On 07/26/2018 07:40 AM, Toshiaki Makita wrote:

From: Toshiaki Makita <redacted>

This is preparation for XDP TX and ndo_xdp_xmit.
This allows napi handler to handle xdp_frames through xdp ring as well
as sk_buff.

v3:
- Revert v2 change around rings and use a flag to differentiate skb and
  xdp_frame, since bulk skb xmit makes little performance difference
  for now.

v2:
- Use another ring instead of using flag to differentiate skb and
  xdp_frame. This approach makes bulk skb transmit possible in
  veth_xmit later.
- Clear xdp_frame feilds in skb->head.
- Implement adjust_tail.

Signed-off-by: Toshiaki Makita <redacted>
---
 drivers/net/veth.c | 87 ++++++++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 82 insertions(+), 5 deletions(-)

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