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.
16 #include <vnet/adj/adj_delegate.h>
17 #include <vnet/adj/adj_midchain.h>
18 #include <vnet/fib/fib_table.h>
19 #include <vnet/fib/fib_entry_track.h>
22 * Midchain stacker delegate
24 typedef struct adj_midchain_delegate_t_
27 * the Fib Entry we are stacked on
29 fib_node_index_t amd_fei;
32 * The sibling entry on the FIB entry
35 } adj_midchain_delegate_t;
40 static adj_midchain_delegate_t *amd_pool;
42 static inline const adj_midchain_delegate_t*
43 adj_midchain_from_const_base (const adj_delegate_t *ad)
47 return (pool_elt_at_index(amd_pool, ad->ad_index));
53 adj_midchain_delegate_restack_i (adj_index_t ai,
54 adj_midchain_delegate_t *amd)
56 if (vnet_sw_interface_is_admin_up (vnet_get_main (),
57 adj_get_sw_if_index(ai)) &&
58 (FIB_NODE_INDEX_INVALID != amd->amd_fei))
60 const fib_prefix_t *pfx;
62 pfx = fib_entry_get_prefix(amd->amd_fei);
64 adj_nbr_midchain_stack_on_fib_entry (
67 fib_forw_chain_type_from_fib_proto(pfx->fp_proto));
71 adj_nbr_midchain_unstack (ai);
76 adj_midchain_delegate_restack (adj_index_t ai)
78 adj_midchain_delegate_t *amd;
83 * if there's a delegate already use that
86 ad = adj_delegate_get(adj, ADJ_DELEGATE_MIDCHAIN);
90 amd = pool_elt_at_index(amd_pool, ad->ad_index);
92 adj_midchain_delegate_restack_i(ai, amd);
101 adj_midchain_delegate_stack (adj_index_t ai,
103 const fib_prefix_t *pfx)
105 adj_midchain_delegate_t *amd;
110 * if there's a delegate already use that
113 ad = adj_delegate_get(adj, ADJ_DELEGATE_MIDCHAIN);
117 amd = pool_elt_at_index(amd_pool, ad->ad_index);
121 pool_get(amd_pool, amd);
122 amd->amd_fei = FIB_NODE_INDEX_INVALID;
123 adj_delegate_add(adj, ADJ_DELEGATE_MIDCHAIN, amd - amd_pool);
125 amd->amd_fei = fib_entry_track(fib_index,
131 adj_midchain_delegate_restack_i(ai, amd);
135 adj_midchain_delegate_unstack (adj_index_t ai)
137 adj_nbr_midchain_unstack(ai);
141 adj_midchain_delegate_adj_deleted (adj_delegate_t *ad)
143 adj_midchain_delegate_t *amd;
145 amd = pool_elt_at_index(amd_pool, ad->ad_index);
147 fib_entry_untrack(amd->amd_fei, amd->amd_sibling);
149 pool_put(amd_pool, amd);
153 * Print a delegate that represents MIDCHAIN tracking
156 adj_midchain_delegate_fmt (const adj_delegate_t *aed, u8 *s)
158 const adj_midchain_delegate_t *amd = adj_midchain_from_const_base(aed);
160 s = format(s, "MIDCHAIN:[fib-entry:%d]", amd->amd_fei);
165 const static adj_delegate_vft_t adj_delegate_vft = {
166 .adv_format = adj_midchain_delegate_fmt,
167 .adv_adj_deleted = adj_midchain_delegate_adj_deleted,
170 static clib_error_t *
171 adj_midchain_delegate_module_init (vlib_main_t * vm)
173 clib_error_t * error = NULL;
175 adj_delegate_register_type (ADJ_DELEGATE_MIDCHAIN, &adj_delegate_vft);
180 VLIB_INIT_FUNCTION (adj_midchain_delegate_module_init);