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+
+/*
+ * mdata.h - Buffer metadata change tracker
+ *
+ * Copyright (c) 2019 Cisco and/or its affiliates.
+ * 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
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef __included_mdata_h__
+#define __included_mdata_h__
+
+#include <vnet/vnet.h>
+
+#include <vppinfra/hash.h>
+#include <vppinfra/error.h>
+
+/** @file buffer metadata change tracker definitions
+ */
+
+typedef struct
+{
+ /** Node index, ~0 means no data from this run */
+ u32 node_index;
+ /** buffer metadata, cast to vlib_buffer_t as needed */
+ u8 mdata[128];
+} mdata_t;
+
+typedef struct
+{
+ /** API message ID base */
+ u16 msg_id_base;
+
+ /** Per-thread buffer metadata before calling node fcn */
+ mdata_t **before_per_thread;
+
+ /** Spinlock to protect modified metadata by node */
+ clib_spinlock_t modify_lock;
+
+ /** Modified metadata by node */
+ mdata_t *modifies;
+
+ /* convenience */
+ vlib_main_t *vlib_main;
+ vnet_main_t *vnet_main;
+} mdata_main_t;
+
+extern mdata_main_t mdata_main;
+
+#endif /* __included_mdata_h__ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */