Struct CgroupRoot 

pub struct CgroupRoot {
    pub hierarchy_id: u32,
    pub controllers: BTreeSet<ControllerType>,
    /* private fields */
}

CgroupRoot is the root of the cgroup hierarchy. The root cgroup is different from the rest of the cgroups in a cgroup hierarchy (sub-cgroups of the root) in a few ways:

• The root contains all known processes on cgroup creation, and all new processes as they are spawned. As such, the root cgroup reports processes belonging to it differently than its sub-cgroups.

• The root does not contain resource controller interface files, as otherwise they would apply to the whole system.

• The root does not own a FsNode as it is created and owned by the FileSystem instead.

Fields

hierarchy_id: u32

The ID of this hierarchy. 0 is reserved for cgroup v2.

controllers: BTreeSet<ControllerType>

Controllers supported by this hierarchy.

Implementations

impl CgroupRoot

pub fn new( hierarchy_id: u32, controllers: BTreeSet<ControllerType>, ) -> Arc<CgroupRoot>

pub fn has_controller(&self, controller: ControllerType) -> bool

pub fn get_cgroup<TG: Copy + Into<ThreadGroupKey>>( &self, tg: TG, ) -> Option<Weak<Cgroup>>

pub fn get_cgroup_inspect(&self) -> Inspector

Trait Implementations

impl CgroupOps for CgroupRoot

fn id(&self) -> u64

Returns the unique ID of the cgroup. ID of root cgroup is 0.

fn add_process(&self, thread_group: &ThreadGroup) -> Result<(), Errno>

Add a process to a cgroup. Errors if the cgroup has been deleted.

fn new_child(&self, name: &FsStr) -> Result<CgroupHandle, Errno>

Create a new sub-cgroup as a child of this cgroup. Errors if the cgroup is deleted, or a child with name already exists.

fn get_child(&self, name: &FsStr) -> Result<CgroupHandle, Errno>

Gets the child with name, errors if not found.

fn remove_child(&self, name: &FsStr) -> Result<CgroupHandle, Errno>

Remove a child from this cgroup and return it, if found. Errors if cgroup is deleted, or a child with name is not found.

fn get_children(&self) -> Result<Vec<CgroupHandle>, Errno>

Gets all children of this cgroup.

fn get_pids(&self, kernel: &Kernel) -> Vec<pid_t>

Return all pids that belong to this cgroup.

fn kill(&self)

Kills all processes in the cgroup and its descendants.

fn is_populated(&self) -> bool

Whether the cgroup or any of its descendants have any processes.

fn freezer(&self) -> Option<&dyn FreezerOps>

Returns freezer ops if freezer controller is supported.

fn cpuset(&self) -> Option<&dyn CpusetOps>

Returns cpuset ops if cpuset controller is supported.

impl CpusetOps for CgroupRoot

fn cpuset_cpus(&self) -> Vec<u32>

Returns the cpuset cpus of the cgroup.

fn set_cpuset_cpus(&self, _cpus: Vec<u32>)

Sets the cpuset cpus of the cgroup.

impl Debug for CgroupRoot

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.