update vendor to use containerd cgroups

vendor/github.com/containerd/cgroups/control.go

@@ -0,0 +1,99 @@
+/*
+   Copyright The containerd Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package cgroups
+
+import (
+	"os"
+
+	v1 "github.com/containerd/cgroups/stats/v1"
+	specs "github.com/opencontainers/runtime-spec/specs-go"
+)
+
+type procType = string
+
+const (
+	cgroupProcs    procType = "cgroup.procs"
+	cgroupTasks    procType = "tasks"
+	defaultDirPerm          = 0755
+)
+
+// defaultFilePerm is a var so that the test framework can change the filemode
+// of all files created when the tests are running.  The difference between the
+// tests and real world use is that files like "cgroup.procs" will exist when writing
+// to a read cgroup filesystem and do not exist prior when running in the tests.
+// this is set to a non 0 value in the test code
+var defaultFilePerm = os.FileMode(0)
+
+type Process struct {
+	// Subsystem is the name of the subsystem that the process / task is in.
+	Subsystem Name
+	// Pid is the process id of the process / task.
+	Pid int
+	// Path is the full path of the subsystem and location that the process / task is in.
+	Path string
+}
+
+type Task = Process
+
+// Cgroup handles interactions with the individual groups to perform
+// actions on them as them main interface to this cgroup package
+type Cgroup interface {
+	// New creates a new cgroup under the calling cgroup
+	New(string, *specs.LinuxResources) (Cgroup, error)
+	// Add adds a process to the cgroup (cgroup.procs). Without additional arguments,
+	// the process is added to all the cgroup subsystems. When giving Add a list of
+	// subsystem names, the process is only added to those subsystems, provided that
+	// they are active in the targeted cgroup.
+	Add(Process, ...Name) error
+	// AddProc adds the process with the given id to the cgroup (cgroup.procs).
+	// Without additional arguments, the process with the given id is added to all
+	// the cgroup subsystems. When giving AddProc a list of subsystem names, the process
+	// id is only added to those subsystems, provided that they are active in the targeted
+	// cgroup.
+	AddProc(uint64, ...Name) error
+	// AddTask adds a process to the cgroup (tasks). Without additional arguments, the
+	// task is added to all the cgroup subsystems. When giving AddTask a list of subsystem
+	// names, the task is only added to those subsystems, provided that they are active in
+	// the targeted cgroup.
+	AddTask(Process, ...Name) error
+	// Delete removes the cgroup as a whole
+	Delete() error
+	// MoveTo moves all the processes under the calling cgroup to the provided one
+	// subsystems are moved one at a time
+	MoveTo(Cgroup) error
+	// Stat returns the stats for all subsystems in the cgroup
+	Stat(...ErrorHandler) (*v1.Metrics, error)
+	// Update updates all the subsystems with the provided resource changes
+	Update(resources *specs.LinuxResources) error
+	// Processes returns all the processes in a select subsystem for the cgroup
+	Processes(Name, bool) ([]Process, error)
+	// Tasks returns all the tasks in a select subsystem for the cgroup
+	Tasks(Name, bool) ([]Task, error)
+	// Freeze freezes or pauses all processes inside the cgroup
+	Freeze() error
+	// Thaw thaw or resumes all processes inside the cgroup
+	Thaw() error
+	// OOMEventFD returns the memory subsystem's event fd for OOM events
+	OOMEventFD() (uintptr, error)
+	// RegisterMemoryEvent returns the memory subsystems event fd for whatever memory event was
+	// registered for. Can alternatively register for the oom event with this method.
+	RegisterMemoryEvent(MemoryEvent) (uintptr, error)
+	// State returns the cgroups current state
+	State() State
+	// Subsystems returns all the subsystems in the cgroup
+	Subsystems() []Subsystem
+}