Introduce bpf_xdp_get_buff_len helper in order to return the xdp buffer
total size (linear and paged area)
Acked-by: NToke Hoiland-Jorgensen <toke@redhat.com>
Acked-by: NJohn Fastabend <john.fastabend@gmail.com>
Signed-off-by: NLorenzo Bianconi <lorenzo@kernel.org>
Link: https://lore.kernel.org/r/aac9ac3504c84026cf66a3c71b7c5ae89bc991be.1642758637.git.lorenzo@kernel.orgSigned-off-by: NAlexei Starovoitov <ast@kernel.org>