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bgpd: advertise/withdraw new added/deleted type-5 routes
Signed-off-by: Mitesh Kanjariya <mitesh@cumulusnetworks.com>
This commit is contained in:
Mitesh Kanjariya
parent
90264d64ef
commit
5424b7bad8
109
bgpd/bgp_evpn.c
109
bgpd/bgp_evpn.c
@ -956,7 +956,7 @@ static int evpn_route_is_sticky(struct bgp *bgp, struct bgp_node *rn)
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static int update_evpn_type5_route_entry(struct bgp *bgp_def,
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struct bgp *bgp_vrf, afi_t afi,
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safi_t safi, struct bgp_node *rn,
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struct attr *attr)
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struct attr *attr, int *route_changed)
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{
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struct attr *attr_new = NULL;
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struct bgp_info *ri = NULL;
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@ -964,7 +964,7 @@ static int update_evpn_type5_route_entry(struct bgp *bgp_def,
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struct bgp_info *local_ri = NULL;
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struct bgp_info *tmp_ri = NULL;
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*route_changed = 0;
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/* locate the local route entry if any */
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for (tmp_ri = rn->info; tmp_ri; tmp_ri = tmp_ri->next) {
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if (tmp_ri->peer == bgp_def->peer_self
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@ -977,6 +977,9 @@ static int update_evpn_type5_route_entry(struct bgp *bgp_def,
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Otherwise see if route attr has changed */
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if (!local_ri) {
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/* route has changed as this is the first entry */
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*route_changed = 1;
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/* Add (or update) attribute to hash. */
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attr_new = bgp_attr_intern(attr);
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@ -996,6 +999,10 @@ static int update_evpn_type5_route_entry(struct bgp *bgp_def,
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tmp_ri = local_ri;
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if (!attrhash_cmp(tmp_ri->attr, attr)) {
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/* attribute changed */
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*route_changed = 1;
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/* The attribute has changed. */
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/* Add (or update) attribute to hash. */
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attr_new = bgp_attr_intern(attr);
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@ -1023,6 +1030,7 @@ static int update_evpn_type5_route(struct bgp *bgp_vrf,
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struct attr attr;
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struct bgp_node *rn = NULL;
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struct bgp *bgp_def = NULL;
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int route_changed = 0;
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bgp_def = bgp_get_default();
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if (!bgp_def)
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@ -1048,11 +1056,13 @@ static int update_evpn_type5_route(struct bgp *bgp_vrf,
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/* create or update the route entry within the route node */
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update_evpn_type5_route_entry(bgp_def, bgp_vrf,
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afi, safi,
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rn, &attr);
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rn, &attr, &route_changed);
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/* schedule for processing and unlock node */
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bgp_process(bgp_def, rn, afi, safi);
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bgp_unlock_node(rn);
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if (route_changed) {
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bgp_process(bgp_def, rn, afi, safi);
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bgp_unlock_node(rn);
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}
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/* uninten temporary */
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aspath_unintern(&attr.aspath);
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@ -3055,6 +3065,25 @@ static void bgp_evpn_handle_export_rt_change_for_vrf(struct bgp *bgp_vrf)
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* Public functions.
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*/
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/* withdraw type-5 route corresponding to ip prefix */
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void bgp_evpn_withdraw_type5_route(struct bgp *bgp_vrf, struct bgp_node *rn,
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afi_t afi, safi_t safi)
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{
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int ret = 0;
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struct prefix_evpn evp;
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char buf[PREFIX_STRLEN];
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build_type5_prefix_from_ip_prefix(&evp, &rn->p);
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ret = delete_evpn_type5_route(bgp_vrf, &evp);
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if (ret) {
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zlog_err(
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"%u failed to delete type-5 route for prefix %s in vrf %s",
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bgp_vrf->vrf_id,
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prefix2str(&rn->p, buf, sizeof(buf)),
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vrf_id_to_name(bgp_vrf->vrf_id));
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}
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}
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/* withdraw all type-5 routes for an address family */
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void bgp_evpn_withdraw_type5_routes(struct bgp *bgp_vrf,
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afi_t afi, safi_t safi)
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@ -3066,21 +3095,37 @@ void bgp_evpn_withdraw_type5_routes(struct bgp *bgp_vrf,
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return;
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table = bgp_vrf->rib[afi][safi];
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for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) {
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for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn))
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bgp_evpn_withdraw_type5_route(bgp_vrf, rn, afi, safi);
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int ret = 0;
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struct prefix_evpn evp;
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char buf[PREFIX_STRLEN];
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}
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build_type5_prefix_from_ip_prefix(&evp, &rn->p);
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ret = delete_evpn_type5_route(bgp_vrf, &evp);
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if (ret) {
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zlog_err(
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"%u failed to delete type-5 route for prefix %s in vrf %s",
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bgp_vrf->vrf_id,
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prefix2str(&rn->p, buf, sizeof(buf)),
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vrf_id_to_name(bgp_vrf->vrf_id));
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}
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/* advertise ip prefix as type-5 route*/
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void bgp_evpn_advertise_type5_route(struct bgp *bgp_vrf, struct bgp_node *rn,
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afi_t afi, safi_t safi)
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{
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int ret = 0;
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struct prefix_evpn evp;
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char buf[PREFIX_STRLEN];
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if (!advertise_type5_routes(bgp_vrf, afi))
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return;
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if (!rn->info)
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return;
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/* only advertise subnet routes as type-5 */
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if (is_host_route(&rn->p))
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return;
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build_type5_prefix_from_ip_prefix(&evp, &rn->p);
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ret = update_evpn_type5_route(bgp_vrf, &evp);
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if (ret) {
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zlog_err(
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"%u failed to create type-5 route for prefix %s in vrf %s",
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bgp_vrf->vrf_id,
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prefix2str(&rn->p, buf, sizeof(buf)),
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vrf_id_to_name(bgp_vrf->vrf_id));
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}
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}
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@ -3091,33 +3136,9 @@ void bgp_evpn_advertise_type5_routes(struct bgp *bgp_vrf,
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struct bgp_table *table = NULL;
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struct bgp_node *rn = NULL;
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if (!advertise_type5_routes(bgp_vrf, afi))
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return;
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table = bgp_vrf->rib[afi][safi];
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for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) {
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int ret = 0;
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struct prefix_evpn evp;
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char buf[PREFIX_STRLEN];
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if (!rn->info)
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continue;
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/* only advertise subnet routes as type-5 */
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if (is_host_route(&rn->p))
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continue;
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build_type5_prefix_from_ip_prefix(&evp, &rn->p);
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ret = update_evpn_type5_route(bgp_vrf, &evp);
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if (ret) {
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zlog_err(
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"%u failed to create type-5 route for prefix %s in vrf %s",
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bgp_vrf->vrf_id,
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prefix2str(&rn->p, buf, sizeof(buf)),
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vrf_id_to_name(bgp_vrf->vrf_id));
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}
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}
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for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn))
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bgp_evpn_advertise_type5_route(bgp_vrf, rn, afi, safi);
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}
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void evpn_rt_delete_auto(struct bgp *bgp, vni_t vni,
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@ -34,6 +34,12 @@ static inline int is_evpn_enabled(void)
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return bgp ? bgp->advertise_all_vni : 0;
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}
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extern void bgp_evpn_advertise_type5_route(struct bgp *bgp_vrf,
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struct bgp_node *rn,
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afi_t afi, safi_t safi);
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extern void bgp_evpn_withdraw_type5_route(struct bgp *bgp_vrf,
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struct bgp_node *rn,
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afi_t afi, safi_t safi);
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extern void bgp_evpn_withdraw_type5_routes(struct bgp *bgp_vrf, afi_t afi,
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safi_t safi);
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extern void bgp_evpn_advertise_type5_routes(struct bgp *bgp_vrf, afi_t afi,
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@ -2219,6 +2219,14 @@ static void bgp_process_main_one(struct bgp *bgp, struct bgp_node *rn,
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}
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}
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/* advertise/withdraw type-5 routes */
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if ((afi == AFI_IP || afi == AFI_IP6) && (safi == SAFI_UNICAST)) {
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if (new_select)
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bgp_evpn_advertise_type5_route(bgp, rn, afi, safi);
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else if (old_select)
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bgp_evpn_withdraw_type5_route(bgp, rn, afi, safi);
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}
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/* Clear any route change flags. */
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bgp_zebra_clear_route_change_flags(rn);
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