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