2 * Copyright (c) 2016 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.
20 #ifndef __REPLICATE_DPO_H__
21 #define __REPLICATE_DPO_H__
23 #include <vlib/vlib.h>
24 #include <vnet/ip/lookup.h>
25 #include <vnet/dpo/dpo.h>
26 #include <vnet/dpo/load_balance.h>
27 #include <vnet/fib/fib_types.h>
32 typedef struct replicate_main_t_
34 vlib_combined_counter_main_t repm_counters;
37 extern replicate_main_t replicate_main;
40 * The number of buckets that a load-balance object can have and still
41 * fit in one cache-line
43 #define REP_NUM_INLINE_BUCKETS 4
46 * The FIB DPO provieds;
47 * - load-balancing over the next DPOs in the chain/graph
48 * - per-route counters
50 typedef struct replicate_t_ {
52 * number of buckets in the load-balance. always a power of 2.
57 * The protocol of packets that traverse this REP.
58 * need in combination with the flow hash config to determine how to hash.
61 dpo_proto_t rep_proto;
64 * The number of locks, which is approximately the number of users,
65 * of this load-balance.
66 * Load-balance objects of via-entries are heavily shared by recursives,
67 * so the lock count is a u32.
72 * Vector of buckets containing the next DPOs, sized as repo_num
74 dpo_id_t *rep_buckets;
77 * The rest of the cache line is used for buckets. In the common case
78 * where there there are less than 4 buckets, then the buckets are
79 * on the same cachlie and we save ourselves a pointer dereferance in
82 dpo_id_t rep_buckets_inline[REP_NUM_INLINE_BUCKETS];
85 STATIC_ASSERT(sizeof(replicate_t) <= CLIB_CACHE_LINE_BYTES,
86 "A replicate object size exceeds one cachline");
89 * Flags controlling load-balance formatting/display
91 typedef enum replicate_format_flags_t_ {
92 REPLICATE_FORMAT_NONE,
93 REPLICATE_FORMAT_DETAIL = (1 << 0),
94 } replicate_format_flags_t;
96 extern index_t replicate_create(u32 num_buckets,
97 dpo_proto_t rep_proto);
98 extern void replicate_multipath_update(
100 load_balance_path_t *next_hops);
102 extern void replicate_set_bucket(index_t repi,
104 const dpo_id_t *next);
106 extern u8* format_replicate(u8 * s, va_list * args);
108 extern const dpo_id_t *replicate_get_bucket(index_t repi,
110 extern int replicate_is_drop(const dpo_id_t *dpo);
113 * The encapsulation breakages are for fast DP access
115 extern replicate_t *replicate_pool;
116 static inline replicate_t*
117 replicate_get (index_t repi)
119 return (pool_elt_at_index(replicate_pool, repi));
122 #define REP_HAS_INLINE_BUCKETS(_rep) \
123 ((_rep)->rep_n_buckets <= REP_NUM_INLINE_BUCKETS)
125 static inline const dpo_id_t *
126 replicate_get_bucket_i (const replicate_t *rep,
129 ASSERT(bucket < rep->rep_n_buckets);
131 if (PREDICT_TRUE(REP_HAS_INLINE_BUCKETS(rep)))
133 return (&rep->rep_buckets_inline[bucket]);
137 return (&rep->rep_buckets[bucket]);
141 extern void replicate_module_init(void);