smb: smbdirect: introduce smbdirect_socket.recv_io.expected

[ Upstream commit 33dd53a ]

The expected message type can be global as they never change
during the after negotiation process.

This will replace smbd_response->type and smb_direct_recvmsg->type
in future.

Cc: Steve French <[email protected]>
Cc: Tom Talpey <[email protected]>
Cc: Long Li <[email protected]>
Cc: Namjae Jeon <[email protected]>
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Stefan Metzmacher <[email protected]>
Signed-off-by: Steve French <[email protected]>
Stable-dep-of: f57e53e ("smb: client: let recv_done verify data_offset, data_length and remaining_data_length")
Signed-off-by: Sasha Levin <[email protected]>

Author: metze-samba

fs/smb/common/smbdirect/smbdirect_socket.h

@@ -38,6 +38,20 @@ struct smbdirect_socket {
 	} ib;
 
 	struct smbdirect_socket_parameters parameters;
+
+	/*
+	 * The state for posted receive buffers
+	 */
+	struct {
+		/*
+		 * The type of PDU we are expecting
+		 */
+		enum {
+			SMBDIRECT_EXPECT_NEGOTIATE_REQ = 1,
+			SMBDIRECT_EXPECT_NEGOTIATE_REP = 2,
+			SMBDIRECT_EXPECT_DATA_TRANSFER = 3,
+		} expected;
+	} recv_io;
 };
 
 #endif /* __FS_SMB_COMMON_SMBDIRECT_SMBDIRECT_SOCKET_H__ */