bgpd: release label to labelpool on dereg

when we de-register for a label associated with a prefix then release
it back to the labelpool to clean up the stale reference held in the
ledger and inuse lists.

Signed-off-by: Pat Ruddy <pat@voltanet.io>

diff --git a/bgpd/bgp_label.c b/bgpd/bgp_label.c
index 4d39b888397c3d78173443bd6e26ee5632caf0c1..5a31bd0243ee9298f3a449a24530f1d24a4be07f 100644 (file)
--- a/bgpd/bgp_label.c
+++ b/bgpd/bgp_label.c
@@ -277,8 +277,11 @@ void bgp_reg_dereg_for_label(struct bgp_dest *dest, struct bgp_path_info *pi,
                                return;
                        }
                }
-       } else
+       } else {
                UNSET_FLAG(dest->flags, BGP_NODE_LABEL_REQUESTED);
+               bgp_lp_release(LP_TYPE_BGP_LU, dest,
+                              label_pton(&dest->local_label));
+       }
 
        bgp_send_fec_register_label_msg(
                dest, reg, with_label_index ? pi->attr->label_index : 0);