diff options
| author | Andrii Nakryiko <andrii@kernel.org> | 2021-08-15 00:06:03 -0700 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2021-08-17 00:45:08 +0200 |
| commit | 3ec84f4b1638495ebff068a668dc417b4de5727e (patch) | |
| tree | d3f711331cd4c4fd2ecd7c01cd68316ec81c3399 /tools/lib/bpf/bpf.h | |
| parent | 668ace0ea5ab5acdb33cff0b66fcd8f41c16a0b0 (diff) | |
libbpf: Add bpf_cookie support to bpf_link_create() API
Add ability to specify bpf_cookie value when creating BPF perf link with
bpf_link_create() low-level API.
Given BPF_LINK_CREATE command is growing and keeps getting new fields that are
specific to the type of BPF_LINK, extend libbpf side of bpf_link_create() API
and corresponding OPTS struct to accomodate such changes. Add extra checks to
prevent using incompatible/unexpected combinations of fields.
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20210815070609.987780-11-andrii@kernel.org
Diffstat (limited to 'tools/lib/bpf/bpf.h')
| -rw-r--r-- | tools/lib/bpf/bpf.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h index 4f758f8f50cd..6fffb3cdf39b 100644 --- a/tools/lib/bpf/bpf.h +++ b/tools/lib/bpf/bpf.h @@ -177,8 +177,14 @@ struct bpf_link_create_opts { union bpf_iter_link_info *iter_info; __u32 iter_info_len; __u32 target_btf_id; + union { + struct { + __u64 bpf_cookie; + } perf_event; + }; + size_t :0; }; -#define bpf_link_create_opts__last_field target_btf_id +#define bpf_link_create_opts__last_field perf_event LIBBPF_API int bpf_link_create(int prog_fd, int target_fd, enum bpf_attach_type attach_type, |