94 lines
1.7 KiB
Go
94 lines
1.7 KiB
Go
package cgroups
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import (
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"fmt"
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specs "github.com/opencontainers/runtime-spec/specs-go"
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)
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// Name is a typed name for a cgroup subsystem
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type Name string
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const (
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Devices Name = "devices"
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Hugetlb Name = "hugetlb"
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Freezer Name = "freezer"
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Pids Name = "pids"
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NetCLS Name = "net_cls"
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NetPrio Name = "net_prio"
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PerfEvent Name = "perf_event"
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Cpuset Name = "cpuset"
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Cpu Name = "cpu"
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Cpuacct Name = "cpuacct"
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Memory Name = "memory"
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Blkio Name = "blkio"
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)
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// Subsystems returns a complete list of the default cgroups
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// avaliable on most linux systems
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func Subsystems() []Name {
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n := []Name{
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Hugetlb,
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Freezer,
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Pids,
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NetCLS,
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NetPrio,
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PerfEvent,
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Cpuset,
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Cpu,
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Cpuacct,
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Memory,
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Blkio,
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}
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if !isUserNS {
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n = append(n, Devices)
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}
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return n
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}
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type Subsystem interface {
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Name() Name
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}
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type pather interface {
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Subsystem
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Path(path string) string
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}
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type creator interface {
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Subsystem
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Create(path string, resources *specs.LinuxResources) error
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}
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type deleter interface {
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Subsystem
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Delete(path string) error
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}
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type stater interface {
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Subsystem
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Stat(path string, stats *Stats) error
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}
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type updater interface {
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Subsystem
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Update(path string, resources *specs.LinuxResources) error
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}
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// SingleSubsystem returns a single cgroup subsystem within the base Hierarchy
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func SingleSubsystem(baseHierarchy Hierarchy, subsystem Name) Hierarchy {
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return func() ([]Subsystem, error) {
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subsystems, err := baseHierarchy()
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if err != nil {
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return nil, err
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}
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for _, s := range subsystems {
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if s.Name() == subsystem {
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return []Subsystem{
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s,
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}, nil
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}
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}
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return nil, fmt.Errorf("unable to find subsystem %s", subsystem)
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}
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}
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