John Fastabend 814abfabef
xdp: add bpf_redirect helper function ...
This adds support for a bpf_redirect helper function to the XDP
infrastructure. For now this only supports redirecting to the egress
path of a port.
In order to support drivers handling a xdp_buff natively this patches
uses a new ndo operation ndo_xdp_xmit() that takes pushes a xdp_buff
to the specified device.
If the program specifies either (a) an unknown device or (b) a device
that does not support the operation a BPF warning is thrown and the
XDP_ABORTED error code is returned.
Signed-off-by: John Fastabend <john.fastabend@gmail.com >
Acked-by: Daniel Borkmann <daniel@iogearbox.net >
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com >
Signed-off-by: David S. Miller <davem@davemloft.net >
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