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3f9c7369 DS |
1 | /** |
2 | * bgp_updgrp.c: BGP update group structures | |
3 | * | |
4 | * @copyright Copyright (C) 2014 Cumulus Networks, Inc. | |
5 | * | |
6 | * @author Avneesh Sachdev <avneesh@sproute.net> | |
7 | * @author Rajesh Varadarajan <rajesh@sproute.net> | |
8 | * @author Pradosh Mohapatra <pradosh@sproute.net> | |
9 | * | |
10 | * This file is part of GNU Zebra. | |
11 | * | |
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 | |
15 | * later version. | |
16 | * | |
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. | |
21 | * | |
896014f4 DL |
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 | |
3f9c7369 DS |
25 | */ |
26 | ||
27 | #include <zebra.h> | |
28 | ||
29 | #include "prefix.h" | |
30 | #include "thread.h" | |
31 | #include "buffer.h" | |
32 | #include "stream.h" | |
33 | #include "command.h" | |
34 | #include "sockunion.h" | |
35 | #include "network.h" | |
36 | #include "memory.h" | |
37 | #include "filter.h" | |
38 | #include "routemap.h" | |
3f9c7369 DS |
39 | #include "log.h" |
40 | #include "plist.h" | |
41 | #include "linklist.h" | |
42 | #include "workqueue.h" | |
43 | #include "hash.h" | |
44 | #include "jhash.h" | |
45 | #include "queue.h" | |
46 | ||
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" | |
56 | ||
57 | /******************** | |
58 | * PRIVATE FUNCTIONS | |
59 | ********************/ | |
60 | ||
61 | /** | |
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 | |
65 | * the creation. | |
66 | */ | |
d62a17ae | 67 | static void update_group_checkin(struct update_group *updgrp) |
3f9c7369 | 68 | { |
d62a17ae | 69 | updgrp->id = ++bm->updgrp_idspace; |
70 | updgrp->uptime = bgp_clock(); | |
3f9c7369 DS |
71 | } |
72 | ||
d62a17ae | 73 | static void update_subgroup_checkin(struct update_subgroup *subgrp, |
74 | struct update_group *updgrp) | |
3f9c7369 | 75 | { |
d62a17ae | 76 | subgrp->id = ++bm->subgrp_idspace; |
77 | subgrp->uptime = bgp_clock(); | |
3f9c7369 DS |
78 | } |
79 | ||
d62a17ae | 80 | static void sync_init(struct update_subgroup *subgrp) |
3f9c7369 | 81 | { |
d62a17ae | 82 | subgrp->sync = |
83 | XCALLOC(MTYPE_BGP_SYNCHRONISE, sizeof(struct bgp_synchronize)); | |
84 | BGP_ADV_FIFO_INIT(&subgrp->sync->update); | |
85 | BGP_ADV_FIFO_INIT(&subgrp->sync->withdraw); | |
86 | BGP_ADV_FIFO_INIT(&subgrp->sync->withdraw_low); | |
87 | subgrp->hash = hash_create(baa_hash_key, baa_hash_cmp, NULL); | |
88 | ||
89 | /* We use a larger buffer for subgrp->work in the event that: | |
90 | * - We RX a BGP_UPDATE where the attributes alone are just | |
91 | * under BGP_MAX_PACKET_SIZE | |
92 | * - The user configures an outbound route-map that does many as-path | |
93 | * prepends or adds many communities. At most they can have | |
94 | * CMD_ARGC_MAX | |
95 | * args in a route-map so there is a finite limit on how large they | |
96 | * can | |
97 | * make the attributes. | |
98 | * | |
99 | * Having a buffer with BGP_MAX_PACKET_SIZE_OVERFLOW allows us to avoid | |
100 | * bounds | |
101 | * checking for every single attribute as we construct an UPDATE. | |
102 | */ | |
103 | subgrp->work = | |
104 | stream_new(BGP_MAX_PACKET_SIZE + BGP_MAX_PACKET_SIZE_OVERFLOW); | |
105 | subgrp->scratch = stream_new(BGP_MAX_PACKET_SIZE); | |
3f9c7369 DS |
106 | } |
107 | ||
d62a17ae | 108 | static void sync_delete(struct update_subgroup *subgrp) |
3f9c7369 | 109 | { |
d62a17ae | 110 | if (subgrp->sync) |
111 | XFREE(MTYPE_BGP_SYNCHRONISE, subgrp->sync); | |
112 | subgrp->sync = NULL; | |
113 | if (subgrp->hash) | |
114 | hash_free(subgrp->hash); | |
115 | subgrp->hash = NULL; | |
116 | if (subgrp->work) | |
117 | stream_free(subgrp->work); | |
118 | subgrp->work = NULL; | |
119 | if (subgrp->scratch) | |
120 | stream_free(subgrp->scratch); | |
121 | subgrp->scratch = NULL; | |
3f9c7369 DS |
122 | } |
123 | ||
124 | /** | |
125 | * conf_copy | |
126 | * | |
127 | * copy only those fields that are relevant to update group match | |
128 | */ | |
d62a17ae | 129 | static void conf_copy(struct peer *dst, struct peer *src, afi_t afi, |
130 | safi_t safi) | |
3f9c7369 | 131 | { |
d62a17ae | 132 | struct bgp_filter *srcfilter; |
133 | struct bgp_filter *dstfilter; | |
134 | ||
135 | srcfilter = &src->filter[afi][safi]; | |
136 | dstfilter = &dst->filter[afi][safi]; | |
137 | ||
138 | dst->bgp = src->bgp; | |
139 | dst->sort = src->sort; | |
140 | dst->as = src->as; | |
141 | dst->v_routeadv = src->v_routeadv; | |
142 | dst->flags = src->flags; | |
143 | dst->af_flags[afi][safi] = src->af_flags[afi][safi]; | |
144 | if (dst->host) | |
145 | XFREE(MTYPE_BGP_PEER_HOST, dst->host); | |
146 | ||
147 | dst->host = XSTRDUP(MTYPE_BGP_PEER_HOST, src->host); | |
148 | dst->cap = src->cap; | |
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)); | |
156 | ||
157 | dst->group = src->group; | |
158 | ||
159 | if (src->default_rmap[afi][safi].name) { | |
160 | dst->default_rmap[afi][safi].name = | |
161 | XSTRDUP(MTYPE_ROUTE_MAP_NAME, | |
162 | src->default_rmap[afi][safi].name); | |
163 | dst->default_rmap[afi][safi].map = | |
164 | src->default_rmap[afi][safi].map; | |
165 | } | |
166 | ||
167 | if (DISTRIBUTE_OUT_NAME(srcfilter)) { | |
168 | DISTRIBUTE_OUT_NAME(dstfilter) = XSTRDUP( | |
169 | MTYPE_BGP_FILTER_NAME, DISTRIBUTE_OUT_NAME(srcfilter)); | |
170 | DISTRIBUTE_OUT(dstfilter) = DISTRIBUTE_OUT(srcfilter); | |
171 | } | |
172 | ||
173 | if (PREFIX_LIST_OUT_NAME(srcfilter)) { | |
174 | PREFIX_LIST_OUT_NAME(dstfilter) = XSTRDUP( | |
175 | MTYPE_BGP_FILTER_NAME, PREFIX_LIST_OUT_NAME(srcfilter)); | |
176 | PREFIX_LIST_OUT(dstfilter) = PREFIX_LIST_OUT(srcfilter); | |
177 | } | |
178 | ||
179 | if (FILTER_LIST_OUT_NAME(srcfilter)) { | |
180 | FILTER_LIST_OUT_NAME(dstfilter) = XSTRDUP( | |
181 | MTYPE_BGP_FILTER_NAME, FILTER_LIST_OUT_NAME(srcfilter)); | |
182 | FILTER_LIST_OUT(dstfilter) = FILTER_LIST_OUT(srcfilter); | |
183 | } | |
184 | ||
185 | if (ROUTE_MAP_OUT_NAME(srcfilter)) { | |
186 | ROUTE_MAP_OUT_NAME(dstfilter) = XSTRDUP( | |
187 | MTYPE_BGP_FILTER_NAME, ROUTE_MAP_OUT_NAME(srcfilter)); | |
188 | ROUTE_MAP_OUT(dstfilter) = ROUTE_MAP_OUT(srcfilter); | |
189 | } | |
190 | ||
191 | if (UNSUPPRESS_MAP_NAME(srcfilter)) { | |
192 | UNSUPPRESS_MAP_NAME(dstfilter) = XSTRDUP( | |
193 | MTYPE_BGP_FILTER_NAME, UNSUPPRESS_MAP_NAME(srcfilter)); | |
194 | UNSUPPRESS_MAP(dstfilter) = UNSUPPRESS_MAP(srcfilter); | |
195 | } | |
3f9c7369 DS |
196 | } |
197 | ||
198 | /** | |
6e919709 | 199 | * since we did a bunch of XSTRDUP's in conf_copy, time to free them up |
3f9c7369 | 200 | */ |
d62a17ae | 201 | static void conf_release(struct peer *src, afi_t afi, safi_t safi) |
3f9c7369 | 202 | { |
d62a17ae | 203 | struct bgp_filter *srcfilter; |
3f9c7369 | 204 | |
d62a17ae | 205 | srcfilter = &src->filter[afi][safi]; |
3f9c7369 | 206 | |
d62a17ae | 207 | if (src->default_rmap[afi][safi].name) |
208 | XFREE(MTYPE_ROUTE_MAP_NAME, src->default_rmap[afi][safi].name); | |
3f9c7369 | 209 | |
d62a17ae | 210 | if (srcfilter->dlist[FILTER_OUT].name) |
211 | XFREE(MTYPE_BGP_FILTER_NAME, srcfilter->dlist[FILTER_OUT].name); | |
3f9c7369 | 212 | |
d62a17ae | 213 | if (srcfilter->plist[FILTER_OUT].name) |
214 | XFREE(MTYPE_BGP_FILTER_NAME, srcfilter->plist[FILTER_OUT].name); | |
3f9c7369 | 215 | |
d62a17ae | 216 | if (srcfilter->aslist[FILTER_OUT].name) |
217 | XFREE(MTYPE_BGP_FILTER_NAME, | |
218 | srcfilter->aslist[FILTER_OUT].name); | |
3f9c7369 | 219 | |
d62a17ae | 220 | if (srcfilter->map[RMAP_OUT].name) |
221 | XFREE(MTYPE_BGP_FILTER_NAME, srcfilter->map[RMAP_OUT].name); | |
3f9c7369 | 222 | |
d62a17ae | 223 | if (srcfilter->usmap.name) |
224 | XFREE(MTYPE_BGP_FILTER_NAME, srcfilter->usmap.name); | |
495f0b13 | 225 | |
d62a17ae | 226 | if (src->host) |
227 | XFREE(MTYPE_BGP_PEER_HOST, src->host); | |
228 | src->host = NULL; | |
3f9c7369 DS |
229 | } |
230 | ||
d62a17ae | 231 | static void peer2_updgrp_copy(struct update_group *updgrp, struct peer_af *paf) |
3f9c7369 | 232 | { |
d62a17ae | 233 | struct peer *src; |
234 | struct peer *dst; | |
3f9c7369 | 235 | |
d62a17ae | 236 | if (!updgrp || !paf) |
237 | return; | |
3f9c7369 | 238 | |
d62a17ae | 239 | src = paf->peer; |
240 | dst = updgrp->conf; | |
241 | if (!src || !dst) | |
242 | return; | |
3f9c7369 | 243 | |
d62a17ae | 244 | updgrp->afi = paf->afi; |
245 | updgrp->safi = paf->safi; | |
246 | updgrp->afid = paf->afid; | |
247 | updgrp->bgp = src->bgp; | |
3f9c7369 | 248 | |
d62a17ae | 249 | conf_copy(dst, src, paf->afi, paf->safi); |
3f9c7369 DS |
250 | } |
251 | ||
252 | /** | |
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. | |
257 | */ | |
d62a17ae | 258 | static void *updgrp_hash_alloc(void *p) |
3f9c7369 | 259 | { |
d62a17ae | 260 | struct update_group *updgrp; |
261 | const struct update_group *in; | |
262 | ||
263 | in = (const struct update_group *)p; | |
264 | updgrp = XCALLOC(MTYPE_BGP_UPDGRP, sizeof(struct update_group)); | |
265 | memcpy(updgrp, in, sizeof(struct update_group)); | |
266 | updgrp->conf = XCALLOC(MTYPE_BGP_PEER, sizeof(struct peer)); | |
267 | conf_copy(updgrp->conf, in->conf, in->afi, in->safi); | |
268 | return updgrp; | |
3f9c7369 DS |
269 | } |
270 | ||
271 | /** | |
272 | * The hash value for a peer is computed from the following variables: | |
273 | * v = f( | |
274 | * 1. IBGP (1) or EBGP (2) | |
275 | * 2. FLAGS based on configuration: | |
276 | * LOCAL_AS_NO_PREPEND | |
277 | * LOCAL_AS_REPLACE_AS | |
278 | * 3. AF_FLAGS based on configuration: | |
279 | * Refer to definition in bgp_updgrp.h | |
280 | * 4. (AF-independent) Capability flags: | |
281 | * AS4_RCV capability | |
282 | * 5. (AF-dependent) Capability flags: | |
283 | * ORF_PREFIX_SM_RCV (peer can send prefix ORF) | |
284 | * 6. MRAI | |
285 | * 7. peer-group name | |
286 | * 8. Outbound route-map name (neighbor route-map <> out) | |
287 | * 9. Outbound distribute-list name (neighbor distribute-list <> out) | |
288 | * 10. Outbound prefix-list name (neighbor prefix-list <> out) | |
289 | * 11. Outbound as-list name (neighbor filter-list <> out) | |
290 | * 12. Unsuppress map name (neighbor unsuppress-map <>) | |
291 | * 13. default rmap name (neighbor default-originate route-map <>) | |
292 | * 14. encoding both global and link-local nexthop? | |
293 | * 15. If peer is configured to be a lonesoul, peer ip address | |
294 | * 16. Local-as should match, if configured. | |
295 | * ) | |
296 | */ | |
d62a17ae | 297 | static unsigned int updgrp_hash_key_make(void *p) |
3f9c7369 | 298 | { |
d62a17ae | 299 | const struct update_group *updgrp; |
300 | const struct peer *peer; | |
301 | const struct bgp_filter *filter; | |
302 | uint32_t flags; | |
303 | uint32_t key; | |
304 | afi_t afi; | |
305 | safi_t safi; | |
3f9c7369 DS |
306 | |
307 | #define SEED1 999331 | |
308 | #define SEED2 2147483647 | |
309 | ||
d62a17ae | 310 | updgrp = p; |
311 | peer = updgrp->conf; | |
312 | afi = updgrp->afi; | |
313 | safi = updgrp->safi; | |
314 | flags = peer->af_flags[afi][safi]; | |
315 | filter = &peer->filter[afi][safi]; | |
316 | ||
317 | key = 0; | |
318 | ||
319 | key = jhash_1word(peer->sort, key); /* EBGP or IBGP */ | |
320 | key = jhash_1word((peer->flags & PEER_UPDGRP_FLAGS), key); | |
321 | key = jhash_1word((flags & PEER_UPDGRP_AF_FLAGS), key); | |
322 | key = jhash_1word((peer->cap & PEER_UPDGRP_CAP_FLAGS), key); | |
323 | key = jhash_1word((peer->af_cap[afi][safi] & PEER_UPDGRP_AF_CAP_FLAGS), | |
324 | key); | |
325 | key = jhash_1word(peer->v_routeadv, key); | |
326 | key = jhash_1word(peer->change_local_as, key); | |
327 | ||
328 | if (peer->group) | |
329 | key = jhash_1word(jhash(peer->group->name, | |
330 | strlen(peer->group->name), SEED1), | |
331 | key); | |
332 | ||
333 | if (filter->map[RMAP_OUT].name) | |
334 | key = jhash_1word(jhash(filter->map[RMAP_OUT].name, | |
335 | strlen(filter->map[RMAP_OUT].name), | |
336 | SEED1), | |
337 | key); | |
338 | ||
339 | if (filter->dlist[FILTER_OUT].name) | |
340 | key = jhash_1word(jhash(filter->dlist[FILTER_OUT].name, | |
341 | strlen(filter->dlist[FILTER_OUT].name), | |
342 | SEED1), | |
343 | key); | |
344 | ||
345 | if (filter->plist[FILTER_OUT].name) | |
346 | key = jhash_1word(jhash(filter->plist[FILTER_OUT].name, | |
347 | strlen(filter->plist[FILTER_OUT].name), | |
348 | SEED1), | |
349 | key); | |
350 | ||
351 | if (filter->aslist[FILTER_OUT].name) | |
352 | key = jhash_1word(jhash(filter->aslist[FILTER_OUT].name, | |
353 | strlen(filter->aslist[FILTER_OUT].name), | |
354 | SEED1), | |
355 | key); | |
356 | ||
357 | if (filter->usmap.name) | |
358 | key = jhash_1word(jhash(filter->usmap.name, | |
359 | strlen(filter->usmap.name), SEED1), | |
360 | key); | |
361 | ||
362 | if (peer->default_rmap[afi][safi].name) | |
363 | key = jhash_1word( | |
364 | jhash(peer->default_rmap[afi][safi].name, | |
365 | strlen(peer->default_rmap[afi][safi].name), | |
366 | SEED1), | |
367 | key); | |
368 | ||
369 | /* If peer is on a shared network and is exchanging IPv6 prefixes, | |
370 | * it needs to include link-local address. That's different from | |
371 | * non-shared-network peers (nexthop encoded with 32 bytes vs 16 | |
372 | * bytes). We create different update groups to take care of that. | |
373 | */ | |
374 | key = jhash_1word( | |
375 | (peer->shared_network && peer_afi_active_nego(peer, AFI_IP6)), | |
376 | key); | |
377 | ||
378 | /* | |
379 | * There are certain peers that must get their own update-group: | |
380 | * - lonesoul peers | |
381 | * - peers that negotiated ORF | |
382 | */ | |
383 | if (CHECK_FLAG(peer->flags, PEER_FLAG_LONESOUL) | |
384 | || CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ORF_PREFIX_SM_RCV) | |
385 | || CHECK_FLAG(peer->af_cap[afi][safi], | |
386 | PEER_CAP_ORF_PREFIX_SM_OLD_RCV)) | |
387 | key = jhash_1word(jhash(peer->host, strlen(peer->host), SEED2), | |
388 | key); | |
389 | ||
390 | return key; | |
3f9c7369 DS |
391 | } |
392 | ||
d62a17ae | 393 | static int updgrp_hash_cmp(const void *p1, const void *p2) |
3f9c7369 | 394 | { |
d62a17ae | 395 | const struct update_group *grp1; |
396 | const struct update_group *grp2; | |
397 | const struct peer *pe1; | |
398 | const struct peer *pe2; | |
399 | uint32_t flags1; | |
400 | uint32_t flags2; | |
401 | const struct bgp_filter *fl1; | |
402 | const struct bgp_filter *fl2; | |
403 | afi_t afi; | |
404 | safi_t safi; | |
405 | ||
406 | if (!p1 || !p2) | |
407 | return 0; | |
408 | ||
409 | grp1 = p1; | |
410 | grp2 = p2; | |
411 | pe1 = grp1->conf; | |
412 | pe2 = grp2->conf; | |
413 | afi = grp1->afi; | |
414 | safi = grp1->safi; | |
415 | flags1 = pe1->af_flags[afi][safi]; | |
416 | flags2 = pe2->af_flags[afi][safi]; | |
417 | fl1 = &pe1->filter[afi][safi]; | |
418 | fl2 = &pe2->filter[afi][safi]; | |
419 | ||
420 | /* put EBGP and IBGP peers in different update groups */ | |
421 | if (pe1->sort != pe2->sort) | |
422 | return 0; | |
423 | ||
424 | /* check peer flags */ | |
425 | if ((pe1->flags & PEER_UPDGRP_FLAGS) | |
426 | != (pe2->flags & PEER_UPDGRP_FLAGS)) | |
427 | return 0; | |
428 | ||
429 | /* If there is 'local-as' configured, it should match. */ | |
430 | if (pe1->change_local_as != pe2->change_local_as) | |
431 | return 0; | |
432 | ||
433 | /* flags like route reflector client */ | |
434 | if ((flags1 & PEER_UPDGRP_AF_FLAGS) != (flags2 & PEER_UPDGRP_AF_FLAGS)) | |
435 | return 0; | |
436 | ||
437 | if ((pe1->cap & PEER_UPDGRP_CAP_FLAGS) | |
438 | != (pe2->cap & PEER_UPDGRP_CAP_FLAGS)) | |
439 | return 0; | |
440 | ||
441 | if ((pe1->af_cap[afi][safi] & PEER_UPDGRP_AF_CAP_FLAGS) | |
442 | != (pe2->af_cap[afi][safi] & PEER_UPDGRP_AF_CAP_FLAGS)) | |
443 | return 0; | |
444 | ||
445 | if (pe1->v_routeadv != pe2->v_routeadv) | |
446 | return 0; | |
447 | ||
448 | if (pe1->group != pe2->group) | |
449 | return 0; | |
450 | ||
451 | /* route-map names should be the same */ | |
452 | if ((fl1->map[RMAP_OUT].name && !fl2->map[RMAP_OUT].name) | |
453 | || (!fl1->map[RMAP_OUT].name && fl2->map[RMAP_OUT].name) | |
454 | || (fl1->map[RMAP_OUT].name && fl2->map[RMAP_OUT].name | |
455 | && strcmp(fl1->map[RMAP_OUT].name, fl2->map[RMAP_OUT].name))) | |
456 | return 0; | |
457 | ||
458 | if ((fl1->dlist[FILTER_OUT].name && !fl2->dlist[FILTER_OUT].name) | |
459 | || (!fl1->dlist[FILTER_OUT].name && fl2->dlist[FILTER_OUT].name) | |
460 | || (fl1->dlist[FILTER_OUT].name && fl2->dlist[FILTER_OUT].name | |
461 | && strcmp(fl1->dlist[FILTER_OUT].name, | |
462 | fl2->dlist[FILTER_OUT].name))) | |
463 | return 0; | |
464 | ||
465 | if ((fl1->plist[FILTER_OUT].name && !fl2->plist[FILTER_OUT].name) | |
466 | || (!fl1->plist[FILTER_OUT].name && fl2->plist[FILTER_OUT].name) | |
467 | || (fl1->plist[FILTER_OUT].name && fl2->plist[FILTER_OUT].name | |
468 | && strcmp(fl1->plist[FILTER_OUT].name, | |
469 | fl2->plist[FILTER_OUT].name))) | |
470 | return 0; | |
471 | ||
472 | if ((fl1->aslist[FILTER_OUT].name && !fl2->aslist[FILTER_OUT].name) | |
473 | || (!fl1->aslist[FILTER_OUT].name && fl2->aslist[FILTER_OUT].name) | |
474 | || (fl1->aslist[FILTER_OUT].name && fl2->aslist[FILTER_OUT].name | |
475 | && strcmp(fl1->aslist[FILTER_OUT].name, | |
476 | fl2->aslist[FILTER_OUT].name))) | |
477 | return 0; | |
478 | ||
479 | if ((fl1->usmap.name && !fl2->usmap.name) | |
480 | || (!fl1->usmap.name && fl2->usmap.name) | |
481 | || (fl1->usmap.name && fl2->usmap.name | |
482 | && strcmp(fl1->usmap.name, fl2->usmap.name))) | |
483 | return 0; | |
484 | ||
485 | if ((pe1->default_rmap[afi][safi].name | |
486 | && !pe2->default_rmap[afi][safi].name) | |
487 | || (!pe1->default_rmap[afi][safi].name | |
488 | && pe2->default_rmap[afi][safi].name) | |
489 | || (pe1->default_rmap[afi][safi].name | |
490 | && pe2->default_rmap[afi][safi].name | |
491 | && strcmp(pe1->default_rmap[afi][safi].name, | |
492 | pe2->default_rmap[afi][safi].name))) | |
493 | return 0; | |
494 | ||
495 | if ((afi == AFI_IP6) && (pe1->shared_network != pe2->shared_network)) | |
496 | return 0; | |
497 | ||
498 | if ((CHECK_FLAG(pe1->flags, PEER_FLAG_LONESOUL) | |
499 | || CHECK_FLAG(pe1->af_cap[afi][safi], PEER_CAP_ORF_PREFIX_SM_RCV) | |
500 | || CHECK_FLAG(pe1->af_cap[afi][safi], | |
501 | PEER_CAP_ORF_PREFIX_SM_OLD_RCV)) | |
502 | && !sockunion_same(&pe1->su, &pe2->su)) | |
503 | return 0; | |
504 | ||
505 | return 1; | |
3f9c7369 DS |
506 | } |
507 | ||
d62a17ae | 508 | static void peer_lonesoul_or_not(struct peer *peer, int set) |
3f9c7369 | 509 | { |
d62a17ae | 510 | /* no change in status? */ |
511 | if (set == (CHECK_FLAG(peer->flags, PEER_FLAG_LONESOUL) > 0)) | |
512 | return; | |
3f9c7369 | 513 | |
d62a17ae | 514 | if (set) |
515 | SET_FLAG(peer->flags, PEER_FLAG_LONESOUL); | |
516 | else | |
517 | UNSET_FLAG(peer->flags, PEER_FLAG_LONESOUL); | |
3f9c7369 | 518 | |
d62a17ae | 519 | update_group_adjust_peer_afs(peer); |
3f9c7369 DS |
520 | } |
521 | ||
522 | /* | |
523 | * subgroup_total_packets_enqueued | |
524 | * | |
525 | * Returns the total number of packets enqueued to a subgroup. | |
526 | */ | |
527 | static unsigned int | |
d62a17ae | 528 | subgroup_total_packets_enqueued(struct update_subgroup *subgrp) |
3f9c7369 | 529 | { |
d62a17ae | 530 | struct bpacket *pkt; |
3f9c7369 | 531 | |
d62a17ae | 532 | pkt = bpacket_queue_last(SUBGRP_PKTQ(subgrp)); |
3f9c7369 | 533 | |
d62a17ae | 534 | return pkt->ver - 1; |
3f9c7369 DS |
535 | } |
536 | ||
d62a17ae | 537 | static int update_group_show_walkcb(struct update_group *updgrp, void *arg) |
3f9c7369 | 538 | { |
d62a17ae | 539 | struct updwalk_context *ctx = arg; |
540 | struct vty *vty; | |
541 | struct update_subgroup *subgrp; | |
542 | struct peer_af *paf; | |
543 | struct bgp_filter *filter; | |
544 | int match = 0; | |
545 | ||
546 | if (!ctx) | |
547 | return CMD_SUCCESS; | |
548 | ||
549 | if (ctx->subgrp_id) { | |
550 | UPDGRP_FOREACH_SUBGRP(updgrp, subgrp) | |
551 | { | |
552 | if (ctx->subgrp_id && (ctx->subgrp_id != subgrp->id)) | |
553 | continue; | |
554 | else { | |
555 | match = 1; | |
556 | break; | |
557 | } | |
558 | } | |
559 | } else { | |
560 | match = 1; | |
561 | } | |
562 | ||
563 | if (!match) { | |
564 | /* Since this routine is invoked from a walk, we cannot signal | |
565 | * any */ | |
566 | /* error here, can only return. */ | |
567 | return CMD_SUCCESS; | |
568 | } | |
569 | ||
570 | vty = ctx->vty; | |
571 | ||
572 | vty_out(vty, "Update-group %" PRIu64 ":\n", updgrp->id); | |
573 | vty_out(vty, " Created: %s", timestamp_string(updgrp->uptime)); | |
574 | filter = &updgrp->conf->filter[updgrp->afi][updgrp->safi]; | |
575 | if (filter->map[RMAP_OUT].name) | |
576 | vty_out(vty, " Outgoing route map: %s%s\n", | |
577 | filter->map[RMAP_OUT].map ? "X" : "", | |
578 | filter->map[RMAP_OUT].name); | |
579 | vty_out(vty, " MRAI value (seconds): %d\n", updgrp->conf->v_routeadv); | |
580 | if (updgrp->conf->change_local_as) | |
581 | vty_out(vty, " Local AS %u%s%s\n", | |
582 | updgrp->conf->change_local_as, | |
583 | CHECK_FLAG(updgrp->conf->flags, | |
584 | PEER_FLAG_LOCAL_AS_NO_PREPEND) | |
585 | ? " no-prepend" | |
586 | : "", | |
587 | CHECK_FLAG(updgrp->conf->flags, | |
588 | PEER_FLAG_LOCAL_AS_REPLACE_AS) | |
589 | ? " replace-as" | |
590 | : ""); | |
591 | ||
592 | UPDGRP_FOREACH_SUBGRP(updgrp, subgrp) | |
8fe8a7f6 | 593 | { |
d62a17ae | 594 | if (ctx->subgrp_id && (ctx->subgrp_id != subgrp->id)) |
595 | continue; | |
596 | vty_out(vty, "\n"); | |
597 | vty_out(vty, " Update-subgroup %" PRIu64 ":\n", subgrp->id); | |
598 | vty_out(vty, " Created: %s", | |
599 | timestamp_string(subgrp->uptime)); | |
600 | ||
601 | if (subgrp->split_from.update_group_id | |
602 | || subgrp->split_from.subgroup_id) { | |
603 | vty_out(vty, " Split from group id: %" PRIu64 "\n", | |
604 | subgrp->split_from.update_group_id); | |
605 | vty_out(vty, | |
606 | " Split from subgroup id: %" PRIu64 "\n", | |
607 | subgrp->split_from.subgroup_id); | |
608 | } | |
609 | ||
610 | vty_out(vty, " Join events: %u\n", subgrp->join_events); | |
611 | vty_out(vty, " Prune events: %u\n", subgrp->prune_events); | |
612 | vty_out(vty, " Merge events: %u\n", subgrp->merge_events); | |
613 | vty_out(vty, " Split events: %u\n", subgrp->split_events); | |
614 | vty_out(vty, " Update group switch events: %u\n", | |
615 | subgrp->updgrp_switch_events); | |
616 | vty_out(vty, " Peer refreshes combined: %u\n", | |
617 | subgrp->peer_refreshes_combined); | |
618 | vty_out(vty, " Merge checks triggered: %u\n", | |
619 | subgrp->merge_checks_triggered); | |
620 | vty_out(vty, " Version: %" PRIu64 "\n", subgrp->version); | |
621 | vty_out(vty, " Packet queue length: %d\n", | |
622 | bpacket_queue_length(SUBGRP_PKTQ(subgrp))); | |
623 | vty_out(vty, " Total packets enqueued: %u\n", | |
624 | subgroup_total_packets_enqueued(subgrp)); | |
625 | vty_out(vty, " Packet queue high watermark: %d\n", | |
626 | bpacket_queue_hwm_length(SUBGRP_PKTQ(subgrp))); | |
627 | vty_out(vty, " Adj-out list count: %u\n", subgrp->adj_count); | |
628 | vty_out(vty, " Advertise list: %s\n", | |
629 | advertise_list_is_empty(subgrp) ? "empty" | |
630 | : "not empty"); | |
631 | vty_out(vty, " Flags: %s\n", | |
632 | CHECK_FLAG(subgrp->flags, SUBGRP_FLAG_NEEDS_REFRESH) | |
633 | ? "R" | |
634 | : ""); | |
635 | if (subgrp->peer_count > 0) { | |
636 | vty_out(vty, " Peers:\n"); | |
637 | SUBGRP_FOREACH_PEER(subgrp, paf) | |
638 | vty_out(vty, " - %s\n", paf->peer->host); | |
639 | } | |
8fe8a7f6 | 640 | } |
d62a17ae | 641 | return UPDWALK_CONTINUE; |
3f9c7369 DS |
642 | } |
643 | ||
644 | /* | |
645 | * Helper function to show the packet queue for each subgroup of update group. | |
646 | * Will be constrained to a particular subgroup id if id !=0 | |
647 | */ | |
d62a17ae | 648 | static int updgrp_show_packet_queue_walkcb(struct update_group *updgrp, |
649 | void *arg) | |
3f9c7369 | 650 | { |
d62a17ae | 651 | struct updwalk_context *ctx = arg; |
652 | struct update_subgroup *subgrp; | |
653 | struct vty *vty; | |
654 | ||
655 | vty = ctx->vty; | |
656 | UPDGRP_FOREACH_SUBGRP(updgrp, subgrp) | |
657 | { | |
658 | if (ctx->subgrp_id && (ctx->subgrp_id != subgrp->id)) | |
659 | continue; | |
660 | vty_out(vty, "update group %" PRIu64 ", subgroup %" PRIu64 "\n", | |
661 | updgrp->id, subgrp->id); | |
662 | bpacket_queue_show_vty(SUBGRP_PKTQ(subgrp), vty); | |
663 | } | |
664 | return UPDWALK_CONTINUE; | |
3f9c7369 DS |
665 | } |
666 | ||
667 | /* | |
668 | * Show the packet queue for each subgroup of update group. Will be | |
669 | * constrained to a particular subgroup id if id !=0 | |
670 | */ | |
d62a17ae | 671 | void update_group_show_packet_queue(struct bgp *bgp, afi_t afi, safi_t safi, |
672 | struct vty *vty, uint64_t id) | |
3f9c7369 | 673 | { |
d62a17ae | 674 | struct updwalk_context ctx; |
675 | ||
676 | memset(&ctx, 0, sizeof(ctx)); | |
677 | ctx.vty = vty; | |
678 | ctx.subgrp_id = id; | |
679 | ctx.flags = 0; | |
680 | update_group_af_walk(bgp, afi, safi, updgrp_show_packet_queue_walkcb, | |
681 | &ctx); | |
3f9c7369 DS |
682 | } |
683 | ||
d62a17ae | 684 | static struct update_group *update_group_find(struct peer_af *paf) |
3f9c7369 | 685 | { |
d62a17ae | 686 | struct update_group *updgrp; |
687 | struct update_group tmp; | |
688 | struct peer tmp_conf; | |
3f9c7369 | 689 | |
d62a17ae | 690 | if (!peer_established(PAF_PEER(paf))) |
691 | return NULL; | |
3f9c7369 | 692 | |
d62a17ae | 693 | memset(&tmp, 0, sizeof(tmp)); |
694 | memset(&tmp_conf, 0, sizeof(tmp_conf)); | |
695 | tmp.conf = &tmp_conf; | |
696 | peer2_updgrp_copy(&tmp, paf); | |
3f9c7369 | 697 | |
d62a17ae | 698 | updgrp = hash_lookup(paf->peer->bgp->update_groups[paf->afid], &tmp); |
699 | conf_release(&tmp_conf, paf->afi, paf->safi); | |
700 | return updgrp; | |
3f9c7369 DS |
701 | } |
702 | ||
d62a17ae | 703 | static struct update_group *update_group_create(struct peer_af *paf) |
3f9c7369 | 704 | { |
d62a17ae | 705 | struct update_group *updgrp; |
706 | struct update_group tmp; | |
707 | struct peer tmp_conf; | |
3f9c7369 | 708 | |
d62a17ae | 709 | memset(&tmp, 0, sizeof(tmp)); |
710 | memset(&tmp_conf, 0, sizeof(tmp_conf)); | |
711 | tmp.conf = &tmp_conf; | |
712 | peer2_updgrp_copy(&tmp, paf); | |
3f9c7369 | 713 | |
d62a17ae | 714 | updgrp = hash_get(paf->peer->bgp->update_groups[paf->afid], &tmp, |
715 | updgrp_hash_alloc); | |
716 | if (!updgrp) | |
717 | return NULL; | |
718 | update_group_checkin(updgrp); | |
3f9c7369 | 719 | |
d62a17ae | 720 | if (BGP_DEBUG(update_groups, UPDATE_GROUPS)) |
721 | zlog_debug("create update group %" PRIu64, updgrp->id); | |
3f9c7369 | 722 | |
d62a17ae | 723 | UPDGRP_GLOBAL_STAT(updgrp, updgrps_created) += 1; |
3f9c7369 | 724 | |
d62a17ae | 725 | conf_release(&tmp_conf, paf->afi, paf->safi); |
726 | return updgrp; | |
3f9c7369 DS |
727 | } |
728 | ||
d62a17ae | 729 | static void update_group_delete(struct update_group *updgrp) |
3f9c7369 | 730 | { |
d62a17ae | 731 | if (BGP_DEBUG(update_groups, UPDATE_GROUPS)) |
732 | zlog_debug("delete update group %" PRIu64, updgrp->id); | |
3f9c7369 | 733 | |
d62a17ae | 734 | UPDGRP_GLOBAL_STAT(updgrp, updgrps_deleted) += 1; |
3f9c7369 | 735 | |
d62a17ae | 736 | hash_release(updgrp->bgp->update_groups[updgrp->afid], updgrp); |
737 | conf_release(updgrp->conf, updgrp->afi, updgrp->safi); | |
3d68677e | 738 | |
d62a17ae | 739 | if (updgrp->conf->host) |
740 | XFREE(MTYPE_BGP_PEER_HOST, updgrp->conf->host); | |
741 | updgrp->conf->host = NULL; | |
6e919709 | 742 | |
d62a17ae | 743 | if (updgrp->conf->ifname) |
744 | XFREE(MTYPE_BGP_PEER_IFNAME, updgrp->conf->ifname); | |
6e919709 | 745 | |
d62a17ae | 746 | XFREE(MTYPE_BGP_PEER, updgrp->conf); |
747 | XFREE(MTYPE_BGP_UPDGRP, updgrp); | |
3f9c7369 DS |
748 | } |
749 | ||
d62a17ae | 750 | static void update_group_add_subgroup(struct update_group *updgrp, |
751 | struct update_subgroup *subgrp) | |
3f9c7369 | 752 | { |
d62a17ae | 753 | if (!updgrp || !subgrp) |
754 | return; | |
3f9c7369 | 755 | |
d62a17ae | 756 | LIST_INSERT_HEAD(&(updgrp->subgrps), subgrp, updgrp_train); |
757 | subgrp->update_group = updgrp; | |
3f9c7369 DS |
758 | } |
759 | ||
d62a17ae | 760 | static void update_group_remove_subgroup(struct update_group *updgrp, |
761 | struct update_subgroup *subgrp) | |
3f9c7369 | 762 | { |
d62a17ae | 763 | if (!updgrp || !subgrp) |
764 | return; | |
3f9c7369 | 765 | |
d62a17ae | 766 | LIST_REMOVE(subgrp, updgrp_train); |
767 | subgrp->update_group = NULL; | |
768 | if (LIST_EMPTY(&(updgrp->subgrps))) | |
769 | update_group_delete(updgrp); | |
3f9c7369 DS |
770 | } |
771 | ||
772 | static struct update_subgroup * | |
d62a17ae | 773 | update_subgroup_create(struct update_group *updgrp) |
3f9c7369 | 774 | { |
d62a17ae | 775 | struct update_subgroup *subgrp; |
3f9c7369 | 776 | |
d62a17ae | 777 | subgrp = XCALLOC(MTYPE_BGP_UPD_SUBGRP, sizeof(struct update_subgroup)); |
778 | update_subgroup_checkin(subgrp, updgrp); | |
779 | subgrp->v_coalesce = (UPDGRP_INST(updgrp))->coalesce_time; | |
780 | sync_init(subgrp); | |
781 | bpacket_queue_init(SUBGRP_PKTQ(subgrp)); | |
782 | bpacket_queue_add(SUBGRP_PKTQ(subgrp), NULL, NULL); | |
783 | TAILQ_INIT(&(subgrp->adjq)); | |
784 | if (BGP_DEBUG(update_groups, UPDATE_GROUPS)) | |
785 | zlog_debug("create subgroup u%" PRIu64 ":s%" PRIu64, updgrp->id, | |
786 | subgrp->id); | |
3f9c7369 | 787 | |
d62a17ae | 788 | update_group_add_subgroup(updgrp, subgrp); |
3f9c7369 | 789 | |
d62a17ae | 790 | UPDGRP_INCR_STAT(updgrp, subgrps_created); |
3f9c7369 | 791 | |
d62a17ae | 792 | return subgrp; |
3f9c7369 DS |
793 | } |
794 | ||
d62a17ae | 795 | static void update_subgroup_delete(struct update_subgroup *subgrp) |
3f9c7369 | 796 | { |
d62a17ae | 797 | if (!subgrp) |
798 | return; | |
3f9c7369 | 799 | |
d62a17ae | 800 | if (subgrp->update_group) |
801 | UPDGRP_INCR_STAT(subgrp->update_group, subgrps_deleted); | |
3f9c7369 | 802 | |
d62a17ae | 803 | if (subgrp->t_merge_check) |
804 | THREAD_OFF(subgrp->t_merge_check); | |
3f9c7369 | 805 | |
d62a17ae | 806 | if (subgrp->t_coalesce) |
807 | THREAD_TIMER_OFF(subgrp->t_coalesce); | |
3f9c7369 | 808 | |
d62a17ae | 809 | bpacket_queue_cleanup(SUBGRP_PKTQ(subgrp)); |
810 | subgroup_clear_table(subgrp); | |
3f9c7369 | 811 | |
d62a17ae | 812 | if (subgrp->t_coalesce) |
813 | THREAD_TIMER_OFF(subgrp->t_coalesce); | |
814 | sync_delete(subgrp); | |
3f9c7369 | 815 | |
d62a17ae | 816 | if (BGP_DEBUG(update_groups, UPDATE_GROUPS)) |
817 | zlog_debug("delete subgroup u%" PRIu64 ":s%" PRIu64, | |
818 | subgrp->update_group->id, subgrp->id); | |
3f9c7369 | 819 | |
d62a17ae | 820 | update_group_remove_subgroup(subgrp->update_group, subgrp); |
3f9c7369 | 821 | |
d62a17ae | 822 | XFREE(MTYPE_BGP_UPD_SUBGRP, subgrp); |
3f9c7369 DS |
823 | } |
824 | ||
d62a17ae | 825 | void update_subgroup_inherit_info(struct update_subgroup *to, |
826 | struct update_subgroup *from) | |
3f9c7369 | 827 | { |
d62a17ae | 828 | if (!to || !from) |
829 | return; | |
3f9c7369 | 830 | |
d62a17ae | 831 | to->sflags = from->sflags; |
3f9c7369 DS |
832 | } |
833 | ||
834 | /* | |
835 | * update_subgroup_check_delete | |
836 | * | |
837 | * Delete a subgroup if it is ready to be deleted. | |
838 | * | |
839 | * Returns TRUE if the subgroup was deleted. | |
840 | */ | |
d62a17ae | 841 | static int update_subgroup_check_delete(struct update_subgroup *subgrp) |
3f9c7369 | 842 | { |
d62a17ae | 843 | if (!subgrp) |
844 | return 0; | |
3f9c7369 | 845 | |
d62a17ae | 846 | if (!LIST_EMPTY(&(subgrp->peers))) |
847 | return 0; | |
3f9c7369 | 848 | |
d62a17ae | 849 | update_subgroup_delete(subgrp); |
3f9c7369 | 850 | |
d62a17ae | 851 | return 1; |
3f9c7369 DS |
852 | } |
853 | ||
854 | /* | |
855 | * update_subgroup_add_peer | |
856 | * | |
857 | * @param send_enqueued_packets If true all currently enqueued packets will | |
858 | * also be sent to the peer. | |
859 | */ | |
d62a17ae | 860 | static void update_subgroup_add_peer(struct update_subgroup *subgrp, |
861 | struct peer_af *paf, | |
862 | int send_enqueued_pkts) | |
3f9c7369 | 863 | { |
d62a17ae | 864 | struct bpacket *pkt; |
3f9c7369 | 865 | |
d62a17ae | 866 | if (!subgrp || !paf) |
867 | return; | |
3f9c7369 | 868 | |
d62a17ae | 869 | LIST_INSERT_HEAD(&(subgrp->peers), paf, subgrp_train); |
870 | paf->subgroup = subgrp; | |
871 | subgrp->peer_count++; | |
3f9c7369 | 872 | |
d62a17ae | 873 | if (bgp_debug_peer_updout_enabled(paf->peer->host)) { |
874 | UPDGRP_PEER_DBG_EN(subgrp->update_group); | |
875 | } | |
3f9c7369 | 876 | |
d62a17ae | 877 | SUBGRP_INCR_STAT(subgrp, join_events); |
3f9c7369 | 878 | |
d62a17ae | 879 | if (send_enqueued_pkts) { |
880 | pkt = bpacket_queue_first(SUBGRP_PKTQ(subgrp)); | |
881 | } else { | |
3f9c7369 | 882 | |
d62a17ae | 883 | /* |
884 | * Hang the peer off of the last, placeholder, packet in the | |
885 | * queue. This means it won't see any of the packets that are | |
886 | * currently the queue. | |
887 | */ | |
888 | pkt = bpacket_queue_last(SUBGRP_PKTQ(subgrp)); | |
889 | assert(pkt->buffer == NULL); | |
890 | } | |
3f9c7369 | 891 | |
d62a17ae | 892 | bpacket_add_peer(pkt, paf); |
3f9c7369 | 893 | |
d62a17ae | 894 | bpacket_queue_sanity_check(SUBGRP_PKTQ(subgrp)); |
3f9c7369 DS |
895 | } |
896 | ||
897 | /* | |
898 | * update_subgroup_remove_peer_internal | |
899 | * | |
900 | * Internal function that removes a peer from a subgroup, but does not | |
901 | * delete the subgroup. A call to this function must almost always be | |
902 | * followed by a call to update_subgroup_check_delete(). | |
903 | * | |
904 | * @see update_subgroup_remove_peer | |
905 | */ | |
d62a17ae | 906 | static void update_subgroup_remove_peer_internal(struct update_subgroup *subgrp, |
907 | struct peer_af *paf) | |
3f9c7369 | 908 | { |
d62a17ae | 909 | assert(subgrp && paf); |
3f9c7369 | 910 | |
d62a17ae | 911 | if (bgp_debug_peer_updout_enabled(paf->peer->host)) { |
912 | UPDGRP_PEER_DBG_DIS(subgrp->update_group); | |
913 | } | |
3f9c7369 | 914 | |
d62a17ae | 915 | bpacket_queue_remove_peer(paf); |
916 | LIST_REMOVE(paf, subgrp_train); | |
917 | paf->subgroup = NULL; | |
918 | subgrp->peer_count--; | |
3f9c7369 | 919 | |
d62a17ae | 920 | SUBGRP_INCR_STAT(subgrp, prune_events); |
3f9c7369 DS |
921 | } |
922 | ||
923 | /* | |
924 | * update_subgroup_remove_peer | |
925 | */ | |
d62a17ae | 926 | void update_subgroup_remove_peer(struct update_subgroup *subgrp, |
927 | struct peer_af *paf) | |
3f9c7369 | 928 | { |
d62a17ae | 929 | if (!subgrp || !paf) |
930 | return; | |
3f9c7369 | 931 | |
d62a17ae | 932 | update_subgroup_remove_peer_internal(subgrp, paf); |
3f9c7369 | 933 | |
d62a17ae | 934 | if (update_subgroup_check_delete(subgrp)) |
935 | return; | |
3f9c7369 | 936 | |
d62a17ae | 937 | /* |
938 | * The deletion of the peer may have caused some packets to be | |
939 | * deleted from the subgroup packet queue. Check if the subgroup can | |
940 | * be merged now. | |
941 | */ | |
942 | update_subgroup_check_merge(subgrp, "removed peer from subgroup"); | |
3f9c7369 DS |
943 | } |
944 | ||
d62a17ae | 945 | static struct update_subgroup *update_subgroup_find(struct update_group *updgrp, |
946 | struct peer_af *paf) | |
3f9c7369 | 947 | { |
d62a17ae | 948 | struct update_subgroup *subgrp = NULL; |
949 | uint64_t version; | |
950 | ||
951 | if (paf->subgroup) { | |
952 | assert(0); | |
953 | return NULL; | |
954 | } else | |
955 | version = 0; | |
956 | ||
957 | if (!peer_established(PAF_PEER(paf))) | |
958 | return NULL; | |
959 | ||
960 | UPDGRP_FOREACH_SUBGRP(updgrp, subgrp) | |
961 | { | |
962 | if (subgrp->version != version | |
963 | || CHECK_FLAG(subgrp->sflags, | |
964 | SUBGRP_STATUS_DEFAULT_ORIGINATE)) | |
965 | continue; | |
966 | ||
967 | /* | |
968 | * The version number is not meaningful on a subgroup that needs | |
969 | * a refresh. | |
970 | */ | |
971 | if (update_subgroup_needs_refresh(subgrp)) | |
972 | continue; | |
973 | ||
974 | break; | |
975 | } | |
976 | ||
977 | return subgrp; | |
3f9c7369 DS |
978 | } |
979 | ||
980 | /* | |
981 | * update_subgroup_ready_for_merge | |
982 | * | |
983 | * Returns TRUE if this subgroup is in a state that allows it to be | |
984 | * merged into another subgroup. | |
985 | */ | |
d62a17ae | 986 | static int update_subgroup_ready_for_merge(struct update_subgroup *subgrp) |
3f9c7369 DS |
987 | { |
988 | ||
d62a17ae | 989 | /* |
990 | * Not ready if there are any encoded packets waiting to be written | |
991 | * out to peers. | |
992 | */ | |
993 | if (!bpacket_queue_is_empty(SUBGRP_PKTQ(subgrp))) | |
994 | return 0; | |
995 | ||
996 | /* | |
997 | * Not ready if there enqueued updates waiting to be encoded. | |
998 | */ | |
999 | if (!advertise_list_is_empty(subgrp)) | |
1000 | return 0; | |
1001 | ||
1002 | /* | |
1003 | * Don't attempt to merge a subgroup that needs a refresh. For one, | |
1004 | * we can't determine if the adj_out of such a group matches that of | |
1005 | * another group. | |
1006 | */ | |
1007 | if (update_subgroup_needs_refresh(subgrp)) | |
1008 | return 0; | |
1009 | ||
1010 | return 1; | |
3f9c7369 DS |
1011 | } |
1012 | ||
1013 | /* | |
1014 | * update_subgrp_can_merge_into | |
1015 | * | |
1016 | * Returns TRUE if the first subgroup can merge into the second | |
1017 | * subgroup. | |
1018 | */ | |
d62a17ae | 1019 | static int update_subgroup_can_merge_into(struct update_subgroup *subgrp, |
1020 | struct update_subgroup *target) | |
3f9c7369 DS |
1021 | { |
1022 | ||
d62a17ae | 1023 | if (subgrp == target) |
1024 | return 0; | |
3f9c7369 | 1025 | |
d62a17ae | 1026 | /* |
1027 | * Both must have processed the BRIB to the same point in order to | |
1028 | * be merged. | |
1029 | */ | |
1030 | if (subgrp->version != target->version) | |
1031 | return 0; | |
3f9c7369 | 1032 | |
d62a17ae | 1033 | if (CHECK_FLAG(subgrp->sflags, SUBGRP_STATUS_DEFAULT_ORIGINATE) |
1034 | != CHECK_FLAG(target->sflags, SUBGRP_STATUS_DEFAULT_ORIGINATE)) | |
1035 | return 0; | |
f910ef58 | 1036 | |
d62a17ae | 1037 | if (subgrp->adj_count != target->adj_count) |
1038 | return 0; | |
3f9c7369 | 1039 | |
d62a17ae | 1040 | return update_subgroup_ready_for_merge(target); |
3f9c7369 DS |
1041 | } |
1042 | ||
1043 | /* | |
1044 | * update_subgroup_merge | |
1045 | * | |
1046 | * Merge the first subgroup into the second one. | |
1047 | */ | |
d62a17ae | 1048 | static void update_subgroup_merge(struct update_subgroup *subgrp, |
1049 | struct update_subgroup *target, | |
1050 | const char *reason) | |
3f9c7369 | 1051 | { |
d62a17ae | 1052 | struct peer_af *paf; |
1053 | int result; | |
1054 | int peer_count; | |
3f9c7369 | 1055 | |
d62a17ae | 1056 | assert(subgrp->adj_count == target->adj_count); |
3f9c7369 | 1057 | |
d62a17ae | 1058 | peer_count = subgrp->peer_count; |
3f9c7369 | 1059 | |
d62a17ae | 1060 | while (1) { |
1061 | paf = LIST_FIRST(&subgrp->peers); | |
1062 | if (!paf) | |
1063 | break; | |
3f9c7369 | 1064 | |
d62a17ae | 1065 | update_subgroup_remove_peer_internal(subgrp, paf); |
3f9c7369 | 1066 | |
d62a17ae | 1067 | /* |
1068 | * Add the peer to the target subgroup, while making sure that | |
1069 | * any currently enqueued packets won't be sent to it. Enqueued | |
1070 | * packets could, for example, result in an unnecessary withdraw | |
1071 | * followed by an advertise. | |
1072 | */ | |
1073 | update_subgroup_add_peer(target, paf, 0); | |
1074 | } | |
3f9c7369 | 1075 | |
d62a17ae | 1076 | SUBGRP_INCR_STAT(target, merge_events); |
3f9c7369 | 1077 | |
d62a17ae | 1078 | if (BGP_DEBUG(update_groups, UPDATE_GROUPS)) |
1079 | zlog_debug("u%" PRIu64 ":s%" PRIu64 | |
1080 | " (%d peers) merged into u%" PRIu64 ":s%" PRIu64 | |
1081 | ", " | |
1082 | "trigger: %s", | |
1083 | subgrp->update_group->id, subgrp->id, peer_count, | |
1084 | target->update_group->id, target->id, | |
1085 | reason ? reason : "unknown"); | |
3f9c7369 | 1086 | |
d62a17ae | 1087 | result = update_subgroup_check_delete(subgrp); |
1088 | assert(result); | |
3f9c7369 DS |
1089 | } |
1090 | ||
1091 | /* | |
1092 | * update_subgroup_check_merge | |
1093 | * | |
1094 | * Merge this subgroup into another subgroup if possible. | |
1095 | * | |
1096 | * Returns TRUE if the subgroup has been merged. The subgroup pointer | |
1097 | * should not be accessed in this case. | |
1098 | */ | |
d62a17ae | 1099 | int update_subgroup_check_merge(struct update_subgroup *subgrp, |
1100 | const char *reason) | |
3f9c7369 | 1101 | { |
d62a17ae | 1102 | struct update_subgroup *target; |
3f9c7369 | 1103 | |
d62a17ae | 1104 | if (!update_subgroup_ready_for_merge(subgrp)) |
1105 | return 0; | |
3f9c7369 | 1106 | |
d62a17ae | 1107 | /* |
1108 | * Look for a subgroup to merge into. | |
1109 | */ | |
1110 | UPDGRP_FOREACH_SUBGRP(subgrp->update_group, target) | |
1111 | { | |
1112 | if (update_subgroup_can_merge_into(subgrp, target)) | |
1113 | break; | |
1114 | } | |
3f9c7369 | 1115 | |
d62a17ae | 1116 | if (!target) |
1117 | return 0; | |
3f9c7369 | 1118 | |
d62a17ae | 1119 | update_subgroup_merge(subgrp, target, reason); |
1120 | return 1; | |
3f9c7369 DS |
1121 | } |
1122 | ||
d62a17ae | 1123 | /* |
9d303b37 DL |
1124 | * update_subgroup_merge_check_thread_cb |
1125 | */ | |
d62a17ae | 1126 | static int update_subgroup_merge_check_thread_cb(struct thread *thread) |
3f9c7369 | 1127 | { |
d62a17ae | 1128 | struct update_subgroup *subgrp; |
3f9c7369 | 1129 | |
d62a17ae | 1130 | subgrp = THREAD_ARG(thread); |
3f9c7369 | 1131 | |
d62a17ae | 1132 | subgrp->t_merge_check = NULL; |
3f9c7369 | 1133 | |
d62a17ae | 1134 | update_subgroup_check_merge(subgrp, "triggered merge check"); |
1135 | return 0; | |
3f9c7369 DS |
1136 | } |
1137 | ||
1138 | /* | |
1139 | * update_subgroup_trigger_merge_check | |
1140 | * | |
1141 | * Triggers a call to update_subgroup_check_merge() on a clean context. | |
1142 | * | |
1143 | * @param force If true, the merge check will be triggered even if the | |
1144 | * subgroup doesn't currently look ready for a merge. | |
1145 | * | |
1146 | * Returns TRUE if a merge check will be performed shortly. | |
1147 | */ | |
d62a17ae | 1148 | int update_subgroup_trigger_merge_check(struct update_subgroup *subgrp, |
1149 | int force) | |
3f9c7369 | 1150 | { |
d62a17ae | 1151 | if (subgrp->t_merge_check) |
1152 | return 1; | |
3f9c7369 | 1153 | |
d62a17ae | 1154 | if (!force && !update_subgroup_ready_for_merge(subgrp)) |
1155 | return 0; | |
3f9c7369 | 1156 | |
d62a17ae | 1157 | subgrp->t_merge_check = NULL; |
1158 | thread_add_timer_msec(bm->master, update_subgroup_merge_check_thread_cb, | |
1159 | subgrp, 0, &subgrp->t_merge_check); | |
3f9c7369 | 1160 | |
d62a17ae | 1161 | SUBGRP_INCR_STAT(subgrp, merge_checks_triggered); |
3f9c7369 | 1162 | |
d62a17ae | 1163 | return 1; |
3f9c7369 DS |
1164 | } |
1165 | ||
1166 | /* | |
1167 | * update_subgroup_copy_adj_out | |
1168 | * | |
1169 | * Helper function that clones the adj out (state about advertised | |
1170 | * routes) from one subgroup to another. It assumes that the adj out | |
1171 | * of the target subgroup is empty. | |
1172 | */ | |
d62a17ae | 1173 | static void update_subgroup_copy_adj_out(struct update_subgroup *source, |
1174 | struct update_subgroup *dest) | |
3f9c7369 | 1175 | { |
d62a17ae | 1176 | struct bgp_adj_out *aout, *aout_copy; |
1177 | ||
1178 | SUBGRP_FOREACH_ADJ(source, aout) | |
1179 | { | |
1180 | /* | |
1181 | * Copy the adj out. | |
1182 | */ | |
1183 | aout_copy = | |
1184 | bgp_adj_out_alloc(dest, aout->rn, aout->addpath_tx_id); | |
1185 | aout_copy->attr = | |
1186 | aout->attr ? bgp_attr_refcount(aout->attr) : NULL; | |
1187 | } | |
3f9c7369 DS |
1188 | } |
1189 | ||
1190 | /* | |
1191 | * update_subgroup_copy_packets | |
1192 | * | |
1193 | * Copy packets after and including the given packet to the subgroup | |
1194 | * 'dest'. | |
1195 | * | |
1196 | * Returns the number of packets copied. | |
1197 | */ | |
d62a17ae | 1198 | static int update_subgroup_copy_packets(struct update_subgroup *dest, |
1199 | struct bpacket *pkt) | |
3f9c7369 | 1200 | { |
d62a17ae | 1201 | int count; |
1202 | ||
1203 | count = 0; | |
1204 | while (pkt && pkt->buffer) { | |
1205 | bpacket_queue_add(SUBGRP_PKTQ(dest), stream_dup(pkt->buffer), | |
1206 | &pkt->arr); | |
1207 | count++; | |
1208 | pkt = bpacket_next(pkt); | |
1209 | } | |
3f9c7369 | 1210 | |
d62a17ae | 1211 | bpacket_queue_sanity_check(SUBGRP_PKTQ(dest)); |
3f9c7369 | 1212 | |
d62a17ae | 1213 | return count; |
3f9c7369 DS |
1214 | } |
1215 | ||
d62a17ae | 1216 | static int updgrp_prefix_list_update(struct update_group *updgrp, |
1217 | const char *name) | |
3f9c7369 | 1218 | { |
d62a17ae | 1219 | struct peer *peer; |
1220 | struct bgp_filter *filter; | |
1221 | ||
1222 | peer = UPDGRP_PEER(updgrp); | |
1223 | filter = &peer->filter[UPDGRP_AFI(updgrp)][UPDGRP_SAFI(updgrp)]; | |
1224 | ||
1225 | if (PREFIX_LIST_OUT_NAME(filter) | |
1226 | && (strcmp(name, PREFIX_LIST_OUT_NAME(filter)) == 0)) { | |
1227 | PREFIX_LIST_OUT(filter) = prefix_list_lookup( | |
1228 | UPDGRP_AFI(updgrp), PREFIX_LIST_OUT_NAME(filter)); | |
1229 | return 1; | |
1230 | } | |
1231 | return 0; | |
3f9c7369 DS |
1232 | } |
1233 | ||
d62a17ae | 1234 | static int updgrp_filter_list_update(struct update_group *updgrp, |
1235 | const char *name) | |
3f9c7369 | 1236 | { |
d62a17ae | 1237 | struct peer *peer; |
1238 | struct bgp_filter *filter; | |
1239 | ||
1240 | peer = UPDGRP_PEER(updgrp); | |
1241 | filter = &peer->filter[UPDGRP_AFI(updgrp)][UPDGRP_SAFI(updgrp)]; | |
1242 | ||
1243 | if (FILTER_LIST_OUT_NAME(filter) | |
1244 | && (strcmp(name, FILTER_LIST_OUT_NAME(filter)) == 0)) { | |
1245 | FILTER_LIST_OUT(filter) = | |
1246 | as_list_lookup(FILTER_LIST_OUT_NAME(filter)); | |
1247 | return 1; | |
1248 | } | |
1249 | return 0; | |
3f9c7369 DS |
1250 | } |
1251 | ||
d62a17ae | 1252 | static int updgrp_distribute_list_update(struct update_group *updgrp, |
1253 | const char *name) | |
3f9c7369 | 1254 | { |
d62a17ae | 1255 | struct peer *peer; |
1256 | struct bgp_filter *filter; | |
1257 | ||
1258 | peer = UPDGRP_PEER(updgrp); | |
1259 | filter = &peer->filter[UPDGRP_AFI(updgrp)][UPDGRP_SAFI(updgrp)]; | |
1260 | ||
1261 | if (DISTRIBUTE_OUT_NAME(filter) | |
1262 | && (strcmp(name, DISTRIBUTE_OUT_NAME(filter)) == 0)) { | |
1263 | DISTRIBUTE_OUT(filter) = access_list_lookup( | |
1264 | UPDGRP_AFI(updgrp), DISTRIBUTE_OUT_NAME(filter)); | |
1265 | return 1; | |
1266 | } | |
1267 | return 0; | |
3f9c7369 DS |
1268 | } |
1269 | ||
d62a17ae | 1270 | static int updgrp_route_map_update(struct update_group *updgrp, |
1271 | const char *name, int *def_rmap_changed) | |
3f9c7369 | 1272 | { |
d62a17ae | 1273 | struct peer *peer; |
1274 | struct bgp_filter *filter; | |
1275 | int changed = 0; | |
1276 | afi_t afi; | |
1277 | safi_t safi; | |
1278 | ||
1279 | peer = UPDGRP_PEER(updgrp); | |
1280 | afi = UPDGRP_AFI(updgrp); | |
1281 | safi = UPDGRP_SAFI(updgrp); | |
1282 | filter = &peer->filter[afi][safi]; | |
1283 | ||
1284 | if (ROUTE_MAP_OUT_NAME(filter) | |
1285 | && (strcmp(name, ROUTE_MAP_OUT_NAME(filter)) == 0)) { | |
1286 | ROUTE_MAP_OUT(filter) = route_map_lookup_by_name(name); | |
1287 | ||
1288 | changed = 1; | |
1289 | } | |
1290 | ||
1291 | if (UNSUPPRESS_MAP_NAME(filter) | |
1292 | && (strcmp(name, UNSUPPRESS_MAP_NAME(filter)) == 0)) { | |
1293 | UNSUPPRESS_MAP(filter) = route_map_lookup_by_name(name); | |
1294 | changed = 1; | |
1295 | } | |
1296 | ||
1297 | /* process default-originate route-map */ | |
1298 | if (peer->default_rmap[afi][safi].name | |
1299 | && (strcmp(name, peer->default_rmap[afi][safi].name) == 0)) { | |
1300 | peer->default_rmap[afi][safi].map = | |
1301 | route_map_lookup_by_name(name); | |
1302 | if (def_rmap_changed) | |
1303 | *def_rmap_changed = 1; | |
1304 | } | |
1305 | return changed; | |
3f9c7369 DS |
1306 | } |
1307 | ||
1308 | /* | |
1309 | * hash iteration callback function to process a policy change for an | |
1310 | * update group. Check if the changed policy matches the updgrp's | |
1311 | * outbound route-map or unsuppress-map or default-originate map or | |
1312 | * filter-list or prefix-list or distribute-list. | |
1313 | * Trigger update generation accordingly. | |
1314 | */ | |
d62a17ae | 1315 | static int updgrp_policy_update_walkcb(struct update_group *updgrp, void *arg) |
3f9c7369 | 1316 | { |
d62a17ae | 1317 | struct updwalk_context *ctx = arg; |
1318 | struct update_subgroup *subgrp; | |
1319 | int changed = 0; | |
1320 | int def_changed = 0; | |
1321 | ||
1322 | if (!updgrp || !ctx || !ctx->policy_name) | |
1323 | return UPDWALK_CONTINUE; | |
1324 | ||
1325 | switch (ctx->policy_type) { | |
1326 | case BGP_POLICY_ROUTE_MAP: | |
1327 | changed = updgrp_route_map_update(updgrp, ctx->policy_name, | |
1328 | &def_changed); | |
1329 | break; | |
1330 | case BGP_POLICY_FILTER_LIST: | |
1331 | changed = updgrp_filter_list_update(updgrp, ctx->policy_name); | |
1332 | break; | |
1333 | case BGP_POLICY_PREFIX_LIST: | |
1334 | changed = updgrp_prefix_list_update(updgrp, ctx->policy_name); | |
1335 | break; | |
1336 | case BGP_POLICY_DISTRIBUTE_LIST: | |
1337 | changed = | |
1338 | updgrp_distribute_list_update(updgrp, ctx->policy_name); | |
1339 | break; | |
1340 | default: | |
1341 | break; | |
1342 | } | |
1343 | ||
1344 | /* If not doing route update, return after updating "config" */ | |
1345 | if (!ctx->policy_route_update) | |
1346 | return UPDWALK_CONTINUE; | |
1347 | ||
1348 | /* If nothing has changed, return after updating "config" */ | |
1349 | if (!changed && !def_changed) | |
1350 | return UPDWALK_CONTINUE; | |
1351 | ||
1352 | /* | |
1353 | * If something has changed, at the beginning of a route-map | |
1354 | * modification | |
1355 | * event, mark each subgroup's needs-refresh bit. For one, it signals to | |
1356 | * whoever that the subgroup needs a refresh. Second, it prevents | |
1357 | * premature | |
1358 | * merge of this subgroup with another before a complete (outbound) | |
1359 | * refresh. | |
1360 | */ | |
1361 | if (ctx->policy_event_start_flag) { | |
1362 | UPDGRP_FOREACH_SUBGRP(updgrp, subgrp) | |
1363 | { | |
1364 | update_subgroup_set_needs_refresh(subgrp, 1); | |
1365 | } | |
1366 | return UPDWALK_CONTINUE; | |
1367 | } | |
1368 | ||
1369 | UPDGRP_FOREACH_SUBGRP(updgrp, subgrp) | |
1370 | { | |
1371 | if (changed) { | |
1372 | if (bgp_debug_update(NULL, NULL, updgrp, 0)) | |
1373 | zlog_debug( | |
1374 | "u%" PRIu64 ":s%" PRIu64 | |
1375 | " announcing routes upon policy %s (type %d) change", | |
1376 | updgrp->id, subgrp->id, | |
1377 | ctx->policy_name, ctx->policy_type); | |
1378 | subgroup_announce_route(subgrp); | |
1379 | } | |
1380 | if (def_changed) { | |
1381 | if (bgp_debug_update(NULL, NULL, updgrp, 0)) | |
1382 | zlog_debug( | |
1383 | "u%" PRIu64 ":s%" PRIu64 | |
1384 | " announcing default upon default routemap %s change", | |
1385 | updgrp->id, subgrp->id, | |
1386 | ctx->policy_name); | |
1387 | subgroup_default_originate(subgrp, 0); | |
1388 | } | |
1389 | update_subgroup_set_needs_refresh(subgrp, 0); | |
1390 | } | |
1391 | return UPDWALK_CONTINUE; | |
3f9c7369 DS |
1392 | } |
1393 | ||
d62a17ae | 1394 | static int update_group_walkcb(struct hash_backet *backet, void *arg) |
3f9c7369 | 1395 | { |
d62a17ae | 1396 | struct update_group *updgrp = backet->data; |
1397 | struct updwalk_context *wctx = arg; | |
1398 | int ret = (*wctx->cb)(updgrp, wctx->context); | |
1399 | return ret; | |
3f9c7369 DS |
1400 | } |
1401 | ||
d62a17ae | 1402 | static int update_group_periodic_merge_walkcb(struct update_group *updgrp, |
1403 | void *arg) | |
3f9c7369 | 1404 | { |
d62a17ae | 1405 | struct update_subgroup *subgrp; |
1406 | struct update_subgroup *tmp_subgrp; | |
1407 | const char *reason = arg; | |
3f9c7369 | 1408 | |
d62a17ae | 1409 | UPDGRP_FOREACH_SUBGRP_SAFE(updgrp, subgrp, tmp_subgrp) |
1410 | update_subgroup_check_merge(subgrp, reason); | |
1411 | return UPDWALK_CONTINUE; | |
3f9c7369 DS |
1412 | } |
1413 | ||
1414 | /******************** | |
1415 | * PUBLIC FUNCTIONS | |
1416 | ********************/ | |
1417 | ||
1418 | /* | |
1419 | * trigger function when a policy (route-map/filter-list/prefix-list/ | |
1420 | * distribute-list etc.) content changes. Go through all the | |
1421 | * update groups and process the change. | |
1422 | * | |
1423 | * bgp: the bgp instance | |
1424 | * ptype: the type of policy that got modified, see bgpd.h | |
1425 | * pname: name of the policy | |
1426 | * route_update: flag to control if an automatic update generation should | |
1427 | * occur | |
1428 | * start_event: flag that indicates if it's the beginning of the change. | |
1429 | * Esp. when the user is changing the content interactively | |
1430 | * over multiple statements. Useful to set dirty flag on | |
1431 | * update groups. | |
1432 | */ | |
d62a17ae | 1433 | void update_group_policy_update(struct bgp *bgp, bgp_policy_type_e ptype, |
1434 | const char *pname, int route_update, | |
1435 | int start_event) | |
3f9c7369 | 1436 | { |
d62a17ae | 1437 | struct updwalk_context ctx; |
3f9c7369 | 1438 | |
d62a17ae | 1439 | memset(&ctx, 0, sizeof(ctx)); |
1440 | ctx.policy_type = ptype; | |
1441 | ctx.policy_name = pname; | |
1442 | ctx.policy_route_update = route_update; | |
1443 | ctx.policy_event_start_flag = start_event; | |
1444 | ctx.flags = 0; | |
3f9c7369 | 1445 | |
d62a17ae | 1446 | update_group_walk(bgp, updgrp_policy_update_walkcb, &ctx); |
3f9c7369 DS |
1447 | } |
1448 | ||
1449 | /* | |
1450 | * update_subgroup_split_peer | |
1451 | * | |
1452 | * Ensure that the given peer is in a subgroup of its own in the | |
1453 | * specified update group. | |
1454 | */ | |
d62a17ae | 1455 | void update_subgroup_split_peer(struct peer_af *paf, |
1456 | struct update_group *updgrp) | |
3f9c7369 | 1457 | { |
d62a17ae | 1458 | struct update_subgroup *old_subgrp, *subgrp; |
1459 | uint64_t old_id; | |
1460 | ||
1461 | ||
1462 | old_subgrp = paf->subgroup; | |
1463 | ||
1464 | if (!updgrp) | |
1465 | updgrp = old_subgrp->update_group; | |
1466 | ||
1467 | /* | |
1468 | * If the peer is alone in its subgroup, reuse the existing | |
1469 | * subgroup. | |
1470 | */ | |
1471 | if (old_subgrp->peer_count == 1) { | |
1472 | if (updgrp == old_subgrp->update_group) | |
1473 | return; | |
1474 | ||
1475 | subgrp = old_subgrp; | |
1476 | old_id = old_subgrp->update_group->id; | |
1477 | ||
1478 | if (bgp_debug_peer_updout_enabled(paf->peer->host)) { | |
1479 | UPDGRP_PEER_DBG_DIS(old_subgrp->update_group); | |
1480 | } | |
1481 | ||
1482 | update_group_remove_subgroup(old_subgrp->update_group, | |
1483 | old_subgrp); | |
1484 | update_group_add_subgroup(updgrp, subgrp); | |
1485 | ||
1486 | if (bgp_debug_peer_updout_enabled(paf->peer->host)) { | |
1487 | UPDGRP_PEER_DBG_EN(updgrp); | |
1488 | } | |
1489 | if (BGP_DEBUG(update_groups, UPDATE_GROUPS)) | |
1490 | zlog_debug("u%" PRIu64 ":s%" PRIu64 | |
1491 | " peer %s moved to u%" PRIu64 ":s%" PRIu64, | |
1492 | old_id, subgrp->id, paf->peer->host, | |
1493 | updgrp->id, subgrp->id); | |
1494 | ||
1495 | /* | |
1496 | * The state of the subgroup (adj_out, advs, packet queue etc) | |
1497 | * is consistent internally, but may not be identical to other | |
1498 | * subgroups in the new update group even if the version number | |
1499 | * matches up. Make sure a full refresh is done before the | |
1500 | * subgroup is merged with another. | |
1501 | */ | |
1502 | update_subgroup_set_needs_refresh(subgrp, 1); | |
1503 | ||
1504 | SUBGRP_INCR_STAT(subgrp, updgrp_switch_events); | |
1505 | return; | |
1506 | } | |
3f9c7369 | 1507 | |
d62a17ae | 1508 | /* |
1509 | * Create a new subgroup under the specified update group, and copy | |
1510 | * over relevant state to it. | |
1511 | */ | |
1512 | subgrp = update_subgroup_create(updgrp); | |
1513 | update_subgroup_inherit_info(subgrp, old_subgrp); | |
1514 | ||
1515 | subgrp->split_from.update_group_id = old_subgrp->update_group->id; | |
1516 | subgrp->split_from.subgroup_id = old_subgrp->id; | |
1517 | ||
1518 | /* | |
1519 | * Copy out relevant state from the old subgroup. | |
1520 | */ | |
1521 | update_subgroup_copy_adj_out(paf->subgroup, subgrp); | |
1522 | update_subgroup_copy_packets(subgrp, paf->next_pkt_to_send); | |
1523 | ||
1524 | if (BGP_DEBUG(update_groups, UPDATE_GROUPS)) | |
1525 | zlog_debug("u%" PRIu64 ":s%" PRIu64 | |
1526 | " peer %s split and moved into u%" PRIu64 | |
1527 | ":s%" PRIu64, | |
1528 | paf->subgroup->update_group->id, paf->subgroup->id, | |
1529 | paf->peer->host, updgrp->id, subgrp->id); | |
1530 | ||
1531 | SUBGRP_INCR_STAT(paf->subgroup, split_events); | |
1532 | ||
1533 | /* | |
1534 | * Since queued advs were left behind, this new subgroup needs a | |
1535 | * refresh. | |
1536 | */ | |
1537 | update_subgroup_set_needs_refresh(subgrp, 1); | |
1538 | ||
1539 | /* | |
1540 | * Remove peer from old subgroup, and add it to the new one. | |
1541 | */ | |
1542 | update_subgroup_remove_peer(paf->subgroup, paf); | |
1543 | ||
1544 | update_subgroup_add_peer(subgrp, paf, 1); | |
3f9c7369 DS |
1545 | } |
1546 | ||
d62a17ae | 1547 | void update_bgp_group_init(struct bgp *bgp) |
3f9c7369 | 1548 | { |
d62a17ae | 1549 | int afid; |
3f9c7369 | 1550 | |
d62a17ae | 1551 | AF_FOREACH(afid) |
1552 | bgp->update_groups[afid] = | |
1553 | hash_create(updgrp_hash_key_make, updgrp_hash_cmp, NULL); | |
3f9c7369 DS |
1554 | } |
1555 | ||
d62a17ae | 1556 | void update_bgp_group_free(struct bgp *bgp) |
3d68677e | 1557 | { |
d62a17ae | 1558 | int afid; |
1559 | ||
1560 | AF_FOREACH(afid) | |
1561 | { | |
1562 | if (bgp->update_groups[afid]) { | |
1563 | hash_free(bgp->update_groups[afid]); | |
1564 | bgp->update_groups[afid] = NULL; | |
1565 | } | |
1566 | } | |
3d68677e DS |
1567 | } |
1568 | ||
d62a17ae | 1569 | void update_group_show(struct bgp *bgp, afi_t afi, safi_t safi, struct vty *vty, |
1570 | uint64_t subgrp_id) | |
3f9c7369 | 1571 | { |
d62a17ae | 1572 | struct updwalk_context ctx; |
1573 | memset(&ctx, 0, sizeof(ctx)); | |
1574 | ctx.vty = vty; | |
1575 | ctx.subgrp_id = subgrp_id; | |
8fe8a7f6 | 1576 | |
d62a17ae | 1577 | update_group_af_walk(bgp, afi, safi, update_group_show_walkcb, &ctx); |
3f9c7369 DS |
1578 | } |
1579 | ||
1580 | /* | |
1581 | * update_group_show_stats | |
1582 | * | |
1583 | * Show global statistics about update groups. | |
1584 | */ | |
d62a17ae | 1585 | void update_group_show_stats(struct bgp *bgp, struct vty *vty) |
3f9c7369 | 1586 | { |
d62a17ae | 1587 | vty_out(vty, "Update groups created: %u\n", |
1588 | bgp->update_group_stats.updgrps_created); | |
1589 | vty_out(vty, "Update groups deleted: %u\n", | |
1590 | bgp->update_group_stats.updgrps_deleted); | |
1591 | vty_out(vty, "Update subgroups created: %u\n", | |
1592 | bgp->update_group_stats.subgrps_created); | |
1593 | vty_out(vty, "Update subgroups deleted: %u\n", | |
1594 | bgp->update_group_stats.subgrps_deleted); | |
1595 | vty_out(vty, "Join events: %u\n", bgp->update_group_stats.join_events); | |
1596 | vty_out(vty, "Prune events: %u\n", | |
1597 | bgp->update_group_stats.prune_events); | |
1598 | vty_out(vty, "Merge events: %u\n", | |
1599 | bgp->update_group_stats.merge_events); | |
1600 | vty_out(vty, "Split events: %u\n", | |
1601 | bgp->update_group_stats.split_events); | |
1602 | vty_out(vty, "Update group switch events: %u\n", | |
1603 | bgp->update_group_stats.updgrp_switch_events); | |
1604 | vty_out(vty, "Peer route refreshes combined: %u\n", | |
1605 | bgp->update_group_stats.peer_refreshes_combined); | |
1606 | vty_out(vty, "Merge checks triggered: %u\n", | |
1607 | bgp->update_group_stats.merge_checks_triggered); | |
3f9c7369 DS |
1608 | } |
1609 | ||
1610 | /* | |
1611 | * update_group_adjust_peer | |
1612 | */ | |
d62a17ae | 1613 | void update_group_adjust_peer(struct peer_af *paf) |
3f9c7369 | 1614 | { |
d62a17ae | 1615 | struct update_group *updgrp; |
1616 | struct update_subgroup *subgrp, *old_subgrp; | |
1617 | struct peer *peer; | |
1618 | ||
1619 | if (!paf) | |
1620 | return; | |
1621 | ||
1622 | peer = PAF_PEER(paf); | |
1623 | if (!peer_established(peer)) { | |
1624 | return; | |
1625 | } | |
1626 | ||
1627 | if (!CHECK_FLAG(peer->flags, PEER_FLAG_CONFIG_NODE)) { | |
1628 | return; | |
3f9c7369 | 1629 | } |
3f9c7369 | 1630 | |
d62a17ae | 1631 | if (!peer->afc_nego[paf->afi][paf->safi]) { |
1632 | return; | |
1633 | } | |
3f9c7369 | 1634 | |
d62a17ae | 1635 | updgrp = update_group_find(paf); |
1636 | if (!updgrp) { | |
1637 | updgrp = update_group_create(paf); | |
1638 | if (!updgrp) { | |
1639 | zlog_err("couldn't create update group for peer %s", | |
1640 | paf->peer->host); | |
1641 | return; | |
1642 | } | |
1643 | } | |
3f9c7369 | 1644 | |
d62a17ae | 1645 | old_subgrp = paf->subgroup; |
3f9c7369 | 1646 | |
d62a17ae | 1647 | if (old_subgrp) { |
3f9c7369 | 1648 | |
d62a17ae | 1649 | /* |
1650 | * If the update group of the peer is unchanged, the peer can | |
1651 | * stay | |
1652 | * in its existing subgroup and we're done. | |
1653 | */ | |
1654 | if (old_subgrp->update_group == updgrp) | |
1655 | return; | |
1656 | ||
1657 | /* | |
1658 | * The peer is switching between update groups. Put it in its | |
1659 | * own subgroup under the new update group. | |
1660 | */ | |
1661 | update_subgroup_split_peer(paf, updgrp); | |
1662 | return; | |
1663 | } | |
1664 | ||
1665 | subgrp = update_subgroup_find(updgrp, paf); | |
1666 | if (!subgrp) { | |
1667 | subgrp = update_subgroup_create(updgrp); | |
1668 | if (!subgrp) | |
1669 | return; | |
1670 | } | |
3f9c7369 | 1671 | |
d62a17ae | 1672 | update_subgroup_add_peer(subgrp, paf, 1); |
1673 | if (BGP_DEBUG(update_groups, UPDATE_GROUPS)) | |
1674 | zlog_debug("u%" PRIu64 ":s%" PRIu64 " add peer %s", updgrp->id, | |
1675 | subgrp->id, paf->peer->host); | |
1676 | ||
1677 | return; | |
3f9c7369 DS |
1678 | } |
1679 | ||
d62a17ae | 1680 | int update_group_adjust_soloness(struct peer *peer, int set) |
3f9c7369 | 1681 | { |
d62a17ae | 1682 | struct peer_group *group; |
1683 | struct listnode *node, *nnode; | |
1684 | ||
1685 | if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) { | |
1686 | peer_lonesoul_or_not(peer, set); | |
1687 | if (peer->status == Established) | |
1688 | bgp_announce_route_all(peer); | |
1689 | } else { | |
1690 | group = peer->group; | |
1691 | for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) { | |
1692 | peer_lonesoul_or_not(peer, set); | |
1693 | if (peer->status == Established) | |
1694 | bgp_announce_route_all(peer); | |
1695 | } | |
1696 | } | |
1697 | return 0; | |
3f9c7369 DS |
1698 | } |
1699 | ||
1700 | /* | |
1701 | * update_subgroup_rib | |
1702 | */ | |
d62a17ae | 1703 | struct bgp_table *update_subgroup_rib(struct update_subgroup *subgrp) |
3f9c7369 | 1704 | { |
d62a17ae | 1705 | struct bgp *bgp; |
3f9c7369 | 1706 | |
d62a17ae | 1707 | bgp = SUBGRP_INST(subgrp); |
1708 | if (!bgp) | |
1709 | return NULL; | |
3f9c7369 | 1710 | |
d62a17ae | 1711 | return bgp->rib[SUBGRP_AFI(subgrp)][SUBGRP_SAFI(subgrp)]; |
3f9c7369 DS |
1712 | } |
1713 | ||
d62a17ae | 1714 | void update_group_af_walk(struct bgp *bgp, afi_t afi, safi_t safi, |
1715 | updgrp_walkcb cb, void *ctx) | |
3f9c7369 | 1716 | { |
d62a17ae | 1717 | struct updwalk_context wctx; |
1718 | int afid; | |
3f9c7369 | 1719 | |
d62a17ae | 1720 | if (!bgp) |
1721 | return; | |
1722 | afid = afindex(afi, safi); | |
1723 | if (afid >= BGP_AF_MAX) | |
1724 | return; | |
3f9c7369 | 1725 | |
d62a17ae | 1726 | memset(&wctx, 0, sizeof(wctx)); |
1727 | wctx.cb = cb; | |
1728 | wctx.context = ctx; | |
0de4848d | 1729 | |
d62a17ae | 1730 | if (bgp->update_groups[afid]) |
1731 | hash_walk(bgp->update_groups[afid], update_group_walkcb, &wctx); | |
3f9c7369 DS |
1732 | } |
1733 | ||
d62a17ae | 1734 | void update_group_walk(struct bgp *bgp, updgrp_walkcb cb, void *ctx) |
3f9c7369 | 1735 | { |
d62a17ae | 1736 | afi_t afi; |
1737 | safi_t safi; | |
3f9c7369 | 1738 | |
d62a17ae | 1739 | FOREACH_AFI_SAFI(afi, safi) |
1740 | { | |
1741 | update_group_af_walk(bgp, afi, safi, cb, ctx); | |
1742 | } | |
3f9c7369 DS |
1743 | } |
1744 | ||
d62a17ae | 1745 | void update_group_periodic_merge(struct bgp *bgp) |
3f9c7369 | 1746 | { |
d62a17ae | 1747 | char reason[] = "periodic merge check"; |
3f9c7369 | 1748 | |
d62a17ae | 1749 | update_group_walk(bgp, update_group_periodic_merge_walkcb, |
1750 | (void *)reason); | |
3f9c7369 DS |
1751 | } |
1752 | ||
0de4848d DS |
1753 | static int |
1754 | update_group_default_originate_route_map_walkcb(struct update_group *updgrp, | |
d62a17ae | 1755 | void *arg) |
0de4848d | 1756 | { |
d62a17ae | 1757 | struct update_subgroup *subgrp; |
1758 | struct peer *peer; | |
1759 | afi_t afi; | |
1760 | safi_t safi; | |
1761 | ||
1762 | UPDGRP_FOREACH_SUBGRP(updgrp, subgrp) | |
1763 | { | |
1764 | peer = SUBGRP_PEER(subgrp); | |
1765 | afi = SUBGRP_AFI(subgrp); | |
1766 | safi = SUBGRP_SAFI(subgrp); | |
1767 | ||
1768 | if (peer->default_rmap[afi][safi].name) { | |
1769 | subgroup_default_originate(subgrp, 0); | |
1770 | } | |
1771 | } | |
1772 | ||
1773 | return UPDWALK_CONTINUE; | |
0de4848d DS |
1774 | } |
1775 | ||
d62a17ae | 1776 | int update_group_refresh_default_originate_route_map(struct thread *thread) |
0de4848d | 1777 | { |
d62a17ae | 1778 | struct bgp *bgp; |
1779 | char reason[] = "refresh default-originate route-map"; | |
0de4848d | 1780 | |
d62a17ae | 1781 | bgp = THREAD_ARG(thread); |
1782 | update_group_walk(bgp, update_group_default_originate_route_map_walkcb, | |
1783 | reason); | |
1784 | THREAD_TIMER_OFF(bgp->t_rmap_def_originate_eval); | |
1785 | bgp_unlock(bgp); | |
ffd0c037 | 1786 | |
d62a17ae | 1787 | return (0); |
0de4848d DS |
1788 | } |
1789 | ||
3f9c7369 DS |
1790 | /* |
1791 | * peer_af_announce_route | |
1792 | * | |
1793 | * Refreshes routes out to a peer_af immediately. | |
1794 | * | |
1795 | * If the combine parameter is TRUE, then this function will try to | |
1796 | * gather other peers in the subgroup for which a route announcement | |
1797 | * is pending and efficently announce routes to all of them. | |
1798 | * | |
1799 | * For now, the 'combine' option has an effect only if all peers in | |
1800 | * the subgroup have a route announcement pending. | |
1801 | */ | |
d62a17ae | 1802 | void peer_af_announce_route(struct peer_af *paf, int combine) |
3f9c7369 | 1803 | { |
d62a17ae | 1804 | struct update_subgroup *subgrp; |
1805 | struct peer_af *cur_paf; | |
1806 | int all_pending; | |
1807 | ||
1808 | subgrp = paf->subgroup; | |
1809 | all_pending = 0; | |
1810 | ||
1811 | if (combine) { | |
1812 | /* | |
1813 | * If there are other peers in the old subgroup that also need | |
1814 | * routes to be announced, pull them into the peer's new | |
1815 | * subgroup. | |
1816 | * Combine route announcement with other peers if possible. | |
1817 | * | |
1818 | * For now, we combine only if all peers in the subgroup have an | |
1819 | * announcement pending. | |
1820 | */ | |
1821 | all_pending = 1; | |
1822 | ||
1823 | SUBGRP_FOREACH_PEER(subgrp, cur_paf) | |
1824 | { | |
1825 | if (cur_paf == paf) | |
1826 | continue; | |
1827 | ||
1828 | if (cur_paf->t_announce_route) | |
1829 | continue; | |
1830 | ||
1831 | all_pending = 0; | |
1832 | break; | |
1833 | } | |
1834 | } | |
1835 | /* | |
1836 | * Announce to the peer alone if we were not asked to combine peers, | |
1837 | * or if some peers don't have a route annoucement pending. | |
1838 | */ | |
1839 | if (!combine || !all_pending) { | |
1840 | update_subgroup_split_peer(paf, NULL); | |
1841 | if (!paf->subgroup) | |
1842 | return; | |
1843 | ||
1844 | if (bgp_debug_update(paf->peer, NULL, subgrp->update_group, 0)) | |
1845 | zlog_debug("u%" PRIu64 ":s%" PRIu64 | |
1846 | " %s announcing routes", | |
1847 | subgrp->update_group->id, subgrp->id, | |
1848 | paf->peer->host); | |
1849 | ||
1850 | subgroup_announce_route(paf->subgroup); | |
1851 | return; | |
3f9c7369 | 1852 | } |
3f9c7369 | 1853 | |
d62a17ae | 1854 | /* |
1855 | * We will announce routes the entire subgroup. | |
1856 | * | |
1857 | * First stop refresh timers on all the other peers. | |
1858 | */ | |
1859 | SUBGRP_FOREACH_PEER(subgrp, cur_paf) | |
1860 | { | |
1861 | if (cur_paf == paf) | |
1862 | continue; | |
3f9c7369 | 1863 | |
d62a17ae | 1864 | bgp_stop_announce_route_timer(cur_paf); |
1865 | } | |
3f9c7369 | 1866 | |
d62a17ae | 1867 | if (bgp_debug_update(paf->peer, NULL, subgrp->update_group, 0)) |
1868 | zlog_debug("u%" PRIu64 ":s%" PRIu64 | |
1869 | " announcing routes to %s, combined into %d peers", | |
1870 | subgrp->update_group->id, subgrp->id, | |
1871 | paf->peer->host, subgrp->peer_count); | |
3f9c7369 | 1872 | |
d62a17ae | 1873 | subgroup_announce_route(subgrp); |
3f9c7369 | 1874 | |
d62a17ae | 1875 | SUBGRP_INCR_STAT_BY(subgrp, peer_refreshes_combined, |
1876 | subgrp->peer_count - 1); | |
3f9c7369 DS |
1877 | } |
1878 | ||
d62a17ae | 1879 | void subgroup_trigger_write(struct update_subgroup *subgrp) |
3f9c7369 | 1880 | { |
d62a17ae | 1881 | struct peer_af *paf; |
3f9c7369 DS |
1882 | |
1883 | #if 0 | |
1884 | if (bgp_debug_update(NULL, NULL, subgrp->update_group, 0)) | |
1885 | zlog_debug("u%llu:s%llu scheduling write thread for peers", | |
1886 | subgrp->update_group->id, subgrp->id); | |
1887 | #endif | |
d62a17ae | 1888 | SUBGRP_FOREACH_PEER(subgrp, paf) |
1889 | { | |
1890 | if (paf->peer->status == Established) { | |
1891 | BGP_PEER_WRITE_ON(paf->peer->t_write, bgp_write, | |
1892 | paf->peer->fd, paf->peer); | |
1893 | } | |
1894 | } | |
3f9c7369 DS |
1895 | } |
1896 | ||
d62a17ae | 1897 | int update_group_clear_update_dbg(struct update_group *updgrp, void *arg) |
3f9c7369 | 1898 | { |
d62a17ae | 1899 | UPDGRP_PEER_DBG_OFF(updgrp); |
1900 | return UPDWALK_CONTINUE; | |
3f9c7369 | 1901 | } |
adbac85e | 1902 | |
06370dac | 1903 | /* Return true if we should addpath encode NLRI to this peer */ |
d62a17ae | 1904 | int bgp_addpath_encode_tx(struct peer *peer, afi_t afi, safi_t safi) |
adbac85e | 1905 | { |
d62a17ae | 1906 | return (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ADDPATH_AF_TX_ADV) |
1907 | && CHECK_FLAG(peer->af_cap[afi][safi], | |
1908 | PEER_CAP_ADDPATH_AF_RX_RCV)); | |
adbac85e | 1909 | } |
06370dac DW |
1910 | |
1911 | /* | |
1912 | * Return true if this is a path we should advertise due to a | |
1913 | * configured addpath-tx knob | |
1914 | */ | |
d62a17ae | 1915 | int bgp_addpath_tx_path(struct peer *peer, afi_t afi, safi_t safi, |
1916 | struct bgp_info *ri) | |
06370dac | 1917 | { |
d62a17ae | 1918 | if (CHECK_FLAG(peer->af_flags[afi][safi], |
1919 | PEER_FLAG_ADDPATH_TX_ALL_PATHS)) | |
1920 | return 1; | |
06370dac | 1921 | |
d62a17ae | 1922 | if (CHECK_FLAG(peer->af_flags[afi][safi], |
1923 | PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS) | |
1924 | && CHECK_FLAG(ri->flags, BGP_INFO_DMED_SELECTED)) | |
1925 | return 1; | |
06370dac | 1926 | |
d62a17ae | 1927 | return 0; |
06370dac | 1928 | } |