Re: [PATCH v4 bpf-next 1/3] net: veth: account total xdp_frame len running ndo_xdp_xmit

Lorenzo Bianconi [off-list ref] writes:

Even if this is a theoretical issue since it is not possible to perform
XDP_REDIRECT on a non-linear xdp_frame, veth driver does not account
paged area in ndo_xdp_xmit function pointer.
Introduce xdp_get_frame_len utility routine to get the xdp_frame full
length and account total frame size running XDP_REDIRECT of a
non-linear xdp frame into a veth device.

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>

Acked-by: Toke Høiland-Jørgensen <redacted>