netdev - Re: [PATCH v3 bpf-next 0/3] introduce xdp frags support to veth driver

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Date:   Tue, 8 Mar 2022 16:54:32 +0100
From:   Lorenzo Bianconi <lorenzo.bianconi@...hat.com>
To:     Lorenzo Bianconi <lorenzo@...nel.org>
Cc:     bpf@...r.kernel.org, netdev@...r.kernel.org, davem@...emloft.net,
        kuba@...nel.org, ast@...nel.org, daniel@...earbox.net,
        brouer@...hat.com, toke@...hat.com, pabeni@...hat.com,
        echaudro@...hat.com, toshiaki.makita1@...il.com, andrii@...nel.org
Subject: Re: [PATCH v3 bpf-next 0/3] introduce xdp frags support to veth
 driver

> Introduce xdp frags support to veth driver in order to allow increasing the mtu
> over the page boundary if the attached xdp program declares to support xdp
> fragments. Enable NETIF_F_ALL_TSO when the device is running in xdp mode.
> This series has been tested running xdp_router_ipv4 sample available in the
> kernel tree redirecting tcp traffic from veth pair into the mvneta driver.

Hi Alexei and Daniel,

please drop this revision, I will post a new version soon adding a check on max
supported mtu when the loaded program support xdp frags.

Regards,
Lorenzo

> 
> Changes since v2:
> - move rcu_access_pointer() check in veth_skb_is_eligible_for_gro
> 
> Changes since v1:
> - always consider skb paged are non-writable
> - fix tpt issue with sctp
> - always use napi if we are running in xdp mode in veth_xmit
> 
> Lorenzo Bianconi (3):
>   net: veth: account total xdp_frame len running ndo_xdp_xmit
>   veth: rework veth_xdp_rcv_skb in order to accept non-linear skb
>   veth: allow jumbo frames in xdp mode
> 
>  drivers/net/veth.c | 212 +++++++++++++++++++++++++++++----------------
>  include/net/xdp.h  |  14 +++
>  net/core/xdp.c     |   1 +
>  3 files changed, 151 insertions(+), 76 deletions(-)
> 
> -- 
> 2.35.1
> 

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