Support for ACL extensions in metadata (opencomputeproject#1178)

SAI sanitychecker doesn't expect any extensions to be developed for ACL attributes. This PR aims to add support by adding checks whether the 'under-check-attribute' is an extension attribute. The value range for an attribute between SAI_ACL_ENTRY_ATTR_ACTION_START and SAI_ACL_ENTRY_ATTR_ACTION_END is valid only for non-extensions. The extensions are to have attributes beyond SAI_ACL_ENTRY_ATTR_ACTION_END. This PR allows the range check to be conditional for extension attributes.

meta/saisanitycheck.c

@@ -435,6 +435,11 @@ bool sai_metadata_is_acl_field_or_action(
         {
             return true;
         }
+
+        if (metadata->isextensionattr)
+        {
+            return true;
+        }
     }
 
     return false;
@@ -1890,8 +1895,13 @@ void check_attr_acl_fields(
         case SAI_ATTR_VALUE_TYPE_ACL_ACTION_DATA_OBJECT_ID:
         case SAI_ATTR_VALUE_TYPE_ACL_ACTION_DATA_OBJECT_LIST:
 
-            if (md->objecttype != SAI_OBJECT_TYPE_ACL_ENTRY ||
-                    md->attrid < SAI_ACL_ENTRY_ATTR_ACTION_START ||
+            if (md->objecttype == SAI_OBJECT_TYPE_ACL_ENTRY && md->isextensionattr)
+            {
+                break;
+            }
+
+            if (md->objecttype != SAI_OBJECT_TYPE_ACL_ENTRY  ||
+                    md->attrid < SAI_ACL_ENTRY_ATTR_ACTION_START  ||
                     md->attrid > SAI_ACL_ENTRY_ATTR_ACTION_END)
             {
                 META_MD_ASSERT_FAIL(md, "acl action may only be set on acl action");
@@ -4112,7 +4122,7 @@ void check_acl_entry_actions()
             break;
         }
 
-        if (meta->attrid > SAI_ACL_ENTRY_ATTR_ACTION_END)
+        if ((meta->isextensionattr == false) && (meta->attrid > SAI_ACL_ENTRY_ATTR_ACTION_END))
         {
             break;
         }