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.h>
17 #include <vnet/dpo/load_balance.h>
18 #include <vnet/dpo/mpls_label_dpo.h>
19 #include <vnet/dpo/drop_dpo.h>
20 #include <vnet/dpo/replicate_dpo.h>
22 #include <vnet/fib/fib_entry_src.h>
23 #include <vnet/fib/fib_table.h>
24 #include <vnet/fib/fib_path_ext.h>
25 #include <vnet/fib/fib_urpf_list.h>
26 #include <vnet/fib/fib_entry_delegate.h>
31 static fib_entry_src_vft_t fib_entry_src_bh_vft[FIB_SOURCE_BH_MAX];
34 * Get the VFT for a given source. This is a combination of the source
35 * enum and the interposer flags
37 const fib_entry_src_vft_t*
38 fib_entry_src_get_vft (const fib_entry_src_t *esrc)
40 fib_source_behaviour_t bh;
42 bh = fib_source_get_behaviour(esrc->fes_src);
44 if (esrc->fes_entry_flags & FIB_ENTRY_FLAG_INTERPOSE)
46 return (&fib_entry_src_bh_vft[FIB_SOURCE_BH_INTERPOSE]);
49 ASSERT(bh < FIB_SOURCE_BH_MAX);
50 return (&fib_entry_src_bh_vft[bh]);
54 fib_entry_src_copy_default (const fib_entry_src_t *orig_src,
55 const fib_entry_t *fib_entry,
56 fib_entry_src_t *copy_src)
58 clib_memcpy(©_src->u, &orig_src->u, sizeof(copy_src->u));
62 fib_entry_src_behaviour_register (fib_source_behaviour_t bh,
63 const fib_entry_src_vft_t *vft)
65 fib_entry_src_bh_vft[bh] = *vft;
67 if (NULL == fib_entry_src_bh_vft[bh].fesv_copy)
69 fib_entry_src_bh_vft[bh].fesv_copy = fib_entry_src_copy_default;
74 fib_entry_src_cmp_for_sort (void * v1,
77 fib_entry_src_t *esrc1 = v1, *esrc2 = v2;
79 return (fib_source_get_prio(esrc1->fes_src) -
80 fib_source_get_prio(esrc2->fes_src));
84 fib_entry_src_action_init (fib_entry_t *fib_entry,
86 fib_entry_flag_t flags)
88 fib_entry_src_t esrc = {
89 .fes_pl = FIB_NODE_INDEX_INVALID,
90 .fes_flags = FIB_ENTRY_SRC_FLAG_NONE,
92 .fes_entry_flags = flags,
95 FIB_ENTRY_SRC_VFT_INVOKE(fib_entry, &esrc, fesv_init, (&esrc));
97 vec_add1(fib_entry->fe_srcs, esrc);
98 vec_sort_with_function(fib_entry->fe_srcs,
99 fib_entry_src_cmp_for_sort);
102 static fib_entry_src_t *
103 fib_entry_src_find_i (const fib_entry_t *fib_entry,
108 fib_entry_src_t *esrc;
112 vec_foreach(esrc, fib_entry->fe_srcs)
114 if (esrc->fes_src == source)
132 fib_entry_src_find (const fib_entry_t *fib_entry,
136 return (fib_entry_src_find_i(fib_entry, source, NULL));
140 fib_entry_is_sourced (fib_node_index_t fib_entry_index,
143 fib_entry_t *fib_entry;
145 fib_entry = fib_entry_get(fib_entry_index);
147 return (NULL != fib_entry_src_find(fib_entry, source));
151 fib_entry_is_marked (fib_node_index_t fib_entry_index,
154 fib_entry_t *fib_entry;
155 fib_entry_src_t *esrc;
157 fib_entry = fib_entry_get(fib_entry_index);
159 esrc = fib_entry_src_find(fib_entry, source);
167 return (!!(esrc->fes_flags & FIB_ENTRY_SRC_FLAG_STALE));
172 fib_entry_mark (fib_node_index_t fib_entry_index,
175 fib_entry_t *fib_entry;
176 fib_entry_src_t *esrc;
178 fib_entry = fib_entry_get(fib_entry_index);
180 esrc = fib_entry_src_find(fib_entry, source);
184 esrc->fes_flags |= FIB_ENTRY_SRC_FLAG_STALE;
188 static fib_entry_src_t *
189 fib_entry_src_find_or_create (fib_entry_t *fib_entry,
191 fib_entry_flag_t flags)
193 fib_entry_src_t *esrc;
195 esrc = fib_entry_src_find(fib_entry, source);
199 fib_entry_src_action_init(fib_entry, source, flags);
202 return (fib_entry_src_find(fib_entry, source));
206 fib_entry_src_action_deinit (fib_entry_t *fib_entry,
210 fib_entry_src_t *esrc;
213 esrc = fib_entry_src_find_i(fib_entry, source, &index);
215 ASSERT(NULL != esrc);
217 FIB_ENTRY_SRC_VFT_INVOKE(fib_entry, esrc, fesv_deinit, (esrc));
219 fib_path_ext_list_flush(&esrc->fes_path_exts);
220 vec_del1(fib_entry->fe_srcs, index);
221 vec_sort_with_function(fib_entry->fe_srcs,
222 fib_entry_src_cmp_for_sort);
225 fib_entry_src_cover_res_t
226 fib_entry_src_action_cover_change (fib_entry_t *fib_entry,
227 fib_entry_src_t *esrc)
229 FIB_ENTRY_SRC_VFT_INVOKE_AND_RETURN(esrc, fesv_cover_change,
232 fib_entry_src_cover_res_t res = {
234 .bw_reason = FIB_NODE_BW_REASON_FLAG_NONE,
239 fib_entry_src_cover_res_t
240 fib_entry_src_action_cover_update (fib_entry_t *fib_entry,
241 fib_entry_src_t *esrc)
243 FIB_ENTRY_SRC_VFT_INVOKE_AND_RETURN(esrc, fesv_cover_update,
246 fib_entry_src_cover_res_t res = {
248 .bw_reason = FIB_NODE_BW_REASON_FLAG_NONE,
253 typedef struct fib_entry_src_collect_forwarding_ctx_t_
255 load_balance_path_t *next_hops;
256 const fib_entry_t *fib_entry;
257 i32 start_source_index, end_source_index;
258 fib_forward_chain_type_t fct;
259 int n_recursive_constrained;
261 dpo_proto_t payload_proto;
262 } fib_entry_src_collect_forwarding_ctx_t;
265 * @brief Determine whether this FIB entry should use a load-balance MAP
266 * to support PIC edge fast convergence
268 static load_balance_flags_t
269 fib_entry_calc_lb_flags (fib_entry_src_collect_forwarding_ctx_t *ctx,
270 const fib_entry_src_t *esrc)
273 * We'll use a LB map if the path-list has multiple recursive paths.
274 * recursive paths implies BGP, and hence scale.
276 if (ctx->n_recursive_constrained > 1 &&
277 fib_path_list_is_popular(esrc->fes_pl))
279 return (LOAD_BALANCE_FLAG_USES_MAP);
281 return (LOAD_BALANCE_FLAG_NONE);
285 fib_entry_src_valid_out_label (mpls_label_t label)
287 return ((MPLS_LABEL_IS_REAL(label) ||
288 MPLS_LABEL_POP == label ||
289 MPLS_IETF_IPV4_EXPLICIT_NULL_LABEL == label ||
290 MPLS_IETF_IPV6_EXPLICIT_NULL_LABEL == label ||
291 MPLS_IETF_IMPLICIT_NULL_LABEL == label));
295 fib_prefix_get_payload_proto (const fib_prefix_t *pfx)
297 switch (pfx->fp_proto)
299 case FIB_PROTOCOL_IP4:
300 return (DPO_PROTO_IP4);
301 case FIB_PROTOCOL_IP6:
302 return (DPO_PROTO_IP6);
303 case FIB_PROTOCOL_MPLS:
304 return (pfx->fp_payload_proto);
308 return (DPO_PROTO_IP4);
312 fib_entry_src_get_path_forwarding (fib_node_index_t path_index,
313 fib_entry_src_collect_forwarding_ctx_t *ctx)
315 load_balance_path_t *nh;
318 * no extension => no out-going label for this path. that's OK
319 * in the case of an IP or EOS chain, but not for non-EOS
323 case FIB_FORW_CHAIN_TYPE_UNICAST_IP4:
324 case FIB_FORW_CHAIN_TYPE_UNICAST_IP6:
325 case FIB_FORW_CHAIN_TYPE_MCAST_IP4:
326 case FIB_FORW_CHAIN_TYPE_MCAST_IP6:
327 case FIB_FORW_CHAIN_TYPE_BIER:
329 * EOS traffic with no label to stack, we need the IP Adj
331 vec_add2(ctx->next_hops, nh, 1);
333 nh->path_index = path_index;
334 nh->path_weight = fib_path_get_weight(path_index);
335 fib_path_contribute_forwarding(path_index, ctx->fct,
336 ctx->payload_proto, &nh->path_dpo);
339 case FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS:
340 if (fib_path_is_exclusive(path_index) ||
341 fib_path_is_deag(path_index))
343 vec_add2(ctx->next_hops, nh, 1);
345 nh->path_index = path_index;
346 nh->path_weight = fib_path_get_weight(path_index);
347 fib_path_contribute_forwarding(path_index,
348 FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
353 case FIB_FORW_CHAIN_TYPE_MPLS_EOS:
356 * no label. we need a chain based on the payload. fixup.
358 vec_add2(ctx->next_hops, nh, 1);
360 nh->path_index = path_index;
361 nh->path_weight = fib_path_get_weight(path_index);
362 fib_path_contribute_forwarding(path_index,
366 fib_path_stack_mpls_disp(path_index,
368 FIB_MPLS_LSP_MODE_PIPE,
373 case FIB_FORW_CHAIN_TYPE_ETHERNET:
374 case FIB_FORW_CHAIN_TYPE_NSH:
380 static fib_path_list_walk_rc_t
381 fib_entry_src_collect_forwarding (fib_node_index_t pl_index,
382 fib_node_index_t path_index,
385 fib_entry_src_collect_forwarding_ctx_t *ctx;
386 const fib_entry_src_t *esrc;
387 fib_path_ext_t *path_ext;
391 n_nhs = vec_len(ctx->next_hops);
394 * walk the paths and extension of the best non-interpose source
396 esrc = &ctx->fib_entry->fe_srcs[ctx->end_source_index];
399 * if the path is not resolved, don't include it.
401 if (!fib_path_is_resolved(path_index))
403 return (FIB_PATH_LIST_WALK_CONTINUE);
406 if (fib_path_is_recursive_constrained(path_index))
408 ctx->n_recursive_constrained += 1;
410 if (0xffff == ctx->preference)
413 * not set a preference yet, so the first path we encounter
414 * sets the preference we are collecting.
416 ctx->preference = fib_path_get_preference(path_index);
418 else if (ctx->preference != fib_path_get_preference(path_index))
421 * this path does not belong to the same preference as the
422 * previous paths encountered. we are done now.
424 return (FIB_PATH_LIST_WALK_STOP);
428 * get the matching path-extension for the path being visited.
430 path_ext = fib_path_ext_list_find_by_path_index(&esrc->fes_path_exts,
433 if (NULL != path_ext)
435 switch (path_ext->fpe_type)
437 case FIB_PATH_EXT_MPLS:
438 if (fib_entry_src_valid_out_label(path_ext->fpe_label_stack[0].fml_value))
441 * found a matching extension. stack it to obtain the forwarding
442 * info for this path.
445 fib_path_ext_stack(path_ext,
452 fib_entry_src_get_path_forwarding(path_index, ctx);
455 case FIB_PATH_EXT_ADJ:
456 if (FIB_PATH_EXT_ADJ_FLAG_REFINES_COVER & path_ext->fpe_adj_flags)
458 fib_entry_src_get_path_forwarding(path_index, ctx);
462 * the path does not refine the cover, meaning that
463 * the adjacency does/does not match the sub-net on the link.
464 * So this path does not contribute forwarding.
471 fib_entry_src_get_path_forwarding(path_index, ctx);
475 * a this point 'ctx' has the DPO the path contributed, plus
476 * any labels from path extensions.
477 * check if there are any interpose sources that want to contribute
479 if (n_nhs < vec_len(ctx->next_hops))
482 * the path contributed a new choice.
484 const fib_entry_src_vft_t *vft;
487 * roll up the sources that are interposes
491 for (index = ctx->end_source_index;
492 index >= ctx->start_source_index;
495 const dpo_id_t *interposer;
497 esrc = &ctx->fib_entry->fe_srcs[index];
498 vft = fib_entry_src_get_vft(esrc);
500 if (!(esrc->fes_flags & FIB_ENTRY_SRC_FLAG_CONTRIBUTING) ||
501 !(esrc->fes_entry_flags & FIB_ENTRY_FLAG_INTERPOSE))
504 ASSERT(vft->fesv_contribute_interpose);
505 interposer = vft->fesv_contribute_interpose(esrc, ctx->fib_entry);
507 if (NULL != interposer)
509 dpo_id_t clone = DPO_INVALID;
511 dpo_mk_interpose(interposer,
512 &ctx->next_hops[n_nhs].path_dpo,
515 dpo_copy(&ctx->next_hops[n_nhs].path_dpo, &clone);
521 return (FIB_PATH_LIST_WALK_CONTINUE);
525 fib_entry_src_mk_lb (fib_entry_t *fib_entry,
527 fib_forward_chain_type_t fct,
530 const fib_entry_src_t *esrc;
531 dpo_proto_t lb_proto;
535 * The source passed here is the 'best', i.e. the one the client
536 * wants. however, if it's an interpose then it does not contribute
537 * the forwarding, the next best source that is not an interpose does.
538 * So roll down the sources, to find the best non-interpose
540 vec_foreach_index (start, fib_entry->fe_srcs)
542 if (source == fib_entry->fe_srcs[start].fes_src)
545 for (end = start; end < vec_len (fib_entry->fe_srcs); end++)
547 if (!(fib_entry->fe_srcs[end].fes_entry_flags &
548 FIB_ENTRY_FLAG_INTERPOSE) &&
549 (fib_entry->fe_srcs[end].fes_flags &
550 FIB_ENTRY_SRC_FLAG_CONTRIBUTING))
553 if (end == vec_len(fib_entry->fe_srcs))
555 /* didn't find any contributing non-interpose sources */
559 esrc = &fib_entry->fe_srcs[end];
562 * If the entry has path extensions then we construct a load-balance
563 * by stacking the extensions on the forwarding chains of the paths.
564 * Otherwise we use the load-balance of the path-list
566 fib_entry_src_collect_forwarding_ctx_t ctx = {
567 .fib_entry = fib_entry,
569 .n_recursive_constrained = 0,
571 .preference = 0xffff,
572 .start_source_index = start,
573 .end_source_index = end,
574 .payload_proto = fib_prefix_get_payload_proto(&fib_entry->fe_prefix),
578 * As an optimisation we allocate the vector of next-hops to be sized
579 * equal to the maximum number of paths we will need, which is also the
580 * most likely number we will need, since in most cases the paths are 'up'.
582 vec_validate(ctx.next_hops, fib_path_list_get_n_paths(esrc->fes_pl));
583 vec_reset_length(ctx.next_hops);
585 lb_proto = fib_forw_chain_type_to_dpo_proto(fct);
587 fib_path_list_walk(esrc->fes_pl,
588 fib_entry_src_collect_forwarding,
591 if (esrc->fes_entry_flags & FIB_ENTRY_FLAG_EXCLUSIVE)
594 * the client provided the DPO that the entry should link to.
595 * all entries must link to a LB, so if it is an LB already
596 * then we can use it.
598 if ((1 == vec_len(ctx.next_hops)) &&
599 (DPO_LOAD_BALANCE == ctx.next_hops[0].path_dpo.dpoi_type))
601 dpo_copy(dpo_lb, &ctx.next_hops[0].path_dpo);
602 dpo_reset(&ctx.next_hops[0].path_dpo);
607 if (!dpo_id_is_valid(dpo_lb))
612 if (esrc->fes_entry_flags & FIB_ENTRY_FLAG_MULTICAST)
617 MPLS_IS_REPLICATE | replicate_create(0, lb_proto));
621 fib_protocol_t flow_hash_proto;
622 flow_hash_config_t fhc;
625 * if the protocol for the LB we are building does not match that
626 * of the fib_entry (i.e. we are build the [n]EOS LB for an IPv[46]
627 * then the fib_index is not an index that relates to the table
628 * type we need. So get the default flow-hash config instead.
630 flow_hash_proto = dpo_proto_to_fib(lb_proto);
631 if (fib_entry->fe_prefix.fp_proto != flow_hash_proto)
633 fhc = fib_table_get_default_flow_hash_config(flow_hash_proto);
637 fhc = fib_table_get_flow_hash_config(fib_entry->fe_fib_index,
644 load_balance_create(0, lb_proto, fhc));
648 if (esrc->fes_entry_flags & FIB_ENTRY_FLAG_MULTICAST)
653 replicate_multipath_update(dpo_lb, ctx.next_hops);
657 load_balance_multipath_update(dpo_lb,
659 fib_entry_calc_lb_flags(&ctx, esrc));
660 vec_free(ctx.next_hops);
663 * if this entry is sourced by the uRPF-exempt source then we
664 * append the always present local0 interface (index 0) to the
665 * uRPF list so it is not empty. that way packets pass the loose check.
667 index_t ui = fib_path_list_get_urpf(esrc->fes_pl);
669 if ((fib_entry_is_sourced(fib_entry_get_index(fib_entry),
670 FIB_SOURCE_URPF_EXEMPT) ||
671 (esrc->fes_entry_flags & FIB_ENTRY_FLAG_LOOSE_URPF_EXEMPT))&&
672 (0 == fib_urpf_check_size(ui)))
675 * The uRPF list we get from the path-list is shared by all
676 * other users of the list, but the uRPF exemption applies
677 * only to this prefix. So we need our own list.
679 ui = fib_urpf_list_alloc_and_lock();
680 fib_urpf_list_append(ui, 0);
681 fib_urpf_list_bake(ui);
682 load_balance_set_urpf(dpo_lb->dpoi_index, ui);
683 fib_urpf_list_unlock(ui);
687 load_balance_set_urpf(dpo_lb->dpoi_index, ui);
689 load_balance_set_fib_entry_flags(dpo_lb->dpoi_index,
690 fib_entry_get_flags_i(fib_entry));
695 fib_entry_src_action_install (fib_entry_t *fib_entry,
699 * Install the forwarding chain for the given source into the forwarding
702 fib_forward_chain_type_t fct;
705 fct = fib_entry_get_default_chain_type(fib_entry);
708 * Every entry has its own load-balance object. All changes to the entry's
709 * forwarding result in an inplace modify of the load-balance. This means
710 * the load-balance object only needs to be added to the forwarding
711 * DB once, when it is created.
713 insert = !dpo_id_is_valid(&fib_entry->fe_lb);
715 fib_entry_src_mk_lb(fib_entry, source, fct, &fib_entry->fe_lb);
717 ASSERT(dpo_id_is_valid(&fib_entry->fe_lb));
718 FIB_ENTRY_DBG(fib_entry, "install: %d", fib_entry->fe_lb);
721 * insert the adj into the data-plane forwarding trie
725 fib_table_fwding_dpo_update(fib_entry->fe_fib_index,
726 &fib_entry->fe_prefix,
731 * if any of the other chain types are already created they will need
734 fib_entry_delegate_type_t fdt;
735 fib_entry_delegate_t *fed;
737 FOR_EACH_DELEGATE_CHAIN(fib_entry, fdt, fed,
739 fib_entry_src_mk_lb(fib_entry, source,
740 fib_entry_delegate_type_to_chain_type(fdt),
746 fib_entry_src_action_uninstall (fib_entry_t *fib_entry)
749 * uninstall the forwarding chain from the forwarding tables
751 FIB_ENTRY_DBG(fib_entry, "uninstall");
753 if (dpo_id_is_valid(&fib_entry->fe_lb))
755 fib_table_fwding_dpo_remove(
756 fib_entry->fe_fib_index,
757 &fib_entry->fe_prefix,
760 dpo_reset(&fib_entry->fe_lb);
765 fib_entry_recursive_loop_detect_i (fib_node_index_t path_list_index)
767 fib_node_index_t *entries = NULL;
769 fib_path_list_recursive_loop_detect(path_list_index, &entries);
775 * fib_entry_src_action_copy
777 * copy a source data from another entry to this one
780 fib_entry_src_action_copy (fib_entry_t *fib_entry,
781 const fib_entry_src_t *orig_src)
783 fib_entry_src_t *esrc;
785 esrc = fib_entry_src_find_or_create(fib_entry,
787 orig_src->fes_entry_flags);
789 FIB_ENTRY_SRC_VFT_INVOKE(fib_entry, esrc, fesv_copy,
790 (orig_src, fib_entry, esrc));
792 fib_path_list_unlock(esrc->fes_pl);
795 * copy over all the data ...
797 esrc->fes_flags = orig_src->fes_flags;
798 esrc->fes_pl = orig_src->fes_pl;
803 esrc->fes_ref_count = 1;
804 esrc->fes_flags |= FIB_ENTRY_SRC_FLAG_INHERITED;
805 esrc->fes_flags &= ~(FIB_ENTRY_SRC_FLAG_ACTIVE |
806 FIB_ENTRY_SRC_FLAG_CONTRIBUTING);
807 esrc->fes_entry_flags &= ~FIB_ENTRY_FLAG_COVERED_INHERIT;
810 * the source owns a lock on the entry
812 fib_path_list_lock(esrc->fes_pl);
813 fib_entry_lock(fib_entry_get_index(fib_entry));
819 * fib_entry_src_action_update
821 * copy a source data from another entry to this one
823 static fib_entry_src_t *
824 fib_entry_src_action_update_from_cover (fib_entry_t *fib_entry,
825 const fib_entry_src_t *orig_src)
827 fib_entry_src_t *esrc;
829 esrc = fib_entry_src_find_or_create(fib_entry,
831 orig_src->fes_entry_flags);
834 * the source owns a lock on the entry
836 fib_path_list_unlock(esrc->fes_pl);
837 esrc->fes_pl = orig_src->fes_pl;
838 fib_path_list_lock(esrc->fes_pl);
843 static fib_table_walk_rc_t
844 fib_entry_src_covered_inherit_add_i (fib_entry_t *fib_entry,
845 const fib_entry_src_t *cover_src)
847 fib_entry_src_t *esrc;
849 esrc = fib_entry_src_find(fib_entry, cover_src->fes_src);
851 if (cover_src == esrc)
853 return (FIB_TABLE_WALK_CONTINUE);
859 * the covered entry already has this source.
861 if (esrc->fes_entry_flags & FIB_ENTRY_FLAG_COVERED_INHERIT)
864 * the covered source is itself a COVERED_INHERIT, i.e.
865 * it also pushes this source down the sub-tree.
866 * We consider this more specific covered to be the owner
867 * of the sub-tree from this point down.
869 return (FIB_TABLE_WALK_SUB_TREE_STOP);
871 if (esrc->fes_flags & FIB_ENTRY_SRC_FLAG_INHERITED)
874 * The covered's source data has been inherited, presumably
875 * from this cover, i.e. this is a modify.
877 esrc = fib_entry_src_action_update_from_cover(fib_entry, cover_src);
878 fib_entry_source_change(fib_entry, esrc->fes_src, esrc->fes_src);
883 * The covered's source was not inherited and it is also
884 * not inheriting. Nevertheless, it still owns the sub-tree from
887 return (FIB_TABLE_WALK_SUB_TREE_STOP);
893 * The covered does not have this source - add it.
895 fib_source_t best_source;
897 best_source = fib_entry_get_best_source(
898 fib_entry_get_index(fib_entry));
900 fib_entry_src_action_copy(fib_entry, cover_src);
901 fib_entry_source_change(fib_entry, best_source, cover_src->fes_src);
904 return (FIB_TABLE_WALK_CONTINUE);
907 static fib_table_walk_rc_t
908 fib_entry_src_covered_inherit_walk_add (fib_node_index_t fei,
911 return (fib_entry_src_covered_inherit_add_i(fib_entry_get(fei), ctx));
914 static fib_table_walk_rc_t
915 fib_entry_src_covered_inherit_walk_remove (fib_node_index_t fei,
918 fib_entry_src_t *cover_src, *esrc;
919 fib_entry_t *fib_entry;
921 fib_entry = fib_entry_get(fei);
924 esrc = fib_entry_src_find(fib_entry, cover_src->fes_src);
926 if (cover_src == esrc)
928 return (FIB_TABLE_WALK_CONTINUE);
934 * the covered entry already has this source.
936 if (esrc->fes_entry_flags & FIB_ENTRY_FLAG_COVERED_INHERIT)
939 * the covered source is itself a COVERED_INHERIT, i.e.
940 * it also pushes this source down the sub-tree.
941 * We consider this more specific covered to be the owner
942 * of the sub-tree from this point down.
944 return (FIB_TABLE_WALK_SUB_TREE_STOP);
946 if (esrc->fes_flags & FIB_ENTRY_SRC_FLAG_INHERITED)
949 * The covered's source data has been inherited, presumably
952 fib_entry_src_flag_t remaining;
954 remaining = fib_entry_special_remove(fei, cover_src->fes_src);
956 ASSERT(FIB_ENTRY_SRC_FLAG_ADDED == remaining);
961 * The covered's source was not inherited and it is also
962 * not inheriting. Nevertheless, it still owns the sub-tree from
965 return (FIB_TABLE_WALK_SUB_TREE_STOP);
971 * The covered does not have this source - that's an error,
972 * since it should have inherited, but there is nothing we can do
976 return (FIB_TABLE_WALK_CONTINUE);
980 fib_entry_src_inherit (const fib_entry_t *cover,
981 fib_entry_t *covered)
983 CLIB_UNUSED(fib_source_t source);
984 const fib_entry_src_t *src;
986 FOR_EACH_SRC_ADDED(cover, src, source,
988 if ((src->fes_entry_flags & FIB_ENTRY_FLAG_COVERED_INHERIT) ||
989 (src->fes_flags & FIB_ENTRY_SRC_FLAG_INHERITED))
991 fib_entry_src_covered_inherit_add_i(covered, src);
997 fib_entry_src_covered_inherit_add (fib_entry_t *fib_entry,
1001 fib_entry_src_t *esrc;
1003 esrc = fib_entry_src_find(fib_entry, source);
1005 ASSERT(esrc->fes_flags & FIB_ENTRY_SRC_FLAG_ACTIVE);
1007 if ((esrc->fes_entry_flags & FIB_ENTRY_FLAG_COVERED_INHERIT) ||
1008 (esrc->fes_flags & FIB_ENTRY_SRC_FLAG_INHERITED))
1010 fib_table_sub_tree_walk(fib_entry->fe_fib_index,
1011 fib_entry->fe_prefix.fp_proto,
1012 &fib_entry->fe_prefix,
1013 fib_entry_src_covered_inherit_walk_add,
1019 fib_entry_src_covered_inherit_remove (fib_entry_t *fib_entry,
1020 fib_entry_src_t *esrc)
1023 ASSERT(!(esrc->fes_flags & FIB_ENTRY_SRC_FLAG_ACTIVE));
1025 if (esrc->fes_entry_flags & FIB_ENTRY_FLAG_COVERED_INHERIT)
1027 fib_table_sub_tree_walk(fib_entry->fe_fib_index,
1028 fib_entry->fe_prefix.fp_proto,
1029 &fib_entry->fe_prefix,
1030 fib_entry_src_covered_inherit_walk_remove,
1036 fib_entry_src_action_activate (fib_entry_t *fib_entry,
1037 fib_source_t source)
1040 int houston_we_are_go_for_install;
1041 const fib_entry_src_vft_t *vft;
1042 fib_entry_src_t *esrc;
1044 esrc = fib_entry_src_find(fib_entry, source);
1046 ASSERT(!(esrc->fes_flags & FIB_ENTRY_SRC_FLAG_ACTIVE));
1047 ASSERT(esrc->fes_flags & FIB_ENTRY_SRC_FLAG_ADDED);
1049 esrc->fes_flags |= (FIB_ENTRY_SRC_FLAG_ACTIVE |
1050 FIB_ENTRY_SRC_FLAG_CONTRIBUTING);
1051 vft = fib_entry_src_get_vft(esrc);
1053 if (NULL != vft->fesv_activate)
1055 houston_we_are_go_for_install = vft->fesv_activate(esrc, fib_entry);
1060 * the source is not providing an activate function, we'll assume
1061 * therefore it has no objection to installing the entry
1063 houston_we_are_go_for_install = !0;
1067 * link to the path-list provided by the source, and go check
1068 * if that forms any loops in the graph.
1070 fib_entry->fe_parent = esrc->fes_pl;
1071 fib_entry->fe_sibling =
1072 fib_path_list_child_add(fib_entry->fe_parent,
1073 FIB_NODE_TYPE_ENTRY,
1074 fib_entry_get_index(fib_entry));
1076 fib_entry_recursive_loop_detect_i(fib_entry->fe_parent);
1078 FIB_ENTRY_DBG(fib_entry, "activate: %d",
1079 fib_entry->fe_parent);
1082 * If this source should push its state to covered prefixs, do that now.
1084 fib_entry_src_covered_inherit_add(fib_entry, source);
1086 if (0 != houston_we_are_go_for_install)
1088 fib_entry_src_action_install(fib_entry, source);
1092 fib_entry_src_action_uninstall(fib_entry);
1097 fib_entry_src_action_deactivate (fib_entry_t *fib_entry,
1098 fib_source_t source)
1101 fib_node_index_t path_list_index;
1102 fib_entry_src_t *esrc;
1104 esrc = fib_entry_src_find(fib_entry, source);
1106 ASSERT(esrc->fes_flags & FIB_ENTRY_SRC_FLAG_ACTIVE);
1108 FIB_ENTRY_SRC_VFT_INVOKE(fib_entry, esrc, fesv_deactivate,
1111 esrc->fes_flags &= ~(FIB_ENTRY_SRC_FLAG_ACTIVE |
1112 FIB_ENTRY_SRC_FLAG_CONTRIBUTING);
1114 FIB_ENTRY_DBG(fib_entry, "deactivate: %d", fib_entry->fe_parent);
1117 * If this source should pull its state from covered prefixs, do that now.
1118 * If this source also has the INHERITED flag set then it has a cover
1119 * that wants to push down forwarding. We only want the covereds to see
1122 fib_entry_src_covered_inherit_remove(fib_entry, esrc);
1125 * un-link from an old path-list. Check for any loops this will clear
1127 path_list_index = fib_entry->fe_parent;
1128 fib_entry->fe_parent = FIB_NODE_INDEX_INVALID;
1130 fib_entry_recursive_loop_detect_i(path_list_index);
1133 * this will unlock the path-list, so it may be invalid thereafter.
1135 fib_path_list_child_remove(path_list_index, fib_entry->fe_sibling);
1136 fib_entry->fe_sibling = FIB_NODE_INDEX_INVALID;
1140 fib_entry_src_action_fwd_update (const fib_entry_t *fib_entry,
1141 fib_source_t source)
1143 fib_entry_src_t *esrc;
1145 vec_foreach(esrc, fib_entry->fe_srcs)
1147 FIB_ENTRY_SRC_VFT_INVOKE(fib_entry, esrc, fesv_fwd_update,
1148 (esrc, fib_entry, source));
1153 fib_entry_src_action_reactivate (fib_entry_t *fib_entry,
1154 fib_source_t source)
1156 fib_node_index_t path_list_index;
1157 const fib_entry_src_vft_t *vft;
1158 fib_entry_src_t *esrc;
1159 int remain_installed;
1161 esrc = fib_entry_src_find(fib_entry, source);
1163 ASSERT(esrc->fes_flags & FIB_ENTRY_SRC_FLAG_ACTIVE);
1165 FIB_ENTRY_DBG(fib_entry, "reactivate: %d to %d",
1166 fib_entry->fe_parent,
1170 * call the source to reactive and get the go/no-go to remain installed
1172 vft = fib_entry_src_get_vft(esrc);
1174 if (NULL != vft->fesv_reactivate)
1176 remain_installed = vft->fesv_reactivate(esrc, fib_entry);
1180 remain_installed = 1;
1183 if (fib_entry->fe_parent != esrc->fes_pl)
1186 * un-link from an old path-list. Check for any loops this will clear
1188 path_list_index = fib_entry->fe_parent;
1189 fib_entry->fe_parent = FIB_NODE_INDEX_INVALID;
1192 * temporary lock so it doesn't get deleted when this entry is no
1195 fib_path_list_lock(path_list_index);
1198 * this entry is no longer a child. after unlinking check if any loops
1201 fib_path_list_child_remove(path_list_index,
1202 fib_entry->fe_sibling);
1204 fib_entry_recursive_loop_detect_i(path_list_index);
1207 * link to the path-list provided by the source, and go check
1208 * if that forms any loops in the graph.
1210 fib_entry->fe_parent = esrc->fes_pl;
1211 fib_entry->fe_sibling =
1212 fib_path_list_child_add(fib_entry->fe_parent,
1213 FIB_NODE_TYPE_ENTRY,
1214 fib_entry_get_index(fib_entry));
1216 fib_entry_recursive_loop_detect_i(fib_entry->fe_parent);
1217 fib_path_list_unlock(path_list_index);
1220 * If this source should push its state to covered prefixs, do that now.
1222 fib_entry_src_covered_inherit_add(fib_entry, source);
1225 if (!remain_installed)
1227 fib_entry_src_action_uninstall(fib_entry);
1231 fib_entry_src_action_install(fib_entry, source);
1233 fib_entry_src_action_fwd_update(fib_entry, source);
1237 fib_entry_src_action_installed (fib_entry_t *fib_entry,
1238 fib_source_t source)
1240 fib_entry_src_t *esrc;
1242 esrc = fib_entry_src_find(fib_entry, source);
1244 FIB_ENTRY_SRC_VFT_INVOKE(fib_entry, esrc, fesv_installed,
1247 fib_entry_src_action_fwd_update(fib_entry, source);
1253 * fib_entry_src_action_add
1255 * Adding a source can result in a new fib_entry being created, which
1256 * can inturn mean the pool is realloc'd and thus the entry passed as
1257 * an argument it also realloc'd
1258 * @return the original entry
1261 fib_entry_src_action_add (fib_entry_t *fib_entry,
1262 fib_source_t source,
1263 fib_entry_flag_t flags,
1264 const dpo_id_t *dpo)
1266 fib_entry_src_t *esrc;
1268 esrc = fib_entry_src_find_or_create(fib_entry, source, flags);
1270 ASSERT(esrc->fes_ref_count < 255);
1271 esrc->fes_ref_count++;
1273 if (flags != esrc->fes_entry_flags)
1275 FIB_ENTRY_SRC_VFT_INVOKE(fib_entry, esrc, fesv_flags_change,
1276 (esrc, fib_entry, flags));
1278 esrc->fes_entry_flags = flags;
1280 if (1 != esrc->fes_ref_count)
1283 * we only want to add the source on the 0->1 transition
1288 FIB_ENTRY_SRC_VFT_INVOKE(fib_entry, esrc, fesv_add,
1292 fib_entry_get_dpo_proto(fib_entry),
1295 esrc->fes_flags |= FIB_ENTRY_SRC_FLAG_ADDED;
1297 fib_path_list_lock(esrc->fes_pl);
1300 * the source owns a lock on the entry
1302 fib_entry_lock(fib_entry_get_index(fib_entry));
1308 * fib_entry_src_action_update
1310 * Adding a source can result in a new fib_entry being created, which
1311 * can inturn mean the pool is realloc'd and thus the entry passed as
1312 * an argument it also realloc'd
1313 * @return the original entry
1316 fib_entry_src_action_update (fib_entry_t *fib_entry,
1317 fib_source_t source,
1318 fib_entry_flag_t flags,
1319 const dpo_id_t *dpo)
1321 fib_node_index_t old_path_list_index;
1322 fib_entry_src_t *esrc;
1324 esrc = fib_entry_src_find_or_create(fib_entry, source, flags);
1328 return (fib_entry_src_action_add(fib_entry, source, flags, dpo));
1331 old_path_list_index = esrc->fes_pl;
1332 esrc->fes_entry_flags = flags;
1334 FIB_ENTRY_SRC_VFT_INVOKE(fib_entry, esrc, fesv_add,
1338 fib_entry_get_dpo_proto(fib_entry),
1341 esrc->fes_flags |= FIB_ENTRY_SRC_FLAG_ADDED;
1343 fib_path_list_lock(esrc->fes_pl);
1344 fib_path_list_unlock(old_path_list_index);
1349 fib_entry_src_flag_t
1350 fib_entry_src_action_remove_or_update_inherit (fib_entry_t *fib_entry,
1351 fib_source_t source)
1353 fib_entry_src_t *esrc;
1355 esrc = fib_entry_src_find(fib_entry, source);
1358 return (FIB_ENTRY_SRC_FLAG_ACTIVE);
1360 if ((esrc->fes_entry_flags & FIB_ENTRY_FLAG_COVERED_INHERIT) &&
1361 (esrc->fes_flags & FIB_ENTRY_SRC_FLAG_INHERITED))
1363 fib_entry_src_t *cover_src;
1364 fib_node_index_t coveri;
1368 * this source was pushing inherited state, but so is its
1369 * cover. Now that this source is going away, we need to
1370 * pull the covers forwarding and use it to update the covereds.
1371 * Go grab the path-list from the cover, rather than start a walk from
1372 * the cover, so we don't recursively update this entry.
1374 coveri = fib_table_get_less_specific(fib_entry->fe_fib_index,
1375 &fib_entry->fe_prefix);
1378 * only the default route has itself as its own cover, but the
1379 * default route cannot have inherited from something else.
1381 ASSERT(coveri != fib_entry_get_index(fib_entry));
1383 cover = fib_entry_get(coveri);
1384 cover_src = fib_entry_src_find(cover, source);
1386 ASSERT(NULL != cover_src);
1388 esrc = fib_entry_src_action_update_from_cover(fib_entry, cover_src);
1389 esrc->fes_entry_flags &= ~FIB_ENTRY_FLAG_COVERED_INHERIT;
1392 * Now push the new state from the cover down to the covereds
1394 fib_entry_src_covered_inherit_add(fib_entry, source);
1396 return (esrc->fes_flags);
1400 return (fib_entry_src_action_remove(fib_entry, source));
1404 fib_entry_src_flag_t
1405 fib_entry_src_action_remove (fib_entry_t *fib_entry,
1406 fib_source_t source)
1409 fib_node_index_t old_path_list;
1410 fib_entry_src_flag_t sflags;
1411 fib_entry_src_t *esrc;
1413 esrc = fib_entry_src_find(fib_entry, source);
1416 return (FIB_ENTRY_SRC_FLAG_ACTIVE);
1418 esrc->fes_ref_count--;
1419 sflags = esrc->fes_flags;
1421 if (0 != esrc->fes_ref_count)
1424 * only remove the source on the 1->0 transisition
1429 if (esrc->fes_flags & FIB_ENTRY_SRC_FLAG_ACTIVE)
1431 fib_entry_src_action_deactivate(fib_entry, source);
1433 else if (esrc->fes_flags & FIB_ENTRY_SRC_FLAG_CONTRIBUTING)
1435 FIB_ENTRY_SRC_VFT_INVOKE(fib_entry, esrc, fesv_deactivate,
1437 esrc->fes_flags &= ~FIB_ENTRY_SRC_FLAG_CONTRIBUTING;
1440 old_path_list = esrc->fes_pl;
1442 FIB_ENTRY_SRC_VFT_INVOKE(fib_entry, esrc, fesv_remove, (esrc));
1444 fib_path_list_unlock(old_path_list);
1445 fib_entry_unlock(fib_entry_get_index(fib_entry));
1447 sflags &= ~FIB_ENTRY_SRC_FLAG_ADDED;
1448 fib_entry_src_action_deinit(fib_entry, source);
1454 * fib_route_attached_cross_table
1456 * Return true the the route is attached via an interface that
1457 * is not in the same table as the route
1460 fib_route_attached_cross_table (const fib_entry_t *fib_entry,
1461 const fib_route_path_t *rpath)
1463 const fib_prefix_t *pfx = &fib_entry->fe_prefix;
1465 switch (pfx->fp_proto)
1467 case FIB_PROTOCOL_MPLS:
1468 /* MPLS routes are never imported/exported */
1470 case FIB_PROTOCOL_IP6:
1471 /* Ignore link local addresses these also can't be imported/exported */
1472 if (ip6_address_is_link_local_unicast (&pfx->fp_addr.ip6))
1477 case FIB_PROTOCOL_IP4:
1482 * an attached path and entry's fib index not equal to interface's index
1484 if (fib_route_path_is_attached(rpath) &&
1485 fib_entry->fe_fib_index !=
1486 fib_table_get_index_for_sw_if_index(fib_entry_get_proto(fib_entry),
1487 rpath->frp_sw_if_index))
1494 fib_path_list_flags_t
1495 fib_entry_src_flags_2_path_list_flags (fib_entry_flag_t eflags)
1497 fib_path_list_flags_t plf = FIB_PATH_LIST_FLAG_NONE;
1499 if (eflags & FIB_ENTRY_FLAG_DROP)
1501 plf |= FIB_PATH_LIST_FLAG_DROP;
1503 if (eflags & FIB_ENTRY_FLAG_EXCLUSIVE)
1505 plf |= FIB_PATH_LIST_FLAG_EXCLUSIVE;
1507 if (eflags & FIB_ENTRY_FLAG_LOCAL)
1509 plf |= FIB_PATH_LIST_FLAG_LOCAL;
1516 fib_entry_flags_update (const fib_entry_t *fib_entry,
1517 const fib_route_path_t *rpaths,
1518 fib_path_list_flags_t *pl_flags,
1519 fib_entry_src_t *esrc)
1521 const fib_route_path_t *rpath;
1523 vec_foreach(rpath, rpaths)
1525 if ((esrc->fes_src == FIB_SOURCE_API) ||
1526 (esrc->fes_src == FIB_SOURCE_CLI))
1528 if (fib_route_path_is_attached(rpath))
1530 esrc->fes_entry_flags |= FIB_ENTRY_FLAG_ATTACHED;
1534 esrc->fes_entry_flags &= ~FIB_ENTRY_FLAG_ATTACHED;
1536 if (rpath->frp_flags & FIB_ROUTE_PATH_DEAG)
1538 esrc->fes_entry_flags |= FIB_ENTRY_FLAG_LOOSE_URPF_EXEMPT;
1541 if (fib_route_attached_cross_table(fib_entry, rpath) &&
1542 !(esrc->fes_entry_flags & FIB_ENTRY_FLAG_NO_ATTACHED_EXPORT))
1544 esrc->fes_entry_flags |= FIB_ENTRY_FLAG_IMPORT;
1548 esrc->fes_entry_flags &= ~FIB_ENTRY_FLAG_IMPORT;
1554 * fib_entry_src_action_add
1556 * Adding a source can result in a new fib_entry being created, which
1557 * can inturn mean the pool is realloc'd and thus the entry passed as
1558 * an argument it also realloc'd
1562 fib_entry_src_action_path_add (fib_entry_t *fib_entry,
1563 fib_source_t source,
1564 fib_entry_flag_t flags,
1565 const fib_route_path_t *rpaths)
1567 fib_node_index_t old_path_list;
1568 fib_path_list_flags_t pl_flags;
1569 fib_entry_src_t *esrc;
1571 esrc = fib_entry_src_find(fib_entry, source);
1574 const dpo_id_t *dpo;
1576 if (flags == FIB_ENTRY_FLAG_EXCLUSIVE) {
1579 dpo = drop_dpo_get(fib_entry_get_dpo_proto(fib_entry));
1583 fib_entry_src_action_add(fib_entry,
1587 esrc = fib_entry_src_find(fib_entry, source);
1591 * we are no doubt modifying a path-list. If the path-list
1592 * is shared, and hence not modifiable, then the index returned
1593 * will be for a different path-list. This FIB entry to needs
1594 * to maintain its lock appropriately.
1596 old_path_list = esrc->fes_pl;
1598 ASSERT(FIB_ENTRY_SRC_VFT_EXISTS(esrc, fesv_path_add));
1600 pl_flags = fib_entry_src_flags_2_path_list_flags(fib_entry_get_flags_i(fib_entry));
1601 fib_entry_flags_update(fib_entry, rpaths, &pl_flags, esrc);
1603 FIB_ENTRY_SRC_VFT_INVOKE(fib_entry, esrc, fesv_path_add,
1604 (esrc, fib_entry, pl_flags, rpaths));
1606 fib_path_list_lock(esrc->fes_pl);
1607 fib_path_list_unlock(old_path_list);
1613 * fib_entry_src_action_swap
1615 * The source is providing new paths to replace the old ones.
1616 * Adding a source can result in a new fib_entry being created, which
1617 * can inturn mean the pool is realloc'd and thus the entry passed as
1618 * an argument it also realloc'd
1622 fib_entry_src_action_path_swap (fib_entry_t *fib_entry,
1623 fib_source_t source,
1624 fib_entry_flag_t flags,
1625 const fib_route_path_t *rpaths)
1627 fib_node_index_t old_path_list;
1628 fib_path_list_flags_t pl_flags;
1629 fib_entry_src_t *esrc;
1631 esrc = fib_entry_src_find(fib_entry, source);
1635 const dpo_id_t *dpo;
1637 if (flags == FIB_ENTRY_FLAG_EXCLUSIVE) {
1640 dpo = drop_dpo_get(fib_entry_get_dpo_proto(fib_entry));
1643 fib_entry = fib_entry_src_action_add(fib_entry,
1647 esrc = fib_entry_src_find(fib_entry, source);
1651 if (flags != esrc->fes_entry_flags)
1653 FIB_ENTRY_SRC_VFT_INVOKE(fib_entry, esrc, fesv_flags_change,
1654 (esrc, fib_entry, flags));
1656 esrc->fes_entry_flags = flags;
1660 * swapping paths may create a new path-list (or may use an existing shared)
1661 * but we are certainly getting a different one. This FIB entry to needs
1662 * to maintain its lock appropriately.
1664 old_path_list = esrc->fes_pl;
1666 ASSERT(FIB_ENTRY_SRC_VFT_EXISTS(esrc, fesv_path_swap));
1668 pl_flags = fib_entry_src_flags_2_path_list_flags(flags);
1670 fib_entry_flags_update(fib_entry, rpaths, &pl_flags, esrc);
1672 FIB_ENTRY_SRC_VFT_INVOKE(fib_entry, esrc, fesv_path_swap,
1676 fib_path_list_lock(esrc->fes_pl);
1677 fib_path_list_unlock(old_path_list);
1682 fib_entry_src_flag_t
1683 fib_entry_src_action_path_remove (fib_entry_t *fib_entry,
1684 fib_source_t source,
1685 const fib_route_path_t *rpaths)
1687 fib_path_list_flags_t pl_flags;
1688 fib_node_index_t old_path_list;
1689 fib_entry_src_t *esrc;
1691 esrc = fib_entry_src_find(fib_entry, source);
1693 ASSERT(NULL != esrc);
1694 ASSERT(esrc->fes_flags & FIB_ENTRY_SRC_FLAG_ADDED);
1697 * we no doubt modifying a path-list. If the path-list
1698 * is shared, and hence not modifiable, then the index returned
1699 * will be for a different path-list. This FIB entry to needs
1700 * to maintain its lock appropriately.
1702 old_path_list = esrc->fes_pl;
1704 ASSERT(FIB_ENTRY_SRC_VFT_EXISTS(esrc, fesv_path_remove));
1706 pl_flags = fib_entry_src_flags_2_path_list_flags(fib_entry_get_flags_i(fib_entry));
1707 fib_entry_flags_update(fib_entry, rpaths, &pl_flags, esrc);
1709 FIB_ENTRY_SRC_VFT_INVOKE(fib_entry, esrc, fesv_path_remove,
1710 (esrc, pl_flags, rpaths));
1713 * lock the new path-list, unlock the old if it had one
1715 fib_path_list_unlock(old_path_list);
1717 if (FIB_NODE_INDEX_INVALID != esrc->fes_pl) {
1718 fib_path_list_lock(esrc->fes_pl);
1719 return (FIB_ENTRY_SRC_FLAG_ADDED);
1724 * no more paths left from this source
1726 fib_entry_src_action_remove_or_update_inherit(fib_entry, source);
1727 return (FIB_ENTRY_SRC_FLAG_NONE);
1732 fib_entry_src_format (fib_entry_t *fib_entry,
1733 fib_source_t source,
1736 fib_entry_src_t *esrc;
1738 esrc = fib_entry_src_find(fib_entry, source);
1740 FIB_ENTRY_SRC_VFT_INVOKE_AND_RETURN(esrc, fesv_format, (esrc, s));
1746 fib_entry_get_adj_for_source (fib_node_index_t fib_entry_index,
1747 fib_source_t source)
1749 fib_entry_t *fib_entry;
1750 fib_entry_src_t *esrc;
1752 if (FIB_NODE_INDEX_INVALID == fib_entry_index)
1753 return (ADJ_INDEX_INVALID);
1755 fib_entry = fib_entry_get(fib_entry_index);
1756 esrc = fib_entry_src_find(fib_entry, source);
1760 if (FIB_NODE_INDEX_INVALID != esrc->fes_pl)
1762 return (fib_path_list_get_adj(
1764 fib_entry_get_default_chain_type(fib_entry)));
1767 return (ADJ_INDEX_INVALID);
1771 fib_entry_get_dpo_for_source (fib_node_index_t fib_entry_index,
1772 fib_source_t source,
1775 fib_entry_t *fib_entry;
1776 fib_entry_src_t *esrc;
1778 if (FIB_NODE_INDEX_INVALID == fib_entry_index)
1781 fib_entry = fib_entry_get(fib_entry_index);
1782 esrc = fib_entry_src_find(fib_entry, source);
1786 if (FIB_NODE_INDEX_INVALID != esrc->fes_pl)
1788 fib_path_list_contribute_forwarding(
1790 fib_entry_get_default_chain_type(fib_entry),
1791 FIB_PATH_LIST_FWD_FLAG_NONE,
1794 return (dpo_id_is_valid(dpo));
1801 fib_entry_get_path_list_for_source (fib_node_index_t fib_entry_index,
1802 fib_source_t source)
1804 fib_entry_t *fib_entry;
1805 fib_entry_src_t *esrc;
1807 if (FIB_NODE_INDEX_INVALID == fib_entry_index)
1808 return FIB_NODE_INDEX_INVALID;
1810 fib_entry = fib_entry_get(fib_entry_index);
1811 esrc = fib_entry_src_find(fib_entry, source);
1814 return esrc->fes_pl;
1816 return FIB_NODE_INDEX_INVALID;
1820 fib_entry_get_resolving_interface_for_source (fib_node_index_t entry_index,
1821 fib_source_t source)
1823 fib_entry_t *fib_entry;
1824 fib_entry_src_t *esrc;
1826 fib_entry = fib_entry_get(entry_index);
1828 esrc = fib_entry_src_find(fib_entry, source);
1832 if (FIB_NODE_INDEX_INVALID != esrc->fes_pl)
1834 return (fib_path_list_get_resolving_interface(esrc->fes_pl));
1841 fib_entry_get_flags_for_source (fib_node_index_t entry_index,
1842 fib_source_t source)
1844 fib_entry_t *fib_entry;
1845 fib_entry_src_t *esrc;
1847 fib_entry = fib_entry_get(entry_index);
1849 esrc = fib_entry_src_find(fib_entry, source);
1853 return (esrc->fes_entry_flags);
1856 return (FIB_ENTRY_FLAG_NONE);
1860 fib_entry_get_source_i (const fib_entry_t *fib_entry)
1862 /* the vector of sources is deliberately arranged in priority order */
1863 if (0 == vec_len(fib_entry->fe_srcs))
1864 return (FIB_SOURCE_INVALID);
1865 return (vec_elt(fib_entry->fe_srcs, 0).fes_src);
1869 fib_entry_get_flags_i (const fib_entry_t *fib_entry)
1871 /* the vector of sources is deliberately arranged in priority order */
1872 if (0 == vec_len(fib_entry->fe_srcs))
1873 return (FIB_ENTRY_FLAG_NONE);
1874 return (vec_elt(fib_entry->fe_srcs, 0).fes_entry_flags);
1878 fib_entry_set_source_data (fib_node_index_t fib_entry_index,
1879 fib_source_t source,
1882 fib_entry_t *fib_entry;
1883 fib_entry_src_t *esrc;
1885 fib_entry = fib_entry_get(fib_entry_index);
1886 esrc = fib_entry_src_find(fib_entry, source);
1890 FIB_ENTRY_SRC_VFT_INVOKE(fib_entry, esrc, fesv_set_data,
1891 (esrc, fib_entry, data));
1896 fib_entry_get_source_data (fib_node_index_t fib_entry_index,
1897 fib_source_t source)
1899 fib_entry_t *fib_entry;
1900 fib_entry_src_t *esrc;
1902 fib_entry = fib_entry_get(fib_entry_index);
1903 esrc = fib_entry_src_find(fib_entry, source);
1907 FIB_ENTRY_SRC_VFT_INVOKE_AND_RETURN(esrc, fesv_get_data,
1914 fib_entry_src_module_init (void)
1916 fib_entry_src_rr_register();
1917 fib_entry_src_interface_register();
1918 fib_entry_src_interpose_register();
1919 fib_entry_src_drop_register();
1920 fib_entry_src_simple_register();
1921 fib_entry_src_api_register();
1922 fib_entry_src_adj_register();
1923 fib_entry_src_mpls_register();
1924 fib_entry_src_lisp_register();