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SubjectRe: [PATCH net 5/9] virtio-net: unbreak csumed packets for XDP_PASS
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On 16-12-23 06:37 AM, Jason Wang wrote:
> We drop csumed packet when do XDP for packets. This breaks
> XDP_PASS when GUEST_CSUM is supported. Fix this by allowing csum flag
> to be set. With this patch, simple TCP works for XDP_PASS.
>
> Cc: John Fastabend <john.r.fastabend@intel.com>
> Signed-off-by: Jason Wang <jasowang@redhat.com>
> ---
> drivers/net/virtio_net.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
> index 470293e..0778dc8 100644
> --- a/drivers/net/virtio_net.c
> +++ b/drivers/net/virtio_net.c
> @@ -440,7 +440,7 @@ static struct sk_buff *receive_big(struct net_device *dev,
> struct virtio_net_hdr_mrg_rxbuf *hdr = buf;
> u32 act;
>
> - if (unlikely(hdr->hdr.gso_type || hdr->hdr.flags))
> + if (unlikely(hdr->hdr.gso_type))
> goto err_xdp;
> act = do_xdp_prog(vi, rq, xdp_prog, page, 0, len);
> switch (act) {
> @@ -572,7 +572,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
> * the receive path after XDP is loaded. In practice I
> * was not able to create this condition.
> */
> - if (unlikely(hdr->hdr.gso_type || hdr->hdr.flags))
> + if (unlikely(hdr->hdr.gso_type))
> goto err_xdp;
>
> act = do_xdp_prog(vi, rq, xdp_prog, xdp_page, offset, len);
>

Acked-by: John Fastabend <john.r.fastabend@intel.com>

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