+static u32
+add_del_mac (gid_dictionary_t * db, u32 vni, u8 * mac, u32 val, u8 is_add)
+{
+ BVT(clib_bihash_kv) kv, value;
+ u32 old_val = ~0;
+
+ kv.key[0] = ((u64 *)mac)[0];
+ kv.key[1] = (u64)vni;
+ kv.key[2] = 0;
+
+ if (BV(clib_bihash_search) (&db->mac_lookup_table, &kv, &value) == 0)
+ old_val = value.value;
+
+ if (!is_add)
+ BV(clib_bihash_add_del) (&db->mac_lookup_table, &kv, 0 /* is_add */);
+ else
+ {
+ kv.value = val;
+ BV(clib_bihash_add_del) (&db->mac_lookup_table, &kv, 1 /* is_add */);
+ }
+ return old_val;
+}
+