zebra: Uninstall nexthops on shutdown

Add functionality to uninstall nexthops we created on shutdown.
To account for this, I added in a function for zebra_router
cleanup in a shutdown event.

Signed-off-by: Stephen Worley <sworley@cumulusnetworks.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/zebra/zebra_router.c b/zebra/zebra_router.c
index 408fc16dd1..b85319df73 100644
--- a/zebra/zebra_router.c
+++ b/zebra/zebra_router.c
@@ -266,3 +266,14 @@ void zebra_router_init(void)
 		hash_create_size(8, zebra_nhg_id_key, zebra_nhg_hash_id_equal,
 				 "Zebra Router Nexthop Groups ID index");
 }
+
+/**
+ * zebra_router_cleanup() - Perform any cleanup actions before termination
+ *
+ * Right now this is just being used to clear the nexthops we installed in
+ * the kernel on shutdown before the routes are cleaned via vrf_terminated().
+ */
+void zebra_router_cleanup(void)
+{
+	zebra_nhg_cleanup_tables();
+}