From mboxrd@z Thu Jan 1 00:00:00 1970 From: Zhiyong Yang Subject: [PATCH v2] net/virtio: fix wrong TX pkt length stats Date: Mon, 23 Oct 2017 14:40:36 +0800 Message-ID: <20171023064036.56821-1-zhiyong.yang@intel.com> References: <20171011043935.16813-1-zhiyong.yang@intel.com> Cc: stable@dpdk.org, yliu@fridaylinux.org, maxime.coquelin@redhat.com, Zhiyong Yang To: dev@dpdk.org Return-path: In-Reply-To: <20171011043935.16813-1-zhiyong.yang@intel.com> List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" 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: stable@dpdk.org Cc: yliu@fridaylinux.org Cc: maxime.coquelin@redhat.com Signed-off-by: Zhiyong Yang Reviewed-by: Maxime Coquelin --- 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