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@xxxxxxx>
Cc: David S. Miller <davem@xxxxxxxxxxxxx>
Cc: Fabio Estevam <fabio.estevam@xxxxxxxxxxxxx>
Cc: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Cc: Shawn Guo <shawn.guo@xxxxxxxxxx>
Cc: Tom Lendacky <thomas.lendacky@xxxxxxx>
---
crypto/ahash.c | 112 +++++++++++++++++++++++++++++++++------------------------
1 file changed, 65 insertions(+), 47 deletions(-)
diff --git a/crypto/ahash.c b/crypto/ahash.c
index 5ca8ede..635cd49 100644
--- a/crypto/ahash.c
+++ b/crypto/ahash.c
@@ -191,58 +191,14 @@ 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)));
-}
+static void ahash_op_unaligned_done(struct crypto_async_request *areq, int err);
-static void ahash_op_unaligned_done(struct crypto_async_request *areq, int err)
-{
- struct ahash_request *req = areq->data;
- struct ahash_request_priv *priv = req->priv;
- struct crypto_async_request *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(req, err);
-
- /* Restore the original crypto request. */
- req->result = priv->result;
- req->base.complete = priv->complete;
- req->base.data = priv->data;
- req->priv = priv->priv;
-
- /* Free the req->priv.priv from the ADJUSTED request. */
- kzfree(priv);
-
- /* Complete the ORIGINAL request. */
- data = req->base.data;
- req->base.complete(data, 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) ?
@@ -282,10 +238,72 @@ static int ahash_op_unaligned(struct ahash_request *req,
priv->priv = req->priv;
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 = priv->priv;
+
+ /* 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)));
+}
+
+static void ahash_op_unaligned_done(struct crypto_async_request *areq, int err)
+{
+ struct ahash_request *req = areq->data;
+ struct crypto_async_request *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(req, err);
+
+ ahash_restore_req(req);
+
+ /* Complete the ORIGINAL request. */
+ data = req->base.data;
+ req->base.complete(data, 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);
--
1.8.5.2
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