libbpf: Factor out common logic of testing and closing FD

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Factor out common piece of logic that detects support for a feature based on
successfully created FD. Also take care of closing FD, if it was created.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200818213356.2629020-4-andriin@fb.com

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Andrii Nakryiko 2020-08-18 14:33:52 -07:00 • committed by Alexei Starovoitov

parent 47b6cb4d0a

commit bb180fb240

1 changed files with 17 additions and 53 deletions

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tools/lib/bpf/libbpf.c

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