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 "fib_entry.h"
17 #include "fib_entry_src.h"
18 #include "fib_path_list.h"
19 #include "fib_internal.h"
20 #include "fib_table.h"
21 #include "fib_entry_cover.h"
22 #include "fib_attached_export.h"
25 * Source initialisation Function
28 fib_entry_src_interface_init (fib_entry_src_t *src)
30 src->u.interface.fesi_cover = FIB_NODE_INDEX_INVALID;
31 src->u.interface.fesi_sibling = FIB_NODE_INDEX_INVALID;
35 fib_entry_src_interface_add (fib_entry_src_t *src,
36 const fib_entry_t *entry,
37 fib_entry_flag_t flags,
41 src->fes_pl = fib_path_list_create_special(
43 fib_entry_src_flags_2_path_list_flags(flags),
48 fib_entry_src_interface_remove (fib_entry_src_t *src)
50 src->fes_pl = FIB_NODE_INDEX_INVALID;
54 fib_entry_src_interface_path_swap (fib_entry_src_t *src,
55 const fib_entry_t *entry,
56 fib_path_list_flags_t pl_flags,
57 const fib_route_path_t *paths)
59 fib_node_index_t fib_entry_index;
62 fib_entry_index = fib_entry_get_index(entry);
63 src->fes_pl = fib_path_list_create(pl_flags, paths);
66 * this is a hack to get the entry's prefix into the glean adjacency
67 * so that it is available for fast retrieval in the switch path.
69 if (!(FIB_ENTRY_FLAG_LOCAL & src->fes_entry_flags))
73 ai = fib_path_list_get_adj(src->fes_pl,
74 fib_entry_get_default_chain_type(
75 fib_entry_get(fib_entry_index)));
76 if (INDEX_INVALID != ai)
80 if (IP_LOOKUP_NEXT_GLEAN == adj->lookup_next_index)
83 * the connected prefix will link to a glean on a non-p2p
86 adj->sub_type.glean.receive_addr = entry->fe_prefix.fp_addr;
94 * Called when the source is teh new longer best source on the entry
97 fib_entry_src_interface_activate (fib_entry_src_t *src,
98 const fib_entry_t *fib_entry)
102 if (FIB_ENTRY_FLAG_LOCAL & src->fes_entry_flags)
105 * Track the covering attached/connected cover. This is so that
106 * during an attached export of the cover, this local prefix is
109 src->u.interface.fesi_cover =
110 fib_table_get_less_specific(fib_entry->fe_fib_index,
111 &fib_entry->fe_prefix);
113 ASSERT(FIB_NODE_INDEX_INVALID != src->u.interface.fesi_cover);
115 cover = fib_entry_get(src->u.interface.fesi_cover);
117 src->u.interface.fesi_sibling =
118 fib_entry_cover_track(cover, fib_entry_get_index(fib_entry));
127 * Called when the source is no longer best source on the entry
130 fib_entry_src_interface_deactivate (fib_entry_src_t *src,
131 const fib_entry_t *fib_entry)
136 * remove the dependency on the covering entry
138 if (FIB_NODE_INDEX_INVALID != src->u.interface.fesi_cover)
140 cover = fib_entry_get(src->u.interface.fesi_cover);
142 fib_entry_cover_untrack(cover, src->u.interface.fesi_sibling);
144 src->u.interface.fesi_cover = FIB_NODE_INDEX_INVALID;
148 static fib_entry_src_cover_res_t
149 fib_entry_src_interface_cover_change (fib_entry_src_t *src,
150 const fib_entry_t *fib_entry)
152 fib_entry_src_cover_res_t res = {
154 .bw_reason = FIB_NODE_BW_REASON_FLAG_NONE,
157 if (FIB_NODE_INDEX_INVALID == src->u.interface.fesi_cover)
160 * not tracking the cover. surprised we got poked?
166 * this function is called when this entry's cover has a more specific
167 * entry inserted benaeth it. That does not necessarily mean that this
168 * entry is covered by the new prefix. check that
170 if (src->u.interface.fesi_cover !=
171 fib_table_get_less_specific(fib_entry->fe_fib_index,
172 &fib_entry->fe_prefix))
174 fib_entry_src_interface_deactivate(src, fib_entry);
175 fib_entry_src_interface_activate(src, fib_entry);
181 fib_entry_src_interface_installed (fib_entry_src_t *src,
182 const fib_entry_t *fib_entry)
185 * The interface source now rules! poke our cover to get exported
189 if (FIB_NODE_INDEX_INVALID != src->u.interface.fesi_cover)
191 cover = fib_entry_get(src->u.interface.fesi_cover);
193 fib_attached_export_covered_added(cover,
194 fib_entry_get_index(fib_entry));
199 fib_entry_src_interface_format (fib_entry_src_t *src,
202 return (format(s, " cover:%d", src->u.interface.fesi_cover));
205 const static fib_entry_src_vft_t interface_src_vft = {
206 .fesv_init = fib_entry_src_interface_init,
207 .fesv_add = fib_entry_src_interface_add,
208 .fesv_remove = fib_entry_src_interface_remove,
209 .fesv_path_swap = fib_entry_src_interface_path_swap,
210 .fesv_activate = fib_entry_src_interface_activate,
211 .fesv_deactivate = fib_entry_src_interface_deactivate,
212 .fesv_format = fib_entry_src_interface_format,
213 .fesv_installed = fib_entry_src_interface_installed,
214 .fesv_cover_change = fib_entry_src_interface_cover_change,
216 * not concerned about updates to the cover. the cover will
217 * decide to export or not
222 fib_entry_src_interface_register (void)
224 fib_entry_src_behaviour_register(FIB_SOURCE_BH_INTERFACE,