[dpdk-dev] Loop back mode of the KNI

[Thomas Monjalon]

> > From: Daniel Kaminsky
[...]
> > > But when running with *lo_mode=lo_mode_fifo_skb *the packets on the
> > > egress doesn't include the first 14 bytes (the ethernet header) although
> > > the packets size doesn't change.

> On Wed, Dec 25, 2013 at 2:50 AM, Zhang, Helin <helin.zhang at intel.com> wrote:
[...]
> > Yes. That's a bug, and it will be fixed in later DPDK releases.

25/12/2013 07:57, Daniel Kaminsky:
[...]
> The "fix" below works for me but I don't think it's complete and correct
> for all kernels.
> 
> --- src/kernel/fast_kni/kni_net.c
> +++ src/kernel/fast_kni/kni_net.c
> @@ -353,6 +353,12 @@
>   kni->stats.rx_bytes += len;
>   kni->stats.rx_packets++;
> 
> +                        /* adjust the skb */
> +                        if (likely(skb_mac_header_was_set(skb))) {
> +                            skb->len += ETH_HLEN;
> +                            skb->data -= ETH_HLEN;
> +                        }
> +
>   /* call tx interface */
>   kni_net_tx(skb, dev);
>   }

Thanks Daniel.
Please Helin, could you share the complete patch in case Daniel's one is not 
sufficient ?

-- 
Thomas