#define VLIB_BUFFER_TRACE_TRAJECTORY 0
#endif /* VLIB_BUFFER_TRACE_TRAJECTORY */
+#define vlib_buffer_template_fields \
+ /** signed offset in data[], pre_data[] that we are currently \
+ * processing. If negative current header points into predata area. */ \
+ i16 current_data; \
+ \
+ /** Nbytes between current data and the end of this buffer. */ \
+ u16 current_length; \
+ /** buffer flags: \
+ <br> VLIB_BUFFER_FREE_LIST_INDEX_MASK: bits used to store free list \
+ index, <br> VLIB_BUFFER_IS_TRACED: trace this buffer. <br> \
+ VLIB_BUFFER_NEXT_PRESENT: this is a multi-chunk buffer. <br> \
+ VLIB_BUFFER_TOTAL_LENGTH_VALID: as it says <br> \
+ VLIB_BUFFER_EXT_HDR_VALID: buffer contains valid external buffer manager \
+ header, set to avoid adding it to a flow report <br> \
+ VLIB_BUFFER_FLAG_USER(n): user-defined bit N \
+ */ \
+ u32 flags; \
+ \
+ /** Generic flow identifier */ \
+ u32 flow_id; \
+ \
+ /** Reference count for this buffer. */ \
+ volatile u8 ref_count; \
+ \
+ /** index of buffer pool this buffer belongs. */ \
+ u8 buffer_pool_index; \
+ \
+ /** Error code for buffers to be enqueued to error handler. */ \
+ vlib_error_t error; \
+ \
+ /** Next buffer for this linked-list of buffers. Only valid if \
+ * VLIB_BUFFER_NEXT_PRESENT flag is set. */ \
+ u32 next_buffer; \
+ \
+ /** The following fields can be in a union because once a packet enters \
+ * the punt path, it is no longer on a feature arc */ \
+ union \
+ { \
+ /** Used by feature subgraph arcs to visit enabled feature nodes */ \
+ u32 current_config_index; \
+ /* the reason the packet once punted */ \
+ u32 punt_reason; \
+ }; \
+ \
+ /** Opaque data used by sub-graphs for their own purposes. */ \
+ u32 opaque[10];
+
+typedef struct
+{
+ CLIB_ALIGN_MARK (align_mark, 64);
+ vlib_buffer_template_fields
+} vlib_buffer_template_t;
+
+STATIC_ASSERT_SIZEOF (vlib_buffer_template_t, 64);
+
/** VLIB buffer representation. */
typedef union
{
+ CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
struct
{
- CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
-
- /** signed offset in data[], pre_data[] that we are currently
- * processing. If negative current header points into predata area. */
- i16 current_data;
-
- /** Nbytes between current data and the end of this buffer. */
- u16 current_length;
-
- /** buffer flags:
- <br> VLIB_BUFFER_FREE_LIST_INDEX_MASK: bits used to store free list index,
- <br> VLIB_BUFFER_IS_TRACED: trace this buffer.
- <br> VLIB_BUFFER_NEXT_PRESENT: this is a multi-chunk buffer.
- <br> VLIB_BUFFER_TOTAL_LENGTH_VALID: as it says
- <br> VLIB_BUFFER_EXT_HDR_VALID: buffer contains valid external buffer manager header,
- set to avoid adding it to a flow report
- <br> VLIB_BUFFER_FLAG_USER(n): user-defined bit N
- */
- u32 flags;
-
- /** Generic flow identifier */
- u32 flow_id;
-
- /** Reference count for this buffer. */
- volatile u8 ref_count;
-
- /** index of buffer pool this buffer belongs. */
- u8 buffer_pool_index;
-
- /** Error code for buffers to be enqueued to error handler. */
- vlib_error_t error;
-
- /** Next buffer for this linked-list of buffers. Only valid if
- * VLIB_BUFFER_NEXT_PRESENT flag is set. */
- u32 next_buffer;
-
- /** The following fields can be in a union because once a packet enters
- * the punt path, it is no longer on a feature arc */
union
{
- /** Used by feature subgraph arcs to visit enabled feature nodes */
- u32 current_config_index;
- /* the reason the packet once punted */
- u32 punt_reason;
+ struct
+ {
+ vlib_buffer_template_fields
+ };
+ vlib_buffer_template_t template;
};
- /** Opaque data used by sub-graphs for their own purposes. */
- u32 opaque[10];
-
- /** part of buffer metadata which is initialized on alloc ends here. */
- STRUCT_MARK (template_end);
+ /* Data above is initialized or zeroed on alloc, data bellow is not
+ * and it is app responsibility to ensure data is valid */
/** start of 2nd half (2nd cacheline on systems where cacheline size is 64) */
CLIB_ALIGN_MARK (second_half, 64);
"VLIB_BUFFER_PRE_DATA_SIZE must be divisible by cache line size");
#define VLIB_BUFFER_HDR_SIZE (sizeof(vlib_buffer_t) - VLIB_BUFFER_PRE_DATA_SIZE)
+#define VLIB_BUFFER_INVALID_INDEX 0xffffffff
/** \brief Prefetch buffer metadata.
The first 64 bytes of buffer contains most header information
vlib_buffer_pool_thread_t *threads;
/* buffer metadata template */
- vlib_buffer_t buffer_template;
+ vlib_buffer_template_t buffer_template;
} vlib_buffer_pool_t;
#define VLIB_BUFFER_MAX_NUMA_NODES 32
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