diff options
| -rw-r--r-- | bgpd/bgp_damp.c | 570 | ||||
| -rw-r--r-- | bgpd/bgp_damp.h | 49 | ||||
| -rw-r--r-- | bgpd/bgp_memory.c | 1 | ||||
| -rw-r--r-- | bgpd/bgp_memory.h | 1 | ||||
| -rw-r--r-- | bgpd/bgp_route.c | 42 | ||||
| -rw-r--r-- | bgpd/bgpd.c | 13 | ||||
| -rw-r--r-- | bgpd/bgpd.h | 9 |
7 files changed, 501 insertions, 184 deletions
diff --git a/bgpd/bgp_damp.c b/bgpd/bgp_damp.c index f46d416c3..b740979b8 100644 --- a/bgpd/bgp_damp.c +++ b/bgpd/bgp_damp.c @@ -37,19 +37,115 @@ #include "bgpd/bgp_advertise.h" #include "bgpd/bgp_vty.h" -/* Global variable to access damping configuration */ -static struct bgp_damp_config damp[AFI_MAX][SAFI_MAX]; +static void bgp_reuselist_add(struct reuselist *list, + struct bgp_damp_info *info) +{ + struct reuselist_node *new_node; + + assert(info); + new_node = XCALLOC(MTYPE_BGP_DAMP_REUSELIST, sizeof(*new_node)); + new_node->info = info; + SLIST_INSERT_HEAD(list, new_node, entry); +} + +static void bgp_reuselist_del(struct reuselist *list, + struct reuselist_node **node) +{ + if ((*node) == NULL) + return; + assert(list && node && *node); + SLIST_REMOVE(list, (*node), reuselist_node, entry); + XFREE(MTYPE_BGP_DAMP_REUSELIST, (*node)); + *node = NULL; +} -/* Utility macro to add and delete BGP dampening information to no - used list. */ -#define BGP_DAMP_LIST_ADD(N, A) BGP_PATH_INFO_ADD(N, A, no_reuse_list) -#define BGP_DAMP_LIST_DEL(N, A) BGP_PATH_INFO_DEL(N, A, no_reuse_list) +static void bgp_reuselist_switch(struct reuselist *source, + struct reuselist_node *node, + struct reuselist *target) +{ + assert(source && target && node); + SLIST_REMOVE(source, node, reuselist_node, entry); + SLIST_INSERT_HEAD(target, node, entry); +} + +static void bgp_reuselist_free(struct reuselist *list) +{ + struct reuselist_node *rn; + + assert(list); + while ((rn = SLIST_FIRST(list)) != NULL) + bgp_reuselist_del(list, &rn); +} + +static struct reuselist_node *bgp_reuselist_find(struct reuselist *list, + struct bgp_damp_info *info) +{ + struct reuselist_node *rn; + + assert(list && info); + SLIST_FOREACH (rn, list, entry) { + if (rn->info == info) + return rn; + } + return NULL; +} + +static void bgp_damp_info_unclaim(struct bgp_damp_info *bdi) +{ + struct reuselist_node *node; + + assert(bdi && bdi->config); + if (bdi->index == BGP_DAMP_NO_REUSE_LIST_INDEX) { + node = bgp_reuselist_find(&bdi->config->no_reuse_list, bdi); + if (node) + bgp_reuselist_del(&bdi->config->no_reuse_list, &node); + } else { + node = bgp_reuselist_find(&bdi->config->reuse_list[bdi->index], + bdi); + if (node) + bgp_reuselist_del(&bdi->config->reuse_list[bdi->index], + &node); + } + bdi->config = NULL; +} + +static void bgp_damp_info_claim(struct bgp_damp_info *bdi, + struct bgp_damp_config *bdc) +{ + assert(bdc && bdi); + if (bdi->config == NULL) { + bdi->config = bdc; + return; + } + bgp_damp_info_unclaim(bdi); + bdi->config = bdc; + bdi->afi = bdc->afi; + bdi->safi = bdc->safi; +} + +struct bgp_damp_config *get_active_bdc_from_pi(struct bgp_path_info *pi, + afi_t afi, safi_t safi) +{ + if (!pi) + return NULL; + if (CHECK_FLAG(pi->peer->af_flags[afi][safi], + PEER_FLAG_CONFIG_DAMPENING)) + return &pi->peer->damp[afi][safi]; + if (peer_group_active(pi->peer)) + if (CHECK_FLAG(pi->peer->group->conf->af_flags[afi][safi], + PEER_FLAG_CONFIG_DAMPENING)) + return &pi->peer->group->conf->damp[afi][safi]; + if (CHECK_FLAG(pi->peer->bgp->af_flags[afi][safi], + BGP_CONFIG_DAMPENING)) + return &pi->peer->bgp->damp[afi][safi]; + return NULL; +} /* Calculate reuse list index by penalty value. */ static int bgp_reuse_index(int penalty, struct bgp_damp_config *bdc) { unsigned int i; - int index; + unsigned int index; /* * reuse_limit can't be zero, this is for Coverity @@ -72,27 +168,45 @@ static int bgp_reuse_index(int penalty, struct bgp_damp_config *bdc) static void bgp_reuse_list_add(struct bgp_damp_info *bdi, struct bgp_damp_config *bdc) { - int index; - - index = bdi->index = bgp_reuse_index(bdi->penalty, bdc); - - bdi->prev = NULL; - bdi->next = bdc->reuse_list[index]; - if (bdc->reuse_list[index]) - bdc->reuse_list[index]->prev = bdi; - bdc->reuse_list[index] = bdi; + bgp_damp_info_claim(bdi, bdc); + bdi->index = bgp_reuse_index(bdi->penalty, bdc); + bgp_reuselist_add(&bdc->reuse_list[bdi->index], bdi); } /* Delete BGP dampening information from reuse list. */ static void bgp_reuse_list_delete(struct bgp_damp_info *bdi, struct bgp_damp_config *bdc) { - if (bdi->next) - bdi->next->prev = bdi->prev; - if (bdi->prev) - bdi->prev->next = bdi->next; - else - bdc->reuse_list[bdi->index] = bdi->next; + struct reuselist *list; + struct reuselist_node *rn; + + list = &bdc->reuse_list[bdi->index]; + rn = bgp_reuselist_find(list, bdi); + bgp_damp_info_unclaim(bdi); + bgp_reuselist_del(list, &rn); +} + +static void bgp_no_reuse_list_add(struct bgp_damp_info *bdi, + struct bgp_damp_config *bdc) +{ + bgp_damp_info_claim(bdi, bdc); + bdi->index = BGP_DAMP_NO_REUSE_LIST_INDEX; + bgp_reuselist_add(&bdc->no_reuse_list, bdi); +} + +static void bgp_no_reuse_list_delete(struct bgp_damp_info *bdi, + struct bgp_damp_config *bdc) +{ + struct reuselist_node *rn; + + assert(bdc && bdi); + if (bdi->config == NULL) { + bgp_damp_info_unclaim(bdi); + return; + } + bdi->config = NULL; + rn = bgp_reuselist_find(&bdc->no_reuse_list, bdi); + bgp_reuselist_del(&bdc->no_reuse_list, &rn); } /* Return decayed penalty value. */ @@ -115,32 +229,34 @@ int bgp_damp_decay(time_t tdiff, int penalty, struct bgp_damp_config *bdc) is evaluated. RFC2439 Section 4.8.7. */ static int bgp_reuse_timer(struct thread *t) { + struct bgp_damp_config *bdc = THREAD_ARG(t); struct bgp_damp_info *bdi; - struct bgp_damp_info *next; + struct reuselist plist; + struct reuselist_node *node; + struct bgp *bgp; time_t t_now, t_diff; - struct bgp_damp_config *bdc = THREAD_ARG(t); - - bdc->t_reuse = NULL; thread_add_timer(bm->master, bgp_reuse_timer, bdc, DELTA_REUSE, &bdc->t_reuse); t_now = bgp_clock(); - /* 1. save a pointer to the current zeroth queue head and zero the - list head entry. */ - bdi = bdc->reuse_list[bdc->reuse_offset]; - bdc->reuse_list[bdc->reuse_offset] = NULL; + /* 1. save a pointer to the current queue head and zero the list head + * list head entry. */ + assert(bdc->reuse_offset < bdc->reuse_list_size); + plist = bdc->reuse_list[bdc->reuse_offset]; + node = SLIST_FIRST(&plist); + SLIST_INIT(&bdc->reuse_list[bdc->reuse_offset]); /* 2. set offset = modulo reuse-list-size ( offset + 1 ), thereby rotating the circular queue of list-heads. */ bdc->reuse_offset = (bdc->reuse_offset + 1) % bdc->reuse_list_size; + assert(bdc->reuse_offset < bdc->reuse_list_size); /* 3. if ( the saved list head pointer is non-empty ) */ - for (; bdi; bdi = next) { - struct bgp *bgp = bdi->path->peer->bgp; - - next = bdi->next; + while ((node = SLIST_FIRST(&plist)) != NULL) { + bdi = node->info; + bgp = bdi->path->peer->bgp; /* Set t-diff = t-now - t-updated. */ t_diff = t_now - bdi->t_updated; @@ -169,16 +285,27 @@ static int bgp_reuse_timer(struct thread *t) bdi->safi); } - if (bdi->penalty <= bdc->reuse_limit / 2.0) - bgp_damp_info_free(bdi, 1, bdc->afi, bdc->safi); - else - BGP_DAMP_LIST_ADD(bdc, bdi); - } else + if (bdi->penalty <= bdc->reuse_limit / 2.0) { + bgp_damp_info_free(&bdi, bdc, 1, bdi->afi, + bdi->safi); + bgp_reuselist_del(&plist, &node); + } else { + node->info->index = + BGP_DAMP_NO_REUSE_LIST_INDEX; + bgp_reuselist_switch(&plist, node, + &bdc->no_reuse_list); + } + } else { /* Re-insert into another list (See RFC2439 Section * 4.8.6). */ - bgp_reuse_list_add(bdi, bdc); + bdi->index = bgp_reuse_index(bdi->penalty, bdc); + bgp_reuselist_switch(&plist, node, + &bdc->reuse_list[bdi->index]); + } } + assert(SLIST_EMPTY(&plist)); + return 0; } @@ -189,10 +316,13 @@ int bgp_damp_withdraw(struct bgp_path_info *path, struct bgp_dest *dest, time_t t_now; struct bgp_damp_info *bdi = NULL; unsigned int last_penalty = 0; - struct bgp_damp_config *bdc = &damp[afi][safi]; + struct bgp_damp_config *bdc; - t_now = bgp_clock(); + bdc = get_active_bdc_from_pi(path, afi, safi); + if (!bdc) + return BGP_DAMP_USED; + t_now = bgp_clock(); /* Processing Unreachable Messages. */ if (path->extra) bdi = path->extra->damp_info; @@ -214,12 +344,13 @@ int bgp_damp_withdraw(struct bgp_path_info *path, struct bgp_dest *dest, bdi->flap = 1; bdi->start_time = t_now; bdi->suppress_time = 0; - bdi->index = -1; + bdi->index = BGP_DAMP_NO_REUSE_LIST_INDEX; bdi->afi = afi; bdi->safi = safi; (bgp_path_info_extra_get(path))->damp_info = bdi; - BGP_DAMP_LIST_ADD(bdc, bdi); + bgp_no_reuse_list_add(bdi, bdc); } else { + bgp_damp_info_claim(bdi, bdc); last_penalty = bdi->penalty; /* 1. Set t-diff = t-now - t-updated. */ @@ -245,7 +376,7 @@ int bgp_damp_withdraw(struct bgp_path_info *path, struct bgp_dest *dest, /* Remove the route from a reuse list if it is on one. */ if (CHECK_FLAG(bdi->path->flags, BGP_PATH_DAMPED)) { /* If decay rate isn't equal to 0, reinsert brn. */ - if (bdi->penalty != last_penalty && bdi->index >= 0) { + if (bdi->penalty != last_penalty) { bgp_reuse_list_delete(bdi, bdc); bgp_reuse_list_add(bdi, bdc); } @@ -257,10 +388,9 @@ int bgp_damp_withdraw(struct bgp_path_info *path, struct bgp_dest *dest, if (bdi->penalty >= bdc->suppress_value) { bgp_path_info_set_flag(dest, path, BGP_PATH_DAMPED); bdi->suppress_time = t_now; - BGP_DAMP_LIST_DEL(bdc, bdi); + bgp_no_reuse_list_delete(bdi, bdc); bgp_reuse_list_add(bdi, bdc); } - return BGP_DAMP_USED; } @@ -270,7 +400,10 @@ int bgp_damp_update(struct bgp_path_info *path, struct bgp_dest *dest, time_t t_now; struct bgp_damp_info *bdi; int status; - struct bgp_damp_config *bdc = &damp[afi][safi]; + struct bgp_damp_config *bdc; + + bdc = get_active_bdc_from_pi(path, afi, safi); + assert(bdc); if (!path->extra || !((bdi = path->extra->damp_info))) return BGP_DAMP_USED; @@ -289,7 +422,7 @@ int bgp_damp_update(struct bgp_path_info *path, struct bgp_dest *dest, && (bdi->penalty < bdc->reuse_limit)) { bgp_path_info_unset_flag(dest, path, BGP_PATH_DAMPED); bgp_reuse_list_delete(bdi, bdc); - BGP_DAMP_LIST_ADD(bdc, bdi); + bgp_no_reuse_list_add(bdi, bdc); bdi->suppress_time = 0; status = BGP_DAMP_USED; } else @@ -297,36 +430,29 @@ int bgp_damp_update(struct bgp_path_info *path, struct bgp_dest *dest, if (bdi->penalty > bdc->reuse_limit / 2.0) bdi->t_updated = t_now; - else - bgp_damp_info_free(bdi, 0, afi, safi); + else { + bgp_damp_info_unclaim(bdi); + bgp_damp_info_free(&bdi, bdc, 0, afi, safi); + } return status; } -void bgp_damp_info_free(struct bgp_damp_info *bdi, int withdraw, afi_t afi, - safi_t safi) +void bgp_damp_info_free(struct bgp_damp_info **bdi, struct bgp_damp_config *bdc, + int withdraw, afi_t afi, safi_t safi) { - struct bgp_path_info *path; - struct bgp_damp_config *bdc = &damp[afi][safi]; + assert(bdc && bdi && *bdi); - if (!bdi) + if ((*bdi)->path == NULL) { + XFREE(MTYPE_BGP_DAMP_INFO, (*bdi)); return; + } - path = bdi->path; - path->extra->damp_info = NULL; - - if (CHECK_FLAG(path->flags, BGP_PATH_DAMPED)) - bgp_reuse_list_delete(bdi, bdc); - else - BGP_DAMP_LIST_DEL(bdc, bdi); - - bgp_path_info_unset_flag(bdi->dest, path, + (*bdi)->path->extra->damp_info = NULL; + bgp_path_info_unset_flag((*bdi)->dest, (*bdi)->path, BGP_PATH_HISTORY | BGP_PATH_DAMPED); - - if (bdi->lastrecord == BGP_RECORD_WITHDRAW && withdraw) - bgp_path_info_delete(bdi->dest, path); - - XFREE(MTYPE_BGP_DAMP_INFO, bdi); + if ((*bdi)->lastrecord == BGP_RECORD_WITHDRAW && withdraw) + bgp_path_info_delete((*bdi)->dest, (*bdi)->path); } static void bgp_damp_parameter_set(int hlife, int reuse, int sup, int maxsup, @@ -369,8 +495,7 @@ static void bgp_damp_parameter_set(int hlife, int reuse, int sup, int maxsup, bdc->reuse_list = XCALLOC(MTYPE_BGP_DAMP_ARRAY, - bdc->reuse_list_size * sizeof(struct bgp_reuse_node *)); - + bdc->reuse_list_size * sizeof(struct reuselist)); /* Reuse-array computations */ bdc->reuse_index = XCALLOC(MTYPE_BGP_DAMP_ARRAY, sizeof(int) * bdc->reuse_index_size); @@ -397,7 +522,7 @@ static void bgp_damp_parameter_set(int hlife, int reuse, int sup, int maxsup, int bgp_damp_enable(struct bgp *bgp, afi_t afi, safi_t safi, time_t half, unsigned int reuse, unsigned int suppress, time_t max) { - struct bgp_damp_config *bdc = &damp[afi][safi]; + struct bgp_damp_config *bdc = &bgp->damp[afi][safi]; if (CHECK_FLAG(bgp->af_flags[afi][safi], BGP_CONFIG_DAMPENING)) { if (bdc->half_life == half && bdc->reuse_limit == reuse @@ -409,6 +534,8 @@ int bgp_damp_enable(struct bgp *bgp, afi_t afi, safi_t safi, time_t half, SET_FLAG(bgp->af_flags[afi][safi], BGP_CONFIG_DAMPENING); bgp_damp_parameter_set(half, reuse, suppress, max, bdc); + bdc->afi = afi; + bdc->safi = safi; /* Register reuse timer. */ thread_add_timer(bm->master, bgp_reuse_timer, bdc, DELTA_REUSE, @@ -417,8 +544,30 @@ int bgp_damp_enable(struct bgp *bgp, afi_t afi, safi_t safi, time_t half, return 0; } -static void bgp_damp_config_clean(struct bgp_damp_config *bdc) +/* Clean all the bgp_damp_info stored in reuse_list and no_reuse_list. */ +void bgp_damp_info_clean(struct bgp_damp_config *bdc, afi_t afi, safi_t safi) { + struct bgp_damp_info *bdi; + struct reuselist_node *rn; + struct reuselist *list; + unsigned int i; + + bdc->reuse_offset = 0; + for (i = 0; i < bdc->reuse_list_size; ++i) { + list = &bdc->reuse_list[i]; + while ((rn = SLIST_FIRST(list)) != NULL) { + bdi = rn->info; + bgp_reuselist_del(list, &rn); + bgp_damp_info_free(&bdi, bdc, 1, afi, safi); + } + } + + while ((rn = SLIST_FIRST(&bdc->no_reuse_list)) != NULL) { + bdi = rn->info; + bgp_reuselist_del(&bdc->no_reuse_list, &rn); + bgp_damp_info_free(&bdi, bdc, 1, afi, safi); + } + /* Free decay array */ XFREE(MTYPE_BGP_DAMP_ARRAY, bdc->decay_array); bdc->decay_array_size = 0; @@ -428,96 +577,81 @@ static void bgp_damp_config_clean(struct bgp_damp_config *bdc) bdc->reuse_index_size = 0; /* Free reuse list array. */ + for (i = 0; i < bdc->reuse_list_size; ++i) + bgp_reuselist_free(&bdc->reuse_list[i]); + XFREE(MTYPE_BGP_DAMP_ARRAY, bdc->reuse_list); bdc->reuse_list_size = 0; -} - -/* Clean all the bgp_damp_info stored in reuse_list. */ -void bgp_damp_info_clean(afi_t afi, safi_t safi) -{ - unsigned int i; - struct bgp_damp_info *bdi, *next; - struct bgp_damp_config *bdc = &damp[afi][safi]; - - bdc->reuse_offset = 0; - - for (i = 0; i < bdc->reuse_list_size; i++) { - if (!bdc->reuse_list[i]) - continue; - - for (bdi = bdc->reuse_list[i]; bdi; bdi = next) { - next = bdi->next; - bgp_damp_info_free(bdi, 1, afi, safi); - } - bdc->reuse_list[i] = NULL; - } - for (bdi = bdc->no_reuse_list; bdi; bdi = next) { - next = bdi->next; - bgp_damp_info_free(bdi, 1, afi, safi); - } - bdc->no_reuse_list = NULL; + THREAD_OFF(bdc->t_reuse); } +/* Disable route flap dampening for a bgp instance. + * + * Please note that this function also gets used to free memory when deleting a + * bgp instance. + */ int bgp_damp_disable(struct bgp *bgp, afi_t afi, safi_t safi) { - struct bgp_damp_config *bdc = &damp[afi][safi]; + struct bgp_damp_config *bdc; + + bdc = &bgp->damp[afi][safi]; + if (!bdc) + return 0; + /* If it wasn't enabled, there's nothing to do. */ if (!CHECK_FLAG(bgp->af_flags[afi][safi], BGP_CONFIG_DAMPENING)) return 0; /* Cancel reuse event. */ - thread_cancel(&(bdc->t_reuse)); + thread_cancel(&bdc->t_reuse); /* Clean BGP dampening information. */ - bgp_damp_info_clean(afi, safi); - - /* Clear configuration */ - bgp_damp_config_clean(bdc); + bgp_damp_info_clean(bdc, afi, safi); UNSET_FLAG(bgp->af_flags[afi][safi], BGP_CONFIG_DAMPENING); + return 0; } -void bgp_config_write_damp(struct vty *vty, afi_t afi, safi_t safi) +void bgp_config_write_damp(struct vty *vty, struct bgp *bgp, afi_t afi, + safi_t safi) { - if (damp[afi][safi].half_life == DEFAULT_HALF_LIFE * 60 - && damp[afi][safi].reuse_limit == DEFAULT_REUSE - && damp[afi][safi].suppress_value == DEFAULT_SUPPRESS - && damp[afi][safi].max_suppress_time - == damp[afi][safi].half_life * 4) + struct bgp_damp_config *bdc; + + bdc = &bgp->damp[afi][safi]; + if (bdc->half_life == DEFAULT_HALF_LIFE * 60 + && bdc->reuse_limit == DEFAULT_REUSE + && bdc->suppress_value == DEFAULT_SUPPRESS + && bdc->max_suppress_time == bdc->half_life * 4) vty_out(vty, " bgp dampening\n"); - else if (damp[afi][safi].half_life != DEFAULT_HALF_LIFE * 60 - && damp[afi][safi].reuse_limit == DEFAULT_REUSE - && damp[afi][safi].suppress_value == DEFAULT_SUPPRESS - && damp[afi][safi].max_suppress_time - == damp[afi][safi].half_life * 4) - vty_out(vty, " bgp dampening %lld\n", - damp[afi][safi].half_life / 60LL); + else if (bdc->half_life != DEFAULT_HALF_LIFE * 60 + && bdc->reuse_limit == DEFAULT_REUSE + && bdc->suppress_value == DEFAULT_SUPPRESS + && bdc->max_suppress_time == bdc->half_life * 4) + vty_out(vty, " bgp dampening %lld\n", bdc->half_life / 60LL); else vty_out(vty, " bgp dampening %lld %d %d %lld\n", - damp[afi][safi].half_life / 60LL, - damp[afi][safi].reuse_limit, - damp[afi][safi].suppress_value, - damp[afi][safi].max_suppress_time / 60LL); + bdc->half_life / 60LL, bdc->reuse_limit, + bdc->suppress_value, bdc->max_suppress_time / 60LL); } -static const char *bgp_get_reuse_time(unsigned int penalty, char *buf, - size_t len, afi_t afi, safi_t safi, - bool use_json, json_object *json) +static const char *bgp_get_reuse_time(struct bgp_damp_config *bdc, + unsigned int penalty, char *buf, + size_t len, bool use_json, + json_object *json) { time_t reuse_time = 0; struct tm tm; int time_store = 0; - if (penalty > damp[afi][safi].reuse_limit) { + if (penalty > bdc->reuse_limit) { reuse_time = (int)(DELTA_T - * ((log((double)damp[afi][safi].reuse_limit - / penalty)) - / (log(damp[afi][safi].decay_array[1])))); + * ((log((double)bdc->reuse_limit / penalty)) + / (log(bdc->decay_array[1])))); - if (reuse_time > damp[afi][safi].max_suppress_time) - reuse_time = damp[afi][safi].max_suppress_time; + if (reuse_time > bdc->max_suppress_time) + reuse_time = bdc->max_suppress_time; gmtime_r(&reuse_time, &tm); } else @@ -569,14 +703,15 @@ static const char *bgp_get_reuse_time(unsigned int penalty, char *buf, return buf; } -void bgp_damp_info_vty(struct vty *vty, struct bgp_path_info *path, afi_t afi, - safi_t safi, json_object *json_path) +void bgp_damp_info_vty(struct vty *vty, struct bgp *bgp, + struct bgp_path_info *path, afi_t afi, safi_t safi, + json_object *json_path) { struct bgp_damp_info *bdi; time_t t_now, t_diff; char timebuf[BGP_UPTIME_LEN]; int penalty; - struct bgp_damp_config *bdc = &damp[afi][safi]; + struct bgp_damp_config *bdc = &bgp->damp[afi][safi]; if (!path->extra) return; @@ -602,8 +737,8 @@ void bgp_damp_info_vty(struct vty *vty, struct bgp_path_info *path, afi_t afi, if (CHECK_FLAG(path->flags, BGP_PATH_DAMPED) && !CHECK_FLAG(path->flags, BGP_PATH_HISTORY)) - bgp_get_reuse_time(penalty, timebuf, BGP_UPTIME_LEN, - afi, safi, 1, json_path); + bgp_get_reuse_time(bdc, penalty, timebuf, + BGP_UPTIME_LEN, 1, json_path); } else { vty_out(vty, " Dampinfo: penalty %d, flapped %d times in %s", @@ -614,14 +749,15 @@ void bgp_damp_info_vty(struct vty *vty, struct bgp_path_info *path, afi_t afi, if (CHECK_FLAG(path->flags, BGP_PATH_DAMPED) && !CHECK_FLAG(path->flags, BGP_PATH_HISTORY)) vty_out(vty, ", reuse in %s", - bgp_get_reuse_time(penalty, timebuf, - BGP_UPTIME_LEN, afi, safi, 0, + bgp_get_reuse_time(bdc, penalty, timebuf, + BGP_UPTIME_LEN, 0, json_path)); vty_out(vty, "\n"); } } + const char *bgp_damp_reuse_time_vty(struct vty *vty, struct bgp_path_info *path, char *timebuf, size_t len, afi_t afi, safi_t safi, bool use_json, @@ -630,7 +766,11 @@ const char *bgp_damp_reuse_time_vty(struct vty *vty, struct bgp_path_info *path, struct bgp_damp_info *bdi; time_t t_now, t_diff; int penalty; - struct bgp_damp_config *bdc = &damp[afi][safi]; + struct bgp_damp_config *bdc; + + bdc = get_active_bdc_from_pi(path, afi, safi); + if (!bdc) + return NULL; if (!path->extra) return NULL; @@ -648,24 +788,23 @@ const char *bgp_damp_reuse_time_vty(struct vty *vty, struct bgp_path_info *path, t_diff = t_now - bdi->t_updated; penalty = bgp_damp_decay(t_diff, bdi->penalty, bdc); - return bgp_get_reuse_time(penalty, timebuf, len, afi, safi, use_json, - json); + return bgp_get_reuse_time(bdc, penalty, timebuf, len, use_json, json); } + static int bgp_print_dampening_parameters(struct bgp *bgp, struct vty *vty, afi_t afi, safi_t safi) { + struct bgp_damp_config *bdc; if (CHECK_FLAG(bgp->af_flags[afi][safi], BGP_CONFIG_DAMPENING)) { + bdc = &bgp->damp[afi][safi]; vty_out(vty, "Half-life time: %lld min\n", - (long long)damp[afi][safi].half_life / 60); - vty_out(vty, "Reuse penalty: %d\n", - damp[afi][safi].reuse_limit); - vty_out(vty, "Suppress penalty: %d\n", - damp[afi][safi].suppress_value); + (long long)bdc->half_life / 60); + vty_out(vty, "Reuse penalty: %d\n", bdc->reuse_limit); + vty_out(vty, "Suppress penalty: %d\n", bdc->suppress_value); vty_out(vty, "Max suppress time: %lld min\n", - (long long)damp[afi][safi].max_suppress_time / 60); - vty_out(vty, "Max suppress penalty: %u\n", - damp[afi][safi].ceiling); + (long long)bdc->max_suppress_time / 60); + vty_out(vty, "Max suppress penalty: %u\n", bdc->ceiling); vty_out(vty, "\n"); } else vty_out(vty, "dampening not enabled for %s\n", @@ -678,8 +817,8 @@ int bgp_show_dampening_parameters(struct vty *vty, afi_t afi, safi_t safi, uint8_t show_flags) { struct bgp *bgp; - bgp = bgp_get_default(); + bgp = bgp_get_default(); if (bgp == NULL) { vty_out(vty, "No BGP process is configured\n"); return CMD_WARNING; @@ -718,3 +857,132 @@ int bgp_show_dampening_parameters(struct vty *vty, afi_t afi, safi_t safi, } return CMD_SUCCESS; } + +void bgp_peer_damp_enable(struct peer *peer, afi_t afi, safi_t safi, + time_t half, unsigned int reuse, + unsigned int suppress, time_t max) +{ + struct bgp_damp_config *bdc; + + if (!peer) + return; + bdc = &peer->damp[afi][safi]; + if (peer_af_flag_check(peer, afi, safi, PEER_FLAG_CONFIG_DAMPENING)) { + if (bdc->half_life == half && bdc->reuse_limit == reuse + && bdc->suppress_value == suppress + && bdc->max_suppress_time == max) + return; + bgp_peer_damp_disable(peer, afi, safi); + } + SET_FLAG(peer->af_flags[afi][safi], PEER_FLAG_CONFIG_DAMPENING); + bgp_damp_parameter_set(half, reuse, suppress, max, bdc); + bdc->afi = afi; + bdc->safi = safi; + thread_add_timer(bm->master, bgp_reuse_timer, bdc, DELTA_REUSE, + &bdc->t_reuse); +} + +/* Disable route flap dampening for a peer. + * + * Please note that this function also gets used to free memory when deleting a + * peer or peer group. + */ +void bgp_peer_damp_disable(struct peer *peer, afi_t afi, safi_t safi) +{ + struct bgp_damp_config *bdc; + + if (!peer_af_flag_check(peer, afi, safi, PEER_FLAG_CONFIG_DAMPENING)) + return; + bdc = &peer->damp[afi][safi]; + if (!bdc) + return; + bgp_damp_info_clean(bdc, afi, safi); + UNSET_FLAG(peer->af_flags[afi][safi], PEER_FLAG_CONFIG_DAMPENING); +} + +void bgp_config_write_peer_damp(struct vty *vty, struct peer *peer, afi_t afi, + safi_t safi) +{ + struct bgp_damp_config *bdc; + + bdc = &peer->damp[afi][safi]; + if (bdc->half_life == DEFAULT_HALF_LIFE * 60 + && bdc->reuse_limit == DEFAULT_REUSE + && bdc->suppress_value == DEFAULT_SUPPRESS + && bdc->max_suppress_time == bdc->half_life * 4) + vty_out(vty, " neighbor %s dampening\n", peer->host); + else if (bdc->half_life != DEFAULT_HALF_LIFE * 60 + && bdc->reuse_limit == DEFAULT_REUSE + && bdc->suppress_value == DEFAULT_SUPPRESS + && bdc->max_suppress_time == bdc->half_life * 4) + vty_out(vty, " neighbor %s dampening %lld\n", peer->host, + bdc->half_life / 60LL); + else + vty_out(vty, " neighbor %s dampening %lld %d %d %lld\n", + peer->host, bdc->half_life / 60LL, bdc->reuse_limit, + bdc->suppress_value, bdc->max_suppress_time / 60LL); +} + +static void bgp_print_peer_dampening_parameters(struct vty *vty, + struct peer *peer, afi_t afi, + safi_t safi, bool use_json, + json_object *json) +{ + struct bgp_damp_config *bdc; + + if (!peer) + return; + if (CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_CONFIG_DAMPENING)) { + bdc = &peer->damp[afi][safi]; + if (!bdc) + return; + if (use_json) { + json_object_int_add(json, "halfLifeSecs", + bdc->half_life); + json_object_int_add(json, "reusePenalty", + bdc->reuse_limit); + json_object_int_add(json, "suppressPenalty", + bdc->suppress_value); + json_object_int_add(json, "maxSuppressTimeSecs", + bdc->max_suppress_time); + json_object_int_add(json, "maxSuppressPenalty", + bdc->ceiling); + } else { + vty_out(vty, "Half-life time: %lld min\n", + (long long)bdc->half_life / 60); + vty_out(vty, "Reuse penalty: %d\n", bdc->reuse_limit); + vty_out(vty, "Suppress penalty: %d\n", + bdc->suppress_value); + vty_out(vty, "Max suppress time: %lld min\n", + (long long)bdc->max_suppress_time / 60); + vty_out(vty, "Max suppress penalty: %u\n", + bdc->ceiling); + vty_out(vty, "\n"); + } + } else if (!use_json) + vty_out(vty, "neighbor dampening not enabled for %s\n", + get_afi_safi_str(afi, safi, false)); +} + +void bgp_show_peer_dampening_parameters(struct vty *vty, struct peer *peer, + afi_t afi, safi_t safi, bool use_json) +{ + json_object *json; + + if (use_json) { + json = json_object_new_object(); + json_object_string_add(json, "addressFamily", + get_afi_safi_str(afi, safi, false)); + bgp_print_peer_dampening_parameters(vty, peer, afi, safi, true, + json); + vty_out(vty, "%s\n", + json_object_to_json_string_ext( + json, JSON_C_TO_STRING_PRETTY)); + json_object_free(json); + } else { + vty_out(vty, "\nFor address family: %s\n", + get_afi_safi_str(afi, safi, false)); + bgp_print_peer_dampening_parameters(vty, peer, afi, safi, false, + NULL); + } +} diff --git a/bgpd/bgp_damp.h b/bgpd/bgp_damp.h index 604706300..521f59b29 100644 --- a/bgpd/bgp_damp.h +++ b/bgpd/bgp_damp.h @@ -25,11 +25,6 @@ /* Structure maintained on a per-route basis. */ struct bgp_damp_info { - /* Doubly linked list. This information must be linked to - reuse_list or no_reuse_list. */ - struct bgp_damp_info *next; - struct bgp_damp_info *prev; - /* Figure-of-merit. */ unsigned int penalty; @@ -45,6 +40,9 @@ struct bgp_damp_info { /* Time of route start to be suppressed. */ time_t suppress_time; + /* Back reference to associated dampening configuration. */ + struct bgp_damp_config *config; + /* Back reference to bgp_path_info. */ struct bgp_path_info *path; @@ -53,6 +51,8 @@ struct bgp_damp_info { /* Current index in the reuse_list. */ int index; +#define BGP_DAMP_NO_REUSE_LIST_INDEX \ + (-1) /* index for elements on no_reuse_list */ /* Last time message type. */ uint8_t lastrecord; @@ -63,6 +63,13 @@ struct bgp_damp_info { safi_t safi; }; +struct reuselist_node { + SLIST_ENTRY(reuselist_node) entry; + struct bgp_damp_info *info; +}; + +SLIST_HEAD(reuselist, reuselist_node); + /* Specified parameter set configuration. */ struct bgp_damp_config { /* Value over which routes suppressed. */ @@ -100,11 +107,11 @@ struct bgp_damp_config { int *reuse_index; /* Reuse list array per-set based. */ - struct bgp_damp_info **reuse_list; - int reuse_offset; + struct reuselist *reuse_list; + unsigned int reuse_offset; /* All dampening information which is not on reuse list. */ - struct bgp_damp_info *no_reuse_list; + struct reuselist no_reuse_list; /* Reuse timer thread per-set base. */ struct thread *t_reuse; @@ -132,6 +139,8 @@ struct bgp_damp_config { #define REUSE_LIST_SIZE 256 #define REUSE_ARRAY_SIZE 1024 +extern struct bgp_damp_config *get_active_bdc_from_pi(struct bgp_path_info *pi, + afi_t afi, safi_t safi); extern int bgp_damp_enable(struct bgp *, afi_t, safi_t, time_t, unsigned int, unsigned int, time_t); extern int bgp_damp_disable(struct bgp *, afi_t, safi_t); @@ -139,13 +148,18 @@ extern int bgp_damp_withdraw(struct bgp_path_info *path, struct bgp_dest *dest, afi_t afi, safi_t safi, int attr_change); extern int bgp_damp_update(struct bgp_path_info *path, struct bgp_dest *dest, afi_t afi, safi_t saff); -extern void bgp_damp_info_free(struct bgp_damp_info *path, int withdraw, +extern void bgp_damp_info_free(struct bgp_damp_info **path, + struct bgp_damp_config *bdc, int withdraw, afi_t afi, safi_t safi); -extern void bgp_damp_info_clean(afi_t afi, safi_t safi); +extern void bgp_damp_info_clean(struct bgp_damp_config *bdc, afi_t afi, + safi_t safi); +extern void bgp_damp_config_clean(struct bgp_damp_config *bdc); extern int bgp_damp_decay(time_t, int, struct bgp_damp_config *damp); -extern void bgp_config_write_damp(struct vty *, afi_t afi, safi_t safi); -extern void bgp_damp_info_vty(struct vty *vty, struct bgp_path_info *path, - afi_t afi, safi_t safi, json_object *json_path); +extern void bgp_config_write_damp(struct vty *vty, struct bgp *bgp, afi_t afi, + safi_t safi); +extern void bgp_damp_info_vty(struct vty *vty, struct bgp *bgp, + struct bgp_path_info *path, afi_t afi, + safi_t safi, json_object *json_path); extern const char *bgp_damp_reuse_time_vty(struct vty *vty, struct bgp_path_info *path, char *timebuf, size_t len, afi_t afi, @@ -153,5 +167,14 @@ extern const char *bgp_damp_reuse_time_vty(struct vty *vty, json_object *json); extern int bgp_show_dampening_parameters(struct vty *vty, afi_t, safi_t, uint8_t); +extern void bgp_peer_damp_enable(struct peer *peer, afi_t afi, safi_t safi, + time_t half, unsigned int reuse, + unsigned int suppress, time_t max); +extern void bgp_peer_damp_disable(struct peer *peer, afi_t afi, safi_t safi); +extern void bgp_config_write_peer_damp(struct vty *vty, struct peer *peer, + afi_t afi, safi_t safi); +extern void bgp_show_peer_dampening_parameters(struct vty *vty, + struct peer *peer, afi_t afi, + safi_t safi, bool use_json); #endif /* _QUAGGA_BGP_DAMP_H */ diff --git a/bgpd/bgp_memory.c b/bgpd/bgp_memory.c index f9aac35d0..0013eb2df 100644 --- a/bgpd/bgp_memory.c +++ b/bgpd/bgp_memory.c @@ -98,6 +98,7 @@ DEFINE_MTYPE(BGPD, PEER_UPDATE_SOURCE, "BGP peer update interface") DEFINE_MTYPE(BGPD, PEER_CONF_IF, "BGP peer config interface") DEFINE_MTYPE(BGPD, BGP_DAMP_INFO, "Dampening info") DEFINE_MTYPE(BGPD, BGP_DAMP_ARRAY, "BGP Dampening array") +DEFINE_MTYPE(BGPD, BGP_DAMP_REUSELIST, "BGP Dampening reuse list") DEFINE_MTYPE(BGPD, BGP_REGEXP, "BGP regexp") DEFINE_MTYPE(BGPD, BGP_AGGREGATE, "BGP aggregate") DEFINE_MTYPE(BGPD, BGP_ADDR, "BGP own address") diff --git a/bgpd/bgp_memory.h b/bgpd/bgp_memory.h index a95d9ef93..63998e95a 100644 --- a/bgpd/bgp_memory.h +++ b/bgpd/bgp_memory.h @@ -94,6 +94,7 @@ DECLARE_MTYPE(PEER_UPDATE_SOURCE) DECLARE_MTYPE(PEER_CONF_IF) DECLARE_MTYPE(BGP_DAMP_INFO) DECLARE_MTYPE(BGP_DAMP_ARRAY) +DECLARE_MTYPE(BGP_DAMP_REUSELIST) DECLARE_MTYPE(BGP_REGEXP) DECLARE_MTYPE(BGP_AGGREGATE) DECLARE_MTYPE(BGP_ADDR) diff --git a/bgpd/bgp_route.c b/bgpd/bgp_route.c index 0760bbd6a..31f6dc94e 100644 --- a/bgpd/bgp_route.c +++ b/bgpd/bgp_route.c @@ -208,9 +208,6 @@ void bgp_path_info_extra_free(struct bgp_path_info_extra **extra) return; e = *extra; - if (e->damp_info) - bgp_damp_info_free(e->damp_info, 0, e->damp_info->afi, - e->damp_info->safi); e->damp_info = NULL; if (e->parent) { @@ -3331,14 +3328,16 @@ static void bgp_rib_withdraw(struct bgp_dest *dest, struct bgp_path_info *pi, /* apply dampening, if result is suppressed, we'll be retaining * the bgp_path_info in the RIB for historical reference. */ - if (CHECK_FLAG(peer->bgp->af_flags[afi][safi], BGP_CONFIG_DAMPENING) - && peer->sort == BGP_PEER_EBGP) - if ((bgp_damp_withdraw(pi, dest, afi, safi, 0)) - == BGP_DAMP_SUPPRESSED) { - bgp_aggregate_decrement(peer->bgp, p, pi, afi, - safi); - return; + if (peer->sort == BGP_PEER_EBGP) { + if (get_active_bdc_from_pi(pi, afi, safi)) { + if (bgp_damp_withdraw(pi, dest, afi, safi, 0) + == BGP_DAMP_SUPPRESSED) { + bgp_aggregate_decrement(peer->bgp, p, pi, afi, + safi); + return; + } } + } #ifdef ENABLE_BGP_VNC if (safi == SAFI_MPLS_VPN) { @@ -3763,8 +3762,7 @@ int bgp_update(struct peer *peer, const struct prefix *p, uint32_t addpath_id, && (overlay_index_equal( afi, pi, evpn == NULL ? NULL : &evpn->gw_ip))) { - if (CHECK_FLAG(bgp->af_flags[afi][safi], - BGP_CONFIG_DAMPENING) + if (get_active_bdc_from_pi(pi, afi, safi) && peer->sort == BGP_PEER_EBGP && CHECK_FLAG(pi->flags, BGP_PATH_HISTORY)) { if (bgp_debug_update(peer, p, NULL, 1)) { @@ -3858,11 +3856,11 @@ int bgp_update(struct peer *peer, const struct prefix *p, uint32_t addpath_id, bgp_aggregate_decrement(bgp, p, pi, afi, safi); /* Update bgp route dampening information. */ - if (CHECK_FLAG(bgp->af_flags[afi][safi], BGP_CONFIG_DAMPENING) + if (get_active_bdc_from_pi(pi, afi, safi) && peer->sort == BGP_PEER_EBGP) { /* This is implicit withdraw so we should update - dampening - information. */ + * dampening information. + */ if (!CHECK_FLAG(pi->flags, BGP_PATH_HISTORY)) bgp_damp_withdraw(pi, dest, afi, safi, 1); } @@ -3985,7 +3983,7 @@ int bgp_update(struct peer *peer, const struct prefix *p, uint32_t addpath_id, #endif /* Update bgp route dampening information. */ - if (CHECK_FLAG(bgp->af_flags[afi][safi], BGP_CONFIG_DAMPENING) + if (get_active_bdc_from_pi(pi, afi, safi) && peer->sort == BGP_PEER_EBGP) { /* Now we do normal update dampening. */ ret = bgp_damp_update(pi, dest, afi, safi); @@ -10135,7 +10133,7 @@ void route_vty_out_detail(struct vty *vty, struct bgp *bgp, } if (path->extra && path->extra->damp_info) - bgp_damp_info_vty(vty, path, afi, safi, json_path); + bgp_damp_info_vty(vty, bgp, path, afi, safi, json_path); /* Remote Label */ if (path->extra && bgp_is_valid_label(&path->extra->label[0]) @@ -14085,7 +14083,8 @@ static int bgp_clear_damp_route(struct vty *vty, const char *view_name, if (pi->extra && pi->extra->damp_info) { pi_temp = pi->next; bgp_damp_info_free( - pi->extra->damp_info, + &pi->extra->damp_info, + &bgp->damp[afi][safi], 1, afi, safi); pi = pi_temp; } else @@ -14107,7 +14106,8 @@ static int bgp_clear_damp_route(struct vty *vty, const char *view_name, if (pi->extra && pi->extra->damp_info) { pi_temp = pi->next; bgp_damp_info_free( - pi->extra->damp_info, + &pi->extra->damp_info, + &bgp->damp[afi][safi], 1, afi, safi); pi = pi_temp; } else @@ -14130,7 +14130,9 @@ DEFUN (clear_ip_bgp_dampening, BGP_STR "Clear route flap dampening information\n") { - bgp_damp_info_clean(AFI_IP, SAFI_UNICAST); + VTY_DECLVAR_CONTEXT(bgp, bgp); + bgp_damp_info_clean(&bgp->damp[AFI_IP][SAFI_UNICAST], AFI_IP, + SAFI_UNICAST); return CMD_SUCCESS; } diff --git a/bgpd/bgpd.c b/bgpd/bgpd.c index 026b57193..190cd600b 100644 --- a/bgpd/bgpd.c +++ b/bgpd/bgpd.c @@ -2379,6 +2379,14 @@ int peer_delete(struct peer *peer) bgp_bfd_deregister_peer(peer); + /* Delete peer route flap dampening configuration. This needs to happen + * before removing the peer from peer groups. + */ + FOREACH_AFI_SAFI (afi, safi) + if (peer_af_flag_check(peer, afi, safi, + PEER_FLAG_CONFIG_DAMPENING)) + bgp_peer_damp_disable(peer, afi, safi); + /* If this peer belongs to peer group, clear up the relationship. */ if (peer->group) { @@ -3500,6 +3508,11 @@ int bgp_delete(struct bgp *bgp) BGP_TIMER_OFF(gr_info->t_route_select); } + /* Delete route flap dampening configuration */ + FOREACH_AFI_SAFI (afi, safi) { + bgp_damp_disable(bgp, afi, safi); + } + if (BGP_DEBUG(zebra, ZEBRA)) { if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT) zlog_debug("Deleting Default VRF"); diff --git a/bgpd/bgpd.h b/bgpd/bgpd.h index 16210bed1..8c22425b9 100644 --- a/bgpd/bgpd.h +++ b/bgpd/bgpd.h @@ -43,6 +43,7 @@ #include "bgp_labelpool.h" #include "bgp_addpath_types.h" #include "bgp_nexthop.h" +#include "bgp_damp.h" #define BGP_MAX_HOSTNAME 64 /* Linux max, is larger than most other sys */ #define BGP_PEER_MAX_HASH_SIZE 16384 @@ -695,6 +696,9 @@ struct bgp { uint32_t condition_filter_count; struct thread *t_condition_check; + /* BGP route flap dampening configuration */ + struct bgp_damp_config damp[AFI_MAX][SAFI_MAX]; + QOBJ_FIELDS }; DECLARE_QOBJ_TYPE(bgp) @@ -1197,6 +1201,9 @@ struct peer { /* Last update packet sent time */ time_t pkt_stime[AFI_MAX][SAFI_MAX]; + /* Peer / peer group route flap dampening configuration */ + struct bgp_damp_config damp[AFI_MAX][SAFI_MAX]; + /* Peer Per AF flags */ /* * Please consult the comments for *flags_override*, *flags_invert* and @@ -1234,6 +1241,8 @@ struct peer { #define PEER_FLAG_SEND_LARGE_COMMUNITY (1U << 26) /* Send large Communities */ #define PEER_FLAG_MAX_PREFIX_OUT (1U << 27) /* outgoing maximum prefix */ #define PEER_FLAG_MAX_PREFIX_FORCE (1U << 28) /* maximum-prefix <num> force */ +#define PEER_FLAG_CONFIG_DAMPENING (1U << 29) /* route flap dampening */ + enum bgp_addpath_strat addpath_type[AFI_MAX][SAFI_MAX]; |