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 | |
Neale Ranns | ae80983 | 2018-11-23 09:00:27 -0800 | [diff] [blame] | 21 | #include <vppinfra/bihash_24_8.h> |
| 22 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 23 | /* |
| 24 | * Vector Hash tables of neighbour (traditional) adjacencies |
| 25 | * Key: interface(for the vector index), address (and its proto), |
| 26 | * link-type/ether-type. |
| 27 | */ |
| 28 | static BVT(clib_bihash) **adj_nbr_tables[FIB_PROTOCOL_MAX]; |
| 29 | |
| 30 | // FIXME SIZE APPROPRIATELY. ASK DAVEB. |
| 31 | #define ADJ_NBR_DEFAULT_HASH_NUM_BUCKETS (64 * 64) |
| 32 | #define ADJ_NBR_DEFAULT_HASH_MEMORY_SIZE (32<<20) |
| 33 | |
| 34 | |
| 35 | #define ADJ_NBR_SET_KEY(_key, _lt, _nh) \ |
| 36 | { \ |
| 37 | _key.key[0] = (_nh)->as_u64[0]; \ |
| 38 | _key.key[1] = (_nh)->as_u64[1]; \ |
| 39 | _key.key[2] = (_lt); \ |
| 40 | } |
| 41 | |
| 42 | #define ADJ_NBR_ITF_OK(_proto, _itf) \ |
| 43 | (((_itf) < vec_len(adj_nbr_tables[_proto])) && \ |
| 44 | (NULL != adj_nbr_tables[_proto][sw_if_index])) |
| 45 | |
| 46 | static void |
| 47 | adj_nbr_insert (fib_protocol_t nh_proto, |
Neale Ranns | 924d03a | 2016-10-19 08:25:46 +0100 | [diff] [blame] | 48 | vnet_link_t link_type, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 49 | const ip46_address_t *nh_addr, |
| 50 | u32 sw_if_index, |
| 51 | adj_index_t adj_index) |
| 52 | { |
| 53 | BVT(clib_bihash_kv) kv; |
| 54 | |
| 55 | if (sw_if_index >= vec_len(adj_nbr_tables[nh_proto])) |
| 56 | { |
| 57 | vec_validate(adj_nbr_tables[nh_proto], sw_if_index); |
| 58 | } |
| 59 | if (NULL == adj_nbr_tables[nh_proto][sw_if_index]) |
| 60 | { |
| 61 | adj_nbr_tables[nh_proto][sw_if_index] = |
| 62 | clib_mem_alloc_aligned(sizeof(BVT(clib_bihash)), |
| 63 | CLIB_CACHE_LINE_BYTES); |
Dave Barach | b7b9299 | 2018-10-17 10:38:51 -0400 | [diff] [blame] | 64 | clib_memset(adj_nbr_tables[nh_proto][sw_if_index], |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 65 | 0, |
| 66 | sizeof(BVT(clib_bihash))); |
| 67 | |
| 68 | BV(clib_bihash_init) (adj_nbr_tables[nh_proto][sw_if_index], |
| 69 | "Adjacency Neighbour table", |
| 70 | ADJ_NBR_DEFAULT_HASH_NUM_BUCKETS, |
| 71 | ADJ_NBR_DEFAULT_HASH_MEMORY_SIZE); |
| 72 | } |
| 73 | |
| 74 | ADJ_NBR_SET_KEY(kv, link_type, nh_addr); |
| 75 | kv.value = adj_index; |
| 76 | |
| 77 | BV(clib_bihash_add_del) (adj_nbr_tables[nh_proto][sw_if_index], &kv, 1); |
| 78 | } |
| 79 | |
| 80 | void |
Neale Ranns | 177bbdc | 2016-11-15 09:46:51 +0000 | [diff] [blame] | 81 | adj_nbr_remove (adj_index_t ai, |
| 82 | fib_protocol_t nh_proto, |
Neale Ranns | 924d03a | 2016-10-19 08:25:46 +0100 | [diff] [blame] | 83 | vnet_link_t link_type, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 84 | const ip46_address_t *nh_addr, |
| 85 | u32 sw_if_index) |
| 86 | { |
| 87 | BVT(clib_bihash_kv) kv; |
| 88 | |
| 89 | if (!ADJ_NBR_ITF_OK(nh_proto, sw_if_index)) |
| 90 | return; |
| 91 | |
| 92 | ADJ_NBR_SET_KEY(kv, link_type, nh_addr); |
Neale Ranns | 177bbdc | 2016-11-15 09:46:51 +0000 | [diff] [blame] | 93 | kv.value = ai; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 94 | |
| 95 | BV(clib_bihash_add_del) (adj_nbr_tables[nh_proto][sw_if_index], &kv, 0); |
| 96 | } |
| 97 | |
Florin Coras | f9d0568 | 2018-04-26 08:26:52 -0700 | [diff] [blame] | 98 | adj_index_t |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 99 | adj_nbr_find (fib_protocol_t nh_proto, |
Neale Ranns | 924d03a | 2016-10-19 08:25:46 +0100 | [diff] [blame] | 100 | vnet_link_t link_type, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 101 | const ip46_address_t *nh_addr, |
| 102 | u32 sw_if_index) |
| 103 | { |
| 104 | BVT(clib_bihash_kv) kv; |
| 105 | |
| 106 | ADJ_NBR_SET_KEY(kv, link_type, nh_addr); |
| 107 | |
| 108 | if (!ADJ_NBR_ITF_OK(nh_proto, sw_if_index)) |
| 109 | return (ADJ_INDEX_INVALID); |
| 110 | |
| 111 | if (BV(clib_bihash_search)(adj_nbr_tables[nh_proto][sw_if_index], |
| 112 | &kv, &kv) < 0) |
| 113 | { |
| 114 | return (ADJ_INDEX_INVALID); |
| 115 | } |
| 116 | else |
| 117 | { |
| 118 | return (kv.value); |
| 119 | } |
| 120 | } |
| 121 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 122 | static inline u32 |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 123 | adj_get_nd_node (fib_protocol_t proto) |
| 124 | { |
| 125 | switch (proto) { |
| 126 | case FIB_PROTOCOL_IP4: |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 127 | return (ip4_arp_node.index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 128 | case FIB_PROTOCOL_IP6: |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 129 | return (ip6_discover_neighbor_node.index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 130 | case FIB_PROTOCOL_MPLS: |
| 131 | break; |
| 132 | } |
| 133 | ASSERT(0); |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 134 | return (ip4_arp_node.index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 135 | } |
| 136 | |
AkshayaNadahalli | 17f5f60 | 2017-03-27 14:47:41 +0530 | [diff] [blame] | 137 | /** |
| 138 | * @brief Check and set feature flags if o/p interface has any o/p features. |
| 139 | */ |
| 140 | static void |
| 141 | adj_nbr_evaluate_feature (adj_index_t ai) |
| 142 | { |
| 143 | ip_adjacency_t *adj; |
| 144 | vnet_feature_main_t *fm = &feature_main; |
| 145 | i16 feature_count; |
| 146 | u8 arc_index; |
| 147 | u32 sw_if_index; |
| 148 | |
| 149 | adj = adj_get(ai); |
| 150 | |
| 151 | switch (adj->ia_link) |
| 152 | { |
| 153 | case VNET_LINK_IP4: |
| 154 | arc_index = ip4_main.lookup_main.output_feature_arc_index; |
| 155 | break; |
| 156 | case VNET_LINK_IP6: |
| 157 | arc_index = ip6_main.lookup_main.output_feature_arc_index; |
| 158 | break; |
| 159 | case VNET_LINK_MPLS: |
| 160 | arc_index = mpls_main.output_feature_arc_index; |
| 161 | break; |
| 162 | default: |
| 163 | return; |
| 164 | } |
| 165 | |
| 166 | sw_if_index = adj->rewrite_header.sw_if_index; |
AkshayaNadahalli | 98ab091 | 2017-03-27 17:21:05 +0000 | [diff] [blame] | 167 | if (vec_len(fm->feature_count_by_sw_if_index[arc_index]) > sw_if_index) |
| 168 | { |
| 169 | feature_count = fm->feature_count_by_sw_if_index[arc_index][sw_if_index]; |
| 170 | if (feature_count > 0) |
| 171 | adj->rewrite_header.flags |= VNET_REWRITE_HAS_FEATURES; |
| 172 | } |
AkshayaNadahalli | 17f5f60 | 2017-03-27 14:47:41 +0530 | [diff] [blame] | 173 | |
| 174 | return; |
| 175 | } |
| 176 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 177 | static ip_adjacency_t* |
| 178 | adj_nbr_alloc (fib_protocol_t nh_proto, |
Neale Ranns | 924d03a | 2016-10-19 08:25:46 +0100 | [diff] [blame] | 179 | vnet_link_t link_type, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 180 | const ip46_address_t *nh_addr, |
| 181 | u32 sw_if_index) |
| 182 | { |
| 183 | ip_adjacency_t *adj; |
| 184 | |
| 185 | adj = adj_alloc(nh_proto); |
| 186 | |
| 187 | adj_nbr_insert(nh_proto, link_type, nh_addr, |
| 188 | sw_if_index, |
Neale Ranns | 6c3ebcc | 2016-10-02 21:20:15 +0100 | [diff] [blame] | 189 | adj_get_index(adj)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 190 | |
| 191 | /* |
| 192 | * since we just added the ADJ we have no rewrite string for it, |
| 193 | * so its for ARP |
| 194 | */ |
| 195 | adj->lookup_next_index = IP_LOOKUP_NEXT_ARP; |
| 196 | adj->sub_type.nbr.next_hop = *nh_addr; |
| 197 | adj->ia_link = link_type; |
| 198 | adj->ia_nh_proto = nh_proto; |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 199 | adj->rewrite_header.sw_if_index = sw_if_index; |
Neale Ranns | 1bce5a9 | 2018-10-30 06:34:25 -0700 | [diff] [blame] | 200 | vnet_rewrite_update_mtu(vnet_get_main(), adj->ia_link, |
| 201 | &adj->rewrite_header); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 202 | |
AkshayaNadahalli | 17f5f60 | 2017-03-27 14:47:41 +0530 | [diff] [blame] | 203 | adj_nbr_evaluate_feature (adj_get_index(adj)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 204 | return (adj); |
| 205 | } |
| 206 | |
| 207 | /* |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 208 | * adj_nbr_add_or_lock |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 209 | * |
| 210 | * Add an adjacency for the neighbour requested. |
| 211 | * |
| 212 | * The key for an adj is: |
| 213 | * - the Next-hops protocol (i.e. v4 or v6) |
| 214 | * - the address of the next-hop |
| 215 | * - the interface the next-hop is reachable through |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 216 | */ |
| 217 | adj_index_t |
| 218 | adj_nbr_add_or_lock (fib_protocol_t nh_proto, |
Neale Ranns | 924d03a | 2016-10-19 08:25:46 +0100 | [diff] [blame] | 219 | vnet_link_t link_type, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 220 | const ip46_address_t *nh_addr, |
| 221 | u32 sw_if_index) |
| 222 | { |
| 223 | adj_index_t adj_index; |
| 224 | ip_adjacency_t *adj; |
| 225 | |
| 226 | adj_index = adj_nbr_find(nh_proto, link_type, nh_addr, sw_if_index); |
| 227 | |
| 228 | if (ADJ_INDEX_INVALID == adj_index) |
| 229 | { |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 230 | vnet_main_t *vnm; |
| 231 | |
| 232 | vnm = vnet_get_main(); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 233 | 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] | 234 | adj_index = adj_get_index(adj); |
| 235 | adj_lock(adj_index); |
| 236 | |
Neale Ranns | 1855b8e | 2018-07-11 10:31:26 -0700 | [diff] [blame] | 237 | if (ip46_address_is_equal(&ADJ_BCAST_ADDR, nh_addr)) |
| 238 | { |
| 239 | adj->lookup_next_index = IP_LOOKUP_NEXT_BCAST; |
| 240 | } |
| 241 | |
Ole Troan | d723161 | 2018-06-07 10:17:57 +0200 | [diff] [blame] | 242 | vnet_rewrite_init(vnm, sw_if_index, link_type, |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 243 | adj_get_nd_node(nh_proto), |
| 244 | vnet_tx_node_index_for_sw_interface(vnm, sw_if_index), |
| 245 | &adj->rewrite_header); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 246 | |
| 247 | /* |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 248 | * we need a rewrite where the destination IP address is converted |
| 249 | * to the appropriate link-layer address. This is interface specific. |
| 250 | * So ask the interface to do it. |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 251 | */ |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 252 | vnet_update_adjacency_for_sw_interface(vnm, sw_if_index, adj_index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 253 | } |
| 254 | else |
| 255 | { |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 256 | adj_lock(adj_index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 257 | } |
| 258 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 259 | return (adj_index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 260 | } |
| 261 | |
| 262 | adj_index_t |
| 263 | adj_nbr_add_or_lock_w_rewrite (fib_protocol_t nh_proto, |
Neale Ranns | 924d03a | 2016-10-19 08:25:46 +0100 | [diff] [blame] | 264 | vnet_link_t link_type, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 265 | const ip46_address_t *nh_addr, |
| 266 | u32 sw_if_index, |
| 267 | u8 *rewrite) |
| 268 | { |
| 269 | adj_index_t adj_index; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 270 | |
| 271 | adj_index = adj_nbr_find(nh_proto, link_type, nh_addr, sw_if_index); |
| 272 | |
| 273 | if (ADJ_INDEX_INVALID == adj_index) |
| 274 | { |
Neale Ranns | 13a08cc | 2018-11-07 09:25:54 -0800 | [diff] [blame] | 275 | ip_adjacency_t *adj; |
| 276 | |
| 277 | adj = adj_nbr_alloc(nh_proto, link_type, nh_addr, sw_if_index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 278 | adj->rewrite_header.sw_if_index = sw_if_index; |
Neale Ranns | 13a08cc | 2018-11-07 09:25:54 -0800 | [diff] [blame] | 279 | adj_index = adj_get_index(adj); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 280 | } |
| 281 | |
Neale Ranns | 13a08cc | 2018-11-07 09:25:54 -0800 | [diff] [blame] | 282 | adj_lock(adj_index); |
| 283 | adj_nbr_update_rewrite(adj_index, |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 284 | ADJ_NBR_REWRITE_FLAG_COMPLETE, |
| 285 | rewrite); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 286 | |
Neale Ranns | 13a08cc | 2018-11-07 09:25:54 -0800 | [diff] [blame] | 287 | return (adj_index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 288 | } |
| 289 | |
| 290 | /** |
| 291 | * adj_nbr_update_rewrite |
| 292 | * |
| 293 | * Update the adjacency's rewrite string. A NULL string implies the |
| 294 | * rewirte is reset (i.e. when ARP/ND etnry is gone). |
| 295 | * NB: the adj being updated may be handling traffic in the DP. |
| 296 | */ |
| 297 | void |
| 298 | adj_nbr_update_rewrite (adj_index_t adj_index, |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 299 | adj_nbr_rewrite_flag_t flags, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 300 | u8 *rewrite) |
| 301 | { |
| 302 | ip_adjacency_t *adj; |
| 303 | |
| 304 | ASSERT(ADJ_INDEX_INVALID != adj_index); |
| 305 | |
| 306 | adj = adj_get(adj_index); |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 307 | |
| 308 | if (flags & ADJ_NBR_REWRITE_FLAG_COMPLETE) |
| 309 | { |
| 310 | /* |
| 311 | * update the adj's rewrite string and build the arc |
| 312 | * from the rewrite node to the interface's TX node |
| 313 | */ |
| 314 | adj_nbr_update_rewrite_internal(adj, IP_LOOKUP_NEXT_REWRITE, |
| 315 | adj_get_rewrite_node(adj->ia_link), |
| 316 | vnet_tx_node_index_for_sw_interface( |
| 317 | vnet_get_main(), |
| 318 | adj->rewrite_header.sw_if_index), |
| 319 | rewrite); |
| 320 | } |
| 321 | else |
| 322 | { |
| 323 | adj_nbr_update_rewrite_internal(adj, IP_LOOKUP_NEXT_ARP, |
| 324 | adj_get_nd_node(adj->ia_nh_proto), |
| 325 | vnet_tx_node_index_for_sw_interface( |
| 326 | vnet_get_main(), |
| 327 | adj->rewrite_header.sw_if_index), |
| 328 | rewrite); |
| 329 | } |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 330 | } |
| 331 | |
| 332 | /** |
| 333 | * adj_nbr_update_rewrite_internal |
| 334 | * |
| 335 | * Update the adjacency's rewrite string. A NULL string implies the |
| 336 | * rewirte is reset (i.e. when ARP/ND etnry is gone). |
| 337 | * NB: the adj being updated may be handling traffic in the DP. |
| 338 | */ |
| 339 | void |
| 340 | adj_nbr_update_rewrite_internal (ip_adjacency_t *adj, |
Neale Ranns | fa5d198 | 2017-02-20 14:19:51 -0800 | [diff] [blame] | 341 | ip_lookup_next_t adj_next_index, |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 342 | u32 this_node, |
| 343 | u32 next_node, |
| 344 | u8 *rewrite) |
| 345 | { |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 346 | ip_adjacency_t *walk_adj; |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 347 | adj_index_t walk_ai; |
| 348 | vlib_main_t * vm; |
| 349 | u32 old_next; |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 350 | int do_walk; |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 351 | |
| 352 | vm = vlib_get_main(); |
| 353 | old_next = adj->lookup_next_index; |
| 354 | |
| 355 | walk_ai = adj_get_index(adj); |
| 356 | if (VNET_LINK_MPLS == adj->ia_link) |
| 357 | { |
| 358 | /* |
| 359 | * The link type MPLS has no children in the control plane graph, it only |
| 360 | * has children in the data-palne graph. The backwalk is up the former. |
| 361 | * So we need to walk from its IP cousin. |
| 362 | */ |
| 363 | walk_ai = adj_nbr_find(adj->ia_nh_proto, |
| 364 | fib_proto_to_link(adj->ia_nh_proto), |
| 365 | &adj->sub_type.nbr.next_hop, |
| 366 | adj->rewrite_header.sw_if_index); |
| 367 | } |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 368 | |
| 369 | /* |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 370 | * Don't call the walk re-entrantly |
| 371 | */ |
| 372 | if (ADJ_INDEX_INVALID != walk_ai) |
| 373 | { |
| 374 | walk_adj = adj_get(walk_ai); |
Neale Ranns | fa5d198 | 2017-02-20 14:19:51 -0800 | [diff] [blame] | 375 | if (ADJ_FLAG_SYNC_WALK_ACTIVE & walk_adj->ia_flags) |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 376 | { |
| 377 | do_walk = 0; |
| 378 | } |
| 379 | else |
| 380 | { |
| 381 | /* |
| 382 | * Prevent re-entrant walk of the same adj |
| 383 | */ |
Neale Ranns | fa5d198 | 2017-02-20 14:19:51 -0800 | [diff] [blame] | 384 | walk_adj->ia_flags |= ADJ_FLAG_SYNC_WALK_ACTIVE; |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 385 | do_walk = 1; |
| 386 | } |
| 387 | } |
| 388 | else |
| 389 | { |
| 390 | do_walk = 0; |
| 391 | } |
| 392 | |
| 393 | /* |
| 394 | * lock the adjacencies that are affected by updates this walk will provoke. |
| 395 | * Since the aim of the walk is to update children to link to a different |
| 396 | * DPO, this adj will no longer be in use and its lock count will drop to 0. |
| 397 | * We don't want it to be deleted as part of this endevour. |
| 398 | */ |
| 399 | adj_lock(adj_get_index(adj)); |
| 400 | adj_lock(walk_ai); |
| 401 | |
| 402 | /* |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 403 | * Updating a rewrite string is not atomic; |
| 404 | * - the rewrite string is too long to write in one instruction |
| 405 | * - when swapping from incomplete to complete, we also need to update |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 406 | * the VLIB graph next-index of the adj. |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 407 | * ideally we would only want to suspend forwarding via this adj whilst we |
| 408 | * do this, but we do not have that level of granularity - it's suspend all |
| 409 | * worker threads or nothing. |
| 410 | * The other chioces are: |
| 411 | * - to mark the adj down and back walk so child load-balances drop this adj |
| 412 | * from the set. |
| 413 | * - update the next_node index of this adj to point to error-drop |
| 414 | * 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] | 415 | * which is not acceptable. However, when the adj changes type (from |
| 416 | * complete to incomplete and vice-versa) the child DPOs, which have the |
| 417 | * VLIB graph next node index, will be sending packets to the wrong graph |
| 418 | * node. So from the options above, updating the next_node of the adj to |
| 419 | * be drop will work, but it relies on each graph node v4/v6/mpls, rewrite/ |
| 420 | * arp/midchain always be valid w.r.t. a mis-match of adj type and node type |
| 421 | * (i.e. a rewrite adj in the arp node). This is not enforcable. Getting it |
| 422 | * wrong will lead to hard to find bugs since its a race condition. So we |
| 423 | * choose the more reliable method of updating the children to use the drop, |
| 424 | * then switching adj's type, then updating the children again. Did I mention |
| 425 | * that this doesn't happen often... |
| 426 | * So we need to distinguish between the two cases: |
| 427 | * 1 - mac change |
| 428 | * 2 - adj type change |
| 429 | */ |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 430 | if (do_walk && |
| 431 | old_next != adj_next_index && |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 432 | ADJ_INDEX_INVALID != walk_ai) |
| 433 | { |
| 434 | /* |
| 435 | * the adj is changing type. we need to fix all children so that they |
| 436 | * stack momentarily on a drop, while the adj changes. If we don't do |
| 437 | * this the children will send packets to a VLIB graph node that does |
| 438 | * not correspond to the adj's type - and it goes downhill from there. |
| 439 | */ |
| 440 | fib_node_back_walk_ctx_t bw_ctx = { |
| 441 | .fnbw_reason = FIB_NODE_BW_REASON_FLAG_ADJ_DOWN, |
| 442 | /* |
| 443 | * force this walk to be synchrous. if we don't and a node in the graph |
| 444 | * (a heavily shared path-list) chooses to back-ground the walk (make it |
| 445 | * async) then it will pause and we will do the adj update below, before |
| 446 | * all the children are updated. not good. |
| 447 | */ |
| 448 | .fnbw_flags = FIB_NODE_BW_FLAG_FORCE_SYNC, |
| 449 | }; |
| 450 | |
| 451 | fib_walk_sync(FIB_NODE_TYPE_ADJ, walk_ai, &bw_ctx); |
| 452 | } |
| 453 | |
| 454 | /* |
| 455 | * If we are just updating the MAC string of the adj (which we also can't |
| 456 | * do atomically), then we need to stop packets switching through the adj. |
| 457 | * We can't do that on a per-adj basis, so it's all the packets. |
| 458 | * If we are updating the type, and we walked back to the children above, |
| 459 | * then this barrier serves to flush the queues/frames. |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 460 | */ |
| 461 | vlib_worker_thread_barrier_sync(vm); |
| 462 | |
| 463 | adj->lookup_next_index = adj_next_index; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 464 | |
| 465 | if (NULL != rewrite) |
| 466 | { |
| 467 | /* |
| 468 | * new rewrite provided. |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 469 | * 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] | 470 | */ |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 471 | vnet_rewrite_set_data_internal(&adj->rewrite_header, |
| 472 | sizeof(adj->rewrite_data), |
| 473 | rewrite, |
| 474 | vec_len(rewrite)); |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 475 | vec_free(rewrite); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 476 | } |
| 477 | else |
| 478 | { |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 479 | vnet_rewrite_clear_data_internal(&adj->rewrite_header, |
| 480 | sizeof(adj->rewrite_data)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 481 | } |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 482 | adj->rewrite_header.next_index = vlib_node_add_next(vlib_get_main(), |
| 483 | this_node, |
| 484 | next_node); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 485 | |
| 486 | /* |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 487 | * done with the rewirte update - let the workers loose. |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 488 | */ |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 489 | vlib_worker_thread_barrier_release(vm); |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 490 | |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 491 | if (do_walk && |
| 492 | (old_next != adj->lookup_next_index) && |
| 493 | (ADJ_INDEX_INVALID != walk_ai)) |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 494 | { |
| 495 | /* |
| 496 | * backwalk to the children so they can stack on the now updated |
| 497 | * adjacency |
| 498 | */ |
| 499 | fib_node_back_walk_ctx_t bw_ctx = { |
| 500 | .fnbw_reason = FIB_NODE_BW_REASON_FLAG_ADJ_UPDATE, |
| 501 | }; |
| 502 | |
| 503 | fib_walk_sync(FIB_NODE_TYPE_ADJ, walk_ai, &bw_ctx); |
| 504 | } |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 505 | /* |
| 506 | * Prevent re-entrant walk of the same adj |
| 507 | */ |
| 508 | if (do_walk) |
| 509 | { |
Neale Ranns | fa5d198 | 2017-02-20 14:19:51 -0800 | [diff] [blame] | 510 | walk_adj->ia_flags &= ~ADJ_FLAG_SYNC_WALK_ACTIVE; |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 511 | } |
| 512 | |
| 513 | adj_unlock(adj_get_index(adj)); |
| 514 | adj_unlock(walk_ai); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 515 | } |
| 516 | |
| 517 | typedef struct adj_db_count_ctx_t_ { |
| 518 | u64 count; |
| 519 | } adj_db_count_ctx_t; |
| 520 | |
| 521 | static void |
| 522 | adj_db_count (BVT(clib_bihash_kv) * kvp, |
| 523 | void *arg) |
| 524 | { |
| 525 | adj_db_count_ctx_t * ctx = arg; |
| 526 | ctx->count++; |
| 527 | } |
| 528 | |
| 529 | u32 |
| 530 | adj_nbr_db_size (void) |
| 531 | { |
| 532 | adj_db_count_ctx_t ctx = { |
| 533 | .count = 0, |
| 534 | }; |
| 535 | fib_protocol_t proto; |
| 536 | u32 sw_if_index = 0; |
| 537 | |
| 538 | for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++) |
| 539 | { |
| 540 | vec_foreach_index(sw_if_index, adj_nbr_tables[proto]) |
| 541 | { |
| 542 | if (NULL != adj_nbr_tables[proto][sw_if_index]) |
| 543 | { |
| 544 | BV(clib_bihash_foreach_key_value_pair) ( |
| 545 | adj_nbr_tables[proto][sw_if_index], |
| 546 | adj_db_count, |
| 547 | &ctx); |
| 548 | } |
| 549 | } |
| 550 | } |
| 551 | return (ctx.count); |
| 552 | } |
| 553 | |
| 554 | /** |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 555 | * @brief Context for a walk of the adjacency neighbour DB |
| 556 | */ |
| 557 | typedef struct adj_walk_ctx_t_ |
| 558 | { |
| 559 | adj_walk_cb_t awc_cb; |
| 560 | void *awc_ctx; |
| 561 | } adj_walk_ctx_t; |
| 562 | |
| 563 | static void |
| 564 | adj_nbr_walk_cb (BVT(clib_bihash_kv) * kvp, |
| 565 | void *arg) |
| 566 | { |
| 567 | adj_walk_ctx_t *ctx = arg; |
| 568 | |
| 569 | // FIXME: can't stop early... |
| 570 | ctx->awc_cb(kvp->value, ctx->awc_ctx); |
| 571 | } |
| 572 | |
| 573 | void |
| 574 | adj_nbr_walk (u32 sw_if_index, |
| 575 | fib_protocol_t adj_nh_proto, |
| 576 | adj_walk_cb_t cb, |
| 577 | void *ctx) |
| 578 | { |
| 579 | if (!ADJ_NBR_ITF_OK(adj_nh_proto, sw_if_index)) |
| 580 | return; |
| 581 | |
| 582 | adj_walk_ctx_t awc = { |
| 583 | .awc_ctx = ctx, |
| 584 | .awc_cb = cb, |
| 585 | }; |
| 586 | |
| 587 | BV(clib_bihash_foreach_key_value_pair) ( |
| 588 | adj_nbr_tables[adj_nh_proto][sw_if_index], |
| 589 | adj_nbr_walk_cb, |
| 590 | &awc); |
| 591 | } |
| 592 | |
| 593 | /** |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 594 | * @brief Walk adjacencies on a link with a given v4 next-hop. |
| 595 | * that is visit the adjacencies with different link types. |
| 596 | */ |
| 597 | void |
| 598 | adj_nbr_walk_nh4 (u32 sw_if_index, |
| 599 | const ip4_address_t *addr, |
| 600 | adj_walk_cb_t cb, |
| 601 | void *ctx) |
| 602 | { |
| 603 | if (!ADJ_NBR_ITF_OK(FIB_PROTOCOL_IP4, sw_if_index)) |
| 604 | return; |
| 605 | |
| 606 | ip46_address_t nh = { |
| 607 | .ip4 = *addr, |
| 608 | }; |
Neale Ranns | 580bba7 | 2018-04-23 05:31:19 -0700 | [diff] [blame] | 609 | vnet_link_t linkt; |
| 610 | adj_index_t ai; |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 611 | |
Neale Ranns | 580bba7 | 2018-04-23 05:31:19 -0700 | [diff] [blame] | 612 | FOR_EACH_VNET_LINK(linkt) |
| 613 | { |
| 614 | ai = adj_nbr_find (FIB_PROTOCOL_IP4, linkt, &nh, sw_if_index); |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 615 | |
Neale Ranns | 580bba7 | 2018-04-23 05:31:19 -0700 | [diff] [blame] | 616 | if (INDEX_INVALID != ai) |
| 617 | cb(ai, ctx); |
| 618 | } |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 619 | } |
| 620 | |
| 621 | /** |
| 622 | * @brief Walk adjacencies on a link with a given v6 next-hop. |
| 623 | * that is visit the adjacencies with different link types. |
| 624 | */ |
| 625 | void |
| 626 | adj_nbr_walk_nh6 (u32 sw_if_index, |
| 627 | const ip6_address_t *addr, |
| 628 | adj_walk_cb_t cb, |
| 629 | void *ctx) |
| 630 | { |
| 631 | if (!ADJ_NBR_ITF_OK(FIB_PROTOCOL_IP6, sw_if_index)) |
| 632 | return; |
| 633 | |
| 634 | ip46_address_t nh = { |
| 635 | .ip6 = *addr, |
| 636 | }; |
Neale Ranns | 580bba7 | 2018-04-23 05:31:19 -0700 | [diff] [blame] | 637 | vnet_link_t linkt; |
| 638 | adj_index_t ai; |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 639 | |
Neale Ranns | 580bba7 | 2018-04-23 05:31:19 -0700 | [diff] [blame] | 640 | FOR_EACH_VNET_LINK(linkt) |
| 641 | { |
| 642 | ai = adj_nbr_find (FIB_PROTOCOL_IP6, linkt, &nh, sw_if_index); |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 643 | |
Neale Ranns | 580bba7 | 2018-04-23 05:31:19 -0700 | [diff] [blame] | 644 | if (INDEX_INVALID != ai) |
| 645 | cb(ai, ctx); |
| 646 | } |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 647 | } |
| 648 | |
| 649 | /** |
| 650 | * @brief Walk adjacencies on a link with a given next-hop. |
| 651 | * that is visit the adjacencies with different link types. |
| 652 | */ |
| 653 | void |
| 654 | adj_nbr_walk_nh (u32 sw_if_index, |
| 655 | fib_protocol_t adj_nh_proto, |
| 656 | const ip46_address_t *nh, |
| 657 | adj_walk_cb_t cb, |
| 658 | void *ctx) |
| 659 | { |
| 660 | if (!ADJ_NBR_ITF_OK(adj_nh_proto, sw_if_index)) |
| 661 | return; |
| 662 | |
Neale Ranns | 580bba7 | 2018-04-23 05:31:19 -0700 | [diff] [blame] | 663 | vnet_link_t linkt; |
| 664 | adj_index_t ai; |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 665 | |
Neale Ranns | 580bba7 | 2018-04-23 05:31:19 -0700 | [diff] [blame] | 666 | FOR_EACH_VNET_LINK(linkt) |
| 667 | { |
| 668 | ai = adj_nbr_find (FIB_PROTOCOL_IP4, linkt, nh, sw_if_index); |
| 669 | |
| 670 | if (INDEX_INVALID != ai) |
| 671 | cb(ai, ctx); |
| 672 | } |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 673 | } |
| 674 | |
| 675 | /** |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 676 | * Flags associated with the interface state walks |
| 677 | */ |
| 678 | typedef enum adj_nbr_interface_flags_t_ |
| 679 | { |
| 680 | ADJ_NBR_INTERFACE_UP = (1 << 0), |
| 681 | } adj_nbr_interface_flags_t; |
| 682 | |
| 683 | /** |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 684 | * Context for the state change walk of the DB |
| 685 | */ |
| 686 | typedef struct adj_nbr_interface_state_change_ctx_t_ |
| 687 | { |
| 688 | /** |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 689 | * Flags on the interface |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 690 | */ |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 691 | adj_nbr_interface_flags_t flags; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 692 | } adj_nbr_interface_state_change_ctx_t; |
| 693 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 694 | static adj_walk_rc_t |
| 695 | adj_nbr_interface_state_change_one (adj_index_t ai, |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 696 | void *arg) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 697 | { |
| 698 | /* |
| 699 | * Back walk the graph to inform the forwarding entries |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 700 | * that this interface state has changed. Do this synchronously |
| 701 | * since this is the walk that provides convergence |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 702 | */ |
| 703 | adj_nbr_interface_state_change_ctx_t *ctx = arg; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 704 | fib_node_back_walk_ctx_t bw_ctx = { |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 705 | .fnbw_reason = ((ctx->flags & ADJ_NBR_INTERFACE_UP) ? |
| 706 | FIB_NODE_BW_REASON_FLAG_INTERFACE_UP : |
| 707 | FIB_NODE_BW_REASON_FLAG_INTERFACE_DOWN), |
| 708 | /* |
| 709 | * the force sync applies only as far as the first fib_entry. |
| 710 | * And it's the fib_entry's we need to converge away from |
| 711 | * the adjacencies on the now down link |
| 712 | */ |
| 713 | .fnbw_flags = (!(ctx->flags & ADJ_NBR_INTERFACE_UP) ? |
| 714 | FIB_NODE_BW_FLAG_FORCE_SYNC : |
Neale Ranns | 30d5364 | 2018-08-27 07:29:15 -0700 | [diff] [blame] | 715 | FIB_NODE_BW_FLAG_NONE), |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 716 | }; |
Neale Ranns | 30d5364 | 2018-08-27 07:29:15 -0700 | [diff] [blame] | 717 | ip_adjacency_t *adj; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 718 | |
Neale Ranns | 30d5364 | 2018-08-27 07:29:15 -0700 | [diff] [blame] | 719 | adj = adj_get(ai); |
| 720 | |
| 721 | adj->ia_flags |= ADJ_FLAG_SYNC_WALK_ACTIVE; |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 722 | fib_walk_sync(FIB_NODE_TYPE_ADJ, ai, &bw_ctx); |
Neale Ranns | 30d5364 | 2018-08-27 07:29:15 -0700 | [diff] [blame] | 723 | adj->ia_flags &= ~ADJ_FLAG_SYNC_WALK_ACTIVE; |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 724 | |
| 725 | return (ADJ_WALK_RC_CONTINUE); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 726 | } |
| 727 | |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 728 | /** |
| 729 | * @brief Registered function for SW interface state changes |
| 730 | */ |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 731 | static clib_error_t * |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 732 | adj_nbr_sw_interface_state_change (vnet_main_t * vnm, |
| 733 | u32 sw_if_index, |
| 734 | u32 flags) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 735 | { |
| 736 | fib_protocol_t proto; |
| 737 | |
| 738 | /* |
| 739 | * walk each adj on the interface and trigger a walk from that adj |
| 740 | */ |
| 741 | for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++) |
| 742 | { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 743 | adj_nbr_interface_state_change_ctx_t ctx = { |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 744 | .flags = ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ? |
| 745 | ADJ_NBR_INTERFACE_UP : |
| 746 | 0), |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 747 | }; |
| 748 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 749 | adj_nbr_walk(sw_if_index, proto, |
| 750 | adj_nbr_interface_state_change_one, |
| 751 | &ctx); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 752 | } |
| 753 | |
| 754 | return (NULL); |
| 755 | } |
| 756 | |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 757 | VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION_PRIO( |
| 758 | adj_nbr_sw_interface_state_change, |
| 759 | VNET_ITF_FUNC_PRIORITY_HIGH); |
| 760 | |
| 761 | /** |
| 762 | * @brief Invoked on each SW interface of a HW interface when the |
| 763 | * HW interface state changes |
| 764 | */ |
Neale Ranns | 0053de6 | 2018-05-22 08:40:52 -0700 | [diff] [blame] | 765 | static walk_rc_t |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 766 | adj_nbr_hw_sw_interface_state_change (vnet_main_t * vnm, |
| 767 | u32 sw_if_index, |
| 768 | void *arg) |
| 769 | { |
| 770 | adj_nbr_interface_state_change_ctx_t *ctx = arg; |
| 771 | fib_protocol_t proto; |
| 772 | |
| 773 | /* |
| 774 | * walk each adj on the interface and trigger a walk from that adj |
| 775 | */ |
| 776 | for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++) |
| 777 | { |
| 778 | adj_nbr_walk(sw_if_index, proto, |
| 779 | adj_nbr_interface_state_change_one, |
| 780 | ctx); |
| 781 | } |
Neale Ranns | 0053de6 | 2018-05-22 08:40:52 -0700 | [diff] [blame] | 782 | return (WALK_CONTINUE); |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 783 | } |
| 784 | |
| 785 | /** |
| 786 | * @brief Registered callback for HW interface state changes |
| 787 | */ |
| 788 | static clib_error_t * |
| 789 | adj_nbr_hw_interface_state_change (vnet_main_t * vnm, |
| 790 | u32 hw_if_index, |
| 791 | u32 flags) |
| 792 | { |
| 793 | /* |
| 794 | * walk SW interface on the HW |
| 795 | */ |
| 796 | adj_nbr_interface_state_change_ctx_t ctx = { |
| 797 | .flags = ((flags & VNET_HW_INTERFACE_FLAG_LINK_UP) ? |
| 798 | ADJ_NBR_INTERFACE_UP : |
| 799 | 0), |
| 800 | }; |
| 801 | |
| 802 | vnet_hw_interface_walk_sw(vnm, hw_if_index, |
| 803 | adj_nbr_hw_sw_interface_state_change, |
| 804 | &ctx); |
| 805 | |
| 806 | return (NULL); |
| 807 | } |
| 808 | |
| 809 | VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION_PRIO( |
| 810 | adj_nbr_hw_interface_state_change, |
| 811 | VNET_ITF_FUNC_PRIORITY_HIGH); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 812 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 813 | static adj_walk_rc_t |
| 814 | adj_nbr_interface_delete_one (adj_index_t ai, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 815 | void *arg) |
| 816 | { |
| 817 | /* |
| 818 | * Back walk the graph to inform the forwarding entries |
| 819 | * that this interface has been deleted. |
| 820 | */ |
| 821 | fib_node_back_walk_ctx_t bw_ctx = { |
| 822 | .fnbw_reason = FIB_NODE_BW_REASON_FLAG_INTERFACE_DELETE, |
| 823 | }; |
Neale Ranns | 30d5364 | 2018-08-27 07:29:15 -0700 | [diff] [blame] | 824 | ip_adjacency_t *adj; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 825 | |
Neale Ranns | 30d5364 | 2018-08-27 07:29:15 -0700 | [diff] [blame] | 826 | adj = adj_get(ai); |
| 827 | |
| 828 | adj->ia_flags |= ADJ_FLAG_SYNC_WALK_ACTIVE; |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 829 | fib_walk_sync(FIB_NODE_TYPE_ADJ, ai, &bw_ctx); |
Neale Ranns | 30d5364 | 2018-08-27 07:29:15 -0700 | [diff] [blame] | 830 | adj->ia_flags &= ~ADJ_FLAG_SYNC_WALK_ACTIVE; |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 831 | |
| 832 | return (ADJ_WALK_RC_CONTINUE); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 833 | } |
| 834 | |
| 835 | /** |
| 836 | * adj_nbr_interface_add_del |
| 837 | * |
| 838 | * Registered to receive interface Add and delete notifications |
| 839 | */ |
| 840 | static clib_error_t * |
| 841 | adj_nbr_interface_add_del (vnet_main_t * vnm, |
| 842 | u32 sw_if_index, |
| 843 | u32 is_add) |
| 844 | { |
| 845 | fib_protocol_t proto; |
| 846 | |
| 847 | if (is_add) |
| 848 | { |
| 849 | /* |
| 850 | * not interested in interface additions. we will not back walk |
| 851 | * to resolve paths through newly added interfaces. Why? The control |
| 852 | * plane should have the brains to add interfaces first, then routes. |
| 853 | * So the case where there are paths with a interface that matches |
| 854 | * one just created is the case where the path resolved through an |
| 855 | * interface that was deleted, and still has not been removed. The |
| 856 | * new interface added, is NO GUARANTEE that the interface being |
| 857 | * added now, even though it may have the same sw_if_index, is the |
| 858 | * same interface that the path needs. So tough! |
| 859 | * If the control plane wants these routes to resolve it needs to |
| 860 | * remove and add them again. |
| 861 | */ |
| 862 | return (NULL); |
| 863 | } |
| 864 | |
| 865 | for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++) |
| 866 | { |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 867 | adj_nbr_walk(sw_if_index, proto, |
| 868 | adj_nbr_interface_delete_one, |
| 869 | NULL); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 870 | } |
| 871 | |
| 872 | return (NULL); |
| 873 | |
| 874 | } |
| 875 | |
| 876 | VNET_SW_INTERFACE_ADD_DEL_FUNCTION(adj_nbr_interface_add_del); |
| 877 | |
| 878 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 879 | static adj_walk_rc_t |
| 880 | adj_nbr_show_one (adj_index_t ai, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 881 | void *arg) |
| 882 | { |
| 883 | vlib_cli_output (arg, "[@%d] %U", |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 884 | ai, |
| 885 | format_ip_adjacency, ai, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 886 | FORMAT_IP_ADJACENCY_NONE); |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 887 | |
| 888 | return (ADJ_WALK_RC_CONTINUE); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 889 | } |
| 890 | |
| 891 | static clib_error_t * |
| 892 | adj_nbr_show (vlib_main_t * vm, |
| 893 | unformat_input_t * input, |
| 894 | vlib_cli_command_t * cmd) |
| 895 | { |
| 896 | adj_index_t ai = ADJ_INDEX_INVALID; |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 897 | u32 sw_if_index = ~0; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 898 | |
| 899 | while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) |
| 900 | { |
| 901 | if (unformat (input, "%d", &ai)) |
| 902 | ; |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 903 | else if (unformat (input, "%U", |
| 904 | unformat_vnet_sw_interface, vnet_get_main(), |
| 905 | &sw_if_index)) |
| 906 | ; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 907 | else |
| 908 | break; |
| 909 | } |
| 910 | |
| 911 | if (ADJ_INDEX_INVALID != ai) |
| 912 | { |
| 913 | vlib_cli_output (vm, "[@%d] %U", |
| 914 | ai, |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 915 | format_ip_adjacency, ai, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 916 | FORMAT_IP_ADJACENCY_DETAIL); |
| 917 | } |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 918 | else if (~0 != sw_if_index) |
| 919 | { |
| 920 | fib_protocol_t proto; |
| 921 | |
| 922 | for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++) |
| 923 | { |
| 924 | adj_nbr_walk(sw_if_index, proto, |
| 925 | adj_nbr_show_one, |
| 926 | vm); |
| 927 | } |
| 928 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 929 | else |
| 930 | { |
| 931 | fib_protocol_t proto; |
| 932 | |
| 933 | for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++) |
| 934 | { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 935 | vec_foreach_index(sw_if_index, adj_nbr_tables[proto]) |
| 936 | { |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 937 | adj_nbr_walk(sw_if_index, proto, |
| 938 | adj_nbr_show_one, |
| 939 | vm); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 940 | } |
| 941 | } |
| 942 | } |
| 943 | |
| 944 | return 0; |
| 945 | } |
| 946 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 947 | /*? |
| 948 | * Show all neighbour adjacencies. |
| 949 | * @cliexpar |
| 950 | * @cliexstart{sh adj nbr} |
| 951 | * [@2] ipv4 via 1.0.0.2 loop0: IP4: 00:00:22:aa:bb:cc -> 00:00:11:aa:bb:cc |
| 952 | * [@3] mpls via 1.0.0.2 loop0: MPLS_UNICAST: 00:00:22:aa:bb:cc -> 00:00:11:aa:bb:cc |
| 953 | * [@4] ipv4 via 1.0.0.3 loop0: IP4: 00:00:22:aa:bb:cc -> 00:00:11:aa:bb:cc |
| 954 | * [@5] mpls via 1.0.0.3 loop0: MPLS_UNICAST: 00:00:22:aa:bb:cc -> 00:00:11:aa:bb:cc |
| 955 | * @cliexend |
| 956 | ?*/ |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 957 | VLIB_CLI_COMMAND (ip4_show_fib_command, static) = { |
| 958 | .path = "show adj nbr", |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 959 | .short_help = "show adj nbr [<adj_index>] [interface]", |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 960 | .function = adj_nbr_show, |
| 961 | }; |
| 962 | |
| 963 | u8* |
| 964 | format_adj_nbr_incomplete (u8* s, va_list *ap) |
| 965 | { |
Billy McFall | cfcf1e2 | 2016-10-14 09:51:49 -0400 | [diff] [blame] | 966 | index_t index = va_arg(*ap, index_t); |
| 967 | CLIB_UNUSED(u32 indent) = va_arg(*ap, u32); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 968 | vnet_main_t * vnm = vnet_get_main(); |
| 969 | ip_adjacency_t * adj = adj_get(index); |
| 970 | |
Neale Ranns | 924d03a | 2016-10-19 08:25:46 +0100 | [diff] [blame] | 971 | s = format (s, "arp-%U", format_vnet_link, adj->ia_link); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 972 | s = format (s, ": via %U", |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 973 | format_ip46_address, &adj->sub_type.nbr.next_hop, |
| 974 | adj_proto_to_46(adj->ia_nh_proto)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 975 | s = format (s, " %U", |
Steven | 70488ab | 2018-03-28 17:59:00 -0700 | [diff] [blame] | 976 | format_vnet_sw_if_index_name, |
| 977 | vnm, adj->rewrite_header.sw_if_index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 978 | |
| 979 | return (s); |
| 980 | } |
| 981 | |
| 982 | u8* |
| 983 | format_adj_nbr (u8* s, va_list *ap) |
| 984 | { |
Billy McFall | cfcf1e2 | 2016-10-14 09:51:49 -0400 | [diff] [blame] | 985 | index_t index = va_arg(*ap, index_t); |
| 986 | CLIB_UNUSED(u32 indent) = va_arg(*ap, u32); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 987 | ip_adjacency_t * adj = adj_get(index); |
| 988 | |
Neale Ranns | 924d03a | 2016-10-19 08:25:46 +0100 | [diff] [blame] | 989 | s = format (s, "%U", format_vnet_link, adj->ia_link); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 990 | s = format (s, " via %U ", |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 991 | format_ip46_address, &adj->sub_type.nbr.next_hop, |
| 992 | adj_proto_to_46(adj->ia_nh_proto)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 993 | s = format (s, "%U", |
| 994 | format_vnet_rewrite, |
Neale Ranns | b069a69 | 2017-03-15 12:34:25 -0400 | [diff] [blame] | 995 | &adj->rewrite_header, sizeof (adj->rewrite_data), 0); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 996 | |
| 997 | return (s); |
| 998 | } |
| 999 | |
| 1000 | static void |
| 1001 | adj_dpo_lock (dpo_id_t *dpo) |
| 1002 | { |
| 1003 | adj_lock(dpo->dpoi_index); |
| 1004 | } |
| 1005 | static void |
| 1006 | adj_dpo_unlock (dpo_id_t *dpo) |
| 1007 | { |
| 1008 | adj_unlock(dpo->dpoi_index); |
| 1009 | } |
| 1010 | |
Neale Ranns | 6c3ebcc | 2016-10-02 21:20:15 +0100 | [diff] [blame] | 1011 | static void |
| 1012 | adj_mem_show (void) |
| 1013 | { |
| 1014 | fib_show_memory_usage("Adjacency", |
| 1015 | pool_elts(adj_pool), |
| 1016 | pool_len(adj_pool), |
| 1017 | sizeof(ip_adjacency_t)); |
| 1018 | } |
| 1019 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1020 | const static dpo_vft_t adj_nbr_dpo_vft = { |
| 1021 | .dv_lock = adj_dpo_lock, |
| 1022 | .dv_unlock = adj_dpo_unlock, |
| 1023 | .dv_format = format_adj_nbr, |
Neale Ranns | 6c3ebcc | 2016-10-02 21:20:15 +0100 | [diff] [blame] | 1024 | .dv_mem_show = adj_mem_show, |
Andrew Yourtchenko | 5f3fcb9 | 2017-10-25 05:50:37 -0700 | [diff] [blame] | 1025 | .dv_get_urpf = adj_dpo_get_urpf, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1026 | }; |
| 1027 | const static dpo_vft_t adj_nbr_incompl_dpo_vft = { |
| 1028 | .dv_lock = adj_dpo_lock, |
| 1029 | .dv_unlock = adj_dpo_unlock, |
| 1030 | .dv_format = format_adj_nbr_incomplete, |
Andrew Yourtchenko | 5f3fcb9 | 2017-10-25 05:50:37 -0700 | [diff] [blame] | 1031 | .dv_get_urpf = adj_dpo_get_urpf, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1032 | }; |
| 1033 | |
| 1034 | /** |
| 1035 | * @brief The per-protocol VLIB graph nodes that are assigned to an adjacency |
| 1036 | * object. |
| 1037 | * |
| 1038 | * this means that these graph nodes are ones from which a nbr is the |
| 1039 | * parent object in the DPO-graph. |
| 1040 | */ |
| 1041 | const static char* const nbr_ip4_nodes[] = |
| 1042 | { |
Neale Ranns | f06aea5 | 2016-11-29 06:51:37 -0800 | [diff] [blame] | 1043 | "ip4-rewrite", |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1044 | NULL, |
| 1045 | }; |
| 1046 | const static char* const nbr_ip6_nodes[] = |
| 1047 | { |
| 1048 | "ip6-rewrite", |
| 1049 | NULL, |
| 1050 | }; |
| 1051 | const static char* const nbr_mpls_nodes[] = |
| 1052 | { |
| 1053 | "mpls-output", |
| 1054 | NULL, |
| 1055 | }; |
Neale Ranns | 5e575b1 | 2016-10-03 09:40:25 +0100 | [diff] [blame] | 1056 | const static char* const nbr_ethernet_nodes[] = |
| 1057 | { |
| 1058 | "adj-l2-rewrite", |
| 1059 | NULL, |
| 1060 | }; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1061 | const static char* const * const nbr_nodes[DPO_PROTO_NUM] = |
| 1062 | { |
| 1063 | [DPO_PROTO_IP4] = nbr_ip4_nodes, |
| 1064 | [DPO_PROTO_IP6] = nbr_ip6_nodes, |
| 1065 | [DPO_PROTO_MPLS] = nbr_mpls_nodes, |
Neale Ranns | 5e575b1 | 2016-10-03 09:40:25 +0100 | [diff] [blame] | 1066 | [DPO_PROTO_ETHERNET] = nbr_ethernet_nodes, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1067 | }; |
| 1068 | |
| 1069 | const static char* const nbr_incomplete_ip4_nodes[] = |
| 1070 | { |
| 1071 | "ip4-arp", |
| 1072 | NULL, |
| 1073 | }; |
| 1074 | const static char* const nbr_incomplete_ip6_nodes[] = |
| 1075 | { |
| 1076 | "ip6-discover-neighbor", |
| 1077 | NULL, |
| 1078 | }; |
| 1079 | const static char* const nbr_incomplete_mpls_nodes[] = |
| 1080 | { |
| 1081 | "mpls-adj-incomplete", |
| 1082 | NULL, |
| 1083 | }; |
| 1084 | |
| 1085 | const static char* const * const nbr_incomplete_nodes[DPO_PROTO_NUM] = |
| 1086 | { |
| 1087 | [DPO_PROTO_IP4] = nbr_incomplete_ip4_nodes, |
| 1088 | [DPO_PROTO_IP6] = nbr_incomplete_ip6_nodes, |
| 1089 | [DPO_PROTO_MPLS] = nbr_incomplete_mpls_nodes, |
| 1090 | }; |
| 1091 | |
| 1092 | void |
| 1093 | adj_nbr_module_init (void) |
| 1094 | { |
| 1095 | dpo_register(DPO_ADJACENCY, |
| 1096 | &adj_nbr_dpo_vft, |
| 1097 | nbr_nodes); |
| 1098 | dpo_register(DPO_ADJACENCY_INCOMPLETE, |
| 1099 | &adj_nbr_incompl_dpo_vft, |
| 1100 | nbr_incomplete_nodes); |
| 1101 | } |