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 #if CLIB_DEBUG > 0
 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     u8 *old, *prefix_lengths_in_search_order = NULL;
 252     int i;
 253
 254     /*
 255      * build the list in a scratch space then cutover so the workers
 256      * can continue uninterrupted.
 257      */
 258     old = table->prefix_lengths_in_search_order;
 259
 260     /* Note: bitmap reversed so this is in fact a longest prefix match */
 261     clib_bitmap_foreach (i, table->non_empty_dst_address_length_bitmap,
 262     ({
 263         int dst_address_length = 128 - i;
 264         vec_add1(prefix_lengths_in_search_order, dst_address_length);
 265     }));
 266
 267     table->prefix_lengths_in_search_order = prefix_lengths_in_search_order;
 268
 269     /*
 270      * let the workers go once round the track before we free the old set
 271      */
 272     vlib_worker_wait_one_loop();
 273     vec_free(old);
 274 }
 275
 276 void
 277 ip6_fib_table_entry_remove (u32 fib_index,
 278                             const ip6_address_t *addr,
 279                             u32 len)
 280 {
 281     ip6_fib_table_instance_t *table;
 282     clib_bihash_kv_24_8_t kv;
 283     ip6_address_t *mask;
 284     u64 fib;
 285
 286     table = &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING];
 287     mask = &ip6_main.fib_masks[len];
 288     fib = ((u64)((fib_index))<<32);
 289
 290     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 291     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 292     kv.key[2] = fib | len;
 293
 294     clib_bihash_add_del_24_8(&table->ip6_hash, &kv, 0);
 295
 296     /* refcount accounting */
 297     ASSERT (table->dst_address_length_refcounts[len] > 0);
 298     if (--table->dst_address_length_refcounts[len] == 0)
 299     {
 300         table->non_empty_dst_address_length_bitmap =
 301             clib_bitmap_set (table->non_empty_dst_address_length_bitmap,
 302                              128 - len, 0);
 303         compute_prefix_lengths_in_search_order (table);
 304     }
 305 }
 306
 307 void
 308 ip6_fib_table_entry_insert (u32 fib_index,
 309                             const ip6_address_t *addr,
 310                             u32 len,
 311                             fib_node_index_t fib_entry_index)
 312 {
 313     ip6_fib_table_instance_t *table;
 314     clib_bihash_kv_24_8_t kv;
 315     ip6_address_t *mask;
 316     u64 fib;
 317
 318     table = &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING];
 319     mask = &ip6_main.fib_masks[len];
 320     fib = ((u64)((fib_index))<<32);
 321
 322     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 323     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 324     kv.key[2] = fib | len;
 325     kv.value = fib_entry_index;
 326
 327     clib_bihash_add_del_24_8(&table->ip6_hash, &kv, 1);
 328
 329     if (0 == table->dst_address_length_refcounts[len]++)
 330     {
 331         table->non_empty_dst_address_length_bitmap =
 332             clib_bitmap_set (table->non_empty_dst_address_length_bitmap,
 333                              128 - len, 1);
 334         compute_prefix_lengths_in_search_order (table);
 335     }
 336 }
 337
 338 u32 ip6_fib_table_fwding_lookup_with_if_index (ip6_main_t * im,
 339                                                u32 sw_if_index,
 340                                                const ip6_address_t * dst)
 341 {
 342     u32 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
 343     return ip6_fib_table_fwding_lookup(fib_index, dst);
 344 }
 345
 346 u32
 347 ip6_fib_table_get_index_for_sw_if_index (u32 sw_if_index)
 348 {
 349     if (sw_if_index >= vec_len(ip6_main.fib_index_by_sw_if_index))
 350     {
 351         /*
 352          * This is the case for interfaces that are not yet mapped to
 353          * a IP table
 354          */
 355         return (~0);
 356     }
 357     return (ip6_main.fib_index_by_sw_if_index[sw_if_index]);
 358 }
 359
 360 void
 361 ip6_fib_table_fwding_dpo_update (u32 fib_index,
 362                                  const ip6_address_t *addr,
 363                                  u32 len,
 364                                  const dpo_id_t *dpo)
 365 {
 366     ip6_fib_table_instance_t *table;
 367     clib_bihash_kv_24_8_t kv;
 368     ip6_address_t *mask;
 369     u64 fib;
 370
 371     table = &ip6_main.ip6_table[IP6_FIB_TABLE_FWDING];
 372     mask = &ip6_main.fib_masks[len];
 373     fib = ((u64)((fib_index))<<32);
 374
 375     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 376     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 377     kv.key[2] = fib | len;
 378     kv.value = dpo->dpoi_index;
 379
 380     clib_bihash_add_del_24_8(&table->ip6_hash, &kv, 1);
 381
 382     if (0 == table->dst_address_length_refcounts[len]++)
 383     {
 384         table->non_empty_dst_address_length_bitmap =
 385             clib_bitmap_set (table->non_empty_dst_address_length_bitmap,
 386                              128 - len, 1);
 387         compute_prefix_lengths_in_search_order (table);
 388     }
 389 }
 390
 391 void
 392 ip6_fib_table_fwding_dpo_remove (u32 fib_index,
 393                                  const ip6_address_t *addr,
 394                                  u32 len,
 395                                  const dpo_id_t *dpo)
 396 {
 397     ip6_fib_table_instance_t *table;
 398     clib_bihash_kv_24_8_t kv;
 399     ip6_address_t *mask;
 400     u64 fib;
 401
 402     table = &ip6_main.ip6_table[IP6_FIB_TABLE_FWDING];
 403     mask = &ip6_main.fib_masks[len];
 404     fib = ((u64)((fib_index))<<32);
 405
 406     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 407     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 408     kv.key[2] = fib | len;
 409     kv.value = dpo->dpoi_index;
 410
 411     clib_bihash_add_del_24_8(&table->ip6_hash, &kv, 0);
 412
 413     /* refcount accounting */
 414     ASSERT (table->dst_address_length_refcounts[len] > 0);
 415     if (--table->dst_address_length_refcounts[len] == 0)
 416     {
 417         table->non_empty_dst_address_length_bitmap =
 418             clib_bitmap_set (table->non_empty_dst_address_length_bitmap,
 419                              128 - len, 0);
 420         compute_prefix_lengths_in_search_order (table);
 421     }
 422 }
 423
 424 /**
 425  * @brief Context when walking the IPv6 table. Since all VRFs are in the
 426  * same hash table, we need to filter only those we need as we walk
 427  */
 428 typedef struct ip6_fib_walk_ctx_t_
 429 {
 430     u32 i6w_fib_index;
 431     fib_table_walk_fn_t i6w_fn;
 432     void *i6w_ctx;
 433     fib_prefix_t i6w_root;
 434     fib_prefix_t *i6w_sub_trees;
 435 } ip6_fib_walk_ctx_t;
 436
 437 static int
 438 ip6_fib_walk_cb (clib_bihash_kv_24_8_t * kvp,
 439                  void *arg)
 440 {
 441     ip6_fib_walk_ctx_t *ctx = arg;
 442     ip6_address_t key;
 443
 444     if ((kvp->key[2] >> 32) == ctx->i6w_fib_index)
 445     {
 446         key.as_u64[0] = kvp->key[0];
 447         key.as_u64[1] = kvp->key[1];
 448
 449         if (ip6_destination_matches_route(&ip6_main,
 450                                           &key,
 451                                           &ctx->i6w_root.fp_addr.ip6,
 452                                           ctx->i6w_root.fp_len))
 453         {
 454             const fib_prefix_t *sub_tree;
 455             int skip = 0;
 456
 457             /*
 458              * exclude sub-trees the walk does not want to explore
 459              */
 460             vec_foreach(sub_tree, ctx->i6w_sub_trees)
 461             {
 462                 if (ip6_destination_matches_route(&ip6_main,
 463                                                   &key,
 464                                                   &sub_tree->fp_addr.ip6,
 465                                                   sub_tree->fp_len))
 466                 {
 467                     skip = 1;
 468                     break;
 469                 }
 470             }
 471
 472             if (!skip)
 473             {
 474                 switch (ctx->i6w_fn(kvp->value, ctx->i6w_ctx))
 475                 {
 476                 case FIB_TABLE_WALK_CONTINUE:
 477                     break;
 478                 case FIB_TABLE_WALK_SUB_TREE_STOP: {
 479                     fib_prefix_t pfx = {
 480                         .fp_proto = FIB_PROTOCOL_IP6,
 481                         .fp_len = kvp->key[2] & 0xffffffff,
 482                         .fp_addr.ip6 = key,
 483                     };
 484                     vec_add1(ctx->i6w_sub_trees, pfx);
 485                     break;
 486                 }
 487                 case FIB_TABLE_WALK_STOP:
 488                     goto done;
 489                 }
 490             }
 491         }
 492     }
 493 done:
 494
 495     return (1);
 496 }
 497
 498 void
 499 ip6_fib_table_walk (u32 fib_index,
 500                     fib_table_walk_fn_t fn,
 501                     void *arg)
 502 {
 503     ip6_fib_walk_ctx_t ctx = {
 504         .i6w_fib_index = fib_index,
 505         .i6w_fn = fn,
 506         .i6w_ctx = arg,
 507         .i6w_root = {
 508             .fp_proto = FIB_PROTOCOL_IP6,
 509         },
 510         .i6w_sub_trees = NULL,
 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     vec_free(ctx.i6w_sub_trees);
 519 }
 520
 521 void
 522 ip6_fib_table_sub_tree_walk (u32 fib_index,
 523                              const fib_prefix_t *root,
 524                              fib_table_walk_fn_t fn,
 525                              void *arg)
 526 {
 527     ip6_fib_walk_ctx_t ctx = {
 528         .i6w_fib_index = fib_index,
 529         .i6w_fn = fn,
 530         .i6w_ctx = arg,
 531         .i6w_root = *root,
 532     };
 533
 534     clib_bihash_foreach_key_value_pair_24_8(
 535         &ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
 536         ip6_fib_walk_cb,
 537         &ctx);
 538 }
 539
 540 typedef struct ip6_fib_show_ctx_t_ {
 541     fib_node_index_t *entries;
 542 } ip6_fib_show_ctx_t;
 543
 544 static fib_table_walk_rc_t
 545 ip6_fib_table_show_walk (fib_node_index_t fib_entry_index,
 546                          void *arg)
 547 {
 548     ip6_fib_show_ctx_t *ctx = arg;
 549
 550     vec_add1(ctx->entries, fib_entry_index);
 551
 552     return (FIB_TABLE_WALK_CONTINUE);
 553 }
 554
 555 static void
 556 ip6_fib_table_show_all (ip6_fib_t *fib,
 557                         vlib_main_t * vm)
 558 {
 559     fib_node_index_t *fib_entry_index;
 560     ip6_fib_show_ctx_t ctx = {
 561         .entries = NULL,
 562     };
 563
 564     ip6_fib_table_walk(fib->index, ip6_fib_table_show_walk, &ctx);
 565     vec_sort_with_function(ctx.entries, fib_entry_cmp_for_sort);
 566
 567     vec_foreach(fib_entry_index, ctx.entries)
 568     {
 569         vlib_cli_output(vm, "%U",
 570                         format_fib_entry,
 571                         *fib_entry_index,
 572                         FIB_ENTRY_FORMAT_BRIEF);
 573     }
 574
 575     vec_free(ctx.entries);
 576 }
 577
 578 static void
 579 ip6_fib_table_show_one (ip6_fib_t *fib,
 580                         vlib_main_t * vm,
 581                         ip6_address_t *address,
 582                         u32 mask_len,
 583                         int detail)
 584 {
 585     vlib_cli_output(vm, "%U",
 586                     format_fib_entry,
 587                     ip6_fib_table_lookup(fib->index, address, mask_len),
 588                     (detail ?
 589                      FIB_ENTRY_FORMAT_DETAIL2:
 590                      FIB_ENTRY_FORMAT_DETAIL));
 591 }
 592
 593 u8 *
 594 format_ip6_fib_table_memory (u8 * s, va_list * args)
 595 {
 596     uword bytes_inuse;
 597
 598     bytes_inuse = (alloc_arena_next(&(ip6_main.ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash)) +
 599                    alloc_arena_next(&(ip6_main.ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash)));
 600
 601     s = format(s, "%=30s %=6d %=12ld\n",
 602                "IPv6 unicast",
 603                pool_elts(ip6_main.fibs),
 604                bytes_inuse);
 605     return (s);
 606 }
 607
 608 typedef struct {
 609   u32 fib_index;
 610   u64 count_by_prefix_length[129];
 611 } count_routes_in_fib_at_prefix_length_arg_t;
 612
 613 static int
 614 count_routes_in_fib_at_prefix_length (clib_bihash_kv_24_8_t * kvp,
 615                                       void *arg)
 616 {
 617   count_routes_in_fib_at_prefix_length_arg_t * ap = arg;
 618   int mask_width;
 619
 620   if ((kvp->key[2]>>32) != ap->fib_index)
 621       return (BIHASH_WALK_CONTINUE);
 622
 623   mask_width = kvp->key[2] & 0xFF;
 624
 625   ap->count_by_prefix_length[mask_width]++;
 626
 627   return (BIHASH_WALK_CONTINUE);
 628 }
 629
 630 static clib_error_t *
 631 ip6_show_fib (vlib_main_t * vm,
 632               unformat_input_t * input,
 633               vlib_cli_command_t * cmd)
 634 {
 635     count_routes_in_fib_at_prefix_length_arg_t _ca, *ca = &_ca;
 636     ip6_main_t * im6 = &ip6_main;
 637     fib_table_t *fib_table;
 638     ip6_fib_t * fib;
 639     int verbose, matching;
 640     ip6_address_t matching_address;
 641     u32 mask_len  = 128;
 642     int table_id = -1, fib_index = ~0;
 643     int detail = 0;
 644     int hash = 0;
 645
 646     verbose = 1;
 647     matching = 0;
 648
 649     while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
 650     {
 651         if (unformat (input, "brief")   ||
 652             unformat (input, "summary") ||
 653             unformat (input, "sum"))
 654             verbose = 0;
 655
 656         else if (unformat (input, "detail")   ||
 657                  unformat (input, "det"))
 658             detail = 1;
 659
 660         else if (unformat (input, "hash") ||
 661                  unformat (input, "mem") ||
 662                  unformat (input, "memory"))
 663             hash = 1;
 664
 665         else if (unformat (input, "%U/%d",
 666                            unformat_ip6_address, &matching_address, &mask_len))
 667             matching = 1;
 668
 669         else if (unformat (input, "%U", unformat_ip6_address, &matching_address))
 670             matching = 1;
 671
 672         else if (unformat (input, "table %d", &table_id))
 673             ;
 674         else if (unformat (input, "index %d", &fib_index))
 675             ;
 676         else
 677             break;
 678     }
 679
 680     if (hash)
 681     {
 682         vlib_cli_output (vm, "IPv6 Non-Forwarding Hash Table:\n%U\n",
 683                          BV (format_bihash),
 684                          &im6->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
 685                          detail);
 686         vlib_cli_output (vm, "IPv6 Forwarding Hash Table:\n%U\n",
 687                          BV (format_bihash),
 688                          &im6->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash,
 689                          detail);
 690         return (NULL);
 691     }
 692
 693     pool_foreach (fib_table, im6->fibs,
 694     ({
 695         fib_source_t source;
 696         u8 *s = NULL;
 697
 698         fib = pool_elt_at_index(im6->v6_fibs, fib_table->ft_index);
 699         if (table_id >= 0 && table_id != (int)fib->table_id)
 700             continue;
 701         if (fib_index != ~0 && fib_index != (int)fib->index)
 702             continue;
 703         if (fib_table->ft_flags & FIB_TABLE_FLAG_IP6_LL)
 704             continue;
 705
 706         s = format(s, "%U, fib_index:%d, flow hash:[%U] epoch:%d flags:%U locks:[",
 707                    format_fib_table_name, fib->index,
 708                    FIB_PROTOCOL_IP6,
 709                    fib->index,
 710                    format_ip_flow_hash_config,
 711                    fib_table->ft_flow_hash_config,
 712                    fib_table->ft_epoch,
 713                    format_fib_table_flags, fib_table->ft_flags);
 714
 715         vec_foreach_index(source, fib_table->ft_locks)
 716         {
 717             if (0 != fib_table->ft_locks[source])
 718             {
 719                 s = format(s, "%U:%d, ",
 720                            format_fib_source, source,
 721                            fib_table->ft_locks[source]);
 722             }
 723         }
 724         s = format (s, "]");
 725         vlib_cli_output (vm, "%v", s);
 726         vec_free(s);
 727
 728         /* Show summary? */
 729         if (! verbose)
 730         {
 731             clib_bihash_24_8_t * h = &im6->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash;
 732             int len;
 733
 734             vlib_cli_output (vm, "%=20s%=16s", "Prefix length", "Count");
 735
 736             clib_memset (ca, 0, sizeof(*ca));
 737             ca->fib_index = fib->index;
 738
 739             clib_bihash_foreach_key_value_pair_24_8
 740                 (h, count_routes_in_fib_at_prefix_length, ca);
 741
 742             for (len = 128; len >= 0; len--)
 743             {
 744                 if (ca->count_by_prefix_length[len])
 745                     vlib_cli_output (vm, "%=20d%=16lld",
 746                                      len, ca->count_by_prefix_length[len]);
 747             }
 748             continue;
 749         }
 750
 751         if (!matching)
 752         {
 753             ip6_fib_table_show_all(fib, vm);
 754         }
 755         else
 756         {
 757             ip6_fib_table_show_one(fib, vm, &matching_address, mask_len, detail);
 758         }
 759     }));
 760
 761     return 0;
 762 }
 763
 764 /*?
 765  * This command displays the IPv6 FIB Tables (VRF Tables) and the route
 766  * entries for each table.
 767  *
 768  * @note This command will run for a long time when the FIB tables are
 769  * comprised of millions of entries. For those senarios, consider displaying
 770  * in summary mode.
 771  *
 772  * @cliexpar
 773  * @parblock
 774  * Example of how to display all the IPv6 FIB tables:
 775  * @cliexstart{show ip6 fib}
 776  * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
 777  * @::/0
 778  *   unicast-ip6-chain
 779  *   [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
 780  *     [0] [@0]: dpo-drop ip6
 781  * fe80::/10
 782  *   unicast-ip6-chain
 783  *   [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
 784  *     [0] [@2]: dpo-receive
 785  * ff02::1/128
 786  *   unicast-ip6-chain
 787  *   [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
 788  *     [0] [@2]: dpo-receive
 789  * ff02::2/128
 790  *   unicast-ip6-chain
 791  *   [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
 792  *     [0] [@2]: dpo-receive
 793  * ff02::16/128
 794  *   unicast-ip6-chain
 795  *   [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
 796  *     [0] [@2]: dpo-receive
 797  * ff02::1:ff00:0/104
 798  *   unicast-ip6-chain
 799  *   [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
 800  *     [0] [@2]: dpo-receive
 801  * ipv6-VRF:8, fib_index 1, flow hash: src dst sport dport proto
 802  * @::/0
 803  *   unicast-ip6-chain
 804  *   [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
 805  *     [0] [@0]: dpo-drop ip6
 806  * @::a:1:1:0:4/126
 807  *   unicast-ip6-chain
 808  *   [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
 809  *     [0] [@4]: ipv6-glean: af_packet0
 810  * @::a:1:1:0:7/128
 811  *   unicast-ip6-chain
 812  *   [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
 813  *     [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
 814  * fe80::/10
 815  *   unicast-ip6-chain
 816  *   [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
 817  *     [0] [@2]: dpo-receive
 818  * fe80::fe:3eff:fe3e:9222/128
 819  *   unicast-ip6-chain
 820  *   [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
 821  *     [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
 822  * ff02::1/128
 823  *   unicast-ip6-chain
 824  *   [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
 825  *     [0] [@2]: dpo-receive
 826  * ff02::2/128
 827  *   unicast-ip6-chain
 828  *   [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
 829  *     [0] [@2]: dpo-receive
 830  * ff02::16/128
 831  *   unicast-ip6-chain
 832  *   [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
 833  *     [0] [@2]: dpo-receive
 834  * ff02::1:ff00:0/104
 835  *   unicast-ip6-chain
 836  *   [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
 837  *     [0] [@2]: dpo-receive
 838  * @cliexend
 839  *
 840  * Example of how to display a summary of all IPv6 FIB tables:
 841  * @cliexstart{show ip6 fib summary}
 842  * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
 843  *     Prefix length         Count
 844  *          128                3
 845  *          104                1
 846  *          10                 1
 847  *           0                 1
 848  * ipv6-VRF:8, fib_index 1, flow hash: src dst sport dport proto
 849  *     Prefix length         Count
 850  *          128                5
 851  *          126                1
 852  *          104                1
 853  *          10                 1
 854  *           0                 1
 855  * @cliexend
 856  * @endparblock
 857  ?*/
 858 /* *INDENT-OFF* */
 859 VLIB_CLI_COMMAND (ip6_show_fib_command, static) = {
 860     .path = "show ip6 fib",
 861     .short_help = "show ip6 fib [summary] [table <table-id>] [index <fib-id>] [<ip6-addr>[/<width>]] [detail]",
 862     .function = ip6_show_fib,
 863 };
 864 /* *INDENT-ON* */