[dpdk-dev] Loop back mode of the KNI
Thomas Monjalon
thomas.monjalon at 6wind.com
Fri Jan 17 12:19:41 CET 2014
> > 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
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