#define VLIB_BUFFER_FLAG_USER(n) (1 << LOG2_VLIB_BUFFER_FLAG_USER(n))
#define VLIB_BUFFER_FLAGS_ALL (0x0f)
-/* VLIB buffer representation. */
-typedef struct
+/** VLIB buffer representation. */
+typedef union
{
- CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
- /* Offset within data[] that we are currently processing.
- If negative current header points into predata area. */
- i16 current_data; /**< signed offset in data[], pre_data[]
- that we are currently processing.
- If negative current header points into predata area.
- */
- u16 current_length; /**< Nbytes between current data and
- the end of this buffer.
- */
- u32 flags; /**< 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 flow_id; /**< Generic flow identifier */
-
-
- u32 next_buffer; /**< Next buffer for this linked-list of buffers.
- Only valid if VLIB_BUFFER_NEXT_PRESENT flag is set.
- */
-
- u32 current_config_index; /**< Used by feature subgraph arcs to
- visit enabled feature nodes
- */
- vlib_error_t error; /**< Error code for buffers to be enqueued
- to error handler.
- */
- u8 n_add_refs; /**< Number of additional references to this buffer. */
-
- u8 buffer_pool_index; /**< index of buffer pool this buffer belongs. */
-
- u32 opaque[10]; /**< Opaque data used by sub-graphs for their own purposes.
- See .../vnet/vnet/buffer.h
- */
-
- STRUCT_MARK (template_end); /**< part of buffer metadata which is
- initialized on alloc ends here. It may be
- different than cacheline on systems with
- buffer cacheline size */
-
- /***** end of first cache line */
- CLIB_CACHE_LINE_ALIGN_MARK (cacheline1);
-
- u32 trace_index; /**< Specifies index into trace buffer
- if VLIB_PACKET_IS_TRACED flag is set.
- */
- u32 recycle_count; /**< Used by L2 path recycle code */
-
- u32 total_length_not_including_first_buffer;
- /**< Only valid for first buffer in chain. Current length plus
- total length given here give total number of bytes in buffer chain.
- */
- u8 align_pad[4]; /**< available */
- u32 opaque2[12]; /**< More opaque data, see ../vnet/vnet/buffer.h */
-
- /***** end of second cache line */
- CLIB_CACHE_LINE_ALIGN_MARK (cacheline2);
- u8 pre_data[VLIB_BUFFER_PRE_DATA_SIZE]; /**< Space for inserting data
- before buffer start.
- Packet rewrite string will be
- rewritten backwards and may extend
- back before buffer->data[0].
- Must come directly before packet data.
- */
-
- u8 data[0]; /**< Packet data. Hardware DMA here */
-} vlib_buffer_t; /* Must be a multiple of 64B. */
+ 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;
+
+ /** Number of additional references to this buffer. */
+ u8 n_add_refs;
+
+ /** 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;
+
+ /** Used by feature subgraph arcs to visit enabled feature nodes */
+ u32 current_config_index;
+
+ /** 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);
+
+ /** start of 2nd cache line */
+ CLIB_CACHE_LINE_ALIGN_MARK (cacheline1);
+
+ /** Specifies index into trace buffer if VLIB_PACKET_IS_TRACED flag is
+ * set. */
+ u32 trace_index;
+
+ /** Only valid for first buffer in chain. Current length plus total length
+ * given here give total number of bytes in buffer chain. */
+ u32 total_length_not_including_first_buffer;
+
+ /**< More opaque data, see ../vnet/vnet/buffer.h */
+ u32 opaque2[14];
+
+ /** start of third cache line */
+ CLIB_CACHE_LINE_ALIGN_MARK (cacheline2);
+
+ /** Space for inserting data before buffer start. Packet rewrite string
+ * will be rewritten backwards and may extend back before
+ * buffer->data[0]. Must come directly before packet data. */
+ u8 pre_data[VLIB_BUFFER_PRE_DATA_SIZE];
+
+ /** Packet data */
+ u8 data[0];
+ };
+#ifdef CLIB_HAVE_VEC128
+ u8x16 as_u8x16[4];
+#endif
+#ifdef CLIB_HAVE_VEC256
+ u8x16 as_u8x32[2];
+#endif
+#ifdef CLIB_HAVE_VEC512
+ u8x16 as_u8x64[1];
+#endif
+} vlib_buffer_t;
#define VLIB_BUFFER_HDR_SIZE (sizeof(vlib_buffer_t) - VLIB_BUFFER_PRE_DATA_SIZE)
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