From 5f8f8b93aeb8371c54af08bece2bd04bc2d48707 Mon Sep 17 00:00:00 2001
From: Alexei Starovoitov <ast@kernel.org>
Date: Mon, 25 Feb 2019 14:28:40 -0800
Subject: [PATCH] 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>
---
include/uapi/linux/bpf.h | 2 ++
kernel/bpf/syscall.c | 5 +++++
2 files changed, 7 insertions(+)
diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index bcdd2474eee75..2e308e90ffead 100644
--- 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
index 31cf66fc3f5cf..174581dfe225f 100644
--- 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;
--
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