Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2016 Cisco and/or its affiliates. |
| 3 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | * you may not use this file except in compliance with the License. |
| 5 | * You may obtain a copy of the License at: |
| 6 | * |
| 7 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | * |
| 9 | * Unless required by applicable law or agreed to in writing, software |
| 10 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | * See the License for the specific language governing permissions and |
| 13 | * limitations under the License. |
| 14 | */ |
| 15 | |
| 16 | #include <vnet/adj/adj_nbr.h> |
| 17 | #include <vnet/adj/adj_internal.h> |
| 18 | #include <vnet/ethernet/arp_packet.h> |
| 19 | #include <vnet/fib/fib_walk.h> |
| 20 | |
| 21 | /* |
| 22 | * Vector Hash tables of neighbour (traditional) adjacencies |
| 23 | * Key: interface(for the vector index), address (and its proto), |
| 24 | * link-type/ether-type. |
| 25 | */ |
| 26 | static BVT(clib_bihash) **adj_nbr_tables[FIB_PROTOCOL_MAX]; |
| 27 | |
| 28 | // FIXME SIZE APPROPRIATELY. ASK DAVEB. |
| 29 | #define ADJ_NBR_DEFAULT_HASH_NUM_BUCKETS (64 * 64) |
| 30 | #define ADJ_NBR_DEFAULT_HASH_MEMORY_SIZE (32<<20) |
| 31 | |
| 32 | |
| 33 | #define ADJ_NBR_SET_KEY(_key, _lt, _nh) \ |
| 34 | { \ |
| 35 | _key.key[0] = (_nh)->as_u64[0]; \ |
| 36 | _key.key[1] = (_nh)->as_u64[1]; \ |
| 37 | _key.key[2] = (_lt); \ |
| 38 | } |
| 39 | |
| 40 | #define ADJ_NBR_ITF_OK(_proto, _itf) \ |
| 41 | (((_itf) < vec_len(adj_nbr_tables[_proto])) && \ |
| 42 | (NULL != adj_nbr_tables[_proto][sw_if_index])) |
| 43 | |
| 44 | static void |
| 45 | adj_nbr_insert (fib_protocol_t nh_proto, |
Neale Ranns | 924d03a | 2016-10-19 08:25:46 +0100 | [diff] [blame] | 46 | vnet_link_t link_type, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 47 | const ip46_address_t *nh_addr, |
| 48 | u32 sw_if_index, |
| 49 | adj_index_t adj_index) |
| 50 | { |
| 51 | BVT(clib_bihash_kv) kv; |
| 52 | |
| 53 | if (sw_if_index >= vec_len(adj_nbr_tables[nh_proto])) |
| 54 | { |
| 55 | vec_validate(adj_nbr_tables[nh_proto], sw_if_index); |
| 56 | } |
| 57 | if (NULL == adj_nbr_tables[nh_proto][sw_if_index]) |
| 58 | { |
| 59 | adj_nbr_tables[nh_proto][sw_if_index] = |
| 60 | clib_mem_alloc_aligned(sizeof(BVT(clib_bihash)), |
| 61 | CLIB_CACHE_LINE_BYTES); |
| 62 | memset(adj_nbr_tables[nh_proto][sw_if_index], |
| 63 | 0, |
| 64 | sizeof(BVT(clib_bihash))); |
| 65 | |
| 66 | BV(clib_bihash_init) (adj_nbr_tables[nh_proto][sw_if_index], |
| 67 | "Adjacency Neighbour table", |
| 68 | ADJ_NBR_DEFAULT_HASH_NUM_BUCKETS, |
| 69 | ADJ_NBR_DEFAULT_HASH_MEMORY_SIZE); |
| 70 | } |
| 71 | |
| 72 | ADJ_NBR_SET_KEY(kv, link_type, nh_addr); |
| 73 | kv.value = adj_index; |
| 74 | |
| 75 | BV(clib_bihash_add_del) (adj_nbr_tables[nh_proto][sw_if_index], &kv, 1); |
| 76 | } |
| 77 | |
| 78 | void |
Neale Ranns | 177bbdc | 2016-11-15 09:46:51 +0000 | [diff] [blame] | 79 | adj_nbr_remove (adj_index_t ai, |
| 80 | fib_protocol_t nh_proto, |
Neale Ranns | 924d03a | 2016-10-19 08:25:46 +0100 | [diff] [blame] | 81 | vnet_link_t link_type, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 82 | const ip46_address_t *nh_addr, |
| 83 | u32 sw_if_index) |
| 84 | { |
| 85 | BVT(clib_bihash_kv) kv; |
| 86 | |
| 87 | if (!ADJ_NBR_ITF_OK(nh_proto, sw_if_index)) |
| 88 | return; |
| 89 | |
| 90 | ADJ_NBR_SET_KEY(kv, link_type, nh_addr); |
Neale Ranns | 177bbdc | 2016-11-15 09:46:51 +0000 | [diff] [blame] | 91 | kv.value = ai; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 92 | |
| 93 | BV(clib_bihash_add_del) (adj_nbr_tables[nh_proto][sw_if_index], &kv, 0); |
| 94 | } |
| 95 | |
| 96 | static adj_index_t |
| 97 | adj_nbr_find (fib_protocol_t nh_proto, |
Neale Ranns | 924d03a | 2016-10-19 08:25:46 +0100 | [diff] [blame] | 98 | vnet_link_t link_type, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 99 | const ip46_address_t *nh_addr, |
| 100 | u32 sw_if_index) |
| 101 | { |
| 102 | BVT(clib_bihash_kv) kv; |
| 103 | |
| 104 | ADJ_NBR_SET_KEY(kv, link_type, nh_addr); |
| 105 | |
| 106 | if (!ADJ_NBR_ITF_OK(nh_proto, sw_if_index)) |
| 107 | return (ADJ_INDEX_INVALID); |
| 108 | |
| 109 | if (BV(clib_bihash_search)(adj_nbr_tables[nh_proto][sw_if_index], |
| 110 | &kv, &kv) < 0) |
| 111 | { |
| 112 | return (ADJ_INDEX_INVALID); |
| 113 | } |
| 114 | else |
| 115 | { |
| 116 | return (kv.value); |
| 117 | } |
| 118 | } |
| 119 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 120 | static inline u32 |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 121 | adj_get_nd_node (fib_protocol_t proto) |
| 122 | { |
| 123 | switch (proto) { |
| 124 | case FIB_PROTOCOL_IP4: |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 125 | return (ip4_arp_node.index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 126 | case FIB_PROTOCOL_IP6: |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 127 | return (ip6_discover_neighbor_node.index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 128 | case FIB_PROTOCOL_MPLS: |
| 129 | break; |
| 130 | } |
| 131 | ASSERT(0); |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 132 | return (ip4_arp_node.index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 133 | } |
| 134 | |
AkshayaNadahalli | 17f5f60 | 2017-03-27 14:47:41 +0530 | [diff] [blame] | 135 | /** |
| 136 | * @brief Check and set feature flags if o/p interface has any o/p features. |
| 137 | */ |
| 138 | static void |
| 139 | adj_nbr_evaluate_feature (adj_index_t ai) |
| 140 | { |
| 141 | ip_adjacency_t *adj; |
| 142 | vnet_feature_main_t *fm = &feature_main; |
| 143 | i16 feature_count; |
| 144 | u8 arc_index; |
| 145 | u32 sw_if_index; |
| 146 | |
| 147 | adj = adj_get(ai); |
| 148 | |
| 149 | switch (adj->ia_link) |
| 150 | { |
| 151 | case VNET_LINK_IP4: |
| 152 | arc_index = ip4_main.lookup_main.output_feature_arc_index; |
| 153 | break; |
| 154 | case VNET_LINK_IP6: |
| 155 | arc_index = ip6_main.lookup_main.output_feature_arc_index; |
| 156 | break; |
| 157 | case VNET_LINK_MPLS: |
| 158 | arc_index = mpls_main.output_feature_arc_index; |
| 159 | break; |
| 160 | default: |
| 161 | return; |
| 162 | } |
| 163 | |
| 164 | sw_if_index = adj->rewrite_header.sw_if_index; |
AkshayaNadahalli | 98ab091 | 2017-03-27 17:21:05 +0000 | [diff] [blame] | 165 | if (vec_len(fm->feature_count_by_sw_if_index[arc_index]) > sw_if_index) |
| 166 | { |
| 167 | feature_count = fm->feature_count_by_sw_if_index[arc_index][sw_if_index]; |
| 168 | if (feature_count > 0) |
| 169 | adj->rewrite_header.flags |= VNET_REWRITE_HAS_FEATURES; |
| 170 | } |
AkshayaNadahalli | 17f5f60 | 2017-03-27 14:47:41 +0530 | [diff] [blame] | 171 | |
| 172 | return; |
| 173 | } |
| 174 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 175 | static ip_adjacency_t* |
| 176 | adj_nbr_alloc (fib_protocol_t nh_proto, |
Neale Ranns | 924d03a | 2016-10-19 08:25:46 +0100 | [diff] [blame] | 177 | vnet_link_t link_type, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 178 | const ip46_address_t *nh_addr, |
| 179 | u32 sw_if_index) |
| 180 | { |
| 181 | ip_adjacency_t *adj; |
| 182 | |
| 183 | adj = adj_alloc(nh_proto); |
| 184 | |
| 185 | adj_nbr_insert(nh_proto, link_type, nh_addr, |
| 186 | sw_if_index, |
Neale Ranns | 6c3ebcc | 2016-10-02 21:20:15 +0100 | [diff] [blame] | 187 | adj_get_index(adj)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 188 | |
| 189 | /* |
| 190 | * since we just added the ADJ we have no rewrite string for it, |
| 191 | * so its for ARP |
| 192 | */ |
| 193 | adj->lookup_next_index = IP_LOOKUP_NEXT_ARP; |
| 194 | adj->sub_type.nbr.next_hop = *nh_addr; |
| 195 | adj->ia_link = link_type; |
| 196 | adj->ia_nh_proto = nh_proto; |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 197 | adj->rewrite_header.sw_if_index = sw_if_index; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 198 | |
AkshayaNadahalli | 17f5f60 | 2017-03-27 14:47:41 +0530 | [diff] [blame] | 199 | adj_nbr_evaluate_feature (adj_get_index(adj)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 200 | return (adj); |
| 201 | } |
| 202 | |
| 203 | /* |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 204 | * adj_nbr_add_or_lock |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 205 | * |
| 206 | * Add an adjacency for the neighbour requested. |
| 207 | * |
| 208 | * The key for an adj is: |
| 209 | * - the Next-hops protocol (i.e. v4 or v6) |
| 210 | * - the address of the next-hop |
| 211 | * - the interface the next-hop is reachable through |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 212 | */ |
| 213 | adj_index_t |
| 214 | adj_nbr_add_or_lock (fib_protocol_t nh_proto, |
Neale Ranns | 924d03a | 2016-10-19 08:25:46 +0100 | [diff] [blame] | 215 | vnet_link_t link_type, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 216 | const ip46_address_t *nh_addr, |
| 217 | u32 sw_if_index) |
| 218 | { |
| 219 | adj_index_t adj_index; |
| 220 | ip_adjacency_t *adj; |
| 221 | |
| 222 | adj_index = adj_nbr_find(nh_proto, link_type, nh_addr, sw_if_index); |
| 223 | |
| 224 | if (ADJ_INDEX_INVALID == adj_index) |
| 225 | { |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 226 | vnet_main_t *vnm; |
| 227 | |
| 228 | vnm = vnet_get_main(); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 229 | adj = adj_nbr_alloc(nh_proto, link_type, nh_addr, sw_if_index); |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 230 | adj_index = adj_get_index(adj); |
| 231 | adj_lock(adj_index); |
| 232 | |
| 233 | vnet_rewrite_init(vnm, sw_if_index, |
| 234 | adj_get_nd_node(nh_proto), |
| 235 | vnet_tx_node_index_for_sw_interface(vnm, sw_if_index), |
| 236 | &adj->rewrite_header); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 237 | |
| 238 | /* |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 239 | * we need a rewrite where the destination IP address is converted |
| 240 | * to the appropriate link-layer address. This is interface specific. |
| 241 | * So ask the interface to do it. |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 242 | */ |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 243 | vnet_update_adjacency_for_sw_interface(vnm, sw_if_index, adj_index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 244 | } |
| 245 | else |
| 246 | { |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 247 | adj_lock(adj_index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 248 | } |
| 249 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 250 | return (adj_index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 251 | } |
| 252 | |
| 253 | adj_index_t |
| 254 | adj_nbr_add_or_lock_w_rewrite (fib_protocol_t nh_proto, |
Neale Ranns | 924d03a | 2016-10-19 08:25:46 +0100 | [diff] [blame] | 255 | vnet_link_t link_type, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 256 | const ip46_address_t *nh_addr, |
| 257 | u32 sw_if_index, |
| 258 | u8 *rewrite) |
| 259 | { |
| 260 | adj_index_t adj_index; |
| 261 | ip_adjacency_t *adj; |
| 262 | |
| 263 | adj_index = adj_nbr_find(nh_proto, link_type, nh_addr, sw_if_index); |
| 264 | |
| 265 | if (ADJ_INDEX_INVALID == adj_index) |
| 266 | { |
| 267 | adj = adj_nbr_alloc(nh_proto, link_type, nh_addr, sw_if_index); |
| 268 | adj->rewrite_header.sw_if_index = sw_if_index; |
| 269 | } |
| 270 | else |
| 271 | { |
| 272 | adj = adj_get(adj_index); |
| 273 | } |
| 274 | |
Neale Ranns | 6c3ebcc | 2016-10-02 21:20:15 +0100 | [diff] [blame] | 275 | adj_lock(adj_get_index(adj)); |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 276 | adj_nbr_update_rewrite(adj_get_index(adj), |
| 277 | ADJ_NBR_REWRITE_FLAG_COMPLETE, |
| 278 | rewrite); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 279 | |
Neale Ranns | 6c3ebcc | 2016-10-02 21:20:15 +0100 | [diff] [blame] | 280 | return (adj_get_index(adj)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 281 | } |
| 282 | |
| 283 | /** |
| 284 | * adj_nbr_update_rewrite |
| 285 | * |
| 286 | * Update the adjacency's rewrite string. A NULL string implies the |
| 287 | * rewirte is reset (i.e. when ARP/ND etnry is gone). |
| 288 | * NB: the adj being updated may be handling traffic in the DP. |
| 289 | */ |
| 290 | void |
| 291 | adj_nbr_update_rewrite (adj_index_t adj_index, |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 292 | adj_nbr_rewrite_flag_t flags, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 293 | u8 *rewrite) |
| 294 | { |
| 295 | ip_adjacency_t *adj; |
| 296 | |
| 297 | ASSERT(ADJ_INDEX_INVALID != adj_index); |
| 298 | |
| 299 | adj = adj_get(adj_index); |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 300 | |
| 301 | if (flags & ADJ_NBR_REWRITE_FLAG_COMPLETE) |
| 302 | { |
| 303 | /* |
| 304 | * update the adj's rewrite string and build the arc |
| 305 | * from the rewrite node to the interface's TX node |
| 306 | */ |
| 307 | adj_nbr_update_rewrite_internal(adj, IP_LOOKUP_NEXT_REWRITE, |
| 308 | adj_get_rewrite_node(adj->ia_link), |
| 309 | vnet_tx_node_index_for_sw_interface( |
| 310 | vnet_get_main(), |
| 311 | adj->rewrite_header.sw_if_index), |
| 312 | rewrite); |
| 313 | } |
| 314 | else |
| 315 | { |
| 316 | adj_nbr_update_rewrite_internal(adj, IP_LOOKUP_NEXT_ARP, |
| 317 | adj_get_nd_node(adj->ia_nh_proto), |
| 318 | vnet_tx_node_index_for_sw_interface( |
| 319 | vnet_get_main(), |
| 320 | adj->rewrite_header.sw_if_index), |
| 321 | rewrite); |
| 322 | } |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 323 | } |
| 324 | |
| 325 | /** |
| 326 | * adj_nbr_update_rewrite_internal |
| 327 | * |
| 328 | * Update the adjacency's rewrite string. A NULL string implies the |
| 329 | * rewirte is reset (i.e. when ARP/ND etnry is gone). |
| 330 | * NB: the adj being updated may be handling traffic in the DP. |
| 331 | */ |
| 332 | void |
| 333 | adj_nbr_update_rewrite_internal (ip_adjacency_t *adj, |
Neale Ranns | fa5d198 | 2017-02-20 14:19:51 -0800 | [diff] [blame] | 334 | ip_lookup_next_t adj_next_index, |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 335 | u32 this_node, |
| 336 | u32 next_node, |
| 337 | u8 *rewrite) |
| 338 | { |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 339 | ip_adjacency_t *walk_adj; |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 340 | adj_index_t walk_ai; |
| 341 | vlib_main_t * vm; |
| 342 | u32 old_next; |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 343 | int do_walk; |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 344 | |
| 345 | vm = vlib_get_main(); |
| 346 | old_next = adj->lookup_next_index; |
| 347 | |
| 348 | walk_ai = adj_get_index(adj); |
| 349 | if (VNET_LINK_MPLS == adj->ia_link) |
| 350 | { |
| 351 | /* |
| 352 | * The link type MPLS has no children in the control plane graph, it only |
| 353 | * has children in the data-palne graph. The backwalk is up the former. |
| 354 | * So we need to walk from its IP cousin. |
| 355 | */ |
| 356 | walk_ai = adj_nbr_find(adj->ia_nh_proto, |
| 357 | fib_proto_to_link(adj->ia_nh_proto), |
| 358 | &adj->sub_type.nbr.next_hop, |
| 359 | adj->rewrite_header.sw_if_index); |
| 360 | } |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 361 | |
| 362 | /* |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 363 | * Don't call the walk re-entrantly |
| 364 | */ |
| 365 | if (ADJ_INDEX_INVALID != walk_ai) |
| 366 | { |
| 367 | walk_adj = adj_get(walk_ai); |
Neale Ranns | fa5d198 | 2017-02-20 14:19:51 -0800 | [diff] [blame] | 368 | if (ADJ_FLAG_SYNC_WALK_ACTIVE & walk_adj->ia_flags) |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 369 | { |
| 370 | do_walk = 0; |
| 371 | } |
| 372 | else |
| 373 | { |
| 374 | /* |
| 375 | * Prevent re-entrant walk of the same adj |
| 376 | */ |
Neale Ranns | fa5d198 | 2017-02-20 14:19:51 -0800 | [diff] [blame] | 377 | walk_adj->ia_flags |= ADJ_FLAG_SYNC_WALK_ACTIVE; |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 378 | do_walk = 1; |
| 379 | } |
| 380 | } |
| 381 | else |
| 382 | { |
| 383 | do_walk = 0; |
| 384 | } |
| 385 | |
| 386 | /* |
| 387 | * lock the adjacencies that are affected by updates this walk will provoke. |
| 388 | * Since the aim of the walk is to update children to link to a different |
| 389 | * DPO, this adj will no longer be in use and its lock count will drop to 0. |
| 390 | * We don't want it to be deleted as part of this endevour. |
| 391 | */ |
| 392 | adj_lock(adj_get_index(adj)); |
| 393 | adj_lock(walk_ai); |
| 394 | |
| 395 | /* |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 396 | * Updating a rewrite string is not atomic; |
| 397 | * - the rewrite string is too long to write in one instruction |
| 398 | * - when swapping from incomplete to complete, we also need to update |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 399 | * the VLIB graph next-index of the adj. |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 400 | * ideally we would only want to suspend forwarding via this adj whilst we |
| 401 | * do this, but we do not have that level of granularity - it's suspend all |
| 402 | * worker threads or nothing. |
| 403 | * The other chioces are: |
| 404 | * - to mark the adj down and back walk so child load-balances drop this adj |
| 405 | * from the set. |
| 406 | * - update the next_node index of this adj to point to error-drop |
| 407 | * both of which will mean for MAC change we will drop for this adj |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 408 | * which is not acceptable. However, when the adj changes type (from |
| 409 | * complete to incomplete and vice-versa) the child DPOs, which have the |
| 410 | * VLIB graph next node index, will be sending packets to the wrong graph |
| 411 | * node. So from the options above, updating the next_node of the adj to |
| 412 | * be drop will work, but it relies on each graph node v4/v6/mpls, rewrite/ |
| 413 | * arp/midchain always be valid w.r.t. a mis-match of adj type and node type |
| 414 | * (i.e. a rewrite adj in the arp node). This is not enforcable. Getting it |
| 415 | * wrong will lead to hard to find bugs since its a race condition. So we |
| 416 | * choose the more reliable method of updating the children to use the drop, |
| 417 | * then switching adj's type, then updating the children again. Did I mention |
| 418 | * that this doesn't happen often... |
| 419 | * So we need to distinguish between the two cases: |
| 420 | * 1 - mac change |
| 421 | * 2 - adj type change |
| 422 | */ |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 423 | if (do_walk && |
| 424 | old_next != adj_next_index && |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 425 | ADJ_INDEX_INVALID != walk_ai) |
| 426 | { |
| 427 | /* |
| 428 | * the adj is changing type. we need to fix all children so that they |
| 429 | * stack momentarily on a drop, while the adj changes. If we don't do |
| 430 | * this the children will send packets to a VLIB graph node that does |
| 431 | * not correspond to the adj's type - and it goes downhill from there. |
| 432 | */ |
| 433 | fib_node_back_walk_ctx_t bw_ctx = { |
| 434 | .fnbw_reason = FIB_NODE_BW_REASON_FLAG_ADJ_DOWN, |
| 435 | /* |
| 436 | * force this walk to be synchrous. if we don't and a node in the graph |
| 437 | * (a heavily shared path-list) chooses to back-ground the walk (make it |
| 438 | * async) then it will pause and we will do the adj update below, before |
| 439 | * all the children are updated. not good. |
| 440 | */ |
| 441 | .fnbw_flags = FIB_NODE_BW_FLAG_FORCE_SYNC, |
| 442 | }; |
| 443 | |
| 444 | fib_walk_sync(FIB_NODE_TYPE_ADJ, walk_ai, &bw_ctx); |
| 445 | } |
| 446 | |
| 447 | /* |
| 448 | * If we are just updating the MAC string of the adj (which we also can't |
| 449 | * do atomically), then we need to stop packets switching through the adj. |
| 450 | * We can't do that on a per-adj basis, so it's all the packets. |
| 451 | * If we are updating the type, and we walked back to the children above, |
| 452 | * then this barrier serves to flush the queues/frames. |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 453 | */ |
| 454 | vlib_worker_thread_barrier_sync(vm); |
| 455 | |
| 456 | adj->lookup_next_index = adj_next_index; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 457 | |
| 458 | if (NULL != rewrite) |
| 459 | { |
| 460 | /* |
| 461 | * new rewrite provided. |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 462 | * fill in the adj's rewrite string, and build the VLIB graph arc. |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 463 | */ |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 464 | vnet_rewrite_set_data_internal(&adj->rewrite_header, |
| 465 | sizeof(adj->rewrite_data), |
| 466 | rewrite, |
| 467 | vec_len(rewrite)); |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 468 | vec_free(rewrite); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 469 | } |
| 470 | else |
| 471 | { |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 472 | vnet_rewrite_clear_data_internal(&adj->rewrite_header, |
| 473 | sizeof(adj->rewrite_data)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 474 | } |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 475 | adj->rewrite_header.next_index = vlib_node_add_next(vlib_get_main(), |
| 476 | this_node, |
| 477 | next_node); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 478 | |
| 479 | /* |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 480 | * done with the rewirte update - let the workers loose. |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 481 | */ |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 482 | vlib_worker_thread_barrier_release(vm); |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 483 | |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 484 | if (do_walk && |
| 485 | (old_next != adj->lookup_next_index) && |
| 486 | (ADJ_INDEX_INVALID != walk_ai)) |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 487 | { |
| 488 | /* |
| 489 | * backwalk to the children so they can stack on the now updated |
| 490 | * adjacency |
| 491 | */ |
| 492 | fib_node_back_walk_ctx_t bw_ctx = { |
| 493 | .fnbw_reason = FIB_NODE_BW_REASON_FLAG_ADJ_UPDATE, |
| 494 | }; |
| 495 | |
| 496 | fib_walk_sync(FIB_NODE_TYPE_ADJ, walk_ai, &bw_ctx); |
| 497 | } |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 498 | /* |
| 499 | * Prevent re-entrant walk of the same adj |
| 500 | */ |
| 501 | if (do_walk) |
| 502 | { |
Neale Ranns | fa5d198 | 2017-02-20 14:19:51 -0800 | [diff] [blame] | 503 | walk_adj->ia_flags &= ~ADJ_FLAG_SYNC_WALK_ACTIVE; |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 504 | } |
| 505 | |
| 506 | adj_unlock(adj_get_index(adj)); |
| 507 | adj_unlock(walk_ai); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 508 | } |
| 509 | |
| 510 | typedef struct adj_db_count_ctx_t_ { |
| 511 | u64 count; |
| 512 | } adj_db_count_ctx_t; |
| 513 | |
| 514 | static void |
| 515 | adj_db_count (BVT(clib_bihash_kv) * kvp, |
| 516 | void *arg) |
| 517 | { |
| 518 | adj_db_count_ctx_t * ctx = arg; |
| 519 | ctx->count++; |
| 520 | } |
| 521 | |
| 522 | u32 |
| 523 | adj_nbr_db_size (void) |
| 524 | { |
| 525 | adj_db_count_ctx_t ctx = { |
| 526 | .count = 0, |
| 527 | }; |
| 528 | fib_protocol_t proto; |
| 529 | u32 sw_if_index = 0; |
| 530 | |
| 531 | for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++) |
| 532 | { |
| 533 | vec_foreach_index(sw_if_index, adj_nbr_tables[proto]) |
| 534 | { |
| 535 | if (NULL != adj_nbr_tables[proto][sw_if_index]) |
| 536 | { |
| 537 | BV(clib_bihash_foreach_key_value_pair) ( |
| 538 | adj_nbr_tables[proto][sw_if_index], |
| 539 | adj_db_count, |
| 540 | &ctx); |
| 541 | } |
| 542 | } |
| 543 | } |
| 544 | return (ctx.count); |
| 545 | } |
| 546 | |
| 547 | /** |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 548 | * @brief Context for a walk of the adjacency neighbour DB |
| 549 | */ |
| 550 | typedef struct adj_walk_ctx_t_ |
| 551 | { |
| 552 | adj_walk_cb_t awc_cb; |
| 553 | void *awc_ctx; |
| 554 | } adj_walk_ctx_t; |
| 555 | |
| 556 | static void |
| 557 | adj_nbr_walk_cb (BVT(clib_bihash_kv) * kvp, |
| 558 | void *arg) |
| 559 | { |
| 560 | adj_walk_ctx_t *ctx = arg; |
| 561 | |
| 562 | // FIXME: can't stop early... |
| 563 | ctx->awc_cb(kvp->value, ctx->awc_ctx); |
| 564 | } |
| 565 | |
| 566 | void |
| 567 | adj_nbr_walk (u32 sw_if_index, |
| 568 | fib_protocol_t adj_nh_proto, |
| 569 | adj_walk_cb_t cb, |
| 570 | void *ctx) |
| 571 | { |
| 572 | if (!ADJ_NBR_ITF_OK(adj_nh_proto, sw_if_index)) |
| 573 | return; |
| 574 | |
| 575 | adj_walk_ctx_t awc = { |
| 576 | .awc_ctx = ctx, |
| 577 | .awc_cb = cb, |
| 578 | }; |
| 579 | |
| 580 | BV(clib_bihash_foreach_key_value_pair) ( |
| 581 | adj_nbr_tables[adj_nh_proto][sw_if_index], |
| 582 | adj_nbr_walk_cb, |
| 583 | &awc); |
| 584 | } |
| 585 | |
| 586 | /** |
| 587 | * @brief Context for a walk of the adjacency neighbour DB |
| 588 | */ |
| 589 | typedef struct adj_walk_nh_ctx_t_ |
| 590 | { |
| 591 | adj_walk_cb_t awc_cb; |
| 592 | void *awc_ctx; |
| 593 | const ip46_address_t *awc_nh; |
| 594 | } adj_walk_nh_ctx_t; |
| 595 | |
| 596 | static void |
| 597 | adj_nbr_walk_nh_cb (BVT(clib_bihash_kv) * kvp, |
| 598 | void *arg) |
| 599 | { |
| 600 | ip_adjacency_t *adj; |
| 601 | adj_walk_nh_ctx_t *ctx = arg; |
| 602 | |
| 603 | adj = adj_get(kvp->value); |
| 604 | |
| 605 | if (!ip46_address_cmp(&adj->sub_type.nbr.next_hop, ctx->awc_nh)) |
| 606 | ctx->awc_cb(kvp->value, ctx->awc_ctx); |
| 607 | } |
| 608 | |
| 609 | /** |
| 610 | * @brief Walk adjacencies on a link with a given v4 next-hop. |
| 611 | * that is visit the adjacencies with different link types. |
| 612 | */ |
| 613 | void |
| 614 | adj_nbr_walk_nh4 (u32 sw_if_index, |
| 615 | const ip4_address_t *addr, |
| 616 | adj_walk_cb_t cb, |
| 617 | void *ctx) |
| 618 | { |
| 619 | if (!ADJ_NBR_ITF_OK(FIB_PROTOCOL_IP4, sw_if_index)) |
| 620 | return; |
| 621 | |
| 622 | ip46_address_t nh = { |
| 623 | .ip4 = *addr, |
| 624 | }; |
| 625 | |
| 626 | adj_walk_nh_ctx_t awc = { |
| 627 | .awc_ctx = ctx, |
| 628 | .awc_cb = cb, |
| 629 | .awc_nh = &nh, |
| 630 | }; |
| 631 | |
| 632 | BV(clib_bihash_foreach_key_value_pair) ( |
| 633 | adj_nbr_tables[FIB_PROTOCOL_IP4][sw_if_index], |
| 634 | adj_nbr_walk_nh_cb, |
| 635 | &awc); |
| 636 | } |
| 637 | |
| 638 | /** |
| 639 | * @brief Walk adjacencies on a link with a given v6 next-hop. |
| 640 | * that is visit the adjacencies with different link types. |
| 641 | */ |
| 642 | void |
| 643 | adj_nbr_walk_nh6 (u32 sw_if_index, |
| 644 | const ip6_address_t *addr, |
| 645 | adj_walk_cb_t cb, |
| 646 | void *ctx) |
| 647 | { |
| 648 | if (!ADJ_NBR_ITF_OK(FIB_PROTOCOL_IP6, sw_if_index)) |
| 649 | return; |
| 650 | |
| 651 | ip46_address_t nh = { |
| 652 | .ip6 = *addr, |
| 653 | }; |
| 654 | |
| 655 | adj_walk_nh_ctx_t awc = { |
| 656 | .awc_ctx = ctx, |
| 657 | .awc_cb = cb, |
| 658 | .awc_nh = &nh, |
| 659 | }; |
| 660 | |
| 661 | BV(clib_bihash_foreach_key_value_pair) ( |
| 662 | adj_nbr_tables[FIB_PROTOCOL_IP6][sw_if_index], |
| 663 | adj_nbr_walk_nh_cb, |
| 664 | &awc); |
| 665 | } |
| 666 | |
| 667 | /** |
| 668 | * @brief Walk adjacencies on a link with a given next-hop. |
| 669 | * that is visit the adjacencies with different link types. |
| 670 | */ |
| 671 | void |
| 672 | adj_nbr_walk_nh (u32 sw_if_index, |
| 673 | fib_protocol_t adj_nh_proto, |
| 674 | const ip46_address_t *nh, |
| 675 | adj_walk_cb_t cb, |
| 676 | void *ctx) |
| 677 | { |
| 678 | if (!ADJ_NBR_ITF_OK(adj_nh_proto, sw_if_index)) |
| 679 | return; |
| 680 | |
| 681 | adj_walk_nh_ctx_t awc = { |
| 682 | .awc_ctx = ctx, |
| 683 | .awc_cb = cb, |
| 684 | .awc_nh = nh, |
| 685 | }; |
| 686 | |
| 687 | BV(clib_bihash_foreach_key_value_pair) ( |
| 688 | adj_nbr_tables[adj_nh_proto][sw_if_index], |
| 689 | adj_nbr_walk_nh_cb, |
| 690 | &awc); |
| 691 | } |
| 692 | |
| 693 | /** |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 694 | * Flags associated with the interface state walks |
| 695 | */ |
| 696 | typedef enum adj_nbr_interface_flags_t_ |
| 697 | { |
| 698 | ADJ_NBR_INTERFACE_UP = (1 << 0), |
| 699 | } adj_nbr_interface_flags_t; |
| 700 | |
| 701 | /** |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 702 | * Context for the state change walk of the DB |
| 703 | */ |
| 704 | typedef struct adj_nbr_interface_state_change_ctx_t_ |
| 705 | { |
| 706 | /** |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 707 | * Flags on the interface |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 708 | */ |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 709 | adj_nbr_interface_flags_t flags; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 710 | } adj_nbr_interface_state_change_ctx_t; |
| 711 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 712 | static adj_walk_rc_t |
| 713 | adj_nbr_interface_state_change_one (adj_index_t ai, |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 714 | void *arg) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 715 | { |
| 716 | /* |
| 717 | * Back walk the graph to inform the forwarding entries |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 718 | * that this interface state has changed. Do this synchronously |
| 719 | * since this is the walk that provides convergence |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 720 | */ |
| 721 | adj_nbr_interface_state_change_ctx_t *ctx = arg; |
| 722 | |
| 723 | fib_node_back_walk_ctx_t bw_ctx = { |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 724 | .fnbw_reason = ((ctx->flags & ADJ_NBR_INTERFACE_UP) ? |
| 725 | FIB_NODE_BW_REASON_FLAG_INTERFACE_UP : |
| 726 | FIB_NODE_BW_REASON_FLAG_INTERFACE_DOWN), |
| 727 | /* |
| 728 | * the force sync applies only as far as the first fib_entry. |
| 729 | * And it's the fib_entry's we need to converge away from |
| 730 | * the adjacencies on the now down link |
| 731 | */ |
| 732 | .fnbw_flags = (!(ctx->flags & ADJ_NBR_INTERFACE_UP) ? |
| 733 | FIB_NODE_BW_FLAG_FORCE_SYNC : |
| 734 | 0), |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 735 | }; |
| 736 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 737 | fib_walk_sync(FIB_NODE_TYPE_ADJ, ai, &bw_ctx); |
| 738 | |
| 739 | return (ADJ_WALK_RC_CONTINUE); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 740 | } |
| 741 | |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 742 | /** |
| 743 | * @brief Registered function for SW interface state changes |
| 744 | */ |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 745 | static clib_error_t * |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 746 | adj_nbr_sw_interface_state_change (vnet_main_t * vnm, |
| 747 | u32 sw_if_index, |
| 748 | u32 flags) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 749 | { |
| 750 | fib_protocol_t proto; |
| 751 | |
| 752 | /* |
| 753 | * walk each adj on the interface and trigger a walk from that adj |
| 754 | */ |
| 755 | for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++) |
| 756 | { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 757 | adj_nbr_interface_state_change_ctx_t ctx = { |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 758 | .flags = ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ? |
| 759 | ADJ_NBR_INTERFACE_UP : |
| 760 | 0), |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 761 | }; |
| 762 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 763 | adj_nbr_walk(sw_if_index, proto, |
| 764 | adj_nbr_interface_state_change_one, |
| 765 | &ctx); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 766 | } |
| 767 | |
| 768 | return (NULL); |
| 769 | } |
| 770 | |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 771 | VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION_PRIO( |
| 772 | adj_nbr_sw_interface_state_change, |
| 773 | VNET_ITF_FUNC_PRIORITY_HIGH); |
| 774 | |
| 775 | /** |
| 776 | * @brief Invoked on each SW interface of a HW interface when the |
| 777 | * HW interface state changes |
| 778 | */ |
| 779 | static void |
| 780 | adj_nbr_hw_sw_interface_state_change (vnet_main_t * vnm, |
| 781 | u32 sw_if_index, |
| 782 | void *arg) |
| 783 | { |
| 784 | adj_nbr_interface_state_change_ctx_t *ctx = arg; |
| 785 | fib_protocol_t proto; |
| 786 | |
| 787 | /* |
| 788 | * walk each adj on the interface and trigger a walk from that adj |
| 789 | */ |
| 790 | for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++) |
| 791 | { |
| 792 | adj_nbr_walk(sw_if_index, proto, |
| 793 | adj_nbr_interface_state_change_one, |
| 794 | ctx); |
| 795 | } |
| 796 | } |
| 797 | |
| 798 | /** |
| 799 | * @brief Registered callback for HW interface state changes |
| 800 | */ |
| 801 | static clib_error_t * |
| 802 | adj_nbr_hw_interface_state_change (vnet_main_t * vnm, |
| 803 | u32 hw_if_index, |
| 804 | u32 flags) |
| 805 | { |
| 806 | /* |
| 807 | * walk SW interface on the HW |
| 808 | */ |
| 809 | adj_nbr_interface_state_change_ctx_t ctx = { |
| 810 | .flags = ((flags & VNET_HW_INTERFACE_FLAG_LINK_UP) ? |
| 811 | ADJ_NBR_INTERFACE_UP : |
| 812 | 0), |
| 813 | }; |
| 814 | |
| 815 | vnet_hw_interface_walk_sw(vnm, hw_if_index, |
| 816 | adj_nbr_hw_sw_interface_state_change, |
| 817 | &ctx); |
| 818 | |
| 819 | return (NULL); |
| 820 | } |
| 821 | |
| 822 | VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION_PRIO( |
| 823 | adj_nbr_hw_interface_state_change, |
| 824 | VNET_ITF_FUNC_PRIORITY_HIGH); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 825 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 826 | static adj_walk_rc_t |
| 827 | adj_nbr_interface_delete_one (adj_index_t ai, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 828 | void *arg) |
| 829 | { |
| 830 | /* |
| 831 | * Back walk the graph to inform the forwarding entries |
| 832 | * that this interface has been deleted. |
| 833 | */ |
| 834 | fib_node_back_walk_ctx_t bw_ctx = { |
| 835 | .fnbw_reason = FIB_NODE_BW_REASON_FLAG_INTERFACE_DELETE, |
| 836 | }; |
| 837 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 838 | fib_walk_sync(FIB_NODE_TYPE_ADJ, ai, &bw_ctx); |
| 839 | |
| 840 | return (ADJ_WALK_RC_CONTINUE); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 841 | } |
| 842 | |
| 843 | /** |
| 844 | * adj_nbr_interface_add_del |
| 845 | * |
| 846 | * Registered to receive interface Add and delete notifications |
| 847 | */ |
| 848 | static clib_error_t * |
| 849 | adj_nbr_interface_add_del (vnet_main_t * vnm, |
| 850 | u32 sw_if_index, |
| 851 | u32 is_add) |
| 852 | { |
| 853 | fib_protocol_t proto; |
| 854 | |
| 855 | if (is_add) |
| 856 | { |
| 857 | /* |
| 858 | * not interested in interface additions. we will not back walk |
| 859 | * to resolve paths through newly added interfaces. Why? The control |
| 860 | * plane should have the brains to add interfaces first, then routes. |
| 861 | * So the case where there are paths with a interface that matches |
| 862 | * one just created is the case where the path resolved through an |
| 863 | * interface that was deleted, and still has not been removed. The |
| 864 | * new interface added, is NO GUARANTEE that the interface being |
| 865 | * added now, even though it may have the same sw_if_index, is the |
| 866 | * same interface that the path needs. So tough! |
| 867 | * If the control plane wants these routes to resolve it needs to |
| 868 | * remove and add them again. |
| 869 | */ |
| 870 | return (NULL); |
| 871 | } |
| 872 | |
| 873 | for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++) |
| 874 | { |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 875 | adj_nbr_walk(sw_if_index, proto, |
| 876 | adj_nbr_interface_delete_one, |
| 877 | NULL); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 878 | } |
| 879 | |
| 880 | return (NULL); |
| 881 | |
| 882 | } |
| 883 | |
| 884 | VNET_SW_INTERFACE_ADD_DEL_FUNCTION(adj_nbr_interface_add_del); |
| 885 | |
| 886 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 887 | static adj_walk_rc_t |
| 888 | adj_nbr_show_one (adj_index_t ai, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 889 | void *arg) |
| 890 | { |
| 891 | vlib_cli_output (arg, "[@%d] %U", |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 892 | ai, |
| 893 | format_ip_adjacency, ai, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 894 | FORMAT_IP_ADJACENCY_NONE); |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 895 | |
| 896 | return (ADJ_WALK_RC_CONTINUE); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 897 | } |
| 898 | |
| 899 | static clib_error_t * |
| 900 | adj_nbr_show (vlib_main_t * vm, |
| 901 | unformat_input_t * input, |
| 902 | vlib_cli_command_t * cmd) |
| 903 | { |
| 904 | adj_index_t ai = ADJ_INDEX_INVALID; |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 905 | u32 sw_if_index = ~0; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 906 | |
| 907 | while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) |
| 908 | { |
| 909 | if (unformat (input, "%d", &ai)) |
| 910 | ; |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 911 | else if (unformat (input, "%U", |
| 912 | unformat_vnet_sw_interface, vnet_get_main(), |
| 913 | &sw_if_index)) |
| 914 | ; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 915 | else |
| 916 | break; |
| 917 | } |
| 918 | |
| 919 | if (ADJ_INDEX_INVALID != ai) |
| 920 | { |
| 921 | vlib_cli_output (vm, "[@%d] %U", |
| 922 | ai, |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 923 | format_ip_adjacency, ai, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 924 | FORMAT_IP_ADJACENCY_DETAIL); |
| 925 | } |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 926 | else if (~0 != sw_if_index) |
| 927 | { |
| 928 | fib_protocol_t proto; |
| 929 | |
| 930 | for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++) |
| 931 | { |
| 932 | adj_nbr_walk(sw_if_index, proto, |
| 933 | adj_nbr_show_one, |
| 934 | vm); |
| 935 | } |
| 936 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 937 | else |
| 938 | { |
| 939 | fib_protocol_t proto; |
| 940 | |
| 941 | for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++) |
| 942 | { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 943 | vec_foreach_index(sw_if_index, adj_nbr_tables[proto]) |
| 944 | { |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 945 | adj_nbr_walk(sw_if_index, proto, |
| 946 | adj_nbr_show_one, |
| 947 | vm); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 948 | } |
| 949 | } |
| 950 | } |
| 951 | |
| 952 | return 0; |
| 953 | } |
| 954 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 955 | /*? |
| 956 | * Show all neighbour adjacencies. |
| 957 | * @cliexpar |
| 958 | * @cliexstart{sh adj nbr} |
| 959 | * [@2] ipv4 via 1.0.0.2 loop0: IP4: 00:00:22:aa:bb:cc -> 00:00:11:aa:bb:cc |
| 960 | * [@3] mpls via 1.0.0.2 loop0: MPLS_UNICAST: 00:00:22:aa:bb:cc -> 00:00:11:aa:bb:cc |
| 961 | * [@4] ipv4 via 1.0.0.3 loop0: IP4: 00:00:22:aa:bb:cc -> 00:00:11:aa:bb:cc |
| 962 | * [@5] mpls via 1.0.0.3 loop0: MPLS_UNICAST: 00:00:22:aa:bb:cc -> 00:00:11:aa:bb:cc |
| 963 | * @cliexend |
| 964 | ?*/ |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 965 | VLIB_CLI_COMMAND (ip4_show_fib_command, static) = { |
| 966 | .path = "show adj nbr", |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 967 | .short_help = "show adj nbr [<adj_index>] [interface]", |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 968 | .function = adj_nbr_show, |
| 969 | }; |
| 970 | |
| 971 | u8* |
| 972 | format_adj_nbr_incomplete (u8* s, va_list *ap) |
| 973 | { |
Billy McFall | cfcf1e2 | 2016-10-14 09:51:49 -0400 | [diff] [blame] | 974 | index_t index = va_arg(*ap, index_t); |
| 975 | CLIB_UNUSED(u32 indent) = va_arg(*ap, u32); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 976 | vnet_main_t * vnm = vnet_get_main(); |
| 977 | ip_adjacency_t * adj = adj_get(index); |
| 978 | |
Neale Ranns | 924d03a | 2016-10-19 08:25:46 +0100 | [diff] [blame] | 979 | s = format (s, "arp-%U", format_vnet_link, adj->ia_link); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 980 | s = format (s, ": via %U", |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 981 | format_ip46_address, &adj->sub_type.nbr.next_hop, |
| 982 | adj_proto_to_46(adj->ia_nh_proto)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 983 | s = format (s, " %U", |
Steven | 70488ab | 2018-03-28 17:59:00 -0700 | [diff] [blame] | 984 | format_vnet_sw_if_index_name, |
| 985 | vnm, adj->rewrite_header.sw_if_index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 986 | |
| 987 | return (s); |
| 988 | } |
| 989 | |
| 990 | u8* |
| 991 | format_adj_nbr (u8* s, va_list *ap) |
| 992 | { |
Billy McFall | cfcf1e2 | 2016-10-14 09:51:49 -0400 | [diff] [blame] | 993 | index_t index = va_arg(*ap, index_t); |
| 994 | CLIB_UNUSED(u32 indent) = va_arg(*ap, u32); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 995 | ip_adjacency_t * adj = adj_get(index); |
| 996 | |
Neale Ranns | 924d03a | 2016-10-19 08:25:46 +0100 | [diff] [blame] | 997 | s = format (s, "%U", format_vnet_link, adj->ia_link); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 998 | s = format (s, " via %U ", |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 999 | format_ip46_address, &adj->sub_type.nbr.next_hop, |
| 1000 | adj_proto_to_46(adj->ia_nh_proto)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1001 | s = format (s, "%U", |
| 1002 | format_vnet_rewrite, |
Neale Ranns | b069a69 | 2017-03-15 12:34:25 -0400 | [diff] [blame] | 1003 | &adj->rewrite_header, sizeof (adj->rewrite_data), 0); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1004 | |
| 1005 | return (s); |
| 1006 | } |
| 1007 | |
| 1008 | static void |
| 1009 | adj_dpo_lock (dpo_id_t *dpo) |
| 1010 | { |
| 1011 | adj_lock(dpo->dpoi_index); |
| 1012 | } |
| 1013 | static void |
| 1014 | adj_dpo_unlock (dpo_id_t *dpo) |
| 1015 | { |
| 1016 | adj_unlock(dpo->dpoi_index); |
| 1017 | } |
| 1018 | |
Neale Ranns | 6c3ebcc | 2016-10-02 21:20:15 +0100 | [diff] [blame] | 1019 | static void |
| 1020 | adj_mem_show (void) |
| 1021 | { |
| 1022 | fib_show_memory_usage("Adjacency", |
| 1023 | pool_elts(adj_pool), |
| 1024 | pool_len(adj_pool), |
| 1025 | sizeof(ip_adjacency_t)); |
| 1026 | } |
| 1027 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1028 | const static dpo_vft_t adj_nbr_dpo_vft = { |
| 1029 | .dv_lock = adj_dpo_lock, |
| 1030 | .dv_unlock = adj_dpo_unlock, |
| 1031 | .dv_format = format_adj_nbr, |
Neale Ranns | 6c3ebcc | 2016-10-02 21:20:15 +0100 | [diff] [blame] | 1032 | .dv_mem_show = adj_mem_show, |
Andrew Yourtchenko | 5f3fcb9 | 2017-10-25 05:50:37 -0700 | [diff] [blame] | 1033 | .dv_get_urpf = adj_dpo_get_urpf, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1034 | }; |
| 1035 | const static dpo_vft_t adj_nbr_incompl_dpo_vft = { |
| 1036 | .dv_lock = adj_dpo_lock, |
| 1037 | .dv_unlock = adj_dpo_unlock, |
| 1038 | .dv_format = format_adj_nbr_incomplete, |
Andrew Yourtchenko | 5f3fcb9 | 2017-10-25 05:50:37 -0700 | [diff] [blame] | 1039 | .dv_get_urpf = adj_dpo_get_urpf, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1040 | }; |
| 1041 | |
| 1042 | /** |
| 1043 | * @brief The per-protocol VLIB graph nodes that are assigned to an adjacency |
| 1044 | * object. |
| 1045 | * |
| 1046 | * this means that these graph nodes are ones from which a nbr is the |
| 1047 | * parent object in the DPO-graph. |
| 1048 | */ |
| 1049 | const static char* const nbr_ip4_nodes[] = |
| 1050 | { |
Neale Ranns | f06aea5 | 2016-11-29 06:51:37 -0800 | [diff] [blame] | 1051 | "ip4-rewrite", |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1052 | NULL, |
| 1053 | }; |
| 1054 | const static char* const nbr_ip6_nodes[] = |
| 1055 | { |
| 1056 | "ip6-rewrite", |
| 1057 | NULL, |
| 1058 | }; |
| 1059 | const static char* const nbr_mpls_nodes[] = |
| 1060 | { |
| 1061 | "mpls-output", |
| 1062 | NULL, |
| 1063 | }; |
Neale Ranns | 5e575b1 | 2016-10-03 09:40:25 +0100 | [diff] [blame] | 1064 | const static char* const nbr_ethernet_nodes[] = |
| 1065 | { |
| 1066 | "adj-l2-rewrite", |
| 1067 | NULL, |
| 1068 | }; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1069 | const static char* const * const nbr_nodes[DPO_PROTO_NUM] = |
| 1070 | { |
| 1071 | [DPO_PROTO_IP4] = nbr_ip4_nodes, |
| 1072 | [DPO_PROTO_IP6] = nbr_ip6_nodes, |
| 1073 | [DPO_PROTO_MPLS] = nbr_mpls_nodes, |
Neale Ranns | 5e575b1 | 2016-10-03 09:40:25 +0100 | [diff] [blame] | 1074 | [DPO_PROTO_ETHERNET] = nbr_ethernet_nodes, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1075 | }; |
| 1076 | |
| 1077 | const static char* const nbr_incomplete_ip4_nodes[] = |
| 1078 | { |
| 1079 | "ip4-arp", |
| 1080 | NULL, |
| 1081 | }; |
| 1082 | const static char* const nbr_incomplete_ip6_nodes[] = |
| 1083 | { |
| 1084 | "ip6-discover-neighbor", |
| 1085 | NULL, |
| 1086 | }; |
| 1087 | const static char* const nbr_incomplete_mpls_nodes[] = |
| 1088 | { |
| 1089 | "mpls-adj-incomplete", |
| 1090 | NULL, |
| 1091 | }; |
| 1092 | |
| 1093 | const static char* const * const nbr_incomplete_nodes[DPO_PROTO_NUM] = |
| 1094 | { |
| 1095 | [DPO_PROTO_IP4] = nbr_incomplete_ip4_nodes, |
| 1096 | [DPO_PROTO_IP6] = nbr_incomplete_ip6_nodes, |
| 1097 | [DPO_PROTO_MPLS] = nbr_incomplete_mpls_nodes, |
| 1098 | }; |
| 1099 | |
| 1100 | void |
| 1101 | adj_nbr_module_init (void) |
| 1102 | { |
| 1103 | dpo_register(DPO_ADJACENCY, |
| 1104 | &adj_nbr_dpo_vft, |
| 1105 | nbr_nodes); |
| 1106 | dpo_register(DPO_ADJACENCY_INCOMPLETE, |
| 1107 | &adj_nbr_incompl_dpo_vft, |
| 1108 | nbr_incomplete_nodes); |
| 1109 | } |