2 * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
18 #define DPIF_NETDEV_H 1
23 #include "openvswitch/types.h"
31 /* Enough headroom to add a vlan tag, plus an extra 2 bytes to allow IP
32 * headers to be aligned on a 4-byte boundary. */
33 enum { DP_NETDEV_HEADROOM = 2 + VLAN_HEADER_LEN };
35 static inline void dp_packet_pad(struct ofpbuf *b)
37 if (ofpbuf_size(b) < ETH_TOTAL_MIN) {
38 ofpbuf_put_zeros(b, ETH_TOTAL_MIN - ofpbuf_size(b));