Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1 | /* |
| 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 <vnet/adj/adj.h> |
| 17 | #include <vnet/dpo/load_balance.h> |
| 18 | #include <vnet/dpo/mpls_label_dpo.h> |
| 19 | #include <vnet/dpo/drop_dpo.h> |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 20 | #include <vnet/dpo/replicate_dpo.h> |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 21 | |
Neale Ranns | 3ee4404 | 2016-10-03 13:05:48 +0100 | [diff] [blame] | 22 | #include <vnet/fib/fib_entry_src.h> |
| 23 | #include <vnet/fib/fib_table.h> |
| 24 | #include <vnet/fib/fib_path_ext.h> |
| 25 | #include <vnet/fib/fib_urpf_list.h> |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 26 | |
| 27 | /* |
| 28 | * per-source type vft |
| 29 | */ |
| 30 | static fib_entry_src_vft_t fib_entry_src_vft[FIB_SOURCE_MAX]; |
| 31 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 32 | void |
| 33 | fib_entry_src_register (fib_source_t source, |
| 34 | const fib_entry_src_vft_t *vft) |
| 35 | { |
| 36 | fib_entry_src_vft[source] = *vft; |
| 37 | } |
| 38 | |
| 39 | static int |
| 40 | fib_entry_src_cmp_for_sort (void * v1, |
| 41 | void * v2) |
| 42 | { |
| 43 | fib_entry_src_t *esrc1 = v1, *esrc2 = v2; |
| 44 | |
| 45 | return (esrc1->fes_src - esrc2->fes_src); |
| 46 | } |
| 47 | |
| 48 | void |
| 49 | fib_entry_src_action_init (fib_entry_t *fib_entry, |
| 50 | fib_source_t source) |
| 51 | |
| 52 | { |
| 53 | fib_entry_src_t esrc = { |
| 54 | .fes_pl = FIB_NODE_INDEX_INVALID, |
| 55 | .fes_flags = FIB_ENTRY_SRC_FLAG_NONE, |
| 56 | .fes_src = source, |
| 57 | }; |
| 58 | |
| 59 | if (NULL != fib_entry_src_vft[source].fesv_init) |
| 60 | { |
| 61 | fib_entry_src_vft[source].fesv_init(&esrc); |
| 62 | } |
| 63 | |
Neale Ranns | a4e7766 | 2017-12-04 20:00:30 +0000 | [diff] [blame] | 64 | vec_add1(fib_entry->fe_srcs, esrc); |
| 65 | vec_sort_with_function(fib_entry->fe_srcs, |
| 66 | fib_entry_src_cmp_for_sort); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 67 | } |
| 68 | |
| 69 | static fib_entry_src_t * |
Neale Ranns | a4e7766 | 2017-12-04 20:00:30 +0000 | [diff] [blame] | 70 | fib_entry_src_find (const fib_entry_t *fib_entry, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 71 | fib_source_t source, |
| 72 | u32 *index) |
| 73 | |
| 74 | { |
| 75 | fib_entry_src_t *esrc; |
| 76 | int ii; |
| 77 | |
| 78 | ii = 0; |
Neale Ranns | a4e7766 | 2017-12-04 20:00:30 +0000 | [diff] [blame] | 79 | vec_foreach(esrc, fib_entry->fe_srcs) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 80 | { |
Neale Ranns | a4e7766 | 2017-12-04 20:00:30 +0000 | [diff] [blame] | 81 | if (esrc->fes_src == source) |
| 82 | { |
| 83 | if (NULL != index) |
| 84 | { |
| 85 | *index = ii; |
| 86 | } |
| 87 | return (esrc); |
| 88 | } |
| 89 | else |
| 90 | { |
| 91 | ii++; |
| 92 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 93 | } |
| 94 | |
| 95 | return (NULL); |
| 96 | } |
| 97 | |
| 98 | int |
| 99 | fib_entry_is_sourced (fib_node_index_t fib_entry_index, |
| 100 | fib_source_t source) |
| 101 | { |
| 102 | fib_entry_t *fib_entry; |
| 103 | |
| 104 | fib_entry = fib_entry_get(fib_entry_index); |
| 105 | |
| 106 | return (NULL != fib_entry_src_find(fib_entry, source, NULL)); |
| 107 | } |
| 108 | |
| 109 | static fib_entry_src_t * |
| 110 | fib_entry_src_find_or_create (fib_entry_t *fib_entry, |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 111 | fib_source_t source) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 112 | { |
| 113 | fib_entry_src_t *esrc; |
| 114 | |
| 115 | esrc = fib_entry_src_find(fib_entry, source, NULL); |
| 116 | |
| 117 | if (NULL == esrc) |
| 118 | { |
| 119 | fib_entry_src_action_init(fib_entry, source); |
| 120 | } |
| 121 | |
| 122 | return (fib_entry_src_find(fib_entry, source, NULL)); |
| 123 | } |
| 124 | |
| 125 | void |
| 126 | fib_entry_src_action_deinit (fib_entry_t *fib_entry, |
| 127 | fib_source_t source) |
| 128 | |
| 129 | { |
| 130 | fib_entry_src_t *esrc; |
| 131 | u32 index = ~0; |
| 132 | |
| 133 | esrc = fib_entry_src_find(fib_entry, source, &index); |
| 134 | |
| 135 | ASSERT(NULL != esrc); |
| 136 | |
| 137 | if (NULL != fib_entry_src_vft[source].fesv_deinit) |
| 138 | { |
| 139 | fib_entry_src_vft[source].fesv_deinit(esrc); |
| 140 | } |
| 141 | |
Neale Ranns | 8142499 | 2017-05-18 03:03:22 -0700 | [diff] [blame] | 142 | fib_path_ext_list_flush(&esrc->fes_path_exts); |
Neale Ranns | a4e7766 | 2017-12-04 20:00:30 +0000 | [diff] [blame] | 143 | vec_del1(fib_entry->fe_srcs, index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 144 | } |
| 145 | |
| 146 | fib_entry_src_cover_res_t |
| 147 | fib_entry_src_action_cover_change (fib_entry_t *fib_entry, |
| 148 | fib_source_t source) |
| 149 | { |
| 150 | if (NULL != fib_entry_src_vft[source].fesv_cover_change) |
| 151 | { |
| 152 | return (fib_entry_src_vft[source].fesv_cover_change( |
| 153 | fib_entry_src_find(fib_entry, source, NULL), |
| 154 | fib_entry)); |
| 155 | } |
| 156 | |
| 157 | fib_entry_src_cover_res_t res = { |
| 158 | .install = !0, |
| 159 | .bw_reason = FIB_NODE_BW_REASON_FLAG_NONE, |
| 160 | }; |
| 161 | return (res); |
| 162 | } |
| 163 | |
| 164 | fib_entry_src_cover_res_t |
| 165 | fib_entry_src_action_cover_update (fib_entry_t *fib_entry, |
| 166 | fib_source_t source) |
| 167 | { |
| 168 | if (NULL != fib_entry_src_vft[source].fesv_cover_update) |
| 169 | { |
| 170 | return (fib_entry_src_vft[source].fesv_cover_update( |
| 171 | fib_entry_src_find(fib_entry, source, NULL), |
| 172 | fib_entry)); |
| 173 | } |
| 174 | |
| 175 | fib_entry_src_cover_res_t res = { |
| 176 | .install = !0, |
| 177 | .bw_reason = FIB_NODE_BW_REASON_FLAG_NONE, |
| 178 | }; |
| 179 | return (res); |
| 180 | } |
| 181 | |
| 182 | typedef struct fib_entry_src_collect_forwarding_ctx_t_ |
| 183 | { |
Neale Ranns | 8142499 | 2017-05-18 03:03:22 -0700 | [diff] [blame] | 184 | load_balance_path_t *next_hops; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 185 | const fib_entry_t *fib_entry; |
| 186 | const fib_entry_src_t *esrc; |
| 187 | fib_forward_chain_type_t fct; |
Neale Ranns | f12a83f | 2017-04-18 09:09:40 -0700 | [diff] [blame] | 188 | int n_recursive_constrained; |
Neale Ranns | 57b5860 | 2017-07-15 07:37:25 -0700 | [diff] [blame] | 189 | u16 preference; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 190 | } fib_entry_src_collect_forwarding_ctx_t; |
| 191 | |
| 192 | /** |
| 193 | * @brief Determine whether this FIB entry should use a load-balance MAP |
| 194 | * to support PIC edge fast convergence |
| 195 | */ |
| 196 | load_balance_flags_t |
| 197 | fib_entry_calc_lb_flags (fib_entry_src_collect_forwarding_ctx_t *ctx) |
| 198 | { |
| 199 | /** |
Neale Ranns | f12a83f | 2017-04-18 09:09:40 -0700 | [diff] [blame] | 200 | * We'll use a LB map if the path-list has multiple recursive paths. |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 201 | * recursive paths implies BGP, and hence scale. |
| 202 | */ |
Neale Ranns | f12a83f | 2017-04-18 09:09:40 -0700 | [diff] [blame] | 203 | if (ctx->n_recursive_constrained > 1 && |
| 204 | fib_path_list_is_popular(ctx->esrc->fes_pl)) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 205 | { |
| 206 | return (LOAD_BALANCE_FLAG_USES_MAP); |
| 207 | } |
| 208 | return (LOAD_BALANCE_FLAG_NONE); |
| 209 | } |
| 210 | |
| 211 | static int |
| 212 | fib_entry_src_valid_out_label (mpls_label_t label) |
| 213 | { |
| 214 | return ((MPLS_LABEL_IS_REAL(label) || |
Neale Ranns | 31ed744 | 2018-02-23 05:29:09 -0800 | [diff] [blame] | 215 | MPLS_LABEL_POP == label || |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 216 | MPLS_IETF_IPV4_EXPLICIT_NULL_LABEL == label || |
| 217 | MPLS_IETF_IPV6_EXPLICIT_NULL_LABEL == label || |
| 218 | MPLS_IETF_IMPLICIT_NULL_LABEL == label)); |
| 219 | } |
| 220 | |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 221 | /** |
| 222 | * @brief Turn the chain type requested by the client into the one they |
| 223 | * really wanted |
| 224 | */ |
| 225 | fib_forward_chain_type_t |
| 226 | fib_entry_chain_type_fixup (const fib_entry_t *entry, |
| 227 | fib_forward_chain_type_t fct) |
| 228 | { |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 229 | /* |
| 230 | * The EOS chain is a tricky since one cannot know the adjacency |
| 231 | * to link to without knowing what the packets payload protocol |
| 232 | * will be once the label is popped. |
| 233 | */ |
| 234 | fib_forward_chain_type_t dfct; |
| 235 | |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 236 | if (FIB_FORW_CHAIN_TYPE_MPLS_EOS != fct) |
| 237 | { |
| 238 | return (fct); |
| 239 | } |
| 240 | |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 241 | dfct = fib_entry_get_default_chain_type(entry); |
| 242 | |
| 243 | if (FIB_FORW_CHAIN_TYPE_MPLS_EOS == dfct) |
| 244 | { |
| 245 | /* |
| 246 | * If the entry being asked is a eos-MPLS label entry, |
| 247 | * then use the payload-protocol field, that we stashed there |
| 248 | * for just this purpose |
| 249 | */ |
| 250 | return (fib_forw_chain_type_from_dpo_proto( |
| 251 | entry->fe_prefix.fp_payload_proto)); |
| 252 | } |
| 253 | /* |
| 254 | * else give them what this entry would be by default. i.e. if it's a v6 |
| 255 | * entry, then the label its local labelled should be carrying v6 traffic. |
| 256 | * If it's a non-EOS label entry, then there are more labels and we want |
| 257 | * a non-eos chain. |
| 258 | */ |
| 259 | return (dfct); |
| 260 | } |
| 261 | |
Neale Ranns | 62fe07c | 2017-10-31 12:28:22 -0700 | [diff] [blame] | 262 | static dpo_proto_t |
| 263 | fib_prefix_get_payload_proto (const fib_prefix_t *pfx) |
| 264 | { |
| 265 | switch (pfx->fp_proto) |
| 266 | { |
| 267 | case FIB_PROTOCOL_IP4: |
| 268 | return (DPO_PROTO_IP4); |
| 269 | case FIB_PROTOCOL_IP6: |
| 270 | return (DPO_PROTO_IP6); |
| 271 | case FIB_PROTOCOL_MPLS: |
| 272 | return (pfx->fp_payload_proto); |
| 273 | } |
| 274 | |
| 275 | ASSERT(0); |
| 276 | return (DPO_PROTO_IP4); |
| 277 | } |
| 278 | |
Neale Ranns | 8142499 | 2017-05-18 03:03:22 -0700 | [diff] [blame] | 279 | static void |
| 280 | fib_entry_src_get_path_forwarding (fib_node_index_t path_index, |
| 281 | fib_entry_src_collect_forwarding_ctx_t *ctx) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 282 | { |
Neale Ranns | 8142499 | 2017-05-18 03:03:22 -0700 | [diff] [blame] | 283 | load_balance_path_t *nh; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 284 | |
| 285 | /* |
Neale Ranns | 8142499 | 2017-05-18 03:03:22 -0700 | [diff] [blame] | 286 | * no extension => no out-going label for this path. that's OK |
| 287 | * in the case of an IP or EOS chain, but not for non-EOS |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 288 | */ |
Neale Ranns | 8142499 | 2017-05-18 03:03:22 -0700 | [diff] [blame] | 289 | switch (ctx->fct) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 290 | { |
Neale Ranns | 8142499 | 2017-05-18 03:03:22 -0700 | [diff] [blame] | 291 | case FIB_FORW_CHAIN_TYPE_UNICAST_IP4: |
| 292 | case FIB_FORW_CHAIN_TYPE_UNICAST_IP6: |
| 293 | case FIB_FORW_CHAIN_TYPE_MCAST_IP4: |
| 294 | case FIB_FORW_CHAIN_TYPE_MCAST_IP6: |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 295 | case FIB_FORW_CHAIN_TYPE_BIER: |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 296 | /* |
Neale Ranns | 8142499 | 2017-05-18 03:03:22 -0700 | [diff] [blame] | 297 | * EOS traffic with no label to stack, we need the IP Adj |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 298 | */ |
Neale Ranns | 8142499 | 2017-05-18 03:03:22 -0700 | [diff] [blame] | 299 | vec_add2(ctx->next_hops, nh, 1); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 300 | |
Neale Ranns | 8142499 | 2017-05-18 03:03:22 -0700 | [diff] [blame] | 301 | nh->path_index = path_index; |
| 302 | nh->path_weight = fib_path_get_weight(path_index); |
| 303 | fib_path_contribute_forwarding(path_index, ctx->fct, &nh->path_dpo); |
| 304 | |
| 305 | break; |
| 306 | case FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS: |
| 307 | if (fib_path_is_exclusive(path_index) || |
| 308 | fib_path_is_deag(path_index)) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 309 | { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 310 | vec_add2(ctx->next_hops, nh, 1); |
| 311 | |
| 312 | nh->path_index = path_index; |
| 313 | nh->path_weight = fib_path_get_weight(path_index); |
Neale Ranns | 8142499 | 2017-05-18 03:03:22 -0700 | [diff] [blame] | 314 | fib_path_contribute_forwarding(path_index, |
| 315 | FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS, |
| 316 | &nh->path_dpo); |
| 317 | } |
| 318 | break; |
| 319 | case FIB_FORW_CHAIN_TYPE_MPLS_EOS: |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 320 | { |
| 321 | /* |
| 322 | * no label. we need a chain based on the payload. fixup. |
| 323 | */ |
| 324 | vec_add2(ctx->next_hops, nh, 1); |
| 325 | |
| 326 | nh->path_index = path_index; |
| 327 | nh->path_weight = fib_path_get_weight(path_index); |
| 328 | fib_path_contribute_forwarding(path_index, |
| 329 | fib_entry_chain_type_fixup(ctx->fib_entry, |
| 330 | ctx->fct), |
| 331 | &nh->path_dpo); |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 332 | fib_path_stack_mpls_disp(path_index, |
Neale Ranns | 62fe07c | 2017-10-31 12:28:22 -0700 | [diff] [blame] | 333 | fib_prefix_get_payload_proto(&ctx->fib_entry->fe_prefix), |
Neale Ranns | 31ed744 | 2018-02-23 05:29:09 -0800 | [diff] [blame] | 334 | FIB_MPLS_LSP_MODE_PIPE, |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 335 | &nh->path_dpo); |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 336 | |
| 337 | break; |
| 338 | } |
Neale Ranns | 8142499 | 2017-05-18 03:03:22 -0700 | [diff] [blame] | 339 | case FIB_FORW_CHAIN_TYPE_ETHERNET: |
| 340 | case FIB_FORW_CHAIN_TYPE_NSH: |
| 341 | ASSERT(0); |
| 342 | break; |
| 343 | } |
| 344 | } |
| 345 | |
| 346 | static fib_path_list_walk_rc_t |
| 347 | fib_entry_src_collect_forwarding (fib_node_index_t pl_index, |
| 348 | fib_node_index_t path_index, |
| 349 | void *arg) |
| 350 | { |
| 351 | fib_entry_src_collect_forwarding_ctx_t *ctx; |
| 352 | fib_path_ext_t *path_ext; |
| 353 | |
| 354 | ctx = arg; |
| 355 | |
| 356 | /* |
| 357 | * if the path is not resolved, don't include it. |
| 358 | */ |
| 359 | if (!fib_path_is_resolved(path_index)) |
| 360 | { |
| 361 | return (FIB_PATH_LIST_WALK_CONTINUE); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 362 | } |
| 363 | |
Neale Ranns | 8142499 | 2017-05-18 03:03:22 -0700 | [diff] [blame] | 364 | if (fib_path_is_recursive_constrained(path_index)) |
| 365 | { |
| 366 | ctx->n_recursive_constrained += 1; |
| 367 | } |
Neale Ranns | 57b5860 | 2017-07-15 07:37:25 -0700 | [diff] [blame] | 368 | if (0xffff == ctx->preference) |
| 369 | { |
| 370 | /* |
| 371 | * not set a preference yet, so the first path we encounter |
| 372 | * sets the preference we are collecting. |
| 373 | */ |
| 374 | ctx->preference = fib_path_get_preference(path_index); |
| 375 | } |
| 376 | else if (ctx->preference != fib_path_get_preference(path_index)) |
| 377 | { |
| 378 | /* |
| 379 | * this path does not belong to the same preference as the |
| 380 | * previous paths encountered. we are done now. |
| 381 | */ |
| 382 | return (FIB_PATH_LIST_WALK_STOP); |
| 383 | } |
Neale Ranns | 8142499 | 2017-05-18 03:03:22 -0700 | [diff] [blame] | 384 | |
| 385 | /* |
| 386 | * get the matching path-extension for the path being visited. |
| 387 | */ |
| 388 | path_ext = fib_path_ext_list_find_by_path_index(&ctx->esrc->fes_path_exts, |
| 389 | path_index); |
| 390 | |
| 391 | if (NULL != path_ext) |
| 392 | { |
| 393 | switch (path_ext->fpe_type) |
| 394 | { |
| 395 | case FIB_PATH_EXT_MPLS: |
Neale Ranns | 31ed744 | 2018-02-23 05:29:09 -0800 | [diff] [blame] | 396 | if (fib_entry_src_valid_out_label(path_ext->fpe_label_stack[0].fml_value)) |
Neale Ranns | 8142499 | 2017-05-18 03:03:22 -0700 | [diff] [blame] | 397 | { |
| 398 | /* |
| 399 | * found a matching extension. stack it to obtain the forwarding |
| 400 | * info for this path. |
| 401 | */ |
| 402 | ctx->next_hops = |
| 403 | fib_path_ext_stack(path_ext, |
| 404 | ctx->fct, |
| 405 | fib_entry_chain_type_fixup(ctx->fib_entry, |
| 406 | ctx->fct), |
| 407 | ctx->next_hops); |
| 408 | } |
| 409 | else |
| 410 | { |
| 411 | fib_entry_src_get_path_forwarding(path_index, ctx); |
| 412 | } |
| 413 | break; |
| 414 | case FIB_PATH_EXT_ADJ: |
| 415 | if (FIB_PATH_EXT_ADJ_FLAG_REFINES_COVER & path_ext->fpe_adj_flags) |
| 416 | { |
| 417 | fib_entry_src_get_path_forwarding(path_index, ctx); |
| 418 | } |
| 419 | /* |
| 420 | * else |
| 421 | * the path does not refine the cover, meaning that |
| 422 | * the adjacency doesdoes not match the sub-net on the link. |
| 423 | * So this path does not contribute forwarding. |
| 424 | */ |
| 425 | break; |
| 426 | } |
| 427 | } |
| 428 | else |
| 429 | { |
| 430 | fib_entry_src_get_path_forwarding(path_index, ctx); |
| 431 | } |
| 432 | |
| 433 | return (FIB_PATH_LIST_WALK_CONTINUE); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 434 | } |
| 435 | |
| 436 | void |
| 437 | fib_entry_src_mk_lb (fib_entry_t *fib_entry, |
| 438 | const fib_entry_src_t *esrc, |
| 439 | fib_forward_chain_type_t fct, |
| 440 | dpo_id_t *dpo_lb) |
| 441 | { |
| 442 | dpo_proto_t lb_proto; |
| 443 | |
| 444 | /* |
| 445 | * If the entry has path extensions then we construct a load-balance |
| 446 | * by stacking the extensions on the forwarding chains of the paths. |
| 447 | * Otherwise we use the load-balance of the path-list |
| 448 | */ |
| 449 | fib_entry_src_collect_forwarding_ctx_t ctx = { |
| 450 | .esrc = esrc, |
| 451 | .fib_entry = fib_entry, |
| 452 | .next_hops = NULL, |
Neale Ranns | f12a83f | 2017-04-18 09:09:40 -0700 | [diff] [blame] | 453 | .n_recursive_constrained = 0, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 454 | .fct = fct, |
Neale Ranns | 57b5860 | 2017-07-15 07:37:25 -0700 | [diff] [blame] | 455 | .preference = 0xffff, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 456 | }; |
| 457 | |
Neale Ranns | c0790cf | 2017-01-05 01:01:47 -0800 | [diff] [blame] | 458 | /* |
| 459 | * As an optimisation we allocate the vector of next-hops to be sized |
| 460 | * equal to the maximum nuber of paths we will need, which is also the |
| 461 | * most likely number we will need, since in most cases the paths are 'up'. |
| 462 | */ |
| 463 | vec_validate(ctx.next_hops, fib_path_list_get_n_paths(esrc->fes_pl)); |
| 464 | vec_reset_length(ctx.next_hops); |
| 465 | |
Neale Ranns | f12a83f | 2017-04-18 09:09:40 -0700 | [diff] [blame] | 466 | lb_proto = fib_forw_chain_type_to_dpo_proto(fct); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 467 | |
| 468 | fib_path_list_walk(esrc->fes_pl, |
| 469 | fib_entry_src_collect_forwarding, |
| 470 | &ctx); |
| 471 | |
| 472 | if (esrc->fes_entry_flags & FIB_ENTRY_FLAG_EXCLUSIVE) |
| 473 | { |
| 474 | /* |
| 475 | * the client provided the DPO that the entry should link to. |
| 476 | * all entries must link to a LB, so if it is an LB already |
| 477 | * then we can use it. |
| 478 | */ |
| 479 | if ((1 == vec_len(ctx.next_hops)) && |
| 480 | (DPO_LOAD_BALANCE == ctx.next_hops[0].path_dpo.dpoi_type)) |
| 481 | { |
| 482 | dpo_copy(dpo_lb, &ctx.next_hops[0].path_dpo); |
| 483 | dpo_reset(&ctx.next_hops[0].path_dpo); |
| 484 | return; |
| 485 | } |
| 486 | } |
| 487 | |
| 488 | if (!dpo_id_is_valid(dpo_lb)) |
| 489 | { |
| 490 | /* |
| 491 | * first time create |
| 492 | */ |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 493 | if (esrc->fes_entry_flags & FIB_ENTRY_FLAG_MULTICAST) |
| 494 | { |
| 495 | dpo_set(dpo_lb, |
| 496 | DPO_REPLICATE, |
| 497 | lb_proto, |
| 498 | MPLS_IS_REPLICATE | replicate_create(0, lb_proto)); |
| 499 | } |
| 500 | else |
| 501 | { |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 502 | fib_protocol_t flow_hash_proto; |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 503 | flow_hash_config_t fhc; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 504 | |
Neale Ranns | 41da54f | 2017-05-02 10:15:19 -0700 | [diff] [blame] | 505 | /* |
| 506 | * if the protocol for the LB we are building does not match that |
| 507 | * of the fib_entry (i.e. we are build the [n]EOS LB for an IPv[46] |
| 508 | * then the fib_index is not an index that relates to the table |
| 509 | * type we need. So get the default flow-hash config instead. |
| 510 | */ |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 511 | flow_hash_proto = dpo_proto_to_fib(lb_proto); |
| 512 | if (fib_entry->fe_prefix.fp_proto != flow_hash_proto) |
Neale Ranns | 41da54f | 2017-05-02 10:15:19 -0700 | [diff] [blame] | 513 | { |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 514 | fhc = fib_table_get_default_flow_hash_config(flow_hash_proto); |
Neale Ranns | 41da54f | 2017-05-02 10:15:19 -0700 | [diff] [blame] | 515 | } |
| 516 | else |
| 517 | { |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 518 | fhc = fib_table_get_flow_hash_config(fib_entry->fe_fib_index, |
| 519 | flow_hash_proto); |
Neale Ranns | 41da54f | 2017-05-02 10:15:19 -0700 | [diff] [blame] | 520 | } |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 521 | |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 522 | dpo_set(dpo_lb, |
| 523 | DPO_LOAD_BALANCE, |
| 524 | lb_proto, |
| 525 | load_balance_create(0, lb_proto, fhc)); |
| 526 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 527 | } |
| 528 | |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 529 | if (esrc->fes_entry_flags & FIB_ENTRY_FLAG_MULTICAST) |
Neale Ranns | 3ee4404 | 2016-10-03 13:05:48 +0100 | [diff] [blame] | 530 | { |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 531 | /* |
| 532 | * MPLS multicast |
| 533 | */ |
| 534 | replicate_multipath_update(dpo_lb, ctx.next_hops); |
Neale Ranns | 3ee4404 | 2016-10-03 13:05:48 +0100 | [diff] [blame] | 535 | } |
| 536 | else |
| 537 | { |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 538 | load_balance_multipath_update(dpo_lb, |
| 539 | ctx.next_hops, |
| 540 | fib_entry_calc_lb_flags(&ctx)); |
| 541 | vec_free(ctx.next_hops); |
| 542 | |
| 543 | /* |
| 544 | * if this entry is sourced by the uRPF-exempt source then we |
| 545 | * append the always present local0 interface (index 0) to the |
| 546 | * uRPF list so it is not empty. that way packets pass the loose check. |
| 547 | */ |
| 548 | index_t ui = fib_path_list_get_urpf(esrc->fes_pl); |
| 549 | |
| 550 | if ((fib_entry_is_sourced(fib_entry_get_index(fib_entry), |
| 551 | FIB_SOURCE_URPF_EXEMPT) || |
| 552 | (esrc->fes_entry_flags & FIB_ENTRY_FLAG_LOOSE_URPF_EXEMPT))&& |
| 553 | (0 == fib_urpf_check_size(ui))) |
| 554 | { |
| 555 | /* |
| 556 | * The uRPF list we get from the path-list is shared by all |
| 557 | * other users of the list, but the uRPF exemption applies |
| 558 | * only to this prefix. So we need our own list. |
| 559 | */ |
| 560 | ui = fib_urpf_list_alloc_and_lock(); |
| 561 | fib_urpf_list_append(ui, 0); |
| 562 | fib_urpf_list_bake(ui); |
| 563 | load_balance_set_urpf(dpo_lb->dpoi_index, ui); |
| 564 | fib_urpf_list_unlock(ui); |
| 565 | } |
| 566 | else |
| 567 | { |
| 568 | load_balance_set_urpf(dpo_lb->dpoi_index, ui); |
| 569 | } |
| 570 | load_balance_set_fib_entry_flags(dpo_lb->dpoi_index, |
| 571 | fib_entry_get_flags_i(fib_entry)); |
Neale Ranns | 3ee4404 | 2016-10-03 13:05:48 +0100 | [diff] [blame] | 572 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 573 | } |
| 574 | |
| 575 | void |
| 576 | fib_entry_src_action_install (fib_entry_t *fib_entry, |
| 577 | fib_source_t source) |
| 578 | { |
| 579 | /* |
| 580 | * Install the forwarding chain for the given source into the forwarding |
| 581 | * tables |
| 582 | */ |
| 583 | fib_forward_chain_type_t fct; |
| 584 | fib_entry_src_t *esrc; |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 585 | int insert; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 586 | |
| 587 | fct = fib_entry_get_default_chain_type(fib_entry); |
| 588 | esrc = fib_entry_src_find(fib_entry, source, NULL); |
| 589 | |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 590 | /* |
| 591 | * Every entry has its own load-balance object. All changes to the entry's |
| 592 | * forwarding result in an inplace modify of the load-balance. This means |
| 593 | * the load-balance object only needs to be added to the forwarding |
| 594 | * DB once, when it is created. |
| 595 | */ |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 596 | insert = !dpo_id_is_valid(&fib_entry->fe_lb); |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 597 | |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 598 | fib_entry_src_mk_lb(fib_entry, esrc, fct, &fib_entry->fe_lb); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 599 | |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 600 | ASSERT(dpo_id_is_valid(&fib_entry->fe_lb)); |
| 601 | FIB_ENTRY_DBG(fib_entry, "install: %d", fib_entry->fe_lb); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 602 | |
| 603 | /* |
| 604 | * insert the adj into the data-plane forwarding trie |
| 605 | */ |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 606 | if (insert) |
| 607 | { |
| 608 | fib_table_fwding_dpo_update(fib_entry->fe_fib_index, |
| 609 | &fib_entry->fe_prefix, |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 610 | &fib_entry->fe_lb); |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 611 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 612 | |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 613 | /* |
| 614 | * if any of the other chain types are already created they will need |
| 615 | * updating too |
| 616 | */ |
| 617 | fib_entry_delegate_type_t fdt; |
| 618 | fib_entry_delegate_t *fed; |
| 619 | |
| 620 | FOR_EACH_DELEGATE_CHAIN(fib_entry, fdt, fed, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 621 | { |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 622 | fib_entry_src_mk_lb(fib_entry, esrc, |
| 623 | fib_entry_delegate_type_to_chain_type(fdt), |
| 624 | &fed->fd_dpo); |
| 625 | }); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 626 | } |
| 627 | |
| 628 | void |
| 629 | fib_entry_src_action_uninstall (fib_entry_t *fib_entry) |
| 630 | { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 631 | /* |
Neale Ranns | 3ee4404 | 2016-10-03 13:05:48 +0100 | [diff] [blame] | 632 | * uninstall the forwarding chain from the forwarding tables |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 633 | */ |
| 634 | FIB_ENTRY_DBG(fib_entry, "uninstall: %d", |
| 635 | fib_entry->fe_adj_index); |
| 636 | |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 637 | if (dpo_id_is_valid(&fib_entry->fe_lb)) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 638 | { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 639 | fib_table_fwding_dpo_remove( |
| 640 | fib_entry->fe_fib_index, |
| 641 | &fib_entry->fe_prefix, |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 642 | &fib_entry->fe_lb); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 643 | |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 644 | dpo_reset(&fib_entry->fe_lb); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 645 | } |
| 646 | } |
| 647 | |
| 648 | static void |
| 649 | fib_entry_recursive_loop_detect_i (fib_node_index_t path_list_index) |
| 650 | { |
| 651 | fib_node_index_t *entries = NULL; |
| 652 | |
| 653 | fib_path_list_recursive_loop_detect(path_list_index, &entries); |
| 654 | |
| 655 | vec_free(entries); |
| 656 | } |
| 657 | |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 658 | /* |
| 659 | * fib_entry_src_action_copy |
| 660 | * |
| 661 | * copy a source data from another entry to this one |
| 662 | */ |
| 663 | fib_entry_t * |
| 664 | fib_entry_src_action_copy (fib_entry_t *fib_entry, |
| 665 | const fib_entry_src_t *orig_src) |
| 666 | { |
| 667 | fib_entry_src_t *esrc; |
| 668 | |
| 669 | esrc = fib_entry_src_find_or_create(fib_entry, orig_src->fes_src); |
| 670 | |
| 671 | *esrc = *orig_src; |
| 672 | esrc->fes_ref_count = 1; |
| 673 | esrc->fes_flags |= FIB_ENTRY_SRC_FLAG_INHERITED; |
| 674 | esrc->fes_flags &= ~FIB_ENTRY_SRC_FLAG_ACTIVE; |
| 675 | esrc->fes_entry_flags &= ~FIB_ENTRY_FLAG_COVERED_INHERIT; |
| 676 | |
| 677 | /* |
| 678 | * the source owns a lock on the entry |
| 679 | */ |
| 680 | fib_path_list_lock(esrc->fes_pl); |
| 681 | fib_entry_lock(fib_entry_get_index(fib_entry)); |
| 682 | |
| 683 | return (fib_entry); |
| 684 | } |
| 685 | |
| 686 | /* |
| 687 | * fib_entry_src_action_update |
| 688 | * |
| 689 | * copy a source data from another entry to this one |
| 690 | */ |
| 691 | static fib_entry_src_t * |
| 692 | fib_entry_src_action_update_from_cover (fib_entry_t *fib_entry, |
| 693 | const fib_entry_src_t *orig_src) |
| 694 | { |
| 695 | fib_entry_src_t *esrc; |
| 696 | |
| 697 | esrc = fib_entry_src_find_or_create(fib_entry, orig_src->fes_src); |
| 698 | |
| 699 | /* |
| 700 | * the source owns a lock on the entry |
| 701 | */ |
| 702 | fib_path_list_unlock(esrc->fes_pl); |
| 703 | esrc->fes_pl = orig_src->fes_pl; |
| 704 | fib_path_list_lock(esrc->fes_pl); |
| 705 | |
| 706 | return (esrc); |
| 707 | } |
| 708 | |
| 709 | static fib_table_walk_rc_t |
| 710 | fib_entry_src_covered_inherit_add_i (fib_entry_t *fib_entry, |
| 711 | const fib_entry_src_t *cover_src) |
| 712 | { |
| 713 | fib_entry_src_t *esrc; |
| 714 | |
| 715 | esrc = fib_entry_src_find(fib_entry, cover_src->fes_src, NULL); |
| 716 | |
| 717 | if (cover_src == esrc) |
| 718 | { |
| 719 | return (FIB_TABLE_WALK_CONTINUE); |
| 720 | } |
| 721 | |
| 722 | if (NULL != esrc) |
| 723 | { |
| 724 | /* |
| 725 | * the covered entry already has this source. |
| 726 | */ |
| 727 | if (esrc->fes_entry_flags & FIB_ENTRY_FLAG_COVERED_INHERIT) |
| 728 | { |
| 729 | /* |
| 730 | * the covered source is itself a COVERED_INHERIT, i.e. |
| 731 | * it also pushes this source down the sub-tree. |
| 732 | * We consider this more specfic covered to be the owner |
| 733 | * of the sub-tree from this point down. |
| 734 | */ |
| 735 | return (FIB_TABLE_WALK_SUB_TREE_STOP); |
| 736 | } |
| 737 | if (esrc->fes_flags & FIB_ENTRY_SRC_FLAG_INHERITED) |
| 738 | { |
| 739 | /* |
| 740 | * The covered's source data has been inherited, presumably |
| 741 | * from this cover, i.e. this is a modify. |
| 742 | */ |
| 743 | esrc = fib_entry_src_action_update_from_cover(fib_entry, cover_src); |
| 744 | fib_entry_source_change(fib_entry, esrc->fes_src, esrc->fes_src); |
| 745 | } |
| 746 | else |
| 747 | { |
| 748 | /* |
| 749 | * The covered's source was not inherited and it is also |
| 750 | * not inherting. Nevertheless, it still owns the sub-tree from |
| 751 | * this point down. |
| 752 | */ |
| 753 | return (FIB_TABLE_WALK_SUB_TREE_STOP); |
| 754 | } |
| 755 | } |
| 756 | else |
| 757 | { |
| 758 | /* |
| 759 | * The covered does not have this source - add it. |
| 760 | */ |
| 761 | fib_source_t best_source; |
| 762 | |
| 763 | best_source = fib_entry_get_best_source( |
| 764 | fib_entry_get_index(fib_entry)); |
| 765 | |
| 766 | fib_entry_src_action_copy(fib_entry, cover_src); |
| 767 | fib_entry_source_change(fib_entry, best_source, cover_src->fes_src); |
| 768 | |
| 769 | } |
| 770 | return (FIB_TABLE_WALK_CONTINUE); |
| 771 | } |
| 772 | |
| 773 | static fib_table_walk_rc_t |
| 774 | fib_entry_src_covered_inherit_walk_add (fib_node_index_t fei, |
| 775 | void *ctx) |
| 776 | { |
| 777 | return (fib_entry_src_covered_inherit_add_i(fib_entry_get(fei), ctx)); |
| 778 | } |
| 779 | |
| 780 | static fib_table_walk_rc_t |
| 781 | fib_entry_src_covered_inherit_walk_remove (fib_node_index_t fei, |
| 782 | void *ctx) |
| 783 | { |
| 784 | fib_entry_src_t *cover_src, *esrc; |
| 785 | fib_entry_t *fib_entry; |
| 786 | |
| 787 | fib_entry = fib_entry_get(fei); |
| 788 | |
| 789 | cover_src = ctx; |
| 790 | esrc = fib_entry_src_find(fib_entry, cover_src->fes_src, NULL); |
| 791 | |
| 792 | if (cover_src == esrc) |
| 793 | { |
| 794 | return (FIB_TABLE_WALK_CONTINUE); |
| 795 | } |
| 796 | |
| 797 | if (NULL != esrc) |
| 798 | { |
| 799 | /* |
| 800 | * the covered entry already has this source. |
| 801 | */ |
| 802 | if (esrc->fes_entry_flags & FIB_ENTRY_FLAG_COVERED_INHERIT) |
| 803 | { |
| 804 | /* |
| 805 | * the covered source is itself a COVERED_INHERIT, i.e. |
| 806 | * it also pushes this source down the sub-tree. |
| 807 | * We consider this more specfic covered to be the owner |
| 808 | * of the sub-tree from this point down. |
| 809 | */ |
| 810 | return (FIB_TABLE_WALK_SUB_TREE_STOP); |
| 811 | } |
| 812 | if (esrc->fes_flags & FIB_ENTRY_SRC_FLAG_INHERITED) |
| 813 | { |
| 814 | /* |
| 815 | * The covered's source data has been inherited, presumably |
| 816 | * from this cover |
| 817 | */ |
| 818 | fib_entry_src_flag_t remaining; |
| 819 | |
| 820 | remaining = fib_entry_special_remove(fei, cover_src->fes_src); |
| 821 | |
| 822 | ASSERT(FIB_ENTRY_SRC_FLAG_ADDED == remaining); |
| 823 | } |
| 824 | else |
| 825 | { |
| 826 | /* |
| 827 | * The covered's source was not inherited and it is also |
| 828 | * not inherting. Nevertheless, it still owns the sub-tree from |
| 829 | * this point down. |
| 830 | */ |
| 831 | return (FIB_TABLE_WALK_SUB_TREE_STOP); |
| 832 | } |
| 833 | } |
| 834 | else |
| 835 | { |
| 836 | /* |
| 837 | * The covered does not have this source - that's an error, |
| 838 | * since it should have inherited, but there is nothing we can do |
| 839 | * about it now. |
| 840 | */ |
| 841 | } |
| 842 | return (FIB_TABLE_WALK_CONTINUE); |
| 843 | } |
| 844 | |
| 845 | void |
| 846 | fib_entry_src_inherit (const fib_entry_t *cover, |
| 847 | fib_entry_t *covered) |
| 848 | { |
| 849 | CLIB_UNUSED(fib_source_t source); |
| 850 | const fib_entry_src_t *src; |
| 851 | |
| 852 | FOR_EACH_SRC_ADDED(cover, src, source, |
| 853 | ({ |
| 854 | if ((src->fes_entry_flags & FIB_ENTRY_FLAG_COVERED_INHERIT) || |
| 855 | (src->fes_flags & FIB_ENTRY_SRC_FLAG_INHERITED)) |
| 856 | { |
| 857 | fib_entry_src_covered_inherit_add_i(covered, src); |
| 858 | } |
| 859 | })) |
| 860 | } |
| 861 | |
| 862 | static void |
| 863 | fib_entry_src_covered_inherit_add (fib_entry_t *fib_entry, |
| 864 | fib_source_t source) |
| 865 | |
| 866 | { |
| 867 | fib_entry_src_t *esrc; |
| 868 | |
| 869 | esrc = fib_entry_src_find(fib_entry, source, NULL); |
| 870 | |
| 871 | ASSERT(esrc->fes_flags & FIB_ENTRY_SRC_FLAG_ACTIVE); |
| 872 | |
| 873 | if ((esrc->fes_entry_flags & FIB_ENTRY_FLAG_COVERED_INHERIT) || |
| 874 | (esrc->fes_flags & FIB_ENTRY_SRC_FLAG_INHERITED)) |
| 875 | { |
| 876 | fib_table_sub_tree_walk(fib_entry->fe_fib_index, |
| 877 | fib_entry->fe_prefix.fp_proto, |
| 878 | &fib_entry->fe_prefix, |
| 879 | fib_entry_src_covered_inherit_walk_add, |
| 880 | esrc); |
| 881 | } |
| 882 | } |
| 883 | |
| 884 | static void |
| 885 | fib_entry_src_covered_inherit_remove (fib_entry_t *fib_entry, |
| 886 | fib_entry_src_t *esrc) |
| 887 | |
| 888 | { |
| 889 | ASSERT(!(esrc->fes_flags & FIB_ENTRY_SRC_FLAG_ACTIVE)); |
| 890 | |
| 891 | if (esrc->fes_entry_flags & FIB_ENTRY_FLAG_COVERED_INHERIT) |
| 892 | { |
| 893 | fib_table_sub_tree_walk(fib_entry->fe_fib_index, |
| 894 | fib_entry->fe_prefix.fp_proto, |
| 895 | &fib_entry->fe_prefix, |
| 896 | fib_entry_src_covered_inherit_walk_remove, |
| 897 | esrc); |
| 898 | } |
| 899 | } |
| 900 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 901 | void |
| 902 | fib_entry_src_action_activate (fib_entry_t *fib_entry, |
| 903 | fib_source_t source) |
| 904 | |
| 905 | { |
| 906 | int houston_we_are_go_for_install; |
| 907 | fib_entry_src_t *esrc; |
| 908 | |
| 909 | esrc = fib_entry_src_find(fib_entry, source, NULL); |
| 910 | |
| 911 | ASSERT(!(esrc->fes_flags & FIB_ENTRY_SRC_FLAG_ACTIVE)); |
| 912 | ASSERT(esrc->fes_flags & FIB_ENTRY_SRC_FLAG_ADDED); |
| 913 | |
| 914 | esrc->fes_flags |= FIB_ENTRY_SRC_FLAG_ACTIVE; |
| 915 | |
| 916 | if (NULL != fib_entry_src_vft[source].fesv_activate) |
| 917 | { |
| 918 | houston_we_are_go_for_install = |
| 919 | fib_entry_src_vft[source].fesv_activate(esrc, fib_entry); |
| 920 | } |
| 921 | else |
| 922 | { |
| 923 | /* |
| 924 | * the source is not providing an activate function, we'll assume |
| 925 | * therefore it has no objection to installing the entry |
| 926 | */ |
| 927 | houston_we_are_go_for_install = !0; |
| 928 | } |
| 929 | |
| 930 | /* |
| 931 | * link to the path-list provided by the source, and go check |
| 932 | * if that forms any loops in the graph. |
| 933 | */ |
| 934 | fib_entry->fe_parent = esrc->fes_pl; |
| 935 | fib_entry->fe_sibling = |
| 936 | fib_path_list_child_add(fib_entry->fe_parent, |
| 937 | FIB_NODE_TYPE_ENTRY, |
| 938 | fib_entry_get_index(fib_entry)); |
| 939 | |
| 940 | fib_entry_recursive_loop_detect_i(fib_entry->fe_parent); |
| 941 | |
| 942 | FIB_ENTRY_DBG(fib_entry, "activate: %d", |
| 943 | fib_entry->fe_parent); |
| 944 | |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 945 | /* |
| 946 | * If this source should push its state to covered prefixs, do that now. |
| 947 | */ |
| 948 | fib_entry_src_covered_inherit_add(fib_entry, source); |
| 949 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 950 | if (0 != houston_we_are_go_for_install) |
| 951 | { |
| 952 | fib_entry_src_action_install(fib_entry, source); |
| 953 | } |
| 954 | else |
| 955 | { |
| 956 | fib_entry_src_action_uninstall(fib_entry); |
| 957 | } |
| 958 | } |
| 959 | |
| 960 | void |
| 961 | fib_entry_src_action_deactivate (fib_entry_t *fib_entry, |
| 962 | fib_source_t source) |
| 963 | |
| 964 | { |
| 965 | fib_node_index_t path_list_index; |
| 966 | fib_entry_src_t *esrc; |
| 967 | |
| 968 | esrc = fib_entry_src_find(fib_entry, source, NULL); |
| 969 | |
| 970 | ASSERT(esrc->fes_flags & FIB_ENTRY_SRC_FLAG_ACTIVE); |
| 971 | |
| 972 | if (NULL != fib_entry_src_vft[source].fesv_deactivate) |
| 973 | { |
| 974 | fib_entry_src_vft[source].fesv_deactivate(esrc, fib_entry); |
| 975 | } |
| 976 | |
| 977 | esrc->fes_flags &= ~FIB_ENTRY_SRC_FLAG_ACTIVE; |
| 978 | |
| 979 | FIB_ENTRY_DBG(fib_entry, "deactivate: %d", fib_entry->fe_parent); |
| 980 | |
| 981 | /* |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 982 | * If this source should pull its state from covered prefixs, do that now. |
| 983 | * If this source also has the INHERITED flag set then it has a cover |
| 984 | * that wants to push down forwarding. We only want the covereds to see |
| 985 | * one update. |
| 986 | */ |
| 987 | fib_entry_src_covered_inherit_remove(fib_entry, esrc); |
| 988 | |
| 989 | /* |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 990 | * un-link from an old path-list. Check for any loops this will clear |
| 991 | */ |
| 992 | path_list_index = fib_entry->fe_parent; |
| 993 | fib_entry->fe_parent = FIB_NODE_INDEX_INVALID; |
| 994 | |
| 995 | fib_entry_recursive_loop_detect_i(path_list_index); |
| 996 | |
| 997 | /* |
| 998 | * this will unlock the path-list, so it may be invalid thereafter. |
| 999 | */ |
| 1000 | fib_path_list_child_remove(path_list_index, fib_entry->fe_sibling); |
| 1001 | fib_entry->fe_sibling = FIB_NODE_INDEX_INVALID; |
| 1002 | } |
| 1003 | |
Neale Ranns | a4e7766 | 2017-12-04 20:00:30 +0000 | [diff] [blame] | 1004 | static void |
| 1005 | fib_entry_src_action_fwd_update (const fib_entry_t *fib_entry, |
| 1006 | fib_source_t source) |
| 1007 | { |
| 1008 | fib_entry_src_t *esrc; |
| 1009 | |
| 1010 | vec_foreach(esrc, fib_entry->fe_srcs) |
| 1011 | { |
| 1012 | if (NULL != fib_entry_src_vft[esrc->fes_src].fesv_fwd_update) |
| 1013 | { |
| 1014 | fib_entry_src_vft[esrc->fes_src].fesv_fwd_update(esrc, |
| 1015 | fib_entry, |
| 1016 | source); |
| 1017 | } |
| 1018 | } |
| 1019 | } |
| 1020 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1021 | void |
| 1022 | fib_entry_src_action_reactivate (fib_entry_t *fib_entry, |
| 1023 | fib_source_t source) |
| 1024 | { |
| 1025 | fib_node_index_t path_list_index; |
| 1026 | fib_entry_src_t *esrc; |
| 1027 | |
| 1028 | esrc = fib_entry_src_find(fib_entry, source, NULL); |
| 1029 | |
| 1030 | ASSERT(esrc->fes_flags & FIB_ENTRY_SRC_FLAG_ACTIVE); |
| 1031 | |
| 1032 | FIB_ENTRY_DBG(fib_entry, "reactivate: %d to %d", |
| 1033 | fib_entry->fe_parent, |
| 1034 | esrc->fes_pl); |
| 1035 | |
| 1036 | if (fib_entry->fe_parent != esrc->fes_pl) |
| 1037 | { |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 1038 | int remain_installed; |
| 1039 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1040 | /* |
| 1041 | * un-link from an old path-list. Check for any loops this will clear |
| 1042 | */ |
| 1043 | path_list_index = fib_entry->fe_parent; |
| 1044 | fib_entry->fe_parent = FIB_NODE_INDEX_INVALID; |
| 1045 | |
| 1046 | /* |
| 1047 | * temporary lock so it doesn't get deleted when this entry is no |
| 1048 | * longer a child. |
| 1049 | */ |
| 1050 | fib_path_list_lock(path_list_index); |
| 1051 | |
| 1052 | /* |
| 1053 | * this entry is no longer a child. after unlinking check if any loops |
| 1054 | * were broken |
| 1055 | */ |
| 1056 | fib_path_list_child_remove(path_list_index, |
| 1057 | fib_entry->fe_sibling); |
| 1058 | |
| 1059 | fib_entry_recursive_loop_detect_i(path_list_index); |
| 1060 | |
| 1061 | /* |
| 1062 | * link to the path-list provided by the source, and go check |
| 1063 | * if that forms any loops in the graph. |
| 1064 | */ |
| 1065 | fib_entry->fe_parent = esrc->fes_pl; |
| 1066 | fib_entry->fe_sibling = |
| 1067 | fib_path_list_child_add(fib_entry->fe_parent, |
| 1068 | FIB_NODE_TYPE_ENTRY, |
| 1069 | fib_entry_get_index(fib_entry)); |
| 1070 | |
| 1071 | fib_entry_recursive_loop_detect_i(fib_entry->fe_parent); |
| 1072 | fib_path_list_unlock(path_list_index); |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 1073 | |
| 1074 | /* |
| 1075 | * call the source to reactive and get the go/no-go to remain installed |
| 1076 | */ |
| 1077 | if (NULL != fib_entry_src_vft[source].fesv_reactivate) |
| 1078 | { |
| 1079 | remain_installed = |
| 1080 | fib_entry_src_vft[source].fesv_reactivate(esrc, fib_entry); |
| 1081 | } |
| 1082 | else |
| 1083 | { |
| 1084 | remain_installed = 1; |
| 1085 | } |
| 1086 | |
| 1087 | /* |
| 1088 | * If this source should push its state to covered prefixs, do that now. |
| 1089 | */ |
| 1090 | fib_entry_src_covered_inherit_add(fib_entry, source); |
| 1091 | |
| 1092 | if (!remain_installed) |
| 1093 | { |
| 1094 | fib_entry_src_action_uninstall(fib_entry); |
| 1095 | return; |
| 1096 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1097 | } |
| 1098 | fib_entry_src_action_install(fib_entry, source); |
Neale Ranns | a4e7766 | 2017-12-04 20:00:30 +0000 | [diff] [blame] | 1099 | fib_entry_src_action_fwd_update(fib_entry, source); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1100 | } |
| 1101 | |
| 1102 | void |
Neale Ranns | a4e7766 | 2017-12-04 20:00:30 +0000 | [diff] [blame] | 1103 | fib_entry_src_action_installed (const fib_entry_t *fib_entry, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1104 | fib_source_t source) |
| 1105 | { |
| 1106 | fib_entry_src_t *esrc; |
| 1107 | |
| 1108 | esrc = fib_entry_src_find(fib_entry, source, NULL); |
| 1109 | |
| 1110 | if (NULL != fib_entry_src_vft[source].fesv_installed) |
| 1111 | { |
| 1112 | fib_entry_src_vft[source].fesv_installed(esrc, |
| 1113 | fib_entry); |
| 1114 | } |
Neale Ranns | a4e7766 | 2017-12-04 20:00:30 +0000 | [diff] [blame] | 1115 | |
| 1116 | fib_entry_src_action_fwd_update(fib_entry, source); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1117 | } |
| 1118 | |
| 1119 | /* |
| 1120 | * fib_entry_src_action_add |
| 1121 | * |
| 1122 | * Adding a source can result in a new fib_entry being created, which |
| 1123 | * can inturn mean the pool is realloc'd and thus the entry passed as |
| 1124 | * an argument it also realloc'd |
| 1125 | * @return the original entry |
| 1126 | */ |
| 1127 | fib_entry_t * |
| 1128 | fib_entry_src_action_add (fib_entry_t *fib_entry, |
| 1129 | fib_source_t source, |
| 1130 | fib_entry_flag_t flags, |
| 1131 | const dpo_id_t *dpo) |
| 1132 | { |
| 1133 | fib_node_index_t fib_entry_index; |
| 1134 | fib_entry_src_t *esrc; |
| 1135 | |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 1136 | esrc = fib_entry_src_find_or_create(fib_entry, source); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1137 | |
| 1138 | esrc->fes_ref_count++; |
| 1139 | |
| 1140 | if (1 != esrc->fes_ref_count) |
| 1141 | { |
| 1142 | /* |
| 1143 | * we only want to add the source on the 0->1 transition |
| 1144 | */ |
| 1145 | return (fib_entry); |
| 1146 | } |
| 1147 | |
| 1148 | esrc->fes_entry_flags = flags; |
| 1149 | |
| 1150 | /* |
| 1151 | * save variable so we can recover from a fib_entry realloc. |
| 1152 | */ |
| 1153 | fib_entry_index = fib_entry_get_index(fib_entry); |
| 1154 | |
| 1155 | if (NULL != fib_entry_src_vft[source].fesv_add) |
| 1156 | { |
| 1157 | fib_entry_src_vft[source].fesv_add(esrc, |
| 1158 | fib_entry, |
| 1159 | flags, |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 1160 | fib_entry_get_dpo_proto(fib_entry), |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1161 | dpo); |
| 1162 | } |
| 1163 | |
| 1164 | fib_entry = fib_entry_get(fib_entry_index); |
| 1165 | |
| 1166 | esrc->fes_flags |= FIB_ENTRY_SRC_FLAG_ADDED; |
| 1167 | |
| 1168 | fib_path_list_lock(esrc->fes_pl); |
| 1169 | |
| 1170 | /* |
| 1171 | * the source owns a lock on the entry |
| 1172 | */ |
| 1173 | fib_entry_lock(fib_entry_get_index(fib_entry)); |
| 1174 | |
| 1175 | return (fib_entry); |
| 1176 | } |
| 1177 | |
Neale Ranns | 948e00f | 2016-10-20 13:39:34 +0100 | [diff] [blame] | 1178 | /* |
| 1179 | * fib_entry_src_action_update |
| 1180 | * |
| 1181 | * Adding a source can result in a new fib_entry being created, which |
| 1182 | * can inturn mean the pool is realloc'd and thus the entry passed as |
| 1183 | * an argument it also realloc'd |
| 1184 | * @return the original entry |
| 1185 | */ |
| 1186 | fib_entry_t * |
| 1187 | fib_entry_src_action_update (fib_entry_t *fib_entry, |
| 1188 | fib_source_t source, |
| 1189 | fib_entry_flag_t flags, |
| 1190 | const dpo_id_t *dpo) |
| 1191 | { |
| 1192 | fib_node_index_t fib_entry_index, old_path_list_index; |
| 1193 | fib_entry_src_t *esrc; |
| 1194 | |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 1195 | esrc = fib_entry_src_find_or_create(fib_entry, source); |
Neale Ranns | 948e00f | 2016-10-20 13:39:34 +0100 | [diff] [blame] | 1196 | |
| 1197 | if (NULL == esrc) |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 1198 | { |
Neale Ranns | 948e00f | 2016-10-20 13:39:34 +0100 | [diff] [blame] | 1199 | return (fib_entry_src_action_add(fib_entry, source, flags, dpo)); |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 1200 | } |
Neale Ranns | 948e00f | 2016-10-20 13:39:34 +0100 | [diff] [blame] | 1201 | |
| 1202 | old_path_list_index = esrc->fes_pl; |
| 1203 | esrc->fes_entry_flags = flags; |
| 1204 | |
| 1205 | /* |
| 1206 | * save variable so we can recover from a fib_entry realloc. |
| 1207 | */ |
| 1208 | fib_entry_index = fib_entry_get_index(fib_entry); |
| 1209 | |
| 1210 | if (NULL != fib_entry_src_vft[source].fesv_add) |
| 1211 | { |
| 1212 | fib_entry_src_vft[source].fesv_add(esrc, |
| 1213 | fib_entry, |
| 1214 | flags, |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 1215 | fib_entry_get_dpo_proto(fib_entry), |
Neale Ranns | 948e00f | 2016-10-20 13:39:34 +0100 | [diff] [blame] | 1216 | dpo); |
| 1217 | } |
| 1218 | |
| 1219 | fib_entry = fib_entry_get(fib_entry_index); |
| 1220 | |
| 1221 | esrc->fes_flags |= FIB_ENTRY_SRC_FLAG_ADDED; |
| 1222 | |
| 1223 | fib_path_list_lock(esrc->fes_pl); |
| 1224 | fib_path_list_unlock(old_path_list_index); |
| 1225 | |
| 1226 | return (fib_entry); |
| 1227 | } |
| 1228 | |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 1229 | fib_entry_src_flag_t |
| 1230 | fib_entry_src_action_remove_or_update_inherit (fib_entry_t *fib_entry, |
| 1231 | fib_source_t source) |
| 1232 | { |
| 1233 | fib_entry_src_t *esrc; |
| 1234 | |
| 1235 | esrc = fib_entry_src_find(fib_entry, source, NULL); |
| 1236 | |
| 1237 | if (NULL == esrc) |
| 1238 | return (FIB_ENTRY_SRC_FLAG_ACTIVE); |
| 1239 | |
| 1240 | if ((esrc->fes_entry_flags & FIB_ENTRY_FLAG_COVERED_INHERIT) && |
| 1241 | (esrc->fes_flags & FIB_ENTRY_SRC_FLAG_INHERITED)) |
| 1242 | { |
| 1243 | fib_entry_src_t *cover_src; |
| 1244 | fib_node_index_t coveri; |
| 1245 | fib_entry_t *cover; |
| 1246 | |
| 1247 | /* |
| 1248 | * this source was pushing inherited state, but so is its |
| 1249 | * cover. Now that this source is going away, we need to |
| 1250 | * pull the covers forwarding and use it to update the covereds. |
| 1251 | * Go grab the path-list from the cover, rather than start a walk from |
| 1252 | * the cover, so we don't recursively update this entry. |
| 1253 | */ |
| 1254 | coveri = fib_table_get_less_specific(fib_entry->fe_fib_index, |
| 1255 | &fib_entry->fe_prefix); |
| 1256 | |
| 1257 | /* |
| 1258 | * only the default route has itself as its own cover, but the |
| 1259 | * default route cannot have inherited from something else. |
| 1260 | */ |
| 1261 | ASSERT(coveri != fib_entry_get_index(fib_entry)); |
| 1262 | |
| 1263 | cover = fib_entry_get(coveri); |
| 1264 | cover_src = fib_entry_src_find(cover, source, NULL); |
| 1265 | |
| 1266 | ASSERT(NULL != cover_src); |
| 1267 | |
| 1268 | esrc = fib_entry_src_action_update_from_cover(fib_entry, cover_src); |
| 1269 | esrc->fes_entry_flags &= ~FIB_ENTRY_FLAG_COVERED_INHERIT; |
| 1270 | |
| 1271 | /* |
| 1272 | * Now push the new state from the cover down to the covereds |
| 1273 | */ |
| 1274 | fib_entry_src_covered_inherit_add(fib_entry, source); |
| 1275 | |
| 1276 | return (esrc->fes_flags); |
| 1277 | } |
| 1278 | else |
| 1279 | { |
| 1280 | return (fib_entry_src_action_remove(fib_entry, source)); |
| 1281 | } |
| 1282 | } |
Neale Ranns | 948e00f | 2016-10-20 13:39:34 +0100 | [diff] [blame] | 1283 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1284 | fib_entry_src_flag_t |
| 1285 | fib_entry_src_action_remove (fib_entry_t *fib_entry, |
| 1286 | fib_source_t source) |
| 1287 | |
| 1288 | { |
| 1289 | fib_node_index_t old_path_list; |
| 1290 | fib_entry_src_flag_t sflags; |
| 1291 | fib_entry_src_t *esrc; |
| 1292 | |
| 1293 | esrc = fib_entry_src_find(fib_entry, source, NULL); |
| 1294 | |
| 1295 | if (NULL == esrc) |
| 1296 | return (FIB_ENTRY_SRC_FLAG_ACTIVE); |
| 1297 | |
| 1298 | esrc->fes_ref_count--; |
| 1299 | sflags = esrc->fes_flags; |
| 1300 | |
| 1301 | if (0 != esrc->fes_ref_count) |
| 1302 | { |
| 1303 | /* |
| 1304 | * only remove the source on the 1->0 transisition |
| 1305 | */ |
| 1306 | return (sflags); |
| 1307 | } |
| 1308 | |
| 1309 | if (esrc->fes_flags & FIB_ENTRY_SRC_FLAG_ACTIVE) |
| 1310 | { |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 1311 | fib_entry_src_action_deactivate(fib_entry, source); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1312 | } |
| 1313 | |
| 1314 | old_path_list = esrc->fes_pl; |
| 1315 | |
| 1316 | if (NULL != fib_entry_src_vft[source].fesv_remove) |
| 1317 | { |
| 1318 | fib_entry_src_vft[source].fesv_remove(esrc); |
| 1319 | } |
| 1320 | |
| 1321 | fib_path_list_unlock(old_path_list); |
| 1322 | fib_entry_unlock(fib_entry_get_index(fib_entry)); |
| 1323 | |
| 1324 | sflags &= ~FIB_ENTRY_SRC_FLAG_ADDED; |
| 1325 | fib_entry_src_action_deinit(fib_entry, source); |
| 1326 | |
| 1327 | return (sflags); |
| 1328 | } |
| 1329 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1330 | /* |
| 1331 | * fib_route_attached_cross_table |
| 1332 | * |
| 1333 | * Return true the the route is attached via an interface that |
| 1334 | * is not in the same table as the route |
| 1335 | */ |
| 1336 | static inline int |
| 1337 | fib_route_attached_cross_table (const fib_entry_t *fib_entry, |
| 1338 | const fib_route_path_t *rpath) |
| 1339 | { |
| 1340 | /* |
| 1341 | * - All zeros next-hop |
| 1342 | * - a valid interface |
| 1343 | * - entry's fib index not equeal to interface's index |
| 1344 | */ |
| 1345 | if (ip46_address_is_zero(&rpath->frp_addr) && |
| 1346 | (~0 != rpath->frp_sw_if_index) && |
Neale Ranns | eca834e | 2018-03-13 07:51:50 -0700 | [diff] [blame^] | 1347 | !(rpath->frp_flags & FIB_ROUTE_PATH_DVR) && |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1348 | (fib_entry->fe_fib_index != |
| 1349 | fib_table_get_index_for_sw_if_index(fib_entry_get_proto(fib_entry), |
| 1350 | rpath->frp_sw_if_index))) |
| 1351 | { |
| 1352 | return (!0); |
| 1353 | } |
| 1354 | return (0); |
| 1355 | } |
| 1356 | |
| 1357 | /* |
Neale Ranns | 53da221 | 2018-02-24 02:11:19 -0800 | [diff] [blame] | 1358 | * Return true if the path is attached |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1359 | */ |
| 1360 | static inline int |
| 1361 | fib_path_is_attached (const fib_route_path_t *rpath) |
| 1362 | { |
| 1363 | /* |
Neale Ranns | eca834e | 2018-03-13 07:51:50 -0700 | [diff] [blame^] | 1364 | * DVR paths are not attached, since we are not playing the |
| 1365 | * L3 game with these |
| 1366 | */ |
| 1367 | if (rpath->frp_flags & FIB_ROUTE_PATH_DVR) |
| 1368 | { |
| 1369 | return (0); |
| 1370 | } |
| 1371 | |
| 1372 | /* |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1373 | * - All zeros next-hop |
| 1374 | * - a valid interface |
| 1375 | */ |
| 1376 | if (ip46_address_is_zero(&rpath->frp_addr) && |
| 1377 | (~0 != rpath->frp_sw_if_index)) |
| 1378 | { |
| 1379 | return (!0); |
| 1380 | } |
Neale Ranns | 4b919a5 | 2017-03-11 05:55:21 -0800 | [diff] [blame] | 1381 | else if (rpath->frp_flags & FIB_ROUTE_PATH_ATTACHED) |
| 1382 | { |
| 1383 | return (!0); |
| 1384 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1385 | return (0); |
| 1386 | } |
| 1387 | |
| 1388 | fib_path_list_flags_t |
| 1389 | fib_entry_src_flags_2_path_list_flags (fib_entry_flag_t eflags) |
| 1390 | { |
| 1391 | fib_path_list_flags_t plf = FIB_PATH_LIST_FLAG_NONE; |
| 1392 | |
| 1393 | if (eflags & FIB_ENTRY_FLAG_DROP) |
| 1394 | { |
| 1395 | plf |= FIB_PATH_LIST_FLAG_DROP; |
| 1396 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1397 | if (eflags & FIB_ENTRY_FLAG_EXCLUSIVE) |
| 1398 | { |
| 1399 | plf |= FIB_PATH_LIST_FLAG_EXCLUSIVE; |
| 1400 | } |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1401 | if (eflags & FIB_ENTRY_FLAG_LOCAL) |
| 1402 | { |
| 1403 | plf |= FIB_PATH_LIST_FLAG_LOCAL; |
| 1404 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1405 | |
| 1406 | return (plf); |
| 1407 | } |
| 1408 | |
| 1409 | static void |
| 1410 | fib_entry_flags_update (const fib_entry_t *fib_entry, |
| 1411 | const fib_route_path_t *rpath, |
| 1412 | fib_path_list_flags_t *pl_flags, |
| 1413 | fib_entry_src_t *esrc) |
| 1414 | { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1415 | if ((esrc->fes_src == FIB_SOURCE_API) || |
| 1416 | (esrc->fes_src == FIB_SOURCE_CLI)) |
| 1417 | { |
| 1418 | if (fib_path_is_attached(rpath)) |
| 1419 | { |
| 1420 | esrc->fes_entry_flags |= FIB_ENTRY_FLAG_ATTACHED; |
| 1421 | } |
| 1422 | else |
| 1423 | { |
| 1424 | esrc->fes_entry_flags &= ~FIB_ENTRY_FLAG_ATTACHED; |
| 1425 | } |
Florin Coras | 79ae2d3 | 2017-12-16 08:31:06 -0800 | [diff] [blame] | 1426 | if (rpath->frp_flags & FIB_ROUTE_PATH_DEAG) |
| 1427 | { |
| 1428 | esrc->fes_entry_flags |= FIB_ENTRY_FLAG_LOOSE_URPF_EXEMPT; |
| 1429 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1430 | } |
Neale Ranns | 53da221 | 2018-02-24 02:11:19 -0800 | [diff] [blame] | 1431 | if (fib_route_attached_cross_table(fib_entry, rpath) && |
| 1432 | !(esrc->fes_entry_flags & FIB_ENTRY_FLAG_NO_ATTACHED_EXPORT)) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1433 | { |
| 1434 | esrc->fes_entry_flags |= FIB_ENTRY_FLAG_IMPORT; |
| 1435 | } |
| 1436 | else |
| 1437 | { |
| 1438 | esrc->fes_entry_flags &= ~FIB_ENTRY_FLAG_IMPORT; |
| 1439 | } |
| 1440 | } |
| 1441 | |
| 1442 | /* |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1443 | * fib_entry_src_action_add |
| 1444 | * |
| 1445 | * Adding a source can result in a new fib_entry being created, which |
| 1446 | * can inturn mean the pool is realloc'd and thus the entry passed as |
| 1447 | * an argument it also realloc'd |
| 1448 | * @return the entry |
| 1449 | */ |
| 1450 | fib_entry_t* |
| 1451 | fib_entry_src_action_path_add (fib_entry_t *fib_entry, |
| 1452 | fib_source_t source, |
| 1453 | fib_entry_flag_t flags, |
| 1454 | const fib_route_path_t *rpath) |
| 1455 | { |
| 1456 | fib_node_index_t old_path_list, fib_entry_index; |
| 1457 | fib_path_list_flags_t pl_flags; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1458 | fib_entry_src_t *esrc; |
| 1459 | |
| 1460 | /* |
| 1461 | * save variable so we can recover from a fib_entry realloc. |
| 1462 | */ |
| 1463 | fib_entry_index = fib_entry_get_index(fib_entry); |
| 1464 | |
| 1465 | esrc = fib_entry_src_find(fib_entry, source, NULL); |
| 1466 | if (NULL == esrc) |
| 1467 | { |
| 1468 | fib_entry = |
| 1469 | fib_entry_src_action_add(fib_entry, |
| 1470 | source, |
| 1471 | flags, |
| 1472 | drop_dpo_get( |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 1473 | fib_entry_get_dpo_proto(fib_entry))); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1474 | esrc = fib_entry_src_find(fib_entry, source, NULL); |
| 1475 | } |
| 1476 | |
| 1477 | /* |
| 1478 | * we are no doubt modifying a path-list. If the path-list |
| 1479 | * is shared, and hence not modifiable, then the index returned |
| 1480 | * will be for a different path-list. This FIB entry to needs |
| 1481 | * to maintain its lock appropriately. |
| 1482 | */ |
| 1483 | old_path_list = esrc->fes_pl; |
| 1484 | |
| 1485 | ASSERT(NULL != fib_entry_src_vft[source].fesv_path_add); |
| 1486 | |
| 1487 | pl_flags = fib_entry_src_flags_2_path_list_flags(fib_entry_get_flags_i(fib_entry)); |
| 1488 | fib_entry_flags_update(fib_entry, rpath, &pl_flags, esrc); |
| 1489 | |
| 1490 | fib_entry_src_vft[source].fesv_path_add(esrc, fib_entry, pl_flags, rpath); |
| 1491 | fib_entry = fib_entry_get(fib_entry_index); |
| 1492 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1493 | fib_path_list_lock(esrc->fes_pl); |
| 1494 | fib_path_list_unlock(old_path_list); |
| 1495 | |
| 1496 | return (fib_entry); |
| 1497 | } |
| 1498 | |
| 1499 | /* |
| 1500 | * fib_entry_src_action_swap |
| 1501 | * |
| 1502 | * The source is providing new paths to replace the old ones. |
| 1503 | * Adding a source can result in a new fib_entry being created, which |
| 1504 | * can inturn mean the pool is realloc'd and thus the entry passed as |
| 1505 | * an argument it also realloc'd |
| 1506 | * @return the entry |
| 1507 | */ |
| 1508 | fib_entry_t* |
| 1509 | fib_entry_src_action_path_swap (fib_entry_t *fib_entry, |
| 1510 | fib_source_t source, |
| 1511 | fib_entry_flag_t flags, |
| 1512 | const fib_route_path_t *rpaths) |
| 1513 | { |
| 1514 | fib_node_index_t old_path_list, fib_entry_index; |
| 1515 | fib_path_list_flags_t pl_flags; |
| 1516 | const fib_route_path_t *rpath; |
| 1517 | fib_entry_src_t *esrc; |
| 1518 | |
| 1519 | esrc = fib_entry_src_find(fib_entry, source, NULL); |
| 1520 | |
| 1521 | /* |
| 1522 | * save variable so we can recover from a fib_entry realloc. |
| 1523 | */ |
| 1524 | fib_entry_index = fib_entry_get_index(fib_entry); |
| 1525 | |
| 1526 | if (NULL == esrc) |
| 1527 | { |
| 1528 | fib_entry = fib_entry_src_action_add(fib_entry, |
| 1529 | source, |
| 1530 | flags, |
| 1531 | drop_dpo_get( |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 1532 | fib_entry_get_dpo_proto(fib_entry))); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1533 | esrc = fib_entry_src_find(fib_entry, source, NULL); |
| 1534 | } |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 1535 | else |
| 1536 | { |
| 1537 | esrc->fes_entry_flags = flags; |
| 1538 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1539 | |
| 1540 | /* |
| 1541 | * swapping paths may create a new path-list (or may use an existing shared) |
| 1542 | * but we are certainly getting a different one. This FIB entry to needs |
| 1543 | * to maintain its lock appropriately. |
| 1544 | */ |
| 1545 | old_path_list = esrc->fes_pl; |
| 1546 | |
| 1547 | ASSERT(NULL != fib_entry_src_vft[source].fesv_path_swap); |
| 1548 | |
Neale Ranns | df089a8 | 2016-10-02 16:39:06 +0100 | [diff] [blame] | 1549 | pl_flags = fib_entry_src_flags_2_path_list_flags(flags); |
| 1550 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1551 | vec_foreach(rpath, rpaths) |
| 1552 | { |
| 1553 | fib_entry_flags_update(fib_entry, rpath, &pl_flags, esrc); |
| 1554 | } |
| 1555 | |
| 1556 | fib_entry_src_vft[source].fesv_path_swap(esrc, |
| 1557 | fib_entry, |
| 1558 | pl_flags, |
| 1559 | rpaths); |
| 1560 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1561 | fib_entry = fib_entry_get(fib_entry_index); |
| 1562 | |
| 1563 | fib_path_list_lock(esrc->fes_pl); |
| 1564 | fib_path_list_unlock(old_path_list); |
| 1565 | |
| 1566 | return (fib_entry); |
| 1567 | } |
| 1568 | |
| 1569 | fib_entry_src_flag_t |
| 1570 | fib_entry_src_action_path_remove (fib_entry_t *fib_entry, |
| 1571 | fib_source_t source, |
| 1572 | const fib_route_path_t *rpath) |
| 1573 | { |
| 1574 | fib_path_list_flags_t pl_flags; |
| 1575 | fib_node_index_t old_path_list; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1576 | fib_entry_src_t *esrc; |
| 1577 | |
| 1578 | esrc = fib_entry_src_find(fib_entry, source, NULL); |
| 1579 | |
| 1580 | ASSERT(NULL != esrc); |
| 1581 | ASSERT(esrc->fes_flags & FIB_ENTRY_SRC_FLAG_ADDED); |
| 1582 | |
| 1583 | /* |
| 1584 | * we no doubt modifying a path-list. If the path-list |
| 1585 | * is shared, and hence not modifiable, then the index returned |
| 1586 | * will be for a different path-list. This FIB entry to needs |
| 1587 | * to maintain its lock appropriately. |
| 1588 | */ |
| 1589 | old_path_list = esrc->fes_pl; |
| 1590 | |
| 1591 | ASSERT(NULL != fib_entry_src_vft[source].fesv_path_remove); |
| 1592 | |
| 1593 | pl_flags = fib_entry_src_flags_2_path_list_flags(fib_entry_get_flags_i(fib_entry)); |
| 1594 | fib_entry_flags_update(fib_entry, rpath, &pl_flags, esrc); |
| 1595 | |
| 1596 | fib_entry_src_vft[source].fesv_path_remove(esrc, pl_flags, rpath); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1597 | |
| 1598 | /* |
| 1599 | * lock the new path-list, unlock the old if it had one |
| 1600 | */ |
| 1601 | fib_path_list_unlock(old_path_list); |
| 1602 | |
| 1603 | if (FIB_NODE_INDEX_INVALID != esrc->fes_pl) { |
| 1604 | fib_path_list_lock(esrc->fes_pl); |
| 1605 | return (FIB_ENTRY_SRC_FLAG_ADDED); |
| 1606 | } |
| 1607 | else |
| 1608 | { |
| 1609 | /* |
| 1610 | * no more paths left from this source |
| 1611 | */ |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 1612 | fib_entry_src_action_remove_or_update_inherit(fib_entry, source); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1613 | return (FIB_ENTRY_SRC_FLAG_NONE); |
| 1614 | } |
| 1615 | } |
| 1616 | |
| 1617 | u8* |
| 1618 | fib_entry_src_format (fib_entry_t *fib_entry, |
| 1619 | fib_source_t source, |
| 1620 | u8* s) |
| 1621 | { |
| 1622 | fib_entry_src_t *esrc; |
| 1623 | |
| 1624 | esrc = fib_entry_src_find(fib_entry, source, NULL); |
| 1625 | |
| 1626 | if (NULL != fib_entry_src_vft[source].fesv_format) |
| 1627 | { |
| 1628 | return (fib_entry_src_vft[source].fesv_format(esrc, s)); |
| 1629 | } |
| 1630 | return (s); |
| 1631 | } |
| 1632 | |
| 1633 | adj_index_t |
| 1634 | fib_entry_get_adj_for_source (fib_node_index_t fib_entry_index, |
| 1635 | fib_source_t source) |
| 1636 | { |
| 1637 | fib_entry_t *fib_entry; |
| 1638 | fib_entry_src_t *esrc; |
| 1639 | |
| 1640 | if (FIB_NODE_INDEX_INVALID == fib_entry_index) |
| 1641 | return (ADJ_INDEX_INVALID); |
| 1642 | |
| 1643 | fib_entry = fib_entry_get(fib_entry_index); |
| 1644 | esrc = fib_entry_src_find(fib_entry, source, NULL); |
| 1645 | |
| 1646 | if (NULL != esrc) |
| 1647 | { |
| 1648 | if (FIB_NODE_INDEX_INVALID != esrc->fes_pl) |
| 1649 | { |
| 1650 | return (fib_path_list_get_adj( |
| 1651 | esrc->fes_pl, |
| 1652 | fib_entry_get_default_chain_type(fib_entry))); |
| 1653 | } |
| 1654 | } |
| 1655 | return (ADJ_INDEX_INVALID); |
| 1656 | } |
| 1657 | |
| 1658 | const int |
| 1659 | fib_entry_get_dpo_for_source (fib_node_index_t fib_entry_index, |
| 1660 | fib_source_t source, |
| 1661 | dpo_id_t *dpo) |
| 1662 | { |
| 1663 | fib_entry_t *fib_entry; |
| 1664 | fib_entry_src_t *esrc; |
| 1665 | |
| 1666 | if (FIB_NODE_INDEX_INVALID == fib_entry_index) |
| 1667 | return (0); |
| 1668 | |
| 1669 | fib_entry = fib_entry_get(fib_entry_index); |
| 1670 | esrc = fib_entry_src_find(fib_entry, source, NULL); |
| 1671 | |
| 1672 | if (NULL != esrc) |
| 1673 | { |
| 1674 | if (FIB_NODE_INDEX_INVALID != esrc->fes_pl) |
| 1675 | { |
| 1676 | fib_path_list_contribute_forwarding( |
| 1677 | esrc->fes_pl, |
| 1678 | fib_entry_get_default_chain_type(fib_entry), |
Neale Ranns | 9128637 | 2017-12-05 13:24:04 -0800 | [diff] [blame] | 1679 | FIB_PATH_LIST_FWD_FLAG_NONE, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1680 | dpo); |
| 1681 | |
| 1682 | return (dpo_id_is_valid(dpo)); |
| 1683 | } |
| 1684 | } |
| 1685 | return (0); |
| 1686 | } |
| 1687 | |
Neale Ranns | df089a8 | 2016-10-02 16:39:06 +0100 | [diff] [blame] | 1688 | u32 |
| 1689 | fib_entry_get_resolving_interface_for_source (fib_node_index_t entry_index, |
| 1690 | fib_source_t source) |
| 1691 | { |
| 1692 | fib_entry_t *fib_entry; |
| 1693 | fib_entry_src_t *esrc; |
| 1694 | |
| 1695 | fib_entry = fib_entry_get(entry_index); |
| 1696 | |
| 1697 | esrc = fib_entry_src_find(fib_entry, source, NULL); |
| 1698 | |
| 1699 | if (NULL != esrc) |
| 1700 | { |
| 1701 | if (FIB_NODE_INDEX_INVALID != esrc->fes_pl) |
| 1702 | { |
| 1703 | return (fib_path_list_get_resolving_interface(esrc->fes_pl)); |
| 1704 | } |
| 1705 | } |
| 1706 | return (~0); |
| 1707 | } |
| 1708 | |
| 1709 | fib_entry_flag_t |
| 1710 | fib_entry_get_flags_for_source (fib_node_index_t entry_index, |
| 1711 | fib_source_t source) |
| 1712 | { |
| 1713 | fib_entry_t *fib_entry; |
| 1714 | fib_entry_src_t *esrc; |
| 1715 | |
| 1716 | fib_entry = fib_entry_get(entry_index); |
| 1717 | |
| 1718 | esrc = fib_entry_src_find(fib_entry, source, NULL); |
| 1719 | |
| 1720 | if (NULL != esrc) |
| 1721 | { |
| 1722 | return (esrc->fes_entry_flags); |
| 1723 | } |
| 1724 | |
| 1725 | return (FIB_ENTRY_FLAG_NONE); |
| 1726 | } |
| 1727 | |
Neale Ranns | a4e7766 | 2017-12-04 20:00:30 +0000 | [diff] [blame] | 1728 | fib_entry_flag_t |
| 1729 | fib_entry_get_flags_i (const fib_entry_t *fib_entry) |
| 1730 | { |
| 1731 | fib_entry_flag_t flags; |
| 1732 | |
| 1733 | /* |
| 1734 | * the vector of sources is deliberately arranged in priority order |
| 1735 | */ |
| 1736 | if (0 == vec_len(fib_entry->fe_srcs)) |
| 1737 | { |
| 1738 | flags = FIB_ENTRY_FLAG_NONE; |
| 1739 | } |
| 1740 | else |
| 1741 | { |
| 1742 | fib_entry_src_t *esrc; |
| 1743 | |
| 1744 | esrc = vec_elt_at_index(fib_entry->fe_srcs, 0); |
| 1745 | flags = esrc->fes_entry_flags; |
| 1746 | } |
| 1747 | |
| 1748 | return (flags); |
| 1749 | } |
| 1750 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1751 | void |
| 1752 | fib_entry_set_source_data (fib_node_index_t fib_entry_index, |
| 1753 | fib_source_t source, |
| 1754 | const void *data) |
| 1755 | { |
| 1756 | fib_entry_t *fib_entry; |
| 1757 | fib_entry_src_t *esrc; |
| 1758 | |
| 1759 | fib_entry = fib_entry_get(fib_entry_index); |
| 1760 | esrc = fib_entry_src_find(fib_entry, source, NULL); |
| 1761 | |
| 1762 | if (NULL != esrc && |
| 1763 | NULL != fib_entry_src_vft[source].fesv_set_data) |
| 1764 | { |
| 1765 | fib_entry_src_vft[source].fesv_set_data(esrc, fib_entry, data); |
| 1766 | } |
| 1767 | } |
| 1768 | |
| 1769 | const void* |
| 1770 | fib_entry_get_source_data (fib_node_index_t fib_entry_index, |
| 1771 | fib_source_t source) |
| 1772 | { |
| 1773 | fib_entry_t *fib_entry; |
| 1774 | fib_entry_src_t *esrc; |
| 1775 | |
| 1776 | fib_entry = fib_entry_get(fib_entry_index); |
| 1777 | esrc = fib_entry_src_find(fib_entry, source, NULL); |
| 1778 | |
| 1779 | if (NULL != esrc && |
| 1780 | NULL != fib_entry_src_vft[source].fesv_get_data) |
| 1781 | { |
| 1782 | return (fib_entry_src_vft[source].fesv_get_data(esrc, fib_entry)); |
| 1783 | } |
| 1784 | return (NULL); |
| 1785 | } |
| 1786 | |
| 1787 | void |
| 1788 | fib_entry_src_module_init (void) |
| 1789 | { |
| 1790 | fib_entry_src_rr_register(); |
| 1791 | fib_entry_src_interface_register(); |
| 1792 | fib_entry_src_default_route_register(); |
| 1793 | fib_entry_src_special_register(); |
| 1794 | fib_entry_src_api_register(); |
| 1795 | fib_entry_src_adj_register(); |
| 1796 | fib_entry_src_mpls_register(); |
| 1797 | fib_entry_src_lisp_register(); |
| 1798 | } |