In the function virtqueue_enqueue_xmit(), when can_push is true,
vtnet_hdr_size is added to pkt_len by calling rte_pktmbuf_prepend.
So, virtio header length should be subtracted before calling stats
function.
Fixes: 58169a9c8153 ("net/virtio: support Tx checksum offload")
Cc: sta...@dpdk.org
Cc: y...@fridaylinux.org
Cc: maxime.coque...@redhat.com
Signed-off-by: Zhiyong Yang <zhiyong.y...@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coque...@redhat.com>
---
Changes in V2:
Put code in the function virtqueue_enqueue_xmit() according to
yuanhan's comments.
drivers/net/virtio/virtio_rxtx.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/net/virtio/virtio_rxtx.c b/drivers/net/virtio/virtio_rxtx.c
index 2cf82fef4..f28751e07 100644
--- a/drivers/net/virtio/virtio_rxtx.c
+++ b/drivers/net/virtio/virtio_rxtx.c
@@ -396,6 +396,13 @@ virtqueue_enqueue_xmit(struct virtnet_tx *txvq, struct
rte_mbuf *cookie,
vq->vq_desc_tail_idx = idx;
vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt - needed);
vq_update_avail_ring(vq, head_idx);
+
+ /* when can_push is true, vtnet_hdr_size is added to pkt_len
+ * of mbuf. It should be subtracted in order to make stats function
+ * work in the right way.
+ */
+ if (can_push)
+ cookie->pkt_len -= head_size;
}
void
--
2.13.3
