diff options
| author | Andrey Ignatov <rdna@fb.com> | 2019-02-15 02:01:43 +0300 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2019-02-15 17:20:54 +0300 |
| commit | 789f6bab849e04ea029c09b81dc8401dc0268cf9 (patch) | |
| tree | 376d9ca0066237549b9fca7c81001bbf517f9967 /tools/lib | |
| parent | 1a11a4c74f73adb840d61371c3bb560ed4d7a87f (diff) | |
| download | linux-789f6bab849e04ea029c09b81dc8401dc0268cf9.tar.xz | |
libbpf: Introduce bpf_object__btf
Add new accessor for bpf_object to get opaque struct btf * from it.
struct btf * is needed for all operations with BTF and it's present in
bpf_object. The only thing missing is a way to get it.
Example use-case is to get BTF key_type_id and value_type_id for a map in
bpf_object. It can be done with btf__get_map_kv_tids() but that function
requires struct btf *.
Similar API can be added for struct btf_ext but no use-case for it yet.
Signed-off-by: Andrey Ignatov <rdna@fb.com>
Acked-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'tools/lib')
| -rw-r--r-- | tools/lib/bpf/libbpf.c | 5 | ||||
| -rw-r--r-- | tools/lib/bpf/libbpf.h | 3 | ||||
| -rw-r--r-- | tools/lib/bpf/libbpf.map | 1 |
3 files changed, 9 insertions, 0 deletions
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index 9597d4dace34..b38dcbe7460a 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -2331,6 +2331,11 @@ unsigned int bpf_object__kversion(struct bpf_object *obj) return obj ? obj->kern_version : 0; } +struct btf *bpf_object__btf(struct bpf_object *obj) +{ + return obj ? obj->btf : NULL; +} + int bpf_object__btf_fd(const struct bpf_object *obj) { return obj->btf ? btf__fd(obj->btf) : -1; diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index 987fd92661d6..6c0168f8bba5 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -89,6 +89,9 @@ LIBBPF_API int bpf_object__load(struct bpf_object *obj); LIBBPF_API int bpf_object__unload(struct bpf_object *obj); LIBBPF_API const char *bpf_object__name(struct bpf_object *obj); LIBBPF_API unsigned int bpf_object__kversion(struct bpf_object *obj); + +struct btf; +LIBBPF_API struct btf *bpf_object__btf(struct bpf_object *obj); LIBBPF_API int bpf_object__btf_fd(const struct bpf_object *obj); LIBBPF_API struct bpf_program * diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map index 16f342c3d4bc..99dfa710c818 100644 --- a/tools/lib/bpf/libbpf.map +++ b/tools/lib/bpf/libbpf.map @@ -132,6 +132,7 @@ LIBBPF_0.0.2 { bpf_probe_prog_type; bpf_map__resize; bpf_map_lookup_elem_flags; + bpf_object__btf; bpf_object__find_map_fd_by_name; bpf_get_link_xdp_id; btf__dedup; |