mirror of
https://github.com/torvalds/linux.git
synced 2024-11-25 13:41:51 +00:00
crypto: pcrypt - Add pcrypt crypto parallelization wrapper
This patch adds a parallel crypto template that takes a crypto algorithm and converts it to process the crypto transforms in parallel. For the moment only aead algorithms are supported. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Steffen Klassert
Herbert Xu
parent
16295bec63
commit
5068c7a883
@ -114,6 +114,16 @@ config CRYPTO_NULL
|
||||
help
|
||||
These are 'Null' algorithms, used by IPsec, which do nothing.
|
||||
|
||||
config CRYPTO_PCRYPT
|
||||
tristate "Parallel crypto engine (EXPERIMENTAL)"
|
||||
depends on SMP && EXPERIMENTAL
|
||||
select PADATA
|
||||
select CRYPTO_MANAGER
|
||||
select CRYPTO_AEAD
|
||||
help
|
||||
This converts an arbitrary crypto algorithm into a parallel
|
||||
algorithm that executes in kernel threads.
|
||||
|
||||
config CRYPTO_WORKQUEUE
|
||||
tristate
|
||||
|
||||
|
||||
@ -56,6 +56,7 @@ obj-$(CONFIG_CRYPTO_XTS) += xts.o
|
||||
obj-$(CONFIG_CRYPTO_CTR) += ctr.o
|
||||
obj-$(CONFIG_CRYPTO_GCM) += gcm.o
|
||||
obj-$(CONFIG_CRYPTO_CCM) += ccm.o
|
||||
obj-$(CONFIG_CRYPTO_PCRYPT) += pcrypt.o
|
||||
obj-$(CONFIG_CRYPTO_CRYPTD) += cryptd.o
|
||||
obj-$(CONFIG_CRYPTO_DES) += des_generic.o
|
||||
obj-$(CONFIG_CRYPTO_FCRYPT) += fcrypt.o
|
||||
|
||||
445
crypto/pcrypt.c
Normal file
445
crypto/pcrypt.c
Normal file
@ -0,0 +1,445 @@
|
||||
/*
|
||||
* pcrypt - Parallel crypto wrapper.
|
||||
*
|
||||
* Copyright (C) 2009 secunet Security Networks AG
|
||||
* Copyright (C) 2009 Steffen Klassert <steffen.klassert@secunet.com>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms and conditions of the GNU General Public License,
|
||||
* version 2, as published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope it will be useful, but WITHOUT
|
||||
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||||
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
||||
* more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License along with
|
||||
* this program; if not, write to the Free Software Foundation, Inc.,
|
||||
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
|
||||
*/
|
||||
|
||||
#include <crypto/algapi.h>
|
||||
#include <crypto/internal/aead.h>
|
||||
#include <linux/err.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/slab.h>
|
||||
#include <crypto/pcrypt.h>
|
||||
|
||||
static struct padata_instance *pcrypt_enc_padata;
|
||||
static struct padata_instance *pcrypt_dec_padata;
|
||||
static struct workqueue_struct *encwq;
|
||||
static struct workqueue_struct *decwq;
|
||||
|
||||
struct pcrypt_instance_ctx {
|
||||
struct crypto_spawn spawn;
|
||||
unsigned int tfm_count;
|
||||
};
|
||||
|
||||
struct pcrypt_aead_ctx {
|
||||
struct crypto_aead *child;
|
||||
unsigned int cb_cpu;
|
||||
};
|
||||
|
||||
static int pcrypt_do_parallel(struct padata_priv *padata, unsigned int *cb_cpu,
|
||||
struct padata_instance *pinst)
|
||||
{
|
||||
unsigned int cpu_index, cpu, i;
|
||||
|
||||
cpu = *cb_cpu;
|
||||
|
||||
if (cpumask_test_cpu(cpu, cpu_active_mask))
|
||||
goto out;
|
||||
|
||||
cpu_index = cpu % cpumask_weight(cpu_active_mask);
|
||||
|
||||
cpu = cpumask_first(cpu_active_mask);
|
||||
for (i = 0; i < cpu_index; i++)
|
||||
cpu = cpumask_next(cpu, cpu_active_mask);
|
||||
|
||||
*cb_cpu = cpu;
|
||||
|
||||
out:
|
||||
return padata_do_parallel(pinst, padata, cpu);
|
||||
}
|
||||
|
||||
static int pcrypt_aead_setkey(struct crypto_aead *parent,
|
||||
const u8 *key, unsigned int keylen)
|
||||
{
|
||||
struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(parent);
|
||||
|
||||
return crypto_aead_setkey(ctx->child, key, keylen);
|
||||
}
|
||||
|
||||
static int pcrypt_aead_setauthsize(struct crypto_aead *parent,
|
||||
unsigned int authsize)
|
||||
{
|
||||
struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(parent);
|
||||
|
||||
return crypto_aead_setauthsize(ctx->child, authsize);
|
||||
}
|
||||
|
||||
static void pcrypt_aead_serial(struct padata_priv *padata)
|
||||
{
|
||||
struct pcrypt_request *preq = pcrypt_padata_request(padata);
|
||||
struct aead_request *req = pcrypt_request_ctx(preq);
|
||||
|
||||
aead_request_complete(req->base.data, padata->info);
|
||||
}
|
||||
|
||||
static void pcrypt_aead_giv_serial(struct padata_priv *padata)
|
||||
{
|
||||
struct pcrypt_request *preq = pcrypt_padata_request(padata);
|
||||
struct aead_givcrypt_request *req = pcrypt_request_ctx(preq);
|
||||
|
||||
aead_request_complete(req->areq.base.data, padata->info);
|
||||
}
|
||||
|
||||
static void pcrypt_aead_done(struct crypto_async_request *areq, int err)
|
||||
{
|
||||
struct aead_request *req = areq->data;
|
||||
struct pcrypt_request *preq = aead_request_ctx(req);
|
||||
struct padata_priv *padata = pcrypt_request_padata(preq);
|
||||
|
||||
padata->info = err;
|
||||
req->base.flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
|
||||
|
||||
padata_do_serial(padata);
|
||||
}
|
||||
|
||||
static void pcrypt_aead_enc(struct padata_priv *padata)
|
||||
{
|
||||
struct pcrypt_request *preq = pcrypt_padata_request(padata);
|
||||
struct aead_request *req = pcrypt_request_ctx(preq);
|
||||
|
||||
padata->info = crypto_aead_encrypt(req);
|
||||
|
||||
if (padata->info)
|
||||
return;
|
||||
|
||||
padata_do_serial(padata);
|
||||
}
|
||||
|
||||
static int pcrypt_aead_encrypt(struct aead_request *req)
|
||||
{
|
||||
int err;
|
||||
struct pcrypt_request *preq = aead_request_ctx(req);
|
||||
struct aead_request *creq = pcrypt_request_ctx(preq);
|
||||
struct padata_priv *padata = pcrypt_request_padata(preq);
|
||||
struct crypto_aead *aead = crypto_aead_reqtfm(req);
|
||||
struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(aead);
|
||||
u32 flags = aead_request_flags(req);
|
||||
|
||||
memset(padata, 0, sizeof(struct padata_priv));
|
||||
|
||||
padata->parallel = pcrypt_aead_enc;
|
||||
padata->serial = pcrypt_aead_serial;
|
||||
|
||||
aead_request_set_tfm(creq, ctx->child);
|
||||
aead_request_set_callback(creq, flags & ~CRYPTO_TFM_REQ_MAY_SLEEP,
|
||||
pcrypt_aead_done, req);
|
||||
aead_request_set_crypt(creq, req->src, req->dst,
|
||||
req->cryptlen, req->iv);
|
||||
aead_request_set_assoc(creq, req->assoc, req->assoclen);
|
||||
|
||||
err = pcrypt_do_parallel(padata, &ctx->cb_cpu, pcrypt_enc_padata);
|
||||
if (err)
|
||||
return err;
|
||||
else
|
||||
err = crypto_aead_encrypt(creq);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static void pcrypt_aead_dec(struct padata_priv *padata)
|
||||
{
|
||||
struct pcrypt_request *preq = pcrypt_padata_request(padata);
|
||||
struct aead_request *req = pcrypt_request_ctx(preq);
|
||||
|
||||
padata->info = crypto_aead_decrypt(req);
|
||||
|
||||
if (padata->info)
|
||||
return;
|
||||
|
||||
padata_do_serial(padata);
|
||||
}
|
||||
|
||||
static int pcrypt_aead_decrypt(struct aead_request *req)
|
||||
{
|
||||
int err;
|
||||
struct pcrypt_request *preq = aead_request_ctx(req);
|
||||
struct aead_request *creq = pcrypt_request_ctx(preq);
|
||||
struct padata_priv *padata = pcrypt_request_padata(preq);
|
||||
struct crypto_aead *aead = crypto_aead_reqtfm(req);
|
||||
struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(aead);
|
||||
u32 flags = aead_request_flags(req);
|
||||
|
||||
memset(padata, 0, sizeof(struct padata_priv));
|
||||
|
||||
padata->parallel = pcrypt_aead_dec;
|
||||
padata->serial = pcrypt_aead_serial;
|
||||
|
||||
aead_request_set_tfm(creq, ctx->child);
|
||||
aead_request_set_callback(creq, flags & ~CRYPTO_TFM_REQ_MAY_SLEEP,
|
||||
pcrypt_aead_done, req);
|
||||
aead_request_set_crypt(creq, req->src, req->dst,
|
||||
req->cryptlen, req->iv);
|
||||
aead_request_set_assoc(creq, req->assoc, req->assoclen);
|
||||
|
||||
err = pcrypt_do_parallel(padata, &ctx->cb_cpu, pcrypt_dec_padata);
|
||||
if (err)
|
||||
return err;
|
||||
else
|
||||
err = crypto_aead_decrypt(creq);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static void pcrypt_aead_givenc(struct padata_priv *padata)
|
||||
{
|
||||
struct pcrypt_request *preq = pcrypt_padata_request(padata);
|
||||
struct aead_givcrypt_request *req = pcrypt_request_ctx(preq);
|
||||
|
||||
padata->info = crypto_aead_givencrypt(req);
|
||||
|
||||
if (padata->info)
|
||||
return;
|
||||
|
||||
padata_do_serial(padata);
|
||||
}
|
||||
|
||||
static int pcrypt_aead_givencrypt(struct aead_givcrypt_request *req)
|
||||
{
|
||||
int err;
|
||||
struct aead_request *areq = &req->areq;
|
||||
struct pcrypt_request *preq = aead_request_ctx(areq);
|
||||
struct aead_givcrypt_request *creq = pcrypt_request_ctx(preq);
|
||||
struct padata_priv *padata = pcrypt_request_padata(preq);
|
||||
struct crypto_aead *aead = aead_givcrypt_reqtfm(req);
|
||||
struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(aead);
|
||||
u32 flags = aead_request_flags(areq);
|
||||
|
||||
memset(padata, 0, sizeof(struct padata_priv));
|
||||
|
||||
padata->parallel = pcrypt_aead_givenc;
|
||||
padata->serial = pcrypt_aead_giv_serial;
|
||||
|
||||
aead_givcrypt_set_tfm(creq, ctx->child);
|
||||
aead_givcrypt_set_callback(creq, flags & ~CRYPTO_TFM_REQ_MAY_SLEEP,
|
||||
pcrypt_aead_done, areq);
|
||||
aead_givcrypt_set_crypt(creq, areq->src, areq->dst,
|
||||
areq->cryptlen, areq->iv);
|
||||
aead_givcrypt_set_assoc(creq, areq->assoc, areq->assoclen);
|
||||
aead_givcrypt_set_giv(creq, req->giv, req->seq);
|
||||
|
||||
err = pcrypt_do_parallel(padata, &ctx->cb_cpu, pcrypt_enc_padata);
|
||||
if (err)
|
||||
return err;
|
||||
else
|
||||
err = crypto_aead_givencrypt(creq);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static int pcrypt_aead_init_tfm(struct crypto_tfm *tfm)
|
||||
{
|
||||
int cpu, cpu_index;
|
||||
struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
|
||||
struct pcrypt_instance_ctx *ictx = crypto_instance_ctx(inst);
|
||||
struct pcrypt_aead_ctx *ctx = crypto_tfm_ctx(tfm);
|
||||
struct crypto_aead *cipher;
|
||||
|
||||
ictx->tfm_count++;
|
||||
|
||||
cpu_index = ictx->tfm_count % cpumask_weight(cpu_active_mask);
|
||||
|
||||
ctx->cb_cpu = cpumask_first(cpu_active_mask);
|
||||
for (cpu = 0; cpu < cpu_index; cpu++)
|
||||
ctx->cb_cpu = cpumask_next(ctx->cb_cpu, cpu_active_mask);
|
||||
|
||||
cipher = crypto_spawn_aead(crypto_instance_ctx(inst));
|
||||
|
||||
if (IS_ERR(cipher))
|
||||
return PTR_ERR(cipher);
|
||||
|
||||
ctx->child = cipher;
|
||||
tfm->crt_aead.reqsize = sizeof(struct pcrypt_request)
|
||||
+ sizeof(struct aead_givcrypt_request)
|
||||
+ crypto_aead_reqsize(cipher);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void pcrypt_aead_exit_tfm(struct crypto_tfm *tfm)
|
||||
{
|
||||
struct pcrypt_aead_ctx *ctx = crypto_tfm_ctx(tfm);
|
||||
|
||||
crypto_free_aead(ctx->child);
|
||||
}
|
||||
|
||||
static struct crypto_instance *pcrypt_alloc_instance(struct crypto_alg *alg)
|
||||
{
|
||||
struct crypto_instance *inst;
|
||||
struct pcrypt_instance_ctx *ctx;
|
||||
int err;
|
||||
|
||||
inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
|
||||
if (!inst) {
|
||||
inst = ERR_PTR(-ENOMEM);
|
||||
goto out;
|
||||
}
|
||||
|
||||
err = -ENAMETOOLONG;
|
||||
if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
|
||||
"pcrypt(%s)", alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
|
||||
goto out_free_inst;
|
||||
|
||||
memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
|
||||
|
||||
ctx = crypto_instance_ctx(inst);
|
||||
err = crypto_init_spawn(&ctx->spawn, alg, inst,
|
||||
CRYPTO_ALG_TYPE_MASK);
|
||||
if (err)
|
||||
goto out_free_inst;
|
||||
|
||||
inst->alg.cra_priority = alg->cra_priority + 100;
|
||||
inst->alg.cra_blocksize = alg->cra_blocksize;
|
||||
inst->alg.cra_alignmask = alg->cra_alignmask;
|
||||
|
||||
out:
|
||||
return inst;
|
||||
|
||||
out_free_inst:
|
||||
kfree(inst);
|
||||
inst = ERR_PTR(err);
|
||||
goto out;
|
||||
}
|
||||
|
||||
static struct crypto_instance *pcrypt_alloc_aead(struct rtattr **tb)
|
||||
{
|
||||
struct crypto_instance *inst;
|
||||
struct crypto_alg *alg;
|
||||
struct crypto_attr_type *algt;
|
||||
|
||||
algt = crypto_get_attr_type(tb);
|
||||
|
||||
alg = crypto_get_attr_alg(tb, algt->type,
|
||||
(algt->mask & CRYPTO_ALG_TYPE_MASK));
|
||||
if (IS_ERR(alg))
|
||||
return ERR_CAST(alg);
|
||||
|
||||
inst = pcrypt_alloc_instance(alg);
|
||||
if (IS_ERR(inst))
|
||||
goto out_put_alg;
|
||||
|
||||
inst->alg.cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC;
|
||||
inst->alg.cra_type = &crypto_aead_type;
|
||||
|
||||
inst->alg.cra_aead.ivsize = alg->cra_aead.ivsize;
|
||||
inst->alg.cra_aead.geniv = alg->cra_aead.geniv;
|
||||
inst->alg.cra_aead.maxauthsize = alg->cra_aead.maxauthsize;
|
||||
|
||||
inst->alg.cra_ctxsize = sizeof(struct pcrypt_aead_ctx);
|
||||
|
||||
inst->alg.cra_init = pcrypt_aead_init_tfm;
|
||||
inst->alg.cra_exit = pcrypt_aead_exit_tfm;
|
||||
|
||||
inst->alg.cra_aead.setkey = pcrypt_aead_setkey;
|
||||
inst->alg.cra_aead.setauthsize = pcrypt_aead_setauthsize;
|
||||
inst->alg.cra_aead.encrypt = pcrypt_aead_encrypt;
|
||||
inst->alg.cra_aead.decrypt = pcrypt_aead_decrypt;
|
||||
inst->alg.cra_aead.givencrypt = pcrypt_aead_givencrypt;
|
||||
|
||||
out_put_alg:
|
||||
crypto_mod_put(alg);
|
||||
return inst;
|
||||
}
|
||||
|
||||
static struct crypto_instance *pcrypt_alloc(struct rtattr **tb)
|
||||
{
|
||||
struct crypto_attr_type *algt;
|
||||
|
||||
algt = crypto_get_attr_type(tb);
|
||||
if (IS_ERR(algt))
|
||||
return ERR_CAST(algt);
|
||||
|
||||
switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) {
|
||||
case CRYPTO_ALG_TYPE_AEAD:
|
||||
return pcrypt_alloc_aead(tb);
|
||||
}
|
||||
|
||||
return ERR_PTR(-EINVAL);
|
||||
}
|
||||
|
||||
static void pcrypt_free(struct crypto_instance *inst)
|
||||
{
|
||||
struct pcrypt_instance_ctx *ctx = crypto_instance_ctx(inst);
|
||||
|
||||
crypto_drop_spawn(&ctx->spawn);
|
||||
kfree(inst);
|
||||
}
|
||||
|
||||
static struct crypto_template pcrypt_tmpl = {
|
||||
.name = "pcrypt",
|
||||
.alloc = pcrypt_alloc,
|
||||
.free = pcrypt_free,
|
||||
.module = THIS_MODULE,
|
||||
};
|
||||
|
||||
static int __init pcrypt_init(void)
|
||||
{
|
||||
encwq = create_workqueue("pencrypt");
|
||||
if (!encwq)
|
||||
goto err;
|
||||
|
||||
decwq = create_workqueue("pdecrypt");
|
||||
if (!decwq)
|
||||
goto err_destroy_encwq;
|
||||
|
||||
|
||||
pcrypt_enc_padata = padata_alloc(cpu_possible_mask, encwq);
|
||||
if (!pcrypt_enc_padata)
|
||||
goto err_destroy_decwq;
|
||||
|
||||
pcrypt_dec_padata = padata_alloc(cpu_possible_mask, decwq);
|
||||
if (!pcrypt_dec_padata)
|
||||
goto err_free_padata;
|
||||
|
||||
padata_start(pcrypt_enc_padata);
|
||||
padata_start(pcrypt_dec_padata);
|
||||
|
||||
return crypto_register_template(&pcrypt_tmpl);
|
||||
|
||||
err_free_padata:
|
||||
padata_free(pcrypt_enc_padata);
|
||||
|
||||
err_destroy_decwq:
|
||||
destroy_workqueue(decwq);
|
||||
|
||||
err_destroy_encwq:
|
||||
destroy_workqueue(encwq);
|
||||
|
||||
err:
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
static void __exit pcrypt_exit(void)
|
||||
{
|
||||
padata_stop(pcrypt_enc_padata);
|
||||
padata_stop(pcrypt_dec_padata);
|
||||
|
||||
destroy_workqueue(encwq);
|
||||
destroy_workqueue(decwq);
|
||||
|
||||
padata_free(pcrypt_enc_padata);
|
||||
padata_free(pcrypt_dec_padata);
|
||||
|
||||
crypto_unregister_template(&pcrypt_tmpl);
|
||||
}
|
||||
|
||||
module_init(pcrypt_init);
|
||||
module_exit(pcrypt_exit);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_AUTHOR("Steffen Klassert <steffen.klassert@secunet.com>");
|
||||
MODULE_DESCRIPTION("Parallel crypto wrapper");
|
||||
51
include/crypto/pcrypt.h
Normal file
51
include/crypto/pcrypt.h
Normal file
@ -0,0 +1,51 @@
|
||||
/*
|
||||
* pcrypt - Parallel crypto engine.
|
||||
*
|
||||
* Copyright (C) 2009 secunet Security Networks AG
|
||||
* Copyright (C) 2009 Steffen Klassert <steffen.klassert@secunet.com>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms and conditions of the GNU General Public License,
|
||||
* version 2, as published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope it will be useful, but WITHOUT
|
||||
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||||
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
||||
* more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License along with
|
||||
* this program; if not, write to the Free Software Foundation, Inc.,
|
||||
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
|
||||
*/
|
||||
|
||||
#ifndef _CRYPTO_PCRYPT_H
|
||||
#define _CRYPTO_PCRYPT_H
|
||||
|
||||
#include <linux/crypto.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/padata.h>
|
||||
|
||||
struct pcrypt_request {
|
||||
struct padata_priv padata;
|
||||
void *data;
|
||||
void *__ctx[] CRYPTO_MINALIGN_ATTR;
|
||||
};
|
||||
|
||||
static inline void *pcrypt_request_ctx(struct pcrypt_request *req)
|
||||
{
|
||||
return req->__ctx;
|
||||
}
|
||||
|
||||
static inline
|
||||
struct padata_priv *pcrypt_request_padata(struct pcrypt_request *req)
|
||||
{
|
||||
return &req->padata;
|
||||
}
|
||||
|
||||
static inline
|
||||
struct pcrypt_request *pcrypt_padata_request(struct padata_priv *padata)
|
||||
{
|
||||
return container_of(padata, struct pcrypt_request, padata);
|
||||
}
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue
Block a user