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>
28 #include <vnet/mpls/mpls_types.h>
33 typedef struct replicate_main_t_
35 vlib_combined_counter_main_t repm_counters;
37 /* per-cpu vector of cloned packets */
41 extern replicate_main_t replicate_main;
44 * The number of buckets that a replicate object can have
45 * This must not overflow the rep_n_buckets field
47 #define REP_MAX_BUCKETS 1024
50 * The number of buckets that a load-balance object can have and still
51 * fit in one cache-line
53 #define REP_NUM_INLINE_BUCKETS 4
56 * Flags on the replicate DPO
58 typedef enum replicate_flags_t_
61 REPLICATE_FLAGS_HAS_LOCAL,
62 } __clib_packed replicate_flags_t;
65 * The FIB DPO provieds;
66 * - load-balancing over the next DPOs in the chain/graph
67 * - per-route counters
69 typedef struct replicate_t_ {
71 * required for pool_get_aligned.
72 * memebers used in the switch path come first!
74 CLIB_CACHE_LINE_ALIGN_MARK(cacheline0);
77 * number of buckets in the replicate.
82 * The protocol of packets that traverse this REP.
83 * need in combination with the flow hash config to determine how to hash.
86 dpo_proto_t rep_proto;
89 * Flags specifying the replicate properties/behaviour
91 replicate_flags_t rep_flags;
94 * The number of locks, which is approximately the number of users,
95 * of this load-balance.
96 * Load-balance objects of via-entries are heavily shared by recursives,
97 * so the lock count is a u32.
102 * Vector of buckets containing the next DPOs, sized as repo_num
104 dpo_id_t *rep_buckets;
107 * The rest of the cache line is used for buckets. In the common case
108 * where there there are less than 4 buckets, then the buckets are
109 * on the same cachlie and we save ourselves a pointer dereferance in
112 dpo_id_t rep_buckets_inline[REP_NUM_INLINE_BUCKETS];
115 STATIC_ASSERT(sizeof(replicate_t) <= CLIB_CACHE_LINE_BYTES,
116 "A replicate object size exceeds one cacheline");
117 STATIC_ASSERT (REP_MAX_BUCKETS <= CLIB_U16_MAX,
118 "Too many buckets for replicate object");
121 * Flags controlling load-balance formatting/display
123 typedef enum replicate_format_flags_t_ {
124 REPLICATE_FORMAT_NONE,
125 REPLICATE_FORMAT_DETAIL = (1 << 0),
126 } replicate_format_flags_t;
128 extern index_t replicate_create(u32 num_buckets,
129 dpo_proto_t rep_proto);
130 extern void replicate_multipath_update(
132 load_balance_path_t *next_hops);
134 extern void replicate_set_bucket(index_t repi,
136 const dpo_id_t *next);
138 extern u8* format_replicate(u8 * s, va_list * args);
140 extern const dpo_id_t *replicate_get_bucket(index_t repi,
142 extern int replicate_is_drop(const dpo_id_t *dpo);
144 extern u16 replicate_n_buckets(index_t repi);
146 extern index_t replicate_dup(replicate_flags_t flags,
150 * The encapsulation breakages are for fast DP access
152 extern replicate_t *replicate_pool;
153 static inline replicate_t*
154 replicate_get (index_t repi)
156 repi &= ~MPLS_IS_REPLICATE;
157 return (pool_elt_at_index(replicate_pool, repi));
160 #define REP_HAS_INLINE_BUCKETS(_rep) \
161 ((_rep)->rep_n_buckets <= REP_NUM_INLINE_BUCKETS)
163 static inline const dpo_id_t *
164 replicate_get_bucket_i (const replicate_t *rep,
167 ASSERT(bucket < rep->rep_n_buckets);
169 if (PREDICT_TRUE(REP_HAS_INLINE_BUCKETS(rep)))
171 return (&rep->rep_buckets_inline[bucket]);
175 return (&rep->rep_buckets[bucket]);
179 extern void replicate_module_init(void);