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:
7 * http://www.apache.org/licenses/LICENSE-2.0
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.
16 * ethernet_node.c: ethernet packet processing
18 * Copyright (c) 2008 Eliot Dresselhaus
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:
28 * The above copyright notice and this permission notice shall be
29 * included in all copies or substantial portions of the Software.
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.
40 #include <vlib/vlib.h>
41 #include <vnet/pg/pg.h>
42 #include <vnet/ethernet/ethernet.h>
43 #include <vnet/ethernet/p2p_ethernet.h>
44 #include <vppinfra/sparse_vec.h>
45 #include <vnet/l2/l2_bvi.h>
48 #define foreach_ethernet_input_next \
49 _ (PUNT, "error-punt") \
50 _ (DROP, "error-drop") \
55 #define _(s,n) ETHERNET_INPUT_NEXT_##s,
56 foreach_ethernet_input_next
58 ETHERNET_INPUT_N_NEXT,
59 } ethernet_input_next_t;
64 } ethernet_input_trace_t;
67 format_ethernet_input_trace (u8 * s, va_list * va)
69 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
70 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
71 ethernet_input_trace_t *t = va_arg (*va, ethernet_input_trace_t *);
73 s = format (s, "%U", format_ethernet_header, t->packet_data);
78 vlib_node_registration_t ethernet_input_node;
82 ETHERNET_INPUT_VARIANT_ETHERNET,
83 ETHERNET_INPUT_VARIANT_ETHERNET_TYPE,
84 ETHERNET_INPUT_VARIANT_NOT_L2,
85 } ethernet_input_variant_t;
88 // Parse the ethernet header to extract vlan tags and innermost ethertype
89 static_always_inline void
90 parse_header (ethernet_input_variant_t variant,
94 u16 * outer_id, u16 * inner_id, u32 * match_flags)
98 if (variant == ETHERNET_INPUT_VARIANT_ETHERNET
99 || variant == ETHERNET_INPUT_VARIANT_NOT_L2)
101 ethernet_header_t *e0;
103 e0 = (void *) (b0->data + b0->current_data);
105 vnet_buffer (b0)->l2_hdr_offset = b0->current_data;
106 b0->flags |= VNET_BUFFER_F_L2_HDR_OFFSET_VALID;
108 vlib_buffer_advance (b0, sizeof (e0[0]));
110 *type = clib_net_to_host_u16 (e0->type);
112 else if (variant == ETHERNET_INPUT_VARIANT_ETHERNET_TYPE)
114 // here when prior node was LLC/SNAP processing
117 e0 = (void *) (b0->data + b0->current_data);
119 vlib_buffer_advance (b0, sizeof (e0[0]));
121 *type = clib_net_to_host_u16 (e0[0]);
124 // save for distinguishing between dot1q and dot1ad later
127 // default the tags to 0 (used if there is no corresponding tag)
131 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_0_TAG;
134 // check for vlan encaps
135 if (ethernet_frame_is_tagged (*type))
137 ethernet_vlan_header_t *h0;
140 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_1_TAG;
142 h0 = (void *) (b0->data + b0->current_data);
144 tag = clib_net_to_host_u16 (h0->priority_cfi_and_id);
146 *outer_id = tag & 0xfff;
148 *match_flags &= ~SUBINT_CONFIG_MATCH_1_TAG;
150 *type = clib_net_to_host_u16 (h0->type);
152 vlib_buffer_advance (b0, sizeof (h0[0]));
155 if (*type == ETHERNET_TYPE_VLAN)
157 // Double tagged packet
158 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_2_TAG;
160 h0 = (void *) (b0->data + b0->current_data);
162 tag = clib_net_to_host_u16 (h0->priority_cfi_and_id);
164 *inner_id = tag & 0xfff;
166 *type = clib_net_to_host_u16 (h0->type);
168 vlib_buffer_advance (b0, sizeof (h0[0]));
170 if (*type == ETHERNET_TYPE_VLAN)
172 // More than double tagged packet
173 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_3_TAG;
175 vlib_buffer_advance (b0, sizeof (h0[0]));
176 vlan_count = 3; // "unknown" number, aka, 3-or-more
180 ethernet_buffer_set_vlan_count (b0, vlan_count);
183 // Determine the subinterface for this packet, given the result of the
184 // vlan table lookups and vlan header parsing. Check the most specific
186 static_always_inline void
187 identify_subint (vnet_hw_interface_t * hi,
190 main_intf_t * main_intf,
191 vlan_intf_t * vlan_intf,
192 qinq_intf_t * qinq_intf,
193 u32 * new_sw_if_index, u8 * error0, u32 * is_l2)
197 matched = eth_identify_subint (hi, b0, match_flags,
198 main_intf, vlan_intf, qinq_intf,
199 new_sw_if_index, error0, is_l2);
204 // Perform L3 my-mac filter
205 // A unicast packet arriving on an L3 interface must have a dmac matching the interface mac.
206 // This is required for promiscuous mode, else we will forward packets we aren't supposed to.
209 ethernet_header_t *e0;
210 e0 = (void *) (b0->data + vnet_buffer (b0)->l2_hdr_offset);
212 if (!(ethernet_address_cast (e0->dst_address)))
214 if (!eth_mac_equal ((u8 *) e0, hi->hw_address))
216 *error0 = ETHERNET_ERROR_L3_MAC_MISMATCH;
221 // Check for down subinterface
222 *error0 = (*new_sw_if_index) != ~0 ? (*error0) : ETHERNET_ERROR_DOWN;
226 static_always_inline void
227 determine_next_node (ethernet_main_t * em,
228 ethernet_input_variant_t variant,
230 u32 type0, vlib_buffer_t * b0, u8 * error0, u8 * next0)
232 if (PREDICT_FALSE (*error0 != ETHERNET_ERROR_NONE))
234 // some error occurred
235 *next0 = ETHERNET_INPUT_NEXT_DROP;
239 *next0 = em->l2_next;
240 // record the L2 len and reset the buffer so the L2 header is preserved
241 u32 eth_start = vnet_buffer (b0)->l2_hdr_offset;
242 vnet_buffer (b0)->l2.l2_len = b0->current_data - eth_start;
243 ASSERT (vnet_buffer (b0)->l2.l2_len ==
244 ethernet_buffer_header_size (b0));
245 vlib_buffer_advance (b0, -ethernet_buffer_header_size (b0));
247 // check for common IP/MPLS ethertypes
249 else if (type0 == ETHERNET_TYPE_IP4)
251 *next0 = em->l3_next.input_next_ip4;
253 else if (type0 == ETHERNET_TYPE_IP6)
255 *next0 = em->l3_next.input_next_ip6;
257 else if (type0 == ETHERNET_TYPE_MPLS)
259 *next0 = em->l3_next.input_next_mpls;
262 else if (em->redirect_l3)
264 // L3 Redirect is on, the cached common next nodes will be
265 // pointing to the redirect node, catch the uncommon types here
266 *next0 = em->redirect_l3_next;
270 // uncommon ethertype, check table
272 i0 = sparse_vec_index (em->l3_next.input_next_by_type, type0);
273 *next0 = vec_elt (em->l3_next.input_next_by_type, i0);
276 SPARSE_VEC_INVALID_INDEX ? ETHERNET_ERROR_UNKNOWN_TYPE : *error0;
278 // The table is not populated with LLC values, so check that now.
279 // If variant is variant_ethernet then we came from LLC processing. Don't
280 // go back there; drop instead using by keeping the drop/bad table result.
281 if ((type0 < 0x600) && (variant == ETHERNET_INPUT_VARIANT_ETHERNET))
283 *next0 = ETHERNET_INPUT_NEXT_LLC;
288 static_always_inline int
289 ethernet_frame_is_any_tagged (u16 type0, u16 type1)
292 const __m128i ethertype_mask = _mm_set_epi16 (ETHERNET_TYPE_VLAN,
293 ETHERNET_TYPE_DOT1AD,
294 ETHERNET_TYPE_VLAN_9100,
295 ETHERNET_TYPE_VLAN_9200,
296 /* duplicate for type1 */
298 ETHERNET_TYPE_DOT1AD,
299 ETHERNET_TYPE_VLAN_9100,
300 ETHERNET_TYPE_VLAN_9200);
303 _mm_set_epi16 (type0, type0, type0, type0, type1, type1, type1, type1);
304 r = _mm_cmpeq_epi16 (ethertype_mask, r);
305 return !_mm_test_all_zeros (r, r);
307 return ethernet_frame_is_tagged (type0) || ethernet_frame_is_tagged (type1);
311 static_always_inline uword
312 ethernet_input_inline (vlib_main_t * vm,
313 vlib_node_runtime_t * node,
314 vlib_frame_t * from_frame,
315 ethernet_input_variant_t variant)
317 vnet_main_t *vnm = vnet_get_main ();
318 ethernet_main_t *em = ðernet_main;
319 vlib_node_runtime_t *error_node;
320 u32 n_left_from, next_index, *from, *to_next;
321 u32 stats_sw_if_index, stats_n_packets, stats_n_bytes;
322 u32 thread_index = vlib_get_thread_index ();
323 u32 cached_sw_if_index = ~0;
324 u32 cached_is_l2 = 0; /* shut up gcc */
325 vnet_hw_interface_t *hi = NULL; /* used for main interface only */
327 if (variant != ETHERNET_INPUT_VARIANT_ETHERNET)
328 error_node = vlib_node_get_runtime (vm, ethernet_input_node.index);
332 from = vlib_frame_vector_args (from_frame);
333 n_left_from = from_frame->n_vectors;
335 if (node->flags & VLIB_NODE_FLAG_TRACE)
336 vlib_trace_frame_buffers_only (vm, node,
340 sizeof (ethernet_input_trace_t));
342 next_index = node->cached_next_index;
343 stats_sw_if_index = node->runtime_data[0];
344 stats_n_packets = stats_n_bytes = 0;
346 while (n_left_from > 0)
350 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
352 while (n_left_from >= 4 && n_left_to_next >= 2)
355 vlib_buffer_t *b0, *b1;
356 u8 next0, next1, error0, error1;
357 u16 type0, orig_type0, type1, orig_type1;
358 u16 outer_id0, inner_id0, outer_id1, inner_id1;
359 u32 match_flags0, match_flags1;
360 u32 old_sw_if_index0, new_sw_if_index0, len0, old_sw_if_index1,
361 new_sw_if_index1, len1;
362 vnet_hw_interface_t *hi0, *hi1;
363 main_intf_t *main_intf0, *main_intf1;
364 vlan_intf_t *vlan_intf0, *vlan_intf1;
365 qinq_intf_t *qinq_intf0, *qinq_intf1;
367 ethernet_header_t *e0, *e1;
369 /* Prefetch next iteration. */
371 vlib_buffer_t *b2, *b3;
373 b2 = vlib_get_buffer (vm, from[2]);
374 b3 = vlib_get_buffer (vm, from[3]);
376 vlib_prefetch_buffer_header (b2, STORE);
377 vlib_prefetch_buffer_header (b3, STORE);
379 CLIB_PREFETCH (b2->data, sizeof (ethernet_header_t), LOAD);
380 CLIB_PREFETCH (b3->data, sizeof (ethernet_header_t), LOAD);
392 b0 = vlib_get_buffer (vm, bi0);
393 b1 = vlib_get_buffer (vm, bi1);
395 error0 = error1 = ETHERNET_ERROR_NONE;
396 e0 = vlib_buffer_get_current (b0);
397 type0 = clib_net_to_host_u16 (e0->type);
398 e1 = vlib_buffer_get_current (b1);
399 type1 = clib_net_to_host_u16 (e1->type);
401 /* Speed-path for the untagged case */
402 if (PREDICT_TRUE (variant == ETHERNET_INPUT_VARIANT_ETHERNET
403 && !ethernet_frame_is_any_tagged (type0, type1)))
406 subint_config_t *subint0;
407 u32 sw_if_index0, sw_if_index1;
409 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
410 sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
411 is_l20 = cached_is_l2;
413 /* This is probably wholly unnecessary */
414 if (PREDICT_FALSE (sw_if_index0 != sw_if_index1))
417 /* Now sw_if_index0 == sw_if_index1 */
418 if (PREDICT_FALSE (cached_sw_if_index != sw_if_index0))
420 cached_sw_if_index = sw_if_index0;
421 hi = vnet_get_sup_hw_interface (vnm, sw_if_index0);
422 intf0 = vec_elt_at_index (em->main_intfs, hi->hw_if_index);
423 subint0 = &intf0->untagged_subint;
424 cached_is_l2 = is_l20 = subint0->flags & SUBINT_CONFIG_L2;
427 vnet_buffer (b0)->l2_hdr_offset = b0->current_data;
428 vnet_buffer (b1)->l2_hdr_offset = b1->current_data;
429 vnet_buffer (b0)->l3_hdr_offset =
430 vnet_buffer (b0)->l2_hdr_offset + sizeof (ethernet_header_t);
431 vnet_buffer (b1)->l3_hdr_offset =
432 vnet_buffer (b1)->l2_hdr_offset + sizeof (ethernet_header_t);
433 b0->flags |= VNET_BUFFER_F_L2_HDR_OFFSET_VALID |
434 VNET_BUFFER_F_L3_HDR_OFFSET_VALID;
435 b1->flags |= VNET_BUFFER_F_L2_HDR_OFFSET_VALID |
436 VNET_BUFFER_F_L3_HDR_OFFSET_VALID;
438 if (PREDICT_TRUE (is_l20 != 0))
441 vnet_buffer (b0)->l2.l2_len = sizeof (ethernet_header_t);
443 vnet_buffer (b1)->l2.l2_len = sizeof (ethernet_header_t);
447 if (!ethernet_address_cast (e0->dst_address) &&
448 (hi->hw_address != 0) &&
449 !eth_mac_equal ((u8 *) e0, hi->hw_address))
450 error0 = ETHERNET_ERROR_L3_MAC_MISMATCH;
451 if (!ethernet_address_cast (e1->dst_address) &&
452 (hi->hw_address != 0) &&
453 !eth_mac_equal ((u8 *) e1, hi->hw_address))
454 error1 = ETHERNET_ERROR_L3_MAC_MISMATCH;
455 determine_next_node (em, variant, 0, type0, b0,
457 vlib_buffer_advance (b0, sizeof (ethernet_header_t));
458 determine_next_node (em, variant, 0, type1, b1,
460 vlib_buffer_advance (b1, sizeof (ethernet_header_t));
465 /* Slow-path for the tagged case */
467 parse_header (variant,
470 &orig_type0, &outer_id0, &inner_id0, &match_flags0);
472 parse_header (variant,
475 &orig_type1, &outer_id1, &inner_id1, &match_flags1);
477 old_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
478 old_sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
480 eth_vlan_table_lookups (em,
487 &main_intf0, &vlan_intf0, &qinq_intf0);
489 eth_vlan_table_lookups (em,
496 &main_intf1, &vlan_intf1, &qinq_intf1);
498 identify_subint (hi0,
503 qinq_intf0, &new_sw_if_index0, &error0, &is_l20);
505 identify_subint (hi1,
510 qinq_intf1, &new_sw_if_index1, &error1, &is_l21);
512 // Save RX sw_if_index for later nodes
513 vnet_buffer (b0)->sw_if_index[VLIB_RX] =
515 ETHERNET_ERROR_NONE ? old_sw_if_index0 : new_sw_if_index0;
516 vnet_buffer (b1)->sw_if_index[VLIB_RX] =
518 ETHERNET_ERROR_NONE ? old_sw_if_index1 : new_sw_if_index1;
520 // Check if there is a stat to take (valid and non-main sw_if_index for pkt 0 or pkt 1)
521 if (((new_sw_if_index0 != ~0)
522 && (new_sw_if_index0 != old_sw_if_index0))
523 || ((new_sw_if_index1 != ~0)
524 && (new_sw_if_index1 != old_sw_if_index1)))
527 len0 = vlib_buffer_length_in_chain (vm, b0) + b0->current_data
528 - vnet_buffer (b0)->l2_hdr_offset;
529 len1 = vlib_buffer_length_in_chain (vm, b1) + b1->current_data
530 - vnet_buffer (b1)->l2_hdr_offset;
532 stats_n_packets += 2;
533 stats_n_bytes += len0 + len1;
536 (!(new_sw_if_index0 == stats_sw_if_index
537 && new_sw_if_index1 == stats_sw_if_index)))
539 stats_n_packets -= 2;
540 stats_n_bytes -= len0 + len1;
542 if (new_sw_if_index0 != old_sw_if_index0
543 && new_sw_if_index0 != ~0)
544 vlib_increment_combined_counter (vnm->
545 interface_main.combined_sw_if_counters
547 VNET_INTERFACE_COUNTER_RX,
551 if (new_sw_if_index1 != old_sw_if_index1
552 && new_sw_if_index1 != ~0)
553 vlib_increment_combined_counter (vnm->
554 interface_main.combined_sw_if_counters
556 VNET_INTERFACE_COUNTER_RX,
561 if (new_sw_if_index0 == new_sw_if_index1)
563 if (stats_n_packets > 0)
565 vlib_increment_combined_counter
566 (vnm->interface_main.combined_sw_if_counters
567 + VNET_INTERFACE_COUNTER_RX,
570 stats_n_packets, stats_n_bytes);
571 stats_n_packets = stats_n_bytes = 0;
573 stats_sw_if_index = new_sw_if_index0;
578 if (variant == ETHERNET_INPUT_VARIANT_NOT_L2)
581 determine_next_node (em, variant, is_l20, type0, b0, &error0,
583 determine_next_node (em, variant, is_l21, type1, b1, &error1,
585 vnet_buffer (b0)->l3_hdr_offset = vnet_buffer (b0)->l2_hdr_offset +
586 vnet_buffer (b0)->l2.l2_len;
587 vnet_buffer (b1)->l3_hdr_offset = vnet_buffer (b1)->l2_hdr_offset +
588 vnet_buffer (b1)->l2.l2_len;
589 b0->flags |= VNET_BUFFER_F_L3_HDR_OFFSET_VALID;
590 b1->flags |= VNET_BUFFER_F_L3_HDR_OFFSET_VALID;
593 b0->error = error_node->errors[error0];
594 b1->error = error_node->errors[error1];
596 // verify speculative enqueue
597 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
598 n_left_to_next, bi0, bi1, next0,
602 while (n_left_from > 0 && n_left_to_next > 0)
607 u16 type0, orig_type0;
608 u16 outer_id0, inner_id0;
610 u32 old_sw_if_index0, new_sw_if_index0, len0;
611 vnet_hw_interface_t *hi0;
612 main_intf_t *main_intf0;
613 vlan_intf_t *vlan_intf0;
614 qinq_intf_t *qinq_intf0;
615 ethernet_header_t *e0;
618 // Prefetch next iteration
623 p2 = vlib_get_buffer (vm, from[1]);
624 vlib_prefetch_buffer_header (p2, STORE);
625 CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD);
635 b0 = vlib_get_buffer (vm, bi0);
637 error0 = ETHERNET_ERROR_NONE;
638 e0 = vlib_buffer_get_current (b0);
639 type0 = clib_net_to_host_u16 (e0->type);
641 /* Speed-path for the untagged case */
642 if (PREDICT_TRUE (variant == ETHERNET_INPUT_VARIANT_ETHERNET
643 && !ethernet_frame_is_tagged (type0)))
646 subint_config_t *subint0;
649 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
650 is_l20 = cached_is_l2;
652 if (PREDICT_FALSE (cached_sw_if_index != sw_if_index0))
654 cached_sw_if_index = sw_if_index0;
655 hi = vnet_get_sup_hw_interface (vnm, sw_if_index0);
656 intf0 = vec_elt_at_index (em->main_intfs, hi->hw_if_index);
657 subint0 = &intf0->untagged_subint;
658 cached_is_l2 = is_l20 = subint0->flags & SUBINT_CONFIG_L2;
661 vnet_buffer (b0)->l2_hdr_offset = b0->current_data;
662 vnet_buffer (b0)->l3_hdr_offset =
663 vnet_buffer (b0)->l2_hdr_offset + sizeof (ethernet_header_t);
664 b0->flags |= VNET_BUFFER_F_L2_HDR_OFFSET_VALID |
665 VNET_BUFFER_F_L3_HDR_OFFSET_VALID;
667 if (PREDICT_TRUE (is_l20 != 0))
670 vnet_buffer (b0)->l2.l2_len = sizeof (ethernet_header_t);
674 if (!ethernet_address_cast (e0->dst_address) &&
675 (hi->hw_address != 0) &&
676 !eth_mac_equal ((u8 *) e0, hi->hw_address))
677 error0 = ETHERNET_ERROR_L3_MAC_MISMATCH;
678 determine_next_node (em, variant, 0, type0, b0,
680 vlib_buffer_advance (b0, sizeof (ethernet_header_t));
685 /* Slow-path for the tagged case */
686 parse_header (variant,
689 &orig_type0, &outer_id0, &inner_id0, &match_flags0);
691 old_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
693 eth_vlan_table_lookups (em,
700 &main_intf0, &vlan_intf0, &qinq_intf0);
702 identify_subint (hi0,
707 qinq_intf0, &new_sw_if_index0, &error0, &is_l20);
709 // Save RX sw_if_index for later nodes
710 vnet_buffer (b0)->sw_if_index[VLIB_RX] =
712 ETHERNET_ERROR_NONE ? old_sw_if_index0 : new_sw_if_index0;
714 // Increment subinterface stats
715 // Note that interface-level counters have already been incremented
716 // prior to calling this function. Thus only subinterface counters
717 // are incremented here.
719 // Interface level counters include packets received on the main
720 // interface and all subinterfaces. Subinterface level counters
721 // include only those packets received on that subinterface
722 // Increment stats if the subint is valid and it is not the main intf
723 if ((new_sw_if_index0 != ~0)
724 && (new_sw_if_index0 != old_sw_if_index0))
727 len0 = vlib_buffer_length_in_chain (vm, b0) + b0->current_data
728 - vnet_buffer (b0)->l2_hdr_offset;
730 stats_n_packets += 1;
731 stats_n_bytes += len0;
733 // Batch stat increments from the same subinterface so counters
734 // don't need to be incremented for every packet.
735 if (PREDICT_FALSE (new_sw_if_index0 != stats_sw_if_index))
737 stats_n_packets -= 1;
738 stats_n_bytes -= len0;
740 if (new_sw_if_index0 != ~0)
741 vlib_increment_combined_counter
742 (vnm->interface_main.combined_sw_if_counters
743 + VNET_INTERFACE_COUNTER_RX,
744 thread_index, new_sw_if_index0, 1, len0);
745 if (stats_n_packets > 0)
747 vlib_increment_combined_counter
748 (vnm->interface_main.combined_sw_if_counters
749 + VNET_INTERFACE_COUNTER_RX,
751 stats_sw_if_index, stats_n_packets, stats_n_bytes);
752 stats_n_packets = stats_n_bytes = 0;
754 stats_sw_if_index = new_sw_if_index0;
758 if (variant == ETHERNET_INPUT_VARIANT_NOT_L2)
761 determine_next_node (em, variant, is_l20, type0, b0, &error0,
763 vnet_buffer (b0)->l3_hdr_offset = vnet_buffer (b0)->l2_hdr_offset +
764 vnet_buffer (b0)->l2.l2_len;
765 b0->flags |= VNET_BUFFER_F_L3_HDR_OFFSET_VALID;
768 b0->error = error_node->errors[error0];
770 // verify speculative enqueue
771 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
772 to_next, n_left_to_next,
776 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
779 // Increment any remaining batched stats
780 if (stats_n_packets > 0)
782 vlib_increment_combined_counter
783 (vnm->interface_main.combined_sw_if_counters
784 + VNET_INTERFACE_COUNTER_RX,
785 thread_index, stats_sw_if_index, stats_n_packets, stats_n_bytes);
786 node->runtime_data[0] = stats_sw_if_index;
789 return from_frame->n_vectors;
793 ethernet_input (vlib_main_t * vm,
794 vlib_node_runtime_t * node, vlib_frame_t * from_frame)
796 return ethernet_input_inline (vm, node, from_frame,
797 ETHERNET_INPUT_VARIANT_ETHERNET);
801 ethernet_input_type (vlib_main_t * vm,
802 vlib_node_runtime_t * node, vlib_frame_t * from_frame)
804 return ethernet_input_inline (vm, node, from_frame,
805 ETHERNET_INPUT_VARIANT_ETHERNET_TYPE);
809 ethernet_input_not_l2 (vlib_main_t * vm,
810 vlib_node_runtime_t * node, vlib_frame_t * from_frame)
812 return ethernet_input_inline (vm, node, from_frame,
813 ETHERNET_INPUT_VARIANT_NOT_L2);
817 // Return the subinterface config struct for the given sw_if_index
818 // Also return via parameter the appropriate match flags for the
819 // configured number of tags.
820 // On error (unsupported or not ethernet) return 0.
821 static subint_config_t *
822 ethernet_sw_interface_get_config (vnet_main_t * vnm,
824 u32 * flags, u32 * unsupported)
826 ethernet_main_t *em = ðernet_main;
827 vnet_hw_interface_t *hi;
828 vnet_sw_interface_t *si;
829 main_intf_t *main_intf;
830 vlan_table_t *vlan_table;
831 qinq_table_t *qinq_table;
832 subint_config_t *subint = 0;
834 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
836 if (!hi || (hi->hw_class_index != ethernet_hw_interface_class.index))
839 goto done; // non-ethernet interface
842 // ensure there's an entry for the main intf (shouldn't really be necessary)
843 vec_validate (em->main_intfs, hi->hw_if_index);
844 main_intf = vec_elt_at_index (em->main_intfs, hi->hw_if_index);
846 // Locate the subint for the given ethernet config
847 si = vnet_get_sw_interface (vnm, sw_if_index);
849 if (si->type == VNET_SW_INTERFACE_TYPE_P2P)
851 p2p_ethernet_main_t *p2pm = &p2p_main;
852 u32 p2pe_sw_if_index =
853 p2p_ethernet_lookup (hi->hw_if_index, si->p2p.client_mac);
854 if (p2pe_sw_if_index == ~0)
856 pool_get (p2pm->p2p_subif_pool, subint);
857 si->p2p.pool_index = subint - p2pm->p2p_subif_pool;
860 subint = vec_elt_at_index (p2pm->p2p_subif_pool, si->p2p.pool_index);
861 *flags = SUBINT_CONFIG_P2P;
863 else if (si->sub.eth.flags.default_sub)
865 subint = &main_intf->default_subint;
866 *flags = SUBINT_CONFIG_MATCH_0_TAG |
867 SUBINT_CONFIG_MATCH_1_TAG |
868 SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG;
870 else if ((si->sub.eth.flags.no_tags) || (si->sub.eth.raw_flags == 0))
872 // if no flags are set then this is a main interface
873 // so treat as untagged
874 subint = &main_intf->untagged_subint;
875 *flags = SUBINT_CONFIG_MATCH_0_TAG;
880 // first get the vlan table
881 if (si->sub.eth.flags.dot1ad)
883 if (main_intf->dot1ad_vlans == 0)
885 // Allocate a vlan table from the pool
886 pool_get (em->vlan_pool, vlan_table);
887 main_intf->dot1ad_vlans = vlan_table - em->vlan_pool;
891 // Get ptr to existing vlan table
893 vec_elt_at_index (em->vlan_pool, main_intf->dot1ad_vlans);
898 if (main_intf->dot1q_vlans == 0)
900 // Allocate a vlan table from the pool
901 pool_get (em->vlan_pool, vlan_table);
902 main_intf->dot1q_vlans = vlan_table - em->vlan_pool;
906 // Get ptr to existing vlan table
908 vec_elt_at_index (em->vlan_pool, main_intf->dot1q_vlans);
912 if (si->sub.eth.flags.one_tag)
914 *flags = si->sub.eth.flags.exact_match ?
915 SUBINT_CONFIG_MATCH_1_TAG :
916 (SUBINT_CONFIG_MATCH_1_TAG |
917 SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG);
919 if (si->sub.eth.flags.outer_vlan_id_any)
921 // not implemented yet
927 // a single vlan, a common case
929 &vlan_table->vlans[si->sub.eth.
930 outer_vlan_id].single_tag_subint;
937 *flags = si->sub.eth.flags.exact_match ?
938 SUBINT_CONFIG_MATCH_2_TAG :
939 (SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG);
941 if (si->sub.eth.flags.outer_vlan_id_any
942 && si->sub.eth.flags.inner_vlan_id_any)
944 // not implemented yet
949 if (si->sub.eth.flags.inner_vlan_id_any)
951 // a specific outer and "any" inner
952 // don't need a qinq table for this
954 &vlan_table->vlans[si->sub.eth.
955 outer_vlan_id].inner_any_subint;
956 if (si->sub.eth.flags.exact_match)
958 *flags = SUBINT_CONFIG_MATCH_2_TAG;
962 *flags = SUBINT_CONFIG_MATCH_2_TAG |
963 SUBINT_CONFIG_MATCH_3_TAG;
968 // a specific outer + specifc innner vlan id, a common case
970 // get the qinq table
971 if (vlan_table->vlans[si->sub.eth.outer_vlan_id].qinqs == 0)
973 // Allocate a qinq table from the pool
974 pool_get (em->qinq_pool, qinq_table);
975 vlan_table->vlans[si->sub.eth.outer_vlan_id].qinqs =
976 qinq_table - em->qinq_pool;
980 // Get ptr to existing qinq table
982 vec_elt_at_index (em->qinq_pool,
983 vlan_table->vlans[si->sub.
987 subint = &qinq_table->vlans[si->sub.eth.inner_vlan_id].subint;
997 ethernet_sw_interface_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
999 subint_config_t *subint;
1002 clib_error_t *error = 0;
1004 // Find the config for this subinterface
1006 ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags,
1011 // not implemented yet or not ethernet
1015 subint->sw_if_index =
1016 ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ? sw_if_index : ~0);
1022 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ethernet_sw_interface_up_down);
1025 // Set the L2/L3 mode for the subinterface
1027 ethernet_sw_interface_set_l2_mode (vnet_main_t * vnm, u32 sw_if_index, u32 l2)
1029 subint_config_t *subint;
1033 vnet_sw_interface_t *sw = vnet_get_sw_interface (vnm, sw_if_index);
1035 is_port = !(sw->type == VNET_SW_INTERFACE_TYPE_SUB);
1037 // Find the config for this subinterface
1039 ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags,
1044 // unimplemented or not ethernet
1048 // Double check that the config we found is for our interface (or the interface is down)
1049 ASSERT ((subint->sw_if_index == sw_if_index) | (subint->sw_if_index == ~0));
1053 subint->flags |= SUBINT_CONFIG_L2;
1056 SUBINT_CONFIG_MATCH_0_TAG | SUBINT_CONFIG_MATCH_1_TAG
1057 | SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG;
1061 subint->flags &= ~SUBINT_CONFIG_L2;
1064 ~(SUBINT_CONFIG_MATCH_1_TAG | SUBINT_CONFIG_MATCH_2_TAG
1065 | SUBINT_CONFIG_MATCH_3_TAG);
1073 * Set the L2/L3 mode for the subinterface regardless of port
1076 ethernet_sw_interface_set_l2_mode_noport (vnet_main_t * vnm,
1077 u32 sw_if_index, u32 l2)
1079 subint_config_t *subint;
1083 /* Find the config for this subinterface */
1085 ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags,
1090 /* unimplemented or not ethernet */
1095 * Double check that the config we found is for our interface (or the
1096 * interface is down)
1098 ASSERT ((subint->sw_if_index == sw_if_index) | (subint->sw_if_index == ~0));
1102 subint->flags |= SUBINT_CONFIG_L2;
1106 subint->flags &= ~SUBINT_CONFIG_L2;
1113 static clib_error_t *
1114 ethernet_sw_interface_add_del (vnet_main_t * vnm,
1115 u32 sw_if_index, u32 is_create)
1117 clib_error_t *error = 0;
1118 subint_config_t *subint;
1120 u32 unsupported = 0;
1122 // Find the config for this subinterface
1124 ethernet_sw_interface_get_config (vnm, sw_if_index, &match_flags,
1129 // not implemented yet or not ethernet
1132 // this is the NYI case
1133 error = clib_error_return (0, "not implemented yet");
1144 // Initialize the subint
1145 if (subint->flags & SUBINT_CONFIG_VALID)
1147 // Error vlan already in use
1148 error = clib_error_return (0, "vlan is already in use");
1152 // Note that config is L3 by defaulty
1153 subint->flags = SUBINT_CONFIG_VALID | match_flags;
1154 subint->sw_if_index = ~0; // because interfaces are initially down
1161 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ethernet_sw_interface_add_del);
1163 static char *ethernet_error_strings[] = {
1164 #define ethernet_error(n,c,s) s,
1165 #include "error.def"
1166 #undef ethernet_error
1170 VLIB_REGISTER_NODE (ethernet_input_node) = {
1171 .function = ethernet_input,
1172 .name = "ethernet-input",
1173 /* Takes a vector of packets. */
1174 .vector_size = sizeof (u32),
1175 .n_errors = ETHERNET_N_ERROR,
1176 .error_strings = ethernet_error_strings,
1177 .n_next_nodes = ETHERNET_INPUT_N_NEXT,
1179 #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
1180 foreach_ethernet_input_next
1183 .format_buffer = format_ethernet_header_with_length,
1184 .format_trace = format_ethernet_input_trace,
1185 .unformat_buffer = unformat_ethernet_header,
1190 VLIB_NODE_FUNCTION_MULTIARCH (ethernet_input_node, ethernet_input)
1194 VLIB_REGISTER_NODE (ethernet_input_type_node, static) = {
1195 .function = ethernet_input_type,
1196 .name = "ethernet-input-type",
1197 /* Takes a vector of packets. */
1198 .vector_size = sizeof (u32),
1199 .n_next_nodes = ETHERNET_INPUT_N_NEXT,
1201 #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
1202 foreach_ethernet_input_next
1209 VLIB_NODE_FUNCTION_MULTIARCH (ethernet_input_type_node, ethernet_input_type)
1213 VLIB_REGISTER_NODE (ethernet_input_not_l2_node, static) = {
1214 .function = ethernet_input_not_l2,
1215 .name = "ethernet-input-not-l2",
1216 /* Takes a vector of packets. */
1217 .vector_size = sizeof (u32),
1218 .n_next_nodes = ETHERNET_INPUT_N_NEXT,
1220 #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
1221 foreach_ethernet_input_next
1229 VLIB_NODE_FUNCTION_MULTIARCH (ethernet_input_not_l2_node,
1230 ethernet_input_not_l2)
1235 ethernet_set_rx_redirect (vnet_main_t * vnm,
1236 vnet_hw_interface_t * hi, u32 enable)
1238 // Insure all packets go to ethernet-input (i.e. untagged ipv4 packets
1239 // don't go directly to ip4-input)
1240 vnet_hw_interface_rx_redirect_to_node
1241 (vnm, hi->hw_if_index, enable ? ethernet_input_node.index : ~0);
1246 * Initialization and registration for the next_by_ethernet structure
1250 next_by_ethertype_init (next_by_ethertype_t * l3_next)
1252 l3_next->input_next_by_type = sparse_vec_new
1253 ( /* elt bytes */ sizeof (l3_next->input_next_by_type[0]),
1254 /* bits in index */ BITS (((ethernet_header_t *) 0)->type));
1256 vec_validate (l3_next->sparse_index_by_input_next_index,
1257 ETHERNET_INPUT_NEXT_DROP);
1258 vec_validate (l3_next->sparse_index_by_input_next_index,
1259 ETHERNET_INPUT_NEXT_PUNT);
1260 l3_next->sparse_index_by_input_next_index[ETHERNET_INPUT_NEXT_DROP] =
1261 SPARSE_VEC_INVALID_INDEX;
1262 l3_next->sparse_index_by_input_next_index[ETHERNET_INPUT_NEXT_PUNT] =
1263 SPARSE_VEC_INVALID_INDEX;
1266 * Make sure we don't wipe out an ethernet registration by mistake
1267 * Can happen if init function ordering constraints are missing.
1271 ethernet_main_t *em = ðernet_main;
1272 ASSERT (em->next_by_ethertype_register_called == 0);
1278 // Add an ethertype -> next index mapping to the structure
1280 next_by_ethertype_register (next_by_ethertype_t * l3_next,
1281 u32 ethertype, u32 next_index)
1285 ethernet_main_t *em = ðernet_main;
1289 ethernet_main_t *em = ðernet_main;
1290 em->next_by_ethertype_register_called = 1;
1293 /* Setup ethernet type -> next index sparse vector mapping. */
1294 n = sparse_vec_validate (l3_next->input_next_by_type, ethertype);
1297 /* Rebuild next index -> sparse index inverse mapping when sparse vector
1299 vec_validate (l3_next->sparse_index_by_input_next_index, next_index);
1300 for (i = 1; i < vec_len (l3_next->input_next_by_type); i++)
1302 sparse_index_by_input_next_index[l3_next->input_next_by_type[i]] = i;
1304 // do not allow the cached next index's to be updated if L3
1305 // redirect is enabled, as it will have overwritten them
1306 if (!em->redirect_l3)
1308 // Cache common ethertypes directly
1309 if (ethertype == ETHERNET_TYPE_IP4)
1311 l3_next->input_next_ip4 = next_index;
1313 else if (ethertype == ETHERNET_TYPE_IP6)
1315 l3_next->input_next_ip6 = next_index;
1317 else if (ethertype == ETHERNET_TYPE_MPLS)
1319 l3_next->input_next_mpls = next_index;
1326 static clib_error_t *
1327 ethernet_input_init (vlib_main_t * vm)
1329 ethernet_main_t *em = ðernet_main;
1330 __attribute__ ((unused)) vlan_table_t *invalid_vlan_table;
1331 __attribute__ ((unused)) qinq_table_t *invalid_qinq_table;
1333 ethernet_setup_node (vm, ethernet_input_node.index);
1334 ethernet_setup_node (vm, ethernet_input_type_node.index);
1335 ethernet_setup_node (vm, ethernet_input_not_l2_node.index);
1337 next_by_ethertype_init (&em->l3_next);
1339 // Initialize pools and vector for vlan parsing
1340 vec_validate (em->main_intfs, 10); // 10 main interfaces
1341 pool_alloc (em->vlan_pool, 10);
1342 pool_alloc (em->qinq_pool, 1);
1344 // The first vlan pool will always be reserved for an invalid table
1345 pool_get (em->vlan_pool, invalid_vlan_table); // first id = 0
1346 // The first qinq pool will always be reserved for an invalid table
1347 pool_get (em->qinq_pool, invalid_qinq_table); // first id = 0
1352 VLIB_INIT_FUNCTION (ethernet_input_init);
1355 ethernet_register_input_type (vlib_main_t * vm,
1356 ethernet_type_t type, u32 node_index)
1358 ethernet_main_t *em = ðernet_main;
1359 ethernet_type_info_t *ti;
1363 clib_error_t *error = vlib_call_init_function (vm, ethernet_init);
1365 clib_error_report (error);
1368 ti = ethernet_get_type_info (em, type);
1369 ti->node_index = node_index;
1370 ti->next_index = vlib_node_add_next (vm,
1371 ethernet_input_node.index, node_index);
1372 i = vlib_node_add_next (vm, ethernet_input_type_node.index, node_index);
1373 ASSERT (i == ti->next_index);
1375 i = vlib_node_add_next (vm, ethernet_input_not_l2_node.index, node_index);
1376 ASSERT (i == ti->next_index);
1378 // Add the L3 node for this ethertype to the next nodes structure
1379 next_by_ethertype_register (&em->l3_next, type, ti->next_index);
1381 // Call the registration functions for other nodes that want a mapping
1382 l2bvi_register_input_type (vm, type, node_index);
1386 ethernet_register_l2_input (vlib_main_t * vm, u32 node_index)
1388 ethernet_main_t *em = ðernet_main;
1392 vlib_node_add_next (vm, ethernet_input_node.index, node_index);
1395 * Even if we never use these arcs, we have to align the next indices...
1397 i = vlib_node_add_next (vm, ethernet_input_type_node.index, node_index);
1399 ASSERT (i == em->l2_next);
1401 i = vlib_node_add_next (vm, ethernet_input_not_l2_node.index, node_index);
1402 ASSERT (i == em->l2_next);
1405 // Register a next node for L3 redirect, and enable L3 redirect
1407 ethernet_register_l3_redirect (vlib_main_t * vm, u32 node_index)
1409 ethernet_main_t *em = ðernet_main;
1412 em->redirect_l3 = 1;
1413 em->redirect_l3_next = vlib_node_add_next (vm,
1414 ethernet_input_node.index,
1417 * Change the cached next nodes to the redirect node
1419 em->l3_next.input_next_ip4 = em->redirect_l3_next;
1420 em->l3_next.input_next_ip6 = em->redirect_l3_next;
1421 em->l3_next.input_next_mpls = em->redirect_l3_next;
1424 * Even if we never use these arcs, we have to align the next indices...
1426 i = vlib_node_add_next (vm, ethernet_input_type_node.index, node_index);
1428 ASSERT (i == em->redirect_l3_next);
1430 i = vlib_node_add_next (vm, ethernet_input_not_l2_node.index, node_index);
1432 ASSERT (i == em->redirect_l3_next);
1436 * fd.io coding-style-patch-verification: ON
1439 * eval: (c-set-style "gnu")