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_fsm.h"
51 #include "bgpd/bgp_advertise.h"
52 #include "bgpd/bgp_packet.h"
53 #include "bgpd/bgp_updgrp.h"
54 #include "bgpd/bgp_route.h"
55 #include "bgpd/bgp_filter.h"
62 * assign a unique ID to update group and subgroup. Mostly for display/
63 * debugging purposes. It's a 64-bit space - used leisurely without a
64 * worry about its wrapping and about filling gaps. While at it, timestamp
68 update_group_checkin (struct update_group
*updgrp
)
70 updgrp
->id
= ++bm
->updgrp_idspace
;
71 updgrp
->uptime
= bgp_clock ();
75 update_subgroup_checkin (struct update_subgroup
*subgrp
,
76 struct update_group
*updgrp
)
78 subgrp
->id
= ++bm
->subgrp_idspace
;
79 subgrp
->uptime
= bgp_clock ();
83 sync_init (struct update_subgroup
*subgrp
)
85 subgrp
->sync
= XCALLOC (MTYPE_BGP_SYNCHRONISE
,
86 sizeof (struct bgp_synchronize
));
87 BGP_ADV_FIFO_INIT (&subgrp
->sync
->update
);
88 BGP_ADV_FIFO_INIT (&subgrp
->sync
->withdraw
);
89 BGP_ADV_FIFO_INIT (&subgrp
->sync
->withdraw_low
);
90 subgrp
->hash
= hash_create (baa_hash_key
, baa_hash_cmp
);
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 CMD_ARGC_MAX
97 * args in a route-map so there is a finite limit on how large they can
98 * make the attributes.
100 * Having a buffer with BGP_MAX_PACKET_SIZE_OVERFLOW allows us to avoid bounds
101 * checking for every single attribute as we construct an UPDATE.
103 subgrp
->work
= stream_new (BGP_MAX_PACKET_SIZE
+ BGP_MAX_PACKET_SIZE_OVERFLOW
);
104 subgrp
->scratch
= stream_new (BGP_MAX_PACKET_SIZE
);
108 sync_delete (struct update_subgroup
*subgrp
)
111 XFREE (MTYPE_BGP_SYNCHRONISE
, subgrp
->sync
);
114 hash_free (subgrp
->hash
);
117 stream_free (subgrp
->work
);
120 stream_free (subgrp
->scratch
);
121 subgrp
->scratch
= NULL
;
127 * copy only those fields that are relevant to update group match
130 conf_copy (struct peer
*dst
, struct peer
*src
, afi_t afi
, safi_t safi
)
132 struct bgp_filter
*srcfilter
;
133 struct bgp_filter
*dstfilter
;
135 srcfilter
= &src
->filter
[afi
][safi
];
136 dstfilter
= &dst
->filter
[afi
][safi
];
139 dst
->sort
= src
->sort
;
141 dst
->v_routeadv
= src
->v_routeadv
;
142 dst
->flags
= src
->flags
;
143 dst
->af_flags
[afi
][safi
] = src
->af_flags
[afi
][safi
];
145 XFREE(MTYPE_BGP_PEER_HOST
, dst
->host
);
147 dst
->host
= XSTRDUP(MTYPE_BGP_PEER_HOST
, src
->host
);
149 dst
->af_cap
[afi
][safi
] = src
->af_cap
[afi
][safi
];
150 dst
->afc_nego
[afi
][safi
] = src
->afc_nego
[afi
][safi
];
151 dst
->orf_plist
[afi
][safi
] = src
->orf_plist
[afi
][safi
];
152 dst
->local_as
= src
->local_as
;
153 dst
->change_local_as
= src
->change_local_as
;
154 dst
->shared_network
= src
->shared_network
;
155 memcpy (&(dst
->nexthop
), &(src
->nexthop
), sizeof (struct bgp_nexthop
));
157 dst
->group
= src
->group
;
159 if (src
->default_rmap
[afi
][safi
].name
)
161 dst
->default_rmap
[afi
][safi
].name
=
162 XSTRDUP(MTYPE_ROUTE_MAP_NAME
, src
->default_rmap
[afi
][safi
].name
);
163 dst
->default_rmap
[afi
][safi
].map
= src
->default_rmap
[afi
][safi
].map
;
166 if (DISTRIBUTE_OUT_NAME(srcfilter
))
168 DISTRIBUTE_OUT_NAME(dstfilter
) = XSTRDUP(MTYPE_BGP_FILTER_NAME
, DISTRIBUTE_OUT_NAME(srcfilter
));
169 DISTRIBUTE_OUT(dstfilter
) = DISTRIBUTE_OUT(srcfilter
);
172 if (PREFIX_LIST_OUT_NAME(srcfilter
))
174 PREFIX_LIST_OUT_NAME(dstfilter
) = XSTRDUP(MTYPE_BGP_FILTER_NAME
, PREFIX_LIST_OUT_NAME(srcfilter
));
175 PREFIX_LIST_OUT(dstfilter
) = PREFIX_LIST_OUT(srcfilter
);
178 if (FILTER_LIST_OUT_NAME(srcfilter
))
180 FILTER_LIST_OUT_NAME(dstfilter
) = XSTRDUP(MTYPE_BGP_FILTER_NAME
, FILTER_LIST_OUT_NAME(srcfilter
));
181 FILTER_LIST_OUT(dstfilter
) = FILTER_LIST_OUT(srcfilter
);
184 if (ROUTE_MAP_OUT_NAME(srcfilter
))
186 ROUTE_MAP_OUT_NAME(dstfilter
) = XSTRDUP(MTYPE_BGP_FILTER_NAME
, ROUTE_MAP_OUT_NAME(srcfilter
));
187 ROUTE_MAP_OUT(dstfilter
) = ROUTE_MAP_OUT(srcfilter
);
190 if (UNSUPPRESS_MAP_NAME(srcfilter
))
192 UNSUPPRESS_MAP_NAME(dstfilter
) = XSTRDUP(MTYPE_BGP_FILTER_NAME
, UNSUPPRESS_MAP_NAME(srcfilter
));
193 UNSUPPRESS_MAP(dstfilter
) = UNSUPPRESS_MAP(srcfilter
);
198 * since we did a bunch of XSTRDUP's in conf_copy, time to free them up
201 conf_release (struct peer
*src
, afi_t afi
, safi_t safi
)
203 struct bgp_filter
*srcfilter
;
205 srcfilter
= &src
->filter
[afi
][safi
];
207 if (src
->default_rmap
[afi
][safi
].name
)
208 XFREE(MTYPE_ROUTE_MAP_NAME
, src
->default_rmap
[afi
][safi
].name
);
210 if (srcfilter
->dlist
[FILTER_OUT
].name
)
211 XFREE(MTYPE_BGP_FILTER_NAME
, srcfilter
->dlist
[FILTER_OUT
].name
);
213 if (srcfilter
->plist
[FILTER_OUT
].name
)
214 XFREE(MTYPE_BGP_FILTER_NAME
, srcfilter
->plist
[FILTER_OUT
].name
);
216 if (srcfilter
->aslist
[FILTER_OUT
].name
)
217 XFREE(MTYPE_BGP_FILTER_NAME
, srcfilter
->aslist
[FILTER_OUT
].name
);
219 if (srcfilter
->map
[RMAP_OUT
].name
)
220 XFREE(MTYPE_BGP_FILTER_NAME
, srcfilter
->map
[RMAP_OUT
].name
);
222 if (srcfilter
->usmap
.name
)
223 XFREE(MTYPE_BGP_FILTER_NAME
, srcfilter
->usmap
.name
);
226 XFREE(MTYPE_BGP_PEER_HOST
, src
->host
);
231 peer2_updgrp_copy (struct update_group
*updgrp
, struct peer_af
*paf
)
244 updgrp
->afi
= paf
->afi
;
245 updgrp
->safi
= paf
->safi
;
246 updgrp
->afid
= paf
->afid
;
247 updgrp
->bgp
= src
->bgp
;
249 conf_copy (dst
, src
, paf
->afi
, paf
->safi
);
253 * auxiliary functions to maintain the hash table.
254 * - updgrp_hash_alloc - to create a new entry, passed to hash_get
255 * - updgrp_hash_key_make - makes the key for update group search
256 * - updgrp_hash_cmp - compare two update groups.
259 updgrp_hash_alloc (void *p
)
261 struct update_group
*updgrp
;
262 const struct update_group
*in
;
264 in
= (const struct update_group
*)p
;
265 updgrp
= XCALLOC (MTYPE_BGP_UPDGRP
, sizeof (struct update_group
));
266 memcpy (updgrp
, in
, sizeof (struct update_group
));
267 updgrp
->conf
= XCALLOC (MTYPE_BGP_PEER
, sizeof (struct peer
));
268 conf_copy (updgrp
->conf
, in
->conf
, in
->afi
, in
->safi
);
273 * The hash value for a peer is computed from the following variables:
275 * 1. IBGP (1) or EBGP (2)
276 * 2. FLAGS based on configuration:
277 * LOCAL_AS_NO_PREPEND
278 * LOCAL_AS_REPLACE_AS
279 * 3. AF_FLAGS based on configuration:
280 * Refer to definition in bgp_updgrp.h
281 * 4. (AF-independent) Capability flags:
283 * 5. (AF-dependent) Capability flags:
284 * ORF_PREFIX_SM_RCV (peer can send prefix ORF)
287 * 8. Outbound route-map name (neighbor route-map <> out)
288 * 9. Outbound distribute-list name (neighbor distribute-list <> out)
289 * 10. Outbound prefix-list name (neighbor prefix-list <> out)
290 * 11. Outbound as-list name (neighbor filter-list <> out)
291 * 12. Unsuppress map name (neighbor unsuppress-map <>)
292 * 13. default rmap name (neighbor default-originate route-map <>)
293 * 14. encoding both global and link-local nexthop?
294 * 15. If peer is configured to be a lonesoul, peer ip address
295 * 16. Local-as should match, if configured.
299 updgrp_hash_key_make (void *p
)
301 const struct update_group
*updgrp
;
302 const struct peer
*peer
;
303 const struct bgp_filter
*filter
;
310 #define SEED2 2147483647
316 flags
= peer
->af_flags
[afi
][safi
];
317 filter
= &peer
->filter
[afi
][safi
];
321 key
= jhash_1word (peer
->sort
, key
); /* EBGP or IBGP */
322 key
= jhash_1word ((peer
->flags
& PEER_UPDGRP_FLAGS
), key
);
323 key
= jhash_1word ((flags
& PEER_UPDGRP_AF_FLAGS
), key
);
324 key
= jhash_1word ((peer
->cap
& PEER_UPDGRP_CAP_FLAGS
), key
);
325 key
= jhash_1word ((peer
->af_cap
[afi
][safi
] &
326 PEER_UPDGRP_AF_CAP_FLAGS
), key
);
327 key
= jhash_1word (peer
->v_routeadv
, key
);
328 key
= jhash_1word (peer
->change_local_as
, key
);
331 key
= jhash_1word (jhash (peer
->group
->name
,
332 strlen (peer
->group
->name
), SEED1
), key
);
334 if (filter
->map
[RMAP_OUT
].name
)
335 key
= jhash_1word (jhash (filter
->map
[RMAP_OUT
].name
,
336 strlen (filter
->map
[RMAP_OUT
].name
), SEED1
),
339 if (filter
->dlist
[FILTER_OUT
].name
)
340 key
= jhash_1word (jhash (filter
->dlist
[FILTER_OUT
].name
,
341 strlen (filter
->dlist
[FILTER_OUT
].name
), SEED1
),
344 if (filter
->plist
[FILTER_OUT
].name
)
345 key
= jhash_1word (jhash (filter
->plist
[FILTER_OUT
].name
,
346 strlen (filter
->plist
[FILTER_OUT
].name
), SEED1
),
349 if (filter
->aslist
[FILTER_OUT
].name
)
350 key
= jhash_1word (jhash (filter
->aslist
[FILTER_OUT
].name
,
351 strlen (filter
->aslist
[FILTER_OUT
].name
),
354 if (filter
->usmap
.name
)
355 key
= jhash_1word (jhash (filter
->usmap
.name
,
356 strlen (filter
->usmap
.name
), SEED1
), key
);
358 if (peer
->default_rmap
[afi
][safi
].name
)
359 key
= jhash_1word (jhash (peer
->default_rmap
[afi
][safi
].name
,
360 strlen (peer
->default_rmap
[afi
][safi
].name
),
363 /* If peer is on a shared network and is exchanging IPv6 prefixes,
364 * it needs to include link-local address. That's different from
365 * non-shared-network peers (nexthop encoded with 32 bytes vs 16
366 * bytes). We create different update groups to take care of that.
368 key
= jhash_1word ((peer
->shared_network
&&
369 peer_afi_active_nego (peer
, AFI_IP6
)),
373 * There are certain peers that must get their own update-group:
375 * - peers that negotiated ORF
377 if (CHECK_FLAG (peer
->flags
, PEER_FLAG_LONESOUL
) ||
378 CHECK_FLAG (peer
->af_cap
[afi
][safi
], PEER_CAP_ORF_PREFIX_SM_RCV
) ||
379 CHECK_FLAG (peer
->af_cap
[afi
][safi
], PEER_CAP_ORF_PREFIX_SM_OLD_RCV
))
380 key
= jhash_1word (jhash (peer
->host
, strlen (peer
->host
), SEED2
), key
);
386 updgrp_hash_cmp (const void *p1
, const void *p2
)
388 const struct update_group
*grp1
;
389 const struct update_group
*grp2
;
390 const struct peer
*pe1
;
391 const struct peer
*pe2
;
394 const struct bgp_filter
*fl1
;
395 const struct bgp_filter
*fl2
;
408 flags1
= pe1
->af_flags
[afi
][safi
];
409 flags2
= pe2
->af_flags
[afi
][safi
];
410 fl1
= &pe1
->filter
[afi
][safi
];
411 fl2
= &pe2
->filter
[afi
][safi
];
413 /* put EBGP and IBGP peers in different update groups */
414 if (pe1
->sort
!= pe2
->sort
)
417 /* check peer flags */
418 if ((pe1
->flags
& PEER_UPDGRP_FLAGS
) !=
419 (pe2
->flags
& PEER_UPDGRP_FLAGS
))
422 /* If there is 'local-as' configured, it should match. */
423 if (pe1
->change_local_as
!= pe2
->change_local_as
)
426 /* flags like route reflector client */
427 if ((flags1
& PEER_UPDGRP_AF_FLAGS
) != (flags2
& PEER_UPDGRP_AF_FLAGS
))
430 if ((pe1
->cap
& PEER_UPDGRP_CAP_FLAGS
) !=
431 (pe2
->cap
& PEER_UPDGRP_CAP_FLAGS
))
434 if ((pe1
->af_cap
[afi
][safi
] & PEER_UPDGRP_AF_CAP_FLAGS
) !=
435 (pe2
->af_cap
[afi
][safi
] & PEER_UPDGRP_AF_CAP_FLAGS
))
438 if (pe1
->v_routeadv
!= pe2
->v_routeadv
)
441 if (pe1
->group
!= pe2
->group
)
444 /* route-map names should be the same */
445 if ((fl1
->map
[RMAP_OUT
].name
&& !fl2
->map
[RMAP_OUT
].name
) ||
446 (!fl1
->map
[RMAP_OUT
].name
&& fl2
->map
[RMAP_OUT
].name
) ||
447 (fl1
->map
[RMAP_OUT
].name
&& fl2
->map
[RMAP_OUT
].name
&&
448 strcmp (fl1
->map
[RMAP_OUT
].name
, fl2
->map
[RMAP_OUT
].name
)))
451 if ((fl1
->dlist
[FILTER_OUT
].name
&& !fl2
->dlist
[FILTER_OUT
].name
) ||
452 (!fl1
->dlist
[FILTER_OUT
].name
&& fl2
->dlist
[FILTER_OUT
].name
) ||
453 (fl1
->dlist
[FILTER_OUT
].name
&& fl2
->dlist
[FILTER_OUT
].name
&&
454 strcmp (fl1
->dlist
[FILTER_OUT
].name
, fl2
->dlist
[FILTER_OUT
].name
)))
457 if ((fl1
->plist
[FILTER_OUT
].name
&& !fl2
->plist
[FILTER_OUT
].name
) ||
458 (!fl1
->plist
[FILTER_OUT
].name
&& fl2
->plist
[FILTER_OUT
].name
) ||
459 (fl1
->plist
[FILTER_OUT
].name
&& fl2
->plist
[FILTER_OUT
].name
&&
460 strcmp (fl1
->plist
[FILTER_OUT
].name
, fl2
->plist
[FILTER_OUT
].name
)))
463 if ((fl1
->aslist
[FILTER_OUT
].name
&& !fl2
->aslist
[FILTER_OUT
].name
) ||
464 (!fl1
->aslist
[FILTER_OUT
].name
&& fl2
->aslist
[FILTER_OUT
].name
) ||
465 (fl1
->aslist
[FILTER_OUT
].name
&& fl2
->aslist
[FILTER_OUT
].name
&&
466 strcmp (fl1
->aslist
[FILTER_OUT
].name
, fl2
->aslist
[FILTER_OUT
].name
)))
469 if ((fl1
->usmap
.name
&& !fl2
->usmap
.name
) ||
470 (!fl1
->usmap
.name
&& fl2
->usmap
.name
) ||
471 (fl1
->usmap
.name
&& fl2
->usmap
.name
&&
472 strcmp (fl1
->usmap
.name
, fl2
->usmap
.name
)))
475 if ((pe1
->default_rmap
[afi
][safi
].name
&&
476 !pe2
->default_rmap
[afi
][safi
].name
) ||
477 (!pe1
->default_rmap
[afi
][safi
].name
&&
478 pe2
->default_rmap
[afi
][safi
].name
) ||
479 (pe1
->default_rmap
[afi
][safi
].name
&&
480 pe2
->default_rmap
[afi
][safi
].name
&&
481 strcmp (pe1
->default_rmap
[afi
][safi
].name
,
482 pe2
->default_rmap
[afi
][safi
].name
)))
485 if ((afi
== AFI_IP6
) && (pe1
->shared_network
!= pe2
->shared_network
))
488 if ((CHECK_FLAG (pe1
->flags
, PEER_FLAG_LONESOUL
) ||
489 CHECK_FLAG (pe1
->af_cap
[afi
][safi
], PEER_CAP_ORF_PREFIX_SM_RCV
) ||
490 CHECK_FLAG (pe1
->af_cap
[afi
][safi
], PEER_CAP_ORF_PREFIX_SM_OLD_RCV
)) &&
491 !sockunion_same (&pe1
->su
, &pe2
->su
))
498 peer_lonesoul_or_not (struct peer
*peer
, int set
)
500 /* no change in status? */
501 if (set
== (CHECK_FLAG (peer
->flags
, PEER_FLAG_LONESOUL
) > 0))
505 SET_FLAG (peer
->flags
, PEER_FLAG_LONESOUL
);
507 UNSET_FLAG (peer
->flags
, PEER_FLAG_LONESOUL
);
509 update_group_adjust_peer_afs (peer
);
513 * subgroup_total_packets_enqueued
515 * Returns the total number of packets enqueued to a subgroup.
518 subgroup_total_packets_enqueued (struct update_subgroup
*subgrp
)
522 pkt
= bpacket_queue_last (SUBGRP_PKTQ (subgrp
));
528 update_group_show_walkcb (struct update_group
*updgrp
, void *arg
)
530 struct updwalk_context
*ctx
= arg
;
532 struct update_subgroup
*subgrp
;
534 struct bgp_filter
*filter
;
542 UPDGRP_FOREACH_SUBGRP (updgrp
, subgrp
)
544 if (ctx
->subgrp_id
&& (ctx
->subgrp_id
!= subgrp
->id
))
560 /* Since this routine is invoked from a walk, we cannot signal any */
561 /* error here, can only return. */
567 vty_outln (vty
, "Update-group %" PRIu64
":", updgrp
->id
);
568 vty_out (vty
, " Created: %s", timestamp_string (updgrp
->uptime
));
569 filter
= &updgrp
->conf
->filter
[updgrp
->afi
][updgrp
->safi
];
570 if (filter
->map
[RMAP_OUT
].name
)
571 vty_outln (vty
, " Outgoing route map: %s%s",
572 filter
->map
[RMAP_OUT
].map
? "X" : "",
573 filter
->map
[RMAP_OUT
].name
);
574 vty_outln (vty
, " MRAI value (seconds): %d",
575 updgrp
->conf
->v_routeadv
);
576 if (updgrp
->conf
->change_local_as
)
577 vty_outln (vty
, " Local AS %u%s%s",
578 updgrp
->conf
->change_local_as
,
579 CHECK_FLAG (updgrp
->conf
->flags
,
580 PEER_FLAG_LOCAL_AS_NO_PREPEND
) ? " no-prepend" : "",
581 CHECK_FLAG(updgrp
->conf
->flags
, PEER_FLAG_LOCAL_AS_REPLACE_AS
) ? " replace-as" : "");
583 UPDGRP_FOREACH_SUBGRP (updgrp
, subgrp
)
585 if (ctx
->subgrp_id
&& (ctx
->subgrp_id
!= subgrp
->id
))
587 vty_out (vty
, VTYNL
);
588 vty_outln (vty
, " Update-subgroup %" PRIu64
":", subgrp
->id
);
589 vty_out (vty
, " Created: %s", timestamp_string (subgrp
->uptime
));
591 if (subgrp
->split_from
.update_group_id
|| subgrp
->split_from
.subgroup_id
)
593 vty_outln (vty
, " Split from group id: %" PRIu64
"",
594 subgrp
->split_from
.update_group_id
);
595 vty_outln (vty
, " Split from subgroup id: %" PRIu64
"",
596 subgrp
->split_from
.subgroup_id
);
599 vty_outln (vty
, " Join events: %u", subgrp
->join_events
);
600 vty_outln (vty
, " Prune events: %u",
601 subgrp
->prune_events
);
602 vty_outln (vty
, " Merge events: %u",
603 subgrp
->merge_events
);
604 vty_outln (vty
, " Split events: %u",
605 subgrp
->split_events
);
606 vty_outln (vty
, " Update group switch events: %u",
607 subgrp
->updgrp_switch_events
);
608 vty_outln (vty
, " Peer refreshes combined: %u",
609 subgrp
->peer_refreshes_combined
);
610 vty_outln (vty
, " Merge checks triggered: %u",
611 subgrp
->merge_checks_triggered
);
612 vty_outln (vty
, " Version: %" PRIu64
"", subgrp
->version
);
613 vty_outln (vty
, " Packet queue length: %d",
614 bpacket_queue_length(SUBGRP_PKTQ(subgrp
)));
615 vty_outln (vty
, " Total packets enqueued: %u",
616 subgroup_total_packets_enqueued(subgrp
));
617 vty_outln (vty
, " Packet queue high watermark: %d",
618 bpacket_queue_hwm_length(SUBGRP_PKTQ(subgrp
)));
619 vty_outln (vty
, " Adj-out list count: %u",
621 vty_outln (vty
, " Advertise list: %s",
622 advertise_list_is_empty(subgrp
) ? "empty" : "not empty");
623 vty_outln (vty
, " Flags: %s",
624 CHECK_FLAG(subgrp
->flags
, SUBGRP_FLAG_NEEDS_REFRESH
) ? "R" : "");
625 if (subgrp
->peer_count
> 0)
627 vty_outln (vty
, " Peers:");
628 SUBGRP_FOREACH_PEER (subgrp
, paf
)
629 vty_outln (vty
, " - %s", paf
->peer
->host
);
632 return UPDWALK_CONTINUE
;
636 * Helper function to show the packet queue for each subgroup of update group.
637 * Will be constrained to a particular subgroup id if id !=0
640 updgrp_show_packet_queue_walkcb (struct update_group
*updgrp
, void *arg
)
642 struct updwalk_context
*ctx
= arg
;
643 struct update_subgroup
*subgrp
;
647 UPDGRP_FOREACH_SUBGRP (updgrp
, subgrp
)
649 if (ctx
->subgrp_id
&& (ctx
->subgrp_id
!= subgrp
->id
))
651 vty_outln (vty
, "update group %" PRIu64
", subgroup %" PRIu64
"", updgrp
->id
,
653 bpacket_queue_show_vty (SUBGRP_PKTQ (subgrp
), vty
);
655 return UPDWALK_CONTINUE
;
659 * Show the packet queue for each subgroup of update group. Will be
660 * constrained to a particular subgroup id if id !=0
663 update_group_show_packet_queue (struct bgp
*bgp
, afi_t afi
, safi_t safi
,
664 struct vty
*vty
, uint64_t id
)
666 struct updwalk_context ctx
;
668 memset (&ctx
, 0, sizeof (ctx
));
672 update_group_af_walk (bgp
, afi
, safi
, updgrp_show_packet_queue_walkcb
,
676 static struct update_group
*
677 update_group_find (struct peer_af
*paf
)
679 struct update_group
*updgrp
;
680 struct update_group tmp
;
681 struct peer tmp_conf
;
683 if (!peer_established (PAF_PEER (paf
)))
686 memset (&tmp
, 0, sizeof (tmp
));
687 memset (&tmp_conf
, 0, sizeof (tmp_conf
));
688 tmp
.conf
= &tmp_conf
;
689 peer2_updgrp_copy (&tmp
, paf
);
691 updgrp
= hash_lookup (paf
->peer
->bgp
->update_groups
[paf
->afid
], &tmp
);
692 conf_release (&tmp_conf
, paf
->afi
, paf
->safi
);
696 static struct update_group
*
697 update_group_create (struct peer_af
*paf
)
699 struct update_group
*updgrp
;
700 struct update_group tmp
;
701 struct peer tmp_conf
;
703 memset (&tmp
, 0, sizeof (tmp
));
704 memset (&tmp_conf
, 0, sizeof (tmp_conf
));
705 tmp
.conf
= &tmp_conf
;
706 peer2_updgrp_copy (&tmp
, paf
);
708 updgrp
= hash_get (paf
->peer
->bgp
->update_groups
[paf
->afid
], &tmp
,
712 update_group_checkin (updgrp
);
714 if (BGP_DEBUG (update_groups
, UPDATE_GROUPS
))
715 zlog_debug ("create update group %" PRIu64
, updgrp
->id
);
717 UPDGRP_GLOBAL_STAT (updgrp
, updgrps_created
) += 1;
719 conf_release(&tmp_conf
, paf
->afi
, paf
->safi
);
724 update_group_delete (struct update_group
*updgrp
)
726 if (BGP_DEBUG (update_groups
, UPDATE_GROUPS
))
727 zlog_debug ("delete update group %" PRIu64
, updgrp
->id
);
729 UPDGRP_GLOBAL_STAT (updgrp
, updgrps_deleted
) += 1;
731 hash_release (updgrp
->bgp
->update_groups
[updgrp
->afid
], updgrp
);
732 conf_release (updgrp
->conf
, updgrp
->afi
, updgrp
->safi
);
734 if (updgrp
->conf
->host
)
735 XFREE(MTYPE_BGP_PEER_HOST
, updgrp
->conf
->host
);
736 updgrp
->conf
->host
= NULL
;
738 if (updgrp
->conf
->ifname
)
739 XFREE(MTYPE_BGP_PEER_IFNAME
, updgrp
->conf
->ifname
);
741 XFREE (MTYPE_BGP_PEER
, updgrp
->conf
);
742 XFREE (MTYPE_BGP_UPDGRP
, updgrp
);
746 update_group_add_subgroup (struct update_group
*updgrp
,
747 struct update_subgroup
*subgrp
)
749 if (!updgrp
|| !subgrp
)
752 LIST_INSERT_HEAD (&(updgrp
->subgrps
), subgrp
, updgrp_train
);
753 subgrp
->update_group
= updgrp
;
757 update_group_remove_subgroup (struct update_group
*updgrp
,
758 struct update_subgroup
*subgrp
)
760 if (!updgrp
|| !subgrp
)
763 LIST_REMOVE (subgrp
, updgrp_train
);
764 subgrp
->update_group
= NULL
;
765 if (LIST_EMPTY (&(updgrp
->subgrps
)))
766 update_group_delete (updgrp
);
769 static struct update_subgroup
*
770 update_subgroup_create (struct update_group
*updgrp
)
772 struct update_subgroup
*subgrp
;
774 subgrp
= XCALLOC (MTYPE_BGP_UPD_SUBGRP
, sizeof (struct update_subgroup
));
775 update_subgroup_checkin (subgrp
, updgrp
);
776 subgrp
->v_coalesce
= (UPDGRP_INST (updgrp
))->coalesce_time
;
778 bpacket_queue_init (SUBGRP_PKTQ (subgrp
));
779 bpacket_queue_add (SUBGRP_PKTQ (subgrp
), NULL
, NULL
);
780 TAILQ_INIT (&(subgrp
->adjq
));
781 if (BGP_DEBUG (update_groups
, UPDATE_GROUPS
))
782 zlog_debug ("create subgroup u%" PRIu64
":s%" PRIu64
,
783 updgrp
->id
, subgrp
->id
);
785 update_group_add_subgroup (updgrp
, subgrp
);
787 UPDGRP_INCR_STAT (updgrp
, subgrps_created
);
793 update_subgroup_delete (struct update_subgroup
*subgrp
)
798 if (subgrp
->update_group
)
799 UPDGRP_INCR_STAT (subgrp
->update_group
, subgrps_deleted
);
801 if (subgrp
->t_merge_check
)
802 THREAD_OFF (subgrp
->t_merge_check
);
804 if (subgrp
->t_coalesce
)
805 THREAD_TIMER_OFF (subgrp
->t_coalesce
);
807 bpacket_queue_cleanup (SUBGRP_PKTQ (subgrp
));
808 subgroup_clear_table (subgrp
);
810 if (subgrp
->t_coalesce
)
811 THREAD_TIMER_OFF (subgrp
->t_coalesce
);
812 sync_delete (subgrp
);
814 if (BGP_DEBUG (update_groups
, UPDATE_GROUPS
))
815 zlog_debug ("delete subgroup u%" PRIu64
":s%" PRIu64
,
816 subgrp
->update_group
->id
, subgrp
->id
);
818 update_group_remove_subgroup (subgrp
->update_group
, subgrp
);
820 XFREE (MTYPE_BGP_UPD_SUBGRP
, subgrp
);
824 update_subgroup_inherit_info (struct update_subgroup
*to
,
825 struct update_subgroup
*from
)
830 to
->sflags
= from
->sflags
;
834 * update_subgroup_check_delete
836 * Delete a subgroup if it is ready to be deleted.
838 * Returns TRUE if the subgroup was deleted.
841 update_subgroup_check_delete (struct update_subgroup
*subgrp
)
846 if (!LIST_EMPTY (&(subgrp
->peers
)))
849 update_subgroup_delete (subgrp
);
855 * update_subgroup_add_peer
857 * @param send_enqueued_packets If true all currently enqueued packets will
858 * also be sent to the peer.
861 update_subgroup_add_peer (struct update_subgroup
*subgrp
, struct peer_af
*paf
,
862 int send_enqueued_pkts
)
869 LIST_INSERT_HEAD (&(subgrp
->peers
), paf
, subgrp_train
);
870 paf
->subgroup
= subgrp
;
871 subgrp
->peer_count
++;
873 if (bgp_debug_peer_updout_enabled(paf
->peer
->host
))
875 UPDGRP_PEER_DBG_EN(subgrp
->update_group
);
878 SUBGRP_INCR_STAT (subgrp
, join_events
);
880 if (send_enqueued_pkts
)
882 pkt
= bpacket_queue_first (SUBGRP_PKTQ (subgrp
));
888 * Hang the peer off of the last, placeholder, packet in the
889 * queue. This means it won't see any of the packets that are
890 * currently the queue.
892 pkt
= bpacket_queue_last (SUBGRP_PKTQ (subgrp
));
893 assert (pkt
->buffer
== NULL
);
896 bpacket_add_peer (pkt
, paf
);
898 bpacket_queue_sanity_check (SUBGRP_PKTQ (subgrp
));
902 * update_subgroup_remove_peer_internal
904 * Internal function that removes a peer from a subgroup, but does not
905 * delete the subgroup. A call to this function must almost always be
906 * followed by a call to update_subgroup_check_delete().
908 * @see update_subgroup_remove_peer
911 update_subgroup_remove_peer_internal (struct update_subgroup
*subgrp
,
914 assert (subgrp
&& paf
);
916 if (bgp_debug_peer_updout_enabled(paf
->peer
->host
))
918 UPDGRP_PEER_DBG_DIS(subgrp
->update_group
);
921 bpacket_queue_remove_peer (paf
);
922 LIST_REMOVE (paf
, subgrp_train
);
923 paf
->subgroup
= NULL
;
924 subgrp
->peer_count
--;
926 SUBGRP_INCR_STAT (subgrp
, prune_events
);
930 * update_subgroup_remove_peer
933 update_subgroup_remove_peer (struct update_subgroup
*subgrp
,
939 update_subgroup_remove_peer_internal (subgrp
, paf
);
941 if (update_subgroup_check_delete (subgrp
))
945 * The deletion of the peer may have caused some packets to be
946 * deleted from the subgroup packet queue. Check if the subgroup can
949 update_subgroup_check_merge (subgrp
, "removed peer from subgroup");
952 static struct update_subgroup
*
953 update_subgroup_find (struct update_group
*updgrp
, struct peer_af
*paf
)
955 struct update_subgroup
*subgrp
= NULL
;
966 if (!peer_established (PAF_PEER (paf
)))
969 UPDGRP_FOREACH_SUBGRP (updgrp
, subgrp
)
971 if (subgrp
->version
!= version
||
972 CHECK_FLAG(subgrp
->sflags
, SUBGRP_STATUS_DEFAULT_ORIGINATE
))
976 * The version number is not meaningful on a subgroup that needs
979 if (update_subgroup_needs_refresh (subgrp
))
989 * update_subgroup_ready_for_merge
991 * Returns TRUE if this subgroup is in a state that allows it to be
992 * merged into another subgroup.
995 update_subgroup_ready_for_merge (struct update_subgroup
*subgrp
)
999 * Not ready if there are any encoded packets waiting to be written
1002 if (!bpacket_queue_is_empty (SUBGRP_PKTQ (subgrp
)))
1006 * Not ready if there enqueued updates waiting to be encoded.
1008 if (!advertise_list_is_empty (subgrp
))
1012 * Don't attempt to merge a subgroup that needs a refresh. For one,
1013 * we can't determine if the adj_out of such a group matches that of
1016 if (update_subgroup_needs_refresh (subgrp
))
1023 * update_subgrp_can_merge_into
1025 * Returns TRUE if the first subgroup can merge into the second
1029 update_subgroup_can_merge_into (struct update_subgroup
*subgrp
,
1030 struct update_subgroup
*target
)
1033 if (subgrp
== target
)
1037 * Both must have processed the BRIB to the same point in order to
1040 if (subgrp
->version
!= target
->version
)
1043 if (CHECK_FLAG(subgrp
->sflags
, SUBGRP_STATUS_DEFAULT_ORIGINATE
) !=
1044 CHECK_FLAG(target
->sflags
, SUBGRP_STATUS_DEFAULT_ORIGINATE
))
1047 if (subgrp
->adj_count
!= target
->adj_count
)
1050 return update_subgroup_ready_for_merge (target
);
1054 * update_subgroup_merge
1056 * Merge the first subgroup into the second one.
1059 update_subgroup_merge (struct update_subgroup
*subgrp
,
1060 struct update_subgroup
*target
, const char *reason
)
1062 struct peer_af
*paf
;
1066 assert (subgrp
->adj_count
== target
->adj_count
);
1068 peer_count
= subgrp
->peer_count
;
1072 paf
= LIST_FIRST (&subgrp
->peers
);
1076 update_subgroup_remove_peer_internal (subgrp
, paf
);
1079 * Add the peer to the target subgroup, while making sure that
1080 * any currently enqueued packets won't be sent to it. Enqueued
1081 * packets could, for example, result in an unnecessary withdraw
1082 * followed by an advertise.
1084 update_subgroup_add_peer (target
, paf
, 0);
1087 SUBGRP_INCR_STAT (target
, merge_events
);
1089 if (BGP_DEBUG (update_groups
, UPDATE_GROUPS
))
1090 zlog_debug ("u%" PRIu64
":s%" PRIu64
" (%d peers) merged into u%" PRIu64
":s%" PRIu64
", "
1091 "trigger: %s", subgrp
->update_group
->id
, subgrp
->id
, peer_count
,
1092 target
->update_group
->id
, target
->id
, reason
? reason
: "unknown");
1094 result
= update_subgroup_check_delete (subgrp
);
1099 * update_subgroup_check_merge
1101 * Merge this subgroup into another subgroup if possible.
1103 * Returns TRUE if the subgroup has been merged. The subgroup pointer
1104 * should not be accessed in this case.
1107 update_subgroup_check_merge (struct update_subgroup
*subgrp
,
1110 struct update_subgroup
*target
;
1112 if (!update_subgroup_ready_for_merge (subgrp
))
1116 * Look for a subgroup to merge into.
1118 UPDGRP_FOREACH_SUBGRP (subgrp
->update_group
, target
)
1120 if (update_subgroup_can_merge_into (subgrp
, target
))
1127 update_subgroup_merge (subgrp
, target
, reason
);
1132 * update_subgroup_merge_check_thread_cb
1135 update_subgroup_merge_check_thread_cb (struct thread
*thread
)
1137 struct update_subgroup
*subgrp
;
1139 subgrp
= THREAD_ARG (thread
);
1141 subgrp
->t_merge_check
= NULL
;
1143 update_subgroup_check_merge (subgrp
, "triggered merge check");
1148 * update_subgroup_trigger_merge_check
1150 * Triggers a call to update_subgroup_check_merge() on a clean context.
1152 * @param force If true, the merge check will be triggered even if the
1153 * subgroup doesn't currently look ready for a merge.
1155 * Returns TRUE if a merge check will be performed shortly.
1158 update_subgroup_trigger_merge_check (struct update_subgroup
*subgrp
,
1161 if (subgrp
->t_merge_check
)
1164 if (!force
&& !update_subgroup_ready_for_merge (subgrp
))
1167 subgrp
->t_merge_check
= NULL
;
1168 thread_add_timer_msec (bm
->master
, update_subgroup_merge_check_thread_cb
, subgrp
,
1169 0, &subgrp
->t_merge_check
);
1171 SUBGRP_INCR_STAT (subgrp
, merge_checks_triggered
);
1177 * update_subgroup_copy_adj_out
1179 * Helper function that clones the adj out (state about advertised
1180 * routes) from one subgroup to another. It assumes that the adj out
1181 * of the target subgroup is empty.
1184 update_subgroup_copy_adj_out (struct update_subgroup
*source
,
1185 struct update_subgroup
*dest
)
1187 struct bgp_adj_out
*aout
, *aout_copy
;
1189 SUBGRP_FOREACH_ADJ (source
, aout
)
1194 aout_copy
= bgp_adj_out_alloc (dest
, aout
->rn
, aout
->addpath_tx_id
);
1195 aout_copy
->attr
= aout
->attr
? bgp_attr_refcount (aout
->attr
) : NULL
;
1200 * update_subgroup_copy_packets
1202 * Copy packets after and including the given packet to the subgroup
1205 * Returns the number of packets copied.
1208 update_subgroup_copy_packets (struct update_subgroup
*dest
,
1209 struct bpacket
*pkt
)
1214 while (pkt
&& pkt
->buffer
)
1216 bpacket_queue_add (SUBGRP_PKTQ (dest
), stream_dup (pkt
->buffer
),
1219 pkt
= bpacket_next (pkt
);
1222 bpacket_queue_sanity_check (SUBGRP_PKTQ (dest
));
1228 updgrp_prefix_list_update (struct update_group
*updgrp
, const char *name
)
1231 struct bgp_filter
*filter
;
1233 peer
= UPDGRP_PEER (updgrp
);
1234 filter
= &peer
->filter
[UPDGRP_AFI(updgrp
)][UPDGRP_SAFI(updgrp
)];
1236 if (PREFIX_LIST_OUT_NAME(filter
) &&
1237 (strcmp (name
, PREFIX_LIST_OUT_NAME(filter
)) == 0))
1239 PREFIX_LIST_OUT(filter
) =
1240 prefix_list_lookup (UPDGRP_AFI(updgrp
), PREFIX_LIST_OUT_NAME(filter
));
1247 updgrp_filter_list_update (struct update_group
*updgrp
, const char *name
)
1250 struct bgp_filter
*filter
;
1252 peer
= UPDGRP_PEER (updgrp
);
1253 filter
= &peer
->filter
[UPDGRP_AFI(updgrp
)][UPDGRP_SAFI(updgrp
)];
1255 if (FILTER_LIST_OUT_NAME(filter
) &&
1256 (strcmp (name
, FILTER_LIST_OUT_NAME(filter
)) == 0))
1258 FILTER_LIST_OUT(filter
) = as_list_lookup (FILTER_LIST_OUT_NAME(filter
));
1265 updgrp_distribute_list_update (struct update_group
*updgrp
, const char *name
)
1268 struct bgp_filter
*filter
;
1270 peer
= UPDGRP_PEER(updgrp
);
1271 filter
= &peer
->filter
[UPDGRP_AFI(updgrp
)][UPDGRP_SAFI(updgrp
)];
1273 if (DISTRIBUTE_OUT_NAME(filter
) &&
1274 (strcmp (name
, DISTRIBUTE_OUT_NAME(filter
)) == 0))
1276 DISTRIBUTE_OUT(filter
) = access_list_lookup(UPDGRP_AFI(updgrp
),
1277 DISTRIBUTE_OUT_NAME(filter
));
1284 updgrp_route_map_update (struct update_group
*updgrp
, const char *name
,
1285 int *def_rmap_changed
)
1288 struct bgp_filter
*filter
;
1293 peer
= UPDGRP_PEER (updgrp
);
1294 afi
= UPDGRP_AFI (updgrp
);
1295 safi
= UPDGRP_SAFI (updgrp
);
1296 filter
= &peer
->filter
[afi
][safi
];
1298 if (ROUTE_MAP_OUT_NAME(filter
) &&
1299 (strcmp (name
, ROUTE_MAP_OUT_NAME(filter
)) == 0))
1301 ROUTE_MAP_OUT(filter
) = route_map_lookup_by_name (name
);
1306 if (UNSUPPRESS_MAP_NAME(filter
) &&
1307 (strcmp (name
, UNSUPPRESS_MAP_NAME(filter
)) == 0))
1309 UNSUPPRESS_MAP(filter
) = route_map_lookup_by_name (name
);
1313 /* process default-originate route-map */
1314 if (peer
->default_rmap
[afi
][safi
].name
&&
1315 (strcmp (name
, peer
->default_rmap
[afi
][safi
].name
) == 0))
1317 peer
->default_rmap
[afi
][safi
].map
= route_map_lookup_by_name (name
);
1318 if (def_rmap_changed
)
1319 *def_rmap_changed
= 1;
1325 * hash iteration callback function to process a policy change for an
1326 * update group. Check if the changed policy matches the updgrp's
1327 * outbound route-map or unsuppress-map or default-originate map or
1328 * filter-list or prefix-list or distribute-list.
1329 * Trigger update generation accordingly.
1332 updgrp_policy_update_walkcb (struct update_group
*updgrp
, void *arg
)
1334 struct updwalk_context
*ctx
= arg
;
1335 struct update_subgroup
*subgrp
;
1337 int def_changed
= 0;
1339 if (!updgrp
|| !ctx
|| !ctx
->policy_name
)
1340 return UPDWALK_CONTINUE
;
1342 switch (ctx
->policy_type
) {
1343 case BGP_POLICY_ROUTE_MAP
:
1344 changed
= updgrp_route_map_update(updgrp
, ctx
->policy_name
, &def_changed
);
1346 case BGP_POLICY_FILTER_LIST
:
1347 changed
= updgrp_filter_list_update(updgrp
, ctx
->policy_name
);
1349 case BGP_POLICY_PREFIX_LIST
:
1350 changed
= updgrp_prefix_list_update(updgrp
, ctx
->policy_name
);
1352 case BGP_POLICY_DISTRIBUTE_LIST
:
1353 changed
= updgrp_distribute_list_update(updgrp
, ctx
->policy_name
);
1359 /* If not doing route update, return after updating "config" */
1360 if (!ctx
->policy_route_update
)
1361 return UPDWALK_CONTINUE
;
1363 /* If nothing has changed, return after updating "config" */
1364 if (!changed
&& !def_changed
)
1365 return UPDWALK_CONTINUE
;
1368 * If something has changed, at the beginning of a route-map modification
1369 * event, mark each subgroup's needs-refresh bit. For one, it signals to
1370 * whoever that the subgroup needs a refresh. Second, it prevents premature
1371 * merge of this subgroup with another before a complete (outbound) refresh.
1373 if (ctx
->policy_event_start_flag
)
1375 UPDGRP_FOREACH_SUBGRP(updgrp
, subgrp
)
1377 update_subgroup_set_needs_refresh(subgrp
, 1);
1379 return UPDWALK_CONTINUE
;
1382 UPDGRP_FOREACH_SUBGRP (updgrp
, subgrp
)
1386 if (bgp_debug_update(NULL
, NULL
, updgrp
, 0))
1387 zlog_debug ("u%" PRIu64
":s%" PRIu64
" announcing routes upon policy %s (type %d) change",
1388 updgrp
->id
, subgrp
->id
, ctx
->policy_name
, ctx
->policy_type
);
1389 subgroup_announce_route (subgrp
);
1393 if (bgp_debug_update(NULL
, NULL
, updgrp
, 0))
1394 zlog_debug ("u%" PRIu64
":s%" PRIu64
" announcing default upon default routemap %s change",
1395 updgrp
->id
, subgrp
->id
, ctx
->policy_name
);
1396 subgroup_default_originate (subgrp
, 0);
1398 update_subgroup_set_needs_refresh(subgrp
, 0);
1400 return UPDWALK_CONTINUE
;
1404 update_group_walkcb (struct hash_backet
*backet
, void *arg
)
1406 struct update_group
*updgrp
= backet
->data
;
1407 struct updwalk_context
*wctx
= arg
;
1408 int ret
= (*wctx
->cb
) (updgrp
, wctx
->context
);
1413 update_group_periodic_merge_walkcb (struct update_group
*updgrp
, void *arg
)
1415 struct update_subgroup
*subgrp
;
1416 struct update_subgroup
*tmp_subgrp
;
1417 const char *reason
= arg
;
1419 UPDGRP_FOREACH_SUBGRP_SAFE (updgrp
, subgrp
, tmp_subgrp
)
1420 update_subgroup_check_merge (subgrp
, reason
);
1421 return UPDWALK_CONTINUE
;
1424 /********************
1426 ********************/
1429 * trigger function when a policy (route-map/filter-list/prefix-list/
1430 * distribute-list etc.) content changes. Go through all the
1431 * update groups and process the change.
1433 * bgp: the bgp instance
1434 * ptype: the type of policy that got modified, see bgpd.h
1435 * pname: name of the policy
1436 * route_update: flag to control if an automatic update generation should
1438 * start_event: flag that indicates if it's the beginning of the change.
1439 * Esp. when the user is changing the content interactively
1440 * over multiple statements. Useful to set dirty flag on
1444 update_group_policy_update (struct bgp
*bgp
, bgp_policy_type_e ptype
,
1445 const char *pname
, int route_update
, int start_event
)
1447 struct updwalk_context ctx
;
1449 memset (&ctx
, 0, sizeof (ctx
));
1450 ctx
.policy_type
= ptype
;
1451 ctx
.policy_name
= pname
;
1452 ctx
.policy_route_update
= route_update
;
1453 ctx
.policy_event_start_flag
= start_event
;
1456 update_group_walk (bgp
, updgrp_policy_update_walkcb
, &ctx
);
1460 * update_subgroup_split_peer
1462 * Ensure that the given peer is in a subgroup of its own in the
1463 * specified update group.
1466 update_subgroup_split_peer (struct peer_af
*paf
, struct update_group
*updgrp
)
1468 struct update_subgroup
*old_subgrp
, *subgrp
;
1472 old_subgrp
= paf
->subgroup
;
1475 updgrp
= old_subgrp
->update_group
;
1478 * If the peer is alone in its subgroup, reuse the existing
1481 if (old_subgrp
->peer_count
== 1)
1483 if (updgrp
== old_subgrp
->update_group
)
1486 subgrp
= old_subgrp
;
1487 old_id
= old_subgrp
->update_group
->id
;
1489 if (bgp_debug_peer_updout_enabled(paf
->peer
->host
))
1491 UPDGRP_PEER_DBG_DIS(old_subgrp
->update_group
);
1494 update_group_remove_subgroup (old_subgrp
->update_group
, old_subgrp
);
1495 update_group_add_subgroup (updgrp
, subgrp
);
1497 if (bgp_debug_peer_updout_enabled(paf
->peer
->host
))
1499 UPDGRP_PEER_DBG_EN(updgrp
);
1501 if (BGP_DEBUG (update_groups
, UPDATE_GROUPS
))
1502 zlog_debug ("u%" PRIu64
":s%" PRIu64
" peer %s moved to u%" PRIu64
":s%" PRIu64
,
1503 old_id
, subgrp
->id
, paf
->peer
->host
, updgrp
->id
, subgrp
->id
);
1506 * The state of the subgroup (adj_out, advs, packet queue etc)
1507 * is consistent internally, but may not be identical to other
1508 * subgroups in the new update group even if the version number
1509 * matches up. Make sure a full refresh is done before the
1510 * subgroup is merged with another.
1512 update_subgroup_set_needs_refresh (subgrp
, 1);
1514 SUBGRP_INCR_STAT (subgrp
, updgrp_switch_events
);
1519 * Create a new subgroup under the specified update group, and copy
1520 * over relevant state to it.
1522 subgrp
= update_subgroup_create (updgrp
);
1523 update_subgroup_inherit_info (subgrp
, old_subgrp
);
1525 subgrp
->split_from
.update_group_id
= old_subgrp
->update_group
->id
;
1526 subgrp
->split_from
.subgroup_id
= old_subgrp
->id
;
1529 * Copy out relevant state from the old subgroup.
1531 update_subgroup_copy_adj_out (paf
->subgroup
, subgrp
);
1532 update_subgroup_copy_packets (subgrp
, paf
->next_pkt_to_send
);
1534 if (BGP_DEBUG (update_groups
, UPDATE_GROUPS
))
1535 zlog_debug ("u%" PRIu64
":s%" PRIu64
" peer %s split and moved into u%" PRIu64
":s%" PRIu64
,
1536 paf
->subgroup
->update_group
->id
, paf
->subgroup
->id
,
1537 paf
->peer
->host
, updgrp
->id
, subgrp
->id
);
1539 SUBGRP_INCR_STAT (paf
->subgroup
, split_events
);
1542 * Since queued advs were left behind, this new subgroup needs a
1545 update_subgroup_set_needs_refresh (subgrp
, 1);
1548 * Remove peer from old subgroup, and add it to the new one.
1550 update_subgroup_remove_peer (paf
->subgroup
, paf
);
1552 update_subgroup_add_peer (subgrp
, paf
, 1);
1556 update_bgp_group_init (struct bgp
*bgp
)
1561 bgp
->update_groups
[afid
] = hash_create (updgrp_hash_key_make
,
1566 update_bgp_group_free (struct bgp
*bgp
)
1572 if (bgp
->update_groups
[afid
])
1574 hash_free(bgp
->update_groups
[afid
]);
1575 bgp
->update_groups
[afid
] = NULL
;
1581 update_group_show (struct bgp
*bgp
, afi_t afi
, safi_t safi
, struct vty
*vty
,
1584 struct updwalk_context ctx
;
1585 memset (&ctx
, 0, sizeof (ctx
));
1587 ctx
.subgrp_id
= subgrp_id
;
1589 update_group_af_walk (bgp
, afi
, safi
, update_group_show_walkcb
, &ctx
);
1593 * update_group_show_stats
1595 * Show global statistics about update groups.
1598 update_group_show_stats (struct bgp
*bgp
, struct vty
*vty
)
1600 vty_outln (vty
, "Update groups created: %u",
1601 bgp
->update_group_stats
.updgrps_created
);
1602 vty_outln (vty
, "Update groups deleted: %u",
1603 bgp
->update_group_stats
.updgrps_deleted
);
1604 vty_outln (vty
, "Update subgroups created: %u",
1605 bgp
->update_group_stats
.subgrps_created
);
1606 vty_outln (vty
, "Update subgroups deleted: %u",
1607 bgp
->update_group_stats
.subgrps_deleted
);
1608 vty_outln (vty
, "Join events: %u",
1609 bgp
->update_group_stats
.join_events
);
1610 vty_outln (vty
, "Prune events: %u",
1611 bgp
->update_group_stats
.prune_events
);
1612 vty_outln (vty
, "Merge events: %u",
1613 bgp
->update_group_stats
.merge_events
);
1614 vty_outln (vty
, "Split events: %u",
1615 bgp
->update_group_stats
.split_events
);
1616 vty_outln (vty
, "Update group switch events: %u",
1617 bgp
->update_group_stats
.updgrp_switch_events
);
1618 vty_outln (vty
, "Peer route refreshes combined: %u",
1619 bgp
->update_group_stats
.peer_refreshes_combined
);
1620 vty_outln (vty
, "Merge checks triggered: %u",
1621 bgp
->update_group_stats
.merge_checks_triggered
);
1625 * update_group_adjust_peer
1628 update_group_adjust_peer (struct peer_af
*paf
)
1630 struct update_group
*updgrp
;
1631 struct update_subgroup
*subgrp
, *old_subgrp
;
1637 peer
= PAF_PEER (paf
);
1638 if (!peer_established (peer
))
1643 if (!CHECK_FLAG (peer
->flags
, PEER_FLAG_CONFIG_NODE
))
1648 if (!peer
->afc_nego
[paf
->afi
][paf
->safi
])
1653 updgrp
= update_group_find (paf
);
1656 updgrp
= update_group_create (paf
);
1659 zlog_err ("couldn't create update group for peer %s",
1665 old_subgrp
= paf
->subgroup
;
1671 * If the update group of the peer is unchanged, the peer can stay
1672 * in its existing subgroup and we're done.
1674 if (old_subgrp
->update_group
== updgrp
)
1678 * The peer is switching between update groups. Put it in its
1679 * own subgroup under the new update group.
1681 update_subgroup_split_peer (paf
, updgrp
);
1685 subgrp
= update_subgroup_find (updgrp
, paf
);
1688 subgrp
= update_subgroup_create (updgrp
);
1693 update_subgroup_add_peer (subgrp
, paf
, 1);
1694 if (BGP_DEBUG (update_groups
, UPDATE_GROUPS
))
1695 zlog_debug ("u%" PRIu64
":s%" PRIu64
" add peer %s",
1696 updgrp
->id
, subgrp
->id
, paf
->peer
->host
);
1702 update_group_adjust_soloness (struct peer
*peer
, int set
)
1704 struct peer_group
*group
;
1705 struct listnode
*node
, *nnode
;
1707 if (!CHECK_FLAG (peer
->sflags
, PEER_STATUS_GROUP
))
1709 peer_lonesoul_or_not (peer
, set
);
1710 if (peer
->status
== Established
)
1711 bgp_announce_route_all (peer
);
1715 group
= peer
->group
;
1716 for (ALL_LIST_ELEMENTS (group
->peer
, node
, nnode
, peer
))
1718 peer_lonesoul_or_not (peer
, set
);
1719 if (peer
->status
== Established
)
1720 bgp_announce_route_all (peer
);
1727 * update_subgroup_rib
1730 update_subgroup_rib (struct update_subgroup
*subgrp
)
1734 bgp
= SUBGRP_INST (subgrp
);
1738 return bgp
->rib
[SUBGRP_AFI (subgrp
)][SUBGRP_SAFI (subgrp
)];
1742 update_group_af_walk (struct bgp
*bgp
, afi_t afi
, safi_t safi
,
1743 updgrp_walkcb cb
, void *ctx
)
1745 struct updwalk_context wctx
;
1750 afid
= afindex (afi
, safi
);
1751 if (afid
>= BGP_AF_MAX
)
1754 memset (&wctx
, 0, sizeof (wctx
));
1758 if (bgp
->update_groups
[afid
])
1759 hash_walk (bgp
->update_groups
[afid
], update_group_walkcb
, &wctx
);
1763 update_group_walk (struct bgp
*bgp
, updgrp_walkcb cb
, void *ctx
)
1768 FOREACH_AFI_SAFI (afi
, safi
)
1770 update_group_af_walk (bgp
, afi
, safi
, cb
, ctx
);
1775 update_group_periodic_merge (struct bgp
*bgp
)
1777 char reason
[] = "periodic merge check";
1779 update_group_walk (bgp
, update_group_periodic_merge_walkcb
,
1784 update_group_default_originate_route_map_walkcb(struct update_group
*updgrp
,
1787 struct update_subgroup
*subgrp
;
1792 UPDGRP_FOREACH_SUBGRP (updgrp
, subgrp
)
1794 peer
= SUBGRP_PEER (subgrp
);
1795 afi
= SUBGRP_AFI (subgrp
);
1796 safi
= SUBGRP_SAFI (subgrp
);
1798 if (peer
->default_rmap
[afi
][safi
].name
)
1800 subgroup_default_originate (subgrp
, 0);
1804 return UPDWALK_CONTINUE
;
1808 update_group_refresh_default_originate_route_map (struct thread
*thread
)
1811 char reason
[] = "refresh default-originate route-map";
1813 bgp
= THREAD_ARG(thread
);
1814 update_group_walk (bgp
, update_group_default_originate_route_map_walkcb
,
1816 THREAD_TIMER_OFF (bgp
->t_rmap_def_originate_eval
);
1823 * peer_af_announce_route
1825 * Refreshes routes out to a peer_af immediately.
1827 * If the combine parameter is TRUE, then this function will try to
1828 * gather other peers in the subgroup for which a route announcement
1829 * is pending and efficently announce routes to all of them.
1831 * For now, the 'combine' option has an effect only if all peers in
1832 * the subgroup have a route announcement pending.
1835 peer_af_announce_route (struct peer_af
*paf
, int combine
)
1837 struct update_subgroup
*subgrp
;
1838 struct peer_af
*cur_paf
;
1841 subgrp
= paf
->subgroup
;
1847 * If there are other peers in the old subgroup that also need
1848 * routes to be announced, pull them into the peer's new
1850 * Combine route announcement with other peers if possible.
1852 * For now, we combine only if all peers in the subgroup have an
1853 * announcement pending.
1857 SUBGRP_FOREACH_PEER (subgrp
, cur_paf
)
1862 if (cur_paf
->t_announce_route
)
1870 * Announce to the peer alone if we were not asked to combine peers,
1871 * or if some peers don't have a route annoucement pending.
1873 if (!combine
|| !all_pending
)
1875 update_subgroup_split_peer (paf
, NULL
);
1879 if (bgp_debug_update(paf
->peer
, NULL
, subgrp
->update_group
, 0))
1880 zlog_debug ("u%" PRIu64
":s%" PRIu64
" %s announcing routes",
1881 subgrp
->update_group
->id
, subgrp
->id
, paf
->peer
->host
);
1883 subgroup_announce_route (paf
->subgroup
);
1888 * We will announce routes the entire subgroup.
1890 * First stop refresh timers on all the other peers.
1892 SUBGRP_FOREACH_PEER (subgrp
, cur_paf
)
1897 bgp_stop_announce_route_timer (cur_paf
);
1900 if (bgp_debug_update(paf
->peer
, NULL
, subgrp
->update_group
, 0))
1901 zlog_debug ("u%" PRIu64
":s%" PRIu64
" announcing routes to %s, combined into %d peers",
1902 subgrp
->update_group
->id
, subgrp
->id
,
1903 paf
->peer
->host
, subgrp
->peer_count
);
1905 subgroup_announce_route (subgrp
);
1907 SUBGRP_INCR_STAT_BY (subgrp
, peer_refreshes_combined
,
1908 subgrp
->peer_count
- 1);
1912 subgroup_trigger_write (struct update_subgroup
*subgrp
)
1914 struct peer_af
*paf
;
1917 if (bgp_debug_update(NULL
, NULL
, subgrp
->update_group
, 0))
1918 zlog_debug("u%llu:s%llu scheduling write thread for peers",
1919 subgrp
->update_group
->id
, subgrp
->id
);
1921 SUBGRP_FOREACH_PEER (subgrp
, paf
)
1923 if (paf
->peer
->status
== Established
)
1925 BGP_PEER_WRITE_ON (paf
->peer
->t_write
, bgp_write
, paf
->peer
->fd
,
1932 update_group_clear_update_dbg (struct update_group
*updgrp
, void *arg
)
1934 UPDGRP_PEER_DBG_OFF(updgrp
);
1935 return UPDWALK_CONTINUE
;
1938 /* Return true if we should addpath encode NLRI to this peer */
1940 bgp_addpath_encode_tx (struct peer
*peer
, afi_t afi
, safi_t safi
)
1942 return (CHECK_FLAG (peer
->af_cap
[afi
][safi
], PEER_CAP_ADDPATH_AF_TX_ADV
) &&
1943 CHECK_FLAG (peer
->af_cap
[afi
][safi
], PEER_CAP_ADDPATH_AF_RX_RCV
));
1947 * Return true if this is a path we should advertise due to a
1948 * configured addpath-tx knob
1951 bgp_addpath_tx_path (struct peer
*peer
, afi_t afi
, safi_t safi
,
1952 struct bgp_info
*ri
)
1954 if (CHECK_FLAG (peer
->af_flags
[afi
][safi
], PEER_FLAG_ADDPATH_TX_ALL_PATHS
))
1957 if (CHECK_FLAG (peer
->af_flags
[afi
][safi
], PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS
) &&
1958 CHECK_FLAG (ri
->flags
, BGP_INFO_DMED_SELECTED
))