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libbpf: Export btf__find_by_name_kind_own()

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btf__find_by_name_kind() searches the base BTF before the split BTF,
so in case of a name collision between base and split it always
returns a base type. Tools that process split BTF may need to restrict
a lookup to the split's own types.

The internal helper btf__find_by_name_kind_own() already does exactly
that. Make it a public API.

Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/bpf/20260722233518.778854-5-ihor.solodrai@linux.dev
This commit is contained in:
Ihor Solodrai
2026-07-22 16:35:14 -07:00
committed by Andrii Nakryiko
parent e4293c31a3
commit ef242559eb
3 changed files with 3 additions and 2 deletions
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2
tools/lib/bpf/btf.h
View File

@@ -172,6 +172,8 @@ LIBBPF_API __s32 btf__find_by_name(const struct btf *btf,
const char *type_name);
LIBBPF_API __s32 btf__find_by_name_kind(const struct btf *btf,
const char *type_name, __u32 kind);
LIBBPF_API __s32 btf__find_by_name_kind_own(const struct btf *btf,
const char *type_name, __u32 kind);
LIBBPF_API __u32 btf__type_cnt(const struct btf *btf);
LIBBPF_API const struct btf *btf__base_btf(const struct btf *btf);
LIBBPF_API const struct btf_type *btf__type_by_id(const struct btf *btf,

1
tools/lib/bpf/libbpf.map
View File

@@ -460,5 +460,6 @@ LIBBPF_1.8.0 {
global:
bpf_program__attach_tracing_multi;
bpf_program__clone;
btf__find_by_name_kind_own;
btf__new_empty_opts;
} LIBBPF_1.7.0;

2
tools/lib/bpf/libbpf_internal.h
View File

@@ -596,8 +596,6 @@ typedef int (*type_id_visit_fn)(__u32 *type_id, void *ctx);
typedef int (*str_off_visit_fn)(__u32 *str_off, void *ctx);
int btf_ext_visit_type_ids(struct btf_ext *btf_ext, type_id_visit_fn visit, void *ctx);
int btf_ext_visit_str_offs(struct btf_ext *btf_ext, str_off_visit_fn visit, void *ctx);
__s32 btf__find_by_name_kind_own(const struct btf *btf, const char *type_name,
__u32 kind);
/* handle direct returned errors */
static inline int libbpf_err(int ret)