bgpd/bgp_updgrp.h

   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  *
  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
  25  */
  26
  27 #ifndef _QUAGGA_BGP_UPDGRP_H
  28 #define _QUAGGA_BGP_UPDGRP_H
  29
  30 #include "bgp_advertise.h"
  31
  32 /*
  33  * The following three heuristic constants determine how long advertisement to
  34  * a subgroup will be delayed after it is created. The intent is to allow
  35  * transient changes in peer state (primarily session establishment) to settle,
  36  * so that more peers can be grouped together and benefit from sharing
  37  * advertisement computations with the subgroup.
  38  *
  39  * These values have a very large impact on initial convergence time; any
  40  * changes should be accompanied by careful performance testing at all scales.
  41  *
  42  * The coalesce time 'C' for a new subgroup within a particular BGP instance
  43  * 'B' with total number of known peers 'P', established or not, is computed as
  44  * follows:
  45  *
  46  * C = MIN(BGP_MAX_SUBGROUP_COALESCE_TIME,
  47  *         BGP_DEFAULT_SUBGROUP_COALESCE_TIME +
  48  *         (P*BGP_PEER_ADJUST_SUBGROUP_COALESCE_TIME))
  49  */
  50 #define BGP_DEFAULT_SUBGROUP_COALESCE_TIME 1000
  51 #define BGP_MAX_SUBGROUP_COALESCE_TIME 10000
  52 #define BGP_PEER_ADJUST_SUBGROUP_COALESCE_TIME 50
  53
  54 #define PEER_UPDGRP_FLAGS                                                      \
  55         (PEER_FLAG_LOCAL_AS_NO_PREPEND | PEER_FLAG_LOCAL_AS_REPLACE_AS)
  56
  57 #define PEER_UPDGRP_AF_FLAGS                                                   \
  58         (PEER_FLAG_SEND_COMMUNITY | PEER_FLAG_SEND_EXT_COMMUNITY               \
  59          | PEER_FLAG_DEFAULT_ORIGINATE | PEER_FLAG_REFLECTOR_CLIENT            \
  60          | PEER_FLAG_RSERVER_CLIENT | PEER_FLAG_NEXTHOP_SELF                   \
  61          | PEER_FLAG_NEXTHOP_UNCHANGED | PEER_FLAG_FORCE_NEXTHOP_SELF          \
  62          | PEER_FLAG_AS_PATH_UNCHANGED | PEER_FLAG_MED_UNCHANGED               \
  63          | PEER_FLAG_NEXTHOP_LOCAL_UNCHANGED | PEER_FLAG_REMOVE_PRIVATE_AS     \
  64          | PEER_FLAG_REMOVE_PRIVATE_AS_ALL                                     \
  65          | PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE                                 \
  66          | PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE                             \
  67          | PEER_FLAG_ADDPATH_TX_ALL_PATHS                                      \
  68          | PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS | PEER_FLAG_AS_OVERRIDE)
  69
  70 #define PEER_UPDGRP_CAP_FLAGS (PEER_CAP_AS4_RCV)
  71
  72 #define PEER_UPDGRP_AF_CAP_FLAGS                                               \
  73         (PEER_CAP_ORF_PREFIX_SM_RCV | PEER_CAP_ORF_PREFIX_SM_OLD_RCV           \
  74          | PEER_CAP_ADDPATH_AF_TX_ADV | PEER_CAP_ADDPATH_AF_RX_RCV             \
  75          | PEER_CAP_ENHE_AF_NEGO)
  76
  77 typedef enum { BGP_ATTR_VEC_NH = 0, BGP_ATTR_VEC_MAX } bpacket_attr_vec_type;
  78
  79 typedef struct {
  80         u_int32_t flags;
  81         unsigned long offset;
  82 } bpacket_attr_vec;
  83
  84 #define BPKT_ATTRVEC_FLAGS_UPDATED        (1 << 0)
  85 #define BPKT_ATTRVEC_FLAGS_RMAP_NH_PEER_ADDRESS   (1 << 1)
  86 #define BPKT_ATTRVEC_FLAGS_REFLECTED (1 << 2)
  87 #define BPKT_ATTRVEC_FLAGS_RMAP_NH_UNCHANGED   (1 << 3)
  88 #define BPKT_ATTRVEC_FLAGS_RMAP_IPV4_NH_CHANGED   (1 << 4)
  89 #define BPKT_ATTRVEC_FLAGS_RMAP_IPV6_GNH_CHANGED  (1 << 5)
  90 #define BPKT_ATTRVEC_FLAGS_RMAP_IPV6_LNH_CHANGED  (1 << 6)
  91
  92 typedef struct bpacket_attr_vec_arr {
  93         bpacket_attr_vec entries[BGP_ATTR_VEC_MAX];
  94 } bpacket_attr_vec_arr;
  95
  96 struct bpacket {
  97         /* for being part of an update subgroup's message list */
  98         TAILQ_ENTRY(bpacket) pkt_train;
  99
 100         /* list of peers (well, peer_afs) that the packet needs to be sent to */
 101         LIST_HEAD(pkt_peer_list, peer_af) peers;
 102
 103         struct stream *buffer;
 104         bpacket_attr_vec_arr arr;
 105
 106         unsigned int ver;
 107 };
 108
 109 struct bpacket_queue {
 110         TAILQ_HEAD(pkt_queue, bpacket) pkts;
 111
 112 #if 0
 113   /* A dummy packet that is used to thread all peers that have
 114      completed their work */
 115   struct bpacket sentinel;
 116 #endif
 117
 118         unsigned int conf_max_count;
 119         unsigned int curr_count;
 120         unsigned int hwm_count;
 121         unsigned int max_count_reached_count;
 122 };
 123
 124 struct update_group {
 125         /* back pointer to the BGP instance */
 126         struct bgp *bgp;
 127
 128         /* list of subgroups that belong to the update group */
 129         LIST_HEAD(subgrp_list, update_subgroup) subgrps;
 130
 131         /* lazy way to store configuration common to all peers
 132            hash function will compute from this data */
 133         struct peer *conf;
 134
 135         afi_t afi;
 136         safi_t safi;
 137         int afid;
 138
 139         uint64_t id;
 140         time_t uptime;
 141
 142         u_int32_t join_events;
 143         u_int32_t prune_events;
 144         u_int32_t merge_events;
 145         u_int32_t updgrp_switch_events;
 146         u_int32_t peer_refreshes_combined;
 147         u_int32_t adj_count;
 148         u_int32_t split_events;
 149         u_int32_t merge_checks_triggered;
 150
 151         u_int32_t subgrps_created;
 152         u_int32_t subgrps_deleted;
 153
 154         u_int32_t num_dbg_en_peers;
 155 };
 156
 157 /*
 158  * Shorthand for a global statistics counter.
 159  */
 160 #define UPDGRP_GLOBAL_STAT(updgrp, stat)                                       \
 161         ((updgrp)->bgp->update_group_stats.stat)
 162
 163 /*
 164  * Add the given value to a counter on an update group and the bgp
 165  * instance.
 166  */
 167 #define UPDGRP_INCR_STAT_BY(updgrp, stat, value)                               \
 168         do {                                                                   \
 169                 (updgrp)->stat += (value);                                     \
 170                 UPDGRP_GLOBAL_STAT(updgrp, stat) += (value);                   \
 171         } while (0)
 172
 173 /*
 174  * Increment a counter on a update group and its parent structures.
 175  */
 176 #define UPDGRP_INCR_STAT(subgrp, stat) UPDGRP_INCR_STAT_BY(subgrp, stat, 1)
 177
 178 struct update_subgroup {
 179         /* back pointer to the parent update group */
 180         struct update_group *update_group;
 181
 182         /* list of peers that belong to the subgroup */
 183         LIST_HEAD(peer_list, peer_af) peers;
 184         int peer_count;
 185
 186         /* for being part of an update group's subgroup list */
 187         LIST_ENTRY(update_subgroup) updgrp_train;
 188
 189         struct bpacket_queue pkt_queue;
 190
 191         /*
 192          * List of adj-out structures for this subgroup.
 193          * It essentially represents the snapshot of every prefix that
 194          * has been advertised to the members of the subgroup
 195          */
 196         TAILQ_HEAD(adjout_queue, bgp_adj_out) adjq;
 197
 198         /* packet buffer for update generation */
 199         struct stream *work;
 200
 201         /* We use a separate stream to encode MP_REACH_NLRI for efficient
 202          * NLRI packing. peer->obuf_work stores all the other attributes. The
 203          * actual packet is then constructed by concatenating the two.
 204          */
 205         struct stream *scratch;
 206
 207         /* synchronization list and time */
 208         struct bgp_synchronize *sync;
 209
 210         /* send prefix count */
 211         unsigned long scount;
 212
 213         /* announcement attribute hash */
 214         struct hash *hash;
 215
 216         struct thread *t_coalesce;
 217         u_int32_t v_coalesce;
 218
 219         struct thread *t_merge_check;
 220
 221         /* table version that the subgroup has caught up to. */
 222         uint64_t version;
 223
 224         /* version maintained to record adj changes */
 225         uint64_t adj_version;
 226
 227         time_t uptime;
 228
 229         /*
 230          * Identifying information about the subgroup that this subgroup was
 231          * split
 232          * from, if any.
 233          */
 234         struct {
 235                 uint64_t update_group_id;
 236                 uint64_t subgroup_id;
 237         } split_from;
 238
 239         u_int32_t join_events;
 240         u_int32_t prune_events;
 241
 242         /*
 243          * This is bumped up when another subgroup merges into this one.
 244          */
 245         u_int32_t merge_events;
 246         u_int32_t updgrp_switch_events;
 247         u_int32_t peer_refreshes_combined;
 248         u_int32_t adj_count;
 249         u_int32_t split_events;
 250         u_int32_t merge_checks_triggered;
 251
 252         uint64_t id;
 253
 254         u_int16_t sflags;
 255
 256         /* Subgroup flags, see below  */
 257         u_int16_t flags;
 258 };
 259
 260 /*
 261  * We need to do an outbound refresh to get this subgroup into a
 262  * consistent state.
 263  */
 264 #define SUBGRP_FLAG_NEEDS_REFRESH         (1 << 0)
 265
 266 #define SUBGRP_STATUS_DEFAULT_ORIGINATE   (1 << 0)
 267
 268 /*
 269  * Add the given value to the specified counter on a subgroup and its
 270  * parent structures.
 271  */
 272 #define SUBGRP_INCR_STAT_BY(subgrp, stat, value)                               \
 273         do {                                                                   \
 274                 (subgrp)->stat += (value);                                     \
 275                 if ((subgrp)->update_group)                                    \
 276                         UPDGRP_INCR_STAT_BY((subgrp)->update_group, stat,      \
 277                                             value);                            \
 278         } while (0)
 279
 280 /*
 281  * Increment a counter on a subgroup and its parent structures.
 282  */
 283 #define SUBGRP_INCR_STAT(subgrp, stat) SUBGRP_INCR_STAT_BY(subgrp, stat, 1)
 284
 285 /*
 286  * Decrement a counter on a subgroup and its parent structures.
 287  */
 288 #define SUBGRP_DECR_STAT(subgrp, stat) SUBGRP_INCR_STAT_BY(subgrp, stat, -1)
 289
 290
 291 typedef int (*updgrp_walkcb)(struct update_group *updgrp, void *ctx);
 292
 293 /* really a private structure */
 294 struct updwalk_context {
 295         struct vty *vty;
 296         struct bgp_node *rn;
 297         struct bgp_info *ri;
 298         uint64_t updgrp_id;
 299         uint64_t subgrp_id;
 300         bgp_policy_type_e policy_type;
 301         const char *policy_name;
 302         int policy_event_start_flag;
 303         int policy_route_update;
 304         updgrp_walkcb cb;
 305         void *context;
 306         u_int8_t flags;
 307
 308 #define UPDWALK_FLAGS_ADVQUEUE   (1 << 0)
 309 #define UPDWALK_FLAGS_ADVERTISED (1 << 1)
 310 };
 311
 312 #define UPDWALK_CONTINUE HASHWALK_CONTINUE
 313 #define UPDWALK_ABORT HASHWALK_ABORT
 314
 315 #define PAF_PEER(p)        ((p)->peer)
 316 #define PAF_SUBGRP(p)      ((p)->subgroup)
 317 #define PAF_UPDGRP(p)      ((p)->subgroup->update_group)
 318 #define PAF_PKTQ(f)        SUBGRP_PKTQ((f)->subgroup)
 319
 320 #define UPDGRP_PEER(u)     ((u)->conf)
 321 #define UPDGRP_AFI(u)      ((u)->afi)
 322 #define UPDGRP_SAFI(u)     ((u)->safi)
 323 #define UPDGRP_INST(u)     ((u)->bgp)
 324 #define UPDGRP_AFFLAGS(u) ((u)->conf->af_flags[UPDGRP_AFI(u)][UPDGRP_SAFI(u)])
 325 #define UPDGRP_DBG_ON(u)   ((u)->num_dbg_en_peers)
 326 #define UPDGRP_PEER_DBG_EN(u)  (((u)->num_dbg_en_peers)++)
 327 #define UPDGRP_PEER_DBG_DIS(u) (((u)->num_dbg_en_peers)--)
 328 #define UPDGRP_PEER_DBG_OFF(u) (u)->num_dbg_en_peers = 0
 329
 330 #define SUBGRP_AFI(s)      UPDGRP_AFI((s)->update_group)
 331 #define SUBGRP_SAFI(s)     UPDGRP_SAFI((s)->update_group)
 332 #define SUBGRP_PEER(s)     UPDGRP_PEER((s)->update_group)
 333 #define SUBGRP_PCOUNT(s)   ((s)->peer_count)
 334 #define SUBGRP_PFIRST(s)   LIST_FIRST(&((s)->peers))
 335 #define SUBGRP_PKTQ(s)     &((s)->pkt_queue)
 336 #define SUBGRP_INST(s)     UPDGRP_INST((s)->update_group)
 337 #define SUBGRP_AFFLAGS(s)  UPDGRP_AFFLAGS((s)->update_group)
 338 #define SUBGRP_UPDGRP(s)   ((s)->update_group)
 339
 340 /*
 341  * Walk all subgroups in an update group.
 342  */
 343 #define UPDGRP_FOREACH_SUBGRP(updgrp, subgrp)                                  \
 344         LIST_FOREACH(subgrp, &((updgrp)->subgrps), updgrp_train)
 345
 346 #define UPDGRP_FOREACH_SUBGRP_SAFE(updgrp, subgrp, tmp_subgrp)                 \
 347         LIST_FOREACH_SAFE(subgrp, &((updgrp)->subgrps), updgrp_train,          \
 348                           tmp_subgrp)
 349
 350 #define SUBGRP_FOREACH_PEER(subgrp, paf)                                       \
 351         LIST_FOREACH(paf, &(subgrp->peers), subgrp_train)
 352
 353 #define SUBGRP_FOREACH_PEER_SAFE(subgrp, paf, temp_paf)                        \
 354         LIST_FOREACH_SAFE(paf, &(subgrp->peers), subgrp_train, temp_paf)
 355
 356 #define SUBGRP_FOREACH_ADJ(subgrp, adj)                                        \
 357         TAILQ_FOREACH(adj, &(subgrp->adjq), subgrp_adj_train)
 358
 359 #define SUBGRP_FOREACH_ADJ_SAFE(subgrp, adj, adj_temp)                         \
 360         TAILQ_FOREACH_SAFE(adj, &(subgrp->adjq), subgrp_adj_train, adj_temp)
 361
 362 /* Prototypes.  */
 363 /* bgp_updgrp.c */
 364 extern void update_bgp_group_init(struct bgp *);
 365 extern void udpate_bgp_group_free(struct bgp *);
 366
 367 extern void update_group_show(struct bgp *bgp, afi_t afi, safi_t safi,
 368                               struct vty *vty, uint64_t subgrp_id);
 369 extern void update_group_show_stats(struct bgp *bgp, struct vty *vty);
 370 extern void update_group_adjust_peer(struct peer_af *paf);
 371 extern int update_group_adjust_soloness(struct peer *peer, int set);
 372
 373 extern void update_subgroup_remove_peer(struct update_subgroup *,
 374                                         struct peer_af *);
 375 extern struct bgp_table *update_subgroup_rib(struct update_subgroup *);
 376 extern void update_subgroup_split_peer(struct peer_af *, struct update_group *);
 377 extern int update_subgroup_check_merge(struct update_subgroup *, const char *);
 378 extern int update_subgroup_trigger_merge_check(struct update_subgroup *,
 379                                                int force);
 380 extern void update_group_policy_update(struct bgp *bgp, bgp_policy_type_e ptype,
 381                                        const char *pname, int route_update,
 382                                        int start_event);
 383 extern void update_group_af_walk(struct bgp *bgp, afi_t afi, safi_t safi,
 384                                  updgrp_walkcb cb, void *ctx);
 385 extern void update_group_walk(struct bgp *bgp, updgrp_walkcb cb, void *ctx);
 386 extern void update_group_periodic_merge(struct bgp *bgp);
 387 extern int
 388 update_group_refresh_default_originate_route_map(struct thread *thread);
 389 extern void update_group_start_advtimer(struct bgp *bgp);
 390
 391 extern void update_subgroup_inherit_info(struct update_subgroup *to,
 392                                          struct update_subgroup *from);
 393
 394 /* bgp_updgrp_packet.c */
 395 extern struct bpacket *bpacket_alloc(void);
 396 extern void bpacket_free(struct bpacket *pkt);
 397 extern void bpacket_queue_init(struct bpacket_queue *q);
 398 extern void bpacket_queue_cleanup(struct bpacket_queue *q);
 399 extern void bpacket_queue_sanity_check(struct bpacket_queue *q);
 400 extern struct bpacket *bpacket_queue_add(struct bpacket_queue *q,
 401                                          struct stream *s,
 402                                          struct bpacket_attr_vec_arr *vecarr);
 403 struct bpacket *bpacket_queue_remove(struct bpacket_queue *q);
 404 extern struct bpacket *bpacket_queue_first(struct bpacket_queue *q);
 405 struct bpacket *bpacket_queue_last(struct bpacket_queue *q);
 406 unsigned int bpacket_queue_length(struct bpacket_queue *q);
 407 unsigned int bpacket_queue_hwm_length(struct bpacket_queue *q);
 408 int bpacket_queue_is_full(struct bgp *bgp, struct bpacket_queue *q);
 409 extern void bpacket_queue_advance_peer(struct peer_af *paf);
 410 extern void bpacket_queue_remove_peer(struct peer_af *paf);
 411 extern void bpacket_add_peer(struct bpacket *pkt, struct peer_af *paf);
 412 unsigned int bpacket_queue_virtual_length(struct peer_af *paf);
 413 extern void bpacket_queue_show_vty(struct bpacket_queue *q, struct vty *vty);
 414 int subgroup_packets_to_build(struct update_subgroup *subgrp);
 415 extern struct bpacket *subgroup_update_packet(struct update_subgroup *s);
 416 extern struct bpacket *subgroup_withdraw_packet(struct update_subgroup *s);
 417 extern struct stream *bpacket_reformat_for_peer(struct bpacket *pkt,
 418                                                 struct peer_af *paf);
 419 extern void bpacket_attr_vec_arr_reset(struct bpacket_attr_vec_arr *vecarr);
 420 extern void bpacket_attr_vec_arr_set_vec(struct bpacket_attr_vec_arr *vecarr,
 421                                          bpacket_attr_vec_type type,
 422                                          struct stream *s, struct attr *attr);
 423 extern void subgroup_default_update_packet(struct update_subgroup *subgrp,
 424                                            struct attr *attr,
 425                                            struct peer *from);
 426 extern void subgroup_default_withdraw_packet(struct update_subgroup *subgrp);
 427
 428 /* bgp_updgrp_adv.c */
 429 extern struct bgp_advertise *
 430 bgp_advertise_clean_subgroup(struct update_subgroup *subgrp,
 431                              struct bgp_adj_out *adj);
 432 extern void update_group_show_adj_queue(struct bgp *bgp, afi_t afi, safi_t safi,
 433                                         struct vty *vty, uint64_t id);
 434 extern void update_group_show_advertised(struct bgp *bgp, afi_t afi,
 435                                          safi_t safi, struct vty *vty,
 436                                          uint64_t id);
 437 extern void update_group_show_packet_queue(struct bgp *bgp, afi_t afi,
 438                                            safi_t safi, struct vty *vty,
 439                                            uint64_t id);
 440 extern void subgroup_announce_route(struct update_subgroup *subgrp);
 441 extern void subgroup_announce_all(struct update_subgroup *subgrp);
 442
 443 extern void subgroup_default_originate(struct update_subgroup *subgrp,
 444                                        int withdraw);
 445 extern void group_announce_route(struct bgp *bgp, afi_t afi, safi_t safi,
 446                                  struct bgp_node *rn, struct bgp_info *ri);
 447 extern void subgroup_clear_table(struct update_subgroup *subgrp);
 448 extern void update_group_announce(struct bgp *bgp);
 449 extern void update_group_announce_rrclients(struct bgp *bgp);
 450 extern void peer_af_announce_route(struct peer_af *paf, int combine);
 451 extern struct bgp_adj_out *bgp_adj_out_alloc(struct update_subgroup *subgrp,
 452                                              struct bgp_node *rn,
 453                                              u_int32_t addpath_tx_id);
 454 extern void bgp_adj_out_remove_subgroup(struct bgp_node *rn,
 455                                         struct bgp_adj_out *adj,
 456                                         struct update_subgroup *subgrp);
 457 extern void bgp_adj_out_set_subgroup(struct bgp_node *rn,
 458                                      struct update_subgroup *subgrp,
 459                                      struct attr *attr, struct bgp_info *binfo);
 460 extern void bgp_adj_out_unset_subgroup(struct bgp_node *rn,
 461                                        struct update_subgroup *subgrp,
 462                                        char withdraw, u_int32_t addpath_tx_id);
 463 void subgroup_announce_table(struct update_subgroup *subgrp,
 464                              struct bgp_table *table);
 465 extern void subgroup_trigger_write(struct update_subgroup *subgrp);
 466
 467 extern int update_group_clear_update_dbg(struct update_group *updgrp,
 468                                          void *arg);
 469
 470 extern void update_bgp_group_free(struct bgp *bgp);
 471 extern int bgp_addpath_encode_tx(struct peer *peer, afi_t afi, safi_t safi);
 472 extern int bgp_addpath_tx_path(struct peer *peer, afi_t afi, safi_t safi,
 473                                struct bgp_info *ri);
 474
 475 /*
 476  * Inline functions
 477  */
 478
 479 /*
 480  * bpacket_queue_is_empty
 481  */
 482 static inline int bpacket_queue_is_empty(struct bpacket_queue *queue)
 483 {
 484
 485         /*
 486          * The packet queue is empty if it only contains a sentinel.
 487          */
 488         if (queue->curr_count != 1)
 489                 return 0;
 490
 491         assert(bpacket_queue_first(queue)->buffer == NULL);
 492         return 1;
 493 }
 494
 495 /*
 496  * bpacket_next
 497  *
 498  * Returns the packet after the given packet in a bpacket queue.
 499  */
 500 static inline struct bpacket *bpacket_next(struct bpacket *pkt)
 501 {
 502         return TAILQ_NEXT(pkt, pkt_train);
 503 }
 504
 505 /*
 506  * update_group_adjust_peer_afs
 507  *
 508  * Adjust all peer_af structures for the given peer.
 509  */
 510 static inline void update_group_adjust_peer_afs(struct peer *peer)
 511 {
 512         struct peer_af *paf;
 513         int afidx;
 514
 515         for (afidx = BGP_AF_START; afidx < BGP_AF_MAX; afidx++) {
 516                 paf = peer->peer_af_array[afidx];
 517                 if (paf != NULL)
 518                         update_group_adjust_peer(paf);
 519         }
 520 }
 521
 522 /*
 523  * update_group_remove_peer_afs
 524  *
 525  * Remove all peer_af structures for the given peer from their subgroups.
 526  */
 527 static inline void update_group_remove_peer_afs(struct peer *peer)
 528 {
 529         struct peer_af *paf;
 530         int afidx;
 531
 532         for (afidx = BGP_AF_START; afidx < BGP_AF_MAX; afidx++) {
 533                 paf = peer->peer_af_array[afidx];
 534                 if (paf != NULL)
 535                         update_subgroup_remove_peer(PAF_SUBGRP(paf), paf);
 536         }
 537 }
 538
 539 /*
 540  * update_subgroup_needs_refresh
 541  */
 542 static inline int
 543 update_subgroup_needs_refresh(const struct update_subgroup *subgrp)
 544 {
 545         if (CHECK_FLAG(subgrp->flags, SUBGRP_FLAG_NEEDS_REFRESH))
 546                 return 1;
 547         else
 548                 return 0;
 549 }
 550
 551 /*
 552  * update_subgroup_set_needs_refresh
 553  */
 554 static inline void
 555 update_subgroup_set_needs_refresh(struct update_subgroup *subgrp, int value)
 556 {
 557         if (value)
 558                 SET_FLAG(subgrp->flags, SUBGRP_FLAG_NEEDS_REFRESH);
 559         else
 560                 UNSET_FLAG(subgrp->flags, SUBGRP_FLAG_NEEDS_REFRESH);
 561 }
 562
 563 static inline struct update_subgroup *peer_subgroup(struct peer *peer,
 564                                                     afi_t afi, safi_t safi)
 565 {
 566         struct peer_af *paf;
 567
 568         paf = peer_af_find(peer, afi, safi);
 569         if (paf)
 570                 return PAF_SUBGRP(paf);
 571         return NULL;
 572 }
 573
 574 /*
 575  * update_group_adjust_peer_afs
 576  *
 577  * Adjust all peer_af structures for the given peer.
 578  */
 579 static inline void bgp_announce_peer(struct peer *peer)
 580 {
 581         struct peer_af *paf;
 582         int afidx;
 583
 584         for (afidx = BGP_AF_START; afidx < BGP_AF_MAX; afidx++) {
 585                 paf = peer->peer_af_array[afidx];
 586                 if (paf != NULL)
 587                         subgroup_announce_all(PAF_SUBGRP(paf));
 588         }
 589 }
 590
 591 /**
 592  * advertise_list_is_empty
 593  */
 594 static inline int advertise_list_is_empty(struct update_subgroup *subgrp)
 595 {
 596         if (!BGP_ADV_FIFO_EMPTY(&subgrp->sync->update)
 597             || !BGP_ADV_FIFO_EMPTY(&subgrp->sync->withdraw)
 598             || !BGP_ADV_FIFO_EMPTY(&subgrp->sync->withdraw_low)) {
 599                 return 0;
 600         }
 601
 602         return 1;
 603 }
 604
 605 #endif /* _QUAGGA_BGP_UPDGRP_H */