linux-kernel - [PATCH net-next 0/2] udp: allow forwarding of plain (non-fraglisted) UDP GRO packets

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Date:   Mon, 18 Jan 2021 19:31:55 +0000
From:   Alexander Lobakin <alobakin@...me>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        Willem de Bruijn <willemb@...gle.com>,
        Steffen Klassert <steffen.klassert@...unet.com>,
        Alexander Duyck <alexander.duyck@...il.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Alexander Lobakin <alobakin@...me>,
        Igor Russkikh <irusskikh@...vell.com>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        Miaohe Lin <linmiaohe@...wei.com>,
        Antoine Tenart <atenart@...nel.org>,
        Michal Kubecek <mkubecek@...e.cz>,
        Andrew Lunn <andrew@...n.ch>,
        Meir Lichtinger <meirl@...lanox.com>,
        Aya Levin <ayal@...lanox.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH net-next 0/2] udp: allow forwarding of plain (non-fraglisted) UDP GRO packets

This series allows to form UDP GRO packets in cases without sockets,
primarily for forwarding. To not change the current datapath, this
is performed only when the new netdev feature is enabled via Ethtool.
Prior to this point, only fraglisted UDP GRO was available.

Since v2 [1]:
 - convert to a series;
 - new: add new netdev_feature to explicitly enable/disable UDP GRO
   when there is no socket, defaults to off (Paolo Abeni).

Since v1 [0]:
 - drop redundant 'if (sk)' check (Alexander Duyck);
 - add a ref in the commit message to one more commit that was
   an important step for UDP GRO forwarding.

[0] https://lore.kernel.org/netdev/20210112211536.261172-1-alobakin@pm.me
[1] https://lore.kernel.org/netdev/20210113103232.4761-1-alobakin@pm.me

Alexander Lobakin (2):
  net: introduce UDP GRO netdev feature
  udp: allow forwarding of plain (non-fraglisted) UDP GRO packets

 include/linux/netdev_features.h |  4 +++-
 net/ethtool/common.c            |  1 +
 net/ipv4/udp_offload.c          | 16 +++++++++++-----
 3 files changed, 15 insertions(+), 6 deletions(-)

-- 
2.30.0