CIFS: Add oplock break support for SMB2

Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index e6ddd1f..8a07457 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -615,6 +615,16 @@
 	__le16 StructureSize; /* Must be 2 */
 } __packed;
 
+struct smb2_oplock_break {
+	struct smb2_hdr hdr;
+	__le16 StructureSize; /* Must be 24 */
+	__u8   OplockLevel;
+	__u8   Reserved;
+	__le32 Reserved2;
+	__u64  PersistentFid;
+	__u64  VolatileFid;
+} __packed;
+
 /*
  *	PDU infolevel structure definitions
  *	BB consider moving to a different header