X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=lib%2Flibrte_port%2Frte_port.h;h=d84e5a12850ce30fabf8955148abc18d951adb93;hb=e033c005c225e2fdcdb5de3846cbcd2ecc5df5bf;hp=1d763c2ece8edc9f4eeb0a685475663feb899800;hpb=a9cf8ad6514689903c497af8e082c62913885c1f;p=dpdk.git

diff --git a/lib/librte_port/rte_port.h b/lib/librte_port/rte_port.h
index 1d763c2ece..d84e5a1285 100644
--- a/lib/librte_port/rte_port.h
+++ b/lib/librte_port/rte_port.h
@@ -50,6 +50,29 @@ extern "C" {
 #include <stdint.h>
 #include <rte_mbuf.h>
 
+/**@{
+ * Macros to allow accessing metadata stored in the mbuf headroom
+ * just beyond the end of the mbuf data structure returned by a port
+ */
+#define RTE_MBUF_METADATA_UINT8(mbuf, offset)              \
+	(((uint8_t *)&(mbuf)[1])[offset])
+#define RTE_MBUF_METADATA_UINT16(mbuf, offset)             \
+	(((uint16_t *)&(mbuf)[1])[offset/sizeof(uint16_t)])
+#define RTE_MBUF_METADATA_UINT32(mbuf, offset)             \
+	(((uint32_t *)&(mbuf)[1])[offset/sizeof(uint32_t)])
+#define RTE_MBUF_METADATA_UINT64(mbuf, offset)             \
+	(((uint64_t *)&(mbuf)[1])[offset/sizeof(uint64_t)])
+
+#define RTE_MBUF_METADATA_UINT8_PTR(mbuf, offset)          \
+	(&RTE_MBUF_METADATA_UINT8(mbuf, offset))
+#define RTE_MBUF_METADATA_UINT16_PTR(mbuf, offset)         \
+	(&RTE_MBUF_METADATA_UINT16(mbuf, offset))
+#define RTE_MBUF_METADATA_UINT32_PTR(mbuf, offset)         \
+	(&RTE_MBUF_METADATA_UINT32(mbuf, offset))
+#define RTE_MBUF_METADATA_UINT64_PTR(mbuf, offset)         \
+	(&RTE_MBUF_METADATA_UINT64(mbuf, offset))
+/**@}*/
+
 /*
  * Port IN
  *