Contributors: 2
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Yonghong Song |
128 |
70.72% |
2 |
66.67% |
| Andrii Nakryiko |
53 |
29.28% |
1 |
33.33% |
| Total |
181 |
|
3 |
|
// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2018 Facebook
#include <linux/bpf.h>
#include "bpf_helpers.h"
struct {
__uint(type, BPF_MAP_TYPE_ARRAY);
__uint(max_entries, 1);
__type(key, __u32);
__type(value, __u64);
} cg_ids SEC(".maps");
struct {
__uint(type, BPF_MAP_TYPE_ARRAY);
__uint(max_entries, 1);
__type(key, __u32);
__type(value, __u32);
} pidmap SEC(".maps");
SEC("tracepoint/syscalls/sys_enter_nanosleep")
int trace(void *ctx)
{
__u32 pid = bpf_get_current_pid_tgid();
__u32 key = 0, *expected_pid;
__u64 *val;
expected_pid = bpf_map_lookup_elem(&pidmap, &key);
if (!expected_pid || *expected_pid != pid)
return 0;
val = bpf_map_lookup_elem(&cg_ids, &key);
if (val)
*val = bpf_get_current_cgroup_id();
return 0;
}
char _license[] SEC("license") = "GPL";
__u32 _version SEC("version") = 1; /* ignored by tracepoints, required by libbpf.a */