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>
17 #include <vnet/vnet.h>
18 #include <vnet/ip/format.h>
19 #include <vnet/ip/ip.h>
20 #include <vnet/dpo/drop_dpo.h>
21 #include <vnet/dpo/receive_dpo.h>
22 #include <vnet/dpo/load_balance_map.h>
23 #include <vnet/dpo/lookup_dpo.h>
24 #include <vnet/dpo/interface_rx_dpo.h>
25 #include <vnet/dpo/mpls_disposition.h>
26 #include <vnet/dpo/dvr_dpo.h>
27 #include <vnet/dpo/ip_null_dpo.h>
28 #include <vnet/dpo/classify_dpo.h>
29 #include <vnet/dpo/pw_cw.h>
31 #include <vnet/adj/adj.h>
32 #include <vnet/adj/adj_mcast.h>
34 #include <vnet/fib/fib_path.h>
35 #include <vnet/fib/fib_node.h>
36 #include <vnet/fib/fib_table.h>
37 #include <vnet/fib/fib_entry.h>
38 #include <vnet/fib/fib_path_list.h>
39 #include <vnet/fib/fib_internal.h>
40 #include <vnet/fib/fib_urpf_list.h>
41 #include <vnet/fib/mpls_fib.h>
42 #include <vnet/fib/fib_path_ext.h>
43 #include <vnet/udp/udp_encap.h>
44 #include <vnet/bier/bier_fmask.h>
45 #include <vnet/bier/bier_table.h>
46 #include <vnet/bier/bier_imp.h>
47 #include <vnet/bier/bier_disp_table.h>
50 * Enurmeration of path types
52 typedef enum fib_path_type_t_ {
54 * Marker. Add new types after this one.
56 FIB_PATH_TYPE_FIRST = 0,
58 * Attached-nexthop. An interface and a nexthop are known.
60 FIB_PATH_TYPE_ATTACHED_NEXT_HOP = FIB_PATH_TYPE_FIRST,
62 * attached. Only the interface is known.
64 FIB_PATH_TYPE_ATTACHED,
66 * recursive. Only the next-hop is known.
68 FIB_PATH_TYPE_RECURSIVE,
70 * special. nothing is known. so we drop.
72 FIB_PATH_TYPE_SPECIAL,
74 * exclusive. user provided adj.
76 FIB_PATH_TYPE_EXCLUSIVE,
78 * deag. Link to a lookup adj in the next table
84 FIB_PATH_TYPE_INTF_RX,
86 * Path resolves via a UDP encap object.
88 FIB_PATH_TYPE_UDP_ENCAP,
90 * receive. it's for-us.
92 FIB_PATH_TYPE_RECEIVE,
94 * bier-imp. it's via a BIER imposition.
96 FIB_PATH_TYPE_BIER_IMP,
98 * bier-fmask. it's via a BIER ECMP-table.
100 FIB_PATH_TYPE_BIER_TABLE,
102 * bier-fmask. it's via a BIER f-mask.
104 FIB_PATH_TYPE_BIER_FMASK,
109 } __attribute__ ((packed)) fib_path_type_t;
111 #define FIB_PATH_TYPES { \
112 [FIB_PATH_TYPE_ATTACHED_NEXT_HOP] = "attached-nexthop", \
113 [FIB_PATH_TYPE_ATTACHED] = "attached", \
114 [FIB_PATH_TYPE_RECURSIVE] = "recursive", \
115 [FIB_PATH_TYPE_SPECIAL] = "special", \
116 [FIB_PATH_TYPE_EXCLUSIVE] = "exclusive", \
117 [FIB_PATH_TYPE_DEAG] = "deag", \
118 [FIB_PATH_TYPE_INTF_RX] = "intf-rx", \
119 [FIB_PATH_TYPE_UDP_ENCAP] = "udp-encap", \
120 [FIB_PATH_TYPE_RECEIVE] = "receive", \
121 [FIB_PATH_TYPE_BIER_IMP] = "bier-imp", \
122 [FIB_PATH_TYPE_BIER_TABLE] = "bier-table", \
123 [FIB_PATH_TYPE_BIER_FMASK] = "bier-fmask", \
124 [FIB_PATH_TYPE_DVR] = "dvr", \
128 * Enurmeration of path operational (i.e. derived) attributes
130 typedef enum fib_path_oper_attribute_t_ {
132 * Marker. Add new types after this one.
134 FIB_PATH_OPER_ATTRIBUTE_FIRST = 0,
136 * The path forms part of a recursive loop.
138 FIB_PATH_OPER_ATTRIBUTE_RECURSIVE_LOOP = FIB_PATH_OPER_ATTRIBUTE_FIRST,
140 * The path is resolved
142 FIB_PATH_OPER_ATTRIBUTE_RESOLVED,
144 * The path has become a permanent drop.
146 FIB_PATH_OPER_ATTRIBUTE_DROP,
148 * Marker. Add new types before this one, then update it.
150 FIB_PATH_OPER_ATTRIBUTE_LAST = FIB_PATH_OPER_ATTRIBUTE_DROP,
151 } __attribute__ ((packed)) fib_path_oper_attribute_t;
154 * The maximum number of path operational attributes
156 #define FIB_PATH_OPER_ATTRIBUTE_MAX (FIB_PATH_OPER_ATTRIBUTE_LAST + 1)
158 #define FIB_PATH_OPER_ATTRIBUTES { \
159 [FIB_PATH_OPER_ATTRIBUTE_RECURSIVE_LOOP] = "recursive-loop", \
160 [FIB_PATH_OPER_ATTRIBUTE_RESOLVED] = "resolved", \
161 [FIB_PATH_OPER_ATTRIBUTE_DROP] = "drop", \
164 #define FOR_EACH_FIB_PATH_OPER_ATTRIBUTE(_item) \
165 for (_item = FIB_PATH_OPER_ATTRIBUTE_FIRST; \
166 _item <= FIB_PATH_OPER_ATTRIBUTE_LAST; \
170 * Path flags from the attributes
172 typedef enum fib_path_oper_flags_t_ {
173 FIB_PATH_OPER_FLAG_NONE = 0,
174 FIB_PATH_OPER_FLAG_RECURSIVE_LOOP = (1 << FIB_PATH_OPER_ATTRIBUTE_RECURSIVE_LOOP),
175 FIB_PATH_OPER_FLAG_DROP = (1 << FIB_PATH_OPER_ATTRIBUTE_DROP),
176 FIB_PATH_OPER_FLAG_RESOLVED = (1 << FIB_PATH_OPER_ATTRIBUTE_RESOLVED),
177 } __attribute__ ((packed)) fib_path_oper_flags_t;
182 typedef struct fib_path_t_ {
184 * A path is a node in the FIB graph.
189 * The index of the path-list to which this path belongs
194 * This marks the start of the memory area used to hash
197 STRUCT_MARK(path_hash_start);
200 * Configuration Flags
202 fib_path_cfg_flags_t fp_cfg_flags;
205 * The type of the path. This is the selector for the union
207 fib_path_type_t fp_type;
210 * The protocol of the next-hop, i.e. the address family of the
211 * next-hop's address. We can't derive this from the address itself
212 * since the address can be all zeros
214 dpo_proto_t fp_nh_proto;
217 * UCMP [unnormalised] weigth
222 * A path preference. 0 is the best.
223 * Only paths of the best preference, that are 'up', are considered
229 * per-type union of the data required to resolve the path
236 ip46_address_t fp_nh;
244 * The Connected local address
246 fib_prefix_t fp_connected;
258 ip46_address_t fp_ip;
261 * The local label to resolve through.
263 mpls_label_t fp_local_label;
265 * The EOS bit of the resolving label
267 mpls_eos_bit_t fp_eos;
271 * The FIB table index in which to find the next-hop.
273 fib_node_index_t fp_tbl_id;
279 index_t fp_bier_fmask;
283 * The BIER table's ID
285 bier_table_id_t fp_bier_tbl;
289 * The BIER imposition object
290 * this is part of the path's key, since the index_t
291 * of an imposition object is the object's key.
297 * The FIB index in which to perfom the next lookup
299 fib_node_index_t fp_tbl_id;
301 * The RPF-ID to tag the packets with
303 fib_rpf_id_t fp_rpf_id;
309 * The user provided 'exclusive' DPO
315 * The interface on which the local address is configured
321 ip46_address_t fp_addr;
325 * The interface on which the packets will be input.
331 * The UDP Encap object this path resolves through
337 * The UDP Encap object this path resolves through
339 u32 fp_classify_table_id;
348 STRUCT_MARK(path_hash_end);
351 * Members in this last section represent information that is
352 * dervied during resolution. It should not be copied to new paths
359 fib_path_oper_flags_t fp_oper_flags;
363 * the resolving via fib. not part of the union, since it it not part
364 * of the path's hash.
366 fib_node_index_t fp_via_fib;
368 * the resolving bier-table
370 index_t fp_via_bier_tbl;
372 * the resolving bier-fmask
374 index_t fp_via_bier_fmask;
378 * The Data-path objects through which this path resolves for IP.
383 * the index of this path in the parent's child list.
389 * Array of strings/names for the path types and attributes
391 static const char *fib_path_type_names[] = FIB_PATH_TYPES;
392 static const char *fib_path_oper_attribute_names[] = FIB_PATH_OPER_ATTRIBUTES;
393 static const char *fib_path_cfg_attribute_names[] = FIB_PATH_CFG_ATTRIBUTES;
396 * The memory pool from which we allocate all the paths
398 static fib_path_t *fib_path_pool;
403 vlib_log_class_t fib_path_logger;
408 #define FIB_PATH_DBG(_p, _fmt, _args...) \
410 vlib_log_debug (fib_path_logger, \
412 format_fib_path, fib_path_get_index(_p), 0, \
413 FIB_PATH_FORMAT_FLAGS_ONE_LINE, \
418 fib_path_get (fib_node_index_t index)
420 return (pool_elt_at_index(fib_path_pool, index));
423 static fib_node_index_t
424 fib_path_get_index (fib_path_t *path)
426 return (path - fib_path_pool);
430 fib_path_get_node (fib_node_index_t index)
432 return ((fib_node_t*)fib_path_get(index));
436 fib_path_from_fib_node (fib_node_t *node)
438 ASSERT(FIB_NODE_TYPE_PATH == node->fn_type);
439 return ((fib_path_t*)node);
443 format_fib_path (u8 * s, va_list * args)
445 fib_node_index_t path_index = va_arg (*args, fib_node_index_t);
446 u32 indent = va_arg (*args, u32);
447 fib_format_path_flags_t flags = va_arg (*args, fib_format_path_flags_t);
448 vnet_main_t * vnm = vnet_get_main();
449 fib_path_oper_attribute_t oattr;
450 fib_path_cfg_attribute_t cattr;
454 if (flags & FIB_PATH_FORMAT_FLAGS_ONE_LINE)
463 path = fib_path_get(path_index);
465 s = format (s, "%Upath:[%d] ", format_white_space, indent,
466 fib_path_get_index(path));
467 s = format (s, "pl-index:%d ", path->fp_pl_index);
468 s = format (s, "%U ", format_dpo_proto, path->fp_nh_proto);
469 s = format (s, "weight=%d ", path->fp_weight);
470 s = format (s, "pref=%d ", path->fp_preference);
471 s = format (s, "%s: ", fib_path_type_names[path->fp_type]);
472 if (FIB_PATH_OPER_FLAG_NONE != path->fp_oper_flags) {
473 s = format(s, " oper-flags:");
474 FOR_EACH_FIB_PATH_OPER_ATTRIBUTE(oattr) {
475 if ((1<<oattr) & path->fp_oper_flags) {
476 s = format (s, "%s,", fib_path_oper_attribute_names[oattr]);
480 if (FIB_PATH_CFG_FLAG_NONE != path->fp_cfg_flags) {
481 s = format(s, " cfg-flags:");
482 FOR_EACH_FIB_PATH_CFG_ATTRIBUTE(cattr) {
483 if ((1<<cattr) & path->fp_cfg_flags) {
484 s = format (s, "%s,", fib_path_cfg_attribute_names[cattr]);
488 if (!(flags & FIB_PATH_FORMAT_FLAGS_ONE_LINE))
489 s = format(s, "\n%U", format_white_space, indent+2);
491 switch (path->fp_type)
493 case FIB_PATH_TYPE_ATTACHED_NEXT_HOP:
494 s = format (s, "%U", format_ip46_address,
495 &path->attached_next_hop.fp_nh,
497 if (path->fp_oper_flags & FIB_PATH_OPER_FLAG_DROP)
499 s = format (s, " if_index:%d", path->attached_next_hop.fp_interface);
503 s = format (s, " %U",
504 format_vnet_sw_interface_name,
506 vnet_get_sw_interface(
508 path->attached_next_hop.fp_interface));
509 if (vnet_sw_interface_is_p2p(vnet_get_main(),
510 path->attached_next_hop.fp_interface))
512 s = format (s, " (p2p)");
515 if (!dpo_id_is_valid(&path->fp_dpo))
517 s = format(s, "%s%Uunresolved", eol, format_white_space, indent+2);
521 s = format(s, "%s%U%U", eol,
522 format_white_space, indent,
527 case FIB_PATH_TYPE_ATTACHED:
528 if (path->fp_oper_flags & FIB_PATH_OPER_FLAG_DROP)
530 s = format (s, "if_index:%d", path->attached_next_hop.fp_interface);
534 s = format (s, " %U",
535 format_vnet_sw_interface_name,
537 vnet_get_sw_interface(
539 path->attached.fp_interface));
542 case FIB_PATH_TYPE_RECURSIVE:
543 if (DPO_PROTO_MPLS == path->fp_nh_proto)
545 s = format (s, "via %U %U",
546 format_mpls_unicast_label,
547 path->recursive.fp_nh.fp_local_label,
549 path->recursive.fp_nh.fp_eos);
553 s = format (s, "via %U",
555 &path->recursive.fp_nh.fp_ip,
558 s = format (s, " in fib:%d",
559 path->recursive.fp_tbl_id,
561 s = format (s, " via-fib:%d", path->fp_via_fib);
562 s = format (s, " via-dpo:[%U:%d]",
563 format_dpo_type, path->fp_dpo.dpoi_type,
564 path->fp_dpo.dpoi_index);
567 case FIB_PATH_TYPE_UDP_ENCAP:
568 s = format (s, "UDP-encap ID:%d", path->udp_encap.fp_udp_encap_id);
570 case FIB_PATH_TYPE_BIER_TABLE:
571 s = format (s, "via bier-table:[%U}",
572 format_bier_table_id,
573 &path->bier_table.fp_bier_tbl);
574 s = format (s, " via-dpo:[%U:%d]",
575 format_dpo_type, path->fp_dpo.dpoi_type,
576 path->fp_dpo.dpoi_index);
578 case FIB_PATH_TYPE_BIER_FMASK:
579 s = format (s, "via-fmask:%d", path->bier_fmask.fp_bier_fmask);
580 s = format (s, " via-dpo:[%U:%d]",
581 format_dpo_type, path->fp_dpo.dpoi_type,
582 path->fp_dpo.dpoi_index);
584 case FIB_PATH_TYPE_BIER_IMP:
585 s = format (s, "via %U", format_bier_imp,
586 path->bier_imp.fp_bier_imp, 0, BIER_SHOW_BRIEF);
588 case FIB_PATH_TYPE_DVR:
589 s = format (s, " %U",
590 format_vnet_sw_interface_name,
592 vnet_get_sw_interface(
594 path->dvr.fp_interface));
596 case FIB_PATH_TYPE_DEAG:
597 s = format (s, " %sfib-index:%d",
598 (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_RPF_ID ? "m" : ""),
599 path->deag.fp_tbl_id);
601 case FIB_PATH_TYPE_RECEIVE:
602 case FIB_PATH_TYPE_INTF_RX:
603 case FIB_PATH_TYPE_SPECIAL:
604 case FIB_PATH_TYPE_EXCLUSIVE:
605 if (dpo_id_is_valid(&path->fp_dpo))
607 s = format(s, "%U", format_dpo_id,
608 &path->fp_dpo, indent+2);
616 * fib_path_last_lock_gone
618 * We don't share paths, we share path lists, so the [un]lock functions
622 fib_path_last_lock_gone (fib_node_t *node)
628 fib_path_attached_next_hop_get_adj (fib_path_t *path,
632 fib_node_index_t fib_path_index;
633 fib_protocol_t nh_proto;
636 fib_path_index = fib_path_get_index(path);
637 nh_proto = dpo_proto_to_fib(path->fp_nh_proto);
639 if (vnet_sw_interface_is_p2p(vnet_get_main(),
640 path->attached_next_hop.fp_interface))
643 * if the interface is p2p then the adj for the specific
644 * neighbour on that link will never exist. on p2p links
645 * the subnet address (the attached route) links to the
646 * auto-adj (see below), we want that adj here too.
648 ai = adj_nbr_add_or_lock(nh_proto, link, &zero_addr,
649 path->attached_next_hop.fp_interface);
653 ai = adj_nbr_add_or_lock(nh_proto, link,
654 &path->attached_next_hop.fp_nh,
655 path->attached_next_hop.fp_interface);
658 dpo_set(dpo, DPO_ADJACENCY, vnet_link_to_dpo_proto(link), ai);
661 return (fib_path_get(fib_path_index));
665 fib_path_attached_next_hop_set (fib_path_t *path)
668 * resolve directly via the adjacency discribed by the
669 * interface and next-hop
671 path = fib_path_attached_next_hop_get_adj(path,
672 dpo_proto_to_link(path->fp_nh_proto),
675 ASSERT(dpo_is_adj(&path->fp_dpo));
678 * become a child of the adjacency so we receive updates
679 * when its rewrite changes
681 path->fp_sibling = adj_child_add(path->fp_dpo.dpoi_index,
683 fib_path_get_index(path));
685 if (!vnet_sw_interface_is_up(vnet_get_main(),
686 path->attached_next_hop.fp_interface) ||
687 !adj_is_up(path->fp_dpo.dpoi_index))
689 path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED;
694 fib_path_attached_get_adj (fib_path_t *path,
698 fib_protocol_t nh_proto;
700 nh_proto = dpo_proto_to_fib(path->fp_nh_proto);
702 if (vnet_sw_interface_is_p2p(vnet_get_main(),
703 path->attached.fp_interface))
706 * point-2-point interfaces do not require a glean, since
707 * there is nothing to ARP. Install a rewrite/nbr adj instead
711 ai = adj_nbr_add_or_lock(nh_proto, link, &zero_addr,
712 path->attached.fp_interface);
714 dpo_set(dpo, DPO_ADJACENCY, vnet_link_to_dpo_proto(link), ai);
717 else if (vnet_sw_interface_is_nbma(vnet_get_main(),
718 path->attached.fp_interface))
720 dpo_copy(dpo, drop_dpo_get(path->fp_nh_proto));
726 ai = adj_glean_add_or_lock(nh_proto, link,
727 path->attached.fp_interface,
728 &path->attached.fp_connected);
729 dpo_set(dpo, DPO_ADJACENCY_GLEAN, vnet_link_to_dpo_proto(link), ai);
735 * create of update the paths recursive adj
738 fib_path_recursive_adj_update (fib_path_t *path,
739 fib_forward_chain_type_t fct,
742 dpo_id_t via_dpo = DPO_INVALID;
745 * get the DPO to resolve through from the via-entry
747 fib_entry_contribute_forwarding(path->fp_via_fib,
753 * hope for the best - clear if restrictions apply.
755 path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RESOLVED;
758 * Validate any recursion constraints and over-ride the via
761 if (path->fp_oper_flags & FIB_PATH_OPER_FLAG_RECURSIVE_LOOP)
763 path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED;
764 dpo_copy(&via_dpo, drop_dpo_get(path->fp_nh_proto));
766 else if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_RESOLVE_HOST)
769 * the via FIB must be a host route.
770 * note the via FIB just added will always be a host route
771 * since it is an RR source added host route. So what we need to
772 * check is whether the route has other sources. If it does then
773 * some other source has added it as a host route. If it doesn't
774 * then it was added only here and inherits forwarding from a cover.
775 * the cover is not a host route.
776 * The RR source is the lowest priority source, so we check if it
777 * is the best. if it is there are no other sources.
779 if (fib_entry_get_best_source(path->fp_via_fib) >= FIB_SOURCE_RR)
781 path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED;
782 dpo_copy(&via_dpo, drop_dpo_get(path->fp_nh_proto));
785 * PIC edge trigger. let the load-balance maps know
787 load_balance_map_path_state_change(fib_path_get_index(path));
790 else if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_RESOLVE_ATTACHED)
793 * RR source entries inherit the flags from the cover, so
794 * we can check the via directly
796 if (!(FIB_ENTRY_FLAG_ATTACHED & fib_entry_get_flags(path->fp_via_fib)))
798 path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED;
799 dpo_copy(&via_dpo, drop_dpo_get(path->fp_nh_proto));
802 * PIC edge trigger. let the load-balance maps know
804 load_balance_map_path_state_change(fib_path_get_index(path));
808 * check for over-riding factors on the FIB entry itself
810 if (!fib_entry_is_resolved(path->fp_via_fib))
812 path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED;
813 dpo_copy(&via_dpo, drop_dpo_get(path->fp_nh_proto));
816 * PIC edge trigger. let the load-balance maps know
818 load_balance_map_path_state_change(fib_path_get_index(path));
822 * If this path is contributing a drop, then it's not resolved
824 if (dpo_is_drop(&via_dpo) || load_balance_is_drop(&via_dpo))
826 path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED;
830 * update the path's contributed DPO
832 dpo_copy(dpo, &via_dpo);
834 FIB_PATH_DBG(path, "recursive update:");
840 * re-evaulate the forwarding state for a via fmask path
843 fib_path_bier_fmask_update (fib_path_t *path,
846 bier_fmask_contribute_forwarding(path->bier_fmask.fp_bier_fmask, dpo);
849 * if we are stakcing on the drop, then the path is not resolved
851 if (dpo_is_drop(dpo))
853 path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED;
857 path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RESOLVED;
862 * fib_path_is_permanent_drop
864 * Return !0 if the path is configured to permanently drop,
865 * despite other attributes.
868 fib_path_is_permanent_drop (fib_path_t *path)
870 return ((path->fp_cfg_flags & FIB_PATH_CFG_FLAG_DROP) ||
871 (path->fp_oper_flags & FIB_PATH_OPER_FLAG_DROP));
877 * Remove our dependency on the resolution target
880 fib_path_unresolve (fib_path_t *path)
883 * the forced drop path does not need unresolving
885 if (fib_path_is_permanent_drop(path))
890 switch (path->fp_type)
892 case FIB_PATH_TYPE_RECURSIVE:
893 if (FIB_NODE_INDEX_INVALID != path->fp_via_fib)
895 fib_entry_child_remove(path->fp_via_fib,
897 fib_table_entry_special_remove(path->recursive.fp_tbl_id,
898 fib_entry_get_prefix(path->fp_via_fib),
900 fib_table_unlock(path->recursive.fp_tbl_id,
901 dpo_proto_to_fib(path->fp_nh_proto),
903 path->fp_via_fib = FIB_NODE_INDEX_INVALID;
906 case FIB_PATH_TYPE_BIER_FMASK:
907 bier_fmask_child_remove(path->fp_via_bier_fmask,
910 case FIB_PATH_TYPE_BIER_IMP:
911 bier_imp_unlock(path->fp_dpo.dpoi_index);
913 case FIB_PATH_TYPE_BIER_TABLE:
914 bier_table_ecmp_unlock(path->fp_via_bier_tbl);
916 case FIB_PATH_TYPE_ATTACHED_NEXT_HOP:
917 case FIB_PATH_TYPE_ATTACHED:
918 if (dpo_is_adj(&path->fp_dpo))
919 adj_child_remove(path->fp_dpo.dpoi_index,
922 case FIB_PATH_TYPE_UDP_ENCAP:
923 udp_encap_unlock(path->fp_dpo.dpoi_index);
925 case FIB_PATH_TYPE_EXCLUSIVE:
926 dpo_reset(&path->exclusive.fp_ex_dpo);
928 case FIB_PATH_TYPE_SPECIAL:
929 case FIB_PATH_TYPE_RECEIVE:
930 case FIB_PATH_TYPE_INTF_RX:
931 case FIB_PATH_TYPE_DEAG:
932 case FIB_PATH_TYPE_DVR:
934 * these hold only the path's DPO, which is reset below.
940 * release the adj we were holding and pick up the
943 dpo_reset(&path->fp_dpo);
944 path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED;
949 static fib_forward_chain_type_t
950 fib_path_to_chain_type (const fib_path_t *path)
952 if (DPO_PROTO_MPLS == path->fp_nh_proto)
954 if (FIB_PATH_TYPE_RECURSIVE == path->fp_type &&
955 MPLS_EOS == path->recursive.fp_nh.fp_eos)
957 return (FIB_FORW_CHAIN_TYPE_MPLS_EOS);
961 return (FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS);
966 return (fib_forw_chain_type_from_dpo_proto(path->fp_nh_proto));
971 * fib_path_back_walk_notify
973 * A back walk has reach this path.
975 static fib_node_back_walk_rc_t
976 fib_path_back_walk_notify (fib_node_t *node,
977 fib_node_back_walk_ctx_t *ctx)
981 path = fib_path_from_fib_node(node);
983 FIB_PATH_DBG(path, "bw:%U",
984 format_fib_node_bw_reason, ctx->fnbw_reason);
986 switch (path->fp_type)
988 case FIB_PATH_TYPE_RECURSIVE:
989 if (FIB_NODE_BW_REASON_FLAG_EVALUATE & ctx->fnbw_reason)
992 * modify the recursive adjacency to use the new forwarding
994 * this update is visible to packets in flight in the DP.
996 fib_path_recursive_adj_update(
998 fib_path_to_chain_type(path),
1001 if ((FIB_NODE_BW_REASON_FLAG_ADJ_UPDATE & ctx->fnbw_reason) ||
1002 (FIB_NODE_BW_REASON_FLAG_ADJ_MTU & ctx->fnbw_reason) ||
1003 (FIB_NODE_BW_REASON_FLAG_ADJ_DOWN & ctx->fnbw_reason))
1006 * ADJ updates (complete<->incomplete) do not need to propagate to
1007 * recursive entries.
1008 * The only reason its needed as far back as here, is that the adj
1009 * and the incomplete adj are a different DPO type, so the LBs need
1011 * If this walk was quashed in the fib_entry, then any non-fib_path
1012 * children (like tunnels that collapse out the LB when they stack)
1013 * would not see the update.
1015 return (FIB_NODE_BACK_WALK_CONTINUE);
1018 case FIB_PATH_TYPE_BIER_FMASK:
1019 if (FIB_NODE_BW_REASON_FLAG_EVALUATE & ctx->fnbw_reason)
1022 * update to use the BIER fmask's new forwading
1024 fib_path_bier_fmask_update(path, &path->fp_dpo);
1026 if ((FIB_NODE_BW_REASON_FLAG_ADJ_UPDATE & ctx->fnbw_reason) ||
1027 (FIB_NODE_BW_REASON_FLAG_ADJ_DOWN & ctx->fnbw_reason))
1030 * ADJ updates (complete<->incomplete) do not need to propagate to
1031 * recursive entries.
1032 * The only reason its needed as far back as here, is that the adj
1033 * and the incomplete adj are a different DPO type, so the LBs need
1035 * If this walk was quashed in the fib_entry, then any non-fib_path
1036 * children (like tunnels that collapse out the LB when they stack)
1037 * would not see the update.
1039 return (FIB_NODE_BACK_WALK_CONTINUE);
1042 case FIB_PATH_TYPE_ATTACHED_NEXT_HOP:
1045 * ADJ_UPDATE backwalk pass silently through here and up to
1046 * the path-list when the multipath adj collapse occurs.
1047 * The reason we do this is that the assumtption is that VPP
1048 * runs in an environment where the Control-Plane is remote
1049 * and hence reacts slowly to link up down. In order to remove
1050 * this down link from the ECMP set quickly, we back-walk.
1051 * VPP also has dedicated CPUs, so we are not stealing resources
1052 * from the CP to do so.
1054 if (FIB_NODE_BW_REASON_FLAG_INTERFACE_UP & ctx->fnbw_reason)
1056 if (path->fp_oper_flags & FIB_PATH_OPER_FLAG_RESOLVED)
1059 * alreday resolved. no need to walk back again
1061 return (FIB_NODE_BACK_WALK_CONTINUE);
1063 path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RESOLVED;
1065 if (FIB_NODE_BW_REASON_FLAG_INTERFACE_DOWN & ctx->fnbw_reason)
1067 if (!(path->fp_oper_flags & FIB_PATH_OPER_FLAG_RESOLVED))
1070 * alreday unresolved. no need to walk back again
1072 return (FIB_NODE_BACK_WALK_CONTINUE);
1074 path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED;
1076 if (FIB_NODE_BW_REASON_FLAG_INTERFACE_DELETE & ctx->fnbw_reason)
1079 * The interface this path resolves through has been deleted.
1080 * This will leave the path in a permanent drop state. The route
1081 * needs to be removed and readded (and hence the path-list deleted)
1082 * before it can forward again.
1084 fib_path_unresolve(path);
1085 path->fp_oper_flags |= FIB_PATH_OPER_FLAG_DROP;
1087 if (FIB_NODE_BW_REASON_FLAG_ADJ_UPDATE & ctx->fnbw_reason)
1090 * restack the DPO to pick up the correct DPO sub-type
1094 if_is_up = vnet_sw_interface_is_up(
1096 path->attached_next_hop.fp_interface);
1098 path = fib_path_attached_next_hop_get_adj(
1100 dpo_proto_to_link(path->fp_nh_proto),
1103 path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED;
1104 if (if_is_up && adj_is_up(path->fp_dpo.dpoi_index))
1106 path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RESOLVED;
1112 * If the interface is not up there is no reason to walk
1113 * back to children. if we did they would only evalute
1114 * that this path is unresolved and hence it would
1115 * not contribute the adjacency - so it would be wasted
1118 return (FIB_NODE_BACK_WALK_CONTINUE);
1121 if (FIB_NODE_BW_REASON_FLAG_ADJ_DOWN & ctx->fnbw_reason)
1123 if (!(path->fp_oper_flags & FIB_PATH_OPER_FLAG_RESOLVED))
1126 * alreday unresolved. no need to walk back again
1128 return (FIB_NODE_BACK_WALK_CONTINUE);
1131 * the adj has gone down. the path is no longer resolved.
1133 path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED;
1136 case FIB_PATH_TYPE_ATTACHED:
1137 case FIB_PATH_TYPE_DVR:
1139 * FIXME; this could schedule a lower priority walk, since attached
1140 * routes are not usually in ECMP configurations so the backwalk to
1141 * the FIB entry does not need to be high priority
1143 if (FIB_NODE_BW_REASON_FLAG_INTERFACE_UP & ctx->fnbw_reason)
1145 path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RESOLVED;
1147 if (FIB_NODE_BW_REASON_FLAG_INTERFACE_DOWN & ctx->fnbw_reason)
1149 path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED;
1151 if (FIB_NODE_BW_REASON_FLAG_INTERFACE_DELETE & ctx->fnbw_reason)
1153 fib_path_unresolve(path);
1154 path->fp_oper_flags |= FIB_PATH_OPER_FLAG_DROP;
1157 case FIB_PATH_TYPE_UDP_ENCAP:
1159 dpo_id_t via_dpo = DPO_INVALID;
1162 * hope for the best - clear if restrictions apply.
1164 path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RESOLVED;
1166 udp_encap_contribute_forwarding(path->udp_encap.fp_udp_encap_id,
1170 * If this path is contributing a drop, then it's not resolved
1172 if (dpo_is_drop(&via_dpo) || load_balance_is_drop(&via_dpo))
1174 path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED;
1178 * update the path's contributed DPO
1180 dpo_copy(&path->fp_dpo, &via_dpo);
1181 dpo_reset(&via_dpo);
1184 case FIB_PATH_TYPE_INTF_RX:
1186 case FIB_PATH_TYPE_DEAG:
1188 * FIXME When VRF delete is allowed this will need a poke.
1190 case FIB_PATH_TYPE_SPECIAL:
1191 case FIB_PATH_TYPE_RECEIVE:
1192 case FIB_PATH_TYPE_EXCLUSIVE:
1193 case FIB_PATH_TYPE_BIER_TABLE:
1194 case FIB_PATH_TYPE_BIER_IMP:
1196 * these path types have no parents. so to be
1197 * walked from one is unexpected.
1204 * propagate the backwalk further to the path-list
1206 fib_path_list_back_walk(path->fp_pl_index, ctx);
1208 return (FIB_NODE_BACK_WALK_CONTINUE);
1212 fib_path_memory_show (void)
1214 fib_show_memory_usage("Path",
1215 pool_elts(fib_path_pool),
1216 pool_len(fib_path_pool),
1217 sizeof(fib_path_t));
1221 * The FIB path's graph node virtual function table
1223 static const fib_node_vft_t fib_path_vft = {
1224 .fnv_get = fib_path_get_node,
1225 .fnv_last_lock = fib_path_last_lock_gone,
1226 .fnv_back_walk = fib_path_back_walk_notify,
1227 .fnv_mem_show = fib_path_memory_show,
1230 static fib_path_cfg_flags_t
1231 fib_path_route_flags_to_cfg_flags (const fib_route_path_t *rpath)
1233 fib_path_cfg_flags_t cfg_flags = FIB_PATH_CFG_FLAG_NONE;
1235 if (rpath->frp_flags & FIB_ROUTE_PATH_POP_PW_CW)
1236 cfg_flags |= FIB_PATH_CFG_FLAG_POP_PW_CW;
1237 if (rpath->frp_flags & FIB_ROUTE_PATH_RESOLVE_VIA_HOST)
1238 cfg_flags |= FIB_PATH_CFG_FLAG_RESOLVE_HOST;
1239 if (rpath->frp_flags & FIB_ROUTE_PATH_RESOLVE_VIA_ATTACHED)
1240 cfg_flags |= FIB_PATH_CFG_FLAG_RESOLVE_ATTACHED;
1241 if (rpath->frp_flags & FIB_ROUTE_PATH_LOCAL)
1242 cfg_flags |= FIB_PATH_CFG_FLAG_LOCAL;
1243 if (rpath->frp_flags & FIB_ROUTE_PATH_ATTACHED)
1244 cfg_flags |= FIB_PATH_CFG_FLAG_ATTACHED;
1245 if (rpath->frp_flags & FIB_ROUTE_PATH_INTF_RX)
1246 cfg_flags |= FIB_PATH_CFG_FLAG_INTF_RX;
1247 if (rpath->frp_flags & FIB_ROUTE_PATH_RPF_ID)
1248 cfg_flags |= FIB_PATH_CFG_FLAG_RPF_ID;
1249 if (rpath->frp_flags & FIB_ROUTE_PATH_EXCLUSIVE)
1250 cfg_flags |= FIB_PATH_CFG_FLAG_EXCLUSIVE;
1251 if (rpath->frp_flags & FIB_ROUTE_PATH_DROP)
1252 cfg_flags |= FIB_PATH_CFG_FLAG_DROP;
1253 if (rpath->frp_flags & FIB_ROUTE_PATH_SOURCE_LOOKUP)
1254 cfg_flags |= FIB_PATH_CFG_FLAG_DEAG_SRC;
1255 if (rpath->frp_flags & FIB_ROUTE_PATH_ICMP_UNREACH)
1256 cfg_flags |= FIB_PATH_CFG_FLAG_ICMP_UNREACH;
1257 if (rpath->frp_flags & FIB_ROUTE_PATH_ICMP_PROHIBIT)
1258 cfg_flags |= FIB_PATH_CFG_FLAG_ICMP_PROHIBIT;
1259 if (rpath->frp_flags & FIB_ROUTE_PATH_GLEAN)
1260 cfg_flags |= FIB_PATH_CFG_FLAG_GLEAN;
1268 * Create and initialise a new path object.
1269 * return the index of the path.
1272 fib_path_create (fib_node_index_t pl_index,
1273 const fib_route_path_t *rpath)
1277 pool_get(fib_path_pool, path);
1278 clib_memset(path, 0, sizeof(*path));
1280 fib_node_init(&path->fp_node,
1281 FIB_NODE_TYPE_PATH);
1283 dpo_reset(&path->fp_dpo);
1284 path->fp_pl_index = pl_index;
1285 path->fp_nh_proto = rpath->frp_proto;
1286 path->fp_via_fib = FIB_NODE_INDEX_INVALID;
1287 path->fp_weight = rpath->frp_weight;
1288 if (0 == path->fp_weight)
1291 * a weight of 0 is a meaningless value. We could either reject it, and thus force
1292 * clients to always use 1, or we can accept it and fixup approrpiately.
1294 path->fp_weight = 1;
1296 path->fp_preference = rpath->frp_preference;
1297 path->fp_cfg_flags = fib_path_route_flags_to_cfg_flags(rpath);
1300 * deduce the path's tpye from the parementers and save what is needed.
1302 if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_LOCAL)
1304 path->fp_type = FIB_PATH_TYPE_RECEIVE;
1305 path->receive.fp_interface = rpath->frp_sw_if_index;
1306 path->receive.fp_addr = rpath->frp_addr;
1308 else if (rpath->frp_flags & FIB_ROUTE_PATH_UDP_ENCAP)
1310 path->fp_type = FIB_PATH_TYPE_UDP_ENCAP;
1311 path->udp_encap.fp_udp_encap_id = rpath->frp_udp_encap_id;
1313 else if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_INTF_RX)
1315 path->fp_type = FIB_PATH_TYPE_INTF_RX;
1316 path->intf_rx.fp_interface = rpath->frp_sw_if_index;
1318 else if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_RPF_ID)
1320 path->fp_type = FIB_PATH_TYPE_DEAG;
1321 path->deag.fp_tbl_id = rpath->frp_fib_index;
1322 path->deag.fp_rpf_id = rpath->frp_rpf_id;
1324 else if (rpath->frp_flags & FIB_ROUTE_PATH_BIER_FMASK)
1326 path->fp_type = FIB_PATH_TYPE_BIER_FMASK;
1327 path->bier_fmask.fp_bier_fmask = rpath->frp_bier_fmask;
1329 else if (rpath->frp_flags & FIB_ROUTE_PATH_BIER_IMP)
1331 path->fp_type = FIB_PATH_TYPE_BIER_IMP;
1332 path->bier_imp.fp_bier_imp = rpath->frp_bier_imp;
1334 else if (rpath->frp_flags & FIB_ROUTE_PATH_BIER_TABLE)
1336 path->fp_type = FIB_PATH_TYPE_BIER_TABLE;
1337 path->bier_table.fp_bier_tbl = rpath->frp_bier_tbl;
1339 else if (rpath->frp_flags & FIB_ROUTE_PATH_DEAG)
1341 path->fp_type = FIB_PATH_TYPE_DEAG;
1342 path->deag.fp_tbl_id = rpath->frp_fib_index;
1344 else if (rpath->frp_flags & FIB_ROUTE_PATH_DVR)
1346 path->fp_type = FIB_PATH_TYPE_DVR;
1347 path->dvr.fp_interface = rpath->frp_sw_if_index;
1349 else if (rpath->frp_flags & FIB_ROUTE_PATH_EXCLUSIVE)
1351 path->fp_type = FIB_PATH_TYPE_EXCLUSIVE;
1352 dpo_copy(&path->exclusive.fp_ex_dpo, &rpath->dpo);
1354 else if ((path->fp_cfg_flags & FIB_PATH_CFG_FLAG_ICMP_PROHIBIT) ||
1355 (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_ICMP_UNREACH))
1357 path->fp_type = FIB_PATH_TYPE_SPECIAL;
1359 else if ((path->fp_cfg_flags & FIB_PATH_CFG_FLAG_CLASSIFY))
1361 path->fp_type = FIB_PATH_TYPE_SPECIAL;
1362 path->classify.fp_classify_table_id = rpath->frp_classify_table_id;
1364 else if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_GLEAN)
1366 path->fp_type = FIB_PATH_TYPE_ATTACHED;
1367 path->attached.fp_interface = rpath->frp_sw_if_index;
1368 path->attached.fp_connected = rpath->frp_connected;
1370 else if (~0 != rpath->frp_sw_if_index)
1372 if (ip46_address_is_zero(&rpath->frp_addr))
1374 path->fp_type = FIB_PATH_TYPE_ATTACHED;
1375 path->attached.fp_interface = rpath->frp_sw_if_index;
1379 path->fp_type = FIB_PATH_TYPE_ATTACHED_NEXT_HOP;
1380 path->attached_next_hop.fp_interface = rpath->frp_sw_if_index;
1381 path->attached_next_hop.fp_nh = rpath->frp_addr;
1386 if (ip46_address_is_zero(&rpath->frp_addr))
1388 if (~0 == rpath->frp_fib_index)
1390 path->fp_type = FIB_PATH_TYPE_SPECIAL;
1394 path->fp_type = FIB_PATH_TYPE_DEAG;
1395 path->deag.fp_tbl_id = rpath->frp_fib_index;
1396 path->deag.fp_rpf_id = ~0;
1401 path->fp_type = FIB_PATH_TYPE_RECURSIVE;
1402 if (DPO_PROTO_MPLS == path->fp_nh_proto)
1404 path->recursive.fp_nh.fp_local_label = rpath->frp_local_label;
1405 path->recursive.fp_nh.fp_eos = rpath->frp_eos;
1409 path->recursive.fp_nh.fp_ip = rpath->frp_addr;
1411 path->recursive.fp_tbl_id = rpath->frp_fib_index;
1415 FIB_PATH_DBG(path, "create");
1417 return (fib_path_get_index(path));
1421 * fib_path_create_special
1423 * Create and initialise a new path object.
1424 * return the index of the path.
1427 fib_path_create_special (fib_node_index_t pl_index,
1428 dpo_proto_t nh_proto,
1429 fib_path_cfg_flags_t flags,
1430 const dpo_id_t *dpo)
1434 pool_get(fib_path_pool, path);
1435 clib_memset(path, 0, sizeof(*path));
1437 fib_node_init(&path->fp_node,
1438 FIB_NODE_TYPE_PATH);
1439 dpo_reset(&path->fp_dpo);
1441 path->fp_pl_index = pl_index;
1442 path->fp_weight = 1;
1443 path->fp_preference = 0;
1444 path->fp_nh_proto = nh_proto;
1445 path->fp_via_fib = FIB_NODE_INDEX_INVALID;
1446 path->fp_cfg_flags = flags;
1448 if (FIB_PATH_CFG_FLAG_DROP & flags)
1450 path->fp_type = FIB_PATH_TYPE_SPECIAL;
1452 else if (FIB_PATH_CFG_FLAG_LOCAL & flags)
1454 path->fp_type = FIB_PATH_TYPE_RECEIVE;
1455 path->attached.fp_interface = FIB_NODE_INDEX_INVALID;
1459 path->fp_type = FIB_PATH_TYPE_EXCLUSIVE;
1460 ASSERT(NULL != dpo);
1461 dpo_copy(&path->exclusive.fp_ex_dpo, dpo);
1464 return (fib_path_get_index(path));
1470 * Copy a path. return index of new path.
1473 fib_path_copy (fib_node_index_t path_index,
1474 fib_node_index_t path_list_index)
1476 fib_path_t *path, *orig_path;
1478 pool_get(fib_path_pool, path);
1480 orig_path = fib_path_get(path_index);
1481 ASSERT(NULL != orig_path);
1483 clib_memcpy(path, orig_path, sizeof(*path));
1485 FIB_PATH_DBG(path, "create-copy:%d", path_index);
1488 * reset the dynamic section
1490 fib_node_init(&path->fp_node, FIB_NODE_TYPE_PATH);
1491 path->fp_oper_flags = FIB_PATH_OPER_FLAG_NONE;
1492 path->fp_pl_index = path_list_index;
1493 path->fp_via_fib = FIB_NODE_INDEX_INVALID;
1494 clib_memset(&path->fp_dpo, 0, sizeof(path->fp_dpo));
1495 dpo_reset(&path->fp_dpo);
1497 return (fib_path_get_index(path));
1503 * destroy a path that is no longer required
1506 fib_path_destroy (fib_node_index_t path_index)
1510 path = fib_path_get(path_index);
1512 ASSERT(NULL != path);
1513 FIB_PATH_DBG(path, "destroy");
1515 fib_path_unresolve(path);
1517 fib_node_deinit(&path->fp_node);
1518 pool_put(fib_path_pool, path);
1524 * destroy a path that is no longer required
1527 fib_path_hash (fib_node_index_t path_index)
1531 path = fib_path_get(path_index);
1533 return (hash_memory(STRUCT_MARK_PTR(path, path_hash_start),
1534 (STRUCT_OFFSET_OF(fib_path_t, path_hash_end) -
1535 STRUCT_OFFSET_OF(fib_path_t, path_hash_start)),
1542 * Compare two paths for equivalence.
1545 fib_path_cmp_i (const fib_path_t *path1,
1546 const fib_path_t *path2)
1553 * paths of different types and protocol are not equal.
1554 * different weights and/or preference only are the same path.
1556 if (path1->fp_type != path2->fp_type)
1558 res = (path1->fp_type - path2->fp_type);
1560 else if (path1->fp_nh_proto != path2->fp_nh_proto)
1562 res = (path1->fp_nh_proto - path2->fp_nh_proto);
1567 * both paths are of the same type.
1568 * consider each type and its attributes in turn.
1570 switch (path1->fp_type)
1572 case FIB_PATH_TYPE_ATTACHED_NEXT_HOP:
1573 res = ip46_address_cmp(&path1->attached_next_hop.fp_nh,
1574 &path2->attached_next_hop.fp_nh);
1576 res = (path1->attached_next_hop.fp_interface -
1577 path2->attached_next_hop.fp_interface);
1580 case FIB_PATH_TYPE_ATTACHED:
1581 res = (path1->attached.fp_interface -
1582 path2->attached.fp_interface);
1584 case FIB_PATH_TYPE_RECURSIVE:
1585 res = ip46_address_cmp(&path1->recursive.fp_nh.fp_ip,
1586 &path2->recursive.fp_nh.fp_ip);
1590 res = (path1->recursive.fp_tbl_id - path2->recursive.fp_tbl_id);
1593 case FIB_PATH_TYPE_BIER_FMASK:
1594 res = (path1->bier_fmask.fp_bier_fmask -
1595 path2->bier_fmask.fp_bier_fmask);
1597 case FIB_PATH_TYPE_BIER_IMP:
1598 res = (path1->bier_imp.fp_bier_imp -
1599 path2->bier_imp.fp_bier_imp);
1601 case FIB_PATH_TYPE_BIER_TABLE:
1602 res = bier_table_id_cmp(&path1->bier_table.fp_bier_tbl,
1603 &path2->bier_table.fp_bier_tbl);
1605 case FIB_PATH_TYPE_DEAG:
1606 res = (path1->deag.fp_tbl_id - path2->deag.fp_tbl_id);
1609 res = (path1->deag.fp_rpf_id - path2->deag.fp_rpf_id);
1612 case FIB_PATH_TYPE_INTF_RX:
1613 res = (path1->intf_rx.fp_interface - path2->intf_rx.fp_interface);
1615 case FIB_PATH_TYPE_UDP_ENCAP:
1616 res = (path1->udp_encap.fp_udp_encap_id - path2->udp_encap.fp_udp_encap_id);
1618 case FIB_PATH_TYPE_DVR:
1619 res = (path1->dvr.fp_interface - path2->dvr.fp_interface);
1621 case FIB_PATH_TYPE_EXCLUSIVE:
1622 res = dpo_cmp(&path1->exclusive.fp_ex_dpo, &path2->exclusive.fp_ex_dpo);
1624 case FIB_PATH_TYPE_SPECIAL:
1625 case FIB_PATH_TYPE_RECEIVE:
1634 * fib_path_cmp_for_sort
1636 * Compare two paths for equivalence. Used during path sorting.
1637 * As usual 0 means equal.
1640 fib_path_cmp_for_sort (void * v1,
1643 fib_node_index_t *pi1 = v1, *pi2 = v2;
1644 fib_path_t *path1, *path2;
1646 path1 = fib_path_get(*pi1);
1647 path2 = fib_path_get(*pi2);
1650 * when sorting paths we want the highest preference paths
1651 * first, so that the choices set built is in prefernce order
1653 if (path1->fp_preference != path2->fp_preference)
1655 return (path1->fp_preference - path2->fp_preference);
1658 return (fib_path_cmp_i(path1, path2));
1664 * Compare two paths for equivalence.
1667 fib_path_cmp (fib_node_index_t pi1,
1668 fib_node_index_t pi2)
1670 fib_path_t *path1, *path2;
1672 path1 = fib_path_get(pi1);
1673 path2 = fib_path_get(pi2);
1675 return (fib_path_cmp_i(path1, path2));
1679 fib_path_cmp_w_route_path (fib_node_index_t path_index,
1680 const fib_route_path_t *rpath)
1685 path = fib_path_get(path_index);
1689 if (path->fp_weight != rpath->frp_weight)
1691 res = (path->fp_weight - rpath->frp_weight);
1696 * both paths are of the same type.
1697 * consider each type and its attributes in turn.
1699 switch (path->fp_type)
1701 case FIB_PATH_TYPE_ATTACHED_NEXT_HOP:
1702 res = ip46_address_cmp(&path->attached_next_hop.fp_nh,
1706 res = (path->attached_next_hop.fp_interface -
1707 rpath->frp_sw_if_index);
1710 case FIB_PATH_TYPE_ATTACHED:
1711 res = (path->attached.fp_interface - rpath->frp_sw_if_index);
1713 case FIB_PATH_TYPE_RECURSIVE:
1714 if (DPO_PROTO_MPLS == path->fp_nh_proto)
1716 res = path->recursive.fp_nh.fp_local_label - rpath->frp_local_label;
1720 res = path->recursive.fp_nh.fp_eos - rpath->frp_eos;
1725 res = ip46_address_cmp(&path->recursive.fp_nh.fp_ip,
1731 res = (path->recursive.fp_tbl_id - rpath->frp_fib_index);
1734 case FIB_PATH_TYPE_BIER_FMASK:
1735 res = (path->bier_fmask.fp_bier_fmask - rpath->frp_bier_fmask);
1737 case FIB_PATH_TYPE_BIER_IMP:
1738 res = (path->bier_imp.fp_bier_imp - rpath->frp_bier_imp);
1740 case FIB_PATH_TYPE_BIER_TABLE:
1741 res = bier_table_id_cmp(&path->bier_table.fp_bier_tbl,
1742 &rpath->frp_bier_tbl);
1744 case FIB_PATH_TYPE_INTF_RX:
1745 res = (path->intf_rx.fp_interface - rpath->frp_sw_if_index);
1747 case FIB_PATH_TYPE_UDP_ENCAP:
1748 res = (path->udp_encap.fp_udp_encap_id - rpath->frp_udp_encap_id);
1750 case FIB_PATH_TYPE_DEAG:
1751 res = (path->deag.fp_tbl_id - rpath->frp_fib_index);
1754 res = (path->deag.fp_rpf_id - rpath->frp_rpf_id);
1757 case FIB_PATH_TYPE_DVR:
1758 res = (path->dvr.fp_interface - rpath->frp_sw_if_index);
1760 case FIB_PATH_TYPE_EXCLUSIVE:
1761 res = dpo_cmp(&path->exclusive.fp_ex_dpo, &rpath->dpo);
1763 case FIB_PATH_TYPE_RECEIVE:
1764 if (rpath->frp_flags & FIB_ROUTE_PATH_LOCAL)
1773 case FIB_PATH_TYPE_SPECIAL:
1782 * fib_path_recursive_loop_detect
1784 * A forward walk of the FIB object graph to detect for a cycle/loop. This
1785 * walk is initiated when an entry is linking to a new path list or from an old.
1786 * The entry vector passed contains all the FIB entrys that are children of this
1787 * path (it is all the entries encountered on the walk so far). If this vector
1788 * contains the entry this path resolve via, then a loop is about to form.
1789 * The loop must be allowed to form, since we need the dependencies in place
1790 * so that we can track when the loop breaks.
1791 * However, we MUST not produce a loop in the forwarding graph (else packets
1792 * would loop around the switch path until the loop breaks), so we mark recursive
1793 * paths as looped so that they do not contribute forwarding information.
1794 * By marking the path as looped, an etry such as;
1796 * via a.a.a.a (looped)
1797 * via b.b.b.b (not looped)
1798 * can still forward using the info provided by b.b.b.b only
1801 fib_path_recursive_loop_detect (fib_node_index_t path_index,
1802 fib_node_index_t **entry_indicies)
1806 path = fib_path_get(path_index);
1809 * the forced drop path is never looped, cos it is never resolved.
1811 if (fib_path_is_permanent_drop(path))
1816 switch (path->fp_type)
1818 case FIB_PATH_TYPE_RECURSIVE:
1820 fib_node_index_t *entry_index, *entries;
1822 entries = *entry_indicies;
1824 vec_foreach(entry_index, entries) {
1825 if (*entry_index == path->fp_via_fib)
1828 * the entry that is about to link to this path-list (or
1829 * one of this path-list's children) is the same entry that
1830 * this recursive path resolves through. this is a cycle.
1840 FIB_PATH_DBG(path, "recursive loop formed");
1841 path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RECURSIVE_LOOP;
1843 dpo_copy(&path->fp_dpo, drop_dpo_get(path->fp_nh_proto));
1848 * no loop here yet. keep forward walking the graph.
1850 if (fib_entry_recursive_loop_detect(path->fp_via_fib, entry_indicies))
1852 FIB_PATH_DBG(path, "recursive loop formed");
1853 path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RECURSIVE_LOOP;
1857 FIB_PATH_DBG(path, "recursive loop cleared");
1858 path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RECURSIVE_LOOP;
1863 case FIB_PATH_TYPE_ATTACHED_NEXT_HOP:
1864 case FIB_PATH_TYPE_ATTACHED:
1865 if (dpo_is_adj(&path->fp_dpo) &&
1866 adj_recursive_loop_detect(path->fp_dpo.dpoi_index,
1869 FIB_PATH_DBG(path, "recursive loop formed");
1870 path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RECURSIVE_LOOP;
1874 FIB_PATH_DBG(path, "recursive loop cleared");
1875 path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RECURSIVE_LOOP;
1878 case FIB_PATH_TYPE_SPECIAL:
1879 case FIB_PATH_TYPE_DEAG:
1880 case FIB_PATH_TYPE_DVR:
1881 case FIB_PATH_TYPE_RECEIVE:
1882 case FIB_PATH_TYPE_INTF_RX:
1883 case FIB_PATH_TYPE_UDP_ENCAP:
1884 case FIB_PATH_TYPE_EXCLUSIVE:
1885 case FIB_PATH_TYPE_BIER_FMASK:
1886 case FIB_PATH_TYPE_BIER_TABLE:
1887 case FIB_PATH_TYPE_BIER_IMP:
1889 * these path types cannot be part of a loop, since they are the leaves
1895 return (fib_path_is_looped(path_index));
1899 fib_path_resolve (fib_node_index_t path_index)
1903 path = fib_path_get(path_index);
1906 * hope for the best.
1908 path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RESOLVED;
1911 * the forced drop path resolves via the drop adj
1913 if (fib_path_is_permanent_drop(path))
1915 dpo_copy(&path->fp_dpo, drop_dpo_get(path->fp_nh_proto));
1916 path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED;
1917 return (fib_path_is_resolved(path_index));
1920 switch (path->fp_type)
1922 case FIB_PATH_TYPE_ATTACHED_NEXT_HOP:
1923 fib_path_attached_next_hop_set(path);
1925 case FIB_PATH_TYPE_ATTACHED:
1927 dpo_id_t tmp = DPO_INVALID;
1930 * path->attached.fp_interface
1932 if (!vnet_sw_interface_is_up(vnet_get_main(),
1933 path->attached.fp_interface))
1935 path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED;
1937 fib_path_attached_get_adj(path,
1938 dpo_proto_to_link(path->fp_nh_proto),
1942 * re-fetch after possible mem realloc
1944 path = fib_path_get(path_index);
1945 dpo_copy(&path->fp_dpo, &tmp);
1948 * become a child of the adjacency so we receive updates
1949 * when the interface state changes
1951 if (dpo_is_adj(&path->fp_dpo))
1953 path->fp_sibling = adj_child_add(path->fp_dpo.dpoi_index,
1955 fib_path_get_index(path));
1960 case FIB_PATH_TYPE_RECURSIVE:
1963 * Create a RR source entry in the table for the address
1964 * that this path recurses through.
1965 * This resolve action is recursive, hence we may create
1966 * more paths in the process. more creates mean maybe realloc
1969 fib_node_index_t fei;
1972 ASSERT(FIB_NODE_INDEX_INVALID == path->fp_via_fib);
1974 if (DPO_PROTO_MPLS == path->fp_nh_proto)
1976 fib_prefix_from_mpls_label(path->recursive.fp_nh.fp_local_label,
1977 path->recursive.fp_nh.fp_eos,
1982 fib_prefix_from_ip46_addr(&path->recursive.fp_nh.fp_ip, &pfx);
1985 fib_table_lock(path->recursive.fp_tbl_id,
1986 dpo_proto_to_fib(path->fp_nh_proto),
1988 fei = fib_table_entry_special_add(path->recursive.fp_tbl_id,
1991 FIB_ENTRY_FLAG_NONE);
1993 path = fib_path_get(path_index);
1994 path->fp_via_fib = fei;
1997 * become a dependent child of the entry so the path is
1998 * informed when the forwarding for the entry changes.
2000 path->fp_sibling = fib_entry_child_add(path->fp_via_fib,
2002 fib_path_get_index(path));
2005 * create and configure the IP DPO
2007 fib_path_recursive_adj_update(
2009 fib_path_to_chain_type(path),
2014 case FIB_PATH_TYPE_BIER_FMASK:
2017 * become a dependent child of the entry so the path is
2018 * informed when the forwarding for the entry changes.
2020 path->fp_sibling = bier_fmask_child_add(path->bier_fmask.fp_bier_fmask,
2022 fib_path_get_index(path));
2024 path->fp_via_bier_fmask = path->bier_fmask.fp_bier_fmask;
2025 fib_path_bier_fmask_update(path, &path->fp_dpo);
2029 case FIB_PATH_TYPE_BIER_IMP:
2030 bier_imp_lock(path->bier_imp.fp_bier_imp);
2031 bier_imp_contribute_forwarding(path->bier_imp.fp_bier_imp,
2035 case FIB_PATH_TYPE_BIER_TABLE:
2038 * Find/create the BIER table to link to
2040 ASSERT(FIB_NODE_INDEX_INVALID == path->fp_via_bier_tbl);
2042 path->fp_via_bier_tbl =
2043 bier_table_ecmp_create_and_lock(&path->bier_table.fp_bier_tbl);
2045 bier_table_contribute_forwarding(path->fp_via_bier_tbl,
2049 case FIB_PATH_TYPE_SPECIAL:
2050 if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_ICMP_PROHIBIT)
2052 ip_null_dpo_add_and_lock (path->fp_nh_proto,
2053 IP_NULL_ACTION_SEND_ICMP_PROHIBIT,
2056 else if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_ICMP_UNREACH)
2058 ip_null_dpo_add_and_lock (path->fp_nh_proto,
2059 IP_NULL_ACTION_SEND_ICMP_UNREACH,
2062 else if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_CLASSIFY)
2064 dpo_set (&path->fp_dpo, DPO_CLASSIFY,
2066 classify_dpo_create (path->fp_nh_proto,
2067 path->classify.fp_classify_table_id));
2072 * Resolve via the drop
2074 dpo_copy(&path->fp_dpo, drop_dpo_get(path->fp_nh_proto));
2077 case FIB_PATH_TYPE_DEAG:
2079 if (DPO_PROTO_BIER == path->fp_nh_proto)
2081 bier_disp_table_contribute_forwarding(path->deag.fp_tbl_id,
2087 * Resolve via a lookup DPO.
2088 * FIXME. control plane should add routes with a table ID
2090 lookup_input_t input;
2093 cast = (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_RPF_ID ?
2096 input = (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_DEAG_SRC ?
2097 LOOKUP_INPUT_SRC_ADDR :
2098 LOOKUP_INPUT_DST_ADDR);
2100 lookup_dpo_add_or_lock_w_fib_index(path->deag.fp_tbl_id,
2104 LOOKUP_TABLE_FROM_CONFIG,
2109 case FIB_PATH_TYPE_DVR:
2110 dvr_dpo_add_or_lock(path->dvr.fp_interface,
2114 case FIB_PATH_TYPE_RECEIVE:
2116 * Resolve via a receive DPO.
2118 receive_dpo_add_or_lock(path->fp_nh_proto,
2119 path->receive.fp_interface,
2120 &path->receive.fp_addr,
2123 case FIB_PATH_TYPE_UDP_ENCAP:
2124 udp_encap_lock(path->udp_encap.fp_udp_encap_id);
2125 udp_encap_contribute_forwarding(path->udp_encap.fp_udp_encap_id,
2129 case FIB_PATH_TYPE_INTF_RX: {
2131 * Resolve via a receive DPO.
2133 interface_rx_dpo_add_or_lock(path->fp_nh_proto,
2134 path->intf_rx.fp_interface,
2138 case FIB_PATH_TYPE_EXCLUSIVE:
2140 * Resolve via the user provided DPO
2142 dpo_copy(&path->fp_dpo, &path->exclusive.fp_ex_dpo);
2146 return (fib_path_is_resolved(path_index));
2150 fib_path_get_resolving_interface (fib_node_index_t path_index)
2154 path = fib_path_get(path_index);
2156 switch (path->fp_type)
2158 case FIB_PATH_TYPE_ATTACHED_NEXT_HOP:
2159 return (path->attached_next_hop.fp_interface);
2160 case FIB_PATH_TYPE_ATTACHED:
2161 return (path->attached.fp_interface);
2162 case FIB_PATH_TYPE_RECEIVE:
2163 return (path->receive.fp_interface);
2164 case FIB_PATH_TYPE_RECURSIVE:
2165 if (fib_path_is_resolved(path_index))
2167 return (fib_entry_get_resolving_interface(path->fp_via_fib));
2170 case FIB_PATH_TYPE_DVR:
2171 return (path->dvr.fp_interface);
2172 case FIB_PATH_TYPE_INTF_RX:
2173 case FIB_PATH_TYPE_UDP_ENCAP:
2174 case FIB_PATH_TYPE_SPECIAL:
2175 case FIB_PATH_TYPE_DEAG:
2176 case FIB_PATH_TYPE_EXCLUSIVE:
2177 case FIB_PATH_TYPE_BIER_FMASK:
2178 case FIB_PATH_TYPE_BIER_TABLE:
2179 case FIB_PATH_TYPE_BIER_IMP:
2182 return (dpo_get_urpf(&path->fp_dpo));
2186 fib_path_get_resolving_index (fib_node_index_t path_index)
2190 path = fib_path_get(path_index);
2192 switch (path->fp_type)
2194 case FIB_PATH_TYPE_ATTACHED_NEXT_HOP:
2195 case FIB_PATH_TYPE_ATTACHED:
2196 case FIB_PATH_TYPE_RECEIVE:
2197 case FIB_PATH_TYPE_INTF_RX:
2198 case FIB_PATH_TYPE_SPECIAL:
2199 case FIB_PATH_TYPE_DEAG:
2200 case FIB_PATH_TYPE_DVR:
2201 case FIB_PATH_TYPE_EXCLUSIVE:
2203 case FIB_PATH_TYPE_UDP_ENCAP:
2204 return (path->udp_encap.fp_udp_encap_id);
2205 case FIB_PATH_TYPE_RECURSIVE:
2206 return (path->fp_via_fib);
2207 case FIB_PATH_TYPE_BIER_FMASK:
2208 return (path->bier_fmask.fp_bier_fmask);
2209 case FIB_PATH_TYPE_BIER_TABLE:
2210 return (path->fp_via_bier_tbl);
2211 case FIB_PATH_TYPE_BIER_IMP:
2212 return (path->bier_imp.fp_bier_imp);
2218 fib_path_get_adj (fib_node_index_t path_index)
2222 path = fib_path_get(path_index);
2224 if (dpo_is_adj(&path->fp_dpo))
2226 return (path->fp_dpo.dpoi_index);
2228 return (ADJ_INDEX_INVALID);
2232 fib_path_get_weight (fib_node_index_t path_index)
2236 path = fib_path_get(path_index);
2240 return (path->fp_weight);
2244 fib_path_get_preference (fib_node_index_t path_index)
2248 path = fib_path_get(path_index);
2252 return (path->fp_preference);
2256 fib_path_get_rpf_id (fib_node_index_t path_index)
2260 path = fib_path_get(path_index);
2264 if (FIB_PATH_CFG_FLAG_RPF_ID & path->fp_cfg_flags)
2266 return (path->deag.fp_rpf_id);
2273 * @brief Contribute the path's adjacency to the list passed.
2274 * By calling this function over all paths, recursively, a child
2275 * can construct its full set of forwarding adjacencies, and hence its
2279 fib_path_contribute_urpf (fib_node_index_t path_index,
2284 path = fib_path_get(path_index);
2287 * resolved and unresolved paths contribute to the RPF list.
2289 switch (path->fp_type)
2291 case FIB_PATH_TYPE_ATTACHED_NEXT_HOP:
2292 fib_urpf_list_append(urpf, path->attached_next_hop.fp_interface);
2295 case FIB_PATH_TYPE_ATTACHED:
2296 fib_urpf_list_append(urpf, path->attached.fp_interface);
2299 case FIB_PATH_TYPE_RECURSIVE:
2300 if (FIB_NODE_INDEX_INVALID != path->fp_via_fib &&
2301 !fib_path_is_looped(path_index))
2304 * there's unresolved due to constraints, and there's unresolved
2305 * due to ain't got no via. can't do nowt w'out via.
2307 fib_entry_contribute_urpf(path->fp_via_fib, urpf);
2311 case FIB_PATH_TYPE_EXCLUSIVE:
2312 case FIB_PATH_TYPE_SPECIAL:
2315 * these path types may link to an adj, if that's what
2318 u32 rpf_sw_if_index;
2320 rpf_sw_if_index = dpo_get_urpf(&path->fp_dpo);
2322 if (~0 != rpf_sw_if_index)
2324 fib_urpf_list_append(urpf, rpf_sw_if_index);
2328 case FIB_PATH_TYPE_DVR:
2329 fib_urpf_list_append(urpf, path->dvr.fp_interface);
2331 case FIB_PATH_TYPE_DEAG:
2332 case FIB_PATH_TYPE_RECEIVE:
2333 case FIB_PATH_TYPE_INTF_RX:
2334 case FIB_PATH_TYPE_UDP_ENCAP:
2335 case FIB_PATH_TYPE_BIER_FMASK:
2336 case FIB_PATH_TYPE_BIER_TABLE:
2337 case FIB_PATH_TYPE_BIER_IMP:
2339 * these path types don't link to an adj
2346 fib_path_stack_mpls_disp (fib_node_index_t path_index,
2347 dpo_proto_t payload_proto,
2348 fib_mpls_lsp_mode_t mode,
2353 path = fib_path_get(path_index);
2357 switch (path->fp_type)
2359 case FIB_PATH_TYPE_ATTACHED_NEXT_HOP:
2361 dpo_id_t tmp = DPO_INVALID;
2363 dpo_copy(&tmp, dpo);
2365 mpls_disp_dpo_create(payload_proto, ~0, mode, &tmp, dpo);
2369 case FIB_PATH_TYPE_DEAG:
2371 dpo_id_t tmp = DPO_INVALID;
2373 dpo_copy(&tmp, dpo);
2375 mpls_disp_dpo_create(payload_proto,
2376 path->deag.fp_rpf_id,
2381 case FIB_PATH_TYPE_RECEIVE:
2382 case FIB_PATH_TYPE_ATTACHED:
2383 case FIB_PATH_TYPE_RECURSIVE:
2384 case FIB_PATH_TYPE_INTF_RX:
2385 case FIB_PATH_TYPE_UDP_ENCAP:
2386 case FIB_PATH_TYPE_EXCLUSIVE:
2387 case FIB_PATH_TYPE_SPECIAL:
2388 case FIB_PATH_TYPE_BIER_FMASK:
2389 case FIB_PATH_TYPE_BIER_TABLE:
2390 case FIB_PATH_TYPE_BIER_IMP:
2391 case FIB_PATH_TYPE_DVR:
2395 if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_POP_PW_CW)
2397 dpo_id_t tmp = DPO_INVALID;
2399 dpo_copy(&tmp, dpo);
2401 pw_cw_dpo_create(&tmp, dpo);
2407 fib_path_contribute_forwarding (fib_node_index_t path_index,
2408 fib_forward_chain_type_t fct,
2413 path = fib_path_get(path_index);
2416 ASSERT(FIB_FORW_CHAIN_TYPE_MPLS_EOS != fct);
2419 * The DPO stored in the path was created when the path was resolved.
2420 * This then represents the path's 'native' protocol; IP.
2421 * For all others will need to go find something else.
2423 if (fib_path_to_chain_type(path) == fct)
2425 dpo_copy(dpo, &path->fp_dpo);
2429 switch (path->fp_type)
2431 case FIB_PATH_TYPE_ATTACHED_NEXT_HOP:
2434 case FIB_FORW_CHAIN_TYPE_UNICAST_IP4:
2435 case FIB_FORW_CHAIN_TYPE_UNICAST_IP6:
2436 case FIB_FORW_CHAIN_TYPE_MPLS_EOS:
2437 case FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS:
2438 case FIB_FORW_CHAIN_TYPE_ETHERNET:
2439 case FIB_FORW_CHAIN_TYPE_NSH:
2440 case FIB_FORW_CHAIN_TYPE_MCAST_IP4:
2441 case FIB_FORW_CHAIN_TYPE_MCAST_IP6:
2442 path = fib_path_attached_next_hop_get_adj(
2444 fib_forw_chain_type_to_link_type(fct),
2447 case FIB_FORW_CHAIN_TYPE_BIER:
2451 case FIB_PATH_TYPE_RECURSIVE:
2454 case FIB_FORW_CHAIN_TYPE_MPLS_EOS:
2455 case FIB_FORW_CHAIN_TYPE_UNICAST_IP4:
2456 case FIB_FORW_CHAIN_TYPE_UNICAST_IP6:
2457 case FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS:
2458 case FIB_FORW_CHAIN_TYPE_MCAST_IP4:
2459 case FIB_FORW_CHAIN_TYPE_MCAST_IP6:
2460 case FIB_FORW_CHAIN_TYPE_BIER:
2461 fib_path_recursive_adj_update(path, fct, dpo);
2463 case FIB_FORW_CHAIN_TYPE_ETHERNET:
2464 case FIB_FORW_CHAIN_TYPE_NSH:
2469 case FIB_PATH_TYPE_BIER_TABLE:
2472 case FIB_FORW_CHAIN_TYPE_BIER:
2473 bier_table_contribute_forwarding(path->fp_via_bier_tbl, dpo);
2475 case FIB_FORW_CHAIN_TYPE_MPLS_EOS:
2476 case FIB_FORW_CHAIN_TYPE_UNICAST_IP4:
2477 case FIB_FORW_CHAIN_TYPE_UNICAST_IP6:
2478 case FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS:
2479 case FIB_FORW_CHAIN_TYPE_MCAST_IP4:
2480 case FIB_FORW_CHAIN_TYPE_MCAST_IP6:
2481 case FIB_FORW_CHAIN_TYPE_ETHERNET:
2482 case FIB_FORW_CHAIN_TYPE_NSH:
2487 case FIB_PATH_TYPE_BIER_FMASK:
2490 case FIB_FORW_CHAIN_TYPE_BIER:
2491 fib_path_bier_fmask_update(path, dpo);
2493 case FIB_FORW_CHAIN_TYPE_MPLS_EOS:
2494 case FIB_FORW_CHAIN_TYPE_UNICAST_IP4:
2495 case FIB_FORW_CHAIN_TYPE_UNICAST_IP6:
2496 case FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS:
2497 case FIB_FORW_CHAIN_TYPE_MCAST_IP4:
2498 case FIB_FORW_CHAIN_TYPE_MCAST_IP6:
2499 case FIB_FORW_CHAIN_TYPE_ETHERNET:
2500 case FIB_FORW_CHAIN_TYPE_NSH:
2505 case FIB_PATH_TYPE_BIER_IMP:
2506 bier_imp_contribute_forwarding(path->bier_imp.fp_bier_imp,
2507 fib_forw_chain_type_to_dpo_proto(fct),
2510 case FIB_PATH_TYPE_DEAG:
2513 case FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS:
2514 lookup_dpo_add_or_lock_w_table_id(MPLS_FIB_DEFAULT_TABLE_ID,
2517 LOOKUP_INPUT_DST_ADDR,
2518 LOOKUP_TABLE_FROM_CONFIG,
2521 case FIB_FORW_CHAIN_TYPE_MPLS_EOS:
2522 case FIB_FORW_CHAIN_TYPE_UNICAST_IP4:
2523 case FIB_FORW_CHAIN_TYPE_UNICAST_IP6:
2524 case FIB_FORW_CHAIN_TYPE_MCAST_IP4:
2525 case FIB_FORW_CHAIN_TYPE_MCAST_IP6:
2526 dpo_copy(dpo, &path->fp_dpo);
2528 case FIB_FORW_CHAIN_TYPE_BIER:
2530 case FIB_FORW_CHAIN_TYPE_ETHERNET:
2531 case FIB_FORW_CHAIN_TYPE_NSH:
2536 case FIB_PATH_TYPE_EXCLUSIVE:
2537 dpo_copy(dpo, &path->exclusive.fp_ex_dpo);
2539 case FIB_PATH_TYPE_ATTACHED:
2542 case FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS:
2543 case FIB_FORW_CHAIN_TYPE_UNICAST_IP4:
2544 case FIB_FORW_CHAIN_TYPE_UNICAST_IP6:
2545 case FIB_FORW_CHAIN_TYPE_MPLS_EOS:
2546 case FIB_FORW_CHAIN_TYPE_ETHERNET:
2547 case FIB_FORW_CHAIN_TYPE_NSH:
2548 case FIB_FORW_CHAIN_TYPE_BIER:
2549 fib_path_attached_get_adj(path,
2550 fib_forw_chain_type_to_link_type(fct),
2553 case FIB_FORW_CHAIN_TYPE_MCAST_IP4:
2554 case FIB_FORW_CHAIN_TYPE_MCAST_IP6:
2559 * Create the adj needed for sending IP multicast traffic
2561 if (vnet_sw_interface_is_p2p(vnet_get_main(),
2562 path->attached.fp_interface))
2565 * point-2-point interfaces do not require a glean, since
2566 * there is nothing to ARP. Install a rewrite/nbr adj instead
2568 ai = adj_nbr_add_or_lock(dpo_proto_to_fib(path->fp_nh_proto),
2569 fib_forw_chain_type_to_link_type(fct),
2571 path->attached.fp_interface);
2575 ai = adj_mcast_add_or_lock(dpo_proto_to_fib(path->fp_nh_proto),
2576 fib_forw_chain_type_to_link_type(fct),
2577 path->attached.fp_interface);
2579 dpo_set(dpo, DPO_ADJACENCY,
2580 fib_forw_chain_type_to_dpo_proto(fct),
2587 case FIB_PATH_TYPE_INTF_RX:
2589 * Create the adj needed for sending IP multicast traffic
2591 interface_rx_dpo_add_or_lock(fib_forw_chain_type_to_dpo_proto(fct),
2592 path->attached.fp_interface,
2595 case FIB_PATH_TYPE_UDP_ENCAP:
2596 udp_encap_contribute_forwarding(path->udp_encap.fp_udp_encap_id,
2600 case FIB_PATH_TYPE_RECEIVE:
2601 case FIB_PATH_TYPE_SPECIAL:
2602 case FIB_PATH_TYPE_DVR:
2603 dpo_copy(dpo, &path->fp_dpo);
2609 load_balance_path_t *
2610 fib_path_append_nh_for_multipath_hash (fib_node_index_t path_index,
2611 fib_forward_chain_type_t fct,
2612 load_balance_path_t *hash_key)
2614 load_balance_path_t *mnh;
2617 path = fib_path_get(path_index);
2621 vec_add2(hash_key, mnh, 1);
2623 mnh->path_weight = path->fp_weight;
2624 mnh->path_index = path_index;
2626 if (fib_path_is_resolved(path_index))
2628 fib_path_contribute_forwarding(path_index, fct, &mnh->path_dpo);
2632 dpo_copy(&mnh->path_dpo,
2633 drop_dpo_get(fib_forw_chain_type_to_dpo_proto(fct)));
2639 fib_path_is_recursive_constrained (fib_node_index_t path_index)
2643 path = fib_path_get(path_index);
2645 return ((FIB_PATH_TYPE_RECURSIVE == path->fp_type) &&
2646 ((path->fp_cfg_flags & FIB_PATH_CFG_FLAG_RESOLVE_ATTACHED) ||
2647 (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_RESOLVE_HOST)));
2651 fib_path_is_exclusive (fib_node_index_t path_index)
2655 path = fib_path_get(path_index);
2657 return (FIB_PATH_TYPE_EXCLUSIVE == path->fp_type);
2661 fib_path_is_deag (fib_node_index_t path_index)
2665 path = fib_path_get(path_index);
2667 return (FIB_PATH_TYPE_DEAG == path->fp_type);
2671 fib_path_is_resolved (fib_node_index_t path_index)
2675 path = fib_path_get(path_index);
2677 return (dpo_id_is_valid(&path->fp_dpo) &&
2678 (path->fp_oper_flags & FIB_PATH_OPER_FLAG_RESOLVED) &&
2679 !fib_path_is_looped(path_index) &&
2680 !fib_path_is_permanent_drop(path));
2684 fib_path_is_looped (fib_node_index_t path_index)
2688 path = fib_path_get(path_index);
2690 return (path->fp_oper_flags & FIB_PATH_OPER_FLAG_RECURSIVE_LOOP);
2693 fib_path_list_walk_rc_t
2694 fib_path_encode (fib_node_index_t path_list_index,
2695 fib_node_index_t path_index,
2696 const fib_path_ext_t *path_ext,
2699 fib_path_encode_ctx_t *ctx = args;
2700 fib_route_path_t *rpath;
2703 path = fib_path_get(path_index);
2705 return (FIB_PATH_LIST_WALK_CONTINUE);
2707 vec_add2(ctx->rpaths, rpath, 1);
2708 rpath->frp_weight = path->fp_weight;
2709 rpath->frp_preference = path->fp_preference;
2710 rpath->frp_proto = path->fp_nh_proto;
2711 rpath->frp_sw_if_index = ~0;
2712 rpath->frp_fib_index = 0;
2714 switch (path->fp_type)
2716 case FIB_PATH_TYPE_RECEIVE:
2717 rpath->frp_addr = path->receive.fp_addr;
2718 rpath->frp_sw_if_index = path->receive.fp_interface;
2719 rpath->frp_flags |= FIB_ROUTE_PATH_LOCAL;
2721 case FIB_PATH_TYPE_ATTACHED:
2722 rpath->frp_sw_if_index = path->attached.fp_interface;
2724 case FIB_PATH_TYPE_ATTACHED_NEXT_HOP:
2725 rpath->frp_sw_if_index = path->attached_next_hop.fp_interface;
2726 rpath->frp_addr = path->attached_next_hop.fp_nh;
2728 case FIB_PATH_TYPE_BIER_FMASK:
2729 rpath->frp_bier_fmask = path->bier_fmask.fp_bier_fmask;
2731 case FIB_PATH_TYPE_SPECIAL:
2733 case FIB_PATH_TYPE_DEAG:
2734 rpath->frp_fib_index = path->deag.fp_tbl_id;
2735 if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_RPF_ID)
2737 rpath->frp_flags |= FIB_ROUTE_PATH_RPF_ID;
2740 case FIB_PATH_TYPE_RECURSIVE:
2741 rpath->frp_addr = path->recursive.fp_nh.fp_ip;
2742 rpath->frp_fib_index = path->recursive.fp_tbl_id;
2744 case FIB_PATH_TYPE_DVR:
2745 rpath->frp_sw_if_index = path->dvr.fp_interface;
2746 rpath->frp_flags |= FIB_ROUTE_PATH_DVR;
2748 case FIB_PATH_TYPE_UDP_ENCAP:
2749 rpath->frp_udp_encap_id = path->udp_encap.fp_udp_encap_id;
2750 rpath->frp_flags |= FIB_ROUTE_PATH_UDP_ENCAP;
2752 case FIB_PATH_TYPE_INTF_RX:
2753 rpath->frp_sw_if_index = path->receive.fp_interface;
2754 rpath->frp_flags |= FIB_ROUTE_PATH_INTF_RX;
2756 case FIB_PATH_TYPE_EXCLUSIVE:
2757 rpath->frp_flags |= FIB_ROUTE_PATH_EXCLUSIVE;
2762 if (path_ext && path_ext->fpe_type == FIB_PATH_EXT_MPLS)
2764 rpath->frp_label_stack = path_ext->fpe_path.frp_label_stack;
2767 if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_DROP)
2768 rpath->frp_flags |= FIB_ROUTE_PATH_DROP;
2769 if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_ICMP_UNREACH)
2770 rpath->frp_flags |= FIB_ROUTE_PATH_ICMP_UNREACH;
2771 if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_ICMP_PROHIBIT)
2772 rpath->frp_flags |= FIB_ROUTE_PATH_ICMP_PROHIBIT;
2774 return (FIB_PATH_LIST_WALK_CONTINUE);
2778 fib_path_get_proto (fib_node_index_t path_index)
2782 path = fib_path_get(path_index);
2784 return (path->fp_nh_proto);
2788 fib_path_module_init (void)
2790 fib_node_register_type (FIB_NODE_TYPE_PATH, &fib_path_vft);
2791 fib_path_logger = vlib_log_register_class ("fib", "path");
2794 static clib_error_t *
2795 show_fib_path_command (vlib_main_t * vm,
2796 unformat_input_t * input,
2797 vlib_cli_command_t * cmd)
2799 fib_node_index_t pi;
2802 if (unformat (input, "%d", &pi))
2805 * show one in detail
2807 if (!pool_is_free_index(fib_path_pool, pi))
2809 path = fib_path_get(pi);
2810 u8 *s = format(NULL, "%U", format_fib_path, pi, 1,
2811 FIB_PATH_FORMAT_FLAGS_NONE);
2812 s = format(s, "\n children:");
2813 s = fib_node_children_format(path->fp_node.fn_children, s);
2814 vlib_cli_output (vm, "%v", s);
2819 vlib_cli_output (vm, "path %d invalid", pi);
2824 vlib_cli_output (vm, "FIB Paths");
2825 pool_foreach_index (pi, fib_path_pool)
2827 vlib_cli_output (vm, "%U", format_fib_path, pi, 0,
2828 FIB_PATH_FORMAT_FLAGS_NONE);
2835 VLIB_CLI_COMMAND (show_fib_path, static) = {
2836 .path = "show fib paths",
2837 .function = show_fib_path_command,
2838 .short_help = "show fib paths",