[meta] Add support for port stat extensions (opencomputeproject#1947)

Will be required for DASH port stat extensions

Co-authored-by: r12f <r12f.code@gmail.com>

experimental/saiextensions.h

@@ -31,6 +31,7 @@
 /* existing enum extensions */
 #include "saitypesextensions.h"
 #include "saiswitchextensions.h"
+#include "saiportextensions.h"
 
 /* new experimental object type includes */
 #include "saiexperimentaldashvip.h"

experimental/saiportextensions.h

@@ -0,0 +1,61 @@
+/**
+ * Copyright (c) 2018 Microsoft Open Technologies, Inc.
+ *
+ *    Licensed under the Apache License, Version 2.0 (the "License"); you may
+ *    not use this file except in compliance with the License. You may obtain
+ *    a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *    THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR
+ *    CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT
+ *    LIMITATION ANY IMPLIED WARRANTIES OR CONDITIONS OF TITLE, FITNESS
+ *    FOR A PARTICULAR PURPOSE, MERCHANTABILITY OR NON-INFRINGEMENT.
+ *
+ *    See the Apache Version 2.0 License for specific language governing
+ *    permissions and limitations under the License.
+ *
+ *    Microsoft would like to thank the following companies for their review and
+ *    assistance with these files: Intel Corporation, Mellanox Technologies Ltd,
+ *    Dell Products, L.P., Facebook, Inc., Marvell International Ltd.
+ *
+ * @file    saiportextensions.h
+ *
+ * @brief   This module defines port extensions of the Switch Abstraction Interface (SAI)
+ */
+
+#ifndef __SAIPORTEXTENSIONS_H_
+#define __SAIPORTEXTENSIONS_H_
+
+#include <saiport.h>
+#include <saitypes.h>
+
+/**
+ * @brief SAI port attribute extensions.
+ *
+ * @flags free
+ */
+typedef enum _sai_port_attr_extensions_t
+{
+    SAI_PORT_ATTR_EXTENSIONS_RANGE_START = SAI_PORT_ATTR_END,
+
+    /* Add new experimental port attributes above this line */
+
+    SAI_PORT_ATTR_EXTENSIONS_RANGE_END
+
+} sai_port_attr_extensions_t;
+
+/**
+ * @brief SAI port stat extensions.
+ *
+ * @flags free
+ */
+typedef enum _sai_port_stat_extensions_t
+{
+    SAI_PORT_STAT_EXTENSIONS_RANGE_START = SAI_PORT_STAT_END,
+
+    /* Add new experimental port stats above this line */
+
+    SAI_PORT_STAT_EXTENSIONS_RANGE_END
+
+} sai_port_stat_extensions_t;
+
+#endif /* __SAIPORTEXTENSIONS_H_ */

inc/saiport.h

@@ -2505,8 +2505,11 @@ typedef enum _sai_port_attr_t
  */
 typedef enum _sai_port_stat_t
 {
+    /** Port stat range start */
+    SAI_PORT_STAT_START,
+
     /** SAI port stat if in octets */
-    SAI_PORT_STAT_IF_IN_OCTETS,
+    SAI_PORT_STAT_IF_IN_OCTETS = SAI_PORT_STAT_START,
 
     /** SAI port stat if in ucast pkts */
     SAI_PORT_STAT_IF_IN_UCAST_PKTS,
@@ -3217,6 +3220,9 @@ typedef enum _sai_port_stat_t
     /** Port stat out drop reasons range end */
     SAI_PORT_STAT_OUT_DROP_REASON_RANGE_END = 0x00002fff,
 
+    /** Port stat range end */
+    SAI_PORT_STAT_END
+
 } sai_port_stat_t;
 
 /**