History

bpf: expose program stats via bpf_prog_info

Return bpf program run_time_ns and run_cnt via bpf_prog_info

Alexei Starovoitov committed 7 years ago

Commit 5f8f8b91 parent 492ecee2 files · +7 −0Browse files

Unified · Split

2 files
  1. include/uapi/linux/bpf.h +2 −0
  2. kernel/bpf/syscall.c +5 −0
include/uapi/linux/bpf.h+2−0
@@ -2813,6 +2813,8 @@ struct bpf_prog_info { · 2812 unmodified lines
2813 __u32 jited_line_info_rec_size;2813 __u32 jited_line_info_rec_size;
2814 __u32 nr_prog_tags;2814 __u32 nr_prog_tags;
2815 __aligned_u64 prog_tags;2815 __aligned_u64 prog_tags;
2816 __u64 run_time_ns;
2817 __u64 run_cnt;
2816} __attribute__((aligned(8)));2818} __attribute__((aligned(8)));
2817 2819
2818struct bpf_map_info {2820struct bpf_map_info {
kernel/bpf/syscall.c+5−0
@@ -2152,6 +2152,7 @@ static int bpf_prog_get_info_by_fd(struct bpf_prog *prog, · 2151 unmodified lines
2152 struct bpf_prog_info __user *uinfo = u64_to_user_ptr(attr->info.info);2152 struct bpf_prog_info __user *uinfo = u64_to_user_ptr(attr->info.info);
2153 struct bpf_prog_info info = {};2153 struct bpf_prog_info info = {};
2154 u32 info_len = attr->info.info_len;2154 u32 info_len = attr->info.info_len;
2155 struct bpf_prog_stats stats;
2155 char __user *uinsns;2156 char __user *uinsns;
2156 u32 ulen;2157 u32 ulen;
2157 int err;2158 int err;
@@ -2191,6 +2192,10 @@ static int bpf_prog_get_info_by_fd(struct bpf_prog *prog, · 33 unmodified lines
2191 if (err)2192 if (err)
2192 return err;2193 return err;
2193 2194
2195 bpf_prog_get_stats(prog, &stats);
2196 info.run_time_ns = stats.nsecs;
2197 info.run_cnt = stats.cnt;
2198
2194 if (!capable(CAP_SYS_ADMIN)) {2199 if (!capable(CAP_SYS_ADMIN)) {
2195 info.jited_prog_len = 0;2200 info.jited_prog_len = 0;
2196 info.xlated_prog_len = 0;2201 info.xlated_prog_len = 0;