2 * Copyright (c) 2017-2019 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 #include <vnet/session/session_table.h>
17 #include <vnet/session/session.h>
20 * Pool of session tables
22 static session_table_t *lookup_tables;
25 _get_session_tables (void)
31 session_table_alloc (void)
34 pool_get_aligned (lookup_tables, slt, CLIB_CACHE_LINE_BYTES);
35 clib_memset (slt, 0, sizeof (*slt));
40 session_table_index (session_table_t * slt)
42 return (slt - lookup_tables);
46 session_table_get (u32 table_index)
48 if (pool_is_free_index (lookup_tables, table_index))
50 return pool_elt_at_index (lookup_tables, table_index);
53 #define foreach_hash_table_parameter \
54 _(v4,session,buckets,20000) \
55 _(v4,session,memory,(64<<20)) \
56 _(v6,session,buckets,20000) \
57 _(v6,session,memory,(64<<20)) \
58 _(v4,halfopen,buckets,20000) \
59 _(v4,halfopen,memory,(64<<20)) \
60 _(v6,halfopen,buckets,20000) \
61 _(v6,halfopen,memory,(64<<20))
64 * Initialize session table hash tables
66 * If vpp configured with set of table parameters it uses them,
67 * otherwise it uses defaults above.
70 session_table_init (session_table_t * slt, u8 fib_proto)
72 u8 all = fib_proto > FIB_PROTOCOL_IP6 ? 1 : 0;
75 #define _(af,table,parm,value) \
76 u32 configured_##af##_##table##_table_##parm = value;
77 foreach_hash_table_parameter;
80 #define _(af,table,parm,value) \
81 if (session_main.configured_##af##_##table##_table_##parm) \
82 configured_##af##_##table##_table_##parm = \
83 session_main.configured_##af##_##table##_table_##parm;
84 foreach_hash_table_parameter;
87 if (fib_proto == FIB_PROTOCOL_IP4 || all)
89 clib_bihash_init2_args_16_8_t _a, *a = &_a;
91 memset (a, 0, sizeof (*a));
92 a->h = &slt->v4_session_hash;
93 a->name = "v4 session table";
94 a->nbuckets = configured_v4_session_table_buckets;
95 a->memory_size = configured_v4_session_table_memory;
96 a->dont_add_to_all_bihash_list = 1;
97 a->instantiate_immediately = 1;
98 clib_bihash_init2_16_8 (a);
100 memset (a, 0, sizeof (*a));
101 a->h = &slt->v4_half_open_hash;
102 a->name = "v4 half-open table";
103 a->nbuckets = configured_v4_halfopen_table_buckets;
104 a->memory_size = configured_v4_halfopen_table_memory;
105 a->dont_add_to_all_bihash_list = 1;
106 a->instantiate_immediately = 1;
107 clib_bihash_init2_16_8 (a);
109 if (fib_proto == FIB_PROTOCOL_IP6 || all)
111 clib_bihash_init2_args_48_8_t _a, *a = &_a;
113 memset (a, 0, sizeof (*a));
114 a->h = &slt->v6_session_hash;
115 a->name = "v6 session table";
116 a->nbuckets = configured_v6_session_table_buckets;
117 a->memory_size = configured_v6_session_table_memory;
118 a->dont_add_to_all_bihash_list = 1;
119 a->instantiate_immediately = 1;
120 clib_bihash_init2_48_8 (a);
122 memset (a, 0, sizeof (*a));
123 a->h = &slt->v6_half_open_hash;
124 a->name = "v6 half-open table";
125 a->nbuckets = configured_v6_halfopen_table_buckets;
126 a->memory_size = configured_v6_halfopen_table_memory;
127 a->dont_add_to_all_bihash_list = 1;
128 a->instantiate_immediately = 1;
129 clib_bihash_init2_48_8 (a);
132 for (i = 0; i < TRANSPORT_N_PROTO; i++)
133 session_rules_table_init (&slt->session_rules[i]);
136 typedef struct _ip4_session_table_walk_ctx_t
138 ip4_session_table_walk_fn_t fn;
140 } ip4_session_table_walk_ctx_t;
143 ip4_session_table_walk_cb (clib_bihash_kv_16_8_t * kvp, void *arg)
145 ip4_session_table_walk_ctx_t *ctx = arg;
146 ctx->fn (kvp, ctx->ctx);
147 return (BIHASH_WALK_CONTINUE);
151 ip4_session_table_walk (clib_bihash_16_8_t * hash,
152 ip4_session_table_walk_fn_t fn, void *arg)
154 ip4_session_table_walk_ctx_t ctx = {
158 clib_bihash_foreach_key_value_pair_16_8 (hash, ip4_session_table_walk_cb,
164 * fd.io coding-style-patch-verification: ON
167 * eval: (c-set-style "gnu")