2 * Copyright (c) 2019 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #ifndef __IP_FLOW_HASH_H__
17 #define __IP_FLOW_HASH_H__
19 #include <vnet/ip/ip_types.h>
21 /** Default: 5-tuple + flowlabel without the "reverse" bit */
22 #define IP_FLOW_HASH_DEFAULT (0x9F)
24 #define foreach_flow_hash_bit_v1 \
25 _ (src, IP_FLOW_HASH_SRC_ADDR) \
26 _ (dst, IP_FLOW_HASH_DST_ADDR) \
27 _ (sport, IP_FLOW_HASH_SRC_PORT) \
28 _ (dport, IP_FLOW_HASH_DST_PORT) \
29 _ (proto, IP_FLOW_HASH_PROTO) \
30 _ (reverse, IP_FLOW_HASH_REVERSE_SRC_DST) \
31 _ (symmetric, IP_FLOW_HASH_SYMMETRIC)
33 #define foreach_flow_hash_bit \
34 _ (src, 0, IP_FLOW_HASH_SRC_ADDR) \
35 _ (dst, 1, IP_FLOW_HASH_DST_ADDR) \
36 _ (sport, 2, IP_FLOW_HASH_SRC_PORT) \
37 _ (dport, 3, IP_FLOW_HASH_DST_PORT) \
38 _ (proto, 4, IP_FLOW_HASH_PROTO) \
39 _ (reverse, 5, IP_FLOW_HASH_REVERSE_SRC_DST) \
40 _ (symmetric, 6, IP_FLOW_HASH_SYMMETRIC) \
41 _ (flowlabel, 7, IP_FLOW_HASH_FL)
44 * A flow hash configuration is a mask of the flow hash options
46 typedef enum flow_hash_config_t_
48 #define _(a, b, c) c = (1 << b),
53 /* Router ID mixed into the flow hash to prevent network polarisation */
54 extern u32 ip_flow_hash_router_id;
56 int ip_flow_hash_set (ip_address_family_t af, u32 table_id,
57 flow_hash_config_t flow_hash_config);
58 void ip_flow_hash_router_id_set (u32 router_id);
60 #endif /* __IP_TYPES_H__ */
63 * fd.io coding-style-patch-verification: ON
66 * eval: (c-set-style "gnu")