2 * Copyright (C) 2013 Cumulus Networks, Inc.
4 * This file is part of GNU Zebra.
6 * GNU Zebra is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2, or (at your option) any
11 * GNU Zebra is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
16 * You should have received a copy of the GNU General Public License along
17 * with this program; see the file COPYING; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
29 #include "sockunion.h"
32 #include "workqueue.h"
37 #include "termtable.h"
40 #include "zebra/rib.h"
42 #include "zebra/interface.h"
43 #include "zebra/zserv.h"
44 #include "zebra/zebra_router.h"
45 #include "zebra/redistribute.h"
46 #include "zebra/debug.h"
47 #include "zebra/zebra_vrf.h"
48 #include "zebra/zebra_mpls.h"
49 #include "zebra/zebra_srte.h"
50 #include "zebra/zebra_errors.h"
52 DEFINE_MTYPE_STATIC(ZEBRA
, LSP
, "MPLS LSP object");
53 DEFINE_MTYPE_STATIC(ZEBRA
, FEC
, "MPLS FEC object");
54 DEFINE_MTYPE_STATIC(ZEBRA
, NHLFE
, "MPLS nexthop object");
58 /* static function declarations */
60 static void fec_evaluate(struct zebra_vrf
*zvrf
);
61 static uint32_t fec_derive_label_from_index(struct zebra_vrf
*vrf
,
63 static int lsp_install(struct zebra_vrf
*zvrf
, mpls_label_t label
,
64 struct route_node
*rn
, struct route_entry
*re
);
65 static int lsp_uninstall(struct zebra_vrf
*zvrf
, mpls_label_t label
);
66 static int fec_change_update_lsp(struct zebra_vrf
*zvrf
, zebra_fec_t
*fec
,
67 mpls_label_t old_label
);
68 static int fec_send(zebra_fec_t
*fec
, struct zserv
*client
);
69 static void fec_update_clients(zebra_fec_t
*fec
);
70 static void fec_print(zebra_fec_t
*fec
, struct vty
*vty
);
71 static zebra_fec_t
*fec_find(struct route_table
*table
, struct prefix
*p
);
72 static zebra_fec_t
*fec_add(struct route_table
*table
, struct prefix
*p
,
73 mpls_label_t label
, uint32_t flags
,
74 uint32_t label_index
);
75 static int fec_del(zebra_fec_t
*fec
);
77 static unsigned int label_hash(const void *p
);
78 static bool label_cmp(const void *p1
, const void *p2
);
79 static int nhlfe_nexthop_active_ipv4(zebra_nhlfe_t
*nhlfe
,
80 struct nexthop
*nexthop
);
81 static int nhlfe_nexthop_active_ipv6(zebra_nhlfe_t
*nhlfe
,
82 struct nexthop
*nexthop
);
83 static int nhlfe_nexthop_active(zebra_nhlfe_t
*nhlfe
);
85 static void lsp_select_best_nhlfe(zebra_lsp_t
*lsp
);
86 static void lsp_uninstall_from_kernel(struct hash_bucket
*bucket
, void *ctxt
);
87 static void lsp_schedule(struct hash_bucket
*bucket
, void *ctxt
);
88 static wq_item_status
lsp_process(struct work_queue
*wq
, void *data
);
89 static void lsp_processq_del(struct work_queue
*wq
, void *data
);
90 static void lsp_processq_complete(struct work_queue
*wq
);
91 static int lsp_processq_add(zebra_lsp_t
*lsp
);
92 static void *lsp_alloc(void *p
);
94 /* Check whether lsp can be freed - no nhlfes, e.g., and call free api */
95 static void lsp_check_free(struct hash
*lsp_table
, zebra_lsp_t
**plsp
);
97 /* Free lsp; sets caller's pointer to NULL */
98 static void lsp_free(struct hash
*lsp_table
, zebra_lsp_t
**plsp
);
100 static char *nhlfe2str(const zebra_nhlfe_t
*nhlfe
, char *buf
, int size
);
101 static char *nhlfe_config_str(const zebra_nhlfe_t
*nhlfe
, char *buf
, int size
);
102 static int nhlfe_nhop_match(zebra_nhlfe_t
*nhlfe
, enum nexthop_types_t gtype
,
103 const union g_addr
*gate
, ifindex_t ifindex
);
104 static zebra_nhlfe_t
*nhlfe_find(struct nhlfe_list_head
*list
,
105 enum lsp_types_t lsp_type
,
106 enum nexthop_types_t gtype
,
107 const union g_addr
*gate
, ifindex_t ifindex
);
108 static zebra_nhlfe_t
*nhlfe_add(zebra_lsp_t
*lsp
, enum lsp_types_t lsp_type
,
109 enum nexthop_types_t gtype
,
110 const union g_addr
*gate
, ifindex_t ifindex
,
111 uint8_t num_labels
, const mpls_label_t
*labels
,
113 static int nhlfe_del(zebra_nhlfe_t
*nhlfe
);
114 static void nhlfe_free(zebra_nhlfe_t
*nhlfe
);
115 static void nhlfe_out_label_update(zebra_nhlfe_t
*nhlfe
,
116 struct mpls_label_stack
*nh_label
);
117 static int mpls_lsp_uninstall_all(struct hash
*lsp_table
, zebra_lsp_t
*lsp
,
118 enum lsp_types_t type
);
119 static int mpls_static_lsp_uninstall_all(struct zebra_vrf
*zvrf
,
120 mpls_label_t in_label
);
121 static void nhlfe_print(zebra_nhlfe_t
*nhlfe
, struct vty
*vty
,
123 static void lsp_print(struct vty
*vty
, zebra_lsp_t
*lsp
);
124 static void mpls_lsp_uninstall_all_type(struct hash_bucket
*bucket
, void *ctxt
);
125 static void mpls_ftn_uninstall_all(struct zebra_vrf
*zvrf
,
126 int afi
, enum lsp_types_t lsp_type
);
127 static int lsp_znh_install(zebra_lsp_t
*lsp
, enum lsp_types_t type
,
128 const struct zapi_nexthop
*znh
);
129 static int lsp_backup_znh_install(zebra_lsp_t
*lsp
, enum lsp_types_t type
,
130 const struct zapi_nexthop
*znh
);
132 /* Static functions */
135 * Handle failure in LSP install, clear flags for NHLFE.
137 static void clear_nhlfe_installed(zebra_lsp_t
*lsp
)
139 zebra_nhlfe_t
*nhlfe
;
140 struct nexthop
*nexthop
;
142 frr_each_safe(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
143 nexthop
= nhlfe
->nexthop
;
147 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
);
148 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
151 frr_each_safe(nhlfe_list
, &lsp
->backup_nhlfe_list
, nhlfe
) {
152 nexthop
= nhlfe
->nexthop
;
156 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
);
157 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
162 * Install label forwarding entry based on labeled-route entry.
164 static int lsp_install(struct zebra_vrf
*zvrf
, mpls_label_t label
,
165 struct route_node
*rn
, struct route_entry
*re
)
167 struct hash
*lsp_table
;
170 zebra_nhlfe_t
*nhlfe
;
171 struct nexthop
*nexthop
;
172 enum lsp_types_t lsp_type
;
177 lsp_table
= zvrf
->lsp_table
;
181 lsp_type
= lsp_type_from_re_type(re
->type
);
184 /* Locate or allocate LSP entry. */
185 tmp_ile
.in_label
= label
;
186 lsp
= hash_get(lsp_table
, &tmp_ile
, lsp_alloc
);
190 /* For each active nexthop, create NHLFE. Note that we deliberately skip
191 * recursive nexthops right now, because intermediate hops won't
193 * the label advertised by the recursive nexthop (plus we don't have the
194 * logic yet to push multiple labels).
196 for (nexthop
= re
->nhe
->nhg
.nexthop
;
197 nexthop
; nexthop
= nexthop
->next
) {
198 /* Skip inactive and recursive entries. */
199 if (!CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
))
201 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_RECURSIVE
))
204 nhlfe
= nhlfe_find(&lsp
->nhlfe_list
, lsp_type
,
205 nexthop
->type
, &nexthop
->gate
,
208 /* Clear deleted flag (in case it was set) */
209 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
);
210 if (nexthop_labels_match(nhlfe
->nexthop
, nexthop
))
215 if (IS_ZEBRA_DEBUG_MPLS
) {
216 nhlfe2str(nhlfe
, buf
, BUFSIZ
);
218 "LSP in-label %u type %d nexthop %s out-label changed",
219 lsp
->ile
.in_label
, lsp_type
, buf
);
222 /* Update out label, trigger processing. */
223 nhlfe_out_label_update(nhlfe
, nexthop
->nh_label
);
224 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_CHANGED
);
227 /* Add LSP entry to this nexthop */
228 nhlfe
= nhlfe_add(lsp
, lsp_type
, nexthop
->type
,
229 &nexthop
->gate
, nexthop
->ifindex
,
230 nexthop
->nh_label
->num_labels
,
231 nexthop
->nh_label
->label
,
236 if (IS_ZEBRA_DEBUG_MPLS
) {
237 nhlfe2str(nhlfe
, buf
, BUFSIZ
);
239 "Add LSP in-label %u type %d nexthop %s out-label %u",
240 lsp
->ile
.in_label
, lsp_type
, buf
,
241 nexthop
->nh_label
->label
[0]);
244 lsp
->addr_family
= NHLFE_FAMILY(nhlfe
);
246 /* Mark NHLFE as changed. */
247 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_CHANGED
);
252 /* Queue LSP for processing if necessary. If no NHLFE got added (special
253 * case), delete the LSP entry; this case results in somewhat ugly
256 if (added
|| changed
) {
257 if (lsp_processq_add(lsp
))
260 lsp_check_free(lsp_table
, &lsp
);
267 * Uninstall all non-static NHLFEs of a label forwarding entry. If all
268 * NHLFEs are removed, the entire entry is deleted.
270 static int lsp_uninstall(struct zebra_vrf
*zvrf
, mpls_label_t label
)
272 struct hash
*lsp_table
;
275 zebra_nhlfe_t
*nhlfe
;
279 lsp_table
= zvrf
->lsp_table
;
283 /* If entry is not present, exit. */
284 tmp_ile
.in_label
= label
;
285 lsp
= hash_lookup(lsp_table
, &tmp_ile
);
286 if (!lsp
|| (nhlfe_list_first(&lsp
->nhlfe_list
) == NULL
))
289 /* Mark NHLFEs for delete or directly delete, as appropriate. */
290 frr_each_safe(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
292 /* Skip static NHLFEs */
293 if (nhlfe
->type
== ZEBRA_LSP_STATIC
)
296 if (IS_ZEBRA_DEBUG_MPLS
) {
297 nhlfe2str(nhlfe
, buf
, BUFSIZ
);
299 "Del LSP in-label %u type %d nexthop %s flags 0x%x",
300 label
, nhlfe
->type
, buf
, nhlfe
->flags
);
303 if (CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_SELECTED
)) {
304 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_CHANGED
);
305 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
);
311 /* Queue LSP for processing, if needed, else delete. */
312 if (CHECK_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
)) {
313 if (lsp_processq_add(lsp
))
316 lsp_check_free(lsp_table
, &lsp
);
323 * This function is invoked upon change to label block configuration; it
324 * will walk all registered FECs with label-index and appropriately update
325 * their local labels and trigger client updates.
327 static void fec_evaluate(struct zebra_vrf
*zvrf
)
329 struct route_node
*rn
;
331 uint32_t old_label
, new_label
;
334 for (af
= AFI_IP
; af
< AFI_MAX
; af
++) {
335 if (zvrf
->fec_table
[af
] == NULL
)
338 for (rn
= route_top(zvrf
->fec_table
[af
]); rn
;
339 rn
= route_next(rn
)) {
340 if ((fec
= rn
->info
) == NULL
)
343 /* Skip configured FECs and those without a label index.
345 if (fec
->flags
& FEC_FLAG_CONFIGURED
346 || fec
->label_index
== MPLS_INVALID_LABEL_INDEX
)
349 /* Save old label, determine new label. */
350 old_label
= fec
->label
;
352 zvrf
->mpls_srgb
.start_label
+ fec
->label_index
;
353 if (new_label
>= zvrf
->mpls_srgb
.end_label
)
354 new_label
= MPLS_INVALID_LABEL
;
356 /* If label has changed, update FEC and clients. */
357 if (new_label
== old_label
)
360 if (IS_ZEBRA_DEBUG_MPLS
)
362 "Update fec %pRN new label %u upon label block",
365 fec
->label
= new_label
;
366 fec_update_clients(fec
);
368 /* Update label forwarding entries appropriately */
369 fec_change_update_lsp(zvrf
, fec
, old_label
);
375 * Derive (if possible) and update the local label for the FEC based on
376 * its label index. The index is "acceptable" if it falls within the
377 * globally configured label block (SRGB).
379 static uint32_t fec_derive_label_from_index(struct zebra_vrf
*zvrf
,
384 if (fec
->label_index
!= MPLS_INVALID_LABEL_INDEX
385 && zvrf
->mpls_srgb
.start_label
386 && ((label
= zvrf
->mpls_srgb
.start_label
+ fec
->label_index
)
387 < zvrf
->mpls_srgb
.end_label
))
390 fec
->label
= MPLS_INVALID_LABEL
;
396 * There is a change for this FEC. Install or uninstall label forwarding
397 * entries, as appropriate.
399 static int fec_change_update_lsp(struct zebra_vrf
*zvrf
, zebra_fec_t
*fec
,
400 mpls_label_t old_label
)
402 struct route_table
*table
;
403 struct route_node
*rn
;
404 struct route_entry
*re
;
407 /* Uninstall label forwarding entry, if previously installed. */
408 if (old_label
!= MPLS_INVALID_LABEL
409 && old_label
!= MPLS_LABEL_IMPLICIT_NULL
)
410 lsp_uninstall(zvrf
, old_label
);
412 /* Install label forwarding entry corr. to new label, if needed. */
413 if (fec
->label
== MPLS_INVALID_LABEL
414 || fec
->label
== MPLS_LABEL_IMPLICIT_NULL
)
417 afi
= family2afi(PREFIX_FAMILY(&fec
->rn
->p
));
418 table
= zebra_vrf_table(afi
, SAFI_UNICAST
, zvrf_id(zvrf
));
422 /* See if labeled route exists. */
423 rn
= route_node_lookup(table
, &fec
->rn
->p
);
427 RNODE_FOREACH_RE (rn
, re
) {
428 if (CHECK_FLAG(re
->flags
, ZEBRA_FLAG_SELECTED
))
432 if (!re
|| !zebra_rib_labeled_unicast(re
))
435 if (lsp_install(zvrf
, fec
->label
, rn
, re
))
442 * Inform about FEC to a registered client.
444 static int fec_send(zebra_fec_t
*fec
, struct zserv
*client
)
447 struct route_node
*rn
;
451 /* Get output stream. */
452 s
= stream_new(ZEBRA_MAX_PACKET_SIZ
);
454 zclient_create_header(s
, ZEBRA_FEC_UPDATE
, VRF_DEFAULT
);
456 stream_putw(s
, rn
->p
.family
);
457 stream_put_prefix(s
, &rn
->p
);
458 stream_putl(s
, fec
->label
);
459 stream_putw_at(s
, 0, stream_get_endp(s
));
460 return zserv_send_message(client
, s
);
464 * Update all registered clients about this FEC. Caller should've updated
465 * FEC and ensure no duplicate updates.
467 static void fec_update_clients(zebra_fec_t
*fec
)
469 struct listnode
*node
;
470 struct zserv
*client
;
472 for (ALL_LIST_ELEMENTS_RO(fec
->client_list
, node
, client
)) {
473 if (IS_ZEBRA_DEBUG_MPLS
)
474 zlog_debug("Update client %s",
475 zebra_route_string(client
->proto
));
476 fec_send(fec
, client
);
482 * Print a FEC-label binding entry.
484 static void fec_print(zebra_fec_t
*fec
, struct vty
*vty
)
486 struct route_node
*rn
;
487 struct listnode
*node
;
488 struct zserv
*client
;
492 vty_out(vty
, "%pRN\n", rn
);
493 vty_out(vty
, " Label: %s", label2str(fec
->label
, buf
, BUFSIZ
));
494 if (fec
->label_index
!= MPLS_INVALID_LABEL_INDEX
)
495 vty_out(vty
, ", Label Index: %u", fec
->label_index
);
497 if (!list_isempty(fec
->client_list
)) {
498 vty_out(vty
, " Client list:");
499 for (ALL_LIST_ELEMENTS_RO(fec
->client_list
, node
, client
))
500 vty_out(vty
, " %s(fd %d)",
501 zebra_route_string(client
->proto
),
508 * Locate FEC-label binding that matches with passed info.
510 static zebra_fec_t
*fec_find(struct route_table
*table
, struct prefix
*p
)
512 struct route_node
*rn
;
515 rn
= route_node_lookup(table
, p
);
519 route_unlock_node(rn
);
524 * Add a FEC. This may be upon a client registering for a binding
525 * or when a binding is configured.
527 static zebra_fec_t
*fec_add(struct route_table
*table
, struct prefix
*p
,
528 mpls_label_t label
, uint32_t flags
,
529 uint32_t label_index
)
531 struct route_node
*rn
;
536 /* Lookup (or add) route node.*/
537 rn
= route_node_get(table
, p
);
544 fec
= XCALLOC(MTYPE_FEC
, sizeof(zebra_fec_t
));
549 fec
->client_list
= list_new();
551 route_unlock_node(rn
); /* for the route_node_get */
553 fec
->label_index
= label_index
;
560 * Delete a FEC. This may be upon the last client deregistering for
561 * a FEC and no binding exists or when the binding is deleted and there
562 * are no registered clients.
564 static int fec_del(zebra_fec_t
*fec
)
566 list_delete(&fec
->client_list
);
567 fec
->rn
->info
= NULL
;
568 route_unlock_node(fec
->rn
);
569 XFREE(MTYPE_FEC
, fec
);
574 * Hash function for label.
576 static unsigned int label_hash(const void *p
)
578 const zebra_ile_t
*ile
= p
;
580 return (jhash_1word(ile
->in_label
, 0));
584 * Compare 2 LSP hash entries based on in-label.
586 static bool label_cmp(const void *p1
, const void *p2
)
588 const zebra_ile_t
*ile1
= p1
;
589 const zebra_ile_t
*ile2
= p2
;
591 return (ile1
->in_label
== ile2
->in_label
);
595 * Check if an IPv4 nexthop for a NHLFE is active. Update nexthop based on
597 * NOTE: Looking only for connected routes right now.
599 static int nhlfe_nexthop_active_ipv4(zebra_nhlfe_t
*nhlfe
,
600 struct nexthop
*nexthop
)
602 struct route_table
*table
;
603 struct prefix_ipv4 p
;
604 struct route_node
*rn
;
605 struct route_entry
*match
;
606 struct nexthop
*match_nh
;
608 table
= zebra_vrf_table(AFI_IP
, SAFI_UNICAST
, nexthop
->vrf_id
);
612 /* Lookup nexthop in IPv4 routing table. */
613 memset(&p
, 0, sizeof(struct prefix_ipv4
));
615 p
.prefixlen
= IPV4_MAX_PREFIXLEN
;
616 p
.prefix
= nexthop
->gate
.ipv4
;
618 rn
= route_node_match(table
, (struct prefix
*)&p
);
622 route_unlock_node(rn
);
624 /* Locate a valid connected route. */
625 RNODE_FOREACH_RE (rn
, match
) {
626 if (CHECK_FLAG(match
->status
, ROUTE_ENTRY_REMOVED
)
627 || !CHECK_FLAG(match
->flags
, ZEBRA_FLAG_SELECTED
))
630 for (match_nh
= match
->nhe
->nhg
.nexthop
; match_nh
;
631 match_nh
= match_nh
->next
) {
632 if (match
->type
== ZEBRA_ROUTE_CONNECT
633 || nexthop
->ifindex
== match_nh
->ifindex
) {
634 nexthop
->ifindex
= match_nh
->ifindex
;
645 * Check if an IPv6 nexthop for a NHLFE is active. Update nexthop based on
647 * NOTE: Looking only for connected routes right now.
649 static int nhlfe_nexthop_active_ipv6(zebra_nhlfe_t
*nhlfe
,
650 struct nexthop
*nexthop
)
652 struct route_table
*table
;
653 struct prefix_ipv6 p
;
654 struct route_node
*rn
;
655 struct route_entry
*match
;
657 table
= zebra_vrf_table(AFI_IP6
, SAFI_UNICAST
, nexthop
->vrf_id
);
661 /* Lookup nexthop in IPv6 routing table. */
662 memset(&p
, 0, sizeof(struct prefix_ipv6
));
664 p
.prefixlen
= IPV6_MAX_PREFIXLEN
;
665 p
.prefix
= nexthop
->gate
.ipv6
;
667 rn
= route_node_match(table
, (struct prefix
*)&p
);
671 route_unlock_node(rn
);
673 /* Locate a valid connected route. */
674 RNODE_FOREACH_RE (rn
, match
) {
675 if ((match
->type
== ZEBRA_ROUTE_CONNECT
)
676 && !CHECK_FLAG(match
->status
, ROUTE_ENTRY_REMOVED
)
677 && CHECK_FLAG(match
->flags
, ZEBRA_FLAG_SELECTED
))
681 if (!match
|| !match
->nhe
->nhg
.nexthop
)
684 nexthop
->ifindex
= match
->nhe
->nhg
.nexthop
->ifindex
;
690 * Check the nexthop reachability for a NHLFE and return if valid (reachable)
692 * NOTE: Each NHLFE points to only 1 nexthop.
694 static int nhlfe_nexthop_active(zebra_nhlfe_t
*nhlfe
)
696 struct nexthop
*nexthop
;
697 struct interface
*ifp
;
698 struct zebra_ns
*zns
;
700 nexthop
= nhlfe
->nexthop
;
701 if (!nexthop
) // unexpected
704 /* Check on nexthop based on type. */
705 switch (nexthop
->type
) {
706 case NEXTHOP_TYPE_IFINDEX
:
708 * Lookup if this type is special. The
709 * NEXTHOP_TYPE_IFINDEX is a pop and
710 * forward into a different table for
711 * processing. As such this ifindex
712 * passed to us may be a VRF device
713 * which will not be in the default
714 * VRF. So let's look in all of them
716 zns
= zebra_ns_lookup(NS_DEFAULT
);
717 ifp
= if_lookup_by_index_per_ns(zns
, nexthop
->ifindex
);
718 if (ifp
&& if_is_operative(ifp
))
719 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
721 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
723 case NEXTHOP_TYPE_IPV4
:
724 case NEXTHOP_TYPE_IPV4_IFINDEX
:
725 if (nhlfe_nexthop_active_ipv4(nhlfe
, nexthop
))
726 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
728 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
731 case NEXTHOP_TYPE_IPV6
:
732 if (nhlfe_nexthop_active_ipv6(nhlfe
, nexthop
))
733 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
735 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
738 case NEXTHOP_TYPE_IPV6_IFINDEX
:
739 if (IN6_IS_ADDR_LINKLOCAL(&nexthop
->gate
.ipv6
)) {
740 ifp
= if_lookup_by_index(nexthop
->ifindex
,
742 if (ifp
&& if_is_operative(ifp
))
743 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
745 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
747 if (nhlfe_nexthop_active_ipv6(nhlfe
, nexthop
))
748 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
750 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
758 return CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
762 * Walk through NHLFEs for a LSP forwarding entry, verify nexthop
763 * reachability and select the best. Multipath entries are also
764 * marked. This is invoked when an LSP scheduled for processing (due
765 * to some change) is examined.
767 static void lsp_select_best_nhlfe(zebra_lsp_t
*lsp
)
769 zebra_nhlfe_t
*nhlfe
;
771 struct nexthop
*nexthop
;
779 UNSET_FLAG(lsp
->flags
, LSP_FLAG_CHANGED
);
782 * First compute the best path, after checking nexthop status. We are
783 * only concerned with non-deleted NHLFEs.
785 frr_each_safe(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
786 /* Clear selection flags. */
787 UNSET_FLAG(nhlfe
->flags
,
788 (NHLFE_FLAG_SELECTED
| NHLFE_FLAG_MULTIPATH
));
790 if (!CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
)
791 && nhlfe_nexthop_active(nhlfe
)) {
792 if (!best
|| (nhlfe
->distance
< best
->distance
))
797 lsp
->best_nhlfe
= best
;
798 if (!lsp
->best_nhlfe
)
802 * Check the active status of backup nhlfes also
804 frr_each_safe(nhlfe_list
, &lsp
->backup_nhlfe_list
, nhlfe
) {
805 if (!CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
))
806 (void)nhlfe_nexthop_active(nhlfe
);
809 /* Mark best NHLFE as selected. */
810 SET_FLAG(lsp
->best_nhlfe
->flags
, NHLFE_FLAG_SELECTED
);
813 * If best path exists, see if there is ECMP. While doing this, note if
815 * new (uninstalled) NHLFE has been selected, an installed entry that is
816 * still selected has a change or an installed entry is to be removed.
818 frr_each(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
819 int nh_chg
, nh_sel
, nh_inst
;
821 nexthop
= nhlfe
->nexthop
;
822 if (!nexthop
) // unexpected
825 if (!CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
)
826 && CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
)
827 && (nhlfe
->distance
== lsp
->best_nhlfe
->distance
)) {
828 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_SELECTED
);
829 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_MULTIPATH
);
833 if (CHECK_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
) && !changed
) {
834 nh_chg
= CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_CHANGED
);
835 nh_sel
= CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_SELECTED
);
837 CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
);
839 if ((nh_sel
&& !nh_inst
)
840 || (nh_sel
&& nh_inst
&& nh_chg
)
841 || (nh_inst
&& !nh_sel
))
845 /* We have finished examining, clear changed flag. */
846 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_CHANGED
);
850 SET_FLAG(lsp
->flags
, LSP_FLAG_CHANGED
);
854 * Delete LSP forwarding entry from kernel, if installed. Called upon
857 static void lsp_uninstall_from_kernel(struct hash_bucket
*bucket
, void *ctxt
)
861 lsp
= (zebra_lsp_t
*)bucket
->data
;
862 if (CHECK_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
))
863 (void)dplane_lsp_delete(lsp
);
867 * Schedule LSP forwarding entry for processing. Called upon changes
868 * that may impact LSPs such as nexthop / connected route changes.
870 static void lsp_schedule(struct hash_bucket
*bucket
, void *ctxt
)
874 lsp
= (zebra_lsp_t
*)bucket
->data
;
875 (void)lsp_processq_add(lsp
);
879 * Process a LSP entry that is in the queue. Recalculate best NHLFE and
880 * any multipaths and update or delete from the kernel, as needed.
882 static wq_item_status
lsp_process(struct work_queue
*wq
, void *data
)
885 zebra_nhlfe_t
*oldbest
, *newbest
;
886 char buf
[BUFSIZ
], buf2
[BUFSIZ
];
887 struct zebra_vrf
*zvrf
= vrf_info_lookup(VRF_DEFAULT
);
888 enum zebra_dplane_result res
;
890 lsp
= (zebra_lsp_t
*)data
;
891 if (!lsp
) // unexpected
894 oldbest
= lsp
->best_nhlfe
;
896 /* Select best NHLFE(s) */
897 lsp_select_best_nhlfe(lsp
);
899 newbest
= lsp
->best_nhlfe
;
901 if (IS_ZEBRA_DEBUG_MPLS
) {
903 nhlfe2str(oldbest
, buf
, sizeof(buf
));
905 nhlfe2str(newbest
, buf2
, sizeof(buf2
));
907 "Process LSP in-label %u oldbest %s newbest %s flags 0x%x ecmp# %d",
908 lsp
->ile
.in_label
, oldbest
? buf
: "NULL",
909 newbest
? buf2
: "NULL", lsp
->flags
, lsp
->num_ecmp
);
912 if (!CHECK_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
)) {
913 /* Not already installed */
916 UNSET_FLAG(lsp
->flags
, LSP_FLAG_CHANGED
);
918 switch (dplane_lsp_add(lsp
)) {
919 case ZEBRA_DPLANE_REQUEST_QUEUED
:
920 /* Set 'installed' flag so we will know
921 * that an install is in-flight.
923 SET_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
);
925 zvrf
->lsp_installs_queued
++;
927 case ZEBRA_DPLANE_REQUEST_FAILURE
:
928 flog_warn(EC_ZEBRA_LSP_INSTALL_FAILURE
,
929 "LSP Install Failure: %u",
932 case ZEBRA_DPLANE_REQUEST_SUCCESS
:
933 zvrf
->lsp_installs
++;
938 /* Installed, may need an update and/or delete. */
940 res
= dplane_lsp_delete(lsp
);
942 /* We do some of the lsp cleanup immediately for
945 UNSET_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
);
946 clear_nhlfe_installed(lsp
);
949 case ZEBRA_DPLANE_REQUEST_QUEUED
:
950 zvrf
->lsp_removals_queued
++;
952 case ZEBRA_DPLANE_REQUEST_FAILURE
:
953 flog_warn(EC_ZEBRA_LSP_DELETE_FAILURE
,
954 "LSP Deletion Failure: %u",
957 case ZEBRA_DPLANE_REQUEST_SUCCESS
:
958 zvrf
->lsp_removals
++;
961 } else if (CHECK_FLAG(lsp
->flags
, LSP_FLAG_CHANGED
)) {
962 zebra_nhlfe_t
*nhlfe
;
963 struct nexthop
*nexthop
;
965 UNSET_FLAG(lsp
->flags
, LSP_FLAG_CHANGED
);
967 /* We leave the INSTALLED flag set here
968 * so we know an update is in-flight.
972 * Any NHLFE that was installed but is not
973 * selected now needs to have its flags updated.
975 frr_each_safe(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
976 nexthop
= nhlfe
->nexthop
;
980 if (CHECK_FLAG(nhlfe
->flags
,
981 NHLFE_FLAG_INSTALLED
)
982 && !CHECK_FLAG(nhlfe
->flags
,
983 NHLFE_FLAG_SELECTED
)) {
984 UNSET_FLAG(nhlfe
->flags
,
985 NHLFE_FLAG_INSTALLED
);
986 UNSET_FLAG(nexthop
->flags
,
991 switch (dplane_lsp_update(lsp
)) {
992 case ZEBRA_DPLANE_REQUEST_QUEUED
:
993 zvrf
->lsp_installs_queued
++;
995 case ZEBRA_DPLANE_REQUEST_FAILURE
:
996 flog_warn(EC_ZEBRA_LSP_INSTALL_FAILURE
,
997 "LSP Update Failure: %u",
1000 case ZEBRA_DPLANE_REQUEST_SUCCESS
:
1001 zvrf
->lsp_installs
++;
1012 * Callback upon processing completion of a LSP forwarding entry.
1014 static void lsp_processq_del(struct work_queue
*wq
, void *data
)
1016 struct zebra_vrf
*zvrf
;
1018 struct hash
*lsp_table
;
1019 zebra_nhlfe_t
*nhlfe
;
1021 zvrf
= vrf_info_lookup(VRF_DEFAULT
);
1024 lsp_table
= zvrf
->lsp_table
;
1025 if (!lsp_table
) // unexpected
1028 lsp
= (zebra_lsp_t
*)data
;
1029 if (!lsp
) // unexpected
1032 /* Clear flag, remove any NHLFEs marked for deletion. If no NHLFEs
1034 * delete LSP entry also.
1036 UNSET_FLAG(lsp
->flags
, LSP_FLAG_SCHEDULED
);
1038 frr_each_safe(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
1039 if (CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
))
1043 frr_each_safe(nhlfe_list
, &lsp
->backup_nhlfe_list
, nhlfe
) {
1044 if (CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
))
1048 lsp_check_free(lsp_table
, &lsp
);
1052 * Callback upon finishing the processing of all scheduled
1053 * LSP forwarding entries.
1055 static void lsp_processq_complete(struct work_queue
*wq
)
1057 /* Nothing to do for now. */
1061 * Add LSP forwarding entry to queue for subsequent processing.
1063 static int lsp_processq_add(zebra_lsp_t
*lsp
)
1065 /* If already scheduled, exit. */
1066 if (CHECK_FLAG(lsp
->flags
, LSP_FLAG_SCHEDULED
))
1069 if (zrouter
.lsp_process_q
== NULL
) {
1070 flog_err(EC_ZEBRA_WQ_NONEXISTENT
,
1071 "%s: work_queue does not exist!", __func__
);
1075 work_queue_add(zrouter
.lsp_process_q
, lsp
);
1076 SET_FLAG(lsp
->flags
, LSP_FLAG_SCHEDULED
);
1081 * Callback to allocate LSP forwarding table entry.
1083 static void *lsp_alloc(void *p
)
1085 const zebra_ile_t
*ile
= p
;
1088 lsp
= XCALLOC(MTYPE_LSP
, sizeof(zebra_lsp_t
));
1090 nhlfe_list_init(&lsp
->nhlfe_list
);
1091 nhlfe_list_init(&lsp
->backup_nhlfe_list
);
1093 if (IS_ZEBRA_DEBUG_MPLS
)
1094 zlog_debug("Alloc LSP in-label %u", lsp
->ile
.in_label
);
1096 return ((void *)lsp
);
1100 * Check whether lsp can be freed - no nhlfes, e.g., and call free api
1102 static void lsp_check_free(struct hash
*lsp_table
, zebra_lsp_t
**plsp
)
1106 if (plsp
== NULL
|| *plsp
== NULL
)
1111 if ((nhlfe_list_first(&lsp
->nhlfe_list
) == NULL
) &&
1112 (nhlfe_list_first(&lsp
->backup_nhlfe_list
) == NULL
) &&
1113 !CHECK_FLAG(lsp
->flags
, LSP_FLAG_SCHEDULED
))
1114 lsp_free(lsp_table
, plsp
);
1118 * Dtor for an LSP: remove from ile hash, release any internal allocations,
1121 static void lsp_free(struct hash
*lsp_table
, zebra_lsp_t
**plsp
)
1124 zebra_nhlfe_t
*nhlfe
;
1126 if (plsp
== NULL
|| *plsp
== NULL
)
1131 if (IS_ZEBRA_DEBUG_MPLS
)
1132 zlog_debug("Free LSP in-label %u flags 0x%x",
1133 lsp
->ile
.in_label
, lsp
->flags
);
1135 /* Free nhlfes, if any. */
1136 frr_each_safe(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
)
1139 /* Free backup nhlfes, if any. */
1140 frr_each_safe(nhlfe_list
, &lsp
->backup_nhlfe_list
, nhlfe
)
1143 hash_release(lsp_table
, &lsp
->ile
);
1144 XFREE(MTYPE_LSP
, lsp
);
1150 * Create printable string for NHLFE entry.
1152 static char *nhlfe2str(const zebra_nhlfe_t
*nhlfe
, char *buf
, int size
)
1154 const struct nexthop
*nexthop
;
1157 nexthop
= nhlfe
->nexthop
;
1158 switch (nexthop
->type
) {
1159 case NEXTHOP_TYPE_IPV4
:
1160 case NEXTHOP_TYPE_IPV4_IFINDEX
:
1161 inet_ntop(AF_INET
, &nexthop
->gate
.ipv4
, buf
, size
);
1163 case NEXTHOP_TYPE_IPV6
:
1164 case NEXTHOP_TYPE_IPV6_IFINDEX
:
1165 inet_ntop(AF_INET6
, &nexthop
->gate
.ipv6
, buf
, size
);
1167 case NEXTHOP_TYPE_IFINDEX
:
1168 snprintf(buf
, size
, "Ifindex: %u", nexthop
->ifindex
);
1177 * Check if NHLFE matches with search info passed.
1179 static int nhlfe_nhop_match(zebra_nhlfe_t
*nhlfe
, enum nexthop_types_t gtype
,
1180 const union g_addr
*gate
, ifindex_t ifindex
)
1182 struct nexthop
*nhop
;
1185 nhop
= nhlfe
->nexthop
;
1189 if (nhop
->type
!= gtype
)
1192 switch (nhop
->type
) {
1193 case NEXTHOP_TYPE_IPV4
:
1194 case NEXTHOP_TYPE_IPV4_IFINDEX
:
1195 cmp
= memcmp(&(nhop
->gate
.ipv4
), &(gate
->ipv4
),
1196 sizeof(struct in_addr
));
1197 if (!cmp
&& nhop
->type
== NEXTHOP_TYPE_IPV4_IFINDEX
)
1198 cmp
= !(nhop
->ifindex
== ifindex
);
1200 case NEXTHOP_TYPE_IPV6
:
1201 case NEXTHOP_TYPE_IPV6_IFINDEX
:
1202 cmp
= memcmp(&(nhop
->gate
.ipv6
), &(gate
->ipv6
),
1203 sizeof(struct in6_addr
));
1204 if (!cmp
&& nhop
->type
== NEXTHOP_TYPE_IPV6_IFINDEX
)
1205 cmp
= !(nhop
->ifindex
== ifindex
);
1207 case NEXTHOP_TYPE_IFINDEX
:
1208 cmp
= !(nhop
->ifindex
== ifindex
);
1219 * Locate NHLFE that matches with passed info.
1221 static zebra_nhlfe_t
*nhlfe_find(struct nhlfe_list_head
*list
,
1222 enum lsp_types_t lsp_type
,
1223 enum nexthop_types_t gtype
,
1224 const union g_addr
*gate
, ifindex_t ifindex
)
1226 zebra_nhlfe_t
*nhlfe
;
1228 frr_each_safe(nhlfe_list
, list
, nhlfe
) {
1229 if (nhlfe
->type
!= lsp_type
)
1231 if (!nhlfe_nhop_match(nhlfe
, gtype
, gate
, ifindex
))
1239 * Allocate and init new NHLFE.
1241 static zebra_nhlfe_t
*nhlfe_alloc(zebra_lsp_t
*lsp
, enum lsp_types_t lsp_type
,
1242 enum nexthop_types_t gtype
,
1243 const union g_addr
*gate
, ifindex_t ifindex
,
1245 const mpls_label_t
*labels
)
1247 zebra_nhlfe_t
*nhlfe
;
1248 struct nexthop
*nexthop
;
1252 nhlfe
= XCALLOC(MTYPE_NHLFE
, sizeof(zebra_nhlfe_t
));
1255 nhlfe
->type
= lsp_type
;
1256 nhlfe
->distance
= lsp_distance(lsp_type
);
1258 nexthop
= nexthop_new();
1260 nexthop_add_labels(nexthop
, lsp_type
, num_labels
, labels
);
1262 nexthop
->vrf_id
= VRF_DEFAULT
;
1263 nexthop
->type
= gtype
;
1264 switch (nexthop
->type
) {
1265 case NEXTHOP_TYPE_IPV4
:
1266 case NEXTHOP_TYPE_IPV4_IFINDEX
:
1267 nexthop
->gate
.ipv4
= gate
->ipv4
;
1269 nexthop
->ifindex
= ifindex
;
1271 case NEXTHOP_TYPE_IPV6
:
1272 case NEXTHOP_TYPE_IPV6_IFINDEX
:
1273 nexthop
->gate
.ipv6
= gate
->ipv6
;
1275 nexthop
->ifindex
= ifindex
;
1277 case NEXTHOP_TYPE_IFINDEX
:
1278 nexthop
->ifindex
= ifindex
;
1281 nexthop_free(nexthop
);
1282 XFREE(MTYPE_NHLFE
, nhlfe
);
1285 nhlfe
->nexthop
= nexthop
;
1291 * Add primary or backup NHLFE. Base entry must have been created and
1292 * duplicate check done.
1294 static zebra_nhlfe_t
*nhlfe_add(zebra_lsp_t
*lsp
, enum lsp_types_t lsp_type
,
1295 enum nexthop_types_t gtype
,
1296 const union g_addr
*gate
, ifindex_t ifindex
,
1297 uint8_t num_labels
, const mpls_label_t
*labels
,
1300 zebra_nhlfe_t
*nhlfe
;
1305 /* Allocate new object */
1306 nhlfe
= nhlfe_alloc(lsp
, lsp_type
, gtype
, gate
, ifindex
, num_labels
,
1309 /* Enqueue to LSP: primaries at head of list, backups at tail */
1311 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_IS_BACKUP
);
1312 nhlfe_list_add_tail(&lsp
->backup_nhlfe_list
, nhlfe
);
1314 nhlfe_list_add_head(&lsp
->nhlfe_list
, nhlfe
);
1320 * Common delete for NHLFEs.
1322 static void nhlfe_free(zebra_nhlfe_t
*nhlfe
)
1329 nexthop_free(nhlfe
->nexthop
);
1331 nhlfe
->nexthop
= NULL
;
1333 XFREE(MTYPE_NHLFE
, nhlfe
);
1338 * Disconnect NHLFE from LSP, and free. Entry must be present on LSP's list.
1340 static int nhlfe_del(zebra_nhlfe_t
*nhlfe
)
1351 if (nhlfe
== lsp
->best_nhlfe
)
1352 lsp
->best_nhlfe
= NULL
;
1354 /* Unlink from LSP */
1355 if (CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_IS_BACKUP
))
1356 nhlfe_list_del(&lsp
->backup_nhlfe_list
, nhlfe
);
1358 nhlfe_list_del(&lsp
->nhlfe_list
, nhlfe
);
1368 * Update label for NHLFE entry.
1370 static void nhlfe_out_label_update(zebra_nhlfe_t
*nhlfe
,
1371 struct mpls_label_stack
*nh_label
)
1373 nhlfe
->nexthop
->nh_label
->label
[0] = nh_label
->label
[0];
1376 static int mpls_lsp_uninstall_all(struct hash
*lsp_table
, zebra_lsp_t
*lsp
,
1377 enum lsp_types_t type
)
1379 zebra_nhlfe_t
*nhlfe
;
1380 int schedule_lsp
= 0;
1383 if (CHECK_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
))
1386 /* Mark NHLFEs for delete or directly delete, as appropriate. */
1387 frr_each_safe(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
1388 /* Skip non-static NHLFEs */
1389 if (nhlfe
->type
!= type
)
1392 if (IS_ZEBRA_DEBUG_MPLS
) {
1393 nhlfe2str(nhlfe
, buf
, sizeof(buf
));
1395 "Del LSP in-label %u type %d nexthop %s flags 0x%x",
1396 lsp
->ile
.in_label
, type
, buf
, nhlfe
->flags
);
1399 if (CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
)) {
1400 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_CHANGED
);
1401 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
);
1408 frr_each_safe(nhlfe_list
, &lsp
->backup_nhlfe_list
, nhlfe
) {
1409 /* Skip non-static NHLFEs */
1410 if (nhlfe
->type
!= type
)
1413 if (IS_ZEBRA_DEBUG_MPLS
) {
1414 nhlfe2str(nhlfe
, buf
, sizeof(buf
));
1416 "Del backup LSP in-label %u type %d nexthop %s flags 0x%x",
1417 lsp
->ile
.in_label
, type
, buf
, nhlfe
->flags
);
1420 if (CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
)) {
1421 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_CHANGED
);
1422 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
);
1429 /* Queue LSP for processing, if needed, else delete. */
1431 if (IS_ZEBRA_DEBUG_MPLS
) {
1432 zlog_debug("Schedule LSP in-label %u flags 0x%x",
1433 lsp
->ile
.in_label
, lsp
->flags
);
1435 if (lsp_processq_add(lsp
))
1438 lsp_check_free(lsp_table
, &lsp
);
1445 * Uninstall all static NHLFEs for a particular LSP forwarding entry.
1446 * If no other NHLFEs exist, the entry would be deleted.
1448 static int mpls_static_lsp_uninstall_all(struct zebra_vrf
*zvrf
,
1449 mpls_label_t in_label
)
1451 struct hash
*lsp_table
;
1452 zebra_ile_t tmp_ile
;
1456 lsp_table
= zvrf
->lsp_table
;
1460 /* If entry is not present, exit. */
1461 tmp_ile
.in_label
= in_label
;
1462 lsp
= hash_lookup(lsp_table
, &tmp_ile
);
1463 if (!lsp
|| (nhlfe_list_first(&lsp
->nhlfe_list
) == NULL
))
1466 return mpls_lsp_uninstall_all(lsp_table
, lsp
, ZEBRA_LSP_STATIC
);
1469 static json_object
*nhlfe_json(zebra_nhlfe_t
*nhlfe
)
1472 json_object
*json_nhlfe
= NULL
;
1473 json_object
*json_backups
= NULL
;
1474 json_object
*json_label_stack
;
1475 struct nexthop
*nexthop
= nhlfe
->nexthop
;
1478 json_nhlfe
= json_object_new_object();
1479 json_object_string_add(json_nhlfe
, "type", nhlfe_type2str(nhlfe
->type
));
1480 json_object_int_add(json_nhlfe
, "outLabel",
1481 nexthop
->nh_label
->label
[0]);
1483 json_label_stack
= json_object_new_array();
1484 json_object_object_add(json_nhlfe
, "outLabelStack", json_label_stack
);
1485 for (i
= 0; i
< nexthop
->nh_label
->num_labels
; i
++)
1486 json_object_array_add(
1488 json_object_new_int(nexthop
->nh_label
->label
[i
]));
1490 json_object_int_add(json_nhlfe
, "distance", nhlfe
->distance
);
1492 if (CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
))
1493 json_object_boolean_true_add(json_nhlfe
, "installed");
1495 switch (nexthop
->type
) {
1496 case NEXTHOP_TYPE_IPV4
:
1497 case NEXTHOP_TYPE_IPV4_IFINDEX
:
1498 json_object_string_add(json_nhlfe
, "nexthop",
1499 inet_ntop(AF_INET
, &nexthop
->gate
.ipv4
,
1502 case NEXTHOP_TYPE_IPV6
:
1503 case NEXTHOP_TYPE_IPV6_IFINDEX
:
1504 json_object_string_add(
1505 json_nhlfe
, "nexthop",
1506 inet_ntop(AF_INET6
, &nexthop
->gate
.ipv6
, buf
, BUFSIZ
));
1508 if (nexthop
->ifindex
)
1509 json_object_string_add(json_nhlfe
, "interface",
1510 ifindex2ifname(nexthop
->ifindex
,
1517 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_HAS_BACKUP
)) {
1518 json_backups
= json_object_new_array();
1519 for (i
= 0; i
< nexthop
->backup_num
; i
++) {
1520 json_object_array_add(
1522 json_object_new_int(nexthop
->backup_idx
[i
]));
1525 json_object_object_add(json_nhlfe
, "backupIndex",
1533 * Print the NHLFE for a LSP forwarding entry.
1535 static void nhlfe_print(zebra_nhlfe_t
*nhlfe
, struct vty
*vty
,
1538 struct nexthop
*nexthop
;
1539 char buf
[MPLS_LABEL_STRLEN
];
1541 nexthop
= nhlfe
->nexthop
;
1542 if (!nexthop
|| !nexthop
->nh_label
) // unexpected
1545 vty_out(vty
, " type: %s remote label: %s distance: %d\n",
1546 nhlfe_type2str(nhlfe
->type
),
1547 mpls_label2str(nexthop
->nh_label
->num_labels
,
1548 nexthop
->nh_label
->label
,
1549 buf
, sizeof(buf
), 0),
1553 vty_out(vty
, "%s", indent
);
1555 switch (nexthop
->type
) {
1556 case NEXTHOP_TYPE_IPV4
:
1557 case NEXTHOP_TYPE_IPV4_IFINDEX
:
1558 vty_out(vty
, " via %pI4", &nexthop
->gate
.ipv4
);
1559 if (nexthop
->ifindex
)
1560 vty_out(vty
, " dev %s",
1561 ifindex2ifname(nexthop
->ifindex
,
1564 case NEXTHOP_TYPE_IPV6
:
1565 case NEXTHOP_TYPE_IPV6_IFINDEX
:
1566 vty_out(vty
, " via %s",
1567 inet_ntop(AF_INET6
, &nexthop
->gate
.ipv6
, buf
,
1569 if (nexthop
->ifindex
)
1570 vty_out(vty
, " dev %s",
1571 ifindex2ifname(nexthop
->ifindex
,
1578 CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_IS_BACKUP
) ? " (backup)"
1581 CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
) ? " (installed)"
1587 * Print an LSP forwarding entry.
1589 static void lsp_print(struct vty
*vty
, zebra_lsp_t
*lsp
)
1591 zebra_nhlfe_t
*nhlfe
, *backup
;
1594 vty_out(vty
, "Local label: %u%s\n", lsp
->ile
.in_label
,
1595 CHECK_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
) ? " (installed)"
1598 frr_each(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
1599 nhlfe_print(nhlfe
, vty
, NULL
);
1601 if (nhlfe
->nexthop
== NULL
||
1602 !CHECK_FLAG(nhlfe
->nexthop
->flags
,
1603 NEXTHOP_FLAG_HAS_BACKUP
))
1606 /* Backup nhlfes: find backups in backup list */
1608 for (j
= 0; j
< nhlfe
->nexthop
->backup_num
; j
++) {
1611 frr_each(nhlfe_list
, &lsp
->backup_nhlfe_list
, backup
) {
1612 if (i
== nhlfe
->nexthop
->backup_idx
[j
])
1618 vty_out(vty
, " [backup %d]", i
);
1619 nhlfe_print(backup
, vty
, " ");
1626 * JSON objects for an LSP forwarding entry.
1628 static json_object
*lsp_json(zebra_lsp_t
*lsp
)
1630 zebra_nhlfe_t
*nhlfe
= NULL
;
1631 json_object
*json
= json_object_new_object();
1632 json_object
*json_nhlfe_list
= json_object_new_array();
1634 json_object_int_add(json
, "inLabel", lsp
->ile
.in_label
);
1636 if (CHECK_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
))
1637 json_object_boolean_true_add(json
, "installed");
1639 frr_each(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
)
1640 json_object_array_add(json_nhlfe_list
, nhlfe_json(nhlfe
));
1642 json_object_object_add(json
, "nexthops", json_nhlfe_list
);
1643 json_nhlfe_list
= NULL
;
1646 frr_each(nhlfe_list
, &lsp
->backup_nhlfe_list
, nhlfe
) {
1647 if (json_nhlfe_list
== NULL
)
1648 json_nhlfe_list
= json_object_new_array();
1650 json_object_array_add(json_nhlfe_list
, nhlfe_json(nhlfe
));
1653 if (json_nhlfe_list
)
1654 json_object_object_add(json
, "backupNexthops", json_nhlfe_list
);
1660 /* Return a sorted linked list of the hash contents */
1661 static struct list
*hash_get_sorted_list(struct hash
*hash
, void *cmp
)
1664 struct hash_bucket
*hb
;
1665 struct list
*sorted_list
= list_new();
1667 sorted_list
->cmp
= (int (*)(void *, void *))cmp
;
1669 for (i
= 0; i
< hash
->size
; i
++)
1670 for (hb
= hash
->index
[i
]; hb
; hb
= hb
->next
)
1671 listnode_add_sort(sorted_list
, hb
->data
);
1677 * Compare two LSPs based on their label values.
1679 static int lsp_cmp(const zebra_lsp_t
*lsp1
, const zebra_lsp_t
*lsp2
)
1681 if (lsp1
->ile
.in_label
< lsp2
->ile
.in_label
)
1684 if (lsp1
->ile
.in_label
> lsp2
->ile
.in_label
)
1691 * Initialize work queue for processing changed LSPs.
1693 static int mpls_processq_init(void)
1695 zrouter
.lsp_process_q
= work_queue_new(zrouter
.master
, "LSP processing");
1696 if (!zrouter
.lsp_process_q
) {
1697 flog_err(EC_ZEBRA_WQ_NONEXISTENT
,
1698 "%s: could not initialise work queue!", __func__
);
1702 zrouter
.lsp_process_q
->spec
.workfunc
= &lsp_process
;
1703 zrouter
.lsp_process_q
->spec
.del_item_data
= &lsp_processq_del
;
1704 zrouter
.lsp_process_q
->spec
.errorfunc
= NULL
;
1705 zrouter
.lsp_process_q
->spec
.completion_func
= &lsp_processq_complete
;
1706 zrouter
.lsp_process_q
->spec
.max_retries
= 0;
1707 zrouter
.lsp_process_q
->spec
.hold
= 10;
1714 * Process LSP update results from zebra dataplane.
1716 void zebra_mpls_lsp_dplane_result(struct zebra_dplane_ctx
*ctx
)
1718 struct zebra_vrf
*zvrf
;
1720 zebra_ile_t tmp_ile
;
1721 struct hash
*lsp_table
;
1723 zebra_nhlfe_t
*nhlfe
;
1724 struct nexthop
*nexthop
;
1725 enum dplane_op_e op
;
1726 enum zebra_dplane_result status
;
1727 enum zebra_sr_policy_update_label_mode update_mode
;
1729 op
= dplane_ctx_get_op(ctx
);
1730 status
= dplane_ctx_get_status(ctx
);
1732 if (IS_ZEBRA_DEBUG_DPLANE_DETAIL
)
1733 zlog_debug("LSP dplane ctx %p, op %s, in-label %u, result %s",
1734 ctx
, dplane_op2str(op
),
1735 dplane_ctx_get_in_label(ctx
),
1736 dplane_res2str(status
));
1738 label
= dplane_ctx_get_in_label(ctx
);
1741 case DPLANE_OP_LSP_INSTALL
:
1742 case DPLANE_OP_LSP_UPDATE
:
1743 /* Look for zebra LSP object */
1744 zvrf
= vrf_info_lookup(VRF_DEFAULT
);
1748 lsp_table
= zvrf
->lsp_table
;
1750 tmp_ile
.in_label
= label
;
1751 lsp
= hash_lookup(lsp_table
, &tmp_ile
);
1753 if (IS_ZEBRA_DEBUG_DPLANE
)
1754 zlog_debug("LSP ctx %p: in-label %u not found",
1755 ctx
, dplane_ctx_get_in_label(ctx
));
1759 /* TODO -- Confirm that this result is still 'current' */
1761 if (status
!= ZEBRA_DPLANE_REQUEST_SUCCESS
) {
1762 UNSET_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
);
1763 clear_nhlfe_installed(lsp
);
1764 flog_warn(EC_ZEBRA_LSP_INSTALL_FAILURE
,
1765 "LSP Install Failure: in-label %u",
1770 /* Update zebra object */
1771 SET_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
);
1772 frr_each(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
1773 nexthop
= nhlfe
->nexthop
;
1777 if (CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_SELECTED
) &&
1778 CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
)) {
1779 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
);
1780 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
1784 update_mode
= (op
== DPLANE_OP_LSP_INSTALL
)
1785 ? ZEBRA_SR_POLICY_LABEL_CREATED
1786 : ZEBRA_SR_POLICY_LABEL_UPDATED
;
1787 zebra_sr_policy_label_update(label
, update_mode
);
1790 case DPLANE_OP_LSP_DELETE
:
1791 if (status
!= ZEBRA_DPLANE_REQUEST_SUCCESS
) {
1792 flog_warn(EC_ZEBRA_LSP_DELETE_FAILURE
,
1793 "LSP Deletion Failure: in-label %u",
1794 dplane_ctx_get_in_label(ctx
));
1797 zebra_sr_policy_label_update(label
,
1798 ZEBRA_SR_POLICY_LABEL_REMOVED
);
1806 dplane_ctx_fini(&ctx
);
1810 * Process LSP installation info from two sets of nhlfes: a set from
1811 * a dplane notification, and a set from the zebra LSP object. Update
1812 * counters of installed nexthops, and return whether the LSP has changed.
1814 static bool compare_notif_nhlfes(const struct nhlfe_list_head
*ctx_head
,
1815 struct nhlfe_list_head
*nhlfe_head
,
1816 int *start_counter
, int *end_counter
)
1818 zebra_nhlfe_t
*nhlfe
;
1819 const zebra_nhlfe_t
*ctx_nhlfe
;
1820 struct nexthop
*nexthop
;
1821 const struct nexthop
*ctx_nexthop
;
1822 int start_count
= 0, end_count
= 0;
1823 bool changed_p
= false;
1824 bool is_debug
= (IS_ZEBRA_DEBUG_DPLANE
| IS_ZEBRA_DEBUG_MPLS
);
1826 frr_each_safe(nhlfe_list
, nhlfe_head
, nhlfe
) {
1827 char buf
[NEXTHOP_STRLEN
];
1829 nexthop
= nhlfe
->nexthop
;
1833 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
))
1838 frr_each(nhlfe_list_const
, ctx_head
, ctx_nhlfe
) {
1839 ctx_nexthop
= ctx_nhlfe
->nexthop
;
1843 if ((ctx_nexthop
->type
== nexthop
->type
) &&
1844 nexthop_same(ctx_nexthop
, nexthop
)) {
1851 nexthop2str(nexthop
, buf
, sizeof(buf
));
1853 if (ctx_nhlfe
&& ctx_nexthop
) {
1855 const char *tstr
= "";
1857 if (!CHECK_FLAG(ctx_nhlfe
->flags
,
1858 NHLFE_FLAG_INSTALLED
))
1861 zlog_debug("LSP dplane notif: matched nh %s (%sinstalled)",
1865 /* Test zebra nhlfe install state */
1866 if (CHECK_FLAG(ctx_nhlfe
->flags
,
1867 NHLFE_FLAG_INSTALLED
)) {
1869 if (!CHECK_FLAG(nhlfe
->flags
,
1870 NHLFE_FLAG_INSTALLED
))
1873 /* Update counter */
1877 if (CHECK_FLAG(nhlfe
->flags
,
1878 NHLFE_FLAG_INSTALLED
))
1883 /* Not mentioned in lfib set -> uninstalled */
1884 if (CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
) ||
1885 CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
) ||
1886 CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
)) {
1891 zlog_debug("LSP dplane notif: no match, nh %s",
1897 *start_counter
+= start_count
;
1899 *end_counter
+= end_count
;
1905 * Update an lsp nhlfe list from a dplane context, typically an async
1906 * notification context. Update the LSP list to match the installed
1907 * status from the context's list.
1909 static int update_nhlfes_from_ctx(struct nhlfe_list_head
*nhlfe_head
,
1910 const struct nhlfe_list_head
*ctx_head
)
1913 zebra_nhlfe_t
*nhlfe
;
1914 const zebra_nhlfe_t
*ctx_nhlfe
;
1915 struct nexthop
*nexthop
;
1916 const struct nexthop
*ctx_nexthop
;
1917 bool is_debug
= (IS_ZEBRA_DEBUG_DPLANE
| IS_ZEBRA_DEBUG_MPLS
);
1919 frr_each_safe(nhlfe_list
, nhlfe_head
, nhlfe
) {
1920 char buf
[NEXTHOP_STRLEN
];
1922 nexthop
= nhlfe
->nexthop
;
1928 frr_each(nhlfe_list_const
, ctx_head
, ctx_nhlfe
) {
1929 ctx_nexthop
= ctx_nhlfe
->nexthop
;
1933 if ((ctx_nexthop
->type
== nexthop
->type
) &&
1934 nexthop_same(ctx_nexthop
, nexthop
)) {
1941 nexthop2str(nexthop
, buf
, sizeof(buf
));
1943 if (ctx_nhlfe
&& ctx_nexthop
) {
1945 /* Bring zebra nhlfe install state into sync */
1946 if (CHECK_FLAG(ctx_nhlfe
->flags
,
1947 NHLFE_FLAG_INSTALLED
)) {
1949 zlog_debug("%s: matched lsp nhlfe %s (installed)",
1952 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
);
1953 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_SELECTED
);
1957 zlog_debug("%s: matched lsp nhlfe %s (not installed)",
1960 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
);
1961 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_SELECTED
);
1964 if (CHECK_FLAG(ctx_nhlfe
->nexthop
->flags
,
1965 NEXTHOP_FLAG_FIB
)) {
1966 SET_FLAG(nhlfe
->nexthop
->flags
,
1967 NEXTHOP_FLAG_ACTIVE
);
1968 SET_FLAG(nhlfe
->nexthop
->flags
,
1971 UNSET_FLAG(nhlfe
->nexthop
->flags
,
1972 NEXTHOP_FLAG_ACTIVE
);
1973 UNSET_FLAG(nhlfe
->nexthop
->flags
,
1978 /* Not mentioned in lfib set -> uninstalled */
1980 zlog_debug("%s: no match for lsp nhlfe %s",
1982 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
);
1983 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_SELECTED
);
1984 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
1985 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
1993 * Process async dplane notifications.
1995 void zebra_mpls_process_dplane_notify(struct zebra_dplane_ctx
*ctx
)
1997 struct zebra_vrf
*zvrf
;
1998 zebra_ile_t tmp_ile
;
1999 struct hash
*lsp_table
;
2001 const struct nhlfe_list_head
*ctx_list
;
2002 int start_count
= 0, end_count
= 0; /* Installed counts */
2003 bool changed_p
= false;
2004 bool is_debug
= (IS_ZEBRA_DEBUG_DPLANE
| IS_ZEBRA_DEBUG_MPLS
);
2007 zlog_debug("LSP dplane notif, in-label %u",
2008 dplane_ctx_get_in_label(ctx
));
2010 /* Look for zebra LSP object */
2011 zvrf
= vrf_info_lookup(VRF_DEFAULT
);
2015 lsp_table
= zvrf
->lsp_table
;
2017 tmp_ile
.in_label
= dplane_ctx_get_in_label(ctx
);
2018 lsp
= hash_lookup(lsp_table
, &tmp_ile
);
2021 zlog_debug("dplane LSP notif: in-label %u not found",
2022 dplane_ctx_get_in_label(ctx
));
2027 * The dataplane/forwarding plane is notifying zebra about the state
2028 * of the nexthops associated with this LSP. First, we take a
2029 * pre-scan pass to determine whether the LSP has transitioned
2030 * from installed -> uninstalled. In that case, we need to have
2031 * the existing state of the LSP objects available before making
2034 ctx_list
= dplane_ctx_get_nhlfe_list(ctx
);
2036 changed_p
= compare_notif_nhlfes(ctx_list
, &lsp
->nhlfe_list
,
2037 &start_count
, &end_count
);
2040 zlog_debug("LSP dplane notif: lfib start_count %d, end_count %d%s",
2041 start_count
, end_count
,
2042 changed_p
? ", changed" : "");
2044 ctx_list
= dplane_ctx_get_backup_nhlfe_list(ctx
);
2046 if (compare_notif_nhlfes(ctx_list
, &lsp
->backup_nhlfe_list
,
2047 &start_count
, &end_count
))
2048 /* Avoid accidentally setting back to 'false' */
2052 zlog_debug("LSP dplane notif: lfib backups, start_count %d, end_count %d%s",
2053 start_count
, end_count
,
2054 changed_p
? ", changed" : "");
2057 * Has the LSP become uninstalled? We need the existing state of the
2058 * nexthops/nhlfes at this point so we know what to delete.
2060 if (start_count
> 0 && end_count
== 0) {
2061 /* Inform other lfibs */
2062 dplane_lsp_notif_update(lsp
, DPLANE_OP_LSP_DELETE
, ctx
);
2066 * Now we take a second pass and bring the zebra
2067 * nexthop state into sync with the forwarding-plane state.
2069 ctx_list
= dplane_ctx_get_nhlfe_list(ctx
);
2070 update_nhlfes_from_ctx(&lsp
->nhlfe_list
, ctx_list
);
2072 ctx_list
= dplane_ctx_get_backup_nhlfe_list(ctx
);
2073 update_nhlfes_from_ctx(&lsp
->backup_nhlfe_list
, ctx_list
);
2075 if (end_count
> 0) {
2076 SET_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
);
2079 dplane_lsp_notif_update(lsp
, DPLANE_OP_LSP_UPDATE
, ctx
);
2082 UNSET_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
);
2083 clear_nhlfe_installed(lsp
);
2087 dplane_ctx_fini(&ctx
);
2091 * Install dynamic LSP entry.
2093 int zebra_mpls_lsp_install(struct zebra_vrf
*zvrf
, struct route_node
*rn
,
2094 struct route_entry
*re
)
2096 struct route_table
*table
;
2099 table
= zvrf
->fec_table
[family2afi(PREFIX_FAMILY(&rn
->p
))];
2103 /* See if there is a configured label binding for this FEC. */
2104 fec
= fec_find(table
, &rn
->p
);
2105 if (!fec
|| fec
->label
== MPLS_INVALID_LABEL
)
2108 /* We cannot install a label forwarding entry if local label is the
2109 * implicit-null label.
2111 if (fec
->label
== MPLS_LABEL_IMPLICIT_NULL
)
2114 if (lsp_install(zvrf
, fec
->label
, rn
, re
))
2121 * Uninstall dynamic LSP entry, if any.
2123 int zebra_mpls_lsp_uninstall(struct zebra_vrf
*zvrf
, struct route_node
*rn
,
2124 struct route_entry
*re
)
2126 struct route_table
*table
;
2129 table
= zvrf
->fec_table
[family2afi(PREFIX_FAMILY(&rn
->p
))];
2133 /* See if there is a configured label binding for this FEC. */
2134 fec
= fec_find(table
, &rn
->p
);
2135 if (!fec
|| fec
->label
== MPLS_INVALID_LABEL
)
2138 /* Uninstall always removes all dynamic NHLFEs. */
2139 return lsp_uninstall(zvrf
, fec
->label
);
2143 * Add an NHLFE to an LSP, return the newly-added object. This path only changes
2144 * the LSP object - nothing is scheduled for processing, for example.
2146 zebra_nhlfe_t
*zebra_mpls_lsp_add_nhlfe(zebra_lsp_t
*lsp
,
2147 enum lsp_types_t lsp_type
,
2148 enum nexthop_types_t gtype
,
2149 const union g_addr
*gate
,
2152 const mpls_label_t
*out_labels
)
2154 /* Just a public pass-through to the internal implementation */
2155 return nhlfe_add(lsp
, lsp_type
, gtype
, gate
, ifindex
, num_labels
,
2156 out_labels
, false /*backup*/);
2160 * Add a backup NHLFE to an LSP, return the newly-added object.
2161 * This path only changes the LSP object - nothing is scheduled for
2162 * processing, for example.
2164 zebra_nhlfe_t
*zebra_mpls_lsp_add_backup_nhlfe(zebra_lsp_t
*lsp
,
2165 enum lsp_types_t lsp_type
,
2166 enum nexthop_types_t gtype
,
2167 const union g_addr
*gate
,
2170 const mpls_label_t
*out_labels
)
2172 /* Just a public pass-through to the internal implementation */
2173 return nhlfe_add(lsp
, lsp_type
, gtype
, gate
, ifindex
, num_labels
,
2178 * Add an NHLFE to an LSP based on a nexthop; return the newly-added object
2180 zebra_nhlfe_t
*zebra_mpls_lsp_add_nh(zebra_lsp_t
*lsp
,
2181 enum lsp_types_t lsp_type
,
2182 const struct nexthop
*nh
)
2184 zebra_nhlfe_t
*nhlfe
;
2186 if (nh
->nh_label
== NULL
|| nh
->nh_label
->num_labels
== 0)
2189 nhlfe
= nhlfe_add(lsp
, lsp_type
, nh
->type
, &nh
->gate
, nh
->ifindex
,
2190 nh
->nh_label
->num_labels
, nh
->nh_label
->label
,
2197 * Add a backup NHLFE to an LSP based on a nexthop;
2198 * return the newly-added object.
2200 zebra_nhlfe_t
*zebra_mpls_lsp_add_backup_nh(zebra_lsp_t
*lsp
,
2201 enum lsp_types_t lsp_type
,
2202 const struct nexthop
*nh
)
2204 zebra_nhlfe_t
*nhlfe
;
2206 if (nh
->nh_label
== NULL
|| nh
->nh_label
->num_labels
== 0)
2209 nhlfe
= nhlfe_add(lsp
, lsp_type
, nh
->type
, &nh
->gate
,
2210 nh
->ifindex
, nh
->nh_label
->num_labels
,
2211 nh
->nh_label
->label
, true);
2217 * Free an allocated NHLFE
2219 void zebra_mpls_nhlfe_free(zebra_nhlfe_t
*nhlfe
)
2221 /* Just a pass-through to the internal implementation */
2226 * Registration from a client for the label binding for a FEC. If a binding
2227 * already exists, it is informed to the client.
2228 * NOTE: If there is a manually configured label binding, that is used.
2229 * Otherwise, if a label index is specified, it means we have to allocate the
2230 * label from a locally configured label block (SRGB), if one exists and index
2231 * is acceptable. If no label index then just register the specified label.
2232 * NOTE2: Either label or label_index is expected to be set to MPLS_INVALID_*
2233 * by the calling function. Register requests with both will be rejected.
2235 int zebra_mpls_fec_register(struct zebra_vrf
*zvrf
, struct prefix
*p
,
2236 uint32_t label
, uint32_t label_index
,
2237 struct zserv
*client
)
2239 struct route_table
*table
;
2242 bool label_change
= false;
2244 bool have_label_index
= (label_index
!= MPLS_INVALID_LABEL_INDEX
);
2245 bool is_configured_fec
= false; /* indicate statically configured FEC */
2247 table
= zvrf
->fec_table
[family2afi(PREFIX_FAMILY(p
))];
2251 if (label
!= MPLS_INVALID_LABEL
&& have_label_index
) {
2253 EC_ZEBRA_FEC_LABEL_INDEX_LABEL_CONFLICT
,
2254 "Rejecting FEC register for %pFX with both label %u and Label Index %u specified, client %s",
2255 p
, label
, label_index
,
2256 zebra_route_string(client
->proto
));
2261 fec
= fec_find(table
, p
);
2263 fec
= fec_add(table
, p
, label
, 0, label_index
);
2266 EC_ZEBRA_FEC_ADD_FAILED
,
2267 "Failed to add FEC %pFX upon register, client %s",
2268 p
, zebra_route_string(client
->proto
));
2272 old_label
= MPLS_INVALID_LABEL
;
2275 /* Check if the FEC has been statically defined in the config */
2276 is_configured_fec
= fec
->flags
& FEC_FLAG_CONFIGURED
;
2277 /* Client may register same FEC with different label index. */
2279 (listnode_lookup(fec
->client_list
, client
) == NULL
);
2280 if (!new_client
&& fec
->label_index
== label_index
2281 && fec
->label
== label
)
2282 /* Duplicate register */
2285 /* Save current label, update the FEC */
2286 old_label
= fec
->label
;
2287 fec
->label_index
= label_index
;
2291 listnode_add(fec
->client_list
, client
);
2293 if (IS_ZEBRA_DEBUG_MPLS
)
2294 zlog_debug("FEC %pFX label%s %u %s by client %s%s", p
,
2295 have_label_index
? " index" : "",
2296 have_label_index
? label_index
: label
,
2297 new_client
? "registered" : "updated",
2298 zebra_route_string(client
->proto
),
2300 ? ", but using statically configured label"
2303 /* If not a statically configured FEC, derive the local label
2304 * from label index or use the provided label
2306 if (!is_configured_fec
) {
2307 if (have_label_index
)
2308 fec_derive_label_from_index(zvrf
, fec
);
2312 /* If no label change, exit. */
2313 if (fec
->label
== old_label
)
2316 label_change
= true;
2319 /* If new client or label change, update client and install or uninstall
2320 * label forwarding entry as needed.
2322 /* Inform client of label, if needed. */
2323 if ((new_client
&& fec
->label
!= MPLS_INVALID_LABEL
) || label_change
) {
2324 if (IS_ZEBRA_DEBUG_MPLS
)
2325 zlog_debug("Update client label %u", fec
->label
);
2326 fec_send(fec
, client
);
2329 if (new_client
|| label_change
)
2330 return fec_change_update_lsp(zvrf
, fec
, old_label
);
2336 * Deregistration from a client for the label binding for a FEC. The FEC
2337 * itself is deleted if no other registered clients exist and there is no
2338 * label bound to the FEC.
2340 int zebra_mpls_fec_unregister(struct zebra_vrf
*zvrf
, struct prefix
*p
,
2341 struct zserv
*client
)
2343 struct route_table
*table
;
2346 table
= zvrf
->fec_table
[family2afi(PREFIX_FAMILY(p
))];
2350 fec
= fec_find(table
, p
);
2352 flog_err(EC_ZEBRA_FEC_RM_FAILED
,
2353 "Failed to find FEC %pFX upon unregister, client %s",
2354 p
, zebra_route_string(client
->proto
));
2358 listnode_delete(fec
->client_list
, client
);
2360 if (IS_ZEBRA_DEBUG_MPLS
)
2361 zlog_debug("FEC %pFX unregistered by client %s", p
,
2362 zebra_route_string(client
->proto
));
2364 /* If not a configured entry, delete the FEC if no other clients. Before
2365 * deleting, see if any LSP needs to be uninstalled.
2367 if (!(fec
->flags
& FEC_FLAG_CONFIGURED
)
2368 && list_isempty(fec
->client_list
)) {
2369 mpls_label_t old_label
= fec
->label
;
2370 fec
->label
= MPLS_INVALID_LABEL
; /* reset */
2371 fec_change_update_lsp(zvrf
, fec
, old_label
);
2379 * Cleanup any FECs registered by this client.
2381 static int zebra_mpls_cleanup_fecs_for_client(struct zserv
*client
)
2383 struct zebra_vrf
*zvrf
= vrf_info_lookup(VRF_DEFAULT
);
2384 struct route_node
*rn
;
2386 struct listnode
*node
;
2387 struct zserv
*fec_client
;
2390 for (af
= AFI_IP
; af
< AFI_MAX
; af
++) {
2391 if (zvrf
->fec_table
[af
] == NULL
)
2394 for (rn
= route_top(zvrf
->fec_table
[af
]); rn
;
2395 rn
= route_next(rn
)) {
2397 if (!fec
|| list_isempty(fec
->client_list
))
2400 for (ALL_LIST_ELEMENTS_RO(fec
->client_list
, node
,
2402 if (fec_client
== client
) {
2403 listnode_delete(fec
->client_list
,
2405 if (!(fec
->flags
& FEC_FLAG_CONFIGURED
)
2406 && list_isempty(fec
->client_list
))
2417 struct lsp_uninstall_args
{
2418 struct hash
*lsp_table
;
2419 enum lsp_types_t type
;
2423 * Cleanup MPLS labels registered by this client.
2425 static int zebra_mpls_cleanup_zclient_labels(struct zserv
*client
)
2428 struct zebra_vrf
*zvrf
;
2430 RB_FOREACH (vrf
, vrf_id_head
, &vrfs_by_id
) {
2431 struct lsp_uninstall_args args
;
2438 args
.lsp_table
= zvrf
->lsp_table
;
2439 args
.type
= lsp_type_from_re_type(client
->proto
);
2440 hash_iterate(zvrf
->lsp_table
, mpls_lsp_uninstall_all_type
,
2444 mpls_ftn_uninstall_all(zvrf
, AFI_IP
,
2445 lsp_type_from_re_type(client
->proto
));
2446 mpls_ftn_uninstall_all(zvrf
, AFI_IP6
,
2447 lsp_type_from_re_type(client
->proto
));
2454 * Return FEC (if any) to which this label is bound.
2455 * Note: Only works for per-prefix binding and when the label is not
2457 * TODO: Currently walks entire table, can optimize later with another
2460 zebra_fec_t
*zebra_mpls_fec_for_label(struct zebra_vrf
*zvrf
,
2463 struct route_node
*rn
;
2467 for (af
= AFI_IP
; af
< AFI_MAX
; af
++) {
2468 if (zvrf
->fec_table
[af
] == NULL
)
2471 for (rn
= route_top(zvrf
->fec_table
[af
]); rn
;
2472 rn
= route_next(rn
)) {
2476 if (fec
->label
== label
)
2485 * Inform if specified label is currently bound to a FEC or not.
2487 int zebra_mpls_label_already_bound(struct zebra_vrf
*zvrf
, mpls_label_t label
)
2489 return (zebra_mpls_fec_for_label(zvrf
, label
) ? 1 : 0);
2493 * Add static FEC to label binding. If there are clients registered for this
2494 * FEC, notify them. If there are labeled routes for this FEC, install the
2495 * label forwarding entry.
2497 int zebra_mpls_static_fec_add(struct zebra_vrf
*zvrf
, struct prefix
*p
,
2498 mpls_label_t in_label
)
2500 struct route_table
*table
;
2502 mpls_label_t old_label
;
2505 table
= zvrf
->fec_table
[family2afi(PREFIX_FAMILY(p
))];
2509 /* Update existing FEC or create a new one. */
2510 fec
= fec_find(table
, p
);
2512 fec
= fec_add(table
, p
, in_label
, FEC_FLAG_CONFIGURED
,
2513 MPLS_INVALID_LABEL_INDEX
);
2515 flog_err(EC_ZEBRA_FEC_ADD_FAILED
,
2516 "Failed to add FEC %pFX upon config", p
);
2520 if (IS_ZEBRA_DEBUG_MPLS
)
2521 zlog_debug("Add fec %pFX label %u", p
, in_label
);
2523 fec
->flags
|= FEC_FLAG_CONFIGURED
;
2524 if (fec
->label
== in_label
)
2525 /* Duplicate config */
2528 /* Label change, update clients. */
2529 old_label
= fec
->label
;
2530 if (IS_ZEBRA_DEBUG_MPLS
)
2531 zlog_debug("Update fec %pFX new label %u", p
, in_label
);
2533 fec
->label
= in_label
;
2534 fec_update_clients(fec
);
2536 /* Update label forwarding entries appropriately */
2537 ret
= fec_change_update_lsp(zvrf
, fec
, old_label
);
2544 * Remove static FEC to label binding. If there are no clients registered
2545 * for this FEC, delete the FEC; else notify clients
2546 * Note: Upon delete of static binding, if label index exists for this FEC,
2547 * client may need to be updated with derived label.
2549 int zebra_mpls_static_fec_del(struct zebra_vrf
*zvrf
, struct prefix
*p
)
2551 struct route_table
*table
;
2553 mpls_label_t old_label
;
2555 table
= zvrf
->fec_table
[family2afi(PREFIX_FAMILY(p
))];
2559 fec
= fec_find(table
, p
);
2561 flog_err(EC_ZEBRA_FEC_RM_FAILED
,
2562 "Failed to find FEC %pFX upon delete", p
);
2566 if (IS_ZEBRA_DEBUG_MPLS
) {
2567 zlog_debug("Delete fec %pFX label %u label index %u", p
,
2568 fec
->label
, fec
->label_index
);
2571 old_label
= fec
->label
;
2572 fec
->flags
&= ~FEC_FLAG_CONFIGURED
;
2573 fec
->label
= MPLS_INVALID_LABEL
;
2575 /* If no client exists, just delete the FEC. */
2576 if (list_isempty(fec
->client_list
)) {
2581 /* Derive the local label (from label index) or reset it. */
2582 fec_derive_label_from_index(zvrf
, fec
);
2584 /* If there is a label change, update clients. */
2585 if (fec
->label
== old_label
)
2587 fec_update_clients(fec
);
2589 /* Update label forwarding entries appropriately */
2590 return fec_change_update_lsp(zvrf
, fec
, old_label
);
2594 * Display MPLS FEC to label binding configuration (VTY command handler).
2596 int zebra_mpls_write_fec_config(struct vty
*vty
, struct zebra_vrf
*zvrf
)
2598 struct route_node
*rn
;
2603 for (af
= AFI_IP
; af
< AFI_MAX
; af
++) {
2604 if (zvrf
->fec_table
[af
] == NULL
)
2607 for (rn
= route_top(zvrf
->fec_table
[af
]); rn
;
2608 rn
= route_next(rn
)) {
2615 if (!(fec
->flags
& FEC_FLAG_CONFIGURED
))
2619 vty_out(vty
, "mpls label bind %pFX %s\n", &rn
->p
,
2620 label2str(fec
->label
, lstr
, BUFSIZ
));
2628 * Display MPLS FEC to label binding (VTY command handler).
2630 void zebra_mpls_print_fec_table(struct vty
*vty
, struct zebra_vrf
*zvrf
)
2632 struct route_node
*rn
;
2635 for (af
= AFI_IP
; af
< AFI_MAX
; af
++) {
2636 if (zvrf
->fec_table
[af
] == NULL
)
2639 for (rn
= route_top(zvrf
->fec_table
[af
]); rn
;
2640 rn
= route_next(rn
)) {
2643 fec_print(rn
->info
, vty
);
2649 * Display MPLS FEC to label binding for a specific FEC (VTY command handler).
2651 void zebra_mpls_print_fec(struct vty
*vty
, struct zebra_vrf
*zvrf
,
2654 struct route_table
*table
;
2655 struct route_node
*rn
;
2657 table
= zvrf
->fec_table
[family2afi(PREFIX_FAMILY(p
))];
2662 rn
= route_node_lookup(table
, p
);
2666 route_unlock_node(rn
);
2670 fec_print(rn
->info
, vty
);
2673 static void mpls_zebra_nhe_update(struct route_entry
*re
, afi_t afi
,
2674 struct nhg_hash_entry
*new_nhe
)
2676 struct nhg_hash_entry
*nhe
;
2678 nhe
= zebra_nhg_rib_find_nhe(new_nhe
, afi
);
2680 route_entry_update_nhe(re
, nhe
);
2683 static bool ftn_update_nexthop(bool add_p
, struct nexthop
*nexthop
,
2684 enum lsp_types_t type
,
2685 const struct zapi_nexthop
*znh
)
2687 if (add_p
&& nexthop
->nh_label_type
== ZEBRA_LSP_NONE
)
2688 nexthop_add_labels(nexthop
, type
, znh
->label_num
, znh
->labels
);
2689 else if (!add_p
&& nexthop
->nh_label_type
== type
)
2690 nexthop_del_labels(nexthop
);
2697 int mpls_ftn_uninstall(struct zebra_vrf
*zvrf
, enum lsp_types_t type
,
2698 struct prefix
*prefix
, uint8_t route_type
,
2699 unsigned short route_instance
)
2701 struct route_table
*table
;
2702 struct route_node
*rn
;
2703 struct route_entry
*re
;
2704 struct nexthop
*nexthop
;
2705 struct nhg_hash_entry
*new_nhe
;
2706 afi_t afi
= family2afi(prefix
->family
);
2709 table
= zebra_vrf_table(afi
, SAFI_UNICAST
, zvrf_id(zvrf
));
2713 /* Lookup existing route */
2714 rn
= route_node_get(table
, prefix
);
2715 RNODE_FOREACH_RE (rn
, re
) {
2716 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
))
2718 if (re
->type
== route_type
&& re
->instance
== route_instance
)
2725 * Nexthops are now shared by multiple routes, so we have to make
2726 * a local copy, modify the copy, then update the route.
2728 new_nhe
= zebra_nhe_copy(re
->nhe
, 0);
2730 for (nexthop
= new_nhe
->nhg
.nexthop
; nexthop
; nexthop
= nexthop
->next
)
2731 nexthop_del_labels(nexthop
);
2733 /* Update backup routes/nexthops also, if present. */
2734 if (zebra_nhg_get_backup_nhg(new_nhe
) != NULL
) {
2735 for (nexthop
= new_nhe
->backup_info
->nhe
->nhg
.nexthop
; nexthop
;
2736 nexthop
= nexthop
->next
)
2737 nexthop_del_labels(nexthop
);
2740 SET_FLAG(re
->status
, ROUTE_ENTRY_CHANGED
);
2741 SET_FLAG(re
->status
, ROUTE_ENTRY_LABELS_CHANGED
);
2743 /* This will create (or ref) a new nhe, so we will discard the local
2746 mpls_zebra_nhe_update(re
, afi
, new_nhe
);
2748 zebra_nhg_free(new_nhe
);
2756 * Iterate through a list of nexthops, for a match for 'znh'. If found,
2757 * update its labels according to 'add_p', and return 'true' if successful.
2759 static bool ftn_update_znh(bool add_p
, enum lsp_types_t type
,
2760 struct nexthop
*head
, const struct zapi_nexthop
*znh
)
2762 bool found
= false, success
= false;
2763 struct nexthop
*nexthop
;
2765 for (nexthop
= head
; nexthop
; nexthop
= nexthop
->next
) {
2766 switch (nexthop
->type
) {
2767 case NEXTHOP_TYPE_IPV4
:
2768 case NEXTHOP_TYPE_IPV4_IFINDEX
:
2769 if (znh
->type
!= NEXTHOP_TYPE_IPV4
2770 && znh
->type
!= NEXTHOP_TYPE_IPV4_IFINDEX
)
2772 if (!IPV4_ADDR_SAME(&nexthop
->gate
.ipv4
,
2775 if (nexthop
->type
== NEXTHOP_TYPE_IPV4_IFINDEX
2776 && nexthop
->ifindex
!= znh
->ifindex
)
2781 if (!ftn_update_nexthop(add_p
, nexthop
, type
, znh
))
2786 case NEXTHOP_TYPE_IPV6
:
2787 case NEXTHOP_TYPE_IPV6_IFINDEX
:
2788 if (znh
->type
!= NEXTHOP_TYPE_IPV6
2789 && znh
->type
!= NEXTHOP_TYPE_IPV6_IFINDEX
)
2791 if (!IPV6_ADDR_SAME(&nexthop
->gate
.ipv6
,
2794 if (nexthop
->type
== NEXTHOP_TYPE_IPV6_IFINDEX
2795 && nexthop
->ifindex
!= znh
->ifindex
)
2800 if (!ftn_update_nexthop(add_p
, nexthop
, type
, znh
))
2816 * Install/uninstall LSP and (optionally) FEC-To-NHLFE (FTN) bindings,
2817 * using zapi message info.
2818 * There are several changes that need to be made, in several zebra
2819 * data structures, so we want to do all the work required at once.
2821 int mpls_zapi_labels_process(bool add_p
, struct zebra_vrf
*zvrf
,
2822 const struct zapi_labels
*zl
)
2824 int i
, counter
, ret
= 0;
2825 char buf
[NEXTHOP_STRLEN
];
2826 const struct zapi_nexthop
*znh
;
2827 struct route_table
*table
;
2828 struct route_node
*rn
= NULL
;
2829 struct route_entry
*re
= NULL
;
2830 struct nhg_hash_entry
*new_nhe
= NULL
;
2833 const struct prefix
*prefix
= NULL
;
2834 struct hash
*lsp_table
;
2835 zebra_ile_t tmp_ile
;
2836 zebra_lsp_t
*lsp
= NULL
;
2838 /* Prep LSP for add case */
2841 lsp_table
= zvrf
->lsp_table
;
2845 /* Find or create LSP object */
2846 tmp_ile
.in_label
= zl
->local_label
;
2847 lsp
= hash_get(lsp_table
, &tmp_ile
, lsp_alloc
);
2852 /* Prep for route/FEC update if requested */
2853 if (CHECK_FLAG(zl
->message
, ZAPI_LABELS_FTN
)) {
2854 prefix
= &zl
->route
.prefix
;
2856 afi
= family2afi(prefix
->family
);
2859 table
= zebra_vrf_table(afi
, SAFI_UNICAST
, zvrf_id(zvrf
));
2861 /* Lookup existing route */
2862 rn
= route_node_get(table
, prefix
);
2863 RNODE_FOREACH_RE(rn
, re
) {
2864 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
))
2866 if (re
->type
== zl
->route
.type
&&
2867 re
->instance
== zl
->route
.instance
)
2874 * Copy over current nexthops into a temporary group.
2875 * We can't just change the values here since the nhgs
2876 * are shared and if the labels change, we'll need
2877 * to find or create a new nhg. We need to create
2878 * a whole temporary group, make changes to it,
2879 * then attach that to the route.
2881 new_nhe
= zebra_nhe_copy(re
->nhe
, 0);
2885 * The old version of the zapi code
2886 * attempted to manage LSPs before trying to
2887 * find a route/FEC, so we'll continue that way.
2889 if (IS_ZEBRA_DEBUG_RECV
|| IS_ZEBRA_DEBUG_MPLS
)
2891 "%s: FTN update requested: no route for prefix %pFX",
2897 * Use info from the zapi nexthops to add/replace/remove LSP/FECs
2901 for (i
= 0; i
< zl
->nexthop_num
; i
++) {
2903 znh
= &zl
->nexthops
[i
];
2905 /* Attempt LSP update */
2907 ret
= lsp_znh_install(lsp
, zl
->type
, znh
);
2909 ret
= mpls_lsp_uninstall(zvrf
, zl
->type
,
2910 zl
->local_label
, znh
->type
,
2911 &znh
->gate
, znh
->ifindex
,
2914 if (IS_ZEBRA_DEBUG_RECV
|| IS_ZEBRA_DEBUG_MPLS
) {
2915 zapi_nexthop2str(znh
, buf
, sizeof(buf
));
2916 zlog_debug("%s: Unable to %sinstall LSP: label %u, znh %s",
2917 __func__
, (add_p
? "" : "un"),
2918 zl
->local_label
, buf
);
2923 /* Attempt route/FEC update if requested */
2927 /* Search the route's nexthops for a match, and update it. */
2928 found
= ftn_update_znh(add_p
, zl
->type
, new_nhe
->nhg
.nexthop
,
2932 } else if (IS_ZEBRA_DEBUG_RECV
| IS_ZEBRA_DEBUG_MPLS
) {
2933 zapi_nexthop2str(znh
, buf
, sizeof(buf
));
2935 "%s: Unable to update FEC: prefix %pFX, label %u, znh %s",
2936 __func__
, prefix
, zl
->local_label
, buf
);
2941 * Process backup LSPs/nexthop entries also. We associate backup
2942 * LSP info with backup nexthops.
2944 if (!CHECK_FLAG(zl
->message
, ZAPI_LABELS_HAS_BACKUPS
))
2947 for (i
= 0; i
< zl
->backup_nexthop_num
; i
++) {
2949 znh
= &zl
->backup_nexthops
[i
];
2952 ret
= lsp_backup_znh_install(lsp
, zl
->type
, znh
);
2954 ret
= mpls_lsp_uninstall(zvrf
, zl
->type
,
2956 znh
->type
, &znh
->gate
,
2957 znh
->ifindex
, true);
2960 if (IS_ZEBRA_DEBUG_RECV
||
2961 IS_ZEBRA_DEBUG_MPLS
) {
2962 zapi_nexthop2str(znh
, buf
, sizeof(buf
));
2963 zlog_debug("%s: Unable to %sinstall backup LSP: label %u, znh %s",
2964 __func__
, (add_p
? "" : "un"),
2965 zl
->local_label
, buf
);
2970 /* Attempt backup nexthop/FEC update if requested */
2971 if (re
== NULL
|| zebra_nhg_get_backup_nhg(new_nhe
) == NULL
)
2974 /* Search the route's backup nexthops for a match
2977 found
= ftn_update_znh(add_p
, zl
->type
,
2978 new_nhe
->backup_info
->nhe
->nhg
.nexthop
,
2982 } else if (IS_ZEBRA_DEBUG_RECV
| IS_ZEBRA_DEBUG_MPLS
) {
2983 zapi_nexthop2str(znh
, buf
, sizeof(buf
));
2985 "%s: Unable to update backup FEC: prefix %pFX, label %u, znh %s",
2986 __func__
, prefix
, zl
->local_label
, buf
);
2993 * If we made changes, update the route, and schedule it
2994 * for rib processing
2996 if (re
!= NULL
&& counter
> 0) {
2999 SET_FLAG(re
->status
, ROUTE_ENTRY_CHANGED
);
3000 SET_FLAG(re
->status
, ROUTE_ENTRY_LABELS_CHANGED
);
3002 mpls_zebra_nhe_update(re
, afi
, new_nhe
);
3008 zebra_nhg_free(new_nhe
);
3014 * Install/update a NHLFE for an LSP in the forwarding table. This may be
3015 * a new LSP entry or a new NHLFE for an existing in-label or an update of
3016 * the out-label for an existing NHLFE (update case).
3018 static zebra_nhlfe_t
*
3019 lsp_add_nhlfe(zebra_lsp_t
*lsp
, enum lsp_types_t type
,
3020 uint8_t num_out_labels
, const mpls_label_t
*out_labels
,
3021 enum nexthop_types_t gtype
, const union g_addr
*gate
,
3022 ifindex_t ifindex
, bool is_backup
)
3024 zebra_nhlfe_t
*nhlfe
;
3025 char buf
[MPLS_LABEL_STRLEN
];
3026 const char *backup_str
;
3029 nhlfe
= nhlfe_find(&lsp
->backup_nhlfe_list
, type
, gtype
,
3031 backup_str
= "backup ";
3033 nhlfe
= nhlfe_find(&lsp
->nhlfe_list
, type
, gtype
, gate
,
3039 struct nexthop
*nh
= nhlfe
->nexthop
;
3042 assert(nh
->nh_label
);
3044 /* Clear deleted flag (in case it was set) */
3045 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
);
3046 if (nh
->nh_label
->num_labels
== num_out_labels
3047 && !memcmp(nh
->nh_label
->label
, out_labels
,
3048 sizeof(mpls_label_t
) * num_out_labels
))
3052 if (IS_ZEBRA_DEBUG_MPLS
) {
3053 char buf2
[MPLS_LABEL_STRLEN
];
3054 char buf3
[MPLS_LABEL_STRLEN
];
3056 nhlfe2str(nhlfe
, buf
, sizeof(buf
));
3057 mpls_label2str(num_out_labels
, out_labels
, buf2
,
3059 mpls_label2str(nh
->nh_label
->num_labels
,
3060 nh
->nh_label
->label
, buf3
, sizeof(buf3
),
3063 zlog_debug("LSP in-label %u type %d %snexthop %s out-label(s) changed to %s (old %s)",
3064 lsp
->ile
.in_label
, type
, backup_str
, buf
,
3068 /* Update out label(s), trigger processing. */
3069 if (nh
->nh_label
->num_labels
== num_out_labels
)
3070 memcpy(nh
->nh_label
->label
, out_labels
,
3071 sizeof(mpls_label_t
) * num_out_labels
);
3073 nexthop_del_labels(nh
);
3074 nexthop_add_labels(nh
, type
, num_out_labels
,
3078 /* Add LSP entry to this nexthop */
3079 nhlfe
= nhlfe_add(lsp
, type
, gtype
, gate
, ifindex
,
3080 num_out_labels
, out_labels
, is_backup
);
3084 if (IS_ZEBRA_DEBUG_MPLS
) {
3085 char buf2
[MPLS_LABEL_STRLEN
];
3087 nhlfe2str(nhlfe
, buf
, sizeof(buf
));
3088 mpls_label2str(num_out_labels
, out_labels
, buf2
,
3091 zlog_debug("Add LSP in-label %u type %d %snexthop %s out-label(s) %s",
3092 lsp
->ile
.in_label
, type
, backup_str
, buf
,
3096 lsp
->addr_family
= NHLFE_FAMILY(nhlfe
);
3099 /* Mark NHLFE, queue LSP for processing. */
3100 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_CHANGED
);
3106 * Install an LSP and forwarding entry; used primarily
3107 * from vrf zapi message processing.
3109 int mpls_lsp_install(struct zebra_vrf
*zvrf
, enum lsp_types_t type
,
3110 mpls_label_t in_label
, uint8_t num_out_labels
,
3111 const mpls_label_t
*out_labels
, enum nexthop_types_t gtype
,
3112 const union g_addr
*gate
, ifindex_t ifindex
)
3114 struct hash
*lsp_table
;
3115 zebra_ile_t tmp_ile
;
3117 zebra_nhlfe_t
*nhlfe
;
3120 lsp_table
= zvrf
->lsp_table
;
3124 /* Find or create LSP object */
3125 tmp_ile
.in_label
= in_label
;
3126 lsp
= hash_get(lsp_table
, &tmp_ile
, lsp_alloc
);
3130 nhlfe
= lsp_add_nhlfe(lsp
, type
, num_out_labels
, out_labels
, gtype
,
3131 gate
, ifindex
, false /*backup*/);
3135 /* Queue LSP for processing. */
3136 if (lsp_processq_add(lsp
))
3143 * Install or replace NHLFE, using info from zapi nexthop
3145 static int lsp_znh_install(zebra_lsp_t
*lsp
, enum lsp_types_t type
,
3146 const struct zapi_nexthop
*znh
)
3148 zebra_nhlfe_t
*nhlfe
;
3150 nhlfe
= lsp_add_nhlfe(lsp
, type
, znh
->label_num
, znh
->labels
,
3151 znh
->type
, &znh
->gate
, znh
->ifindex
,
3156 /* Update backup info if present */
3157 if (CHECK_FLAG(znh
->flags
, ZAPI_NEXTHOP_FLAG_HAS_BACKUP
)) {
3158 if (znh
->backup_num
> NEXTHOP_MAX_BACKUPS
) {
3163 nhlfe
->nexthop
->backup_num
= znh
->backup_num
;
3164 memcpy(nhlfe
->nexthop
->backup_idx
, znh
->backup_idx
,
3166 SET_FLAG(nhlfe
->nexthop
->flags
, NEXTHOP_FLAG_HAS_BACKUP
);
3168 /* Ensure there's no stale backup info */
3169 UNSET_FLAG(nhlfe
->nexthop
->flags
, NEXTHOP_FLAG_HAS_BACKUP
);
3170 nhlfe
->nexthop
->backup_num
= 0;
3173 /* Queue LSP for processing. */
3174 if (lsp_processq_add(lsp
))
3181 * Install/update backup NHLFE for an LSP, using info from a zapi message.
3183 static int lsp_backup_znh_install(zebra_lsp_t
*lsp
, enum lsp_types_t type
,
3184 const struct zapi_nexthop
*znh
)
3186 zebra_nhlfe_t
*nhlfe
;
3188 nhlfe
= lsp_add_nhlfe(lsp
, type
, znh
->label_num
,
3189 znh
->labels
, znh
->type
, &znh
->gate
,
3190 znh
->ifindex
, true /*backup*/);
3191 if (nhlfe
== NULL
) {
3192 if (IS_ZEBRA_DEBUG_MPLS
)
3193 zlog_debug("%s: unable to add backup nhlfe, label: %u",
3194 __func__
, lsp
->ile
.in_label
);
3198 /* Queue LSP for processing. */
3199 if (lsp_processq_add(lsp
))
3205 zebra_lsp_t
*mpls_lsp_find(struct zebra_vrf
*zvrf
, mpls_label_t in_label
)
3207 struct hash
*lsp_table
;
3208 zebra_ile_t tmp_ile
;
3211 lsp_table
= zvrf
->lsp_table
;
3215 /* If entry is not present, exit. */
3216 tmp_ile
.in_label
= in_label
;
3217 return hash_lookup(lsp_table
, &tmp_ile
);
3221 * Uninstall a particular NHLFE in the forwarding table. If this is
3222 * the only NHLFE, the entire LSP forwarding entry has to be deleted.
3224 int mpls_lsp_uninstall(struct zebra_vrf
*zvrf
, enum lsp_types_t type
,
3225 mpls_label_t in_label
, enum nexthop_types_t gtype
,
3226 const union g_addr
*gate
, ifindex_t ifindex
,
3229 struct hash
*lsp_table
;
3230 zebra_ile_t tmp_ile
;
3232 zebra_nhlfe_t
*nhlfe
;
3233 char buf
[NEXTHOP_STRLEN
];
3234 bool schedule_lsp
= false;
3237 lsp_table
= zvrf
->lsp_table
;
3241 /* If entry is not present, exit. */
3242 tmp_ile
.in_label
= in_label
;
3243 lsp
= hash_lookup(lsp_table
, &tmp_ile
);
3248 nhlfe
= nhlfe_find(&lsp
->backup_nhlfe_list
, type
, gtype
,
3251 nhlfe
= nhlfe_find(&lsp
->nhlfe_list
, type
, gtype
, gate
,
3256 if (IS_ZEBRA_DEBUG_MPLS
) {
3257 nhlfe2str(nhlfe
, buf
, sizeof(buf
));
3258 zlog_debug("Del LSP in-label %u type %d nexthop %s flags 0x%x",
3259 in_label
, type
, buf
, nhlfe
->flags
);
3262 if (CHECK_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
) ||
3263 CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
))
3264 schedule_lsp
= true;
3266 /* Mark NHLFE for delete or directly delete, as appropriate. */
3268 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
);
3269 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_CHANGED
);
3271 if (IS_ZEBRA_DEBUG_MPLS
)
3272 zlog_debug("Schedule LSP in-label %u flags 0x%x",
3273 lsp
->ile
.in_label
, lsp
->flags
);
3274 if (lsp_processq_add(lsp
))
3279 /* Free LSP entry if no other NHLFEs and not scheduled. */
3280 lsp_check_free(lsp_table
, &lsp
);
3285 int mpls_lsp_uninstall_all_vrf(struct zebra_vrf
*zvrf
, enum lsp_types_t type
,
3286 mpls_label_t in_label
)
3288 struct hash
*lsp_table
;
3289 zebra_ile_t tmp_ile
;
3293 lsp_table
= zvrf
->lsp_table
;
3297 /* If entry is not present, exit. */
3298 tmp_ile
.in_label
= in_label
;
3299 lsp
= hash_lookup(lsp_table
, &tmp_ile
);
3303 return mpls_lsp_uninstall_all(lsp_table
, lsp
, type
);
3307 * Uninstall all NHLFEs for a particular LSP forwarding entry.
3308 * If no other NHLFEs exist, the entry would be deleted.
3310 static void mpls_lsp_uninstall_all_type(struct hash_bucket
*bucket
, void *ctxt
)
3312 struct lsp_uninstall_args
*args
= ctxt
;
3314 struct hash
*lsp_table
;
3316 lsp
= (zebra_lsp_t
*)bucket
->data
;
3317 if (nhlfe_list_first(&lsp
->nhlfe_list
) == NULL
)
3320 lsp_table
= args
->lsp_table
;
3324 mpls_lsp_uninstall_all(lsp_table
, lsp
, args
->type
);
3328 * Uninstall all FEC-To-NHLFE (FTN) bindings of the given address-family and
3331 static void mpls_ftn_uninstall_all(struct zebra_vrf
*zvrf
,
3332 int afi
, enum lsp_types_t lsp_type
)
3334 struct route_table
*table
;
3335 struct route_node
*rn
;
3336 struct route_entry
*re
;
3337 struct nexthop
*nexthop
;
3338 struct nexthop_group
*nhg
;
3341 /* Process routes of interested address-families. */
3342 table
= zebra_vrf_table(afi
, SAFI_UNICAST
, zvrf_id(zvrf
));
3346 for (rn
= route_top(table
); rn
; rn
= route_next(rn
)) {
3349 RNODE_FOREACH_RE (rn
, re
) {
3350 struct nhg_hash_entry
*new_nhe
;
3352 new_nhe
= zebra_nhe_copy(re
->nhe
, 0);
3354 nhg
= &new_nhe
->nhg
;
3355 for (nexthop
= nhg
->nexthop
; nexthop
;
3356 nexthop
= nexthop
->next
) {
3357 if (nexthop
->nh_label_type
!= lsp_type
)
3360 nexthop_del_labels(nexthop
);
3361 SET_FLAG(re
->status
, ROUTE_ENTRY_CHANGED
);
3362 SET_FLAG(re
->status
,
3363 ROUTE_ENTRY_LABELS_CHANGED
);
3367 /* Check for backup info and update that also */
3368 nhg
= zebra_nhg_get_backup_nhg(new_nhe
);
3370 for (nexthop
= nhg
->nexthop
; nexthop
;
3371 nexthop
= nexthop
->next
) {
3372 if (nexthop
->nh_label_type
!= lsp_type
)
3375 nexthop_del_labels(nexthop
);
3376 SET_FLAG(re
->status
,
3377 ROUTE_ENTRY_CHANGED
);
3378 SET_FLAG(re
->status
,
3379 ROUTE_ENTRY_LABELS_CHANGED
);
3384 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_LABELS_CHANGED
))
3385 mpls_zebra_nhe_update(re
, afi
, new_nhe
);
3387 zebra_nhg_free(new_nhe
);
3395 #if defined(HAVE_CUMULUS)
3397 * Check that the label values used in LSP creation are consistent. The
3398 * main criteria is that if there is ECMP, the label operation must still
3399 * be consistent - i.e., all paths either do a swap or do PHP. This is due
3400 * to current HW restrictions.
3402 int zebra_mpls_lsp_label_consistent(struct zebra_vrf
*zvrf
,
3403 mpls_label_t in_label
,
3404 mpls_label_t out_label
,
3405 enum nexthop_types_t gtype
,
3406 union g_addr
*gate
, ifindex_t ifindex
)
3408 struct hash
*slsp_table
;
3409 zebra_ile_t tmp_ile
;
3411 zebra_nhlfe_t
*nhlfe
;
3412 const struct nexthop
*nh
;
3415 slsp_table
= zvrf
->slsp_table
;
3419 /* If entry is not present, exit. */
3420 tmp_ile
.in_label
= in_label
;
3421 lsp
= hash_lookup(slsp_table
, &tmp_ile
);
3425 nhlfe
= nhlfe_find(&lsp
->nhlfe_list
, ZEBRA_LSP_STATIC
,
3426 gtype
, gate
, ifindex
);
3428 nh
= nhlfe
->nexthop
;
3430 if (nh
== NULL
|| nh
->nh_label
== NULL
)
3433 if (nh
->nh_label
->label
[0] == out_label
)
3436 /* If not only NHLFE, cannot allow label change. */
3437 if (nhlfe
!= nhlfe_list_first(&lsp
->nhlfe_list
) ||
3438 nhlfe_list_next(&lsp
->nhlfe_list
, nhlfe
) != NULL
)
3441 /* If other NHLFEs exist, label operation must match. */
3442 nhlfe
= nhlfe_list_first(&lsp
->nhlfe_list
);
3443 if (nhlfe
!= NULL
) {
3446 nh
= nhlfe
->nexthop
;
3448 if (nh
== NULL
|| nh
->nh_label
== NULL
)
3451 cur_op
= (nh
->nh_label
->label
[0] ==
3452 MPLS_LABEL_IMPLICIT_NULL
);
3453 new_op
= (out_label
== MPLS_LABEL_IMPLICIT_NULL
);
3454 if (cur_op
!= new_op
)
3459 /* Label values are good. */
3462 #endif /* HAVE_CUMULUS */
3465 * Add static LSP entry. This may be the first entry for this incoming label
3466 * or an additional nexthop; an existing entry may also have outgoing label
3468 * Note: The label operation (swap or PHP) is common for the LSP entry (all
3471 int zebra_mpls_static_lsp_add(struct zebra_vrf
*zvrf
, mpls_label_t in_label
,
3472 mpls_label_t out_label
,
3473 enum nexthop_types_t gtype
, union g_addr
*gate
,
3476 struct hash
*slsp_table
;
3477 zebra_ile_t tmp_ile
;
3479 zebra_nhlfe_t
*nhlfe
;
3483 slsp_table
= zvrf
->slsp_table
;
3487 /* Find or create LSP. */
3488 tmp_ile
.in_label
= in_label
;
3489 lsp
= hash_get(slsp_table
, &tmp_ile
, lsp_alloc
);
3493 nhlfe
= nhlfe_find(&lsp
->nhlfe_list
, ZEBRA_LSP_STATIC
, gtype
, gate
,
3496 struct nexthop
*nh
= nhlfe
->nexthop
;
3499 assert(nh
->nh_label
);
3501 /* Compare existing nexthop */
3502 if (nh
->nh_label
->num_labels
== 1 &&
3503 nh
->nh_label
->label
[0] == out_label
)
3507 if (IS_ZEBRA_DEBUG_MPLS
) {
3508 nhlfe2str(nhlfe
, buf
, sizeof(buf
));
3510 "Upd static LSP in-label %u nexthop %s out-label %u (old %u)",
3511 in_label
, buf
, out_label
,
3512 nh
->nh_label
->label
[0]);
3514 if (nh
->nh_label
->num_labels
== 1)
3515 nh
->nh_label
->label
[0] = out_label
;
3517 nexthop_del_labels(nh
);
3518 nexthop_add_labels(nh
, ZEBRA_LSP_STATIC
, 1, &out_label
);
3522 /* Add static LSP entry to this nexthop */
3523 nhlfe
= nhlfe_add(lsp
, ZEBRA_LSP_STATIC
, gtype
, gate
,
3524 ifindex
, 1, &out_label
, false /*backup*/);
3528 if (IS_ZEBRA_DEBUG_MPLS
) {
3529 nhlfe2str(nhlfe
, buf
, sizeof(buf
));
3531 "Add static LSP in-label %u nexthop %s out-label %u",
3532 in_label
, buf
, out_label
);
3536 /* (Re)Install LSP in the main table. */
3537 if (mpls_lsp_install(zvrf
, ZEBRA_LSP_STATIC
, in_label
, 1, &out_label
,
3538 gtype
, gate
, ifindex
))
3545 * Delete static LSP entry. This may be the delete of one particular
3546 * NHLFE for this incoming label or the delete of the entire entry (i.e.,
3548 * NOTE: Delete of the only NHLFE will also end up deleting the entire
3549 * LSP configuration.
3551 int zebra_mpls_static_lsp_del(struct zebra_vrf
*zvrf
, mpls_label_t in_label
,
3552 enum nexthop_types_t gtype
, union g_addr
*gate
,
3555 struct hash
*slsp_table
;
3556 zebra_ile_t tmp_ile
;
3558 zebra_nhlfe_t
*nhlfe
;
3561 slsp_table
= zvrf
->slsp_table
;
3565 /* If entry is not present, exit. */
3566 tmp_ile
.in_label
= in_label
;
3567 lsp
= hash_lookup(slsp_table
, &tmp_ile
);
3571 /* Is it delete of entire LSP or a specific NHLFE? */
3572 if (gtype
== NEXTHOP_TYPE_BLACKHOLE
) {
3573 if (IS_ZEBRA_DEBUG_MPLS
)
3574 zlog_debug("Del static LSP in-label %u", in_label
);
3576 /* Uninstall entire LSP from the main table. */
3577 mpls_static_lsp_uninstall_all(zvrf
, in_label
);
3579 /* Delete all static NHLFEs */
3580 frr_each_safe(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
3584 /* Find specific NHLFE, exit if not found. */
3585 nhlfe
= nhlfe_find(&lsp
->nhlfe_list
, ZEBRA_LSP_STATIC
,
3586 gtype
, gate
, ifindex
);
3590 if (IS_ZEBRA_DEBUG_MPLS
) {
3592 nhlfe2str(nhlfe
, buf
, sizeof(buf
));
3593 zlog_debug("Del static LSP in-label %u nexthop %s",
3597 /* Uninstall LSP from the main table. */
3598 mpls_lsp_uninstall(zvrf
, ZEBRA_LSP_STATIC
, in_label
, gtype
,
3599 gate
, ifindex
, false);
3601 /* Delete static LSP NHLFE */
3605 /* Remove entire static LSP entry if no NHLFE - valid in either case
3608 if (nhlfe_list_first(&lsp
->nhlfe_list
) == NULL
) {
3609 lsp
= hash_release(slsp_table
, &tmp_ile
);
3610 XFREE(MTYPE_LSP
, lsp
);
3617 * Schedule all MPLS label forwarding entries for processing.
3618 * Called upon changes that may affect one or more of them such as
3619 * interface or nexthop state changes.
3621 void zebra_mpls_lsp_schedule(struct zebra_vrf
*zvrf
)
3625 hash_iterate(zvrf
->lsp_table
, lsp_schedule
, NULL
);
3629 * Display MPLS label forwarding table for a specific LSP
3630 * (VTY command handler).
3632 void zebra_mpls_print_lsp(struct vty
*vty
, struct zebra_vrf
*zvrf
,
3633 mpls_label_t label
, bool use_json
)
3635 struct hash
*lsp_table
;
3637 zebra_ile_t tmp_ile
;
3638 json_object
*json
= NULL
;
3641 lsp_table
= zvrf
->lsp_table
;
3645 /* If entry is not present, exit. */
3646 tmp_ile
.in_label
= label
;
3647 lsp
= hash_lookup(lsp_table
, &tmp_ile
);
3652 json
= lsp_json(lsp
);
3653 vty_out(vty
, "%s\n", json_object_to_json_string_ext(
3654 json
, JSON_C_TO_STRING_PRETTY
));
3655 json_object_free(json
);
3657 lsp_print(vty
, lsp
);
3661 * Display MPLS label forwarding table (VTY command handler).
3663 void zebra_mpls_print_lsp_table(struct vty
*vty
, struct zebra_vrf
*zvrf
,
3667 json_object
*json
= NULL
;
3668 zebra_lsp_t
*lsp
= NULL
;
3669 zebra_nhlfe_t
*nhlfe
= NULL
;
3670 struct listnode
*node
= NULL
;
3671 struct list
*lsp_list
= hash_get_sorted_list(zvrf
->lsp_table
, lsp_cmp
);
3674 json
= json_object_new_object();
3676 for (ALL_LIST_ELEMENTS_RO(lsp_list
, node
, lsp
))
3677 json_object_object_add(
3678 json
, label2str(lsp
->ile
.in_label
, buf
,
3682 vty_out(vty
, "%s\n", json_object_to_json_string_ext(
3683 json
, JSON_C_TO_STRING_PRETTY
));
3684 json_object_free(json
);
3688 /* Prepare table. */
3689 tt
= ttable_new(&ttable_styles
[TTSTYLE_BLANK
]);
3690 ttable_add_row(tt
, "Inbound Label|Type|Nexthop|Outbound Label");
3691 tt
->style
.cell
.rpad
= 2;
3692 tt
->style
.corner
= '+';
3694 ttable_rowseps(tt
, 0, BOTTOM
, true, '-');
3696 for (ALL_LIST_ELEMENTS_RO(lsp_list
, node
, lsp
)) {
3697 frr_each_safe(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
3698 struct nexthop
*nexthop
;
3699 const char *out_label_str
;
3700 char nh_buf
[NEXTHOP_STRLEN
];
3702 nexthop
= nhlfe
->nexthop
;
3704 switch (nexthop
->type
) {
3705 case NEXTHOP_TYPE_IFINDEX
: {
3706 struct zebra_ns
*zns
;
3707 struct interface
*ifp
;
3709 zns
= zebra_ns_lookup(NS_DEFAULT
);
3710 ifp
= if_lookup_by_index_per_ns(
3711 zns
, nexthop
->ifindex
);
3712 snprintf(nh_buf
, sizeof(nh_buf
), "%s",
3713 ifp
? ifp
->name
: "Null");
3716 case NEXTHOP_TYPE_IPV4
:
3717 case NEXTHOP_TYPE_IPV4_IFINDEX
:
3718 inet_ntop(AF_INET
, &nexthop
->gate
.ipv4
,
3719 nh_buf
, sizeof(nh_buf
));
3721 case NEXTHOP_TYPE_IPV6
:
3722 case NEXTHOP_TYPE_IPV6_IFINDEX
:
3723 inet_ntop(AF_INET6
, &nexthop
->gate
.ipv6
,
3724 nh_buf
, sizeof(nh_buf
));
3730 if (nexthop
->type
!= NEXTHOP_TYPE_IFINDEX
)
3731 out_label_str
= mpls_label2str(
3732 nexthop
->nh_label
->num_labels
,
3733 &nexthop
->nh_label
->label
[0],
3734 buf
, sizeof(buf
), 1);
3736 out_label_str
= "-";
3738 ttable_add_row(tt
, "%u|%s|%s|%s",
3740 nhlfe_type2str(nhlfe
->type
),
3741 nh_buf
, out_label_str
);
3745 /* Dump the generated table. */
3746 if (tt
->nrows
> 1) {
3747 char *table
= ttable_dump(tt
, "\n");
3748 vty_out(vty
, "%s\n", table
);
3749 XFREE(MTYPE_TMP
, table
);
3754 list_delete(&lsp_list
);
3758 * Create printable string for static LSP configuration.
3760 static char *nhlfe_config_str(const zebra_nhlfe_t
*nhlfe
, char *buf
, int size
)
3762 const struct nexthop
*nh
;
3764 nh
= nhlfe
->nexthop
;
3768 case NEXTHOP_TYPE_IPV4
:
3769 inet_ntop(AF_INET
, &nh
->gate
.ipv4
, buf
, size
);
3771 case NEXTHOP_TYPE_IPV6
:
3772 case NEXTHOP_TYPE_IPV6_IFINDEX
:
3773 inet_ntop(AF_INET6
, &nh
->gate
.ipv6
, buf
, size
);
3776 ifindex2ifname(nh
->ifindex
, VRF_DEFAULT
),
3787 * Display MPLS LSP configuration of all static LSPs (VTY command handler).
3789 int zebra_mpls_write_lsp_config(struct vty
*vty
, struct zebra_vrf
*zvrf
)
3792 zebra_nhlfe_t
*nhlfe
;
3794 struct listnode
*node
;
3795 struct list
*slsp_list
=
3796 hash_get_sorted_list(zvrf
->slsp_table
, lsp_cmp
);
3798 for (ALL_LIST_ELEMENTS_RO(slsp_list
, node
, lsp
)) {
3799 frr_each(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
3803 nh
= nhlfe
->nexthop
;
3804 if (nh
== NULL
|| nh
->nh_label
== NULL
)
3807 nhlfe_config_str(nhlfe
, buf
, sizeof(buf
));
3809 switch (nh
->nh_label
->label
[0]) {
3810 case MPLS_LABEL_IPV4_EXPLICIT_NULL
:
3811 case MPLS_LABEL_IPV6_EXPLICIT_NULL
:
3812 strlcpy(lstr
, "explicit-null", sizeof(lstr
));
3814 case MPLS_LABEL_IMPLICIT_NULL
:
3815 strlcpy(lstr
, "implicit-null", sizeof(lstr
));
3818 snprintf(lstr
, sizeof(lstr
), "%u",
3819 nh
->nh_label
->label
[0]);
3823 vty_out(vty
, "mpls lsp %u %s %s\n", lsp
->ile
.in_label
,
3828 list_delete(&slsp_list
);
3829 return (zvrf
->slsp_table
->count
? 1 : 0);
3833 * Add/update global label block.
3835 int zebra_mpls_label_block_add(struct zebra_vrf
*zvrf
, uint32_t start_label
,
3838 zvrf
->mpls_srgb
.start_label
= start_label
;
3839 zvrf
->mpls_srgb
.end_label
= end_label
;
3841 /* Evaluate registered FECs to see if any get a label or not. */
3847 * Delete global label block.
3849 int zebra_mpls_label_block_del(struct zebra_vrf
*zvrf
)
3851 zvrf
->mpls_srgb
.start_label
= MPLS_DEFAULT_MIN_SRGB_LABEL
;
3852 zvrf
->mpls_srgb
.end_label
= MPLS_DEFAULT_MAX_SRGB_LABEL
;
3854 /* Process registered FECs to clear their local label, if needed. */
3860 * Display MPLS global label block configuration (VTY command handler).
3862 int zebra_mpls_write_label_block_config(struct vty
*vty
, struct zebra_vrf
*zvrf
)
3864 if (zvrf
->mpls_srgb
.start_label
== 0)
3867 if ((zvrf
->mpls_srgb
.start_label
!= MPLS_DEFAULT_MIN_SRGB_LABEL
)
3868 || (zvrf
->mpls_srgb
.end_label
!= MPLS_DEFAULT_MAX_SRGB_LABEL
)) {
3869 vty_out(vty
, "mpls label global-block %u %u\n",
3870 zvrf
->mpls_srgb
.start_label
, zvrf
->mpls_srgb
.end_label
);
3877 * Called when VRF becomes inactive, cleans up information but keeps
3880 void zebra_mpls_cleanup_tables(struct zebra_vrf
*zvrf
)
3882 struct zebra_vrf
*def_zvrf
;
3885 if (zvrf_id(zvrf
) == VRF_DEFAULT
)
3886 hash_iterate(zvrf
->lsp_table
, lsp_uninstall_from_kernel
, NULL
);
3889 * For other vrfs, we try to remove associated LSPs; we locate
3890 * the LSPs in the default vrf.
3892 def_zvrf
= zebra_vrf_lookup_by_id(VRF_DEFAULT
);
3894 /* At shutdown, the default may be gone already */
3895 if (def_zvrf
== NULL
)
3898 for (afi
= AFI_IP
; afi
< AFI_MAX
; afi
++) {
3899 if (zvrf
->label
[afi
] != MPLS_LABEL_NONE
)
3900 lsp_uninstall(def_zvrf
, zvrf
->label
[afi
]);
3906 * Called upon process exiting, need to delete LSP forwarding
3907 * entries from the kernel.
3908 * NOTE: Currently supported only for default VRF.
3910 void zebra_mpls_close_tables(struct zebra_vrf
*zvrf
)
3912 hash_iterate(zvrf
->lsp_table
, lsp_uninstall_from_kernel
, NULL
);
3913 hash_clean(zvrf
->lsp_table
, NULL
);
3914 hash_free(zvrf
->lsp_table
);
3915 hash_clean(zvrf
->slsp_table
, NULL
);
3916 hash_free(zvrf
->slsp_table
);
3917 route_table_finish(zvrf
->fec_table
[AFI_IP
]);
3918 route_table_finish(zvrf
->fec_table
[AFI_IP6
]);
3922 * Allocate MPLS tables for this VRF and do other initialization.
3923 * NOTE: Currently supported only for default VRF.
3925 void zebra_mpls_init_tables(struct zebra_vrf
*zvrf
)
3930 hash_create(label_hash
, label_cmp
, "ZEBRA SLSP table");
3931 zvrf
->lsp_table
= hash_create(label_hash
, label_cmp
, "ZEBRA LSP table");
3932 zvrf
->fec_table
[AFI_IP
] = route_table_init();
3933 zvrf
->fec_table
[AFI_IP6
] = route_table_init();
3934 zvrf
->mpls_flags
= 0;
3935 zvrf
->mpls_srgb
.start_label
= MPLS_DEFAULT_MIN_SRGB_LABEL
;
3936 zvrf
->mpls_srgb
.end_label
= MPLS_DEFAULT_MAX_SRGB_LABEL
;
3940 * Global MPLS initialization.
3942 void zebra_mpls_init(void)
3946 if (mpls_kernel_init() < 0) {
3947 flog_warn(EC_ZEBRA_MPLS_SUPPORT_DISABLED
,
3948 "Disabling MPLS support (no kernel support)");
3952 if (!mpls_processq_init())
3955 hook_register(zserv_client_close
, zebra_mpls_cleanup_fecs_for_client
);
3956 hook_register(zserv_client_close
, zebra_mpls_cleanup_zclient_labels
);