> -----Original Message-----
> From: Ouyang, Changchun
> Sent: Wednesday, November 05, 2014 12:11 AM
> To: dev at dpdk.org
> Cc: Xie, Huawei; Ananyev, Konstantin; Cao, Waterman; Ouyang, Changchun
> Subject: [PATCH v4 1/3] vhost: Fix packet length issue
>
> As HW vlan strip will reduce the packet length by minus length of vlan tag,
> so it need restore the packet length by plus it.
>
> Signed-off-by: Changchun Ouyang <changchun.ouyang at intel.com>
> ---
> examples/vhost/main.c | 12 ++++++++++--
> 1 file changed, 10 insertions(+), 2 deletions(-)
>
> diff --git a/examples/vhost/main.c b/examples/vhost/main.c
> index 57ef464..5ca8dce 100644
> --- a/examples/vhost/main.c
> +++ b/examples/vhost/main.c
> @@ -1078,7 +1078,13 @@ virtio_tx_route(struct vhost_dev *vdev, struct
> rte_mbuf *m, uint16_t vlan_tag)
> rte_pktmbuf_free(m);
> return;
> }
> - offset = 4;
> +
> + /*
> + * HW vlan strip will reduce the packet length
> + * by minus length of vlan tag, so need restore
> + * the packet length by plus it.
> + */
> + offset = VLAN_HLEN;
> vlan_tag =
> (uint16_t)
> vlan_tags[(uint16_t)dev_ll->vdev->dev-
> >device_fh];
> @@ -1102,8 +1108,10 @@ virtio_tx_route(struct vhost_dev *vdev, struct
> rte_mbuf *m, uint16_t vlan_tag)
> len = tx_q->len;
>
> m->ol_flags = PKT_TX_VLAN_PKT;
> - /*FIXME: offset*/
> +
> m->data_len += offset;
> + m->pkt_len += offset;
> +
> m->vlan_tci = vlan_tag;
>
> tx_q->m_table[len] = m;
> --
> 1.8.4.2
Only one thing, I feel "by minus/plus" has grammar problem. :).
Acked-by: Huawei Xie <huawei.xie at intel.com>.
