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 ();
296 if (variant != ETHERNET_INPUT_VARIANT_ETHERNET)
297 error_node = vlib_node_get_runtime (vm, ethernet_input_node.index);
301 from = vlib_frame_vector_args (from_frame);
302 n_left_from = from_frame->n_vectors;
304 if (node->flags & VLIB_NODE_FLAG_TRACE)
305 vlib_trace_frame_buffers_only (vm, node,
309 sizeof (ethernet_input_trace_t));
311 next_index = node->cached_next_index;
312 stats_sw_if_index = node->runtime_data[0];
313 stats_n_packets = stats_n_bytes = 0;
315 while (n_left_from > 0)
319 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
321 while (n_left_from >= 4 && n_left_to_next >= 2)
324 vlib_buffer_t *b0, *b1;
325 u8 next0, next1, error0, error1;
326 u16 type0, orig_type0, type1, orig_type1;
327 u16 outer_id0, inner_id0, outer_id1, inner_id1;
328 u32 match_flags0, match_flags1;
329 u32 old_sw_if_index0, new_sw_if_index0, len0, old_sw_if_index1,
330 new_sw_if_index1, len1;
331 vnet_hw_interface_t *hi0, *hi1;
332 main_intf_t *main_intf0, *main_intf1;
333 vlan_intf_t *vlan_intf0, *vlan_intf1;
334 qinq_intf_t *qinq_intf0, *qinq_intf1;
337 /* Prefetch next iteration. */
339 vlib_buffer_t *b2, *b3;
341 b2 = vlib_get_buffer (vm, from[2]);
342 b3 = vlib_get_buffer (vm, from[3]);
344 vlib_prefetch_buffer_header (b2, STORE);
345 vlib_prefetch_buffer_header (b3, STORE);
347 CLIB_PREFETCH (b2->data, sizeof (ethernet_header_t), LOAD);
348 CLIB_PREFETCH (b3->data, sizeof (ethernet_header_t), LOAD);
360 b0 = vlib_get_buffer (vm, bi0);
361 b1 = vlib_get_buffer (vm, bi1);
363 error0 = error1 = ETHERNET_ERROR_NONE;
365 parse_header (variant,
368 &orig_type0, &outer_id0, &inner_id0, &match_flags0);
370 parse_header (variant,
373 &orig_type1, &outer_id1, &inner_id1, &match_flags1);
375 old_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
376 old_sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
378 eth_vlan_table_lookups (em,
385 &main_intf0, &vlan_intf0, &qinq_intf0);
387 eth_vlan_table_lookups (em,
394 &main_intf1, &vlan_intf1, &qinq_intf1);
396 identify_subint (hi0,
401 qinq_intf0, &new_sw_if_index0, &error0, &is_l20);
403 identify_subint (hi1,
408 qinq_intf1, &new_sw_if_index1, &error1, &is_l21);
410 // Save RX sw_if_index for later nodes
411 vnet_buffer (b0)->sw_if_index[VLIB_RX] =
413 ETHERNET_ERROR_NONE ? old_sw_if_index0 : new_sw_if_index0;
414 vnet_buffer (b1)->sw_if_index[VLIB_RX] =
416 ETHERNET_ERROR_NONE ? old_sw_if_index1 : new_sw_if_index1;
418 // Check if there is a stat to take (valid and non-main sw_if_index for pkt 0 or pkt 1)
419 if (((new_sw_if_index0 != ~0)
420 && (new_sw_if_index0 != old_sw_if_index0))
421 || ((new_sw_if_index1 != ~0)
422 && (new_sw_if_index1 != old_sw_if_index1)))
425 len0 = vlib_buffer_length_in_chain (vm, b0) + b0->current_data
426 - vnet_buffer (b0)->ethernet.start_of_ethernet_header;
427 len1 = vlib_buffer_length_in_chain (vm, b1) + b1->current_data
428 - vnet_buffer (b1)->ethernet.start_of_ethernet_header;
430 stats_n_packets += 2;
431 stats_n_bytes += len0 + len1;
434 (!(new_sw_if_index0 == stats_sw_if_index
435 && new_sw_if_index1 == stats_sw_if_index)))
437 stats_n_packets -= 2;
438 stats_n_bytes -= len0 + len1;
440 if (new_sw_if_index0 != old_sw_if_index0
441 && new_sw_if_index0 != ~0)
442 vlib_increment_combined_counter (vnm->
443 interface_main.combined_sw_if_counters
445 VNET_INTERFACE_COUNTER_RX,
449 if (new_sw_if_index1 != old_sw_if_index1
450 && new_sw_if_index1 != ~0)
451 vlib_increment_combined_counter (vnm->
452 interface_main.combined_sw_if_counters
454 VNET_INTERFACE_COUNTER_RX,
459 if (new_sw_if_index0 == new_sw_if_index1)
461 if (stats_n_packets > 0)
463 vlib_increment_combined_counter
464 (vnm->interface_main.combined_sw_if_counters
465 + VNET_INTERFACE_COUNTER_RX,
468 stats_n_packets, stats_n_bytes);
469 stats_n_packets = stats_n_bytes = 0;
471 stats_sw_if_index = new_sw_if_index0;
476 if (variant == ETHERNET_INPUT_VARIANT_NOT_L2)
479 determine_next_node (em, variant, is_l20, type0, b0, &error0,
481 determine_next_node (em, variant, is_l21, type1, b1, &error1,
484 b0->error = error_node->errors[error0];
485 b1->error = error_node->errors[error1];
487 // verify speculative enqueue
488 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
489 n_left_to_next, bi0, bi1, next0,
493 while (n_left_from > 0 && n_left_to_next > 0)
498 u16 type0, orig_type0;
499 u16 outer_id0, inner_id0;
501 u32 old_sw_if_index0, new_sw_if_index0, len0;
502 vnet_hw_interface_t *hi0;
503 main_intf_t *main_intf0;
504 vlan_intf_t *vlan_intf0;
505 qinq_intf_t *qinq_intf0;
508 // Prefetch next iteration
513 p2 = vlib_get_buffer (vm, from[1]);
514 vlib_prefetch_buffer_header (p2, STORE);
515 CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD);
525 b0 = vlib_get_buffer (vm, bi0);
527 error0 = ETHERNET_ERROR_NONE;
529 parse_header (variant,
532 &orig_type0, &outer_id0, &inner_id0, &match_flags0);
534 old_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
536 eth_vlan_table_lookups (em,
543 &main_intf0, &vlan_intf0, &qinq_intf0);
545 identify_subint (hi0,
550 qinq_intf0, &new_sw_if_index0, &error0, &is_l20);
552 // Save RX sw_if_index for later nodes
553 vnet_buffer (b0)->sw_if_index[VLIB_RX] =
555 ETHERNET_ERROR_NONE ? old_sw_if_index0 : new_sw_if_index0;
557 // Increment subinterface stats
558 // Note that interface-level counters have already been incremented
559 // prior to calling this function. Thus only subinterface counters
560 // are incremented here.
562 // Interface level counters include packets received on the main
563 // interface and all subinterfaces. Subinterface level counters
564 // include only those packets received on that subinterface
565 // Increment stats if the subint is valid and it is not the main intf
566 if ((new_sw_if_index0 != ~0)
567 && (new_sw_if_index0 != old_sw_if_index0))
570 len0 = vlib_buffer_length_in_chain (vm, b0) + b0->current_data
571 - vnet_buffer (b0)->ethernet.start_of_ethernet_header;
573 stats_n_packets += 1;
574 stats_n_bytes += len0;
576 // Batch stat increments from the same subinterface so counters
577 // don't need to be incremented for every packet.
578 if (PREDICT_FALSE (new_sw_if_index0 != stats_sw_if_index))
580 stats_n_packets -= 1;
581 stats_n_bytes -= len0;
583 if (new_sw_if_index0 != ~0)
584 vlib_increment_combined_counter
585 (vnm->interface_main.combined_sw_if_counters
586 + VNET_INTERFACE_COUNTER_RX,
587 cpu_index, new_sw_if_index0, 1, len0);
588 if (stats_n_packets > 0)
590 vlib_increment_combined_counter
591 (vnm->interface_main.combined_sw_if_counters
592 + VNET_INTERFACE_COUNTER_RX,
594 stats_sw_if_index, stats_n_packets, stats_n_bytes);
595 stats_n_packets = stats_n_bytes = 0;
597 stats_sw_if_index = new_sw_if_index0;
601 if (variant == ETHERNET_INPUT_VARIANT_NOT_L2)
604 determine_next_node (em, variant, is_l20, type0, b0, &error0,
607 b0->error = error_node->errors[error0];
609 // verify speculative enqueue
610 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
611 to_next, n_left_to_next,
615 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
618 // Increment any remaining batched stats
619 if (stats_n_packets > 0)
621 vlib_increment_combined_counter
622 (vnm->interface_main.combined_sw_if_counters
623 + VNET_INTERFACE_COUNTER_RX,
624 cpu_index, stats_sw_if_index, stats_n_packets, stats_n_bytes);
625 node->runtime_data[0] = stats_sw_if_index;
628 return from_frame->n_vectors;
632 ethernet_input (vlib_main_t * vm,
633 vlib_node_runtime_t * node, vlib_frame_t * from_frame)
635 return ethernet_input_inline (vm, node, from_frame,
636 ETHERNET_INPUT_VARIANT_ETHERNET);
640 ethernet_input_type (vlib_main_t * vm,
641 vlib_node_runtime_t * node, vlib_frame_t * from_frame)
643 return ethernet_input_inline (vm, node, from_frame,
644 ETHERNET_INPUT_VARIANT_ETHERNET_TYPE);
648 ethernet_input_not_l2 (vlib_main_t * vm,
649 vlib_node_runtime_t * node, vlib_frame_t * from_frame)
651 return ethernet_input_inline (vm, node, from_frame,
652 ETHERNET_INPUT_VARIANT_NOT_L2);
656 // Return the subinterface config struct for the given sw_if_index
657 // Also return via parameter the appropriate match flags for the
658 // configured number of tags.
659 // On error (unsupported or not ethernet) return 0.
660 static subint_config_t *
661 ethernet_sw_interface_get_config (vnet_main_t * vnm,
663 u32 * flags, u32 * unsupported)
665 ethernet_main_t *em = ðernet_main;
666 vnet_hw_interface_t *hi;
667 vnet_sw_interface_t *si;
668 main_intf_t *main_intf;
669 vlan_table_t *vlan_table;
670 qinq_table_t *qinq_table;
671 subint_config_t *subint = 0;
673 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
675 if (!hi || (hi->hw_class_index != ethernet_hw_interface_class.index))
678 goto done; // non-ethernet interface
681 // ensure there's an entry for the main intf (shouldn't really be necessary)
682 vec_validate (em->main_intfs, hi->hw_if_index);
683 main_intf = vec_elt_at_index (em->main_intfs, hi->hw_if_index);
685 // Locate the subint for the given ethernet config
686 si = vnet_get_sw_interface (vnm, sw_if_index);
688 if (si->sub.eth.flags.default_sub)
690 subint = &main_intf->default_subint;
691 *flags = SUBINT_CONFIG_MATCH_0_TAG |
692 SUBINT_CONFIG_MATCH_1_TAG |
693 SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG;
695 else if ((si->sub.eth.flags.no_tags) || (si->sub.eth.raw_flags == 0))
697 // if no flags are set then this is a main interface
698 // so treat as untagged
699 subint = &main_intf->untagged_subint;
700 *flags = SUBINT_CONFIG_MATCH_0_TAG;
705 // first get the vlan table
706 if (si->sub.eth.flags.dot1ad)
708 if (main_intf->dot1ad_vlans == 0)
710 // Allocate a vlan table from the pool
711 pool_get (em->vlan_pool, vlan_table);
712 main_intf->dot1ad_vlans = vlan_table - em->vlan_pool;
716 // Get ptr to existing vlan table
718 vec_elt_at_index (em->vlan_pool, main_intf->dot1ad_vlans);
723 if (main_intf->dot1q_vlans == 0)
725 // Allocate a vlan table from the pool
726 pool_get (em->vlan_pool, vlan_table);
727 main_intf->dot1q_vlans = vlan_table - em->vlan_pool;
731 // Get ptr to existing vlan table
733 vec_elt_at_index (em->vlan_pool, main_intf->dot1q_vlans);
737 if (si->sub.eth.flags.one_tag)
739 *flags = si->sub.eth.flags.exact_match ?
740 SUBINT_CONFIG_MATCH_1_TAG :
741 (SUBINT_CONFIG_MATCH_1_TAG |
742 SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG);
744 if (si->sub.eth.flags.outer_vlan_id_any)
746 // not implemented yet
752 // a single vlan, a common case
754 &vlan_table->vlans[si->sub.eth.
755 outer_vlan_id].single_tag_subint;
762 *flags = si->sub.eth.flags.exact_match ?
763 SUBINT_CONFIG_MATCH_2_TAG :
764 (SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG);
766 if (si->sub.eth.flags.outer_vlan_id_any
767 && si->sub.eth.flags.inner_vlan_id_any)
769 // not implemented yet
774 if (si->sub.eth.flags.inner_vlan_id_any)
776 // a specific outer and "any" inner
777 // don't need a qinq table for this
779 &vlan_table->vlans[si->sub.eth.
780 outer_vlan_id].inner_any_subint;
781 if (si->sub.eth.flags.exact_match)
783 *flags = SUBINT_CONFIG_MATCH_2_TAG;
787 *flags = SUBINT_CONFIG_MATCH_2_TAG |
788 SUBINT_CONFIG_MATCH_3_TAG;
793 // a specific outer + specifc innner vlan id, a common case
795 // get the qinq table
796 if (vlan_table->vlans[si->sub.eth.outer_vlan_id].qinqs == 0)
798 // Allocate a qinq table from the pool
799 pool_get (em->qinq_pool, qinq_table);
800 vlan_table->vlans[si->sub.eth.outer_vlan_id].qinqs =
801 qinq_table - em->qinq_pool;
805 // Get ptr to existing qinq table
807 vec_elt_at_index (em->qinq_pool,
808 vlan_table->vlans[si->sub.
812 subint = &qinq_table->vlans[si->sub.eth.inner_vlan_id].subint;
822 ethernet_sw_interface_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
824 subint_config_t *subint;
827 clib_error_t *error = 0;
829 // Find the config for this subinterface
831 ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags,
836 // not implemented yet or not ethernet
840 subint->sw_if_index =
841 ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ? sw_if_index : ~0);
847 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ethernet_sw_interface_up_down);
850 // Set the L2/L3 mode for the subinterface
852 ethernet_sw_interface_set_l2_mode (vnet_main_t * vnm, u32 sw_if_index, u32 l2)
854 subint_config_t *subint;
858 vnet_sw_interface_t *sw = vnet_get_sw_interface (vnm, sw_if_index);
860 is_port = !(sw->type == VNET_SW_INTERFACE_TYPE_SUB);
862 // Find the config for this subinterface
864 ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags,
869 // unimplemented or not ethernet
873 // Double check that the config we found is for our interface (or the interface is down)
874 ASSERT ((subint->sw_if_index == sw_if_index) | (subint->sw_if_index == ~0));
878 subint->flags |= SUBINT_CONFIG_L2;
881 SUBINT_CONFIG_MATCH_0_TAG | SUBINT_CONFIG_MATCH_1_TAG
882 | SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG;
886 subint->flags &= ~SUBINT_CONFIG_L2;
889 ~(SUBINT_CONFIG_MATCH_1_TAG | SUBINT_CONFIG_MATCH_2_TAG
890 | SUBINT_CONFIG_MATCH_3_TAG);
898 * Set the L2/L3 mode for the subinterface regardless of port
901 ethernet_sw_interface_set_l2_mode_noport (vnet_main_t * vnm,
902 u32 sw_if_index, u32 l2)
904 subint_config_t *subint;
908 /* Find the config for this subinterface */
910 ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags,
915 /* unimplemented or not ethernet */
920 * Double check that the config we found is for our interface (or the
923 ASSERT ((subint->sw_if_index == sw_if_index) | (subint->sw_if_index == ~0));
927 subint->flags |= SUBINT_CONFIG_L2;
931 subint->flags &= ~SUBINT_CONFIG_L2;
938 static clib_error_t *
939 ethernet_sw_interface_add_del (vnet_main_t * vnm,
940 u32 sw_if_index, u32 is_create)
942 clib_error_t *error = 0;
943 subint_config_t *subint;
947 // Find the config for this subinterface
949 ethernet_sw_interface_get_config (vnm, sw_if_index, &match_flags,
954 // not implemented yet or not ethernet
957 // this is the NYI case
958 error = clib_error_return (0, "not implemented yet");
969 // Initialize the subint
970 if (subint->flags & SUBINT_CONFIG_VALID)
972 // Error vlan already in use
973 error = clib_error_return (0, "vlan is already in use");
977 // Note that config is L3 by defaulty
978 subint->flags = SUBINT_CONFIG_VALID | match_flags;
979 subint->sw_if_index = ~0; // because interfaces are initially down
986 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ethernet_sw_interface_add_del);
988 static char *ethernet_error_strings[] = {
989 #define ethernet_error(n,c,s) s,
991 #undef ethernet_error
995 VLIB_REGISTER_NODE (ethernet_input_node) = {
996 .function = ethernet_input,
997 .name = "ethernet-input",
998 /* Takes a vector of packets. */
999 .vector_size = sizeof (u32),
1000 .n_errors = ETHERNET_N_ERROR,
1001 .error_strings = ethernet_error_strings,
1002 .n_next_nodes = ETHERNET_INPUT_N_NEXT,
1004 #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
1005 foreach_ethernet_input_next
1008 .format_buffer = format_ethernet_header_with_length,
1009 .format_trace = format_ethernet_input_trace,
1010 .unformat_buffer = unformat_ethernet_header,
1015 VLIB_NODE_FUNCTION_MULTIARCH (ethernet_input_node, ethernet_input)
1019 VLIB_REGISTER_NODE (ethernet_input_type_node, static) = {
1020 .function = ethernet_input_type,
1021 .name = "ethernet-input-type",
1022 /* Takes a vector of packets. */
1023 .vector_size = sizeof (u32),
1024 .n_next_nodes = ETHERNET_INPUT_N_NEXT,
1026 #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
1027 foreach_ethernet_input_next
1034 VLIB_NODE_FUNCTION_MULTIARCH (ethernet_input_type_node, ethernet_input_type)
1038 VLIB_REGISTER_NODE (ethernet_input_not_l2_node, static) = {
1039 .function = ethernet_input_not_l2,
1040 .name = "ethernet-input-not-l2",
1041 /* Takes a vector of packets. */
1042 .vector_size = sizeof (u32),
1043 .n_next_nodes = ETHERNET_INPUT_N_NEXT,
1045 #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
1046 foreach_ethernet_input_next
1054 VLIB_NODE_FUNCTION_MULTIARCH (ethernet_input_not_l2_node,
1055 ethernet_input_not_l2)
1060 ethernet_set_rx_redirect (vnet_main_t * vnm,
1061 vnet_hw_interface_t * hi, u32 enable)
1063 // Insure all packets go to ethernet-input (i.e. untagged ipv4 packets
1064 // don't go directly to ip4-input)
1065 vnet_hw_interface_rx_redirect_to_node
1066 (vnm, hi->hw_if_index, enable ? ethernet_input_node.index : ~0);
1071 * Initialization and registration for the next_by_ethernet structure
1075 next_by_ethertype_init (next_by_ethertype_t * l3_next)
1077 l3_next->input_next_by_type = sparse_vec_new
1078 ( /* elt bytes */ sizeof (l3_next->input_next_by_type[0]),
1079 /* bits in index */ BITS (((ethernet_header_t *) 0)->type));
1081 vec_validate (l3_next->sparse_index_by_input_next_index,
1082 ETHERNET_INPUT_NEXT_DROP);
1083 vec_validate (l3_next->sparse_index_by_input_next_index,
1084 ETHERNET_INPUT_NEXT_PUNT);
1085 l3_next->sparse_index_by_input_next_index[ETHERNET_INPUT_NEXT_DROP] =
1086 SPARSE_VEC_INVALID_INDEX;
1087 l3_next->sparse_index_by_input_next_index[ETHERNET_INPUT_NEXT_PUNT] =
1088 SPARSE_VEC_INVALID_INDEX;
1091 * Make sure we don't wipe out an ethernet registration by mistake
1092 * Can happen if init function ordering constraints are missing.
1096 ethernet_main_t *em = ðernet_main;
1097 ASSERT (em->next_by_ethertype_register_called == 0);
1103 // Add an ethertype -> next index mapping to the structure
1105 next_by_ethertype_register (next_by_ethertype_t * l3_next,
1106 u32 ethertype, u32 next_index)
1110 ethernet_main_t *em = ðernet_main;
1114 ethernet_main_t *em = ðernet_main;
1115 em->next_by_ethertype_register_called = 1;
1118 /* Setup ethernet type -> next index sparse vector mapping. */
1119 n = sparse_vec_validate (l3_next->input_next_by_type, ethertype);
1122 /* Rebuild next index -> sparse index inverse mapping when sparse vector
1124 vec_validate (l3_next->sparse_index_by_input_next_index, next_index);
1125 for (i = 1; i < vec_len (l3_next->input_next_by_type); i++)
1127 sparse_index_by_input_next_index[l3_next->input_next_by_type[i]] = i;
1129 // do not allow the cached next index's to be updated if L3
1130 // redirect is enabled, as it will have overwritten them
1131 if (!em->redirect_l3)
1133 // Cache common ethertypes directly
1134 if (ethertype == ETHERNET_TYPE_IP4)
1136 l3_next->input_next_ip4 = next_index;
1138 else if (ethertype == ETHERNET_TYPE_IP6)
1140 l3_next->input_next_ip6 = next_index;
1142 else if (ethertype == ETHERNET_TYPE_MPLS_UNICAST)
1144 l3_next->input_next_mpls = next_index;
1151 static clib_error_t *
1152 ethernet_input_init (vlib_main_t * vm)
1154 ethernet_main_t *em = ðernet_main;
1155 __attribute__ ((unused)) vlan_table_t *invalid_vlan_table;
1156 __attribute__ ((unused)) qinq_table_t *invalid_qinq_table;
1158 ethernet_setup_node (vm, ethernet_input_node.index);
1159 ethernet_setup_node (vm, ethernet_input_type_node.index);
1160 ethernet_setup_node (vm, ethernet_input_not_l2_node.index);
1162 next_by_ethertype_init (&em->l3_next);
1164 // Initialize pools and vector for vlan parsing
1165 vec_validate (em->main_intfs, 10); // 10 main interfaces
1166 pool_alloc (em->vlan_pool, 10);
1167 pool_alloc (em->qinq_pool, 1);
1169 // The first vlan pool will always be reserved for an invalid table
1170 pool_get (em->vlan_pool, invalid_vlan_table); // first id = 0
1171 // The first qinq pool will always be reserved for an invalid table
1172 pool_get (em->qinq_pool, invalid_qinq_table); // first id = 0
1177 VLIB_INIT_FUNCTION (ethernet_input_init);
1180 ethernet_register_input_type (vlib_main_t * vm,
1181 ethernet_type_t type, u32 node_index)
1183 ethernet_main_t *em = ðernet_main;
1184 ethernet_type_info_t *ti;
1188 clib_error_t *error = vlib_call_init_function (vm, ethernet_init);
1190 clib_error_report (error);
1193 ti = ethernet_get_type_info (em, type);
1194 ti->node_index = node_index;
1195 ti->next_index = vlib_node_add_next (vm,
1196 ethernet_input_node.index, node_index);
1197 i = vlib_node_add_next (vm, ethernet_input_type_node.index, node_index);
1198 ASSERT (i == ti->next_index);
1200 i = vlib_node_add_next (vm, ethernet_input_not_l2_node.index, node_index);
1201 ASSERT (i == ti->next_index);
1203 // Add the L3 node for this ethertype to the next nodes structure
1204 next_by_ethertype_register (&em->l3_next, type, ti->next_index);
1206 // Call the registration functions for other nodes that want a mapping
1207 l2bvi_register_input_type (vm, type, node_index);
1211 ethernet_register_l2_input (vlib_main_t * vm, u32 node_index)
1213 ethernet_main_t *em = ðernet_main;
1217 vlib_node_add_next (vm, ethernet_input_node.index, node_index);
1220 * Even if we never use these arcs, we have to align the next indices...
1222 i = vlib_node_add_next (vm, ethernet_input_type_node.index, node_index);
1224 ASSERT (i == em->l2_next);
1226 i = vlib_node_add_next (vm, ethernet_input_not_l2_node.index, node_index);
1227 ASSERT (i == em->l2_next);
1230 // Register a next node for L3 redirect, and enable L3 redirect
1232 ethernet_register_l3_redirect (vlib_main_t * vm, u32 node_index)
1234 ethernet_main_t *em = ðernet_main;
1237 em->redirect_l3 = 1;
1238 em->redirect_l3_next = vlib_node_add_next (vm,
1239 ethernet_input_node.index,
1242 * Change the cached next nodes to the redirect node
1244 em->l3_next.input_next_ip4 = em->redirect_l3_next;
1245 em->l3_next.input_next_ip6 = em->redirect_l3_next;
1246 em->l3_next.input_next_mpls = em->redirect_l3_next;
1249 * Even if we never use these arcs, we have to align the next indices...
1251 i = vlib_node_add_next (vm, ethernet_input_type_node.index, node_index);
1253 ASSERT (i == em->redirect_l3_next);
1257 * fd.io coding-style-patch-verification: ON
1260 * eval: (c-set-style "gnu")