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1 | // SPDX-License-Identifier: GPL-2.0-or-later | |
2 | /* | |
3 | * Software async crypto daemon. | |
4 | * | |
5 | * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au> | |
6 | * | |
7 | * Added AEAD support to cryptd. | |
8 | * Authors: Tadeusz Struk (tadeusz.struk@intel.com) | |
9 | * Adrian Hoban <adrian.hoban@intel.com> | |
10 | * Gabriele Paoloni <gabriele.paoloni@intel.com> | |
11 | * Aidan O'Mahony (aidan.o.mahony@intel.com) | |
12 | * Copyright (c) 2010, Intel Corporation. | |
13 | */ | |
14 | ||
15 | #include <crypto/internal/hash.h> | |
16 | #include <crypto/internal/aead.h> | |
17 | #include <crypto/internal/skcipher.h> | |
18 | #include <crypto/cryptd.h> | |
19 | #include <linux/refcount.h> | |
20 | #include <linux/err.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/kernel.h> | |
23 | #include <linux/list.h> | |
24 | #include <linux/module.h> | |
25 | #include <linux/scatterlist.h> | |
26 | #include <linux/sched.h> | |
27 | #include <linux/slab.h> | |
28 | #include <linux/workqueue.h> | |
29 | ||
30 | static unsigned int cryptd_max_cpu_qlen = 1000; | |
31 | module_param(cryptd_max_cpu_qlen, uint, 0); | |
32 | MODULE_PARM_DESC(cryptd_max_cpu_qlen, "Set cryptd Max queue depth"); | |
33 | ||
34 | static struct workqueue_struct *cryptd_wq; | |
35 | ||
36 | struct cryptd_cpu_queue { | |
37 | struct crypto_queue queue; | |
38 | struct work_struct work; | |
39 | }; | |
40 | ||
41 | struct cryptd_queue { | |
42 | struct cryptd_cpu_queue __percpu *cpu_queue; | |
43 | }; | |
44 | ||
45 | struct cryptd_instance_ctx { | |
46 | struct crypto_spawn spawn; | |
47 | struct cryptd_queue *queue; | |
48 | }; | |
49 | ||
50 | struct skcipherd_instance_ctx { | |
51 | struct crypto_skcipher_spawn spawn; | |
52 | struct cryptd_queue *queue; | |
53 | }; | |
54 | ||
55 | struct hashd_instance_ctx { | |
56 | struct crypto_shash_spawn spawn; | |
57 | struct cryptd_queue *queue; | |
58 | }; | |
59 | ||
60 | struct aead_instance_ctx { | |
61 | struct crypto_aead_spawn aead_spawn; | |
62 | struct cryptd_queue *queue; | |
63 | }; | |
64 | ||
65 | struct cryptd_skcipher_ctx { | |
66 | refcount_t refcnt; | |
67 | struct crypto_sync_skcipher *child; | |
68 | }; | |
69 | ||
70 | struct cryptd_skcipher_request_ctx { | |
71 | crypto_completion_t complete; | |
72 | }; | |
73 | ||
74 | struct cryptd_hash_ctx { | |
75 | refcount_t refcnt; | |
76 | struct crypto_shash *child; | |
77 | }; | |
78 | ||
79 | struct cryptd_hash_request_ctx { | |
80 | crypto_completion_t complete; | |
81 | struct shash_desc desc; | |
82 | }; | |
83 | ||
84 | struct cryptd_aead_ctx { | |
85 | refcount_t refcnt; | |
86 | struct crypto_aead *child; | |
87 | }; | |
88 | ||
89 | struct cryptd_aead_request_ctx { | |
90 | crypto_completion_t complete; | |
91 | }; | |
92 | ||
93 | static void cryptd_queue_worker(struct work_struct *work); | |
94 | ||
95 | static int cryptd_init_queue(struct cryptd_queue *queue, | |
96 | unsigned int max_cpu_qlen) | |
97 | { | |
98 | int cpu; | |
99 | struct cryptd_cpu_queue *cpu_queue; | |
100 | ||
101 | queue->cpu_queue = alloc_percpu(struct cryptd_cpu_queue); | |
102 | if (!queue->cpu_queue) | |
103 | return -ENOMEM; | |
104 | for_each_possible_cpu(cpu) { | |
105 | cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu); | |
106 | crypto_init_queue(&cpu_queue->queue, max_cpu_qlen); | |
107 | INIT_WORK(&cpu_queue->work, cryptd_queue_worker); | |
108 | } | |
109 | pr_info("cryptd: max_cpu_qlen set to %d\n", max_cpu_qlen); | |
110 | return 0; | |
111 | } | |
112 | ||
113 | static void cryptd_fini_queue(struct cryptd_queue *queue) | |
114 | { | |
115 | int cpu; | |
116 | struct cryptd_cpu_queue *cpu_queue; | |
117 | ||
118 | for_each_possible_cpu(cpu) { | |
119 | cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu); | |
120 | BUG_ON(cpu_queue->queue.qlen); | |
121 | } | |
122 | free_percpu(queue->cpu_queue); | |
123 | } | |
124 | ||
125 | static int cryptd_enqueue_request(struct cryptd_queue *queue, | |
126 | struct crypto_async_request *request) | |
127 | { | |
128 | int cpu, err; | |
129 | struct cryptd_cpu_queue *cpu_queue; | |
130 | refcount_t *refcnt; | |
131 | ||
132 | cpu = get_cpu(); | |
133 | cpu_queue = this_cpu_ptr(queue->cpu_queue); | |
134 | err = crypto_enqueue_request(&cpu_queue->queue, request); | |
135 | ||
136 | refcnt = crypto_tfm_ctx(request->tfm); | |
137 | ||
138 | if (err == -ENOSPC) | |
139 | goto out_put_cpu; | |
140 | ||
141 | queue_work_on(cpu, cryptd_wq, &cpu_queue->work); | |
142 | ||
143 | if (!refcount_read(refcnt)) | |
144 | goto out_put_cpu; | |
145 | ||
146 | refcount_inc(refcnt); | |
147 | ||
148 | out_put_cpu: | |
149 | put_cpu(); | |
150 | ||
151 | return err; | |
152 | } | |
153 | ||
154 | /* Called in workqueue context, do one real cryption work (via | |
155 | * req->complete) and reschedule itself if there are more work to | |
156 | * do. */ | |
157 | static void cryptd_queue_worker(struct work_struct *work) | |
158 | { | |
159 | struct cryptd_cpu_queue *cpu_queue; | |
160 | struct crypto_async_request *req, *backlog; | |
161 | ||
162 | cpu_queue = container_of(work, struct cryptd_cpu_queue, work); | |
163 | /* | |
164 | * Only handle one request at a time to avoid hogging crypto workqueue. | |
165 | * preempt_disable/enable is used to prevent being preempted by | |
166 | * cryptd_enqueue_request(). local_bh_disable/enable is used to prevent | |
167 | * cryptd_enqueue_request() being accessed from software interrupts. | |
168 | */ | |
169 | local_bh_disable(); | |
170 | preempt_disable(); | |
171 | backlog = crypto_get_backlog(&cpu_queue->queue); | |
172 | req = crypto_dequeue_request(&cpu_queue->queue); | |
173 | preempt_enable(); | |
174 | local_bh_enable(); | |
175 | ||
176 | if (!req) | |
177 | return; | |
178 | ||
179 | if (backlog) | |
180 | backlog->complete(backlog, -EINPROGRESS); | |
181 | req->complete(req, 0); | |
182 | ||
183 | if (cpu_queue->queue.qlen) | |
184 | queue_work(cryptd_wq, &cpu_queue->work); | |
185 | } | |
186 | ||
187 | static inline struct cryptd_queue *cryptd_get_queue(struct crypto_tfm *tfm) | |
188 | { | |
189 | struct crypto_instance *inst = crypto_tfm_alg_instance(tfm); | |
190 | struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst); | |
191 | return ictx->queue; | |
192 | } | |
193 | ||
194 | static void cryptd_type_and_mask(struct crypto_attr_type *algt, | |
195 | u32 *type, u32 *mask) | |
196 | { | |
197 | /* | |
198 | * cryptd is allowed to wrap internal algorithms, but in that case the | |
199 | * resulting cryptd instance will be marked as internal as well. | |
200 | */ | |
201 | *type = algt->type & CRYPTO_ALG_INTERNAL; | |
202 | *mask = algt->mask & CRYPTO_ALG_INTERNAL; | |
203 | ||
204 | /* No point in cryptd wrapping an algorithm that's already async. */ | |
205 | *mask |= CRYPTO_ALG_ASYNC; | |
206 | ||
207 | *mask |= crypto_algt_inherited_mask(algt); | |
208 | } | |
209 | ||
210 | static int cryptd_init_instance(struct crypto_instance *inst, | |
211 | struct crypto_alg *alg) | |
212 | { | |
213 | if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME, | |
214 | "cryptd(%s)", | |
215 | alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME) | |
216 | return -ENAMETOOLONG; | |
217 | ||
218 | memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME); | |
219 | ||
220 | inst->alg.cra_priority = alg->cra_priority + 50; | |
221 | inst->alg.cra_blocksize = alg->cra_blocksize; | |
222 | inst->alg.cra_alignmask = alg->cra_alignmask; | |
223 | ||
224 | return 0; | |
225 | } | |
226 | ||
227 | static int cryptd_skcipher_setkey(struct crypto_skcipher *parent, | |
228 | const u8 *key, unsigned int keylen) | |
229 | { | |
230 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(parent); | |
231 | struct crypto_sync_skcipher *child = ctx->child; | |
232 | ||
233 | crypto_sync_skcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK); | |
234 | crypto_sync_skcipher_set_flags(child, | |
235 | crypto_skcipher_get_flags(parent) & | |
236 | CRYPTO_TFM_REQ_MASK); | |
237 | return crypto_sync_skcipher_setkey(child, key, keylen); | |
238 | } | |
239 | ||
240 | static void cryptd_skcipher_complete(struct skcipher_request *req, int err) | |
241 | { | |
242 | struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); | |
243 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm); | |
244 | struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req); | |
245 | int refcnt = refcount_read(&ctx->refcnt); | |
246 | ||
247 | local_bh_disable(); | |
248 | rctx->complete(&req->base, err); | |
249 | local_bh_enable(); | |
250 | ||
251 | if (err != -EINPROGRESS && refcnt && refcount_dec_and_test(&ctx->refcnt)) | |
252 | crypto_free_skcipher(tfm); | |
253 | } | |
254 | ||
255 | static void cryptd_skcipher_encrypt(struct crypto_async_request *base, | |
256 | int err) | |
257 | { | |
258 | struct skcipher_request *req = skcipher_request_cast(base); | |
259 | struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req); | |
260 | struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); | |
261 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm); | |
262 | struct crypto_sync_skcipher *child = ctx->child; | |
263 | SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, child); | |
264 | ||
265 | if (unlikely(err == -EINPROGRESS)) | |
266 | goto out; | |
267 | ||
268 | skcipher_request_set_sync_tfm(subreq, child); | |
269 | skcipher_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP, | |
270 | NULL, NULL); | |
271 | skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen, | |
272 | req->iv); | |
273 | ||
274 | err = crypto_skcipher_encrypt(subreq); | |
275 | skcipher_request_zero(subreq); | |
276 | ||
277 | req->base.complete = rctx->complete; | |
278 | ||
279 | out: | |
280 | cryptd_skcipher_complete(req, err); | |
281 | } | |
282 | ||
283 | static void cryptd_skcipher_decrypt(struct crypto_async_request *base, | |
284 | int err) | |
285 | { | |
286 | struct skcipher_request *req = skcipher_request_cast(base); | |
287 | struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req); | |
288 | struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); | |
289 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm); | |
290 | struct crypto_sync_skcipher *child = ctx->child; | |
291 | SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, child); | |
292 | ||
293 | if (unlikely(err == -EINPROGRESS)) | |
294 | goto out; | |
295 | ||
296 | skcipher_request_set_sync_tfm(subreq, child); | |
297 | skcipher_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP, | |
298 | NULL, NULL); | |
299 | skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen, | |
300 | req->iv); | |
301 | ||
302 | err = crypto_skcipher_decrypt(subreq); | |
303 | skcipher_request_zero(subreq); | |
304 | ||
305 | req->base.complete = rctx->complete; | |
306 | ||
307 | out: | |
308 | cryptd_skcipher_complete(req, err); | |
309 | } | |
310 | ||
311 | static int cryptd_skcipher_enqueue(struct skcipher_request *req, | |
312 | crypto_completion_t compl) | |
313 | { | |
314 | struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req); | |
315 | struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); | |
316 | struct cryptd_queue *queue; | |
317 | ||
318 | queue = cryptd_get_queue(crypto_skcipher_tfm(tfm)); | |
319 | rctx->complete = req->base.complete; | |
320 | req->base.complete = compl; | |
321 | ||
322 | return cryptd_enqueue_request(queue, &req->base); | |
323 | } | |
324 | ||
325 | static int cryptd_skcipher_encrypt_enqueue(struct skcipher_request *req) | |
326 | { | |
327 | return cryptd_skcipher_enqueue(req, cryptd_skcipher_encrypt); | |
328 | } | |
329 | ||
330 | static int cryptd_skcipher_decrypt_enqueue(struct skcipher_request *req) | |
331 | { | |
332 | return cryptd_skcipher_enqueue(req, cryptd_skcipher_decrypt); | |
333 | } | |
334 | ||
335 | static int cryptd_skcipher_init_tfm(struct crypto_skcipher *tfm) | |
336 | { | |
337 | struct skcipher_instance *inst = skcipher_alg_instance(tfm); | |
338 | struct skcipherd_instance_ctx *ictx = skcipher_instance_ctx(inst); | |
339 | struct crypto_skcipher_spawn *spawn = &ictx->spawn; | |
340 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm); | |
341 | struct crypto_skcipher *cipher; | |
342 | ||
343 | cipher = crypto_spawn_skcipher(spawn); | |
344 | if (IS_ERR(cipher)) | |
345 | return PTR_ERR(cipher); | |
346 | ||
347 | ctx->child = (struct crypto_sync_skcipher *)cipher; | |
348 | crypto_skcipher_set_reqsize( | |
349 | tfm, sizeof(struct cryptd_skcipher_request_ctx)); | |
350 | return 0; | |
351 | } | |
352 | ||
353 | static void cryptd_skcipher_exit_tfm(struct crypto_skcipher *tfm) | |
354 | { | |
355 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm); | |
356 | ||
357 | crypto_free_sync_skcipher(ctx->child); | |
358 | } | |
359 | ||
360 | static void cryptd_skcipher_free(struct skcipher_instance *inst) | |
361 | { | |
362 | struct skcipherd_instance_ctx *ctx = skcipher_instance_ctx(inst); | |
363 | ||
364 | crypto_drop_skcipher(&ctx->spawn); | |
365 | kfree(inst); | |
366 | } | |
367 | ||
368 | static int cryptd_create_skcipher(struct crypto_template *tmpl, | |
369 | struct rtattr **tb, | |
370 | struct crypto_attr_type *algt, | |
371 | struct cryptd_queue *queue) | |
372 | { | |
373 | struct skcipherd_instance_ctx *ctx; | |
374 | struct skcipher_instance *inst; | |
375 | struct skcipher_alg *alg; | |
376 | u32 type; | |
377 | u32 mask; | |
378 | int err; | |
379 | ||
380 | cryptd_type_and_mask(algt, &type, &mask); | |
381 | ||
382 | inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL); | |
383 | if (!inst) | |
384 | return -ENOMEM; | |
385 | ||
386 | ctx = skcipher_instance_ctx(inst); | |
387 | ctx->queue = queue; | |
388 | ||
389 | err = crypto_grab_skcipher(&ctx->spawn, skcipher_crypto_instance(inst), | |
390 | crypto_attr_alg_name(tb[1]), type, mask); | |
391 | if (err) | |
392 | goto err_free_inst; | |
393 | ||
394 | alg = crypto_spawn_skcipher_alg(&ctx->spawn); | |
395 | err = cryptd_init_instance(skcipher_crypto_instance(inst), &alg->base); | |
396 | if (err) | |
397 | goto err_free_inst; | |
398 | ||
399 | inst->alg.base.cra_flags |= CRYPTO_ALG_ASYNC | | |
400 | (alg->base.cra_flags & CRYPTO_ALG_INTERNAL); | |
401 | inst->alg.ivsize = crypto_skcipher_alg_ivsize(alg); | |
402 | inst->alg.chunksize = crypto_skcipher_alg_chunksize(alg); | |
403 | inst->alg.min_keysize = crypto_skcipher_alg_min_keysize(alg); | |
404 | inst->alg.max_keysize = crypto_skcipher_alg_max_keysize(alg); | |
405 | ||
406 | inst->alg.base.cra_ctxsize = sizeof(struct cryptd_skcipher_ctx); | |
407 | ||
408 | inst->alg.init = cryptd_skcipher_init_tfm; | |
409 | inst->alg.exit = cryptd_skcipher_exit_tfm; | |
410 | ||
411 | inst->alg.setkey = cryptd_skcipher_setkey; | |
412 | inst->alg.encrypt = cryptd_skcipher_encrypt_enqueue; | |
413 | inst->alg.decrypt = cryptd_skcipher_decrypt_enqueue; | |
414 | ||
415 | inst->free = cryptd_skcipher_free; | |
416 | ||
417 | err = skcipher_register_instance(tmpl, inst); | |
418 | if (err) { | |
419 | err_free_inst: | |
420 | cryptd_skcipher_free(inst); | |
421 | } | |
422 | return err; | |
423 | } | |
424 | ||
425 | static int cryptd_hash_init_tfm(struct crypto_tfm *tfm) | |
426 | { | |
427 | struct crypto_instance *inst = crypto_tfm_alg_instance(tfm); | |
428 | struct hashd_instance_ctx *ictx = crypto_instance_ctx(inst); | |
429 | struct crypto_shash_spawn *spawn = &ictx->spawn; | |
430 | struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm); | |
431 | struct crypto_shash *hash; | |
432 | ||
433 | hash = crypto_spawn_shash(spawn); | |
434 | if (IS_ERR(hash)) | |
435 | return PTR_ERR(hash); | |
436 | ||
437 | ctx->child = hash; | |
438 | crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm), | |
439 | sizeof(struct cryptd_hash_request_ctx) + | |
440 | crypto_shash_descsize(hash)); | |
441 | return 0; | |
442 | } | |
443 | ||
444 | static void cryptd_hash_exit_tfm(struct crypto_tfm *tfm) | |
445 | { | |
446 | struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm); | |
447 | ||
448 | crypto_free_shash(ctx->child); | |
449 | } | |
450 | ||
451 | static int cryptd_hash_setkey(struct crypto_ahash *parent, | |
452 | const u8 *key, unsigned int keylen) | |
453 | { | |
454 | struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(parent); | |
455 | struct crypto_shash *child = ctx->child; | |
456 | ||
457 | crypto_shash_clear_flags(child, CRYPTO_TFM_REQ_MASK); | |
458 | crypto_shash_set_flags(child, crypto_ahash_get_flags(parent) & | |
459 | CRYPTO_TFM_REQ_MASK); | |
460 | return crypto_shash_setkey(child, key, keylen); | |
461 | } | |
462 | ||
463 | static int cryptd_hash_enqueue(struct ahash_request *req, | |
464 | crypto_completion_t compl) | |
465 | { | |
466 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); | |
467 | struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); | |
468 | struct cryptd_queue *queue = | |
469 | cryptd_get_queue(crypto_ahash_tfm(tfm)); | |
470 | ||
471 | rctx->complete = req->base.complete; | |
472 | req->base.complete = compl; | |
473 | ||
474 | return cryptd_enqueue_request(queue, &req->base); | |
475 | } | |
476 | ||
477 | static void cryptd_hash_complete(struct ahash_request *req, int err) | |
478 | { | |
479 | struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); | |
480 | struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm); | |
481 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); | |
482 | int refcnt = refcount_read(&ctx->refcnt); | |
483 | ||
484 | local_bh_disable(); | |
485 | rctx->complete(&req->base, err); | |
486 | local_bh_enable(); | |
487 | ||
488 | if (err != -EINPROGRESS && refcnt && refcount_dec_and_test(&ctx->refcnt)) | |
489 | crypto_free_ahash(tfm); | |
490 | } | |
491 | ||
492 | static void cryptd_hash_init(struct crypto_async_request *req_async, int err) | |
493 | { | |
494 | struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm); | |
495 | struct crypto_shash *child = ctx->child; | |
496 | struct ahash_request *req = ahash_request_cast(req_async); | |
497 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); | |
498 | struct shash_desc *desc = &rctx->desc; | |
499 | ||
500 | if (unlikely(err == -EINPROGRESS)) | |
501 | goto out; | |
502 | ||
503 | desc->tfm = child; | |
504 | ||
505 | err = crypto_shash_init(desc); | |
506 | ||
507 | req->base.complete = rctx->complete; | |
508 | ||
509 | out: | |
510 | cryptd_hash_complete(req, err); | |
511 | } | |
512 | ||
513 | static int cryptd_hash_init_enqueue(struct ahash_request *req) | |
514 | { | |
515 | return cryptd_hash_enqueue(req, cryptd_hash_init); | |
516 | } | |
517 | ||
518 | static void cryptd_hash_update(struct crypto_async_request *req_async, int err) | |
519 | { | |
520 | struct ahash_request *req = ahash_request_cast(req_async); | |
521 | struct cryptd_hash_request_ctx *rctx; | |
522 | ||
523 | rctx = ahash_request_ctx(req); | |
524 | ||
525 | if (unlikely(err == -EINPROGRESS)) | |
526 | goto out; | |
527 | ||
528 | err = shash_ahash_update(req, &rctx->desc); | |
529 | ||
530 | req->base.complete = rctx->complete; | |
531 | ||
532 | out: | |
533 | cryptd_hash_complete(req, err); | |
534 | } | |
535 | ||
536 | static int cryptd_hash_update_enqueue(struct ahash_request *req) | |
537 | { | |
538 | return cryptd_hash_enqueue(req, cryptd_hash_update); | |
539 | } | |
540 | ||
541 | static void cryptd_hash_final(struct crypto_async_request *req_async, int err) | |
542 | { | |
543 | struct ahash_request *req = ahash_request_cast(req_async); | |
544 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); | |
545 | ||
546 | if (unlikely(err == -EINPROGRESS)) | |
547 | goto out; | |
548 | ||
549 | err = crypto_shash_final(&rctx->desc, req->result); | |
550 | ||
551 | req->base.complete = rctx->complete; | |
552 | ||
553 | out: | |
554 | cryptd_hash_complete(req, err); | |
555 | } | |
556 | ||
557 | static int cryptd_hash_final_enqueue(struct ahash_request *req) | |
558 | { | |
559 | return cryptd_hash_enqueue(req, cryptd_hash_final); | |
560 | } | |
561 | ||
562 | static void cryptd_hash_finup(struct crypto_async_request *req_async, int err) | |
563 | { | |
564 | struct ahash_request *req = ahash_request_cast(req_async); | |
565 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); | |
566 | ||
567 | if (unlikely(err == -EINPROGRESS)) | |
568 | goto out; | |
569 | ||
570 | err = shash_ahash_finup(req, &rctx->desc); | |
571 | ||
572 | req->base.complete = rctx->complete; | |
573 | ||
574 | out: | |
575 | cryptd_hash_complete(req, err); | |
576 | } | |
577 | ||
578 | static int cryptd_hash_finup_enqueue(struct ahash_request *req) | |
579 | { | |
580 | return cryptd_hash_enqueue(req, cryptd_hash_finup); | |
581 | } | |
582 | ||
583 | static void cryptd_hash_digest(struct crypto_async_request *req_async, int err) | |
584 | { | |
585 | struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm); | |
586 | struct crypto_shash *child = ctx->child; | |
587 | struct ahash_request *req = ahash_request_cast(req_async); | |
588 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); | |
589 | struct shash_desc *desc = &rctx->desc; | |
590 | ||
591 | if (unlikely(err == -EINPROGRESS)) | |
592 | goto out; | |
593 | ||
594 | desc->tfm = child; | |
595 | ||
596 | err = shash_ahash_digest(req, desc); | |
597 | ||
598 | req->base.complete = rctx->complete; | |
599 | ||
600 | out: | |
601 | cryptd_hash_complete(req, err); | |
602 | } | |
603 | ||
604 | static int cryptd_hash_digest_enqueue(struct ahash_request *req) | |
605 | { | |
606 | return cryptd_hash_enqueue(req, cryptd_hash_digest); | |
607 | } | |
608 | ||
609 | static int cryptd_hash_export(struct ahash_request *req, void *out) | |
610 | { | |
611 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); | |
612 | ||
613 | return crypto_shash_export(&rctx->desc, out); | |
614 | } | |
615 | ||
616 | static int cryptd_hash_import(struct ahash_request *req, const void *in) | |
617 | { | |
618 | struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); | |
619 | struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm); | |
620 | struct shash_desc *desc = cryptd_shash_desc(req); | |
621 | ||
622 | desc->tfm = ctx->child; | |
623 | ||
624 | return crypto_shash_import(desc, in); | |
625 | } | |
626 | ||
627 | static void cryptd_hash_free(struct ahash_instance *inst) | |
628 | { | |
629 | struct hashd_instance_ctx *ctx = ahash_instance_ctx(inst); | |
630 | ||
631 | crypto_drop_shash(&ctx->spawn); | |
632 | kfree(inst); | |
633 | } | |
634 | ||
635 | static int cryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb, | |
636 | struct crypto_attr_type *algt, | |
637 | struct cryptd_queue *queue) | |
638 | { | |
639 | struct hashd_instance_ctx *ctx; | |
640 | struct ahash_instance *inst; | |
641 | struct shash_alg *alg; | |
642 | u32 type; | |
643 | u32 mask; | |
644 | int err; | |
645 | ||
646 | cryptd_type_and_mask(algt, &type, &mask); | |
647 | ||
648 | inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL); | |
649 | if (!inst) | |
650 | return -ENOMEM; | |
651 | ||
652 | ctx = ahash_instance_ctx(inst); | |
653 | ctx->queue = queue; | |
654 | ||
655 | err = crypto_grab_shash(&ctx->spawn, ahash_crypto_instance(inst), | |
656 | crypto_attr_alg_name(tb[1]), type, mask); | |
657 | if (err) | |
658 | goto err_free_inst; | |
659 | alg = crypto_spawn_shash_alg(&ctx->spawn); | |
660 | ||
661 | err = cryptd_init_instance(ahash_crypto_instance(inst), &alg->base); | |
662 | if (err) | |
663 | goto err_free_inst; | |
664 | ||
665 | inst->alg.halg.base.cra_flags |= CRYPTO_ALG_ASYNC | | |
666 | (alg->base.cra_flags & (CRYPTO_ALG_INTERNAL| | |
667 | CRYPTO_ALG_OPTIONAL_KEY)); | |
668 | inst->alg.halg.digestsize = alg->digestsize; | |
669 | inst->alg.halg.statesize = alg->statesize; | |
670 | inst->alg.halg.base.cra_ctxsize = sizeof(struct cryptd_hash_ctx); | |
671 | ||
672 | inst->alg.halg.base.cra_init = cryptd_hash_init_tfm; | |
673 | inst->alg.halg.base.cra_exit = cryptd_hash_exit_tfm; | |
674 | ||
675 | inst->alg.init = cryptd_hash_init_enqueue; | |
676 | inst->alg.update = cryptd_hash_update_enqueue; | |
677 | inst->alg.final = cryptd_hash_final_enqueue; | |
678 | inst->alg.finup = cryptd_hash_finup_enqueue; | |
679 | inst->alg.export = cryptd_hash_export; | |
680 | inst->alg.import = cryptd_hash_import; | |
681 | if (crypto_shash_alg_has_setkey(alg)) | |
682 | inst->alg.setkey = cryptd_hash_setkey; | |
683 | inst->alg.digest = cryptd_hash_digest_enqueue; | |
684 | ||
685 | inst->free = cryptd_hash_free; | |
686 | ||
687 | err = ahash_register_instance(tmpl, inst); | |
688 | if (err) { | |
689 | err_free_inst: | |
690 | cryptd_hash_free(inst); | |
691 | } | |
692 | return err; | |
693 | } | |
694 | ||
695 | static int cryptd_aead_setkey(struct crypto_aead *parent, | |
696 | const u8 *key, unsigned int keylen) | |
697 | { | |
698 | struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent); | |
699 | struct crypto_aead *child = ctx->child; | |
700 | ||
701 | return crypto_aead_setkey(child, key, keylen); | |
702 | } | |
703 | ||
704 | static int cryptd_aead_setauthsize(struct crypto_aead *parent, | |
705 | unsigned int authsize) | |
706 | { | |
707 | struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent); | |
708 | struct crypto_aead *child = ctx->child; | |
709 | ||
710 | return crypto_aead_setauthsize(child, authsize); | |
711 | } | |
712 | ||
713 | static void cryptd_aead_crypt(struct aead_request *req, | |
714 | struct crypto_aead *child, | |
715 | int err, | |
716 | int (*crypt)(struct aead_request *req)) | |
717 | { | |
718 | struct cryptd_aead_request_ctx *rctx; | |
719 | struct cryptd_aead_ctx *ctx; | |
720 | crypto_completion_t compl; | |
721 | struct crypto_aead *tfm; | |
722 | int refcnt; | |
723 | ||
724 | rctx = aead_request_ctx(req); | |
725 | compl = rctx->complete; | |
726 | ||
727 | tfm = crypto_aead_reqtfm(req); | |
728 | ||
729 | if (unlikely(err == -EINPROGRESS)) | |
730 | goto out; | |
731 | aead_request_set_tfm(req, child); | |
732 | err = crypt( req ); | |
733 | ||
734 | out: | |
735 | ctx = crypto_aead_ctx(tfm); | |
736 | refcnt = refcount_read(&ctx->refcnt); | |
737 | ||
738 | local_bh_disable(); | |
739 | compl(&req->base, err); | |
740 | local_bh_enable(); | |
741 | ||
742 | if (err != -EINPROGRESS && refcnt && refcount_dec_and_test(&ctx->refcnt)) | |
743 | crypto_free_aead(tfm); | |
744 | } | |
745 | ||
746 | static void cryptd_aead_encrypt(struct crypto_async_request *areq, int err) | |
747 | { | |
748 | struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(areq->tfm); | |
749 | struct crypto_aead *child = ctx->child; | |
750 | struct aead_request *req; | |
751 | ||
752 | req = container_of(areq, struct aead_request, base); | |
753 | cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->encrypt); | |
754 | } | |
755 | ||
756 | static void cryptd_aead_decrypt(struct crypto_async_request *areq, int err) | |
757 | { | |
758 | struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(areq->tfm); | |
759 | struct crypto_aead *child = ctx->child; | |
760 | struct aead_request *req; | |
761 | ||
762 | req = container_of(areq, struct aead_request, base); | |
763 | cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->decrypt); | |
764 | } | |
765 | ||
766 | static int cryptd_aead_enqueue(struct aead_request *req, | |
767 | crypto_completion_t compl) | |
768 | { | |
769 | struct cryptd_aead_request_ctx *rctx = aead_request_ctx(req); | |
770 | struct crypto_aead *tfm = crypto_aead_reqtfm(req); | |
771 | struct cryptd_queue *queue = cryptd_get_queue(crypto_aead_tfm(tfm)); | |
772 | ||
773 | rctx->complete = req->base.complete; | |
774 | req->base.complete = compl; | |
775 | return cryptd_enqueue_request(queue, &req->base); | |
776 | } | |
777 | ||
778 | static int cryptd_aead_encrypt_enqueue(struct aead_request *req) | |
779 | { | |
780 | return cryptd_aead_enqueue(req, cryptd_aead_encrypt ); | |
781 | } | |
782 | ||
783 | static int cryptd_aead_decrypt_enqueue(struct aead_request *req) | |
784 | { | |
785 | return cryptd_aead_enqueue(req, cryptd_aead_decrypt ); | |
786 | } | |
787 | ||
788 | static int cryptd_aead_init_tfm(struct crypto_aead *tfm) | |
789 | { | |
790 | struct aead_instance *inst = aead_alg_instance(tfm); | |
791 | struct aead_instance_ctx *ictx = aead_instance_ctx(inst); | |
792 | struct crypto_aead_spawn *spawn = &ictx->aead_spawn; | |
793 | struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm); | |
794 | struct crypto_aead *cipher; | |
795 | ||
796 | cipher = crypto_spawn_aead(spawn); | |
797 | if (IS_ERR(cipher)) | |
798 | return PTR_ERR(cipher); | |
799 | ||
800 | ctx->child = cipher; | |
801 | crypto_aead_set_reqsize( | |
802 | tfm, max((unsigned)sizeof(struct cryptd_aead_request_ctx), | |
803 | crypto_aead_reqsize(cipher))); | |
804 | return 0; | |
805 | } | |
806 | ||
807 | static void cryptd_aead_exit_tfm(struct crypto_aead *tfm) | |
808 | { | |
809 | struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm); | |
810 | crypto_free_aead(ctx->child); | |
811 | } | |
812 | ||
813 | static void cryptd_aead_free(struct aead_instance *inst) | |
814 | { | |
815 | struct aead_instance_ctx *ctx = aead_instance_ctx(inst); | |
816 | ||
817 | crypto_drop_aead(&ctx->aead_spawn); | |
818 | kfree(inst); | |
819 | } | |
820 | ||
821 | static int cryptd_create_aead(struct crypto_template *tmpl, | |
822 | struct rtattr **tb, | |
823 | struct crypto_attr_type *algt, | |
824 | struct cryptd_queue *queue) | |
825 | { | |
826 | struct aead_instance_ctx *ctx; | |
827 | struct aead_instance *inst; | |
828 | struct aead_alg *alg; | |
829 | u32 type; | |
830 | u32 mask; | |
831 | int err; | |
832 | ||
833 | cryptd_type_and_mask(algt, &type, &mask); | |
834 | ||
835 | inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL); | |
836 | if (!inst) | |
837 | return -ENOMEM; | |
838 | ||
839 | ctx = aead_instance_ctx(inst); | |
840 | ctx->queue = queue; | |
841 | ||
842 | err = crypto_grab_aead(&ctx->aead_spawn, aead_crypto_instance(inst), | |
843 | crypto_attr_alg_name(tb[1]), type, mask); | |
844 | if (err) | |
845 | goto err_free_inst; | |
846 | ||
847 | alg = crypto_spawn_aead_alg(&ctx->aead_spawn); | |
848 | err = cryptd_init_instance(aead_crypto_instance(inst), &alg->base); | |
849 | if (err) | |
850 | goto err_free_inst; | |
851 | ||
852 | inst->alg.base.cra_flags |= CRYPTO_ALG_ASYNC | | |
853 | (alg->base.cra_flags & CRYPTO_ALG_INTERNAL); | |
854 | inst->alg.base.cra_ctxsize = sizeof(struct cryptd_aead_ctx); | |
855 | ||
856 | inst->alg.ivsize = crypto_aead_alg_ivsize(alg); | |
857 | inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg); | |
858 | ||
859 | inst->alg.init = cryptd_aead_init_tfm; | |
860 | inst->alg.exit = cryptd_aead_exit_tfm; | |
861 | inst->alg.setkey = cryptd_aead_setkey; | |
862 | inst->alg.setauthsize = cryptd_aead_setauthsize; | |
863 | inst->alg.encrypt = cryptd_aead_encrypt_enqueue; | |
864 | inst->alg.decrypt = cryptd_aead_decrypt_enqueue; | |
865 | ||
866 | inst->free = cryptd_aead_free; | |
867 | ||
868 | err = aead_register_instance(tmpl, inst); | |
869 | if (err) { | |
870 | err_free_inst: | |
871 | cryptd_aead_free(inst); | |
872 | } | |
873 | return err; | |
874 | } | |
875 | ||
876 | static struct cryptd_queue queue; | |
877 | ||
878 | static int cryptd_create(struct crypto_template *tmpl, struct rtattr **tb) | |
879 | { | |
880 | struct crypto_attr_type *algt; | |
881 | ||
882 | algt = crypto_get_attr_type(tb); | |
883 | if (IS_ERR(algt)) | |
884 | return PTR_ERR(algt); | |
885 | ||
886 | switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) { | |
887 | case CRYPTO_ALG_TYPE_SKCIPHER: | |
888 | return cryptd_create_skcipher(tmpl, tb, algt, &queue); | |
889 | case CRYPTO_ALG_TYPE_HASH: | |
890 | return cryptd_create_hash(tmpl, tb, algt, &queue); | |
891 | case CRYPTO_ALG_TYPE_AEAD: | |
892 | return cryptd_create_aead(tmpl, tb, algt, &queue); | |
893 | } | |
894 | ||
895 | return -EINVAL; | |
896 | } | |
897 | ||
898 | static struct crypto_template cryptd_tmpl = { | |
899 | .name = "cryptd", | |
900 | .create = cryptd_create, | |
901 | .module = THIS_MODULE, | |
902 | }; | |
903 | ||
904 | struct cryptd_skcipher *cryptd_alloc_skcipher(const char *alg_name, | |
905 | u32 type, u32 mask) | |
906 | { | |
907 | char cryptd_alg_name[CRYPTO_MAX_ALG_NAME]; | |
908 | struct cryptd_skcipher_ctx *ctx; | |
909 | struct crypto_skcipher *tfm; | |
910 | ||
911 | if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME, | |
912 | "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME) | |
913 | return ERR_PTR(-EINVAL); | |
914 | ||
915 | tfm = crypto_alloc_skcipher(cryptd_alg_name, type, mask); | |
916 | if (IS_ERR(tfm)) | |
917 | return ERR_CAST(tfm); | |
918 | ||
919 | if (tfm->base.__crt_alg->cra_module != THIS_MODULE) { | |
920 | crypto_free_skcipher(tfm); | |
921 | return ERR_PTR(-EINVAL); | |
922 | } | |
923 | ||
924 | ctx = crypto_skcipher_ctx(tfm); | |
925 | refcount_set(&ctx->refcnt, 1); | |
926 | ||
927 | return container_of(tfm, struct cryptd_skcipher, base); | |
928 | } | |
929 | EXPORT_SYMBOL_GPL(cryptd_alloc_skcipher); | |
930 | ||
931 | struct crypto_skcipher *cryptd_skcipher_child(struct cryptd_skcipher *tfm) | |
932 | { | |
933 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base); | |
934 | ||
935 | return &ctx->child->base; | |
936 | } | |
937 | EXPORT_SYMBOL_GPL(cryptd_skcipher_child); | |
938 | ||
939 | bool cryptd_skcipher_queued(struct cryptd_skcipher *tfm) | |
940 | { | |
941 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base); | |
942 | ||
943 | return refcount_read(&ctx->refcnt) - 1; | |
944 | } | |
945 | EXPORT_SYMBOL_GPL(cryptd_skcipher_queued); | |
946 | ||
947 | void cryptd_free_skcipher(struct cryptd_skcipher *tfm) | |
948 | { | |
949 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base); | |
950 | ||
951 | if (refcount_dec_and_test(&ctx->refcnt)) | |
952 | crypto_free_skcipher(&tfm->base); | |
953 | } | |
954 | EXPORT_SYMBOL_GPL(cryptd_free_skcipher); | |
955 | ||
956 | struct cryptd_ahash *cryptd_alloc_ahash(const char *alg_name, | |
957 | u32 type, u32 mask) | |
958 | { | |
959 | char cryptd_alg_name[CRYPTO_MAX_ALG_NAME]; | |
960 | struct cryptd_hash_ctx *ctx; | |
961 | struct crypto_ahash *tfm; | |
962 | ||
963 | if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME, | |
964 | "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME) | |
965 | return ERR_PTR(-EINVAL); | |
966 | tfm = crypto_alloc_ahash(cryptd_alg_name, type, mask); | |
967 | if (IS_ERR(tfm)) | |
968 | return ERR_CAST(tfm); | |
969 | if (tfm->base.__crt_alg->cra_module != THIS_MODULE) { | |
970 | crypto_free_ahash(tfm); | |
971 | return ERR_PTR(-EINVAL); | |
972 | } | |
973 | ||
974 | ctx = crypto_ahash_ctx(tfm); | |
975 | refcount_set(&ctx->refcnt, 1); | |
976 | ||
977 | return __cryptd_ahash_cast(tfm); | |
978 | } | |
979 | EXPORT_SYMBOL_GPL(cryptd_alloc_ahash); | |
980 | ||
981 | struct crypto_shash *cryptd_ahash_child(struct cryptd_ahash *tfm) | |
982 | { | |
983 | struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base); | |
984 | ||
985 | return ctx->child; | |
986 | } | |
987 | EXPORT_SYMBOL_GPL(cryptd_ahash_child); | |
988 | ||
989 | struct shash_desc *cryptd_shash_desc(struct ahash_request *req) | |
990 | { | |
991 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); | |
992 | return &rctx->desc; | |
993 | } | |
994 | EXPORT_SYMBOL_GPL(cryptd_shash_desc); | |
995 | ||
996 | bool cryptd_ahash_queued(struct cryptd_ahash *tfm) | |
997 | { | |
998 | struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base); | |
999 | ||
1000 | return refcount_read(&ctx->refcnt) - 1; | |
1001 | } | |
1002 | EXPORT_SYMBOL_GPL(cryptd_ahash_queued); | |
1003 | ||
1004 | void cryptd_free_ahash(struct cryptd_ahash *tfm) | |
1005 | { | |
1006 | struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base); | |
1007 | ||
1008 | if (refcount_dec_and_test(&ctx->refcnt)) | |
1009 | crypto_free_ahash(&tfm->base); | |
1010 | } | |
1011 | EXPORT_SYMBOL_GPL(cryptd_free_ahash); | |
1012 | ||
1013 | struct cryptd_aead *cryptd_alloc_aead(const char *alg_name, | |
1014 | u32 type, u32 mask) | |
1015 | { | |
1016 | char cryptd_alg_name[CRYPTO_MAX_ALG_NAME]; | |
1017 | struct cryptd_aead_ctx *ctx; | |
1018 | struct crypto_aead *tfm; | |
1019 | ||
1020 | if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME, | |
1021 | "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME) | |
1022 | return ERR_PTR(-EINVAL); | |
1023 | tfm = crypto_alloc_aead(cryptd_alg_name, type, mask); | |
1024 | if (IS_ERR(tfm)) | |
1025 | return ERR_CAST(tfm); | |
1026 | if (tfm->base.__crt_alg->cra_module != THIS_MODULE) { | |
1027 | crypto_free_aead(tfm); | |
1028 | return ERR_PTR(-EINVAL); | |
1029 | } | |
1030 | ||
1031 | ctx = crypto_aead_ctx(tfm); | |
1032 | refcount_set(&ctx->refcnt, 1); | |
1033 | ||
1034 | return __cryptd_aead_cast(tfm); | |
1035 | } | |
1036 | EXPORT_SYMBOL_GPL(cryptd_alloc_aead); | |
1037 | ||
1038 | struct crypto_aead *cryptd_aead_child(struct cryptd_aead *tfm) | |
1039 | { | |
1040 | struct cryptd_aead_ctx *ctx; | |
1041 | ctx = crypto_aead_ctx(&tfm->base); | |
1042 | return ctx->child; | |
1043 | } | |
1044 | EXPORT_SYMBOL_GPL(cryptd_aead_child); | |
1045 | ||
1046 | bool cryptd_aead_queued(struct cryptd_aead *tfm) | |
1047 | { | |
1048 | struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base); | |
1049 | ||
1050 | return refcount_read(&ctx->refcnt) - 1; | |
1051 | } | |
1052 | EXPORT_SYMBOL_GPL(cryptd_aead_queued); | |
1053 | ||
1054 | void cryptd_free_aead(struct cryptd_aead *tfm) | |
1055 | { | |
1056 | struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base); | |
1057 | ||
1058 | if (refcount_dec_and_test(&ctx->refcnt)) | |
1059 | crypto_free_aead(&tfm->base); | |
1060 | } | |
1061 | EXPORT_SYMBOL_GPL(cryptd_free_aead); | |
1062 | ||
1063 | static int __init cryptd_init(void) | |
1064 | { | |
1065 | int err; | |
1066 | ||
1067 | cryptd_wq = alloc_workqueue("cryptd", WQ_MEM_RECLAIM | WQ_CPU_INTENSIVE, | |
1068 | 1); | |
1069 | if (!cryptd_wq) | |
1070 | return -ENOMEM; | |
1071 | ||
1072 | err = cryptd_init_queue(&queue, cryptd_max_cpu_qlen); | |
1073 | if (err) | |
1074 | goto err_destroy_wq; | |
1075 | ||
1076 | err = crypto_register_template(&cryptd_tmpl); | |
1077 | if (err) | |
1078 | goto err_fini_queue; | |
1079 | ||
1080 | return 0; | |
1081 | ||
1082 | err_fini_queue: | |
1083 | cryptd_fini_queue(&queue); | |
1084 | err_destroy_wq: | |
1085 | destroy_workqueue(cryptd_wq); | |
1086 | return err; | |
1087 | } | |
1088 | ||
1089 | static void __exit cryptd_exit(void) | |
1090 | { | |
1091 | destroy_workqueue(cryptd_wq); | |
1092 | cryptd_fini_queue(&queue); | |
1093 | crypto_unregister_template(&cryptd_tmpl); | |
1094 | } | |
1095 | ||
1096 | subsys_initcall(cryptd_init); | |
1097 | module_exit(cryptd_exit); | |
1098 | ||
1099 | MODULE_LICENSE("GPL"); | |
1100 | MODULE_DESCRIPTION("Software async crypto daemon"); | |
1101 | MODULE_ALIAS_CRYPTO("cryptd"); |