blob: 85082574c515402581c072e238fefb6b62bc1de8 [file] [log] [blame]
Steffen Klassert5068c7a2010-01-07 15:57:19 +11001/*
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>
Herbert Xua5a22e52015-05-22 20:34:22 +080023#include <linux/atomic.h>
Steffen Klassert5068c7a2010-01-07 15:57:19 +110024#include <linux/err.h>
25#include <linux/init.h>
26#include <linux/module.h>
27#include <linux/slab.h>
Dan Kruchinine15bacb2010-07-14 14:31:57 +040028#include <linux/notifier.h>
Dan Kruchinina3fb1e32010-07-14 14:34:15 +040029#include <linux/kobject.h>
Steffen Klassertd3f64e42010-07-27 07:18:46 +020030#include <linux/cpu.h>
Steffen Klassert5068c7a2010-01-07 15:57:19 +110031#include <crypto/pcrypt.h>
32
Steffen Klassertc57e8422010-07-27 07:16:33 +020033struct padata_pcrypt {
Dan Kruchinine15bacb2010-07-14 14:31:57 +040034 struct padata_instance *pinst;
35 struct workqueue_struct *wq;
36
37 /*
38 * Cpumask for callback CPUs. It should be
39 * equal to serial cpumask of corresponding padata instance,
40 * so it is updated when padata notifies us about serial
41 * cpumask change.
42 *
43 * cb_cpumask is protected by RCU. This fact prevents us from
44 * using cpumask_var_t directly because the actual type of
45 * cpumsak_var_t depends on kernel configuration(particularly on
46 * CONFIG_CPUMASK_OFFSTACK macro). Depending on the configuration
47 * cpumask_var_t may be either a pointer to the struct cpumask
48 * or a variable allocated on the stack. Thus we can not safely use
49 * cpumask_var_t with RCU operations such as rcu_assign_pointer or
50 * rcu_dereference. So cpumask_var_t is wrapped with struct
51 * pcrypt_cpumask which makes possible to use it with RCU.
52 */
53 struct pcrypt_cpumask {
54 cpumask_var_t mask;
55 } *cb_cpumask;
56 struct notifier_block nblock;
57};
58
Steffen Klassertc57e8422010-07-27 07:16:33 +020059static struct padata_pcrypt pencrypt;
60static struct padata_pcrypt pdecrypt;
Dan Kruchinina3fb1e32010-07-14 14:34:15 +040061static struct kset *pcrypt_kset;
Steffen Klassert5068c7a2010-01-07 15:57:19 +110062
63struct pcrypt_instance_ctx {
Herbert Xu66d948e2015-05-21 15:10:58 +080064 struct crypto_aead_spawn spawn;
Herbert Xua5a22e52015-05-22 20:34:22 +080065 atomic_t tfm_count;
Steffen Klassert5068c7a2010-01-07 15:57:19 +110066};
67
68struct pcrypt_aead_ctx {
69 struct crypto_aead *child;
70 unsigned int cb_cpu;
71};
72
73static int pcrypt_do_parallel(struct padata_priv *padata, unsigned int *cb_cpu,
Steffen Klassertc57e8422010-07-27 07:16:33 +020074 struct padata_pcrypt *pcrypt)
Steffen Klassert5068c7a2010-01-07 15:57:19 +110075{
76 unsigned int cpu_index, cpu, i;
Dan Kruchinine15bacb2010-07-14 14:31:57 +040077 struct pcrypt_cpumask *cpumask;
Steffen Klassert5068c7a2010-01-07 15:57:19 +110078
79 cpu = *cb_cpu;
80
Dan Kruchinine15bacb2010-07-14 14:31:57 +040081 rcu_read_lock_bh();
Mathias Krause3110e402013-11-28 19:20:04 +010082 cpumask = rcu_dereference_bh(pcrypt->cb_cpumask);
Dan Kruchinine15bacb2010-07-14 14:31:57 +040083 if (cpumask_test_cpu(cpu, cpumask->mask))
Steffen Klassert5068c7a2010-01-07 15:57:19 +110084 goto out;
85
Steffen Klassertcc74f4b2010-07-20 08:52:20 +020086 if (!cpumask_weight(cpumask->mask))
87 goto out;
88
Dan Kruchinine15bacb2010-07-14 14:31:57 +040089 cpu_index = cpu % cpumask_weight(cpumask->mask);
Steffen Klassert5068c7a2010-01-07 15:57:19 +110090
Dan Kruchinine15bacb2010-07-14 14:31:57 +040091 cpu = cpumask_first(cpumask->mask);
Steffen Klassert5068c7a2010-01-07 15:57:19 +110092 for (i = 0; i < cpu_index; i++)
Dan Kruchinine15bacb2010-07-14 14:31:57 +040093 cpu = cpumask_next(cpu, cpumask->mask);
Steffen Klassert5068c7a2010-01-07 15:57:19 +110094
95 *cb_cpu = cpu;
96
97out:
Dan Kruchinine15bacb2010-07-14 14:31:57 +040098 rcu_read_unlock_bh();
99 return padata_do_parallel(pcrypt->pinst, padata, cpu);
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100100}
101
102static int pcrypt_aead_setkey(struct crypto_aead *parent,
103 const u8 *key, unsigned int keylen)
104{
105 struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(parent);
106
107 return crypto_aead_setkey(ctx->child, key, keylen);
108}
109
110static int pcrypt_aead_setauthsize(struct crypto_aead *parent,
111 unsigned int authsize)
112{
113 struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(parent);
114
115 return crypto_aead_setauthsize(ctx->child, authsize);
116}
117
118static void pcrypt_aead_serial(struct padata_priv *padata)
119{
120 struct pcrypt_request *preq = pcrypt_padata_request(padata);
121 struct aead_request *req = pcrypt_request_ctx(preq);
122
123 aead_request_complete(req->base.data, padata->info);
124}
125
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100126static void pcrypt_aead_done(struct crypto_async_request *areq, int err)
127{
128 struct aead_request *req = areq->data;
129 struct pcrypt_request *preq = aead_request_ctx(req);
130 struct padata_priv *padata = pcrypt_request_padata(preq);
131
132 padata->info = err;
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100133
134 padata_do_serial(padata);
135}
136
137static void pcrypt_aead_enc(struct padata_priv *padata)
138{
139 struct pcrypt_request *preq = pcrypt_padata_request(padata);
140 struct aead_request *req = pcrypt_request_ctx(preq);
141
142 padata->info = crypto_aead_encrypt(req);
143
Steffen Klassert5a1436b2010-02-04 11:40:17 +1100144 if (padata->info == -EINPROGRESS)
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100145 return;
146
147 padata_do_serial(padata);
148}
149
150static int pcrypt_aead_encrypt(struct aead_request *req)
151{
152 int err;
153 struct pcrypt_request *preq = aead_request_ctx(req);
154 struct aead_request *creq = pcrypt_request_ctx(preq);
155 struct padata_priv *padata = pcrypt_request_padata(preq);
156 struct crypto_aead *aead = crypto_aead_reqtfm(req);
157 struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(aead);
158 u32 flags = aead_request_flags(req);
159
160 memset(padata, 0, sizeof(struct padata_priv));
161
162 padata->parallel = pcrypt_aead_enc;
163 padata->serial = pcrypt_aead_serial;
164
165 aead_request_set_tfm(creq, ctx->child);
166 aead_request_set_callback(creq, flags & ~CRYPTO_TFM_REQ_MAY_SLEEP,
167 pcrypt_aead_done, req);
168 aead_request_set_crypt(creq, req->src, req->dst,
169 req->cryptlen, req->iv);
Herbert Xu0496f562015-05-28 22:08:00 +0800170 aead_request_set_ad(creq, req->assoclen);
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100171
Dan Kruchinine15bacb2010-07-14 14:31:57 +0400172 err = pcrypt_do_parallel(padata, &ctx->cb_cpu, &pencrypt);
Steffen Klassert83f619f2010-07-07 15:32:02 +0200173 if (!err)
174 return -EINPROGRESS;
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100175
176 return err;
177}
178
179static void pcrypt_aead_dec(struct padata_priv *padata)
180{
181 struct pcrypt_request *preq = pcrypt_padata_request(padata);
182 struct aead_request *req = pcrypt_request_ctx(preq);
183
184 padata->info = crypto_aead_decrypt(req);
185
Steffen Klassert5a1436b2010-02-04 11:40:17 +1100186 if (padata->info == -EINPROGRESS)
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100187 return;
188
189 padata_do_serial(padata);
190}
191
192static int pcrypt_aead_decrypt(struct aead_request *req)
193{
194 int err;
195 struct pcrypt_request *preq = aead_request_ctx(req);
196 struct aead_request *creq = pcrypt_request_ctx(preq);
197 struct padata_priv *padata = pcrypt_request_padata(preq);
198 struct crypto_aead *aead = crypto_aead_reqtfm(req);
199 struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(aead);
200 u32 flags = aead_request_flags(req);
201
202 memset(padata, 0, sizeof(struct padata_priv));
203
204 padata->parallel = pcrypt_aead_dec;
205 padata->serial = pcrypt_aead_serial;
206
207 aead_request_set_tfm(creq, ctx->child);
208 aead_request_set_callback(creq, flags & ~CRYPTO_TFM_REQ_MAY_SLEEP,
209 pcrypt_aead_done, req);
210 aead_request_set_crypt(creq, req->src, req->dst,
211 req->cryptlen, req->iv);
Herbert Xu0496f562015-05-28 22:08:00 +0800212 aead_request_set_ad(creq, req->assoclen);
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100213
Dan Kruchinine15bacb2010-07-14 14:31:57 +0400214 err = pcrypt_do_parallel(padata, &ctx->cb_cpu, &pdecrypt);
Steffen Klassert83f619f2010-07-07 15:32:02 +0200215 if (!err)
216 return -EINPROGRESS;
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100217
218 return err;
219}
220
Herbert Xu0496f562015-05-28 22:08:00 +0800221static int pcrypt_aead_init_tfm(struct crypto_aead *tfm)
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100222{
223 int cpu, cpu_index;
Herbert Xu0496f562015-05-28 22:08:00 +0800224 struct aead_instance *inst = aead_alg_instance(tfm);
225 struct pcrypt_instance_ctx *ictx = aead_instance_ctx(inst);
226 struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(tfm);
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100227 struct crypto_aead *cipher;
228
Herbert Xua5a22e52015-05-22 20:34:22 +0800229 cpu_index = (unsigned int)atomic_inc_return(&ictx->tfm_count) %
230 cpumask_weight(cpu_online_mask);
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100231
Steffen Klassertfbf0ca12012-03-28 08:51:03 +0200232 ctx->cb_cpu = cpumask_first(cpu_online_mask);
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100233 for (cpu = 0; cpu < cpu_index; cpu++)
Steffen Klassertfbf0ca12012-03-28 08:51:03 +0200234 ctx->cb_cpu = cpumask_next(ctx->cb_cpu, cpu_online_mask);
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100235
Herbert Xu0496f562015-05-28 22:08:00 +0800236 cipher = crypto_spawn_aead(&ictx->spawn);
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100237
238 if (IS_ERR(cipher))
239 return PTR_ERR(cipher);
240
241 ctx->child = cipher;
Herbert Xu0496f562015-05-28 22:08:00 +0800242 crypto_aead_set_reqsize(tfm, sizeof(struct pcrypt_request) +
243 sizeof(struct aead_request) +
244 crypto_aead_reqsize(cipher));
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100245
246 return 0;
247}
248
Herbert Xu0496f562015-05-28 22:08:00 +0800249static void pcrypt_aead_exit_tfm(struct crypto_aead *tfm)
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100250{
Herbert Xu0496f562015-05-28 22:08:00 +0800251 struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(tfm);
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100252
253 crypto_free_aead(ctx->child);
254}
255
Eric Biggersc195a4c2017-12-20 14:28:25 -0800256static void pcrypt_free(struct aead_instance *inst)
257{
258 struct pcrypt_instance_ctx *ctx = aead_instance_ctx(inst);
259
260 crypto_drop_aead(&ctx->spawn);
261 kfree(inst);
262}
263
Herbert Xu66d948e2015-05-21 15:10:58 +0800264static int pcrypt_init_instance(struct crypto_instance *inst,
265 struct crypto_alg *alg)
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100266{
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100267 if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
268 "pcrypt(%s)", alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
Herbert Xu66d948e2015-05-21 15:10:58 +0800269 return -ENAMETOOLONG;
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100270
271 memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
272
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100273 inst->alg.cra_priority = alg->cra_priority + 100;
274 inst->alg.cra_blocksize = alg->cra_blocksize;
275 inst->alg.cra_alignmask = alg->cra_alignmask;
276
Herbert Xu66d948e2015-05-21 15:10:58 +0800277 return 0;
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100278}
279
Herbert Xu0496f562015-05-28 22:08:00 +0800280static int pcrypt_create_aead(struct crypto_template *tmpl, struct rtattr **tb,
281 u32 type, u32 mask)
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100282{
Herbert Xu66d948e2015-05-21 15:10:58 +0800283 struct pcrypt_instance_ctx *ctx;
Herbert Xu846f97d2015-07-09 07:17:18 +0800284 struct crypto_attr_type *algt;
Herbert Xu0496f562015-05-28 22:08:00 +0800285 struct aead_instance *inst;
286 struct aead_alg *alg;
Herbert Xu66d948e2015-05-21 15:10:58 +0800287 const char *name;
288 int err;
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100289
Herbert Xu846f97d2015-07-09 07:17:18 +0800290 algt = crypto_get_attr_type(tb);
291 if (IS_ERR(algt))
292 return PTR_ERR(algt);
293
Herbert Xu66d948e2015-05-21 15:10:58 +0800294 name = crypto_attr_alg_name(tb[1]);
295 if (IS_ERR(name))
Herbert Xu0496f562015-05-28 22:08:00 +0800296 return PTR_ERR(name);
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100297
Herbert Xu66d948e2015-05-21 15:10:58 +0800298 inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
299 if (!inst)
Herbert Xu0496f562015-05-28 22:08:00 +0800300 return -ENOMEM;
Herbert Xu66d948e2015-05-21 15:10:58 +0800301
Herbert Xu0496f562015-05-28 22:08:00 +0800302 ctx = aead_instance_ctx(inst);
303 crypto_set_aead_spawn(&ctx->spawn, aead_crypto_instance(inst));
Herbert Xu66d948e2015-05-21 15:10:58 +0800304
Herbert Xu5e4b8c12015-08-13 17:29:06 +0800305 err = crypto_grab_aead(&ctx->spawn, name, 0, 0);
Herbert Xu66d948e2015-05-21 15:10:58 +0800306 if (err)
307 goto out_free_inst;
308
Herbert Xu0496f562015-05-28 22:08:00 +0800309 alg = crypto_spawn_aead_alg(&ctx->spawn);
310 err = pcrypt_init_instance(aead_crypto_instance(inst), &alg->base);
Herbert Xu66d948e2015-05-21 15:10:58 +0800311 if (err)
312 goto out_drop_aead;
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100313
Herbert Xu846f97d2015-07-09 07:17:18 +0800314 inst->alg.base.cra_flags = CRYPTO_ALG_ASYNC;
Herbert Xu846f97d2015-07-09 07:17:18 +0800315
Herbert Xu0496f562015-05-28 22:08:00 +0800316 inst->alg.ivsize = crypto_aead_alg_ivsize(alg);
317 inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100318
Herbert Xu0496f562015-05-28 22:08:00 +0800319 inst->alg.base.cra_ctxsize = sizeof(struct pcrypt_aead_ctx);
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100320
Herbert Xu0496f562015-05-28 22:08:00 +0800321 inst->alg.init = pcrypt_aead_init_tfm;
322 inst->alg.exit = pcrypt_aead_exit_tfm;
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100323
Herbert Xu0496f562015-05-28 22:08:00 +0800324 inst->alg.setkey = pcrypt_aead_setkey;
325 inst->alg.setauthsize = pcrypt_aead_setauthsize;
326 inst->alg.encrypt = pcrypt_aead_encrypt;
327 inst->alg.decrypt = pcrypt_aead_decrypt;
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100328
Eric Biggersc195a4c2017-12-20 14:28:25 -0800329 inst->free = pcrypt_free;
330
Herbert Xu0496f562015-05-28 22:08:00 +0800331 err = aead_register_instance(tmpl, inst);
332 if (err)
333 goto out_drop_aead;
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100334
Herbert Xu66d948e2015-05-21 15:10:58 +0800335out:
Herbert Xu0496f562015-05-28 22:08:00 +0800336 return err;
Herbert Xu66d948e2015-05-21 15:10:58 +0800337
338out_drop_aead:
339 crypto_drop_aead(&ctx->spawn);
340out_free_inst:
341 kfree(inst);
Herbert Xu66d948e2015-05-21 15:10:58 +0800342 goto out;
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100343}
344
Herbert Xu0496f562015-05-28 22:08:00 +0800345static int pcrypt_create(struct crypto_template *tmpl, struct rtattr **tb)
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100346{
347 struct crypto_attr_type *algt;
348
349 algt = crypto_get_attr_type(tb);
350 if (IS_ERR(algt))
Herbert Xu0496f562015-05-28 22:08:00 +0800351 return PTR_ERR(algt);
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100352
353 switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) {
354 case CRYPTO_ALG_TYPE_AEAD:
Herbert Xu0496f562015-05-28 22:08:00 +0800355 return pcrypt_create_aead(tmpl, tb, algt->type, algt->mask);
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100356 }
357
Herbert Xu0496f562015-05-28 22:08:00 +0800358 return -EINVAL;
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100359}
360
Dan Kruchinine15bacb2010-07-14 14:31:57 +0400361static int pcrypt_cpumask_change_notify(struct notifier_block *self,
362 unsigned long val, void *data)
363{
Steffen Klassertc57e8422010-07-27 07:16:33 +0200364 struct padata_pcrypt *pcrypt;
Dan Kruchinine15bacb2010-07-14 14:31:57 +0400365 struct pcrypt_cpumask *new_mask, *old_mask;
Steffen Klassertd3f64e42010-07-27 07:18:46 +0200366 struct padata_cpumask *cpumask = (struct padata_cpumask *)data;
Dan Kruchinine15bacb2010-07-14 14:31:57 +0400367
368 if (!(val & PADATA_CPU_SERIAL))
369 return 0;
370
Steffen Klassertc57e8422010-07-27 07:16:33 +0200371 pcrypt = container_of(self, struct padata_pcrypt, nblock);
Dan Kruchinine15bacb2010-07-14 14:31:57 +0400372 new_mask = kmalloc(sizeof(*new_mask), GFP_KERNEL);
373 if (!new_mask)
374 return -ENOMEM;
375 if (!alloc_cpumask_var(&new_mask->mask, GFP_KERNEL)) {
376 kfree(new_mask);
377 return -ENOMEM;
378 }
379
380 old_mask = pcrypt->cb_cpumask;
381
Steffen Klassertd3f64e42010-07-27 07:18:46 +0200382 cpumask_copy(new_mask->mask, cpumask->cbcpu);
Dan Kruchinine15bacb2010-07-14 14:31:57 +0400383 rcu_assign_pointer(pcrypt->cb_cpumask, new_mask);
384 synchronize_rcu_bh();
385
386 free_cpumask_var(old_mask->mask);
387 kfree(old_mask);
388 return 0;
389}
390
Dan Kruchinina3fb1e32010-07-14 14:34:15 +0400391static int pcrypt_sysfs_add(struct padata_instance *pinst, const char *name)
392{
393 int ret;
394
395 pinst->kobj.kset = pcrypt_kset;
Colin Ian Kinga3f01dc2018-10-27 15:49:26 +0100396 ret = kobject_add(&pinst->kobj, NULL, "%s", name);
Dan Kruchinina3fb1e32010-07-14 14:34:15 +0400397 if (!ret)
398 kobject_uevent(&pinst->kobj, KOBJ_ADD);
399
400 return ret;
401}
402
Steffen Klassertc57e8422010-07-27 07:16:33 +0200403static int pcrypt_init_padata(struct padata_pcrypt *pcrypt,
404 const char *name)
Dan Kruchinine15bacb2010-07-14 14:31:57 +0400405{
406 int ret = -ENOMEM;
407 struct pcrypt_cpumask *mask;
408
Steffen Klassertd3f64e42010-07-27 07:18:46 +0200409 get_online_cpus();
410
Kees Cookd8537542013-07-03 15:04:57 -0700411 pcrypt->wq = alloc_workqueue("%s", WQ_MEM_RECLAIM | WQ_CPU_INTENSIVE,
412 1, name);
Dan Kruchinine15bacb2010-07-14 14:31:57 +0400413 if (!pcrypt->wq)
414 goto err;
415
Steffen Klasserte6cc1172010-07-27 07:14:28 +0200416 pcrypt->pinst = padata_alloc_possible(pcrypt->wq);
Dan Kruchinine15bacb2010-07-14 14:31:57 +0400417 if (!pcrypt->pinst)
418 goto err_destroy_workqueue;
419
420 mask = kmalloc(sizeof(*mask), GFP_KERNEL);
421 if (!mask)
422 goto err_free_padata;
423 if (!alloc_cpumask_var(&mask->mask, GFP_KERNEL)) {
424 kfree(mask);
425 goto err_free_padata;
426 }
427
Steffen Klassertfbf0ca12012-03-28 08:51:03 +0200428 cpumask_and(mask->mask, cpu_possible_mask, cpu_online_mask);
Dan Kruchinine15bacb2010-07-14 14:31:57 +0400429 rcu_assign_pointer(pcrypt->cb_cpumask, mask);
430
431 pcrypt->nblock.notifier_call = pcrypt_cpumask_change_notify;
432 ret = padata_register_cpumask_notifier(pcrypt->pinst, &pcrypt->nblock);
433 if (ret)
434 goto err_free_cpumask;
435
Dan Kruchinina3fb1e32010-07-14 14:34:15 +0400436 ret = pcrypt_sysfs_add(pcrypt->pinst, name);
437 if (ret)
438 goto err_unregister_notifier;
439
Steffen Klassertd3f64e42010-07-27 07:18:46 +0200440 put_online_cpus();
441
Dan Kruchinine15bacb2010-07-14 14:31:57 +0400442 return ret;
Steffen Klassertd3f64e42010-07-27 07:18:46 +0200443
Dan Kruchinina3fb1e32010-07-14 14:34:15 +0400444err_unregister_notifier:
445 padata_unregister_cpumask_notifier(pcrypt->pinst, &pcrypt->nblock);
Dan Kruchinine15bacb2010-07-14 14:31:57 +0400446err_free_cpumask:
447 free_cpumask_var(mask->mask);
448 kfree(mask);
449err_free_padata:
450 padata_free(pcrypt->pinst);
451err_destroy_workqueue:
452 destroy_workqueue(pcrypt->wq);
453err:
Steffen Klassertd3f64e42010-07-27 07:18:46 +0200454 put_online_cpus();
455
Dan Kruchinine15bacb2010-07-14 14:31:57 +0400456 return ret;
457}
458
Steffen Klassertc57e8422010-07-27 07:16:33 +0200459static void pcrypt_fini_padata(struct padata_pcrypt *pcrypt)
Dan Kruchinine15bacb2010-07-14 14:31:57 +0400460{
461 free_cpumask_var(pcrypt->cb_cpumask->mask);
462 kfree(pcrypt->cb_cpumask);
463
464 padata_stop(pcrypt->pinst);
465 padata_unregister_cpumask_notifier(pcrypt->pinst, &pcrypt->nblock);
466 destroy_workqueue(pcrypt->wq);
467 padata_free(pcrypt->pinst);
468}
469
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100470static struct crypto_template pcrypt_tmpl = {
471 .name = "pcrypt",
Herbert Xu0496f562015-05-28 22:08:00 +0800472 .create = pcrypt_create,
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100473 .module = THIS_MODULE,
474};
475
476static int __init pcrypt_init(void)
477{
Dan Kruchinina3fb1e32010-07-14 14:34:15 +0400478 int err = -ENOMEM;
479
480 pcrypt_kset = kset_create_and_add("pcrypt", NULL, kernel_kobj);
481 if (!pcrypt_kset)
482 goto err;
Dan Kruchinine15bacb2010-07-14 14:31:57 +0400483
Steffen Klassertc57e8422010-07-27 07:16:33 +0200484 err = pcrypt_init_padata(&pencrypt, "pencrypt");
Dan Kruchinine15bacb2010-07-14 14:31:57 +0400485 if (err)
Dan Kruchinina3fb1e32010-07-14 14:34:15 +0400486 goto err_unreg_kset;
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100487
Steffen Klassertc57e8422010-07-27 07:16:33 +0200488 err = pcrypt_init_padata(&pdecrypt, "pdecrypt");
Steffen Klassert4c879172010-07-07 15:30:10 +0200489 if (err)
Dan Kruchinine15bacb2010-07-14 14:31:57 +0400490 goto err_deinit_pencrypt;
Steffen Klassert4c879172010-07-07 15:30:10 +0200491
Dan Kruchinine15bacb2010-07-14 14:31:57 +0400492 padata_start(pencrypt.pinst);
493 padata_start(pdecrypt.pinst);
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100494
495 return crypto_register_template(&pcrypt_tmpl);
496
Dan Kruchinine15bacb2010-07-14 14:31:57 +0400497err_deinit_pencrypt:
Steffen Klassertc57e8422010-07-27 07:16:33 +0200498 pcrypt_fini_padata(&pencrypt);
Dan Kruchinina3fb1e32010-07-14 14:34:15 +0400499err_unreg_kset:
500 kset_unregister(pcrypt_kset);
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100501err:
Steffen Klassert4c879172010-07-07 15:30:10 +0200502 return err;
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100503}
504
505static void __exit pcrypt_exit(void)
506{
Herbert Xub814f7f2019-11-19 17:41:31 +0800507 crypto_unregister_template(&pcrypt_tmpl);
508
Steffen Klassertc57e8422010-07-27 07:16:33 +0200509 pcrypt_fini_padata(&pencrypt);
510 pcrypt_fini_padata(&pdecrypt);
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100511
Dan Kruchinina3fb1e32010-07-14 14:34:15 +0400512 kset_unregister(pcrypt_kset);
Steffen Klassert5068c7a2010-01-07 15:57:19 +1100513}
514
515module_init(pcrypt_init);
516module_exit(pcrypt_exit);
517
518MODULE_LICENSE("GPL");
519MODULE_AUTHOR("Steffen Klassert <steffen.klassert@secunet.com>");
520MODULE_DESCRIPTION("Parallel crypto wrapper");
Kees Cook4943ba12014-11-24 16:32:38 -0800521MODULE_ALIAS_CRYPTO("pcrypt");