src/vnet/fib/ip6_fib.c

   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/fib/ip6_fib.h>
  17 #include <vnet/fib/fib_table.h>
  18 #include <vnet/dpo/ip6_ll_dpo.h>
  19
  20 static void
  21 vnet_ip6_fib_init (u32 fib_index)
  22 {
  23     fib_prefix_t pfx = {
  24         .fp_proto = FIB_PROTOCOL_IP6,
  25         .fp_len = 0,
  26         .fp_addr = {
  27             .ip6 = {
  28                 { 0, 0, },
  29             },
  30         }
  31     };
  32
  33     /*
  34      * Add the default route.
  35      */
  36     fib_table_entry_special_add(fib_index,
  37                                 &pfx,
  38                                 FIB_SOURCE_DEFAULT_ROUTE,
  39                                 FIB_ENTRY_FLAG_DROP);
  40
  41     /*
  42      * all link local via the link local lookup DPO
  43      */
  44     pfx.fp_addr.ip6.as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
  45     pfx.fp_addr.ip6.as_u64[1] = 0;
  46     pfx.fp_len = 10;
  47     fib_table_entry_special_dpo_add(fib_index,
  48                                     &pfx,
  49                                     FIB_SOURCE_SPECIAL,
  50                                     FIB_ENTRY_FLAG_NONE,
  51                                     ip6_ll_dpo_get());
  52 }
  53
  54 static u32
  55 create_fib_with_table_id (u32 table_id,
  56                           fib_source_t src,
  57                           fib_table_flags_t flags,
  58                           u8 *desc)
  59 {
  60     fib_table_t *fib_table;
  61     ip6_fib_t *v6_fib;
  62
  63     pool_get(ip6_main.fibs, fib_table);
  64     pool_get_aligned(ip6_main.v6_fibs, v6_fib, CLIB_CACHE_LINE_BYTES);
  65
  66     memset(fib_table, 0, sizeof(*fib_table));
  67     memset(v6_fib, 0, sizeof(*v6_fib));
  68
  69     ASSERT((fib_table - ip6_main.fibs) ==
  70            (v6_fib - ip6_main.v6_fibs));
  71
  72     fib_table->ft_proto = FIB_PROTOCOL_IP6;
  73     fib_table->ft_index =
  74             v6_fib->index =
  75                 (fib_table - ip6_main.fibs);
  76
  77     hash_set(ip6_main.fib_index_by_table_id, table_id, fib_table->ft_index);
  78
  79     fib_table->ft_table_id =
  80         v6_fib->table_id =
  81             table_id;
  82     fib_table->ft_flow_hash_config = IP_FLOW_HASH_DEFAULT;
  83     fib_table->ft_flags = flags;
  84     fib_table->ft_desc = desc;
  85
  86     vnet_ip6_fib_init(fib_table->ft_index);
  87     fib_table_lock(fib_table->ft_index, FIB_PROTOCOL_IP6, src);
  88
  89     return (fib_table->ft_index);
  90 }
  91
  92 u32
  93 ip6_fib_table_find_or_create_and_lock (u32 table_id,
  94                                        fib_source_t src)
  95 {
  96     uword * p;
  97
  98     p = hash_get (ip6_main.fib_index_by_table_id, table_id);
  99     if (NULL == p)
 100         return create_fib_with_table_id(table_id, src,
 101                                         FIB_TABLE_FLAG_NONE,
 102                                         NULL);
 103
 104     fib_table_lock(p[0], FIB_PROTOCOL_IP6, src);
 105
 106     return (p[0]);
 107 }
 108
 109 u32
 110 ip6_fib_table_create_and_lock (fib_source_t src,
 111                                fib_table_flags_t flags,
 112                                u8 *desc)
 113 {
 114     return (create_fib_with_table_id(~0, src, flags, desc));
 115 }
 116
 117 void
 118 ip6_fib_table_destroy (u32 fib_index)
 119 {
 120     /*
 121      * all link local first ...
 122      */
 123     fib_prefix_t pfx = {
 124         .fp_proto = FIB_PROTOCOL_IP6,
 125         .fp_len = 10,
 126         .fp_addr = {
 127             .ip6 = {
 128                 .as_u8 = {
 129                     [0] = 0xFE,
 130                     [1] = 0x80,
 131                 },
 132             },
 133         }
 134     };
 135     fib_table_entry_delete(fib_index,
 136                            &pfx,
 137                            FIB_SOURCE_SPECIAL);
 138
 139     /*
 140      * ... then the default route.
 141      */
 142     pfx.fp_addr.ip6.as_u64[0] = 0;
 143     pfx.fp_len = 00;
 144     fib_table_entry_special_remove(fib_index,
 145                                    &pfx,
 146                                    FIB_SOURCE_DEFAULT_ROUTE);
 147
 148     fib_table_t *fib_table = fib_table_get(fib_index, FIB_PROTOCOL_IP6);
 149     fib_source_t source;
 150
 151      /*
 152      * validate no more routes.
 153      */
 154     ASSERT(0 == fib_table->ft_total_route_counts);
 155     FOR_EACH_FIB_SOURCE(source)
 156     {
 157         ASSERT(0 == fib_table->ft_src_route_counts[source]);
 158     }
 159
 160     if (~0 != fib_table->ft_table_id)
 161     {
 162         hash_unset (ip6_main.fib_index_by_table_id, fib_table->ft_table_id);
 163     }
 164     pool_put_index(ip6_main.v6_fibs, fib_table->ft_index);
 165     pool_put(ip6_main.fibs, fib_table);
 166 }
 167
 168 fib_node_index_t
 169 ip6_fib_table_lookup (u32 fib_index,
 170                       const ip6_address_t *addr,
 171                       u32 len)
 172 {
 173     ip6_fib_table_instance_t *table;
 174     BVT(clib_bihash_kv) kv, value;
 175     int i, n_p, rv;
 176     u64 fib;
 177
 178     table = &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING];
 179     n_p = vec_len (table->prefix_lengths_in_search_order);
 180
 181     kv.key[0] = addr->as_u64[0];
 182     kv.key[1] = addr->as_u64[1];
 183     fib = ((u64)((fib_index))<<32);
 184
 185     /*
 186      * start search from a mask length same length or shorter.
 187      * we don't want matches longer than the mask passed
 188      */
 189     i = 0;
 190     while (i < n_p && table->prefix_lengths_in_search_order[i] > len)
 191     {
 192         i++;
 193     }
 194
 195     for (; i < n_p; i++)
 196     {
 197         int dst_address_length = table->prefix_lengths_in_search_order[i];
 198         ip6_address_t * mask = &ip6_main.fib_masks[dst_address_length];
 199
 200         ASSERT(dst_address_length >= 0 && dst_address_length <= 128);
 201         //As lengths are decreasing, masks are increasingly specific.
 202         kv.key[0] &= mask->as_u64[0];
 203         kv.key[1] &= mask->as_u64[1];
 204         kv.key[2] = fib | dst_address_length;
 205
 206         rv = BV(clib_bihash_search_inline_2)(&table->ip6_hash, &kv, &value);
 207         if (rv == 0)
 208             return value.value;
 209     }
 210
 211     return (FIB_NODE_INDEX_INVALID);
 212 }
 213
 214 fib_node_index_t
 215 ip6_fib_table_lookup_exact_match (u32 fib_index,
 216                                   const ip6_address_t *addr,
 217                                   u32 len)
 218 {
 219     ip6_fib_table_instance_t *table;
 220     BVT(clib_bihash_kv) kv, value;
 221     ip6_address_t *mask;
 222     u64 fib;
 223     int rv;
 224
 225     table = &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING];
 226     mask = &ip6_main.fib_masks[len];
 227     fib = ((u64)((fib_index))<<32);
 228
 229     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 230     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 231     kv.key[2] = fib | len;
 232
 233     rv = BV(clib_bihash_search_inline_2)(&table->ip6_hash, &kv, &value);
 234     if (rv == 0)
 235         return value.value;
 236
 237     return (FIB_NODE_INDEX_INVALID);
 238 }
 239
 240 static void
 241 compute_prefix_lengths_in_search_order (ip6_fib_table_instance_t *table)
 242 {
 243     int i;
 244     vec_reset_length (table->prefix_lengths_in_search_order);
 245     /* Note: bitmap reversed so this is in fact a longest prefix match */
 246     clib_bitmap_foreach (i, table->non_empty_dst_address_length_bitmap,
 247     ({
 248         int dst_address_length = 128 - i;
 249         vec_add1(table->prefix_lengths_in_search_order, dst_address_length);
 250     }));
 251 }
 252
 253 void
 254 ip6_fib_table_entry_remove (u32 fib_index,
 255                             const ip6_address_t *addr,
 256                             u32 len)
 257 {
 258     ip6_fib_table_instance_t *table;
 259     BVT(clib_bihash_kv) kv;
 260     ip6_address_t *mask;
 261     u64 fib;
 262
 263     table = &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING];
 264     mask = &ip6_main.fib_masks[len];
 265     fib = ((u64)((fib_index))<<32);
 266
 267     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 268     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 269     kv.key[2] = fib | len;
 270
 271     BV(clib_bihash_add_del)(&table->ip6_hash, &kv, 0);
 272
 273     /* refcount accounting */
 274     ASSERT (table->dst_address_length_refcounts[len] > 0);
 275     if (--table->dst_address_length_refcounts[len] == 0)
 276     {
 277         table->non_empty_dst_address_length_bitmap =
 278             clib_bitmap_set (table->non_empty_dst_address_length_bitmap,
 279                              128 - len, 0);
 280         compute_prefix_lengths_in_search_order (table);
 281     }
 282 }
 283
 284 void
 285 ip6_fib_table_entry_insert (u32 fib_index,
 286                             const ip6_address_t *addr,
 287                             u32 len,
 288                             fib_node_index_t fib_entry_index)
 289 {
 290     ip6_fib_table_instance_t *table;
 291     BVT(clib_bihash_kv) kv;
 292     ip6_address_t *mask;
 293     u64 fib;
 294
 295     table = &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING];
 296     mask = &ip6_main.fib_masks[len];
 297     fib = ((u64)((fib_index))<<32);
 298
 299     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 300     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 301     kv.key[2] = fib | len;
 302     kv.value = fib_entry_index;
 303
 304     BV(clib_bihash_add_del)(&table->ip6_hash, &kv, 1);
 305
 306     table->dst_address_length_refcounts[len]++;
 307
 308     table->non_empty_dst_address_length_bitmap =
 309         clib_bitmap_set (table->non_empty_dst_address_length_bitmap,
 310                          128 - len, 1);
 311     compute_prefix_lengths_in_search_order (table);
 312 }
 313
 314 u32 ip6_fib_table_fwding_lookup_with_if_index (ip6_main_t * im,
 315                                                u32 sw_if_index,
 316                                                const ip6_address_t * dst)
 317 {
 318     u32 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
 319     return ip6_fib_table_fwding_lookup(im, fib_index, dst);
 320 }
 321
 322 u32
 323 ip6_fib_table_get_index_for_sw_if_index (u32 sw_if_index)
 324 {
 325     if (sw_if_index >= vec_len(ip6_main.fib_index_by_sw_if_index))
 326     {
 327         /*
 328          * This is the case for interfaces that are not yet mapped to
 329          * a IP table
 330          */
 331         return (~0);
 332     }
 333     return (ip6_main.fib_index_by_sw_if_index[sw_if_index]);
 334 }
 335
 336 void
 337 ip6_fib_table_fwding_dpo_update (u32 fib_index,
 338                                  const ip6_address_t *addr,
 339                                  u32 len,
 340                                  const dpo_id_t *dpo)
 341 {
 342     ip6_fib_table_instance_t *table;
 343     BVT(clib_bihash_kv) kv;
 344     ip6_address_t *mask;
 345     u64 fib;
 346
 347     table = &ip6_main.ip6_table[IP6_FIB_TABLE_FWDING];
 348     mask = &ip6_main.fib_masks[len];
 349     fib = ((u64)((fib_index))<<32);
 350
 351     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 352     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 353     kv.key[2] = fib | len;
 354     kv.value = dpo->dpoi_index;
 355
 356     BV(clib_bihash_add_del)(&table->ip6_hash, &kv, 1);
 357
 358     table->dst_address_length_refcounts[len]++;
 359
 360     table->non_empty_dst_address_length_bitmap =
 361         clib_bitmap_set (table->non_empty_dst_address_length_bitmap,
 362                          128 - len, 1);
 363     compute_prefix_lengths_in_search_order (table);
 364 }
 365
 366 void
 367 ip6_fib_table_fwding_dpo_remove (u32 fib_index,
 368                                  const ip6_address_t *addr,
 369                                  u32 len,
 370                                  const dpo_id_t *dpo)
 371 {
 372     ip6_fib_table_instance_t *table;
 373     BVT(clib_bihash_kv) kv;
 374     ip6_address_t *mask;
 375     u64 fib;
 376
 377     table = &ip6_main.ip6_table[IP6_FIB_TABLE_FWDING];
 378     mask = &ip6_main.fib_masks[len];
 379     fib = ((u64)((fib_index))<<32);
 380
 381     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 382     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 383     kv.key[2] = fib | len;
 384     kv.value = dpo->dpoi_index;
 385
 386     BV(clib_bihash_add_del)(&table->ip6_hash, &kv, 0);
 387
 388     /* refcount accounting */
 389     ASSERT (table->dst_address_length_refcounts[len] > 0);
 390     if (--table->dst_address_length_refcounts[len] == 0)
 391     {
 392         table->non_empty_dst_address_length_bitmap =
 393             clib_bitmap_set (table->non_empty_dst_address_length_bitmap,
 394                              128 - len, 0);
 395         compute_prefix_lengths_in_search_order (table);
 396     }
 397 }
 398
 399 /**
 400  * @brief Context when walking the IPv6 table. Since all VRFs are in the
 401  * same hash table, we need to filter only those we need as we walk
 402  */
 403 typedef struct ip6_fib_walk_ctx_t_
 404 {
 405     u32 i6w_fib_index;
 406     fib_table_walk_fn_t i6w_fn;
 407     void *i6w_ctx;
 408     fib_prefix_t i6w_root;
 409     fib_prefix_t *i6w_sub_trees;
 410 } ip6_fib_walk_ctx_t;
 411
 412 static int
 413 ip6_fib_walk_cb (clib_bihash_kv_24_8_t * kvp,
 414                  void *arg)
 415 {
 416     ip6_fib_walk_ctx_t *ctx = arg;
 417     ip6_address_t key;
 418
 419     if ((kvp->key[2] >> 32) == ctx->i6w_fib_index)
 420     {
 421         key.as_u64[0] = kvp->key[0];
 422         key.as_u64[1] = kvp->key[1];
 423
 424         if (ip6_destination_matches_route(&ip6_main,
 425                                           &key,
 426                                           &ctx->i6w_root.fp_addr.ip6,
 427                                           ctx->i6w_root.fp_len))
 428         {
 429             const fib_prefix_t *sub_tree;
 430             int skip = 0;
 431
 432             /*
 433              * exclude sub-trees the walk does not want to explore
 434              */
 435             vec_foreach(sub_tree, ctx->i6w_sub_trees)
 436             {
 437                 if (ip6_destination_matches_route(&ip6_main,
 438                                                   &key,
 439                                                   &sub_tree->fp_addr.ip6,
 440                                                   sub_tree->fp_len))
 441                 {
 442                     skip = 1;
 443                     break;
 444                 }
 445             }
 446
 447             if (!skip)
 448             {
 449                 switch (ctx->i6w_fn(kvp->value, ctx->i6w_ctx))
 450                 {
 451                 case FIB_TABLE_WALK_CONTINUE:
 452                     break;
 453                 case FIB_TABLE_WALK_SUB_TREE_STOP: {
 454                     fib_prefix_t pfx = {
 455                         .fp_proto = FIB_PROTOCOL_IP6,
 456                         .fp_len = kvp->key[2] & 0xffffffff,
 457                         .fp_addr.ip6 = key,
 458                     };
 459                     vec_add1(ctx->i6w_sub_trees, pfx);
 460                     break;
 461                 }
 462                 case FIB_TABLE_WALK_STOP:
 463                     goto done;
 464                 }
 465             }
 466         }
 467     }
 468 done:
 469
 470     return (1);
 471 }
 472
 473 void
 474 ip6_fib_table_walk (u32 fib_index,
 475                     fib_table_walk_fn_t fn,
 476                     void *arg)
 477 {
 478     ip6_fib_walk_ctx_t ctx = {
 479         .i6w_fib_index = fib_index,
 480         .i6w_fn = fn,
 481         .i6w_ctx = arg,
 482         .i6w_root = {
 483             .fp_proto = FIB_PROTOCOL_IP6,
 484         },
 485         .i6w_sub_trees = NULL,
 486     };
 487
 488     BV(clib_bihash_foreach_key_value_pair)(
 489         &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
 490         ip6_fib_walk_cb,
 491         &ctx);
 492
 493     vec_free(ctx.i6w_sub_trees);
 494 }
 495
 496 void
 497 ip6_fib_table_sub_tree_walk (u32 fib_index,
 498                              const fib_prefix_t *root,
 499                              fib_table_walk_fn_t fn,
 500                              void *arg)
 501 {
 502     ip6_fib_walk_ctx_t ctx = {
 503         .i6w_fib_index = fib_index,
 504         .i6w_fn = fn,
 505         .i6w_ctx = arg,
 506         .i6w_root = *root,
 507     };
 508
 509     BV(clib_bihash_foreach_key_value_pair)(
 510         &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
 511         ip6_fib_walk_cb,
 512         &ctx);
 513 }
 514
 515 typedef struct ip6_fib_show_ctx_t_ {
 516     fib_node_index_t *entries;
 517 } ip6_fib_show_ctx_t;
 518
 519 static fib_table_walk_rc_t
 520 ip6_fib_table_show_walk (fib_node_index_t fib_entry_index,
 521                          void *arg)
 522 {
 523     ip6_fib_show_ctx_t *ctx = arg;
 524
 525     vec_add1(ctx->entries, fib_entry_index);
 526
 527     return (FIB_TABLE_WALK_CONTINUE);
 528 }
 529
 530 static void
 531 ip6_fib_table_show_all (ip6_fib_t *fib,
 532                         vlib_main_t * vm)
 533 {
 534     fib_node_index_t *fib_entry_index;
 535     ip6_fib_show_ctx_t ctx = {
 536         .entries = NULL,
 537     };
 538
 539     ip6_fib_table_walk(fib->index, ip6_fib_table_show_walk, &ctx);
 540     vec_sort_with_function(ctx.entries, fib_entry_cmp_for_sort);
 541
 542     vec_foreach(fib_entry_index, ctx.entries)
 543     {
 544         vlib_cli_output(vm, "%U",
 545                         format_fib_entry,
 546                         *fib_entry_index,
 547                         FIB_ENTRY_FORMAT_BRIEF);
 548     }
 549
 550     vec_free(ctx.entries);
 551 }
 552
 553 static void
 554 ip6_fib_table_show_one (ip6_fib_t *fib,
 555                         vlib_main_t * vm,
 556                         ip6_address_t *address,
 557                         u32 mask_len,
 558                         int detail)
 559 {
 560     vlib_cli_output(vm, "%U",
 561                     format_fib_entry,
 562                     ip6_fib_table_lookup(fib->index, address, mask_len),
 563                     (detail ?
 564                      FIB_ENTRY_FORMAT_DETAIL2:
 565                      FIB_ENTRY_FORMAT_DETAIL));
 566 }
 567
 568 u8 *
 569 format_ip6_fib_table_memory (u8 * s, va_list * args)
 570 {
 571     uword bytes_inuse;
 572
 573     bytes_inuse =
 574         alloc_arena_next
 575         (&(ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash))
 576         - alloc_arena (&(ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash));
 577
 578     bytes_inuse +=
 579         alloc_arena_next(&(ip6_main.ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash))
 580         - alloc_arena(&(ip6_main.ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash));
 581
 582     s = format(s, "%=30s %=6d %=8ld\n",
 583                "IPv6 unicast",
 584                pool_elts(ip6_main.fibs),
 585                bytes_inuse);
 586     return (s);
 587 }
 588
 589 typedef struct {
 590   u32 fib_index;
 591   u64 count_by_prefix_length[129];
 592 } count_routes_in_fib_at_prefix_length_arg_t;
 593
 594 static void
 595 count_routes_in_fib_at_prefix_length (BVT(clib_bihash_kv) * kvp,
 596                                       void *arg)
 597 {
 598   count_routes_in_fib_at_prefix_length_arg_t * ap = arg;
 599   int mask_width;
 600
 601   if ((kvp->key[2]>>32) != ap->fib_index)
 602     return;
 603
 604   mask_width = kvp->key[2] & 0xFF;
 605
 606   ap->count_by_prefix_length[mask_width]++;
 607 }
 608
 609 static clib_error_t *
 610 ip6_show_fib (vlib_main_t * vm,
 611               unformat_input_t * input,
 612               vlib_cli_command_t * cmd)
 613 {
 614     count_routes_in_fib_at_prefix_length_arg_t _ca, *ca = &_ca;
 615     ip6_main_t * im6 = &ip6_main;
 616     fib_table_t *fib_table;
 617     ip6_fib_t * fib;
 618     int verbose, matching;
 619     ip6_address_t matching_address;
 620     u32 mask_len  = 128;
 621     int table_id = -1, fib_index = ~0;
 622     int detail = 0;
 623
 624     verbose = 1;
 625     matching = 0;
 626
 627     while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
 628     {
 629         if (unformat (input, "brief")   ||
 630             unformat (input, "summary") ||
 631             unformat (input, "sum"))
 632             verbose = 0;
 633
 634         else if (unformat (input, "detail")   ||
 635                  unformat (input, "det"))
 636             detail = 1;
 637
 638         else if (unformat (input, "%U/%d",
 639                            unformat_ip6_address, &matching_address, &mask_len))
 640             matching = 1;
 641
 642         else if (unformat (input, "%U", unformat_ip6_address, &matching_address))
 643             matching = 1;
 644
 645         else if (unformat (input, "table %d", &table_id))
 646             ;
 647         else if (unformat (input, "index %d", &fib_index))
 648             ;
 649         else
 650             break;
 651     }
 652
 653     pool_foreach (fib_table, im6->fibs,
 654     ({
 655         fib_source_t source;
 656         u8 *s = NULL;
 657
 658         fib = pool_elt_at_index(im6->v6_fibs, fib_table->ft_index);
 659         if (table_id >= 0 && table_id != (int)fib->table_id)
 660             continue;
 661         if (fib_index != ~0 && fib_index != (int)fib->index)
 662             continue;
 663         if (fib_table->ft_flags & FIB_TABLE_FLAG_IP6_LL)
 664             continue;
 665
 666         s = format(s, "%U, fib_index:%d, flow hash:[%U] locks:[",
 667                    format_fib_table_name, fib->index,
 668                    FIB_PROTOCOL_IP6,
 669                    fib->index,
 670                    format_ip_flow_hash_config,
 671                    fib_table->ft_flow_hash_config);
 672         FOR_EACH_FIB_SOURCE(source)
 673         {
 674             if (0 != fib_table->ft_locks[source])
 675             {
 676                 s = format(s, "%U:%d, ",
 677                            format_fib_source, source,
 678                            fib_table->ft_locks[source]);
 679             }
 680         }
 681         s = format (s, "]");
 682         vlib_cli_output (vm, "%v", s);
 683         vec_free(s);
 684
 685         /* Show summary? */
 686         if (! verbose)
 687         {
 688             BVT(clib_bihash) * h = &im6->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash;
 689             int len;
 690
 691             vlib_cli_output (vm, "%=20s%=16s", "Prefix length", "Count");
 692
 693             memset (ca, 0, sizeof(*ca));
 694             ca->fib_index = fib->index;
 695
 696             BV(clib_bihash_foreach_key_value_pair)
 697                 (h, count_routes_in_fib_at_prefix_length, ca);
 698
 699             for (len = 128; len >= 0; len--)
 700             {
 701                 if (ca->count_by_prefix_length[len])
 702                     vlib_cli_output (vm, "%=20d%=16lld",
 703                                      len, ca->count_by_prefix_length[len]);
 704             }
 705             continue;
 706         }
 707
 708         if (!matching)
 709         {
 710             ip6_fib_table_show_all(fib, vm);
 711         }
 712         else
 713         {
 714             ip6_fib_table_show_one(fib, vm, &matching_address, mask_len, detail);
 715         }
 716     }));
 717
 718     return 0;
 719 }
 720
 721 /*?
 722  * This command displays the IPv6 FIB Tables (VRF Tables) and the route
 723  * entries for each table.
 724  *
 725  * @note This command will run for a long time when the FIB tables are
 726  * comprised of millions of entries. For those senarios, consider displaying
 727  * in summary mode.
 728  *
 729  * @cliexpar
 730  * @parblock
 731  * Example of how to display all the IPv6 FIB tables:
 732  * @cliexstart{show ip6 fib}
 733  * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
 734  * @::/0
 735  *   unicast-ip6-chain
 736  *   [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
 737  *     [0] [@0]: dpo-drop ip6
 738  * fe80::/10
 739  *   unicast-ip6-chain
 740  *   [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
 741  *     [0] [@2]: dpo-receive
 742  * ff02::1/128
 743  *   unicast-ip6-chain
 744  *   [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
 745  *     [0] [@2]: dpo-receive
 746  * ff02::2/128
 747  *   unicast-ip6-chain
 748  *   [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
 749  *     [0] [@2]: dpo-receive
 750  * ff02::16/128
 751  *   unicast-ip6-chain
 752  *   [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
 753  *     [0] [@2]: dpo-receive
 754  * ff02::1:ff00:0/104
 755  *   unicast-ip6-chain
 756  *   [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
 757  *     [0] [@2]: dpo-receive
 758  * ipv6-VRF:8, fib_index 1, flow hash: src dst sport dport proto
 759  * @::/0
 760  *   unicast-ip6-chain
 761  *   [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
 762  *     [0] [@0]: dpo-drop ip6
 763  * @::a:1:1:0:4/126
 764  *   unicast-ip6-chain
 765  *   [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
 766  *     [0] [@4]: ipv6-glean: af_packet0
 767  * @::a:1:1:0:7/128
 768  *   unicast-ip6-chain
 769  *   [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
 770  *     [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
 771  * fe80::/10
 772  *   unicast-ip6-chain
 773  *   [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
 774  *     [0] [@2]: dpo-receive
 775  * fe80::fe:3eff:fe3e:9222/128
 776  *   unicast-ip6-chain
 777  *   [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
 778  *     [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
 779  * ff02::1/128
 780  *   unicast-ip6-chain
 781  *   [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
 782  *     [0] [@2]: dpo-receive
 783  * ff02::2/128
 784  *   unicast-ip6-chain
 785  *   [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
 786  *     [0] [@2]: dpo-receive
 787  * ff02::16/128
 788  *   unicast-ip6-chain
 789  *   [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
 790  *     [0] [@2]: dpo-receive
 791  * ff02::1:ff00:0/104
 792  *   unicast-ip6-chain
 793  *   [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
 794  *     [0] [@2]: dpo-receive
 795  * @cliexend
 796  *
 797  * Example of how to display a summary of all IPv6 FIB tables:
 798  * @cliexstart{show ip6 fib summary}
 799  * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
 800  *     Prefix length         Count
 801  *          128                3
 802  *          104                1
 803  *          10                 1
 804  *           0                 1
 805  * ipv6-VRF:8, fib_index 1, flow hash: src dst sport dport proto
 806  *     Prefix length         Count
 807  *          128                5
 808  *          126                1
 809  *          104                1
 810  *          10                 1
 811  *           0                 1
 812  * @cliexend
 813  * @endparblock
 814  ?*/
 815 /* *INDENT-OFF* */
 816 VLIB_CLI_COMMAND (ip6_show_fib_command, static) = {
 817     .path = "show ip6 fib",
 818     .short_help = "show ip6 fib [summary] [table <table-id>] [index <fib-id>] [<ip6-addr>[/<width>]] [detail]",
 819     .function = ip6_show_fib,
 820 };
 821 /* *INDENT-ON* */