Commit 8d9bc36d authored by Heng Qi's avatar Heng Qi Committed by David S. Miller
Browse files

virtio-net: set up xdp for multi buffer packets 



When the xdp program sets xdp.frags, which means it can process
multi-buffer packets over larger MTU, so we continue to support xdp.

Signed-off-by: default avatarHeng Qi <hengqi@linux.alibaba.com>
Reviewed-by: default avatarXuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: default avatarJason Wang <jasowang@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent e814b958

drivers/net/virtio_net.c

+3 −3
Original line number Diff line number Diff line
@@ -3106,9 +3106,9 @@ static int virtnet_xdp_set(struct net_device *dev, struct bpf_prog *prog, 
		return -EINVAL;

	}



	if (dev->mtu > max_sz) {

		NL_SET_ERR_MSG_MOD(extack, "MTU too large to enable XDP");

		netdev_warn(dev, "XDP requires MTU less than %u\n", max_sz);

	if (prog && !prog->aux->xdp_has_frags && dev->mtu > max_sz) {

		NL_SET_ERR_MSG_MOD(extack, "MTU too large to enable XDP without frags");

		netdev_warn(dev, "single-buffer XDP requires MTU less than %u\n", max_sz);

		return -EINVAL;

	}