Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2016 Cisco and/or its affiliates. |
| 3 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | * you may not use this file except in compliance with the License. |
| 5 | * You may obtain a copy of the License at: |
| 6 | * |
| 7 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | * |
| 9 | * Unless required by applicable law or agreed to in writing, software |
| 10 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | * See the License for the specific language governing permissions and |
| 13 | * limitations under the License. |
| 14 | */ |
| 15 | |
| 16 | #include <vlib/vlib.h> |
| 17 | #include <vnet/ip/format.h> |
| 18 | #include <vnet/ip/lookup.h> |
| 19 | #include <vnet/adj/adj.h> |
| 20 | #include <vnet/dpo/load_balance.h> |
| 21 | #include <vnet/dpo/drop_dpo.h> |
| 22 | |
| 23 | #include <vnet/fib/fib_entry.h> |
| 24 | #include <vnet/fib/fib_walk.h> |
| 25 | #include <vnet/fib/fib_entry_src.h> |
| 26 | #include <vnet/fib/fib_entry_cover.h> |
| 27 | #include <vnet/fib/fib_table.h> |
| 28 | #include <vnet/fib/fib_internal.h> |
| 29 | #include <vnet/fib/fib_attached_export.h> |
| 30 | #include <vnet/fib/fib_path_ext.h> |
Neale Ranns | 1f50bf8 | 2019-07-16 15:28:52 +0000 | [diff] [blame] | 31 | #include <vnet/fib/fib_entry_delegate.h> |
| 32 | #include <vnet/fib/fib_entry_track.h> |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 33 | |
| 34 | /* |
| 35 | * Array of strings/names for the FIB sources |
| 36 | */ |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 37 | static const char *fib_attribute_names[] = FIB_ENTRY_ATTRIBUTES; |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 38 | static const char *fib_src_attribute_names[] = FIB_ENTRY_SRC_ATTRIBUTES; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 39 | |
| 40 | /* |
| 41 | * Pool for all fib_entries |
| 42 | */ |
| 43 | static fib_entry_t *fib_entry_pool; |
| 44 | |
Neale Ranns | 710071b | 2018-09-24 12:36:26 +0000 | [diff] [blame] | 45 | /** |
| 46 | * the logger |
| 47 | */ |
| 48 | vlib_log_class_t fib_entry_logger; |
| 49 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 50 | fib_entry_t * |
| 51 | fib_entry_get (fib_node_index_t index) |
| 52 | { |
| 53 | return (pool_elt_at_index(fib_entry_pool, index)); |
| 54 | } |
| 55 | |
| 56 | static fib_node_t * |
| 57 | fib_entry_get_node (fib_node_index_t index) |
| 58 | { |
| 59 | return ((fib_node_t*)fib_entry_get(index)); |
| 60 | } |
| 61 | |
| 62 | fib_node_index_t |
| 63 | fib_entry_get_index (const fib_entry_t * fib_entry) |
| 64 | { |
| 65 | return (fib_entry - fib_entry_pool); |
| 66 | } |
| 67 | |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 68 | fib_protocol_t |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 69 | fib_entry_get_proto (const fib_entry_t * fib_entry) |
| 70 | { |
| 71 | return (fib_entry->fe_prefix.fp_proto); |
| 72 | } |
| 73 | |
Neale Ranns | da78f95 | 2017-05-24 09:15:43 -0700 | [diff] [blame] | 74 | dpo_proto_t |
| 75 | fib_entry_get_dpo_proto (const fib_entry_t * fib_entry) |
| 76 | { |
| 77 | return (fib_proto_to_dpo(fib_entry->fe_prefix.fp_proto)); |
| 78 | } |
| 79 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 80 | fib_forward_chain_type_t |
| 81 | fib_entry_get_default_chain_type (const fib_entry_t *fib_entry) |
| 82 | { |
| 83 | switch (fib_entry->fe_prefix.fp_proto) |
| 84 | { |
| 85 | case FIB_PROTOCOL_IP4: |
| 86 | return (FIB_FORW_CHAIN_TYPE_UNICAST_IP4); |
| 87 | case FIB_PROTOCOL_IP6: |
| 88 | return (FIB_FORW_CHAIN_TYPE_UNICAST_IP6); |
| 89 | case FIB_PROTOCOL_MPLS: |
| 90 | if (MPLS_EOS == fib_entry->fe_prefix.fp_eos) |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 91 | return (FIB_FORW_CHAIN_TYPE_MPLS_EOS); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 92 | else |
| 93 | return (FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS); |
| 94 | } |
| 95 | |
| 96 | return (FIB_FORW_CHAIN_TYPE_UNICAST_IP4); |
| 97 | } |
| 98 | |
| 99 | u8 * |
Neale Ranns | 710071b | 2018-09-24 12:36:26 +0000 | [diff] [blame] | 100 | format_fib_entry_flags (u8 *s, va_list *args) |
| 101 | { |
| 102 | fib_entry_attribute_t attr; |
| 103 | fib_entry_flag_t flag = va_arg(*args, int); |
| 104 | |
| 105 | FOR_EACH_FIB_ATTRIBUTE(attr) { |
| 106 | if ((1<<attr) & flag) { |
| 107 | s = format (s, "%s,", fib_attribute_names[attr]); |
| 108 | } |
| 109 | } |
| 110 | |
| 111 | return (s); |
| 112 | } |
| 113 | |
| 114 | u8 * |
| 115 | format_fib_entry_src_flags (u8 *s, va_list *args) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 116 | { |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 117 | fib_entry_src_attribute_t sattr; |
Neale Ranns | 710071b | 2018-09-24 12:36:26 +0000 | [diff] [blame] | 118 | fib_entry_src_flag_t flag = va_arg(*args, int); |
| 119 | |
| 120 | FOR_EACH_FIB_SRC_ATTRIBUTE(sattr) { |
| 121 | if ((1<<sattr) & flag) { |
| 122 | s = format (s, "%s,", fib_src_attribute_names[sattr]); |
| 123 | } |
| 124 | } |
| 125 | |
| 126 | return (s); |
| 127 | } |
| 128 | |
| 129 | u8 * |
| 130 | format_fib_entry (u8 * s, va_list * args) |
| 131 | { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 132 | fib_forward_chain_type_t fct; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 133 | fib_entry_t *fib_entry; |
| 134 | fib_entry_src_t *src; |
| 135 | fib_node_index_t fei; |
| 136 | fib_source_t source; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 137 | int level; |
| 138 | |
| 139 | fei = va_arg (*args, fib_node_index_t); |
| 140 | level = va_arg (*args, int); |
| 141 | fib_entry = fib_entry_get(fei); |
| 142 | |
| 143 | s = format (s, "%U", format_fib_prefix, &fib_entry->fe_prefix); |
| 144 | |
Neale Ranns | abcf3ea | 2018-03-26 09:10:41 -0700 | [diff] [blame] | 145 | if (level >= FIB_ENTRY_FORMAT_DETAIL) |
| 146 | { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 147 | s = format (s, " fib:%d", fib_entry->fe_fib_index); |
| 148 | s = format (s, " index:%d", fib_entry_get_index(fib_entry)); |
| 149 | s = format (s, " locks:%d", fib_entry->fe_node.fn_locks); |
| 150 | |
| 151 | FOR_EACH_SRC_ADDED(fib_entry, src, source, |
| 152 | ({ |
Neale Ranns | 2297af0 | 2017-09-12 09:45:04 -0700 | [diff] [blame] | 153 | s = format (s, "\n %U", format_fib_source, source); |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 154 | s = format (s, " refs:%d", src->fes_ref_count); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 155 | if (FIB_ENTRY_FLAG_NONE != src->fes_entry_flags) { |
Neale Ranns | 710071b | 2018-09-24 12:36:26 +0000 | [diff] [blame] | 156 | s = format(s, " entry-flags:%U", |
| 157 | format_fib_entry_flags, src->fes_entry_flags); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 158 | } |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 159 | if (FIB_ENTRY_SRC_FLAG_NONE != src->fes_flags) { |
Neale Ranns | 710071b | 2018-09-24 12:36:26 +0000 | [diff] [blame] | 160 | s = format(s, " src-flags:%U", |
| 161 | format_fib_entry_src_flags, src->fes_flags); |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 162 | } |
Neale Ranns | 2303cb1 | 2018-02-21 04:57:17 -0800 | [diff] [blame] | 163 | s = fib_entry_src_format(fib_entry, source, s); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 164 | s = format (s, "\n"); |
| 165 | if (FIB_NODE_INDEX_INVALID != src->fes_pl) |
| 166 | { |
| 167 | s = fib_path_list_format(src->fes_pl, s); |
| 168 | } |
Neale Ranns | 8142499 | 2017-05-18 03:03:22 -0700 | [diff] [blame] | 169 | s = format(s, "%U", format_fib_path_ext_list, &src->fes_path_exts); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 170 | })); |
| 171 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 172 | s = format (s, "\n forwarding: "); |
Neale Ranns | abcf3ea | 2018-03-26 09:10:41 -0700 | [diff] [blame] | 173 | } |
| 174 | else |
| 175 | { |
| 176 | s = format (s, "\n"); |
| 177 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 178 | |
| 179 | fct = fib_entry_get_default_chain_type(fib_entry); |
| 180 | |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 181 | if (!dpo_id_is_valid(&fib_entry->fe_lb)) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 182 | { |
| 183 | s = format (s, " UNRESOLVED\n"); |
| 184 | return (s); |
| 185 | } |
| 186 | else |
| 187 | { |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 188 | s = format(s, " %U-chain\n %U", |
| 189 | format_fib_forw_chain_type, fct, |
| 190 | format_dpo_id, |
| 191 | &fib_entry->fe_lb, |
| 192 | 2); |
| 193 | s = format(s, "\n"); |
| 194 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 195 | if (level >= FIB_ENTRY_FORMAT_DETAIL2) |
| 196 | { |
Neale Ranns | 1f50bf8 | 2019-07-16 15:28:52 +0000 | [diff] [blame] | 197 | index_t *fedi; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 198 | |
Neale Ranns | 88fc83e | 2017-04-05 08:11:14 -0700 | [diff] [blame] | 199 | s = format (s, " Delegates:\n"); |
Neale Ranns | 1f50bf8 | 2019-07-16 15:28:52 +0000 | [diff] [blame] | 200 | vec_foreach(fedi, fib_entry->fe_delegates) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 201 | { |
Neale Ranns | 1f50bf8 | 2019-07-16 15:28:52 +0000 | [diff] [blame] | 202 | s = format(s, " %U\n", format_fib_entry_delegate, *fedi); |
| 203 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 204 | } |
| 205 | } |
| 206 | |
| 207 | if (level >= FIB_ENTRY_FORMAT_DETAIL2) |
| 208 | { |
Neale Ranns | 88fc83e | 2017-04-05 08:11:14 -0700 | [diff] [blame] | 209 | s = format(s, " Children:"); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 210 | s = fib_node_children_format(fib_entry->fe_node.fn_children, s); |
| 211 | } |
| 212 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 213 | return (s); |
| 214 | } |
| 215 | |
| 216 | static fib_entry_t* |
| 217 | fib_entry_from_fib_node (fib_node_t *node) |
| 218 | { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 219 | ASSERT(FIB_NODE_TYPE_ENTRY == node->fn_type); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 220 | return ((fib_entry_t*)node); |
| 221 | } |
| 222 | |
| 223 | static void |
| 224 | fib_entry_last_lock_gone (fib_node_t *node) |
| 225 | { |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 226 | fib_entry_delegate_type_t fdt; |
| 227 | fib_entry_delegate_t *fed; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 228 | fib_entry_t *fib_entry; |
| 229 | |
| 230 | fib_entry = fib_entry_from_fib_node(node); |
| 231 | |
Neale Ranns | 2303cb1 | 2018-02-21 04:57:17 -0800 | [diff] [blame] | 232 | ASSERT(!dpo_id_is_valid(&fib_entry->fe_lb)); |
| 233 | |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 234 | FOR_EACH_DELEGATE_CHAIN(fib_entry, fdt, fed, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 235 | { |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 236 | dpo_reset(&fed->fd_dpo); |
| 237 | fib_entry_delegate_remove(fib_entry, fdt); |
| 238 | }); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 239 | |
| 240 | FIB_ENTRY_DBG(fib_entry, "last-lock"); |
| 241 | |
| 242 | fib_node_deinit(&fib_entry->fe_node); |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 243 | |
| 244 | ASSERT(0 == vec_len(fib_entry->fe_delegates)); |
| 245 | vec_free(fib_entry->fe_delegates); |
Neale Ranns | a4e7766 | 2017-12-04 20:00:30 +0000 | [diff] [blame] | 246 | vec_free(fib_entry->fe_srcs); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 247 | pool_put(fib_entry_pool, fib_entry); |
| 248 | } |
| 249 | |
Neale Ranns | a4e7766 | 2017-12-04 20:00:30 +0000 | [diff] [blame] | 250 | static fib_entry_src_t* |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 251 | fib_entry_get_best_src_i (const fib_entry_t *fib_entry) |
| 252 | { |
Neale Ranns | a4e7766 | 2017-12-04 20:00:30 +0000 | [diff] [blame] | 253 | fib_entry_src_t *bsrc; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 254 | |
| 255 | /* |
| 256 | * the enum of sources is deliberately arranged in priority order |
| 257 | */ |
Neale Ranns | a4e7766 | 2017-12-04 20:00:30 +0000 | [diff] [blame] | 258 | if (0 == vec_len(fib_entry->fe_srcs)) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 259 | { |
Neale Ranns | a4e7766 | 2017-12-04 20:00:30 +0000 | [diff] [blame] | 260 | bsrc = NULL; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 261 | } |
| 262 | else |
| 263 | { |
Neale Ranns | a4e7766 | 2017-12-04 20:00:30 +0000 | [diff] [blame] | 264 | bsrc = vec_elt_at_index(fib_entry->fe_srcs, 0); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 265 | } |
| 266 | |
| 267 | return (bsrc); |
| 268 | } |
| 269 | |
| 270 | static fib_source_t |
| 271 | fib_entry_src_get_source (const fib_entry_src_t *esrc) |
| 272 | { |
| 273 | if (NULL != esrc) |
| 274 | { |
| 275 | return (esrc->fes_src); |
| 276 | } |
Neale Ranns | 3bab8f9 | 2019-12-04 06:11:00 +0000 | [diff] [blame] | 277 | return (FIB_SOURCE_INVALID); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 278 | } |
| 279 | |
| 280 | static fib_entry_flag_t |
| 281 | fib_entry_src_get_flags (const fib_entry_src_t *esrc) |
| 282 | { |
| 283 | if (NULL != esrc) |
| 284 | { |
| 285 | return (esrc->fes_entry_flags); |
| 286 | } |
| 287 | return (FIB_ENTRY_FLAG_NONE); |
| 288 | } |
| 289 | |
| 290 | fib_entry_flag_t |
| 291 | fib_entry_get_flags (fib_node_index_t fib_entry_index) |
| 292 | { |
| 293 | return (fib_entry_get_flags_i(fib_entry_get(fib_entry_index))); |
| 294 | } |
| 295 | |
Neale Ranns | 6c3ebcc | 2016-10-02 21:20:15 +0100 | [diff] [blame] | 296 | static void |
| 297 | fib_entry_show_memory (void) |
| 298 | { |
| 299 | u32 n_srcs = 0, n_exts = 0; |
| 300 | fib_entry_src_t *esrc; |
| 301 | fib_entry_t *entry; |
| 302 | |
| 303 | fib_show_memory_usage("Entry", |
| 304 | pool_elts(fib_entry_pool), |
| 305 | pool_len(fib_entry_pool), |
| 306 | sizeof(fib_entry_t)); |
| 307 | |
Damjan Marion | b2c31b6 | 2020-12-13 21:47:40 +0100 | [diff] [blame] | 308 | pool_foreach (entry, fib_entry_pool) |
| 309 | { |
Neale Ranns | a4e7766 | 2017-12-04 20:00:30 +0000 | [diff] [blame] | 310 | n_srcs += vec_len(entry->fe_srcs); |
| 311 | vec_foreach(esrc, entry->fe_srcs) |
| 312 | { |
| 313 | n_exts += fib_path_ext_list_length(&esrc->fes_path_exts); |
| 314 | } |
Damjan Marion | b2c31b6 | 2020-12-13 21:47:40 +0100 | [diff] [blame] | 315 | } |
Neale Ranns | 6c3ebcc | 2016-10-02 21:20:15 +0100 | [diff] [blame] | 316 | |
| 317 | fib_show_memory_usage("Entry Source", |
| 318 | n_srcs, n_srcs, sizeof(fib_entry_src_t)); |
| 319 | fib_show_memory_usage("Entry Path-Extensions", |
| 320 | n_exts, n_exts, |
| 321 | sizeof(fib_path_ext_t)); |
| 322 | } |
| 323 | |
Neale Ranns | 3ee4404 | 2016-10-03 13:05:48 +0100 | [diff] [blame] | 324 | /** |
| 325 | * @brief Contribute the set of Adjacencies that this entry forwards with |
| 326 | * to build the uRPF list of its children |
| 327 | */ |
| 328 | void |
| 329 | fib_entry_contribute_urpf (fib_node_index_t entry_index, |
| 330 | index_t urpf) |
| 331 | { |
| 332 | fib_entry_t *fib_entry; |
| 333 | |
| 334 | fib_entry = fib_entry_get(entry_index); |
| 335 | |
| 336 | return (fib_path_list_contribute_urpf(fib_entry->fe_parent, urpf)); |
| 337 | } |
| 338 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 339 | /* |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 340 | * If the client is request a chain for multicast forwarding then swap |
| 341 | * the chain type to one that can provide such transport. |
| 342 | */ |
| 343 | static fib_forward_chain_type_t |
| 344 | fib_entry_chain_type_mcast_to_ucast (fib_forward_chain_type_t fct) |
| 345 | { |
| 346 | switch (fct) |
| 347 | { |
| 348 | case FIB_FORW_CHAIN_TYPE_MCAST_IP4: |
| 349 | case FIB_FORW_CHAIN_TYPE_MCAST_IP6: |
| 350 | /* |
| 351 | * we can only transport IP multicast packets if there is an |
| 352 | * LSP. |
| 353 | */ |
| 354 | fct = FIB_FORW_CHAIN_TYPE_MPLS_EOS; |
| 355 | break; |
| 356 | case FIB_FORW_CHAIN_TYPE_MPLS_EOS: |
| 357 | case FIB_FORW_CHAIN_TYPE_UNICAST_IP4: |
| 358 | case FIB_FORW_CHAIN_TYPE_UNICAST_IP6: |
| 359 | case FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS: |
| 360 | case FIB_FORW_CHAIN_TYPE_ETHERNET: |
| 361 | case FIB_FORW_CHAIN_TYPE_NSH: |
Neale Ranns | d792d9c | 2017-10-21 10:53:20 -0700 | [diff] [blame] | 362 | case FIB_FORW_CHAIN_TYPE_BIER: |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 363 | break; |
| 364 | } |
| 365 | |
| 366 | return (fct); |
| 367 | } |
| 368 | |
| 369 | /* |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 370 | * fib_entry_contribute_forwarding |
| 371 | * |
| 372 | * Get an lock the forwarding information (DPO) contributed by the FIB entry. |
| 373 | */ |
| 374 | void |
| 375 | fib_entry_contribute_forwarding (fib_node_index_t fib_entry_index, |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 376 | fib_forward_chain_type_t fct, |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 377 | dpo_id_t *dpo) |
| 378 | { |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 379 | fib_entry_delegate_t *fed; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 380 | fib_entry_t *fib_entry; |
| 381 | |
| 382 | fib_entry = fib_entry_get(fib_entry_index); |
| 383 | |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 384 | /* |
| 385 | * mfib children ask for mcast chains. fix these to the appropriate ucast types. |
| 386 | */ |
| 387 | fct = fib_entry_chain_type_mcast_to_ucast(fct); |
| 388 | |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 389 | if (fct == fib_entry_get_default_chain_type(fib_entry)) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 390 | { |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 391 | dpo_copy(dpo, &fib_entry->fe_lb); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 392 | } |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 393 | else |
| 394 | { |
Neale Ranns | 1f50bf8 | 2019-07-16 15:28:52 +0000 | [diff] [blame] | 395 | fed = fib_entry_delegate_find(fib_entry, |
| 396 | fib_entry_chain_type_to_delegate_type(fct)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 397 | |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 398 | if (NULL == fed) |
| 399 | { |
Neale Ranns | a66020b | 2019-10-14 08:52:43 -0700 | [diff] [blame] | 400 | /* |
| 401 | * use a temporary DPO lest the delegate realloc in the recursive |
| 402 | * calculation. |
| 403 | */ |
| 404 | dpo_id_t tmp = DPO_INVALID; |
| 405 | |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 406 | /* |
| 407 | * on-demand create eos/non-eos. |
| 408 | * There is no on-demand delete because: |
| 409 | * - memory versus complexity & reliability: |
| 410 | * leaving unrequired [n]eos LB arounds wastes memory, cleaning |
| 411 | * then up on the right trigger is more code. i favour the latter. |
| 412 | */ |
| 413 | fib_entry_src_mk_lb(fib_entry, |
Neale Ranns | 1c59df7 | 2021-01-26 12:08:25 +0000 | [diff] [blame] | 414 | fib_entry_get_best_source(fib_entry_index), |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 415 | fct, |
Neale Ranns | a66020b | 2019-10-14 08:52:43 -0700 | [diff] [blame] | 416 | &tmp); |
| 417 | |
| 418 | fed = fib_entry_delegate_find_or_add( |
| 419 | fib_entry, |
| 420 | fib_entry_chain_type_to_delegate_type(fct)); |
| 421 | |
| 422 | dpo_copy(&fed->fd_dpo, &tmp); |
| 423 | dpo_reset(&tmp); |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 424 | } |
| 425 | |
| 426 | dpo_copy(dpo, &fed->fd_dpo); |
| 427 | } |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 428 | /* |
Neale Ranns | 2303cb1 | 2018-02-21 04:57:17 -0800 | [diff] [blame] | 429 | * use the drop DPO is nothing else is present |
| 430 | */ |
| 431 | if (!dpo_id_is_valid(dpo)) |
| 432 | { |
| 433 | dpo_copy(dpo, drop_dpo_get(fib_forw_chain_type_to_dpo_proto(fct))); |
| 434 | } |
| 435 | |
| 436 | /* |
Neale Ranns | 0f26c5a | 2017-03-01 15:12:11 -0800 | [diff] [blame] | 437 | * don't allow the special index indicating replicate.vs.load-balance |
| 438 | * to escape to the clients |
| 439 | */ |
| 440 | dpo->dpoi_index &= ~MPLS_IS_REPLICATE; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 441 | } |
| 442 | |
| 443 | const dpo_id_t * |
| 444 | fib_entry_contribute_ip_forwarding (fib_node_index_t fib_entry_index) |
| 445 | { |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 446 | fib_forward_chain_type_t fct; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 447 | fib_entry_t *fib_entry; |
| 448 | |
| 449 | fib_entry = fib_entry_get(fib_entry_index); |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 450 | fct = fib_entry_get_default_chain_type(fib_entry); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 451 | |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 452 | ASSERT((fct == FIB_FORW_CHAIN_TYPE_UNICAST_IP4 || |
| 453 | fct == FIB_FORW_CHAIN_TYPE_UNICAST_IP6)); |
| 454 | |
Neale Ranns | 2303cb1 | 2018-02-21 04:57:17 -0800 | [diff] [blame] | 455 | if (dpo_id_is_valid(&fib_entry->fe_lb)) |
| 456 | { |
| 457 | return (&fib_entry->fe_lb); |
| 458 | } |
| 459 | |
| 460 | return (drop_dpo_get(fib_forw_chain_type_to_dpo_proto(fct))); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 461 | } |
| 462 | |
| 463 | adj_index_t |
| 464 | fib_entry_get_adj (fib_node_index_t fib_entry_index) |
| 465 | { |
| 466 | const dpo_id_t *dpo; |
| 467 | |
| 468 | dpo = fib_entry_contribute_ip_forwarding(fib_entry_index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 469 | |
Neale Ranns | ca19361 | 2017-06-14 06:50:08 -0700 | [diff] [blame] | 470 | if (dpo_id_is_valid(dpo)) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 471 | { |
Neale Ranns | ca19361 | 2017-06-14 06:50:08 -0700 | [diff] [blame] | 472 | dpo = load_balance_get_bucket(dpo->dpoi_index, 0); |
| 473 | |
| 474 | if (dpo_is_adj(dpo)) |
| 475 | { |
| 476 | return (dpo->dpoi_index); |
| 477 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 478 | } |
| 479 | return (ADJ_INDEX_INVALID); |
| 480 | } |
| 481 | |
| 482 | fib_node_index_t |
| 483 | fib_entry_get_path_list (fib_node_index_t fib_entry_index) |
| 484 | { |
| 485 | fib_entry_t *fib_entry; |
| 486 | |
| 487 | fib_entry = fib_entry_get(fib_entry_index); |
| 488 | |
| 489 | return (fib_entry->fe_parent); |
| 490 | } |
| 491 | |
| 492 | u32 |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 493 | fib_entry_child_add (fib_node_index_t fib_entry_index, |
| 494 | fib_node_type_t child_type, |
| 495 | fib_node_index_t child_index) |
| 496 | { |
| 497 | return (fib_node_child_add(FIB_NODE_TYPE_ENTRY, |
| 498 | fib_entry_index, |
| 499 | child_type, |
| 500 | child_index)); |
| 501 | }; |
| 502 | |
| 503 | void |
| 504 | fib_entry_child_remove (fib_node_index_t fib_entry_index, |
| 505 | u32 sibling_index) |
| 506 | { |
| 507 | fib_node_child_remove(FIB_NODE_TYPE_ENTRY, |
| 508 | fib_entry_index, |
| 509 | sibling_index); |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 510 | |
| 511 | if (0 == fib_node_get_n_children(FIB_NODE_TYPE_ENTRY, |
| 512 | fib_entry_index)) |
| 513 | { |
| 514 | /* |
| 515 | * if there are no children left then there is no reason to keep |
| 516 | * the non-default forwarding chains. those chains are built only |
| 517 | * because the children want them. |
| 518 | */ |
| 519 | fib_entry_delegate_type_t fdt; |
| 520 | fib_entry_delegate_t *fed; |
| 521 | fib_entry_t *fib_entry; |
| 522 | |
| 523 | fib_entry = fib_entry_get(fib_entry_index); |
| 524 | |
| 525 | FOR_EACH_DELEGATE_CHAIN(fib_entry, fdt, fed, |
| 526 | { |
| 527 | dpo_reset(&fed->fd_dpo); |
| 528 | fib_entry_delegate_remove(fib_entry, fdt); |
| 529 | }); |
| 530 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 531 | } |
| 532 | |
| 533 | static fib_entry_t * |
| 534 | fib_entry_alloc (u32 fib_index, |
| 535 | const fib_prefix_t *prefix, |
| 536 | fib_node_index_t *fib_entry_index) |
| 537 | { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 538 | fib_entry_t *fib_entry; |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 539 | fib_prefix_t *fep; |
Damjan Marion | 66d4cb5 | 2022-03-17 18:59:46 +0100 | [diff] [blame^] | 540 | u8 need_barrier_sync = pool_get_will_expand (fib_entry_pool); |
Stanislav Zaikin | 754cffb | 2021-09-28 18:31:32 +0200 | [diff] [blame] | 541 | vlib_main_t *vm = vlib_get_main(); |
| 542 | ASSERT (vm->thread_index == 0); |
| 543 | |
Stanislav Zaikin | 754cffb | 2021-09-28 18:31:32 +0200 | [diff] [blame] | 544 | if (need_barrier_sync) |
| 545 | vlib_worker_thread_barrier_sync (vm); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 546 | |
| 547 | pool_get(fib_entry_pool, fib_entry); |
Stanislav Zaikin | 754cffb | 2021-09-28 18:31:32 +0200 | [diff] [blame] | 548 | |
| 549 | if (need_barrier_sync) |
| 550 | vlib_worker_thread_barrier_release (vm); |
| 551 | |
Dave Barach | b7b9299 | 2018-10-17 10:38:51 -0400 | [diff] [blame] | 552 | clib_memset(fib_entry, 0, sizeof(*fib_entry)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 553 | |
| 554 | fib_node_init(&fib_entry->fe_node, |
| 555 | FIB_NODE_TYPE_ENTRY); |
| 556 | |
| 557 | fib_entry->fe_fib_index = fib_index; |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 558 | |
| 559 | /* |
| 560 | * the one time we need to update the const prefix is when |
| 561 | * the entry is first created |
| 562 | */ |
| 563 | fep = (fib_prefix_t*)&(fib_entry->fe_prefix); |
| 564 | *fep = *prefix; |
| 565 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 566 | if (FIB_PROTOCOL_MPLS == fib_entry->fe_prefix.fp_proto) |
| 567 | { |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 568 | fep->fp_len = 21; |
| 569 | if (MPLS_NON_EOS == fep->fp_eos) |
| 570 | { |
| 571 | fep->fp_payload_proto = DPO_PROTO_MPLS; |
| 572 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 573 | ASSERT(DPO_PROTO_NONE != fib_entry->fe_prefix.fp_payload_proto); |
| 574 | } |
| 575 | |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 576 | dpo_reset(&fib_entry->fe_lb); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 577 | |
| 578 | *fib_entry_index = fib_entry_get_index(fib_entry); |
| 579 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 580 | return (fib_entry); |
| 581 | } |
| 582 | |
Neale Ranns | 08a70f1 | 2017-02-24 06:16:01 -0800 | [diff] [blame] | 583 | static fib_entry_t* |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 584 | fib_entry_post_flag_update_actions (fib_entry_t *fib_entry, |
Neale Ranns | 50bd1d3 | 2021-10-08 07:16:12 +0000 | [diff] [blame] | 585 | fib_entry_flag_t old_flags, |
| 586 | u32 new_fib_index) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 587 | { |
Neale Ranns | 08a70f1 | 2017-02-24 06:16:01 -0800 | [diff] [blame] | 588 | fib_node_index_t fei; |
| 589 | |
| 590 | /* |
| 591 | * save the index so we can recover from pool reallocs |
| 592 | */ |
| 593 | fei = fib_entry_get_index(fib_entry); |
| 594 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 595 | /* |
| 596 | * handle changes to attached export for import entries |
| 597 | */ |
| 598 | int is_import = (FIB_ENTRY_FLAG_IMPORT & fib_entry_get_flags_i(fib_entry)); |
| 599 | int was_import = (FIB_ENTRY_FLAG_IMPORT & old_flags); |
| 600 | |
| 601 | if (!was_import && is_import) |
| 602 | { |
| 603 | /* |
| 604 | * transition from not exported to exported |
| 605 | */ |
| 606 | |
| 607 | /* |
| 608 | * there is an assumption here that the entry resolves via only |
| 609 | * one interface and that it is the cross VRF interface. |
| 610 | */ |
Neale Ranns | 50bd1d3 | 2021-10-08 07:16:12 +0000 | [diff] [blame] | 611 | if (~0 == new_fib_index) |
| 612 | { |
| 613 | u32 sw_if_index = fib_path_list_get_resolving_interface(fib_entry->fe_parent); |
| 614 | new_fib_index = fib_table_get_index_for_sw_if_index( |
| 615 | fib_entry_get_proto(fib_entry), |
| 616 | sw_if_index); |
| 617 | } |
| 618 | fib_attached_export_import(fib_entry, new_fib_index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 619 | } |
| 620 | else if (was_import && !is_import) |
| 621 | { |
| 622 | /* |
| 623 | * transition from exported to not exported |
| 624 | */ |
| 625 | fib_attached_export_purge(fib_entry); |
| 626 | } |
Neale Ranns | 50bd1d3 | 2021-10-08 07:16:12 +0000 | [diff] [blame] | 627 | else if (was_import && is_import && ~0 != new_fib_index) |
| 628 | { |
| 629 | /* |
| 630 | * transition from export from one table to another |
| 631 | */ |
| 632 | fib_attached_export_purge(fib_entry); |
| 633 | fib_attached_export_import(fib_entry, new_fib_index); |
| 634 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 635 | /* |
| 636 | * else |
| 637 | * no change. nothing to do. |
| 638 | */ |
| 639 | |
| 640 | /* |
Neale Ranns | 08a70f1 | 2017-02-24 06:16:01 -0800 | [diff] [blame] | 641 | * reload the entry address post possible pool realloc |
| 642 | */ |
| 643 | fib_entry = fib_entry_get(fei); |
| 644 | |
| 645 | /* |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 646 | * handle changes to attached export for export entries |
| 647 | */ |
| 648 | int is_attached = (FIB_ENTRY_FLAG_ATTACHED & fib_entry_get_flags_i(fib_entry)); |
| 649 | int was_attached = (FIB_ENTRY_FLAG_ATTACHED & old_flags); |
| 650 | |
| 651 | if (!was_attached && is_attached) |
| 652 | { |
| 653 | /* |
| 654 | * transition to attached. time to export |
| 655 | */ |
| 656 | // FIXME |
| 657 | } |
| 658 | // else FIXME |
Neale Ranns | 08a70f1 | 2017-02-24 06:16:01 -0800 | [diff] [blame] | 659 | |
| 660 | return (fib_entry); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 661 | } |
| 662 | |
Neale Ranns | 981a690 | 2019-11-21 09:37:41 +0000 | [diff] [blame] | 663 | static fib_entry_t* |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 664 | fib_entry_post_install_actions (fib_entry_t *fib_entry, |
| 665 | fib_source_t source, |
| 666 | fib_entry_flag_t old_flags) |
| 667 | { |
Neale Ranns | 50bd1d3 | 2021-10-08 07:16:12 +0000 | [diff] [blame] | 668 | fib_entry = fib_entry_post_flag_update_actions(fib_entry, old_flags, ~0); |
Neale Ranns | 6ede570 | 2020-02-13 09:12:36 +0000 | [diff] [blame] | 669 | fib_entry = fib_entry_src_action_installed(fib_entry, source); |
Neale Ranns | 981a690 | 2019-11-21 09:37:41 +0000 | [diff] [blame] | 670 | |
| 671 | return (fib_entry); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 672 | } |
| 673 | |
| 674 | fib_node_index_t |
| 675 | fib_entry_create (u32 fib_index, |
| 676 | const fib_prefix_t *prefix, |
| 677 | fib_source_t source, |
| 678 | fib_entry_flag_t flags, |
| 679 | const fib_route_path_t *paths) |
| 680 | { |
| 681 | fib_node_index_t fib_entry_index; |
| 682 | fib_entry_t *fib_entry; |
| 683 | |
| 684 | ASSERT(0 < vec_len(paths)); |
| 685 | |
| 686 | fib_entry = fib_entry_alloc(fib_index, prefix, &fib_entry_index); |
| 687 | |
| 688 | /* |
| 689 | * since this is a new entry create, we don't need to check for winning |
| 690 | * sources - there is only one. |
| 691 | */ |
| 692 | fib_entry = fib_entry_src_action_add(fib_entry, source, flags, |
| 693 | drop_dpo_get( |
| 694 | fib_proto_to_dpo( |
| 695 | fib_entry_get_proto(fib_entry)))); |
| 696 | fib_entry_src_action_path_swap(fib_entry, |
| 697 | source, |
| 698 | flags, |
| 699 | paths); |
| 700 | /* |
| 701 | * handle possible realloc's by refetching the pointer |
| 702 | */ |
| 703 | fib_entry = fib_entry_get(fib_entry_index); |
| 704 | fib_entry_src_action_activate(fib_entry, source); |
| 705 | |
Neale Ranns | 981a690 | 2019-11-21 09:37:41 +0000 | [diff] [blame] | 706 | fib_entry = fib_entry_post_install_actions(fib_entry, source, |
| 707 | FIB_ENTRY_FLAG_NONE); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 708 | |
Neale Ranns | 710071b | 2018-09-24 12:36:26 +0000 | [diff] [blame] | 709 | FIB_ENTRY_DBG(fib_entry, "create"); |
| 710 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 711 | return (fib_entry_index); |
| 712 | } |
| 713 | |
| 714 | fib_node_index_t |
| 715 | fib_entry_create_special (u32 fib_index, |
| 716 | const fib_prefix_t *prefix, |
| 717 | fib_source_t source, |
| 718 | fib_entry_flag_t flags, |
| 719 | const dpo_id_t *dpo) |
| 720 | { |
| 721 | fib_node_index_t fib_entry_index; |
| 722 | fib_entry_t *fib_entry; |
| 723 | |
| 724 | /* |
Paul Vinciguerra | 8feeaff | 2019-03-27 11:25:48 -0700 | [diff] [blame] | 725 | * create and initialize the new enty |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 726 | */ |
| 727 | fib_entry = fib_entry_alloc(fib_index, prefix, &fib_entry_index); |
| 728 | |
| 729 | /* |
| 730 | * create the path-list |
| 731 | */ |
| 732 | fib_entry = fib_entry_src_action_add(fib_entry, source, flags, dpo); |
| 733 | fib_entry_src_action_activate(fib_entry, source); |
| 734 | |
Neale Ranns | 981a690 | 2019-11-21 09:37:41 +0000 | [diff] [blame] | 735 | fib_entry = fib_entry_post_install_actions(fib_entry, source, |
| 736 | FIB_ENTRY_FLAG_NONE); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 737 | |
Neale Ranns | 710071b | 2018-09-24 12:36:26 +0000 | [diff] [blame] | 738 | FIB_ENTRY_DBG(fib_entry, "create-special"); |
| 739 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 740 | return (fib_entry_index); |
| 741 | } |
| 742 | |
| 743 | static void |
| 744 | fib_entry_post_update_actions (fib_entry_t *fib_entry, |
| 745 | fib_source_t source, |
| 746 | fib_entry_flag_t old_flags) |
| 747 | { |
| 748 | /* |
| 749 | * backwalk to children to inform then of the change to forwarding. |
| 750 | */ |
| 751 | fib_node_back_walk_ctx_t bw_ctx = { |
| 752 | .fnbw_reason = FIB_NODE_BW_REASON_FLAG_EVALUATE, |
| 753 | }; |
| 754 | |
| 755 | fib_walk_sync(FIB_NODE_TYPE_ENTRY, fib_entry_get_index(fib_entry), &bw_ctx); |
| 756 | |
| 757 | /* |
| 758 | * then inform any covered prefixes |
| 759 | */ |
| 760 | fib_entry_cover_update_notify(fib_entry); |
| 761 | |
| 762 | fib_entry_post_install_actions(fib_entry, source, old_flags); |
| 763 | } |
| 764 | |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 765 | void |
Neale Ranns | 2303cb1 | 2018-02-21 04:57:17 -0800 | [diff] [blame] | 766 | fib_entry_recalculate_forwarding (fib_node_index_t fib_entry_index) |
Neale Ranns | 948e00f | 2016-10-20 13:39:34 +0100 | [diff] [blame] | 767 | { |
Neale Ranns | 2303cb1 | 2018-02-21 04:57:17 -0800 | [diff] [blame] | 768 | fib_source_t best_source; |
| 769 | fib_entry_t *fib_entry; |
| 770 | fib_entry_src_t *bsrc; |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 771 | |
Neale Ranns | 2303cb1 | 2018-02-21 04:57:17 -0800 | [diff] [blame] | 772 | fib_entry = fib_entry_get(fib_entry_index); |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 773 | |
Neale Ranns | 2303cb1 | 2018-02-21 04:57:17 -0800 | [diff] [blame] | 774 | bsrc = fib_entry_get_best_src_i(fib_entry); |
| 775 | best_source = fib_entry_src_get_source(bsrc); |
| 776 | |
| 777 | fib_entry_src_action_reactivate(fib_entry, best_source); |
| 778 | } |
| 779 | |
| 780 | static void |
| 781 | fib_entry_source_change_w_flags (fib_entry_t *fib_entry, |
| 782 | fib_source_t old_source, |
| 783 | fib_entry_flag_t old_flags, |
| 784 | fib_source_t new_source) |
| 785 | { |
Neale Ranns | 3bab8f9 | 2019-12-04 06:11:00 +0000 | [diff] [blame] | 786 | switch (fib_source_cmp(new_source, old_source)) |
Neale Ranns | 948e00f | 2016-10-20 13:39:34 +0100 | [diff] [blame] | 787 | { |
Neale Ranns | 3bab8f9 | 2019-12-04 06:11:00 +0000 | [diff] [blame] | 788 | case FIB_SOURCE_CMP_BETTER: |
Neale Ranns | 948e00f | 2016-10-20 13:39:34 +0100 | [diff] [blame] | 789 | /* |
| 790 | * we have a new winning source. |
| 791 | */ |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 792 | fib_entry_src_action_deactivate(fib_entry, old_source); |
Neale Ranns | 948e00f | 2016-10-20 13:39:34 +0100 | [diff] [blame] | 793 | fib_entry_src_action_activate(fib_entry, new_source); |
Neale Ranns | 3bab8f9 | 2019-12-04 06:11:00 +0000 | [diff] [blame] | 794 | break; |
| 795 | |
| 796 | case FIB_SOURCE_CMP_WORSE: |
Neale Ranns | 2303cb1 | 2018-02-21 04:57:17 -0800 | [diff] [blame] | 797 | /* |
| 798 | * the new source loses. Re-activate the winning sources |
| 799 | * in case it is an interposer and hence relied on the losing |
| 800 | * source's path-list. |
| 801 | */ |
| 802 | fib_entry_src_action_reactivate(fib_entry, old_source); |
| 803 | return; |
Neale Ranns | 3bab8f9 | 2019-12-04 06:11:00 +0000 | [diff] [blame] | 804 | |
| 805 | case FIB_SOURCE_CMP_EQUAL: |
Neale Ranns | 948e00f | 2016-10-20 13:39:34 +0100 | [diff] [blame] | 806 | /* |
| 807 | * the new source is one this entry already has. |
| 808 | * But the path-list was updated, which will contribute new forwarding, |
| 809 | * so install it. |
| 810 | */ |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 811 | fib_entry_src_action_reactivate(fib_entry, new_source); |
Neale Ranns | 3bab8f9 | 2019-12-04 06:11:00 +0000 | [diff] [blame] | 812 | break; |
Neale Ranns | 948e00f | 2016-10-20 13:39:34 +0100 | [diff] [blame] | 813 | } |
| 814 | |
| 815 | fib_entry_post_update_actions(fib_entry, new_source, old_flags); |
| 816 | } |
| 817 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 818 | void |
Neale Ranns | 2303cb1 | 2018-02-21 04:57:17 -0800 | [diff] [blame] | 819 | fib_entry_source_change (fib_entry_t *fib_entry, |
| 820 | fib_source_t old_source, |
| 821 | fib_source_t new_source) |
| 822 | { |
| 823 | fib_entry_flag_t old_flags; |
| 824 | |
| 825 | old_flags = fib_entry_get_flags_for_source( |
| 826 | fib_entry_get_index(fib_entry), old_source); |
| 827 | |
| 828 | return (fib_entry_source_change_w_flags(fib_entry, old_source, |
| 829 | old_flags, new_source)); |
| 830 | } |
| 831 | |
| 832 | void |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 833 | fib_entry_special_add (fib_node_index_t fib_entry_index, |
| 834 | fib_source_t source, |
| 835 | fib_entry_flag_t flags, |
| 836 | const dpo_id_t *dpo) |
| 837 | { |
| 838 | fib_source_t best_source; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 839 | fib_entry_t *fib_entry; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 840 | |
| 841 | fib_entry = fib_entry_get(fib_entry_index); |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 842 | best_source = fib_entry_get_best_source(fib_entry_index); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 843 | |
| 844 | fib_entry = fib_entry_src_action_add(fib_entry, source, flags, dpo); |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 845 | fib_entry_source_change(fib_entry, best_source, source); |
Neale Ranns | 710071b | 2018-09-24 12:36:26 +0000 | [diff] [blame] | 846 | FIB_ENTRY_DBG(fib_entry, "special-add:%U", format_fib_source, source); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 847 | } |
| 848 | |
| 849 | void |
Neale Ranns | 948e00f | 2016-10-20 13:39:34 +0100 | [diff] [blame] | 850 | fib_entry_special_update (fib_node_index_t fib_entry_index, |
| 851 | fib_source_t source, |
| 852 | fib_entry_flag_t flags, |
| 853 | const dpo_id_t *dpo) |
| 854 | { |
| 855 | fib_source_t best_source; |
Neale Ranns | 948e00f | 2016-10-20 13:39:34 +0100 | [diff] [blame] | 856 | fib_entry_t *fib_entry; |
Neale Ranns | 948e00f | 2016-10-20 13:39:34 +0100 | [diff] [blame] | 857 | |
| 858 | fib_entry = fib_entry_get(fib_entry_index); |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 859 | best_source = fib_entry_get_best_source(fib_entry_index); |
Neale Ranns | 948e00f | 2016-10-20 13:39:34 +0100 | [diff] [blame] | 860 | |
| 861 | fib_entry = fib_entry_src_action_update(fib_entry, source, flags, dpo); |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 862 | fib_entry_source_change(fib_entry, best_source, source); |
Neale Ranns | 710071b | 2018-09-24 12:36:26 +0000 | [diff] [blame] | 863 | |
| 864 | FIB_ENTRY_DBG(fib_entry, "special-updated:%U", format_fib_source, source); |
Neale Ranns | 948e00f | 2016-10-20 13:39:34 +0100 | [diff] [blame] | 865 | } |
| 866 | |
| 867 | |
| 868 | void |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 869 | fib_entry_path_add (fib_node_index_t fib_entry_index, |
| 870 | fib_source_t source, |
| 871 | fib_entry_flag_t flags, |
Neale Ranns | 097fa66 | 2018-05-01 05:17:55 -0700 | [diff] [blame] | 872 | const fib_route_path_t *rpaths) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 873 | { |
| 874 | fib_source_t best_source; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 875 | fib_entry_t *fib_entry; |
Neale Ranns | a4e7766 | 2017-12-04 20:00:30 +0000 | [diff] [blame] | 876 | fib_entry_src_t *bsrc; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 877 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 878 | fib_entry = fib_entry_get(fib_entry_index); |
| 879 | ASSERT(NULL != fib_entry); |
| 880 | |
| 881 | bsrc = fib_entry_get_best_src_i(fib_entry); |
| 882 | best_source = fib_entry_src_get_source(bsrc); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 883 | |
Neale Ranns | 097fa66 | 2018-05-01 05:17:55 -0700 | [diff] [blame] | 884 | fib_entry = fib_entry_src_action_path_add(fib_entry, source, flags, rpaths); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 885 | |
Neale Ranns | 2303cb1 | 2018-02-21 04:57:17 -0800 | [diff] [blame] | 886 | fib_entry_source_change(fib_entry, best_source, source); |
Neale Ranns | 710071b | 2018-09-24 12:36:26 +0000 | [diff] [blame] | 887 | |
| 888 | FIB_ENTRY_DBG(fib_entry, "path add:%U", format_fib_source, source); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 889 | } |
| 890 | |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 891 | static fib_entry_src_flag_t |
| 892 | fib_entry_src_burn_only_inherited (fib_entry_t *fib_entry) |
| 893 | { |
| 894 | fib_entry_src_t *src; |
| 895 | fib_source_t source; |
| 896 | int has_only_inherited_sources = 1; |
| 897 | |
| 898 | FOR_EACH_SRC_ADDED(fib_entry, src, source, |
| 899 | ({ |
| 900 | if (!(src->fes_flags & FIB_ENTRY_SRC_FLAG_INHERITED)) |
| 901 | { |
| 902 | has_only_inherited_sources = 0; |
| 903 | break; |
| 904 | } |
| 905 | })); |
| 906 | if (has_only_inherited_sources) |
| 907 | { |
| 908 | FOR_EACH_SRC_ADDED(fib_entry, src, source, |
| 909 | ({ |
| 910 | fib_entry_src_action_remove(fib_entry, source); |
| 911 | })); |
| 912 | return (FIB_ENTRY_SRC_FLAG_NONE); |
| 913 | } |
| 914 | else |
| 915 | { |
| 916 | return (FIB_ENTRY_SRC_FLAG_ADDED); |
| 917 | } |
| 918 | } |
| 919 | |
| 920 | static fib_entry_src_flag_t |
| 921 | fib_entry_source_removed (fib_entry_t *fib_entry, |
| 922 | fib_entry_flag_t old_flags) |
| 923 | { |
| 924 | const fib_entry_src_t *bsrc; |
| 925 | fib_source_t best_source; |
| 926 | |
| 927 | /* |
| 928 | * if all that is left are inherited sources, then burn them |
| 929 | */ |
| 930 | fib_entry_src_burn_only_inherited(fib_entry); |
| 931 | |
| 932 | bsrc = fib_entry_get_best_src_i(fib_entry); |
| 933 | best_source = fib_entry_src_get_source(bsrc); |
| 934 | |
Neale Ranns | 3bab8f9 | 2019-12-04 06:11:00 +0000 | [diff] [blame] | 935 | if (FIB_SOURCE_INVALID == best_source) |
Neale Ranns | 2303cb1 | 2018-02-21 04:57:17 -0800 | [diff] [blame] | 936 | { |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 937 | /* |
| 938 | * no more sources left. this entry is toast. |
| 939 | */ |
Neale Ranns | 50bd1d3 | 2021-10-08 07:16:12 +0000 | [diff] [blame] | 940 | fib_entry = fib_entry_post_flag_update_actions(fib_entry, old_flags, ~0); |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 941 | fib_entry_src_action_uninstall(fib_entry); |
| 942 | |
| 943 | return (FIB_ENTRY_SRC_FLAG_NONE); |
| 944 | } |
| 945 | else |
| 946 | { |
| 947 | fib_entry_src_action_activate(fib_entry, best_source); |
| 948 | } |
| 949 | |
| 950 | fib_entry_post_update_actions(fib_entry, best_source, old_flags); |
| 951 | |
| 952 | /* |
| 953 | * still have sources |
| 954 | */ |
| 955 | return (FIB_ENTRY_SRC_FLAG_ADDED); |
| 956 | } |
| 957 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 958 | /* |
| 959 | * fib_entry_path_remove |
| 960 | * |
| 961 | * remove a path from the entry. |
| 962 | * return the fib_entry's index if it is still present, INVALID otherwise. |
| 963 | */ |
| 964 | fib_entry_src_flag_t |
| 965 | fib_entry_path_remove (fib_node_index_t fib_entry_index, |
| 966 | fib_source_t source, |
Neale Ranns | 097fa66 | 2018-05-01 05:17:55 -0700 | [diff] [blame] | 967 | const fib_route_path_t *rpaths) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 968 | { |
| 969 | fib_entry_src_flag_t sflag; |
| 970 | fib_source_t best_source; |
| 971 | fib_entry_flag_t bflags; |
| 972 | fib_entry_t *fib_entry; |
Neale Ranns | a4e7766 | 2017-12-04 20:00:30 +0000 | [diff] [blame] | 973 | fib_entry_src_t *bsrc; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 974 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 975 | fib_entry = fib_entry_get(fib_entry_index); |
| 976 | ASSERT(NULL != fib_entry); |
| 977 | |
| 978 | bsrc = fib_entry_get_best_src_i(fib_entry); |
| 979 | best_source = fib_entry_src_get_source(bsrc); |
| 980 | bflags = fib_entry_src_get_flags(bsrc); |
| 981 | |
Neale Ranns | 097fa66 | 2018-05-01 05:17:55 -0700 | [diff] [blame] | 982 | sflag = fib_entry_src_action_path_remove(fib_entry, source, rpaths); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 983 | |
Neale Ranns | 710071b | 2018-09-24 12:36:26 +0000 | [diff] [blame] | 984 | FIB_ENTRY_DBG(fib_entry, "path remove:%U", format_fib_source, source); |
| 985 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 986 | /* |
| 987 | * if the path list for the source passed is invalid, |
| 988 | * then we need to create a new one. else we are updating |
| 989 | * an existing. |
| 990 | */ |
Neale Ranns | 3bab8f9 | 2019-12-04 06:11:00 +0000 | [diff] [blame] | 991 | switch (fib_source_cmp(source, best_source)) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 992 | { |
Neale Ranns | 3bab8f9 | 2019-12-04 06:11:00 +0000 | [diff] [blame] | 993 | case FIB_SOURCE_CMP_BETTER: |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 994 | /* |
| 995 | * Que! removing a path from a source that is better than the |
| 996 | * one this entry is using. |
| 997 | */ |
| 998 | ASSERT(0); |
Neale Ranns | 3bab8f9 | 2019-12-04 06:11:00 +0000 | [diff] [blame] | 999 | break; |
| 1000 | case FIB_SOURCE_CMP_WORSE: |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1001 | /* |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 1002 | * the source is not the best. no need to update forwarding |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1003 | */ |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 1004 | if (FIB_ENTRY_SRC_FLAG_ADDED & sflag) |
| 1005 | { |
| 1006 | /* |
| 1007 | * the source being removed still has paths |
| 1008 | */ |
| 1009 | return (FIB_ENTRY_SRC_FLAG_ADDED); |
| 1010 | } |
| 1011 | else |
| 1012 | { |
| 1013 | /* |
| 1014 | * that was the last path from this source, check if those |
| 1015 | * that remain are non-inherited |
| 1016 | */ |
| 1017 | return (fib_entry_src_burn_only_inherited(fib_entry)); |
Neale Ranns | 3bab8f9 | 2019-12-04 06:11:00 +0000 | [diff] [blame] | 1018 | } |
| 1019 | break; |
| 1020 | case FIB_SOURCE_CMP_EQUAL: |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1021 | /* |
| 1022 | * removing a path from the path-list we were using. |
| 1023 | */ |
| 1024 | if (!(FIB_ENTRY_SRC_FLAG_ADDED & sflag)) |
| 1025 | { |
| 1026 | /* |
| 1027 | * the last path from the source was removed. |
| 1028 | * fallback to lower source |
| 1029 | */ |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 1030 | return (fib_entry_source_removed(fib_entry, bflags)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1031 | } |
| 1032 | else |
| 1033 | { |
| 1034 | /* |
| 1035 | * re-install the new forwarding information |
| 1036 | */ |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 1037 | fib_entry_src_action_reactivate(fib_entry, source); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1038 | } |
Neale Ranns | 3bab8f9 | 2019-12-04 06:11:00 +0000 | [diff] [blame] | 1039 | break; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1040 | } |
| 1041 | |
| 1042 | fib_entry_post_update_actions(fib_entry, source, bflags); |
| 1043 | |
| 1044 | /* |
| 1045 | * still have sources |
| 1046 | */ |
| 1047 | return (FIB_ENTRY_SRC_FLAG_ADDED); |
| 1048 | } |
| 1049 | |
| 1050 | /* |
| 1051 | * fib_entry_special_remove |
| 1052 | * |
| 1053 | * remove a special source from the entry. |
| 1054 | * return the fib_entry's index if it is still present, INVALID otherwise. |
| 1055 | */ |
| 1056 | fib_entry_src_flag_t |
| 1057 | fib_entry_special_remove (fib_node_index_t fib_entry_index, |
| 1058 | fib_source_t source) |
| 1059 | { |
| 1060 | fib_entry_src_flag_t sflag; |
| 1061 | fib_source_t best_source; |
| 1062 | fib_entry_flag_t bflags; |
| 1063 | fib_entry_t *fib_entry; |
Neale Ranns | a4e7766 | 2017-12-04 20:00:30 +0000 | [diff] [blame] | 1064 | fib_entry_src_t *bsrc; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1065 | |
| 1066 | fib_entry = fib_entry_get(fib_entry_index); |
| 1067 | ASSERT(NULL != fib_entry); |
| 1068 | |
| 1069 | bsrc = fib_entry_get_best_src_i(fib_entry); |
| 1070 | best_source = fib_entry_src_get_source(bsrc); |
| 1071 | bflags = fib_entry_src_get_flags(bsrc); |
| 1072 | |
Neale Ranns | 710071b | 2018-09-24 12:36:26 +0000 | [diff] [blame] | 1073 | FIB_ENTRY_DBG(fib_entry, "special remove:%U", format_fib_source, source); |
| 1074 | |
Neale Ranns | 8164a03 | 2019-03-26 07:25:11 -0700 | [diff] [blame] | 1075 | sflag = fib_entry_src_action_remove_or_update_inherit(fib_entry, source); |
| 1076 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1077 | /* |
| 1078 | * if the path list for the source passed is invalid, |
| 1079 | * then we need to create a new one. else we are updating |
| 1080 | * an existing. |
| 1081 | */ |
Neale Ranns | 3bab8f9 | 2019-12-04 06:11:00 +0000 | [diff] [blame] | 1082 | switch (fib_source_cmp(source, best_source)) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1083 | { |
Neale Ranns | 3bab8f9 | 2019-12-04 06:11:00 +0000 | [diff] [blame] | 1084 | case FIB_SOURCE_CMP_BETTER: |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1085 | /* |
| 1086 | * Que! removing a path from a source that is better than the |
| 1087 | * one this entry is using. This can only mean it is a source |
| 1088 | * this prefix does not have. |
| 1089 | */ |
| 1090 | return (FIB_ENTRY_SRC_FLAG_ADDED); |
Neale Ranns | 3bab8f9 | 2019-12-04 06:11:00 +0000 | [diff] [blame] | 1091 | |
| 1092 | case FIB_SOURCE_CMP_WORSE: |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1093 | /* |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 1094 | * the source is not the best. no need to update forwarding |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1095 | */ |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 1096 | if (FIB_ENTRY_SRC_FLAG_ADDED & sflag) |
| 1097 | { |
| 1098 | /* |
| 1099 | * the source being removed still has paths |
| 1100 | */ |
| 1101 | return (FIB_ENTRY_SRC_FLAG_ADDED); |
| 1102 | } |
| 1103 | else |
| 1104 | { |
| 1105 | /* |
| 1106 | * that was the last path from this source, check if those |
| 1107 | * that remain are non-inherited |
| 1108 | */ |
| 1109 | if (FIB_ENTRY_SRC_FLAG_NONE == fib_entry_src_burn_only_inherited(fib_entry)) |
| 1110 | { |
| 1111 | /* |
| 1112 | * no more sources left. this entry is toast. |
| 1113 | */ |
Neale Ranns | 50bd1d3 | 2021-10-08 07:16:12 +0000 | [diff] [blame] | 1114 | fib_entry = fib_entry_post_flag_update_actions(fib_entry, bflags, ~0); |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 1115 | fib_entry_src_action_uninstall(fib_entry); |
| 1116 | return (FIB_ENTRY_SRC_FLAG_NONE); |
| 1117 | } |
Neale Ranns | 2303cb1 | 2018-02-21 04:57:17 -0800 | [diff] [blame] | 1118 | |
| 1119 | /* |
| 1120 | * reactivate the best source so the interposer gets restacked |
| 1121 | */ |
| 1122 | fib_entry_src_action_reactivate(fib_entry, best_source); |
| 1123 | |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 1124 | return (FIB_ENTRY_SRC_FLAG_ADDED); |
| 1125 | } |
Neale Ranns | 3bab8f9 | 2019-12-04 06:11:00 +0000 | [diff] [blame] | 1126 | break; |
| 1127 | |
| 1128 | case FIB_SOURCE_CMP_EQUAL: |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1129 | if (!(FIB_ENTRY_SRC_FLAG_ADDED & sflag)) |
| 1130 | { |
| 1131 | /* |
| 1132 | * the source was removed. use the next best. |
| 1133 | */ |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 1134 | return (fib_entry_source_removed(fib_entry, bflags)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1135 | } |
| 1136 | else |
| 1137 | { |
| 1138 | /* |
| 1139 | * re-install the new forwarding information |
| 1140 | */ |
| 1141 | fib_entry_src_action_reactivate(fib_entry, source); |
| 1142 | } |
Neale Ranns | 3bab8f9 | 2019-12-04 06:11:00 +0000 | [diff] [blame] | 1143 | break; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1144 | } |
| 1145 | |
| 1146 | fib_entry_post_update_actions(fib_entry, source, bflags); |
| 1147 | |
| 1148 | /* |
| 1149 | * still have sources |
| 1150 | */ |
| 1151 | return (FIB_ENTRY_SRC_FLAG_ADDED); |
| 1152 | } |
| 1153 | |
| 1154 | /** |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 1155 | * fib_entry_inherit |
| 1156 | * |
Paul Vinciguerra | 8feeaff | 2019-03-27 11:25:48 -0700 | [diff] [blame] | 1157 | * If the source on the cover is inheriting then push this source |
Neale Ranns | 8954199 | 2017-04-06 04:41:02 -0700 | [diff] [blame] | 1158 | * down to the covered. |
| 1159 | */ |
| 1160 | void |
| 1161 | fib_entry_inherit (fib_node_index_t cover, |
| 1162 | fib_node_index_t covered) |
| 1163 | { |
| 1164 | fib_entry_src_inherit(fib_entry_get(cover), |
| 1165 | fib_entry_get(covered)); |
| 1166 | } |
| 1167 | |
| 1168 | /** |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1169 | * fib_entry_delete |
| 1170 | * |
| 1171 | * The source is withdrawing all the paths it provided |
| 1172 | */ |
| 1173 | fib_entry_src_flag_t |
| 1174 | fib_entry_delete (fib_node_index_t fib_entry_index, |
| 1175 | fib_source_t source) |
| 1176 | { |
| 1177 | return (fib_entry_special_remove(fib_entry_index, source)); |
| 1178 | } |
| 1179 | |
| 1180 | /** |
| 1181 | * fib_entry_update |
| 1182 | * |
| 1183 | * The source has provided a new set of paths that will replace the old. |
| 1184 | */ |
| 1185 | void |
| 1186 | fib_entry_update (fib_node_index_t fib_entry_index, |
| 1187 | fib_source_t source, |
| 1188 | fib_entry_flag_t flags, |
| 1189 | const fib_route_path_t *paths) |
| 1190 | { |
| 1191 | fib_source_t best_source; |
| 1192 | fib_entry_flag_t bflags; |
| 1193 | fib_entry_t *fib_entry; |
Neale Ranns | a4e7766 | 2017-12-04 20:00:30 +0000 | [diff] [blame] | 1194 | fib_entry_src_t *bsrc; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1195 | |
| 1196 | fib_entry = fib_entry_get(fib_entry_index); |
| 1197 | ASSERT(NULL != fib_entry); |
| 1198 | |
| 1199 | bsrc = fib_entry_get_best_src_i(fib_entry); |
| 1200 | best_source = fib_entry_src_get_source(bsrc); |
Neale Ranns | 2303cb1 | 2018-02-21 04:57:17 -0800 | [diff] [blame] | 1201 | bflags = fib_entry_get_flags_i(fib_entry); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1202 | |
Neale Ranns | 2303cb1 | 2018-02-21 04:57:17 -0800 | [diff] [blame] | 1203 | fib_entry = fib_entry_src_action_path_swap(fib_entry, |
| 1204 | source, |
| 1205 | flags, |
| 1206 | paths); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1207 | |
Neale Ranns | 2303cb1 | 2018-02-21 04:57:17 -0800 | [diff] [blame] | 1208 | fib_entry_source_change_w_flags(fib_entry, best_source, bflags, source); |
Neale Ranns | 710071b | 2018-09-24 12:36:26 +0000 | [diff] [blame] | 1209 | FIB_ENTRY_DBG(fib_entry, "update"); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1210 | } |
| 1211 | |
| 1212 | |
| 1213 | /* |
| 1214 | * fib_entry_cover_changed |
| 1215 | * |
| 1216 | * this entry is tracking its cover and that cover has changed. |
| 1217 | */ |
| 1218 | void |
| 1219 | fib_entry_cover_changed (fib_node_index_t fib_entry_index) |
| 1220 | { |
| 1221 | fib_entry_src_cover_res_t res = { |
| 1222 | .install = !0, |
| 1223 | .bw_reason = FIB_NODE_BW_REASON_FLAG_NONE, |
| 1224 | }; |
Neale Ranns | 2303cb1 | 2018-02-21 04:57:17 -0800 | [diff] [blame] | 1225 | CLIB_UNUSED(fib_source_t source); |
| 1226 | fib_source_t best_source; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1227 | fib_entry_flag_t bflags; |
| 1228 | fib_entry_t *fib_entry; |
| 1229 | fib_entry_src_t *esrc; |
| 1230 | u32 index; |
| 1231 | |
| 1232 | bflags = FIB_ENTRY_FLAG_NONE; |
| 1233 | best_source = FIB_SOURCE_FIRST; |
| 1234 | fib_entry = fib_entry_get(fib_entry_index); |
| 1235 | |
| 1236 | fib_attached_export_cover_change(fib_entry); |
| 1237 | |
| 1238 | /* |
Paul Vinciguerra | 8feeaff | 2019-03-27 11:25:48 -0700 | [diff] [blame] | 1239 | * propagate the notification to each of the added sources |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1240 | */ |
| 1241 | index = 0; |
| 1242 | FOR_EACH_SRC_ADDED(fib_entry, esrc, source, |
| 1243 | ({ |
| 1244 | if (0 == index) |
| 1245 | { |
| 1246 | /* |
| 1247 | * only the best source gets to set the back walk flags |
| 1248 | */ |
Neale Ranns | 2303cb1 | 2018-02-21 04:57:17 -0800 | [diff] [blame] | 1249 | res = fib_entry_src_action_cover_change(fib_entry, esrc); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1250 | bflags = fib_entry_src_get_flags(esrc); |
| 1251 | best_source = fib_entry_src_get_source(esrc); |
| 1252 | } |
| 1253 | else |
| 1254 | { |
Neale Ranns | 2303cb1 | 2018-02-21 04:57:17 -0800 | [diff] [blame] | 1255 | fib_entry_src_action_cover_change(fib_entry, esrc); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1256 | } |
| 1257 | index++; |
| 1258 | })); |
| 1259 | |
| 1260 | if (res.install) |
| 1261 | { |
| 1262 | fib_entry_src_action_reactivate(fib_entry, |
| 1263 | fib_entry_src_get_source( |
| 1264 | fib_entry_get_best_src_i(fib_entry))); |
Neale Ranns | 981a690 | 2019-11-21 09:37:41 +0000 | [diff] [blame] | 1265 | fib_entry = fib_entry_post_install_actions(fib_entry, |
| 1266 | best_source, |
| 1267 | bflags); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1268 | } |
| 1269 | else |
| 1270 | { |
| 1271 | fib_entry_src_action_uninstall(fib_entry); |
| 1272 | } |
| 1273 | |
| 1274 | if (FIB_NODE_BW_REASON_FLAG_NONE != res.bw_reason) |
| 1275 | { |
| 1276 | /* |
| 1277 | * time for walkies fido. |
| 1278 | */ |
| 1279 | fib_node_back_walk_ctx_t bw_ctx = { |
| 1280 | .fnbw_reason = res.bw_reason, |
| 1281 | }; |
| 1282 | |
| 1283 | fib_walk_sync(FIB_NODE_TYPE_ENTRY, fib_entry_index, &bw_ctx); |
| 1284 | } |
Neale Ranns | 710071b | 2018-09-24 12:36:26 +0000 | [diff] [blame] | 1285 | FIB_ENTRY_DBG(fib_entry, "cover-changed"); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1286 | } |
| 1287 | |
| 1288 | /* |
| 1289 | * fib_entry_cover_updated |
| 1290 | * |
| 1291 | * this entry is tracking its cover and that cover has been updated |
| 1292 | * (i.e. its forwarding information has changed). |
| 1293 | */ |
| 1294 | void |
| 1295 | fib_entry_cover_updated (fib_node_index_t fib_entry_index) |
| 1296 | { |
| 1297 | fib_entry_src_cover_res_t res = { |
| 1298 | .install = !0, |
| 1299 | .bw_reason = FIB_NODE_BW_REASON_FLAG_NONE, |
| 1300 | }; |
Neale Ranns | 2303cb1 | 2018-02-21 04:57:17 -0800 | [diff] [blame] | 1301 | CLIB_UNUSED(fib_source_t source); |
| 1302 | fib_source_t best_source; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1303 | fib_entry_flag_t bflags; |
| 1304 | fib_entry_t *fib_entry; |
| 1305 | fib_entry_src_t *esrc; |
| 1306 | u32 index; |
| 1307 | |
| 1308 | bflags = FIB_ENTRY_FLAG_NONE; |
| 1309 | best_source = FIB_SOURCE_FIRST; |
| 1310 | fib_entry = fib_entry_get(fib_entry_index); |
| 1311 | |
| 1312 | fib_attached_export_cover_update(fib_entry); |
| 1313 | |
| 1314 | /* |
Paul Vinciguerra | 8feeaff | 2019-03-27 11:25:48 -0700 | [diff] [blame] | 1315 | * propagate the notification to each of the added sources |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1316 | */ |
| 1317 | index = 0; |
| 1318 | FOR_EACH_SRC_ADDED(fib_entry, esrc, source, |
| 1319 | ({ |
| 1320 | if (0 == index) |
| 1321 | { |
| 1322 | /* |
Neale Ranns | 8f5fef2 | 2020-12-21 08:29:34 +0000 | [diff] [blame] | 1323 | * only the best source gets to set the install result |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1324 | */ |
Neale Ranns | 2303cb1 | 2018-02-21 04:57:17 -0800 | [diff] [blame] | 1325 | res = fib_entry_src_action_cover_update(fib_entry, esrc); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1326 | bflags = fib_entry_src_get_flags(esrc); |
| 1327 | best_source = fib_entry_src_get_source(esrc); |
| 1328 | } |
| 1329 | else |
| 1330 | { |
Neale Ranns | 8f5fef2 | 2020-12-21 08:29:34 +0000 | [diff] [blame] | 1331 | /* |
| 1332 | * contirubting sources can set backwalk flags |
| 1333 | */ |
| 1334 | if (esrc->fes_flags & FIB_ENTRY_SRC_FLAG_CONTRIBUTING) |
| 1335 | { |
| 1336 | fib_entry_src_cover_res_t tmp = { |
| 1337 | .install = !0, |
| 1338 | .bw_reason = FIB_NODE_BW_REASON_FLAG_NONE, |
| 1339 | }; |
| 1340 | |
| 1341 | tmp = fib_entry_src_action_cover_update(fib_entry, esrc); |
| 1342 | res.bw_reason |= tmp.bw_reason; |
| 1343 | } |
| 1344 | else |
| 1345 | { |
| 1346 | fib_entry_src_action_cover_update(fib_entry, esrc); |
| 1347 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1348 | } |
| 1349 | index++; |
| 1350 | })); |
| 1351 | |
| 1352 | if (res.install) |
| 1353 | { |
| 1354 | fib_entry_src_action_reactivate(fib_entry, |
| 1355 | fib_entry_src_get_source( |
| 1356 | fib_entry_get_best_src_i(fib_entry))); |
Neale Ranns | 981a690 | 2019-11-21 09:37:41 +0000 | [diff] [blame] | 1357 | fib_entry = fib_entry_post_install_actions(fib_entry, |
| 1358 | best_source, |
| 1359 | bflags); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1360 | } |
| 1361 | else |
| 1362 | { |
| 1363 | fib_entry_src_action_uninstall(fib_entry); |
| 1364 | } |
| 1365 | |
| 1366 | if (FIB_NODE_BW_REASON_FLAG_NONE != res.bw_reason) |
| 1367 | { |
| 1368 | /* |
| 1369 | * time for walkies fido. |
| 1370 | */ |
| 1371 | fib_node_back_walk_ctx_t bw_ctx = { |
| 1372 | .fnbw_reason = res.bw_reason, |
| 1373 | }; |
| 1374 | |
| 1375 | fib_walk_sync(FIB_NODE_TYPE_ENTRY, fib_entry_index, &bw_ctx); |
| 1376 | } |
Neale Ranns | 710071b | 2018-09-24 12:36:26 +0000 | [diff] [blame] | 1377 | FIB_ENTRY_DBG(fib_entry, "cover-updated"); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1378 | } |
| 1379 | |
| 1380 | int |
| 1381 | fib_entry_recursive_loop_detect (fib_node_index_t entry_index, |
| 1382 | fib_node_index_t **entry_indicies) |
| 1383 | { |
| 1384 | fib_entry_t *fib_entry; |
| 1385 | int was_looped, is_looped; |
| 1386 | |
| 1387 | fib_entry = fib_entry_get(entry_index); |
| 1388 | |
| 1389 | if (FIB_NODE_INDEX_INVALID != fib_entry->fe_parent) |
| 1390 | { |
| 1391 | fib_node_index_t *entries = *entry_indicies; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1392 | |
| 1393 | vec_add1(entries, entry_index); |
| 1394 | was_looped = fib_path_list_is_looped(fib_entry->fe_parent); |
| 1395 | is_looped = fib_path_list_recursive_loop_detect(fib_entry->fe_parent, |
| 1396 | &entries); |
| 1397 | |
| 1398 | *entry_indicies = entries; |
| 1399 | |
| 1400 | if (!!was_looped != !!is_looped) |
| 1401 | { |
| 1402 | /* |
| 1403 | * re-evaluate all the entry's forwarding |
| 1404 | * NOTE: this is an inplace modify |
| 1405 | */ |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 1406 | fib_entry_delegate_type_t fdt; |
| 1407 | fib_entry_delegate_t *fed; |
| 1408 | |
| 1409 | FOR_EACH_DELEGATE_CHAIN(fib_entry, fdt, fed, |
| 1410 | { |
| 1411 | fib_entry_src_mk_lb(fib_entry, |
Neale Ranns | 1c59df7 | 2021-01-26 12:08:25 +0000 | [diff] [blame] | 1412 | fib_entry_get_best_source(entry_index), |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 1413 | fib_entry_delegate_type_to_chain_type(fdt), |
| 1414 | &fed->fd_dpo); |
| 1415 | }); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1416 | } |
| 1417 | } |
| 1418 | else |
| 1419 | { |
| 1420 | /* |
| 1421 | * the entry is currently not linked to a path-list. this happens |
| 1422 | * when it is this entry that is re-linking path-lists and has thus |
| 1423 | * broken the loop |
| 1424 | */ |
| 1425 | is_looped = 0; |
| 1426 | } |
| 1427 | |
| 1428 | return (is_looped); |
| 1429 | } |
| 1430 | |
Neale Ranns | 50bd1d3 | 2021-10-08 07:16:12 +0000 | [diff] [blame] | 1431 | /* |
| 1432 | * fib_entry_attached_cross_table |
| 1433 | * |
| 1434 | * Return true if the route is attached via an interface that |
| 1435 | * is not in the same table as the route |
| 1436 | */ |
| 1437 | static int |
| 1438 | fib_entry_attached_cross_table (const fib_entry_t *fib_entry, |
| 1439 | u32 fib_index) |
| 1440 | { |
| 1441 | const fib_prefix_t *pfx = &fib_entry->fe_prefix; |
| 1442 | |
| 1443 | switch (pfx->fp_proto) |
| 1444 | { |
| 1445 | case FIB_PROTOCOL_MPLS: |
| 1446 | /* MPLS routes are never imported/exported */ |
| 1447 | return (0); |
| 1448 | case FIB_PROTOCOL_IP6: |
| 1449 | /* Ignore link local addresses these also can't be imported/exported */ |
| 1450 | if (ip6_address_is_link_local_unicast (&pfx->fp_addr.ip6)) |
| 1451 | { |
| 1452 | return (0); |
| 1453 | } |
| 1454 | break; |
| 1455 | case FIB_PROTOCOL_IP4: |
| 1456 | break; |
| 1457 | } |
| 1458 | |
| 1459 | return (fib_entry->fe_fib_index != fib_index); |
| 1460 | } |
| 1461 | |
| 1462 | /* |
| 1463 | * fib_entry_back_walk_notify |
| 1464 | * |
| 1465 | * A back walk has reach this entry. |
| 1466 | */ |
| 1467 | static fib_node_back_walk_rc_t |
| 1468 | fib_entry_back_walk_notify (fib_node_t *node, |
| 1469 | fib_node_back_walk_ctx_t *ctx) |
| 1470 | { |
| 1471 | fib_source_t best_source; |
| 1472 | fib_entry_t *fib_entry; |
| 1473 | fib_entry_src_t *bsrc; |
| 1474 | |
| 1475 | fib_entry = fib_entry_from_fib_node(node); |
| 1476 | bsrc = fib_entry_get_best_src_i(fib_entry); |
| 1477 | best_source = fib_entry_src_get_source(bsrc); |
| 1478 | |
| 1479 | if (FIB_NODE_BW_REASON_FLAG_INTERFACE_BIND & ctx->fnbw_reason) |
| 1480 | { |
| 1481 | fib_entry_flag_t bflags; |
| 1482 | |
| 1483 | bflags = fib_entry_src_get_flags(bsrc); |
| 1484 | |
| 1485 | fib_entry_src_action_reactivate(fib_entry, best_source); |
| 1486 | |
| 1487 | /* re-evaluate whether the prefix is cross table */ |
| 1488 | if (fib_entry_attached_cross_table( |
| 1489 | fib_entry, ctx->interface_bind.fnbw_to_fib_index) && |
| 1490 | !(bsrc->fes_entry_flags & FIB_ENTRY_FLAG_NO_ATTACHED_EXPORT)) |
| 1491 | { |
| 1492 | bsrc->fes_entry_flags |= FIB_ENTRY_FLAG_IMPORT; |
| 1493 | } |
| 1494 | else |
| 1495 | { |
| 1496 | bsrc->fes_entry_flags &= ~FIB_ENTRY_FLAG_IMPORT; |
| 1497 | } |
| 1498 | |
| 1499 | fib_entry = fib_entry_post_flag_update_actions( |
| 1500 | fib_entry, bflags, |
| 1501 | ctx->interface_bind.fnbw_to_fib_index); |
| 1502 | } |
| 1503 | else if (FIB_NODE_BW_REASON_FLAG_EVALUATE & ctx->fnbw_reason || |
| 1504 | FIB_NODE_BW_REASON_FLAG_ADJ_UPDATE & ctx->fnbw_reason || |
| 1505 | FIB_NODE_BW_REASON_FLAG_ADJ_DOWN & ctx->fnbw_reason || |
| 1506 | FIB_NODE_BW_REASON_FLAG_INTERFACE_UP & ctx->fnbw_reason || |
| 1507 | FIB_NODE_BW_REASON_FLAG_INTERFACE_DOWN & ctx->fnbw_reason || |
| 1508 | FIB_NODE_BW_REASON_FLAG_INTERFACE_BIND & ctx->fnbw_reason || |
| 1509 | FIB_NODE_BW_REASON_FLAG_INTERFACE_DELETE & ctx->fnbw_reason) |
| 1510 | { |
| 1511 | fib_entry_src_action_reactivate(fib_entry, best_source); |
| 1512 | } |
| 1513 | |
| 1514 | /* |
| 1515 | * all other walk types can be reclassifed to a re-evaluate to |
| 1516 | * all recursive dependents. |
| 1517 | * By reclassifying we ensure that should any of these walk types meet |
| 1518 | * they can be merged. |
| 1519 | */ |
| 1520 | ctx->fnbw_reason = FIB_NODE_BW_REASON_FLAG_EVALUATE; |
| 1521 | |
| 1522 | /* |
| 1523 | * ... and nothing is forced sync from now on. |
| 1524 | */ |
| 1525 | ctx->fnbw_flags &= ~FIB_NODE_BW_FLAG_FORCE_SYNC; |
| 1526 | |
| 1527 | FIB_ENTRY_DBG(fib_entry, "bw:%U", |
| 1528 | format_fib_node_bw_reason, ctx->fnbw_reason); |
| 1529 | |
| 1530 | /* |
| 1531 | * propagate the backwalk further if we haven't already reached the |
| 1532 | * maximum depth. |
| 1533 | */ |
| 1534 | fib_walk_sync(FIB_NODE_TYPE_ENTRY, |
| 1535 | fib_entry_get_index(fib_entry), |
| 1536 | ctx); |
| 1537 | |
| 1538 | return (FIB_NODE_BACK_WALK_CONTINUE); |
| 1539 | } |
| 1540 | |
| 1541 | /* |
| 1542 | * The FIB path-list's graph node virtual function table |
| 1543 | */ |
| 1544 | static const fib_node_vft_t fib_entry_vft = { |
| 1545 | .fnv_get = fib_entry_get_node, |
| 1546 | .fnv_last_lock = fib_entry_last_lock_gone, |
| 1547 | .fnv_back_walk = fib_entry_back_walk_notify, |
| 1548 | .fnv_mem_show = fib_entry_show_memory, |
| 1549 | }; |
| 1550 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1551 | u32 |
| 1552 | fib_entry_get_resolving_interface (fib_node_index_t entry_index) |
| 1553 | { |
Neale Ranns | df089a8 | 2016-10-02 16:39:06 +0100 | [diff] [blame] | 1554 | fib_entry_t *fib_entry; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1555 | |
| 1556 | fib_entry = fib_entry_get(entry_index); |
| 1557 | |
| 1558 | return (fib_path_list_get_resolving_interface(fib_entry->fe_parent)); |
| 1559 | } |
| 1560 | |
Neale Ranns | cc4f7e1 | 2020-10-26 10:44:54 +0000 | [diff] [blame] | 1561 | u32 |
| 1562 | fib_entry_get_any_resolving_interface (fib_node_index_t entry_index) |
| 1563 | { |
| 1564 | const fib_entry_src_t *src; |
| 1565 | fib_entry_t *fib_entry; |
| 1566 | fib_source_t source; |
| 1567 | u32 sw_if_index; |
| 1568 | |
| 1569 | fib_entry = fib_entry_get(entry_index); |
| 1570 | |
| 1571 | FOR_EACH_SRC_ADDED(fib_entry, src, source, |
| 1572 | ({ |
| 1573 | sw_if_index = fib_entry_get_resolving_interface_for_source (entry_index, |
| 1574 | source); |
| 1575 | |
| 1576 | if (~0 != sw_if_index) |
| 1577 | break; |
| 1578 | })); |
| 1579 | return (sw_if_index); |
| 1580 | } |
| 1581 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1582 | fib_source_t |
| 1583 | fib_entry_get_best_source (fib_node_index_t entry_index) |
| 1584 | { |
| 1585 | fib_entry_t *fib_entry; |
Neale Ranns | a4e7766 | 2017-12-04 20:00:30 +0000 | [diff] [blame] | 1586 | fib_entry_src_t *bsrc; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1587 | |
| 1588 | fib_entry = fib_entry_get(entry_index); |
| 1589 | |
| 1590 | bsrc = fib_entry_get_best_src_i(fib_entry); |
| 1591 | return (fib_entry_src_get_source(bsrc)); |
| 1592 | } |
| 1593 | |
Neale Ranns | 88fc83e | 2017-04-05 08:11:14 -0700 | [diff] [blame] | 1594 | /** |
Neale Ranns | 56f949b | 2018-04-25 01:41:24 -0700 | [diff] [blame] | 1595 | * Return !0 is the entry represents a host prefix |
| 1596 | */ |
| 1597 | int |
| 1598 | fib_entry_is_host (fib_node_index_t fib_entry_index) |
| 1599 | { |
Neale Ranns | c5d4317 | 2018-07-30 08:04:40 -0700 | [diff] [blame] | 1600 | return (fib_prefix_is_host(fib_entry_get_prefix(fib_entry_index))); |
Neale Ranns | 56f949b | 2018-04-25 01:41:24 -0700 | [diff] [blame] | 1601 | } |
| 1602 | |
| 1603 | /** |
Paul Vinciguerra | 8feeaff | 2019-03-27 11:25:48 -0700 | [diff] [blame] | 1604 | * Return !0 is the entry is resolved, i.e. will return a valid forwarding |
Neale Ranns | 88fc83e | 2017-04-05 08:11:14 -0700 | [diff] [blame] | 1605 | * chain |
| 1606 | */ |
| 1607 | int |
| 1608 | fib_entry_is_resolved (fib_node_index_t fib_entry_index) |
| 1609 | { |
| 1610 | fib_entry_delegate_t *fed; |
| 1611 | fib_entry_t *fib_entry; |
| 1612 | |
| 1613 | fib_entry = fib_entry_get(fib_entry_index); |
| 1614 | |
Neale Ranns | 1f50bf8 | 2019-07-16 15:28:52 +0000 | [diff] [blame] | 1615 | fed = fib_entry_delegate_find(fib_entry, FIB_ENTRY_DELEGATE_BFD); |
Neale Ranns | 88fc83e | 2017-04-05 08:11:14 -0700 | [diff] [blame] | 1616 | |
| 1617 | if (NULL == fed) |
| 1618 | { |
| 1619 | /* |
Neale Ranns | 57b5860 | 2017-07-15 07:37:25 -0700 | [diff] [blame] | 1620 | * no BFD tracking - consider it resolved. |
Neale Ranns | 88fc83e | 2017-04-05 08:11:14 -0700 | [diff] [blame] | 1621 | */ |
| 1622 | return (!0); |
| 1623 | } |
| 1624 | else |
| 1625 | { |
| 1626 | /* |
| 1627 | * defer to the state of the BFD tracking |
| 1628 | */ |
| 1629 | return (FIB_BFD_STATE_UP == fed->fd_bfd_state); |
| 1630 | } |
| 1631 | } |
| 1632 | |
Neale Ranns | 227038a | 2017-04-21 01:07:59 -0700 | [diff] [blame] | 1633 | void |
| 1634 | fib_entry_set_flow_hash_config (fib_node_index_t fib_entry_index, |
| 1635 | flow_hash_config_t hash_config) |
| 1636 | { |
| 1637 | fib_entry_t *fib_entry; |
| 1638 | |
| 1639 | fib_entry = fib_entry_get(fib_entry_index); |
| 1640 | |
| 1641 | /* |
| 1642 | * pass the hash-config on to the load-balance object where it is cached. |
| 1643 | * we can ignore LBs in the delegate chains, since they will not be of the |
| 1644 | * correct protocol type (i.e. they are not IP) |
| 1645 | * There's no way, nor need, to change the hash config for MPLS. |
| 1646 | */ |
| 1647 | if (dpo_id_is_valid(&fib_entry->fe_lb)) |
| 1648 | { |
| 1649 | load_balance_t *lb; |
| 1650 | |
| 1651 | ASSERT(DPO_LOAD_BALANCE == fib_entry->fe_lb.dpoi_type); |
| 1652 | |
| 1653 | lb = load_balance_get(fib_entry->fe_lb.dpoi_index); |
| 1654 | |
| 1655 | /* |
| 1656 | * atomic update for packets in flight |
| 1657 | */ |
| 1658 | lb->lb_hash_config = hash_config; |
| 1659 | } |
| 1660 | } |
| 1661 | |
Neale Ranns | 008dbe1 | 2018-09-07 09:32:36 -0700 | [diff] [blame] | 1662 | u32 |
| 1663 | fib_entry_get_stats_index (fib_node_index_t fib_entry_index) |
| 1664 | { |
| 1665 | fib_entry_t *fib_entry; |
| 1666 | |
| 1667 | fib_entry = fib_entry_get(fib_entry_index); |
| 1668 | |
| 1669 | return (fib_entry->fe_lb.dpoi_index); |
| 1670 | } |
| 1671 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1672 | static int |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 1673 | fib_ip4_address_compare (const ip4_address_t * a1, |
| 1674 | const ip4_address_t * a2) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1675 | { |
| 1676 | /* |
Paul Vinciguerra | 8feeaff | 2019-03-27 11:25:48 -0700 | [diff] [blame] | 1677 | * IP addresses are unsigned ints. the return value here needs to be signed |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1678 | * a simple subtraction won't cut it. |
Paul Vinciguerra | 8feeaff | 2019-03-27 11:25:48 -0700 | [diff] [blame] | 1679 | * If the addresses are the same, the sort order is undefined, so phoey. |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1680 | */ |
| 1681 | return ((clib_net_to_host_u32(a1->data_u32) > |
| 1682 | clib_net_to_host_u32(a2->data_u32) ) ? |
| 1683 | 1 : -1); |
| 1684 | } |
| 1685 | |
| 1686 | static int |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 1687 | fib_ip6_address_compare (const ip6_address_t * a1, |
| 1688 | const ip6_address_t * a2) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1689 | { |
| 1690 | int i; |
| 1691 | for (i = 0; i < ARRAY_LEN (a1->as_u16); i++) |
| 1692 | { |
| 1693 | int cmp = (clib_net_to_host_u16 (a1->as_u16[i]) - |
| 1694 | clib_net_to_host_u16 (a2->as_u16[i])); |
| 1695 | if (cmp != 0) |
| 1696 | return cmp; |
| 1697 | } |
| 1698 | return 0; |
| 1699 | } |
| 1700 | |
| 1701 | static int |
| 1702 | fib_entry_cmp (fib_node_index_t fib_entry_index1, |
| 1703 | fib_node_index_t fib_entry_index2) |
| 1704 | { |
| 1705 | fib_entry_t *fib_entry1, *fib_entry2; |
| 1706 | int cmp = 0; |
| 1707 | |
| 1708 | fib_entry1 = fib_entry_get(fib_entry_index1); |
| 1709 | fib_entry2 = fib_entry_get(fib_entry_index2); |
| 1710 | |
| 1711 | switch (fib_entry1->fe_prefix.fp_proto) |
| 1712 | { |
| 1713 | case FIB_PROTOCOL_IP4: |
| 1714 | cmp = fib_ip4_address_compare(&fib_entry1->fe_prefix.fp_addr.ip4, |
| 1715 | &fib_entry2->fe_prefix.fp_addr.ip4); |
| 1716 | break; |
| 1717 | case FIB_PROTOCOL_IP6: |
| 1718 | cmp = fib_ip6_address_compare(&fib_entry1->fe_prefix.fp_addr.ip6, |
| 1719 | &fib_entry2->fe_prefix.fp_addr.ip6); |
| 1720 | break; |
| 1721 | case FIB_PROTOCOL_MPLS: |
| 1722 | cmp = (fib_entry1->fe_prefix.fp_label - fib_entry2->fe_prefix.fp_label); |
| 1723 | |
| 1724 | if (0 == cmp) |
| 1725 | { |
| 1726 | cmp = (fib_entry1->fe_prefix.fp_eos - fib_entry2->fe_prefix.fp_eos); |
| 1727 | } |
| 1728 | break; |
| 1729 | } |
| 1730 | |
| 1731 | if (0 == cmp) { |
| 1732 | cmp = (fib_entry1->fe_prefix.fp_len - fib_entry2->fe_prefix.fp_len); |
| 1733 | } |
| 1734 | return (cmp); |
| 1735 | } |
| 1736 | |
| 1737 | int |
| 1738 | fib_entry_cmp_for_sort (void *i1, void *i2) |
| 1739 | { |
| 1740 | fib_node_index_t *fib_entry_index1 = i1, *fib_entry_index2 = i2; |
| 1741 | |
| 1742 | return (fib_entry_cmp(*fib_entry_index1, |
| 1743 | *fib_entry_index2)); |
| 1744 | } |
| 1745 | |
| 1746 | void |
| 1747 | fib_entry_lock (fib_node_index_t fib_entry_index) |
| 1748 | { |
| 1749 | fib_entry_t *fib_entry; |
| 1750 | |
| 1751 | fib_entry = fib_entry_get(fib_entry_index); |
| 1752 | |
| 1753 | fib_node_lock(&fib_entry->fe_node); |
| 1754 | } |
| 1755 | |
| 1756 | void |
| 1757 | fib_entry_unlock (fib_node_index_t fib_entry_index) |
| 1758 | { |
| 1759 | fib_entry_t *fib_entry; |
| 1760 | |
| 1761 | fib_entry = fib_entry_get(fib_entry_index); |
| 1762 | |
| 1763 | fib_node_unlock(&fib_entry->fe_node); |
| 1764 | } |
| 1765 | |
| 1766 | void |
| 1767 | fib_entry_module_init (void) |
| 1768 | { |
Neale Ranns | 710071b | 2018-09-24 12:36:26 +0000 | [diff] [blame] | 1769 | fib_node_register_type(FIB_NODE_TYPE_ENTRY, &fib_entry_vft); |
| 1770 | fib_entry_logger = vlib_log_register_class("fib", "entry"); |
Neale Ranns | 1f50bf8 | 2019-07-16 15:28:52 +0000 | [diff] [blame] | 1771 | |
| 1772 | fib_entry_track_module_init(); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1773 | } |
| 1774 | |
Neale Ranns | 097fa66 | 2018-05-01 05:17:55 -0700 | [diff] [blame] | 1775 | fib_route_path_t * |
| 1776 | fib_entry_encode (fib_node_index_t fib_entry_index) |
Steven | 01b0712 | 2016-11-02 10:40:09 -0700 | [diff] [blame] | 1777 | { |
Neale Ranns | 775f73c | 2018-12-20 03:01:49 -0800 | [diff] [blame] | 1778 | fib_path_ext_list_t *ext_list; |
Neale Ranns | 097fa66 | 2018-05-01 05:17:55 -0700 | [diff] [blame] | 1779 | fib_path_encode_ctx_t ctx = { |
| 1780 | .rpaths = NULL, |
| 1781 | }; |
Steven | 01b0712 | 2016-11-02 10:40:09 -0700 | [diff] [blame] | 1782 | fib_entry_t *fib_entry; |
Neale Ranns | 775f73c | 2018-12-20 03:01:49 -0800 | [diff] [blame] | 1783 | fib_entry_src_t *bsrc; |
Steven | 01b0712 | 2016-11-02 10:40:09 -0700 | [diff] [blame] | 1784 | |
Neale Ranns | 775f73c | 2018-12-20 03:01:49 -0800 | [diff] [blame] | 1785 | ext_list = NULL; |
Steven | 01b0712 | 2016-11-02 10:40:09 -0700 | [diff] [blame] | 1786 | fib_entry = fib_entry_get(fib_entry_index); |
Neale Ranns | 775f73c | 2018-12-20 03:01:49 -0800 | [diff] [blame] | 1787 | bsrc = fib_entry_get_best_src_i(fib_entry); |
| 1788 | |
| 1789 | if (bsrc) |
| 1790 | { |
| 1791 | ext_list = &bsrc->fes_path_exts; |
| 1792 | } |
| 1793 | |
Neale Ranns | a8d9f30 | 2017-02-20 09:17:02 -0800 | [diff] [blame] | 1794 | if (FIB_NODE_INDEX_INVALID != fib_entry->fe_parent) |
| 1795 | { |
Neale Ranns | 775f73c | 2018-12-20 03:01:49 -0800 | [diff] [blame] | 1796 | fib_path_list_walk_w_ext(fib_entry->fe_parent, |
| 1797 | ext_list, |
| 1798 | fib_path_encode, |
Neale Ranns | 097fa66 | 2018-05-01 05:17:55 -0700 | [diff] [blame] | 1799 | &ctx); |
Neale Ranns | a8d9f30 | 2017-02-20 09:17:02 -0800 | [diff] [blame] | 1800 | } |
Neale Ranns | 097fa66 | 2018-05-01 05:17:55 -0700 | [diff] [blame] | 1801 | |
| 1802 | return (ctx.rpaths); |
Steven | 01b0712 | 2016-11-02 10:40:09 -0700 | [diff] [blame] | 1803 | } |
| 1804 | |
Neale Ranns | c5d4317 | 2018-07-30 08:04:40 -0700 | [diff] [blame] | 1805 | const fib_prefix_t * |
| 1806 | fib_entry_get_prefix (fib_node_index_t fib_entry_index) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1807 | { |
| 1808 | fib_entry_t *fib_entry; |
| 1809 | |
| 1810 | fib_entry = fib_entry_get(fib_entry_index); |
Neale Ranns | c5d4317 | 2018-07-30 08:04:40 -0700 | [diff] [blame] | 1811 | |
| 1812 | return (&fib_entry->fe_prefix); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1813 | } |
| 1814 | |
| 1815 | u32 |
| 1816 | fib_entry_get_fib_index (fib_node_index_t fib_entry_index) |
| 1817 | { |
| 1818 | fib_entry_t *fib_entry; |
| 1819 | |
| 1820 | fib_entry = fib_entry_get(fib_entry_index); |
| 1821 | |
| 1822 | return (fib_entry->fe_fib_index); |
| 1823 | } |
| 1824 | |
| 1825 | u32 |
| 1826 | fib_entry_pool_size (void) |
| 1827 | { |
| 1828 | return (pool_elts(fib_entry_pool)); |
| 1829 | } |
| 1830 | |
Matthew Smith | ee167e5 | 2020-07-02 17:24:17 -0500 | [diff] [blame] | 1831 | #if CLIB_DEBUG > 0 |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 1832 | void |
| 1833 | fib_table_assert_empty (const fib_table_t *fib_table) |
| 1834 | { |
| 1835 | fib_node_index_t *fei, *feis = NULL; |
| 1836 | fib_entry_t *fib_entry; |
| 1837 | |
Damjan Marion | b2c31b6 | 2020-12-13 21:47:40 +0100 | [diff] [blame] | 1838 | pool_foreach (fib_entry, fib_entry_pool) |
| 1839 | { |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 1840 | if (fib_entry->fe_fib_index == fib_table->ft_index) |
| 1841 | vec_add1 (feis, fib_entry_get_index(fib_entry)); |
Damjan Marion | b2c31b6 | 2020-12-13 21:47:40 +0100 | [diff] [blame] | 1842 | } |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 1843 | |
| 1844 | if (vec_len(feis)) |
| 1845 | { |
| 1846 | vec_foreach (fei, feis) |
| 1847 | clib_error ("%U", format_fib_entry, *fei, FIB_ENTRY_FORMAT_DETAIL); |
| 1848 | } |
| 1849 | |
| 1850 | ASSERT(0); |
| 1851 | } |
| 1852 | #endif |
| 1853 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1854 | static clib_error_t * |
| 1855 | show_fib_entry_command (vlib_main_t * vm, |
| 1856 | unformat_input_t * input, |
| 1857 | vlib_cli_command_t * cmd) |
| 1858 | { |
| 1859 | fib_node_index_t fei; |
| 1860 | |
| 1861 | if (unformat (input, "%d", &fei)) |
| 1862 | { |
| 1863 | /* |
| 1864 | * show one in detail |
| 1865 | */ |
| 1866 | if (!pool_is_free_index(fib_entry_pool, fei)) |
| 1867 | { |
| 1868 | vlib_cli_output (vm, "%d@%U", |
| 1869 | fei, |
| 1870 | format_fib_entry, fei, |
| 1871 | FIB_ENTRY_FORMAT_DETAIL2); |
| 1872 | } |
| 1873 | else |
| 1874 | { |
| 1875 | vlib_cli_output (vm, "entry %d invalid", fei); |
| 1876 | } |
| 1877 | } |
| 1878 | else |
| 1879 | { |
| 1880 | /* |
| 1881 | * show all |
| 1882 | */ |
| 1883 | vlib_cli_output (vm, "FIB Entries:"); |
Damjan Marion | b2c31b6 | 2020-12-13 21:47:40 +0100 | [diff] [blame] | 1884 | pool_foreach_index (fei, fib_entry_pool) |
| 1885 | { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1886 | vlib_cli_output (vm, "%d@%U", |
| 1887 | fei, |
| 1888 | format_fib_entry, fei, |
| 1889 | FIB_ENTRY_FORMAT_BRIEF); |
Damjan Marion | b2c31b6 | 2020-12-13 21:47:40 +0100 | [diff] [blame] | 1890 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1891 | } |
| 1892 | |
| 1893 | return (NULL); |
| 1894 | } |
| 1895 | |
| 1896 | VLIB_CLI_COMMAND (show_fib_entry, static) = { |
| 1897 | .path = "show fib entry", |
| 1898 | .function = show_fib_entry_command, |
| 1899 | .short_help = "show fib entry", |
| 1900 | }; |