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libbpf: implement bpf_prog_query_opts

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Implement bpf_prog_query_opts as a more expendable version of
bpf_prog_query. Expose new prog_attach_flags and attach_btf_func_id as
well:

* prog_attach_flags is a per-program attach_type; relevant only for
  lsm cgroup program which might have different attach_flags
  per attach_btf_id
* attach_btf_func_id is a new field expose for prog_query which
  specifies real btf function id for lsm cgroup attachments

Acked-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Link: https://lore.kernel.org/r/20220628174314.1216643-10-sdf@google.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Stanislav Fomichev
2022-06-28 10:43:12 -07:00
committed by Andrii Nakryiko
parent f9f7f2d30a
commit 812a95fdf7
3 changed files with 47 additions and 7 deletions
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src/libbpf.map
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@@ -355,6 +355,7 @@ LIBBPF_0.8.0 {
LIBBPF_1.0.0 {
global:
bpf_prog_query_opts;
btf__add_enum64;
btf__add_enum64_value;
libbpf_bpf_attach_type_str;