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 #ifdef CLIB_DEBUG
 158     if (0 != fib_table->ft_total_route_counts)
 159         fib_table_assert_empty(fib_table);
 160 #endif
 161
 162     vec_foreach_index(source, fib_table->ft_src_route_counts)
 163     {
 164         ASSERT(0 == fib_table->ft_src_route_counts[source]);
 165     }
 166
 167     if (~0 != fib_table->ft_table_id)
 168     {
 169         hash_unset (ip6_main.fib_index_by_table_id, fib_table->ft_table_id);
 170     }
 171     vec_free(fib_table->ft_src_route_counts);
 172     pool_put_index(ip6_main.v6_fibs, fib_table->ft_index);
 173     pool_put(ip6_main.fibs, fib_table);
 174 }
 175
 176 fib_node_index_t
 177 ip6_fib_table_lookup (u32 fib_index,
 178                       const ip6_address_t *addr,
 179                       u32 len)
 180 {
 181     ip6_fib_table_instance_t *table;
 182     clib_bihash_kv_24_8_t kv, value;
 183     int i, n_p, rv;
 184     u64 fib;
 185
 186     table = &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING];
 187     n_p = vec_len (table->prefix_lengths_in_search_order);
 188
 189     kv.key[0] = addr->as_u64[0];
 190     kv.key[1] = addr->as_u64[1];
 191     fib = ((u64)((fib_index))<<32);
 192
 193     /*
 194      * start search from a mask length same length or shorter.
 195      * we don't want matches longer than the mask passed
 196      */
 197     i = 0;
 198     while (i < n_p && table->prefix_lengths_in_search_order[i] > len)
 199     {
 200         i++;
 201     }
 202
 203     for (; i < n_p; i++)
 204     {
 205         int dst_address_length = table->prefix_lengths_in_search_order[i];
 206         ip6_address_t * mask = &ip6_main.fib_masks[dst_address_length];
 207
 208         ASSERT(dst_address_length >= 0 && dst_address_length <= 128);
 209         //As lengths are decreasing, masks are increasingly specific.
 210         kv.key[0] &= mask->as_u64[0];
 211         kv.key[1] &= mask->as_u64[1];
 212         kv.key[2] = fib | dst_address_length;
 213
 214         rv = clib_bihash_search_inline_2_24_8(&table->ip6_hash, &kv, &value);
 215         if (rv == 0)
 216             return value.value;
 217     }
 218
 219     return (FIB_NODE_INDEX_INVALID);
 220 }
 221
 222 fib_node_index_t
 223 ip6_fib_table_lookup_exact_match (u32 fib_index,
 224                                   const ip6_address_t *addr,
 225                                   u32 len)
 226 {
 227     ip6_fib_table_instance_t *table;
 228     clib_bihash_kv_24_8_t kv, value;
 229     ip6_address_t *mask;
 230     u64 fib;
 231     int rv;
 232
 233     table = &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING];
 234     mask = &ip6_main.fib_masks[len];
 235     fib = ((u64)((fib_index))<<32);
 236
 237     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 238     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 239     kv.key[2] = fib | len;
 240
 241     rv = clib_bihash_search_inline_2_24_8(&table->ip6_hash, &kv, &value);
 242     if (rv == 0)
 243         return value.value;
 244
 245     return (FIB_NODE_INDEX_INVALID);
 246 }
 247
 248 static void
 249 compute_prefix_lengths_in_search_order (ip6_fib_table_instance_t *table)
 250 {
 251     int i;
 252     vec_reset_length (table->prefix_lengths_in_search_order);
 253     /* Note: bitmap reversed so this is in fact a longest prefix match */
 254     clib_bitmap_foreach (i, table->non_empty_dst_address_length_bitmap,
 255     ({
 256         int dst_address_length = 128 - i;
 257         vec_add1(table->prefix_lengths_in_search_order, dst_address_length);
 258     }));
 259 }
 260
 261 void
 262 ip6_fib_table_entry_remove (u32 fib_index,
 263                             const ip6_address_t *addr,
 264                             u32 len)
 265 {
 266     ip6_fib_table_instance_t *table;
 267     clib_bihash_kv_24_8_t kv;
 268     ip6_address_t *mask;
 269     u64 fib;
 270
 271     table = &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING];
 272     mask = &ip6_main.fib_masks[len];
 273     fib = ((u64)((fib_index))<<32);
 274
 275     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 276     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 277     kv.key[2] = fib | len;
 278
 279     clib_bihash_add_del_24_8(&table->ip6_hash, &kv, 0);
 280
 281     /* refcount accounting */
 282     ASSERT (table->dst_address_length_refcounts[len] > 0);
 283     if (--table->dst_address_length_refcounts[len] == 0)
 284     {
 285         table->non_empty_dst_address_length_bitmap =
 286             clib_bitmap_set (table->non_empty_dst_address_length_bitmap,
 287                              128 - len, 0);
 288         compute_prefix_lengths_in_search_order (table);
 289     }
 290 }
 291
 292 void
 293 ip6_fib_table_entry_insert (u32 fib_index,
 294                             const ip6_address_t *addr,
 295                             u32 len,
 296                             fib_node_index_t fib_entry_index)
 297 {
 298     ip6_fib_table_instance_t *table;
 299     clib_bihash_kv_24_8_t kv;
 300     ip6_address_t *mask;
 301     u64 fib;
 302
 303     table = &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING];
 304     mask = &ip6_main.fib_masks[len];
 305     fib = ((u64)((fib_index))<<32);
 306
 307     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 308     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 309     kv.key[2] = fib | len;
 310     kv.value = fib_entry_index;
 311
 312     clib_bihash_add_del_24_8(&table->ip6_hash, &kv, 1);
 313
 314     table->dst_address_length_refcounts[len]++;
 315
 316     table->non_empty_dst_address_length_bitmap =
 317         clib_bitmap_set (table->non_empty_dst_address_length_bitmap,
 318                          128 - len, 1);
 319     compute_prefix_lengths_in_search_order (table);
 320 }
 321
 322 u32 ip6_fib_table_fwding_lookup_with_if_index (ip6_main_t * im,
 323                                                u32 sw_if_index,
 324                                                const ip6_address_t * dst)
 325 {
 326     u32 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
 327     return ip6_fib_table_fwding_lookup(fib_index, dst);
 328 }
 329
 330 u32
 331 ip6_fib_table_get_index_for_sw_if_index (u32 sw_if_index)
 332 {
 333     if (sw_if_index >= vec_len(ip6_main.fib_index_by_sw_if_index))
 334     {
 335         /*
 336          * This is the case for interfaces that are not yet mapped to
 337          * a IP table
 338          */
 339         return (~0);
 340     }
 341     return (ip6_main.fib_index_by_sw_if_index[sw_if_index]);
 342 }
 343
 344 void
 345 ip6_fib_table_fwding_dpo_update (u32 fib_index,
 346                                  const ip6_address_t *addr,
 347                                  u32 len,
 348                                  const dpo_id_t *dpo)
 349 {
 350     ip6_fib_table_instance_t *table;
 351     clib_bihash_kv_24_8_t kv;
 352     ip6_address_t *mask;
 353     u64 fib;
 354
 355     table = &ip6_main.ip6_table[IP6_FIB_TABLE_FWDING];
 356     mask = &ip6_main.fib_masks[len];
 357     fib = ((u64)((fib_index))<<32);
 358
 359     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 360     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 361     kv.key[2] = fib | len;
 362     kv.value = dpo->dpoi_index;
 363
 364     clib_bihash_add_del_24_8(&table->ip6_hash, &kv, 1);
 365
 366     table->dst_address_length_refcounts[len]++;
 367
 368     table->non_empty_dst_address_length_bitmap =
 369         clib_bitmap_set (table->non_empty_dst_address_length_bitmap,
 370                          128 - len, 1);
 371     compute_prefix_lengths_in_search_order (table);
 372 }
 373
 374 void
 375 ip6_fib_table_fwding_dpo_remove (u32 fib_index,
 376                                  const ip6_address_t *addr,
 377                                  u32 len,
 378                                  const dpo_id_t *dpo)
 379 {
 380     ip6_fib_table_instance_t *table;
 381     clib_bihash_kv_24_8_t kv;
 382     ip6_address_t *mask;
 383     u64 fib;
 384
 385     table = &ip6_main.ip6_table[IP6_FIB_TABLE_FWDING];
 386     mask = &ip6_main.fib_masks[len];
 387     fib = ((u64)((fib_index))<<32);
 388
 389     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 390     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 391     kv.key[2] = fib | len;
 392     kv.value = dpo->dpoi_index;
 393
 394     clib_bihash_add_del_24_8(&table->ip6_hash, &kv, 0);
 395
 396     /* refcount accounting */
 397     ASSERT (table->dst_address_length_refcounts[len] > 0);
 398     if (--table->dst_address_length_refcounts[len] == 0)
 399     {
 400         table->non_empty_dst_address_length_bitmap =
 401             clib_bitmap_set (table->non_empty_dst_address_length_bitmap,
 402                              128 - len, 0);
 403         compute_prefix_lengths_in_search_order (table);
 404     }
 405 }
 406
 407 /**
 408  * @brief Context when walking the IPv6 table. Since all VRFs are in the
 409  * same hash table, we need to filter only those we need as we walk
 410  */
 411 typedef struct ip6_fib_walk_ctx_t_
 412 {
 413     u32 i6w_fib_index;
 414     fib_table_walk_fn_t i6w_fn;
 415     void *i6w_ctx;
 416     fib_prefix_t i6w_root;
 417     fib_prefix_t *i6w_sub_trees;
 418 } ip6_fib_walk_ctx_t;
 419
 420 static int
 421 ip6_fib_walk_cb (clib_bihash_kv_24_8_t * kvp,
 422                  void *arg)
 423 {
 424     ip6_fib_walk_ctx_t *ctx = arg;
 425     ip6_address_t key;
 426
 427     if ((kvp->key[2] >> 32) == ctx->i6w_fib_index)
 428     {
 429         key.as_u64[0] = kvp->key[0];
 430         key.as_u64[1] = kvp->key[1];
 431
 432         if (ip6_destination_matches_route(&ip6_main,
 433                                           &key,
 434                                           &ctx->i6w_root.fp_addr.ip6,
 435                                           ctx->i6w_root.fp_len))
 436         {
 437             const fib_prefix_t *sub_tree;
 438             int skip = 0;
 439
 440             /*
 441              * exclude sub-trees the walk does not want to explore
 442              */
 443             vec_foreach(sub_tree, ctx->i6w_sub_trees)
 444             {
 445                 if (ip6_destination_matches_route(&ip6_main,
 446                                                   &key,
 447                                                   &sub_tree->fp_addr.ip6,
 448                                                   sub_tree->fp_len))
 449                 {
 450                     skip = 1;
 451                     break;
 452                 }
 453             }
 454
 455             if (!skip)
 456             {
 457                 switch (ctx->i6w_fn(kvp->value, ctx->i6w_ctx))
 458                 {
 459                 case FIB_TABLE_WALK_CONTINUE:
 460                     break;
 461                 case FIB_TABLE_WALK_SUB_TREE_STOP: {
 462                     fib_prefix_t pfx = {
 463                         .fp_proto = FIB_PROTOCOL_IP6,
 464                         .fp_len = kvp->key[2] & 0xffffffff,
 465                         .fp_addr.ip6 = key,
 466                     };
 467                     vec_add1(ctx->i6w_sub_trees, pfx);
 468                     break;
 469                 }
 470                 case FIB_TABLE_WALK_STOP:
 471                     goto done;
 472                 }
 473             }
 474         }
 475     }
 476 done:
 477
 478     return (1);
 479 }
 480
 481 void
 482 ip6_fib_table_walk (u32 fib_index,
 483                     fib_table_walk_fn_t fn,
 484                     void *arg)
 485 {
 486     ip6_fib_walk_ctx_t ctx = {
 487         .i6w_fib_index = fib_index,
 488         .i6w_fn = fn,
 489         .i6w_ctx = arg,
 490         .i6w_root = {
 491             .fp_proto = FIB_PROTOCOL_IP6,
 492         },
 493         .i6w_sub_trees = NULL,
 494     };
 495
 496     clib_bihash_foreach_key_value_pair_24_8(
 497         &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
 498         ip6_fib_walk_cb,
 499         &ctx);
 500
 501     vec_free(ctx.i6w_sub_trees);
 502 }
 503
 504 void
 505 ip6_fib_table_sub_tree_walk (u32 fib_index,
 506                              const fib_prefix_t *root,
 507                              fib_table_walk_fn_t fn,
 508                              void *arg)
 509 {
 510     ip6_fib_walk_ctx_t ctx = {
 511         .i6w_fib_index = fib_index,
 512         .i6w_fn = fn,
 513         .i6w_ctx = arg,
 514         .i6w_root = *root,
 515     };
 516
 517     clib_bihash_foreach_key_value_pair_24_8(
 518         &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
 519         ip6_fib_walk_cb,
 520         &ctx);
 521 }
 522
 523 typedef struct ip6_fib_show_ctx_t_ {
 524     fib_node_index_t *entries;
 525 } ip6_fib_show_ctx_t;
 526
 527 static fib_table_walk_rc_t
 528 ip6_fib_table_show_walk (fib_node_index_t fib_entry_index,
 529                          void *arg)
 530 {
 531     ip6_fib_show_ctx_t *ctx = arg;
 532
 533     vec_add1(ctx->entries, fib_entry_index);
 534
 535     return (FIB_TABLE_WALK_CONTINUE);
 536 }
 537
 538 static void
 539 ip6_fib_table_show_all (ip6_fib_t *fib,
 540                         vlib_main_t * vm)
 541 {
 542     fib_node_index_t *fib_entry_index;
 543     ip6_fib_show_ctx_t ctx = {
 544         .entries = NULL,
 545     };
 546
 547     ip6_fib_table_walk(fib->index, ip6_fib_table_show_walk, &ctx);
 548     vec_sort_with_function(ctx.entries, fib_entry_cmp_for_sort);
 549
 550     vec_foreach(fib_entry_index, ctx.entries)
 551     {
 552         vlib_cli_output(vm, "%U",
 553                         format_fib_entry,
 554                         *fib_entry_index,
 555                         FIB_ENTRY_FORMAT_BRIEF);
 556     }
 557
 558     vec_free(ctx.entries);
 559 }
 560
 561 static void
 562 ip6_fib_table_show_one (ip6_fib_t *fib,
 563                         vlib_main_t * vm,
 564                         ip6_address_t *address,
 565                         u32 mask_len,
 566                         int detail)
 567 {
 568     vlib_cli_output(vm, "%U",
 569                     format_fib_entry,
 570                     ip6_fib_table_lookup(fib->index, address, mask_len),
 571                     (detail ?
 572                      FIB_ENTRY_FORMAT_DETAIL2:
 573                      FIB_ENTRY_FORMAT_DETAIL));
 574 }
 575
 576 u8 *
 577 format_ip6_fib_table_memory (u8 * s, va_list * args)
 578 {
 579     uword bytes_inuse;
 580
 581     bytes_inuse = (alloc_arena_next(&(ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash)) +
 582                    alloc_arena_next(&(ip6_main.ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash)));
 583
 584     s = format(s, "%=30s %=6d %=12ld\n",
 585                "IPv6 unicast",
 586                pool_elts(ip6_main.fibs),
 587                bytes_inuse);
 588     return (s);
 589 }
 590
 591 typedef struct {
 592   u32 fib_index;
 593   u64 count_by_prefix_length[129];
 594 } count_routes_in_fib_at_prefix_length_arg_t;
 595
 596 static int
 597 count_routes_in_fib_at_prefix_length (clib_bihash_kv_24_8_t * kvp,
 598                                       void *arg)
 599 {
 600   count_routes_in_fib_at_prefix_length_arg_t * ap = arg;
 601   int mask_width;
 602
 603   if ((kvp->key[2]>>32) != ap->fib_index)
 604       return (BIHASH_WALK_CONTINUE);
 605
 606   mask_width = kvp->key[2] & 0xFF;
 607
 608   ap->count_by_prefix_length[mask_width]++;
 609
 610   return (BIHASH_WALK_CONTINUE);
 611 }
 612
 613 static clib_error_t *
 614 ip6_show_fib (vlib_main_t * vm,
 615               unformat_input_t * input,
 616               vlib_cli_command_t * cmd)
 617 {
 618     count_routes_in_fib_at_prefix_length_arg_t _ca, *ca = &_ca;
 619     ip6_main_t * im6 = &ip6_main;
 620     fib_table_t *fib_table;
 621     ip6_fib_t * fib;
 622     int verbose, matching;
 623     ip6_address_t matching_address;
 624     u32 mask_len  = 128;
 625     int table_id = -1, fib_index = ~0;
 626     int detail = 0;
 627     int hash = 0;
 628
 629     verbose = 1;
 630     matching = 0;
 631
 632     while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
 633     {
 634         if (unformat (input, "brief")   ||
 635             unformat (input, "summary") ||
 636             unformat (input, "sum"))
 637             verbose = 0;
 638
 639         else if (unformat (input, "detail")   ||
 640                  unformat (input, "det"))
 641             detail = 1;
 642
 643         else if (unformat (input, "hash") ||
 644                  unformat (input, "mem") ||
 645                  unformat (input, "memory"))
 646             hash = 1;
 647
 648         else if (unformat (input, "%U/%d",
 649                            unformat_ip6_address, &matching_address, &mask_len))
 650             matching = 1;
 651
 652         else if (unformat (input, "%U", unformat_ip6_address, &matching_address))
 653             matching = 1;
 654
 655         else if (unformat (input, "table %d", &table_id))
 656             ;
 657         else if (unformat (input, "index %d", &fib_index))
 658             ;
 659         else
 660             break;
 661     }
 662
 663     if (hash)
 664     {
 665         vlib_cli_output (vm, "IPv6 Non-Forwarding Hash Table:\n%U\n",
 666                          BV (format_bihash),
 667                          &im6->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
 668                          detail);
 669         vlib_cli_output (vm, "IPv6 Forwarding Hash Table:\n%U\n",
 670                          BV (format_bihash),
 671                          &im6->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash,
 672                          detail);
 673         return (NULL);
 674     }
 675
 676     pool_foreach (fib_table, im6->fibs,
 677     ({
 678         fib_source_t source;
 679         u8 *s = NULL;
 680
 681         fib = pool_elt_at_index(im6->v6_fibs, fib_table->ft_index);
 682         if (table_id >= 0 && table_id != (int)fib->table_id)
 683             continue;
 684         if (fib_index != ~0 && fib_index != (int)fib->index)
 685             continue;
 686         if (fib_table->ft_flags & FIB_TABLE_FLAG_IP6_LL)
 687             continue;
 688
 689         s = format(s, "%U, fib_index:%d, flow hash:[%U] epoch:%d flags:%U locks:[",
 690                    format_fib_table_name, fib->index,
 691                    FIB_PROTOCOL_IP6,
 692                    fib->index,
 693                    format_ip_flow_hash_config,
 694                    fib_table->ft_flow_hash_config,
 695                    fib_table->ft_epoch,
 696                    format_fib_table_flags, fib_table->ft_flags);
 697
 698         vec_foreach_index(source, fib_table->ft_locks)
 699         {
 700             if (0 != fib_table->ft_locks[source])
 701             {
 702                 s = format(s, "%U:%d, ",
 703                            format_fib_source, source,
 704                            fib_table->ft_locks[source]);
 705             }
 706         }
 707         s = format (s, "]");
 708         vlib_cli_output (vm, "%v", s);
 709         vec_free(s);
 710
 711         /* Show summary? */
 712         if (! verbose)
 713         {
 714             clib_bihash_24_8_t * h = &im6->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash;
 715             int len;
 716
 717             vlib_cli_output (vm, "%=20s%=16s", "Prefix length", "Count");
 718
 719             clib_memset (ca, 0, sizeof(*ca));
 720             ca->fib_index = fib->index;
 721
 722             clib_bihash_foreach_key_value_pair_24_8
 723                 (h, count_routes_in_fib_at_prefix_length, ca);
 724
 725             for (len = 128; len >= 0; len--)
 726             {
 727                 if (ca->count_by_prefix_length[len])
 728                     vlib_cli_output (vm, "%=20d%=16lld",
 729                                      len, ca->count_by_prefix_length[len]);
 730             }
 731             continue;
 732         }
 733
 734         if (!matching)
 735         {
 736             ip6_fib_table_show_all(fib, vm);
 737         }
 738         else
 739         {
 740             ip6_fib_table_show_one(fib, vm, &matching_address, mask_len, detail);
 741         }
 742     }));
 743
 744     return 0;
 745 }
 746
 747 /*?
 748  * This command displays the IPv6 FIB Tables (VRF Tables) and the route
 749  * entries for each table.
 750  *
 751  * @note This command will run for a long time when the FIB tables are
 752  * comprised of millions of entries. For those senarios, consider displaying
 753  * in summary mode.
 754  *
 755  * @cliexpar
 756  * @parblock
 757  * Example of how to display all the IPv6 FIB tables:
 758  * @cliexstart{show ip6 fib}
 759  * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
 760  * @::/0
 761  *   unicast-ip6-chain
 762  *   [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
 763  *     [0] [@0]: dpo-drop ip6
 764  * fe80::/10
 765  *   unicast-ip6-chain
 766  *   [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
 767  *     [0] [@2]: dpo-receive
 768  * ff02::1/128
 769  *   unicast-ip6-chain
 770  *   [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
 771  *     [0] [@2]: dpo-receive
 772  * ff02::2/128
 773  *   unicast-ip6-chain
 774  *   [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
 775  *     [0] [@2]: dpo-receive
 776  * ff02::16/128
 777  *   unicast-ip6-chain
 778  *   [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
 779  *     [0] [@2]: dpo-receive
 780  * ff02::1:ff00:0/104
 781  *   unicast-ip6-chain
 782  *   [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
 783  *     [0] [@2]: dpo-receive
 784  * ipv6-VRF:8, fib_index 1, flow hash: src dst sport dport proto
 785  * @::/0
 786  *   unicast-ip6-chain
 787  *   [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
 788  *     [0] [@0]: dpo-drop ip6
 789  * @::a:1:1:0:4/126
 790  *   unicast-ip6-chain
 791  *   [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
 792  *     [0] [@4]: ipv6-glean: af_packet0
 793  * @::a:1:1:0:7/128
 794  *   unicast-ip6-chain
 795  *   [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
 796  *     [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
 797  * fe80::/10
 798  *   unicast-ip6-chain
 799  *   [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
 800  *     [0] [@2]: dpo-receive
 801  * fe80::fe:3eff:fe3e:9222/128
 802  *   unicast-ip6-chain
 803  *   [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
 804  *     [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
 805  * ff02::1/128
 806  *   unicast-ip6-chain
 807  *   [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
 808  *     [0] [@2]: dpo-receive
 809  * ff02::2/128
 810  *   unicast-ip6-chain
 811  *   [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
 812  *     [0] [@2]: dpo-receive
 813  * ff02::16/128
 814  *   unicast-ip6-chain
 815  *   [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
 816  *     [0] [@2]: dpo-receive
 817  * ff02::1:ff00:0/104
 818  *   unicast-ip6-chain
 819  *   [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
 820  *     [0] [@2]: dpo-receive
 821  * @cliexend
 822  *
 823  * Example of how to display a summary of all IPv6 FIB tables:
 824  * @cliexstart{show ip6 fib summary}
 825  * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
 826  *     Prefix length         Count
 827  *          128                3
 828  *          104                1
 829  *          10                 1
 830  *           0                 1
 831  * ipv6-VRF:8, fib_index 1, flow hash: src dst sport dport proto
 832  *     Prefix length         Count
 833  *          128                5
 834  *          126                1
 835  *          104                1
 836  *          10                 1
 837  *           0                 1
 838  * @cliexend
 839  * @endparblock
 840  ?*/
 841 /* *INDENT-OFF* */
 842 VLIB_CLI_COMMAND (ip6_show_fib_command, static) = {
 843     .path = "show ip6 fib",
 844     .short_help = "show ip6 fib [summary] [table <table-id>] [index <fib-id>] [<ip6-addr>[/<width>]] [detail]",
 845     .function = ip6_show_fib,
 846 };
 847 /* *INDENT-ON* */