[PATCH v4 13/19] cifs: move to generic async completion - Gilad Ben-Yossef

From: Gilad Ben-Yossef <gilad@benyossef.com>
To: Herbert Xu <herbert@gondor.apana.org.au>,
	"David S. Miller" <davem@davemloft.net>,
	Jonathan Corbet <corbet@lwn.net>,
	David Howells <dhowells@redhat.com>,
	Tom Lendacky <thomas.lendacky@amd.com>,
	Gary Hook <gary.hook@amd.com>,
	Boris Brezillon <boris.brezillon@free-electrons.com>,
	Arnaud Ebalard <arno@natisbad.org>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	Alasdair Kergon <agk@redhat.com>,
	Mike Snitzer <snitzer@redhat.com>,
	dm-devel@redhat.com, Shaohua Li <shli@kernel.org>,
	Steve French <sfrench@samba.org>,
	"Theodore Y. Ts'o" <tytso@mit.edu>,
	Jaegeuk Kim <jaegeuk@kernel.org>,
	Mimi Zohar <zohar@linux.vnet.ibm.com>,
	Dmitry Kasatkin <dmitry.kasatkin@gmail.com>,
	James Morris <james.l.morris@oracle.com>,
	"Serge E. Hallyn" <serge@hallyn.com>,
	linux-crypto@v
Cc: Ofir Drang <ofir.drang@arm.com>
Subject: [PATCH v4 13/19] cifs: move to generic async completion
Date: Tue,  8 Aug 2017 15:03:44 +0300	[thread overview]
Message-ID: <1502193834-11289-14-git-send-email-gilad__43923.3757708736$1502194210$gmane$org@benyossef.com> (raw)
In-Reply-To: <1502193834-11289-1-git-send-email-gilad@benyossef.com>

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@benyossef.com>
Acked-by: Pavel Shilovsky <pshilov@microsoft.com>
---
 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 cfacf2c..16fb041 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -1878,22 +1878,6 @@ 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)
 {
@@ -1934,12 +1918,10 @@ 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__,
@@ -1999,14 +1981,10 @@ 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

