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2024-12-19 9370bb92b2d16684ee45cf24e879c93c509162da 
 kernel/crypto/cryptd.c
....@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /*
23  * Software async crypto daemon.
34  *
....@@ -9,20 +10,13 @@
910  *             Gabriele Paoloni <gabriele.paoloni@intel.com>
1011  *             Aidan O'Mahony (aidan.o.mahony@intel.com)
1112  *    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
- *
1813  */
1914 
2015 #include <crypto/internal/hash.h>
2116 #include <crypto/internal/aead.h>
2217 #include <crypto/internal/skcipher.h>
2318 #include <crypto/cryptd.h>
24
-#include <crypto/crypto_wq.h>
25
-#include <linux/atomic.h>
19
+#include <linux/refcount.h>
2620 #include <linux/err.h>
2721 #include <linux/init.h>
2822 #include <linux/kernel.h>
....@@ -31,10 +25,13 @@
3125 #include <linux/scatterlist.h>
3226 #include <linux/sched.h>
3327 #include <linux/slab.h>
28
+#include <linux/workqueue.h>
3429 
3530 static unsigned int cryptd_max_cpu_qlen = 1000;
3631 module_param(cryptd_max_cpu_qlen, uint, 0);
3732 MODULE_PARM_DESC(cryptd_max_cpu_qlen, "Set cryptd Max queue depth");
33
+
34
+static struct workqueue_struct *cryptd_wq;
3835 
3936 struct cryptd_cpu_queue {
4037 	struct crypto_queue queue;
....@@ -42,6 +39,10 @@
4239 };
4340 
4441 struct cryptd_queue {
42
+	/*
43
+	 * Protected by disabling BH to allow enqueueing from softinterrupt and
44
+	 * dequeuing from kworker (cryptd_queue_worker()).
45
+	 */
4546 	struct cryptd_cpu_queue __percpu *cpu_queue;
4647 };
4748 
....@@ -65,26 +66,18 @@
6566 	struct cryptd_queue *queue;
6667 };
6768 
68
-struct cryptd_blkcipher_ctx {
69
-	atomic_t refcnt;
70
-	struct crypto_blkcipher *child;
71
-};
72
-
73
-struct cryptd_blkcipher_request_ctx {
74
-	crypto_completion_t complete;
75
-};
76
-
7769 struct cryptd_skcipher_ctx {
78
-	atomic_t refcnt;
70
+	refcount_t refcnt;
7971 	struct crypto_skcipher *child;
8072 };
8173 
8274 struct cryptd_skcipher_request_ctx {
8375 	crypto_completion_t complete;
76
+	struct skcipher_request req;
8477 };
8578 
8679 struct cryptd_hash_ctx {
87
-	atomic_t refcnt;
80
+	refcount_t refcnt;
8881 	struct crypto_shash *child;
8982 };
9083 
....@@ -94,7 +87,7 @@
9487 };
9588 
9689 struct cryptd_aead_ctx {
97
-	atomic_t refcnt;
90
+	refcount_t refcnt;
9891 	struct crypto_aead *child;
9992 };
10093 
....@@ -137,28 +130,28 @@
137130 static int cryptd_enqueue_request(struct cryptd_queue *queue,
138131 				  struct crypto_async_request *request)
139132 {
140
-	int cpu, err;
133
+	int err;
141134 	struct cryptd_cpu_queue *cpu_queue;
142
-	atomic_t *refcnt;
135
+	refcount_t *refcnt;
143136 
144
-	cpu = get_cpu();
137
+	local_bh_disable();
145138 	cpu_queue = this_cpu_ptr(queue->cpu_queue);
146139 	err = crypto_enqueue_request(&cpu_queue->queue, request);
147140 
148141 	refcnt = crypto_tfm_ctx(request->tfm);
149142 
150143 	if (err == -ENOSPC)
151
-		goto out_put_cpu;
144
+		goto out;
152145 
153
-	queue_work_on(cpu, kcrypto_wq, &cpu_queue->work);
146
+	queue_work_on(smp_processor_id(), cryptd_wq, &cpu_queue->work);
154147 
155
-	if (!atomic_read(refcnt))
156
-		goto out_put_cpu;
148
+	if (!refcount_read(refcnt))
149
+		goto out;
157150 
158
-	atomic_inc(refcnt);
151
+	refcount_inc(refcnt);
159152 
160
-out_put_cpu:
161
-	put_cpu();
153
+out:
154
+	local_bh_enable();
162155 
163156 	return err;
164157 }
....@@ -174,15 +167,10 @@
174167 	cpu_queue = container_of(work, struct cryptd_cpu_queue, work);
175168 	/*
176169 	 * Only handle one request at a time to avoid hogging crypto workqueue.
177
-	 * preempt_disable/enable is used to prevent being preempted by
178
-	 * cryptd_enqueue_request(). local_bh_disable/enable is used to prevent
179
-	 * cryptd_enqueue_request() being accessed from software interrupts.
180170 	 */
181171 	local_bh_disable();
182
-	preempt_disable();
183172 	backlog = crypto_get_backlog(&cpu_queue->queue);
184173 	req = crypto_dequeue_request(&cpu_queue->queue);
185
-	preempt_enable();
186174 	local_bh_enable();
187175 
188176 	if (!req)
....@@ -193,7 +181,7 @@
193181 	req->complete(req, 0);
194182 
195183 	if (cpu_queue->queue.qlen)
196
-		queue_work(kcrypto_wq, &cpu_queue->work);
184
+		queue_work(cryptd_wq, &cpu_queue->work);
197185 }
198186 
199187 static inline struct cryptd_queue *cryptd_get_queue(struct crypto_tfm *tfm)
....@@ -203,140 +191,20 @@
203191 	return ictx->queue;
204192 }
205193 
206
-static inline void cryptd_check_internal(struct rtattr **tb, u32 *type,
207
-					 u32 *mask)
194
+static void cryptd_type_and_mask(struct crypto_attr_type *algt,
195
+				 u32 *type, u32 *mask)
208196 {
209
-	struct crypto_attr_type *algt;
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;
210203 
211
-	algt = crypto_get_attr_type(tb);
212
-	if (IS_ERR(algt))
213
-		return;
204
+	/* No point in cryptd wrapping an algorithm that's already async. */
205
+	*mask |= CRYPTO_ALG_ASYNC;
214206 
215
-	*type |= algt->type & CRYPTO_ALG_INTERNAL;
216
-	*mask |= algt->mask & CRYPTO_ALG_INTERNAL;
217
-}
218
-
219
-static int cryptd_blkcipher_setkey(struct crypto_ablkcipher *parent,
220
-				   const u8 *key, unsigned int keylen)
221
-{
222
-	struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(parent);
223
-	struct crypto_blkcipher *child = ctx->child;
224
-	int err;
225
-
226
-	crypto_blkcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
227
-	crypto_blkcipher_set_flags(child, crypto_ablkcipher_get_flags(parent) &
228
-					  CRYPTO_TFM_REQ_MASK);
229
-	err = crypto_blkcipher_setkey(child, key, keylen);
230
-	crypto_ablkcipher_set_flags(parent, crypto_blkcipher_get_flags(child) &
231
-					    CRYPTO_TFM_RES_MASK);
232
-	return err;
233
-}
234
-
235
-static void cryptd_blkcipher_crypt(struct ablkcipher_request *req,
236
-				   struct crypto_blkcipher *child,
237
-				   int err,
238
-				   int (*crypt)(struct blkcipher_desc *desc,
239
-						struct scatterlist *dst,
240
-						struct scatterlist *src,
241
-						unsigned int len))
242
-{
243
-	struct cryptd_blkcipher_request_ctx *rctx;
244
-	struct cryptd_blkcipher_ctx *ctx;
245
-	struct crypto_ablkcipher *tfm;
246
-	struct blkcipher_desc desc;
247
-	int refcnt;
248
-
249
-	rctx = ablkcipher_request_ctx(req);
250
-
251
-	if (unlikely(err == -EINPROGRESS))
252
-		goto out;
253
-
254
-	desc.tfm = child;
255
-	desc.info = req->info;
256
-	desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP;
257
-
258
-	err = crypt(&desc, req->dst, req->src, req->nbytes);
259
-
260
-	req->base.complete = rctx->complete;
261
-
262
-out:
263
-	tfm = crypto_ablkcipher_reqtfm(req);
264
-	ctx = crypto_ablkcipher_ctx(tfm);
265
-	refcnt = atomic_read(&ctx->refcnt);
266
-
267
-	local_bh_disable();
268
-	rctx->complete(&req->base, err);
269
-	local_bh_enable();
270
-
271
-	if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt))
272
-		crypto_free_ablkcipher(tfm);
273
-}
274
-
275
-static void cryptd_blkcipher_encrypt(struct crypto_async_request *req, int err)
276
-{
277
-	struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(req->tfm);
278
-	struct crypto_blkcipher *child = ctx->child;
279
-
280
-	cryptd_blkcipher_crypt(ablkcipher_request_cast(req), child, err,
281
-			       crypto_blkcipher_crt(child)->encrypt);
282
-}
283
-
284
-static void cryptd_blkcipher_decrypt(struct crypto_async_request *req, int err)
285
-{
286
-	struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(req->tfm);
287
-	struct crypto_blkcipher *child = ctx->child;
288
-
289
-	cryptd_blkcipher_crypt(ablkcipher_request_cast(req), child, err,
290
-			       crypto_blkcipher_crt(child)->decrypt);
291
-}
292
-
293
-static int cryptd_blkcipher_enqueue(struct ablkcipher_request *req,
294
-				    crypto_completion_t compl)
295
-{
296
-	struct cryptd_blkcipher_request_ctx *rctx = ablkcipher_request_ctx(req);
297
-	struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
298
-	struct cryptd_queue *queue;
299
-
300
-	queue = cryptd_get_queue(crypto_ablkcipher_tfm(tfm));
301
-	rctx->complete = req->base.complete;
302
-	req->base.complete = compl;
303
-
304
-	return cryptd_enqueue_request(queue, &req->base);
305
-}
306
-
307
-static int cryptd_blkcipher_encrypt_enqueue(struct ablkcipher_request *req)
308
-{
309
-	return cryptd_blkcipher_enqueue(req, cryptd_blkcipher_encrypt);
310
-}
311
-
312
-static int cryptd_blkcipher_decrypt_enqueue(struct ablkcipher_request *req)
313
-{
314
-	return cryptd_blkcipher_enqueue(req, cryptd_blkcipher_decrypt);
315
-}
316
-
317
-static int cryptd_blkcipher_init_tfm(struct crypto_tfm *tfm)
318
-{
319
-	struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
320
-	struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst);
321
-	struct crypto_spawn *spawn = &ictx->spawn;
322
-	struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(tfm);
323
-	struct crypto_blkcipher *cipher;
324
-
325
-	cipher = crypto_spawn_blkcipher(spawn);
326
-	if (IS_ERR(cipher))
327
-		return PTR_ERR(cipher);
328
-
329
-	ctx->child = cipher;
330
-	tfm->crt_ablkcipher.reqsize =
331
-		sizeof(struct cryptd_blkcipher_request_ctx);
332
-	return 0;
333
-}
334
-
335
-static void cryptd_blkcipher_exit_tfm(struct crypto_tfm *tfm)
336
-{
337
-	struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(tfm);
338
-
339
-	crypto_free_blkcipher(ctx->child);
207
+	*mask |= crypto_algt_inherited_mask(algt);
340208 }
341209 
342210 static int cryptd_init_instance(struct crypto_instance *inst,
....@@ -356,109 +224,17 @@
356224 	return 0;
357225 }
358226 
359
-static void *cryptd_alloc_instance(struct crypto_alg *alg, unsigned int head,
360
-				   unsigned int tail)
361
-{
362
-	char *p;
363
-	struct crypto_instance *inst;
364
-	int err;
365
-
366
-	p = kzalloc(head + sizeof(*inst) + tail, GFP_KERNEL);
367
-	if (!p)
368
-		return ERR_PTR(-ENOMEM);
369
-
370
-	inst = (void *)(p + head);
371
-
372
-	err = cryptd_init_instance(inst, alg);
373
-	if (err)
374
-		goto out_free_inst;
375
-
376
-out:
377
-	return p;
378
-
379
-out_free_inst:
380
-	kfree(p);
381
-	p = ERR_PTR(err);
382
-	goto out;
383
-}
384
-
385
-static int cryptd_create_blkcipher(struct crypto_template *tmpl,
386
-				   struct rtattr **tb,
387
-				   struct cryptd_queue *queue)
388
-{
389
-	struct cryptd_instance_ctx *ctx;
390
-	struct crypto_instance *inst;
391
-	struct crypto_alg *alg;
392
-	u32 type = CRYPTO_ALG_TYPE_BLKCIPHER;
393
-	u32 mask = CRYPTO_ALG_TYPE_MASK;
394
-	int err;
395
-
396
-	cryptd_check_internal(tb, &type, &mask);
397
-
398
-	alg = crypto_get_attr_alg(tb, type, mask);
399
-	if (IS_ERR(alg))
400
-		return PTR_ERR(alg);
401
-
402
-	inst = cryptd_alloc_instance(alg, 0, sizeof(*ctx));
403
-	err = PTR_ERR(inst);
404
-	if (IS_ERR(inst))
405
-		goto out_put_alg;
406
-
407
-	ctx = crypto_instance_ctx(inst);
408
-	ctx->queue = queue;
409
-
410
-	err = crypto_init_spawn(&ctx->spawn, alg, inst,
411
-				CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC);
412
-	if (err)
413
-		goto out_free_inst;
414
-
415
-	type = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC;
416
-	if (alg->cra_flags & CRYPTO_ALG_INTERNAL)
417
-		type |= CRYPTO_ALG_INTERNAL;
418
-	inst->alg.cra_flags = type;
419
-	inst->alg.cra_type = &crypto_ablkcipher_type;
420
-
421
-	inst->alg.cra_ablkcipher.ivsize = alg->cra_blkcipher.ivsize;
422
-	inst->alg.cra_ablkcipher.min_keysize = alg->cra_blkcipher.min_keysize;
423
-	inst->alg.cra_ablkcipher.max_keysize = alg->cra_blkcipher.max_keysize;
424
-
425
-	inst->alg.cra_ablkcipher.geniv = alg->cra_blkcipher.geniv;
426
-
427
-	inst->alg.cra_ctxsize = sizeof(struct cryptd_blkcipher_ctx);
428
-
429
-	inst->alg.cra_init = cryptd_blkcipher_init_tfm;
430
-	inst->alg.cra_exit = cryptd_blkcipher_exit_tfm;
431
-
432
-	inst->alg.cra_ablkcipher.setkey = cryptd_blkcipher_setkey;
433
-	inst->alg.cra_ablkcipher.encrypt = cryptd_blkcipher_encrypt_enqueue;
434
-	inst->alg.cra_ablkcipher.decrypt = cryptd_blkcipher_decrypt_enqueue;
435
-
436
-	err = crypto_register_instance(tmpl, inst);
437
-	if (err) {
438
-		crypto_drop_spawn(&ctx->spawn);
439
-out_free_inst:
440
-		kfree(inst);
441
-	}
442
-
443
-out_put_alg:
444
-	crypto_mod_put(alg);
445
-	return err;
446
-}
447
-
448227 static int cryptd_skcipher_setkey(struct crypto_skcipher *parent,
449228 				  const u8 *key, unsigned int keylen)
450229 {
451230 	struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(parent);
452231 	struct crypto_skcipher *child = ctx->child;
453
-	int err;
454232 
455233 	crypto_skcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
456
-	crypto_skcipher_set_flags(child, crypto_skcipher_get_flags(parent) &
457
-					 CRYPTO_TFM_REQ_MASK);
458
-	err = crypto_skcipher_setkey(child, key, keylen);
459
-	crypto_skcipher_set_flags(parent, crypto_skcipher_get_flags(child) &
460
-					  CRYPTO_TFM_RES_MASK);
461
-	return err;
234
+	crypto_skcipher_set_flags(child,
235
+				  crypto_skcipher_get_flags(parent) &
236
+				  CRYPTO_TFM_REQ_MASK);
237
+	return crypto_skcipher_setkey(child, key, keylen);
462238 }
463239 
464240 static void cryptd_skcipher_complete(struct skcipher_request *req, int err)
....@@ -466,13 +242,13 @@
466242 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
467243 	struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
468244 	struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
469
-	int refcnt = atomic_read(&ctx->refcnt);
245
+	int refcnt = refcount_read(&ctx->refcnt);
470246 
471247 	local_bh_disable();
472248 	rctx->complete(&req->base, err);
473249 	local_bh_enable();
474250 
475
-	if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt))
251
+	if (err != -EINPROGRESS && refcnt && refcount_dec_and_test(&ctx->refcnt))
476252 		crypto_free_skcipher(tfm);
477253 }
478254 
....@@ -483,8 +259,8 @@
483259 	struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
484260 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
485261 	struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
262
+	struct skcipher_request *subreq = &rctx->req;
486263 	struct crypto_skcipher *child = ctx->child;
487
-	SKCIPHER_REQUEST_ON_STACK(subreq, child);
488264 
489265 	if (unlikely(err == -EINPROGRESS))
490266 		goto out;
....@@ -511,8 +287,8 @@
511287 	struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
512288 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
513289 	struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
290
+	struct skcipher_request *subreq = &rctx->req;
514291 	struct crypto_skcipher *child = ctx->child;
515
-	SKCIPHER_REQUEST_ON_STACK(subreq, child);
516292 
517293 	if (unlikely(err == -EINPROGRESS))
518294 		goto out;
....@@ -570,7 +346,8 @@
570346 
571347 	ctx->child = cipher;
572348 	crypto_skcipher_set_reqsize(
573
-		tfm, sizeof(struct cryptd_skcipher_request_ctx));
349
+		tfm, sizeof(struct cryptd_skcipher_request_ctx) +
350
+		     crypto_skcipher_reqsize(cipher));
574351 	return 0;
575352 }
576353 
....@@ -591,24 +368,17 @@
591368 
592369 static int cryptd_create_skcipher(struct crypto_template *tmpl,
593370 				  struct rtattr **tb,
371
+				  struct crypto_attr_type *algt,
594372 				  struct cryptd_queue *queue)
595373 {
596374 	struct skcipherd_instance_ctx *ctx;
597375 	struct skcipher_instance *inst;
598376 	struct skcipher_alg *alg;
599
-	const char *name;
600377 	u32 type;
601378 	u32 mask;
602379 	int err;
603380 
604
-	type = 0;
605
-	mask = CRYPTO_ALG_ASYNC;
606
-
607
-	cryptd_check_internal(tb, &type, &mask);
608
-
609
-	name = crypto_attr_alg_name(tb[1]);
610
-	if (IS_ERR(name))
611
-		return PTR_ERR(name);
381
+	cryptd_type_and_mask(algt, &type, &mask);
612382 
613383 	inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
614384 	if (!inst)
....@@ -617,19 +387,18 @@
617387 	ctx = skcipher_instance_ctx(inst);
618388 	ctx->queue = queue;
619389 
620
-	crypto_set_skcipher_spawn(&ctx->spawn, skcipher_crypto_instance(inst));
621
-	err = crypto_grab_skcipher(&ctx->spawn, name, type, mask);
390
+	err = crypto_grab_skcipher(&ctx->spawn, skcipher_crypto_instance(inst),
391
+				   crypto_attr_alg_name(tb[1]), type, mask);
622392 	if (err)
623
-		goto out_free_inst;
393
+		goto err_free_inst;
624394 
625395 	alg = crypto_spawn_skcipher_alg(&ctx->spawn);
626396 	err = cryptd_init_instance(skcipher_crypto_instance(inst), &alg->base);
627397 	if (err)
628
-		goto out_drop_skcipher;
398
+		goto err_free_inst;
629399 
630
-	inst->alg.base.cra_flags = CRYPTO_ALG_ASYNC |
631
-				   (alg->base.cra_flags & CRYPTO_ALG_INTERNAL);
632
-
400
+	inst->alg.base.cra_flags |= CRYPTO_ALG_ASYNC |
401
+		(alg->base.cra_flags & CRYPTO_ALG_INTERNAL);
633402 	inst->alg.ivsize = crypto_skcipher_alg_ivsize(alg);
634403 	inst->alg.chunksize = crypto_skcipher_alg_chunksize(alg);
635404 	inst->alg.min_keysize = crypto_skcipher_alg_min_keysize(alg);
....@@ -648,10 +417,8 @@
648417 
649418 	err = skcipher_register_instance(tmpl, inst);
650419 	if (err) {
651
-out_drop_skcipher:
652
-		crypto_drop_skcipher(&ctx->spawn);
653
-out_free_inst:
654
-		kfree(inst);
420
+err_free_inst:
421
+		cryptd_skcipher_free(inst);
655422 	}
656423 	return err;
657424 }
....@@ -687,15 +454,11 @@
687454 {
688455 	struct cryptd_hash_ctx *ctx   = crypto_ahash_ctx(parent);
689456 	struct crypto_shash *child = ctx->child;
690
-	int err;
691457 
692458 	crypto_shash_clear_flags(child, CRYPTO_TFM_REQ_MASK);
693459 	crypto_shash_set_flags(child, crypto_ahash_get_flags(parent) &
694460 				      CRYPTO_TFM_REQ_MASK);
695
-	err = crypto_shash_setkey(child, key, keylen);
696
-	crypto_ahash_set_flags(parent, crypto_shash_get_flags(child) &
697
-				       CRYPTO_TFM_RES_MASK);
698
-	return err;
461
+	return crypto_shash_setkey(child, key, keylen);
699462 }
700463 
701464 static int cryptd_hash_enqueue(struct ahash_request *req,
....@@ -717,13 +480,13 @@
717480 	struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
718481 	struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm);
719482 	struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
720
-	int refcnt = atomic_read(&ctx->refcnt);
483
+	int refcnt = refcount_read(&ctx->refcnt);
721484 
722485 	local_bh_disable();
723486 	rctx->complete(&req->base, err);
724487 	local_bh_enable();
725488 
726
-	if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt))
489
+	if (err != -EINPROGRESS && refcnt && refcount_dec_and_test(&ctx->refcnt))
727490 		crypto_free_ahash(tfm);
728491 }
729492 
....@@ -739,7 +502,6 @@
739502 		goto out;
740503 
741504 	desc->tfm = child;
742
-	desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
743505 
744506 	err = crypto_shash_init(desc);
745507 
....@@ -831,7 +593,6 @@
831593 		goto out;
832594 
833595 	desc->tfm = child;
834
-	desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
835596 
836597 	err = shash_ahash_digest(req, desc);
837598 
....@@ -860,49 +621,53 @@
860621 	struct shash_desc *desc = cryptd_shash_desc(req);
861622 
862623 	desc->tfm = ctx->child;
863
-	desc->flags = req->base.flags;
864624 
865625 	return crypto_shash_import(desc, in);
866626 }
867627 
628
+static void cryptd_hash_free(struct ahash_instance *inst)
629
+{
630
+	struct hashd_instance_ctx *ctx = ahash_instance_ctx(inst);
631
+
632
+	crypto_drop_shash(&ctx->spawn);
633
+	kfree(inst);
634
+}
635
+
868636 static int cryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb,
637
+			      struct crypto_attr_type *algt,
869638 			      struct cryptd_queue *queue)
870639 {
871640 	struct hashd_instance_ctx *ctx;
872641 	struct ahash_instance *inst;
873
-	struct shash_alg *salg;
874
-	struct crypto_alg *alg;
875
-	u32 type = 0;
876
-	u32 mask = 0;
642
+	struct shash_alg *alg;
643
+	u32 type;
644
+	u32 mask;
877645 	int err;
878646 
879
-	cryptd_check_internal(tb, &type, &mask);
647
+	cryptd_type_and_mask(algt, &type, &mask);
880648 
881
-	salg = shash_attr_alg(tb[1], type, mask);
882
-	if (IS_ERR(salg))
883
-		return PTR_ERR(salg);
884
-
885
-	alg = &salg->base;
886
-	inst = cryptd_alloc_instance(alg, ahash_instance_headroom(),
887
-				     sizeof(*ctx));
888
-	err = PTR_ERR(inst);
889
-	if (IS_ERR(inst))
890
-		goto out_put_alg;
649
+	inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
650
+	if (!inst)
651
+		return -ENOMEM;
891652 
892653 	ctx = ahash_instance_ctx(inst);
893654 	ctx->queue = queue;
894655 
895
-	err = crypto_init_shash_spawn(&ctx->spawn, salg,
896
-				      ahash_crypto_instance(inst));
656
+	err = crypto_grab_shash(&ctx->spawn, ahash_crypto_instance(inst),
657
+				crypto_attr_alg_name(tb[1]), type, mask);
897658 	if (err)
898
-		goto out_free_inst;
659
+		goto err_free_inst;
660
+	alg = crypto_spawn_shash_alg(&ctx->spawn);
899661 
900
-	inst->alg.halg.base.cra_flags = CRYPTO_ALG_ASYNC |
901
-		(alg->cra_flags & (CRYPTO_ALG_INTERNAL |
902
-				   CRYPTO_ALG_OPTIONAL_KEY));
662
+	err = cryptd_init_instance(ahash_crypto_instance(inst), &alg->base);
663
+	if (err)
664
+		goto err_free_inst;
903665 
904
-	inst->alg.halg.digestsize = salg->digestsize;
905
-	inst->alg.halg.statesize = salg->statesize;
666
+	inst->alg.halg.base.cra_flags |= CRYPTO_ALG_ASYNC |
667
+		(alg->base.cra_flags & (CRYPTO_ALG_INTERNAL|
668
+					CRYPTO_ALG_OPTIONAL_KEY));
669
+	inst->alg.halg.digestsize = alg->digestsize;
670
+	inst->alg.halg.statesize = alg->statesize;
906671 	inst->alg.halg.base.cra_ctxsize = sizeof(struct cryptd_hash_ctx);
907672 
908673 	inst->alg.halg.base.cra_init = cryptd_hash_init_tfm;
....@@ -914,19 +679,17 @@
914679 	inst->alg.finup  = cryptd_hash_finup_enqueue;
915680 	inst->alg.export = cryptd_hash_export;
916681 	inst->alg.import = cryptd_hash_import;
917
-	if (crypto_shash_alg_has_setkey(salg))
682
+	if (crypto_shash_alg_has_setkey(alg))
918683 		inst->alg.setkey = cryptd_hash_setkey;
919684 	inst->alg.digest = cryptd_hash_digest_enqueue;
920685 
686
+	inst->free = cryptd_hash_free;
687
+
921688 	err = ahash_register_instance(tmpl, inst);
922689 	if (err) {
923
-		crypto_drop_shash(&ctx->spawn);
924
-out_free_inst:
925
-		kfree(inst);
690
+err_free_inst:
691
+		cryptd_hash_free(inst);
926692 	}
927
-
928
-out_put_alg:
929
-	crypto_mod_put(alg);
930693 	return err;
931694 }
932695 
....@@ -971,13 +734,13 @@
971734 
972735 out:
973736 	ctx = crypto_aead_ctx(tfm);
974
-	refcnt = atomic_read(&ctx->refcnt);
737
+	refcnt = refcount_read(&ctx->refcnt);
975738 
976739 	local_bh_disable();
977740 	compl(&req->base, err);
978741 	local_bh_enable();
979742 
980
-	if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt))
743
+	if (err != -EINPROGRESS && refcnt && refcount_dec_and_test(&ctx->refcnt))
981744 		crypto_free_aead(tfm);
982745 }
983746 
....@@ -1048,23 +811,27 @@
1048811 	crypto_free_aead(ctx->child);
1049812 }
1050813 
814
+static void cryptd_aead_free(struct aead_instance *inst)
815
+{
816
+	struct aead_instance_ctx *ctx = aead_instance_ctx(inst);
817
+
818
+	crypto_drop_aead(&ctx->aead_spawn);
819
+	kfree(inst);
820
+}
821
+
1051822 static int cryptd_create_aead(struct crypto_template *tmpl,
1052823 		              struct rtattr **tb,
824
+			      struct crypto_attr_type *algt,
1053825 			      struct cryptd_queue *queue)
1054826 {
1055827 	struct aead_instance_ctx *ctx;
1056828 	struct aead_instance *inst;
1057829 	struct aead_alg *alg;
1058
-	const char *name;
1059
-	u32 type = 0;
1060
-	u32 mask = CRYPTO_ALG_ASYNC;
830
+	u32 type;
831
+	u32 mask;
1061832 	int err;
1062833 
1063
-	cryptd_check_internal(tb, &type, &mask);
1064
-
1065
-	name = crypto_attr_alg_name(tb[1]);
1066
-	if (IS_ERR(name))
1067
-		return PTR_ERR(name);
834
+	cryptd_type_and_mask(algt, &type, &mask);
1068835 
1069836 	inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
1070837 	if (!inst)
....@@ -1073,18 +840,18 @@
1073840 	ctx = aead_instance_ctx(inst);
1074841 	ctx->queue = queue;
1075842 
1076
-	crypto_set_aead_spawn(&ctx->aead_spawn, aead_crypto_instance(inst));
1077
-	err = crypto_grab_aead(&ctx->aead_spawn, name, type, mask);
843
+	err = crypto_grab_aead(&ctx->aead_spawn, aead_crypto_instance(inst),
844
+			       crypto_attr_alg_name(tb[1]), type, mask);
1078845 	if (err)
1079
-		goto out_free_inst;
846
+		goto err_free_inst;
1080847 
1081848 	alg = crypto_spawn_aead_alg(&ctx->aead_spawn);
1082849 	err = cryptd_init_instance(aead_crypto_instance(inst), &alg->base);
1083850 	if (err)
1084
-		goto out_drop_aead;
851
+		goto err_free_inst;
1085852 
1086
-	inst->alg.base.cra_flags = CRYPTO_ALG_ASYNC |
1087
-				   (alg->base.cra_flags & CRYPTO_ALG_INTERNAL);
853
+	inst->alg.base.cra_flags |= CRYPTO_ALG_ASYNC |
854
+		(alg->base.cra_flags & CRYPTO_ALG_INTERNAL);
1088855 	inst->alg.base.cra_ctxsize = sizeof(struct cryptd_aead_ctx);
1089856 
1090857 	inst->alg.ivsize = crypto_aead_alg_ivsize(alg);
....@@ -1097,12 +864,12 @@
1097864 	inst->alg.encrypt = cryptd_aead_encrypt_enqueue;
1098865 	inst->alg.decrypt = cryptd_aead_decrypt_enqueue;
1099866 
867
+	inst->free = cryptd_aead_free;
868
+
1100869 	err = aead_register_instance(tmpl, inst);
1101870 	if (err) {
1102
-out_drop_aead:
1103
-		crypto_drop_aead(&ctx->aead_spawn);
1104
-out_free_inst:
1105
-		kfree(inst);
871
+err_free_inst:
872
+		cryptd_aead_free(inst);
1106873 	}
1107874 	return err;
1108875 }
....@@ -1118,100 +885,22 @@
1118885 		return PTR_ERR(algt);
1119886 
1120887 	switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) {
1121
-	case CRYPTO_ALG_TYPE_BLKCIPHER:
1122
-		if ((algt->type & CRYPTO_ALG_TYPE_MASK) ==
1123
-		    CRYPTO_ALG_TYPE_BLKCIPHER)
1124
-			return cryptd_create_blkcipher(tmpl, tb, &queue);
1125
-
1126
-		return cryptd_create_skcipher(tmpl, tb, &queue);
1127
-	case CRYPTO_ALG_TYPE_DIGEST:
1128
-		return cryptd_create_hash(tmpl, tb, &queue);
888
+	case CRYPTO_ALG_TYPE_SKCIPHER:
889
+		return cryptd_create_skcipher(tmpl, tb, algt, &queue);
890
+	case CRYPTO_ALG_TYPE_HASH:
891
+		return cryptd_create_hash(tmpl, tb, algt, &queue);
1129892 	case CRYPTO_ALG_TYPE_AEAD:
1130
-		return cryptd_create_aead(tmpl, tb, &queue);
893
+		return cryptd_create_aead(tmpl, tb, algt, &queue);
1131894 	}
1132895 
1133896 	return -EINVAL;
1134897 }
1135898 
1136
-static void cryptd_free(struct crypto_instance *inst)
1137
-{
1138
-	struct cryptd_instance_ctx *ctx = crypto_instance_ctx(inst);
1139
-	struct hashd_instance_ctx *hctx = crypto_instance_ctx(inst);
1140
-	struct aead_instance_ctx *aead_ctx = crypto_instance_ctx(inst);
1141
-
1142
-	switch (inst->alg.cra_flags & CRYPTO_ALG_TYPE_MASK) {
1143
-	case CRYPTO_ALG_TYPE_AHASH:
1144
-		crypto_drop_shash(&hctx->spawn);
1145
-		kfree(ahash_instance(inst));
1146
-		return;
1147
-	case CRYPTO_ALG_TYPE_AEAD:
1148
-		crypto_drop_aead(&aead_ctx->aead_spawn);
1149
-		kfree(aead_instance(inst));
1150
-		return;
1151
-	default:
1152
-		crypto_drop_spawn(&ctx->spawn);
1153
-		kfree(inst);
1154
-	}
1155
-}
1156
-
1157899 static struct crypto_template cryptd_tmpl = {
1158900 	.name = "cryptd",
1159901 	.create = cryptd_create,
1160
-	.free = cryptd_free,
1161902 	.module = THIS_MODULE,
1162903 };
1163
-
1164
-struct cryptd_ablkcipher *cryptd_alloc_ablkcipher(const char *alg_name,
1165
-						  u32 type, u32 mask)
1166
-{
1167
-	char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
1168
-	struct cryptd_blkcipher_ctx *ctx;
1169
-	struct crypto_tfm *tfm;
1170
-
1171
-	if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
1172
-		     "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
1173
-		return ERR_PTR(-EINVAL);
1174
-	type = crypto_skcipher_type(type);
1175
-	mask &= ~CRYPTO_ALG_TYPE_MASK;
1176
-	mask |= (CRYPTO_ALG_GENIV | CRYPTO_ALG_TYPE_BLKCIPHER_MASK);
1177
-	tfm = crypto_alloc_base(cryptd_alg_name, type, mask);
1178
-	if (IS_ERR(tfm))
1179
-		return ERR_CAST(tfm);
1180
-	if (tfm->__crt_alg->cra_module != THIS_MODULE) {
1181
-		crypto_free_tfm(tfm);
1182
-		return ERR_PTR(-EINVAL);
1183
-	}
1184
-
1185
-	ctx = crypto_tfm_ctx(tfm);
1186
-	atomic_set(&ctx->refcnt, 1);
1187
-
1188
-	return __cryptd_ablkcipher_cast(__crypto_ablkcipher_cast(tfm));
1189
-}
1190
-EXPORT_SYMBOL_GPL(cryptd_alloc_ablkcipher);
1191
-
1192
-struct crypto_blkcipher *cryptd_ablkcipher_child(struct cryptd_ablkcipher *tfm)
1193
-{
1194
-	struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(&tfm->base);
1195
-	return ctx->child;
1196
-}
1197
-EXPORT_SYMBOL_GPL(cryptd_ablkcipher_child);
1198
-
1199
-bool cryptd_ablkcipher_queued(struct cryptd_ablkcipher *tfm)
1200
-{
1201
-	struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(&tfm->base);
1202
-
1203
-	return atomic_read(&ctx->refcnt) - 1;
1204
-}
1205
-EXPORT_SYMBOL_GPL(cryptd_ablkcipher_queued);
1206
-
1207
-void cryptd_free_ablkcipher(struct cryptd_ablkcipher *tfm)
1208
-{
1209
-	struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(&tfm->base);
1210
-
1211
-	if (atomic_dec_and_test(&ctx->refcnt))
1212
-		crypto_free_ablkcipher(&tfm->base);
1213
-}
1214
-EXPORT_SYMBOL_GPL(cryptd_free_ablkcipher);
1215904 
1216905 struct cryptd_skcipher *cryptd_alloc_skcipher(const char *alg_name,
1217906 					      u32 type, u32 mask)
....@@ -1234,7 +923,7 @@
1234923 	}
1235924 
1236925 	ctx = crypto_skcipher_ctx(tfm);
1237
-	atomic_set(&ctx->refcnt, 1);
926
+	refcount_set(&ctx->refcnt, 1);
1238927 
1239928 	return container_of(tfm, struct cryptd_skcipher, base);
1240929 }
....@@ -1252,7 +941,7 @@
1252941 {
1253942 	struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
1254943 
1255
-	return atomic_read(&ctx->refcnt) - 1;
944
+	return refcount_read(&ctx->refcnt) - 1;
1256945 }
1257946 EXPORT_SYMBOL_GPL(cryptd_skcipher_queued);
1258947 
....@@ -1260,7 +949,7 @@
1260949 {
1261950 	struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
1262951 
1263
-	if (atomic_dec_and_test(&ctx->refcnt))
952
+	if (refcount_dec_and_test(&ctx->refcnt))
1264953 		crypto_free_skcipher(&tfm->base);
1265954 }
1266955 EXPORT_SYMBOL_GPL(cryptd_free_skcipher);
....@@ -1284,7 +973,7 @@
1284973 	}
1285974 
1286975 	ctx = crypto_ahash_ctx(tfm);
1287
-	atomic_set(&ctx->refcnt, 1);
976
+	refcount_set(&ctx->refcnt, 1);
1288977 
1289978 	return __cryptd_ahash_cast(tfm);
1290979 }
....@@ -1309,7 +998,7 @@
1309998 {
1310999 	struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
13111000 
1312
-	return atomic_read(&ctx->refcnt) - 1;
1001
+	return refcount_read(&ctx->refcnt) - 1;
13131002 }
13141003 EXPORT_SYMBOL_GPL(cryptd_ahash_queued);
13151004 
....@@ -1317,7 +1006,7 @@
13171006 {
13181007 	struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
13191008 
1320
-	if (atomic_dec_and_test(&ctx->refcnt))
1009
+	if (refcount_dec_and_test(&ctx->refcnt))
13211010 		crypto_free_ahash(&tfm->base);
13221011 }
13231012 EXPORT_SYMBOL_GPL(cryptd_free_ahash);
....@@ -1341,7 +1030,7 @@
13411030 	}
13421031 
13431032 	ctx = crypto_aead_ctx(tfm);
1344
-	atomic_set(&ctx->refcnt, 1);
1033
+	refcount_set(&ctx->refcnt, 1);
13451034 
13461035 	return __cryptd_aead_cast(tfm);
13471036 }
....@@ -1359,7 +1048,7 @@
13591048 {
13601049 	struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base);
13611050 
1362
-	return atomic_read(&ctx->refcnt) - 1;
1051
+	return refcount_read(&ctx->refcnt) - 1;
13631052 }
13641053 EXPORT_SYMBOL_GPL(cryptd_aead_queued);
13651054 
....@@ -1367,7 +1056,7 @@
13671056 {
13681057 	struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base);
13691058 
1370
-	if (atomic_dec_and_test(&ctx->refcnt))
1059
+	if (refcount_dec_and_test(&ctx->refcnt))
13711060 		crypto_free_aead(&tfm->base);
13721061 }
13731062 EXPORT_SYMBOL_GPL(cryptd_free_aead);
....@@ -1376,19 +1065,31 @@
13761065 {
13771066 	int err;
13781067 
1068
+	cryptd_wq = alloc_workqueue("cryptd", WQ_MEM_RECLAIM | WQ_CPU_INTENSIVE,
1069
+				    1);
1070
+	if (!cryptd_wq)
1071
+		return -ENOMEM;
1072
+
13791073 	err = cryptd_init_queue(&queue, cryptd_max_cpu_qlen);
13801074 	if (err)
1381
-		return err;
1075
+		goto err_destroy_wq;
13821076 
13831077 	err = crypto_register_template(&cryptd_tmpl);
13841078 	if (err)
1385
-		cryptd_fini_queue(&queue);
1079
+		goto err_fini_queue;
13861080 
1081
+	return 0;
1082
+
1083
+err_fini_queue:
1084
+	cryptd_fini_queue(&queue);
1085
+err_destroy_wq:
1086
+	destroy_workqueue(cryptd_wq);
13871087 	return err;
13881088 }
13891089 
13901090 static void __exit cryptd_exit(void)
13911091 {
1092
+	destroy_workqueue(cryptd_wq);
13921093 	cryptd_fini_queue(&queue);
13931094 	crypto_unregister_template(&cryptd_tmpl);
13941095 }