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libbpf: Support attachment of BPF tracing programs to kernel modules

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Teach libbpf to search for BTF types in kernel modules for tracing BPF
programs. This allows attachment of raw_tp/fentry/fexit/fmod_ret/etc BPF
program types to tracepoints and functions in kernel modules.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20201203204634.1325171-13-andrii@kernel.org
This commit is contained in:
Andrii Nakryiko
2020-12-03 12:46:32 -08:00
committed by Andrii Nakryiko
parent a1fd6dab54
commit d95b12da56
3 changed files with 112 additions and 32 deletions
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src/libbpf_internal.h
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@@ -160,6 +160,7 @@ struct bpf_prog_load_params {
const char *license;
__u32 kern_version;
__u32 attach_prog_fd;
__u32 attach_btf_obj_fd;
__u32 attach_btf_id;
__u32 prog_ifindex;
__u32 prog_btf_fd;