Move dbus code to libcgroups create

crates/libcgroups/src/common.rs

@@ -189,7 +189,7 @@ pub fn create_cgroup_manager<P: Into<PathBuf>>(
                     bail!("systemd cgroup flag passed, but systemd support for managing cgroups is not available");
                 }
                 log::info!("systemd cgroup manager will be used");
-                return Ok(Box::new(v2::SystemDCGroupManager::new(
+                return Ok(Box::new(crate::systemd::manager::Manager::new(
                     DEFAULT_CGROUP_ROOT.into(),
                     cgroup_path.into(),
                 )?));

crates/libcgroups/src/lib.rs

@@ -8,6 +8,7 @@ mod test;
 
 pub mod common;
 pub mod stats;
+pub mod systemd;
 pub mod test_manager;
 pub mod v1;
 pub mod v2;

crates/libcgroups/src/systemd/controller_type.rs

@@ -0,0 +1,39 @@
+use std::fmt::Display;
+
+pub enum ControllerType {
+    Cpu,
+    Io,
+    Memory,
+    Tasks,
+}
+
+impl Display for ControllerType {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        let print = match self {
+            ControllerType::Cpu => "cpu",
+            ControllerType::Io => "io",
+            ControllerType::Memory => "memory",
+            ControllerType::Tasks => "tasks",
+        };
+
+        write!(f, "{}", print)
+    }
+}
+
+impl AsRef<str> for ControllerType {
+    fn as_ref(&self) -> &str {
+        match self {
+            ControllerType::Cpu => "cpu",
+            ControllerType::Io => "io",
+            ControllerType::Memory => "memory",
+            ControllerType::Tasks => "tasks",
+        }
+    }
+}
+
+pub const CONTROLLER_TYPES: &[ControllerType] = &[
+    ControllerType::Cpu,
+    ControllerType::Io,
+    ControllerType::Memory,
+    ControllerType::Tasks,
+];

crates/libcgroups/src/systemd/dbus/client.rs

@@ -1,6 +1,6 @@
-use crate::dbus::systemd_manager::OrgFreedesktopSystemd1Manager;
+use crate::systemd::dbus::systemd_api::OrgFreedesktopSystemd1Manager;
 use anyhow::Result;
-use dbus::arg::{RefArg, Variant, PropMap};
+use dbus::arg::{PropMap, Variant};
 use dbus::blocking::Connection;
 use std::time::Duration;
 
@@ -25,7 +25,7 @@ impl Client {
         unit_name: &str,
         mut properties_map: PropMap,
     ) -> Result<()> {
-        // To view and introspect the methods under the 'org.freedesktop.systemd1' destination 
+        // To view and introspect the methods under the 'org.freedesktop.systemd1' destination
         // and object path under it use the following command:
         // `gdbus introspect --system --dest org.freedesktop.systemd1 --object-path /org/freedesktop/systemd1`
         let proxy = self.conn.with_proxy(
@@ -62,7 +62,7 @@ impl Client {
 
         let mut properties = vec![];
         for (name, variant) in &mut properties_map.iter() {
-            let s : &str = &*name;
+            let s: &str = &*name;
             properties.push((s, variant.to_owned()));
         }
         //proxy.start_transient_unit(unit_name, "replace", properties, vec![])?;

crates/libcgroups/src/systemd/dbus/mod.rs

@@ -0,0 +1,2 @@
+pub(crate) mod client;
+pub(crate) mod systemd_api;

crates/libcgroups/src/systemd/manager.rs

@@ -8,12 +8,9 @@ use anyhow::{anyhow, bail, Result};
 use nix::unistd::Pid;
 use std::path::{Path, PathBuf};
 
+use super::controller_type::{ControllerType, CONTROLLER_TYPES};
 #[cfg(feature = "cgroupsv2_devices")]
 use super::devices::Devices;
-use super::{
-    controller::Controller, controller_type::ControllerType, cpu::Cpu, cpuset::CpuSet,
-    freezer::Freezer, hugetlb::HugeTlb, io::Io, memory::Memory, pids::Pids,
-};
 use crate::common::{self, CgroupManager, ControllerOpt, FreezerState, PathBufExt};
 use crate::stats::Stats;
 
@@ -21,16 +18,8 @@ const CGROUP_PROCS: &str = "cgroup.procs";
 const CGROUP_CONTROLLERS: &str = "cgroup.controllers";
 const CGROUP_SUBTREE_CONTROL: &str = "cgroup.subtree_control";
 
-// v2 systemd only supports cpu, io, memory and pids.
-const CONTROLLER_TYPES: &[ControllerType] = &[
-    ControllerType::Cpu,
-    ControllerType::Io,
-    ControllerType::Memory,
-    ControllerType::Pids,
-];
-
 /// SystemDCGroupManager is a driver for managing cgroups via systemd.
-pub struct SystemDCGroupManager {
+pub struct Manager {
     root_path: PathBuf,
     cgroups_path: PathBuf,
     full_path: PathBuf,
@@ -46,14 +35,14 @@ struct CgroupsPath {
     name: String,
 }
 
-impl SystemDCGroupManager {
+impl Manager {
     pub fn new(root_path: PathBuf, cgroups_path: PathBuf) -> Result<Self> {
         // TODO: create the systemd unit using a dbus client.
         let destructured_path = Self::destructure_cgroups_path(cgroups_path)?;
         let cgroups_path = Self::construct_cgroups_path(destructured_path)?;
         let full_path = root_path.join_safely(&cgroups_path)?;
 
-        Ok(SystemDCGroupManager {
+        Ok(Manager {
             root_path,
             cgroups_path,
             full_path,
@@ -203,7 +192,7 @@ impl SystemDCGroupManager {
                 "cpu" => controllers.push(ControllerType::Cpu),
                 "io" => controllers.push(ControllerType::Io),
                 "memory" => controllers.push(ControllerType::Memory),
-                "pids" => controllers.push(ControllerType::Pids),
+                "pids" => controllers.push(ControllerType::Tasks),
                 _ => continue,
             }
         }
@@ -220,7 +209,7 @@ impl SystemDCGroupManager {
     }
 }
 
-impl CgroupManager for SystemDCGroupManager {
+impl CgroupManager for Manager {
     fn add_task(&self, pid: Pid) -> Result<()> {
         // Dont attach any pid to the cgroup if -1 is specified as a pid
         if pid.as_raw() == -1 {
@@ -234,12 +223,7 @@ impl CgroupManager for SystemDCGroupManager {
     fn apply(&self, controller_opt: &ControllerOpt) -> Result<()> {
         for controller in CONTROLLER_TYPES {
             match controller {
-                ControllerType::Cpu => Cpu::apply(controller_opt, &self.full_path)?,
-                ControllerType::CpuSet => CpuSet::apply(controller_opt, &self.full_path)?,
-                ControllerType::HugeTlb => HugeTlb::apply(controller_opt, &self.full_path)?,
-                ControllerType::Io => Io::apply(controller_opt, &self.full_path)?,
-                ControllerType::Memory => Memory::apply(controller_opt, &self.full_path)?,
-                ControllerType::Pids => Pids::apply(controller_opt, &self.full_path)?,
+                _ => {}
             }
         }
 
@@ -253,13 +237,7 @@ impl CgroupManager for SystemDCGroupManager {
     }
 
     fn freeze(&self, state: FreezerState) -> Result<()> {
-        let controller_opt = ControllerOpt {
-            resources: &Default::default(),
-            freezer_state: Some(state),
-            oom_score_adj: None,
-            disable_oom_killer: false,
-        };
-        Freezer::apply(&controller_opt, &self.full_path)
+        todo!();
     }
 
     fn stats(&self) -> Result<Stats> {
@@ -278,7 +256,7 @@ mod tests {
     #[test]
     fn expand_slice_works() -> Result<()> {
         assert_eq!(
-            SystemDCGroupManager::expand_slice("test-a-b.slice")?,
+            Manager::expand_slice("test-a-b.slice")?,
             PathBuf::from("/test.slice/test-a.slice/test-a-b.slice"),
         );
 
@@ -287,13 +265,12 @@ mod tests {
 
     #[test]
     fn get_cgroups_path_works_with_a_complex_slice() -> Result<()> {
-        let cgroups_path = SystemDCGroupManager::destructure_cgroups_path(PathBuf::from(
-            "test-a-b.slice:docker:foo",
-        ))
-        .expect("");
+        let cgroups_path =
+            Manager::destructure_cgroups_path(PathBuf::from("test-a-b.slice:docker:foo"))
+                .expect("");
 
         assert_eq!(
-            SystemDCGroupManager::construct_cgroups_path(cgroups_path)?,
+            Manager::construct_cgroups_path(cgroups_path)?,
             PathBuf::from("/test.slice/test-a.slice/test-a-b.slice/docker-foo.scope"),
         );
 
@@ -302,13 +279,11 @@ mod tests {
 
     #[test]
     fn get_cgroups_path_works_with_a_simple_slice() -> Result<()> {
-        let cgroups_path = SystemDCGroupManager::destructure_cgroups_path(PathBuf::from(
-            "machine.slice:libpod:foo",
-        ))
-        .expect("");
+        let cgroups_path =
+            Manager::destructure_cgroups_path(PathBuf::from("machine.slice:libpod:foo")).expect("");
 
         assert_eq!(
-            SystemDCGroupManager::construct_cgroups_path(cgroups_path)?,
+            Manager::construct_cgroups_path(cgroups_path)?,
             PathBuf::from("/machine.slice/libpod-foo.scope"),
         );
 
@@ -318,10 +293,10 @@ mod tests {
     #[test]
     fn get_cgroups_path_works_with_scope() -> Result<()> {
         let cgroups_path =
-            SystemDCGroupManager::destructure_cgroups_path(PathBuf::from(":docker:foo")).expect("");
+            Manager::destructure_cgroups_path(PathBuf::from(":docker:foo")).expect("");
 
         assert_eq!(
-            SystemDCGroupManager::construct_cgroups_path(cgroups_path)?,
+            Manager::construct_cgroups_path(cgroups_path)?,
             PathBuf::from("/machine.slice/docker-foo.scope"),
         );
 

crates/libcgroups/src/systemd/mod.rs

@@ -0,0 +1,3 @@
+pub mod controller_type;
+mod dbus;
+pub mod manager;

crates/libcgroups/src/v2/mod.rs

@@ -2,15 +2,13 @@ mod controller;
 pub mod controller_type;
 mod cpu;
 mod cpuset;
+#[cfg(feature = "cgroupsv2_devices")]
+pub mod devices;
 mod freezer;
 mod hugetlb;
 mod io;
 pub mod manager;
 mod memory;
 mod pids;
-pub mod systemd_manager;
 mod unified;
 pub mod util;
-pub use systemd_manager::SystemDCGroupManager;
-#[cfg(feature = "cgroupsv2_devices")]
-pub mod devices;

crates/libcontainer/src/dbus/mod.rs

@@ -1,2 +0,0 @@
-pub mod client;
-mod systemd_manager;

crates/libcontainer/src/lib.rs

@@ -1,7 +1,6 @@
 pub mod apparmor;
 pub mod capabilities;
 pub mod container;
-pub mod dbus;
 pub mod hooks;
 pub mod namespaces;
 pub mod notify_socket;