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_DOWN & ctx->fnbw_reason))
1005 * ADJ updates (complete<->incomplete) do not need to propagate to
1006 * recursive entries.
1007 * The only reason its needed as far back as here, is that the adj
1008 * and the incomplete adj are a different DPO type, so the LBs need
1010 * If this walk was quashed in the fib_entry, then any non-fib_path
1011 * children (like tunnels that collapse out the LB when they stack)
1012 * would not see the update.
1014 return (FIB_NODE_BACK_WALK_CONTINUE);
1017 case FIB_PATH_TYPE_BIER_FMASK:
1018 if (FIB_NODE_BW_REASON_FLAG_EVALUATE & ctx->fnbw_reason)
1021 * update to use the BIER fmask's new forwading
1023 fib_path_bier_fmask_update(path, &path->fp_dpo);
1025 if ((FIB_NODE_BW_REASON_FLAG_ADJ_UPDATE & ctx->fnbw_reason) ||
1026 (FIB_NODE_BW_REASON_FLAG_ADJ_DOWN & ctx->fnbw_reason))
1029 * ADJ updates (complete<->incomplete) do not need to propagate to
1030 * recursive entries.
1031 * The only reason its needed as far back as here, is that the adj
1032 * and the incomplete adj are a different DPO type, so the LBs need
1034 * If this walk was quashed in the fib_entry, then any non-fib_path
1035 * children (like tunnels that collapse out the LB when they stack)
1036 * would not see the update.
1038 return (FIB_NODE_BACK_WALK_CONTINUE);
1041 case FIB_PATH_TYPE_ATTACHED_NEXT_HOP:
1044 * ADJ_UPDATE backwalk pass silently through here and up to
1045 * the path-list when the multipath adj collapse occurs.
1046 * The reason we do this is that the assumtption is that VPP
1047 * runs in an environment where the Control-Plane is remote
1048 * and hence reacts slowly to link up down. In order to remove
1049 * this down link from the ECMP set quickly, we back-walk.
1050 * VPP also has dedicated CPUs, so we are not stealing resources
1051 * from the CP to do so.
1053 if (FIB_NODE_BW_REASON_FLAG_INTERFACE_UP & ctx->fnbw_reason)
1055 if (path->fp_oper_flags & FIB_PATH_OPER_FLAG_RESOLVED)
1058 * alreday resolved. no need to walk back again
1060 return (FIB_NODE_BACK_WALK_CONTINUE);
1062 path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RESOLVED;
1064 if (FIB_NODE_BW_REASON_FLAG_INTERFACE_DOWN & ctx->fnbw_reason)
1066 if (!(path->fp_oper_flags & FIB_PATH_OPER_FLAG_RESOLVED))
1069 * alreday unresolved. no need to walk back again
1071 return (FIB_NODE_BACK_WALK_CONTINUE);
1073 path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED;
1075 if (FIB_NODE_BW_REASON_FLAG_INTERFACE_DELETE & ctx->fnbw_reason)
1078 * The interface this path resolves through has been deleted.
1079 * This will leave the path in a permanent drop state. The route
1080 * needs to be removed and readded (and hence the path-list deleted)
1081 * before it can forward again.
1083 fib_path_unresolve(path);
1084 path->fp_oper_flags |= FIB_PATH_OPER_FLAG_DROP;
1086 if (FIB_NODE_BW_REASON_FLAG_ADJ_UPDATE & ctx->fnbw_reason)
1089 * restack the DPO to pick up the correct DPO sub-type
1093 if_is_up = vnet_sw_interface_is_up(
1095 path->attached_next_hop.fp_interface);
1097 path = fib_path_attached_next_hop_get_adj(
1099 dpo_proto_to_link(path->fp_nh_proto),
1102 path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED;
1103 if (if_is_up && adj_is_up(path->fp_dpo.dpoi_index))
1105 path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RESOLVED;
1111 * If the interface is not up there is no reason to walk
1112 * back to children. if we did they would only evalute
1113 * that this path is unresolved and hence it would
1114 * not contribute the adjacency - so it would be wasted
1117 return (FIB_NODE_BACK_WALK_CONTINUE);
1120 if (FIB_NODE_BW_REASON_FLAG_ADJ_DOWN & ctx->fnbw_reason)
1122 if (!(path->fp_oper_flags & FIB_PATH_OPER_FLAG_RESOLVED))
1125 * alreday unresolved. no need to walk back again
1127 return (FIB_NODE_BACK_WALK_CONTINUE);
1130 * the adj has gone down. the path is no longer resolved.
1132 path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED;
1135 case FIB_PATH_TYPE_ATTACHED:
1136 case FIB_PATH_TYPE_DVR:
1138 * FIXME; this could schedule a lower priority walk, since attached
1139 * routes are not usually in ECMP configurations so the backwalk to
1140 * the FIB entry does not need to be high priority
1142 if (FIB_NODE_BW_REASON_FLAG_INTERFACE_UP & ctx->fnbw_reason)
1144 path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RESOLVED;
1146 if (FIB_NODE_BW_REASON_FLAG_INTERFACE_DOWN & ctx->fnbw_reason)
1148 path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED;
1150 if (FIB_NODE_BW_REASON_FLAG_INTERFACE_DELETE & ctx->fnbw_reason)
1152 fib_path_unresolve(path);
1153 path->fp_oper_flags |= FIB_PATH_OPER_FLAG_DROP;
1156 case FIB_PATH_TYPE_UDP_ENCAP:
1158 dpo_id_t via_dpo = DPO_INVALID;
1161 * hope for the best - clear if restrictions apply.
1163 path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RESOLVED;
1165 udp_encap_contribute_forwarding(path->udp_encap.fp_udp_encap_id,
1169 * If this path is contributing a drop, then it's not resolved
1171 if (dpo_is_drop(&via_dpo) || load_balance_is_drop(&via_dpo))
1173 path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED;
1177 * update the path's contributed DPO
1179 dpo_copy(&path->fp_dpo, &via_dpo);
1180 dpo_reset(&via_dpo);
1183 case FIB_PATH_TYPE_INTF_RX:
1185 case FIB_PATH_TYPE_DEAG:
1187 * FIXME When VRF delete is allowed this will need a poke.
1189 case FIB_PATH_TYPE_SPECIAL:
1190 case FIB_PATH_TYPE_RECEIVE:
1191 case FIB_PATH_TYPE_EXCLUSIVE:
1192 case FIB_PATH_TYPE_BIER_TABLE:
1193 case FIB_PATH_TYPE_BIER_IMP:
1195 * these path types have no parents. so to be
1196 * walked from one is unexpected.
1203 * propagate the backwalk further to the path-list
1205 fib_path_list_back_walk(path->fp_pl_index, ctx);
1207 return (FIB_NODE_BACK_WALK_CONTINUE);
1211 fib_path_memory_show (void)
1213 fib_show_memory_usage("Path",
1214 pool_elts(fib_path_pool),
1215 pool_len(fib_path_pool),
1216 sizeof(fib_path_t));
1220 * The FIB path's graph node virtual function table
1222 static const fib_node_vft_t fib_path_vft = {
1223 .fnv_get = fib_path_get_node,
1224 .fnv_last_lock = fib_path_last_lock_gone,
1225 .fnv_back_walk = fib_path_back_walk_notify,
1226 .fnv_mem_show = fib_path_memory_show,
1229 static fib_path_cfg_flags_t
1230 fib_path_route_flags_to_cfg_flags (const fib_route_path_t *rpath)
1232 fib_path_cfg_flags_t cfg_flags = FIB_PATH_CFG_FLAG_NONE;
1234 if (rpath->frp_flags & FIB_ROUTE_PATH_POP_PW_CW)
1235 cfg_flags |= FIB_PATH_CFG_FLAG_POP_PW_CW;
1236 if (rpath->frp_flags & FIB_ROUTE_PATH_RESOLVE_VIA_HOST)
1237 cfg_flags |= FIB_PATH_CFG_FLAG_RESOLVE_HOST;
1238 if (rpath->frp_flags & FIB_ROUTE_PATH_RESOLVE_VIA_ATTACHED)
1239 cfg_flags |= FIB_PATH_CFG_FLAG_RESOLVE_ATTACHED;
1240 if (rpath->frp_flags & FIB_ROUTE_PATH_LOCAL)
1241 cfg_flags |= FIB_PATH_CFG_FLAG_LOCAL;
1242 if (rpath->frp_flags & FIB_ROUTE_PATH_ATTACHED)
1243 cfg_flags |= FIB_PATH_CFG_FLAG_ATTACHED;
1244 if (rpath->frp_flags & FIB_ROUTE_PATH_INTF_RX)
1245 cfg_flags |= FIB_PATH_CFG_FLAG_INTF_RX;
1246 if (rpath->frp_flags & FIB_ROUTE_PATH_RPF_ID)
1247 cfg_flags |= FIB_PATH_CFG_FLAG_RPF_ID;
1248 if (rpath->frp_flags & FIB_ROUTE_PATH_EXCLUSIVE)
1249 cfg_flags |= FIB_PATH_CFG_FLAG_EXCLUSIVE;
1250 if (rpath->frp_flags & FIB_ROUTE_PATH_DROP)
1251 cfg_flags |= FIB_PATH_CFG_FLAG_DROP;
1252 if (rpath->frp_flags & FIB_ROUTE_PATH_SOURCE_LOOKUP)
1253 cfg_flags |= FIB_PATH_CFG_FLAG_DEAG_SRC;
1254 if (rpath->frp_flags & FIB_ROUTE_PATH_ICMP_UNREACH)
1255 cfg_flags |= FIB_PATH_CFG_FLAG_ICMP_UNREACH;
1256 if (rpath->frp_flags & FIB_ROUTE_PATH_ICMP_PROHIBIT)
1257 cfg_flags |= FIB_PATH_CFG_FLAG_ICMP_PROHIBIT;
1258 if (rpath->frp_flags & FIB_ROUTE_PATH_GLEAN)
1259 cfg_flags |= FIB_PATH_CFG_FLAG_GLEAN;
1267 * Create and initialise a new path object.
1268 * return the index of the path.
1271 fib_path_create (fib_node_index_t pl_index,
1272 const fib_route_path_t *rpath)
1276 pool_get(fib_path_pool, path);
1277 clib_memset(path, 0, sizeof(*path));
1279 fib_node_init(&path->fp_node,
1280 FIB_NODE_TYPE_PATH);
1282 dpo_reset(&path->fp_dpo);
1283 path->fp_pl_index = pl_index;
1284 path->fp_nh_proto = rpath->frp_proto;
1285 path->fp_via_fib = FIB_NODE_INDEX_INVALID;
1286 path->fp_weight = rpath->frp_weight;
1287 if (0 == path->fp_weight)
1290 * a weight of 0 is a meaningless value. We could either reject it, and thus force
1291 * clients to always use 1, or we can accept it and fixup approrpiately.
1293 path->fp_weight = 1;
1295 path->fp_preference = rpath->frp_preference;
1296 path->fp_cfg_flags = fib_path_route_flags_to_cfg_flags(rpath);
1299 * deduce the path's tpye from the parementers and save what is needed.
1301 if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_LOCAL)
1303 path->fp_type = FIB_PATH_TYPE_RECEIVE;
1304 path->receive.fp_interface = rpath->frp_sw_if_index;
1305 path->receive.fp_addr = rpath->frp_addr;
1307 else if (rpath->frp_flags & FIB_ROUTE_PATH_UDP_ENCAP)
1309 path->fp_type = FIB_PATH_TYPE_UDP_ENCAP;
1310 path->udp_encap.fp_udp_encap_id = rpath->frp_udp_encap_id;
1312 else if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_INTF_RX)
1314 path->fp_type = FIB_PATH_TYPE_INTF_RX;
1315 path->intf_rx.fp_interface = rpath->frp_sw_if_index;
1317 else if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_RPF_ID)
1319 path->fp_type = FIB_PATH_TYPE_DEAG;
1320 path->deag.fp_tbl_id = rpath->frp_fib_index;
1321 path->deag.fp_rpf_id = rpath->frp_rpf_id;
1323 else if (rpath->frp_flags & FIB_ROUTE_PATH_BIER_FMASK)
1325 path->fp_type = FIB_PATH_TYPE_BIER_FMASK;
1326 path->bier_fmask.fp_bier_fmask = rpath->frp_bier_fmask;
1328 else if (rpath->frp_flags & FIB_ROUTE_PATH_BIER_IMP)
1330 path->fp_type = FIB_PATH_TYPE_BIER_IMP;
1331 path->bier_imp.fp_bier_imp = rpath->frp_bier_imp;
1333 else if (rpath->frp_flags & FIB_ROUTE_PATH_BIER_TABLE)
1335 path->fp_type = FIB_PATH_TYPE_BIER_TABLE;
1336 path->bier_table.fp_bier_tbl = rpath->frp_bier_tbl;
1338 else if (rpath->frp_flags & FIB_ROUTE_PATH_DEAG)
1340 path->fp_type = FIB_PATH_TYPE_DEAG;
1341 path->deag.fp_tbl_id = rpath->frp_fib_index;
1343 else if (rpath->frp_flags & FIB_ROUTE_PATH_DVR)
1345 path->fp_type = FIB_PATH_TYPE_DVR;
1346 path->dvr.fp_interface = rpath->frp_sw_if_index;
1348 else if (rpath->frp_flags & FIB_ROUTE_PATH_EXCLUSIVE)
1350 path->fp_type = FIB_PATH_TYPE_EXCLUSIVE;
1351 dpo_copy(&path->exclusive.fp_ex_dpo, &rpath->dpo);
1353 else if ((path->fp_cfg_flags & FIB_PATH_CFG_FLAG_ICMP_PROHIBIT) ||
1354 (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_ICMP_UNREACH))
1356 path->fp_type = FIB_PATH_TYPE_SPECIAL;
1358 else if ((path->fp_cfg_flags & FIB_PATH_CFG_FLAG_CLASSIFY))
1360 path->fp_type = FIB_PATH_TYPE_SPECIAL;
1361 path->classify.fp_classify_table_id = rpath->frp_classify_table_id;
1363 else if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_GLEAN)
1365 path->fp_type = FIB_PATH_TYPE_ATTACHED;
1366 path->attached.fp_interface = rpath->frp_sw_if_index;
1367 path->attached.fp_connected = rpath->frp_connected;
1369 else if (~0 != rpath->frp_sw_if_index)
1371 if (ip46_address_is_zero(&rpath->frp_addr))
1373 path->fp_type = FIB_PATH_TYPE_ATTACHED;
1374 path->attached.fp_interface = rpath->frp_sw_if_index;
1378 path->fp_type = FIB_PATH_TYPE_ATTACHED_NEXT_HOP;
1379 path->attached_next_hop.fp_interface = rpath->frp_sw_if_index;
1380 path->attached_next_hop.fp_nh = rpath->frp_addr;
1385 if (ip46_address_is_zero(&rpath->frp_addr))
1387 if (~0 == rpath->frp_fib_index)
1389 path->fp_type = FIB_PATH_TYPE_SPECIAL;
1393 path->fp_type = FIB_PATH_TYPE_DEAG;
1394 path->deag.fp_tbl_id = rpath->frp_fib_index;
1395 path->deag.fp_rpf_id = ~0;
1400 path->fp_type = FIB_PATH_TYPE_RECURSIVE;
1401 if (DPO_PROTO_MPLS == path->fp_nh_proto)
1403 path->recursive.fp_nh.fp_local_label = rpath->frp_local_label;
1404 path->recursive.fp_nh.fp_eos = rpath->frp_eos;
1408 path->recursive.fp_nh.fp_ip = rpath->frp_addr;
1410 path->recursive.fp_tbl_id = rpath->frp_fib_index;
1414 FIB_PATH_DBG(path, "create");
1416 return (fib_path_get_index(path));
1420 * fib_path_create_special
1422 * Create and initialise a new path object.
1423 * return the index of the path.
1426 fib_path_create_special (fib_node_index_t pl_index,
1427 dpo_proto_t nh_proto,
1428 fib_path_cfg_flags_t flags,
1429 const dpo_id_t *dpo)
1433 pool_get(fib_path_pool, path);
1434 clib_memset(path, 0, sizeof(*path));
1436 fib_node_init(&path->fp_node,
1437 FIB_NODE_TYPE_PATH);
1438 dpo_reset(&path->fp_dpo);
1440 path->fp_pl_index = pl_index;
1441 path->fp_weight = 1;
1442 path->fp_preference = 0;
1443 path->fp_nh_proto = nh_proto;
1444 path->fp_via_fib = FIB_NODE_INDEX_INVALID;
1445 path->fp_cfg_flags = flags;
1447 if (FIB_PATH_CFG_FLAG_DROP & flags)
1449 path->fp_type = FIB_PATH_TYPE_SPECIAL;
1451 else if (FIB_PATH_CFG_FLAG_LOCAL & flags)
1453 path->fp_type = FIB_PATH_TYPE_RECEIVE;
1454 path->attached.fp_interface = FIB_NODE_INDEX_INVALID;
1458 path->fp_type = FIB_PATH_TYPE_EXCLUSIVE;
1459 ASSERT(NULL != dpo);
1460 dpo_copy(&path->exclusive.fp_ex_dpo, dpo);
1463 return (fib_path_get_index(path));
1469 * Copy a path. return index of new path.
1472 fib_path_copy (fib_node_index_t path_index,
1473 fib_node_index_t path_list_index)
1475 fib_path_t *path, *orig_path;
1477 pool_get(fib_path_pool, path);
1479 orig_path = fib_path_get(path_index);
1480 ASSERT(NULL != orig_path);
1482 clib_memcpy(path, orig_path, sizeof(*path));
1484 FIB_PATH_DBG(path, "create-copy:%d", path_index);
1487 * reset the dynamic section
1489 fib_node_init(&path->fp_node, FIB_NODE_TYPE_PATH);
1490 path->fp_oper_flags = FIB_PATH_OPER_FLAG_NONE;
1491 path->fp_pl_index = path_list_index;
1492 path->fp_via_fib = FIB_NODE_INDEX_INVALID;
1493 clib_memset(&path->fp_dpo, 0, sizeof(path->fp_dpo));
1494 dpo_reset(&path->fp_dpo);
1496 return (fib_path_get_index(path));
1502 * destroy a path that is no longer required
1505 fib_path_destroy (fib_node_index_t path_index)
1509 path = fib_path_get(path_index);
1511 ASSERT(NULL != path);
1512 FIB_PATH_DBG(path, "destroy");
1514 fib_path_unresolve(path);
1516 fib_node_deinit(&path->fp_node);
1517 pool_put(fib_path_pool, path);
1523 * destroy a path that is no longer required
1526 fib_path_hash (fib_node_index_t path_index)
1530 path = fib_path_get(path_index);
1532 return (hash_memory(STRUCT_MARK_PTR(path, path_hash_start),
1533 (STRUCT_OFFSET_OF(fib_path_t, path_hash_end) -
1534 STRUCT_OFFSET_OF(fib_path_t, path_hash_start)),
1541 * Compare two paths for equivalence.
1544 fib_path_cmp_i (const fib_path_t *path1,
1545 const fib_path_t *path2)
1552 * paths of different types and protocol are not equal.
1553 * different weights and/or preference only are the same path.
1555 if (path1->fp_type != path2->fp_type)
1557 res = (path1->fp_type - path2->fp_type);
1559 else if (path1->fp_nh_proto != path2->fp_nh_proto)
1561 res = (path1->fp_nh_proto - path2->fp_nh_proto);
1566 * both paths are of the same type.
1567 * consider each type and its attributes in turn.
1569 switch (path1->fp_type)
1571 case FIB_PATH_TYPE_ATTACHED_NEXT_HOP:
1572 res = ip46_address_cmp(&path1->attached_next_hop.fp_nh,
1573 &path2->attached_next_hop.fp_nh);
1575 res = (path1->attached_next_hop.fp_interface -
1576 path2->attached_next_hop.fp_interface);
1579 case FIB_PATH_TYPE_ATTACHED:
1580 res = (path1->attached.fp_interface -
1581 path2->attached.fp_interface);
1583 case FIB_PATH_TYPE_RECURSIVE:
1584 res = ip46_address_cmp(&path1->recursive.fp_nh.fp_ip,
1585 &path2->recursive.fp_nh.fp_ip);
1589 res = (path1->recursive.fp_tbl_id - path2->recursive.fp_tbl_id);
1592 case FIB_PATH_TYPE_BIER_FMASK:
1593 res = (path1->bier_fmask.fp_bier_fmask -
1594 path2->bier_fmask.fp_bier_fmask);
1596 case FIB_PATH_TYPE_BIER_IMP:
1597 res = (path1->bier_imp.fp_bier_imp -
1598 path2->bier_imp.fp_bier_imp);
1600 case FIB_PATH_TYPE_BIER_TABLE:
1601 res = bier_table_id_cmp(&path1->bier_table.fp_bier_tbl,
1602 &path2->bier_table.fp_bier_tbl);
1604 case FIB_PATH_TYPE_DEAG:
1605 res = (path1->deag.fp_tbl_id - path2->deag.fp_tbl_id);
1608 res = (path1->deag.fp_rpf_id - path2->deag.fp_rpf_id);
1611 case FIB_PATH_TYPE_INTF_RX:
1612 res = (path1->intf_rx.fp_interface - path2->intf_rx.fp_interface);
1614 case FIB_PATH_TYPE_UDP_ENCAP:
1615 res = (path1->udp_encap.fp_udp_encap_id - path2->udp_encap.fp_udp_encap_id);
1617 case FIB_PATH_TYPE_DVR:
1618 res = (path1->dvr.fp_interface - path2->dvr.fp_interface);
1620 case FIB_PATH_TYPE_EXCLUSIVE:
1621 res = dpo_cmp(&path1->exclusive.fp_ex_dpo, &path2->exclusive.fp_ex_dpo);
1623 case FIB_PATH_TYPE_SPECIAL:
1624 case FIB_PATH_TYPE_RECEIVE:
1633 * fib_path_cmp_for_sort
1635 * Compare two paths for equivalence. Used during path sorting.
1636 * As usual 0 means equal.
1639 fib_path_cmp_for_sort (void * v1,
1642 fib_node_index_t *pi1 = v1, *pi2 = v2;
1643 fib_path_t *path1, *path2;
1645 path1 = fib_path_get(*pi1);
1646 path2 = fib_path_get(*pi2);
1649 * when sorting paths we want the highest preference paths
1650 * first, so that the choices set built is in prefernce order
1652 if (path1->fp_preference != path2->fp_preference)
1654 return (path1->fp_preference - path2->fp_preference);
1657 return (fib_path_cmp_i(path1, path2));
1663 * Compare two paths for equivalence.
1666 fib_path_cmp (fib_node_index_t pi1,
1667 fib_node_index_t pi2)
1669 fib_path_t *path1, *path2;
1671 path1 = fib_path_get(pi1);
1672 path2 = fib_path_get(pi2);
1674 return (fib_path_cmp_i(path1, path2));
1678 fib_path_cmp_w_route_path (fib_node_index_t path_index,
1679 const fib_route_path_t *rpath)
1684 path = fib_path_get(path_index);
1688 if (path->fp_weight != rpath->frp_weight)
1690 res = (path->fp_weight - rpath->frp_weight);
1695 * both paths are of the same type.
1696 * consider each type and its attributes in turn.
1698 switch (path->fp_type)
1700 case FIB_PATH_TYPE_ATTACHED_NEXT_HOP:
1701 res = ip46_address_cmp(&path->attached_next_hop.fp_nh,
1705 res = (path->attached_next_hop.fp_interface -
1706 rpath->frp_sw_if_index);
1709 case FIB_PATH_TYPE_ATTACHED:
1710 res = (path->attached.fp_interface - rpath->frp_sw_if_index);
1712 case FIB_PATH_TYPE_RECURSIVE:
1713 if (DPO_PROTO_MPLS == path->fp_nh_proto)
1715 res = path->recursive.fp_nh.fp_local_label - rpath->frp_local_label;
1719 res = path->recursive.fp_nh.fp_eos - rpath->frp_eos;
1724 res = ip46_address_cmp(&path->recursive.fp_nh.fp_ip,
1730 res = (path->recursive.fp_tbl_id - rpath->frp_fib_index);
1733 case FIB_PATH_TYPE_BIER_FMASK:
1734 res = (path->bier_fmask.fp_bier_fmask - rpath->frp_bier_fmask);
1736 case FIB_PATH_TYPE_BIER_IMP:
1737 res = (path->bier_imp.fp_bier_imp - rpath->frp_bier_imp);
1739 case FIB_PATH_TYPE_BIER_TABLE:
1740 res = bier_table_id_cmp(&path->bier_table.fp_bier_tbl,
1741 &rpath->frp_bier_tbl);
1743 case FIB_PATH_TYPE_INTF_RX:
1744 res = (path->intf_rx.fp_interface - rpath->frp_sw_if_index);
1746 case FIB_PATH_TYPE_UDP_ENCAP:
1747 res = (path->udp_encap.fp_udp_encap_id - rpath->frp_udp_encap_id);
1749 case FIB_PATH_TYPE_DEAG:
1750 res = (path->deag.fp_tbl_id - rpath->frp_fib_index);
1753 res = (path->deag.fp_rpf_id - rpath->frp_rpf_id);
1756 case FIB_PATH_TYPE_DVR:
1757 res = (path->dvr.fp_interface - rpath->frp_sw_if_index);
1759 case FIB_PATH_TYPE_EXCLUSIVE:
1760 res = dpo_cmp(&path->exclusive.fp_ex_dpo, &rpath->dpo);
1762 case FIB_PATH_TYPE_RECEIVE:
1763 if (rpath->frp_flags & FIB_ROUTE_PATH_LOCAL)
1772 case FIB_PATH_TYPE_SPECIAL:
1781 * fib_path_recursive_loop_detect
1783 * A forward walk of the FIB object graph to detect for a cycle/loop. This
1784 * walk is initiated when an entry is linking to a new path list or from an old.
1785 * The entry vector passed contains all the FIB entrys that are children of this
1786 * path (it is all the entries encountered on the walk so far). If this vector
1787 * contains the entry this path resolve via, then a loop is about to form.
1788 * The loop must be allowed to form, since we need the dependencies in place
1789 * so that we can track when the loop breaks.
1790 * However, we MUST not produce a loop in the forwarding graph (else packets
1791 * would loop around the switch path until the loop breaks), so we mark recursive
1792 * paths as looped so that they do not contribute forwarding information.
1793 * By marking the path as looped, an etry such as;
1795 * via a.a.a.a (looped)
1796 * via b.b.b.b (not looped)
1797 * can still forward using the info provided by b.b.b.b only
1800 fib_path_recursive_loop_detect (fib_node_index_t path_index,
1801 fib_node_index_t **entry_indicies)
1805 path = fib_path_get(path_index);
1808 * the forced drop path is never looped, cos it is never resolved.
1810 if (fib_path_is_permanent_drop(path))
1815 switch (path->fp_type)
1817 case FIB_PATH_TYPE_RECURSIVE:
1819 fib_node_index_t *entry_index, *entries;
1821 entries = *entry_indicies;
1823 vec_foreach(entry_index, entries) {
1824 if (*entry_index == path->fp_via_fib)
1827 * the entry that is about to link to this path-list (or
1828 * one of this path-list's children) is the same entry that
1829 * this recursive path resolves through. this is a cycle.
1839 FIB_PATH_DBG(path, "recursive loop formed");
1840 path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RECURSIVE_LOOP;
1842 dpo_copy(&path->fp_dpo, drop_dpo_get(path->fp_nh_proto));
1847 * no loop here yet. keep forward walking the graph.
1849 if (fib_entry_recursive_loop_detect(path->fp_via_fib, entry_indicies))
1851 FIB_PATH_DBG(path, "recursive loop formed");
1852 path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RECURSIVE_LOOP;
1856 FIB_PATH_DBG(path, "recursive loop cleared");
1857 path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RECURSIVE_LOOP;
1862 case FIB_PATH_TYPE_ATTACHED_NEXT_HOP:
1863 case FIB_PATH_TYPE_ATTACHED:
1864 if (dpo_is_adj(&path->fp_dpo) &&
1865 adj_recursive_loop_detect(path->fp_dpo.dpoi_index,
1868 FIB_PATH_DBG(path, "recursive loop formed");
1869 path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RECURSIVE_LOOP;
1873 FIB_PATH_DBG(path, "recursive loop cleared");
1874 path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RECURSIVE_LOOP;
1877 case FIB_PATH_TYPE_SPECIAL:
1878 case FIB_PATH_TYPE_DEAG:
1879 case FIB_PATH_TYPE_DVR:
1880 case FIB_PATH_TYPE_RECEIVE:
1881 case FIB_PATH_TYPE_INTF_RX:
1882 case FIB_PATH_TYPE_UDP_ENCAP:
1883 case FIB_PATH_TYPE_EXCLUSIVE:
1884 case FIB_PATH_TYPE_BIER_FMASK:
1885 case FIB_PATH_TYPE_BIER_TABLE:
1886 case FIB_PATH_TYPE_BIER_IMP:
1888 * these path types cannot be part of a loop, since they are the leaves
1894 return (fib_path_is_looped(path_index));
1898 fib_path_resolve (fib_node_index_t path_index)
1902 path = fib_path_get(path_index);
1905 * hope for the best.
1907 path->fp_oper_flags |= FIB_PATH_OPER_FLAG_RESOLVED;
1910 * the forced drop path resolves via the drop adj
1912 if (fib_path_is_permanent_drop(path))
1914 dpo_copy(&path->fp_dpo, drop_dpo_get(path->fp_nh_proto));
1915 path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED;
1916 return (fib_path_is_resolved(path_index));
1919 switch (path->fp_type)
1921 case FIB_PATH_TYPE_ATTACHED_NEXT_HOP:
1922 fib_path_attached_next_hop_set(path);
1924 case FIB_PATH_TYPE_ATTACHED:
1926 dpo_id_t tmp = DPO_INVALID;
1929 * path->attached.fp_interface
1931 if (!vnet_sw_interface_is_up(vnet_get_main(),
1932 path->attached.fp_interface))
1934 path->fp_oper_flags &= ~FIB_PATH_OPER_FLAG_RESOLVED;
1936 fib_path_attached_get_adj(path,
1937 dpo_proto_to_link(path->fp_nh_proto),
1941 * re-fetch after possible mem realloc
1943 path = fib_path_get(path_index);
1944 dpo_copy(&path->fp_dpo, &tmp);
1947 * become a child of the adjacency so we receive updates
1948 * when the interface state changes
1950 if (dpo_is_adj(&path->fp_dpo))
1952 path->fp_sibling = adj_child_add(path->fp_dpo.dpoi_index,
1954 fib_path_get_index(path));
1959 case FIB_PATH_TYPE_RECURSIVE:
1962 * Create a RR source entry in the table for the address
1963 * that this path recurses through.
1964 * This resolve action is recursive, hence we may create
1965 * more paths in the process. more creates mean maybe realloc
1968 fib_node_index_t fei;
1971 ASSERT(FIB_NODE_INDEX_INVALID == path->fp_via_fib);
1973 if (DPO_PROTO_MPLS == path->fp_nh_proto)
1975 fib_prefix_from_mpls_label(path->recursive.fp_nh.fp_local_label,
1976 path->recursive.fp_nh.fp_eos,
1981 fib_prefix_from_ip46_addr(&path->recursive.fp_nh.fp_ip, &pfx);
1984 fib_table_lock(path->recursive.fp_tbl_id,
1985 dpo_proto_to_fib(path->fp_nh_proto),
1987 fei = fib_table_entry_special_add(path->recursive.fp_tbl_id,
1990 FIB_ENTRY_FLAG_NONE);
1992 path = fib_path_get(path_index);
1993 path->fp_via_fib = fei;
1996 * become a dependent child of the entry so the path is
1997 * informed when the forwarding for the entry changes.
1999 path->fp_sibling = fib_entry_child_add(path->fp_via_fib,
2001 fib_path_get_index(path));
2004 * create and configure the IP DPO
2006 fib_path_recursive_adj_update(
2008 fib_path_to_chain_type(path),
2013 case FIB_PATH_TYPE_BIER_FMASK:
2016 * become a dependent child of the entry so the path is
2017 * informed when the forwarding for the entry changes.
2019 path->fp_sibling = bier_fmask_child_add(path->bier_fmask.fp_bier_fmask,
2021 fib_path_get_index(path));
2023 path->fp_via_bier_fmask = path->bier_fmask.fp_bier_fmask;
2024 fib_path_bier_fmask_update(path, &path->fp_dpo);
2028 case FIB_PATH_TYPE_BIER_IMP:
2029 bier_imp_lock(path->bier_imp.fp_bier_imp);
2030 bier_imp_contribute_forwarding(path->bier_imp.fp_bier_imp,
2034 case FIB_PATH_TYPE_BIER_TABLE:
2037 * Find/create the BIER table to link to
2039 ASSERT(FIB_NODE_INDEX_INVALID == path->fp_via_bier_tbl);
2041 path->fp_via_bier_tbl =
2042 bier_table_ecmp_create_and_lock(&path->bier_table.fp_bier_tbl);
2044 bier_table_contribute_forwarding(path->fp_via_bier_tbl,
2048 case FIB_PATH_TYPE_SPECIAL:
2049 if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_ICMP_PROHIBIT)
2051 ip_null_dpo_add_and_lock (path->fp_nh_proto,
2052 IP_NULL_ACTION_SEND_ICMP_PROHIBIT,
2055 else if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_ICMP_UNREACH)
2057 ip_null_dpo_add_and_lock (path->fp_nh_proto,
2058 IP_NULL_ACTION_SEND_ICMP_UNREACH,
2061 else if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_CLASSIFY)
2063 dpo_set (&path->fp_dpo, DPO_CLASSIFY,
2065 classify_dpo_create (path->fp_nh_proto,
2066 path->classify.fp_classify_table_id));
2071 * Resolve via the drop
2073 dpo_copy(&path->fp_dpo, drop_dpo_get(path->fp_nh_proto));
2076 case FIB_PATH_TYPE_DEAG:
2078 if (DPO_PROTO_BIER == path->fp_nh_proto)
2080 bier_disp_table_contribute_forwarding(path->deag.fp_tbl_id,
2086 * Resolve via a lookup DPO.
2087 * FIXME. control plane should add routes with a table ID
2089 lookup_input_t input;
2092 cast = (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_RPF_ID ?
2095 input = (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_DEAG_SRC ?
2096 LOOKUP_INPUT_SRC_ADDR :
2097 LOOKUP_INPUT_DST_ADDR);
2099 lookup_dpo_add_or_lock_w_fib_index(path->deag.fp_tbl_id,
2103 LOOKUP_TABLE_FROM_CONFIG,
2108 case FIB_PATH_TYPE_DVR:
2109 dvr_dpo_add_or_lock(path->dvr.fp_interface,
2113 case FIB_PATH_TYPE_RECEIVE:
2115 * Resolve via a receive DPO.
2117 receive_dpo_add_or_lock(path->fp_nh_proto,
2118 path->receive.fp_interface,
2119 &path->receive.fp_addr,
2122 case FIB_PATH_TYPE_UDP_ENCAP:
2123 udp_encap_lock(path->udp_encap.fp_udp_encap_id);
2124 udp_encap_contribute_forwarding(path->udp_encap.fp_udp_encap_id,
2128 case FIB_PATH_TYPE_INTF_RX: {
2130 * Resolve via a receive DPO.
2132 interface_rx_dpo_add_or_lock(path->fp_nh_proto,
2133 path->intf_rx.fp_interface,
2137 case FIB_PATH_TYPE_EXCLUSIVE:
2139 * Resolve via the user provided DPO
2141 dpo_copy(&path->fp_dpo, &path->exclusive.fp_ex_dpo);
2145 return (fib_path_is_resolved(path_index));
2149 fib_path_get_resolving_interface (fib_node_index_t path_index)
2153 path = fib_path_get(path_index);
2155 switch (path->fp_type)
2157 case FIB_PATH_TYPE_ATTACHED_NEXT_HOP:
2158 return (path->attached_next_hop.fp_interface);
2159 case FIB_PATH_TYPE_ATTACHED:
2160 return (path->attached.fp_interface);
2161 case FIB_PATH_TYPE_RECEIVE:
2162 return (path->receive.fp_interface);
2163 case FIB_PATH_TYPE_RECURSIVE:
2164 if (fib_path_is_resolved(path_index))
2166 return (fib_entry_get_resolving_interface(path->fp_via_fib));
2169 case FIB_PATH_TYPE_DVR:
2170 return (path->dvr.fp_interface);
2171 case FIB_PATH_TYPE_INTF_RX:
2172 case FIB_PATH_TYPE_UDP_ENCAP:
2173 case FIB_PATH_TYPE_SPECIAL:
2174 case FIB_PATH_TYPE_DEAG:
2175 case FIB_PATH_TYPE_EXCLUSIVE:
2176 case FIB_PATH_TYPE_BIER_FMASK:
2177 case FIB_PATH_TYPE_BIER_TABLE:
2178 case FIB_PATH_TYPE_BIER_IMP:
2181 return (dpo_get_urpf(&path->fp_dpo));
2185 fib_path_get_resolving_index (fib_node_index_t path_index)
2189 path = fib_path_get(path_index);
2191 switch (path->fp_type)
2193 case FIB_PATH_TYPE_ATTACHED_NEXT_HOP:
2194 case FIB_PATH_TYPE_ATTACHED:
2195 case FIB_PATH_TYPE_RECEIVE:
2196 case FIB_PATH_TYPE_INTF_RX:
2197 case FIB_PATH_TYPE_SPECIAL:
2198 case FIB_PATH_TYPE_DEAG:
2199 case FIB_PATH_TYPE_DVR:
2200 case FIB_PATH_TYPE_EXCLUSIVE:
2202 case FIB_PATH_TYPE_UDP_ENCAP:
2203 return (path->udp_encap.fp_udp_encap_id);
2204 case FIB_PATH_TYPE_RECURSIVE:
2205 return (path->fp_via_fib);
2206 case FIB_PATH_TYPE_BIER_FMASK:
2207 return (path->bier_fmask.fp_bier_fmask);
2208 case FIB_PATH_TYPE_BIER_TABLE:
2209 return (path->fp_via_bier_tbl);
2210 case FIB_PATH_TYPE_BIER_IMP:
2211 return (path->bier_imp.fp_bier_imp);
2217 fib_path_get_adj (fib_node_index_t path_index)
2221 path = fib_path_get(path_index);
2223 if (dpo_is_adj(&path->fp_dpo))
2225 return (path->fp_dpo.dpoi_index);
2227 return (ADJ_INDEX_INVALID);
2231 fib_path_get_weight (fib_node_index_t path_index)
2235 path = fib_path_get(path_index);
2239 return (path->fp_weight);
2243 fib_path_get_preference (fib_node_index_t path_index)
2247 path = fib_path_get(path_index);
2251 return (path->fp_preference);
2255 fib_path_get_rpf_id (fib_node_index_t path_index)
2259 path = fib_path_get(path_index);
2263 if (FIB_PATH_CFG_FLAG_RPF_ID & path->fp_cfg_flags)
2265 return (path->deag.fp_rpf_id);
2272 * @brief Contribute the path's adjacency to the list passed.
2273 * By calling this function over all paths, recursively, a child
2274 * can construct its full set of forwarding adjacencies, and hence its
2278 fib_path_contribute_urpf (fib_node_index_t path_index,
2283 path = fib_path_get(path_index);
2286 * resolved and unresolved paths contribute to the RPF list.
2288 switch (path->fp_type)
2290 case FIB_PATH_TYPE_ATTACHED_NEXT_HOP:
2291 fib_urpf_list_append(urpf, path->attached_next_hop.fp_interface);
2294 case FIB_PATH_TYPE_ATTACHED:
2295 fib_urpf_list_append(urpf, path->attached.fp_interface);
2298 case FIB_PATH_TYPE_RECURSIVE:
2299 if (FIB_NODE_INDEX_INVALID != path->fp_via_fib &&
2300 !fib_path_is_looped(path_index))
2303 * there's unresolved due to constraints, and there's unresolved
2304 * due to ain't got no via. can't do nowt w'out via.
2306 fib_entry_contribute_urpf(path->fp_via_fib, urpf);
2310 case FIB_PATH_TYPE_EXCLUSIVE:
2311 case FIB_PATH_TYPE_SPECIAL:
2314 * these path types may link to an adj, if that's what
2317 u32 rpf_sw_if_index;
2319 rpf_sw_if_index = dpo_get_urpf(&path->fp_dpo);
2321 if (~0 != rpf_sw_if_index)
2323 fib_urpf_list_append(urpf, rpf_sw_if_index);
2327 case FIB_PATH_TYPE_DVR:
2328 fib_urpf_list_append(urpf, path->dvr.fp_interface);
2330 case FIB_PATH_TYPE_DEAG:
2331 case FIB_PATH_TYPE_RECEIVE:
2332 case FIB_PATH_TYPE_INTF_RX:
2333 case FIB_PATH_TYPE_UDP_ENCAP:
2334 case FIB_PATH_TYPE_BIER_FMASK:
2335 case FIB_PATH_TYPE_BIER_TABLE:
2336 case FIB_PATH_TYPE_BIER_IMP:
2338 * these path types don't link to an adj
2345 fib_path_stack_mpls_disp (fib_node_index_t path_index,
2346 dpo_proto_t payload_proto,
2347 fib_mpls_lsp_mode_t mode,
2352 path = fib_path_get(path_index);
2356 switch (path->fp_type)
2358 case FIB_PATH_TYPE_ATTACHED_NEXT_HOP:
2360 dpo_id_t tmp = DPO_INVALID;
2362 dpo_copy(&tmp, dpo);
2364 mpls_disp_dpo_create(payload_proto, ~0, mode, &tmp, dpo);
2368 case FIB_PATH_TYPE_DEAG:
2370 dpo_id_t tmp = DPO_INVALID;
2372 dpo_copy(&tmp, dpo);
2374 mpls_disp_dpo_create(payload_proto,
2375 path->deag.fp_rpf_id,
2380 case FIB_PATH_TYPE_RECEIVE:
2381 case FIB_PATH_TYPE_ATTACHED:
2382 case FIB_PATH_TYPE_RECURSIVE:
2383 case FIB_PATH_TYPE_INTF_RX:
2384 case FIB_PATH_TYPE_UDP_ENCAP:
2385 case FIB_PATH_TYPE_EXCLUSIVE:
2386 case FIB_PATH_TYPE_SPECIAL:
2387 case FIB_PATH_TYPE_BIER_FMASK:
2388 case FIB_PATH_TYPE_BIER_TABLE:
2389 case FIB_PATH_TYPE_BIER_IMP:
2390 case FIB_PATH_TYPE_DVR:
2394 if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_POP_PW_CW)
2396 dpo_id_t tmp = DPO_INVALID;
2398 dpo_copy(&tmp, dpo);
2400 pw_cw_dpo_create(&tmp, dpo);
2406 fib_path_contribute_forwarding (fib_node_index_t path_index,
2407 fib_forward_chain_type_t fct,
2412 path = fib_path_get(path_index);
2415 ASSERT(FIB_FORW_CHAIN_TYPE_MPLS_EOS != fct);
2418 * The DPO stored in the path was created when the path was resolved.
2419 * This then represents the path's 'native' protocol; IP.
2420 * For all others will need to go find something else.
2422 if (fib_path_to_chain_type(path) == fct)
2424 dpo_copy(dpo, &path->fp_dpo);
2428 switch (path->fp_type)
2430 case FIB_PATH_TYPE_ATTACHED_NEXT_HOP:
2433 case FIB_FORW_CHAIN_TYPE_UNICAST_IP4:
2434 case FIB_FORW_CHAIN_TYPE_UNICAST_IP6:
2435 case FIB_FORW_CHAIN_TYPE_MPLS_EOS:
2436 case FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS:
2437 case FIB_FORW_CHAIN_TYPE_ETHERNET:
2438 case FIB_FORW_CHAIN_TYPE_NSH:
2439 case FIB_FORW_CHAIN_TYPE_MCAST_IP4:
2440 case FIB_FORW_CHAIN_TYPE_MCAST_IP6:
2441 path = fib_path_attached_next_hop_get_adj(
2443 fib_forw_chain_type_to_link_type(fct),
2446 case FIB_FORW_CHAIN_TYPE_BIER:
2450 case FIB_PATH_TYPE_RECURSIVE:
2453 case FIB_FORW_CHAIN_TYPE_MPLS_EOS:
2454 case FIB_FORW_CHAIN_TYPE_UNICAST_IP4:
2455 case FIB_FORW_CHAIN_TYPE_UNICAST_IP6:
2456 case FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS:
2457 case FIB_FORW_CHAIN_TYPE_MCAST_IP4:
2458 case FIB_FORW_CHAIN_TYPE_MCAST_IP6:
2459 case FIB_FORW_CHAIN_TYPE_BIER:
2460 fib_path_recursive_adj_update(path, fct, dpo);
2462 case FIB_FORW_CHAIN_TYPE_ETHERNET:
2463 case FIB_FORW_CHAIN_TYPE_NSH:
2468 case FIB_PATH_TYPE_BIER_TABLE:
2471 case FIB_FORW_CHAIN_TYPE_BIER:
2472 bier_table_contribute_forwarding(path->fp_via_bier_tbl, dpo);
2474 case FIB_FORW_CHAIN_TYPE_MPLS_EOS:
2475 case FIB_FORW_CHAIN_TYPE_UNICAST_IP4:
2476 case FIB_FORW_CHAIN_TYPE_UNICAST_IP6:
2477 case FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS:
2478 case FIB_FORW_CHAIN_TYPE_MCAST_IP4:
2479 case FIB_FORW_CHAIN_TYPE_MCAST_IP6:
2480 case FIB_FORW_CHAIN_TYPE_ETHERNET:
2481 case FIB_FORW_CHAIN_TYPE_NSH:
2486 case FIB_PATH_TYPE_BIER_FMASK:
2489 case FIB_FORW_CHAIN_TYPE_BIER:
2490 fib_path_bier_fmask_update(path, dpo);
2492 case FIB_FORW_CHAIN_TYPE_MPLS_EOS:
2493 case FIB_FORW_CHAIN_TYPE_UNICAST_IP4:
2494 case FIB_FORW_CHAIN_TYPE_UNICAST_IP6:
2495 case FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS:
2496 case FIB_FORW_CHAIN_TYPE_MCAST_IP4:
2497 case FIB_FORW_CHAIN_TYPE_MCAST_IP6:
2498 case FIB_FORW_CHAIN_TYPE_ETHERNET:
2499 case FIB_FORW_CHAIN_TYPE_NSH:
2504 case FIB_PATH_TYPE_BIER_IMP:
2505 bier_imp_contribute_forwarding(path->bier_imp.fp_bier_imp,
2506 fib_forw_chain_type_to_dpo_proto(fct),
2509 case FIB_PATH_TYPE_DEAG:
2512 case FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS:
2513 lookup_dpo_add_or_lock_w_table_id(MPLS_FIB_DEFAULT_TABLE_ID,
2516 LOOKUP_INPUT_DST_ADDR,
2517 LOOKUP_TABLE_FROM_CONFIG,
2520 case FIB_FORW_CHAIN_TYPE_MPLS_EOS:
2521 case FIB_FORW_CHAIN_TYPE_UNICAST_IP4:
2522 case FIB_FORW_CHAIN_TYPE_UNICAST_IP6:
2523 case FIB_FORW_CHAIN_TYPE_MCAST_IP4:
2524 case FIB_FORW_CHAIN_TYPE_MCAST_IP6:
2525 dpo_copy(dpo, &path->fp_dpo);
2527 case FIB_FORW_CHAIN_TYPE_BIER:
2529 case FIB_FORW_CHAIN_TYPE_ETHERNET:
2530 case FIB_FORW_CHAIN_TYPE_NSH:
2535 case FIB_PATH_TYPE_EXCLUSIVE:
2536 dpo_copy(dpo, &path->exclusive.fp_ex_dpo);
2538 case FIB_PATH_TYPE_ATTACHED:
2541 case FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS:
2542 case FIB_FORW_CHAIN_TYPE_UNICAST_IP4:
2543 case FIB_FORW_CHAIN_TYPE_UNICAST_IP6:
2544 case FIB_FORW_CHAIN_TYPE_MPLS_EOS:
2545 case FIB_FORW_CHAIN_TYPE_ETHERNET:
2546 case FIB_FORW_CHAIN_TYPE_NSH:
2547 case FIB_FORW_CHAIN_TYPE_BIER:
2548 fib_path_attached_get_adj(path,
2549 fib_forw_chain_type_to_link_type(fct),
2552 case FIB_FORW_CHAIN_TYPE_MCAST_IP4:
2553 case FIB_FORW_CHAIN_TYPE_MCAST_IP6:
2558 * Create the adj needed for sending IP multicast traffic
2560 if (vnet_sw_interface_is_p2p(vnet_get_main(),
2561 path->attached.fp_interface))
2564 * point-2-point interfaces do not require a glean, since
2565 * there is nothing to ARP. Install a rewrite/nbr adj instead
2567 ai = adj_nbr_add_or_lock(dpo_proto_to_fib(path->fp_nh_proto),
2568 fib_forw_chain_type_to_link_type(fct),
2570 path->attached.fp_interface);
2574 ai = adj_mcast_add_or_lock(dpo_proto_to_fib(path->fp_nh_proto),
2575 fib_forw_chain_type_to_link_type(fct),
2576 path->attached.fp_interface);
2578 dpo_set(dpo, DPO_ADJACENCY,
2579 fib_forw_chain_type_to_dpo_proto(fct),
2586 case FIB_PATH_TYPE_INTF_RX:
2588 * Create the adj needed for sending IP multicast traffic
2590 interface_rx_dpo_add_or_lock(fib_forw_chain_type_to_dpo_proto(fct),
2591 path->attached.fp_interface,
2594 case FIB_PATH_TYPE_UDP_ENCAP:
2595 udp_encap_contribute_forwarding(path->udp_encap.fp_udp_encap_id,
2599 case FIB_PATH_TYPE_RECEIVE:
2600 case FIB_PATH_TYPE_SPECIAL:
2601 case FIB_PATH_TYPE_DVR:
2602 dpo_copy(dpo, &path->fp_dpo);
2608 load_balance_path_t *
2609 fib_path_append_nh_for_multipath_hash (fib_node_index_t path_index,
2610 fib_forward_chain_type_t fct,
2611 load_balance_path_t *hash_key)
2613 load_balance_path_t *mnh;
2616 path = fib_path_get(path_index);
2620 vec_add2(hash_key, mnh, 1);
2622 mnh->path_weight = path->fp_weight;
2623 mnh->path_index = path_index;
2625 if (fib_path_is_resolved(path_index))
2627 fib_path_contribute_forwarding(path_index, fct, &mnh->path_dpo);
2631 dpo_copy(&mnh->path_dpo,
2632 drop_dpo_get(fib_forw_chain_type_to_dpo_proto(fct)));
2638 fib_path_is_recursive_constrained (fib_node_index_t path_index)
2642 path = fib_path_get(path_index);
2644 return ((FIB_PATH_TYPE_RECURSIVE == path->fp_type) &&
2645 ((path->fp_cfg_flags & FIB_PATH_CFG_FLAG_RESOLVE_ATTACHED) ||
2646 (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_RESOLVE_HOST)));
2650 fib_path_is_exclusive (fib_node_index_t path_index)
2654 path = fib_path_get(path_index);
2656 return (FIB_PATH_TYPE_EXCLUSIVE == path->fp_type);
2660 fib_path_is_deag (fib_node_index_t path_index)
2664 path = fib_path_get(path_index);
2666 return (FIB_PATH_TYPE_DEAG == path->fp_type);
2670 fib_path_is_resolved (fib_node_index_t path_index)
2674 path = fib_path_get(path_index);
2676 return (dpo_id_is_valid(&path->fp_dpo) &&
2677 (path->fp_oper_flags & FIB_PATH_OPER_FLAG_RESOLVED) &&
2678 !fib_path_is_looped(path_index) &&
2679 !fib_path_is_permanent_drop(path));
2683 fib_path_is_looped (fib_node_index_t path_index)
2687 path = fib_path_get(path_index);
2689 return (path->fp_oper_flags & FIB_PATH_OPER_FLAG_RECURSIVE_LOOP);
2692 fib_path_list_walk_rc_t
2693 fib_path_encode (fib_node_index_t path_list_index,
2694 fib_node_index_t path_index,
2695 const fib_path_ext_t *path_ext,
2698 fib_path_encode_ctx_t *ctx = args;
2699 fib_route_path_t *rpath;
2702 path = fib_path_get(path_index);
2704 return (FIB_PATH_LIST_WALK_CONTINUE);
2706 vec_add2(ctx->rpaths, rpath, 1);
2707 rpath->frp_weight = path->fp_weight;
2708 rpath->frp_preference = path->fp_preference;
2709 rpath->frp_proto = path->fp_nh_proto;
2710 rpath->frp_sw_if_index = ~0;
2711 rpath->frp_fib_index = 0;
2713 switch (path->fp_type)
2715 case FIB_PATH_TYPE_RECEIVE:
2716 rpath->frp_addr = path->receive.fp_addr;
2717 rpath->frp_sw_if_index = path->receive.fp_interface;
2718 rpath->frp_flags |= FIB_ROUTE_PATH_LOCAL;
2720 case FIB_PATH_TYPE_ATTACHED:
2721 rpath->frp_sw_if_index = path->attached.fp_interface;
2723 case FIB_PATH_TYPE_ATTACHED_NEXT_HOP:
2724 rpath->frp_sw_if_index = path->attached_next_hop.fp_interface;
2725 rpath->frp_addr = path->attached_next_hop.fp_nh;
2727 case FIB_PATH_TYPE_BIER_FMASK:
2728 rpath->frp_bier_fmask = path->bier_fmask.fp_bier_fmask;
2730 case FIB_PATH_TYPE_SPECIAL:
2732 case FIB_PATH_TYPE_DEAG:
2733 rpath->frp_fib_index = path->deag.fp_tbl_id;
2734 if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_RPF_ID)
2736 rpath->frp_flags |= FIB_ROUTE_PATH_RPF_ID;
2739 case FIB_PATH_TYPE_RECURSIVE:
2740 rpath->frp_addr = path->recursive.fp_nh.fp_ip;
2741 rpath->frp_fib_index = path->recursive.fp_tbl_id;
2743 case FIB_PATH_TYPE_DVR:
2744 rpath->frp_sw_if_index = path->dvr.fp_interface;
2745 rpath->frp_flags |= FIB_ROUTE_PATH_DVR;
2747 case FIB_PATH_TYPE_UDP_ENCAP:
2748 rpath->frp_udp_encap_id = path->udp_encap.fp_udp_encap_id;
2749 rpath->frp_flags |= FIB_ROUTE_PATH_UDP_ENCAP;
2751 case FIB_PATH_TYPE_INTF_RX:
2752 rpath->frp_sw_if_index = path->receive.fp_interface;
2753 rpath->frp_flags |= FIB_ROUTE_PATH_INTF_RX;
2755 case FIB_PATH_TYPE_EXCLUSIVE:
2756 rpath->frp_flags |= FIB_ROUTE_PATH_EXCLUSIVE;
2761 if (path_ext && path_ext->fpe_type == FIB_PATH_EXT_MPLS)
2763 rpath->frp_label_stack = path_ext->fpe_path.frp_label_stack;
2766 if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_DROP)
2767 rpath->frp_flags |= FIB_ROUTE_PATH_DROP;
2768 if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_ICMP_UNREACH)
2769 rpath->frp_flags |= FIB_ROUTE_PATH_ICMP_UNREACH;
2770 if (path->fp_cfg_flags & FIB_PATH_CFG_FLAG_ICMP_PROHIBIT)
2771 rpath->frp_flags |= FIB_ROUTE_PATH_ICMP_PROHIBIT;
2773 return (FIB_PATH_LIST_WALK_CONTINUE);
2777 fib_path_get_proto (fib_node_index_t path_index)
2781 path = fib_path_get(path_index);
2783 return (path->fp_nh_proto);
2787 fib_path_module_init (void)
2789 fib_node_register_type (FIB_NODE_TYPE_PATH, &fib_path_vft);
2790 fib_path_logger = vlib_log_register_class ("fib", "path");
2793 static clib_error_t *
2794 show_fib_path_command (vlib_main_t * vm,
2795 unformat_input_t * input,
2796 vlib_cli_command_t * cmd)
2798 fib_node_index_t pi;
2801 if (unformat (input, "%d", &pi))
2804 * show one in detail
2806 if (!pool_is_free_index(fib_path_pool, pi))
2808 path = fib_path_get(pi);
2809 u8 *s = format(NULL, "%U", format_fib_path, pi, 1,
2810 FIB_PATH_FORMAT_FLAGS_NONE);
2811 s = format(s, "\n children:");
2812 s = fib_node_children_format(path->fp_node.fn_children, s);
2813 vlib_cli_output (vm, "%v", s);
2818 vlib_cli_output (vm, "path %d invalid", pi);
2823 vlib_cli_output (vm, "FIB Paths");
2824 pool_foreach_index (pi, fib_path_pool,
2826 vlib_cli_output (vm, "%U", format_fib_path, pi, 0,
2827 FIB_PATH_FORMAT_FLAGS_NONE);
2834 VLIB_CLI_COMMAND (show_fib_path, static) = {
2835 .path = "show fib paths",
2836 .function = show_fib_path_command,
2837 .short_help = "show fib paths",