diff options
author | Marek Vasut <marex@denx.de> | 2014-03-14 02:37:05 +0100 |
---|---|---|
committer | Herbert Xu <herbert@gondor.apana.org.au> | 2014-03-21 21:54:21 +0800 |
commit | 1ffc9fbd1e5071948b6d48f9a27d845738ee890f (patch) | |
tree | d125f7d9bde442e04cf1bd6433f7d4136660b4f6 /crypto | |
parent | ab6bf4e5e5e4298e8649e635bee25542cccbfd97 (diff) | |
download | linux-next-1ffc9fbd1e5071948b6d48f9a27d845738ee890f.tar.gz |
crypto: hash - Pull out the functions to save/restore request
The functions to save original request within a newly adjusted request
and it's counterpart to restore the original request can be re-used by
more code in the crypto/ahash.c file. Pull these functions out from the
code so they're available.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: David S. Miller <davem@davemloft.net>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Shawn Guo <shawn.guo@linaro.org>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto')
-rw-r--r-- | crypto/ahash.c | 107 |
1 files changed, 62 insertions, 45 deletions
diff --git a/crypto/ahash.c b/crypto/ahash.c index 4fdb4d3fddec..fcc6077b9af0 100644 --- a/crypto/ahash.c +++ b/crypto/ahash.c @@ -190,55 +190,12 @@ static inline unsigned int ahash_align_buffer_size(unsigned len, return len + (mask & ~(crypto_tfm_ctx_alignment() - 1)); } -static void ahash_op_unaligned_finish(struct ahash_request *req, int err) -{ - struct ahash_request_priv *priv = req->priv; - - if (err == -EINPROGRESS) - return; - - if (!err) - memcpy(priv->result, req->result, - crypto_ahash_digestsize(crypto_ahash_reqtfm(req))); - - /* Restore the original crypto request. */ - req->result = priv->result; - req->base.complete = priv->complete; - req->base.data = priv->data; - req->priv = NULL; - - /* Free the req->priv.priv from the ADJUSTED request. */ - kzfree(priv); -} - -static void ahash_op_unaligned_done(struct crypto_async_request *req, int err) -{ - struct ahash_request *areq = req->data; - - /* - * Restore the original request, see ahash_op_unaligned() for what - * goes where. - * - * The "struct ahash_request *req" here is in fact the "req.base" - * from the ADJUSTED request from ahash_op_unaligned(), thus as it - * is a pointer to self, it is also the ADJUSTED "req" . - */ - - /* First copy areq->result into areq->priv.result */ - ahash_op_unaligned_finish(areq, err); - - /* Complete the ORIGINAL request. */ - areq->base.complete(&areq->base, err); -} - -static int ahash_op_unaligned(struct ahash_request *req, - int (*op)(struct ahash_request *)) +static int ahash_save_req(struct ahash_request *req, crypto_completion_t cplt) { struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); unsigned long alignmask = crypto_ahash_alignmask(tfm); unsigned int ds = crypto_ahash_digestsize(tfm); struct ahash_request_priv *priv; - int err; priv = kmalloc(sizeof(*priv) + ahash_align_buffer_size(ds, alignmask), (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ? @@ -281,10 +238,70 @@ static int ahash_op_unaligned(struct ahash_request *req, */ req->result = PTR_ALIGN((u8 *)priv->ubuf, alignmask + 1); - req->base.complete = ahash_op_unaligned_done; + req->base.complete = cplt; req->base.data = req; req->priv = priv; + return 0; +} + +static void ahash_restore_req(struct ahash_request *req) +{ + struct ahash_request_priv *priv = req->priv; + + /* Restore the original crypto request. */ + req->result = priv->result; + req->base.complete = priv->complete; + req->base.data = priv->data; + req->priv = NULL; + + /* Free the req->priv.priv from the ADJUSTED request. */ + kzfree(priv); +} + +static void ahash_op_unaligned_finish(struct ahash_request *req, int err) +{ + struct ahash_request_priv *priv = req->priv; + + if (err == -EINPROGRESS) + return; + + if (!err) + memcpy(priv->result, req->result, + crypto_ahash_digestsize(crypto_ahash_reqtfm(req))); + + ahash_restore_req(req); +} + +static void ahash_op_unaligned_done(struct crypto_async_request *req, int err) +{ + struct ahash_request *areq = req->data; + + /* + * Restore the original request, see ahash_op_unaligned() for what + * goes where. + * + * The "struct ahash_request *req" here is in fact the "req.base" + * from the ADJUSTED request from ahash_op_unaligned(), thus as it + * is a pointer to self, it is also the ADJUSTED "req" . + */ + + /* First copy req->result into req->priv.result */ + ahash_op_unaligned_finish(areq, err); + + /* Complete the ORIGINAL request. */ + areq->base.complete(&areq->base, err); +} + +static int ahash_op_unaligned(struct ahash_request *req, + int (*op)(struct ahash_request *)) +{ + int err; + + err = ahash_save_req(req, ahash_op_unaligned_done); + if (err) + return err; + err = op(req); ahash_op_unaligned_finish(req, err); |