crypto.c revision 1.128
1 /* $NetBSD: crypto.c,v 1.128 2022/05/22 11:40:15 riastradh Exp $ */ 2 /* $FreeBSD: src/sys/opencrypto/crypto.c,v 1.4.2.5 2003/02/26 00:14:05 sam Exp $ */ 3 /* $OpenBSD: crypto.c,v 1.41 2002/07/17 23:52:38 art Exp $ */ 4 5 /*- 6 * Copyright (c) 2008 The NetBSD Foundation, Inc. 7 * All rights reserved. 8 * 9 * This code is derived from software contributed to The NetBSD Foundation 10 * by Coyote Point Systems, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 /* 35 * The author of this code is Angelos D. Keromytis (angelos (at) cis.upenn.edu) 36 * 37 * This code was written by Angelos D. Keromytis in Athens, Greece, in 38 * February 2000. Network Security Technologies Inc. (NSTI) kindly 39 * supported the development of this code. 40 * 41 * Copyright (c) 2000, 2001 Angelos D. Keromytis 42 * 43 * Permission to use, copy, and modify this software with or without fee 44 * is hereby granted, provided that this entire notice is included in 45 * all source code copies of any software which is or includes a copy or 46 * modification of this software. 47 * 48 * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR 49 * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY 50 * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE 51 * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR 52 * PURPOSE. 53 */ 54 55 #include <sys/cdefs.h> 56 __KERNEL_RCSID(0, "$NetBSD: crypto.c,v 1.128 2022/05/22 11:40:15 riastradh Exp $"); 57 58 #include <sys/param.h> 59 #include <sys/reboot.h> 60 #include <sys/systm.h> 61 #include <sys/proc.h> 62 #include <sys/pool.h> 63 #include <sys/kthread.h> 64 #include <sys/once.h> 65 #include <sys/sysctl.h> 66 #include <sys/intr.h> 67 #include <sys/errno.h> 68 #include <sys/module.h> 69 #include <sys/xcall.h> 70 #include <sys/device.h> 71 #include <sys/cpu.h> 72 #include <sys/percpu.h> 73 #include <sys/kmem.h> 74 75 #if defined(_KERNEL_OPT) 76 #include "opt_ocf.h" 77 #endif 78 79 #include <opencrypto/cryptodev.h> 80 #include <opencrypto/xform.h> /* XXX for M_XDATA */ 81 82 /* 83 * Crypto drivers register themselves by allocating a slot in the 84 * crypto_drivers table with crypto_get_driverid() and then registering 85 * each algorithm they support with crypto_register() and crypto_kregister(). 86 */ 87 /* Don't directly access crypto_drivers[i], use crypto_checkdriver(i). */ 88 static struct { 89 kmutex_t mtx; 90 int num; 91 struct cryptocap *list; 92 } crypto_drv __cacheline_aligned; 93 #define crypto_drv_mtx (crypto_drv.mtx) 94 #define crypto_drivers_num (crypto_drv.num) 95 #define crypto_drivers (crypto_drv.list) 96 97 static void *crypto_q_si; 98 static void *crypto_ret_si; 99 100 /* 101 * There are two queues for crypto requests; one for symmetric (e.g. 102 * cipher) operations and one for asymmetric (e.g. MOD) operations. 103 * See below for how synchronization is handled. 104 */ 105 TAILQ_HEAD(crypto_crp_q, cryptop); 106 TAILQ_HEAD(crypto_crp_kq, cryptkop); 107 struct crypto_crp_qs { 108 struct crypto_crp_q *crp_q; 109 struct crypto_crp_kq *crp_kq; 110 }; 111 static percpu_t *crypto_crp_qs_percpu; 112 113 static inline struct crypto_crp_qs * 114 crypto_get_crp_qs(int *s) 115 { 116 117 KASSERT(s != NULL); 118 119 *s = splsoftnet(); 120 return percpu_getref(crypto_crp_qs_percpu); 121 } 122 123 static inline void 124 crypto_put_crp_qs(int *s) 125 { 126 127 KASSERT(s != NULL); 128 129 percpu_putref(crypto_crp_qs_percpu); 130 splx(*s); 131 } 132 133 static void 134 crypto_crp_q_is_busy_pc(void *p, void *arg, struct cpu_info *ci __unused) 135 { 136 struct crypto_crp_qs *qs_pc = p; 137 bool *isempty = arg; 138 139 if (!TAILQ_EMPTY(qs_pc->crp_q) || !TAILQ_EMPTY(qs_pc->crp_kq)) 140 *isempty = true; 141 } 142 143 static void 144 crypto_crp_qs_init_pc(void *p, void *arg __unused, struct cpu_info *ci __unused) 145 { 146 struct crypto_crp_qs *qs = p; 147 148 qs->crp_q = kmem_alloc(sizeof(struct crypto_crp_q), KM_SLEEP); 149 qs->crp_kq = kmem_alloc(sizeof(struct crypto_crp_kq), KM_SLEEP); 150 151 TAILQ_INIT(qs->crp_q); 152 TAILQ_INIT(qs->crp_kq); 153 } 154 155 /* 156 * There are two queues for processing completed crypto requests; one 157 * for the symmetric and one for the asymmetric ops. We only need one 158 * but have two to avoid type futzing (cryptop vs. cryptkop). See below 159 * for how synchronization is handled. 160 */ 161 TAILQ_HEAD(crypto_crp_ret_q, cryptop); 162 TAILQ_HEAD(crypto_crp_ret_kq, cryptkop); 163 struct crypto_crp_ret_qs { 164 kmutex_t crp_ret_q_mtx; 165 bool crp_ret_q_exit_flag; 166 167 struct crypto_crp_ret_q crp_ret_q; 168 int crp_ret_q_len; 169 int crp_ret_q_maxlen; /* queue length limit. <=0 means unlimited. */ 170 int crp_ret_q_drops; 171 172 struct crypto_crp_ret_kq crp_ret_kq; 173 int crp_ret_kq_len; 174 int crp_ret_kq_maxlen; /* queue length limit. <=0 means unlimited. */ 175 int crp_ret_kq_drops; 176 }; 177 struct crypto_crp_ret_qs **crypto_crp_ret_qs_list; 178 179 180 static inline struct crypto_crp_ret_qs * 181 crypto_get_crp_ret_qs(struct cpu_info *ci) 182 { 183 u_int cpuid; 184 struct crypto_crp_ret_qs *qs; 185 186 KASSERT(ci != NULL); 187 188 cpuid = cpu_index(ci); 189 qs = crypto_crp_ret_qs_list[cpuid]; 190 mutex_enter(&qs->crp_ret_q_mtx); 191 return qs; 192 } 193 194 static inline void 195 crypto_put_crp_ret_qs(struct cpu_info *ci) 196 { 197 u_int cpuid; 198 struct crypto_crp_ret_qs *qs; 199 200 KASSERT(ci != NULL); 201 202 cpuid = cpu_index(ci); 203 qs = crypto_crp_ret_qs_list[cpuid]; 204 mutex_exit(&qs->crp_ret_q_mtx); 205 } 206 207 #ifndef CRYPTO_RET_Q_MAXLEN 208 #define CRYPTO_RET_Q_MAXLEN 0 209 #endif 210 #ifndef CRYPTO_RET_KQ_MAXLEN 211 #define CRYPTO_RET_KQ_MAXLEN 0 212 #endif 213 214 static int 215 sysctl_opencrypto_q_len(SYSCTLFN_ARGS) 216 { 217 int error, len = 0; 218 struct sysctlnode node = *rnode; 219 220 for (int i = 0; i < ncpu; i++) { 221 struct crypto_crp_ret_qs *qs; 222 struct cpu_info *ci = cpu_lookup(i); 223 224 qs = crypto_get_crp_ret_qs(ci); 225 len += qs->crp_ret_q_len; 226 crypto_put_crp_ret_qs(ci); 227 } 228 229 node.sysctl_data = &len; 230 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 231 if (error || newp == NULL) 232 return error; 233 234 return 0; 235 } 236 237 static int 238 sysctl_opencrypto_q_drops(SYSCTLFN_ARGS) 239 { 240 int error, drops = 0; 241 struct sysctlnode node = *rnode; 242 243 for (int i = 0; i < ncpu; i++) { 244 struct crypto_crp_ret_qs *qs; 245 struct cpu_info *ci = cpu_lookup(i); 246 247 qs = crypto_get_crp_ret_qs(ci); 248 drops += qs->crp_ret_q_drops; 249 crypto_put_crp_ret_qs(ci); 250 } 251 252 node.sysctl_data = &drops; 253 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 254 if (error || newp == NULL) 255 return error; 256 257 return 0; 258 } 259 260 static int 261 sysctl_opencrypto_q_maxlen(SYSCTLFN_ARGS) 262 { 263 int error, maxlen; 264 struct crypto_crp_ret_qs *qs; 265 struct sysctlnode node = *rnode; 266 267 /* each crp_ret_kq_maxlen is the same. */ 268 qs = crypto_get_crp_ret_qs(curcpu()); 269 maxlen = qs->crp_ret_q_maxlen; 270 crypto_put_crp_ret_qs(curcpu()); 271 272 node.sysctl_data = &maxlen; 273 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 274 if (error || newp == NULL) 275 return error; 276 277 for (int i = 0; i < ncpu; i++) { 278 struct cpu_info *ci = cpu_lookup(i); 279 280 qs = crypto_get_crp_ret_qs(ci); 281 qs->crp_ret_q_maxlen = maxlen; 282 crypto_put_crp_ret_qs(ci); 283 } 284 285 return 0; 286 } 287 288 static int 289 sysctl_opencrypto_kq_len(SYSCTLFN_ARGS) 290 { 291 int error, len = 0; 292 struct sysctlnode node = *rnode; 293 294 for (int i = 0; i < ncpu; i++) { 295 struct crypto_crp_ret_qs *qs; 296 struct cpu_info *ci = cpu_lookup(i); 297 298 qs = crypto_get_crp_ret_qs(ci); 299 len += qs->crp_ret_kq_len; 300 crypto_put_crp_ret_qs(ci); 301 } 302 303 node.sysctl_data = &len; 304 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 305 if (error || newp == NULL) 306 return error; 307 308 return 0; 309 } 310 311 static int 312 sysctl_opencrypto_kq_drops(SYSCTLFN_ARGS) 313 { 314 int error, drops = 0; 315 struct sysctlnode node = *rnode; 316 317 for (int i = 0; i < ncpu; i++) { 318 struct crypto_crp_ret_qs *qs; 319 struct cpu_info *ci = cpu_lookup(i); 320 321 qs = crypto_get_crp_ret_qs(ci); 322 drops += qs->crp_ret_kq_drops; 323 crypto_put_crp_ret_qs(ci); 324 } 325 326 node.sysctl_data = &drops; 327 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 328 if (error || newp == NULL) 329 return error; 330 331 return 0; 332 } 333 334 static int 335 sysctl_opencrypto_kq_maxlen(SYSCTLFN_ARGS) 336 { 337 int error, maxlen; 338 struct crypto_crp_ret_qs *qs; 339 struct sysctlnode node = *rnode; 340 341 /* each crp_ret_kq_maxlen is the same. */ 342 qs = crypto_get_crp_ret_qs(curcpu()); 343 maxlen = qs->crp_ret_kq_maxlen; 344 crypto_put_crp_ret_qs(curcpu()); 345 346 node.sysctl_data = &maxlen; 347 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 348 if (error || newp == NULL) 349 return error; 350 351 for (int i = 0; i < ncpu; i++) { 352 struct cpu_info *ci = cpu_lookup(i); 353 354 qs = crypto_get_crp_ret_qs(ci); 355 qs->crp_ret_kq_maxlen = maxlen; 356 crypto_put_crp_ret_qs(ci); 357 } 358 359 return 0; 360 } 361 362 /* 363 * Crypto op and descriptor data structures are allocated 364 * from separate private zones(FreeBSD)/pools(netBSD/OpenBSD) . 365 */ 366 static pool_cache_t cryptop_cache; 367 static pool_cache_t cryptodesc_cache; 368 static pool_cache_t cryptkop_cache; 369 370 int crypto_usercrypto = 1; /* userland may open /dev/crypto */ 371 int crypto_userasymcrypto = 1; /* userland may do asym crypto reqs */ 372 /* 373 * cryptodevallowsoft is (intended to be) sysctl'able, controlling 374 * access to hardware versus software transforms as below: 375 * 376 * crypto_devallowsoft < 0: Force userlevel requests to use software 377 * transforms, always 378 * crypto_devallowsoft = 0: Use hardware if present, grant userlevel 379 * requests for non-accelerated transforms 380 * (handling the latter in software) 381 * crypto_devallowsoft > 0: Allow user requests only for transforms which 382 * are hardware-accelerated. 383 */ 384 int crypto_devallowsoft = 1; /* only use hardware crypto */ 385 386 static void 387 sysctl_opencrypto_setup(struct sysctllog **clog) 388 { 389 const struct sysctlnode *ocnode; 390 const struct sysctlnode *retqnode, *retkqnode; 391 392 sysctl_createv(clog, 0, NULL, NULL, 393 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 394 CTLTYPE_INT, "usercrypto", 395 SYSCTL_DESCR("Enable/disable user-mode access to " 396 "crypto support"), 397 NULL, 0, &crypto_usercrypto, 0, 398 CTL_KERN, CTL_CREATE, CTL_EOL); 399 sysctl_createv(clog, 0, NULL, NULL, 400 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 401 CTLTYPE_INT, "userasymcrypto", 402 SYSCTL_DESCR("Enable/disable user-mode access to " 403 "asymmetric crypto support"), 404 NULL, 0, &crypto_userasymcrypto, 0, 405 CTL_KERN, CTL_CREATE, CTL_EOL); 406 sysctl_createv(clog, 0, NULL, NULL, 407 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 408 CTLTYPE_INT, "cryptodevallowsoft", 409 SYSCTL_DESCR("Enable/disable use of software " 410 "asymmetric crypto support"), 411 NULL, 0, &crypto_devallowsoft, 0, 412 CTL_KERN, CTL_CREATE, CTL_EOL); 413 414 sysctl_createv(clog, 0, NULL, &ocnode, 415 CTLFLAG_PERMANENT, 416 CTLTYPE_NODE, "opencrypto", 417 SYSCTL_DESCR("opencrypto related entries"), 418 NULL, 0, NULL, 0, 419 CTL_CREATE, CTL_EOL); 420 421 sysctl_createv(clog, 0, &ocnode, &retqnode, 422 CTLFLAG_PERMANENT, 423 CTLTYPE_NODE, "crypto_ret_q", 424 SYSCTL_DESCR("crypto_ret_q related entries"), 425 NULL, 0, NULL, 0, 426 CTL_CREATE, CTL_EOL); 427 sysctl_createv(clog, 0, &retqnode, NULL, 428 CTLFLAG_PERMANENT|CTLFLAG_READONLY, 429 CTLTYPE_INT, "len", 430 SYSCTL_DESCR("Current queue length"), 431 sysctl_opencrypto_q_len, 0, 432 NULL, 0, 433 CTL_CREATE, CTL_EOL); 434 sysctl_createv(clog, 0, &retqnode, NULL, 435 CTLFLAG_PERMANENT|CTLFLAG_READONLY, 436 CTLTYPE_INT, "drops", 437 SYSCTL_DESCR("Crypto requests dropped due to full ret queue"), 438 sysctl_opencrypto_q_drops, 0, 439 NULL, 0, 440 CTL_CREATE, CTL_EOL); 441 sysctl_createv(clog, 0, &retqnode, NULL, 442 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 443 CTLTYPE_INT, "maxlen", 444 SYSCTL_DESCR("Maximum allowed queue length"), 445 sysctl_opencrypto_q_maxlen, 0, 446 NULL, 0, 447 CTL_CREATE, CTL_EOL); 448 449 450 sysctl_createv(clog, 0, &ocnode, &retkqnode, 451 CTLFLAG_PERMANENT, 452 CTLTYPE_NODE, "crypto_ret_kq", 453 SYSCTL_DESCR("crypto_ret_kq related entries"), 454 NULL, 0, NULL, 0, 455 CTL_CREATE, CTL_EOL); 456 sysctl_createv(clog, 0, &retkqnode, NULL, 457 CTLFLAG_PERMANENT|CTLFLAG_READONLY, 458 CTLTYPE_INT, "len", 459 SYSCTL_DESCR("Current queue length"), 460 sysctl_opencrypto_kq_len, 0, 461 NULL, 0, 462 CTL_CREATE, CTL_EOL); 463 sysctl_createv(clog, 0, &retkqnode, NULL, 464 CTLFLAG_PERMANENT|CTLFLAG_READONLY, 465 CTLTYPE_INT, "drops", 466 SYSCTL_DESCR("Crypto requests dropped due to full ret queue"), 467 sysctl_opencrypto_kq_drops, 0, 468 NULL, 0, 469 CTL_CREATE, CTL_EOL); 470 sysctl_createv(clog, 0, &retkqnode, NULL, 471 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 472 CTLTYPE_INT, "maxlen", 473 SYSCTL_DESCR("Maximum allowed queue length"), 474 sysctl_opencrypto_kq_maxlen, 0, 475 NULL, 0, 476 CTL_CREATE, CTL_EOL); 477 } 478 479 /* 480 * Synchronization: read carefully, this is non-trivial. 481 * 482 * Crypto requests are submitted via crypto_dispatch. Typically 483 * these come in from network protocols at spl0 (output path) or 484 * spl[,soft]net (input path). 485 * 486 * Requests are typically passed on the driver directly, but they 487 * may also be queued for processing by a software interrupt thread, 488 * cryptointr, that runs at splsoftcrypto. This thread dispatches 489 * the requests to crypto drivers (h/w or s/w) who call crypto_done 490 * when a request is complete. Hardware crypto drivers are assumed 491 * to register their IRQ's as network devices so their interrupt handlers 492 * and subsequent "done callbacks" happen at spl[imp,net]. 493 * 494 * Completed crypto ops are queued for a separate kernel thread that 495 * handles the callbacks at spl0. This decoupling insures the crypto 496 * driver interrupt service routine is not delayed while the callback 497 * takes place and that callbacks are delivered after a context switch 498 * (as opposed to a software interrupt that clients must block). 499 * 500 * This scheme is not intended for SMP machines. 501 */ 502 static void cryptointr(void *); /* swi thread to dispatch ops */ 503 static void cryptoret_softint(void *); /* kernel thread for callbacks*/ 504 static int crypto_destroy(bool); 505 static int crypto_invoke(struct cryptop *crp, int hint); 506 static int crypto_kinvoke(struct cryptkop *krp, int hint); 507 508 static struct cryptocap *crypto_checkdriver_lock(u_int32_t); 509 static struct cryptocap *crypto_checkdriver_uninit(u_int32_t); 510 static struct cryptocap *crypto_checkdriver(u_int32_t); 511 static void crypto_driver_lock(struct cryptocap *); 512 static void crypto_driver_unlock(struct cryptocap *); 513 static void crypto_driver_clear(struct cryptocap *); 514 515 static int crypto_init_finalize(device_t); 516 517 static struct cryptostats cryptostats; 518 #ifdef CRYPTO_TIMING 519 static int crypto_timing = 0; 520 #endif 521 522 static struct sysctllog *sysctl_opencrypto_clog; 523 524 static void 525 crypto_crp_ret_qs_init(void) 526 { 527 int i; 528 529 crypto_crp_ret_qs_list = kmem_alloc(sizeof(struct crypto_crp_ret_qs *) * ncpu, 530 KM_SLEEP); 531 532 for (i = 0; i < ncpu; i++) { 533 struct crypto_crp_ret_qs *qs; 534 535 qs = kmem_alloc(sizeof(struct crypto_crp_ret_qs), KM_SLEEP); 536 mutex_init(&qs->crp_ret_q_mtx, MUTEX_DEFAULT, IPL_NET); 537 qs->crp_ret_q_exit_flag = false; 538 539 TAILQ_INIT(&qs->crp_ret_q); 540 qs->crp_ret_q_len = 0; 541 qs->crp_ret_q_maxlen = CRYPTO_RET_Q_MAXLEN; 542 qs->crp_ret_q_drops = 0; 543 544 TAILQ_INIT(&qs->crp_ret_kq); 545 qs->crp_ret_kq_len = 0; 546 qs->crp_ret_kq_maxlen = CRYPTO_RET_KQ_MAXLEN; 547 qs->crp_ret_kq_drops = 0; 548 549 crypto_crp_ret_qs_list[i] = qs; 550 } 551 } 552 553 static int 554 crypto_init0(void) 555 { 556 557 mutex_init(&crypto_drv_mtx, MUTEX_DEFAULT, IPL_NONE); 558 cryptop_cache = pool_cache_init(sizeof(struct cryptop), 559 coherency_unit, 0, 0, "cryptop", NULL, IPL_NET, NULL, NULL, NULL); 560 cryptodesc_cache = pool_cache_init(sizeof(struct cryptodesc), 561 coherency_unit, 0, 0, "cryptdesc", NULL, IPL_NET, NULL, NULL, NULL); 562 cryptkop_cache = pool_cache_init(sizeof(struct cryptkop), 563 coherency_unit, 0, 0, "cryptkop", NULL, IPL_NET, NULL, NULL, NULL); 564 565 crypto_crp_qs_percpu = percpu_create(sizeof(struct crypto_crp_qs), 566 crypto_crp_qs_init_pc, /*XXX*/NULL, NULL); 567 568 crypto_crp_ret_qs_init(); 569 570 crypto_drivers = kmem_zalloc(CRYPTO_DRIVERS_INITIAL * 571 sizeof(struct cryptocap), KM_SLEEP); 572 crypto_drivers_num = CRYPTO_DRIVERS_INITIAL; 573 574 crypto_q_si = softint_establish(SOFTINT_NET|SOFTINT_MPSAFE, cryptointr, NULL); 575 if (crypto_q_si == NULL) { 576 printf("crypto_init: cannot establish request queue handler\n"); 577 return crypto_destroy(false); 578 } 579 580 /* 581 * Some encryption devices (such as mvcesa) are attached before 582 * ipi_sysinit(). That causes an assertion in ipi_register() as 583 * crypto_ret_si softint uses SOFTINT_RCPU. 584 */ 585 if (config_finalize_register(NULL, crypto_init_finalize) != 0) { 586 printf("crypto_init: cannot register crypto_init_finalize\n"); 587 return crypto_destroy(false); 588 } 589 590 sysctl_opencrypto_setup(&sysctl_opencrypto_clog); 591 592 return 0; 593 } 594 595 static int 596 crypto_init_finalize(device_t self __unused) 597 { 598 599 crypto_ret_si = softint_establish(SOFTINT_NET|SOFTINT_MPSAFE|SOFTINT_RCPU, 600 &cryptoret_softint, NULL); 601 KASSERT(crypto_ret_si != NULL); 602 603 return 0; 604 } 605 606 int 607 crypto_init(void) 608 { 609 static ONCE_DECL(crypto_init_once); 610 611 return RUN_ONCE(&crypto_init_once, crypto_init0); 612 } 613 614 static int 615 crypto_destroy(bool exit_kthread) 616 { 617 int i; 618 619 if (exit_kthread) { 620 struct cryptocap *cap = NULL; 621 bool is_busy = false; 622 623 /* if we have any in-progress requests, don't unload */ 624 percpu_foreach(crypto_crp_qs_percpu, crypto_crp_q_is_busy_pc, 625 &is_busy); 626 if (is_busy) 627 return EBUSY; 628 /* FIXME: 629 * prohibit enqueue to crp_q and crp_kq after here. 630 */ 631 632 mutex_enter(&crypto_drv_mtx); 633 for (i = 0; i < crypto_drivers_num; i++) { 634 cap = crypto_checkdriver(i); 635 if (cap == NULL) 636 continue; 637 if (cap->cc_sessions != 0) { 638 mutex_exit(&crypto_drv_mtx); 639 return EBUSY; 640 } 641 } 642 mutex_exit(&crypto_drv_mtx); 643 /* FIXME: 644 * prohibit touch crypto_drivers[] and each element after here. 645 */ 646 647 /* Ensure cryptoret_softint() is never scheduled again. */ 648 for (i = 0; i < ncpu; i++) { 649 struct crypto_crp_ret_qs *qs; 650 struct cpu_info *ci = cpu_lookup(i); 651 652 qs = crypto_get_crp_ret_qs(ci); 653 qs->crp_ret_q_exit_flag = true; 654 crypto_put_crp_ret_qs(ci); 655 } 656 } 657 658 if (sysctl_opencrypto_clog != NULL) 659 sysctl_teardown(&sysctl_opencrypto_clog); 660 661 if (crypto_ret_si != NULL) 662 softint_disestablish(crypto_ret_si); 663 664 if (crypto_q_si != NULL) 665 softint_disestablish(crypto_q_si); 666 667 mutex_enter(&crypto_drv_mtx); 668 if (crypto_drivers != NULL) 669 kmem_free(crypto_drivers, 670 crypto_drivers_num * sizeof(struct cryptocap)); 671 mutex_exit(&crypto_drv_mtx); 672 673 percpu_free(crypto_crp_qs_percpu, sizeof(struct crypto_crp_qs)); 674 675 pool_cache_destroy(cryptop_cache); 676 pool_cache_destroy(cryptodesc_cache); 677 pool_cache_destroy(cryptkop_cache); 678 679 mutex_destroy(&crypto_drv_mtx); 680 681 return 0; 682 } 683 684 static bool 685 crypto_driver_suitable(struct cryptocap *cap, struct cryptoini *cri) 686 { 687 struct cryptoini *cr; 688 689 for (cr = cri; cr; cr = cr->cri_next) 690 if (cap->cc_alg[cr->cri_alg] == 0) { 691 DPRINTF("alg %d not supported\n", cr->cri_alg); 692 return false; 693 } 694 695 return true; 696 } 697 698 #define CRYPTO_ACCEPT_HARDWARE 0x1 699 #define CRYPTO_ACCEPT_SOFTWARE 0x2 700 /* 701 * The algorithm we use here is pretty stupid; just use the 702 * first driver that supports all the algorithms we need. 703 * If there are multiple drivers we choose the driver with 704 * the fewest active sessions. We prefer hardware-backed 705 * drivers to software ones. 706 * 707 * XXX We need more smarts here (in real life too, but that's 708 * XXX another story altogether). 709 */ 710 static struct cryptocap * 711 crypto_select_driver_lock(struct cryptoini *cri, int hard) 712 { 713 u_int32_t hid; 714 int accept; 715 struct cryptocap *cap, *best; 716 int error = 0; 717 718 best = NULL; 719 /* 720 * hard == 0 can use both hardware and software drivers. 721 * We use hardware drivers prior to software drivers, so search 722 * hardware drivers at first time. 723 */ 724 if (hard >= 0) 725 accept = CRYPTO_ACCEPT_HARDWARE; 726 else 727 accept = CRYPTO_ACCEPT_SOFTWARE; 728 again: 729 for (hid = 0; hid < crypto_drivers_num; hid++) { 730 cap = crypto_checkdriver(hid); 731 if (cap == NULL) 732 continue; 733 734 crypto_driver_lock(cap); 735 736 /* 737 * If it's not initialized or has remaining sessions 738 * referencing it, skip. 739 */ 740 if (cap->cc_newsession == NULL || 741 (cap->cc_flags & CRYPTOCAP_F_CLEANUP)) { 742 crypto_driver_unlock(cap); 743 continue; 744 } 745 746 /* Hardware required -- ignore software drivers. */ 747 if ((accept & CRYPTO_ACCEPT_SOFTWARE) == 0 748 && (cap->cc_flags & CRYPTOCAP_F_SOFTWARE)) { 749 crypto_driver_unlock(cap); 750 continue; 751 } 752 /* Software required -- ignore hardware drivers. */ 753 if ((accept & CRYPTO_ACCEPT_HARDWARE) == 0 754 && (cap->cc_flags & CRYPTOCAP_F_SOFTWARE) == 0) { 755 crypto_driver_unlock(cap); 756 continue; 757 } 758 759 /* See if all the algorithms are supported. */ 760 if (crypto_driver_suitable(cap, cri)) { 761 if (best == NULL) { 762 /* keep holding crypto_driver_lock(cap) */ 763 best = cap; 764 continue; 765 } else if (cap->cc_sessions < best->cc_sessions) { 766 crypto_driver_unlock(best); 767 /* keep holding crypto_driver_lock(cap) */ 768 best = cap; 769 continue; 770 } 771 } 772 773 crypto_driver_unlock(cap); 774 } 775 if (best == NULL && hard == 0 776 && (accept & CRYPTO_ACCEPT_SOFTWARE) == 0) { 777 accept = CRYPTO_ACCEPT_SOFTWARE; 778 goto again; 779 } 780 781 if (best == NULL && hard == 0 && error == 0) { 782 mutex_exit(&crypto_drv_mtx); 783 error = module_autoload("swcrypto", MODULE_CLASS_DRIVER); 784 mutex_enter(&crypto_drv_mtx); 785 if (error == 0) { 786 error = EINVAL; 787 goto again; 788 } 789 } 790 791 return best; 792 } 793 794 /* 795 * Create a new session. 796 */ 797 int 798 crypto_newsession(u_int64_t *sid, struct cryptoini *cri, int hard) 799 { 800 struct cryptocap *cap; 801 int err = EINVAL; 802 803 /* 804 * On failure, leave *sid initialized to a sentinel value that 805 * crypto_freesession will ignore. This is the same as what 806 * you get from zero-initialized memory -- some callers (I'm 807 * looking at you, netipsec!) have paths that lead from 808 * zero-initialized memory into crypto_freesession without any 809 * crypto_newsession. 810 */ 811 *sid = 0; 812 813 mutex_enter(&crypto_drv_mtx); 814 815 cap = crypto_select_driver_lock(cri, hard); 816 if (cap != NULL) { 817 u_int32_t hid, lid; 818 819 hid = cap - crypto_drivers; 820 KASSERT(hid < 0xffffff); 821 /* 822 * Can't do everything in one session. 823 * 824 * XXX Fix this. We need to inject a "virtual" session layer right 825 * XXX about here. 826 */ 827 828 /* Call the driver initialization routine. */ 829 lid = hid; /* Pass the driver ID. */ 830 crypto_driver_unlock(cap); 831 err = cap->cc_newsession(cap->cc_arg, &lid, cri); 832 crypto_driver_lock(cap); 833 if (err == 0) { 834 (*sid) = hid + 1; 835 (*sid) <<= 32; 836 (*sid) |= (lid & 0xffffffff); 837 KASSERT(*sid != 0); 838 cap->cc_sessions++; 839 } else { 840 DPRINTF("crypto_drivers[%d].cc_newsession() failed. error=%d\n", 841 hid, err); 842 } 843 crypto_driver_unlock(cap); 844 } 845 846 mutex_exit(&crypto_drv_mtx); 847 848 return err; 849 } 850 851 /* 852 * Delete an existing session (or a reserved session on an unregistered 853 * driver). 854 */ 855 void 856 crypto_freesession(u_int64_t sid) 857 { 858 struct cryptocap *cap; 859 860 /* 861 * crypto_newsession never returns 0 as a sid (by virtue of 862 * never returning 0 as a hid, which is part of the sid). 863 * However, some callers assume that freeing zero is safe. 864 * Previously this relied on all drivers to agree that freeing 865 * invalid sids is a no-op, but that's a terrible API contract 866 * that we're getting rid of. 867 */ 868 if (sid == 0) 869 return; 870 871 /* Determine two IDs. */ 872 cap = crypto_checkdriver_lock(CRYPTO_SESID2HID(sid)); 873 if (cap == NULL) /* XXX should assert; need to audit callers */ 874 return; 875 876 if (cap->cc_sessions) 877 (cap->cc_sessions)--; 878 879 /* Call the driver cleanup routine, if available. */ 880 if (cap->cc_freesession) 881 cap->cc_freesession(cap->cc_arg, sid); 882 883 /* 884 * If this was the last session of a driver marked as invalid, 885 * make the entry available for reuse. 886 */ 887 if ((cap->cc_flags & CRYPTOCAP_F_CLEANUP) && cap->cc_sessions == 0) 888 crypto_driver_clear(cap); 889 890 crypto_driver_unlock(cap); 891 } 892 893 static bool 894 crypto_checkdriver_initialized(const struct cryptocap *cap) 895 { 896 897 return cap->cc_process != NULL || 898 (cap->cc_flags & CRYPTOCAP_F_CLEANUP) != 0 || 899 cap->cc_sessions != 0; 900 } 901 902 /* 903 * Return an unused driver id. Used by drivers prior to registering 904 * support for the algorithms they handle. 905 */ 906 int32_t 907 crypto_get_driverid(u_int32_t flags) 908 { 909 struct cryptocap *newdrv; 910 struct cryptocap *cap = NULL; 911 int i; 912 913 (void)crypto_init(); /* XXX oh, this is foul! */ 914 915 mutex_enter(&crypto_drv_mtx); 916 for (i = 0; i < crypto_drivers_num; i++) { 917 cap = crypto_checkdriver_uninit(i); 918 if (cap == NULL || crypto_checkdriver_initialized(cap)) 919 continue; 920 break; 921 } 922 923 /* Out of entries, allocate some more. */ 924 if (cap == NULL) { 925 /* Be careful about wrap-around. */ 926 if (2 * crypto_drivers_num <= crypto_drivers_num) { 927 mutex_exit(&crypto_drv_mtx); 928 printf("crypto: driver count wraparound!\n"); 929 return -1; 930 } 931 932 newdrv = kmem_zalloc(2 * crypto_drivers_num * 933 sizeof(struct cryptocap), KM_SLEEP); 934 memcpy(newdrv, crypto_drivers, 935 crypto_drivers_num * sizeof(struct cryptocap)); 936 kmem_free(crypto_drivers, 937 crypto_drivers_num * sizeof(struct cryptocap)); 938 939 crypto_drivers_num *= 2; 940 crypto_drivers = newdrv; 941 942 cap = crypto_checkdriver_uninit(i); 943 KASSERT(cap != NULL); 944 } 945 946 /* NB: state is zero'd on free */ 947 cap->cc_sessions = 1; /* Mark */ 948 cap->cc_flags = flags; 949 mutex_init(&cap->cc_lock, MUTEX_DEFAULT, IPL_NET); 950 951 if (bootverbose) 952 printf("crypto: assign driver %u, flags %u\n", i, flags); 953 954 mutex_exit(&crypto_drv_mtx); 955 956 return i; 957 } 958 959 static struct cryptocap * 960 crypto_checkdriver_lock(u_int32_t hid) 961 { 962 struct cryptocap *cap; 963 964 KASSERT(crypto_drivers != NULL); 965 966 if (hid >= crypto_drivers_num) 967 return NULL; 968 969 cap = &crypto_drivers[hid]; 970 mutex_enter(&cap->cc_lock); 971 return cap; 972 } 973 974 /* 975 * Use crypto_checkdriver_uninit() instead of crypto_checkdriver() below two 976 * situations 977 * - crypto_drivers[] may not be allocated 978 * - crypto_drivers[hid] may not be initialized 979 */ 980 static struct cryptocap * 981 crypto_checkdriver_uninit(u_int32_t hid) 982 { 983 984 KASSERT(mutex_owned(&crypto_drv_mtx)); 985 986 if (crypto_drivers == NULL) 987 return NULL; 988 989 return (hid >= crypto_drivers_num ? NULL : &crypto_drivers[hid]); 990 } 991 992 /* 993 * Use crypto_checkdriver_uninit() instead of crypto_checkdriver() below two 994 * situations 995 * - crypto_drivers[] may not be allocated 996 * - crypto_drivers[hid] may not be initialized 997 */ 998 static struct cryptocap * 999 crypto_checkdriver(u_int32_t hid) 1000 { 1001 1002 KASSERT(mutex_owned(&crypto_drv_mtx)); 1003 1004 if (crypto_drivers == NULL || hid >= crypto_drivers_num) 1005 return NULL; 1006 1007 struct cryptocap *cap = &crypto_drivers[hid]; 1008 return crypto_checkdriver_initialized(cap) ? cap : NULL; 1009 } 1010 1011 static inline void 1012 crypto_driver_lock(struct cryptocap *cap) 1013 { 1014 1015 KASSERT(cap != NULL); 1016 1017 mutex_enter(&cap->cc_lock); 1018 } 1019 1020 static inline void 1021 crypto_driver_unlock(struct cryptocap *cap) 1022 { 1023 1024 KASSERT(cap != NULL); 1025 1026 mutex_exit(&cap->cc_lock); 1027 } 1028 1029 static void 1030 crypto_driver_clear(struct cryptocap *cap) 1031 { 1032 1033 if (cap == NULL) 1034 return; 1035 1036 KASSERT(mutex_owned(&cap->cc_lock)); 1037 1038 cap->cc_sessions = 0; 1039 memset(&cap->cc_max_op_len, 0, sizeof(cap->cc_max_op_len)); 1040 memset(&cap->cc_alg, 0, sizeof(cap->cc_alg)); 1041 memset(&cap->cc_kalg, 0, sizeof(cap->cc_kalg)); 1042 cap->cc_flags = 0; 1043 cap->cc_qblocked = 0; 1044 cap->cc_kqblocked = 0; 1045 1046 cap->cc_arg = NULL; 1047 cap->cc_newsession = NULL; 1048 cap->cc_process = NULL; 1049 cap->cc_freesession = NULL; 1050 cap->cc_kprocess = NULL; 1051 } 1052 1053 /* 1054 * Register support for a key-related algorithm. This routine 1055 * is called once for each algorithm supported a driver. 1056 */ 1057 int 1058 crypto_kregister(u_int32_t driverid, int kalg, u_int32_t flags, 1059 int (*kprocess)(void *, struct cryptkop *, int), 1060 void *karg) 1061 { 1062 struct cryptocap *cap; 1063 int err; 1064 1065 mutex_enter(&crypto_drv_mtx); 1066 1067 cap = crypto_checkdriver_lock(driverid); 1068 if (cap != NULL && 1069 (CRK_ALGORITHM_MIN <= kalg && kalg <= CRK_ALGORITHM_MAX)) { 1070 /* 1071 * XXX Do some performance testing to determine placing. 1072 * XXX We probably need an auxiliary data structure that 1073 * XXX describes relative performances. 1074 */ 1075 1076 cap->cc_kalg[kalg] = flags | CRYPTO_ALG_FLAG_SUPPORTED; 1077 if (bootverbose) { 1078 printf("crypto: driver %u registers key alg %u " 1079 " flags %u\n", 1080 driverid, 1081 kalg, 1082 flags 1083 ); 1084 } 1085 1086 if (cap->cc_kprocess == NULL) { 1087 cap->cc_karg = karg; 1088 cap->cc_kprocess = kprocess; 1089 } 1090 err = 0; 1091 } else 1092 err = EINVAL; 1093 1094 mutex_exit(&crypto_drv_mtx); 1095 return err; 1096 } 1097 1098 /* 1099 * Register support for a non-key-related algorithm. This routine 1100 * is called once for each such algorithm supported by a driver. 1101 */ 1102 int 1103 crypto_register(u_int32_t driverid, int alg, u_int16_t maxoplen, 1104 u_int32_t flags, 1105 int (*newses)(void *, u_int32_t*, struct cryptoini*), 1106 void (*freeses)(void *, u_int64_t), 1107 int (*process)(void *, struct cryptop *, int), 1108 void *arg) 1109 { 1110 struct cryptocap *cap; 1111 int err; 1112 1113 cap = crypto_checkdriver_lock(driverid); 1114 if (cap == NULL) 1115 return EINVAL; 1116 1117 /* NB: algorithms are in the range [1..max] */ 1118 if (CRYPTO_ALGORITHM_MIN <= alg && alg <= CRYPTO_ALGORITHM_MAX) { 1119 /* 1120 * XXX Do some performance testing to determine placing. 1121 * XXX We probably need an auxiliary data structure that 1122 * XXX describes relative performances. 1123 */ 1124 1125 cap->cc_alg[alg] = flags | CRYPTO_ALG_FLAG_SUPPORTED; 1126 cap->cc_max_op_len[alg] = maxoplen; 1127 if (bootverbose) { 1128 printf("crypto: driver %u registers alg %u " 1129 "flags %u maxoplen %u\n", 1130 driverid, 1131 alg, 1132 flags, 1133 maxoplen 1134 ); 1135 } 1136 1137 if (cap->cc_process == NULL) { 1138 cap->cc_arg = arg; 1139 cap->cc_newsession = newses; 1140 cap->cc_process = process; 1141 cap->cc_freesession = freeses; 1142 cap->cc_sessions = 0; /* Unmark */ 1143 } 1144 err = 0; 1145 } else 1146 err = EINVAL; 1147 1148 crypto_driver_unlock(cap); 1149 1150 return err; 1151 } 1152 1153 static int 1154 crypto_unregister_locked(struct cryptocap *cap, int alg, bool all) 1155 { 1156 int i; 1157 u_int32_t ses; 1158 bool lastalg = true; 1159 1160 KASSERT(cap != NULL); 1161 KASSERT(mutex_owned(&cap->cc_lock)); 1162 1163 if (alg < CRYPTO_ALGORITHM_MIN || CRYPTO_ALGORITHM_MAX < alg) 1164 return EINVAL; 1165 1166 if (!all && cap->cc_alg[alg] == 0) 1167 return EINVAL; 1168 1169 cap->cc_alg[alg] = 0; 1170 cap->cc_max_op_len[alg] = 0; 1171 1172 if (all) { 1173 if (alg != CRYPTO_ALGORITHM_MAX) 1174 lastalg = false; 1175 } else { 1176 /* Was this the last algorithm ? */ 1177 for (i = CRYPTO_ALGORITHM_MIN; i <= CRYPTO_ALGORITHM_MAX; i++) 1178 if (cap->cc_alg[i] != 0) { 1179 lastalg = false; 1180 break; 1181 } 1182 } 1183 if (lastalg) { 1184 ses = cap->cc_sessions; 1185 crypto_driver_clear(cap); 1186 if (ses != 0) { 1187 /* 1188 * If there are pending sessions, just mark as invalid. 1189 */ 1190 cap->cc_flags |= CRYPTOCAP_F_CLEANUP; 1191 cap->cc_sessions = ses; 1192 } 1193 } 1194 1195 return 0; 1196 } 1197 1198 /* 1199 * Unregister a crypto driver. If there are pending sessions using it, 1200 * leave enough information around so that subsequent calls using those 1201 * sessions will correctly detect the driver has been unregistered and 1202 * reroute requests. 1203 */ 1204 int 1205 crypto_unregister(u_int32_t driverid, int alg) 1206 { 1207 int err; 1208 struct cryptocap *cap; 1209 1210 cap = crypto_checkdriver_lock(driverid); 1211 err = crypto_unregister_locked(cap, alg, false); 1212 crypto_driver_unlock(cap); 1213 1214 return err; 1215 } 1216 1217 /* 1218 * Unregister all algorithms associated with a crypto driver. 1219 * If there are pending sessions using it, leave enough information 1220 * around so that subsequent calls using those sessions will 1221 * correctly detect the driver has been unregistered and reroute 1222 * requests. 1223 */ 1224 int 1225 crypto_unregister_all(u_int32_t driverid) 1226 { 1227 int err, i; 1228 struct cryptocap *cap; 1229 1230 cap = crypto_checkdriver_lock(driverid); 1231 for (i = CRYPTO_ALGORITHM_MIN; i <= CRYPTO_ALGORITHM_MAX; i++) { 1232 err = crypto_unregister_locked(cap, i, true); 1233 if (err) 1234 break; 1235 } 1236 crypto_driver_unlock(cap); 1237 1238 return err; 1239 } 1240 1241 /* 1242 * Clear blockage on a driver. The what parameter indicates whether 1243 * the driver is now ready for cryptop's and/or cryptokop's. 1244 */ 1245 int 1246 crypto_unblock(u_int32_t driverid, int what) 1247 { 1248 struct cryptocap *cap; 1249 int needwakeup = 0; 1250 1251 cap = crypto_checkdriver_lock(driverid); 1252 if (cap == NULL) 1253 return EINVAL; 1254 1255 if (what & CRYPTO_SYMQ) { 1256 needwakeup |= cap->cc_qblocked; 1257 cap->cc_qblocked = 0; 1258 } 1259 if (what & CRYPTO_ASYMQ) { 1260 needwakeup |= cap->cc_kqblocked; 1261 cap->cc_kqblocked = 0; 1262 } 1263 crypto_driver_unlock(cap); 1264 if (needwakeup) { 1265 kpreempt_disable(); 1266 softint_schedule(crypto_q_si); 1267 kpreempt_enable(); 1268 } 1269 1270 return 0; 1271 } 1272 1273 /* 1274 * Dispatch a crypto request to a driver or queue 1275 * it, to be processed by the kernel thread. 1276 */ 1277 int 1278 crypto_dispatch(struct cryptop *crp) 1279 { 1280 int result, s; 1281 struct cryptocap *cap; 1282 struct crypto_crp_qs *crp_qs; 1283 struct crypto_crp_q *crp_q; 1284 1285 KASSERT(crp != NULL); 1286 KASSERT(crp->crp_callback != NULL); 1287 KASSERT(crp->crp_desc != NULL); 1288 KASSERT(crp->crp_buf != NULL); 1289 KASSERT(!cpu_intr_p()); 1290 1291 DPRINTF("crp %p, alg %d\n", crp, crp->crp_desc->crd_alg); 1292 1293 cryptostats.cs_ops++; 1294 1295 #ifdef CRYPTO_TIMING 1296 if (crypto_timing) 1297 nanouptime(&crp->crp_tstamp); 1298 #endif 1299 1300 if ((crp->crp_flags & CRYPTO_F_BATCH) != 0) { 1301 int wasempty; 1302 /* 1303 * Caller marked the request as ``ok to delay''; 1304 * queue it for the swi thread. This is desirable 1305 * when the operation is low priority and/or suitable 1306 * for batching. 1307 * 1308 * don't care list order in batch job. 1309 */ 1310 crp_qs = crypto_get_crp_qs(&s); 1311 crp_q = crp_qs->crp_q; 1312 wasempty = TAILQ_EMPTY(crp_q); 1313 TAILQ_INSERT_TAIL(crp_q, crp, crp_next); 1314 crypto_put_crp_qs(&s); 1315 crp_q = NULL; 1316 if (wasempty) { 1317 kpreempt_disable(); 1318 softint_schedule(crypto_q_si); 1319 kpreempt_enable(); 1320 } 1321 return 0; 1322 } 1323 1324 crp_qs = crypto_get_crp_qs(&s); 1325 crp_q = crp_qs->crp_q; 1326 cap = crypto_checkdriver_lock(CRYPTO_SESID2HID(crp->crp_sid)); 1327 /* 1328 * TODO: 1329 * If we can ensure the driver has been valid until the driver is 1330 * done crypto_unregister(), this migrate operation is not required. 1331 */ 1332 if (cap == NULL) { 1333 /* 1334 * The driver must be detached, so this request will migrate 1335 * to other drivers in cryptointr() later. 1336 */ 1337 TAILQ_INSERT_TAIL(crp_q, crp, crp_next); 1338 goto out; 1339 } 1340 1341 if (cap->cc_qblocked != 0) { 1342 crypto_driver_unlock(cap); 1343 /* 1344 * The driver is blocked, just queue the op until 1345 * it unblocks and the swi thread gets kicked. 1346 */ 1347 TAILQ_INSERT_TAIL(crp_q, crp, crp_next); 1348 goto out; 1349 } 1350 1351 /* 1352 * Caller marked the request to be processed 1353 * immediately; dispatch it directly to the 1354 * driver unless the driver is currently blocked. 1355 */ 1356 crypto_driver_unlock(cap); 1357 result = crypto_invoke(crp, 0); 1358 KASSERTMSG(result == 0 || result == ERESTART, "result=%d", result); 1359 if (result == ERESTART) { 1360 /* 1361 * The driver ran out of resources, mark the 1362 * driver ``blocked'' for cryptop's and put 1363 * the op on the queue. 1364 */ 1365 crypto_driver_lock(cap); 1366 cap->cc_qblocked = 1; 1367 crypto_driver_unlock(cap); 1368 TAILQ_INSERT_HEAD(crp_q, crp, crp_next); 1369 cryptostats.cs_blocks++; 1370 } 1371 1372 out: 1373 crypto_put_crp_qs(&s); 1374 return 0; 1375 } 1376 1377 /* 1378 * Add an asymmetric crypto request to a queue, 1379 * to be processed by the kernel thread. 1380 */ 1381 int 1382 crypto_kdispatch(struct cryptkop *krp) 1383 { 1384 int result, s; 1385 struct cryptocap *cap; 1386 struct crypto_crp_qs *crp_qs; 1387 struct crypto_crp_kq *crp_kq; 1388 1389 KASSERT(krp != NULL); 1390 KASSERT(krp->krp_callback != NULL); 1391 KASSERT(!cpu_intr_p()); 1392 1393 cryptostats.cs_kops++; 1394 1395 crp_qs = crypto_get_crp_qs(&s); 1396 crp_kq = crp_qs->crp_kq; 1397 cap = crypto_checkdriver_lock(krp->krp_hid); 1398 /* 1399 * TODO: 1400 * If we can ensure the driver has been valid until the driver is 1401 * done crypto_unregister(), this migrate operation is not required. 1402 */ 1403 if (cap == NULL) { 1404 TAILQ_INSERT_TAIL(crp_kq, krp, krp_next); 1405 goto out; 1406 } 1407 1408 if (cap->cc_kqblocked != 0) { 1409 crypto_driver_unlock(cap); 1410 /* 1411 * The driver is blocked, just queue the op until 1412 * it unblocks and the swi thread gets kicked. 1413 */ 1414 TAILQ_INSERT_TAIL(crp_kq, krp, krp_next); 1415 goto out; 1416 } 1417 1418 crypto_driver_unlock(cap); 1419 result = crypto_kinvoke(krp, 0); 1420 KASSERTMSG(result == 0 || result == ERESTART, "result=%d", result); 1421 if (result == ERESTART) { 1422 /* 1423 * The driver ran out of resources, mark the 1424 * driver ``blocked'' for cryptop's and put 1425 * the op on the queue. 1426 */ 1427 crypto_driver_lock(cap); 1428 cap->cc_kqblocked = 1; 1429 crypto_driver_unlock(cap); 1430 TAILQ_INSERT_HEAD(crp_kq, krp, krp_next); 1431 cryptostats.cs_kblocks++; 1432 } 1433 1434 out: 1435 crypto_put_crp_qs(&s); 1436 return 0; 1437 } 1438 1439 /* 1440 * Dispatch an asymmetric crypto request to the appropriate crypto devices. 1441 */ 1442 static int 1443 crypto_kinvoke(struct cryptkop *krp, int hint) 1444 { 1445 struct cryptocap *cap = NULL; 1446 u_int32_t hid; 1447 int error; 1448 1449 KASSERT(krp != NULL); 1450 KASSERT(krp->krp_callback != NULL); 1451 KASSERT(!cpu_intr_p()); 1452 1453 mutex_enter(&crypto_drv_mtx); 1454 for (hid = 0; hid < crypto_drivers_num; hid++) { 1455 cap = crypto_checkdriver(hid); 1456 if (cap == NULL) 1457 continue; 1458 crypto_driver_lock(cap); 1459 if ((cap->cc_flags & CRYPTOCAP_F_SOFTWARE) && 1460 crypto_devallowsoft == 0) { 1461 crypto_driver_unlock(cap); 1462 continue; 1463 } 1464 if (cap->cc_kprocess == NULL) { 1465 crypto_driver_unlock(cap); 1466 continue; 1467 } 1468 if ((cap->cc_kalg[krp->krp_op] & 1469 CRYPTO_ALG_FLAG_SUPPORTED) == 0) { 1470 crypto_driver_unlock(cap); 1471 continue; 1472 } 1473 break; 1474 } 1475 mutex_exit(&crypto_drv_mtx); 1476 if (cap != NULL) { 1477 int (*process)(void *, struct cryptkop *, int); 1478 void *arg; 1479 1480 process = cap->cc_kprocess; 1481 arg = cap->cc_karg; 1482 krp->krp_hid = hid; 1483 krp->reqcpu = curcpu(); 1484 crypto_driver_unlock(cap); 1485 error = (*process)(arg, krp, hint); 1486 KASSERTMSG(error == 0 || error == ERESTART, "error=%d", 1487 error); 1488 return error; 1489 } else { 1490 krp->krp_status = ENODEV; 1491 crypto_kdone(krp); 1492 return 0; 1493 } 1494 } 1495 1496 #ifdef CRYPTO_TIMING 1497 static void 1498 crypto_tstat(struct cryptotstat *ts, struct timespec *tv) 1499 { 1500 struct timespec now, t; 1501 1502 nanouptime(&now); 1503 t.tv_sec = now.tv_sec - tv->tv_sec; 1504 t.tv_nsec = now.tv_nsec - tv->tv_nsec; 1505 if (t.tv_nsec < 0) { 1506 t.tv_sec--; 1507 t.tv_nsec += 1000000000; 1508 } 1509 timespecadd(&ts->acc, &t, &t); 1510 if (timespeccmp(&t, &ts->min, <)) 1511 ts->min = t; 1512 if (timespeccmp(&t, &ts->max, >)) 1513 ts->max = t; 1514 ts->count++; 1515 1516 *tv = now; 1517 } 1518 #endif 1519 1520 /* 1521 * Dispatch a crypto request to the appropriate crypto devices. 1522 */ 1523 static int 1524 crypto_invoke(struct cryptop *crp, int hint) 1525 { 1526 struct cryptocap *cap; 1527 int error; 1528 1529 KASSERT(crp != NULL); 1530 KASSERT(crp->crp_callback != NULL); 1531 KASSERT(crp->crp_desc != NULL); 1532 KASSERT(!cpu_intr_p()); 1533 1534 #ifdef CRYPTO_TIMING 1535 if (crypto_timing) 1536 crypto_tstat(&cryptostats.cs_invoke, &crp->crp_tstamp); 1537 #endif 1538 1539 cap = crypto_checkdriver_lock(CRYPTO_SESID2HID(crp->crp_sid)); 1540 if (cap != NULL && (cap->cc_flags & CRYPTOCAP_F_CLEANUP) == 0) { 1541 int (*process)(void *, struct cryptop *, int); 1542 void *arg; 1543 1544 process = cap->cc_process; 1545 arg = cap->cc_arg; 1546 crp->reqcpu = curcpu(); 1547 1548 /* 1549 * Invoke the driver to process the request. 1550 */ 1551 DPRINTF("calling process for %p\n", crp); 1552 crypto_driver_unlock(cap); 1553 error = (*process)(arg, crp, hint); 1554 KASSERTMSG(error == 0 || error == ERESTART, "error=%d", 1555 error); 1556 return error; 1557 } else { 1558 if (cap != NULL) { 1559 crypto_driver_unlock(cap); 1560 crypto_freesession(crp->crp_sid); 1561 } 1562 crp->crp_etype = ENODEV; 1563 crypto_done(crp); 1564 return 0; 1565 } 1566 } 1567 1568 /* 1569 * Release a set of crypto descriptors. 1570 */ 1571 void 1572 crypto_freereq(struct cryptop *crp) 1573 { 1574 struct cryptodesc *crd; 1575 1576 if (crp == NULL) 1577 return; 1578 DPRINTF("lid[%u]: crp %p\n", CRYPTO_SESID2LID(crp->crp_sid), crp); 1579 1580 /* sanity check */ 1581 if (crp->crp_flags & CRYPTO_F_ONRETQ) { 1582 panic("crypto_freereq() freeing crp on RETQ\n"); 1583 } 1584 1585 while ((crd = crp->crp_desc) != NULL) { 1586 crp->crp_desc = crd->crd_next; 1587 pool_cache_put(cryptodesc_cache, crd); 1588 } 1589 pool_cache_put(cryptop_cache, crp); 1590 } 1591 1592 /* 1593 * Acquire a set of crypto descriptors. 1594 */ 1595 struct cryptop * 1596 crypto_getreq(int num) 1597 { 1598 struct cryptodesc *crd; 1599 struct cryptop *crp; 1600 struct crypto_crp_ret_qs *qs; 1601 1602 KASSERT(num > 0); 1603 1604 /* 1605 * When crp_ret_q is full, we restrict here to avoid crp_ret_q overflow 1606 * by error callback. 1607 */ 1608 qs = crypto_get_crp_ret_qs(curcpu()); 1609 if (qs->crp_ret_q_maxlen > 0 1610 && qs->crp_ret_q_len > qs->crp_ret_q_maxlen) { 1611 qs->crp_ret_q_drops++; 1612 crypto_put_crp_ret_qs(curcpu()); 1613 return NULL; 1614 } 1615 crypto_put_crp_ret_qs(curcpu()); 1616 1617 crp = pool_cache_get(cryptop_cache, PR_NOWAIT); 1618 if (crp == NULL) { 1619 return NULL; 1620 } 1621 memset(crp, 0, sizeof(struct cryptop)); 1622 1623 while (num--) { 1624 crd = pool_cache_get(cryptodesc_cache, PR_NOWAIT); 1625 if (crd == NULL) { 1626 crypto_freereq(crp); 1627 return NULL; 1628 } 1629 1630 memset(crd, 0, sizeof(struct cryptodesc)); 1631 crd->crd_next = crp->crp_desc; 1632 crp->crp_desc = crd; 1633 } 1634 1635 return crp; 1636 } 1637 1638 /* 1639 * Release a set of asymmetric crypto descriptors. 1640 * Currently, support one descriptor only. 1641 */ 1642 void 1643 crypto_kfreereq(struct cryptkop *krp) 1644 { 1645 1646 if (krp == NULL) 1647 return; 1648 1649 DPRINTF("krp %p\n", krp); 1650 1651 /* sanity check */ 1652 if (krp->krp_flags & CRYPTO_F_ONRETQ) { 1653 panic("crypto_kfreereq() freeing krp on RETQ\n"); 1654 } 1655 1656 pool_cache_put(cryptkop_cache, krp); 1657 } 1658 1659 /* 1660 * Acquire a set of asymmetric crypto descriptors. 1661 * Currently, support one descriptor only. 1662 */ 1663 struct cryptkop * 1664 crypto_kgetreq(int num __diagused, int prflags) 1665 { 1666 struct cryptkop *krp; 1667 struct crypto_crp_ret_qs *qs; 1668 1669 KASSERTMSG(num == 1, "num=%d not supported", num); 1670 1671 /* 1672 * When crp_ret_kq is full, we restrict here to avoid crp_ret_kq 1673 * overflow by error callback. 1674 */ 1675 qs = crypto_get_crp_ret_qs(curcpu()); 1676 if (qs->crp_ret_kq_maxlen > 0 1677 && qs->crp_ret_kq_len > qs->crp_ret_kq_maxlen) { 1678 qs->crp_ret_kq_drops++; 1679 crypto_put_crp_ret_qs(curcpu()); 1680 return NULL; 1681 } 1682 crypto_put_crp_ret_qs(curcpu()); 1683 1684 krp = pool_cache_get(cryptkop_cache, prflags); 1685 if (krp == NULL) { 1686 return NULL; 1687 } 1688 memset(krp, 0, sizeof(struct cryptkop)); 1689 1690 return krp; 1691 } 1692 1693 /* 1694 * Invoke the callback on behalf of the driver. 1695 */ 1696 void 1697 crypto_done(struct cryptop *crp) 1698 { 1699 int wasempty; 1700 struct crypto_crp_ret_qs *qs; 1701 struct crypto_crp_ret_q *crp_ret_q; 1702 1703 KASSERT(crp != NULL); 1704 1705 if (crp->crp_etype != 0) 1706 cryptostats.cs_errs++; 1707 #ifdef CRYPTO_TIMING 1708 if (crypto_timing) 1709 crypto_tstat(&cryptostats.cs_done, &crp->crp_tstamp); 1710 #endif 1711 DPRINTF("lid[%u]: crp %p\n", CRYPTO_SESID2LID(crp->crp_sid), crp); 1712 1713 qs = crypto_get_crp_ret_qs(crp->reqcpu); 1714 crp_ret_q = &qs->crp_ret_q; 1715 wasempty = TAILQ_EMPTY(crp_ret_q); 1716 DPRINTF("lid[%u]: queueing %p\n", CRYPTO_SESID2LID(crp->crp_sid), crp); 1717 crp->crp_flags |= CRYPTO_F_ONRETQ; 1718 TAILQ_INSERT_TAIL(crp_ret_q, crp, crp_next); 1719 qs->crp_ret_q_len++; 1720 if (wasempty && !qs->crp_ret_q_exit_flag) { 1721 DPRINTF("lid[%u]: waking cryptoret, crp %p hit empty queue\n.", 1722 CRYPTO_SESID2LID(crp->crp_sid), crp); 1723 softint_schedule_cpu(crypto_ret_si, crp->reqcpu); 1724 } 1725 crypto_put_crp_ret_qs(crp->reqcpu); 1726 } 1727 1728 /* 1729 * Invoke the callback on behalf of the driver. 1730 */ 1731 void 1732 crypto_kdone(struct cryptkop *krp) 1733 { 1734 int wasempty; 1735 struct crypto_crp_ret_qs *qs; 1736 struct crypto_crp_ret_kq *crp_ret_kq; 1737 1738 KASSERT(krp != NULL); 1739 1740 if (krp->krp_status != 0) 1741 cryptostats.cs_kerrs++; 1742 1743 qs = crypto_get_crp_ret_qs(krp->reqcpu); 1744 crp_ret_kq = &qs->crp_ret_kq; 1745 1746 wasempty = TAILQ_EMPTY(crp_ret_kq); 1747 krp->krp_flags |= CRYPTO_F_ONRETQ; 1748 TAILQ_INSERT_TAIL(crp_ret_kq, krp, krp_next); 1749 qs->crp_ret_kq_len++; 1750 if (wasempty && !qs->crp_ret_q_exit_flag) 1751 softint_schedule_cpu(crypto_ret_si, krp->reqcpu); 1752 crypto_put_crp_ret_qs(krp->reqcpu); 1753 } 1754 1755 int 1756 crypto_getfeat(int *featp) 1757 { 1758 1759 if (crypto_userasymcrypto == 0) { 1760 *featp = 0; 1761 return 0; 1762 } 1763 1764 mutex_enter(&crypto_drv_mtx); 1765 1766 int feat = 0; 1767 for (int hid = 0; hid < crypto_drivers_num; hid++) { 1768 struct cryptocap *cap; 1769 cap = crypto_checkdriver(hid); 1770 if (cap == NULL) 1771 continue; 1772 1773 crypto_driver_lock(cap); 1774 1775 if ((cap->cc_flags & CRYPTOCAP_F_SOFTWARE) && 1776 crypto_devallowsoft == 0) 1777 goto unlock; 1778 1779 if (cap->cc_kprocess == NULL) 1780 goto unlock; 1781 1782 for (int kalg = 0; kalg < CRK_ALGORITHM_MAX; kalg++) 1783 if ((cap->cc_kalg[kalg] & 1784 CRYPTO_ALG_FLAG_SUPPORTED) != 0) 1785 feat |= 1 << kalg; 1786 1787 unlock: crypto_driver_unlock(cap); 1788 } 1789 1790 mutex_exit(&crypto_drv_mtx); 1791 *featp = feat; 1792 return (0); 1793 } 1794 1795 /* 1796 * Software interrupt thread to dispatch crypto requests. 1797 */ 1798 static void 1799 cryptointr(void *arg __unused) 1800 { 1801 struct cryptop *crp, *submit, *cnext; 1802 struct cryptkop *krp, *knext; 1803 struct cryptocap *cap; 1804 struct crypto_crp_qs *crp_qs; 1805 struct crypto_crp_q *crp_q; 1806 struct crypto_crp_kq *crp_kq; 1807 int result, hint, s; 1808 1809 cryptostats.cs_intrs++; 1810 crp_qs = crypto_get_crp_qs(&s); 1811 crp_q = crp_qs->crp_q; 1812 crp_kq = crp_qs->crp_kq; 1813 do { 1814 /* 1815 * Find the first element in the queue that can be 1816 * processed and look-ahead to see if multiple ops 1817 * are ready for the same driver. 1818 */ 1819 submit = NULL; 1820 hint = 0; 1821 TAILQ_FOREACH_SAFE(crp, crp_q, crp_next, cnext) { 1822 u_int32_t hid = CRYPTO_SESID2HID(crp->crp_sid); 1823 cap = crypto_checkdriver_lock(hid); 1824 if (cap == NULL || cap->cc_process == NULL) { 1825 if (cap != NULL) 1826 crypto_driver_unlock(cap); 1827 /* Op needs to be migrated, process it. */ 1828 submit = crp; 1829 break; 1830 } 1831 1832 /* 1833 * skip blocked crp regardless of CRYPTO_F_BATCH 1834 */ 1835 if (cap->cc_qblocked != 0) { 1836 crypto_driver_unlock(cap); 1837 continue; 1838 } 1839 crypto_driver_unlock(cap); 1840 1841 /* 1842 * skip batch crp until the end of crp_q 1843 */ 1844 if ((crp->crp_flags & CRYPTO_F_BATCH) != 0) { 1845 if (submit == NULL) { 1846 submit = crp; 1847 } else { 1848 if (CRYPTO_SESID2HID(submit->crp_sid) 1849 == hid) 1850 hint = CRYPTO_HINT_MORE; 1851 } 1852 1853 continue; 1854 } 1855 1856 /* 1857 * found first crp which is neither blocked nor batch. 1858 */ 1859 submit = crp; 1860 /* 1861 * batch crp can be processed much later, so clear hint. 1862 */ 1863 hint = 0; 1864 break; 1865 } 1866 if (submit != NULL) { 1867 TAILQ_REMOVE(crp_q, submit, crp_next); 1868 result = crypto_invoke(submit, hint); 1869 KASSERTMSG(result == 0 || result == ERESTART, 1870 "result=%d", result); 1871 /* we must take here as the TAILQ op or kinvoke 1872 may need this mutex below. sigh. */ 1873 if (result == ERESTART) { 1874 /* 1875 * The driver ran out of resources, mark the 1876 * driver ``blocked'' for cryptop's and put 1877 * the request back in the queue. It would 1878 * best to put the request back where we got 1879 * it but that's hard so for now we put it 1880 * at the front. This should be ok; putting 1881 * it at the end does not work. 1882 */ 1883 /* validate sid again */ 1884 cap = crypto_checkdriver_lock(CRYPTO_SESID2HID(submit->crp_sid)); 1885 if (cap == NULL) { 1886 /* migrate again, sigh... */ 1887 TAILQ_INSERT_TAIL(crp_q, submit, crp_next); 1888 } else { 1889 cap->cc_qblocked = 1; 1890 crypto_driver_unlock(cap); 1891 TAILQ_INSERT_HEAD(crp_q, submit, crp_next); 1892 cryptostats.cs_blocks++; 1893 } 1894 } 1895 } 1896 1897 /* As above, but for key ops */ 1898 TAILQ_FOREACH_SAFE(krp, crp_kq, krp_next, knext) { 1899 cap = crypto_checkdriver_lock(krp->krp_hid); 1900 if (cap == NULL || cap->cc_kprocess == NULL) { 1901 if (cap != NULL) 1902 crypto_driver_unlock(cap); 1903 /* Op needs to be migrated, process it. */ 1904 break; 1905 } 1906 if (!cap->cc_kqblocked) { 1907 crypto_driver_unlock(cap); 1908 break; 1909 } 1910 crypto_driver_unlock(cap); 1911 } 1912 if (krp != NULL) { 1913 TAILQ_REMOVE(crp_kq, krp, krp_next); 1914 result = crypto_kinvoke(krp, 0); 1915 KASSERTMSG(result == 0 || result == ERESTART, 1916 "result=%d", result); 1917 /* the next iteration will want the mutex. :-/ */ 1918 if (result == ERESTART) { 1919 /* 1920 * The driver ran out of resources, mark the 1921 * driver ``blocked'' for cryptkop's and put 1922 * the request back in the queue. It would 1923 * best to put the request back where we got 1924 * it but that's hard so for now we put it 1925 * at the front. This should be ok; putting 1926 * it at the end does not work. 1927 */ 1928 /* validate sid again */ 1929 cap = crypto_checkdriver_lock(krp->krp_hid); 1930 if (cap == NULL) { 1931 /* migrate again, sigh... */ 1932 TAILQ_INSERT_TAIL(crp_kq, krp, krp_next); 1933 } else { 1934 cap->cc_kqblocked = 1; 1935 crypto_driver_unlock(cap); 1936 TAILQ_INSERT_HEAD(crp_kq, krp, krp_next); 1937 cryptostats.cs_kblocks++; 1938 } 1939 } 1940 } 1941 } while (submit != NULL || krp != NULL); 1942 crypto_put_crp_qs(&s); 1943 } 1944 1945 /* 1946 * softint handler to do callbacks. 1947 */ 1948 static void 1949 cryptoret_softint(void *arg __unused) 1950 { 1951 struct crypto_crp_ret_qs *qs; 1952 struct crypto_crp_ret_q *crp_ret_q; 1953 struct crypto_crp_ret_kq *crp_ret_kq; 1954 1955 qs = crypto_get_crp_ret_qs(curcpu()); 1956 crp_ret_q = &qs->crp_ret_q; 1957 crp_ret_kq = &qs->crp_ret_kq; 1958 for (;;) { 1959 struct cryptop *crp; 1960 struct cryptkop *krp; 1961 1962 crp = TAILQ_FIRST(crp_ret_q); 1963 if (crp != NULL) { 1964 TAILQ_REMOVE(crp_ret_q, crp, crp_next); 1965 qs->crp_ret_q_len--; 1966 crp->crp_flags &= ~CRYPTO_F_ONRETQ; 1967 } 1968 krp = TAILQ_FIRST(crp_ret_kq); 1969 if (krp != NULL) { 1970 TAILQ_REMOVE(crp_ret_kq, krp, krp_next); 1971 qs->crp_ret_q_len--; 1972 krp->krp_flags &= ~CRYPTO_F_ONRETQ; 1973 } 1974 1975 /* drop before calling any callbacks. */ 1976 if (crp == NULL && krp == NULL) 1977 break; 1978 1979 mutex_spin_exit(&qs->crp_ret_q_mtx); 1980 if (crp != NULL) { 1981 #ifdef CRYPTO_TIMING 1982 if (crypto_timing) { 1983 /* 1984 * NB: We must copy the timestamp before 1985 * doing the callback as the cryptop is 1986 * likely to be reclaimed. 1987 */ 1988 struct timespec t = crp->crp_tstamp; 1989 crypto_tstat(&cryptostats.cs_cb, &t); 1990 crp->crp_callback(crp); 1991 crypto_tstat(&cryptostats.cs_finis, &t); 1992 } else 1993 #endif 1994 { 1995 crp->crp_callback(crp); 1996 } 1997 } 1998 if (krp != NULL) 1999 krp->krp_callback(krp); 2000 2001 mutex_spin_enter(&qs->crp_ret_q_mtx); 2002 } 2003 crypto_put_crp_ret_qs(curcpu()); 2004 } 2005 2006 /* NetBSD module interface */ 2007 2008 MODULE(MODULE_CLASS_MISC, opencrypto, NULL); 2009 2010 static int 2011 opencrypto_modcmd(modcmd_t cmd, void *opaque) 2012 { 2013 int error = 0; 2014 2015 switch (cmd) { 2016 case MODULE_CMD_INIT: 2017 #ifdef _MODULE 2018 error = crypto_init(); 2019 #endif 2020 break; 2021 case MODULE_CMD_FINI: 2022 #ifdef _MODULE 2023 error = crypto_destroy(true); 2024 #endif 2025 break; 2026 default: 2027 error = ENOTTY; 2028 } 2029 return error; 2030 } 2031
Indexes created Tue Oct 21 16:10:11 GMT 2025