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");

  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/kobject.h>
 17#include <linux/cpu.h>
 18#include <crypto/pcrypt.h>
 19
 20static struct padata_instance *pencrypt;
 21static struct padata_instance *pdecrypt;
 22static struct kset           *pcrypt_kset;
 23
 24struct pcrypt_instance_ctx {
 25	struct crypto_aead_spawn spawn;
 26	struct padata_shell *psenc;
 27	struct padata_shell *psdec;
 28	atomic_t tfm_count;
 29};
 30
 31struct pcrypt_aead_ctx {
 32	struct crypto_aead *child;
 33	unsigned int cb_cpu;
 34};
 35
 36static inline struct pcrypt_instance_ctx *pcrypt_tfm_ictx(
 37	struct crypto_aead *tfm)
 38{
 39	return aead_instance_ctx(aead_alg_instance(tfm));
 40}
 41
 42static int pcrypt_aead_setkey(struct crypto_aead *parent,
 43			      const u8 *key, unsigned int keylen)
 44{
 45	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(parent);
 46
 47	return crypto_aead_setkey(ctx->child, key, keylen);
 48}
 49
 50static int pcrypt_aead_setauthsize(struct crypto_aead *parent,
 51				   unsigned int authsize)
 52{
 53	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(parent);
 54
 55	return crypto_aead_setauthsize(ctx->child, authsize);
 56}
 57
 58static void pcrypt_aead_serial(struct padata_priv *padata)
 59{
 60	struct pcrypt_request *preq = pcrypt_padata_request(padata);
 61	struct aead_request *req = pcrypt_request_ctx(preq);
 62
 63	aead_request_complete(req->base.data, padata->info);
 64}
 65
 66static void pcrypt_aead_done(struct crypto_async_request *areq, int err)
 67{
 68	struct aead_request *req = areq->data;
 69	struct pcrypt_request *preq = aead_request_ctx(req);
 70	struct padata_priv *padata = pcrypt_request_padata(preq);
 71
 72	padata->info = err;
 
 73
 74	padata_do_serial(padata);
 75}
 76
 77static void pcrypt_aead_enc(struct padata_priv *padata)
 78{
 79	struct pcrypt_request *preq = pcrypt_padata_request(padata);
 80	struct aead_request *req = pcrypt_request_ctx(preq);
 81	int ret;
 82
 83	ret = crypto_aead_encrypt(req);
 84
 85	if (ret == -EINPROGRESS)
 86		return;
 87
 88	padata->info = ret;
 89	padata_do_serial(padata);
 90}
 91
 92static int pcrypt_aead_encrypt(struct aead_request *req)
 93{
 94	int err;
 95	struct pcrypt_request *preq = aead_request_ctx(req);
 96	struct aead_request *creq = pcrypt_request_ctx(preq);
 97	struct padata_priv *padata = pcrypt_request_padata(preq);
 98	struct crypto_aead *aead = crypto_aead_reqtfm(req);
 99	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(aead);
100	u32 flags = aead_request_flags(req);
101	struct pcrypt_instance_ctx *ictx;
102
103	ictx = pcrypt_tfm_ictx(aead);
104
105	memset(padata, 0, sizeof(struct padata_priv));
106
107	padata->parallel = pcrypt_aead_enc;
108	padata->serial = pcrypt_aead_serial;
109
110	aead_request_set_tfm(creq, ctx->child);
111	aead_request_set_callback(creq, flags & ~CRYPTO_TFM_REQ_MAY_SLEEP,
112				  pcrypt_aead_done, req);
113	aead_request_set_crypt(creq, req->src, req->dst,
114			       req->cryptlen, req->iv);
115	aead_request_set_ad(creq, req->assoclen);
116
117	err = padata_do_parallel(ictx->psenc, padata, &ctx->cb_cpu);
118	if (!err)
119		return -EINPROGRESS;
120
121	return err;
122}
123
124static void pcrypt_aead_dec(struct padata_priv *padata)
125{
126	struct pcrypt_request *preq = pcrypt_padata_request(padata);
127	struct aead_request *req = pcrypt_request_ctx(preq);
128	int ret;
129
130	ret = crypto_aead_decrypt(req);
131
132	if (ret == -EINPROGRESS)
133		return;
134
135	padata->info = ret;
136	padata_do_serial(padata);
137}
138
139static int pcrypt_aead_decrypt(struct aead_request *req)
140{
141	int err;
142	struct pcrypt_request *preq = aead_request_ctx(req);
143	struct aead_request *creq = pcrypt_request_ctx(preq);
144	struct padata_priv *padata = pcrypt_request_padata(preq);
145	struct crypto_aead *aead = crypto_aead_reqtfm(req);
146	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(aead);
147	u32 flags = aead_request_flags(req);
148	struct pcrypt_instance_ctx *ictx;
149
150	ictx = pcrypt_tfm_ictx(aead);
151
152	memset(padata, 0, sizeof(struct padata_priv));
153
154	padata->parallel = pcrypt_aead_dec;
155	padata->serial = pcrypt_aead_serial;
156
157	aead_request_set_tfm(creq, ctx->child);
158	aead_request_set_callback(creq, flags & ~CRYPTO_TFM_REQ_MAY_SLEEP,
159				  pcrypt_aead_done, req);
160	aead_request_set_crypt(creq, req->src, req->dst,
161			       req->cryptlen, req->iv);
162	aead_request_set_ad(creq, req->assoclen);
163
164	err = padata_do_parallel(ictx->psdec, padata, &ctx->cb_cpu);
165	if (!err)
166		return -EINPROGRESS;
167
168	return err;
169}
170
171static int pcrypt_aead_init_tfm(struct crypto_aead *tfm)
172{
173	int cpu, cpu_index;
174	struct aead_instance *inst = aead_alg_instance(tfm);
175	struct pcrypt_instance_ctx *ictx = aead_instance_ctx(inst);
176	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(tfm);
177	struct crypto_aead *cipher;
178
179	cpu_index = (unsigned int)atomic_inc_return(&ictx->tfm_count) %
180		    cpumask_weight(cpu_online_mask);
181
182	ctx->cb_cpu = cpumask_first(cpu_online_mask);
183	for (cpu = 0; cpu < cpu_index; cpu++)
184		ctx->cb_cpu = cpumask_next(ctx->cb_cpu, cpu_online_mask);
185
186	cipher = crypto_spawn_aead(&ictx->spawn);
187
188	if (IS_ERR(cipher))
189		return PTR_ERR(cipher);
190
191	ctx->child = cipher;
192	crypto_aead_set_reqsize(tfm, sizeof(struct pcrypt_request) +
193				     sizeof(struct aead_request) +
194				     crypto_aead_reqsize(cipher));
195
196	return 0;
197}
198
199static void pcrypt_aead_exit_tfm(struct crypto_aead *tfm)
200{
201	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(tfm);
202
203	crypto_free_aead(ctx->child);
204}
205
206static void pcrypt_free(struct aead_instance *inst)
207{
208	struct pcrypt_instance_ctx *ctx = aead_instance_ctx(inst);
209
210	crypto_drop_aead(&ctx->spawn);
211	padata_free_shell(ctx->psdec);
212	padata_free_shell(ctx->psenc);
213	kfree(inst);
214}
215
216static int pcrypt_init_instance(struct crypto_instance *inst,
217				struct crypto_alg *alg)
218{
219	if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
220		     "pcrypt(%s)", alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
221		return -ENAMETOOLONG;
222
223	memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
224
225	inst->alg.cra_priority = alg->cra_priority + 100;
226	inst->alg.cra_blocksize = alg->cra_blocksize;
227	inst->alg.cra_alignmask = alg->cra_alignmask;
228
229	return 0;
230}
231
232static int pcrypt_create_aead(struct crypto_template *tmpl, struct rtattr **tb,
233			      struct crypto_attr_type *algt)
234{
235	struct pcrypt_instance_ctx *ctx;
 
236	struct aead_instance *inst;
237	struct aead_alg *alg;
238	u32 mask = crypto_algt_inherited_mask(algt);
239	int err;
240
 
 
 
 
 
 
 
 
241	inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
242	if (!inst)
243		return -ENOMEM;
244
245	err = -ENOMEM;
246
247	ctx = aead_instance_ctx(inst);
248	ctx->psenc = padata_alloc_shell(pencrypt);
249	if (!ctx->psenc)
250		goto err_free_inst;
251
252	ctx->psdec = padata_alloc_shell(pdecrypt);
253	if (!ctx->psdec)
254		goto err_free_inst;
255
256	err = crypto_grab_aead(&ctx->spawn, aead_crypto_instance(inst),
257			       crypto_attr_alg_name(tb[1]), 0, mask);
258	if (err)
259		goto err_free_inst;
260
261	alg = crypto_spawn_aead_alg(&ctx->spawn);
262	err = pcrypt_init_instance(aead_crypto_instance(inst), &alg->base);
263	if (err)
264		goto err_free_inst;
265
266	inst->alg.base.cra_flags |= CRYPTO_ALG_ASYNC;
267
268	inst->alg.ivsize = crypto_aead_alg_ivsize(alg);
269	inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);
270
271	inst->alg.base.cra_ctxsize = sizeof(struct pcrypt_aead_ctx);
272
273	inst->alg.init = pcrypt_aead_init_tfm;
274	inst->alg.exit = pcrypt_aead_exit_tfm;
275
276	inst->alg.setkey = pcrypt_aead_setkey;
277	inst->alg.setauthsize = pcrypt_aead_setauthsize;
278	inst->alg.encrypt = pcrypt_aead_encrypt;
279	inst->alg.decrypt = pcrypt_aead_decrypt;
280
281	inst->free = pcrypt_free;
282
283	err = aead_register_instance(tmpl, inst);
284	if (err) {
285err_free_inst:
286		pcrypt_free(inst);
287	}
288	return err;
 
 
 
 
 
 
289}
290
291static int pcrypt_create(struct crypto_template *tmpl, struct rtattr **tb)
292{
293	struct crypto_attr_type *algt;
294
295	algt = crypto_get_attr_type(tb);
296	if (IS_ERR(algt))
297		return PTR_ERR(algt);
298
299	switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) {
300	case CRYPTO_ALG_TYPE_AEAD:
301		return pcrypt_create_aead(tmpl, tb, algt);
302	}
303
304	return -EINVAL;
305}
306
307static int pcrypt_sysfs_add(struct padata_instance *pinst, const char *name)
308{
309	int ret;
310
311	pinst->kobj.kset = pcrypt_kset;
312	ret = kobject_add(&pinst->kobj, NULL, "%s", name);
313	if (!ret)
314		kobject_uevent(&pinst->kobj, KOBJ_ADD);
315
316	return ret;
317}
318
319static int pcrypt_init_padata(struct padata_instance **pinst, const char *name)
320{
321	int ret = -ENOMEM;
322
323	*pinst = padata_alloc(name);
324	if (!*pinst)
325		return ret;
326
327	ret = pcrypt_sysfs_add(*pinst, name);
328	if (ret)
329		padata_free(*pinst);
330
331	return ret;
332}
333
 
 
 
 
 
 
334static struct crypto_template pcrypt_tmpl = {
335	.name = "pcrypt",
336	.create = pcrypt_create,
337	.module = THIS_MODULE,
338};
339
340static int __init pcrypt_init(void)
341{
342	int err = -ENOMEM;
343
344	pcrypt_kset = kset_create_and_add("pcrypt", NULL, kernel_kobj);
345	if (!pcrypt_kset)
346		goto err;
347
348	err = pcrypt_init_padata(&pencrypt, "pencrypt");
349	if (err)
350		goto err_unreg_kset;
351
352	err = pcrypt_init_padata(&pdecrypt, "pdecrypt");
353	if (err)
354		goto err_deinit_pencrypt;
355
 
 
 
356	return crypto_register_template(&pcrypt_tmpl);
357
358err_deinit_pencrypt:
359	padata_free(pencrypt);
360err_unreg_kset:
361	kset_unregister(pcrypt_kset);
362err:
363	return err;
364}
365
366static void __exit pcrypt_exit(void)
367{
368	crypto_unregister_template(&pcrypt_tmpl);
369
370	padata_free(pencrypt);
371	padata_free(pdecrypt);
372
373	kset_unregister(pcrypt_kset);
 
374}
375
376subsys_initcall(pcrypt_init);
377module_exit(pcrypt_exit);
378
379MODULE_LICENSE("GPL");
380MODULE_AUTHOR("Steffen Klassert <steffen.klassert@secunet.com>");
381MODULE_DESCRIPTION("Parallel crypto wrapper");
382MODULE_ALIAS_CRYPTO("pcrypt");