From: Daniel Borkmann
Date: Mon, 28 Nov 2016 23:16:54 +0100
> Add an IFLA_XDP_FLAGS attribute that can be passed for setting up
> XDP along with IFLA_XDP_FD, which eventually allows user space to
> implement typical add/replace/delete logic for programs. Right now,
> calling into dev_change_xdp_f
Add an IFLA_XDP_FLAGS attribute that can be passed for setting up
XDP along with IFLA_XDP_FD, which eventually allows user space to
implement typical add/replace/delete logic for programs. Right now,
calling into dev_change_xdp_fd() will always replace previous programs.
When passed XDP_FLAGS_UPDA
