virtio-net: build xdp_buff with multi buffers

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Support xdp for multi buffer packets in mergeable mode.

Putting the first buffer as the linear part for xdp_buff,
and the rest of the buffers as non-linear fragments to struct
skb_shared_info in the tailroom belonging to xdp_buff.

Let 'truesize' return to its literal meaning, that is, when
xdp is set, it includes the length of headroom and tailroom.

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>

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Heng Qi 2023-01-14 16:22:24 +08:00 • committed by David S. Miller

parent 50bd14bc98

commit ef75cb51f1

1 changed files with 100 additions and 8 deletions

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drivers/net/virtio_net.c

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