add get cpu.max

src/bin/izoli.rs

@@ -15,6 +15,7 @@ fn main() {
     println!("{:?}", cgroup.get_stat());
     println!("{:?}", cgroup.get_max_depth());
     println!("{:?}", cgroup.get_max_descendants());
+    println!("{:?}", cgroup.get_cpu_max());
 
     cgroup
         .add_subtree_control(cgroup.get_controllers().unwrap())

src/cgroup/cgroup.rs

@@ -6,7 +6,10 @@ use std::{
     str::FromStr,
 };
 
-use super::{cgroup_stat::CGroupStat, controller::Controller, limit_value::CGroupLimitValue};
+use super::{
+    cgroup_stat::CGroupStat, controller::Controller, cpu_limit::CpuLimit,
+    limit_value::CGroupLimitValue,
+};
 
 pub struct CGroup {
     pub path: PathBuf,
@@ -167,6 +170,14 @@ impl CGroup {
         self.write_list("cgroup.threads", threads)
     }
 
+    // cpu read
+
+    pub fn get_cpu_max(&self) -> Result<CpuLimit, std::io::Error> {
+        let max = self.read("cpu.max")?;
+
+        Ok(CpuLimit::from_str(&max).unwrap())
+    }
+
     fn write_value<T>(&self, name: &str, value: T) -> Result<(), std::io::Error>
     where
         T: fmt::Display,

src/cgroup/mod.rs

@@ -1,4 +1,5 @@
 pub mod cgroup;
 pub mod cgroup_stat;
 pub mod controller;
+pub mod cpu_limit;
 pub mod limit_value;