net: xdp: introduce bpf_xdp_pointer utility routine
Similar to skb_header_pointer, introduce bpf_xdp_pointer utility routine to return a pointer to a given position in the xdp_buff if the requested area (offset + len) is contained in a contiguous memory area otherwise it will be copied in a bounce buffer provided by the caller. Similar to the tc counterpart, introduce the two following xdp helpers: - bpf_xdp_load_bytes - bpf_xdp_store_bytes Reviewed-by:Eelco Chaudron <echaudro@redhat.com> Acked-by:
Toke Hoiland-Jorgensen <toke@redhat.com> Acked-by:
John Fastabend <john.fastabend@gmail.com> Acked-by:
Jakub Kicinski <kuba@kernel.org> Signed-off-by:
Lorenzo Bianconi <lorenzo@kernel.org> Link: https://lore.kernel.org/r/ab285c1efdd5b7a9d361348b1e7d3ef49f6382b3.1642758637.git.lorenzo@kernel.org Signed-off-by:
Alexei Starovoitov <ast@kernel.org>
parent
f45d5b6c
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