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