mbuf: move metadata macros to rte_port library

[dpdk.git] / lib / librte_port / rte_port.h

diff --git a/lib/librte_port/rte_port.h b/lib/librte_port/rte_port.h
index 1d763c2..6bd5039 100644 (file)
--- a/lib/librte_port/rte_port.h
+++ b/lib/librte_port/rte_port.h
@@ -50,6 +50,28 @@ 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
  *