2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 * ethernet_node.c: ethernet packet processing
18 * Copyright (c) 2008 Eliot Dresselhaus
20 * Permission is hereby granted, free of charge, to any person obtaining
21 * a copy of this software and associated documentation files (the
22 * "Software"), to deal in the Software without restriction, including
23 * without limitation the rights to use, copy, modify, merge, publish,
24 * distribute, sublicense, and/or sell copies of the Software, and to
25 * permit persons to whom the Software is furnished to do so, subject to
26 * the following conditions:
28 * The above copyright notice and this permission notice shall be
29 * included in all copies or substantial portions of the Software.
31 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
40 #include <vlib/vlib.h>
41 #include <vnet/pg/pg.h>
42 #include <vnet/ethernet/ethernet.h>
43 #include <vppinfra/sparse_vec.h>
44 #include <vnet/l2/l2_bvi.h>
47 #define foreach_ethernet_input_next \
48 _ (PUNT, "error-punt") \
49 _ (DROP, "error-drop") \
54 #define _(s,n) ETHERNET_INPUT_NEXT_##s,
55 foreach_ethernet_input_next
57 ETHERNET_INPUT_N_NEXT,
58 } ethernet_input_next_t;
63 } ethernet_input_trace_t;
66 format_ethernet_input_trace (u8 * s, va_list * va)
68 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
69 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
70 ethernet_input_trace_t *t = va_arg (*va, ethernet_input_trace_t *);
72 s = format (s, "%U", format_ethernet_header, t->packet_data);
77 vlib_node_registration_t ethernet_input_node;
81 ETHERNET_INPUT_VARIANT_ETHERNET,
82 ETHERNET_INPUT_VARIANT_ETHERNET_TYPE,
83 ETHERNET_INPUT_VARIANT_NOT_L2,
84 } ethernet_input_variant_t;
87 // Parse the ethernet header to extract vlan tags and innermost ethertype
88 static_always_inline void
89 parse_header (ethernet_input_variant_t variant,
93 u16 * outer_id, u16 * inner_id, u32 * match_flags)
97 if (variant == ETHERNET_INPUT_VARIANT_ETHERNET
98 || variant == ETHERNET_INPUT_VARIANT_NOT_L2)
100 ethernet_header_t *e0;
102 e0 = (void *) (b0->data + b0->current_data);
104 vnet_buffer (b0)->ethernet.start_of_ethernet_header = b0->current_data;
106 vlib_buffer_advance (b0, sizeof (e0[0]));
108 *type = clib_net_to_host_u16 (e0->type);
110 else if (variant == ETHERNET_INPUT_VARIANT_ETHERNET_TYPE)
112 // here when prior node was LLC/SNAP processing
115 e0 = (void *) (b0->data + b0->current_data);
117 vlib_buffer_advance (b0, sizeof (e0[0]));
119 *type = clib_net_to_host_u16 (e0[0]);
122 // save for distinguishing between dot1q and dot1ad later
125 // default the tags to 0 (used if there is no corresponding tag)
129 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_0_TAG;
132 // check for vlan encaps
133 if ((*type == ETHERNET_TYPE_VLAN) ||
134 (*type == ETHERNET_TYPE_DOT1AD) ||
135 (*type == ETHERNET_TYPE_VLAN_9100) ||
136 (*type == ETHERNET_TYPE_VLAN_9200))
138 ethernet_vlan_header_t *h0;
141 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_1_TAG;
143 h0 = (void *) (b0->data + b0->current_data);
145 tag = clib_net_to_host_u16 (h0->priority_cfi_and_id);
147 *outer_id = tag & 0xfff;
149 *type = clib_net_to_host_u16 (h0->type);
151 vlib_buffer_advance (b0, sizeof (h0[0]));
154 if (*type == ETHERNET_TYPE_VLAN)
156 // Double tagged packet
157 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_2_TAG;
159 h0 = (void *) (b0->data + b0->current_data);
161 tag = clib_net_to_host_u16 (h0->priority_cfi_and_id);
163 *inner_id = tag & 0xfff;
165 *type = clib_net_to_host_u16 (h0->type);
167 vlib_buffer_advance (b0, sizeof (h0[0]));
170 if (*type == ETHERNET_TYPE_VLAN)
172 // More than double tagged packet
173 *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_3_TAG;
174 vlan_count = 3; // "unknown" number, aka, 3-or-more
178 ethernet_buffer_set_vlan_count (b0, vlan_count);
181 // Determine the subinterface for this packet, given the result of the
182 // vlan table lookups and vlan header parsing. Check the most specific
184 static_always_inline void
185 identify_subint (vnet_hw_interface_t * hi,
188 main_intf_t * main_intf,
189 vlan_intf_t * vlan_intf,
190 qinq_intf_t * qinq_intf,
191 u32 * new_sw_if_index, u8 * error0, u32 * is_l2)
195 matched = eth_identify_subint (hi, b0, match_flags,
196 main_intf, vlan_intf, qinq_intf,
197 new_sw_if_index, error0, is_l2);
202 // Perform L3 my-mac filter
203 // A unicast packet arriving on an L3 interface must have a dmac matching the interface mac.
204 // This is required for promiscuous mode, else we will forward packets we aren't supposed to.
207 ethernet_header_t *e0;
210 vnet_buffer (b0)->ethernet.start_of_ethernet_header);
212 if (!(ethernet_address_cast (e0->dst_address)))
214 if (!eth_mac_equal ((u8 *) e0, hi->hw_address))
216 *error0 = ETHERNET_ERROR_L3_MAC_MISMATCH;
221 // Check for down subinterface
222 *error0 = (*new_sw_if_index) != ~0 ? (*error0) : ETHERNET_ERROR_DOWN;
226 static_always_inline void
227 determine_next_node (ethernet_main_t * em,
228 ethernet_input_variant_t variant,
230 u32 type0, vlib_buffer_t * b0, u8 * error0, u8 * next0)
232 if (PREDICT_FALSE (*error0 != ETHERNET_ERROR_NONE))
234 // some error occurred
235 *next0 = ETHERNET_INPUT_NEXT_DROP;
239 *next0 = em->l2_next;
240 // record the L2 len and reset the buffer so the L2 header is preserved
241 vnet_buffer (b0)->l2.l2_len = b0->current_data;
242 vlib_buffer_advance (b0, -ethernet_buffer_header_size (b0));
244 // check for common IP/MPLS ethertypes
246 else if (type0 == ETHERNET_TYPE_IP4)
248 *next0 = em->l3_next.input_next_ip4;
250 else if (type0 == ETHERNET_TYPE_IP6)
252 *next0 = em->l3_next.input_next_ip6;
254 else if (type0 == ETHERNET_TYPE_MPLS_UNICAST)
256 *next0 = em->l3_next.input_next_mpls;
259 else if (em->redirect_l3)
261 // L3 Redirect is on, the cached common next nodes will be
262 // pointing to the redirect node, catch the uncommon types here
263 *next0 = em->redirect_l3_next;
267 // uncommon ethertype, check table
269 i0 = sparse_vec_index (em->l3_next.input_next_by_type, type0);
270 *next0 = vec_elt (em->l3_next.input_next_by_type, i0);
273 SPARSE_VEC_INVALID_INDEX ? ETHERNET_ERROR_UNKNOWN_TYPE : *error0;
275 // The table is not populated with LLC values, so check that now.
276 // If variant is variant_ethernet then we came from LLC processing. Don't
277 // go back there; drop instead using by keeping the drop/bad table result.
278 if ((type0 < 0x600) && (variant == ETHERNET_INPUT_VARIANT_ETHERNET))
280 *next0 = ETHERNET_INPUT_NEXT_LLC;
285 static_always_inline uword
286 ethernet_input_inline (vlib_main_t * vm,
287 vlib_node_runtime_t * node,
288 vlib_frame_t * from_frame,
289 ethernet_input_variant_t variant)
291 vnet_main_t *vnm = vnet_get_main ();
292 ethernet_main_t *em = ðernet_main;
293 vlib_node_runtime_t *error_node;
294 u32 n_left_from, next_index, *from, *to_next;
295 u32 stats_sw_if_index, stats_n_packets, stats_n_bytes;
296 u32 cpu_index = os_get_cpu_number ();
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;
339 /* Prefetch next iteration. */
341 vlib_buffer_t *b2, *b3;
343 b2 = vlib_get_buffer (vm, from[2]);
344 b3 = vlib_get_buffer (vm, from[3]);
346 vlib_prefetch_buffer_header (b2, STORE);
347 vlib_prefetch_buffer_header (b3, STORE);
349 CLIB_PREFETCH (b2->data, sizeof (ethernet_header_t), LOAD);
350 CLIB_PREFETCH (b3->data, sizeof (ethernet_header_t), LOAD);
362 b0 = vlib_get_buffer (vm, bi0);
363 b1 = vlib_get_buffer (vm, bi1);
365 error0 = error1 = ETHERNET_ERROR_NONE;
367 parse_header (variant,
370 &orig_type0, &outer_id0, &inner_id0, &match_flags0);
372 parse_header (variant,
375 &orig_type1, &outer_id1, &inner_id1, &match_flags1);
377 old_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
378 old_sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
380 eth_vlan_table_lookups (em,
387 &main_intf0, &vlan_intf0, &qinq_intf0);
389 eth_vlan_table_lookups (em,
396 &main_intf1, &vlan_intf1, &qinq_intf1);
398 identify_subint (hi0,
403 qinq_intf0, &new_sw_if_index0, &error0, &is_l20);
405 identify_subint (hi1,
410 qinq_intf1, &new_sw_if_index1, &error1, &is_l21);
412 // Save RX sw_if_index for later nodes
413 vnet_buffer (b0)->sw_if_index[VLIB_RX] =
415 ETHERNET_ERROR_NONE ? old_sw_if_index0 : new_sw_if_index0;
416 vnet_buffer (b1)->sw_if_index[VLIB_RX] =
418 ETHERNET_ERROR_NONE ? old_sw_if_index1 : new_sw_if_index1;
420 // Check if there is a stat to take (valid and non-main sw_if_index for pkt 0 or pkt 1)
421 if (((new_sw_if_index0 != ~0)
422 && (new_sw_if_index0 != old_sw_if_index0))
423 || ((new_sw_if_index1 != ~0)
424 && (new_sw_if_index1 != old_sw_if_index1)))
427 len0 = vlib_buffer_length_in_chain (vm, b0) + b0->current_data
428 - vnet_buffer (b0)->ethernet.start_of_ethernet_header;
429 len1 = vlib_buffer_length_in_chain (vm, b1) + b1->current_data
430 - vnet_buffer (b1)->ethernet.start_of_ethernet_header;
432 stats_n_packets += 2;
433 stats_n_bytes += len0 + len1;
436 (!(new_sw_if_index0 == stats_sw_if_index
437 && new_sw_if_index1 == stats_sw_if_index)))
439 stats_n_packets -= 2;
440 stats_n_bytes -= len0 + len1;
442 if (new_sw_if_index0 != old_sw_if_index0
443 && new_sw_if_index0 != ~0)
444 vlib_increment_combined_counter (vnm->
445 interface_main.combined_sw_if_counters
447 VNET_INTERFACE_COUNTER_RX,
451 if (new_sw_if_index1 != old_sw_if_index1
452 && new_sw_if_index1 != ~0)
453 vlib_increment_combined_counter (vnm->
454 interface_main.combined_sw_if_counters
456 VNET_INTERFACE_COUNTER_RX,
461 if (new_sw_if_index0 == new_sw_if_index1)
463 if (stats_n_packets > 0)
465 vlib_increment_combined_counter
466 (vnm->interface_main.combined_sw_if_counters
467 + VNET_INTERFACE_COUNTER_RX,
470 stats_n_packets, stats_n_bytes);
471 stats_n_packets = stats_n_bytes = 0;
473 stats_sw_if_index = new_sw_if_index0;
478 if (variant == ETHERNET_INPUT_VARIANT_NOT_L2)
481 determine_next_node (em, variant, is_l20, type0, b0, &error0,
483 determine_next_node (em, variant, is_l21, type1, b1, &error1,
486 b0->error = error_node->errors[error0];
487 b1->error = error_node->errors[error1];
489 // verify speculative enqueue
490 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
491 n_left_to_next, bi0, bi1, next0,
495 while (n_left_from > 0 && n_left_to_next > 0)
500 u16 type0, orig_type0;
501 u16 outer_id0, inner_id0;
503 u32 old_sw_if_index0, new_sw_if_index0, len0;
504 vnet_hw_interface_t *hi0;
505 main_intf_t *main_intf0;
506 vlan_intf_t *vlan_intf0;
507 qinq_intf_t *qinq_intf0;
510 // Prefetch next iteration
515 p2 = vlib_get_buffer (vm, from[1]);
516 vlib_prefetch_buffer_header (p2, STORE);
517 CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD);
527 b0 = vlib_get_buffer (vm, bi0);
529 error0 = ETHERNET_ERROR_NONE;
531 parse_header (variant,
534 &orig_type0, &outer_id0, &inner_id0, &match_flags0);
536 old_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
538 eth_vlan_table_lookups (em,
545 &main_intf0, &vlan_intf0, &qinq_intf0);
547 identify_subint (hi0,
552 qinq_intf0, &new_sw_if_index0, &error0, &is_l20);
554 // Save RX sw_if_index for later nodes
555 vnet_buffer (b0)->sw_if_index[VLIB_RX] =
557 ETHERNET_ERROR_NONE ? old_sw_if_index0 : new_sw_if_index0;
559 // Increment subinterface stats
560 // Note that interface-level counters have already been incremented
561 // prior to calling this function. Thus only subinterface counters
562 // are incremented here.
564 // Interface level counters include packets received on the main
565 // interface and all subinterfaces. Subinterface level counters
566 // include only those packets received on that subinterface
567 // Increment stats if the subint is valid and it is not the main intf
568 if ((new_sw_if_index0 != ~0)
569 && (new_sw_if_index0 != old_sw_if_index0))
572 len0 = vlib_buffer_length_in_chain (vm, b0) + b0->current_data
573 - vnet_buffer (b0)->ethernet.start_of_ethernet_header;
575 stats_n_packets += 1;
576 stats_n_bytes += len0;
578 // Batch stat increments from the same subinterface so counters
579 // don't need to be incremented for every packet.
580 if (PREDICT_FALSE (new_sw_if_index0 != stats_sw_if_index))
582 stats_n_packets -= 1;
583 stats_n_bytes -= len0;
585 if (new_sw_if_index0 != ~0)
586 vlib_increment_combined_counter
587 (vnm->interface_main.combined_sw_if_counters
588 + VNET_INTERFACE_COUNTER_RX,
589 cpu_index, new_sw_if_index0, 1, len0);
590 if (stats_n_packets > 0)
592 vlib_increment_combined_counter
593 (vnm->interface_main.combined_sw_if_counters
594 + VNET_INTERFACE_COUNTER_RX,
596 stats_sw_if_index, stats_n_packets, stats_n_bytes);
597 stats_n_packets = stats_n_bytes = 0;
599 stats_sw_if_index = new_sw_if_index0;
603 if (variant == ETHERNET_INPUT_VARIANT_NOT_L2)
606 determine_next_node (em, variant, is_l20, type0, b0, &error0,
609 b0->error = error_node->errors[error0];
611 // verify speculative enqueue
612 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
613 to_next, n_left_to_next,
617 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
620 // Increment any remaining batched stats
621 if (stats_n_packets > 0)
623 vlib_increment_combined_counter
624 (vnm->interface_main.combined_sw_if_counters
625 + VNET_INTERFACE_COUNTER_RX,
626 cpu_index, stats_sw_if_index, stats_n_packets, stats_n_bytes);
627 node->runtime_data[0] = stats_sw_if_index;
630 return from_frame->n_vectors;
634 ethernet_input (vlib_main_t * vm,
635 vlib_node_runtime_t * node, vlib_frame_t * from_frame)
637 return ethernet_input_inline (vm, node, from_frame,
638 ETHERNET_INPUT_VARIANT_ETHERNET);
642 ethernet_input_type (vlib_main_t * vm,
643 vlib_node_runtime_t * node, vlib_frame_t * from_frame)
645 return ethernet_input_inline (vm, node, from_frame,
646 ETHERNET_INPUT_VARIANT_ETHERNET_TYPE);
650 ethernet_input_not_l2 (vlib_main_t * vm,
651 vlib_node_runtime_t * node, vlib_frame_t * from_frame)
653 return ethernet_input_inline (vm, node, from_frame,
654 ETHERNET_INPUT_VARIANT_NOT_L2);
658 // Return the subinterface config struct for the given sw_if_index
659 // Also return via parameter the appropriate match flags for the
660 // configured number of tags.
661 // On error (unsupported or not ethernet) return 0.
662 static subint_config_t *
663 ethernet_sw_interface_get_config (vnet_main_t * vnm,
665 u32 * flags, u32 * unsupported)
667 ethernet_main_t *em = ðernet_main;
668 vnet_hw_interface_t *hi;
669 vnet_sw_interface_t *si;
670 main_intf_t *main_intf;
671 vlan_table_t *vlan_table;
672 qinq_table_t *qinq_table;
673 subint_config_t *subint = 0;
675 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
677 if (!hi || (hi->hw_class_index != ethernet_hw_interface_class.index))
680 goto done; // non-ethernet interface
683 // ensure there's an entry for the main intf (shouldn't really be necessary)
684 vec_validate (em->main_intfs, hi->hw_if_index);
685 main_intf = vec_elt_at_index (em->main_intfs, hi->hw_if_index);
687 // Locate the subint for the given ethernet config
688 si = vnet_get_sw_interface (vnm, sw_if_index);
690 if (si->sub.eth.flags.default_sub)
692 subint = &main_intf->default_subint;
693 *flags = SUBINT_CONFIG_MATCH_0_TAG |
694 SUBINT_CONFIG_MATCH_1_TAG |
695 SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG;
697 else if ((si->sub.eth.flags.no_tags) || (si->sub.eth.raw_flags == 0))
699 // if no flags are set then this is a main interface
700 // so treat as untagged
701 subint = &main_intf->untagged_subint;
702 *flags = SUBINT_CONFIG_MATCH_0_TAG;
707 // first get the vlan table
708 if (si->sub.eth.flags.dot1ad)
710 if (main_intf->dot1ad_vlans == 0)
712 // Allocate a vlan table from the pool
713 pool_get (em->vlan_pool, vlan_table);
714 main_intf->dot1ad_vlans = vlan_table - em->vlan_pool;
718 // Get ptr to existing vlan table
720 vec_elt_at_index (em->vlan_pool, main_intf->dot1ad_vlans);
725 if (main_intf->dot1q_vlans == 0)
727 // Allocate a vlan table from the pool
728 pool_get (em->vlan_pool, vlan_table);
729 main_intf->dot1q_vlans = vlan_table - em->vlan_pool;
733 // Get ptr to existing vlan table
735 vec_elt_at_index (em->vlan_pool, main_intf->dot1q_vlans);
739 if (si->sub.eth.flags.one_tag)
741 *flags = si->sub.eth.flags.exact_match ?
742 SUBINT_CONFIG_MATCH_1_TAG :
743 (SUBINT_CONFIG_MATCH_1_TAG |
744 SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG);
746 if (si->sub.eth.flags.outer_vlan_id_any)
748 // not implemented yet
754 // a single vlan, a common case
756 &vlan_table->vlans[si->sub.eth.
757 outer_vlan_id].single_tag_subint;
764 *flags = si->sub.eth.flags.exact_match ?
765 SUBINT_CONFIG_MATCH_2_TAG :
766 (SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG);
768 if (si->sub.eth.flags.outer_vlan_id_any
769 && si->sub.eth.flags.inner_vlan_id_any)
771 // not implemented yet
776 if (si->sub.eth.flags.inner_vlan_id_any)
778 // a specific outer and "any" inner
779 // don't need a qinq table for this
781 &vlan_table->vlans[si->sub.eth.
782 outer_vlan_id].inner_any_subint;
783 if (si->sub.eth.flags.exact_match)
785 *flags = SUBINT_CONFIG_MATCH_2_TAG;
789 *flags = SUBINT_CONFIG_MATCH_2_TAG |
790 SUBINT_CONFIG_MATCH_3_TAG;
795 // a specific outer + specifc innner vlan id, a common case
797 // get the qinq table
798 if (vlan_table->vlans[si->sub.eth.outer_vlan_id].qinqs == 0)
800 // Allocate a qinq table from the pool
801 pool_get (em->qinq_pool, qinq_table);
802 vlan_table->vlans[si->sub.eth.outer_vlan_id].qinqs =
803 qinq_table - em->qinq_pool;
807 // Get ptr to existing qinq table
809 vec_elt_at_index (em->qinq_pool,
810 vlan_table->vlans[si->sub.
814 subint = &qinq_table->vlans[si->sub.eth.inner_vlan_id].subint;
824 ethernet_sw_interface_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
826 subint_config_t *subint;
829 clib_error_t *error = 0;
831 // Find the config for this subinterface
833 ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags,
838 // not implemented yet or not ethernet
842 subint->sw_if_index =
843 ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ? sw_if_index : ~0);
849 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ethernet_sw_interface_up_down);
852 // Set the L2/L3 mode for the subinterface
854 ethernet_sw_interface_set_l2_mode (vnet_main_t * vnm, u32 sw_if_index, u32 l2)
856 subint_config_t *subint;
860 vnet_sw_interface_t *sw = vnet_get_sw_interface (vnm, sw_if_index);
862 is_port = !(sw->type == VNET_SW_INTERFACE_TYPE_SUB);
864 // Find the config for this subinterface
866 ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags,
871 // unimplemented or not ethernet
875 // Double check that the config we found is for our interface (or the interface is down)
876 ASSERT ((subint->sw_if_index == sw_if_index) | (subint->sw_if_index == ~0));
880 subint->flags |= SUBINT_CONFIG_L2;
883 SUBINT_CONFIG_MATCH_0_TAG | SUBINT_CONFIG_MATCH_1_TAG
884 | SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG;
888 subint->flags &= ~SUBINT_CONFIG_L2;
891 ~(SUBINT_CONFIG_MATCH_1_TAG | SUBINT_CONFIG_MATCH_2_TAG
892 | SUBINT_CONFIG_MATCH_3_TAG);
900 * Set the L2/L3 mode for the subinterface regardless of port
903 ethernet_sw_interface_set_l2_mode_noport (vnet_main_t * vnm,
904 u32 sw_if_index, u32 l2)
906 subint_config_t *subint;
910 /* Find the config for this subinterface */
912 ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags,
917 /* unimplemented or not ethernet */
922 * Double check that the config we found is for our interface (or the
925 ASSERT ((subint->sw_if_index == sw_if_index) | (subint->sw_if_index == ~0));
929 subint->flags |= SUBINT_CONFIG_L2;
933 subint->flags &= ~SUBINT_CONFIG_L2;
940 static clib_error_t *
941 ethernet_sw_interface_add_del (vnet_main_t * vnm,
942 u32 sw_if_index, u32 is_create)
944 clib_error_t *error = 0;
945 subint_config_t *subint;
949 // Find the config for this subinterface
951 ethernet_sw_interface_get_config (vnm, sw_if_index, &match_flags,
956 // not implemented yet or not ethernet
959 // this is the NYI case
960 error = clib_error_return (0, "not implemented yet");
971 // Initialize the subint
972 if (subint->flags & SUBINT_CONFIG_VALID)
974 // Error vlan already in use
975 error = clib_error_return (0, "vlan is already in use");
979 // Note that config is L3 by defaulty
980 subint->flags = SUBINT_CONFIG_VALID | match_flags;
981 subint->sw_if_index = ~0; // because interfaces are initially down
988 VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ethernet_sw_interface_add_del);
990 static char *ethernet_error_strings[] = {
991 #define ethernet_error(n,c,s) s,
993 #undef ethernet_error
997 VLIB_REGISTER_NODE (ethernet_input_node) = {
998 .function = ethernet_input,
999 .name = "ethernet-input",
1000 /* Takes a vector of packets. */
1001 .vector_size = sizeof (u32),
1002 .n_errors = ETHERNET_N_ERROR,
1003 .error_strings = ethernet_error_strings,
1004 .n_next_nodes = ETHERNET_INPUT_N_NEXT,
1006 #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
1007 foreach_ethernet_input_next
1010 .format_buffer = format_ethernet_header_with_length,
1011 .format_trace = format_ethernet_input_trace,
1012 .unformat_buffer = unformat_ethernet_header,
1017 VLIB_NODE_FUNCTION_MULTIARCH (ethernet_input_node, ethernet_input)
1021 VLIB_REGISTER_NODE (ethernet_input_type_node, static) = {
1022 .function = ethernet_input_type,
1023 .name = "ethernet-input-type",
1024 /* Takes a vector of packets. */
1025 .vector_size = sizeof (u32),
1026 .n_next_nodes = ETHERNET_INPUT_N_NEXT,
1028 #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
1029 foreach_ethernet_input_next
1036 VLIB_NODE_FUNCTION_MULTIARCH (ethernet_input_type_node, ethernet_input_type)
1040 VLIB_REGISTER_NODE (ethernet_input_not_l2_node, static) = {
1041 .function = ethernet_input_not_l2,
1042 .name = "ethernet-input-not-l2",
1043 /* Takes a vector of packets. */
1044 .vector_size = sizeof (u32),
1045 .n_next_nodes = ETHERNET_INPUT_N_NEXT,
1047 #define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
1048 foreach_ethernet_input_next
1056 VLIB_NODE_FUNCTION_MULTIARCH (ethernet_input_not_l2_node,
1057 ethernet_input_not_l2)
1062 ethernet_set_rx_redirect (vnet_main_t * vnm,
1063 vnet_hw_interface_t * hi, u32 enable)
1065 // Insure all packets go to ethernet-input (i.e. untagged ipv4 packets
1066 // don't go directly to ip4-input)
1067 vnet_hw_interface_rx_redirect_to_node
1068 (vnm, hi->hw_if_index, enable ? ethernet_input_node.index : ~0);
1073 * Initialization and registration for the next_by_ethernet structure
1077 next_by_ethertype_init (next_by_ethertype_t * l3_next)
1079 l3_next->input_next_by_type = sparse_vec_new
1080 ( /* elt bytes */ sizeof (l3_next->input_next_by_type[0]),
1081 /* bits in index */ BITS (((ethernet_header_t *) 0)->type));
1083 vec_validate (l3_next->sparse_index_by_input_next_index,
1084 ETHERNET_INPUT_NEXT_DROP);
1085 vec_validate (l3_next->sparse_index_by_input_next_index,
1086 ETHERNET_INPUT_NEXT_PUNT);
1087 l3_next->sparse_index_by_input_next_index[ETHERNET_INPUT_NEXT_DROP] =
1088 SPARSE_VEC_INVALID_INDEX;
1089 l3_next->sparse_index_by_input_next_index[ETHERNET_INPUT_NEXT_PUNT] =
1090 SPARSE_VEC_INVALID_INDEX;
1093 * Make sure we don't wipe out an ethernet registration by mistake
1094 * Can happen if init function ordering constraints are missing.
1098 ethernet_main_t *em = ðernet_main;
1099 ASSERT (em->next_by_ethertype_register_called == 0);
1105 // Add an ethertype -> next index mapping to the structure
1107 next_by_ethertype_register (next_by_ethertype_t * l3_next,
1108 u32 ethertype, u32 next_index)
1112 ethernet_main_t *em = ðernet_main;
1116 ethernet_main_t *em = ðernet_main;
1117 em->next_by_ethertype_register_called = 1;
1120 /* Setup ethernet type -> next index sparse vector mapping. */
1121 n = sparse_vec_validate (l3_next->input_next_by_type, ethertype);
1124 /* Rebuild next index -> sparse index inverse mapping when sparse vector
1126 vec_validate (l3_next->sparse_index_by_input_next_index, next_index);
1127 for (i = 1; i < vec_len (l3_next->input_next_by_type); i++)
1129 sparse_index_by_input_next_index[l3_next->input_next_by_type[i]] = i;
1131 // do not allow the cached next index's to be updated if L3
1132 // redirect is enabled, as it will have overwritten them
1133 if (!em->redirect_l3)
1135 // Cache common ethertypes directly
1136 if (ethertype == ETHERNET_TYPE_IP4)
1138 l3_next->input_next_ip4 = next_index;
1140 else if (ethertype == ETHERNET_TYPE_IP6)
1142 l3_next->input_next_ip6 = next_index;
1144 else if (ethertype == ETHERNET_TYPE_MPLS_UNICAST)
1146 l3_next->input_next_mpls = next_index;
1153 static clib_error_t *
1154 ethernet_input_init (vlib_main_t * vm)
1156 ethernet_main_t *em = ðernet_main;
1157 __attribute__ ((unused)) vlan_table_t *invalid_vlan_table;
1158 __attribute__ ((unused)) qinq_table_t *invalid_qinq_table;
1160 ethernet_setup_node (vm, ethernet_input_node.index);
1161 ethernet_setup_node (vm, ethernet_input_type_node.index);
1162 ethernet_setup_node (vm, ethernet_input_not_l2_node.index);
1164 next_by_ethertype_init (&em->l3_next);
1166 // Initialize pools and vector for vlan parsing
1167 vec_validate (em->main_intfs, 10); // 10 main interfaces
1168 pool_alloc (em->vlan_pool, 10);
1169 pool_alloc (em->qinq_pool, 1);
1171 // The first vlan pool will always be reserved for an invalid table
1172 pool_get (em->vlan_pool, invalid_vlan_table); // first id = 0
1173 // The first qinq pool will always be reserved for an invalid table
1174 pool_get (em->qinq_pool, invalid_qinq_table); // first id = 0
1179 VLIB_INIT_FUNCTION (ethernet_input_init);
1182 ethernet_register_input_type (vlib_main_t * vm,
1183 ethernet_type_t type, u32 node_index)
1185 ethernet_main_t *em = ðernet_main;
1186 ethernet_type_info_t *ti;
1190 clib_error_t *error = vlib_call_init_function (vm, ethernet_init);
1192 clib_error_report (error);
1195 ti = ethernet_get_type_info (em, type);
1196 ti->node_index = node_index;
1197 ti->next_index = vlib_node_add_next (vm,
1198 ethernet_input_node.index, node_index);
1199 i = vlib_node_add_next (vm, ethernet_input_type_node.index, node_index);
1200 ASSERT (i == ti->next_index);
1202 i = vlib_node_add_next (vm, ethernet_input_not_l2_node.index, node_index);
1203 ASSERT (i == ti->next_index);
1205 // Add the L3 node for this ethertype to the next nodes structure
1206 next_by_ethertype_register (&em->l3_next, type, ti->next_index);
1208 // Call the registration functions for other nodes that want a mapping
1209 l2bvi_register_input_type (vm, type, node_index);
1213 ethernet_register_l2_input (vlib_main_t * vm, u32 node_index)
1215 ethernet_main_t *em = ðernet_main;
1219 vlib_node_add_next (vm, ethernet_input_node.index, node_index);
1222 * Even if we never use these arcs, we have to align the next indices...
1224 i = vlib_node_add_next (vm, ethernet_input_type_node.index, node_index);
1226 ASSERT (i == em->l2_next);
1228 i = vlib_node_add_next (vm, ethernet_input_not_l2_node.index, node_index);
1229 ASSERT (i == em->l2_next);
1232 // Register a next node for L3 redirect, and enable L3 redirect
1234 ethernet_register_l3_redirect (vlib_main_t * vm, u32 node_index)
1236 ethernet_main_t *em = ðernet_main;
1239 em->redirect_l3 = 1;
1240 em->redirect_l3_next = vlib_node_add_next (vm,
1241 ethernet_input_node.index,
1244 * Change the cached next nodes to the redirect node
1246 em->l3_next.input_next_ip4 = em->redirect_l3_next;
1247 em->l3_next.input_next_ip6 = em->redirect_l3_next;
1248 em->l3_next.input_next_mpls = em->redirect_l3_next;
1251 * Even if we never use these arcs, we have to align the next indices...
1253 i = vlib_node_add_next (vm, ethernet_input_type_node.index, node_index);
1255 ASSERT (i == em->redirect_l3_next);
1259 * fd.io coding-style-patch-verification: ON
1262 * eval: (c-set-style "gnu")