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Message-ID: <Ylz7s/I8EUca82NL@Laptop-X1> Date: Mon, 18 Apr 2022 13:48:35 +0800 From: Hangbin Liu <liuhangbin@...il.com> To: netdev@...r.kernel.org Cc: "Michael S . Tsirkin" <mst@...hat.com>, Jason Wang <jasowang@...hat.com>, "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Maxim Mikityanskiy <maximmi@...lanox.com>, Willem de Bruijn <willemb@...gle.com>, virtualization@...ts.linux-foundation.org, Balazs Nemeth <bnemeth@...hat.com>, Mike Pattrick <mpattric@...hat.com>, Eric Dumazet <edumazet@...gle.com> Subject: Re: [PATCH net 0/2] net: fix kernel dropping GSO tagged packets Sorry, cc Mick for the correct address On Mon, Apr 18, 2022 at 12:43:37PM +0800, Hangbin Liu wrote: > Flavio reported that the kernel drops GSO VLAN tagged packet if it's > created with socket(AF_PACKET, SOCK_RAW, 0) plus virtio_net_hdr. > > The reason is AF_PACKET doesn't adjust the skb network header if there is > a VLAN tag. And in virtio_net_hdr_to_skb() it also checks skb->protocol > blindly and not take care of VLAN tags. > > The first patch adjust the network header position for AF_PACKET VLAN > tagged packets. The second patch fixes the VLAN protocol checking in > virtio_net_hdr_to_skb(). > > Hangbin Liu (2): > net/af_packet: adjust network header position for VLAN tagged packets > virtio_net: check L3 protocol for VLAN packets > > include/linux/virtio_net.h | 26 +++++++++++++++++++------- > net/packet/af_packet.c | 18 +++++++++++++----- > 2 files changed, 32 insertions(+), 12 deletions(-) > > -- > 2.35.1 >
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