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 BVT(clib_bihash) **adj_nbr_tables[FIB_PROTOCOL_MAX];
28 // FIXME SIZE APPROPRIATELY. ASK DAVEB.
29 #define ADJ_NBR_DEFAULT_HASH_NUM_BUCKETS (64 * 64)
30 #define ADJ_NBR_DEFAULT_HASH_MEMORY_SIZE (32<<20)
33 #define ADJ_NBR_SET_KEY(_key, _lt, _nh) \
35 _key.key[0] = (_nh)->as_u64[0]; \
36 _key.key[1] = (_nh)->as_u64[1]; \
37 _key.key[2] = (_lt); \
40 #define ADJ_NBR_ITF_OK(_proto, _itf) \
41 (((_itf) < vec_len(adj_nbr_tables[_proto])) && \
42 (NULL != adj_nbr_tables[_proto][sw_if_index]))
45 adj_nbr_insert (fib_protocol_t nh_proto,
46 vnet_link_t link_type,
47 const ip46_address_t *nh_addr,
49 adj_index_t adj_index)
51 BVT(clib_bihash_kv) kv;
53 if (sw_if_index >= vec_len(adj_nbr_tables[nh_proto]))
55 vec_validate(adj_nbr_tables[nh_proto], sw_if_index);
57 if (NULL == adj_nbr_tables[nh_proto][sw_if_index])
59 adj_nbr_tables[nh_proto][sw_if_index] =
60 clib_mem_alloc_aligned(sizeof(BVT(clib_bihash)),
61 CLIB_CACHE_LINE_BYTES);
62 memset(adj_nbr_tables[nh_proto][sw_if_index],
64 sizeof(BVT(clib_bihash)));
66 BV(clib_bihash_init) (adj_nbr_tables[nh_proto][sw_if_index],
67 "Adjacency Neighbour table",
68 ADJ_NBR_DEFAULT_HASH_NUM_BUCKETS,
69 ADJ_NBR_DEFAULT_HASH_MEMORY_SIZE);
72 ADJ_NBR_SET_KEY(kv, link_type, nh_addr);
75 BV(clib_bihash_add_del) (adj_nbr_tables[nh_proto][sw_if_index], &kv, 1);
79 adj_nbr_remove (adj_index_t ai,
80 fib_protocol_t nh_proto,
81 vnet_link_t link_type,
82 const ip46_address_t *nh_addr,
85 BVT(clib_bihash_kv) kv;
87 if (!ADJ_NBR_ITF_OK(nh_proto, sw_if_index))
90 ADJ_NBR_SET_KEY(kv, link_type, nh_addr);
93 BV(clib_bihash_add_del) (adj_nbr_tables[nh_proto][sw_if_index], &kv, 0);
97 adj_nbr_find (fib_protocol_t nh_proto,
98 vnet_link_t link_type,
99 const ip46_address_t *nh_addr,
102 BVT(clib_bihash_kv) kv;
104 ADJ_NBR_SET_KEY(kv, link_type, nh_addr);
106 if (!ADJ_NBR_ITF_OK(nh_proto, sw_if_index))
107 return (ADJ_INDEX_INVALID);
109 if (BV(clib_bihash_search)(adj_nbr_tables[nh_proto][sw_if_index],
112 return (ADJ_INDEX_INVALID);
121 adj_get_nd_node (fib_protocol_t proto)
124 case FIB_PROTOCOL_IP4:
125 return (ip4_arp_node.index);
126 case FIB_PROTOCOL_IP6:
127 return (ip6_discover_neighbor_node.index);
128 case FIB_PROTOCOL_MPLS:
132 return (ip4_arp_node.index);
135 static ip_adjacency_t*
136 adj_nbr_alloc (fib_protocol_t nh_proto,
137 vnet_link_t link_type,
138 const ip46_address_t *nh_addr,
143 adj = adj_alloc(nh_proto);
145 adj_nbr_insert(nh_proto, link_type, nh_addr,
150 * since we just added the ADJ we have no rewrite string for it,
153 adj->lookup_next_index = IP_LOOKUP_NEXT_ARP;
154 adj->sub_type.nbr.next_hop = *nh_addr;
155 adj->ia_link = link_type;
156 adj->ia_nh_proto = nh_proto;
157 adj->rewrite_header.sw_if_index = sw_if_index;
158 memset(&adj->sub_type.midchain.next_dpo, 0,
159 sizeof(adj->sub_type.midchain.next_dpo));
167 * Add an adjacency for the neighbour requested.
169 * The key for an adj is:
170 * - the Next-hops protocol (i.e. v4 or v6)
171 * - the address of the next-hop
172 * - the interface the next-hop is reachable through
175 adj_nbr_add_or_lock (fib_protocol_t nh_proto,
176 vnet_link_t link_type,
177 const ip46_address_t *nh_addr,
180 adj_index_t adj_index;
183 adj_index = adj_nbr_find(nh_proto, link_type, nh_addr, sw_if_index);
185 if (ADJ_INDEX_INVALID == adj_index)
189 vnm = vnet_get_main();
190 adj = adj_nbr_alloc(nh_proto, link_type, nh_addr, sw_if_index);
191 adj_index = adj_get_index(adj);
194 vnet_rewrite_init(vnm, sw_if_index,
195 adj_get_nd_node(nh_proto),
196 vnet_tx_node_index_for_sw_interface(vnm, sw_if_index),
197 &adj->rewrite_header);
200 * we need a rewrite where the destination IP address is converted
201 * to the appropriate link-layer address. This is interface specific.
202 * So ask the interface to do it.
204 vnet_update_adjacency_for_sw_interface(vnm, sw_if_index, adj_index);
215 adj_nbr_add_or_lock_w_rewrite (fib_protocol_t nh_proto,
216 vnet_link_t link_type,
217 const ip46_address_t *nh_addr,
221 adj_index_t adj_index;
224 adj_index = adj_nbr_find(nh_proto, link_type, nh_addr, sw_if_index);
226 if (ADJ_INDEX_INVALID == adj_index)
228 adj = adj_nbr_alloc(nh_proto, link_type, nh_addr, sw_if_index);
229 adj->rewrite_header.sw_if_index = sw_if_index;
233 adj = adj_get(adj_index);
236 adj_lock(adj_get_index(adj));
237 adj_nbr_update_rewrite(adj_get_index(adj),
238 ADJ_NBR_REWRITE_FLAG_COMPLETE,
241 return (adj_get_index(adj));
245 * adj_nbr_update_rewrite
247 * Update the adjacency's rewrite string. A NULL string implies the
248 * rewirte is reset (i.e. when ARP/ND etnry is gone).
249 * NB: the adj being updated may be handling traffic in the DP.
252 adj_nbr_update_rewrite (adj_index_t adj_index,
253 adj_nbr_rewrite_flag_t flags,
258 ASSERT(ADJ_INDEX_INVALID != adj_index);
260 adj = adj_get(adj_index);
262 if (flags & ADJ_NBR_REWRITE_FLAG_COMPLETE)
265 * update the adj's rewrite string and build the arc
266 * from the rewrite node to the interface's TX node
268 adj_nbr_update_rewrite_internal(adj, IP_LOOKUP_NEXT_REWRITE,
269 adj_get_rewrite_node(adj->ia_link),
270 vnet_tx_node_index_for_sw_interface(
272 adj->rewrite_header.sw_if_index),
277 adj_nbr_update_rewrite_internal(adj, IP_LOOKUP_NEXT_ARP,
278 adj_get_nd_node(adj->ia_nh_proto),
279 vnet_tx_node_index_for_sw_interface(
281 adj->rewrite_header.sw_if_index),
287 * adj_nbr_update_rewrite_internal
289 * Update the adjacency's rewrite string. A NULL string implies the
290 * rewirte is reset (i.e. when ARP/ND etnry is gone).
291 * NB: the adj being updated may be handling traffic in the DP.
294 adj_nbr_update_rewrite_internal (ip_adjacency_t *adj,
304 vm = vlib_get_main();
305 old_next = adj->lookup_next_index;
307 walk_ai = adj_get_index(adj);
308 if (VNET_LINK_MPLS == adj->ia_link)
311 * The link type MPLS has no children in the control plane graph, it only
312 * has children in the data-palne graph. The backwalk is up the former.
313 * So we need to walk from its IP cousin.
315 walk_ai = adj_nbr_find(adj->ia_nh_proto,
316 fib_proto_to_link(adj->ia_nh_proto),
317 &adj->sub_type.nbr.next_hop,
318 adj->rewrite_header.sw_if_index);
322 * Updating a rewrite string is not atomic;
323 * - the rewrite string is too long to write in one instruction
324 * - when swapping from incomplete to complete, we also need to update
325 * the VLIB graph next-index of the adj.
326 * ideally we would only want to suspend forwarding via this adj whilst we
327 * do this, but we do not have that level of granularity - it's suspend all
328 * worker threads or nothing.
329 * The other chioces are:
330 * - to mark the adj down and back walk so child load-balances drop this adj
332 * - update the next_node index of this adj to point to error-drop
333 * both of which will mean for MAC change we will drop for this adj
334 * which is not acceptable. However, when the adj changes type (from
335 * complete to incomplete and vice-versa) the child DPOs, which have the
336 * VLIB graph next node index, will be sending packets to the wrong graph
337 * node. So from the options above, updating the next_node of the adj to
338 * be drop will work, but it relies on each graph node v4/v6/mpls, rewrite/
339 * arp/midchain always be valid w.r.t. a mis-match of adj type and node type
340 * (i.e. a rewrite adj in the arp node). This is not enforcable. Getting it
341 * wrong will lead to hard to find bugs since its a race condition. So we
342 * choose the more reliable method of updating the children to use the drop,
343 * then switching adj's type, then updating the children again. Did I mention
344 * that this doesn't happen often...
345 * So we need to distinguish between the two cases:
347 * 2 - adj type change
349 if (old_next != adj_next_index &&
350 ADJ_INDEX_INVALID != walk_ai)
353 * the adj is changing type. we need to fix all children so that they
354 * stack momentarily on a drop, while the adj changes. If we don't do
355 * this the children will send packets to a VLIB graph node that does
356 * not correspond to the adj's type - and it goes downhill from there.
358 fib_node_back_walk_ctx_t bw_ctx = {
359 .fnbw_reason = FIB_NODE_BW_REASON_FLAG_ADJ_DOWN,
361 * force this walk to be synchrous. if we don't and a node in the graph
362 * (a heavily shared path-list) chooses to back-ground the walk (make it
363 * async) then it will pause and we will do the adj update below, before
364 * all the children are updated. not good.
366 .fnbw_flags = FIB_NODE_BW_FLAG_FORCE_SYNC,
369 fib_walk_sync(FIB_NODE_TYPE_ADJ, walk_ai, &bw_ctx);
373 * If we are just updating the MAC string of the adj (which we also can't
374 * do atomically), then we need to stop packets switching through the adj.
375 * We can't do that on a per-adj basis, so it's all the packets.
376 * If we are updating the type, and we walked back to the children above,
377 * then this barrier serves to flush the queues/frames.
379 vlib_worker_thread_barrier_sync(vm);
381 adj->lookup_next_index = adj_next_index;
386 * new rewrite provided.
387 * fill in the adj's rewrite string, and build the VLIB graph arc.
389 vnet_rewrite_set_data_internal(&adj->rewrite_header,
390 sizeof(adj->rewrite_data),
397 vnet_rewrite_clear_data_internal(&adj->rewrite_header,
398 sizeof(adj->rewrite_data));
400 adj->rewrite_header.node_index = this_node;
401 adj->rewrite_header.next_index = vlib_node_add_next(vlib_get_main(),
406 * done with the rewirte update - let the workers loose.
408 vlib_worker_thread_barrier_release(vm);
410 if (old_next != adj->lookup_next_index &&
411 ADJ_INDEX_INVALID != walk_ai)
414 * backwalk to the children so they can stack on the now updated
417 fib_node_back_walk_ctx_t bw_ctx = {
418 .fnbw_reason = FIB_NODE_BW_REASON_FLAG_ADJ_UPDATE,
421 fib_walk_sync(FIB_NODE_TYPE_ADJ, walk_ai, &bw_ctx);
425 typedef struct adj_db_count_ctx_t_ {
427 } adj_db_count_ctx_t;
430 adj_db_count (BVT(clib_bihash_kv) * kvp,
433 adj_db_count_ctx_t * ctx = arg;
438 adj_nbr_db_size (void)
440 adj_db_count_ctx_t ctx = {
443 fib_protocol_t proto;
446 for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++)
448 vec_foreach_index(sw_if_index, adj_nbr_tables[proto])
450 if (NULL != adj_nbr_tables[proto][sw_if_index])
452 BV(clib_bihash_foreach_key_value_pair) (
453 adj_nbr_tables[proto][sw_if_index],
463 * @brief Context for a walk of the adjacency neighbour DB
465 typedef struct adj_walk_ctx_t_
467 adj_walk_cb_t awc_cb;
472 adj_nbr_walk_cb (BVT(clib_bihash_kv) * kvp,
475 adj_walk_ctx_t *ctx = arg;
477 // FIXME: can't stop early...
478 ctx->awc_cb(kvp->value, ctx->awc_ctx);
482 adj_nbr_walk (u32 sw_if_index,
483 fib_protocol_t adj_nh_proto,
487 if (!ADJ_NBR_ITF_OK(adj_nh_proto, sw_if_index))
490 adj_walk_ctx_t awc = {
495 BV(clib_bihash_foreach_key_value_pair) (
496 adj_nbr_tables[adj_nh_proto][sw_if_index],
502 * @brief Context for a walk of the adjacency neighbour DB
504 typedef struct adj_walk_nh_ctx_t_
506 adj_walk_cb_t awc_cb;
508 const ip46_address_t *awc_nh;
512 adj_nbr_walk_nh_cb (BVT(clib_bihash_kv) * kvp,
516 adj_walk_nh_ctx_t *ctx = arg;
518 adj = adj_get(kvp->value);
520 if (!ip46_address_cmp(&adj->sub_type.nbr.next_hop, ctx->awc_nh))
521 ctx->awc_cb(kvp->value, ctx->awc_ctx);
525 * @brief Walk adjacencies on a link with a given v4 next-hop.
526 * that is visit the adjacencies with different link types.
529 adj_nbr_walk_nh4 (u32 sw_if_index,
530 const ip4_address_t *addr,
534 if (!ADJ_NBR_ITF_OK(FIB_PROTOCOL_IP4, sw_if_index))
537 ip46_address_t nh = {
541 adj_walk_nh_ctx_t awc = {
547 BV(clib_bihash_foreach_key_value_pair) (
548 adj_nbr_tables[FIB_PROTOCOL_IP4][sw_if_index],
554 * @brief Walk adjacencies on a link with a given v6 next-hop.
555 * that is visit the adjacencies with different link types.
558 adj_nbr_walk_nh6 (u32 sw_if_index,
559 const ip6_address_t *addr,
563 if (!ADJ_NBR_ITF_OK(FIB_PROTOCOL_IP6, sw_if_index))
566 ip46_address_t nh = {
570 adj_walk_nh_ctx_t awc = {
576 BV(clib_bihash_foreach_key_value_pair) (
577 adj_nbr_tables[FIB_PROTOCOL_IP6][sw_if_index],
583 * @brief Walk adjacencies on a link with a given next-hop.
584 * that is visit the adjacencies with different link types.
587 adj_nbr_walk_nh (u32 sw_if_index,
588 fib_protocol_t adj_nh_proto,
589 const ip46_address_t *nh,
593 if (!ADJ_NBR_ITF_OK(adj_nh_proto, sw_if_index))
596 adj_walk_nh_ctx_t awc = {
602 BV(clib_bihash_foreach_key_value_pair) (
603 adj_nbr_tables[adj_nh_proto][sw_if_index],
609 * Flags associated with the interface state walks
611 typedef enum adj_nbr_interface_flags_t_
613 ADJ_NBR_INTERFACE_UP = (1 << 0),
614 } adj_nbr_interface_flags_t;
617 * Context for the state change walk of the DB
619 typedef struct adj_nbr_interface_state_change_ctx_t_
622 * Flags on the interface
624 adj_nbr_interface_flags_t flags;
625 } adj_nbr_interface_state_change_ctx_t;
628 adj_nbr_interface_state_change_one (adj_index_t ai,
632 * Back walk the graph to inform the forwarding entries
633 * that this interface state has changed. Do this synchronously
634 * since this is the walk that provides convergence
636 adj_nbr_interface_state_change_ctx_t *ctx = arg;
638 fib_node_back_walk_ctx_t bw_ctx = {
639 .fnbw_reason = ((ctx->flags & ADJ_NBR_INTERFACE_UP) ?
640 FIB_NODE_BW_REASON_FLAG_INTERFACE_UP :
641 FIB_NODE_BW_REASON_FLAG_INTERFACE_DOWN),
643 * the force sync applies only as far as the first fib_entry.
644 * And it's the fib_entry's we need to converge away from
645 * the adjacencies on the now down link
647 .fnbw_flags = (!(ctx->flags & ADJ_NBR_INTERFACE_UP) ?
648 FIB_NODE_BW_FLAG_FORCE_SYNC :
652 fib_walk_sync(FIB_NODE_TYPE_ADJ, ai, &bw_ctx);
654 return (ADJ_WALK_RC_CONTINUE);
658 * @brief Registered function for SW interface state changes
660 static clib_error_t *
661 adj_nbr_sw_interface_state_change (vnet_main_t * vnm,
665 fib_protocol_t proto;
668 * walk each adj on the interface and trigger a walk from that adj
670 for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++)
672 adj_nbr_interface_state_change_ctx_t ctx = {
673 .flags = ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ?
674 ADJ_NBR_INTERFACE_UP :
678 adj_nbr_walk(sw_if_index, proto,
679 adj_nbr_interface_state_change_one,
686 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION_PRIO(
687 adj_nbr_sw_interface_state_change,
688 VNET_ITF_FUNC_PRIORITY_HIGH);
691 * @brief Invoked on each SW interface of a HW interface when the
692 * HW interface state changes
695 adj_nbr_hw_sw_interface_state_change (vnet_main_t * vnm,
699 adj_nbr_interface_state_change_ctx_t *ctx = arg;
700 fib_protocol_t proto;
703 * walk each adj on the interface and trigger a walk from that adj
705 for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++)
707 adj_nbr_walk(sw_if_index, proto,
708 adj_nbr_interface_state_change_one,
714 * @brief Registered callback for HW interface state changes
716 static clib_error_t *
717 adj_nbr_hw_interface_state_change (vnet_main_t * vnm,
722 * walk SW interface on the HW
724 adj_nbr_interface_state_change_ctx_t ctx = {
725 .flags = ((flags & VNET_HW_INTERFACE_FLAG_LINK_UP) ?
726 ADJ_NBR_INTERFACE_UP :
730 vnet_hw_interface_walk_sw(vnm, hw_if_index,
731 adj_nbr_hw_sw_interface_state_change,
737 VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION_PRIO(
738 adj_nbr_hw_interface_state_change,
739 VNET_ITF_FUNC_PRIORITY_HIGH);
742 adj_nbr_interface_delete_one (adj_index_t ai,
746 * Back walk the graph to inform the forwarding entries
747 * that this interface has been deleted.
749 fib_node_back_walk_ctx_t bw_ctx = {
750 .fnbw_reason = FIB_NODE_BW_REASON_FLAG_INTERFACE_DELETE,
753 fib_walk_sync(FIB_NODE_TYPE_ADJ, ai, &bw_ctx);
755 return (ADJ_WALK_RC_CONTINUE);
759 * adj_nbr_interface_add_del
761 * Registered to receive interface Add and delete notifications
763 static clib_error_t *
764 adj_nbr_interface_add_del (vnet_main_t * vnm,
768 fib_protocol_t proto;
773 * not interested in interface additions. we will not back walk
774 * to resolve paths through newly added interfaces. Why? The control
775 * plane should have the brains to add interfaces first, then routes.
776 * So the case where there are paths with a interface that matches
777 * one just created is the case where the path resolved through an
778 * interface that was deleted, and still has not been removed. The
779 * new interface added, is NO GUARANTEE that the interface being
780 * added now, even though it may have the same sw_if_index, is the
781 * same interface that the path needs. So tough!
782 * If the control plane wants these routes to resolve it needs to
783 * remove and add them again.
788 for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++)
790 adj_nbr_walk(sw_if_index, proto,
791 adj_nbr_interface_delete_one,
799 VNET_SW_INTERFACE_ADD_DEL_FUNCTION(adj_nbr_interface_add_del);
803 adj_nbr_show_one (adj_index_t ai,
806 vlib_cli_output (arg, "[@%d] %U",
808 format_ip_adjacency, ai,
809 FORMAT_IP_ADJACENCY_NONE);
811 return (ADJ_WALK_RC_CONTINUE);
814 static clib_error_t *
815 adj_nbr_show (vlib_main_t * vm,
816 unformat_input_t * input,
817 vlib_cli_command_t * cmd)
819 adj_index_t ai = ADJ_INDEX_INVALID;
820 u32 sw_if_index = ~0;
822 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
824 if (unformat (input, "%d", &ai))
826 else if (unformat (input, "%U",
827 unformat_vnet_sw_interface, vnet_get_main(),
834 if (ADJ_INDEX_INVALID != ai)
836 vlib_cli_output (vm, "[@%d] %U",
838 format_ip_adjacency, ai,
839 FORMAT_IP_ADJACENCY_DETAIL);
841 else if (~0 != sw_if_index)
843 fib_protocol_t proto;
845 for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++)
847 adj_nbr_walk(sw_if_index, proto,
854 fib_protocol_t proto;
856 for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++)
858 vec_foreach_index(sw_if_index, adj_nbr_tables[proto])
860 adj_nbr_walk(sw_if_index, proto,
871 * Show all neighbour adjacencies.
873 * @cliexstart{sh adj nbr}
874 * [@2] ipv4 via 1.0.0.2 loop0: IP4: 00:00:22:aa:bb:cc -> 00:00:11:aa:bb:cc
875 * [@3] mpls via 1.0.0.2 loop0: MPLS_UNICAST: 00:00:22:aa:bb:cc -> 00:00:11:aa:bb:cc
876 * [@4] ipv4 via 1.0.0.3 loop0: IP4: 00:00:22:aa:bb:cc -> 00:00:11:aa:bb:cc
877 * [@5] mpls via 1.0.0.3 loop0: MPLS_UNICAST: 00:00:22:aa:bb:cc -> 00:00:11:aa:bb:cc
880 VLIB_CLI_COMMAND (ip4_show_fib_command, static) = {
881 .path = "show adj nbr",
882 .short_help = "show adj nbr [<adj_index>] [interface]",
883 .function = adj_nbr_show,
887 adj_proto_to_46 (fib_protocol_t proto)
891 case FIB_PROTOCOL_IP4:
892 return (IP46_TYPE_IP4);
893 case FIB_PROTOCOL_IP6:
894 return (IP46_TYPE_IP6);
896 return (IP46_TYPE_IP4);
898 return (IP46_TYPE_IP4);
902 format_adj_nbr_incomplete (u8* s, va_list *ap)
904 index_t index = va_arg(*ap, index_t);
905 CLIB_UNUSED(u32 indent) = va_arg(*ap, u32);
906 vnet_main_t * vnm = vnet_get_main();
907 ip_adjacency_t * adj = adj_get(index);
909 s = format (s, "arp-%U", format_vnet_link, adj->ia_link);
910 s = format (s, ": via %U",
911 format_ip46_address, &adj->sub_type.nbr.next_hop,
912 adj_proto_to_46(adj->ia_nh_proto));
913 s = format (s, " %U",
914 format_vnet_sw_interface_name,
916 vnet_get_sw_interface(vnm,
917 adj->rewrite_header.sw_if_index));
923 format_adj_nbr (u8* s, va_list *ap)
925 index_t index = va_arg(*ap, index_t);
926 CLIB_UNUSED(u32 indent) = va_arg(*ap, u32);
927 vnet_main_t * vnm = vnet_get_main();
928 ip_adjacency_t * adj = adj_get(index);
930 s = format (s, "%U", format_vnet_link, adj->ia_link);
931 s = format (s, " via %U ",
932 format_ip46_address, &adj->sub_type.nbr.next_hop,
933 adj_proto_to_46(adj->ia_nh_proto));
936 vnm->vlib_main, &adj->rewrite_header, sizeof (adj->rewrite_data), 0);
942 adj_dpo_lock (dpo_id_t *dpo)
944 adj_lock(dpo->dpoi_index);
947 adj_dpo_unlock (dpo_id_t *dpo)
949 adj_unlock(dpo->dpoi_index);
955 fib_show_memory_usage("Adjacency",
958 sizeof(ip_adjacency_t));
961 const static dpo_vft_t adj_nbr_dpo_vft = {
962 .dv_lock = adj_dpo_lock,
963 .dv_unlock = adj_dpo_unlock,
964 .dv_format = format_adj_nbr,
965 .dv_mem_show = adj_mem_show,
967 const static dpo_vft_t adj_nbr_incompl_dpo_vft = {
968 .dv_lock = adj_dpo_lock,
969 .dv_unlock = adj_dpo_unlock,
970 .dv_format = format_adj_nbr_incomplete,
974 * @brief The per-protocol VLIB graph nodes that are assigned to an adjacency
977 * this means that these graph nodes are ones from which a nbr is the
978 * parent object in the DPO-graph.
980 const static char* const nbr_ip4_nodes[] =
982 "ip4-rewrite-transit",
985 const static char* const nbr_ip6_nodes[] =
990 const static char* const nbr_mpls_nodes[] =
995 const static char* const nbr_ethernet_nodes[] =
1000 const static char* const * const nbr_nodes[DPO_PROTO_NUM] =
1002 [DPO_PROTO_IP4] = nbr_ip4_nodes,
1003 [DPO_PROTO_IP6] = nbr_ip6_nodes,
1004 [DPO_PROTO_MPLS] = nbr_mpls_nodes,
1005 [DPO_PROTO_ETHERNET] = nbr_ethernet_nodes,
1008 const static char* const nbr_incomplete_ip4_nodes[] =
1013 const static char* const nbr_incomplete_ip6_nodes[] =
1015 "ip6-discover-neighbor",
1018 const static char* const nbr_incomplete_mpls_nodes[] =
1020 "mpls-adj-incomplete",
1024 const static char* const * const nbr_incomplete_nodes[DPO_PROTO_NUM] =
1026 [DPO_PROTO_IP4] = nbr_incomplete_ip4_nodes,
1027 [DPO_PROTO_IP6] = nbr_incomplete_ip6_nodes,
1028 [DPO_PROTO_MPLS] = nbr_incomplete_mpls_nodes,
1032 adj_nbr_module_init (void)
1034 dpo_register(DPO_ADJACENCY,
1037 dpo_register(DPO_ADJACENCY_INCOMPLETE,
1038 &adj_nbr_incompl_dpo_vft,
1039 nbr_incomplete_nodes);