Implement mbuf metadata macros to facilitate refering to space in mbuf headroom;
Signed-off-by: Ouyang Changchun <changchun.ouyang at intel.com>
---
lib/librte_mbuf/rte_mbuf.h | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h
index edffc2c..baf3ca4 100644
--- a/lib/librte_mbuf/rte_mbuf.h
+++ b/lib/librte_mbuf/rte_mbuf.h
@@ -201,8 +201,25 @@ struct rte_mbuf {
struct rte_ctrlmbuf ctrl;
struct rte_pktmbuf pkt;
};
+
+ union {
+ uint8_t metadata[0];
+ uint16_t metadata16[0];
+ uint32_t metadata32[0];
+ uint64_t metadata64[0];
+ };
} __rte_cache_aligned;
+#define RTE_MBUF_METADATA_UINT8(mbuf, offset) (mbuf->metadata[offset])
+#define RTE_MBUF_METADATA_UINT16(mbuf, offset)
(mbuf->metadata16[offset/sizeof(uint16_t)])
+#define RTE_MBUF_METADATA_UINT32(mbuf, offset)
(mbuf->metadata32[offset/sizeof(uint32_t)])
+#define RTE_MBUF_METADATA_UINT64(mbuf, offset)
(mbuf->metadata64[offset/sizeof(uint64_t)])
+
+#define RTE_MBUF_METADATA_UINT8_PTR(mbuf, offset) (&mbuf->metadata[offset])
+#define RTE_MBUF_METADATA_UINT16_PTR(mbuf, offset)
(&mbuf->metadata16[offset/sizeof(uint16_t)])
+#define RTE_MBUF_METADATA_UINT32_PTR(mbuf, offset)
(&mbuf->metadata32[offset/sizeof(uint32_t)])
+#define RTE_MBUF_METADATA_UINT64_PTR(mbuf, offset)
(&mbuf->metadata64[offset/sizeof(uint64_t)])
+
/**
* Given the buf_addr returns the pointer to corresponding mbuf.
*/
--
1.9.0
