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 ip6_fib_table_instance_t ip6_fib_table[IP6_FIB_NUM_TABLES];
  24
  25 /* ip6 lookup table config parameters */
  26 u32 ip6_fib_table_nbuckets;
  27 uword ip6_fib_table_size;
  28
  29 static void
  30 vnet_ip6_fib_init (u32 fib_index)
  31 {
  32     fib_prefix_t pfx = {
  33         .fp_proto = FIB_PROTOCOL_IP6,
  34         .fp_len = 0,
  35         .fp_addr = {
  36             .ip6 = {
  37                 { 0, 0, },
  38             },
  39         }
  40     };
  41
  42     /*
  43      * Add the default route.
  44      */
  45     fib_table_entry_special_add(fib_index,
  46                                 &pfx,
  47                                 FIB_SOURCE_DEFAULT_ROUTE,
  48                                 FIB_ENTRY_FLAG_DROP);
  49
  50     /*
  51      * all link local via the link local lookup DPO
  52      */
  53     pfx.fp_addr.ip6.as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
  54     pfx.fp_addr.ip6.as_u64[1] = 0;
  55     pfx.fp_len = 10;
  56     fib_table_entry_special_dpo_add(fib_index,
  57                                     &pfx,
  58                                     FIB_SOURCE_SPECIAL,
  59                                     FIB_ENTRY_FLAG_NONE,
  60                                     ip6_ll_dpo_get());
  61 }
  62
  63 static u32
  64 create_fib_with_table_id (u32 table_id,
  65                           fib_source_t src,
  66                           fib_table_flags_t flags,
  67                           u8 *desc)
  68 {
  69     fib_table_t *fib_table;
  70     ip6_fib_t *v6_fib;
  71
  72     pool_get(ip6_main.fibs, fib_table);
  73     pool_get_aligned(ip6_main.v6_fibs, v6_fib, CLIB_CACHE_LINE_BYTES);
  74
  75     clib_memset(fib_table, 0, sizeof(*fib_table));
  76     clib_memset(v6_fib, 0, sizeof(*v6_fib));
  77
  78     ASSERT((fib_table - ip6_main.fibs) ==
  79            (v6_fib - ip6_main.v6_fibs));
  80
  81     fib_table->ft_proto = FIB_PROTOCOL_IP6;
  82     fib_table->ft_index =
  83             v6_fib->index =
  84                 (fib_table - ip6_main.fibs);
  85
  86     hash_set(ip6_main.fib_index_by_table_id, table_id, fib_table->ft_index);
  87
  88     fib_table->ft_table_id =
  89         v6_fib->table_id =
  90             table_id;
  91     fib_table->ft_flow_hash_config = IP_FLOW_HASH_DEFAULT;
  92     fib_table->ft_flags = flags;
  93     fib_table->ft_desc = desc;
  94
  95     vnet_ip6_fib_init(fib_table->ft_index);
  96     fib_table_lock(fib_table->ft_index, FIB_PROTOCOL_IP6, src);
  97
  98     return (fib_table->ft_index);
  99 }
 100
 101 u32
 102 ip6_fib_table_find_or_create_and_lock (u32 table_id,
 103                                        fib_source_t src)
 104 {
 105     uword * p;
 106
 107     p = hash_get (ip6_main.fib_index_by_table_id, table_id);
 108     if (NULL == p)
 109         return create_fib_with_table_id(table_id, src,
 110                                         FIB_TABLE_FLAG_NONE,
 111                                         NULL);
 112
 113     fib_table_lock(p[0], FIB_PROTOCOL_IP6, src);
 114
 115     return (p[0]);
 116 }
 117
 118 u32
 119 ip6_fib_table_create_and_lock (fib_source_t src,
 120                                fib_table_flags_t flags,
 121                                u8 *desc)
 122 {
 123     return (create_fib_with_table_id(~0, src, flags, desc));
 124 }
 125
 126 void
 127 ip6_fib_table_destroy (u32 fib_index)
 128 {
 129     /*
 130      * all link local first ...
 131      */
 132     fib_prefix_t pfx = {
 133         .fp_proto = FIB_PROTOCOL_IP6,
 134         .fp_len = 10,
 135         .fp_addr = {
 136             .ip6 = {
 137                 .as_u8 = {
 138                     [0] = 0xFE,
 139                     [1] = 0x80,
 140                 },
 141             },
 142         }
 143     };
 144     fib_table_entry_delete(fib_index,
 145                            &pfx,
 146                            FIB_SOURCE_SPECIAL);
 147
 148     /*
 149      * ... then the default route.
 150      */
 151     pfx.fp_addr.ip6.as_u64[0] = 0;
 152     pfx.fp_len = 00;
 153     fib_table_entry_special_remove(fib_index,
 154                                    &pfx,
 155                                    FIB_SOURCE_DEFAULT_ROUTE);
 156
 157     fib_table_t *fib_table = fib_table_get(fib_index, FIB_PROTOCOL_IP6);
 158     fib_source_t source;
 159
 160     /*
 161      * validate no more routes.
 162      */
 163 #if CLIB_DEBUG > 0
 164     if (0 != fib_table->ft_total_route_counts)
 165         fib_table_assert_empty(fib_table);
 166 #endif
 167
 168     vec_foreach_index(source, fib_table->ft_src_route_counts)
 169     {
 170         ASSERT(0 == fib_table->ft_src_route_counts[source]);
 171     }
 172
 173     if (~0 != fib_table->ft_table_id)
 174     {
 175         hash_unset (ip6_main.fib_index_by_table_id, fib_table->ft_table_id);
 176     }
 177     vec_free (fib_table->ft_locks);
 178     vec_free(fib_table->ft_src_route_counts);
 179     pool_put_index(ip6_main.v6_fibs, fib_table->ft_index);
 180     pool_put(ip6_main.fibs, fib_table);
 181 }
 182
 183 fib_node_index_t
 184 ip6_fib_table_lookup (u32 fib_index,
 185                       const ip6_address_t *addr,
 186                       u32 len)
 187 {
 188     ip6_fib_table_instance_t *table;
 189     clib_bihash_kv_24_8_t kv, value;
 190     int i, n_p, rv;
 191     u64 fib;
 192
 193     table = &ip6_fib_table[IP6_FIB_TABLE_NON_FWDING];
 194     n_p = vec_len (table->prefix_lengths_in_search_order);
 195
 196     kv.key[0] = addr->as_u64[0];
 197     kv.key[1] = addr->as_u64[1];
 198     fib = ((u64)((fib_index))<<32);
 199
 200     /*
 201      * start search from a mask length same length or shorter.
 202      * we don't want matches longer than the mask passed
 203      */
 204     i = 0;
 205     while (i < n_p && table->prefix_lengths_in_search_order[i] > len)
 206     {
 207         i++;
 208     }
 209
 210     for (; i < n_p; i++)
 211     {
 212         int dst_address_length = table->prefix_lengths_in_search_order[i];
 213         ip6_address_t * mask = &ip6_main.fib_masks[dst_address_length];
 214
 215         ASSERT(dst_address_length >= 0 && dst_address_length <= 128);
 216         //As lengths are decreasing, masks are increasingly specific.
 217         kv.key[0] &= mask->as_u64[0];
 218         kv.key[1] &= mask->as_u64[1];
 219         kv.key[2] = fib | dst_address_length;
 220
 221         rv = clib_bihash_search_inline_2_24_8(&table->ip6_hash, &kv, &value);
 222         if (rv == 0)
 223             return value.value;
 224     }
 225
 226     return (FIB_NODE_INDEX_INVALID);
 227 }
 228
 229 fib_node_index_t
 230 ip6_fib_table_lookup_exact_match (u32 fib_index,
 231                                   const ip6_address_t *addr,
 232                                   u32 len)
 233 {
 234     ip6_fib_table_instance_t *table;
 235     clib_bihash_kv_24_8_t kv, value;
 236     ip6_address_t *mask;
 237     u64 fib;
 238     int rv;
 239
 240     table = &ip6_fib_table[IP6_FIB_TABLE_NON_FWDING];
 241     mask = &ip6_main.fib_masks[len];
 242     fib = ((u64)((fib_index))<<32);
 243
 244     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 245     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 246     kv.key[2] = fib | len;
 247
 248     rv = clib_bihash_search_inline_2_24_8(&table->ip6_hash, &kv, &value);
 249     if (rv == 0)
 250         return value.value;
 251
 252     return (FIB_NODE_INDEX_INVALID);
 253 }
 254
 255 static void
 256 compute_prefix_lengths_in_search_order (ip6_fib_table_instance_t *table)
 257 {
 258     u8 *old, *prefix_lengths_in_search_order = NULL;
 259     int i;
 260
 261     /*
 262      * build the list in a scratch space then cutover so the workers
 263      * can continue uninterrupted.
 264      */
 265     old = table->prefix_lengths_in_search_order;
 266
 267     /* Note: bitmap reversed so this is in fact a longest prefix match */
 268     clib_bitmap_foreach (i, table->non_empty_dst_address_length_bitmap)
 269      {
 270         int dst_address_length = 128 - i;
 271         vec_add1(prefix_lengths_in_search_order, dst_address_length);
 272     }
 273
 274     table->prefix_lengths_in_search_order = prefix_lengths_in_search_order;
 275
 276     /*
 277      * let the workers go once round the track before we free the old set
 278      */
 279     vlib_worker_wait_one_loop();
 280     vec_free(old);
 281 }
 282
 283 void
 284 ip6_fib_table_entry_remove (u32 fib_index,
 285                             const ip6_address_t *addr,
 286                             u32 len)
 287 {
 288     ip6_fib_table_instance_t *table;
 289     clib_bihash_kv_24_8_t kv;
 290     ip6_address_t *mask;
 291     u64 fib;
 292
 293     table = &ip6_fib_table[IP6_FIB_TABLE_NON_FWDING];
 294     mask = &ip6_main.fib_masks[len];
 295     fib = ((u64)((fib_index))<<32);
 296
 297     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 298     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 299     kv.key[2] = fib | len;
 300
 301     clib_bihash_add_del_24_8(&table->ip6_hash, &kv, 0);
 302
 303     /* refcount accounting */
 304     ASSERT (table->dst_address_length_refcounts[len] > 0);
 305     if (--table->dst_address_length_refcounts[len] == 0)
 306     {
 307         table->non_empty_dst_address_length_bitmap =
 308             clib_bitmap_set (table->non_empty_dst_address_length_bitmap,
 309                              128 - len, 0);
 310         compute_prefix_lengths_in_search_order (table);
 311     }
 312 }
 313
 314 void
 315 ip6_fib_table_entry_insert (u32 fib_index,
 316                             const ip6_address_t *addr,
 317                             u32 len,
 318                             fib_node_index_t fib_entry_index)
 319 {
 320     ip6_fib_table_instance_t *table;
 321     clib_bihash_kv_24_8_t kv;
 322     ip6_address_t *mask;
 323     u64 fib;
 324
 325     table = &ip6_fib_table[IP6_FIB_TABLE_NON_FWDING];
 326     mask = &ip6_main.fib_masks[len];
 327     fib = ((u64)((fib_index))<<32);
 328
 329     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 330     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 331     kv.key[2] = fib | len;
 332     kv.value = fib_entry_index;
 333
 334     clib_bihash_add_del_24_8(&table->ip6_hash, &kv, 1);
 335
 336     if (0 == table->dst_address_length_refcounts[len]++)
 337     {
 338         table->non_empty_dst_address_length_bitmap =
 339             clib_bitmap_set (table->non_empty_dst_address_length_bitmap,
 340                              128 - len, 1);
 341         compute_prefix_lengths_in_search_order (table);
 342     }
 343 }
 344
 345 u32 ip6_fib_table_fwding_lookup_with_if_index (ip6_main_t * im,
 346                                                u32 sw_if_index,
 347                                                const ip6_address_t * dst)
 348 {
 349     u32 fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
 350     return ip6_fib_table_fwding_lookup(fib_index, dst);
 351 }
 352
 353 u32
 354 ip6_fib_table_get_index_for_sw_if_index (u32 sw_if_index)
 355 {
 356     if (sw_if_index >= vec_len(ip6_main.fib_index_by_sw_if_index))
 357     {
 358         /*
 359          * This is the case for interfaces that are not yet mapped to
 360          * a IP table
 361          */
 362         return (~0);
 363     }
 364     return (ip6_main.fib_index_by_sw_if_index[sw_if_index]);
 365 }
 366
 367 void
 368 ip6_fib_table_fwding_dpo_update (u32 fib_index,
 369                                  const ip6_address_t *addr,
 370                                  u32 len,
 371                                  const dpo_id_t *dpo)
 372 {
 373     ip6_fib_table_instance_t *table;
 374     clib_bihash_kv_24_8_t kv;
 375     ip6_address_t *mask;
 376     u64 fib;
 377
 378     table = &ip6_fib_table[IP6_FIB_TABLE_FWDING];
 379     mask = &ip6_main.fib_masks[len];
 380     fib = ((u64)((fib_index))<<32);
 381
 382     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 383     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 384     kv.key[2] = fib | len;
 385     kv.value = dpo->dpoi_index;
 386
 387     clib_bihash_add_del_24_8(&table->ip6_hash, &kv, 1);
 388
 389     if (0 == table->dst_address_length_refcounts[len]++)
 390     {
 391         table->non_empty_dst_address_length_bitmap =
 392             clib_bitmap_set (table->non_empty_dst_address_length_bitmap,
 393                              128 - len, 1);
 394         compute_prefix_lengths_in_search_order (table);
 395     }
 396 }
 397
 398 void
 399 ip6_fib_table_fwding_dpo_remove (u32 fib_index,
 400                                  const ip6_address_t *addr,
 401                                  u32 len,
 402                                  const dpo_id_t *dpo)
 403 {
 404     ip6_fib_table_instance_t *table;
 405     clib_bihash_kv_24_8_t kv;
 406     ip6_address_t *mask;
 407     u64 fib;
 408
 409     table = &ip6_fib_table[IP6_FIB_TABLE_FWDING];
 410     mask = &ip6_main.fib_masks[len];
 411     fib = ((u64)((fib_index))<<32);
 412
 413     kv.key[0] = addr->as_u64[0] & mask->as_u64[0];
 414     kv.key[1] = addr->as_u64[1] & mask->as_u64[1];
 415     kv.key[2] = fib | len;
 416     kv.value = dpo->dpoi_index;
 417
 418     clib_bihash_add_del_24_8(&table->ip6_hash, &kv, 0);
 419
 420     /* refcount accounting */
 421     ASSERT (table->dst_address_length_refcounts[len] > 0);
 422     if (--table->dst_address_length_refcounts[len] == 0)
 423     {
 424         table->non_empty_dst_address_length_bitmap =
 425             clib_bitmap_set (table->non_empty_dst_address_length_bitmap,
 426                              128 - len, 0);
 427         compute_prefix_lengths_in_search_order (table);
 428     }
 429 }
 430
 431 /**
 432  * @brief Context when walking the IPv6 table. Since all VRFs are in the
 433  * same hash table, we need to filter only those we need as we walk
 434  */
 435 typedef struct ip6_fib_walk_ctx_t_
 436 {
 437     u32 i6w_fib_index;
 438     fib_table_walk_fn_t i6w_fn;
 439     void *i6w_ctx;
 440     fib_prefix_t i6w_root;
 441     fib_prefix_t *i6w_sub_trees;
 442 } ip6_fib_walk_ctx_t;
 443
 444 static int
 445 ip6_fib_walk_cb (clib_bihash_kv_24_8_t * kvp,
 446                  void *arg)
 447 {
 448     ip6_fib_walk_ctx_t *ctx = arg;
 449     ip6_address_t key;
 450
 451     if ((kvp->key[2] >> 32) == ctx->i6w_fib_index)
 452     {
 453         key.as_u64[0] = kvp->key[0];
 454         key.as_u64[1] = kvp->key[1];
 455
 456         if (ip6_destination_matches_route(&ip6_main,
 457                                           &key,
 458                                           &ctx->i6w_root.fp_addr.ip6,
 459                                           ctx->i6w_root.fp_len))
 460         {
 461             const fib_prefix_t *sub_tree;
 462             int skip = 0;
 463
 464             /*
 465              * exclude sub-trees the walk does not want to explore
 466              */
 467             vec_foreach(sub_tree, ctx->i6w_sub_trees)
 468             {
 469                 if (ip6_destination_matches_route(&ip6_main,
 470                                                   &key,
 471                                                   &sub_tree->fp_addr.ip6,
 472                                                   sub_tree->fp_len))
 473                 {
 474                     skip = 1;
 475                     break;
 476                 }
 477             }
 478
 479             if (!skip)
 480             {
 481                 switch (ctx->i6w_fn(kvp->value, ctx->i6w_ctx))
 482                 {
 483                 case FIB_TABLE_WALK_CONTINUE:
 484                     break;
 485                 case FIB_TABLE_WALK_SUB_TREE_STOP: {
 486                     fib_prefix_t pfx = {
 487                         .fp_proto = FIB_PROTOCOL_IP6,
 488                         .fp_len = kvp->key[2] & 0xffffffff,
 489                         .fp_addr.ip6 = key,
 490                     };
 491                     vec_add1(ctx->i6w_sub_trees, pfx);
 492                     break;
 493                 }
 494                 case FIB_TABLE_WALK_STOP:
 495                     goto done;
 496                 }
 497             }
 498         }
 499     }
 500 done:
 501
 502     return (1);
 503 }
 504
 505 void
 506 ip6_fib_table_walk (u32 fib_index,
 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 = {
 515             .fp_proto = FIB_PROTOCOL_IP6,
 516         },
 517         .i6w_sub_trees = NULL,
 518     };
 519
 520     clib_bihash_foreach_key_value_pair_24_8(
 521         &ip6_fib_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
 522         ip6_fib_walk_cb,
 523         &ctx);
 524
 525     vec_free(ctx.i6w_sub_trees);
 526 }
 527
 528 void
 529 ip6_fib_table_sub_tree_walk (u32 fib_index,
 530                              const fib_prefix_t *root,
 531                              fib_table_walk_fn_t fn,
 532                              void *arg)
 533 {
 534     ip6_fib_walk_ctx_t ctx = {
 535         .i6w_fib_index = fib_index,
 536         .i6w_fn = fn,
 537         .i6w_ctx = arg,
 538         .i6w_root = *root,
 539     };
 540
 541     clib_bihash_foreach_key_value_pair_24_8(
 542         &ip6_fib_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
 543         ip6_fib_walk_cb,
 544         &ctx);
 545 }
 546
 547 typedef struct ip6_fib_show_ctx_t_ {
 548     fib_node_index_t *entries;
 549 } ip6_fib_show_ctx_t;
 550
 551 static fib_table_walk_rc_t
 552 ip6_fib_table_show_walk (fib_node_index_t fib_entry_index,
 553                          void *arg)
 554 {
 555     ip6_fib_show_ctx_t *ctx = arg;
 556
 557     vec_add1(ctx->entries, fib_entry_index);
 558
 559     return (FIB_TABLE_WALK_CONTINUE);
 560 }
 561
 562 static void
 563 ip6_fib_table_show_all (ip6_fib_t *fib,
 564                         vlib_main_t * vm)
 565 {
 566     fib_node_index_t *fib_entry_index;
 567     ip6_fib_show_ctx_t ctx = {
 568         .entries = NULL,
 569     };
 570
 571     ip6_fib_table_walk(fib->index, ip6_fib_table_show_walk, &ctx);
 572     vec_sort_with_function(ctx.entries, fib_entry_cmp_for_sort);
 573
 574     vec_foreach(fib_entry_index, ctx.entries)
 575     {
 576         vlib_cli_output(vm, "%U",
 577                         format_fib_entry,
 578                         *fib_entry_index,
 579                         FIB_ENTRY_FORMAT_BRIEF);
 580     }
 581
 582     vec_free(ctx.entries);
 583 }
 584
 585 static void
 586 ip6_fib_table_show_one (ip6_fib_t *fib,
 587                         vlib_main_t * vm,
 588                         ip6_address_t *address,
 589                         u32 mask_len,
 590                         int detail)
 591 {
 592     vlib_cli_output(vm, "%U",
 593                     format_fib_entry,
 594                     ip6_fib_table_lookup(fib->index, address, mask_len),
 595                     (detail ?
 596                      FIB_ENTRY_FORMAT_DETAIL2:
 597                      FIB_ENTRY_FORMAT_DETAIL));
 598 }
 599
 600 u8 *
 601 format_ip6_fib_table_memory (u8 * s, va_list * args)
 602 {
 603     uword bytes_inuse;
 604
 605     bytes_inuse = (alloc_arena_next(&(ip6_fib_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash)) +
 606                    alloc_arena_next(&(ip6_fib_table[IP6_FIB_TABLE_FWDING].ip6_hash)));
 607
 608     s = format(s, "%=30s %=6d %=12ld\n",
 609                "IPv6 unicast",
 610                pool_elts(ip6_main.fibs),
 611                bytes_inuse);
 612     return (s);
 613 }
 614
 615 typedef struct {
 616   u32 fib_index;
 617   u64 count_by_prefix_length[129];
 618 } count_routes_in_fib_at_prefix_length_arg_t;
 619
 620 static int
 621 count_routes_in_fib_at_prefix_length (clib_bihash_kv_24_8_t * kvp,
 622                                       void *arg)
 623 {
 624   count_routes_in_fib_at_prefix_length_arg_t * ap = arg;
 625   int mask_width;
 626
 627   if ((kvp->key[2]>>32) != ap->fib_index)
 628       return (BIHASH_WALK_CONTINUE);
 629
 630   mask_width = kvp->key[2] & 0xFF;
 631
 632   ap->count_by_prefix_length[mask_width]++;
 633
 634   return (BIHASH_WALK_CONTINUE);
 635 }
 636
 637 static clib_error_t *
 638 ip6_show_fib (vlib_main_t * vm,
 639               unformat_input_t * input,
 640               vlib_cli_command_t * cmd)
 641 {
 642     count_routes_in_fib_at_prefix_length_arg_t _ca, *ca = &_ca;
 643     ip6_main_t * im6 = &ip6_main;
 644     fib_table_t *fib_table;
 645     ip6_fib_t * fib;
 646     int verbose, matching;
 647     ip6_address_t matching_address;
 648     u32 mask_len  = 128;
 649     int table_id = -1, fib_index = ~0;
 650     int detail = 0;
 651     int hash = 0;
 652
 653     verbose = 1;
 654     matching = 0;
 655
 656     while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
 657     {
 658         if (unformat (input, "brief")   ||
 659             unformat (input, "summary") ||
 660             unformat (input, "sum"))
 661             verbose = 0;
 662
 663         else if (unformat (input, "detail")   ||
 664                  unformat (input, "det"))
 665             detail = 1;
 666
 667         else if (unformat (input, "hash") ||
 668                  unformat (input, "mem") ||
 669                  unformat (input, "memory"))
 670             hash = 1;
 671
 672         else if (unformat (input, "%U/%d",
 673                            unformat_ip6_address, &matching_address, &mask_len))
 674             matching = 1;
 675
 676         else if (unformat (input, "%U", unformat_ip6_address, &matching_address))
 677             matching = 1;
 678
 679         else if (unformat (input, "table %d", &table_id))
 680             ;
 681         else if (unformat (input, "index %d", &fib_index))
 682             ;
 683         else
 684             break;
 685     }
 686
 687     if (hash)
 688     {
 689         vlib_cli_output (vm, "IPv6 Non-Forwarding Hash Table:\n%U\n",
 690                          BV (format_bihash),
 691                          &ip6_fib_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
 692                          detail);
 693         vlib_cli_output (vm, "IPv6 Forwarding Hash Table:\n%U\n",
 694                          BV (format_bihash),
 695                          &ip6_fib_table[IP6_FIB_TABLE_FWDING].ip6_hash,
 696                          detail);
 697         return (NULL);
 698     }
 699
 700     pool_foreach (fib_table, im6->fibs)
 701      {
 702         fib_source_t source;
 703         u8 *s = NULL;
 704
 705         fib = pool_elt_at_index(im6->v6_fibs, fib_table->ft_index);
 706         if (table_id >= 0 && table_id != (int)fib->table_id)
 707             continue;
 708         if (fib_index != ~0 && fib_index != (int)fib->index)
 709             continue;
 710         if (fib_table->ft_flags & FIB_TABLE_FLAG_IP6_LL)
 711             continue;
 712
 713         s = format(s, "%U, fib_index:%d, flow hash:[%U] epoch:%d flags:%U locks:[",
 714                    format_fib_table_name, fib->index,
 715                    FIB_PROTOCOL_IP6,
 716                    fib->index,
 717                    format_ip_flow_hash_config,
 718                    fib_table->ft_flow_hash_config,
 719                    fib_table->ft_epoch,
 720                    format_fib_table_flags, fib_table->ft_flags);
 721
 722         vec_foreach_index(source, fib_table->ft_locks)
 723         {
 724             if (0 != fib_table->ft_locks[source])
 725             {
 726                 s = format(s, "%U:%d, ",
 727                            format_fib_source, source,
 728                            fib_table->ft_locks[source]);
 729             }
 730         }
 731         s = format (s, "]");
 732         vlib_cli_output (vm, "%v", s);
 733         vec_free(s);
 734
 735         /* Show summary? */
 736         if (! verbose)
 737         {
 738             clib_bihash_24_8_t * h = &ip6_fib_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash;
 739             int len;
 740
 741             vlib_cli_output (vm, "%=20s%=16s", "Prefix length", "Count");
 742
 743             clib_memset (ca, 0, sizeof(*ca));
 744             ca->fib_index = fib->index;
 745
 746             clib_bihash_foreach_key_value_pair_24_8
 747                 (h, count_routes_in_fib_at_prefix_length, ca);
 748
 749             for (len = 128; len >= 0; len--)
 750             {
 751                 if (ca->count_by_prefix_length[len])
 752                     vlib_cli_output (vm, "%=20d%=16lld",
 753                                      len, ca->count_by_prefix_length[len]);
 754             }
 755             continue;
 756         }
 757
 758         if (!matching)
 759         {
 760             ip6_fib_table_show_all(fib, vm);
 761         }
 762         else
 763         {
 764             ip6_fib_table_show_one(fib, vm, &matching_address, mask_len, detail);
 765         }
 766     }
 767
 768     return 0;
 769 }
 770
 771 /*?
 772  * This command displays the IPv6 FIB Tables (VRF Tables) and the route
 773  * entries for each table.
 774  *
 775  * @note This command will run for a long time when the FIB tables are
 776  * comprised of millions of entries. For those scenarios, consider displaying
 777  * in summary mode.
 778  *
 779  * @cliexpar
 780  * @parblock
 781  * Example of how to display all the IPv6 FIB tables:
 782  * @cliexstart{show ip6 fib}
 783  * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
 784  * @::/0
 785  *   unicast-ip6-chain
 786  *   [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
 787  *     [0] [@0]: dpo-drop ip6
 788  * fe80::/10
 789  *   unicast-ip6-chain
 790  *   [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
 791  *     [0] [@2]: dpo-receive
 792  * ff02::1/128
 793  *   unicast-ip6-chain
 794  *   [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
 795  *     [0] [@2]: dpo-receive
 796  * ff02::2/128
 797  *   unicast-ip6-chain
 798  *   [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
 799  *     [0] [@2]: dpo-receive
 800  * ff02::16/128
 801  *   unicast-ip6-chain
 802  *   [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
 803  *     [0] [@2]: dpo-receive
 804  * ff02::1:ff00:0/104
 805  *   unicast-ip6-chain
 806  *   [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
 807  *     [0] [@2]: dpo-receive
 808  * ipv6-VRF:8, fib_index 1, flow hash: src dst sport dport proto
 809  * @::/0
 810  *   unicast-ip6-chain
 811  *   [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
 812  *     [0] [@0]: dpo-drop ip6
 813  * @::a:1:1:0:4/126
 814  *   unicast-ip6-chain
 815  *   [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
 816  *     [0] [@4]: ipv6-glean: af_packet0
 817  * @::a:1:1:0:7/128
 818  *   unicast-ip6-chain
 819  *   [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
 820  *     [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
 821  * fe80::/10
 822  *   unicast-ip6-chain
 823  *   [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
 824  *     [0] [@2]: dpo-receive
 825  * fe80::fe:3eff:fe3e:9222/128
 826  *   unicast-ip6-chain
 827  *   [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
 828  *     [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
 829  * ff02::1/128
 830  *   unicast-ip6-chain
 831  *   [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
 832  *     [0] [@2]: dpo-receive
 833  * ff02::2/128
 834  *   unicast-ip6-chain
 835  *   [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
 836  *     [0] [@2]: dpo-receive
 837  * ff02::16/128
 838  *   unicast-ip6-chain
 839  *   [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
 840  *     [0] [@2]: dpo-receive
 841  * ff02::1:ff00:0/104
 842  *   unicast-ip6-chain
 843  *   [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
 844  *     [0] [@2]: dpo-receive
 845  * @cliexend
 846  *
 847  * Example of how to display a summary of all IPv6 FIB tables:
 848  * @cliexstart{show ip6 fib summary}
 849  * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
 850  *     Prefix length         Count
 851  *          128                3
 852  *          104                1
 853  *          10                 1
 854  *           0                 1
 855  * ipv6-VRF:8, fib_index 1, flow hash: src dst sport dport proto
 856  *     Prefix length         Count
 857  *          128                5
 858  *          126                1
 859  *          104                1
 860  *          10                 1
 861  *           0                 1
 862  * @cliexend
 863  * @endparblock
 864  ?*/
 865 VLIB_CLI_COMMAND (ip6_show_fib_command, static) = {
 866     .path = "show ip6 fib",
 867     .short_help = "show ip6 fib [summary] [table <table-id>] [index <fib-id>] [<ip6-addr>[/<width>]] [detail]",
 868     .function = ip6_show_fib,
 869 };
 870
 871 static clib_error_t *
 872 ip6_config (vlib_main_t * vm, unformat_input_t * input)
 873 {
 874   uword heapsize = 0;
 875   u32 nbuckets = 0;
 876
 877   while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
 878     {
 879       if (unformat (input, "hash-buckets %d", &nbuckets))
 880           ;
 881       else if (unformat (input, "heap-size %U",
 882                          unformat_memory_size, &heapsize))
 883         ;
 884       else
 885         return clib_error_return (0, "unknown input '%U'",
 886                                   format_unformat_error, input);
 887     }
 888
 889   ip6_fib_table_nbuckets = nbuckets;
 890   ip6_fib_table_size = heapsize;
 891
 892   return 0;
 893 }
 894
 895 VLIB_EARLY_CONFIG_FUNCTION (ip6_config, "ip6");
 896
 897 static clib_error_t *
 898 ip6_fib_init (vlib_main_t * vm)
 899 {
 900     if (ip6_fib_table_nbuckets == 0)
 901         ip6_fib_table_nbuckets = IP6_FIB_DEFAULT_HASH_NUM_BUCKETS;
 902
 903     ip6_fib_table_nbuckets = 1 << max_log2 (ip6_fib_table_nbuckets);
 904
 905     if (ip6_fib_table_size == 0)
 906         ip6_fib_table_size = IP6_FIB_DEFAULT_HASH_MEMORY_SIZE;
 907
 908     clib_bihash_init_24_8 (&(ip6_fib_table[IP6_FIB_TABLE_FWDING].ip6_hash),
 909                            "ip6 FIB fwding table",
 910                            ip6_fib_table_nbuckets, ip6_fib_table_size);
 911     clib_bihash_init_24_8 (&ip6_fib_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
 912                            "ip6 FIB non-fwding table",
 913                            ip6_fib_table_nbuckets, ip6_fib_table_size);
 914
 915     return (NULL);
 916 }
 917
 918 VLIB_INIT_FUNCTION (ip6_fib_init) =
 919 {
 920   .runs_before = VLIB_INITS("ip6_lookup_init"),
 921 };