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>
21 * Midchain stacker delegate
23 typedef struct adj_midchain_delegate_t_
26 * the Fib Entry we are stacked on
28 fib_node_index_t amd_fei;
31 * The sibling entry on the FIB entry
34 } adj_midchain_delegate_t;
39 static adj_midchain_delegate_t *amd_pool;
41 static inline const adj_midchain_delegate_t*
42 adj_midchain_from_const_base (const adj_delegate_t *ad)
46 return (pool_elt_at_index(amd_pool, ad->ad_index));
52 adj_midchain_delegate_restack_i (adj_index_t ai,
53 adj_midchain_delegate_t *amd)
55 if (vnet_sw_interface_is_admin_up (vnet_get_main (),
56 adj_get_sw_if_index(ai)) &&
57 (FIB_NODE_INDEX_INVALID != amd->amd_fei))
59 const fib_prefix_t *pfx;
61 pfx = fib_entry_get_prefix(amd->amd_fei);
63 adj_nbr_midchain_stack_on_fib_entry (
66 fib_forw_chain_type_from_fib_proto(pfx->fp_proto));
70 adj_nbr_midchain_unstack (ai);
75 adj_midchain_delegate_restack (adj_index_t ai)
77 adj_midchain_delegate_t *amd;
82 * if there's a delegate already use that
85 ad = adj_delegate_get(adj, ADJ_DELEGATE_MIDCHAIN);
89 amd = pool_elt_at_index(amd_pool, ad->ad_index);
91 adj_midchain_delegate_restack_i(ai, amd);
100 adj_midchain_delegate_stack (adj_index_t ai,
102 const fib_prefix_t *pfx)
104 adj_midchain_delegate_t *amd;
109 * if there's a delegate already use that
112 ad = adj_delegate_get(adj, ADJ_DELEGATE_MIDCHAIN);
116 amd = pool_elt_at_index(amd_pool, ad->ad_index);
120 pool_get(amd_pool, amd);
121 amd->amd_fei = FIB_NODE_INDEX_INVALID;
122 adj_delegate_add(adj, ADJ_DELEGATE_MIDCHAIN, amd - amd_pool);
124 amd->amd_fei = fib_table_entry_special_add(fib_index,
127 FIB_ENTRY_FLAG_NONE);
128 amd->amd_sibling = fib_entry_child_add(amd->amd_fei,
132 adj_midchain_delegate_restack_i(ai, amd);
136 adj_midchain_delegate_unstack (adj_index_t ai)
138 adj_nbr_midchain_unstack(ai);
142 adj_midchain_delegate_adj_deleted (adj_delegate_t *ad)
144 adj_midchain_delegate_t *amd;
146 amd = pool_elt_at_index(amd_pool, ad->ad_index);
148 fib_entry_child_remove (amd->amd_fei, amd->amd_sibling);
149 fib_table_entry_delete_index (amd->amd_fei, FIB_SOURCE_RR);
151 pool_put(amd_pool, amd);
155 * Print a delegate that represents MIDCHAIN tracking
158 adj_midchain_delegate_fmt (const adj_delegate_t *aed, u8 *s)
160 const adj_midchain_delegate_t *amd = adj_midchain_from_const_base(aed);
162 s = format(s, "MIDCHAIN:[fib-entry:%d]", amd->amd_fei);
167 const static adj_delegate_vft_t adj_delegate_vft = {
168 .adv_format = adj_midchain_delegate_fmt,
169 .adv_adj_deleted = adj_midchain_delegate_adj_deleted,
172 static clib_error_t *
173 adj_midchain_delegate_module_init (vlib_main_t * vm)
175 clib_error_t * error = NULL;
177 adj_delegate_register_type (ADJ_DELEGATE_MIDCHAIN, &adj_delegate_vft);
182 VLIB_INIT_FUNCTION (adj_midchain_delegate_module_init);