bpf: expose program stats via bpf_prog_info

Return bpf program run_time_ns and run_cnt via bpf_prog_info Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
torvalds · Feb 27, 2019 · 5f8f8b9 · 5f8f8b9
1 parent 492ecee
commit 5f8f8b9
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diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
@@ -2813,6 +2813,8 @@ struct bpf_prog_info {
 	__u32 jited_line_info_rec_size;
 	__u32 nr_prog_tags;
 	__aligned_u64 prog_tags;
+	__u64 run_time_ns;
+	__u64 run_cnt;
 } __attribute__((aligned(8)));
 
 struct bpf_map_info {

diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
@@ -2152,6 +2152,7 @@ static int bpf_prog_get_info_by_fd(struct bpf_prog *prog,
 	struct bpf_prog_info __user *uinfo = u64_to_user_ptr(attr->info.info);
 	struct bpf_prog_info info = {};
 	u32 info_len = attr->info.info_len;
+	struct bpf_prog_stats stats;
 	char __user *uinsns;
 	u32 ulen;
 	int err;
@@ -2191,6 +2192,10 @@ static int bpf_prog_get_info_by_fd(struct bpf_prog *prog,
 	if (err)
 		return err;
 
+	bpf_prog_get_stats(prog, &stats);
+	info.run_time_ns = stats.nsecs;
+	info.run_cnt = stats.cnt;
+
 	if (!capable(CAP_SYS_ADMIN)) {
 		info.jited_prog_len = 0;
 		info.xlated_prog_len = 0;