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crypto: algif - move to generic async completion 

algif starts several async crypto ops and waits for their completion.
Move it over to generic code doing the same.

Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Gilad Ben-Yossef 2017-10-18 08:00:39 +01:00 committed by Herbert Xu
parent ada69a1639
commit 2c3f8b1621
5 changed files with 23 additions and 66 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
crypto/af_alg.c
View File

@ -481,33 +481,6 @@ int af_alg_cmsg_send(struct msghdr *msg, struct af_alg_control *con)
}
EXPORT_SYMBOL_GPL(af_alg_cmsg_send);
int af_alg_wait_for_completion(int err, struct af_alg_completion *completion)
{
switch (err) {
case -EINPROGRESS:
case -EBUSY:
wait_for_completion(&completion->completion);
reinit_completion(&completion->completion);
err = completion->err;
break;
};
return err;
}
EXPORT_SYMBOL_GPL(af_alg_wait_for_completion);
void af_alg_complete(struct crypto_async_request *req, int err)
{
struct af_alg_completion *completion = req->data;
if (err == -EINPROGRESS)
return;
completion->err = err;
complete(&completion->completion);
}
EXPORT_SYMBOL_GPL(af_alg_complete);
/**
* af_alg_alloc_tsgl - allocate the TX SGL
*

8
crypto/algif_aead.c
View File

@ -278,11 +278,11 @@ static int _aead_recvmsg(struct socket *sock, struct msghdr *msg,
/* Synchronous operation */
aead_request_set_callback(&areq->cra_u.aead_req,
CRYPTO_TFM_REQ_MAY_BACKLOG,
af_alg_complete, &ctx->completion);
err = af_alg_wait_for_completion(ctx->enc ?
crypto_req_done, &ctx->wait);
err = crypto_wait_req(ctx->enc ?
crypto_aead_encrypt(&areq->cra_u.aead_req) :
crypto_aead_decrypt(&areq->cra_u.aead_req),
&ctx->completion);
&ctx->wait);
}
/* AIO operation in progress */
@ -554,7 +554,7 @@ static int aead_accept_parent_nokey(void *private, struct sock *sk)
ctx->merge = 0;
ctx->enc = 0;
ctx->aead_assoclen = 0;
af_alg_init_completion(&ctx->completion);
crypto_init_wait(&ctx->wait);
ask->private = ctx;

30
crypto/algif_hash.c
View File

@ -26,7 +26,7 @@ struct hash_ctx {
u8 *result;
struct af_alg_completion completion;
struct crypto_wait wait;
unsigned int len;
bool more;
@ -88,8 +88,7 @@ static int hash_sendmsg(struct socket *sock, struct msghdr *msg,
if ((msg->msg_flags & MSG_MORE))
hash_free_result(sk, ctx);
err = af_alg_wait_for_completion(crypto_ahash_init(&ctx->req),
&ctx->completion);
err = crypto_wait_req(crypto_ahash_init(&ctx->req), &ctx->wait);
if (err)
goto unlock;
}
@ -110,8 +109,8 @@ static int hash_sendmsg(struct socket *sock, struct msghdr *msg,
ahash_request_set_crypt(&ctx->req, ctx->sgl.sg, NULL, len);
err = af_alg_wait_for_completion(crypto_ahash_update(&ctx->req),
&ctx->completion);
err = crypto_wait_req(crypto_ahash_update(&ctx->req),
&ctx->wait);
af_alg_free_sg(&ctx->sgl);
if (err)
goto unlock;
@ -129,8 +128,8 @@ static int hash_sendmsg(struct socket *sock, struct msghdr *msg,
goto unlock;
ahash_request_set_crypt(&ctx->req, NULL, ctx->result, 0);
err = af_alg_wait_for_completion(crypto_ahash_final(&ctx->req),
&ctx->completion);
err = crypto_wait_req(crypto_ahash_final(&ctx->req),
&ctx->wait);
}
unlock:
@ -171,7 +170,7 @@ static ssize_t hash_sendpage(struct socket *sock, struct page *page,
} else {
if (!ctx->more) {
err = crypto_ahash_init(&ctx->req);
err = af_alg_wait_for_completion(err, &ctx->completion);
err = crypto_wait_req(err, &ctx->wait);
if (err)
goto unlock;
}
@ -179,7 +178,7 @@ static ssize_t hash_sendpage(struct socket *sock, struct page *page,
err = crypto_ahash_update(&ctx->req);
}
err = af_alg_wait_for_completion(err, &ctx->completion);
err = crypto_wait_req(err, &ctx->wait);
if (err)
goto unlock;
@ -215,17 +214,16 @@ static int hash_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
ahash_request_set_crypt(&ctx->req, NULL, ctx->result, 0);
if (!result && !ctx->more) {
err = af_alg_wait_for_completion(
crypto_ahash_init(&ctx->req),
&ctx->completion);
err = crypto_wait_req(crypto_ahash_init(&ctx->req),
&ctx->wait);
if (err)
goto unlock;
}
if (!result || ctx->more) {
ctx->more = 0;
err = af_alg_wait_for_completion(crypto_ahash_final(&ctx->req),
&ctx->completion);
err = crypto_wait_req(crypto_ahash_final(&ctx->req),
&ctx->wait);
if (err)
goto unlock;
}
@ -476,13 +474,13 @@ static int hash_accept_parent_nokey(void *private, struct sock *sk)
ctx->result = NULL;
ctx->len = len;
ctx->more = 0;
af_alg_init_completion(&ctx->completion);
crypto_init_wait(&ctx->wait);
ask->private = ctx;
ahash_request_set_tfm(&ctx->req, hash);
ahash_request_set_callback(&ctx->req, CRYPTO_TFM_REQ_MAY_BACKLOG,
af_alg_complete, &ctx->completion);
crypto_req_done, &ctx->wait);
sk->sk_destruct = hash_sock_destruct;

9
crypto/algif_skcipher.c
View File

@ -129,12 +129,11 @@ static int _skcipher_recvmsg(struct socket *sock, struct msghdr *msg,
skcipher_request_set_callback(&areq->cra_u.skcipher_req,
CRYPTO_TFM_REQ_MAY_SLEEP |
CRYPTO_TFM_REQ_MAY_BACKLOG,
af_alg_complete,
&ctx->completion);
err = af_alg_wait_for_completion(ctx->enc ?
crypto_req_done, &ctx->wait);
err = crypto_wait_req(ctx->enc ?
crypto_skcipher_encrypt(&areq->cra_u.skcipher_req) :
crypto_skcipher_decrypt(&areq->cra_u.skcipher_req),
&ctx->completion);
&ctx->wait);
}
/* AIO operation in progress */
@ -388,7 +387,7 @@ static int skcipher_accept_parent_nokey(void *private, struct sock *sk)
ctx->more = 0;
ctx->merge = 0;
ctx->enc = 0;
af_alg_init_completion(&ctx->completion);
crypto_init_wait(&ctx->wait);
ask->private = ctx;

15
include/crypto/if_alg.h
View File

@ -40,11 +40,6 @@ struct alg_sock {
void *private;
};
struct af_alg_completion {
struct completion completion;
int err;
};
struct af_alg_control {
struct af_alg_iv *iv;
int op;
@ -152,7 +147,7 @@ struct af_alg_ctx {
void *iv;
size_t aead_assoclen;
struct af_alg_completion completion;
struct crypto_wait wait;
size_t used;
size_t rcvused;
@ -177,19 +172,11 @@ void af_alg_link_sg(struct af_alg_sgl *sgl_prev, struct af_alg_sgl *sgl_new);
int af_alg_cmsg_send(struct msghdr *msg, struct af_alg_control *con);
int af_alg_wait_for_completion(int err, struct af_alg_completion *completion);
void af_alg_complete(struct crypto_async_request *req, int err);
static inline struct alg_sock *alg_sk(struct sock *sk)
{
return (struct alg_sock *)sk;
}
static inline void af_alg_init_completion(struct af_alg_completion *completion)
{
init_completion(&completion->completion);
}
/**
* Size of available buffer for sending data from user space to kernel.
*