src/vnet/dpo/replicate_dpo.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/ip/lookup.h>
  17 #include <vnet/dpo/replicate_dpo.h>
  18 #include <vnet/dpo/drop_dpo.h>
  19 #include <vnet/adj/adj.h>
  20 #include <vnet/mpls/mpls_types.h>
  21
  22 #undef REP_DEBUG
  23
  24 #ifdef REP_DEBUG
  25 #define REP_DBG(_rep, _fmt, _args...)                                   \
  26 {                                                                       \
  27     u8* _tmp =NULL;                                                     \
  28     clib_warning("rep:[%s]:" _fmt,                                      \
  29                  replicate_format(replicate_get_index((_rep)),          \
  30                                   0, _tmp),                             \
  31                  ##_args);                                              \
  32     vec_free(_tmp);                                                     \
  33 }
  34 #else
  35 #define REP_DBG(_p, _fmt, _args...)
  36 #endif
  37
  38 #define foreach_replicate_dpo_error                       \
  39 _(BUFFER_ALLOCATION_FAILURE, "Buffer Allocation Failure")
  40
  41 typedef enum {
  42 #define _(sym,str) REPLICATE_DPO_ERROR_##sym,
  43   foreach_replicate_dpo_error
  44 #undef _
  45   REPLICATE_DPO_N_ERROR,
  46 } replicate_dpo_error_t;
  47
  48 static char * replicate_dpo_error_strings[] = {
  49 #define _(sym,string) string,
  50   foreach_replicate_dpo_error
  51 #undef _
  52 };
  53
  54 /**
  55  * Pool of all DPOs. It's not static so the DP can have fast access
  56  */
  57 replicate_t *replicate_pool;
  58
  59 /**
  60  * The one instance of replicate main
  61  */
  62 replicate_main_t replicate_main;
  63
  64 static inline index_t
  65 replicate_get_index (const replicate_t *rep)
  66 {
  67     return (rep - replicate_pool);
  68 }
  69
  70 static inline dpo_id_t*
  71 replicate_get_buckets (replicate_t *rep)
  72 {
  73     if (REP_HAS_INLINE_BUCKETS(rep))
  74     {
  75         return (rep->rep_buckets_inline);
  76     }
  77     else
  78     {
  79         return (rep->rep_buckets);
  80     }
  81 }
  82
  83 static replicate_t *
  84 replicate_alloc_i (void)
  85 {
  86     replicate_t *rep;
  87
  88     pool_get_aligned(replicate_pool, rep, CLIB_CACHE_LINE_BYTES);
  89     memset(rep, 0, sizeof(*rep));
  90
  91     vlib_validate_combined_counter(&(replicate_main.repm_counters),
  92                                    replicate_get_index(rep));
  93     vlib_zero_combined_counter(&(replicate_main.repm_counters),
  94                                replicate_get_index(rep));
  95
  96     return (rep);
  97 }
  98
  99 static u8*
 100 replicate_format (index_t repi,
 101                   replicate_format_flags_t flags,
 102                   u32 indent,
 103                   u8 *s)
 104 {
 105     vlib_counter_t to;
 106     replicate_t *rep;
 107     dpo_id_t *buckets;
 108     u32 i;
 109
 110     repi &= ~MPLS_IS_REPLICATE;
 111     rep = replicate_get(repi);
 112     vlib_get_combined_counter(&(replicate_main.repm_counters), repi, &to);
 113     buckets = replicate_get_buckets(rep);
 114
 115     s = format(s, "%U: ", format_dpo_type, DPO_REPLICATE);
 116     s = format(s, "[index:%d buckets:%d ", repi, rep->rep_n_buckets);
 117     s = format(s, "to:[%Ld:%Ld]]", to.packets, to.bytes);
 118
 119     for (i = 0; i < rep->rep_n_buckets; i++)
 120     {
 121         s = format(s, "\n%U", format_white_space, indent+2);
 122         s = format(s, "[%d]", i);
 123         s = format(s, " %U", format_dpo_id, &buckets[i], indent+6);
 124     }
 125     return (s);
 126 }
 127
 128 u8*
 129 format_replicate (u8 * s, va_list * args)
 130 {
 131     index_t repi = va_arg(*args, index_t);
 132     replicate_format_flags_t flags = va_arg(*args, replicate_format_flags_t);
 133
 134     return (replicate_format(repi, flags, 0, s));
 135 }
 136 static u8*
 137 format_replicate_dpo (u8 * s, va_list * args)
 138 {
 139     index_t repi = va_arg(*args, index_t);
 140     u32 indent = va_arg(*args, u32);
 141
 142     return (replicate_format(repi, REPLICATE_FORMAT_DETAIL, indent, s));
 143 }
 144
 145
 146 static replicate_t *
 147 replicate_create_i (u32 num_buckets,
 148                     dpo_proto_t rep_proto)
 149 {
 150     replicate_t *rep;
 151
 152     rep = replicate_alloc_i();
 153     rep->rep_n_buckets = num_buckets;
 154     rep->rep_proto = rep_proto;
 155
 156     if (!REP_HAS_INLINE_BUCKETS(rep))
 157     {
 158         vec_validate_aligned(rep->rep_buckets,
 159                              rep->rep_n_buckets - 1,
 160                              CLIB_CACHE_LINE_BYTES);
 161     }
 162
 163     REP_DBG(rep, "create");
 164
 165     return (rep);
 166 }
 167
 168 index_t
 169 replicate_create (u32 n_buckets,
 170                   dpo_proto_t rep_proto)
 171 {
 172     return (replicate_get_index(replicate_create_i(n_buckets, rep_proto)));
 173 }
 174
 175 static inline void
 176 replicate_set_bucket_i (replicate_t *rep,
 177                         u32 bucket,
 178                         dpo_id_t *buckets,
 179                         const dpo_id_t *next)
 180 {
 181     dpo_stack(DPO_REPLICATE, rep->rep_proto, &buckets[bucket], next);
 182 }
 183
 184 void
 185 replicate_set_bucket (index_t repi,
 186                       u32 bucket,
 187                       const dpo_id_t *next)
 188 {
 189     replicate_t *rep;
 190     dpo_id_t *buckets;
 191
 192     repi &= ~MPLS_IS_REPLICATE;
 193     rep = replicate_get(repi);
 194     buckets = replicate_get_buckets(rep);
 195
 196     ASSERT(bucket < rep->rep_n_buckets);
 197
 198     replicate_set_bucket_i(rep, bucket, buckets, next);
 199 }
 200
 201 int
 202 replicate_is_drop (const dpo_id_t *dpo)
 203 {
 204     replicate_t *rep;
 205     index_t repi;
 206
 207     if (DPO_REPLICATE != dpo->dpoi_type)
 208         return (0);
 209
 210     repi = dpo->dpoi_index & ~MPLS_IS_REPLICATE;
 211     rep = replicate_get(repi);
 212
 213     if (1 == rep->rep_n_buckets)
 214     {
 215         return (dpo_is_drop(replicate_get_bucket_i(rep, 0)));
 216     }
 217     return (0);
 218 }
 219
 220 const dpo_id_t *
 221 replicate_get_bucket (index_t repi,
 222                       u32 bucket)
 223 {
 224     replicate_t *rep;
 225
 226     repi &= ~MPLS_IS_REPLICATE;
 227     rep = replicate_get(repi);
 228
 229     return (replicate_get_bucket_i(rep, bucket));
 230 }
 231
 232
 233 static load_balance_path_t *
 234 replicate_multipath_next_hop_fixup (load_balance_path_t *nhs,
 235                                     dpo_proto_t drop_proto)
 236 {
 237     if (0 == vec_len(nhs))
 238     {
 239         load_balance_path_t *nh;
 240
 241         /*
 242          * we need something for the replicate. so use the drop
 243          */
 244         vec_add2(nhs, nh, 1);
 245
 246         nh->path_weight = 1;
 247         dpo_copy(&nh->path_dpo, drop_dpo_get(drop_proto));
 248     }
 249
 250     return (nhs);
 251 }
 252
 253 /*
 254  * Fill in adjacencies in block based on corresponding
 255  * next hop adjacencies.
 256  */
 257 static void
 258 replicate_fill_buckets (replicate_t *rep,
 259                         load_balance_path_t *nhs,
 260                         dpo_id_t *buckets,
 261                         u32 n_buckets)
 262 {
 263     load_balance_path_t * nh;
 264     u16 ii, bucket;
 265
 266     bucket = 0;
 267
 268     /*
 269      * the next-hops have normalised weights. that means their sum is the number
 270      * of buckets we need to fill.
 271      */
 272     vec_foreach (nh, nhs)
 273     {
 274         for (ii = 0; ii < nh->path_weight; ii++)
 275         {
 276             ASSERT(bucket < n_buckets);
 277             replicate_set_bucket_i(rep, bucket++, buckets, &nh->path_dpo);
 278         }
 279     }
 280 }
 281
 282 static inline void
 283 replicate_set_n_buckets (replicate_t *rep,
 284                          u32 n_buckets)
 285 {
 286     rep->rep_n_buckets = n_buckets;
 287 }
 288
 289 void
 290 replicate_multipath_update (const dpo_id_t *dpo,
 291                             load_balance_path_t * next_hops)
 292 {
 293     load_balance_path_t * nh, * nhs;
 294     dpo_id_t *tmp_dpo;
 295     u32 ii, n_buckets;
 296     replicate_t *rep;
 297     index_t repi;
 298
 299     ASSERT(DPO_REPLICATE == dpo->dpoi_type);
 300     repi = dpo->dpoi_index & ~MPLS_IS_REPLICATE;
 301     rep = replicate_get(repi);
 302     nhs = replicate_multipath_next_hop_fixup(next_hops,
 303                                              rep->rep_proto);
 304     n_buckets = vec_len(nhs);
 305
 306     if (0 == rep->rep_n_buckets)
 307     {
 308         /*
 309          * first time initialisation. no packets inflight, so we can write
 310          * at leisure.
 311          */
 312         replicate_set_n_buckets(rep, n_buckets);
 313
 314         if (!REP_HAS_INLINE_BUCKETS(rep))
 315             vec_validate_aligned(rep->rep_buckets,
 316                                  rep->rep_n_buckets - 1,
 317                                  CLIB_CACHE_LINE_BYTES);
 318
 319         replicate_fill_buckets(rep, nhs,
 320                                replicate_get_buckets(rep),
 321                                n_buckets);
 322     }
 323     else
 324     {
 325         /*
 326          * This is a modification of an existing replicate.
 327          * We need to ensure that packets in flight see a consistent state, that
 328          * is the number of reported buckets the REP has
 329          * is not more than it actually has. So if the
 330          * number of buckets is increasing, we must update the bucket array first,
 331          * then the reported number. vice-versa if the number of buckets goes down.
 332          */
 333         if (n_buckets == rep->rep_n_buckets)
 334         {
 335             /*
 336              * no change in the number of buckets. we can simply fill what
 337              * is new over what is old.
 338              */
 339             replicate_fill_buckets(rep, nhs,
 340                                    replicate_get_buckets(rep),
 341                                    n_buckets);
 342         }
 343         else if (n_buckets > rep->rep_n_buckets)
 344         {
 345             /*
 346              * we have more buckets. the old replicate map (if there is one)
 347              * will remain valid, i.e. mapping to indices within range, so we
 348              * update it last.
 349              */
 350             if (n_buckets > REP_NUM_INLINE_BUCKETS &&
 351                 rep->rep_n_buckets <= REP_NUM_INLINE_BUCKETS)
 352             {
 353                 /*
 354                  * the new increased number of buckets is crossing the threshold
 355                  * from the inline storage to out-line. Alloc the outline buckets
 356                  * first, then fixup the number. then reset the inlines.
 357                  */
 358                 ASSERT(NULL == rep->rep_buckets);
 359                 vec_validate_aligned(rep->rep_buckets,
 360                                      n_buckets - 1,
 361                                      CLIB_CACHE_LINE_BYTES);
 362
 363                 replicate_fill_buckets(rep, nhs,
 364                                        rep->rep_buckets,
 365                                        n_buckets);
 366                 CLIB_MEMORY_BARRIER();
 367                 replicate_set_n_buckets(rep, n_buckets);
 368
 369                 CLIB_MEMORY_BARRIER();
 370
 371                 for (ii = 0; ii < REP_NUM_INLINE_BUCKETS; ii++)
 372                 {
 373                     dpo_reset(&rep->rep_buckets_inline[ii]);
 374                 }
 375             }
 376             else
 377             {
 378                 if (n_buckets <= REP_NUM_INLINE_BUCKETS)
 379                 {
 380                     /*
 381                      * we are not crossing the threshold and it's still inline buckets.
 382                      * we can write the new on the old..
 383                      */
 384                     replicate_fill_buckets(rep, nhs,
 385                                            replicate_get_buckets(rep),
 386                                            n_buckets);
 387                     CLIB_MEMORY_BARRIER();
 388                     replicate_set_n_buckets(rep, n_buckets);
 389                 }
 390                 else
 391                 {
 392                     /*
 393                      * we are not crossing the threshold. We need a new bucket array to
 394                      * hold the increased number of choices.
 395                      */
 396                     dpo_id_t *new_buckets, *old_buckets, *tmp_dpo;
 397
 398                     new_buckets = NULL;
 399                     old_buckets = replicate_get_buckets(rep);
 400
 401                     vec_validate_aligned(new_buckets,
 402                                          n_buckets - 1,
 403                                          CLIB_CACHE_LINE_BYTES);
 404
 405                     replicate_fill_buckets(rep, nhs, new_buckets, n_buckets);
 406                     CLIB_MEMORY_BARRIER();
 407                     rep->rep_buckets = new_buckets;
 408                     CLIB_MEMORY_BARRIER();
 409                     replicate_set_n_buckets(rep, n_buckets);
 410
 411                     vec_foreach(tmp_dpo, old_buckets)
 412                     {
 413                         dpo_reset(tmp_dpo);
 414                     }
 415                     vec_free(old_buckets);
 416                 }
 417             }
 418         }
 419         else
 420         {
 421             /*
 422              * bucket size shrinkage.
 423              */
 424             if (n_buckets <= REP_NUM_INLINE_BUCKETS &&
 425                 rep->rep_n_buckets > REP_NUM_INLINE_BUCKETS)
 426             {
 427                 /*
 428                  * the new decreased number of buckets is crossing the threshold
 429                  * from out-line storage to inline:
 430                  *   1 - Fill the inline buckets,
 431                  *   2 - fixup the number (and this point the inline buckets are
 432                  *       used).
 433                  *   3 - free the outline buckets
 434                  */
 435                 replicate_fill_buckets(rep, nhs,
 436                                        rep->rep_buckets_inline,
 437                                        n_buckets);
 438                 CLIB_MEMORY_BARRIER();
 439                 replicate_set_n_buckets(rep, n_buckets);
 440                 CLIB_MEMORY_BARRIER();
 441
 442                 vec_foreach(tmp_dpo, rep->rep_buckets)
 443                 {
 444                     dpo_reset(tmp_dpo);
 445                 }
 446                 vec_free(rep->rep_buckets);
 447             }
 448             else
 449             {
 450                 /*
 451                  * not crossing the threshold.
 452                  *  1 - update the number to the smaller size
 453                  *  2 - write the new buckets
 454                  *  3 - reset those no longer used.
 455                  */
 456                 dpo_id_t *buckets;
 457                 u32 old_n_buckets;
 458
 459                 old_n_buckets = rep->rep_n_buckets;
 460                 buckets = replicate_get_buckets(rep);
 461
 462                 replicate_set_n_buckets(rep, n_buckets);
 463                 CLIB_MEMORY_BARRIER();
 464
 465                 replicate_fill_buckets(rep, nhs,
 466                                        buckets,
 467                                        n_buckets);
 468
 469                 for (ii = n_buckets; ii < old_n_buckets; ii++)
 470                 {
 471                     dpo_reset(&buckets[ii]);
 472                 }
 473             }
 474         }
 475     }
 476
 477     vec_foreach (nh, nhs)
 478     {
 479         dpo_reset(&nh->path_dpo);
 480     }
 481     vec_free(nhs);
 482 }
 483
 484 static void
 485 replicate_lock (dpo_id_t *dpo)
 486 {
 487     replicate_t *rep;
 488
 489     rep = replicate_get(dpo->dpoi_index);
 490
 491     rep->rep_locks++;
 492 }
 493
 494 static void
 495 replicate_destroy (replicate_t *rep)
 496 {
 497     dpo_id_t *buckets;
 498     int i;
 499
 500     buckets = replicate_get_buckets(rep);
 501
 502     for (i = 0; i < rep->rep_n_buckets; i++)
 503     {
 504         dpo_reset(&buckets[i]);
 505     }
 506
 507     REP_DBG(rep, "destroy");
 508     if (!REP_HAS_INLINE_BUCKETS(rep))
 509     {
 510         vec_free(rep->rep_buckets);
 511     }
 512
 513     pool_put(replicate_pool, rep);
 514 }
 515
 516 static void
 517 replicate_unlock (dpo_id_t *dpo)
 518 {
 519     replicate_t *rep;
 520
 521     rep = replicate_get(dpo->dpoi_index);
 522
 523     rep->rep_locks--;
 524
 525     if (0 == rep->rep_locks)
 526     {
 527         replicate_destroy(rep);
 528     }
 529 }
 530
 531 static void
 532 replicate_mem_show (void)
 533 {
 534     fib_show_memory_usage("replicate",
 535                           pool_elts(replicate_pool),
 536                           pool_len(replicate_pool),
 537                           sizeof(replicate_t));
 538 }
 539
 540 const static dpo_vft_t rep_vft = {
 541     .dv_lock = replicate_lock,
 542     .dv_unlock = replicate_unlock,
 543     .dv_format = format_replicate_dpo,
 544     .dv_mem_show = replicate_mem_show,
 545 };
 546
 547 /**
 548  * @brief The per-protocol VLIB graph nodes that are assigned to a replicate
 549  *        object.
 550  *
 551  * this means that these graph nodes are ones from which a replicate is the
 552  * parent object in the DPO-graph.
 553  */
 554 const static char* const replicate_ip4_nodes[] =
 555 {
 556     "ip4-replicate",
 557     NULL,
 558 };
 559 const static char* const replicate_ip6_nodes[] =
 560 {
 561     "ip6-replicate",
 562     NULL,
 563 };
 564 const static char* const replicate_mpls_nodes[] =
 565 {
 566     "mpls-replicate",
 567     NULL,
 568 };
 569
 570 const static char* const * const replicate_nodes[DPO_PROTO_NUM] =
 571 {
 572     [DPO_PROTO_IP4]  = replicate_ip4_nodes,
 573     [DPO_PROTO_IP6]  = replicate_ip6_nodes,
 574     [DPO_PROTO_MPLS] = replicate_mpls_nodes,
 575 };
 576
 577 void
 578 replicate_module_init (void)
 579 {
 580     dpo_register(DPO_REPLICATE, &rep_vft, replicate_nodes);
 581 }
 582
 583 static clib_error_t *
 584 replicate_show (vlib_main_t * vm,
 585                 unformat_input_t * input,
 586                 vlib_cli_command_t * cmd)
 587 {
 588     index_t repi = INDEX_INVALID;
 589
 590     while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
 591     {
 592         if (unformat (input, "%d", &repi))
 593             ;
 594         else
 595             break;
 596     }
 597
 598     if (INDEX_INVALID != repi)
 599     {
 600         vlib_cli_output (vm, "%U", format_replicate, repi,
 601                          REPLICATE_FORMAT_DETAIL);
 602     }
 603     else
 604     {
 605         replicate_t *rep;
 606
 607         pool_foreach(rep, replicate_pool,
 608         ({
 609             vlib_cli_output (vm, "%U", format_replicate,
 610                              replicate_get_index(rep),
 611                              REPLICATE_FORMAT_NONE);
 612         }));
 613     }
 614
 615     return 0;
 616 }
 617
 618 VLIB_CLI_COMMAND (replicate_show_command, static) = {
 619     .path = "show replicate",
 620     .short_help = "show replicate [<index>]",
 621     .function = replicate_show,
 622 };
 623
 624 typedef struct replicate_trace_t_
 625 {
 626     index_t rep_index;
 627     dpo_id_t dpo;
 628 } replicate_trace_t;
 629
 630 static uword
 631 replicate_inline (vlib_main_t * vm,
 632                   vlib_node_runtime_t * node,
 633                   vlib_frame_t * frame)
 634 {
 635     vlib_combined_counter_main_t * cm = &replicate_main.repm_counters;
 636     replicate_main_t * rm = &replicate_main;
 637     u32 n_left_from, * from, * to_next, next_index;
 638     u32 thread_index = vlib_get_thread_index();
 639
 640     from = vlib_frame_vector_args (frame);
 641     n_left_from = frame->n_vectors;
 642     next_index = node->cached_next_index;
 643
 644     while (n_left_from > 0)
 645     {
 646         u32 n_left_to_next;
 647
 648         vlib_get_next_frame (vm, node, next_index,
 649                              to_next, n_left_to_next);
 650
 651         while (n_left_from > 0 && n_left_to_next > 0)
 652         {
 653             u32 next0, ci0, bi0, bucket, repi0;
 654             const replicate_t *rep0;
 655             vlib_buffer_t * b0, *c0;
 656             const dpo_id_t *dpo0;
 657             u8 num_cloned;
 658
 659             bi0 = from[0];
 660             from += 1;
 661             n_left_from -= 1;
 662
 663             b0 = vlib_get_buffer (vm, bi0);
 664             repi0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
 665             rep0 = replicate_get(repi0);
 666
 667             vlib_increment_combined_counter(
 668                 cm, thread_index, repi0, 1,
 669                 vlib_buffer_length_in_chain(vm, b0));
 670
 671             vec_validate (rm->clones[thread_index], rep0->rep_n_buckets - 1);
 672
 673             num_cloned = vlib_buffer_clone (vm, bi0, rm->clones[thread_index], rep0->rep_n_buckets, 128);
 674
 675             if (num_cloned != rep0->rep_n_buckets)
 676               {
 677                 vlib_node_increment_counter
 678                   (vm, node->node_index,
 679                    REPLICATE_DPO_ERROR_BUFFER_ALLOCATION_FAILURE, 1);
 680               }
 681
 682             for (bucket = 0; bucket < num_cloned; bucket++)
 683             {
 684                 ci0 = rm->clones[thread_index][bucket];
 685                 c0 = vlib_get_buffer(vm, ci0);
 686
 687                 to_next[0] = ci0;
 688                 to_next += 1;
 689                 n_left_to_next -= 1;
 690
 691                 dpo0 = replicate_get_bucket_i(rep0, bucket);
 692                 next0 = dpo0->dpoi_next_node;
 693                 vnet_buffer (c0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
 694
 695                 if (PREDICT_FALSE(c0->flags & VLIB_BUFFER_IS_TRACED))
 696                 {
 697                     replicate_trace_t *t = vlib_add_trace (vm, node, c0, sizeof (*t));
 698                     t->rep_index = repi0;
 699                     t->dpo = *dpo0;
 700                 }
 701
 702                 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
 703                                                  to_next, n_left_to_next,
 704                                                  ci0, next0);
 705                 if (PREDICT_FALSE (n_left_to_next == 0))
 706                   {
 707                     vlib_put_next_frame (vm, node, next_index, n_left_to_next);
 708                     vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
 709                   }
 710             }
 711             vec_reset_length (rm->clones[thread_index]);
 712         }
 713
 714         vlib_put_next_frame (vm, node, next_index, n_left_to_next);
 715     }
 716
 717     return frame->n_vectors;
 718 }
 719
 720 static u8 *
 721 format_replicate_trace (u8 * s, va_list * args)
 722 {
 723   CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
 724   CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
 725   replicate_trace_t *t = va_arg (*args, replicate_trace_t *);
 726
 727   s = format (s, "replicate: %d via %U",
 728               t->rep_index,
 729               format_dpo_id, &t->dpo, 0);
 730   return s;
 731 }
 732
 733 static uword
 734 ip4_replicate (vlib_main_t * vm,
 735                vlib_node_runtime_t * node,
 736                vlib_frame_t * frame)
 737 {
 738     return (replicate_inline (vm, node, frame));
 739 }
 740
 741 /**
 742  * @brief IP4 replication node
 743  */
 744 VLIB_REGISTER_NODE (ip4_replicate_node) = {
 745   .function = ip4_replicate,
 746   .name = "ip4-replicate",
 747   .vector_size = sizeof (u32),
 748
 749   .n_errors = ARRAY_LEN(replicate_dpo_error_strings),
 750   .error_strings = replicate_dpo_error_strings,
 751
 752   .format_trace = format_replicate_trace,
 753   .n_next_nodes = 1,
 754   .next_nodes = {
 755       [0] = "ip4-drop",
 756   },
 757 };
 758
 759 static uword
 760 ip6_replicate (vlib_main_t * vm,
 761                vlib_node_runtime_t * node,
 762                vlib_frame_t * frame)
 763 {
 764     return (replicate_inline (vm, node, frame));
 765 }
 766
 767 /**
 768  * @brief IPv6 replication node
 769  */
 770 VLIB_REGISTER_NODE (ip6_replicate_node) = {
 771   .function = ip6_replicate,
 772   .name = "ip6-replicate",
 773   .vector_size = sizeof (u32),
 774
 775   .n_errors = ARRAY_LEN(replicate_dpo_error_strings),
 776   .error_strings = replicate_dpo_error_strings,
 777
 778   .format_trace = format_replicate_trace,
 779   .n_next_nodes = 1,
 780   .next_nodes = {
 781       [0] = "ip6-drop",
 782   },
 783 };
 784
 785 static uword
 786 mpls_replicate (vlib_main_t * vm,
 787                 vlib_node_runtime_t * node,
 788                 vlib_frame_t * frame)
 789 {
 790     return (replicate_inline (vm, node, frame));
 791 }
 792
 793 /**
 794  * @brief MPLS replication node
 795  */
 796 VLIB_REGISTER_NODE (mpls_replicate_node) = {
 797   .function = mpls_replicate,
 798   .name = "mpls-replicate",
 799   .vector_size = sizeof (u32),
 800
 801   .n_errors = ARRAY_LEN(replicate_dpo_error_strings),
 802   .error_strings = replicate_dpo_error_strings,
 803
 804   .format_trace = format_replicate_trace,
 805   .n_next_nodes = 1,
 806   .next_nodes = {
 807       [0] = "mpls-drop",
 808   },
 809 };
 810
 811 clib_error_t *
 812 replicate_dpo_init (vlib_main_t * vm)
 813 {
 814   replicate_main_t * rm = &replicate_main;
 815
 816   vec_validate (rm->clones, vlib_num_workers());
 817
 818   return 0;
 819 }
 820
 821 VLIB_INIT_FUNCTION (replicate_dpo_init);