[Namespace]: Fix interface counters in RFC 1213 (sonic-net#145)

* [Namespace]: Fix interface counters in RFC 1213 for
multi-asic platforms. In multi-asic platform, SAI OID is not
unique for the whole device. Fix implementation to make sure
that interfaces counters is keyed based on interface index.

Signed-off-by: SuvarnaMeenakshi <sumeenak@microsoft.com>

src/sonic_ax_impl/mibs/__init__.py

@@ -148,7 +148,7 @@ def get_sai_id_key(namespace, sai_id):
     Return value: namespace:sai id or sai id
     """
     if namespace != '':
-        return  namespace.encode() + b':' + sai_id
+        return namespace.encode() + b':' + sai_id
     else:
         return sai_id
 
@@ -213,20 +213,26 @@ def init_sync_d_interface_tables(db_conn):
     Initializes interface maps for SyncD-connected MIB(s).
     :return: tuple(if_name_map, if_id_map, oid_map, if_alias_map)
     """
+    if_id_map = {}
+    if_name_map = {}
 
     # { if_name (SONiC) -> sai_id }
     # ex: { "Ethernet76" : "1000000000023" }
-    if_name_map, if_id_map = port_util.get_interface_oid_map(db_conn)
-    if_name_map = {if_name: sai_id for if_name, sai_id in if_name_map.items() if \
-                   (re.match(port_util.SONIC_ETHERNET_RE_PATTERN, if_name.decode()) or \
-                    re.match(port_util.SONIC_ETHERNET_BP_RE_PATTERN, if_name.decode()))}
+    if_name_map_util, if_id_map_util = port_util.get_interface_oid_map(db_conn)
+    for if_name, sai_id in if_name_map_util.items():
+        if_name_str = if_name.decode()
+        if (re.match(port_util.SONIC_ETHERNET_RE_PATTERN, if_name_str) or \
+                re.match(port_util.SONIC_ETHERNET_BP_RE_PATTERN, if_name_str)):
+            if_name_map[if_name] = sai_id
     # As sai_id is not unique in multi-asic platform, concatenate it with
     # namespace to get a unique key. Assuming that ':' is not present in namespace
     # string or in sai id.
     # sai_id_key = namespace : sai_id
-    if_id_map = {get_sai_id_key(db_conn.namespace, sai_id): if_name for sai_id, if_name in if_id_map.items() if \
-                 (re.match(port_util.SONIC_ETHERNET_RE_PATTERN, if_name.decode()) or \
-                  re.match(port_util.SONIC_ETHERNET_BP_RE_PATTERN, if_name.decode()))}
+    for sai_id, if_name in if_id_map_util.items():
+        if_name = if_name.decode()
+        if (re.match(port_util.SONIC_ETHERNET_RE_PATTERN, if_name) or \
+                re.match(port_util.SONIC_ETHERNET_BP_RE_PATTERN, if_name)):
+            if_id_map[get_sai_id_key(db_conn.namespace, sai_id)] = if_name
     logger.debug("Port name map:\n" + pprint.pformat(if_name_map, indent=2))
     logger.debug("Interface name map:\n" + pprint.pformat(if_id_map, indent=2))
 

src/sonic_ax_impl/mibs/ietf/rfc1213.py

@@ -152,7 +152,7 @@ class InterfacesUpdater(MIBUpdater):
 
     def __init__(self):
         super().__init__()
-        self.db_conn = Namespace.init_namespace_dbs() 
+        self.db_conn = Namespace.init_namespace_dbs()
 
         self.lag_name_if_name_map = {}
         self.if_name_lag_name_map = {}
@@ -168,6 +168,7 @@ def __init__(self):
         self.if_id_map = {}
         self.oid_sai_map = {}
         self.oid_name_map = {}
+        self.namespace_db_map = Namespace.get_namespace_db_map(self.db_conn)
 
     def reinit_data(self):
         """
@@ -191,9 +192,11 @@ def update_data(self):
         Update redis (caches config)
         Pulls the table references for each interface.
         """
-        self.if_counters = \
-            {sai_id: Namespace.dbs_get_all(self.db_conn, mibs.COUNTERS_DB, mibs.counter_table(sai_id), blocking=True)
-            for sai_id in self.if_id_map}
+        for sai_id_key in self.if_id_map:
+            namespace, sai_id = mibs.split_sai_id_key(sai_id_key)
+            if_idx = mibs.get_index_from_str(self.if_id_map[sai_id_key])
+            self.if_counters[if_idx] = self.namespace_db_map[namespace].get_all(mibs.COUNTERS_DB, \
+                    mibs.counter_table(sai_id), blocking=True)
 
         self.lag_name_if_name_map, \
         self.if_name_lag_name_map, \
@@ -254,12 +257,11 @@ def _get_counter(self, oid, table_name):
         :param table_name: the redis table (either IntEnum or string literal) to query.
         :return: the counter for the respective sub_id/table.
         """
-        sai_id = self.oid_sai_map[oid]
         # Enum.name or table_name = 'name_of_the_table'
         _table_name = bytes(getattr(table_name, 'name', table_name), 'utf-8')
 
         try:
-            counter_value = self.if_counters[sai_id][_table_name]
+            counter_value = self.if_counters[oid][_table_name]
             # truncate to 32-bit counter (database implements 64-bit counters)
             counter_value = int(counter_value) & 0x00000000ffffffff
             # done!

src/sonic_ax_impl/mibs/ietf/rfc2863.py

@@ -4,7 +4,6 @@
 from sonic_ax_impl import mibs
 from ax_interface.mib import MIBMeta, MIBUpdater, ValueType, SubtreeMIBEntry, OverlayAdpaterMIBEntry, OidMIBEntry
 from sonic_ax_impl.mibs import Namespace
-from swsssdk.port_util import get_index_from_str
 
 @unique
 class DbTables32(int, Enum):
@@ -103,7 +102,7 @@ def update_data(self):
         """
         for sai_id_key in self.if_id_map:
             namespace, sai_id = mibs.split_sai_id_key(sai_id_key)
-            if_idx = get_index_from_str(self.if_id_map[sai_id_key].decode())
+            if_idx = mibs.get_index_from_str(self.if_id_map[sai_id_key])
             self.if_counters[if_idx] = self.namespace_db_map[namespace].get_all(mibs.COUNTERS_DB, \
                     mibs.counter_table(sai_id), blocking=True)
 

src/sonic_ax_impl/mibs/ietf/rfc4363.py

@@ -74,7 +74,7 @@ def update_data(self):
             port_id = self.if_bpid_map[bridge_port_id]
 
             vlanmac = self.fdb_vlanmac(fdb)
-            self.vlanmac_ifindex_map[vlanmac] = mibs.get_index(self.if_id_map[port_id])
+            self.vlanmac_ifindex_map[vlanmac] = mibs.get_index_from_str(self.if_id_map[port_id])
             self.vlanmac_ifindex_list.append(vlanmac)
         self.vlanmac_ifindex_list.sort()
 

tests/namespace/test_interfaces.py

@@ -22,8 +22,6 @@
 class TestGetNextPDU(TestCase):
     @classmethod
     def setUpClass(cls):
-        cls.skipTest(cls, "TODO: Need to update corresponding MIB implementation \
-                in the Snmp Agent for multiple namespaces/multi-asic")
         tests.mock_tables.dbconnector.load_namespace_config()
         importlib.reload(rfc1213)
         cls.lut = MIBTable(rfc1213.InterfacesMIB)