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| author | Andrii Nakryiko <andrii@kernel.org> | 2021-08-15 00:06:04 -0700 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2021-08-17 00:45:08 +0200 |
| commit | 47faff371755ba0f1ad76e2df7f5003377d974a5 (patch) | |
| tree | fe153bf46bdcfd9db8f22cdcfd18b1ebba2ea3c4 /tools/lib/bpf/libbpf.h | |
| parent | 3ec84f4b1638495ebff068a668dc417b4de5727e (diff) | |
| download | linux-47faff371755ba0f1ad76e2df7f5003377d974a5.tar.gz linux-47faff371755ba0f1ad76e2df7f5003377d974a5.tar.bz2 linux-47faff371755ba0f1ad76e2df7f5003377d974a5.zip | |
libbpf: Add bpf_cookie to perf_event, kprobe, uprobe, and tp attach APIs
Wire through bpf_cookie for all attach APIs that use perf_event_open under the
hood:
- for kprobes, extend existing bpf_kprobe_opts with bpf_cookie field;
- for perf_event, uprobe, and tracepoint APIs, add their _opts variants and
pass bpf_cookie through opts.
For kernel that don't support BPF_LINK_CREATE for perf_events, and thus
bpf_cookie is not supported either, return error and log warning for user.
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20210815070609.987780-12-andrii@kernel.org
Diffstat (limited to 'tools/lib/bpf/libbpf.h')
| -rw-r--r-- | tools/lib/bpf/libbpf.h | 71 |
1 files changed, 59 insertions, 12 deletions
diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index 1271d99bb7aa..1f4a67285365 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -104,17 +104,6 @@ struct bpf_object_open_opts { }; #define bpf_object_open_opts__last_field btf_custom_path -struct bpf_kprobe_opts { - /* size of this struct, for forward/backward compatiblity */ - size_t sz; - /* function's offset to install kprobe to */ - unsigned long offset; - /* kprobe is return probe */ - bool retprobe; - size_t :0; -}; -#define bpf_kprobe_opts__last_field retprobe - LIBBPF_API struct bpf_object *bpf_object__open(const char *path); LIBBPF_API struct bpf_object * bpf_object__open_file(const char *path, const struct bpf_object_open_opts *opts); @@ -255,24 +244,82 @@ LIBBPF_API int bpf_link__destroy(struct bpf_link *link); LIBBPF_API struct bpf_link * bpf_program__attach(struct bpf_program *prog); + +struct bpf_perf_event_opts { + /* size of this struct, for forward/backward compatiblity */ + size_t sz; + /* custom user-provided value fetchable through bpf_get_attach_cookie() */ + __u64 bpf_cookie; +}; +#define bpf_perf_event_opts__last_field bpf_cookie + LIBBPF_API struct bpf_link * bpf_program__attach_perf_event(struct bpf_program *prog, int pfd); + +LIBBPF_API struct bpf_link * +bpf_program__attach_perf_event_opts(struct bpf_program *prog, int pfd, + const struct bpf_perf_event_opts *opts); + +struct bpf_kprobe_opts { + /* size of this struct, for forward/backward compatiblity */ + size_t sz; + /* custom user-provided value fetchable through bpf_get_attach_cookie() */ + __u64 bpf_cookie; + /* function's offset to install kprobe to */ + unsigned long offset; + /* kprobe is return probe */ + bool retprobe; + size_t :0; +}; +#define bpf_kprobe_opts__last_field retprobe + LIBBPF_API struct bpf_link * bpf_program__attach_kprobe(struct bpf_program *prog, bool retprobe, const char *func_name); LIBBPF_API struct bpf_link * bpf_program__attach_kprobe_opts(struct bpf_program *prog, const char *func_name, - struct bpf_kprobe_opts *opts); + const struct bpf_kprobe_opts *opts); + +struct bpf_uprobe_opts { + /* size of this struct, for forward/backward compatiblity */ + size_t sz; + /* custom user-provided value fetchable through bpf_get_attach_cookie() */ + __u64 bpf_cookie; + /* uprobe is return probe, invoked at function return time */ + bool retprobe; + size_t :0; +}; +#define bpf_uprobe_opts__last_field retprobe + LIBBPF_API struct bpf_link * bpf_program__attach_uprobe(struct bpf_program *prog, bool retprobe, pid_t pid, const char *binary_path, size_t func_offset); LIBBPF_API struct bpf_link * +bpf_program__attach_uprobe_opts(struct bpf_program *prog, pid_t pid, + const char *binary_path, size_t func_offset, + const struct bpf_uprobe_opts *opts); + +struct bpf_tracepoint_opts { + /* size of this struct, for forward/backward compatiblity */ + size_t sz; + /* custom user-provided value fetchable through bpf_get_attach_cookie() */ + __u64 bpf_cookie; +}; +#define bpf_tracepoint_opts__last_field bpf_cookie + +LIBBPF_API struct bpf_link * bpf_program__attach_tracepoint(struct bpf_program *prog, const char *tp_category, const char *tp_name); LIBBPF_API struct bpf_link * +bpf_program__attach_tracepoint_opts(struct bpf_program *prog, + const char *tp_category, + const char *tp_name, + const struct bpf_tracepoint_opts *opts); + +LIBBPF_API struct bpf_link * bpf_program__attach_raw_tracepoint(struct bpf_program *prog, const char *tp_name); LIBBPF_API struct bpf_link * |