diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index 0e962cb..f5bf63f 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -453,6 +453,21 @@
 	__le32 Attributes;
 } __packed;
 
+struct smb2_flush_req {
+	struct smb2_hdr hdr;
+	__le16 StructureSize;	/* Must be 24 */
+	__le16 Reserved1;
+	__le32 Reserved2;
+	__u64  PersistentFileId; /* opaque endianness */
+	__u64  VolatileFileId; /* opaque endianness */
+} __packed;
+
+struct smb2_flush_rsp {
+	struct smb2_hdr hdr;
+	__le16 StructureSize;
+	__le16 Reserved;
+} __packed;
+
 struct smb2_echo_req {
 	struct smb2_hdr hdr;
 	__le16 StructureSize;	/* Must be 4 */