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| author |   Yonghong Song <yhs@fb.com> | 2019-02-04 11:00:58 -0800 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2019-02-04 12:48:36 -0800 |
| commit | 96408c43447aff5091a6938f29d8b6f2d0aa2064 (patch) | |
| tree | e59397b34c18fbca196e149502381e4efa1ad31c /tools/lib/bpf/libbpf.map | |
| parent | tools/bpf: expose functions btf_ext__* as API functions (diff) | |
| download | linux-dev-96408c43447aff5091a6938f29d8b6f2d0aa2064.tar.xz linux-dev-96408c43447aff5091a6938f29d8b6f2d0aa2064.zip | |
tools/bpf: implement libbpf btf__get_map_kv_tids() API function
Currently, to get map key/value type id's, the macro
BPF_ANNOTATE_KV_PAIR(<map_name>, <key_type>, <value_type>)
needs to be defined in the bpf program for the
corresponding map.
During program/map loading time,
the local static function bpf_map_find_btf_info()
in libbpf.c is implemented to retrieve the key/value
type ids given the map name.
The patch refactored function bpf_map_find_btf_info()
to create an API btf__get_map_kv_tids() which includes
the bulk of implementation for the original function.
The API btf__get_map_kv_tids() can be used by bcc,
a JIT based bpf compilation system, which uses the
same BPF_ANNOTATE_KV_PAIR to record map key/value types.
Acked-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to '')
| -rw-r--r-- | tools/lib/bpf/libbpf.map | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map index 46441c5f030b..7990e857e003 100644 --- a/tools/lib/bpf/libbpf.map +++ b/tools/lib/bpf/libbpf.map @@ -133,6 +133,7 @@ LIBBPF_0.0.2 { bpf_map_lookup_elem_flags; bpf_object__find_map_fd_by_name; bpf_get_link_xdp_id; + btf__get_map_kv_tids; btf_ext__free; btf_ext__func_info_rec_size; btf_ext__line_info_rec_size; |