bpf: allow option for setting bpf_l4_csum_replace from scratch
When programs need to calculate the csum from scratch for small UDP packets and use bpf_l4_csum_replace() to feed the result from helpers like bpf_csum_diff(), then we need a flag besides BPF_F_MARK_MANGLED_0 that would ignore the case of current csum being 0, and which would still allow for the helper to set the csum and transform when needed to CSUM_MANGLED_0. Signed-off-by:Daniel Borkmann <daniel@iogearbox.net> Acked-by:
Alexei Starovoitov <ast@kernel.org> Signed-off-by:
David S. Miller <davem@davemloft.net>
parent
2492d3b8
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