1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (C) 2013 Cumulus Networks, Inc.
14 #include "sockunion.h"
17 #include "workqueue.h"
22 #include "termtable.h"
25 #include "zebra/rib.h"
27 #include "zebra/interface.h"
28 #include "zebra/zserv.h"
29 #include "zebra/zebra_router.h"
30 #include "zebra/redistribute.h"
31 #include "zebra/debug.h"
32 #include "zebra/zebra_vrf.h"
33 #include "zebra/zebra_mpls.h"
34 #include "zebra/zebra_srte.h"
35 #include "zebra/zebra_errors.h"
37 DEFINE_MTYPE_STATIC(ZEBRA
, LSP
, "MPLS LSP object");
38 DEFINE_MTYPE_STATIC(ZEBRA
, FEC
, "MPLS FEC object");
39 DEFINE_MTYPE_STATIC(ZEBRA
, NHLFE
, "MPLS nexthop object");
42 bool mpls_pw_reach_strict
; /* Strict reachability checking */
44 /* static function declarations */
46 static void fec_evaluate(struct zebra_vrf
*zvrf
);
47 static uint32_t fec_derive_label_from_index(struct zebra_vrf
*vrf
,
48 struct zebra_fec
*fec
);
49 static int lsp_install(struct zebra_vrf
*zvrf
, mpls_label_t label
,
50 struct route_node
*rn
, struct route_entry
*re
);
51 static int lsp_uninstall(struct zebra_vrf
*zvrf
, mpls_label_t label
);
52 static int fec_change_update_lsp(struct zebra_vrf
*zvrf
, struct zebra_fec
*fec
,
53 mpls_label_t old_label
);
54 static int fec_send(struct zebra_fec
*fec
, struct zserv
*client
);
55 static void fec_update_clients(struct zebra_fec
*fec
);
56 static void fec_print(struct zebra_fec
*fec
, struct vty
*vty
);
57 static struct zebra_fec
*fec_find(struct route_table
*table
, struct prefix
*p
);
58 static struct zebra_fec
*fec_add(struct route_table
*table
, struct prefix
*p
,
59 mpls_label_t label
, uint32_t flags
,
60 uint32_t label_index
);
61 static int fec_del(struct zebra_fec
*fec
);
63 static unsigned int label_hash(const void *p
);
64 static bool label_cmp(const void *p1
, const void *p2
);
65 static int nhlfe_nexthop_active_ipv4(struct zebra_nhlfe
*nhlfe
,
66 struct nexthop
*nexthop
);
67 static int nhlfe_nexthop_active_ipv6(struct zebra_nhlfe
*nhlfe
,
68 struct nexthop
*nexthop
);
69 static int nhlfe_nexthop_active(struct zebra_nhlfe
*nhlfe
);
71 static void lsp_select_best_nhlfe(struct zebra_lsp
*lsp
);
72 static void lsp_uninstall_from_kernel(struct hash_bucket
*bucket
, void *ctxt
);
73 static void lsp_schedule(struct hash_bucket
*bucket
, void *ctxt
);
74 static wq_item_status
lsp_process(struct work_queue
*wq
, void *data
);
75 static void lsp_processq_del(struct work_queue
*wq
, void *data
);
76 static void lsp_processq_complete(struct work_queue
*wq
);
77 static int lsp_processq_add(struct zebra_lsp
*lsp
);
78 static void *lsp_alloc(void *p
);
80 /* Check whether lsp can be freed - no nhlfes, e.g., and call free api */
81 static void lsp_check_free(struct hash
*lsp_table
, struct zebra_lsp
**plsp
);
83 /* Free lsp; sets caller's pointer to NULL */
84 static void lsp_free(struct hash
*lsp_table
, struct zebra_lsp
**plsp
);
86 static char *nhlfe2str(const struct zebra_nhlfe
*nhlfe
, char *buf
, int size
);
87 static char *nhlfe_config_str(const struct zebra_nhlfe
*nhlfe
, char *buf
,
89 static int nhlfe_nhop_match(struct zebra_nhlfe
*nhlfe
,
90 enum nexthop_types_t gtype
,
91 const union g_addr
*gate
, ifindex_t ifindex
);
92 static struct zebra_nhlfe
*nhlfe_find(struct nhlfe_list_head
*list
,
93 enum lsp_types_t lsp_type
,
94 enum nexthop_types_t gtype
,
95 const union g_addr
*gate
,
97 static struct zebra_nhlfe
*
98 nhlfe_add(struct zebra_lsp
*lsp
, enum lsp_types_t lsp_type
,
99 enum nexthop_types_t gtype
, const union g_addr
*gate
,
100 ifindex_t ifindex
, uint8_t num_labels
, const mpls_label_t
*labels
,
102 static int nhlfe_del(struct zebra_nhlfe
*nhlfe
);
103 static void nhlfe_free(struct zebra_nhlfe
*nhlfe
);
104 static void nhlfe_out_label_update(struct zebra_nhlfe
*nhlfe
,
105 struct mpls_label_stack
*nh_label
);
106 static int mpls_lsp_uninstall_all(struct hash
*lsp_table
, struct zebra_lsp
*lsp
,
107 enum lsp_types_t type
);
108 static int mpls_static_lsp_uninstall_all(struct zebra_vrf
*zvrf
,
109 mpls_label_t in_label
);
110 static void nhlfe_print(struct zebra_nhlfe
*nhlfe
, struct vty
*vty
,
112 static void lsp_print(struct vty
*vty
, struct zebra_lsp
*lsp
);
113 static void mpls_lsp_uninstall_all_type(struct hash_bucket
*bucket
, void *ctxt
);
114 static void mpls_ftn_uninstall_all(struct zebra_vrf
*zvrf
,
115 int afi
, enum lsp_types_t lsp_type
);
116 static int lsp_znh_install(struct zebra_lsp
*lsp
, enum lsp_types_t type
,
117 const struct zapi_nexthop
*znh
);
118 static int lsp_backup_znh_install(struct zebra_lsp
*lsp
, enum lsp_types_t type
,
119 const struct zapi_nexthop
*znh
);
121 /* Static functions */
124 * Handle failure in LSP install, clear flags for NHLFE.
126 static void clear_nhlfe_installed(struct zebra_lsp
*lsp
)
128 struct zebra_nhlfe
*nhlfe
;
129 struct nexthop
*nexthop
;
131 frr_each_safe(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
132 nexthop
= nhlfe
->nexthop
;
136 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
);
137 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
140 frr_each_safe(nhlfe_list
, &lsp
->backup_nhlfe_list
, nhlfe
) {
141 nexthop
= nhlfe
->nexthop
;
145 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
);
146 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
151 * Install label forwarding entry based on labeled-route entry.
153 static int lsp_install(struct zebra_vrf
*zvrf
, mpls_label_t label
,
154 struct route_node
*rn
, struct route_entry
*re
)
156 struct hash
*lsp_table
;
157 struct zebra_ile tmp_ile
;
158 struct zebra_lsp
*lsp
;
159 struct zebra_nhlfe
*nhlfe
;
160 struct nexthop
*nexthop
;
161 enum lsp_types_t lsp_type
;
166 lsp_table
= zvrf
->lsp_table
;
170 lsp_type
= lsp_type_from_re_type(re
->type
);
173 /* Locate or allocate LSP entry. */
174 tmp_ile
.in_label
= label
;
175 lsp
= hash_get(lsp_table
, &tmp_ile
, lsp_alloc
);
177 /* For each active nexthop, create NHLFE. Note that we deliberately skip
178 * recursive nexthops right now, because intermediate hops won't
180 * the label advertised by the recursive nexthop (plus we don't have the
181 * logic yet to push multiple labels).
183 for (nexthop
= re
->nhe
->nhg
.nexthop
;
184 nexthop
; nexthop
= nexthop
->next
) {
185 /* Skip inactive and recursive entries. */
186 if (!CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
))
188 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_RECURSIVE
))
191 nhlfe
= nhlfe_find(&lsp
->nhlfe_list
, lsp_type
,
192 nexthop
->type
, &nexthop
->gate
,
195 /* Clear deleted flag (in case it was set) */
196 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
);
197 if (nexthop_labels_match(nhlfe
->nexthop
, nexthop
))
202 if (IS_ZEBRA_DEBUG_MPLS
) {
203 nhlfe2str(nhlfe
, buf
, BUFSIZ
);
205 "LSP in-label %u type %d nexthop %s out-label changed",
206 lsp
->ile
.in_label
, lsp_type
, buf
);
209 /* Update out label, trigger processing. */
210 nhlfe_out_label_update(nhlfe
, nexthop
->nh_label
);
211 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_CHANGED
);
214 /* Add LSP entry to this nexthop */
215 nhlfe
= nhlfe_add(lsp
, lsp_type
, nexthop
->type
,
216 &nexthop
->gate
, nexthop
->ifindex
,
217 nexthop
->nh_label
->num_labels
,
218 nexthop
->nh_label
->label
,
223 if (IS_ZEBRA_DEBUG_MPLS
) {
224 nhlfe2str(nhlfe
, buf
, BUFSIZ
);
226 "Add LSP in-label %u type %d nexthop %s out-label %u",
227 lsp
->ile
.in_label
, lsp_type
, buf
,
228 nexthop
->nh_label
->label
[0]);
231 lsp
->addr_family
= NHLFE_FAMILY(nhlfe
);
233 /* Mark NHLFE as changed. */
234 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_CHANGED
);
239 /* Queue LSP for processing if necessary. If no NHLFE got added (special
240 * case), delete the LSP entry; this case results in somewhat ugly
243 if (added
|| changed
) {
244 if (lsp_processq_add(lsp
))
247 lsp_check_free(lsp_table
, &lsp
);
254 * Uninstall all non-static NHLFEs of a label forwarding entry. If all
255 * NHLFEs are removed, the entire entry is deleted.
257 static int lsp_uninstall(struct zebra_vrf
*zvrf
, mpls_label_t label
)
259 struct hash
*lsp_table
;
260 struct zebra_ile tmp_ile
;
261 struct zebra_lsp
*lsp
;
262 struct zebra_nhlfe
*nhlfe
;
266 lsp_table
= zvrf
->lsp_table
;
270 /* If entry is not present, exit. */
271 tmp_ile
.in_label
= label
;
272 lsp
= hash_lookup(lsp_table
, &tmp_ile
);
273 if (!lsp
|| (nhlfe_list_first(&lsp
->nhlfe_list
) == NULL
))
276 /* Mark NHLFEs for delete or directly delete, as appropriate. */
277 frr_each_safe(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
279 /* Skip static NHLFEs */
280 if (nhlfe
->type
== ZEBRA_LSP_STATIC
)
283 if (IS_ZEBRA_DEBUG_MPLS
) {
284 nhlfe2str(nhlfe
, buf
, BUFSIZ
);
286 "Del LSP in-label %u type %d nexthop %s flags 0x%x",
287 label
, nhlfe
->type
, buf
, nhlfe
->flags
);
290 if (CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_SELECTED
)) {
291 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_CHANGED
);
292 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
);
298 /* Queue LSP for processing, if needed, else delete. */
299 if (CHECK_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
)) {
300 if (lsp_processq_add(lsp
))
303 lsp_check_free(lsp_table
, &lsp
);
310 * This function is invoked upon change to label block configuration; it
311 * will walk all registered FECs with label-index and appropriately update
312 * their local labels and trigger client updates.
314 static void fec_evaluate(struct zebra_vrf
*zvrf
)
316 struct route_node
*rn
;
317 struct zebra_fec
*fec
;
318 uint32_t old_label
, new_label
;
321 for (af
= AFI_IP
; af
< AFI_MAX
; af
++) {
322 if (zvrf
->fec_table
[af
] == NULL
)
325 for (rn
= route_top(zvrf
->fec_table
[af
]); rn
;
326 rn
= route_next(rn
)) {
327 if ((fec
= rn
->info
) == NULL
)
330 /* Skip configured FECs and those without a label index.
332 if (fec
->flags
& FEC_FLAG_CONFIGURED
333 || fec
->label_index
== MPLS_INVALID_LABEL_INDEX
)
336 /* Save old label, determine new label. */
337 old_label
= fec
->label
;
339 zvrf
->mpls_srgb
.start_label
+ fec
->label_index
;
340 if (new_label
>= zvrf
->mpls_srgb
.end_label
)
341 new_label
= MPLS_INVALID_LABEL
;
343 /* If label has changed, update FEC and clients. */
344 if (new_label
== old_label
)
347 if (IS_ZEBRA_DEBUG_MPLS
)
349 "Update fec %pRN new label %u upon label block",
352 fec
->label
= new_label
;
353 fec_update_clients(fec
);
355 /* Update label forwarding entries appropriately */
356 fec_change_update_lsp(zvrf
, fec
, old_label
);
362 * Derive (if possible) and update the local label for the FEC based on
363 * its label index. The index is "acceptable" if it falls within the
364 * globally configured label block (SRGB).
366 static uint32_t fec_derive_label_from_index(struct zebra_vrf
*zvrf
,
367 struct zebra_fec
*fec
)
371 if (fec
->label_index
!= MPLS_INVALID_LABEL_INDEX
372 && zvrf
->mpls_srgb
.start_label
373 && ((label
= zvrf
->mpls_srgb
.start_label
+ fec
->label_index
)
374 < zvrf
->mpls_srgb
.end_label
))
377 fec
->label
= MPLS_INVALID_LABEL
;
383 * There is a change for this FEC. Install or uninstall label forwarding
384 * entries, as appropriate.
386 static int fec_change_update_lsp(struct zebra_vrf
*zvrf
, struct zebra_fec
*fec
,
387 mpls_label_t old_label
)
389 struct route_table
*table
;
390 struct route_node
*rn
;
391 struct route_entry
*re
;
394 /* Uninstall label forwarding entry, if previously installed. */
395 if (old_label
!= MPLS_INVALID_LABEL
396 && old_label
!= MPLS_LABEL_IMPLICIT_NULL
)
397 lsp_uninstall(zvrf
, old_label
);
399 /* Install label forwarding entry corr. to new label, if needed. */
400 if (fec
->label
== MPLS_INVALID_LABEL
401 || fec
->label
== MPLS_LABEL_IMPLICIT_NULL
)
404 afi
= family2afi(PREFIX_FAMILY(&fec
->rn
->p
));
405 table
= zebra_vrf_table(afi
, SAFI_UNICAST
, zvrf_id(zvrf
));
409 /* See if labeled route exists. */
410 rn
= route_node_lookup(table
, &fec
->rn
->p
);
414 RNODE_FOREACH_RE (rn
, re
) {
415 if (CHECK_FLAG(re
->flags
, ZEBRA_FLAG_SELECTED
))
419 if (!re
|| !zebra_rib_labeled_unicast(re
))
422 if (lsp_install(zvrf
, fec
->label
, rn
, re
))
429 * Inform about FEC to a registered client.
431 static int fec_send(struct zebra_fec
*fec
, struct zserv
*client
)
434 struct route_node
*rn
;
438 /* Get output stream. */
439 s
= stream_new(ZEBRA_MAX_PACKET_SIZ
);
441 zclient_create_header(s
, ZEBRA_FEC_UPDATE
, VRF_DEFAULT
);
443 stream_putw(s
, rn
->p
.family
);
444 stream_put_prefix(s
, &rn
->p
);
445 stream_putl(s
, fec
->label
);
446 stream_putw_at(s
, 0, stream_get_endp(s
));
447 return zserv_send_message(client
, s
);
451 * Update all registered clients about this FEC. Caller should've updated
452 * FEC and ensure no duplicate updates.
454 static void fec_update_clients(struct zebra_fec
*fec
)
456 struct listnode
*node
;
457 struct zserv
*client
;
459 for (ALL_LIST_ELEMENTS_RO(fec
->client_list
, node
, client
)) {
460 if (IS_ZEBRA_DEBUG_MPLS
)
461 zlog_debug("Update client %s",
462 zebra_route_string(client
->proto
));
463 fec_send(fec
, client
);
469 * Print a FEC-label binding entry.
471 static void fec_print(struct zebra_fec
*fec
, struct vty
*vty
)
473 struct route_node
*rn
;
474 struct listnode
*node
;
475 struct zserv
*client
;
479 vty_out(vty
, "%pRN\n", rn
);
480 vty_out(vty
, " Label: %s", label2str(fec
->label
, 0, buf
, BUFSIZ
));
481 if (fec
->label_index
!= MPLS_INVALID_LABEL_INDEX
)
482 vty_out(vty
, ", Label Index: %u", fec
->label_index
);
484 if (!list_isempty(fec
->client_list
)) {
485 vty_out(vty
, " Client list:");
486 for (ALL_LIST_ELEMENTS_RO(fec
->client_list
, node
, client
))
487 vty_out(vty
, " %s(fd %d)",
488 zebra_route_string(client
->proto
),
495 * Locate FEC-label binding that matches with passed info.
497 static struct zebra_fec
*fec_find(struct route_table
*table
, struct prefix
*p
)
499 struct route_node
*rn
;
502 rn
= route_node_lookup(table
, p
);
506 route_unlock_node(rn
);
511 * Add a FEC. This may be upon a client registering for a binding
512 * or when a binding is configured.
514 static struct zebra_fec
*fec_add(struct route_table
*table
, struct prefix
*p
,
515 mpls_label_t label
, uint32_t flags
,
516 uint32_t label_index
)
518 struct route_node
*rn
;
519 struct zebra_fec
*fec
;
523 /* Lookup (or add) route node.*/
524 rn
= route_node_get(table
, p
);
531 fec
= XCALLOC(MTYPE_FEC
, sizeof(struct zebra_fec
));
536 fec
->client_list
= list_new();
538 route_unlock_node(rn
); /* for the route_node_get */
540 fec
->label_index
= label_index
;
547 * Delete a FEC. This may be upon the last client deregistering for
548 * a FEC and no binding exists or when the binding is deleted and there
549 * are no registered clients.
551 static int fec_del(struct zebra_fec
*fec
)
553 list_delete(&fec
->client_list
);
554 fec
->rn
->info
= NULL
;
555 route_unlock_node(fec
->rn
);
556 XFREE(MTYPE_FEC
, fec
);
561 * Hash function for label.
563 static unsigned int label_hash(const void *p
)
565 const struct zebra_ile
*ile
= p
;
567 return (jhash_1word(ile
->in_label
, 0));
571 * Compare 2 LSP hash entries based on in-label.
573 static bool label_cmp(const void *p1
, const void *p2
)
575 const struct zebra_ile
*ile1
= p1
;
576 const struct zebra_ile
*ile2
= p2
;
578 return (ile1
->in_label
== ile2
->in_label
);
582 * Check if an IPv4 nexthop for a NHLFE is active. Update nexthop based on
584 * NOTE: Looking only for connected routes right now.
586 static int nhlfe_nexthop_active_ipv4(struct zebra_nhlfe
*nhlfe
,
587 struct nexthop
*nexthop
)
589 struct route_table
*table
;
590 struct prefix_ipv4 p
;
591 struct route_node
*rn
;
592 struct route_entry
*match
;
593 struct nexthop
*match_nh
;
595 table
= zebra_vrf_table(AFI_IP
, SAFI_UNICAST
, nexthop
->vrf_id
);
599 /* Lookup nexthop in IPv4 routing table. */
600 memset(&p
, 0, sizeof(p
));
602 p
.prefixlen
= IPV4_MAX_BITLEN
;
603 p
.prefix
= nexthop
->gate
.ipv4
;
605 rn
= route_node_match(table
, (struct prefix
*)&p
);
609 route_unlock_node(rn
);
611 /* Locate a valid connected route. */
612 RNODE_FOREACH_RE (rn
, match
) {
613 if (CHECK_FLAG(match
->status
, ROUTE_ENTRY_REMOVED
)
614 || !CHECK_FLAG(match
->flags
, ZEBRA_FLAG_SELECTED
))
617 for (match_nh
= match
->nhe
->nhg
.nexthop
; match_nh
;
618 match_nh
= match_nh
->next
) {
619 if (match
->type
== ZEBRA_ROUTE_CONNECT
620 || nexthop
->ifindex
== match_nh
->ifindex
) {
621 nexthop
->ifindex
= match_nh
->ifindex
;
632 * Check if an IPv6 nexthop for a NHLFE is active. Update nexthop based on
634 * NOTE: Looking only for connected routes right now.
636 static int nhlfe_nexthop_active_ipv6(struct zebra_nhlfe
*nhlfe
,
637 struct nexthop
*nexthop
)
639 struct route_table
*table
;
640 struct prefix_ipv6 p
;
641 struct route_node
*rn
;
642 struct route_entry
*match
;
644 table
= zebra_vrf_table(AFI_IP6
, SAFI_UNICAST
, nexthop
->vrf_id
);
648 /* Lookup nexthop in IPv6 routing table. */
649 memset(&p
, 0, sizeof(p
));
651 p
.prefixlen
= IPV6_MAX_BITLEN
;
652 p
.prefix
= nexthop
->gate
.ipv6
;
654 rn
= route_node_match(table
, (struct prefix
*)&p
);
658 route_unlock_node(rn
);
660 /* Locate a valid connected route. */
661 RNODE_FOREACH_RE (rn
, match
) {
662 if ((match
->type
== ZEBRA_ROUTE_CONNECT
)
663 && !CHECK_FLAG(match
->status
, ROUTE_ENTRY_REMOVED
)
664 && CHECK_FLAG(match
->flags
, ZEBRA_FLAG_SELECTED
))
668 if (!match
|| !match
->nhe
->nhg
.nexthop
)
671 nexthop
->ifindex
= match
->nhe
->nhg
.nexthop
->ifindex
;
677 * Check the nexthop reachability for a NHLFE and return if valid (reachable)
679 * NOTE: Each NHLFE points to only 1 nexthop.
681 static int nhlfe_nexthop_active(struct zebra_nhlfe
*nhlfe
)
683 struct nexthop
*nexthop
;
684 struct interface
*ifp
;
685 struct zebra_ns
*zns
;
687 nexthop
= nhlfe
->nexthop
;
688 if (!nexthop
) // unexpected
691 /* Check on nexthop based on type. */
692 switch (nexthop
->type
) {
693 case NEXTHOP_TYPE_IFINDEX
:
695 * Lookup if this type is special. The
696 * NEXTHOP_TYPE_IFINDEX is a pop and
697 * forward into a different table for
698 * processing. As such this ifindex
699 * passed to us may be a VRF device
700 * which will not be in the default
701 * VRF. So let's look in all of them
703 zns
= zebra_ns_lookup(NS_DEFAULT
);
704 ifp
= if_lookup_by_index_per_ns(zns
, nexthop
->ifindex
);
705 if (ifp
&& if_is_operative(ifp
))
706 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
708 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
710 case NEXTHOP_TYPE_IPV4
:
711 case NEXTHOP_TYPE_IPV4_IFINDEX
:
712 if (nhlfe_nexthop_active_ipv4(nhlfe
, nexthop
))
713 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
715 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
718 case NEXTHOP_TYPE_IPV6
:
719 if (nhlfe_nexthop_active_ipv6(nhlfe
, nexthop
))
720 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
722 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
725 case NEXTHOP_TYPE_IPV6_IFINDEX
:
726 if (IN6_IS_ADDR_LINKLOCAL(&nexthop
->gate
.ipv6
)) {
727 ifp
= if_lookup_by_index(nexthop
->ifindex
,
729 if (ifp
&& if_is_operative(ifp
))
730 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
732 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
734 if (nhlfe_nexthop_active_ipv6(nhlfe
, nexthop
))
735 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
737 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
741 case NEXTHOP_TYPE_BLACKHOLE
:
745 return CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
749 * Walk through NHLFEs for a LSP forwarding entry, verify nexthop
750 * reachability and select the best. Multipath entries are also
751 * marked. This is invoked when an LSP scheduled for processing (due
752 * to some change) is examined.
754 static void lsp_select_best_nhlfe(struct zebra_lsp
*lsp
)
756 struct zebra_nhlfe
*nhlfe
;
757 struct zebra_nhlfe
*best
;
758 struct nexthop
*nexthop
;
766 UNSET_FLAG(lsp
->flags
, LSP_FLAG_CHANGED
);
769 * First compute the best path, after checking nexthop status. We are
770 * only concerned with non-deleted NHLFEs.
772 frr_each_safe(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
773 /* Clear selection flags. */
774 UNSET_FLAG(nhlfe
->flags
,
775 (NHLFE_FLAG_SELECTED
| NHLFE_FLAG_MULTIPATH
));
777 if (!CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
)
778 && nhlfe_nexthop_active(nhlfe
)) {
779 if (!best
|| (nhlfe
->distance
< best
->distance
))
784 lsp
->best_nhlfe
= best
;
785 if (!lsp
->best_nhlfe
)
789 * Check the active status of backup nhlfes also
791 frr_each_safe(nhlfe_list
, &lsp
->backup_nhlfe_list
, nhlfe
) {
792 if (!CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
))
793 (void)nhlfe_nexthop_active(nhlfe
);
796 /* Mark best NHLFE as selected. */
797 SET_FLAG(lsp
->best_nhlfe
->flags
, NHLFE_FLAG_SELECTED
);
800 * If best path exists, see if there is ECMP. While doing this, note if
802 * new (uninstalled) NHLFE has been selected, an installed entry that is
803 * still selected has a change or an installed entry is to be removed.
805 frr_each(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
806 int nh_chg
, nh_sel
, nh_inst
;
808 nexthop
= nhlfe
->nexthop
;
809 if (!nexthop
) // unexpected
812 if (!CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
)
813 && CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
)
814 && (nhlfe
->distance
== lsp
->best_nhlfe
->distance
)) {
815 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_SELECTED
);
816 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_MULTIPATH
);
820 if (CHECK_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
) && !changed
) {
821 nh_chg
= CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_CHANGED
);
822 nh_sel
= CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_SELECTED
);
824 CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
);
826 if ((nh_sel
&& !nh_inst
)
827 || (nh_sel
&& nh_inst
&& nh_chg
)
828 || (nh_inst
&& !nh_sel
))
832 /* We have finished examining, clear changed flag. */
833 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_CHANGED
);
837 SET_FLAG(lsp
->flags
, LSP_FLAG_CHANGED
);
841 * Delete LSP forwarding entry from kernel, if installed. Called upon
844 static void lsp_uninstall_from_kernel(struct hash_bucket
*bucket
, void *ctxt
)
846 struct zebra_lsp
*lsp
;
848 lsp
= (struct zebra_lsp
*)bucket
->data
;
849 if (CHECK_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
))
850 (void)dplane_lsp_delete(lsp
);
854 * Schedule LSP forwarding entry for processing. Called upon changes
855 * that may impact LSPs such as nexthop / connected route changes.
857 static void lsp_schedule(struct hash_bucket
*bucket
, void *ctxt
)
859 struct zebra_lsp
*lsp
;
861 lsp
= (struct zebra_lsp
*)bucket
->data
;
863 /* In the common flow, this is used when external events occur. For
864 * LSPs with backup nhlfes, we'll assume that the forwarding
865 * plane will use the backups to handle these events, until the
866 * owning protocol can react.
869 /* Skip LSPs with backups */
870 if (nhlfe_list_first(&lsp
->backup_nhlfe_list
) != NULL
) {
871 if (IS_ZEBRA_DEBUG_MPLS_DETAIL
)
872 zlog_debug("%s: skip LSP in-label %u",
873 __func__
, lsp
->ile
.in_label
);
878 (void)lsp_processq_add(lsp
);
882 * Process a LSP entry that is in the queue. Recalculate best NHLFE and
883 * any multipaths and update or delete from the kernel, as needed.
885 static wq_item_status
lsp_process(struct work_queue
*wq
, void *data
)
887 struct zebra_lsp
*lsp
;
888 struct zebra_nhlfe
*oldbest
, *newbest
;
889 char buf
[BUFSIZ
], buf2
[BUFSIZ
];
890 struct zebra_vrf
*zvrf
= zebra_vrf_lookup_by_id(VRF_DEFAULT
);
891 enum zebra_dplane_result res
;
893 lsp
= (struct zebra_lsp
*)data
;
894 if (!lsp
) // unexpected
897 oldbest
= lsp
->best_nhlfe
;
899 /* Select best NHLFE(s) */
900 lsp_select_best_nhlfe(lsp
);
902 newbest
= lsp
->best_nhlfe
;
904 if (IS_ZEBRA_DEBUG_MPLS
) {
906 nhlfe2str(oldbest
, buf
, sizeof(buf
));
908 nhlfe2str(newbest
, buf2
, sizeof(buf2
));
910 "Process LSP in-label %u oldbest %s newbest %s flags 0x%x ecmp# %d",
911 lsp
->ile
.in_label
, oldbest
? buf
: "NULL",
912 newbest
? buf2
: "NULL", lsp
->flags
, lsp
->num_ecmp
);
915 if (!CHECK_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
)) {
916 /* Not already installed */
919 UNSET_FLAG(lsp
->flags
, LSP_FLAG_CHANGED
);
921 switch (dplane_lsp_add(lsp
)) {
922 case ZEBRA_DPLANE_REQUEST_QUEUED
:
923 /* Set 'installed' flag so we will know
924 * that an install is in-flight.
926 SET_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
);
928 zvrf
->lsp_installs_queued
++;
930 case ZEBRA_DPLANE_REQUEST_FAILURE
:
931 flog_warn(EC_ZEBRA_LSP_INSTALL_FAILURE
,
932 "LSP Install Failure: %u",
935 case ZEBRA_DPLANE_REQUEST_SUCCESS
:
936 zvrf
->lsp_installs
++;
941 /* Installed, may need an update and/or delete. */
943 res
= dplane_lsp_delete(lsp
);
945 /* We do some of the lsp cleanup immediately for
948 UNSET_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
);
949 clear_nhlfe_installed(lsp
);
952 case ZEBRA_DPLANE_REQUEST_QUEUED
:
953 zvrf
->lsp_removals_queued
++;
955 case ZEBRA_DPLANE_REQUEST_FAILURE
:
956 flog_warn(EC_ZEBRA_LSP_DELETE_FAILURE
,
957 "LSP Deletion Failure: %u",
960 case ZEBRA_DPLANE_REQUEST_SUCCESS
:
961 zvrf
->lsp_removals
++;
964 } else if (CHECK_FLAG(lsp
->flags
, LSP_FLAG_CHANGED
)) {
965 struct zebra_nhlfe
*nhlfe
;
966 struct nexthop
*nexthop
;
968 UNSET_FLAG(lsp
->flags
, LSP_FLAG_CHANGED
);
970 /* We leave the INSTALLED flag set here
971 * so we know an update is in-flight.
975 * Any NHLFE that was installed but is not
976 * selected now needs to have its flags updated.
978 frr_each_safe(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
979 nexthop
= nhlfe
->nexthop
;
983 if (CHECK_FLAG(nhlfe
->flags
,
984 NHLFE_FLAG_INSTALLED
)
985 && !CHECK_FLAG(nhlfe
->flags
,
986 NHLFE_FLAG_SELECTED
)) {
987 UNSET_FLAG(nhlfe
->flags
,
988 NHLFE_FLAG_INSTALLED
);
989 UNSET_FLAG(nexthop
->flags
,
994 switch (dplane_lsp_update(lsp
)) {
995 case ZEBRA_DPLANE_REQUEST_QUEUED
:
996 zvrf
->lsp_installs_queued
++;
998 case ZEBRA_DPLANE_REQUEST_FAILURE
:
999 flog_warn(EC_ZEBRA_LSP_INSTALL_FAILURE
,
1000 "LSP Update Failure: %u",
1003 case ZEBRA_DPLANE_REQUEST_SUCCESS
:
1004 zvrf
->lsp_installs
++;
1015 * Callback upon processing completion of a LSP forwarding entry.
1017 static void lsp_processq_del(struct work_queue
*wq
, void *data
)
1019 struct zebra_vrf
*zvrf
;
1020 struct zebra_lsp
*lsp
;
1021 struct hash
*lsp_table
;
1022 struct zebra_nhlfe
*nhlfe
;
1024 /* If zebra is shutting down, don't delete any structs,
1025 * just ignore this callback. The LSPs will be cleaned up
1026 * during the shutdown processing.
1028 if (zebra_router_in_shutdown())
1031 zvrf
= zebra_vrf_lookup_by_id(VRF_DEFAULT
);
1034 lsp_table
= zvrf
->lsp_table
;
1035 if (!lsp_table
) // unexpected
1038 lsp
= (struct zebra_lsp
*)data
;
1039 if (!lsp
) // unexpected
1042 /* Clear flag, remove any NHLFEs marked for deletion. If no NHLFEs
1044 * delete LSP entry also.
1046 UNSET_FLAG(lsp
->flags
, LSP_FLAG_SCHEDULED
);
1048 frr_each_safe(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
1049 if (CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
))
1053 frr_each_safe(nhlfe_list
, &lsp
->backup_nhlfe_list
, nhlfe
) {
1054 if (CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
))
1058 lsp_check_free(lsp_table
, &lsp
);
1062 * Callback upon finishing the processing of all scheduled
1063 * LSP forwarding entries.
1065 static void lsp_processq_complete(struct work_queue
*wq
)
1067 /* Nothing to do for now. */
1071 * Add LSP forwarding entry to queue for subsequent processing.
1073 static int lsp_processq_add(struct zebra_lsp
*lsp
)
1075 /* If already scheduled, exit. */
1076 if (CHECK_FLAG(lsp
->flags
, LSP_FLAG_SCHEDULED
))
1079 if (zrouter
.lsp_process_q
== NULL
) {
1080 flog_err(EC_ZEBRA_WQ_NONEXISTENT
,
1081 "%s: work_queue does not exist!", __func__
);
1085 work_queue_add(zrouter
.lsp_process_q
, lsp
);
1086 SET_FLAG(lsp
->flags
, LSP_FLAG_SCHEDULED
);
1091 * Callback to allocate LSP forwarding table entry.
1093 static void *lsp_alloc(void *p
)
1095 const struct zebra_ile
*ile
= p
;
1096 struct zebra_lsp
*lsp
;
1098 lsp
= XCALLOC(MTYPE_LSP
, sizeof(struct zebra_lsp
));
1100 nhlfe_list_init(&lsp
->nhlfe_list
);
1101 nhlfe_list_init(&lsp
->backup_nhlfe_list
);
1103 if (IS_ZEBRA_DEBUG_MPLS
)
1104 zlog_debug("Alloc LSP in-label %u", lsp
->ile
.in_label
);
1106 return ((void *)lsp
);
1110 * Check whether lsp can be freed - no nhlfes, e.g., and call free api
1112 static void lsp_check_free(struct hash
*lsp_table
, struct zebra_lsp
**plsp
)
1114 struct zebra_lsp
*lsp
;
1116 if (plsp
== NULL
|| *plsp
== NULL
)
1121 if ((nhlfe_list_first(&lsp
->nhlfe_list
) == NULL
) &&
1122 (nhlfe_list_first(&lsp
->backup_nhlfe_list
) == NULL
) &&
1123 !CHECK_FLAG(lsp
->flags
, LSP_FLAG_SCHEDULED
))
1124 lsp_free(lsp_table
, plsp
);
1127 static void lsp_free_nhlfe(struct zebra_lsp
*lsp
)
1129 struct zebra_nhlfe
*nhlfe
;
1131 while ((nhlfe
= nhlfe_list_first(&lsp
->nhlfe_list
))) {
1132 nhlfe_list_del(&lsp
->nhlfe_list
, nhlfe
);
1136 while ((nhlfe
= nhlfe_list_first(&lsp
->backup_nhlfe_list
))) {
1137 nhlfe_list_del(&lsp
->backup_nhlfe_list
, nhlfe
);
1143 * Dtor for an LSP: remove from ile hash, release any internal allocations,
1146 static void lsp_free(struct hash
*lsp_table
, struct zebra_lsp
**plsp
)
1148 struct zebra_lsp
*lsp
;
1150 if (plsp
== NULL
|| *plsp
== NULL
)
1155 if (IS_ZEBRA_DEBUG_MPLS
)
1156 zlog_debug("Free LSP in-label %u flags 0x%x",
1157 lsp
->ile
.in_label
, lsp
->flags
);
1159 lsp_free_nhlfe(lsp
);
1161 hash_release(lsp_table
, &lsp
->ile
);
1162 XFREE(MTYPE_LSP
, lsp
);
1168 * Create printable string for NHLFE entry.
1170 static char *nhlfe2str(const struct zebra_nhlfe
*nhlfe
, char *buf
, int size
)
1172 const struct nexthop
*nexthop
;
1175 nexthop
= nhlfe
->nexthop
;
1176 switch (nexthop
->type
) {
1177 case NEXTHOP_TYPE_IPV4
:
1178 case NEXTHOP_TYPE_IPV4_IFINDEX
:
1179 inet_ntop(AF_INET
, &nexthop
->gate
.ipv4
, buf
, size
);
1181 case NEXTHOP_TYPE_IPV6
:
1182 case NEXTHOP_TYPE_IPV6_IFINDEX
:
1183 inet_ntop(AF_INET6
, &nexthop
->gate
.ipv6
, buf
, size
);
1185 case NEXTHOP_TYPE_IFINDEX
:
1186 snprintf(buf
, size
, "Ifindex: %u", nexthop
->ifindex
);
1187 case NEXTHOP_TYPE_BLACKHOLE
:
1195 * Check if NHLFE matches with search info passed.
1197 static int nhlfe_nhop_match(struct zebra_nhlfe
*nhlfe
,
1198 enum nexthop_types_t gtype
,
1199 const union g_addr
*gate
, ifindex_t ifindex
)
1201 struct nexthop
*nhop
;
1204 nhop
= nhlfe
->nexthop
;
1208 if (nhop
->type
!= gtype
)
1211 switch (nhop
->type
) {
1212 case NEXTHOP_TYPE_IPV4
:
1213 case NEXTHOP_TYPE_IPV4_IFINDEX
:
1214 cmp
= memcmp(&(nhop
->gate
.ipv4
), &(gate
->ipv4
),
1215 sizeof(struct in_addr
));
1216 if (!cmp
&& nhop
->type
== NEXTHOP_TYPE_IPV4_IFINDEX
)
1217 cmp
= !(nhop
->ifindex
== ifindex
);
1219 case NEXTHOP_TYPE_IPV6
:
1220 case NEXTHOP_TYPE_IPV6_IFINDEX
:
1221 cmp
= memcmp(&(nhop
->gate
.ipv6
), &(gate
->ipv6
),
1222 sizeof(struct in6_addr
));
1223 if (!cmp
&& nhop
->type
== NEXTHOP_TYPE_IPV6_IFINDEX
)
1224 cmp
= !(nhop
->ifindex
== ifindex
);
1226 case NEXTHOP_TYPE_IFINDEX
:
1227 cmp
= !(nhop
->ifindex
== ifindex
);
1229 case NEXTHOP_TYPE_BLACKHOLE
:
1238 * Locate NHLFE that matches with passed info.
1240 static struct zebra_nhlfe
*nhlfe_find(struct nhlfe_list_head
*list
,
1241 enum lsp_types_t lsp_type
,
1242 enum nexthop_types_t gtype
,
1243 const union g_addr
*gate
,
1246 struct zebra_nhlfe
*nhlfe
;
1248 frr_each_safe(nhlfe_list
, list
, nhlfe
) {
1249 if (nhlfe
->type
!= lsp_type
)
1251 if (!nhlfe_nhop_match(nhlfe
, gtype
, gate
, ifindex
))
1259 * Allocate and init new NHLFE.
1261 static struct zebra_nhlfe
*
1262 nhlfe_alloc(struct zebra_lsp
*lsp
, enum lsp_types_t lsp_type
,
1263 enum nexthop_types_t gtype
, const union g_addr
*gate
,
1264 ifindex_t ifindex
, uint8_t num_labels
, const mpls_label_t
*labels
)
1266 struct zebra_nhlfe
*nhlfe
;
1267 struct nexthop
*nexthop
;
1271 nhlfe
= XCALLOC(MTYPE_NHLFE
, sizeof(struct zebra_nhlfe
));
1274 nhlfe
->type
= lsp_type
;
1275 nhlfe
->distance
= lsp_distance(lsp_type
);
1277 nexthop
= nexthop_new();
1279 nexthop_add_labels(nexthop
, lsp_type
, num_labels
, labels
);
1281 nexthop
->vrf_id
= VRF_DEFAULT
;
1282 nexthop
->type
= gtype
;
1283 switch (nexthop
->type
) {
1284 case NEXTHOP_TYPE_IPV4
:
1285 case NEXTHOP_TYPE_IPV4_IFINDEX
:
1286 nexthop
->gate
.ipv4
= gate
->ipv4
;
1288 nexthop
->ifindex
= ifindex
;
1290 case NEXTHOP_TYPE_IPV6
:
1291 case NEXTHOP_TYPE_IPV6_IFINDEX
:
1292 nexthop
->gate
.ipv6
= gate
->ipv6
;
1294 nexthop
->ifindex
= ifindex
;
1296 case NEXTHOP_TYPE_IFINDEX
:
1297 nexthop
->ifindex
= ifindex
;
1299 case NEXTHOP_TYPE_BLACKHOLE
:
1300 if (IS_ZEBRA_DEBUG_MPLS
)
1301 zlog_debug("%s: invalid: blackhole nexthop", __func__
);
1303 nexthop_free(nexthop
);
1304 XFREE(MTYPE_NHLFE
, nhlfe
);
1307 nhlfe
->nexthop
= nexthop
;
1313 * Add primary or backup NHLFE. Base entry must have been created and
1314 * duplicate check done.
1316 static struct zebra_nhlfe
*nhlfe_add(struct zebra_lsp
*lsp
,
1317 enum lsp_types_t lsp_type
,
1318 enum nexthop_types_t gtype
,
1319 const union g_addr
*gate
,
1320 ifindex_t ifindex
, uint8_t num_labels
,
1321 const mpls_label_t
*labels
, bool is_backup
)
1323 struct zebra_nhlfe
*nhlfe
;
1328 /* Must have labels */
1329 if (num_labels
== 0 || labels
== NULL
) {
1330 if (IS_ZEBRA_DEBUG_MPLS
)
1331 zlog_debug("%s: invalid nexthop: no labels", __func__
);
1336 /* Allocate new object */
1337 nhlfe
= nhlfe_alloc(lsp
, lsp_type
, gtype
, gate
, ifindex
, num_labels
,
1343 /* Enqueue to LSP: primaries at head of list, backups at tail */
1345 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_IS_BACKUP
);
1346 nhlfe_list_add_tail(&lsp
->backup_nhlfe_list
, nhlfe
);
1348 nhlfe_list_add_head(&lsp
->nhlfe_list
, nhlfe
);
1354 * Common delete for NHLFEs.
1356 static void nhlfe_free(struct zebra_nhlfe
*nhlfe
)
1363 nexthop_free(nhlfe
->nexthop
);
1365 nhlfe
->nexthop
= NULL
;
1367 XFREE(MTYPE_NHLFE
, nhlfe
);
1372 * Disconnect NHLFE from LSP, and free. Entry must be present on LSP's list.
1374 static int nhlfe_del(struct zebra_nhlfe
*nhlfe
)
1376 struct zebra_lsp
*lsp
;
1385 if (nhlfe
== lsp
->best_nhlfe
)
1386 lsp
->best_nhlfe
= NULL
;
1388 /* Unlink from LSP */
1389 if (CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_IS_BACKUP
))
1390 nhlfe_list_del(&lsp
->backup_nhlfe_list
, nhlfe
);
1392 nhlfe_list_del(&lsp
->nhlfe_list
, nhlfe
);
1402 * Update label for NHLFE entry.
1404 static void nhlfe_out_label_update(struct zebra_nhlfe
*nhlfe
,
1405 struct mpls_label_stack
*nh_label
)
1407 nhlfe
->nexthop
->nh_label
->label
[0] = nh_label
->label
[0];
1410 static int mpls_lsp_uninstall_all(struct hash
*lsp_table
, struct zebra_lsp
*lsp
,
1411 enum lsp_types_t type
)
1413 struct zebra_nhlfe
*nhlfe
;
1414 int schedule_lsp
= 0;
1417 if (CHECK_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
))
1420 /* Mark NHLFEs for delete or directly delete, as appropriate. */
1421 frr_each_safe(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
1422 /* Skip non-static NHLFEs */
1423 if (nhlfe
->type
!= type
)
1426 if (IS_ZEBRA_DEBUG_MPLS
) {
1427 nhlfe2str(nhlfe
, buf
, sizeof(buf
));
1429 "Del LSP in-label %u type %d nexthop %s flags 0x%x",
1430 lsp
->ile
.in_label
, type
, buf
, nhlfe
->flags
);
1433 if (CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
)) {
1434 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_CHANGED
);
1435 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
);
1442 frr_each_safe(nhlfe_list
, &lsp
->backup_nhlfe_list
, nhlfe
) {
1443 /* Skip non-static NHLFEs */
1444 if (nhlfe
->type
!= type
)
1447 if (IS_ZEBRA_DEBUG_MPLS
) {
1448 nhlfe2str(nhlfe
, buf
, sizeof(buf
));
1450 "Del backup LSP in-label %u type %d nexthop %s flags 0x%x",
1451 lsp
->ile
.in_label
, type
, buf
, nhlfe
->flags
);
1454 if (CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
)) {
1455 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_CHANGED
);
1456 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
);
1463 /* Queue LSP for processing, if needed, else delete. */
1465 if (IS_ZEBRA_DEBUG_MPLS
) {
1466 zlog_debug("Schedule LSP in-label %u flags 0x%x",
1467 lsp
->ile
.in_label
, lsp
->flags
);
1469 if (lsp_processq_add(lsp
))
1472 lsp_check_free(lsp_table
, &lsp
);
1479 * Uninstall all static NHLFEs for a particular LSP forwarding entry.
1480 * If no other NHLFEs exist, the entry would be deleted.
1482 static int mpls_static_lsp_uninstall_all(struct zebra_vrf
*zvrf
,
1483 mpls_label_t in_label
)
1485 struct hash
*lsp_table
;
1486 struct zebra_ile tmp_ile
;
1487 struct zebra_lsp
*lsp
;
1490 lsp_table
= zvrf
->lsp_table
;
1494 /* If entry is not present, exit. */
1495 tmp_ile
.in_label
= in_label
;
1496 lsp
= hash_lookup(lsp_table
, &tmp_ile
);
1497 if (!lsp
|| (nhlfe_list_first(&lsp
->nhlfe_list
) == NULL
))
1500 return mpls_lsp_uninstall_all(lsp_table
, lsp
, ZEBRA_LSP_STATIC
);
1503 static json_object
*nhlfe_json(struct zebra_nhlfe
*nhlfe
)
1505 json_object
*json_nhlfe
= NULL
;
1506 json_object
*json_backups
= NULL
;
1507 json_object
*json_label_stack
;
1508 struct nexthop
*nexthop
= nhlfe
->nexthop
;
1511 json_nhlfe
= json_object_new_object();
1512 json_object_string_add(json_nhlfe
, "type", nhlfe_type2str(nhlfe
->type
));
1513 json_object_int_add(json_nhlfe
, "outLabel",
1514 nexthop
->nh_label
->label
[0]);
1516 json_label_stack
= json_object_new_array();
1517 json_object_object_add(json_nhlfe
, "outLabelStack", json_label_stack
);
1518 for (i
= 0; i
< nexthop
->nh_label
->num_labels
; i
++)
1519 json_object_array_add(
1521 json_object_new_int(nexthop
->nh_label
->label
[i
]));
1523 json_object_int_add(json_nhlfe
, "distance", nhlfe
->distance
);
1525 if (CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
))
1526 json_object_boolean_true_add(json_nhlfe
, "installed");
1528 switch (nexthop
->type
) {
1529 case NEXTHOP_TYPE_IPV4
:
1530 case NEXTHOP_TYPE_IPV4_IFINDEX
:
1531 json_object_string_addf(json_nhlfe
, "nexthop", "%pI4",
1532 &nexthop
->gate
.ipv4
);
1534 case NEXTHOP_TYPE_IPV6
:
1535 case NEXTHOP_TYPE_IPV6_IFINDEX
:
1536 json_object_string_addf(json_nhlfe
, "nexthop", "%pI6",
1537 &nexthop
->gate
.ipv6
);
1539 if (nexthop
->ifindex
)
1540 json_object_string_add(json_nhlfe
, "interface",
1541 ifindex2ifname(nexthop
->ifindex
,
1544 case NEXTHOP_TYPE_IFINDEX
:
1545 if (nexthop
->ifindex
)
1546 json_object_string_add(json_nhlfe
, "interface",
1547 ifindex2ifname(nexthop
->ifindex
,
1550 case NEXTHOP_TYPE_BLACKHOLE
:
1554 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_HAS_BACKUP
)) {
1555 json_backups
= json_object_new_array();
1556 for (i
= 0; i
< nexthop
->backup_num
; i
++) {
1557 json_object_array_add(
1559 json_object_new_int(nexthop
->backup_idx
[i
]));
1562 json_object_object_add(json_nhlfe
, "backupIndex",
1570 * Print the NHLFE for a LSP forwarding entry.
1572 static void nhlfe_print(struct zebra_nhlfe
*nhlfe
, struct vty
*vty
,
1575 struct nexthop
*nexthop
;
1576 char buf
[MPLS_LABEL_STRLEN
];
1578 nexthop
= nhlfe
->nexthop
;
1579 if (!nexthop
|| !nexthop
->nh_label
) // unexpected
1582 vty_out(vty
, " type: %s remote label: %s distance: %d\n",
1583 nhlfe_type2str(nhlfe
->type
),
1584 mpls_label2str(nexthop
->nh_label
->num_labels
,
1585 nexthop
->nh_label
->label
, buf
, sizeof(buf
),
1586 nexthop
->nh_label_type
, 0),
1590 vty_out(vty
, "%s", indent
);
1592 switch (nexthop
->type
) {
1593 case NEXTHOP_TYPE_IPV4
:
1594 case NEXTHOP_TYPE_IPV4_IFINDEX
:
1595 vty_out(vty
, " via %pI4", &nexthop
->gate
.ipv4
);
1596 if (nexthop
->ifindex
)
1597 vty_out(vty
, " dev %s",
1598 ifindex2ifname(nexthop
->ifindex
,
1601 case NEXTHOP_TYPE_IPV6
:
1602 case NEXTHOP_TYPE_IPV6_IFINDEX
:
1603 vty_out(vty
, " via %s",
1604 inet_ntop(AF_INET6
, &nexthop
->gate
.ipv6
, buf
,
1606 if (nexthop
->ifindex
)
1607 vty_out(vty
, " dev %s",
1608 ifindex2ifname(nexthop
->ifindex
,
1611 case NEXTHOP_TYPE_IFINDEX
:
1612 if (nexthop
->ifindex
)
1613 vty_out(vty
, " dev %s",
1614 ifindex2ifname(nexthop
->ifindex
,
1617 case NEXTHOP_TYPE_BLACKHOLE
:
1621 CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_IS_BACKUP
) ? " (backup)"
1624 CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
) ? " (installed)"
1630 * Print an LSP forwarding entry.
1632 static void lsp_print(struct vty
*vty
, struct zebra_lsp
*lsp
)
1634 struct zebra_nhlfe
*nhlfe
, *backup
;
1637 vty_out(vty
, "Local label: %u%s\n", lsp
->ile
.in_label
,
1638 CHECK_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
) ? " (installed)"
1641 frr_each(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
1642 nhlfe_print(nhlfe
, vty
, NULL
);
1644 if (nhlfe
->nexthop
== NULL
||
1645 !CHECK_FLAG(nhlfe
->nexthop
->flags
,
1646 NEXTHOP_FLAG_HAS_BACKUP
))
1649 /* Backup nhlfes: find backups in backup list */
1651 for (j
= 0; j
< nhlfe
->nexthop
->backup_num
; j
++) {
1654 frr_each(nhlfe_list
, &lsp
->backup_nhlfe_list
, backup
) {
1655 if (i
== nhlfe
->nexthop
->backup_idx
[j
])
1661 vty_out(vty
, " [backup %d]", i
);
1662 nhlfe_print(backup
, vty
, " ");
1669 * JSON objects for an LSP forwarding entry.
1671 static json_object
*lsp_json(struct zebra_lsp
*lsp
)
1673 struct zebra_nhlfe
*nhlfe
= NULL
;
1674 json_object
*json
= json_object_new_object();
1675 json_object
*json_nhlfe_list
= json_object_new_array();
1677 json_object_int_add(json
, "inLabel", lsp
->ile
.in_label
);
1679 if (CHECK_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
))
1680 json_object_boolean_true_add(json
, "installed");
1682 frr_each(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
)
1683 json_object_array_add(json_nhlfe_list
, nhlfe_json(nhlfe
));
1685 json_object_object_add(json
, "nexthops", json_nhlfe_list
);
1686 json_nhlfe_list
= NULL
;
1689 frr_each(nhlfe_list
, &lsp
->backup_nhlfe_list
, nhlfe
) {
1690 if (json_nhlfe_list
== NULL
)
1691 json_nhlfe_list
= json_object_new_array();
1693 json_object_array_add(json_nhlfe_list
, nhlfe_json(nhlfe
));
1696 if (json_nhlfe_list
)
1697 json_object_object_add(json
, "backupNexthops", json_nhlfe_list
);
1703 /* Return a sorted linked list of the hash contents */
1704 static struct list
*hash_get_sorted_list(struct hash
*hash
, void *cmp
)
1707 struct hash_bucket
*hb
;
1708 struct list
*sorted_list
= list_new();
1710 sorted_list
->cmp
= (int (*)(void *, void *))cmp
;
1712 for (i
= 0; i
< hash
->size
; i
++)
1713 for (hb
= hash
->index
[i
]; hb
; hb
= hb
->next
)
1714 listnode_add_sort(sorted_list
, hb
->data
);
1720 * Compare two LSPs based on their label values.
1722 static int lsp_cmp(const struct zebra_lsp
*lsp1
, const struct zebra_lsp
*lsp2
)
1724 if (lsp1
->ile
.in_label
< lsp2
->ile
.in_label
)
1727 if (lsp1
->ile
.in_label
> lsp2
->ile
.in_label
)
1734 * Initialize work queue for processing changed LSPs.
1736 static void mpls_processq_init(void)
1738 zrouter
.lsp_process_q
= work_queue_new(zrouter
.master
, "LSP processing");
1740 zrouter
.lsp_process_q
->spec
.workfunc
= &lsp_process
;
1741 zrouter
.lsp_process_q
->spec
.del_item_data
= &lsp_processq_del
;
1742 zrouter
.lsp_process_q
->spec
.completion_func
= &lsp_processq_complete
;
1743 zrouter
.lsp_process_q
->spec
.max_retries
= 0;
1744 zrouter
.lsp_process_q
->spec
.hold
= 10;
1749 * Process LSP update results from zebra dataplane.
1751 void zebra_mpls_lsp_dplane_result(struct zebra_dplane_ctx
*ctx
)
1753 struct zebra_vrf
*zvrf
;
1755 struct zebra_ile tmp_ile
;
1756 struct hash
*lsp_table
;
1757 struct zebra_lsp
*lsp
;
1758 struct zebra_nhlfe
*nhlfe
;
1759 struct nexthop
*nexthop
;
1760 enum dplane_op_e op
;
1761 enum zebra_dplane_result status
;
1762 enum zebra_sr_policy_update_label_mode update_mode
;
1764 op
= dplane_ctx_get_op(ctx
);
1765 status
= dplane_ctx_get_status(ctx
);
1767 if (IS_ZEBRA_DEBUG_DPLANE_DETAIL
)
1768 zlog_debug("LSP dplane ctx %p, op %s, in-label %u, result %s",
1769 ctx
, dplane_op2str(op
),
1770 dplane_ctx_get_in_label(ctx
),
1771 dplane_res2str(status
));
1773 label
= dplane_ctx_get_in_label(ctx
);
1776 case DPLANE_OP_LSP_INSTALL
:
1777 case DPLANE_OP_LSP_UPDATE
:
1778 /* Look for zebra LSP object */
1779 zvrf
= zebra_vrf_lookup_by_id(VRF_DEFAULT
);
1783 lsp_table
= zvrf
->lsp_table
;
1785 tmp_ile
.in_label
= label
;
1786 lsp
= hash_lookup(lsp_table
, &tmp_ile
);
1788 if (IS_ZEBRA_DEBUG_DPLANE
)
1789 zlog_debug("LSP ctx %p: in-label %u not found",
1790 ctx
, dplane_ctx_get_in_label(ctx
));
1794 /* TODO -- Confirm that this result is still 'current' */
1796 if (status
!= ZEBRA_DPLANE_REQUEST_SUCCESS
) {
1797 UNSET_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
);
1798 clear_nhlfe_installed(lsp
);
1799 flog_warn(EC_ZEBRA_LSP_INSTALL_FAILURE
,
1800 "LSP Install Failure: in-label %u",
1805 /* Update zebra object */
1806 SET_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
);
1807 frr_each(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
1808 nexthop
= nhlfe
->nexthop
;
1812 if (CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_SELECTED
) &&
1813 CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
)) {
1814 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
);
1815 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
1819 update_mode
= (op
== DPLANE_OP_LSP_INSTALL
)
1820 ? ZEBRA_SR_POLICY_LABEL_CREATED
1821 : ZEBRA_SR_POLICY_LABEL_UPDATED
;
1822 zebra_sr_policy_label_update(label
, update_mode
);
1825 case DPLANE_OP_LSP_DELETE
:
1826 if (status
!= ZEBRA_DPLANE_REQUEST_SUCCESS
) {
1827 flog_warn(EC_ZEBRA_LSP_DELETE_FAILURE
,
1828 "LSP Deletion Failure: in-label %u",
1829 dplane_ctx_get_in_label(ctx
));
1832 zebra_sr_policy_label_update(label
,
1833 ZEBRA_SR_POLICY_LABEL_REMOVED
);
1836 case DPLANE_OP_LSP_NOTIFY
:
1837 case DPLANE_OP_NONE
:
1838 case DPLANE_OP_ROUTE_INSTALL
:
1839 case DPLANE_OP_ROUTE_UPDATE
:
1840 case DPLANE_OP_ROUTE_DELETE
:
1841 case DPLANE_OP_ROUTE_NOTIFY
:
1842 case DPLANE_OP_NH_INSTALL
:
1843 case DPLANE_OP_NH_UPDATE
:
1844 case DPLANE_OP_NH_DELETE
:
1845 case DPLANE_OP_PW_INSTALL
:
1846 case DPLANE_OP_PW_UNINSTALL
:
1847 case DPLANE_OP_SYS_ROUTE_ADD
:
1848 case DPLANE_OP_SYS_ROUTE_DELETE
:
1849 case DPLANE_OP_ADDR_INSTALL
:
1850 case DPLANE_OP_ADDR_UNINSTALL
:
1851 case DPLANE_OP_MAC_INSTALL
:
1852 case DPLANE_OP_MAC_DELETE
:
1853 case DPLANE_OP_NEIGH_INSTALL
:
1854 case DPLANE_OP_NEIGH_UPDATE
:
1855 case DPLANE_OP_NEIGH_DELETE
:
1856 case DPLANE_OP_VTEP_ADD
:
1857 case DPLANE_OP_VTEP_DELETE
:
1858 case DPLANE_OP_RULE_ADD
:
1859 case DPLANE_OP_RULE_DELETE
:
1860 case DPLANE_OP_RULE_UPDATE
:
1861 case DPLANE_OP_NEIGH_DISCOVER
:
1862 case DPLANE_OP_BR_PORT_UPDATE
:
1863 case DPLANE_OP_IPTABLE_ADD
:
1864 case DPLANE_OP_IPTABLE_DELETE
:
1865 case DPLANE_OP_IPSET_ADD
:
1866 case DPLANE_OP_IPSET_DELETE
:
1867 case DPLANE_OP_IPSET_ENTRY_ADD
:
1868 case DPLANE_OP_IPSET_ENTRY_DELETE
:
1869 case DPLANE_OP_NEIGH_IP_INSTALL
:
1870 case DPLANE_OP_NEIGH_IP_DELETE
:
1871 case DPLANE_OP_NEIGH_TABLE_UPDATE
:
1872 case DPLANE_OP_GRE_SET
:
1873 case DPLANE_OP_INTF_ADDR_ADD
:
1874 case DPLANE_OP_INTF_ADDR_DEL
:
1875 case DPLANE_OP_INTF_NETCONFIG
:
1876 case DPLANE_OP_INTF_INSTALL
:
1877 case DPLANE_OP_INTF_UPDATE
:
1878 case DPLANE_OP_INTF_DELETE
:
1879 case DPLANE_OP_TC_QDISC_INSTALL
:
1880 case DPLANE_OP_TC_QDISC_UNINSTALL
:
1881 case DPLANE_OP_TC_CLASS_ADD
:
1882 case DPLANE_OP_TC_CLASS_DELETE
:
1883 case DPLANE_OP_TC_CLASS_UPDATE
:
1884 case DPLANE_OP_TC_FILTER_ADD
:
1885 case DPLANE_OP_TC_FILTER_DELETE
:
1886 case DPLANE_OP_TC_FILTER_UPDATE
:
1893 * Process LSP installation info from two sets of nhlfes: a set from
1894 * a dplane notification, and a set from the zebra LSP object. Update
1895 * counters of installed nexthops, and return whether the LSP has changed.
1897 static bool compare_notif_nhlfes(const struct nhlfe_list_head
*ctx_head
,
1898 struct nhlfe_list_head
*nhlfe_head
,
1899 int *start_counter
, int *end_counter
)
1901 struct zebra_nhlfe
*nhlfe
;
1902 const struct zebra_nhlfe
*ctx_nhlfe
;
1903 struct nexthop
*nexthop
;
1904 const struct nexthop
*ctx_nexthop
;
1905 int start_count
= 0, end_count
= 0;
1906 bool changed_p
= false;
1907 bool is_debug
= (IS_ZEBRA_DEBUG_DPLANE
| IS_ZEBRA_DEBUG_MPLS
);
1909 frr_each_safe(nhlfe_list
, nhlfe_head
, nhlfe
) {
1910 char buf
[NEXTHOP_STRLEN
];
1912 nexthop
= nhlfe
->nexthop
;
1916 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
))
1921 frr_each(nhlfe_list_const
, ctx_head
, ctx_nhlfe
) {
1922 ctx_nexthop
= ctx_nhlfe
->nexthop
;
1926 if ((ctx_nexthop
->type
== nexthop
->type
) &&
1927 nexthop_same(ctx_nexthop
, nexthop
)) {
1934 nexthop2str(nexthop
, buf
, sizeof(buf
));
1936 if (ctx_nhlfe
&& ctx_nexthop
) {
1938 const char *tstr
= "";
1940 if (!CHECK_FLAG(ctx_nhlfe
->flags
,
1941 NHLFE_FLAG_INSTALLED
))
1944 zlog_debug("LSP dplane notif: matched nh %s (%sinstalled)",
1948 /* Test zebra nhlfe install state */
1949 if (CHECK_FLAG(ctx_nhlfe
->flags
,
1950 NHLFE_FLAG_INSTALLED
)) {
1952 if (!CHECK_FLAG(nhlfe
->flags
,
1953 NHLFE_FLAG_INSTALLED
))
1956 /* Update counter */
1960 if (CHECK_FLAG(nhlfe
->flags
,
1961 NHLFE_FLAG_INSTALLED
))
1966 /* Not mentioned in lfib set -> uninstalled */
1967 if (CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
) ||
1968 CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
) ||
1969 CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
)) {
1974 zlog_debug("LSP dplane notif: no match, nh %s",
1980 *start_counter
+= start_count
;
1982 *end_counter
+= end_count
;
1988 * Update an lsp nhlfe list from a dplane context, typically an async
1989 * notification context. Update the LSP list to match the installed
1990 * status from the context's list.
1992 static int update_nhlfes_from_ctx(struct nhlfe_list_head
*nhlfe_head
,
1993 const struct nhlfe_list_head
*ctx_head
)
1996 struct zebra_nhlfe
*nhlfe
;
1997 const struct zebra_nhlfe
*ctx_nhlfe
;
1998 struct nexthop
*nexthop
;
1999 const struct nexthop
*ctx_nexthop
;
2000 bool is_debug
= (IS_ZEBRA_DEBUG_DPLANE
| IS_ZEBRA_DEBUG_MPLS
);
2002 frr_each_safe(nhlfe_list
, nhlfe_head
, nhlfe
) {
2003 char buf
[NEXTHOP_STRLEN
];
2005 nexthop
= nhlfe
->nexthop
;
2011 frr_each(nhlfe_list_const
, ctx_head
, ctx_nhlfe
) {
2012 ctx_nexthop
= ctx_nhlfe
->nexthop
;
2016 if ((ctx_nexthop
->type
== nexthop
->type
) &&
2017 nexthop_same(ctx_nexthop
, nexthop
)) {
2024 nexthop2str(nexthop
, buf
, sizeof(buf
));
2026 if (ctx_nhlfe
&& ctx_nexthop
) {
2028 /* Bring zebra nhlfe install state into sync */
2029 if (CHECK_FLAG(ctx_nhlfe
->flags
,
2030 NHLFE_FLAG_INSTALLED
)) {
2032 zlog_debug("%s: matched lsp nhlfe %s (installed)",
2035 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
);
2036 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_SELECTED
);
2040 zlog_debug("%s: matched lsp nhlfe %s (not installed)",
2043 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
);
2044 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_SELECTED
);
2047 if (CHECK_FLAG(ctx_nhlfe
->nexthop
->flags
,
2048 NEXTHOP_FLAG_FIB
)) {
2049 SET_FLAG(nhlfe
->nexthop
->flags
,
2050 NEXTHOP_FLAG_ACTIVE
);
2051 SET_FLAG(nhlfe
->nexthop
->flags
,
2054 UNSET_FLAG(nhlfe
->nexthop
->flags
,
2055 NEXTHOP_FLAG_ACTIVE
);
2056 UNSET_FLAG(nhlfe
->nexthop
->flags
,
2061 /* Not mentioned in lfib set -> uninstalled */
2063 zlog_debug("%s: no match for lsp nhlfe %s",
2065 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
);
2066 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_SELECTED
);
2067 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
2068 UNSET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
);
2076 * Process async dplane notifications.
2078 void zebra_mpls_process_dplane_notify(struct zebra_dplane_ctx
*ctx
)
2080 struct zebra_vrf
*zvrf
;
2081 struct zebra_ile tmp_ile
;
2082 struct hash
*lsp_table
;
2083 struct zebra_lsp
*lsp
;
2084 const struct nhlfe_list_head
*ctx_list
;
2085 int start_count
= 0, end_count
= 0; /* Installed counts */
2086 bool changed_p
= false;
2087 bool is_debug
= (IS_ZEBRA_DEBUG_DPLANE
| IS_ZEBRA_DEBUG_MPLS
);
2088 enum zebra_sr_policy_update_label_mode update_mode
;
2091 zlog_debug("LSP dplane notif, in-label %u",
2092 dplane_ctx_get_in_label(ctx
));
2094 /* Look for zebra LSP object */
2095 zvrf
= zebra_vrf_lookup_by_id(VRF_DEFAULT
);
2099 lsp_table
= zvrf
->lsp_table
;
2101 tmp_ile
.in_label
= dplane_ctx_get_in_label(ctx
);
2102 lsp
= hash_lookup(lsp_table
, &tmp_ile
);
2105 zlog_debug("dplane LSP notif: in-label %u not found",
2106 dplane_ctx_get_in_label(ctx
));
2111 * The dataplane/forwarding plane is notifying zebra about the state
2112 * of the nexthops associated with this LSP. First, we take a
2113 * pre-scan pass to determine whether the LSP has transitioned
2114 * from installed -> uninstalled. In that case, we need to have
2115 * the existing state of the LSP objects available before making
2118 ctx_list
= dplane_ctx_get_nhlfe_list(ctx
);
2120 changed_p
= compare_notif_nhlfes(ctx_list
, &lsp
->nhlfe_list
,
2121 &start_count
, &end_count
);
2124 zlog_debug("LSP dplane notif: lfib start_count %d, end_count %d%s",
2125 start_count
, end_count
,
2126 changed_p
? ", changed" : "");
2128 ctx_list
= dplane_ctx_get_backup_nhlfe_list(ctx
);
2130 if (compare_notif_nhlfes(ctx_list
, &lsp
->backup_nhlfe_list
,
2131 &start_count
, &end_count
))
2132 /* Avoid accidentally setting back to 'false' */
2136 zlog_debug("LSP dplane notif: lfib backups, start_count %d, end_count %d%s",
2137 start_count
, end_count
,
2138 changed_p
? ", changed" : "");
2141 * Has the LSP become uninstalled? We need the existing state of the
2142 * nexthops/nhlfes at this point so we know what to delete.
2144 if (start_count
> 0 && end_count
== 0) {
2145 /* Inform other lfibs */
2146 dplane_lsp_notif_update(lsp
, DPLANE_OP_LSP_DELETE
, ctx
);
2150 * Now we take a second pass and bring the zebra
2151 * nexthop state into sync with the forwarding-plane state.
2153 ctx_list
= dplane_ctx_get_nhlfe_list(ctx
);
2154 update_nhlfes_from_ctx(&lsp
->nhlfe_list
, ctx_list
);
2156 ctx_list
= dplane_ctx_get_backup_nhlfe_list(ctx
);
2157 update_nhlfes_from_ctx(&lsp
->backup_nhlfe_list
, ctx_list
);
2159 if (end_count
> 0) {
2160 SET_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
);
2162 /* SR-TE update too */
2163 if (start_count
== 0)
2164 update_mode
= ZEBRA_SR_POLICY_LABEL_CREATED
;
2166 update_mode
= ZEBRA_SR_POLICY_LABEL_UPDATED
;
2167 zebra_sr_policy_label_update(lsp
->ile
.in_label
, update_mode
);
2170 dplane_lsp_notif_update(lsp
, DPLANE_OP_LSP_UPDATE
, ctx
);
2173 /* SR-TE update too */
2174 zebra_sr_policy_label_update(lsp
->ile
.in_label
,
2175 ZEBRA_SR_POLICY_LABEL_REMOVED
);
2177 UNSET_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
);
2178 clear_nhlfe_installed(lsp
);
2183 * Install dynamic LSP entry.
2185 int zebra_mpls_lsp_install(struct zebra_vrf
*zvrf
, struct route_node
*rn
,
2186 struct route_entry
*re
)
2188 struct route_table
*table
;
2189 struct zebra_fec
*fec
;
2191 table
= zvrf
->fec_table
[family2afi(PREFIX_FAMILY(&rn
->p
))];
2195 /* See if there is a configured label binding for this FEC. */
2196 fec
= fec_find(table
, &rn
->p
);
2197 if (!fec
|| fec
->label
== MPLS_INVALID_LABEL
)
2200 /* We cannot install a label forwarding entry if local label is the
2201 * implicit-null label.
2203 if (fec
->label
== MPLS_LABEL_IMPLICIT_NULL
)
2206 if (lsp_install(zvrf
, fec
->label
, rn
, re
))
2213 * Uninstall dynamic LSP entry, if any.
2215 int zebra_mpls_lsp_uninstall(struct zebra_vrf
*zvrf
, struct route_node
*rn
,
2216 struct route_entry
*re
)
2218 struct route_table
*table
;
2219 struct zebra_fec
*fec
;
2221 table
= zvrf
->fec_table
[family2afi(PREFIX_FAMILY(&rn
->p
))];
2225 /* See if there is a configured label binding for this FEC. */
2226 fec
= fec_find(table
, &rn
->p
);
2227 if (!fec
|| fec
->label
== MPLS_INVALID_LABEL
)
2230 /* Uninstall always removes all dynamic NHLFEs. */
2231 return lsp_uninstall(zvrf
, fec
->label
);
2235 * Add an NHLFE to an LSP, return the newly-added object. This path only changes
2236 * the LSP object - nothing is scheduled for processing, for example.
2238 struct zebra_nhlfe
*
2239 zebra_mpls_lsp_add_nhlfe(struct zebra_lsp
*lsp
, enum lsp_types_t lsp_type
,
2240 enum nexthop_types_t gtype
, const union g_addr
*gate
,
2241 ifindex_t ifindex
, uint8_t num_labels
,
2242 const mpls_label_t
*out_labels
)
2244 /* Just a public pass-through to the internal implementation */
2245 return nhlfe_add(lsp
, lsp_type
, gtype
, gate
, ifindex
, num_labels
,
2246 out_labels
, false /*backup*/);
2250 * Add a backup NHLFE to an LSP, return the newly-added object.
2251 * This path only changes the LSP object - nothing is scheduled for
2252 * processing, for example.
2254 struct zebra_nhlfe
*zebra_mpls_lsp_add_backup_nhlfe(
2255 struct zebra_lsp
*lsp
, enum lsp_types_t lsp_type
,
2256 enum nexthop_types_t gtype
, const union g_addr
*gate
, ifindex_t ifindex
,
2257 uint8_t num_labels
, const mpls_label_t
*out_labels
)
2259 /* Just a public pass-through to the internal implementation */
2260 return nhlfe_add(lsp
, lsp_type
, gtype
, gate
, ifindex
, num_labels
,
2265 * Add an NHLFE to an LSP based on a nexthop; return the newly-added object
2267 struct zebra_nhlfe
*zebra_mpls_lsp_add_nh(struct zebra_lsp
*lsp
,
2268 enum lsp_types_t lsp_type
,
2269 const struct nexthop
*nh
)
2271 struct zebra_nhlfe
*nhlfe
;
2273 if (nh
->nh_label
== NULL
|| nh
->nh_label
->num_labels
== 0)
2276 nhlfe
= nhlfe_add(lsp
, lsp_type
, nh
->type
, &nh
->gate
, nh
->ifindex
,
2277 nh
->nh_label
->num_labels
, nh
->nh_label
->label
,
2284 * Add a backup NHLFE to an LSP based on a nexthop;
2285 * return the newly-added object.
2287 struct zebra_nhlfe
*zebra_mpls_lsp_add_backup_nh(struct zebra_lsp
*lsp
,
2288 enum lsp_types_t lsp_type
,
2289 const struct nexthop
*nh
)
2291 struct zebra_nhlfe
*nhlfe
;
2293 if (nh
->nh_label
== NULL
|| nh
->nh_label
->num_labels
== 0)
2296 nhlfe
= nhlfe_add(lsp
, lsp_type
, nh
->type
, &nh
->gate
,
2297 nh
->ifindex
, nh
->nh_label
->num_labels
,
2298 nh
->nh_label
->label
, true);
2304 * Free an allocated NHLFE
2306 void zebra_mpls_nhlfe_free(struct zebra_nhlfe
*nhlfe
)
2308 /* Just a pass-through to the internal implementation */
2313 * Registration from a client for the label binding for a FEC. If a binding
2314 * already exists, it is informed to the client.
2315 * NOTE: If there is a manually configured label binding, that is used.
2316 * Otherwise, if a label index is specified, it means we have to allocate the
2317 * label from a locally configured label block (SRGB), if one exists and index
2318 * is acceptable. If no label index then just register the specified label.
2319 * NOTE2: Either label or label_index is expected to be set to MPLS_INVALID_*
2320 * by the calling function. Register requests with both will be rejected.
2322 int zebra_mpls_fec_register(struct zebra_vrf
*zvrf
, struct prefix
*p
,
2323 uint32_t label
, uint32_t label_index
,
2324 struct zserv
*client
)
2326 struct route_table
*table
;
2327 struct zebra_fec
*fec
;
2329 bool label_change
= false;
2331 bool have_label_index
= (label_index
!= MPLS_INVALID_LABEL_INDEX
);
2332 bool is_configured_fec
= false; /* indicate statically configured FEC */
2334 table
= zvrf
->fec_table
[family2afi(PREFIX_FAMILY(p
))];
2338 if (label
!= MPLS_INVALID_LABEL
&& have_label_index
) {
2340 EC_ZEBRA_FEC_LABEL_INDEX_LABEL_CONFLICT
,
2341 "Rejecting FEC register for %pFX with both label %u and Label Index %u specified, client %s",
2342 p
, label
, label_index
,
2343 zebra_route_string(client
->proto
));
2348 fec
= fec_find(table
, p
);
2350 fec
= fec_add(table
, p
, label
, 0, label_index
);
2353 EC_ZEBRA_FEC_ADD_FAILED
,
2354 "Failed to add FEC %pFX upon register, client %s",
2355 p
, zebra_route_string(client
->proto
));
2359 old_label
= MPLS_INVALID_LABEL
;
2362 /* Check if the FEC has been statically defined in the config */
2363 is_configured_fec
= fec
->flags
& FEC_FLAG_CONFIGURED
;
2364 /* Client may register same FEC with different label index. */
2366 (listnode_lookup(fec
->client_list
, client
) == NULL
);
2367 if (!new_client
&& fec
->label_index
== label_index
2368 && fec
->label
== label
)
2369 /* Duplicate register */
2372 /* Save current label, update the FEC */
2373 old_label
= fec
->label
;
2374 fec
->label_index
= label_index
;
2378 listnode_add(fec
->client_list
, client
);
2380 if (IS_ZEBRA_DEBUG_MPLS
)
2381 zlog_debug("FEC %pFX label%s %u %s by client %s%s", p
,
2382 have_label_index
? " index" : "",
2383 have_label_index
? label_index
: label
,
2384 new_client
? "registered" : "updated",
2385 zebra_route_string(client
->proto
),
2387 ? ", but using statically configured label"
2390 /* If not a statically configured FEC, derive the local label
2391 * from label index or use the provided label
2393 if (!is_configured_fec
) {
2394 if (have_label_index
)
2395 fec_derive_label_from_index(zvrf
, fec
);
2399 /* If no label change, exit. */
2400 if (fec
->label
== old_label
)
2403 label_change
= true;
2406 /* If new client or label change, update client and install or uninstall
2407 * label forwarding entry as needed.
2409 /* Inform client of label, if needed. */
2410 if ((new_client
&& fec
->label
!= MPLS_INVALID_LABEL
) || label_change
) {
2411 if (IS_ZEBRA_DEBUG_MPLS
)
2412 zlog_debug("Update client label %u", fec
->label
);
2413 fec_send(fec
, client
);
2416 if (new_client
|| label_change
)
2417 return fec_change_update_lsp(zvrf
, fec
, old_label
);
2423 * Deregistration from a client for the label binding for a FEC. The FEC
2424 * itself is deleted if no other registered clients exist and there is no
2425 * label bound to the FEC.
2427 int zebra_mpls_fec_unregister(struct zebra_vrf
*zvrf
, struct prefix
*p
,
2428 struct zserv
*client
)
2430 struct route_table
*table
;
2431 struct zebra_fec
*fec
;
2433 table
= zvrf
->fec_table
[family2afi(PREFIX_FAMILY(p
))];
2437 fec
= fec_find(table
, p
);
2439 flog_err(EC_ZEBRA_FEC_RM_FAILED
,
2440 "Failed to find FEC %pFX upon unregister, client %s",
2441 p
, zebra_route_string(client
->proto
));
2445 listnode_delete(fec
->client_list
, client
);
2447 if (IS_ZEBRA_DEBUG_MPLS
)
2448 zlog_debug("FEC %pFX unregistered by client %s", p
,
2449 zebra_route_string(client
->proto
));
2451 /* If not a configured entry, delete the FEC if no other clients. Before
2452 * deleting, see if any LSP needs to be uninstalled.
2454 if (!(fec
->flags
& FEC_FLAG_CONFIGURED
)
2455 && list_isempty(fec
->client_list
)) {
2456 mpls_label_t old_label
= fec
->label
;
2457 fec
->label
= MPLS_INVALID_LABEL
; /* reset */
2458 fec_change_update_lsp(zvrf
, fec
, old_label
);
2466 * Cleanup any FECs registered by this client.
2468 static int zebra_mpls_cleanup_fecs_for_client(struct zserv
*client
)
2470 struct zebra_vrf
*zvrf
= zebra_vrf_lookup_by_id(VRF_DEFAULT
);
2471 struct route_node
*rn
;
2472 struct zebra_fec
*fec
;
2473 struct listnode
*node
;
2474 struct zserv
*fec_client
;
2477 for (af
= AFI_IP
; af
< AFI_MAX
; af
++) {
2478 if (zvrf
->fec_table
[af
] == NULL
)
2481 for (rn
= route_top(zvrf
->fec_table
[af
]); rn
;
2482 rn
= route_next(rn
)) {
2484 if (!fec
|| list_isempty(fec
->client_list
))
2487 for (ALL_LIST_ELEMENTS_RO(fec
->client_list
, node
,
2489 if (fec_client
== client
) {
2490 listnode_delete(fec
->client_list
,
2492 if (!(fec
->flags
& FEC_FLAG_CONFIGURED
)
2493 && list_isempty(fec
->client_list
))
2504 struct lsp_uninstall_args
{
2505 struct hash
*lsp_table
;
2506 enum lsp_types_t type
;
2510 * Cleanup MPLS labels registered by this client.
2512 static int zebra_mpls_cleanup_zclient_labels(struct zserv
*client
)
2515 struct zebra_vrf
*zvrf
;
2517 RB_FOREACH (vrf
, vrf_id_head
, &vrfs_by_id
) {
2518 struct lsp_uninstall_args args
;
2525 args
.lsp_table
= zvrf
->lsp_table
;
2526 args
.type
= lsp_type_from_re_type(client
->proto
);
2527 hash_iterate(zvrf
->lsp_table
, mpls_lsp_uninstall_all_type
,
2531 mpls_ftn_uninstall_all(zvrf
, AFI_IP
,
2532 lsp_type_from_re_type(client
->proto
));
2533 mpls_ftn_uninstall_all(zvrf
, AFI_IP6
,
2534 lsp_type_from_re_type(client
->proto
));
2541 * Return FEC (if any) to which this label is bound.
2542 * Note: Only works for per-prefix binding and when the label is not
2544 * TODO: Currently walks entire table, can optimize later with another
2547 struct zebra_fec
*zebra_mpls_fec_for_label(struct zebra_vrf
*zvrf
,
2550 struct route_node
*rn
;
2551 struct zebra_fec
*fec
;
2554 for (af
= AFI_IP
; af
< AFI_MAX
; af
++) {
2555 if (zvrf
->fec_table
[af
] == NULL
)
2558 for (rn
= route_top(zvrf
->fec_table
[af
]); rn
;
2559 rn
= route_next(rn
)) {
2563 if (fec
->label
== label
)
2572 * Inform if specified label is currently bound to a FEC or not.
2574 int zebra_mpls_label_already_bound(struct zebra_vrf
*zvrf
, mpls_label_t label
)
2576 return (zebra_mpls_fec_for_label(zvrf
, label
) ? 1 : 0);
2580 * Add static FEC to label binding. If there are clients registered for this
2581 * FEC, notify them. If there are labeled routes for this FEC, install the
2582 * label forwarding entry.
2584 int zebra_mpls_static_fec_add(struct zebra_vrf
*zvrf
, struct prefix
*p
,
2585 mpls_label_t in_label
)
2587 struct route_table
*table
;
2588 struct zebra_fec
*fec
;
2589 mpls_label_t old_label
;
2592 table
= zvrf
->fec_table
[family2afi(PREFIX_FAMILY(p
))];
2596 /* Update existing FEC or create a new one. */
2597 fec
= fec_find(table
, p
);
2599 fec
= fec_add(table
, p
, in_label
, FEC_FLAG_CONFIGURED
,
2600 MPLS_INVALID_LABEL_INDEX
);
2602 flog_err(EC_ZEBRA_FEC_ADD_FAILED
,
2603 "Failed to add FEC %pFX upon config", p
);
2607 if (IS_ZEBRA_DEBUG_MPLS
)
2608 zlog_debug("Add fec %pFX label %u", p
, in_label
);
2610 fec
->flags
|= FEC_FLAG_CONFIGURED
;
2611 if (fec
->label
== in_label
)
2612 /* Duplicate config */
2615 /* Label change, update clients. */
2616 old_label
= fec
->label
;
2617 if (IS_ZEBRA_DEBUG_MPLS
)
2618 zlog_debug("Update fec %pFX new label %u", p
, in_label
);
2620 fec
->label
= in_label
;
2621 fec_update_clients(fec
);
2623 /* Update label forwarding entries appropriately */
2624 ret
= fec_change_update_lsp(zvrf
, fec
, old_label
);
2631 * Remove static FEC to label binding. If there are no clients registered
2632 * for this FEC, delete the FEC; else notify clients
2633 * Note: Upon delete of static binding, if label index exists for this FEC,
2634 * client may need to be updated with derived label.
2636 int zebra_mpls_static_fec_del(struct zebra_vrf
*zvrf
, struct prefix
*p
)
2638 struct route_table
*table
;
2639 struct zebra_fec
*fec
;
2640 mpls_label_t old_label
;
2642 table
= zvrf
->fec_table
[family2afi(PREFIX_FAMILY(p
))];
2646 fec
= fec_find(table
, p
);
2648 flog_err(EC_ZEBRA_FEC_RM_FAILED
,
2649 "Failed to find FEC %pFX upon delete", p
);
2653 if (IS_ZEBRA_DEBUG_MPLS
) {
2654 zlog_debug("Delete fec %pFX label %u label index %u", p
,
2655 fec
->label
, fec
->label_index
);
2658 old_label
= fec
->label
;
2659 fec
->flags
&= ~FEC_FLAG_CONFIGURED
;
2660 fec
->label
= MPLS_INVALID_LABEL
;
2662 /* If no client exists, just delete the FEC. */
2663 if (list_isempty(fec
->client_list
)) {
2668 /* Derive the local label (from label index) or reset it. */
2669 fec_derive_label_from_index(zvrf
, fec
);
2671 /* If there is a label change, update clients. */
2672 if (fec
->label
== old_label
)
2674 fec_update_clients(fec
);
2676 /* Update label forwarding entries appropriately */
2677 return fec_change_update_lsp(zvrf
, fec
, old_label
);
2681 * Display MPLS FEC to label binding configuration (VTY command handler).
2683 int zebra_mpls_write_fec_config(struct vty
*vty
, struct zebra_vrf
*zvrf
)
2685 struct route_node
*rn
;
2687 struct zebra_fec
*fec
;
2690 for (af
= AFI_IP
; af
< AFI_MAX
; af
++) {
2691 if (zvrf
->fec_table
[af
] == NULL
)
2694 for (rn
= route_top(zvrf
->fec_table
[af
]); rn
;
2695 rn
= route_next(rn
)) {
2702 if (!(fec
->flags
& FEC_FLAG_CONFIGURED
))
2706 vty_out(vty
, "mpls label bind %pFX %s\n", &rn
->p
,
2707 label2str(fec
->label
, 0, lstr
, BUFSIZ
));
2715 * Display MPLS FEC to label binding (VTY command handler).
2717 void zebra_mpls_print_fec_table(struct vty
*vty
, struct zebra_vrf
*zvrf
)
2719 struct route_node
*rn
;
2722 for (af
= AFI_IP
; af
< AFI_MAX
; af
++) {
2723 if (zvrf
->fec_table
[af
] == NULL
)
2726 for (rn
= route_top(zvrf
->fec_table
[af
]); rn
;
2727 rn
= route_next(rn
)) {
2730 fec_print(rn
->info
, vty
);
2736 * Display MPLS FEC to label binding for a specific FEC (VTY command handler).
2738 void zebra_mpls_print_fec(struct vty
*vty
, struct zebra_vrf
*zvrf
,
2741 struct route_table
*table
;
2742 struct route_node
*rn
;
2744 table
= zvrf
->fec_table
[family2afi(PREFIX_FAMILY(p
))];
2749 rn
= route_node_lookup(table
, p
);
2753 route_unlock_node(rn
);
2757 fec_print(rn
->info
, vty
);
2760 static void mpls_zebra_nhe_update(struct route_entry
*re
, afi_t afi
,
2761 struct nhg_hash_entry
*new_nhe
)
2763 struct nhg_hash_entry
*nhe
;
2765 nhe
= zebra_nhg_rib_find_nhe(new_nhe
, afi
);
2767 route_entry_update_nhe(re
, nhe
);
2770 static bool ftn_update_nexthop(bool add_p
, struct nexthop
*nexthop
,
2771 enum lsp_types_t type
,
2772 const struct zapi_nexthop
*znh
)
2774 if (add_p
&& nexthop
->nh_label_type
== ZEBRA_LSP_NONE
)
2775 nexthop_add_labels(nexthop
, type
, znh
->label_num
, znh
->labels
);
2776 else if (!add_p
&& nexthop
->nh_label_type
== type
)
2777 nexthop_del_labels(nexthop
);
2784 void zebra_mpls_ftn_uninstall(struct zebra_vrf
*zvrf
, enum lsp_types_t type
,
2785 struct prefix
*prefix
, uint8_t route_type
,
2786 uint8_t route_instance
)
2788 struct route_table
*table
;
2789 struct route_node
*rn
;
2790 struct route_entry
*re
;
2791 struct nexthop
*nexthop
;
2792 struct nhg_hash_entry
*new_nhe
;
2793 afi_t afi
= family2afi(prefix
->family
);
2796 table
= zebra_vrf_table(afi
, SAFI_UNICAST
, zvrf_id(zvrf
));
2800 /* Lookup existing route */
2801 rn
= route_node_get(table
, prefix
);
2802 RNODE_FOREACH_RE (rn
, re
) {
2803 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
))
2805 if (re
->type
== route_type
&& re
->instance
== route_instance
)
2812 * Nexthops are now shared by multiple routes, so we have to make
2813 * a local copy, modify the copy, then update the route.
2815 new_nhe
= zebra_nhe_copy(re
->nhe
, 0);
2817 for (nexthop
= new_nhe
->nhg
.nexthop
; nexthop
; nexthop
= nexthop
->next
)
2818 nexthop_del_labels(nexthop
);
2820 /* Update backup routes/nexthops also, if present. */
2821 if (zebra_nhg_get_backup_nhg(new_nhe
) != NULL
) {
2822 for (nexthop
= new_nhe
->backup_info
->nhe
->nhg
.nexthop
; nexthop
;
2823 nexthop
= nexthop
->next
)
2824 nexthop_del_labels(nexthop
);
2827 SET_FLAG(re
->status
, ROUTE_ENTRY_CHANGED
);
2828 SET_FLAG(re
->status
, ROUTE_ENTRY_LABELS_CHANGED
);
2830 /* This will create (or ref) a new nhe, so we will discard the local
2833 mpls_zebra_nhe_update(re
, afi
, new_nhe
);
2835 zebra_nhg_free(new_nhe
);
2841 * Iterate through a list of nexthops, for a match for 'znh'. If found,
2842 * update its labels according to 'add_p', and return 'true' if successful.
2844 static bool ftn_update_znh(bool add_p
, enum lsp_types_t type
,
2845 struct nexthop
*head
, const struct zapi_nexthop
*znh
)
2847 bool found
= false, success
= false;
2848 struct nexthop
*nexthop
;
2850 for (nexthop
= head
; nexthop
; nexthop
= nexthop
->next
) {
2851 switch (nexthop
->type
) {
2852 case NEXTHOP_TYPE_IPV4
:
2853 case NEXTHOP_TYPE_IPV4_IFINDEX
:
2854 if (znh
->type
!= NEXTHOP_TYPE_IPV4
2855 && znh
->type
!= NEXTHOP_TYPE_IPV4_IFINDEX
)
2857 if (!IPV4_ADDR_SAME(&nexthop
->gate
.ipv4
,
2860 if (nexthop
->type
== NEXTHOP_TYPE_IPV4_IFINDEX
2861 && nexthop
->ifindex
!= znh
->ifindex
)
2866 if (!ftn_update_nexthop(add_p
, nexthop
, type
, znh
))
2871 case NEXTHOP_TYPE_IPV6
:
2872 case NEXTHOP_TYPE_IPV6_IFINDEX
:
2873 if (znh
->type
!= NEXTHOP_TYPE_IPV6
2874 && znh
->type
!= NEXTHOP_TYPE_IPV6_IFINDEX
)
2876 if (!IPV6_ADDR_SAME(&nexthop
->gate
.ipv6
,
2879 if (nexthop
->type
== NEXTHOP_TYPE_IPV6_IFINDEX
2880 && nexthop
->ifindex
!= znh
->ifindex
)
2885 if (!ftn_update_nexthop(add_p
, nexthop
, type
, znh
))
2889 case NEXTHOP_TYPE_IFINDEX
:
2890 if (znh
->type
!= NEXTHOP_TYPE_IFINDEX
)
2892 if (nexthop
->ifindex
!= znh
->ifindex
)
2897 if (!ftn_update_nexthop(add_p
, nexthop
, type
, znh
))
2901 case NEXTHOP_TYPE_BLACKHOLE
:
2914 * Install/uninstall LSP and (optionally) FEC-To-NHLFE (FTN) bindings,
2915 * using zapi message info.
2916 * There are several changes that need to be made, in several zebra
2917 * data structures, so we want to do all the work required at once.
2919 void zebra_mpls_zapi_labels_process(bool add_p
, struct zebra_vrf
*zvrf
,
2920 const struct zapi_labels
*zl
)
2922 int i
, counter
, ret
= 0;
2923 char buf
[NEXTHOP_STRLEN
];
2924 const struct zapi_nexthop
*znh
;
2925 struct route_table
*table
;
2926 struct route_node
*rn
= NULL
;
2927 struct route_entry
*re
= NULL
;
2928 struct nhg_hash_entry
*new_nhe
= NULL
;
2931 const struct prefix
*prefix
= NULL
;
2932 struct hash
*lsp_table
;
2933 struct zebra_ile tmp_ile
;
2934 struct zebra_lsp
*lsp
= NULL
;
2936 /* Prep LSP for add case */
2939 lsp_table
= zvrf
->lsp_table
;
2943 /* Find or create LSP object */
2944 tmp_ile
.in_label
= zl
->local_label
;
2945 lsp
= hash_get(lsp_table
, &tmp_ile
, lsp_alloc
);
2948 /* Prep for route/FEC update if requested */
2949 if (CHECK_FLAG(zl
->message
, ZAPI_LABELS_FTN
)) {
2950 prefix
= &zl
->route
.prefix
;
2952 afi
= family2afi(prefix
->family
);
2955 table
= zebra_vrf_table(afi
, SAFI_UNICAST
, zvrf_id(zvrf
));
2957 /* Lookup existing route */
2958 rn
= route_node_get(table
, prefix
);
2959 RNODE_FOREACH_RE(rn
, re
) {
2960 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_REMOVED
))
2962 if (re
->type
== zl
->route
.type
&&
2963 re
->instance
== zl
->route
.instance
)
2970 * Copy over current nexthops into a temporary group.
2971 * We can't just change the values here since the nhgs
2972 * are shared and if the labels change, we'll need
2973 * to find or create a new nhg. We need to create
2974 * a whole temporary group, make changes to it,
2975 * then attach that to the route.
2977 new_nhe
= zebra_nhe_copy(re
->nhe
, 0);
2981 * The old version of the zapi code
2982 * attempted to manage LSPs before trying to
2983 * find a route/FEC, so we'll continue that way.
2985 if (IS_ZEBRA_DEBUG_RECV
|| IS_ZEBRA_DEBUG_MPLS
)
2987 "%s: FTN update requested: no route for prefix %pFX",
2993 * Use info from the zapi nexthops to add/replace/remove LSP/FECs
2997 for (i
= 0; i
< zl
->nexthop_num
; i
++) {
2999 znh
= &zl
->nexthops
[i
];
3001 /* Attempt LSP update */
3003 ret
= lsp_znh_install(lsp
, zl
->type
, znh
);
3005 ret
= mpls_lsp_uninstall(zvrf
, zl
->type
,
3006 zl
->local_label
, znh
->type
,
3007 &znh
->gate
, znh
->ifindex
,
3010 if (IS_ZEBRA_DEBUG_RECV
|| IS_ZEBRA_DEBUG_MPLS
) {
3011 zapi_nexthop2str(znh
, buf
, sizeof(buf
));
3012 zlog_debug("%s: Unable to %sinstall LSP: label %u, znh %s",
3013 __func__
, (add_p
? "" : "un"),
3014 zl
->local_label
, buf
);
3019 /* Attempt route/FEC update if requested */
3023 /* Search the route's nexthops for a match, and update it. */
3024 found
= ftn_update_znh(add_p
, zl
->type
, new_nhe
->nhg
.nexthop
,
3028 } else if (IS_ZEBRA_DEBUG_RECV
| IS_ZEBRA_DEBUG_MPLS
) {
3029 zapi_nexthop2str(znh
, buf
, sizeof(buf
));
3031 "%s: Unable to update FEC: prefix %pFX, label %u, znh %s",
3032 __func__
, prefix
, zl
->local_label
, buf
);
3037 * Process backup LSPs/nexthop entries also. We associate backup
3038 * LSP info with backup nexthops.
3040 if (!CHECK_FLAG(zl
->message
, ZAPI_LABELS_HAS_BACKUPS
))
3043 for (i
= 0; i
< zl
->backup_nexthop_num
; i
++) {
3045 znh
= &zl
->backup_nexthops
[i
];
3048 ret
= lsp_backup_znh_install(lsp
, zl
->type
, znh
);
3050 ret
= mpls_lsp_uninstall(zvrf
, zl
->type
,
3052 znh
->type
, &znh
->gate
,
3053 znh
->ifindex
, true);
3056 if (IS_ZEBRA_DEBUG_RECV
||
3057 IS_ZEBRA_DEBUG_MPLS
) {
3058 zapi_nexthop2str(znh
, buf
, sizeof(buf
));
3059 zlog_debug("%s: Unable to %sinstall backup LSP: label %u, znh %s",
3060 __func__
, (add_p
? "" : "un"),
3061 zl
->local_label
, buf
);
3066 /* Attempt backup nexthop/FEC update if requested */
3067 if (re
== NULL
|| zebra_nhg_get_backup_nhg(new_nhe
) == NULL
)
3070 /* Search the route's backup nexthops for a match
3073 found
= ftn_update_znh(add_p
, zl
->type
,
3074 new_nhe
->backup_info
->nhe
->nhg
.nexthop
,
3078 } else if (IS_ZEBRA_DEBUG_RECV
| IS_ZEBRA_DEBUG_MPLS
) {
3079 zapi_nexthop2str(znh
, buf
, sizeof(buf
));
3081 "%s: Unable to update backup FEC: prefix %pFX, label %u, znh %s",
3082 __func__
, prefix
, zl
->local_label
, buf
);
3089 * If we made changes, update the route, and schedule it
3090 * for rib processing
3092 if (re
!= NULL
&& counter
> 0) {
3095 SET_FLAG(re
->status
, ROUTE_ENTRY_CHANGED
);
3096 SET_FLAG(re
->status
, ROUTE_ENTRY_LABELS_CHANGED
);
3098 mpls_zebra_nhe_update(re
, afi
, new_nhe
);
3104 zebra_nhg_free(new_nhe
);
3108 * Install/update a NHLFE for an LSP in the forwarding table. This may be
3109 * a new LSP entry or a new NHLFE for an existing in-label or an update of
3110 * the out-label for an existing NHLFE (update case).
3112 static struct zebra_nhlfe
*
3113 lsp_add_nhlfe(struct zebra_lsp
*lsp
, enum lsp_types_t type
,
3114 uint8_t num_out_labels
, const mpls_label_t
*out_labels
,
3115 enum nexthop_types_t gtype
, const union g_addr
*gate
,
3116 ifindex_t ifindex
, bool is_backup
)
3118 struct zebra_nhlfe
*nhlfe
;
3119 char buf
[MPLS_LABEL_STRLEN
];
3120 const char *backup_str
;
3123 nhlfe
= nhlfe_find(&lsp
->backup_nhlfe_list
, type
, gtype
,
3125 backup_str
= "backup ";
3127 nhlfe
= nhlfe_find(&lsp
->nhlfe_list
, type
, gtype
, gate
,
3133 struct nexthop
*nh
= nhlfe
->nexthop
;
3136 assert(nh
->nh_label
);
3138 /* Clear deleted flag (in case it was set) */
3139 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
);
3140 if (nh
->nh_label
->num_labels
== num_out_labels
3141 && !memcmp(nh
->nh_label
->label
, out_labels
,
3142 sizeof(mpls_label_t
) * num_out_labels
))
3146 if (IS_ZEBRA_DEBUG_MPLS
) {
3147 char buf2
[MPLS_LABEL_STRLEN
];
3148 char buf3
[MPLS_LABEL_STRLEN
];
3150 nhlfe2str(nhlfe
, buf
, sizeof(buf
));
3151 mpls_label2str(num_out_labels
, out_labels
, buf2
,
3152 sizeof(buf2
), 0, 0);
3153 mpls_label2str(nh
->nh_label
->num_labels
,
3154 nh
->nh_label
->label
, buf3
, sizeof(buf3
),
3155 nh
->nh_label_type
, 0);
3157 zlog_debug("LSP in-label %u type %d %snexthop %s out-label(s) changed to %s (old %s)",
3158 lsp
->ile
.in_label
, type
, backup_str
, buf
,
3162 /* Update out label(s), trigger processing. */
3163 if (nh
->nh_label
->num_labels
== num_out_labels
)
3164 memcpy(nh
->nh_label
->label
, out_labels
,
3165 sizeof(mpls_label_t
) * num_out_labels
);
3167 nexthop_del_labels(nh
);
3168 nexthop_add_labels(nh
, type
, num_out_labels
,
3172 /* Add LSP entry to this nexthop */
3173 nhlfe
= nhlfe_add(lsp
, type
, gtype
, gate
, ifindex
,
3174 num_out_labels
, out_labels
, is_backup
);
3178 if (IS_ZEBRA_DEBUG_MPLS
) {
3179 char buf2
[MPLS_LABEL_STRLEN
];
3181 nhlfe2str(nhlfe
, buf
, sizeof(buf
));
3182 mpls_label2str(num_out_labels
, out_labels
, buf2
,
3183 sizeof(buf2
), 0, 0);
3185 zlog_debug("Add LSP in-label %u type %d %snexthop %s out-label(s) %s",
3186 lsp
->ile
.in_label
, type
, backup_str
, buf
,
3190 lsp
->addr_family
= NHLFE_FAMILY(nhlfe
);
3193 /* Mark NHLFE, queue LSP for processing. */
3194 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_CHANGED
);
3200 * Install an LSP and forwarding entry; used primarily
3201 * from vrf zapi message processing.
3203 int mpls_lsp_install(struct zebra_vrf
*zvrf
, enum lsp_types_t type
,
3204 mpls_label_t in_label
, uint8_t num_out_labels
,
3205 const mpls_label_t
*out_labels
, enum nexthop_types_t gtype
,
3206 const union g_addr
*gate
, ifindex_t ifindex
)
3208 struct hash
*lsp_table
;
3209 struct zebra_ile tmp_ile
;
3210 struct zebra_lsp
*lsp
;
3211 struct zebra_nhlfe
*nhlfe
;
3214 lsp_table
= zvrf
->lsp_table
;
3218 /* Find or create LSP object */
3219 tmp_ile
.in_label
= in_label
;
3220 lsp
= hash_get(lsp_table
, &tmp_ile
, lsp_alloc
);
3222 nhlfe
= lsp_add_nhlfe(lsp
, type
, num_out_labels
, out_labels
, gtype
,
3223 gate
, ifindex
, false /*backup*/);
3227 /* Queue LSP for processing. */
3228 if (lsp_processq_add(lsp
))
3235 * Install or replace NHLFE, using info from zapi nexthop
3237 static int lsp_znh_install(struct zebra_lsp
*lsp
, enum lsp_types_t type
,
3238 const struct zapi_nexthop
*znh
)
3240 struct zebra_nhlfe
*nhlfe
;
3242 nhlfe
= lsp_add_nhlfe(lsp
, type
, znh
->label_num
, znh
->labels
,
3243 znh
->type
, &znh
->gate
, znh
->ifindex
,
3248 /* Update backup info if present */
3249 if (CHECK_FLAG(znh
->flags
, ZAPI_NEXTHOP_FLAG_HAS_BACKUP
)) {
3250 if (znh
->backup_num
> NEXTHOP_MAX_BACKUPS
) {
3255 nhlfe
->nexthop
->backup_num
= znh
->backup_num
;
3256 memcpy(nhlfe
->nexthop
->backup_idx
, znh
->backup_idx
,
3258 SET_FLAG(nhlfe
->nexthop
->flags
, NEXTHOP_FLAG_HAS_BACKUP
);
3260 /* Ensure there's no stale backup info */
3261 UNSET_FLAG(nhlfe
->nexthop
->flags
, NEXTHOP_FLAG_HAS_BACKUP
);
3262 nhlfe
->nexthop
->backup_num
= 0;
3265 /* Queue LSP for processing. */
3266 if (lsp_processq_add(lsp
))
3273 * Install/update backup NHLFE for an LSP, using info from a zapi message.
3275 static int lsp_backup_znh_install(struct zebra_lsp
*lsp
, enum lsp_types_t type
,
3276 const struct zapi_nexthop
*znh
)
3278 struct zebra_nhlfe
*nhlfe
;
3280 nhlfe
= lsp_add_nhlfe(lsp
, type
, znh
->label_num
,
3281 znh
->labels
, znh
->type
, &znh
->gate
,
3282 znh
->ifindex
, true /*backup*/);
3283 if (nhlfe
== NULL
) {
3284 if (IS_ZEBRA_DEBUG_MPLS
)
3285 zlog_debug("%s: unable to add backup nhlfe, label: %u",
3286 __func__
, lsp
->ile
.in_label
);
3290 /* Queue LSP for processing. */
3291 if (lsp_processq_add(lsp
))
3297 struct zebra_lsp
*mpls_lsp_find(struct zebra_vrf
*zvrf
, mpls_label_t in_label
)
3299 struct hash
*lsp_table
;
3300 struct zebra_ile tmp_ile
;
3303 lsp_table
= zvrf
->lsp_table
;
3307 /* If entry is not present, exit. */
3308 tmp_ile
.in_label
= in_label
;
3309 return hash_lookup(lsp_table
, &tmp_ile
);
3313 * Uninstall a particular NHLFE in the forwarding table. If this is
3314 * the only NHLFE, the entire LSP forwarding entry has to be deleted.
3316 int mpls_lsp_uninstall(struct zebra_vrf
*zvrf
, enum lsp_types_t type
,
3317 mpls_label_t in_label
, enum nexthop_types_t gtype
,
3318 const union g_addr
*gate
, ifindex_t ifindex
,
3321 struct hash
*lsp_table
;
3322 struct zebra_ile tmp_ile
;
3323 struct zebra_lsp
*lsp
;
3324 struct zebra_nhlfe
*nhlfe
;
3325 char buf
[NEXTHOP_STRLEN
];
3326 bool schedule_lsp
= false;
3329 lsp_table
= zvrf
->lsp_table
;
3333 /* If entry is not present, exit. */
3334 tmp_ile
.in_label
= in_label
;
3335 lsp
= hash_lookup(lsp_table
, &tmp_ile
);
3340 nhlfe
= nhlfe_find(&lsp
->backup_nhlfe_list
, type
, gtype
,
3343 nhlfe
= nhlfe_find(&lsp
->nhlfe_list
, type
, gtype
, gate
,
3348 if (IS_ZEBRA_DEBUG_MPLS
) {
3349 nhlfe2str(nhlfe
, buf
, sizeof(buf
));
3350 zlog_debug("Del LSP in-label %u type %d nexthop %s flags 0x%x",
3351 in_label
, type
, buf
, nhlfe
->flags
);
3354 if (CHECK_FLAG(lsp
->flags
, LSP_FLAG_INSTALLED
) ||
3355 CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
))
3356 schedule_lsp
= true;
3358 /* Mark NHLFE for delete or directly delete, as appropriate. */
3360 SET_FLAG(nhlfe
->flags
, NHLFE_FLAG_DELETED
);
3361 UNSET_FLAG(nhlfe
->flags
, NHLFE_FLAG_CHANGED
);
3363 if (IS_ZEBRA_DEBUG_MPLS
)
3364 zlog_debug("Schedule LSP in-label %u flags 0x%x",
3365 lsp
->ile
.in_label
, lsp
->flags
);
3366 if (lsp_processq_add(lsp
))
3371 /* Free LSP entry if no other NHLFEs and not scheduled. */
3372 lsp_check_free(lsp_table
, &lsp
);
3377 int mpls_lsp_uninstall_all_vrf(struct zebra_vrf
*zvrf
, enum lsp_types_t type
,
3378 mpls_label_t in_label
)
3380 struct hash
*lsp_table
;
3381 struct zebra_ile tmp_ile
;
3382 struct zebra_lsp
*lsp
;
3385 lsp_table
= zvrf
->lsp_table
;
3389 /* If entry is not present, exit. */
3390 tmp_ile
.in_label
= in_label
;
3391 lsp
= hash_lookup(lsp_table
, &tmp_ile
);
3395 return mpls_lsp_uninstall_all(lsp_table
, lsp
, type
);
3399 * Uninstall all NHLFEs for a particular LSP forwarding entry.
3400 * If no other NHLFEs exist, the entry would be deleted.
3402 static void mpls_lsp_uninstall_all_type(struct hash_bucket
*bucket
, void *ctxt
)
3404 struct lsp_uninstall_args
*args
= ctxt
;
3405 struct zebra_lsp
*lsp
;
3406 struct hash
*lsp_table
;
3408 lsp
= (struct zebra_lsp
*)bucket
->data
;
3409 if (nhlfe_list_first(&lsp
->nhlfe_list
) == NULL
)
3412 lsp_table
= args
->lsp_table
;
3416 mpls_lsp_uninstall_all(lsp_table
, lsp
, args
->type
);
3420 * Uninstall all FEC-To-NHLFE (FTN) bindings of the given address-family and
3423 static void mpls_ftn_uninstall_all(struct zebra_vrf
*zvrf
,
3424 int afi
, enum lsp_types_t lsp_type
)
3426 struct route_table
*table
;
3427 struct route_node
*rn
;
3428 struct route_entry
*re
;
3429 struct nexthop
*nexthop
;
3430 struct nexthop_group
*nhg
;
3433 /* Process routes of interested address-families. */
3434 table
= zebra_vrf_table(afi
, SAFI_UNICAST
, zvrf_id(zvrf
));
3438 for (rn
= route_top(table
); rn
; rn
= route_next(rn
)) {
3441 RNODE_FOREACH_RE (rn
, re
) {
3442 struct nhg_hash_entry
*new_nhe
;
3444 new_nhe
= zebra_nhe_copy(re
->nhe
, 0);
3446 nhg
= &new_nhe
->nhg
;
3447 for (nexthop
= nhg
->nexthop
; nexthop
;
3448 nexthop
= nexthop
->next
) {
3449 if (nexthop
->nh_label_type
!= lsp_type
)
3452 nexthop_del_labels(nexthop
);
3453 SET_FLAG(re
->status
, ROUTE_ENTRY_CHANGED
);
3454 SET_FLAG(re
->status
,
3455 ROUTE_ENTRY_LABELS_CHANGED
);
3459 /* Check for backup info and update that also */
3460 nhg
= zebra_nhg_get_backup_nhg(new_nhe
);
3462 for (nexthop
= nhg
->nexthop
; nexthop
;
3463 nexthop
= nexthop
->next
) {
3464 if (nexthop
->nh_label_type
!= lsp_type
)
3467 nexthop_del_labels(nexthop
);
3468 SET_FLAG(re
->status
,
3469 ROUTE_ENTRY_CHANGED
);
3470 SET_FLAG(re
->status
,
3471 ROUTE_ENTRY_LABELS_CHANGED
);
3476 if (CHECK_FLAG(re
->status
, ROUTE_ENTRY_LABELS_CHANGED
))
3477 mpls_zebra_nhe_update(re
, afi
, new_nhe
);
3479 zebra_nhg_free(new_nhe
);
3487 #if defined(HAVE_CUMULUS)
3489 * Check that the label values used in LSP creation are consistent. The
3490 * main criteria is that if there is ECMP, the label operation must still
3491 * be consistent - i.e., all paths either do a swap or do PHP. This is due
3492 * to current HW restrictions.
3494 int zebra_mpls_lsp_label_consistent(struct zebra_vrf
*zvrf
,
3495 mpls_label_t in_label
,
3496 mpls_label_t out_label
,
3497 enum nexthop_types_t gtype
,
3498 union g_addr
*gate
, ifindex_t ifindex
)
3500 struct hash
*slsp_table
;
3501 struct zebra_ile tmp_ile
;
3502 struct zebra_lsp
*lsp
;
3503 struct zebra_nhlfe
*nhlfe
;
3504 const struct nexthop
*nh
;
3507 slsp_table
= zvrf
->slsp_table
;
3511 /* If entry is not present, exit. */
3512 tmp_ile
.in_label
= in_label
;
3513 lsp
= hash_lookup(slsp_table
, &tmp_ile
);
3517 nhlfe
= nhlfe_find(&lsp
->nhlfe_list
, ZEBRA_LSP_STATIC
,
3518 gtype
, gate
, ifindex
);
3520 nh
= nhlfe
->nexthop
;
3522 if (nh
== NULL
|| nh
->nh_label
== NULL
)
3525 if (nh
->nh_label
->label
[0] == out_label
)
3528 /* If not only NHLFE, cannot allow label change. */
3529 if (nhlfe
!= nhlfe_list_first(&lsp
->nhlfe_list
) ||
3530 nhlfe_list_next(&lsp
->nhlfe_list
, nhlfe
) != NULL
)
3533 /* If other NHLFEs exist, label operation must match. */
3534 nhlfe
= nhlfe_list_first(&lsp
->nhlfe_list
);
3535 if (nhlfe
!= NULL
) {
3538 nh
= nhlfe
->nexthop
;
3540 if (nh
== NULL
|| nh
->nh_label
== NULL
)
3543 cur_op
= (nh
->nh_label
->label
[0] ==
3544 MPLS_LABEL_IMPLICIT_NULL
);
3545 new_op
= (out_label
== MPLS_LABEL_IMPLICIT_NULL
);
3546 if (cur_op
!= new_op
)
3551 /* Label values are good. */
3554 #endif /* HAVE_CUMULUS */
3557 * Add static LSP entry. This may be the first entry for this incoming label
3558 * or an additional nexthop; an existing entry may also have outgoing label
3560 * Note: The label operation (swap or PHP) is common for the LSP entry (all
3563 int zebra_mpls_static_lsp_add(struct zebra_vrf
*zvrf
, mpls_label_t in_label
,
3564 mpls_label_t out_label
,
3565 enum nexthop_types_t gtype
, union g_addr
*gate
,
3568 struct hash
*slsp_table
;
3569 struct zebra_ile tmp_ile
;
3570 struct zebra_lsp
*lsp
;
3571 struct zebra_nhlfe
*nhlfe
;
3575 slsp_table
= zvrf
->slsp_table
;
3579 /* Find or create LSP. */
3580 tmp_ile
.in_label
= in_label
;
3581 lsp
= hash_get(slsp_table
, &tmp_ile
, lsp_alloc
);
3583 nhlfe
= nhlfe_find(&lsp
->nhlfe_list
, ZEBRA_LSP_STATIC
, gtype
, gate
,
3586 struct nexthop
*nh
= nhlfe
->nexthop
;
3589 assert(nh
->nh_label
);
3591 /* Compare existing nexthop */
3592 if (nh
->nh_label
->num_labels
== 1 &&
3593 nh
->nh_label
->label
[0] == out_label
)
3597 if (IS_ZEBRA_DEBUG_MPLS
) {
3598 nhlfe2str(nhlfe
, buf
, sizeof(buf
));
3600 "Upd static LSP in-label %u nexthop %s out-label %u (old %u)",
3601 in_label
, buf
, out_label
,
3602 nh
->nh_label
->label
[0]);
3604 if (nh
->nh_label
->num_labels
== 1)
3605 nh
->nh_label
->label
[0] = out_label
;
3607 nexthop_del_labels(nh
);
3608 nexthop_add_labels(nh
, ZEBRA_LSP_STATIC
, 1, &out_label
);
3612 /* Add static LSP entry to this nexthop */
3613 nhlfe
= nhlfe_add(lsp
, ZEBRA_LSP_STATIC
, gtype
, gate
,
3614 ifindex
, 1, &out_label
, false /*backup*/);
3618 if (IS_ZEBRA_DEBUG_MPLS
) {
3619 nhlfe2str(nhlfe
, buf
, sizeof(buf
));
3621 "Add static LSP in-label %u nexthop %s out-label %u",
3622 in_label
, buf
, out_label
);
3626 /* (Re)Install LSP in the main table. */
3627 if (mpls_lsp_install(zvrf
, ZEBRA_LSP_STATIC
, in_label
, 1, &out_label
,
3628 gtype
, gate
, ifindex
))
3635 * Delete static LSP entry. This may be the delete of one particular
3636 * NHLFE for this incoming label or the delete of the entire entry (i.e.,
3638 * NOTE: Delete of the only NHLFE will also end up deleting the entire
3639 * LSP configuration.
3641 int zebra_mpls_static_lsp_del(struct zebra_vrf
*zvrf
, mpls_label_t in_label
,
3642 enum nexthop_types_t gtype
, union g_addr
*gate
,
3645 struct hash
*slsp_table
;
3646 struct zebra_ile tmp_ile
;
3647 struct zebra_lsp
*lsp
;
3648 struct zebra_nhlfe
*nhlfe
;
3651 slsp_table
= zvrf
->slsp_table
;
3655 /* If entry is not present, exit. */
3656 tmp_ile
.in_label
= in_label
;
3657 lsp
= hash_lookup(slsp_table
, &tmp_ile
);
3661 /* Is it delete of entire LSP or a specific NHLFE? */
3662 if (gtype
== NEXTHOP_TYPE_BLACKHOLE
) {
3663 if (IS_ZEBRA_DEBUG_MPLS
)
3664 zlog_debug("Del static LSP in-label %u", in_label
);
3666 /* Uninstall entire LSP from the main table. */
3667 mpls_static_lsp_uninstall_all(zvrf
, in_label
);
3669 /* Delete all static NHLFEs */
3670 frr_each_safe(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
3674 /* Find specific NHLFE, exit if not found. */
3675 nhlfe
= nhlfe_find(&lsp
->nhlfe_list
, ZEBRA_LSP_STATIC
,
3676 gtype
, gate
, ifindex
);
3680 if (IS_ZEBRA_DEBUG_MPLS
) {
3682 nhlfe2str(nhlfe
, buf
, sizeof(buf
));
3683 zlog_debug("Del static LSP in-label %u nexthop %s",
3687 /* Uninstall LSP from the main table. */
3688 mpls_lsp_uninstall(zvrf
, ZEBRA_LSP_STATIC
, in_label
, gtype
,
3689 gate
, ifindex
, false);
3691 /* Delete static LSP NHLFE */
3695 /* Remove entire static LSP entry if no NHLFE - valid in either case
3698 if (nhlfe_list_first(&lsp
->nhlfe_list
) == NULL
) {
3699 lsp
= hash_release(slsp_table
, &tmp_ile
);
3700 lsp_free_nhlfe(lsp
);
3701 XFREE(MTYPE_LSP
, lsp
);
3708 * Schedule all MPLS label forwarding entries for processing.
3709 * Called upon changes that may affect one or more of them such as
3710 * interface or nexthop state changes.
3712 void zebra_mpls_lsp_schedule(struct zebra_vrf
*zvrf
)
3716 hash_iterate(zvrf
->lsp_table
, lsp_schedule
, NULL
);
3720 * Display MPLS label forwarding table for a specific LSP
3721 * (VTY command handler).
3723 void zebra_mpls_print_lsp(struct vty
*vty
, struct zebra_vrf
*zvrf
,
3724 mpls_label_t label
, bool use_json
)
3726 struct hash
*lsp_table
;
3727 struct zebra_lsp
*lsp
;
3728 struct zebra_ile tmp_ile
;
3729 json_object
*json
= NULL
;
3732 lsp_table
= zvrf
->lsp_table
;
3735 vty_out(vty
, "{}\n");
3739 /* If entry is not present, exit. */
3740 tmp_ile
.in_label
= label
;
3741 lsp
= hash_lookup(lsp_table
, &tmp_ile
);
3744 vty_out(vty
, "{}\n");
3749 json
= lsp_json(lsp
);
3750 vty_json(vty
, json
);
3752 lsp_print(vty
, lsp
);
3756 * Display MPLS label forwarding table (VTY command handler).
3758 void zebra_mpls_print_lsp_table(struct vty
*vty
, struct zebra_vrf
*zvrf
,
3762 json_object
*json
= NULL
;
3763 struct zebra_lsp
*lsp
= NULL
;
3764 struct zebra_nhlfe
*nhlfe
= NULL
;
3765 struct listnode
*node
= NULL
;
3766 struct list
*lsp_list
= hash_get_sorted_list(zvrf
->lsp_table
, lsp_cmp
);
3769 json
= json_object_new_object();
3771 for (ALL_LIST_ELEMENTS_RO(lsp_list
, node
, lsp
))
3772 json_object_object_add(json
,
3773 label2str(lsp
->ile
.in_label
, 0,
3777 vty_json(vty
, json
);
3781 /* Prepare table. */
3782 tt
= ttable_new(&ttable_styles
[TTSTYLE_BLANK
]);
3783 ttable_add_row(tt
, "Inbound Label|Type|Nexthop|Outbound Label");
3784 tt
->style
.cell
.rpad
= 2;
3785 tt
->style
.corner
= '+';
3787 ttable_rowseps(tt
, 0, BOTTOM
, true, '-');
3789 for (ALL_LIST_ELEMENTS_RO(lsp_list
, node
, lsp
)) {
3790 frr_each_safe(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
3791 struct nexthop
*nexthop
;
3792 const char *out_label_str
;
3793 char nh_buf
[NEXTHOP_STRLEN
];
3795 nexthop
= nhlfe
->nexthop
;
3797 switch (nexthop
->type
) {
3798 case NEXTHOP_TYPE_IFINDEX
: {
3799 struct zebra_ns
*zns
;
3800 struct interface
*ifp
;
3802 zns
= zebra_ns_lookup(NS_DEFAULT
);
3803 ifp
= if_lookup_by_index_per_ns(
3804 zns
, nexthop
->ifindex
);
3805 snprintf(nh_buf
, sizeof(nh_buf
), "%s",
3806 ifp
? ifp
->name
: "Null");
3809 case NEXTHOP_TYPE_IPV4
:
3810 case NEXTHOP_TYPE_IPV4_IFINDEX
:
3811 inet_ntop(AF_INET
, &nexthop
->gate
.ipv4
,
3812 nh_buf
, sizeof(nh_buf
));
3814 case NEXTHOP_TYPE_IPV6
:
3815 case NEXTHOP_TYPE_IPV6_IFINDEX
:
3816 inet_ntop(AF_INET6
, &nexthop
->gate
.ipv6
,
3817 nh_buf
, sizeof(nh_buf
));
3819 case NEXTHOP_TYPE_BLACKHOLE
:
3823 if (nexthop
->type
!= NEXTHOP_TYPE_IFINDEX
)
3824 out_label_str
= mpls_label2str(
3825 nexthop
->nh_label
->num_labels
,
3826 &nexthop
->nh_label
->label
[0],
3828 nexthop
->nh_label_type
, 1);
3830 out_label_str
= "-";
3832 ttable_add_row(tt
, "%u|%s|%s|%s",
3834 nhlfe_type2str(nhlfe
->type
),
3835 nh_buf
, out_label_str
);
3839 /* Dump the generated table. */
3840 if (tt
->nrows
> 1) {
3841 char *table
= ttable_dump(tt
, "\n");
3842 vty_out(vty
, "%s\n", table
);
3843 XFREE(MTYPE_TMP
, table
);
3848 list_delete(&lsp_list
);
3852 * Create printable string for static LSP configuration.
3854 static char *nhlfe_config_str(const struct zebra_nhlfe
*nhlfe
, char *buf
,
3857 const struct nexthop
*nh
;
3859 nh
= nhlfe
->nexthop
;
3863 case NEXTHOP_TYPE_IPV4
:
3864 case NEXTHOP_TYPE_IPV4_IFINDEX
:
3865 inet_ntop(AF_INET
, &nh
->gate
.ipv4
, buf
, size
);
3867 strlcat(buf
, ifindex2ifname(nh
->ifindex
, VRF_DEFAULT
),
3870 case NEXTHOP_TYPE_IPV6
:
3871 case NEXTHOP_TYPE_IPV6_IFINDEX
:
3872 inet_ntop(AF_INET6
, &nh
->gate
.ipv6
, buf
, size
);
3875 ifindex2ifname(nh
->ifindex
, VRF_DEFAULT
),
3878 case NEXTHOP_TYPE_IFINDEX
:
3881 ifindex2ifname(nh
->ifindex
, VRF_DEFAULT
),
3884 case NEXTHOP_TYPE_BLACKHOLE
:
3892 * Display MPLS LSP configuration of all static LSPs (VTY command handler).
3894 int zebra_mpls_write_lsp_config(struct vty
*vty
, struct zebra_vrf
*zvrf
)
3896 struct zebra_lsp
*lsp
;
3897 struct zebra_nhlfe
*nhlfe
;
3899 struct listnode
*node
;
3900 struct list
*slsp_list
=
3901 hash_get_sorted_list(zvrf
->slsp_table
, lsp_cmp
);
3903 for (ALL_LIST_ELEMENTS_RO(slsp_list
, node
, lsp
)) {
3904 frr_each(nhlfe_list
, &lsp
->nhlfe_list
, nhlfe
) {
3908 nh
= nhlfe
->nexthop
;
3909 if (nh
== NULL
|| nh
->nh_label
== NULL
)
3912 nhlfe_config_str(nhlfe
, buf
, sizeof(buf
));
3914 switch (nh
->nh_label
->label
[0]) {
3915 case MPLS_LABEL_IPV4_EXPLICIT_NULL
:
3916 case MPLS_LABEL_IPV6_EXPLICIT_NULL
:
3917 strlcpy(lstr
, "explicit-null", sizeof(lstr
));
3919 case MPLS_LABEL_IMPLICIT_NULL
:
3920 strlcpy(lstr
, "implicit-null", sizeof(lstr
));
3923 snprintf(lstr
, sizeof(lstr
), "%u",
3924 nh
->nh_label
->label
[0]);
3928 vty_out(vty
, "mpls lsp %u %s %s\n", lsp
->ile
.in_label
,
3933 list_delete(&slsp_list
);
3934 return (zvrf
->slsp_table
->count
? 1 : 0);
3938 * Add/update global label block.
3940 int zebra_mpls_label_block_add(struct zebra_vrf
*zvrf
, uint32_t start_label
,
3943 zvrf
->mpls_srgb
.start_label
= start_label
;
3944 zvrf
->mpls_srgb
.end_label
= end_label
;
3946 /* Evaluate registered FECs to see if any get a label or not. */
3952 * Delete global label block.
3954 int zebra_mpls_label_block_del(struct zebra_vrf
*zvrf
)
3956 zvrf
->mpls_srgb
.start_label
= MPLS_DEFAULT_MIN_SRGB_LABEL
;
3957 zvrf
->mpls_srgb
.end_label
= MPLS_DEFAULT_MAX_SRGB_LABEL
;
3959 /* Process registered FECs to clear their local label, if needed. */
3965 * Display MPLS global label block configuration (VTY command handler).
3967 int zebra_mpls_write_label_block_config(struct vty
*vty
, struct zebra_vrf
*zvrf
)
3969 if (zvrf
->mpls_srgb
.start_label
== 0)
3972 if ((zvrf
->mpls_srgb
.start_label
!= MPLS_DEFAULT_MIN_SRGB_LABEL
)
3973 || (zvrf
->mpls_srgb
.end_label
!= MPLS_DEFAULT_MAX_SRGB_LABEL
)) {
3974 vty_out(vty
, "mpls label global-block %u %u\n",
3975 zvrf
->mpls_srgb
.start_label
, zvrf
->mpls_srgb
.end_label
);
3982 * Called when VRF becomes inactive, cleans up information but keeps
3985 void zebra_mpls_cleanup_tables(struct zebra_vrf
*zvrf
)
3987 struct zebra_vrf
*def_zvrf
;
3990 if (zvrf_id(zvrf
) == VRF_DEFAULT
)
3991 hash_iterate(zvrf
->lsp_table
, lsp_uninstall_from_kernel
, NULL
);
3994 * For other vrfs, we try to remove associated LSPs; we locate
3995 * the LSPs in the default vrf.
3997 def_zvrf
= zebra_vrf_lookup_by_id(VRF_DEFAULT
);
3999 /* At shutdown, the default may be gone already */
4000 if (def_zvrf
== NULL
)
4003 for (afi
= AFI_IP
; afi
< AFI_MAX
; afi
++) {
4004 if (zvrf
->label
[afi
] != MPLS_LABEL_NONE
)
4005 lsp_uninstall(def_zvrf
, zvrf
->label
[afi
]);
4011 * When a vrf label is assigned and the client goes away
4012 * we should cleanup the vrf labels associated with
4015 void zebra_mpls_client_cleanup_vrf_label(uint8_t proto
)
4018 struct zebra_vrf
*def_zvrf
= zebra_vrf_lookup_by_id(VRF_DEFAULT
);
4020 if (def_zvrf
== NULL
)
4023 RB_FOREACH (vrf
, vrf_id_head
, &vrfs_by_id
) {
4024 struct zebra_vrf
*zvrf
= vrf
->info
;
4030 for (afi
= AFI_IP
; afi
< AFI_MAX
; afi
++) {
4031 if (zvrf
->label_proto
[afi
] == proto
4032 && zvrf
->label
[afi
] != MPLS_LABEL_NONE
)
4033 lsp_uninstall(def_zvrf
, zvrf
->label
[afi
]);
4036 * Cleanup data structures by fiat
4038 zvrf
->label_proto
[afi
] = 0;
4039 zvrf
->label
[afi
] = MPLS_LABEL_NONE
;
4044 static void lsp_table_free(void *p
)
4046 struct zebra_lsp
*lsp
= p
;
4048 lsp_free_nhlfe(lsp
);
4050 XFREE(MTYPE_LSP
, lsp
);
4054 * Called upon process exiting, need to delete LSP forwarding
4055 * entries from the kernel.
4056 * NOTE: Currently supported only for default VRF.
4058 void zebra_mpls_close_tables(struct zebra_vrf
*zvrf
)
4060 hash_iterate(zvrf
->lsp_table
, lsp_uninstall_from_kernel
, NULL
);
4061 hash_clean_and_free(&zvrf
->lsp_table
, lsp_table_free
);
4062 hash_clean_and_free(&zvrf
->slsp_table
, lsp_table_free
);
4063 route_table_finish(zvrf
->fec_table
[AFI_IP
]);
4064 route_table_finish(zvrf
->fec_table
[AFI_IP6
]);
4068 * Allocate MPLS tables for this VRF and do other initialization.
4069 * NOTE: Currently supported only for default VRF.
4071 void zebra_mpls_init_tables(struct zebra_vrf
*zvrf
)
4078 snprintf(buffer
, sizeof(buffer
), "ZEBRA SLSP table: %s",
4080 zvrf
->slsp_table
= hash_create_size(8, label_hash
, label_cmp
, buffer
);
4082 snprintf(buffer
, sizeof(buffer
), "ZEBRA LSP table: %s",
4084 zvrf
->lsp_table
= hash_create_size(8, label_hash
, label_cmp
, buffer
);
4085 zvrf
->fec_table
[AFI_IP
] = route_table_init();
4086 zvrf
->fec_table
[AFI_IP6
] = route_table_init();
4087 zvrf
->mpls_flags
= 0;
4088 zvrf
->mpls_srgb
.start_label
= MPLS_DEFAULT_MIN_SRGB_LABEL
;
4089 zvrf
->mpls_srgb
.end_label
= MPLS_DEFAULT_MAX_SRGB_LABEL
;
4092 void zebra_mpls_turned_on(void)
4094 if (!mpls_enabled
) {
4095 mpls_processq_init();
4096 mpls_enabled
= true;
4099 hook_register(zserv_client_close
, zebra_mpls_cleanup_fecs_for_client
);
4100 hook_register(zserv_client_close
, zebra_mpls_cleanup_zclient_labels
);
4104 * Global MPLS initialization.
4106 void zebra_mpls_init(void)
4108 mpls_enabled
= false;
4109 mpls_pw_reach_strict
= false;
4111 if (mpls_kernel_init() < 0) {
4112 flog_warn(EC_ZEBRA_MPLS_SUPPORT_DISABLED
,
4113 "Disabling MPLS support (no kernel support)");
4117 zebra_mpls_turned_on();