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bpftool: Handle libbpf_probe_prog_type errors

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Previously [1], we were using bpf_probe_prog_type which returned a
bool, but the new libbpf_probe_bpf_prog_type can return a negative
error code on failure. This change decides for bpftool to declare
a program type is not available on probe failure.

[1] https://lore.kernel.org/bpf/20220202225916.3313522-3-andrii@kernel.org/

Signed-off-by: Milan Landaverde <milan@mdaverde.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Quentin Monnet <quentin@isovalent.com>
Link: https://lore.kernel.org/bpf/20220331154555.422506-4-milan@mdaverde.com
This commit is contained in:
Milan Landaverde 2022-03-31 11:45:55 -04:00 • committed by Andrii Nakryiko
parent fff3dfab17
commit 7b53eaa656
1 changed files with 1 additions and 1 deletions
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2
tools/bpf/bpftool/feature.c
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@ -567,7 +567,7 @@ probe_prog_type(enum bpf_prog_type prog_type, bool *supported_types,
res = probe_prog_type_ifindex(prog_type, ifindex);
} else {
res = libbpf_probe_bpf_prog_type(prog_type, NULL);
res = libbpf_probe_bpf_prog_type(prog_type, NULL) > 0;
}
#ifdef USE_LIBCAP