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virtio-net: set up xdp for multi buffer packets

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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: Heng Qi <hengqi@linux.alibaba.com>
Reviewed-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Heng Qi 2023-01-14 16:22:22 +08:00 committed by David S. Miller
parent e814b958ad
commit 8d9bc36de5
1 changed files with 3 additions and 3 deletions
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6
drivers/net/virtio_net.c
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@ -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;
}