On Wed, Oct 11, 2017 at 12:39:35PM +0800, Zhiyong Yang wrote:
> In the function virtqueue_enqueue_xmit(), when can_push == 1 is true,
> vtnet_hdr_size is added to pkt_len by calling rte_pktmbuf_prepend.
> So, virtio header len should be subtracted before calling stats
> function.
Nice catch!
> Fixes: 58169a9c8153 ("net/virtio: support Tx checksum offload")
It should also Cc stable.
> Signed-off-by: Zhiyong Yang <zhiyong.y...@intel.com>
> ---
> drivers/net/virtio/virtio_rxtx.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/drivers/net/virtio/virtio_rxtx.c
> b/drivers/net/virtio/virtio_rxtx.c
> index 609b4138a..bf14f9a99 100644
> --- a/drivers/net/virtio/virtio_rxtx.c
> +++ b/drivers/net/virtio/virtio_rxtx.c
> @@ -1079,6 +1079,12 @@ virtio_xmit_pkts(void *tx_queue, struct rte_mbuf
> **tx_pkts, uint16_t nb_pkts)
> /* Enqueue Packet buffers */
> virtqueue_enqueue_xmit(txvq, txm, slots, use_indirect,
> can_push);
>
> + /* In function virtqueue_enqueue_xmit(), when can_push == 1
Hmm..., why not modifying it directly in virtqueue_enqueue_xmit()?
--yliu
> + * is true, vtnet_hdr_size is added to pkt_len of mbuf. So, it
> + * should be subtracted before calling stats function.
> + */
> + if (can_push == 1)
> + txm->pkt_len -= txvq->vq->hw->vtnet_hdr_size;
> txvq->stats.bytes += txm->pkt_len;
> virtio_update_packet_stats(&txvq->stats, txm);
> }
> --
> 2.13.3
