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
  23  * along with GNU Zebra; see the file COPYING.  If not, write to the Free
  24  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  25  * 02111-1307, USA.
  26  */
  27
  28 #ifndef _QUAGGA_BGP_UPDGRP_H
  29 #define _QUAGGA_BGP_UPDGRP_H
  30
  31 #include "bgp_advertise.h"
  32
  33 #define BGP_DEFAULT_SUBGROUP_COALESCE_TIME 200
  34
  35 #define PEER_UPDGRP_FLAGS                                                      \
  36         (PEER_FLAG_LOCAL_AS_NO_PREPEND | PEER_FLAG_LOCAL_AS_REPLACE_AS)
  37
  38 #define PEER_UPDGRP_AF_FLAGS                                                   \
  39         (PEER_FLAG_SEND_COMMUNITY | PEER_FLAG_SEND_EXT_COMMUNITY               \
  40          | PEER_FLAG_DEFAULT_ORIGINATE | PEER_FLAG_REFLECTOR_CLIENT            \
  41          | PEER_FLAG_RSERVER_CLIENT | PEER_FLAG_NEXTHOP_SELF                   \
  42          | PEER_FLAG_NEXTHOP_UNCHANGED | PEER_FLAG_FORCE_NEXTHOP_SELF          \
  43          | PEER_FLAG_AS_PATH_UNCHANGED | PEER_FLAG_MED_UNCHANGED               \
  44          | PEER_FLAG_NEXTHOP_LOCAL_UNCHANGED | PEER_FLAG_REMOVE_PRIVATE_AS     \
  45          | PEER_FLAG_REMOVE_PRIVATE_AS_ALL                                     \
  46          | PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE                                 \
  47          | PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE                             \
  48          | PEER_FLAG_ADDPATH_TX_ALL_PATHS                                      \
  49          | PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS | PEER_FLAG_AS_OVERRIDE)
  50
  51 #define PEER_UPDGRP_CAP_FLAGS (PEER_CAP_AS4_RCV)
  52
  53 #define PEER_UPDGRP_AF_CAP_FLAGS                                               \
  54         (PEER_CAP_ORF_PREFIX_SM_RCV | PEER_CAP_ORF_PREFIX_SM_OLD_RCV           \
  55          | PEER_CAP_ADDPATH_AF_TX_ADV | PEER_CAP_ADDPATH_AF_RX_RCV             \
  56          | PEER_CAP_ENHE_AF_NEGO)
  57
  58 typedef enum { BGP_ATTR_VEC_NH = 0, BGP_ATTR_VEC_MAX } bpacket_attr_vec_type;
  59
  60 typedef struct {
  61         u_int32_t flags;
  62         unsigned long offset;
  63 } bpacket_attr_vec;
  64
  65 #define BPKT_ATTRVEC_FLAGS_UPDATED        (1 << 0)
  66 #define BPKT_ATTRVEC_FLAGS_RMAP_NH_PEER_ADDRESS   (1 << 1)
  67 #define BPKT_ATTRVEC_FLAGS_REFLECTED (1 << 2)
  68 #define BPKT_ATTRVEC_FLAGS_RMAP_NH_UNCHANGED   (1 << 3)
  69 #define BPKT_ATTRVEC_FLAGS_RMAP_IPV4_NH_CHANGED   (1 << 4)
  70 #define BPKT_ATTRVEC_FLAGS_RMAP_IPV6_GNH_CHANGED  (1 << 5)
  71 #define BPKT_ATTRVEC_FLAGS_RMAP_IPV6_LNH_CHANGED  (1 << 6)
  72
  73 typedef struct bpacket_attr_vec_arr {
  74         bpacket_attr_vec entries[BGP_ATTR_VEC_MAX];
  75 } bpacket_attr_vec_arr;
  76
  77 struct bpacket {
  78         /* for being part of an update subgroup's message list */
  79         TAILQ_ENTRY(bpacket) pkt_train;
  80
  81         /* list of peers (well, peer_afs) that the packet needs to be sent to */
  82         LIST_HEAD(pkt_peer_list, peer_af) peers;
  83
  84         struct stream *buffer;
  85         bpacket_attr_vec_arr arr;
  86
  87         unsigned int ver;
  88 };
  89
  90 struct bpacket_queue {
  91         TAILQ_HEAD(pkt_queue, bpacket) pkts;
  92
  93 #if 0
  94   /* A dummy packet that is used to thread all peers that have
  95      completed their work */
  96   struct bpacket sentinel;
  97 #endif
  98
  99         unsigned int conf_max_count;
 100         unsigned int curr_count;
 101         unsigned int hwm_count;
 102         unsigned int max_count_reached_count;
 103 };
 104
 105 struct update_group {
 106         /* back pointer to the BGP instance */
 107         struct bgp *bgp;
 108
 109         /* list of subgroups that belong to the update group */
 110         LIST_HEAD(subgrp_list, update_subgroup) subgrps;
 111
 112         /* lazy way to store configuration common to all peers
 113            hash function will compute from this data */
 114         struct peer *conf;
 115
 116         afi_t afi;
 117         safi_t safi;
 118         int afid;
 119
 120         uint64_t id;
 121         time_t uptime;
 122
 123         u_int32_t join_events;
 124         u_int32_t prune_events;
 125         u_int32_t merge_events;
 126         u_int32_t updgrp_switch_events;
 127         u_int32_t peer_refreshes_combined;
 128         u_int32_t adj_count;
 129         u_int32_t split_events;
 130         u_int32_t merge_checks_triggered;
 131
 132         u_int32_t subgrps_created;
 133         u_int32_t subgrps_deleted;
 134
 135         u_int32_t num_dbg_en_peers;
 136 };
 137
 138 /*
 139  * Shorthand for a global statistics counter.
 140  */
 141 #define UPDGRP_GLOBAL_STAT(updgrp, stat)                                       \
 142         ((updgrp)->bgp->update_group_stats.stat)
 143
 144 /*
 145  * Add the given value to a counter on an update group and the bgp
 146  * instance.
 147  */
 148 #define UPDGRP_INCR_STAT_BY(updgrp, stat, value)                               \
 149         do {                                                                   \
 150                 (updgrp)->stat += (value);                                     \
 151                 UPDGRP_GLOBAL_STAT(updgrp, stat) += (value);                   \
 152         } while (0)
 153
 154 /*
 155  * Increment a counter on a update group and its parent structures.
 156  */
 157 #define UPDGRP_INCR_STAT(subgrp, stat) UPDGRP_INCR_STAT_BY(subgrp, stat, 1)
 158
 159 struct update_subgroup {
 160         /* back pointer to the parent update group */
 161         struct update_group *update_group;
 162
 163         /* list of peers that belong to the subgroup */
 164         LIST_HEAD(peer_list, peer_af) peers;
 165         int peer_count;
 166
 167         /* for being part of an update group's subgroup list */
 168         LIST_ENTRY(update_subgroup) updgrp_train;
 169
 170         struct bpacket_queue pkt_queue;
 171
 172         /*
 173          * List of adj-out structures for this subgroup.
 174          * It essentially represents the snapshot of every prefix that
 175          * has been advertised to the members of the subgroup
 176          */
 177         TAILQ_HEAD(adjout_queue, bgp_adj_out) adjq;
 178
 179         /* packet buffer for update generation */
 180         struct stream *work;
 181
 182         /* We use a separate stream to encode MP_REACH_NLRI for efficient
 183          * NLRI packing. peer->work stores all the other attributes. The
 184          * actual packet is then constructed by concatenating the two.
 185          */
 186         struct stream *scratch;
 187
 188         /* synchronization list and time */
 189         struct bgp_synchronize *sync;
 190
 191         /* send prefix count */
 192         unsigned long scount;
 193
 194         /* announcement attribute hash */
 195         struct hash *hash;
 196
 197         struct thread *t_coalesce;
 198         u_int32_t v_coalesce;
 199
 200         struct thread *t_merge_check;
 201
 202         /* table version that the subgroup has caught up to. */
 203         uint64_t version;
 204
 205         /* version maintained to record adj changes */
 206         uint64_t adj_version;
 207
 208         time_t uptime;
 209
 210         /*
 211          * Identifying information about the subgroup that this subgroup was
 212          * split
 213          * from, if any.
 214          */
 215         struct {
 216                 uint64_t update_group_id;
 217                 uint64_t subgroup_id;
 218         } split_from;
 219
 220         u_int32_t join_events;
 221         u_int32_t prune_events;
 222
 223         /*
 224          * This is bumped up when another subgroup merges into this one.
 225          */
 226         u_int32_t merge_events;
 227         u_int32_t updgrp_switch_events;
 228         u_int32_t peer_refreshes_combined;
 229         u_int32_t adj_count;
 230         u_int32_t split_events;
 231         u_int32_t merge_checks_triggered;
 232
 233         uint64_t id;
 234
 235         u_int16_t sflags;
 236
 237         /* Subgroup flags, see below  */
 238         u_int16_t flags;
 239 };
 240
 241 /*
 242  * We need to do an outbound refresh to get this subgroup into a
 243  * consistent state.
 244  */
 245 #define SUBGRP_FLAG_NEEDS_REFRESH         (1 << 0)
 246
 247 #define SUBGRP_STATUS_DEFAULT_ORIGINATE   (1 << 0)
 248
 249 /*
 250  * Add the given value to the specified counter on a subgroup and its
 251  * parent structures.
 252  */
 253 #define SUBGRP_INCR_STAT_BY(subgrp, stat, value)                               \
 254         do {                                                                   \
 255                 (subgrp)->stat += (value);                                     \
 256                 if ((subgrp)->update_group)                                    \
 257                         UPDGRP_INCR_STAT_BY((subgrp)->update_group, stat,      \
 258                                             value);                            \
 259         } while (0)
 260
 261 /*
 262  * Increment a counter on a subgroup and its parent structures.
 263  */
 264 #define SUBGRP_INCR_STAT(subgrp, stat) SUBGRP_INCR_STAT_BY(subgrp, stat, 1)
 265
 266 /*
 267  * Decrement a counter on a subgroup and its parent structures.
 268  */
 269 #define SUBGRP_DECR_STAT(subgrp, stat) SUBGRP_INCR_STAT_BY(subgrp, stat, -1)
 270
 271
 272 typedef int (*updgrp_walkcb)(struct update_group *updgrp, void *ctx);
 273
 274 /* really a private structure */
 275 struct updwalk_context {
 276         struct vty *vty;
 277         struct bgp_node *rn;
 278         struct bgp_info *ri;
 279         uint64_t updgrp_id;
 280         uint64_t subgrp_id;
 281         bgp_policy_type_e policy_type;
 282         const char *policy_name;
 283         int policy_event_start_flag;
 284         int policy_route_update;
 285         updgrp_walkcb cb;
 286         void *context;
 287         u_int8_t flags;
 288
 289 #define UPDWALK_FLAGS_ADVQUEUE   (1 << 0)
 290 #define UPDWALK_FLAGS_ADVERTISED (1 << 1)
 291 };
 292
 293 #define UPDWALK_CONTINUE HASHWALK_CONTINUE
 294 #define UPDWALK_ABORT HASHWALK_ABORT
 295
 296 #define PAF_PEER(p)        ((p)->peer)
 297 #define PAF_SUBGRP(p)      ((p)->subgroup)
 298 #define PAF_UPDGRP(p)      ((p)->subgroup->update_group)
 299 #define PAF_PKTQ(f)        SUBGRP_PKTQ((f)->subgroup)
 300
 301 #define UPDGRP_PEER(u)     ((u)->conf)
 302 #define UPDGRP_AFI(u)      ((u)->afi)
 303 #define UPDGRP_SAFI(u)     ((u)->safi)
 304 #define UPDGRP_INST(u)     ((u)->bgp)
 305 #define UPDGRP_AFFLAGS(u) ((u)->conf->af_flags[UPDGRP_AFI(u)][UPDGRP_SAFI(u)])
 306 #define UPDGRP_DBG_ON(u)   ((u)->num_dbg_en_peers)
 307 #define UPDGRP_PEER_DBG_EN(u)  (((u)->num_dbg_en_peers)++)
 308 #define UPDGRP_PEER_DBG_DIS(u) (((u)->num_dbg_en_peers)--)
 309 #define UPDGRP_PEER_DBG_OFF(u) (u)->num_dbg_en_peers = 0
 310
 311 #define SUBGRP_AFI(s)      UPDGRP_AFI((s)->update_group)
 312 #define SUBGRP_SAFI(s)     UPDGRP_SAFI((s)->update_group)
 313 #define SUBGRP_PEER(s)     UPDGRP_PEER((s)->update_group)
 314 #define SUBGRP_PCOUNT(s)   ((s)->peer_count)
 315 #define SUBGRP_PFIRST(s)   LIST_FIRST(&((s)->peers))
 316 #define SUBGRP_PKTQ(s)     &((s)->pkt_queue)
 317 #define SUBGRP_INST(s)     UPDGRP_INST((s)->update_group)
 318 #define SUBGRP_AFFLAGS(s)  UPDGRP_AFFLAGS((s)->update_group)
 319 #define SUBGRP_UPDGRP(s)   ((s)->update_group)
 320
 321 /*
 322  * Walk all subgroups in an update group.
 323  */
 324 #define UPDGRP_FOREACH_SUBGRP(updgrp, subgrp)                                  \
 325         LIST_FOREACH(subgrp, &((updgrp)->subgrps), updgrp_train)
 326
 327 #define UPDGRP_FOREACH_SUBGRP_SAFE(updgrp, subgrp, tmp_subgrp)                 \
 328         LIST_FOREACH_SAFE(subgrp, &((updgrp)->subgrps), updgrp_train,          \
 329                           tmp_subgrp)
 330
 331 #define SUBGRP_FOREACH_PEER(subgrp, paf)                                       \
 332         LIST_FOREACH(paf, &(subgrp->peers), subgrp_train)
 333
 334 #define SUBGRP_FOREACH_PEER_SAFE(subgrp, paf, temp_paf)                        \
 335         LIST_FOREACH_SAFE(paf, &(subgrp->peers), subgrp_train, temp_paf)
 336
 337 #define SUBGRP_FOREACH_ADJ(subgrp, adj)                                        \
 338         TAILQ_FOREACH(adj, &(subgrp->adjq), subgrp_adj_train)
 339
 340 #define SUBGRP_FOREACH_ADJ_SAFE(subgrp, adj, adj_temp)                         \
 341         TAILQ_FOREACH_SAFE(adj, &(subgrp->adjq), subgrp_adj_train, adj_temp)
 342
 343 /* Prototypes.  */
 344 /* bgp_updgrp.c */
 345 extern void update_bgp_group_init(struct bgp *);
 346 extern void udpate_bgp_group_free(struct bgp *);
 347
 348 extern void update_group_show(struct bgp *bgp, afi_t afi, safi_t safi,
 349                               struct vty *vty, uint64_t subgrp_id);
 350 extern void update_group_show_stats(struct bgp *bgp, struct vty *vty);
 351 extern void update_group_adjust_peer(struct peer_af *paf);
 352 extern int update_group_adjust_soloness(struct peer *peer, int set);
 353
 354 extern void update_subgroup_remove_peer(struct update_subgroup *,
 355                                         struct peer_af *);
 356 extern struct bgp_table *update_subgroup_rib(struct update_subgroup *);
 357 extern void update_subgroup_split_peer(struct peer_af *, struct update_group *);
 358 extern int update_subgroup_check_merge(struct update_subgroup *, const char *);
 359 extern int update_subgroup_trigger_merge_check(struct update_subgroup *,
 360                                                int force);
 361 extern void update_group_policy_update(struct bgp *bgp, bgp_policy_type_e ptype,
 362                                        const char *pname, int route_update,
 363                                        int start_event);
 364 extern void update_group_af_walk(struct bgp *bgp, afi_t afi, safi_t safi,
 365                                  updgrp_walkcb cb, void *ctx);
 366 extern void update_group_walk(struct bgp *bgp, updgrp_walkcb cb, void *ctx);
 367 extern void update_group_periodic_merge(struct bgp *bgp);
 368 extern int
 369 update_group_refresh_default_originate_route_map(struct thread *thread);
 370 extern void update_group_start_advtimer(struct bgp *bgp);
 371
 372 extern void update_subgroup_inherit_info(struct update_subgroup *to,
 373                                          struct update_subgroup *from);
 374
 375 /* bgp_updgrp_packet.c */
 376 extern struct bpacket *bpacket_alloc(void);
 377 extern void bpacket_free(struct bpacket *pkt);
 378 extern void bpacket_queue_init(struct bpacket_queue *q);
 379 extern void bpacket_queue_cleanup(struct bpacket_queue *q);
 380 extern void bpacket_queue_sanity_check(struct bpacket_queue *q);
 381 extern struct bpacket *bpacket_queue_add(struct bpacket_queue *q,
 382                                          struct stream *s,
 383                                          struct bpacket_attr_vec_arr *vecarr);
 384 struct bpacket *bpacket_queue_remove(struct bpacket_queue *q);
 385 extern struct bpacket *bpacket_queue_first(struct bpacket_queue *q);
 386 struct bpacket *bpacket_queue_last(struct bpacket_queue *q);
 387 unsigned int bpacket_queue_length(struct bpacket_queue *q);
 388 unsigned int bpacket_queue_hwm_length(struct bpacket_queue *q);
 389 int bpacket_queue_is_full(struct bgp *bgp, struct bpacket_queue *q);
 390 extern void bpacket_queue_advance_peer(struct peer_af *paf);
 391 extern void bpacket_queue_remove_peer(struct peer_af *paf);
 392 extern void bpacket_add_peer(struct bpacket *pkt, struct peer_af *paf);
 393 unsigned int bpacket_queue_virtual_length(struct peer_af *paf);
 394 extern void bpacket_queue_show_vty(struct bpacket_queue *q, struct vty *vty);
 395 int subgroup_packets_to_build(struct update_subgroup *subgrp);
 396 extern struct bpacket *subgroup_update_packet(struct update_subgroup *s);
 397 extern struct bpacket *subgroup_withdraw_packet(struct update_subgroup *s);
 398 extern struct stream *bpacket_reformat_for_peer(struct bpacket *pkt,
 399                                                 struct peer_af *paf);
 400 extern void bpacket_attr_vec_arr_reset(struct bpacket_attr_vec_arr *vecarr);
 401 extern void bpacket_attr_vec_arr_set_vec(struct bpacket_attr_vec_arr *vecarr,
 402                                          bpacket_attr_vec_type type,
 403                                          struct stream *s, struct attr *attr);
 404 extern void subgroup_default_update_packet(struct update_subgroup *subgrp,
 405                                            struct attr *attr,
 406                                            struct peer *from);
 407 extern void subgroup_default_withdraw_packet(struct update_subgroup *subgrp);
 408
 409 /* bgp_updgrp_adv.c */
 410 extern struct bgp_advertise *
 411 bgp_advertise_clean_subgroup(struct update_subgroup *subgrp,
 412                              struct bgp_adj_out *adj);
 413 extern void update_group_show_adj_queue(struct bgp *bgp, afi_t afi, safi_t safi,
 414                                         struct vty *vty, uint64_t id);
 415 extern void update_group_show_advertised(struct bgp *bgp, afi_t afi,
 416                                          safi_t safi, struct vty *vty,
 417                                          uint64_t id);
 418 extern void update_group_show_packet_queue(struct bgp *bgp, afi_t afi,
 419                                            safi_t safi, struct vty *vty,
 420                                            uint64_t id);
 421 extern void subgroup_announce_route(struct update_subgroup *subgrp);
 422 extern void subgroup_announce_all(struct update_subgroup *subgrp);
 423
 424 extern void subgroup_default_originate(struct update_subgroup *subgrp,
 425                                        int withdraw);
 426 extern void group_announce_route(struct bgp *bgp, afi_t afi, safi_t safi,
 427                                  struct bgp_node *rn, struct bgp_info *ri);
 428 extern void subgroup_clear_table(struct update_subgroup *subgrp);
 429 extern void update_group_announce(struct bgp *bgp);
 430 extern void update_group_announce_rrclients(struct bgp *bgp);
 431 extern void peer_af_announce_route(struct peer_af *paf, int combine);
 432 extern struct bgp_adj_out *bgp_adj_out_alloc(struct update_subgroup *subgrp,
 433                                              struct bgp_node *rn,
 434                                              u_int32_t addpath_tx_id);
 435 extern void bgp_adj_out_remove_subgroup(struct bgp_node *rn,
 436                                         struct bgp_adj_out *adj,
 437                                         struct update_subgroup *subgrp);
 438 extern void bgp_adj_out_set_subgroup(struct bgp_node *rn,
 439                                      struct update_subgroup *subgrp,
 440                                      struct attr *attr, struct bgp_info *binfo);
 441 extern void bgp_adj_out_unset_subgroup(struct bgp_node *rn,
 442                                        struct update_subgroup *subgrp,
 443                                        char withdraw, u_int32_t addpath_tx_id);
 444 void subgroup_announce_table(struct update_subgroup *subgrp,
 445                              struct bgp_table *table);
 446 extern void subgroup_trigger_write(struct update_subgroup *subgrp);
 447
 448 extern int update_group_clear_update_dbg(struct update_group *updgrp,
 449                                          void *arg);
 450
 451 extern void update_bgp_group_free(struct bgp *bgp);
 452 extern int bgp_addpath_encode_tx(struct peer *peer, afi_t afi, safi_t safi);
 453 extern int bgp_addpath_tx_path(struct peer *peer, afi_t afi, safi_t safi,
 454                                struct bgp_info *ri);
 455
 456 /*
 457  * Inline functions
 458  */
 459
 460 /*
 461  * bpacket_queue_is_empty
 462  */
 463 static inline int bpacket_queue_is_empty(struct bpacket_queue *queue)
 464 {
 465
 466         /*
 467          * The packet queue is empty if it only contains a sentinel.
 468          */
 469         if (queue->curr_count != 1)
 470                 return 0;
 471
 472         assert(bpacket_queue_first(queue)->buffer == NULL);
 473         return 1;
 474 }
 475
 476 /*
 477  * bpacket_next
 478  *
 479  * Returns the packet after the given packet in a bpacket queue.
 480  */
 481 static inline struct bpacket *bpacket_next(struct bpacket *pkt)
 482 {
 483         return TAILQ_NEXT(pkt, pkt_train);
 484 }
 485
 486 /*
 487  * update_group_adjust_peer_afs
 488  *
 489  * Adjust all peer_af structures for the given peer.
 490  */
 491 static inline void update_group_adjust_peer_afs(struct peer *peer)
 492 {
 493         struct peer_af *paf;
 494         int afidx;
 495
 496         for (afidx = BGP_AF_START; afidx < BGP_AF_MAX; afidx++) {
 497                 paf = peer->peer_af_array[afidx];
 498                 if (paf != NULL)
 499                         update_group_adjust_peer(paf);
 500         }
 501 }
 502
 503 /*
 504  * update_group_remove_peer_afs
 505  *
 506  * Remove all peer_af structures for the given peer from their subgroups.
 507  */
 508 static inline void update_group_remove_peer_afs(struct peer *peer)
 509 {
 510         struct peer_af *paf;
 511         int afidx;
 512
 513         for (afidx = BGP_AF_START; afidx < BGP_AF_MAX; afidx++) {
 514                 paf = peer->peer_af_array[afidx];
 515                 if (paf != NULL)
 516                         update_subgroup_remove_peer(PAF_SUBGRP(paf), paf);
 517         }
 518 }
 519
 520 /*
 521  * update_subgroup_needs_refresh
 522  */
 523 static inline int
 524 update_subgroup_needs_refresh(const struct update_subgroup *subgrp)
 525 {
 526         if (CHECK_FLAG(subgrp->flags, SUBGRP_FLAG_NEEDS_REFRESH))
 527                 return 1;
 528         else
 529                 return 0;
 530 }
 531
 532 /*
 533  * update_subgroup_set_needs_refresh
 534  */
 535 static inline void
 536 update_subgroup_set_needs_refresh(struct update_subgroup *subgrp, int value)
 537 {
 538         if (value)
 539                 SET_FLAG(subgrp->flags, SUBGRP_FLAG_NEEDS_REFRESH);
 540         else
 541                 UNSET_FLAG(subgrp->flags, SUBGRP_FLAG_NEEDS_REFRESH);
 542 }
 543
 544 static inline struct update_subgroup *peer_subgroup(struct peer *peer,
 545                                                     afi_t afi, safi_t safi)
 546 {
 547         struct peer_af *paf;
 548
 549         paf = peer_af_find(peer, afi, safi);
 550         if (paf)
 551                 return PAF_SUBGRP(paf);
 552         return NULL;
 553 }
 554
 555 /*
 556  * update_group_adjust_peer_afs
 557  *
 558  * Adjust all peer_af structures for the given peer.
 559  */
 560 static inline void bgp_announce_peer(struct peer *peer)
 561 {
 562         struct peer_af *paf;
 563         int afidx;
 564
 565         for (afidx = BGP_AF_START; afidx < BGP_AF_MAX; afidx++) {
 566                 paf = peer->peer_af_array[afidx];
 567                 if (paf != NULL)
 568                         subgroup_announce_all(PAF_SUBGRP(paf));
 569         }
 570 }
 571
 572 /**
 573  * advertise_list_is_empty
 574  */
 575 static inline int advertise_list_is_empty(struct update_subgroup *subgrp)
 576 {
 577         if (!BGP_ADV_FIFO_EMPTY(&subgrp->sync->update)
 578             || !BGP_ADV_FIFO_EMPTY(&subgrp->sync->withdraw)
 579             || !BGP_ADV_FIFO_EMPTY(&subgrp->sync->withdraw_low)) {
 580                 return 0;
 581         }
 582
 583         return 1;
 584 }
 585
 586 #endif /* _QUAGGA_BGP_UPDGRP_H */