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 | */ |
Neale Ranns | 20aec3d | 2020-05-25 09:09:36 +0000 | [diff] [blame] | 26 | static uword **adj_nbr_tables[FIB_PROTOCOL_IP_MAX]; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 27 | |
Neale Ranns | 20aec3d | 2020-05-25 09:09:36 +0000 | [diff] [blame] | 28 | typedef struct adj_nbr_key_t_ |
| 29 | { |
| 30 | ip46_address_t ank_ip; |
| 31 | u64 ank_linkt; |
| 32 | } adj_nbr_key_t; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 33 | |
| 34 | #define ADJ_NBR_SET_KEY(_key, _lt, _nh) \ |
| 35 | { \ |
Neale Ranns | 20aec3d | 2020-05-25 09:09:36 +0000 | [diff] [blame] | 36 | ip46_address_copy(&(_key).ank_ip, (_nh)); \ |
| 37 | _key.ank_linkt = (_lt); \ |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 38 | } |
| 39 | |
| 40 | #define ADJ_NBR_ITF_OK(_proto, _itf) \ |
| 41 | (((_itf) < vec_len(adj_nbr_tables[_proto])) && \ |
yedg | f6698d2 | 2020-08-29 14:12:20 +0800 | [diff] [blame] | 42 | (NULL != adj_nbr_tables[_proto][(_itf)])) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 43 | |
Benoît Ganne | faec38f | 2020-08-13 11:16:56 +0200 | [diff] [blame] | 44 | #define ADJ_NBR_ASSERT_NH_PROTO(nh_proto, err) \ |
| 45 | do { \ |
| 46 | ASSERT (nh_proto < FIB_PROTOCOL_IP_MAX); \ |
| 47 | const fib_protocol_t nh_proto__ = (nh_proto); \ |
| 48 | if (nh_proto__ >= FIB_PROTOCOL_IP_MAX) \ |
| 49 | { \ |
| 50 | clib_warning ("BUG: protocol %d > %d\n", \ |
| 51 | (int)nh_proto__, \ |
| 52 | FIB_PROTOCOL_IP_MAX); \ |
| 53 | return err; \ |
| 54 | } \ |
| 55 | } while (0) |
| 56 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 57 | static void |
| 58 | adj_nbr_insert (fib_protocol_t nh_proto, |
Neale Ranns | 924d03a | 2016-10-19 08:25:46 +0100 | [diff] [blame] | 59 | vnet_link_t link_type, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 60 | const ip46_address_t *nh_addr, |
| 61 | u32 sw_if_index, |
| 62 | adj_index_t adj_index) |
| 63 | { |
Neale Ranns | 20aec3d | 2020-05-25 09:09:36 +0000 | [diff] [blame] | 64 | adj_nbr_key_t kv; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 65 | |
Benoît Ganne | faec38f | 2020-08-13 11:16:56 +0200 | [diff] [blame] | 66 | ADJ_NBR_ASSERT_NH_PROTO (nh_proto,); |
| 67 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 68 | if (sw_if_index >= vec_len(adj_nbr_tables[nh_proto])) |
| 69 | { |
| 70 | vec_validate(adj_nbr_tables[nh_proto], sw_if_index); |
| 71 | } |
| 72 | if (NULL == adj_nbr_tables[nh_proto][sw_if_index]) |
| 73 | { |
| 74 | adj_nbr_tables[nh_proto][sw_if_index] = |
Neale Ranns | 20aec3d | 2020-05-25 09:09:36 +0000 | [diff] [blame] | 75 | hash_create_mem(0, sizeof(adj_nbr_key_t), sizeof(adj_index_t)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 76 | } |
| 77 | |
| 78 | ADJ_NBR_SET_KEY(kv, link_type, nh_addr); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 79 | |
Neale Ranns | 20aec3d | 2020-05-25 09:09:36 +0000 | [diff] [blame] | 80 | hash_set_mem_alloc (&adj_nbr_tables[nh_proto][sw_if_index], |
| 81 | &kv, adj_index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 82 | } |
| 83 | |
| 84 | void |
Neale Ranns | 177bbdc | 2016-11-15 09:46:51 +0000 | [diff] [blame] | 85 | adj_nbr_remove (adj_index_t ai, |
| 86 | fib_protocol_t nh_proto, |
Neale Ranns | 924d03a | 2016-10-19 08:25:46 +0100 | [diff] [blame] | 87 | vnet_link_t link_type, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 88 | const ip46_address_t *nh_addr, |
| 89 | u32 sw_if_index) |
| 90 | { |
Neale Ranns | 20aec3d | 2020-05-25 09:09:36 +0000 | [diff] [blame] | 91 | adj_nbr_key_t kv; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 92 | |
Benoît Ganne | faec38f | 2020-08-13 11:16:56 +0200 | [diff] [blame] | 93 | ADJ_NBR_ASSERT_NH_PROTO (nh_proto,); |
| 94 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 95 | if (!ADJ_NBR_ITF_OK(nh_proto, sw_if_index)) |
| 96 | return; |
| 97 | |
| 98 | ADJ_NBR_SET_KEY(kv, link_type, nh_addr); |
| 99 | |
Neale Ranns | 20aec3d | 2020-05-25 09:09:36 +0000 | [diff] [blame] | 100 | hash_unset_mem_free(&adj_nbr_tables[nh_proto][sw_if_index], &kv); |
| 101 | |
| 102 | if (0 == hash_elts(adj_nbr_tables[nh_proto][sw_if_index])) |
| 103 | { |
| 104 | hash_free(adj_nbr_tables[nh_proto][sw_if_index]); |
| 105 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 106 | } |
| 107 | |
Neale Ranns | 6fdcc3d | 2021-10-08 07:30:47 +0000 | [diff] [blame] | 108 | typedef struct adj_nbr_get_n_adjs_walk_ctx_t_ |
| 109 | { |
| 110 | vnet_link_t linkt; |
| 111 | u32 count; |
| 112 | } adj_nbr_get_n_adjs_walk_ctx_t; |
| 113 | |
| 114 | static adj_walk_rc_t |
| 115 | adj_nbr_get_n_adjs_walk (adj_index_t ai, |
| 116 | void *data) |
| 117 | { |
| 118 | adj_nbr_get_n_adjs_walk_ctx_t *ctx = data; |
| 119 | const ip_adjacency_t *adj; |
| 120 | |
| 121 | adj = adj_get(ai); |
| 122 | |
| 123 | if (ctx->linkt == adj->ia_link) |
| 124 | ctx->count++; |
| 125 | |
| 126 | return (ADJ_WALK_RC_CONTINUE); |
| 127 | } |
| 128 | |
| 129 | u32 |
| 130 | adj_nbr_get_n_adjs (vnet_link_t link_type, u32 sw_if_index) |
| 131 | { |
| 132 | adj_nbr_get_n_adjs_walk_ctx_t ctx = { |
| 133 | .linkt = link_type, |
| 134 | }; |
| 135 | fib_protocol_t fproto; |
| 136 | |
| 137 | FOR_EACH_FIB_IP_PROTOCOL(fproto) |
| 138 | { |
| 139 | adj_nbr_walk (sw_if_index, |
| 140 | fproto, |
| 141 | adj_nbr_get_n_adjs_walk, |
| 142 | &ctx); |
| 143 | } |
| 144 | |
| 145 | return (ctx.count); |
| 146 | } |
| 147 | |
Florin Coras | f9d0568 | 2018-04-26 08:26:52 -0700 | [diff] [blame] | 148 | adj_index_t |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 149 | adj_nbr_find (fib_protocol_t nh_proto, |
Neale Ranns | 924d03a | 2016-10-19 08:25:46 +0100 | [diff] [blame] | 150 | vnet_link_t link_type, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 151 | const ip46_address_t *nh_addr, |
| 152 | u32 sw_if_index) |
| 153 | { |
Neale Ranns | 20aec3d | 2020-05-25 09:09:36 +0000 | [diff] [blame] | 154 | adj_nbr_key_t kv; |
| 155 | uword *p; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 156 | |
Benoît Ganne | faec38f | 2020-08-13 11:16:56 +0200 | [diff] [blame] | 157 | ADJ_NBR_ASSERT_NH_PROTO (nh_proto, ADJ_INDEX_INVALID); |
| 158 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 159 | ADJ_NBR_SET_KEY(kv, link_type, nh_addr); |
| 160 | |
| 161 | if (!ADJ_NBR_ITF_OK(nh_proto, sw_if_index)) |
| 162 | return (ADJ_INDEX_INVALID); |
| 163 | |
Neale Ranns | 20aec3d | 2020-05-25 09:09:36 +0000 | [diff] [blame] | 164 | p = hash_get_mem(adj_nbr_tables[nh_proto][sw_if_index], &kv); |
| 165 | |
| 166 | if (p) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 167 | { |
Neale Ranns | 20aec3d | 2020-05-25 09:09:36 +0000 | [diff] [blame] | 168 | return (p[0]); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 169 | } |
Neale Ranns | 20aec3d | 2020-05-25 09:09:36 +0000 | [diff] [blame] | 170 | return (ADJ_INDEX_INVALID); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 171 | } |
| 172 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 173 | static inline u32 |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 174 | adj_get_nd_node (fib_protocol_t proto) |
| 175 | { |
| 176 | switch (proto) { |
| 177 | case FIB_PROTOCOL_IP4: |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 178 | return (ip4_arp_node.index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 179 | case FIB_PROTOCOL_IP6: |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 180 | return (ip6_discover_neighbor_node.index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 181 | case FIB_PROTOCOL_MPLS: |
| 182 | break; |
| 183 | } |
| 184 | ASSERT(0); |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 185 | return (ip4_arp_node.index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 186 | } |
| 187 | |
AkshayaNadahalli | 17f5f60 | 2017-03-27 14:47:41 +0530 | [diff] [blame] | 188 | /** |
| 189 | * @brief Check and set feature flags if o/p interface has any o/p features. |
| 190 | */ |
| 191 | static void |
| 192 | adj_nbr_evaluate_feature (adj_index_t ai) |
| 193 | { |
| 194 | ip_adjacency_t *adj; |
| 195 | vnet_feature_main_t *fm = &feature_main; |
| 196 | i16 feature_count; |
| 197 | u8 arc_index; |
| 198 | u32 sw_if_index; |
| 199 | |
| 200 | adj = adj_get(ai); |
| 201 | |
| 202 | switch (adj->ia_link) |
| 203 | { |
| 204 | case VNET_LINK_IP4: |
| 205 | arc_index = ip4_main.lookup_main.output_feature_arc_index; |
| 206 | break; |
| 207 | case VNET_LINK_IP6: |
| 208 | arc_index = ip6_main.lookup_main.output_feature_arc_index; |
| 209 | break; |
| 210 | case VNET_LINK_MPLS: |
| 211 | arc_index = mpls_main.output_feature_arc_index; |
| 212 | break; |
| 213 | default: |
| 214 | return; |
| 215 | } |
| 216 | |
| 217 | sw_if_index = adj->rewrite_header.sw_if_index; |
AkshayaNadahalli | 98ab091 | 2017-03-27 17:21:05 +0000 | [diff] [blame] | 218 | if (vec_len(fm->feature_count_by_sw_if_index[arc_index]) > sw_if_index) |
| 219 | { |
| 220 | feature_count = fm->feature_count_by_sw_if_index[arc_index][sw_if_index]; |
| 221 | if (feature_count > 0) |
Neale Ranns | 4ec36c5 | 2020-03-31 09:21:29 -0400 | [diff] [blame] | 222 | { |
| 223 | vnet_feature_config_main_t *cm; |
AkshayaNadahalli | 17f5f60 | 2017-03-27 14:47:41 +0530 | [diff] [blame] | 224 | |
Neale Ranns | 4ec36c5 | 2020-03-31 09:21:29 -0400 | [diff] [blame] | 225 | adj->rewrite_header.flags |= VNET_REWRITE_HAS_FEATURES; |
| 226 | cm = &fm->feature_config_mains[arc_index]; |
| 227 | |
| 228 | adj->ia_cfg_index = vec_elt (cm->config_index_by_sw_if_index, |
| 229 | sw_if_index); |
| 230 | } |
| 231 | } |
AkshayaNadahalli | 17f5f60 | 2017-03-27 14:47:41 +0530 | [diff] [blame] | 232 | return; |
| 233 | } |
| 234 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 235 | static ip_adjacency_t* |
| 236 | adj_nbr_alloc (fib_protocol_t nh_proto, |
Neale Ranns | 924d03a | 2016-10-19 08:25:46 +0100 | [diff] [blame] | 237 | vnet_link_t link_type, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 238 | const ip46_address_t *nh_addr, |
| 239 | u32 sw_if_index) |
| 240 | { |
| 241 | ip_adjacency_t *adj; |
| 242 | |
| 243 | adj = adj_alloc(nh_proto); |
| 244 | |
| 245 | adj_nbr_insert(nh_proto, link_type, nh_addr, |
| 246 | sw_if_index, |
Neale Ranns | 6c3ebcc | 2016-10-02 21:20:15 +0100 | [diff] [blame] | 247 | adj_get_index(adj)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 248 | |
| 249 | /* |
| 250 | * since we just added the ADJ we have no rewrite string for it, |
| 251 | * so its for ARP |
| 252 | */ |
| 253 | adj->lookup_next_index = IP_LOOKUP_NEXT_ARP; |
| 254 | adj->sub_type.nbr.next_hop = *nh_addr; |
| 255 | adj->ia_link = link_type; |
| 256 | adj->ia_nh_proto = nh_proto; |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 257 | adj->rewrite_header.sw_if_index = sw_if_index; |
Neale Ranns | 1bce5a9 | 2018-10-30 06:34:25 -0700 | [diff] [blame] | 258 | vnet_rewrite_update_mtu(vnet_get_main(), adj->ia_link, |
| 259 | &adj->rewrite_header); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 260 | |
AkshayaNadahalli | 17f5f60 | 2017-03-27 14:47:41 +0530 | [diff] [blame] | 261 | adj_nbr_evaluate_feature (adj_get_index(adj)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 262 | return (adj); |
| 263 | } |
| 264 | |
Neale Ranns | 8f5fef2 | 2020-12-21 08:29:34 +0000 | [diff] [blame] | 265 | void |
| 266 | adj_nbr_set_mtu (adj_index_t adj_index, u16 mtu) |
| 267 | { |
| 268 | ip_adjacency_t *adj; |
| 269 | |
| 270 | ASSERT(ADJ_INDEX_INVALID != adj_index); |
| 271 | |
| 272 | adj = adj_get(adj_index); |
| 273 | |
| 274 | if (0 == mtu) |
| 275 | vnet_rewrite_update_mtu(vnet_get_main(), adj->ia_link, |
| 276 | &adj->rewrite_header); |
| 277 | else |
| 278 | { |
| 279 | vnet_rewrite_update_mtu(vnet_get_main(), adj->ia_link, |
| 280 | &adj->rewrite_header); |
| 281 | adj->rewrite_header.max_l3_packet_bytes = |
| 282 | clib_min (adj->rewrite_header.max_l3_packet_bytes, mtu); |
| 283 | } |
| 284 | } |
| 285 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 286 | /* |
Neale Ranns | 32e1c01 | 2016-11-22 17:07:28 +0000 | [diff] [blame] | 287 | * adj_nbr_add_or_lock |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 288 | * |
| 289 | * Add an adjacency for the neighbour requested. |
| 290 | * |
| 291 | * The key for an adj is: |
| 292 | * - the Next-hops protocol (i.e. v4 or v6) |
| 293 | * - the address of the next-hop |
| 294 | * - the interface the next-hop is reachable through |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 295 | */ |
| 296 | adj_index_t |
| 297 | adj_nbr_add_or_lock (fib_protocol_t nh_proto, |
Neale Ranns | 924d03a | 2016-10-19 08:25:46 +0100 | [diff] [blame] | 298 | vnet_link_t link_type, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 299 | const ip46_address_t *nh_addr, |
| 300 | u32 sw_if_index) |
| 301 | { |
| 302 | adj_index_t adj_index; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 303 | |
| 304 | adj_index = adj_nbr_find(nh_proto, link_type, nh_addr, sw_if_index); |
| 305 | |
| 306 | if (ADJ_INDEX_INVALID == adj_index) |
| 307 | { |
Neale Ranns | 77cfc01 | 2019-12-15 22:26:37 +0000 | [diff] [blame] | 308 | ip_adjacency_t *adj; |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 309 | vnet_main_t *vnm; |
| 310 | |
| 311 | vnm = vnet_get_main(); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 312 | 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] | 313 | adj_index = adj_get_index(adj); |
| 314 | adj_lock(adj_index); |
| 315 | |
Neale Ranns | 1855b8e | 2018-07-11 10:31:26 -0700 | [diff] [blame] | 316 | if (ip46_address_is_equal(&ADJ_BCAST_ADDR, nh_addr)) |
| 317 | { |
| 318 | adj->lookup_next_index = IP_LOOKUP_NEXT_BCAST; |
| 319 | } |
| 320 | |
Ole Troan | d723161 | 2018-06-07 10:17:57 +0200 | [diff] [blame] | 321 | vnet_rewrite_init(vnm, sw_if_index, link_type, |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 322 | adj_get_nd_node(nh_proto), |
| 323 | vnet_tx_node_index_for_sw_interface(vnm, sw_if_index), |
| 324 | &adj->rewrite_header); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 325 | |
| 326 | /* |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 327 | * we need a rewrite where the destination IP address is converted |
| 328 | * to the appropriate link-layer address. This is interface specific. |
| 329 | * So ask the interface to do it. |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 330 | */ |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 331 | vnet_update_adjacency_for_sw_interface(vnm, sw_if_index, adj_index); |
Neale Ranns | 8f5fef2 | 2020-12-21 08:29:34 +0000 | [diff] [blame] | 332 | adj_delegate_adj_created(adj_get(adj_index)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 333 | } |
| 334 | else |
| 335 | { |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 336 | adj_lock(adj_index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 337 | } |
| 338 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 339 | return (adj_index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 340 | } |
| 341 | |
| 342 | adj_index_t |
| 343 | adj_nbr_add_or_lock_w_rewrite (fib_protocol_t nh_proto, |
Neale Ranns | 924d03a | 2016-10-19 08:25:46 +0100 | [diff] [blame] | 344 | vnet_link_t link_type, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 345 | const ip46_address_t *nh_addr, |
| 346 | u32 sw_if_index, |
| 347 | u8 *rewrite) |
| 348 | { |
| 349 | adj_index_t adj_index; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 350 | |
| 351 | adj_index = adj_nbr_find(nh_proto, link_type, nh_addr, sw_if_index); |
| 352 | |
| 353 | if (ADJ_INDEX_INVALID == adj_index) |
| 354 | { |
Neale Ranns | 13a08cc | 2018-11-07 09:25:54 -0800 | [diff] [blame] | 355 | ip_adjacency_t *adj; |
| 356 | |
| 357 | 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] | 358 | adj->rewrite_header.sw_if_index = sw_if_index; |
Neale Ranns | 13a08cc | 2018-11-07 09:25:54 -0800 | [diff] [blame] | 359 | adj_index = adj_get_index(adj); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 360 | } |
| 361 | |
Neale Ranns | 13a08cc | 2018-11-07 09:25:54 -0800 | [diff] [blame] | 362 | adj_lock(adj_index); |
| 363 | adj_nbr_update_rewrite(adj_index, |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 364 | ADJ_NBR_REWRITE_FLAG_COMPLETE, |
| 365 | rewrite); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 366 | |
Neale Ranns | 77cfc01 | 2019-12-15 22:26:37 +0000 | [diff] [blame] | 367 | adj_delegate_adj_created(adj_get(adj_index)); |
| 368 | |
Neale Ranns | 13a08cc | 2018-11-07 09:25:54 -0800 | [diff] [blame] | 369 | return (adj_index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 370 | } |
| 371 | |
| 372 | /** |
| 373 | * adj_nbr_update_rewrite |
| 374 | * |
| 375 | * Update the adjacency's rewrite string. A NULL string implies the |
Jim Thompson | f324dec | 2019-04-08 03:22:21 -0500 | [diff] [blame] | 376 | * rewrite is reset (i.e. when ARP/ND entry is gone). |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 377 | * NB: the adj being updated may be handling traffic in the DP. |
| 378 | */ |
| 379 | void |
| 380 | adj_nbr_update_rewrite (adj_index_t adj_index, |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 381 | adj_nbr_rewrite_flag_t flags, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 382 | u8 *rewrite) |
| 383 | { |
| 384 | ip_adjacency_t *adj; |
| 385 | |
| 386 | ASSERT(ADJ_INDEX_INVALID != adj_index); |
| 387 | |
| 388 | adj = adj_get(adj_index); |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 389 | |
| 390 | if (flags & ADJ_NBR_REWRITE_FLAG_COMPLETE) |
| 391 | { |
| 392 | /* |
| 393 | * update the adj's rewrite string and build the arc |
| 394 | * from the rewrite node to the interface's TX node |
| 395 | */ |
| 396 | adj_nbr_update_rewrite_internal(adj, IP_LOOKUP_NEXT_REWRITE, |
| 397 | adj_get_rewrite_node(adj->ia_link), |
| 398 | vnet_tx_node_index_for_sw_interface( |
| 399 | vnet_get_main(), |
| 400 | adj->rewrite_header.sw_if_index), |
| 401 | rewrite); |
| 402 | } |
| 403 | else |
| 404 | { |
| 405 | adj_nbr_update_rewrite_internal(adj, IP_LOOKUP_NEXT_ARP, |
| 406 | adj_get_nd_node(adj->ia_nh_proto), |
| 407 | vnet_tx_node_index_for_sw_interface( |
| 408 | vnet_get_main(), |
| 409 | adj->rewrite_header.sw_if_index), |
| 410 | rewrite); |
| 411 | } |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 412 | } |
| 413 | |
| 414 | /** |
| 415 | * adj_nbr_update_rewrite_internal |
| 416 | * |
| 417 | * Update the adjacency's rewrite string. A NULL string implies the |
Jim Thompson | f324dec | 2019-04-08 03:22:21 -0500 | [diff] [blame] | 418 | * rewrite is reset (i.e. when ARP/ND entry is gone). |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 419 | * NB: the adj being updated may be handling traffic in the DP. |
| 420 | */ |
| 421 | void |
| 422 | adj_nbr_update_rewrite_internal (ip_adjacency_t *adj, |
Neale Ranns | fa5d198 | 2017-02-20 14:19:51 -0800 | [diff] [blame] | 423 | ip_lookup_next_t adj_next_index, |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 424 | u32 this_node, |
| 425 | u32 next_node, |
| 426 | u8 *rewrite) |
| 427 | { |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 428 | ip_adjacency_t *walk_adj; |
Neale Ranns | 66300f6 | 2020-01-12 21:16:55 +0000 | [diff] [blame] | 429 | adj_index_t walk_ai, ai; |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 430 | vlib_main_t * vm; |
| 431 | u32 old_next; |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 432 | int do_walk; |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 433 | |
| 434 | vm = vlib_get_main(); |
| 435 | old_next = adj->lookup_next_index; |
| 436 | |
Neale Ranns | 66300f6 | 2020-01-12 21:16:55 +0000 | [diff] [blame] | 437 | ai = walk_ai = adj_get_index(adj); |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 438 | if (VNET_LINK_MPLS == adj->ia_link) |
| 439 | { |
| 440 | /* |
| 441 | * The link type MPLS has no children in the control plane graph, it only |
Paul Vinciguerra | 8feeaff | 2019-03-27 11:25:48 -0700 | [diff] [blame] | 442 | * has children in the data-plane graph. The backwalk is up the former. |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 443 | * So we need to walk from its IP cousin. |
| 444 | */ |
| 445 | walk_ai = adj_nbr_find(adj->ia_nh_proto, |
| 446 | fib_proto_to_link(adj->ia_nh_proto), |
| 447 | &adj->sub_type.nbr.next_hop, |
| 448 | adj->rewrite_header.sw_if_index); |
| 449 | } |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 450 | |
| 451 | /* |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 452 | * Don't call the walk re-entrantly |
| 453 | */ |
| 454 | if (ADJ_INDEX_INVALID != walk_ai) |
| 455 | { |
| 456 | walk_adj = adj_get(walk_ai); |
Neale Ranns | fa5d198 | 2017-02-20 14:19:51 -0800 | [diff] [blame] | 457 | if (ADJ_FLAG_SYNC_WALK_ACTIVE & walk_adj->ia_flags) |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 458 | { |
| 459 | do_walk = 0; |
| 460 | } |
| 461 | else |
| 462 | { |
| 463 | /* |
| 464 | * Prevent re-entrant walk of the same adj |
| 465 | */ |
Neale Ranns | fa5d198 | 2017-02-20 14:19:51 -0800 | [diff] [blame] | 466 | walk_adj->ia_flags |= ADJ_FLAG_SYNC_WALK_ACTIVE; |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 467 | do_walk = 1; |
| 468 | } |
| 469 | } |
| 470 | else |
| 471 | { |
| 472 | do_walk = 0; |
| 473 | } |
| 474 | |
| 475 | /* |
| 476 | * lock the adjacencies that are affected by updates this walk will provoke. |
| 477 | * Since the aim of the walk is to update children to link to a different |
| 478 | * DPO, this adj will no longer be in use and its lock count will drop to 0. |
Paul Vinciguerra | 8feeaff | 2019-03-27 11:25:48 -0700 | [diff] [blame] | 479 | * We don't want it to be deleted as part of this endeavour. |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 480 | */ |
Neale Ranns | 66300f6 | 2020-01-12 21:16:55 +0000 | [diff] [blame] | 481 | adj_lock(ai); |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 482 | adj_lock(walk_ai); |
| 483 | |
| 484 | /* |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 485 | * Updating a rewrite string is not atomic; |
| 486 | * - the rewrite string is too long to write in one instruction |
| 487 | * - when swapping from incomplete to complete, we also need to update |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 488 | * the VLIB graph next-index of the adj. |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 489 | * ideally we would only want to suspend forwarding via this adj whilst we |
| 490 | * do this, but we do not have that level of granularity - it's suspend all |
| 491 | * worker threads or nothing. |
Paul Vinciguerra | 8feeaff | 2019-03-27 11:25:48 -0700 | [diff] [blame] | 492 | * The other choices are: |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 493 | * - to mark the adj down and back walk so child load-balances drop this adj |
| 494 | * from the set. |
| 495 | * - update the next_node index of this adj to point to error-drop |
| 496 | * 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] | 497 | * which is not acceptable. However, when the adj changes type (from |
| 498 | * complete to incomplete and vice-versa) the child DPOs, which have the |
| 499 | * VLIB graph next node index, will be sending packets to the wrong graph |
| 500 | * node. So from the options above, updating the next_node of the adj to |
| 501 | * be drop will work, but it relies on each graph node v4/v6/mpls, rewrite/ |
| 502 | * arp/midchain always be valid w.r.t. a mis-match of adj type and node type |
Paul Vinciguerra | 8feeaff | 2019-03-27 11:25:48 -0700 | [diff] [blame] | 503 | * (i.e. a rewrite adj in the arp node). This is not enforceable. Getting it |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 504 | * wrong will lead to hard to find bugs since its a race condition. So we |
| 505 | * choose the more reliable method of updating the children to use the drop, |
| 506 | * then switching adj's type, then updating the children again. Did I mention |
| 507 | * that this doesn't happen often... |
| 508 | * So we need to distinguish between the two cases: |
| 509 | * 1 - mac change |
| 510 | * 2 - adj type change |
| 511 | */ |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 512 | if (do_walk && |
| 513 | old_next != adj_next_index && |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 514 | ADJ_INDEX_INVALID != walk_ai) |
| 515 | { |
| 516 | /* |
| 517 | * the adj is changing type. we need to fix all children so that they |
| 518 | * stack momentarily on a drop, while the adj changes. If we don't do |
| 519 | * this the children will send packets to a VLIB graph node that does |
| 520 | * not correspond to the adj's type - and it goes downhill from there. |
| 521 | */ |
| 522 | fib_node_back_walk_ctx_t bw_ctx = { |
| 523 | .fnbw_reason = FIB_NODE_BW_REASON_FLAG_ADJ_DOWN, |
| 524 | /* |
Paul Vinciguerra | 8feeaff | 2019-03-27 11:25:48 -0700 | [diff] [blame] | 525 | * force this walk to be synchronous. if we don't and a node in the graph |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 526 | * (a heavily shared path-list) chooses to back-ground the walk (make it |
| 527 | * async) then it will pause and we will do the adj update below, before |
| 528 | * all the children are updated. not good. |
| 529 | */ |
| 530 | .fnbw_flags = FIB_NODE_BW_FLAG_FORCE_SYNC, |
| 531 | }; |
| 532 | |
| 533 | fib_walk_sync(FIB_NODE_TYPE_ADJ, walk_ai, &bw_ctx); |
Steven Luong | 3d5f622 | 2020-01-30 09:11:18 -0800 | [diff] [blame] | 534 | /* |
Vladislav Grishenko | 15732f5 | 2021-10-27 00:07:01 +0500 | [diff] [blame^] | 535 | * fib_walk_sync may allocate a new adjacency and potentially cause a |
Steven Luong | 3d5f622 | 2020-01-30 09:11:18 -0800 | [diff] [blame] | 536 | * realloc for adj_pool. When that happens, adj pointer is no longer |
| 537 | * valid here. We refresh the adj pointer accordingly. |
| 538 | */ |
| 539 | adj = adj_get (ai); |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 540 | } |
| 541 | |
| 542 | /* |
| 543 | * If we are just updating the MAC string of the adj (which we also can't |
| 544 | * do atomically), then we need to stop packets switching through the adj. |
| 545 | * We can't do that on a per-adj basis, so it's all the packets. |
| 546 | * If we are updating the type, and we walked back to the children above, |
| 547 | * then this barrier serves to flush the queues/frames. |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 548 | */ |
| 549 | vlib_worker_thread_barrier_sync(vm); |
| 550 | |
| 551 | adj->lookup_next_index = adj_next_index; |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 552 | adj->ia_node_index = this_node; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 553 | |
| 554 | if (NULL != rewrite) |
| 555 | { |
| 556 | /* |
| 557 | * new rewrite provided. |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 558 | * 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] | 559 | */ |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 560 | vnet_rewrite_set_data_internal(&adj->rewrite_header, |
| 561 | sizeof(adj->rewrite_data), |
| 562 | rewrite, |
| 563 | vec_len(rewrite)); |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 564 | vec_free(rewrite); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 565 | } |
| 566 | else |
| 567 | { |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 568 | vnet_rewrite_clear_data_internal(&adj->rewrite_header, |
| 569 | sizeof(adj->rewrite_data)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 570 | } |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 571 | adj->rewrite_header.next_index = vlib_node_add_next(vlib_get_main(), |
| 572 | this_node, |
| 573 | next_node); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 574 | |
| 575 | /* |
Paul Vinciguerra | 8feeaff | 2019-03-27 11:25:48 -0700 | [diff] [blame] | 576 | * done with the rewrite update - let the workers loose. |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 577 | */ |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 578 | vlib_worker_thread_barrier_release(vm); |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 579 | |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 580 | if (do_walk && |
| 581 | (old_next != adj->lookup_next_index) && |
| 582 | (ADJ_INDEX_INVALID != walk_ai)) |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 583 | { |
| 584 | /* |
| 585 | * backwalk to the children so they can stack on the now updated |
| 586 | * adjacency |
| 587 | */ |
| 588 | fib_node_back_walk_ctx_t bw_ctx = { |
| 589 | .fnbw_reason = FIB_NODE_BW_REASON_FLAG_ADJ_UPDATE, |
| 590 | }; |
| 591 | |
| 592 | fib_walk_sync(FIB_NODE_TYPE_ADJ, walk_ai, &bw_ctx); |
| 593 | } |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 594 | /* |
| 595 | * Prevent re-entrant walk of the same adj |
| 596 | */ |
| 597 | if (do_walk) |
| 598 | { |
Neale Ranns | 37157d5 | 2020-01-23 22:46:06 +0000 | [diff] [blame] | 599 | walk_adj = adj_get(walk_ai); |
Neale Ranns | fa5d198 | 2017-02-20 14:19:51 -0800 | [diff] [blame] | 600 | walk_adj->ia_flags &= ~ADJ_FLAG_SYNC_WALK_ACTIVE; |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 601 | } |
| 602 | |
Neale Ranns | e3aeb38 | 2021-12-31 09:18:31 +0000 | [diff] [blame] | 603 | adj_delegate_adj_modified(adj_get(ai)); |
Neale Ranns | 66300f6 | 2020-01-12 21:16:55 +0000 | [diff] [blame] | 604 | adj_unlock(ai); |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 605 | adj_unlock(walk_ai); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 606 | } |
| 607 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 608 | u32 |
| 609 | adj_nbr_db_size (void) |
| 610 | { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 611 | fib_protocol_t proto; |
| 612 | u32 sw_if_index = 0; |
Neale Ranns | 20aec3d | 2020-05-25 09:09:36 +0000 | [diff] [blame] | 613 | u64 count = 0; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 614 | |
| 615 | for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++) |
| 616 | { |
| 617 | vec_foreach_index(sw_if_index, adj_nbr_tables[proto]) |
| 618 | { |
| 619 | if (NULL != adj_nbr_tables[proto][sw_if_index]) |
| 620 | { |
Neale Ranns | 20aec3d | 2020-05-25 09:09:36 +0000 | [diff] [blame] | 621 | count += hash_elts(adj_nbr_tables[proto][sw_if_index]); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 622 | } |
| 623 | } |
| 624 | } |
Neale Ranns | 20aec3d | 2020-05-25 09:09:36 +0000 | [diff] [blame] | 625 | return (count); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 626 | } |
| 627 | |
| 628 | /** |
Neale Ranns | 20aec3d | 2020-05-25 09:09:36 +0000 | [diff] [blame] | 629 | * @brief Walk all adjacencies on a link for a given next-hop protocol |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 630 | */ |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 631 | void |
| 632 | adj_nbr_walk (u32 sw_if_index, |
| 633 | fib_protocol_t adj_nh_proto, |
| 634 | adj_walk_cb_t cb, |
| 635 | void *ctx) |
| 636 | { |
Neale Ranns | 22391fa | 2020-05-29 10:19:41 -0400 | [diff] [blame] | 637 | adj_index_t ai, *ais, *aip; |
Neale Ranns | 20aec3d | 2020-05-25 09:09:36 +0000 | [diff] [blame] | 638 | adj_nbr_key_t *key; |
Neale Ranns | 20aec3d | 2020-05-25 09:09:36 +0000 | [diff] [blame] | 639 | |
Benoît Ganne | faec38f | 2020-08-13 11:16:56 +0200 | [diff] [blame] | 640 | ADJ_NBR_ASSERT_NH_PROTO (adj_nh_proto,); |
| 641 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 642 | if (!ADJ_NBR_ITF_OK(adj_nh_proto, sw_if_index)) |
| 643 | return; |
| 644 | |
Neale Ranns | 22391fa | 2020-05-29 10:19:41 -0400 | [diff] [blame] | 645 | ais = NULL; |
| 646 | |
| 647 | /* elements may be removed from the table during the walk, so |
| 648 | * collect the set first then process them */ |
| 649 | hash_foreach_mem (key, ai, adj_nbr_tables[adj_nh_proto][sw_if_index], |
| 650 | ({ |
| 651 | vec_add1(ais, ai); |
| 652 | })); |
| 653 | |
| 654 | vec_foreach(aip, ais) |
Neale Ranns | 20aec3d | 2020-05-25 09:09:36 +0000 | [diff] [blame] | 655 | { |
Neale Ranns | 22391fa | 2020-05-29 10:19:41 -0400 | [diff] [blame] | 656 | /* An adj may be deleted during the walk so check first */ |
| 657 | if (!pool_is_free_index(adj_pool, *aip)) |
| 658 | cb(*aip, ctx); |
Neale Ranns | 20aec3d | 2020-05-25 09:09:36 +0000 | [diff] [blame] | 659 | } |
Neale Ranns | 22391fa | 2020-05-29 10:19:41 -0400 | [diff] [blame] | 660 | vec_free(ais); |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 661 | } |
| 662 | |
| 663 | /** |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 664 | * @brief Walk adjacencies on a link with a given v4 next-hop. |
| 665 | * that is visit the adjacencies with different link types. |
| 666 | */ |
| 667 | void |
| 668 | adj_nbr_walk_nh4 (u32 sw_if_index, |
| 669 | const ip4_address_t *addr, |
| 670 | adj_walk_cb_t cb, |
| 671 | void *ctx) |
| 672 | { |
| 673 | if (!ADJ_NBR_ITF_OK(FIB_PROTOCOL_IP4, sw_if_index)) |
| 674 | return; |
| 675 | |
| 676 | ip46_address_t nh = { |
| 677 | .ip4 = *addr, |
| 678 | }; |
Neale Ranns | 580bba7 | 2018-04-23 05:31:19 -0700 | [diff] [blame] | 679 | vnet_link_t linkt; |
| 680 | adj_index_t ai; |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 681 | |
Neale Ranns | 580bba7 | 2018-04-23 05:31:19 -0700 | [diff] [blame] | 682 | FOR_EACH_VNET_LINK(linkt) |
| 683 | { |
| 684 | ai = adj_nbr_find (FIB_PROTOCOL_IP4, linkt, &nh, sw_if_index); |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 685 | |
Neale Ranns | 580bba7 | 2018-04-23 05:31:19 -0700 | [diff] [blame] | 686 | if (INDEX_INVALID != ai) |
| 687 | cb(ai, ctx); |
| 688 | } |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 689 | } |
| 690 | |
| 691 | /** |
| 692 | * @brief Walk adjacencies on a link with a given v6 next-hop. |
| 693 | * that is visit the adjacencies with different link types. |
| 694 | */ |
| 695 | void |
| 696 | adj_nbr_walk_nh6 (u32 sw_if_index, |
| 697 | const ip6_address_t *addr, |
| 698 | adj_walk_cb_t cb, |
| 699 | void *ctx) |
| 700 | { |
| 701 | if (!ADJ_NBR_ITF_OK(FIB_PROTOCOL_IP6, sw_if_index)) |
| 702 | return; |
| 703 | |
| 704 | ip46_address_t nh = { |
| 705 | .ip6 = *addr, |
| 706 | }; |
Neale Ranns | 580bba7 | 2018-04-23 05:31:19 -0700 | [diff] [blame] | 707 | vnet_link_t linkt; |
| 708 | adj_index_t ai; |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 709 | |
Neale Ranns | 580bba7 | 2018-04-23 05:31:19 -0700 | [diff] [blame] | 710 | FOR_EACH_VNET_LINK(linkt) |
| 711 | { |
| 712 | ai = adj_nbr_find (FIB_PROTOCOL_IP6, linkt, &nh, sw_if_index); |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 713 | |
Neale Ranns | 580bba7 | 2018-04-23 05:31:19 -0700 | [diff] [blame] | 714 | if (INDEX_INVALID != ai) |
| 715 | cb(ai, ctx); |
| 716 | } |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 717 | } |
| 718 | |
| 719 | /** |
| 720 | * @brief Walk adjacencies on a link with a given next-hop. |
| 721 | * that is visit the adjacencies with different link types. |
| 722 | */ |
| 723 | void |
| 724 | adj_nbr_walk_nh (u32 sw_if_index, |
| 725 | fib_protocol_t adj_nh_proto, |
| 726 | const ip46_address_t *nh, |
| 727 | adj_walk_cb_t cb, |
| 728 | void *ctx) |
| 729 | { |
Benoît Ganne | faec38f | 2020-08-13 11:16:56 +0200 | [diff] [blame] | 730 | ADJ_NBR_ASSERT_NH_PROTO (adj_nh_proto,); |
| 731 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 732 | if (!ADJ_NBR_ITF_OK(adj_nh_proto, sw_if_index)) |
| 733 | return; |
| 734 | |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 735 | switch (adj_nh_proto) |
Neale Ranns | 580bba7 | 2018-04-23 05:31:19 -0700 | [diff] [blame] | 736 | { |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 737 | case FIB_PROTOCOL_IP4: |
| 738 | adj_nbr_walk_nh4(sw_if_index, &nh->ip4, cb, ctx); |
| 739 | break; |
| 740 | case FIB_PROTOCOL_IP6: |
| 741 | adj_nbr_walk_nh6(sw_if_index, &nh->ip6, cb, ctx); |
| 742 | break; |
| 743 | case FIB_PROTOCOL_MPLS: |
| 744 | ASSERT(0); |
| 745 | break; |
Neale Ranns | 580bba7 | 2018-04-23 05:31:19 -0700 | [diff] [blame] | 746 | } |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 747 | } |
| 748 | |
| 749 | /** |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 750 | * Flags associated with the interface state walks |
| 751 | */ |
| 752 | typedef enum adj_nbr_interface_flags_t_ |
| 753 | { |
| 754 | ADJ_NBR_INTERFACE_UP = (1 << 0), |
| 755 | } adj_nbr_interface_flags_t; |
| 756 | |
| 757 | /** |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 758 | * Context for the state change walk of the DB |
| 759 | */ |
| 760 | typedef struct adj_nbr_interface_state_change_ctx_t_ |
| 761 | { |
| 762 | /** |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 763 | * Flags on the interface |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 764 | */ |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 765 | adj_nbr_interface_flags_t flags; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 766 | } adj_nbr_interface_state_change_ctx_t; |
| 767 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 768 | static adj_walk_rc_t |
| 769 | adj_nbr_interface_state_change_one (adj_index_t ai, |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 770 | void *arg) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 771 | { |
| 772 | /* |
| 773 | * Back walk the graph to inform the forwarding entries |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 774 | * that this interface state has changed. Do this synchronously |
| 775 | * since this is the walk that provides convergence |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 776 | */ |
| 777 | adj_nbr_interface_state_change_ctx_t *ctx = arg; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 778 | fib_node_back_walk_ctx_t bw_ctx = { |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 779 | .fnbw_reason = ((ctx->flags & ADJ_NBR_INTERFACE_UP) ? |
| 780 | FIB_NODE_BW_REASON_FLAG_INTERFACE_UP : |
| 781 | FIB_NODE_BW_REASON_FLAG_INTERFACE_DOWN), |
| 782 | /* |
| 783 | * the force sync applies only as far as the first fib_entry. |
| 784 | * And it's the fib_entry's we need to converge away from |
| 785 | * the adjacencies on the now down link |
| 786 | */ |
| 787 | .fnbw_flags = (!(ctx->flags & ADJ_NBR_INTERFACE_UP) ? |
| 788 | FIB_NODE_BW_FLAG_FORCE_SYNC : |
Neale Ranns | 30d5364 | 2018-08-27 07:29:15 -0700 | [diff] [blame] | 789 | FIB_NODE_BW_FLAG_NONE), |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 790 | }; |
Neale Ranns | 30d5364 | 2018-08-27 07:29:15 -0700 | [diff] [blame] | 791 | ip_adjacency_t *adj; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 792 | |
Benoît Ganne | 9f10edb | 2021-06-08 16:25:14 +0200 | [diff] [blame] | 793 | adj_lock (ai); |
| 794 | |
Neale Ranns | 30d5364 | 2018-08-27 07:29:15 -0700 | [diff] [blame] | 795 | adj = adj_get(ai); |
Neale Ranns | 30d5364 | 2018-08-27 07:29:15 -0700 | [diff] [blame] | 796 | adj->ia_flags |= ADJ_FLAG_SYNC_WALK_ACTIVE; |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 797 | fib_walk_sync(FIB_NODE_TYPE_ADJ, ai, &bw_ctx); |
Vladislav Grishenko | 15732f5 | 2021-10-27 00:07:01 +0500 | [diff] [blame^] | 798 | |
| 799 | /* |
| 800 | * fib_walk_sync may allocate a new adjacency and potentially cause a |
| 801 | * realloc for adj_pool. When that happens, adj pointer is no longer |
| 802 | * valid here. We refresh the adj pointer accordingly. |
| 803 | */ |
| 804 | adj = adj_get(ai); |
Neale Ranns | 30d5364 | 2018-08-27 07:29:15 -0700 | [diff] [blame] | 805 | adj->ia_flags &= ~ADJ_FLAG_SYNC_WALK_ACTIVE; |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 806 | |
Benoît Ganne | 9f10edb | 2021-06-08 16:25:14 +0200 | [diff] [blame] | 807 | adj_unlock (ai); |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 808 | return (ADJ_WALK_RC_CONTINUE); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 809 | } |
| 810 | |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 811 | /** |
| 812 | * @brief Registered function for SW interface state changes |
| 813 | */ |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 814 | static clib_error_t * |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 815 | adj_nbr_sw_interface_state_change (vnet_main_t * vnm, |
| 816 | u32 sw_if_index, |
| 817 | u32 flags) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 818 | { |
| 819 | fib_protocol_t proto; |
| 820 | |
| 821 | /* |
| 822 | * walk each adj on the interface and trigger a walk from that adj |
| 823 | */ |
| 824 | for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++) |
| 825 | { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 826 | adj_nbr_interface_state_change_ctx_t ctx = { |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 827 | .flags = ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ? |
| 828 | ADJ_NBR_INTERFACE_UP : |
| 829 | 0), |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 830 | }; |
| 831 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 832 | adj_nbr_walk(sw_if_index, proto, |
| 833 | adj_nbr_interface_state_change_one, |
| 834 | &ctx); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 835 | } |
| 836 | |
| 837 | return (NULL); |
| 838 | } |
| 839 | |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 840 | VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION_PRIO( |
| 841 | adj_nbr_sw_interface_state_change, |
| 842 | VNET_ITF_FUNC_PRIORITY_HIGH); |
| 843 | |
| 844 | /** |
| 845 | * @brief Invoked on each SW interface of a HW interface when the |
| 846 | * HW interface state changes |
| 847 | */ |
Neale Ranns | 0053de6 | 2018-05-22 08:40:52 -0700 | [diff] [blame] | 848 | static walk_rc_t |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 849 | adj_nbr_hw_sw_interface_state_change (vnet_main_t * vnm, |
| 850 | u32 sw_if_index, |
| 851 | void *arg) |
| 852 | { |
| 853 | adj_nbr_interface_state_change_ctx_t *ctx = arg; |
| 854 | fib_protocol_t proto; |
| 855 | |
| 856 | /* |
| 857 | * walk each adj on the interface and trigger a walk from that adj |
| 858 | */ |
| 859 | for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++) |
| 860 | { |
| 861 | adj_nbr_walk(sw_if_index, proto, |
| 862 | adj_nbr_interface_state_change_one, |
| 863 | ctx); |
| 864 | } |
Neale Ranns | 0053de6 | 2018-05-22 08:40:52 -0700 | [diff] [blame] | 865 | return (WALK_CONTINUE); |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 866 | } |
| 867 | |
| 868 | /** |
| 869 | * @brief Registered callback for HW interface state changes |
| 870 | */ |
| 871 | static clib_error_t * |
| 872 | adj_nbr_hw_interface_state_change (vnet_main_t * vnm, |
| 873 | u32 hw_if_index, |
| 874 | u32 flags) |
| 875 | { |
| 876 | /* |
| 877 | * walk SW interface on the HW |
| 878 | */ |
| 879 | adj_nbr_interface_state_change_ctx_t ctx = { |
| 880 | .flags = ((flags & VNET_HW_INTERFACE_FLAG_LINK_UP) ? |
| 881 | ADJ_NBR_INTERFACE_UP : |
| 882 | 0), |
| 883 | }; |
| 884 | |
| 885 | vnet_hw_interface_walk_sw(vnm, hw_if_index, |
| 886 | adj_nbr_hw_sw_interface_state_change, |
| 887 | &ctx); |
| 888 | |
| 889 | return (NULL); |
| 890 | } |
| 891 | |
| 892 | VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION_PRIO( |
| 893 | adj_nbr_hw_interface_state_change, |
| 894 | VNET_ITF_FUNC_PRIORITY_HIGH); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 895 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 896 | static adj_walk_rc_t |
| 897 | adj_nbr_interface_delete_one (adj_index_t ai, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 898 | void *arg) |
| 899 | { |
| 900 | /* |
| 901 | * Back walk the graph to inform the forwarding entries |
| 902 | * that this interface has been deleted. |
| 903 | */ |
| 904 | fib_node_back_walk_ctx_t bw_ctx = { |
| 905 | .fnbw_reason = FIB_NODE_BW_REASON_FLAG_INTERFACE_DELETE, |
| 906 | }; |
Neale Ranns | 30d5364 | 2018-08-27 07:29:15 -0700 | [diff] [blame] | 907 | ip_adjacency_t *adj; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 908 | |
Benoît Ganne | 7391156 | 2019-10-16 15:08:37 +0200 | [diff] [blame] | 909 | adj_lock(ai); |
| 910 | |
Neale Ranns | 30d5364 | 2018-08-27 07:29:15 -0700 | [diff] [blame] | 911 | adj = adj_get(ai); |
Neale Ranns | 30d5364 | 2018-08-27 07:29:15 -0700 | [diff] [blame] | 912 | adj->ia_flags |= ADJ_FLAG_SYNC_WALK_ACTIVE; |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 913 | fib_walk_sync(FIB_NODE_TYPE_ADJ, ai, &bw_ctx); |
Vladislav Grishenko | 15732f5 | 2021-10-27 00:07:01 +0500 | [diff] [blame^] | 914 | |
| 915 | /* |
| 916 | * fib_walk_sync may allocate a new adjacency and potentially cause a |
| 917 | * realloc for adj_pool. When that happens, adj pointer is no longer |
| 918 | * valid here. We refresh the adj pointer accordingly. |
| 919 | */ |
| 920 | adj = adj_get(ai); |
Neale Ranns | 30d5364 | 2018-08-27 07:29:15 -0700 | [diff] [blame] | 921 | adj->ia_flags &= ~ADJ_FLAG_SYNC_WALK_ACTIVE; |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 922 | |
Benoît Ganne | 7391156 | 2019-10-16 15:08:37 +0200 | [diff] [blame] | 923 | adj_unlock(ai); |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 924 | return (ADJ_WALK_RC_CONTINUE); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 925 | } |
| 926 | |
| 927 | /** |
| 928 | * adj_nbr_interface_add_del |
| 929 | * |
| 930 | * Registered to receive interface Add and delete notifications |
| 931 | */ |
| 932 | static clib_error_t * |
| 933 | adj_nbr_interface_add_del (vnet_main_t * vnm, |
| 934 | u32 sw_if_index, |
| 935 | u32 is_add) |
| 936 | { |
| 937 | fib_protocol_t proto; |
| 938 | |
| 939 | if (is_add) |
| 940 | { |
| 941 | /* |
| 942 | * not interested in interface additions. we will not back walk |
| 943 | * to resolve paths through newly added interfaces. Why? The control |
| 944 | * plane should have the brains to add interfaces first, then routes. |
| 945 | * So the case where there are paths with a interface that matches |
| 946 | * one just created is the case where the path resolved through an |
| 947 | * interface that was deleted, and still has not been removed. The |
| 948 | * new interface added, is NO GUARANTEE that the interface being |
| 949 | * added now, even though it may have the same sw_if_index, is the |
| 950 | * same interface that the path needs. So tough! |
| 951 | * If the control plane wants these routes to resolve it needs to |
| 952 | * remove and add them again. |
| 953 | */ |
| 954 | return (NULL); |
| 955 | } |
| 956 | |
| 957 | for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++) |
| 958 | { |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 959 | adj_nbr_walk(sw_if_index, proto, |
| 960 | adj_nbr_interface_delete_one, |
| 961 | NULL); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 962 | } |
| 963 | |
| 964 | return (NULL); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 965 | } |
| 966 | |
| 967 | VNET_SW_INTERFACE_ADD_DEL_FUNCTION(adj_nbr_interface_add_del); |
| 968 | |
| 969 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 970 | static adj_walk_rc_t |
Neale Ranns | ea8adf7 | 2021-08-13 08:10:59 +0000 | [diff] [blame] | 971 | adj_nbr_ethernet_mac_change_one (adj_index_t ai, |
| 972 | void *arg) |
| 973 | { |
| 974 | vnet_update_adjacency_for_sw_interface(vnet_get_main(), |
| 975 | adj_get_sw_if_index(ai), |
| 976 | ai); |
| 977 | |
| 978 | return (ADJ_WALK_RC_CONTINUE); |
| 979 | } |
| 980 | |
| 981 | /** |
| 982 | * Callback function invoked when an interface's MAC Address changes |
| 983 | */ |
| 984 | static void |
| 985 | adj_nbr_ethernet_change_mac (ethernet_main_t * em, |
| 986 | u32 sw_if_index, uword opaque) |
| 987 | { |
| 988 | fib_protocol_t proto; |
| 989 | |
| 990 | FOR_EACH_FIB_IP_PROTOCOL(proto) |
| 991 | { |
| 992 | adj_nbr_walk(sw_if_index, proto, |
| 993 | adj_nbr_ethernet_mac_change_one, |
| 994 | NULL); |
| 995 | } |
| 996 | } |
| 997 | |
| 998 | static adj_walk_rc_t |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 999 | adj_nbr_show_one (adj_index_t ai, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1000 | void *arg) |
| 1001 | { |
| 1002 | vlib_cli_output (arg, "[@%d] %U", |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 1003 | ai, |
| 1004 | format_ip_adjacency, ai, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1005 | FORMAT_IP_ADJACENCY_NONE); |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 1006 | |
| 1007 | return (ADJ_WALK_RC_CONTINUE); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1008 | } |
| 1009 | |
| 1010 | static clib_error_t * |
| 1011 | adj_nbr_show (vlib_main_t * vm, |
| 1012 | unformat_input_t * input, |
| 1013 | vlib_cli_command_t * cmd) |
| 1014 | { |
| 1015 | adj_index_t ai = ADJ_INDEX_INVALID; |
Neale Ranns | 14053c9 | 2019-12-29 23:55:18 +0000 | [diff] [blame] | 1016 | ip46_address_t nh = ip46_address_initializer; |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 1017 | u32 sw_if_index = ~0; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1018 | |
| 1019 | while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) |
| 1020 | { |
Neale Ranns | 14053c9 | 2019-12-29 23:55:18 +0000 | [diff] [blame] | 1021 | if (unformat (input, "%U", |
| 1022 | unformat_vnet_sw_interface, vnet_get_main(), |
| 1023 | &sw_if_index)) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1024 | ; |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 1025 | else if (unformat (input, "%U", |
Neale Ranns | 14053c9 | 2019-12-29 23:55:18 +0000 | [diff] [blame] | 1026 | unformat_ip46_address, &nh, IP46_TYPE_ANY)) |
| 1027 | ; |
| 1028 | else if (unformat (input, "%d", &ai)) |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 1029 | ; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1030 | else |
| 1031 | break; |
| 1032 | } |
| 1033 | |
| 1034 | if (ADJ_INDEX_INVALID != ai) |
| 1035 | { |
| 1036 | vlib_cli_output (vm, "[@%d] %U", |
| 1037 | ai, |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 1038 | format_ip_adjacency, ai, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1039 | FORMAT_IP_ADJACENCY_DETAIL); |
| 1040 | } |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 1041 | else if (~0 != sw_if_index) |
| 1042 | { |
| 1043 | fib_protocol_t proto; |
| 1044 | |
Neale Ranns | 14053c9 | 2019-12-29 23:55:18 +0000 | [diff] [blame] | 1045 | if (ip46_address_is_zero(&nh)) |
| 1046 | { |
| 1047 | for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++) |
| 1048 | { |
| 1049 | adj_nbr_walk(sw_if_index, proto, |
| 1050 | adj_nbr_show_one, |
| 1051 | vm); |
| 1052 | } |
| 1053 | } |
| 1054 | else |
| 1055 | { |
| 1056 | proto = (ip46_address_is_ip4(&nh) ? |
| 1057 | FIB_PROTOCOL_IP4 : |
| 1058 | FIB_PROTOCOL_IP6); |
| 1059 | adj_nbr_walk_nh(sw_if_index, proto, &nh, |
| 1060 | adj_nbr_show_one, |
| 1061 | vm); |
| 1062 | } |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 1063 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1064 | else |
| 1065 | { |
| 1066 | fib_protocol_t proto; |
| 1067 | |
| 1068 | for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++) |
| 1069 | { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1070 | vec_foreach_index(sw_if_index, adj_nbr_tables[proto]) |
| 1071 | { |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 1072 | adj_nbr_walk(sw_if_index, proto, |
| 1073 | adj_nbr_show_one, |
| 1074 | vm); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1075 | } |
| 1076 | } |
| 1077 | } |
| 1078 | |
| 1079 | return 0; |
| 1080 | } |
| 1081 | |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 1082 | /*? |
| 1083 | * Show all neighbour adjacencies. |
| 1084 | * @cliexpar |
| 1085 | * @cliexstart{sh adj nbr} |
| 1086 | * [@2] ipv4 via 1.0.0.2 loop0: IP4: 00:00:22:aa:bb:cc -> 00:00:11:aa:bb:cc |
| 1087 | * [@3] mpls via 1.0.0.2 loop0: MPLS_UNICAST: 00:00:22:aa:bb:cc -> 00:00:11:aa:bb:cc |
| 1088 | * [@4] ipv4 via 1.0.0.3 loop0: IP4: 00:00:22:aa:bb:cc -> 00:00:11:aa:bb:cc |
| 1089 | * [@5] mpls via 1.0.0.3 loop0: MPLS_UNICAST: 00:00:22:aa:bb:cc -> 00:00:11:aa:bb:cc |
| 1090 | * @cliexend |
| 1091 | ?*/ |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1092 | VLIB_CLI_COMMAND (ip4_show_fib_command, static) = { |
| 1093 | .path = "show adj nbr", |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 1094 | .short_help = "show adj nbr [<adj_index>] [interface]", |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1095 | .function = adj_nbr_show, |
| 1096 | }; |
| 1097 | |
| 1098 | u8* |
| 1099 | format_adj_nbr_incomplete (u8* s, va_list *ap) |
| 1100 | { |
Billy McFall | cfcf1e2 | 2016-10-14 09:51:49 -0400 | [diff] [blame] | 1101 | index_t index = va_arg(*ap, index_t); |
| 1102 | CLIB_UNUSED(u32 indent) = va_arg(*ap, u32); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1103 | vnet_main_t * vnm = vnet_get_main(); |
| 1104 | ip_adjacency_t * adj = adj_get(index); |
| 1105 | |
Neale Ranns | 924d03a | 2016-10-19 08:25:46 +0100 | [diff] [blame] | 1106 | s = format (s, "arp-%U", format_vnet_link, adj->ia_link); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1107 | s = format (s, ": via %U", |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 1108 | format_ip46_address, &adj->sub_type.nbr.next_hop, |
| 1109 | adj_proto_to_46(adj->ia_nh_proto)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1110 | s = format (s, " %U", |
Steven | 70488ab | 2018-03-28 17:59:00 -0700 | [diff] [blame] | 1111 | format_vnet_sw_if_index_name, |
| 1112 | vnm, adj->rewrite_header.sw_if_index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1113 | |
| 1114 | return (s); |
| 1115 | } |
| 1116 | |
| 1117 | u8* |
| 1118 | format_adj_nbr (u8* s, va_list *ap) |
| 1119 | { |
Billy McFall | cfcf1e2 | 2016-10-14 09:51:49 -0400 | [diff] [blame] | 1120 | index_t index = va_arg(*ap, index_t); |
| 1121 | CLIB_UNUSED(u32 indent) = va_arg(*ap, u32); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1122 | ip_adjacency_t * adj = adj_get(index); |
| 1123 | |
Neale Ranns | 924d03a | 2016-10-19 08:25:46 +0100 | [diff] [blame] | 1124 | s = format (s, "%U", format_vnet_link, adj->ia_link); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1125 | s = format (s, " via %U ", |
Neale Ranns | b80c536 | 2016-10-08 13:03:40 +0100 | [diff] [blame] | 1126 | format_ip46_address, &adj->sub_type.nbr.next_hop, |
| 1127 | adj_proto_to_46(adj->ia_nh_proto)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1128 | s = format (s, "%U", |
| 1129 | format_vnet_rewrite, |
Neale Ranns | b069a69 | 2017-03-15 12:34:25 -0400 | [diff] [blame] | 1130 | &adj->rewrite_header, sizeof (adj->rewrite_data), 0); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1131 | |
| 1132 | return (s); |
| 1133 | } |
| 1134 | |
| 1135 | static void |
| 1136 | adj_dpo_lock (dpo_id_t *dpo) |
| 1137 | { |
| 1138 | adj_lock(dpo->dpoi_index); |
| 1139 | } |
| 1140 | static void |
| 1141 | adj_dpo_unlock (dpo_id_t *dpo) |
| 1142 | { |
| 1143 | adj_unlock(dpo->dpoi_index); |
| 1144 | } |
| 1145 | |
Neale Ranns | 6c3ebcc | 2016-10-02 21:20:15 +0100 | [diff] [blame] | 1146 | static void |
| 1147 | adj_mem_show (void) |
| 1148 | { |
| 1149 | fib_show_memory_usage("Adjacency", |
| 1150 | pool_elts(adj_pool), |
| 1151 | pool_len(adj_pool), |
| 1152 | sizeof(ip_adjacency_t)); |
| 1153 | } |
| 1154 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1155 | const static dpo_vft_t adj_nbr_dpo_vft = { |
| 1156 | .dv_lock = adj_dpo_lock, |
| 1157 | .dv_unlock = adj_dpo_unlock, |
| 1158 | .dv_format = format_adj_nbr, |
Neale Ranns | 6c3ebcc | 2016-10-02 21:20:15 +0100 | [diff] [blame] | 1159 | .dv_mem_show = adj_mem_show, |
Andrew Yourtchenko | 5f3fcb9 | 2017-10-25 05:50:37 -0700 | [diff] [blame] | 1160 | .dv_get_urpf = adj_dpo_get_urpf, |
Neale Ranns | 8f5fef2 | 2020-12-21 08:29:34 +0000 | [diff] [blame] | 1161 | .dv_get_mtu = adj_dpo_get_mtu, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1162 | }; |
| 1163 | const static dpo_vft_t adj_nbr_incompl_dpo_vft = { |
| 1164 | .dv_lock = adj_dpo_lock, |
| 1165 | .dv_unlock = adj_dpo_unlock, |
| 1166 | .dv_format = format_adj_nbr_incomplete, |
Andrew Yourtchenko | 5f3fcb9 | 2017-10-25 05:50:37 -0700 | [diff] [blame] | 1167 | .dv_get_urpf = adj_dpo_get_urpf, |
Neale Ranns | 8f5fef2 | 2020-12-21 08:29:34 +0000 | [diff] [blame] | 1168 | .dv_get_mtu = adj_dpo_get_mtu, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1169 | }; |
| 1170 | |
| 1171 | /** |
| 1172 | * @brief The per-protocol VLIB graph nodes that are assigned to an adjacency |
| 1173 | * object. |
| 1174 | * |
| 1175 | * this means that these graph nodes are ones from which a nbr is the |
| 1176 | * parent object in the DPO-graph. |
| 1177 | */ |
| 1178 | const static char* const nbr_ip4_nodes[] = |
| 1179 | { |
Neale Ranns | f06aea5 | 2016-11-29 06:51:37 -0800 | [diff] [blame] | 1180 | "ip4-rewrite", |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1181 | NULL, |
| 1182 | }; |
| 1183 | const static char* const nbr_ip6_nodes[] = |
| 1184 | { |
| 1185 | "ip6-rewrite", |
| 1186 | NULL, |
| 1187 | }; |
| 1188 | const static char* const nbr_mpls_nodes[] = |
| 1189 | { |
| 1190 | "mpls-output", |
| 1191 | NULL, |
| 1192 | }; |
Neale Ranns | 5e575b1 | 2016-10-03 09:40:25 +0100 | [diff] [blame] | 1193 | const static char* const nbr_ethernet_nodes[] = |
| 1194 | { |
| 1195 | "adj-l2-rewrite", |
| 1196 | NULL, |
| 1197 | }; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1198 | const static char* const * const nbr_nodes[DPO_PROTO_NUM] = |
| 1199 | { |
| 1200 | [DPO_PROTO_IP4] = nbr_ip4_nodes, |
| 1201 | [DPO_PROTO_IP6] = nbr_ip6_nodes, |
| 1202 | [DPO_PROTO_MPLS] = nbr_mpls_nodes, |
Neale Ranns | 5e575b1 | 2016-10-03 09:40:25 +0100 | [diff] [blame] | 1203 | [DPO_PROTO_ETHERNET] = nbr_ethernet_nodes, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1204 | }; |
| 1205 | |
| 1206 | const static char* const nbr_incomplete_ip4_nodes[] = |
| 1207 | { |
| 1208 | "ip4-arp", |
| 1209 | NULL, |
| 1210 | }; |
| 1211 | const static char* const nbr_incomplete_ip6_nodes[] = |
| 1212 | { |
| 1213 | "ip6-discover-neighbor", |
| 1214 | NULL, |
| 1215 | }; |
| 1216 | const static char* const nbr_incomplete_mpls_nodes[] = |
| 1217 | { |
| 1218 | "mpls-adj-incomplete", |
| 1219 | NULL, |
| 1220 | }; |
| 1221 | |
| 1222 | const static char* const * const nbr_incomplete_nodes[DPO_PROTO_NUM] = |
| 1223 | { |
| 1224 | [DPO_PROTO_IP4] = nbr_incomplete_ip4_nodes, |
| 1225 | [DPO_PROTO_IP6] = nbr_incomplete_ip6_nodes, |
| 1226 | [DPO_PROTO_MPLS] = nbr_incomplete_mpls_nodes, |
| 1227 | }; |
| 1228 | |
| 1229 | void |
| 1230 | adj_nbr_module_init (void) |
| 1231 | { |
| 1232 | dpo_register(DPO_ADJACENCY, |
| 1233 | &adj_nbr_dpo_vft, |
| 1234 | nbr_nodes); |
| 1235 | dpo_register(DPO_ADJACENCY_INCOMPLETE, |
| 1236 | &adj_nbr_incompl_dpo_vft, |
| 1237 | nbr_incomplete_nodes); |
Neale Ranns | ea8adf7 | 2021-08-13 08:10:59 +0000 | [diff] [blame] | 1238 | |
| 1239 | ethernet_address_change_ctx_t ctx = { |
| 1240 | .function = adj_nbr_ethernet_change_mac, |
| 1241 | .function_opaque = 0, |
| 1242 | }; |
| 1243 | vec_add1 (ethernet_main.address_change_callbacks, ctx); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1244 | } |