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");
57 bool mpls_pw_reach_strict
; /* Strict reachability checking */
59 /* static function declarations */
61 static void fec_evaluate(struct zebra_vrf
*zvrf
);
62 static uint32_t fec_derive_label_from_index(struct zebra_vrf
*vrf
,
63 struct zebra_fec
*fec
);
64 static int lsp_install(struct zebra_vrf
*zvrf
, mpls_label_t label
,
65 struct route_node
*rn
, struct route_entry
*re
);
66 static int lsp_uninstall(struct zebra_vrf
*zvrf
, mpls_label_t label
);
67 static int fec_change_update_lsp(struct zebra_vrf
*zvrf
, struct zebra_fec
*fec
,
68 mpls_label_t old_label
);
69 static int fec_send(struct zebra_fec
*fec
, struct zserv
*client
);
70 static void fec_update_clients(struct zebra_fec
*fec
);
71 static void fec_print(struct zebra_fec
*fec
, struct vty
*vty
);
72 static struct zebra_fec
*fec_find(struct route_table
*table
, struct prefix
*p
);
73 static struct zebra_fec
*fec_add(struct route_table
*table
, struct prefix
*p
,
74 mpls_label_t label
, uint32_t flags
,
75 uint32_t label_index
);
76 static int fec_del(struct zebra_fec
*fec
);
78 static unsigned int label_hash(const void *p
);
79 static bool label_cmp(const void *p1
, const void *p2
);
80 static int nhlfe_nexthop_active_ipv4(struct zebra_nhlfe
*nhlfe
,
81 struct nexthop
*nexthop
);
82 static int nhlfe_nexthop_active_ipv6(struct zebra_nhlfe
*nhlfe
,
83 struct nexthop
*nexthop
);
84 static int nhlfe_nexthop_active(struct zebra_nhlfe
*nhlfe
);
86 static void lsp_select_best_nhlfe(struct zebra_lsp
*lsp
);
87 static void lsp_uninstall_from_kernel(struct hash_bucket
*bucket
, void *ctxt
);
88 static void lsp_schedule(struct hash_bucket
*bucket
, void *ctxt
);
89 static wq_item_status
lsp_process(struct work_queue
*wq
, void *data
);
90 static void lsp_processq_del(struct work_queue
*wq
, void *data
);
91 static void lsp_processq_complete(struct work_queue
*wq
);
92 static int lsp_processq_add(struct zebra_lsp
*lsp
);
93 static void *lsp_alloc(void *p
);
95 /* Check whether lsp can be freed - no nhlfes, e.g., and call free api */
96 static void lsp_check_free(struct hash
*lsp_table
, struct zebra_lsp
**plsp
);
98 /* Free lsp; sets caller's pointer to NULL */
99 static void lsp_free(struct hash
*lsp_table
, struct zebra_lsp
**plsp
);
101 static char *nhlfe2str(const struct zebra_nhlfe
*nhlfe
, char *buf
, int size
);
102 static char *nhlfe_config_str(const struct zebra_nhlfe
*nhlfe
, char *buf
,
104 static int nhlfe_nhop_match(struct zebra_nhlfe
*nhlfe
,
105 enum nexthop_types_t gtype
,
106 const union g_addr
*gate
, ifindex_t ifindex
);
107 static struct zebra_nhlfe
*nhlfe_find(struct nhlfe_list_head
*list
,
108 enum lsp_types_t lsp_type
,
109 enum nexthop_types_t gtype
,
110 const union g_addr
*gate
,
112 static struct zebra_nhlfe
*
113 nhlfe_add(struct zebra_lsp
*lsp
, enum lsp_types_t lsp_type
,
114 enum nexthop_types_t gtype
, const union g_addr
*gate
,
115 ifindex_t ifindex
, uint8_t num_labels
, const mpls_label_t
*labels
,
117 static int nhlfe_del(struct zebra_nhlfe
*nhlfe
);
118 static void nhlfe_free(struct zebra_nhlfe
*nhlfe
);
119 static void nhlfe_out_label_update(struct zebra_nhlfe
*nhlfe
,
120 struct mpls_label_stack
*nh_label
);
121 static int mpls_lsp_uninstall_all(struct hash
*lsp_table
, struct zebra_lsp
*lsp
,
122 enum lsp_types_t type
);
123 static int mpls_static_lsp_uninstall_all(struct zebra_vrf
*zvrf
,
124 mpls_label_t in_label
);
125 static void nhlfe_print(struct zebra_nhlfe
*nhlfe
, struct vty
*vty
,
127 static void lsp_print(struct vty
*vty
, struct zebra_lsp
*lsp
);
128 static void mpls_lsp_uninstall_all_type(struct hash_bucket
*bucket
, void *ctxt
);
129 static void mpls_ftn_uninstall_all(struct zebra_vrf
*zvrf
,
130 int afi
, enum lsp_types_t lsp_type
);
131 static int lsp_znh_install(struct zebra_lsp
*lsp
, enum lsp_types_t type
,
132 const struct zapi_nexthop
*znh
);
133 static int lsp_backup_znh_install(struct zebra_lsp
*lsp
, enum lsp_types_t type
,
134 const struct zapi_nexthop
*znh
);
136 /* Static functions */
139 * Handle failure in LSP install, clear flags for NHLFE.
141 static void clear_nhlfe_installed(struct zebra_lsp
*lsp
)
143 struct zebra_nhlfe
*nhlfe
;
144 struct nexthop
*nexthop
;
146 frr_each_safe(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
147 nexthop
= nhlfe
->nexthop
;
151 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
);
152 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
155 frr_each_safe(nhlfe_list
, &lsp
->backup_nhlfe_list
, nhlfe
) {
156 nexthop
= nhlfe
->nexthop
;
160 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
);
161 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
166 * Install label forwarding entry based on labeled-route entry.
168 static int lsp_install(struct zebra_vrf
*zvrf
, mpls_label_t label
,
169 struct route_node
*rn
, struct route_entry
*re
)
171 struct hash
*lsp_table
;
172 struct zebra_ile tmp_ile
;
173 struct zebra_lsp
*lsp
;
174 struct zebra_nhlfe
*nhlfe
;
175 struct nexthop
*nexthop
;
176 enum lsp_types_t lsp_type
;
181 lsp_table
= zvrf
->lsp_table
;
185 lsp_type
= lsp_type_from_re_type(re
->type
);
188 /* Locate or allocate LSP entry. */
189 tmp_ile
.in_label
= label
;
190 lsp
= hash_get(lsp_table
, &tmp_ile
, lsp_alloc
);
192 /* For each active nexthop, create NHLFE. Note that we deliberately skip
193 * recursive nexthops right now, because intermediate hops won't
195 * the label advertised by the recursive nexthop (plus we don't have the
196 * logic yet to push multiple labels).
198 for (nexthop
= re
->nhe
->nhg
.nexthop
;
199 nexthop
; nexthop
= nexthop
->next
) {
200 /* Skip inactive and recursive entries. */
201 if (!CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
))
203 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_RECURSIVE
))
206 nhlfe
= nhlfe_find(&lsp
->nhlfe_list
, lsp_type
,
207 nexthop
->type
, &nexthop
->gate
,
210 /* Clear deleted flag (in case it was set) */
211 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
);
212 if (nexthop_labels_match(nhlfe
->nexthop
, nexthop
))
217 if (IS_ZEBRA_DEBUG_MPLS
) {
218 nhlfe2str(nhlfe
, buf
, BUFSIZ
);
220 "LSP in-label %u type %d nexthop %s out-label changed",
221 lsp
->ile
.in_label
, lsp_type
, buf
);
224 /* Update out label, trigger processing. */
225 nhlfe_out_label_update(nhlfe
, nexthop
->nh_label
);
226 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_CHANGED
);
229 /* Add LSP entry to this nexthop */
230 nhlfe
= nhlfe_add(lsp
, lsp_type
, nexthop
->type
,
231 &nexthop
->gate
, nexthop
->ifindex
,
232 nexthop
->nh_label
->num_labels
,
233 nexthop
->nh_label
->label
,
238 if (IS_ZEBRA_DEBUG_MPLS
) {
239 nhlfe2str(nhlfe
, buf
, BUFSIZ
);
241 "Add LSP in-label %u type %d nexthop %s out-label %u",
242 lsp
->ile
.in_label
, lsp_type
, buf
,
243 nexthop
->nh_label
->label
[0]);
246 lsp
->addr_family
= NHLFE_FAMILY(nhlfe
);
248 /* Mark NHLFE as changed. */
249 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_CHANGED
);
254 /* Queue LSP for processing if necessary. If no NHLFE got added (special
255 * case), delete the LSP entry; this case results in somewhat ugly
258 if (added
|| changed
) {
259 if (lsp_processq_add(lsp
))
262 lsp_check_free(lsp_table
, &lsp
);
269 * Uninstall all non-static NHLFEs of a label forwarding entry. If all
270 * NHLFEs are removed, the entire entry is deleted.
272 static int lsp_uninstall(struct zebra_vrf
*zvrf
, mpls_label_t label
)
274 struct hash
*lsp_table
;
275 struct zebra_ile tmp_ile
;
276 struct zebra_lsp
*lsp
;
277 struct zebra_nhlfe
*nhlfe
;
281 lsp_table
= zvrf
->lsp_table
;
285 /* If entry is not present, exit. */
286 tmp_ile
.in_label
= label
;
287 lsp
= hash_lookup(lsp_table
, &tmp_ile
);
288 if (!lsp
|| (nhlfe_list_first(&lsp
->nhlfe_list
) == NULL
))
291 /* Mark NHLFEs for delete or directly delete, as appropriate. */
292 frr_each_safe(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
294 /* Skip static NHLFEs */
295 if (nhlfe
->type
== ZEBRA_LSP_STATIC
)
298 if (IS_ZEBRA_DEBUG_MPLS
) {
299 nhlfe2str(nhlfe
, buf
, BUFSIZ
);
301 "Del LSP in-label %u type %d nexthop %s flags 0x%x",
302 label
, nhlfe
->type
, buf
, nhlfe
->flags
);
305 if (CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_SELECTED
)) {
306 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_CHANGED
);
307 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
);
313 /* Queue LSP for processing, if needed, else delete. */
314 if (CHECK_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
)) {
315 if (lsp_processq_add(lsp
))
318 lsp_check_free(lsp_table
, &lsp
);
325 * This function is invoked upon change to label block configuration; it
326 * will walk all registered FECs with label-index and appropriately update
327 * their local labels and trigger client updates.
329 static void fec_evaluate(struct zebra_vrf
*zvrf
)
331 struct route_node
*rn
;
332 struct zebra_fec
*fec
;
333 uint32_t old_label
, new_label
;
336 for (af
= AFI_IP
; af
< AFI_MAX
; af
++) {
337 if (zvrf
->fec_table
[af
] == NULL
)
340 for (rn
= route_top(zvrf
->fec_table
[af
]); rn
;
341 rn
= route_next(rn
)) {
342 if ((fec
= rn
->info
) == NULL
)
345 /* Skip configured FECs and those without a label index.
347 if (fec
->flags
& FEC_FLAG_CONFIGURED
348 || fec
->label_index
== MPLS_INVALID_LABEL_INDEX
)
351 /* Save old label, determine new label. */
352 old_label
= fec
->label
;
354 zvrf
->mpls_srgb
.start_label
+ fec
->label_index
;
355 if (new_label
>= zvrf
->mpls_srgb
.end_label
)
356 new_label
= MPLS_INVALID_LABEL
;
358 /* If label has changed, update FEC and clients. */
359 if (new_label
== old_label
)
362 if (IS_ZEBRA_DEBUG_MPLS
)
364 "Update fec %pRN new label %u upon label block",
367 fec
->label
= new_label
;
368 fec_update_clients(fec
);
370 /* Update label forwarding entries appropriately */
371 fec_change_update_lsp(zvrf
, fec
, old_label
);
377 * Derive (if possible) and update the local label for the FEC based on
378 * its label index. The index is "acceptable" if it falls within the
379 * globally configured label block (SRGB).
381 static uint32_t fec_derive_label_from_index(struct zebra_vrf
*zvrf
,
382 struct zebra_fec
*fec
)
386 if (fec
->label_index
!= MPLS_INVALID_LABEL_INDEX
387 && zvrf
->mpls_srgb
.start_label
388 && ((label
= zvrf
->mpls_srgb
.start_label
+ fec
->label_index
)
389 < zvrf
->mpls_srgb
.end_label
))
392 fec
->label
= MPLS_INVALID_LABEL
;
398 * There is a change for this FEC. Install or uninstall label forwarding
399 * entries, as appropriate.
401 static int fec_change_update_lsp(struct zebra_vrf
*zvrf
, struct zebra_fec
*fec
,
402 mpls_label_t old_label
)
404 struct route_table
*table
;
405 struct route_node
*rn
;
406 struct route_entry
*re
;
409 /* Uninstall label forwarding entry, if previously installed. */
410 if (old_label
!= MPLS_INVALID_LABEL
411 && old_label
!= MPLS_LABEL_IMPLICIT_NULL
)
412 lsp_uninstall(zvrf
, old_label
);
414 /* Install label forwarding entry corr. to new label, if needed. */
415 if (fec
->label
== MPLS_INVALID_LABEL
416 || fec
->label
== MPLS_LABEL_IMPLICIT_NULL
)
419 afi
= family2afi(PREFIX_FAMILY(&fec
->rn
->p
));
420 table
= zebra_vrf_table(afi
, SAFI_UNICAST
, zvrf_id(zvrf
));
424 /* See if labeled route exists. */
425 rn
= route_node_lookup(table
, &fec
->rn
->p
);
429 RNODE_FOREACH_RE (rn
, re
) {
430 if (CHECK_FLAG(re
->flags
, ZEBRA_FLAG_SELECTED
))
434 if (!re
|| !zebra_rib_labeled_unicast(re
))
437 if (lsp_install(zvrf
, fec
->label
, rn
, re
))
444 * Inform about FEC to a registered client.
446 static int fec_send(struct zebra_fec
*fec
, struct zserv
*client
)
449 struct route_node
*rn
;
453 /* Get output stream. */
454 s
= stream_new(ZEBRA_MAX_PACKET_SIZ
);
456 zclient_create_header(s
, ZEBRA_FEC_UPDATE
, VRF_DEFAULT
);
458 stream_putw(s
, rn
->p
.family
);
459 stream_put_prefix(s
, &rn
->p
);
460 stream_putl(s
, fec
->label
);
461 stream_putw_at(s
, 0, stream_get_endp(s
));
462 return zserv_send_message(client
, s
);
466 * Update all registered clients about this FEC. Caller should've updated
467 * FEC and ensure no duplicate updates.
469 static void fec_update_clients(struct zebra_fec
*fec
)
471 struct listnode
*node
;
472 struct zserv
*client
;
474 for (ALL_LIST_ELEMENTS_RO(fec
->client_list
, node
, client
)) {
475 if (IS_ZEBRA_DEBUG_MPLS
)
476 zlog_debug("Update client %s",
477 zebra_route_string(client
->proto
));
478 fec_send(fec
, client
);
484 * Print a FEC-label binding entry.
486 static void fec_print(struct zebra_fec
*fec
, struct vty
*vty
)
488 struct route_node
*rn
;
489 struct listnode
*node
;
490 struct zserv
*client
;
494 vty_out(vty
, "%pRN\n", rn
);
495 vty_out(vty
, " Label: %s", label2str(fec
->label
, buf
, BUFSIZ
));
496 if (fec
->label_index
!= MPLS_INVALID_LABEL_INDEX
)
497 vty_out(vty
, ", Label Index: %u", fec
->label_index
);
499 if (!list_isempty(fec
->client_list
)) {
500 vty_out(vty
, " Client list:");
501 for (ALL_LIST_ELEMENTS_RO(fec
->client_list
, node
, client
))
502 vty_out(vty
, " %s(fd %d)",
503 zebra_route_string(client
->proto
),
510 * Locate FEC-label binding that matches with passed info.
512 static struct zebra_fec
*fec_find(struct route_table
*table
, struct prefix
*p
)
514 struct route_node
*rn
;
517 rn
= route_node_lookup(table
, p
);
521 route_unlock_node(rn
);
526 * Add a FEC. This may be upon a client registering for a binding
527 * or when a binding is configured.
529 static struct zebra_fec
*fec_add(struct route_table
*table
, struct prefix
*p
,
530 mpls_label_t label
, uint32_t flags
,
531 uint32_t label_index
)
533 struct route_node
*rn
;
534 struct zebra_fec
*fec
;
538 /* Lookup (or add) route node.*/
539 rn
= route_node_get(table
, p
);
546 fec
= XCALLOC(MTYPE_FEC
, sizeof(struct zebra_fec
));
551 fec
->client_list
= list_new();
553 route_unlock_node(rn
); /* for the route_node_get */
555 fec
->label_index
= label_index
;
562 * Delete a FEC. This may be upon the last client deregistering for
563 * a FEC and no binding exists or when the binding is deleted and there
564 * are no registered clients.
566 static int fec_del(struct zebra_fec
*fec
)
568 list_delete(&fec
->client_list
);
569 fec
->rn
->info
= NULL
;
570 route_unlock_node(fec
->rn
);
571 XFREE(MTYPE_FEC
, fec
);
576 * Hash function for label.
578 static unsigned int label_hash(const void *p
)
580 const struct zebra_ile
*ile
= p
;
582 return (jhash_1word(ile
->in_label
, 0));
586 * Compare 2 LSP hash entries based on in-label.
588 static bool label_cmp(const void *p1
, const void *p2
)
590 const struct zebra_ile
*ile1
= p1
;
591 const struct zebra_ile
*ile2
= p2
;
593 return (ile1
->in_label
== ile2
->in_label
);
597 * Check if an IPv4 nexthop for a NHLFE is active. Update nexthop based on
599 * NOTE: Looking only for connected routes right now.
601 static int nhlfe_nexthop_active_ipv4(struct zebra_nhlfe
*nhlfe
,
602 struct nexthop
*nexthop
)
604 struct route_table
*table
;
605 struct prefix_ipv4 p
;
606 struct route_node
*rn
;
607 struct route_entry
*match
;
608 struct nexthop
*match_nh
;
610 table
= zebra_vrf_table(AFI_IP
, SAFI_UNICAST
, nexthop
->vrf_id
);
614 /* Lookup nexthop in IPv4 routing table. */
615 memset(&p
, 0, sizeof(p
));
617 p
.prefixlen
= IPV4_MAX_BITLEN
;
618 p
.prefix
= nexthop
->gate
.ipv4
;
620 rn
= route_node_match(table
, (struct prefix
*)&p
);
624 route_unlock_node(rn
);
626 /* Locate a valid connected route. */
627 RNODE_FOREACH_RE (rn
, match
) {
628 if (CHECK_FLAG(match
->status
, ROUTE_ENTRY_REMOVED
)
629 || !CHECK_FLAG(match
->flags
, ZEBRA_FLAG_SELECTED
))
632 for (match_nh
= match
->nhe
->nhg
.nexthop
; match_nh
;
633 match_nh
= match_nh
->next
) {
634 if (match
->type
== ZEBRA_ROUTE_CONNECT
635 || nexthop
->ifindex
== match_nh
->ifindex
) {
636 nexthop
->ifindex
= match_nh
->ifindex
;
647 * Check if an IPv6 nexthop for a NHLFE is active. Update nexthop based on
649 * NOTE: Looking only for connected routes right now.
651 static int nhlfe_nexthop_active_ipv6(struct zebra_nhlfe
*nhlfe
,
652 struct nexthop
*nexthop
)
654 struct route_table
*table
;
655 struct prefix_ipv6 p
;
656 struct route_node
*rn
;
657 struct route_entry
*match
;
659 table
= zebra_vrf_table(AFI_IP6
, SAFI_UNICAST
, nexthop
->vrf_id
);
663 /* Lookup nexthop in IPv6 routing table. */
664 memset(&p
, 0, sizeof(p
));
666 p
.prefixlen
= IPV6_MAX_BITLEN
;
667 p
.prefix
= nexthop
->gate
.ipv6
;
669 rn
= route_node_match(table
, (struct prefix
*)&p
);
673 route_unlock_node(rn
);
675 /* Locate a valid connected route. */
676 RNODE_FOREACH_RE (rn
, match
) {
677 if ((match
->type
== ZEBRA_ROUTE_CONNECT
)
678 && !CHECK_FLAG(match
->status
, ROUTE_ENTRY_REMOVED
)
679 && CHECK_FLAG(match
->flags
, ZEBRA_FLAG_SELECTED
))
683 if (!match
|| !match
->nhe
->nhg
.nexthop
)
686 nexthop
->ifindex
= match
->nhe
->nhg
.nexthop
->ifindex
;
692 * Check the nexthop reachability for a NHLFE and return if valid (reachable)
694 * NOTE: Each NHLFE points to only 1 nexthop.
696 static int nhlfe_nexthop_active(struct zebra_nhlfe
*nhlfe
)
698 struct nexthop
*nexthop
;
699 struct interface
*ifp
;
700 struct zebra_ns
*zns
;
702 nexthop
= nhlfe
->nexthop
;
703 if (!nexthop
) // unexpected
706 /* Check on nexthop based on type. */
707 switch (nexthop
->type
) {
708 case NEXTHOP_TYPE_IFINDEX
:
710 * Lookup if this type is special. The
711 * NEXTHOP_TYPE_IFINDEX is a pop and
712 * forward into a different table for
713 * processing. As such this ifindex
714 * passed to us may be a VRF device
715 * which will not be in the default
716 * VRF. So let's look in all of them
718 zns
= zebra_ns_lookup(NS_DEFAULT
);
719 ifp
= if_lookup_by_index_per_ns(zns
, nexthop
->ifindex
);
720 if (ifp
&& if_is_operative(ifp
))
721 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
723 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
725 case NEXTHOP_TYPE_IPV4
:
726 case NEXTHOP_TYPE_IPV4_IFINDEX
:
727 if (nhlfe_nexthop_active_ipv4(nhlfe
, nexthop
))
728 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
730 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
733 case NEXTHOP_TYPE_IPV6
:
734 if (nhlfe_nexthop_active_ipv6(nhlfe
, nexthop
))
735 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
737 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
740 case NEXTHOP_TYPE_IPV6_IFINDEX
:
741 if (IN6_IS_ADDR_LINKLOCAL(&nexthop
->gate
.ipv6
)) {
742 ifp
= if_lookup_by_index(nexthop
->ifindex
,
744 if (ifp
&& if_is_operative(ifp
))
745 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
747 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
749 if (nhlfe_nexthop_active_ipv6(nhlfe
, nexthop
))
750 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
752 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
756 case NEXTHOP_TYPE_BLACKHOLE
:
760 return CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
764 * Walk through NHLFEs for a LSP forwarding entry, verify nexthop
765 * reachability and select the best. Multipath entries are also
766 * marked. This is invoked when an LSP scheduled for processing (due
767 * to some change) is examined.
769 static void lsp_select_best_nhlfe(struct zebra_lsp
*lsp
)
771 struct zebra_nhlfe
*nhlfe
;
772 struct zebra_nhlfe
*best
;
773 struct nexthop
*nexthop
;
781 UNSET_FLAG(lsp
->flags
, LSP_FLAG_CHANGED
);
784 * First compute the best path, after checking nexthop status. We are
785 * only concerned with non-deleted NHLFEs.
787 frr_each_safe(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
788 /* Clear selection flags. */
789 UNSET_FLAG(nhlfe
->flags
,
790 (NHLFE_FLAG_SELECTED
| NHLFE_FLAG_MULTIPATH
));
792 if (!CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
)
793 && nhlfe_nexthop_active(nhlfe
)) {
794 if (!best
|| (nhlfe
->distance
< best
->distance
))
799 lsp
->best_nhlfe
= best
;
800 if (!lsp
->best_nhlfe
)
804 * Check the active status of backup nhlfes also
806 frr_each_safe(nhlfe_list
, &lsp
->backup_nhlfe_list
, nhlfe
) {
807 if (!CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
))
808 (void)nhlfe_nexthop_active(nhlfe
);
811 /* Mark best NHLFE as selected. */
812 SET_FLAG(lsp
->best_nhlfe
->flags
, NHLFE_FLAG_SELECTED
);
815 * If best path exists, see if there is ECMP. While doing this, note if
817 * new (uninstalled) NHLFE has been selected, an installed entry that is
818 * still selected has a change or an installed entry is to be removed.
820 frr_each(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
821 int nh_chg
, nh_sel
, nh_inst
;
823 nexthop
= nhlfe
->nexthop
;
824 if (!nexthop
) // unexpected
827 if (!CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
)
828 && CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
)
829 && (nhlfe
->distance
== lsp
->best_nhlfe
->distance
)) {
830 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_SELECTED
);
831 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_MULTIPATH
);
835 if (CHECK_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
) && !changed
) {
836 nh_chg
= CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_CHANGED
);
837 nh_sel
= CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_SELECTED
);
839 CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
);
841 if ((nh_sel
&& !nh_inst
)
842 || (nh_sel
&& nh_inst
&& nh_chg
)
843 || (nh_inst
&& !nh_sel
))
847 /* We have finished examining, clear changed flag. */
848 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_CHANGED
);
852 SET_FLAG(lsp
->flags
, LSP_FLAG_CHANGED
);
856 * Delete LSP forwarding entry from kernel, if installed. Called upon
859 static void lsp_uninstall_from_kernel(struct hash_bucket
*bucket
, void *ctxt
)
861 struct zebra_lsp
*lsp
;
863 lsp
= (struct zebra_lsp
*)bucket
->data
;
864 if (CHECK_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
))
865 (void)dplane_lsp_delete(lsp
);
869 * Schedule LSP forwarding entry for processing. Called upon changes
870 * that may impact LSPs such as nexthop / connected route changes.
872 static void lsp_schedule(struct hash_bucket
*bucket
, void *ctxt
)
874 struct zebra_lsp
*lsp
;
876 lsp
= (struct zebra_lsp
*)bucket
->data
;
878 /* In the common flow, this is used when external events occur. For
879 * LSPs with backup nhlfes, we'll assume that the forwarding
880 * plane will use the backups to handle these events, until the
881 * owning protocol can react.
884 /* Skip LSPs with backups */
885 if (nhlfe_list_first(&lsp
->backup_nhlfe_list
) != NULL
) {
886 if (IS_ZEBRA_DEBUG_MPLS_DETAIL
)
887 zlog_debug("%s: skip LSP in-label %u",
888 __func__
, lsp
->ile
.in_label
);
893 (void)lsp_processq_add(lsp
);
897 * Process a LSP entry that is in the queue. Recalculate best NHLFE and
898 * any multipaths and update or delete from the kernel, as needed.
900 static wq_item_status
lsp_process(struct work_queue
*wq
, void *data
)
902 struct zebra_lsp
*lsp
;
903 struct zebra_nhlfe
*oldbest
, *newbest
;
904 char buf
[BUFSIZ
], buf2
[BUFSIZ
];
905 struct zebra_vrf
*zvrf
= vrf_info_lookup(VRF_DEFAULT
);
906 enum zebra_dplane_result res
;
908 lsp
= (struct zebra_lsp
*)data
;
909 if (!lsp
) // unexpected
912 oldbest
= lsp
->best_nhlfe
;
914 /* Select best NHLFE(s) */
915 lsp_select_best_nhlfe(lsp
);
917 newbest
= lsp
->best_nhlfe
;
919 if (IS_ZEBRA_DEBUG_MPLS
) {
921 nhlfe2str(oldbest
, buf
, sizeof(buf
));
923 nhlfe2str(newbest
, buf2
, sizeof(buf2
));
925 "Process LSP in-label %u oldbest %s newbest %s flags 0x%x ecmp# %d",
926 lsp
->ile
.in_label
, oldbest
? buf
: "NULL",
927 newbest
? buf2
: "NULL", lsp
->flags
, lsp
->num_ecmp
);
930 if (!CHECK_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
)) {
931 /* Not already installed */
934 UNSET_FLAG(lsp
->flags
, LSP_FLAG_CHANGED
);
936 switch (dplane_lsp_add(lsp
)) {
937 case ZEBRA_DPLANE_REQUEST_QUEUED
:
938 /* Set 'installed' flag so we will know
939 * that an install is in-flight.
941 SET_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
);
943 zvrf
->lsp_installs_queued
++;
945 case ZEBRA_DPLANE_REQUEST_FAILURE
:
946 flog_warn(EC_ZEBRA_LSP_INSTALL_FAILURE
,
947 "LSP Install Failure: %u",
950 case ZEBRA_DPLANE_REQUEST_SUCCESS
:
951 zvrf
->lsp_installs
++;
956 /* Installed, may need an update and/or delete. */
958 res
= dplane_lsp_delete(lsp
);
960 /* We do some of the lsp cleanup immediately for
963 UNSET_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
);
964 clear_nhlfe_installed(lsp
);
967 case ZEBRA_DPLANE_REQUEST_QUEUED
:
968 zvrf
->lsp_removals_queued
++;
970 case ZEBRA_DPLANE_REQUEST_FAILURE
:
971 flog_warn(EC_ZEBRA_LSP_DELETE_FAILURE
,
972 "LSP Deletion Failure: %u",
975 case ZEBRA_DPLANE_REQUEST_SUCCESS
:
976 zvrf
->lsp_removals
++;
979 } else if (CHECK_FLAG(lsp
->flags
, LSP_FLAG_CHANGED
)) {
980 struct zebra_nhlfe
*nhlfe
;
981 struct nexthop
*nexthop
;
983 UNSET_FLAG(lsp
->flags
, LSP_FLAG_CHANGED
);
985 /* We leave the INSTALLED flag set here
986 * so we know an update is in-flight.
990 * Any NHLFE that was installed but is not
991 * selected now needs to have its flags updated.
993 frr_each_safe(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
994 nexthop
= nhlfe
->nexthop
;
998 if (CHECK_FLAG(nhlfe
->flags
,
999 NHLFE_FLAG_INSTALLED
)
1000 && !CHECK_FLAG(nhlfe
->flags
,
1001 NHLFE_FLAG_SELECTED
)) {
1002 UNSET_FLAG(nhlfe
->flags
,
1003 NHLFE_FLAG_INSTALLED
);
1004 UNSET_FLAG(nexthop
->flags
,
1009 switch (dplane_lsp_update(lsp
)) {
1010 case ZEBRA_DPLANE_REQUEST_QUEUED
:
1011 zvrf
->lsp_installs_queued
++;
1013 case ZEBRA_DPLANE_REQUEST_FAILURE
:
1014 flog_warn(EC_ZEBRA_LSP_INSTALL_FAILURE
,
1015 "LSP Update Failure: %u",
1018 case ZEBRA_DPLANE_REQUEST_SUCCESS
:
1019 zvrf
->lsp_installs
++;
1030 * Callback upon processing completion of a LSP forwarding entry.
1032 static void lsp_processq_del(struct work_queue
*wq
, void *data
)
1034 struct zebra_vrf
*zvrf
;
1035 struct zebra_lsp
*lsp
;
1036 struct hash
*lsp_table
;
1037 struct zebra_nhlfe
*nhlfe
;
1038 bool in_shutdown
= false;
1040 /* If zebra is shutting down, don't delete any structs,
1041 * just ignore this callback. The LSPs will be cleaned up
1042 * during the shutdown processing.
1044 in_shutdown
= atomic_load_explicit(&zrouter
.in_shutdown
,
1045 memory_order_relaxed
);
1049 zvrf
= vrf_info_lookup(VRF_DEFAULT
);
1052 lsp_table
= zvrf
->lsp_table
;
1053 if (!lsp_table
) // unexpected
1056 lsp
= (struct zebra_lsp
*)data
;
1057 if (!lsp
) // unexpected
1060 /* Clear flag, remove any NHLFEs marked for deletion. If no NHLFEs
1062 * delete LSP entry also.
1064 UNSET_FLAG(lsp
->flags
, LSP_FLAG_SCHEDULED
);
1066 frr_each_safe(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
1067 if (CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
))
1071 frr_each_safe(nhlfe_list
, &lsp
->backup_nhlfe_list
, nhlfe
) {
1072 if (CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
))
1076 lsp_check_free(lsp_table
, &lsp
);
1080 * Callback upon finishing the processing of all scheduled
1081 * LSP forwarding entries.
1083 static void lsp_processq_complete(struct work_queue
*wq
)
1085 /* Nothing to do for now. */
1089 * Add LSP forwarding entry to queue for subsequent processing.
1091 static int lsp_processq_add(struct zebra_lsp
*lsp
)
1093 /* If already scheduled, exit. */
1094 if (CHECK_FLAG(lsp
->flags
, LSP_FLAG_SCHEDULED
))
1097 if (zrouter
.lsp_process_q
== NULL
) {
1098 flog_err(EC_ZEBRA_WQ_NONEXISTENT
,
1099 "%s: work_queue does not exist!", __func__
);
1103 work_queue_add(zrouter
.lsp_process_q
, lsp
);
1104 SET_FLAG(lsp
->flags
, LSP_FLAG_SCHEDULED
);
1109 * Callback to allocate LSP forwarding table entry.
1111 static void *lsp_alloc(void *p
)
1113 const struct zebra_ile
*ile
= p
;
1114 struct zebra_lsp
*lsp
;
1116 lsp
= XCALLOC(MTYPE_LSP
, sizeof(struct zebra_lsp
));
1118 nhlfe_list_init(&lsp
->nhlfe_list
);
1119 nhlfe_list_init(&lsp
->backup_nhlfe_list
);
1121 if (IS_ZEBRA_DEBUG_MPLS
)
1122 zlog_debug("Alloc LSP in-label %u", lsp
->ile
.in_label
);
1124 return ((void *)lsp
);
1128 * Check whether lsp can be freed - no nhlfes, e.g., and call free api
1130 static void lsp_check_free(struct hash
*lsp_table
, struct zebra_lsp
**plsp
)
1132 struct zebra_lsp
*lsp
;
1134 if (plsp
== NULL
|| *plsp
== NULL
)
1139 if ((nhlfe_list_first(&lsp
->nhlfe_list
) == NULL
) &&
1140 (nhlfe_list_first(&lsp
->backup_nhlfe_list
) == NULL
) &&
1141 !CHECK_FLAG(lsp
->flags
, LSP_FLAG_SCHEDULED
))
1142 lsp_free(lsp_table
, plsp
);
1145 static void lsp_free_nhlfe(struct zebra_lsp
*lsp
)
1147 struct zebra_nhlfe
*nhlfe
;
1149 while ((nhlfe
= nhlfe_list_first(&lsp
->nhlfe_list
))) {
1150 nhlfe_list_del(&lsp
->nhlfe_list
, nhlfe
);
1154 while ((nhlfe
= nhlfe_list_first(&lsp
->backup_nhlfe_list
))) {
1155 nhlfe_list_del(&lsp
->backup_nhlfe_list
, nhlfe
);
1161 * Dtor for an LSP: remove from ile hash, release any internal allocations,
1164 static void lsp_free(struct hash
*lsp_table
, struct zebra_lsp
**plsp
)
1166 struct zebra_lsp
*lsp
;
1168 if (plsp
== NULL
|| *plsp
== NULL
)
1173 if (IS_ZEBRA_DEBUG_MPLS
)
1174 zlog_debug("Free LSP in-label %u flags 0x%x",
1175 lsp
->ile
.in_label
, lsp
->flags
);
1177 lsp_free_nhlfe(lsp
);
1179 hash_release(lsp_table
, &lsp
->ile
);
1180 XFREE(MTYPE_LSP
, lsp
);
1186 * Create printable string for NHLFE entry.
1188 static char *nhlfe2str(const struct zebra_nhlfe
*nhlfe
, char *buf
, int size
)
1190 const struct nexthop
*nexthop
;
1193 nexthop
= nhlfe
->nexthop
;
1194 switch (nexthop
->type
) {
1195 case NEXTHOP_TYPE_IPV4
:
1196 case NEXTHOP_TYPE_IPV4_IFINDEX
:
1197 inet_ntop(AF_INET
, &nexthop
->gate
.ipv4
, buf
, size
);
1199 case NEXTHOP_TYPE_IPV6
:
1200 case NEXTHOP_TYPE_IPV6_IFINDEX
:
1201 inet_ntop(AF_INET6
, &nexthop
->gate
.ipv6
, buf
, size
);
1203 case NEXTHOP_TYPE_IFINDEX
:
1204 snprintf(buf
, size
, "Ifindex: %u", nexthop
->ifindex
);
1205 case NEXTHOP_TYPE_BLACKHOLE
:
1213 * Check if NHLFE matches with search info passed.
1215 static int nhlfe_nhop_match(struct zebra_nhlfe
*nhlfe
,
1216 enum nexthop_types_t gtype
,
1217 const union g_addr
*gate
, ifindex_t ifindex
)
1219 struct nexthop
*nhop
;
1222 nhop
= nhlfe
->nexthop
;
1226 if (nhop
->type
!= gtype
)
1229 switch (nhop
->type
) {
1230 case NEXTHOP_TYPE_IPV4
:
1231 case NEXTHOP_TYPE_IPV4_IFINDEX
:
1232 cmp
= memcmp(&(nhop
->gate
.ipv4
), &(gate
->ipv4
),
1233 sizeof(struct in_addr
));
1234 if (!cmp
&& nhop
->type
== NEXTHOP_TYPE_IPV4_IFINDEX
)
1235 cmp
= !(nhop
->ifindex
== ifindex
);
1237 case NEXTHOP_TYPE_IPV6
:
1238 case NEXTHOP_TYPE_IPV6_IFINDEX
:
1239 cmp
= memcmp(&(nhop
->gate
.ipv6
), &(gate
->ipv6
),
1240 sizeof(struct in6_addr
));
1241 if (!cmp
&& nhop
->type
== NEXTHOP_TYPE_IPV6_IFINDEX
)
1242 cmp
= !(nhop
->ifindex
== ifindex
);
1244 case NEXTHOP_TYPE_IFINDEX
:
1245 cmp
= !(nhop
->ifindex
== ifindex
);
1247 case NEXTHOP_TYPE_BLACKHOLE
:
1256 * Locate NHLFE that matches with passed info.
1258 static struct zebra_nhlfe
*nhlfe_find(struct nhlfe_list_head
*list
,
1259 enum lsp_types_t lsp_type
,
1260 enum nexthop_types_t gtype
,
1261 const union g_addr
*gate
,
1264 struct zebra_nhlfe
*nhlfe
;
1266 frr_each_safe(nhlfe_list
, list
, nhlfe
) {
1267 if (nhlfe
->type
!= lsp_type
)
1269 if (!nhlfe_nhop_match(nhlfe
, gtype
, gate
, ifindex
))
1277 * Allocate and init new NHLFE.
1279 static struct zebra_nhlfe
*
1280 nhlfe_alloc(struct zebra_lsp
*lsp
, enum lsp_types_t lsp_type
,
1281 enum nexthop_types_t gtype
, const union g_addr
*gate
,
1282 ifindex_t ifindex
, uint8_t num_labels
, const mpls_label_t
*labels
)
1284 struct zebra_nhlfe
*nhlfe
;
1285 struct nexthop
*nexthop
;
1289 nhlfe
= XCALLOC(MTYPE_NHLFE
, sizeof(struct zebra_nhlfe
));
1292 nhlfe
->type
= lsp_type
;
1293 nhlfe
->distance
= lsp_distance(lsp_type
);
1295 nexthop
= nexthop_new();
1297 nexthop_add_labels(nexthop
, lsp_type
, num_labels
, labels
);
1299 nexthop
->vrf_id
= VRF_DEFAULT
;
1300 nexthop
->type
= gtype
;
1301 switch (nexthop
->type
) {
1302 case NEXTHOP_TYPE_IPV4
:
1303 case NEXTHOP_TYPE_IPV4_IFINDEX
:
1304 nexthop
->gate
.ipv4
= gate
->ipv4
;
1306 nexthop
->ifindex
= ifindex
;
1308 case NEXTHOP_TYPE_IPV6
:
1309 case NEXTHOP_TYPE_IPV6_IFINDEX
:
1310 nexthop
->gate
.ipv6
= gate
->ipv6
;
1312 nexthop
->ifindex
= ifindex
;
1314 case NEXTHOP_TYPE_IFINDEX
:
1315 nexthop
->ifindex
= ifindex
;
1317 case NEXTHOP_TYPE_BLACKHOLE
:
1318 if (IS_ZEBRA_DEBUG_MPLS
)
1319 zlog_debug("%s: invalid: blackhole nexthop", __func__
);
1321 nexthop_free(nexthop
);
1322 XFREE(MTYPE_NHLFE
, nhlfe
);
1325 nhlfe
->nexthop
= nexthop
;
1331 * Add primary or backup NHLFE. Base entry must have been created and
1332 * duplicate check done.
1334 static struct zebra_nhlfe
*nhlfe_add(struct zebra_lsp
*lsp
,
1335 enum lsp_types_t lsp_type
,
1336 enum nexthop_types_t gtype
,
1337 const union g_addr
*gate
,
1338 ifindex_t ifindex
, uint8_t num_labels
,
1339 const mpls_label_t
*labels
, bool is_backup
)
1341 struct zebra_nhlfe
*nhlfe
;
1346 /* Must have labels */
1347 if (num_labels
== 0 || labels
== NULL
) {
1348 if (IS_ZEBRA_DEBUG_MPLS
)
1349 zlog_debug("%s: invalid nexthop: no labels", __func__
);
1354 /* Allocate new object */
1355 nhlfe
= nhlfe_alloc(lsp
, lsp_type
, gtype
, gate
, ifindex
, num_labels
,
1361 /* Enqueue to LSP: primaries at head of list, backups at tail */
1363 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_IS_BACKUP
);
1364 nhlfe_list_add_tail(&lsp
->backup_nhlfe_list
, nhlfe
);
1366 nhlfe_list_add_head(&lsp
->nhlfe_list
, nhlfe
);
1372 * Common delete for NHLFEs.
1374 static void nhlfe_free(struct zebra_nhlfe
*nhlfe
)
1381 nexthop_free(nhlfe
->nexthop
);
1383 nhlfe
->nexthop
= NULL
;
1385 XFREE(MTYPE_NHLFE
, nhlfe
);
1390 * Disconnect NHLFE from LSP, and free. Entry must be present on LSP's list.
1392 static int nhlfe_del(struct zebra_nhlfe
*nhlfe
)
1394 struct zebra_lsp
*lsp
;
1403 if (nhlfe
== lsp
->best_nhlfe
)
1404 lsp
->best_nhlfe
= NULL
;
1406 /* Unlink from LSP */
1407 if (CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_IS_BACKUP
))
1408 nhlfe_list_del(&lsp
->backup_nhlfe_list
, nhlfe
);
1410 nhlfe_list_del(&lsp
->nhlfe_list
, nhlfe
);
1420 * Update label for NHLFE entry.
1422 static void nhlfe_out_label_update(struct zebra_nhlfe
*nhlfe
,
1423 struct mpls_label_stack
*nh_label
)
1425 nhlfe
->nexthop
->nh_label
->label
[0] = nh_label
->label
[0];
1428 static int mpls_lsp_uninstall_all(struct hash
*lsp_table
, struct zebra_lsp
*lsp
,
1429 enum lsp_types_t type
)
1431 struct zebra_nhlfe
*nhlfe
;
1432 int schedule_lsp
= 0;
1435 if (CHECK_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
))
1438 /* Mark NHLFEs for delete or directly delete, as appropriate. */
1439 frr_each_safe(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
1440 /* Skip non-static NHLFEs */
1441 if (nhlfe
->type
!= type
)
1444 if (IS_ZEBRA_DEBUG_MPLS
) {
1445 nhlfe2str(nhlfe
, buf
, sizeof(buf
));
1447 "Del LSP in-label %u type %d nexthop %s flags 0x%x",
1448 lsp
->ile
.in_label
, type
, buf
, nhlfe
->flags
);
1451 if (CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
)) {
1452 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_CHANGED
);
1453 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
);
1460 frr_each_safe(nhlfe_list
, &lsp
->backup_nhlfe_list
, nhlfe
) {
1461 /* Skip non-static NHLFEs */
1462 if (nhlfe
->type
!= type
)
1465 if (IS_ZEBRA_DEBUG_MPLS
) {
1466 nhlfe2str(nhlfe
, buf
, sizeof(buf
));
1468 "Del backup LSP in-label %u type %d nexthop %s flags 0x%x",
1469 lsp
->ile
.in_label
, type
, buf
, nhlfe
->flags
);
1472 if (CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
)) {
1473 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_CHANGED
);
1474 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
);
1481 /* Queue LSP for processing, if needed, else delete. */
1483 if (IS_ZEBRA_DEBUG_MPLS
) {
1484 zlog_debug("Schedule LSP in-label %u flags 0x%x",
1485 lsp
->ile
.in_label
, lsp
->flags
);
1487 if (lsp_processq_add(lsp
))
1490 lsp_check_free(lsp_table
, &lsp
);
1497 * Uninstall all static NHLFEs for a particular LSP forwarding entry.
1498 * If no other NHLFEs exist, the entry would be deleted.
1500 static int mpls_static_lsp_uninstall_all(struct zebra_vrf
*zvrf
,
1501 mpls_label_t in_label
)
1503 struct hash
*lsp_table
;
1504 struct zebra_ile tmp_ile
;
1505 struct zebra_lsp
*lsp
;
1508 lsp_table
= zvrf
->lsp_table
;
1512 /* If entry is not present, exit. */
1513 tmp_ile
.in_label
= in_label
;
1514 lsp
= hash_lookup(lsp_table
, &tmp_ile
);
1515 if (!lsp
|| (nhlfe_list_first(&lsp
->nhlfe_list
) == NULL
))
1518 return mpls_lsp_uninstall_all(lsp_table
, lsp
, ZEBRA_LSP_STATIC
);
1521 static json_object
*nhlfe_json(struct zebra_nhlfe
*nhlfe
)
1523 json_object
*json_nhlfe
= NULL
;
1524 json_object
*json_backups
= NULL
;
1525 json_object
*json_label_stack
;
1526 struct nexthop
*nexthop
= nhlfe
->nexthop
;
1529 json_nhlfe
= json_object_new_object();
1530 json_object_string_add(json_nhlfe
, "type", nhlfe_type2str(nhlfe
->type
));
1531 json_object_int_add(json_nhlfe
, "outLabel",
1532 nexthop
->nh_label
->label
[0]);
1534 json_label_stack
= json_object_new_array();
1535 json_object_object_add(json_nhlfe
, "outLabelStack", json_label_stack
);
1536 for (i
= 0; i
< nexthop
->nh_label
->num_labels
; i
++)
1537 json_object_array_add(
1539 json_object_new_int(nexthop
->nh_label
->label
[i
]));
1541 json_object_int_add(json_nhlfe
, "distance", nhlfe
->distance
);
1543 if (CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
))
1544 json_object_boolean_true_add(json_nhlfe
, "installed");
1546 switch (nexthop
->type
) {
1547 case NEXTHOP_TYPE_IPV4
:
1548 case NEXTHOP_TYPE_IPV4_IFINDEX
:
1549 json_object_string_addf(json_nhlfe
, "nexthop", "%pI4",
1550 &nexthop
->gate
.ipv4
);
1552 case NEXTHOP_TYPE_IPV6
:
1553 case NEXTHOP_TYPE_IPV6_IFINDEX
:
1554 json_object_string_addf(json_nhlfe
, "nexthop", "%pI6",
1555 &nexthop
->gate
.ipv6
);
1557 if (nexthop
->ifindex
)
1558 json_object_string_add(json_nhlfe
, "interface",
1559 ifindex2ifname(nexthop
->ifindex
,
1562 case NEXTHOP_TYPE_IFINDEX
:
1563 if (nexthop
->ifindex
)
1564 json_object_string_add(json_nhlfe
, "interface",
1565 ifindex2ifname(nexthop
->ifindex
,
1568 case NEXTHOP_TYPE_BLACKHOLE
:
1572 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_HAS_BACKUP
)) {
1573 json_backups
= json_object_new_array();
1574 for (i
= 0; i
< nexthop
->backup_num
; i
++) {
1575 json_object_array_add(
1577 json_object_new_int(nexthop
->backup_idx
[i
]));
1580 json_object_object_add(json_nhlfe
, "backupIndex",
1588 * Print the NHLFE for a LSP forwarding entry.
1590 static void nhlfe_print(struct zebra_nhlfe
*nhlfe
, struct vty
*vty
,
1593 struct nexthop
*nexthop
;
1594 char buf
[MPLS_LABEL_STRLEN
];
1596 nexthop
= nhlfe
->nexthop
;
1597 if (!nexthop
|| !nexthop
->nh_label
) // unexpected
1600 vty_out(vty
, " type: %s remote label: %s distance: %d\n",
1601 nhlfe_type2str(nhlfe
->type
),
1602 mpls_label2str(nexthop
->nh_label
->num_labels
,
1603 nexthop
->nh_label
->label
,
1604 buf
, sizeof(buf
), 0),
1608 vty_out(vty
, "%s", indent
);
1610 switch (nexthop
->type
) {
1611 case NEXTHOP_TYPE_IPV4
:
1612 case NEXTHOP_TYPE_IPV4_IFINDEX
:
1613 vty_out(vty
, " via %pI4", &nexthop
->gate
.ipv4
);
1614 if (nexthop
->ifindex
)
1615 vty_out(vty
, " dev %s",
1616 ifindex2ifname(nexthop
->ifindex
,
1619 case NEXTHOP_TYPE_IPV6
:
1620 case NEXTHOP_TYPE_IPV6_IFINDEX
:
1621 vty_out(vty
, " via %s",
1622 inet_ntop(AF_INET6
, &nexthop
->gate
.ipv6
, buf
,
1624 if (nexthop
->ifindex
)
1625 vty_out(vty
, " dev %s",
1626 ifindex2ifname(nexthop
->ifindex
,
1629 case NEXTHOP_TYPE_IFINDEX
:
1630 if (nexthop
->ifindex
)
1631 vty_out(vty
, " dev %s",
1632 ifindex2ifname(nexthop
->ifindex
,
1635 case NEXTHOP_TYPE_BLACKHOLE
:
1639 CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_IS_BACKUP
) ? " (backup)"
1642 CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
) ? " (installed)"
1648 * Print an LSP forwarding entry.
1650 static void lsp_print(struct vty
*vty
, struct zebra_lsp
*lsp
)
1652 struct zebra_nhlfe
*nhlfe
, *backup
;
1655 vty_out(vty
, "Local label: %u%s\n", lsp
->ile
.in_label
,
1656 CHECK_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
) ? " (installed)"
1659 frr_each(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
1660 nhlfe_print(nhlfe
, vty
, NULL
);
1662 if (nhlfe
->nexthop
== NULL
||
1663 !CHECK_FLAG(nhlfe
->nexthop
->flags
,
1664 NEXTHOP_FLAG_HAS_BACKUP
))
1667 /* Backup nhlfes: find backups in backup list */
1669 for (j
= 0; j
< nhlfe
->nexthop
->backup_num
; j
++) {
1672 frr_each(nhlfe_list
, &lsp
->backup_nhlfe_list
, backup
) {
1673 if (i
== nhlfe
->nexthop
->backup_idx
[j
])
1679 vty_out(vty
, " [backup %d]", i
);
1680 nhlfe_print(backup
, vty
, " ");
1687 * JSON objects for an LSP forwarding entry.
1689 static json_object
*lsp_json(struct zebra_lsp
*lsp
)
1691 struct zebra_nhlfe
*nhlfe
= NULL
;
1692 json_object
*json
= json_object_new_object();
1693 json_object
*json_nhlfe_list
= json_object_new_array();
1695 json_object_int_add(json
, "inLabel", lsp
->ile
.in_label
);
1697 if (CHECK_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
))
1698 json_object_boolean_true_add(json
, "installed");
1700 frr_each(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
)
1701 json_object_array_add(json_nhlfe_list
, nhlfe_json(nhlfe
));
1703 json_object_object_add(json
, "nexthops", json_nhlfe_list
);
1704 json_nhlfe_list
= NULL
;
1707 frr_each(nhlfe_list
, &lsp
->backup_nhlfe_list
, nhlfe
) {
1708 if (json_nhlfe_list
== NULL
)
1709 json_nhlfe_list
= json_object_new_array();
1711 json_object_array_add(json_nhlfe_list
, nhlfe_json(nhlfe
));
1714 if (json_nhlfe_list
)
1715 json_object_object_add(json
, "backupNexthops", json_nhlfe_list
);
1721 /* Return a sorted linked list of the hash contents */
1722 static struct list
*hash_get_sorted_list(struct hash
*hash
, void *cmp
)
1725 struct hash_bucket
*hb
;
1726 struct list
*sorted_list
= list_new();
1728 sorted_list
->cmp
= (int (*)(void *, void *))cmp
;
1730 for (i
= 0; i
< hash
->size
; i
++)
1731 for (hb
= hash
->index
[i
]; hb
; hb
= hb
->next
)
1732 listnode_add_sort(sorted_list
, hb
->data
);
1738 * Compare two LSPs based on their label values.
1740 static int lsp_cmp(const struct zebra_lsp
*lsp1
, const struct zebra_lsp
*lsp2
)
1742 if (lsp1
->ile
.in_label
< lsp2
->ile
.in_label
)
1745 if (lsp1
->ile
.in_label
> lsp2
->ile
.in_label
)
1752 * Initialize work queue for processing changed LSPs.
1754 static int mpls_processq_init(void)
1756 zrouter
.lsp_process_q
= work_queue_new(zrouter
.master
, "LSP processing");
1757 if (!zrouter
.lsp_process_q
) {
1758 flog_err(EC_ZEBRA_WQ_NONEXISTENT
,
1759 "%s: could not initialise work queue!", __func__
);
1763 zrouter
.lsp_process_q
->spec
.workfunc
= &lsp_process
;
1764 zrouter
.lsp_process_q
->spec
.del_item_data
= &lsp_processq_del
;
1765 zrouter
.lsp_process_q
->spec
.errorfunc
= NULL
;
1766 zrouter
.lsp_process_q
->spec
.completion_func
= &lsp_processq_complete
;
1767 zrouter
.lsp_process_q
->spec
.max_retries
= 0;
1768 zrouter
.lsp_process_q
->spec
.hold
= 10;
1775 * Process LSP update results from zebra dataplane.
1777 void zebra_mpls_lsp_dplane_result(struct zebra_dplane_ctx
*ctx
)
1779 struct zebra_vrf
*zvrf
;
1781 struct zebra_ile tmp_ile
;
1782 struct hash
*lsp_table
;
1783 struct zebra_lsp
*lsp
;
1784 struct zebra_nhlfe
*nhlfe
;
1785 struct nexthop
*nexthop
;
1786 enum dplane_op_e op
;
1787 enum zebra_dplane_result status
;
1788 enum zebra_sr_policy_update_label_mode update_mode
;
1790 op
= dplane_ctx_get_op(ctx
);
1791 status
= dplane_ctx_get_status(ctx
);
1793 if (IS_ZEBRA_DEBUG_DPLANE_DETAIL
)
1794 zlog_debug("LSP dplane ctx %p, op %s, in-label %u, result %s",
1795 ctx
, dplane_op2str(op
),
1796 dplane_ctx_get_in_label(ctx
),
1797 dplane_res2str(status
));
1799 label
= dplane_ctx_get_in_label(ctx
);
1802 case DPLANE_OP_LSP_INSTALL
:
1803 case DPLANE_OP_LSP_UPDATE
:
1804 /* Look for zebra LSP object */
1805 zvrf
= vrf_info_lookup(VRF_DEFAULT
);
1809 lsp_table
= zvrf
->lsp_table
;
1811 tmp_ile
.in_label
= label
;
1812 lsp
= hash_lookup(lsp_table
, &tmp_ile
);
1814 if (IS_ZEBRA_DEBUG_DPLANE
)
1815 zlog_debug("LSP ctx %p: in-label %u not found",
1816 ctx
, dplane_ctx_get_in_label(ctx
));
1820 /* TODO -- Confirm that this result is still 'current' */
1822 if (status
!= ZEBRA_DPLANE_REQUEST_SUCCESS
) {
1823 UNSET_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
);
1824 clear_nhlfe_installed(lsp
);
1825 flog_warn(EC_ZEBRA_LSP_INSTALL_FAILURE
,
1826 "LSP Install Failure: in-label %u",
1831 /* Update zebra object */
1832 SET_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
);
1833 frr_each(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
1834 nexthop
= nhlfe
->nexthop
;
1838 if (CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_SELECTED
) &&
1839 CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
)) {
1840 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
);
1841 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
1845 update_mode
= (op
== DPLANE_OP_LSP_INSTALL
)
1846 ? ZEBRA_SR_POLICY_LABEL_CREATED
1847 : ZEBRA_SR_POLICY_LABEL_UPDATED
;
1848 zebra_sr_policy_label_update(label
, update_mode
);
1851 case DPLANE_OP_LSP_DELETE
:
1852 if (status
!= ZEBRA_DPLANE_REQUEST_SUCCESS
) {
1853 flog_warn(EC_ZEBRA_LSP_DELETE_FAILURE
,
1854 "LSP Deletion Failure: in-label %u",
1855 dplane_ctx_get_in_label(ctx
));
1858 zebra_sr_policy_label_update(label
,
1859 ZEBRA_SR_POLICY_LABEL_REMOVED
);
1869 * Process LSP installation info from two sets of nhlfes: a set from
1870 * a dplane notification, and a set from the zebra LSP object. Update
1871 * counters of installed nexthops, and return whether the LSP has changed.
1873 static bool compare_notif_nhlfes(const struct nhlfe_list_head
*ctx_head
,
1874 struct nhlfe_list_head
*nhlfe_head
,
1875 int *start_counter
, int *end_counter
)
1877 struct zebra_nhlfe
*nhlfe
;
1878 const struct zebra_nhlfe
*ctx_nhlfe
;
1879 struct nexthop
*nexthop
;
1880 const struct nexthop
*ctx_nexthop
;
1881 int start_count
= 0, end_count
= 0;
1882 bool changed_p
= false;
1883 bool is_debug
= (IS_ZEBRA_DEBUG_DPLANE
| IS_ZEBRA_DEBUG_MPLS
);
1885 frr_each_safe(nhlfe_list
, nhlfe_head
, nhlfe
) {
1886 char buf
[NEXTHOP_STRLEN
];
1888 nexthop
= nhlfe
->nexthop
;
1892 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
))
1897 frr_each(nhlfe_list_const
, ctx_head
, ctx_nhlfe
) {
1898 ctx_nexthop
= ctx_nhlfe
->nexthop
;
1902 if ((ctx_nexthop
->type
== nexthop
->type
) &&
1903 nexthop_same(ctx_nexthop
, nexthop
)) {
1910 nexthop2str(nexthop
, buf
, sizeof(buf
));
1912 if (ctx_nhlfe
&& ctx_nexthop
) {
1914 const char *tstr
= "";
1916 if (!CHECK_FLAG(ctx_nhlfe
->flags
,
1917 NHLFE_FLAG_INSTALLED
))
1920 zlog_debug("LSP dplane notif: matched nh %s (%sinstalled)",
1924 /* Test zebra nhlfe install state */
1925 if (CHECK_FLAG(ctx_nhlfe
->flags
,
1926 NHLFE_FLAG_INSTALLED
)) {
1928 if (!CHECK_FLAG(nhlfe
->flags
,
1929 NHLFE_FLAG_INSTALLED
))
1932 /* Update counter */
1936 if (CHECK_FLAG(nhlfe
->flags
,
1937 NHLFE_FLAG_INSTALLED
))
1942 /* Not mentioned in lfib set -> uninstalled */
1943 if (CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
) ||
1944 CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
) ||
1945 CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
)) {
1950 zlog_debug("LSP dplane notif: no match, nh %s",
1956 *start_counter
+= start_count
;
1958 *end_counter
+= end_count
;
1964 * Update an lsp nhlfe list from a dplane context, typically an async
1965 * notification context. Update the LSP list to match the installed
1966 * status from the context's list.
1968 static int update_nhlfes_from_ctx(struct nhlfe_list_head
*nhlfe_head
,
1969 const struct nhlfe_list_head
*ctx_head
)
1972 struct zebra_nhlfe
*nhlfe
;
1973 const struct zebra_nhlfe
*ctx_nhlfe
;
1974 struct nexthop
*nexthop
;
1975 const struct nexthop
*ctx_nexthop
;
1976 bool is_debug
= (IS_ZEBRA_DEBUG_DPLANE
| IS_ZEBRA_DEBUG_MPLS
);
1978 frr_each_safe(nhlfe_list
, nhlfe_head
, nhlfe
) {
1979 char buf
[NEXTHOP_STRLEN
];
1981 nexthop
= nhlfe
->nexthop
;
1987 frr_each(nhlfe_list_const
, ctx_head
, ctx_nhlfe
) {
1988 ctx_nexthop
= ctx_nhlfe
->nexthop
;
1992 if ((ctx_nexthop
->type
== nexthop
->type
) &&
1993 nexthop_same(ctx_nexthop
, nexthop
)) {
2000 nexthop2str(nexthop
, buf
, sizeof(buf
));
2002 if (ctx_nhlfe
&& ctx_nexthop
) {
2004 /* Bring zebra nhlfe install state into sync */
2005 if (CHECK_FLAG(ctx_nhlfe
->flags
,
2006 NHLFE_FLAG_INSTALLED
)) {
2008 zlog_debug("%s: matched lsp nhlfe %s (installed)",
2011 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
);
2012 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_SELECTED
);
2016 zlog_debug("%s: matched lsp nhlfe %s (not installed)",
2019 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
);
2020 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_SELECTED
);
2023 if (CHECK_FLAG(ctx_nhlfe
->nexthop
->flags
,
2024 NEXTHOP_FLAG_FIB
)) {
2025 SET_FLAG(nhlfe
->nexthop
->flags
,
2026 NEXTHOP_FLAG_ACTIVE
);
2027 SET_FLAG(nhlfe
->nexthop
->flags
,
2030 UNSET_FLAG(nhlfe
->nexthop
->flags
,
2031 NEXTHOP_FLAG_ACTIVE
);
2032 UNSET_FLAG(nhlfe
->nexthop
->flags
,
2037 /* Not mentioned in lfib set -> uninstalled */
2039 zlog_debug("%s: no match for lsp nhlfe %s",
2041 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
);
2042 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_SELECTED
);
2043 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
2044 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
2052 * Process async dplane notifications.
2054 void zebra_mpls_process_dplane_notify(struct zebra_dplane_ctx
*ctx
)
2056 struct zebra_vrf
*zvrf
;
2057 struct zebra_ile tmp_ile
;
2058 struct hash
*lsp_table
;
2059 struct zebra_lsp
*lsp
;
2060 const struct nhlfe_list_head
*ctx_list
;
2061 int start_count
= 0, end_count
= 0; /* Installed counts */
2062 bool changed_p
= false;
2063 bool is_debug
= (IS_ZEBRA_DEBUG_DPLANE
| IS_ZEBRA_DEBUG_MPLS
);
2064 enum zebra_sr_policy_update_label_mode update_mode
;
2067 zlog_debug("LSP dplane notif, in-label %u",
2068 dplane_ctx_get_in_label(ctx
));
2070 /* Look for zebra LSP object */
2071 zvrf
= vrf_info_lookup(VRF_DEFAULT
);
2075 lsp_table
= zvrf
->lsp_table
;
2077 tmp_ile
.in_label
= dplane_ctx_get_in_label(ctx
);
2078 lsp
= hash_lookup(lsp_table
, &tmp_ile
);
2081 zlog_debug("dplane LSP notif: in-label %u not found",
2082 dplane_ctx_get_in_label(ctx
));
2087 * The dataplane/forwarding plane is notifying zebra about the state
2088 * of the nexthops associated with this LSP. First, we take a
2089 * pre-scan pass to determine whether the LSP has transitioned
2090 * from installed -> uninstalled. In that case, we need to have
2091 * the existing state of the LSP objects available before making
2094 ctx_list
= dplane_ctx_get_nhlfe_list(ctx
);
2096 changed_p
= compare_notif_nhlfes(ctx_list
, &lsp
->nhlfe_list
,
2097 &start_count
, &end_count
);
2100 zlog_debug("LSP dplane notif: lfib start_count %d, end_count %d%s",
2101 start_count
, end_count
,
2102 changed_p
? ", changed" : "");
2104 ctx_list
= dplane_ctx_get_backup_nhlfe_list(ctx
);
2106 if (compare_notif_nhlfes(ctx_list
, &lsp
->backup_nhlfe_list
,
2107 &start_count
, &end_count
))
2108 /* Avoid accidentally setting back to 'false' */
2112 zlog_debug("LSP dplane notif: lfib backups, start_count %d, end_count %d%s",
2113 start_count
, end_count
,
2114 changed_p
? ", changed" : "");
2117 * Has the LSP become uninstalled? We need the existing state of the
2118 * nexthops/nhlfes at this point so we know what to delete.
2120 if (start_count
> 0 && end_count
== 0) {
2121 /* Inform other lfibs */
2122 dplane_lsp_notif_update(lsp
, DPLANE_OP_LSP_DELETE
, ctx
);
2126 * Now we take a second pass and bring the zebra
2127 * nexthop state into sync with the forwarding-plane state.
2129 ctx_list
= dplane_ctx_get_nhlfe_list(ctx
);
2130 update_nhlfes_from_ctx(&lsp
->nhlfe_list
, ctx_list
);
2132 ctx_list
= dplane_ctx_get_backup_nhlfe_list(ctx
);
2133 update_nhlfes_from_ctx(&lsp
->backup_nhlfe_list
, ctx_list
);
2135 if (end_count
> 0) {
2136 SET_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
);
2138 /* SR-TE update too */
2139 if (start_count
== 0)
2140 update_mode
= ZEBRA_SR_POLICY_LABEL_CREATED
;
2142 update_mode
= ZEBRA_SR_POLICY_LABEL_UPDATED
;
2143 zebra_sr_policy_label_update(lsp
->ile
.in_label
, update_mode
);
2146 dplane_lsp_notif_update(lsp
, DPLANE_OP_LSP_UPDATE
, ctx
);
2149 /* SR-TE update too */
2150 zebra_sr_policy_label_update(lsp
->ile
.in_label
,
2151 ZEBRA_SR_POLICY_LABEL_REMOVED
);
2153 UNSET_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
);
2154 clear_nhlfe_installed(lsp
);
2159 * Install dynamic LSP entry.
2161 int zebra_mpls_lsp_install(struct zebra_vrf
*zvrf
, struct route_node
*rn
,
2162 struct route_entry
*re
)
2164 struct route_table
*table
;
2165 struct zebra_fec
*fec
;
2167 table
= zvrf
->fec_table
[family2afi(PREFIX_FAMILY(&rn
->p
))];
2171 /* See if there is a configured label binding for this FEC. */
2172 fec
= fec_find(table
, &rn
->p
);
2173 if (!fec
|| fec
->label
== MPLS_INVALID_LABEL
)
2176 /* We cannot install a label forwarding entry if local label is the
2177 * implicit-null label.
2179 if (fec
->label
== MPLS_LABEL_IMPLICIT_NULL
)
2182 if (lsp_install(zvrf
, fec
->label
, rn
, re
))
2189 * Uninstall dynamic LSP entry, if any.
2191 int zebra_mpls_lsp_uninstall(struct zebra_vrf
*zvrf
, struct route_node
*rn
,
2192 struct route_entry
*re
)
2194 struct route_table
*table
;
2195 struct zebra_fec
*fec
;
2197 table
= zvrf
->fec_table
[family2afi(PREFIX_FAMILY(&rn
->p
))];
2201 /* See if there is a configured label binding for this FEC. */
2202 fec
= fec_find(table
, &rn
->p
);
2203 if (!fec
|| fec
->label
== MPLS_INVALID_LABEL
)
2206 /* Uninstall always removes all dynamic NHLFEs. */
2207 return lsp_uninstall(zvrf
, fec
->label
);
2211 * Add an NHLFE to an LSP, return the newly-added object. This path only changes
2212 * the LSP object - nothing is scheduled for processing, for example.
2214 struct zebra_nhlfe
*
2215 zebra_mpls_lsp_add_nhlfe(struct zebra_lsp
*lsp
, enum lsp_types_t lsp_type
,
2216 enum nexthop_types_t gtype
, const union g_addr
*gate
,
2217 ifindex_t ifindex
, uint8_t num_labels
,
2218 const mpls_label_t
*out_labels
)
2220 /* Just a public pass-through to the internal implementation */
2221 return nhlfe_add(lsp
, lsp_type
, gtype
, gate
, ifindex
, num_labels
,
2222 out_labels
, false /*backup*/);
2226 * Add a backup NHLFE to an LSP, return the newly-added object.
2227 * This path only changes the LSP object - nothing is scheduled for
2228 * processing, for example.
2230 struct zebra_nhlfe
*zebra_mpls_lsp_add_backup_nhlfe(
2231 struct zebra_lsp
*lsp
, enum lsp_types_t lsp_type
,
2232 enum nexthop_types_t gtype
, const union g_addr
*gate
, ifindex_t ifindex
,
2233 uint8_t num_labels
, const mpls_label_t
*out_labels
)
2235 /* Just a public pass-through to the internal implementation */
2236 return nhlfe_add(lsp
, lsp_type
, gtype
, gate
, ifindex
, num_labels
,
2241 * Add an NHLFE to an LSP based on a nexthop; return the newly-added object
2243 struct zebra_nhlfe
*zebra_mpls_lsp_add_nh(struct zebra_lsp
*lsp
,
2244 enum lsp_types_t lsp_type
,
2245 const struct nexthop
*nh
)
2247 struct zebra_nhlfe
*nhlfe
;
2249 if (nh
->nh_label
== NULL
|| nh
->nh_label
->num_labels
== 0)
2252 nhlfe
= nhlfe_add(lsp
, lsp_type
, nh
->type
, &nh
->gate
, nh
->ifindex
,
2253 nh
->nh_label
->num_labels
, nh
->nh_label
->label
,
2260 * Add a backup NHLFE to an LSP based on a nexthop;
2261 * return the newly-added object.
2263 struct zebra_nhlfe
*zebra_mpls_lsp_add_backup_nh(struct zebra_lsp
*lsp
,
2264 enum lsp_types_t lsp_type
,
2265 const struct nexthop
*nh
)
2267 struct zebra_nhlfe
*nhlfe
;
2269 if (nh
->nh_label
== NULL
|| nh
->nh_label
->num_labels
== 0)
2272 nhlfe
= nhlfe_add(lsp
, lsp_type
, nh
->type
, &nh
->gate
,
2273 nh
->ifindex
, nh
->nh_label
->num_labels
,
2274 nh
->nh_label
->label
, true);
2280 * Free an allocated NHLFE
2282 void zebra_mpls_nhlfe_free(struct zebra_nhlfe
*nhlfe
)
2284 /* Just a pass-through to the internal implementation */
2289 * Registration from a client for the label binding for a FEC. If a binding
2290 * already exists, it is informed to the client.
2291 * NOTE: If there is a manually configured label binding, that is used.
2292 * Otherwise, if a label index is specified, it means we have to allocate the
2293 * label from a locally configured label block (SRGB), if one exists and index
2294 * is acceptable. If no label index then just register the specified label.
2295 * NOTE2: Either label or label_index is expected to be set to MPLS_INVALID_*
2296 * by the calling function. Register requests with both will be rejected.
2298 int zebra_mpls_fec_register(struct zebra_vrf
*zvrf
, struct prefix
*p
,
2299 uint32_t label
, uint32_t label_index
,
2300 struct zserv
*client
)
2302 struct route_table
*table
;
2303 struct zebra_fec
*fec
;
2305 bool label_change
= false;
2307 bool have_label_index
= (label_index
!= MPLS_INVALID_LABEL_INDEX
);
2308 bool is_configured_fec
= false; /* indicate statically configured FEC */
2310 table
= zvrf
->fec_table
[family2afi(PREFIX_FAMILY(p
))];
2314 if (label
!= MPLS_INVALID_LABEL
&& have_label_index
) {
2316 EC_ZEBRA_FEC_LABEL_INDEX_LABEL_CONFLICT
,
2317 "Rejecting FEC register for %pFX with both label %u and Label Index %u specified, client %s",
2318 p
, label
, label_index
,
2319 zebra_route_string(client
->proto
));
2324 fec
= fec_find(table
, p
);
2326 fec
= fec_add(table
, p
, label
, 0, label_index
);
2329 EC_ZEBRA_FEC_ADD_FAILED
,
2330 "Failed to add FEC %pFX upon register, client %s",
2331 p
, zebra_route_string(client
->proto
));
2335 old_label
= MPLS_INVALID_LABEL
;
2338 /* Check if the FEC has been statically defined in the config */
2339 is_configured_fec
= fec
->flags
& FEC_FLAG_CONFIGURED
;
2340 /* Client may register same FEC with different label index. */
2342 (listnode_lookup(fec
->client_list
, client
) == NULL
);
2343 if (!new_client
&& fec
->label_index
== label_index
2344 && fec
->label
== label
)
2345 /* Duplicate register */
2348 /* Save current label, update the FEC */
2349 old_label
= fec
->label
;
2350 fec
->label_index
= label_index
;
2354 listnode_add(fec
->client_list
, client
);
2356 if (IS_ZEBRA_DEBUG_MPLS
)
2357 zlog_debug("FEC %pFX label%s %u %s by client %s%s", p
,
2358 have_label_index
? " index" : "",
2359 have_label_index
? label_index
: label
,
2360 new_client
? "registered" : "updated",
2361 zebra_route_string(client
->proto
),
2363 ? ", but using statically configured label"
2366 /* If not a statically configured FEC, derive the local label
2367 * from label index or use the provided label
2369 if (!is_configured_fec
) {
2370 if (have_label_index
)
2371 fec_derive_label_from_index(zvrf
, fec
);
2375 /* If no label change, exit. */
2376 if (fec
->label
== old_label
)
2379 label_change
= true;
2382 /* If new client or label change, update client and install or uninstall
2383 * label forwarding entry as needed.
2385 /* Inform client of label, if needed. */
2386 if ((new_client
&& fec
->label
!= MPLS_INVALID_LABEL
) || label_change
) {
2387 if (IS_ZEBRA_DEBUG_MPLS
)
2388 zlog_debug("Update client label %u", fec
->label
);
2389 fec_send(fec
, client
);
2392 if (new_client
|| label_change
)
2393 return fec_change_update_lsp(zvrf
, fec
, old_label
);
2399 * Deregistration from a client for the label binding for a FEC. The FEC
2400 * itself is deleted if no other registered clients exist and there is no
2401 * label bound to the FEC.
2403 int zebra_mpls_fec_unregister(struct zebra_vrf
*zvrf
, struct prefix
*p
,
2404 struct zserv
*client
)
2406 struct route_table
*table
;
2407 struct zebra_fec
*fec
;
2409 table
= zvrf
->fec_table
[family2afi(PREFIX_FAMILY(p
))];
2413 fec
= fec_find(table
, p
);
2415 flog_err(EC_ZEBRA_FEC_RM_FAILED
,
2416 "Failed to find FEC %pFX upon unregister, client %s",
2417 p
, zebra_route_string(client
->proto
));
2421 listnode_delete(fec
->client_list
, client
);
2423 if (IS_ZEBRA_DEBUG_MPLS
)
2424 zlog_debug("FEC %pFX unregistered by client %s", p
,
2425 zebra_route_string(client
->proto
));
2427 /* If not a configured entry, delete the FEC if no other clients. Before
2428 * deleting, see if any LSP needs to be uninstalled.
2430 if (!(fec
->flags
& FEC_FLAG_CONFIGURED
)
2431 && list_isempty(fec
->client_list
)) {
2432 mpls_label_t old_label
= fec
->label
;
2433 fec
->label
= MPLS_INVALID_LABEL
; /* reset */
2434 fec_change_update_lsp(zvrf
, fec
, old_label
);
2442 * Cleanup any FECs registered by this client.
2444 static int zebra_mpls_cleanup_fecs_for_client(struct zserv
*client
)
2446 struct zebra_vrf
*zvrf
= vrf_info_lookup(VRF_DEFAULT
);
2447 struct route_node
*rn
;
2448 struct zebra_fec
*fec
;
2449 struct listnode
*node
;
2450 struct zserv
*fec_client
;
2453 for (af
= AFI_IP
; af
< AFI_MAX
; af
++) {
2454 if (zvrf
->fec_table
[af
] == NULL
)
2457 for (rn
= route_top(zvrf
->fec_table
[af
]); rn
;
2458 rn
= route_next(rn
)) {
2460 if (!fec
|| list_isempty(fec
->client_list
))
2463 for (ALL_LIST_ELEMENTS_RO(fec
->client_list
, node
,
2465 if (fec_client
== client
) {
2466 listnode_delete(fec
->client_list
,
2468 if (!(fec
->flags
& FEC_FLAG_CONFIGURED
)
2469 && list_isempty(fec
->client_list
))
2480 struct lsp_uninstall_args
{
2481 struct hash
*lsp_table
;
2482 enum lsp_types_t type
;
2486 * Cleanup MPLS labels registered by this client.
2488 static int zebra_mpls_cleanup_zclient_labels(struct zserv
*client
)
2491 struct zebra_vrf
*zvrf
;
2493 RB_FOREACH (vrf
, vrf_id_head
, &vrfs_by_id
) {
2494 struct lsp_uninstall_args args
;
2501 args
.lsp_table
= zvrf
->lsp_table
;
2502 args
.type
= lsp_type_from_re_type(client
->proto
);
2503 hash_iterate(zvrf
->lsp_table
, mpls_lsp_uninstall_all_type
,
2507 mpls_ftn_uninstall_all(zvrf
, AFI_IP
,
2508 lsp_type_from_re_type(client
->proto
));
2509 mpls_ftn_uninstall_all(zvrf
, AFI_IP6
,
2510 lsp_type_from_re_type(client
->proto
));
2517 * Return FEC (if any) to which this label is bound.
2518 * Note: Only works for per-prefix binding and when the label is not
2520 * TODO: Currently walks entire table, can optimize later with another
2523 struct zebra_fec
*zebra_mpls_fec_for_label(struct zebra_vrf
*zvrf
,
2526 struct route_node
*rn
;
2527 struct zebra_fec
*fec
;
2530 for (af
= AFI_IP
; af
< AFI_MAX
; af
++) {
2531 if (zvrf
->fec_table
[af
] == NULL
)
2534 for (rn
= route_top(zvrf
->fec_table
[af
]); rn
;
2535 rn
= route_next(rn
)) {
2539 if (fec
->label
== label
)
2548 * Inform if specified label is currently bound to a FEC or not.
2550 int zebra_mpls_label_already_bound(struct zebra_vrf
*zvrf
, mpls_label_t label
)
2552 return (zebra_mpls_fec_for_label(zvrf
, label
) ? 1 : 0);
2556 * Add static FEC to label binding. If there are clients registered for this
2557 * FEC, notify them. If there are labeled routes for this FEC, install the
2558 * label forwarding entry.
2560 int zebra_mpls_static_fec_add(struct zebra_vrf
*zvrf
, struct prefix
*p
,
2561 mpls_label_t in_label
)
2563 struct route_table
*table
;
2564 struct zebra_fec
*fec
;
2565 mpls_label_t old_label
;
2568 table
= zvrf
->fec_table
[family2afi(PREFIX_FAMILY(p
))];
2572 /* Update existing FEC or create a new one. */
2573 fec
= fec_find(table
, p
);
2575 fec
= fec_add(table
, p
, in_label
, FEC_FLAG_CONFIGURED
,
2576 MPLS_INVALID_LABEL_INDEX
);
2578 flog_err(EC_ZEBRA_FEC_ADD_FAILED
,
2579 "Failed to add FEC %pFX upon config", p
);
2583 if (IS_ZEBRA_DEBUG_MPLS
)
2584 zlog_debug("Add fec %pFX label %u", p
, in_label
);
2586 fec
->flags
|= FEC_FLAG_CONFIGURED
;
2587 if (fec
->label
== in_label
)
2588 /* Duplicate config */
2591 /* Label change, update clients. */
2592 old_label
= fec
->label
;
2593 if (IS_ZEBRA_DEBUG_MPLS
)
2594 zlog_debug("Update fec %pFX new label %u", p
, in_label
);
2596 fec
->label
= in_label
;
2597 fec_update_clients(fec
);
2599 /* Update label forwarding entries appropriately */
2600 ret
= fec_change_update_lsp(zvrf
, fec
, old_label
);
2607 * Remove static FEC to label binding. If there are no clients registered
2608 * for this FEC, delete the FEC; else notify clients
2609 * Note: Upon delete of static binding, if label index exists for this FEC,
2610 * client may need to be updated with derived label.
2612 int zebra_mpls_static_fec_del(struct zebra_vrf
*zvrf
, struct prefix
*p
)
2614 struct route_table
*table
;
2615 struct zebra_fec
*fec
;
2616 mpls_label_t old_label
;
2618 table
= zvrf
->fec_table
[family2afi(PREFIX_FAMILY(p
))];
2622 fec
= fec_find(table
, p
);
2624 flog_err(EC_ZEBRA_FEC_RM_FAILED
,
2625 "Failed to find FEC %pFX upon delete", p
);
2629 if (IS_ZEBRA_DEBUG_MPLS
) {
2630 zlog_debug("Delete fec %pFX label %u label index %u", p
,
2631 fec
->label
, fec
->label_index
);
2634 old_label
= fec
->label
;
2635 fec
->flags
&= ~FEC_FLAG_CONFIGURED
;
2636 fec
->label
= MPLS_INVALID_LABEL
;
2638 /* If no client exists, just delete the FEC. */
2639 if (list_isempty(fec
->client_list
)) {
2644 /* Derive the local label (from label index) or reset it. */
2645 fec_derive_label_from_index(zvrf
, fec
);
2647 /* If there is a label change, update clients. */
2648 if (fec
->label
== old_label
)
2650 fec_update_clients(fec
);
2652 /* Update label forwarding entries appropriately */
2653 return fec_change_update_lsp(zvrf
, fec
, old_label
);
2657 * Display MPLS FEC to label binding configuration (VTY command handler).
2659 int zebra_mpls_write_fec_config(struct vty
*vty
, struct zebra_vrf
*zvrf
)
2661 struct route_node
*rn
;
2663 struct zebra_fec
*fec
;
2666 for (af
= AFI_IP
; af
< AFI_MAX
; af
++) {
2667 if (zvrf
->fec_table
[af
] == NULL
)
2670 for (rn
= route_top(zvrf
->fec_table
[af
]); rn
;
2671 rn
= route_next(rn
)) {
2678 if (!(fec
->flags
& FEC_FLAG_CONFIGURED
))
2682 vty_out(vty
, "mpls label bind %pFX %s\n", &rn
->p
,
2683 label2str(fec
->label
, lstr
, BUFSIZ
));
2691 * Display MPLS FEC to label binding (VTY command handler).
2693 void zebra_mpls_print_fec_table(struct vty
*vty
, struct zebra_vrf
*zvrf
)
2695 struct route_node
*rn
;
2698 for (af
= AFI_IP
; af
< AFI_MAX
; af
++) {
2699 if (zvrf
->fec_table
[af
] == NULL
)
2702 for (rn
= route_top(zvrf
->fec_table
[af
]); rn
;
2703 rn
= route_next(rn
)) {
2706 fec_print(rn
->info
, vty
);
2712 * Display MPLS FEC to label binding for a specific FEC (VTY command handler).
2714 void zebra_mpls_print_fec(struct vty
*vty
, struct zebra_vrf
*zvrf
,
2717 struct route_table
*table
;
2718 struct route_node
*rn
;
2720 table
= zvrf
->fec_table
[family2afi(PREFIX_FAMILY(p
))];
2725 rn
= route_node_lookup(table
, p
);
2729 route_unlock_node(rn
);
2733 fec_print(rn
->info
, vty
);
2736 static void mpls_zebra_nhe_update(struct route_entry
*re
, afi_t afi
,
2737 struct nhg_hash_entry
*new_nhe
)
2739 struct nhg_hash_entry
*nhe
;
2741 nhe
= zebra_nhg_rib_find_nhe(new_nhe
, afi
);
2743 route_entry_update_nhe(re
, nhe
);
2746 static bool ftn_update_nexthop(bool add_p
, struct nexthop
*nexthop
,
2747 enum lsp_types_t type
,
2748 const struct zapi_nexthop
*znh
)
2750 if (add_p
&& nexthop
->nh_label_type
== ZEBRA_LSP_NONE
)
2751 nexthop_add_labels(nexthop
, type
, znh
->label_num
, znh
->labels
);
2752 else if (!add_p
&& nexthop
->nh_label_type
== type
)
2753 nexthop_del_labels(nexthop
);
2760 int mpls_ftn_uninstall(struct zebra_vrf
*zvrf
, enum lsp_types_t type
,
2761 struct prefix
*prefix
, uint8_t route_type
,
2762 unsigned short route_instance
)
2764 struct route_table
*table
;
2765 struct route_node
*rn
;
2766 struct route_entry
*re
;
2767 struct nexthop
*nexthop
;
2768 struct nhg_hash_entry
*new_nhe
;
2769 afi_t afi
= family2afi(prefix
->family
);
2772 table
= zebra_vrf_table(afi
, SAFI_UNICAST
, zvrf_id(zvrf
));
2776 /* Lookup existing route */
2777 rn
= route_node_get(table
, prefix
);
2778 RNODE_FOREACH_RE (rn
, re
) {
2779 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
))
2781 if (re
->type
== route_type
&& re
->instance
== route_instance
)
2788 * Nexthops are now shared by multiple routes, so we have to make
2789 * a local copy, modify the copy, then update the route.
2791 new_nhe
= zebra_nhe_copy(re
->nhe
, 0);
2793 for (nexthop
= new_nhe
->nhg
.nexthop
; nexthop
; nexthop
= nexthop
->next
)
2794 nexthop_del_labels(nexthop
);
2796 /* Update backup routes/nexthops also, if present. */
2797 if (zebra_nhg_get_backup_nhg(new_nhe
) != NULL
) {
2798 for (nexthop
= new_nhe
->backup_info
->nhe
->nhg
.nexthop
; nexthop
;
2799 nexthop
= nexthop
->next
)
2800 nexthop_del_labels(nexthop
);
2803 SET_FLAG(re
->status
, ROUTE_ENTRY_CHANGED
);
2804 SET_FLAG(re
->status
, ROUTE_ENTRY_LABELS_CHANGED
);
2806 /* This will create (or ref) a new nhe, so we will discard the local
2809 mpls_zebra_nhe_update(re
, afi
, new_nhe
);
2811 zebra_nhg_free(new_nhe
);
2819 * Iterate through a list of nexthops, for a match for 'znh'. If found,
2820 * update its labels according to 'add_p', and return 'true' if successful.
2822 static bool ftn_update_znh(bool add_p
, enum lsp_types_t type
,
2823 struct nexthop
*head
, const struct zapi_nexthop
*znh
)
2825 bool found
= false, success
= false;
2826 struct nexthop
*nexthop
;
2828 for (nexthop
= head
; nexthop
; nexthop
= nexthop
->next
) {
2829 switch (nexthop
->type
) {
2830 case NEXTHOP_TYPE_IPV4
:
2831 case NEXTHOP_TYPE_IPV4_IFINDEX
:
2832 if (znh
->type
!= NEXTHOP_TYPE_IPV4
2833 && znh
->type
!= NEXTHOP_TYPE_IPV4_IFINDEX
)
2835 if (!IPV4_ADDR_SAME(&nexthop
->gate
.ipv4
,
2838 if (nexthop
->type
== NEXTHOP_TYPE_IPV4_IFINDEX
2839 && nexthop
->ifindex
!= znh
->ifindex
)
2844 if (!ftn_update_nexthop(add_p
, nexthop
, type
, znh
))
2849 case NEXTHOP_TYPE_IPV6
:
2850 case NEXTHOP_TYPE_IPV6_IFINDEX
:
2851 if (znh
->type
!= NEXTHOP_TYPE_IPV6
2852 && znh
->type
!= NEXTHOP_TYPE_IPV6_IFINDEX
)
2854 if (!IPV6_ADDR_SAME(&nexthop
->gate
.ipv6
,
2857 if (nexthop
->type
== NEXTHOP_TYPE_IPV6_IFINDEX
2858 && nexthop
->ifindex
!= znh
->ifindex
)
2863 if (!ftn_update_nexthop(add_p
, nexthop
, type
, znh
))
2867 case NEXTHOP_TYPE_IFINDEX
:
2868 if (znh
->type
!= NEXTHOP_TYPE_IFINDEX
)
2870 if (nexthop
->ifindex
!= znh
->ifindex
)
2875 if (!ftn_update_nexthop(add_p
, nexthop
, type
, znh
))
2879 case NEXTHOP_TYPE_BLACKHOLE
:
2892 * Install/uninstall LSP and (optionally) FEC-To-NHLFE (FTN) bindings,
2893 * using zapi message info.
2894 * There are several changes that need to be made, in several zebra
2895 * data structures, so we want to do all the work required at once.
2897 int mpls_zapi_labels_process(bool add_p
, struct zebra_vrf
*zvrf
,
2898 const struct zapi_labels
*zl
)
2900 int i
, counter
, ret
= 0;
2901 char buf
[NEXTHOP_STRLEN
];
2902 const struct zapi_nexthop
*znh
;
2903 struct route_table
*table
;
2904 struct route_node
*rn
= NULL
;
2905 struct route_entry
*re
= NULL
;
2906 struct nhg_hash_entry
*new_nhe
= NULL
;
2909 const struct prefix
*prefix
= NULL
;
2910 struct hash
*lsp_table
;
2911 struct zebra_ile tmp_ile
;
2912 struct zebra_lsp
*lsp
= NULL
;
2914 /* Prep LSP for add case */
2917 lsp_table
= zvrf
->lsp_table
;
2921 /* Find or create LSP object */
2922 tmp_ile
.in_label
= zl
->local_label
;
2923 lsp
= hash_get(lsp_table
, &tmp_ile
, lsp_alloc
);
2926 /* Prep for route/FEC update if requested */
2927 if (CHECK_FLAG(zl
->message
, ZAPI_LABELS_FTN
)) {
2928 prefix
= &zl
->route
.prefix
;
2930 afi
= family2afi(prefix
->family
);
2933 table
= zebra_vrf_table(afi
, SAFI_UNICAST
, zvrf_id(zvrf
));
2935 /* Lookup existing route */
2936 rn
= route_node_get(table
, prefix
);
2937 RNODE_FOREACH_RE(rn
, re
) {
2938 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
))
2940 if (re
->type
== zl
->route
.type
&&
2941 re
->instance
== zl
->route
.instance
)
2948 * Copy over current nexthops into a temporary group.
2949 * We can't just change the values here since the nhgs
2950 * are shared and if the labels change, we'll need
2951 * to find or create a new nhg. We need to create
2952 * a whole temporary group, make changes to it,
2953 * then attach that to the route.
2955 new_nhe
= zebra_nhe_copy(re
->nhe
, 0);
2959 * The old version of the zapi code
2960 * attempted to manage LSPs before trying to
2961 * find a route/FEC, so we'll continue that way.
2963 if (IS_ZEBRA_DEBUG_RECV
|| IS_ZEBRA_DEBUG_MPLS
)
2965 "%s: FTN update requested: no route for prefix %pFX",
2971 * Use info from the zapi nexthops to add/replace/remove LSP/FECs
2975 for (i
= 0; i
< zl
->nexthop_num
; i
++) {
2977 znh
= &zl
->nexthops
[i
];
2979 /* Attempt LSP update */
2981 ret
= lsp_znh_install(lsp
, zl
->type
, znh
);
2983 ret
= mpls_lsp_uninstall(zvrf
, zl
->type
,
2984 zl
->local_label
, znh
->type
,
2985 &znh
->gate
, znh
->ifindex
,
2988 if (IS_ZEBRA_DEBUG_RECV
|| IS_ZEBRA_DEBUG_MPLS
) {
2989 zapi_nexthop2str(znh
, buf
, sizeof(buf
));
2990 zlog_debug("%s: Unable to %sinstall LSP: label %u, znh %s",
2991 __func__
, (add_p
? "" : "un"),
2992 zl
->local_label
, buf
);
2997 /* Attempt route/FEC update if requested */
3001 /* Search the route's nexthops for a match, and update it. */
3002 found
= ftn_update_znh(add_p
, zl
->type
, new_nhe
->nhg
.nexthop
,
3006 } else if (IS_ZEBRA_DEBUG_RECV
| IS_ZEBRA_DEBUG_MPLS
) {
3007 zapi_nexthop2str(znh
, buf
, sizeof(buf
));
3009 "%s: Unable to update FEC: prefix %pFX, label %u, znh %s",
3010 __func__
, prefix
, zl
->local_label
, buf
);
3015 * Process backup LSPs/nexthop entries also. We associate backup
3016 * LSP info with backup nexthops.
3018 if (!CHECK_FLAG(zl
->message
, ZAPI_LABELS_HAS_BACKUPS
))
3021 for (i
= 0; i
< zl
->backup_nexthop_num
; i
++) {
3023 znh
= &zl
->backup_nexthops
[i
];
3026 ret
= lsp_backup_znh_install(lsp
, zl
->type
, znh
);
3028 ret
= mpls_lsp_uninstall(zvrf
, zl
->type
,
3030 znh
->type
, &znh
->gate
,
3031 znh
->ifindex
, true);
3034 if (IS_ZEBRA_DEBUG_RECV
||
3035 IS_ZEBRA_DEBUG_MPLS
) {
3036 zapi_nexthop2str(znh
, buf
, sizeof(buf
));
3037 zlog_debug("%s: Unable to %sinstall backup LSP: label %u, znh %s",
3038 __func__
, (add_p
? "" : "un"),
3039 zl
->local_label
, buf
);
3044 /* Attempt backup nexthop/FEC update if requested */
3045 if (re
== NULL
|| zebra_nhg_get_backup_nhg(new_nhe
) == NULL
)
3048 /* Search the route's backup nexthops for a match
3051 found
= ftn_update_znh(add_p
, zl
->type
,
3052 new_nhe
->backup_info
->nhe
->nhg
.nexthop
,
3056 } else if (IS_ZEBRA_DEBUG_RECV
| IS_ZEBRA_DEBUG_MPLS
) {
3057 zapi_nexthop2str(znh
, buf
, sizeof(buf
));
3059 "%s: Unable to update backup FEC: prefix %pFX, label %u, znh %s",
3060 __func__
, prefix
, zl
->local_label
, buf
);
3067 * If we made changes, update the route, and schedule it
3068 * for rib processing
3070 if (re
!= NULL
&& counter
> 0) {
3073 SET_FLAG(re
->status
, ROUTE_ENTRY_CHANGED
);
3074 SET_FLAG(re
->status
, ROUTE_ENTRY_LABELS_CHANGED
);
3076 mpls_zebra_nhe_update(re
, afi
, new_nhe
);
3082 zebra_nhg_free(new_nhe
);
3088 * Install/update a NHLFE for an LSP in the forwarding table. This may be
3089 * a new LSP entry or a new NHLFE for an existing in-label or an update of
3090 * the out-label for an existing NHLFE (update case).
3092 static struct zebra_nhlfe
*
3093 lsp_add_nhlfe(struct zebra_lsp
*lsp
, enum lsp_types_t type
,
3094 uint8_t num_out_labels
, const mpls_label_t
*out_labels
,
3095 enum nexthop_types_t gtype
, const union g_addr
*gate
,
3096 ifindex_t ifindex
, bool is_backup
)
3098 struct zebra_nhlfe
*nhlfe
;
3099 char buf
[MPLS_LABEL_STRLEN
];
3100 const char *backup_str
;
3103 nhlfe
= nhlfe_find(&lsp
->backup_nhlfe_list
, type
, gtype
,
3105 backup_str
= "backup ";
3107 nhlfe
= nhlfe_find(&lsp
->nhlfe_list
, type
, gtype
, gate
,
3113 struct nexthop
*nh
= nhlfe
->nexthop
;
3116 assert(nh
->nh_label
);
3118 /* Clear deleted flag (in case it was set) */
3119 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
);
3120 if (nh
->nh_label
->num_labels
== num_out_labels
3121 && !memcmp(nh
->nh_label
->label
, out_labels
,
3122 sizeof(mpls_label_t
) * num_out_labels
))
3126 if (IS_ZEBRA_DEBUG_MPLS
) {
3127 char buf2
[MPLS_LABEL_STRLEN
];
3128 char buf3
[MPLS_LABEL_STRLEN
];
3130 nhlfe2str(nhlfe
, buf
, sizeof(buf
));
3131 mpls_label2str(num_out_labels
, out_labels
, buf2
,
3133 mpls_label2str(nh
->nh_label
->num_labels
,
3134 nh
->nh_label
->label
, buf3
, sizeof(buf3
),
3137 zlog_debug("LSP in-label %u type %d %snexthop %s out-label(s) changed to %s (old %s)",
3138 lsp
->ile
.in_label
, type
, backup_str
, buf
,
3142 /* Update out label(s), trigger processing. */
3143 if (nh
->nh_label
->num_labels
== num_out_labels
)
3144 memcpy(nh
->nh_label
->label
, out_labels
,
3145 sizeof(mpls_label_t
) * num_out_labels
);
3147 nexthop_del_labels(nh
);
3148 nexthop_add_labels(nh
, type
, num_out_labels
,
3152 /* Add LSP entry to this nexthop */
3153 nhlfe
= nhlfe_add(lsp
, type
, gtype
, gate
, ifindex
,
3154 num_out_labels
, out_labels
, is_backup
);
3158 if (IS_ZEBRA_DEBUG_MPLS
) {
3159 char buf2
[MPLS_LABEL_STRLEN
];
3161 nhlfe2str(nhlfe
, buf
, sizeof(buf
));
3162 mpls_label2str(num_out_labels
, out_labels
, buf2
,
3165 zlog_debug("Add LSP in-label %u type %d %snexthop %s out-label(s) %s",
3166 lsp
->ile
.in_label
, type
, backup_str
, buf
,
3170 lsp
->addr_family
= NHLFE_FAMILY(nhlfe
);
3173 /* Mark NHLFE, queue LSP for processing. */
3174 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_CHANGED
);
3180 * Install an LSP and forwarding entry; used primarily
3181 * from vrf zapi message processing.
3183 int mpls_lsp_install(struct zebra_vrf
*zvrf
, enum lsp_types_t type
,
3184 mpls_label_t in_label
, uint8_t num_out_labels
,
3185 const mpls_label_t
*out_labels
, enum nexthop_types_t gtype
,
3186 const union g_addr
*gate
, ifindex_t ifindex
)
3188 struct hash
*lsp_table
;
3189 struct zebra_ile tmp_ile
;
3190 struct zebra_lsp
*lsp
;
3191 struct zebra_nhlfe
*nhlfe
;
3194 lsp_table
= zvrf
->lsp_table
;
3198 /* Find or create LSP object */
3199 tmp_ile
.in_label
= in_label
;
3200 lsp
= hash_get(lsp_table
, &tmp_ile
, lsp_alloc
);
3202 nhlfe
= lsp_add_nhlfe(lsp
, type
, num_out_labels
, out_labels
, gtype
,
3203 gate
, ifindex
, false /*backup*/);
3207 /* Queue LSP for processing. */
3208 if (lsp_processq_add(lsp
))
3215 * Install or replace NHLFE, using info from zapi nexthop
3217 static int lsp_znh_install(struct zebra_lsp
*lsp
, enum lsp_types_t type
,
3218 const struct zapi_nexthop
*znh
)
3220 struct zebra_nhlfe
*nhlfe
;
3222 nhlfe
= lsp_add_nhlfe(lsp
, type
, znh
->label_num
, znh
->labels
,
3223 znh
->type
, &znh
->gate
, znh
->ifindex
,
3228 /* Update backup info if present */
3229 if (CHECK_FLAG(znh
->flags
, ZAPI_NEXTHOP_FLAG_HAS_BACKUP
)) {
3230 if (znh
->backup_num
> NEXTHOP_MAX_BACKUPS
) {
3235 nhlfe
->nexthop
->backup_num
= znh
->backup_num
;
3236 memcpy(nhlfe
->nexthop
->backup_idx
, znh
->backup_idx
,
3238 SET_FLAG(nhlfe
->nexthop
->flags
, NEXTHOP_FLAG_HAS_BACKUP
);
3240 /* Ensure there's no stale backup info */
3241 UNSET_FLAG(nhlfe
->nexthop
->flags
, NEXTHOP_FLAG_HAS_BACKUP
);
3242 nhlfe
->nexthop
->backup_num
= 0;
3245 /* Queue LSP for processing. */
3246 if (lsp_processq_add(lsp
))
3253 * Install/update backup NHLFE for an LSP, using info from a zapi message.
3255 static int lsp_backup_znh_install(struct zebra_lsp
*lsp
, enum lsp_types_t type
,
3256 const struct zapi_nexthop
*znh
)
3258 struct zebra_nhlfe
*nhlfe
;
3260 nhlfe
= lsp_add_nhlfe(lsp
, type
, znh
->label_num
,
3261 znh
->labels
, znh
->type
, &znh
->gate
,
3262 znh
->ifindex
, true /*backup*/);
3263 if (nhlfe
== NULL
) {
3264 if (IS_ZEBRA_DEBUG_MPLS
)
3265 zlog_debug("%s: unable to add backup nhlfe, label: %u",
3266 __func__
, lsp
->ile
.in_label
);
3270 /* Queue LSP for processing. */
3271 if (lsp_processq_add(lsp
))
3277 struct zebra_lsp
*mpls_lsp_find(struct zebra_vrf
*zvrf
, mpls_label_t in_label
)
3279 struct hash
*lsp_table
;
3280 struct zebra_ile tmp_ile
;
3283 lsp_table
= zvrf
->lsp_table
;
3287 /* If entry is not present, exit. */
3288 tmp_ile
.in_label
= in_label
;
3289 return hash_lookup(lsp_table
, &tmp_ile
);
3293 * Uninstall a particular NHLFE in the forwarding table. If this is
3294 * the only NHLFE, the entire LSP forwarding entry has to be deleted.
3296 int mpls_lsp_uninstall(struct zebra_vrf
*zvrf
, enum lsp_types_t type
,
3297 mpls_label_t in_label
, enum nexthop_types_t gtype
,
3298 const union g_addr
*gate
, ifindex_t ifindex
,
3301 struct hash
*lsp_table
;
3302 struct zebra_ile tmp_ile
;
3303 struct zebra_lsp
*lsp
;
3304 struct zebra_nhlfe
*nhlfe
;
3305 char buf
[NEXTHOP_STRLEN
];
3306 bool schedule_lsp
= false;
3309 lsp_table
= zvrf
->lsp_table
;
3313 /* If entry is not present, exit. */
3314 tmp_ile
.in_label
= in_label
;
3315 lsp
= hash_lookup(lsp_table
, &tmp_ile
);
3320 nhlfe
= nhlfe_find(&lsp
->backup_nhlfe_list
, type
, gtype
,
3323 nhlfe
= nhlfe_find(&lsp
->nhlfe_list
, type
, gtype
, gate
,
3328 if (IS_ZEBRA_DEBUG_MPLS
) {
3329 nhlfe2str(nhlfe
, buf
, sizeof(buf
));
3330 zlog_debug("Del LSP in-label %u type %d nexthop %s flags 0x%x",
3331 in_label
, type
, buf
, nhlfe
->flags
);
3334 if (CHECK_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
) ||
3335 CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
))
3336 schedule_lsp
= true;
3338 /* Mark NHLFE for delete or directly delete, as appropriate. */
3340 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
);
3341 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_CHANGED
);
3343 if (IS_ZEBRA_DEBUG_MPLS
)
3344 zlog_debug("Schedule LSP in-label %u flags 0x%x",
3345 lsp
->ile
.in_label
, lsp
->flags
);
3346 if (lsp_processq_add(lsp
))
3351 /* Free LSP entry if no other NHLFEs and not scheduled. */
3352 lsp_check_free(lsp_table
, &lsp
);
3357 int mpls_lsp_uninstall_all_vrf(struct zebra_vrf
*zvrf
, enum lsp_types_t type
,
3358 mpls_label_t in_label
)
3360 struct hash
*lsp_table
;
3361 struct zebra_ile tmp_ile
;
3362 struct zebra_lsp
*lsp
;
3365 lsp_table
= zvrf
->lsp_table
;
3369 /* If entry is not present, exit. */
3370 tmp_ile
.in_label
= in_label
;
3371 lsp
= hash_lookup(lsp_table
, &tmp_ile
);
3375 return mpls_lsp_uninstall_all(lsp_table
, lsp
, type
);
3379 * Uninstall all NHLFEs for a particular LSP forwarding entry.
3380 * If no other NHLFEs exist, the entry would be deleted.
3382 static void mpls_lsp_uninstall_all_type(struct hash_bucket
*bucket
, void *ctxt
)
3384 struct lsp_uninstall_args
*args
= ctxt
;
3385 struct zebra_lsp
*lsp
;
3386 struct hash
*lsp_table
;
3388 lsp
= (struct zebra_lsp
*)bucket
->data
;
3389 if (nhlfe_list_first(&lsp
->nhlfe_list
) == NULL
)
3392 lsp_table
= args
->lsp_table
;
3396 mpls_lsp_uninstall_all(lsp_table
, lsp
, args
->type
);
3400 * Uninstall all FEC-To-NHLFE (FTN) bindings of the given address-family and
3403 static void mpls_ftn_uninstall_all(struct zebra_vrf
*zvrf
,
3404 int afi
, enum lsp_types_t lsp_type
)
3406 struct route_table
*table
;
3407 struct route_node
*rn
;
3408 struct route_entry
*re
;
3409 struct nexthop
*nexthop
;
3410 struct nexthop_group
*nhg
;
3413 /* Process routes of interested address-families. */
3414 table
= zebra_vrf_table(afi
, SAFI_UNICAST
, zvrf_id(zvrf
));
3418 for (rn
= route_top(table
); rn
; rn
= route_next(rn
)) {
3421 RNODE_FOREACH_RE (rn
, re
) {
3422 struct nhg_hash_entry
*new_nhe
;
3424 new_nhe
= zebra_nhe_copy(re
->nhe
, 0);
3426 nhg
= &new_nhe
->nhg
;
3427 for (nexthop
= nhg
->nexthop
; nexthop
;
3428 nexthop
= nexthop
->next
) {
3429 if (nexthop
->nh_label_type
!= lsp_type
)
3432 nexthop_del_labels(nexthop
);
3433 SET_FLAG(re
->status
, ROUTE_ENTRY_CHANGED
);
3434 SET_FLAG(re
->status
,
3435 ROUTE_ENTRY_LABELS_CHANGED
);
3439 /* Check for backup info and update that also */
3440 nhg
= zebra_nhg_get_backup_nhg(new_nhe
);
3442 for (nexthop
= nhg
->nexthop
; nexthop
;
3443 nexthop
= nexthop
->next
) {
3444 if (nexthop
->nh_label_type
!= lsp_type
)
3447 nexthop_del_labels(nexthop
);
3448 SET_FLAG(re
->status
,
3449 ROUTE_ENTRY_CHANGED
);
3450 SET_FLAG(re
->status
,
3451 ROUTE_ENTRY_LABELS_CHANGED
);
3456 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_LABELS_CHANGED
))
3457 mpls_zebra_nhe_update(re
, afi
, new_nhe
);
3459 zebra_nhg_free(new_nhe
);
3467 #if defined(HAVE_CUMULUS)
3469 * Check that the label values used in LSP creation are consistent. The
3470 * main criteria is that if there is ECMP, the label operation must still
3471 * be consistent - i.e., all paths either do a swap or do PHP. This is due
3472 * to current HW restrictions.
3474 int zebra_mpls_lsp_label_consistent(struct zebra_vrf
*zvrf
,
3475 mpls_label_t in_label
,
3476 mpls_label_t out_label
,
3477 enum nexthop_types_t gtype
,
3478 union g_addr
*gate
, ifindex_t ifindex
)
3480 struct hash
*slsp_table
;
3481 struct zebra_ile tmp_ile
;
3482 struct zebra_lsp
*lsp
;
3483 struct zebra_nhlfe
*nhlfe
;
3484 const struct nexthop
*nh
;
3487 slsp_table
= zvrf
->slsp_table
;
3491 /* If entry is not present, exit. */
3492 tmp_ile
.in_label
= in_label
;
3493 lsp
= hash_lookup(slsp_table
, &tmp_ile
);
3497 nhlfe
= nhlfe_find(&lsp
->nhlfe_list
, ZEBRA_LSP_STATIC
,
3498 gtype
, gate
, ifindex
);
3500 nh
= nhlfe
->nexthop
;
3502 if (nh
== NULL
|| nh
->nh_label
== NULL
)
3505 if (nh
->nh_label
->label
[0] == out_label
)
3508 /* If not only NHLFE, cannot allow label change. */
3509 if (nhlfe
!= nhlfe_list_first(&lsp
->nhlfe_list
) ||
3510 nhlfe_list_next(&lsp
->nhlfe_list
, nhlfe
) != NULL
)
3513 /* If other NHLFEs exist, label operation must match. */
3514 nhlfe
= nhlfe_list_first(&lsp
->nhlfe_list
);
3515 if (nhlfe
!= NULL
) {
3518 nh
= nhlfe
->nexthop
;
3520 if (nh
== NULL
|| nh
->nh_label
== NULL
)
3523 cur_op
= (nh
->nh_label
->label
[0] ==
3524 MPLS_LABEL_IMPLICIT_NULL
);
3525 new_op
= (out_label
== MPLS_LABEL_IMPLICIT_NULL
);
3526 if (cur_op
!= new_op
)
3531 /* Label values are good. */
3534 #endif /* HAVE_CUMULUS */
3537 * Add static LSP entry. This may be the first entry for this incoming label
3538 * or an additional nexthop; an existing entry may also have outgoing label
3540 * Note: The label operation (swap or PHP) is common for the LSP entry (all
3543 int zebra_mpls_static_lsp_add(struct zebra_vrf
*zvrf
, mpls_label_t in_label
,
3544 mpls_label_t out_label
,
3545 enum nexthop_types_t gtype
, union g_addr
*gate
,
3548 struct hash
*slsp_table
;
3549 struct zebra_ile tmp_ile
;
3550 struct zebra_lsp
*lsp
;
3551 struct zebra_nhlfe
*nhlfe
;
3555 slsp_table
= zvrf
->slsp_table
;
3559 /* Find or create LSP. */
3560 tmp_ile
.in_label
= in_label
;
3561 lsp
= hash_get(slsp_table
, &tmp_ile
, lsp_alloc
);
3563 nhlfe
= nhlfe_find(&lsp
->nhlfe_list
, ZEBRA_LSP_STATIC
, gtype
, gate
,
3566 struct nexthop
*nh
= nhlfe
->nexthop
;
3569 assert(nh
->nh_label
);
3571 /* Compare existing nexthop */
3572 if (nh
->nh_label
->num_labels
== 1 &&
3573 nh
->nh_label
->label
[0] == out_label
)
3577 if (IS_ZEBRA_DEBUG_MPLS
) {
3578 nhlfe2str(nhlfe
, buf
, sizeof(buf
));
3580 "Upd static LSP in-label %u nexthop %s out-label %u (old %u)",
3581 in_label
, buf
, out_label
,
3582 nh
->nh_label
->label
[0]);
3584 if (nh
->nh_label
->num_labels
== 1)
3585 nh
->nh_label
->label
[0] = out_label
;
3587 nexthop_del_labels(nh
);
3588 nexthop_add_labels(nh
, ZEBRA_LSP_STATIC
, 1, &out_label
);
3592 /* Add static LSP entry to this nexthop */
3593 nhlfe
= nhlfe_add(lsp
, ZEBRA_LSP_STATIC
, gtype
, gate
,
3594 ifindex
, 1, &out_label
, false /*backup*/);
3598 if (IS_ZEBRA_DEBUG_MPLS
) {
3599 nhlfe2str(nhlfe
, buf
, sizeof(buf
));
3601 "Add static LSP in-label %u nexthop %s out-label %u",
3602 in_label
, buf
, out_label
);
3606 /* (Re)Install LSP in the main table. */
3607 if (mpls_lsp_install(zvrf
, ZEBRA_LSP_STATIC
, in_label
, 1, &out_label
,
3608 gtype
, gate
, ifindex
))
3615 * Delete static LSP entry. This may be the delete of one particular
3616 * NHLFE for this incoming label or the delete of the entire entry (i.e.,
3618 * NOTE: Delete of the only NHLFE will also end up deleting the entire
3619 * LSP configuration.
3621 int zebra_mpls_static_lsp_del(struct zebra_vrf
*zvrf
, mpls_label_t in_label
,
3622 enum nexthop_types_t gtype
, union g_addr
*gate
,
3625 struct hash
*slsp_table
;
3626 struct zebra_ile tmp_ile
;
3627 struct zebra_lsp
*lsp
;
3628 struct zebra_nhlfe
*nhlfe
;
3631 slsp_table
= zvrf
->slsp_table
;
3635 /* If entry is not present, exit. */
3636 tmp_ile
.in_label
= in_label
;
3637 lsp
= hash_lookup(slsp_table
, &tmp_ile
);
3641 /* Is it delete of entire LSP or a specific NHLFE? */
3642 if (gtype
== NEXTHOP_TYPE_BLACKHOLE
) {
3643 if (IS_ZEBRA_DEBUG_MPLS
)
3644 zlog_debug("Del static LSP in-label %u", in_label
);
3646 /* Uninstall entire LSP from the main table. */
3647 mpls_static_lsp_uninstall_all(zvrf
, in_label
);
3649 /* Delete all static NHLFEs */
3650 frr_each_safe(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
3654 /* Find specific NHLFE, exit if not found. */
3655 nhlfe
= nhlfe_find(&lsp
->nhlfe_list
, ZEBRA_LSP_STATIC
,
3656 gtype
, gate
, ifindex
);
3660 if (IS_ZEBRA_DEBUG_MPLS
) {
3662 nhlfe2str(nhlfe
, buf
, sizeof(buf
));
3663 zlog_debug("Del static LSP in-label %u nexthop %s",
3667 /* Uninstall LSP from the main table. */
3668 mpls_lsp_uninstall(zvrf
, ZEBRA_LSP_STATIC
, in_label
, gtype
,
3669 gate
, ifindex
, false);
3671 /* Delete static LSP NHLFE */
3675 /* Remove entire static LSP entry if no NHLFE - valid in either case
3678 if (nhlfe_list_first(&lsp
->nhlfe_list
) == NULL
) {
3679 lsp
= hash_release(slsp_table
, &tmp_ile
);
3680 lsp_free_nhlfe(lsp
);
3681 XFREE(MTYPE_LSP
, lsp
);
3688 * Schedule all MPLS label forwarding entries for processing.
3689 * Called upon changes that may affect one or more of them such as
3690 * interface or nexthop state changes.
3692 void zebra_mpls_lsp_schedule(struct zebra_vrf
*zvrf
)
3696 hash_iterate(zvrf
->lsp_table
, lsp_schedule
, NULL
);
3700 * Display MPLS label forwarding table for a specific LSP
3701 * (VTY command handler).
3703 void zebra_mpls_print_lsp(struct vty
*vty
, struct zebra_vrf
*zvrf
,
3704 mpls_label_t label
, bool use_json
)
3706 struct hash
*lsp_table
;
3707 struct zebra_lsp
*lsp
;
3708 struct zebra_ile tmp_ile
;
3709 json_object
*json
= NULL
;
3712 lsp_table
= zvrf
->lsp_table
;
3716 /* If entry is not present, exit. */
3717 tmp_ile
.in_label
= label
;
3718 lsp
= hash_lookup(lsp_table
, &tmp_ile
);
3723 json
= lsp_json(lsp
);
3724 vty_json(vty
, json
);
3726 lsp_print(vty
, lsp
);
3730 * Display MPLS label forwarding table (VTY command handler).
3732 void zebra_mpls_print_lsp_table(struct vty
*vty
, struct zebra_vrf
*zvrf
,
3736 json_object
*json
= NULL
;
3737 struct zebra_lsp
*lsp
= NULL
;
3738 struct zebra_nhlfe
*nhlfe
= NULL
;
3739 struct listnode
*node
= NULL
;
3740 struct list
*lsp_list
= hash_get_sorted_list(zvrf
->lsp_table
, lsp_cmp
);
3743 json
= json_object_new_object();
3745 for (ALL_LIST_ELEMENTS_RO(lsp_list
, node
, lsp
))
3746 json_object_object_add(
3747 json
, label2str(lsp
->ile
.in_label
, buf
,
3751 vty_json(vty
, json
);
3755 /* Prepare table. */
3756 tt
= ttable_new(&ttable_styles
[TTSTYLE_BLANK
]);
3757 ttable_add_row(tt
, "Inbound Label|Type|Nexthop|Outbound Label");
3758 tt
->style
.cell
.rpad
= 2;
3759 tt
->style
.corner
= '+';
3761 ttable_rowseps(tt
, 0, BOTTOM
, true, '-');
3763 for (ALL_LIST_ELEMENTS_RO(lsp_list
, node
, lsp
)) {
3764 frr_each_safe(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
3765 struct nexthop
*nexthop
;
3766 const char *out_label_str
;
3767 char nh_buf
[NEXTHOP_STRLEN
];
3769 nexthop
= nhlfe
->nexthop
;
3771 switch (nexthop
->type
) {
3772 case NEXTHOP_TYPE_IFINDEX
: {
3773 struct zebra_ns
*zns
;
3774 struct interface
*ifp
;
3776 zns
= zebra_ns_lookup(NS_DEFAULT
);
3777 ifp
= if_lookup_by_index_per_ns(
3778 zns
, nexthop
->ifindex
);
3779 snprintf(nh_buf
, sizeof(nh_buf
), "%s",
3780 ifp
? ifp
->name
: "Null");
3783 case NEXTHOP_TYPE_IPV4
:
3784 case NEXTHOP_TYPE_IPV4_IFINDEX
:
3785 inet_ntop(AF_INET
, &nexthop
->gate
.ipv4
,
3786 nh_buf
, sizeof(nh_buf
));
3788 case NEXTHOP_TYPE_IPV6
:
3789 case NEXTHOP_TYPE_IPV6_IFINDEX
:
3790 inet_ntop(AF_INET6
, &nexthop
->gate
.ipv6
,
3791 nh_buf
, sizeof(nh_buf
));
3793 case NEXTHOP_TYPE_BLACKHOLE
:
3797 if (nexthop
->type
!= NEXTHOP_TYPE_IFINDEX
)
3798 out_label_str
= mpls_label2str(
3799 nexthop
->nh_label
->num_labels
,
3800 &nexthop
->nh_label
->label
[0],
3801 buf
, sizeof(buf
), 1);
3803 out_label_str
= "-";
3805 ttable_add_row(tt
, "%u|%s|%s|%s",
3807 nhlfe_type2str(nhlfe
->type
),
3808 nh_buf
, out_label_str
);
3812 /* Dump the generated table. */
3813 if (tt
->nrows
> 1) {
3814 char *table
= ttable_dump(tt
, "\n");
3815 vty_out(vty
, "%s\n", table
);
3816 XFREE(MTYPE_TMP
, table
);
3821 list_delete(&lsp_list
);
3825 * Create printable string for static LSP configuration.
3827 static char *nhlfe_config_str(const struct zebra_nhlfe
*nhlfe
, char *buf
,
3830 const struct nexthop
*nh
;
3832 nh
= nhlfe
->nexthop
;
3836 case NEXTHOP_TYPE_IPV4
:
3837 case NEXTHOP_TYPE_IPV4_IFINDEX
:
3838 inet_ntop(AF_INET
, &nh
->gate
.ipv4
, buf
, size
);
3840 strlcat(buf
, ifindex2ifname(nh
->ifindex
, VRF_DEFAULT
),
3843 case NEXTHOP_TYPE_IPV6
:
3844 case NEXTHOP_TYPE_IPV6_IFINDEX
:
3845 inet_ntop(AF_INET6
, &nh
->gate
.ipv6
, buf
, size
);
3848 ifindex2ifname(nh
->ifindex
, VRF_DEFAULT
),
3851 case NEXTHOP_TYPE_IFINDEX
:
3854 ifindex2ifname(nh
->ifindex
, VRF_DEFAULT
),
3857 case NEXTHOP_TYPE_BLACKHOLE
:
3865 * Display MPLS LSP configuration of all static LSPs (VTY command handler).
3867 int zebra_mpls_write_lsp_config(struct vty
*vty
, struct zebra_vrf
*zvrf
)
3869 struct zebra_lsp
*lsp
;
3870 struct zebra_nhlfe
*nhlfe
;
3872 struct listnode
*node
;
3873 struct list
*slsp_list
=
3874 hash_get_sorted_list(zvrf
->slsp_table
, lsp_cmp
);
3876 for (ALL_LIST_ELEMENTS_RO(slsp_list
, node
, lsp
)) {
3877 frr_each(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
3881 nh
= nhlfe
->nexthop
;
3882 if (nh
== NULL
|| nh
->nh_label
== NULL
)
3885 nhlfe_config_str(nhlfe
, buf
, sizeof(buf
));
3887 switch (nh
->nh_label
->label
[0]) {
3888 case MPLS_LABEL_IPV4_EXPLICIT_NULL
:
3889 case MPLS_LABEL_IPV6_EXPLICIT_NULL
:
3890 strlcpy(lstr
, "explicit-null", sizeof(lstr
));
3892 case MPLS_LABEL_IMPLICIT_NULL
:
3893 strlcpy(lstr
, "implicit-null", sizeof(lstr
));
3896 snprintf(lstr
, sizeof(lstr
), "%u",
3897 nh
->nh_label
->label
[0]);
3901 vty_out(vty
, "mpls lsp %u %s %s\n", lsp
->ile
.in_label
,
3906 list_delete(&slsp_list
);
3907 return (zvrf
->slsp_table
->count
? 1 : 0);
3911 * Add/update global label block.
3913 int zebra_mpls_label_block_add(struct zebra_vrf
*zvrf
, uint32_t start_label
,
3916 zvrf
->mpls_srgb
.start_label
= start_label
;
3917 zvrf
->mpls_srgb
.end_label
= end_label
;
3919 /* Evaluate registered FECs to see if any get a label or not. */
3925 * Delete global label block.
3927 int zebra_mpls_label_block_del(struct zebra_vrf
*zvrf
)
3929 zvrf
->mpls_srgb
.start_label
= MPLS_DEFAULT_MIN_SRGB_LABEL
;
3930 zvrf
->mpls_srgb
.end_label
= MPLS_DEFAULT_MAX_SRGB_LABEL
;
3932 /* Process registered FECs to clear their local label, if needed. */
3938 * Display MPLS global label block configuration (VTY command handler).
3940 int zebra_mpls_write_label_block_config(struct vty
*vty
, struct zebra_vrf
*zvrf
)
3942 if (zvrf
->mpls_srgb
.start_label
== 0)
3945 if ((zvrf
->mpls_srgb
.start_label
!= MPLS_DEFAULT_MIN_SRGB_LABEL
)
3946 || (zvrf
->mpls_srgb
.end_label
!= MPLS_DEFAULT_MAX_SRGB_LABEL
)) {
3947 vty_out(vty
, "mpls label global-block %u %u\n",
3948 zvrf
->mpls_srgb
.start_label
, zvrf
->mpls_srgb
.end_label
);
3955 * Called when VRF becomes inactive, cleans up information but keeps
3958 void zebra_mpls_cleanup_tables(struct zebra_vrf
*zvrf
)
3960 struct zebra_vrf
*def_zvrf
;
3963 if (zvrf_id(zvrf
) == VRF_DEFAULT
)
3964 hash_iterate(zvrf
->lsp_table
, lsp_uninstall_from_kernel
, NULL
);
3967 * For other vrfs, we try to remove associated LSPs; we locate
3968 * the LSPs in the default vrf.
3970 def_zvrf
= zebra_vrf_lookup_by_id(VRF_DEFAULT
);
3972 /* At shutdown, the default may be gone already */
3973 if (def_zvrf
== NULL
)
3976 for (afi
= AFI_IP
; afi
< AFI_MAX
; afi
++) {
3977 if (zvrf
->label
[afi
] != MPLS_LABEL_NONE
)
3978 lsp_uninstall(def_zvrf
, zvrf
->label
[afi
]);
3984 * When a vrf label is assigned and the client goes away
3985 * we should cleanup the vrf labels associated with
3988 void zebra_mpls_client_cleanup_vrf_label(uint8_t proto
)
3991 struct zebra_vrf
*def_zvrf
= zebra_vrf_lookup_by_id(VRF_DEFAULT
);
3993 if (def_zvrf
== NULL
)
3996 RB_FOREACH (vrf
, vrf_id_head
, &vrfs_by_id
) {
3997 struct zebra_vrf
*zvrf
= vrf
->info
;
4003 for (afi
= AFI_IP
; afi
< AFI_MAX
; afi
++) {
4004 if (zvrf
->label_proto
[afi
] == proto
4005 && zvrf
->label
[afi
] != MPLS_LABEL_NONE
)
4006 lsp_uninstall(def_zvrf
, zvrf
->label
[afi
]);
4009 * Cleanup data structures by fiat
4011 zvrf
->label_proto
[afi
] = 0;
4012 zvrf
->label
[afi
] = MPLS_LABEL_NONE
;
4017 static void lsp_table_free(void *p
)
4019 struct zebra_lsp
*lsp
= p
;
4021 lsp_free_nhlfe(lsp
);
4023 XFREE(MTYPE_LSP
, lsp
);
4027 * Called upon process exiting, need to delete LSP forwarding
4028 * entries from the kernel.
4029 * NOTE: Currently supported only for default VRF.
4031 void zebra_mpls_close_tables(struct zebra_vrf
*zvrf
)
4033 hash_iterate(zvrf
->lsp_table
, lsp_uninstall_from_kernel
, NULL
);
4034 hash_clean(zvrf
->lsp_table
, lsp_table_free
);
4035 hash_free(zvrf
->lsp_table
);
4036 hash_clean(zvrf
->slsp_table
, lsp_table_free
);
4037 hash_free(zvrf
->slsp_table
);
4038 route_table_finish(zvrf
->fec_table
[AFI_IP
]);
4039 route_table_finish(zvrf
->fec_table
[AFI_IP6
]);
4043 * Allocate MPLS tables for this VRF and do other initialization.
4044 * NOTE: Currently supported only for default VRF.
4046 void zebra_mpls_init_tables(struct zebra_vrf
*zvrf
)
4053 snprintf(buffer
, sizeof(buffer
), "ZEBRA SLSP table: %s",
4055 zvrf
->slsp_table
= hash_create_size(8, label_hash
, label_cmp
, buffer
);
4057 snprintf(buffer
, sizeof(buffer
), "ZEBRA LSP table: %s",
4059 zvrf
->lsp_table
= hash_create_size(8, label_hash
, label_cmp
, buffer
);
4060 zvrf
->fec_table
[AFI_IP
] = route_table_init();
4061 zvrf
->fec_table
[AFI_IP6
] = route_table_init();
4062 zvrf
->mpls_flags
= 0;
4063 zvrf
->mpls_srgb
.start_label
= MPLS_DEFAULT_MIN_SRGB_LABEL
;
4064 zvrf
->mpls_srgb
.end_label
= MPLS_DEFAULT_MAX_SRGB_LABEL
;
4068 * Global MPLS initialization.
4070 void zebra_mpls_init(void)
4073 mpls_pw_reach_strict
= false;
4075 if (mpls_kernel_init() < 0) {
4076 flog_warn(EC_ZEBRA_MPLS_SUPPORT_DISABLED
,
4077 "Disabling MPLS support (no kernel support)");
4081 if (!mpls_processq_init())
4084 hook_register(zserv_client_close
, zebra_mpls_cleanup_fecs_for_client
);
4085 hook_register(zserv_client_close
, zebra_mpls_cleanup_zclient_labels
);