp, -1, 0, 0); 450 if (buf == NULL) 451 return (error); 452 453 /* Decode metadata. */ 454 shsec_metadata_decode(buf, md); 455 g_free(buf); 456 457 return (0); 458} 459 460/* 461 * Add disk to given device. 462 */ 463static int 464g_shsec_add_disk(struct g_shsec_softc *sc, struct g_provider *pp, u_int no) 465{ 466 struct g_consumer *cp, *fcp; 467 struct g_geom *gp; 468 struct g_shsec_metadata md; 469 int error; 470 471 /* Metadata corrupted? */ 472 if (no >= sc->sc_ndisks) 473 return (EINVAL); 474 475 /* Check if disk is not already attached. */ 476 if (sc->sc_disks[no] != NULL) 477 return (EEXIST); 478 479 gp = sc->sc_geom; 480 fcp = LIST_FIRST(&gp->consumer); 481 482 cp = g_new_consumer(gp); 483 error = g_attach(cp, pp); 484 if (error != 0) { 485 g_destroy_consumer(cp); 486 return (error); 487 } 488 489 if (fcp != NULL && (fcp->acr > 0 || fcp->acw > 0 || fcp->ace > 0)) { 490 error = g_access(cp, fcp->acr, fcp->acw, fcp->ace); 491 if (error != 0) { 492 g_detach(cp); 493 g_destroy_consumer(cp); 494 return (error); 495 } 496 } 497 498 /* Reread metadata. */ 499 error = g_shsec_read_metadata(cp, &md); 500 if (error != 0) 501 goto fail; 502 503 if (strcmp(md.md_magic, G_SHSEC_MAGIC) != 0 || 504 strcmp(md.md_name, sc->sc_name) != 0 || md.md_id != sc->sc_id) { 505 G_SHSEC_DEBUG(0, "Metadata on %s changed.", pp->name); 506 goto fail; 507 } 508 509 cp->private = sc; 510 cp->index = no; 511 sc->sc_disks[no] = cp; 512 513 G_SHSEC_DEBUG(0, "Disk %s attached to %s.", pp->name, sc->sc_name); 514 515 g_shsec_check_and_run(sc); 516 517 return (0); 518fail: 519 if (fcp != NULL && (fcp->acr > 0 || fcp->acw > 0 || fcp->ace > 0)) 520 g_access(cp, -fcp->acr, -fcp->acw, -fcp->ace); 521 g_detach(cp); 522 g_destroy_consumer(cp); 523 return (error); 524} 525 526static struct g_geom * 527g_shsec_create(struct g_class *mp, const struct g_shsec_metadata *md) 528{ 529 struct g_shsec_softc *sc; 530 struct g_geom *gp; 531 u_int no; 532 533 G_SHSEC_DEBUG(1, "Creating device %s (id=%u).", md->md_name, md->md_id); 534 535 /* Two disks is minimum. */ 536 if (md->md_all < 2) { 537 G_SHSEC_DEBUG(0, "Too few disks defined for %s.", md->md_name); 538 return (NULL); 539 } 540 541 /* Check for duplicate unit */ 542 LIST_FOREACH(gp, &mp->geom, geom) { 543 sc = gp->softc; 544 if (sc != NULL && strcmp(sc->sc_name, md->md_name) == 0) { 545 G_SHSEC_DEBUG(0, "Device %s already configured.", 546 sc->sc_name); 547 return (NULL); 548 } 549 } 550 gp = g_new_geomf(mp, "%s", md->md_name); 551 sc = malloc(sizeof(*sc), M_SHSEC, M_WAITOK | M_ZERO); 552 gp->start = g_shsec_start; 553 gp->spoiled = g_shsec_orphan; 554 gp->orphan = g_shsec_orphan; 555 gp->access = g_shsec_access; 556 gp->dumpconf = g_shsec_dumpconf; 557 558 sc->sc_id = md->md_id; 559 sc->sc_ndisks = md->md_all; 560 sc->sc_disks = malloc(sizeof(struct g_consumer *) * sc->sc_ndisks, 561 M_SHSEC, M_WAITOK | M_ZERO); 562 for (no = 0; no < sc->sc_ndisks; no++) 563 sc->sc_disks[no] = NULL; 564 565 gp->softc = sc; 566 sc->sc_geom = gp; 567 sc->sc_provider = NULL; 568 569 G_SHSEC_DEBUG(0, "Device %s created (id=%u).", sc->sc_name, sc->sc_id); 570 571 return (gp); 572} 573 574static int 575g_shsec_destroy(struct g_shsec_softc *sc, boolean_t force) 576{ 577 struct g_provider *pp; 578 struct g_geom *gp; 579 u_int no; 580 581 g_topology_assert(); 582 583 if (sc == NULL) 584 return (ENXIO); 585 586 pp = sc->sc_provider; 587 if (pp != NULL && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) { 588 if (force) { 589 G_SHSEC_DEBUG(0, "Device %s is still open, so it " 590 "can't be definitely removed.", pp->name); 591 } else { 592 G_SHSEC_DEBUG(1, 593 "Device %s is still open (r%dw%de%d).", pp->name, 594 pp->acr, pp->acw, pp->ace); 595 return (EBUSY); 596 } 597 } 598 599 for (no = 0; no < sc->sc_ndisks; no++) { 600 if (sc->sc_disks[no] != NULL) 601 g_shsec_remove_disk(sc->sc_disks[no]); 602 } 603 604 gp = sc->sc_geom; 605 gp->softc = NULL; 606 KASSERT(sc->sc_provider == NULL, ("Provider still exists? (device=%s)", 607 gp->name)); 608 free(sc->sc_disks, M_SHSEC); 609 free(sc, M_SHSEC); 610 611 pp = LIST_FIRST(&gp->provider); 612 if (pp == NULL || (pp->acr == 0 && pp->acw == 0 && pp->ace == 0)) 613 G_SHSEC_DEBUG(0, "Device %s destroyed.", gp->name); 614 615 g_wither_geom(gp, ENXIO); 616 617 return (0); 618} 619 620static int 621g_shsec_destroy_geom(struct gctl_req *req __unused, struct g_class *mp __unused, 622 struct g_geom *gp) 623{ 624 struct g_shsec_softc *sc; 625 626 sc = gp->softc; 627 return (g_shsec_destroy(sc, 0)); 628} 629 630static struct g_geom * 631g_shsec_taste(struct g_class *mp, struct g_provider *pp, int flags __unused) 632{ 633 struct g_shsec_metadata md; 634 struct g_shsec_softc *sc; 635 struct g_consumer *cp; 636 struct g_geom *gp; 637 int error; 638 639 g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name); 640 g_topology_assert(); 641 642 /* Skip providers that are already open for writing. */ 643 if (pp->acw > 0) 644 return (NULL); 645 646 G_SHSEC_DEBUG(3, "Tasting %s.", pp->name); 647 648 gp = g_new_geomf(mp, "shsec:taste"); 649 gp->start = g_shsec_start; 650 gp->access = g_shsec_access; 651 gp->orphan = g_shsec_orphan; 652 cp = g_new_consumer(gp); 653 g_attach(cp, pp); 654 error = g_shsec_read_metadata(cp, &md); 655 g_detach(cp); 656 g_destroy_consumer(cp); 657 g_destroy_geom(gp); 658 if (error != 0) 659 return (NULL); 660 gp = NULL; 661 662 if (strcmp(md.md_magic, G_SHSEC_MAGIC) != 0) 663 return (NULL); 664 if (md.md_version > G_SHSEC_VERSION) { 665 G_SHSEC_DEBUG(0, "Kernel module is too old to handle %s.\n", 666 pp->name); 667 return (NULL); 668 } 669 /* 670 * Backward compatibility: 671 */ 672 /* There was no md_provsize field in earlier versions of metadata. */ 673 if (md.md_version < 1) 674 md.md_provsize = pp->mediasize; 675 676 if (md.md_provider[0] != '\0' && 677 !g_compare_names(md.md_provider, pp->name)) 678 return (NULL); 679 if (md.md_provsize != pp->mediasize) 680 return (NULL); 681 682 /* 683 * Let's check if device already exists. 684 */ 685 sc = NULL; 686 LIST_FOREACH(gp, &mp->geom, geom) { 687 sc = gp->softc; 688 if (sc == NULL) 689 continue; 690 if (strcmp(md.md_name, sc->sc_name) != 0) 691 continue; 692 if (md.md_id != sc->sc_id) 693 continue; 694 break; 695 } 696 if (gp != NULL) { 697 G_SHSEC_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); 698 error = g_shsec_add_disk(sc, pp, md.md_no); 699 if (error != 0) { 700 G_SHSEC_DEBUG(0, "Cannot add disk %s to %s (error=%d).", 701 pp->name, gp->name, error); 702 return (NULL); 703 } 704 } else { 705 gp = g_shsec_create(mp, &md); 706 if (gp == NULL) { 707 G_SHSEC_DEBUG(0, "Cannot create device %s.", md.md_name); 708 return (NULL); 709 } 710 sc = gp->softc; 711 G_SHSEC_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); 712 error = g_shsec_add_disk(sc, pp, md.md_no); 713 if (error != 0) { 714 G_SHSEC_DEBUG(0, "Cannot add disk %s to %s (error=%d).", 715 pp->name, gp->name, error); 716 g_shsec_destroy(sc, 1); 717 return (NULL); 718 } 719 } 720 return (gp); 721} 722 723static struct g_shsec_softc * 724g_shsec_find_device(struct g_class *mp, const char *name) 725{ 726 struct g_shsec_softc *sc; 727 struct g_geom *gp; 728 729 LIST_FOREACH(gp, &mp->geom, geom) { 730 sc = gp->softc; 731 if (sc == NULL) 732 continue; 733 if (strcmp(sc->sc_name, name) == 0) 734 return (sc); 735 } 736 return (NULL); 737} 738 739static void 740g_shsec_ctl_destroy(struct gctl_req *req, struct g_class *mp) 741{ 742 struct g_shsec_softc *sc; 743 int *force, *nargs, error; 744 const char *name; 745 char param[16]; 746 u_int i; 747 748 g_topology_assert(); 749 750 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 751 if (nargs == NULL) { 752 gctl_error(req, "No '%s' argument.", "nargs"); 753 return; 754 } 755 if (*nargs <= 0) { 756 gctl_error(req, "Missing device(s)."); 757 return; 758 } 759 force = gctl_get_paraml(req, "force", sizeof(*force)); 760 if (force == NULL) { 761 gctl_error(req, "No '%s' argument.", "force"); 762 return; 763 } 764 765 for (i = 0; i < (u_int)*nargs; i++) { 766 snprintf(param, sizeof(param), "arg%u", i); 767 name = gctl_get_asciiparam(req, param); 768 if (name == NULL) { 769 gctl_error(req, "No 'arg%u' argument.", i); 770 return; 771 } 772 sc = g_shsec_find_device(mp, name); 773 if (sc == NULL) { 774 gctl_error(req, "No such device: %s.", name); 775 return; 776 } 777 error = g_shsec_destroy(sc, *force); 778 if (error != 0) { 779 gctl_error(req, "Cannot destroy device %s (error=%d).", 780 sc->sc_name, error); 781 return; 782 } 783 } 784} 785 786static void 787g_shsec_config(struct gctl_req *req, struct g_class *mp, const char *verb) 788{ 789 uint32_t *version; 790 791 g_topology_assert(); 792 793 version = gctl_get_paraml(req, "version", sizeof(*version)); 794 if (version == NULL) { 795 gctl_error(req, "No '%s' argument.", "version"); 796 return; 797 } 798 if (*version != G_SHSEC_VERSION) { 799 gctl_error(req, "Userland and kernel parts are out of sync."); 800 return; 801 } 802 803 if (strcmp(verb, "stop") == 0) { 804 g_shsec_ctl_destroy(req, mp); 805 return; 806 } 807 808 gctl_error(req, "Unknown verb."); 809} 810 811static void 812g_shsec_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, 813 struct g_consumer *cp, struct g_provider *pp) 814{ 815 struct g_shsec_softc *sc; 816 817 sc = gp->softc; 818 if (sc == NULL) 819 return; 820 if (pp != NULL) { 821 /* Nothing here. */ 822 } else if (cp != NULL) { 823 sbuf_printf(sb, "%s<Number>%u</Number>\n", indent, 824 (u_int)cp->index); 825 } else { 826 sbuf_printf(sb, "%s<ID>%u</ID>\n", indent, (u_int)sc->sc_id); 827 sbuf_printf(sb, "%s<Status>Total=%u, Online=%u</Status>\n", 828 indent, sc->sc_ndisks, g_shsec_nvalid(sc)); 829 sbuf_printf(sb, "%s<State>", indent); 830 if (sc->sc_provider != NULL && sc->sc_provider->error == 0) 831 sbuf_printf(sb, "UP"); 832 else 833 sbuf_printf(sb, "DOWN"); 834 sbuf_printf(sb, "</State>\n"); 835 } 836} 837 838DECLARE_GEOM_CLASS(g_shsec_class, g_shsec); 839