Stale rif counter db removal (fix for sonic-net#2193)_ (sonic-net#2199)

To handle this , whenever RIF is deleted (removeRouterIntfs) , we ensure that these COUNTER_DB tables are deleted(handled in cleanUpRifFromCounterDb) .

Author: sumanbrcm

orchagent/intfsorch.cpp

@@ -1204,6 +1204,7 @@ bool IntfsOrch::removeRouterIntfs(Port &port)
 
     const auto id = sai_serialize_object_id(port.m_rif_id);
     removeRifFromFlexCounter(id, port.m_alias);
+    cleanUpRifFromCounterDb(id, port.m_alias);
 
     sai_status_t status = sai_router_intfs_api->remove_router_interface(port.m_rif_id);
     if (status != SAI_STATUS_SUCCESS)
@@ -1426,11 +1427,40 @@ void IntfsOrch::removeRifFromFlexCounter(const string &id, const string &name)
     SWSS_LOG_DEBUG("Unregistered interface %s from Flex counter", name.c_str());
 }
 
+void IntfsOrch::cleanUpRifFromCounterDb(const string &id, const string &name)
+{
+    SWSS_LOG_ENTER();
+    string counter_key = getRifCounterTableKey(id);
+    string rate_key = getRifRateTableKey(id);
+    string rate_init_key = getRifRateInitTableKey(id);
+    m_counter_db->del(counter_key);
+    m_counter_db->del(rate_key);
+    m_counter_db->del(rate_init_key);
+    SWSS_LOG_NOTICE("CleanUp interface %s oid %s from counter db", name.c_str(),id.c_str());
+}
+
 string IntfsOrch::getRifFlexCounterTableKey(string key)
 {
     return string(RIF_STAT_COUNTER_FLEX_COUNTER_GROUP) + ":" + key;
 }
 
+string IntfsOrch::getRifCounterTableKey(string key)
+{
+    return "COUNTERS:" + key;
+}
+
+string IntfsOrch::getRifRateTableKey(string key)
+{
+    return "RATES:" + key;
+}
+
+string IntfsOrch::getRifRateInitTableKey(string key)
+{
+    return "RATES:" + key + ":RIF";
+}
+
+
+
 void IntfsOrch::generateInterfaceMap()
 {
     m_updateMapsTimer->start();

orchagent/intfsorch.h

@@ -90,6 +90,10 @@ class IntfsOrch : public Orch
     unique_ptr<ProducerTable> m_flexCounterGroupTable;
 
     std::string getRifFlexCounterTableKey(std::string s);
+    std::string getRifCounterTableKey(std::string s);
+    std::string getRifRateTableKey(std::string s);
+    std::string getRifRateInitTableKey(std::string s);
+    void cleanUpRifFromCounterDb(const string &id, const string &name);
 
     bool addRouterIntfs(sai_object_id_t vrf_id, Port &port);
     bool removeRouterIntfs(Port &port);