[PATCH] fix ceph async messenger runtime bug based on spdk/dpdk

[chunmei Liu <chunmei.liu@intel.com>]

From: chunmei <chunmei.liu@intel.com>

ceph async messenger has some run time error with this dpdk library,
1) need init mb->next= null when allocate a buffer other wise
rte_mbuf_sanity_check will report error.
2) when check the size, can't calculate mbuf_data_room_size
because async messenger dpdk will allocate this part later
not at create mempool.

Signed-off-by: chunmei Liu <chunmei.liu@intel.com>
---
 drivers/net/ixgbe/ixgbe_rxtx.c | 1 +
 lib/librte_mbuf/rte_mbuf.c     | 3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ixgbe/ixgbe_rxtx.c b/drivers/net/ixgbe/ixgbe_rxtx.c
index 1e07895..30fdbc1 100644
--- a/drivers/net/ixgbe/ixgbe_rxtx.c
+++ b/drivers/net/ixgbe/ixgbe_rxtx.c
@@ -1589,6 +1589,7 @@ ixgbe_rx_alloc_bufs(struct ixgbe_rx_queue *rxq, bool reset_mbuf)
 		}
 
 		rte_mbuf_refcnt_set(mb, 1);
+		mb->next = NULL;
 		mb->data_off = RTE_PKTMBUF_HEADROOM;
 
 		/* populate the descriptors */
diff --git a/lib/librte_mbuf/rte_mbuf.c b/lib/librte_mbuf/rte_mbuf.c
index 0e3e36a..c01da19 100644
--- a/lib/librte_mbuf/rte_mbuf.c
+++ b/lib/librte_mbuf/rte_mbuf.c
@@ -102,7 +102,6 @@ rte_pktmbuf_pool_init(struct rte_mempool *mp, void *opaque_arg)
 	}
 
 	RTE_ASSERT(mp->elt_size >= sizeof(struct rte_mbuf) +
-		user_mbp_priv->mbuf_data_room_size +
 		user_mbp_priv->mbuf_priv_size);
 
 	mbp_priv = rte_mempool_get_priv(mp);
@@ -233,6 +232,8 @@ rte_mbuf_sanity_check(const struct rte_mbuf *m, int is_header)
 	}
 	if (nb_segs != 0)
 		rte_panic("bad nb_segs\n");
+	if (m_seg != NULL)
+		rte_panic("bad m_seg\n");
 }
 
 /* dump a mbuf on console */
-- 
2.7.4