1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2005 Pawel Jakub Dawidek <pjd@FreeBSD.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/kernel.h> 35 #include <sys/module.h> 36 #include <sys/lock.h> 37 #include <sys/mutex.h> 38 #include <sys/bio.h> 39 #include <sys/sbuf.h> 40 #include <sys/sysctl.h> 41 #include <sys/malloc.h> 42 #include <vm/uma.h> 43 #include <geom/geom.h> 44 #include <geom/geom_dbg.h> 45 #include <geom/shsec/g_shsec.h> 46 47 FEATURE(geom_shsec, "GEOM shared secret device support"); 48 49 static MALLOC_DEFINE(M_SHSEC, "shsec_data", "GEOM_SHSEC Data"); 50 51 static uma_zone_t g_shsec_zone; 52 53 static int g_shsec_destroy(struct g_shsec_softc *sc, boolean_t force); 54 static int g_shsec_destroy_geom(struct gctl_req *req, struct g_class *mp, 55 struct g_geom *gp); 56 57 static g_taste_t g_shsec_taste; 58 static g_ctl_req_t g_shsec_config; 59 static g_dumpconf_t g_shsec_dumpconf; 60 static g_init_t g_shsec_init; 61 static g_fini_t g_shsec_fini; 62 63 struct g_class g_shsec_class = { 64 .name = G_SHSEC_CLASS_NAME, 65 .version = G_VERSION, 66 .ctlreq = g_shsec_config, 67 .taste = g_shsec_taste, 68 .destroy_geom = g_shsec_destroy_geom, 69 .init = g_shsec_init, 70 .fini = g_shsec_fini 71 }; 72 73 SYSCTL_DECL(_kern_geom); 74 static SYSCTL_NODE(_kern_geom, OID_AUTO, shsec, CTLFLAG_RW, 0, 75 "GEOM_SHSEC stuff"); 76 static u_int g_shsec_debug = 0; 77 SYSCTL_UINT(_kern_geom_shsec, OID_AUTO, debug, CTLFLAG_RWTUN, &g_shsec_debug, 0, 78 "Debug level"); 79 static u_int g_shsec_maxmem = MAXPHYS * 100; 80 SYSCTL_UINT(_kern_geom_shsec, OID_AUTO, maxmem, CTLFLAG_RDTUN, &g_shsec_maxmem, 81 0, "Maximum memory that can be allocated for I/O (in bytes)"); 82 static u_int g_shsec_alloc_failed = 0; 83 SYSCTL_UINT(_kern_geom_shsec, OID_AUTO, alloc_failed, CTLFLAG_RD, 84 &g_shsec_alloc_failed, 0, "How many times I/O allocation failed"); 85 86 /* 87 * Greatest Common Divisor. 88 */ 89 static u_int 90 gcd(u_int a, u_int b) 91 { 92 u_int c; 93 94 while (b != 0) { 95 c = a; 96 a = b; 97 b = (c % b); 98 } 99 return (a); 100 } 101 102 /* 103 * Least Common Multiple. 104 */ 105 static u_int 106 lcm(u_int a, u_int b) 107 { 108 109 return ((a * b) / gcd(a, b)); 110 } 111 112 static void 113 g_shsec_init(struct g_class *mp __unused) 114 { 115 116 g_shsec_zone = uma_zcreate("g_shsec_zone", MAXPHYS, NULL, NULL, NULL, 117 NULL, 0, 0); 118 g_shsec_maxmem -= g_shsec_maxmem % MAXPHYS; 119 uma_zone_set_max(g_shsec_zone, g_shsec_maxmem / MAXPHYS); 120 } 121 122 static void 123 g_shsec_fini(struct g_class *mp __unused) 124 { 125 126 uma_zdestroy(g_shsec_zone); 127 } 128 129 /* 130 * Return the number of valid disks. 131 */ 132 static u_int 133 g_shsec_nvalid(struct g_shsec_softc *sc) 134 { 135 u_int i, no; 136 137 no = 0; 138 for (i = 0; i < sc->sc_ndisks; i++) { 139 if (sc->sc_disks[i] != NULL) 140 no++; 141 } 142 143 return (no); 144 } 145 146 static void 147 g_shsec_remove_disk(struct g_consumer *cp) 148 { 149 struct g_shsec_softc *sc; 150 u_int no; 151 152 KASSERT(cp != NULL, ("Non-valid disk in %s.", __func__)); 153 sc = (struct g_shsec_softc *)cp->private; 154 KASSERT(sc != NULL, ("NULL sc in %s.", __func__)); 155 no = cp->index; 156 157 G_SHSEC_DEBUG(0, "Disk %s removed from %s.", cp->provider->name, 158 sc->sc_name); 159 160 sc->sc_disks[no] = NULL; 161 if (sc->sc_provider != NULL) { 162 g_wither_provider(sc->sc_provider, ENXIO); 163 sc->sc_provider = NULL; 164 G_SHSEC_DEBUG(0, "Device %s removed.", sc->sc_name); 165 } 166 167 if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0) 168 return; 169 g_detach(cp); 170 g_destroy_consumer(cp); 171 } 172 173 static void 174 g_shsec_orphan(struct g_consumer *cp) 175 { 176 struct g_shsec_softc *sc; 177 struct g_geom *gp; 178 179 g_topology_assert(); 180 gp = cp->geom; 181 sc = gp->softc; 182 if (sc == NULL) 183 return; 184 185 g_shsec_remove_disk(cp); 186 /* If there are no valid disks anymore, remove device. */ 187 if (LIST_EMPTY(&gp->consumer)) 188 g_shsec_destroy(sc, 1); 189 } 190 191 static int 192 g_shsec_access(struct g_provider *pp, int dr, int dw, int de) 193 { 194 struct g_consumer *cp1, *cp2, *tmp; 195 struct g_shsec_softc *sc; 196 struct g_geom *gp; 197 int error; 198 199 gp = pp->geom; 200 sc = gp->softc; 201 202 /* On first open, grab an extra "exclusive" bit */ 203 if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0) 204 de++; 205 /* ... and let go of it on last close */ 206 if ((pp->acr + dr) == 0 && (pp->acw + dw) == 0 && (pp->ace + de) == 0) 207 de--; 208 209 error = ENXIO; 210 LIST_FOREACH_SAFE(cp1, &gp->consumer, consumer, tmp) { 211 error = g_access(cp1, dr, dw, de); 212 if (error != 0) 213 goto fail; 214 if (cp1->acr == 0 && cp1->acw == 0 && cp1->ace == 0 && 215 cp1->flags & G_CF_ORPHAN) { 216 g_detach(cp1); 217 g_destroy_consumer(cp1); 218 } 219 } 220 221 /* If there are no valid disks anymore, remove device. */ 222 if (LIST_EMPTY(&gp->consumer)) 223 g_shsec_destroy(sc, 1); 224 225 return (error); 226 227 fail: 228 /* If we fail here, backout all previous changes. */ 229 LIST_FOREACH(cp2, &gp->consumer, consumer) { 230 if (cp1 == cp2) 231 break; 232 g_access(cp2, -dr, -dw, -de); 233 } 234 return (error); 235 } 236 237 static void 238 g_shsec_xor1(uint32_t *src, uint32_t *dst, ssize_t len) 239 { 240 241 for (; len > 0; len -= sizeof(uint32_t), dst++) 242 *dst = *dst ^ *src++; 243 KASSERT(len == 0, ("len != 0 (len=%zd)", len)); 244 } 245 246 static void 247 g_shsec_done(struct bio *bp) 248 { 249 struct g_shsec_softc *sc; 250 struct bio *pbp; 251 252 pbp = bp->bio_parent; 253 sc = pbp->bio_to->geom->softc; 254 if (bp->bio_error == 0) 255 G_SHSEC_LOGREQ(2, bp, "Request done."); 256 else { 257 G_SHSEC_LOGREQ(0, bp, "Request failed (error=%d).", 258 bp->bio_error); 259 if (pbp->bio_error == 0) 260 pbp->bio_error = bp->bio_error; 261 } 262 if (pbp->bio_cmd == BIO_READ) { 263 if ((pbp->bio_pflags & G_SHSEC_BFLAG_FIRST) != 0) { 264 bcopy(bp->bio_data, pbp->bio_data, pbp->bio_length); 265 pbp->bio_pflags = 0; 266 } else { 267 g_shsec_xor1((uint32_t *)bp->bio_data, 268 (uint32_t *)pbp->bio_data, 269 (ssize_t)pbp->bio_length); 270 } 271 } 272 bzero(bp->bio_data, bp->bio_length); 273 uma_zfree(g_shsec_zone, bp->bio_data); 274 g_destroy_bio(bp); 275 pbp->bio_inbed++; 276 if (pbp->bio_children == pbp->bio_inbed) { 277 pbp->bio_completed = pbp->bio_length; 278 g_io_deliver(pbp, pbp->bio_error); 279 } 280 } 281 282 static void 283 g_shsec_xor2(uint32_t *rand, uint32_t *dst, ssize_t len) 284 { 285 286 for (; len > 0; len -= sizeof(uint32_t), dst++) { 287 *rand = arc4random(); 288 *dst = *dst ^ *rand++; 289 } 290 KASSERT(len == 0, ("len != 0 (len=%zd)", len)); 291 } 292 293 static void 294 g_shsec_start(struct bio *bp) 295 { 296 TAILQ_HEAD(, bio) queue = TAILQ_HEAD_INITIALIZER(queue); 297 struct g_shsec_softc *sc; 298 struct bio *cbp; 299 uint32_t *dst; 300 ssize_t len; 301 u_int no; 302 int error; 303 304 sc = bp->bio_to->geom->softc; 305 /* 306 * If sc == NULL, provider's error should be set and g_shsec_start() 307 * should not be called at all. 308 */ 309 KASSERT(sc != NULL, 310 ("Provider's error should be set (error=%d)(device=%s).", 311 bp->bio_to->error, bp->bio_to->name)); 312 313 G_SHSEC_LOGREQ(2, bp, "Request received."); 314 315 switch (bp->bio_cmd) { 316 case BIO_READ: 317 case BIO_WRITE: 318 case BIO_FLUSH: 319 case BIO_SPEEDUP: 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 sc = malloc(sizeof(*sc), M_SHSEC, M_WAITOK | M_ZERO); 548 gp->start = g_shsec_start; 549 gp->spoiled = g_shsec_orphan; 550 gp->orphan = g_shsec_orphan; 551 gp->access = g_shsec_access; 552 gp->dumpconf = g_shsec_dumpconf; 553 554 sc->sc_id = md->md_id; 555 sc->sc_ndisks = md->md_all; 556 sc->sc_disks = malloc(sizeof(struct g_consumer *) * sc->sc_ndisks, 557 M_SHSEC, M_WAITOK | M_ZERO); 558 for (no = 0; no < sc->sc_ndisks; no++) 559 sc->sc_disks[no] = NULL; 560 561 gp->softc = sc; 562 sc->sc_geom = gp; 563 sc->sc_provider = NULL; 564 565 G_SHSEC_DEBUG(0, "Device %s created (id=%u).", sc->sc_name, sc->sc_id); 566 567 return (gp); 568 } 569 570 static int 571 g_shsec_destroy(struct g_shsec_softc *sc, boolean_t force) 572 { 573 struct g_provider *pp; 574 struct g_geom *gp; 575 u_int no; 576 577 g_topology_assert(); 578 579 if (sc == NULL) 580 return (ENXIO); 581 582 pp = sc->sc_provider; 583 if (pp != NULL && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) { 584 if (force) { 585 G_SHSEC_DEBUG(0, "Device %s is still open, so it " 586 "can't be definitely removed.", pp->name); 587 } else { 588 G_SHSEC_DEBUG(1, 589 "Device %s is still open (r%dw%de%d).", pp->name, 590 pp->acr, pp->acw, pp->ace); 591 return (EBUSY); 592 } 593 } 594 595 for (no = 0; no < sc->sc_ndisks; no++) { 596 if (sc->sc_disks[no] != NULL) 597 g_shsec_remove_disk(sc->sc_disks[no]); 598 } 599 600 gp = sc->sc_geom; 601 gp->softc = NULL; 602 KASSERT(sc->sc_provider == NULL, ("Provider still exists? (device=%s)", 603 gp->name)); 604 free(sc->sc_disks, M_SHSEC); 605 free(sc, M_SHSEC); 606 607 pp = LIST_FIRST(&gp->provider); 608 if (pp == NULL || (pp->acr == 0 && pp->acw == 0 && pp->ace == 0)) 609 G_SHSEC_DEBUG(0, "Device %s destroyed.", gp->name); 610 611 g_wither_geom(gp, ENXIO); 612 613 return (0); 614 } 615 616 static int 617 g_shsec_destroy_geom(struct gctl_req *req __unused, struct g_class *mp __unused, 618 struct g_geom *gp) 619 { 620 struct g_shsec_softc *sc; 621 622 sc = gp->softc; 623 return (g_shsec_destroy(sc, 0)); 624 } 625 626 static struct g_geom * 627 g_shsec_taste(struct g_class *mp, struct g_provider *pp, int flags __unused) 628 { 629 struct g_shsec_metadata md; 630 struct g_shsec_softc *sc; 631 struct g_consumer *cp; 632 struct g_geom *gp; 633 int error; 634 635 g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name); 636 g_topology_assert(); 637 638 /* Skip providers that are already open for writing. */ 639 if (pp->acw > 0) 640 return (NULL); 641 642 G_SHSEC_DEBUG(3, "Tasting %s.", pp->name); 643 644 gp = g_new_geomf(mp, "shsec:taste"); 645 gp->start = g_shsec_start; 646 gp->access = g_shsec_access; 647 gp->orphan = g_shsec_orphan; 648 cp = g_new_consumer(gp); 649 g_attach(cp, pp); 650 error = g_shsec_read_metadata(cp, &md); 651 g_detach(cp); 652 g_destroy_consumer(cp); 653 g_destroy_geom(gp); 654 if (error != 0) 655 return (NULL); 656 gp = NULL; 657 658 if (strcmp(md.md_magic, G_SHSEC_MAGIC) != 0) 659 return (NULL); 660 if (md.md_version > G_SHSEC_VERSION) { 661 G_SHSEC_DEBUG(0, "Kernel module is too old to handle %s.\n", 662 pp->name); 663 return (NULL); 664 } 665 /* 666 * Backward compatibility: 667 */ 668 /* There was no md_provsize field in earlier versions of metadata. */ 669 if (md.md_version < 1) 670 md.md_provsize = pp->mediasize; 671 672 if (md.md_provider[0] != '\0' && 673 !g_compare_names(md.md_provider, pp->name)) 674 return (NULL); 675 if (md.md_provsize != pp->mediasize) 676 return (NULL); 677 678 /* 679 * Let's check if device already exists. 680 */ 681 sc = NULL; 682 LIST_FOREACH(gp, &mp->geom, geom) { 683 sc = gp->softc; 684 if (sc == NULL) 685 continue; 686 if (strcmp(md.md_name, sc->sc_name) != 0) 687 continue; 688 if (md.md_id != sc->sc_id) 689 continue; 690 break; 691 } 692 if (gp != NULL) { 693 G_SHSEC_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); 694 error = g_shsec_add_disk(sc, pp, md.md_no); 695 if (error != 0) { 696 G_SHSEC_DEBUG(0, "Cannot add disk %s to %s (error=%d).", 697 pp->name, gp->name, error); 698 return (NULL); 699 } 700 } else { 701 gp = g_shsec_create(mp, &md); 702 if (gp == NULL) { 703 G_SHSEC_DEBUG(0, "Cannot create device %s.", md.md_name); 704 return (NULL); 705 } 706 sc = gp->softc; 707 G_SHSEC_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); 708 error = g_shsec_add_disk(sc, pp, md.md_no); 709 if (error != 0) { 710 G_SHSEC_DEBUG(0, "Cannot add disk %s to %s (error=%d).", 711 pp->name, gp->name, error); 712 g_shsec_destroy(sc, 1); 713 return (NULL); 714 } 715 } 716 return (gp); 717 } 718 719 static struct g_shsec_softc * 720 g_shsec_find_device(struct g_class *mp, const char *name) 721 { 722 struct g_shsec_softc *sc; 723 struct g_geom *gp; 724 725 LIST_FOREACH(gp, &mp->geom, geom) { 726 sc = gp->softc; 727 if (sc == NULL) 728 continue; 729 if (strcmp(sc->sc_name, name) == 0) 730 return (sc); 731 } 732 return (NULL); 733 } 734 735 static void 736 g_shsec_ctl_destroy(struct gctl_req *req, struct g_class *mp) 737 { 738 struct g_shsec_softc *sc; 739 int *force, *nargs, error; 740 const char *name; 741 char param[16]; 742 u_int i; 743 744 g_topology_assert(); 745 746 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 747 if (nargs == NULL) { 748 gctl_error(req, "No '%s' argument.", "nargs"); 749 return; 750 } 751 if (*nargs <= 0) { 752 gctl_error(req, "Missing device(s)."); 753 return; 754 } 755 force = gctl_get_paraml(req, "force", sizeof(*force)); 756 if (force == NULL) { 757 gctl_error(req, "No '%s' argument.", "force"); 758 return; 759 } 760 761 for (i = 0; i < (u_int)*nargs; i++) { 762 snprintf(param, sizeof(param), "arg%u", i); 763 name = gctl_get_asciiparam(req, param); 764 if (name == NULL) { 765 gctl_error(req, "No 'arg%u' argument.", i); 766 return; 767 } 768 sc = g_shsec_find_device(mp, name); 769 if (sc == NULL) { 770 gctl_error(req, "No such device: %s.", name); 771 return; 772 } 773 error = g_shsec_destroy(sc, *force); 774 if (error != 0) { 775 gctl_error(req, "Cannot destroy device %s (error=%d).", 776 sc->sc_name, error); 777 return; 778 } 779 } 780 } 781 782 static void 783 g_shsec_config(struct gctl_req *req, struct g_class *mp, const char *verb) 784 { 785 uint32_t *version; 786 787 g_topology_assert(); 788 789 version = gctl_get_paraml(req, "version", sizeof(*version)); 790 if (version == NULL) { 791 gctl_error(req, "No '%s' argument.", "version"); 792 return; 793 } 794 if (*version != G_SHSEC_VERSION) { 795 gctl_error(req, "Userland and kernel parts are out of sync."); 796 return; 797 } 798 799 if (strcmp(verb, "stop") == 0) { 800 g_shsec_ctl_destroy(req, mp); 801 return; 802 } 803 804 gctl_error(req, "Unknown verb."); 805 } 806 807 static void 808 g_shsec_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, 809 struct g_consumer *cp, struct g_provider *pp) 810 { 811 struct g_shsec_softc *sc; 812 813 sc = gp->softc; 814 if (sc == NULL) 815 return; 816 if (pp != NULL) { 817 /* Nothing here. */ 818 } else if (cp != NULL) { 819 sbuf_printf(sb, "%s<Number>%u</Number>\n", indent, 820 (u_int)cp->index); 821 } else { 822 sbuf_printf(sb, "%s<ID>%u</ID>\n", indent, (u_int)sc->sc_id); 823 sbuf_printf(sb, "%s<Status>Total=%u, Online=%u</Status>\n", 824 indent, sc->sc_ndisks, g_shsec_nvalid(sc)); 825 sbuf_printf(sb, "%s<State>", indent); 826 if (sc->sc_provider != NULL && sc->sc_provider->error == 0) 827 sbuf_printf(sb, "UP"); 828 else 829 sbuf_printf(sb, "DOWN"); 830 sbuf_printf(sb, "</State>\n"); 831 } 832 } 833 834 DECLARE_GEOM_CLASS(g_shsec_class, g_shsec); 835 MODULE_VERSION(geom_shsec, 0); 836