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 <vlib/vlib.h> |
| 17 | #include <vnet/vnet.h> |
| 18 | #include <vnet/ip/format.h> |
| 19 | #include <vnet/ip/ip.h> |
| 20 | #include <vnet/dpo/drop_dpo.h> |
| 21 | #include <vnet/dpo/receive_dpo.h> |
| 22 | #include <vnet/dpo/load_balance_map.h> |
| 23 | #include <vnet/dpo/lookup_dpo.h> |
Neale Ranns | 43161a8 | 2017-08-12 02:12:00 -0700 | [diff] [blame] | 24 | #include <vnet/dpo/interface_rx_dpo.h> |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 25 | #include <vnet/dpo/mpls_disposition.h> |
Neale Ranns | 6f63115 | 2017-10-03 08:20:21 -0700 | [diff] [blame] | 26 | #include <vnet/dpo/l2_bridge_dpo.h> |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 27 | #include <vnet/dpo/drop_dpo.h> |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 28 | |
| 29 | #include <vnet/adj/adj.h> |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 30 | #include <vnet/adj/adj_mcast.h> |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 31 | |
Neale Ranns | 3ee4404 | 2016-10-03 13:05:48 +0100 | [diff] [blame] | 32 | #include <vnet/fib/fib_path.h> |
| 33 | #include <vnet/fib/fib_node.h> |
| 34 | #include <vnet/fib/fib_table.h> |
| 35 | #include <vnet/fib/fib_entry.h> |
| 36 | #include <vnet/fib/fib_path_list.h> |
| 37 | #include <vnet/fib/fib_internal.h> |
| 38 | #include <vnet/fib/fib_urpf_list.h> |
Neale Ranns | a3af337 | 2017-03-28 03:49:52 -0700 | [diff] [blame] | 39 | #include <vnet/fib/mpls_fib.h> |
Neale Ranns | 810086d | 2017-11-05 16:26:46 -0800 | [diff] [blame] | 40 | #include <vnet/udp/udp_encap.h> |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 41 | #include <vnet/bier/bier_fmask.h> |
| 42 | #include <vnet/bier/bier_table.h> |
| 43 | #include <vnet/bier/bier_imp.h> |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 44 | |
| 45 | /** |
| 46 | * Enurmeration of path types |
| 47 | */ |
| 48 | typedef enum fib_path_type_t_ { |
| 49 | /** |
| 50 | * Marker. Add new types after this one. |
| 51 | */ |
| 52 | FIB_PATH_TYPE_FIRST = 0, |
| 53 | /** |
| 54 | * Attached-nexthop. An interface and a nexthop are known. |
| 55 | */ |
| 56 | FIB_PATH_TYPE_ATTACHED_NEXT_HOP = FIB_PATH_TYPE_FIRST, |
| 57 | /** |
| 58 | * attached. Only the interface is known. |
| 59 | */ |
| 60 | FIB_PATH_TYPE_ATTACHED, |
| 61 | /** |
| 62 | * recursive. Only the next-hop is known. |
| 63 | */ |
| 64 | FIB_PATH_TYPE_RECURSIVE, |
| 65 | /** |
| 66 | * special. nothing is known. so we drop. |
| 67 | */ |
| 68 | FIB_PATH_TYPE_SPECIAL, |
| 69 | /** |
| 70 | * exclusive. user provided adj. |
| 71 | */ |
| 72 | FIB_PATH_TYPE_EXCLUSIVE, |
| 73 | /** |
| 74 | * deag. Link to a lookup adj in the next table |
| 75 | */ |
| 76 | FIB_PATH_TYPE_DEAG, |
| 77 | /** |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 78 | * interface receive. |
| 79 | */ |
| 80 | FIB_PATH_TYPE_INTF_RX, |
| 81 | /** |
Neale Ranns | 810086d | 2017-11-05 16:26:46 -0800 | [diff] [blame] | 82 | * interface receive. |
| 83 | */ |
| 84 | FIB_PATH_TYPE_UDP_ENCAP, |
| 85 | /** |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 86 | * receive. it's for-us. |
| 87 | */ |
| 88 | FIB_PATH_TYPE_RECEIVE, |
| 89 | /** |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 90 | * bier-imp. it's via a BIER imposition. |
| 91 | */ |
| 92 | FIB_PATH_TYPE_BIER_IMP, |
| 93 | /** |
| 94 | * bier-fmask. it's via a BIER ECMP-table. |
| 95 | */ |
| 96 | FIB_PATH_TYPE_BIER_TABLE, |
| 97 | /** |
| 98 | * bier-fmask. it's via a BIER f-mask. |
| 99 | */ |
| 100 | FIB_PATH_TYPE_BIER_FMASK, |
| 101 | /** |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 102 | * Marker. Add new types before this one, then update it. |
| 103 | */ |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 104 | FIB_PATH_TYPE_LAST = FIB_PATH_TYPE_BIER_FMASK, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 105 | } __attribute__ ((packed)) fib_path_type_t; |
| 106 | |
| 107 | /** |
| 108 | * The maximum number of path_types |
| 109 | */ |
| 110 | #define FIB_PATH_TYPE_MAX (FIB_PATH_TYPE_LAST + 1) |
| 111 | |
| 112 | #define FIB_PATH_TYPES { \ |
| 113 | [FIB_PATH_TYPE_ATTACHED_NEXT_HOP] = "attached-nexthop", \ |
| 114 | [FIB_PATH_TYPE_ATTACHED] = "attached", \ |
| 115 | [FIB_PATH_TYPE_RECURSIVE] = "recursive", \ |
| 116 | [FIB_PATH_TYPE_SPECIAL] = "special", \ |
| 117 | [FIB_PATH_TYPE_EXCLUSIVE] = "exclusive", \ |
| 118 | [FIB_PATH_TYPE_DEAG] = "deag", \ |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 119 | [FIB_PATH_TYPE_INTF_RX] = "intf-rx", \ |
Neale Ranns | 810086d | 2017-11-05 16:26:46 -0800 | [diff] [blame] | 120 | [FIB_PATH_TYPE_UDP_ENCAP] = "udp-encap", \ |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 121 | [FIB_PATH_TYPE_RECEIVE] = "receive", \ |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 122 | [FIB_PATH_TYPE_BIER_IMP] = "bier-imp", \ |
| 123 | [FIB_PATH_TYPE_BIER_TABLE] = "bier-table", \ |
| 124 | [FIB_PATH_TYPE_BIER_FMASK] = "bier-fmask", \ |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 125 | } |
| 126 | |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 127 | #define FOR_EACH_FIB_PATH_TYPE(_item) \ |
| 128 | for (_item = FIB_PATH_TYPE_FIRST; \ |
| 129 | _item <= FIB_PATH_TYPE_LAST; \ |
| 130 | _item++) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 131 | |
| 132 | /** |
| 133 | * Enurmeration of path operational (i.e. derived) attributes |
| 134 | */ |
| 135 | typedef enum fib_path_oper_attribute_t_ { |
| 136 | /** |
| 137 | * Marker. Add new types after this one. |
| 138 | */ |
| 139 | FIB_PATH_OPER_ATTRIBUTE_FIRST = 0, |
| 140 | /** |
| 141 | * The path forms part of a recursive loop. |
| 142 | */ |
| 143 | FIB_PATH_OPER_ATTRIBUTE_RECURSIVE_LOOP = FIB_PATH_OPER_ATTRIBUTE_FIRST, |
| 144 | /** |
| 145 | * The path is resolved |
| 146 | */ |
| 147 | FIB_PATH_OPER_ATTRIBUTE_RESOLVED, |
| 148 | /** |
Neale Ranns | 4b919a5 | 2017-03-11 05:55:21 -0800 | [diff] [blame] | 149 | * The path is attached, despite what the next-hop may say. |
| 150 | */ |
| 151 | FIB_PATH_OPER_ATTRIBUTE_ATTACHED, |
| 152 | /** |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 153 | * The path has become a permanent drop. |
| 154 | */ |
| 155 | FIB_PATH_OPER_ATTRIBUTE_DROP, |
| 156 | /** |
| 157 | * Marker. Add new types before this one, then update it. |
| 158 | */ |
| 159 | FIB_PATH_OPER_ATTRIBUTE_LAST = FIB_PATH_OPER_ATTRIBUTE_DROP, |
| 160 | } __attribute__ ((packed)) fib_path_oper_attribute_t; |
| 161 | |
| 162 | /** |
| 163 | * The maximum number of path operational attributes |
| 164 | */ |
| 165 | #define FIB_PATH_OPER_ATTRIBUTE_MAX (FIB_PATH_OPER_ATTRIBUTE_LAST + 1) |
| 166 | |
| 167 | #define FIB_PATH_OPER_ATTRIBUTES { \ |
| 168 | [FIB_PATH_OPER_ATTRIBUTE_RECURSIVE_LOOP] = "recursive-loop", \ |
| 169 | [FIB_PATH_OPER_ATTRIBUTE_RESOLVED] = "resolved", \ |
| 170 | [FIB_PATH_OPER_ATTRIBUTE_DROP] = "drop", \ |
| 171 | } |
| 172 | |
| 173 | #define FOR_EACH_FIB_PATH_OPER_ATTRIBUTE(_item) \ |
| 174 | for (_item = FIB_PATH_OPER_ATTRIBUTE_FIRST; \ |
| 175 | _item <= FIB_PATH_OPER_ATTRIBUTE_LAST; \ |
| 176 | _item++) |
| 177 | |
| 178 | /** |
| 179 | * Path flags from the attributes |
| 180 | */ |
| 181 | typedef enum fib_path_oper_flags_t_ { |
| 182 | FIB_PATH_OPER_FLAG_NONE = 0, |
| 183 | FIB_PATH_OPER_FLAG_RECURSIVE_LOOP = (1 << FIB_PATH_OPER_ATTRIBUTE_RECURSIVE_LOOP), |
| 184 | FIB_PATH_OPER_FLAG_DROP = (1 << FIB_PATH_OPER_ATTRIBUTE_DROP), |
| 185 | FIB_PATH_OPER_FLAG_RESOLVED = (1 << FIB_PATH_OPER_ATTRIBUTE_RESOLVED), |
Neale Ranns | 4b919a5 | 2017-03-11 05:55:21 -0800 | [diff] [blame] | 186 | FIB_PATH_OPER_FLAG_ATTACHED = (1 << FIB_PATH_OPER_ATTRIBUTE_ATTACHED), |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 187 | } __attribute__ ((packed)) fib_path_oper_flags_t; |
| 188 | |
| 189 | /** |
| 190 | * A FIB path |
| 191 | */ |
| 192 | typedef struct fib_path_t_ { |
| 193 | /** |
| 194 | * A path is a node in the FIB graph. |
| 195 | */ |
| 196 | fib_node_t fp_node; |
| 197 | |
| 198 | /** |
| 199 | * The index of the path-list to which this path belongs |
| 200 | */ |
| 201 | u32 fp_pl_index; |
| 202 | |
| 203 | /** |
| 204 | * This marks the start of the memory area used to hash |
| 205 | * the path |
| 206 | */ |
| 207 | STRUCT_MARK(path_hash_start); |
| 208 | |
| 209 | /** |
| 210 | * Configuration Flags |
| 211 | */ |
| 212 | fib_path_cfg_flags_t fp_cfg_flags; |
| 213 | |
| 214 | /** |
| 215 | * The type of the path. This is the selector for the union |
| 216 | */ |
| 217 | fib_path_type_t fp_type; |
| 218 | |
| 219 | /** |
| 220 | * The protocol of the next-hop, i.e. the address family of the |
| 221 | * next-hop's address. We can't derive this from the address itself |
| 222 | * since the address can be all zeros |
| 223 | */ |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 224 | dpo_proto_t fp_nh_proto; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 225 | |
| 226 | /** |
Neale Ranns | 57b5860 | 2017-07-15 07:37:25 -0700 | [diff] [blame] | 227 | * UCMP [unnormalised] weigth |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 228 | */ |
Neale Ranns | a0a908f | 2017-08-01 11:40:03 -0700 | [diff] [blame] | 229 | u8 fp_weight; |
| 230 | |
Neale Ranns | 57b5860 | 2017-07-15 07:37:25 -0700 | [diff] [blame] | 231 | /** |
| 232 | * A path preference. 0 is the best. |
| 233 | * Only paths of the best preference, that are 'up', are considered |
| 234 | * for forwarding. |
| 235 | */ |
Neale Ranns | a0a908f | 2017-08-01 11:40:03 -0700 | [diff] [blame] | 236 | u8 fp_preference; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 237 | |
| 238 | /** |
| 239 | * per-type union of the data required to resolve the path |
| 240 | */ |
| 241 | union { |
| 242 | struct { |
| 243 | /** |
| 244 | * The next-hop |
| 245 | */ |
| 246 | ip46_address_t fp_nh; |
| 247 | /** |
| 248 | * The interface |
| 249 | */ |
| 250 | u32 fp_interface; |
| 251 | } attached_next_hop; |
| 252 | struct { |
| 253 | /** |
| 254 | * The interface |
| 255 | */ |
| 256 | u32 fp_interface; |
| 257 | } attached; |
| 258 | struct { |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 259 | union |
| 260 | { |
| 261 | /** |
| 262 | * The next-hop |
| 263 | */ |
| 264 | ip46_address_t fp_ip; |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 265 | struct { |
| 266 | /** |
| 267 | * The local label to resolve through. |
| 268 | */ |
| 269 | mpls_label_t fp_local_label; |
| 270 | /** |
| 271 | * The EOS bit of the resolving label |
| 272 | */ |
| 273 | mpls_eos_bit_t fp_eos; |
| 274 | }; |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 275 | } fp_nh; |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 276 | union { |
| 277 | /** |
| 278 | * The FIB table index in which to find the next-hop. |
| 279 | */ |
| 280 | fib_node_index_t fp_tbl_id; |
| 281 | /** |
| 282 | * The BIER FIB the fmask is in |
| 283 | */ |
| 284 | index_t fp_bier_fib; |
| 285 | }; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 286 | } recursive; |
| 287 | struct { |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 288 | /** |
| 289 | * The next-hop |
| 290 | */ |
| 291 | ip46_address_t fp_nh; |
| 292 | /** |
| 293 | * The BIER FIB the fmask is in |
| 294 | */ |
| 295 | index_t fp_bier_fib; |
| 296 | } bier_fmask; |
| 297 | struct { |
| 298 | /** |
| 299 | * The BIER table's ID |
| 300 | */ |
| 301 | bier_table_id_t fp_bier_tbl; |
| 302 | } bier_table; |
| 303 | struct { |
| 304 | /** |
| 305 | * The BIER imposition object |
| 306 | * this is part of the path's key, since the index_t |
| 307 | * of an imposition object is the object's key. |
| 308 | */ |
| 309 | index_t fp_bier_imp; |
| 310 | } bier_imp; |
| 311 | struct { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 312 | /** |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 313 | * The FIB index in which to perfom the next lookup |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 314 | */ |
| 315 | fib_node_index_t fp_tbl_id; |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 316 | /** |
| 317 | * The RPF-ID to tag the packets with |
| 318 | */ |
| 319 | fib_rpf_id_t fp_rpf_id; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 320 | } deag; |
| 321 | struct { |
| 322 | } special; |
| 323 | struct { |
| 324 | /** |
| 325 | * The user provided 'exclusive' DPO |
| 326 | */ |
| 327 | dpo_id_t fp_ex_dpo; |
| 328 | } exclusive; |
| 329 | struct { |
| 330 | /** |
| 331 | * The interface on which the local address is configured |
| 332 | */ |
| 333 | u32 fp_interface; |
| 334 | /** |
| 335 | * The next-hop |
| 336 | */ |
| 337 | ip46_address_t fp_addr; |
| 338 | } receive; |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 339 | struct { |
| 340 | /** |
| 341 | * The interface on which the packets will be input. |
| 342 | */ |
| 343 | u32 fp_interface; |
| 344 | } intf_rx; |
Neale Ranns | 810086d | 2017-11-05 16:26:46 -0800 | [diff] [blame] | 345 | struct { |
| 346 | /** |
| 347 | * The UDP Encap object this path resolves through |
| 348 | */ |
| 349 | u32 fp_udp_encap_id; |
| 350 | } udp_encap; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 351 | }; |
| 352 | STRUCT_MARK(path_hash_end); |
| 353 | |
| 354 | /** |
| 355 | * Memebers in this last section represent information that is |
| 356 | * dervied during resolution. It should not be copied to new paths |
| 357 | * nor compared. |
| 358 | */ |
| 359 | |
| 360 | /** |
| 361 | * Operational Flags |
| 362 | */ |
| 363 | fib_path_oper_flags_t fp_oper_flags; |
| 364 | |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 365 | union { |
| 366 | /** |
| 367 | * the resolving via fib. not part of the union, since it it not part |
| 368 | * of the path's hash. |
| 369 | */ |
| 370 | fib_node_index_t fp_via_fib; |
| 371 | /** |
| 372 | * the resolving bier-fmask |
| 373 | */ |
| 374 | index_t fp_via_bier_fmask; |
| 375 | /** |
| 376 | * the resolving bier-table |
| 377 | */ |
| 378 | index_t fp_via_bier_tbl; |
| 379 | }; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 380 | |
| 381 | /** |
| 382 | * The Data-path objects through which this path resolves for IP. |
| 383 | */ |
| 384 | dpo_id_t fp_dpo; |
| 385 | |
| 386 | /** |
| 387 | * the index of this path in the parent's child list. |
| 388 | */ |
| 389 | u32 fp_sibling; |
| 390 | } fib_path_t; |
| 391 | |
| 392 | /* |
| 393 | * Array of strings/names for the path types and attributes |
| 394 | */ |
| 395 | static const char *fib_path_type_names[] = FIB_PATH_TYPES; |
| 396 | static const char *fib_path_oper_attribute_names[] = FIB_PATH_OPER_ATTRIBUTES; |
| 397 | static const char *fib_path_cfg_attribute_names[] = FIB_PATH_CFG_ATTRIBUTES; |
| 398 | |
| 399 | /* |
| 400 | * The memory pool from which we allocate all the paths |
| 401 | */ |
| 402 | static fib_path_t *fib_path_pool; |
| 403 | |
| 404 | /* |
| 405 | * Debug macro |
| 406 | */ |
| 407 | #ifdef FIB_DEBUG |
| 408 | #define FIB_PATH_DBG(_p, _fmt, _args...) \ |
| 409 | { \ |
| 410 | u8 *_tmp = NULL; \ |
| 411 | _tmp = fib_path_format(fib_path_get_index(_p), _tmp); \ |
| 412 | clib_warning("path:[%d:%s]:" _fmt, \ |
| 413 | fib_path_get_index(_p), _tmp, \ |
| 414 | ##_args); \ |
| 415 | vec_free(_tmp); \ |
| 416 | } |
| 417 | #else |
| 418 | #define FIB_PATH_DBG(_p, _fmt, _args...) |
| 419 | #endif |
| 420 | |
| 421 | static fib_path_t * |
| 422 | fib_path_get (fib_node_index_t index) |
| 423 | { |
| 424 | return (pool_elt_at_index(fib_path_pool, index)); |
| 425 | } |
| 426 | |
| 427 | static fib_node_index_t |
| 428 | fib_path_get_index (fib_path_t *path) |
| 429 | { |
| 430 | return (path - fib_path_pool); |
| 431 | } |
| 432 | |
| 433 | static fib_node_t * |
| 434 | fib_path_get_node (fib_node_index_t index) |
| 435 | { |
| 436 | return ((fib_node_t*)fib_path_get(index)); |
| 437 | } |
| 438 | |
| 439 | static fib_path_t* |
| 440 | fib_path_from_fib_node (fib_node_t *node) |
| 441 | { |
| 442 | #if CLIB_DEBUG > 0 |
| 443 | ASSERT(FIB_NODE_TYPE_PATH == node->fn_type); |
| 444 | #endif |
| 445 | return ((fib_path_t*)node); |
| 446 | } |
| 447 | |
| 448 | u8 * |
| 449 | format_fib_path (u8 * s, va_list * args) |
| 450 | { |
| 451 | fib_path_t *path = va_arg (*args, fib_path_t *); |
| 452 | vnet_main_t * vnm = vnet_get_main(); |
| 453 | fib_path_oper_attribute_t oattr; |
| 454 | fib_path_cfg_attribute_t cattr; |
| 455 | |
| 456 | s = format (s, " index:%d ", fib_path_get_index(path)); |
| 457 | s = format (s, "pl-index:%d ", path->fp_pl_index); |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 458 | s = format (s, "%U ", format_dpo_proto, path->fp_nh_proto); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 459 | s = format (s, "weight=%d ", path->fp_weight); |
Neale Ranns | 57b5860 | 2017-07-15 07:37:25 -0700 | [diff] [blame] | 460 | s = format (s, "pref=%d ", path->fp_preference); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 461 | s = format (s, "%s: ", fib_path_type_names[path->fp_type]); |
| 462 | if (FIB_PATH_OPER_FLAG_NONE != path->fp_oper_flags) { |
| 463 | s = format(s, " oper-flags:"); |
| 464 | FOR_EACH_FIB_PATH_OPER_ATTRIBUTE(oattr) { |
| 465 | if ((1<<oattr) & path->fp_oper_flags) { |
| 466 | s = format (s, "%s,", fib_path_oper_attribute_names[oattr]); |
| 467 | } |
| 468 | } |
| 469 | } |
| 470 | if (FIB_PATH_CFG_FLAG_NONE != path->fp_cfg_flags) { |
| 471 | s = format(s, " cfg-flags:"); |
| 472 | FOR_EACH_FIB_PATH_CFG_ATTRIBUTE(cattr) { |
| 473 | if ((1<<cattr) & path->fp_cfg_flags) { |
| 474 | s = format (s, "%s,", fib_path_cfg_attribute_names[cattr]); |
| 475 | } |
| 476 | } |
| 477 | } |
| 478 | s = format(s, "\n "); |
| 479 | |
| 480 | switch (path->fp_type) |
| 481 | { |
| 482 | case FIB_PATH_TYPE_ATTACHED_NEXT_HOP: |
| 483 | s = format (s, "%U", format_ip46_address, |
| 484 | &path->attached_next_hop.fp_nh, |
| 485 | IP46_TYPE_ANY); |
| 486 | if (path->fp_oper_flags & FIB_PATH_OPER_FLAG_DROP) |
| 487 | { |
| 488 | s = format (s, " if_index:%d", path->attached_next_hop.fp_interface); |
| 489 | } |
| 490 | else |
| 491 | { |
| 492 | s = format (s, " %U", |
| 493 | format_vnet_sw_interface_name, |
| 494 | vnm, |
| 495 | vnet_get_sw_interface( |
| 496 | vnm, |
| 497 | path->attached_next_hop.fp_interface)); |
| 498 | if (vnet_sw_interface_is_p2p(vnet_get_main(), |
| 499 | path->attached_next_hop.fp_interface)) |
| 500 | { |
| 501 | s = format (s, " (p2p)"); |
| 502 | } |
| 503 | } |
| 504 | if (!dpo_id_is_valid(&path->fp_dpo)) |
| 505 | { |
| 506 | s = format(s, "\n unresolved"); |
| 507 | } |
| 508 | else |
| 509 | { |
| 510 | s = format(s, "\n %U", |
| 511 | format_dpo_id, |
| 512 | &path->fp_dpo, 13); |
| 513 | } |
| 514 | break; |
| 515 | case FIB_PATH_TYPE_ATTACHED: |
| 516 | if (path->fp_oper_flags & FIB_PATH_OPER_FLAG_DROP) |
| 517 | { |
| 518 | s = format (s, " if_index:%d", path->attached_next_hop.fp_interface); |
| 519 | } |
| 520 | else |
| 521 | { |
| 522 | s = format (s, " %U", |
| 523 | format_vnet_sw_interface_name, |
| 524 | vnm, |
| 525 | vnet_get_sw_interface( |
| 526 | vnm, |
| 527 | path->attached.fp_interface)); |
| 528 | } |
| 529 | break; |
| 530 | case FIB_PATH_TYPE_RECURSIVE: |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 531 | if (DPO_PROTO_MPLS == path->fp_nh_proto) |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 532 | { |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 533 | s = format (s, "via %U %U", |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 534 | format_mpls_unicast_label, |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 535 | path->recursive.fp_nh.fp_local_label, |
| 536 | format_mpls_eos_bit, |
| 537 | path->recursive.fp_nh.fp_eos); |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 538 | } |
| 539 | else |
| 540 | { |
| 541 | s = format (s, "via %U", |
| 542 | format_ip46_address, |
| 543 | &path->recursive.fp_nh.fp_ip, |
| 544 | IP46_TYPE_ANY); |
| 545 | } |
| 546 | s = format (s, " in fib:%d", |
| 547 | path->recursive.fp_tbl_id, |
| 548 | path->fp_via_fib); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 549 | s = format (s, " via-fib:%d", path->fp_via_fib); |
| 550 | s = format (s, " via-dpo:[%U:%d]", |
| 551 | format_dpo_type, path->fp_dpo.dpoi_type, |
| 552 | path->fp_dpo.dpoi_index); |
| 553 | |
| 554 | break; |
Neale Ranns | 810086d | 2017-11-05 16:26:46 -0800 | [diff] [blame] | 555 | case FIB_PATH_TYPE_UDP_ENCAP: |
| 556 | s = format (s, " UDP-encap ID:%d", path->udp_encap.fp_udp_encap_id); |
| 557 | break; |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 558 | case FIB_PATH_TYPE_BIER_TABLE: |
| 559 | s = format (s, "via bier-table:[%U}", |
| 560 | format_bier_table_id, |
| 561 | &path->bier_table.fp_bier_tbl); |
| 562 | s = format (s, " via-dpo:[%U:%d]", |
| 563 | format_dpo_type, path->fp_dpo.dpoi_type, |
| 564 | path->fp_dpo.dpoi_index); |
| 565 | break; |
| 566 | case FIB_PATH_TYPE_BIER_FMASK: |
| 567 | s = format (s, "via %U", |
| 568 | format_ip46_address, |
| 569 | &path->bier_fmask.fp_nh, |
| 570 | IP46_TYPE_ANY); |
| 571 | s = format (s, " in BIER-fib:%d", |
| 572 | path->bier_fmask.fp_bier_fib, |
| 573 | path->fp_via_fib); |
| 574 | s = format (s, " via-fmask:%d", path->fp_via_bier_fmask); |
| 575 | s = format (s, " via-dpo:[%U:%d]", |
| 576 | format_dpo_type, path->fp_dpo.dpoi_type, |
| 577 | path->fp_dpo.dpoi_index); |
| 578 | break; |
| 579 | case FIB_PATH_TYPE_BIER_IMP: |
| 580 | s = format (s, "via %U", format_bier_imp, |
| 581 | path->bier_imp.fp_bier_imp, 0, BIER_SHOW_BRIEF); |
| 582 | break; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 583 | case FIB_PATH_TYPE_RECEIVE: |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 584 | case FIB_PATH_TYPE_INTF_RX: |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 585 | case FIB_PATH_TYPE_SPECIAL: |
| 586 | case FIB_PATH_TYPE_DEAG: |
| 587 | case FIB_PATH_TYPE_EXCLUSIVE: |
| 588 | if (dpo_id_is_valid(&path->fp_dpo)) |
| 589 | { |
| 590 | s = format(s, "%U", format_dpo_id, |
| 591 | &path->fp_dpo, 2); |
| 592 | } |
| 593 | break; |
| 594 | } |
| 595 | return (s); |
| 596 | } |
| 597 | |
| 598 | u8 * |
| 599 | fib_path_format (fib_node_index_t pi, u8 *s) |
| 600 | { |
| 601 | fib_path_t *path; |
| 602 | |
| 603 | path = fib_path_get(pi); |
| 604 | ASSERT(NULL != path); |
| 605 | |
| 606 | return (format (s, "%U", format_fib_path, path)); |
| 607 | } |
| 608 | |
| 609 | u8 * |
| 610 | fib_path_adj_format (fib_node_index_t pi, |
| 611 | u32 indent, |
| 612 | u8 *s) |
| 613 | { |
| 614 | fib_path_t *path; |
| 615 | |
| 616 | path = fib_path_get(pi); |
| 617 | ASSERT(NULL != path); |
| 618 | |
| 619 | if (!dpo_id_is_valid(&path->fp_dpo)) |
| 620 | { |
| 621 | s = format(s, " unresolved"); |
| 622 | } |
| 623 | else |
| 624 | { |
| 625 | s = format(s, "%U", format_dpo_id, |
| 626 | &path->fp_dpo, 2); |
| 627 | } |
| 628 | |
| 629 | return (s); |
| 630 | } |
| 631 | |
| 632 | /* |
| 633 | * fib_path_last_lock_gone |
| 634 | * |
| 635 | * We don't share paths, we share path lists, so the [un]lock functions |
| 636 | * are no-ops |
| 637 | */ |
| 638 | static void |
| 639 | fib_path_last_lock_gone (fib_node_t *node) |
| 640 | { |
| 641 | ASSERT(0); |
| 642 | } |
| 643 | |
| 644 | static const adj_index_t |
| 645 | fib_path_attached_next_hop_get_adj (fib_path_t *path, |
Neale Ranns | 924d03a | 2016-10-19 08:25:46 +0100 | [diff] [blame] | 646 | vnet_link_t link) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 647 | { |
| 648 | if (vnet_sw_interface_is_p2p(vnet_get_main(), |
| 649 | path->attached_next_hop.fp_interface)) |
| 650 | { |
| 651 | /* |
| 652 | * if the interface is p2p then the adj for the specific |
| 653 | * neighbour on that link will never exist. on p2p links |
| 654 | * the subnet address (the attached route) links to the |
| 655 | * auto-adj (see below), we want that adj here too. |
| 656 | */ |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 657 | return (adj_nbr_add_or_lock(dpo_proto_to_fib(path->fp_nh_proto), |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 658 | link, |
| 659 | &zero_addr, |
| 660 | path->attached_next_hop.fp_interface)); |
| 661 | } |
| 662 | else |
| 663 | { |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 664 | return (adj_nbr_add_or_lock(dpo_proto_to_fib(path->fp_nh_proto), |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 665 | link, |
| 666 | &path->attached_next_hop.fp_nh, |
| 667 | path->attached_next_hop.fp_interface)); |
| 668 | } |
| 669 | } |
| 670 | |
| 671 | static void |
| 672 | fib_path_attached_next_hop_set (fib_path_t *path) |
| 673 | { |
| 674 | /* |
| 675 | * resolve directly via the adjacnecy discribed by the |
| 676 | * interface and next-hop |
| 677 | */ |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 678 | dpo_set(&path->fp_dpo, |
| 679 | DPO_ADJACENCY, |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 680 | path->fp_nh_proto, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 681 | fib_path_attached_next_hop_get_adj( |
| 682 | path, |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 683 | dpo_proto_to_link(path->fp_nh_proto))); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 684 | |
| 685 | /* |
| 686 | * become a child of the adjacency so we receive updates |
| 687 | * when its rewrite changes |
| 688 | */ |
| 689 | path->fp_sibling = adj_child_add(path->fp_dpo.dpoi_index, |
| 690 | FIB_NODE_TYPE_PATH, |
| 691 | fib_path_get_index(path)); |
Neale Ranns | 88fc83e | 2017-04-05 08:11:14 -0700 | [diff] [blame] | 692 | |
| 693 | if (!vnet_sw_interface_is_admin_up(vnet_get_main(), |
| 694 | path->attached_next_hop.fp_interface) || |
| 695 | !adj_is_up(path->fp_dpo.dpoi_index)) |
| 696 | { |
| 697 | path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED; |
| 698 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 699 | } |
| 700 | |
Neale Ranns | 8c4611b | 2017-05-23 03:43:47 -0700 | [diff] [blame] | 701 | static const adj_index_t |
| 702 | fib_path_attached_get_adj (fib_path_t *path, |
| 703 | vnet_link_t link) |
| 704 | { |
| 705 | if (vnet_sw_interface_is_p2p(vnet_get_main(), |
| 706 | path->attached.fp_interface)) |
| 707 | { |
| 708 | /* |
| 709 | * point-2-point interfaces do not require a glean, since |
| 710 | * there is nothing to ARP. Install a rewrite/nbr adj instead |
| 711 | */ |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 712 | return (adj_nbr_add_or_lock(dpo_proto_to_fib(path->fp_nh_proto), |
Neale Ranns | 8c4611b | 2017-05-23 03:43:47 -0700 | [diff] [blame] | 713 | link, |
| 714 | &zero_addr, |
| 715 | path->attached.fp_interface)); |
| 716 | } |
| 717 | else |
| 718 | { |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 719 | return (adj_glean_add_or_lock(dpo_proto_to_fib(path->fp_nh_proto), |
Neale Ranns | 8c4611b | 2017-05-23 03:43:47 -0700 | [diff] [blame] | 720 | path->attached.fp_interface, |
| 721 | NULL)); |
| 722 | } |
| 723 | } |
| 724 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 725 | /* |
| 726 | * create of update the paths recursive adj |
| 727 | */ |
| 728 | static void |
| 729 | fib_path_recursive_adj_update (fib_path_t *path, |
| 730 | fib_forward_chain_type_t fct, |
| 731 | dpo_id_t *dpo) |
| 732 | { |
Neale Ranns | 948e00f | 2016-10-20 13:39:34 +0100 | [diff] [blame] | 733 | dpo_id_t via_dpo = DPO_INVALID; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 734 | |
| 735 | /* |
| 736 | * get the DPO to resolve through from the via-entry |
| 737 | */ |
| 738 | fib_entry_contribute_forwarding(path->fp_via_fib, |
| 739 | fct, |
| 740 | &via_dpo); |
| 741 | |
| 742 | |
| 743 | /* |
| 744 | * hope for the best - clear if restrictions apply. |
| 745 | */ |
| 746 | path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RESOLVED; |
| 747 | |
| 748 | /* |
| 749 | * Validate any recursion constraints and over-ride the via |
| 750 | * adj if not met |
| 751 | */ |
| 752 | if (path->fp_oper_flags & FIB_PATH_OPER_FLAG_RECURSIVE_LOOP) |
| 753 | { |
| 754 | path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED; |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 755 | dpo_copy(&via_dpo, drop_dpo_get(path->fp_nh_proto)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 756 | } |
| 757 | else if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_RESOLVE_HOST) |
| 758 | { |
| 759 | /* |
| 760 | * the via FIB must be a host route. |
| 761 | * note the via FIB just added will always be a host route |
| 762 | * since it is an RR source added host route. So what we need to |
| 763 | * check is whether the route has other sources. If it does then |
| 764 | * some other source has added it as a host route. If it doesn't |
| 765 | * then it was added only here and inherits forwarding from a cover. |
| 766 | * the cover is not a host route. |
| 767 | * The RR source is the lowest priority source, so we check if it |
| 768 | * is the best. if it is there are no other sources. |
| 769 | */ |
| 770 | if (fib_entry_get_best_source(path->fp_via_fib) >= FIB_SOURCE_RR) |
| 771 | { |
| 772 | path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED; |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 773 | dpo_copy(&via_dpo, drop_dpo_get(path->fp_nh_proto)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 774 | |
| 775 | /* |
| 776 | * PIC edge trigger. let the load-balance maps know |
| 777 | */ |
| 778 | load_balance_map_path_state_change(fib_path_get_index(path)); |
| 779 | } |
| 780 | } |
| 781 | else if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_RESOLVE_ATTACHED) |
| 782 | { |
| 783 | /* |
| 784 | * RR source entries inherit the flags from the cover, so |
| 785 | * we can check the via directly |
| 786 | */ |
| 787 | if (!(FIB_ENTRY_FLAG_ATTACHED & fib_entry_get_flags(path->fp_via_fib))) |
| 788 | { |
| 789 | path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED; |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 790 | dpo_copy(&via_dpo, drop_dpo_get(path->fp_nh_proto)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 791 | |
| 792 | /* |
| 793 | * PIC edge trigger. let the load-balance maps know |
| 794 | */ |
| 795 | load_balance_map_path_state_change(fib_path_get_index(path)); |
| 796 | } |
| 797 | } |
Neale Ranns | 88fc83e | 2017-04-05 08:11:14 -0700 | [diff] [blame] | 798 | /* |
| 799 | * check for over-riding factors on the FIB entry itself |
| 800 | */ |
| 801 | if (!fib_entry_is_resolved(path->fp_via_fib)) |
| 802 | { |
| 803 | path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED; |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 804 | dpo_copy(&via_dpo, drop_dpo_get(path->fp_nh_proto)); |
Neale Ranns | 88fc83e | 2017-04-05 08:11:14 -0700 | [diff] [blame] | 805 | |
| 806 | /* |
| 807 | * PIC edge trigger. let the load-balance maps know |
| 808 | */ |
| 809 | load_balance_map_path_state_change(fib_path_get_index(path)); |
| 810 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 811 | |
| 812 | /* |
Neale Ranns | 57b5860 | 2017-07-15 07:37:25 -0700 | [diff] [blame] | 813 | * If this path is contributing a drop, then it's not resolved |
| 814 | */ |
| 815 | if (dpo_is_drop(&via_dpo) || load_balance_is_drop(&via_dpo)) |
| 816 | { |
| 817 | path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED; |
| 818 | } |
| 819 | |
| 820 | /* |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 821 | * update the path's contributed DPO |
| 822 | */ |
| 823 | dpo_copy(dpo, &via_dpo); |
| 824 | |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 825 | FIB_PATH_DBG(path, "recursive update:"); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 826 | |
| 827 | dpo_reset(&via_dpo); |
| 828 | } |
| 829 | |
| 830 | /* |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 831 | * re-evaulate the forwarding state for a via fmask path |
| 832 | */ |
| 833 | static void |
| 834 | fib_path_bier_fmask_update (fib_path_t *path, |
| 835 | dpo_id_t *dpo) |
| 836 | { |
| 837 | bier_fmask_contribute_forwarding(path->fp_via_bier_fmask, dpo); |
| 838 | |
| 839 | /* |
| 840 | * if we are stakcing on the drop, then the path is not resolved |
| 841 | */ |
| 842 | if (dpo_is_drop(dpo)) |
| 843 | { |
| 844 | path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED; |
| 845 | } |
| 846 | else |
| 847 | { |
| 848 | path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RESOLVED; |
| 849 | } |
| 850 | } |
| 851 | |
| 852 | /* |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 853 | * fib_path_is_permanent_drop |
| 854 | * |
| 855 | * Return !0 if the path is configured to permanently drop, |
| 856 | * despite other attributes. |
| 857 | */ |
| 858 | static int |
| 859 | fib_path_is_permanent_drop (fib_path_t *path) |
| 860 | { |
| 861 | return ((path->fp_cfg_flags & FIB_PATH_CFG_FLAG_DROP) || |
| 862 | (path->fp_oper_flags & FIB_PATH_OPER_FLAG_DROP)); |
| 863 | } |
| 864 | |
| 865 | /* |
| 866 | * fib_path_unresolve |
| 867 | * |
| 868 | * Remove our dependency on the resolution target |
| 869 | */ |
| 870 | static void |
| 871 | fib_path_unresolve (fib_path_t *path) |
| 872 | { |
| 873 | /* |
| 874 | * the forced drop path does not need unresolving |
| 875 | */ |
| 876 | if (fib_path_is_permanent_drop(path)) |
| 877 | { |
| 878 | return; |
| 879 | } |
| 880 | |
| 881 | switch (path->fp_type) |
| 882 | { |
| 883 | case FIB_PATH_TYPE_RECURSIVE: |
| 884 | if (FIB_NODE_INDEX_INVALID != path->fp_via_fib) |
| 885 | { |
| 886 | fib_prefix_t pfx; |
| 887 | |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 888 | fib_entry_get_prefix(path->fp_via_fib, &pfx); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 889 | fib_entry_child_remove(path->fp_via_fib, |
| 890 | path->fp_sibling); |
| 891 | fib_table_entry_special_remove(path->recursive.fp_tbl_id, |
| 892 | &pfx, |
| 893 | FIB_SOURCE_RR); |
| 894 | path->fp_via_fib = FIB_NODE_INDEX_INVALID; |
| 895 | } |
| 896 | break; |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 897 | case FIB_PATH_TYPE_BIER_FMASK: |
| 898 | if (FIB_NODE_INDEX_INVALID != path->fp_via_bier_fmask) |
| 899 | { |
| 900 | bier_fmask_child_remove(path->fp_via_bier_fmask, |
| 901 | path->fp_sibling); |
| 902 | path->fp_via_bier_fmask = FIB_NODE_INDEX_INVALID; |
| 903 | } |
| 904 | break; |
| 905 | case FIB_PATH_TYPE_BIER_IMP: |
| 906 | bier_imp_unlock(path->fp_dpo.dpoi_index); |
| 907 | break; |
| 908 | case FIB_PATH_TYPE_BIER_TABLE: |
| 909 | bier_table_ecmp_unlock(path->fp_via_bier_tbl); |
| 910 | break; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 911 | case FIB_PATH_TYPE_ATTACHED_NEXT_HOP: |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 912 | adj_child_remove(path->fp_dpo.dpoi_index, |
| 913 | path->fp_sibling); |
| 914 | adj_unlock(path->fp_dpo.dpoi_index); |
| 915 | break; |
Neale Ranns | 6f63115 | 2017-10-03 08:20:21 -0700 | [diff] [blame] | 916 | case FIB_PATH_TYPE_ATTACHED: |
| 917 | if (DPO_PROTO_ETHERNET != path->fp_nh_proto) |
| 918 | { |
| 919 | adj_child_remove(path->fp_dpo.dpoi_index, |
| 920 | path->fp_sibling); |
| 921 | adj_unlock(path->fp_dpo.dpoi_index); |
| 922 | } |
| 923 | break; |
Neale Ranns | 810086d | 2017-11-05 16:26:46 -0800 | [diff] [blame] | 924 | case FIB_PATH_TYPE_UDP_ENCAP: |
| 925 | udp_encap_unlock_w_index(path->fp_dpo.dpoi_index); |
| 926 | break; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 927 | case FIB_PATH_TYPE_EXCLUSIVE: |
| 928 | dpo_reset(&path->exclusive.fp_ex_dpo); |
| 929 | break; |
| 930 | case FIB_PATH_TYPE_SPECIAL: |
| 931 | case FIB_PATH_TYPE_RECEIVE: |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 932 | case FIB_PATH_TYPE_INTF_RX: |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 933 | case FIB_PATH_TYPE_DEAG: |
| 934 | /* |
| 935 | * these hold only the path's DPO, which is reset below. |
| 936 | */ |
| 937 | break; |
| 938 | } |
| 939 | |
| 940 | /* |
| 941 | * release the adj we were holding and pick up the |
| 942 | * drop just in case. |
| 943 | */ |
| 944 | dpo_reset(&path->fp_dpo); |
| 945 | path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED; |
| 946 | |
| 947 | return; |
| 948 | } |
| 949 | |
| 950 | static fib_forward_chain_type_t |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 951 | fib_path_to_chain_type (const fib_path_t *path) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 952 | { |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 953 | if (DPO_PROTO_MPLS == path->fp_nh_proto) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 954 | { |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 955 | if (FIB_PATH_TYPE_RECURSIVE == path->fp_type && |
| 956 | MPLS_EOS == path->recursive.fp_nh.fp_eos) |
| 957 | { |
| 958 | return (FIB_FORW_CHAIN_TYPE_MPLS_EOS); |
| 959 | } |
| 960 | else |
| 961 | { |
Neale Ranns | 9f171f5 | 2017-04-11 08:56:53 -0700 | [diff] [blame] | 962 | return (FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS); |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 963 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 964 | } |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 965 | else |
| 966 | { |
| 967 | return (fib_forw_chain_type_from_dpo_proto(path->fp_nh_proto)); |
| 968 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 969 | } |
| 970 | |
| 971 | /* |
| 972 | * fib_path_back_walk_notify |
| 973 | * |
| 974 | * A back walk has reach this path. |
| 975 | */ |
| 976 | static fib_node_back_walk_rc_t |
| 977 | fib_path_back_walk_notify (fib_node_t *node, |
| 978 | fib_node_back_walk_ctx_t *ctx) |
| 979 | { |
| 980 | fib_path_t *path; |
| 981 | |
| 982 | path = fib_path_from_fib_node(node); |
| 983 | |
| 984 | switch (path->fp_type) |
| 985 | { |
| 986 | case FIB_PATH_TYPE_RECURSIVE: |
| 987 | if (FIB_NODE_BW_REASON_FLAG_EVALUATE & ctx->fnbw_reason) |
| 988 | { |
| 989 | /* |
| 990 | * modify the recursive adjacency to use the new forwarding |
| 991 | * of the via-fib. |
| 992 | * this update is visible to packets in flight in the DP. |
| 993 | */ |
| 994 | fib_path_recursive_adj_update( |
| 995 | path, |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 996 | fib_path_to_chain_type(path), |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 997 | &path->fp_dpo); |
| 998 | } |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 999 | if ((FIB_NODE_BW_REASON_FLAG_ADJ_UPDATE & ctx->fnbw_reason) || |
| 1000 | (FIB_NODE_BW_REASON_FLAG_ADJ_DOWN & ctx->fnbw_reason)) |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 1001 | { |
| 1002 | /* |
| 1003 | * ADJ updates (complete<->incomplete) do not need to propagate to |
| 1004 | * recursive entries. |
| 1005 | * The only reason its needed as far back as here, is that the adj |
| 1006 | * and the incomplete adj are a different DPO type, so the LBs need |
| 1007 | * to re-stack. |
| 1008 | * If this walk was quashed in the fib_entry, then any non-fib_path |
| 1009 | * children (like tunnels that collapse out the LB when they stack) |
| 1010 | * would not see the update. |
| 1011 | */ |
| 1012 | return (FIB_NODE_BACK_WALK_CONTINUE); |
| 1013 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1014 | break; |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 1015 | case FIB_PATH_TYPE_BIER_FMASK: |
| 1016 | if (FIB_NODE_BW_REASON_FLAG_EVALUATE & ctx->fnbw_reason) |
| 1017 | { |
| 1018 | /* |
| 1019 | * update to use the BIER fmask's new forwading |
| 1020 | */ |
| 1021 | fib_path_bier_fmask_update(path, &path->fp_dpo); |
| 1022 | } |
| 1023 | if ((FIB_NODE_BW_REASON_FLAG_ADJ_UPDATE & ctx->fnbw_reason) || |
| 1024 | (FIB_NODE_BW_REASON_FLAG_ADJ_DOWN & ctx->fnbw_reason)) |
| 1025 | { |
| 1026 | /* |
| 1027 | * ADJ updates (complete<->incomplete) do not need to propagate to |
| 1028 | * recursive entries. |
| 1029 | * The only reason its needed as far back as here, is that the adj |
| 1030 | * and the incomplete adj are a different DPO type, so the LBs need |
| 1031 | * to re-stack. |
| 1032 | * If this walk was quashed in the fib_entry, then any non-fib_path |
| 1033 | * children (like tunnels that collapse out the LB when they stack) |
| 1034 | * would not see the update. |
| 1035 | */ |
| 1036 | return (FIB_NODE_BACK_WALK_CONTINUE); |
| 1037 | } |
| 1038 | break; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1039 | case FIB_PATH_TYPE_ATTACHED_NEXT_HOP: |
| 1040 | /* |
| 1041 | FIXME comment |
| 1042 | * ADJ_UPDATE backwalk pass silently through here and up to |
| 1043 | * the path-list when the multipath adj collapse occurs. |
| 1044 | * The reason we do this is that the assumtption is that VPP |
| 1045 | * runs in an environment where the Control-Plane is remote |
| 1046 | * and hence reacts slowly to link up down. In order to remove |
| 1047 | * this down link from the ECMP set quickly, we back-walk. |
| 1048 | * VPP also has dedicated CPUs, so we are not stealing resources |
| 1049 | * from the CP to do so. |
| 1050 | */ |
| 1051 | if (FIB_NODE_BW_REASON_FLAG_INTERFACE_UP & ctx->fnbw_reason) |
| 1052 | { |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 1053 | if (path->fp_oper_flags & FIB_PATH_OPER_FLAG_RESOLVED) |
| 1054 | { |
| 1055 | /* |
| 1056 | * alreday resolved. no need to walk back again |
| 1057 | */ |
| 1058 | return (FIB_NODE_BACK_WALK_CONTINUE); |
| 1059 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1060 | path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RESOLVED; |
| 1061 | } |
| 1062 | if (FIB_NODE_BW_REASON_FLAG_INTERFACE_DOWN & ctx->fnbw_reason) |
| 1063 | { |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 1064 | if (!(path->fp_oper_flags & FIB_PATH_OPER_FLAG_RESOLVED)) |
| 1065 | { |
| 1066 | /* |
| 1067 | * alreday unresolved. no need to walk back again |
| 1068 | */ |
| 1069 | return (FIB_NODE_BACK_WALK_CONTINUE); |
| 1070 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1071 | path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED; |
| 1072 | } |
| 1073 | if (FIB_NODE_BW_REASON_FLAG_INTERFACE_DELETE & ctx->fnbw_reason) |
| 1074 | { |
| 1075 | /* |
| 1076 | * The interface this path resolves through has been deleted. |
| 1077 | * This will leave the path in a permanent drop state. The route |
| 1078 | * needs to be removed and readded (and hence the path-list deleted) |
| 1079 | * before it can forward again. |
| 1080 | */ |
| 1081 | fib_path_unresolve(path); |
| 1082 | path->fp_oper_flags |= FIB_PATH_OPER_FLAG_DROP; |
| 1083 | } |
| 1084 | if (FIB_NODE_BW_REASON_FLAG_ADJ_UPDATE & ctx->fnbw_reason) |
| 1085 | { |
| 1086 | /* |
| 1087 | * restack the DPO to pick up the correct DPO sub-type |
| 1088 | */ |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 1089 | uword if_is_up; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1090 | adj_index_t ai; |
| 1091 | |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 1092 | if_is_up = vnet_sw_interface_is_admin_up( |
| 1093 | vnet_get_main(), |
| 1094 | path->attached_next_hop.fp_interface); |
| 1095 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1096 | ai = fib_path_attached_next_hop_get_adj( |
| 1097 | path, |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 1098 | dpo_proto_to_link(path->fp_nh_proto)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1099 | |
Neale Ranns | 88fc83e | 2017-04-05 08:11:14 -0700 | [diff] [blame] | 1100 | path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED; |
| 1101 | if (if_is_up && adj_is_up(ai)) |
| 1102 | { |
| 1103 | path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RESOLVED; |
| 1104 | } |
| 1105 | |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 1106 | dpo_set(&path->fp_dpo, DPO_ADJACENCY, path->fp_nh_proto, ai); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1107 | adj_unlock(ai); |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 1108 | |
| 1109 | if (!if_is_up) |
| 1110 | { |
| 1111 | /* |
| 1112 | * If the interface is not up there is no reason to walk |
| 1113 | * back to children. if we did they would only evalute |
| 1114 | * that this path is unresolved and hence it would |
| 1115 | * not contribute the adjacency - so it would be wasted |
| 1116 | * CPU time. |
| 1117 | */ |
| 1118 | return (FIB_NODE_BACK_WALK_CONTINUE); |
| 1119 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1120 | } |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 1121 | if (FIB_NODE_BW_REASON_FLAG_ADJ_DOWN & ctx->fnbw_reason) |
| 1122 | { |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 1123 | if (!(path->fp_oper_flags & FIB_PATH_OPER_FLAG_RESOLVED)) |
| 1124 | { |
| 1125 | /* |
| 1126 | * alreday unresolved. no need to walk back again |
| 1127 | */ |
| 1128 | return (FIB_NODE_BACK_WALK_CONTINUE); |
| 1129 | } |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 1130 | /* |
| 1131 | * the adj has gone down. the path is no longer resolved. |
| 1132 | */ |
| 1133 | path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED; |
| 1134 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1135 | break; |
| 1136 | case FIB_PATH_TYPE_ATTACHED: |
| 1137 | /* |
| 1138 | * FIXME; this could schedule a lower priority walk, since attached |
| 1139 | * routes are not usually in ECMP configurations so the backwalk to |
| 1140 | * the FIB entry does not need to be high priority |
| 1141 | */ |
| 1142 | if (FIB_NODE_BW_REASON_FLAG_INTERFACE_UP & ctx->fnbw_reason) |
| 1143 | { |
| 1144 | path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RESOLVED; |
| 1145 | } |
| 1146 | if (FIB_NODE_BW_REASON_FLAG_INTERFACE_DOWN & ctx->fnbw_reason) |
| 1147 | { |
| 1148 | path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED; |
| 1149 | } |
| 1150 | if (FIB_NODE_BW_REASON_FLAG_INTERFACE_DELETE & ctx->fnbw_reason) |
| 1151 | { |
| 1152 | fib_path_unresolve(path); |
| 1153 | path->fp_oper_flags |= FIB_PATH_OPER_FLAG_DROP; |
| 1154 | } |
| 1155 | break; |
Neale Ranns | 810086d | 2017-11-05 16:26:46 -0800 | [diff] [blame] | 1156 | case FIB_PATH_TYPE_UDP_ENCAP: |
| 1157 | { |
| 1158 | dpo_id_t via_dpo = DPO_INVALID; |
| 1159 | |
| 1160 | /* |
| 1161 | * hope for the best - clear if restrictions apply. |
| 1162 | */ |
| 1163 | path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RESOLVED; |
| 1164 | |
| 1165 | udp_encap_contribute_forwarding(path->udp_encap.fp_udp_encap_id, |
| 1166 | path->fp_nh_proto, |
| 1167 | &via_dpo); |
| 1168 | /* |
| 1169 | * If this path is contributing a drop, then it's not resolved |
| 1170 | */ |
| 1171 | if (dpo_is_drop(&via_dpo) || load_balance_is_drop(&via_dpo)) |
| 1172 | { |
| 1173 | path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED; |
| 1174 | } |
| 1175 | |
| 1176 | /* |
| 1177 | * update the path's contributed DPO |
| 1178 | */ |
| 1179 | dpo_copy(&path->fp_dpo, &via_dpo); |
| 1180 | dpo_reset(&via_dpo); |
| 1181 | break; |
| 1182 | } |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1183 | case FIB_PATH_TYPE_INTF_RX: |
| 1184 | ASSERT(0); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1185 | case FIB_PATH_TYPE_DEAG: |
| 1186 | /* |
| 1187 | * FIXME When VRF delete is allowed this will need a poke. |
| 1188 | */ |
| 1189 | case FIB_PATH_TYPE_SPECIAL: |
| 1190 | case FIB_PATH_TYPE_RECEIVE: |
| 1191 | case FIB_PATH_TYPE_EXCLUSIVE: |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 1192 | case FIB_PATH_TYPE_BIER_TABLE: |
| 1193 | case FIB_PATH_TYPE_BIER_IMP: |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1194 | /* |
| 1195 | * these path types have no parents. so to be |
| 1196 | * walked from one is unexpected. |
| 1197 | */ |
| 1198 | ASSERT(0); |
| 1199 | break; |
| 1200 | } |
| 1201 | |
| 1202 | /* |
| 1203 | * propagate the backwalk further to the path-list |
| 1204 | */ |
| 1205 | fib_path_list_back_walk(path->fp_pl_index, ctx); |
| 1206 | |
| 1207 | return (FIB_NODE_BACK_WALK_CONTINUE); |
| 1208 | } |
| 1209 | |
Neale Ranns | 6c3ebcc | 2016-10-02 21:20:15 +0100 | [diff] [blame] | 1210 | static void |
| 1211 | fib_path_memory_show (void) |
| 1212 | { |
| 1213 | fib_show_memory_usage("Path", |
| 1214 | pool_elts(fib_path_pool), |
| 1215 | pool_len(fib_path_pool), |
| 1216 | sizeof(fib_path_t)); |
| 1217 | } |
| 1218 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1219 | /* |
| 1220 | * The FIB path's graph node virtual function table |
| 1221 | */ |
| 1222 | static const fib_node_vft_t fib_path_vft = { |
| 1223 | .fnv_get = fib_path_get_node, |
| 1224 | .fnv_last_lock = fib_path_last_lock_gone, |
| 1225 | .fnv_back_walk = fib_path_back_walk_notify, |
Neale Ranns | 6c3ebcc | 2016-10-02 21:20:15 +0100 | [diff] [blame] | 1226 | .fnv_mem_show = fib_path_memory_show, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1227 | }; |
| 1228 | |
| 1229 | static fib_path_cfg_flags_t |
| 1230 | fib_path_route_flags_to_cfg_flags (const fib_route_path_t *rpath) |
| 1231 | { |
Neale Ranns | 450cd30 | 2016-11-09 17:49:42 +0000 | [diff] [blame] | 1232 | fib_path_cfg_flags_t cfg_flags = FIB_PATH_CFG_FLAG_NONE; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1233 | |
| 1234 | if (rpath->frp_flags & FIB_ROUTE_PATH_RESOLVE_VIA_HOST) |
| 1235 | cfg_flags |= FIB_PATH_CFG_FLAG_RESOLVE_HOST; |
| 1236 | if (rpath->frp_flags & FIB_ROUTE_PATH_RESOLVE_VIA_ATTACHED) |
| 1237 | cfg_flags |= FIB_PATH_CFG_FLAG_RESOLVE_ATTACHED; |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 1238 | if (rpath->frp_flags & FIB_ROUTE_PATH_LOCAL) |
| 1239 | cfg_flags |= FIB_PATH_CFG_FLAG_LOCAL; |
Neale Ranns | 4b919a5 | 2017-03-11 05:55:21 -0800 | [diff] [blame] | 1240 | if (rpath->frp_flags & FIB_ROUTE_PATH_ATTACHED) |
| 1241 | cfg_flags |= FIB_PATH_CFG_FLAG_ATTACHED; |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1242 | if (rpath->frp_flags & FIB_ROUTE_PATH_INTF_RX) |
| 1243 | cfg_flags |= FIB_PATH_CFG_FLAG_INTF_RX; |
| 1244 | if (rpath->frp_flags & FIB_ROUTE_PATH_RPF_ID) |
| 1245 | cfg_flags |= FIB_PATH_CFG_FLAG_RPF_ID; |
| 1246 | if (rpath->frp_flags & FIB_ROUTE_PATH_EXCLUSIVE) |
| 1247 | cfg_flags |= FIB_PATH_CFG_FLAG_EXCLUSIVE; |
| 1248 | if (rpath->frp_flags & FIB_ROUTE_PATH_DROP) |
| 1249 | cfg_flags |= FIB_PATH_CFG_FLAG_DROP; |
Neale Ranns | 054c03a | 2017-10-13 05:15:07 -0700 | [diff] [blame] | 1250 | if (rpath->frp_flags & FIB_ROUTE_PATH_SOURCE_LOOKUP) |
| 1251 | cfg_flags |= FIB_PATH_CFG_FLAG_DEAG_SRC; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1252 | |
| 1253 | return (cfg_flags); |
| 1254 | } |
| 1255 | |
| 1256 | /* |
| 1257 | * fib_path_create |
| 1258 | * |
| 1259 | * Create and initialise a new path object. |
| 1260 | * return the index of the path. |
| 1261 | */ |
| 1262 | fib_node_index_t |
| 1263 | fib_path_create (fib_node_index_t pl_index, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1264 | const fib_route_path_t *rpath) |
| 1265 | { |
| 1266 | fib_path_t *path; |
| 1267 | |
| 1268 | pool_get(fib_path_pool, path); |
| 1269 | memset(path, 0, sizeof(*path)); |
| 1270 | |
| 1271 | fib_node_init(&path->fp_node, |
| 1272 | FIB_NODE_TYPE_PATH); |
| 1273 | |
| 1274 | dpo_reset(&path->fp_dpo); |
| 1275 | path->fp_pl_index = pl_index; |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1276 | path->fp_nh_proto = rpath->frp_proto; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1277 | path->fp_via_fib = FIB_NODE_INDEX_INVALID; |
| 1278 | path->fp_weight = rpath->frp_weight; |
Neale Ranns | 0bd36ea | 2016-11-16 11:47:44 +0000 | [diff] [blame] | 1279 | if (0 == path->fp_weight) |
| 1280 | { |
| 1281 | /* |
| 1282 | * a weight of 0 is a meaningless value. We could either reject it, and thus force |
| 1283 | * clients to always use 1, or we can accept it and fixup approrpiately. |
| 1284 | */ |
| 1285 | path->fp_weight = 1; |
| 1286 | } |
Neale Ranns | 57b5860 | 2017-07-15 07:37:25 -0700 | [diff] [blame] | 1287 | path->fp_preference = rpath->frp_preference; |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1288 | path->fp_cfg_flags = fib_path_route_flags_to_cfg_flags(rpath); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1289 | |
| 1290 | /* |
| 1291 | * deduce the path's tpye from the parementers and save what is needed. |
| 1292 | */ |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 1293 | if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_LOCAL) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1294 | { |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 1295 | path->fp_type = FIB_PATH_TYPE_RECEIVE; |
| 1296 | path->receive.fp_interface = rpath->frp_sw_if_index; |
| 1297 | path->receive.fp_addr = rpath->frp_addr; |
| 1298 | } |
Neale Ranns | 810086d | 2017-11-05 16:26:46 -0800 | [diff] [blame] | 1299 | else if (rpath->frp_flags & FIB_ROUTE_PATH_UDP_ENCAP) |
| 1300 | { |
| 1301 | path->fp_type = FIB_PATH_TYPE_UDP_ENCAP; |
| 1302 | path->udp_encap.fp_udp_encap_id = rpath->frp_udp_encap_id; |
| 1303 | } |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1304 | else if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_INTF_RX) |
| 1305 | { |
| 1306 | path->fp_type = FIB_PATH_TYPE_INTF_RX; |
| 1307 | path->intf_rx.fp_interface = rpath->frp_sw_if_index; |
| 1308 | } |
| 1309 | else if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_RPF_ID) |
| 1310 | { |
| 1311 | path->fp_type = FIB_PATH_TYPE_DEAG; |
| 1312 | path->deag.fp_tbl_id = rpath->frp_fib_index; |
| 1313 | path->deag.fp_rpf_id = rpath->frp_rpf_id; |
| 1314 | } |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 1315 | else if (rpath->frp_flags & FIB_ROUTE_PATH_BIER_FMASK) |
| 1316 | { |
| 1317 | path->fp_type = FIB_PATH_TYPE_BIER_FMASK; |
| 1318 | path->bier_fmask.fp_nh = rpath->frp_addr; |
| 1319 | path->bier_fmask.fp_bier_fib = rpath->frp_bier_fib_index; |
| 1320 | } |
| 1321 | else if (rpath->frp_flags & FIB_ROUTE_PATH_BIER_IMP) |
| 1322 | { |
| 1323 | path->fp_type = FIB_PATH_TYPE_BIER_IMP; |
| 1324 | path->bier_imp.fp_bier_imp = rpath->frp_bier_imp; |
| 1325 | } |
| 1326 | else if (rpath->frp_flags & FIB_ROUTE_PATH_BIER_TABLE) |
| 1327 | { |
| 1328 | path->fp_type = FIB_PATH_TYPE_BIER_TABLE; |
| 1329 | path->bier_table.fp_bier_tbl = rpath->frp_bier_tbl; |
| 1330 | } |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 1331 | else if (~0 != rpath->frp_sw_if_index) |
| 1332 | { |
| 1333 | if (ip46_address_is_zero(&rpath->frp_addr)) |
| 1334 | { |
| 1335 | path->fp_type = FIB_PATH_TYPE_ATTACHED; |
| 1336 | path->attached.fp_interface = rpath->frp_sw_if_index; |
| 1337 | } |
| 1338 | else |
| 1339 | { |
| 1340 | path->fp_type = FIB_PATH_TYPE_ATTACHED_NEXT_HOP; |
| 1341 | path->attached_next_hop.fp_interface = rpath->frp_sw_if_index; |
| 1342 | path->attached_next_hop.fp_nh = rpath->frp_addr; |
| 1343 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1344 | } |
| 1345 | else |
| 1346 | { |
| 1347 | if (ip46_address_is_zero(&rpath->frp_addr)) |
| 1348 | { |
| 1349 | if (~0 == rpath->frp_fib_index) |
| 1350 | { |
| 1351 | path->fp_type = FIB_PATH_TYPE_SPECIAL; |
| 1352 | } |
| 1353 | else |
| 1354 | { |
| 1355 | path->fp_type = FIB_PATH_TYPE_DEAG; |
| 1356 | path->deag.fp_tbl_id = rpath->frp_fib_index; |
| 1357 | } |
| 1358 | } |
| 1359 | else |
| 1360 | { |
| 1361 | path->fp_type = FIB_PATH_TYPE_RECURSIVE; |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 1362 | if (DPO_PROTO_MPLS == path->fp_nh_proto) |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 1363 | { |
| 1364 | path->recursive.fp_nh.fp_local_label = rpath->frp_local_label; |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1365 | path->recursive.fp_nh.fp_eos = rpath->frp_eos; |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 1366 | } |
| 1367 | else |
| 1368 | { |
| 1369 | path->recursive.fp_nh.fp_ip = rpath->frp_addr; |
| 1370 | } |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 1371 | path->recursive.fp_tbl_id = rpath->frp_fib_index; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1372 | } |
| 1373 | } |
| 1374 | |
| 1375 | FIB_PATH_DBG(path, "create"); |
| 1376 | |
| 1377 | return (fib_path_get_index(path)); |
| 1378 | } |
| 1379 | |
| 1380 | /* |
| 1381 | * fib_path_create_special |
| 1382 | * |
| 1383 | * Create and initialise a new path object. |
| 1384 | * return the index of the path. |
| 1385 | */ |
| 1386 | fib_node_index_t |
| 1387 | fib_path_create_special (fib_node_index_t pl_index, |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 1388 | dpo_proto_t nh_proto, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1389 | fib_path_cfg_flags_t flags, |
| 1390 | const dpo_id_t *dpo) |
| 1391 | { |
| 1392 | fib_path_t *path; |
| 1393 | |
| 1394 | pool_get(fib_path_pool, path); |
| 1395 | memset(path, 0, sizeof(*path)); |
| 1396 | |
| 1397 | fib_node_init(&path->fp_node, |
| 1398 | FIB_NODE_TYPE_PATH); |
| 1399 | dpo_reset(&path->fp_dpo); |
| 1400 | |
| 1401 | path->fp_pl_index = pl_index; |
| 1402 | path->fp_weight = 1; |
Neale Ranns | 57b5860 | 2017-07-15 07:37:25 -0700 | [diff] [blame] | 1403 | path->fp_preference = 0; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1404 | path->fp_nh_proto = nh_proto; |
| 1405 | path->fp_via_fib = FIB_NODE_INDEX_INVALID; |
| 1406 | path->fp_cfg_flags = flags; |
| 1407 | |
| 1408 | if (FIB_PATH_CFG_FLAG_DROP & flags) |
| 1409 | { |
| 1410 | path->fp_type = FIB_PATH_TYPE_SPECIAL; |
| 1411 | } |
| 1412 | else if (FIB_PATH_CFG_FLAG_LOCAL & flags) |
| 1413 | { |
| 1414 | path->fp_type = FIB_PATH_TYPE_RECEIVE; |
| 1415 | path->attached.fp_interface = FIB_NODE_INDEX_INVALID; |
| 1416 | } |
| 1417 | else |
| 1418 | { |
| 1419 | path->fp_type = FIB_PATH_TYPE_EXCLUSIVE; |
| 1420 | ASSERT(NULL != dpo); |
| 1421 | dpo_copy(&path->exclusive.fp_ex_dpo, dpo); |
| 1422 | } |
| 1423 | |
| 1424 | return (fib_path_get_index(path)); |
| 1425 | } |
| 1426 | |
| 1427 | /* |
| 1428 | * fib_path_copy |
| 1429 | * |
| 1430 | * Copy a path. return index of new path. |
| 1431 | */ |
| 1432 | fib_node_index_t |
| 1433 | fib_path_copy (fib_node_index_t path_index, |
| 1434 | fib_node_index_t path_list_index) |
| 1435 | { |
| 1436 | fib_path_t *path, *orig_path; |
| 1437 | |
| 1438 | pool_get(fib_path_pool, path); |
| 1439 | |
| 1440 | orig_path = fib_path_get(path_index); |
| 1441 | ASSERT(NULL != orig_path); |
| 1442 | |
| 1443 | memcpy(path, orig_path, sizeof(*path)); |
| 1444 | |
| 1445 | FIB_PATH_DBG(path, "create-copy:%d", path_index); |
| 1446 | |
| 1447 | /* |
| 1448 | * reset the dynamic section |
| 1449 | */ |
| 1450 | fib_node_init(&path->fp_node, FIB_NODE_TYPE_PATH); |
| 1451 | path->fp_oper_flags = FIB_PATH_OPER_FLAG_NONE; |
| 1452 | path->fp_pl_index = path_list_index; |
| 1453 | path->fp_via_fib = FIB_NODE_INDEX_INVALID; |
| 1454 | memset(&path->fp_dpo, 0, sizeof(path->fp_dpo)); |
| 1455 | dpo_reset(&path->fp_dpo); |
| 1456 | |
| 1457 | return (fib_path_get_index(path)); |
| 1458 | } |
| 1459 | |
| 1460 | /* |
| 1461 | * fib_path_destroy |
| 1462 | * |
| 1463 | * destroy a path that is no longer required |
| 1464 | */ |
| 1465 | void |
| 1466 | fib_path_destroy (fib_node_index_t path_index) |
| 1467 | { |
| 1468 | fib_path_t *path; |
| 1469 | |
| 1470 | path = fib_path_get(path_index); |
| 1471 | |
| 1472 | ASSERT(NULL != path); |
| 1473 | FIB_PATH_DBG(path, "destroy"); |
| 1474 | |
| 1475 | fib_path_unresolve(path); |
| 1476 | |
| 1477 | fib_node_deinit(&path->fp_node); |
| 1478 | pool_put(fib_path_pool, path); |
| 1479 | } |
| 1480 | |
| 1481 | /* |
| 1482 | * fib_path_destroy |
| 1483 | * |
| 1484 | * destroy a path that is no longer required |
| 1485 | */ |
| 1486 | uword |
| 1487 | fib_path_hash (fib_node_index_t path_index) |
| 1488 | { |
| 1489 | fib_path_t *path; |
| 1490 | |
| 1491 | path = fib_path_get(path_index); |
| 1492 | |
| 1493 | return (hash_memory(STRUCT_MARK_PTR(path, path_hash_start), |
| 1494 | (STRUCT_OFFSET_OF(fib_path_t, path_hash_end) - |
| 1495 | STRUCT_OFFSET_OF(fib_path_t, path_hash_start)), |
| 1496 | 0)); |
| 1497 | } |
| 1498 | |
| 1499 | /* |
| 1500 | * fib_path_cmp_i |
| 1501 | * |
| 1502 | * Compare two paths for equivalence. |
| 1503 | */ |
| 1504 | static int |
| 1505 | fib_path_cmp_i (const fib_path_t *path1, |
| 1506 | const fib_path_t *path2) |
| 1507 | { |
| 1508 | int res; |
| 1509 | |
| 1510 | res = 1; |
| 1511 | |
| 1512 | /* |
| 1513 | * paths of different types and protocol are not equal. |
Neale Ranns | 57b5860 | 2017-07-15 07:37:25 -0700 | [diff] [blame] | 1514 | * different weights and/or preference only are the same path. |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1515 | */ |
| 1516 | if (path1->fp_type != path2->fp_type) |
| 1517 | { |
| 1518 | res = (path1->fp_type - path2->fp_type); |
| 1519 | } |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 1520 | else if (path1->fp_nh_proto != path2->fp_nh_proto) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1521 | { |
| 1522 | res = (path1->fp_nh_proto - path2->fp_nh_proto); |
| 1523 | } |
| 1524 | else |
| 1525 | { |
| 1526 | /* |
| 1527 | * both paths are of the same type. |
| 1528 | * consider each type and its attributes in turn. |
| 1529 | */ |
| 1530 | switch (path1->fp_type) |
| 1531 | { |
| 1532 | case FIB_PATH_TYPE_ATTACHED_NEXT_HOP: |
| 1533 | res = ip46_address_cmp(&path1->attached_next_hop.fp_nh, |
| 1534 | &path2->attached_next_hop.fp_nh); |
| 1535 | if (0 == res) { |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1536 | res = (path1->attached_next_hop.fp_interface - |
| 1537 | path2->attached_next_hop.fp_interface); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1538 | } |
| 1539 | break; |
| 1540 | case FIB_PATH_TYPE_ATTACHED: |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1541 | res = (path1->attached.fp_interface - |
| 1542 | path2->attached.fp_interface); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1543 | break; |
| 1544 | case FIB_PATH_TYPE_RECURSIVE: |
| 1545 | res = ip46_address_cmp(&path1->recursive.fp_nh, |
| 1546 | &path2->recursive.fp_nh); |
| 1547 | |
| 1548 | if (0 == res) |
| 1549 | { |
| 1550 | res = (path1->recursive.fp_tbl_id - path2->recursive.fp_tbl_id); |
| 1551 | } |
| 1552 | break; |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 1553 | case FIB_PATH_TYPE_BIER_FMASK: |
| 1554 | res = ip46_address_cmp(&path1->bier_fmask.fp_nh, |
| 1555 | &path2->bier_fmask.fp_nh); |
| 1556 | |
| 1557 | if (0 == res) |
| 1558 | { |
| 1559 | res = (path1->bier_fmask.fp_bier_fib - |
| 1560 | path2->bier_fmask.fp_bier_fib); |
| 1561 | } |
| 1562 | break; |
| 1563 | case FIB_PATH_TYPE_BIER_IMP: |
| 1564 | res = (path1->bier_imp.fp_bier_imp - |
| 1565 | path2->bier_imp.fp_bier_imp); |
| 1566 | break; |
| 1567 | case FIB_PATH_TYPE_BIER_TABLE: |
| 1568 | res = bier_table_id_cmp(&path1->bier_table.fp_bier_tbl, |
| 1569 | &path2->bier_table.fp_bier_tbl); |
| 1570 | break; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1571 | case FIB_PATH_TYPE_DEAG: |
| 1572 | res = (path1->deag.fp_tbl_id - path2->deag.fp_tbl_id); |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1573 | if (0 == res) |
| 1574 | { |
| 1575 | res = (path1->deag.fp_rpf_id - path2->deag.fp_rpf_id); |
| 1576 | } |
| 1577 | break; |
| 1578 | case FIB_PATH_TYPE_INTF_RX: |
| 1579 | res = (path1->intf_rx.fp_interface - path2->intf_rx.fp_interface); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1580 | break; |
Neale Ranns | 810086d | 2017-11-05 16:26:46 -0800 | [diff] [blame] | 1581 | case FIB_PATH_TYPE_UDP_ENCAP: |
| 1582 | res = (path1->udp_encap.fp_udp_encap_id - path2->udp_encap.fp_udp_encap_id); |
| 1583 | break; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1584 | case FIB_PATH_TYPE_SPECIAL: |
| 1585 | case FIB_PATH_TYPE_RECEIVE: |
| 1586 | case FIB_PATH_TYPE_EXCLUSIVE: |
| 1587 | res = 0; |
| 1588 | break; |
| 1589 | } |
| 1590 | } |
| 1591 | return (res); |
| 1592 | } |
| 1593 | |
| 1594 | /* |
| 1595 | * fib_path_cmp_for_sort |
| 1596 | * |
| 1597 | * Compare two paths for equivalence. Used during path sorting. |
| 1598 | * As usual 0 means equal. |
| 1599 | */ |
| 1600 | int |
| 1601 | fib_path_cmp_for_sort (void * v1, |
| 1602 | void * v2) |
| 1603 | { |
| 1604 | fib_node_index_t *pi1 = v1, *pi2 = v2; |
| 1605 | fib_path_t *path1, *path2; |
| 1606 | |
| 1607 | path1 = fib_path_get(*pi1); |
| 1608 | path2 = fib_path_get(*pi2); |
| 1609 | |
Neale Ranns | 57b5860 | 2017-07-15 07:37:25 -0700 | [diff] [blame] | 1610 | /* |
| 1611 | * when sorting paths we want the highest preference paths |
| 1612 | * first, so that the choices set built is in prefernce order |
| 1613 | */ |
| 1614 | if (path1->fp_preference != path2->fp_preference) |
| 1615 | { |
| 1616 | return (path1->fp_preference - path2->fp_preference); |
| 1617 | } |
| 1618 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1619 | return (fib_path_cmp_i(path1, path2)); |
| 1620 | } |
| 1621 | |
| 1622 | /* |
| 1623 | * fib_path_cmp |
| 1624 | * |
| 1625 | * Compare two paths for equivalence. |
| 1626 | */ |
| 1627 | int |
| 1628 | fib_path_cmp (fib_node_index_t pi1, |
| 1629 | fib_node_index_t pi2) |
| 1630 | { |
| 1631 | fib_path_t *path1, *path2; |
| 1632 | |
| 1633 | path1 = fib_path_get(pi1); |
| 1634 | path2 = fib_path_get(pi2); |
| 1635 | |
| 1636 | return (fib_path_cmp_i(path1, path2)); |
| 1637 | } |
| 1638 | |
| 1639 | int |
| 1640 | fib_path_cmp_w_route_path (fib_node_index_t path_index, |
| 1641 | const fib_route_path_t *rpath) |
| 1642 | { |
| 1643 | fib_path_t *path; |
| 1644 | int res; |
| 1645 | |
| 1646 | path = fib_path_get(path_index); |
| 1647 | |
| 1648 | res = 1; |
| 1649 | |
| 1650 | if (path->fp_weight != rpath->frp_weight) |
| 1651 | { |
| 1652 | res = (path->fp_weight - rpath->frp_weight); |
| 1653 | } |
| 1654 | else |
| 1655 | { |
| 1656 | /* |
| 1657 | * both paths are of the same type. |
| 1658 | * consider each type and its attributes in turn. |
| 1659 | */ |
| 1660 | switch (path->fp_type) |
| 1661 | { |
| 1662 | case FIB_PATH_TYPE_ATTACHED_NEXT_HOP: |
| 1663 | res = ip46_address_cmp(&path->attached_next_hop.fp_nh, |
| 1664 | &rpath->frp_addr); |
| 1665 | if (0 == res) |
| 1666 | { |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1667 | res = (path->attached_next_hop.fp_interface - |
| 1668 | rpath->frp_sw_if_index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1669 | } |
| 1670 | break; |
| 1671 | case FIB_PATH_TYPE_ATTACHED: |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1672 | res = (path->attached.fp_interface - rpath->frp_sw_if_index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1673 | break; |
| 1674 | case FIB_PATH_TYPE_RECURSIVE: |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 1675 | if (DPO_PROTO_MPLS == path->fp_nh_proto) |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 1676 | { |
| 1677 | res = path->recursive.fp_nh.fp_local_label - rpath->frp_local_label; |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1678 | |
| 1679 | if (res == 0) |
| 1680 | { |
| 1681 | res = path->recursive.fp_nh.fp_eos - rpath->frp_eos; |
| 1682 | } |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 1683 | } |
| 1684 | else |
| 1685 | { |
| 1686 | res = ip46_address_cmp(&path->recursive.fp_nh.fp_ip, |
| 1687 | &rpath->frp_addr); |
| 1688 | } |
| 1689 | |
| 1690 | if (0 == res) |
| 1691 | { |
| 1692 | res = (path->recursive.fp_tbl_id - rpath->frp_fib_index); |
| 1693 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1694 | break; |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 1695 | case FIB_PATH_TYPE_BIER_FMASK: |
| 1696 | res = ip46_address_cmp(&path->bier_fmask.fp_nh, |
| 1697 | &rpath->frp_addr); |
| 1698 | |
| 1699 | if (0 == res) |
| 1700 | { |
| 1701 | res = (path->bier_fmask.fp_bier_fib - rpath->frp_bier_fib_index); |
| 1702 | } |
| 1703 | break; |
| 1704 | case FIB_PATH_TYPE_BIER_IMP: |
| 1705 | res = (path->bier_imp.fp_bier_imp - rpath->frp_bier_imp); |
| 1706 | break; |
| 1707 | case FIB_PATH_TYPE_BIER_TABLE: |
| 1708 | res = bier_table_id_cmp(&path->bier_table.fp_bier_tbl, |
| 1709 | &rpath->frp_bier_tbl); |
| 1710 | break; |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1711 | case FIB_PATH_TYPE_INTF_RX: |
| 1712 | res = (path->intf_rx.fp_interface - rpath->frp_sw_if_index); |
| 1713 | break; |
Neale Ranns | 810086d | 2017-11-05 16:26:46 -0800 | [diff] [blame] | 1714 | case FIB_PATH_TYPE_UDP_ENCAP: |
| 1715 | res = (path->udp_encap.fp_udp_encap_id - rpath->frp_udp_encap_id); |
| 1716 | break; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1717 | case FIB_PATH_TYPE_DEAG: |
| 1718 | res = (path->deag.fp_tbl_id - rpath->frp_fib_index); |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1719 | if (0 == res) |
| 1720 | { |
| 1721 | res = (path->deag.fp_rpf_id - rpath->frp_rpf_id); |
| 1722 | } |
| 1723 | break; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1724 | case FIB_PATH_TYPE_SPECIAL: |
| 1725 | case FIB_PATH_TYPE_RECEIVE: |
| 1726 | case FIB_PATH_TYPE_EXCLUSIVE: |
| 1727 | res = 0; |
| 1728 | break; |
| 1729 | } |
| 1730 | } |
| 1731 | return (res); |
| 1732 | } |
| 1733 | |
| 1734 | /* |
| 1735 | * fib_path_recursive_loop_detect |
| 1736 | * |
| 1737 | * A forward walk of the FIB object graph to detect for a cycle/loop. This |
| 1738 | * walk is initiated when an entry is linking to a new path list or from an old. |
| 1739 | * The entry vector passed contains all the FIB entrys that are children of this |
| 1740 | * path (it is all the entries encountered on the walk so far). If this vector |
| 1741 | * contains the entry this path resolve via, then a loop is about to form. |
| 1742 | * The loop must be allowed to form, since we need the dependencies in place |
| 1743 | * so that we can track when the loop breaks. |
| 1744 | * However, we MUST not produce a loop in the forwarding graph (else packets |
| 1745 | * would loop around the switch path until the loop breaks), so we mark recursive |
| 1746 | * paths as looped so that they do not contribute forwarding information. |
| 1747 | * By marking the path as looped, an etry such as; |
| 1748 | * X/Y |
| 1749 | * via a.a.a.a (looped) |
| 1750 | * via b.b.b.b (not looped) |
| 1751 | * can still forward using the info provided by b.b.b.b only |
| 1752 | */ |
| 1753 | int |
| 1754 | fib_path_recursive_loop_detect (fib_node_index_t path_index, |
| 1755 | fib_node_index_t **entry_indicies) |
| 1756 | { |
| 1757 | fib_path_t *path; |
| 1758 | |
| 1759 | path = fib_path_get(path_index); |
| 1760 | |
| 1761 | /* |
| 1762 | * the forced drop path is never looped, cos it is never resolved. |
| 1763 | */ |
| 1764 | if (fib_path_is_permanent_drop(path)) |
| 1765 | { |
| 1766 | return (0); |
| 1767 | } |
| 1768 | |
| 1769 | switch (path->fp_type) |
| 1770 | { |
| 1771 | case FIB_PATH_TYPE_RECURSIVE: |
| 1772 | { |
| 1773 | fib_node_index_t *entry_index, *entries; |
| 1774 | int looped = 0; |
| 1775 | entries = *entry_indicies; |
| 1776 | |
| 1777 | vec_foreach(entry_index, entries) { |
| 1778 | if (*entry_index == path->fp_via_fib) |
| 1779 | { |
| 1780 | /* |
| 1781 | * the entry that is about to link to this path-list (or |
| 1782 | * one of this path-list's children) is the same entry that |
| 1783 | * this recursive path resolves through. this is a cycle. |
| 1784 | * abort the walk. |
| 1785 | */ |
| 1786 | looped = 1; |
| 1787 | break; |
| 1788 | } |
| 1789 | } |
| 1790 | |
| 1791 | if (looped) |
| 1792 | { |
| 1793 | FIB_PATH_DBG(path, "recursive loop formed"); |
| 1794 | path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RECURSIVE_LOOP; |
| 1795 | |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 1796 | dpo_copy(&path->fp_dpo, drop_dpo_get(path->fp_nh_proto)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1797 | } |
| 1798 | else |
| 1799 | { |
| 1800 | /* |
| 1801 | * no loop here yet. keep forward walking the graph. |
| 1802 | */ |
| 1803 | if (fib_entry_recursive_loop_detect(path->fp_via_fib, entry_indicies)) |
| 1804 | { |
| 1805 | FIB_PATH_DBG(path, "recursive loop formed"); |
| 1806 | path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RECURSIVE_LOOP; |
| 1807 | } |
| 1808 | else |
| 1809 | { |
| 1810 | FIB_PATH_DBG(path, "recursive loop cleared"); |
| 1811 | path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RECURSIVE_LOOP; |
| 1812 | } |
| 1813 | } |
| 1814 | break; |
| 1815 | } |
| 1816 | case FIB_PATH_TYPE_ATTACHED_NEXT_HOP: |
| 1817 | case FIB_PATH_TYPE_ATTACHED: |
| 1818 | case FIB_PATH_TYPE_SPECIAL: |
| 1819 | case FIB_PATH_TYPE_DEAG: |
| 1820 | case FIB_PATH_TYPE_RECEIVE: |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1821 | case FIB_PATH_TYPE_INTF_RX: |
Neale Ranns | 810086d | 2017-11-05 16:26:46 -0800 | [diff] [blame] | 1822 | case FIB_PATH_TYPE_UDP_ENCAP: |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1823 | case FIB_PATH_TYPE_EXCLUSIVE: |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 1824 | case FIB_PATH_TYPE_BIER_FMASK: |
| 1825 | case FIB_PATH_TYPE_BIER_TABLE: |
| 1826 | case FIB_PATH_TYPE_BIER_IMP: |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1827 | /* |
| 1828 | * these path types cannot be part of a loop, since they are the leaves |
| 1829 | * of the graph. |
| 1830 | */ |
| 1831 | break; |
| 1832 | } |
| 1833 | |
| 1834 | return (fib_path_is_looped(path_index)); |
| 1835 | } |
| 1836 | |
| 1837 | int |
| 1838 | fib_path_resolve (fib_node_index_t path_index) |
| 1839 | { |
| 1840 | fib_path_t *path; |
| 1841 | |
| 1842 | path = fib_path_get(path_index); |
| 1843 | |
| 1844 | /* |
| 1845 | * hope for the best. |
| 1846 | */ |
| 1847 | path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RESOLVED; |
| 1848 | |
| 1849 | /* |
| 1850 | * the forced drop path resolves via the drop adj |
| 1851 | */ |
| 1852 | if (fib_path_is_permanent_drop(path)) |
| 1853 | { |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 1854 | dpo_copy(&path->fp_dpo, drop_dpo_get(path->fp_nh_proto)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1855 | path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED; |
| 1856 | return (fib_path_is_resolved(path_index)); |
| 1857 | } |
| 1858 | |
| 1859 | switch (path->fp_type) |
| 1860 | { |
| 1861 | case FIB_PATH_TYPE_ATTACHED_NEXT_HOP: |
| 1862 | fib_path_attached_next_hop_set(path); |
| 1863 | break; |
| 1864 | case FIB_PATH_TYPE_ATTACHED: |
Neale Ranns | 6f63115 | 2017-10-03 08:20:21 -0700 | [diff] [blame] | 1865 | if (DPO_PROTO_ETHERNET == path->fp_nh_proto) |
| 1866 | { |
| 1867 | l2_bridge_dpo_add_or_lock(path->attached.fp_interface, |
| 1868 | &path->fp_dpo); |
| 1869 | } |
| 1870 | else |
| 1871 | { |
| 1872 | /* |
| 1873 | * path->attached.fp_interface |
| 1874 | */ |
| 1875 | if (!vnet_sw_interface_is_admin_up(vnet_get_main(), |
| 1876 | path->attached.fp_interface)) |
| 1877 | { |
| 1878 | path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED; |
| 1879 | } |
| 1880 | dpo_set(&path->fp_dpo, |
| 1881 | DPO_ADJACENCY, |
| 1882 | path->fp_nh_proto, |
| 1883 | fib_path_attached_get_adj(path, |
| 1884 | dpo_proto_to_link(path->fp_nh_proto))); |
Neale Ranns | 8c4611b | 2017-05-23 03:43:47 -0700 | [diff] [blame] | 1885 | |
Neale Ranns | 6f63115 | 2017-10-03 08:20:21 -0700 | [diff] [blame] | 1886 | /* |
| 1887 | * become a child of the adjacency so we receive updates |
| 1888 | * when the interface state changes |
| 1889 | */ |
| 1890 | path->fp_sibling = adj_child_add(path->fp_dpo.dpoi_index, |
| 1891 | FIB_NODE_TYPE_PATH, |
| 1892 | fib_path_get_index(path)); |
| 1893 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1894 | break; |
| 1895 | case FIB_PATH_TYPE_RECURSIVE: |
| 1896 | { |
| 1897 | /* |
| 1898 | * Create a RR source entry in the table for the address |
| 1899 | * that this path recurses through. |
| 1900 | * This resolve action is recursive, hence we may create |
| 1901 | * more paths in the process. more creates mean maybe realloc |
| 1902 | * of this path. |
| 1903 | */ |
| 1904 | fib_node_index_t fei; |
| 1905 | fib_prefix_t pfx; |
| 1906 | |
| 1907 | ASSERT(FIB_NODE_INDEX_INVALID == path->fp_via_fib); |
| 1908 | |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 1909 | if (DPO_PROTO_MPLS == path->fp_nh_proto) |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 1910 | { |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1911 | fib_prefix_from_mpls_label(path->recursive.fp_nh.fp_local_label, |
| 1912 | path->recursive.fp_nh.fp_eos, |
| 1913 | &pfx); |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 1914 | } |
| 1915 | else |
| 1916 | { |
| 1917 | fib_prefix_from_ip46_addr(&path->recursive.fp_nh.fp_ip, &pfx); |
| 1918 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1919 | |
| 1920 | fei = fib_table_entry_special_add(path->recursive.fp_tbl_id, |
| 1921 | &pfx, |
| 1922 | FIB_SOURCE_RR, |
Neale Ranns | a055830 | 2017-04-13 00:44:52 -0700 | [diff] [blame] | 1923 | FIB_ENTRY_FLAG_NONE); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1924 | |
| 1925 | path = fib_path_get(path_index); |
| 1926 | path->fp_via_fib = fei; |
| 1927 | |
| 1928 | /* |
| 1929 | * become a dependent child of the entry so the path is |
| 1930 | * informed when the forwarding for the entry changes. |
| 1931 | */ |
| 1932 | path->fp_sibling = fib_entry_child_add(path->fp_via_fib, |
| 1933 | FIB_NODE_TYPE_PATH, |
| 1934 | fib_path_get_index(path)); |
| 1935 | |
| 1936 | /* |
| 1937 | * create and configure the IP DPO |
| 1938 | */ |
| 1939 | fib_path_recursive_adj_update( |
| 1940 | path, |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1941 | fib_path_to_chain_type(path), |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1942 | &path->fp_dpo); |
| 1943 | |
| 1944 | break; |
| 1945 | } |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 1946 | case FIB_PATH_TYPE_BIER_FMASK: |
| 1947 | { |
| 1948 | /* |
| 1949 | * Find the BIER f-mask to link to |
| 1950 | */ |
| 1951 | bier_fmask_id_t fmid = { |
| 1952 | .bfmi_nh = path->bier_fmask.fp_nh, |
| 1953 | .bfmi_hdr_type = BIER_HDR_O_MPLS, |
| 1954 | }; |
| 1955 | |
| 1956 | ASSERT(FIB_NODE_INDEX_INVALID == path->fp_via_bier_fmask); |
| 1957 | |
| 1958 | path->fp_via_bier_fmask = bier_fmask_db_find(path->bier_fmask.fp_bier_fib, |
| 1959 | &fmid); |
| 1960 | |
| 1961 | /* |
| 1962 | * become a dependent child of the entry so the path is |
| 1963 | * informed when the forwarding for the entry changes. |
| 1964 | */ |
| 1965 | path->fp_sibling = bier_fmask_child_add(path->fp_via_bier_fmask, |
| 1966 | FIB_NODE_TYPE_PATH, |
| 1967 | fib_path_get_index(path)); |
| 1968 | |
| 1969 | fib_path_bier_fmask_update(path, &path->fp_dpo); |
| 1970 | |
| 1971 | break; |
| 1972 | } |
| 1973 | case FIB_PATH_TYPE_BIER_IMP: |
| 1974 | bier_imp_lock(path->bier_imp.fp_bier_imp); |
| 1975 | bier_imp_contribute_forwarding(path->bier_imp.fp_bier_imp, |
| 1976 | DPO_PROTO_IP4, |
| 1977 | &path->fp_dpo); |
| 1978 | break; |
| 1979 | case FIB_PATH_TYPE_BIER_TABLE: |
| 1980 | { |
| 1981 | /* |
| 1982 | * Find/create the BIER table to link to |
| 1983 | */ |
| 1984 | ASSERT(FIB_NODE_INDEX_INVALID == path->fp_via_bier_tbl); |
| 1985 | |
| 1986 | path->fp_via_bier_tbl = |
| 1987 | bier_table_ecmp_create_and_lock(&path->bier_table.fp_bier_tbl); |
| 1988 | |
| 1989 | bier_table_contribute_forwarding(path->fp_via_bier_tbl, |
| 1990 | &path->fp_dpo); |
| 1991 | break; |
| 1992 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1993 | case FIB_PATH_TYPE_SPECIAL: |
| 1994 | /* |
| 1995 | * Resolve via the drop |
| 1996 | */ |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 1997 | dpo_copy(&path->fp_dpo, drop_dpo_get(path->fp_nh_proto)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1998 | break; |
| 1999 | case FIB_PATH_TYPE_DEAG: |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 2000 | { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2001 | /* |
| 2002 | * Resolve via a lookup DPO. |
| 2003 | * FIXME. control plane should add routes with a table ID |
| 2004 | */ |
Neale Ranns | 054c03a | 2017-10-13 05:15:07 -0700 | [diff] [blame] | 2005 | lookup_input_t input; |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 2006 | lookup_cast_t cast; |
Neale Ranns | 054c03a | 2017-10-13 05:15:07 -0700 | [diff] [blame] | 2007 | |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 2008 | cast = (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_RPF_ID ? |
| 2009 | LOOKUP_MULTICAST : |
| 2010 | LOOKUP_UNICAST); |
Neale Ranns | 054c03a | 2017-10-13 05:15:07 -0700 | [diff] [blame] | 2011 | input = (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_DEAG_SRC ? |
| 2012 | LOOKUP_INPUT_SRC_ADDR : |
| 2013 | LOOKUP_INPUT_DST_ADDR); |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 2014 | |
| 2015 | lookup_dpo_add_or_lock_w_fib_index(path->deag.fp_tbl_id, |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 2016 | path->fp_nh_proto, |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 2017 | cast, |
Neale Ranns | 054c03a | 2017-10-13 05:15:07 -0700 | [diff] [blame] | 2018 | input, |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 2019 | LOOKUP_TABLE_FROM_CONFIG, |
| 2020 | &path->fp_dpo); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2021 | break; |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 2022 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2023 | case FIB_PATH_TYPE_RECEIVE: |
| 2024 | /* |
| 2025 | * Resolve via a receive DPO. |
| 2026 | */ |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 2027 | receive_dpo_add_or_lock(path->fp_nh_proto, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2028 | path->receive.fp_interface, |
| 2029 | &path->receive.fp_addr, |
| 2030 | &path->fp_dpo); |
| 2031 | break; |
Neale Ranns | 810086d | 2017-11-05 16:26:46 -0800 | [diff] [blame] | 2032 | case FIB_PATH_TYPE_UDP_ENCAP: |
| 2033 | udp_encap_lock(path->udp_encap.fp_udp_encap_id); |
| 2034 | udp_encap_contribute_forwarding(path->udp_encap.fp_udp_encap_id, |
| 2035 | path->fp_nh_proto, |
| 2036 | &path->fp_dpo); |
| 2037 | break; |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 2038 | case FIB_PATH_TYPE_INTF_RX: { |
| 2039 | /* |
| 2040 | * Resolve via a receive DPO. |
| 2041 | */ |
Neale Ranns | 43161a8 | 2017-08-12 02:12:00 -0700 | [diff] [blame] | 2042 | interface_rx_dpo_add_or_lock(path->fp_nh_proto, |
| 2043 | path->intf_rx.fp_interface, |
| 2044 | &path->fp_dpo); |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 2045 | break; |
| 2046 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2047 | case FIB_PATH_TYPE_EXCLUSIVE: |
| 2048 | /* |
| 2049 | * Resolve via the user provided DPO |
| 2050 | */ |
| 2051 | dpo_copy(&path->fp_dpo, &path->exclusive.fp_ex_dpo); |
| 2052 | break; |
| 2053 | } |
| 2054 | |
| 2055 | return (fib_path_is_resolved(path_index)); |
| 2056 | } |
| 2057 | |
| 2058 | u32 |
| 2059 | fib_path_get_resolving_interface (fib_node_index_t path_index) |
| 2060 | { |
| 2061 | fib_path_t *path; |
| 2062 | |
| 2063 | path = fib_path_get(path_index); |
| 2064 | |
| 2065 | switch (path->fp_type) |
| 2066 | { |
| 2067 | case FIB_PATH_TYPE_ATTACHED_NEXT_HOP: |
| 2068 | return (path->attached_next_hop.fp_interface); |
| 2069 | case FIB_PATH_TYPE_ATTACHED: |
| 2070 | return (path->attached.fp_interface); |
| 2071 | case FIB_PATH_TYPE_RECEIVE: |
| 2072 | return (path->receive.fp_interface); |
| 2073 | case FIB_PATH_TYPE_RECURSIVE: |
Neale Ranns | 08b1648 | 2017-05-13 05:52:58 -0700 | [diff] [blame] | 2074 | if (fib_path_is_resolved(path_index)) |
| 2075 | { |
| 2076 | return (fib_entry_get_resolving_interface(path->fp_via_fib)); |
| 2077 | } |
| 2078 | break; |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 2079 | case FIB_PATH_TYPE_INTF_RX: |
Neale Ranns | 810086d | 2017-11-05 16:26:46 -0800 | [diff] [blame] | 2080 | case FIB_PATH_TYPE_UDP_ENCAP: |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2081 | case FIB_PATH_TYPE_SPECIAL: |
| 2082 | case FIB_PATH_TYPE_DEAG: |
| 2083 | case FIB_PATH_TYPE_EXCLUSIVE: |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 2084 | case FIB_PATH_TYPE_BIER_FMASK: |
| 2085 | case FIB_PATH_TYPE_BIER_TABLE: |
| 2086 | case FIB_PATH_TYPE_BIER_IMP: |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2087 | break; |
| 2088 | } |
| 2089 | return (~0); |
| 2090 | } |
| 2091 | |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 2092 | index_t |
| 2093 | fib_path_get_resolving_index (fib_node_index_t path_index) |
| 2094 | { |
| 2095 | fib_path_t *path; |
| 2096 | |
| 2097 | path = fib_path_get(path_index); |
| 2098 | |
| 2099 | switch (path->fp_type) |
| 2100 | { |
| 2101 | case FIB_PATH_TYPE_ATTACHED_NEXT_HOP: |
| 2102 | case FIB_PATH_TYPE_ATTACHED: |
| 2103 | case FIB_PATH_TYPE_RECEIVE: |
| 2104 | case FIB_PATH_TYPE_INTF_RX: |
| 2105 | case FIB_PATH_TYPE_SPECIAL: |
| 2106 | case FIB_PATH_TYPE_DEAG: |
| 2107 | case FIB_PATH_TYPE_EXCLUSIVE: |
| 2108 | break; |
| 2109 | case FIB_PATH_TYPE_UDP_ENCAP: |
| 2110 | return (path->udp_encap.fp_udp_encap_id); |
| 2111 | case FIB_PATH_TYPE_RECURSIVE: |
| 2112 | return (path->fp_via_fib); |
| 2113 | case FIB_PATH_TYPE_BIER_FMASK: |
| 2114 | return (path->fp_via_bier_fmask); |
| 2115 | case FIB_PATH_TYPE_BIER_TABLE: |
| 2116 | return (path->fp_via_bier_tbl); |
| 2117 | case FIB_PATH_TYPE_BIER_IMP: |
| 2118 | return (path->bier_imp.fp_bier_imp); |
| 2119 | } |
| 2120 | return (~0); |
| 2121 | } |
| 2122 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2123 | adj_index_t |
| 2124 | fib_path_get_adj (fib_node_index_t path_index) |
| 2125 | { |
| 2126 | fib_path_t *path; |
| 2127 | |
| 2128 | path = fib_path_get(path_index); |
| 2129 | |
| 2130 | ASSERT(dpo_is_adj(&path->fp_dpo)); |
| 2131 | if (dpo_is_adj(&path->fp_dpo)) |
| 2132 | { |
| 2133 | return (path->fp_dpo.dpoi_index); |
| 2134 | } |
| 2135 | return (ADJ_INDEX_INVALID); |
| 2136 | } |
| 2137 | |
Neale Ranns | 57b5860 | 2017-07-15 07:37:25 -0700 | [diff] [blame] | 2138 | u16 |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2139 | fib_path_get_weight (fib_node_index_t path_index) |
| 2140 | { |
| 2141 | fib_path_t *path; |
| 2142 | |
| 2143 | path = fib_path_get(path_index); |
| 2144 | |
| 2145 | ASSERT(path); |
| 2146 | |
| 2147 | return (path->fp_weight); |
| 2148 | } |
| 2149 | |
Neale Ranns | 57b5860 | 2017-07-15 07:37:25 -0700 | [diff] [blame] | 2150 | u16 |
| 2151 | fib_path_get_preference (fib_node_index_t path_index) |
| 2152 | { |
| 2153 | fib_path_t *path; |
| 2154 | |
| 2155 | path = fib_path_get(path_index); |
| 2156 | |
| 2157 | ASSERT(path); |
| 2158 | |
| 2159 | return (path->fp_preference); |
| 2160 | } |
| 2161 | |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 2162 | u32 |
| 2163 | fib_path_get_rpf_id (fib_node_index_t path_index) |
| 2164 | { |
| 2165 | fib_path_t *path; |
| 2166 | |
| 2167 | path = fib_path_get(path_index); |
| 2168 | |
| 2169 | ASSERT(path); |
| 2170 | |
| 2171 | if (FIB_PATH_CFG_FLAG_RPF_ID & path->fp_cfg_flags) |
| 2172 | { |
| 2173 | return (path->deag.fp_rpf_id); |
| 2174 | } |
| 2175 | |
| 2176 | return (~0); |
| 2177 | } |
| 2178 | |
Neale Ranns | 3ee4404 | 2016-10-03 13:05:48 +0100 | [diff] [blame] | 2179 | /** |
| 2180 | * @brief Contribute the path's adjacency to the list passed. |
| 2181 | * By calling this function over all paths, recursively, a child |
| 2182 | * can construct its full set of forwarding adjacencies, and hence its |
| 2183 | * uRPF list. |
| 2184 | */ |
| 2185 | void |
| 2186 | fib_path_contribute_urpf (fib_node_index_t path_index, |
| 2187 | index_t urpf) |
| 2188 | { |
| 2189 | fib_path_t *path; |
| 2190 | |
Neale Ranns | 3ee4404 | 2016-10-03 13:05:48 +0100 | [diff] [blame] | 2191 | path = fib_path_get(path_index); |
| 2192 | |
Neale Ranns | 88fc83e | 2017-04-05 08:11:14 -0700 | [diff] [blame] | 2193 | /* |
| 2194 | * resolved and unresolved paths contribute to the RPF list. |
| 2195 | */ |
Neale Ranns | 3ee4404 | 2016-10-03 13:05:48 +0100 | [diff] [blame] | 2196 | switch (path->fp_type) |
| 2197 | { |
| 2198 | case FIB_PATH_TYPE_ATTACHED_NEXT_HOP: |
| 2199 | fib_urpf_list_append(urpf, path->attached_next_hop.fp_interface); |
| 2200 | break; |
| 2201 | |
| 2202 | case FIB_PATH_TYPE_ATTACHED: |
| 2203 | fib_urpf_list_append(urpf, path->attached.fp_interface); |
| 2204 | break; |
| 2205 | |
| 2206 | case FIB_PATH_TYPE_RECURSIVE: |
Neale Ranns | 08b1648 | 2017-05-13 05:52:58 -0700 | [diff] [blame] | 2207 | if (FIB_NODE_INDEX_INVALID != path->fp_via_fib && |
| 2208 | !fib_path_is_looped(path_index)) |
Neale Ranns | 88fc83e | 2017-04-05 08:11:14 -0700 | [diff] [blame] | 2209 | { |
| 2210 | /* |
| 2211 | * there's unresolved due to constraints, and there's unresolved |
Neale Ranns | 08b1648 | 2017-05-13 05:52:58 -0700 | [diff] [blame] | 2212 | * due to ain't got no via. can't do nowt w'out via. |
Neale Ranns | 88fc83e | 2017-04-05 08:11:14 -0700 | [diff] [blame] | 2213 | */ |
| 2214 | fib_entry_contribute_urpf(path->fp_via_fib, urpf); |
| 2215 | } |
Neale Ranns | 3ee4404 | 2016-10-03 13:05:48 +0100 | [diff] [blame] | 2216 | break; |
| 2217 | |
| 2218 | case FIB_PATH_TYPE_EXCLUSIVE: |
| 2219 | case FIB_PATH_TYPE_SPECIAL: |
Andrew Yourtchenko | 5f3fcb9 | 2017-10-25 05:50:37 -0700 | [diff] [blame] | 2220 | { |
| 2221 | /* |
Neale Ranns | 3ee4404 | 2016-10-03 13:05:48 +0100 | [diff] [blame] | 2222 | * these path types may link to an adj, if that's what |
| 2223 | * the clinet gave |
| 2224 | */ |
Andrew Yourtchenko | 5f3fcb9 | 2017-10-25 05:50:37 -0700 | [diff] [blame] | 2225 | u32 rpf_sw_if_index; |
| 2226 | |
| 2227 | rpf_sw_if_index = dpo_get_urpf(&path->fp_dpo); |
| 2228 | |
| 2229 | if (~0 != rpf_sw_if_index) |
Neale Ranns | 3ee4404 | 2016-10-03 13:05:48 +0100 | [diff] [blame] | 2230 | { |
Andrew Yourtchenko | 5f3fcb9 | 2017-10-25 05:50:37 -0700 | [diff] [blame] | 2231 | fib_urpf_list_append(urpf, rpf_sw_if_index); |
Neale Ranns | 3ee4404 | 2016-10-03 13:05:48 +0100 | [diff] [blame] | 2232 | } |
| 2233 | break; |
Andrew Yourtchenko | 5f3fcb9 | 2017-10-25 05:50:37 -0700 | [diff] [blame] | 2234 | } |
Neale Ranns | 3ee4404 | 2016-10-03 13:05:48 +0100 | [diff] [blame] | 2235 | case FIB_PATH_TYPE_DEAG: |
| 2236 | case FIB_PATH_TYPE_RECEIVE: |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 2237 | case FIB_PATH_TYPE_INTF_RX: |
Neale Ranns | 810086d | 2017-11-05 16:26:46 -0800 | [diff] [blame] | 2238 | case FIB_PATH_TYPE_UDP_ENCAP: |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 2239 | case FIB_PATH_TYPE_BIER_FMASK: |
| 2240 | case FIB_PATH_TYPE_BIER_TABLE: |
| 2241 | case FIB_PATH_TYPE_BIER_IMP: |
Neale Ranns | 3ee4404 | 2016-10-03 13:05:48 +0100 | [diff] [blame] | 2242 | /* |
| 2243 | * these path types don't link to an adj |
| 2244 | */ |
| 2245 | break; |
| 2246 | } |
| 2247 | } |
| 2248 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2249 | void |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 2250 | fib_path_stack_mpls_disp (fib_node_index_t path_index, |
| 2251 | dpo_proto_t payload_proto, |
| 2252 | dpo_id_t *dpo) |
| 2253 | { |
| 2254 | fib_path_t *path; |
| 2255 | |
| 2256 | path = fib_path_get(path_index); |
| 2257 | |
| 2258 | ASSERT(path); |
| 2259 | |
| 2260 | switch (path->fp_type) |
| 2261 | { |
| 2262 | case FIB_PATH_TYPE_DEAG: |
| 2263 | { |
| 2264 | dpo_id_t tmp = DPO_INVALID; |
| 2265 | |
| 2266 | dpo_copy(&tmp, dpo); |
| 2267 | dpo_set(dpo, |
| 2268 | DPO_MPLS_DISPOSITION, |
| 2269 | payload_proto, |
| 2270 | mpls_disp_dpo_create(payload_proto, |
| 2271 | path->deag.fp_rpf_id, |
| 2272 | &tmp)); |
| 2273 | dpo_reset(&tmp); |
| 2274 | break; |
Neale Ranns | 810086d | 2017-11-05 16:26:46 -0800 | [diff] [blame] | 2275 | } |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 2276 | case FIB_PATH_TYPE_RECEIVE: |
| 2277 | case FIB_PATH_TYPE_ATTACHED: |
| 2278 | case FIB_PATH_TYPE_ATTACHED_NEXT_HOP: |
| 2279 | case FIB_PATH_TYPE_RECURSIVE: |
| 2280 | case FIB_PATH_TYPE_INTF_RX: |
Neale Ranns | 810086d | 2017-11-05 16:26:46 -0800 | [diff] [blame] | 2281 | case FIB_PATH_TYPE_UDP_ENCAP: |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 2282 | case FIB_PATH_TYPE_EXCLUSIVE: |
| 2283 | case FIB_PATH_TYPE_SPECIAL: |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 2284 | case FIB_PATH_TYPE_BIER_FMASK: |
| 2285 | case FIB_PATH_TYPE_BIER_TABLE: |
| 2286 | case FIB_PATH_TYPE_BIER_IMP: |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 2287 | break; |
| 2288 | } |
| 2289 | } |
| 2290 | |
| 2291 | void |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2292 | fib_path_contribute_forwarding (fib_node_index_t path_index, |
| 2293 | fib_forward_chain_type_t fct, |
| 2294 | dpo_id_t *dpo) |
| 2295 | { |
| 2296 | fib_path_t *path; |
| 2297 | |
| 2298 | path = fib_path_get(path_index); |
| 2299 | |
| 2300 | ASSERT(path); |
| 2301 | ASSERT(FIB_FORW_CHAIN_TYPE_MPLS_EOS != fct); |
| 2302 | |
| 2303 | FIB_PATH_DBG(path, "contribute"); |
| 2304 | |
| 2305 | /* |
| 2306 | * The DPO stored in the path was created when the path was resolved. |
| 2307 | * This then represents the path's 'native' protocol; IP. |
| 2308 | * For all others will need to go find something else. |
| 2309 | */ |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 2310 | if (fib_path_to_chain_type(path) == fct) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2311 | { |
| 2312 | dpo_copy(dpo, &path->fp_dpo); |
| 2313 | } |
Neale Ranns | 5e575b1 | 2016-10-03 09:40:25 +0100 | [diff] [blame] | 2314 | else |
| 2315 | { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2316 | switch (path->fp_type) |
| 2317 | { |
| 2318 | case FIB_PATH_TYPE_ATTACHED_NEXT_HOP: |
| 2319 | switch (fct) |
| 2320 | { |
| 2321 | case FIB_FORW_CHAIN_TYPE_UNICAST_IP4: |
| 2322 | case FIB_FORW_CHAIN_TYPE_UNICAST_IP6: |
| 2323 | case FIB_FORW_CHAIN_TYPE_MPLS_EOS: |
| 2324 | case FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS: |
Neale Ranns | 5e575b1 | 2016-10-03 09:40:25 +0100 | [diff] [blame] | 2325 | case FIB_FORW_CHAIN_TYPE_ETHERNET: |
Florin Coras | ce1b4c7 | 2017-01-26 14:25:34 -0800 | [diff] [blame] | 2326 | case FIB_FORW_CHAIN_TYPE_NSH: |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2327 | { |
| 2328 | adj_index_t ai; |
| 2329 | |
| 2330 | /* |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 2331 | * get a appropriate link type adj. |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2332 | */ |
| 2333 | ai = fib_path_attached_next_hop_get_adj( |
| 2334 | path, |
| 2335 | fib_forw_chain_type_to_link_type(fct)); |
| 2336 | dpo_set(dpo, DPO_ADJACENCY, |
| 2337 | fib_forw_chain_type_to_dpo_proto(fct), ai); |
| 2338 | adj_unlock(ai); |
| 2339 | |
| 2340 | break; |
| 2341 | } |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 2342 | case FIB_FORW_CHAIN_TYPE_MCAST_IP4: |
| 2343 | case FIB_FORW_CHAIN_TYPE_MCAST_IP6: |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 2344 | case FIB_FORW_CHAIN_TYPE_BIER: |
| 2345 | break; |
| 2346 | } |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 2347 | break; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2348 | case FIB_PATH_TYPE_RECURSIVE: |
| 2349 | switch (fct) |
| 2350 | { |
| 2351 | case FIB_FORW_CHAIN_TYPE_MPLS_EOS: |
| 2352 | case FIB_FORW_CHAIN_TYPE_UNICAST_IP4: |
| 2353 | case FIB_FORW_CHAIN_TYPE_UNICAST_IP6: |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2354 | case FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS: |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 2355 | case FIB_FORW_CHAIN_TYPE_MCAST_IP4: |
| 2356 | case FIB_FORW_CHAIN_TYPE_MCAST_IP6: |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 2357 | case FIB_FORW_CHAIN_TYPE_BIER: |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 2358 | fib_path_recursive_adj_update(path, fct, dpo); |
| 2359 | break; |
Neale Ranns | 5e575b1 | 2016-10-03 09:40:25 +0100 | [diff] [blame] | 2360 | case FIB_FORW_CHAIN_TYPE_ETHERNET: |
Florin Coras | ce1b4c7 | 2017-01-26 14:25:34 -0800 | [diff] [blame] | 2361 | case FIB_FORW_CHAIN_TYPE_NSH: |
Neale Ranns | 5e575b1 | 2016-10-03 09:40:25 +0100 | [diff] [blame] | 2362 | ASSERT(0); |
| 2363 | break; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2364 | } |
| 2365 | break; |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 2366 | case FIB_PATH_TYPE_BIER_TABLE: |
| 2367 | switch (fct) |
| 2368 | { |
| 2369 | case FIB_FORW_CHAIN_TYPE_BIER: |
| 2370 | bier_table_contribute_forwarding(path->fp_via_bier_tbl, dpo); |
| 2371 | break; |
| 2372 | case FIB_FORW_CHAIN_TYPE_MPLS_EOS: |
| 2373 | case FIB_FORW_CHAIN_TYPE_UNICAST_IP4: |
| 2374 | case FIB_FORW_CHAIN_TYPE_UNICAST_IP6: |
| 2375 | case FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS: |
| 2376 | case FIB_FORW_CHAIN_TYPE_MCAST_IP4: |
| 2377 | case FIB_FORW_CHAIN_TYPE_MCAST_IP6: |
| 2378 | case FIB_FORW_CHAIN_TYPE_ETHERNET: |
| 2379 | case FIB_FORW_CHAIN_TYPE_NSH: |
| 2380 | ASSERT(0); |
| 2381 | break; |
| 2382 | } |
| 2383 | break; |
| 2384 | case FIB_PATH_TYPE_BIER_FMASK: |
| 2385 | switch (fct) |
| 2386 | { |
| 2387 | case FIB_FORW_CHAIN_TYPE_BIER: |
| 2388 | fib_path_bier_fmask_update(path, dpo); |
| 2389 | break; |
| 2390 | case FIB_FORW_CHAIN_TYPE_MPLS_EOS: |
| 2391 | case FIB_FORW_CHAIN_TYPE_UNICAST_IP4: |
| 2392 | case FIB_FORW_CHAIN_TYPE_UNICAST_IP6: |
| 2393 | case FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS: |
| 2394 | case FIB_FORW_CHAIN_TYPE_MCAST_IP4: |
| 2395 | case FIB_FORW_CHAIN_TYPE_MCAST_IP6: |
| 2396 | case FIB_FORW_CHAIN_TYPE_ETHERNET: |
| 2397 | case FIB_FORW_CHAIN_TYPE_NSH: |
| 2398 | ASSERT(0); |
| 2399 | break; |
| 2400 | } |
| 2401 | break; |
| 2402 | case FIB_PATH_TYPE_BIER_IMP: |
| 2403 | bier_imp_contribute_forwarding(path->bier_imp.fp_bier_imp, |
| 2404 | fib_forw_chain_type_to_dpo_proto(fct), |
| 2405 | dpo); |
| 2406 | break; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2407 | case FIB_PATH_TYPE_DEAG: |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 2408 | switch (fct) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2409 | { |
| 2410 | case FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS: |
| 2411 | lookup_dpo_add_or_lock_w_table_id(MPLS_FIB_DEFAULT_TABLE_ID, |
| 2412 | DPO_PROTO_MPLS, |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 2413 | LOOKUP_UNICAST, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2414 | LOOKUP_INPUT_DST_ADDR, |
| 2415 | LOOKUP_TABLE_FROM_CONFIG, |
| 2416 | dpo); |
| 2417 | break; |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 2418 | case FIB_FORW_CHAIN_TYPE_MPLS_EOS: |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2419 | case FIB_FORW_CHAIN_TYPE_UNICAST_IP4: |
| 2420 | case FIB_FORW_CHAIN_TYPE_UNICAST_IP6: |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2421 | dpo_copy(dpo, &path->fp_dpo); |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 2422 | break; |
| 2423 | case FIB_FORW_CHAIN_TYPE_MCAST_IP4: |
| 2424 | case FIB_FORW_CHAIN_TYPE_MCAST_IP6: |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 2425 | case FIB_FORW_CHAIN_TYPE_BIER: |
| 2426 | break; |
Neale Ranns | 5e575b1 | 2016-10-03 09:40:25 +0100 | [diff] [blame] | 2427 | case FIB_FORW_CHAIN_TYPE_ETHERNET: |
Florin Coras | ce1b4c7 | 2017-01-26 14:25:34 -0800 | [diff] [blame] | 2428 | case FIB_FORW_CHAIN_TYPE_NSH: |
Neale Ranns | 5e575b1 | 2016-10-03 09:40:25 +0100 | [diff] [blame] | 2429 | ASSERT(0); |
| 2430 | break; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2431 | } |
| 2432 | break; |
| 2433 | case FIB_PATH_TYPE_EXCLUSIVE: |
| 2434 | dpo_copy(dpo, &path->exclusive.fp_ex_dpo); |
| 2435 | break; |
| 2436 | case FIB_PATH_TYPE_ATTACHED: |
Neale Ranns | 6f63115 | 2017-10-03 08:20:21 -0700 | [diff] [blame] | 2437 | if (DPO_PROTO_ETHERNET == path->fp_nh_proto) |
| 2438 | { |
| 2439 | dpo_copy(dpo, &path->fp_dpo); |
| 2440 | break; |
| 2441 | } |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 2442 | switch (fct) |
| 2443 | { |
| 2444 | case FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS: |
| 2445 | case FIB_FORW_CHAIN_TYPE_UNICAST_IP4: |
| 2446 | case FIB_FORW_CHAIN_TYPE_UNICAST_IP6: |
| 2447 | case FIB_FORW_CHAIN_TYPE_MPLS_EOS: |
| 2448 | case FIB_FORW_CHAIN_TYPE_ETHERNET: |
Florin Coras | ce1b4c7 | 2017-01-26 14:25:34 -0800 | [diff] [blame] | 2449 | case FIB_FORW_CHAIN_TYPE_NSH: |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 2450 | case FIB_FORW_CHAIN_TYPE_BIER: |
Neale Ranns | 8c4611b | 2017-05-23 03:43:47 -0700 | [diff] [blame] | 2451 | { |
| 2452 | adj_index_t ai; |
| 2453 | |
| 2454 | /* |
| 2455 | * get a appropriate link type adj. |
| 2456 | */ |
| 2457 | ai = fib_path_attached_get_adj( |
| 2458 | path, |
| 2459 | fib_forw_chain_type_to_link_type(fct)); |
| 2460 | dpo_set(dpo, DPO_ADJACENCY, |
| 2461 | fib_forw_chain_type_to_dpo_proto(fct), ai); |
| 2462 | adj_unlock(ai); |
| 2463 | break; |
| 2464 | } |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 2465 | case FIB_FORW_CHAIN_TYPE_MCAST_IP4: |
| 2466 | case FIB_FORW_CHAIN_TYPE_MCAST_IP6: |
| 2467 | { |
| 2468 | adj_index_t ai; |
| 2469 | |
| 2470 | /* |
| 2471 | * Create the adj needed for sending IP multicast traffic |
| 2472 | */ |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 2473 | ai = adj_mcast_add_or_lock(dpo_proto_to_fib(path->fp_nh_proto), |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 2474 | fib_forw_chain_type_to_link_type(fct), |
| 2475 | path->attached.fp_interface); |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 2476 | dpo_set(dpo, DPO_ADJACENCY, |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 2477 | fib_forw_chain_type_to_dpo_proto(fct), |
| 2478 | ai); |
| 2479 | adj_unlock(ai); |
| 2480 | } |
| 2481 | break; |
| 2482 | } |
| 2483 | break; |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 2484 | case FIB_PATH_TYPE_INTF_RX: |
| 2485 | /* |
| 2486 | * Create the adj needed for sending IP multicast traffic |
| 2487 | */ |
Neale Ranns | 43161a8 | 2017-08-12 02:12:00 -0700 | [diff] [blame] | 2488 | interface_rx_dpo_add_or_lock(fib_forw_chain_type_to_dpo_proto(fct), |
| 2489 | path->attached.fp_interface, |
| 2490 | dpo); |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 2491 | break; |
Neale Ranns | 810086d | 2017-11-05 16:26:46 -0800 | [diff] [blame] | 2492 | case FIB_PATH_TYPE_UDP_ENCAP: |
| 2493 | udp_encap_contribute_forwarding(path->udp_encap.fp_udp_encap_id, |
| 2494 | path->fp_nh_proto, |
| 2495 | dpo); |
| 2496 | break; |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 2497 | case FIB_PATH_TYPE_RECEIVE: |
| 2498 | case FIB_PATH_TYPE_SPECIAL: |
| 2499 | dpo_copy(dpo, &path->fp_dpo); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2500 | break; |
| 2501 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2502 | } |
| 2503 | } |
| 2504 | |
| 2505 | load_balance_path_t * |
| 2506 | fib_path_append_nh_for_multipath_hash (fib_node_index_t path_index, |
| 2507 | fib_forward_chain_type_t fct, |
| 2508 | load_balance_path_t *hash_key) |
| 2509 | { |
| 2510 | load_balance_path_t *mnh; |
| 2511 | fib_path_t *path; |
| 2512 | |
| 2513 | path = fib_path_get(path_index); |
| 2514 | |
| 2515 | ASSERT(path); |
| 2516 | |
| 2517 | if (fib_path_is_resolved(path_index)) |
| 2518 | { |
| 2519 | vec_add2(hash_key, mnh, 1); |
| 2520 | |
| 2521 | mnh->path_weight = path->fp_weight; |
| 2522 | mnh->path_index = path_index; |
Neale Ranns | 5e575b1 | 2016-10-03 09:40:25 +0100 | [diff] [blame] | 2523 | fib_path_contribute_forwarding(path_index, fct, &mnh->path_dpo); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2524 | } |
| 2525 | |
| 2526 | return (hash_key); |
| 2527 | } |
| 2528 | |
| 2529 | int |
Neale Ranns | f12a83f | 2017-04-18 09:09:40 -0700 | [diff] [blame] | 2530 | fib_path_is_recursive_constrained (fib_node_index_t path_index) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2531 | { |
| 2532 | fib_path_t *path; |
| 2533 | |
| 2534 | path = fib_path_get(path_index); |
| 2535 | |
Neale Ranns | f12a83f | 2017-04-18 09:09:40 -0700 | [diff] [blame] | 2536 | return ((FIB_PATH_TYPE_RECURSIVE == path->fp_type) && |
| 2537 | ((path->fp_cfg_flags & FIB_PATH_CFG_FLAG_RESOLVE_ATTACHED) || |
| 2538 | (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_RESOLVE_HOST))); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2539 | } |
| 2540 | |
| 2541 | int |
| 2542 | fib_path_is_exclusive (fib_node_index_t path_index) |
| 2543 | { |
| 2544 | fib_path_t *path; |
| 2545 | |
| 2546 | path = fib_path_get(path_index); |
| 2547 | |
| 2548 | return (FIB_PATH_TYPE_EXCLUSIVE == path->fp_type); |
| 2549 | } |
| 2550 | |
| 2551 | int |
| 2552 | fib_path_is_deag (fib_node_index_t path_index) |
| 2553 | { |
| 2554 | fib_path_t *path; |
| 2555 | |
| 2556 | path = fib_path_get(path_index); |
| 2557 | |
| 2558 | return (FIB_PATH_TYPE_DEAG == path->fp_type); |
| 2559 | } |
| 2560 | |
| 2561 | int |
| 2562 | fib_path_is_resolved (fib_node_index_t path_index) |
| 2563 | { |
| 2564 | fib_path_t *path; |
| 2565 | |
| 2566 | path = fib_path_get(path_index); |
| 2567 | |
| 2568 | return (dpo_id_is_valid(&path->fp_dpo) && |
| 2569 | (path->fp_oper_flags & FIB_PATH_OPER_FLAG_RESOLVED) && |
| 2570 | !fib_path_is_looped(path_index) && |
| 2571 | !fib_path_is_permanent_drop(path)); |
| 2572 | } |
| 2573 | |
| 2574 | int |
| 2575 | fib_path_is_looped (fib_node_index_t path_index) |
| 2576 | { |
| 2577 | fib_path_t *path; |
| 2578 | |
| 2579 | path = fib_path_get(path_index); |
| 2580 | |
| 2581 | return (path->fp_oper_flags & FIB_PATH_OPER_FLAG_RECURSIVE_LOOP); |
| 2582 | } |
| 2583 | |
Neale Ranns | 8142499 | 2017-05-18 03:03:22 -0700 | [diff] [blame] | 2584 | fib_path_list_walk_rc_t |
Steven | 01b0712 | 2016-11-02 10:40:09 -0700 | [diff] [blame] | 2585 | fib_path_encode (fib_node_index_t path_list_index, |
| 2586 | fib_node_index_t path_index, |
| 2587 | void *ctx) |
| 2588 | { |
| 2589 | fib_route_path_encode_t **api_rpaths = ctx; |
| 2590 | fib_route_path_encode_t *api_rpath; |
| 2591 | fib_path_t *path; |
| 2592 | |
| 2593 | path = fib_path_get(path_index); |
| 2594 | if (!path) |
Neale Ranns | 8142499 | 2017-05-18 03:03:22 -0700 | [diff] [blame] | 2595 | return (FIB_PATH_LIST_WALK_CONTINUE); |
Steven | 01b0712 | 2016-11-02 10:40:09 -0700 | [diff] [blame] | 2596 | vec_add2(*api_rpaths, api_rpath, 1); |
| 2597 | api_rpath->rpath.frp_weight = path->fp_weight; |
Neale Ranns | 57b5860 | 2017-07-15 07:37:25 -0700 | [diff] [blame] | 2598 | api_rpath->rpath.frp_preference = path->fp_preference; |
Steven | 01b0712 | 2016-11-02 10:40:09 -0700 | [diff] [blame] | 2599 | api_rpath->rpath.frp_proto = path->fp_nh_proto; |
| 2600 | api_rpath->rpath.frp_sw_if_index = ~0; |
| 2601 | api_rpath->dpo = path->exclusive.fp_ex_dpo; |
| 2602 | switch (path->fp_type) |
| 2603 | { |
| 2604 | case FIB_PATH_TYPE_RECEIVE: |
| 2605 | api_rpath->rpath.frp_addr = path->receive.fp_addr; |
| 2606 | api_rpath->rpath.frp_sw_if_index = path->receive.fp_interface; |
Florin Coras | 91d341c | 2017-07-29 11:50:31 -0700 | [diff] [blame] | 2607 | api_rpath->dpo = path->fp_dpo; |
Steven | 01b0712 | 2016-11-02 10:40:09 -0700 | [diff] [blame] | 2608 | break; |
| 2609 | case FIB_PATH_TYPE_ATTACHED: |
| 2610 | api_rpath->rpath.frp_sw_if_index = path->attached.fp_interface; |
Florin Coras | 91d341c | 2017-07-29 11:50:31 -0700 | [diff] [blame] | 2611 | api_rpath->dpo = path->fp_dpo; |
Steven | 01b0712 | 2016-11-02 10:40:09 -0700 | [diff] [blame] | 2612 | break; |
| 2613 | case FIB_PATH_TYPE_ATTACHED_NEXT_HOP: |
| 2614 | api_rpath->rpath.frp_sw_if_index = path->attached_next_hop.fp_interface; |
| 2615 | api_rpath->rpath.frp_addr = path->attached_next_hop.fp_nh; |
| 2616 | break; |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 2617 | case FIB_PATH_TYPE_BIER_FMASK: |
| 2618 | api_rpath->rpath.frp_fib_index = path->bier_fmask.fp_bier_fib; |
| 2619 | api_rpath->rpath.frp_addr = path->bier_fmask.fp_nh; |
| 2620 | break; |
Steven | 01b0712 | 2016-11-02 10:40:09 -0700 | [diff] [blame] | 2621 | case FIB_PATH_TYPE_SPECIAL: |
| 2622 | break; |
| 2623 | case FIB_PATH_TYPE_DEAG: |
Neale Ranns | 7b7ba57 | 2017-10-01 12:08:10 -0700 | [diff] [blame] | 2624 | api_rpath->rpath.frp_fib_index = path->deag.fp_tbl_id; |
| 2625 | api_rpath->dpo = path->fp_dpo; |
Steven | 01b0712 | 2016-11-02 10:40:09 -0700 | [diff] [blame] | 2626 | break; |
| 2627 | case FIB_PATH_TYPE_RECURSIVE: |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 2628 | api_rpath->rpath.frp_addr = path->recursive.fp_nh.fp_ip; |
Steven | 01b0712 | 2016-11-02 10:40:09 -0700 | [diff] [blame] | 2629 | break; |
| 2630 | default: |
| 2631 | break; |
| 2632 | } |
Neale Ranns | 8142499 | 2017-05-18 03:03:22 -0700 | [diff] [blame] | 2633 | return (FIB_PATH_LIST_WALK_CONTINUE); |
Steven | 01b0712 | 2016-11-02 10:40:09 -0700 | [diff] [blame] | 2634 | } |
| 2635 | |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 2636 | dpo_proto_t |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 2637 | fib_path_get_proto (fib_node_index_t path_index) |
| 2638 | { |
| 2639 | fib_path_t *path; |
| 2640 | |
| 2641 | path = fib_path_get(path_index); |
| 2642 | |
| 2643 | return (path->fp_nh_proto); |
| 2644 | } |
| 2645 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2646 | void |
| 2647 | fib_path_module_init (void) |
| 2648 | { |
| 2649 | fib_node_register_type (FIB_NODE_TYPE_PATH, &fib_path_vft); |
| 2650 | } |
| 2651 | |
| 2652 | static clib_error_t * |
| 2653 | show_fib_path_command (vlib_main_t * vm, |
| 2654 | unformat_input_t * input, |
| 2655 | vlib_cli_command_t * cmd) |
| 2656 | { |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 2657 | fib_node_index_t pi; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2658 | fib_path_t *path; |
| 2659 | |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 2660 | if (unformat (input, "%d", &pi)) |
| 2661 | { |
| 2662 | /* |
| 2663 | * show one in detail |
| 2664 | */ |
| 2665 | if (!pool_is_free_index(fib_path_pool, pi)) |
| 2666 | { |
| 2667 | path = fib_path_get(pi); |
| 2668 | u8 *s = fib_path_format(pi, NULL); |
| 2669 | s = format(s, "children:"); |
| 2670 | s = fib_node_children_format(path->fp_node.fn_children, s); |
| 2671 | vlib_cli_output (vm, "%s", s); |
| 2672 | vec_free(s); |
| 2673 | } |
| 2674 | else |
| 2675 | { |
| 2676 | vlib_cli_output (vm, "path %d invalid", pi); |
| 2677 | } |
| 2678 | } |
| 2679 | else |
| 2680 | { |
| 2681 | vlib_cli_output (vm, "FIB Paths"); |
| 2682 | pool_foreach(path, fib_path_pool, |
| 2683 | ({ |
| 2684 | vlib_cli_output (vm, "%U", format_fib_path, path); |
| 2685 | })); |
| 2686 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2687 | |
| 2688 | return (NULL); |
| 2689 | } |
| 2690 | |
| 2691 | VLIB_CLI_COMMAND (show_fib_path, static) = { |
| 2692 | .path = "show fib paths", |
| 2693 | .function = show_fib_path_command, |
| 2694 | .short_help = "show fib paths", |
| 2695 | }; |