2017-05-06 5:59 GMT-07:00 Gilad Ben-Yossef <gilad@xxxxxxxxxxxxx>:
> cifs starts an async. crypto op and waits for their completion.
> Move it over to generic code doing the same.
>
> Signed-off-by: Gilad Ben-Yossef <gilad@xxxxxxxxxxxxx>
> ---
> fs/cifs/smb2ops.c | 30 ++++--------------------------
> 1 file changed, 4 insertions(+), 26 deletions(-)
>
> diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
> index 152e37f..cee7bb3 100644
> --- a/fs/cifs/smb2ops.c
> +++ b/fs/cifs/smb2ops.c
> @@ -1706,22 +1706,6 @@ init_sg(struct smb_rqst *rqst, u8 *sign)
> return sg;
> }
>
> -struct cifs_crypt_result {
> - int err;
> - struct completion completion;
> -};
> -
> -static void cifs_crypt_complete(struct crypto_async_request *req, int err)
> -{
> - struct cifs_crypt_result *res = req->data;
> -
> - if (err == -EINPROGRESS)
> - return;
> -
> - res->err = err;
> - complete(&res->completion);
> -}
> -
> static int
> smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
> {
> @@ -1762,12 +1746,10 @@ crypt_message(struct TCP_Server_Info *server, struct smb_rqst *rqst, int enc)
> struct aead_request *req;
> char *iv;
> unsigned int iv_len;
> - struct cifs_crypt_result result = {0, };
> + DECLARE_CRYPTO_WAIT(wait);
> struct crypto_aead *tfm;
> unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
>
> - init_completion(&result.completion);
> -
> rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
> if (rc) {
> cifs_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
> @@ -1825,14 +1807,10 @@ crypt_message(struct TCP_Server_Info *server, struct smb_rqst *rqst, int enc)
> aead_request_set_ad(req, assoc_data_len);
>
> aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
> - cifs_crypt_complete, &result);
> + crypto_req_done, &wait);
>
> - rc = enc ? crypto_aead_encrypt(req) : crypto_aead_decrypt(req);
> -
> - if (rc == -EINPROGRESS || rc == -EBUSY) {
> - wait_for_completion(&result.completion);
> - rc = result.err;
> - }
> + rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
> + : crypto_aead_decrypt(req), &wait);
>
> if (!rc && enc)
> memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
> --
> 2.1.4
>
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Acked-by: Pavel Shilovsky <pshilov@xxxxxxxxxxxxx>
Best regards,
Pavel Shilovsky
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