xsk: Fix xsk_umem_xdp_frame_sz()
Calculating the "data_hard_end" for an XDP buffer coming from AF_XDP zero-copy mode, the return value of xsk_umem_xdp_frame_sz() is added to "data_hard_start". Currently, the chunk size of the UMEM is returned by xsk_umem_xdp_frame_sz(). This is not correct, if the fixed UMEM headroom is non-zero. Fix this by returning the chunk_size without the UMEM headroom. Fixes: 2a637c5b ("xdp: For Intel AF_XDP drivers add XDP frame_sz") Signed-off-by:Björn Töpel <bjorn.topel@intel.com> Signed-off-by:
Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200520192103.355233-2-bjorn.topel@gmail.com
parent
dda18a5c
Please register or sign in to comment