diff options
| author |   Alexei Starovoitov <ast@kernel.org> | 2019-11-14 10:57:05 -0800 |
|---|---|---|
| committer |   Daniel Borkmann <daniel@iogearbox.net> | 2019-11-15 23:42:14 +0100 |
| commit | 1442e2871b7679271fc9fcbf043ba1be511a7428 (patch) | |
| tree | 4c44a05835c152d723cbb8dac3c9f4103d289a74 /tools/lib | |
| parent | bpf: Introduce BPF trampoline (diff) | |
| download | linux-dev-1442e2871b7679271fc9fcbf043ba1be511a7428.tar.xz linux-dev-1442e2871b7679271fc9fcbf043ba1be511a7428.zip | |
libbpf: Introduce btf__find_by_name_kind()
Introduce btf__find_by_name_kind() helper to search BTF by name and kind, since
name alone can be ambiguous.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Song Liu <songliubraving@fb.com>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20191114185720.1641606-6-ast@kernel.org
Diffstat (limited to '')
| -rw-r--r-- | tools/lib/bpf/btf.c | 22 | ||||
| -rw-r--r-- | tools/lib/bpf/btf.h | 2 | ||||
| -rw-r--r-- | tools/lib/bpf/libbpf.map | 1 |
3 files changed, 25 insertions, 0 deletions
diff --git a/tools/lib/bpf/btf.c b/tools/lib/bpf/btf.c index 86a1847e4a9f..88efa2bb7137 100644 --- a/tools/lib/bpf/btf.c +++ b/tools/lib/bpf/btf.c @@ -316,6 +316,28 @@ __s32 btf__find_by_name(const struct btf *btf, const char *type_name) return -ENOENT; } +__s32 btf__find_by_name_kind(const struct btf *btf, const char *type_name, + __u32 kind) +{ + __u32 i; + + if (kind == BTF_KIND_UNKN || !strcmp(type_name, "void")) + return 0; + + for (i = 1; i <= btf->nr_types; i++) { + const struct btf_type *t = btf->types[i]; + const char *name; + + if (btf_kind(t) != kind) + continue; + name = btf__name_by_offset(btf, t->name_off); + if (name && !strcmp(type_name, name)) + return i; + } + + return -ENOENT; +} + void btf__free(struct btf *btf) { if (!btf) diff --git a/tools/lib/bpf/btf.h b/tools/lib/bpf/btf.h index b18994116a44..d9ac73a02cde 100644 --- a/tools/lib/bpf/btf.h +++ b/tools/lib/bpf/btf.h @@ -72,6 +72,8 @@ LIBBPF_API int btf__finalize_data(struct bpf_object *obj, struct btf *btf); LIBBPF_API int btf__load(struct btf *btf); 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 __u32 btf__get_nr_types(const struct btf *btf); LIBBPF_API const struct btf_type *btf__type_by_id(const struct btf *btf, __u32 id); diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map index 9f39ee06b2d4..420e69bfe699 100644 --- a/tools/lib/bpf/libbpf.map +++ b/tools/lib/bpf/libbpf.map @@ -204,4 +204,5 @@ LIBBPF_0.0.6 { bpf_program__is_tracing; bpf_program__set_tracing; bpf_program__size; + btf__find_by_name_kind; } LIBBPF_0.0.5; |