• Björn Töpel's avatar
    xsk: add Rx receive functions and poll support · c497176c
    Björn Töpel authored
    Here the actual receive functions of AF_XDP are implemented, that in a
    later commit, will be called from the XDP layers.
    
    There's one set of functions for the XDP_DRV side and another for
    XDP_SKB (generic).
    
    A new XDP API, xdp_return_buff, is also introduced.
    
    Adding xdp_return_buff, which is analogous to xdp_return_frame, but
    acts upon an struct xdp_buff. The API will be used by AF_XDP in future
    commits.
    
    Support for the poll syscall is also implemented.
    
    v2: xskq_validate_id did not update cons_tail.
        The entries variable was calculated twice in xskq_nb_avail.
        Squashed xdp_return_buff commit.
    Signed-off-by: default avatarBjörn Töpel <bjorn.topel@intel.com>
    Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
    c497176c
xdp.c 7.57 KB