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-rw-r--r--src/vnet/buffer.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/src/vnet/buffer.h b/src/vnet/buffer.h
index 7567b875248..045328816cd 100644
--- a/src/vnet/buffer.h
+++ b/src/vnet/buffer.h
@@ -317,9 +317,26 @@ typedef struct
{
union
{
+#if VLIB_BUFFER_TRACE_TRAJECTORY > 0
+ /* buffer trajectory tracing */
+ struct
+ {
+ u16 *trajectory_trace;
+ };
+#endif
+ u32 unused[12];
};
} vnet_buffer_opaque2_t;
+#define vnet_buffer2(b) ((vnet_buffer_opaque2_t *) (b)->opaque2)
+
+/*
+ * The opaque2 field of the vlib_buffer_t is intepreted as a
+ * vnet_buffer_opaque2_t. Hence it should be big enough to accommodate one.
+ */
+STATIC_ASSERT (sizeof (vnet_buffer_opaque2_t) <=
+ STRUCT_SIZE_OF (vlib_buffer_t, opaque2),
+ "VNET buffer opaque2 meta-data too large for vlib_buffer");
#endif /* included_vnet_buffer_h */