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") \
53 #define _(s,n) ETHERNET_INPUT_NEXT_##s,
54 foreach_ethernet_input_next
56 ETHERNET_INPUT_N_NEXT,
57 } ethernet_input_next_t;
61 } ethernet_input_trace_t;
63 static u8 * format_ethernet_input_trace (u8 * s, va_list * va)
65 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
66 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
67 ethernet_input_trace_t * t = va_arg (*va, ethernet_input_trace_t *);
69 s = format (s, "%U", format_ethernet_header, t->packet_data);
74 vlib_node_registration_t ethernet_input_node;
77 ETHERNET_INPUT_VARIANT_ETHERNET,
78 ETHERNET_INPUT_VARIANT_ETHERNET_TYPE,
79 ETHERNET_INPUT_VARIANT_VLAN,
80 ETHERNET_INPUT_VARIANT_NOT_L2,
81 } ethernet_input_variant_t;
84 // Parse the ethernet header to extract vlan tags and innermost ethertype
85 static_always_inline void
86 parse_header (ethernet_input_variant_t variant,
95 if (variant == ETHERNET_INPUT_VARIANT_ETHERNET
96 || variant == ETHERNET_INPUT_VARIANT_NOT_L2) {
97 ethernet_header_t * e0;
99 e0 = (void *) (b0->data + b0->current_data);
101 vnet_buffer (b0)->ethernet.start_of_ethernet_header = b0->current_data;
103 vlib_buffer_advance (b0, sizeof (e0[0]));
105 *type = clib_net_to_host_u16(e0->type);
106 } else if (variant == ETHERNET_INPUT_VARIANT_ETHERNET_TYPE) {
107 // here when prior node was LLC/SNAP processing
110 e0 = (void *) (b0->data + b0->current_data);
112 vlib_buffer_advance (b0, sizeof (e0[0]));
114 *type = clib_net_to_host_u16(e0[0]);
117 // save for distinguishing between dot1q and dot1ad later
120 // default the tags to 0 (used if there is no corresponding tag)
124 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_0_TAG;
127 // check for vlan encaps
128 if ((*type == ETHERNET_TYPE_VLAN) ||
129 (*type == ETHERNET_TYPE_DOT1AD) ||
130 (*type == ETHERNET_TYPE_VLAN_9100) ||
131 (*type == ETHERNET_TYPE_VLAN_9200))
133 ethernet_vlan_header_t * h0;
136 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_1_TAG;
138 h0 = (void *) (b0->data + b0->current_data);
140 tag = clib_net_to_host_u16 (h0->priority_cfi_and_id);
142 *outer_id = tag & 0xfff;
144 *type = clib_net_to_host_u16(h0->type);
146 vlib_buffer_advance (b0, sizeof (h0[0]));
149 if (*type == ETHERNET_TYPE_VLAN) {
150 // Double tagged packet
151 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_2_TAG;
153 h0 = (void *) (b0->data + b0->current_data);
155 tag = clib_net_to_host_u16 (h0->priority_cfi_and_id);
157 *inner_id = tag & 0xfff;
159 *type = clib_net_to_host_u16(h0->type);
161 vlib_buffer_advance (b0, sizeof (h0[0]));
164 if (*type == ETHERNET_TYPE_VLAN) {
165 // More than double tagged packet
166 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_3_TAG;
167 vlan_count = 3; // "unknown" number, aka, 3-or-more
171 ethernet_buffer_set_vlan_count(b0, vlan_count);
174 // Determine the subinterface for this packet, given the result of the
175 // vlan table lookups and vlan header parsing. Check the most specific
177 static_always_inline void
178 identify_subint (vnet_hw_interface_t * hi,
181 main_intf_t * main_intf,
182 vlan_intf_t * vlan_intf,
183 qinq_intf_t * qinq_intf,
184 u32 * new_sw_if_index,
190 matched = eth_identify_subint (hi, b0, match_flags,
191 main_intf, vlan_intf, qinq_intf,
192 new_sw_if_index, error0, is_l2);
196 // Perform L3 my-mac filter
197 // A unicast packet arriving on an L3 interface must have a dmac matching the interface mac.
198 // This is required for promiscuous mode, else we will forward packets we aren't supposed to.
200 ethernet_header_t * e0;
201 e0 = (void *) (b0->data + vnet_buffer (b0)->ethernet.start_of_ethernet_header);
203 if (!(ethernet_address_cast(e0->dst_address))) {
204 if (!eth_mac_equal((u8 *)e0, hi->hw_address)) {
205 *error0 = ETHERNET_ERROR_L3_MAC_MISMATCH;
210 // Check for down subinterface
211 *error0 = (*new_sw_if_index) != ~0 ? (*error0) : ETHERNET_ERROR_DOWN;
215 static_always_inline void
216 determine_next_node (ethernet_main_t * em,
217 ethernet_input_variant_t variant,
224 if (PREDICT_FALSE (*error0 != ETHERNET_ERROR_NONE)) {
225 // some error occurred
226 *next0 = ETHERNET_INPUT_NEXT_DROP;
228 *next0 = em->l2_next;
229 // record the L2 len and reset the buffer so the L2 header is preserved
230 vnet_buffer(b0)->l2.l2_len = b0->current_data;
231 vlib_buffer_advance(b0, - ethernet_buffer_header_size(b0));
233 // check for common IP/MPLS ethertypes
234 } else if (type0 == ETHERNET_TYPE_IP4) {
235 *next0 = em->l3_next.input_next_ip4;
236 } else if (type0 == ETHERNET_TYPE_IP6) {
237 *next0 = em->l3_next.input_next_ip6;
238 } else if (type0 == ETHERNET_TYPE_MPLS_UNICAST) {
239 *next0 = em->l3_next.input_next_mpls;
241 } else if (em->redirect_l3) {
242 // L3 Redirect is on, the cached common next nodes will be
243 // pointing to the redirect node, catch the uncommon types here
244 *next0 = em->redirect_l3_next;
246 // uncommon ethertype, check table
248 i0 = sparse_vec_index (em->l3_next.input_next_by_type, type0);
249 *next0 = vec_elt (em->l3_next.input_next_by_type, i0);
250 *error0 = i0 == SPARSE_VEC_INVALID_INDEX ? ETHERNET_ERROR_UNKNOWN_TYPE : *error0;
252 // The table is not populated with LLC values, so check that now.
253 // If variant is variant_ethernet then we came from LLC processing. Don't
254 // go back there; drop instead using by keeping the drop/bad table result.
255 if ((type0 < 0x600) && (variant == ETHERNET_INPUT_VARIANT_ETHERNET)) {
256 *next0 = ETHERNET_INPUT_NEXT_LLC;
261 static_always_inline uword
262 ethernet_input_inline (vlib_main_t * vm,
263 vlib_node_runtime_t * node,
264 vlib_frame_t * from_frame,
265 ethernet_input_variant_t variant)
267 vnet_main_t * vnm = vnet_get_main();
268 ethernet_main_t * em = ðernet_main;
269 vlib_node_runtime_t * error_node;
270 u32 n_left_from, next_index, * from, * to_next;
271 u32 stats_sw_if_index, stats_n_packets, stats_n_bytes;
272 u32 cpu_index = os_get_cpu_number();
274 if (variant != ETHERNET_INPUT_VARIANT_ETHERNET)
275 error_node = vlib_node_get_runtime (vm, ethernet_input_node.index);
279 from = vlib_frame_vector_args (from_frame);
280 n_left_from = from_frame->n_vectors;
282 if (node->flags & VLIB_NODE_FLAG_TRACE)
283 vlib_trace_frame_buffers_only (vm, node,
287 sizeof (ethernet_input_trace_t));
289 next_index = node->cached_next_index;
290 stats_sw_if_index = node->runtime_data[0];
291 stats_n_packets = stats_n_bytes = 0;
293 while (n_left_from > 0)
297 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
299 while (n_left_from >= 4 && n_left_to_next >= 2)
302 vlib_buffer_t * b0, * b1;
303 u8 next0, next1, error0, error1;
304 u16 type0, orig_type0, type1, orig_type1;
305 u16 outer_id0, inner_id0, outer_id1, inner_id1;
306 u32 match_flags0, match_flags1;
307 u32 old_sw_if_index0, new_sw_if_index0, len0, old_sw_if_index1, new_sw_if_index1, len1;
308 vnet_hw_interface_t * hi0, * hi1;
309 main_intf_t * main_intf0, * main_intf1;
310 vlan_intf_t * vlan_intf0, * vlan_intf1;
311 qinq_intf_t * qinq_intf0, * qinq_intf1;
314 /* Prefetch next iteration. */
316 vlib_buffer_t * b2, * b3;
318 b2 = vlib_get_buffer (vm, from[2]);
319 b3 = vlib_get_buffer (vm, from[3]);
321 vlib_prefetch_buffer_header (b2, STORE);
322 vlib_prefetch_buffer_header (b3, STORE);
324 CLIB_PREFETCH (b2->data, sizeof (ethernet_header_t), LOAD);
325 CLIB_PREFETCH (b3->data, sizeof (ethernet_header_t), LOAD);
337 b0 = vlib_get_buffer (vm, bi0);
338 b1 = vlib_get_buffer (vm, bi1);
340 error0 = error1 = ETHERNET_ERROR_NONE;
342 parse_header (variant,
350 parse_header (variant,
358 old_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
359 old_sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
361 eth_vlan_table_lookups (em,
372 eth_vlan_table_lookups (em,
383 identify_subint (hi0,
393 identify_subint (hi1,
403 // Save RX sw_if_index for later nodes
404 vnet_buffer (b0)->sw_if_index[VLIB_RX] = error0 != ETHERNET_ERROR_NONE ? old_sw_if_index0 : new_sw_if_index0;
405 vnet_buffer (b1)->sw_if_index[VLIB_RX] = error1 != ETHERNET_ERROR_NONE ? old_sw_if_index1 : new_sw_if_index1;
407 // Check if there is a stat to take (valid and non-main sw_if_index for pkt 0 or pkt 1)
408 if (((new_sw_if_index0 != ~0) && (new_sw_if_index0 != old_sw_if_index0)) ||
409 ((new_sw_if_index1 != ~0) && (new_sw_if_index1 != old_sw_if_index1))) {
411 len0 = vlib_buffer_length_in_chain (vm, b0) + b0->current_data
412 - vnet_buffer (b0)->ethernet.start_of_ethernet_header;
413 len1 = vlib_buffer_length_in_chain (vm, b1) + b1->current_data
414 - vnet_buffer (b1)->ethernet.start_of_ethernet_header;
416 stats_n_packets += 2;
417 stats_n_bytes += len0 + len1;
419 if (PREDICT_FALSE (! (new_sw_if_index0 == stats_sw_if_index && new_sw_if_index1 == stats_sw_if_index)))
421 stats_n_packets -= 2;
422 stats_n_bytes -= len0 + len1;
424 if (new_sw_if_index0 != old_sw_if_index0 && new_sw_if_index0 != ~0)
425 vlib_increment_combined_counter
426 (vnm->interface_main.combined_sw_if_counters
427 + VNET_INTERFACE_COUNTER_RX,
432 if (new_sw_if_index1 != old_sw_if_index1 && new_sw_if_index1 != ~0)
433 vlib_increment_combined_counter
434 (vnm->interface_main.combined_sw_if_counters
435 + VNET_INTERFACE_COUNTER_RX,
441 if (new_sw_if_index0 == new_sw_if_index1)
443 if (stats_n_packets > 0)
445 vlib_increment_combined_counter
446 (vnm->interface_main.combined_sw_if_counters
447 + VNET_INTERFACE_COUNTER_RX,
452 stats_n_packets = stats_n_bytes = 0;
454 stats_sw_if_index = new_sw_if_index0;
459 if (variant == ETHERNET_INPUT_VARIANT_NOT_L2)
462 determine_next_node(em, variant, is_l20, type0, b0, &error0, &next0);
463 determine_next_node(em, variant, is_l21, type1, b1, &error1, &next1);
465 b0->error = error_node->errors[error0];
466 b1->error = error_node->errors[error1];
468 // verify speculative enqueue
469 vlib_validate_buffer_enqueue_x2(vm,node,next_index,to_next,n_left_to_next,bi0,bi1,next0,next1);
472 while (n_left_from > 0 && n_left_to_next > 0)
477 u16 type0, orig_type0;
478 u16 outer_id0, inner_id0;
480 u32 old_sw_if_index0, new_sw_if_index0, len0;
481 vnet_hw_interface_t * hi0;
482 main_intf_t * main_intf0;
483 vlan_intf_t * vlan_intf0;
484 qinq_intf_t * qinq_intf0;
487 // Prefetch next iteration
488 if (n_left_from > 1) {
491 p2 = vlib_get_buffer (vm, from[1]);
492 vlib_prefetch_buffer_header (p2, STORE);
493 CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD);
503 b0 = vlib_get_buffer (vm, bi0);
505 error0 = ETHERNET_ERROR_NONE;
507 parse_header (variant,
515 old_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
517 eth_vlan_table_lookups (em,
528 identify_subint (hi0,
538 // Save RX sw_if_index for later nodes
539 vnet_buffer (b0)->sw_if_index[VLIB_RX] = error0 != ETHERNET_ERROR_NONE ? old_sw_if_index0 : new_sw_if_index0;
541 // Increment subinterface stats
542 // Note that interface-level counters have already been incremented
543 // prior to calling this function. Thus only subinterface counters
544 // are incremented here.
546 // Interface level counters include packets received on the main
547 // interface and all subinterfaces. Subinterface level counters
548 // include only those packets received on that subinterface
549 // Increment stats if the subint is valid and it is not the main intf
550 if ((new_sw_if_index0 != ~0) && (new_sw_if_index0 != old_sw_if_index0)) {
552 len0 = vlib_buffer_length_in_chain (vm, b0) + b0->current_data
553 - vnet_buffer (b0)->ethernet.start_of_ethernet_header;
555 stats_n_packets += 1;
556 stats_n_bytes += len0;
558 // Batch stat increments from the same subinterface so counters
559 // don't need to be incremented for every packet.
560 if (PREDICT_FALSE (new_sw_if_index0 != stats_sw_if_index)) {
561 stats_n_packets -= 1;
562 stats_n_bytes -= len0;
564 if (new_sw_if_index0 != ~0)
565 vlib_increment_combined_counter
566 (vnm->interface_main.combined_sw_if_counters
567 + VNET_INTERFACE_COUNTER_RX,
572 if (stats_n_packets > 0) {
573 vlib_increment_combined_counter
574 (vnm->interface_main.combined_sw_if_counters
575 + VNET_INTERFACE_COUNTER_RX,
580 stats_n_packets = stats_n_bytes = 0;
582 stats_sw_if_index = new_sw_if_index0;
586 if (variant == ETHERNET_INPUT_VARIANT_NOT_L2)
589 determine_next_node(em, variant, is_l20, type0, b0, &error0, &next0);
591 b0->error = error_node->errors[error0];
593 // verify speculative enqueue
594 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
595 to_next, n_left_to_next,
599 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
602 // Increment any remaining batched stats
603 if (stats_n_packets > 0)
605 vlib_increment_combined_counter
606 (vnm->interface_main.combined_sw_if_counters
607 + VNET_INTERFACE_COUNTER_RX,
612 node->runtime_data[0] = stats_sw_if_index;
615 return from_frame->n_vectors;
619 ethernet_input (vlib_main_t * vm,
620 vlib_node_runtime_t * node,
621 vlib_frame_t * from_frame)
622 { return ethernet_input_inline (vm, node, from_frame, ETHERNET_INPUT_VARIANT_ETHERNET); }
625 ethernet_input_type (vlib_main_t * vm,
626 vlib_node_runtime_t * node,
627 vlib_frame_t * from_frame)
628 { return ethernet_input_inline (vm, node, from_frame, ETHERNET_INPUT_VARIANT_ETHERNET_TYPE); }
631 ethernet_input_not_l2 (vlib_main_t * vm,
632 vlib_node_runtime_t * node,
633 vlib_frame_t * from_frame)
634 { return ethernet_input_inline (vm, node, from_frame, ETHERNET_INPUT_VARIANT_NOT_L2); }
637 // Return the subinterface config struct for the given sw_if_index
638 // Also return via parameter the appropriate match flags for the
639 // configured number of tags.
640 // On error (unsupported or not ethernet) return 0.
641 static subint_config_t *
642 ethernet_sw_interface_get_config (vnet_main_t * vnm,
646 ethernet_main_t * em = ðernet_main;
647 vnet_hw_interface_t * hi;
648 vnet_sw_interface_t * si;
649 main_intf_t * main_intf;
650 vlan_table_t * vlan_table;
651 qinq_table_t * qinq_table;
652 subint_config_t * subint = 0;
654 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
656 if (!hi || (hi->hw_class_index != ethernet_hw_interface_class.index)) {
658 goto done; // non-ethernet interface
661 // ensure there's an entry for the main intf (shouldn't really be necessary)
662 vec_validate (em->main_intfs, hi->hw_if_index);
663 main_intf = vec_elt_at_index (em->main_intfs, hi->hw_if_index);
665 // Locate the subint for the given ethernet config
666 si = vnet_get_sw_interface (vnm, sw_if_index);
668 if (si->sub.eth.flags.default_sub) {
669 subint = &main_intf->default_subint;
670 *flags = SUBINT_CONFIG_MATCH_0_TAG |
671 SUBINT_CONFIG_MATCH_1_TAG |
672 SUBINT_CONFIG_MATCH_2_TAG |
673 SUBINT_CONFIG_MATCH_3_TAG;
674 } else if ((si->sub.eth.flags.no_tags) ||
675 (si->sub.eth.raw_flags == 0)) {
676 // if no flags are set then this is a main interface
677 // so treat as untagged
678 subint = &main_intf->untagged_subint;
679 *flags = SUBINT_CONFIG_MATCH_0_TAG;
682 // first get the vlan table
683 if (si->sub.eth.flags.dot1ad) {
684 if (main_intf->dot1ad_vlans == 0) {
685 // Allocate a vlan table from the pool
686 pool_get(em->vlan_pool, vlan_table);
687 main_intf->dot1ad_vlans = vlan_table - em->vlan_pool;
689 // Get ptr to existing vlan table
690 vlan_table = vec_elt_at_index (em->vlan_pool, main_intf->dot1ad_vlans);
693 if (main_intf->dot1q_vlans == 0) {
694 // Allocate a vlan table from the pool
695 pool_get(em->vlan_pool, vlan_table);
696 main_intf->dot1q_vlans = vlan_table - em->vlan_pool;
698 // Get ptr to existing vlan table
699 vlan_table = vec_elt_at_index (em->vlan_pool, main_intf->dot1q_vlans);
703 if (si->sub.eth.flags.one_tag) {
704 *flags = si->sub.eth.flags.exact_match ?
705 SUBINT_CONFIG_MATCH_1_TAG :
706 (SUBINT_CONFIG_MATCH_1_TAG |
707 SUBINT_CONFIG_MATCH_2_TAG |
708 SUBINT_CONFIG_MATCH_3_TAG);
710 if (si->sub.eth.flags.outer_vlan_id_any) {
711 // not implemented yet
715 // a single vlan, a common case
716 subint = &vlan_table->vlans[si->sub.eth.outer_vlan_id].single_tag_subint;
721 *flags = si->sub.eth.flags.exact_match ?
722 SUBINT_CONFIG_MATCH_2_TAG :
723 (SUBINT_CONFIG_MATCH_2_TAG |
724 SUBINT_CONFIG_MATCH_3_TAG);
726 if (si->sub.eth.flags.outer_vlan_id_any && si->sub.eth.flags.inner_vlan_id_any) {
727 // not implemented yet
732 if (si->sub.eth.flags.inner_vlan_id_any) {
733 // a specific outer and "any" inner
734 // don't need a qinq table for this
735 subint = &vlan_table->vlans[si->sub.eth.outer_vlan_id].inner_any_subint;
736 if (si->sub.eth.flags.exact_match) {
737 *flags = SUBINT_CONFIG_MATCH_2_TAG;
739 *flags = SUBINT_CONFIG_MATCH_2_TAG |
740 SUBINT_CONFIG_MATCH_3_TAG;
743 // a specific outer + specifc innner vlan id, a common case
745 // get the qinq table
746 if (vlan_table->vlans[si->sub.eth.outer_vlan_id].qinqs == 0) {
747 // Allocate a qinq table from the pool
748 pool_get(em->qinq_pool, qinq_table);
749 vlan_table->vlans[si->sub.eth.outer_vlan_id].qinqs = qinq_table - em->qinq_pool;
751 // Get ptr to existing qinq table
752 qinq_table = vec_elt_at_index (em->qinq_pool, vlan_table->vlans[si->sub.eth.outer_vlan_id].qinqs);
754 subint = &qinq_table->vlans[si->sub.eth.inner_vlan_id].subint;
764 ethernet_sw_interface_up_down (vnet_main_t * vnm,
768 subint_config_t * subint;
771 clib_error_t * error = 0;
773 // Find the config for this subinterface
774 subint = ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags, &dummy_unsup);
777 // not implemented yet or not ethernet
781 subint->sw_if_index =
782 ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ? sw_if_index : ~0);
788 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ethernet_sw_interface_up_down);
791 // Set the L2/L3 mode for the subinterface
793 ethernet_sw_interface_set_l2_mode (vnet_main_t * vnm,
797 subint_config_t *subint;
801 vnet_sw_interface_t * sw = vnet_get_sw_interface (vnm, sw_if_index);
803 is_port = !(sw->type == VNET_SW_INTERFACE_TYPE_SUB);
805 // Find the config for this subinterface
806 subint = ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags, &dummy_unsup);
809 // unimplemented or not ethernet
813 // Double check that the config we found is for our interface (or the interface is down)
814 ASSERT ((subint->sw_if_index == sw_if_index) | (subint->sw_if_index == ~0));
817 subint->flags |= SUBINT_CONFIG_L2;
820 SUBINT_CONFIG_MATCH_0_TAG | SUBINT_CONFIG_MATCH_1_TAG
821 | SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG;
823 subint->flags &= ~SUBINT_CONFIG_L2;
826 ~(SUBINT_CONFIG_MATCH_1_TAG | SUBINT_CONFIG_MATCH_2_TAG
827 | SUBINT_CONFIG_MATCH_3_TAG);
835 * Set the L2/L3 mode for the subinterface regardless of port
838 ethernet_sw_interface_set_l2_mode_noport (vnet_main_t * vnm,
842 subint_config_t *subint;
846 /* Find the config for this subinterface */
847 subint = ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags, &dummy_unsup);
850 /* unimplemented or not ethernet */
855 * Double check that the config we found is for our interface (or the
858 ASSERT ((subint->sw_if_index == sw_if_index) | (subint->sw_if_index == ~0));
861 subint->flags |= SUBINT_CONFIG_L2;
863 subint->flags &= ~SUBINT_CONFIG_L2;
870 static clib_error_t *
871 ethernet_sw_interface_add_del (vnet_main_t * vnm,
875 clib_error_t * error = 0;
876 subint_config_t *subint;
880 // Find the config for this subinterface
881 subint = ethernet_sw_interface_get_config (vnm, sw_if_index, &match_flags, &unsupported);
884 // not implemented yet or not ethernet
886 // this is the NYI case
887 error = clib_error_return (0, "not implemented yet");
897 // Initialize the subint
898 if (subint->flags & SUBINT_CONFIG_VALID) {
899 // Error vlan already in use
900 error = clib_error_return (0, "vlan is already in use");
902 // Note that config is L3 by defaulty
903 subint->flags = SUBINT_CONFIG_VALID | match_flags;
904 subint->sw_if_index = ~0; // because interfaces are initially down
911 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ethernet_sw_interface_add_del);
913 static char * ethernet_error_strings[] = {
914 #define ethernet_error(n,c,s) s,
916 #undef ethernet_error
919 VLIB_REGISTER_NODE (ethernet_input_node) = {
920 .function = ethernet_input,
921 .name = "ethernet-input",
922 /* Takes a vector of packets. */
923 .vector_size = sizeof (u32),
925 .n_errors = ETHERNET_N_ERROR,
926 .error_strings = ethernet_error_strings,
928 .n_next_nodes = ETHERNET_INPUT_N_NEXT,
930 #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
931 foreach_ethernet_input_next
935 .format_buffer = format_ethernet_header_with_length,
936 .format_trace = format_ethernet_input_trace,
937 .unformat_buffer = unformat_ethernet_header,
940 VLIB_NODE_FUNCTION_MULTIARCH (ethernet_input_node, ethernet_input)
942 VLIB_REGISTER_NODE (ethernet_input_type_node,static) = {
943 .function = ethernet_input_type,
944 .name = "ethernet-input-type",
945 /* Takes a vector of packets. */
946 .vector_size = sizeof (u32),
948 .n_next_nodes = ETHERNET_INPUT_N_NEXT,
950 #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
951 foreach_ethernet_input_next
956 VLIB_NODE_FUNCTION_MULTIARCH (ethernet_input_type_node, ethernet_input_type)
958 VLIB_REGISTER_NODE (ethernet_input_not_l2_node,static) = {
959 .function = ethernet_input_not_l2,
960 .name = "ethernet-input-not-l2",
961 /* Takes a vector of packets. */
962 .vector_size = sizeof (u32),
964 .n_next_nodes = ETHERNET_INPUT_N_NEXT,
966 #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
967 foreach_ethernet_input_next
972 VLIB_NODE_FUNCTION_MULTIARCH (ethernet_input_not_l2_node, ethernet_input_not_l2)
974 void ethernet_set_rx_redirect (vnet_main_t * vnm,
975 vnet_hw_interface_t * hi,
978 // Insure all packets go to ethernet-input (i.e. untagged ipv4 packets
979 // don't go directly to ip4-input)
980 vnet_hw_interface_rx_redirect_to_node
981 (vnm, hi->hw_if_index, enable ? ethernet_input_node.index : ~0);
986 * Initialization and registration for the next_by_ethernet structure
989 clib_error_t * next_by_ethertype_init (next_by_ethertype_t * l3_next)
991 l3_next->input_next_by_type = sparse_vec_new
992 (/* elt bytes */ sizeof (l3_next->input_next_by_type[0]),
993 /* bits in index */ BITS (((ethernet_header_t *) 0)->type));
995 vec_validate (l3_next->sparse_index_by_input_next_index, ETHERNET_INPUT_NEXT_DROP);
996 vec_validate (l3_next->sparse_index_by_input_next_index, ETHERNET_INPUT_NEXT_PUNT);
997 l3_next->sparse_index_by_input_next_index[ETHERNET_INPUT_NEXT_DROP]
998 = SPARSE_VEC_INVALID_INDEX;
999 l3_next->sparse_index_by_input_next_index[ETHERNET_INPUT_NEXT_PUNT]
1000 = SPARSE_VEC_INVALID_INDEX;
1003 * Make sure we don't wipe out an ethernet registration by mistake
1004 * Can happen if init function ordering constraints are missing.
1008 ethernet_main_t * em = ðernet_main;
1009 ASSERT(em->next_by_ethertype_register_called == 0);
1015 // Add an ethertype -> next index mapping to the structure
1016 clib_error_t * next_by_ethertype_register (next_by_ethertype_t * l3_next,
1022 ethernet_main_t * em = ðernet_main;
1026 ethernet_main_t * em = ðernet_main;
1027 em->next_by_ethertype_register_called = 1;
1030 /* Setup ethernet type -> next index sparse vector mapping. */
1031 n = sparse_vec_validate (l3_next->input_next_by_type, ethertype);
1034 /* Rebuild next index -> sparse index inverse mapping when sparse vector
1036 vec_validate (l3_next->sparse_index_by_input_next_index, next_index);
1037 for (i = 1; i < vec_len (l3_next->input_next_by_type); i++)
1038 l3_next->sparse_index_by_input_next_index[l3_next->input_next_by_type[i]] = i;
1040 // do not allow the cached next index's to be updated if L3
1041 // redirect is enabled, as it will have overwritten them
1042 if (!em->redirect_l3) {
1043 // Cache common ethertypes directly
1044 if (ethertype == ETHERNET_TYPE_IP4) {
1045 l3_next->input_next_ip4 = next_index;
1046 } else if (ethertype == ETHERNET_TYPE_IP6) {
1047 l3_next->input_next_ip6 = next_index;
1048 } else if (ethertype == ETHERNET_TYPE_MPLS_UNICAST) {
1049 l3_next->input_next_mpls = next_index;
1056 static clib_error_t * ethernet_input_init (vlib_main_t * vm)
1058 ethernet_main_t * em = ðernet_main;
1059 __attribute__((unused)) vlan_table_t * invalid_vlan_table;
1060 __attribute__((unused)) qinq_table_t * invalid_qinq_table;
1062 ethernet_setup_node (vm, ethernet_input_node.index);
1063 ethernet_setup_node (vm, ethernet_input_type_node.index);
1064 ethernet_setup_node (vm, ethernet_input_not_l2_node.index);
1066 next_by_ethertype_init (&em->l3_next);
1068 // Initialize pools and vector for vlan parsing
1069 vec_validate (em->main_intfs, 10); // 10 main interfaces
1070 pool_alloc(em->vlan_pool, 10);
1071 pool_alloc(em->qinq_pool, 1);
1073 // The first vlan pool will always be reserved for an invalid table
1074 pool_get(em->vlan_pool, invalid_vlan_table); // first id = 0
1075 // The first qinq pool will always be reserved for an invalid table
1076 pool_get(em->qinq_pool, invalid_qinq_table); // first id = 0
1081 VLIB_INIT_FUNCTION (ethernet_input_init);
1084 ethernet_register_input_type (vlib_main_t * vm,
1085 ethernet_type_t type,
1088 ethernet_main_t * em = ðernet_main;
1089 ethernet_type_info_t * ti;
1093 clib_error_t * error = vlib_call_init_function (vm, ethernet_init);
1095 clib_error_report (error);
1098 ti = ethernet_get_type_info (em, type);
1099 ti->node_index = node_index;
1100 ti->next_index = vlib_node_add_next (vm,
1101 ethernet_input_node.index,
1103 i = vlib_node_add_next (vm,
1104 ethernet_input_type_node.index,
1106 ASSERT (i == ti->next_index);
1108 i = vlib_node_add_next (vm,
1109 ethernet_input_not_l2_node.index,
1111 ASSERT (i == ti->next_index);
1113 // Add the L3 node for this ethertype to the next nodes structure
1114 next_by_ethertype_register (&em->l3_next, type, ti->next_index);
1116 // Call the registration functions for other nodes that want a mapping
1117 l2bvi_register_input_type (vm, type, node_index);
1121 ethernet_register_l2_input (vlib_main_t * vm,
1124 ethernet_main_t * em = ðernet_main;
1127 em->l2_next = vlib_node_add_next (vm, ethernet_input_node.index, node_index);
1130 * Even if we never use these arcs, we have to align the next indices...
1132 i = vlib_node_add_next (vm, ethernet_input_type_node.index, node_index);
1134 ASSERT (i == em->l2_next);
1136 i = vlib_node_add_next (vm,
1137 ethernet_input_not_l2_node.index,
1139 ASSERT (i == em->l2_next);
1142 // Register a next node for L3 redirect, and enable L3 redirect
1144 ethernet_register_l3_redirect (vlib_main_t * vm,
1147 ethernet_main_t * em = ðernet_main;
1150 em->redirect_l3 = 1;
1151 em->redirect_l3_next = vlib_node_add_next(vm,
1152 ethernet_input_node.index,
1155 * Change the cached next nodes to the redirect node
1157 em->l3_next.input_next_ip4 = em->redirect_l3_next;
1158 em->l3_next.input_next_ip6 = em->redirect_l3_next;
1159 em->l3_next.input_next_mpls = em->redirect_l3_next;
1162 * Even if we never use these arcs, we have to align the next indices...
1164 i = vlib_node_add_next (vm, ethernet_input_type_node.index, node_index);
1166 ASSERT (i == em->redirect_l3_next);