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