diff --git a/src/bin/izoli.rs b/src/bin/izoli.rs
index 8343580..641e57e 100644
--- a/src/bin/izoli.rs
+++ b/src/bin/izoli.rs
@@ -5,4 +5,5 @@ fn main() {
     let cgroup = CGroup::new("test").unwrap();
     println!("{:?}", cgroup.get_root_path());
     println!("{}", cgroup.check_status());
+    println!("{:?}", cgroup.read("cgroup.controllers"));
 }
diff --git a/src/cgroup/cgroup.rs b/src/cgroup/cgroup.rs
index 1b224a9..efb9c0d 100644
--- a/src/cgroup/cgroup.rs
+++ b/src/cgroup/cgroup.rs
@@ -4,6 +4,17 @@ use std::{
     path::{Path, PathBuf},
 };
 
+pub enum Controller {
+    Cpu,
+    Cpuset,
+    Memory,
+    Io,
+    Hugetlb,
+    Misc,
+    Pids,
+    Rdma,
+}
+
 pub struct CGroup {
     pub path: PathBuf,
 }