Device - gNMI OpenConfig Driver:

- Added logic to free libyang objects on Interface handler

src/device/service/drivers/gnmi_openconfig/handlers/Interface.py

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import json, libyang, logging
+import json, libyang, logging, queue
 from typing import Any, Dict, List, Tuple
 from ._Handler import _Handler
 from .Tools import get_bool, get_int, get_str
@@ -43,30 +43,40 @@ class InterfaceHandler(_Handler):
         address_prefix = get_int (resource_value, 'address_prefix') # 24
         mtu            = get_int (resource_value, 'mtu'           ) # 1500
 
+        objects_to_free = queue.LifoQueue[libyang.DContainer]()
+
         yang_ifs : libyang.DContainer = yang_handler.get_data_path('/openconfig-interfaces:interfaces')
+        objects_to_free.put_nowait(yang_ifs)
         yang_if_path = 'interface[name="{:s}"]'.format(if_name)
         yang_if : libyang.DContainer = yang_ifs.create_path(yang_if_path)
+        objects_to_free.put_nowait(yang_if)
         yang_if.create_path('config/name',    if_name   )
         if enabled is not None: yang_if.create_path('config/enabled', enabled)
         if mtu     is not None: yang_if.create_path('config/mtu',     mtu)
 
         yang_sifs : libyang.DContainer = yang_if.create_path('subinterfaces')
+        objects_to_free.put_nowait(yang_sifs)
         yang_sif_path = 'subinterface[index="{:d}"]'.format(sif_index)
         yang_sif : libyang.DContainer = yang_sifs.create_path(yang_sif_path)
+        objects_to_free.put_nowait(yang_sif)
         yang_sif.create_path('config/index', sif_index)
         if enabled is not None: yang_sif.create_path('config/enabled', enabled)
 
         if vlan_id is not None:
             yang_subif_vlan : libyang.DContainer = yang_sif.create_path('openconfig-vlan:vlan')
+            objects_to_free.put_nowait(yang_subif_vlan)
             yang_subif_vlan.create_path('match/single-tagged/config/vlan-id', vlan_id)
 
         yang_ipv4 : libyang.DContainer = yang_sif.create_path('openconfig-if-ip:ipv4')
+        objects_to_free.put_nowait(yang_ipv4)
         if enabled is not None: yang_ipv4.create_path('config/enabled', enabled)
 
         if address_ip is not None and address_prefix is not None:
             yang_ipv4_addrs : libyang.DContainer = yang_ipv4.create_path('addresses')
+            objects_to_free.put_nowait(yang_ipv4_addrs)
             yang_ipv4_addr_path = 'address[ip="{:s}"]'.format(address_ip)
             yang_ipv4_addr : libyang.DContainer = yang_ipv4_addrs.create_path(yang_ipv4_addr_path)
+            objects_to_free.put_nowait(yang_ipv4_addr)
             yang_ipv4_addr.create_path('config/ip',            address_ip)
             yang_ipv4_addr.create_path('config/prefix-length', address_prefix)
 
@@ -75,6 +85,10 @@ class InterfaceHandler(_Handler):
         json_data = json.loads(str_data)
         json_data = json_data['openconfig-interfaces:interface'][0]
         str_data = json.dumps(json_data)
+
+        while not objects_to_free.empty():
+            obj = objects_to_free.get()
+            obj.free()
         return str_path, str_data
 
     def parse(