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libbpf: Making bpf_prog_load() ignore name if kernel doesn't support

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Similar with commit 10b62d6a38f7 ("libbpf: Add names for auxiliary maps"),
let's make bpf_prog_load() also ignore name if kernel doesn't support
program name.

To achieve this, we need to call sys_bpf_prog_load() directly in
probe_kern_prog_name() to avoid circular dependency. sys_bpf_prog_load()
also need to be exported in the libbpf_internal.h file.

Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Quentin Monnet <quentin@isovalent.com>
Link: https://lore.kernel.org/bpf/20220813000936.6464-1-liuhangbin@gmail.com
This commit is contained in:
Hangbin Liu
2022-08-13 08:09:36 +08:00
committed by Andrii Nakryiko
parent 8be13ee80b
commit 079bc8536d
3 changed files with 16 additions and 6 deletions
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3
src/libbpf_internal.h
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@@ -573,4 +573,7 @@ static inline bool is_pow_of_2(size_t x)
return x && (x & (x - 1)) == 0;
}
#define PROG_LOAD_ATTEMPTS 5
int sys_bpf_prog_load(union bpf_attr *attr, unsigned int size, int attempts);
#endif /* __LIBBPF_LIBBPF_INTERNAL_H */