1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2005-2011 Pawel Jakub Dawidek <pawel@dawidek.net> 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/cons.h> 35 #include <sys/kernel.h> 36 #include <sys/linker.h> 37 #include <sys/module.h> 38 #include <sys/lock.h> 39 #include <sys/mutex.h> 40 #include <sys/bio.h> 41 #include <sys/sbuf.h> 42 #include <sys/sysctl.h> 43 #include <sys/malloc.h> 44 #include <sys/eventhandler.h> 45 #include <sys/kthread.h> 46 #include <sys/proc.h> 47 #include <sys/sched.h> 48 #include <sys/smp.h> 49 #include <sys/uio.h> 50 #include <sys/vnode.h> 51 52 #include <vm/uma.h> 53 54 #include <geom/geom.h> 55 #include <geom/eli/g_eli.h> 56 #include <geom/eli/pkcs5v2.h> 57 58 #include <crypto/intake.h> 59 60 FEATURE(geom_eli, "GEOM crypto module"); 61 62 MALLOC_DEFINE(M_ELI, "eli data", "GEOM_ELI Data"); 63 64 SYSCTL_DECL(_kern_geom); 65 SYSCTL_NODE(_kern_geom, OID_AUTO, eli, CTLFLAG_RW, 0, "GEOM_ELI stuff"); 66 static int g_eli_version = G_ELI_VERSION; 67 SYSCTL_INT(_kern_geom_eli, OID_AUTO, version, CTLFLAG_RD, &g_eli_version, 0, 68 "GELI version"); 69 int g_eli_debug = 0; 70 SYSCTL_INT(_kern_geom_eli, OID_AUTO, debug, CTLFLAG_RWTUN, &g_eli_debug, 0, 71 "Debug level"); 72 static u_int g_eli_tries = 3; 73 SYSCTL_UINT(_kern_geom_eli, OID_AUTO, tries, CTLFLAG_RWTUN, &g_eli_tries, 0, 74 "Number of tries for entering the passphrase"); 75 static u_int g_eli_visible_passphrase = GETS_NOECHO; 76 SYSCTL_UINT(_kern_geom_eli, OID_AUTO, visible_passphrase, CTLFLAG_RWTUN, 77 &g_eli_visible_passphrase, 0, 78 "Visibility of passphrase prompt (0 = invisible, 1 = visible, 2 = asterisk)"); 79 u_int g_eli_overwrites = G_ELI_OVERWRITES; 80 SYSCTL_UINT(_kern_geom_eli, OID_AUTO, overwrites, CTLFLAG_RWTUN, &g_eli_overwrites, 81 0, "Number of times on-disk keys should be overwritten when destroying them"); 82 static u_int g_eli_threads = 0; 83 SYSCTL_UINT(_kern_geom_eli, OID_AUTO, threads, CTLFLAG_RWTUN, &g_eli_threads, 0, 84 "Number of threads doing crypto work"); 85 u_int g_eli_batch = 0; 86 SYSCTL_UINT(_kern_geom_eli, OID_AUTO, batch, CTLFLAG_RWTUN, &g_eli_batch, 0, 87 "Use crypto operations batching"); 88 89 /* 90 * Passphrase cached during boot, in order to be more user-friendly if 91 * there are multiple providers using the same passphrase. 92 */ 93 static char cached_passphrase[256]; 94 static u_int g_eli_boot_passcache = 1; 95 TUNABLE_INT("kern.geom.eli.boot_passcache", &g_eli_boot_passcache); 96 SYSCTL_UINT(_kern_geom_eli, OID_AUTO, boot_passcache, CTLFLAG_RD, 97 &g_eli_boot_passcache, 0, 98 "Passphrases are cached during boot process for possible reuse"); 99 static void 100 fetch_loader_passphrase(void * dummy) 101 { 102 char * env_passphrase; 103 104 KASSERT(dynamic_kenv, ("need dynamic kenv")); 105 106 if ((env_passphrase = kern_getenv("kern.geom.eli.passphrase")) != NULL) { 107 /* Extract passphrase from the environment. */ 108 strlcpy(cached_passphrase, env_passphrase, 109 sizeof(cached_passphrase)); 110 freeenv(env_passphrase); 111 112 /* Wipe the passphrase from the environment. */ 113 kern_unsetenv("kern.geom.eli.passphrase"); 114 } 115 } 116 SYSINIT(geli_fetch_loader_passphrase, SI_SUB_KMEM + 1, SI_ORDER_ANY, 117 fetch_loader_passphrase, NULL); 118 119 static void 120 zero_boot_passcache(void) 121 { 122 123 explicit_bzero(cached_passphrase, sizeof(cached_passphrase)); 124 } 125 126 static void 127 zero_geli_intake_keys(void) 128 { 129 struct keybuf *keybuf; 130 int i; 131 132 if ((keybuf = get_keybuf()) != NULL) { 133 /* Scan the key buffer, clear all GELI keys. */ 134 for (i = 0; i < keybuf->kb_nents; i++) { 135 if (keybuf->kb_ents[i].ke_type == KEYBUF_TYPE_GELI) { 136 explicit_bzero(keybuf->kb_ents[i].ke_data, 137 sizeof(keybuf->kb_ents[i].ke_data)); 138 keybuf->kb_ents[i].ke_type = KEYBUF_TYPE_NONE; 139 } 140 } 141 } 142 } 143 144 static void 145 zero_intake_passcache(void *dummy) 146 { 147 zero_boot_passcache(); 148 zero_geli_intake_keys(); 149 } 150 EVENTHANDLER_DEFINE(mountroot, zero_intake_passcache, NULL, 0); 151 152 static eventhandler_tag g_eli_pre_sync = NULL; 153 154 static int g_eli_destroy_geom(struct gctl_req *req, struct g_class *mp, 155 struct g_geom *gp); 156 static void g_eli_init(struct g_class *mp); 157 static void g_eli_fini(struct g_class *mp); 158 159 static g_taste_t g_eli_taste; 160 static g_dumpconf_t g_eli_dumpconf; 161 162 struct g_class g_eli_class = { 163 .name = G_ELI_CLASS_NAME, 164 .version = G_VERSION, 165 .ctlreq = g_eli_config, 166 .taste = g_eli_taste, 167 .destroy_geom = g_eli_destroy_geom, 168 .init = g_eli_init, 169 .fini = g_eli_fini 170 }; 171 172 173 /* 174 * Code paths: 175 * BIO_READ: 176 * 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 177 * BIO_WRITE: 178 * g_eli_start -> g_eli_crypto_run -> g_eli_crypto_write_done -> g_io_request -> g_eli_write_done -> g_io_deliver 179 */ 180 181 182 /* 183 * EAGAIN from crypto(9) means, that we were probably balanced to another crypto 184 * accelerator or something like this. 185 * The function updates the SID and rerun the operation. 186 */ 187 int 188 g_eli_crypto_rerun(struct cryptop *crp) 189 { 190 struct g_eli_softc *sc; 191 struct g_eli_worker *wr; 192 struct bio *bp; 193 int error; 194 195 bp = (struct bio *)crp->crp_opaque; 196 sc = bp->bio_to->geom->softc; 197 LIST_FOREACH(wr, &sc->sc_workers, w_next) { 198 if (wr->w_number == bp->bio_pflags) 199 break; 200 } 201 KASSERT(wr != NULL, ("Invalid worker (%u).", bp->bio_pflags)); 202 G_ELI_DEBUG(1, "Rerunning crypto %s request (sid: %p -> %p).", 203 bp->bio_cmd == BIO_READ ? "READ" : "WRITE", wr->w_sid, 204 crp->crp_session); 205 wr->w_sid = crp->crp_session; 206 crp->crp_etype = 0; 207 error = crypto_dispatch(crp); 208 if (error == 0) 209 return (0); 210 G_ELI_DEBUG(1, "%s: crypto_dispatch() returned %d.", __func__, error); 211 crp->crp_etype = error; 212 return (error); 213 } 214 215 static void 216 g_eli_getattr_done(struct bio *bp) 217 { 218 if (bp->bio_error == 0 && 219 !strcmp(bp->bio_attribute, "GEOM::physpath")) { 220 strlcat(bp->bio_data, "/eli", bp->bio_length); 221 } 222 g_std_done(bp); 223 } 224 225 /* 226 * The function is called afer reading encrypted data from the provider. 227 * 228 * 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 229 */ 230 void 231 g_eli_read_done(struct bio *bp) 232 { 233 struct g_eli_softc *sc; 234 struct bio *pbp; 235 236 G_ELI_LOGREQ(2, bp, "Request done."); 237 pbp = bp->bio_parent; 238 if (pbp->bio_error == 0 && bp->bio_error != 0) 239 pbp->bio_error = bp->bio_error; 240 g_destroy_bio(bp); 241 /* 242 * Do we have all sectors already? 243 */ 244 pbp->bio_inbed++; 245 if (pbp->bio_inbed < pbp->bio_children) 246 return; 247 sc = pbp->bio_to->geom->softc; 248 if (pbp->bio_error != 0) { 249 G_ELI_LOGREQ(0, pbp, "%s() failed (error=%d)", __func__, 250 pbp->bio_error); 251 pbp->bio_completed = 0; 252 if (pbp->bio_driver2 != NULL) { 253 free(pbp->bio_driver2, M_ELI); 254 pbp->bio_driver2 = NULL; 255 } 256 g_io_deliver(pbp, pbp->bio_error); 257 if (sc != NULL) 258 atomic_subtract_int(&sc->sc_inflight, 1); 259 return; 260 } 261 mtx_lock(&sc->sc_queue_mtx); 262 bioq_insert_tail(&sc->sc_queue, pbp); 263 mtx_unlock(&sc->sc_queue_mtx); 264 wakeup(sc); 265 } 266 267 /* 268 * The function is called after we encrypt and write data. 269 * 270 * g_eli_start -> g_eli_crypto_run -> g_eli_crypto_write_done -> g_io_request -> G_ELI_WRITE_DONE -> g_io_deliver 271 */ 272 void 273 g_eli_write_done(struct bio *bp) 274 { 275 struct g_eli_softc *sc; 276 struct bio *pbp; 277 278 G_ELI_LOGREQ(2, bp, "Request done."); 279 pbp = bp->bio_parent; 280 if (pbp->bio_error == 0 && bp->bio_error != 0) 281 pbp->bio_error = bp->bio_error; 282 g_destroy_bio(bp); 283 /* 284 * Do we have all sectors already? 285 */ 286 pbp->bio_inbed++; 287 if (pbp->bio_inbed < pbp->bio_children) 288 return; 289 free(pbp->bio_driver2, M_ELI); 290 pbp->bio_driver2 = NULL; 291 if (pbp->bio_error != 0) { 292 G_ELI_LOGREQ(0, pbp, "%s() failed (error=%d)", __func__, 293 pbp->bio_error); 294 pbp->bio_completed = 0; 295 } else 296 pbp->bio_completed = pbp->bio_length; 297 298 /* 299 * Write is finished, send it up. 300 */ 301 sc = pbp->bio_to->geom->softc; 302 g_io_deliver(pbp, pbp->bio_error); 303 if (sc != NULL) 304 atomic_subtract_int(&sc->sc_inflight, 1); 305 } 306 307 /* 308 * This function should never be called, but GEOM made as it set ->orphan() 309 * method for every geom. 310 */ 311 static void 312 g_eli_orphan_spoil_assert(struct g_consumer *cp) 313 { 314 315 panic("Function %s() called for %s.", __func__, cp->geom->name); 316 } 317 318 static void 319 g_eli_orphan(struct g_consumer *cp) 320 { 321 struct g_eli_softc *sc; 322 323 g_topology_assert(); 324 sc = cp->geom->softc; 325 if (sc == NULL) 326 return; 327 g_eli_destroy(sc, TRUE); 328 } 329 330 /* 331 * BIO_READ: 332 * 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 333 * BIO_WRITE: 334 * G_ELI_START -> g_eli_crypto_run -> g_eli_crypto_write_done -> g_io_request -> g_eli_write_done -> g_io_deliver 335 */ 336 static void 337 g_eli_start(struct bio *bp) 338 { 339 struct g_eli_softc *sc; 340 struct g_consumer *cp; 341 struct bio *cbp; 342 343 sc = bp->bio_to->geom->softc; 344 KASSERT(sc != NULL, 345 ("Provider's error should be set (error=%d)(device=%s).", 346 bp->bio_to->error, bp->bio_to->name)); 347 G_ELI_LOGREQ(2, bp, "Request received."); 348 349 switch (bp->bio_cmd) { 350 case BIO_READ: 351 case BIO_WRITE: 352 case BIO_GETATTR: 353 case BIO_FLUSH: 354 case BIO_ZONE: 355 break; 356 case BIO_DELETE: 357 /* 358 * If the user hasn't set the NODELETE flag, we just pass 359 * it down the stack and let the layers beneath us do (or 360 * not) whatever they do with it. If they have, we 361 * reject it. A possible extension would be an 362 * additional flag to take it as a hint to shred the data 363 * with [multiple?] overwrites. 364 */ 365 if (!(sc->sc_flags & G_ELI_FLAG_NODELETE)) 366 break; 367 default: 368 g_io_deliver(bp, EOPNOTSUPP); 369 return; 370 } 371 cbp = g_clone_bio(bp); 372 if (cbp == NULL) { 373 g_io_deliver(bp, ENOMEM); 374 return; 375 } 376 bp->bio_driver1 = cbp; 377 bp->bio_pflags = G_ELI_NEW_BIO; 378 switch (bp->bio_cmd) { 379 case BIO_READ: 380 if (!(sc->sc_flags & G_ELI_FLAG_AUTH)) { 381 g_eli_crypto_read(sc, bp, 0); 382 break; 383 } 384 /* FALLTHROUGH */ 385 case BIO_WRITE: 386 mtx_lock(&sc->sc_queue_mtx); 387 bioq_insert_tail(&sc->sc_queue, bp); 388 mtx_unlock(&sc->sc_queue_mtx); 389 wakeup(sc); 390 break; 391 case BIO_GETATTR: 392 case BIO_FLUSH: 393 case BIO_DELETE: 394 case BIO_ZONE: 395 if (bp->bio_cmd == BIO_GETATTR) 396 cbp->bio_done = g_eli_getattr_done; 397 else 398 cbp->bio_done = g_std_done; 399 cp = LIST_FIRST(&sc->sc_geom->consumer); 400 cbp->bio_to = cp->provider; 401 G_ELI_LOGREQ(2, cbp, "Sending request."); 402 g_io_request(cbp, cp); 403 break; 404 } 405 } 406 407 static int 408 g_eli_newsession(struct g_eli_worker *wr) 409 { 410 struct g_eli_softc *sc; 411 struct cryptoini crie, cria; 412 int error; 413 414 sc = wr->w_softc; 415 416 bzero(&crie, sizeof(crie)); 417 crie.cri_alg = sc->sc_ealgo; 418 crie.cri_klen = sc->sc_ekeylen; 419 if (sc->sc_ealgo == CRYPTO_AES_XTS) 420 crie.cri_klen <<= 1; 421 if ((sc->sc_flags & G_ELI_FLAG_FIRST_KEY) != 0) { 422 crie.cri_key = g_eli_key_hold(sc, 0, 423 LIST_FIRST(&sc->sc_geom->consumer)->provider->sectorsize); 424 } else { 425 crie.cri_key = sc->sc_ekey; 426 } 427 if (sc->sc_flags & G_ELI_FLAG_AUTH) { 428 bzero(&cria, sizeof(cria)); 429 cria.cri_alg = sc->sc_aalgo; 430 cria.cri_klen = sc->sc_akeylen; 431 cria.cri_key = sc->sc_akey; 432 crie.cri_next = &cria; 433 } 434 435 switch (sc->sc_crypto) { 436 case G_ELI_CRYPTO_SW: 437 error = crypto_newsession(&wr->w_sid, &crie, 438 CRYPTOCAP_F_SOFTWARE); 439 break; 440 case G_ELI_CRYPTO_HW: 441 error = crypto_newsession(&wr->w_sid, &crie, 442 CRYPTOCAP_F_HARDWARE); 443 break; 444 case G_ELI_CRYPTO_UNKNOWN: 445 error = crypto_newsession(&wr->w_sid, &crie, 446 CRYPTOCAP_F_HARDWARE); 447 if (error == 0) { 448 mtx_lock(&sc->sc_queue_mtx); 449 if (sc->sc_crypto == G_ELI_CRYPTO_UNKNOWN) 450 sc->sc_crypto = G_ELI_CRYPTO_HW; 451 mtx_unlock(&sc->sc_queue_mtx); 452 } else { 453 error = crypto_newsession(&wr->w_sid, &crie, 454 CRYPTOCAP_F_SOFTWARE); 455 mtx_lock(&sc->sc_queue_mtx); 456 if (sc->sc_crypto == G_ELI_CRYPTO_UNKNOWN) 457 sc->sc_crypto = G_ELI_CRYPTO_SW; 458 mtx_unlock(&sc->sc_queue_mtx); 459 } 460 break; 461 default: 462 panic("%s: invalid condition", __func__); 463 } 464 465 if ((sc->sc_flags & G_ELI_FLAG_FIRST_KEY) != 0) 466 g_eli_key_drop(sc, crie.cri_key); 467 468 return (error); 469 } 470 471 static void 472 g_eli_freesession(struct g_eli_worker *wr) 473 { 474 475 crypto_freesession(wr->w_sid); 476 } 477 478 static void 479 g_eli_cancel(struct g_eli_softc *sc) 480 { 481 struct bio *bp; 482 483 mtx_assert(&sc->sc_queue_mtx, MA_OWNED); 484 485 while ((bp = bioq_takefirst(&sc->sc_queue)) != NULL) { 486 KASSERT(bp->bio_pflags == G_ELI_NEW_BIO, 487 ("Not new bio when canceling (bp=%p).", bp)); 488 g_io_deliver(bp, ENXIO); 489 } 490 } 491 492 static struct bio * 493 g_eli_takefirst(struct g_eli_softc *sc) 494 { 495 struct bio *bp; 496 497 mtx_assert(&sc->sc_queue_mtx, MA_OWNED); 498 499 if (!(sc->sc_flags & G_ELI_FLAG_SUSPEND)) 500 return (bioq_takefirst(&sc->sc_queue)); 501 /* 502 * Device suspended, so we skip new I/O requests. 503 */ 504 TAILQ_FOREACH(bp, &sc->sc_queue.queue, bio_queue) { 505 if (bp->bio_pflags != G_ELI_NEW_BIO) 506 break; 507 } 508 if (bp != NULL) 509 bioq_remove(&sc->sc_queue, bp); 510 return (bp); 511 } 512 513 /* 514 * This is the main function for kernel worker thread when we don't have 515 * hardware acceleration and we have to do cryptography in software. 516 * Dedicated thread is needed, so we don't slow down g_up/g_down GEOM 517 * threads with crypto work. 518 */ 519 static void 520 g_eli_worker(void *arg) 521 { 522 struct g_eli_softc *sc; 523 struct g_eli_worker *wr; 524 struct bio *bp; 525 int error; 526 527 wr = arg; 528 sc = wr->w_softc; 529 #ifdef EARLY_AP_STARTUP 530 MPASS(!sc->sc_cpubind || smp_started); 531 #elif defined(SMP) 532 /* Before sched_bind() to a CPU, wait for all CPUs to go on-line. */ 533 if (sc->sc_cpubind) { 534 while (!smp_started) 535 tsleep(wr, 0, "geli:smp", hz / 4); 536 } 537 #endif 538 thread_lock(curthread); 539 sched_prio(curthread, PUSER); 540 if (sc->sc_cpubind) 541 sched_bind(curthread, wr->w_number % mp_ncpus); 542 thread_unlock(curthread); 543 544 G_ELI_DEBUG(1, "Thread %s started.", curthread->td_proc->p_comm); 545 546 for (;;) { 547 mtx_lock(&sc->sc_queue_mtx); 548 again: 549 bp = g_eli_takefirst(sc); 550 if (bp == NULL) { 551 if (sc->sc_flags & G_ELI_FLAG_DESTROY) { 552 g_eli_cancel(sc); 553 LIST_REMOVE(wr, w_next); 554 g_eli_freesession(wr); 555 free(wr, M_ELI); 556 G_ELI_DEBUG(1, "Thread %s exiting.", 557 curthread->td_proc->p_comm); 558 wakeup(&sc->sc_workers); 559 mtx_unlock(&sc->sc_queue_mtx); 560 kproc_exit(0); 561 } 562 while (sc->sc_flags & G_ELI_FLAG_SUSPEND) { 563 if (sc->sc_inflight > 0) { 564 G_ELI_DEBUG(0, "inflight=%d", 565 sc->sc_inflight); 566 /* 567 * We still have inflight BIOs, so 568 * sleep and retry. 569 */ 570 msleep(sc, &sc->sc_queue_mtx, PRIBIO, 571 "geli:inf", hz / 5); 572 goto again; 573 } 574 /* 575 * Suspend requested, mark the worker as 576 * suspended and go to sleep. 577 */ 578 if (wr->w_active) { 579 g_eli_freesession(wr); 580 wr->w_active = FALSE; 581 } 582 wakeup(&sc->sc_workers); 583 msleep(sc, &sc->sc_queue_mtx, PRIBIO, 584 "geli:suspend", 0); 585 if (!wr->w_active && 586 !(sc->sc_flags & G_ELI_FLAG_SUSPEND)) { 587 error = g_eli_newsession(wr); 588 KASSERT(error == 0, 589 ("g_eli_newsession() failed on resume (error=%d)", 590 error)); 591 wr->w_active = TRUE; 592 } 593 goto again; 594 } 595 msleep(sc, &sc->sc_queue_mtx, PDROP, "geli:w", 0); 596 continue; 597 } 598 if (bp->bio_pflags == G_ELI_NEW_BIO) 599 atomic_add_int(&sc->sc_inflight, 1); 600 mtx_unlock(&sc->sc_queue_mtx); 601 if (bp->bio_pflags == G_ELI_NEW_BIO) { 602 bp->bio_pflags = 0; 603 if (sc->sc_flags & G_ELI_FLAG_AUTH) { 604 if (bp->bio_cmd == BIO_READ) 605 g_eli_auth_read(sc, bp); 606 else 607 g_eli_auth_run(wr, bp); 608 } else { 609 if (bp->bio_cmd == BIO_READ) 610 g_eli_crypto_read(sc, bp, 1); 611 else 612 g_eli_crypto_run(wr, bp); 613 } 614 } else { 615 if (sc->sc_flags & G_ELI_FLAG_AUTH) 616 g_eli_auth_run(wr, bp); 617 else 618 g_eli_crypto_run(wr, bp); 619 } 620 } 621 } 622 623 int 624 g_eli_read_metadata(struct g_class *mp, struct g_provider *pp, 625 struct g_eli_metadata *md) 626 { 627 struct g_geom *gp; 628 struct g_consumer *cp; 629 u_char *buf = NULL; 630 int error; 631 632 g_topology_assert(); 633 634 gp = g_new_geomf(mp, "eli:taste"); 635 gp->start = g_eli_start; 636 gp->access = g_std_access; 637 /* 638 * g_eli_read_metadata() is always called from the event thread. 639 * Our geom is created and destroyed in the same event, so there 640 * could be no orphan nor spoil event in the meantime. 641 */ 642 gp->orphan = g_eli_orphan_spoil_assert; 643 gp->spoiled = g_eli_orphan_spoil_assert; 644 cp = g_new_consumer(gp); 645 error = g_attach(cp, pp); 646 if (error != 0) 647 goto end; 648 error = g_access(cp, 1, 0, 0); 649 if (error != 0) 650 goto end; 651 g_topology_unlock(); 652 buf = g_read_data(cp, pp->mediasize - pp->sectorsize, pp->sectorsize, 653 &error); 654 g_topology_lock(); 655 if (buf == NULL) 656 goto end; 657 error = eli_metadata_decode(buf, md); 658 if (error != 0) 659 goto end; 660 /* Metadata was read and decoded successfully. */ 661 end: 662 if (buf != NULL) 663 g_free(buf); 664 if (cp->provider != NULL) { 665 if (cp->acr == 1) 666 g_access(cp, -1, 0, 0); 667 g_detach(cp); 668 } 669 g_destroy_consumer(cp); 670 g_destroy_geom(gp); 671 return (error); 672 } 673 674 /* 675 * The function is called when we had last close on provider and user requested 676 * to close it when this situation occur. 677 */ 678 static void 679 g_eli_last_close(void *arg, int flags __unused) 680 { 681 struct g_geom *gp; 682 char gpname[64]; 683 int error; 684 685 g_topology_assert(); 686 gp = arg; 687 strlcpy(gpname, gp->name, sizeof(gpname)); 688 error = g_eli_destroy(gp->softc, TRUE); 689 KASSERT(error == 0, ("Cannot detach %s on last close (error=%d).", 690 gpname, error)); 691 G_ELI_DEBUG(0, "Detached %s on last close.", gpname); 692 } 693 694 int 695 g_eli_access(struct g_provider *pp, int dr, int dw, int de) 696 { 697 struct g_eli_softc *sc; 698 struct g_geom *gp; 699 700 gp = pp->geom; 701 sc = gp->softc; 702 703 if (dw > 0) { 704 if (sc->sc_flags & G_ELI_FLAG_RO) { 705 /* Deny write attempts. */ 706 return (EROFS); 707 } 708 /* Someone is opening us for write, we need to remember that. */ 709 sc->sc_flags |= G_ELI_FLAG_WOPEN; 710 return (0); 711 } 712 /* Is this the last close? */ 713 if (pp->acr + dr > 0 || pp->acw + dw > 0 || pp->ace + de > 0) 714 return (0); 715 716 /* 717 * Automatically detach on last close if requested. 718 */ 719 if ((sc->sc_flags & G_ELI_FLAG_RW_DETACH) || 720 (sc->sc_flags & G_ELI_FLAG_WOPEN)) { 721 g_post_event(g_eli_last_close, gp, M_WAITOK, NULL); 722 } 723 return (0); 724 } 725 726 static int 727 g_eli_cpu_is_disabled(int cpu) 728 { 729 #ifdef SMP 730 return (CPU_ISSET(cpu, &hlt_cpus_mask)); 731 #else 732 return (0); 733 #endif 734 } 735 736 struct g_geom * 737 g_eli_create(struct gctl_req *req, struct g_class *mp, struct g_provider *bpp, 738 const struct g_eli_metadata *md, const u_char *mkey, int nkey) 739 { 740 struct g_eli_softc *sc; 741 struct g_eli_worker *wr; 742 struct g_geom *gp; 743 struct g_provider *pp; 744 struct g_consumer *cp; 745 u_int i, threads; 746 int error; 747 748 G_ELI_DEBUG(1, "Creating device %s%s.", bpp->name, G_ELI_SUFFIX); 749 750 gp = g_new_geomf(mp, "%s%s", bpp->name, G_ELI_SUFFIX); 751 sc = malloc(sizeof(*sc), M_ELI, M_WAITOK | M_ZERO); 752 gp->start = g_eli_start; 753 /* 754 * Spoiling can happen even though we have the provider open 755 * exclusively, e.g. through media change events. 756 */ 757 gp->spoiled = g_eli_orphan; 758 gp->orphan = g_eli_orphan; 759 gp->dumpconf = g_eli_dumpconf; 760 /* 761 * If detach-on-last-close feature is not enabled and we don't operate 762 * on read-only provider, we can simply use g_std_access(). 763 */ 764 if (md->md_flags & (G_ELI_FLAG_WO_DETACH | G_ELI_FLAG_RO)) 765 gp->access = g_eli_access; 766 else 767 gp->access = g_std_access; 768 769 eli_metadata_softc(sc, md, bpp->sectorsize, bpp->mediasize); 770 sc->sc_nkey = nkey; 771 772 gp->softc = sc; 773 sc->sc_geom = gp; 774 775 bioq_init(&sc->sc_queue); 776 mtx_init(&sc->sc_queue_mtx, "geli:queue", NULL, MTX_DEF); 777 mtx_init(&sc->sc_ekeys_lock, "geli:ekeys", NULL, MTX_DEF); 778 779 pp = NULL; 780 cp = g_new_consumer(gp); 781 error = g_attach(cp, bpp); 782 if (error != 0) { 783 if (req != NULL) { 784 gctl_error(req, "Cannot attach to %s (error=%d).", 785 bpp->name, error); 786 } else { 787 G_ELI_DEBUG(1, "Cannot attach to %s (error=%d).", 788 bpp->name, error); 789 } 790 goto failed; 791 } 792 /* 793 * Keep provider open all the time, so we can run critical tasks, 794 * like Master Keys deletion, without wondering if we can open 795 * provider or not. 796 * We don't open provider for writing only when user requested read-only 797 * access. 798 */ 799 if (sc->sc_flags & G_ELI_FLAG_RO) 800 error = g_access(cp, 1, 0, 1); 801 else 802 error = g_access(cp, 1, 1, 1); 803 if (error != 0) { 804 if (req != NULL) { 805 gctl_error(req, "Cannot access %s (error=%d).", 806 bpp->name, error); 807 } else { 808 G_ELI_DEBUG(1, "Cannot access %s (error=%d).", 809 bpp->name, error); 810 } 811 goto failed; 812 } 813 814 /* 815 * Remember the keys in our softc structure. 816 */ 817 g_eli_mkey_propagate(sc, mkey); 818 819 LIST_INIT(&sc->sc_workers); 820 821 threads = g_eli_threads; 822 if (threads == 0) 823 threads = mp_ncpus; 824 sc->sc_cpubind = (mp_ncpus > 1 && threads == mp_ncpus); 825 for (i = 0; i < threads; i++) { 826 if (g_eli_cpu_is_disabled(i)) { 827 G_ELI_DEBUG(1, "%s: CPU %u disabled, skipping.", 828 bpp->name, i); 829 continue; 830 } 831 wr = malloc(sizeof(*wr), M_ELI, M_WAITOK | M_ZERO); 832 wr->w_softc = sc; 833 wr->w_number = i; 834 wr->w_active = TRUE; 835 836 error = g_eli_newsession(wr); 837 if (error != 0) { 838 free(wr, M_ELI); 839 if (req != NULL) { 840 gctl_error(req, "Cannot set up crypto session " 841 "for %s (error=%d).", bpp->name, error); 842 } else { 843 G_ELI_DEBUG(1, "Cannot set up crypto session " 844 "for %s (error=%d).", bpp->name, error); 845 } 846 goto failed; 847 } 848 849 error = kproc_create(g_eli_worker, wr, &wr->w_proc, 0, 0, 850 "g_eli[%u] %s", i, bpp->name); 851 if (error != 0) { 852 g_eli_freesession(wr); 853 free(wr, M_ELI); 854 if (req != NULL) { 855 gctl_error(req, "Cannot create kernel thread " 856 "for %s (error=%d).", bpp->name, error); 857 } else { 858 G_ELI_DEBUG(1, "Cannot create kernel thread " 859 "for %s (error=%d).", bpp->name, error); 860 } 861 goto failed; 862 } 863 LIST_INSERT_HEAD(&sc->sc_workers, wr, w_next); 864 } 865 866 /* 867 * Create decrypted provider. 868 */ 869 pp = g_new_providerf(gp, "%s%s", bpp->name, G_ELI_SUFFIX); 870 pp->mediasize = sc->sc_mediasize; 871 pp->sectorsize = sc->sc_sectorsize; 872 873 g_error_provider(pp, 0); 874 875 G_ELI_DEBUG(0, "Device %s created.", pp->name); 876 G_ELI_DEBUG(0, "Encryption: %s %u", g_eli_algo2str(sc->sc_ealgo), 877 sc->sc_ekeylen); 878 if (sc->sc_flags & G_ELI_FLAG_AUTH) 879 G_ELI_DEBUG(0, " Integrity: %s", g_eli_algo2str(sc->sc_aalgo)); 880 G_ELI_DEBUG(0, " Crypto: %s", 881 sc->sc_crypto == G_ELI_CRYPTO_SW ? "software" : "hardware"); 882 return (gp); 883 failed: 884 mtx_lock(&sc->sc_queue_mtx); 885 sc->sc_flags |= G_ELI_FLAG_DESTROY; 886 wakeup(sc); 887 /* 888 * Wait for kernel threads self destruction. 889 */ 890 while (!LIST_EMPTY(&sc->sc_workers)) { 891 msleep(&sc->sc_workers, &sc->sc_queue_mtx, PRIBIO, 892 "geli:destroy", 0); 893 } 894 mtx_destroy(&sc->sc_queue_mtx); 895 if (cp->provider != NULL) { 896 if (cp->acr == 1) 897 g_access(cp, -1, -1, -1); 898 g_detach(cp); 899 } 900 g_destroy_consumer(cp); 901 g_destroy_geom(gp); 902 g_eli_key_destroy(sc); 903 bzero(sc, sizeof(*sc)); 904 free(sc, M_ELI); 905 return (NULL); 906 } 907 908 int 909 g_eli_destroy(struct g_eli_softc *sc, boolean_t force) 910 { 911 struct g_geom *gp; 912 struct g_provider *pp; 913 914 g_topology_assert(); 915 916 if (sc == NULL) 917 return (ENXIO); 918 919 gp = sc->sc_geom; 920 pp = LIST_FIRST(&gp->provider); 921 if (pp != NULL && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) { 922 if (force) { 923 G_ELI_DEBUG(1, "Device %s is still open, so it " 924 "cannot be definitely removed.", pp->name); 925 sc->sc_flags |= G_ELI_FLAG_RW_DETACH; 926 gp->access = g_eli_access; 927 g_wither_provider(pp, ENXIO); 928 return (EBUSY); 929 } else { 930 G_ELI_DEBUG(1, 931 "Device %s is still open (r%dw%de%d).", pp->name, 932 pp->acr, pp->acw, pp->ace); 933 return (EBUSY); 934 } 935 } 936 937 mtx_lock(&sc->sc_queue_mtx); 938 sc->sc_flags |= G_ELI_FLAG_DESTROY; 939 wakeup(sc); 940 while (!LIST_EMPTY(&sc->sc_workers)) { 941 msleep(&sc->sc_workers, &sc->sc_queue_mtx, PRIBIO, 942 "geli:destroy", 0); 943 } 944 mtx_destroy(&sc->sc_queue_mtx); 945 gp->softc = NULL; 946 g_eli_key_destroy(sc); 947 bzero(sc, sizeof(*sc)); 948 free(sc, M_ELI); 949 950 if (pp == NULL || (pp->acr == 0 && pp->acw == 0 && pp->ace == 0)) 951 G_ELI_DEBUG(0, "Device %s destroyed.", gp->name); 952 g_wither_geom_close(gp, ENXIO); 953 954 return (0); 955 } 956 957 static int 958 g_eli_destroy_geom(struct gctl_req *req __unused, 959 struct g_class *mp __unused, struct g_geom *gp) 960 { 961 struct g_eli_softc *sc; 962 963 sc = gp->softc; 964 return (g_eli_destroy(sc, FALSE)); 965 } 966 967 static int 968 g_eli_keyfiles_load(struct hmac_ctx *ctx, const char *provider) 969 { 970 u_char *keyfile, *data; 971 char *file, name[64]; 972 size_t size; 973 int i; 974 975 for (i = 0; ; i++) { 976 snprintf(name, sizeof(name), "%s:geli_keyfile%d", provider, i); 977 keyfile = preload_search_by_type(name); 978 if (keyfile == NULL && i == 0) { 979 /* 980 * If there is only one keyfile, allow simpler name. 981 */ 982 snprintf(name, sizeof(name), "%s:geli_keyfile", provider); 983 keyfile = preload_search_by_type(name); 984 } 985 if (keyfile == NULL) 986 return (i); /* Return number of loaded keyfiles. */ 987 data = preload_fetch_addr(keyfile); 988 if (data == NULL) { 989 G_ELI_DEBUG(0, "Cannot find key file data for %s.", 990 name); 991 return (0); 992 } 993 size = preload_fetch_size(keyfile); 994 if (size == 0) { 995 G_ELI_DEBUG(0, "Cannot find key file size for %s.", 996 name); 997 return (0); 998 } 999 file = preload_search_info(keyfile, MODINFO_NAME); 1000 if (file == NULL) { 1001 G_ELI_DEBUG(0, "Cannot find key file name for %s.", 1002 name); 1003 return (0); 1004 } 1005 G_ELI_DEBUG(1, "Loaded keyfile %s for %s (type: %s).", file, 1006 provider, name); 1007 g_eli_crypto_hmac_update(ctx, data, size); 1008 } 1009 } 1010 1011 static void 1012 g_eli_keyfiles_clear(const char *provider) 1013 { 1014 u_char *keyfile, *data; 1015 char name[64]; 1016 size_t size; 1017 int i; 1018 1019 for (i = 0; ; i++) { 1020 snprintf(name, sizeof(name), "%s:geli_keyfile%d", provider, i); 1021 keyfile = preload_search_by_type(name); 1022 if (keyfile == NULL) 1023 return; 1024 data = preload_fetch_addr(keyfile); 1025 size = preload_fetch_size(keyfile); 1026 if (data != NULL && size != 0) 1027 bzero(data, size); 1028 } 1029 } 1030 1031 /* 1032 * Tasting is only made on boot. 1033 * We detect providers which should be attached before root is mounted. 1034 */ 1035 static struct g_geom * 1036 g_eli_taste(struct g_class *mp, struct g_provider *pp, int flags __unused) 1037 { 1038 struct g_eli_metadata md; 1039 struct g_geom *gp; 1040 struct hmac_ctx ctx; 1041 char passphrase[256]; 1042 u_char key[G_ELI_USERKEYLEN], mkey[G_ELI_DATAIVKEYLEN]; 1043 u_int i, nkey, nkeyfiles, tries, showpass; 1044 int error; 1045 struct keybuf *keybuf; 1046 1047 g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name); 1048 g_topology_assert(); 1049 1050 if (root_mounted() || g_eli_tries == 0) 1051 return (NULL); 1052 1053 G_ELI_DEBUG(3, "Tasting %s.", pp->name); 1054 1055 error = g_eli_read_metadata(mp, pp, &md); 1056 if (error != 0) 1057 return (NULL); 1058 gp = NULL; 1059 1060 if (strcmp(md.md_magic, G_ELI_MAGIC) != 0) 1061 return (NULL); 1062 if (md.md_version > G_ELI_VERSION) { 1063 printf("geom_eli.ko module is too old to handle %s.\n", 1064 pp->name); 1065 return (NULL); 1066 } 1067 if (md.md_provsize != pp->mediasize) 1068 return (NULL); 1069 /* Should we attach it on boot? */ 1070 if (!(md.md_flags & G_ELI_FLAG_BOOT)) 1071 return (NULL); 1072 if (md.md_keys == 0x00) { 1073 G_ELI_DEBUG(0, "No valid keys on %s.", pp->name); 1074 return (NULL); 1075 } 1076 if (md.md_iterations == -1) { 1077 /* If there is no passphrase, we try only once. */ 1078 tries = 1; 1079 } else { 1080 /* Ask for the passphrase no more than g_eli_tries times. */ 1081 tries = g_eli_tries; 1082 } 1083 1084 if ((keybuf = get_keybuf()) != NULL) { 1085 /* Scan the key buffer, try all GELI keys. */ 1086 for (i = 0; i < keybuf->kb_nents; i++) { 1087 if (keybuf->kb_ents[i].ke_type == KEYBUF_TYPE_GELI) { 1088 memcpy(key, keybuf->kb_ents[i].ke_data, 1089 sizeof(key)); 1090 1091 if (g_eli_mkey_decrypt_any(&md, key, 1092 mkey, &nkey) == 0 ) { 1093 explicit_bzero(key, sizeof(key)); 1094 goto have_key; 1095 } 1096 } 1097 } 1098 } 1099 1100 for (i = 0; i <= tries; i++) { 1101 g_eli_crypto_hmac_init(&ctx, NULL, 0); 1102 1103 /* 1104 * Load all key files. 1105 */ 1106 nkeyfiles = g_eli_keyfiles_load(&ctx, pp->name); 1107 1108 if (nkeyfiles == 0 && md.md_iterations == -1) { 1109 /* 1110 * No key files and no passphrase, something is 1111 * definitely wrong here. 1112 * geli(8) doesn't allow for such situation, so assume 1113 * that there was really no passphrase and in that case 1114 * key files are no properly defined in loader.conf. 1115 */ 1116 G_ELI_DEBUG(0, 1117 "Found no key files in loader.conf for %s.", 1118 pp->name); 1119 return (NULL); 1120 } 1121 1122 /* Ask for the passphrase if defined. */ 1123 if (md.md_iterations >= 0) { 1124 /* Try first with cached passphrase. */ 1125 if (i == 0) { 1126 if (!g_eli_boot_passcache) 1127 continue; 1128 memcpy(passphrase, cached_passphrase, 1129 sizeof(passphrase)); 1130 } else { 1131 printf("Enter passphrase for %s: ", pp->name); 1132 showpass = g_eli_visible_passphrase; 1133 if ((md.md_flags & G_ELI_FLAG_GELIDISPLAYPASS) != 0) 1134 showpass = GETS_ECHOPASS; 1135 cngets(passphrase, sizeof(passphrase), 1136 showpass); 1137 memcpy(cached_passphrase, passphrase, 1138 sizeof(passphrase)); 1139 } 1140 } 1141 1142 /* 1143 * Prepare Derived-Key from the user passphrase. 1144 */ 1145 if (md.md_iterations == 0) { 1146 g_eli_crypto_hmac_update(&ctx, md.md_salt, 1147 sizeof(md.md_salt)); 1148 g_eli_crypto_hmac_update(&ctx, passphrase, 1149 strlen(passphrase)); 1150 explicit_bzero(passphrase, sizeof(passphrase)); 1151 } else if (md.md_iterations > 0) { 1152 u_char dkey[G_ELI_USERKEYLEN]; 1153 1154 pkcs5v2_genkey(dkey, sizeof(dkey), md.md_salt, 1155 sizeof(md.md_salt), passphrase, md.md_iterations); 1156 bzero(passphrase, sizeof(passphrase)); 1157 g_eli_crypto_hmac_update(&ctx, dkey, sizeof(dkey)); 1158 explicit_bzero(dkey, sizeof(dkey)); 1159 } 1160 1161 g_eli_crypto_hmac_final(&ctx, key, 0); 1162 1163 /* 1164 * Decrypt Master-Key. 1165 */ 1166 error = g_eli_mkey_decrypt_any(&md, key, mkey, &nkey); 1167 bzero(key, sizeof(key)); 1168 if (error == -1) { 1169 if (i == tries) { 1170 G_ELI_DEBUG(0, 1171 "Wrong key for %s. No tries left.", 1172 pp->name); 1173 g_eli_keyfiles_clear(pp->name); 1174 return (NULL); 1175 } 1176 if (i > 0) { 1177 G_ELI_DEBUG(0, 1178 "Wrong key for %s. Tries left: %u.", 1179 pp->name, tries - i); 1180 } 1181 /* Try again. */ 1182 continue; 1183 } else if (error > 0) { 1184 G_ELI_DEBUG(0, 1185 "Cannot decrypt Master Key for %s (error=%d).", 1186 pp->name, error); 1187 g_eli_keyfiles_clear(pp->name); 1188 return (NULL); 1189 } 1190 g_eli_keyfiles_clear(pp->name); 1191 G_ELI_DEBUG(1, "Using Master Key %u for %s.", nkey, pp->name); 1192 break; 1193 } 1194 have_key: 1195 1196 /* 1197 * We have correct key, let's attach provider. 1198 */ 1199 gp = g_eli_create(NULL, mp, pp, &md, mkey, nkey); 1200 bzero(mkey, sizeof(mkey)); 1201 bzero(&md, sizeof(md)); 1202 if (gp == NULL) { 1203 G_ELI_DEBUG(0, "Cannot create device %s%s.", pp->name, 1204 G_ELI_SUFFIX); 1205 return (NULL); 1206 } 1207 return (gp); 1208 } 1209 1210 static void 1211 g_eli_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, 1212 struct g_consumer *cp, struct g_provider *pp) 1213 { 1214 struct g_eli_softc *sc; 1215 1216 g_topology_assert(); 1217 sc = gp->softc; 1218 if (sc == NULL) 1219 return; 1220 if (pp != NULL || cp != NULL) 1221 return; /* Nothing here. */ 1222 1223 sbuf_printf(sb, "%s<KeysTotal>%ju</KeysTotal>\n", indent, 1224 (uintmax_t)sc->sc_ekeys_total); 1225 sbuf_printf(sb, "%s<KeysAllocated>%ju</KeysAllocated>\n", indent, 1226 (uintmax_t)sc->sc_ekeys_allocated); 1227 sbuf_printf(sb, "%s<Flags>", indent); 1228 if (sc->sc_flags == 0) 1229 sbuf_printf(sb, "NONE"); 1230 else { 1231 int first = 1; 1232 1233 #define ADD_FLAG(flag, name) do { \ 1234 if (sc->sc_flags & (flag)) { \ 1235 if (!first) \ 1236 sbuf_printf(sb, ", "); \ 1237 else \ 1238 first = 0; \ 1239 sbuf_printf(sb, name); \ 1240 } \ 1241 } while (0) 1242 ADD_FLAG(G_ELI_FLAG_SUSPEND, "SUSPEND"); 1243 ADD_FLAG(G_ELI_FLAG_SINGLE_KEY, "SINGLE-KEY"); 1244 ADD_FLAG(G_ELI_FLAG_NATIVE_BYTE_ORDER, "NATIVE-BYTE-ORDER"); 1245 ADD_FLAG(G_ELI_FLAG_ONETIME, "ONETIME"); 1246 ADD_FLAG(G_ELI_FLAG_BOOT, "BOOT"); 1247 ADD_FLAG(G_ELI_FLAG_WO_DETACH, "W-DETACH"); 1248 ADD_FLAG(G_ELI_FLAG_RW_DETACH, "RW-DETACH"); 1249 ADD_FLAG(G_ELI_FLAG_AUTH, "AUTH"); 1250 ADD_FLAG(G_ELI_FLAG_WOPEN, "W-OPEN"); 1251 ADD_FLAG(G_ELI_FLAG_DESTROY, "DESTROY"); 1252 ADD_FLAG(G_ELI_FLAG_RO, "READ-ONLY"); 1253 ADD_FLAG(G_ELI_FLAG_NODELETE, "NODELETE"); 1254 ADD_FLAG(G_ELI_FLAG_GELIBOOT, "GELIBOOT"); 1255 ADD_FLAG(G_ELI_FLAG_GELIDISPLAYPASS, "GELIDISPLAYPASS"); 1256 #undef ADD_FLAG 1257 } 1258 sbuf_printf(sb, "</Flags>\n"); 1259 1260 if (!(sc->sc_flags & G_ELI_FLAG_ONETIME)) { 1261 sbuf_printf(sb, "%s<UsedKey>%u</UsedKey>\n", indent, 1262 sc->sc_nkey); 1263 } 1264 sbuf_printf(sb, "%s<Version>%u</Version>\n", indent, sc->sc_version); 1265 sbuf_printf(sb, "%s<Crypto>", indent); 1266 switch (sc->sc_crypto) { 1267 case G_ELI_CRYPTO_HW: 1268 sbuf_printf(sb, "hardware"); 1269 break; 1270 case G_ELI_CRYPTO_SW: 1271 sbuf_printf(sb, "software"); 1272 break; 1273 default: 1274 sbuf_printf(sb, "UNKNOWN"); 1275 break; 1276 } 1277 sbuf_printf(sb, "</Crypto>\n"); 1278 if (sc->sc_flags & G_ELI_FLAG_AUTH) { 1279 sbuf_printf(sb, 1280 "%s<AuthenticationAlgorithm>%s</AuthenticationAlgorithm>\n", 1281 indent, g_eli_algo2str(sc->sc_aalgo)); 1282 } 1283 sbuf_printf(sb, "%s<KeyLength>%u</KeyLength>\n", indent, 1284 sc->sc_ekeylen); 1285 sbuf_printf(sb, "%s<EncryptionAlgorithm>%s</EncryptionAlgorithm>\n", 1286 indent, g_eli_algo2str(sc->sc_ealgo)); 1287 sbuf_printf(sb, "%s<State>%s</State>\n", indent, 1288 (sc->sc_flags & G_ELI_FLAG_SUSPEND) ? "SUSPENDED" : "ACTIVE"); 1289 } 1290 1291 static void 1292 g_eli_shutdown_pre_sync(void *arg, int howto) 1293 { 1294 struct g_class *mp; 1295 struct g_geom *gp, *gp2; 1296 struct g_provider *pp; 1297 struct g_eli_softc *sc; 1298 int error; 1299 1300 mp = arg; 1301 g_topology_lock(); 1302 LIST_FOREACH_SAFE(gp, &mp->geom, geom, gp2) { 1303 sc = gp->softc; 1304 if (sc == NULL) 1305 continue; 1306 pp = LIST_FIRST(&gp->provider); 1307 KASSERT(pp != NULL, ("No provider? gp=%p (%s)", gp, gp->name)); 1308 if (pp->acr + pp->acw + pp->ace == 0) 1309 error = g_eli_destroy(sc, TRUE); 1310 else { 1311 sc->sc_flags |= G_ELI_FLAG_RW_DETACH; 1312 gp->access = g_eli_access; 1313 } 1314 } 1315 g_topology_unlock(); 1316 } 1317 1318 static void 1319 g_eli_init(struct g_class *mp) 1320 { 1321 1322 g_eli_pre_sync = EVENTHANDLER_REGISTER(shutdown_pre_sync, 1323 g_eli_shutdown_pre_sync, mp, SHUTDOWN_PRI_FIRST); 1324 if (g_eli_pre_sync == NULL) 1325 G_ELI_DEBUG(0, "Warning! Cannot register shutdown event."); 1326 } 1327 1328 static void 1329 g_eli_fini(struct g_class *mp) 1330 { 1331 1332 if (g_eli_pre_sync != NULL) 1333 EVENTHANDLER_DEREGISTER(shutdown_pre_sync, g_eli_pre_sync); 1334 } 1335 1336 DECLARE_GEOM_CLASS(g_eli_class, g_eli); 1337 MODULE_DEPEND(g_eli, crypto, 1, 1, 1); 1338 MODULE_VERSION(geom_eli, 0); 1339