2 * Copyright (c) 2016 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 #include <vnet/adj/adj_nbr.h>
17 #include <vnet/adj/adj_internal.h>
18 #include <vnet/ethernet/arp_packet.h>
19 #include <vnet/fib/fib_walk.h>
22 * Vector Hash tables of neighbour (traditional) adjacencies
23 * Key: interface(for the vector index), address (and its proto),
24 * link-type/ether-type.
26 static uword **adj_nbr_tables[FIB_PROTOCOL_IP_MAX];
28 typedef struct adj_nbr_key_t_
30 ip46_address_t ank_ip;
34 #define ADJ_NBR_SET_KEY(_key, _lt, _nh) \
36 ip46_address_copy(&(_key).ank_ip, (_nh)); \
37 _key.ank_linkt = (_lt); \
40 #define ADJ_NBR_ITF_OK(_proto, _itf) \
41 (((_itf) < vec_len(adj_nbr_tables[_proto])) && \
42 (NULL != adj_nbr_tables[_proto][(_itf)]))
44 #define ADJ_NBR_ASSERT_NH_PROTO(nh_proto, err) \
46 ASSERT (nh_proto < FIB_PROTOCOL_IP_MAX); \
47 const fib_protocol_t nh_proto__ = (nh_proto); \
48 if (nh_proto__ >= FIB_PROTOCOL_IP_MAX) \
50 clib_warning ("BUG: protocol %d > %d\n", \
52 FIB_PROTOCOL_IP_MAX); \
58 adj_nbr_insert (fib_protocol_t nh_proto,
59 vnet_link_t link_type,
60 const ip46_address_t *nh_addr,
62 adj_index_t adj_index)
66 ADJ_NBR_ASSERT_NH_PROTO (nh_proto,);
68 if (sw_if_index >= vec_len(adj_nbr_tables[nh_proto]))
70 vec_validate(adj_nbr_tables[nh_proto], sw_if_index);
72 if (NULL == adj_nbr_tables[nh_proto][sw_if_index])
74 adj_nbr_tables[nh_proto][sw_if_index] =
75 hash_create_mem(0, sizeof(adj_nbr_key_t), sizeof(adj_index_t));
78 ADJ_NBR_SET_KEY(kv, link_type, nh_addr);
80 hash_set_mem_alloc (&adj_nbr_tables[nh_proto][sw_if_index],
85 adj_nbr_remove (adj_index_t ai,
86 fib_protocol_t nh_proto,
87 vnet_link_t link_type,
88 const ip46_address_t *nh_addr,
93 ADJ_NBR_ASSERT_NH_PROTO (nh_proto,);
95 if (!ADJ_NBR_ITF_OK(nh_proto, sw_if_index))
98 ADJ_NBR_SET_KEY(kv, link_type, nh_addr);
100 hash_unset_mem_free(&adj_nbr_tables[nh_proto][sw_if_index], &kv);
102 if (0 == hash_elts(adj_nbr_tables[nh_proto][sw_if_index]))
104 hash_free(adj_nbr_tables[nh_proto][sw_if_index]);
109 adj_nbr_find (fib_protocol_t nh_proto,
110 vnet_link_t link_type,
111 const ip46_address_t *nh_addr,
117 ADJ_NBR_ASSERT_NH_PROTO (nh_proto, ADJ_INDEX_INVALID);
119 ADJ_NBR_SET_KEY(kv, link_type, nh_addr);
121 if (!ADJ_NBR_ITF_OK(nh_proto, sw_if_index))
122 return (ADJ_INDEX_INVALID);
124 p = hash_get_mem(adj_nbr_tables[nh_proto][sw_if_index], &kv);
130 return (ADJ_INDEX_INVALID);
134 adj_get_nd_node (fib_protocol_t proto)
137 case FIB_PROTOCOL_IP4:
138 return (ip4_arp_node.index);
139 case FIB_PROTOCOL_IP6:
140 return (ip6_discover_neighbor_node.index);
141 case FIB_PROTOCOL_MPLS:
145 return (ip4_arp_node.index);
149 * @brief Check and set feature flags if o/p interface has any o/p features.
152 adj_nbr_evaluate_feature (adj_index_t ai)
155 vnet_feature_main_t *fm = &feature_main;
162 switch (adj->ia_link)
165 arc_index = ip4_main.lookup_main.output_feature_arc_index;
168 arc_index = ip6_main.lookup_main.output_feature_arc_index;
171 arc_index = mpls_main.output_feature_arc_index;
177 sw_if_index = adj->rewrite_header.sw_if_index;
178 if (vec_len(fm->feature_count_by_sw_if_index[arc_index]) > sw_if_index)
180 feature_count = fm->feature_count_by_sw_if_index[arc_index][sw_if_index];
181 if (feature_count > 0)
183 vnet_feature_config_main_t *cm;
185 adj->rewrite_header.flags |= VNET_REWRITE_HAS_FEATURES;
186 cm = &fm->feature_config_mains[arc_index];
188 adj->ia_cfg_index = vec_elt (cm->config_index_by_sw_if_index,
195 static ip_adjacency_t*
196 adj_nbr_alloc (fib_protocol_t nh_proto,
197 vnet_link_t link_type,
198 const ip46_address_t *nh_addr,
203 adj = adj_alloc(nh_proto);
205 adj_nbr_insert(nh_proto, link_type, nh_addr,
210 * since we just added the ADJ we have no rewrite string for it,
213 adj->lookup_next_index = IP_LOOKUP_NEXT_ARP;
214 adj->sub_type.nbr.next_hop = *nh_addr;
215 adj->ia_link = link_type;
216 adj->ia_nh_proto = nh_proto;
217 adj->rewrite_header.sw_if_index = sw_if_index;
218 vnet_rewrite_update_mtu(vnet_get_main(), adj->ia_link,
219 &adj->rewrite_header);
221 adj_nbr_evaluate_feature (adj_get_index(adj));
226 adj_nbr_set_mtu (adj_index_t adj_index, u16 mtu)
230 ASSERT(ADJ_INDEX_INVALID != adj_index);
232 adj = adj_get(adj_index);
235 vnet_rewrite_update_mtu(vnet_get_main(), adj->ia_link,
236 &adj->rewrite_header);
239 vnet_rewrite_update_mtu(vnet_get_main(), adj->ia_link,
240 &adj->rewrite_header);
241 adj->rewrite_header.max_l3_packet_bytes =
242 clib_min (adj->rewrite_header.max_l3_packet_bytes, mtu);
247 * adj_nbr_add_or_lock
249 * Add an adjacency for the neighbour requested.
251 * The key for an adj is:
252 * - the Next-hops protocol (i.e. v4 or v6)
253 * - the address of the next-hop
254 * - the interface the next-hop is reachable through
257 adj_nbr_add_or_lock (fib_protocol_t nh_proto,
258 vnet_link_t link_type,
259 const ip46_address_t *nh_addr,
262 adj_index_t adj_index;
264 adj_index = adj_nbr_find(nh_proto, link_type, nh_addr, sw_if_index);
266 if (ADJ_INDEX_INVALID == adj_index)
271 vnm = vnet_get_main();
272 adj = adj_nbr_alloc(nh_proto, link_type, nh_addr, sw_if_index);
273 adj_index = adj_get_index(adj);
276 if (ip46_address_is_equal(&ADJ_BCAST_ADDR, nh_addr))
278 adj->lookup_next_index = IP_LOOKUP_NEXT_BCAST;
281 vnet_rewrite_init(vnm, sw_if_index, link_type,
282 adj_get_nd_node(nh_proto),
283 vnet_tx_node_index_for_sw_interface(vnm, sw_if_index),
284 &adj->rewrite_header);
287 * we need a rewrite where the destination IP address is converted
288 * to the appropriate link-layer address. This is interface specific.
289 * So ask the interface to do it.
291 vnet_update_adjacency_for_sw_interface(vnm, sw_if_index, adj_index);
292 adj_delegate_adj_created(adj_get(adj_index));
303 adj_nbr_add_or_lock_w_rewrite (fib_protocol_t nh_proto,
304 vnet_link_t link_type,
305 const ip46_address_t *nh_addr,
309 adj_index_t adj_index;
311 adj_index = adj_nbr_find(nh_proto, link_type, nh_addr, sw_if_index);
313 if (ADJ_INDEX_INVALID == adj_index)
317 adj = adj_nbr_alloc(nh_proto, link_type, nh_addr, sw_if_index);
318 adj->rewrite_header.sw_if_index = sw_if_index;
319 adj_index = adj_get_index(adj);
323 adj_nbr_update_rewrite(adj_index,
324 ADJ_NBR_REWRITE_FLAG_COMPLETE,
327 adj_delegate_adj_created(adj_get(adj_index));
333 * adj_nbr_update_rewrite
335 * Update the adjacency's rewrite string. A NULL string implies the
336 * rewrite is reset (i.e. when ARP/ND entry is gone).
337 * NB: the adj being updated may be handling traffic in the DP.
340 adj_nbr_update_rewrite (adj_index_t adj_index,
341 adj_nbr_rewrite_flag_t flags,
346 ASSERT(ADJ_INDEX_INVALID != adj_index);
348 adj = adj_get(adj_index);
350 if (flags & ADJ_NBR_REWRITE_FLAG_COMPLETE)
353 * update the adj's rewrite string and build the arc
354 * from the rewrite node to the interface's TX node
356 adj_nbr_update_rewrite_internal(adj, IP_LOOKUP_NEXT_REWRITE,
357 adj_get_rewrite_node(adj->ia_link),
358 vnet_tx_node_index_for_sw_interface(
360 adj->rewrite_header.sw_if_index),
365 adj_nbr_update_rewrite_internal(adj, IP_LOOKUP_NEXT_ARP,
366 adj_get_nd_node(adj->ia_nh_proto),
367 vnet_tx_node_index_for_sw_interface(
369 adj->rewrite_header.sw_if_index),
375 * adj_nbr_update_rewrite_internal
377 * Update the adjacency's rewrite string. A NULL string implies the
378 * rewrite is reset (i.e. when ARP/ND entry is gone).
379 * NB: the adj being updated may be handling traffic in the DP.
382 adj_nbr_update_rewrite_internal (ip_adjacency_t *adj,
383 ip_lookup_next_t adj_next_index,
388 ip_adjacency_t *walk_adj;
389 adj_index_t walk_ai, ai;
394 vm = vlib_get_main();
395 old_next = adj->lookup_next_index;
397 ai = walk_ai = adj_get_index(adj);
398 if (VNET_LINK_MPLS == adj->ia_link)
401 * The link type MPLS has no children in the control plane graph, it only
402 * has children in the data-plane graph. The backwalk is up the former.
403 * So we need to walk from its IP cousin.
405 walk_ai = adj_nbr_find(adj->ia_nh_proto,
406 fib_proto_to_link(adj->ia_nh_proto),
407 &adj->sub_type.nbr.next_hop,
408 adj->rewrite_header.sw_if_index);
412 * Don't call the walk re-entrantly
414 if (ADJ_INDEX_INVALID != walk_ai)
416 walk_adj = adj_get(walk_ai);
417 if (ADJ_FLAG_SYNC_WALK_ACTIVE & walk_adj->ia_flags)
424 * Prevent re-entrant walk of the same adj
426 walk_adj->ia_flags |= ADJ_FLAG_SYNC_WALK_ACTIVE;
436 * lock the adjacencies that are affected by updates this walk will provoke.
437 * Since the aim of the walk is to update children to link to a different
438 * DPO, this adj will no longer be in use and its lock count will drop to 0.
439 * We don't want it to be deleted as part of this endeavour.
445 * Updating a rewrite string is not atomic;
446 * - the rewrite string is too long to write in one instruction
447 * - when swapping from incomplete to complete, we also need to update
448 * the VLIB graph next-index of the adj.
449 * ideally we would only want to suspend forwarding via this adj whilst we
450 * do this, but we do not have that level of granularity - it's suspend all
451 * worker threads or nothing.
452 * The other choices are:
453 * - to mark the adj down and back walk so child load-balances drop this adj
455 * - update the next_node index of this adj to point to error-drop
456 * both of which will mean for MAC change we will drop for this adj
457 * which is not acceptable. However, when the adj changes type (from
458 * complete to incomplete and vice-versa) the child DPOs, which have the
459 * VLIB graph next node index, will be sending packets to the wrong graph
460 * node. So from the options above, updating the next_node of the adj to
461 * be drop will work, but it relies on each graph node v4/v6/mpls, rewrite/
462 * arp/midchain always be valid w.r.t. a mis-match of adj type and node type
463 * (i.e. a rewrite adj in the arp node). This is not enforceable. Getting it
464 * wrong will lead to hard to find bugs since its a race condition. So we
465 * choose the more reliable method of updating the children to use the drop,
466 * then switching adj's type, then updating the children again. Did I mention
467 * that this doesn't happen often...
468 * So we need to distinguish between the two cases:
470 * 2 - adj type change
473 old_next != adj_next_index &&
474 ADJ_INDEX_INVALID != walk_ai)
477 * the adj is changing type. we need to fix all children so that they
478 * stack momentarily on a drop, while the adj changes. If we don't do
479 * this the children will send packets to a VLIB graph node that does
480 * not correspond to the adj's type - and it goes downhill from there.
482 fib_node_back_walk_ctx_t bw_ctx = {
483 .fnbw_reason = FIB_NODE_BW_REASON_FLAG_ADJ_DOWN,
485 * force this walk to be synchronous. if we don't and a node in the graph
486 * (a heavily shared path-list) chooses to back-ground the walk (make it
487 * async) then it will pause and we will do the adj update below, before
488 * all the children are updated. not good.
490 .fnbw_flags = FIB_NODE_BW_FLAG_FORCE_SYNC,
493 fib_walk_sync(FIB_NODE_TYPE_ADJ, walk_ai, &bw_ctx);
495 * fib_walk_sync may allocate a new adjacency and potentially cuase a
496 * realloc for adj_pool. When that happens, adj pointer is no longer
497 * valid here. We refresh the adj pointer accordingly.
503 * If we are just updating the MAC string of the adj (which we also can't
504 * do atomically), then we need to stop packets switching through the adj.
505 * We can't do that on a per-adj basis, so it's all the packets.
506 * If we are updating the type, and we walked back to the children above,
507 * then this barrier serves to flush the queues/frames.
509 vlib_worker_thread_barrier_sync(vm);
511 adj->lookup_next_index = adj_next_index;
512 adj->ia_node_index = this_node;
517 * new rewrite provided.
518 * fill in the adj's rewrite string, and build the VLIB graph arc.
520 vnet_rewrite_set_data_internal(&adj->rewrite_header,
521 sizeof(adj->rewrite_data),
528 vnet_rewrite_clear_data_internal(&adj->rewrite_header,
529 sizeof(adj->rewrite_data));
531 adj->rewrite_header.next_index = vlib_node_add_next(vlib_get_main(),
536 * done with the rewrite update - let the workers loose.
538 vlib_worker_thread_barrier_release(vm);
541 (old_next != adj->lookup_next_index) &&
542 (ADJ_INDEX_INVALID != walk_ai))
545 * backwalk to the children so they can stack on the now updated
548 fib_node_back_walk_ctx_t bw_ctx = {
549 .fnbw_reason = FIB_NODE_BW_REASON_FLAG_ADJ_UPDATE,
552 fib_walk_sync(FIB_NODE_TYPE_ADJ, walk_ai, &bw_ctx);
555 * Prevent re-entrant walk of the same adj
559 walk_adj = adj_get(walk_ai);
560 walk_adj->ia_flags &= ~ADJ_FLAG_SYNC_WALK_ACTIVE;
563 adj_delegate_adj_modified(adj);
569 adj_nbr_db_size (void)
571 fib_protocol_t proto;
575 for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++)
577 vec_foreach_index(sw_if_index, adj_nbr_tables[proto])
579 if (NULL != adj_nbr_tables[proto][sw_if_index])
581 count += hash_elts(adj_nbr_tables[proto][sw_if_index]);
589 * @brief Walk all adjacencies on a link for a given next-hop protocol
592 adj_nbr_walk (u32 sw_if_index,
593 fib_protocol_t adj_nh_proto,
597 adj_index_t ai, *ais, *aip;
600 ADJ_NBR_ASSERT_NH_PROTO (adj_nh_proto,);
602 if (!ADJ_NBR_ITF_OK(adj_nh_proto, sw_if_index))
607 /* elements may be removed from the table during the walk, so
608 * collect the set first then process them */
609 hash_foreach_mem (key, ai, adj_nbr_tables[adj_nh_proto][sw_if_index],
614 vec_foreach(aip, ais)
616 /* An adj may be deleted during the walk so check first */
617 if (!pool_is_free_index(adj_pool, *aip))
624 * @brief Walk adjacencies on a link with a given v4 next-hop.
625 * that is visit the adjacencies with different link types.
628 adj_nbr_walk_nh4 (u32 sw_if_index,
629 const ip4_address_t *addr,
633 if (!ADJ_NBR_ITF_OK(FIB_PROTOCOL_IP4, sw_if_index))
636 ip46_address_t nh = {
642 FOR_EACH_VNET_LINK(linkt)
644 ai = adj_nbr_find (FIB_PROTOCOL_IP4, linkt, &nh, sw_if_index);
646 if (INDEX_INVALID != ai)
652 * @brief Walk adjacencies on a link with a given v6 next-hop.
653 * that is visit the adjacencies with different link types.
656 adj_nbr_walk_nh6 (u32 sw_if_index,
657 const ip6_address_t *addr,
661 if (!ADJ_NBR_ITF_OK(FIB_PROTOCOL_IP6, sw_if_index))
664 ip46_address_t nh = {
670 FOR_EACH_VNET_LINK(linkt)
672 ai = adj_nbr_find (FIB_PROTOCOL_IP6, linkt, &nh, sw_if_index);
674 if (INDEX_INVALID != ai)
680 * @brief Walk adjacencies on a link with a given next-hop.
681 * that is visit the adjacencies with different link types.
684 adj_nbr_walk_nh (u32 sw_if_index,
685 fib_protocol_t adj_nh_proto,
686 const ip46_address_t *nh,
690 ADJ_NBR_ASSERT_NH_PROTO (adj_nh_proto,);
692 if (!ADJ_NBR_ITF_OK(adj_nh_proto, sw_if_index))
695 switch (adj_nh_proto)
697 case FIB_PROTOCOL_IP4:
698 adj_nbr_walk_nh4(sw_if_index, &nh->ip4, cb, ctx);
700 case FIB_PROTOCOL_IP6:
701 adj_nbr_walk_nh6(sw_if_index, &nh->ip6, cb, ctx);
703 case FIB_PROTOCOL_MPLS:
710 * Flags associated with the interface state walks
712 typedef enum adj_nbr_interface_flags_t_
714 ADJ_NBR_INTERFACE_UP = (1 << 0),
715 } adj_nbr_interface_flags_t;
718 * Context for the state change walk of the DB
720 typedef struct adj_nbr_interface_state_change_ctx_t_
723 * Flags on the interface
725 adj_nbr_interface_flags_t flags;
726 } adj_nbr_interface_state_change_ctx_t;
729 adj_nbr_interface_state_change_one (adj_index_t ai,
733 * Back walk the graph to inform the forwarding entries
734 * that this interface state has changed. Do this synchronously
735 * since this is the walk that provides convergence
737 adj_nbr_interface_state_change_ctx_t *ctx = arg;
738 fib_node_back_walk_ctx_t bw_ctx = {
739 .fnbw_reason = ((ctx->flags & ADJ_NBR_INTERFACE_UP) ?
740 FIB_NODE_BW_REASON_FLAG_INTERFACE_UP :
741 FIB_NODE_BW_REASON_FLAG_INTERFACE_DOWN),
743 * the force sync applies only as far as the first fib_entry.
744 * And it's the fib_entry's we need to converge away from
745 * the adjacencies on the now down link
747 .fnbw_flags = (!(ctx->flags & ADJ_NBR_INTERFACE_UP) ?
748 FIB_NODE_BW_FLAG_FORCE_SYNC :
749 FIB_NODE_BW_FLAG_NONE),
757 adj->ia_flags |= ADJ_FLAG_SYNC_WALK_ACTIVE;
758 fib_walk_sync(FIB_NODE_TYPE_ADJ, ai, &bw_ctx);
759 adj->ia_flags &= ~ADJ_FLAG_SYNC_WALK_ACTIVE;
762 return (ADJ_WALK_RC_CONTINUE);
766 * @brief Registered function for SW interface state changes
768 static clib_error_t *
769 adj_nbr_sw_interface_state_change (vnet_main_t * vnm,
773 fib_protocol_t proto;
776 * walk each adj on the interface and trigger a walk from that adj
778 for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++)
780 adj_nbr_interface_state_change_ctx_t ctx = {
781 .flags = ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ?
782 ADJ_NBR_INTERFACE_UP :
786 adj_nbr_walk(sw_if_index, proto,
787 adj_nbr_interface_state_change_one,
794 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION_PRIO(
795 adj_nbr_sw_interface_state_change,
796 VNET_ITF_FUNC_PRIORITY_HIGH);
799 * @brief Invoked on each SW interface of a HW interface when the
800 * HW interface state changes
803 adj_nbr_hw_sw_interface_state_change (vnet_main_t * vnm,
807 adj_nbr_interface_state_change_ctx_t *ctx = arg;
808 fib_protocol_t proto;
811 * walk each adj on the interface and trigger a walk from that adj
813 for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++)
815 adj_nbr_walk(sw_if_index, proto,
816 adj_nbr_interface_state_change_one,
819 return (WALK_CONTINUE);
823 * @brief Registered callback for HW interface state changes
825 static clib_error_t *
826 adj_nbr_hw_interface_state_change (vnet_main_t * vnm,
831 * walk SW interface on the HW
833 adj_nbr_interface_state_change_ctx_t ctx = {
834 .flags = ((flags & VNET_HW_INTERFACE_FLAG_LINK_UP) ?
835 ADJ_NBR_INTERFACE_UP :
839 vnet_hw_interface_walk_sw(vnm, hw_if_index,
840 adj_nbr_hw_sw_interface_state_change,
846 VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION_PRIO(
847 adj_nbr_hw_interface_state_change,
848 VNET_ITF_FUNC_PRIORITY_HIGH);
851 adj_nbr_interface_delete_one (adj_index_t ai,
855 * Back walk the graph to inform the forwarding entries
856 * that this interface has been deleted.
858 fib_node_back_walk_ctx_t bw_ctx = {
859 .fnbw_reason = FIB_NODE_BW_REASON_FLAG_INTERFACE_DELETE,
867 adj->ia_flags |= ADJ_FLAG_SYNC_WALK_ACTIVE;
868 fib_walk_sync(FIB_NODE_TYPE_ADJ, ai, &bw_ctx);
869 adj->ia_flags &= ~ADJ_FLAG_SYNC_WALK_ACTIVE;
872 return (ADJ_WALK_RC_CONTINUE);
876 * adj_nbr_interface_add_del
878 * Registered to receive interface Add and delete notifications
880 static clib_error_t *
881 adj_nbr_interface_add_del (vnet_main_t * vnm,
885 fib_protocol_t proto;
890 * not interested in interface additions. we will not back walk
891 * to resolve paths through newly added interfaces. Why? The control
892 * plane should have the brains to add interfaces first, then routes.
893 * So the case where there are paths with a interface that matches
894 * one just created is the case where the path resolved through an
895 * interface that was deleted, and still has not been removed. The
896 * new interface added, is NO GUARANTEE that the interface being
897 * added now, even though it may have the same sw_if_index, is the
898 * same interface that the path needs. So tough!
899 * If the control plane wants these routes to resolve it needs to
900 * remove and add them again.
905 for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++)
907 adj_nbr_walk(sw_if_index, proto,
908 adj_nbr_interface_delete_one,
915 VNET_SW_INTERFACE_ADD_DEL_FUNCTION(adj_nbr_interface_add_del);
919 adj_nbr_ethernet_mac_change_one (adj_index_t ai,
922 vnet_update_adjacency_for_sw_interface(vnet_get_main(),
923 adj_get_sw_if_index(ai),
926 return (ADJ_WALK_RC_CONTINUE);
930 * Callback function invoked when an interface's MAC Address changes
933 adj_nbr_ethernet_change_mac (ethernet_main_t * em,
934 u32 sw_if_index, uword opaque)
936 fib_protocol_t proto;
938 FOR_EACH_FIB_IP_PROTOCOL(proto)
940 adj_nbr_walk(sw_if_index, proto,
941 adj_nbr_ethernet_mac_change_one,
947 adj_nbr_show_one (adj_index_t ai,
950 vlib_cli_output (arg, "[@%d] %U",
952 format_ip_adjacency, ai,
953 FORMAT_IP_ADJACENCY_NONE);
955 return (ADJ_WALK_RC_CONTINUE);
958 static clib_error_t *
959 adj_nbr_show (vlib_main_t * vm,
960 unformat_input_t * input,
961 vlib_cli_command_t * cmd)
963 adj_index_t ai = ADJ_INDEX_INVALID;
964 ip46_address_t nh = ip46_address_initializer;
965 u32 sw_if_index = ~0;
967 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
969 if (unformat (input, "%U",
970 unformat_vnet_sw_interface, vnet_get_main(),
973 else if (unformat (input, "%U",
974 unformat_ip46_address, &nh, IP46_TYPE_ANY))
976 else if (unformat (input, "%d", &ai))
982 if (ADJ_INDEX_INVALID != ai)
984 vlib_cli_output (vm, "[@%d] %U",
986 format_ip_adjacency, ai,
987 FORMAT_IP_ADJACENCY_DETAIL);
989 else if (~0 != sw_if_index)
991 fib_protocol_t proto;
993 if (ip46_address_is_zero(&nh))
995 for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++)
997 adj_nbr_walk(sw_if_index, proto,
1004 proto = (ip46_address_is_ip4(&nh) ?
1007 adj_nbr_walk_nh(sw_if_index, proto, &nh,
1014 fib_protocol_t proto;
1016 for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++)
1018 vec_foreach_index(sw_if_index, adj_nbr_tables[proto])
1020 adj_nbr_walk(sw_if_index, proto,
1031 * Show all neighbour adjacencies.
1033 * @cliexstart{sh adj nbr}
1034 * [@2] ipv4 via 1.0.0.2 loop0: IP4: 00:00:22:aa:bb:cc -> 00:00:11:aa:bb:cc
1035 * [@3] mpls via 1.0.0.2 loop0: MPLS_UNICAST: 00:00:22:aa:bb:cc -> 00:00:11:aa:bb:cc
1036 * [@4] ipv4 via 1.0.0.3 loop0: IP4: 00:00:22:aa:bb:cc -> 00:00:11:aa:bb:cc
1037 * [@5] mpls via 1.0.0.3 loop0: MPLS_UNICAST: 00:00:22:aa:bb:cc -> 00:00:11:aa:bb:cc
1040 VLIB_CLI_COMMAND (ip4_show_fib_command, static) = {
1041 .path = "show adj nbr",
1042 .short_help = "show adj nbr [<adj_index>] [interface]",
1043 .function = adj_nbr_show,
1047 format_adj_nbr_incomplete (u8* s, va_list *ap)
1049 index_t index = va_arg(*ap, index_t);
1050 CLIB_UNUSED(u32 indent) = va_arg(*ap, u32);
1051 vnet_main_t * vnm = vnet_get_main();
1052 ip_adjacency_t * adj = adj_get(index);
1054 s = format (s, "arp-%U", format_vnet_link, adj->ia_link);
1055 s = format (s, ": via %U",
1056 format_ip46_address, &adj->sub_type.nbr.next_hop,
1057 adj_proto_to_46(adj->ia_nh_proto));
1058 s = format (s, " %U",
1059 format_vnet_sw_if_index_name,
1060 vnm, adj->rewrite_header.sw_if_index);
1066 format_adj_nbr (u8* s, va_list *ap)
1068 index_t index = va_arg(*ap, index_t);
1069 CLIB_UNUSED(u32 indent) = va_arg(*ap, u32);
1070 ip_adjacency_t * adj = adj_get(index);
1072 s = format (s, "%U", format_vnet_link, adj->ia_link);
1073 s = format (s, " via %U ",
1074 format_ip46_address, &adj->sub_type.nbr.next_hop,
1075 adj_proto_to_46(adj->ia_nh_proto));
1076 s = format (s, "%U",
1077 format_vnet_rewrite,
1078 &adj->rewrite_header, sizeof (adj->rewrite_data), 0);
1084 adj_dpo_lock (dpo_id_t *dpo)
1086 adj_lock(dpo->dpoi_index);
1089 adj_dpo_unlock (dpo_id_t *dpo)
1091 adj_unlock(dpo->dpoi_index);
1097 fib_show_memory_usage("Adjacency",
1098 pool_elts(adj_pool),
1100 sizeof(ip_adjacency_t));
1103 const static dpo_vft_t adj_nbr_dpo_vft = {
1104 .dv_lock = adj_dpo_lock,
1105 .dv_unlock = adj_dpo_unlock,
1106 .dv_format = format_adj_nbr,
1107 .dv_mem_show = adj_mem_show,
1108 .dv_get_urpf = adj_dpo_get_urpf,
1109 .dv_get_mtu = adj_dpo_get_mtu,
1111 const static dpo_vft_t adj_nbr_incompl_dpo_vft = {
1112 .dv_lock = adj_dpo_lock,
1113 .dv_unlock = adj_dpo_unlock,
1114 .dv_format = format_adj_nbr_incomplete,
1115 .dv_get_urpf = adj_dpo_get_urpf,
1116 .dv_get_mtu = adj_dpo_get_mtu,
1120 * @brief The per-protocol VLIB graph nodes that are assigned to an adjacency
1123 * this means that these graph nodes are ones from which a nbr is the
1124 * parent object in the DPO-graph.
1126 const static char* const nbr_ip4_nodes[] =
1131 const static char* const nbr_ip6_nodes[] =
1136 const static char* const nbr_mpls_nodes[] =
1141 const static char* const nbr_ethernet_nodes[] =
1146 const static char* const * const nbr_nodes[DPO_PROTO_NUM] =
1148 [DPO_PROTO_IP4] = nbr_ip4_nodes,
1149 [DPO_PROTO_IP6] = nbr_ip6_nodes,
1150 [DPO_PROTO_MPLS] = nbr_mpls_nodes,
1151 [DPO_PROTO_ETHERNET] = nbr_ethernet_nodes,
1154 const static char* const nbr_incomplete_ip4_nodes[] =
1159 const static char* const nbr_incomplete_ip6_nodes[] =
1161 "ip6-discover-neighbor",
1164 const static char* const nbr_incomplete_mpls_nodes[] =
1166 "mpls-adj-incomplete",
1170 const static char* const * const nbr_incomplete_nodes[DPO_PROTO_NUM] =
1172 [DPO_PROTO_IP4] = nbr_incomplete_ip4_nodes,
1173 [DPO_PROTO_IP6] = nbr_incomplete_ip6_nodes,
1174 [DPO_PROTO_MPLS] = nbr_incomplete_mpls_nodes,
1178 adj_nbr_module_init (void)
1180 dpo_register(DPO_ADJACENCY,
1183 dpo_register(DPO_ADJACENCY_INCOMPLETE,
1184 &adj_nbr_incompl_dpo_vft,
1185 nbr_incomplete_nodes);
1187 ethernet_address_change_ctx_t ctx = {
1188 .function = adj_nbr_ethernet_change_mac,
1189 .function_opaque = 0,
1191 vec_add1 (ethernet_main.address_change_callbacks, ctx);