diff options
| author |   Andrii Nakryiko <andriin@fb.com> | 2020-04-28 17:16:09 -0700 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2020-04-28 17:27:08 -0700 |
| commit | 0dbc866832a0fbf9f2b98d412da44c5cfd1b7756 (patch) | |
| tree | c34dd9df1ba6d23c9bba3034467376a2c08fd52c /tools/lib | |
| parent | bpf: Add support for BPF_OBJ_GET_INFO_BY_FD for bpf_link (diff) | |
| download | wireguard-linux-0dbc866832a0fbf9f2b98d412da44c5cfd1b7756.tar.xz wireguard-linux-0dbc866832a0fbf9f2b98d412da44c5cfd1b7756.zip | |
libbpf: Add low-level APIs for new bpf_link commands
Add low-level API calls for bpf_link_get_next_id() and
bpf_link_get_fd_by_id().
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200429001614.1544-6-andriin@fb.com
Diffstat (limited to 'tools/lib')
| -rw-r--r-- | tools/lib/bpf/bpf.c | 19 | ||||
| -rw-r--r-- | tools/lib/bpf/bpf.h | 4 | ||||
| -rw-r--r-- | tools/lib/bpf/libbpf.map | 6 |
3 files changed, 26 insertions, 3 deletions
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c index 5cc1b0785d18..8f2f0958d446 100644 --- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c @@ -721,6 +721,11 @@ int bpf_btf_get_next_id(__u32 start_id, __u32 *next_id) return bpf_obj_get_next_id(start_id, next_id, BPF_BTF_GET_NEXT_ID); } +int bpf_link_get_next_id(__u32 start_id, __u32 *next_id) +{ + return bpf_obj_get_next_id(start_id, next_id, BPF_LINK_GET_NEXT_ID); +} + int bpf_prog_get_fd_by_id(__u32 id) { union bpf_attr attr; @@ -751,13 +756,23 @@ int bpf_btf_get_fd_by_id(__u32 id) return sys_bpf(BPF_BTF_GET_FD_BY_ID, &attr, sizeof(attr)); } -int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32 *info_len) +int bpf_link_get_fd_by_id(__u32 id) +{ + union bpf_attr attr; + + memset(&attr, 0, sizeof(attr)); + attr.link_id = id; + + return sys_bpf(BPF_LINK_GET_FD_BY_ID, &attr, sizeof(attr)); +} + +int bpf_obj_get_info_by_fd(int bpf_fd, void *info, __u32 *info_len) { union bpf_attr attr; int err; memset(&attr, 0, sizeof(attr)); - attr.info.bpf_fd = prog_fd; + attr.info.bpf_fd = bpf_fd; attr.info.info_len = *info_len; attr.info.info = ptr_to_u64(info); diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h index 46d47afdd887..335b457b3a25 100644 --- a/tools/lib/bpf/bpf.h +++ b/tools/lib/bpf/bpf.h @@ -216,10 +216,12 @@ LIBBPF_API int bpf_prog_test_run(int prog_fd, int repeat, void *data, LIBBPF_API int bpf_prog_get_next_id(__u32 start_id, __u32 *next_id); LIBBPF_API int bpf_map_get_next_id(__u32 start_id, __u32 *next_id); LIBBPF_API int bpf_btf_get_next_id(__u32 start_id, __u32 *next_id); +LIBBPF_API int bpf_link_get_next_id(__u32 start_id, __u32 *next_id); LIBBPF_API int bpf_prog_get_fd_by_id(__u32 id); LIBBPF_API int bpf_map_get_fd_by_id(__u32 id); LIBBPF_API int bpf_btf_get_fd_by_id(__u32 id); -LIBBPF_API int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32 *info_len); +LIBBPF_API int bpf_link_get_fd_by_id(__u32 id); +LIBBPF_API int bpf_obj_get_info_by_fd(int bpf_fd, void *info, __u32 *info_len); LIBBPF_API int bpf_prog_query(int target_fd, enum bpf_attach_type type, __u32 query_flags, __u32 *attach_flags, __u32 *prog_ids, __u32 *prog_cnt); diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map index bb8831605b25..7cd49aa38005 100644 --- a/tools/lib/bpf/libbpf.map +++ b/tools/lib/bpf/libbpf.map @@ -254,3 +254,9 @@ LIBBPF_0.0.8 { bpf_program__set_lsm; bpf_set_link_xdp_fd_opts; } LIBBPF_0.0.7; + +LIBBPF_0.0.9 { + global: + bpf_link_get_fd_by_id; + bpf_link_get_next_id; +} LIBBPF_0.0.8; |