From: Nathan Bahr <nbahr@atcorp.com>
Date: Fri, 25 Oct 2024 19:10:17 +0000 (+0000)
Subject: pimd: Update nexthops when lookup mode changes
X-Git-Tag: base_10.3~151^2~3
X-Git-Url: https://git.puffer.fish/?a=commitdiff_plain;h=9ce7f9b8e873fc287126af1bf07450f433685ce1;p=mirror%2Ffrr.git

pimd: Update nexthops when lookup mode changes

Link up the RPF lookup mode changing to a force update to RP's and
upstreams registered for nexthop lookup cache updates.

Signed-off-by: Nathan Bahr <nbahr@atcorp.com>
---

diff --git a/pimd/pim_nb_config.c b/pimd/pim_nb_config.c
index 596c949b0d..5b418f2597 100644
--- a/pimd/pim_nb_config.c
+++ b/pimd/pim_nb_config.c
@@ -1867,7 +1867,12 @@ int routing_control_plane_protocols_control_plane_protocol_pim_address_family_mc
 		old_mode = pim->rpf_mode;
 		pim->rpf_mode = yang_dnode_get_enum(args->dnode, NULL);
 
-		/* TODO: Signal to redo lookups? */
+		if (pim->rpf_mode != old_mode &&
+		    /* MCAST_MIX_MRIB_FIRST is the default if not configured */
+		    (old_mode != MCAST_NO_CONFIG && pim->rpf_mode != MCAST_MIX_MRIB_FIRST)) {
+			pim_nht_mode_changed(pim);
+		}
+
 		break;
 	}
 
diff --git a/pimd/pim_nht.h b/pimd/pim_nht.h
index 0d185aad03..144139f406 100644
--- a/pimd/pim_nht.h
+++ b/pimd/pim_nht.h
@@ -117,6 +117,9 @@ int pim_nht_lookup_ecmp_if_vif_index(struct pim_instance *pim, pim_addr src, str
 /* Tracked nexthop update from zebra */
 void pim_nexthop_update(struct vrf *vrf, struct prefix *match, struct zapi_route *nhr);
 
+/* RPF lookup mode changed via configuration */
+void pim_nht_mode_changed(struct pim_instance *pim);
+
 /* NHT init and finish funcitons */
 void pim_nht_init(struct pim_instance *pim);
 void pim_nht_terminate(struct pim_instance *pim);