bpf: fix availability probing for seg6 helpers
bpf_lwt_seg6_* helpers require CONFIG_IPV6_SEG6_BPF, and currently return -EOPNOTSUPP to indicate unavailability. This patch forces the BPF verifier to reject programs using these helpers when !CONFIG_IPV6_SEG6_BPF, allowing users to more easily probe if they are available or not. Signed-off-by: NMathieu Xhonneux <m.xhonneux@gmail.com> Signed-off-by: NDaniel Borkmann <daniel@iogearbox.net>
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