mbuf: switch vlan_tci and reserved2 fields

Move the vlan_tci field up by two bytes in the mbuf data structure. This
has two effects:
* Ensures the the ixgbe vector driver places the vlan tag in the correct
  place in the mbuf.
* Allows a second vlan tag field, if one is added in the future, to be
  placed after the existing vlan field, rather than before.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Acked-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>

diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h
index 9e70d3b..68304cc 100644 (file)
--- a/lib/librte_mbuf/rte_mbuf.h
+++ b/lib/librte_mbuf/rte_mbuf.h
@@ -159,8 +159,8 @@ struct rte_mbuf {
        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. */
-       uint16_t reserved;
        uint16_t vlan_tci;        /**< VLAN Tag Control Identifier (CPU order) */
+       uint16_t reserved;
        union {
                uint32_t rss;     /**< RSS hash result if RSS enabled */
                struct {