Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/geom/eli/g_eli.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
1 /*- 2 * Copyright (c) 2005-2010 Pawel Jakub Dawidek <pjd@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD: releng/8.3/sys/geom/eli/g_eli.c 221755 2011-05-11 04:48:03Z ae $"); 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/kernel.h> 33 #include <sys/linker.h> 34 #include <sys/module.h> 35 #include <sys/lock.h> 36 #include <sys/mutex.h> 37 #include <sys/bio.h> 38 #include <sys/sysctl.h> 39 #include <sys/malloc.h> 40 #include <sys/eventhandler.h> 41 #include <sys/kthread.h> 42 #include <sys/proc.h> 43 #include <sys/sched.h> 44 #include <sys/smp.h> 45 #include <sys/uio.h> 46 #include <sys/vnode.h> 47 48 #include <vm/uma.h> 49 50 #include <geom/geom.h> 51 #include <geom/eli/g_eli.h> 52 #include <geom/eli/pkcs5v2.h> 53 54 55 MALLOC_DEFINE(M_ELI, "eli data", "GEOM_ELI Data"); 56 57 SYSCTL_DECL(_kern_geom); 58 SYSCTL_NODE(_kern_geom, OID_AUTO, eli, CTLFLAG_RW, 0, "GEOM_ELI stuff"); 59 int g_eli_debug = 0; 60 TUNABLE_INT("kern.geom.eli.debug", &g_eli_debug); 61 SYSCTL_INT(_kern_geom_eli, OID_AUTO, debug, CTLFLAG_RW, &g_eli_debug, 0, 62 "Debug level"); 63 static u_int g_eli_tries = 3; 64 TUNABLE_INT("kern.geom.eli.tries", &g_eli_tries); 65 SYSCTL_UINT(_kern_geom_eli, OID_AUTO, tries, CTLFLAG_RW, &g_eli_tries, 0, 66 "Number of tries for entering the passphrase"); 67 static u_int g_eli_visible_passphrase = 0; 68 TUNABLE_INT("kern.geom.eli.visible_passphrase", &g_eli_visible_passphrase); 69 SYSCTL_UINT(_kern_geom_eli, OID_AUTO, visible_passphrase, CTLFLAG_RW, 70 &g_eli_visible_passphrase, 0, 71 "Turn on echo when entering the passphrase (for debug purposes only!!)"); 72 u_int g_eli_overwrites = G_ELI_OVERWRITES; 73 TUNABLE_INT("kern.geom.eli.overwrites", &g_eli_overwrites); 74 SYSCTL_UINT(_kern_geom_eli, OID_AUTO, overwrites, CTLFLAG_RW, &g_eli_overwrites, 75 0, "Number of times on-disk keys should be overwritten when destroying them"); 76 static u_int g_eli_threads = 0; 77 TUNABLE_INT("kern.geom.eli.threads", &g_eli_threads); 78 SYSCTL_UINT(_kern_geom_eli, OID_AUTO, threads, CTLFLAG_RW, &g_eli_threads, 0, 79 "Number of threads doing crypto work"); 80 u_int g_eli_batch = 0; 81 TUNABLE_INT("kern.geom.eli.batch", &g_eli_batch); 82 SYSCTL_UINT(_kern_geom_eli, OID_AUTO, batch, CTLFLAG_RW, &g_eli_batch, 0, 83 "Use crypto operations batching"); 84 85 static eventhandler_tag g_eli_pre_sync = NULL; 86 87 static int g_eli_destroy_geom(struct gctl_req *req, struct g_class *mp, 88 struct g_geom *gp); 89 static void g_eli_init(struct g_class *mp); 90 static void g_eli_fini(struct g_class *mp); 91 92 static g_taste_t g_eli_taste; 93 static g_dumpconf_t g_eli_dumpconf; 94 95 struct g_class g_eli_class = { 96 .name = G_ELI_CLASS_NAME, 97 .version = G_VERSION, 98 .ctlreq = g_eli_config, 99 .taste = g_eli_taste, 100 .destroy_geom = g_eli_destroy_geom, 101 .init = g_eli_init, 102 .fini = g_eli_fini 103 }; 104 105 106 /* 107 * Code paths: 108 * BIO_READ: 109 * 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 110 * BIO_WRITE: 111 * g_eli_start -> g_eli_crypto_run -> g_eli_crypto_write_done -> g_io_request -> g_eli_write_done -> g_io_deliver 112 */ 113 114 115 /* 116 * EAGAIN from crypto(9) means, that we were probably balanced to another crypto 117 * accelerator or something like this. 118 * The function updates the SID and rerun the operation. 119 */ 120 int 121 g_eli_crypto_rerun(struct cryptop *crp) 122 { 123 struct g_eli_softc *sc; 124 struct g_eli_worker *wr; 125 struct bio *bp; 126 int error; 127 128 bp = (struct bio *)crp->crp_opaque; 129 sc = bp->bio_to->geom->softc; 130 LIST_FOREACH(wr, &sc->sc_workers, w_next) { 131 if (wr->w_number == bp->bio_pflags) 132 break; 133 } 134 KASSERT(wr != NULL, ("Invalid worker (%u).", bp->bio_pflags)); 135 G_ELI_DEBUG(1, "Rerunning crypto %s request (sid: %ju -> %ju).", 136 bp->bio_cmd == BIO_READ ? "READ" : "WRITE", (uintmax_t)wr->w_sid, 137 (uintmax_t)crp->crp_sid); 138 wr->w_sid = crp->crp_sid; 139 crp->crp_etype = 0; 140 error = crypto_dispatch(crp); 141 if (error == 0) 142 return (0); 143 G_ELI_DEBUG(1, "%s: crypto_dispatch() returned %d.", __func__, error); 144 crp->crp_etype = error; 145 return (error); 146 } 147 148 /* 149 * The function is called afer reading encrypted data from the provider. 150 * 151 * 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 152 */ 153 void 154 g_eli_read_done(struct bio *bp) 155 { 156 struct g_eli_softc *sc; 157 struct bio *pbp; 158 159 G_ELI_LOGREQ(2, bp, "Request done."); 160 pbp = bp->bio_parent; 161 if (pbp->bio_error == 0) 162 pbp->bio_error = bp->bio_error; 163 g_destroy_bio(bp); 164 /* 165 * Do we have all sectors already? 166 */ 167 pbp->bio_inbed++; 168 if (pbp->bio_inbed < pbp->bio_children) 169 return; 170 sc = pbp->bio_to->geom->softc; 171 if (pbp->bio_error != 0) { 172 G_ELI_LOGREQ(0, pbp, "%s() failed", __func__); 173 pbp->bio_completed = 0; 174 if (pbp->bio_driver2 != NULL) { 175 free(pbp->bio_driver2, M_ELI); 176 pbp->bio_driver2 = NULL; 177 } 178 g_io_deliver(pbp, pbp->bio_error); 179 atomic_subtract_int(&sc->sc_inflight, 1); 180 return; 181 } 182 mtx_lock(&sc->sc_queue_mtx); 183 bioq_insert_tail(&sc->sc_queue, pbp); 184 mtx_unlock(&sc->sc_queue_mtx); 185 wakeup(sc); 186 } 187 188 /* 189 * The function is called after we encrypt and write data. 190 * 191 * g_eli_start -> g_eli_crypto_run -> g_eli_crypto_write_done -> g_io_request -> G_ELI_WRITE_DONE -> g_io_deliver 192 */ 193 void 194 g_eli_write_done(struct bio *bp) 195 { 196 struct g_eli_softc *sc; 197 struct bio *pbp; 198 199 G_ELI_LOGREQ(2, bp, "Request done."); 200 pbp = bp->bio_parent; 201 if (pbp->bio_error == 0) { 202 if (bp->bio_error != 0) 203 pbp->bio_error = bp->bio_error; 204 } 205 g_destroy_bio(bp); 206 /* 207 * Do we have all sectors already? 208 */ 209 pbp->bio_inbed++; 210 if (pbp->bio_inbed < pbp->bio_children) 211 return; 212 free(pbp->bio_driver2, M_ELI); 213 pbp->bio_driver2 = NULL; 214 if (pbp->bio_error != 0) { 215 G_ELI_LOGREQ(0, pbp, "Crypto WRITE request failed (error=%d).", 216 pbp->bio_error); 217 pbp->bio_completed = 0; 218 } 219 /* 220 * Write is finished, send it up. 221 */ 222 pbp->bio_completed = pbp->bio_length; 223 sc = pbp->bio_to->geom->softc; 224 g_io_deliver(pbp, pbp->bio_error); 225 atomic_subtract_int(&sc->sc_inflight, 1); 226 } 227 228 /* 229 * This function should never be called, but GEOM made as it set ->orphan() 230 * method for every geom. 231 */ 232 static void 233 g_eli_orphan_spoil_assert(struct g_consumer *cp) 234 { 235 236 panic("Function %s() called for %s.", __func__, cp->geom->name); 237 } 238 239 static void 240 g_eli_orphan(struct g_consumer *cp) 241 { 242 struct g_eli_softc *sc; 243 244 g_topology_assert(); 245 sc = cp->geom->softc; 246 if (sc == NULL) 247 return; 248 g_eli_destroy(sc, TRUE); 249 } 250 251 /* 252 * BIO_READ: 253 * 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 254 * BIO_WRITE: 255 * G_ELI_START -> g_eli_crypto_run -> g_eli_crypto_write_done -> g_io_request -> g_eli_write_done -> g_io_deliver 256 */ 257 static void 258 g_eli_start(struct bio *bp) 259 { 260 struct g_eli_softc *sc; 261 struct g_consumer *cp; 262 struct bio *cbp; 263 264 sc = bp->bio_to->geom->softc; 265 KASSERT(sc != NULL, 266 ("Provider's error should be set (error=%d)(device=%s).", 267 bp->bio_to->error, bp->bio_to->name)); 268 G_ELI_LOGREQ(2, bp, "Request received."); 269 270 switch (bp->bio_cmd) { 271 case BIO_READ: 272 case BIO_WRITE: 273 case BIO_GETATTR: 274 case BIO_FLUSH: 275 break; 276 case BIO_DELETE: 277 /* 278 * We could eventually support BIO_DELETE request. 279 * It could be done by overwritting requested sector with 280 * random data g_eli_overwrites number of times. 281 */ 282 default: 283 g_io_deliver(bp, EOPNOTSUPP); 284 return; 285 } 286 cbp = g_clone_bio(bp); 287 if (cbp == NULL) { 288 g_io_deliver(bp, ENOMEM); 289 return; 290 } 291 bp->bio_driver1 = cbp; 292 bp->bio_pflags = G_ELI_NEW_BIO; 293 switch (bp->bio_cmd) { 294 case BIO_READ: 295 if (!(sc->sc_flags & G_ELI_FLAG_AUTH)) { 296 g_eli_crypto_read(sc, bp, 0); 297 break; 298 } 299 /* FALLTHROUGH */ 300 case BIO_WRITE: 301 mtx_lock(&sc->sc_queue_mtx); 302 bioq_insert_tail(&sc->sc_queue, bp); 303 mtx_unlock(&sc->sc_queue_mtx); 304 wakeup(sc); 305 break; 306 case BIO_GETATTR: 307 case BIO_FLUSH: 308 cbp->bio_done = g_std_done; 309 cp = LIST_FIRST(&sc->sc_geom->consumer); 310 cbp->bio_to = cp->provider; 311 G_ELI_LOGREQ(2, cbp, "Sending request."); 312 g_io_request(cbp, cp); 313 break; 314 } 315 } 316 317 static int 318 g_eli_newsession(struct g_eli_worker *wr) 319 { 320 struct g_eli_softc *sc; 321 struct cryptoini crie, cria; 322 int error; 323 324 sc = wr->w_softc; 325 326 bzero(&crie, sizeof(crie)); 327 crie.cri_alg = sc->sc_ealgo; 328 crie.cri_klen = sc->sc_ekeylen; 329 if (sc->sc_ealgo == CRYPTO_AES_XTS) 330 crie.cri_klen <<= 1; 331 crie.cri_key = sc->sc_ekeys[0]; 332 if (sc->sc_flags & G_ELI_FLAG_AUTH) { 333 bzero(&cria, sizeof(cria)); 334 cria.cri_alg = sc->sc_aalgo; 335 cria.cri_klen = sc->sc_akeylen; 336 cria.cri_key = sc->sc_akey; 337 crie.cri_next = &cria; 338 } 339 340 switch (sc->sc_crypto) { 341 case G_ELI_CRYPTO_SW: 342 error = crypto_newsession(&wr->w_sid, &crie, 343 CRYPTOCAP_F_SOFTWARE); 344 break; 345 case G_ELI_CRYPTO_HW: 346 error = crypto_newsession(&wr->w_sid, &crie, 347 CRYPTOCAP_F_HARDWARE); 348 break; 349 case G_ELI_CRYPTO_UNKNOWN: 350 error = crypto_newsession(&wr->w_sid, &crie, 351 CRYPTOCAP_F_HARDWARE); 352 if (error == 0) { 353 mtx_lock(&sc->sc_queue_mtx); 354 if (sc->sc_crypto == G_ELI_CRYPTO_UNKNOWN) 355 sc->sc_crypto = G_ELI_CRYPTO_HW; 356 mtx_unlock(&sc->sc_queue_mtx); 357 } else { 358 error = crypto_newsession(&wr->w_sid, &crie, 359 CRYPTOCAP_F_SOFTWARE); 360 mtx_lock(&sc->sc_queue_mtx); 361 if (sc->sc_crypto == G_ELI_CRYPTO_UNKNOWN) 362 sc->sc_crypto = G_ELI_CRYPTO_SW; 363 mtx_unlock(&sc->sc_queue_mtx); 364 } 365 break; 366 default: 367 panic("%s: invalid condition", __func__); 368 } 369 370 return (error); 371 } 372 373 static void 374 g_eli_freesession(struct g_eli_worker *wr) 375 { 376 377 crypto_freesession(wr->w_sid); 378 } 379 380 static void 381 g_eli_cancel(struct g_eli_softc *sc) 382 { 383 struct bio *bp; 384 385 mtx_assert(&sc->sc_queue_mtx, MA_OWNED); 386 387 while ((bp = bioq_takefirst(&sc->sc_queue)) != NULL) { 388 KASSERT(bp->bio_pflags == G_ELI_NEW_BIO, 389 ("Not new bio when canceling (bp=%p).", bp)); 390 g_io_deliver(bp, ENXIO); 391 } 392 } 393 394 static struct bio * 395 g_eli_takefirst(struct g_eli_softc *sc) 396 { 397 struct bio *bp; 398 399 mtx_assert(&sc->sc_queue_mtx, MA_OWNED); 400 401 if (!(sc->sc_flags & G_ELI_FLAG_SUSPEND)) 402 return (bioq_takefirst(&sc->sc_queue)); 403 /* 404 * Device suspended, so we skip new I/O requests. 405 */ 406 TAILQ_FOREACH(bp, &sc->sc_queue.queue, bio_queue) { 407 if (bp->bio_pflags != G_ELI_NEW_BIO) 408 break; 409 } 410 if (bp != NULL) 411 bioq_remove(&sc->sc_queue, bp); 412 return (bp); 413 } 414 415 /* 416 * This is the main function for kernel worker thread when we don't have 417 * hardware acceleration and we have to do cryptography in software. 418 * Dedicated thread is needed, so we don't slow down g_up/g_down GEOM 419 * threads with crypto work. 420 */ 421 static void 422 g_eli_worker(void *arg) 423 { 424 struct g_eli_softc *sc; 425 struct g_eli_worker *wr; 426 struct bio *bp; 427 int error; 428 429 wr = arg; 430 sc = wr->w_softc; 431 #ifdef SMP 432 /* Before sched_bind() to a CPU, wait for all CPUs to go on-line. */ 433 if (mp_ncpus > 1 && sc->sc_crypto == G_ELI_CRYPTO_SW && 434 g_eli_threads == 0) { 435 while (!smp_started) 436 tsleep(wr, 0, "geli:smp", hz / 4); 437 } 438 #endif 439 thread_lock(curthread); 440 sched_prio(curthread, PUSER); 441 if (sc->sc_crypto == G_ELI_CRYPTO_SW && g_eli_threads == 0) 442 sched_bind(curthread, wr->w_number); 443 thread_unlock(curthread); 444 445 G_ELI_DEBUG(1, "Thread %s started.", curthread->td_proc->p_comm); 446 447 for (;;) { 448 mtx_lock(&sc->sc_queue_mtx); 449 again: 450 bp = g_eli_takefirst(sc); 451 if (bp == NULL) { 452 if (sc->sc_flags & G_ELI_FLAG_DESTROY) { 453 g_eli_cancel(sc); 454 LIST_REMOVE(wr, w_next); 455 g_eli_freesession(wr); 456 free(wr, M_ELI); 457 G_ELI_DEBUG(1, "Thread %s exiting.", 458 curthread->td_proc->p_comm); 459 wakeup(&sc->sc_workers); 460 mtx_unlock(&sc->sc_queue_mtx); 461 kproc_exit(0); 462 } 463 while (sc->sc_flags & G_ELI_FLAG_SUSPEND) { 464 if (sc->sc_inflight > 0) { 465 G_ELI_DEBUG(0, "inflight=%d", sc->sc_inflight); 466 /* 467 * We still have inflight BIOs, so 468 * sleep and retry. 469 */ 470 msleep(sc, &sc->sc_queue_mtx, PRIBIO, 471 "geli:inf", hz / 5); 472 goto again; 473 } 474 /* 475 * Suspend requested, mark the worker as 476 * suspended and go to sleep. 477 */ 478 if (wr->w_active) { 479 g_eli_freesession(wr); 480 wr->w_active = FALSE; 481 } 482 wakeup(&sc->sc_workers); 483 msleep(sc, &sc->sc_queue_mtx, PRIBIO, 484 "geli:suspend", 0); 485 if (!wr->w_active && 486 !(sc->sc_flags & G_ELI_FLAG_SUSPEND)) { 487 error = g_eli_newsession(wr); 488 KASSERT(error == 0, 489 ("g_eli_newsession() failed on resume (error=%d)", 490 error)); 491 wr->w_active = TRUE; 492 } 493 goto again; 494 } 495 msleep(sc, &sc->sc_queue_mtx, PDROP, "geli:w", 0); 496 continue; 497 } 498 if (bp->bio_pflags == G_ELI_NEW_BIO) 499 atomic_add_int(&sc->sc_inflight, 1); 500 mtx_unlock(&sc->sc_queue_mtx); 501 if (bp->bio_pflags == G_ELI_NEW_BIO) { 502 bp->bio_pflags = 0; 503 if (sc->sc_flags & G_ELI_FLAG_AUTH) { 504 if (bp->bio_cmd == BIO_READ) 505 g_eli_auth_read(sc, bp); 506 else 507 g_eli_auth_run(wr, bp); 508 } else { 509 if (bp->bio_cmd == BIO_READ) 510 g_eli_crypto_read(sc, bp, 1); 511 else 512 g_eli_crypto_run(wr, bp); 513 } 514 } else { 515 if (sc->sc_flags & G_ELI_FLAG_AUTH) 516 g_eli_auth_run(wr, bp); 517 else 518 g_eli_crypto_run(wr, bp); 519 } 520 } 521 } 522 523 /* 524 * Select encryption key. If G_ELI_FLAG_SINGLE_KEY is present we only have one 525 * key available for all the data. If the flag is not present select the key 526 * based on data offset. 527 */ 528 uint8_t * 529 g_eli_crypto_key(struct g_eli_softc *sc, off_t offset, size_t blocksize) 530 { 531 u_int nkey; 532 533 if (sc->sc_nekeys == 1) 534 return (sc->sc_ekeys[0]); 535 536 KASSERT(sc->sc_nekeys > 1, ("%s: sc_nekeys=%u", __func__, 537 sc->sc_nekeys)); 538 KASSERT((sc->sc_flags & G_ELI_FLAG_SINGLE_KEY) == 0, 539 ("%s: SINGLE_KEY flag set, but sc_nekeys=%u", __func__, 540 sc->sc_nekeys)); 541 542 /* We switch key every 2^G_ELI_KEY_SHIFT blocks. */ 543 nkey = (offset >> G_ELI_KEY_SHIFT) / blocksize; 544 545 KASSERT(nkey < sc->sc_nekeys, ("%s: nkey=%u >= sc_nekeys=%u", __func__, 546 nkey, sc->sc_nekeys)); 547 548 return (sc->sc_ekeys[nkey]); 549 } 550 551 /* 552 * Here we generate IV. It is unique for every sector. 553 */ 554 void 555 g_eli_crypto_ivgen(struct g_eli_softc *sc, off_t offset, u_char *iv, 556 size_t size) 557 { 558 uint8_t off[8]; 559 560 if ((sc->sc_flags & G_ELI_FLAG_NATIVE_BYTE_ORDER) != 0) 561 bcopy(&offset, off, sizeof(off)); 562 else 563 le64enc(off, (uint64_t)offset); 564 565 switch (sc->sc_ealgo) { 566 case CRYPTO_AES_XTS: 567 bcopy(off, iv, sizeof(off)); 568 bzero(iv + sizeof(off), size - sizeof(off)); 569 break; 570 default: 571 { 572 u_char hash[SHA256_DIGEST_LENGTH]; 573 SHA256_CTX ctx; 574 575 /* Copy precalculated SHA256 context for IV-Key. */ 576 bcopy(&sc->sc_ivctx, &ctx, sizeof(ctx)); 577 SHA256_Update(&ctx, off, sizeof(off)); 578 SHA256_Final(hash, &ctx); 579 bcopy(hash, iv, MIN(sizeof(hash), size)); 580 break; 581 } 582 } 583 } 584 585 int 586 g_eli_read_metadata(struct g_class *mp, struct g_provider *pp, 587 struct g_eli_metadata *md) 588 { 589 struct g_geom *gp; 590 struct g_consumer *cp; 591 u_char *buf = NULL; 592 int error; 593 594 g_topology_assert(); 595 596 gp = g_new_geomf(mp, "eli:taste"); 597 gp->start = g_eli_start; 598 gp->access = g_std_access; 599 /* 600 * g_eli_read_metadata() is always called from the event thread. 601 * Our geom is created and destroyed in the same event, so there 602 * could be no orphan nor spoil event in the meantime. 603 */ 604 gp->orphan = g_eli_orphan_spoil_assert; 605 gp->spoiled = g_eli_orphan_spoil_assert; 606 cp = g_new_consumer(gp); 607 error = g_attach(cp, pp); 608 if (error != 0) 609 goto end; 610 error = g_access(cp, 1, 0, 0); 611 if (error != 0) 612 goto end; 613 g_topology_unlock(); 614 buf = g_read_data(cp, pp->mediasize - pp->sectorsize, pp->sectorsize, 615 &error); 616 g_topology_lock(); 617 if (buf == NULL) 618 goto end; 619 eli_metadata_decode(buf, md); 620 end: 621 if (buf != NULL) 622 g_free(buf); 623 if (cp->provider != NULL) { 624 if (cp->acr == 1) 625 g_access(cp, -1, 0, 0); 626 g_detach(cp); 627 } 628 g_destroy_consumer(cp); 629 g_destroy_geom(gp); 630 return (error); 631 } 632 633 /* 634 * The function is called when we had last close on provider and user requested 635 * to close it when this situation occur. 636 */ 637 static void 638 g_eli_last_close(struct g_eli_softc *sc) 639 { 640 struct g_geom *gp; 641 struct g_provider *pp; 642 char ppname[64]; 643 int error; 644 645 g_topology_assert(); 646 gp = sc->sc_geom; 647 pp = LIST_FIRST(&gp->provider); 648 strlcpy(ppname, pp->name, sizeof(ppname)); 649 error = g_eli_destroy(sc, TRUE); 650 KASSERT(error == 0, ("Cannot detach %s on last close (error=%d).", 651 ppname, error)); 652 G_ELI_DEBUG(0, "Detached %s on last close.", ppname); 653 } 654 655 int 656 g_eli_access(struct g_provider *pp, int dr, int dw, int de) 657 { 658 struct g_eli_softc *sc; 659 struct g_geom *gp; 660 661 gp = pp->geom; 662 sc = gp->softc; 663 664 if (dw > 0) { 665 if (sc->sc_flags & G_ELI_FLAG_RO) { 666 /* Deny write attempts. */ 667 return (EROFS); 668 } 669 /* Someone is opening us for write, we need to remember that. */ 670 sc->sc_flags |= G_ELI_FLAG_WOPEN; 671 return (0); 672 } 673 /* Is this the last close? */ 674 if (pp->acr + dr > 0 || pp->acw + dw > 0 || pp->ace + de > 0) 675 return (0); 676 677 /* 678 * Automatically detach on last close if requested. 679 */ 680 if ((sc->sc_flags & G_ELI_FLAG_RW_DETACH) || 681 (sc->sc_flags & G_ELI_FLAG_WOPEN)) { 682 g_eli_last_close(sc); 683 } 684 return (0); 685 } 686 687 static int 688 g_eli_cpu_is_disabled(int cpu) 689 { 690 #ifdef SMP 691 return ((hlt_cpus_mask & (1 << cpu)) != 0); 692 #else 693 return (0); 694 #endif 695 } 696 697 struct g_geom * 698 g_eli_create(struct gctl_req *req, struct g_class *mp, struct g_provider *bpp, 699 const struct g_eli_metadata *md, const u_char *mkey, int nkey) 700 { 701 struct g_eli_softc *sc; 702 struct g_eli_worker *wr; 703 struct g_geom *gp; 704 struct g_provider *pp; 705 struct g_consumer *cp; 706 u_int i, threads; 707 int error; 708 709 G_ELI_DEBUG(1, "Creating device %s%s.", bpp->name, G_ELI_SUFFIX); 710 711 gp = g_new_geomf(mp, "%s%s", bpp->name, G_ELI_SUFFIX); 712 sc = malloc(sizeof(*sc), M_ELI, M_WAITOK | M_ZERO); 713 gp->start = g_eli_start; 714 /* 715 * Spoiling cannot happen actually, because we keep provider open for 716 * writing all the time or provider is read-only. 717 */ 718 gp->spoiled = g_eli_orphan_spoil_assert; 719 gp->orphan = g_eli_orphan; 720 gp->dumpconf = g_eli_dumpconf; 721 /* 722 * If detach-on-last-close feature is not enabled and we don't operate 723 * on read-only provider, we can simply use g_std_access(). 724 */ 725 if (md->md_flags & (G_ELI_FLAG_WO_DETACH | G_ELI_FLAG_RO)) 726 gp->access = g_eli_access; 727 else 728 gp->access = g_std_access; 729 730 sc->sc_inflight = 0; 731 sc->sc_crypto = G_ELI_CRYPTO_UNKNOWN; 732 sc->sc_flags = md->md_flags; 733 /* Backward compatibility. */ 734 if (md->md_version < 4) 735 sc->sc_flags |= G_ELI_FLAG_NATIVE_BYTE_ORDER; 736 if (md->md_version < 5) 737 sc->sc_flags |= G_ELI_FLAG_SINGLE_KEY; 738 sc->sc_ealgo = md->md_ealgo; 739 sc->sc_nkey = nkey; 740 741 if (sc->sc_flags & G_ELI_FLAG_AUTH) { 742 sc->sc_akeylen = sizeof(sc->sc_akey) * 8; 743 sc->sc_aalgo = md->md_aalgo; 744 sc->sc_alen = g_eli_hashlen(sc->sc_aalgo); 745 746 sc->sc_data_per_sector = bpp->sectorsize - sc->sc_alen; 747 /* 748 * Some hash functions (like SHA1 and RIPEMD160) generates hash 749 * which length is not multiple of 128 bits, but we want data 750 * length to be multiple of 128, so we can encrypt without 751 * padding. The line below rounds down data length to multiple 752 * of 128 bits. 753 */ 754 sc->sc_data_per_sector -= sc->sc_data_per_sector % 16; 755 756 sc->sc_bytes_per_sector = 757 (md->md_sectorsize - 1) / sc->sc_data_per_sector + 1; 758 sc->sc_bytes_per_sector *= bpp->sectorsize; 759 } 760 761 gp->softc = sc; 762 sc->sc_geom = gp; 763 764 bioq_init(&sc->sc_queue); 765 mtx_init(&sc->sc_queue_mtx, "geli:queue", NULL, MTX_DEF); 766 767 pp = NULL; 768 cp = g_new_consumer(gp); 769 error = g_attach(cp, bpp); 770 if (error != 0) { 771 if (req != NULL) { 772 gctl_error(req, "Cannot attach to %s (error=%d).", 773 bpp->name, error); 774 } else { 775 G_ELI_DEBUG(1, "Cannot attach to %s (error=%d).", 776 bpp->name, error); 777 } 778 goto failed; 779 } 780 /* 781 * Keep provider open all the time, so we can run critical tasks, 782 * like Master Keys deletion, without wondering if we can open 783 * provider or not. 784 * We don't open provider for writing only when user requested read-only 785 * access. 786 */ 787 if (sc->sc_flags & G_ELI_FLAG_RO) 788 error = g_access(cp, 1, 0, 1); 789 else 790 error = g_access(cp, 1, 1, 1); 791 if (error != 0) { 792 if (req != NULL) { 793 gctl_error(req, "Cannot access %s (error=%d).", 794 bpp->name, error); 795 } else { 796 G_ELI_DEBUG(1, "Cannot access %s (error=%d).", 797 bpp->name, error); 798 } 799 goto failed; 800 } 801 802 sc->sc_sectorsize = md->md_sectorsize; 803 sc->sc_mediasize = bpp->mediasize; 804 if (!(sc->sc_flags & G_ELI_FLAG_ONETIME)) 805 sc->sc_mediasize -= bpp->sectorsize; 806 if (!(sc->sc_flags & G_ELI_FLAG_AUTH)) 807 sc->sc_mediasize -= (sc->sc_mediasize % sc->sc_sectorsize); 808 else { 809 sc->sc_mediasize /= sc->sc_bytes_per_sector; 810 sc->sc_mediasize *= sc->sc_sectorsize; 811 } 812 813 /* 814 * Remember the keys in our softc structure. 815 */ 816 g_eli_mkey_propagate(sc, mkey); 817 sc->sc_ekeylen = md->md_keylen; 818 819 LIST_INIT(&sc->sc_workers); 820 821 threads = g_eli_threads; 822 if (threads == 0) 823 threads = mp_ncpus; 824 else if (threads > mp_ncpus) { 825 /* There is really no need for too many worker threads. */ 826 threads = mp_ncpus; 827 G_ELI_DEBUG(0, "Reducing number of threads to %u.", threads); 828 } 829 for (i = 0; i < threads; i++) { 830 if (g_eli_cpu_is_disabled(i)) { 831 G_ELI_DEBUG(1, "%s: CPU %u disabled, skipping.", 832 bpp->name, i); 833 continue; 834 } 835 wr = malloc(sizeof(*wr), M_ELI, M_WAITOK | M_ZERO); 836 wr->w_softc = sc; 837 wr->w_number = i; 838 wr->w_active = TRUE; 839 840 error = g_eli_newsession(wr); 841 if (error != 0) { 842 free(wr, M_ELI); 843 if (req != NULL) { 844 gctl_error(req, "Cannot set up crypto session " 845 "for %s (error=%d).", bpp->name, error); 846 } else { 847 G_ELI_DEBUG(1, "Cannot set up crypto session " 848 "for %s (error=%d).", bpp->name, error); 849 } 850 goto failed; 851 } 852 853 error = kproc_create(g_eli_worker, wr, &wr->w_proc, 0, 0, 854 "g_eli[%u] %s", i, bpp->name); 855 if (error != 0) { 856 g_eli_freesession(wr); 857 free(wr, M_ELI); 858 if (req != NULL) { 859 gctl_error(req, "Cannot create kernel thread " 860 "for %s (error=%d).", bpp->name, error); 861 } else { 862 G_ELI_DEBUG(1, "Cannot create kernel thread " 863 "for %s (error=%d).", bpp->name, error); 864 } 865 goto failed; 866 } 867 LIST_INSERT_HEAD(&sc->sc_workers, wr, w_next); 868 /* If we have hardware support, one thread is enough. */ 869 if (sc->sc_crypto == G_ELI_CRYPTO_HW) 870 break; 871 } 872 873 /* 874 * Create decrypted provider. 875 */ 876 pp = g_new_providerf(gp, "%s%s", bpp->name, G_ELI_SUFFIX); 877 pp->mediasize = sc->sc_mediasize; 878 pp->sectorsize = sc->sc_sectorsize; 879 880 g_error_provider(pp, 0); 881 882 G_ELI_DEBUG(0, "Device %s created.", pp->name); 883 G_ELI_DEBUG(0, "Encryption: %s %u", g_eli_algo2str(sc->sc_ealgo), 884 sc->sc_ekeylen); 885 if (sc->sc_flags & G_ELI_FLAG_AUTH) 886 G_ELI_DEBUG(0, " Integrity: %s", g_eli_algo2str(sc->sc_aalgo)); 887 G_ELI_DEBUG(0, " Crypto: %s", 888 sc->sc_crypto == G_ELI_CRYPTO_SW ? "software" : "hardware"); 889 return (gp); 890 failed: 891 mtx_lock(&sc->sc_queue_mtx); 892 sc->sc_flags |= G_ELI_FLAG_DESTROY; 893 wakeup(sc); 894 /* 895 * Wait for kernel threads self destruction. 896 */ 897 while (!LIST_EMPTY(&sc->sc_workers)) { 898 msleep(&sc->sc_workers, &sc->sc_queue_mtx, PRIBIO, 899 "geli:destroy", 0); 900 } 901 mtx_destroy(&sc->sc_queue_mtx); 902 if (cp->provider != NULL) { 903 if (cp->acr == 1) 904 g_access(cp, -1, -1, -1); 905 g_detach(cp); 906 } 907 g_destroy_consumer(cp); 908 g_destroy_geom(gp); 909 if (sc->sc_ekeys != NULL) { 910 bzero(sc->sc_ekeys, 911 sc->sc_nekeys * (sizeof(uint8_t *) + G_ELI_DATAKEYLEN)); 912 free(sc->sc_ekeys, M_ELI); 913 } 914 bzero(sc, sizeof(*sc)); 915 free(sc, M_ELI); 916 return (NULL); 917 } 918 919 int 920 g_eli_destroy(struct g_eli_softc *sc, boolean_t force) 921 { 922 struct g_geom *gp; 923 struct g_provider *pp; 924 925 g_topology_assert(); 926 927 if (sc == NULL) 928 return (ENXIO); 929 930 gp = sc->sc_geom; 931 pp = LIST_FIRST(&gp->provider); 932 if (pp != NULL && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) { 933 if (force) { 934 G_ELI_DEBUG(1, "Device %s is still open, so it " 935 "cannot be definitely removed.", pp->name); 936 } else { 937 G_ELI_DEBUG(1, 938 "Device %s is still open (r%dw%de%d).", pp->name, 939 pp->acr, pp->acw, pp->ace); 940 return (EBUSY); 941 } 942 } 943 944 mtx_lock(&sc->sc_queue_mtx); 945 sc->sc_flags |= G_ELI_FLAG_DESTROY; 946 wakeup(sc); 947 while (!LIST_EMPTY(&sc->sc_workers)) { 948 msleep(&sc->sc_workers, &sc->sc_queue_mtx, PRIBIO, 949 "geli:destroy", 0); 950 } 951 mtx_destroy(&sc->sc_queue_mtx); 952 gp->softc = NULL; 953 if (sc->sc_ekeys != NULL) { 954 /* The sc_ekeys field can be NULL is device is suspended. */ 955 bzero(sc->sc_ekeys, 956 sc->sc_nekeys * (sizeof(uint8_t *) + G_ELI_DATAKEYLEN)); 957 free(sc->sc_ekeys, M_ELI); 958 } 959 bzero(sc, sizeof(*sc)); 960 free(sc, M_ELI); 961 962 if (pp == NULL || (pp->acr == 0 && pp->acw == 0 && pp->ace == 0)) 963 G_ELI_DEBUG(0, "Device %s destroyed.", gp->name); 964 g_wither_geom_close(gp, ENXIO); 965 966 return (0); 967 } 968 969 static int 970 g_eli_destroy_geom(struct gctl_req *req __unused, 971 struct g_class *mp __unused, struct g_geom *gp) 972 { 973 struct g_eli_softc *sc; 974 975 sc = gp->softc; 976 return (g_eli_destroy(sc, FALSE)); 977 } 978 979 static int 980 g_eli_keyfiles_load(struct hmac_ctx *ctx, const char *provider) 981 { 982 u_char *keyfile, *data, *size; 983 char *file, name[64]; 984 int i; 985 986 for (i = 0; ; i++) { 987 snprintf(name, sizeof(name), "%s:geli_keyfile%d", provider, i); 988 keyfile = preload_search_by_type(name); 989 if (keyfile == NULL) 990 return (i); /* Return number of loaded keyfiles. */ 991 data = preload_search_info(keyfile, MODINFO_ADDR); 992 if (data == NULL) { 993 G_ELI_DEBUG(0, "Cannot find key file data for %s.", 994 name); 995 return (0); 996 } 997 data = *(void **)data; 998 size = preload_search_info(keyfile, MODINFO_SIZE); 999 if (size == NULL) { 1000 G_ELI_DEBUG(0, "Cannot find key file size for %s.", 1001 name); 1002 return (0); 1003 } 1004 file = preload_search_info(keyfile, MODINFO_NAME); 1005 if (file == NULL) { 1006 G_ELI_DEBUG(0, "Cannot find key file name for %s.", 1007 name); 1008 return (0); 1009 } 1010 G_ELI_DEBUG(1, "Loaded keyfile %s for %s (type: %s).", file, 1011 provider, name); 1012 g_eli_crypto_hmac_update(ctx, data, *(size_t *)size); 1013 } 1014 } 1015 1016 static void 1017 g_eli_keyfiles_clear(const char *provider) 1018 { 1019 u_char *keyfile, *data, *size; 1020 char name[64]; 1021 int i; 1022 1023 for (i = 0; ; i++) { 1024 snprintf(name, sizeof(name), "%s:geli_keyfile%d", provider, i); 1025 keyfile = preload_search_by_type(name); 1026 if (keyfile == NULL) 1027 return; 1028 data = preload_search_info(keyfile, MODINFO_ADDR); 1029 size = preload_search_info(keyfile, MODINFO_SIZE); 1030 if (data == NULL || size == NULL) 1031 continue; 1032 data = *(void **)data; 1033 bzero(data, *(size_t *)size); 1034 } 1035 } 1036 1037 /* 1038 * Tasting is only made on boot. 1039 * We detect providers which should be attached before root is mounted. 1040 */ 1041 static struct g_geom * 1042 g_eli_taste(struct g_class *mp, struct g_provider *pp, int flags __unused) 1043 { 1044 struct g_eli_metadata md; 1045 struct g_geom *gp; 1046 struct hmac_ctx ctx; 1047 char passphrase[256]; 1048 u_char key[G_ELI_USERKEYLEN], mkey[G_ELI_DATAIVKEYLEN]; 1049 u_int i, nkey, nkeyfiles, tries; 1050 int error; 1051 1052 g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name); 1053 g_topology_assert(); 1054 1055 if (root_mounted() || g_eli_tries == 0) 1056 return (NULL); 1057 1058 G_ELI_DEBUG(3, "Tasting %s.", pp->name); 1059 1060 error = g_eli_read_metadata(mp, pp, &md); 1061 if (error != 0) 1062 return (NULL); 1063 gp = NULL; 1064 1065 if (strcmp(md.md_magic, G_ELI_MAGIC) != 0) 1066 return (NULL); 1067 if (md.md_version > G_ELI_VERSION) { 1068 printf("geom_eli.ko module is too old to handle %s.\n", 1069 pp->name); 1070 return (NULL); 1071 } 1072 if (md.md_provsize != pp->mediasize) 1073 return (NULL); 1074 /* Should we attach it on boot? */ 1075 if (!(md.md_flags & G_ELI_FLAG_BOOT)) 1076 return (NULL); 1077 if (md.md_keys == 0x00) { 1078 G_ELI_DEBUG(0, "No valid keys on %s.", pp->name); 1079 return (NULL); 1080 } 1081 if (md.md_iterations == -1) { 1082 /* If there is no passphrase, we try only once. */ 1083 tries = 1; 1084 } else { 1085 /* Ask for the passphrase no more than g_eli_tries times. */ 1086 tries = g_eli_tries; 1087 } 1088 1089 for (i = 0; i < tries; i++) { 1090 g_eli_crypto_hmac_init(&ctx, NULL, 0); 1091 1092 /* 1093 * Load all key files. 1094 */ 1095 nkeyfiles = g_eli_keyfiles_load(&ctx, pp->name); 1096 1097 if (nkeyfiles == 0 && md.md_iterations == -1) { 1098 /* 1099 * No key files and no passphrase, something is 1100 * definitely wrong here. 1101 * geli(8) doesn't allow for such situation, so assume 1102 * that there was really no passphrase and in that case 1103 * key files are no properly defined in loader.conf. 1104 */ 1105 G_ELI_DEBUG(0, 1106 "Found no key files in loader.conf for %s.", 1107 pp->name); 1108 return (NULL); 1109 } 1110 1111 /* Ask for the passphrase if defined. */ 1112 if (md.md_iterations >= 0) { 1113 printf("Enter passphrase for %s: ", pp->name); 1114 gets(passphrase, sizeof(passphrase), 1115 g_eli_visible_passphrase); 1116 } 1117 1118 /* 1119 * Prepare Derived-Key from the user passphrase. 1120 */ 1121 if (md.md_iterations == 0) { 1122 g_eli_crypto_hmac_update(&ctx, md.md_salt, 1123 sizeof(md.md_salt)); 1124 g_eli_crypto_hmac_update(&ctx, passphrase, 1125 strlen(passphrase)); 1126 bzero(passphrase, sizeof(passphrase)); 1127 } else if (md.md_iterations > 0) { 1128 u_char dkey[G_ELI_USERKEYLEN]; 1129 1130 pkcs5v2_genkey(dkey, sizeof(dkey), md.md_salt, 1131 sizeof(md.md_salt), passphrase, md.md_iterations); 1132 bzero(passphrase, sizeof(passphrase)); 1133 g_eli_crypto_hmac_update(&ctx, dkey, sizeof(dkey)); 1134 bzero(dkey, sizeof(dkey)); 1135 } 1136 1137 g_eli_crypto_hmac_final(&ctx, key, 0); 1138 1139 /* 1140 * Decrypt Master-Key. 1141 */ 1142 error = g_eli_mkey_decrypt(&md, key, mkey, &nkey); 1143 bzero(key, sizeof(key)); 1144 if (error == -1) { 1145 if (i == tries - 1) { 1146 G_ELI_DEBUG(0, 1147 "Wrong key for %s. No tries left.", 1148 pp->name); 1149 g_eli_keyfiles_clear(pp->name); 1150 return (NULL); 1151 } 1152 G_ELI_DEBUG(0, "Wrong key for %s. Tries left: %u.", 1153 pp->name, tries - i - 1); 1154 /* Try again. */ 1155 continue; 1156 } else if (error > 0) { 1157 G_ELI_DEBUG(0, "Cannot decrypt Master Key for %s (error=%d).", 1158 pp->name, error); 1159 g_eli_keyfiles_clear(pp->name); 1160 return (NULL); 1161 } 1162 G_ELI_DEBUG(1, "Using Master Key %u for %s.", nkey, pp->name); 1163 break; 1164 } 1165 1166 /* 1167 * We have correct key, let's attach provider. 1168 */ 1169 gp = g_eli_create(NULL, mp, pp, &md, mkey, nkey); 1170 bzero(mkey, sizeof(mkey)); 1171 bzero(&md, sizeof(md)); 1172 if (gp == NULL) { 1173 G_ELI_DEBUG(0, "Cannot create device %s%s.", pp->name, 1174 G_ELI_SUFFIX); 1175 return (NULL); 1176 } 1177 return (gp); 1178 } 1179 1180 static void 1181 g_eli_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, 1182 struct g_consumer *cp, struct g_provider *pp) 1183 { 1184 struct g_eli_softc *sc; 1185 1186 g_topology_assert(); 1187 sc = gp->softc; 1188 if (sc == NULL) 1189 return; 1190 if (pp != NULL || cp != NULL) 1191 return; /* Nothing here. */ 1192 sbuf_printf(sb, "%s<Flags>", indent); 1193 if (sc->sc_flags == 0) 1194 sbuf_printf(sb, "NONE"); 1195 else { 1196 int first = 1; 1197 1198 #define ADD_FLAG(flag, name) do { \ 1199 if (sc->sc_flags & (flag)) { \ 1200 if (!first) \ 1201 sbuf_printf(sb, ", "); \ 1202 else \ 1203 first = 0; \ 1204 sbuf_printf(sb, name); \ 1205 } \ 1206 } while (0) 1207 ADD_FLAG(G_ELI_FLAG_SUSPEND, "SUSPEND"); 1208 ADD_FLAG(G_ELI_FLAG_SINGLE_KEY, "SINGLE-KEY"); 1209 ADD_FLAG(G_ELI_FLAG_NATIVE_BYTE_ORDER, "NATIVE-BYTE-ORDER"); 1210 ADD_FLAG(G_ELI_FLAG_ONETIME, "ONETIME"); 1211 ADD_FLAG(G_ELI_FLAG_BOOT, "BOOT"); 1212 ADD_FLAG(G_ELI_FLAG_WO_DETACH, "W-DETACH"); 1213 ADD_FLAG(G_ELI_FLAG_RW_DETACH, "RW-DETACH"); 1214 ADD_FLAG(G_ELI_FLAG_AUTH, "AUTH"); 1215 ADD_FLAG(G_ELI_FLAG_WOPEN, "W-OPEN"); 1216 ADD_FLAG(G_ELI_FLAG_DESTROY, "DESTROY"); 1217 ADD_FLAG(G_ELI_FLAG_RO, "READ-ONLY"); 1218 #undef ADD_FLAG 1219 } 1220 sbuf_printf(sb, "</Flags>\n"); 1221 1222 if (!(sc->sc_flags & G_ELI_FLAG_ONETIME)) { 1223 sbuf_printf(sb, "%s<UsedKey>%u</UsedKey>\n", indent, 1224 sc->sc_nkey); 1225 } 1226 sbuf_printf(sb, "%s<Crypto>", indent); 1227 switch (sc->sc_crypto) { 1228 case G_ELI_CRYPTO_HW: 1229 sbuf_printf(sb, "hardware"); 1230 break; 1231 case G_ELI_CRYPTO_SW: 1232 sbuf_printf(sb, "software"); 1233 break; 1234 default: 1235 sbuf_printf(sb, "UNKNOWN"); 1236 break; 1237 } 1238 sbuf_printf(sb, "</Crypto>\n"); 1239 if (sc->sc_flags & G_ELI_FLAG_AUTH) { 1240 sbuf_printf(sb, 1241 "%s<AuthenticationAlgorithm>%s</AuthenticationAlgorithm>\n", 1242 indent, g_eli_algo2str(sc->sc_aalgo)); 1243 } 1244 sbuf_printf(sb, "%s<KeyLength>%u</KeyLength>\n", indent, 1245 sc->sc_ekeylen); 1246 sbuf_printf(sb, "%s<EncryptionAlgorithm>%s</EncryptionAlgorithm>\n", indent, 1247 g_eli_algo2str(sc->sc_ealgo)); 1248 sbuf_printf(sb, "%s<State>%s</State>\n", indent, 1249 (sc->sc_flags & G_ELI_FLAG_SUSPEND) ? "SUSPENDED" : "ACTIVE"); 1250 } 1251 1252 static void 1253 g_eli_shutdown_pre_sync(void *arg, int howto) 1254 { 1255 struct g_class *mp; 1256 struct g_geom *gp, *gp2; 1257 struct g_provider *pp; 1258 struct g_eli_softc *sc; 1259 int error; 1260 1261 mp = arg; 1262 DROP_GIANT(); 1263 g_topology_lock(); 1264 LIST_FOREACH_SAFE(gp, &mp->geom, geom, gp2) { 1265 sc = gp->softc; 1266 if (sc == NULL) 1267 continue; 1268 pp = LIST_FIRST(&gp->provider); 1269 KASSERT(pp != NULL, ("No provider? gp=%p (%s)", gp, gp->name)); 1270 if (pp->acr + pp->acw + pp->ace == 0) 1271 error = g_eli_destroy(sc, TRUE); 1272 else { 1273 sc->sc_flags |= G_ELI_FLAG_RW_DETACH; 1274 gp->access = g_eli_access; 1275 } 1276 } 1277 g_topology_unlock(); 1278 PICKUP_GIANT(); 1279 } 1280 1281 static void 1282 g_eli_init(struct g_class *mp) 1283 { 1284 1285 g_eli_pre_sync = EVENTHANDLER_REGISTER(shutdown_pre_sync, 1286 g_eli_shutdown_pre_sync, mp, SHUTDOWN_PRI_FIRST); 1287 if (g_eli_pre_sync == NULL) 1288 G_ELI_DEBUG(0, "Warning! Cannot register shutdown event."); 1289 } 1290 1291 static void 1292 g_eli_fini(struct g_class *mp) 1293 { 1294 1295 if (g_eli_pre_sync != NULL) 1296 EVENTHANDLER_DEREGISTER(shutdown_pre_sync, g_eli_pre_sync); 1297 } 1298 1299 DECLARE_GEOM_CLASS(g_eli_class, g_eli); 1300 MODULE_DEPEND(g_eli, crypto, 1, 1, 1);
Cache object: d35a7ea9968890d5e1a4e9cac961face
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]