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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>
This commit is contained in:
Alexei Starovoitov 2019-02-25 14:28:40 -08:00 committed by Daniel Borkmann
parent 492ecee892
commit 5f8f8b93ae
2 changed files with 7 additions and 0 deletions
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2
include/uapi/linux/bpf.h
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@ -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 {

5
kernel/bpf/syscall.c
View File

@ -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;