AEAD reuses the existing request object for its child. This is
error-prone and unnecessary. This patch adds a subrequest object
just like we do for skcipher and hash.
This patch also restores the original completion function as we
do for skcipher/hash.
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
---
crypto/cryptd.c | 18 +++++++++++++++---
1 file changed, 15 insertions(+), 3 deletions(-)
diff --git a/crypto/cryptd.c b/crypto/cryptd.c
index 1ff58a021d57..c0c416eda8e8 100644
--- a/crypto/cryptd.c
+++ b/crypto/cryptd.c
@@ -93,6 +93,7 @@ struct cryptd_aead_ctx {
struct cryptd_aead_request_ctx {
crypto_completion_t complete;
+ struct aead_request req;
};
static void cryptd_queue_worker(struct work_struct *work);
@@ -715,6 +716,7 @@ static void cryptd_aead_crypt(struct aead_request *req,
int (*crypt)(struct aead_request *req))
{
struct cryptd_aead_request_ctx *rctx;
+ struct aead_request *subreq;
struct cryptd_aead_ctx *ctx;
crypto_completion_t compl;
struct crypto_aead *tfm;
@@ -722,14 +724,24 @@ static void cryptd_aead_crypt(struct aead_request *req,
rctx = aead_request_ctx(req);
compl = rctx->complete;
+ subreq = &rctx->req;
tfm = crypto_aead_reqtfm(req);
if (unlikely(err == -EINPROGRESS))
goto out;
- aead_request_set_tfm(req, child);
+
+ aead_request_set_tfm(subreq, child);
+ aead_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP,
+ NULL, NULL);
+ aead_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
+ req->iv);
+ aead_request_set_ad(subreq, req->assoclen);
+
err = crypt( req );
+ req->base.complete = compl;
+
out:
ctx = crypto_aead_ctx(tfm);
refcnt = refcount_read(&ctx->refcnt);
@@ -798,8 +810,8 @@ static int cryptd_aead_init_tfm(struct crypto_aead *tfm)
ctx->child = cipher;
crypto_aead_set_reqsize(
- tfm, max((unsigned)sizeof(struct cryptd_aead_request_ctx),
- crypto_aead_reqsize(cipher)));
+ tfm, sizeof(struct cryptd_aead_request_ctx) +
+ crypto_aead_reqsize(cipher));
return 0;
}
