Linux Audio

Check our new training course

Loading...
v3.15
 
  1/*
  2 * pcrypt - Parallel crypto wrapper.
  3 *
  4 * Copyright (C) 2009 secunet Security Networks AG
  5 * Copyright (C) 2009 Steffen Klassert <steffen.klassert@secunet.com>
  6 *
  7 * This program is free software; you can redistribute it and/or modify it
  8 * under the terms and conditions of the GNU General Public License,
  9 * version 2, as published by the Free Software Foundation.
 10 *
 11 * This program is distributed in the hope it will be useful, but WITHOUT
 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 14 * more details.
 15 *
 16 * You should have received a copy of the GNU General Public License along with
 17 * this program; if not, write to the Free Software Foundation, Inc.,
 18 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
 19 */
 20
 21#include <crypto/algapi.h>
 22#include <crypto/internal/aead.h>
 
 23#include <linux/err.h>
 24#include <linux/init.h>
 25#include <linux/module.h>
 26#include <linux/slab.h>
 27#include <linux/notifier.h>
 28#include <linux/kobject.h>
 29#include <linux/cpu.h>
 30#include <crypto/pcrypt.h>
 31
 32struct padata_pcrypt {
 33	struct padata_instance *pinst;
 34	struct workqueue_struct *wq;
 35
 36	/*
 37	 * Cpumask for callback CPUs. It should be
 38	 * equal to serial cpumask of corresponding padata instance,
 39	 * so it is updated when padata notifies us about serial
 40	 * cpumask change.
 41	 *
 42	 * cb_cpumask is protected by RCU. This fact prevents us from
 43	 * using cpumask_var_t directly because the actual type of
 44	 * cpumsak_var_t depends on kernel configuration(particularly on
 45	 * CONFIG_CPUMASK_OFFSTACK macro). Depending on the configuration
 46	 * cpumask_var_t may be either a pointer to the struct cpumask
 47	 * or a variable allocated on the stack. Thus we can not safely use
 48	 * cpumask_var_t with RCU operations such as rcu_assign_pointer or
 49	 * rcu_dereference. So cpumask_var_t is wrapped with struct
 50	 * pcrypt_cpumask which makes possible to use it with RCU.
 51	 */
 52	struct pcrypt_cpumask {
 53		cpumask_var_t mask;
 54	} *cb_cpumask;
 55	struct notifier_block nblock;
 56};
 57
 58static struct padata_pcrypt pencrypt;
 59static struct padata_pcrypt pdecrypt;
 60static struct kset           *pcrypt_kset;
 61
 62struct pcrypt_instance_ctx {
 63	struct crypto_spawn spawn;
 64	unsigned int tfm_count;
 65};
 66
 67struct pcrypt_aead_ctx {
 68	struct crypto_aead *child;
 69	unsigned int cb_cpu;
 70};
 71
 72static int pcrypt_do_parallel(struct padata_priv *padata, unsigned int *cb_cpu,
 73			      struct padata_pcrypt *pcrypt)
 74{
 75	unsigned int cpu_index, cpu, i;
 76	struct pcrypt_cpumask *cpumask;
 77
 78	cpu = *cb_cpu;
 79
 80	rcu_read_lock_bh();
 81	cpumask = rcu_dereference_bh(pcrypt->cb_cpumask);
 82	if (cpumask_test_cpu(cpu, cpumask->mask))
 83			goto out;
 84
 85	if (!cpumask_weight(cpumask->mask))
 86			goto out;
 87
 88	cpu_index = cpu % cpumask_weight(cpumask->mask);
 89
 90	cpu = cpumask_first(cpumask->mask);
 91	for (i = 0; i < cpu_index; i++)
 92		cpu = cpumask_next(cpu, cpumask->mask);
 93
 94	*cb_cpu = cpu;
 95
 96out:
 97	rcu_read_unlock_bh();
 98	return padata_do_parallel(pcrypt->pinst, padata, cpu);
 99}
100
101static int pcrypt_aead_setkey(struct crypto_aead *parent,
102			      const u8 *key, unsigned int keylen)
103{
104	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(parent);
105
106	return crypto_aead_setkey(ctx->child, key, keylen);
107}
108
109static int pcrypt_aead_setauthsize(struct crypto_aead *parent,
110				   unsigned int authsize)
111{
112	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(parent);
113
114	return crypto_aead_setauthsize(ctx->child, authsize);
115}
116
117static void pcrypt_aead_serial(struct padata_priv *padata)
118{
119	struct pcrypt_request *preq = pcrypt_padata_request(padata);
120	struct aead_request *req = pcrypt_request_ctx(preq);
121
122	aead_request_complete(req->base.data, padata->info);
123}
124
125static void pcrypt_aead_giv_serial(struct padata_priv *padata)
126{
127	struct pcrypt_request *preq = pcrypt_padata_request(padata);
128	struct aead_givcrypt_request *req = pcrypt_request_ctx(preq);
129
130	aead_request_complete(req->areq.base.data, padata->info);
131}
132
133static void pcrypt_aead_done(struct crypto_async_request *areq, int err)
134{
135	struct aead_request *req = areq->data;
136	struct pcrypt_request *preq = aead_request_ctx(req);
137	struct padata_priv *padata = pcrypt_request_padata(preq);
138
139	padata->info = err;
140	req->base.flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
141
142	padata_do_serial(padata);
143}
144
145static void pcrypt_aead_enc(struct padata_priv *padata)
146{
147	struct pcrypt_request *preq = pcrypt_padata_request(padata);
148	struct aead_request *req = pcrypt_request_ctx(preq);
149
150	padata->info = crypto_aead_encrypt(req);
151
152	if (padata->info == -EINPROGRESS)
153		return;
154
155	padata_do_serial(padata);
156}
157
158static int pcrypt_aead_encrypt(struct aead_request *req)
159{
160	int err;
161	struct pcrypt_request *preq = aead_request_ctx(req);
162	struct aead_request *creq = pcrypt_request_ctx(preq);
163	struct padata_priv *padata = pcrypt_request_padata(preq);
164	struct crypto_aead *aead = crypto_aead_reqtfm(req);
165	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(aead);
166	u32 flags = aead_request_flags(req);
167
168	memset(padata, 0, sizeof(struct padata_priv));
169
170	padata->parallel = pcrypt_aead_enc;
171	padata->serial = pcrypt_aead_serial;
172
173	aead_request_set_tfm(creq, ctx->child);
174	aead_request_set_callback(creq, flags & ~CRYPTO_TFM_REQ_MAY_SLEEP,
175				  pcrypt_aead_done, req);
176	aead_request_set_crypt(creq, req->src, req->dst,
177			       req->cryptlen, req->iv);
178	aead_request_set_assoc(creq, req->assoc, req->assoclen);
179
180	err = pcrypt_do_parallel(padata, &ctx->cb_cpu, &pencrypt);
181	if (!err)
182		return -EINPROGRESS;
183
184	return err;
185}
186
187static void pcrypt_aead_dec(struct padata_priv *padata)
188{
189	struct pcrypt_request *preq = pcrypt_padata_request(padata);
190	struct aead_request *req = pcrypt_request_ctx(preq);
191
192	padata->info = crypto_aead_decrypt(req);
193
194	if (padata->info == -EINPROGRESS)
195		return;
196
197	padata_do_serial(padata);
198}
199
200static int pcrypt_aead_decrypt(struct aead_request *req)
201{
202	int err;
203	struct pcrypt_request *preq = aead_request_ctx(req);
204	struct aead_request *creq = pcrypt_request_ctx(preq);
205	struct padata_priv *padata = pcrypt_request_padata(preq);
206	struct crypto_aead *aead = crypto_aead_reqtfm(req);
207	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(aead);
208	u32 flags = aead_request_flags(req);
209
210	memset(padata, 0, sizeof(struct padata_priv));
211
212	padata->parallel = pcrypt_aead_dec;
213	padata->serial = pcrypt_aead_serial;
214
215	aead_request_set_tfm(creq, ctx->child);
216	aead_request_set_callback(creq, flags & ~CRYPTO_TFM_REQ_MAY_SLEEP,
217				  pcrypt_aead_done, req);
218	aead_request_set_crypt(creq, req->src, req->dst,
219			       req->cryptlen, req->iv);
220	aead_request_set_assoc(creq, req->assoc, req->assoclen);
221
222	err = pcrypt_do_parallel(padata, &ctx->cb_cpu, &pdecrypt);
223	if (!err)
224		return -EINPROGRESS;
225
226	return err;
227}
228
229static void pcrypt_aead_givenc(struct padata_priv *padata)
230{
231	struct pcrypt_request *preq = pcrypt_padata_request(padata);
232	struct aead_givcrypt_request *req = pcrypt_request_ctx(preq);
233
234	padata->info = crypto_aead_givencrypt(req);
235
236	if (padata->info == -EINPROGRESS)
237		return;
238
239	padata_do_serial(padata);
240}
241
242static int pcrypt_aead_givencrypt(struct aead_givcrypt_request *req)
243{
244	int err;
245	struct aead_request *areq = &req->areq;
246	struct pcrypt_request *preq = aead_request_ctx(areq);
247	struct aead_givcrypt_request *creq = pcrypt_request_ctx(preq);
248	struct padata_priv *padata = pcrypt_request_padata(preq);
249	struct crypto_aead *aead = aead_givcrypt_reqtfm(req);
250	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(aead);
251	u32 flags = aead_request_flags(areq);
252
253	memset(padata, 0, sizeof(struct padata_priv));
254
255	padata->parallel = pcrypt_aead_givenc;
256	padata->serial = pcrypt_aead_giv_serial;
257
258	aead_givcrypt_set_tfm(creq, ctx->child);
259	aead_givcrypt_set_callback(creq, flags & ~CRYPTO_TFM_REQ_MAY_SLEEP,
260				   pcrypt_aead_done, areq);
261	aead_givcrypt_set_crypt(creq, areq->src, areq->dst,
262				areq->cryptlen, areq->iv);
263	aead_givcrypt_set_assoc(creq, areq->assoc, areq->assoclen);
264	aead_givcrypt_set_giv(creq, req->giv, req->seq);
265
266	err = pcrypt_do_parallel(padata, &ctx->cb_cpu, &pencrypt);
267	if (!err)
268		return -EINPROGRESS;
269
270	return err;
271}
272
273static int pcrypt_aead_init_tfm(struct crypto_tfm *tfm)
274{
275	int cpu, cpu_index;
276	struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
277	struct pcrypt_instance_ctx *ictx = crypto_instance_ctx(inst);
278	struct pcrypt_aead_ctx *ctx = crypto_tfm_ctx(tfm);
279	struct crypto_aead *cipher;
280
281	ictx->tfm_count++;
282
283	cpu_index = ictx->tfm_count % cpumask_weight(cpu_online_mask);
284
285	ctx->cb_cpu = cpumask_first(cpu_online_mask);
286	for (cpu = 0; cpu < cpu_index; cpu++)
287		ctx->cb_cpu = cpumask_next(ctx->cb_cpu, cpu_online_mask);
288
289	cipher = crypto_spawn_aead(crypto_instance_ctx(inst));
290
291	if (IS_ERR(cipher))
292		return PTR_ERR(cipher);
293
294	ctx->child = cipher;
295	tfm->crt_aead.reqsize = sizeof(struct pcrypt_request)
296		+ sizeof(struct aead_givcrypt_request)
297		+ crypto_aead_reqsize(cipher);
298
299	return 0;
300}
301
302static void pcrypt_aead_exit_tfm(struct crypto_tfm *tfm)
303{
304	struct pcrypt_aead_ctx *ctx = crypto_tfm_ctx(tfm);
305
306	crypto_free_aead(ctx->child);
307}
308
309static struct crypto_instance *pcrypt_alloc_instance(struct crypto_alg *alg)
310{
311	struct crypto_instance *inst;
312	struct pcrypt_instance_ctx *ctx;
313	int err;
314
315	inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
316	if (!inst) {
317		inst = ERR_PTR(-ENOMEM);
318		goto out;
319	}
320
321	err = -ENAMETOOLONG;
 
 
322	if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
323		     "pcrypt(%s)", alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
324		goto out_free_inst;
325
326	memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
327
328	ctx = crypto_instance_ctx(inst);
329	err = crypto_init_spawn(&ctx->spawn, alg, inst,
330				CRYPTO_ALG_TYPE_MASK);
331	if (err)
332		goto out_free_inst;
333
334	inst->alg.cra_priority = alg->cra_priority + 100;
335	inst->alg.cra_blocksize = alg->cra_blocksize;
336	inst->alg.cra_alignmask = alg->cra_alignmask;
337
338out:
339	return inst;
340
341out_free_inst:
342	kfree(inst);
343	inst = ERR_PTR(err);
344	goto out;
345}
346
347static struct crypto_instance *pcrypt_alloc_aead(struct rtattr **tb,
348						 u32 type, u32 mask)
349{
350	struct crypto_instance *inst;
351	struct crypto_alg *alg;
 
 
 
 
352
353	alg = crypto_get_attr_alg(tb, type, (mask & CRYPTO_ALG_TYPE_MASK));
354	if (IS_ERR(alg))
355		return ERR_CAST(alg);
356
357	inst = pcrypt_alloc_instance(alg);
358	if (IS_ERR(inst))
359		goto out_put_alg;
360
361	inst->alg.cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC;
362	inst->alg.cra_type = &crypto_aead_type;
 
363
364	inst->alg.cra_aead.ivsize = alg->cra_aead.ivsize;
365	inst->alg.cra_aead.geniv = alg->cra_aead.geniv;
366	inst->alg.cra_aead.maxauthsize = alg->cra_aead.maxauthsize;
367
368	inst->alg.cra_ctxsize = sizeof(struct pcrypt_aead_ctx);
 
 
369
370	inst->alg.cra_init = pcrypt_aead_init_tfm;
371	inst->alg.cra_exit = pcrypt_aead_exit_tfm;
 
 
372
373	inst->alg.cra_aead.setkey = pcrypt_aead_setkey;
374	inst->alg.cra_aead.setauthsize = pcrypt_aead_setauthsize;
375	inst->alg.cra_aead.encrypt = pcrypt_aead_encrypt;
376	inst->alg.cra_aead.decrypt = pcrypt_aead_decrypt;
377	inst->alg.cra_aead.givencrypt = pcrypt_aead_givencrypt;
378
379out_put_alg:
380	crypto_mod_put(alg);
381	return inst;
382}
383
384static struct crypto_instance *pcrypt_alloc(struct rtattr **tb)
385{
386	struct crypto_attr_type *algt;
387
388	algt = crypto_get_attr_type(tb);
389	if (IS_ERR(algt))
390		return ERR_CAST(algt);
391
392	switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) {
393	case CRYPTO_ALG_TYPE_AEAD:
394		return pcrypt_alloc_aead(tb, algt->type, algt->mask);
395	}
396
397	return ERR_PTR(-EINVAL);
398}
399
400static void pcrypt_free(struct crypto_instance *inst)
401{
402	struct pcrypt_instance_ctx *ctx = crypto_instance_ctx(inst);
403
404	crypto_drop_spawn(&ctx->spawn);
 
 
 
 
 
405	kfree(inst);
 
406}
407
408static int pcrypt_cpumask_change_notify(struct notifier_block *self,
409					unsigned long val, void *data)
410{
411	struct padata_pcrypt *pcrypt;
412	struct pcrypt_cpumask *new_mask, *old_mask;
413	struct padata_cpumask *cpumask = (struct padata_cpumask *)data;
414
415	if (!(val & PADATA_CPU_SERIAL))
416		return 0;
417
418	pcrypt = container_of(self, struct padata_pcrypt, nblock);
419	new_mask = kmalloc(sizeof(*new_mask), GFP_KERNEL);
420	if (!new_mask)
421		return -ENOMEM;
422	if (!alloc_cpumask_var(&new_mask->mask, GFP_KERNEL)) {
423		kfree(new_mask);
424		return -ENOMEM;
425	}
426
427	old_mask = pcrypt->cb_cpumask;
 
 
428
429	cpumask_copy(new_mask->mask, cpumask->cbcpu);
430	rcu_assign_pointer(pcrypt->cb_cpumask, new_mask);
431	synchronize_rcu_bh();
 
432
433	free_cpumask_var(old_mask->mask);
434	kfree(old_mask);
435	return 0;
436}
437
438static int pcrypt_sysfs_add(struct padata_instance *pinst, const char *name)
439{
440	int ret;
441
442	pinst->kobj.kset = pcrypt_kset;
443	ret = kobject_add(&pinst->kobj, NULL, name);
444	if (!ret)
445		kobject_uevent(&pinst->kobj, KOBJ_ADD);
446
447	return ret;
448}
449
450static int pcrypt_init_padata(struct padata_pcrypt *pcrypt,
451			      const char *name)
452{
453	int ret = -ENOMEM;
454	struct pcrypt_cpumask *mask;
455
456	get_online_cpus();
457
458	pcrypt->wq = alloc_workqueue("%s", WQ_MEM_RECLAIM | WQ_CPU_INTENSIVE,
459				     1, name);
460	if (!pcrypt->wq)
461		goto err;
462
463	pcrypt->pinst = padata_alloc_possible(pcrypt->wq);
464	if (!pcrypt->pinst)
465		goto err_destroy_workqueue;
466
467	mask = kmalloc(sizeof(*mask), GFP_KERNEL);
468	if (!mask)
469		goto err_free_padata;
470	if (!alloc_cpumask_var(&mask->mask, GFP_KERNEL)) {
471		kfree(mask);
472		goto err_free_padata;
473	}
474
475	cpumask_and(mask->mask, cpu_possible_mask, cpu_online_mask);
476	rcu_assign_pointer(pcrypt->cb_cpumask, mask);
477
478	pcrypt->nblock.notifier_call = pcrypt_cpumask_change_notify;
479	ret = padata_register_cpumask_notifier(pcrypt->pinst, &pcrypt->nblock);
480	if (ret)
481		goto err_free_cpumask;
482
483	ret = pcrypt_sysfs_add(pcrypt->pinst, name);
484	if (ret)
485		goto err_unregister_notifier;
486
487	put_online_cpus();
488
489	return ret;
490
491err_unregister_notifier:
492	padata_unregister_cpumask_notifier(pcrypt->pinst, &pcrypt->nblock);
493err_free_cpumask:
494	free_cpumask_var(mask->mask);
495	kfree(mask);
496err_free_padata:
497	padata_free(pcrypt->pinst);
498err_destroy_workqueue:
499	destroy_workqueue(pcrypt->wq);
500err:
501	put_online_cpus();
502
503	return ret;
504}
505
506static void pcrypt_fini_padata(struct padata_pcrypt *pcrypt)
507{
508	free_cpumask_var(pcrypt->cb_cpumask->mask);
509	kfree(pcrypt->cb_cpumask);
510
511	padata_stop(pcrypt->pinst);
512	padata_unregister_cpumask_notifier(pcrypt->pinst, &pcrypt->nblock);
513	destroy_workqueue(pcrypt->wq);
514	padata_free(pcrypt->pinst);
515}
516
517static struct crypto_template pcrypt_tmpl = {
518	.name = "pcrypt",
519	.alloc = pcrypt_alloc,
520	.free = pcrypt_free,
521	.module = THIS_MODULE,
522};
523
524static int __init pcrypt_init(void)
525{
526	int err = -ENOMEM;
527
528	pcrypt_kset = kset_create_and_add("pcrypt", NULL, kernel_kobj);
529	if (!pcrypt_kset)
530		goto err;
531
532	err = pcrypt_init_padata(&pencrypt, "pencrypt");
533	if (err)
534		goto err_unreg_kset;
535
536	err = pcrypt_init_padata(&pdecrypt, "pdecrypt");
537	if (err)
538		goto err_deinit_pencrypt;
539
540	padata_start(pencrypt.pinst);
541	padata_start(pdecrypt.pinst);
542
543	return crypto_register_template(&pcrypt_tmpl);
544
545err_deinit_pencrypt:
546	pcrypt_fini_padata(&pencrypt);
547err_unreg_kset:
548	kset_unregister(pcrypt_kset);
549err:
550	return err;
551}
552
553static void __exit pcrypt_exit(void)
554{
555	pcrypt_fini_padata(&pencrypt);
556	pcrypt_fini_padata(&pdecrypt);
557
558	kset_unregister(pcrypt_kset);
559	crypto_unregister_template(&pcrypt_tmpl);
560}
561
562module_init(pcrypt_init);
563module_exit(pcrypt_exit);
564
565MODULE_LICENSE("GPL");
566MODULE_AUTHOR("Steffen Klassert <steffen.klassert@secunet.com>");
567MODULE_DESCRIPTION("Parallel crypto wrapper");
v5.4
  1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * pcrypt - Parallel crypto wrapper.
  4 *
  5 * Copyright (C) 2009 secunet Security Networks AG
  6 * Copyright (C) 2009 Steffen Klassert <steffen.klassert@secunet.com>
 
 
 
 
 
 
 
 
 
 
 
 
 
  7 */
  8
  9#include <crypto/algapi.h>
 10#include <crypto/internal/aead.h>
 11#include <linux/atomic.h>
 12#include <linux/err.h>
 13#include <linux/init.h>
 14#include <linux/module.h>
 15#include <linux/slab.h>
 16#include <linux/notifier.h>
 17#include <linux/kobject.h>
 18#include <linux/cpu.h>
 19#include <crypto/pcrypt.h>
 20
 21static struct padata_instance *pencrypt;
 22static struct padata_instance *pdecrypt;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 23static struct kset           *pcrypt_kset;
 24
 25struct pcrypt_instance_ctx {
 26	struct crypto_aead_spawn spawn;
 27	atomic_t tfm_count;
 28};
 29
 30struct pcrypt_aead_ctx {
 31	struct crypto_aead *child;
 32	unsigned int cb_cpu;
 33};
 34
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 35static int pcrypt_aead_setkey(struct crypto_aead *parent,
 36			      const u8 *key, unsigned int keylen)
 37{
 38	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(parent);
 39
 40	return crypto_aead_setkey(ctx->child, key, keylen);
 41}
 42
 43static int pcrypt_aead_setauthsize(struct crypto_aead *parent,
 44				   unsigned int authsize)
 45{
 46	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(parent);
 47
 48	return crypto_aead_setauthsize(ctx->child, authsize);
 49}
 50
 51static void pcrypt_aead_serial(struct padata_priv *padata)
 52{
 53	struct pcrypt_request *preq = pcrypt_padata_request(padata);
 54	struct aead_request *req = pcrypt_request_ctx(preq);
 55
 56	aead_request_complete(req->base.data, padata->info);
 57}
 58
 
 
 
 
 
 
 
 
 59static void pcrypt_aead_done(struct crypto_async_request *areq, int err)
 60{
 61	struct aead_request *req = areq->data;
 62	struct pcrypt_request *preq = aead_request_ctx(req);
 63	struct padata_priv *padata = pcrypt_request_padata(preq);
 64
 65	padata->info = err;
 66	req->base.flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
 67
 68	padata_do_serial(padata);
 69}
 70
 71static void pcrypt_aead_enc(struct padata_priv *padata)
 72{
 73	struct pcrypt_request *preq = pcrypt_padata_request(padata);
 74	struct aead_request *req = pcrypt_request_ctx(preq);
 75
 76	padata->info = crypto_aead_encrypt(req);
 77
 78	if (padata->info == -EINPROGRESS)
 79		return;
 80
 81	padata_do_serial(padata);
 82}
 83
 84static int pcrypt_aead_encrypt(struct aead_request *req)
 85{
 86	int err;
 87	struct pcrypt_request *preq = aead_request_ctx(req);
 88	struct aead_request *creq = pcrypt_request_ctx(preq);
 89	struct padata_priv *padata = pcrypt_request_padata(preq);
 90	struct crypto_aead *aead = crypto_aead_reqtfm(req);
 91	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(aead);
 92	u32 flags = aead_request_flags(req);
 93
 94	memset(padata, 0, sizeof(struct padata_priv));
 95
 96	padata->parallel = pcrypt_aead_enc;
 97	padata->serial = pcrypt_aead_serial;
 98
 99	aead_request_set_tfm(creq, ctx->child);
100	aead_request_set_callback(creq, flags & ~CRYPTO_TFM_REQ_MAY_SLEEP,
101				  pcrypt_aead_done, req);
102	aead_request_set_crypt(creq, req->src, req->dst,
103			       req->cryptlen, req->iv);
104	aead_request_set_ad(creq, req->assoclen);
105
106	err = padata_do_parallel(pencrypt, padata, &ctx->cb_cpu);
107	if (!err)
108		return -EINPROGRESS;
109
110	return err;
111}
112
113static void pcrypt_aead_dec(struct padata_priv *padata)
114{
115	struct pcrypt_request *preq = pcrypt_padata_request(padata);
116	struct aead_request *req = pcrypt_request_ctx(preq);
117
118	padata->info = crypto_aead_decrypt(req);
119
120	if (padata->info == -EINPROGRESS)
121		return;
122
123	padata_do_serial(padata);
124}
125
126static int pcrypt_aead_decrypt(struct aead_request *req)
127{
128	int err;
129	struct pcrypt_request *preq = aead_request_ctx(req);
130	struct aead_request *creq = pcrypt_request_ctx(preq);
131	struct padata_priv *padata = pcrypt_request_padata(preq);
132	struct crypto_aead *aead = crypto_aead_reqtfm(req);
133	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(aead);
134	u32 flags = aead_request_flags(req);
135
136	memset(padata, 0, sizeof(struct padata_priv));
137
138	padata->parallel = pcrypt_aead_dec;
139	padata->serial = pcrypt_aead_serial;
140
141	aead_request_set_tfm(creq, ctx->child);
142	aead_request_set_callback(creq, flags & ~CRYPTO_TFM_REQ_MAY_SLEEP,
143				  pcrypt_aead_done, req);
144	aead_request_set_crypt(creq, req->src, req->dst,
145			       req->cryptlen, req->iv);
146	aead_request_set_ad(creq, req->assoclen);
147
148	err = padata_do_parallel(pdecrypt, padata, &ctx->cb_cpu);
149	if (!err)
150		return -EINPROGRESS;
151
152	return err;
153}
154
155static int pcrypt_aead_init_tfm(struct crypto_aead *tfm)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
156{
157	int cpu, cpu_index;
158	struct aead_instance *inst = aead_alg_instance(tfm);
159	struct pcrypt_instance_ctx *ictx = aead_instance_ctx(inst);
160	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(tfm);
161	struct crypto_aead *cipher;
162
163	cpu_index = (unsigned int)atomic_inc_return(&ictx->tfm_count) %
164		    cpumask_weight(cpu_online_mask);
 
165
166	ctx->cb_cpu = cpumask_first(cpu_online_mask);
167	for (cpu = 0; cpu < cpu_index; cpu++)
168		ctx->cb_cpu = cpumask_next(ctx->cb_cpu, cpu_online_mask);
169
170	cipher = crypto_spawn_aead(&ictx->spawn);
171
172	if (IS_ERR(cipher))
173		return PTR_ERR(cipher);
174
175	ctx->child = cipher;
176	crypto_aead_set_reqsize(tfm, sizeof(struct pcrypt_request) +
177				     sizeof(struct aead_request) +
178				     crypto_aead_reqsize(cipher));
179
180	return 0;
181}
182
183static void pcrypt_aead_exit_tfm(struct crypto_aead *tfm)
184{
185	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(tfm);
186
187	crypto_free_aead(ctx->child);
188}
189
190static void pcrypt_free(struct aead_instance *inst)
191{
192	struct pcrypt_instance_ctx *ctx = aead_instance_ctx(inst);
 
 
193
194	crypto_drop_aead(&ctx->spawn);
195	kfree(inst);
196}
 
 
197
198static int pcrypt_init_instance(struct crypto_instance *inst,
199				struct crypto_alg *alg)
200{
201	if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
202		     "pcrypt(%s)", alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
203		return -ENAMETOOLONG;
204
205	memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
206
 
 
 
 
 
 
207	inst->alg.cra_priority = alg->cra_priority + 100;
208	inst->alg.cra_blocksize = alg->cra_blocksize;
209	inst->alg.cra_alignmask = alg->cra_alignmask;
210
211	return 0;
 
 
 
 
 
 
212}
213
214static int pcrypt_create_aead(struct crypto_template *tmpl, struct rtattr **tb,
215			      u32 type, u32 mask)
216{
217	struct pcrypt_instance_ctx *ctx;
218	struct crypto_attr_type *algt;
219	struct aead_instance *inst;
220	struct aead_alg *alg;
221	const char *name;
222	int err;
223
224	algt = crypto_get_attr_type(tb);
225	if (IS_ERR(algt))
226		return PTR_ERR(algt);
227
228	name = crypto_attr_alg_name(tb[1]);
229	if (IS_ERR(name))
230		return PTR_ERR(name);
231
232	inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
233	if (!inst)
234		return -ENOMEM;
235
236	ctx = aead_instance_ctx(inst);
237	crypto_set_aead_spawn(&ctx->spawn, aead_crypto_instance(inst));
 
238
239	err = crypto_grab_aead(&ctx->spawn, name, 0, 0);
240	if (err)
241		goto out_free_inst;
242
243	alg = crypto_spawn_aead_alg(&ctx->spawn);
244	err = pcrypt_init_instance(aead_crypto_instance(inst), &alg->base);
245	if (err)
246		goto out_drop_aead;
247
248	inst->alg.base.cra_flags = CRYPTO_ALG_ASYNC;
 
 
 
 
249
250	inst->alg.ivsize = crypto_aead_alg_ivsize(alg);
251	inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);
 
 
252
253	inst->alg.base.cra_ctxsize = sizeof(struct pcrypt_aead_ctx);
 
 
254
255	inst->alg.init = pcrypt_aead_init_tfm;
256	inst->alg.exit = pcrypt_aead_exit_tfm;
 
257
258	inst->alg.setkey = pcrypt_aead_setkey;
259	inst->alg.setauthsize = pcrypt_aead_setauthsize;
260	inst->alg.encrypt = pcrypt_aead_encrypt;
261	inst->alg.decrypt = pcrypt_aead_decrypt;
262
263	inst->free = pcrypt_free;
 
264
265	err = aead_register_instance(tmpl, inst);
266	if (err)
267		goto out_drop_aead;
268
269out:
270	return err;
271
272out_drop_aead:
273	crypto_drop_aead(&ctx->spawn);
274out_free_inst:
275	kfree(inst);
276	goto out;
277}
278
279static int pcrypt_create(struct crypto_template *tmpl, struct rtattr **tb)
 
280{
281	struct crypto_attr_type *algt;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
282
283	algt = crypto_get_attr_type(tb);
284	if (IS_ERR(algt))
285		return PTR_ERR(algt);
286
287	switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) {
288	case CRYPTO_ALG_TYPE_AEAD:
289		return pcrypt_create_aead(tmpl, tb, algt->type, algt->mask);
290	}
291
292	return -EINVAL;
 
 
293}
294
295static int pcrypt_sysfs_add(struct padata_instance *pinst, const char *name)
296{
297	int ret;
298
299	pinst->kobj.kset = pcrypt_kset;
300	ret = kobject_add(&pinst->kobj, NULL, "%s", name);
301	if (!ret)
302		kobject_uevent(&pinst->kobj, KOBJ_ADD);
303
304	return ret;
305}
306
307static int pcrypt_init_padata(struct padata_instance **pinst, const char *name)
 
308{
309	int ret = -ENOMEM;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
310
311	*pinst = padata_alloc_possible(name);
312	if (!*pinst)
313		return ret;
 
314
315	ret = pcrypt_sysfs_add(*pinst, name);
316	if (ret)
317		padata_free(*pinst);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
318
319	return ret;
320}
321
322static void pcrypt_fini_padata(struct padata_instance *pinst)
323{
324	padata_stop(pinst);
325	padata_free(pinst);
 
 
 
 
 
326}
327
328static struct crypto_template pcrypt_tmpl = {
329	.name = "pcrypt",
330	.create = pcrypt_create,
 
331	.module = THIS_MODULE,
332};
333
334static int __init pcrypt_init(void)
335{
336	int err = -ENOMEM;
337
338	pcrypt_kset = kset_create_and_add("pcrypt", NULL, kernel_kobj);
339	if (!pcrypt_kset)
340		goto err;
341
342	err = pcrypt_init_padata(&pencrypt, "pencrypt");
343	if (err)
344		goto err_unreg_kset;
345
346	err = pcrypt_init_padata(&pdecrypt, "pdecrypt");
347	if (err)
348		goto err_deinit_pencrypt;
349
350	padata_start(pencrypt);
351	padata_start(pdecrypt);
352
353	return crypto_register_template(&pcrypt_tmpl);
354
355err_deinit_pencrypt:
356	pcrypt_fini_padata(pencrypt);
357err_unreg_kset:
358	kset_unregister(pcrypt_kset);
359err:
360	return err;
361}
362
363static void __exit pcrypt_exit(void)
364{
365	pcrypt_fini_padata(pencrypt);
366	pcrypt_fini_padata(pdecrypt);
367
368	kset_unregister(pcrypt_kset);
369	crypto_unregister_template(&pcrypt_tmpl);
370}
371
372subsys_initcall(pcrypt_init);
373module_exit(pcrypt_exit);
374
375MODULE_LICENSE("GPL");
376MODULE_AUTHOR("Steffen Klassert <steffen.klassert@secunet.com>");
377MODULE_DESCRIPTION("Parallel crypto wrapper");
378MODULE_ALIAS_CRYPTO("pcrypt");