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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(void *data, int err)
67{
68 struct aead_request *req = 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 if (err == -EBUSY) {
121 /* try non-parallel mode */
122 return crypto_aead_encrypt(creq);
123 }
124
125 return err;
126}
127
128static void pcrypt_aead_dec(struct padata_priv *padata)
129{
130 struct pcrypt_request *preq = pcrypt_padata_request(padata);
131 struct aead_request *req = pcrypt_request_ctx(preq);
132 int ret;
133
134 ret = crypto_aead_decrypt(req);
135
136 if (ret == -EINPROGRESS)
137 return;
138
139 padata->info = ret;
140 padata_do_serial(padata);
141}
142
143static int pcrypt_aead_decrypt(struct aead_request *req)
144{
145 int err;
146 struct pcrypt_request *preq = aead_request_ctx(req);
147 struct aead_request *creq = pcrypt_request_ctx(preq);
148 struct padata_priv *padata = pcrypt_request_padata(preq);
149 struct crypto_aead *aead = crypto_aead_reqtfm(req);
150 struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(aead);
151 u32 flags = aead_request_flags(req);
152 struct pcrypt_instance_ctx *ictx;
153
154 ictx = pcrypt_tfm_ictx(aead);
155
156 memset(padata, 0, sizeof(struct padata_priv));
157
158 padata->parallel = pcrypt_aead_dec;
159 padata->serial = pcrypt_aead_serial;
160
161 aead_request_set_tfm(creq, ctx->child);
162 aead_request_set_callback(creq, flags & ~CRYPTO_TFM_REQ_MAY_SLEEP,
163 pcrypt_aead_done, req);
164 aead_request_set_crypt(creq, req->src, req->dst,
165 req->cryptlen, req->iv);
166 aead_request_set_ad(creq, req->assoclen);
167
168 err = padata_do_parallel(ictx->psdec, padata, &ctx->cb_cpu);
169 if (!err)
170 return -EINPROGRESS;
171 if (err == -EBUSY) {
172 /* try non-parallel mode */
173 return crypto_aead_decrypt(creq);
174 }
175
176 return err;
177}
178
179static int pcrypt_aead_init_tfm(struct crypto_aead *tfm)
180{
181 int cpu, cpu_index;
182 struct aead_instance *inst = aead_alg_instance(tfm);
183 struct pcrypt_instance_ctx *ictx = aead_instance_ctx(inst);
184 struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(tfm);
185 struct crypto_aead *cipher;
186
187 cpu_index = (unsigned int)atomic_inc_return(&ictx->tfm_count) %
188 cpumask_weight(cpu_online_mask);
189
190 ctx->cb_cpu = cpumask_first(cpu_online_mask);
191 for (cpu = 0; cpu < cpu_index; cpu++)
192 ctx->cb_cpu = cpumask_next(ctx->cb_cpu, cpu_online_mask);
193
194 cipher = crypto_spawn_aead(&ictx->spawn);
195
196 if (IS_ERR(cipher))
197 return PTR_ERR(cipher);
198
199 ctx->child = cipher;
200 crypto_aead_set_reqsize(tfm, sizeof(struct pcrypt_request) +
201 sizeof(struct aead_request) +
202 crypto_aead_reqsize(cipher));
203
204 return 0;
205}
206
207static void pcrypt_aead_exit_tfm(struct crypto_aead *tfm)
208{
209 struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(tfm);
210
211 crypto_free_aead(ctx->child);
212}
213
214static void pcrypt_free(struct aead_instance *inst)
215{
216 struct pcrypt_instance_ctx *ctx = aead_instance_ctx(inst);
217
218 crypto_drop_aead(&ctx->spawn);
219 padata_free_shell(ctx->psdec);
220 padata_free_shell(ctx->psenc);
221 kfree(inst);
222}
223
224static int pcrypt_init_instance(struct crypto_instance *inst,
225 struct crypto_alg *alg)
226{
227 if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
228 "pcrypt(%s)", alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
229 return -ENAMETOOLONG;
230
231 memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
232
233 inst->alg.cra_priority = alg->cra_priority + 100;
234 inst->alg.cra_blocksize = alg->cra_blocksize;
235 inst->alg.cra_alignmask = alg->cra_alignmask;
236
237 return 0;
238}
239
240static int pcrypt_create_aead(struct crypto_template *tmpl, struct rtattr **tb,
241 struct crypto_attr_type *algt)
242{
243 struct pcrypt_instance_ctx *ctx;
244 struct aead_instance *inst;
245 struct aead_alg *alg;
246 u32 mask = crypto_algt_inherited_mask(algt);
247 int err;
248
249 inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
250 if (!inst)
251 return -ENOMEM;
252
253 err = -ENOMEM;
254
255 ctx = aead_instance_ctx(inst);
256 ctx->psenc = padata_alloc_shell(pencrypt);
257 if (!ctx->psenc)
258 goto err_free_inst;
259
260 ctx->psdec = padata_alloc_shell(pdecrypt);
261 if (!ctx->psdec)
262 goto err_free_inst;
263
264 err = crypto_grab_aead(&ctx->spawn, aead_crypto_instance(inst),
265 crypto_attr_alg_name(tb[1]), 0, mask);
266 if (err)
267 goto err_free_inst;
268
269 alg = crypto_spawn_aead_alg(&ctx->spawn);
270 err = pcrypt_init_instance(aead_crypto_instance(inst), &alg->base);
271 if (err)
272 goto err_free_inst;
273
274 inst->alg.base.cra_flags |= CRYPTO_ALG_ASYNC;
275
276 inst->alg.ivsize = crypto_aead_alg_ivsize(alg);
277 inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);
278
279 inst->alg.base.cra_ctxsize = sizeof(struct pcrypt_aead_ctx);
280
281 inst->alg.init = pcrypt_aead_init_tfm;
282 inst->alg.exit = pcrypt_aead_exit_tfm;
283
284 inst->alg.setkey = pcrypt_aead_setkey;
285 inst->alg.setauthsize = pcrypt_aead_setauthsize;
286 inst->alg.encrypt = pcrypt_aead_encrypt;
287 inst->alg.decrypt = pcrypt_aead_decrypt;
288
289 inst->free = pcrypt_free;
290
291 err = aead_register_instance(tmpl, inst);
292 if (err) {
293err_free_inst:
294 pcrypt_free(inst);
295 }
296 return err;
297}
298
299static int pcrypt_create(struct crypto_template *tmpl, struct rtattr **tb)
300{
301 struct crypto_attr_type *algt;
302
303 algt = crypto_get_attr_type(tb);
304 if (IS_ERR(algt))
305 return PTR_ERR(algt);
306
307 switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) {
308 case CRYPTO_ALG_TYPE_AEAD:
309 return pcrypt_create_aead(tmpl, tb, algt);
310 }
311
312 return -EINVAL;
313}
314
315static int pcrypt_sysfs_add(struct padata_instance *pinst, const char *name)
316{
317 int ret;
318
319 pinst->kobj.kset = pcrypt_kset;
320 ret = kobject_add(&pinst->kobj, NULL, "%s", name);
321 if (!ret)
322 kobject_uevent(&pinst->kobj, KOBJ_ADD);
323
324 return ret;
325}
326
327static int pcrypt_init_padata(struct padata_instance **pinst, const char *name)
328{
329 int ret = -ENOMEM;
330
331 *pinst = padata_alloc(name);
332 if (!*pinst)
333 return ret;
334
335 ret = pcrypt_sysfs_add(*pinst, name);
336 if (ret)
337 padata_free(*pinst);
338
339 return ret;
340}
341
342static struct crypto_template pcrypt_tmpl = {
343 .name = "pcrypt",
344 .create = pcrypt_create,
345 .module = THIS_MODULE,
346};
347
348static int __init pcrypt_init(void)
349{
350 int err = -ENOMEM;
351
352 pcrypt_kset = kset_create_and_add("pcrypt", NULL, kernel_kobj);
353 if (!pcrypt_kset)
354 goto err;
355
356 err = pcrypt_init_padata(&pencrypt, "pencrypt");
357 if (err)
358 goto err_unreg_kset;
359
360 err = pcrypt_init_padata(&pdecrypt, "pdecrypt");
361 if (err)
362 goto err_deinit_pencrypt;
363
364 return crypto_register_template(&pcrypt_tmpl);
365
366err_deinit_pencrypt:
367 padata_free(pencrypt);
368err_unreg_kset:
369 kset_unregister(pcrypt_kset);
370err:
371 return err;
372}
373
374static void __exit pcrypt_exit(void)
375{
376 crypto_unregister_template(&pcrypt_tmpl);
377
378 padata_free(pencrypt);
379 padata_free(pdecrypt);
380
381 kset_unregister(pcrypt_kset);
382}
383
384subsys_initcall(pcrypt_init);
385module_exit(pcrypt_exit);
386
387MODULE_LICENSE("GPL");
388MODULE_AUTHOR("Steffen Klassert <steffen.klassert@secunet.com>");
389MODULE_DESCRIPTION("Parallel crypto wrapper");
390MODULE_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/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");