mbuf: add named points inside the structure

[dpdk.git] / lib / librte_mbuf / rte_mbuf.h

diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h
index 2f1bd4a..34900d4 100644 (file)
--- a/lib/librte_mbuf/rte_mbuf.h
+++ b/lib/librte_mbuf/rte_mbuf.h
@@ -115,14 +115,22 @@ extern "C" {
  */
 #define PKT_TX_OFFLOAD_MASK (PKT_TX_VLAN_PKT | PKT_TX_IP_CKSUM | PKT_TX_L4_MASK)
 
+/* define a set of marker types that can be used to refer to set points in the
+ * mbuf */
+typedef void    *MARKER[0];   /**< generic marker for a point in a structure */
+typedef uint64_t MARKER64[0]; /**< marker that allows us to overwrite 8 bytes
+                               * with a single assignment */
 /**
  * The generic rte_mbuf, containing a packet mbuf.
  */
 struct rte_mbuf {
+       MARKER cacheline0;
+
        void *buf_addr;           /**< Virtual address of segment buffer. */
        phys_addr_t buf_physaddr; /**< Physical address of segment buffer. */
 
        /* next 8 bytes are initialised on RX descriptor rearm */
+       MARKER64 rearm_data;
        uint16_t buf_len;         /**< Length of segment buffer. */
        uint16_t data_off;
 
@@ -147,6 +155,7 @@ struct rte_mbuf {
        uint64_t ol_flags;        /**< Offload features. */
 
        /* remaining bytes are set on RX when pulling packet from descriptor */
+       MARKER rx_descriptor_fields1;
        uint16_t reserved2;       /**< Unused field. Required for padding */
        uint16_t data_len;        /**< Amount of data in segment buffer. */
        uint32_t pkt_len;         /**< Total pkt len: sum of all segments. */