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_addpath.h"
53 #include "bgpd/bgp_advertise.h"
54 #include "bgpd/bgp_packet.h"
55 #include "bgpd/bgp_updgrp.h"
56 #include "bgpd/bgp_route.h"
57 #include "bgpd/bgp_filter.h"
58 #include "bgpd/bgp_io.h"
65 * assign a unique ID to update group and subgroup. Mostly for display/
66 * debugging purposes. It's a 64-bit space - used leisurely without a
67 * worry about its wrapping and about filling gaps. While at it, timestamp
70 static void update_group_checkin(struct update_group
*updgrp
)
72 updgrp
->id
= ++bm
->updgrp_idspace
;
73 updgrp
->uptime
= bgp_clock();
76 static void update_subgroup_checkin(struct update_subgroup
*subgrp
,
77 struct update_group
*updgrp
)
79 subgrp
->id
= ++bm
->subgrp_idspace
;
80 subgrp
->uptime
= bgp_clock();
83 static void sync_init(struct update_subgroup
*subgrp
,
84 struct update_group
*updgrp
)
86 struct peer
*peer
= UPDGRP_PEER(updgrp
);
89 XCALLOC(MTYPE_BGP_SYNCHRONISE
, sizeof(struct bgp_synchronize
));
90 bgp_adv_fifo_init(&subgrp
->sync
->update
);
91 bgp_adv_fifo_init(&subgrp
->sync
->withdraw
);
92 bgp_adv_fifo_init(&subgrp
->sync
->withdraw_low
);
94 hash_create(baa_hash_key
, baa_hash_cmp
, "BGP SubGroup Hash");
96 /* We use a larger buffer for subgrp->work in the event that:
97 * - We RX a BGP_UPDATE where the attributes alone are just
98 * under 4096 or 65535 (if Extended Message capability negotiated).
99 * - The user configures an outbound route-map that does many as-path
100 * prepends or adds many communities. At most they can have
102 * args in a route-map so there is a finite limit on how large they
104 * make the attributes.
106 * Having a buffer with BGP_MAX_PACKET_SIZE_OVERFLOW allows us to avoid
108 * checking for every single attribute as we construct an UPDATE.
110 subgrp
->work
= stream_new(peer
->max_packet_size
111 + BGP_MAX_PACKET_SIZE_OVERFLOW
);
112 subgrp
->scratch
= stream_new(peer
->max_packet_size
);
115 static void sync_delete(struct update_subgroup
*subgrp
)
117 XFREE(MTYPE_BGP_SYNCHRONISE
, subgrp
->sync
);
119 hash_free(subgrp
->hash
);
122 stream_free(subgrp
->work
);
125 stream_free(subgrp
->scratch
);
126 subgrp
->scratch
= NULL
;
132 * copy only those fields that are relevant to update group match
134 static void conf_copy(struct peer
*dst
, struct peer
*src
, afi_t afi
,
137 struct bgp_filter
*srcfilter
;
138 struct bgp_filter
*dstfilter
;
140 srcfilter
= &src
->filter
[afi
][safi
];
141 dstfilter
= &dst
->filter
[afi
][safi
];
144 dst
->sort
= src
->sort
;
146 dst
->v_routeadv
= src
->v_routeadv
;
147 dst
->flags
= src
->flags
;
148 dst
->af_flags
[afi
][safi
] = src
->af_flags
[afi
][safi
];
149 dst
->pmax_out
[afi
][safi
] = src
->pmax_out
[afi
][safi
];
150 dst
->max_packet_size
= src
->max_packet_size
;
151 XFREE(MTYPE_BGP_PEER_HOST
, dst
->host
);
153 dst
->host
= XSTRDUP(MTYPE_BGP_PEER_HOST
, src
->host
);
155 dst
->af_cap
[afi
][safi
] = src
->af_cap
[afi
][safi
];
156 dst
->afc_nego
[afi
][safi
] = src
->afc_nego
[afi
][safi
];
157 dst
->orf_plist
[afi
][safi
] = src
->orf_plist
[afi
][safi
];
158 dst
->addpath_type
[afi
][safi
] = src
->addpath_type
[afi
][safi
];
159 dst
->local_as
= src
->local_as
;
160 dst
->change_local_as
= src
->change_local_as
;
161 dst
->shared_network
= src
->shared_network
;
162 memcpy(&(dst
->nexthop
), &(src
->nexthop
), sizeof(struct bgp_nexthop
));
164 dst
->group
= src
->group
;
166 if (src
->default_rmap
[afi
][safi
].name
) {
167 dst
->default_rmap
[afi
][safi
].name
=
168 XSTRDUP(MTYPE_ROUTE_MAP_NAME
,
169 src
->default_rmap
[afi
][safi
].name
);
170 dst
->default_rmap
[afi
][safi
].map
=
171 src
->default_rmap
[afi
][safi
].map
;
174 if (DISTRIBUTE_OUT_NAME(srcfilter
)) {
175 DISTRIBUTE_OUT_NAME(dstfilter
) = XSTRDUP(
176 MTYPE_BGP_FILTER_NAME
, DISTRIBUTE_OUT_NAME(srcfilter
));
177 DISTRIBUTE_OUT(dstfilter
) = DISTRIBUTE_OUT(srcfilter
);
180 if (PREFIX_LIST_OUT_NAME(srcfilter
)) {
181 PREFIX_LIST_OUT_NAME(dstfilter
) = XSTRDUP(
182 MTYPE_BGP_FILTER_NAME
, PREFIX_LIST_OUT_NAME(srcfilter
));
183 PREFIX_LIST_OUT(dstfilter
) = PREFIX_LIST_OUT(srcfilter
);
186 if (FILTER_LIST_OUT_NAME(srcfilter
)) {
187 FILTER_LIST_OUT_NAME(dstfilter
) = XSTRDUP(
188 MTYPE_BGP_FILTER_NAME
, FILTER_LIST_OUT_NAME(srcfilter
));
189 FILTER_LIST_OUT(dstfilter
) = FILTER_LIST_OUT(srcfilter
);
192 if (ROUTE_MAP_OUT_NAME(srcfilter
)) {
193 ROUTE_MAP_OUT_NAME(dstfilter
) = XSTRDUP(
194 MTYPE_BGP_FILTER_NAME
, ROUTE_MAP_OUT_NAME(srcfilter
));
195 ROUTE_MAP_OUT(dstfilter
) = ROUTE_MAP_OUT(srcfilter
);
198 if (UNSUPPRESS_MAP_NAME(srcfilter
)) {
199 UNSUPPRESS_MAP_NAME(dstfilter
) = XSTRDUP(
200 MTYPE_BGP_FILTER_NAME
, UNSUPPRESS_MAP_NAME(srcfilter
));
201 UNSUPPRESS_MAP(dstfilter
) = UNSUPPRESS_MAP(srcfilter
);
204 if (ADVERTISE_MAP_NAME(srcfilter
)) {
205 ADVERTISE_MAP_NAME(dstfilter
) = XSTRDUP(
206 MTYPE_BGP_FILTER_NAME
, ADVERTISE_MAP_NAME(srcfilter
));
207 ADVERTISE_MAP(dstfilter
) = ADVERTISE_MAP(srcfilter
);
208 ADVERTISE_CONDITION(dstfilter
) = ADVERTISE_CONDITION(srcfilter
);
211 if (CONDITION_MAP_NAME(srcfilter
)) {
212 CONDITION_MAP_NAME(dstfilter
) = XSTRDUP(
213 MTYPE_BGP_FILTER_NAME
, CONDITION_MAP_NAME(srcfilter
));
214 CONDITION_MAP(dstfilter
) = CONDITION_MAP(srcfilter
);
219 * since we did a bunch of XSTRDUP's in conf_copy, time to free them up
221 static void conf_release(struct peer
*src
, afi_t afi
, safi_t safi
)
223 struct bgp_filter
*srcfilter
;
225 srcfilter
= &src
->filter
[afi
][safi
];
227 XFREE(MTYPE_ROUTE_MAP_NAME
, src
->default_rmap
[afi
][safi
].name
);
229 XFREE(MTYPE_BGP_FILTER_NAME
, srcfilter
->dlist
[FILTER_OUT
].name
);
231 XFREE(MTYPE_BGP_FILTER_NAME
, srcfilter
->plist
[FILTER_OUT
].name
);
233 XFREE(MTYPE_BGP_FILTER_NAME
, srcfilter
->aslist
[FILTER_OUT
].name
);
235 XFREE(MTYPE_BGP_FILTER_NAME
, srcfilter
->map
[RMAP_OUT
].name
);
237 XFREE(MTYPE_BGP_FILTER_NAME
, srcfilter
->usmap
.name
);
239 XFREE(MTYPE_BGP_FILTER_NAME
, srcfilter
->advmap
.aname
);
241 XFREE(MTYPE_BGP_FILTER_NAME
, srcfilter
->advmap
.cname
);
243 XFREE(MTYPE_BGP_PEER_HOST
, src
->host
);
246 static void peer2_updgrp_copy(struct update_group
*updgrp
, struct peer_af
*paf
)
259 updgrp
->afi
= paf
->afi
;
260 updgrp
->safi
= paf
->safi
;
261 updgrp
->afid
= paf
->afid
;
262 updgrp
->bgp
= src
->bgp
;
264 conf_copy(dst
, src
, paf
->afi
, paf
->safi
);
268 * auxiliary functions to maintain the hash table.
269 * - updgrp_hash_alloc - to create a new entry, passed to hash_get
270 * - updgrp_hash_key_make - makes the key for update group search
271 * - updgrp_hash_cmp - compare two update groups.
273 static void *updgrp_hash_alloc(void *p
)
275 struct update_group
*updgrp
;
276 const struct update_group
*in
;
278 in
= (const struct update_group
*)p
;
279 updgrp
= XCALLOC(MTYPE_BGP_UPDGRP
, sizeof(struct update_group
));
280 memcpy(updgrp
, in
, sizeof(struct update_group
));
281 updgrp
->conf
= XCALLOC(MTYPE_BGP_PEER
, sizeof(struct peer
));
282 conf_copy(updgrp
->conf
, in
->conf
, in
->afi
, in
->safi
);
287 * The hash value for a peer is computed from the following variables:
289 * 1. IBGP (1) or EBGP (2)
290 * 2. FLAGS based on configuration:
291 * LOCAL_AS_NO_PREPEND
292 * LOCAL_AS_REPLACE_AS
293 * 3. AF_FLAGS based on configuration:
294 * Refer to definition in bgp_updgrp.h
295 * 4. (AF-independent) Capability flags:
297 * 5. (AF-dependent) Capability flags:
298 * ORF_PREFIX_SM_RCV (peer can send prefix ORF)
301 * 8. Outbound route-map name (neighbor route-map <> out)
302 * 9. Outbound distribute-list name (neighbor distribute-list <> out)
303 * 10. Outbound prefix-list name (neighbor prefix-list <> out)
304 * 11. Outbound as-list name (neighbor filter-list <> out)
305 * 12. Unsuppress map name (neighbor unsuppress-map <>)
306 * 13. default rmap name (neighbor default-originate route-map <>)
307 * 14. encoding both global and link-local nexthop?
308 * 15. If peer is configured to be a lonesoul, peer ip address
309 * 16. Local-as should match, if configured.
310 * 17. maximum-prefix-out
313 static unsigned int updgrp_hash_key_make(const void *p
)
315 const struct update_group
*updgrp
;
316 const struct peer
*peer
;
317 const struct bgp_filter
*filter
;
324 #define SEED2 2147483647
330 flags
= peer
->af_flags
[afi
][safi
];
331 filter
= &peer
->filter
[afi
][safi
];
335 key
= jhash_1word(peer
->sort
, key
); /* EBGP or IBGP */
336 key
= jhash_1word((peer
->flags
& PEER_UPDGRP_FLAGS
), key
);
337 key
= jhash_1word((flags
& PEER_UPDGRP_AF_FLAGS
), key
);
338 key
= jhash_1word((uint32_t)peer
->addpath_type
[afi
][safi
], key
);
339 key
= jhash_1word((peer
->cap
& PEER_UPDGRP_CAP_FLAGS
), key
);
340 key
= jhash_1word((peer
->af_cap
[afi
][safi
] & PEER_UPDGRP_AF_CAP_FLAGS
),
342 key
= jhash_1word(peer
->v_routeadv
, key
);
343 key
= jhash_1word(peer
->change_local_as
, key
);
344 key
= jhash_1word(peer
->max_packet_size
, key
);
345 key
= jhash_1word(peer
->pmax_out
[afi
][safi
], key
);
348 key
= jhash_1word(jhash(peer
->group
->name
,
349 strlen(peer
->group
->name
), SEED1
),
352 if (filter
->map
[RMAP_OUT
].name
)
353 key
= jhash_1word(jhash(filter
->map
[RMAP_OUT
].name
,
354 strlen(filter
->map
[RMAP_OUT
].name
),
358 if (filter
->dlist
[FILTER_OUT
].name
)
359 key
= jhash_1word(jhash(filter
->dlist
[FILTER_OUT
].name
,
360 strlen(filter
->dlist
[FILTER_OUT
].name
),
364 if (filter
->plist
[FILTER_OUT
].name
)
365 key
= jhash_1word(jhash(filter
->plist
[FILTER_OUT
].name
,
366 strlen(filter
->plist
[FILTER_OUT
].name
),
370 if (filter
->aslist
[FILTER_OUT
].name
)
371 key
= jhash_1word(jhash(filter
->aslist
[FILTER_OUT
].name
,
372 strlen(filter
->aslist
[FILTER_OUT
].name
),
376 if (filter
->usmap
.name
)
377 key
= jhash_1word(jhash(filter
->usmap
.name
,
378 strlen(filter
->usmap
.name
), SEED1
),
381 if (filter
->advmap
.aname
)
382 key
= jhash_1word(jhash(filter
->advmap
.aname
,
383 strlen(filter
->advmap
.aname
), SEED1
),
386 if (peer
->default_rmap
[afi
][safi
].name
)
388 jhash(peer
->default_rmap
[afi
][safi
].name
,
389 strlen(peer
->default_rmap
[afi
][safi
].name
),
393 /* If peer is on a shared network and is exchanging IPv6 prefixes,
394 * it needs to include link-local address. That's different from
395 * non-shared-network peers (nexthop encoded with 32 bytes vs 16
396 * bytes). We create different update groups to take care of that.
399 (peer
->shared_network
&& peer_afi_active_nego(peer
, AFI_IP6
)),
403 * There are certain peers that must get their own update-group:
405 * - peers that negotiated ORF
406 * - maximum-prefix-out is set
408 if (CHECK_FLAG(peer
->flags
, PEER_FLAG_LONESOUL
)
409 || CHECK_FLAG(peer
->af_cap
[afi
][safi
], PEER_CAP_ORF_PREFIX_SM_RCV
)
410 || CHECK_FLAG(peer
->af_cap
[afi
][safi
],
411 PEER_CAP_ORF_PREFIX_SM_OLD_RCV
)
412 || CHECK_FLAG(peer
->af_flags
[afi
][safi
], PEER_FLAG_MAX_PREFIX_OUT
))
413 key
= jhash_1word(jhash(peer
->host
, strlen(peer
->host
), SEED2
),
419 static bool updgrp_hash_cmp(const void *p1
, const void *p2
)
421 const struct update_group
*grp1
;
422 const struct update_group
*grp2
;
423 const struct peer
*pe1
;
424 const struct peer
*pe2
;
427 const struct bgp_filter
*fl1
;
428 const struct bgp_filter
*fl2
;
441 flags1
= pe1
->af_flags
[afi
][safi
];
442 flags2
= pe2
->af_flags
[afi
][safi
];
443 fl1
= &pe1
->filter
[afi
][safi
];
444 fl2
= &pe2
->filter
[afi
][safi
];
446 /* put EBGP and IBGP peers in different update groups */
447 if (pe1
->sort
!= pe2
->sort
)
450 /* check peer flags */
451 if ((pe1
->flags
& PEER_UPDGRP_FLAGS
)
452 != (pe2
->flags
& PEER_UPDGRP_FLAGS
))
455 /* If there is 'local-as' configured, it should match. */
456 if (pe1
->change_local_as
!= pe2
->change_local_as
)
459 if (pe1
->pmax_out
[afi
][safi
] != pe2
->pmax_out
[afi
][safi
])
462 /* flags like route reflector client */
463 if ((flags1
& PEER_UPDGRP_AF_FLAGS
) != (flags2
& PEER_UPDGRP_AF_FLAGS
))
466 if (pe1
->addpath_type
[afi
][safi
] != pe2
->addpath_type
[afi
][safi
])
469 if ((pe1
->cap
& PEER_UPDGRP_CAP_FLAGS
)
470 != (pe2
->cap
& PEER_UPDGRP_CAP_FLAGS
))
473 if ((pe1
->af_cap
[afi
][safi
] & PEER_UPDGRP_AF_CAP_FLAGS
)
474 != (pe2
->af_cap
[afi
][safi
] & PEER_UPDGRP_AF_CAP_FLAGS
))
477 if (pe1
->v_routeadv
!= pe2
->v_routeadv
)
480 if (pe1
->group
!= pe2
->group
)
483 /* route-map names should be the same */
484 if ((fl1
->map
[RMAP_OUT
].name
&& !fl2
->map
[RMAP_OUT
].name
)
485 || (!fl1
->map
[RMAP_OUT
].name
&& fl2
->map
[RMAP_OUT
].name
)
486 || (fl1
->map
[RMAP_OUT
].name
&& fl2
->map
[RMAP_OUT
].name
487 && strcmp(fl1
->map
[RMAP_OUT
].name
, fl2
->map
[RMAP_OUT
].name
)))
490 if ((fl1
->dlist
[FILTER_OUT
].name
&& !fl2
->dlist
[FILTER_OUT
].name
)
491 || (!fl1
->dlist
[FILTER_OUT
].name
&& fl2
->dlist
[FILTER_OUT
].name
)
492 || (fl1
->dlist
[FILTER_OUT
].name
&& fl2
->dlist
[FILTER_OUT
].name
493 && strcmp(fl1
->dlist
[FILTER_OUT
].name
,
494 fl2
->dlist
[FILTER_OUT
].name
)))
497 if ((fl1
->plist
[FILTER_OUT
].name
&& !fl2
->plist
[FILTER_OUT
].name
)
498 || (!fl1
->plist
[FILTER_OUT
].name
&& fl2
->plist
[FILTER_OUT
].name
)
499 || (fl1
->plist
[FILTER_OUT
].name
&& fl2
->plist
[FILTER_OUT
].name
500 && strcmp(fl1
->plist
[FILTER_OUT
].name
,
501 fl2
->plist
[FILTER_OUT
].name
)))
504 if ((fl1
->aslist
[FILTER_OUT
].name
&& !fl2
->aslist
[FILTER_OUT
].name
)
505 || (!fl1
->aslist
[FILTER_OUT
].name
&& fl2
->aslist
[FILTER_OUT
].name
)
506 || (fl1
->aslist
[FILTER_OUT
].name
&& fl2
->aslist
[FILTER_OUT
].name
507 && strcmp(fl1
->aslist
[FILTER_OUT
].name
,
508 fl2
->aslist
[FILTER_OUT
].name
)))
511 if ((fl1
->usmap
.name
&& !fl2
->usmap
.name
)
512 || (!fl1
->usmap
.name
&& fl2
->usmap
.name
)
513 || (fl1
->usmap
.name
&& fl2
->usmap
.name
514 && strcmp(fl1
->usmap
.name
, fl2
->usmap
.name
)))
517 if ((fl1
->advmap
.aname
&& !fl2
->advmap
.aname
)
518 || (!fl1
->advmap
.aname
&& fl2
->advmap
.aname
)
519 || (fl1
->advmap
.aname
&& fl2
->advmap
.aname
520 && strcmp(fl1
->advmap
.aname
, fl2
->advmap
.aname
)))
523 if ((pe1
->default_rmap
[afi
][safi
].name
524 && !pe2
->default_rmap
[afi
][safi
].name
)
525 || (!pe1
->default_rmap
[afi
][safi
].name
526 && pe2
->default_rmap
[afi
][safi
].name
)
527 || (pe1
->default_rmap
[afi
][safi
].name
528 && pe2
->default_rmap
[afi
][safi
].name
529 && strcmp(pe1
->default_rmap
[afi
][safi
].name
,
530 pe2
->default_rmap
[afi
][safi
].name
)))
533 if ((afi
== AFI_IP6
) && (pe1
->shared_network
!= pe2
->shared_network
))
536 if ((CHECK_FLAG(pe1
->flags
, PEER_FLAG_LONESOUL
)
537 || CHECK_FLAG(pe1
->af_cap
[afi
][safi
], PEER_CAP_ORF_PREFIX_SM_RCV
)
538 || CHECK_FLAG(pe1
->af_cap
[afi
][safi
],
539 PEER_CAP_ORF_PREFIX_SM_OLD_RCV
))
540 && !sockunion_same(&pe1
->su
, &pe2
->su
))
546 static void peer_lonesoul_or_not(struct peer
*peer
, int set
)
548 /* no change in status? */
549 if (set
== (CHECK_FLAG(peer
->flags
, PEER_FLAG_LONESOUL
) > 0))
553 SET_FLAG(peer
->flags
, PEER_FLAG_LONESOUL
);
555 UNSET_FLAG(peer
->flags
, PEER_FLAG_LONESOUL
);
557 update_group_adjust_peer_afs(peer
);
561 * subgroup_total_packets_enqueued
563 * Returns the total number of packets enqueued to a subgroup.
566 subgroup_total_packets_enqueued(struct update_subgroup
*subgrp
)
570 pkt
= bpacket_queue_last(SUBGRP_PKTQ(subgrp
));
575 static int update_group_show_walkcb(struct update_group
*updgrp
, void *arg
)
577 struct updwalk_context
*ctx
= arg
;
579 struct update_subgroup
*subgrp
;
581 struct bgp_filter
*filter
;
582 struct peer
*peer
= UPDGRP_PEER(updgrp
);
588 if (ctx
->subgrp_id
) {
589 UPDGRP_FOREACH_SUBGRP (updgrp
, subgrp
) {
590 if (ctx
->subgrp_id
&& (ctx
->subgrp_id
!= subgrp
->id
))
602 /* Since this routine is invoked from a walk, we cannot signal
604 /* error here, can only return. */
610 vty_out(vty
, "Update-group %" PRIu64
":\n", updgrp
->id
);
611 vty_out(vty
, " Created: %s", timestamp_string(updgrp
->uptime
));
612 filter
= &updgrp
->conf
->filter
[updgrp
->afi
][updgrp
->safi
];
613 if (filter
->map
[RMAP_OUT
].name
)
614 vty_out(vty
, " Outgoing route map: %s\n",
615 filter
->map
[RMAP_OUT
].name
);
616 vty_out(vty
, " MRAI value (seconds): %d\n", updgrp
->conf
->v_routeadv
);
617 if (updgrp
->conf
->change_local_as
)
618 vty_out(vty
, " Local AS %u%s%s\n",
619 updgrp
->conf
->change_local_as
,
620 CHECK_FLAG(updgrp
->conf
->flags
,
621 PEER_FLAG_LOCAL_AS_NO_PREPEND
)
624 CHECK_FLAG(updgrp
->conf
->flags
,
625 PEER_FLAG_LOCAL_AS_REPLACE_AS
)
629 UPDGRP_FOREACH_SUBGRP (updgrp
, subgrp
) {
630 if (ctx
->subgrp_id
&& (ctx
->subgrp_id
!= subgrp
->id
))
633 vty_out(vty
, " Update-subgroup %" PRIu64
":\n", subgrp
->id
);
634 vty_out(vty
, " Created: %s",
635 timestamp_string(subgrp
->uptime
));
637 if (subgrp
->split_from
.update_group_id
638 || subgrp
->split_from
.subgroup_id
) {
639 vty_out(vty
, " Split from group id: %" PRIu64
"\n",
640 subgrp
->split_from
.update_group_id
);
642 " Split from subgroup id: %" PRIu64
"\n",
643 subgrp
->split_from
.subgroup_id
);
646 vty_out(vty
, " Join events: %u\n", subgrp
->join_events
);
647 vty_out(vty
, " Prune events: %u\n", subgrp
->prune_events
);
648 vty_out(vty
, " Merge events: %u\n", subgrp
->merge_events
);
649 vty_out(vty
, " Split events: %u\n", subgrp
->split_events
);
650 vty_out(vty
, " Update group switch events: %u\n",
651 subgrp
->updgrp_switch_events
);
652 vty_out(vty
, " Peer refreshes combined: %u\n",
653 subgrp
->peer_refreshes_combined
);
654 vty_out(vty
, " Merge checks triggered: %u\n",
655 subgrp
->merge_checks_triggered
);
656 vty_out(vty
, " Coalesce Time: %u%s\n",
657 (UPDGRP_INST(subgrp
->update_group
))->coalesce_time
,
658 subgrp
->t_coalesce
? "(Running)" : "");
659 vty_out(vty
, " Version: %" PRIu64
"\n", subgrp
->version
);
660 vty_out(vty
, " Packet queue length: %d\n",
661 bpacket_queue_length(SUBGRP_PKTQ(subgrp
)));
662 vty_out(vty
, " Total packets enqueued: %u\n",
663 subgroup_total_packets_enqueued(subgrp
));
664 vty_out(vty
, " Packet queue high watermark: %d\n",
665 bpacket_queue_hwm_length(SUBGRP_PKTQ(subgrp
)));
666 vty_out(vty
, " Adj-out list count: %u\n", subgrp
->adj_count
);
667 vty_out(vty
, " Advertise list: %s\n",
668 advertise_list_is_empty(subgrp
) ? "empty"
670 vty_out(vty
, " Flags: %s\n",
671 CHECK_FLAG(subgrp
->flags
, SUBGRP_FLAG_NEEDS_REFRESH
)
675 vty_out(vty
, " Max packet size: %d\n",
676 peer
->max_packet_size
);
677 if (subgrp
->peer_count
> 0) {
678 vty_out(vty
, " Peers:\n");
679 SUBGRP_FOREACH_PEER (subgrp
, paf
)
680 vty_out(vty
, " - %s\n", paf
->peer
->host
);
683 return UPDWALK_CONTINUE
;
687 * Helper function to show the packet queue for each subgroup of update group.
688 * Will be constrained to a particular subgroup id if id !=0
690 static int updgrp_show_packet_queue_walkcb(struct update_group
*updgrp
,
693 struct updwalk_context
*ctx
= arg
;
694 struct update_subgroup
*subgrp
;
698 UPDGRP_FOREACH_SUBGRP (updgrp
, subgrp
) {
699 if (ctx
->subgrp_id
&& (ctx
->subgrp_id
!= subgrp
->id
))
701 vty_out(vty
, "update group %" PRIu64
", subgroup %" PRIu64
"\n",
702 updgrp
->id
, subgrp
->id
);
703 bpacket_queue_show_vty(SUBGRP_PKTQ(subgrp
), vty
);
705 return UPDWALK_CONTINUE
;
709 * Show the packet queue for each subgroup of update group. Will be
710 * constrained to a particular subgroup id if id !=0
712 void update_group_show_packet_queue(struct bgp
*bgp
, afi_t afi
, safi_t safi
,
713 struct vty
*vty
, uint64_t id
)
715 struct updwalk_context ctx
;
717 memset(&ctx
, 0, sizeof(ctx
));
721 update_group_af_walk(bgp
, afi
, safi
, updgrp_show_packet_queue_walkcb
,
725 static struct update_group
*update_group_find(struct peer_af
*paf
)
727 struct update_group
*updgrp
;
728 struct update_group tmp
;
729 struct peer tmp_conf
;
731 if (!peer_established(PAF_PEER(paf
)))
734 memset(&tmp
, 0, sizeof(tmp
));
735 memset(&tmp_conf
, 0, sizeof(tmp_conf
));
736 tmp
.conf
= &tmp_conf
;
737 peer2_updgrp_copy(&tmp
, paf
);
739 updgrp
= hash_lookup(paf
->peer
->bgp
->update_groups
[paf
->afid
], &tmp
);
740 conf_release(&tmp_conf
, paf
->afi
, paf
->safi
);
744 static struct update_group
*update_group_create(struct peer_af
*paf
)
746 struct update_group
*updgrp
;
747 struct update_group tmp
;
748 struct peer tmp_conf
;
750 memset(&tmp
, 0, sizeof(tmp
));
751 memset(&tmp_conf
, 0, sizeof(tmp_conf
));
752 tmp
.conf
= &tmp_conf
;
753 peer2_updgrp_copy(&tmp
, paf
);
755 updgrp
= hash_get(paf
->peer
->bgp
->update_groups
[paf
->afid
], &tmp
,
759 update_group_checkin(updgrp
);
761 if (BGP_DEBUG(update_groups
, UPDATE_GROUPS
))
762 zlog_debug("create update group %" PRIu64
, updgrp
->id
);
764 UPDGRP_GLOBAL_STAT(updgrp
, updgrps_created
) += 1;
766 conf_release(&tmp_conf
, paf
->afi
, paf
->safi
);
770 static void update_group_delete(struct update_group
*updgrp
)
772 if (BGP_DEBUG(update_groups
, UPDATE_GROUPS
))
773 zlog_debug("delete update group %" PRIu64
, updgrp
->id
);
775 UPDGRP_GLOBAL_STAT(updgrp
, updgrps_deleted
) += 1;
777 hash_release(updgrp
->bgp
->update_groups
[updgrp
->afid
], updgrp
);
778 conf_release(updgrp
->conf
, updgrp
->afi
, updgrp
->safi
);
780 XFREE(MTYPE_BGP_PEER_HOST
, updgrp
->conf
->host
);
782 XFREE(MTYPE_BGP_PEER_IFNAME
, updgrp
->conf
->ifname
);
784 XFREE(MTYPE_BGP_PEER
, updgrp
->conf
);
785 XFREE(MTYPE_BGP_UPDGRP
, updgrp
);
788 static void update_group_add_subgroup(struct update_group
*updgrp
,
789 struct update_subgroup
*subgrp
)
791 if (!updgrp
|| !subgrp
)
794 LIST_INSERT_HEAD(&(updgrp
->subgrps
), subgrp
, updgrp_train
);
795 subgrp
->update_group
= updgrp
;
798 static void update_group_remove_subgroup(struct update_group
*updgrp
,
799 struct update_subgroup
*subgrp
)
801 if (!updgrp
|| !subgrp
)
804 LIST_REMOVE(subgrp
, updgrp_train
);
805 subgrp
->update_group
= NULL
;
806 if (LIST_EMPTY(&(updgrp
->subgrps
)))
807 update_group_delete(updgrp
);
810 static struct update_subgroup
*
811 update_subgroup_create(struct update_group
*updgrp
)
813 struct update_subgroup
*subgrp
;
815 subgrp
= XCALLOC(MTYPE_BGP_UPD_SUBGRP
, sizeof(struct update_subgroup
));
816 update_subgroup_checkin(subgrp
, updgrp
);
817 subgrp
->v_coalesce
= (UPDGRP_INST(updgrp
))->coalesce_time
;
818 sync_init(subgrp
, updgrp
);
819 bpacket_queue_init(SUBGRP_PKTQ(subgrp
));
820 bpacket_queue_add(SUBGRP_PKTQ(subgrp
), NULL
, NULL
);
821 TAILQ_INIT(&(subgrp
->adjq
));
822 if (BGP_DEBUG(update_groups
, UPDATE_GROUPS
))
823 zlog_debug("create subgroup u%" PRIu64
":s%" PRIu64
, updgrp
->id
,
826 update_group_add_subgroup(updgrp
, subgrp
);
828 UPDGRP_INCR_STAT(updgrp
, subgrps_created
);
833 static void update_subgroup_delete(struct update_subgroup
*subgrp
)
838 if (subgrp
->update_group
)
839 UPDGRP_INCR_STAT(subgrp
->update_group
, subgrps_deleted
);
841 THREAD_OFF(subgrp
->t_merge_check
);
842 THREAD_OFF(subgrp
->t_coalesce
);
844 bpacket_queue_cleanup(SUBGRP_PKTQ(subgrp
));
845 subgroup_clear_table(subgrp
);
849 if (BGP_DEBUG(update_groups
, UPDATE_GROUPS
) && subgrp
->update_group
)
850 zlog_debug("delete subgroup u%" PRIu64
":s%" PRIu64
,
851 subgrp
->update_group
->id
, subgrp
->id
);
853 update_group_remove_subgroup(subgrp
->update_group
, subgrp
);
855 XFREE(MTYPE_BGP_UPD_SUBGRP
, subgrp
);
858 void update_subgroup_inherit_info(struct update_subgroup
*to
,
859 struct update_subgroup
*from
)
864 to
->sflags
= from
->sflags
;
868 * update_subgroup_check_delete
870 * Delete a subgroup if it is ready to be deleted.
872 * Returns true if the subgroup was deleted.
874 static bool update_subgroup_check_delete(struct update_subgroup
*subgrp
)
879 if (!LIST_EMPTY(&(subgrp
->peers
)))
882 update_subgroup_delete(subgrp
);
888 * update_subgroup_add_peer
890 * @param send_enqueued_packets If true all currently enqueued packets will
891 * also be sent to the peer.
893 static void update_subgroup_add_peer(struct update_subgroup
*subgrp
,
895 int send_enqueued_pkts
)
902 LIST_INSERT_HEAD(&(subgrp
->peers
), paf
, subgrp_train
);
903 paf
->subgroup
= subgrp
;
904 subgrp
->peer_count
++;
906 if (bgp_debug_peer_updout_enabled(paf
->peer
->host
)) {
907 UPDGRP_PEER_DBG_EN(subgrp
->update_group
);
910 SUBGRP_INCR_STAT(subgrp
, join_events
);
912 if (send_enqueued_pkts
) {
913 pkt
= bpacket_queue_first(SUBGRP_PKTQ(subgrp
));
917 * Hang the peer off of the last, placeholder, packet in the
918 * queue. This means it won't see any of the packets that are
919 * currently the queue.
921 pkt
= bpacket_queue_last(SUBGRP_PKTQ(subgrp
));
922 assert(pkt
->buffer
== NULL
);
925 bpacket_add_peer(pkt
, paf
);
927 if (BGP_DEBUG(update_groups
, UPDATE_GROUPS
))
928 zlog_debug("peer %s added to subgroup s%" PRIu64
,
929 paf
->peer
->host
, subgrp
->id
);
933 * update_subgroup_remove_peer_internal
935 * Internal function that removes a peer from a subgroup, but does not
936 * delete the subgroup. A call to this function must almost always be
937 * followed by a call to update_subgroup_check_delete().
939 * @see update_subgroup_remove_peer
941 static void update_subgroup_remove_peer_internal(struct update_subgroup
*subgrp
,
944 assert(subgrp
&& paf
&& subgrp
->update_group
);
946 if (bgp_debug_peer_updout_enabled(paf
->peer
->host
)) {
947 UPDGRP_PEER_DBG_DIS(subgrp
->update_group
);
950 bpacket_queue_remove_peer(paf
);
951 LIST_REMOVE(paf
, subgrp_train
);
952 paf
->subgroup
= NULL
;
953 subgrp
->peer_count
--;
955 if (BGP_DEBUG(update_groups
, UPDATE_GROUPS
))
956 zlog_debug("peer %s deleted from subgroup s%"
957 PRIu64
" peer cnt %d",
958 paf
->peer
->host
, subgrp
->id
, subgrp
->peer_count
);
959 SUBGRP_INCR_STAT(subgrp
, prune_events
);
963 * update_subgroup_remove_peer
965 void update_subgroup_remove_peer(struct update_subgroup
*subgrp
,
971 update_subgroup_remove_peer_internal(subgrp
, paf
);
973 if (update_subgroup_check_delete(subgrp
))
977 * The deletion of the peer may have caused some packets to be
978 * deleted from the subgroup packet queue. Check if the subgroup can
981 update_subgroup_check_merge(subgrp
, "removed peer from subgroup");
984 static struct update_subgroup
*update_subgroup_find(struct update_group
*updgrp
,
987 struct update_subgroup
*subgrp
= NULL
;
996 if (!peer_established(PAF_PEER(paf
)))
999 UPDGRP_FOREACH_SUBGRP (updgrp
, subgrp
) {
1000 if (subgrp
->version
!= version
1001 || CHECK_FLAG(subgrp
->sflags
,
1002 SUBGRP_STATUS_DEFAULT_ORIGINATE
))
1006 * The version number is not meaningful on a subgroup that needs
1009 if (update_subgroup_needs_refresh(subgrp
))
1019 * update_subgroup_ready_for_merge
1021 * Returns true if this subgroup is in a state that allows it to be
1022 * merged into another subgroup.
1024 static bool update_subgroup_ready_for_merge(struct update_subgroup
*subgrp
)
1028 * Not ready if there are any encoded packets waiting to be written
1031 if (!bpacket_queue_is_empty(SUBGRP_PKTQ(subgrp
)))
1035 * Not ready if there enqueued updates waiting to be encoded.
1037 if (!advertise_list_is_empty(subgrp
))
1041 * Don't attempt to merge a subgroup that needs a refresh. For one,
1042 * we can't determine if the adj_out of such a group matches that of
1045 if (update_subgroup_needs_refresh(subgrp
))
1052 * update_subgrp_can_merge_into
1054 * Returns true if the first subgroup can merge into the second
1057 static int update_subgroup_can_merge_into(struct update_subgroup
*subgrp
,
1058 struct update_subgroup
*target
)
1061 if (subgrp
== target
)
1065 * Both must have processed the BRIB to the same point in order to
1068 if (subgrp
->version
!= target
->version
)
1071 if (CHECK_FLAG(subgrp
->sflags
, SUBGRP_STATUS_DEFAULT_ORIGINATE
)
1072 != CHECK_FLAG(target
->sflags
, SUBGRP_STATUS_DEFAULT_ORIGINATE
))
1075 if (subgrp
->adj_count
!= target
->adj_count
)
1078 return update_subgroup_ready_for_merge(target
);
1082 * update_subgroup_merge
1084 * Merge the first subgroup into the second one.
1086 static void update_subgroup_merge(struct update_subgroup
*subgrp
,
1087 struct update_subgroup
*target
,
1090 struct peer_af
*paf
;
1094 assert(subgrp
->adj_count
== target
->adj_count
);
1096 peer_count
= subgrp
->peer_count
;
1099 paf
= LIST_FIRST(&subgrp
->peers
);
1103 update_subgroup_remove_peer_internal(subgrp
, paf
);
1106 * Add the peer to the target subgroup, while making sure that
1107 * any currently enqueued packets won't be sent to it. Enqueued
1108 * packets could, for example, result in an unnecessary withdraw
1109 * followed by an advertise.
1111 update_subgroup_add_peer(target
, paf
, 0);
1114 SUBGRP_INCR_STAT(target
, merge_events
);
1116 if (BGP_DEBUG(update_groups
, UPDATE_GROUPS
))
1117 zlog_debug("u%" PRIu64
":s%" PRIu64
" (%d peers) merged into u%" PRIu64
":s%" PRIu64
", trigger: %s",
1118 subgrp
->update_group
->id
, subgrp
->id
, peer_count
,
1119 target
->update_group
->id
, target
->id
,
1120 reason
? reason
: "unknown");
1122 result
= update_subgroup_check_delete(subgrp
);
1127 * update_subgroup_check_merge
1129 * Merge this subgroup into another subgroup if possible.
1131 * Returns true if the subgroup has been merged. The subgroup pointer
1132 * should not be accessed in this case.
1134 bool update_subgroup_check_merge(struct update_subgroup
*subgrp
,
1137 struct update_subgroup
*target
;
1139 if (!update_subgroup_ready_for_merge(subgrp
))
1143 * Look for a subgroup to merge into.
1145 UPDGRP_FOREACH_SUBGRP (subgrp
->update_group
, target
) {
1146 if (update_subgroup_can_merge_into(subgrp
, target
))
1153 update_subgroup_merge(subgrp
, target
, reason
);
1158 * update_subgroup_merge_check_thread_cb
1160 static void update_subgroup_merge_check_thread_cb(struct thread
*thread
)
1162 struct update_subgroup
*subgrp
;
1164 subgrp
= THREAD_ARG(thread
);
1166 subgrp
->t_merge_check
= NULL
;
1168 update_subgroup_check_merge(subgrp
, "triggered merge check");
1172 * update_subgroup_trigger_merge_check
1174 * Triggers a call to update_subgroup_check_merge() on a clean context.
1176 * @param force If true, the merge check will be triggered even if the
1177 * subgroup doesn't currently look ready for a merge.
1179 * Returns true if a merge check will be performed shortly.
1181 bool update_subgroup_trigger_merge_check(struct update_subgroup
*subgrp
,
1184 if (subgrp
->t_merge_check
)
1187 if (!force
&& !update_subgroup_ready_for_merge(subgrp
))
1190 subgrp
->t_merge_check
= NULL
;
1191 thread_add_timer_msec(bm
->master
, update_subgroup_merge_check_thread_cb
,
1192 subgrp
, 0, &subgrp
->t_merge_check
);
1194 SUBGRP_INCR_STAT(subgrp
, merge_checks_triggered
);
1200 * update_subgroup_copy_adj_out
1202 * Helper function that clones the adj out (state about advertised
1203 * routes) from one subgroup to another. It assumes that the adj out
1204 * of the target subgroup is empty.
1206 static void update_subgroup_copy_adj_out(struct update_subgroup
*source
,
1207 struct update_subgroup
*dest
)
1209 struct bgp_adj_out
*aout
, *aout_copy
;
1211 SUBGRP_FOREACH_ADJ (source
, aout
) {
1215 aout_copy
= bgp_adj_out_alloc(dest
, aout
->dest
,
1216 aout
->addpath_tx_id
);
1218 aout
->attr
? bgp_attr_intern(aout
->attr
) : NULL
;
1221 dest
->scount
= source
->scount
;
1225 * update_subgroup_copy_packets
1227 * Copy packets after and including the given packet to the subgroup
1230 * Returns the number of packets copied.
1232 static int update_subgroup_copy_packets(struct update_subgroup
*dest
,
1233 struct bpacket
*pkt
)
1238 while (pkt
&& pkt
->buffer
) {
1239 bpacket_queue_add(SUBGRP_PKTQ(dest
), stream_dup(pkt
->buffer
),
1242 pkt
= bpacket_next(pkt
);
1248 static bool updgrp_prefix_list_update(struct update_group
*updgrp
,
1252 struct bgp_filter
*filter
;
1254 peer
= UPDGRP_PEER(updgrp
);
1255 filter
= &peer
->filter
[UPDGRP_AFI(updgrp
)][UPDGRP_SAFI(updgrp
)];
1257 if (PREFIX_LIST_OUT_NAME(filter
)
1258 && (strcmp(name
, PREFIX_LIST_OUT_NAME(filter
)) == 0)) {
1259 PREFIX_LIST_OUT(filter
) = prefix_list_lookup(
1260 UPDGRP_AFI(updgrp
), PREFIX_LIST_OUT_NAME(filter
));
1266 static bool updgrp_filter_list_update(struct update_group
*updgrp
,
1270 struct bgp_filter
*filter
;
1272 peer
= UPDGRP_PEER(updgrp
);
1273 filter
= &peer
->filter
[UPDGRP_AFI(updgrp
)][UPDGRP_SAFI(updgrp
)];
1275 if (FILTER_LIST_OUT_NAME(filter
)
1276 && (strcmp(name
, FILTER_LIST_OUT_NAME(filter
)) == 0)) {
1277 FILTER_LIST_OUT(filter
) =
1278 as_list_lookup(FILTER_LIST_OUT_NAME(filter
));
1284 static bool updgrp_distribute_list_update(struct update_group
*updgrp
,
1288 struct bgp_filter
*filter
;
1290 peer
= UPDGRP_PEER(updgrp
);
1291 filter
= &peer
->filter
[UPDGRP_AFI(updgrp
)][UPDGRP_SAFI(updgrp
)];
1293 if (DISTRIBUTE_OUT_NAME(filter
)
1294 && (strcmp(name
, DISTRIBUTE_OUT_NAME(filter
)) == 0)) {
1295 DISTRIBUTE_OUT(filter
) = access_list_lookup(
1296 UPDGRP_AFI(updgrp
), DISTRIBUTE_OUT_NAME(filter
));
1302 static int updgrp_route_map_update(struct update_group
*updgrp
,
1303 const char *name
, int *def_rmap_changed
)
1306 struct bgp_filter
*filter
;
1311 peer
= UPDGRP_PEER(updgrp
);
1312 afi
= UPDGRP_AFI(updgrp
);
1313 safi
= UPDGRP_SAFI(updgrp
);
1314 filter
= &peer
->filter
[afi
][safi
];
1316 if (ROUTE_MAP_OUT_NAME(filter
)
1317 && (strcmp(name
, ROUTE_MAP_OUT_NAME(filter
)) == 0)) {
1318 ROUTE_MAP_OUT(filter
) = route_map_lookup_by_name(name
);
1323 if (UNSUPPRESS_MAP_NAME(filter
)
1324 && (strcmp(name
, UNSUPPRESS_MAP_NAME(filter
)) == 0)) {
1325 UNSUPPRESS_MAP(filter
) = route_map_lookup_by_name(name
);
1329 /* process default-originate route-map */
1330 if (peer
->default_rmap
[afi
][safi
].name
1331 && (strcmp(name
, peer
->default_rmap
[afi
][safi
].name
) == 0)) {
1332 peer
->default_rmap
[afi
][safi
].map
=
1333 route_map_lookup_by_name(name
);
1334 if (def_rmap_changed
)
1335 *def_rmap_changed
= 1;
1341 * hash iteration callback function to process a policy change for an
1342 * update group. Check if the changed policy matches the updgrp's
1343 * outbound route-map or unsuppress-map or default-originate map or
1344 * filter-list or prefix-list or distribute-list.
1345 * Trigger update generation accordingly.
1347 static int updgrp_policy_update_walkcb(struct update_group
*updgrp
, void *arg
)
1349 struct updwalk_context
*ctx
= arg
;
1350 struct update_subgroup
*subgrp
;
1352 int def_changed
= 0;
1354 if (!updgrp
|| !ctx
|| !ctx
->policy_name
)
1355 return UPDWALK_CONTINUE
;
1357 switch (ctx
->policy_type
) {
1358 case BGP_POLICY_ROUTE_MAP
:
1359 changed
= updgrp_route_map_update(updgrp
, ctx
->policy_name
,
1362 case BGP_POLICY_FILTER_LIST
:
1363 changed
= updgrp_filter_list_update(updgrp
, ctx
->policy_name
);
1365 case BGP_POLICY_PREFIX_LIST
:
1366 changed
= updgrp_prefix_list_update(updgrp
, ctx
->policy_name
);
1368 case BGP_POLICY_DISTRIBUTE_LIST
:
1370 updgrp_distribute_list_update(updgrp
, ctx
->policy_name
);
1376 /* If not doing route update, return after updating "config" */
1377 if (!ctx
->policy_route_update
)
1378 return UPDWALK_CONTINUE
;
1380 /* If nothing has changed, return after updating "config" */
1381 if (!changed
&& !def_changed
)
1382 return UPDWALK_CONTINUE
;
1385 * If something has changed, at the beginning of a route-map
1387 * event, mark each subgroup's needs-refresh bit. For one, it signals to
1388 * whoever that the subgroup needs a refresh. Second, it prevents
1390 * merge of this subgroup with another before a complete (outbound)
1393 if (ctx
->policy_event_start_flag
) {
1394 UPDGRP_FOREACH_SUBGRP (updgrp
, subgrp
) {
1395 update_subgroup_set_needs_refresh(subgrp
, 1);
1397 return UPDWALK_CONTINUE
;
1400 UPDGRP_FOREACH_SUBGRP (updgrp
, subgrp
) {
1401 /* Avoid supressing duplicate routes later
1402 * when processing in subgroup_announce_table().
1404 SET_FLAG(subgrp
->sflags
, SUBGRP_STATUS_FORCE_UPDATES
);
1407 if (bgp_debug_update(NULL
, NULL
, updgrp
, 0))
1409 "u%" PRIu64
":s%" PRIu64
" announcing routes upon policy %s (type %d) change",
1410 updgrp
->id
, subgrp
->id
,
1411 ctx
->policy_name
, ctx
->policy_type
);
1412 subgroup_announce_route(subgrp
);
1415 if (bgp_debug_update(NULL
, NULL
, updgrp
, 0))
1417 "u%" PRIu64
":s%" PRIu64
" announcing default upon default routemap %s change",
1418 updgrp
->id
, subgrp
->id
,
1420 subgroup_default_originate(subgrp
, 0);
1422 update_subgroup_set_needs_refresh(subgrp
, 0);
1424 return UPDWALK_CONTINUE
;
1427 static int update_group_walkcb(struct hash_bucket
*bucket
, void *arg
)
1429 struct update_group
*updgrp
= bucket
->data
;
1430 struct updwalk_context
*wctx
= arg
;
1431 int ret
= (*wctx
->cb
)(updgrp
, wctx
->context
);
1435 static int update_group_periodic_merge_walkcb(struct update_group
*updgrp
,
1438 struct update_subgroup
*subgrp
;
1439 struct update_subgroup
*tmp_subgrp
;
1440 const char *reason
= arg
;
1442 UPDGRP_FOREACH_SUBGRP_SAFE (updgrp
, subgrp
, tmp_subgrp
)
1443 update_subgroup_check_merge(subgrp
, reason
);
1444 return UPDWALK_CONTINUE
;
1447 /********************
1449 ********************/
1452 * trigger function when a policy (route-map/filter-list/prefix-list/
1453 * distribute-list etc.) content changes. Go through all the
1454 * update groups and process the change.
1456 * bgp: the bgp instance
1457 * ptype: the type of policy that got modified, see bgpd.h
1458 * pname: name of the policy
1459 * route_update: flag to control if an automatic update generation should
1461 * start_event: flag that indicates if it's the beginning of the change.
1462 * Esp. when the user is changing the content interactively
1463 * over multiple statements. Useful to set dirty flag on
1466 void update_group_policy_update(struct bgp
*bgp
, bgp_policy_type_e ptype
,
1467 const char *pname
, int route_update
,
1470 struct updwalk_context ctx
;
1472 memset(&ctx
, 0, sizeof(ctx
));
1473 ctx
.policy_type
= ptype
;
1474 ctx
.policy_name
= pname
;
1475 ctx
.policy_route_update
= route_update
;
1476 ctx
.policy_event_start_flag
= start_event
;
1479 update_group_walk(bgp
, updgrp_policy_update_walkcb
, &ctx
);
1483 * update_subgroup_split_peer
1485 * Ensure that the given peer is in a subgroup of its own in the
1486 * specified update group.
1488 void update_subgroup_split_peer(struct peer_af
*paf
,
1489 struct update_group
*updgrp
)
1491 struct update_subgroup
*old_subgrp
, *subgrp
;
1495 old_subgrp
= paf
->subgroup
;
1498 updgrp
= old_subgrp
->update_group
;
1501 * If the peer is alone in its subgroup, reuse the existing
1504 if (old_subgrp
->peer_count
== 1) {
1505 if (updgrp
== old_subgrp
->update_group
)
1508 subgrp
= old_subgrp
;
1509 old_id
= old_subgrp
->update_group
->id
;
1511 if (bgp_debug_peer_updout_enabled(paf
->peer
->host
)) {
1512 UPDGRP_PEER_DBG_DIS(old_subgrp
->update_group
);
1515 update_group_remove_subgroup(old_subgrp
->update_group
,
1517 update_group_add_subgroup(updgrp
, subgrp
);
1519 if (bgp_debug_peer_updout_enabled(paf
->peer
->host
)) {
1520 UPDGRP_PEER_DBG_EN(updgrp
);
1522 if (BGP_DEBUG(update_groups
, UPDATE_GROUPS
))
1523 zlog_debug("u%" PRIu64
":s%" PRIu64
" peer %s moved to u%" PRIu64
":s%" PRIu64
,
1524 old_id
, subgrp
->id
, paf
->peer
->host
,
1525 updgrp
->id
, subgrp
->id
);
1528 * The state of the subgroup (adj_out, advs, packet queue etc)
1529 * is consistent internally, but may not be identical to other
1530 * subgroups in the new update group even if the version number
1531 * matches up. Make sure a full refresh is done before the
1532 * subgroup is merged with another.
1534 update_subgroup_set_needs_refresh(subgrp
, 1);
1536 SUBGRP_INCR_STAT(subgrp
, updgrp_switch_events
);
1541 * Create a new subgroup under the specified update group, and copy
1542 * over relevant state to it.
1544 subgrp
= update_subgroup_create(updgrp
);
1545 update_subgroup_inherit_info(subgrp
, old_subgrp
);
1547 subgrp
->split_from
.update_group_id
= old_subgrp
->update_group
->id
;
1548 subgrp
->split_from
.subgroup_id
= old_subgrp
->id
;
1551 * Copy out relevant state from the old subgroup.
1553 update_subgroup_copy_adj_out(paf
->subgroup
, subgrp
);
1554 update_subgroup_copy_packets(subgrp
, paf
->next_pkt_to_send
);
1556 if (BGP_DEBUG(update_groups
, UPDATE_GROUPS
))
1557 zlog_debug("u%" PRIu64
":s%" PRIu64
" peer %s split and moved into u%" PRIu64
":s%" PRIu64
,
1558 paf
->subgroup
->update_group
->id
, paf
->subgroup
->id
,
1559 paf
->peer
->host
, updgrp
->id
, subgrp
->id
);
1561 SUBGRP_INCR_STAT(paf
->subgroup
, split_events
);
1564 * Since queued advs were left behind, this new subgroup needs a
1567 update_subgroup_set_needs_refresh(subgrp
, 1);
1570 * Remove peer from old subgroup, and add it to the new one.
1572 update_subgroup_remove_peer(paf
->subgroup
, paf
);
1574 update_subgroup_add_peer(subgrp
, paf
, 1);
1577 void update_bgp_group_init(struct bgp
*bgp
)
1582 bgp
->update_groups
[afid
] =
1583 hash_create(updgrp_hash_key_make
, updgrp_hash_cmp
,
1584 "BGP Update Group Hash");
1587 void update_bgp_group_free(struct bgp
*bgp
)
1592 if (bgp
->update_groups
[afid
]) {
1593 hash_free(bgp
->update_groups
[afid
]);
1594 bgp
->update_groups
[afid
] = NULL
;
1599 void update_group_show(struct bgp
*bgp
, afi_t afi
, safi_t safi
, struct vty
*vty
,
1602 struct updwalk_context ctx
;
1603 memset(&ctx
, 0, sizeof(ctx
));
1605 ctx
.subgrp_id
= subgrp_id
;
1607 update_group_af_walk(bgp
, afi
, safi
, update_group_show_walkcb
, &ctx
);
1611 * update_group_show_stats
1613 * Show global statistics about update groups.
1615 void update_group_show_stats(struct bgp
*bgp
, struct vty
*vty
)
1617 vty_out(vty
, "Update groups created: %u\n",
1618 bgp
->update_group_stats
.updgrps_created
);
1619 vty_out(vty
, "Update groups deleted: %u\n",
1620 bgp
->update_group_stats
.updgrps_deleted
);
1621 vty_out(vty
, "Update subgroups created: %u\n",
1622 bgp
->update_group_stats
.subgrps_created
);
1623 vty_out(vty
, "Update subgroups deleted: %u\n",
1624 bgp
->update_group_stats
.subgrps_deleted
);
1625 vty_out(vty
, "Join events: %u\n", bgp
->update_group_stats
.join_events
);
1626 vty_out(vty
, "Prune events: %u\n",
1627 bgp
->update_group_stats
.prune_events
);
1628 vty_out(vty
, "Merge events: %u\n",
1629 bgp
->update_group_stats
.merge_events
);
1630 vty_out(vty
, "Split events: %u\n",
1631 bgp
->update_group_stats
.split_events
);
1632 vty_out(vty
, "Update group switch events: %u\n",
1633 bgp
->update_group_stats
.updgrp_switch_events
);
1634 vty_out(vty
, "Peer route refreshes combined: %u\n",
1635 bgp
->update_group_stats
.peer_refreshes_combined
);
1636 vty_out(vty
, "Merge checks triggered: %u\n",
1637 bgp
->update_group_stats
.merge_checks_triggered
);
1641 * update_group_adjust_peer
1643 void update_group_adjust_peer(struct peer_af
*paf
)
1645 struct update_group
*updgrp
;
1646 struct update_subgroup
*subgrp
, *old_subgrp
;
1652 peer
= PAF_PEER(paf
);
1653 if (!peer_established(peer
)) {
1657 if (!CHECK_FLAG(peer
->flags
, PEER_FLAG_CONFIG_NODE
)) {
1661 if (!peer
->afc_nego
[paf
->afi
][paf
->safi
]) {
1665 updgrp
= update_group_find(paf
);
1667 updgrp
= update_group_create(paf
);
1669 flog_err(EC_BGP_UPDGRP_CREATE
,
1670 "couldn't create update group for peer %s",
1676 old_subgrp
= paf
->subgroup
;
1681 * If the update group of the peer is unchanged, the peer can
1683 * in its existing subgroup and we're done.
1685 if (old_subgrp
->update_group
== updgrp
)
1689 * The peer is switching between update groups. Put it in its
1690 * own subgroup under the new update group.
1692 update_subgroup_split_peer(paf
, updgrp
);
1696 subgrp
= update_subgroup_find(updgrp
, paf
);
1698 subgrp
= update_subgroup_create(updgrp
);
1703 update_subgroup_add_peer(subgrp
, paf
, 1);
1704 if (BGP_DEBUG(update_groups
, UPDATE_GROUPS
))
1705 zlog_debug("u%" PRIu64
":s%" PRIu64
" add peer %s", updgrp
->id
,
1706 subgrp
->id
, paf
->peer
->host
);
1711 int update_group_adjust_soloness(struct peer
*peer
, int set
)
1713 struct peer_group
*group
;
1714 struct listnode
*node
, *nnode
;
1716 if (!CHECK_FLAG(peer
->sflags
, PEER_STATUS_GROUP
)) {
1717 peer_lonesoul_or_not(peer
, set
);
1718 if (peer_established(peer
))
1719 bgp_announce_route_all(peer
);
1721 group
= peer
->group
;
1722 for (ALL_LIST_ELEMENTS(group
->peer
, node
, nnode
, peer
)) {
1723 peer_lonesoul_or_not(peer
, set
);
1724 if (peer_established(peer
))
1725 bgp_announce_route_all(peer
);
1732 * update_subgroup_rib
1734 struct bgp_table
*update_subgroup_rib(struct update_subgroup
*subgrp
)
1738 bgp
= SUBGRP_INST(subgrp
);
1742 return bgp
->rib
[SUBGRP_AFI(subgrp
)][SUBGRP_SAFI(subgrp
)];
1745 void update_group_af_walk(struct bgp
*bgp
, afi_t afi
, safi_t safi
,
1746 updgrp_walkcb cb
, void *ctx
)
1748 struct updwalk_context wctx
;
1753 afid
= afindex(afi
, safi
);
1754 if (afid
>= BGP_AF_MAX
)
1757 memset(&wctx
, 0, sizeof(wctx
));
1761 if (bgp
->update_groups
[afid
])
1762 hash_walk(bgp
->update_groups
[afid
], update_group_walkcb
, &wctx
);
1765 void update_group_walk(struct bgp
*bgp
, updgrp_walkcb cb
, void *ctx
)
1770 FOREACH_AFI_SAFI (afi
, safi
) {
1771 update_group_af_walk(bgp
, afi
, safi
, cb
, ctx
);
1775 void 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
) {
1793 peer
= SUBGRP_PEER(subgrp
);
1794 afi
= SUBGRP_AFI(subgrp
);
1795 safi
= SUBGRP_SAFI(subgrp
);
1797 if (peer
->default_rmap
[afi
][safi
].name
) {
1798 subgroup_default_originate(subgrp
, 0);
1802 return UPDWALK_CONTINUE
;
1805 void update_group_refresh_default_originate_route_map(struct thread
*thread
)
1808 char reason
[] = "refresh default-originate route-map";
1810 bgp
= THREAD_ARG(thread
);
1811 update_group_walk(bgp
, update_group_default_originate_route_map_walkcb
,
1813 thread_cancel(&bgp
->t_rmap_def_originate_eval
);
1818 * peer_af_announce_route
1820 * Refreshes routes out to a peer_af immediately.
1822 * If the combine parameter is true, then this function will try to
1823 * gather other peers in the subgroup for which a route announcement
1824 * is pending and efficently announce routes to all of them.
1826 * For now, the 'combine' option has an effect only if all peers in
1827 * the subgroup have a route announcement pending.
1829 void peer_af_announce_route(struct peer_af
*paf
, int combine
)
1831 struct update_subgroup
*subgrp
;
1832 struct peer_af
*cur_paf
;
1835 subgrp
= paf
->subgroup
;
1840 * If there are other peers in the old subgroup that also need
1841 * routes to be announced, pull them into the peer's new
1843 * Combine route announcement with other peers if possible.
1845 * For now, we combine only if all peers in the subgroup have an
1846 * announcement pending.
1850 SUBGRP_FOREACH_PEER (subgrp
, cur_paf
) {
1854 if (cur_paf
->t_announce_route
)
1862 * Announce to the peer alone if we were not asked to combine peers,
1863 * or if some peers don't have a route annoucement pending.
1865 if (!combine
|| !all_pending
) {
1866 update_subgroup_split_peer(paf
, NULL
);
1867 subgrp
= paf
->subgroup
;
1869 assert(subgrp
&& subgrp
->update_group
);
1870 if (bgp_debug_update(paf
->peer
, NULL
, subgrp
->update_group
, 0))
1871 zlog_debug("u%" PRIu64
":s%" PRIu64
" %s announcing routes",
1872 subgrp
->update_group
->id
, subgrp
->id
,
1875 subgroup_announce_route(paf
->subgroup
);
1880 * We will announce routes the entire subgroup.
1882 * First stop refresh timers on all the other peers.
1884 SUBGRP_FOREACH_PEER (subgrp
, cur_paf
) {
1888 bgp_stop_announce_route_timer(cur_paf
);
1891 if (bgp_debug_update(paf
->peer
, NULL
, subgrp
->update_group
, 0))
1892 zlog_debug("u%" PRIu64
":s%" PRIu64
" announcing routes to %s, combined into %d peers",
1893 subgrp
->update_group
->id
, subgrp
->id
,
1894 paf
->peer
->host
, subgrp
->peer_count
);
1896 subgroup_announce_route(subgrp
);
1898 SUBGRP_INCR_STAT_BY(subgrp
, peer_refreshes_combined
,
1899 subgrp
->peer_count
- 1);
1902 void subgroup_trigger_write(struct update_subgroup
*subgrp
)
1904 struct peer_af
*paf
;
1907 * For each peer in the subgroup, schedule a job to pull packets from
1908 * the subgroup output queue into their own output queue. This action
1909 * will trigger a write job on the I/O thread.
1911 SUBGRP_FOREACH_PEER (subgrp
, paf
)
1912 if (peer_established(paf
->peer
))
1913 thread_add_timer_msec(
1914 bm
->master
, bgp_generate_updgrp_packets
,
1916 &paf
->peer
->t_generate_updgrp_packets
);
1919 int update_group_clear_update_dbg(struct update_group
*updgrp
, void *arg
)
1921 UPDGRP_PEER_DBG_OFF(updgrp
);
1922 return UPDWALK_CONTINUE
;
1925 /* Return true if we should addpath encode NLRI to this peer */
1926 bool bgp_addpath_encode_tx(struct peer
*peer
, afi_t afi
, safi_t safi
)
1928 return (CHECK_FLAG(peer
->af_cap
[afi
][safi
], PEER_CAP_ADDPATH_AF_TX_ADV
)
1929 && CHECK_FLAG(peer
->af_cap
[afi
][safi
],
1930 PEER_CAP_ADDPATH_AF_RX_RCV
));
1933 bool bgp_check_selected(struct bgp_path_info
*bpi
, struct peer
*peer
,
1934 bool addpath_capable
, afi_t afi
, safi_t safi
)
1936 return (CHECK_FLAG(bpi
->flags
, BGP_PATH_SELECTED
) ||
1938 bgp_addpath_tx_path(peer
->addpath_type
[afi
][safi
], bpi
)));