[Dynamic Buffer Calc] Enhance the field checking in table handling (sonic-net#1680)

* Fix a typo in test_buffer_dynamic.py and enhance a field name check
* Use "else if" instead of "if"

Signed-off-by: Stephen Sun <stephens@nvidia.com>

Author: stephenxs

cfgmgr/buffermgrdyn.cpp

@@ -1376,15 +1376,15 @@ task_process_status BufferMgrDynamic::handleBufferPoolTable(KeyOpFieldsValuesTup
             {
                 bufferPool.dynamic_size = false;
             }
-            if (field == buffer_pool_xoff_field_name)
+            else if (field == buffer_pool_xoff_field_name)
             {
                 newSHPSize = value;
             }
-            if (field == buffer_pool_mode_field_name)
+            else if (field == buffer_pool_mode_field_name)
             {
                 bufferPool.mode = value;
             }
-            if (field == buffer_pool_type_field_name)
+            else if (field == buffer_pool_type_field_name)
             {
                 bufferPool.ingress = (value == buffer_value_ingress);
             }
@@ -1503,32 +1503,32 @@ task_process_status BufferMgrDynamic::handleBufferProfileTable(KeyOpFieldsValues
                     return task_process_status::task_failed;
                 }
             }
-            if (field == buffer_xon_field_name)
+            else if (field == buffer_xon_field_name)
             {
                 profileApp.xon = value;
             }
-            if (field == buffer_xoff_field_name)
+            else if (field == buffer_xoff_field_name)
             {
                 profileApp.xoff = value;
                 profileApp.lossless = true;
             }
-            if (field == buffer_xon_offset_field_name)
+            else if (field == buffer_xon_offset_field_name)
             {
                 profileApp.xon_offset = value;
             }
-            if (field == buffer_size_field_name)
+            else if (field == buffer_size_field_name)
             {
                 profileApp.size = value;
             }
-            if (field == buffer_dynamic_th_field_name)
+            else if (field == buffer_dynamic_th_field_name)
             {
                 profileApp.threshold = value;
             }
-            if (field == buffer_static_th_field_name)
+            else if (field == buffer_static_th_field_name)
             {
                 profileApp.threshold = value;
             }
-            if (field == buffer_headroom_type_field_name)
+            else if (field == buffer_headroom_type_field_name)
             {
                 profileApp.dynamic_calculated = (value == "dynamic");
                 if (profileApp.dynamic_calculated)
@@ -1692,6 +1692,13 @@ task_process_status BufferMgrDynamic::handleOneBufferPgEntry(const string &key,
                 bufferPg.static_configured = true;
                 bufferPg.configured_profile_name = profileName;
             }
+
+            if (field != buffer_profile_field_name)
+            {
+                SWSS_LOG_ERROR("BUFFER_PG: Invalid field %s", field.c_str());
+                return task_process_status::task_invalid_entry;
+            }
+
             fvVector.emplace_back(field, value);
             SWSS_LOG_INFO("Inserting BUFFER_PG table field %s value %s", field.c_str(), value.c_str());
         }

tests/test_buffer_dynamic.py

@@ -328,7 +328,7 @@ def test_headroomOverride(self, dvs, testlog):
         self.app_db.wait_for_deleted_entry("BUFFER_PG_TABLE", "Ethernet0:6")
 
         # readd lossless PG with dynamic profile
-        self.config_db.update_entry('BUFFER_PG', 'Ethernet0|3-4', {'profie': 'NULL'})
+        self.config_db.update_entry('BUFFER_PG', 'Ethernet0|3-4', {'profile': 'NULL'})
         self.app_db.wait_for_field_match("BUFFER_PG_TABLE", "Ethernet0:3-4", {"profile": "[BUFFER_PROFILE_TABLE:" + expectedProfile + "]"})
 
         # remove the headroom override profile