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 <vppinfra/sparse_vec.h>
44 #include <vnet/l2/l2_bvi.h>
47 #define foreach_ethernet_input_next \
48 _ (PUNT, "error-punt") \
49 _ (DROP, "error-drop") \
54 #define _(s,n) ETHERNET_INPUT_NEXT_##s,
55 foreach_ethernet_input_next
57 ETHERNET_INPUT_N_NEXT,
58 } ethernet_input_next_t;
63 } ethernet_input_trace_t;
66 format_ethernet_input_trace (u8 * s, va_list * va)
68 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
69 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
70 ethernet_input_trace_t *t = va_arg (*va, ethernet_input_trace_t *);
72 s = format (s, "%U", format_ethernet_header, t->packet_data);
77 vlib_node_registration_t ethernet_input_node;
81 ETHERNET_INPUT_VARIANT_ETHERNET,
82 ETHERNET_INPUT_VARIANT_ETHERNET_TYPE,
83 ETHERNET_INPUT_VARIANT_NOT_L2,
84 } ethernet_input_variant_t;
87 // Parse the ethernet header to extract vlan tags and innermost ethertype
88 static_always_inline void
89 parse_header (ethernet_input_variant_t variant,
93 u16 * outer_id, u16 * inner_id, u32 * match_flags)
97 if (variant == ETHERNET_INPUT_VARIANT_ETHERNET
98 || variant == ETHERNET_INPUT_VARIANT_NOT_L2)
100 ethernet_header_t *e0;
102 e0 = (void *) (b0->data + b0->current_data);
104 vnet_buffer (b0)->ethernet.start_of_ethernet_header = b0->current_data;
106 vlib_buffer_advance (b0, sizeof (e0[0]));
108 *type = clib_net_to_host_u16 (e0->type);
110 else if (variant == ETHERNET_INPUT_VARIANT_ETHERNET_TYPE)
112 // here when prior node was LLC/SNAP processing
115 e0 = (void *) (b0->data + b0->current_data);
117 vlib_buffer_advance (b0, sizeof (e0[0]));
119 *type = clib_net_to_host_u16 (e0[0]);
122 // save for distinguishing between dot1q and dot1ad later
125 // default the tags to 0 (used if there is no corresponding tag)
129 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_0_TAG;
132 // check for vlan encaps
133 if ((*type == ETHERNET_TYPE_VLAN) ||
134 (*type == ETHERNET_TYPE_DOT1AD) ||
135 (*type == ETHERNET_TYPE_VLAN_9100) ||
136 (*type == ETHERNET_TYPE_VLAN_9200))
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 *type = clib_net_to_host_u16 (h0->type);
151 vlib_buffer_advance (b0, sizeof (h0[0]));
154 if (*type == ETHERNET_TYPE_VLAN)
156 // Double tagged packet
157 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_2_TAG;
159 h0 = (void *) (b0->data + b0->current_data);
161 tag = clib_net_to_host_u16 (h0->priority_cfi_and_id);
163 *inner_id = tag & 0xfff;
165 *type = clib_net_to_host_u16 (h0->type);
167 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;
174 vlan_count = 3; // "unknown" number, aka, 3-or-more
178 ethernet_buffer_set_vlan_count (b0, vlan_count);
181 // Determine the subinterface for this packet, given the result of the
182 // vlan table lookups and vlan header parsing. Check the most specific
184 static_always_inline void
185 identify_subint (vnet_hw_interface_t * hi,
188 main_intf_t * main_intf,
189 vlan_intf_t * vlan_intf,
190 qinq_intf_t * qinq_intf,
191 u32 * new_sw_if_index, u8 * error0, u32 * is_l2)
195 matched = eth_identify_subint (hi, b0, match_flags,
196 main_intf, vlan_intf, qinq_intf,
197 new_sw_if_index, error0, is_l2);
202 // Perform L3 my-mac filter
203 // A unicast packet arriving on an L3 interface must have a dmac matching the interface mac.
204 // This is required for promiscuous mode, else we will forward packets we aren't supposed to.
207 ethernet_header_t *e0;
210 vnet_buffer (b0)->ethernet.start_of_ethernet_header);
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)->ethernet.start_of_ethernet_header;
242 vnet_buffer (b0)->l2.l2_len = b0->current_data - eth_start;
243 vlib_buffer_advance (b0, -ethernet_buffer_header_size (b0));
245 // check for common IP/MPLS ethertypes
247 else if (type0 == ETHERNET_TYPE_IP4)
249 *next0 = em->l3_next.input_next_ip4;
251 else if (type0 == ETHERNET_TYPE_IP6)
253 *next0 = em->l3_next.input_next_ip6;
255 else if (type0 == ETHERNET_TYPE_MPLS_UNICAST)
257 *next0 = em->l3_next.input_next_mpls;
260 else if (em->redirect_l3)
262 // L3 Redirect is on, the cached common next nodes will be
263 // pointing to the redirect node, catch the uncommon types here
264 *next0 = em->redirect_l3_next;
268 // uncommon ethertype, check table
270 i0 = sparse_vec_index (em->l3_next.input_next_by_type, type0);
271 *next0 = vec_elt (em->l3_next.input_next_by_type, i0);
274 SPARSE_VEC_INVALID_INDEX ? ETHERNET_ERROR_UNKNOWN_TYPE : *error0;
276 // The table is not populated with LLC values, so check that now.
277 // If variant is variant_ethernet then we came from LLC processing. Don't
278 // go back there; drop instead using by keeping the drop/bad table result.
279 if ((type0 < 0x600) && (variant == ETHERNET_INPUT_VARIANT_ETHERNET))
281 *next0 = ETHERNET_INPUT_NEXT_LLC;
286 static_always_inline uword
287 ethernet_input_inline (vlib_main_t * vm,
288 vlib_node_runtime_t * node,
289 vlib_frame_t * from_frame,
290 ethernet_input_variant_t variant)
292 vnet_main_t *vnm = vnet_get_main ();
293 ethernet_main_t *em = ðernet_main;
294 vlib_node_runtime_t *error_node;
295 u32 n_left_from, next_index, *from, *to_next;
296 u32 stats_sw_if_index, stats_n_packets, stats_n_bytes;
297 u32 cpu_index = os_get_cpu_number ();
299 if (variant != ETHERNET_INPUT_VARIANT_ETHERNET)
300 error_node = vlib_node_get_runtime (vm, ethernet_input_node.index);
304 from = vlib_frame_vector_args (from_frame);
305 n_left_from = from_frame->n_vectors;
307 if (node->flags & VLIB_NODE_FLAG_TRACE)
308 vlib_trace_frame_buffers_only (vm, node,
312 sizeof (ethernet_input_trace_t));
314 next_index = node->cached_next_index;
315 stats_sw_if_index = node->runtime_data[0];
316 stats_n_packets = stats_n_bytes = 0;
318 while (n_left_from > 0)
322 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
324 while (n_left_from >= 4 && n_left_to_next >= 2)
327 vlib_buffer_t *b0, *b1;
328 u8 next0, next1, error0, error1;
329 u16 type0, orig_type0, type1, orig_type1;
330 u16 outer_id0, inner_id0, outer_id1, inner_id1;
331 u32 match_flags0, match_flags1;
332 u32 old_sw_if_index0, new_sw_if_index0, len0, old_sw_if_index1,
333 new_sw_if_index1, len1;
334 vnet_hw_interface_t *hi0, *hi1;
335 main_intf_t *main_intf0, *main_intf1;
336 vlan_intf_t *vlan_intf0, *vlan_intf1;
337 qinq_intf_t *qinq_intf0, *qinq_intf1;
340 /* Prefetch next iteration. */
342 vlib_buffer_t *b2, *b3;
344 b2 = vlib_get_buffer (vm, from[2]);
345 b3 = vlib_get_buffer (vm, from[3]);
347 vlib_prefetch_buffer_header (b2, STORE);
348 vlib_prefetch_buffer_header (b3, STORE);
350 CLIB_PREFETCH (b2->data, sizeof (ethernet_header_t), LOAD);
351 CLIB_PREFETCH (b3->data, sizeof (ethernet_header_t), LOAD);
363 b0 = vlib_get_buffer (vm, bi0);
364 b1 = vlib_get_buffer (vm, bi1);
366 error0 = error1 = ETHERNET_ERROR_NONE;
368 parse_header (variant,
371 &orig_type0, &outer_id0, &inner_id0, &match_flags0);
373 parse_header (variant,
376 &orig_type1, &outer_id1, &inner_id1, &match_flags1);
378 old_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
379 old_sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
381 eth_vlan_table_lookups (em,
388 &main_intf0, &vlan_intf0, &qinq_intf0);
390 eth_vlan_table_lookups (em,
397 &main_intf1, &vlan_intf1, &qinq_intf1);
399 identify_subint (hi0,
404 qinq_intf0, &new_sw_if_index0, &error0, &is_l20);
406 identify_subint (hi1,
411 qinq_intf1, &new_sw_if_index1, &error1, &is_l21);
413 // Save RX sw_if_index for later nodes
414 vnet_buffer (b0)->sw_if_index[VLIB_RX] =
416 ETHERNET_ERROR_NONE ? old_sw_if_index0 : new_sw_if_index0;
417 vnet_buffer (b1)->sw_if_index[VLIB_RX] =
419 ETHERNET_ERROR_NONE ? old_sw_if_index1 : new_sw_if_index1;
421 // Check if there is a stat to take (valid and non-main sw_if_index for pkt 0 or pkt 1)
422 if (((new_sw_if_index0 != ~0)
423 && (new_sw_if_index0 != old_sw_if_index0))
424 || ((new_sw_if_index1 != ~0)
425 && (new_sw_if_index1 != old_sw_if_index1)))
428 len0 = vlib_buffer_length_in_chain (vm, b0) + b0->current_data
429 - vnet_buffer (b0)->ethernet.start_of_ethernet_header;
430 len1 = vlib_buffer_length_in_chain (vm, b1) + b1->current_data
431 - vnet_buffer (b1)->ethernet.start_of_ethernet_header;
433 stats_n_packets += 2;
434 stats_n_bytes += len0 + len1;
437 (!(new_sw_if_index0 == stats_sw_if_index
438 && new_sw_if_index1 == stats_sw_if_index)))
440 stats_n_packets -= 2;
441 stats_n_bytes -= len0 + len1;
443 if (new_sw_if_index0 != old_sw_if_index0
444 && new_sw_if_index0 != ~0)
445 vlib_increment_combined_counter (vnm->
446 interface_main.combined_sw_if_counters
448 VNET_INTERFACE_COUNTER_RX,
452 if (new_sw_if_index1 != old_sw_if_index1
453 && new_sw_if_index1 != ~0)
454 vlib_increment_combined_counter (vnm->
455 interface_main.combined_sw_if_counters
457 VNET_INTERFACE_COUNTER_RX,
462 if (new_sw_if_index0 == new_sw_if_index1)
464 if (stats_n_packets > 0)
466 vlib_increment_combined_counter
467 (vnm->interface_main.combined_sw_if_counters
468 + VNET_INTERFACE_COUNTER_RX,
471 stats_n_packets, stats_n_bytes);
472 stats_n_packets = stats_n_bytes = 0;
474 stats_sw_if_index = new_sw_if_index0;
479 if (variant == ETHERNET_INPUT_VARIANT_NOT_L2)
482 determine_next_node (em, variant, is_l20, type0, b0, &error0,
484 determine_next_node (em, variant, is_l21, type1, b1, &error1,
487 b0->error = error_node->errors[error0];
488 b1->error = error_node->errors[error1];
490 // verify speculative enqueue
491 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
492 n_left_to_next, bi0, bi1, next0,
496 while (n_left_from > 0 && n_left_to_next > 0)
501 u16 type0, orig_type0;
502 u16 outer_id0, inner_id0;
504 u32 old_sw_if_index0, new_sw_if_index0, len0;
505 vnet_hw_interface_t *hi0;
506 main_intf_t *main_intf0;
507 vlan_intf_t *vlan_intf0;
508 qinq_intf_t *qinq_intf0;
511 // Prefetch next iteration
516 p2 = vlib_get_buffer (vm, from[1]);
517 vlib_prefetch_buffer_header (p2, STORE);
518 CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD);
528 b0 = vlib_get_buffer (vm, bi0);
530 error0 = ETHERNET_ERROR_NONE;
532 parse_header (variant,
535 &orig_type0, &outer_id0, &inner_id0, &match_flags0);
537 old_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
539 eth_vlan_table_lookups (em,
546 &main_intf0, &vlan_intf0, &qinq_intf0);
548 identify_subint (hi0,
553 qinq_intf0, &new_sw_if_index0, &error0, &is_l20);
555 // Save RX sw_if_index for later nodes
556 vnet_buffer (b0)->sw_if_index[VLIB_RX] =
558 ETHERNET_ERROR_NONE ? old_sw_if_index0 : new_sw_if_index0;
560 // Increment subinterface stats
561 // Note that interface-level counters have already been incremented
562 // prior to calling this function. Thus only subinterface counters
563 // are incremented here.
565 // Interface level counters include packets received on the main
566 // interface and all subinterfaces. Subinterface level counters
567 // include only those packets received on that subinterface
568 // Increment stats if the subint is valid and it is not the main intf
569 if ((new_sw_if_index0 != ~0)
570 && (new_sw_if_index0 != old_sw_if_index0))
573 len0 = vlib_buffer_length_in_chain (vm, b0) + b0->current_data
574 - vnet_buffer (b0)->ethernet.start_of_ethernet_header;
576 stats_n_packets += 1;
577 stats_n_bytes += len0;
579 // Batch stat increments from the same subinterface so counters
580 // don't need to be incremented for every packet.
581 if (PREDICT_FALSE (new_sw_if_index0 != stats_sw_if_index))
583 stats_n_packets -= 1;
584 stats_n_bytes -= len0;
586 if (new_sw_if_index0 != ~0)
587 vlib_increment_combined_counter
588 (vnm->interface_main.combined_sw_if_counters
589 + VNET_INTERFACE_COUNTER_RX,
590 cpu_index, new_sw_if_index0, 1, len0);
591 if (stats_n_packets > 0)
593 vlib_increment_combined_counter
594 (vnm->interface_main.combined_sw_if_counters
595 + VNET_INTERFACE_COUNTER_RX,
597 stats_sw_if_index, stats_n_packets, stats_n_bytes);
598 stats_n_packets = stats_n_bytes = 0;
600 stats_sw_if_index = new_sw_if_index0;
604 if (variant == ETHERNET_INPUT_VARIANT_NOT_L2)
607 determine_next_node (em, variant, is_l20, type0, b0, &error0,
610 b0->error = error_node->errors[error0];
612 // verify speculative enqueue
613 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
614 to_next, n_left_to_next,
618 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
621 // Increment any remaining batched stats
622 if (stats_n_packets > 0)
624 vlib_increment_combined_counter
625 (vnm->interface_main.combined_sw_if_counters
626 + VNET_INTERFACE_COUNTER_RX,
627 cpu_index, stats_sw_if_index, stats_n_packets, stats_n_bytes);
628 node->runtime_data[0] = stats_sw_if_index;
631 return from_frame->n_vectors;
635 ethernet_input (vlib_main_t * vm,
636 vlib_node_runtime_t * node, vlib_frame_t * from_frame)
638 return ethernet_input_inline (vm, node, from_frame,
639 ETHERNET_INPUT_VARIANT_ETHERNET);
643 ethernet_input_type (vlib_main_t * vm,
644 vlib_node_runtime_t * node, vlib_frame_t * from_frame)
646 return ethernet_input_inline (vm, node, from_frame,
647 ETHERNET_INPUT_VARIANT_ETHERNET_TYPE);
651 ethernet_input_not_l2 (vlib_main_t * vm,
652 vlib_node_runtime_t * node, vlib_frame_t * from_frame)
654 return ethernet_input_inline (vm, node, from_frame,
655 ETHERNET_INPUT_VARIANT_NOT_L2);
659 // Return the subinterface config struct for the given sw_if_index
660 // Also return via parameter the appropriate match flags for the
661 // configured number of tags.
662 // On error (unsupported or not ethernet) return 0.
663 static subint_config_t *
664 ethernet_sw_interface_get_config (vnet_main_t * vnm,
666 u32 * flags, u32 * unsupported)
668 ethernet_main_t *em = ðernet_main;
669 vnet_hw_interface_t *hi;
670 vnet_sw_interface_t *si;
671 main_intf_t *main_intf;
672 vlan_table_t *vlan_table;
673 qinq_table_t *qinq_table;
674 subint_config_t *subint = 0;
676 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
678 if (!hi || (hi->hw_class_index != ethernet_hw_interface_class.index))
681 goto done; // non-ethernet interface
684 // ensure there's an entry for the main intf (shouldn't really be necessary)
685 vec_validate (em->main_intfs, hi->hw_if_index);
686 main_intf = vec_elt_at_index (em->main_intfs, hi->hw_if_index);
688 // Locate the subint for the given ethernet config
689 si = vnet_get_sw_interface (vnm, sw_if_index);
691 if (si->sub.eth.flags.default_sub)
693 subint = &main_intf->default_subint;
694 *flags = SUBINT_CONFIG_MATCH_0_TAG |
695 SUBINT_CONFIG_MATCH_1_TAG |
696 SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG;
698 else if ((si->sub.eth.flags.no_tags) || (si->sub.eth.raw_flags == 0))
700 // if no flags are set then this is a main interface
701 // so treat as untagged
702 subint = &main_intf->untagged_subint;
703 *flags = SUBINT_CONFIG_MATCH_0_TAG;
708 // first get the vlan table
709 if (si->sub.eth.flags.dot1ad)
711 if (main_intf->dot1ad_vlans == 0)
713 // Allocate a vlan table from the pool
714 pool_get (em->vlan_pool, vlan_table);
715 main_intf->dot1ad_vlans = vlan_table - em->vlan_pool;
719 // Get ptr to existing vlan table
721 vec_elt_at_index (em->vlan_pool, main_intf->dot1ad_vlans);
726 if (main_intf->dot1q_vlans == 0)
728 // Allocate a vlan table from the pool
729 pool_get (em->vlan_pool, vlan_table);
730 main_intf->dot1q_vlans = vlan_table - em->vlan_pool;
734 // Get ptr to existing vlan table
736 vec_elt_at_index (em->vlan_pool, main_intf->dot1q_vlans);
740 if (si->sub.eth.flags.one_tag)
742 *flags = si->sub.eth.flags.exact_match ?
743 SUBINT_CONFIG_MATCH_1_TAG :
744 (SUBINT_CONFIG_MATCH_1_TAG |
745 SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG);
747 if (si->sub.eth.flags.outer_vlan_id_any)
749 // not implemented yet
755 // a single vlan, a common case
757 &vlan_table->vlans[si->sub.eth.
758 outer_vlan_id].single_tag_subint;
765 *flags = si->sub.eth.flags.exact_match ?
766 SUBINT_CONFIG_MATCH_2_TAG :
767 (SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG);
769 if (si->sub.eth.flags.outer_vlan_id_any
770 && si->sub.eth.flags.inner_vlan_id_any)
772 // not implemented yet
777 if (si->sub.eth.flags.inner_vlan_id_any)
779 // a specific outer and "any" inner
780 // don't need a qinq table for this
782 &vlan_table->vlans[si->sub.eth.
783 outer_vlan_id].inner_any_subint;
784 if (si->sub.eth.flags.exact_match)
786 *flags = SUBINT_CONFIG_MATCH_2_TAG;
790 *flags = SUBINT_CONFIG_MATCH_2_TAG |
791 SUBINT_CONFIG_MATCH_3_TAG;
796 // a specific outer + specifc innner vlan id, a common case
798 // get the qinq table
799 if (vlan_table->vlans[si->sub.eth.outer_vlan_id].qinqs == 0)
801 // Allocate a qinq table from the pool
802 pool_get (em->qinq_pool, qinq_table);
803 vlan_table->vlans[si->sub.eth.outer_vlan_id].qinqs =
804 qinq_table - em->qinq_pool;
808 // Get ptr to existing qinq table
810 vec_elt_at_index (em->qinq_pool,
811 vlan_table->vlans[si->sub.
815 subint = &qinq_table->vlans[si->sub.eth.inner_vlan_id].subint;
825 ethernet_sw_interface_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
827 subint_config_t *subint;
830 clib_error_t *error = 0;
832 // Find the config for this subinterface
834 ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags,
839 // not implemented yet or not ethernet
843 subint->sw_if_index =
844 ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ? sw_if_index : ~0);
850 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ethernet_sw_interface_up_down);
853 // Set the L2/L3 mode for the subinterface
855 ethernet_sw_interface_set_l2_mode (vnet_main_t * vnm, u32 sw_if_index, u32 l2)
857 subint_config_t *subint;
861 vnet_sw_interface_t *sw = vnet_get_sw_interface (vnm, sw_if_index);
863 is_port = !(sw->type == VNET_SW_INTERFACE_TYPE_SUB);
865 // Find the config for this subinterface
867 ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags,
872 // unimplemented or not ethernet
876 // Double check that the config we found is for our interface (or the interface is down)
877 ASSERT ((subint->sw_if_index == sw_if_index) | (subint->sw_if_index == ~0));
881 subint->flags |= SUBINT_CONFIG_L2;
884 SUBINT_CONFIG_MATCH_0_TAG | SUBINT_CONFIG_MATCH_1_TAG
885 | SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG;
889 subint->flags &= ~SUBINT_CONFIG_L2;
892 ~(SUBINT_CONFIG_MATCH_1_TAG | SUBINT_CONFIG_MATCH_2_TAG
893 | SUBINT_CONFIG_MATCH_3_TAG);
901 * Set the L2/L3 mode for the subinterface regardless of port
904 ethernet_sw_interface_set_l2_mode_noport (vnet_main_t * vnm,
905 u32 sw_if_index, u32 l2)
907 subint_config_t *subint;
911 /* Find the config for this subinterface */
913 ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags,
918 /* unimplemented or not ethernet */
923 * Double check that the config we found is for our interface (or the
926 ASSERT ((subint->sw_if_index == sw_if_index) | (subint->sw_if_index == ~0));
930 subint->flags |= SUBINT_CONFIG_L2;
934 subint->flags &= ~SUBINT_CONFIG_L2;
941 static clib_error_t *
942 ethernet_sw_interface_add_del (vnet_main_t * vnm,
943 u32 sw_if_index, u32 is_create)
945 clib_error_t *error = 0;
946 subint_config_t *subint;
950 // Find the config for this subinterface
952 ethernet_sw_interface_get_config (vnm, sw_if_index, &match_flags,
957 // not implemented yet or not ethernet
960 // this is the NYI case
961 error = clib_error_return (0, "not implemented yet");
972 // Initialize the subint
973 if (subint->flags & SUBINT_CONFIG_VALID)
975 // Error vlan already in use
976 error = clib_error_return (0, "vlan is already in use");
980 // Note that config is L3 by defaulty
981 subint->flags = SUBINT_CONFIG_VALID | match_flags;
982 subint->sw_if_index = ~0; // because interfaces are initially down
989 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ethernet_sw_interface_add_del);
991 static char *ethernet_error_strings[] = {
992 #define ethernet_error(n,c,s) s,
994 #undef ethernet_error
998 VLIB_REGISTER_NODE (ethernet_input_node) = {
999 .function = ethernet_input,
1000 .name = "ethernet-input",
1001 /* Takes a vector of packets. */
1002 .vector_size = sizeof (u32),
1003 .n_errors = ETHERNET_N_ERROR,
1004 .error_strings = ethernet_error_strings,
1005 .n_next_nodes = ETHERNET_INPUT_N_NEXT,
1007 #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
1008 foreach_ethernet_input_next
1011 .format_buffer = format_ethernet_header_with_length,
1012 .format_trace = format_ethernet_input_trace,
1013 .unformat_buffer = unformat_ethernet_header,
1018 VLIB_NODE_FUNCTION_MULTIARCH (ethernet_input_node, ethernet_input)
1022 VLIB_REGISTER_NODE (ethernet_input_type_node, static) = {
1023 .function = ethernet_input_type,
1024 .name = "ethernet-input-type",
1025 /* Takes a vector of packets. */
1026 .vector_size = sizeof (u32),
1027 .n_next_nodes = ETHERNET_INPUT_N_NEXT,
1029 #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
1030 foreach_ethernet_input_next
1037 VLIB_NODE_FUNCTION_MULTIARCH (ethernet_input_type_node, ethernet_input_type)
1041 VLIB_REGISTER_NODE (ethernet_input_not_l2_node, static) = {
1042 .function = ethernet_input_not_l2,
1043 .name = "ethernet-input-not-l2",
1044 /* Takes a vector of packets. */
1045 .vector_size = sizeof (u32),
1046 .n_next_nodes = ETHERNET_INPUT_N_NEXT,
1048 #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
1049 foreach_ethernet_input_next
1057 VLIB_NODE_FUNCTION_MULTIARCH (ethernet_input_not_l2_node,
1058 ethernet_input_not_l2)
1063 ethernet_set_rx_redirect (vnet_main_t * vnm,
1064 vnet_hw_interface_t * hi, u32 enable)
1066 // Insure all packets go to ethernet-input (i.e. untagged ipv4 packets
1067 // don't go directly to ip4-input)
1068 vnet_hw_interface_rx_redirect_to_node
1069 (vnm, hi->hw_if_index, enable ? ethernet_input_node.index : ~0);
1074 * Initialization and registration for the next_by_ethernet structure
1078 next_by_ethertype_init (next_by_ethertype_t * l3_next)
1080 l3_next->input_next_by_type = sparse_vec_new
1081 ( /* elt bytes */ sizeof (l3_next->input_next_by_type[0]),
1082 /* bits in index */ BITS (((ethernet_header_t *) 0)->type));
1084 vec_validate (l3_next->sparse_index_by_input_next_index,
1085 ETHERNET_INPUT_NEXT_DROP);
1086 vec_validate (l3_next->sparse_index_by_input_next_index,
1087 ETHERNET_INPUT_NEXT_PUNT);
1088 l3_next->sparse_index_by_input_next_index[ETHERNET_INPUT_NEXT_DROP] =
1089 SPARSE_VEC_INVALID_INDEX;
1090 l3_next->sparse_index_by_input_next_index[ETHERNET_INPUT_NEXT_PUNT] =
1091 SPARSE_VEC_INVALID_INDEX;
1094 * Make sure we don't wipe out an ethernet registration by mistake
1095 * Can happen if init function ordering constraints are missing.
1099 ethernet_main_t *em = ðernet_main;
1100 ASSERT (em->next_by_ethertype_register_called == 0);
1106 // Add an ethertype -> next index mapping to the structure
1108 next_by_ethertype_register (next_by_ethertype_t * l3_next,
1109 u32 ethertype, u32 next_index)
1113 ethernet_main_t *em = ðernet_main;
1117 ethernet_main_t *em = ðernet_main;
1118 em->next_by_ethertype_register_called = 1;
1121 /* Setup ethernet type -> next index sparse vector mapping. */
1122 n = sparse_vec_validate (l3_next->input_next_by_type, ethertype);
1125 /* Rebuild next index -> sparse index inverse mapping when sparse vector
1127 vec_validate (l3_next->sparse_index_by_input_next_index, next_index);
1128 for (i = 1; i < vec_len (l3_next->input_next_by_type); i++)
1130 sparse_index_by_input_next_index[l3_next->input_next_by_type[i]] = i;
1132 // do not allow the cached next index's to be updated if L3
1133 // redirect is enabled, as it will have overwritten them
1134 if (!em->redirect_l3)
1136 // Cache common ethertypes directly
1137 if (ethertype == ETHERNET_TYPE_IP4)
1139 l3_next->input_next_ip4 = next_index;
1141 else if (ethertype == ETHERNET_TYPE_IP6)
1143 l3_next->input_next_ip6 = next_index;
1145 else if (ethertype == ETHERNET_TYPE_MPLS_UNICAST)
1147 l3_next->input_next_mpls = next_index;
1154 static clib_error_t *
1155 ethernet_input_init (vlib_main_t * vm)
1157 ethernet_main_t *em = ðernet_main;
1158 __attribute__ ((unused)) vlan_table_t *invalid_vlan_table;
1159 __attribute__ ((unused)) qinq_table_t *invalid_qinq_table;
1161 ethernet_setup_node (vm, ethernet_input_node.index);
1162 ethernet_setup_node (vm, ethernet_input_type_node.index);
1163 ethernet_setup_node (vm, ethernet_input_not_l2_node.index);
1165 next_by_ethertype_init (&em->l3_next);
1167 // Initialize pools and vector for vlan parsing
1168 vec_validate (em->main_intfs, 10); // 10 main interfaces
1169 pool_alloc (em->vlan_pool, 10);
1170 pool_alloc (em->qinq_pool, 1);
1172 // The first vlan pool will always be reserved for an invalid table
1173 pool_get (em->vlan_pool, invalid_vlan_table); // first id = 0
1174 // The first qinq pool will always be reserved for an invalid table
1175 pool_get (em->qinq_pool, invalid_qinq_table); // first id = 0
1180 VLIB_INIT_FUNCTION (ethernet_input_init);
1183 ethernet_register_input_type (vlib_main_t * vm,
1184 ethernet_type_t type, u32 node_index)
1186 ethernet_main_t *em = ðernet_main;
1187 ethernet_type_info_t *ti;
1191 clib_error_t *error = vlib_call_init_function (vm, ethernet_init);
1193 clib_error_report (error);
1196 ti = ethernet_get_type_info (em, type);
1197 ti->node_index = node_index;
1198 ti->next_index = vlib_node_add_next (vm,
1199 ethernet_input_node.index, node_index);
1200 i = vlib_node_add_next (vm, ethernet_input_type_node.index, node_index);
1201 ASSERT (i == ti->next_index);
1203 i = vlib_node_add_next (vm, ethernet_input_not_l2_node.index, node_index);
1204 ASSERT (i == ti->next_index);
1206 // Add the L3 node for this ethertype to the next nodes structure
1207 next_by_ethertype_register (&em->l3_next, type, ti->next_index);
1209 // Call the registration functions for other nodes that want a mapping
1210 l2bvi_register_input_type (vm, type, node_index);
1214 ethernet_register_l2_input (vlib_main_t * vm, u32 node_index)
1216 ethernet_main_t *em = ðernet_main;
1220 vlib_node_add_next (vm, ethernet_input_node.index, node_index);
1223 * Even if we never use these arcs, we have to align the next indices...
1225 i = vlib_node_add_next (vm, ethernet_input_type_node.index, node_index);
1227 ASSERT (i == em->l2_next);
1229 i = vlib_node_add_next (vm, ethernet_input_not_l2_node.index, node_index);
1230 ASSERT (i == em->l2_next);
1233 // Register a next node for L3 redirect, and enable L3 redirect
1235 ethernet_register_l3_redirect (vlib_main_t * vm, u32 node_index)
1237 ethernet_main_t *em = ðernet_main;
1240 em->redirect_l3 = 1;
1241 em->redirect_l3_next = vlib_node_add_next (vm,
1242 ethernet_input_node.index,
1245 * Change the cached next nodes to the redirect node
1247 em->l3_next.input_next_ip4 = em->redirect_l3_next;
1248 em->l3_next.input_next_ip6 = em->redirect_l3_next;
1249 em->l3_next.input_next_mpls = em->redirect_l3_next;
1252 * Even if we never use these arcs, we have to align the next indices...
1254 i = vlib_node_add_next (vm, ethernet_input_type_node.index, node_index);
1256 ASSERT (i == em->redirect_l3_next);
1260 * fd.io coding-style-patch-verification: ON
1263 * eval: (c-set-style "gnu")