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 (ethernet_frame_is_tagged (*type))
135 ethernet_vlan_header_t *h0;
138 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_1_TAG;
140 h0 = (void *) (b0->data + b0->current_data);
142 tag = clib_net_to_host_u16 (h0->priority_cfi_and_id);
144 *outer_id = tag & 0xfff;
146 *type = clib_net_to_host_u16 (h0->type);
148 vlib_buffer_advance (b0, sizeof (h0[0]));
151 if (*type == ETHERNET_TYPE_VLAN)
153 // Double tagged packet
154 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_2_TAG;
156 h0 = (void *) (b0->data + b0->current_data);
158 tag = clib_net_to_host_u16 (h0->priority_cfi_and_id);
160 *inner_id = tag & 0xfff;
162 *type = clib_net_to_host_u16 (h0->type);
164 vlib_buffer_advance (b0, sizeof (h0[0]));
167 if (*type == ETHERNET_TYPE_VLAN)
169 // More than double tagged packet
170 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_3_TAG;
171 vlan_count = 3; // "unknown" number, aka, 3-or-more
175 ethernet_buffer_set_vlan_count (b0, vlan_count);
178 // Determine the subinterface for this packet, given the result of the
179 // vlan table lookups and vlan header parsing. Check the most specific
181 static_always_inline void
182 identify_subint (vnet_hw_interface_t * hi,
185 main_intf_t * main_intf,
186 vlan_intf_t * vlan_intf,
187 qinq_intf_t * qinq_intf,
188 u32 * new_sw_if_index, u8 * error0, u32 * is_l2)
192 matched = eth_identify_subint (hi, b0, match_flags,
193 main_intf, vlan_intf, qinq_intf,
194 new_sw_if_index, error0, is_l2);
199 // Perform L3 my-mac filter
200 // A unicast packet arriving on an L3 interface must have a dmac matching the interface mac.
201 // This is required for promiscuous mode, else we will forward packets we aren't supposed to.
204 ethernet_header_t *e0;
207 vnet_buffer (b0)->ethernet.start_of_ethernet_header);
209 if (!(ethernet_address_cast (e0->dst_address)))
211 if (!eth_mac_equal ((u8 *) e0, hi->hw_address))
213 *error0 = ETHERNET_ERROR_L3_MAC_MISMATCH;
218 // Check for down subinterface
219 *error0 = (*new_sw_if_index) != ~0 ? (*error0) : ETHERNET_ERROR_DOWN;
223 static_always_inline void
224 determine_next_node (ethernet_main_t * em,
225 ethernet_input_variant_t variant,
227 u32 type0, vlib_buffer_t * b0, u8 * error0, u8 * next0)
229 if (PREDICT_FALSE (*error0 != ETHERNET_ERROR_NONE))
231 // some error occurred
232 *next0 = ETHERNET_INPUT_NEXT_DROP;
236 *next0 = em->l2_next;
237 // record the L2 len and reset the buffer so the L2 header is preserved
238 u32 eth_start = vnet_buffer (b0)->ethernet.start_of_ethernet_header;
239 vnet_buffer (b0)->l2.l2_len = b0->current_data - eth_start;
240 vlib_buffer_advance (b0, -ethernet_buffer_header_size (b0));
242 // check for common IP/MPLS ethertypes
244 else if (type0 == ETHERNET_TYPE_IP4)
246 *next0 = em->l3_next.input_next_ip4;
248 else if (type0 == ETHERNET_TYPE_IP6)
250 *next0 = em->l3_next.input_next_ip6;
252 else if (type0 == ETHERNET_TYPE_MPLS_UNICAST)
254 *next0 = em->l3_next.input_next_mpls;
257 else if (em->redirect_l3)
259 // L3 Redirect is on, the cached common next nodes will be
260 // pointing to the redirect node, catch the uncommon types here
261 *next0 = em->redirect_l3_next;
265 // uncommon ethertype, check table
267 i0 = sparse_vec_index (em->l3_next.input_next_by_type, type0);
268 *next0 = vec_elt (em->l3_next.input_next_by_type, i0);
271 SPARSE_VEC_INVALID_INDEX ? ETHERNET_ERROR_UNKNOWN_TYPE : *error0;
273 // The table is not populated with LLC values, so check that now.
274 // If variant is variant_ethernet then we came from LLC processing. Don't
275 // go back there; drop instead using by keeping the drop/bad table result.
276 if ((type0 < 0x600) && (variant == ETHERNET_INPUT_VARIANT_ETHERNET))
278 *next0 = ETHERNET_INPUT_NEXT_LLC;
283 static_always_inline uword
284 ethernet_input_inline (vlib_main_t * vm,
285 vlib_node_runtime_t * node,
286 vlib_frame_t * from_frame,
287 ethernet_input_variant_t variant)
289 vnet_main_t *vnm = vnet_get_main ();
290 ethernet_main_t *em = ðernet_main;
291 vlib_node_runtime_t *error_node;
292 u32 n_left_from, next_index, *from, *to_next;
293 u32 stats_sw_if_index, stats_n_packets, stats_n_bytes;
294 u32 cpu_index = os_get_cpu_number ();
295 u32 cached_sw_if_index = ~0;
296 u32 cached_is_l2 = 0; /* shut up gcc */
298 if (variant != ETHERNET_INPUT_VARIANT_ETHERNET)
299 error_node = vlib_node_get_runtime (vm, ethernet_input_node.index);
303 from = vlib_frame_vector_args (from_frame);
304 n_left_from = from_frame->n_vectors;
306 if (node->flags & VLIB_NODE_FLAG_TRACE)
307 vlib_trace_frame_buffers_only (vm, node,
311 sizeof (ethernet_input_trace_t));
313 next_index = node->cached_next_index;
314 stats_sw_if_index = node->runtime_data[0];
315 stats_n_packets = stats_n_bytes = 0;
317 while (n_left_from > 0)
321 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
323 while (n_left_from >= 4 && n_left_to_next >= 2)
326 vlib_buffer_t *b0, *b1;
327 u8 next0, next1, error0, error1;
328 u16 type0, orig_type0, type1, orig_type1;
329 u16 outer_id0, inner_id0, outer_id1, inner_id1;
330 u32 match_flags0, match_flags1;
331 u32 old_sw_if_index0, new_sw_if_index0, len0, old_sw_if_index1,
332 new_sw_if_index1, len1;
333 vnet_hw_interface_t *hi0, *hi1;
334 main_intf_t *main_intf0, *main_intf1;
335 vlan_intf_t *vlan_intf0, *vlan_intf1;
336 qinq_intf_t *qinq_intf0, *qinq_intf1;
338 ethernet_header_t *e0, *e1;
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;
367 e0 = vlib_buffer_get_current (b0);
368 type0 = clib_net_to_host_u16 (e0->type);
369 e1 = vlib_buffer_get_current (b1);
370 type1 = clib_net_to_host_u16 (e1->type);
372 /* Speed-path for the untagged case */
373 if (PREDICT_TRUE (variant == ETHERNET_INPUT_VARIANT_ETHERNET
374 && !ethernet_frame_is_tagged (type0)
375 && !ethernet_frame_is_tagged (type1)))
378 subint_config_t *subint0;
379 u32 sw_if_index0, sw_if_index1;
381 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
382 sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
383 is_l20 = cached_is_l2;
385 /* This is probably wholly unnecessary */
386 if (PREDICT_FALSE (sw_if_index0 != sw_if_index1))
389 if (PREDICT_FALSE (cached_sw_if_index != sw_if_index0))
391 cached_sw_if_index = sw_if_index0;
392 hi0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
393 intf0 = vec_elt_at_index (em->main_intfs, hi0->hw_if_index);
394 subint0 = &intf0->untagged_subint;
395 cached_is_l2 = is_l20 = subint0->flags & SUBINT_CONFIG_L2;
398 vnet_buffer (b0)->ethernet.start_of_ethernet_header =
400 vnet_buffer (b1)->ethernet.start_of_ethernet_header =
403 if (PREDICT_TRUE (is_l20 != 0))
406 vnet_buffer (b0)->l2.l2_len = sizeof (ethernet_header_t);
408 vnet_buffer (b1)->l2.l2_len = sizeof (ethernet_header_t);
412 determine_next_node (em, variant, 0, type0, b0,
414 vlib_buffer_advance (b0, sizeof (ethernet_header_t));
415 determine_next_node (em, variant, 0, type1, b1,
417 vlib_buffer_advance (b1, sizeof (ethernet_header_t));
422 /* Slow-path for the tagged case */
424 parse_header (variant,
427 &orig_type0, &outer_id0, &inner_id0, &match_flags0);
429 parse_header (variant,
432 &orig_type1, &outer_id1, &inner_id1, &match_flags1);
434 old_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
435 old_sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
437 eth_vlan_table_lookups (em,
444 &main_intf0, &vlan_intf0, &qinq_intf0);
446 eth_vlan_table_lookups (em,
453 &main_intf1, &vlan_intf1, &qinq_intf1);
455 identify_subint (hi0,
460 qinq_intf0, &new_sw_if_index0, &error0, &is_l20);
462 identify_subint (hi1,
467 qinq_intf1, &new_sw_if_index1, &error1, &is_l21);
469 // Save RX sw_if_index for later nodes
470 vnet_buffer (b0)->sw_if_index[VLIB_RX] =
472 ETHERNET_ERROR_NONE ? old_sw_if_index0 : new_sw_if_index0;
473 vnet_buffer (b1)->sw_if_index[VLIB_RX] =
475 ETHERNET_ERROR_NONE ? old_sw_if_index1 : new_sw_if_index1;
477 // Check if there is a stat to take (valid and non-main sw_if_index for pkt 0 or pkt 1)
478 if (((new_sw_if_index0 != ~0)
479 && (new_sw_if_index0 != old_sw_if_index0))
480 || ((new_sw_if_index1 != ~0)
481 && (new_sw_if_index1 != old_sw_if_index1)))
484 len0 = vlib_buffer_length_in_chain (vm, b0) + b0->current_data
485 - vnet_buffer (b0)->ethernet.start_of_ethernet_header;
486 len1 = vlib_buffer_length_in_chain (vm, b1) + b1->current_data
487 - vnet_buffer (b1)->ethernet.start_of_ethernet_header;
489 stats_n_packets += 2;
490 stats_n_bytes += len0 + len1;
493 (!(new_sw_if_index0 == stats_sw_if_index
494 && new_sw_if_index1 == stats_sw_if_index)))
496 stats_n_packets -= 2;
497 stats_n_bytes -= len0 + len1;
499 if (new_sw_if_index0 != old_sw_if_index0
500 && new_sw_if_index0 != ~0)
501 vlib_increment_combined_counter (vnm->
502 interface_main.combined_sw_if_counters
504 VNET_INTERFACE_COUNTER_RX,
508 if (new_sw_if_index1 != old_sw_if_index1
509 && new_sw_if_index1 != ~0)
510 vlib_increment_combined_counter (vnm->
511 interface_main.combined_sw_if_counters
513 VNET_INTERFACE_COUNTER_RX,
518 if (new_sw_if_index0 == new_sw_if_index1)
520 if (stats_n_packets > 0)
522 vlib_increment_combined_counter
523 (vnm->interface_main.combined_sw_if_counters
524 + VNET_INTERFACE_COUNTER_RX,
527 stats_n_packets, stats_n_bytes);
528 stats_n_packets = stats_n_bytes = 0;
530 stats_sw_if_index = new_sw_if_index0;
535 if (variant == ETHERNET_INPUT_VARIANT_NOT_L2)
538 determine_next_node (em, variant, is_l20, type0, b0, &error0,
540 determine_next_node (em, variant, is_l21, type1, b1, &error1,
543 b0->error = error_node->errors[error0];
544 b1->error = error_node->errors[error1];
547 // verify speculative enqueue
548 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
549 n_left_to_next, bi0, bi1, next0,
553 while (n_left_from > 0 && n_left_to_next > 0)
558 u16 type0, orig_type0;
559 u16 outer_id0, inner_id0;
561 u32 old_sw_if_index0, new_sw_if_index0, len0;
562 vnet_hw_interface_t *hi0;
563 main_intf_t *main_intf0;
564 vlan_intf_t *vlan_intf0;
565 qinq_intf_t *qinq_intf0;
566 ethernet_header_t *e0;
569 // Prefetch next iteration
574 p2 = vlib_get_buffer (vm, from[1]);
575 vlib_prefetch_buffer_header (p2, STORE);
576 CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD);
586 b0 = vlib_get_buffer (vm, bi0);
588 error0 = ETHERNET_ERROR_NONE;
589 e0 = vlib_buffer_get_current (b0);
590 type0 = clib_net_to_host_u16 (e0->type);
592 /* Speed-path for the untagged case */
593 if (PREDICT_TRUE (variant == ETHERNET_INPUT_VARIANT_ETHERNET
594 && !ethernet_frame_is_tagged (type0)))
597 subint_config_t *subint0;
600 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
601 is_l20 = cached_is_l2;
603 if (PREDICT_FALSE (cached_sw_if_index != sw_if_index0))
605 cached_sw_if_index = sw_if_index0;
606 hi0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
607 intf0 = vec_elt_at_index (em->main_intfs, hi0->hw_if_index);
608 subint0 = &intf0->untagged_subint;
609 cached_is_l2 = is_l20 = subint0->flags & SUBINT_CONFIG_L2;
612 vnet_buffer (b0)->ethernet.start_of_ethernet_header =
615 if (PREDICT_TRUE (is_l20 != 0))
618 vnet_buffer (b0)->l2.l2_len = sizeof (ethernet_header_t);
622 determine_next_node (em, variant, 0, type0, b0,
624 vlib_buffer_advance (b0, sizeof (ethernet_header_t));
629 /* Slow-path for the tagged case */
630 parse_header (variant,
633 &orig_type0, &outer_id0, &inner_id0, &match_flags0);
635 old_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
637 eth_vlan_table_lookups (em,
644 &main_intf0, &vlan_intf0, &qinq_intf0);
646 identify_subint (hi0,
651 qinq_intf0, &new_sw_if_index0, &error0, &is_l20);
653 // Save RX sw_if_index for later nodes
654 vnet_buffer (b0)->sw_if_index[VLIB_RX] =
656 ETHERNET_ERROR_NONE ? old_sw_if_index0 : new_sw_if_index0;
658 // Increment subinterface stats
659 // Note that interface-level counters have already been incremented
660 // prior to calling this function. Thus only subinterface counters
661 // are incremented here.
663 // Interface level counters include packets received on the main
664 // interface and all subinterfaces. Subinterface level counters
665 // include only those packets received on that subinterface
666 // Increment stats if the subint is valid and it is not the main intf
667 if ((new_sw_if_index0 != ~0)
668 && (new_sw_if_index0 != old_sw_if_index0))
671 len0 = vlib_buffer_length_in_chain (vm, b0) + b0->current_data
672 - vnet_buffer (b0)->ethernet.start_of_ethernet_header;
674 stats_n_packets += 1;
675 stats_n_bytes += len0;
677 // Batch stat increments from the same subinterface so counters
678 // don't need to be incremented for every packet.
679 if (PREDICT_FALSE (new_sw_if_index0 != stats_sw_if_index))
681 stats_n_packets -= 1;
682 stats_n_bytes -= len0;
684 if (new_sw_if_index0 != ~0)
685 vlib_increment_combined_counter
686 (vnm->interface_main.combined_sw_if_counters
687 + VNET_INTERFACE_COUNTER_RX,
688 cpu_index, new_sw_if_index0, 1, len0);
689 if (stats_n_packets > 0)
691 vlib_increment_combined_counter
692 (vnm->interface_main.combined_sw_if_counters
693 + VNET_INTERFACE_COUNTER_RX,
695 stats_sw_if_index, stats_n_packets, stats_n_bytes);
696 stats_n_packets = stats_n_bytes = 0;
698 stats_sw_if_index = new_sw_if_index0;
702 if (variant == ETHERNET_INPUT_VARIANT_NOT_L2)
705 determine_next_node (em, variant, is_l20, type0, b0, &error0,
708 b0->error = error_node->errors[error0];
710 // verify speculative enqueue
712 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
713 to_next, n_left_to_next,
717 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
720 // Increment any remaining batched stats
721 if (stats_n_packets > 0)
723 vlib_increment_combined_counter
724 (vnm->interface_main.combined_sw_if_counters
725 + VNET_INTERFACE_COUNTER_RX,
726 cpu_index, stats_sw_if_index, stats_n_packets, stats_n_bytes);
727 node->runtime_data[0] = stats_sw_if_index;
730 return from_frame->n_vectors;
734 ethernet_input (vlib_main_t * vm,
735 vlib_node_runtime_t * node, vlib_frame_t * from_frame)
737 return ethernet_input_inline (vm, node, from_frame,
738 ETHERNET_INPUT_VARIANT_ETHERNET);
742 ethernet_input_type (vlib_main_t * vm,
743 vlib_node_runtime_t * node, vlib_frame_t * from_frame)
745 return ethernet_input_inline (vm, node, from_frame,
746 ETHERNET_INPUT_VARIANT_ETHERNET_TYPE);
750 ethernet_input_not_l2 (vlib_main_t * vm,
751 vlib_node_runtime_t * node, vlib_frame_t * from_frame)
753 return ethernet_input_inline (vm, node, from_frame,
754 ETHERNET_INPUT_VARIANT_NOT_L2);
758 // Return the subinterface config struct for the given sw_if_index
759 // Also return via parameter the appropriate match flags for the
760 // configured number of tags.
761 // On error (unsupported or not ethernet) return 0.
762 static subint_config_t *
763 ethernet_sw_interface_get_config (vnet_main_t * vnm,
765 u32 * flags, u32 * unsupported)
767 ethernet_main_t *em = ðernet_main;
768 vnet_hw_interface_t *hi;
769 vnet_sw_interface_t *si;
770 main_intf_t *main_intf;
771 vlan_table_t *vlan_table;
772 qinq_table_t *qinq_table;
773 subint_config_t *subint = 0;
775 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
777 if (!hi || (hi->hw_class_index != ethernet_hw_interface_class.index))
780 goto done; // non-ethernet interface
783 // ensure there's an entry for the main intf (shouldn't really be necessary)
784 vec_validate (em->main_intfs, hi->hw_if_index);
785 main_intf = vec_elt_at_index (em->main_intfs, hi->hw_if_index);
787 // Locate the subint for the given ethernet config
788 si = vnet_get_sw_interface (vnm, sw_if_index);
790 if (si->sub.eth.flags.default_sub)
792 subint = &main_intf->default_subint;
793 *flags = SUBINT_CONFIG_MATCH_0_TAG |
794 SUBINT_CONFIG_MATCH_1_TAG |
795 SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG;
797 else if ((si->sub.eth.flags.no_tags) || (si->sub.eth.raw_flags == 0))
799 // if no flags are set then this is a main interface
800 // so treat as untagged
801 subint = &main_intf->untagged_subint;
802 *flags = SUBINT_CONFIG_MATCH_0_TAG;
807 // first get the vlan table
808 if (si->sub.eth.flags.dot1ad)
810 if (main_intf->dot1ad_vlans == 0)
812 // Allocate a vlan table from the pool
813 pool_get (em->vlan_pool, vlan_table);
814 main_intf->dot1ad_vlans = vlan_table - em->vlan_pool;
818 // Get ptr to existing vlan table
820 vec_elt_at_index (em->vlan_pool, main_intf->dot1ad_vlans);
825 if (main_intf->dot1q_vlans == 0)
827 // Allocate a vlan table from the pool
828 pool_get (em->vlan_pool, vlan_table);
829 main_intf->dot1q_vlans = vlan_table - em->vlan_pool;
833 // Get ptr to existing vlan table
835 vec_elt_at_index (em->vlan_pool, main_intf->dot1q_vlans);
839 if (si->sub.eth.flags.one_tag)
841 *flags = si->sub.eth.flags.exact_match ?
842 SUBINT_CONFIG_MATCH_1_TAG :
843 (SUBINT_CONFIG_MATCH_1_TAG |
844 SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG);
846 if (si->sub.eth.flags.outer_vlan_id_any)
848 // not implemented yet
854 // a single vlan, a common case
856 &vlan_table->vlans[si->sub.eth.
857 outer_vlan_id].single_tag_subint;
864 *flags = si->sub.eth.flags.exact_match ?
865 SUBINT_CONFIG_MATCH_2_TAG :
866 (SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG);
868 if (si->sub.eth.flags.outer_vlan_id_any
869 && si->sub.eth.flags.inner_vlan_id_any)
871 // not implemented yet
876 if (si->sub.eth.flags.inner_vlan_id_any)
878 // a specific outer and "any" inner
879 // don't need a qinq table for this
881 &vlan_table->vlans[si->sub.eth.
882 outer_vlan_id].inner_any_subint;
883 if (si->sub.eth.flags.exact_match)
885 *flags = SUBINT_CONFIG_MATCH_2_TAG;
889 *flags = SUBINT_CONFIG_MATCH_2_TAG |
890 SUBINT_CONFIG_MATCH_3_TAG;
895 // a specific outer + specifc innner vlan id, a common case
897 // get the qinq table
898 if (vlan_table->vlans[si->sub.eth.outer_vlan_id].qinqs == 0)
900 // Allocate a qinq table from the pool
901 pool_get (em->qinq_pool, qinq_table);
902 vlan_table->vlans[si->sub.eth.outer_vlan_id].qinqs =
903 qinq_table - em->qinq_pool;
907 // Get ptr to existing qinq table
909 vec_elt_at_index (em->qinq_pool,
910 vlan_table->vlans[si->sub.
914 subint = &qinq_table->vlans[si->sub.eth.inner_vlan_id].subint;
924 ethernet_sw_interface_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
926 subint_config_t *subint;
929 clib_error_t *error = 0;
931 // Find the config for this subinterface
933 ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags,
938 // not implemented yet or not ethernet
942 subint->sw_if_index =
943 ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ? sw_if_index : ~0);
949 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ethernet_sw_interface_up_down);
952 // Set the L2/L3 mode for the subinterface
954 ethernet_sw_interface_set_l2_mode (vnet_main_t * vnm, u32 sw_if_index, u32 l2)
956 subint_config_t *subint;
960 vnet_sw_interface_t *sw = vnet_get_sw_interface (vnm, sw_if_index);
962 is_port = !(sw->type == VNET_SW_INTERFACE_TYPE_SUB);
964 // Find the config for this subinterface
966 ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags,
971 // unimplemented or not ethernet
975 // Double check that the config we found is for our interface (or the interface is down)
976 ASSERT ((subint->sw_if_index == sw_if_index) | (subint->sw_if_index == ~0));
980 subint->flags |= SUBINT_CONFIG_L2;
983 SUBINT_CONFIG_MATCH_0_TAG | SUBINT_CONFIG_MATCH_1_TAG
984 | SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG;
988 subint->flags &= ~SUBINT_CONFIG_L2;
991 ~(SUBINT_CONFIG_MATCH_1_TAG | SUBINT_CONFIG_MATCH_2_TAG
992 | SUBINT_CONFIG_MATCH_3_TAG);
1000 * Set the L2/L3 mode for the subinterface regardless of port
1003 ethernet_sw_interface_set_l2_mode_noport (vnet_main_t * vnm,
1004 u32 sw_if_index, u32 l2)
1006 subint_config_t *subint;
1010 /* Find the config for this subinterface */
1012 ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags,
1017 /* unimplemented or not ethernet */
1022 * Double check that the config we found is for our interface (or the
1023 * interface is down)
1025 ASSERT ((subint->sw_if_index == sw_if_index) | (subint->sw_if_index == ~0));
1029 subint->flags |= SUBINT_CONFIG_L2;
1033 subint->flags &= ~SUBINT_CONFIG_L2;
1040 static clib_error_t *
1041 ethernet_sw_interface_add_del (vnet_main_t * vnm,
1042 u32 sw_if_index, u32 is_create)
1044 clib_error_t *error = 0;
1045 subint_config_t *subint;
1047 u32 unsupported = 0;
1049 // Find the config for this subinterface
1051 ethernet_sw_interface_get_config (vnm, sw_if_index, &match_flags,
1056 // not implemented yet or not ethernet
1059 // this is the NYI case
1060 error = clib_error_return (0, "not implemented yet");
1071 // Initialize the subint
1072 if (subint->flags & SUBINT_CONFIG_VALID)
1074 // Error vlan already in use
1075 error = clib_error_return (0, "vlan is already in use");
1079 // Note that config is L3 by defaulty
1080 subint->flags = SUBINT_CONFIG_VALID | match_flags;
1081 subint->sw_if_index = ~0; // because interfaces are initially down
1088 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ethernet_sw_interface_add_del);
1090 static char *ethernet_error_strings[] = {
1091 #define ethernet_error(n,c,s) s,
1092 #include "error.def"
1093 #undef ethernet_error
1097 VLIB_REGISTER_NODE (ethernet_input_node) = {
1098 .function = ethernet_input,
1099 .name = "ethernet-input",
1100 /* Takes a vector of packets. */
1101 .vector_size = sizeof (u32),
1102 .n_errors = ETHERNET_N_ERROR,
1103 .error_strings = ethernet_error_strings,
1104 .n_next_nodes = ETHERNET_INPUT_N_NEXT,
1106 #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
1107 foreach_ethernet_input_next
1110 .format_buffer = format_ethernet_header_with_length,
1111 .format_trace = format_ethernet_input_trace,
1112 .unformat_buffer = unformat_ethernet_header,
1117 VLIB_NODE_FUNCTION_MULTIARCH (ethernet_input_node, ethernet_input)
1121 VLIB_REGISTER_NODE (ethernet_input_type_node, static) = {
1122 .function = ethernet_input_type,
1123 .name = "ethernet-input-type",
1124 /* Takes a vector of packets. */
1125 .vector_size = sizeof (u32),
1126 .n_next_nodes = ETHERNET_INPUT_N_NEXT,
1128 #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
1129 foreach_ethernet_input_next
1136 VLIB_NODE_FUNCTION_MULTIARCH (ethernet_input_type_node, ethernet_input_type)
1140 VLIB_REGISTER_NODE (ethernet_input_not_l2_node, static) = {
1141 .function = ethernet_input_not_l2,
1142 .name = "ethernet-input-not-l2",
1143 /* Takes a vector of packets. */
1144 .vector_size = sizeof (u32),
1145 .n_next_nodes = ETHERNET_INPUT_N_NEXT,
1147 #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
1148 foreach_ethernet_input_next
1156 VLIB_NODE_FUNCTION_MULTIARCH (ethernet_input_not_l2_node,
1157 ethernet_input_not_l2)
1162 ethernet_set_rx_redirect (vnet_main_t * vnm,
1163 vnet_hw_interface_t * hi, u32 enable)
1165 // Insure all packets go to ethernet-input (i.e. untagged ipv4 packets
1166 // don't go directly to ip4-input)
1167 vnet_hw_interface_rx_redirect_to_node
1168 (vnm, hi->hw_if_index, enable ? ethernet_input_node.index : ~0);
1173 * Initialization and registration for the next_by_ethernet structure
1177 next_by_ethertype_init (next_by_ethertype_t * l3_next)
1179 l3_next->input_next_by_type = sparse_vec_new
1180 ( /* elt bytes */ sizeof (l3_next->input_next_by_type[0]),
1181 /* bits in index */ BITS (((ethernet_header_t *) 0)->type));
1183 vec_validate (l3_next->sparse_index_by_input_next_index,
1184 ETHERNET_INPUT_NEXT_DROP);
1185 vec_validate (l3_next->sparse_index_by_input_next_index,
1186 ETHERNET_INPUT_NEXT_PUNT);
1187 l3_next->sparse_index_by_input_next_index[ETHERNET_INPUT_NEXT_DROP] =
1188 SPARSE_VEC_INVALID_INDEX;
1189 l3_next->sparse_index_by_input_next_index[ETHERNET_INPUT_NEXT_PUNT] =
1190 SPARSE_VEC_INVALID_INDEX;
1193 * Make sure we don't wipe out an ethernet registration by mistake
1194 * Can happen if init function ordering constraints are missing.
1198 ethernet_main_t *em = ðernet_main;
1199 ASSERT (em->next_by_ethertype_register_called == 0);
1205 // Add an ethertype -> next index mapping to the structure
1207 next_by_ethertype_register (next_by_ethertype_t * l3_next,
1208 u32 ethertype, u32 next_index)
1212 ethernet_main_t *em = ðernet_main;
1216 ethernet_main_t *em = ðernet_main;
1217 em->next_by_ethertype_register_called = 1;
1220 /* Setup ethernet type -> next index sparse vector mapping. */
1221 n = sparse_vec_validate (l3_next->input_next_by_type, ethertype);
1224 /* Rebuild next index -> sparse index inverse mapping when sparse vector
1226 vec_validate (l3_next->sparse_index_by_input_next_index, next_index);
1227 for (i = 1; i < vec_len (l3_next->input_next_by_type); i++)
1229 sparse_index_by_input_next_index[l3_next->input_next_by_type[i]] = i;
1231 // do not allow the cached next index's to be updated if L3
1232 // redirect is enabled, as it will have overwritten them
1233 if (!em->redirect_l3)
1235 // Cache common ethertypes directly
1236 if (ethertype == ETHERNET_TYPE_IP4)
1238 l3_next->input_next_ip4 = next_index;
1240 else if (ethertype == ETHERNET_TYPE_IP6)
1242 l3_next->input_next_ip6 = next_index;
1244 else if (ethertype == ETHERNET_TYPE_MPLS_UNICAST)
1246 l3_next->input_next_mpls = next_index;
1253 static clib_error_t *
1254 ethernet_input_init (vlib_main_t * vm)
1256 ethernet_main_t *em = ðernet_main;
1257 __attribute__ ((unused)) vlan_table_t *invalid_vlan_table;
1258 __attribute__ ((unused)) qinq_table_t *invalid_qinq_table;
1260 ethernet_setup_node (vm, ethernet_input_node.index);
1261 ethernet_setup_node (vm, ethernet_input_type_node.index);
1262 ethernet_setup_node (vm, ethernet_input_not_l2_node.index);
1264 next_by_ethertype_init (&em->l3_next);
1266 // Initialize pools and vector for vlan parsing
1267 vec_validate (em->main_intfs, 10); // 10 main interfaces
1268 pool_alloc (em->vlan_pool, 10);
1269 pool_alloc (em->qinq_pool, 1);
1271 // The first vlan pool will always be reserved for an invalid table
1272 pool_get (em->vlan_pool, invalid_vlan_table); // first id = 0
1273 // The first qinq pool will always be reserved for an invalid table
1274 pool_get (em->qinq_pool, invalid_qinq_table); // first id = 0
1279 VLIB_INIT_FUNCTION (ethernet_input_init);
1282 ethernet_register_input_type (vlib_main_t * vm,
1283 ethernet_type_t type, u32 node_index)
1285 ethernet_main_t *em = ðernet_main;
1286 ethernet_type_info_t *ti;
1290 clib_error_t *error = vlib_call_init_function (vm, ethernet_init);
1292 clib_error_report (error);
1295 ti = ethernet_get_type_info (em, type);
1296 ti->node_index = node_index;
1297 ti->next_index = vlib_node_add_next (vm,
1298 ethernet_input_node.index, node_index);
1299 i = vlib_node_add_next (vm, ethernet_input_type_node.index, node_index);
1300 ASSERT (i == ti->next_index);
1302 i = vlib_node_add_next (vm, ethernet_input_not_l2_node.index, node_index);
1303 ASSERT (i == ti->next_index);
1305 // Add the L3 node for this ethertype to the next nodes structure
1306 next_by_ethertype_register (&em->l3_next, type, ti->next_index);
1308 // Call the registration functions for other nodes that want a mapping
1309 l2bvi_register_input_type (vm, type, node_index);
1313 ethernet_register_l2_input (vlib_main_t * vm, u32 node_index)
1315 ethernet_main_t *em = ðernet_main;
1319 vlib_node_add_next (vm, ethernet_input_node.index, node_index);
1322 * Even if we never use these arcs, we have to align the next indices...
1324 i = vlib_node_add_next (vm, ethernet_input_type_node.index, node_index);
1326 ASSERT (i == em->l2_next);
1328 i = vlib_node_add_next (vm, ethernet_input_not_l2_node.index, node_index);
1329 ASSERT (i == em->l2_next);
1332 // Register a next node for L3 redirect, and enable L3 redirect
1334 ethernet_register_l3_redirect (vlib_main_t * vm, u32 node_index)
1336 ethernet_main_t *em = ðernet_main;
1339 em->redirect_l3 = 1;
1340 em->redirect_l3_next = vlib_node_add_next (vm,
1341 ethernet_input_node.index,
1344 * Change the cached next nodes to the redirect node
1346 em->l3_next.input_next_ip4 = em->redirect_l3_next;
1347 em->l3_next.input_next_ip6 = em->redirect_l3_next;
1348 em->l3_next.input_next_mpls = em->redirect_l3_next;
1351 * Even if we never use these arcs, we have to align the next indices...
1353 i = vlib_node_add_next (vm, ethernet_input_type_node.index, node_index);
1355 ASSERT (i == em->redirect_l3_next);
1357 i = vlib_node_add_next (vm, ethernet_input_not_l2_node.index, node_index);
1359 ASSERT (i == em->redirect_l3_next);
1363 * fd.io coding-style-patch-verification: ON
1366 * eval: (c-set-style "gnu")