rxrpc: Merge prime_packet_security into init_connection_security

Merge the ->prime_packet_security() into the ->init_connection_security()
hook as they're always called together.
Signed-off-by: David Howells <dhowells@redhat.com>

net/rxrpc/ar-internal.h

@@ -234,8 +234,6 @@ struct rxrpc_security {
 	int (*init_connection_security)(struct rxrpc_connection *,
 					struct rxrpc_key_token *);
 
-	/* prime a connection's packet security */
-	int (*prime_packet_security)(struct rxrpc_connection *);
 
 	/* impose security on a packet */
 	int (*secure_packet)(struct rxrpc_call *,

net/rxrpc/conn_client.c

@@ -180,10 +180,6 @@ rxrpc_alloc_client_connection(struct rxrpc_bundle *bundle, gfp_t gfp)
 	if (ret < 0)
 		goto error_1;
 
-	ret = conn->security->prime_packet_security(conn);
-	if (ret < 0)
-		goto error_2;
-
 	atomic_inc(&rxnet->nr_conns);
 	write_lock(&rxnet->conn_lock);
 	list_add_tail(&conn->proc_link, &rxnet->conn_proc_list);
@@ -203,8 +199,6 @@ rxrpc_alloc_client_connection(struct rxrpc_bundle *bundle, gfp_t gfp)
 	_leave(" = %p", conn);
 	return conn;
 
-error_2:
-	conn->security->clear(conn);
 error_1:
 	rxrpc_put_client_connection_id(conn);
 error_0:

net/rxrpc/conn_event.c

@@ -338,10 +338,6 @@ static int rxrpc_process_event(struct rxrpc_connection *conn,
 		if (ret < 0)
 			return ret;
 
-		ret = conn->security->prime_packet_security(conn);
-		if (ret < 0)
-			return ret;
-
 		spin_lock(&conn->bundle->channel_lock);
 		spin_lock_bh(&conn->state_lock);
 

net/rxrpc/insecure.c

@@ -14,11 +14,6 @@ static int none_init_connection_security(struct rxrpc_connection *conn,
 	return 0;
 }
 
-static int none_prime_packet_security(struct rxrpc_connection *conn)
-{
-	return 0;
-}
-
 static int none_secure_packet(struct rxrpc_call *call,
 			      struct sk_buff *skb,
 			      size_t data_size,
@@ -87,7 +82,6 @@ const struct rxrpc_security rxrpc_no_security = {
 	.init				= none_init,
 	.exit				= none_exit,
 	.init_connection_security	= none_init_connection_security,
-	.prime_packet_security		= none_prime_packet_security,
 	.free_call_crypto		= none_free_call_crypto,
 	.secure_packet			= none_secure_packet,
 	.verify_packet			= none_verify_packet,

net/rxrpc/rxkad.c

@@ -38,6 +38,9 @@ struct rxkad_level2_hdr {
 	__be32	checksum;	/* decrypted data checksum */
 };
 
+static int rxkad_prime_packet_security(struct rxrpc_connection *conn,
+				       struct crypto_sync_skcipher *ci);
+
 /*
  * this holds a pinned cipher so that keventd doesn't get called by the cipher
  * alloc routine, but since we have it to hand, we use it to decrypt RESPONSE
@@ -130,8 +133,15 @@ static int rxkad_init_connection_security(struct rxrpc_connection *conn,
 		goto error;
 	}
 
+	ret = rxkad_prime_packet_security(conn, ci);
+	if (ret < 0)
+		goto error_ci;
+
 	conn->cipher = ci;
-	ret = 0;
+	return 0;
+
+error_ci:
+	crypto_free_sync_skcipher(ci);
 error:
 	_leave(" = %d", ret);
 	return ret;
@@ -141,7 +151,8 @@ static int rxkad_init_connection_security(struct rxrpc_connection *conn,
  * prime the encryption state with the invariant parts of a connection's
  * description
  */
-static int rxkad_prime_packet_security(struct rxrpc_connection *conn)
+static int rxkad_prime_packet_security(struct rxrpc_connection *conn,
+				       struct crypto_sync_skcipher *ci)
 {
 	struct skcipher_request *req;
 	struct rxrpc_key_token *token;
@@ -159,7 +170,7 @@ static int rxkad_prime_packet_security(struct rxrpc_connection *conn)
 	if (!tmpbuf)
 		return -ENOMEM;
 
-	req = skcipher_request_alloc(&conn->cipher->base, GFP_NOFS);
+	req = skcipher_request_alloc(&ci->base, GFP_NOFS);
 	if (!req) {
 		kfree(tmpbuf);
 		return -ENOMEM;
@@ -174,7 +185,7 @@ static int rxkad_prime_packet_security(struct rxrpc_connection *conn)
 	tmpbuf[3] = htonl(conn->security_ix);
 
 	sg_init_one(&sg, tmpbuf, tmpsize);
-	skcipher_request_set_sync_tfm(req, conn->cipher);
+	skcipher_request_set_sync_tfm(req, ci);
 	skcipher_request_set_callback(req, 0, NULL, NULL);
 	skcipher_request_set_crypt(req, &sg, &sg, tmpsize, iv.x);
 	crypto_skcipher_encrypt(req);
@@ -1350,7 +1361,6 @@ const struct rxrpc_security rxkad = {
 	.free_preparse_server_key	= rxkad_free_preparse_server_key,
 	.destroy_server_key		= rxkad_destroy_server_key,
 	.init_connection_security	= rxkad_init_connection_security,
-	.prime_packet_security		= rxkad_prime_packet_security,
 	.secure_packet			= rxkad_secure_packet,
 	.verify_packet			= rxkad_verify_packet,
 	.free_call_crypto		= rxkad_free_call_crypto,