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Merge pull request #11564 from kuldeepkash/multicast_pim_bsm
[mirror_frr.git] / zebra / zebra_evpn_neigh.c
1 /*
2 * Zebra EVPN Neighbor code
3 * Copyright (C) 2016, 2017 Cumulus Networks, Inc.
4 *
5 * This file is part of FRR.
6 *
7 * FRR is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2, or (at your option) any
10 * later version.
11 *
12 * FRR is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with FRR; see the file COPYING. If not, write to the Free
19 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
20 * 02111-1307, USA.
21 */
22
23 #include <zebra.h>
24
25 #include "hash.h"
26 #include "interface.h"
27 #include "jhash.h"
28 #include "memory.h"
29 #include "prefix.h"
30 #include "vlan.h"
31 #include "json.h"
32
33 #include "zebra/zserv.h"
34 #include "zebra/debug.h"
35 #include "zebra/zebra_router.h"
36 #include "zebra/rt.h"
37 #include "zebra/zebra_errors.h"
38 #include "zebra/zebra_vrf.h"
39 #include "zebra/zebra_evpn.h"
40 #include "zebra/zebra_evpn_mh.h"
41 #include "zebra/zebra_evpn_neigh.h"
42 #include "zebra/zebra_evpn_mac.h"
43
44 DEFINE_MTYPE_STATIC(ZEBRA, NEIGH, "EVI Neighbor");
45
46 /*
47 * Make hash key for neighbors.
48 */
49 static unsigned int neigh_hash_keymake(const void *p)
50 {
51 const struct zebra_neigh *n = p;
52 const struct ipaddr *ip = &n->ip;
53
54 if (IS_IPADDR_V4(ip))
55 return jhash_1word(ip->ipaddr_v4.s_addr, 0);
56
57 return jhash2(ip->ipaddr_v6.s6_addr32,
58 array_size(ip->ipaddr_v6.s6_addr32), 0);
59 }
60
61 /*
62 * Compare two neighbor hash structures.
63 */
64 static bool neigh_cmp(const void *p1, const void *p2)
65 {
66 const struct zebra_neigh *n1 = p1;
67 const struct zebra_neigh *n2 = p2;
68
69 if (n1 == NULL && n2 == NULL)
70 return true;
71
72 if (n1 == NULL || n2 == NULL)
73 return false;
74
75 return ipaddr_cmp(&n1->ip, &n2->ip) == 0;
76 }
77
78 int neigh_list_cmp(void *p1, void *p2)
79 {
80 const struct zebra_neigh *n1 = p1;
81 const struct zebra_neigh *n2 = p2;
82
83 return ipaddr_cmp(&n1->ip, &n2->ip);
84 }
85
86 struct hash *zebra_neigh_db_create(const char *desc)
87 {
88 return hash_create_size(8, neigh_hash_keymake, neigh_cmp, desc);
89 }
90
91 uint32_t num_dup_detected_neighs(struct zebra_evpn *zevpn)
92 {
93 unsigned int i;
94 uint32_t num_neighs = 0;
95 struct hash *hash;
96 struct hash_bucket *hb;
97 struct zebra_neigh *nbr;
98
99 hash = zevpn->neigh_table;
100 if (!hash)
101 return num_neighs;
102 for (i = 0; i < hash->size; i++) {
103 for (hb = hash->index[i]; hb; hb = hb->next) {
104 nbr = (struct zebra_neigh *)hb->data;
105 if (CHECK_FLAG(nbr->flags, ZEBRA_NEIGH_DUPLICATE))
106 num_neighs++;
107 }
108 }
109
110 return num_neighs;
111 }
112
113 /*
114 * Helper function to determine maximum width of neighbor IP address for
115 * display - just because we're dealing with IPv6 addresses that can
116 * widely vary.
117 */
118 void zebra_evpn_find_neigh_addr_width(struct hash_bucket *bucket, void *ctxt)
119 {
120 struct zebra_neigh *n;
121 char buf[INET6_ADDRSTRLEN];
122 struct neigh_walk_ctx *wctx = ctxt;
123 int width;
124
125 n = (struct zebra_neigh *)bucket->data;
126
127 ipaddr2str(&n->ip, buf, sizeof(buf));
128 width = strlen(buf);
129 if (width > wctx->addr_width)
130 wctx->addr_width = width;
131 }
132
133 /*
134 * Count of remote neighbors referencing this MAC.
135 */
136 int remote_neigh_count(struct zebra_mac *zmac)
137 {
138 struct zebra_neigh *n = NULL;
139 struct listnode *node = NULL;
140 int count = 0;
141
142 for (ALL_LIST_ELEMENTS_RO(zmac->neigh_list, node, n)) {
143 if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_REMOTE))
144 count++;
145 }
146
147 return count;
148 }
149
150 /*
151 * Install remote neighbor into the kernel.
152 */
153 int zebra_evpn_rem_neigh_install(struct zebra_evpn *zevpn,
154 struct zebra_neigh *n, bool was_static)
155 {
156 struct interface *vlan_if;
157 int flags;
158 int ret = 0;
159
160 if (!(n->flags & ZEBRA_NEIGH_REMOTE))
161 return 0;
162
163 vlan_if = zevpn_map_to_svi(zevpn);
164 if (!vlan_if)
165 return -1;
166
167 flags = DPLANE_NTF_EXT_LEARNED;
168 if (n->flags & ZEBRA_NEIGH_ROUTER_FLAG)
169 flags |= DPLANE_NTF_ROUTER;
170 ZEBRA_NEIGH_SET_ACTIVE(n);
171
172 dplane_rem_neigh_add(vlan_if, &n->ip, &n->emac, flags, was_static);
173
174 return ret;
175 }
176
177 /*
178 * Install neighbor hash entry - called upon access VLAN change.
179 */
180 void zebra_evpn_install_neigh_hash(struct hash_bucket *bucket, void *ctxt)
181 {
182 struct zebra_neigh *n;
183 struct neigh_walk_ctx *wctx = ctxt;
184
185 n = (struct zebra_neigh *)bucket->data;
186
187 if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_REMOTE))
188 zebra_evpn_rem_neigh_install(wctx->zevpn, n,
189 false /*was_static*/);
190 }
191
192 /*
193 * Callback to allocate neighbor hash entry.
194 */
195 static void *zebra_evpn_neigh_alloc(void *p)
196 {
197 const struct zebra_neigh *tmp_n = p;
198 struct zebra_neigh *n;
199
200 n = XCALLOC(MTYPE_NEIGH, sizeof(struct zebra_neigh));
201 *n = *tmp_n;
202
203 return ((void *)n);
204 }
205
206 static void zebra_evpn_local_neigh_ref_mac(struct zebra_neigh *n,
207 const struct ethaddr *macaddr,
208 struct zebra_mac *mac,
209 bool send_mac_update)
210 {
211 bool old_static;
212 bool new_static;
213
214 memcpy(&n->emac, macaddr, ETH_ALEN);
215 n->mac = mac;
216
217 /* Link to new MAC */
218 if (!mac)
219 return;
220
221 listnode_add_sort(mac->neigh_list, n);
222 if (n->flags & ZEBRA_NEIGH_ALL_PEER_FLAGS) {
223 old_static = zebra_evpn_mac_is_static(mac);
224 ++mac->sync_neigh_cnt;
225 new_static = zebra_evpn_mac_is_static(mac);
226 if (IS_ZEBRA_DEBUG_EVPN_MH_NEIGH)
227 zlog_debug(
228 "sync-neigh ref mac vni %u ip %pIA mac %pEA ref %d",
229 n->zevpn->vni, &n->ip, &n->emac,
230 mac->sync_neigh_cnt);
231 if ((old_static != new_static) && send_mac_update)
232 /* program the local mac in the kernel */
233 zebra_evpn_sync_mac_dp_install(
234 mac, false /*set_inactive*/,
235 false /*force_clear_static*/, __func__);
236 }
237 }
238
239 /* sync-path that is active on an ES peer */
240 static void zebra_evpn_sync_neigh_dp_install(struct zebra_neigh *n,
241 bool set_inactive,
242 bool force_clear_static,
243 const char *caller)
244 {
245 struct zebra_ns *zns;
246 struct interface *ifp;
247 bool set_static;
248 bool set_router;
249
250 zns = zebra_ns_lookup(NS_DEFAULT);
251 ifp = if_lookup_by_index_per_ns(zns, n->ifindex);
252 if (!ifp) {
253 if (IS_ZEBRA_DEBUG_EVPN_MH_NEIGH)
254 zlog_debug(
255 "%s: dp-install sync-neigh vni %u ip %pIA mac %pEA if %d f 0x%x skipped",
256 caller, n->zevpn->vni, &n->ip, &n->emac,
257 n->ifindex, n->flags);
258 return;
259 }
260
261 if (force_clear_static)
262 set_static = false;
263 else
264 set_static = zebra_evpn_neigh_is_static(n);
265
266 set_router = !!CHECK_FLAG(n->flags, ZEBRA_NEIGH_ROUTER_FLAG);
267
268 /* XXX - this will change post integration with the new kernel */
269 if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_LOCAL_INACTIVE))
270 set_inactive = true;
271
272 if (IS_ZEBRA_DEBUG_EVPN_MH_NEIGH)
273 zlog_debug(
274 "%s: dp-install sync-neigh vni %u ip %pIA mac %pEA if %s(%d) f 0x%x%s%s%s",
275 caller, n->zevpn->vni, &n->ip, &n->emac,
276 ifp->name, n->ifindex, n->flags,
277 set_router ? " router" : "",
278 set_static ? " static" : "",
279 set_inactive ? " inactive" : "");
280 dplane_local_neigh_add(ifp, &n->ip, &n->emac, set_router, set_static,
281 set_inactive);
282 }
283
284 /*
285 * Inform BGP about local neighbor addition.
286 */
287 int zebra_evpn_neigh_send_add_to_client(vni_t vni, const struct ipaddr *ip,
288 const struct ethaddr *macaddr,
289 struct zebra_mac *zmac,
290 uint32_t neigh_flags, uint32_t seq)
291 {
292 uint8_t flags = 0;
293
294 if (CHECK_FLAG(neigh_flags, ZEBRA_NEIGH_LOCAL_INACTIVE)) {
295 /* host reachability has not been verified locally */
296
297 /* if no ES peer is claiming reachability we can't advertise
298 * the entry
299 */
300 if (!CHECK_FLAG(neigh_flags, ZEBRA_NEIGH_ES_PEER_ACTIVE))
301 return 0;
302
303 /* ES peers are claiming reachability; we will
304 * advertise the entry but with a proxy flag
305 */
306 SET_FLAG(flags, ZEBRA_MACIP_TYPE_PROXY_ADVERT);
307 }
308
309 if (CHECK_FLAG(neigh_flags, ZEBRA_NEIGH_DEF_GW))
310 SET_FLAG(flags, ZEBRA_MACIP_TYPE_GW);
311 /* Set router flag (R-bit) based on local neigh entry add */
312 if (CHECK_FLAG(neigh_flags, ZEBRA_NEIGH_ROUTER_FLAG))
313 SET_FLAG(flags, ZEBRA_MACIP_TYPE_ROUTER_FLAG);
314 if (CHECK_FLAG(neigh_flags, ZEBRA_NEIGH_SVI_IP))
315 SET_FLAG(flags, ZEBRA_MACIP_TYPE_SVI_IP);
316
317 return zebra_evpn_macip_send_msg_to_client(vni, macaddr, ip, flags, seq,
318 ZEBRA_NEIGH_ACTIVE, zmac->es,
319 ZEBRA_MACIP_ADD);
320 }
321
322 /*
323 * Inform BGP about local neighbor deletion.
324 */
325 int zebra_evpn_neigh_send_del_to_client(vni_t vni, struct ipaddr *ip,
326 struct ethaddr *macaddr, uint32_t flags,
327 int state, bool force)
328 {
329 if (!force) {
330 if (CHECK_FLAG(flags, ZEBRA_NEIGH_LOCAL_INACTIVE)
331 && !CHECK_FLAG(flags, ZEBRA_NEIGH_ES_PEER_ACTIVE))
332 /* the neigh was not advertised - nothing to delete */
333 return 0;
334 }
335
336 return zebra_evpn_macip_send_msg_to_client(
337 vni, macaddr, ip, flags, 0, state, NULL, ZEBRA_MACIP_DEL);
338 }
339
340 static void zebra_evpn_neigh_send_add_del_to_client(struct zebra_neigh *n,
341 bool old_bgp_ready,
342 bool new_bgp_ready)
343 {
344 if (new_bgp_ready)
345 zebra_evpn_neigh_send_add_to_client(n->zevpn->vni, &n->ip,
346 &n->emac, n->mac, n->flags,
347 n->loc_seq);
348 else if (old_bgp_ready)
349 zebra_evpn_neigh_send_del_to_client(n->zevpn->vni, &n->ip,
350 &n->emac, n->flags,
351 n->state, true /*force*/);
352 }
353
354 /* if the static flag associated with the neigh changes we need
355 * to update the sync-neigh references against the MAC
356 * and inform the dataplane about the static flag changes.
357 */
358 void zebra_evpn_sync_neigh_static_chg(struct zebra_neigh *n, bool old_n_static,
359 bool new_n_static, bool defer_n_dp,
360 bool defer_mac_dp, const char *caller)
361 {
362 struct zebra_mac *mac = n->mac;
363 bool old_mac_static;
364 bool new_mac_static;
365
366 if (old_n_static == new_n_static)
367 return;
368
369 /* update the neigh sync references in the dataplane. if
370 * the neigh is in the middle of updates the caller can
371 * request for a defer
372 */
373 if (!defer_n_dp)
374 zebra_evpn_sync_neigh_dp_install(n, false /* set_inactive */,
375 false /* force_clear_static */,
376 __func__);
377
378 if (!mac)
379 return;
380
381 /* update the mac sync ref cnt */
382 old_mac_static = zebra_evpn_mac_is_static(mac);
383 if (new_n_static) {
384 ++mac->sync_neigh_cnt;
385 } else if (old_n_static) {
386 if (mac->sync_neigh_cnt)
387 --mac->sync_neigh_cnt;
388 }
389 new_mac_static = zebra_evpn_mac_is_static(mac);
390
391 /* update the mac sync references in the dataplane */
392 if ((old_mac_static != new_mac_static) && !defer_mac_dp)
393 zebra_evpn_sync_mac_dp_install(mac, false /* set_inactive */,
394 false /* force_clear_static */,
395 __func__);
396
397 if (IS_ZEBRA_DEBUG_EVPN_MH_NEIGH)
398 zlog_debug(
399 "sync-neigh ref-chg vni %u ip %pIA mac %pEA f 0x%x %d%s%s%s%s by %s",
400 n->zevpn->vni, &n->ip, &n->emac, n->flags,
401 mac->sync_neigh_cnt,
402 old_n_static ? " old_n_static" : "",
403 new_n_static ? " new_n_static" : "",
404 old_mac_static ? " old_mac_static" : "",
405 new_mac_static ? " new_mac_static" : "", caller);
406 }
407
408 /* Neigh hold timer is used to age out peer-active flag.
409 *
410 * During this wait time we expect the dataplane component or an
411 * external neighmgr daemon to probe existing hosts to independently
412 * establish their presence on the ES.
413 */
414 static void zebra_evpn_neigh_hold_exp_cb(struct thread *t)
415 {
416 struct zebra_neigh *n;
417 bool old_bgp_ready;
418 bool new_bgp_ready;
419 bool old_n_static;
420 bool new_n_static;
421
422 n = THREAD_ARG(t);
423 /* the purpose of the hold timer is to age out the peer-active
424 * flag
425 */
426 if (!CHECK_FLAG(n->flags, ZEBRA_NEIGH_ES_PEER_ACTIVE))
427 return;
428
429 old_bgp_ready = zebra_evpn_neigh_is_ready_for_bgp(n);
430 old_n_static = zebra_evpn_neigh_is_static(n);
431 UNSET_FLAG(n->flags, ZEBRA_NEIGH_ES_PEER_ACTIVE);
432 new_bgp_ready = zebra_evpn_neigh_is_ready_for_bgp(n);
433 new_n_static = zebra_evpn_neigh_is_static(n);
434
435 if (IS_ZEBRA_DEBUG_EVPN_MH_NEIGH)
436 zlog_debug("sync-neigh vni %u ip %pIA mac %pEA 0x%x hold expired",
437 n->zevpn->vni, &n->ip, &n->emac, n->flags);
438
439 /* re-program the local neigh in the dataplane if the neigh is no
440 * longer static
441 */
442 if (old_n_static != new_n_static)
443 zebra_evpn_sync_neigh_static_chg(
444 n, old_n_static, new_n_static, false /*defer_n_dp*/,
445 false /*defer_mac_dp*/, __func__);
446
447 /* inform bgp if needed */
448 if (old_bgp_ready != new_bgp_ready)
449 zebra_evpn_neigh_send_add_del_to_client(n, old_bgp_ready,
450 new_bgp_ready);
451 }
452
453 static inline void zebra_evpn_neigh_start_hold_timer(struct zebra_neigh *n)
454 {
455 if (n->hold_timer)
456 return;
457
458 if (IS_ZEBRA_DEBUG_EVPN_MH_NEIGH)
459 zlog_debug("sync-neigh vni %u ip %pIA mac %pEA 0x%x hold start",
460 n->zevpn->vni, &n->ip, &n->emac, n->flags);
461 thread_add_timer(zrouter.master, zebra_evpn_neigh_hold_exp_cb, n,
462 zmh_info->neigh_hold_time, &n->hold_timer);
463 }
464
465 static void zebra_evpn_local_neigh_deref_mac(struct zebra_neigh *n,
466 bool send_mac_update)
467 {
468 struct zebra_mac *mac = n->mac;
469 struct zebra_evpn *zevpn = n->zevpn;
470 bool old_static;
471 bool new_static;
472
473 n->mac = NULL;
474 if (!mac)
475 return;
476
477 if ((n->flags & ZEBRA_NEIGH_ALL_PEER_FLAGS) && mac->sync_neigh_cnt) {
478 old_static = zebra_evpn_mac_is_static(mac);
479 --mac->sync_neigh_cnt;
480 new_static = zebra_evpn_mac_is_static(mac);
481 if (IS_ZEBRA_DEBUG_EVPN_MH_NEIGH)
482 zlog_debug(
483 "sync-neigh deref mac vni %u ip %pIA mac %pEA ref %d",
484 n->zevpn->vni, &n->ip, &n->emac,
485 mac->sync_neigh_cnt);
486 if ((old_static != new_static) && send_mac_update)
487 /* program the local mac in the kernel */
488 zebra_evpn_sync_mac_dp_install(
489 mac, false /* set_inactive */,
490 false /* force_clear_static */, __func__);
491 }
492
493 listnode_delete(mac->neigh_list, n);
494 zebra_evpn_deref_ip2mac(zevpn, mac);
495 }
496
497 bool zebra_evpn_neigh_is_bgp_seq_ok(struct zebra_evpn *zevpn,
498 struct zebra_neigh *n,
499 const struct ethaddr *macaddr, uint32_t seq,
500 bool sync)
501 {
502 uint32_t tmp_seq;
503 const char *n_type;
504
505 if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_LOCAL)) {
506 tmp_seq = n->loc_seq;
507 n_type = "local";
508 } else {
509 tmp_seq = n->rem_seq;
510 n_type = "remote";
511 }
512
513 if (seq < tmp_seq) {
514 /* if the neigh was never advertised to bgp we must accept
515 * whatever sequence number bgp sends
516 * XXX - check with Vivek
517 */
518 if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_LOCAL)
519 && !zebra_evpn_neigh_is_ready_for_bgp(n)) {
520 if (IS_ZEBRA_DEBUG_EVPN_MH_NEIGH
521 || IS_ZEBRA_DEBUG_VXLAN)
522 zlog_debug(
523 "%s-macip accept vni %u %s mac %pEA IP %pIA lower seq %u f 0x%x",
524 sync ? "sync" : "remote", zevpn->vni,
525 n_type, macaddr, &n->ip,
526 tmp_seq, n->flags);
527 return true;
528 }
529
530 if (IS_ZEBRA_DEBUG_EVPN_MH_NEIGH || IS_ZEBRA_DEBUG_VXLAN)
531 zlog_debug(
532 "%s-macip ignore vni %u %s mac %pEA IP %pIA as existing has higher seq %u f 0x%x",
533 sync ? "sync" : "remote", zevpn->vni, n_type,
534 macaddr, &n->ip, tmp_seq, n->flags);
535 return false;
536 }
537
538 return true;
539 }
540
541 /*
542 * Add neighbor entry.
543 */
544 static struct zebra_neigh *zebra_evpn_neigh_add(struct zebra_evpn *zevpn,
545 const struct ipaddr *ip,
546 const struct ethaddr *mac,
547 struct zebra_mac *zmac,
548 uint32_t n_flags)
549 {
550 struct zebra_neigh tmp_n;
551 struct zebra_neigh *n = NULL;
552
553 memset(&tmp_n, 0, sizeof(tmp_n));
554 memcpy(&tmp_n.ip, ip, sizeof(struct ipaddr));
555 n = hash_get(zevpn->neigh_table, &tmp_n, zebra_evpn_neigh_alloc);
556
557 n->state = ZEBRA_NEIGH_INACTIVE;
558 n->zevpn = zevpn;
559 n->dad_ip_auto_recovery_timer = NULL;
560 n->flags = n_flags;
561 n->uptime = monotime(NULL);
562
563 if (!zmac)
564 zmac = zebra_evpn_mac_lookup(zevpn, mac);
565 zebra_evpn_local_neigh_ref_mac(n, mac, zmac,
566 false /* send_mac_update */);
567
568 return n;
569 }
570
571 /*
572 * Delete neighbor entry.
573 */
574 int zebra_evpn_neigh_del(struct zebra_evpn *zevpn, struct zebra_neigh *n)
575 {
576 struct zebra_neigh *tmp_n;
577
578 if (n->mac)
579 listnode_delete(n->mac->neigh_list, n);
580
581 /* Cancel auto recovery */
582 THREAD_OFF(n->dad_ip_auto_recovery_timer);
583
584 /* Cancel proxy hold timer */
585 zebra_evpn_neigh_stop_hold_timer(n);
586
587 /* Free the VNI hash entry and allocated memory. */
588 tmp_n = hash_release(zevpn->neigh_table, n);
589 XFREE(MTYPE_NEIGH, tmp_n);
590
591 return 0;
592 }
593
594 void zebra_evpn_sync_neigh_del(struct zebra_neigh *n)
595 {
596 bool old_n_static;
597 bool new_n_static;
598
599 if (IS_ZEBRA_DEBUG_EVPN_MH_NEIGH)
600 zlog_debug("sync-neigh del vni %u ip %pIA mac %pEA f 0x%x",
601 n->zevpn->vni, &n->ip, &n->emac, n->flags);
602
603 old_n_static = zebra_evpn_neigh_is_static(n);
604 UNSET_FLAG(n->flags, ZEBRA_NEIGH_ES_PEER_PROXY);
605 if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_ES_PEER_ACTIVE))
606 zebra_evpn_neigh_start_hold_timer(n);
607 new_n_static = zebra_evpn_neigh_is_static(n);
608
609 if (old_n_static != new_n_static)
610 zebra_evpn_sync_neigh_static_chg(
611 n, old_n_static, new_n_static, false /*defer-dp*/,
612 false /*defer_mac_dp*/, __func__);
613 }
614
615 struct zebra_neigh *zebra_evpn_proc_sync_neigh_update(
616 struct zebra_evpn *zevpn, struct zebra_neigh *n, uint16_t ipa_len,
617 const struct ipaddr *ipaddr, uint8_t flags, uint32_t seq,
618 const esi_t *esi, struct sync_mac_ip_ctx *ctx)
619 {
620 struct interface *ifp = NULL;
621 bool is_router;
622 struct zebra_mac *mac = ctx->mac;
623 uint32_t tmp_seq;
624 bool old_router = false;
625 bool old_bgp_ready = false;
626 bool new_bgp_ready;
627 bool inform_dataplane = false;
628 bool inform_bgp = false;
629 bool old_mac_static;
630 bool new_mac_static;
631 bool set_dp_inactive = false;
632 bool created;
633 ifindex_t ifindex = 0;
634
635 /* locate l3-svi */
636 ifp = zevpn_map_to_svi(zevpn);
637 if (ifp)
638 ifindex = ifp->ifindex;
639
640 is_router = !!CHECK_FLAG(flags, ZEBRA_MACIP_TYPE_ROUTER_FLAG);
641 old_mac_static = zebra_evpn_mac_is_static(mac);
642
643 if (!n) {
644 uint32_t n_flags = 0;
645
646 /* New neighbor - create */
647 SET_FLAG(n_flags, ZEBRA_NEIGH_LOCAL);
648 if (CHECK_FLAG(flags, ZEBRA_MACIP_TYPE_PROXY_ADVERT))
649 SET_FLAG(n_flags, ZEBRA_NEIGH_ES_PEER_PROXY);
650 else
651 SET_FLAG(n_flags, ZEBRA_NEIGH_ES_PEER_ACTIVE);
652 SET_FLAG(n_flags, ZEBRA_NEIGH_LOCAL_INACTIVE);
653
654 n = zebra_evpn_neigh_add(zevpn, ipaddr, &mac->macaddr, mac,
655 n_flags);
656 n->ifindex = ifindex;
657 ZEBRA_NEIGH_SET_ACTIVE(n);
658
659 created = true;
660 inform_dataplane = true;
661 inform_bgp = true;
662 set_dp_inactive = true;
663 } else {
664 bool mac_change;
665 uint32_t old_flags = n->flags;
666 bool old_n_static;
667 bool new_n_static;
668
669 created = false;
670 old_n_static = zebra_evpn_neigh_is_static(n);
671 old_bgp_ready = zebra_evpn_neigh_is_ready_for_bgp(n);
672 old_router = !!CHECK_FLAG(n->flags, ZEBRA_NEIGH_ROUTER_FLAG);
673
674 mac_change = !!memcmp(&n->emac, &mac->macaddr, ETH_ALEN);
675
676 /* deref and clear old info */
677 if (mac_change) {
678 if (old_bgp_ready) {
679 zebra_evpn_neigh_send_del_to_client(
680 zevpn->vni, &n->ip, &n->emac, n->flags,
681 n->state, false /*force*/);
682 old_bgp_ready = false;
683 }
684 zebra_evpn_local_neigh_deref_mac(n,
685 false /*send_mac_update*/);
686 }
687 /* clear old fwd info */
688 n->rem_seq = 0;
689 n->r_vtep_ip.s_addr = 0;
690
691 /* setup new flags */
692 n->flags = 0;
693 SET_FLAG(n->flags, ZEBRA_NEIGH_LOCAL);
694 /* retain activity flag if the neigh was
695 * previously local
696 */
697 if (old_flags & ZEBRA_NEIGH_LOCAL) {
698 n->flags |= (old_flags & ZEBRA_NEIGH_LOCAL_INACTIVE);
699 } else {
700 inform_dataplane = true;
701 set_dp_inactive = true;
702 n->flags |= ZEBRA_NEIGH_LOCAL_INACTIVE;
703 }
704
705 if (CHECK_FLAG(flags, ZEBRA_MACIP_TYPE_PROXY_ADVERT)) {
706 SET_FLAG(n->flags, ZEBRA_NEIGH_ES_PEER_PROXY);
707 /* if the neigh was peer-active previously we
708 * need to keep the flag and start the
709 * holdtimer on it. the peer-active flag is
710 * cleared on holdtimer expiry.
711 */
712 if (CHECK_FLAG(old_flags, ZEBRA_NEIGH_ES_PEER_ACTIVE)) {
713 SET_FLAG(n->flags, ZEBRA_NEIGH_ES_PEER_ACTIVE);
714 zebra_evpn_neigh_start_hold_timer(n);
715 }
716 } else {
717 SET_FLAG(n->flags, ZEBRA_NEIGH_ES_PEER_ACTIVE);
718 /* stop hold timer if a peer has verified
719 * reachability
720 */
721 zebra_evpn_neigh_stop_hold_timer(n);
722 }
723 ZEBRA_NEIGH_SET_ACTIVE(n);
724
725 if (IS_ZEBRA_DEBUG_EVPN_MH_NEIGH && (old_flags != n->flags))
726 zlog_debug(
727 "sync-neigh vni %u ip %pIA mac %pEA old_f 0x%x new_f 0x%x",
728 n->zevpn->vni, &n->ip, &n->emac,
729 old_flags, n->flags);
730
731 new_n_static = zebra_evpn_neigh_is_static(n);
732 if (mac_change) {
733 set_dp_inactive = true;
734 n->flags |= ZEBRA_NEIGH_LOCAL_INACTIVE;
735 inform_dataplane = true;
736 zebra_evpn_local_neigh_ref_mac(
737 n, &mac->macaddr, mac,
738 false /*send_mac_update*/);
739 } else if (old_n_static != new_n_static) {
740 inform_dataplane = true;
741 /* if static flags have changed without a mac change
742 * we need to create the correct sync-refs against
743 * the existing mac
744 */
745 zebra_evpn_sync_neigh_static_chg(
746 n, old_n_static, new_n_static,
747 true /*defer_dp*/, true /*defer_mac_dp*/,
748 __func__);
749 }
750
751 /* Update the forwarding info. */
752 if (n->ifindex != ifindex) {
753 n->ifindex = ifindex;
754 inform_dataplane = true;
755 }
756
757 n->uptime = monotime(NULL);
758 }
759
760 /* update the neigh seq. we don't bother with the mac seq as
761 * sync_mac_update already took care of that
762 */
763 tmp_seq = MAX(n->loc_seq, seq);
764 if (tmp_seq != n->loc_seq) {
765 n->loc_seq = tmp_seq;
766 inform_bgp = true;
767 }
768
769 /* Mark Router flag (R-bit) */
770 if (is_router)
771 SET_FLAG(n->flags, ZEBRA_NEIGH_ROUTER_FLAG);
772 else
773 UNSET_FLAG(n->flags, ZEBRA_NEIGH_ROUTER_FLAG);
774
775 if (old_router != is_router)
776 inform_dataplane = true;
777
778 new_bgp_ready = zebra_evpn_neigh_is_ready_for_bgp(n);
779 if (old_bgp_ready != new_bgp_ready)
780 inform_bgp = true;
781
782 new_mac_static = zebra_evpn_mac_is_static(mac);
783 if ((old_mac_static != new_mac_static) || ctx->mac_dp_update_deferred)
784 zebra_evpn_sync_mac_dp_install(mac, ctx->mac_inactive,
785 false /* force_clear_static */,
786 __func__);
787
788 if (IS_ZEBRA_DEBUG_EVPN_MH_NEIGH)
789 zlog_debug(
790 "sync-neigh %s vni %u ip %pIA mac %pEA if %s(%d) seq %d f 0x%x%s%s",
791 created ? "created" : "updated", n->zevpn->vni,
792 &n->ip, &n->emac,
793 ifp ? ifp->name : "", ifindex, n->loc_seq, n->flags,
794 inform_bgp ? " inform_bgp" : "",
795 inform_dataplane ? " inform_dp" : "");
796
797 if (inform_dataplane)
798 zebra_evpn_sync_neigh_dp_install(n, set_dp_inactive,
799 false /* force_clear_static */,
800 __func__);
801
802 if (inform_bgp)
803 zebra_evpn_neigh_send_add_del_to_client(n, old_bgp_ready,
804 new_bgp_ready);
805
806 return n;
807 }
808
809 /*
810 * Uninstall remote neighbor from the kernel.
811 */
812 static int zebra_evpn_neigh_uninstall(struct zebra_evpn *zevpn,
813 struct zebra_neigh *n)
814 {
815 struct interface *vlan_if;
816
817 if (!(n->flags & ZEBRA_NEIGH_REMOTE))
818 return 0;
819
820 vlan_if = zevpn_map_to_svi(zevpn);
821 if (!vlan_if)
822 return -1;
823
824 ZEBRA_NEIGH_SET_INACTIVE(n);
825 n->loc_seq = 0;
826
827 dplane_rem_neigh_delete(vlan_if, &n->ip);
828
829 return 0;
830 }
831
832 /*
833 * Free neighbor hash entry (callback)
834 */
835 static void zebra_evpn_neigh_del_hash_entry(struct hash_bucket *bucket,
836 void *arg)
837 {
838 struct neigh_walk_ctx *wctx = arg;
839 struct zebra_neigh *n = bucket->data;
840
841 if (((wctx->flags & DEL_LOCAL_NEIGH) && (n->flags & ZEBRA_NEIGH_LOCAL))
842 || ((wctx->flags & DEL_REMOTE_NEIGH)
843 && (n->flags & ZEBRA_NEIGH_REMOTE))
844 || ((wctx->flags & DEL_REMOTE_NEIGH_FROM_VTEP)
845 && (n->flags & ZEBRA_NEIGH_REMOTE)
846 && IPV4_ADDR_SAME(&n->r_vtep_ip, &wctx->r_vtep_ip))) {
847 if (wctx->upd_client && (n->flags & ZEBRA_NEIGH_LOCAL))
848 zebra_evpn_neigh_send_del_to_client(
849 wctx->zevpn->vni, &n->ip, &n->emac, n->flags,
850 n->state, false /*force*/);
851
852 if (wctx->uninstall) {
853 if (zebra_evpn_neigh_is_static(n))
854 zebra_evpn_sync_neigh_dp_install(
855 n, false /* set_inactive */,
856 true /* force_clear_static */,
857 __func__);
858 if ((n->flags & ZEBRA_NEIGH_REMOTE))
859 zebra_evpn_neigh_uninstall(wctx->zevpn, n);
860 }
861
862 zebra_evpn_neigh_del(wctx->zevpn, n);
863 }
864
865 return;
866 }
867
868 /*
869 * Delete all neighbor entries for this EVPN.
870 */
871 void zebra_evpn_neigh_del_all(struct zebra_evpn *zevpn, int uninstall,
872 int upd_client, uint32_t flags)
873 {
874 struct neigh_walk_ctx wctx;
875
876 if (!zevpn->neigh_table)
877 return;
878
879 memset(&wctx, 0, sizeof(wctx));
880 wctx.zevpn = zevpn;
881 wctx.uninstall = uninstall;
882 wctx.upd_client = upd_client;
883 wctx.flags = flags;
884
885 hash_iterate(zevpn->neigh_table, zebra_evpn_neigh_del_hash_entry,
886 &wctx);
887 }
888
889 /*
890 * Look up neighbor hash entry.
891 */
892 struct zebra_neigh *zebra_evpn_neigh_lookup(struct zebra_evpn *zevpn,
893 const struct ipaddr *ip)
894 {
895 struct zebra_neigh tmp;
896 struct zebra_neigh *n;
897
898 memset(&tmp, 0, sizeof(tmp));
899 memcpy(&tmp.ip, ip, sizeof(struct ipaddr));
900 n = hash_lookup(zevpn->neigh_table, &tmp);
901
902 return n;
903 }
904
905 /*
906 * Process all neighbors associated with a MAC upon the MAC being learnt
907 * locally or undergoing any other change (such as sequence number).
908 */
909 void zebra_evpn_process_neigh_on_local_mac_change(struct zebra_evpn *zevpn,
910 struct zebra_mac *zmac,
911 bool seq_change,
912 bool es_change)
913 {
914 struct zebra_neigh *n = NULL;
915 struct listnode *node = NULL;
916 struct zebra_vrf *zvrf = NULL;
917
918 zvrf = zevpn->vxlan_if->vrf->info;
919
920 if (IS_ZEBRA_DEBUG_VXLAN)
921 zlog_debug("Processing neighbors on local MAC %pEA %s, VNI %u",
922 &zmac->macaddr, seq_change ? "CHANGE" : "ADD",
923 zevpn->vni);
924
925 /* Walk all neighbors and mark any inactive local neighbors as
926 * active and/or update sequence number upon a move, and inform BGP.
927 * The action for remote neighbors is TBD.
928 * NOTE: We can't simply uninstall remote neighbors as the kernel may
929 * accidentally end up deleting a just-learnt local neighbor.
930 */
931 for (ALL_LIST_ELEMENTS_RO(zmac->neigh_list, node, n)) {
932 if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_LOCAL)) {
933 if (IS_ZEBRA_NEIGH_INACTIVE(n) || seq_change
934 || es_change) {
935 ZEBRA_NEIGH_SET_ACTIVE(n);
936 n->loc_seq = zmac->loc_seq;
937 if (!(zebra_evpn_do_dup_addr_detect(zvrf)
938 && zvrf->dad_freeze
939 && !!CHECK_FLAG(n->flags,
940 ZEBRA_NEIGH_DUPLICATE)))
941 zebra_evpn_neigh_send_add_to_client(
942 zevpn->vni, &n->ip, &n->emac,
943 n->mac, n->flags, n->loc_seq);
944 }
945 }
946 }
947 }
948
949 /*
950 * Process all neighbors associated with a local MAC upon the MAC being
951 * deleted.
952 */
953 void zebra_evpn_process_neigh_on_local_mac_del(struct zebra_evpn *zevpn,
954 struct zebra_mac *zmac)
955 {
956 struct zebra_neigh *n = NULL;
957 struct listnode *node = NULL;
958
959 if (IS_ZEBRA_DEBUG_VXLAN)
960 zlog_debug("Processing neighbors on local MAC %pEA DEL, VNI %u",
961 &zmac->macaddr, zevpn->vni);
962
963 /* Walk all local neighbors and mark as inactive and inform
964 * BGP, if needed.
965 * TBD: There is currently no handling for remote neighbors. We
966 * don't expect them to exist, if they do, do we install the MAC
967 * as a remote MAC and the neighbor as remote?
968 */
969 for (ALL_LIST_ELEMENTS_RO(zmac->neigh_list, node, n)) {
970 if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_LOCAL)) {
971 if (IS_ZEBRA_NEIGH_ACTIVE(n)) {
972 ZEBRA_NEIGH_SET_INACTIVE(n);
973 n->loc_seq = 0;
974 zebra_evpn_neigh_send_del_to_client(
975 zevpn->vni, &n->ip, &n->emac, n->flags,
976 ZEBRA_NEIGH_ACTIVE, false /*force*/);
977 }
978 }
979 }
980 }
981
982 /*
983 * Process all neighbors associated with a MAC upon the MAC being remotely
984 * learnt.
985 */
986 void zebra_evpn_process_neigh_on_remote_mac_add(struct zebra_evpn *zevpn,
987 struct zebra_mac *zmac)
988 {
989 struct zebra_neigh *n = NULL;
990 struct listnode *node = NULL;
991
992 if (IS_ZEBRA_DEBUG_VXLAN)
993 zlog_debug("Processing neighbors on remote MAC %pEA ADD, VNI %u",
994 &zmac->macaddr, zevpn->vni);
995
996 /* Walk all local neighbors and mark as inactive and inform
997 * BGP, if needed.
998 */
999 for (ALL_LIST_ELEMENTS_RO(zmac->neigh_list, node, n)) {
1000 if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_LOCAL)) {
1001 if (IS_ZEBRA_NEIGH_ACTIVE(n)) {
1002 ZEBRA_NEIGH_SET_INACTIVE(n);
1003 n->loc_seq = 0;
1004 zebra_evpn_neigh_send_del_to_client(
1005 zevpn->vni, &n->ip, &n->emac, n->flags,
1006 ZEBRA_NEIGH_ACTIVE, false /* force */);
1007 }
1008 }
1009 }
1010 }
1011
1012 /*
1013 * Process all neighbors associated with a remote MAC upon the MAC being
1014 * deleted.
1015 */
1016 void zebra_evpn_process_neigh_on_remote_mac_del(struct zebra_evpn *zevpn,
1017 struct zebra_mac *zmac)
1018 {
1019 /* NOTE: Currently a NO-OP. */
1020 }
1021
1022 static inline void zebra_evpn_local_neigh_update_log(
1023 const char *pfx, struct zebra_neigh *n, bool is_router,
1024 bool local_inactive, bool old_bgp_ready, bool new_bgp_ready,
1025 bool inform_dataplane, bool inform_bgp, const char *sfx)
1026 {
1027 if (!IS_ZEBRA_DEBUG_EVPN_MH_NEIGH)
1028 return;
1029
1030 zlog_debug("%s neigh vni %u ip %pIA mac %pEA f 0x%x%s%s%s%s%s%s %s", pfx,
1031 n->zevpn->vni, &n->ip, &n->emac, n->flags,
1032 is_router ? " router" : "",
1033 local_inactive ? " local-inactive" : "",
1034 old_bgp_ready ? " old_bgp_ready" : "",
1035 new_bgp_ready ? " new_bgp_ready" : "",
1036 inform_dataplane ? " inform_dp" : "",
1037 inform_bgp ? " inform_bgp" : "", sfx);
1038 }
1039
1040 /* As part Duplicate Address Detection (DAD) for IP mobility
1041 * MAC binding changes, ensure to inherit duplicate flag
1042 * from MAC.
1043 */
1044 static int zebra_evpn_ip_inherit_dad_from_mac(struct zebra_vrf *zvrf,
1045 struct zebra_mac *old_zmac,
1046 struct zebra_mac *new_zmac,
1047 struct zebra_neigh *nbr)
1048 {
1049 bool is_old_mac_dup = false;
1050 bool is_new_mac_dup = false;
1051
1052 if (!zebra_evpn_do_dup_addr_detect(zvrf))
1053 return 0;
1054 /* Check old or new MAC is detected as duplicate
1055 * mark this neigh as duplicate
1056 */
1057 if (old_zmac)
1058 is_old_mac_dup =
1059 CHECK_FLAG(old_zmac->flags, ZEBRA_MAC_DUPLICATE);
1060 if (new_zmac)
1061 is_new_mac_dup =
1062 CHECK_FLAG(new_zmac->flags, ZEBRA_MAC_DUPLICATE);
1063 /* Old and/or new MAC can be in duplicate state,
1064 * based on that IP/Neigh Inherits the flag.
1065 * If New MAC is marked duplicate, inherit to the IP.
1066 * If old MAC is duplicate but new MAC is not, clear
1067 * duplicate flag for IP and reset detection params
1068 * and let IP DAD retrigger.
1069 */
1070 if (is_new_mac_dup && !CHECK_FLAG(nbr->flags, ZEBRA_NEIGH_DUPLICATE)) {
1071 SET_FLAG(nbr->flags, ZEBRA_NEIGH_DUPLICATE);
1072 /* Capture Duplicate detection time */
1073 nbr->dad_dup_detect_time = monotime(NULL);
1074 /* Mark neigh inactive */
1075 ZEBRA_NEIGH_SET_INACTIVE(nbr);
1076
1077 return 1;
1078 } else if (is_old_mac_dup && !is_new_mac_dup) {
1079 UNSET_FLAG(nbr->flags, ZEBRA_NEIGH_DUPLICATE);
1080 nbr->dad_count = 0;
1081 nbr->detect_start_time.tv_sec = 0;
1082 nbr->detect_start_time.tv_usec = 0;
1083 }
1084 return 0;
1085 }
1086
1087 static void zebra_evpn_dad_ip_auto_recovery_exp(struct thread *t)
1088 {
1089 struct zebra_vrf *zvrf = NULL;
1090 struct zebra_neigh *nbr = NULL;
1091 struct zebra_evpn *zevpn = NULL;
1092
1093 nbr = THREAD_ARG(t);
1094
1095 /* since this is asynchronous we need sanity checks*/
1096 zvrf = vrf_info_lookup(nbr->zevpn->vrf_id);
1097 if (!zvrf)
1098 return;
1099
1100 zevpn = zebra_evpn_lookup(nbr->zevpn->vni);
1101 if (!zevpn)
1102 return;
1103
1104 nbr = zebra_evpn_neigh_lookup(zevpn, &nbr->ip);
1105 if (!nbr)
1106 return;
1107
1108 if (IS_ZEBRA_DEBUG_VXLAN)
1109 zlog_debug(
1110 "%s: duplicate addr MAC %pEA IP %pIA flags 0x%x learn count %u vni %u auto recovery expired",
1111 __func__, &nbr->emac, &nbr->ip, nbr->flags,
1112 nbr->dad_count, zevpn->vni);
1113
1114 UNSET_FLAG(nbr->flags, ZEBRA_NEIGH_DUPLICATE);
1115 nbr->dad_count = 0;
1116 nbr->detect_start_time.tv_sec = 0;
1117 nbr->detect_start_time.tv_usec = 0;
1118 nbr->dad_dup_detect_time = 0;
1119 nbr->dad_ip_auto_recovery_timer = NULL;
1120 ZEBRA_NEIGH_SET_ACTIVE(nbr);
1121
1122 /* Send to BGP */
1123 if (CHECK_FLAG(nbr->flags, ZEBRA_NEIGH_LOCAL)) {
1124 zebra_evpn_neigh_send_add_to_client(zevpn->vni, &nbr->ip,
1125 &nbr->emac, nbr->mac,
1126 nbr->flags, nbr->loc_seq);
1127 } else if (!!CHECK_FLAG(nbr->flags, ZEBRA_NEIGH_REMOTE)) {
1128 zebra_evpn_rem_neigh_install(zevpn, nbr, false /*was_static*/);
1129 }
1130 }
1131
1132 static void zebra_evpn_dup_addr_detect_for_neigh(
1133 struct zebra_vrf *zvrf, struct zebra_neigh *nbr, struct in_addr vtep_ip,
1134 bool do_dad, bool *is_dup_detect, bool is_local)
1135 {
1136
1137 struct timeval elapsed = {0, 0};
1138 bool reset_params = false;
1139
1140 if (!zebra_evpn_do_dup_addr_detect(zvrf))
1141 return;
1142
1143 /* IP is detected as duplicate or inherit dup
1144 * state, hold on to install as remote entry
1145 * only if freeze is enabled.
1146 */
1147 if (CHECK_FLAG(nbr->flags, ZEBRA_NEIGH_DUPLICATE)) {
1148 if (IS_ZEBRA_DEBUG_VXLAN)
1149 zlog_debug(
1150 "%s: duplicate addr MAC %pEA IP %pIA flags 0x%x skip installing, learn count %u recover time %u",
1151 __func__, &nbr->emac, &nbr->ip,
1152 nbr->flags, nbr->dad_count,
1153 zvrf->dad_freeze_time);
1154
1155 if (zvrf->dad_freeze)
1156 *is_dup_detect = true;
1157
1158 /* warn-only action, neigh will be installed.
1159 * freeze action, it wil not be installed.
1160 */
1161 return;
1162 }
1163
1164 if (!do_dad)
1165 return;
1166
1167 /* Check if detection time (M-secs) expired.
1168 * Reset learn count and detection start time.
1169 * During remote mac add, count should already be 1
1170 * via local learning.
1171 */
1172 monotime_since(&nbr->detect_start_time, &elapsed);
1173 reset_params = (elapsed.tv_sec > zvrf->dad_time);
1174
1175 if (is_local && !reset_params) {
1176 /* RFC-7432: A PE/VTEP that detects a MAC mobility
1177 * event via LOCAL learning starts an M-second timer.
1178 *
1179 * NOTE: This is the START of the probe with count is
1180 * 0 during LOCAL learn event.
1181 */
1182 reset_params = !nbr->dad_count;
1183 }
1184
1185 if (reset_params) {
1186 if (IS_ZEBRA_DEBUG_VXLAN)
1187 zlog_debug(
1188 "%s: duplicate addr MAC %pEA IP %pIA flags 0x%x detection time passed, reset learn count %u",
1189 __func__, &nbr->emac, &nbr->ip,
1190 nbr->flags, nbr->dad_count);
1191 /* Reset learn count but do not start detection
1192 * during REMOTE learn event.
1193 */
1194 nbr->dad_count = 0;
1195 /* Start dup. addr detection (DAD) start time,
1196 * ONLY during LOCAL learn.
1197 */
1198 if (is_local)
1199 monotime(&nbr->detect_start_time);
1200
1201 } else if (!is_local) {
1202 /* For REMOTE IP/Neigh, increment detection count
1203 * ONLY while in probe window, once window passed,
1204 * next local learn event should trigger DAD.
1205 */
1206 nbr->dad_count++;
1207 }
1208
1209 /* For LOCAL IP/Neigh learn event, once count is reset above via either
1210 * initial/start detection time or passed the probe time, the count
1211 * needs to be incremented.
1212 */
1213 if (is_local)
1214 nbr->dad_count++;
1215
1216 if (nbr->dad_count >= zvrf->dad_max_moves) {
1217 flog_warn(
1218 EC_ZEBRA_DUP_IP_DETECTED,
1219 "VNI %u: MAC %pEA IP %pIA detected as duplicate during %s VTEP %pI4",
1220 nbr->zevpn->vni, &nbr->emac, &nbr->ip,
1221 is_local ? "local update, last" : "remote update, from",
1222 &vtep_ip);
1223
1224 SET_FLAG(nbr->flags, ZEBRA_NEIGH_DUPLICATE);
1225
1226 /* Capture Duplicate detection time */
1227 nbr->dad_dup_detect_time = monotime(NULL);
1228
1229 /* Start auto recovery timer for this IP */
1230 THREAD_OFF(nbr->dad_ip_auto_recovery_timer);
1231 if (zvrf->dad_freeze && zvrf->dad_freeze_time) {
1232 if (IS_ZEBRA_DEBUG_VXLAN)
1233 zlog_debug(
1234 "%s: duplicate addr MAC %pEA IP %pIA flags 0x%x auto recovery time %u start",
1235 __func__, &nbr->emac, &nbr->ip,
1236 nbr->flags, zvrf->dad_freeze_time);
1237
1238 thread_add_timer(zrouter.master,
1239 zebra_evpn_dad_ip_auto_recovery_exp,
1240 nbr, zvrf->dad_freeze_time,
1241 &nbr->dad_ip_auto_recovery_timer);
1242 }
1243 if (zvrf->dad_freeze)
1244 *is_dup_detect = true;
1245 }
1246 }
1247
1248 int zebra_evpn_local_neigh_update(struct zebra_evpn *zevpn,
1249 struct interface *ifp,
1250 const struct ipaddr *ip,
1251 const struct ethaddr *macaddr, bool is_router,
1252 bool local_inactive, bool dp_static)
1253 {
1254 struct zebra_vrf *zvrf;
1255 struct zebra_neigh *n = NULL;
1256 struct zebra_mac *zmac = NULL, *old_zmac = NULL;
1257 uint32_t old_mac_seq = 0, mac_new_seq = 0;
1258 bool upd_mac_seq = false;
1259 bool neigh_mac_change = false;
1260 bool neigh_on_hold = false;
1261 bool neigh_was_remote = false;
1262 bool do_dad = false;
1263 struct in_addr vtep_ip = {.s_addr = 0};
1264 bool inform_dataplane = false;
1265 bool created = false;
1266 bool new_static = false;
1267 bool old_bgp_ready = false;
1268 bool new_bgp_ready;
1269
1270 /* Check if the MAC exists. */
1271 zmac = zebra_evpn_mac_lookup(zevpn, macaddr);
1272 if (!zmac) {
1273 /* create a dummy MAC if the MAC is not already present */
1274 if (IS_ZEBRA_DEBUG_VXLAN)
1275 zlog_debug("AUTO MAC %pEA created for neigh %pIA on VNI %u",
1276 macaddr, ip, zevpn->vni);
1277
1278 zmac = zebra_evpn_mac_add(zevpn, macaddr);
1279 zebra_evpn_mac_clear_fwd_info(zmac);
1280 memset(&zmac->flags, 0, sizeof(uint32_t));
1281 SET_FLAG(zmac->flags, ZEBRA_MAC_AUTO);
1282 } else {
1283 if (CHECK_FLAG(zmac->flags, ZEBRA_MAC_REMOTE)) {
1284 /*
1285 * We don't change the MAC to local upon a neighbor
1286 * learn event, we wait for the explicit local MAC
1287 * learn. However, we have to compute its sequence
1288 * number in preparation for when it actually turns
1289 * local.
1290 */
1291 upd_mac_seq = true;
1292 }
1293 }
1294
1295 zvrf = zevpn->vxlan_if->vrf->info;
1296 if (!zvrf) {
1297 if (IS_ZEBRA_DEBUG_VXLAN)
1298 zlog_debug(" Unable to find vrf for: %d",
1299 zevpn->vxlan_if->vrf->vrf_id);
1300 return -1;
1301 }
1302
1303 /* Check if the neighbor exists. */
1304 n = zebra_evpn_neigh_lookup(zevpn, ip);
1305 if (!n) {
1306 /* New neighbor - create */
1307 n = zebra_evpn_neigh_add(zevpn, ip, macaddr, zmac, 0);
1308
1309 /* Set "local" forwarding info. */
1310 SET_FLAG(n->flags, ZEBRA_NEIGH_LOCAL);
1311 n->ifindex = ifp->ifindex;
1312 created = true;
1313 } else {
1314 if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_LOCAL)) {
1315 bool mac_different;
1316 bool cur_is_router;
1317 bool old_local_inactive;
1318
1319 old_local_inactive = !!CHECK_FLAG(
1320 n->flags, ZEBRA_NEIGH_LOCAL_INACTIVE);
1321
1322 old_bgp_ready = zebra_evpn_neigh_is_ready_for_bgp(n);
1323
1324 /* Note any changes and see if of interest to BGP. */
1325 mac_different = !!memcmp(&n->emac, macaddr, ETH_ALEN);
1326 cur_is_router =
1327 !!CHECK_FLAG(n->flags, ZEBRA_NEIGH_ROUTER_FLAG);
1328 new_static = zebra_evpn_neigh_is_static(n);
1329 if (!mac_different && is_router == cur_is_router
1330 && old_local_inactive == local_inactive
1331 && dp_static != new_static) {
1332 if (IS_ZEBRA_DEBUG_VXLAN)
1333 zlog_debug(
1334 " Ignoring entry mac is the same and is_router == cur_is_router");
1335 n->ifindex = ifp->ifindex;
1336 return 0;
1337 }
1338
1339 old_zmac = n->mac;
1340 if (!mac_different) {
1341 /* XXX - cleanup this code duplication */
1342 bool is_neigh_freezed = false;
1343
1344 /* Only the router flag has changed. */
1345 if (is_router)
1346 SET_FLAG(n->flags,
1347 ZEBRA_NEIGH_ROUTER_FLAG);
1348 else
1349 UNSET_FLAG(n->flags,
1350 ZEBRA_NEIGH_ROUTER_FLAG);
1351
1352 if (local_inactive)
1353 SET_FLAG(n->flags,
1354 ZEBRA_NEIGH_LOCAL_INACTIVE);
1355 else
1356 UNSET_FLAG(n->flags,
1357 ZEBRA_NEIGH_LOCAL_INACTIVE);
1358 new_bgp_ready =
1359 zebra_evpn_neigh_is_ready_for_bgp(n);
1360
1361 if (dp_static != new_static)
1362 inform_dataplane = true;
1363
1364 /* Neigh is in freeze state and freeze action
1365 * is enabled, do not send update to client.
1366 */
1367 is_neigh_freezed =
1368 (zebra_evpn_do_dup_addr_detect(zvrf)
1369 && zvrf->dad_freeze
1370 && CHECK_FLAG(n->flags,
1371 ZEBRA_NEIGH_DUPLICATE));
1372
1373 zebra_evpn_local_neigh_update_log(
1374 "local", n, is_router, local_inactive,
1375 old_bgp_ready, new_bgp_ready, false,
1376 false, "flag-update");
1377
1378 if (inform_dataplane)
1379 zebra_evpn_sync_neigh_dp_install(
1380 n, false /* set_inactive */,
1381 false /* force_clear_static */,
1382 __func__);
1383
1384 /* if the neigh can no longer be advertised
1385 * remove it from bgp
1386 */
1387 if (!is_neigh_freezed) {
1388 zebra_evpn_neigh_send_add_del_to_client(
1389 n, old_bgp_ready,
1390 new_bgp_ready);
1391 } else {
1392 if (IS_ZEBRA_DEBUG_VXLAN
1393 && IS_ZEBRA_NEIGH_ACTIVE(n))
1394 zlog_debug(
1395 " Neighbor active and frozen");
1396 }
1397 return 0;
1398 }
1399
1400 /* The MAC has changed, need to issue a delete
1401 * first as this means a different MACIP route.
1402 * Also, need to do some unlinking/relinking.
1403 * We also need to update the MAC's sequence number
1404 * in different situations.
1405 */
1406 if (old_bgp_ready) {
1407 zebra_evpn_neigh_send_del_to_client(
1408 zevpn->vni, &n->ip, &n->emac, n->flags,
1409 n->state, false /*force*/);
1410 old_bgp_ready = false;
1411 }
1412 if (old_zmac) {
1413 old_mac_seq = CHECK_FLAG(old_zmac->flags,
1414 ZEBRA_MAC_REMOTE)
1415 ? old_zmac->rem_seq
1416 : old_zmac->loc_seq;
1417 neigh_mac_change = upd_mac_seq = true;
1418 zebra_evpn_local_neigh_deref_mac(
1419 n, true /* send_mac_update */);
1420 }
1421
1422 /* if mac changes abandon peer flags and tell
1423 * dataplane to clear the static flag
1424 */
1425 if (zebra_evpn_neigh_clear_sync_info(n))
1426 inform_dataplane = true;
1427 /* Update the forwarding info. */
1428 n->ifindex = ifp->ifindex;
1429
1430 /* Link to new MAC */
1431 zebra_evpn_local_neigh_ref_mac(
1432 n, macaddr, zmac, true /* send_mac_update */);
1433 } else if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_REMOTE)) {
1434 /*
1435 * Neighbor has moved from remote to local. Its
1436 * MAC could have also changed as part of the move.
1437 */
1438 if (memcmp(n->emac.octet, macaddr->octet, ETH_ALEN)
1439 != 0) {
1440 old_zmac = n->mac;
1441 if (old_zmac) {
1442 old_mac_seq =
1443 CHECK_FLAG(old_zmac->flags,
1444 ZEBRA_MAC_REMOTE)
1445 ? old_zmac->rem_seq
1446 : old_zmac->loc_seq;
1447 neigh_mac_change = upd_mac_seq = true;
1448 zebra_evpn_local_neigh_deref_mac(
1449 n, true /* send_update */);
1450 }
1451
1452 /* Link to new MAC */
1453 zebra_evpn_local_neigh_ref_mac(
1454 n, macaddr, zmac, true /*send_update*/);
1455 }
1456 /* Based on Mobility event Scenario-B from the
1457 * draft, neigh's previous state was remote treat this
1458 * event for DAD.
1459 */
1460 neigh_was_remote = true;
1461 vtep_ip = n->r_vtep_ip;
1462 /* Mark appropriately */
1463 UNSET_FLAG(n->flags, ZEBRA_NEIGH_REMOTE);
1464 n->r_vtep_ip.s_addr = INADDR_ANY;
1465 SET_FLAG(n->flags, ZEBRA_NEIGH_LOCAL);
1466 n->ifindex = ifp->ifindex;
1467 }
1468 }
1469
1470 /* If MAC was previously remote, or the neighbor had a different
1471 * MAC earlier, recompute the sequence number.
1472 */
1473 if (upd_mac_seq) {
1474 uint32_t seq1, seq2;
1475
1476 seq1 = CHECK_FLAG(zmac->flags, ZEBRA_MAC_REMOTE)
1477 ? zmac->rem_seq + 1
1478 : zmac->loc_seq;
1479 seq2 = neigh_mac_change ? old_mac_seq + 1 : 0;
1480 mac_new_seq = zmac->loc_seq < MAX(seq1, seq2) ? MAX(seq1, seq2)
1481 : zmac->loc_seq;
1482 }
1483
1484 if (local_inactive)
1485 SET_FLAG(n->flags, ZEBRA_NEIGH_LOCAL_INACTIVE);
1486 else
1487 UNSET_FLAG(n->flags, ZEBRA_NEIGH_LOCAL_INACTIVE);
1488
1489 /* Mark Router flag (R-bit) */
1490 if (is_router)
1491 SET_FLAG(n->flags, ZEBRA_NEIGH_ROUTER_FLAG);
1492 else
1493 UNSET_FLAG(n->flags, ZEBRA_NEIGH_ROUTER_FLAG);
1494
1495 /* if zebra and dataplane don't agree this is a sync entry
1496 * re-install in the dataplane */
1497 new_static = zebra_evpn_neigh_is_static(n);
1498 if (dp_static != new_static)
1499 inform_dataplane = true;
1500
1501 /* Check old and/or new MAC detected as duplicate mark
1502 * the neigh as duplicate
1503 */
1504 if (zebra_evpn_ip_inherit_dad_from_mac(zvrf, old_zmac, zmac, n)) {
1505 flog_warn(
1506 EC_ZEBRA_DUP_IP_INHERIT_DETECTED,
1507 "VNI %u: MAC %pEA IP %pIA detected as duplicate during local update, inherit duplicate from MAC",
1508 zevpn->vni, macaddr, &n->ip);
1509 }
1510
1511 /* For IP Duplicate Address Detection (DAD) is trigger,
1512 * when the event is extended mobility based on scenario-B
1513 * from the draft, IP/Neigh's MAC binding changed and
1514 * neigh's previous state was remote.
1515 */
1516 if (neigh_mac_change && neigh_was_remote)
1517 do_dad = true;
1518
1519 zebra_evpn_dup_addr_detect_for_neigh(zvrf, n, vtep_ip, do_dad,
1520 &neigh_on_hold, true);
1521
1522 if (inform_dataplane)
1523 zebra_evpn_sync_neigh_dp_install(n, false /* set_inactive */,
1524 false /* force_clear_static */,
1525 __func__);
1526
1527 /* Before we program this in BGP, we need to check if MAC is locally
1528 * learnt. If not, force neighbor to be inactive and reset its seq.
1529 */
1530 if (!CHECK_FLAG(zmac->flags, ZEBRA_MAC_LOCAL)) {
1531 zebra_evpn_local_neigh_update_log(
1532 "local", n, is_router, local_inactive, false, false,
1533 inform_dataplane, false, "auto-mac");
1534 ZEBRA_NEIGH_SET_INACTIVE(n);
1535 n->loc_seq = 0;
1536 zmac->loc_seq = mac_new_seq;
1537 return 0;
1538 }
1539
1540 zebra_evpn_local_neigh_update_log("local", n, is_router, local_inactive,
1541 false, false, inform_dataplane, true,
1542 created ? "created" : "updated");
1543
1544 /* If the MAC's sequence number has changed, inform the MAC and all
1545 * neighbors associated with the MAC to BGP, else just inform this
1546 * neighbor.
1547 */
1548 if (upd_mac_seq && zmac->loc_seq != mac_new_seq) {
1549 if (IS_ZEBRA_DEBUG_VXLAN)
1550 zlog_debug(
1551 "Seq changed for MAC %pEA VNI %u - old %u new %u",
1552 macaddr, zevpn->vni,
1553 zmac->loc_seq, mac_new_seq);
1554 zmac->loc_seq = mac_new_seq;
1555 if (zebra_evpn_mac_send_add_to_client(zevpn->vni, macaddr,
1556 zmac->flags,
1557 zmac->loc_seq, zmac->es))
1558 return -1;
1559 zebra_evpn_process_neigh_on_local_mac_change(zevpn, zmac, 1,
1560 0 /*es_change*/);
1561 return 0;
1562 }
1563
1564 n->loc_seq = zmac->loc_seq;
1565
1566 if (!neigh_on_hold) {
1567 ZEBRA_NEIGH_SET_ACTIVE(n);
1568 new_bgp_ready = zebra_evpn_neigh_is_ready_for_bgp(n);
1569 zebra_evpn_neigh_send_add_del_to_client(n, old_bgp_ready,
1570 new_bgp_ready);
1571 } else {
1572 if (IS_ZEBRA_DEBUG_VXLAN)
1573 zlog_debug(" Neighbor on hold not sending");
1574 }
1575 return 0;
1576 }
1577
1578 int zebra_evpn_remote_neigh_update(struct zebra_evpn *zevpn,
1579 struct interface *ifp,
1580 const struct ipaddr *ip,
1581 const struct ethaddr *macaddr,
1582 uint16_t state)
1583 {
1584 struct zebra_neigh *n = NULL;
1585 struct zebra_mac *zmac = NULL;
1586
1587 /* If the neighbor is unknown, there is no further action. */
1588 n = zebra_evpn_neigh_lookup(zevpn, ip);
1589 if (!n)
1590 return 0;
1591
1592 /* If a remote entry, see if it needs to be refreshed */
1593 if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_REMOTE)) {
1594 #ifdef GNU_LINUX
1595 if (state & NUD_STALE)
1596 zebra_evpn_rem_neigh_install(zevpn, n,
1597 false /*was_static*/);
1598 #endif
1599 } else {
1600 /* We got a "remote" neighbor notification for an entry
1601 * we think is local. This can happen in a multihoming
1602 * scenario - but only if the MAC is already "remote".
1603 * Just mark our entry as "remote".
1604 */
1605 zmac = zebra_evpn_mac_lookup(zevpn, macaddr);
1606 if (!zmac || !CHECK_FLAG(zmac->flags, ZEBRA_MAC_REMOTE)) {
1607 zlog_debug(
1608 "Ignore remote neigh %pIA (MAC %pEA) on L2-VNI %u - MAC unknown or local",
1609 &n->ip, macaddr, zevpn->vni);
1610 return -1;
1611 }
1612
1613 UNSET_FLAG(n->flags, ZEBRA_NEIGH_ALL_LOCAL_FLAGS);
1614 SET_FLAG(n->flags, ZEBRA_NEIGH_REMOTE);
1615 ZEBRA_NEIGH_SET_ACTIVE(n);
1616 n->r_vtep_ip = zmac->fwd_info.r_vtep_ip;
1617 }
1618
1619 return 0;
1620 }
1621
1622 /* Notify Neighbor entries to the Client, skips the GW entry */
1623 static void
1624 zebra_evpn_send_neigh_hash_entry_to_client(struct hash_bucket *bucket,
1625 void *arg)
1626 {
1627 struct mac_walk_ctx *wctx = arg;
1628 struct zebra_neigh *zn = bucket->data;
1629 struct zebra_mac *zmac = NULL;
1630
1631 if (CHECK_FLAG(zn->flags, ZEBRA_NEIGH_DEF_GW))
1632 return;
1633
1634 if (CHECK_FLAG(zn->flags, ZEBRA_NEIGH_LOCAL)
1635 && IS_ZEBRA_NEIGH_ACTIVE(zn)) {
1636 zmac = zebra_evpn_mac_lookup(wctx->zevpn, &zn->emac);
1637 if (!zmac)
1638 return;
1639
1640 zebra_evpn_neigh_send_add_to_client(wctx->zevpn->vni, &zn->ip,
1641 &zn->emac, zn->mac,
1642 zn->flags, zn->loc_seq);
1643 }
1644 }
1645
1646 /* Iterator of a specific EVPN */
1647 void zebra_evpn_send_neigh_to_client(struct zebra_evpn *zevpn)
1648 {
1649 struct neigh_walk_ctx wctx;
1650
1651 memset(&wctx, 0, sizeof(wctx));
1652 wctx.zevpn = zevpn;
1653
1654 hash_iterate(zevpn->neigh_table,
1655 zebra_evpn_send_neigh_hash_entry_to_client, &wctx);
1656 }
1657
1658 void zebra_evpn_clear_dup_neigh_hash(struct hash_bucket *bucket, void *ctxt)
1659 {
1660 struct neigh_walk_ctx *wctx = ctxt;
1661 struct zebra_neigh *nbr;
1662 struct zebra_evpn *zevpn;
1663 char buf[INET6_ADDRSTRLEN];
1664
1665 nbr = (struct zebra_neigh *)bucket->data;
1666 if (!nbr)
1667 return;
1668
1669 zevpn = wctx->zevpn;
1670
1671 if (!CHECK_FLAG(nbr->flags, ZEBRA_NEIGH_DUPLICATE))
1672 return;
1673
1674 if (IS_ZEBRA_DEBUG_VXLAN) {
1675 ipaddr2str(&nbr->ip, buf, sizeof(buf));
1676 zlog_debug("%s: clear neigh %s dup state, flags 0x%x seq %u",
1677 __func__, buf, nbr->flags, nbr->loc_seq);
1678 }
1679
1680 UNSET_FLAG(nbr->flags, ZEBRA_NEIGH_DUPLICATE);
1681 nbr->dad_count = 0;
1682 nbr->detect_start_time.tv_sec = 0;
1683 nbr->detect_start_time.tv_usec = 0;
1684 nbr->dad_dup_detect_time = 0;
1685 THREAD_OFF(nbr->dad_ip_auto_recovery_timer);
1686
1687 if (CHECK_FLAG(nbr->flags, ZEBRA_NEIGH_LOCAL)) {
1688 zebra_evpn_neigh_send_add_to_client(zevpn->vni, &nbr->ip,
1689 &nbr->emac, nbr->mac,
1690 nbr->flags, nbr->loc_seq);
1691 } else if (CHECK_FLAG(nbr->flags, ZEBRA_NEIGH_REMOTE)) {
1692 zebra_evpn_rem_neigh_install(zevpn, nbr, false /*was_static*/);
1693 }
1694 }
1695
1696 /*
1697 * Print a specific neighbor entry.
1698 */
1699 void zebra_evpn_print_neigh(struct zebra_neigh *n, void *ctxt,
1700 json_object *json)
1701 {
1702 struct vty *vty;
1703 char buf1[ETHER_ADDR_STRLEN];
1704 char buf2[INET6_ADDRSTRLEN];
1705 const char *type_str;
1706 const char *state_str;
1707 bool flags_present = false;
1708 struct zebra_vrf *zvrf = NULL;
1709 struct timeval detect_start_time = {0, 0};
1710 char timebuf[MONOTIME_STRLEN];
1711 char thread_buf[THREAD_TIMER_STRLEN];
1712 time_t uptime;
1713 char up_str[MONOTIME_STRLEN];
1714
1715 zvrf = zebra_vrf_get_evpn();
1716 uptime = monotime(NULL);
1717 uptime -= n->uptime;
1718
1719 frrtime_to_interval(uptime, up_str, sizeof(up_str));
1720
1721 ipaddr2str(&n->ip, buf2, sizeof(buf2));
1722 prefix_mac2str(&n->emac, buf1, sizeof(buf1));
1723 type_str = CHECK_FLAG(n->flags, ZEBRA_NEIGH_LOCAL) ? "local" : "remote";
1724 state_str = IS_ZEBRA_NEIGH_ACTIVE(n) ? "active" : "inactive";
1725 vty = (struct vty *)ctxt;
1726 if (json == NULL) {
1727 bool sync_info = false;
1728
1729 vty_out(vty, "IP: %s\n",
1730 ipaddr2str(&n->ip, buf2, sizeof(buf2)));
1731 vty_out(vty, " Type: %s\n", type_str);
1732 vty_out(vty, " State: %s\n", state_str);
1733 vty_out(vty, " Uptime: %s\n", up_str);
1734 vty_out(vty, " MAC: %s\n",
1735 prefix_mac2str(&n->emac, buf1, sizeof(buf1)));
1736 vty_out(vty, " Sync-info:");
1737 if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_LOCAL_INACTIVE)) {
1738 vty_out(vty, " local-inactive");
1739 sync_info = true;
1740 }
1741 if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_ES_PEER_PROXY)) {
1742 vty_out(vty, " peer-proxy");
1743 sync_info = true;
1744 }
1745 if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_ES_PEER_ACTIVE)) {
1746 vty_out(vty, " peer-active");
1747 sync_info = true;
1748 }
1749 if (n->hold_timer) {
1750 vty_out(vty, " (ht: %s)",
1751 thread_timer_to_hhmmss(thread_buf,
1752 sizeof(thread_buf),
1753 n->hold_timer));
1754 sync_info = true;
1755 }
1756 if (!sync_info)
1757 vty_out(vty, " -");
1758 vty_out(vty, "\n");
1759 } else {
1760 json_object_string_add(json, "uptime", up_str);
1761 json_object_string_add(json, "ip", buf2);
1762 json_object_string_add(json, "type", type_str);
1763 json_object_string_add(json, "state", state_str);
1764 json_object_string_add(json, "mac", buf1);
1765 if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_LOCAL_INACTIVE))
1766 json_object_boolean_true_add(json, "localInactive");
1767 if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_ES_PEER_PROXY))
1768 json_object_boolean_true_add(json, "peerProxy");
1769 if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_ES_PEER_ACTIVE))
1770 json_object_boolean_true_add(json, "peerActive");
1771 if (n->hold_timer)
1772 json_object_string_add(
1773 json, "peerActiveHold",
1774 thread_timer_to_hhmmss(thread_buf,
1775 sizeof(thread_buf),
1776 n->hold_timer));
1777 }
1778 if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_REMOTE)) {
1779 if (n->mac->es) {
1780 if (json)
1781 json_object_string_add(json, "remoteEs",
1782 n->mac->es->esi_str);
1783 else
1784 vty_out(vty, " Remote ES: %s\n",
1785 n->mac->es->esi_str);
1786 } else {
1787 if (json)
1788 json_object_string_addf(json, "remoteVtep",
1789 "%pI4", &n->r_vtep_ip);
1790 else
1791 vty_out(vty, " Remote VTEP: %pI4\n",
1792 &n->r_vtep_ip);
1793 }
1794 }
1795 if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_DEF_GW)) {
1796 if (!json) {
1797 vty_out(vty, " Flags: Default-gateway");
1798 flags_present = true;
1799 } else
1800 json_object_boolean_true_add(json, "defaultGateway");
1801 }
1802 if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_ROUTER_FLAG)) {
1803 if (!json) {
1804 vty_out(vty,
1805 flags_present ? " ,Router" : " Flags: Router");
1806 flags_present = true;
1807 }
1808 }
1809 if (json == NULL) {
1810 if (flags_present)
1811 vty_out(vty, "\n");
1812 vty_out(vty, " Local Seq: %u Remote Seq: %u\n", n->loc_seq,
1813 n->rem_seq);
1814
1815 if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_DUPLICATE)) {
1816 vty_out(vty, " Duplicate, detected at %s",
1817 time_to_string(n->dad_dup_detect_time,
1818 timebuf));
1819 } else if (n->dad_count) {
1820 monotime_since(&n->detect_start_time,
1821 &detect_start_time);
1822 if (detect_start_time.tv_sec <= zvrf->dad_time) {
1823 time_to_string(n->detect_start_time.tv_sec,
1824 timebuf);
1825 vty_out(vty,
1826 " Duplicate detection started at %s, detection count %u\n",
1827 timebuf, n->dad_count);
1828 }
1829 }
1830 } else {
1831 json_object_int_add(json, "localSequence", n->loc_seq);
1832 json_object_int_add(json, "remoteSequence", n->rem_seq);
1833 json_object_int_add(json, "detectionCount", n->dad_count);
1834 if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_DUPLICATE))
1835 json_object_boolean_true_add(json, "isDuplicate");
1836 else
1837 json_object_boolean_false_add(json, "isDuplicate");
1838 }
1839 }
1840
1841 void zebra_evpn_print_neigh_hdr(struct vty *vty, struct neigh_walk_ctx *wctx)
1842 {
1843 vty_out(vty, "Flags: I=local-inactive, P=peer-active, X=peer-proxy\n");
1844 vty_out(vty, "%*s %-6s %-5s %-8s %-17s %-30s %s\n", -wctx->addr_width,
1845 "Neighbor", "Type", "Flags", "State", "MAC", "Remote ES/VTEP",
1846 "Seq #'s");
1847 }
1848
1849 static char *zebra_evpn_print_neigh_flags(struct zebra_neigh *n,
1850 char *flags_buf,
1851 uint32_t flags_buf_sz)
1852 {
1853 snprintf(flags_buf, flags_buf_sz, "%s%s%s",
1854 (n->flags & ZEBRA_NEIGH_ES_PEER_ACTIVE) ?
1855 "P" : "",
1856 (n->flags & ZEBRA_NEIGH_ES_PEER_PROXY) ?
1857 "X" : "",
1858 (n->flags & ZEBRA_NEIGH_LOCAL_INACTIVE) ?
1859 "I" : "");
1860
1861 return flags_buf;
1862 }
1863
1864 /*
1865 * Print neighbor hash entry - called for display of all neighbors.
1866 */
1867 void zebra_evpn_print_neigh_hash(struct hash_bucket *bucket, void *ctxt)
1868 {
1869 struct vty *vty;
1870 json_object *json_evpn = NULL, *json_row = NULL;
1871 struct zebra_neigh *n;
1872 char buf1[ETHER_ADDR_STRLEN];
1873 char buf2[INET6_ADDRSTRLEN];
1874 char addr_buf[PREFIX_STRLEN];
1875 struct neigh_walk_ctx *wctx = ctxt;
1876 const char *state_str;
1877 char flags_buf[6];
1878
1879 vty = wctx->vty;
1880 json_evpn = wctx->json;
1881 n = (struct zebra_neigh *)bucket->data;
1882
1883 if (json_evpn)
1884 json_row = json_object_new_object();
1885
1886 prefix_mac2str(&n->emac, buf1, sizeof(buf1));
1887 ipaddr2str(&n->ip, buf2, sizeof(buf2));
1888 state_str = IS_ZEBRA_NEIGH_ACTIVE(n) ? "active" : "inactive";
1889 if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_LOCAL)) {
1890 if (wctx->flags & SHOW_REMOTE_NEIGH_FROM_VTEP)
1891 return;
1892
1893 if (json_evpn == NULL) {
1894 vty_out(vty, "%*s %-6s %-5s %-8s %-17s %-30s %u/%u\n",
1895 -wctx->addr_width, buf2, "local",
1896 zebra_evpn_print_neigh_flags(n, flags_buf,
1897 sizeof(flags_buf)), state_str, buf1,
1898 "", n->loc_seq, n->rem_seq);
1899 } else {
1900 json_object_string_add(json_row, "type", "local");
1901 json_object_string_add(json_row, "state", state_str);
1902 json_object_string_add(json_row, "mac", buf1);
1903 if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_DEF_GW))
1904 json_object_boolean_true_add(json_row,
1905 "defaultGateway");
1906 json_object_int_add(json_row, "localSequence",
1907 n->loc_seq);
1908 json_object_int_add(json_row, "remoteSequence",
1909 n->rem_seq);
1910 json_object_int_add(json_row, "detectionCount",
1911 n->dad_count);
1912 if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_DUPLICATE))
1913 json_object_boolean_true_add(json_row,
1914 "isDuplicate");
1915 else
1916 json_object_boolean_false_add(json_row,
1917 "isDuplicate");
1918 }
1919 wctx->count++;
1920 } else if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_REMOTE)) {
1921 if ((wctx->flags & SHOW_REMOTE_NEIGH_FROM_VTEP)
1922 && !IPV4_ADDR_SAME(&n->r_vtep_ip, &wctx->r_vtep_ip))
1923 return;
1924
1925 if (json_evpn == NULL) {
1926 if ((wctx->flags & SHOW_REMOTE_NEIGH_FROM_VTEP)
1927 && (wctx->count == 0))
1928 zebra_evpn_print_neigh_hdr(vty, wctx);
1929
1930 if (n->mac->es == NULL)
1931 inet_ntop(AF_INET, &n->r_vtep_ip,
1932 addr_buf, sizeof(addr_buf));
1933
1934 vty_out(vty, "%*s %-6s %-5s %-8s %-17s %-30s %u/%u\n",
1935 -wctx->addr_width, buf2, "remote",
1936 zebra_evpn_print_neigh_flags(n, flags_buf,
1937 sizeof(flags_buf)), state_str, buf1,
1938 n->mac->es ? n->mac->es->esi_str : addr_buf,
1939 n->loc_seq, n->rem_seq);
1940 } else {
1941 json_object_string_add(json_row, "type", "remote");
1942 json_object_string_add(json_row, "state", state_str);
1943 json_object_string_add(json_row, "mac", buf1);
1944 if (n->mac->es)
1945 json_object_string_add(json_row, "remoteEs",
1946 n->mac->es->esi_str);
1947 else
1948 json_object_string_addf(json_row, "remoteVtep",
1949 "%pI4", &n->r_vtep_ip);
1950 if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_DEF_GW))
1951 json_object_boolean_true_add(json_row,
1952 "defaultGateway");
1953 json_object_int_add(json_row, "localSequence",
1954 n->loc_seq);
1955 json_object_int_add(json_row, "remoteSequence",
1956 n->rem_seq);
1957 json_object_int_add(json_row, "detectionCount",
1958 n->dad_count);
1959 if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_DUPLICATE))
1960 json_object_boolean_true_add(json_row,
1961 "isDuplicate");
1962 else
1963 json_object_boolean_false_add(json_row,
1964 "isDuplicate");
1965 }
1966 wctx->count++;
1967 }
1968
1969 if (json_evpn)
1970 json_object_object_add(json_evpn, buf2, json_row);
1971 }
1972
1973 /*
1974 * Print neighbor hash entry in detail - called for display of all neighbors.
1975 */
1976 void zebra_evpn_print_neigh_hash_detail(struct hash_bucket *bucket, void *ctxt)
1977 {
1978 struct vty *vty;
1979 json_object *json_evpn = NULL, *json_row = NULL;
1980 struct zebra_neigh *n;
1981 char buf[INET6_ADDRSTRLEN];
1982 struct neigh_walk_ctx *wctx = ctxt;
1983
1984 vty = wctx->vty;
1985 json_evpn = wctx->json;
1986 n = (struct zebra_neigh *)bucket->data;
1987 if (!n)
1988 return;
1989
1990 ipaddr2str(&n->ip, buf, sizeof(buf));
1991 if (json_evpn)
1992 json_row = json_object_new_object();
1993
1994 zebra_evpn_print_neigh(n, vty, json_row);
1995
1996 if (json_evpn)
1997 json_object_object_add(json_evpn, buf, json_row);
1998 }
1999
2000 void zebra_evpn_print_dad_neigh_hash(struct hash_bucket *bucket, void *ctxt)
2001 {
2002 struct zebra_neigh *nbr;
2003
2004 nbr = (struct zebra_neigh *)bucket->data;
2005 if (!nbr)
2006 return;
2007
2008 if (CHECK_FLAG(nbr->flags, ZEBRA_NEIGH_DUPLICATE))
2009 zebra_evpn_print_neigh_hash(bucket, ctxt);
2010 }
2011
2012 void zebra_evpn_print_dad_neigh_hash_detail(struct hash_bucket *bucket,
2013 void *ctxt)
2014 {
2015 struct zebra_neigh *nbr;
2016
2017 nbr = (struct zebra_neigh *)bucket->data;
2018 if (!nbr)
2019 return;
2020
2021 if (CHECK_FLAG(nbr->flags, ZEBRA_NEIGH_DUPLICATE))
2022 zebra_evpn_print_neigh_hash_detail(bucket, ctxt);
2023 }
2024
2025 void zebra_evpn_neigh_remote_macip_add(struct zebra_evpn *zevpn,
2026 struct zebra_vrf *zvrf,
2027 const struct ipaddr *ipaddr,
2028 struct zebra_mac *mac,
2029 struct in_addr vtep_ip, uint8_t flags,
2030 uint32_t seq)
2031 {
2032 struct zebra_neigh *n;
2033 int update_neigh = 0;
2034 struct zebra_mac *old_mac = NULL;
2035 bool old_static = false;
2036 bool do_dad = false;
2037 bool is_dup_detect = false;
2038 bool is_router;
2039
2040 assert(mac);
2041 is_router = !!CHECK_FLAG(flags, ZEBRA_MACIP_TYPE_ROUTER_FLAG);
2042
2043 /* Check if the remote neighbor itself is unknown or has a
2044 * change. If so, create or update and then install the entry.
2045 */
2046 n = zebra_evpn_neigh_lookup(zevpn, ipaddr);
2047 if (!n || !CHECK_FLAG(n->flags, ZEBRA_NEIGH_REMOTE)
2048 || is_router != !!CHECK_FLAG(n->flags, ZEBRA_NEIGH_ROUTER_FLAG)
2049 || (memcmp(&n->emac, &mac->macaddr, sizeof(struct ethaddr)) != 0)
2050 || !IPV4_ADDR_SAME(&n->r_vtep_ip, &vtep_ip) || seq != n->rem_seq)
2051 update_neigh = 1;
2052
2053 if (update_neigh) {
2054 if (!n) {
2055 n = zebra_evpn_neigh_add(zevpn, ipaddr, &mac->macaddr,
2056 mac, 0);
2057 } else {
2058 /* When host moves but changes its (MAC,IP)
2059 * binding, BGP may install a MACIP entry that
2060 * corresponds to "older" location of the host
2061 * in transient situations (because {IP1,M1}
2062 * is a different route from {IP1,M2}). Check
2063 * the sequence number and ignore this update
2064 * if appropriate.
2065 */
2066
2067 if (!zebra_evpn_neigh_is_bgp_seq_ok(
2068 zevpn, n, &mac->macaddr, seq, false))
2069 return;
2070 if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_LOCAL)) {
2071 old_static = zebra_evpn_neigh_is_static(n);
2072 if (IS_ZEBRA_DEBUG_EVPN_MH_NEIGH)
2073 zlog_debug(
2074 "sync->remote neigh vni %u ip %pIA mac %pEA seq %d f0x%x",
2075 n->zevpn->vni, &n->ip, &n->emac,
2076 seq, n->flags);
2077 if (IS_ZEBRA_NEIGH_ACTIVE(n))
2078 zebra_evpn_neigh_send_del_to_client(
2079 zevpn->vni, &n->ip, &n->emac,
2080 n->flags, n->state,
2081 false /*force*/);
2082 zebra_evpn_neigh_clear_sync_info(n);
2083 }
2084 if (memcmp(&n->emac, &mac->macaddr,
2085 sizeof(struct ethaddr))
2086 != 0) {
2087 /* update neigh list for macs */
2088 old_mac =
2089 zebra_evpn_mac_lookup(zevpn, &n->emac);
2090 if (old_mac) {
2091 listnode_delete(old_mac->neigh_list, n);
2092 n->mac = NULL;
2093 zebra_evpn_deref_ip2mac(zevpn, old_mac);
2094 }
2095 n->mac = mac;
2096 listnode_add_sort(mac->neigh_list, n);
2097 memcpy(&n->emac, &mac->macaddr, ETH_ALEN);
2098
2099 /* Check Neigh's curent state is local
2100 * (this is the case where neigh/host has moved
2101 * from L->R) and check previous detction
2102 * started via local learning.
2103 *
2104 * RFC-7432: A PE/VTEP that detects a MAC
2105 * mobilit event via local learning starts
2106 * an M-second timer.
2107 * VTEP-IP or seq. change along is not
2108 * considered for dup. detection.
2109 *
2110 * Mobilty event scenario-B IP-MAC binding
2111 * changed.
2112 */
2113 if ((!CHECK_FLAG(n->flags, ZEBRA_NEIGH_REMOTE))
2114 && n->dad_count)
2115 do_dad = true;
2116 }
2117 }
2118
2119 /* Set "remote" forwarding info. */
2120 UNSET_FLAG(n->flags, ZEBRA_NEIGH_ALL_LOCAL_FLAGS);
2121 n->r_vtep_ip = vtep_ip;
2122 SET_FLAG(n->flags, ZEBRA_NEIGH_REMOTE);
2123
2124 /* Set router flag (R-bit) to this Neighbor entry */
2125 if (CHECK_FLAG(flags, ZEBRA_MACIP_TYPE_ROUTER_FLAG))
2126 SET_FLAG(n->flags, ZEBRA_NEIGH_ROUTER_FLAG);
2127 else
2128 UNSET_FLAG(n->flags, ZEBRA_NEIGH_ROUTER_FLAG);
2129
2130 /* Check old or new MAC detected as duplicate,
2131 * inherit duplicate flag to this neigh.
2132 */
2133 if (zebra_evpn_ip_inherit_dad_from_mac(zvrf, old_mac, mac, n)) {
2134 flog_warn(
2135 EC_ZEBRA_DUP_IP_INHERIT_DETECTED,
2136 "VNI %u: MAC %pEA IP %pIA detected as duplicate during remote update, inherit duplicate from MAC",
2137 zevpn->vni, &mac->macaddr, &n->ip);
2138 }
2139
2140 /* Check duplicate address detection for IP */
2141 zebra_evpn_dup_addr_detect_for_neigh(
2142 zvrf, n, n->r_vtep_ip, do_dad, &is_dup_detect, false);
2143 /* Install the entry. */
2144 if (!is_dup_detect)
2145 zebra_evpn_rem_neigh_install(zevpn, n, old_static);
2146 }
2147
2148 /* Update seq number. */
2149 n->rem_seq = seq;
2150 }
2151
2152 int zebra_evpn_neigh_gw_macip_add(struct interface *ifp,
2153 struct zebra_evpn *zevpn, struct ipaddr *ip,
2154 struct zebra_mac *mac)
2155 {
2156 struct zebra_neigh *n;
2157
2158 assert(mac);
2159
2160 n = zebra_evpn_neigh_lookup(zevpn, ip);
2161 if (!n)
2162 n = zebra_evpn_neigh_add(zevpn, ip, &mac->macaddr, mac, 0);
2163
2164 /* Set "local" forwarding info. */
2165 SET_FLAG(n->flags, ZEBRA_NEIGH_LOCAL);
2166 ZEBRA_NEIGH_SET_ACTIVE(n);
2167 memcpy(&n->emac, &mac->macaddr, ETH_ALEN);
2168 n->ifindex = ifp->ifindex;
2169
2170 /* Only advertise in BGP if the knob is enabled */
2171 if (advertise_gw_macip_enabled(zevpn)) {
2172
2173 SET_FLAG(n->flags, ZEBRA_NEIGH_DEF_GW);
2174 /* Set Router flag (R-bit) */
2175 if (ip->ipa_type == IPADDR_V6)
2176 SET_FLAG(n->flags, ZEBRA_NEIGH_ROUTER_FLAG);
2177
2178 if (IS_ZEBRA_DEBUG_VXLAN)
2179 zlog_debug(
2180 "SVI %s(%u) L2-VNI %u, sending GW MAC %pEA IP %pIA add to BGP with flags 0x%x",
2181 ifp->name, ifp->ifindex, zevpn->vni,
2182 &mac->macaddr, ip, n->flags);
2183
2184 zebra_evpn_neigh_send_add_to_client(
2185 zevpn->vni, ip, &n->emac, n->mac, n->flags, n->loc_seq);
2186 } else if (advertise_svi_macip_enabled(zevpn)) {
2187
2188 SET_FLAG(n->flags, ZEBRA_NEIGH_SVI_IP);
2189 if (IS_ZEBRA_DEBUG_VXLAN)
2190 zlog_debug(
2191 "SVI %s(%u) L2-VNI %u, sending SVI MAC %pEA IP %pIA add to BGP with flags 0x%x",
2192 ifp->name, ifp->ifindex, zevpn->vni,
2193 &mac->macaddr, ip, n->flags);
2194
2195 zebra_evpn_neigh_send_add_to_client(
2196 zevpn->vni, ip, &n->emac, n->mac, n->flags, n->loc_seq);
2197 }
2198
2199 return 0;
2200 }
2201
2202 void zebra_evpn_neigh_remote_uninstall(struct zebra_evpn *zevpn,
2203 struct zebra_vrf *zvrf,
2204 struct zebra_neigh *n,
2205 struct zebra_mac *mac,
2206 const struct ipaddr *ipaddr)
2207 {
2208 if (zvrf->dad_freeze && CHECK_FLAG(n->flags, ZEBRA_NEIGH_DUPLICATE)
2209 && CHECK_FLAG(n->flags, ZEBRA_NEIGH_REMOTE)
2210 && (memcmp(n->emac.octet, mac->macaddr.octet, ETH_ALEN) == 0)) {
2211 struct interface *vlan_if;
2212
2213 vlan_if = zevpn_map_to_svi(zevpn);
2214 if (IS_ZEBRA_DEBUG_VXLAN)
2215 zlog_debug(
2216 "%s: IP %pIA (flags 0x%x intf %s) is remote and duplicate, read kernel for local entry",
2217 __func__, ipaddr, n->flags,
2218 vlan_if ? vlan_if->name : "Unknown");
2219 if (vlan_if)
2220 neigh_read_specific_ip(ipaddr, vlan_if);
2221 }
2222
2223 /* When the MAC changes for an IP, it is possible the
2224 * client may update the new MAC before trying to delete the
2225 * "old" neighbor (as these are two different MACIP routes).
2226 * Do the delete only if the MAC matches.
2227 */
2228 if (!memcmp(n->emac.octet, mac->macaddr.octet, ETH_ALEN)) {
2229 if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_LOCAL)) {
2230 zebra_evpn_sync_neigh_del(n);
2231 } else if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_REMOTE)) {
2232 zebra_evpn_neigh_uninstall(zevpn, n);
2233 zebra_evpn_neigh_del(zevpn, n);
2234 zebra_evpn_deref_ip2mac(zevpn, mac);
2235 }
2236 }
2237 }
2238
2239 int zebra_evpn_neigh_del_ip(struct zebra_evpn *zevpn, const struct ipaddr *ip)
2240 {
2241 struct zebra_neigh *n;
2242 struct zebra_mac *zmac;
2243 bool old_bgp_ready;
2244 bool new_bgp_ready;
2245 struct zebra_vrf *zvrf;
2246
2247 /* If entry doesn't exist, nothing to do. */
2248 n = zebra_evpn_neigh_lookup(zevpn, ip);
2249 if (!n)
2250 return 0;
2251
2252 zmac = zebra_evpn_mac_lookup(zevpn, &n->emac);
2253 if (!zmac) {
2254 if (IS_ZEBRA_DEBUG_VXLAN)
2255 zlog_debug(
2256 "Trying to del a neigh %pIA without a mac %pEA on VNI %u",
2257 ip, &n->emac,
2258 zevpn->vni);
2259
2260 return 0;
2261 }
2262
2263 /* If it is a remote entry, the kernel has aged this out or someone has
2264 * deleted it, it needs to be re-installed as FRR is the owner.
2265 */
2266 if (CHECK_FLAG(n->flags, ZEBRA_NEIGH_REMOTE)) {
2267 zebra_evpn_rem_neigh_install(zevpn, n, false /*was_static*/);
2268 return 0;
2269 }
2270
2271 /* if this is a sync entry it cannot be dropped re-install it in
2272 * the dataplane
2273 */
2274 old_bgp_ready = zebra_evpn_neigh_is_ready_for_bgp(n);
2275 if (zebra_evpn_neigh_is_static(n)) {
2276 if (IS_ZEBRA_DEBUG_EVPN_MH_NEIGH)
2277 zlog_debug("re-add sync neigh vni %u ip %pIA mac %pEA 0x%x",
2278 n->zevpn->vni, &n->ip, &n->emac,
2279 n->flags);
2280
2281 if (!CHECK_FLAG(n->flags, ZEBRA_NEIGH_LOCAL_INACTIVE))
2282 SET_FLAG(n->flags, ZEBRA_NEIGH_LOCAL_INACTIVE);
2283 /* inform-bgp about change in local-activity if any */
2284 new_bgp_ready = zebra_evpn_neigh_is_ready_for_bgp(n);
2285 zebra_evpn_neigh_send_add_del_to_client(n, old_bgp_ready,
2286 new_bgp_ready);
2287
2288 /* re-install the entry in the kernel */
2289 zebra_evpn_sync_neigh_dp_install(n, false /* set_inactive */,
2290 false /* force_clear_static */,
2291 __func__);
2292
2293 return 0;
2294 }
2295
2296 zvrf = zevpn->vxlan_if->vrf->info;
2297 if (!zvrf) {
2298 zlog_debug("%s: VNI %u vrf lookup failed.", __func__,
2299 zevpn->vni);
2300 return -1;
2301 }
2302
2303 /* In case of feeze action, if local neigh is in duplicate state,
2304 * Mark the Neigh as inactive before sending delete request to BGPd,
2305 * If BGPd has remote entry, it will re-install
2306 */
2307 if (zvrf->dad_freeze && CHECK_FLAG(n->flags, ZEBRA_NEIGH_DUPLICATE))
2308 ZEBRA_NEIGH_SET_INACTIVE(n);
2309
2310 /* Remove neighbor from BGP. */
2311 zebra_evpn_neigh_send_del_to_client(zevpn->vni, &n->ip, &n->emac,
2312 n->flags, n->state,
2313 false /* force */);
2314
2315 /* Delete this neighbor entry. */
2316 zebra_evpn_neigh_del(zevpn, n);
2317
2318 /* see if the AUTO mac needs to be deleted */
2319 if (CHECK_FLAG(zmac->flags, ZEBRA_MAC_AUTO)
2320 && !zebra_evpn_mac_in_use(zmac))
2321 zebra_evpn_mac_del(zevpn, zmac);
2322
2323 return 0;
2324 }
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