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sys/geom/eli/g_eli.c
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1 /*- 2 * Copyright (c) 2005-2011 Pawel Jakub Dawidek <pawel@dawidek.net> 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: releng/11.2/sys/geom/eli/g_eli.c 332640 2018-04-17 02:18:04Z kevans $"); 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/cons.h> 33 #include <sys/kernel.h> 34 #include <sys/linker.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 <sys/eventhandler.h> 43 #include <sys/kthread.h> 44 #include <sys/proc.h> 45 #include <sys/sched.h> 46 #include <sys/smp.h> 47 #include <sys/uio.h> 48 #include <sys/vnode.h> 49 50 #include <vm/uma.h> 51 52 #include <geom/geom.h> 53 #include <geom/eli/g_eli.h> 54 #include <geom/eli/pkcs5v2.h> 55 56 #include <crypto/intake.h> 57 58 FEATURE(geom_eli, "GEOM crypto module"); 59 60 MALLOC_DEFINE(M_ELI, "eli data", "GEOM_ELI Data"); 61 62 SYSCTL_DECL(_kern_geom); 63 SYSCTL_NODE(_kern_geom, OID_AUTO, eli, CTLFLAG_RW, 0, "GEOM_ELI stuff"); 64 static int g_eli_version = G_ELI_VERSION; 65 SYSCTL_INT(_kern_geom_eli, OID_AUTO, version, CTLFLAG_RD, &g_eli_version, 0, 66 "GELI version"); 67 int g_eli_debug = 0; 68 SYSCTL_INT(_kern_geom_eli, OID_AUTO, debug, CTLFLAG_RWTUN, &g_eli_debug, 0, 69 "Debug level"); 70 static u_int g_eli_tries = 3; 71 SYSCTL_UINT(_kern_geom_eli, OID_AUTO, tries, CTLFLAG_RWTUN, &g_eli_tries, 0, 72 "Number of tries for entering the passphrase"); 73 static u_int g_eli_visible_passphrase = GETS_NOECHO; 74 SYSCTL_UINT(_kern_geom_eli, OID_AUTO, visible_passphrase, CTLFLAG_RWTUN, 75 &g_eli_visible_passphrase, 0, 76 "Visibility of passphrase prompt (0 = invisible, 1 = visible, 2 = asterisk)"); 77 u_int g_eli_overwrites = G_ELI_OVERWRITES; 78 SYSCTL_UINT(_kern_geom_eli, OID_AUTO, overwrites, CTLFLAG_RWTUN, &g_eli_overwrites, 79 0, "Number of times on-disk keys should be overwritten when destroying them"); 80 static u_int g_eli_threads = 0; 81 SYSCTL_UINT(_kern_geom_eli, OID_AUTO, threads, CTLFLAG_RWTUN, &g_eli_threads, 0, 82 "Number of threads doing crypto work"); 83 u_int g_eli_batch = 0; 84 SYSCTL_UINT(_kern_geom_eli, OID_AUTO, batch, CTLFLAG_RWTUN, &g_eli_batch, 0, 85 "Use crypto operations batching"); 86 87 /* 88 * Passphrase cached during boot, in order to be more user-friendly if 89 * there are multiple providers using the same passphrase. 90 */ 91 static char cached_passphrase[256]; 92 static u_int g_eli_boot_passcache = 1; 93 TUNABLE_INT("kern.geom.eli.boot_passcache", &g_eli_boot_passcache); 94 SYSCTL_UINT(_kern_geom_eli, OID_AUTO, boot_passcache, CTLFLAG_RD, 95 &g_eli_boot_passcache, 0, 96 "Passphrases are cached during boot process for possible reuse"); 97 static void 98 fetch_loader_passphrase(void * dummy) 99 { 100 char * env_passphrase; 101 102 KASSERT(dynamic_kenv, ("need dynamic kenv")); 103 104 if ((env_passphrase = kern_getenv("kern.geom.eli.passphrase")) != NULL) { 105 /* Extract passphrase from the environment. */ 106 strlcpy(cached_passphrase, env_passphrase, 107 sizeof(cached_passphrase)); 108 freeenv(env_passphrase); 109 110 /* Wipe the passphrase from the environment. */ 111 kern_unsetenv("kern.geom.eli.passphrase"); 112 } 113 } 114 SYSINIT(geli_fetch_loader_passphrase, SI_SUB_KMEM + 1, SI_ORDER_ANY, 115 fetch_loader_passphrase, NULL); 116 117 static void 118 zero_boot_passcache(void) 119 { 120 121 explicit_bzero(cached_passphrase, sizeof(cached_passphrase)); 122 } 123 124 static void 125 zero_geli_intake_keys(void) 126 { 127 struct keybuf *keybuf; 128 int i; 129 130 if ((keybuf = get_keybuf()) != NULL) { 131 /* Scan the key buffer, clear all GELI keys. */ 132 for (i = 0; i < keybuf->kb_nents; i++) { 133 if (keybuf->kb_ents[i].ke_type == KEYBUF_TYPE_GELI) { 134 explicit_bzero(keybuf->kb_ents[i].ke_data, 135 sizeof(keybuf->kb_ents[i].ke_data)); 136 keybuf->kb_ents[i].ke_type = KEYBUF_TYPE_NONE; 137 } 138 } 139 } 140 } 141 142 static void 143 zero_intake_passcache(void *dummy) 144 { 145 zero_boot_passcache(); 146 zero_geli_intake_keys(); 147 } 148 EVENTHANDLER_DEFINE(mountroot, zero_intake_passcache, NULL, 0); 149 150 static eventhandler_tag g_eli_pre_sync = NULL; 151 152 static int g_eli_destroy_geom(struct gctl_req *req, struct g_class *mp, 153 struct g_geom *gp); 154 static void g_eli_init(struct g_class *mp); 155 static void g_eli_fini(struct g_class *mp); 156 157 static g_taste_t g_eli_taste; 158 static g_dumpconf_t g_eli_dumpconf; 159 160 struct g_class g_eli_class = { 161 .name = G_ELI_CLASS_NAME, 162 .version = G_VERSION, 163 .ctlreq = g_eli_config, 164 .taste = g_eli_taste, 165 .destroy_geom = g_eli_destroy_geom, 166 .init = g_eli_init, 167 .fini = g_eli_fini 168 }; 169 170 171 /* 172 * Code paths: 173 * BIO_READ: 174 * g_eli_start -> g_eli_crypto_read -> g_io_request -> g_eli_read_done -> g_eli_crypto_run -> g_eli_crypto_read_done -> g_io_deliver 175 * BIO_WRITE: 176 * g_eli_start -> g_eli_crypto_run -> g_eli_crypto_write_done -> g_io_request -> g_eli_write_done -> g_io_deliver 177 */ 178 179 180 /* 181 * EAGAIN from crypto(9) means, that we were probably balanced to another crypto 182 * accelerator or something like this. 183 * The function updates the SID and rerun the operation. 184 */ 185 int 186 g_eli_crypto_rerun(struct cryptop *crp) 187 { 188 struct g_eli_softc *sc; 189 struct g_eli_worker *wr; 190 struct bio *bp; 191 int error; 192 193 bp = (struct bio *)crp->crp_opaque; 194 sc = bp->bio_to->geom->softc; 195 LIST_FOREACH(wr, &sc->sc_workers, w_next) { 196 if (wr->w_number == bp->bio_pflags) 197 break; 198 } 199 KASSERT(wr != NULL, ("Invalid worker (%u).", bp->bio_pflags)); 200 G_ELI_DEBUG(1, "Rerunning crypto %s request (sid: %ju -> %ju).", 201 bp->bio_cmd == BIO_READ ? "READ" : "WRITE", (uintmax_t)wr->w_sid, 202 (uintmax_t)crp->crp_sid); 203 wr->w_sid = crp->crp_sid; 204 crp->crp_etype = 0; 205 error = crypto_dispatch(crp); 206 if (error == 0) 207 return (0); 208 G_ELI_DEBUG(1, "%s: crypto_dispatch() returned %d.", __func__, error); 209 crp->crp_etype = error; 210 return (error); 211 } 212 213 static void 214 g_eli_getattr_done(struct bio *bp) 215 { 216 if (bp->bio_error == 0 && 217 !strcmp(bp->bio_attribute, "GEOM::physpath")) { 218 strlcat(bp->bio_data, "/eli", bp->bio_length); 219 } 220 g_std_done(bp); 221 } 222 223 /* 224 * The function is called afer reading encrypted data from the provider. 225 * 226 * g_eli_start -> g_eli_crypto_read -> g_io_request -> G_ELI_READ_DONE -> g_eli_crypto_run -> g_eli_crypto_read_done -> g_io_deliver 227 */ 228 void 229 g_eli_read_done(struct bio *bp) 230 { 231 struct g_eli_softc *sc; 232 struct bio *pbp; 233 234 G_ELI_LOGREQ(2, bp, "Request done."); 235 pbp = bp->bio_parent; 236 if (pbp->bio_error == 0 && bp->bio_error != 0) 237 pbp->bio_error = bp->bio_error; 238 g_destroy_bio(bp); 239 /* 240 * Do we have all sectors already? 241 */ 242 pbp->bio_inbed++; 243 if (pbp->bio_inbed < pbp->bio_children) 244 return; 245 sc = pbp->bio_to->geom->softc; 246 if (pbp->bio_error != 0) { 247 G_ELI_LOGREQ(0, pbp, "%s() failed (error=%d)", __func__, 248 pbp->bio_error); 249 pbp->bio_completed = 0; 250 if (pbp->bio_driver2 != NULL) { 251 free(pbp->bio_driver2, M_ELI); 252 pbp->bio_driver2 = NULL; 253 } 254 g_io_deliver(pbp, pbp->bio_error); 255 atomic_subtract_int(&sc->sc_inflight, 1); 256 return; 257 } 258 mtx_lock(&sc->sc_queue_mtx); 259 bioq_insert_tail(&sc->sc_queue, pbp); 260 mtx_unlock(&sc->sc_queue_mtx); 261 wakeup(sc); 262 } 263 264 /* 265 * The function is called after we encrypt and write data. 266 * 267 * g_eli_start -> g_eli_crypto_run -> g_eli_crypto_write_done -> g_io_request -> G_ELI_WRITE_DONE -> g_io_deliver 268 */ 269 void 270 g_eli_write_done(struct bio *bp) 271 { 272 struct g_eli_softc *sc; 273 struct bio *pbp; 274 275 G_ELI_LOGREQ(2, bp, "Request done."); 276 pbp = bp->bio_parent; 277 if (pbp->bio_error == 0 && bp->bio_error != 0) 278 pbp->bio_error = bp->bio_error; 279 g_destroy_bio(bp); 280 /* 281 * Do we have all sectors already? 282 */ 283 pbp->bio_inbed++; 284 if (pbp->bio_inbed < pbp->bio_children) 285 return; 286 free(pbp->bio_driver2, M_ELI); 287 pbp->bio_driver2 = NULL; 288 if (pbp->bio_error != 0) { 289 G_ELI_LOGREQ(0, pbp, "%s() failed (error=%d)", __func__, 290 pbp->bio_error); 291 pbp->bio_completed = 0; 292 } else 293 pbp->bio_completed = pbp->bio_length; 294 295 /* 296 * Write is finished, send it up. 297 */ 298 sc = pbp->bio_to->geom->softc; 299 g_io_deliver(pbp, pbp->bio_error); 300 atomic_subtract_int(&sc->sc_inflight, 1); 301 } 302 303 /* 304 * This function should never be called, but GEOM made as it set ->orphan() 305 * method for every geom. 306 */ 307 static void 308 g_eli_orphan_spoil_assert(struct g_consumer *cp) 309 { 310 311 panic("Function %s() called for %s.", __func__, cp->geom->name); 312 } 313 314 static void 315 g_eli_orphan(struct g_consumer *cp) 316 { 317 struct g_eli_softc *sc; 318 319 g_topology_assert(); 320 sc = cp->geom->softc; 321 if (sc == NULL) 322 return; 323 g_eli_destroy(sc, TRUE); 324 } 325 326 /* 327 * BIO_READ: 328 * G_ELI_START -> g_eli_crypto_read -> g_io_request -> g_eli_read_done -> g_eli_crypto_run -> g_eli_crypto_read_done -> g_io_deliver 329 * BIO_WRITE: 330 * G_ELI_START -> g_eli_crypto_run -> g_eli_crypto_write_done -> g_io_request -> g_eli_write_done -> g_io_deliver 331 */ 332 static void 333 g_eli_start(struct bio *bp) 334 { 335 struct g_eli_softc *sc; 336 struct g_consumer *cp; 337 struct bio *cbp; 338 339 sc = bp->bio_to->geom->softc; 340 KASSERT(sc != NULL, 341 ("Provider's error should be set (error=%d)(device=%s).", 342 bp->bio_to->error, bp->bio_to->name)); 343 G_ELI_LOGREQ(2, bp, "Request received."); 344 345 switch (bp->bio_cmd) { 346 case BIO_READ: 347 case BIO_WRITE: 348 case BIO_GETATTR: 349 case BIO_FLUSH: 350 case BIO_ZONE: 351 break; 352 case BIO_DELETE: 353 /* 354 * If the user hasn't set the NODELETE flag, we just pass 355 * it down the stack and let the layers beneath us do (or 356 * not) whatever they do with it. If they have, we 357 * reject it. A possible extension would be an 358 * additional flag to take it as a hint to shred the data 359 * with [multiple?] overwrites. 360 */ 361 if (!(sc->sc_flags & G_ELI_FLAG_NODELETE)) 362 break; 363 default: 364 g_io_deliver(bp, EOPNOTSUPP); 365 return; 366 } 367 cbp = g_clone_bio(bp); 368 if (cbp == NULL) { 369 g_io_deliver(bp, ENOMEM); 370 return; 371 } 372 bp->bio_driver1 = cbp; 373 bp->bio_pflags = G_ELI_NEW_BIO; 374 switch (bp->bio_cmd) { 375 case BIO_READ: 376 if (!(sc->sc_flags & G_ELI_FLAG_AUTH)) { 377 g_eli_crypto_read(sc, bp, 0); 378 break; 379 } 380 /* FALLTHROUGH */ 381 case BIO_WRITE: 382 mtx_lock(&sc->sc_queue_mtx); 383 bioq_insert_tail(&sc->sc_queue, bp); 384 mtx_unlock(&sc->sc_queue_mtx); 385 wakeup(sc); 386 break; 387 case BIO_GETATTR: 388 case BIO_FLUSH: 389 case BIO_DELETE: 390 case BIO_ZONE: 391 if (bp->bio_cmd == BIO_GETATTR) 392 cbp->bio_done = g_eli_getattr_done; 393 else 394 cbp->bio_done = g_std_done; 395 cp = LIST_FIRST(&sc->sc_geom->consumer); 396 cbp->bio_to = cp->provider; 397 G_ELI_LOGREQ(2, cbp, "Sending request."); 398 g_io_request(cbp, cp); 399 break; 400 } 401 } 402 403 static int 404 g_eli_newsession(struct g_eli_worker *wr) 405 { 406 struct g_eli_softc *sc; 407 struct cryptoini crie, cria; 408 int error; 409 410 sc = wr->w_softc; 411 412 bzero(&crie, sizeof(crie)); 413 crie.cri_alg = sc->sc_ealgo; 414 crie.cri_klen = sc->sc_ekeylen; 415 if (sc->sc_ealgo == CRYPTO_AES_XTS) 416 crie.cri_klen <<= 1; 417 if ((sc->sc_flags & G_ELI_FLAG_FIRST_KEY) != 0) { 418 crie.cri_key = g_eli_key_hold(sc, 0, 419 LIST_FIRST(&sc->sc_geom->consumer)->provider->sectorsize); 420 } else { 421 crie.cri_key = sc->sc_ekey; 422 } 423 if (sc->sc_flags & G_ELI_FLAG_AUTH) { 424 bzero(&cria, sizeof(cria)); 425 cria.cri_alg = sc->sc_aalgo; 426 cria.cri_klen = sc->sc_akeylen; 427 cria.cri_key = sc->sc_akey; 428 crie.cri_next = &cria; 429 } 430 431 switch (sc->sc_crypto) { 432 case G_ELI_CRYPTO_SW: 433 error = crypto_newsession(&wr->w_sid, &crie, 434 CRYPTOCAP_F_SOFTWARE); 435 break; 436 case G_ELI_CRYPTO_HW: 437 error = crypto_newsession(&wr->w_sid, &crie, 438 CRYPTOCAP_F_HARDWARE); 439 break; 440 case G_ELI_CRYPTO_UNKNOWN: 441 error = crypto_newsession(&wr->w_sid, &crie, 442 CRYPTOCAP_F_HARDWARE); 443 if (error == 0) { 444 mtx_lock(&sc->sc_queue_mtx); 445 if (sc->sc_crypto == G_ELI_CRYPTO_UNKNOWN) 446 sc->sc_crypto = G_ELI_CRYPTO_HW; 447 mtx_unlock(&sc->sc_queue_mtx); 448 } else { 449 error = crypto_newsession(&wr->w_sid, &crie, 450 CRYPTOCAP_F_SOFTWARE); 451 mtx_lock(&sc->sc_queue_mtx); 452 if (sc->sc_crypto == G_ELI_CRYPTO_UNKNOWN) 453 sc->sc_crypto = G_ELI_CRYPTO_SW; 454 mtx_unlock(&sc->sc_queue_mtx); 455 } 456 break; 457 default: 458 panic("%s: invalid condition", __func__); 459 } 460 461 if ((sc->sc_flags & G_ELI_FLAG_FIRST_KEY) != 0) 462 g_eli_key_drop(sc, crie.cri_key); 463 464 return (error); 465 } 466 467 static void 468 g_eli_freesession(struct g_eli_worker *wr) 469 { 470 471 crypto_freesession(wr->w_sid); 472 } 473 474 static void 475 g_eli_cancel(struct g_eli_softc *sc) 476 { 477 struct bio *bp; 478 479 mtx_assert(&sc->sc_queue_mtx, MA_OWNED); 480 481 while ((bp = bioq_takefirst(&sc->sc_queue)) != NULL) { 482 KASSERT(bp->bio_pflags == G_ELI_NEW_BIO, 483 ("Not new bio when canceling (bp=%p).", bp)); 484 g_io_deliver(bp, ENXIO); 485 } 486 } 487 488 static struct bio * 489 g_eli_takefirst(struct g_eli_softc *sc) 490 { 491 struct bio *bp; 492 493 mtx_assert(&sc->sc_queue_mtx, MA_OWNED); 494 495 if (!(sc->sc_flags & G_ELI_FLAG_SUSPEND)) 496 return (bioq_takefirst(&sc->sc_queue)); 497 /* 498 * Device suspended, so we skip new I/O requests. 499 */ 500 TAILQ_FOREACH(bp, &sc->sc_queue.queue, bio_queue) { 501 if (bp->bio_pflags != G_ELI_NEW_BIO) 502 break; 503 } 504 if (bp != NULL) 505 bioq_remove(&sc->sc_queue, bp); 506 return (bp); 507 } 508 509 /* 510 * This is the main function for kernel worker thread when we don't have 511 * hardware acceleration and we have to do cryptography in software. 512 * Dedicated thread is needed, so we don't slow down g_up/g_down GEOM 513 * threads with crypto work. 514 */ 515 static void 516 g_eli_worker(void *arg) 517 { 518 struct g_eli_softc *sc; 519 struct g_eli_worker *wr; 520 struct bio *bp; 521 int error; 522 523 wr = arg; 524 sc = wr->w_softc; 525 #ifdef EARLY_AP_STARTUP 526 MPASS(!sc->sc_cpubind || smp_started); 527 #elif defined(SMP) 528 /* Before sched_bind() to a CPU, wait for all CPUs to go on-line. */ 529 if (sc->sc_cpubind) { 530 while (!smp_started) 531 tsleep(wr, 0, "geli:smp", hz / 4); 532 } 533 #endif 534 thread_lock(curthread); 535 sched_prio(curthread, PUSER); 536 if (sc->sc_cpubind) 537 sched_bind(curthread, wr->w_number % mp_ncpus); 538 thread_unlock(curthread); 539 540 G_ELI_DEBUG(1, "Thread %s started.", curthread->td_proc->p_comm); 541 542 for (;;) { 543 mtx_lock(&sc->sc_queue_mtx); 544 again: 545 bp = g_eli_takefirst(sc); 546 if (bp == NULL) { 547 if (sc->sc_flags & G_ELI_FLAG_DESTROY) { 548 g_eli_cancel(sc); 549 LIST_REMOVE(wr, w_next); 550 g_eli_freesession(wr); 551 free(wr, M_ELI); 552 G_ELI_DEBUG(1, "Thread %s exiting.", 553 curthread->td_proc->p_comm); 554 wakeup(&sc->sc_workers); 555 mtx_unlock(&sc->sc_queue_mtx); 556 kproc_exit(0); 557 } 558 while (sc->sc_flags & G_ELI_FLAG_SUSPEND) { 559 if (sc->sc_inflight > 0) { 560 G_ELI_DEBUG(0, "inflight=%d", 561 sc->sc_inflight); 562 /* 563 * We still have inflight BIOs, so 564 * sleep and retry. 565 */ 566 msleep(sc, &sc->sc_queue_mtx, PRIBIO, 567 "geli:inf", hz / 5); 568 goto again; 569 } 570 /* 571 * Suspend requested, mark the worker as 572 * suspended and go to sleep. 573 */ 574 if (wr->w_active) { 575 g_eli_freesession(wr); 576 wr->w_active = FALSE; 577 } 578 wakeup(&sc->sc_workers); 579 msleep(sc, &sc->sc_queue_mtx, PRIBIO, 580 "geli:suspend", 0); 581 if (!wr->w_active && 582 !(sc->sc_flags & G_ELI_FLAG_SUSPEND)) { 583 error = g_eli_newsession(wr); 584 KASSERT(error == 0, 585 ("g_eli_newsession() failed on resume (error=%d)", 586 error)); 587 wr->w_active = TRUE; 588 } 589 goto again; 590 } 591 msleep(sc, &sc->sc_queue_mtx, PDROP, "geli:w", 0); 592 continue; 593 } 594 if (bp->bio_pflags == G_ELI_NEW_BIO) 595 atomic_add_int(&sc->sc_inflight, 1); 596 mtx_unlock(&sc->sc_queue_mtx); 597 if (bp->bio_pflags == G_ELI_NEW_BIO) { 598 bp->bio_pflags = 0; 599 if (sc->sc_flags & G_ELI_FLAG_AUTH) { 600 if (bp->bio_cmd == BIO_READ) 601 g_eli_auth_read(sc, bp); 602 else 603 g_eli_auth_run(wr, bp); 604 } else { 605 if (bp->bio_cmd == BIO_READ) 606 g_eli_crypto_read(sc, bp, 1); 607 else 608 g_eli_crypto_run(wr, bp); 609 } 610 } else { 611 if (sc->sc_flags & G_ELI_FLAG_AUTH) 612 g_eli_auth_run(wr, bp); 613 else 614 g_eli_crypto_run(wr, bp); 615 } 616 } 617 } 618 619 int 620 g_eli_read_metadata(struct g_class *mp, struct g_provider *pp, 621 struct g_eli_metadata *md) 622 { 623 struct g_geom *gp; 624 struct g_consumer *cp; 625 u_char *buf = NULL; 626 int error; 627 628 g_topology_assert(); 629 630 gp = g_new_geomf(mp, "eli:taste"); 631 gp->start = g_eli_start; 632 gp->access = g_std_access; 633 /* 634 * g_eli_read_metadata() is always called from the event thread. 635 * Our geom is created and destroyed in the same event, so there 636 * could be no orphan nor spoil event in the meantime. 637 */ 638 gp->orphan = g_eli_orphan_spoil_assert; 639 gp->spoiled = g_eli_orphan_spoil_assert; 640 cp = g_new_consumer(gp); 641 error = g_attach(cp, pp); 642 if (error != 0) 643 goto end; 644 error = g_access(cp, 1, 0, 0); 645 if (error != 0) 646 goto end; 647 g_topology_unlock(); 648 buf = g_read_data(cp, pp->mediasize - pp->sectorsize, pp->sectorsize, 649 &error); 650 g_topology_lock(); 651 if (buf == NULL) 652 goto end; 653 error = eli_metadata_decode(buf, md); 654 if (error != 0) 655 goto end; 656 /* Metadata was read and decoded successfully. */ 657 end: 658 if (buf != NULL) 659 g_free(buf); 660 if (cp->provider != NULL) { 661 if (cp->acr == 1) 662 g_access(cp, -1, 0, 0); 663 g_detach(cp); 664 } 665 g_destroy_consumer(cp); 666 g_destroy_geom(gp); 667 return (error); 668 } 669 670 /* 671 * The function is called when we had last close on provider and user requested 672 * to close it when this situation occur. 673 */ 674 static void 675 g_eli_last_close(void *arg, int flags __unused) 676 { 677 struct g_geom *gp; 678 char gpname[64]; 679 int error; 680 681 g_topology_assert(); 682 gp = arg; 683 strlcpy(gpname, gp->name, sizeof(gpname)); 684 error = g_eli_destroy(gp->softc, TRUE); 685 KASSERT(error == 0, ("Cannot detach %s on last close (error=%d).", 686 gpname, error)); 687 G_ELI_DEBUG(0, "Detached %s on last close.", gpname); 688 } 689 690 int 691 g_eli_access(struct g_provider *pp, int dr, int dw, int de) 692 { 693 struct g_eli_softc *sc; 694 struct g_geom *gp; 695 696 gp = pp->geom; 697 sc = gp->softc; 698 699 if (dw > 0) { 700 if (sc->sc_flags & G_ELI_FLAG_RO) { 701 /* Deny write attempts. */ 702 return (EROFS); 703 } 704 /* Someone is opening us for write, we need to remember that. */ 705 sc->sc_flags |= G_ELI_FLAG_WOPEN; 706 return (0); 707 } 708 /* Is this the last close? */ 709 if (pp->acr + dr > 0 || pp->acw + dw > 0 || pp->ace + de > 0) 710 return (0); 711 712 /* 713 * Automatically detach on last close if requested. 714 */ 715 if ((sc->sc_flags & G_ELI_FLAG_RW_DETACH) || 716 (sc->sc_flags & G_ELI_FLAG_WOPEN)) { 717 g_post_event(g_eli_last_close, gp, M_WAITOK, NULL); 718 } 719 return (0); 720 } 721 722 static int 723 g_eli_cpu_is_disabled(int cpu) 724 { 725 #ifdef SMP 726 return (CPU_ISSET(cpu, &hlt_cpus_mask)); 727 #else 728 return (0); 729 #endif 730 } 731 732 struct g_geom * 733 g_eli_create(struct gctl_req *req, struct g_class *mp, struct g_provider *bpp, 734 const struct g_eli_metadata *md, const u_char *mkey, int nkey) 735 { 736 struct g_eli_softc *sc; 737 struct g_eli_worker *wr; 738 struct g_geom *gp; 739 struct g_provider *pp; 740 struct g_consumer *cp; 741 u_int i, threads; 742 int error; 743 744 G_ELI_DEBUG(1, "Creating device %s%s.", bpp->name, G_ELI_SUFFIX); 745 746 gp = g_new_geomf(mp, "%s%s", bpp->name, G_ELI_SUFFIX); 747 sc = malloc(sizeof(*sc), M_ELI, M_WAITOK | M_ZERO); 748 gp->start = g_eli_start; 749 /* 750 * Spoiling can happen even though we have the provider open 751 * exclusively, e.g. through media change events. 752 */ 753 gp->spoiled = g_eli_orphan; 754 gp->orphan = g_eli_orphan; 755 gp->dumpconf = g_eli_dumpconf; 756 /* 757 * If detach-on-last-close feature is not enabled and we don't operate 758 * on read-only provider, we can simply use g_std_access(). 759 */ 760 if (md->md_flags & (G_ELI_FLAG_WO_DETACH | G_ELI_FLAG_RO)) 761 gp->access = g_eli_access; 762 else 763 gp->access = g_std_access; 764 765 eli_metadata_softc(sc, md, bpp->sectorsize, bpp->mediasize); 766 sc->sc_nkey = nkey; 767 768 gp->softc = sc; 769 sc->sc_geom = gp; 770 771 bioq_init(&sc->sc_queue); 772 mtx_init(&sc->sc_queue_mtx, "geli:queue", NULL, MTX_DEF); 773 mtx_init(&sc->sc_ekeys_lock, "geli:ekeys", NULL, MTX_DEF); 774 775 pp = NULL; 776 cp = g_new_consumer(gp); 777 error = g_attach(cp, bpp); 778 if (error != 0) { 779 if (req != NULL) { 780 gctl_error(req, "Cannot attach to %s (error=%d).", 781 bpp->name, error); 782 } else { 783 G_ELI_DEBUG(1, "Cannot attach to %s (error=%d).", 784 bpp->name, error); 785 } 786 goto failed; 787 } 788 /* 789 * Keep provider open all the time, so we can run critical tasks, 790 * like Master Keys deletion, without wondering if we can open 791 * provider or not. 792 * We don't open provider for writing only when user requested read-only 793 * access. 794 */ 795 if (sc->sc_flags & G_ELI_FLAG_RO) 796 error = g_access(cp, 1, 0, 1); 797 else 798 error = g_access(cp, 1, 1, 1); 799 if (error != 0) { 800 if (req != NULL) { 801 gctl_error(req, "Cannot access %s (error=%d).", 802 bpp->name, error); 803 } else { 804 G_ELI_DEBUG(1, "Cannot access %s (error=%d).", 805 bpp->name, error); 806 } 807 goto failed; 808 } 809 810 /* 811 * Remember the keys in our softc structure. 812 */ 813 g_eli_mkey_propagate(sc, mkey); 814 815 LIST_INIT(&sc->sc_workers); 816 817 threads = g_eli_threads; 818 if (threads == 0) 819 threads = mp_ncpus; 820 sc->sc_cpubind = (mp_ncpus > 1 && threads == mp_ncpus); 821 for (i = 0; i < threads; i++) { 822 if (g_eli_cpu_is_disabled(i)) { 823 G_ELI_DEBUG(1, "%s: CPU %u disabled, skipping.", 824 bpp->name, i); 825 continue; 826 } 827 wr = malloc(sizeof(*wr), M_ELI, M_WAITOK | M_ZERO); 828 wr->w_softc = sc; 829 wr->w_number = i; 830 wr->w_active = TRUE; 831 832 error = g_eli_newsession(wr); 833 if (error != 0) { 834 free(wr, M_ELI); 835 if (req != NULL) { 836 gctl_error(req, "Cannot set up crypto session " 837 "for %s (error=%d).", bpp->name, error); 838 } else { 839 G_ELI_DEBUG(1, "Cannot set up crypto session " 840 "for %s (error=%d).", bpp->name, error); 841 } 842 goto failed; 843 } 844 845 error = kproc_create(g_eli_worker, wr, &wr->w_proc, 0, 0, 846 "g_eli[%u] %s", i, bpp->name); 847 if (error != 0) { 848 g_eli_freesession(wr); 849 free(wr, M_ELI); 850 if (req != NULL) { 851 gctl_error(req, "Cannot create kernel thread " 852 "for %s (error=%d).", bpp->name, error); 853 } else { 854 G_ELI_DEBUG(1, "Cannot create kernel thread " 855 "for %s (error=%d).", bpp->name, error); 856 } 857 goto failed; 858 } 859 LIST_INSERT_HEAD(&sc->sc_workers, wr, w_next); 860 } 861 862 /* 863 * Create decrypted provider. 864 */ 865 pp = g_new_providerf(gp, "%s%s", bpp->name, G_ELI_SUFFIX); 866 pp->mediasize = sc->sc_mediasize; 867 pp->sectorsize = sc->sc_sectorsize; 868 869 g_error_provider(pp, 0); 870 871 G_ELI_DEBUG(0, "Device %s created.", pp->name); 872 G_ELI_DEBUG(0, "Encryption: %s %u", g_eli_algo2str(sc->sc_ealgo), 873 sc->sc_ekeylen); 874 if (sc->sc_flags & G_ELI_FLAG_AUTH) 875 G_ELI_DEBUG(0, " Integrity: %s", g_eli_algo2str(sc->sc_aalgo)); 876 G_ELI_DEBUG(0, " Crypto: %s", 877 sc->sc_crypto == G_ELI_CRYPTO_SW ? "software" : "hardware"); 878 return (gp); 879 failed: 880 mtx_lock(&sc->sc_queue_mtx); 881 sc->sc_flags |= G_ELI_FLAG_DESTROY; 882 wakeup(sc); 883 /* 884 * Wait for kernel threads self destruction. 885 */ 886 while (!LIST_EMPTY(&sc->sc_workers)) { 887 msleep(&sc->sc_workers, &sc->sc_queue_mtx, PRIBIO, 888 "geli:destroy", 0); 889 } 890 mtx_destroy(&sc->sc_queue_mtx); 891 if (cp->provider != NULL) { 892 if (cp->acr == 1) 893 g_access(cp, -1, -1, -1); 894 g_detach(cp); 895 } 896 g_destroy_consumer(cp); 897 g_destroy_geom(gp); 898 g_eli_key_destroy(sc); 899 bzero(sc, sizeof(*sc)); 900 free(sc, M_ELI); 901 return (NULL); 902 } 903 904 int 905 g_eli_destroy(struct g_eli_softc *sc, boolean_t force) 906 { 907 struct g_geom *gp; 908 struct g_provider *pp; 909 910 g_topology_assert(); 911 912 if (sc == NULL) 913 return (ENXIO); 914 915 gp = sc->sc_geom; 916 pp = LIST_FIRST(&gp->provider); 917 if (pp != NULL && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) { 918 if (force) { 919 G_ELI_DEBUG(1, "Device %s is still open, so it " 920 "cannot be definitely removed.", pp->name); 921 sc->sc_flags |= G_ELI_FLAG_RW_DETACH; 922 gp->access = g_eli_access; 923 g_wither_provider(pp, ENXIO); 924 return (EBUSY); 925 } else { 926 G_ELI_DEBUG(1, 927 "Device %s is still open (r%dw%de%d).", pp->name, 928 pp->acr, pp->acw, pp->ace); 929 return (EBUSY); 930 } 931 } 932 933 mtx_lock(&sc->sc_queue_mtx); 934 sc->sc_flags |= G_ELI_FLAG_DESTROY; 935 wakeup(sc); 936 while (!LIST_EMPTY(&sc->sc_workers)) { 937 msleep(&sc->sc_workers, &sc->sc_queue_mtx, PRIBIO, 938 "geli:destroy", 0); 939 } 940 mtx_destroy(&sc->sc_queue_mtx); 941 gp->softc = NULL; 942 g_eli_key_destroy(sc); 943 bzero(sc, sizeof(*sc)); 944 free(sc, M_ELI); 945 946 if (pp == NULL || (pp->acr == 0 && pp->acw == 0 && pp->ace == 0)) 947 G_ELI_DEBUG(0, "Device %s destroyed.", gp->name); 948 g_wither_geom_close(gp, ENXIO); 949 950 return (0); 951 } 952 953 static int 954 g_eli_destroy_geom(struct gctl_req *req __unused, 955 struct g_class *mp __unused, struct g_geom *gp) 956 { 957 struct g_eli_softc *sc; 958 959 sc = gp->softc; 960 return (g_eli_destroy(sc, FALSE)); 961 } 962 963 static int 964 g_eli_keyfiles_load(struct hmac_ctx *ctx, const char *provider) 965 { 966 u_char *keyfile, *data; 967 char *file, name[64]; 968 size_t size; 969 int i; 970 971 for (i = 0; ; i++) { 972 snprintf(name, sizeof(name), "%s:geli_keyfile%d", provider, i); 973 keyfile = preload_search_by_type(name); 974 if (keyfile == NULL && i == 0) { 975 /* 976 * If there is only one keyfile, allow simpler name. 977 */ 978 snprintf(name, sizeof(name), "%s:geli_keyfile", provider); 979 keyfile = preload_search_by_type(name); 980 } 981 if (keyfile == NULL) 982 return (i); /* Return number of loaded keyfiles. */ 983 data = preload_fetch_addr(keyfile); 984 if (data == NULL) { 985 G_ELI_DEBUG(0, "Cannot find key file data for %s.", 986 name); 987 return (0); 988 } 989 size = preload_fetch_size(keyfile); 990 if (size == 0) { 991 G_ELI_DEBUG(0, "Cannot find key file size for %s.", 992 name); 993 return (0); 994 } 995 file = preload_search_info(keyfile, MODINFO_NAME); 996 if (file == NULL) { 997 G_ELI_DEBUG(0, "Cannot find key file name for %s.", 998 name); 999 return (0); 1000 } 1001 G_ELI_DEBUG(1, "Loaded keyfile %s for %s (type: %s).", file, 1002 provider, name); 1003 g_eli_crypto_hmac_update(ctx, data, size); 1004 } 1005 } 1006 1007 static void 1008 g_eli_keyfiles_clear(const char *provider) 1009 { 1010 u_char *keyfile, *data; 1011 char name[64]; 1012 size_t size; 1013 int i; 1014 1015 for (i = 0; ; i++) { 1016 snprintf(name, sizeof(name), "%s:geli_keyfile%d", provider, i); 1017 keyfile = preload_search_by_type(name); 1018 if (keyfile == NULL) 1019 return; 1020 data = preload_fetch_addr(keyfile); 1021 size = preload_fetch_size(keyfile); 1022 if (data != NULL && size != 0) 1023 bzero(data, size); 1024 } 1025 } 1026 1027 /* 1028 * Tasting is only made on boot. 1029 * We detect providers which should be attached before root is mounted. 1030 */ 1031 static struct g_geom * 1032 g_eli_taste(struct g_class *mp, struct g_provider *pp, int flags __unused) 1033 { 1034 struct g_eli_metadata md; 1035 struct g_geom *gp; 1036 struct hmac_ctx ctx; 1037 char passphrase[256]; 1038 u_char key[G_ELI_USERKEYLEN], mkey[G_ELI_DATAIVKEYLEN]; 1039 u_int i, nkey, nkeyfiles, tries, showpass; 1040 int error; 1041 struct keybuf *keybuf; 1042 1043 g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name); 1044 g_topology_assert(); 1045 1046 if (root_mounted() || g_eli_tries == 0) 1047 return (NULL); 1048 1049 G_ELI_DEBUG(3, "Tasting %s.", pp->name); 1050 1051 error = g_eli_read_metadata(mp, pp, &md); 1052 if (error != 0) 1053 return (NULL); 1054 gp = NULL; 1055 1056 if (strcmp(md.md_magic, G_ELI_MAGIC) != 0) 1057 return (NULL); 1058 if (md.md_version > G_ELI_VERSION) { 1059 printf("geom_eli.ko module is too old to handle %s.\n", 1060 pp->name); 1061 return (NULL); 1062 } 1063 if (md.md_provsize != pp->mediasize) 1064 return (NULL); 1065 /* Should we attach it on boot? */ 1066 if (!(md.md_flags & G_ELI_FLAG_BOOT)) 1067 return (NULL); 1068 if (md.md_keys == 0x00) { 1069 G_ELI_DEBUG(0, "No valid keys on %s.", pp->name); 1070 return (NULL); 1071 } 1072 if (md.md_iterations == -1) { 1073 /* If there is no passphrase, we try only once. */ 1074 tries = 1; 1075 } else { 1076 /* Ask for the passphrase no more than g_eli_tries times. */ 1077 tries = g_eli_tries; 1078 } 1079 1080 if ((keybuf = get_keybuf()) != NULL) { 1081 /* Scan the key buffer, try all GELI keys. */ 1082 for (i = 0; i < keybuf->kb_nents; i++) { 1083 if (keybuf->kb_ents[i].ke_type == KEYBUF_TYPE_GELI) { 1084 memcpy(key, keybuf->kb_ents[i].ke_data, 1085 sizeof(key)); 1086 1087 if (g_eli_mkey_decrypt(&md, key, 1088 mkey, &nkey) == 0 ) { 1089 explicit_bzero(key, sizeof(key)); 1090 goto have_key; 1091 } 1092 } 1093 } 1094 } 1095 1096 for (i = 0; i <= tries; i++) { 1097 g_eli_crypto_hmac_init(&ctx, NULL, 0); 1098 1099 /* 1100 * Load all key files. 1101 */ 1102 nkeyfiles = g_eli_keyfiles_load(&ctx, pp->name); 1103 1104 if (nkeyfiles == 0 && md.md_iterations == -1) { 1105 /* 1106 * No key files and no passphrase, something is 1107 * definitely wrong here. 1108 * geli(8) doesn't allow for such situation, so assume 1109 * that there was really no passphrase and in that case 1110 * key files are no properly defined in loader.conf. 1111 */ 1112 G_ELI_DEBUG(0, 1113 "Found no key files in loader.conf for %s.", 1114 pp->name); 1115 return (NULL); 1116 } 1117 1118 /* Ask for the passphrase if defined. */ 1119 if (md.md_iterations >= 0) { 1120 /* Try first with cached passphrase. */ 1121 if (i == 0) { 1122 if (!g_eli_boot_passcache) 1123 continue; 1124 memcpy(passphrase, cached_passphrase, 1125 sizeof(passphrase)); 1126 } else { 1127 printf("Enter passphrase for %s: ", pp->name); 1128 showpass = g_eli_visible_passphrase; 1129 if ((md.md_flags & G_ELI_FLAG_GELIDISPLAYPASS) != 0) 1130 showpass = GETS_ECHOPASS; 1131 cngets(passphrase, sizeof(passphrase), 1132 showpass); 1133 memcpy(cached_passphrase, passphrase, 1134 sizeof(passphrase)); 1135 } 1136 } 1137 1138 /* 1139 * Prepare Derived-Key from the user passphrase. 1140 */ 1141 if (md.md_iterations == 0) { 1142 g_eli_crypto_hmac_update(&ctx, md.md_salt, 1143 sizeof(md.md_salt)); 1144 g_eli_crypto_hmac_update(&ctx, passphrase, 1145 strlen(passphrase)); 1146 explicit_bzero(passphrase, sizeof(passphrase)); 1147 } else if (md.md_iterations > 0) { 1148 u_char dkey[G_ELI_USERKEYLEN]; 1149 1150 pkcs5v2_genkey(dkey, sizeof(dkey), md.md_salt, 1151 sizeof(md.md_salt), passphrase, md.md_iterations); 1152 bzero(passphrase, sizeof(passphrase)); 1153 g_eli_crypto_hmac_update(&ctx, dkey, sizeof(dkey)); 1154 explicit_bzero(dkey, sizeof(dkey)); 1155 } 1156 1157 g_eli_crypto_hmac_final(&ctx, key, 0); 1158 1159 /* 1160 * Decrypt Master-Key. 1161 */ 1162 error = g_eli_mkey_decrypt(&md, key, mkey, &nkey); 1163 bzero(key, sizeof(key)); 1164 if (error == -1) { 1165 if (i == tries) { 1166 G_ELI_DEBUG(0, 1167 "Wrong key for %s. No tries left.", 1168 pp->name); 1169 g_eli_keyfiles_clear(pp->name); 1170 return (NULL); 1171 } 1172 if (i > 0) { 1173 G_ELI_DEBUG(0, 1174 "Wrong key for %s. Tries left: %u.", 1175 pp->name, tries - i); 1176 } 1177 /* Try again. */ 1178 continue; 1179 } else if (error > 0) { 1180 G_ELI_DEBUG(0, 1181 "Cannot decrypt Master Key for %s (error=%d).", 1182 pp->name, error); 1183 g_eli_keyfiles_clear(pp->name); 1184 return (NULL); 1185 } 1186 g_eli_keyfiles_clear(pp->name); 1187 G_ELI_DEBUG(1, "Using Master Key %u for %s.", nkey, pp->name); 1188 break; 1189 } 1190 have_key: 1191 1192 /* 1193 * We have correct key, let's attach provider. 1194 */ 1195 gp = g_eli_create(NULL, mp, pp, &md, mkey, nkey); 1196 bzero(mkey, sizeof(mkey)); 1197 bzero(&md, sizeof(md)); 1198 if (gp == NULL) { 1199 G_ELI_DEBUG(0, "Cannot create device %s%s.", pp->name, 1200 G_ELI_SUFFIX); 1201 return (NULL); 1202 } 1203 return (gp); 1204 } 1205 1206 static void 1207 g_eli_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, 1208 struct g_consumer *cp, struct g_provider *pp) 1209 { 1210 struct g_eli_softc *sc; 1211 1212 g_topology_assert(); 1213 sc = gp->softc; 1214 if (sc == NULL) 1215 return; 1216 if (pp != NULL || cp != NULL) 1217 return; /* Nothing here. */ 1218 1219 sbuf_printf(sb, "%s<KeysTotal>%ju</KeysTotal>\n", indent, 1220 (uintmax_t)sc->sc_ekeys_total); 1221 sbuf_printf(sb, "%s<KeysAllocated>%ju</KeysAllocated>\n", indent, 1222 (uintmax_t)sc->sc_ekeys_allocated); 1223 sbuf_printf(sb, "%s<Flags>", indent); 1224 if (sc->sc_flags == 0) 1225 sbuf_printf(sb, "NONE"); 1226 else { 1227 int first = 1; 1228 1229 #define ADD_FLAG(flag, name) do { \ 1230 if (sc->sc_flags & (flag)) { \ 1231 if (!first) \ 1232 sbuf_printf(sb, ", "); \ 1233 else \ 1234 first = 0; \ 1235 sbuf_printf(sb, name); \ 1236 } \ 1237 } while (0) 1238 ADD_FLAG(G_ELI_FLAG_SUSPEND, "SUSPEND"); 1239 ADD_FLAG(G_ELI_FLAG_SINGLE_KEY, "SINGLE-KEY"); 1240 ADD_FLAG(G_ELI_FLAG_NATIVE_BYTE_ORDER, "NATIVE-BYTE-ORDER"); 1241 ADD_FLAG(G_ELI_FLAG_ONETIME, "ONETIME"); 1242 ADD_FLAG(G_ELI_FLAG_BOOT, "BOOT"); 1243 ADD_FLAG(G_ELI_FLAG_WO_DETACH, "W-DETACH"); 1244 ADD_FLAG(G_ELI_FLAG_RW_DETACH, "RW-DETACH"); 1245 ADD_FLAG(G_ELI_FLAG_AUTH, "AUTH"); 1246 ADD_FLAG(G_ELI_FLAG_WOPEN, "W-OPEN"); 1247 ADD_FLAG(G_ELI_FLAG_DESTROY, "DESTROY"); 1248 ADD_FLAG(G_ELI_FLAG_RO, "READ-ONLY"); 1249 ADD_FLAG(G_ELI_FLAG_NODELETE, "NODELETE"); 1250 ADD_FLAG(G_ELI_FLAG_GELIBOOT, "GELIBOOT"); 1251 ADD_FLAG(G_ELI_FLAG_GELIDISPLAYPASS, "GELIDISPLAYPASS"); 1252 #undef ADD_FLAG 1253 } 1254 sbuf_printf(sb, "</Flags>\n"); 1255 1256 if (!(sc->sc_flags & G_ELI_FLAG_ONETIME)) { 1257 sbuf_printf(sb, "%s<UsedKey>%u</UsedKey>\n", indent, 1258 sc->sc_nkey); 1259 } 1260 sbuf_printf(sb, "%s<Version>%u</Version>\n", indent, sc->sc_version); 1261 sbuf_printf(sb, "%s<Crypto>", indent); 1262 switch (sc->sc_crypto) { 1263 case G_ELI_CRYPTO_HW: 1264 sbuf_printf(sb, "hardware"); 1265 break; 1266 case G_ELI_CRYPTO_SW: 1267 sbuf_printf(sb, "software"); 1268 break; 1269 default: 1270 sbuf_printf(sb, "UNKNOWN"); 1271 break; 1272 } 1273 sbuf_printf(sb, "</Crypto>\n"); 1274 if (sc->sc_flags & G_ELI_FLAG_AUTH) { 1275 sbuf_printf(sb, 1276 "%s<AuthenticationAlgorithm>%s</AuthenticationAlgorithm>\n", 1277 indent, g_eli_algo2str(sc->sc_aalgo)); 1278 } 1279 sbuf_printf(sb, "%s<KeyLength>%u</KeyLength>\n", indent, 1280 sc->sc_ekeylen); 1281 sbuf_printf(sb, "%s<EncryptionAlgorithm>%s</EncryptionAlgorithm>\n", 1282 indent, g_eli_algo2str(sc->sc_ealgo)); 1283 sbuf_printf(sb, "%s<State>%s</State>\n", indent, 1284 (sc->sc_flags & G_ELI_FLAG_SUSPEND) ? "SUSPENDED" : "ACTIVE"); 1285 } 1286 1287 static void 1288 g_eli_shutdown_pre_sync(void *arg, int howto) 1289 { 1290 struct g_class *mp; 1291 struct g_geom *gp, *gp2; 1292 struct g_provider *pp; 1293 struct g_eli_softc *sc; 1294 int error; 1295 1296 mp = arg; 1297 g_topology_lock(); 1298 LIST_FOREACH_SAFE(gp, &mp->geom, geom, gp2) { 1299 sc = gp->softc; 1300 if (sc == NULL) 1301 continue; 1302 pp = LIST_FIRST(&gp->provider); 1303 KASSERT(pp != NULL, ("No provider? gp=%p (%s)", gp, gp->name)); 1304 if (pp->acr + pp->acw + pp->ace == 0) 1305 error = g_eli_destroy(sc, TRUE); 1306 else { 1307 sc->sc_flags |= G_ELI_FLAG_RW_DETACH; 1308 gp->access = g_eli_access; 1309 } 1310 } 1311 g_topology_unlock(); 1312 } 1313 1314 static void 1315 g_eli_init(struct g_class *mp) 1316 { 1317 1318 g_eli_pre_sync = EVENTHANDLER_REGISTER(shutdown_pre_sync, 1319 g_eli_shutdown_pre_sync, mp, SHUTDOWN_PRI_FIRST); 1320 if (g_eli_pre_sync == NULL) 1321 G_ELI_DEBUG(0, "Warning! Cannot register shutdown event."); 1322 } 1323 1324 static void 1325 g_eli_fini(struct g_class *mp) 1326 { 1327 1328 if (g_eli_pre_sync != NULL) 1329 EVENTHANDLER_DEREGISTER(shutdown_pre_sync, g_eli_pre_sync); 1330 } 1331 1332 DECLARE_GEOM_CLASS(g_eli_class, g_eli); 1333 MODULE_DEPEND(g_eli, crypto, 1, 1, 1); 1334 MODULE_VERSION(geom_eli, 0);
Cache object: 02d61370b47c084ff6efc1c92f9212c0
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