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 <vnet/devices/pipe/pipe.h>
45 #include <vppinfra/sparse_vec.h>
46 #include <vnet/l2/l2_bvi.h>
49 #define foreach_ethernet_input_next \
50 _ (PUNT, "error-punt") \
51 _ (DROP, "error-drop") \
56 #define _(s,n) ETHERNET_INPUT_NEXT_##s,
57 foreach_ethernet_input_next
59 ETHERNET_INPUT_N_NEXT,
60 } ethernet_input_next_t;
65 } ethernet_input_trace_t;
68 format_ethernet_input_trace (u8 * s, va_list * va)
70 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
71 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
72 ethernet_input_trace_t *t = va_arg (*va, ethernet_input_trace_t *);
74 s = format (s, "%U", format_ethernet_header, t->packet_data);
79 vlib_node_registration_t ethernet_input_node;
83 ETHERNET_INPUT_VARIANT_ETHERNET,
84 ETHERNET_INPUT_VARIANT_ETHERNET_TYPE,
85 ETHERNET_INPUT_VARIANT_NOT_L2,
86 } ethernet_input_variant_t;
89 // Parse the ethernet header to extract vlan tags and innermost ethertype
90 static_always_inline void
91 parse_header (ethernet_input_variant_t variant,
95 u16 * outer_id, u16 * inner_id, u32 * match_flags)
99 if (variant == ETHERNET_INPUT_VARIANT_ETHERNET
100 || variant == ETHERNET_INPUT_VARIANT_NOT_L2)
102 ethernet_header_t *e0;
104 e0 = (void *) (b0->data + b0->current_data);
106 vnet_buffer (b0)->l2_hdr_offset = b0->current_data;
107 b0->flags |= VNET_BUFFER_F_L2_HDR_OFFSET_VALID;
109 vlib_buffer_advance (b0, sizeof (e0[0]));
111 *type = clib_net_to_host_u16 (e0->type);
113 else if (variant == ETHERNET_INPUT_VARIANT_ETHERNET_TYPE)
115 // here when prior node was LLC/SNAP processing
118 e0 = (void *) (b0->data + b0->current_data);
120 vlib_buffer_advance (b0, sizeof (e0[0]));
122 *type = clib_net_to_host_u16 (e0[0]);
125 // save for distinguishing between dot1q and dot1ad later
128 // default the tags to 0 (used if there is no corresponding tag)
132 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_0_TAG;
135 // check for vlan encaps
136 if (ethernet_frame_is_tagged (*type))
138 ethernet_vlan_header_t *h0;
141 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_1_TAG;
143 h0 = (void *) (b0->data + b0->current_data);
145 tag = clib_net_to_host_u16 (h0->priority_cfi_and_id);
147 *outer_id = tag & 0xfff;
149 *match_flags &= ~SUBINT_CONFIG_MATCH_1_TAG;
151 *type = clib_net_to_host_u16 (h0->type);
153 vlib_buffer_advance (b0, sizeof (h0[0]));
156 if (*type == ETHERNET_TYPE_VLAN)
158 // Double tagged packet
159 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_2_TAG;
161 h0 = (void *) (b0->data + b0->current_data);
163 tag = clib_net_to_host_u16 (h0->priority_cfi_and_id);
165 *inner_id = tag & 0xfff;
167 *type = clib_net_to_host_u16 (h0->type);
169 vlib_buffer_advance (b0, sizeof (h0[0]));
171 if (*type == ETHERNET_TYPE_VLAN)
173 // More than double tagged packet
174 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_3_TAG;
176 vlib_buffer_advance (b0, sizeof (h0[0]));
177 vlan_count = 3; // "unknown" number, aka, 3-or-more
181 ethernet_buffer_set_vlan_count (b0, vlan_count);
184 // Determine the subinterface for this packet, given the result of the
185 // vlan table lookups and vlan header parsing. Check the most specific
187 static_always_inline void
188 identify_subint (vnet_hw_interface_t * hi,
191 main_intf_t * main_intf,
192 vlan_intf_t * vlan_intf,
193 qinq_intf_t * qinq_intf,
194 u32 * new_sw_if_index, u8 * error0, u32 * is_l2)
198 matched = eth_identify_subint (hi, b0, match_flags,
199 main_intf, vlan_intf, qinq_intf,
200 new_sw_if_index, error0, is_l2);
205 // Perform L3 my-mac filter
206 // A unicast packet arriving on an L3 interface must have a dmac matching the interface mac.
207 // This is required for promiscuous mode, else we will forward packets we aren't supposed to.
210 ethernet_header_t *e0;
211 e0 = (void *) (b0->data + vnet_buffer (b0)->l2_hdr_offset);
213 if (!(ethernet_address_cast (e0->dst_address)))
215 if (!eth_mac_equal ((u8 *) e0, hi->hw_address))
217 *error0 = ETHERNET_ERROR_L3_MAC_MISMATCH;
222 // Check for down subinterface
223 *error0 = (*new_sw_if_index) != ~0 ? (*error0) : ETHERNET_ERROR_DOWN;
227 static_always_inline void
228 determine_next_node (ethernet_main_t * em,
229 ethernet_input_variant_t variant,
231 u32 type0, vlib_buffer_t * b0, u8 * error0, u8 * next0)
233 if (PREDICT_FALSE (*error0 != ETHERNET_ERROR_NONE))
235 // some error occurred
236 *next0 = ETHERNET_INPUT_NEXT_DROP;
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 *next0 = em->l2_next;
244 ASSERT (vnet_buffer (b0)->l2.l2_len ==
245 ethernet_buffer_header_size (b0));
246 vlib_buffer_advance (b0, -ethernet_buffer_header_size (b0));
248 // check for common IP/MPLS ethertypes
250 else if (type0 == ETHERNET_TYPE_IP4)
252 *next0 = em->l3_next.input_next_ip4;
254 else if (type0 == ETHERNET_TYPE_IP6)
256 *next0 = em->l3_next.input_next_ip6;
258 else if (type0 == ETHERNET_TYPE_MPLS)
260 *next0 = em->l3_next.input_next_mpls;
263 else if (em->redirect_l3)
265 // L3 Redirect is on, the cached common next nodes will be
266 // pointing to the redirect node, catch the uncommon types here
267 *next0 = em->redirect_l3_next;
271 // uncommon ethertype, check table
273 i0 = sparse_vec_index (em->l3_next.input_next_by_type, type0);
274 *next0 = vec_elt (em->l3_next.input_next_by_type, i0);
277 SPARSE_VEC_INVALID_INDEX ? ETHERNET_ERROR_UNKNOWN_TYPE : *error0;
279 // The table is not populated with LLC values, so check that now.
280 // If variant is variant_ethernet then we came from LLC processing. Don't
281 // go back there; drop instead using by keeping the drop/bad table result.
282 if ((type0 < 0x600) && (variant == ETHERNET_INPUT_VARIANT_ETHERNET))
284 *next0 = ETHERNET_INPUT_NEXT_LLC;
289 static_always_inline uword
290 ethernet_input_inline (vlib_main_t * vm,
291 vlib_node_runtime_t * node,
292 vlib_frame_t * from_frame,
293 ethernet_input_variant_t variant)
295 vnet_main_t *vnm = vnet_get_main ();
296 ethernet_main_t *em = ðernet_main;
297 vlib_node_runtime_t *error_node;
298 u32 n_left_from, next_index, *from, *to_next;
299 u32 stats_sw_if_index, stats_n_packets, stats_n_bytes;
300 u32 thread_index = vm->thread_index;
301 u32 cached_sw_if_index = ~0;
302 u32 cached_is_l2 = 0; /* shut up gcc */
303 vnet_hw_interface_t *hi = NULL; /* used for main interface only */
305 if (variant != ETHERNET_INPUT_VARIANT_ETHERNET)
306 error_node = vlib_node_get_runtime (vm, ethernet_input_node.index);
310 from = vlib_frame_vector_args (from_frame);
311 n_left_from = from_frame->n_vectors;
313 if (node->flags & VLIB_NODE_FLAG_TRACE)
314 vlib_trace_frame_buffers_only (vm, node,
318 sizeof (ethernet_input_trace_t));
320 next_index = node->cached_next_index;
321 stats_sw_if_index = node->runtime_data[0];
322 stats_n_packets = stats_n_bytes = 0;
324 while (n_left_from > 0)
328 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
330 while (n_left_from >= 4 && n_left_to_next >= 2)
333 vlib_buffer_t *b0, *b1;
334 u8 next0, next1, error0, error1;
335 u16 type0, orig_type0, type1, orig_type1;
336 u16 outer_id0, inner_id0, outer_id1, inner_id1;
337 u32 match_flags0, match_flags1;
338 u32 old_sw_if_index0, new_sw_if_index0, len0, old_sw_if_index1,
339 new_sw_if_index1, len1;
340 vnet_hw_interface_t *hi0, *hi1;
341 main_intf_t *main_intf0, *main_intf1;
342 vlan_intf_t *vlan_intf0, *vlan_intf1;
343 qinq_intf_t *qinq_intf0, *qinq_intf1;
345 ethernet_header_t *e0, *e1;
347 /* Prefetch next iteration. */
349 vlib_buffer_t *b2, *b3;
351 b2 = vlib_get_buffer (vm, from[2]);
352 b3 = vlib_get_buffer (vm, from[3]);
354 vlib_prefetch_buffer_header (b2, STORE);
355 vlib_prefetch_buffer_header (b3, STORE);
357 CLIB_PREFETCH (b2->data, sizeof (ethernet_header_t), LOAD);
358 CLIB_PREFETCH (b3->data, sizeof (ethernet_header_t), LOAD);
370 b0 = vlib_get_buffer (vm, bi0);
371 b1 = vlib_get_buffer (vm, bi1);
373 error0 = error1 = ETHERNET_ERROR_NONE;
374 e0 = vlib_buffer_get_current (b0);
375 type0 = clib_net_to_host_u16 (e0->type);
376 e1 = vlib_buffer_get_current (b1);
377 type1 = clib_net_to_host_u16 (e1->type);
379 /* Speed-path for the untagged case */
380 if (PREDICT_TRUE (variant == ETHERNET_INPUT_VARIANT_ETHERNET
381 && !ethernet_frame_is_any_tagged_x2 (type0,
385 subint_config_t *subint0;
386 u32 sw_if_index0, sw_if_index1;
388 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
389 sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
390 is_l20 = cached_is_l2;
392 /* This is probably wholly unnecessary */
393 if (PREDICT_FALSE (sw_if_index0 != sw_if_index1))
396 /* Now sw_if_index0 == sw_if_index1 */
397 if (PREDICT_FALSE (cached_sw_if_index != sw_if_index0))
399 cached_sw_if_index = sw_if_index0;
400 hi = vnet_get_sup_hw_interface (vnm, sw_if_index0);
401 intf0 = vec_elt_at_index (em->main_intfs, hi->hw_if_index);
402 subint0 = &intf0->untagged_subint;
403 cached_is_l2 = is_l20 = subint0->flags & SUBINT_CONFIG_L2;
406 vnet_buffer (b0)->l2_hdr_offset = b0->current_data;
407 vnet_buffer (b1)->l2_hdr_offset = b1->current_data;
408 vnet_buffer (b0)->l3_hdr_offset =
409 vnet_buffer (b0)->l2_hdr_offset + sizeof (ethernet_header_t);
410 vnet_buffer (b1)->l3_hdr_offset =
411 vnet_buffer (b1)->l2_hdr_offset + sizeof (ethernet_header_t);
412 b0->flags |= VNET_BUFFER_F_L2_HDR_OFFSET_VALID |
413 VNET_BUFFER_F_L3_HDR_OFFSET_VALID;
414 b1->flags |= VNET_BUFFER_F_L2_HDR_OFFSET_VALID |
415 VNET_BUFFER_F_L3_HDR_OFFSET_VALID;
417 if (PREDICT_TRUE (is_l20 != 0))
420 vnet_buffer (b0)->l2.l2_len = sizeof (ethernet_header_t);
422 vnet_buffer (b1)->l2.l2_len = sizeof (ethernet_header_t);
426 if (!ethernet_address_cast (e0->dst_address) &&
427 (hi->hw_address != 0) &&
428 !eth_mac_equal ((u8 *) e0, hi->hw_address))
429 error0 = ETHERNET_ERROR_L3_MAC_MISMATCH;
430 if (!ethernet_address_cast (e1->dst_address) &&
431 (hi->hw_address != 0) &&
432 !eth_mac_equal ((u8 *) e1, hi->hw_address))
433 error1 = ETHERNET_ERROR_L3_MAC_MISMATCH;
434 vlib_buffer_advance (b0, sizeof (ethernet_header_t));
435 determine_next_node (em, variant, 0, type0, b0,
437 vlib_buffer_advance (b1, sizeof (ethernet_header_t));
438 determine_next_node (em, variant, 0, type1, b1,
444 /* Slow-path for the tagged case */
446 parse_header (variant,
449 &orig_type0, &outer_id0, &inner_id0, &match_flags0);
451 parse_header (variant,
454 &orig_type1, &outer_id1, &inner_id1, &match_flags1);
456 old_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
457 old_sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
459 eth_vlan_table_lookups (em,
466 &main_intf0, &vlan_intf0, &qinq_intf0);
468 eth_vlan_table_lookups (em,
475 &main_intf1, &vlan_intf1, &qinq_intf1);
477 identify_subint (hi0,
482 qinq_intf0, &new_sw_if_index0, &error0, &is_l20);
484 identify_subint (hi1,
489 qinq_intf1, &new_sw_if_index1, &error1, &is_l21);
491 // Save RX sw_if_index for later nodes
492 vnet_buffer (b0)->sw_if_index[VLIB_RX] =
494 ETHERNET_ERROR_NONE ? old_sw_if_index0 : new_sw_if_index0;
495 vnet_buffer (b1)->sw_if_index[VLIB_RX] =
497 ETHERNET_ERROR_NONE ? old_sw_if_index1 : new_sw_if_index1;
499 // Check if there is a stat to take (valid and non-main sw_if_index for pkt 0 or pkt 1)
500 if (((new_sw_if_index0 != ~0)
501 && (new_sw_if_index0 != old_sw_if_index0))
502 || ((new_sw_if_index1 != ~0)
503 && (new_sw_if_index1 != old_sw_if_index1)))
506 len0 = vlib_buffer_length_in_chain (vm, b0) + b0->current_data
507 - vnet_buffer (b0)->l2_hdr_offset;
508 len1 = vlib_buffer_length_in_chain (vm, b1) + b1->current_data
509 - vnet_buffer (b1)->l2_hdr_offset;
511 stats_n_packets += 2;
512 stats_n_bytes += len0 + len1;
515 (!(new_sw_if_index0 == stats_sw_if_index
516 && new_sw_if_index1 == stats_sw_if_index)))
518 stats_n_packets -= 2;
519 stats_n_bytes -= len0 + len1;
521 if (new_sw_if_index0 != old_sw_if_index0
522 && new_sw_if_index0 != ~0)
523 vlib_increment_combined_counter (vnm->
524 interface_main.combined_sw_if_counters
526 VNET_INTERFACE_COUNTER_RX,
530 if (new_sw_if_index1 != old_sw_if_index1
531 && new_sw_if_index1 != ~0)
532 vlib_increment_combined_counter (vnm->
533 interface_main.combined_sw_if_counters
535 VNET_INTERFACE_COUNTER_RX,
540 if (new_sw_if_index0 == new_sw_if_index1)
542 if (stats_n_packets > 0)
544 vlib_increment_combined_counter
545 (vnm->interface_main.combined_sw_if_counters
546 + VNET_INTERFACE_COUNTER_RX,
549 stats_n_packets, stats_n_bytes);
550 stats_n_packets = stats_n_bytes = 0;
552 stats_sw_if_index = new_sw_if_index0;
557 if (variant == ETHERNET_INPUT_VARIANT_NOT_L2)
560 determine_next_node (em, variant, is_l20, type0, b0, &error0,
562 determine_next_node (em, variant, is_l21, type1, b1, &error1,
564 vnet_buffer (b0)->l3_hdr_offset = vnet_buffer (b0)->l2_hdr_offset +
565 vnet_buffer (b0)->l2.l2_len;
566 vnet_buffer (b1)->l3_hdr_offset = vnet_buffer (b1)->l2_hdr_offset +
567 vnet_buffer (b1)->l2.l2_len;
568 b0->flags |= VNET_BUFFER_F_L3_HDR_OFFSET_VALID;
569 b1->flags |= VNET_BUFFER_F_L3_HDR_OFFSET_VALID;
572 b0->error = error_node->errors[error0];
573 b1->error = error_node->errors[error1];
575 // verify speculative enqueue
576 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
577 n_left_to_next, bi0, bi1, next0,
581 while (n_left_from > 0 && n_left_to_next > 0)
586 u16 type0, orig_type0;
587 u16 outer_id0, inner_id0;
589 u32 old_sw_if_index0, new_sw_if_index0, len0;
590 vnet_hw_interface_t *hi0;
591 main_intf_t *main_intf0;
592 vlan_intf_t *vlan_intf0;
593 qinq_intf_t *qinq_intf0;
594 ethernet_header_t *e0;
597 // Prefetch next iteration
602 p2 = vlib_get_buffer (vm, from[1]);
603 vlib_prefetch_buffer_header (p2, STORE);
604 CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD);
614 b0 = vlib_get_buffer (vm, bi0);
616 error0 = ETHERNET_ERROR_NONE;
617 e0 = vlib_buffer_get_current (b0);
618 type0 = clib_net_to_host_u16 (e0->type);
620 /* Speed-path for the untagged case */
621 if (PREDICT_TRUE (variant == ETHERNET_INPUT_VARIANT_ETHERNET
622 && !ethernet_frame_is_tagged (type0)))
625 subint_config_t *subint0;
628 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
629 is_l20 = cached_is_l2;
631 if (PREDICT_FALSE (cached_sw_if_index != sw_if_index0))
633 cached_sw_if_index = sw_if_index0;
634 hi = vnet_get_sup_hw_interface (vnm, sw_if_index0);
635 intf0 = vec_elt_at_index (em->main_intfs, hi->hw_if_index);
636 subint0 = &intf0->untagged_subint;
637 cached_is_l2 = is_l20 = subint0->flags & SUBINT_CONFIG_L2;
640 vnet_buffer (b0)->l2_hdr_offset = b0->current_data;
641 vnet_buffer (b0)->l3_hdr_offset =
642 vnet_buffer (b0)->l2_hdr_offset + sizeof (ethernet_header_t);
643 b0->flags |= VNET_BUFFER_F_L2_HDR_OFFSET_VALID |
644 VNET_BUFFER_F_L3_HDR_OFFSET_VALID;
646 if (PREDICT_TRUE (is_l20 != 0))
649 vnet_buffer (b0)->l2.l2_len = sizeof (ethernet_header_t);
653 if (!ethernet_address_cast (e0->dst_address) &&
654 (hi->hw_address != 0) &&
655 !eth_mac_equal ((u8 *) e0, hi->hw_address))
656 error0 = ETHERNET_ERROR_L3_MAC_MISMATCH;
657 determine_next_node (em, variant, 0, type0, b0,
659 vlib_buffer_advance (b0, sizeof (ethernet_header_t));
664 /* Slow-path for the tagged case */
665 parse_header (variant,
668 &orig_type0, &outer_id0, &inner_id0, &match_flags0);
670 old_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
672 eth_vlan_table_lookups (em,
679 &main_intf0, &vlan_intf0, &qinq_intf0);
681 identify_subint (hi0,
686 qinq_intf0, &new_sw_if_index0, &error0, &is_l20);
688 // Save RX sw_if_index for later nodes
689 vnet_buffer (b0)->sw_if_index[VLIB_RX] =
691 ETHERNET_ERROR_NONE ? old_sw_if_index0 : new_sw_if_index0;
693 // Increment subinterface stats
694 // Note that interface-level counters have already been incremented
695 // prior to calling this function. Thus only subinterface counters
696 // are incremented here.
698 // Interface level counters include packets received on the main
699 // interface and all subinterfaces. Subinterface level counters
700 // include only those packets received on that subinterface
701 // Increment stats if the subint is valid and it is not the main intf
702 if ((new_sw_if_index0 != ~0)
703 && (new_sw_if_index0 != old_sw_if_index0))
706 len0 = vlib_buffer_length_in_chain (vm, b0) + b0->current_data
707 - vnet_buffer (b0)->l2_hdr_offset;
709 stats_n_packets += 1;
710 stats_n_bytes += len0;
712 // Batch stat increments from the same subinterface so counters
713 // don't need to be incremented for every packet.
714 if (PREDICT_FALSE (new_sw_if_index0 != stats_sw_if_index))
716 stats_n_packets -= 1;
717 stats_n_bytes -= len0;
719 if (new_sw_if_index0 != ~0)
720 vlib_increment_combined_counter
721 (vnm->interface_main.combined_sw_if_counters
722 + VNET_INTERFACE_COUNTER_RX,
723 thread_index, new_sw_if_index0, 1, len0);
724 if (stats_n_packets > 0)
726 vlib_increment_combined_counter
727 (vnm->interface_main.combined_sw_if_counters
728 + VNET_INTERFACE_COUNTER_RX,
730 stats_sw_if_index, stats_n_packets, stats_n_bytes);
731 stats_n_packets = stats_n_bytes = 0;
733 stats_sw_if_index = new_sw_if_index0;
737 if (variant == ETHERNET_INPUT_VARIANT_NOT_L2)
740 determine_next_node (em, variant, is_l20, type0, b0, &error0,
742 vnet_buffer (b0)->l3_hdr_offset = vnet_buffer (b0)->l2_hdr_offset +
743 vnet_buffer (b0)->l2.l2_len;
744 b0->flags |= VNET_BUFFER_F_L3_HDR_OFFSET_VALID;
747 b0->error = error_node->errors[error0];
749 // verify speculative enqueue
750 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
751 to_next, n_left_to_next,
755 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
758 // Increment any remaining batched stats
759 if (stats_n_packets > 0)
761 vlib_increment_combined_counter
762 (vnm->interface_main.combined_sw_if_counters
763 + VNET_INTERFACE_COUNTER_RX,
764 thread_index, stats_sw_if_index, stats_n_packets, stats_n_bytes);
765 node->runtime_data[0] = stats_sw_if_index;
768 return from_frame->n_vectors;
772 ethernet_input (vlib_main_t * vm,
773 vlib_node_runtime_t * node, vlib_frame_t * from_frame)
775 return ethernet_input_inline (vm, node, from_frame,
776 ETHERNET_INPUT_VARIANT_ETHERNET);
780 ethernet_input_type (vlib_main_t * vm,
781 vlib_node_runtime_t * node, vlib_frame_t * from_frame)
783 return ethernet_input_inline (vm, node, from_frame,
784 ETHERNET_INPUT_VARIANT_ETHERNET_TYPE);
788 ethernet_input_not_l2 (vlib_main_t * vm,
789 vlib_node_runtime_t * node, vlib_frame_t * from_frame)
791 return ethernet_input_inline (vm, node, from_frame,
792 ETHERNET_INPUT_VARIANT_NOT_L2);
796 // Return the subinterface config struct for the given sw_if_index
797 // Also return via parameter the appropriate match flags for the
798 // configured number of tags.
799 // On error (unsupported or not ethernet) return 0.
800 static subint_config_t *
801 ethernet_sw_interface_get_config (vnet_main_t * vnm,
803 u32 * flags, u32 * unsupported)
805 ethernet_main_t *em = ðernet_main;
806 vnet_hw_interface_t *hi;
807 vnet_sw_interface_t *si;
808 main_intf_t *main_intf;
809 vlan_table_t *vlan_table;
810 qinq_table_t *qinq_table;
811 subint_config_t *subint = 0;
813 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
815 if (!hi || (hi->hw_class_index != ethernet_hw_interface_class.index))
818 goto done; // non-ethernet interface
821 // ensure there's an entry for the main intf (shouldn't really be necessary)
822 vec_validate (em->main_intfs, hi->hw_if_index);
823 main_intf = vec_elt_at_index (em->main_intfs, hi->hw_if_index);
825 // Locate the subint for the given ethernet config
826 si = vnet_get_sw_interface (vnm, sw_if_index);
828 if (si->type == VNET_SW_INTERFACE_TYPE_P2P)
830 p2p_ethernet_main_t *p2pm = &p2p_main;
831 u32 p2pe_sw_if_index =
832 p2p_ethernet_lookup (hi->hw_if_index, si->p2p.client_mac);
833 if (p2pe_sw_if_index == ~0)
835 pool_get (p2pm->p2p_subif_pool, subint);
836 si->p2p.pool_index = subint - p2pm->p2p_subif_pool;
839 subint = vec_elt_at_index (p2pm->p2p_subif_pool, si->p2p.pool_index);
840 *flags = SUBINT_CONFIG_P2P;
842 else if (si->type == VNET_SW_INTERFACE_TYPE_PIPE)
846 pipe = pipe_get (sw_if_index);
847 subint = &pipe->subint;
848 *flags = SUBINT_CONFIG_P2P;
850 else if (si->sub.eth.flags.default_sub)
852 subint = &main_intf->default_subint;
853 *flags = SUBINT_CONFIG_MATCH_0_TAG |
854 SUBINT_CONFIG_MATCH_1_TAG |
855 SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG;
857 else if ((si->sub.eth.flags.no_tags) || (si->sub.eth.raw_flags == 0))
859 // if no flags are set then this is a main interface
860 // so treat as untagged
861 subint = &main_intf->untagged_subint;
862 *flags = SUBINT_CONFIG_MATCH_0_TAG;
867 // first get the vlan table
868 if (si->sub.eth.flags.dot1ad)
870 if (main_intf->dot1ad_vlans == 0)
872 // Allocate a vlan table from the pool
873 pool_get (em->vlan_pool, vlan_table);
874 main_intf->dot1ad_vlans = vlan_table - em->vlan_pool;
878 // Get ptr to existing vlan table
880 vec_elt_at_index (em->vlan_pool, main_intf->dot1ad_vlans);
885 if (main_intf->dot1q_vlans == 0)
887 // Allocate a vlan table from the pool
888 pool_get (em->vlan_pool, vlan_table);
889 main_intf->dot1q_vlans = vlan_table - em->vlan_pool;
893 // Get ptr to existing vlan table
895 vec_elt_at_index (em->vlan_pool, main_intf->dot1q_vlans);
899 if (si->sub.eth.flags.one_tag)
901 *flags = si->sub.eth.flags.exact_match ?
902 SUBINT_CONFIG_MATCH_1_TAG :
903 (SUBINT_CONFIG_MATCH_1_TAG |
904 SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG);
906 if (si->sub.eth.flags.outer_vlan_id_any)
908 // not implemented yet
914 // a single vlan, a common case
916 &vlan_table->vlans[si->sub.eth.
917 outer_vlan_id].single_tag_subint;
924 *flags = si->sub.eth.flags.exact_match ?
925 SUBINT_CONFIG_MATCH_2_TAG :
926 (SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG);
928 if (si->sub.eth.flags.outer_vlan_id_any
929 && si->sub.eth.flags.inner_vlan_id_any)
931 // not implemented yet
936 if (si->sub.eth.flags.inner_vlan_id_any)
938 // a specific outer and "any" inner
939 // don't need a qinq table for this
941 &vlan_table->vlans[si->sub.eth.
942 outer_vlan_id].inner_any_subint;
943 if (si->sub.eth.flags.exact_match)
945 *flags = SUBINT_CONFIG_MATCH_2_TAG;
949 *flags = SUBINT_CONFIG_MATCH_2_TAG |
950 SUBINT_CONFIG_MATCH_3_TAG;
955 // a specific outer + specifc innner vlan id, a common case
957 // get the qinq table
958 if (vlan_table->vlans[si->sub.eth.outer_vlan_id].qinqs == 0)
960 // Allocate a qinq table from the pool
961 pool_get (em->qinq_pool, qinq_table);
962 vlan_table->vlans[si->sub.eth.outer_vlan_id].qinqs =
963 qinq_table - em->qinq_pool;
967 // Get ptr to existing qinq table
969 vec_elt_at_index (em->qinq_pool,
970 vlan_table->vlans[si->sub.
974 subint = &qinq_table->vlans[si->sub.eth.inner_vlan_id].subint;
984 ethernet_sw_interface_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
986 subint_config_t *subint;
989 clib_error_t *error = 0;
991 // Find the config for this subinterface
993 ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags,
998 // not implemented yet or not ethernet
1002 subint->sw_if_index =
1003 ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ? sw_if_index : ~0);
1009 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ethernet_sw_interface_up_down);
1012 // Set the L2/L3 mode for the subinterface
1014 ethernet_sw_interface_set_l2_mode (vnet_main_t * vnm, u32 sw_if_index, u32 l2)
1016 subint_config_t *subint;
1020 vnet_sw_interface_t *sw = vnet_get_sw_interface (vnm, sw_if_index);
1022 is_port = !(sw->type == VNET_SW_INTERFACE_TYPE_SUB);
1024 // Find the config for this subinterface
1026 ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags,
1031 // unimplemented or not ethernet
1035 // Double check that the config we found is for our interface (or the interface is down)
1036 ASSERT ((subint->sw_if_index == sw_if_index) | (subint->sw_if_index == ~0));
1040 subint->flags |= SUBINT_CONFIG_L2;
1043 SUBINT_CONFIG_MATCH_0_TAG | SUBINT_CONFIG_MATCH_1_TAG
1044 | SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG;
1048 subint->flags &= ~SUBINT_CONFIG_L2;
1051 ~(SUBINT_CONFIG_MATCH_1_TAG | SUBINT_CONFIG_MATCH_2_TAG
1052 | SUBINT_CONFIG_MATCH_3_TAG);
1060 * Set the L2/L3 mode for the subinterface regardless of port
1063 ethernet_sw_interface_set_l2_mode_noport (vnet_main_t * vnm,
1064 u32 sw_if_index, u32 l2)
1066 subint_config_t *subint;
1070 /* Find the config for this subinterface */
1072 ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags,
1077 /* unimplemented or not ethernet */
1082 * Double check that the config we found is for our interface (or the
1083 * interface is down)
1085 ASSERT ((subint->sw_if_index == sw_if_index) | (subint->sw_if_index == ~0));
1089 subint->flags |= SUBINT_CONFIG_L2;
1093 subint->flags &= ~SUBINT_CONFIG_L2;
1100 static clib_error_t *
1101 ethernet_sw_interface_add_del (vnet_main_t * vnm,
1102 u32 sw_if_index, u32 is_create)
1104 clib_error_t *error = 0;
1105 subint_config_t *subint;
1107 u32 unsupported = 0;
1109 // Find the config for this subinterface
1111 ethernet_sw_interface_get_config (vnm, sw_if_index, &match_flags,
1116 // not implemented yet or not ethernet
1119 // this is the NYI case
1120 error = clib_error_return (0, "not implemented yet");
1131 // Initialize the subint
1132 if (subint->flags & SUBINT_CONFIG_VALID)
1134 // Error vlan already in use
1135 error = clib_error_return (0, "vlan is already in use");
1139 // Note that config is L3 by default
1140 subint->flags = SUBINT_CONFIG_VALID | match_flags;
1141 subint->sw_if_index = ~0; // because interfaces are initially down
1148 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ethernet_sw_interface_add_del);
1150 static char *ethernet_error_strings[] = {
1151 #define ethernet_error(n,c,s) s,
1152 #include "error.def"
1153 #undef ethernet_error
1157 VLIB_REGISTER_NODE (ethernet_input_node) = {
1158 .function = ethernet_input,
1159 .name = "ethernet-input",
1160 /* Takes a vector of packets. */
1161 .vector_size = sizeof (u32),
1162 .n_errors = ETHERNET_N_ERROR,
1163 .error_strings = ethernet_error_strings,
1164 .n_next_nodes = ETHERNET_INPUT_N_NEXT,
1166 #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
1167 foreach_ethernet_input_next
1170 .format_buffer = format_ethernet_header_with_length,
1171 .format_trace = format_ethernet_input_trace,
1172 .unformat_buffer = unformat_ethernet_header,
1177 VLIB_NODE_FUNCTION_MULTIARCH (ethernet_input_node, ethernet_input)
1181 VLIB_REGISTER_NODE (ethernet_input_type_node, static) = {
1182 .function = ethernet_input_type,
1183 .name = "ethernet-input-type",
1184 /* Takes a vector of packets. */
1185 .vector_size = sizeof (u32),
1186 .n_next_nodes = ETHERNET_INPUT_N_NEXT,
1188 #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
1189 foreach_ethernet_input_next
1196 VLIB_NODE_FUNCTION_MULTIARCH (ethernet_input_type_node, ethernet_input_type)
1200 VLIB_REGISTER_NODE (ethernet_input_not_l2_node, static) = {
1201 .function = ethernet_input_not_l2,
1202 .name = "ethernet-input-not-l2",
1203 /* Takes a vector of packets. */
1204 .vector_size = sizeof (u32),
1205 .n_next_nodes = ETHERNET_INPUT_N_NEXT,
1207 #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
1208 foreach_ethernet_input_next
1216 VLIB_NODE_FUNCTION_MULTIARCH (ethernet_input_not_l2_node,
1217 ethernet_input_not_l2)
1222 ethernet_set_rx_redirect (vnet_main_t * vnm,
1223 vnet_hw_interface_t * hi, u32 enable)
1225 // Insure all packets go to ethernet-input (i.e. untagged ipv4 packets
1226 // don't go directly to ip4-input)
1227 vnet_hw_interface_rx_redirect_to_node
1228 (vnm, hi->hw_if_index, enable ? ethernet_input_node.index : ~0);
1233 * Initialization and registration for the next_by_ethernet structure
1237 next_by_ethertype_init (next_by_ethertype_t * l3_next)
1239 l3_next->input_next_by_type = sparse_vec_new
1240 ( /* elt bytes */ sizeof (l3_next->input_next_by_type[0]),
1241 /* bits in index */ BITS (((ethernet_header_t *) 0)->type));
1243 vec_validate (l3_next->sparse_index_by_input_next_index,
1244 ETHERNET_INPUT_NEXT_DROP);
1245 vec_validate (l3_next->sparse_index_by_input_next_index,
1246 ETHERNET_INPUT_NEXT_PUNT);
1247 l3_next->sparse_index_by_input_next_index[ETHERNET_INPUT_NEXT_DROP] =
1248 SPARSE_VEC_INVALID_INDEX;
1249 l3_next->sparse_index_by_input_next_index[ETHERNET_INPUT_NEXT_PUNT] =
1250 SPARSE_VEC_INVALID_INDEX;
1253 * Make sure we don't wipe out an ethernet registration by mistake
1254 * Can happen if init function ordering constraints are missing.
1258 ethernet_main_t *em = ðernet_main;
1259 ASSERT (em->next_by_ethertype_register_called == 0);
1265 // Add an ethertype -> next index mapping to the structure
1267 next_by_ethertype_register (next_by_ethertype_t * l3_next,
1268 u32 ethertype, u32 next_index)
1272 ethernet_main_t *em = ðernet_main;
1276 ethernet_main_t *em = ðernet_main;
1277 em->next_by_ethertype_register_called = 1;
1280 /* Setup ethernet type -> next index sparse vector mapping. */
1281 n = sparse_vec_validate (l3_next->input_next_by_type, ethertype);
1284 /* Rebuild next index -> sparse index inverse mapping when sparse vector
1286 vec_validate (l3_next->sparse_index_by_input_next_index, next_index);
1287 for (i = 1; i < vec_len (l3_next->input_next_by_type); i++)
1289 sparse_index_by_input_next_index[l3_next->input_next_by_type[i]] = i;
1291 // do not allow the cached next index's to be updated if L3
1292 // redirect is enabled, as it will have overwritten them
1293 if (!em->redirect_l3)
1295 // Cache common ethertypes directly
1296 if (ethertype == ETHERNET_TYPE_IP4)
1298 l3_next->input_next_ip4 = next_index;
1300 else if (ethertype == ETHERNET_TYPE_IP6)
1302 l3_next->input_next_ip6 = next_index;
1304 else if (ethertype == ETHERNET_TYPE_MPLS)
1306 l3_next->input_next_mpls = next_index;
1313 static clib_error_t *
1314 ethernet_input_init (vlib_main_t * vm)
1316 ethernet_main_t *em = ðernet_main;
1317 __attribute__ ((unused)) vlan_table_t *invalid_vlan_table;
1318 __attribute__ ((unused)) qinq_table_t *invalid_qinq_table;
1320 ethernet_setup_node (vm, ethernet_input_node.index);
1321 ethernet_setup_node (vm, ethernet_input_type_node.index);
1322 ethernet_setup_node (vm, ethernet_input_not_l2_node.index);
1324 next_by_ethertype_init (&em->l3_next);
1326 // Initialize pools and vector for vlan parsing
1327 vec_validate (em->main_intfs, 10); // 10 main interfaces
1328 pool_alloc (em->vlan_pool, 10);
1329 pool_alloc (em->qinq_pool, 1);
1331 // The first vlan pool will always be reserved for an invalid table
1332 pool_get (em->vlan_pool, invalid_vlan_table); // first id = 0
1333 // The first qinq pool will always be reserved for an invalid table
1334 pool_get (em->qinq_pool, invalid_qinq_table); // first id = 0
1339 VLIB_INIT_FUNCTION (ethernet_input_init);
1342 ethernet_register_input_type (vlib_main_t * vm,
1343 ethernet_type_t type, u32 node_index)
1345 ethernet_main_t *em = ðernet_main;
1346 ethernet_type_info_t *ti;
1350 clib_error_t *error = vlib_call_init_function (vm, ethernet_init);
1352 clib_error_report (error);
1355 ti = ethernet_get_type_info (em, type);
1356 ti->node_index = node_index;
1357 ti->next_index = vlib_node_add_next (vm,
1358 ethernet_input_node.index, node_index);
1359 i = vlib_node_add_next (vm, ethernet_input_type_node.index, node_index);
1360 ASSERT (i == ti->next_index);
1362 i = vlib_node_add_next (vm, ethernet_input_not_l2_node.index, node_index);
1363 ASSERT (i == ti->next_index);
1365 // Add the L3 node for this ethertype to the next nodes structure
1366 next_by_ethertype_register (&em->l3_next, type, ti->next_index);
1368 // Call the registration functions for other nodes that want a mapping
1369 l2bvi_register_input_type (vm, type, node_index);
1373 ethernet_register_l2_input (vlib_main_t * vm, u32 node_index)
1375 ethernet_main_t *em = ðernet_main;
1379 vlib_node_add_next (vm, ethernet_input_node.index, node_index);
1382 * Even if we never use these arcs, we have to align the next indices...
1384 i = vlib_node_add_next (vm, ethernet_input_type_node.index, node_index);
1386 ASSERT (i == em->l2_next);
1388 i = vlib_node_add_next (vm, ethernet_input_not_l2_node.index, node_index);
1389 ASSERT (i == em->l2_next);
1392 // Register a next node for L3 redirect, and enable L3 redirect
1394 ethernet_register_l3_redirect (vlib_main_t * vm, u32 node_index)
1396 ethernet_main_t *em = ðernet_main;
1399 em->redirect_l3 = 1;
1400 em->redirect_l3_next = vlib_node_add_next (vm,
1401 ethernet_input_node.index,
1404 * Change the cached next nodes to the redirect node
1406 em->l3_next.input_next_ip4 = em->redirect_l3_next;
1407 em->l3_next.input_next_ip6 = em->redirect_l3_next;
1408 em->l3_next.input_next_mpls = em->redirect_l3_next;
1411 * Even if we never use these arcs, we have to align the next indices...
1413 i = vlib_node_add_next (vm, ethernet_input_type_node.index, node_index);
1415 ASSERT (i == em->redirect_l3_next);
1417 i = vlib_node_add_next (vm, ethernet_input_not_l2_node.index, node_index);
1419 ASSERT (i == em->redirect_l3_next);
1423 * fd.io coding-style-patch-verification: ON
1426 * eval: (c-set-style "gnu")