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libbpf: add ability to attach/detach BPF program to perf event

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bpf_program__attach_perf_event allows to attach BPF program to existing
perf event hook, providing most generic and most low-level way to attach BPF
programs. It returns struct bpf_link, which should be passed to
bpf_link__destroy to detach and free resources, associated with a link.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Reviewed-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Andrii Nakryiko 2019-07-01 16:58:57 -07:00 • committed by Daniel Borkmann
parent 1c2e9efc26
commit 63f2f5ee85
3 changed files with 67 additions and 0 deletions
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3
tools/lib/bpf/libbpf.h
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@ -169,6 +169,9 @@ struct bpf_link;
LIBBPF_API int bpf_link__destroy(struct bpf_link *link);
LIBBPF_API struct bpf_link *
bpf_program__attach_perf_event(struct bpf_program *prog, int pfd);
struct bpf_insn;
/*