2 * bgp_updgrp.c: BGP update group structures
4 * @copyright Copyright (C) 2014 Cumulus Networks, Inc.
6 * @author Avneesh Sachdev <avneesh@sproute.net>
7 * @author Rajesh Varadarajan <rajesh@sproute.net>
8 * @author Pradosh Mohapatra <pradosh@sproute.net>
10 * This file is part of GNU Zebra.
12 * GNU Zebra is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2, or (at your option) any
17 * GNU Zebra is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
22 * You should have received a copy of the GNU General Public License along
23 * with this program; see the file COPYING; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
34 #include "sockunion.h"
42 #include "workqueue.h"
47 #include "bgpd/bgpd.h"
48 #include "bgpd/bgp_table.h"
49 #include "bgpd/bgp_debug.h"
50 #include "bgpd/bgp_errors.h"
51 #include "bgpd/bgp_fsm.h"
52 #include "bgpd/bgp_advertise.h"
53 #include "bgpd/bgp_packet.h"
54 #include "bgpd/bgp_updgrp.h"
55 #include "bgpd/bgp_route.h"
56 #include "bgpd/bgp_filter.h"
57 #include "bgpd/bgp_io.h"
64 * assign a unique ID to update group and subgroup. Mostly for display/
65 * debugging purposes. It's a 64-bit space - used leisurely without a
66 * worry about its wrapping and about filling gaps. While at it, timestamp
69 static void update_group_checkin(struct update_group
*updgrp
)
71 updgrp
->id
= ++bm
->updgrp_idspace
;
72 updgrp
->uptime
= bgp_clock();
75 static void update_subgroup_checkin(struct update_subgroup
*subgrp
,
76 struct update_group
*updgrp
)
78 subgrp
->id
= ++bm
->subgrp_idspace
;
79 subgrp
->uptime
= bgp_clock();
82 static void sync_init(struct update_subgroup
*subgrp
)
85 XCALLOC(MTYPE_BGP_SYNCHRONISE
, sizeof(struct bgp_synchronize
));
86 BGP_ADV_FIFO_INIT(&subgrp
->sync
->update
);
87 BGP_ADV_FIFO_INIT(&subgrp
->sync
->withdraw
);
88 BGP_ADV_FIFO_INIT(&subgrp
->sync
->withdraw_low
);
90 hash_create(baa_hash_key
, baa_hash_cmp
, "BGP SubGroup Hash");
92 /* We use a larger buffer for subgrp->work in the event that:
93 * - We RX a BGP_UPDATE where the attributes alone are just
94 * under BGP_MAX_PACKET_SIZE
95 * - The user configures an outbound route-map that does many as-path
96 * prepends or adds many communities. At most they can have
98 * args in a route-map so there is a finite limit on how large they
100 * make the attributes.
102 * Having a buffer with BGP_MAX_PACKET_SIZE_OVERFLOW allows us to avoid
104 * checking for every single attribute as we construct an UPDATE.
107 stream_new(BGP_MAX_PACKET_SIZE
+ BGP_MAX_PACKET_SIZE_OVERFLOW
);
108 subgrp
->scratch
= stream_new(BGP_MAX_PACKET_SIZE
);
111 static void sync_delete(struct update_subgroup
*subgrp
)
114 XFREE(MTYPE_BGP_SYNCHRONISE
, subgrp
->sync
);
117 hash_free(subgrp
->hash
);
120 stream_free(subgrp
->work
);
123 stream_free(subgrp
->scratch
);
124 subgrp
->scratch
= NULL
;
130 * copy only those fields that are relevant to update group match
132 static void conf_copy(struct peer
*dst
, struct peer
*src
, afi_t afi
,
135 struct bgp_filter
*srcfilter
;
136 struct bgp_filter
*dstfilter
;
138 srcfilter
= &src
->filter
[afi
][safi
];
139 dstfilter
= &dst
->filter
[afi
][safi
];
142 dst
->sort
= src
->sort
;
144 dst
->v_routeadv
= src
->v_routeadv
;
145 dst
->flags
= src
->flags
;
146 dst
->af_flags
[afi
][safi
] = src
->af_flags
[afi
][safi
];
148 XFREE(MTYPE_BGP_PEER_HOST
, dst
->host
);
150 dst
->host
= XSTRDUP(MTYPE_BGP_PEER_HOST
, src
->host
);
152 dst
->af_cap
[afi
][safi
] = src
->af_cap
[afi
][safi
];
153 dst
->afc_nego
[afi
][safi
] = src
->afc_nego
[afi
][safi
];
154 dst
->orf_plist
[afi
][safi
] = src
->orf_plist
[afi
][safi
];
155 dst
->addpath_type
[afi
][safi
] = src
->addpath_type
[afi
][safi
];
156 dst
->local_as
= src
->local_as
;
157 dst
->change_local_as
= src
->change_local_as
;
158 dst
->shared_network
= src
->shared_network
;
159 memcpy(&(dst
->nexthop
), &(src
->nexthop
), sizeof(struct bgp_nexthop
));
161 dst
->group
= src
->group
;
163 if (src
->default_rmap
[afi
][safi
].name
) {
164 dst
->default_rmap
[afi
][safi
].name
=
165 XSTRDUP(MTYPE_ROUTE_MAP_NAME
,
166 src
->default_rmap
[afi
][safi
].name
);
167 dst
->default_rmap
[afi
][safi
].map
=
168 src
->default_rmap
[afi
][safi
].map
;
171 if (DISTRIBUTE_OUT_NAME(srcfilter
)) {
172 DISTRIBUTE_OUT_NAME(dstfilter
) = XSTRDUP(
173 MTYPE_BGP_FILTER_NAME
, DISTRIBUTE_OUT_NAME(srcfilter
));
174 DISTRIBUTE_OUT(dstfilter
) = DISTRIBUTE_OUT(srcfilter
);
177 if (PREFIX_LIST_OUT_NAME(srcfilter
)) {
178 PREFIX_LIST_OUT_NAME(dstfilter
) = XSTRDUP(
179 MTYPE_BGP_FILTER_NAME
, PREFIX_LIST_OUT_NAME(srcfilter
));
180 PREFIX_LIST_OUT(dstfilter
) = PREFIX_LIST_OUT(srcfilter
);
183 if (FILTER_LIST_OUT_NAME(srcfilter
)) {
184 FILTER_LIST_OUT_NAME(dstfilter
) = XSTRDUP(
185 MTYPE_BGP_FILTER_NAME
, FILTER_LIST_OUT_NAME(srcfilter
));
186 FILTER_LIST_OUT(dstfilter
) = FILTER_LIST_OUT(srcfilter
);
189 if (ROUTE_MAP_OUT_NAME(srcfilter
)) {
190 ROUTE_MAP_OUT_NAME(dstfilter
) = XSTRDUP(
191 MTYPE_BGP_FILTER_NAME
, ROUTE_MAP_OUT_NAME(srcfilter
));
192 ROUTE_MAP_OUT(dstfilter
) = ROUTE_MAP_OUT(srcfilter
);
195 if (UNSUPPRESS_MAP_NAME(srcfilter
)) {
196 UNSUPPRESS_MAP_NAME(dstfilter
) = XSTRDUP(
197 MTYPE_BGP_FILTER_NAME
, UNSUPPRESS_MAP_NAME(srcfilter
));
198 UNSUPPRESS_MAP(dstfilter
) = UNSUPPRESS_MAP(srcfilter
);
203 * since we did a bunch of XSTRDUP's in conf_copy, time to free them up
205 static void conf_release(struct peer
*src
, afi_t afi
, safi_t safi
)
207 struct bgp_filter
*srcfilter
;
209 srcfilter
= &src
->filter
[afi
][safi
];
211 if (src
->default_rmap
[afi
][safi
].name
)
212 XFREE(MTYPE_ROUTE_MAP_NAME
, src
->default_rmap
[afi
][safi
].name
);
214 if (srcfilter
->dlist
[FILTER_OUT
].name
)
215 XFREE(MTYPE_BGP_FILTER_NAME
, srcfilter
->dlist
[FILTER_OUT
].name
);
217 if (srcfilter
->plist
[FILTER_OUT
].name
)
218 XFREE(MTYPE_BGP_FILTER_NAME
, srcfilter
->plist
[FILTER_OUT
].name
);
220 if (srcfilter
->aslist
[FILTER_OUT
].name
)
221 XFREE(MTYPE_BGP_FILTER_NAME
,
222 srcfilter
->aslist
[FILTER_OUT
].name
);
224 if (srcfilter
->map
[RMAP_OUT
].name
)
225 XFREE(MTYPE_BGP_FILTER_NAME
, srcfilter
->map
[RMAP_OUT
].name
);
227 if (srcfilter
->usmap
.name
)
228 XFREE(MTYPE_BGP_FILTER_NAME
, srcfilter
->usmap
.name
);
231 XFREE(MTYPE_BGP_PEER_HOST
, src
->host
);
235 static void peer2_updgrp_copy(struct update_group
*updgrp
, struct peer_af
*paf
)
248 updgrp
->afi
= paf
->afi
;
249 updgrp
->safi
= paf
->safi
;
250 updgrp
->afid
= paf
->afid
;
251 updgrp
->bgp
= src
->bgp
;
253 conf_copy(dst
, src
, paf
->afi
, paf
->safi
);
257 * auxiliary functions to maintain the hash table.
258 * - updgrp_hash_alloc - to create a new entry, passed to hash_get
259 * - updgrp_hash_key_make - makes the key for update group search
260 * - updgrp_hash_cmp - compare two update groups.
262 static void *updgrp_hash_alloc(void *p
)
264 struct update_group
*updgrp
;
265 const struct update_group
*in
;
267 in
= (const struct update_group
*)p
;
268 updgrp
= XCALLOC(MTYPE_BGP_UPDGRP
, sizeof(struct update_group
));
269 memcpy(updgrp
, in
, sizeof(struct update_group
));
270 updgrp
->conf
= XCALLOC(MTYPE_BGP_PEER
, sizeof(struct peer
));
271 conf_copy(updgrp
->conf
, in
->conf
, in
->afi
, in
->safi
);
276 * The hash value for a peer is computed from the following variables:
278 * 1. IBGP (1) or EBGP (2)
279 * 2. FLAGS based on configuration:
280 * LOCAL_AS_NO_PREPEND
281 * LOCAL_AS_REPLACE_AS
282 * 3. AF_FLAGS based on configuration:
283 * Refer to definition in bgp_updgrp.h
284 * 4. (AF-independent) Capability flags:
286 * 5. (AF-dependent) Capability flags:
287 * ORF_PREFIX_SM_RCV (peer can send prefix ORF)
290 * 8. Outbound route-map name (neighbor route-map <> out)
291 * 9. Outbound distribute-list name (neighbor distribute-list <> out)
292 * 10. Outbound prefix-list name (neighbor prefix-list <> out)
293 * 11. Outbound as-list name (neighbor filter-list <> out)
294 * 12. Unsuppress map name (neighbor unsuppress-map <>)
295 * 13. default rmap name (neighbor default-originate route-map <>)
296 * 14. encoding both global and link-local nexthop?
297 * 15. If peer is configured to be a lonesoul, peer ip address
298 * 16. Local-as should match, if configured.
301 static unsigned int updgrp_hash_key_make(void *p
)
303 const struct update_group
*updgrp
;
304 const struct peer
*peer
;
305 const struct bgp_filter
*filter
;
312 #define SEED2 2147483647
318 flags
= peer
->af_flags
[afi
][safi
];
319 filter
= &peer
->filter
[afi
][safi
];
323 key
= jhash_1word(peer
->sort
, key
); /* EBGP or IBGP */
324 key
= jhash_1word((peer
->flags
& PEER_UPDGRP_FLAGS
), key
);
325 key
= jhash_1word((flags
& PEER_UPDGRP_AF_FLAGS
), key
);
326 key
= jhash_1word((uint32_t)peer
->addpath_type
[afi
][safi
], key
);
327 key
= jhash_1word((peer
->cap
& PEER_UPDGRP_CAP_FLAGS
), key
);
328 key
= jhash_1word((peer
->af_cap
[afi
][safi
] & PEER_UPDGRP_AF_CAP_FLAGS
),
330 key
= jhash_1word(peer
->v_routeadv
, key
);
331 key
= jhash_1word(peer
->change_local_as
, key
);
334 key
= jhash_1word(jhash(peer
->group
->name
,
335 strlen(peer
->group
->name
), SEED1
),
338 if (filter
->map
[RMAP_OUT
].name
)
339 key
= jhash_1word(jhash(filter
->map
[RMAP_OUT
].name
,
340 strlen(filter
->map
[RMAP_OUT
].name
),
344 if (filter
->dlist
[FILTER_OUT
].name
)
345 key
= jhash_1word(jhash(filter
->dlist
[FILTER_OUT
].name
,
346 strlen(filter
->dlist
[FILTER_OUT
].name
),
350 if (filter
->plist
[FILTER_OUT
].name
)
351 key
= jhash_1word(jhash(filter
->plist
[FILTER_OUT
].name
,
352 strlen(filter
->plist
[FILTER_OUT
].name
),
356 if (filter
->aslist
[FILTER_OUT
].name
)
357 key
= jhash_1word(jhash(filter
->aslist
[FILTER_OUT
].name
,
358 strlen(filter
->aslist
[FILTER_OUT
].name
),
362 if (filter
->usmap
.name
)
363 key
= jhash_1word(jhash(filter
->usmap
.name
,
364 strlen(filter
->usmap
.name
), SEED1
),
367 if (peer
->default_rmap
[afi
][safi
].name
)
369 jhash(peer
->default_rmap
[afi
][safi
].name
,
370 strlen(peer
->default_rmap
[afi
][safi
].name
),
374 /* If peer is on a shared network and is exchanging IPv6 prefixes,
375 * it needs to include link-local address. That's different from
376 * non-shared-network peers (nexthop encoded with 32 bytes vs 16
377 * bytes). We create different update groups to take care of that.
380 (peer
->shared_network
&& peer_afi_active_nego(peer
, AFI_IP6
)),
384 * There are certain peers that must get their own update-group:
386 * - peers that negotiated ORF
388 if (CHECK_FLAG(peer
->flags
, PEER_FLAG_LONESOUL
)
389 || CHECK_FLAG(peer
->af_cap
[afi
][safi
], PEER_CAP_ORF_PREFIX_SM_RCV
)
390 || CHECK_FLAG(peer
->af_cap
[afi
][safi
],
391 PEER_CAP_ORF_PREFIX_SM_OLD_RCV
))
392 key
= jhash_1word(jhash(peer
->host
, strlen(peer
->host
), SEED2
),
398 static bool updgrp_hash_cmp(const void *p1
, const void *p2
)
400 const struct update_group
*grp1
;
401 const struct update_group
*grp2
;
402 const struct peer
*pe1
;
403 const struct peer
*pe2
;
406 const struct bgp_filter
*fl1
;
407 const struct bgp_filter
*fl2
;
420 flags1
= pe1
->af_flags
[afi
][safi
];
421 flags2
= pe2
->af_flags
[afi
][safi
];
422 fl1
= &pe1
->filter
[afi
][safi
];
423 fl2
= &pe2
->filter
[afi
][safi
];
425 /* put EBGP and IBGP peers in different update groups */
426 if (pe1
->sort
!= pe2
->sort
)
429 /* check peer flags */
430 if ((pe1
->flags
& PEER_UPDGRP_FLAGS
)
431 != (pe2
->flags
& PEER_UPDGRP_FLAGS
))
434 /* If there is 'local-as' configured, it should match. */
435 if (pe1
->change_local_as
!= pe2
->change_local_as
)
438 /* flags like route reflector client */
439 if ((flags1
& PEER_UPDGRP_AF_FLAGS
) != (flags2
& PEER_UPDGRP_AF_FLAGS
))
442 if (pe1
->addpath_type
[afi
][safi
] != pe2
->addpath_type
[afi
][safi
])
445 if ((pe1
->cap
& PEER_UPDGRP_CAP_FLAGS
)
446 != (pe2
->cap
& PEER_UPDGRP_CAP_FLAGS
))
449 if ((pe1
->af_cap
[afi
][safi
] & PEER_UPDGRP_AF_CAP_FLAGS
)
450 != (pe2
->af_cap
[afi
][safi
] & PEER_UPDGRP_AF_CAP_FLAGS
))
453 if (pe1
->v_routeadv
!= pe2
->v_routeadv
)
456 if (pe1
->group
!= pe2
->group
)
459 /* route-map names should be the same */
460 if ((fl1
->map
[RMAP_OUT
].name
&& !fl2
->map
[RMAP_OUT
].name
)
461 || (!fl1
->map
[RMAP_OUT
].name
&& fl2
->map
[RMAP_OUT
].name
)
462 || (fl1
->map
[RMAP_OUT
].name
&& fl2
->map
[RMAP_OUT
].name
463 && strcmp(fl1
->map
[RMAP_OUT
].name
, fl2
->map
[RMAP_OUT
].name
)))
466 if ((fl1
->dlist
[FILTER_OUT
].name
&& !fl2
->dlist
[FILTER_OUT
].name
)
467 || (!fl1
->dlist
[FILTER_OUT
].name
&& fl2
->dlist
[FILTER_OUT
].name
)
468 || (fl1
->dlist
[FILTER_OUT
].name
&& fl2
->dlist
[FILTER_OUT
].name
469 && strcmp(fl1
->dlist
[FILTER_OUT
].name
,
470 fl2
->dlist
[FILTER_OUT
].name
)))
473 if ((fl1
->plist
[FILTER_OUT
].name
&& !fl2
->plist
[FILTER_OUT
].name
)
474 || (!fl1
->plist
[FILTER_OUT
].name
&& fl2
->plist
[FILTER_OUT
].name
)
475 || (fl1
->plist
[FILTER_OUT
].name
&& fl2
->plist
[FILTER_OUT
].name
476 && strcmp(fl1
->plist
[FILTER_OUT
].name
,
477 fl2
->plist
[FILTER_OUT
].name
)))
480 if ((fl1
->aslist
[FILTER_OUT
].name
&& !fl2
->aslist
[FILTER_OUT
].name
)
481 || (!fl1
->aslist
[FILTER_OUT
].name
&& fl2
->aslist
[FILTER_OUT
].name
)
482 || (fl1
->aslist
[FILTER_OUT
].name
&& fl2
->aslist
[FILTER_OUT
].name
483 && strcmp(fl1
->aslist
[FILTER_OUT
].name
,
484 fl2
->aslist
[FILTER_OUT
].name
)))
487 if ((fl1
->usmap
.name
&& !fl2
->usmap
.name
)
488 || (!fl1
->usmap
.name
&& fl2
->usmap
.name
)
489 || (fl1
->usmap
.name
&& fl2
->usmap
.name
490 && strcmp(fl1
->usmap
.name
, fl2
->usmap
.name
)))
493 if ((pe1
->default_rmap
[afi
][safi
].name
494 && !pe2
->default_rmap
[afi
][safi
].name
)
495 || (!pe1
->default_rmap
[afi
][safi
].name
496 && pe2
->default_rmap
[afi
][safi
].name
)
497 || (pe1
->default_rmap
[afi
][safi
].name
498 && pe2
->default_rmap
[afi
][safi
].name
499 && strcmp(pe1
->default_rmap
[afi
][safi
].name
,
500 pe2
->default_rmap
[afi
][safi
].name
)))
503 if ((afi
== AFI_IP6
) && (pe1
->shared_network
!= pe2
->shared_network
))
506 if ((CHECK_FLAG(pe1
->flags
, PEER_FLAG_LONESOUL
)
507 || CHECK_FLAG(pe1
->af_cap
[afi
][safi
], PEER_CAP_ORF_PREFIX_SM_RCV
)
508 || CHECK_FLAG(pe1
->af_cap
[afi
][safi
],
509 PEER_CAP_ORF_PREFIX_SM_OLD_RCV
))
510 && !sockunion_same(&pe1
->su
, &pe2
->su
))
516 static void peer_lonesoul_or_not(struct peer
*peer
, int set
)
518 /* no change in status? */
519 if (set
== (CHECK_FLAG(peer
->flags
, PEER_FLAG_LONESOUL
) > 0))
523 SET_FLAG(peer
->flags
, PEER_FLAG_LONESOUL
);
525 UNSET_FLAG(peer
->flags
, PEER_FLAG_LONESOUL
);
527 update_group_adjust_peer_afs(peer
);
531 * subgroup_total_packets_enqueued
533 * Returns the total number of packets enqueued to a subgroup.
536 subgroup_total_packets_enqueued(struct update_subgroup
*subgrp
)
540 pkt
= bpacket_queue_last(SUBGRP_PKTQ(subgrp
));
545 static int update_group_show_walkcb(struct update_group
*updgrp
, void *arg
)
547 struct updwalk_context
*ctx
= arg
;
549 struct update_subgroup
*subgrp
;
551 struct bgp_filter
*filter
;
557 if (ctx
->subgrp_id
) {
558 UPDGRP_FOREACH_SUBGRP (updgrp
, subgrp
) {
559 if (ctx
->subgrp_id
&& (ctx
->subgrp_id
!= subgrp
->id
))
571 /* Since this routine is invoked from a walk, we cannot signal
573 /* error here, can only return. */
579 vty_out(vty
, "Update-group %" PRIu64
":\n", updgrp
->id
);
580 vty_out(vty
, " Created: %s", timestamp_string(updgrp
->uptime
));
581 filter
= &updgrp
->conf
->filter
[updgrp
->afi
][updgrp
->safi
];
582 if (filter
->map
[RMAP_OUT
].name
)
583 vty_out(vty
, " Outgoing route map: %s%s\n",
584 filter
->map
[RMAP_OUT
].map
? "X" : "",
585 filter
->map
[RMAP_OUT
].name
);
586 vty_out(vty
, " MRAI value (seconds): %d\n", updgrp
->conf
->v_routeadv
);
587 if (updgrp
->conf
->change_local_as
)
588 vty_out(vty
, " Local AS %u%s%s\n",
589 updgrp
->conf
->change_local_as
,
590 CHECK_FLAG(updgrp
->conf
->flags
,
591 PEER_FLAG_LOCAL_AS_NO_PREPEND
)
594 CHECK_FLAG(updgrp
->conf
->flags
,
595 PEER_FLAG_LOCAL_AS_REPLACE_AS
)
599 UPDGRP_FOREACH_SUBGRP (updgrp
, subgrp
) {
600 if (ctx
->subgrp_id
&& (ctx
->subgrp_id
!= subgrp
->id
))
603 vty_out(vty
, " Update-subgroup %" PRIu64
":\n", subgrp
->id
);
604 vty_out(vty
, " Created: %s",
605 timestamp_string(subgrp
->uptime
));
607 if (subgrp
->split_from
.update_group_id
608 || subgrp
->split_from
.subgroup_id
) {
609 vty_out(vty
, " Split from group id: %" PRIu64
"\n",
610 subgrp
->split_from
.update_group_id
);
612 " Split from subgroup id: %" PRIu64
"\n",
613 subgrp
->split_from
.subgroup_id
);
616 vty_out(vty
, " Join events: %u\n", subgrp
->join_events
);
617 vty_out(vty
, " Prune events: %u\n", subgrp
->prune_events
);
618 vty_out(vty
, " Merge events: %u\n", subgrp
->merge_events
);
619 vty_out(vty
, " Split events: %u\n", subgrp
->split_events
);
620 vty_out(vty
, " Update group switch events: %u\n",
621 subgrp
->updgrp_switch_events
);
622 vty_out(vty
, " Peer refreshes combined: %u\n",
623 subgrp
->peer_refreshes_combined
);
624 vty_out(vty
, " Merge checks triggered: %u\n",
625 subgrp
->merge_checks_triggered
);
626 vty_out(vty
, " Version: %" PRIu64
"\n", subgrp
->version
);
627 vty_out(vty
, " Packet queue length: %d\n",
628 bpacket_queue_length(SUBGRP_PKTQ(subgrp
)));
629 vty_out(vty
, " Total packets enqueued: %u\n",
630 subgroup_total_packets_enqueued(subgrp
));
631 vty_out(vty
, " Packet queue high watermark: %d\n",
632 bpacket_queue_hwm_length(SUBGRP_PKTQ(subgrp
)));
633 vty_out(vty
, " Adj-out list count: %u\n", subgrp
->adj_count
);
634 vty_out(vty
, " Advertise list: %s\n",
635 advertise_list_is_empty(subgrp
) ? "empty"
637 vty_out(vty
, " Flags: %s\n",
638 CHECK_FLAG(subgrp
->flags
, SUBGRP_FLAG_NEEDS_REFRESH
)
641 if (subgrp
->peer_count
> 0) {
642 vty_out(vty
, " Peers:\n");
643 SUBGRP_FOREACH_PEER (subgrp
, paf
)
644 vty_out(vty
, " - %s\n", paf
->peer
->host
);
647 return UPDWALK_CONTINUE
;
651 * Helper function to show the packet queue for each subgroup of update group.
652 * Will be constrained to a particular subgroup id if id !=0
654 static int updgrp_show_packet_queue_walkcb(struct update_group
*updgrp
,
657 struct updwalk_context
*ctx
= arg
;
658 struct update_subgroup
*subgrp
;
662 UPDGRP_FOREACH_SUBGRP (updgrp
, subgrp
) {
663 if (ctx
->subgrp_id
&& (ctx
->subgrp_id
!= subgrp
->id
))
665 vty_out(vty
, "update group %" PRIu64
", subgroup %" PRIu64
"\n",
666 updgrp
->id
, subgrp
->id
);
667 bpacket_queue_show_vty(SUBGRP_PKTQ(subgrp
), vty
);
669 return UPDWALK_CONTINUE
;
673 * Show the packet queue for each subgroup of update group. Will be
674 * constrained to a particular subgroup id if id !=0
676 void update_group_show_packet_queue(struct bgp
*bgp
, afi_t afi
, safi_t safi
,
677 struct vty
*vty
, uint64_t id
)
679 struct updwalk_context ctx
;
681 memset(&ctx
, 0, sizeof(ctx
));
685 update_group_af_walk(bgp
, afi
, safi
, updgrp_show_packet_queue_walkcb
,
689 static struct update_group
*update_group_find(struct peer_af
*paf
)
691 struct update_group
*updgrp
;
692 struct update_group tmp
;
693 struct peer tmp_conf
;
695 if (!peer_established(PAF_PEER(paf
)))
698 memset(&tmp
, 0, sizeof(tmp
));
699 memset(&tmp_conf
, 0, sizeof(tmp_conf
));
700 tmp
.conf
= &tmp_conf
;
701 peer2_updgrp_copy(&tmp
, paf
);
703 updgrp
= hash_lookup(paf
->peer
->bgp
->update_groups
[paf
->afid
], &tmp
);
704 conf_release(&tmp_conf
, paf
->afi
, paf
->safi
);
708 static struct update_group
*update_group_create(struct peer_af
*paf
)
710 struct update_group
*updgrp
;
711 struct update_group tmp
;
712 struct peer tmp_conf
;
714 memset(&tmp
, 0, sizeof(tmp
));
715 memset(&tmp_conf
, 0, sizeof(tmp_conf
));
716 tmp
.conf
= &tmp_conf
;
717 peer2_updgrp_copy(&tmp
, paf
);
719 updgrp
= hash_get(paf
->peer
->bgp
->update_groups
[paf
->afid
], &tmp
,
723 update_group_checkin(updgrp
);
725 if (BGP_DEBUG(update_groups
, UPDATE_GROUPS
))
726 zlog_debug("create update group %" PRIu64
, updgrp
->id
);
728 UPDGRP_GLOBAL_STAT(updgrp
, updgrps_created
) += 1;
730 conf_release(&tmp_conf
, paf
->afi
, paf
->safi
);
734 static void update_group_delete(struct update_group
*updgrp
)
736 if (BGP_DEBUG(update_groups
, UPDATE_GROUPS
))
737 zlog_debug("delete update group %" PRIu64
, updgrp
->id
);
739 UPDGRP_GLOBAL_STAT(updgrp
, updgrps_deleted
) += 1;
741 hash_release(updgrp
->bgp
->update_groups
[updgrp
->afid
], updgrp
);
742 conf_release(updgrp
->conf
, updgrp
->afi
, updgrp
->safi
);
744 if (updgrp
->conf
->host
)
745 XFREE(MTYPE_BGP_PEER_HOST
, updgrp
->conf
->host
);
746 updgrp
->conf
->host
= NULL
;
748 if (updgrp
->conf
->ifname
)
749 XFREE(MTYPE_BGP_PEER_IFNAME
, updgrp
->conf
->ifname
);
751 XFREE(MTYPE_BGP_PEER
, updgrp
->conf
);
752 XFREE(MTYPE_BGP_UPDGRP
, updgrp
);
755 static void update_group_add_subgroup(struct update_group
*updgrp
,
756 struct update_subgroup
*subgrp
)
758 if (!updgrp
|| !subgrp
)
761 LIST_INSERT_HEAD(&(updgrp
->subgrps
), subgrp
, updgrp_train
);
762 subgrp
->update_group
= updgrp
;
765 static void update_group_remove_subgroup(struct update_group
*updgrp
,
766 struct update_subgroup
*subgrp
)
768 if (!updgrp
|| !subgrp
)
771 LIST_REMOVE(subgrp
, updgrp_train
);
772 subgrp
->update_group
= NULL
;
773 if (LIST_EMPTY(&(updgrp
->subgrps
)))
774 update_group_delete(updgrp
);
777 static struct update_subgroup
*
778 update_subgroup_create(struct update_group
*updgrp
)
780 struct update_subgroup
*subgrp
;
782 subgrp
= XCALLOC(MTYPE_BGP_UPD_SUBGRP
, sizeof(struct update_subgroup
));
783 update_subgroup_checkin(subgrp
, updgrp
);
784 subgrp
->v_coalesce
= (UPDGRP_INST(updgrp
))->coalesce_time
;
786 bpacket_queue_init(SUBGRP_PKTQ(subgrp
));
787 bpacket_queue_add(SUBGRP_PKTQ(subgrp
), NULL
, NULL
);
788 TAILQ_INIT(&(subgrp
->adjq
));
789 if (BGP_DEBUG(update_groups
, UPDATE_GROUPS
))
790 zlog_debug("create subgroup u%" PRIu64
":s%" PRIu64
, updgrp
->id
,
793 update_group_add_subgroup(updgrp
, subgrp
);
795 UPDGRP_INCR_STAT(updgrp
, subgrps_created
);
800 static void update_subgroup_delete(struct update_subgroup
*subgrp
)
805 if (subgrp
->update_group
)
806 UPDGRP_INCR_STAT(subgrp
->update_group
, subgrps_deleted
);
808 if (subgrp
->t_merge_check
)
809 THREAD_OFF(subgrp
->t_merge_check
);
811 if (subgrp
->t_coalesce
)
812 THREAD_TIMER_OFF(subgrp
->t_coalesce
);
814 bpacket_queue_cleanup(SUBGRP_PKTQ(subgrp
));
815 subgroup_clear_table(subgrp
);
817 if (subgrp
->t_coalesce
)
818 THREAD_TIMER_OFF(subgrp
->t_coalesce
);
821 if (BGP_DEBUG(update_groups
, UPDATE_GROUPS
) && subgrp
->update_group
)
822 zlog_debug("delete subgroup u%" PRIu64
":s%" PRIu64
,
823 subgrp
->update_group
->id
, subgrp
->id
);
825 update_group_remove_subgroup(subgrp
->update_group
, subgrp
);
827 XFREE(MTYPE_BGP_UPD_SUBGRP
, subgrp
);
830 void update_subgroup_inherit_info(struct update_subgroup
*to
,
831 struct update_subgroup
*from
)
836 to
->sflags
= from
->sflags
;
840 * update_subgroup_check_delete
842 * Delete a subgroup if it is ready to be deleted.
844 * Returns TRUE if the subgroup was deleted.
846 static int update_subgroup_check_delete(struct update_subgroup
*subgrp
)
851 if (!LIST_EMPTY(&(subgrp
->peers
)))
854 update_subgroup_delete(subgrp
);
860 * update_subgroup_add_peer
862 * @param send_enqueued_packets If true all currently enqueued packets will
863 * also be sent to the peer.
865 static void update_subgroup_add_peer(struct update_subgroup
*subgrp
,
867 int send_enqueued_pkts
)
874 LIST_INSERT_HEAD(&(subgrp
->peers
), paf
, subgrp_train
);
875 paf
->subgroup
= subgrp
;
876 subgrp
->peer_count
++;
878 if (bgp_debug_peer_updout_enabled(paf
->peer
->host
)) {
879 UPDGRP_PEER_DBG_EN(subgrp
->update_group
);
882 SUBGRP_INCR_STAT(subgrp
, join_events
);
884 if (send_enqueued_pkts
) {
885 pkt
= bpacket_queue_first(SUBGRP_PKTQ(subgrp
));
889 * Hang the peer off of the last, placeholder, packet in the
890 * queue. This means it won't see any of the packets that are
891 * currently the queue.
893 pkt
= bpacket_queue_last(SUBGRP_PKTQ(subgrp
));
894 assert(pkt
->buffer
== NULL
);
897 bpacket_add_peer(pkt
, paf
);
899 bpacket_queue_sanity_check(SUBGRP_PKTQ(subgrp
));
903 * update_subgroup_remove_peer_internal
905 * Internal function that removes a peer from a subgroup, but does not
906 * delete the subgroup. A call to this function must almost always be
907 * followed by a call to update_subgroup_check_delete().
909 * @see update_subgroup_remove_peer
911 static void update_subgroup_remove_peer_internal(struct update_subgroup
*subgrp
,
914 assert(subgrp
&& paf
&& subgrp
->update_group
);
916 if (bgp_debug_peer_updout_enabled(paf
->peer
->host
)) {
917 UPDGRP_PEER_DBG_DIS(subgrp
->update_group
);
920 bpacket_queue_remove_peer(paf
);
921 LIST_REMOVE(paf
, subgrp_train
);
922 paf
->subgroup
= NULL
;
923 subgrp
->peer_count
--;
925 SUBGRP_INCR_STAT(subgrp
, prune_events
);
929 * update_subgroup_remove_peer
931 void update_subgroup_remove_peer(struct update_subgroup
*subgrp
,
937 update_subgroup_remove_peer_internal(subgrp
, paf
);
939 if (update_subgroup_check_delete(subgrp
))
943 * The deletion of the peer may have caused some packets to be
944 * deleted from the subgroup packet queue. Check if the subgroup can
947 update_subgroup_check_merge(subgrp
, "removed peer from subgroup");
950 static struct update_subgroup
*update_subgroup_find(struct update_group
*updgrp
,
953 struct update_subgroup
*subgrp
= NULL
;
962 if (!peer_established(PAF_PEER(paf
)))
965 UPDGRP_FOREACH_SUBGRP (updgrp
, subgrp
) {
966 if (subgrp
->version
!= version
967 || CHECK_FLAG(subgrp
->sflags
,
968 SUBGRP_STATUS_DEFAULT_ORIGINATE
))
972 * The version number is not meaningful on a subgroup that needs
975 if (update_subgroup_needs_refresh(subgrp
))
985 * update_subgroup_ready_for_merge
987 * Returns TRUE if this subgroup is in a state that allows it to be
988 * merged into another subgroup.
990 static int update_subgroup_ready_for_merge(struct update_subgroup
*subgrp
)
994 * Not ready if there are any encoded packets waiting to be written
997 if (!bpacket_queue_is_empty(SUBGRP_PKTQ(subgrp
)))
1001 * Not ready if there enqueued updates waiting to be encoded.
1003 if (!advertise_list_is_empty(subgrp
))
1007 * Don't attempt to merge a subgroup that needs a refresh. For one,
1008 * we can't determine if the adj_out of such a group matches that of
1011 if (update_subgroup_needs_refresh(subgrp
))
1018 * update_subgrp_can_merge_into
1020 * Returns TRUE if the first subgroup can merge into the second
1023 static int update_subgroup_can_merge_into(struct update_subgroup
*subgrp
,
1024 struct update_subgroup
*target
)
1027 if (subgrp
== target
)
1031 * Both must have processed the BRIB to the same point in order to
1034 if (subgrp
->version
!= target
->version
)
1037 if (CHECK_FLAG(subgrp
->sflags
, SUBGRP_STATUS_DEFAULT_ORIGINATE
)
1038 != CHECK_FLAG(target
->sflags
, SUBGRP_STATUS_DEFAULT_ORIGINATE
))
1041 if (subgrp
->adj_count
!= target
->adj_count
)
1044 return update_subgroup_ready_for_merge(target
);
1048 * update_subgroup_merge
1050 * Merge the first subgroup into the second one.
1052 static void update_subgroup_merge(struct update_subgroup
*subgrp
,
1053 struct update_subgroup
*target
,
1056 struct peer_af
*paf
;
1060 assert(subgrp
->adj_count
== target
->adj_count
);
1062 peer_count
= subgrp
->peer_count
;
1065 paf
= LIST_FIRST(&subgrp
->peers
);
1069 update_subgroup_remove_peer_internal(subgrp
, paf
);
1072 * Add the peer to the target subgroup, while making sure that
1073 * any currently enqueued packets won't be sent to it. Enqueued
1074 * packets could, for example, result in an unnecessary withdraw
1075 * followed by an advertise.
1077 update_subgroup_add_peer(target
, paf
, 0);
1080 SUBGRP_INCR_STAT(target
, merge_events
);
1082 if (BGP_DEBUG(update_groups
, UPDATE_GROUPS
))
1083 zlog_debug("u%" PRIu64
":s%" PRIu64
1084 " (%d peers) merged into u%" PRIu64
":s%" PRIu64
1087 subgrp
->update_group
->id
, subgrp
->id
, peer_count
,
1088 target
->update_group
->id
, target
->id
,
1089 reason
? reason
: "unknown");
1091 result
= update_subgroup_check_delete(subgrp
);
1096 * update_subgroup_check_merge
1098 * Merge this subgroup into another subgroup if possible.
1100 * Returns TRUE if the subgroup has been merged. The subgroup pointer
1101 * should not be accessed in this case.
1103 int update_subgroup_check_merge(struct update_subgroup
*subgrp
,
1106 struct update_subgroup
*target
;
1108 if (!update_subgroup_ready_for_merge(subgrp
))
1112 * Look for a subgroup to merge into.
1114 UPDGRP_FOREACH_SUBGRP (subgrp
->update_group
, target
) {
1115 if (update_subgroup_can_merge_into(subgrp
, target
))
1122 update_subgroup_merge(subgrp
, target
, reason
);
1127 * update_subgroup_merge_check_thread_cb
1129 static int update_subgroup_merge_check_thread_cb(struct thread
*thread
)
1131 struct update_subgroup
*subgrp
;
1133 subgrp
= THREAD_ARG(thread
);
1135 subgrp
->t_merge_check
= NULL
;
1137 update_subgroup_check_merge(subgrp
, "triggered merge check");
1142 * update_subgroup_trigger_merge_check
1144 * Triggers a call to update_subgroup_check_merge() on a clean context.
1146 * @param force If true, the merge check will be triggered even if the
1147 * subgroup doesn't currently look ready for a merge.
1149 * Returns TRUE if a merge check will be performed shortly.
1151 int update_subgroup_trigger_merge_check(struct update_subgroup
*subgrp
,
1154 if (subgrp
->t_merge_check
)
1157 if (!force
&& !update_subgroup_ready_for_merge(subgrp
))
1160 subgrp
->t_merge_check
= NULL
;
1161 thread_add_timer_msec(bm
->master
, update_subgroup_merge_check_thread_cb
,
1162 subgrp
, 0, &subgrp
->t_merge_check
);
1164 SUBGRP_INCR_STAT(subgrp
, merge_checks_triggered
);
1170 * update_subgroup_copy_adj_out
1172 * Helper function that clones the adj out (state about advertised
1173 * routes) from one subgroup to another. It assumes that the adj out
1174 * of the target subgroup is empty.
1176 static void update_subgroup_copy_adj_out(struct update_subgroup
*source
,
1177 struct update_subgroup
*dest
)
1179 struct bgp_adj_out
*aout
, *aout_copy
;
1181 SUBGRP_FOREACH_ADJ (source
, aout
) {
1186 bgp_adj_out_alloc(dest
, aout
->rn
, aout
->addpath_tx_id
);
1188 aout
->attr
? bgp_attr_intern(aout
->attr
) : NULL
;
1191 dest
->scount
= source
->scount
;
1195 * update_subgroup_copy_packets
1197 * Copy packets after and including the given packet to the subgroup
1200 * Returns the number of packets copied.
1202 static int update_subgroup_copy_packets(struct update_subgroup
*dest
,
1203 struct bpacket
*pkt
)
1208 while (pkt
&& pkt
->buffer
) {
1209 bpacket_queue_add(SUBGRP_PKTQ(dest
), stream_dup(pkt
->buffer
),
1212 pkt
= bpacket_next(pkt
);
1215 bpacket_queue_sanity_check(SUBGRP_PKTQ(dest
));
1220 static int updgrp_prefix_list_update(struct update_group
*updgrp
,
1224 struct bgp_filter
*filter
;
1226 peer
= UPDGRP_PEER(updgrp
);
1227 filter
= &peer
->filter
[UPDGRP_AFI(updgrp
)][UPDGRP_SAFI(updgrp
)];
1229 if (PREFIX_LIST_OUT_NAME(filter
)
1230 && (strcmp(name
, PREFIX_LIST_OUT_NAME(filter
)) == 0)) {
1231 PREFIX_LIST_OUT(filter
) = prefix_list_lookup(
1232 UPDGRP_AFI(updgrp
), PREFIX_LIST_OUT_NAME(filter
));
1238 static int updgrp_filter_list_update(struct update_group
*updgrp
,
1242 struct bgp_filter
*filter
;
1244 peer
= UPDGRP_PEER(updgrp
);
1245 filter
= &peer
->filter
[UPDGRP_AFI(updgrp
)][UPDGRP_SAFI(updgrp
)];
1247 if (FILTER_LIST_OUT_NAME(filter
)
1248 && (strcmp(name
, FILTER_LIST_OUT_NAME(filter
)) == 0)) {
1249 FILTER_LIST_OUT(filter
) =
1250 as_list_lookup(FILTER_LIST_OUT_NAME(filter
));
1256 static int updgrp_distribute_list_update(struct update_group
*updgrp
,
1260 struct bgp_filter
*filter
;
1262 peer
= UPDGRP_PEER(updgrp
);
1263 filter
= &peer
->filter
[UPDGRP_AFI(updgrp
)][UPDGRP_SAFI(updgrp
)];
1265 if (DISTRIBUTE_OUT_NAME(filter
)
1266 && (strcmp(name
, DISTRIBUTE_OUT_NAME(filter
)) == 0)) {
1267 DISTRIBUTE_OUT(filter
) = access_list_lookup(
1268 UPDGRP_AFI(updgrp
), DISTRIBUTE_OUT_NAME(filter
));
1274 static int updgrp_route_map_update(struct update_group
*updgrp
,
1275 const char *name
, int *def_rmap_changed
)
1278 struct bgp_filter
*filter
;
1283 peer
= UPDGRP_PEER(updgrp
);
1284 afi
= UPDGRP_AFI(updgrp
);
1285 safi
= UPDGRP_SAFI(updgrp
);
1286 filter
= &peer
->filter
[afi
][safi
];
1288 if (ROUTE_MAP_OUT_NAME(filter
)
1289 && (strcmp(name
, ROUTE_MAP_OUT_NAME(filter
)) == 0)) {
1290 ROUTE_MAP_OUT(filter
) = route_map_lookup_by_name(name
);
1295 if (UNSUPPRESS_MAP_NAME(filter
)
1296 && (strcmp(name
, UNSUPPRESS_MAP_NAME(filter
)) == 0)) {
1297 UNSUPPRESS_MAP(filter
) = route_map_lookup_by_name(name
);
1301 /* process default-originate route-map */
1302 if (peer
->default_rmap
[afi
][safi
].name
1303 && (strcmp(name
, peer
->default_rmap
[afi
][safi
].name
) == 0)) {
1304 peer
->default_rmap
[afi
][safi
].map
=
1305 route_map_lookup_by_name(name
);
1306 if (def_rmap_changed
)
1307 *def_rmap_changed
= 1;
1313 * hash iteration callback function to process a policy change for an
1314 * update group. Check if the changed policy matches the updgrp's
1315 * outbound route-map or unsuppress-map or default-originate map or
1316 * filter-list or prefix-list or distribute-list.
1317 * Trigger update generation accordingly.
1319 static int updgrp_policy_update_walkcb(struct update_group
*updgrp
, void *arg
)
1321 struct updwalk_context
*ctx
= arg
;
1322 struct update_subgroup
*subgrp
;
1324 int def_changed
= 0;
1326 if (!updgrp
|| !ctx
|| !ctx
->policy_name
)
1327 return UPDWALK_CONTINUE
;
1329 switch (ctx
->policy_type
) {
1330 case BGP_POLICY_ROUTE_MAP
:
1331 changed
= updgrp_route_map_update(updgrp
, ctx
->policy_name
,
1334 case BGP_POLICY_FILTER_LIST
:
1335 changed
= updgrp_filter_list_update(updgrp
, ctx
->policy_name
);
1337 case BGP_POLICY_PREFIX_LIST
:
1338 changed
= updgrp_prefix_list_update(updgrp
, ctx
->policy_name
);
1340 case BGP_POLICY_DISTRIBUTE_LIST
:
1342 updgrp_distribute_list_update(updgrp
, ctx
->policy_name
);
1348 /* If not doing route update, return after updating "config" */
1349 if (!ctx
->policy_route_update
)
1350 return UPDWALK_CONTINUE
;
1352 /* If nothing has changed, return after updating "config" */
1353 if (!changed
&& !def_changed
)
1354 return UPDWALK_CONTINUE
;
1357 * If something has changed, at the beginning of a route-map
1359 * event, mark each subgroup's needs-refresh bit. For one, it signals to
1360 * whoever that the subgroup needs a refresh. Second, it prevents
1362 * merge of this subgroup with another before a complete (outbound)
1365 if (ctx
->policy_event_start_flag
) {
1366 UPDGRP_FOREACH_SUBGRP (updgrp
, subgrp
) {
1367 update_subgroup_set_needs_refresh(subgrp
, 1);
1369 return UPDWALK_CONTINUE
;
1372 UPDGRP_FOREACH_SUBGRP (updgrp
, subgrp
) {
1374 if (bgp_debug_update(NULL
, NULL
, updgrp
, 0))
1376 "u%" PRIu64
":s%" PRIu64
1377 " announcing routes upon policy %s (type %d) change",
1378 updgrp
->id
, subgrp
->id
,
1379 ctx
->policy_name
, ctx
->policy_type
);
1380 subgroup_announce_route(subgrp
);
1383 if (bgp_debug_update(NULL
, NULL
, updgrp
, 0))
1385 "u%" PRIu64
":s%" PRIu64
1386 " announcing default upon default routemap %s change",
1387 updgrp
->id
, subgrp
->id
,
1389 subgroup_default_originate(subgrp
, 0);
1391 update_subgroup_set_needs_refresh(subgrp
, 0);
1393 return UPDWALK_CONTINUE
;
1396 static int update_group_walkcb(struct hash_backet
*backet
, void *arg
)
1398 struct update_group
*updgrp
= backet
->data
;
1399 struct updwalk_context
*wctx
= arg
;
1400 int ret
= (*wctx
->cb
)(updgrp
, wctx
->context
);
1404 static int update_group_periodic_merge_walkcb(struct update_group
*updgrp
,
1407 struct update_subgroup
*subgrp
;
1408 struct update_subgroup
*tmp_subgrp
;
1409 const char *reason
= arg
;
1411 UPDGRP_FOREACH_SUBGRP_SAFE (updgrp
, subgrp
, tmp_subgrp
)
1412 update_subgroup_check_merge(subgrp
, reason
);
1413 return UPDWALK_CONTINUE
;
1416 /********************
1418 ********************/
1421 * trigger function when a policy (route-map/filter-list/prefix-list/
1422 * distribute-list etc.) content changes. Go through all the
1423 * update groups and process the change.
1425 * bgp: the bgp instance
1426 * ptype: the type of policy that got modified, see bgpd.h
1427 * pname: name of the policy
1428 * route_update: flag to control if an automatic update generation should
1430 * start_event: flag that indicates if it's the beginning of the change.
1431 * Esp. when the user is changing the content interactively
1432 * over multiple statements. Useful to set dirty flag on
1435 void update_group_policy_update(struct bgp
*bgp
, bgp_policy_type_e ptype
,
1436 const char *pname
, int route_update
,
1439 struct updwalk_context ctx
;
1441 memset(&ctx
, 0, sizeof(ctx
));
1442 ctx
.policy_type
= ptype
;
1443 ctx
.policy_name
= pname
;
1444 ctx
.policy_route_update
= route_update
;
1445 ctx
.policy_event_start_flag
= start_event
;
1448 update_group_walk(bgp
, updgrp_policy_update_walkcb
, &ctx
);
1452 * update_subgroup_split_peer
1454 * Ensure that the given peer is in a subgroup of its own in the
1455 * specified update group.
1457 void update_subgroup_split_peer(struct peer_af
*paf
,
1458 struct update_group
*updgrp
)
1460 struct update_subgroup
*old_subgrp
, *subgrp
;
1464 old_subgrp
= paf
->subgroup
;
1467 updgrp
= old_subgrp
->update_group
;
1470 * If the peer is alone in its subgroup, reuse the existing
1473 if (old_subgrp
->peer_count
== 1) {
1474 if (updgrp
== old_subgrp
->update_group
)
1477 subgrp
= old_subgrp
;
1478 old_id
= old_subgrp
->update_group
->id
;
1480 if (bgp_debug_peer_updout_enabled(paf
->peer
->host
)) {
1481 UPDGRP_PEER_DBG_DIS(old_subgrp
->update_group
);
1484 update_group_remove_subgroup(old_subgrp
->update_group
,
1486 update_group_add_subgroup(updgrp
, subgrp
);
1488 if (bgp_debug_peer_updout_enabled(paf
->peer
->host
)) {
1489 UPDGRP_PEER_DBG_EN(updgrp
);
1491 if (BGP_DEBUG(update_groups
, UPDATE_GROUPS
))
1492 zlog_debug("u%" PRIu64
":s%" PRIu64
1493 " peer %s moved to u%" PRIu64
":s%" PRIu64
,
1494 old_id
, subgrp
->id
, paf
->peer
->host
,
1495 updgrp
->id
, subgrp
->id
);
1498 * The state of the subgroup (adj_out, advs, packet queue etc)
1499 * is consistent internally, but may not be identical to other
1500 * subgroups in the new update group even if the version number
1501 * matches up. Make sure a full refresh is done before the
1502 * subgroup is merged with another.
1504 update_subgroup_set_needs_refresh(subgrp
, 1);
1506 SUBGRP_INCR_STAT(subgrp
, updgrp_switch_events
);
1511 * Create a new subgroup under the specified update group, and copy
1512 * over relevant state to it.
1514 subgrp
= update_subgroup_create(updgrp
);
1515 update_subgroup_inherit_info(subgrp
, old_subgrp
);
1517 subgrp
->split_from
.update_group_id
= old_subgrp
->update_group
->id
;
1518 subgrp
->split_from
.subgroup_id
= old_subgrp
->id
;
1521 * Copy out relevant state from the old subgroup.
1523 update_subgroup_copy_adj_out(paf
->subgroup
, subgrp
);
1524 update_subgroup_copy_packets(subgrp
, paf
->next_pkt_to_send
);
1526 if (BGP_DEBUG(update_groups
, UPDATE_GROUPS
))
1527 zlog_debug("u%" PRIu64
":s%" PRIu64
1528 " peer %s split and moved into u%" PRIu64
1530 paf
->subgroup
->update_group
->id
, paf
->subgroup
->id
,
1531 paf
->peer
->host
, updgrp
->id
, subgrp
->id
);
1533 SUBGRP_INCR_STAT(paf
->subgroup
, split_events
);
1536 * Since queued advs were left behind, this new subgroup needs a
1539 update_subgroup_set_needs_refresh(subgrp
, 1);
1542 * Remove peer from old subgroup, and add it to the new one.
1544 update_subgroup_remove_peer(paf
->subgroup
, paf
);
1546 update_subgroup_add_peer(subgrp
, paf
, 1);
1549 void update_bgp_group_init(struct bgp
*bgp
)
1554 bgp
->update_groups
[afid
] =
1555 hash_create(updgrp_hash_key_make
, updgrp_hash_cmp
,
1556 "BGP Update Group Hash");
1559 void update_bgp_group_free(struct bgp
*bgp
)
1564 if (bgp
->update_groups
[afid
]) {
1565 hash_free(bgp
->update_groups
[afid
]);
1566 bgp
->update_groups
[afid
] = NULL
;
1571 void update_group_show(struct bgp
*bgp
, afi_t afi
, safi_t safi
, struct vty
*vty
,
1574 struct updwalk_context ctx
;
1575 memset(&ctx
, 0, sizeof(ctx
));
1577 ctx
.subgrp_id
= subgrp_id
;
1579 update_group_af_walk(bgp
, afi
, safi
, update_group_show_walkcb
, &ctx
);
1583 * update_group_show_stats
1585 * Show global statistics about update groups.
1587 void update_group_show_stats(struct bgp
*bgp
, struct vty
*vty
)
1589 vty_out(vty
, "Update groups created: %u\n",
1590 bgp
->update_group_stats
.updgrps_created
);
1591 vty_out(vty
, "Update groups deleted: %u\n",
1592 bgp
->update_group_stats
.updgrps_deleted
);
1593 vty_out(vty
, "Update subgroups created: %u\n",
1594 bgp
->update_group_stats
.subgrps_created
);
1595 vty_out(vty
, "Update subgroups deleted: %u\n",
1596 bgp
->update_group_stats
.subgrps_deleted
);
1597 vty_out(vty
, "Join events: %u\n", bgp
->update_group_stats
.join_events
);
1598 vty_out(vty
, "Prune events: %u\n",
1599 bgp
->update_group_stats
.prune_events
);
1600 vty_out(vty
, "Merge events: %u\n",
1601 bgp
->update_group_stats
.merge_events
);
1602 vty_out(vty
, "Split events: %u\n",
1603 bgp
->update_group_stats
.split_events
);
1604 vty_out(vty
, "Update group switch events: %u\n",
1605 bgp
->update_group_stats
.updgrp_switch_events
);
1606 vty_out(vty
, "Peer route refreshes combined: %u\n",
1607 bgp
->update_group_stats
.peer_refreshes_combined
);
1608 vty_out(vty
, "Merge checks triggered: %u\n",
1609 bgp
->update_group_stats
.merge_checks_triggered
);
1613 * update_group_adjust_peer
1615 void update_group_adjust_peer(struct peer_af
*paf
)
1617 struct update_group
*updgrp
;
1618 struct update_subgroup
*subgrp
, *old_subgrp
;
1624 peer
= PAF_PEER(paf
);
1625 if (!peer_established(peer
)) {
1629 if (!CHECK_FLAG(peer
->flags
, PEER_FLAG_CONFIG_NODE
)) {
1633 if (!peer
->afc_nego
[paf
->afi
][paf
->safi
]) {
1637 updgrp
= update_group_find(paf
);
1639 updgrp
= update_group_create(paf
);
1641 flog_err(EC_BGP_UPDGRP_CREATE
,
1642 "couldn't create update group for peer %s",
1648 old_subgrp
= paf
->subgroup
;
1653 * If the update group of the peer is unchanged, the peer can
1655 * in its existing subgroup and we're done.
1657 if (old_subgrp
->update_group
== updgrp
)
1661 * The peer is switching between update groups. Put it in its
1662 * own subgroup under the new update group.
1664 update_subgroup_split_peer(paf
, updgrp
);
1668 subgrp
= update_subgroup_find(updgrp
, paf
);
1670 subgrp
= update_subgroup_create(updgrp
);
1675 update_subgroup_add_peer(subgrp
, paf
, 1);
1676 if (BGP_DEBUG(update_groups
, UPDATE_GROUPS
))
1677 zlog_debug("u%" PRIu64
":s%" PRIu64
" add peer %s", updgrp
->id
,
1678 subgrp
->id
, paf
->peer
->host
);
1683 int update_group_adjust_soloness(struct peer
*peer
, int set
)
1685 struct peer_group
*group
;
1686 struct listnode
*node
, *nnode
;
1688 if (!CHECK_FLAG(peer
->sflags
, PEER_STATUS_GROUP
)) {
1689 peer_lonesoul_or_not(peer
, set
);
1690 if (peer
->status
== Established
)
1691 bgp_announce_route_all(peer
);
1693 group
= peer
->group
;
1694 for (ALL_LIST_ELEMENTS(group
->peer
, node
, nnode
, peer
)) {
1695 peer_lonesoul_or_not(peer
, set
);
1696 if (peer
->status
== Established
)
1697 bgp_announce_route_all(peer
);
1704 * update_subgroup_rib
1706 struct bgp_table
*update_subgroup_rib(struct update_subgroup
*subgrp
)
1710 bgp
= SUBGRP_INST(subgrp
);
1714 return bgp
->rib
[SUBGRP_AFI(subgrp
)][SUBGRP_SAFI(subgrp
)];
1717 void update_group_af_walk(struct bgp
*bgp
, afi_t afi
, safi_t safi
,
1718 updgrp_walkcb cb
, void *ctx
)
1720 struct updwalk_context wctx
;
1725 afid
= afindex(afi
, safi
);
1726 if (afid
>= BGP_AF_MAX
)
1729 memset(&wctx
, 0, sizeof(wctx
));
1733 if (bgp
->update_groups
[afid
])
1734 hash_walk(bgp
->update_groups
[afid
], update_group_walkcb
, &wctx
);
1737 void update_group_walk(struct bgp
*bgp
, updgrp_walkcb cb
, void *ctx
)
1742 FOREACH_AFI_SAFI (afi
, safi
) {
1743 update_group_af_walk(bgp
, afi
, safi
, cb
, ctx
);
1747 void update_group_periodic_merge(struct bgp
*bgp
)
1749 char reason
[] = "periodic merge check";
1751 update_group_walk(bgp
, update_group_periodic_merge_walkcb
,
1756 update_group_default_originate_route_map_walkcb(struct update_group
*updgrp
,
1759 struct update_subgroup
*subgrp
;
1764 UPDGRP_FOREACH_SUBGRP (updgrp
, subgrp
) {
1765 peer
= SUBGRP_PEER(subgrp
);
1766 afi
= SUBGRP_AFI(subgrp
);
1767 safi
= SUBGRP_SAFI(subgrp
);
1769 if (peer
->default_rmap
[afi
][safi
].name
) {
1770 subgroup_default_originate(subgrp
, 0);
1774 return UPDWALK_CONTINUE
;
1777 int update_group_refresh_default_originate_route_map(struct thread
*thread
)
1780 char reason
[] = "refresh default-originate route-map";
1782 bgp
= THREAD_ARG(thread
);
1783 update_group_walk(bgp
, update_group_default_originate_route_map_walkcb
,
1785 THREAD_TIMER_OFF(bgp
->t_rmap_def_originate_eval
);
1792 * peer_af_announce_route
1794 * Refreshes routes out to a peer_af immediately.
1796 * If the combine parameter is TRUE, then this function will try to
1797 * gather other peers in the subgroup for which a route announcement
1798 * is pending and efficently announce routes to all of them.
1800 * For now, the 'combine' option has an effect only if all peers in
1801 * the subgroup have a route announcement pending.
1803 void peer_af_announce_route(struct peer_af
*paf
, int combine
)
1805 struct update_subgroup
*subgrp
;
1806 struct peer_af
*cur_paf
;
1809 subgrp
= paf
->subgroup
;
1814 * If there are other peers in the old subgroup that also need
1815 * routes to be announced, pull them into the peer's new
1817 * Combine route announcement with other peers if possible.
1819 * For now, we combine only if all peers in the subgroup have an
1820 * announcement pending.
1824 SUBGRP_FOREACH_PEER (subgrp
, cur_paf
) {
1828 if (cur_paf
->t_announce_route
)
1836 * Announce to the peer alone if we were not asked to combine peers,
1837 * or if some peers don't have a route annoucement pending.
1839 if (!combine
|| !all_pending
) {
1840 update_subgroup_split_peer(paf
, NULL
);
1844 if (bgp_debug_update(paf
->peer
, NULL
, subgrp
->update_group
, 0))
1845 zlog_debug("u%" PRIu64
":s%" PRIu64
1846 " %s announcing routes",
1847 subgrp
->update_group
->id
, subgrp
->id
,
1850 subgroup_announce_route(paf
->subgroup
);
1855 * We will announce routes the entire subgroup.
1857 * First stop refresh timers on all the other peers.
1859 SUBGRP_FOREACH_PEER (subgrp
, cur_paf
) {
1863 bgp_stop_announce_route_timer(cur_paf
);
1866 if (bgp_debug_update(paf
->peer
, NULL
, subgrp
->update_group
, 0))
1867 zlog_debug("u%" PRIu64
":s%" PRIu64
1868 " announcing routes to %s, combined into %d peers",
1869 subgrp
->update_group
->id
, subgrp
->id
,
1870 paf
->peer
->host
, subgrp
->peer_count
);
1872 subgroup_announce_route(subgrp
);
1874 SUBGRP_INCR_STAT_BY(subgrp
, peer_refreshes_combined
,
1875 subgrp
->peer_count
- 1);
1878 void subgroup_trigger_write(struct update_subgroup
*subgrp
)
1880 struct peer_af
*paf
;
1883 * For each peer in the subgroup, schedule a job to pull packets from
1884 * the subgroup output queue into their own output queue. This action
1885 * will trigger a write job on the I/O thread.
1887 SUBGRP_FOREACH_PEER (subgrp
, paf
)
1888 if (paf
->peer
->status
== Established
)
1889 thread_add_timer_msec(
1890 bm
->master
, bgp_generate_updgrp_packets
,
1892 &paf
->peer
->t_generate_updgrp_packets
);
1895 int update_group_clear_update_dbg(struct update_group
*updgrp
, void *arg
)
1897 UPDGRP_PEER_DBG_OFF(updgrp
);
1898 return UPDWALK_CONTINUE
;
1901 /* Return true if we should addpath encode NLRI to this peer */
1902 int bgp_addpath_encode_tx(struct peer
*peer
, afi_t afi
, safi_t safi
)
1904 return (CHECK_FLAG(peer
->af_cap
[afi
][safi
], PEER_CAP_ADDPATH_AF_TX_ADV
)
1905 && CHECK_FLAG(peer
->af_cap
[afi
][safi
],
1906 PEER_CAP_ADDPATH_AF_RX_RCV
));