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 <vlib/vlib.h>
18 #include <vnet/mfib/mfib_entry.h>
19 #include <vnet/fib/fib_path_list.h>
21 #include <vnet/dpo/drop_dpo.h>
22 #include <vnet/dpo/replicate_dpo.h>
28 #DEFIne MFIB_ENTRY_DBG(_e, _fmt, _args...) \
31 __tmp = format(__tmp, "e:[%d:%U", \
32 mfib_entry_get_index(_e), \
33 format_ip46_address, \
34 &_e->mfe_prefix.fp_grp_addr, \
36 __tmp = format(__tmp, "/%d,", \
37 _e->mfe_prefix.fp_len); \
38 __tmp = format(__tmp, "%U]", \
39 mfib_entry_get_index(_e), \
40 format_ip46_address, \
41 &_e->mfe_prefix.fp_src_addr, \
43 __tmp = format(__tmp, _fmt, ##_args); \
44 clib_warning("%s", __tmp); \
48 #define MFIB_ENTRY_DBG(_e, _fmt, _args...)
52 * MFIB extensions to each path
54 typedef struct mfib_path_ext_t_
56 mfib_itf_flags_t mfpe_flags;
57 fib_node_index_t mfpe_path;
61 * The source of an MFIB entry
63 typedef struct mfib_entry_src_t_
66 * Which source this is
68 mfib_source_t mfes_src;
73 mfib_entry_flags_t mfes_flags;
76 * The path-list of forwarding interfaces
78 fib_node_index_t mfes_pl;
83 fib_rpf_id_t mfes_rpf_id;
86 * Hash table of path extensions
88 mfib_path_ext_t *mfes_exts;
91 * The hash table of all interfaces.
92 * This is forwarding time information derived from the paths
93 * and their extensions.
95 mfib_itf_t *mfes_itfs;
99 * Pool of path extensions
101 static mfib_path_ext_t *mfib_path_ext_pool;
104 * String names for each source
106 static const char *mfib_source_names[] = MFIB_SOURCE_NAMES;
109 * Pool for all fib_entries
111 mfib_entry_t *mfib_entry_pool;
114 mfib_entry_get_node (fib_node_index_t index)
116 return ((fib_node_t*)mfib_entry_get(index));
119 static fib_protocol_t
120 mfib_entry_get_proto (const mfib_entry_t * mfib_entry)
122 return (mfib_entry->mfe_prefix.fp_proto);
125 fib_forward_chain_type_t
126 mfib_entry_get_default_chain_type (const mfib_entry_t *mfib_entry)
128 switch (mfib_entry->mfe_prefix.fp_proto)
130 case FIB_PROTOCOL_IP4:
131 return (FIB_FORW_CHAIN_TYPE_MCAST_IP4);
132 case FIB_PROTOCOL_IP6:
133 return (FIB_FORW_CHAIN_TYPE_MCAST_IP6);
134 case FIB_PROTOCOL_MPLS:
138 return (FIB_FORW_CHAIN_TYPE_MCAST_IP4);
142 format_mfib_entry_dpo (u8 * s, va_list * args)
144 index_t fei = va_arg(*args, index_t);
145 CLIB_UNUSED(u32 indent) = va_arg(*args, u32);
147 return (format(s, "%U",
148 format_mfib_entry, fei,
149 MFIB_ENTRY_FORMAT_BRIEF));
152 static inline mfib_path_ext_t *
153 mfib_entry_path_ext_get (index_t mi)
155 return (pool_elt_at_index(mfib_path_ext_pool, mi));
159 format_mfib_entry_path_ext (u8 * s, va_list * args)
161 mfib_path_ext_t *path_ext;
162 index_t mpi = va_arg(*args, index_t);
164 path_ext = mfib_entry_path_ext_get(mpi);
165 return (format(s, "path:%d flags:%U",
167 format_mfib_itf_flags, path_ext->mfpe_flags));
171 format_mfib_entry (u8 * s, va_list * args)
173 fib_node_index_t fei, mfi;
174 mfib_entry_t *mfib_entry;
175 mfib_entry_src_t *msrc;
179 fei = va_arg (*args, fib_node_index_t);
180 level = va_arg (*args, int);
181 mfib_entry = mfib_entry_get(fei);
183 s = format (s, "%U", format_mfib_prefix, &mfib_entry->mfe_prefix);
184 s = format (s, ": %U", format_mfib_entry_flags, mfib_entry->mfe_flags);
186 if (level >= MFIB_ENTRY_FORMAT_DETAIL)
188 fib_node_index_t path_index, mpi;
190 s = format (s, "\n");
191 s = format (s, " fib:%d", mfib_entry->mfe_fib_index);
192 s = format (s, " index:%d", mfib_entry_get_index(mfib_entry));
193 s = format (s, " locks:%d\n", mfib_entry->mfe_node.fn_locks);
194 vec_foreach(msrc, mfib_entry->mfe_srcs)
196 s = format (s, " src:%s", mfib_source_names[msrc->mfes_src]);
197 s = format (s, ": %U\n", format_mfib_entry_flags, msrc->mfes_flags);
198 if (FIB_NODE_INDEX_INVALID != msrc->mfes_pl)
200 s = fib_path_list_format(msrc->mfes_pl, s);
202 s = format (s, " Extensions:\n");
203 hash_foreach(path_index, mpi, msrc->mfes_exts,
205 s = format(s, " %U\n", format_mfib_entry_path_ext, mpi);
207 s = format (s, " Interface-Forwarding:\n");
208 hash_foreach(sw_if_index, mfi, msrc->mfes_itfs,
210 s = format(s, " %U\n", format_mfib_itf, mfi);
215 s = format(s, "\n Interfaces:");
216 hash_foreach(sw_if_index, mfi, mfib_entry->mfe_itfs,
218 s = format(s, "\n %U", format_mfib_itf, mfi);
220 s = format(s, "\n RPF-ID:%d", mfib_entry->mfe_rpf_id);
221 s = format(s, "\n %U-chain\n %U",
222 format_fib_forw_chain_type,
223 mfib_entry_get_default_chain_type(mfib_entry),
225 &mfib_entry->mfe_rep,
229 if (level >= MFIB_ENTRY_FORMAT_DETAIL2)
231 s = format(s, "\nchildren:");
232 s = fib_node_children_format(mfib_entry->mfe_node.fn_children, s);
239 mfib_entry_from_fib_node (fib_node_t *node)
241 ASSERT(FIB_NODE_TYPE_MFIB_ENTRY == node->fn_type);
242 return ((mfib_entry_t*)node);
246 mfib_entry_src_cmp_for_sort (void * v1,
249 mfib_entry_src_t *esrc1 = v1, *esrc2 = v2;
251 return (esrc1->mfes_src - esrc2->mfes_src);
255 mfib_entry_src_init (mfib_entry_t *mfib_entry,
256 mfib_source_t source)
259 mfib_entry_src_t esrc = {
260 .mfes_pl = FIB_NODE_INDEX_INVALID,
261 .mfes_flags = MFIB_ENTRY_FLAG_NONE,
265 vec_add1(mfib_entry->mfe_srcs, esrc);
266 vec_sort_with_function(mfib_entry->mfe_srcs,
267 mfib_entry_src_cmp_for_sort);
270 static mfib_entry_src_t *
271 mfib_entry_src_find (const mfib_entry_t *mfib_entry,
272 mfib_source_t source,
276 mfib_entry_src_t *esrc;
280 vec_foreach(esrc, mfib_entry->mfe_srcs)
282 if (esrc->mfes_src == source)
299 static mfib_entry_src_t *
300 mfib_entry_src_find_or_create (mfib_entry_t *mfib_entry,
301 mfib_source_t source)
303 mfib_entry_src_t *esrc;
305 esrc = mfib_entry_src_find(mfib_entry, source, NULL);
309 mfib_entry_src_init(mfib_entry, source);
312 return (mfib_entry_src_find(mfib_entry, source, NULL));
315 static mfib_entry_src_t*
316 mfib_entry_get_best_src (const mfib_entry_t *mfib_entry)
318 mfib_entry_src_t *bsrc;
321 * the enum of sources is deliberately arranged in priority order
323 if (0 == vec_len(mfib_entry->mfe_srcs))
329 bsrc = vec_elt_at_index(mfib_entry->mfe_srcs, 0);
336 mfib_entry_is_sourced (fib_node_index_t mfib_entry_index,
337 mfib_source_t source)
339 mfib_entry_t *mfib_entry;
341 mfib_entry = mfib_entry_get(mfib_entry_index);
343 return (NULL != mfib_entry_src_find(mfib_entry, source, NULL));
347 mfib_entry_src_flush (mfib_entry_src_t *msrc)
352 hash_foreach(sw_if_index, mfii, msrc->mfes_itfs,
354 mfib_itf_delete(mfib_itf_get(mfii));
356 hash_free(msrc->mfes_itfs);
357 msrc->mfes_itfs = NULL;
358 fib_path_list_unlock(msrc->mfes_pl);
362 mfib_entry_src_remove (mfib_entry_t *mfib_entry,
363 mfib_source_t source)
366 mfib_entry_src_t *msrc;
369 msrc = mfib_entry_src_find(mfib_entry, source, &index);
373 mfib_entry_src_flush(msrc);
374 vec_del1(mfib_entry->mfe_srcs, index);
379 mfib_entry_child_add (fib_node_index_t mfib_entry_index,
380 fib_node_type_t child_type,
381 fib_node_index_t child_index)
383 return (fib_node_child_add(FIB_NODE_TYPE_MFIB_ENTRY,
390 mfib_entry_child_remove (fib_node_index_t mfib_entry_index,
393 fib_node_child_remove(FIB_NODE_TYPE_MFIB_ENTRY,
398 static mfib_entry_t *
399 mfib_entry_alloc (u32 fib_index,
400 const mfib_prefix_t *prefix,
401 fib_node_index_t *mfib_entry_index)
403 mfib_entry_t *mfib_entry;
405 pool_get_aligned(mfib_entry_pool, mfib_entry, CLIB_CACHE_LINE_BYTES);
407 fib_node_init(&mfib_entry->mfe_node,
408 FIB_NODE_TYPE_MFIB_ENTRY);
411 * Some of the members require non-default initialisation
412 * so we also init those that don't and thus save on the call to memset.
414 mfib_entry->mfe_flags = 0;
415 mfib_entry->mfe_fib_index = fib_index;
416 mfib_entry->mfe_prefix = *prefix;
417 mfib_entry->mfe_srcs = NULL;
418 mfib_entry->mfe_itfs = NULL;
419 mfib_entry->mfe_rpf_id = MFIB_RPF_ID_NONE;
420 mfib_entry->mfe_pl = FIB_NODE_INDEX_INVALID;
422 dpo_reset(&mfib_entry->mfe_rep);
424 *mfib_entry_index = mfib_entry_get_index(mfib_entry);
426 MFIB_ENTRY_DBG(mfib_entry, "alloc");
431 static inline mfib_path_ext_t *
432 mfib_entry_path_ext_find (mfib_path_ext_t *exts,
433 fib_node_index_t path_index)
437 p = hash_get(exts, path_index);
441 return (mfib_entry_path_ext_get(p[0]));
447 static mfib_path_ext_t*
448 mfib_path_ext_add (mfib_entry_src_t *msrc,
449 fib_node_index_t path_index,
450 mfib_itf_flags_t mfi_flags)
452 mfib_path_ext_t *path_ext;
454 pool_get(mfib_path_ext_pool, path_ext);
456 path_ext->mfpe_flags = mfi_flags;
457 path_ext->mfpe_path = path_index;
459 hash_set(msrc->mfes_exts, path_index,
460 path_ext - mfib_path_ext_pool);
466 mfib_path_ext_remove (mfib_entry_src_t *msrc,
467 fib_node_index_t path_index)
469 mfib_path_ext_t *path_ext;
471 path_ext = mfib_entry_path_ext_find(msrc->mfes_exts, path_index);
473 hash_unset(msrc->mfes_exts, path_index);
474 pool_put(mfib_path_ext_pool, path_ext);
477 typedef struct mfib_entry_collect_forwarding_ctx_t_
479 load_balance_path_t * next_hops;
480 fib_forward_chain_type_t fct;
481 mfib_entry_src_t *msrc;
482 } mfib_entry_collect_forwarding_ctx_t;
484 static fib_path_list_walk_rc_t
485 mfib_entry_src_collect_forwarding (fib_node_index_t pl_index,
486 fib_node_index_t path_index,
489 mfib_entry_collect_forwarding_ctx_t *ctx;
490 load_balance_path_t *nh;
495 * if the path is not resolved, don't include it.
497 if (!fib_path_is_resolved(path_index))
499 return (FIB_PATH_LIST_WALK_CONTINUE);
503 * If the path is not forwarding to use it
505 mfib_path_ext_t *path_ext;
507 path_ext = mfib_entry_path_ext_find(ctx->msrc->mfes_exts,
510 if (NULL != path_ext &&
511 !(path_ext->mfpe_flags & MFIB_ITF_FLAG_FORWARD))
513 return (FIB_PATH_LIST_WALK_CONTINUE);
518 case FIB_FORW_CHAIN_TYPE_MCAST_IP4:
519 case FIB_FORW_CHAIN_TYPE_MCAST_IP6:
521 * EOS traffic with no label to stack, we need the IP Adj
523 vec_add2(ctx->next_hops, nh, 1);
525 nh->path_index = path_index;
526 nh->path_weight = fib_path_get_weight(path_index);
527 fib_path_contribute_forwarding(path_index, ctx->fct, &nh->path_dpo);
530 case FIB_FORW_CHAIN_TYPE_UNICAST_IP4:
531 case FIB_FORW_CHAIN_TYPE_UNICAST_IP6:
532 case FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS:
533 case FIB_FORW_CHAIN_TYPE_MPLS_EOS:
534 case FIB_FORW_CHAIN_TYPE_ETHERNET:
535 case FIB_FORW_CHAIN_TYPE_NSH:
536 case FIB_FORW_CHAIN_TYPE_BIER:
541 return (FIB_PATH_LIST_WALK_CONTINUE);
545 mfib_entry_stack (mfib_entry_t *mfib_entry,
546 mfib_entry_src_t *msrc)
550 dp = fib_proto_to_dpo(mfib_entry_get_proto(mfib_entry));
553 * unlink the enty from the previous path list.
555 if (FIB_NODE_INDEX_INVALID != mfib_entry->mfe_pl)
557 fib_path_list_child_remove(mfib_entry->mfe_pl,
558 mfib_entry->mfe_sibling);
562 FIB_NODE_INDEX_INVALID != msrc->mfes_pl)
564 mfib_entry_collect_forwarding_ctx_t ctx = {
566 .fct = mfib_entry_get_default_chain_type(mfib_entry),
570 fib_path_list_walk(msrc->mfes_pl,
571 mfib_entry_src_collect_forwarding,
574 if (!(MFIB_ENTRY_FLAG_EXCLUSIVE & mfib_entry->mfe_flags))
576 if (NULL == ctx.next_hops)
579 * no next-hops, stack directly on the drop
581 dpo_stack(DPO_MFIB_ENTRY, dp,
582 &mfib_entry->mfe_rep,
588 * each path contirbutes a next-hop. form a replicate
589 * from those choices.
591 if (!dpo_id_is_valid(&mfib_entry->mfe_rep) ||
592 dpo_is_drop(&mfib_entry->mfe_rep))
594 dpo_id_t tmp_dpo = DPO_INVALID;
598 replicate_create(0, dp));
600 dpo_stack(DPO_MFIB_ENTRY, dp,
601 &mfib_entry->mfe_rep,
606 replicate_multipath_update(&mfib_entry->mfe_rep,
613 * for exclusive routes the source provided a replicate DPO
614 * we we stashed inthe special path list with one path
615 * so we can stack directly on that.
617 ASSERT(1 == vec_len(ctx.next_hops));
619 dpo_stack(DPO_MFIB_ENTRY, dp,
620 &mfib_entry->mfe_rep,
621 &ctx.next_hops[0].path_dpo);
622 dpo_reset(&ctx.next_hops[0].path_dpo);
623 vec_free(ctx.next_hops);
627 * link the entry to the path-list.
628 * The entry needs to be a child so that we receive the back-walk
629 * updates to recalculate forwarding.
631 mfib_entry->mfe_pl = msrc->mfes_pl;
632 mfib_entry->mfe_sibling =
633 fib_path_list_child_add(mfib_entry->mfe_pl,
634 FIB_NODE_TYPE_MFIB_ENTRY,
635 mfib_entry_get_index(mfib_entry));
639 dpo_stack(DPO_MFIB_ENTRY, dp,
640 &mfib_entry->mfe_rep,
645 static fib_node_index_t
646 mfib_entry_src_path_add (mfib_entry_src_t *msrc,
647 const fib_route_path_t *rpath)
649 fib_node_index_t path_index;
650 fib_route_path_t *rpaths;
652 ASSERT(!(MFIB_ENTRY_FLAG_EXCLUSIVE & msrc->mfes_flags));
655 * path-lists require a vector of paths
658 vec_add1(rpaths, rpath[0]);
660 if (FIB_NODE_INDEX_INVALID == msrc->mfes_pl)
662 /* A non-shared path-list */
663 msrc->mfes_pl = fib_path_list_create(FIB_PATH_LIST_FLAG_NO_URPF,
665 fib_path_list_lock(msrc->mfes_pl);
668 path_index = fib_path_list_path_add(msrc->mfes_pl, rpaths);
675 static fib_node_index_t
676 mfib_entry_src_path_remove (mfib_entry_src_t *msrc,
677 const fib_route_path_t *rpath)
679 fib_node_index_t path_index;
680 fib_route_path_t *rpaths;
682 ASSERT(!(MFIB_ENTRY_FLAG_EXCLUSIVE & msrc->mfes_flags));
685 * path-lists require a vector of paths
688 vec_add1(rpaths, rpath[0]);
690 path_index = fib_path_list_path_remove(msrc->mfes_pl, rpaths);
698 mfib_entry_recalculate_forwarding (mfib_entry_t *mfib_entry)
700 mfib_entry_src_t *bsrc;
703 * copy the forwarding data from the bast source
705 bsrc = mfib_entry_get_best_src(mfib_entry);
709 mfib_entry->mfe_flags = bsrc->mfes_flags;
710 mfib_entry->mfe_itfs = bsrc->mfes_itfs;
711 mfib_entry->mfe_rpf_id = bsrc->mfes_rpf_id;
714 mfib_entry_stack(mfib_entry, bsrc);
719 mfib_entry_create (u32 fib_index,
720 mfib_source_t source,
721 const mfib_prefix_t *prefix,
723 mfib_entry_flags_t entry_flags)
725 fib_node_index_t mfib_entry_index;
726 mfib_entry_t *mfib_entry;
727 mfib_entry_src_t *msrc;
729 mfib_entry = mfib_entry_alloc(fib_index, prefix,
731 msrc = mfib_entry_src_find_or_create(mfib_entry, source);
732 msrc->mfes_flags = entry_flags;
733 msrc->mfes_rpf_id = rpf_id;
735 mfib_entry_recalculate_forwarding(mfib_entry);
737 return (mfib_entry_index);
741 mfib_entry_ok_for_delete (mfib_entry_t *mfib_entry)
743 return (0 == vec_len(mfib_entry->mfe_srcs));
747 mfib_entry_src_ok_for_delete (const mfib_entry_src_t *msrc)
749 return ((MFIB_ENTRY_FLAG_NONE == msrc->mfes_flags &&
750 0 == fib_path_list_get_n_paths(msrc->mfes_pl)));
754 mfib_entry_update (fib_node_index_t mfib_entry_index,
755 mfib_source_t source,
756 mfib_entry_flags_t entry_flags,
760 mfib_entry_t *mfib_entry;
761 mfib_entry_src_t *msrc;
763 mfib_entry = mfib_entry_get(mfib_entry_index);
764 msrc = mfib_entry_src_find_or_create(mfib_entry, source);
765 msrc->mfes_flags = entry_flags;
766 msrc->mfes_rpf_id = rpf_id;
768 if (INDEX_INVALID != repi)
771 * The source is providing its own replicate DPO.
772 * Create a sepcial path-list to manage it, that way
773 * this entry and the source are equivalent to a normal
776 fib_node_index_t old_pl_index;
778 dpo_id_t dpo = DPO_INVALID;
780 dp = fib_proto_to_dpo(mfib_entry_get_proto(mfib_entry));
781 old_pl_index = msrc->mfes_pl;
783 dpo_set(&dpo, DPO_REPLICATE, dp, repi);
786 fib_path_list_create_special(dp,
787 FIB_PATH_LIST_FLAG_EXCLUSIVE,
791 fib_path_list_lock(msrc->mfes_pl);
792 fib_path_list_unlock(old_pl_index);
795 if (mfib_entry_src_ok_for_delete(msrc))
798 * this source has no interfaces and no flags.
799 * it has nothing left to give - remove it
801 mfib_entry_src_remove(mfib_entry, source);
804 mfib_entry_recalculate_forwarding(mfib_entry);
806 return (mfib_entry_ok_for_delete(mfib_entry));
810 mfib_entry_itf_add (mfib_entry_src_t *msrc,
814 hash_set(msrc->mfes_itfs, sw_if_index, mi);
818 mfib_entry_itf_remove (mfib_entry_src_t *msrc,
823 mfi = mfib_entry_itf_find(msrc->mfes_itfs, sw_if_index);
825 mfib_itf_delete(mfi);
827 hash_unset(msrc->mfes_itfs, sw_if_index);
831 mfib_entry_path_update (fib_node_index_t mfib_entry_index,
832 mfib_source_t source,
833 const fib_route_path_t *rpath,
834 mfib_itf_flags_t itf_flags)
836 fib_node_index_t path_index;
837 mfib_path_ext_t *path_ext;
838 mfib_itf_flags_t old, new;
839 mfib_entry_t *mfib_entry;
840 mfib_entry_src_t *msrc;
842 mfib_entry = mfib_entry_get(mfib_entry_index);
843 ASSERT(NULL != mfib_entry);
844 msrc = mfib_entry_src_find_or_create(mfib_entry, source);
847 * add the path to the path-list. If it's a duplicate we'll get
848 * back the original path.
850 path_index = mfib_entry_src_path_add(msrc, rpath);
853 * find the path extension for that path
855 path_ext = mfib_entry_path_ext_find(msrc->mfes_exts, path_index);
857 if (NULL == path_ext)
859 old = MFIB_ITF_FLAG_NONE;
860 path_ext = mfib_path_ext_add(msrc, path_index, itf_flags);
864 old = path_ext->mfpe_flags;
865 path_ext->mfpe_flags = itf_flags;
869 * Has the path changed its contribution to the input interface set.
870 * Which only paths with interfaces can do...
872 if (~0 != rpath[0].frp_sw_if_index)
874 mfib_itf_t *mfib_itf;
880 if (MFIB_ITF_FLAG_NONE == new)
883 * no more interface flags on this path, remove
884 * from the data-plane set
886 mfib_entry_itf_remove(msrc, rpath[0].frp_sw_if_index);
888 else if (MFIB_ITF_FLAG_NONE == old)
891 * This interface is now contributing
893 mfib_entry_itf_add(msrc,
894 rpath[0].frp_sw_if_index,
895 mfib_itf_create(rpath[0].frp_sw_if_index,
901 * change of flag contributions
903 mfib_itf = mfib_entry_itf_find(msrc->mfes_itfs,
904 rpath[0].frp_sw_if_index);
905 /* Seen by packets inflight */
906 mfib_itf->mfi_flags = new;
911 mfib_entry_recalculate_forwarding(mfib_entry);
915 * mfib_entry_path_remove
917 * remove a path from the entry.
918 * return the mfib_entry's index if it is still present, INVALID otherwise.
921 mfib_entry_path_remove (fib_node_index_t mfib_entry_index,
922 mfib_source_t source,
923 const fib_route_path_t *rpath)
925 fib_node_index_t path_index;
926 mfib_entry_t *mfib_entry;
927 mfib_entry_src_t *msrc;
929 mfib_entry = mfib_entry_get(mfib_entry_index);
930 ASSERT(NULL != mfib_entry);
931 msrc = mfib_entry_src_find(mfib_entry, source, NULL);
936 * there are no paths left for this source
938 return (mfib_entry_ok_for_delete(mfib_entry));
942 * remove the path from the path-list. If it's not there we'll get
945 path_index = mfib_entry_src_path_remove(msrc, rpath);
947 if (FIB_NODE_INDEX_INVALID != path_index)
950 * don't need the extension, nor the interface anymore
952 mfib_path_ext_remove(msrc, path_index);
953 if (~0 != rpath[0].frp_sw_if_index)
955 mfib_entry_itf_remove(msrc, rpath[0].frp_sw_if_index);
959 if (mfib_entry_src_ok_for_delete(msrc))
962 * this source has no interfaces and no flags.
963 * it has nothing left to give - remove it
965 mfib_entry_src_remove(mfib_entry, source);
968 mfib_entry_recalculate_forwarding(mfib_entry);
970 return (mfib_entry_ok_for_delete(mfib_entry));
976 * The source is withdrawing all the paths it provided
979 mfib_entry_delete (fib_node_index_t mfib_entry_index,
980 mfib_source_t source)
982 mfib_entry_t *mfib_entry;
984 mfib_entry = mfib_entry_get(mfib_entry_index);
985 mfib_entry_src_remove(mfib_entry, source);
987 mfib_entry_recalculate_forwarding(mfib_entry);
989 return (mfib_entry_ok_for_delete(mfib_entry));
993 fib_ip4_address_compare (ip4_address_t * a1,
997 * IP addresses are unsiged ints. the return value here needs to be signed
998 * a simple subtraction won't cut it.
999 * If the addresses are the same, the sort order is undefiend, so phoey.
1001 return ((clib_net_to_host_u32(a1->data_u32) >
1002 clib_net_to_host_u32(a2->data_u32) ) ?
1007 fib_ip6_address_compare (ip6_address_t * a1,
1011 for (i = 0; i < ARRAY_LEN (a1->as_u16); i++)
1013 int cmp = (clib_net_to_host_u16 (a1->as_u16[i]) -
1014 clib_net_to_host_u16 (a2->as_u16[i]));
1022 mfib_entry_cmp (fib_node_index_t mfib_entry_index1,
1023 fib_node_index_t mfib_entry_index2)
1025 mfib_entry_t *mfib_entry1, *mfib_entry2;
1028 mfib_entry1 = mfib_entry_get(mfib_entry_index1);
1029 mfib_entry2 = mfib_entry_get(mfib_entry_index2);
1031 switch (mfib_entry1->mfe_prefix.fp_proto)
1033 case FIB_PROTOCOL_IP4:
1034 cmp = fib_ip4_address_compare(&mfib_entry1->mfe_prefix.fp_grp_addr.ip4,
1035 &mfib_entry2->mfe_prefix.fp_grp_addr.ip4);
1039 cmp = fib_ip4_address_compare(&mfib_entry1->mfe_prefix.fp_src_addr.ip4,
1040 &mfib_entry2->mfe_prefix.fp_src_addr.ip4);
1043 case FIB_PROTOCOL_IP6:
1044 cmp = fib_ip6_address_compare(&mfib_entry1->mfe_prefix.fp_grp_addr.ip6,
1045 &mfib_entry2->mfe_prefix.fp_grp_addr.ip6);
1049 cmp = fib_ip6_address_compare(&mfib_entry1->mfe_prefix.fp_src_addr.ip6,
1050 &mfib_entry2->mfe_prefix.fp_src_addr.ip6);
1053 case FIB_PROTOCOL_MPLS:
1060 cmp = (mfib_entry1->mfe_prefix.fp_len - mfib_entry2->mfe_prefix.fp_len);
1066 mfib_entry_cmp_for_sort (void *i1, void *i2)
1068 fib_node_index_t *mfib_entry_index1 = i1, *mfib_entry_index2 = i2;
1070 return (mfib_entry_cmp(*mfib_entry_index1,
1071 *mfib_entry_index2));
1075 mfib_entry_last_lock_gone (fib_node_t *node)
1077 mfib_entry_t *mfib_entry;
1078 mfib_entry_src_t *msrc;
1080 mfib_entry = mfib_entry_from_fib_node(node);
1082 dpo_reset(&mfib_entry->mfe_rep);
1084 MFIB_ENTRY_DBG(mfib_entry, "last-lock");
1086 vec_foreach(msrc, mfib_entry->mfe_srcs)
1088 mfib_entry_src_flush(msrc);
1091 vec_free(mfib_entry->mfe_srcs);
1093 fib_node_deinit(&mfib_entry->mfe_node);
1094 pool_put(mfib_entry_pool, mfib_entry);
1098 * mfib_entry_back_walk_notify
1100 * A back walk has reach this entry.
1102 static fib_node_back_walk_rc_t
1103 mfib_entry_back_walk_notify (fib_node_t *node,
1104 fib_node_back_walk_ctx_t *ctx)
1106 mfib_entry_recalculate_forwarding(mfib_entry_from_fib_node(node));
1108 return (FIB_NODE_BACK_WALK_CONTINUE);
1112 mfib_entry_show_memory (void)
1114 fib_show_memory_usage("multicast-Entry",
1115 pool_elts(mfib_entry_pool),
1116 pool_len(mfib_entry_pool),
1117 sizeof(mfib_entry_t));
1121 * The MFIB entry's graph node virtual function table
1123 static const fib_node_vft_t mfib_entry_vft = {
1124 .fnv_get = mfib_entry_get_node,
1125 .fnv_last_lock = mfib_entry_last_lock_gone,
1126 .fnv_back_walk = mfib_entry_back_walk_notify,
1127 .fnv_mem_show = mfib_entry_show_memory,
1131 mfib_entry_lock (fib_node_index_t mfib_entry_index)
1133 mfib_entry_t *mfib_entry;
1135 mfib_entry = mfib_entry_get(mfib_entry_index);
1137 fib_node_lock(&mfib_entry->mfe_node);
1141 mfib_entry_unlock (fib_node_index_t mfib_entry_index)
1143 mfib_entry_t *mfib_entry;
1145 mfib_entry = mfib_entry_get(mfib_entry_index);
1147 fib_node_unlock(&mfib_entry->mfe_node);
1151 mfib_entry_dpo_lock (dpo_id_t *dpo)
1155 mfib_entry_dpo_unlock (dpo_id_t *dpo)
1159 const static dpo_vft_t mfib_entry_dpo_vft = {
1160 .dv_lock = mfib_entry_dpo_lock,
1161 .dv_unlock = mfib_entry_dpo_unlock,
1162 .dv_format = format_mfib_entry_dpo,
1163 .dv_mem_show = mfib_entry_show_memory,
1166 const static char* const mfib_entry_ip4_nodes[] =
1168 "ip4-mfib-forward-rpf",
1171 const static char* const mfib_entry_ip6_nodes[] =
1173 "ip6-mfib-forward-rpf",
1177 const static char* const * const mfib_entry_nodes[DPO_PROTO_NUM] =
1179 [DPO_PROTO_IP4] = mfib_entry_ip4_nodes,
1180 [DPO_PROTO_IP6] = mfib_entry_ip6_nodes,
1184 mfib_entry_module_init (void)
1186 fib_node_register_type (FIB_NODE_TYPE_MFIB_ENTRY, &mfib_entry_vft);
1187 dpo_register(DPO_MFIB_ENTRY, &mfib_entry_dpo_vft, mfib_entry_nodes);
1191 mfib_entry_encode (fib_node_index_t mfib_entry_index,
1192 fib_route_path_encode_t **api_rpaths)
1194 mfib_entry_t *mfib_entry;
1195 mfib_entry_src_t *bsrc;
1197 mfib_entry = mfib_entry_get(mfib_entry_index);
1198 bsrc = mfib_entry_get_best_src(mfib_entry);
1200 if (FIB_NODE_INDEX_INVALID != bsrc->mfes_pl)
1202 fib_path_list_walk(bsrc->mfes_pl,
1210 mfib_entry_get_prefix (fib_node_index_t mfib_entry_index,
1213 mfib_entry_t *mfib_entry;
1215 mfib_entry = mfib_entry_get(mfib_entry_index);
1216 *pfx = mfib_entry->mfe_prefix;
1220 mfib_entry_get_fib_index (fib_node_index_t mfib_entry_index)
1222 mfib_entry_t *mfib_entry;
1224 mfib_entry = mfib_entry_get(mfib_entry_index);
1226 return (mfib_entry->mfe_fib_index);
1230 mfib_entry_contribute_forwarding (fib_node_index_t mfib_entry_index,
1231 fib_forward_chain_type_t type,
1235 * An IP mFIB entry can only provide a forwarding chain that
1236 * is the same IP proto as the prefix.
1237 * No use-cases (i know of) for other combinations.
1239 mfib_entry_t *mfib_entry;
1242 mfib_entry = mfib_entry_get(mfib_entry_index);
1244 dp = fib_proto_to_dpo(mfib_entry->mfe_prefix.fp_proto);
1246 if (type == fib_forw_chain_type_from_dpo_proto(dp))
1248 dpo_copy(dpo, &mfib_entry->mfe_rep);
1252 dpo_copy(dpo, drop_dpo_get(dp));
1257 mfib_entry_pool_size (void)
1259 return (pool_elts(mfib_entry_pool));
1262 static clib_error_t *
1263 show_mfib_entry_command (vlib_main_t * vm,
1264 unformat_input_t * input,
1265 vlib_cli_command_t * cmd)
1267 fib_node_index_t fei;
1269 if (unformat (input, "%d", &fei))
1272 * show one in detail
1274 if (!pool_is_free_index(mfib_entry_pool, fei))
1276 vlib_cli_output (vm, "%d@%U",
1278 format_mfib_entry, fei,
1279 MFIB_ENTRY_FORMAT_DETAIL2);
1283 vlib_cli_output (vm, "entry %d invalid", fei);
1291 vlib_cli_output (vm, "FIB Entries:");
1292 pool_foreach_index(fei, mfib_entry_pool,
1294 vlib_cli_output (vm, "%d@%U",
1296 format_mfib_entry, fei,
1297 MFIB_ENTRY_FORMAT_BRIEF);
1305 * This commnad displays an entry, or all entries, in the mfib tables indexed by their unique
1306 * numerical indentifier.
1308 VLIB_CLI_COMMAND (show_mfib_entry, static) = {
1309 .path = "show mfib entry",
1310 .function = show_mfib_entry_command,
1311 .short_help = "show mfib entry",