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 | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 24 | #include <vnet/dpo/interface_dpo.h> |
| 25 | #include <vnet/dpo/mpls_disposition.h> |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 26 | |
| 27 | #include <vnet/adj/adj.h> |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 28 | #include <vnet/adj/adj_mcast.h> |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 29 | |
Neale Ranns | 3ee4404 | 2016-10-03 13:05:48 +0100 | [diff] [blame] | 30 | #include <vnet/fib/fib_path.h> |
| 31 | #include <vnet/fib/fib_node.h> |
| 32 | #include <vnet/fib/fib_table.h> |
| 33 | #include <vnet/fib/fib_entry.h> |
| 34 | #include <vnet/fib/fib_path_list.h> |
| 35 | #include <vnet/fib/fib_internal.h> |
| 36 | #include <vnet/fib/fib_urpf_list.h> |
Neale Ranns | a3af337 | 2017-03-28 03:49:52 -0700 | [diff] [blame] | 37 | #include <vnet/fib/mpls_fib.h> |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 38 | |
| 39 | /** |
| 40 | * Enurmeration of path types |
| 41 | */ |
| 42 | typedef enum fib_path_type_t_ { |
| 43 | /** |
| 44 | * Marker. Add new types after this one. |
| 45 | */ |
| 46 | FIB_PATH_TYPE_FIRST = 0, |
| 47 | /** |
| 48 | * Attached-nexthop. An interface and a nexthop are known. |
| 49 | */ |
| 50 | FIB_PATH_TYPE_ATTACHED_NEXT_HOP = FIB_PATH_TYPE_FIRST, |
| 51 | /** |
| 52 | * attached. Only the interface is known. |
| 53 | */ |
| 54 | FIB_PATH_TYPE_ATTACHED, |
| 55 | /** |
| 56 | * recursive. Only the next-hop is known. |
| 57 | */ |
| 58 | FIB_PATH_TYPE_RECURSIVE, |
| 59 | /** |
| 60 | * special. nothing is known. so we drop. |
| 61 | */ |
| 62 | FIB_PATH_TYPE_SPECIAL, |
| 63 | /** |
| 64 | * exclusive. user provided adj. |
| 65 | */ |
| 66 | FIB_PATH_TYPE_EXCLUSIVE, |
| 67 | /** |
| 68 | * deag. Link to a lookup adj in the next table |
| 69 | */ |
| 70 | FIB_PATH_TYPE_DEAG, |
| 71 | /** |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 72 | * interface receive. |
| 73 | */ |
| 74 | FIB_PATH_TYPE_INTF_RX, |
| 75 | /** |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 76 | * receive. it's for-us. |
| 77 | */ |
| 78 | FIB_PATH_TYPE_RECEIVE, |
| 79 | /** |
| 80 | * Marker. Add new types before this one, then update it. |
| 81 | */ |
| 82 | FIB_PATH_TYPE_LAST = FIB_PATH_TYPE_RECEIVE, |
| 83 | } __attribute__ ((packed)) fib_path_type_t; |
| 84 | |
| 85 | /** |
| 86 | * The maximum number of path_types |
| 87 | */ |
| 88 | #define FIB_PATH_TYPE_MAX (FIB_PATH_TYPE_LAST + 1) |
| 89 | |
| 90 | #define FIB_PATH_TYPES { \ |
| 91 | [FIB_PATH_TYPE_ATTACHED_NEXT_HOP] = "attached-nexthop", \ |
| 92 | [FIB_PATH_TYPE_ATTACHED] = "attached", \ |
| 93 | [FIB_PATH_TYPE_RECURSIVE] = "recursive", \ |
| 94 | [FIB_PATH_TYPE_SPECIAL] = "special", \ |
| 95 | [FIB_PATH_TYPE_EXCLUSIVE] = "exclusive", \ |
| 96 | [FIB_PATH_TYPE_DEAG] = "deag", \ |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 97 | [FIB_PATH_TYPE_INTF_RX] = "intf-rx", \ |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 98 | [FIB_PATH_TYPE_RECEIVE] = "receive", \ |
| 99 | } |
| 100 | |
| 101 | #define FOR_EACH_FIB_PATH_TYPE(_item) \ |
| 102 | for (_item = FIB_PATH_TYPE_FIRST; _item <= FIB_PATH_TYPE_LAST; _item++) |
| 103 | |
| 104 | /** |
| 105 | * Enurmeration of path operational (i.e. derived) attributes |
| 106 | */ |
| 107 | typedef enum fib_path_oper_attribute_t_ { |
| 108 | /** |
| 109 | * Marker. Add new types after this one. |
| 110 | */ |
| 111 | FIB_PATH_OPER_ATTRIBUTE_FIRST = 0, |
| 112 | /** |
| 113 | * The path forms part of a recursive loop. |
| 114 | */ |
| 115 | FIB_PATH_OPER_ATTRIBUTE_RECURSIVE_LOOP = FIB_PATH_OPER_ATTRIBUTE_FIRST, |
| 116 | /** |
| 117 | * The path is resolved |
| 118 | */ |
| 119 | FIB_PATH_OPER_ATTRIBUTE_RESOLVED, |
| 120 | /** |
Neale Ranns | 4b919a5 | 2017-03-11 05:55:21 -0800 | [diff] [blame] | 121 | * The path is attached, despite what the next-hop may say. |
| 122 | */ |
| 123 | FIB_PATH_OPER_ATTRIBUTE_ATTACHED, |
| 124 | /** |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 125 | * The path has become a permanent drop. |
| 126 | */ |
| 127 | FIB_PATH_OPER_ATTRIBUTE_DROP, |
| 128 | /** |
| 129 | * Marker. Add new types before this one, then update it. |
| 130 | */ |
| 131 | FIB_PATH_OPER_ATTRIBUTE_LAST = FIB_PATH_OPER_ATTRIBUTE_DROP, |
| 132 | } __attribute__ ((packed)) fib_path_oper_attribute_t; |
| 133 | |
| 134 | /** |
| 135 | * The maximum number of path operational attributes |
| 136 | */ |
| 137 | #define FIB_PATH_OPER_ATTRIBUTE_MAX (FIB_PATH_OPER_ATTRIBUTE_LAST + 1) |
| 138 | |
| 139 | #define FIB_PATH_OPER_ATTRIBUTES { \ |
| 140 | [FIB_PATH_OPER_ATTRIBUTE_RECURSIVE_LOOP] = "recursive-loop", \ |
| 141 | [FIB_PATH_OPER_ATTRIBUTE_RESOLVED] = "resolved", \ |
| 142 | [FIB_PATH_OPER_ATTRIBUTE_DROP] = "drop", \ |
| 143 | } |
| 144 | |
| 145 | #define FOR_EACH_FIB_PATH_OPER_ATTRIBUTE(_item) \ |
| 146 | for (_item = FIB_PATH_OPER_ATTRIBUTE_FIRST; \ |
| 147 | _item <= FIB_PATH_OPER_ATTRIBUTE_LAST; \ |
| 148 | _item++) |
| 149 | |
| 150 | /** |
| 151 | * Path flags from the attributes |
| 152 | */ |
| 153 | typedef enum fib_path_oper_flags_t_ { |
| 154 | FIB_PATH_OPER_FLAG_NONE = 0, |
| 155 | FIB_PATH_OPER_FLAG_RECURSIVE_LOOP = (1 << FIB_PATH_OPER_ATTRIBUTE_RECURSIVE_LOOP), |
| 156 | FIB_PATH_OPER_FLAG_DROP = (1 << FIB_PATH_OPER_ATTRIBUTE_DROP), |
| 157 | FIB_PATH_OPER_FLAG_RESOLVED = (1 << FIB_PATH_OPER_ATTRIBUTE_RESOLVED), |
Neale Ranns | 4b919a5 | 2017-03-11 05:55:21 -0800 | [diff] [blame] | 158 | FIB_PATH_OPER_FLAG_ATTACHED = (1 << FIB_PATH_OPER_ATTRIBUTE_ATTACHED), |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 159 | } __attribute__ ((packed)) fib_path_oper_flags_t; |
| 160 | |
| 161 | /** |
| 162 | * A FIB path |
| 163 | */ |
| 164 | typedef struct fib_path_t_ { |
| 165 | /** |
| 166 | * A path is a node in the FIB graph. |
| 167 | */ |
| 168 | fib_node_t fp_node; |
| 169 | |
| 170 | /** |
| 171 | * The index of the path-list to which this path belongs |
| 172 | */ |
| 173 | u32 fp_pl_index; |
| 174 | |
| 175 | /** |
| 176 | * This marks the start of the memory area used to hash |
| 177 | * the path |
| 178 | */ |
| 179 | STRUCT_MARK(path_hash_start); |
| 180 | |
| 181 | /** |
| 182 | * Configuration Flags |
| 183 | */ |
| 184 | fib_path_cfg_flags_t fp_cfg_flags; |
| 185 | |
| 186 | /** |
| 187 | * The type of the path. This is the selector for the union |
| 188 | */ |
| 189 | fib_path_type_t fp_type; |
| 190 | |
| 191 | /** |
| 192 | * The protocol of the next-hop, i.e. the address family of the |
| 193 | * next-hop's address. We can't derive this from the address itself |
| 194 | * since the address can be all zeros |
| 195 | */ |
| 196 | fib_protocol_t fp_nh_proto; |
| 197 | |
| 198 | /** |
| 199 | * UCMP [unnormalised] weigt |
| 200 | */ |
| 201 | u32 fp_weight; |
| 202 | |
| 203 | /** |
| 204 | * per-type union of the data required to resolve the path |
| 205 | */ |
| 206 | union { |
| 207 | struct { |
| 208 | /** |
| 209 | * The next-hop |
| 210 | */ |
| 211 | ip46_address_t fp_nh; |
| 212 | /** |
| 213 | * The interface |
| 214 | */ |
| 215 | u32 fp_interface; |
| 216 | } attached_next_hop; |
| 217 | struct { |
| 218 | /** |
| 219 | * The interface |
| 220 | */ |
| 221 | u32 fp_interface; |
| 222 | } attached; |
| 223 | struct { |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 224 | union |
| 225 | { |
| 226 | /** |
| 227 | * The next-hop |
| 228 | */ |
| 229 | ip46_address_t fp_ip; |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 230 | struct { |
| 231 | /** |
| 232 | * The local label to resolve through. |
| 233 | */ |
| 234 | mpls_label_t fp_local_label; |
| 235 | /** |
| 236 | * The EOS bit of the resolving label |
| 237 | */ |
| 238 | mpls_eos_bit_t fp_eos; |
| 239 | }; |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 240 | } fp_nh; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 241 | /** |
| 242 | * The FIB table index in which to find the next-hop. |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 243 | */ |
| 244 | fib_node_index_t fp_tbl_id; |
| 245 | } recursive; |
| 246 | struct { |
| 247 | /** |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 248 | * The FIB index in which to perfom the next lookup |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 249 | */ |
| 250 | fib_node_index_t fp_tbl_id; |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 251 | /** |
| 252 | * The RPF-ID to tag the packets with |
| 253 | */ |
| 254 | fib_rpf_id_t fp_rpf_id; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 255 | } deag; |
| 256 | struct { |
| 257 | } special; |
| 258 | struct { |
| 259 | /** |
| 260 | * The user provided 'exclusive' DPO |
| 261 | */ |
| 262 | dpo_id_t fp_ex_dpo; |
| 263 | } exclusive; |
| 264 | struct { |
| 265 | /** |
| 266 | * The interface on which the local address is configured |
| 267 | */ |
| 268 | u32 fp_interface; |
| 269 | /** |
| 270 | * The next-hop |
| 271 | */ |
| 272 | ip46_address_t fp_addr; |
| 273 | } receive; |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 274 | struct { |
| 275 | /** |
| 276 | * The interface on which the packets will be input. |
| 277 | */ |
| 278 | u32 fp_interface; |
| 279 | } intf_rx; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 280 | }; |
| 281 | STRUCT_MARK(path_hash_end); |
| 282 | |
| 283 | /** |
| 284 | * Memebers in this last section represent information that is |
| 285 | * dervied during resolution. It should not be copied to new paths |
| 286 | * nor compared. |
| 287 | */ |
| 288 | |
| 289 | /** |
| 290 | * Operational Flags |
| 291 | */ |
| 292 | fib_path_oper_flags_t fp_oper_flags; |
| 293 | |
| 294 | /** |
| 295 | * the resolving via fib. not part of the union, since it it not part |
| 296 | * of the path's hash. |
| 297 | */ |
| 298 | fib_node_index_t fp_via_fib; |
| 299 | |
| 300 | /** |
| 301 | * The Data-path objects through which this path resolves for IP. |
| 302 | */ |
| 303 | dpo_id_t fp_dpo; |
| 304 | |
| 305 | /** |
| 306 | * the index of this path in the parent's child list. |
| 307 | */ |
| 308 | u32 fp_sibling; |
| 309 | } fib_path_t; |
| 310 | |
| 311 | /* |
| 312 | * Array of strings/names for the path types and attributes |
| 313 | */ |
| 314 | static const char *fib_path_type_names[] = FIB_PATH_TYPES; |
| 315 | static const char *fib_path_oper_attribute_names[] = FIB_PATH_OPER_ATTRIBUTES; |
| 316 | static const char *fib_path_cfg_attribute_names[] = FIB_PATH_CFG_ATTRIBUTES; |
| 317 | |
| 318 | /* |
| 319 | * The memory pool from which we allocate all the paths |
| 320 | */ |
| 321 | static fib_path_t *fib_path_pool; |
| 322 | |
| 323 | /* |
| 324 | * Debug macro |
| 325 | */ |
| 326 | #ifdef FIB_DEBUG |
| 327 | #define FIB_PATH_DBG(_p, _fmt, _args...) \ |
| 328 | { \ |
| 329 | u8 *_tmp = NULL; \ |
| 330 | _tmp = fib_path_format(fib_path_get_index(_p), _tmp); \ |
| 331 | clib_warning("path:[%d:%s]:" _fmt, \ |
| 332 | fib_path_get_index(_p), _tmp, \ |
| 333 | ##_args); \ |
| 334 | vec_free(_tmp); \ |
| 335 | } |
| 336 | #else |
| 337 | #define FIB_PATH_DBG(_p, _fmt, _args...) |
| 338 | #endif |
| 339 | |
| 340 | static fib_path_t * |
| 341 | fib_path_get (fib_node_index_t index) |
| 342 | { |
| 343 | return (pool_elt_at_index(fib_path_pool, index)); |
| 344 | } |
| 345 | |
| 346 | static fib_node_index_t |
| 347 | fib_path_get_index (fib_path_t *path) |
| 348 | { |
| 349 | return (path - fib_path_pool); |
| 350 | } |
| 351 | |
| 352 | static fib_node_t * |
| 353 | fib_path_get_node (fib_node_index_t index) |
| 354 | { |
| 355 | return ((fib_node_t*)fib_path_get(index)); |
| 356 | } |
| 357 | |
| 358 | static fib_path_t* |
| 359 | fib_path_from_fib_node (fib_node_t *node) |
| 360 | { |
| 361 | #if CLIB_DEBUG > 0 |
| 362 | ASSERT(FIB_NODE_TYPE_PATH == node->fn_type); |
| 363 | #endif |
| 364 | return ((fib_path_t*)node); |
| 365 | } |
| 366 | |
| 367 | u8 * |
| 368 | format_fib_path (u8 * s, va_list * args) |
| 369 | { |
| 370 | fib_path_t *path = va_arg (*args, fib_path_t *); |
| 371 | vnet_main_t * vnm = vnet_get_main(); |
| 372 | fib_path_oper_attribute_t oattr; |
| 373 | fib_path_cfg_attribute_t cattr; |
| 374 | |
| 375 | s = format (s, " index:%d ", fib_path_get_index(path)); |
| 376 | s = format (s, "pl-index:%d ", path->fp_pl_index); |
| 377 | s = format (s, "%U ", format_fib_protocol, path->fp_nh_proto); |
| 378 | s = format (s, "weight=%d ", path->fp_weight); |
| 379 | s = format (s, "%s: ", fib_path_type_names[path->fp_type]); |
| 380 | if (FIB_PATH_OPER_FLAG_NONE != path->fp_oper_flags) { |
| 381 | s = format(s, " oper-flags:"); |
| 382 | FOR_EACH_FIB_PATH_OPER_ATTRIBUTE(oattr) { |
| 383 | if ((1<<oattr) & path->fp_oper_flags) { |
| 384 | s = format (s, "%s,", fib_path_oper_attribute_names[oattr]); |
| 385 | } |
| 386 | } |
| 387 | } |
| 388 | if (FIB_PATH_CFG_FLAG_NONE != path->fp_cfg_flags) { |
| 389 | s = format(s, " cfg-flags:"); |
| 390 | FOR_EACH_FIB_PATH_CFG_ATTRIBUTE(cattr) { |
| 391 | if ((1<<cattr) & path->fp_cfg_flags) { |
| 392 | s = format (s, "%s,", fib_path_cfg_attribute_names[cattr]); |
| 393 | } |
| 394 | } |
| 395 | } |
| 396 | s = format(s, "\n "); |
| 397 | |
| 398 | switch (path->fp_type) |
| 399 | { |
| 400 | case FIB_PATH_TYPE_ATTACHED_NEXT_HOP: |
| 401 | s = format (s, "%U", format_ip46_address, |
| 402 | &path->attached_next_hop.fp_nh, |
| 403 | IP46_TYPE_ANY); |
| 404 | if (path->fp_oper_flags & FIB_PATH_OPER_FLAG_DROP) |
| 405 | { |
| 406 | s = format (s, " if_index:%d", path->attached_next_hop.fp_interface); |
| 407 | } |
| 408 | else |
| 409 | { |
| 410 | s = format (s, " %U", |
| 411 | format_vnet_sw_interface_name, |
| 412 | vnm, |
| 413 | vnet_get_sw_interface( |
| 414 | vnm, |
| 415 | path->attached_next_hop.fp_interface)); |
| 416 | if (vnet_sw_interface_is_p2p(vnet_get_main(), |
| 417 | path->attached_next_hop.fp_interface)) |
| 418 | { |
| 419 | s = format (s, " (p2p)"); |
| 420 | } |
| 421 | } |
| 422 | if (!dpo_id_is_valid(&path->fp_dpo)) |
| 423 | { |
| 424 | s = format(s, "\n unresolved"); |
| 425 | } |
| 426 | else |
| 427 | { |
| 428 | s = format(s, "\n %U", |
| 429 | format_dpo_id, |
| 430 | &path->fp_dpo, 13); |
| 431 | } |
| 432 | break; |
| 433 | case FIB_PATH_TYPE_ATTACHED: |
| 434 | if (path->fp_oper_flags & FIB_PATH_OPER_FLAG_DROP) |
| 435 | { |
| 436 | s = format (s, " if_index:%d", path->attached_next_hop.fp_interface); |
| 437 | } |
| 438 | else |
| 439 | { |
| 440 | s = format (s, " %U", |
| 441 | format_vnet_sw_interface_name, |
| 442 | vnm, |
| 443 | vnet_get_sw_interface( |
| 444 | vnm, |
| 445 | path->attached.fp_interface)); |
| 446 | } |
| 447 | break; |
| 448 | case FIB_PATH_TYPE_RECURSIVE: |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 449 | if (FIB_PROTOCOL_MPLS == path->fp_nh_proto) |
| 450 | { |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 451 | s = format (s, "via %U %U", |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 452 | format_mpls_unicast_label, |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 453 | path->recursive.fp_nh.fp_local_label, |
| 454 | format_mpls_eos_bit, |
| 455 | path->recursive.fp_nh.fp_eos); |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 456 | } |
| 457 | else |
| 458 | { |
| 459 | s = format (s, "via %U", |
| 460 | format_ip46_address, |
| 461 | &path->recursive.fp_nh.fp_ip, |
| 462 | IP46_TYPE_ANY); |
| 463 | } |
| 464 | s = format (s, " in fib:%d", |
| 465 | path->recursive.fp_tbl_id, |
| 466 | path->fp_via_fib); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 467 | s = format (s, " via-fib:%d", path->fp_via_fib); |
| 468 | s = format (s, " via-dpo:[%U:%d]", |
| 469 | format_dpo_type, path->fp_dpo.dpoi_type, |
| 470 | path->fp_dpo.dpoi_index); |
| 471 | |
| 472 | break; |
| 473 | case FIB_PATH_TYPE_RECEIVE: |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 474 | case FIB_PATH_TYPE_INTF_RX: |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 475 | case FIB_PATH_TYPE_SPECIAL: |
| 476 | case FIB_PATH_TYPE_DEAG: |
| 477 | case FIB_PATH_TYPE_EXCLUSIVE: |
| 478 | if (dpo_id_is_valid(&path->fp_dpo)) |
| 479 | { |
| 480 | s = format(s, "%U", format_dpo_id, |
| 481 | &path->fp_dpo, 2); |
| 482 | } |
| 483 | break; |
| 484 | } |
| 485 | return (s); |
| 486 | } |
| 487 | |
| 488 | u8 * |
| 489 | fib_path_format (fib_node_index_t pi, u8 *s) |
| 490 | { |
| 491 | fib_path_t *path; |
| 492 | |
| 493 | path = fib_path_get(pi); |
| 494 | ASSERT(NULL != path); |
| 495 | |
| 496 | return (format (s, "%U", format_fib_path, path)); |
| 497 | } |
| 498 | |
| 499 | u8 * |
| 500 | fib_path_adj_format (fib_node_index_t pi, |
| 501 | u32 indent, |
| 502 | u8 *s) |
| 503 | { |
| 504 | fib_path_t *path; |
| 505 | |
| 506 | path = fib_path_get(pi); |
| 507 | ASSERT(NULL != path); |
| 508 | |
| 509 | if (!dpo_id_is_valid(&path->fp_dpo)) |
| 510 | { |
| 511 | s = format(s, " unresolved"); |
| 512 | } |
| 513 | else |
| 514 | { |
| 515 | s = format(s, "%U", format_dpo_id, |
| 516 | &path->fp_dpo, 2); |
| 517 | } |
| 518 | |
| 519 | return (s); |
| 520 | } |
| 521 | |
| 522 | /* |
| 523 | * fib_path_last_lock_gone |
| 524 | * |
| 525 | * We don't share paths, we share path lists, so the [un]lock functions |
| 526 | * are no-ops |
| 527 | */ |
| 528 | static void |
| 529 | fib_path_last_lock_gone (fib_node_t *node) |
| 530 | { |
| 531 | ASSERT(0); |
| 532 | } |
| 533 | |
| 534 | static const adj_index_t |
| 535 | fib_path_attached_next_hop_get_adj (fib_path_t *path, |
Neale Ranns | 924d03a | 2016-10-19 08:25:46 +0100 | [diff] [blame] | 536 | vnet_link_t link) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 537 | { |
| 538 | if (vnet_sw_interface_is_p2p(vnet_get_main(), |
| 539 | path->attached_next_hop.fp_interface)) |
| 540 | { |
| 541 | /* |
| 542 | * if the interface is p2p then the adj for the specific |
| 543 | * neighbour on that link will never exist. on p2p links |
| 544 | * the subnet address (the attached route) links to the |
| 545 | * auto-adj (see below), we want that adj here too. |
| 546 | */ |
| 547 | return (adj_nbr_add_or_lock(path->fp_nh_proto, |
| 548 | link, |
| 549 | &zero_addr, |
| 550 | path->attached_next_hop.fp_interface)); |
| 551 | } |
| 552 | else |
| 553 | { |
| 554 | return (adj_nbr_add_or_lock(path->fp_nh_proto, |
| 555 | link, |
| 556 | &path->attached_next_hop.fp_nh, |
| 557 | path->attached_next_hop.fp_interface)); |
| 558 | } |
| 559 | } |
| 560 | |
| 561 | static void |
| 562 | fib_path_attached_next_hop_set (fib_path_t *path) |
| 563 | { |
| 564 | /* |
| 565 | * resolve directly via the adjacnecy discribed by the |
| 566 | * interface and next-hop |
| 567 | */ |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 568 | dpo_set(&path->fp_dpo, |
| 569 | DPO_ADJACENCY, |
| 570 | fib_proto_to_dpo(path->fp_nh_proto), |
| 571 | fib_path_attached_next_hop_get_adj( |
| 572 | path, |
| 573 | fib_proto_to_link(path->fp_nh_proto))); |
| 574 | |
| 575 | /* |
| 576 | * become a child of the adjacency so we receive updates |
| 577 | * when its rewrite changes |
| 578 | */ |
| 579 | path->fp_sibling = adj_child_add(path->fp_dpo.dpoi_index, |
| 580 | FIB_NODE_TYPE_PATH, |
| 581 | fib_path_get_index(path)); |
Neale Ranns | 88fc83e | 2017-04-05 08:11:14 -0700 | [diff] [blame] | 582 | |
| 583 | if (!vnet_sw_interface_is_admin_up(vnet_get_main(), |
| 584 | path->attached_next_hop.fp_interface) || |
| 585 | !adj_is_up(path->fp_dpo.dpoi_index)) |
| 586 | { |
| 587 | path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED; |
| 588 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 589 | } |
| 590 | |
Neale Ranns | 8c4611b | 2017-05-23 03:43:47 -0700 | [diff] [blame] | 591 | static const adj_index_t |
| 592 | fib_path_attached_get_adj (fib_path_t *path, |
| 593 | vnet_link_t link) |
| 594 | { |
| 595 | if (vnet_sw_interface_is_p2p(vnet_get_main(), |
| 596 | path->attached.fp_interface)) |
| 597 | { |
| 598 | /* |
| 599 | * point-2-point interfaces do not require a glean, since |
| 600 | * there is nothing to ARP. Install a rewrite/nbr adj instead |
| 601 | */ |
| 602 | return (adj_nbr_add_or_lock(path->fp_nh_proto, |
| 603 | link, |
| 604 | &zero_addr, |
| 605 | path->attached.fp_interface)); |
| 606 | } |
| 607 | else |
| 608 | { |
| 609 | return (adj_glean_add_or_lock(path->fp_nh_proto, |
| 610 | path->attached.fp_interface, |
| 611 | NULL)); |
| 612 | } |
| 613 | } |
| 614 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 615 | /* |
| 616 | * create of update the paths recursive adj |
| 617 | */ |
| 618 | static void |
| 619 | fib_path_recursive_adj_update (fib_path_t *path, |
| 620 | fib_forward_chain_type_t fct, |
| 621 | dpo_id_t *dpo) |
| 622 | { |
Neale Ranns | 948e00f | 2016-10-20 13:39:34 +0100 | [diff] [blame] | 623 | dpo_id_t via_dpo = DPO_INVALID; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 624 | |
| 625 | /* |
| 626 | * get the DPO to resolve through from the via-entry |
| 627 | */ |
| 628 | fib_entry_contribute_forwarding(path->fp_via_fib, |
| 629 | fct, |
| 630 | &via_dpo); |
| 631 | |
| 632 | |
| 633 | /* |
| 634 | * hope for the best - clear if restrictions apply. |
| 635 | */ |
| 636 | path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RESOLVED; |
| 637 | |
| 638 | /* |
| 639 | * Validate any recursion constraints and over-ride the via |
| 640 | * adj if not met |
| 641 | */ |
| 642 | if (path->fp_oper_flags & FIB_PATH_OPER_FLAG_RECURSIVE_LOOP) |
| 643 | { |
| 644 | path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED; |
| 645 | dpo_copy(&via_dpo, drop_dpo_get(fib_proto_to_dpo(path->fp_nh_proto))); |
| 646 | } |
| 647 | else if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_RESOLVE_HOST) |
| 648 | { |
| 649 | /* |
| 650 | * the via FIB must be a host route. |
| 651 | * note the via FIB just added will always be a host route |
| 652 | * since it is an RR source added host route. So what we need to |
| 653 | * check is whether the route has other sources. If it does then |
| 654 | * some other source has added it as a host route. If it doesn't |
| 655 | * then it was added only here and inherits forwarding from a cover. |
| 656 | * the cover is not a host route. |
| 657 | * The RR source is the lowest priority source, so we check if it |
| 658 | * is the best. if it is there are no other sources. |
| 659 | */ |
| 660 | if (fib_entry_get_best_source(path->fp_via_fib) >= FIB_SOURCE_RR) |
| 661 | { |
| 662 | path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED; |
| 663 | dpo_copy(&via_dpo, drop_dpo_get(fib_proto_to_dpo(path->fp_nh_proto))); |
| 664 | |
| 665 | /* |
| 666 | * PIC edge trigger. let the load-balance maps know |
| 667 | */ |
| 668 | load_balance_map_path_state_change(fib_path_get_index(path)); |
| 669 | } |
| 670 | } |
| 671 | else if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_RESOLVE_ATTACHED) |
| 672 | { |
| 673 | /* |
| 674 | * RR source entries inherit the flags from the cover, so |
| 675 | * we can check the via directly |
| 676 | */ |
| 677 | if (!(FIB_ENTRY_FLAG_ATTACHED & fib_entry_get_flags(path->fp_via_fib))) |
| 678 | { |
| 679 | path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED; |
| 680 | dpo_copy(&via_dpo, drop_dpo_get(fib_proto_to_dpo(path->fp_nh_proto))); |
| 681 | |
| 682 | /* |
| 683 | * PIC edge trigger. let the load-balance maps know |
| 684 | */ |
| 685 | load_balance_map_path_state_change(fib_path_get_index(path)); |
| 686 | } |
| 687 | } |
Neale Ranns | 88fc83e | 2017-04-05 08:11:14 -0700 | [diff] [blame] | 688 | /* |
| 689 | * check for over-riding factors on the FIB entry itself |
| 690 | */ |
| 691 | if (!fib_entry_is_resolved(path->fp_via_fib)) |
| 692 | { |
| 693 | path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED; |
| 694 | dpo_copy(&via_dpo, drop_dpo_get(fib_proto_to_dpo(path->fp_nh_proto))); |
| 695 | |
| 696 | /* |
| 697 | * PIC edge trigger. let the load-balance maps know |
| 698 | */ |
| 699 | load_balance_map_path_state_change(fib_path_get_index(path)); |
| 700 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 701 | |
| 702 | /* |
| 703 | * update the path's contributed DPO |
| 704 | */ |
| 705 | dpo_copy(dpo, &via_dpo); |
| 706 | |
| 707 | FIB_PATH_DBG(path, "recursive update: %U", |
| 708 | fib_get_lookup_main(path->fp_nh_proto), |
| 709 | &path->fp_dpo, 2); |
| 710 | |
| 711 | dpo_reset(&via_dpo); |
| 712 | } |
| 713 | |
| 714 | /* |
| 715 | * fib_path_is_permanent_drop |
| 716 | * |
| 717 | * Return !0 if the path is configured to permanently drop, |
| 718 | * despite other attributes. |
| 719 | */ |
| 720 | static int |
| 721 | fib_path_is_permanent_drop (fib_path_t *path) |
| 722 | { |
| 723 | return ((path->fp_cfg_flags & FIB_PATH_CFG_FLAG_DROP) || |
| 724 | (path->fp_oper_flags & FIB_PATH_OPER_FLAG_DROP)); |
| 725 | } |
| 726 | |
| 727 | /* |
| 728 | * fib_path_unresolve |
| 729 | * |
| 730 | * Remove our dependency on the resolution target |
| 731 | */ |
| 732 | static void |
| 733 | fib_path_unresolve (fib_path_t *path) |
| 734 | { |
| 735 | /* |
| 736 | * the forced drop path does not need unresolving |
| 737 | */ |
| 738 | if (fib_path_is_permanent_drop(path)) |
| 739 | { |
| 740 | return; |
| 741 | } |
| 742 | |
| 743 | switch (path->fp_type) |
| 744 | { |
| 745 | case FIB_PATH_TYPE_RECURSIVE: |
| 746 | if (FIB_NODE_INDEX_INVALID != path->fp_via_fib) |
| 747 | { |
| 748 | fib_prefix_t pfx; |
| 749 | |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 750 | fib_entry_get_prefix(path->fp_via_fib, &pfx); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 751 | fib_entry_child_remove(path->fp_via_fib, |
| 752 | path->fp_sibling); |
| 753 | fib_table_entry_special_remove(path->recursive.fp_tbl_id, |
| 754 | &pfx, |
| 755 | FIB_SOURCE_RR); |
| 756 | path->fp_via_fib = FIB_NODE_INDEX_INVALID; |
| 757 | } |
| 758 | break; |
| 759 | case FIB_PATH_TYPE_ATTACHED_NEXT_HOP: |
| 760 | case FIB_PATH_TYPE_ATTACHED: |
| 761 | adj_child_remove(path->fp_dpo.dpoi_index, |
| 762 | path->fp_sibling); |
| 763 | adj_unlock(path->fp_dpo.dpoi_index); |
| 764 | break; |
| 765 | case FIB_PATH_TYPE_EXCLUSIVE: |
| 766 | dpo_reset(&path->exclusive.fp_ex_dpo); |
| 767 | break; |
| 768 | case FIB_PATH_TYPE_SPECIAL: |
| 769 | case FIB_PATH_TYPE_RECEIVE: |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 770 | case FIB_PATH_TYPE_INTF_RX: |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 771 | case FIB_PATH_TYPE_DEAG: |
| 772 | /* |
| 773 | * these hold only the path's DPO, which is reset below. |
| 774 | */ |
| 775 | break; |
| 776 | } |
| 777 | |
| 778 | /* |
| 779 | * release the adj we were holding and pick up the |
| 780 | * drop just in case. |
| 781 | */ |
| 782 | dpo_reset(&path->fp_dpo); |
| 783 | path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED; |
| 784 | |
| 785 | return; |
| 786 | } |
| 787 | |
| 788 | static fib_forward_chain_type_t |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 789 | fib_path_to_chain_type (const fib_path_t *path) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 790 | { |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 791 | switch (path->fp_nh_proto) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 792 | { |
| 793 | case FIB_PROTOCOL_IP4: |
| 794 | return (FIB_FORW_CHAIN_TYPE_UNICAST_IP4); |
| 795 | case FIB_PROTOCOL_IP6: |
| 796 | return (FIB_FORW_CHAIN_TYPE_UNICAST_IP6); |
| 797 | case FIB_PROTOCOL_MPLS: |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 798 | if (FIB_PATH_TYPE_RECURSIVE == path->fp_type && |
| 799 | MPLS_EOS == path->recursive.fp_nh.fp_eos) |
| 800 | { |
| 801 | return (FIB_FORW_CHAIN_TYPE_MPLS_EOS); |
| 802 | } |
| 803 | else |
| 804 | { |
Neale Ranns | 9f171f5 | 2017-04-11 08:56:53 -0700 | [diff] [blame] | 805 | return (FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS); |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 806 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 807 | } |
| 808 | return (FIB_FORW_CHAIN_TYPE_UNICAST_IP4); |
| 809 | } |
| 810 | |
| 811 | /* |
| 812 | * fib_path_back_walk_notify |
| 813 | * |
| 814 | * A back walk has reach this path. |
| 815 | */ |
| 816 | static fib_node_back_walk_rc_t |
| 817 | fib_path_back_walk_notify (fib_node_t *node, |
| 818 | fib_node_back_walk_ctx_t *ctx) |
| 819 | { |
| 820 | fib_path_t *path; |
| 821 | |
| 822 | path = fib_path_from_fib_node(node); |
| 823 | |
| 824 | switch (path->fp_type) |
| 825 | { |
| 826 | case FIB_PATH_TYPE_RECURSIVE: |
| 827 | if (FIB_NODE_BW_REASON_FLAG_EVALUATE & ctx->fnbw_reason) |
| 828 | { |
| 829 | /* |
| 830 | * modify the recursive adjacency to use the new forwarding |
| 831 | * of the via-fib. |
| 832 | * this update is visible to packets in flight in the DP. |
| 833 | */ |
| 834 | fib_path_recursive_adj_update( |
| 835 | path, |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 836 | fib_path_to_chain_type(path), |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 837 | &path->fp_dpo); |
| 838 | } |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 839 | if ((FIB_NODE_BW_REASON_FLAG_ADJ_UPDATE & ctx->fnbw_reason) || |
| 840 | (FIB_NODE_BW_REASON_FLAG_ADJ_DOWN & ctx->fnbw_reason)) |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 841 | { |
| 842 | /* |
| 843 | * ADJ updates (complete<->incomplete) do not need to propagate to |
| 844 | * recursive entries. |
| 845 | * The only reason its needed as far back as here, is that the adj |
| 846 | * and the incomplete adj are a different DPO type, so the LBs need |
| 847 | * to re-stack. |
| 848 | * If this walk was quashed in the fib_entry, then any non-fib_path |
| 849 | * children (like tunnels that collapse out the LB when they stack) |
| 850 | * would not see the update. |
| 851 | */ |
| 852 | return (FIB_NODE_BACK_WALK_CONTINUE); |
| 853 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 854 | break; |
| 855 | case FIB_PATH_TYPE_ATTACHED_NEXT_HOP: |
| 856 | /* |
| 857 | FIXME comment |
| 858 | * ADJ_UPDATE backwalk pass silently through here and up to |
| 859 | * the path-list when the multipath adj collapse occurs. |
| 860 | * The reason we do this is that the assumtption is that VPP |
| 861 | * runs in an environment where the Control-Plane is remote |
| 862 | * and hence reacts slowly to link up down. In order to remove |
| 863 | * this down link from the ECMP set quickly, we back-walk. |
| 864 | * VPP also has dedicated CPUs, so we are not stealing resources |
| 865 | * from the CP to do so. |
| 866 | */ |
| 867 | if (FIB_NODE_BW_REASON_FLAG_INTERFACE_UP & ctx->fnbw_reason) |
| 868 | { |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 869 | if (path->fp_oper_flags & FIB_PATH_OPER_FLAG_RESOLVED) |
| 870 | { |
| 871 | /* |
| 872 | * alreday resolved. no need to walk back again |
| 873 | */ |
| 874 | return (FIB_NODE_BACK_WALK_CONTINUE); |
| 875 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 876 | path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RESOLVED; |
| 877 | } |
| 878 | if (FIB_NODE_BW_REASON_FLAG_INTERFACE_DOWN & ctx->fnbw_reason) |
| 879 | { |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 880 | if (!(path->fp_oper_flags & FIB_PATH_OPER_FLAG_RESOLVED)) |
| 881 | { |
| 882 | /* |
| 883 | * alreday unresolved. no need to walk back again |
| 884 | */ |
| 885 | return (FIB_NODE_BACK_WALK_CONTINUE); |
| 886 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 887 | path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED; |
| 888 | } |
| 889 | if (FIB_NODE_BW_REASON_FLAG_INTERFACE_DELETE & ctx->fnbw_reason) |
| 890 | { |
| 891 | /* |
| 892 | * The interface this path resolves through has been deleted. |
| 893 | * This will leave the path in a permanent drop state. The route |
| 894 | * needs to be removed and readded (and hence the path-list deleted) |
| 895 | * before it can forward again. |
| 896 | */ |
| 897 | fib_path_unresolve(path); |
| 898 | path->fp_oper_flags |= FIB_PATH_OPER_FLAG_DROP; |
| 899 | } |
| 900 | if (FIB_NODE_BW_REASON_FLAG_ADJ_UPDATE & ctx->fnbw_reason) |
| 901 | { |
| 902 | /* |
| 903 | * restack the DPO to pick up the correct DPO sub-type |
| 904 | */ |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 905 | uword if_is_up; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 906 | adj_index_t ai; |
| 907 | |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 908 | if_is_up = vnet_sw_interface_is_admin_up( |
| 909 | vnet_get_main(), |
| 910 | path->attached_next_hop.fp_interface); |
| 911 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 912 | ai = fib_path_attached_next_hop_get_adj( |
| 913 | path, |
| 914 | fib_proto_to_link(path->fp_nh_proto)); |
| 915 | |
Neale Ranns | 88fc83e | 2017-04-05 08:11:14 -0700 | [diff] [blame] | 916 | path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED; |
| 917 | if (if_is_up && adj_is_up(ai)) |
| 918 | { |
| 919 | path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RESOLVED; |
| 920 | } |
| 921 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 922 | dpo_set(&path->fp_dpo, DPO_ADJACENCY, |
| 923 | fib_proto_to_dpo(path->fp_nh_proto), |
| 924 | ai); |
| 925 | adj_unlock(ai); |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 926 | |
| 927 | if (!if_is_up) |
| 928 | { |
| 929 | /* |
| 930 | * If the interface is not up there is no reason to walk |
| 931 | * back to children. if we did they would only evalute |
| 932 | * that this path is unresolved and hence it would |
| 933 | * not contribute the adjacency - so it would be wasted |
| 934 | * CPU time. |
| 935 | */ |
| 936 | return (FIB_NODE_BACK_WALK_CONTINUE); |
| 937 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 938 | } |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 939 | if (FIB_NODE_BW_REASON_FLAG_ADJ_DOWN & ctx->fnbw_reason) |
| 940 | { |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 941 | if (!(path->fp_oper_flags & FIB_PATH_OPER_FLAG_RESOLVED)) |
| 942 | { |
| 943 | /* |
| 944 | * alreday unresolved. no need to walk back again |
| 945 | */ |
| 946 | return (FIB_NODE_BACK_WALK_CONTINUE); |
| 947 | } |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 948 | /* |
| 949 | * the adj has gone down. the path is no longer resolved. |
| 950 | */ |
| 951 | path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED; |
| 952 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 953 | break; |
| 954 | case FIB_PATH_TYPE_ATTACHED: |
| 955 | /* |
| 956 | * FIXME; this could schedule a lower priority walk, since attached |
| 957 | * routes are not usually in ECMP configurations so the backwalk to |
| 958 | * the FIB entry does not need to be high priority |
| 959 | */ |
| 960 | if (FIB_NODE_BW_REASON_FLAG_INTERFACE_UP & ctx->fnbw_reason) |
| 961 | { |
| 962 | path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RESOLVED; |
| 963 | } |
| 964 | if (FIB_NODE_BW_REASON_FLAG_INTERFACE_DOWN & ctx->fnbw_reason) |
| 965 | { |
| 966 | path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED; |
| 967 | } |
| 968 | if (FIB_NODE_BW_REASON_FLAG_INTERFACE_DELETE & ctx->fnbw_reason) |
| 969 | { |
| 970 | fib_path_unresolve(path); |
| 971 | path->fp_oper_flags |= FIB_PATH_OPER_FLAG_DROP; |
| 972 | } |
| 973 | break; |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 974 | case FIB_PATH_TYPE_INTF_RX: |
| 975 | ASSERT(0); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 976 | case FIB_PATH_TYPE_DEAG: |
| 977 | /* |
| 978 | * FIXME When VRF delete is allowed this will need a poke. |
| 979 | */ |
| 980 | case FIB_PATH_TYPE_SPECIAL: |
| 981 | case FIB_PATH_TYPE_RECEIVE: |
| 982 | case FIB_PATH_TYPE_EXCLUSIVE: |
| 983 | /* |
| 984 | * these path types have no parents. so to be |
| 985 | * walked from one is unexpected. |
| 986 | */ |
| 987 | ASSERT(0); |
| 988 | break; |
| 989 | } |
| 990 | |
| 991 | /* |
| 992 | * propagate the backwalk further to the path-list |
| 993 | */ |
| 994 | fib_path_list_back_walk(path->fp_pl_index, ctx); |
| 995 | |
| 996 | return (FIB_NODE_BACK_WALK_CONTINUE); |
| 997 | } |
| 998 | |
Neale Ranns | 6c3ebcc | 2016-10-02 21:20:15 +0100 | [diff] [blame] | 999 | static void |
| 1000 | fib_path_memory_show (void) |
| 1001 | { |
| 1002 | fib_show_memory_usage("Path", |
| 1003 | pool_elts(fib_path_pool), |
| 1004 | pool_len(fib_path_pool), |
| 1005 | sizeof(fib_path_t)); |
| 1006 | } |
| 1007 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1008 | /* |
| 1009 | * The FIB path's graph node virtual function table |
| 1010 | */ |
| 1011 | static const fib_node_vft_t fib_path_vft = { |
| 1012 | .fnv_get = fib_path_get_node, |
| 1013 | .fnv_last_lock = fib_path_last_lock_gone, |
| 1014 | .fnv_back_walk = fib_path_back_walk_notify, |
Neale Ranns | 6c3ebcc | 2016-10-02 21:20:15 +0100 | [diff] [blame] | 1015 | .fnv_mem_show = fib_path_memory_show, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1016 | }; |
| 1017 | |
| 1018 | static fib_path_cfg_flags_t |
| 1019 | fib_path_route_flags_to_cfg_flags (const fib_route_path_t *rpath) |
| 1020 | { |
Neale Ranns | 450cd30 | 2016-11-09 17:49:42 +0000 | [diff] [blame] | 1021 | fib_path_cfg_flags_t cfg_flags = FIB_PATH_CFG_FLAG_NONE; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1022 | |
| 1023 | if (rpath->frp_flags & FIB_ROUTE_PATH_RESOLVE_VIA_HOST) |
| 1024 | cfg_flags |= FIB_PATH_CFG_FLAG_RESOLVE_HOST; |
| 1025 | if (rpath->frp_flags & FIB_ROUTE_PATH_RESOLVE_VIA_ATTACHED) |
| 1026 | cfg_flags |= FIB_PATH_CFG_FLAG_RESOLVE_ATTACHED; |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 1027 | if (rpath->frp_flags & FIB_ROUTE_PATH_LOCAL) |
| 1028 | cfg_flags |= FIB_PATH_CFG_FLAG_LOCAL; |
Neale Ranns | 4b919a5 | 2017-03-11 05:55:21 -0800 | [diff] [blame] | 1029 | if (rpath->frp_flags & FIB_ROUTE_PATH_ATTACHED) |
| 1030 | cfg_flags |= FIB_PATH_CFG_FLAG_ATTACHED; |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1031 | if (rpath->frp_flags & FIB_ROUTE_PATH_INTF_RX) |
| 1032 | cfg_flags |= FIB_PATH_CFG_FLAG_INTF_RX; |
| 1033 | if (rpath->frp_flags & FIB_ROUTE_PATH_RPF_ID) |
| 1034 | cfg_flags |= FIB_PATH_CFG_FLAG_RPF_ID; |
| 1035 | if (rpath->frp_flags & FIB_ROUTE_PATH_EXCLUSIVE) |
| 1036 | cfg_flags |= FIB_PATH_CFG_FLAG_EXCLUSIVE; |
| 1037 | if (rpath->frp_flags & FIB_ROUTE_PATH_DROP) |
| 1038 | cfg_flags |= FIB_PATH_CFG_FLAG_DROP; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1039 | |
| 1040 | return (cfg_flags); |
| 1041 | } |
| 1042 | |
| 1043 | /* |
| 1044 | * fib_path_create |
| 1045 | * |
| 1046 | * Create and initialise a new path object. |
| 1047 | * return the index of the path. |
| 1048 | */ |
| 1049 | fib_node_index_t |
| 1050 | fib_path_create (fib_node_index_t pl_index, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1051 | const fib_route_path_t *rpath) |
| 1052 | { |
| 1053 | fib_path_t *path; |
| 1054 | |
| 1055 | pool_get(fib_path_pool, path); |
| 1056 | memset(path, 0, sizeof(*path)); |
| 1057 | |
| 1058 | fib_node_init(&path->fp_node, |
| 1059 | FIB_NODE_TYPE_PATH); |
| 1060 | |
| 1061 | dpo_reset(&path->fp_dpo); |
| 1062 | path->fp_pl_index = pl_index; |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1063 | path->fp_nh_proto = rpath->frp_proto; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1064 | path->fp_via_fib = FIB_NODE_INDEX_INVALID; |
| 1065 | path->fp_weight = rpath->frp_weight; |
Neale Ranns | 0bd36ea | 2016-11-16 11:47:44 +0000 | [diff] [blame] | 1066 | if (0 == path->fp_weight) |
| 1067 | { |
| 1068 | /* |
| 1069 | * a weight of 0 is a meaningless value. We could either reject it, and thus force |
| 1070 | * clients to always use 1, or we can accept it and fixup approrpiately. |
| 1071 | */ |
| 1072 | path->fp_weight = 1; |
| 1073 | } |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1074 | path->fp_cfg_flags = fib_path_route_flags_to_cfg_flags(rpath); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1075 | |
| 1076 | /* |
| 1077 | * deduce the path's tpye from the parementers and save what is needed. |
| 1078 | */ |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 1079 | if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_LOCAL) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1080 | { |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 1081 | path->fp_type = FIB_PATH_TYPE_RECEIVE; |
| 1082 | path->receive.fp_interface = rpath->frp_sw_if_index; |
| 1083 | path->receive.fp_addr = rpath->frp_addr; |
| 1084 | } |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1085 | else if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_INTF_RX) |
| 1086 | { |
| 1087 | path->fp_type = FIB_PATH_TYPE_INTF_RX; |
| 1088 | path->intf_rx.fp_interface = rpath->frp_sw_if_index; |
| 1089 | } |
| 1090 | else if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_RPF_ID) |
| 1091 | { |
| 1092 | path->fp_type = FIB_PATH_TYPE_DEAG; |
| 1093 | path->deag.fp_tbl_id = rpath->frp_fib_index; |
| 1094 | path->deag.fp_rpf_id = rpath->frp_rpf_id; |
| 1095 | } |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 1096 | else if (~0 != rpath->frp_sw_if_index) |
| 1097 | { |
| 1098 | if (ip46_address_is_zero(&rpath->frp_addr)) |
| 1099 | { |
| 1100 | path->fp_type = FIB_PATH_TYPE_ATTACHED; |
| 1101 | path->attached.fp_interface = rpath->frp_sw_if_index; |
| 1102 | } |
| 1103 | else |
| 1104 | { |
| 1105 | path->fp_type = FIB_PATH_TYPE_ATTACHED_NEXT_HOP; |
| 1106 | path->attached_next_hop.fp_interface = rpath->frp_sw_if_index; |
| 1107 | path->attached_next_hop.fp_nh = rpath->frp_addr; |
| 1108 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1109 | } |
| 1110 | else |
| 1111 | { |
| 1112 | if (ip46_address_is_zero(&rpath->frp_addr)) |
| 1113 | { |
| 1114 | if (~0 == rpath->frp_fib_index) |
| 1115 | { |
| 1116 | path->fp_type = FIB_PATH_TYPE_SPECIAL; |
| 1117 | } |
| 1118 | else |
| 1119 | { |
| 1120 | path->fp_type = FIB_PATH_TYPE_DEAG; |
| 1121 | path->deag.fp_tbl_id = rpath->frp_fib_index; |
| 1122 | } |
| 1123 | } |
| 1124 | else |
| 1125 | { |
| 1126 | path->fp_type = FIB_PATH_TYPE_RECURSIVE; |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 1127 | if (FIB_PROTOCOL_MPLS == path->fp_nh_proto) |
| 1128 | { |
| 1129 | path->recursive.fp_nh.fp_local_label = rpath->frp_local_label; |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1130 | path->recursive.fp_nh.fp_eos = rpath->frp_eos; |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 1131 | } |
| 1132 | else |
| 1133 | { |
| 1134 | path->recursive.fp_nh.fp_ip = rpath->frp_addr; |
| 1135 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1136 | path->recursive.fp_tbl_id = rpath->frp_fib_index; |
| 1137 | } |
| 1138 | } |
| 1139 | |
| 1140 | FIB_PATH_DBG(path, "create"); |
| 1141 | |
| 1142 | return (fib_path_get_index(path)); |
| 1143 | } |
| 1144 | |
| 1145 | /* |
| 1146 | * fib_path_create_special |
| 1147 | * |
| 1148 | * Create and initialise a new path object. |
| 1149 | * return the index of the path. |
| 1150 | */ |
| 1151 | fib_node_index_t |
| 1152 | fib_path_create_special (fib_node_index_t pl_index, |
| 1153 | fib_protocol_t nh_proto, |
| 1154 | fib_path_cfg_flags_t flags, |
| 1155 | const dpo_id_t *dpo) |
| 1156 | { |
| 1157 | fib_path_t *path; |
| 1158 | |
| 1159 | pool_get(fib_path_pool, path); |
| 1160 | memset(path, 0, sizeof(*path)); |
| 1161 | |
| 1162 | fib_node_init(&path->fp_node, |
| 1163 | FIB_NODE_TYPE_PATH); |
| 1164 | dpo_reset(&path->fp_dpo); |
| 1165 | |
| 1166 | path->fp_pl_index = pl_index; |
| 1167 | path->fp_weight = 1; |
| 1168 | path->fp_nh_proto = nh_proto; |
| 1169 | path->fp_via_fib = FIB_NODE_INDEX_INVALID; |
| 1170 | path->fp_cfg_flags = flags; |
| 1171 | |
| 1172 | if (FIB_PATH_CFG_FLAG_DROP & flags) |
| 1173 | { |
| 1174 | path->fp_type = FIB_PATH_TYPE_SPECIAL; |
| 1175 | } |
| 1176 | else if (FIB_PATH_CFG_FLAG_LOCAL & flags) |
| 1177 | { |
| 1178 | path->fp_type = FIB_PATH_TYPE_RECEIVE; |
| 1179 | path->attached.fp_interface = FIB_NODE_INDEX_INVALID; |
| 1180 | } |
| 1181 | else |
| 1182 | { |
| 1183 | path->fp_type = FIB_PATH_TYPE_EXCLUSIVE; |
| 1184 | ASSERT(NULL != dpo); |
| 1185 | dpo_copy(&path->exclusive.fp_ex_dpo, dpo); |
| 1186 | } |
| 1187 | |
| 1188 | return (fib_path_get_index(path)); |
| 1189 | } |
| 1190 | |
| 1191 | /* |
| 1192 | * fib_path_copy |
| 1193 | * |
| 1194 | * Copy a path. return index of new path. |
| 1195 | */ |
| 1196 | fib_node_index_t |
| 1197 | fib_path_copy (fib_node_index_t path_index, |
| 1198 | fib_node_index_t path_list_index) |
| 1199 | { |
| 1200 | fib_path_t *path, *orig_path; |
| 1201 | |
| 1202 | pool_get(fib_path_pool, path); |
| 1203 | |
| 1204 | orig_path = fib_path_get(path_index); |
| 1205 | ASSERT(NULL != orig_path); |
| 1206 | |
| 1207 | memcpy(path, orig_path, sizeof(*path)); |
| 1208 | |
| 1209 | FIB_PATH_DBG(path, "create-copy:%d", path_index); |
| 1210 | |
| 1211 | /* |
| 1212 | * reset the dynamic section |
| 1213 | */ |
| 1214 | fib_node_init(&path->fp_node, FIB_NODE_TYPE_PATH); |
| 1215 | path->fp_oper_flags = FIB_PATH_OPER_FLAG_NONE; |
| 1216 | path->fp_pl_index = path_list_index; |
| 1217 | path->fp_via_fib = FIB_NODE_INDEX_INVALID; |
| 1218 | memset(&path->fp_dpo, 0, sizeof(path->fp_dpo)); |
| 1219 | dpo_reset(&path->fp_dpo); |
| 1220 | |
| 1221 | return (fib_path_get_index(path)); |
| 1222 | } |
| 1223 | |
| 1224 | /* |
| 1225 | * fib_path_destroy |
| 1226 | * |
| 1227 | * destroy a path that is no longer required |
| 1228 | */ |
| 1229 | void |
| 1230 | fib_path_destroy (fib_node_index_t path_index) |
| 1231 | { |
| 1232 | fib_path_t *path; |
| 1233 | |
| 1234 | path = fib_path_get(path_index); |
| 1235 | |
| 1236 | ASSERT(NULL != path); |
| 1237 | FIB_PATH_DBG(path, "destroy"); |
| 1238 | |
| 1239 | fib_path_unresolve(path); |
| 1240 | |
| 1241 | fib_node_deinit(&path->fp_node); |
| 1242 | pool_put(fib_path_pool, path); |
| 1243 | } |
| 1244 | |
| 1245 | /* |
| 1246 | * fib_path_destroy |
| 1247 | * |
| 1248 | * destroy a path that is no longer required |
| 1249 | */ |
| 1250 | uword |
| 1251 | fib_path_hash (fib_node_index_t path_index) |
| 1252 | { |
| 1253 | fib_path_t *path; |
| 1254 | |
| 1255 | path = fib_path_get(path_index); |
| 1256 | |
| 1257 | return (hash_memory(STRUCT_MARK_PTR(path, path_hash_start), |
| 1258 | (STRUCT_OFFSET_OF(fib_path_t, path_hash_end) - |
| 1259 | STRUCT_OFFSET_OF(fib_path_t, path_hash_start)), |
| 1260 | 0)); |
| 1261 | } |
| 1262 | |
| 1263 | /* |
| 1264 | * fib_path_cmp_i |
| 1265 | * |
| 1266 | * Compare two paths for equivalence. |
| 1267 | */ |
| 1268 | static int |
| 1269 | fib_path_cmp_i (const fib_path_t *path1, |
| 1270 | const fib_path_t *path2) |
| 1271 | { |
| 1272 | int res; |
| 1273 | |
| 1274 | res = 1; |
| 1275 | |
| 1276 | /* |
| 1277 | * paths of different types and protocol are not equal. |
| 1278 | * different weights only are the same path. |
| 1279 | */ |
| 1280 | if (path1->fp_type != path2->fp_type) |
| 1281 | { |
| 1282 | res = (path1->fp_type - path2->fp_type); |
| 1283 | } |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 1284 | else if (path1->fp_nh_proto != path2->fp_nh_proto) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1285 | { |
| 1286 | res = (path1->fp_nh_proto - path2->fp_nh_proto); |
| 1287 | } |
| 1288 | else |
| 1289 | { |
| 1290 | /* |
| 1291 | * both paths are of the same type. |
| 1292 | * consider each type and its attributes in turn. |
| 1293 | */ |
| 1294 | switch (path1->fp_type) |
| 1295 | { |
| 1296 | case FIB_PATH_TYPE_ATTACHED_NEXT_HOP: |
| 1297 | res = ip46_address_cmp(&path1->attached_next_hop.fp_nh, |
| 1298 | &path2->attached_next_hop.fp_nh); |
| 1299 | if (0 == res) { |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1300 | res = (path1->attached_next_hop.fp_interface - |
| 1301 | path2->attached_next_hop.fp_interface); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1302 | } |
| 1303 | break; |
| 1304 | case FIB_PATH_TYPE_ATTACHED: |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1305 | res = (path1->attached.fp_interface - |
| 1306 | path2->attached.fp_interface); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1307 | break; |
| 1308 | case FIB_PATH_TYPE_RECURSIVE: |
| 1309 | res = ip46_address_cmp(&path1->recursive.fp_nh, |
| 1310 | &path2->recursive.fp_nh); |
| 1311 | |
| 1312 | if (0 == res) |
| 1313 | { |
| 1314 | res = (path1->recursive.fp_tbl_id - path2->recursive.fp_tbl_id); |
| 1315 | } |
| 1316 | break; |
| 1317 | case FIB_PATH_TYPE_DEAG: |
| 1318 | res = (path1->deag.fp_tbl_id - path2->deag.fp_tbl_id); |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1319 | if (0 == res) |
| 1320 | { |
| 1321 | res = (path1->deag.fp_rpf_id - path2->deag.fp_rpf_id); |
| 1322 | } |
| 1323 | break; |
| 1324 | case FIB_PATH_TYPE_INTF_RX: |
| 1325 | res = (path1->intf_rx.fp_interface - path2->intf_rx.fp_interface); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1326 | break; |
| 1327 | case FIB_PATH_TYPE_SPECIAL: |
| 1328 | case FIB_PATH_TYPE_RECEIVE: |
| 1329 | case FIB_PATH_TYPE_EXCLUSIVE: |
| 1330 | res = 0; |
| 1331 | break; |
| 1332 | } |
| 1333 | } |
| 1334 | return (res); |
| 1335 | } |
| 1336 | |
| 1337 | /* |
| 1338 | * fib_path_cmp_for_sort |
| 1339 | * |
| 1340 | * Compare two paths for equivalence. Used during path sorting. |
| 1341 | * As usual 0 means equal. |
| 1342 | */ |
| 1343 | int |
| 1344 | fib_path_cmp_for_sort (void * v1, |
| 1345 | void * v2) |
| 1346 | { |
| 1347 | fib_node_index_t *pi1 = v1, *pi2 = v2; |
| 1348 | fib_path_t *path1, *path2; |
| 1349 | |
| 1350 | path1 = fib_path_get(*pi1); |
| 1351 | path2 = fib_path_get(*pi2); |
| 1352 | |
| 1353 | return (fib_path_cmp_i(path1, path2)); |
| 1354 | } |
| 1355 | |
| 1356 | /* |
| 1357 | * fib_path_cmp |
| 1358 | * |
| 1359 | * Compare two paths for equivalence. |
| 1360 | */ |
| 1361 | int |
| 1362 | fib_path_cmp (fib_node_index_t pi1, |
| 1363 | fib_node_index_t pi2) |
| 1364 | { |
| 1365 | fib_path_t *path1, *path2; |
| 1366 | |
| 1367 | path1 = fib_path_get(pi1); |
| 1368 | path2 = fib_path_get(pi2); |
| 1369 | |
| 1370 | return (fib_path_cmp_i(path1, path2)); |
| 1371 | } |
| 1372 | |
| 1373 | int |
| 1374 | fib_path_cmp_w_route_path (fib_node_index_t path_index, |
| 1375 | const fib_route_path_t *rpath) |
| 1376 | { |
| 1377 | fib_path_t *path; |
| 1378 | int res; |
| 1379 | |
| 1380 | path = fib_path_get(path_index); |
| 1381 | |
| 1382 | res = 1; |
| 1383 | |
| 1384 | if (path->fp_weight != rpath->frp_weight) |
| 1385 | { |
| 1386 | res = (path->fp_weight - rpath->frp_weight); |
| 1387 | } |
| 1388 | else |
| 1389 | { |
| 1390 | /* |
| 1391 | * both paths are of the same type. |
| 1392 | * consider each type and its attributes in turn. |
| 1393 | */ |
| 1394 | switch (path->fp_type) |
| 1395 | { |
| 1396 | case FIB_PATH_TYPE_ATTACHED_NEXT_HOP: |
| 1397 | res = ip46_address_cmp(&path->attached_next_hop.fp_nh, |
| 1398 | &rpath->frp_addr); |
| 1399 | if (0 == res) |
| 1400 | { |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1401 | res = (path->attached_next_hop.fp_interface - |
| 1402 | rpath->frp_sw_if_index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1403 | } |
| 1404 | break; |
| 1405 | case FIB_PATH_TYPE_ATTACHED: |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1406 | res = (path->attached.fp_interface - rpath->frp_sw_if_index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1407 | break; |
| 1408 | case FIB_PATH_TYPE_RECURSIVE: |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 1409 | if (FIB_PROTOCOL_MPLS == path->fp_nh_proto) |
| 1410 | { |
| 1411 | res = path->recursive.fp_nh.fp_local_label - rpath->frp_local_label; |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1412 | |
| 1413 | if (res == 0) |
| 1414 | { |
| 1415 | res = path->recursive.fp_nh.fp_eos - rpath->frp_eos; |
| 1416 | } |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 1417 | } |
| 1418 | else |
| 1419 | { |
| 1420 | res = ip46_address_cmp(&path->recursive.fp_nh.fp_ip, |
| 1421 | &rpath->frp_addr); |
| 1422 | } |
| 1423 | |
| 1424 | if (0 == res) |
| 1425 | { |
| 1426 | res = (path->recursive.fp_tbl_id - rpath->frp_fib_index); |
| 1427 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1428 | break; |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1429 | case FIB_PATH_TYPE_INTF_RX: |
| 1430 | res = (path->intf_rx.fp_interface - rpath->frp_sw_if_index); |
| 1431 | break; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1432 | case FIB_PATH_TYPE_DEAG: |
| 1433 | res = (path->deag.fp_tbl_id - rpath->frp_fib_index); |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1434 | if (0 == res) |
| 1435 | { |
| 1436 | res = (path->deag.fp_rpf_id - rpath->frp_rpf_id); |
| 1437 | } |
| 1438 | break; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1439 | case FIB_PATH_TYPE_SPECIAL: |
| 1440 | case FIB_PATH_TYPE_RECEIVE: |
| 1441 | case FIB_PATH_TYPE_EXCLUSIVE: |
| 1442 | res = 0; |
| 1443 | break; |
| 1444 | } |
| 1445 | } |
| 1446 | return (res); |
| 1447 | } |
| 1448 | |
| 1449 | /* |
| 1450 | * fib_path_recursive_loop_detect |
| 1451 | * |
| 1452 | * A forward walk of the FIB object graph to detect for a cycle/loop. This |
| 1453 | * walk is initiated when an entry is linking to a new path list or from an old. |
| 1454 | * The entry vector passed contains all the FIB entrys that are children of this |
| 1455 | * path (it is all the entries encountered on the walk so far). If this vector |
| 1456 | * contains the entry this path resolve via, then a loop is about to form. |
| 1457 | * The loop must be allowed to form, since we need the dependencies in place |
| 1458 | * so that we can track when the loop breaks. |
| 1459 | * However, we MUST not produce a loop in the forwarding graph (else packets |
| 1460 | * would loop around the switch path until the loop breaks), so we mark recursive |
| 1461 | * paths as looped so that they do not contribute forwarding information. |
| 1462 | * By marking the path as looped, an etry such as; |
| 1463 | * X/Y |
| 1464 | * via a.a.a.a (looped) |
| 1465 | * via b.b.b.b (not looped) |
| 1466 | * can still forward using the info provided by b.b.b.b only |
| 1467 | */ |
| 1468 | int |
| 1469 | fib_path_recursive_loop_detect (fib_node_index_t path_index, |
| 1470 | fib_node_index_t **entry_indicies) |
| 1471 | { |
| 1472 | fib_path_t *path; |
| 1473 | |
| 1474 | path = fib_path_get(path_index); |
| 1475 | |
| 1476 | /* |
| 1477 | * the forced drop path is never looped, cos it is never resolved. |
| 1478 | */ |
| 1479 | if (fib_path_is_permanent_drop(path)) |
| 1480 | { |
| 1481 | return (0); |
| 1482 | } |
| 1483 | |
| 1484 | switch (path->fp_type) |
| 1485 | { |
| 1486 | case FIB_PATH_TYPE_RECURSIVE: |
| 1487 | { |
| 1488 | fib_node_index_t *entry_index, *entries; |
| 1489 | int looped = 0; |
| 1490 | entries = *entry_indicies; |
| 1491 | |
| 1492 | vec_foreach(entry_index, entries) { |
| 1493 | if (*entry_index == path->fp_via_fib) |
| 1494 | { |
| 1495 | /* |
| 1496 | * the entry that is about to link to this path-list (or |
| 1497 | * one of this path-list's children) is the same entry that |
| 1498 | * this recursive path resolves through. this is a cycle. |
| 1499 | * abort the walk. |
| 1500 | */ |
| 1501 | looped = 1; |
| 1502 | break; |
| 1503 | } |
| 1504 | } |
| 1505 | |
| 1506 | if (looped) |
| 1507 | { |
| 1508 | FIB_PATH_DBG(path, "recursive loop formed"); |
| 1509 | path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RECURSIVE_LOOP; |
| 1510 | |
| 1511 | dpo_copy(&path->fp_dpo, |
| 1512 | drop_dpo_get(fib_proto_to_dpo(path->fp_nh_proto))); |
| 1513 | } |
| 1514 | else |
| 1515 | { |
| 1516 | /* |
| 1517 | * no loop here yet. keep forward walking the graph. |
| 1518 | */ |
| 1519 | if (fib_entry_recursive_loop_detect(path->fp_via_fib, entry_indicies)) |
| 1520 | { |
| 1521 | FIB_PATH_DBG(path, "recursive loop formed"); |
| 1522 | path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RECURSIVE_LOOP; |
| 1523 | } |
| 1524 | else |
| 1525 | { |
| 1526 | FIB_PATH_DBG(path, "recursive loop cleared"); |
| 1527 | path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RECURSIVE_LOOP; |
| 1528 | } |
| 1529 | } |
| 1530 | break; |
| 1531 | } |
| 1532 | case FIB_PATH_TYPE_ATTACHED_NEXT_HOP: |
| 1533 | case FIB_PATH_TYPE_ATTACHED: |
| 1534 | case FIB_PATH_TYPE_SPECIAL: |
| 1535 | case FIB_PATH_TYPE_DEAG: |
| 1536 | case FIB_PATH_TYPE_RECEIVE: |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1537 | case FIB_PATH_TYPE_INTF_RX: |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1538 | case FIB_PATH_TYPE_EXCLUSIVE: |
| 1539 | /* |
| 1540 | * these path types cannot be part of a loop, since they are the leaves |
| 1541 | * of the graph. |
| 1542 | */ |
| 1543 | break; |
| 1544 | } |
| 1545 | |
| 1546 | return (fib_path_is_looped(path_index)); |
| 1547 | } |
| 1548 | |
| 1549 | int |
| 1550 | fib_path_resolve (fib_node_index_t path_index) |
| 1551 | { |
| 1552 | fib_path_t *path; |
| 1553 | |
| 1554 | path = fib_path_get(path_index); |
| 1555 | |
| 1556 | /* |
| 1557 | * hope for the best. |
| 1558 | */ |
| 1559 | path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RESOLVED; |
| 1560 | |
| 1561 | /* |
| 1562 | * the forced drop path resolves via the drop adj |
| 1563 | */ |
| 1564 | if (fib_path_is_permanent_drop(path)) |
| 1565 | { |
| 1566 | dpo_copy(&path->fp_dpo, |
| 1567 | drop_dpo_get(fib_proto_to_dpo(path->fp_nh_proto))); |
| 1568 | path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED; |
| 1569 | return (fib_path_is_resolved(path_index)); |
| 1570 | } |
| 1571 | |
| 1572 | switch (path->fp_type) |
| 1573 | { |
| 1574 | case FIB_PATH_TYPE_ATTACHED_NEXT_HOP: |
| 1575 | fib_path_attached_next_hop_set(path); |
| 1576 | break; |
| 1577 | case FIB_PATH_TYPE_ATTACHED: |
| 1578 | /* |
| 1579 | * path->attached.fp_interface |
| 1580 | */ |
| 1581 | if (!vnet_sw_interface_is_admin_up(vnet_get_main(), |
| 1582 | path->attached.fp_interface)) |
| 1583 | { |
| 1584 | path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED; |
| 1585 | } |
Neale Ranns | 8c4611b | 2017-05-23 03:43:47 -0700 | [diff] [blame] | 1586 | dpo_set(&path->fp_dpo, |
| 1587 | DPO_ADJACENCY, |
| 1588 | fib_proto_to_dpo(path->fp_nh_proto), |
| 1589 | fib_path_attached_get_adj(path, |
| 1590 | fib_proto_to_link(path->fp_nh_proto))); |
| 1591 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1592 | /* |
| 1593 | * become a child of the adjacency so we receive updates |
| 1594 | * when the interface state changes |
| 1595 | */ |
| 1596 | path->fp_sibling = adj_child_add(path->fp_dpo.dpoi_index, |
| 1597 | FIB_NODE_TYPE_PATH, |
| 1598 | fib_path_get_index(path)); |
| 1599 | |
| 1600 | break; |
| 1601 | case FIB_PATH_TYPE_RECURSIVE: |
| 1602 | { |
| 1603 | /* |
| 1604 | * Create a RR source entry in the table for the address |
| 1605 | * that this path recurses through. |
| 1606 | * This resolve action is recursive, hence we may create |
| 1607 | * more paths in the process. more creates mean maybe realloc |
| 1608 | * of this path. |
| 1609 | */ |
| 1610 | fib_node_index_t fei; |
| 1611 | fib_prefix_t pfx; |
| 1612 | |
| 1613 | ASSERT(FIB_NODE_INDEX_INVALID == path->fp_via_fib); |
| 1614 | |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 1615 | if (FIB_PROTOCOL_MPLS == path->fp_nh_proto) |
| 1616 | { |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1617 | fib_prefix_from_mpls_label(path->recursive.fp_nh.fp_local_label, |
| 1618 | path->recursive.fp_nh.fp_eos, |
| 1619 | &pfx); |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 1620 | } |
| 1621 | else |
| 1622 | { |
| 1623 | fib_prefix_from_ip46_addr(&path->recursive.fp_nh.fp_ip, &pfx); |
| 1624 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1625 | |
| 1626 | fei = fib_table_entry_special_add(path->recursive.fp_tbl_id, |
| 1627 | &pfx, |
| 1628 | FIB_SOURCE_RR, |
Neale Ranns | a055830 | 2017-04-13 00:44:52 -0700 | [diff] [blame] | 1629 | FIB_ENTRY_FLAG_NONE); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1630 | |
| 1631 | path = fib_path_get(path_index); |
| 1632 | path->fp_via_fib = fei; |
| 1633 | |
| 1634 | /* |
| 1635 | * become a dependent child of the entry so the path is |
| 1636 | * informed when the forwarding for the entry changes. |
| 1637 | */ |
| 1638 | path->fp_sibling = fib_entry_child_add(path->fp_via_fib, |
| 1639 | FIB_NODE_TYPE_PATH, |
| 1640 | fib_path_get_index(path)); |
| 1641 | |
| 1642 | /* |
| 1643 | * create and configure the IP DPO |
| 1644 | */ |
| 1645 | fib_path_recursive_adj_update( |
| 1646 | path, |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1647 | fib_path_to_chain_type(path), |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1648 | &path->fp_dpo); |
| 1649 | |
| 1650 | break; |
| 1651 | } |
| 1652 | case FIB_PATH_TYPE_SPECIAL: |
| 1653 | /* |
| 1654 | * Resolve via the drop |
| 1655 | */ |
| 1656 | dpo_copy(&path->fp_dpo, |
| 1657 | drop_dpo_get(fib_proto_to_dpo(path->fp_nh_proto))); |
| 1658 | break; |
| 1659 | case FIB_PATH_TYPE_DEAG: |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1660 | { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1661 | /* |
| 1662 | * Resolve via a lookup DPO. |
| 1663 | * FIXME. control plane should add routes with a table ID |
| 1664 | */ |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1665 | lookup_cast_t cast; |
| 1666 | |
| 1667 | cast = (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_RPF_ID ? |
| 1668 | LOOKUP_MULTICAST : |
| 1669 | LOOKUP_UNICAST); |
| 1670 | |
| 1671 | lookup_dpo_add_or_lock_w_fib_index(path->deag.fp_tbl_id, |
| 1672 | fib_proto_to_dpo(path->fp_nh_proto), |
| 1673 | cast, |
| 1674 | LOOKUP_INPUT_DST_ADDR, |
| 1675 | LOOKUP_TABLE_FROM_CONFIG, |
| 1676 | &path->fp_dpo); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1677 | break; |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1678 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1679 | case FIB_PATH_TYPE_RECEIVE: |
| 1680 | /* |
| 1681 | * Resolve via a receive DPO. |
| 1682 | */ |
| 1683 | receive_dpo_add_or_lock(fib_proto_to_dpo(path->fp_nh_proto), |
| 1684 | path->receive.fp_interface, |
| 1685 | &path->receive.fp_addr, |
| 1686 | &path->fp_dpo); |
| 1687 | break; |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1688 | case FIB_PATH_TYPE_INTF_RX: { |
| 1689 | /* |
| 1690 | * Resolve via a receive DPO. |
| 1691 | */ |
| 1692 | interface_dpo_add_or_lock(fib_proto_to_dpo(path->fp_nh_proto), |
| 1693 | path->intf_rx.fp_interface, |
| 1694 | &path->fp_dpo); |
| 1695 | break; |
| 1696 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1697 | case FIB_PATH_TYPE_EXCLUSIVE: |
| 1698 | /* |
| 1699 | * Resolve via the user provided DPO |
| 1700 | */ |
| 1701 | dpo_copy(&path->fp_dpo, &path->exclusive.fp_ex_dpo); |
| 1702 | break; |
| 1703 | } |
| 1704 | |
| 1705 | return (fib_path_is_resolved(path_index)); |
| 1706 | } |
| 1707 | |
| 1708 | u32 |
| 1709 | fib_path_get_resolving_interface (fib_node_index_t path_index) |
| 1710 | { |
| 1711 | fib_path_t *path; |
| 1712 | |
| 1713 | path = fib_path_get(path_index); |
| 1714 | |
| 1715 | switch (path->fp_type) |
| 1716 | { |
| 1717 | case FIB_PATH_TYPE_ATTACHED_NEXT_HOP: |
| 1718 | return (path->attached_next_hop.fp_interface); |
| 1719 | case FIB_PATH_TYPE_ATTACHED: |
| 1720 | return (path->attached.fp_interface); |
| 1721 | case FIB_PATH_TYPE_RECEIVE: |
| 1722 | return (path->receive.fp_interface); |
| 1723 | case FIB_PATH_TYPE_RECURSIVE: |
Neale Ranns | 08b1648 | 2017-05-13 05:52:58 -0700 | [diff] [blame] | 1724 | if (fib_path_is_resolved(path_index)) |
| 1725 | { |
| 1726 | return (fib_entry_get_resolving_interface(path->fp_via_fib)); |
| 1727 | } |
| 1728 | break; |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1729 | case FIB_PATH_TYPE_INTF_RX: |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1730 | case FIB_PATH_TYPE_SPECIAL: |
| 1731 | case FIB_PATH_TYPE_DEAG: |
| 1732 | case FIB_PATH_TYPE_EXCLUSIVE: |
| 1733 | break; |
| 1734 | } |
| 1735 | return (~0); |
| 1736 | } |
| 1737 | |
| 1738 | adj_index_t |
| 1739 | fib_path_get_adj (fib_node_index_t path_index) |
| 1740 | { |
| 1741 | fib_path_t *path; |
| 1742 | |
| 1743 | path = fib_path_get(path_index); |
| 1744 | |
| 1745 | ASSERT(dpo_is_adj(&path->fp_dpo)); |
| 1746 | if (dpo_is_adj(&path->fp_dpo)) |
| 1747 | { |
| 1748 | return (path->fp_dpo.dpoi_index); |
| 1749 | } |
| 1750 | return (ADJ_INDEX_INVALID); |
| 1751 | } |
| 1752 | |
| 1753 | int |
| 1754 | fib_path_get_weight (fib_node_index_t path_index) |
| 1755 | { |
| 1756 | fib_path_t *path; |
| 1757 | |
| 1758 | path = fib_path_get(path_index); |
| 1759 | |
| 1760 | ASSERT(path); |
| 1761 | |
| 1762 | return (path->fp_weight); |
| 1763 | } |
| 1764 | |
Neale Ranns | 3ee4404 | 2016-10-03 13:05:48 +0100 | [diff] [blame] | 1765 | /** |
| 1766 | * @brief Contribute the path's adjacency to the list passed. |
| 1767 | * By calling this function over all paths, recursively, a child |
| 1768 | * can construct its full set of forwarding adjacencies, and hence its |
| 1769 | * uRPF list. |
| 1770 | */ |
| 1771 | void |
| 1772 | fib_path_contribute_urpf (fib_node_index_t path_index, |
| 1773 | index_t urpf) |
| 1774 | { |
| 1775 | fib_path_t *path; |
| 1776 | |
Neale Ranns | 3ee4404 | 2016-10-03 13:05:48 +0100 | [diff] [blame] | 1777 | path = fib_path_get(path_index); |
| 1778 | |
Neale Ranns | 88fc83e | 2017-04-05 08:11:14 -0700 | [diff] [blame] | 1779 | /* |
| 1780 | * resolved and unresolved paths contribute to the RPF list. |
| 1781 | */ |
Neale Ranns | 3ee4404 | 2016-10-03 13:05:48 +0100 | [diff] [blame] | 1782 | switch (path->fp_type) |
| 1783 | { |
| 1784 | case FIB_PATH_TYPE_ATTACHED_NEXT_HOP: |
| 1785 | fib_urpf_list_append(urpf, path->attached_next_hop.fp_interface); |
| 1786 | break; |
| 1787 | |
| 1788 | case FIB_PATH_TYPE_ATTACHED: |
| 1789 | fib_urpf_list_append(urpf, path->attached.fp_interface); |
| 1790 | break; |
| 1791 | |
| 1792 | case FIB_PATH_TYPE_RECURSIVE: |
Neale Ranns | 08b1648 | 2017-05-13 05:52:58 -0700 | [diff] [blame] | 1793 | if (FIB_NODE_INDEX_INVALID != path->fp_via_fib && |
| 1794 | !fib_path_is_looped(path_index)) |
Neale Ranns | 88fc83e | 2017-04-05 08:11:14 -0700 | [diff] [blame] | 1795 | { |
| 1796 | /* |
| 1797 | * there's unresolved due to constraints, and there's unresolved |
Neale Ranns | 08b1648 | 2017-05-13 05:52:58 -0700 | [diff] [blame] | 1798 | * 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] | 1799 | */ |
| 1800 | fib_entry_contribute_urpf(path->fp_via_fib, urpf); |
| 1801 | } |
Neale Ranns | 3ee4404 | 2016-10-03 13:05:48 +0100 | [diff] [blame] | 1802 | break; |
| 1803 | |
| 1804 | case FIB_PATH_TYPE_EXCLUSIVE: |
| 1805 | case FIB_PATH_TYPE_SPECIAL: |
| 1806 | /* |
| 1807 | * these path types may link to an adj, if that's what |
| 1808 | * the clinet gave |
| 1809 | */ |
| 1810 | if (dpo_is_adj(&path->fp_dpo)) |
| 1811 | { |
| 1812 | ip_adjacency_t *adj; |
| 1813 | |
| 1814 | adj = adj_get(path->fp_dpo.dpoi_index); |
| 1815 | |
| 1816 | fib_urpf_list_append(urpf, adj->rewrite_header.sw_if_index); |
| 1817 | } |
| 1818 | break; |
| 1819 | |
| 1820 | case FIB_PATH_TYPE_DEAG: |
| 1821 | case FIB_PATH_TYPE_RECEIVE: |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1822 | case FIB_PATH_TYPE_INTF_RX: |
Neale Ranns | 3ee4404 | 2016-10-03 13:05:48 +0100 | [diff] [blame] | 1823 | /* |
| 1824 | * these path types don't link to an adj |
| 1825 | */ |
| 1826 | break; |
| 1827 | } |
| 1828 | } |
| 1829 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1830 | void |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1831 | fib_path_stack_mpls_disp (fib_node_index_t path_index, |
| 1832 | dpo_proto_t payload_proto, |
| 1833 | dpo_id_t *dpo) |
| 1834 | { |
| 1835 | fib_path_t *path; |
| 1836 | |
| 1837 | path = fib_path_get(path_index); |
| 1838 | |
| 1839 | ASSERT(path); |
| 1840 | |
| 1841 | switch (path->fp_type) |
| 1842 | { |
| 1843 | case FIB_PATH_TYPE_DEAG: |
| 1844 | { |
| 1845 | dpo_id_t tmp = DPO_INVALID; |
| 1846 | |
| 1847 | dpo_copy(&tmp, dpo); |
| 1848 | dpo_set(dpo, |
| 1849 | DPO_MPLS_DISPOSITION, |
| 1850 | payload_proto, |
| 1851 | mpls_disp_dpo_create(payload_proto, |
| 1852 | path->deag.fp_rpf_id, |
| 1853 | &tmp)); |
| 1854 | dpo_reset(&tmp); |
| 1855 | break; |
| 1856 | } |
| 1857 | case FIB_PATH_TYPE_RECEIVE: |
| 1858 | case FIB_PATH_TYPE_ATTACHED: |
| 1859 | case FIB_PATH_TYPE_ATTACHED_NEXT_HOP: |
| 1860 | case FIB_PATH_TYPE_RECURSIVE: |
| 1861 | case FIB_PATH_TYPE_INTF_RX: |
| 1862 | case FIB_PATH_TYPE_EXCLUSIVE: |
| 1863 | case FIB_PATH_TYPE_SPECIAL: |
| 1864 | break; |
| 1865 | } |
| 1866 | } |
| 1867 | |
| 1868 | void |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1869 | fib_path_contribute_forwarding (fib_node_index_t path_index, |
| 1870 | fib_forward_chain_type_t fct, |
| 1871 | dpo_id_t *dpo) |
| 1872 | { |
| 1873 | fib_path_t *path; |
| 1874 | |
| 1875 | path = fib_path_get(path_index); |
| 1876 | |
| 1877 | ASSERT(path); |
| 1878 | ASSERT(FIB_FORW_CHAIN_TYPE_MPLS_EOS != fct); |
| 1879 | |
| 1880 | FIB_PATH_DBG(path, "contribute"); |
| 1881 | |
| 1882 | /* |
| 1883 | * The DPO stored in the path was created when the path was resolved. |
| 1884 | * This then represents the path's 'native' protocol; IP. |
| 1885 | * For all others will need to go find something else. |
| 1886 | */ |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1887 | if (fib_path_to_chain_type(path) == fct) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1888 | { |
| 1889 | dpo_copy(dpo, &path->fp_dpo); |
| 1890 | } |
Neale Ranns | 5e575b1 | 2016-10-03 09:40:25 +0100 | [diff] [blame] | 1891 | else |
| 1892 | { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1893 | switch (path->fp_type) |
| 1894 | { |
| 1895 | case FIB_PATH_TYPE_ATTACHED_NEXT_HOP: |
| 1896 | switch (fct) |
| 1897 | { |
| 1898 | case FIB_FORW_CHAIN_TYPE_UNICAST_IP4: |
| 1899 | case FIB_FORW_CHAIN_TYPE_UNICAST_IP6: |
| 1900 | case FIB_FORW_CHAIN_TYPE_MPLS_EOS: |
| 1901 | case FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS: |
Neale Ranns | 5e575b1 | 2016-10-03 09:40:25 +0100 | [diff] [blame] | 1902 | case FIB_FORW_CHAIN_TYPE_ETHERNET: |
Florin Coras | ce1b4c7 | 2017-01-26 14:25:34 -0800 | [diff] [blame] | 1903 | case FIB_FORW_CHAIN_TYPE_NSH: |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1904 | { |
| 1905 | adj_index_t ai; |
| 1906 | |
| 1907 | /* |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 1908 | * get a appropriate link type adj. |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1909 | */ |
| 1910 | ai = fib_path_attached_next_hop_get_adj( |
| 1911 | path, |
| 1912 | fib_forw_chain_type_to_link_type(fct)); |
| 1913 | dpo_set(dpo, DPO_ADJACENCY, |
| 1914 | fib_forw_chain_type_to_dpo_proto(fct), ai); |
| 1915 | adj_unlock(ai); |
| 1916 | |
| 1917 | break; |
| 1918 | } |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 1919 | case FIB_FORW_CHAIN_TYPE_MCAST_IP4: |
| 1920 | case FIB_FORW_CHAIN_TYPE_MCAST_IP6: |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1921 | break; |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 1922 | } |
| 1923 | break; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1924 | case FIB_PATH_TYPE_RECURSIVE: |
| 1925 | switch (fct) |
| 1926 | { |
| 1927 | case FIB_FORW_CHAIN_TYPE_MPLS_EOS: |
| 1928 | case FIB_FORW_CHAIN_TYPE_UNICAST_IP4: |
| 1929 | case FIB_FORW_CHAIN_TYPE_UNICAST_IP6: |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1930 | case FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS: |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 1931 | case FIB_FORW_CHAIN_TYPE_MCAST_IP4: |
| 1932 | case FIB_FORW_CHAIN_TYPE_MCAST_IP6: |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1933 | fib_path_recursive_adj_update(path, fct, dpo); |
| 1934 | break; |
Neale Ranns | 5e575b1 | 2016-10-03 09:40:25 +0100 | [diff] [blame] | 1935 | case FIB_FORW_CHAIN_TYPE_ETHERNET: |
Florin Coras | ce1b4c7 | 2017-01-26 14:25:34 -0800 | [diff] [blame] | 1936 | case FIB_FORW_CHAIN_TYPE_NSH: |
Neale Ranns | 5e575b1 | 2016-10-03 09:40:25 +0100 | [diff] [blame] | 1937 | ASSERT(0); |
| 1938 | break; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1939 | } |
| 1940 | break; |
| 1941 | case FIB_PATH_TYPE_DEAG: |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 1942 | switch (fct) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1943 | { |
| 1944 | case FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS: |
| 1945 | lookup_dpo_add_or_lock_w_table_id(MPLS_FIB_DEFAULT_TABLE_ID, |
| 1946 | DPO_PROTO_MPLS, |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1947 | LOOKUP_UNICAST, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1948 | LOOKUP_INPUT_DST_ADDR, |
| 1949 | LOOKUP_TABLE_FROM_CONFIG, |
| 1950 | dpo); |
| 1951 | break; |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 1952 | case FIB_FORW_CHAIN_TYPE_MPLS_EOS: |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1953 | case FIB_FORW_CHAIN_TYPE_UNICAST_IP4: |
| 1954 | case FIB_FORW_CHAIN_TYPE_UNICAST_IP6: |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1955 | dpo_copy(dpo, &path->fp_dpo); |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 1956 | break; |
| 1957 | case FIB_FORW_CHAIN_TYPE_MCAST_IP4: |
| 1958 | case FIB_FORW_CHAIN_TYPE_MCAST_IP6: |
Neale Ranns | 5e575b1 | 2016-10-03 09:40:25 +0100 | [diff] [blame] | 1959 | case FIB_FORW_CHAIN_TYPE_ETHERNET: |
Florin Coras | ce1b4c7 | 2017-01-26 14:25:34 -0800 | [diff] [blame] | 1960 | case FIB_FORW_CHAIN_TYPE_NSH: |
Neale Ranns | 5e575b1 | 2016-10-03 09:40:25 +0100 | [diff] [blame] | 1961 | ASSERT(0); |
| 1962 | break; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1963 | } |
| 1964 | break; |
| 1965 | case FIB_PATH_TYPE_EXCLUSIVE: |
| 1966 | dpo_copy(dpo, &path->exclusive.fp_ex_dpo); |
| 1967 | break; |
| 1968 | case FIB_PATH_TYPE_ATTACHED: |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 1969 | switch (fct) |
| 1970 | { |
| 1971 | case FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS: |
| 1972 | case FIB_FORW_CHAIN_TYPE_UNICAST_IP4: |
| 1973 | case FIB_FORW_CHAIN_TYPE_UNICAST_IP6: |
| 1974 | case FIB_FORW_CHAIN_TYPE_MPLS_EOS: |
| 1975 | case FIB_FORW_CHAIN_TYPE_ETHERNET: |
Florin Coras | ce1b4c7 | 2017-01-26 14:25:34 -0800 | [diff] [blame] | 1976 | case FIB_FORW_CHAIN_TYPE_NSH: |
Neale Ranns | 8c4611b | 2017-05-23 03:43:47 -0700 | [diff] [blame] | 1977 | { |
| 1978 | adj_index_t ai; |
| 1979 | |
| 1980 | /* |
| 1981 | * get a appropriate link type adj. |
| 1982 | */ |
| 1983 | ai = fib_path_attached_get_adj( |
| 1984 | path, |
| 1985 | fib_forw_chain_type_to_link_type(fct)); |
| 1986 | dpo_set(dpo, DPO_ADJACENCY, |
| 1987 | fib_forw_chain_type_to_dpo_proto(fct), ai); |
| 1988 | adj_unlock(ai); |
| 1989 | break; |
| 1990 | } |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 1991 | case FIB_FORW_CHAIN_TYPE_MCAST_IP4: |
| 1992 | case FIB_FORW_CHAIN_TYPE_MCAST_IP6: |
| 1993 | { |
| 1994 | adj_index_t ai; |
| 1995 | |
| 1996 | /* |
| 1997 | * Create the adj needed for sending IP multicast traffic |
| 1998 | */ |
| 1999 | ai = adj_mcast_add_or_lock(path->fp_nh_proto, |
| 2000 | fib_forw_chain_type_to_link_type(fct), |
| 2001 | path->attached.fp_interface); |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 2002 | dpo_set(dpo, DPO_ADJACENCY, |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 2003 | fib_forw_chain_type_to_dpo_proto(fct), |
| 2004 | ai); |
| 2005 | adj_unlock(ai); |
| 2006 | } |
| 2007 | break; |
| 2008 | } |
| 2009 | break; |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 2010 | case FIB_PATH_TYPE_INTF_RX: |
| 2011 | /* |
| 2012 | * Create the adj needed for sending IP multicast traffic |
| 2013 | */ |
| 2014 | interface_dpo_add_or_lock(fib_forw_chain_type_to_dpo_proto(fct), |
| 2015 | path->attached.fp_interface, |
| 2016 | dpo); |
| 2017 | break; |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 2018 | case FIB_PATH_TYPE_RECEIVE: |
| 2019 | case FIB_PATH_TYPE_SPECIAL: |
| 2020 | dpo_copy(dpo, &path->fp_dpo); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2021 | break; |
| 2022 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2023 | } |
| 2024 | } |
| 2025 | |
| 2026 | load_balance_path_t * |
| 2027 | fib_path_append_nh_for_multipath_hash (fib_node_index_t path_index, |
| 2028 | fib_forward_chain_type_t fct, |
| 2029 | load_balance_path_t *hash_key) |
| 2030 | { |
| 2031 | load_balance_path_t *mnh; |
| 2032 | fib_path_t *path; |
| 2033 | |
| 2034 | path = fib_path_get(path_index); |
| 2035 | |
| 2036 | ASSERT(path); |
| 2037 | |
| 2038 | if (fib_path_is_resolved(path_index)) |
| 2039 | { |
| 2040 | vec_add2(hash_key, mnh, 1); |
| 2041 | |
| 2042 | mnh->path_weight = path->fp_weight; |
| 2043 | mnh->path_index = path_index; |
Neale Ranns | 5e575b1 | 2016-10-03 09:40:25 +0100 | [diff] [blame] | 2044 | fib_path_contribute_forwarding(path_index, fct, &mnh->path_dpo); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2045 | } |
| 2046 | |
| 2047 | return (hash_key); |
| 2048 | } |
| 2049 | |
| 2050 | int |
Neale Ranns | f12a83f | 2017-04-18 09:09:40 -0700 | [diff] [blame] | 2051 | fib_path_is_recursive_constrained (fib_node_index_t path_index) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2052 | { |
| 2053 | fib_path_t *path; |
| 2054 | |
| 2055 | path = fib_path_get(path_index); |
| 2056 | |
Neale Ranns | f12a83f | 2017-04-18 09:09:40 -0700 | [diff] [blame] | 2057 | return ((FIB_PATH_TYPE_RECURSIVE == path->fp_type) && |
| 2058 | ((path->fp_cfg_flags & FIB_PATH_CFG_FLAG_RESOLVE_ATTACHED) || |
| 2059 | (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_RESOLVE_HOST))); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2060 | } |
| 2061 | |
| 2062 | int |
| 2063 | fib_path_is_exclusive (fib_node_index_t path_index) |
| 2064 | { |
| 2065 | fib_path_t *path; |
| 2066 | |
| 2067 | path = fib_path_get(path_index); |
| 2068 | |
| 2069 | return (FIB_PATH_TYPE_EXCLUSIVE == path->fp_type); |
| 2070 | } |
| 2071 | |
| 2072 | int |
| 2073 | fib_path_is_deag (fib_node_index_t path_index) |
| 2074 | { |
| 2075 | fib_path_t *path; |
| 2076 | |
| 2077 | path = fib_path_get(path_index); |
| 2078 | |
| 2079 | return (FIB_PATH_TYPE_DEAG == path->fp_type); |
| 2080 | } |
| 2081 | |
| 2082 | int |
| 2083 | fib_path_is_resolved (fib_node_index_t path_index) |
| 2084 | { |
| 2085 | fib_path_t *path; |
| 2086 | |
| 2087 | path = fib_path_get(path_index); |
| 2088 | |
| 2089 | return (dpo_id_is_valid(&path->fp_dpo) && |
| 2090 | (path->fp_oper_flags & FIB_PATH_OPER_FLAG_RESOLVED) && |
| 2091 | !fib_path_is_looped(path_index) && |
| 2092 | !fib_path_is_permanent_drop(path)); |
| 2093 | } |
| 2094 | |
| 2095 | int |
| 2096 | fib_path_is_looped (fib_node_index_t path_index) |
| 2097 | { |
| 2098 | fib_path_t *path; |
| 2099 | |
| 2100 | path = fib_path_get(path_index); |
| 2101 | |
| 2102 | return (path->fp_oper_flags & FIB_PATH_OPER_FLAG_RECURSIVE_LOOP); |
| 2103 | } |
| 2104 | |
Neale Ranns | 8142499 | 2017-05-18 03:03:22 -0700 | [diff] [blame] | 2105 | fib_path_list_walk_rc_t |
Steven | 01b0712 | 2016-11-02 10:40:09 -0700 | [diff] [blame] | 2106 | fib_path_encode (fib_node_index_t path_list_index, |
| 2107 | fib_node_index_t path_index, |
| 2108 | void *ctx) |
| 2109 | { |
| 2110 | fib_route_path_encode_t **api_rpaths = ctx; |
| 2111 | fib_route_path_encode_t *api_rpath; |
| 2112 | fib_path_t *path; |
| 2113 | |
| 2114 | path = fib_path_get(path_index); |
| 2115 | if (!path) |
Neale Ranns | 8142499 | 2017-05-18 03:03:22 -0700 | [diff] [blame] | 2116 | return (FIB_PATH_LIST_WALK_CONTINUE); |
Steven | 01b0712 | 2016-11-02 10:40:09 -0700 | [diff] [blame] | 2117 | vec_add2(*api_rpaths, api_rpath, 1); |
| 2118 | api_rpath->rpath.frp_weight = path->fp_weight; |
| 2119 | api_rpath->rpath.frp_proto = path->fp_nh_proto; |
| 2120 | api_rpath->rpath.frp_sw_if_index = ~0; |
| 2121 | api_rpath->dpo = path->exclusive.fp_ex_dpo; |
| 2122 | switch (path->fp_type) |
| 2123 | { |
| 2124 | case FIB_PATH_TYPE_RECEIVE: |
| 2125 | api_rpath->rpath.frp_addr = path->receive.fp_addr; |
| 2126 | api_rpath->rpath.frp_sw_if_index = path->receive.fp_interface; |
| 2127 | break; |
| 2128 | case FIB_PATH_TYPE_ATTACHED: |
| 2129 | api_rpath->rpath.frp_sw_if_index = path->attached.fp_interface; |
| 2130 | break; |
| 2131 | case FIB_PATH_TYPE_ATTACHED_NEXT_HOP: |
| 2132 | api_rpath->rpath.frp_sw_if_index = path->attached_next_hop.fp_interface; |
| 2133 | api_rpath->rpath.frp_addr = path->attached_next_hop.fp_nh; |
| 2134 | break; |
| 2135 | case FIB_PATH_TYPE_SPECIAL: |
| 2136 | break; |
| 2137 | case FIB_PATH_TYPE_DEAG: |
| 2138 | break; |
| 2139 | case FIB_PATH_TYPE_RECURSIVE: |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 2140 | api_rpath->rpath.frp_addr = path->recursive.fp_nh.fp_ip; |
Steven | 01b0712 | 2016-11-02 10:40:09 -0700 | [diff] [blame] | 2141 | break; |
| 2142 | default: |
| 2143 | break; |
| 2144 | } |
Neale Ranns | 8142499 | 2017-05-18 03:03:22 -0700 | [diff] [blame] | 2145 | return (FIB_PATH_LIST_WALK_CONTINUE); |
Steven | 01b0712 | 2016-11-02 10:40:09 -0700 | [diff] [blame] | 2146 | } |
| 2147 | |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 2148 | fib_protocol_t |
| 2149 | fib_path_get_proto (fib_node_index_t path_index) |
| 2150 | { |
| 2151 | fib_path_t *path; |
| 2152 | |
| 2153 | path = fib_path_get(path_index); |
| 2154 | |
| 2155 | return (path->fp_nh_proto); |
| 2156 | } |
| 2157 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2158 | void |
| 2159 | fib_path_module_init (void) |
| 2160 | { |
| 2161 | fib_node_register_type (FIB_NODE_TYPE_PATH, &fib_path_vft); |
| 2162 | } |
| 2163 | |
| 2164 | static clib_error_t * |
| 2165 | show_fib_path_command (vlib_main_t * vm, |
| 2166 | unformat_input_t * input, |
| 2167 | vlib_cli_command_t * cmd) |
| 2168 | { |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 2169 | fib_node_index_t pi; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2170 | fib_path_t *path; |
| 2171 | |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 2172 | if (unformat (input, "%d", &pi)) |
| 2173 | { |
| 2174 | /* |
| 2175 | * show one in detail |
| 2176 | */ |
| 2177 | if (!pool_is_free_index(fib_path_pool, pi)) |
| 2178 | { |
| 2179 | path = fib_path_get(pi); |
| 2180 | u8 *s = fib_path_format(pi, NULL); |
| 2181 | s = format(s, "children:"); |
| 2182 | s = fib_node_children_format(path->fp_node.fn_children, s); |
| 2183 | vlib_cli_output (vm, "%s", s); |
| 2184 | vec_free(s); |
| 2185 | } |
| 2186 | else |
| 2187 | { |
| 2188 | vlib_cli_output (vm, "path %d invalid", pi); |
| 2189 | } |
| 2190 | } |
| 2191 | else |
| 2192 | { |
| 2193 | vlib_cli_output (vm, "FIB Paths"); |
| 2194 | pool_foreach(path, fib_path_pool, |
| 2195 | ({ |
| 2196 | vlib_cli_output (vm, "%U", format_fib_path, path); |
| 2197 | })); |
| 2198 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 2199 | |
| 2200 | return (NULL); |
| 2201 | } |
| 2202 | |
| 2203 | VLIB_CLI_COMMAND (show_fib_path, static) = { |
| 2204 | .path = "show fib paths", |
| 2205 | .function = show_fib_path_command, |
| 2206 | .short_help = "show fib paths", |
| 2207 | }; |