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bgpd: Move stale Adj-RIB-Out paths removal to subgroup_process_announce_selected()

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Signed-off-by: Donatas Abraitis <donatas@opensourcerouting.org>
This commit is contained in:
Donatas Abraitis 2025-03-14 11:46:51 +02:00
parent 4c79c560d1
commit f47b2fb94a
2 changed files with 22 additions and 30 deletions
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23
bgpd/bgp_route.c
View file

@ -3406,13 +3406,14 @@ void subgroup_process_announce_selected(struct update_subgroup *subgrp,
safi_t safi, uint32_t addpath_tx_id)
{
const struct prefix *p;
struct peer *onlypeer;
struct peer *onlypeer, *peer;
struct attr attr = { 0 }, *pattr = &attr;
struct bgp *bgp;
bool advertise;
p = bgp_dest_get_prefix(dest);
bgp = SUBGRP_INST(subgrp);
peer = SUBGRP_PEER(subgrp);
onlypeer = ((SUBGRP_PCOUNT(subgrp) == 1) ? (SUBGRP_PFIRST(subgrp))->peer
: NULL);
@ -3447,6 +3448,26 @@ void subgroup_process_announce_selected(struct update_subgroup *subgrp,
pattr,
selected))
bgp_attr_flush(pattr);
/* Remove paths from Adj-RIB-Out if it's not a best (selected) path.
* Why should we keep Adj-RIB-Out with stale paths?
*/
if (!bgp_addpath_encode_tx(peer, afi, safi)) {
struct bgp_adj_out *adj, *adj_next;
RB_FOREACH_SAFE (adj, bgp_adj_out_rb,
&dest->adj_out, adj_next) {
if (adj->subgroup != subgrp)
continue;
if (!adj->adv &&
adj->addpath_tx_id != addpath_tx_id) {
bgp_adj_out_unset_subgroup(dest,
subgrp, 1,
adj->addpath_tx_id);
}
}
}
} else {
bgp_adj_out_unset_subgroup(
dest, subgrp, 1, addpath_tx_id);

29
bgpd/bgp_updgrp_adv.c
View file

@ -216,7 +216,6 @@ static int group_announce_route_walkcb(struct update_group *updgrp, void *arg)
safi_t safi;
struct peer *peer;
struct bgp_adj_out *adj, *adj_next;
struct bgp_path_info *bpi;
bool addpath_capable;
afi = UPDGRP_AFI(updgrp);
@ -276,34 +275,6 @@ static int group_announce_route_walkcb(struct update_group *updgrp, void *arg)
subgrp, ctx->pi, ctx->dest, afi, safi,
bgp_addpath_id_for_peer(peer, afi, safi,
&ctx->pi->tx_addpath));
/* Remove paths from Adj-RIB-Out if it's not a best path.
* Why should we keep Adj-RIB-Out with stale paths?
*/
RB_FOREACH_SAFE (adj, bgp_adj_out_rb, &ctx->dest->adj_out,
adj_next) {
uint32_t best_tx_id = 0;
if (adj->subgroup != subgrp)
continue;
for (bpi = bgp_dest_get_bgp_path_info(ctx->dest); bpi;
bpi = bpi->next) {
if (bgp_addpath_id_for_peer(peer, afi, safi,
&bpi->tx_addpath) ==
adj->addpath_tx_id &&
CHECK_FLAG(bpi->flags, BGP_PATH_SELECTED)) {
best_tx_id = adj->addpath_tx_id;
break;
}
}
if (adj->addpath_tx_id != best_tx_id)
subgroup_process_announce_selected(subgrp, NULL,
ctx->dest, afi,
safi,
adj->addpath_tx_id);
}
} else {
RB_FOREACH_SAFE (adj, bgp_adj_out_rb, &ctx->dest->adj_out,
adj_next) {