cgroups_rs/fs/
systemd.rs

1// Copyright (c) 2020 Ant Group
2//
3// SPDX-License-Identifier: Apache-2.0 or MIT
4//
5
6//! This module contains the implementation of the `systemd` cgroup subsystem.
7//!
8use std::path::PathBuf;
9
10use crate::fs::error::*;
11
12use crate::fs::{ControllIdentifier, ControllerInternal, Controllers, Resources, Subsystem};
13
14/// A controller that allows controlling the `systemd` subsystem of a Cgroup.
15///
16#[derive(Debug, Clone)]
17pub struct SystemdController {
18    base: PathBuf,
19    path: PathBuf,
20    _v2: bool,
21}
22
23impl ControllerInternal for SystemdController {
24    fn control_type(&self) -> Controllers {
25        Controllers::Systemd
26    }
27    fn get_path(&self) -> &PathBuf {
28        &self.path
29    }
30    fn get_path_mut(&mut self) -> &mut PathBuf {
31        &mut self.path
32    }
33    fn get_base(&self) -> &PathBuf {
34        &self.base
35    }
36
37    fn apply(&self, _res: &Resources) -> Result<()> {
38        Ok(())
39    }
40}
41
42impl ControllIdentifier for SystemdController {
43    fn controller_type() -> Controllers {
44        Controllers::Systemd
45    }
46}
47
48impl<'a> From<&'a Subsystem> for &'a SystemdController {
49    fn from(sub: &'a Subsystem) -> &'a SystemdController {
50        unsafe {
51            match sub {
52                Subsystem::Systemd(c) => c,
53                _ => {
54                    assert_eq!(1, 0);
55                    let v = std::mem::MaybeUninit::uninit();
56                    v.assume_init()
57                }
58            }
59        }
60    }
61}
62
63impl SystemdController {
64    /// Constructs a new `SystemdController` with `root` serving as the root of the control group.
65    pub fn new(point: PathBuf, root: PathBuf, v2: bool) -> Self {
66        Self {
67            base: root,
68            path: point,
69            _v2: v2,
70        }
71    }
72}
cgroups_rs/fs/systemd.rs

cgroups_rs/fs/
systemd.rs
