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_NOT_L2,
80 } ethernet_input_variant_t;
83 // Parse the ethernet header to extract vlan tags and innermost ethertype
84 static_always_inline void
85 parse_header (ethernet_input_variant_t variant,
94 if (variant == ETHERNET_INPUT_VARIANT_ETHERNET
95 || variant == ETHERNET_INPUT_VARIANT_NOT_L2) {
96 ethernet_header_t * e0;
98 e0 = (void *) (b0->data + b0->current_data);
100 vnet_buffer (b0)->ethernet.start_of_ethernet_header = b0->current_data;
102 vlib_buffer_advance (b0, sizeof (e0[0]));
104 *type = clib_net_to_host_u16(e0->type);
105 } else if (variant == ETHERNET_INPUT_VARIANT_ETHERNET_TYPE) {
106 // here when prior node was LLC/SNAP processing
109 e0 = (void *) (b0->data + b0->current_data);
111 vlib_buffer_advance (b0, sizeof (e0[0]));
113 *type = clib_net_to_host_u16(e0[0]);
116 // save for distinguishing between dot1q and dot1ad later
119 // default the tags to 0 (used if there is no corresponding tag)
123 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_0_TAG;
126 // check for vlan encaps
127 if ((*type == ETHERNET_TYPE_VLAN) ||
128 (*type == ETHERNET_TYPE_DOT1AD) ||
129 (*type == ETHERNET_TYPE_VLAN_9100) ||
130 (*type == ETHERNET_TYPE_VLAN_9200))
132 ethernet_vlan_header_t * h0;
135 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_1_TAG;
137 h0 = (void *) (b0->data + b0->current_data);
139 tag = clib_net_to_host_u16 (h0->priority_cfi_and_id);
141 *outer_id = tag & 0xfff;
143 *type = clib_net_to_host_u16(h0->type);
145 vlib_buffer_advance (b0, sizeof (h0[0]));
148 if (*type == ETHERNET_TYPE_VLAN) {
149 // Double tagged packet
150 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_2_TAG;
152 h0 = (void *) (b0->data + b0->current_data);
154 tag = clib_net_to_host_u16 (h0->priority_cfi_and_id);
156 *inner_id = tag & 0xfff;
158 *type = clib_net_to_host_u16(h0->type);
160 vlib_buffer_advance (b0, sizeof (h0[0]));
163 if (*type == ETHERNET_TYPE_VLAN) {
164 // More than double tagged packet
165 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_3_TAG;
166 vlan_count = 3; // "unknown" number, aka, 3-or-more
170 ethernet_buffer_set_vlan_count(b0, vlan_count);
173 // Determine the subinterface for this packet, given the result of the
174 // vlan table lookups and vlan header parsing. Check the most specific
176 static_always_inline void
177 identify_subint (vnet_hw_interface_t * hi,
180 main_intf_t * main_intf,
181 vlan_intf_t * vlan_intf,
182 qinq_intf_t * qinq_intf,
183 u32 * new_sw_if_index,
189 matched = eth_identify_subint (hi, b0, match_flags,
190 main_intf, vlan_intf, qinq_intf,
191 new_sw_if_index, error0, is_l2);
195 // Perform L3 my-mac filter
196 // A unicast packet arriving on an L3 interface must have a dmac matching the interface mac.
197 // This is required for promiscuous mode, else we will forward packets we aren't supposed to.
199 ethernet_header_t * e0;
200 e0 = (void *) (b0->data + vnet_buffer (b0)->ethernet.start_of_ethernet_header);
202 if (!(ethernet_address_cast(e0->dst_address))) {
203 if (!eth_mac_equal((u8 *)e0, hi->hw_address)) {
204 *error0 = ETHERNET_ERROR_L3_MAC_MISMATCH;
209 // Check for down subinterface
210 *error0 = (*new_sw_if_index) != ~0 ? (*error0) : ETHERNET_ERROR_DOWN;
214 static_always_inline void
215 determine_next_node (ethernet_main_t * em,
216 ethernet_input_variant_t variant,
223 if (PREDICT_FALSE (*error0 != ETHERNET_ERROR_NONE)) {
224 // some error occurred
225 *next0 = ETHERNET_INPUT_NEXT_DROP;
227 *next0 = em->l2_next;
228 // record the L2 len and reset the buffer so the L2 header is preserved
229 vnet_buffer(b0)->l2.l2_len = b0->current_data;
230 vlib_buffer_advance(b0, - ethernet_buffer_header_size(b0));
232 // check for common IP/MPLS ethertypes
233 } else if (type0 == ETHERNET_TYPE_IP4) {
234 *next0 = em->l3_next.input_next_ip4;
235 } else if (type0 == ETHERNET_TYPE_IP6) {
236 *next0 = em->l3_next.input_next_ip6;
237 } else if (type0 == ETHERNET_TYPE_MPLS_UNICAST) {
238 *next0 = em->l3_next.input_next_mpls;
240 } else if (em->redirect_l3) {
241 // L3 Redirect is on, the cached common next nodes will be
242 // pointing to the redirect node, catch the uncommon types here
243 *next0 = em->redirect_l3_next;
245 // uncommon ethertype, check table
247 i0 = sparse_vec_index (em->l3_next.input_next_by_type, type0);
248 *next0 = vec_elt (em->l3_next.input_next_by_type, i0);
249 *error0 = i0 == SPARSE_VEC_INVALID_INDEX ? ETHERNET_ERROR_UNKNOWN_TYPE : *error0;
251 // The table is not populated with LLC values, so check that now.
252 // If variant is variant_ethernet then we came from LLC processing. Don't
253 // go back there; drop instead using by keeping the drop/bad table result.
254 if ((type0 < 0x600) && (variant == ETHERNET_INPUT_VARIANT_ETHERNET)) {
255 *next0 = ETHERNET_INPUT_NEXT_LLC;
260 static_always_inline uword
261 ethernet_input_inline (vlib_main_t * vm,
262 vlib_node_runtime_t * node,
263 vlib_frame_t * from_frame,
264 ethernet_input_variant_t variant)
266 vnet_main_t * vnm = vnet_get_main();
267 ethernet_main_t * em = ðernet_main;
268 vlib_node_runtime_t * error_node;
269 u32 n_left_from, next_index, * from, * to_next;
270 u32 stats_sw_if_index, stats_n_packets, stats_n_bytes;
271 u32 cpu_index = os_get_cpu_number();
273 if (variant != ETHERNET_INPUT_VARIANT_ETHERNET)
274 error_node = vlib_node_get_runtime (vm, ethernet_input_node.index);
278 from = vlib_frame_vector_args (from_frame);
279 n_left_from = from_frame->n_vectors;
281 if (node->flags & VLIB_NODE_FLAG_TRACE)
282 vlib_trace_frame_buffers_only (vm, node,
286 sizeof (ethernet_input_trace_t));
288 next_index = node->cached_next_index;
289 stats_sw_if_index = node->runtime_data[0];
290 stats_n_packets = stats_n_bytes = 0;
292 while (n_left_from > 0)
296 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
298 while (n_left_from >= 4 && n_left_to_next >= 2)
301 vlib_buffer_t * b0, * b1;
302 u8 next0, next1, error0, error1;
303 u16 type0, orig_type0, type1, orig_type1;
304 u16 outer_id0, inner_id0, outer_id1, inner_id1;
305 u32 match_flags0, match_flags1;
306 u32 old_sw_if_index0, new_sw_if_index0, len0, old_sw_if_index1, new_sw_if_index1, len1;
307 vnet_hw_interface_t * hi0, * hi1;
308 main_intf_t * main_intf0, * main_intf1;
309 vlan_intf_t * vlan_intf0, * vlan_intf1;
310 qinq_intf_t * qinq_intf0, * qinq_intf1;
313 /* Prefetch next iteration. */
315 vlib_buffer_t * b2, * b3;
317 b2 = vlib_get_buffer (vm, from[2]);
318 b3 = vlib_get_buffer (vm, from[3]);
320 vlib_prefetch_buffer_header (b2, STORE);
321 vlib_prefetch_buffer_header (b3, STORE);
323 CLIB_PREFETCH (b2->data, sizeof (ethernet_header_t), LOAD);
324 CLIB_PREFETCH (b3->data, sizeof (ethernet_header_t), LOAD);
336 b0 = vlib_get_buffer (vm, bi0);
337 b1 = vlib_get_buffer (vm, bi1);
339 error0 = error1 = ETHERNET_ERROR_NONE;
341 parse_header (variant,
349 parse_header (variant,
357 old_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
358 old_sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
360 eth_vlan_table_lookups (em,
371 eth_vlan_table_lookups (em,
382 identify_subint (hi0,
392 identify_subint (hi1,
402 // Save RX sw_if_index for later nodes
403 vnet_buffer (b0)->sw_if_index[VLIB_RX] = error0 != ETHERNET_ERROR_NONE ? old_sw_if_index0 : new_sw_if_index0;
404 vnet_buffer (b1)->sw_if_index[VLIB_RX] = error1 != ETHERNET_ERROR_NONE ? old_sw_if_index1 : new_sw_if_index1;
406 // Check if there is a stat to take (valid and non-main sw_if_index for pkt 0 or pkt 1)
407 if (((new_sw_if_index0 != ~0) && (new_sw_if_index0 != old_sw_if_index0)) ||
408 ((new_sw_if_index1 != ~0) && (new_sw_if_index1 != old_sw_if_index1))) {
410 len0 = vlib_buffer_length_in_chain (vm, b0) + b0->current_data
411 - vnet_buffer (b0)->ethernet.start_of_ethernet_header;
412 len1 = vlib_buffer_length_in_chain (vm, b1) + b1->current_data
413 - vnet_buffer (b1)->ethernet.start_of_ethernet_header;
415 stats_n_packets += 2;
416 stats_n_bytes += len0 + len1;
418 if (PREDICT_FALSE (! (new_sw_if_index0 == stats_sw_if_index && new_sw_if_index1 == stats_sw_if_index)))
420 stats_n_packets -= 2;
421 stats_n_bytes -= len0 + len1;
423 if (new_sw_if_index0 != old_sw_if_index0 && new_sw_if_index0 != ~0)
424 vlib_increment_combined_counter
425 (vnm->interface_main.combined_sw_if_counters
426 + VNET_INTERFACE_COUNTER_RX,
431 if (new_sw_if_index1 != old_sw_if_index1 && new_sw_if_index1 != ~0)
432 vlib_increment_combined_counter
433 (vnm->interface_main.combined_sw_if_counters
434 + VNET_INTERFACE_COUNTER_RX,
440 if (new_sw_if_index0 == new_sw_if_index1)
442 if (stats_n_packets > 0)
444 vlib_increment_combined_counter
445 (vnm->interface_main.combined_sw_if_counters
446 + VNET_INTERFACE_COUNTER_RX,
451 stats_n_packets = stats_n_bytes = 0;
453 stats_sw_if_index = new_sw_if_index0;
458 if (variant == ETHERNET_INPUT_VARIANT_NOT_L2)
461 determine_next_node(em, variant, is_l20, type0, b0, &error0, &next0);
462 determine_next_node(em, variant, is_l21, type1, b1, &error1, &next1);
464 b0->error = error_node->errors[error0];
465 b1->error = error_node->errors[error1];
467 // verify speculative enqueue
468 vlib_validate_buffer_enqueue_x2(vm,node,next_index,to_next,n_left_to_next,bi0,bi1,next0,next1);
471 while (n_left_from > 0 && n_left_to_next > 0)
476 u16 type0, orig_type0;
477 u16 outer_id0, inner_id0;
479 u32 old_sw_if_index0, new_sw_if_index0, len0;
480 vnet_hw_interface_t * hi0;
481 main_intf_t * main_intf0;
482 vlan_intf_t * vlan_intf0;
483 qinq_intf_t * qinq_intf0;
486 // Prefetch next iteration
487 if (n_left_from > 1) {
490 p2 = vlib_get_buffer (vm, from[1]);
491 vlib_prefetch_buffer_header (p2, STORE);
492 CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD);
502 b0 = vlib_get_buffer (vm, bi0);
504 error0 = ETHERNET_ERROR_NONE;
506 parse_header (variant,
514 old_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
516 eth_vlan_table_lookups (em,
527 identify_subint (hi0,
537 // Save RX sw_if_index for later nodes
538 vnet_buffer (b0)->sw_if_index[VLIB_RX] = error0 != ETHERNET_ERROR_NONE ? old_sw_if_index0 : new_sw_if_index0;
540 // Increment subinterface stats
541 // Note that interface-level counters have already been incremented
542 // prior to calling this function. Thus only subinterface counters
543 // are incremented here.
545 // Interface level counters include packets received on the main
546 // interface and all subinterfaces. Subinterface level counters
547 // include only those packets received on that subinterface
548 // Increment stats if the subint is valid and it is not the main intf
549 if ((new_sw_if_index0 != ~0) && (new_sw_if_index0 != old_sw_if_index0)) {
551 len0 = vlib_buffer_length_in_chain (vm, b0) + b0->current_data
552 - vnet_buffer (b0)->ethernet.start_of_ethernet_header;
554 stats_n_packets += 1;
555 stats_n_bytes += len0;
557 // Batch stat increments from the same subinterface so counters
558 // don't need to be incremented for every packet.
559 if (PREDICT_FALSE (new_sw_if_index0 != stats_sw_if_index)) {
560 stats_n_packets -= 1;
561 stats_n_bytes -= len0;
563 if (new_sw_if_index0 != ~0)
564 vlib_increment_combined_counter
565 (vnm->interface_main.combined_sw_if_counters
566 + VNET_INTERFACE_COUNTER_RX,
571 if (stats_n_packets > 0) {
572 vlib_increment_combined_counter
573 (vnm->interface_main.combined_sw_if_counters
574 + VNET_INTERFACE_COUNTER_RX,
579 stats_n_packets = stats_n_bytes = 0;
581 stats_sw_if_index = new_sw_if_index0;
585 if (variant == ETHERNET_INPUT_VARIANT_NOT_L2)
588 determine_next_node(em, variant, is_l20, type0, b0, &error0, &next0);
590 b0->error = error_node->errors[error0];
592 // verify speculative enqueue
593 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
594 to_next, n_left_to_next,
598 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
601 // Increment any remaining batched stats
602 if (stats_n_packets > 0)
604 vlib_increment_combined_counter
605 (vnm->interface_main.combined_sw_if_counters
606 + VNET_INTERFACE_COUNTER_RX,
611 node->runtime_data[0] = stats_sw_if_index;
614 return from_frame->n_vectors;
618 ethernet_input (vlib_main_t * vm,
619 vlib_node_runtime_t * node,
620 vlib_frame_t * from_frame)
621 { return ethernet_input_inline (vm, node, from_frame, ETHERNET_INPUT_VARIANT_ETHERNET); }
624 ethernet_input_type (vlib_main_t * vm,
625 vlib_node_runtime_t * node,
626 vlib_frame_t * from_frame)
627 { return ethernet_input_inline (vm, node, from_frame, ETHERNET_INPUT_VARIANT_ETHERNET_TYPE); }
630 ethernet_input_not_l2 (vlib_main_t * vm,
631 vlib_node_runtime_t * node,
632 vlib_frame_t * from_frame)
633 { return ethernet_input_inline (vm, node, from_frame, ETHERNET_INPUT_VARIANT_NOT_L2); }
636 // Return the subinterface config struct for the given sw_if_index
637 // Also return via parameter the appropriate match flags for the
638 // configured number of tags.
639 // On error (unsupported or not ethernet) return 0.
640 static subint_config_t *
641 ethernet_sw_interface_get_config (vnet_main_t * vnm,
645 ethernet_main_t * em = ðernet_main;
646 vnet_hw_interface_t * hi;
647 vnet_sw_interface_t * si;
648 main_intf_t * main_intf;
649 vlan_table_t * vlan_table;
650 qinq_table_t * qinq_table;
651 subint_config_t * subint = 0;
653 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
655 if (!hi || (hi->hw_class_index != ethernet_hw_interface_class.index)) {
657 goto done; // non-ethernet interface
660 // ensure there's an entry for the main intf (shouldn't really be necessary)
661 vec_validate (em->main_intfs, hi->hw_if_index);
662 main_intf = vec_elt_at_index (em->main_intfs, hi->hw_if_index);
664 // Locate the subint for the given ethernet config
665 si = vnet_get_sw_interface (vnm, sw_if_index);
667 if (si->sub.eth.flags.default_sub) {
668 subint = &main_intf->default_subint;
669 *flags = SUBINT_CONFIG_MATCH_0_TAG |
670 SUBINT_CONFIG_MATCH_1_TAG |
671 SUBINT_CONFIG_MATCH_2_TAG |
672 SUBINT_CONFIG_MATCH_3_TAG;
673 } else if ((si->sub.eth.flags.no_tags) ||
674 (si->sub.eth.raw_flags == 0)) {
675 // if no flags are set then this is a main interface
676 // so treat as untagged
677 subint = &main_intf->untagged_subint;
678 *flags = SUBINT_CONFIG_MATCH_0_TAG;
681 // first get the vlan table
682 if (si->sub.eth.flags.dot1ad) {
683 if (main_intf->dot1ad_vlans == 0) {
684 // Allocate a vlan table from the pool
685 pool_get(em->vlan_pool, vlan_table);
686 main_intf->dot1ad_vlans = vlan_table - em->vlan_pool;
688 // Get ptr to existing vlan table
689 vlan_table = vec_elt_at_index (em->vlan_pool, main_intf->dot1ad_vlans);
692 if (main_intf->dot1q_vlans == 0) {
693 // Allocate a vlan table from the pool
694 pool_get(em->vlan_pool, vlan_table);
695 main_intf->dot1q_vlans = vlan_table - em->vlan_pool;
697 // Get ptr to existing vlan table
698 vlan_table = vec_elt_at_index (em->vlan_pool, main_intf->dot1q_vlans);
702 if (si->sub.eth.flags.one_tag) {
703 *flags = si->sub.eth.flags.exact_match ?
704 SUBINT_CONFIG_MATCH_1_TAG :
705 (SUBINT_CONFIG_MATCH_1_TAG |
706 SUBINT_CONFIG_MATCH_2_TAG |
707 SUBINT_CONFIG_MATCH_3_TAG);
709 if (si->sub.eth.flags.outer_vlan_id_any) {
710 // not implemented yet
714 // a single vlan, a common case
715 subint = &vlan_table->vlans[si->sub.eth.outer_vlan_id].single_tag_subint;
720 *flags = si->sub.eth.flags.exact_match ?
721 SUBINT_CONFIG_MATCH_2_TAG :
722 (SUBINT_CONFIG_MATCH_2_TAG |
723 SUBINT_CONFIG_MATCH_3_TAG);
725 if (si->sub.eth.flags.outer_vlan_id_any && si->sub.eth.flags.inner_vlan_id_any) {
726 // not implemented yet
731 if (si->sub.eth.flags.inner_vlan_id_any) {
732 // a specific outer and "any" inner
733 // don't need a qinq table for this
734 subint = &vlan_table->vlans[si->sub.eth.outer_vlan_id].inner_any_subint;
735 if (si->sub.eth.flags.exact_match) {
736 *flags = SUBINT_CONFIG_MATCH_2_TAG;
738 *flags = SUBINT_CONFIG_MATCH_2_TAG |
739 SUBINT_CONFIG_MATCH_3_TAG;
742 // a specific outer + specifc innner vlan id, a common case
744 // get the qinq table
745 if (vlan_table->vlans[si->sub.eth.outer_vlan_id].qinqs == 0) {
746 // Allocate a qinq table from the pool
747 pool_get(em->qinq_pool, qinq_table);
748 vlan_table->vlans[si->sub.eth.outer_vlan_id].qinqs = qinq_table - em->qinq_pool;
750 // Get ptr to existing qinq table
751 qinq_table = vec_elt_at_index (em->qinq_pool, vlan_table->vlans[si->sub.eth.outer_vlan_id].qinqs);
753 subint = &qinq_table->vlans[si->sub.eth.inner_vlan_id].subint;
763 ethernet_sw_interface_up_down (vnet_main_t * vnm,
767 subint_config_t * subint;
770 clib_error_t * error = 0;
772 // Find the config for this subinterface
773 subint = ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags, &dummy_unsup);
776 // not implemented yet or not ethernet
780 subint->sw_if_index =
781 ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ? sw_if_index : ~0);
787 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ethernet_sw_interface_up_down);
790 // Set the L2/L3 mode for the subinterface
792 ethernet_sw_interface_set_l2_mode (vnet_main_t * vnm,
796 subint_config_t *subint;
800 vnet_sw_interface_t * sw = vnet_get_sw_interface (vnm, sw_if_index);
802 is_port = !(sw->type == VNET_SW_INTERFACE_TYPE_SUB);
804 // Find the config for this subinterface
805 subint = ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags, &dummy_unsup);
808 // unimplemented or not ethernet
812 // Double check that the config we found is for our interface (or the interface is down)
813 ASSERT ((subint->sw_if_index == sw_if_index) | (subint->sw_if_index == ~0));
816 subint->flags |= SUBINT_CONFIG_L2;
819 SUBINT_CONFIG_MATCH_0_TAG | SUBINT_CONFIG_MATCH_1_TAG
820 | SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG;
822 subint->flags &= ~SUBINT_CONFIG_L2;
825 ~(SUBINT_CONFIG_MATCH_1_TAG | SUBINT_CONFIG_MATCH_2_TAG
826 | SUBINT_CONFIG_MATCH_3_TAG);
834 * Set the L2/L3 mode for the subinterface regardless of port
837 ethernet_sw_interface_set_l2_mode_noport (vnet_main_t * vnm,
841 subint_config_t *subint;
845 /* Find the config for this subinterface */
846 subint = ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags, &dummy_unsup);
849 /* unimplemented or not ethernet */
854 * Double check that the config we found is for our interface (or the
857 ASSERT ((subint->sw_if_index == sw_if_index) | (subint->sw_if_index == ~0));
860 subint->flags |= SUBINT_CONFIG_L2;
862 subint->flags &= ~SUBINT_CONFIG_L2;
869 static clib_error_t *
870 ethernet_sw_interface_add_del (vnet_main_t * vnm,
874 clib_error_t * error = 0;
875 subint_config_t *subint;
879 // Find the config for this subinterface
880 subint = ethernet_sw_interface_get_config (vnm, sw_if_index, &match_flags, &unsupported);
883 // not implemented yet or not ethernet
885 // this is the NYI case
886 error = clib_error_return (0, "not implemented yet");
896 // Initialize the subint
897 if (subint->flags & SUBINT_CONFIG_VALID) {
898 // Error vlan already in use
899 error = clib_error_return (0, "vlan is already in use");
901 // Note that config is L3 by defaulty
902 subint->flags = SUBINT_CONFIG_VALID | match_flags;
903 subint->sw_if_index = ~0; // because interfaces are initially down
910 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ethernet_sw_interface_add_del);
912 static char * ethernet_error_strings[] = {
913 #define ethernet_error(n,c,s) s,
915 #undef ethernet_error
918 VLIB_REGISTER_NODE (ethernet_input_node) = {
919 .function = ethernet_input,
920 .name = "ethernet-input",
921 /* Takes a vector of packets. */
922 .vector_size = sizeof (u32),
924 .n_errors = ETHERNET_N_ERROR,
925 .error_strings = ethernet_error_strings,
927 .n_next_nodes = ETHERNET_INPUT_N_NEXT,
929 #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
930 foreach_ethernet_input_next
934 .format_buffer = format_ethernet_header_with_length,
935 .format_trace = format_ethernet_input_trace,
936 .unformat_buffer = unformat_ethernet_header,
939 VLIB_NODE_FUNCTION_MULTIARCH (ethernet_input_node, ethernet_input)
941 VLIB_REGISTER_NODE (ethernet_input_type_node,static) = {
942 .function = ethernet_input_type,
943 .name = "ethernet-input-type",
944 /* Takes a vector of packets. */
945 .vector_size = sizeof (u32),
947 .n_next_nodes = ETHERNET_INPUT_N_NEXT,
949 #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
950 foreach_ethernet_input_next
955 VLIB_NODE_FUNCTION_MULTIARCH (ethernet_input_type_node, ethernet_input_type)
957 VLIB_REGISTER_NODE (ethernet_input_not_l2_node,static) = {
958 .function = ethernet_input_not_l2,
959 .name = "ethernet-input-not-l2",
960 /* Takes a vector of packets. */
961 .vector_size = sizeof (u32),
963 .n_next_nodes = ETHERNET_INPUT_N_NEXT,
965 #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
966 foreach_ethernet_input_next
971 VLIB_NODE_FUNCTION_MULTIARCH (ethernet_input_not_l2_node, ethernet_input_not_l2)
973 void ethernet_set_rx_redirect (vnet_main_t * vnm,
974 vnet_hw_interface_t * hi,
977 // Insure all packets go to ethernet-input (i.e. untagged ipv4 packets
978 // don't go directly to ip4-input)
979 vnet_hw_interface_rx_redirect_to_node
980 (vnm, hi->hw_if_index, enable ? ethernet_input_node.index : ~0);
985 * Initialization and registration for the next_by_ethernet structure
988 clib_error_t * next_by_ethertype_init (next_by_ethertype_t * l3_next)
990 l3_next->input_next_by_type = sparse_vec_new
991 (/* elt bytes */ sizeof (l3_next->input_next_by_type[0]),
992 /* bits in index */ BITS (((ethernet_header_t *) 0)->type));
994 vec_validate (l3_next->sparse_index_by_input_next_index, ETHERNET_INPUT_NEXT_DROP);
995 vec_validate (l3_next->sparse_index_by_input_next_index, ETHERNET_INPUT_NEXT_PUNT);
996 l3_next->sparse_index_by_input_next_index[ETHERNET_INPUT_NEXT_DROP]
997 = SPARSE_VEC_INVALID_INDEX;
998 l3_next->sparse_index_by_input_next_index[ETHERNET_INPUT_NEXT_PUNT]
999 = SPARSE_VEC_INVALID_INDEX;
1002 * Make sure we don't wipe out an ethernet registration by mistake
1003 * Can happen if init function ordering constraints are missing.
1007 ethernet_main_t * em = ðernet_main;
1008 ASSERT(em->next_by_ethertype_register_called == 0);
1014 // Add an ethertype -> next index mapping to the structure
1015 clib_error_t * next_by_ethertype_register (next_by_ethertype_t * l3_next,
1021 ethernet_main_t * em = ðernet_main;
1025 ethernet_main_t * em = ðernet_main;
1026 em->next_by_ethertype_register_called = 1;
1029 /* Setup ethernet type -> next index sparse vector mapping. */
1030 n = sparse_vec_validate (l3_next->input_next_by_type, ethertype);
1033 /* Rebuild next index -> sparse index inverse mapping when sparse vector
1035 vec_validate (l3_next->sparse_index_by_input_next_index, next_index);
1036 for (i = 1; i < vec_len (l3_next->input_next_by_type); i++)
1037 l3_next->sparse_index_by_input_next_index[l3_next->input_next_by_type[i]] = i;
1039 // do not allow the cached next index's to be updated if L3
1040 // redirect is enabled, as it will have overwritten them
1041 if (!em->redirect_l3) {
1042 // Cache common ethertypes directly
1043 if (ethertype == ETHERNET_TYPE_IP4) {
1044 l3_next->input_next_ip4 = next_index;
1045 } else if (ethertype == ETHERNET_TYPE_IP6) {
1046 l3_next->input_next_ip6 = next_index;
1047 } else if (ethertype == ETHERNET_TYPE_MPLS_UNICAST) {
1048 l3_next->input_next_mpls = next_index;
1055 static clib_error_t * ethernet_input_init (vlib_main_t * vm)
1057 ethernet_main_t * em = ðernet_main;
1058 __attribute__((unused)) vlan_table_t * invalid_vlan_table;
1059 __attribute__((unused)) qinq_table_t * invalid_qinq_table;
1061 ethernet_setup_node (vm, ethernet_input_node.index);
1062 ethernet_setup_node (vm, ethernet_input_type_node.index);
1063 ethernet_setup_node (vm, ethernet_input_not_l2_node.index);
1065 next_by_ethertype_init (&em->l3_next);
1067 // Initialize pools and vector for vlan parsing
1068 vec_validate (em->main_intfs, 10); // 10 main interfaces
1069 pool_alloc(em->vlan_pool, 10);
1070 pool_alloc(em->qinq_pool, 1);
1072 // The first vlan pool will always be reserved for an invalid table
1073 pool_get(em->vlan_pool, invalid_vlan_table); // first id = 0
1074 // The first qinq pool will always be reserved for an invalid table
1075 pool_get(em->qinq_pool, invalid_qinq_table); // first id = 0
1080 VLIB_INIT_FUNCTION (ethernet_input_init);
1083 ethernet_register_input_type (vlib_main_t * vm,
1084 ethernet_type_t type,
1087 ethernet_main_t * em = ðernet_main;
1088 ethernet_type_info_t * ti;
1092 clib_error_t * error = vlib_call_init_function (vm, ethernet_init);
1094 clib_error_report (error);
1097 ti = ethernet_get_type_info (em, type);
1098 ti->node_index = node_index;
1099 ti->next_index = vlib_node_add_next (vm,
1100 ethernet_input_node.index,
1102 i = vlib_node_add_next (vm,
1103 ethernet_input_type_node.index,
1105 ASSERT (i == ti->next_index);
1107 i = vlib_node_add_next (vm,
1108 ethernet_input_not_l2_node.index,
1110 ASSERT (i == ti->next_index);
1112 // Add the L3 node for this ethertype to the next nodes structure
1113 next_by_ethertype_register (&em->l3_next, type, ti->next_index);
1115 // Call the registration functions for other nodes that want a mapping
1116 l2bvi_register_input_type (vm, type, node_index);
1120 ethernet_register_l2_input (vlib_main_t * vm,
1123 ethernet_main_t * em = ðernet_main;
1126 em->l2_next = vlib_node_add_next (vm, ethernet_input_node.index, node_index);
1129 * Even if we never use these arcs, we have to align the next indices...
1131 i = vlib_node_add_next (vm, ethernet_input_type_node.index, node_index);
1133 ASSERT (i == em->l2_next);
1135 i = vlib_node_add_next (vm,
1136 ethernet_input_not_l2_node.index,
1138 ASSERT (i == em->l2_next);
1141 // Register a next node for L3 redirect, and enable L3 redirect
1143 ethernet_register_l3_redirect (vlib_main_t * vm,
1146 ethernet_main_t * em = ðernet_main;
1149 em->redirect_l3 = 1;
1150 em->redirect_l3_next = vlib_node_add_next(vm,
1151 ethernet_input_node.index,
1154 * Change the cached next nodes to the redirect node
1156 em->l3_next.input_next_ip4 = em->redirect_l3_next;
1157 em->l3_next.input_next_ip6 = em->redirect_l3_next;
1158 em->l3_next.input_next_mpls = em->redirect_l3_next;
1161 * Even if we never use these arcs, we have to align the next indices...
1163 i = vlib_node_add_next (vm, ethernet_input_type_node.index, node_index);
1165 ASSERT (i == em->redirect_l3_next);