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bgpd: fix softreload bug in the RDE
On Tue, Apr 28, 2026 at 10:34:23AM +0200, Claudio Jeker wrote:
> In rde_reload_done() the code handling the peer->reconf_rib case has a
> continue which skips the code path that actually reapplies the outbound
> filters. This is a bug since the code needs to reapply the outbound
> filters for every peer.
>
> Removing the continue changes the way peer->reconf_rib and
> peer->reconf_out behave. Before only one of them was possible at any time
> but now in the reconf_rib case reconf_out is most probably also set.
> Because of this switch the order of checks in rde_softreconfig_in_done()
> so that reconf_rib has precedence.
ok tb
>
> Noticed while reworking the filters.
> --
> :wq Claudio
>
> Index: rde.c
> ===================================================================
> RCS file: /cvs/src/usr.sbin/bgpd/rde.c,v
> diff -u -p -r1.694 rde.c
> --- rde.c 27 Apr 2026 15:52:20 -0000 1.694
> +++ rde.c 28 Apr 2026 08:28:17 -0000
> @@ -4003,7 +4003,6 @@ rde_reload_done(void)
> fatal("%s: prefix_dump_new", __func__);
> log_peer_info(&peer->conf, "flushing Adj-RIB-Out");
> softreconfig++; /* account for the running flush */
> - continue;
> }
>
> /* reapply outbound filters for this peer */
> @@ -4213,7 +4212,13 @@ rde_softreconfig_in_done(void *arg, uint
> RB_FOREACH(peer, peer_tree, &peertable) {
> uint8_t aid;
>
> - if (peer->reconf_out) {
> + if (peer->reconf_rib) {
> + /* dump the full table to neighbors that changed rib */
> + for (aid = AID_MIN; aid < AID_MAX; aid++) {
> + if (peer->capa.mp[aid])
> + peer_dump(peer, aid);
> + }
> + } else if (peer->reconf_out) {
> if (peer->export_type == EXPORT_NONE) {
> /* nothing to do here */
> peer->reconf_out = 0;
> @@ -4227,12 +4232,6 @@ rde_softreconfig_in_done(void *arg, uint
> } else
> rib_byid(peer->loc_rib_id)->state =
> RECONF_RELOAD;
> - } else if (peer->reconf_rib) {
> - /* dump the full table to neighbors that changed rib */
> - for (aid = AID_MIN; aid < AID_MAX; aid++) {
> - if (peer->capa.mp[aid])
> - peer_dump(peer, aid);
> - }
> }
> }
>
>
bgpd: fix softreload bug in the RDE