blob: 140036012b95224f1e561d9ecb731ddf177e1739 [file] [log] [blame]
Neale Ranns0bfe5d82016-08-25 15:29:12 +01001/*
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:
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
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.
14 */
15
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"
23
24/**
25 * Source initialisation Function
26 */
27static void
28fib_entry_src_interface_init (fib_entry_src_t *src)
29{
Neale Ranns2303cb12018-02-21 04:57:17 -080030 src->u.interface.fesi_cover = FIB_NODE_INDEX_INVALID;
31 src->u.interface.fesi_sibling = FIB_NODE_INDEX_INVALID;
Neale Ranns0bfe5d82016-08-25 15:29:12 +010032}
33
34static void
Neale Ranns9a69a602017-03-26 10:56:33 -070035fib_entry_src_interface_add (fib_entry_src_t *src,
36 const fib_entry_t *entry,
37 fib_entry_flag_t flags,
Neale Rannsda78f952017-05-24 09:15:43 -070038 dpo_proto_t proto,
Neale Ranns9a69a602017-03-26 10:56:33 -070039 const dpo_id_t *dpo)
40{
41 src->fes_pl = fib_path_list_create_special(
42 proto,
43 fib_entry_src_flags_2_path_list_flags(flags),
44 dpo);
45}
46
47static void
48fib_entry_src_interface_remove (fib_entry_src_t *src)
49{
50 src->fes_pl = FIB_NODE_INDEX_INVALID;
51}
52
53static void
Neale Ranns0bfe5d82016-08-25 15:29:12 +010054fib_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)
58{
59 ip_adjacency_t *adj;
60
61 src->fes_pl = fib_path_list_create(pl_flags, paths);
62
63 /*
Paul Vinciguerra8feeaff2019-03-27 11:25:48 -070064 * this is a hack to get the entry's prefix into the glean adjacency
65 * so that it is available for fast retrieval in the switch path.
Neale Ranns0bfe5d82016-08-25 15:29:12 +010066 */
67 if (!(FIB_ENTRY_FLAG_LOCAL & src->fes_entry_flags))
68 {
69 adj = adj_get(fib_path_list_get_adj(
70 src->fes_pl,
71 fib_entry_get_default_chain_type(entry)));
72
Neale Ranns5899fde2016-10-12 13:51:05 +010073 if (IP_LOOKUP_NEXT_GLEAN == adj->lookup_next_index)
Neale Ranns0bfe5d82016-08-25 15:29:12 +010074 {
75 /*
76 * the connected prefix will link to a glean on a non-p2p
Neale Ranns2303cb12018-02-21 04:57:17 -080077 * u.interface.
Neale Ranns0bfe5d82016-08-25 15:29:12 +010078 */
79 adj->sub_type.glean.receive_addr = entry->fe_prefix.fp_addr;
80 }
81 }
82}
83
84/*
85 * Source activate.
86 * Called when the source is teh new longer best source on the entry
87 */
88static int
89fib_entry_src_interface_activate (fib_entry_src_t *src,
90 const fib_entry_t *fib_entry)
91{
92 fib_entry_t *cover;
93
94 if (FIB_ENTRY_FLAG_LOCAL & src->fes_entry_flags)
95 {
96 /*
97 * Track the covering attached/connected cover. This is so that
98 * during an attached export of the cover, this local prefix is
99 * also exported
100 */
Neale Ranns2303cb12018-02-21 04:57:17 -0800101 src->u.interface.fesi_cover =
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100102 fib_table_get_less_specific(fib_entry->fe_fib_index,
103 &fib_entry->fe_prefix);
104
Neale Ranns2303cb12018-02-21 04:57:17 -0800105 ASSERT(FIB_NODE_INDEX_INVALID != src->u.interface.fesi_cover);
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100106
Neale Ranns2303cb12018-02-21 04:57:17 -0800107 cover = fib_entry_get(src->u.interface.fesi_cover);
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100108
Neale Ranns2303cb12018-02-21 04:57:17 -0800109 src->u.interface.fesi_sibling =
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100110 fib_entry_cover_track(cover, fib_entry_get_index(fib_entry));
111 }
112
113 return (!0);
114}
115
116
117/*
118 * Source Deactivate.
119 * Called when the source is no longer best source on the entry
120 */
121static void
122fib_entry_src_interface_deactivate (fib_entry_src_t *src,
123 const fib_entry_t *fib_entry)
124{
125 fib_entry_t *cover;
126
127 /*
Paul Vinciguerra8feeaff2019-03-27 11:25:48 -0700128 * remove the dependency on the covering entry
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100129 */
Neale Ranns2303cb12018-02-21 04:57:17 -0800130 if (FIB_NODE_INDEX_INVALID != src->u.interface.fesi_cover)
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100131 {
Neale Ranns2303cb12018-02-21 04:57:17 -0800132 cover = fib_entry_get(src->u.interface.fesi_cover);
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100133
Neale Ranns2303cb12018-02-21 04:57:17 -0800134 fib_entry_cover_untrack(cover, src->u.interface.fesi_sibling);
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100135
Neale Ranns2303cb12018-02-21 04:57:17 -0800136 src->u.interface.fesi_cover = FIB_NODE_INDEX_INVALID;
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100137 }
138}
139
140static fib_entry_src_cover_res_t
141fib_entry_src_interface_cover_change (fib_entry_src_t *src,
142 const fib_entry_t *fib_entry)
143{
144 fib_entry_src_cover_res_t res = {
145 .install = !0,
146 .bw_reason = FIB_NODE_BW_REASON_FLAG_NONE,
147 };
148
Neale Ranns2303cb12018-02-21 04:57:17 -0800149 if (FIB_NODE_INDEX_INVALID == src->u.interface.fesi_cover)
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100150 {
151 /*
152 * not tracking the cover. surprised we got poked?
153 */
154 return (res);
155 }
156
157 /*
158 * this function is called when this entry's cover has a more specific
159 * entry inserted benaeth it. That does not necessarily mean that this
160 * entry is covered by the new prefix. check that
161 */
Neale Ranns2303cb12018-02-21 04:57:17 -0800162 if (src->u.interface.fesi_cover !=
163 fib_table_get_less_specific(fib_entry->fe_fib_index,
164 &fib_entry->fe_prefix))
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100165 {
166 fib_entry_src_interface_deactivate(src, fib_entry);
167 fib_entry_src_interface_activate(src, fib_entry);
168 }
169 return (res);
170}
171
172static void
173fib_entry_src_interface_installed (fib_entry_src_t *src,
174 const fib_entry_t *fib_entry)
175{
176 /*
177 * The interface source now rules! poke our cover to get exported
178 */
179 fib_entry_t *cover;
180
Neale Ranns2303cb12018-02-21 04:57:17 -0800181 if (FIB_NODE_INDEX_INVALID != src->u.interface.fesi_cover)
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100182 {
Neale Ranns2303cb12018-02-21 04:57:17 -0800183 cover = fib_entry_get(src->u.interface.fesi_cover);
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100184
185 fib_attached_export_covered_added(cover,
186 fib_entry_get_index(fib_entry));
187 }
188}
189
190static u8*
191fib_entry_src_interface_format (fib_entry_src_t *src,
192 u8* s)
193{
Neale Ranns2303cb12018-02-21 04:57:17 -0800194 return (format(s, " cover:%d", src->u.interface.fesi_cover));
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100195}
196
197const static fib_entry_src_vft_t interface_src_vft = {
198 .fesv_init = fib_entry_src_interface_init,
Neale Ranns9a69a602017-03-26 10:56:33 -0700199 .fesv_add = fib_entry_src_interface_add,
200 .fesv_remove = fib_entry_src_interface_remove,
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100201 .fesv_path_swap = fib_entry_src_interface_path_swap,
202 .fesv_activate = fib_entry_src_interface_activate,
203 .fesv_deactivate = fib_entry_src_interface_deactivate,
204 .fesv_format = fib_entry_src_interface_format,
205 .fesv_installed = fib_entry_src_interface_installed,
206 .fesv_cover_change = fib_entry_src_interface_cover_change,
207 /*
208 * not concerned about updates to the cover. the cover will
209 * decide to export or not
210 */
211};
212
213void
214fib_entry_src_interface_register (void)
215{
Neale Ranns3bab8f92019-12-04 06:11:00 +0000216 fib_entry_src_behaviour_register(FIB_SOURCE_BH_INTERFACE,
217 &interface_src_vft);
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100218}