src/vnet/interface_output.c

   1 /*
   2  * Copyright (c) 2015 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  * interface_output.c: interface output node
  17  *
  18  * Copyright (c) 2008 Eliot Dresselhaus
  19  *
  20  * Permission is hereby granted, free of charge, to any person obtaining
  21  * a copy of this software and associated documentation files (the
  22  * "Software"), to deal in the Software without restriction, including
  23  * without limitation the rights to use, copy, modify, merge, publish,
  24  * distribute, sublicense, and/or sell copies of the Software, and to
  25  * permit persons to whom the Software is furnished to do so, subject to
  26  * the following conditions:
  27  *
  28  * The above copyright notice and this permission notice shall be
  29  * included in all copies or substantial portions of the Software.
  30  *
  31  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  32  *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  33  *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  34  *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  35  *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  36  *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  37  *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  38  */
  39
  40 #include <vnet/vnet.h>
  41 #include <vnet/ip/icmp46_packet.h>
  42 #include <vnet/ethernet/packet.h>
  43 #include <vnet/ip/ip4.h>
  44 #include <vnet/ip/ip6.h>
  45 #include <vnet/udp/udp_packet.h>
  46 #include <vnet/feature/feature.h>
  47 #include <vnet/classify/trace_classify.h>
  48 #include <vnet/interface_output.h>
  49
  50 typedef struct
  51 {
  52   u32 sw_if_index;
  53   u32 flags;
  54   u8 data[128 - 2 * sizeof (u32)];
  55 }
  56 interface_output_trace_t;
  57
  58 #ifndef CLIB_MARCH_VARIANT
  59 u8 *
  60 format_vnet_interface_output_trace (u8 * s, va_list * va)
  61 {
  62   CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
  63   vlib_node_t *node = va_arg (*va, vlib_node_t *);
  64   interface_output_trace_t *t = va_arg (*va, interface_output_trace_t *);
  65   vnet_main_t *vnm = vnet_get_main ();
  66   vnet_sw_interface_t *si;
  67   u32 indent;
  68
  69   if (t->sw_if_index != (u32) ~ 0)
  70     {
  71       indent = format_get_indent (s);
  72
  73       if (pool_is_free_index
  74           (vnm->interface_main.sw_interfaces, t->sw_if_index))
  75         {
  76           /* the interface may have been deleted by the time the trace is printed */
  77           s = format (s, "sw_if_index: %d ", t->sw_if_index);
  78         }
  79       else
  80         {
  81           si = vnet_get_sw_interface (vnm, t->sw_if_index);
  82           s =
  83             format (s, "%U ", format_vnet_sw_interface_name, vnm, si,
  84                     t->flags);
  85         }
  86       s =
  87         format (s, "\n%U%U", format_white_space, indent,
  88                 node->format_buffer ? node->format_buffer : format_hex_bytes,
  89                 t->data, sizeof (t->data));
  90     }
  91   return s;
  92 }
  93
  94 static void
  95 vnet_interface_output_trace (vlib_main_t * vm,
  96                              vlib_node_runtime_t * node,
  97                              vlib_frame_t * frame, uword n_buffers)
  98 {
  99   u32 n_left, *from;
 100
 101   n_left = n_buffers;
 102   from = vlib_frame_vector_args (frame);
 103
 104   while (n_left >= 4)
 105     {
 106       u32 bi0, bi1;
 107       vlib_buffer_t *b0, *b1;
 108       interface_output_trace_t *t0, *t1;
 109
 110       /* Prefetch next iteration. */
 111       vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
 112       vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
 113
 114       bi0 = from[0];
 115       bi1 = from[1];
 116
 117       b0 = vlib_get_buffer (vm, bi0);
 118       b1 = vlib_get_buffer (vm, bi1);
 119
 120       if (b0->flags & VLIB_BUFFER_IS_TRACED)
 121         {
 122           t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
 123           t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
 124           t0->flags = b0->flags;
 125           clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0),
 126                             sizeof (t0->data));
 127         }
 128       if (b1->flags & VLIB_BUFFER_IS_TRACED)
 129         {
 130           t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
 131           t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_TX];
 132           t1->flags = b1->flags;
 133           clib_memcpy_fast (t1->data, vlib_buffer_get_current (b1),
 134                             sizeof (t1->data));
 135         }
 136       from += 2;
 137       n_left -= 2;
 138     }
 139
 140   while (n_left >= 1)
 141     {
 142       u32 bi0;
 143       vlib_buffer_t *b0;
 144       interface_output_trace_t *t0;
 145
 146       bi0 = from[0];
 147
 148       b0 = vlib_get_buffer (vm, bi0);
 149
 150       if (b0->flags & VLIB_BUFFER_IS_TRACED)
 151         {
 152           t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
 153           t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
 154           t0->flags = b0->flags;
 155           clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0),
 156                             sizeof (t0->data));
 157         }
 158       from += 1;
 159       n_left -= 1;
 160     }
 161 }
 162
 163 static_always_inline uword
 164 vnet_interface_output_node_inline (vlib_main_t * vm,
 165                                    vlib_node_runtime_t * node,
 166                                    vlib_frame_t * frame,
 167                                    vnet_main_t * vnm,
 168                                    vnet_hw_interface_t * hi,
 169                                    int do_tx_offloads)
 170 {
 171   vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
 172   vnet_sw_interface_t *si;
 173   u32 n_left_to_tx, *from, *from_end, *to_tx;
 174   u32 n_bytes, n_buffers, n_packets;
 175   u32 n_bytes_b0, n_bytes_b1, n_bytes_b2, n_bytes_b3;
 176   u32 thread_index = vm->thread_index;
 177   vnet_interface_main_t *im = &vnm->interface_main;
 178   u32 next_index = VNET_INTERFACE_OUTPUT_NEXT_TX;
 179   u32 current_config_index = ~0;
 180   u8 arc = im->output_feature_arc_index;
 181   vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
 182
 183   n_buffers = frame->n_vectors;
 184
 185   if (node->flags & VLIB_NODE_FLAG_TRACE)
 186     vnet_interface_output_trace (vm, node, frame, n_buffers);
 187
 188   from = vlib_frame_vector_args (frame);
 189   vlib_get_buffers (vm, from, b, n_buffers);
 190
 191   if (rt->is_deleted)
 192     return vlib_error_drop_buffers (vm, node, from,
 193                                     /* buffer stride */ 1,
 194                                     n_buffers,
 195                                     VNET_INTERFACE_OUTPUT_NEXT_DROP,
 196                                     node->node_index,
 197                                     VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DELETED);
 198
 199   si = vnet_get_sw_interface (vnm, rt->sw_if_index);
 200   hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
 201   if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ||
 202       !(hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
 203     {
 204       vlib_simple_counter_main_t *cm;
 205
 206       cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
 207                              VNET_INTERFACE_COUNTER_TX_ERROR);
 208       vlib_increment_simple_counter (cm, thread_index,
 209                                      rt->sw_if_index, n_buffers);
 210
 211       return vlib_error_drop_buffers (vm, node, from,
 212                                       /* buffer stride */ 1,
 213                                       n_buffers,
 214                                       VNET_INTERFACE_OUTPUT_NEXT_DROP,
 215                                       node->node_index,
 216                                       VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DOWN);
 217     }
 218
 219   from_end = from + n_buffers;
 220
 221   /* Total byte count of all buffers. */
 222   n_bytes = 0;
 223   n_packets = 0;
 224
 225   /* interface-output feature arc handling */
 226   if (PREDICT_FALSE (vnet_have_features (arc, rt->sw_if_index)))
 227     {
 228       vnet_feature_config_main_t *fcm;
 229       fcm = vnet_feature_get_config_main (arc);
 230       current_config_index = vnet_get_feature_config_index (arc,
 231                                                             rt->sw_if_index);
 232       vnet_get_config_data (&fcm->config_main, &current_config_index,
 233                             &next_index, 0);
 234     }
 235
 236   while (from < from_end)
 237     {
 238       /* Get new next frame since previous incomplete frame may have less
 239          than VNET_FRAME_SIZE vectors in it. */
 240       vlib_get_new_next_frame (vm, node, next_index, to_tx, n_left_to_tx);
 241
 242       while (from + 8 <= from_end && n_left_to_tx >= 4)
 243         {
 244           u32 bi0, bi1, bi2, bi3;
 245           u32 tx_swif0, tx_swif1, tx_swif2, tx_swif3;
 246           u32 or_flags;
 247
 248           /* Prefetch next iteration. */
 249           vlib_prefetch_buffer_header (b[4], LOAD);
 250           vlib_prefetch_buffer_header (b[5], LOAD);
 251           vlib_prefetch_buffer_header (b[6], LOAD);
 252           vlib_prefetch_buffer_header (b[7], LOAD);
 253
 254           bi0 = from[0];
 255           bi1 = from[1];
 256           bi2 = from[2];
 257           bi3 = from[3];
 258           to_tx[0] = bi0;
 259           to_tx[1] = bi1;
 260           to_tx[2] = bi2;
 261           to_tx[3] = bi3;
 262
 263           or_flags = b[0]->flags | b[1]->flags | b[2]->flags | b[3]->flags;
 264
 265           from += 4;
 266           to_tx += 4;
 267           n_left_to_tx -= 4;
 268
 269           /* Be grumpy about zero length buffers for benefit of
 270              driver tx function. */
 271           ASSERT (b[0]->current_length > 0);
 272           ASSERT (b[1]->current_length > 0);
 273           ASSERT (b[2]->current_length > 0);
 274           ASSERT (b[3]->current_length > 0);
 275
 276           n_bytes_b0 = vlib_buffer_length_in_chain (vm, b[0]);
 277           n_bytes_b1 = vlib_buffer_length_in_chain (vm, b[1]);
 278           n_bytes_b2 = vlib_buffer_length_in_chain (vm, b[2]);
 279           n_bytes_b3 = vlib_buffer_length_in_chain (vm, b[3]);
 280           tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
 281           tx_swif1 = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
 282           tx_swif2 = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
 283           tx_swif3 = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
 284
 285           n_bytes += n_bytes_b0 + n_bytes_b1;
 286           n_bytes += n_bytes_b2 + n_bytes_b3;
 287           n_packets += 4;
 288
 289           if (PREDICT_FALSE (current_config_index != ~0))
 290             {
 291               vnet_buffer (b[0])->feature_arc_index = arc;
 292               vnet_buffer (b[1])->feature_arc_index = arc;
 293               vnet_buffer (b[2])->feature_arc_index = arc;
 294               vnet_buffer (b[3])->feature_arc_index = arc;
 295               b[0]->current_config_index = current_config_index;
 296               b[1]->current_config_index = current_config_index;
 297               b[2]->current_config_index = current_config_index;
 298               b[3]->current_config_index = current_config_index;
 299             }
 300
 301           /* update vlan subif tx counts, if required */
 302           if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
 303             {
 304               vlib_increment_combined_counter (im->combined_sw_if_counters +
 305                                                VNET_INTERFACE_COUNTER_TX,
 306                                                thread_index, tx_swif0, 1,
 307                                                n_bytes_b0);
 308             }
 309
 310           if (PREDICT_FALSE (tx_swif1 != rt->sw_if_index))
 311             {
 312
 313               vlib_increment_combined_counter (im->combined_sw_if_counters +
 314                                                VNET_INTERFACE_COUNTER_TX,
 315                                                thread_index, tx_swif1, 1,
 316                                                n_bytes_b1);
 317             }
 318
 319           if (PREDICT_FALSE (tx_swif2 != rt->sw_if_index))
 320             {
 321
 322               vlib_increment_combined_counter (im->combined_sw_if_counters +
 323                                                VNET_INTERFACE_COUNTER_TX,
 324                                                thread_index, tx_swif2, 1,
 325                                                n_bytes_b2);
 326             }
 327           if (PREDICT_FALSE (tx_swif3 != rt->sw_if_index))
 328             {
 329
 330               vlib_increment_combined_counter (im->combined_sw_if_counters +
 331                                                VNET_INTERFACE_COUNTER_TX,
 332                                                thread_index, tx_swif3, 1,
 333                                                n_bytes_b3);
 334             }
 335
 336           if (do_tx_offloads)
 337             {
 338               u32 vnet_buffer_offload_flags =
 339                 (VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
 340                  VNET_BUFFER_F_OFFLOAD_UDP_CKSUM |
 341                  VNET_BUFFER_F_OFFLOAD_IP_CKSUM);
 342               if (or_flags & vnet_buffer_offload_flags)
 343                 {
 344                   if (b[0]->flags & vnet_buffer_offload_flags)
 345                     vnet_calc_checksums_inline
 346                       (vm, b[0],
 347                        b[0]->flags & VNET_BUFFER_F_IS_IP4,
 348                        b[0]->flags & VNET_BUFFER_F_IS_IP6);
 349                   if (b[1]->flags & vnet_buffer_offload_flags)
 350                     vnet_calc_checksums_inline
 351                       (vm, b[1],
 352                        b[1]->flags & VNET_BUFFER_F_IS_IP4,
 353                        b[1]->flags & VNET_BUFFER_F_IS_IP6);
 354                   if (b[2]->flags & vnet_buffer_offload_flags)
 355                     vnet_calc_checksums_inline
 356                       (vm, b[2],
 357                        b[2]->flags & VNET_BUFFER_F_IS_IP4,
 358                        b[2]->flags & VNET_BUFFER_F_IS_IP6);
 359                   if (b[3]->flags & vnet_buffer_offload_flags)
 360                     vnet_calc_checksums_inline
 361                       (vm, b[3],
 362                        b[3]->flags & VNET_BUFFER_F_IS_IP4,
 363                        b[3]->flags & VNET_BUFFER_F_IS_IP6);
 364                 }
 365             }
 366           b += 4;
 367
 368         }
 369
 370       while (from + 1 <= from_end && n_left_to_tx >= 1)
 371         {
 372           u32 bi0;
 373           u32 tx_swif0;
 374
 375           bi0 = from[0];
 376           to_tx[0] = bi0;
 377           from += 1;
 378           to_tx += 1;
 379           n_left_to_tx -= 1;
 380
 381           /* Be grumpy about zero length buffers for benefit of
 382              driver tx function. */
 383           ASSERT (b[0]->current_length > 0);
 384
 385           n_bytes_b0 = vlib_buffer_length_in_chain (vm, b[0]);
 386           tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
 387           n_bytes += n_bytes_b0;
 388           n_packets += 1;
 389
 390           if (PREDICT_FALSE (current_config_index != ~0))
 391             {
 392               vnet_buffer (b[0])->feature_arc_index = arc;
 393               b[0]->current_config_index = current_config_index;
 394             }
 395
 396           if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
 397             {
 398
 399               vlib_increment_combined_counter (im->combined_sw_if_counters +
 400                                                VNET_INTERFACE_COUNTER_TX,
 401                                                thread_index, tx_swif0, 1,
 402                                                n_bytes_b0);
 403             }
 404
 405           if (do_tx_offloads)
 406             {
 407               if (b[0]->flags &
 408                   (VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
 409                    VNET_BUFFER_F_OFFLOAD_UDP_CKSUM |
 410                    VNET_BUFFER_F_OFFLOAD_IP_CKSUM))
 411                 vnet_calc_checksums_inline
 412                   (vm, b[0],
 413                    b[0]->flags & VNET_BUFFER_F_IS_IP4,
 414                    b[0]->flags & VNET_BUFFER_F_IS_IP6);
 415             }
 416           b += 1;
 417         }
 418
 419       vlib_put_next_frame (vm, node, next_index, n_left_to_tx);
 420     }
 421
 422   /* Update main interface stats. */
 423   vlib_increment_combined_counter (im->combined_sw_if_counters
 424                                    + VNET_INTERFACE_COUNTER_TX,
 425                                    thread_index,
 426                                    rt->sw_if_index, n_packets, n_bytes);
 427   return n_buffers;
 428 }
 429 #endif /* CLIB_MARCH_VARIANT */
 430
 431 static_always_inline void vnet_interface_pcap_tx_trace
 432   (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame,
 433    int sw_if_index_from_buffer)
 434 {
 435   u32 n_left_from, *from;
 436   u32 sw_if_index;
 437   vnet_pcap_t *pp = &vlib_global_main.pcap;
 438
 439   if (PREDICT_TRUE (pp->pcap_tx_enable == 0))
 440     return;
 441
 442   if (sw_if_index_from_buffer == 0)
 443     {
 444       vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
 445       sw_if_index = rt->sw_if_index;
 446     }
 447   else
 448     sw_if_index = ~0;
 449
 450   n_left_from = frame->n_vectors;
 451   from = vlib_frame_vector_args (frame);
 452
 453   while (n_left_from > 0)
 454     {
 455       int classify_filter_result;
 456       u32 bi0 = from[0];
 457       vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
 458       from++;
 459       n_left_from--;
 460
 461       if (pp->filter_classify_table_index != ~0)
 462         {
 463           classify_filter_result =
 464             vnet_is_packet_traced_inline
 465             (b0, pp->filter_classify_table_index, 0 /* full classify */ );
 466           if (classify_filter_result)
 467             pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
 468           continue;
 469         }
 470
 471       if (sw_if_index_from_buffer)
 472         sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
 473
 474       if (pp->pcap_sw_if_index == 0 || pp->pcap_sw_if_index == sw_if_index)
 475         {
 476           vnet_main_t *vnm = vnet_get_main ();
 477           vnet_hw_interface_t *hi =
 478             vnet_get_sup_hw_interface (vnm, sw_if_index);
 479           /* Capture pkt if not filtered, or if filter hits */
 480           if (hi->trace_classify_table_index == ~0 ||
 481               vnet_is_packet_traced_inline
 482               (b0, hi->trace_classify_table_index, 0 /* full classify */ ))
 483             pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
 484         }
 485     }
 486 }
 487
 488 #ifndef CLIB_MARCH_VARIANT
 489
 490 uword
 491 vnet_interface_output_node (vlib_main_t * vm, vlib_node_runtime_t * node,
 492                             vlib_frame_t * frame)
 493 {
 494   vnet_main_t *vnm = vnet_get_main ();
 495   vnet_hw_interface_t *hi;
 496   vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
 497   hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
 498
 499   vnet_interface_pcap_tx_trace (vm, node, frame,
 500                                 0 /* sw_if_index_from_buffer */ );
 501
 502   if (hi->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD)
 503     return vnet_interface_output_node_inline (vm, node, frame, vnm, hi,
 504                                               /* do_tx_offloads */ 0);
 505   else
 506     return vnet_interface_output_node_inline (vm, node, frame, vnm, hi,
 507                                               /* do_tx_offloads */ 1);
 508 }
 509 #endif /* CLIB_MARCH_VARIANT */
 510
 511 /* Use buffer's sw_if_index[VNET_TX] to choose output interface. */
 512 VLIB_NODE_FN (vnet_per_buffer_interface_output_node) (vlib_main_t * vm,
 513                                                       vlib_node_runtime_t *
 514                                                       node,
 515                                                       vlib_frame_t * frame)
 516 {
 517   vnet_main_t *vnm = vnet_get_main ();
 518   u32 n_left_to_next, *from, *to_next;
 519   u32 n_left_from, next_index;
 520
 521   vnet_interface_pcap_tx_trace (vm, node, frame,
 522                                 1 /* sw_if_index_from_buffer */ );
 523
 524   n_left_from = frame->n_vectors;
 525
 526   from = vlib_frame_vector_args (frame);
 527   next_index = node->cached_next_index;
 528
 529   while (n_left_from > 0)
 530     {
 531       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
 532
 533       while (n_left_from >= 4 && n_left_to_next >= 2)
 534         {
 535           u32 bi0, bi1, next0, next1;
 536           vlib_buffer_t *b0, *b1;
 537           vnet_hw_interface_t *hi0, *hi1;
 538
 539           /* Prefetch next iteration. */
 540           vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
 541           vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
 542
 543           bi0 = from[0];
 544           bi1 = from[1];
 545           to_next[0] = bi0;
 546           to_next[1] = bi1;
 547           from += 2;
 548           to_next += 2;
 549           n_left_to_next -= 2;
 550           n_left_from -= 2;
 551
 552           b0 = vlib_get_buffer (vm, bi0);
 553           b1 = vlib_get_buffer (vm, bi1);
 554
 555           hi0 =
 556             vnet_get_sup_hw_interface (vnm,
 557                                        vnet_buffer (b0)->sw_if_index
 558                                        [VLIB_TX]);
 559           hi1 =
 560             vnet_get_sup_hw_interface (vnm,
 561                                        vnet_buffer (b1)->sw_if_index
 562                                        [VLIB_TX]);
 563
 564           next0 = hi0->output_node_next_index;
 565           next1 = hi1->output_node_next_index;
 566
 567           vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
 568                                            n_left_to_next, bi0, bi1, next0,
 569                                            next1);
 570         }
 571
 572       while (n_left_from > 0 && n_left_to_next > 0)
 573         {
 574           u32 bi0, next0;
 575           vlib_buffer_t *b0;
 576           vnet_hw_interface_t *hi0;
 577
 578           bi0 = from[0];
 579           to_next[0] = bi0;
 580           from += 1;
 581           to_next += 1;
 582           n_left_to_next -= 1;
 583           n_left_from -= 1;
 584
 585           b0 = vlib_get_buffer (vm, bi0);
 586
 587           hi0 =
 588             vnet_get_sup_hw_interface (vnm,
 589                                        vnet_buffer (b0)->sw_if_index
 590                                        [VLIB_TX]);
 591
 592           next0 = hi0->output_node_next_index;
 593
 594           vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
 595                                            n_left_to_next, bi0, next0);
 596         }
 597
 598       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
 599     }
 600
 601   return frame->n_vectors;
 602 }
 603
 604 typedef struct vnet_error_trace_t_
 605 {
 606   u32 sw_if_index;
 607   i8 details_valid;
 608   u8 is_ip6;
 609   u8 pad[2];
 610   u16 mactype;
 611   ip46_address_t src, dst;
 612 } vnet_error_trace_t;
 613
 614 static u8 *
 615 format_vnet_error_trace (u8 * s, va_list * va)
 616 {
 617   CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
 618   CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
 619   vnet_error_trace_t *t = va_arg (*va, vnet_error_trace_t *);
 620
 621   /* Normal, non-catchup trace */
 622   if (t->details_valid == 0)
 623     {
 624       s = format (s, "rx:%U", format_vnet_sw_if_index_name,
 625                   vnet_get_main (), t->sw_if_index);
 626     }
 627   else if (t->details_valid == 1)
 628     {
 629       /* The trace capture code didn't understant the mactype */
 630       s = format (s, "mactype 0x%4x (not decoded)", t->mactype);
 631     }
 632   else if (t->details_valid == 2)
 633     {
 634       /* Dump the src/dst addresses */
 635       if (t->is_ip6 == 0)
 636         s = format (s, "IP4: %U -> %U",
 637                     format_ip4_address, &t->src.ip4,
 638                     format_ip4_address, &t->dst.ip4);
 639       else
 640         s = format (s, "IP6: %U -> %U",
 641                     format_ip6_address, &t->src.ip6,
 642                     format_ip6_address, &t->dst.ip6);
 643     }
 644   return s;
 645 }
 646
 647 static void
 648 interface_trace_buffers (vlib_main_t * vm,
 649                          vlib_node_runtime_t * node, vlib_frame_t * frame)
 650 {
 651   u32 n_left, *buffers;
 652
 653   buffers = vlib_frame_vector_args (frame);
 654   n_left = frame->n_vectors;
 655
 656   while (n_left >= 4)
 657     {
 658       u32 bi0, bi1;
 659       vlib_buffer_t *b0, *b1;
 660       vnet_error_trace_t *t0, *t1;
 661
 662       /* Prefetch next iteration. */
 663       vlib_prefetch_buffer_with_index (vm, buffers[2], LOAD);
 664       vlib_prefetch_buffer_with_index (vm, buffers[3], LOAD);
 665
 666       bi0 = buffers[0];
 667       bi1 = buffers[1];
 668
 669       b0 = vlib_get_buffer (vm, bi0);
 670       b1 = vlib_get_buffer (vm, bi1);
 671
 672       if (b0->flags & VLIB_BUFFER_IS_TRACED)
 673         {
 674           t0 = vlib_add_trace (vm, node, b0,
 675                                STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
 676           t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
 677           t0->details_valid = 0;
 678         }
 679       if (b1->flags & VLIB_BUFFER_IS_TRACED)
 680         {
 681           t1 = vlib_add_trace (vm, node, b1,
 682                                STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
 683           t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_RX];
 684           t1->details_valid = 0;
 685         }
 686       buffers += 2;
 687       n_left -= 2;
 688     }
 689
 690   while (n_left >= 1)
 691     {
 692       u32 bi0;
 693       vlib_buffer_t *b0;
 694       vnet_error_trace_t *t0;
 695
 696       bi0 = buffers[0];
 697
 698       b0 = vlib_get_buffer (vm, bi0);
 699
 700       if (b0->flags & VLIB_BUFFER_IS_TRACED)
 701         {
 702           t0 = vlib_add_trace (vm, node, b0,
 703                                STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
 704           t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
 705           t0->details_valid = 0;
 706         }
 707       buffers += 1;
 708       n_left -= 1;
 709     }
 710 }
 711
 712 typedef enum
 713 {
 714   VNET_ERROR_DISPOSITION_DROP,
 715   VNET_ERROR_DISPOSITION_PUNT,
 716   VNET_ERROR_N_DISPOSITION,
 717 } vnet_error_disposition_t;
 718
 719 static void
 720 drop_catchup_trace (vlib_main_t * vm,
 721                     vlib_node_runtime_t * node, vlib_buffer_t * b)
 722 {
 723   /* Can we safely rewind the buffer? If not, fagedaboudit */
 724   if (b->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
 725     {
 726       vnet_error_trace_t *t;
 727       ip4_header_t *ip4;
 728       ip6_header_t *ip6;
 729       ethernet_header_t *eh;
 730       i16 delta;
 731
 732       t = vlib_add_trace (vm, node, b, sizeof (*t));
 733       delta = vnet_buffer (b)->l2_hdr_offset - b->current_data;
 734       vlib_buffer_advance (b, delta);
 735
 736       eh = vlib_buffer_get_current (b);
 737       /* Save mactype */
 738       t->mactype = clib_net_to_host_u16 (eh->type);
 739       t->details_valid = 1;
 740       switch (t->mactype)
 741         {
 742         case ETHERNET_TYPE_IP4:
 743           ip4 = (void *) (eh + 1);
 744           t->details_valid = 2;
 745           t->is_ip6 = 0;
 746           t->src.ip4.as_u32 = ip4->src_address.as_u32;
 747           t->dst.ip4.as_u32 = ip4->dst_address.as_u32;
 748           break;
 749
 750         case ETHERNET_TYPE_IP6:
 751           ip6 = (void *) (eh + 1);
 752           t->details_valid = 2;
 753           t->is_ip6 = 1;
 754           clib_memcpy_fast (t->src.as_u8, ip6->src_address.as_u8,
 755                             sizeof (ip6_address_t));
 756           clib_memcpy_fast (t->dst.as_u8, ip6->dst_address.as_u8,
 757                             sizeof (ip6_address_t));
 758           break;
 759
 760         default:
 761           /* Dunno, do nothing, leave details_valid alone */
 762           break;
 763         }
 764       /* Restore current data (probably unnecessary) */
 765       vlib_buffer_advance (b, -delta);
 766     }
 767 }
 768
 769 static_always_inline uword
 770 interface_drop_punt (vlib_main_t * vm,
 771                      vlib_node_runtime_t * node,
 772                      vlib_frame_t * frame,
 773                      vnet_error_disposition_t disposition)
 774 {
 775   u32 *from, n_left, thread_index, *sw_if_index;
 776   vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
 777   u32 sw_if_indices[VLIB_FRAME_SIZE];
 778   vlib_simple_counter_main_t *cm;
 779   u16 nexts[VLIB_FRAME_SIZE];
 780   u32 n_trace;
 781   vnet_main_t *vnm;
 782
 783   vnm = vnet_get_main ();
 784   thread_index = vm->thread_index;
 785   from = vlib_frame_vector_args (frame);
 786   n_left = frame->n_vectors;
 787   b = bufs;
 788   sw_if_index = sw_if_indices;
 789
 790   vlib_get_buffers (vm, from, bufs, n_left);
 791
 792   /* "trace add error-drop NNN?" */
 793   if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node))))
 794     {
 795       /* If pkts aren't otherwise traced... */
 796       if ((node->flags & VLIB_NODE_FLAG_TRACE) == 0)
 797         {
 798           /* Trace them from here */
 799           node->flags |= VLIB_NODE_FLAG_TRACE;
 800           while (n_trace && n_left)
 801             {
 802               vlib_trace_buffer (vm, node, 0 /* next_index */ ,
 803                                  b[0], 0 /* follow chain */ );
 804               /*
 805                * Here we have a wireshark dissector problem.
 806                * Packets may be well-formed, or not. We
 807                * must not blow chunks in any case.
 808                *
 809                * Try to produce trace records which will help
 810                * folks understand what's going on.
 811                */
 812               drop_catchup_trace (vm, node, b[0]);
 813
 814               n_trace--;
 815               n_left--;
 816               b++;
 817             }
 818         }
 819
 820       vlib_set_trace_count (vm, node, n_trace);
 821       b = bufs;
 822       n_left = frame->n_vectors;
 823     }
 824
 825   if (node->flags & VLIB_NODE_FLAG_TRACE)
 826     interface_trace_buffers (vm, node, frame);
 827
 828   /* All going to drop regardless, this is just a counting exercise */
 829   clib_memset (nexts, 0, sizeof (nexts));
 830
 831   cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
 832                          (disposition == VNET_ERROR_DISPOSITION_PUNT
 833                           ? VNET_INTERFACE_COUNTER_PUNT
 834                           : VNET_INTERFACE_COUNTER_DROP));
 835
 836   /* collect the array of interfaces first ... */
 837   while (n_left >= 4)
 838     {
 839       if (n_left >= 12)
 840         {
 841           /* Prefetch 8 ahead - there's not much going on in each iteration */
 842           vlib_prefetch_buffer_header (b[4], LOAD);
 843           vlib_prefetch_buffer_header (b[5], LOAD);
 844           vlib_prefetch_buffer_header (b[6], LOAD);
 845           vlib_prefetch_buffer_header (b[7], LOAD);
 846         }
 847       sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
 848       sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_RX];
 849       sw_if_index[2] = vnet_buffer (b[2])->sw_if_index[VLIB_RX];
 850       sw_if_index[3] = vnet_buffer (b[3])->sw_if_index[VLIB_RX];
 851
 852       sw_if_index += 4;
 853       n_left -= 4;
 854       b += 4;
 855     }
 856   while (n_left)
 857     {
 858       sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
 859
 860       sw_if_index += 1;
 861       n_left -= 1;
 862       b += 1;
 863     }
 864
 865   /* ... then count against them in blocks */
 866   n_left = frame->n_vectors;
 867
 868   while (n_left)
 869     {
 870       vnet_sw_interface_t *sw_if0;
 871       u16 off, count;
 872
 873       off = frame->n_vectors - n_left;
 874
 875       sw_if_index = sw_if_indices + off;
 876
 877       count = clib_count_equal_u32 (sw_if_index, n_left);
 878       n_left -= count;
 879
 880       vlib_increment_simple_counter (cm, thread_index, sw_if_index[0], count);
 881
 882       /* Increment super-interface drop/punt counters for
 883          sub-interfaces. */
 884       sw_if0 = vnet_get_sw_interface (vnm, sw_if_index[0]);
 885       if (sw_if0->sup_sw_if_index != sw_if_index[0])
 886         vlib_increment_simple_counter
 887           (cm, thread_index, sw_if0->sup_sw_if_index, count);
 888     }
 889
 890   vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
 891
 892   return frame->n_vectors;
 893 }
 894
 895 static inline void
 896 pcap_drop_trace (vlib_main_t * vm,
 897                  vnet_interface_main_t * im,
 898                  vnet_pcap_t * pp, vlib_frame_t * f)
 899 {
 900   u32 *from;
 901   u32 n_left = f->n_vectors;
 902   vlib_buffer_t *b0, *p1;
 903   u32 bi0;
 904   i16 save_current_data;
 905   u16 save_current_length;
 906   vlib_error_main_t *em = &vm->error_main;
 907   int do_trace = 0;
 908
 909
 910   from = vlib_frame_vector_args (f);
 911
 912   while (n_left > 0)
 913     {
 914       if (PREDICT_TRUE (n_left > 1))
 915         {
 916           p1 = vlib_get_buffer (vm, from[1]);
 917           vlib_prefetch_buffer_header (p1, LOAD);
 918         }
 919
 920       bi0 = from[0];
 921       b0 = vlib_get_buffer (vm, bi0);
 922       from++;
 923       n_left--;
 924
 925       /* See if we're pointedly ignoring this specific error */
 926       if (im->pcap_drop_filter_hash
 927           && hash_get (im->pcap_drop_filter_hash, b0->error))
 928         continue;
 929
 930       do_trace = (pp->pcap_sw_if_index == 0) ||
 931         pp->pcap_sw_if_index == vnet_buffer (b0)->sw_if_index[VLIB_RX];
 932
 933       if (PREDICT_FALSE
 934           (do_trace == 0 && pp->filter_classify_table_index != ~0))
 935         {
 936           do_trace = vnet_is_packet_traced_inline
 937             (b0, pp->filter_classify_table_index, 0 /* full classify */ );
 938         }
 939
 940       /* Trace all drops, or drops received on a specific interface */
 941       if (do_trace)
 942         {
 943           save_current_data = b0->current_data;
 944           save_current_length = b0->current_length;
 945
 946           /*
 947            * Typically, we'll need to rewind the buffer
 948            * if l2_hdr_offset is valid, make sure to rewind to the start of
 949            * the L2 header. This may not be the buffer start in case we pop-ed
 950            * vlan tags.
 951            * Otherwise, rewind to buffer start and hope for the best.
 952            */
 953           if (b0->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
 954             {
 955               if (b0->current_data > vnet_buffer (b0)->l2_hdr_offset)
 956                 vlib_buffer_advance (b0,
 957                                      vnet_buffer (b0)->l2_hdr_offset -
 958                                      b0->current_data);
 959             }
 960           else if (b0->current_data > 0)
 961             vlib_buffer_advance (b0, (word) - b0->current_data);
 962
 963           {
 964             vlib_buffer_t *last = b0;
 965             u32 error_node_index;
 966             int drop_string_len;
 967             vlib_node_t *n;
 968             /* Length of the error string */
 969             int error_string_len =
 970               clib_strnlen (em->counters_heap[b0->error].name, 128);
 971
 972             /* Dig up the drop node */
 973             error_node_index = vm->node_main.node_by_error[b0->error];
 974             n = vlib_get_node (vm, error_node_index);
 975
 976             /* Length of full drop string, w/ "nodename: " prepended */
 977             drop_string_len = error_string_len + vec_len (n->name) + 2;
 978
 979             /* Find the last buffer in the chain */
 980             while (last->flags & VLIB_BUFFER_NEXT_PRESENT)
 981               last = vlib_get_buffer (vm, last->next_buffer);
 982
 983             /*
 984              * Append <nodename>: <error-string> to the capture,
 985              * only if we can do that without allocating a new buffer.
 986              */
 987             if (PREDICT_TRUE ((last->current_data + last->current_length)
 988                               < (VLIB_BUFFER_DEFAULT_DATA_SIZE
 989                                  - drop_string_len)))
 990               {
 991                 clib_memcpy_fast (last->data + last->current_data +
 992                                   last->current_length, n->name,
 993                                   vec_len (n->name));
 994                 clib_memcpy_fast (last->data + last->current_data +
 995                                   last->current_length + vec_len (n->name),
 996                                   ": ", 2);
 997                 clib_memcpy_fast (last->data + last->current_data +
 998                                   last->current_length + vec_len (n->name) +
 999                                   2, em->counters_heap[b0->error].name,
1000                                   error_string_len);
1001                 last->current_length += drop_string_len;
1002                 b0->flags &= ~(VLIB_BUFFER_TOTAL_LENGTH_VALID);
1003                 pcap_add_buffer (&pp->pcap_main, vm, bi0,
1004                                  pp->max_bytes_per_pkt);
1005                 last->current_length -= drop_string_len;
1006                 b0->current_data = save_current_data;
1007                 b0->current_length = save_current_length;
1008                 continue;
1009               }
1010           }
1011
1012           /*
1013            * Didn't have space in the last buffer, here's the dropped
1014            * packet as-is
1015            */
1016           pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
1017
1018           b0->current_data = save_current_data;
1019           b0->current_length = save_current_length;
1020         }
1021     }
1022 }
1023
1024 #ifndef CLIB_MARCH_VARIANT
1025 void
1026 vnet_pcap_drop_trace_filter_add_del (u32 error_index, int is_add)
1027 {
1028   vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1029
1030   if (im->pcap_drop_filter_hash == 0)
1031     im->pcap_drop_filter_hash = hash_create (0, sizeof (uword));
1032
1033   if (is_add)
1034     hash_set (im->pcap_drop_filter_hash, error_index, 1);
1035   else
1036     hash_unset (im->pcap_drop_filter_hash, error_index);
1037 }
1038 #endif /* CLIB_MARCH_VARIANT */
1039
1040 VLIB_NODE_FN (interface_drop) (vlib_main_t * vm,
1041                                vlib_node_runtime_t * node,
1042                                vlib_frame_t * frame)
1043 {
1044   vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1045   vnet_pcap_t *pp = &vlib_global_main.pcap;
1046
1047   if (PREDICT_FALSE (pp->pcap_drop_enable))
1048     pcap_drop_trace (vm, im, pp, frame);
1049
1050   return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_DROP);
1051 }
1052
1053 VLIB_NODE_FN (interface_punt) (vlib_main_t * vm,
1054                                vlib_node_runtime_t * node,
1055                                vlib_frame_t * frame)
1056 {
1057   return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_PUNT);
1058 }
1059
1060 /* *INDENT-OFF* */
1061 VLIB_REGISTER_NODE (interface_drop) = {
1062   .name = "error-drop",
1063   .vector_size = sizeof (u32),
1064   .format_trace = format_vnet_error_trace,
1065   .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1066   .n_next_nodes = 1,
1067   .next_nodes = {
1068     [0] = "drop",
1069   },
1070 };
1071 /* *INDENT-ON* */
1072
1073 /* *INDENT-OFF* */
1074 VLIB_REGISTER_NODE (interface_punt) = {
1075   .name = "error-punt",
1076   .vector_size = sizeof (u32),
1077   .format_trace = format_vnet_error_trace,
1078   .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1079   .n_next_nodes = 1,
1080   .next_nodes = {
1081     [0] = "punt",
1082   },
1083 };
1084 /* *INDENT-ON* */
1085
1086 /* *INDENT-OFF* */
1087 VLIB_REGISTER_NODE (vnet_per_buffer_interface_output_node) = {
1088   .name = "interface-output",
1089   .vector_size = sizeof (u32),
1090 };
1091 /* *INDENT-ON* */
1092
1093 static uword
1094 interface_tx_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1095                       vlib_frame_t * from_frame)
1096 {
1097   vnet_main_t *vnm = vnet_get_main ();
1098   u32 last_sw_if_index = ~0;
1099   vlib_frame_t *to_frame = 0;
1100   vnet_hw_interface_t *hw = 0;
1101   u32 *from, *to_next = 0;
1102   u32 n_left_from;
1103
1104   from = vlib_frame_vector_args (from_frame);
1105   n_left_from = from_frame->n_vectors;
1106   while (n_left_from > 0)
1107     {
1108       u32 bi0;
1109       vlib_buffer_t *b0;
1110       u32 sw_if_index0;
1111
1112       bi0 = from[0];
1113       from++;
1114       n_left_from--;
1115       b0 = vlib_get_buffer (vm, bi0);
1116       sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
1117
1118       if (PREDICT_FALSE ((last_sw_if_index != sw_if_index0) || to_frame == 0))
1119         {
1120           if (to_frame)
1121             {
1122               hw = vnet_get_sup_hw_interface (vnm, last_sw_if_index);
1123               vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
1124             }
1125           last_sw_if_index = sw_if_index0;
1126           hw = vnet_get_sup_hw_interface (vnm, sw_if_index0);
1127           to_frame = vlib_get_frame_to_node (vm, hw->tx_node_index);
1128           to_next = vlib_frame_vector_args (to_frame);
1129         }
1130
1131       to_next[0] = bi0;
1132       to_next++;
1133       to_frame->n_vectors++;
1134     }
1135   vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
1136   return from_frame->n_vectors;
1137 }
1138
1139 /* *INDENT-OFF* */
1140 VLIB_REGISTER_NODE (interface_tx) = {
1141   .function = interface_tx_node_fn,
1142   .name = "interface-tx",
1143   .vector_size = sizeof (u32),
1144   .n_next_nodes = 1,
1145   .next_nodes = {
1146     [0] = "error-drop",
1147   },
1148 };
1149
1150 VNET_FEATURE_ARC_INIT (interface_output, static) =
1151 {
1152   .arc_name  = "interface-output",
1153   .start_nodes = VNET_FEATURES (0),
1154   .last_in_arc = "interface-tx",
1155   .arc_index_ptr = &vnet_main.interface_main.output_feature_arc_index,
1156 };
1157
1158 VNET_FEATURE_INIT (span_tx, static) = {
1159   .arc_name = "interface-output",
1160   .node_name = "span-output",
1161   .runs_before = VNET_FEATURES ("interface-tx"),
1162 };
1163
1164 VNET_FEATURE_INIT (ipsec_if_tx, static) = {
1165   .arc_name = "interface-output",
1166   .node_name = "ipsec-if-output",
1167   .runs_before = VNET_FEATURES ("interface-tx"),
1168 };
1169
1170 VNET_FEATURE_INIT (interface_tx, static) = {
1171   .arc_name = "interface-output",
1172   .node_name = "interface-tx",
1173   .runs_before = 0,
1174 };
1175 /* *INDENT-ON* */
1176
1177 #ifndef CLIB_MARCH_VARIANT
1178 clib_error_t *
1179 vnet_per_buffer_interface_output_hw_interface_add_del (vnet_main_t * vnm,
1180                                                        u32 hw_if_index,
1181                                                        u32 is_create)
1182 {
1183   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1184   u32 next_index;
1185
1186   if (hi->output_node_index == 0)
1187     return 0;
1188
1189   next_index = vlib_node_add_next
1190     (vnm->vlib_main, vnet_per_buffer_interface_output_node.index,
1191      hi->output_node_index);
1192   hi->output_node_next_index = next_index;
1193
1194   return 0;
1195 }
1196
1197 VNET_HW_INTERFACE_ADD_DEL_FUNCTION
1198   (vnet_per_buffer_interface_output_hw_interface_add_del);
1199
1200 void
1201 vnet_set_interface_output_node (vnet_main_t * vnm,
1202                                 u32 hw_if_index, u32 node_index)
1203 {
1204   ASSERT (node_index);
1205   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1206   u32 next_index = vlib_node_add_next
1207     (vnm->vlib_main, vnet_per_buffer_interface_output_node.index, node_index);
1208   hi->output_node_next_index = next_index;
1209   hi->output_node_index = node_index;
1210 }
1211 #endif /* CLIB_MARCH_VARIANT */
1212
1213 /*
1214  * fd.io coding-style-patch-verification: ON
1215  *
1216  * Local Variables:
1217  * eval: (c-set-style "gnu")
1218  * End:
1219  */