diff options
| author | Alexei Starovoitov <ast@kernel.org> | 2018-03-28 21:05:38 +0200 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2018-03-28 22:55:19 +0200 |
| commit | a0fe3e574b50461c4811ce81811f0eaefda62871 (patch) | |
| tree | 5bb54d6a41ea191ac880d30d96b26542210a2deb /tools | |
| parent | bpf: introduce BPF_RAW_TRACEPOINT (diff) | |
| download | linux-a0fe3e574b50461c4811ce81811f0eaefda62871.tar.xz linux-a0fe3e574b50461c4811ce81811f0eaefda62871.zip | |
libbpf: add bpf_raw_tracepoint_open helper
add bpf_raw_tracepoint_open(const char *name, int prog_fd) api to libbpf
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/include/uapi/linux/bpf.h | 11 | ||||
| -rw-r--r-- | tools/lib/bpf/bpf.c | 11 | ||||
| -rw-r--r-- | tools/lib/bpf/bpf.h | 1 |
3 files changed, 23 insertions, 0 deletions
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h index d245c41213ac..58060bec999d 100644 --- a/tools/include/uapi/linux/bpf.h +++ b/tools/include/uapi/linux/bpf.h @@ -94,6 +94,7 @@ enum bpf_cmd { BPF_MAP_GET_FD_BY_ID, BPF_OBJ_GET_INFO_BY_FD, BPF_PROG_QUERY, + BPF_RAW_TRACEPOINT_OPEN, }; enum bpf_map_type { @@ -134,6 +135,7 @@ enum bpf_prog_type { BPF_PROG_TYPE_SK_SKB, BPF_PROG_TYPE_CGROUP_DEVICE, BPF_PROG_TYPE_SK_MSG, + BPF_PROG_TYPE_RAW_TRACEPOINT, }; enum bpf_attach_type { @@ -344,6 +346,11 @@ union bpf_attr { __aligned_u64 prog_ids; __u32 prog_cnt; } query; + + struct { + __u64 name; + __u32 prog_fd; + } raw_tracepoint; } __attribute__((aligned(8))); /* BPF helper function descriptions: @@ -1151,4 +1158,8 @@ struct bpf_cgroup_dev_ctx { __u32 minor; }; +struct bpf_raw_tracepoint_args { + __u64 args[0]; +}; + #endif /* _UAPI__LINUX_BPF_H__ */ diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c index 592a58a2b681..e0500055f1a6 100644 --- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c @@ -428,6 +428,17 @@ int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32 *info_len) return err; } +int bpf_raw_tracepoint_open(const char *name, int prog_fd) +{ + union bpf_attr attr; + + bzero(&attr, sizeof(attr)); + attr.raw_tracepoint.name = ptr_to_u64(name); + attr.raw_tracepoint.prog_fd = prog_fd; + + return sys_bpf(BPF_RAW_TRACEPOINT_OPEN, &attr, sizeof(attr)); +} + int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags) { struct sockaddr_nl sa; diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h index 8d18fb73d7fb..ee59342c6f42 100644 --- a/tools/lib/bpf/bpf.h +++ b/tools/lib/bpf/bpf.h @@ -79,4 +79,5 @@ int bpf_map_get_fd_by_id(__u32 id); int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32 *info_len); int bpf_prog_query(int target_fd, enum bpf_attach_type type, __u32 query_flags, __u32 *attach_flags, __u32 *prog_ids, __u32 *prog_cnt); +int bpf_raw_tracepoint_open(const char *name, int prog_fd); #endif |