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 #include <vppinfra/bihash_24_8.h>
  21 #include <vppinfra/bihash_template.c>
  22
  23 static void
  24 vnet_ip6_fib_init (u32 fib_index)
  25 {
  26     fib_prefix_t pfx = {
  27         .fp_proto = FIB_PROTOCOL_IP6,
  28         .fp_len = 0,
  29         .fp_addr = {
  30             .ip6 = {
  31                 { 0, 0, },
  32             },
  33         }
  34     };
  35
  36     /*
  37      * Add the default route.
  38      */
  39     fib_table_entry_special_add(fib_index,
  40                                 &pfx,
  41                                 FIB_SOURCE_DEFAULT_ROUTE,
  42                                 FIB_ENTRY_FLAG_DROP);
  43
  44     /*
  45      * all link local via the link local lookup DPO
  46      */
  47     pfx.fp_addr.ip6.as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
  48     pfx.fp_addr.ip6.as_u64[1] = 0;
  49     pfx.fp_len = 10;
  50     fib_table_entry_special_dpo_add(fib_index,
  51                                     &pfx,
  52                                     FIB_SOURCE_SPECIAL,
  53                                     FIB_ENTRY_FLAG_NONE,
  54                                     ip6_ll_dpo_get());
  55 }
  56
  57 static u32
  58 create_fib_with_table_id (u32 table_id,
  59                           fib_source_t src,
  60                           fib_table_flags_t flags,
  61                           u8 *desc)
  62 {
  63     fib_table_t *fib_table;
  64     ip6_fib_t *v6_fib;
  65
  66     pool_get(ip6_main.fibs, fib_table);
  67     pool_get_aligned(ip6_main.v6_fibs, v6_fib, CLIB_CACHE_LINE_BYTES);
  68
  69     clib_memset(fib_table, 0, sizeof(*fib_table));
  70     clib_memset(v6_fib, 0, sizeof(*v6_fib));
  71
  72     ASSERT((fib_table - ip6_main.fibs) ==
  73            (v6_fib - ip6_main.v6_fibs));
  74
  75     fib_table->ft_proto = FIB_PROTOCOL_IP6;
  76     fib_table->ft_index =
  77             v6_fib->index =
  78                 (fib_table - ip6_main.fibs);
  79
  80     hash_set(ip6_main.fib_index_by_table_id, table_id, fib_table->ft_index);
  81
  82     fib_table->ft_table_id =
  83         v6_fib->table_id =
  84             table_id;
  85     fib_table->ft_flow_hash_config = IP_FLOW_HASH_DEFAULT;
  86     fib_table->ft_flags = flags;
  87     fib_table->ft_desc = desc;
  88
  89     vnet_ip6_fib_init(fib_table->ft_index);
  90     fib_table_lock(fib_table->ft_index, FIB_PROTOCOL_IP6, src);
  91
  92     return (fib_table->ft_index);
  93 }
  94
  95 u32
  96 ip6_fib_table_find_or_create_and_lock (u32 table_id,
  97                                        fib_source_t src)
  98 {
  99     uword * p;
 100
 101     p = hash_get (ip6_main.fib_index_by_table_id, table_id);
 102     if (NULL == p)
 103         return create_fib_with_table_id(table_id, src,
 104                                         FIB_TABLE_FLAG_NONE,
 105                                         NULL);
 106
 107     fib_table_lock(p[0], FIB_PROTOCOL_IP6, src);
 108
 109     return (p[0]);
 110 }
 111
 112 u32
 113 ip6_fib_table_create_and_lock (fib_source_t src,
 114                                fib_table_flags_t flags,
 115                                u8 *desc)
 116 {
 117     return (create_fib_with_table_id(~0, src, flags, desc));
 118 }
 119
 120 void
 121 ip6_fib_table_destroy (u32 fib_index)
 122 {
 123     /*
 124      * all link local first ...
 125      */
 126     fib_prefix_t pfx = {
 127         .fp_proto = FIB_PROTOCOL_IP6,
 128         .fp_len = 10,
 129         .fp_addr = {
 130             .ip6 = {
 131                 .as_u8 = {
 132                     [0] = 0xFE,
 133                     [1] = 0x80,
 134                 },
 135             },
 136         }
 137     };
 138     fib_table_entry_delete(fib_index,
 139                            &pfx,
 140                            FIB_SOURCE_SPECIAL);
 141
 142     /*
 143      * ... then the default route.
 144      */
 145     pfx.fp_addr.ip6.as_u64[0] = 0;
 146     pfx.fp_len = 00;
 147     fib_table_entry_special_remove(fib_index,
 148                                    &pfx,
 149                                    FIB_SOURCE_DEFAULT_ROUTE);
 150
 151     fib_table_t *fib_table = fib_table_get(fib_index, FIB_PROTOCOL_IP6);
 152     fib_source_t source;
 153
 154      /*
 155      * validate no more routes.
 156      */
 157     ASSERT(0 == fib_table->ft_total_route_counts);
 158     FOR_EACH_FIB_SOURCE(source)
 159     {
 160         ASSERT(0 == fib_table->ft_src_route_counts[source]);
 161     }
 162
 163     if (~0 != fib_table->ft_table_id)
 164     {
 165         hash_unset (ip6_main.fib_index_by_table_id, fib_table->ft_table_id);
 166     }
 167     pool_put_index(ip6_main.v6_fibs, fib_table->ft_index);
 168     pool_put(ip6_main.fibs, fib_table);
 169 }
 170
 171 fib_node_index_t
 172 ip6_fib_table_lookup (u32 fib_index,
 173                       const ip6_address_t *addr,
 174                       u32 len)
 175 {
 176     ip6_fib_table_instance_t *table;
 177     clib_bihash_kv_24_8_t kv, value;
 178     int i, n_p, rv;
 179     u64 fib;
 180
 181     table = &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING];
 182     n_p = vec_len (table->prefix_lengths_in_search_order);
 183
 184     kv.key[0] = addr->as_u64[0];
 185     kv.key[1] = addr->as_u64[1];
 186     fib = ((u64)((fib_index))<<32);
 187
 188     /*
 189      * start search from a mask length same length or shorter.
 190      * we don't want matches longer than the mask passed
 191      */
 192     i = 0;
 193     while (i < n_p && table->prefix_lengths_in_search_order[i] > len)
 194     {
 195         i++;
 196     }
 197
 198     for (; i < n_p; i++)
 199     {
 200         int dst_address_length = table->prefix_lengths_in_search_order[i];
 201         ip6_address_t * mask = &ip6_main.fib_masks[dst_address_length];
 202
 203         ASSERT(dst_address_length >= 0 && dst_address_length <= 128);
 204         //As lengths are decreasing, masks are increasingly specific.
 205         kv.key[0] &= mask->as_u64[0];
 206         kv.key[1] &= mask->as_u64[1];
 207         kv.key[2] = fib | dst_address_length;
 208
 209         rv = clib_bihash_search_inline_2_24_8(&table->ip6_hash, &kv, &value);
 210         if (rv == 0)
 211             return value.value;
 212     }
 213
 214     return (FIB_NODE_INDEX_INVALID);
 215 }
 216
 217 fib_node_index_t
 218 ip6_fib_table_lookup_exact_match (u32 fib_index,
 219                                   const ip6_address_t *addr,
 220                                   u32 len)
 221 {
 222     ip6_fib_table_instance_t *table;
 223     clib_bihash_kv_24_8_t kv, value;
 224     ip6_address_t *mask;
 225     u64 fib;
 226     int rv;
 227
 228     table = &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING];
 229     mask = &ip6_main.fib_masks[len];
 230     fib = ((u64)((fib_index))<<32);
 231
 232     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 233     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 234     kv.key[2] = fib | len;
 235
 236     rv = clib_bihash_search_inline_2_24_8(&table->ip6_hash, &kv, &value);
 237     if (rv == 0)
 238         return value.value;
 239
 240     return (FIB_NODE_INDEX_INVALID);
 241 }
 242
 243 static void
 244 compute_prefix_lengths_in_search_order (ip6_fib_table_instance_t *table)
 245 {
 246     int i;
 247     vec_reset_length (table->prefix_lengths_in_search_order);
 248     /* Note: bitmap reversed so this is in fact a longest prefix match */
 249     clib_bitmap_foreach (i, table->non_empty_dst_address_length_bitmap,
 250     ({
 251         int dst_address_length = 128 - i;
 252         vec_add1(table->prefix_lengths_in_search_order, dst_address_length);
 253     }));
 254 }
 255
 256 void
 257 ip6_fib_table_entry_remove (u32 fib_index,
 258                             const ip6_address_t *addr,
 259                             u32 len)
 260 {
 261     ip6_fib_table_instance_t *table;
 262     clib_bihash_kv_24_8_t kv;
 263     ip6_address_t *mask;
 264     u64 fib;
 265
 266     table = &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING];
 267     mask = &ip6_main.fib_masks[len];
 268     fib = ((u64)((fib_index))<<32);
 269
 270     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 271     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 272     kv.key[2] = fib | len;
 273
 274     clib_bihash_add_del_24_8(&table->ip6_hash, &kv, 0);
 275
 276     /* refcount accounting */
 277     ASSERT (table->dst_address_length_refcounts[len] > 0);
 278     if (--table->dst_address_length_refcounts[len] == 0)
 279     {
 280         table->non_empty_dst_address_length_bitmap =
 281             clib_bitmap_set (table->non_empty_dst_address_length_bitmap,
 282                              128 - len, 0);
 283         compute_prefix_lengths_in_search_order (table);
 284     }
 285 }
 286
 287 void
 288 ip6_fib_table_entry_insert (u32 fib_index,
 289                             const ip6_address_t *addr,
 290                             u32 len,
 291                             fib_node_index_t fib_entry_index)
 292 {
 293     ip6_fib_table_instance_t *table;
 294     clib_bihash_kv_24_8_t kv;
 295     ip6_address_t *mask;
 296     u64 fib;
 297
 298     table = &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING];
 299     mask = &ip6_main.fib_masks[len];
 300     fib = ((u64)((fib_index))<<32);
 301
 302     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 303     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 304     kv.key[2] = fib | len;
 305     kv.value = fib_entry_index;
 306
 307     clib_bihash_add_del_24_8(&table->ip6_hash, &kv, 1);
 308
 309     table->dst_address_length_refcounts[len]++;
 310
 311     table->non_empty_dst_address_length_bitmap =
 312         clib_bitmap_set (table->non_empty_dst_address_length_bitmap,
 313                          128 - len, 1);
 314     compute_prefix_lengths_in_search_order (table);
 315 }
 316
 317 u32 ip6_fib_table_fwding_lookup_with_if_index (ip6_main_t * im,
 318                                                u32 sw_if_index,
 319                                                const ip6_address_t * dst)
 320 {
 321     u32 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
 322     return ip6_fib_table_fwding_lookup(fib_index, dst);
 323 }
 324
 325 u32
 326 ip6_fib_table_get_index_for_sw_if_index (u32 sw_if_index)
 327 {
 328     if (sw_if_index >= vec_len(ip6_main.fib_index_by_sw_if_index))
 329     {
 330         /*
 331          * This is the case for interfaces that are not yet mapped to
 332          * a IP table
 333          */
 334         return (~0);
 335     }
 336     return (ip6_main.fib_index_by_sw_if_index[sw_if_index]);
 337 }
 338
 339 void
 340 ip6_fib_table_fwding_dpo_update (u32 fib_index,
 341                                  const ip6_address_t *addr,
 342                                  u32 len,
 343                                  const dpo_id_t *dpo)
 344 {
 345     ip6_fib_table_instance_t *table;
 346     clib_bihash_kv_24_8_t kv;
 347     ip6_address_t *mask;
 348     u64 fib;
 349
 350     table = &ip6_main.ip6_table[IP6_FIB_TABLE_FWDING];
 351     mask = &ip6_main.fib_masks[len];
 352     fib = ((u64)((fib_index))<<32);
 353
 354     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 355     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 356     kv.key[2] = fib | len;
 357     kv.value = dpo->dpoi_index;
 358
 359     clib_bihash_add_del_24_8(&table->ip6_hash, &kv, 1);
 360
 361     table->dst_address_length_refcounts[len]++;
 362
 363     table->non_empty_dst_address_length_bitmap =
 364         clib_bitmap_set (table->non_empty_dst_address_length_bitmap,
 365                          128 - len, 1);
 366     compute_prefix_lengths_in_search_order (table);
 367 }
 368
 369 void
 370 ip6_fib_table_fwding_dpo_remove (u32 fib_index,
 371                                  const ip6_address_t *addr,
 372                                  u32 len,
 373                                  const dpo_id_t *dpo)
 374 {
 375     ip6_fib_table_instance_t *table;
 376     clib_bihash_kv_24_8_t kv;
 377     ip6_address_t *mask;
 378     u64 fib;
 379
 380     table = &ip6_main.ip6_table[IP6_FIB_TABLE_FWDING];
 381     mask = &ip6_main.fib_masks[len];
 382     fib = ((u64)((fib_index))<<32);
 383
 384     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 385     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 386     kv.key[2] = fib | len;
 387     kv.value = dpo->dpoi_index;
 388
 389     clib_bihash_add_del_24_8(&table->ip6_hash, &kv, 0);
 390
 391     /* refcount accounting */
 392     ASSERT (table->dst_address_length_refcounts[len] > 0);
 393     if (--table->dst_address_length_refcounts[len] == 0)
 394     {
 395         table->non_empty_dst_address_length_bitmap =
 396             clib_bitmap_set (table->non_empty_dst_address_length_bitmap,
 397                              128 - len, 0);
 398         compute_prefix_lengths_in_search_order (table);
 399     }
 400 }
 401
 402 /**
 403  * @brief Context when walking the IPv6 table. Since all VRFs are in the
 404  * same hash table, we need to filter only those we need as we walk
 405  */
 406 typedef struct ip6_fib_walk_ctx_t_
 407 {
 408     u32 i6w_fib_index;
 409     fib_table_walk_fn_t i6w_fn;
 410     void *i6w_ctx;
 411     fib_prefix_t i6w_root;
 412     fib_prefix_t *i6w_sub_trees;
 413 } ip6_fib_walk_ctx_t;
 414
 415 static int
 416 ip6_fib_walk_cb (clib_bihash_kv_24_8_t * kvp,
 417                  void *arg)
 418 {
 419     ip6_fib_walk_ctx_t *ctx = arg;
 420     ip6_address_t key;
 421
 422     if ((kvp->key[2] >> 32) == ctx->i6w_fib_index)
 423     {
 424         key.as_u64[0] = kvp->key[0];
 425         key.as_u64[1] = kvp->key[1];
 426
 427         if (ip6_destination_matches_route(&ip6_main,
 428                                           &key,
 429                                           &ctx->i6w_root.fp_addr.ip6,
 430                                           ctx->i6w_root.fp_len))
 431         {
 432             const fib_prefix_t *sub_tree;
 433             int skip = 0;
 434
 435             /*
 436              * exclude sub-trees the walk does not want to explore
 437              */
 438             vec_foreach(sub_tree, ctx->i6w_sub_trees)
 439             {
 440                 if (ip6_destination_matches_route(&ip6_main,
 441                                                   &key,
 442                                                   &sub_tree->fp_addr.ip6,
 443                                                   sub_tree->fp_len))
 444                 {
 445                     skip = 1;
 446                     break;
 447                 }
 448             }
 449
 450             if (!skip)
 451             {
 452                 switch (ctx->i6w_fn(kvp->value, ctx->i6w_ctx))
 453                 {
 454                 case FIB_TABLE_WALK_CONTINUE:
 455                     break;
 456                 case FIB_TABLE_WALK_SUB_TREE_STOP: {
 457                     fib_prefix_t pfx = {
 458                         .fp_proto = FIB_PROTOCOL_IP6,
 459                         .fp_len = kvp->key[2] & 0xffffffff,
 460                         .fp_addr.ip6 = key,
 461                     };
 462                     vec_add1(ctx->i6w_sub_trees, pfx);
 463                     break;
 464                 }
 465                 case FIB_TABLE_WALK_STOP:
 466                     goto done;
 467                 }
 468             }
 469         }
 470     }
 471 done:
 472
 473     return (1);
 474 }
 475
 476 void
 477 ip6_fib_table_walk (u32 fib_index,
 478                     fib_table_walk_fn_t fn,
 479                     void *arg)
 480 {
 481     ip6_fib_walk_ctx_t ctx = {
 482         .i6w_fib_index = fib_index,
 483         .i6w_fn = fn,
 484         .i6w_ctx = arg,
 485         .i6w_root = {
 486             .fp_proto = FIB_PROTOCOL_IP6,
 487         },
 488         .i6w_sub_trees = NULL,
 489     };
 490
 491     clib_bihash_foreach_key_value_pair_24_8(
 492         &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
 493         ip6_fib_walk_cb,
 494         &ctx);
 495
 496     vec_free(ctx.i6w_sub_trees);
 497 }
 498
 499 void
 500 ip6_fib_table_sub_tree_walk (u32 fib_index,
 501                              const fib_prefix_t *root,
 502                              fib_table_walk_fn_t fn,
 503                              void *arg)
 504 {
 505     ip6_fib_walk_ctx_t ctx = {
 506         .i6w_fib_index = fib_index,
 507         .i6w_fn = fn,
 508         .i6w_ctx = arg,
 509         .i6w_root = *root,
 510     };
 511
 512     clib_bihash_foreach_key_value_pair_24_8(
 513         &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
 514         ip6_fib_walk_cb,
 515         &ctx);
 516 }
 517
 518 typedef struct ip6_fib_show_ctx_t_ {
 519     fib_node_index_t *entries;
 520 } ip6_fib_show_ctx_t;
 521
 522 static fib_table_walk_rc_t
 523 ip6_fib_table_show_walk (fib_node_index_t fib_entry_index,
 524                          void *arg)
 525 {
 526     ip6_fib_show_ctx_t *ctx = arg;
 527
 528     vec_add1(ctx->entries, fib_entry_index);
 529
 530     return (FIB_TABLE_WALK_CONTINUE);
 531 }
 532
 533 static void
 534 ip6_fib_table_show_all (ip6_fib_t *fib,
 535                         vlib_main_t * vm)
 536 {
 537     fib_node_index_t *fib_entry_index;
 538     ip6_fib_show_ctx_t ctx = {
 539         .entries = NULL,
 540     };
 541
 542     ip6_fib_table_walk(fib->index, ip6_fib_table_show_walk, &ctx);
 543     vec_sort_with_function(ctx.entries, fib_entry_cmp_for_sort);
 544
 545     vec_foreach(fib_entry_index, ctx.entries)
 546     {
 547         vlib_cli_output(vm, "%U",
 548                         format_fib_entry,
 549                         *fib_entry_index,
 550                         FIB_ENTRY_FORMAT_BRIEF);
 551     }
 552
 553     vec_free(ctx.entries);
 554 }
 555
 556 static void
 557 ip6_fib_table_show_one (ip6_fib_t *fib,
 558                         vlib_main_t * vm,
 559                         ip6_address_t *address,
 560                         u32 mask_len,
 561                         int detail)
 562 {
 563     vlib_cli_output(vm, "%U",
 564                     format_fib_entry,
 565                     ip6_fib_table_lookup(fib->index, address, mask_len),
 566                     (detail ?
 567                      FIB_ENTRY_FORMAT_DETAIL2:
 568                      FIB_ENTRY_FORMAT_DETAIL));
 569 }
 570
 571 u8 *
 572 format_ip6_fib_table_memory (u8 * s, va_list * args)
 573 {
 574     uword bytes_inuse;
 575
 576     bytes_inuse = (alloc_arena_next(&(ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash)) +
 577                    alloc_arena_next(&(ip6_main.ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash)));
 578
 579     s = format(s, "%=30s %=6d %=12ld\n",
 580                "IPv6 unicast",
 581                pool_elts(ip6_main.fibs),
 582                bytes_inuse);
 583     return (s);
 584 }
 585
 586 typedef struct {
 587   u32 fib_index;
 588   u64 count_by_prefix_length[129];
 589 } count_routes_in_fib_at_prefix_length_arg_t;
 590
 591 static void
 592 count_routes_in_fib_at_prefix_length (clib_bihash_kv_24_8_t * kvp,
 593                                       void *arg)
 594 {
 595   count_routes_in_fib_at_prefix_length_arg_t * ap = arg;
 596   int mask_width;
 597
 598   if ((kvp->key[2]>>32) != ap->fib_index)
 599     return;
 600
 601   mask_width = kvp->key[2] & 0xFF;
 602
 603   ap->count_by_prefix_length[mask_width]++;
 604 }
 605
 606 static clib_error_t *
 607 ip6_show_fib (vlib_main_t * vm,
 608               unformat_input_t * input,
 609               vlib_cli_command_t * cmd)
 610 {
 611     count_routes_in_fib_at_prefix_length_arg_t _ca, *ca = &_ca;
 612     ip6_main_t * im6 = &ip6_main;
 613     fib_table_t *fib_table;
 614     ip6_fib_t * fib;
 615     int verbose, matching;
 616     ip6_address_t matching_address;
 617     u32 mask_len  = 128;
 618     int table_id = -1, fib_index = ~0;
 619     int detail = 0;
 620     int hash = 0;
 621
 622     verbose = 1;
 623     matching = 0;
 624
 625     while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
 626     {
 627         if (unformat (input, "brief")   ||
 628             unformat (input, "summary") ||
 629             unformat (input, "sum"))
 630             verbose = 0;
 631
 632         else if (unformat (input, "detail")   ||
 633                  unformat (input, "det"))
 634             detail = 1;
 635
 636         else if (unformat (input, "hash") ||
 637                  unformat (input, "mem") ||
 638                  unformat (input, "memory"))
 639             hash = 1;
 640
 641         else if (unformat (input, "%U/%d",
 642                            unformat_ip6_address, &matching_address, &mask_len))
 643             matching = 1;
 644
 645         else if (unformat (input, "%U", unformat_ip6_address, &matching_address))
 646             matching = 1;
 647
 648         else if (unformat (input, "table %d", &table_id))
 649             ;
 650         else if (unformat (input, "index %d", &fib_index))
 651             ;
 652         else
 653             break;
 654     }
 655
 656     if (hash)
 657     {
 658         vlib_cli_output (vm, "IPv6 Non-Forwarding Hash Table:\n%U\n",
 659                          BV (format_bihash),
 660                          &im6->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
 661                          detail);
 662         vlib_cli_output (vm, "IPv6 Forwarding Hash Table:\n%U\n",
 663                          BV (format_bihash),
 664                          &im6->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash,
 665                          detail);
 666         return (NULL);
 667     }
 668
 669     pool_foreach (fib_table, im6->fibs,
 670     ({
 671         fib_source_t source;
 672         u8 *s = NULL;
 673
 674         fib = pool_elt_at_index(im6->v6_fibs, fib_table->ft_index);
 675         if (table_id >= 0 && table_id != (int)fib->table_id)
 676             continue;
 677         if (fib_index != ~0 && fib_index != (int)fib->index)
 678             continue;
 679         if (fib_table->ft_flags & FIB_TABLE_FLAG_IP6_LL)
 680             continue;
 681
 682         s = format(s, "%U, fib_index:%d, flow hash:[%U] epoch:%d flags:%U locks:[",
 683                    format_fib_table_name, fib->index,
 684                    FIB_PROTOCOL_IP6,
 685                    fib->index,
 686                    format_ip_flow_hash_config,
 687                    fib_table->ft_flow_hash_config,
 688                    fib_table->ft_epoch,
 689                    format_fib_table_flags, fib_table->ft_flags);
 690
 691         FOR_EACH_FIB_SOURCE(source)
 692         {
 693             if (0 != fib_table->ft_locks[source])
 694             {
 695                 s = format(s, "%U:%d, ",
 696                            format_fib_source, source,
 697                            fib_table->ft_locks[source]);
 698             }
 699         }
 700         s = format (s, "]");
 701         vlib_cli_output (vm, "%v", s);
 702         vec_free(s);
 703
 704         /* Show summary? */
 705         if (! verbose)
 706         {
 707             clib_bihash_24_8_t * h = &im6->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash;
 708             int len;
 709
 710             vlib_cli_output (vm, "%=20s%=16s", "Prefix length", "Count");
 711
 712             clib_memset (ca, 0, sizeof(*ca));
 713             ca->fib_index = fib->index;
 714
 715             clib_bihash_foreach_key_value_pair_24_8
 716                 (h, count_routes_in_fib_at_prefix_length, ca);
 717
 718             for (len = 128; len >= 0; len--)
 719             {
 720                 if (ca->count_by_prefix_length[len])
 721                     vlib_cli_output (vm, "%=20d%=16lld",
 722                                      len, ca->count_by_prefix_length[len]);
 723             }
 724             continue;
 725         }
 726
 727         if (!matching)
 728         {
 729             ip6_fib_table_show_all(fib, vm);
 730         }
 731         else
 732         {
 733             ip6_fib_table_show_one(fib, vm, &matching_address, mask_len, detail);
 734         }
 735     }));
 736
 737     return 0;
 738 }
 739
 740 /*?
 741  * This command displays the IPv6 FIB Tables (VRF Tables) and the route
 742  * entries for each table.
 743  *
 744  * @note This command will run for a long time when the FIB tables are
 745  * comprised of millions of entries. For those senarios, consider displaying
 746  * in summary mode.
 747  *
 748  * @cliexpar
 749  * @parblock
 750  * Example of how to display all the IPv6 FIB tables:
 751  * @cliexstart{show ip6 fib}
 752  * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
 753  * @::/0
 754  *   unicast-ip6-chain
 755  *   [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
 756  *     [0] [@0]: dpo-drop ip6
 757  * fe80::/10
 758  *   unicast-ip6-chain
 759  *   [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
 760  *     [0] [@2]: dpo-receive
 761  * ff02::1/128
 762  *   unicast-ip6-chain
 763  *   [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
 764  *     [0] [@2]: dpo-receive
 765  * ff02::2/128
 766  *   unicast-ip6-chain
 767  *   [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
 768  *     [0] [@2]: dpo-receive
 769  * ff02::16/128
 770  *   unicast-ip6-chain
 771  *   [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
 772  *     [0] [@2]: dpo-receive
 773  * ff02::1:ff00:0/104
 774  *   unicast-ip6-chain
 775  *   [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
 776  *     [0] [@2]: dpo-receive
 777  * ipv6-VRF:8, fib_index 1, flow hash: src dst sport dport proto
 778  * @::/0
 779  *   unicast-ip6-chain
 780  *   [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
 781  *     [0] [@0]: dpo-drop ip6
 782  * @::a:1:1:0:4/126
 783  *   unicast-ip6-chain
 784  *   [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
 785  *     [0] [@4]: ipv6-glean: af_packet0
 786  * @::a:1:1:0:7/128
 787  *   unicast-ip6-chain
 788  *   [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
 789  *     [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
 790  * fe80::/10
 791  *   unicast-ip6-chain
 792  *   [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
 793  *     [0] [@2]: dpo-receive
 794  * fe80::fe:3eff:fe3e:9222/128
 795  *   unicast-ip6-chain
 796  *   [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
 797  *     [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
 798  * ff02::1/128
 799  *   unicast-ip6-chain
 800  *   [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
 801  *     [0] [@2]: dpo-receive
 802  * ff02::2/128
 803  *   unicast-ip6-chain
 804  *   [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
 805  *     [0] [@2]: dpo-receive
 806  * ff02::16/128
 807  *   unicast-ip6-chain
 808  *   [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
 809  *     [0] [@2]: dpo-receive
 810  * ff02::1:ff00:0/104
 811  *   unicast-ip6-chain
 812  *   [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
 813  *     [0] [@2]: dpo-receive
 814  * @cliexend
 815  *
 816  * Example of how to display a summary of all IPv6 FIB tables:
 817  * @cliexstart{show ip6 fib summary}
 818  * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
 819  *     Prefix length         Count
 820  *          128                3
 821  *          104                1
 822  *          10                 1
 823  *           0                 1
 824  * ipv6-VRF:8, fib_index 1, flow hash: src dst sport dport proto
 825  *     Prefix length         Count
 826  *          128                5
 827  *          126                1
 828  *          104                1
 829  *          10                 1
 830  *           0                 1
 831  * @cliexend
 832  * @endparblock
 833  ?*/
 834 /* *INDENT-OFF* */
 835 VLIB_CLI_COMMAND (ip6_show_fib_command, static) = {
 836     .path = "show ip6 fib",
 837     .short_help = "show ip6 fib [summary] [table <table-id>] [index <fib-id>] [<ip6-addr>[/<width>]] [detail]",
 838     .function = ip6_show_fib,
 839 };
 840 /* *INDENT-ON* */