Add glide.yaml and vendor deps

vendor/github.com/opencontainers/runc/libcontainer/README.md

@@ -0,0 +1,251 @@
+Libcontainer provides a native Go implementation for creating containers
+with namespaces, cgroups, capabilities, and filesystem access controls.
+It allows you to manage the lifecycle of the container performing additional operations
+after the container is created.
+
+
+#### Container
+A container is a self contained execution environment that shares the kernel of the
+host system and which is (optionally) isolated from other containers in the system.
+
+#### Using libcontainer
+
+Because containers are spawned in a two step process you will need a binary that
+will be executed as the init process for the container. In libcontainer, we use
+the current binary (/proc/self/exe) to be executed as the init process, and use
+arg "init", we call the first step process "bootstrap", so you always need a "init"
+function as the entry of "bootstrap".
+
+```go
+func init() {
+	if len(os.Args) > 1 && os.Args[1] == "init" {
+		runtime.GOMAXPROCS(1)
+		runtime.LockOSThread()
+		factory, _ := libcontainer.New("")
+		if err := factory.StartInitialization(); err != nil {
+			logrus.Fatal(err)
+		}
+		panic("--this line should have never been executed, congratulations--")
+	}
+}
+```
+
+Then to create a container you first have to initialize an instance of a factory
+that will handle the creation and initialization for a container.
+
+```go
+factory, err := libcontainer.New("/var/lib/container", libcontainer.Cgroupfs, libcontainer.InitArgs(os.Args[0], "init"))
+if err != nil {
+	logrus.Fatal(err)
+	return
+}
+```
+
+Once you have an instance of the factory created we can create a configuration
+struct describing how the container is to be created. A sample would look similar to this:
+
+```go
+defaultMountFlags := syscall.MS_NOEXEC | syscall.MS_NOSUID | syscall.MS_NODEV
+config := &configs.Config{
+	Rootfs: "/your/path/to/rootfs",
+	Capabilities: []string{
+		"CAP_CHOWN",
+		"CAP_DAC_OVERRIDE",
+		"CAP_FSETID",
+		"CAP_FOWNER",
+		"CAP_MKNOD",
+		"CAP_NET_RAW",
+		"CAP_SETGID",
+		"CAP_SETUID",
+		"CAP_SETFCAP",
+		"CAP_SETPCAP",
+		"CAP_NET_BIND_SERVICE",
+		"CAP_SYS_CHROOT",
+		"CAP_KILL",
+		"CAP_AUDIT_WRITE",
+	},
+	Namespaces: configs.Namespaces([]configs.Namespace{
+		{Type: configs.NEWNS},
+		{Type: configs.NEWUTS},
+		{Type: configs.NEWIPC},
+		{Type: configs.NEWPID},
+		{Type: configs.NEWUSER},
+		{Type: configs.NEWNET},
+	}),
+	Cgroups: &configs.Cgroup{
+		Name:   "test-container",
+		Parent: "system",
+		Resources: &configs.Resources{
+			MemorySwappiness: nil,
+			AllowAllDevices:  nil,
+			AllowedDevices:   configs.DefaultAllowedDevices,
+		},
+	},
+	MaskPaths: []string{
+		"/proc/kcore",
+		"/sys/firmware",
+	},
+	ReadonlyPaths: []string{
+		"/proc/sys", "/proc/sysrq-trigger", "/proc/irq", "/proc/bus",
+	},
+	Devices:  configs.DefaultAutoCreatedDevices,
+	Hostname: "testing",
+	Mounts: []*configs.Mount{
+		{
+			Source:      "proc",
+			Destination: "/proc",
+			Device:      "proc",
+			Flags:       defaultMountFlags,
+		},
+		{
+			Source:      "tmpfs",
+			Destination: "/dev",
+			Device:      "tmpfs",
+			Flags:       syscall.MS_NOSUID | syscall.MS_STRICTATIME,
+			Data:        "mode=755",
+		},
+		{
+			Source:      "devpts",
+			Destination: "/dev/pts",
+			Device:      "devpts",
+			Flags:       syscall.MS_NOSUID | syscall.MS_NOEXEC,
+			Data:        "newinstance,ptmxmode=0666,mode=0620,gid=5",
+		},
+		{
+			Device:      "tmpfs",
+			Source:      "shm",
+			Destination: "/dev/shm",
+			Data:        "mode=1777,size=65536k",
+			Flags:       defaultMountFlags,
+		},
+		{
+			Source:      "mqueue",
+			Destination: "/dev/mqueue",
+			Device:      "mqueue",
+			Flags:       defaultMountFlags,
+		},
+		{
+			Source:      "sysfs",
+			Destination: "/sys",
+			Device:      "sysfs",
+			Flags:       defaultMountFlags | syscall.MS_RDONLY,
+		},
+	},
+	UidMappings: []configs.IDMap{
+		{
+			ContainerID: 0,
+			HostID: 1000,
+			Size: 65536,
+		},
+	},
+	GidMappings: []configs.IDMap{
+		{
+			ContainerID: 0,
+			HostID: 1000,
+			Size: 65536,
+		},
+	},
+	Networks: []*configs.Network{
+		{
+			Type:    "loopback",
+			Address: "127.0.0.1/0",
+			Gateway: "localhost",
+		},
+	},
+	Rlimits: []configs.Rlimit{
+		{
+			Type: syscall.RLIMIT_NOFILE,
+			Hard: uint64(1025),
+			Soft: uint64(1025),
+		},
+	},
+}
+```
+
+Once you have the configuration populated you can create a container:
+
+```go
+container, err := factory.Create("container-id", config)
+if err != nil {
+	logrus.Fatal(err)
+	return
+}
+```
+
+To spawn bash as the initial process inside the container and have the
+processes pid returned in order to wait, signal, or kill the process:
+
+```go
+process := &libcontainer.Process{
+	Args:   []string{"/bin/bash"},
+	Env:    []string{"PATH=/bin"},
+	User:   "daemon",
+	Stdin:  os.Stdin,
+	Stdout: os.Stdout,
+	Stderr: os.Stderr,
+}
+
+err := container.Run(process)
+if err != nil {
+	container.Destroy()
+	logrus.Fatal(err)
+	return
+}
+
+// wait for the process to finish.
+_, err := process.Wait()
+if err != nil {
+	logrus.Fatal(err)
+}
+
+// destroy the container.
+container.Destroy()
+```
+
+Additional ways to interact with a running container are:
+
+```go
+// return all the pids for all processes running inside the container.
+processes, err := container.Processes()
+
+// get detailed cpu, memory, io, and network statistics for the container and
+// it's processes.
+stats, err := container.Stats()
+
+// pause all processes inside the container.
+container.Pause()
+
+// resume all paused processes.
+container.Resume()
+
+// send signal to container's init process.
+container.Signal(signal)
+
+// update container resource constraints.
+container.Set(config)
+
+// get current status of the container.
+status, err := container.Status()
+
+// get current container's state information.
+state, err := container.State()
+```
+
+
+#### Checkpoint & Restore
+
+libcontainer now integrates [CRIU](http://criu.org/) for checkpointing and restoring containers.
+This let's you save the state of a process running inside a container to disk, and then restore
+that state into a new process, on the same machine or on another machine.
+
+`criu` version 1.5.2 or higher is required to use checkpoint and restore.
+If you don't already  have `criu` installed, you can build it from source, following the
+[online instructions](http://criu.org/Installation). `criu` is also installed in the docker image
+generated when building libcontainer with docker.
+
+
+## Copyright and license
+
+Code and documentation copyright 2014 Docker, inc. Code released under the Apache 2.0 license.
+Docs released under Creative commons.
+

vendor/github.com/opencontainers/runc/libcontainer/SPEC.md

@@ -0,0 +1,334 @@
+## Container Specification - v1
+
+This is the standard configuration for version 1 containers.  It includes
+namespaces, standard filesystem setup, a default Linux capability set, and
+information about resource reservations.  It also has information about any 
+populated environment settings for the processes running inside a container.
+
+Along with the configuration of how a container is created the standard also
+discusses actions that can be performed on a container to manage and inspect
+information about the processes running inside.
+
+The v1 profile is meant to be able to accommodate the majority of applications
+with a strong security configuration.
+
+### System Requirements and Compatibility
+
+Minimum requirements:
+* Kernel version - 3.10 recommended 2.6.2x minimum(with backported patches)
+* Mounted cgroups with each subsystem in its own hierarchy
+
+
+### Namespaces
+
+|     Flag      | Enabled | 
+| ------------  | ------- |
+| CLONE_NEWPID  |    1    |
+| CLONE_NEWUTS  |    1    |
+| CLONE_NEWIPC  |    1    |
+| CLONE_NEWNET  |    1    |
+| CLONE_NEWNS   |    1    |
+| CLONE_NEWUSER |    1    |
+
+Namespaces are created for the container via the `clone` syscall.  
+
+
+### Filesystem
+
+A root filesystem must be provided to a container for execution.  The container
+will use this root filesystem (rootfs) to jail and spawn processes inside where
+the binaries and system libraries are local to that directory.  Any binaries
+to be executed must be contained within this rootfs.
+
+Mounts that happen inside the container are automatically cleaned up when the
+container exits as the mount namespace is destroyed and the kernel will 
+unmount all the mounts that were setup within that namespace.
+
+For a container to execute properly there are certain filesystems that 
+are required to be mounted within the rootfs that the runtime will setup.
+
+|     Path    |  Type  |                  Flags                 |                 Data                     |
+| ----------- | ------ | -------------------------------------- | ---------------------------------------- |
+| /proc       | proc   | MS_NOEXEC,MS_NOSUID,MS_NODEV           |                                          |
+| /dev        | tmpfs  | MS_NOEXEC,MS_STRICTATIME               | mode=755                                 |
+| /dev/shm    | tmpfs  | MS_NOEXEC,MS_NOSUID,MS_NODEV           | mode=1777,size=65536k                    |
+| /dev/mqueue | mqueue | MS_NOEXEC,MS_NOSUID,MS_NODEV           |                                          |
+| /dev/pts    | devpts | MS_NOEXEC,MS_NOSUID                    | newinstance,ptmxmode=0666,mode=620,gid=5 |
+| /sys        | sysfs  | MS_NOEXEC,MS_NOSUID,MS_NODEV,MS_RDONLY |                                          |
+
+
+After a container's filesystems are mounted within the newly created 
+mount namespace `/dev` will need to be populated with a set of device nodes.
+It is expected that a rootfs does not need to have any device nodes specified
+for `/dev` within the rootfs as the container will setup the correct devices
+that are required for executing a container's process.
+
+|      Path    | Mode |   Access   |
+| ------------ | ---- | ---------- |
+| /dev/null    | 0666 |  rwm       |
+| /dev/zero    | 0666 |  rwm       |
+| /dev/full    | 0666 |  rwm       |
+| /dev/tty     | 0666 |  rwm       |
+| /dev/random  | 0666 |  rwm       |
+| /dev/urandom | 0666 |  rwm       |
+
+
+**ptmx**
+`/dev/ptmx` will need to be a symlink to the host's `/dev/ptmx` within
+the container.  
+
+The use of a pseudo TTY is optional within a container and it should support both.
+If a pseudo is provided to the container `/dev/console` will need to be 
+setup by binding the console in `/dev/` after it has been populated and mounted
+in tmpfs.
+
+|      Source     | Destination  | UID GID | Mode | Type |
+| --------------- | ------------ | ------- | ---- | ---- |
+| *pty host path* | /dev/console | 0 0     | 0600 | bind | 
+
+
+After `/dev/null` has been setup we check for any external links between
+the container's io, STDIN, STDOUT, STDERR.  If the container's io is pointing
+to `/dev/null` outside the container we close and `dup2` the `/dev/null` 
+that is local to the container's rootfs.
+
+
+After the container has `/proc` mounted a few standard symlinks are setup 
+within `/dev/` for the io.
+
+|    Source       | Destination |
+| --------------- | ----------- |
+| /proc/self/fd   | /dev/fd     |
+| /proc/self/fd/0 | /dev/stdin  |
+| /proc/self/fd/1 | /dev/stdout |
+| /proc/self/fd/2 | /dev/stderr |
+
+A `pivot_root` is used to change the root for the process, effectively 
+jailing the process inside the rootfs.
+
+```c
+put_old = mkdir(...);
+pivot_root(rootfs, put_old);
+chdir("/");
+unmount(put_old, MS_DETACH);
+rmdir(put_old);
+```
+
+For container's running with a rootfs inside `ramfs` a `MS_MOVE` combined
+with a `chroot` is required as `pivot_root` is not supported in `ramfs`.
+
+```c
+mount(rootfs, "/", NULL, MS_MOVE, NULL);
+chroot(".");
+chdir("/");
+```
+
+The `umask` is set back to `0022` after the filesystem setup has been completed.
+
+### Resources
+
+Cgroups are used to handle resource allocation for containers.  This includes
+system resources like cpu, memory, and device access.
+
+| Subsystem  | Enabled |
+| ---------- | ------- |
+| devices    | 1       |
+| memory     | 1       |
+| cpu        | 1       |
+| cpuacct    | 1       |
+| cpuset     | 1       |
+| blkio      | 1       |
+| perf_event | 1       |
+| freezer    | 1       |
+| hugetlb    | 1       |
+| pids       | 1       |
+
+
+All cgroup subsystem are joined so that statistics can be collected from
+each of the subsystems.  Freezer does not expose any stats but is joined
+so that containers can be paused and resumed.
+
+The parent process of the container's init must place the init pid inside
+the correct cgroups before the initialization begins.  This is done so
+that no processes or threads escape the cgroups.  This sync is 
+done via a pipe ( specified in the runtime section below ) that the container's
+init process will block waiting for the parent to finish setup.
+
+### Security 
+
+The standard set of Linux capabilities that are set in a container
+provide a good default for security and flexibility for the applications.
+
+
+|     Capability       | Enabled |
+| -------------------- | ------- |
+| CAP_NET_RAW          | 1       |
+| CAP_NET_BIND_SERVICE | 1       |
+| CAP_AUDIT_READ       | 1       |
+| CAP_AUDIT_WRITE      | 1       |
+| CAP_DAC_OVERRIDE     | 1       |
+| CAP_SETFCAP          | 1       |
+| CAP_SETPCAP          | 1       |
+| CAP_SETGID           | 1       |
+| CAP_SETUID           | 1       |
+| CAP_MKNOD            | 1       |
+| CAP_CHOWN            | 1       |
+| CAP_FOWNER           | 1       |
+| CAP_FSETID           | 1       |
+| CAP_KILL             | 1       |
+| CAP_SYS_CHROOT       | 1       |
+| CAP_NET_BROADCAST    | 0       |
+| CAP_SYS_MODULE       | 0       |
+| CAP_SYS_RAWIO        | 0       |
+| CAP_SYS_PACCT        | 0       |
+| CAP_SYS_ADMIN        | 0       |
+| CAP_SYS_NICE         | 0       |
+| CAP_SYS_RESOURCE     | 0       |
+| CAP_SYS_TIME         | 0       |
+| CAP_SYS_TTY_CONFIG   | 0       |
+| CAP_AUDIT_CONTROL    | 0       |
+| CAP_MAC_OVERRIDE     | 0       |
+| CAP_MAC_ADMIN        | 0       |
+| CAP_NET_ADMIN        | 0       |
+| CAP_SYSLOG           | 0       |
+| CAP_DAC_READ_SEARCH  | 0       |
+| CAP_LINUX_IMMUTABLE  | 0       |
+| CAP_IPC_LOCK         | 0       |
+| CAP_IPC_OWNER        | 0       |
+| CAP_SYS_PTRACE       | 0       |
+| CAP_SYS_BOOT         | 0       |
+| CAP_LEASE            | 0       |
+| CAP_WAKE_ALARM       | 0       |
+| CAP_BLOCK_SUSPEND    | 0       |
+
+
+Additional security layers like [apparmor](https://wiki.ubuntu.com/AppArmor)
+and [selinux](http://selinuxproject.org/page/Main_Page) can be used with
+the containers.  A container should support setting an apparmor profile or 
+selinux process and mount labels if provided in the configuration.  
+
+Standard apparmor profile:
+```c
+#include <tunables/global>
+profile <profile_name> flags=(attach_disconnected,mediate_deleted) {
+  #include <abstractions/base>
+  network,
+  capability,
+  file,
+  umount,
+
+  deny @{PROC}/sys/fs/** wklx,
+  deny @{PROC}/sysrq-trigger rwklx,
+  deny @{PROC}/mem rwklx,
+  deny @{PROC}/kmem rwklx,
+  deny @{PROC}/sys/kernel/[^s][^h][^m]* wklx,
+  deny @{PROC}/sys/kernel/*/** wklx,
+
+  deny mount,
+
+  deny /sys/[^f]*/** wklx,
+  deny /sys/f[^s]*/** wklx,
+  deny /sys/fs/[^c]*/** wklx,
+  deny /sys/fs/c[^g]*/** wklx,
+  deny /sys/fs/cg[^r]*/** wklx,
+  deny /sys/firmware/efi/efivars/** rwklx,
+  deny /sys/kernel/security/** rwklx,
+}
+```
+
+*TODO: seccomp work is being done to find a good default config*
+
+### Runtime and Init Process
+
+During container creation the parent process needs to talk to the container's init 
+process and have a form of synchronization.  This is accomplished by creating
+a pipe that is passed to the container's init.  When the init process first spawns 
+it will block on its side of the pipe until the parent closes its side.  This
+allows the parent to have time to set the new process inside a cgroup hierarchy 
+and/or write any uid/gid mappings required for user namespaces.  
+The pipe is passed to the init process via FD 3.
+
+The application consuming libcontainer should be compiled statically.  libcontainer
+does not define any init process and the arguments provided are used to `exec` the
+process inside the application.  There should be no long running init within the 
+container spec.
+
+If a pseudo tty is provided to a container it will open and `dup2` the console
+as the container's STDIN, STDOUT, STDERR as well as mounting the console
+as `/dev/console`.
+
+An extra set of mounts are provided to a container and setup for use.  A container's
+rootfs can contain some non portable files inside that can cause side effects during
+execution of a process.  These files are usually created and populated with the container
+specific information via the runtime.  
+
+**Extra runtime files:**
+* /etc/hosts 
+* /etc/resolv.conf
+* /etc/hostname
+* /etc/localtime
+
+
+#### Defaults
+
+There are a few defaults that can be overridden by users, but in their omission
+these apply to processes within a container.
+
+|       Type          |             Value              |
+| ------------------- | ------------------------------ |
+| Parent Death Signal | SIGKILL                        | 
+| UID                 | 0                              |
+| GID                 | 0                              |
+| GROUPS              | 0, NULL                        |
+| CWD                 | "/"                            |
+| $HOME               | Current user's home dir or "/" |
+| Readonly rootfs     | false                          |
+| Pseudo TTY          | false                          |
+
+
+## Actions
+
+After a container is created there is a standard set of actions that can
+be done to the container.  These actions are part of the public API for 
+a container.
+
+|     Action     |                         Description                                |
+| -------------- | ------------------------------------------------------------------ |
+| Get processes  | Return all the pids for processes running inside a container       | 
+| Get Stats      | Return resource statistics for the container as a whole            |
+| Wait           | Waits on the container's init process ( pid 1 )                    |
+| Wait Process   | Wait on any of the container's processes returning the exit status | 
+| Destroy        | Kill the container's init process and remove any filesystem state  |
+| Signal         | Send a signal to the container's init process                      |
+| Signal Process | Send a signal to any of the container's processes                  |
+| Pause          | Pause all processes inside the container                           |
+| Resume         | Resume all processes inside the container if paused                |
+| Exec           | Execute a new process inside of the container  ( requires setns )  |
+| Set            | Setup configs of the container after it's created                  |
+
+### Execute a new process inside of a running container.
+
+User can execute a new process inside of a running container. Any binaries to be
+executed must be accessible within the container's rootfs.
+
+The started process will run inside the container's rootfs. Any changes
+made by the process to the container's filesystem will persist after the
+process finished executing.
+
+The started process will join all the container's existing namespaces. When the
+container is paused, the process will also be paused and will resume when
+the container is unpaused.  The started process will only run when the container's
+primary process (PID 1) is running, and will not be restarted when the container
+is restarted.
+
+#### Planned additions
+
+The started process will have its own cgroups nested inside the container's
+cgroups. This is used for process tracking and optionally resource allocation
+handling for the new process. Freezer cgroup is required, the rest of the cgroups
+are optional. The process executor must place its pid inside the correct
+cgroups before starting the process. This is done so that no child processes or
+threads can escape the cgroups.
+
+When the process is stopped, the process executor will try (in a best-effort way)
+to stop all its children and remove the sub-cgroups.

vendor/github.com/opencontainers/runc/libcontainer/apparmor/apparmor.go

@@ -0,0 +1,39 @@
+// +build apparmor,linux
+
+package apparmor
+
+// #cgo LDFLAGS: -lapparmor
+// #include <sys/apparmor.h>
+// #include <stdlib.h>
+import "C"
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"unsafe"
+)
+
+// IsEnabled returns true if apparmor is enabled for the host.
+func IsEnabled() bool {
+	if _, err := os.Stat("/sys/kernel/security/apparmor"); err == nil && os.Getenv("container") == "" {
+		if _, err = os.Stat("/sbin/apparmor_parser"); err == nil {
+			buf, err := ioutil.ReadFile("/sys/module/apparmor/parameters/enabled")
+			return err == nil && len(buf) > 1 && buf[0] == 'Y'
+		}
+	}
+	return false
+}
+
+// ApplyProfile will apply the profile with the specified name to the process after
+// the next exec.
+func ApplyProfile(name string) error {
+	if name == "" {
+		return nil
+	}
+	cName := C.CString(name)
+	defer C.free(unsafe.Pointer(cName))
+	if _, err := C.aa_change_onexec(cName); err != nil {
+		return fmt.Errorf("apparmor failed to apply profile: %s", err)
+	}
+	return nil
+}

vendor/github.com/opencontainers/runc/libcontainer/apparmor/apparmor_disabled.go

@@ -0,0 +1,20 @@
+// +build !apparmor !linux
+
+package apparmor
+
+import (
+	"errors"
+)
+
+var ErrApparmorNotEnabled = errors.New("apparmor: config provided but apparmor not supported")
+
+func IsEnabled() bool {
+	return false
+}
+
+func ApplyProfile(name string) error {
+	if name != "" {
+		return ErrApparmorNotEnabled
+	}
+	return nil
+}

vendor/github.com/opencontainers/runc/libcontainer/capabilities_ambient.go

@@ -0,0 +1,7 @@
+// +build linux,ambient
+
+package libcontainer
+
+import "github.com/syndtr/gocapability/capability"
+
+const allCapabilityTypes = capability.CAPS | capability.BOUNDS | capability.AMBS

vendor/github.com/opencontainers/runc/libcontainer/capabilities_linux.go

@@ -0,0 +1,67 @@
+// +build linux
+
+package libcontainer
+
+import (
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/syndtr/gocapability/capability"
+)
+
+var capabilityMap map[string]capability.Cap
+
+func init() {
+	capabilityMap = make(map[string]capability.Cap)
+	last := capability.CAP_LAST_CAP
+	// workaround for RHEL6 which has no /proc/sys/kernel/cap_last_cap
+	if last == capability.Cap(63) {
+		last = capability.CAP_BLOCK_SUSPEND
+	}
+	for _, cap := range capability.List() {
+		if cap > last {
+			continue
+		}
+		capKey := fmt.Sprintf("CAP_%s", strings.ToUpper(cap.String()))
+		capabilityMap[capKey] = cap
+	}
+}
+
+func newCapWhitelist(caps []string) (*whitelist, error) {
+	l := []capability.Cap{}
+	for _, c := range caps {
+		v, ok := capabilityMap[c]
+		if !ok {
+			return nil, fmt.Errorf("unknown capability %q", c)
+		}
+		l = append(l, v)
+	}
+	pid, err := capability.NewPid(os.Getpid())
+	if err != nil {
+		return nil, err
+	}
+	return &whitelist{
+		keep: l,
+		pid:  pid,
+	}, nil
+}
+
+type whitelist struct {
+	pid  capability.Capabilities
+	keep []capability.Cap
+}
+
+// dropBoundingSet drops the capability bounding set to those specified in the whitelist.
+func (w *whitelist) dropBoundingSet() error {
+	w.pid.Clear(capability.BOUNDS)
+	w.pid.Set(capability.BOUNDS, w.keep...)
+	return w.pid.Apply(capability.BOUNDS)
+}
+
+// drop drops all capabilities for the current process except those specified in the whitelist.
+func (w *whitelist) drop() error {
+	w.pid.Clear(allCapabilityTypes)
+	w.pid.Set(allCapabilityTypes, w.keep...)
+	return w.pid.Apply(allCapabilityTypes)
+}

vendor/github.com/opencontainers/runc/libcontainer/capabilities_noambient.go

@@ -0,0 +1,7 @@
+// +build !ambient,linux
+
+package libcontainer
+
+import "github.com/syndtr/gocapability/capability"
+
+const allCapabilityTypes = capability.CAPS | capability.BOUNDS

vendor/github.com/opencontainers/runc/libcontainer/cgroups/cgroups.go

@@ -0,0 +1,64 @@
+// +build linux
+
+package cgroups
+
+import (
+	"fmt"
+
+	"github.com/opencontainers/runc/libcontainer/configs"
+)
+
+type Manager interface {
+	// Applies cgroup configuration to the process with the specified pid
+	Apply(pid int) error
+
+	// Returns the PIDs inside the cgroup set
+	GetPids() ([]int, error)
+
+	// Returns the PIDs inside the cgroup set & all sub-cgroups
+	GetAllPids() ([]int, error)
+
+	// Returns statistics for the cgroup set
+	GetStats() (*Stats, error)
+
+	// Toggles the freezer cgroup according with specified state
+	Freeze(state configs.FreezerState) error
+
+	// Destroys the cgroup set
+	Destroy() error
+
+	// NewCgroupManager() and LoadCgroupManager() require following attributes:
+	// 	Paths   map[string]string
+	// 	Cgroups *cgroups.Cgroup
+	// Paths maps cgroup subsystem to path at which it is mounted.
+	// Cgroups specifies specific cgroup settings for the various subsystems
+
+	// Returns cgroup paths to save in a state file and to be able to
+	// restore the object later.
+	GetPaths() map[string]string
+
+	// Sets the cgroup as configured.
+	Set(container *configs.Config) error
+}
+
+type NotFoundError struct {
+	Subsystem string
+}
+
+func (e *NotFoundError) Error() string {
+	return fmt.Sprintf("mountpoint for %s not found", e.Subsystem)
+}
+
+func NewNotFoundError(sub string) error {
+	return &NotFoundError{
+		Subsystem: sub,
+	}
+}
+
+func IsNotFound(err error) bool {
+	if err == nil {
+		return false
+	}
+	_, ok := err.(*NotFoundError)
+	return ok
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/cgroups_test.go

@@ -0,0 +1,18 @@
+// +build linux
+
+package cgroups
+
+import (
+	"testing"
+)
+
+func TestParseCgroups(t *testing.T) {
+	cgroups, err := ParseCgroupFile("/proc/self/cgroup")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if _, ok := cgroups["cpu"]; !ok {
+		t.Fail()
+	}
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/cgroups_unsupported.go

@@ -0,0 +1,3 @@
+// +build !linux
+
+package cgroups

vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/apply_raw.go

@@ -0,0 +1,376 @@
+// +build linux
+
+package fs
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"sync"
+
+	"github.com/opencontainers/runc/libcontainer/cgroups"
+	"github.com/opencontainers/runc/libcontainer/configs"
+	libcontainerUtils "github.com/opencontainers/runc/libcontainer/utils"
+)
+
+var (
+	subsystems = subsystemSet{
+		&CpusetGroup{},
+		&DevicesGroup{},
+		&MemoryGroup{},
+		&CpuGroup{},
+		&CpuacctGroup{},
+		&PidsGroup{},
+		&BlkioGroup{},
+		&HugetlbGroup{},
+		&NetClsGroup{},
+		&NetPrioGroup{},
+		&PerfEventGroup{},
+		&FreezerGroup{},
+		&NameGroup{GroupName: "name=systemd", Join: true},
+	}
+	HugePageSizes, _ = cgroups.GetHugePageSize()
+)
+
+var errSubsystemDoesNotExist = errors.New("cgroup: subsystem does not exist")
+
+type subsystemSet []subsystem
+
+func (s subsystemSet) Get(name string) (subsystem, error) {
+	for _, ss := range s {
+		if ss.Name() == name {
+			return ss, nil
+		}
+	}
+	return nil, errSubsystemDoesNotExist
+}
+
+type subsystem interface {
+	// Name returns the name of the subsystem.
+	Name() string
+	// Returns the stats, as 'stats', corresponding to the cgroup under 'path'.
+	GetStats(path string, stats *cgroups.Stats) error
+	// Removes the cgroup represented by 'cgroupData'.
+	Remove(*cgroupData) error
+	// Creates and joins the cgroup represented by 'cgroupData'.
+	Apply(*cgroupData) error
+	// Set the cgroup represented by cgroup.
+	Set(path string, cgroup *configs.Cgroup) error
+}
+
+type Manager struct {
+	mu      sync.Mutex
+	Cgroups *configs.Cgroup
+	Paths   map[string]string
+}
+
+// The absolute path to the root of the cgroup hierarchies.
+var cgroupRootLock sync.Mutex
+var cgroupRoot string
+
+// Gets the cgroupRoot.
+func getCgroupRoot() (string, error) {
+	cgroupRootLock.Lock()
+	defer cgroupRootLock.Unlock()
+
+	if cgroupRoot != "" {
+		return cgroupRoot, nil
+	}
+
+	root, err := cgroups.FindCgroupMountpointDir()
+	if err != nil {
+		return "", err
+	}
+
+	if _, err := os.Stat(root); err != nil {
+		return "", err
+	}
+
+	cgroupRoot = root
+	return cgroupRoot, nil
+}
+
+type cgroupData struct {
+	root      string
+	innerPath string
+	config    *configs.Cgroup
+	pid       int
+}
+
+func (m *Manager) Apply(pid int) (err error) {
+	if m.Cgroups == nil {
+		return nil
+	}
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	var c = m.Cgroups
+
+	d, err := getCgroupData(m.Cgroups, pid)
+	if err != nil {
+		return err
+	}
+
+	if c.Paths != nil {
+		paths := make(map[string]string)
+		for name, path := range c.Paths {
+			_, err := d.path(name)
+			if err != nil {
+				if cgroups.IsNotFound(err) {
+					continue
+				}
+				return err
+			}
+			paths[name] = path
+		}
+		m.Paths = paths
+		return cgroups.EnterPid(m.Paths, pid)
+	}
+
+	paths := make(map[string]string)
+	for _, sys := range subsystems {
+		if err := sys.Apply(d); err != nil {
+			return err
+		}
+		// TODO: Apply should, ideally, be reentrant or be broken up into a separate
+		// create and join phase so that the cgroup hierarchy for a container can be
+		// created then join consists of writing the process pids to cgroup.procs
+		p, err := d.path(sys.Name())
+		if err != nil {
+			// The non-presence of the devices subsystem is
+			// considered fatal for security reasons.
+			if cgroups.IsNotFound(err) && sys.Name() != "devices" {
+				continue
+			}
+			return err
+		}
+		paths[sys.Name()] = p
+	}
+	m.Paths = paths
+	return nil
+}
+
+func (m *Manager) Destroy() error {
+	if m.Cgroups.Paths != nil {
+		return nil
+	}
+	m.mu.Lock()
+	defer m.mu.Unlock()
+	if err := cgroups.RemovePaths(m.Paths); err != nil {
+		return err
+	}
+	m.Paths = make(map[string]string)
+	return nil
+}
+
+func (m *Manager) GetPaths() map[string]string {
+	m.mu.Lock()
+	paths := m.Paths
+	m.mu.Unlock()
+	return paths
+}
+
+func (m *Manager) GetStats() (*cgroups.Stats, error) {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+	stats := cgroups.NewStats()
+	for name, path := range m.Paths {
+		sys, err := subsystems.Get(name)
+		if err == errSubsystemDoesNotExist || !cgroups.PathExists(path) {
+			continue
+		}
+		if err := sys.GetStats(path, stats); err != nil {
+			return nil, err
+		}
+	}
+	return stats, nil
+}
+
+func (m *Manager) Set(container *configs.Config) error {
+	// If Paths are set, then we are just joining cgroups paths
+	// and there is no need to set any values.
+	if m.Cgroups.Paths != nil {
+		return nil
+	}
+
+	paths := m.GetPaths()
+	for _, sys := range subsystems {
+		path := paths[sys.Name()]
+		if err := sys.Set(path, container.Cgroups); err != nil {
+			return err
+		}
+	}
+
+	if m.Paths["cpu"] != "" {
+		if err := CheckCpushares(m.Paths["cpu"], container.Cgroups.Resources.CpuShares); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// Freeze toggles the container's freezer cgroup depending on the state
+// provided
+func (m *Manager) Freeze(state configs.FreezerState) error {
+	paths := m.GetPaths()
+	dir := paths["freezer"]
+	prevState := m.Cgroups.Resources.Freezer
+	m.Cgroups.Resources.Freezer = state
+	freezer, err := subsystems.Get("freezer")
+	if err != nil {
+		return err
+	}
+	err = freezer.Set(dir, m.Cgroups)
+	if err != nil {
+		m.Cgroups.Resources.Freezer = prevState
+		return err
+	}
+	return nil
+}
+
+func (m *Manager) GetPids() ([]int, error) {
+	paths := m.GetPaths()
+	return cgroups.GetPids(paths["devices"])
+}
+
+func (m *Manager) GetAllPids() ([]int, error) {
+	paths := m.GetPaths()
+	return cgroups.GetAllPids(paths["devices"])
+}
+
+func getCgroupData(c *configs.Cgroup, pid int) (*cgroupData, error) {
+	root, err := getCgroupRoot()
+	if err != nil {
+		return nil, err
+	}
+
+	if (c.Name != "" || c.Parent != "") && c.Path != "" {
+		return nil, fmt.Errorf("cgroup: either Path or Name and Parent should be used")
+	}
+
+	// XXX: Do not remove this code. Path safety is important! -- cyphar
+	cgPath := libcontainerUtils.CleanPath(c.Path)
+	cgParent := libcontainerUtils.CleanPath(c.Parent)
+	cgName := libcontainerUtils.CleanPath(c.Name)
+
+	innerPath := cgPath
+	if innerPath == "" {
+		innerPath = filepath.Join(cgParent, cgName)
+	}
+
+	return &cgroupData{
+		root:      root,
+		innerPath: innerPath,
+		config:    c,
+		pid:       pid,
+	}, nil
+}
+
+func (raw *cgroupData) parentPath(subsystem, mountpoint, root string) (string, error) {
+	// Use GetThisCgroupDir instead of GetInitCgroupDir, because the creating
+	// process could in container and shared pid namespace with host, and
+	// /proc/1/cgroup could point to whole other world of cgroups.
+	initPath, err := cgroups.GetThisCgroupDir(subsystem)
+	if err != nil {
+		return "", err
+	}
+	// This is needed for nested containers, because in /proc/self/cgroup we
+	// see pathes from host, which don't exist in container.
+	relDir, err := filepath.Rel(root, initPath)
+	if err != nil {
+		return "", err
+	}
+	return filepath.Join(mountpoint, relDir), nil
+}
+
+func (raw *cgroupData) path(subsystem string) (string, error) {
+	mnt, root, err := cgroups.FindCgroupMountpointAndRoot(subsystem)
+	// If we didn't mount the subsystem, there is no point we make the path.
+	if err != nil {
+		return "", err
+	}
+
+	// If the cgroup name/path is absolute do not look relative to the cgroup of the init process.
+	if filepath.IsAbs(raw.innerPath) {
+		// Sometimes subsystems can be mounted together as 'cpu,cpuacct'.
+		return filepath.Join(raw.root, filepath.Base(mnt), raw.innerPath), nil
+	}
+
+	parentPath, err := raw.parentPath(subsystem, mnt, root)
+	if err != nil {
+		return "", err
+	}
+
+	return filepath.Join(parentPath, raw.innerPath), nil
+}
+
+func (raw *cgroupData) join(subsystem string) (string, error) {
+	path, err := raw.path(subsystem)
+	if err != nil {
+		return "", err
+	}
+	if err := os.MkdirAll(path, 0755); err != nil {
+		return "", err
+	}
+	if err := cgroups.WriteCgroupProc(path, raw.pid); err != nil {
+		return "", err
+	}
+	return path, nil
+}
+
+func writeFile(dir, file, data string) error {
+	// Normally dir should not be empty, one case is that cgroup subsystem
+	// is not mounted, we will get empty dir, and we want it fail here.
+	if dir == "" {
+		return fmt.Errorf("no such directory for %s", file)
+	}
+	if err := ioutil.WriteFile(filepath.Join(dir, file), []byte(data), 0700); err != nil {
+		return fmt.Errorf("failed to write %v to %v: %v", data, file, err)
+	}
+	return nil
+}
+
+func readFile(dir, file string) (string, error) {
+	data, err := ioutil.ReadFile(filepath.Join(dir, file))
+	return string(data), err
+}
+
+func removePath(p string, err error) error {
+	if err != nil {
+		return err
+	}
+	if p != "" {
+		return os.RemoveAll(p)
+	}
+	return nil
+}
+
+func CheckCpushares(path string, c int64) error {
+	var cpuShares int64
+
+	if c == 0 {
+		return nil
+	}
+
+	fd, err := os.Open(filepath.Join(path, "cpu.shares"))
+	if err != nil {
+		return err
+	}
+	defer fd.Close()
+
+	_, err = fmt.Fscanf(fd, "%d", &cpuShares)
+	if err != nil && err != io.EOF {
+		return err
+	}
+
+	if c > cpuShares {
+		return fmt.Errorf("The maximum allowed cpu-shares is %d", cpuShares)
+	} else if c < cpuShares {
+		return fmt.Errorf("The minimum allowed cpu-shares is %d", cpuShares)
+	}
+
+	return nil
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/apply_raw_test.go

@@ -0,0 +1,272 @@
+// +build linux
+
+package fs
+
+import (
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"github.com/opencontainers/runc/libcontainer/configs"
+)
+
+func TestInvalidCgroupPath(t *testing.T) {
+	root, err := getCgroupRoot()
+	if err != nil {
+		t.Errorf("couldn't get cgroup root: %v", err)
+	}
+
+	config := &configs.Cgroup{
+		Path: "../../../../../../../../../../some/path",
+	}
+
+	data, err := getCgroupData(config, 0)
+	if err != nil {
+		t.Errorf("couldn't get cgroup data: %v", err)
+	}
+
+	// Make sure the final innerPath doesn't go outside the cgroup mountpoint.
+	if strings.HasPrefix(data.innerPath, "..") {
+		t.Errorf("SECURITY: cgroup innerPath is outside cgroup mountpoint!")
+	}
+
+	// Double-check, using an actual cgroup.
+	deviceRoot := filepath.Join(root, "devices")
+	devicePath, err := data.path("devices")
+	if err != nil {
+		t.Errorf("couldn't get cgroup path: %v", err)
+	}
+	if !strings.HasPrefix(devicePath, deviceRoot) {
+		t.Errorf("SECURITY: cgroup path() is outside cgroup mountpoint!")
+	}
+}
+
+func TestInvalidAbsoluteCgroupPath(t *testing.T) {
+	root, err := getCgroupRoot()
+	if err != nil {
+		t.Errorf("couldn't get cgroup root: %v", err)
+	}
+
+	config := &configs.Cgroup{
+		Path: "/../../../../../../../../../../some/path",
+	}
+
+	data, err := getCgroupData(config, 0)
+	if err != nil {
+		t.Errorf("couldn't get cgroup data: %v", err)
+	}
+
+	// Make sure the final innerPath doesn't go outside the cgroup mountpoint.
+	if strings.HasPrefix(data.innerPath, "..") {
+		t.Errorf("SECURITY: cgroup innerPath is outside cgroup mountpoint!")
+	}
+
+	// Double-check, using an actual cgroup.
+	deviceRoot := filepath.Join(root, "devices")
+	devicePath, err := data.path("devices")
+	if err != nil {
+		t.Errorf("couldn't get cgroup path: %v", err)
+	}
+	if !strings.HasPrefix(devicePath, deviceRoot) {
+		t.Errorf("SECURITY: cgroup path() is outside cgroup mountpoint!")
+	}
+}
+
+// XXX: Remove me after we get rid of configs.Cgroup.Name and configs.Cgroup.Parent.
+func TestInvalidCgroupParent(t *testing.T) {
+	root, err := getCgroupRoot()
+	if err != nil {
+		t.Errorf("couldn't get cgroup root: %v", err)
+	}
+
+	config := &configs.Cgroup{
+		Parent: "../../../../../../../../../../some/path",
+		Name:   "name",
+	}
+
+	data, err := getCgroupData(config, 0)
+	if err != nil {
+		t.Errorf("couldn't get cgroup data: %v", err)
+	}
+
+	// Make sure the final innerPath doesn't go outside the cgroup mountpoint.
+	if strings.HasPrefix(data.innerPath, "..") {
+		t.Errorf("SECURITY: cgroup innerPath is outside cgroup mountpoint!")
+	}
+
+	// Double-check, using an actual cgroup.
+	deviceRoot := filepath.Join(root, "devices")
+	devicePath, err := data.path("devices")
+	if err != nil {
+		t.Errorf("couldn't get cgroup path: %v", err)
+	}
+	if !strings.HasPrefix(devicePath, deviceRoot) {
+		t.Errorf("SECURITY: cgroup path() is outside cgroup mountpoint!")
+	}
+}
+
+// XXX: Remove me after we get rid of configs.Cgroup.Name and configs.Cgroup.Parent.
+func TestInvalidAbsoluteCgroupParent(t *testing.T) {
+	root, err := getCgroupRoot()
+	if err != nil {
+		t.Errorf("couldn't get cgroup root: %v", err)
+	}
+
+	config := &configs.Cgroup{
+		Parent: "/../../../../../../../../../../some/path",
+		Name:   "name",
+	}
+
+	data, err := getCgroupData(config, 0)
+	if err != nil {
+		t.Errorf("couldn't get cgroup data: %v", err)
+	}
+
+	// Make sure the final innerPath doesn't go outside the cgroup mountpoint.
+	if strings.HasPrefix(data.innerPath, "..") {
+		t.Errorf("SECURITY: cgroup innerPath is outside cgroup mountpoint!")
+	}
+
+	// Double-check, using an actual cgroup.
+	deviceRoot := filepath.Join(root, "devices")
+	devicePath, err := data.path("devices")
+	if err != nil {
+		t.Errorf("couldn't get cgroup path: %v", err)
+	}
+	if !strings.HasPrefix(devicePath, deviceRoot) {
+		t.Errorf("SECURITY: cgroup path() is outside cgroup mountpoint!")
+	}
+}
+
+// XXX: Remove me after we get rid of configs.Cgroup.Name and configs.Cgroup.Parent.
+func TestInvalidCgroupName(t *testing.T) {
+	root, err := getCgroupRoot()
+	if err != nil {
+		t.Errorf("couldn't get cgroup root: %v", err)
+	}
+
+	config := &configs.Cgroup{
+		Parent: "parent",
+		Name:   "../../../../../../../../../../some/path",
+	}
+
+	data, err := getCgroupData(config, 0)
+	if err != nil {
+		t.Errorf("couldn't get cgroup data: %v", err)
+	}
+
+	// Make sure the final innerPath doesn't go outside the cgroup mountpoint.
+	if strings.HasPrefix(data.innerPath, "..") {
+		t.Errorf("SECURITY: cgroup innerPath is outside cgroup mountpoint!")
+	}
+
+	// Double-check, using an actual cgroup.
+	deviceRoot := filepath.Join(root, "devices")
+	devicePath, err := data.path("devices")
+	if err != nil {
+		t.Errorf("couldn't get cgroup path: %v", err)
+	}
+	if !strings.HasPrefix(devicePath, deviceRoot) {
+		t.Errorf("SECURITY: cgroup path() is outside cgroup mountpoint!")
+	}
+
+}
+
+// XXX: Remove me after we get rid of configs.Cgroup.Name and configs.Cgroup.Parent.
+func TestInvalidAbsoluteCgroupName(t *testing.T) {
+	root, err := getCgroupRoot()
+	if err != nil {
+		t.Errorf("couldn't get cgroup root: %v", err)
+	}
+
+	config := &configs.Cgroup{
+		Parent: "parent",
+		Name:   "/../../../../../../../../../../some/path",
+	}
+
+	data, err := getCgroupData(config, 0)
+	if err != nil {
+		t.Errorf("couldn't get cgroup data: %v", err)
+	}
+
+	// Make sure the final innerPath doesn't go outside the cgroup mountpoint.
+	if strings.HasPrefix(data.innerPath, "..") {
+		t.Errorf("SECURITY: cgroup innerPath is outside cgroup mountpoint!")
+	}
+
+	// Double-check, using an actual cgroup.
+	deviceRoot := filepath.Join(root, "devices")
+	devicePath, err := data.path("devices")
+	if err != nil {
+		t.Errorf("couldn't get cgroup path: %v", err)
+	}
+	if !strings.HasPrefix(devicePath, deviceRoot) {
+		t.Errorf("SECURITY: cgroup path() is outside cgroup mountpoint!")
+	}
+}
+
+// XXX: Remove me after we get rid of configs.Cgroup.Name and configs.Cgroup.Parent.
+func TestInvalidCgroupNameAndParent(t *testing.T) {
+	root, err := getCgroupRoot()
+	if err != nil {
+		t.Errorf("couldn't get cgroup root: %v", err)
+	}
+
+	config := &configs.Cgroup{
+		Parent: "../../../../../../../../../../some/path",
+		Name:   "../../../../../../../../../../some/path",
+	}
+
+	data, err := getCgroupData(config, 0)
+	if err != nil {
+		t.Errorf("couldn't get cgroup data: %v", err)
+	}
+
+	// Make sure the final innerPath doesn't go outside the cgroup mountpoint.
+	if strings.HasPrefix(data.innerPath, "..") {
+		t.Errorf("SECURITY: cgroup innerPath is outside cgroup mountpoint!")
+	}
+
+	// Double-check, using an actual cgroup.
+	deviceRoot := filepath.Join(root, "devices")
+	devicePath, err := data.path("devices")
+	if err != nil {
+		t.Errorf("couldn't get cgroup path: %v", err)
+	}
+	if !strings.HasPrefix(devicePath, deviceRoot) {
+		t.Errorf("SECURITY: cgroup path() is outside cgroup mountpoint!")
+	}
+}
+
+// XXX: Remove me after we get rid of configs.Cgroup.Name and configs.Cgroup.Parent.
+func TestInvalidAbsoluteCgroupNameAndParent(t *testing.T) {
+	root, err := getCgroupRoot()
+	if err != nil {
+		t.Errorf("couldn't get cgroup root: %v", err)
+	}
+
+	config := &configs.Cgroup{
+		Parent: "/../../../../../../../../../../some/path",
+		Name:   "/../../../../../../../../../../some/path",
+	}
+
+	data, err := getCgroupData(config, 0)
+	if err != nil {
+		t.Errorf("couldn't get cgroup data: %v", err)
+	}
+
+	// Make sure the final innerPath doesn't go outside the cgroup mountpoint.
+	if strings.HasPrefix(data.innerPath, "..") {
+		t.Errorf("SECURITY: cgroup innerPath is outside cgroup mountpoint!")
+	}
+
+	// Double-check, using an actual cgroup.
+	deviceRoot := filepath.Join(root, "devices")
+	devicePath, err := data.path("devices")
+	if err != nil {
+		t.Errorf("couldn't get cgroup path: %v", err)
+	}
+	if !strings.HasPrefix(devicePath, deviceRoot) {
+		t.Errorf("SECURITY: cgroup path() is outside cgroup mountpoint!")
+	}
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/blkio.go

@@ -0,0 +1,237 @@
+// +build linux
+
+package fs
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strconv"
+	"strings"
+
+	"github.com/opencontainers/runc/libcontainer/cgroups"
+	"github.com/opencontainers/runc/libcontainer/configs"
+)
+
+type BlkioGroup struct {
+}
+
+func (s *BlkioGroup) Name() string {
+	return "blkio"
+}
+
+func (s *BlkioGroup) Apply(d *cgroupData) error {
+	_, err := d.join("blkio")
+	if err != nil && !cgroups.IsNotFound(err) {
+		return err
+	}
+	return nil
+}
+
+func (s *BlkioGroup) Set(path string, cgroup *configs.Cgroup) error {
+	if cgroup.Resources.BlkioWeight != 0 {
+		if err := writeFile(path, "blkio.weight", strconv.FormatUint(uint64(cgroup.Resources.BlkioWeight), 10)); err != nil {
+			return err
+		}
+	}
+
+	if cgroup.Resources.BlkioLeafWeight != 0 {
+		if err := writeFile(path, "blkio.leaf_weight", strconv.FormatUint(uint64(cgroup.Resources.BlkioLeafWeight), 10)); err != nil {
+			return err
+		}
+	}
+	for _, wd := range cgroup.Resources.BlkioWeightDevice {
+		if err := writeFile(path, "blkio.weight_device", wd.WeightString()); err != nil {
+			return err
+		}
+		if err := writeFile(path, "blkio.leaf_weight_device", wd.LeafWeightString()); err != nil {
+			return err
+		}
+	}
+	for _, td := range cgroup.Resources.BlkioThrottleReadBpsDevice {
+		if err := writeFile(path, "blkio.throttle.read_bps_device", td.String()); err != nil {
+			return err
+		}
+	}
+	for _, td := range cgroup.Resources.BlkioThrottleWriteBpsDevice {
+		if err := writeFile(path, "blkio.throttle.write_bps_device", td.String()); err != nil {
+			return err
+		}
+	}
+	for _, td := range cgroup.Resources.BlkioThrottleReadIOPSDevice {
+		if err := writeFile(path, "blkio.throttle.read_iops_device", td.String()); err != nil {
+			return err
+		}
+	}
+	for _, td := range cgroup.Resources.BlkioThrottleWriteIOPSDevice {
+		if err := writeFile(path, "blkio.throttle.write_iops_device", td.String()); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (s *BlkioGroup) Remove(d *cgroupData) error {
+	return removePath(d.path("blkio"))
+}
+
+/*
+examples:
+
+    blkio.sectors
+    8:0 6792
+
+    blkio.io_service_bytes
+    8:0 Read 1282048
+    8:0 Write 2195456
+    8:0 Sync 2195456
+    8:0 Async 1282048
+    8:0 Total 3477504
+    Total 3477504
+
+    blkio.io_serviced
+    8:0 Read 124
+    8:0 Write 104
+    8:0 Sync 104
+    8:0 Async 124
+    8:0 Total 228
+    Total 228
+
+    blkio.io_queued
+    8:0 Read 0
+    8:0 Write 0
+    8:0 Sync 0
+    8:0 Async 0
+    8:0 Total 0
+    Total 0
+*/
+
+func splitBlkioStatLine(r rune) bool {
+	return r == ' ' || r == ':'
+}
+
+func getBlkioStat(path string) ([]cgroups.BlkioStatEntry, error) {
+	var blkioStats []cgroups.BlkioStatEntry
+	f, err := os.Open(path)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return blkioStats, nil
+		}
+		return nil, err
+	}
+	defer f.Close()
+
+	sc := bufio.NewScanner(f)
+	for sc.Scan() {
+		// format: dev type amount
+		fields := strings.FieldsFunc(sc.Text(), splitBlkioStatLine)
+		if len(fields) < 3 {
+			if len(fields) == 2 && fields[0] == "Total" {
+				// skip total line
+				continue
+			} else {
+				return nil, fmt.Errorf("Invalid line found while parsing %s: %s", path, sc.Text())
+			}
+		}
+
+		v, err := strconv.ParseUint(fields[0], 10, 64)
+		if err != nil {
+			return nil, err
+		}
+		major := v
+
+		v, err = strconv.ParseUint(fields[1], 10, 64)
+		if err != nil {
+			return nil, err
+		}
+		minor := v
+
+		op := ""
+		valueField := 2
+		if len(fields) == 4 {
+			op = fields[2]
+			valueField = 3
+		}
+		v, err = strconv.ParseUint(fields[valueField], 10, 64)
+		if err != nil {
+			return nil, err
+		}
+		blkioStats = append(blkioStats, cgroups.BlkioStatEntry{Major: major, Minor: minor, Op: op, Value: v})
+	}
+
+	return blkioStats, nil
+}
+
+func (s *BlkioGroup) GetStats(path string, stats *cgroups.Stats) error {
+	// Try to read CFQ stats available on all CFQ enabled kernels first
+	if blkioStats, err := getBlkioStat(filepath.Join(path, "blkio.io_serviced_recursive")); err == nil && blkioStats != nil {
+		return getCFQStats(path, stats)
+	}
+	return getStats(path, stats) // Use generic stats as fallback
+}
+
+func getCFQStats(path string, stats *cgroups.Stats) error {
+	var blkioStats []cgroups.BlkioStatEntry
+	var err error
+
+	if blkioStats, err = getBlkioStat(filepath.Join(path, "blkio.sectors_recursive")); err != nil {
+		return err
+	}
+	stats.BlkioStats.SectorsRecursive = blkioStats
+
+	if blkioStats, err = getBlkioStat(filepath.Join(path, "blkio.io_service_bytes_recursive")); err != nil {
+		return err
+	}
+	stats.BlkioStats.IoServiceBytesRecursive = blkioStats
+
+	if blkioStats, err = getBlkioStat(filepath.Join(path, "blkio.io_serviced_recursive")); err != nil {
+		return err
+	}
+	stats.BlkioStats.IoServicedRecursive = blkioStats
+
+	if blkioStats, err = getBlkioStat(filepath.Join(path, "blkio.io_queued_recursive")); err != nil {
+		return err
+	}
+	stats.BlkioStats.IoQueuedRecursive = blkioStats
+
+	if blkioStats, err = getBlkioStat(filepath.Join(path, "blkio.io_service_time_recursive")); err != nil {
+		return err
+	}
+	stats.BlkioStats.IoServiceTimeRecursive = blkioStats
+
+	if blkioStats, err = getBlkioStat(filepath.Join(path, "blkio.io_wait_time_recursive")); err != nil {
+		return err
+	}
+	stats.BlkioStats.IoWaitTimeRecursive = blkioStats
+
+	if blkioStats, err = getBlkioStat(filepath.Join(path, "blkio.io_merged_recursive")); err != nil {
+		return err
+	}
+	stats.BlkioStats.IoMergedRecursive = blkioStats
+
+	if blkioStats, err = getBlkioStat(filepath.Join(path, "blkio.time_recursive")); err != nil {
+		return err
+	}
+	stats.BlkioStats.IoTimeRecursive = blkioStats
+
+	return nil
+}
+
+func getStats(path string, stats *cgroups.Stats) error {
+	var blkioStats []cgroups.BlkioStatEntry
+	var err error
+
+	if blkioStats, err = getBlkioStat(filepath.Join(path, "blkio.throttle.io_service_bytes")); err != nil {
+		return err
+	}
+	stats.BlkioStats.IoServiceBytesRecursive = blkioStats
+
+	if blkioStats, err = getBlkioStat(filepath.Join(path, "blkio.throttle.io_serviced")); err != nil {
+		return err
+	}
+	stats.BlkioStats.IoServicedRecursive = blkioStats
+
+	return nil
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/cpu.go

@@ -0,0 +1,125 @@
+// +build linux
+
+package fs
+
+import (
+	"bufio"
+	"os"
+	"path/filepath"
+	"strconv"
+
+	"github.com/opencontainers/runc/libcontainer/cgroups"
+	"github.com/opencontainers/runc/libcontainer/configs"
+)
+
+type CpuGroup struct {
+}
+
+func (s *CpuGroup) Name() string {
+	return "cpu"
+}
+
+func (s *CpuGroup) Apply(d *cgroupData) error {
+	// We always want to join the cpu group, to allow fair cpu scheduling
+	// on a container basis
+	path, err := d.path("cpu")
+	if err != nil && !cgroups.IsNotFound(err) {
+		return err
+	}
+	return s.ApplyDir(path, d.config, d.pid)
+}
+
+func (s *CpuGroup) ApplyDir(path string, cgroup *configs.Cgroup, pid int) error {
+	// This might happen if we have no cpu cgroup mounted.
+	// Just do nothing and don't fail.
+	if path == "" {
+		return nil
+	}
+	if err := os.MkdirAll(path, 0755); err != nil {
+		return err
+	}
+	// We should set the real-Time group scheduling settings before moving
+	// in the process because if the process is already in SCHED_RR mode
+	// and no RT bandwidth is set, adding it will fail.
+	if err := s.SetRtSched(path, cgroup); err != nil {
+		return err
+	}
+	// because we are not using d.join we need to place the pid into the procs file
+	// unlike the other subsystems
+	if err := cgroups.WriteCgroupProc(path, pid); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (s *CpuGroup) SetRtSched(path string, cgroup *configs.Cgroup) error {
+	if cgroup.Resources.CpuRtPeriod != 0 {
+		if err := writeFile(path, "cpu.rt_period_us", strconv.FormatInt(cgroup.Resources.CpuRtPeriod, 10)); err != nil {
+			return err
+		}
+	}
+	if cgroup.Resources.CpuRtRuntime != 0 {
+		if err := writeFile(path, "cpu.rt_runtime_us", strconv.FormatInt(cgroup.Resources.CpuRtRuntime, 10)); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (s *CpuGroup) Set(path string, cgroup *configs.Cgroup) error {
+	if cgroup.Resources.CpuShares != 0 {
+		if err := writeFile(path, "cpu.shares", strconv.FormatInt(cgroup.Resources.CpuShares, 10)); err != nil {
+			return err
+		}
+	}
+	if cgroup.Resources.CpuPeriod != 0 {
+		if err := writeFile(path, "cpu.cfs_period_us", strconv.FormatInt(cgroup.Resources.CpuPeriod, 10)); err != nil {
+			return err
+		}
+	}
+	if cgroup.Resources.CpuQuota != 0 {
+		if err := writeFile(path, "cpu.cfs_quota_us", strconv.FormatInt(cgroup.Resources.CpuQuota, 10)); err != nil {
+			return err
+		}
+	}
+	if err := s.SetRtSched(path, cgroup); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (s *CpuGroup) Remove(d *cgroupData) error {
+	return removePath(d.path("cpu"))
+}
+
+func (s *CpuGroup) GetStats(path string, stats *cgroups.Stats) error {
+	f, err := os.Open(filepath.Join(path, "cpu.stat"))
+	if err != nil {
+		if os.IsNotExist(err) {
+			return nil
+		}
+		return err
+	}
+	defer f.Close()
+
+	sc := bufio.NewScanner(f)
+	for sc.Scan() {
+		t, v, err := getCgroupParamKeyValue(sc.Text())
+		if err != nil {
+			return err
+		}
+		switch t {
+		case "nr_periods":
+			stats.CpuStats.ThrottlingData.Periods = v
+
+		case "nr_throttled":
+			stats.CpuStats.ThrottlingData.ThrottledPeriods = v
+
+		case "throttled_time":
+			stats.CpuStats.ThrottlingData.ThrottledTime = v
+		}
+	}
+	return nil
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/cpu_test.go

@@ -0,0 +1,209 @@
+// +build linux
+
+package fs
+
+import (
+	"fmt"
+	"strconv"
+	"testing"
+
+	"github.com/opencontainers/runc/libcontainer/cgroups"
+)
+
+func TestCpuSetShares(t *testing.T) {
+	helper := NewCgroupTestUtil("cpu", t)
+	defer helper.cleanup()
+
+	const (
+		sharesBefore = 1024
+		sharesAfter  = 512
+	)
+
+	helper.writeFileContents(map[string]string{
+		"cpu.shares": strconv.Itoa(sharesBefore),
+	})
+
+	helper.CgroupData.config.Resources.CpuShares = sharesAfter
+	cpu := &CpuGroup{}
+	if err := cpu.Set(helper.CgroupPath, helper.CgroupData.config); err != nil {
+		t.Fatal(err)
+	}
+
+	value, err := getCgroupParamUint(helper.CgroupPath, "cpu.shares")
+	if err != nil {
+		t.Fatalf("Failed to parse cpu.shares - %s", err)
+	}
+
+	if value != sharesAfter {
+		t.Fatal("Got the wrong value, set cpu.shares failed.")
+	}
+}
+
+func TestCpuSetBandWidth(t *testing.T) {
+	helper := NewCgroupTestUtil("cpu", t)
+	defer helper.cleanup()
+
+	const (
+		quotaBefore     = 8000
+		quotaAfter      = 5000
+		periodBefore    = 10000
+		periodAfter     = 7000
+		rtRuntimeBefore = 8000
+		rtRuntimeAfter  = 5000
+		rtPeriodBefore  = 10000
+		rtPeriodAfter   = 7000
+	)
+
+	helper.writeFileContents(map[string]string{
+		"cpu.cfs_quota_us":  strconv.Itoa(quotaBefore),
+		"cpu.cfs_period_us": strconv.Itoa(periodBefore),
+		"cpu.rt_runtime_us": strconv.Itoa(rtRuntimeBefore),
+		"cpu.rt_period_us":  strconv.Itoa(rtPeriodBefore),
+	})
+
+	helper.CgroupData.config.Resources.CpuQuota = quotaAfter
+	helper.CgroupData.config.Resources.CpuPeriod = periodAfter
+	helper.CgroupData.config.Resources.CpuRtRuntime = rtRuntimeAfter
+	helper.CgroupData.config.Resources.CpuRtPeriod = rtPeriodAfter
+	cpu := &CpuGroup{}
+	if err := cpu.Set(helper.CgroupPath, helper.CgroupData.config); err != nil {
+		t.Fatal(err)
+	}
+
+	quota, err := getCgroupParamUint(helper.CgroupPath, "cpu.cfs_quota_us")
+	if err != nil {
+		t.Fatalf("Failed to parse cpu.cfs_quota_us - %s", err)
+	}
+	if quota != quotaAfter {
+		t.Fatal("Got the wrong value, set cpu.cfs_quota_us failed.")
+	}
+
+	period, err := getCgroupParamUint(helper.CgroupPath, "cpu.cfs_period_us")
+	if err != nil {
+		t.Fatalf("Failed to parse cpu.cfs_period_us - %s", err)
+	}
+	if period != periodAfter {
+		t.Fatal("Got the wrong value, set cpu.cfs_period_us failed.")
+	}
+	rtRuntime, err := getCgroupParamUint(helper.CgroupPath, "cpu.rt_runtime_us")
+	if err != nil {
+		t.Fatalf("Failed to parse cpu.rt_runtime_us - %s", err)
+	}
+	if rtRuntime != rtRuntimeAfter {
+		t.Fatal("Got the wrong value, set cpu.rt_runtime_us failed.")
+	}
+	rtPeriod, err := getCgroupParamUint(helper.CgroupPath, "cpu.rt_period_us")
+	if err != nil {
+		t.Fatalf("Failed to parse cpu.rt_period_us - %s", err)
+	}
+	if rtPeriod != rtPeriodAfter {
+		t.Fatal("Got the wrong value, set cpu.rt_period_us failed.")
+	}
+}
+
+func TestCpuStats(t *testing.T) {
+	helper := NewCgroupTestUtil("cpu", t)
+	defer helper.cleanup()
+
+	const (
+		nrPeriods     = 2000
+		nrThrottled   = 200
+		throttledTime = uint64(18446744073709551615)
+	)
+
+	cpuStatContent := fmt.Sprintf("nr_periods %d\n nr_throttled %d\n throttled_time %d\n",
+		nrPeriods, nrThrottled, throttledTime)
+	helper.writeFileContents(map[string]string{
+		"cpu.stat": cpuStatContent,
+	})
+
+	cpu := &CpuGroup{}
+	actualStats := *cgroups.NewStats()
+	err := cpu.GetStats(helper.CgroupPath, &actualStats)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	expectedStats := cgroups.ThrottlingData{
+		Periods:          nrPeriods,
+		ThrottledPeriods: nrThrottled,
+		ThrottledTime:    throttledTime}
+
+	expectThrottlingDataEquals(t, expectedStats, actualStats.CpuStats.ThrottlingData)
+}
+
+func TestNoCpuStatFile(t *testing.T) {
+	helper := NewCgroupTestUtil("cpu", t)
+	defer helper.cleanup()
+
+	cpu := &CpuGroup{}
+	actualStats := *cgroups.NewStats()
+	err := cpu.GetStats(helper.CgroupPath, &actualStats)
+	if err != nil {
+		t.Fatal("Expected not to fail, but did")
+	}
+}
+
+func TestInvalidCpuStat(t *testing.T) {
+	helper := NewCgroupTestUtil("cpu", t)
+	defer helper.cleanup()
+	cpuStatContent := `nr_periods 2000
+	nr_throttled 200
+	throttled_time fortytwo`
+	helper.writeFileContents(map[string]string{
+		"cpu.stat": cpuStatContent,
+	})
+
+	cpu := &CpuGroup{}
+	actualStats := *cgroups.NewStats()
+	err := cpu.GetStats(helper.CgroupPath, &actualStats)
+	if err == nil {
+		t.Fatal("Expected failed stat parsing.")
+	}
+}
+
+func TestCpuSetRtSchedAtApply(t *testing.T) {
+	helper := NewCgroupTestUtil("cpu", t)
+	defer helper.cleanup()
+
+	const (
+		rtRuntimeBefore = 0
+		rtRuntimeAfter  = 5000
+		rtPeriodBefore  = 0
+		rtPeriodAfter   = 7000
+	)
+
+	helper.writeFileContents(map[string]string{
+		"cpu.rt_runtime_us": strconv.Itoa(rtRuntimeBefore),
+		"cpu.rt_period_us":  strconv.Itoa(rtPeriodBefore),
+	})
+
+	helper.CgroupData.config.Resources.CpuRtRuntime = rtRuntimeAfter
+	helper.CgroupData.config.Resources.CpuRtPeriod = rtPeriodAfter
+	cpu := &CpuGroup{}
+	if err := cpu.ApplyDir(helper.CgroupPath, helper.CgroupData.config, 1234); err != nil {
+		t.Fatal(err)
+	}
+
+	rtRuntime, err := getCgroupParamUint(helper.CgroupPath, "cpu.rt_runtime_us")
+	if err != nil {
+		t.Fatalf("Failed to parse cpu.rt_runtime_us - %s", err)
+	}
+	if rtRuntime != rtRuntimeAfter {
+		t.Fatal("Got the wrong value, set cpu.rt_runtime_us failed.")
+	}
+	rtPeriod, err := getCgroupParamUint(helper.CgroupPath, "cpu.rt_period_us")
+	if err != nil {
+		t.Fatalf("Failed to parse cpu.rt_period_us - %s", err)
+	}
+	if rtPeriod != rtPeriodAfter {
+		t.Fatal("Got the wrong value, set cpu.rt_period_us failed.")
+	}
+	pid, err := getCgroupParamUint(helper.CgroupPath, "cgroup.procs")
+	if err != nil {
+		t.Fatalf("Failed to parse cgroup.procs - %s", err)
+	}
+	if pid != 1234 {
+		t.Fatal("Got the wrong value, set cgroup.procs failed.")
+	}
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/cpuacct.go

@@ -0,0 +1,121 @@
+// +build linux
+
+package fs
+
+import (
+	"fmt"
+	"io/ioutil"
+	"path/filepath"
+	"strconv"
+	"strings"
+
+	"github.com/opencontainers/runc/libcontainer/cgroups"
+	"github.com/opencontainers/runc/libcontainer/configs"
+	"github.com/opencontainers/runc/libcontainer/system"
+)
+
+const (
+	cgroupCpuacctStat   = "cpuacct.stat"
+	nanosecondsInSecond = 1000000000
+)
+
+var clockTicks = uint64(system.GetClockTicks())
+
+type CpuacctGroup struct {
+}
+
+func (s *CpuacctGroup) Name() string {
+	return "cpuacct"
+}
+
+func (s *CpuacctGroup) Apply(d *cgroupData) error {
+	// we just want to join this group even though we don't set anything
+	if _, err := d.join("cpuacct"); err != nil && !cgroups.IsNotFound(err) {
+		return err
+	}
+
+	return nil
+}
+
+func (s *CpuacctGroup) Set(path string, cgroup *configs.Cgroup) error {
+	return nil
+}
+
+func (s *CpuacctGroup) Remove(d *cgroupData) error {
+	return removePath(d.path("cpuacct"))
+}
+
+func (s *CpuacctGroup) GetStats(path string, stats *cgroups.Stats) error {
+	userModeUsage, kernelModeUsage, err := getCpuUsageBreakdown(path)
+	if err != nil {
+		return err
+	}
+
+	totalUsage, err := getCgroupParamUint(path, "cpuacct.usage")
+	if err != nil {
+		return err
+	}
+
+	percpuUsage, err := getPercpuUsage(path)
+	if err != nil {
+		return err
+	}
+
+	stats.CpuStats.CpuUsage.TotalUsage = totalUsage
+	stats.CpuStats.CpuUsage.PercpuUsage = percpuUsage
+	stats.CpuStats.CpuUsage.UsageInUsermode = userModeUsage
+	stats.CpuStats.CpuUsage.UsageInKernelmode = kernelModeUsage
+	return nil
+}
+
+// Returns user and kernel usage breakdown in nanoseconds.
+func getCpuUsageBreakdown(path string) (uint64, uint64, error) {
+	userModeUsage := uint64(0)
+	kernelModeUsage := uint64(0)
+	const (
+		userField   = "user"
+		systemField = "system"
+	)
+
+	// Expected format:
+	// user <usage in ticks>
+	// system <usage in ticks>
+	data, err := ioutil.ReadFile(filepath.Join(path, cgroupCpuacctStat))
+	if err != nil {
+		return 0, 0, err
+	}
+	fields := strings.Fields(string(data))
+	if len(fields) != 4 {
+		return 0, 0, fmt.Errorf("failure - %s is expected to have 4 fields", filepath.Join(path, cgroupCpuacctStat))
+	}
+	if fields[0] != userField {
+		return 0, 0, fmt.Errorf("unexpected field %q in %q, expected %q", fields[0], cgroupCpuacctStat, userField)
+	}
+	if fields[2] != systemField {
+		return 0, 0, fmt.Errorf("unexpected field %q in %q, expected %q", fields[2], cgroupCpuacctStat, systemField)
+	}
+	if userModeUsage, err = strconv.ParseUint(fields[1], 10, 64); err != nil {
+		return 0, 0, err
+	}
+	if kernelModeUsage, err = strconv.ParseUint(fields[3], 10, 64); err != nil {
+		return 0, 0, err
+	}
+
+	return (userModeUsage * nanosecondsInSecond) / clockTicks, (kernelModeUsage * nanosecondsInSecond) / clockTicks, nil
+}
+
+func getPercpuUsage(path string) ([]uint64, error) {
+	percpuUsage := []uint64{}
+	data, err := ioutil.ReadFile(filepath.Join(path, "cpuacct.usage_percpu"))
+	if err != nil {
+		return percpuUsage, err
+	}
+	for _, value := range strings.Fields(string(data)) {
+		value, err := strconv.ParseUint(value, 10, 64)
+		if err != nil {
+			return percpuUsage, fmt.Errorf("Unable to convert param value to uint64: %s", err)
+		}
+		percpuUsage = append(percpuUsage, value)
+	}
+	return percpuUsage, nil
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/cpuset.go

@@ -0,0 +1,162 @@
+// +build linux
+
+package fs
+
+import (
+	"bytes"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+
+	"github.com/opencontainers/runc/libcontainer/cgroups"
+	"github.com/opencontainers/runc/libcontainer/configs"
+	libcontainerUtils "github.com/opencontainers/runc/libcontainer/utils"
+)
+
+type CpusetGroup struct {
+}
+
+func (s *CpusetGroup) Name() string {
+	return "cpuset"
+}
+
+func (s *CpusetGroup) Apply(d *cgroupData) error {
+	dir, err := d.path("cpuset")
+	if err != nil && !cgroups.IsNotFound(err) {
+		return err
+	}
+	return s.ApplyDir(dir, d.config, d.pid)
+}
+
+func (s *CpusetGroup) Set(path string, cgroup *configs.Cgroup) error {
+	if cgroup.Resources.CpusetCpus != "" {
+		if err := writeFile(path, "cpuset.cpus", cgroup.Resources.CpusetCpus); err != nil {
+			return err
+		}
+	}
+	if cgroup.Resources.CpusetMems != "" {
+		if err := writeFile(path, "cpuset.mems", cgroup.Resources.CpusetMems); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (s *CpusetGroup) Remove(d *cgroupData) error {
+	return removePath(d.path("cpuset"))
+}
+
+func (s *CpusetGroup) GetStats(path string, stats *cgroups.Stats) error {
+	return nil
+}
+
+func (s *CpusetGroup) ApplyDir(dir string, cgroup *configs.Cgroup, pid int) error {
+	// This might happen if we have no cpuset cgroup mounted.
+	// Just do nothing and don't fail.
+	if dir == "" {
+		return nil
+	}
+	root, err := getCgroupRoot()
+	if err != nil {
+		return err
+	}
+	// 'ensureParent' start with parent because we don't want to
+	// explicitly inherit from parent, it could conflict with
+	// 'cpuset.cpu_exclusive'.
+	if err := s.ensureParent(filepath.Dir(dir), root); err != nil {
+		return err
+	}
+	if err := os.MkdirAll(dir, 0755); err != nil {
+		return err
+	}
+	// We didn't inherit cpuset configs from parent, but we have
+	// to ensure cpuset configs are set before moving task into the
+	// cgroup.
+	// The logic is, if user specified cpuset configs, use these
+	// specified configs, otherwise, inherit from parent. This makes
+	// cpuset configs work correctly with 'cpuset.cpu_exclusive', and
+	// keep backward compatbility.
+	if err := s.ensureCpusAndMems(dir, cgroup); err != nil {
+		return err
+	}
+
+	// because we are not using d.join we need to place the pid into the procs file
+	// unlike the other subsystems
+	if err := cgroups.WriteCgroupProc(dir, pid); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (s *CpusetGroup) getSubsystemSettings(parent string) (cpus []byte, mems []byte, err error) {
+	if cpus, err = ioutil.ReadFile(filepath.Join(parent, "cpuset.cpus")); err != nil {
+		return
+	}
+	if mems, err = ioutil.ReadFile(filepath.Join(parent, "cpuset.mems")); err != nil {
+		return
+	}
+	return cpus, mems, nil
+}
+
+// ensureParent makes sure that the parent directory of current is created
+// and populated with the proper cpus and mems files copied from
+// it's parent.
+func (s *CpusetGroup) ensureParent(current, root string) error {
+	parent := filepath.Dir(current)
+	if libcontainerUtils.CleanPath(parent) == root {
+		return nil
+	}
+	// Avoid infinite recursion.
+	if parent == current {
+		return fmt.Errorf("cpuset: cgroup parent path outside cgroup root")
+	}
+	if err := s.ensureParent(parent, root); err != nil {
+		return err
+	}
+	if err := os.MkdirAll(current, 0755); err != nil {
+		return err
+	}
+	return s.copyIfNeeded(current, parent)
+}
+
+// copyIfNeeded copies the cpuset.cpus and cpuset.mems from the parent
+// directory to the current directory if the file's contents are 0
+func (s *CpusetGroup) copyIfNeeded(current, parent string) error {
+	var (
+		err                      error
+		currentCpus, currentMems []byte
+		parentCpus, parentMems   []byte
+	)
+
+	if currentCpus, currentMems, err = s.getSubsystemSettings(current); err != nil {
+		return err
+	}
+	if parentCpus, parentMems, err = s.getSubsystemSettings(parent); err != nil {
+		return err
+	}
+
+	if s.isEmpty(currentCpus) {
+		if err := writeFile(current, "cpuset.cpus", string(parentCpus)); err != nil {
+			return err
+		}
+	}
+	if s.isEmpty(currentMems) {
+		if err := writeFile(current, "cpuset.mems", string(parentMems)); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (s *CpusetGroup) isEmpty(b []byte) bool {
+	return len(bytes.Trim(b, "\n")) == 0
+}
+
+func (s *CpusetGroup) ensureCpusAndMems(path string, cgroup *configs.Cgroup) error {
+	if err := s.Set(path, cgroup); err != nil {
+		return err
+	}
+	return s.copyIfNeeded(path, filepath.Dir(path))
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/cpuset_test.go

@@ -0,0 +1,65 @@
+// +build linux
+
+package fs
+
+import (
+	"testing"
+)
+
+func TestCpusetSetCpus(t *testing.T) {
+	helper := NewCgroupTestUtil("cpuset", t)
+	defer helper.cleanup()
+
+	const (
+		cpusBefore = "0"
+		cpusAfter  = "1-3"
+	)
+
+	helper.writeFileContents(map[string]string{
+		"cpuset.cpus": cpusBefore,
+	})
+
+	helper.CgroupData.config.Resources.CpusetCpus = cpusAfter
+	cpuset := &CpusetGroup{}
+	if err := cpuset.Set(helper.CgroupPath, helper.CgroupData.config); err != nil {
+		t.Fatal(err)
+	}
+
+	value, err := getCgroupParamString(helper.CgroupPath, "cpuset.cpus")
+	if err != nil {
+		t.Fatalf("Failed to parse cpuset.cpus - %s", err)
+	}
+
+	if value != cpusAfter {
+		t.Fatal("Got the wrong value, set cpuset.cpus failed.")
+	}
+}
+
+func TestCpusetSetMems(t *testing.T) {
+	helper := NewCgroupTestUtil("cpuset", t)
+	defer helper.cleanup()
+
+	const (
+		memsBefore = "0"
+		memsAfter  = "1"
+	)
+
+	helper.writeFileContents(map[string]string{
+		"cpuset.mems": memsBefore,
+	})
+
+	helper.CgroupData.config.Resources.CpusetMems = memsAfter
+	cpuset := &CpusetGroup{}
+	if err := cpuset.Set(helper.CgroupPath, helper.CgroupData.config); err != nil {
+		t.Fatal(err)
+	}
+
+	value, err := getCgroupParamString(helper.CgroupPath, "cpuset.mems")
+	if err != nil {
+		t.Fatalf("Failed to parse cpuset.mems - %s", err)
+	}
+
+	if value != memsAfter {
+		t.Fatal("Got the wrong value, set cpuset.mems failed.")
+	}
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/devices.go

@@ -0,0 +1,80 @@
+// +build linux
+
+package fs
+
+import (
+	"github.com/opencontainers/runc/libcontainer/cgroups"
+	"github.com/opencontainers/runc/libcontainer/configs"
+	"github.com/opencontainers/runc/libcontainer/system"
+)
+
+type DevicesGroup struct {
+}
+
+func (s *DevicesGroup) Name() string {
+	return "devices"
+}
+
+func (s *DevicesGroup) Apply(d *cgroupData) error {
+	_, err := d.join("devices")
+	if err != nil {
+		// We will return error even it's `not found` error, devices
+		// cgroup is hard requirement for container's security.
+		return err
+	}
+	return nil
+}
+
+func (s *DevicesGroup) Set(path string, cgroup *configs.Cgroup) error {
+	if system.RunningInUserNS() {
+		return nil
+	}
+
+	devices := cgroup.Resources.Devices
+	if len(devices) > 0 {
+		for _, dev := range devices {
+			file := "devices.deny"
+			if dev.Allow {
+				file = "devices.allow"
+			}
+			if err := writeFile(path, file, dev.CgroupString()); err != nil {
+				return err
+			}
+		}
+		return nil
+	}
+	if cgroup.Resources.AllowAllDevices != nil {
+		if *cgroup.Resources.AllowAllDevices == false {
+			if err := writeFile(path, "devices.deny", "a"); err != nil {
+				return err
+			}
+
+			for _, dev := range cgroup.Resources.AllowedDevices {
+				if err := writeFile(path, "devices.allow", dev.CgroupString()); err != nil {
+					return err
+				}
+			}
+			return nil
+		}
+
+		if err := writeFile(path, "devices.allow", "a"); err != nil {
+			return err
+		}
+	}
+
+	for _, dev := range cgroup.Resources.DeniedDevices {
+		if err := writeFile(path, "devices.deny", dev.CgroupString()); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (s *DevicesGroup) Remove(d *cgroupData) error {
+	return removePath(d.path("devices"))
+}
+
+func (s *DevicesGroup) GetStats(path string, stats *cgroups.Stats) error {
+	return nil
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/devices_test.go

@@ -0,0 +1,98 @@
+// +build linux
+
+package fs
+
+import (
+	"testing"
+
+	"github.com/opencontainers/runc/libcontainer/configs"
+)
+
+var (
+	allowedDevices = []*configs.Device{
+		{
+			Path:        "/dev/zero",
+			Type:        'c',
+			Major:       1,
+			Minor:       5,
+			Permissions: "rwm",
+			FileMode:    0666,
+		},
+	}
+	allowedList   = "c 1:5 rwm"
+	deniedDevices = []*configs.Device{
+		{
+			Path:        "/dev/null",
+			Type:        'c',
+			Major:       1,
+			Minor:       3,
+			Permissions: "rwm",
+			FileMode:    0666,
+		},
+	}
+	deniedList = "c 1:3 rwm"
+)
+
+func TestDevicesSetAllow(t *testing.T) {
+	helper := NewCgroupTestUtil("devices", t)
+	defer helper.cleanup()
+
+	helper.writeFileContents(map[string]string{
+		"devices.deny": "a",
+	})
+	allowAllDevices := false
+	helper.CgroupData.config.Resources.AllowAllDevices = &allowAllDevices
+	helper.CgroupData.config.Resources.AllowedDevices = allowedDevices
+	devices := &DevicesGroup{}
+	if err := devices.Set(helper.CgroupPath, helper.CgroupData.config); err != nil {
+		t.Fatal(err)
+	}
+
+	value, err := getCgroupParamString(helper.CgroupPath, "devices.allow")
+	if err != nil {
+		t.Fatalf("Failed to parse devices.allow - %s", err)
+	}
+
+	if value != allowedList {
+		t.Fatal("Got the wrong value, set devices.allow failed.")
+	}
+
+	// When AllowAllDevices is nil, devices.allow file should not be modified.
+	helper.CgroupData.config.Resources.AllowAllDevices = nil
+	if err := devices.Set(helper.CgroupPath, helper.CgroupData.config); err != nil {
+		t.Fatal(err)
+	}
+	value, err = getCgroupParamString(helper.CgroupPath, "devices.allow")
+	if err != nil {
+		t.Fatalf("Failed to parse devices.allow - %s", err)
+	}
+	if value != allowedList {
+		t.Fatal("devices policy shouldn't have changed on AllowedAllDevices=nil.")
+	}
+}
+
+func TestDevicesSetDeny(t *testing.T) {
+	helper := NewCgroupTestUtil("devices", t)
+	defer helper.cleanup()
+
+	helper.writeFileContents(map[string]string{
+		"devices.allow": "a",
+	})
+
+	allowAllDevices := true
+	helper.CgroupData.config.Resources.AllowAllDevices = &allowAllDevices
+	helper.CgroupData.config.Resources.DeniedDevices = deniedDevices
+	devices := &DevicesGroup{}
+	if err := devices.Set(helper.CgroupPath, helper.CgroupData.config); err != nil {
+		t.Fatal(err)
+	}
+
+	value, err := getCgroupParamString(helper.CgroupPath, "devices.deny")
+	if err != nil {
+		t.Fatalf("Failed to parse devices.deny - %s", err)
+	}
+
+	if value != deniedList {
+		t.Fatal("Got the wrong value, set devices.deny failed.")
+	}
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/freezer.go

@@ -0,0 +1,61 @@
+// +build linux
+
+package fs
+
+import (
+	"fmt"
+	"strings"
+	"time"
+
+	"github.com/opencontainers/runc/libcontainer/cgroups"
+	"github.com/opencontainers/runc/libcontainer/configs"
+)
+
+type FreezerGroup struct {
+}
+
+func (s *FreezerGroup) Name() string {
+	return "freezer"
+}
+
+func (s *FreezerGroup) Apply(d *cgroupData) error {
+	_, err := d.join("freezer")
+	if err != nil && !cgroups.IsNotFound(err) {
+		return err
+	}
+	return nil
+}
+
+func (s *FreezerGroup) Set(path string, cgroup *configs.Cgroup) error {
+	switch cgroup.Resources.Freezer {
+	case configs.Frozen, configs.Thawed:
+		if err := writeFile(path, "freezer.state", string(cgroup.Resources.Freezer)); err != nil {
+			return err
+		}
+
+		for {
+			state, err := readFile(path, "freezer.state")
+			if err != nil {
+				return err
+			}
+			if strings.TrimSpace(state) == string(cgroup.Resources.Freezer) {
+				break
+			}
+			time.Sleep(1 * time.Millisecond)
+		}
+	case configs.Undefined:
+		return nil
+	default:
+		return fmt.Errorf("Invalid argument '%s' to freezer.state", string(cgroup.Resources.Freezer))
+	}
+
+	return nil
+}
+
+func (s *FreezerGroup) Remove(d *cgroupData) error {
+	return removePath(d.path("freezer"))
+}
+
+func (s *FreezerGroup) GetStats(path string, stats *cgroups.Stats) error {
+	return nil
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/freezer_test.go

@@ -0,0 +1,47 @@
+// +build linux
+
+package fs
+
+import (
+	"testing"
+
+	"github.com/opencontainers/runc/libcontainer/configs"
+)
+
+func TestFreezerSetState(t *testing.T) {
+	helper := NewCgroupTestUtil("freezer", t)
+	defer helper.cleanup()
+
+	helper.writeFileContents(map[string]string{
+		"freezer.state": string(configs.Frozen),
+	})
+
+	helper.CgroupData.config.Resources.Freezer = configs.Thawed
+	freezer := &FreezerGroup{}
+	if err := freezer.Set(helper.CgroupPath, helper.CgroupData.config); err != nil {
+		t.Fatal(err)
+	}
+
+	value, err := getCgroupParamString(helper.CgroupPath, "freezer.state")
+	if err != nil {
+		t.Fatalf("Failed to parse freezer.state - %s", err)
+	}
+	if value != string(configs.Thawed) {
+		t.Fatal("Got the wrong value, set freezer.state failed.")
+	}
+}
+
+func TestFreezerSetInvalidState(t *testing.T) {
+	helper := NewCgroupTestUtil("freezer", t)
+	defer helper.cleanup()
+
+	const (
+		invalidArg configs.FreezerState = "Invalid"
+	)
+
+	helper.CgroupData.config.Resources.Freezer = invalidArg
+	freezer := &FreezerGroup{}
+	if err := freezer.Set(helper.CgroupPath, helper.CgroupData.config); err == nil {
+		t.Fatal("Failed to return invalid argument error")
+	}
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/fs_unsupported.go

@@ -0,0 +1,3 @@
+// +build !linux
+
+package fs

vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/hugetlb.go

@@ -0,0 +1,71 @@
+// +build linux
+
+package fs
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+
+	"github.com/opencontainers/runc/libcontainer/cgroups"
+	"github.com/opencontainers/runc/libcontainer/configs"
+)
+
+type HugetlbGroup struct {
+}
+
+func (s *HugetlbGroup) Name() string {
+	return "hugetlb"
+}
+
+func (s *HugetlbGroup) Apply(d *cgroupData) error {
+	_, err := d.join("hugetlb")
+	if err != nil && !cgroups.IsNotFound(err) {
+		return err
+	}
+	return nil
+}
+
+func (s *HugetlbGroup) Set(path string, cgroup *configs.Cgroup) error {
+	for _, hugetlb := range cgroup.Resources.HugetlbLimit {
+		if err := writeFile(path, strings.Join([]string{"hugetlb", hugetlb.Pagesize, "limit_in_bytes"}, "."), strconv.FormatUint(hugetlb.Limit, 10)); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (s *HugetlbGroup) Remove(d *cgroupData) error {
+	return removePath(d.path("hugetlb"))
+}
+
+func (s *HugetlbGroup) GetStats(path string, stats *cgroups.Stats) error {
+	hugetlbStats := cgroups.HugetlbStats{}
+	for _, pageSize := range HugePageSizes {
+		usage := strings.Join([]string{"hugetlb", pageSize, "usage_in_bytes"}, ".")
+		value, err := getCgroupParamUint(path, usage)
+		if err != nil {
+			return fmt.Errorf("failed to parse %s - %v", usage, err)
+		}
+		hugetlbStats.Usage = value
+
+		maxUsage := strings.Join([]string{"hugetlb", pageSize, "max_usage_in_bytes"}, ".")
+		value, err = getCgroupParamUint(path, maxUsage)
+		if err != nil {
+			return fmt.Errorf("failed to parse %s - %v", maxUsage, err)
+		}
+		hugetlbStats.MaxUsage = value
+
+		failcnt := strings.Join([]string{"hugetlb", pageSize, "failcnt"}, ".")
+		value, err = getCgroupParamUint(path, failcnt)
+		if err != nil {
+			return fmt.Errorf("failed to parse %s - %v", failcnt, err)
+		}
+		hugetlbStats.Failcnt = value
+
+		stats.HugetlbStats[pageSize] = hugetlbStats
+	}
+
+	return nil
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/hugetlb_test.go

@@ -0,0 +1,154 @@
+// +build linux
+
+package fs
+
+import (
+	"fmt"
+	"strconv"
+	"testing"
+
+	"github.com/opencontainers/runc/libcontainer/cgroups"
+	"github.com/opencontainers/runc/libcontainer/configs"
+)
+
+const (
+	hugetlbUsageContents    = "128\n"
+	hugetlbMaxUsageContents = "256\n"
+	hugetlbFailcnt          = "100\n"
+)
+
+var (
+	usage    = "hugetlb.%s.usage_in_bytes"
+	limit    = "hugetlb.%s.limit_in_bytes"
+	maxUsage = "hugetlb.%s.max_usage_in_bytes"
+	failcnt  = "hugetlb.%s.failcnt"
+)
+
+func TestHugetlbSetHugetlb(t *testing.T) {
+	helper := NewCgroupTestUtil("hugetlb", t)
+	defer helper.cleanup()
+
+	const (
+		hugetlbBefore = 256
+		hugetlbAfter  = 512
+	)
+
+	for _, pageSize := range HugePageSizes {
+		helper.writeFileContents(map[string]string{
+			fmt.Sprintf(limit, pageSize): strconv.Itoa(hugetlbBefore),
+		})
+	}
+
+	for _, pageSize := range HugePageSizes {
+		helper.CgroupData.config.Resources.HugetlbLimit = []*configs.HugepageLimit{
+			{
+				Pagesize: pageSize,
+				Limit:    hugetlbAfter,
+			},
+		}
+		hugetlb := &HugetlbGroup{}
+		if err := hugetlb.Set(helper.CgroupPath, helper.CgroupData.config); err != nil {
+			t.Fatal(err)
+		}
+	}
+
+	for _, pageSize := range HugePageSizes {
+		limit := fmt.Sprintf(limit, pageSize)
+		value, err := getCgroupParamUint(helper.CgroupPath, limit)
+		if err != nil {
+			t.Fatalf("Failed to parse %s - %s", limit, err)
+		}
+		if value != hugetlbAfter {
+			t.Fatalf("Set hugetlb.limit_in_bytes failed. Expected: %v, Got: %v", hugetlbAfter, value)
+		}
+	}
+}
+
+func TestHugetlbStats(t *testing.T) {
+	helper := NewCgroupTestUtil("hugetlb", t)
+	defer helper.cleanup()
+	for _, pageSize := range HugePageSizes {
+		helper.writeFileContents(map[string]string{
+			fmt.Sprintf(usage, pageSize):    hugetlbUsageContents,
+			fmt.Sprintf(maxUsage, pageSize): hugetlbMaxUsageContents,
+			fmt.Sprintf(failcnt, pageSize):  hugetlbFailcnt,
+		})
+	}
+
+	hugetlb := &HugetlbGroup{}
+	actualStats := *cgroups.NewStats()
+	err := hugetlb.GetStats(helper.CgroupPath, &actualStats)
+	if err != nil {
+		t.Fatal(err)
+	}
+	expectedStats := cgroups.HugetlbStats{Usage: 128, MaxUsage: 256, Failcnt: 100}
+	for _, pageSize := range HugePageSizes {
+		expectHugetlbStatEquals(t, expectedStats, actualStats.HugetlbStats[pageSize])
+	}
+}
+
+func TestHugetlbStatsNoUsageFile(t *testing.T) {
+	helper := NewCgroupTestUtil("hugetlb", t)
+	defer helper.cleanup()
+	helper.writeFileContents(map[string]string{
+		maxUsage: hugetlbMaxUsageContents,
+	})
+
+	hugetlb := &HugetlbGroup{}
+	actualStats := *cgroups.NewStats()
+	err := hugetlb.GetStats(helper.CgroupPath, &actualStats)
+	if err == nil {
+		t.Fatal("Expected failure")
+	}
+}
+
+func TestHugetlbStatsNoMaxUsageFile(t *testing.T) {
+	helper := NewCgroupTestUtil("hugetlb", t)
+	defer helper.cleanup()
+	for _, pageSize := range HugePageSizes {
+		helper.writeFileContents(map[string]string{
+			fmt.Sprintf(usage, pageSize): hugetlbUsageContents,
+		})
+	}
+
+	hugetlb := &HugetlbGroup{}
+	actualStats := *cgroups.NewStats()
+	err := hugetlb.GetStats(helper.CgroupPath, &actualStats)
+	if err == nil {
+		t.Fatal("Expected failure")
+	}
+}
+
+func TestHugetlbStatsBadUsageFile(t *testing.T) {
+	helper := NewCgroupTestUtil("hugetlb", t)
+	defer helper.cleanup()
+	for _, pageSize := range HugePageSizes {
+		helper.writeFileContents(map[string]string{
+			fmt.Sprintf(usage, pageSize): "bad",
+			maxUsage:                     hugetlbMaxUsageContents,
+		})
+	}
+
+	hugetlb := &HugetlbGroup{}
+	actualStats := *cgroups.NewStats()
+	err := hugetlb.GetStats(helper.CgroupPath, &actualStats)
+	if err == nil {
+		t.Fatal("Expected failure")
+	}
+}
+
+func TestHugetlbStatsBadMaxUsageFile(t *testing.T) {
+	helper := NewCgroupTestUtil("hugetlb", t)
+	defer helper.cleanup()
+	helper.writeFileContents(map[string]string{
+		usage:    hugetlbUsageContents,
+		maxUsage: "bad",
+	})
+
+	hugetlb := &HugetlbGroup{}
+	actualStats := *cgroups.NewStats()
+	err := hugetlb.GetStats(helper.CgroupPath, &actualStats)
+	if err == nil {
+		t.Fatal("Expected failure")
+	}
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/memory.go

@@ -0,0 +1,286 @@
+// +build linux
+
+package fs
+
+import (
+	"bufio"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strconv"
+	"strings"
+	"syscall"
+
+	"github.com/opencontainers/runc/libcontainer/cgroups"
+	"github.com/opencontainers/runc/libcontainer/configs"
+)
+
+const cgroupKernelMemoryLimit = "memory.kmem.limit_in_bytes"
+
+type MemoryGroup struct {
+}
+
+func (s *MemoryGroup) Name() string {
+	return "memory"
+}
+
+func (s *MemoryGroup) Apply(d *cgroupData) (err error) {
+	path, err := d.path("memory")
+	if err != nil && !cgroups.IsNotFound(err) {
+		return err
+	}
+	if memoryAssigned(d.config) {
+		if path != "" {
+			if err := os.MkdirAll(path, 0755); err != nil {
+				return err
+			}
+		}
+		if d.config.KernelMemory != 0 {
+			if err := EnableKernelMemoryAccounting(path); err != nil {
+				return err
+			}
+		}
+	}
+	defer func() {
+		if err != nil {
+			os.RemoveAll(path)
+		}
+	}()
+
+	// We need to join memory cgroup after set memory limits, because
+	// kmem.limit_in_bytes can only be set when the cgroup is empty.
+	_, err = d.join("memory")
+	if err != nil && !cgroups.IsNotFound(err) {
+		return err
+	}
+	return nil
+}
+
+func EnableKernelMemoryAccounting(path string) error {
+	// Check if kernel memory is enabled
+	// We have to limit the kernel memory here as it won't be accounted at all
+	// until a limit is set on the cgroup and limit cannot be set once the
+	// cgroup has children, or if there are already tasks in the cgroup.
+	for _, i := range []int64{1, -1} {
+		if err := setKernelMemory(path, i); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func setKernelMemory(path string, kernelMemoryLimit int64) error {
+	if path == "" {
+		return fmt.Errorf("no such directory for %s", cgroupKernelMemoryLimit)
+	}
+	if !cgroups.PathExists(filepath.Join(path, cgroupKernelMemoryLimit)) {
+		// kernel memory is not enabled on the system so we should do nothing
+		return nil
+	}
+	if err := ioutil.WriteFile(filepath.Join(path, cgroupKernelMemoryLimit), []byte(strconv.FormatInt(kernelMemoryLimit, 10)), 0700); err != nil {
+		// Check if the error number returned by the syscall is "EBUSY"
+		// The EBUSY signal is returned on attempts to write to the
+		// memory.kmem.limit_in_bytes file if the cgroup has children or
+		// once tasks have been attached to the cgroup
+		if pathErr, ok := err.(*os.PathError); ok {
+			if errNo, ok := pathErr.Err.(syscall.Errno); ok {
+				if errNo == syscall.EBUSY {
+					return fmt.Errorf("failed to set %s, because either tasks have already joined this cgroup or it has children", cgroupKernelMemoryLimit)
+				}
+			}
+		}
+		return fmt.Errorf("failed to write %v to %v: %v", kernelMemoryLimit, cgroupKernelMemoryLimit, err)
+	}
+	return nil
+}
+
+func setMemoryAndSwap(path string, cgroup *configs.Cgroup) error {
+	// When memory and swap memory are both set, we need to handle the cases
+	// for updating container.
+	if cgroup.Resources.Memory != 0 && cgroup.Resources.MemorySwap > 0 {
+		memoryUsage, err := getMemoryData(path, "")
+		if err != nil {
+			return err
+		}
+
+		// When update memory limit, we should adapt the write sequence
+		// for memory and swap memory, so it won't fail because the new
+		// value and the old value don't fit kernel's validation.
+		if memoryUsage.Limit < uint64(cgroup.Resources.MemorySwap) {
+			if err := writeFile(path, "memory.memsw.limit_in_bytes", strconv.FormatInt(cgroup.Resources.MemorySwap, 10)); err != nil {
+				return err
+			}
+			if err := writeFile(path, "memory.limit_in_bytes", strconv.FormatInt(cgroup.Resources.Memory, 10)); err != nil {
+				return err
+			}
+		} else {
+			if err := writeFile(path, "memory.limit_in_bytes", strconv.FormatInt(cgroup.Resources.Memory, 10)); err != nil {
+				return err
+			}
+			if err := writeFile(path, "memory.memsw.limit_in_bytes", strconv.FormatInt(cgroup.Resources.MemorySwap, 10)); err != nil {
+				return err
+			}
+		}
+	} else {
+		if cgroup.Resources.Memory != 0 {
+			if err := writeFile(path, "memory.limit_in_bytes", strconv.FormatInt(cgroup.Resources.Memory, 10)); err != nil {
+				return err
+			}
+		}
+		if cgroup.Resources.MemorySwap > 0 {
+			if err := writeFile(path, "memory.memsw.limit_in_bytes", strconv.FormatInt(cgroup.Resources.MemorySwap, 10)); err != nil {
+				return err
+			}
+		}
+	}
+
+	return nil
+}
+
+func (s *MemoryGroup) Set(path string, cgroup *configs.Cgroup) error {
+	if err := setMemoryAndSwap(path, cgroup); err != nil {
+		return err
+	}
+
+	if cgroup.Resources.KernelMemory != 0 {
+		if err := setKernelMemory(path, cgroup.Resources.KernelMemory); err != nil {
+			return err
+		}
+	}
+
+	if cgroup.Resources.MemoryReservation != 0 {
+		if err := writeFile(path, "memory.soft_limit_in_bytes", strconv.FormatInt(cgroup.Resources.MemoryReservation, 10)); err != nil {
+			return err
+		}
+	}
+
+	if cgroup.Resources.KernelMemoryTCP != 0 {
+		if err := writeFile(path, "memory.kmem.tcp.limit_in_bytes", strconv.FormatInt(cgroup.Resources.KernelMemoryTCP, 10)); err != nil {
+			return err
+		}
+	}
+	if cgroup.Resources.OomKillDisable {
+		if err := writeFile(path, "memory.oom_control", "1"); err != nil {
+			return err
+		}
+	}
+	if cgroup.Resources.MemorySwappiness == nil || int64(*cgroup.Resources.MemorySwappiness) == -1 {
+		return nil
+	} else if int64(*cgroup.Resources.MemorySwappiness) >= 0 && int64(*cgroup.Resources.MemorySwappiness) <= 100 {
+		if err := writeFile(path, "memory.swappiness", strconv.FormatInt(*cgroup.Resources.MemorySwappiness, 10)); err != nil {
+			return err
+		}
+	} else {
+		return fmt.Errorf("invalid value:%d. valid memory swappiness range is 0-100", int64(*cgroup.Resources.MemorySwappiness))
+	}
+
+	return nil
+}
+
+func (s *MemoryGroup) Remove(d *cgroupData) error {
+	return removePath(d.path("memory"))
+}
+
+func (s *MemoryGroup) GetStats(path string, stats *cgroups.Stats) error {
+	// Set stats from memory.stat.
+	statsFile, err := os.Open(filepath.Join(path, "memory.stat"))
+	if err != nil {
+		if os.IsNotExist(err) {
+			return nil
+		}
+		return err
+	}
+	defer statsFile.Close()
+
+	sc := bufio.NewScanner(statsFile)
+	for sc.Scan() {
+		t, v, err := getCgroupParamKeyValue(sc.Text())
+		if err != nil {
+			return fmt.Errorf("failed to parse memory.stat (%q) - %v", sc.Text(), err)
+		}
+		stats.MemoryStats.Stats[t] = v
+	}
+	stats.MemoryStats.Cache = stats.MemoryStats.Stats["cache"]
+
+	memoryUsage, err := getMemoryData(path, "")
+	if err != nil {
+		return err
+	}
+	stats.MemoryStats.Usage = memoryUsage
+	swapUsage, err := getMemoryData(path, "memsw")
+	if err != nil {
+		return err
+	}
+	stats.MemoryStats.SwapUsage = swapUsage
+	kernelUsage, err := getMemoryData(path, "kmem")
+	if err != nil {
+		return err
+	}
+	stats.MemoryStats.KernelUsage = kernelUsage
+	kernelTCPUsage, err := getMemoryData(path, "kmem.tcp")
+	if err != nil {
+		return err
+	}
+	stats.MemoryStats.KernelTCPUsage = kernelTCPUsage
+
+	return nil
+}
+
+func memoryAssigned(cgroup *configs.Cgroup) bool {
+	return cgroup.Resources.Memory != 0 ||
+		cgroup.Resources.MemoryReservation != 0 ||
+		cgroup.Resources.MemorySwap > 0 ||
+		cgroup.Resources.KernelMemory > 0 ||
+		cgroup.Resources.KernelMemoryTCP > 0 ||
+		cgroup.Resources.OomKillDisable ||
+		(cgroup.Resources.MemorySwappiness != nil && *cgroup.Resources.MemorySwappiness != -1)
+}
+
+func getMemoryData(path, name string) (cgroups.MemoryData, error) {
+	memoryData := cgroups.MemoryData{}
+
+	moduleName := "memory"
+	if name != "" {
+		moduleName = strings.Join([]string{"memory", name}, ".")
+	}
+	usage := strings.Join([]string{moduleName, "usage_in_bytes"}, ".")
+	maxUsage := strings.Join([]string{moduleName, "max_usage_in_bytes"}, ".")
+	failcnt := strings.Join([]string{moduleName, "failcnt"}, ".")
+	limit := strings.Join([]string{moduleName, "limit_in_bytes"}, ".")
+
+	value, err := getCgroupParamUint(path, usage)
+	if err != nil {
+		if moduleName != "memory" && os.IsNotExist(err) {
+			return cgroups.MemoryData{}, nil
+		}
+		return cgroups.MemoryData{}, fmt.Errorf("failed to parse %s - %v", usage, err)
+	}
+	memoryData.Usage = value
+	value, err = getCgroupParamUint(path, maxUsage)
+	if err != nil {
+		if moduleName != "memory" && os.IsNotExist(err) {
+			return cgroups.MemoryData{}, nil
+		}
+		return cgroups.MemoryData{}, fmt.Errorf("failed to parse %s - %v", maxUsage, err)
+	}
+	memoryData.MaxUsage = value
+	value, err = getCgroupParamUint(path, failcnt)
+	if err != nil {
+		if moduleName != "memory" && os.IsNotExist(err) {
+			return cgroups.MemoryData{}, nil
+		}
+		return cgroups.MemoryData{}, fmt.Errorf("failed to parse %s - %v", failcnt, err)
+	}
+	memoryData.Failcnt = value
+	value, err = getCgroupParamUint(path, limit)
+	if err != nil {
+		if moduleName != "memory" && os.IsNotExist(err) {
+			return cgroups.MemoryData{}, nil
+		}
+		return cgroups.MemoryData{}, fmt.Errorf("failed to parse %s - %v", limit, err)
+	}
+	memoryData.Limit = value
+
+	return memoryData, nil
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/memory_test.go

@@ -0,0 +1,494 @@
+// +build linux
+
+package fs
+
+import (
+	"strconv"
+	"testing"
+
+	"github.com/opencontainers/runc/libcontainer/cgroups"
+)
+
+const (
+	memoryStatContents = `cache 512
+rss 1024`
+	memoryUsageContents    = "2048\n"
+	memoryMaxUsageContents = "4096\n"
+	memoryFailcnt          = "100\n"
+	memoryLimitContents    = "8192\n"
+)
+
+func TestMemorySetMemory(t *testing.T) {
+	helper := NewCgroupTestUtil("memory", t)
+	defer helper.cleanup()
+
+	const (
+		memoryBefore      = 314572800 // 300M
+		memoryAfter       = 524288000 // 500M
+		reservationBefore = 209715200 // 200M
+		reservationAfter  = 314572800 // 300M
+	)
+
+	helper.writeFileContents(map[string]string{
+		"memory.limit_in_bytes":      strconv.Itoa(memoryBefore),
+		"memory.soft_limit_in_bytes": strconv.Itoa(reservationBefore),
+	})
+
+	helper.CgroupData.config.Resources.Memory = memoryAfter
+	helper.CgroupData.config.Resources.MemoryReservation = reservationAfter
+	memory := &MemoryGroup{}
+	if err := memory.Set(helper.CgroupPath, helper.CgroupData.config); err != nil {
+		t.Fatal(err)
+	}
+
+	value, err := getCgroupParamUint(helper.CgroupPath, "memory.limit_in_bytes")
+	if err != nil {
+		t.Fatalf("Failed to parse memory.limit_in_bytes - %s", err)
+	}
+	if value != memoryAfter {
+		t.Fatal("Got the wrong value, set memory.limit_in_bytes failed.")
+	}
+
+	value, err = getCgroupParamUint(helper.CgroupPath, "memory.soft_limit_in_bytes")
+	if err != nil {
+		t.Fatalf("Failed to parse memory.soft_limit_in_bytes - %s", err)
+	}
+	if value != reservationAfter {
+		t.Fatal("Got the wrong value, set memory.soft_limit_in_bytes failed.")
+	}
+}
+
+func TestMemorySetMemoryswap(t *testing.T) {
+	helper := NewCgroupTestUtil("memory", t)
+	defer helper.cleanup()
+
+	const (
+		memoryswapBefore = 314572800 // 300M
+		memoryswapAfter  = 524288000 // 500M
+	)
+
+	helper.writeFileContents(map[string]string{
+		"memory.memsw.limit_in_bytes": strconv.Itoa(memoryswapBefore),
+	})
+
+	helper.CgroupData.config.Resources.MemorySwap = memoryswapAfter
+	memory := &MemoryGroup{}
+	if err := memory.Set(helper.CgroupPath, helper.CgroupData.config); err != nil {
+		t.Fatal(err)
+	}
+
+	value, err := getCgroupParamUint(helper.CgroupPath, "memory.memsw.limit_in_bytes")
+	if err != nil {
+		t.Fatalf("Failed to parse memory.memsw.limit_in_bytes - %s", err)
+	}
+	if value != memoryswapAfter {
+		t.Fatal("Got the wrong value, set memory.memsw.limit_in_bytes failed.")
+	}
+}
+
+func TestMemorySetNegativeMemoryswap(t *testing.T) {
+	helper := NewCgroupTestUtil("memory", t)
+	defer helper.cleanup()
+
+	const (
+		memoryBefore     = 314572800 // 300M
+		memoryAfter      = 524288000 // 500M
+		memoryswapBefore = 629145600 // 600M
+		memoryswapAfter  = 629145600 // 600M
+	)
+
+	helper.writeFileContents(map[string]string{
+		"memory.limit_in_bytes":       strconv.Itoa(memoryBefore),
+		"memory.memsw.limit_in_bytes": strconv.Itoa(memoryswapBefore),
+	})
+
+	helper.CgroupData.config.Resources.Memory = memoryAfter
+	// Negative value means not change
+	helper.CgroupData.config.Resources.MemorySwap = -1
+	memory := &MemoryGroup{}
+	if err := memory.Set(helper.CgroupPath, helper.CgroupData.config); err != nil {
+		t.Fatal(err)
+	}
+
+	value, err := getCgroupParamUint(helper.CgroupPath, "memory.limit_in_bytes")
+	if err != nil {
+		t.Fatalf("Failed to parse memory.limit_in_bytes - %s", err)
+	}
+	if value != memoryAfter {
+		t.Fatal("Got the wrong value, set memory.limit_in_bytes failed.")
+	}
+
+	value, err = getCgroupParamUint(helper.CgroupPath, "memory.memsw.limit_in_bytes")
+	if err != nil {
+		t.Fatalf("Failed to parse memory.memsw.limit_in_bytes - %s", err)
+	}
+	if value != memoryswapAfter {
+		t.Fatal("Got the wrong value, set memory.memsw.limit_in_bytes failed.")
+	}
+}
+
+func TestMemorySetMemoryLargerThanSwap(t *testing.T) {
+	helper := NewCgroupTestUtil("memory", t)
+	defer helper.cleanup()
+
+	const (
+		memoryBefore     = 314572800 // 300M
+		memoryswapBefore = 524288000 // 500M
+		memoryAfter      = 629145600 // 600M
+		memoryswapAfter  = 838860800 // 800M
+	)
+
+	helper.writeFileContents(map[string]string{
+		"memory.limit_in_bytes":       strconv.Itoa(memoryBefore),
+		"memory.memsw.limit_in_bytes": strconv.Itoa(memoryswapBefore),
+		// Set will call getMemoryData when memory and swap memory are
+		// both set, fake these fields so we don't get error.
+		"memory.usage_in_bytes":     "0",
+		"memory.max_usage_in_bytes": "0",
+		"memory.failcnt":            "0",
+	})
+
+	helper.CgroupData.config.Resources.Memory = memoryAfter
+	helper.CgroupData.config.Resources.MemorySwap = memoryswapAfter
+	memory := &MemoryGroup{}
+	if err := memory.Set(helper.CgroupPath, helper.CgroupData.config); err != nil {
+		t.Fatal(err)
+	}
+
+	value, err := getCgroupParamUint(helper.CgroupPath, "memory.limit_in_bytes")
+	if err != nil {
+		t.Fatalf("Failed to parse memory.limit_in_bytes - %s", err)
+	}
+	if value != memoryAfter {
+		t.Fatal("Got the wrong value, set memory.limit_in_bytes failed.")
+	}
+	value, err = getCgroupParamUint(helper.CgroupPath, "memory.memsw.limit_in_bytes")
+	if err != nil {
+		t.Fatalf("Failed to parse memory.memsw.limit_in_bytes - %s", err)
+	}
+	if value != memoryswapAfter {
+		t.Fatal("Got the wrong value, set memory.memsw.limit_in_bytes failed.")
+	}
+}
+
+func TestMemorySetSwapSmallerThanMemory(t *testing.T) {
+	helper := NewCgroupTestUtil("memory", t)
+	defer helper.cleanup()
+
+	const (
+		memoryBefore     = 629145600 // 600M
+		memoryswapBefore = 838860800 // 800M
+		memoryAfter      = 314572800 // 300M
+		memoryswapAfter  = 524288000 // 500M
+	)
+
+	helper.writeFileContents(map[string]string{
+		"memory.limit_in_bytes":       strconv.Itoa(memoryBefore),
+		"memory.memsw.limit_in_bytes": strconv.Itoa(memoryswapBefore),
+		// Set will call getMemoryData when memory and swap memory are
+		// both set, fake these fields so we don't get error.
+		"memory.usage_in_bytes":     "0",
+		"memory.max_usage_in_bytes": "0",
+		"memory.failcnt":            "0",
+	})
+
+	helper.CgroupData.config.Resources.Memory = memoryAfter
+	helper.CgroupData.config.Resources.MemorySwap = memoryswapAfter
+	memory := &MemoryGroup{}
+	if err := memory.Set(helper.CgroupPath, helper.CgroupData.config); err != nil {
+		t.Fatal(err)
+	}
+
+	value, err := getCgroupParamUint(helper.CgroupPath, "memory.limit_in_bytes")
+	if err != nil {
+		t.Fatalf("Failed to parse memory.limit_in_bytes - %s", err)
+	}
+	if value != memoryAfter {
+		t.Fatal("Got the wrong value, set memory.limit_in_bytes failed.")
+	}
+	value, err = getCgroupParamUint(helper.CgroupPath, "memory.memsw.limit_in_bytes")
+	if err != nil {
+		t.Fatalf("Failed to parse memory.memsw.limit_in_bytes - %s", err)
+	}
+	if value != memoryswapAfter {
+		t.Fatal("Got the wrong value, set memory.memsw.limit_in_bytes failed.")
+	}
+}
+
+func TestMemorySetKernelMemory(t *testing.T) {
+	helper := NewCgroupTestUtil("memory", t)
+	defer helper.cleanup()
+
+	const (
+		kernelMemoryBefore = 314572800 // 300M
+		kernelMemoryAfter  = 524288000 // 500M
+	)
+
+	helper.writeFileContents(map[string]string{
+		"memory.kmem.limit_in_bytes": strconv.Itoa(kernelMemoryBefore),
+	})
+
+	helper.CgroupData.config.Resources.KernelMemory = kernelMemoryAfter
+	memory := &MemoryGroup{}
+	if err := memory.Set(helper.CgroupPath, helper.CgroupData.config); err != nil {
+		t.Fatal(err)
+	}
+
+	value, err := getCgroupParamUint(helper.CgroupPath, "memory.kmem.limit_in_bytes")
+	if err != nil {
+		t.Fatalf("Failed to parse memory.kmem.limit_in_bytes - %s", err)
+	}
+	if value != kernelMemoryAfter {
+		t.Fatal("Got the wrong value, set memory.kmem.limit_in_bytes failed.")
+	}
+}
+
+func TestMemorySetKernelMemoryTCP(t *testing.T) {
+	helper := NewCgroupTestUtil("memory", t)
+	defer helper.cleanup()
+
+	const (
+		kernelMemoryTCPBefore = 314572800 // 300M
+		kernelMemoryTCPAfter  = 524288000 // 500M
+	)
+
+	helper.writeFileContents(map[string]string{
+		"memory.kmem.tcp.limit_in_bytes": strconv.Itoa(kernelMemoryTCPBefore),
+	})
+
+	helper.CgroupData.config.Resources.KernelMemoryTCP = kernelMemoryTCPAfter
+	memory := &MemoryGroup{}
+	if err := memory.Set(helper.CgroupPath, helper.CgroupData.config); err != nil {
+		t.Fatal(err)
+	}
+
+	value, err := getCgroupParamUint(helper.CgroupPath, "memory.kmem.tcp.limit_in_bytes")
+	if err != nil {
+		t.Fatalf("Failed to parse memory.kmem.tcp.limit_in_bytes - %s", err)
+	}
+	if value != kernelMemoryTCPAfter {
+		t.Fatal("Got the wrong value, set memory.kmem.tcp.limit_in_bytes failed.")
+	}
+}
+
+func TestMemorySetMemorySwappinessDefault(t *testing.T) {
+	helper := NewCgroupTestUtil("memory", t)
+	defer helper.cleanup()
+
+	swappinessBefore := 60 //default is 60
+	swappinessAfter := int64(0)
+
+	helper.writeFileContents(map[string]string{
+		"memory.swappiness": strconv.Itoa(swappinessBefore),
+	})
+
+	helper.CgroupData.config.Resources.MemorySwappiness = &swappinessAfter
+	memory := &MemoryGroup{}
+	if err := memory.Set(helper.CgroupPath, helper.CgroupData.config); err != nil {
+		t.Fatal(err)
+	}
+
+	value, err := getCgroupParamUint(helper.CgroupPath, "memory.swappiness")
+	if err != nil {
+		t.Fatalf("Failed to parse memory.swappiness - %s", err)
+	}
+	if int64(value) != swappinessAfter {
+		t.Fatalf("Got the wrong value (%d), set memory.swappiness = %d failed.", value, swappinessAfter)
+	}
+}
+
+func TestMemoryStats(t *testing.T) {
+	helper := NewCgroupTestUtil("memory", t)
+	defer helper.cleanup()
+	helper.writeFileContents(map[string]string{
+		"memory.stat":                     memoryStatContents,
+		"memory.usage_in_bytes":           memoryUsageContents,
+		"memory.limit_in_bytes":           memoryLimitContents,
+		"memory.max_usage_in_bytes":       memoryMaxUsageContents,
+		"memory.failcnt":                  memoryFailcnt,
+		"memory.memsw.usage_in_bytes":     memoryUsageContents,
+		"memory.memsw.max_usage_in_bytes": memoryMaxUsageContents,
+		"memory.memsw.failcnt":            memoryFailcnt,
+		"memory.memsw.limit_in_bytes":     memoryLimitContents,
+		"memory.kmem.usage_in_bytes":      memoryUsageContents,
+		"memory.kmem.max_usage_in_bytes":  memoryMaxUsageContents,
+		"memory.kmem.failcnt":             memoryFailcnt,
+		"memory.kmem.limit_in_bytes":      memoryLimitContents,
+	})
+
+	memory := &MemoryGroup{}
+	actualStats := *cgroups.NewStats()
+	err := memory.GetStats(helper.CgroupPath, &actualStats)
+	if err != nil {
+		t.Fatal(err)
+	}
+	expectedStats := cgroups.MemoryStats{Cache: 512, Usage: cgroups.MemoryData{Usage: 2048, MaxUsage: 4096, Failcnt: 100, Limit: 8192}, SwapUsage: cgroups.MemoryData{Usage: 2048, MaxUsage: 4096, Failcnt: 100, Limit: 8192}, KernelUsage: cgroups.MemoryData{Usage: 2048, MaxUsage: 4096, Failcnt: 100, Limit: 8192}, Stats: map[string]uint64{"cache": 512, "rss": 1024}}
+	expectMemoryStatEquals(t, expectedStats, actualStats.MemoryStats)
+}
+
+func TestMemoryStatsNoStatFile(t *testing.T) {
+	helper := NewCgroupTestUtil("memory", t)
+	defer helper.cleanup()
+	helper.writeFileContents(map[string]string{
+		"memory.usage_in_bytes":     memoryUsageContents,
+		"memory.max_usage_in_bytes": memoryMaxUsageContents,
+		"memory.limit_in_bytes":     memoryLimitContents,
+	})
+
+	memory := &MemoryGroup{}
+	actualStats := *cgroups.NewStats()
+	err := memory.GetStats(helper.CgroupPath, &actualStats)
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestMemoryStatsNoUsageFile(t *testing.T) {
+	helper := NewCgroupTestUtil("memory", t)
+	defer helper.cleanup()
+	helper.writeFileContents(map[string]string{
+		"memory.stat":               memoryStatContents,
+		"memory.max_usage_in_bytes": memoryMaxUsageContents,
+		"memory.limit_in_bytes":     memoryLimitContents,
+	})
+
+	memory := &MemoryGroup{}
+	actualStats := *cgroups.NewStats()
+	err := memory.GetStats(helper.CgroupPath, &actualStats)
+	if err == nil {
+		t.Fatal("Expected failure")
+	}
+}
+
+func TestMemoryStatsNoMaxUsageFile(t *testing.T) {
+	helper := NewCgroupTestUtil("memory", t)
+	defer helper.cleanup()
+	helper.writeFileContents(map[string]string{
+		"memory.stat":           memoryStatContents,
+		"memory.usage_in_bytes": memoryUsageContents,
+		"memory.limit_in_bytes": memoryLimitContents,
+	})
+
+	memory := &MemoryGroup{}
+	actualStats := *cgroups.NewStats()
+	err := memory.GetStats(helper.CgroupPath, &actualStats)
+	if err == nil {
+		t.Fatal("Expected failure")
+	}
+}
+
+func TestMemoryStatsNoLimitInBytesFile(t *testing.T) {
+	helper := NewCgroupTestUtil("memory", t)
+	defer helper.cleanup()
+	helper.writeFileContents(map[string]string{
+		"memory.stat":               memoryStatContents,
+		"memory.usage_in_bytes":     memoryUsageContents,
+		"memory.max_usage_in_bytes": memoryMaxUsageContents,
+	})
+
+	memory := &MemoryGroup{}
+	actualStats := *cgroups.NewStats()
+	err := memory.GetStats(helper.CgroupPath, &actualStats)
+	if err == nil {
+		t.Fatal("Expected failure")
+	}
+}
+
+func TestMemoryStatsBadStatFile(t *testing.T) {
+	helper := NewCgroupTestUtil("memory", t)
+	defer helper.cleanup()
+	helper.writeFileContents(map[string]string{
+		"memory.stat":               "rss rss",
+		"memory.usage_in_bytes":     memoryUsageContents,
+		"memory.max_usage_in_bytes": memoryMaxUsageContents,
+		"memory.limit_in_bytes":     memoryLimitContents,
+	})
+
+	memory := &MemoryGroup{}
+	actualStats := *cgroups.NewStats()
+	err := memory.GetStats(helper.CgroupPath, &actualStats)
+	if err == nil {
+		t.Fatal("Expected failure")
+	}
+}
+
+func TestMemoryStatsBadUsageFile(t *testing.T) {
+	helper := NewCgroupTestUtil("memory", t)
+	defer helper.cleanup()
+	helper.writeFileContents(map[string]string{
+		"memory.stat":               memoryStatContents,
+		"memory.usage_in_bytes":     "bad",
+		"memory.max_usage_in_bytes": memoryMaxUsageContents,
+		"memory.limit_in_bytes":     memoryLimitContents,
+	})
+
+	memory := &MemoryGroup{}
+	actualStats := *cgroups.NewStats()
+	err := memory.GetStats(helper.CgroupPath, &actualStats)
+	if err == nil {
+		t.Fatal("Expected failure")
+	}
+}
+
+func TestMemoryStatsBadMaxUsageFile(t *testing.T) {
+	helper := NewCgroupTestUtil("memory", t)
+	defer helper.cleanup()
+	helper.writeFileContents(map[string]string{
+		"memory.stat":               memoryStatContents,
+		"memory.usage_in_bytes":     memoryUsageContents,
+		"memory.max_usage_in_bytes": "bad",
+		"memory.limit_in_bytes":     memoryLimitContents,
+	})
+
+	memory := &MemoryGroup{}
+	actualStats := *cgroups.NewStats()
+	err := memory.GetStats(helper.CgroupPath, &actualStats)
+	if err == nil {
+		t.Fatal("Expected failure")
+	}
+}
+
+func TestMemoryStatsBadLimitInBytesFile(t *testing.T) {
+	helper := NewCgroupTestUtil("memory", t)
+	defer helper.cleanup()
+	helper.writeFileContents(map[string]string{
+		"memory.stat":               memoryStatContents,
+		"memory.usage_in_bytes":     memoryUsageContents,
+		"memory.max_usage_in_bytes": memoryMaxUsageContents,
+		"memory.limit_in_bytes":     "bad",
+	})
+
+	memory := &MemoryGroup{}
+	actualStats := *cgroups.NewStats()
+	err := memory.GetStats(helper.CgroupPath, &actualStats)
+	if err == nil {
+		t.Fatal("Expected failure")
+	}
+}
+
+func TestMemorySetOomControl(t *testing.T) {
+	helper := NewCgroupTestUtil("memory", t)
+	defer helper.cleanup()
+
+	const (
+		oomKillDisable = 1 // disable oom killer, default is 0
+	)
+
+	helper.writeFileContents(map[string]string{
+		"memory.oom_control": strconv.Itoa(oomKillDisable),
+	})
+
+	memory := &MemoryGroup{}
+	if err := memory.Set(helper.CgroupPath, helper.CgroupData.config); err != nil {
+		t.Fatal(err)
+	}
+
+	value, err := getCgroupParamUint(helper.CgroupPath, "memory.oom_control")
+	if err != nil {
+		t.Fatalf("Failed to parse memory.oom_control - %s", err)
+	}
+
+	if value != oomKillDisable {
+		t.Fatalf("Got the wrong value, set memory.oom_control failed.")
+	}
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/name.go

@@ -0,0 +1,40 @@
+// +build linux
+
+package fs
+
+import (
+	"github.com/opencontainers/runc/libcontainer/cgroups"
+	"github.com/opencontainers/runc/libcontainer/configs"
+)
+
+type NameGroup struct {
+	GroupName string
+	Join      bool
+}
+
+func (s *NameGroup) Name() string {
+	return s.GroupName
+}
+
+func (s *NameGroup) Apply(d *cgroupData) error {
+	if s.Join {
+		// ignore errors if the named cgroup does not exist
+		d.join(s.GroupName)
+	}
+	return nil
+}
+
+func (s *NameGroup) Set(path string, cgroup *configs.Cgroup) error {
+	return nil
+}
+
+func (s *NameGroup) Remove(d *cgroupData) error {
+	if s.Join {
+		removePath(d.path(s.GroupName))
+	}
+	return nil
+}
+
+func (s *NameGroup) GetStats(path string, stats *cgroups.Stats) error {
+	return nil
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/net_cls.go

@@ -0,0 +1,43 @@
+// +build linux
+
+package fs
+
+import (
+	"strconv"
+
+	"github.com/opencontainers/runc/libcontainer/cgroups"
+	"github.com/opencontainers/runc/libcontainer/configs"
+)
+
+type NetClsGroup struct {
+}
+
+func (s *NetClsGroup) Name() string {
+	return "net_cls"
+}
+
+func (s *NetClsGroup) Apply(d *cgroupData) error {
+	_, err := d.join("net_cls")
+	if err != nil && !cgroups.IsNotFound(err) {
+		return err
+	}
+	return nil
+}
+
+func (s *NetClsGroup) Set(path string, cgroup *configs.Cgroup) error {
+	if cgroup.Resources.NetClsClassid != 0 {
+		if err := writeFile(path, "net_cls.classid", strconv.FormatUint(uint64(cgroup.Resources.NetClsClassid), 10)); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (s *NetClsGroup) Remove(d *cgroupData) error {
+	return removePath(d.path("net_cls"))
+}
+
+func (s *NetClsGroup) GetStats(path string, stats *cgroups.Stats) error {
+	return nil
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/net_cls_test.go

@@ -0,0 +1,39 @@
+// +build linux
+
+package fs
+
+import (
+	"strconv"
+	"testing"
+)
+
+const (
+	classidBefore = 0x100002
+	classidAfter  = 0x100001
+)
+
+func TestNetClsSetClassid(t *testing.T) {
+	helper := NewCgroupTestUtil("net_cls", t)
+	defer helper.cleanup()
+
+	helper.writeFileContents(map[string]string{
+		"net_cls.classid": strconv.FormatUint(classidBefore, 10),
+	})
+
+	helper.CgroupData.config.Resources.NetClsClassid = classidAfter
+	netcls := &NetClsGroup{}
+	if err := netcls.Set(helper.CgroupPath, helper.CgroupData.config); err != nil {
+		t.Fatal(err)
+	}
+
+	// As we are in mock environment, we can't get correct value of classid from
+	// net_cls.classid.
+	// So. we just judge if we successfully write classid into file
+	value, err := getCgroupParamUint(helper.CgroupPath, "net_cls.classid")
+	if err != nil {
+		t.Fatalf("Failed to parse net_cls.classid - %s", err)
+	}
+	if value != classidAfter {
+		t.Fatal("Got the wrong value, set net_cls.classid failed.")
+	}
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/net_prio.go

@@ -0,0 +1,41 @@
+// +build linux
+
+package fs
+
+import (
+	"github.com/opencontainers/runc/libcontainer/cgroups"
+	"github.com/opencontainers/runc/libcontainer/configs"
+)
+
+type NetPrioGroup struct {
+}
+
+func (s *NetPrioGroup) Name() string {
+	return "net_prio"
+}
+
+func (s *NetPrioGroup) Apply(d *cgroupData) error {
+	_, err := d.join("net_prio")
+	if err != nil && !cgroups.IsNotFound(err) {
+		return err
+	}
+	return nil
+}
+
+func (s *NetPrioGroup) Set(path string, cgroup *configs.Cgroup) error {
+	for _, prioMap := range cgroup.Resources.NetPrioIfpriomap {
+		if err := writeFile(path, "net_prio.ifpriomap", prioMap.CgroupString()); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (s *NetPrioGroup) Remove(d *cgroupData) error {
+	return removePath(d.path("net_prio"))
+}
+
+func (s *NetPrioGroup) GetStats(path string, stats *cgroups.Stats) error {
+	return nil
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/net_prio_test.go

@@ -0,0 +1,38 @@
+// +build linux
+
+package fs
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/opencontainers/runc/libcontainer/configs"
+)
+
+var (
+	prioMap = []*configs.IfPrioMap{
+		{
+			Interface: "test",
+			Priority:  5,
+		},
+	}
+)
+
+func TestNetPrioSetIfPrio(t *testing.T) {
+	helper := NewCgroupTestUtil("net_prio", t)
+	defer helper.cleanup()
+
+	helper.CgroupData.config.Resources.NetPrioIfpriomap = prioMap
+	netPrio := &NetPrioGroup{}
+	if err := netPrio.Set(helper.CgroupPath, helper.CgroupData.config); err != nil {
+		t.Fatal(err)
+	}
+
+	value, err := getCgroupParamString(helper.CgroupPath, "net_prio.ifpriomap")
+	if err != nil {
+		t.Fatalf("Failed to parse net_prio.ifpriomap - %s", err)
+	}
+	if !strings.Contains(value, "test 5") {
+		t.Fatal("Got the wrong value, set net_prio.ifpriomap failed.")
+	}
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/perf_event.go

@@ -0,0 +1,35 @@
+// +build linux
+
+package fs
+
+import (
+	"github.com/opencontainers/runc/libcontainer/cgroups"
+	"github.com/opencontainers/runc/libcontainer/configs"
+)
+
+type PerfEventGroup struct {
+}
+
+func (s *PerfEventGroup) Name() string {
+	return "perf_event"
+}
+
+func (s *PerfEventGroup) Apply(d *cgroupData) error {
+	// we just want to join this group even though we don't set anything
+	if _, err := d.join("perf_event"); err != nil && !cgroups.IsNotFound(err) {
+		return err
+	}
+	return nil
+}
+
+func (s *PerfEventGroup) Set(path string, cgroup *configs.Cgroup) error {
+	return nil
+}
+
+func (s *PerfEventGroup) Remove(d *cgroupData) error {
+	return removePath(d.path("perf_event"))
+}
+
+func (s *PerfEventGroup) GetStats(path string, stats *cgroups.Stats) error {
+	return nil
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/pids.go

@@ -0,0 +1,73 @@
+// +build linux
+
+package fs
+
+import (
+	"fmt"
+	"path/filepath"
+	"strconv"
+
+	"github.com/opencontainers/runc/libcontainer/cgroups"
+	"github.com/opencontainers/runc/libcontainer/configs"
+)
+
+type PidsGroup struct {
+}
+
+func (s *PidsGroup) Name() string {
+	return "pids"
+}
+
+func (s *PidsGroup) Apply(d *cgroupData) error {
+	_, err := d.join("pids")
+	if err != nil && !cgroups.IsNotFound(err) {
+		return err
+	}
+	return nil
+}
+
+func (s *PidsGroup) Set(path string, cgroup *configs.Cgroup) error {
+	if cgroup.Resources.PidsLimit != 0 {
+		// "max" is the fallback value.
+		limit := "max"
+
+		if cgroup.Resources.PidsLimit > 0 {
+			limit = strconv.FormatInt(cgroup.Resources.PidsLimit, 10)
+		}
+
+		if err := writeFile(path, "pids.max", limit); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (s *PidsGroup) Remove(d *cgroupData) error {
+	return removePath(d.path("pids"))
+}
+
+func (s *PidsGroup) GetStats(path string, stats *cgroups.Stats) error {
+	current, err := getCgroupParamUint(path, "pids.current")
+	if err != nil {
+		return fmt.Errorf("failed to parse pids.current - %s", err)
+	}
+
+	maxString, err := getCgroupParamString(path, "pids.max")
+	if err != nil {
+		return fmt.Errorf("failed to parse pids.max - %s", err)
+	}
+
+	// Default if pids.max == "max" is 0 -- which represents "no limit".
+	var max uint64
+	if maxString != "max" {
+		max, err = parseUint(maxString, 10, 64)
+		if err != nil {
+			return fmt.Errorf("failed to parse pids.max - unable to parse %q as a uint from Cgroup file %q", maxString, filepath.Join(path, "pids.max"))
+		}
+	}
+
+	stats.PidsStats.Current = current
+	stats.PidsStats.Limit = max
+	return nil
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/pids_test.go

@@ -0,0 +1,111 @@
+// +build linux
+
+package fs
+
+import (
+	"strconv"
+	"testing"
+
+	"github.com/opencontainers/runc/libcontainer/cgroups"
+)
+
+const (
+	maxUnlimited = -1
+	maxLimited   = 1024
+)
+
+func TestPidsSetMax(t *testing.T) {
+	helper := NewCgroupTestUtil("pids", t)
+	defer helper.cleanup()
+
+	helper.writeFileContents(map[string]string{
+		"pids.max": "max",
+	})
+
+	helper.CgroupData.config.Resources.PidsLimit = maxLimited
+	pids := &PidsGroup{}
+	if err := pids.Set(helper.CgroupPath, helper.CgroupData.config); err != nil {
+		t.Fatal(err)
+	}
+
+	value, err := getCgroupParamUint(helper.CgroupPath, "pids.max")
+	if err != nil {
+		t.Fatalf("Failed to parse pids.max - %s", err)
+	}
+
+	if value != maxLimited {
+		t.Fatalf("Expected %d, got %d for setting pids.max - limited", maxLimited, value)
+	}
+}
+
+func TestPidsSetUnlimited(t *testing.T) {
+	helper := NewCgroupTestUtil("pids", t)
+	defer helper.cleanup()
+
+	helper.writeFileContents(map[string]string{
+		"pids.max": strconv.Itoa(maxLimited),
+	})
+
+	helper.CgroupData.config.Resources.PidsLimit = maxUnlimited
+	pids := &PidsGroup{}
+	if err := pids.Set(helper.CgroupPath, helper.CgroupData.config); err != nil {
+		t.Fatal(err)
+	}
+
+	value, err := getCgroupParamString(helper.CgroupPath, "pids.max")
+	if err != nil {
+		t.Fatalf("Failed to parse pids.max - %s", err)
+	}
+
+	if value != "max" {
+		t.Fatalf("Expected %s, got %s for setting pids.max - unlimited", "max", value)
+	}
+}
+
+func TestPidsStats(t *testing.T) {
+	helper := NewCgroupTestUtil("pids", t)
+	defer helper.cleanup()
+
+	helper.writeFileContents(map[string]string{
+		"pids.current": strconv.Itoa(1337),
+		"pids.max":     strconv.Itoa(maxLimited),
+	})
+
+	pids := &PidsGroup{}
+	stats := *cgroups.NewStats()
+	if err := pids.GetStats(helper.CgroupPath, &stats); err != nil {
+		t.Fatal(err)
+	}
+
+	if stats.PidsStats.Current != 1337 {
+		t.Fatalf("Expected %d, got %d for pids.current", 1337, stats.PidsStats.Current)
+	}
+
+	if stats.PidsStats.Limit != maxLimited {
+		t.Fatalf("Expected %d, got %d for pids.max", maxLimited, stats.PidsStats.Limit)
+	}
+}
+
+func TestPidsStatsUnlimited(t *testing.T) {
+	helper := NewCgroupTestUtil("pids", t)
+	defer helper.cleanup()
+
+	helper.writeFileContents(map[string]string{
+		"pids.current": strconv.Itoa(4096),
+		"pids.max":     "max",
+	})
+
+	pids := &PidsGroup{}
+	stats := *cgroups.NewStats()
+	if err := pids.GetStats(helper.CgroupPath, &stats); err != nil {
+		t.Fatal(err)
+	}
+
+	if stats.PidsStats.Current != 4096 {
+		t.Fatalf("Expected %d, got %d for pids.current", 4096, stats.PidsStats.Current)
+	}
+
+	if stats.PidsStats.Limit != 0 {
+		t.Fatalf("Expected %d, got %d for pids.max", 0, stats.PidsStats.Limit)
+	}
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/stats_util_test.go

@@ -0,0 +1,117 @@
+// +build linux
+
+package fs
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/Sirupsen/logrus"
+	"github.com/opencontainers/runc/libcontainer/cgroups"
+)
+
+func blkioStatEntryEquals(expected, actual []cgroups.BlkioStatEntry) error {
+	if len(expected) != len(actual) {
+		return fmt.Errorf("blkioStatEntries length do not match")
+	}
+	for i, expValue := range expected {
+		actValue := actual[i]
+		if expValue != actValue {
+			return fmt.Errorf("Expected blkio stat entry %v but found %v", expValue, actValue)
+		}
+	}
+	return nil
+}
+
+func expectBlkioStatsEquals(t *testing.T, expected, actual cgroups.BlkioStats) {
+	if err := blkioStatEntryEquals(expected.IoServiceBytesRecursive, actual.IoServiceBytesRecursive); err != nil {
+		logrus.Printf("blkio IoServiceBytesRecursive do not match - %s\n", err)
+		t.Fail()
+	}
+
+	if err := blkioStatEntryEquals(expected.IoServicedRecursive, actual.IoServicedRecursive); err != nil {
+		logrus.Printf("blkio IoServicedRecursive do not match - %s\n", err)
+		t.Fail()
+	}
+
+	if err := blkioStatEntryEquals(expected.IoQueuedRecursive, actual.IoQueuedRecursive); err != nil {
+		logrus.Printf("blkio IoQueuedRecursive do not match - %s\n", err)
+		t.Fail()
+	}
+
+	if err := blkioStatEntryEquals(expected.SectorsRecursive, actual.SectorsRecursive); err != nil {
+		logrus.Printf("blkio SectorsRecursive do not match - %s\n", err)
+		t.Fail()
+	}
+
+	if err := blkioStatEntryEquals(expected.IoServiceTimeRecursive, actual.IoServiceTimeRecursive); err != nil {
+		logrus.Printf("blkio IoServiceTimeRecursive do not match - %s\n", err)
+		t.Fail()
+	}
+
+	if err := blkioStatEntryEquals(expected.IoWaitTimeRecursive, actual.IoWaitTimeRecursive); err != nil {
+		logrus.Printf("blkio IoWaitTimeRecursive do not match - %s\n", err)
+		t.Fail()
+	}
+
+	if err := blkioStatEntryEquals(expected.IoMergedRecursive, actual.IoMergedRecursive); err != nil {
+		logrus.Printf("blkio IoMergedRecursive do not match - %v vs %v\n", expected.IoMergedRecursive, actual.IoMergedRecursive)
+		t.Fail()
+	}
+
+	if err := blkioStatEntryEquals(expected.IoTimeRecursive, actual.IoTimeRecursive); err != nil {
+		logrus.Printf("blkio IoTimeRecursive do not match - %s\n", err)
+		t.Fail()
+	}
+}
+
+func expectThrottlingDataEquals(t *testing.T, expected, actual cgroups.ThrottlingData) {
+	if expected != actual {
+		logrus.Printf("Expected throttling data %v but found %v\n", expected, actual)
+		t.Fail()
+	}
+}
+
+func expectHugetlbStatEquals(t *testing.T, expected, actual cgroups.HugetlbStats) {
+	if expected != actual {
+		logrus.Printf("Expected hugetlb stats %v but found %v\n", expected, actual)
+		t.Fail()
+	}
+}
+
+func expectMemoryStatEquals(t *testing.T, expected, actual cgroups.MemoryStats) {
+	expectMemoryDataEquals(t, expected.Usage, actual.Usage)
+	expectMemoryDataEquals(t, expected.SwapUsage, actual.SwapUsage)
+	expectMemoryDataEquals(t, expected.KernelUsage, actual.KernelUsage)
+
+	for key, expValue := range expected.Stats {
+		actValue, ok := actual.Stats[key]
+		if !ok {
+			logrus.Printf("Expected memory stat key %s not found\n", key)
+			t.Fail()
+		}
+		if expValue != actValue {
+			logrus.Printf("Expected memory stat value %d but found %d\n", expValue, actValue)
+			t.Fail()
+		}
+	}
+}
+
+func expectMemoryDataEquals(t *testing.T, expected, actual cgroups.MemoryData) {
+	if expected.Usage != actual.Usage {
+		logrus.Printf("Expected memory usage %d but found %d\n", expected.Usage, actual.Usage)
+		t.Fail()
+	}
+	if expected.MaxUsage != actual.MaxUsage {
+		logrus.Printf("Expected memory max usage %d but found %d\n", expected.MaxUsage, actual.MaxUsage)
+		t.Fail()
+	}
+	if expected.Failcnt != actual.Failcnt {
+		logrus.Printf("Expected memory failcnt %d but found %d\n", expected.Failcnt, actual.Failcnt)
+		t.Fail()
+	}
+	if expected.Limit != actual.Limit {
+		logrus.Printf("Expected memory limit %d but found %d\n", expected.Limit, actual.Limit)
+		t.Fail()
+	}
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/util_test.go

@@ -0,0 +1,67 @@
+// +build linux
+
+/*
+Utility for testing cgroup operations.
+
+Creates a mock of the cgroup filesystem for the duration of the test.
+*/
+package fs
+
+import (
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/opencontainers/runc/libcontainer/configs"
+)
+
+type cgroupTestUtil struct {
+	// cgroup data to use in tests.
+	CgroupData *cgroupData
+
+	// Path to the mock cgroup directory.
+	CgroupPath string
+
+	// Temporary directory to store mock cgroup filesystem.
+	tempDir string
+	t       *testing.T
+}
+
+// Creates a new test util for the specified subsystem
+func NewCgroupTestUtil(subsystem string, t *testing.T) *cgroupTestUtil {
+	d := &cgroupData{
+		config: &configs.Cgroup{},
+	}
+	d.config.Resources = &configs.Resources{}
+	tempDir, err := ioutil.TempDir("", "cgroup_test")
+	if err != nil {
+		t.Fatal(err)
+	}
+	d.root = tempDir
+	testCgroupPath := filepath.Join(d.root, subsystem)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Ensure the full mock cgroup path exists.
+	err = os.MkdirAll(testCgroupPath, 0755)
+	if err != nil {
+		t.Fatal(err)
+	}
+	return &cgroupTestUtil{CgroupData: d, CgroupPath: testCgroupPath, tempDir: tempDir, t: t}
+}
+
+func (c *cgroupTestUtil) cleanup() {
+	os.RemoveAll(c.tempDir)
+}
+
+// Write the specified contents on the mock of the specified cgroup files.
+func (c *cgroupTestUtil) writeFileContents(fileContents map[string]string) {
+	for file, contents := range fileContents {
+		err := writeFile(c.CgroupPath, file, contents)
+		if err != nil {
+			c.t.Fatal(err)
+		}
+	}
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/utils.go

@@ -0,0 +1,78 @@
+// +build linux
+
+package fs
+
+import (
+	"errors"
+	"fmt"
+	"io/ioutil"
+	"path/filepath"
+	"strconv"
+	"strings"
+)
+
+var (
+	ErrNotValidFormat = errors.New("line is not a valid key value format")
+)
+
+// Saturates negative values at zero and returns a uint64.
+// Due to kernel bugs, some of the memory cgroup stats can be negative.
+func parseUint(s string, base, bitSize int) (uint64, error) {
+	value, err := strconv.ParseUint(s, base, bitSize)
+	if err != nil {
+		intValue, intErr := strconv.ParseInt(s, base, bitSize)
+		// 1. Handle negative values greater than MinInt64 (and)
+		// 2. Handle negative values lesser than MinInt64
+		if intErr == nil && intValue < 0 {
+			return 0, nil
+		} else if intErr != nil && intErr.(*strconv.NumError).Err == strconv.ErrRange && intValue < 0 {
+			return 0, nil
+		}
+
+		return value, err
+	}
+
+	return value, nil
+}
+
+// Parses a cgroup param and returns as name, value
+//  i.e. "io_service_bytes 1234" will return as io_service_bytes, 1234
+func getCgroupParamKeyValue(t string) (string, uint64, error) {
+	parts := strings.Fields(t)
+	switch len(parts) {
+	case 2:
+		value, err := parseUint(parts[1], 10, 64)
+		if err != nil {
+			return "", 0, fmt.Errorf("unable to convert param value (%q) to uint64: %v", parts[1], err)
+		}
+
+		return parts[0], value, nil
+	default:
+		return "", 0, ErrNotValidFormat
+	}
+}
+
+// Gets a single uint64 value from the specified cgroup file.
+func getCgroupParamUint(cgroupPath, cgroupFile string) (uint64, error) {
+	fileName := filepath.Join(cgroupPath, cgroupFile)
+	contents, err := ioutil.ReadFile(fileName)
+	if err != nil {
+		return 0, err
+	}
+
+	res, err := parseUint(strings.TrimSpace(string(contents)), 10, 64)
+	if err != nil {
+		return res, fmt.Errorf("unable to parse %q as a uint from Cgroup file %q", string(contents), fileName)
+	}
+	return res, nil
+}
+
+// Gets a string value from the specified cgroup file
+func getCgroupParamString(cgroupPath, cgroupFile string) (string, error) {
+	contents, err := ioutil.ReadFile(filepath.Join(cgroupPath, cgroupFile))
+	if err != nil {
+		return "", err
+	}
+
+	return strings.TrimSpace(string(contents)), nil
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/utils_test.go

@@ -0,0 +1,97 @@
+// +build linux
+
+package fs
+
+import (
+	"io/ioutil"
+	"math"
+	"os"
+	"path/filepath"
+	"strconv"
+	"testing"
+)
+
+const (
+	cgroupFile  = "cgroup.file"
+	floatValue  = 2048.0
+	floatString = "2048"
+)
+
+func TestGetCgroupParamsInt(t *testing.T) {
+	// Setup tempdir.
+	tempDir, err := ioutil.TempDir("", "cgroup_utils_test")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(tempDir)
+	tempFile := filepath.Join(tempDir, cgroupFile)
+
+	// Success.
+	err = ioutil.WriteFile(tempFile, []byte(floatString), 0755)
+	if err != nil {
+		t.Fatal(err)
+	}
+	value, err := getCgroupParamUint(tempDir, cgroupFile)
+	if err != nil {
+		t.Fatal(err)
+	} else if value != floatValue {
+		t.Fatalf("Expected %d to equal %f", value, floatValue)
+	}
+
+	// Success with new line.
+	err = ioutil.WriteFile(tempFile, []byte(floatString+"\n"), 0755)
+	if err != nil {
+		t.Fatal(err)
+	}
+	value, err = getCgroupParamUint(tempDir, cgroupFile)
+	if err != nil {
+		t.Fatal(err)
+	} else if value != floatValue {
+		t.Fatalf("Expected %d to equal %f", value, floatValue)
+	}
+
+	// Success with negative values
+	err = ioutil.WriteFile(tempFile, []byte("-12345"), 0755)
+	if err != nil {
+		t.Fatal(err)
+	}
+	value, err = getCgroupParamUint(tempDir, cgroupFile)
+	if err != nil {
+		t.Fatal(err)
+	} else if value != 0 {
+		t.Fatalf("Expected %d to equal %d", value, 0)
+	}
+
+	// Success with negative values lesser than min int64
+	s := strconv.FormatFloat(math.MinInt64, 'f', -1, 64)
+	err = ioutil.WriteFile(tempFile, []byte(s), 0755)
+	if err != nil {
+		t.Fatal(err)
+	}
+	value, err = getCgroupParamUint(tempDir, cgroupFile)
+	if err != nil {
+		t.Fatal(err)
+	} else if value != 0 {
+		t.Fatalf("Expected %d to equal %d", value, 0)
+	}
+
+	// Not a float.
+	err = ioutil.WriteFile(tempFile, []byte("not-a-float"), 0755)
+	if err != nil {
+		t.Fatal(err)
+	}
+	_, err = getCgroupParamUint(tempDir, cgroupFile)
+	if err == nil {
+		t.Fatal("Expecting error, got none")
+	}
+
+	// Unknown file.
+	err = os.Remove(tempFile)
+	if err != nil {
+		t.Fatal(err)
+	}
+	_, err = getCgroupParamUint(tempDir, cgroupFile)
+	if err == nil {
+		t.Fatal("Expecting error, got none")
+	}
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/stats.go

@@ -0,0 +1,106 @@
+// +build linux
+
+package cgroups
+
+type ThrottlingData struct {
+	// Number of periods with throttling active
+	Periods uint64 `json:"periods,omitempty"`
+	// Number of periods when the container hit its throttling limit.
+	ThrottledPeriods uint64 `json:"throttled_periods,omitempty"`
+	// Aggregate time the container was throttled for in nanoseconds.
+	ThrottledTime uint64 `json:"throttled_time,omitempty"`
+}
+
+// CpuUsage denotes the usage of a CPU.
+// All CPU stats are aggregate since container inception.
+type CpuUsage struct {
+	// Total CPU time consumed.
+	// Units: nanoseconds.
+	TotalUsage uint64 `json:"total_usage,omitempty"`
+	// Total CPU time consumed per core.
+	// Units: nanoseconds.
+	PercpuUsage []uint64 `json:"percpu_usage,omitempty"`
+	// Time spent by tasks of the cgroup in kernel mode.
+	// Units: nanoseconds.
+	UsageInKernelmode uint64 `json:"usage_in_kernelmode"`
+	// Time spent by tasks of the cgroup in user mode.
+	// Units: nanoseconds.
+	UsageInUsermode uint64 `json:"usage_in_usermode"`
+}
+
+type CpuStats struct {
+	CpuUsage       CpuUsage       `json:"cpu_usage,omitempty"`
+	ThrottlingData ThrottlingData `json:"throttling_data,omitempty"`
+}
+
+type MemoryData struct {
+	Usage    uint64 `json:"usage,omitempty"`
+	MaxUsage uint64 `json:"max_usage,omitempty"`
+	Failcnt  uint64 `json:"failcnt"`
+	Limit    uint64 `json:"limit"`
+}
+
+type MemoryStats struct {
+	// memory used for cache
+	Cache uint64 `json:"cache,omitempty"`
+	// usage of memory
+	Usage MemoryData `json:"usage,omitempty"`
+	// usage of memory + swap
+	SwapUsage MemoryData `json:"swap_usage,omitempty"`
+	// usage of kernel memory
+	KernelUsage MemoryData `json:"kernel_usage,omitempty"`
+	// usage of kernel TCP memory
+	KernelTCPUsage MemoryData `json:"kernel_tcp_usage,omitempty"`
+
+	Stats map[string]uint64 `json:"stats,omitempty"`
+}
+
+type PidsStats struct {
+	// number of pids in the cgroup
+	Current uint64 `json:"current,omitempty"`
+	// active pids hard limit
+	Limit uint64 `json:"limit,omitempty"`
+}
+
+type BlkioStatEntry struct {
+	Major uint64 `json:"major,omitempty"`
+	Minor uint64 `json:"minor,omitempty"`
+	Op    string `json:"op,omitempty"`
+	Value uint64 `json:"value,omitempty"`
+}
+
+type BlkioStats struct {
+	// number of bytes tranferred to and from the block device
+	IoServiceBytesRecursive []BlkioStatEntry `json:"io_service_bytes_recursive,omitempty"`
+	IoServicedRecursive     []BlkioStatEntry `json:"io_serviced_recursive,omitempty"`
+	IoQueuedRecursive       []BlkioStatEntry `json:"io_queue_recursive,omitempty"`
+	IoServiceTimeRecursive  []BlkioStatEntry `json:"io_service_time_recursive,omitempty"`
+	IoWaitTimeRecursive     []BlkioStatEntry `json:"io_wait_time_recursive,omitempty"`
+	IoMergedRecursive       []BlkioStatEntry `json:"io_merged_recursive,omitempty"`
+	IoTimeRecursive         []BlkioStatEntry `json:"io_time_recursive,omitempty"`
+	SectorsRecursive        []BlkioStatEntry `json:"sectors_recursive,omitempty"`
+}
+
+type HugetlbStats struct {
+	// current res_counter usage for hugetlb
+	Usage uint64 `json:"usage,omitempty"`
+	// maximum usage ever recorded.
+	MaxUsage uint64 `json:"max_usage,omitempty"`
+	// number of times hugetlb usage allocation failure.
+	Failcnt uint64 `json:"failcnt"`
+}
+
+type Stats struct {
+	CpuStats    CpuStats    `json:"cpu_stats,omitempty"`
+	MemoryStats MemoryStats `json:"memory_stats,omitempty"`
+	PidsStats   PidsStats   `json:"pids_stats,omitempty"`
+	BlkioStats  BlkioStats  `json:"blkio_stats,omitempty"`
+	// the map is in the format "size of hugepage: stats of the hugepage"
+	HugetlbStats map[string]HugetlbStats `json:"hugetlb_stats,omitempty"`
+}
+
+func NewStats() *Stats {
+	memoryStats := MemoryStats{Stats: make(map[string]uint64)}
+	hugetlbStats := make(map[string]HugetlbStats)
+	return &Stats{MemoryStats: memoryStats, HugetlbStats: hugetlbStats}
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/systemd/apply_nosystemd.go

@@ -0,0 +1,55 @@
+// +build !linux
+
+package systemd
+
+import (
+	"fmt"
+
+	"github.com/opencontainers/runc/libcontainer/cgroups"
+	"github.com/opencontainers/runc/libcontainer/configs"
+)
+
+type Manager struct {
+	Cgroups *configs.Cgroup
+	Paths   map[string]string
+}
+
+func UseSystemd() bool {
+	return false
+}
+
+func (m *Manager) Apply(pid int) error {
+	return fmt.Errorf("Systemd not supported")
+}
+
+func (m *Manager) GetPids() ([]int, error) {
+	return nil, fmt.Errorf("Systemd not supported")
+}
+
+func (m *Manager) GetAllPids() ([]int, error) {
+	return nil, fmt.Errorf("Systemd not supported")
+}
+
+func (m *Manager) Destroy() error {
+	return fmt.Errorf("Systemd not supported")
+}
+
+func (m *Manager) GetPaths() map[string]string {
+	return nil
+}
+
+func (m *Manager) GetStats() (*cgroups.Stats, error) {
+	return nil, fmt.Errorf("Systemd not supported")
+}
+
+func (m *Manager) Set(container *configs.Config) error {
+	return nil, fmt.Errorf("Systemd not supported")
+}
+
+func (m *Manager) Freeze(state configs.FreezerState) error {
+	return fmt.Errorf("Systemd not supported")
+}
+
+func Freeze(c *configs.Cgroup, state configs.FreezerState) error {
+	return fmt.Errorf("Systemd not supported")
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/utils.go

@@ -0,0 +1,436 @@
+// +build linux
+
+package cgroups
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/docker/go-units"
+)
+
+const (
+	cgroupNamePrefix = "name="
+	CgroupProcesses  = "cgroup.procs"
+)
+
+// https://www.kernel.org/doc/Documentation/cgroup-v1/cgroups.txt
+func FindCgroupMountpoint(subsystem string) (string, error) {
+	// We are not using mount.GetMounts() because it's super-inefficient,
+	// parsing it directly sped up x10 times because of not using Sscanf.
+	// It was one of two major performance drawbacks in container start.
+	if !isSubsystemAvailable(subsystem) {
+		return "", NewNotFoundError(subsystem)
+	}
+	f, err := os.Open("/proc/self/mountinfo")
+	if err != nil {
+		return "", err
+	}
+	defer f.Close()
+
+	scanner := bufio.NewScanner(f)
+	for scanner.Scan() {
+		txt := scanner.Text()
+		fields := strings.Split(txt, " ")
+		for _, opt := range strings.Split(fields[len(fields)-1], ",") {
+			if opt == subsystem {
+				return fields[4], nil
+			}
+		}
+	}
+	if err := scanner.Err(); err != nil {
+		return "", err
+	}
+
+	return "", NewNotFoundError(subsystem)
+}
+
+func FindCgroupMountpointAndRoot(subsystem string) (string, string, error) {
+	if !isSubsystemAvailable(subsystem) {
+		return "", "", NewNotFoundError(subsystem)
+	}
+	f, err := os.Open("/proc/self/mountinfo")
+	if err != nil {
+		return "", "", err
+	}
+	defer f.Close()
+
+	scanner := bufio.NewScanner(f)
+	for scanner.Scan() {
+		txt := scanner.Text()
+		fields := strings.Split(txt, " ")
+		for _, opt := range strings.Split(fields[len(fields)-1], ",") {
+			if opt == subsystem {
+				return fields[4], fields[3], nil
+			}
+		}
+	}
+	if err := scanner.Err(); err != nil {
+		return "", "", err
+	}
+
+	return "", "", NewNotFoundError(subsystem)
+}
+
+func isSubsystemAvailable(subsystem string) bool {
+	cgroups, err := ParseCgroupFile("/proc/self/cgroup")
+	if err != nil {
+		return false
+	}
+	_, avail := cgroups[subsystem]
+	return avail
+}
+
+func FindCgroupMountpointDir() (string, error) {
+	f, err := os.Open("/proc/self/mountinfo")
+	if err != nil {
+		return "", err
+	}
+	defer f.Close()
+
+	scanner := bufio.NewScanner(f)
+	for scanner.Scan() {
+		text := scanner.Text()
+		fields := strings.Split(text, " ")
+		// Safe as mountinfo encodes mountpoints with spaces as \040.
+		index := strings.Index(text, " - ")
+		postSeparatorFields := strings.Fields(text[index+3:])
+		numPostFields := len(postSeparatorFields)
+
+		// This is an error as we can't detect if the mount is for "cgroup"
+		if numPostFields == 0 {
+			return "", fmt.Errorf("Found no fields post '-' in %q", text)
+		}
+
+		if postSeparatorFields[0] == "cgroup" {
+			// Check that the mount is properly formated.
+			if numPostFields < 3 {
+				return "", fmt.Errorf("Error found less than 3 fields post '-' in %q", text)
+			}
+
+			return filepath.Dir(fields[4]), nil
+		}
+	}
+	if err := scanner.Err(); err != nil {
+		return "", err
+	}
+
+	return "", NewNotFoundError("cgroup")
+}
+
+type Mount struct {
+	Mountpoint string
+	Root       string
+	Subsystems []string
+}
+
+func (m Mount) GetThisCgroupDir(cgroups map[string]string) (string, error) {
+	if len(m.Subsystems) == 0 {
+		return "", fmt.Errorf("no subsystem for mount")
+	}
+
+	return getControllerPath(m.Subsystems[0], cgroups)
+}
+
+func getCgroupMountsHelper(ss map[string]bool, mi io.Reader, all bool) ([]Mount, error) {
+	res := make([]Mount, 0, len(ss))
+	scanner := bufio.NewScanner(mi)
+	numFound := 0
+	for scanner.Scan() && numFound < len(ss) {
+		txt := scanner.Text()
+		sepIdx := strings.Index(txt, " - ")
+		if sepIdx == -1 {
+			return nil, fmt.Errorf("invalid mountinfo format")
+		}
+		if txt[sepIdx+3:sepIdx+9] != "cgroup" {
+			continue
+		}
+		fields := strings.Split(txt, " ")
+		m := Mount{
+			Mountpoint: fields[4],
+			Root:       fields[3],
+		}
+		for _, opt := range strings.Split(fields[len(fields)-1], ",") {
+			if !ss[opt] {
+				continue
+			}
+			if strings.HasPrefix(opt, cgroupNamePrefix) {
+				m.Subsystems = append(m.Subsystems, opt[len(cgroupNamePrefix):])
+			} else {
+				m.Subsystems = append(m.Subsystems, opt)
+			}
+			if !all {
+				numFound++
+			}
+		}
+		res = append(res, m)
+	}
+	if err := scanner.Err(); err != nil {
+		return nil, err
+	}
+	return res, nil
+}
+
+// GetCgroupMounts returns the mounts for the cgroup subsystems.
+// all indicates whether to return just the first instance or all the mounts.
+func GetCgroupMounts(all bool) ([]Mount, error) {
+	f, err := os.Open("/proc/self/mountinfo")
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	allSubsystems, err := ParseCgroupFile("/proc/self/cgroup")
+	if err != nil {
+		return nil, err
+	}
+
+	allMap := make(map[string]bool)
+	for s := range allSubsystems {
+		allMap[s] = true
+	}
+	return getCgroupMountsHelper(allMap, f, all)
+}
+
+// GetAllSubsystems returns all the cgroup subsystems supported by the kernel
+func GetAllSubsystems() ([]string, error) {
+	f, err := os.Open("/proc/cgroups")
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	subsystems := []string{}
+
+	s := bufio.NewScanner(f)
+	for s.Scan() {
+		if err := s.Err(); err != nil {
+			return nil, err
+		}
+		text := s.Text()
+		if text[0] != '#' {
+			parts := strings.Fields(text)
+			if len(parts) >= 4 && parts[3] != "0" {
+				subsystems = append(subsystems, parts[0])
+			}
+		}
+	}
+	return subsystems, nil
+}
+
+// GetThisCgroupDir returns the relative path to the cgroup docker is running in.
+func GetThisCgroupDir(subsystem string) (string, error) {
+	cgroups, err := ParseCgroupFile("/proc/self/cgroup")
+	if err != nil {
+		return "", err
+	}
+
+	return getControllerPath(subsystem, cgroups)
+}
+
+func GetInitCgroupDir(subsystem string) (string, error) {
+
+	cgroups, err := ParseCgroupFile("/proc/1/cgroup")
+	if err != nil {
+		return "", err
+	}
+
+	return getControllerPath(subsystem, cgroups)
+}
+
+func readProcsFile(dir string) ([]int, error) {
+	f, err := os.Open(filepath.Join(dir, CgroupProcesses))
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	var (
+		s   = bufio.NewScanner(f)
+		out = []int{}
+	)
+
+	for s.Scan() {
+		if t := s.Text(); t != "" {
+			pid, err := strconv.Atoi(t)
+			if err != nil {
+				return nil, err
+			}
+			out = append(out, pid)
+		}
+	}
+	return out, nil
+}
+
+// ParseCgroupFile parses the given cgroup file, typically from
+// /proc/<pid>/cgroup, into a map of subgroups to cgroup names.
+func ParseCgroupFile(path string) (map[string]string, error) {
+	f, err := os.Open(path)
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	return parseCgroupFromReader(f)
+}
+
+// helper function for ParseCgroupFile to make testing easier
+func parseCgroupFromReader(r io.Reader) (map[string]string, error) {
+	s := bufio.NewScanner(r)
+	cgroups := make(map[string]string)
+
+	for s.Scan() {
+		if err := s.Err(); err != nil {
+			return nil, err
+		}
+
+		text := s.Text()
+		// from cgroups(7):
+		// /proc/[pid]/cgroup
+		// ...
+		// For each cgroup hierarchy ... there is one entry
+		// containing three colon-separated fields of the form:
+		//     hierarchy-ID:subsystem-list:cgroup-path
+		parts := strings.SplitN(text, ":", 3)
+		if len(parts) < 3 {
+			return nil, fmt.Errorf("invalid cgroup entry: must contain at least two colons: %v", text)
+		}
+
+		for _, subs := range strings.Split(parts[1], ",") {
+			cgroups[subs] = parts[2]
+		}
+	}
+	return cgroups, nil
+}
+
+func getControllerPath(subsystem string, cgroups map[string]string) (string, error) {
+
+	if p, ok := cgroups[subsystem]; ok {
+		return p, nil
+	}
+
+	if p, ok := cgroups[cgroupNamePrefix+subsystem]; ok {
+		return p, nil
+	}
+
+	return "", NewNotFoundError(subsystem)
+}
+
+func PathExists(path string) bool {
+	if _, err := os.Stat(path); err != nil {
+		return false
+	}
+	return true
+}
+
+func EnterPid(cgroupPaths map[string]string, pid int) error {
+	for _, path := range cgroupPaths {
+		if PathExists(path) {
+			if err := WriteCgroupProc(path, pid); err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+// RemovePaths iterates over the provided paths removing them.
+// We trying to remove all paths five times with increasing delay between tries.
+// If after all there are not removed cgroups - appropriate error will be
+// returned.
+func RemovePaths(paths map[string]string) (err error) {
+	delay := 10 * time.Millisecond
+	for i := 0; i < 5; i++ {
+		if i != 0 {
+			time.Sleep(delay)
+			delay *= 2
+		}
+		for s, p := range paths {
+			os.RemoveAll(p)
+			// TODO: here probably should be logging
+			_, err := os.Stat(p)
+			// We need this strange way of checking cgroups existence because
+			// RemoveAll almost always returns error, even on already removed
+			// cgroups
+			if os.IsNotExist(err) {
+				delete(paths, s)
+			}
+		}
+		if len(paths) == 0 {
+			return nil
+		}
+	}
+	return fmt.Errorf("Failed to remove paths: %v", paths)
+}
+
+func GetHugePageSize() ([]string, error) {
+	var pageSizes []string
+	sizeList := []string{"B", "kB", "MB", "GB", "TB", "PB"}
+	files, err := ioutil.ReadDir("/sys/kernel/mm/hugepages")
+	if err != nil {
+		return pageSizes, err
+	}
+	for _, st := range files {
+		nameArray := strings.Split(st.Name(), "-")
+		pageSize, err := units.RAMInBytes(nameArray[1])
+		if err != nil {
+			return []string{}, err
+		}
+		sizeString := units.CustomSize("%g%s", float64(pageSize), 1024.0, sizeList)
+		pageSizes = append(pageSizes, sizeString)
+	}
+
+	return pageSizes, nil
+}
+
+// GetPids returns all pids, that were added to cgroup at path.
+func GetPids(path string) ([]int, error) {
+	return readProcsFile(path)
+}
+
+// GetAllPids returns all pids, that were added to cgroup at path and to all its
+// subcgroups.
+func GetAllPids(path string) ([]int, error) {
+	var pids []int
+	// collect pids from all sub-cgroups
+	err := filepath.Walk(path, func(p string, info os.FileInfo, iErr error) error {
+		dir, file := filepath.Split(p)
+		if file != CgroupProcesses {
+			return nil
+		}
+		if iErr != nil {
+			return iErr
+		}
+		cPids, err := readProcsFile(dir)
+		if err != nil {
+			return err
+		}
+		pids = append(pids, cPids...)
+		return nil
+	})
+	return pids, err
+}
+
+// WriteCgroupProc writes the specified pid into the cgroup's cgroup.procs file
+func WriteCgroupProc(dir string, pid int) error {
+	// Normally dir should not be empty, one case is that cgroup subsystem
+	// is not mounted, we will get empty dir, and we want it fail here.
+	if dir == "" {
+		return fmt.Errorf("no such directory for %s", CgroupProcesses)
+	}
+
+	// Dont attach any pid to the cgroup if -1 is specified as a pid
+	if pid != -1 {
+		if err := ioutil.WriteFile(filepath.Join(dir, CgroupProcesses), []byte(strconv.Itoa(pid)), 0700); err != nil {
+			return fmt.Errorf("failed to write %v to %v: %v", pid, CgroupProcesses, err)
+		}
+	}
+	return nil
+}

vendor/github.com/opencontainers/runc/libcontainer/cgroups/utils_test.go

@@ -0,0 +1,247 @@
+// +build linux
+
+package cgroups
+
+import (
+	"bytes"
+	"fmt"
+	"reflect"
+	"strings"
+	"testing"
+)
+
+const fedoraMountinfo = `15 35 0:3 / /proc rw,nosuid,nodev,noexec,relatime shared:5 - proc proc rw
+16 35 0:14 / /sys rw,nosuid,nodev,noexec,relatime shared:6 - sysfs sysfs rw,seclabel
+17 35 0:5 / /dev rw,nosuid shared:2 - devtmpfs devtmpfs rw,seclabel,size=8056484k,nr_inodes=2014121,mode=755
+18 16 0:15 / /sys/kernel/security rw,nosuid,nodev,noexec,relatime shared:7 - securityfs securityfs rw
+19 16 0:13 / /sys/fs/selinux rw,relatime shared:8 - selinuxfs selinuxfs rw
+20 17 0:16 / /dev/shm rw,nosuid,nodev shared:3 - tmpfs tmpfs rw,seclabel
+21 17 0:10 / /dev/pts rw,nosuid,noexec,relatime shared:4 - devpts devpts rw,seclabel,gid=5,mode=620,ptmxmode=000
+22 35 0:17 / /run rw,nosuid,nodev shared:21 - tmpfs tmpfs rw,seclabel,mode=755
+23 16 0:18 / /sys/fs/cgroup rw,nosuid,nodev,noexec shared:9 - tmpfs tmpfs rw,seclabel,mode=755
+24 23 0:19 / /sys/fs/cgroup/systemd rw,nosuid,nodev,noexec,relatime shared:10 - cgroup cgroup rw,xattr,release_agent=/usr/lib/systemd/systemd-cgroups-agent,name=systemd
+25 16 0:20 / /sys/fs/pstore rw,nosuid,nodev,noexec,relatime shared:20 - pstore pstore rw
+26 23 0:21 / /sys/fs/cgroup/cpuset rw,nosuid,nodev,noexec,relatime shared:11 - cgroup cgroup rw,cpuset,clone_children
+27 23 0:22 / /sys/fs/cgroup/cpu,cpuacct rw,nosuid,nodev,noexec,relatime shared:12 - cgroup cgroup rw,cpuacct,cpu,clone_children
+28 23 0:23 / /sys/fs/cgroup/memory rw,nosuid,nodev,noexec,relatime shared:13 - cgroup cgroup rw,memory,clone_children
+29 23 0:24 / /sys/fs/cgroup/devices rw,nosuid,nodev,noexec,relatime shared:14 - cgroup cgroup rw,devices,clone_children
+30 23 0:25 / /sys/fs/cgroup/freezer rw,nosuid,nodev,noexec,relatime shared:15 - cgroup cgroup rw,freezer,clone_children
+31 23 0:26 / /sys/fs/cgroup/net_cls rw,nosuid,nodev,noexec,relatime shared:16 - cgroup cgroup rw,net_cls,clone_children
+32 23 0:27 / /sys/fs/cgroup/blkio rw,nosuid,nodev,noexec,relatime shared:17 - cgroup cgroup rw,blkio,clone_children
+33 23 0:28 / /sys/fs/cgroup/perf_event rw,nosuid,nodev,noexec,relatime shared:18 - cgroup cgroup rw,perf_event,clone_children
+34 23 0:29 / /sys/fs/cgroup/hugetlb rw,nosuid,nodev,noexec,relatime shared:19 - cgroup cgroup rw,hugetlb,clone_children
+35 1 253:2 / / rw,relatime shared:1 - ext4 /dev/mapper/ssd-root--f20 rw,seclabel,data=ordered
+36 15 0:30 / /proc/sys/fs/binfmt_misc rw,relatime shared:22 - autofs systemd-1 rw,fd=38,pgrp=1,timeout=300,minproto=5,maxproto=5,direct
+37 17 0:12 / /dev/mqueue rw,relatime shared:23 - mqueue mqueue rw,seclabel
+38 35 0:31 / /tmp rw shared:24 - tmpfs tmpfs rw,seclabel
+39 17 0:32 / /dev/hugepages rw,relatime shared:25 - hugetlbfs hugetlbfs rw,seclabel
+40 16 0:7 / /sys/kernel/debug rw,relatime shared:26 - debugfs debugfs rw
+41 16 0:33 / /sys/kernel/config rw,relatime shared:27 - configfs configfs rw
+42 35 0:34 / /var/lib/nfs/rpc_pipefs rw,relatime shared:28 - rpc_pipefs sunrpc rw
+43 15 0:35 / /proc/fs/nfsd rw,relatime shared:29 - nfsd sunrpc rw
+45 35 8:17 / /boot rw,relatime shared:30 - ext4 /dev/sdb1 rw,seclabel,data=ordered
+46 35 253:4 / /home rw,relatime shared:31 - ext4 /dev/mapper/ssd-home rw,seclabel,data=ordered
+47 35 253:5 / /var/lib/libvirt/images rw,noatime,nodiratime shared:32 - ext4 /dev/mapper/ssd-virt rw,seclabel,discard,data=ordered
+48 35 253:12 / /mnt/old rw,relatime shared:33 - ext4 /dev/mapper/HelpDeskRHEL6-FedoraRoot rw,seclabel,data=ordered
+121 22 0:36 / /run/user/1000/gvfs rw,nosuid,nodev,relatime shared:104 - fuse.gvfsd-fuse gvfsd-fuse rw,user_id=1000,group_id=1000
+124 16 0:37 / /sys/fs/fuse/connections rw,relatime shared:107 - fusectl fusectl rw
+165 38 253:3 / /tmp/mnt rw,relatime shared:147 - ext4 /dev/mapper/ssd-root rw,seclabel,data=ordered
+167 35 253:15 / /var/lib/docker/devicemapper/mnt/aae4076022f0e2b80a2afbf8fc6df450c52080191fcef7fb679a73e6f073e5c2 rw,relatime shared:149 - ext4 /dev/mapper/docker-253:2-425882-aae4076022f0e2b80a2afbf8fc6df450c52080191fcef7fb679a73e6f073e5c2 rw,seclabel,discard,stripe=16,data=ordered
+171 35 253:16 / /var/lib/docker/devicemapper/mnt/c71be651f114db95180e472f7871b74fa597ee70a58ccc35cb87139ddea15373 rw,relatime shared:153 - ext4 /dev/mapper/docker-253:2-425882-c71be651f114db95180e472f7871b74fa597ee70a58ccc35cb87139ddea15373 rw,seclabel,discard,stripe=16,data=ordered
+175 35 253:17 / /var/lib/docker/devicemapper/mnt/1bac6ab72862d2d5626560df6197cf12036b82e258c53d981fa29adce6f06c3c rw,relatime shared:157 - ext4 /dev/mapper/docker-253:2-425882-1bac6ab72862d2d5626560df6197cf12036b82e258c53d981fa29adce6f06c3c rw,seclabel,discard,stripe=16,data=ordered
+179 35 253:18 / /var/lib/docker/devicemapper/mnt/d710a357d77158e80d5b2c55710ae07c94e76d34d21ee7bae65ce5418f739b09 rw,relatime shared:161 - ext4 /dev/mapper/docker-253:2-425882-d710a357d77158e80d5b2c55710ae07c94e76d34d21ee7bae65ce5418f739b09 rw,seclabel,discard,stripe=16,data=ordered
+183 35 253:19 / /var/lib/docker/devicemapper/mnt/6479f52366114d5f518db6837254baab48fab39f2ac38d5099250e9a6ceae6c7 rw,relatime shared:165 - ext4 /dev/mapper/docker-253:2-425882-6479f52366114d5f518db6837254baab48fab39f2ac38d5099250e9a6ceae6c7 rw,seclabel,discard,stripe=16,data=ordered
+187 35 253:20 / /var/lib/docker/devicemapper/mnt/8d9df91c4cca5aef49eeb2725292aab324646f723a7feab56be34c2ad08268e1 rw,relatime shared:169 - ext4 /dev/mapper/docker-253:2-425882-8d9df91c4cca5aef49eeb2725292aab324646f723a7feab56be34c2ad08268e1 rw,seclabel,discard,stripe=16,data=ordered
+191 35 253:21 / /var/lib/docker/devicemapper/mnt/c8240b768603d32e920d365dc9d1dc2a6af46cd23e7ae819947f969e1b4ec661 rw,relatime shared:173 - ext4 /dev/mapper/docker-253:2-425882-c8240b768603d32e920d365dc9d1dc2a6af46cd23e7ae819947f969e1b4ec661 rw,seclabel,discard,stripe=16,data=ordered
+195 35 253:22 / /var/lib/docker/devicemapper/mnt/2eb3a01278380bbf3ed12d86ac629eaa70a4351301ee307a5cabe7b5f3b1615f rw,relatime shared:177 - ext4 /dev/mapper/docker-253:2-425882-2eb3a01278380bbf3ed12d86ac629eaa70a4351301ee307a5cabe7b5f3b1615f rw,seclabel,discard,stripe=16,data=ordered
+199 35 253:23 / /var/lib/docker/devicemapper/mnt/37a17fb7c9d9b80821235d5f2662879bd3483915f245f9b49cdaa0e38779b70b rw,relatime shared:181 - ext4 /dev/mapper/docker-253:2-425882-37a17fb7c9d9b80821235d5f2662879bd3483915f245f9b49cdaa0e38779b70b rw,seclabel,discard,stripe=16,data=ordered
+203 35 253:24 / /var/lib/docker/devicemapper/mnt/aea459ae930bf1de913e2f29428fd80ee678a1e962d4080019d9f9774331ee2b rw,relatime shared:185 - ext4 /dev/mapper/docker-253:2-425882-aea459ae930bf1de913e2f29428fd80ee678a1e962d4080019d9f9774331ee2b rw,seclabel,discard,stripe=16,data=ordered
+207 35 253:25 / /var/lib/docker/devicemapper/mnt/928ead0bc06c454bd9f269e8585aeae0a6bd697f46dc8754c2a91309bc810882 rw,relatime shared:189 - ext4 /dev/mapper/docker-253:2-425882-928ead0bc06c454bd9f269e8585aeae0a6bd697f46dc8754c2a91309bc810882 rw,seclabel,discard,stripe=16,data=ordered
+211 35 253:26 / /var/lib/docker/devicemapper/mnt/0f284d18481d671644706e7a7244cbcf63d590d634cc882cb8721821929d0420 rw,relatime shared:193 - ext4 /dev/mapper/docker-253:2-425882-0f284d18481d671644706e7a7244cbcf63d590d634cc882cb8721821929d0420 rw,seclabel,discard,stripe=16,data=ordered
+215 35 253:27 / /var/lib/docker/devicemapper/mnt/d9dd16722ab34c38db2733e23f69e8f4803ce59658250dd63e98adff95d04919 rw,relatime shared:197 - ext4 /dev/mapper/docker-253:2-425882-d9dd16722ab34c38db2733e23f69e8f4803ce59658250dd63e98adff95d04919 rw,seclabel,discard,stripe=16,data=ordered
+219 35 253:28 / /var/lib/docker/devicemapper/mnt/bc4500479f18c2c08c21ad5282e5f826a016a386177d9874c2764751c031d634 rw,relatime shared:201 - ext4 /dev/mapper/docker-253:2-425882-bc4500479f18c2c08c21ad5282e5f826a016a386177d9874c2764751c031d634 rw,seclabel,discard,stripe=16,data=ordered
+223 35 253:29 / /var/lib/docker/devicemapper/mnt/7770c8b24eb3d5cc159a065910076938910d307ab2f5d94e1dc3b24c06ee2c8a rw,relatime shared:205 - ext4 /dev/mapper/docker-253:2-425882-7770c8b24eb3d5cc159a065910076938910d307ab2f5d94e1dc3b24c06ee2c8a rw,seclabel,discard,stripe=16,data=ordered
+227 35 253:30 / /var/lib/docker/devicemapper/mnt/c280cd3d0bf0aa36b478b292279671624cceafc1a67eaa920fa1082601297adf rw,relatime shared:209 - ext4 /dev/mapper/docker-253:2-425882-c280cd3d0bf0aa36b478b292279671624cceafc1a67eaa920fa1082601297adf rw,seclabel,discard,stripe=16,data=ordered
+231 35 253:31 / /var/lib/docker/devicemapper/mnt/8b59a7d9340279f09fea67fd6ad89ddef711e9e7050eb647984f8b5ef006335f rw,relatime shared:213 - ext4 /dev/mapper/docker-253:2-425882-8b59a7d9340279f09fea67fd6ad89ddef711e9e7050eb647984f8b5ef006335f rw,seclabel,discard,stripe=16,data=ordered
+235 35 253:32 / /var/lib/docker/devicemapper/mnt/1a28059f29eda821578b1bb27a60cc71f76f846a551abefabce6efd0146dce9f rw,relatime shared:217 - ext4 /dev/mapper/docker-253:2-425882-1a28059f29eda821578b1bb27a60cc71f76f846a551abefabce6efd0146dce9f rw,seclabel,discard,stripe=16,data=ordered
+239 35 253:33 / /var/lib/docker/devicemapper/mnt/e9aa60c60128cad1 rw,relatime shared:221 - ext4 /dev/mapper/docker-253:2-425882-e9aa60c60128cad1 rw,seclabel,discard,stripe=16,data=ordered
+243 35 253:34 / /var/lib/docker/devicemapper/mnt/5fec11304b6f4713fea7b6ccdcc1adc0a1966187f590fe25a8227428a8df275d-init rw,relatime shared:225 - ext4 /dev/mapper/docker-253:2-425882-5fec11304b6f4713fea7b6ccdcc1adc0a1966187f590fe25a8227428a8df275d-init rw,seclabel,discard,stripe=16,data=ordered
+247 35 253:35 / /var/lib/docker/devicemapper/mnt/5fec11304b6f4713fea7b6ccdcc1adc0a1966187f590fe25a8227428a8df275d rw,relatime shared:229 - ext4 /dev/mapper/docker-253:2-425882-5fec11304b6f4713fea7b6ccdcc1adc0a1966187f590fe25a8227428a8df275d rw,seclabel,discard,stripe=16,data=ordered
+31 21 0:23 / /DATA/foo_bla_bla rw,relatime - cifs //foo/BLA\040BLA\040BLA/ rw,sec=ntlm,cache=loose,unc=\\foo\BLA BLA BLA,username=my_login,domain=mydomain.com,uid=12345678,forceuid,gid=12345678,forcegid,addr=10.1.30.10,file_mode=0755,dir_mode=0755,nounix,rsize=61440,wsize=65536,actimeo=1`
+
+const systemdMountinfo = `115 83 0:32 / / rw,relatime - aufs none rw,si=c0bd3d3,dio,dirperm1
+116 115 0:35 / /proc rw,nosuid,nodev,noexec,relatime - proc proc rw
+117 115 0:36 / /dev rw,nosuid - tmpfs tmpfs rw,mode=755
+118 117 0:37 / /dev/pts rw,nosuid,noexec,relatime - devpts devpts rw,gid=5,mode=620,ptmxmode=666
+119 115 0:38 / /sys rw,nosuid,nodev,noexec,relatime - sysfs sysfs rw
+120 119 0:39 / /sys/fs/cgroup rw,nosuid,nodev,noexec,relatime - tmpfs tmpfs rw,mode=755
+121 120 0:19 /system.slice/docker-dc4eaa1a34ec4d593bc0125d31eea823a1d76ae483aeb1409cca80304e34da2e.scope /sys/fs/cgroup/systemd rw,nosuid,nodev,noexec,relatime - cgroup cgroup rw,xattr,release_agent=/lib/systemd/systemd-cgroups-agent,name=systemd
+122 120 0:20 /system.slice/docker-dc4eaa1a34ec4d593bc0125d31eea823a1d76ae483aeb1409cca80304e34da2e.scope /sys/fs/cgroup/devices rw,nosuid,nodev,noexec,relatime - cgroup cgroup rw,devices
+123 120 0:21 /system.slice/docker-dc4eaa1a34ec4d593bc0125d31eea823a1d76ae483aeb1409cca80304e34da2e.scope /sys/fs/cgroup/freezer rw,nosuid,nodev,noexec,relatime - cgroup cgroup rw,freezer
+124 120 0:22 /system.slice/docker-dc4eaa1a34ec4d593bc0125d31eea823a1d76ae483aeb1409cca80304e34da2e.scope /sys/fs/cgroup/memory rw,nosuid,nodev,noexec,relatime - cgroup cgroup rw,memory
+125 120 0:23 /system.slice/docker-dc4eaa1a34ec4d593bc0125d31eea823a1d76ae483aeb1409cca80304e34da2e.scope /sys/fs/cgroup/net_cls,net_prio rw,nosuid,nodev,noexec,relatime - cgroup cgroup rw,net_cls,net_prio
+126 120 0:24 /system.slice/docker-dc4eaa1a34ec4d593bc0125d31eea823a1d76ae483aeb1409cca80304e34da2e.scope /sys/fs/cgroup/blkio rw,nosuid,nodev,noexec,relatime - cgroup cgroup rw,blkio
+127 120 0:25 /system.slice/docker-dc4eaa1a34ec4d593bc0125d31eea823a1d76ae483aeb1409cca80304e34da2e.scope /sys/fs/cgroup/cpuset rw,nosuid,nodev,noexec,relatime - cgroup cgroup rw,cpuset,clone_children
+128 120 0:26 /system.slice/docker-dc4eaa1a34ec4d593bc0125d31eea823a1d76ae483aeb1409cca80304e34da2e.scope /sys/fs/cgroup/cpu,cpuacct rw,nosuid,nodev,noexec,relatime - cgroup cgroup rw,cpu,cpuacct
+129 120 0:27 /system.slice/docker-dc4eaa1a34ec4d593bc0125d31eea823a1d76ae483aeb1409cca80304e34da2e.scope /sys/fs/cgroup/perf_event rw,nosuid,nodev,noexec,relatime - cgroup cgroup rw,perf_event,release_agent=/run/cgmanager/agents/cgm-release-agent.perf_event
+130 115 43:0 /var/lib/docker/volumes/a44a712176377f57c094397330ee04387284c478364eb25f4c3d25f775f25c26/_data /var/lib/docker rw,relatime - ext4 /dev/nbd0 rw,data=ordered
+131 115 43:0 /var/lib/docker/containers/dc4eaa1a34ec4d593bc0125d31eea823a1d76ae483aeb1409cca80304e34da2e/resolv.conf /etc/resolv.conf rw,relatime - ext4 /dev/nbd0 rw,data=ordered
+132 115 43:0 /var/lib/docker/containers/dc4eaa1a34ec4d593bc0125d31eea823a1d76ae483aeb1409cca80304e34da2e/hostname /etc/hostname rw,relatime - ext4 /dev/nbd0 rw,data=ordered
+133 115 43:0 /var/lib/docker/containers/dc4eaa1a34ec4d593bc0125d31eea823a1d76ae483aeb1409cca80304e34da2e/hosts /etc/hosts rw,relatime - ext4 /dev/nbd0 rw,data=ordered
+134 117 0:33 / /dev/shm rw,nosuid,nodev,noexec,relatime - tmpfs shm rw,size=65536k
+135 117 0:13 / /dev/mqueue rw,nosuid,nodev,noexec,relatime - mqueue mqueue rw
+136 117 0:12 /1 /dev/console rw,nosuid,noexec,relatime - devpts none rw,gid=5,mode=620,ptmxmode=000
+84 115 0:40 / /tmp rw,relatime - tmpfs none rw`
+
+func TestGetCgroupMounts(t *testing.T) {
+	type testData struct {
+		mountInfo  string
+		root       string
+		subsystems map[string]bool
+	}
+	testTable := []testData{
+		{
+			mountInfo: fedoraMountinfo,
+			root:      "/",
+			subsystems: map[string]bool{
+				"cpuset":     true,
+				"cpu":        true,
+				"cpuacct":    true,
+				"memory":     true,
+				"devices":    true,
+				"freezer":    true,
+				"net_cls":    true,
+				"blkio":      true,
+				"perf_event": true,
+				"hugetlb":    true,
+			},
+		},
+		{
+			mountInfo: systemdMountinfo,
+			root:      "/system.slice/docker-dc4eaa1a34ec4d593bc0125d31eea823a1d76ae483aeb1409cca80304e34da2e.scope",
+			subsystems: map[string]bool{
+				"cpuset":     true,
+				"cpu":        true,
+				"cpuacct":    true,
+				"memory":     true,
+				"devices":    true,
+				"freezer":    true,
+				"net_cls":    true,
+				"blkio":      true,
+				"perf_event": true,
+			},
+		},
+	}
+	for _, td := range testTable {
+		mi := bytes.NewBufferString(td.mountInfo)
+		cgMounts, err := getCgroupMountsHelper(td.subsystems, mi, false)
+		if err != nil {
+			t.Fatal(err)
+		}
+		cgMap := make(map[string]Mount)
+		for _, m := range cgMounts {
+			for _, ss := range m.Subsystems {
+				cgMap[ss] = m
+			}
+		}
+		for ss := range td.subsystems {
+			m, ok := cgMap[ss]
+			if !ok {
+				t.Fatalf("%s not found", ss)
+			}
+			if m.Root != td.root {
+				t.Fatalf("unexpected root for %s: %s", ss, m.Root)
+			}
+			if !strings.HasPrefix(m.Mountpoint, "/sys/fs/cgroup/") && !strings.Contains(m.Mountpoint, ss) {
+				t.Fatalf("unexpected mountpoint for %s: %s", ss, m.Mountpoint)
+			}
+			var ssFound bool
+			for _, mss := range m.Subsystems {
+				if mss == ss {
+					ssFound = true
+					break
+				}
+			}
+			if !ssFound {
+				t.Fatalf("subsystem %s not found in Subsystems field %v", ss, m.Subsystems)
+			}
+		}
+	}
+}
+
+func BenchmarkGetCgroupMounts(b *testing.B) {
+	subsystems := map[string]bool{
+		"cpuset":     true,
+		"cpu":        true,
+		"cpuacct":    true,
+		"memory":     true,
+		"devices":    true,
+		"freezer":    true,
+		"net_cls":    true,
+		"blkio":      true,
+		"perf_event": true,
+		"hugetlb":    true,
+	}
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		b.StopTimer()
+		mi := bytes.NewBufferString(fedoraMountinfo)
+		b.StartTimer()
+		if _, err := getCgroupMountsHelper(subsystems, mi, false); err != nil {
+			b.Fatal(err)
+		}
+	}
+}
+
+func TestParseCgroupString(t *testing.T) {
+	testCases := []struct {
+		input          string
+		expectedError  error
+		expectedOutput map[string]string
+	}{
+		{
+			// Taken from a CoreOS instance running systemd 225 with CPU/Mem
+			// accounting enabled in systemd
+			input: `9:blkio:/
+8:freezer:/
+7:perf_event:/
+6:devices:/system.slice/system-sshd.slice
+5:cpuset:/
+4:cpu,cpuacct:/system.slice/system-sshd.slice/sshd@126-10.240.0.15:22-xxx.yyy.zzz.aaa:33678.service
+3:net_cls,net_prio:/
+2:memory:/system.slice/system-sshd.slice/sshd@126-10.240.0.15:22-xxx.yyy.zzz.aaa:33678.service
+1:name=systemd:/system.slice/system-sshd.slice/sshd@126-10.240.0.15:22-xxx.yyy.zzz.aaa:33678.service`,
+			expectedOutput: map[string]string{
+				"name=systemd": "/system.slice/system-sshd.slice/sshd@126-10.240.0.15:22-xxx.yyy.zzz.aaa:33678.service",
+				"blkio":        "/",
+				"freezer":      "/",
+				"perf_event":   "/",
+				"devices":      "/system.slice/system-sshd.slice",
+				"cpuset":       "/",
+				"cpu":          "/system.slice/system-sshd.slice/sshd@126-10.240.0.15:22-xxx.yyy.zzz.aaa:33678.service",
+				"cpuacct":      "/system.slice/system-sshd.slice/sshd@126-10.240.0.15:22-xxx.yyy.zzz.aaa:33678.service",
+				"net_cls":      "/",
+				"net_prio":     "/",
+				"memory":       "/system.slice/system-sshd.slice/sshd@126-10.240.0.15:22-xxx.yyy.zzz.aaa:33678.service",
+			},
+		},
+		{
+			input:         `malformed input`,
+			expectedError: fmt.Errorf(`invalid cgroup entry: must contain at least two colons: malformed input`),
+		},
+	}
+
+	for ndx, testCase := range testCases {
+		out, err := parseCgroupFromReader(strings.NewReader(testCase.input))
+		if err != nil {
+			if testCase.expectedError == nil || testCase.expectedError.Error() != err.Error() {
+				t.Errorf("%v: expected error %v, got error %v", ndx, testCase.expectedError, err)
+			}
+		} else {
+			if !reflect.DeepEqual(testCase.expectedOutput, out) {
+				t.Errorf("%v: expected output %v, got error %v", ndx, testCase.expectedOutput, out)
+			}
+		}
+	}
+
+}

vendor/github.com/opencontainers/runc/libcontainer/compat_1.5_linux.go

@@ -0,0 +1,10 @@
+// +build linux,!go1.5
+
+package libcontainer
+
+import "syscall"
+
+// GidMappingsEnableSetgroups was added in Go 1.5, so do nothing when building
+// with earlier versions
+func enableSetgroups(sys *syscall.SysProcAttr) {
+}

vendor/github.com/opencontainers/runc/libcontainer/configs/blkio_device.go

@@ -0,0 +1,61 @@
+package configs
+
+import "fmt"
+
+// blockIODevice holds major:minor format supported in blkio cgroup
+type blockIODevice struct {
+	// Major is the device's major number
+	Major int64 `json:"major"`
+	// Minor is the device's minor number
+	Minor int64 `json:"minor"`
+}
+
+// WeightDevice struct holds a `major:minor weight`|`major:minor leaf_weight` pair
+type WeightDevice struct {
+	blockIODevice
+	// Weight is the bandwidth rate for the device, range is from 10 to 1000
+	Weight uint16 `json:"weight"`
+	// LeafWeight is the bandwidth rate for the device while competing with the cgroup's child cgroups, range is from 10 to 1000, cfq scheduler only
+	LeafWeight uint16 `json:"leafWeight"`
+}
+
+// NewWeightDevice returns a configured WeightDevice pointer
+func NewWeightDevice(major, minor int64, weight, leafWeight uint16) *WeightDevice {
+	wd := &WeightDevice{}
+	wd.Major = major
+	wd.Minor = minor
+	wd.Weight = weight
+	wd.LeafWeight = leafWeight
+	return wd
+}
+
+// WeightString formats the struct to be writable to the cgroup specific file
+func (wd *WeightDevice) WeightString() string {
+	return fmt.Sprintf("%d:%d %d", wd.Major, wd.Minor, wd.Weight)
+}
+
+// LeafWeightString formats the struct to be writable to the cgroup specific file
+func (wd *WeightDevice) LeafWeightString() string {
+	return fmt.Sprintf("%d:%d %d", wd.Major, wd.Minor, wd.LeafWeight)
+}
+
+// ThrottleDevice struct holds a `major:minor rate_per_second` pair
+type ThrottleDevice struct {
+	blockIODevice
+	// Rate is the IO rate limit per cgroup per device
+	Rate uint64 `json:"rate"`
+}
+
+// NewThrottleDevice returns a configured ThrottleDevice pointer
+func NewThrottleDevice(major, minor int64, rate uint64) *ThrottleDevice {
+	td := &ThrottleDevice{}
+	td.Major = major
+	td.Minor = minor
+	td.Rate = rate
+	return td
+}
+
+// String formats the struct to be writable to the cgroup specific file
+func (td *ThrottleDevice) String() string {
+	return fmt.Sprintf("%d:%d %d", td.Major, td.Minor, td.Rate)
+}

vendor/github.com/opencontainers/runc/libcontainer/configs/cgroup_unix.go

@@ -0,0 +1,124 @@
+// +build linux freebsd
+
+package configs
+
+type FreezerState string
+
+const (
+	Undefined FreezerState = ""
+	Frozen    FreezerState = "FROZEN"
+	Thawed    FreezerState = "THAWED"
+)
+
+type Cgroup struct {
+	// Deprecated, use Path instead
+	Name string `json:"name,omitempty"`
+
+	// name of parent of cgroup or slice
+	// Deprecated, use Path instead
+	Parent string `json:"parent,omitempty"`
+
+	// Path specifies the path to cgroups that are created and/or joined by the container.
+	// The path is assumed to be relative to the host system cgroup mountpoint.
+	Path string `json:"path"`
+
+	// ScopePrefix describes prefix for the scope name
+	ScopePrefix string `json:"scope_prefix"`
+
+	// Paths represent the absolute cgroups paths to join.
+	// This takes precedence over Path.
+	Paths map[string]string
+
+	// Resources contains various cgroups settings to apply
+	*Resources
+}
+
+type Resources struct {
+	// If this is true allow access to any kind of device within the container.  If false, allow access only to devices explicitly listed in the allowed_devices list.
+	// Deprecated
+	AllowAllDevices *bool `json:"allow_all_devices,omitempty"`
+	// Deprecated
+	AllowedDevices []*Device `json:"allowed_devices,omitempty"`
+	// Deprecated
+	DeniedDevices []*Device `json:"denied_devices,omitempty"`
+
+	Devices []*Device `json:"devices"`
+
+	// Memory limit (in bytes)
+	Memory int64 `json:"memory"`
+
+	// Memory reservation or soft_limit (in bytes)
+	MemoryReservation int64 `json:"memory_reservation"`
+
+	// Total memory usage (memory + swap); set `-1` to enable unlimited swap
+	MemorySwap int64 `json:"memory_swap"`
+
+	// Kernel memory limit (in bytes)
+	KernelMemory int64 `json:"kernel_memory"`
+
+	// Kernel memory limit for TCP use (in bytes)
+	KernelMemoryTCP int64 `json:"kernel_memory_tcp"`
+
+	// CPU shares (relative weight vs. other containers)
+	CpuShares int64 `json:"cpu_shares"`
+
+	// CPU hardcap limit (in usecs). Allowed cpu time in a given period.
+	CpuQuota int64 `json:"cpu_quota"`
+
+	// CPU period to be used for hardcapping (in usecs). 0 to use system default.
+	CpuPeriod int64 `json:"cpu_period"`
+
+	// How many time CPU will use in realtime scheduling (in usecs).
+	CpuRtRuntime int64 `json:"cpu_rt_quota"`
+
+	// CPU period to be used for realtime scheduling (in usecs).
+	CpuRtPeriod int64 `json:"cpu_rt_period"`
+
+	// CPU to use
+	CpusetCpus string `json:"cpuset_cpus"`
+
+	// MEM to use
+	CpusetMems string `json:"cpuset_mems"`
+
+	// Process limit; set <= `0' to disable limit.
+	PidsLimit int64 `json:"pids_limit"`
+
+	// Specifies per cgroup weight, range is from 10 to 1000.
+	BlkioWeight uint16 `json:"blkio_weight"`
+
+	// Specifies tasks' weight in the given cgroup while competing with the cgroup's child cgroups, range is from 10 to 1000, cfq scheduler only
+	BlkioLeafWeight uint16 `json:"blkio_leaf_weight"`
+
+	// Weight per cgroup per device, can override BlkioWeight.
+	BlkioWeightDevice []*WeightDevice `json:"blkio_weight_device"`
+
+	// IO read rate limit per cgroup per device, bytes per second.
+	BlkioThrottleReadBpsDevice []*ThrottleDevice `json:"blkio_throttle_read_bps_device"`
+
+	// IO write rate limit per cgroup per device, bytes per second.
+	BlkioThrottleWriteBpsDevice []*ThrottleDevice `json:"blkio_throttle_write_bps_device"`
+
+	// IO read rate limit per cgroup per device, IO per second.
+	BlkioThrottleReadIOPSDevice []*ThrottleDevice `json:"blkio_throttle_read_iops_device"`
+
+	// IO write rate limit per cgroup per device, IO per second.
+	BlkioThrottleWriteIOPSDevice []*ThrottleDevice `json:"blkio_throttle_write_iops_device"`
+
+	// set the freeze value for the process
+	Freezer FreezerState `json:"freezer"`
+
+	// Hugetlb limit (in bytes)
+	HugetlbLimit []*HugepageLimit `json:"hugetlb_limit"`
+
+	// Whether to disable OOM Killer
+	OomKillDisable bool `json:"oom_kill_disable"`
+
+	// Tuning swappiness behaviour per cgroup
+	MemorySwappiness *int64 `json:"memory_swappiness"`
+
+	// Set priority of network traffic for container
+	NetPrioIfpriomap []*IfPrioMap `json:"net_prio_ifpriomap"`
+
+	// Set class identifier for container's network packets
+	NetClsClassid uint32 `json:"net_cls_classid_u"`
+}

vendor/github.com/opencontainers/runc/libcontainer/configs/cgroup_unsupported.go

@@ -0,0 +1,6 @@
+// +build !windows,!linux,!freebsd
+
+package configs
+
+type Cgroup struct {
+}

vendor/github.com/opencontainers/runc/libcontainer/configs/cgroup_windows.go

@@ -0,0 +1,6 @@
+package configs
+
+// TODO Windows: This can ultimately be entirely factored out on Windows as
+// cgroups are a Unix-specific construct.
+type Cgroup struct {
+}

vendor/github.com/opencontainers/runc/libcontainer/configs/config.go

@@ -0,0 +1,332 @@
+package configs
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"os/exec"
+	"time"
+
+	"github.com/Sirupsen/logrus"
+)
+
+type Rlimit struct {
+	Type int    `json:"type"`
+	Hard uint64 `json:"hard"`
+	Soft uint64 `json:"soft"`
+}
+
+// IDMap represents UID/GID Mappings for User Namespaces.
+type IDMap struct {
+	ContainerID int `json:"container_id"`
+	HostID      int `json:"host_id"`
+	Size        int `json:"size"`
+}
+
+// Seccomp represents syscall restrictions
+// By default, only the native architecture of the kernel is allowed to be used
+// for syscalls. Additional architectures can be added by specifying them in
+// Architectures.
+type Seccomp struct {
+	DefaultAction Action     `json:"default_action"`
+	Architectures []string   `json:"architectures"`
+	Syscalls      []*Syscall `json:"syscalls"`
+}
+
+// Action is taken upon rule match in Seccomp
+type Action int
+
+const (
+	Kill Action = iota + 1
+	Errno
+	Trap
+	Allow
+	Trace
+)
+
+// Operator is a comparison operator to be used when matching syscall arguments in Seccomp
+type Operator int
+
+const (
+	EqualTo Operator = iota + 1
+	NotEqualTo
+	GreaterThan
+	GreaterThanOrEqualTo
+	LessThan
+	LessThanOrEqualTo
+	MaskEqualTo
+)
+
+// Arg is a rule to match a specific syscall argument in Seccomp
+type Arg struct {
+	Index    uint     `json:"index"`
+	Value    uint64   `json:"value"`
+	ValueTwo uint64   `json:"value_two"`
+	Op       Operator `json:"op"`
+}
+
+// Syscall is a rule to match a syscall in Seccomp
+type Syscall struct {
+	Name   string `json:"name"`
+	Action Action `json:"action"`
+	Args   []*Arg `json:"args"`
+}
+
+// TODO Windows. Many of these fields should be factored out into those parts
+// which are common across platforms, and those which are platform specific.
+
+// Config defines configuration options for executing a process inside a contained environment.
+type Config struct {
+	// NoPivotRoot will use MS_MOVE and a chroot to jail the process into the container's rootfs
+	// This is a common option when the container is running in ramdisk
+	NoPivotRoot bool `json:"no_pivot_root"`
+
+	// ParentDeathSignal specifies the signal that is sent to the container's process in the case
+	// that the parent process dies.
+	ParentDeathSignal int `json:"parent_death_signal"`
+
+	// Path to a directory containing the container's root filesystem.
+	Rootfs string `json:"rootfs"`
+
+	// Readonlyfs will remount the container's rootfs as readonly where only externally mounted
+	// bind mounts are writtable.
+	Readonlyfs bool `json:"readonlyfs"`
+
+	// Specifies the mount propagation flags to be applied to /.
+	RootPropagation int `json:"rootPropagation"`
+
+	// Mounts specify additional source and destination paths that will be mounted inside the container's
+	// rootfs and mount namespace if specified
+	Mounts []*Mount `json:"mounts"`
+
+	// The device nodes that should be automatically created within the container upon container start.  Note, make sure that the node is marked as allowed in the cgroup as well!
+	Devices []*Device `json:"devices"`
+
+	MountLabel string `json:"mount_label"`
+
+	// Hostname optionally sets the container's hostname if provided
+	Hostname string `json:"hostname"`
+
+	// Namespaces specifies the container's namespaces that it should setup when cloning the init process
+	// If a namespace is not provided that namespace is shared from the container's parent process
+	Namespaces Namespaces `json:"namespaces"`
+
+	// Capabilities specify the capabilities to keep when executing the process inside the container
+	// All capbilities not specified will be dropped from the processes capability mask
+	Capabilities []string `json:"capabilities"`
+
+	// Networks specifies the container's network setup to be created
+	Networks []*Network `json:"networks"`
+
+	// Routes can be specified to create entries in the route table as the container is started
+	Routes []*Route `json:"routes"`
+
+	// Cgroups specifies specific cgroup settings for the various subsystems that the container is
+	// placed into to limit the resources the container has available
+	Cgroups *Cgroup `json:"cgroups"`
+
+	// AppArmorProfile specifies the profile to apply to the process running in the container and is
+	// change at the time the process is execed
+	AppArmorProfile string `json:"apparmor_profile,omitempty"`
+
+	// ProcessLabel specifies the label to apply to the process running in the container.  It is
+	// commonly used by selinux
+	ProcessLabel string `json:"process_label,omitempty"`
+
+	// Rlimits specifies the resource limits, such as max open files, to set in the container
+	// If Rlimits are not set, the container will inherit rlimits from the parent process
+	Rlimits []Rlimit `json:"rlimits,omitempty"`
+
+	// OomScoreAdj specifies the adjustment to be made by the kernel when calculating oom scores
+	// for a process. Valid values are between the range [-1000, '1000'], where processes with
+	// higher scores are preferred for being killed.
+	// More information about kernel oom score calculation here: https://lwn.net/Articles/317814/
+	OomScoreAdj int `json:"oom_score_adj"`
+
+	// UidMappings is an array of User ID mappings for User Namespaces
+	UidMappings []IDMap `json:"uid_mappings"`
+
+	// GidMappings is an array of Group ID mappings for User Namespaces
+	GidMappings []IDMap `json:"gid_mappings"`
+
+	// MaskPaths specifies paths within the container's rootfs to mask over with a bind
+	// mount pointing to /dev/null as to prevent reads of the file.
+	MaskPaths []string `json:"mask_paths"`
+
+	// ReadonlyPaths specifies paths within the container's rootfs to remount as read-only
+	// so that these files prevent any writes.
+	ReadonlyPaths []string `json:"readonly_paths"`
+
+	// Sysctl is a map of properties and their values. It is the equivalent of using
+	// sysctl -w my.property.name value in Linux.
+	Sysctl map[string]string `json:"sysctl"`
+
+	// Seccomp allows actions to be taken whenever a syscall is made within the container.
+	// A number of rules are given, each having an action to be taken if a syscall matches it.
+	// A default action to be taken if no rules match is also given.
+	Seccomp *Seccomp `json:"seccomp"`
+
+	// NoNewPrivileges controls whether processes in the container can gain additional privileges.
+	NoNewPrivileges bool `json:"no_new_privileges,omitempty"`
+
+	// Hooks are a collection of actions to perform at various container lifecycle events.
+	// CommandHooks are serialized to JSON, but other hooks are not.
+	Hooks *Hooks
+
+	// Version is the version of opencontainer specification that is supported.
+	Version string `json:"version"`
+
+	// Labels are user defined metadata that is stored in the config and populated on the state
+	Labels []string `json:"labels"`
+
+	// NoNewKeyring will not allocated a new session keyring for the container.  It will use the
+	// callers keyring in this case.
+	NoNewKeyring bool `json:"no_new_keyring"`
+}
+
+type Hooks struct {
+	// Prestart commands are executed after the container namespaces are created,
+	// but before the user supplied command is executed from init.
+	Prestart []Hook
+
+	// Poststart commands are executed after the container init process starts.
+	Poststart []Hook
+
+	// Poststop commands are executed after the container init process exits.
+	Poststop []Hook
+}
+
+func (hooks *Hooks) UnmarshalJSON(b []byte) error {
+	var state struct {
+		Prestart  []CommandHook
+		Poststart []CommandHook
+		Poststop  []CommandHook
+	}
+
+	if err := json.Unmarshal(b, &state); err != nil {
+		return err
+	}
+
+	deserialize := func(shooks []CommandHook) (hooks []Hook) {
+		for _, shook := range shooks {
+			hooks = append(hooks, shook)
+		}
+
+		return hooks
+	}
+
+	hooks.Prestart = deserialize(state.Prestart)
+	hooks.Poststart = deserialize(state.Poststart)
+	hooks.Poststop = deserialize(state.Poststop)
+	return nil
+}
+
+func (hooks Hooks) MarshalJSON() ([]byte, error) {
+	serialize := func(hooks []Hook) (serializableHooks []CommandHook) {
+		for _, hook := range hooks {
+			switch chook := hook.(type) {
+			case CommandHook:
+				serializableHooks = append(serializableHooks, chook)
+			default:
+				logrus.Warnf("cannot serialize hook of type %T, skipping", hook)
+			}
+		}
+
+		return serializableHooks
+	}
+
+	return json.Marshal(map[string]interface{}{
+		"prestart":  serialize(hooks.Prestart),
+		"poststart": serialize(hooks.Poststart),
+		"poststop":  serialize(hooks.Poststop),
+	})
+}
+
+// HookState is the payload provided to a hook on execution.
+type HookState struct {
+	Version    string `json:"ociVersion"`
+	ID         string `json:"id"`
+	Pid        int    `json:"pid"`
+	Root       string `json:"root"`
+	BundlePath string `json:"bundlePath"`
+}
+
+type Hook interface {
+	// Run executes the hook with the provided state.
+	Run(HookState) error
+}
+
+// NewFunctionHook will call the provided function when the hook is run.
+func NewFunctionHook(f func(HookState) error) FuncHook {
+	return FuncHook{
+		run: f,
+	}
+}
+
+type FuncHook struct {
+	run func(HookState) error
+}
+
+func (f FuncHook) Run(s HookState) error {
+	return f.run(s)
+}
+
+type Command struct {
+	Path    string         `json:"path"`
+	Args    []string       `json:"args"`
+	Env     []string       `json:"env"`
+	Dir     string         `json:"dir"`
+	Timeout *time.Duration `json:"timeout"`
+}
+
+// NewCommandHook will execute the provided command when the hook is run.
+func NewCommandHook(cmd Command) CommandHook {
+	return CommandHook{
+		Command: cmd,
+	}
+}
+
+type CommandHook struct {
+	Command
+}
+
+func (c Command) Run(s HookState) error {
+	b, err := json.Marshal(s)
+	if err != nil {
+		return err
+	}
+	var stdout, stderr bytes.Buffer
+	cmd := exec.Cmd{
+		Path:   c.Path,
+		Args:   c.Args,
+		Env:    c.Env,
+		Stdin:  bytes.NewReader(b),
+		Stdout: &stdout,
+		Stderr: &stderr,
+	}
+	if err := cmd.Start(); err != nil {
+		return err
+	}
+	errC := make(chan error, 1)
+	go func() {
+		err := cmd.Wait()
+		if err != nil {
+			err = fmt.Errorf("error running hook: %v, stdout: %s, stderr: %s", err, stdout.String(), stderr.String())
+		}
+		errC <- err
+	}()
+	var timerCh <-chan time.Time
+	if c.Timeout != nil {
+		timer := time.NewTimer(*c.Timeout)
+		defer timer.Stop()
+		timerCh = timer.C
+	}
+	select {
+	case err := <-errC:
+		return err
+	case <-timerCh:
+		cmd.Process.Kill()
+		cmd.Wait()
+		return fmt.Errorf("hook ran past specified timeout of %.1fs", c.Timeout.Seconds())
+	}
+}

vendor/github.com/opencontainers/runc/libcontainer/configs/config_test.go

@@ -0,0 +1,191 @@
+package configs_test
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"reflect"
+	"testing"
+	"time"
+
+	"github.com/opencontainers/runc/libcontainer/configs"
+)
+
+func TestUnmarshalHooks(t *testing.T) {
+	timeout := time.Second
+
+	prestartCmd := configs.NewCommandHook(configs.Command{
+		Path:    "/var/vcap/hooks/prestart",
+		Args:    []string{"--pid=123"},
+		Env:     []string{"FOO=BAR"},
+		Dir:     "/var/vcap",
+		Timeout: &timeout,
+	})
+	prestart, err := json.Marshal(prestartCmd.Command)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	hook := configs.Hooks{}
+	err = hook.UnmarshalJSON([]byte(fmt.Sprintf(`{"Prestart" :[%s]}`, prestart)))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if !reflect.DeepEqual(hook.Prestart[0], prestartCmd) {
+		t.Errorf("Expected prestart to equal %+v but it was %+v",
+			prestartCmd, hook.Prestart[0])
+	}
+}
+
+func TestUnmarshalHooksWithInvalidData(t *testing.T) {
+	hook := configs.Hooks{}
+	err := hook.UnmarshalJSON([]byte(`{invalid-json}`))
+	if err == nil {
+		t.Error("Expected error to occur but it was nil")
+	}
+}
+
+func TestMarshalHooks(t *testing.T) {
+	timeout := time.Second
+
+	prestartCmd := configs.NewCommandHook(configs.Command{
+		Path:    "/var/vcap/hooks/prestart",
+		Args:    []string{"--pid=123"},
+		Env:     []string{"FOO=BAR"},
+		Dir:     "/var/vcap",
+		Timeout: &timeout,
+	})
+
+	hook := configs.Hooks{
+		Prestart: []configs.Hook{prestartCmd},
+	}
+	hooks, err := hook.MarshalJSON()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	h := `{"poststart":null,"poststop":null,"prestart":[{"path":"/var/vcap/hooks/prestart","args":["--pid=123"],"env":["FOO=BAR"],"dir":"/var/vcap","timeout":1000000000}]}`
+	if string(hooks) != h {
+		t.Errorf("Expected hooks %s to equal %s", string(hooks), h)
+	}
+}
+
+func TestMarshalUnmarshalHooks(t *testing.T) {
+	timeout := time.Second
+
+	prestart := configs.NewCommandHook(configs.Command{
+		Path:    "/var/vcap/hooks/prestart",
+		Args:    []string{"--pid=123"},
+		Env:     []string{"FOO=BAR"},
+		Dir:     "/var/vcap",
+		Timeout: &timeout,
+	})
+
+	hook := configs.Hooks{
+		Prestart: []configs.Hook{prestart},
+	}
+	hooks, err := hook.MarshalJSON()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	umMhook := configs.Hooks{}
+	err = umMhook.UnmarshalJSON(hooks)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !reflect.DeepEqual(umMhook.Prestart[0], prestart) {
+		t.Errorf("Expected hooks to be equal after mashaling -> unmarshaling them: %+v, %+v", umMhook.Prestart[0], prestart)
+	}
+}
+
+func TestMarshalHooksWithUnexpectedType(t *testing.T) {
+	fHook := configs.NewFunctionHook(func(configs.HookState) error {
+		return nil
+	})
+	hook := configs.Hooks{
+		Prestart: []configs.Hook{fHook},
+	}
+	hooks, err := hook.MarshalJSON()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	h := `{"poststart":null,"poststop":null,"prestart":null}`
+	if string(hooks) != h {
+		t.Errorf("Expected hooks %s to equal %s", string(hooks), h)
+	}
+}
+
+func TestFuncHookRun(t *testing.T) {
+	state := configs.HookState{
+		Version: "1",
+		ID:      "1",
+		Pid:     1,
+		Root:    "root",
+	}
+
+	fHook := configs.NewFunctionHook(func(s configs.HookState) error {
+		if !reflect.DeepEqual(state, s) {
+			t.Errorf("Expected state %+v to equal %+v", state, s)
+		}
+		return nil
+	})
+
+	fHook.Run(state)
+}
+
+func TestCommandHookRun(t *testing.T) {
+	state := configs.HookState{
+		Version: "1",
+		ID:      "1",
+		Pid:     1,
+		Root:    "root",
+	}
+	timeout := time.Second
+
+	cmdHook := configs.NewCommandHook(configs.Command{
+		Path:    os.Args[0],
+		Args:    []string{os.Args[0], "-test.run=TestHelperProcess"},
+		Env:     []string{"FOO=BAR"},
+		Dir:     "/",
+		Timeout: &timeout,
+	})
+
+	err := cmdHook.Run(state)
+	if err != nil {
+		t.Errorf(fmt.Sprintf("Expected error to not occur but it was %+v", err))
+	}
+}
+
+func TestCommandHookRunTimeout(t *testing.T) {
+	state := configs.HookState{
+		Version: "1",
+		ID:      "1",
+		Pid:     1,
+		Root:    "root",
+	}
+	timeout := (10 * time.Millisecond)
+
+	cmdHook := configs.NewCommandHook(configs.Command{
+		Path:    os.Args[0],
+		Args:    []string{os.Args[0], "-test.run=TestHelperProcessWithTimeout"},
+		Env:     []string{"FOO=BAR"},
+		Dir:     "/",
+		Timeout: &timeout,
+	})
+
+	err := cmdHook.Run(state)
+	if err == nil {
+		t.Error("Expected error to occur but it was nil")
+	}
+}
+
+func TestHelperProcess(*testing.T) {
+	fmt.Println("Helper Process")
+	os.Exit(0)
+}
+func TestHelperProcessWithTimeout(*testing.T) {
+	time.Sleep(time.Second)
+}

vendor/github.com/opencontainers/runc/libcontainer/configs/config_unix.go

@@ -0,0 +1,51 @@
+// +build freebsd linux
+
+package configs
+
+import "fmt"
+
+// HostUID gets the root uid for the process on host which could be non-zero
+// when user namespaces are enabled.
+func (c Config) HostUID() (int, error) {
+	if c.Namespaces.Contains(NEWUSER) {
+		if c.UidMappings == nil {
+			return -1, fmt.Errorf("User namespaces enabled, but no user mappings found.")
+		}
+		id, found := c.hostIDFromMapping(0, c.UidMappings)
+		if !found {
+			return -1, fmt.Errorf("User namespaces enabled, but no root user mapping found.")
+		}
+		return id, nil
+	}
+	// Return default root uid 0
+	return 0, nil
+}
+
+// HostGID gets the root gid for the process on host which could be non-zero
+// when user namespaces are enabled.
+func (c Config) HostGID() (int, error) {
+	if c.Namespaces.Contains(NEWUSER) {
+		if c.GidMappings == nil {
+			return -1, fmt.Errorf("User namespaces enabled, but no gid mappings found.")
+		}
+		id, found := c.hostIDFromMapping(0, c.GidMappings)
+		if !found {
+			return -1, fmt.Errorf("User namespaces enabled, but no root group mapping found.")
+		}
+		return id, nil
+	}
+	// Return default root gid 0
+	return 0, nil
+}
+
+// Utility function that gets a host ID for a container ID from user namespace map
+// if that ID is present in the map.
+func (c Config) hostIDFromMapping(containerID int, uMap []IDMap) (int, bool) {
+	for _, m := range uMap {
+		if (containerID >= m.ContainerID) && (containerID <= (m.ContainerID + m.Size - 1)) {
+			hostID := m.HostID + (containerID - m.ContainerID)
+			return hostID, true
+		}
+	}
+	return -1, false
+}

vendor/github.com/opencontainers/runc/libcontainer/configs/config_unix_test.go

@@ -0,0 +1,132 @@
+// +build linux freebsd
+
+package configs
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func loadConfig(name string) (*Config, error) {
+	f, err := os.Open(filepath.Join("../sample_configs", name))
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	var container *Config
+	if err := json.NewDecoder(f).Decode(&container); err != nil {
+		return nil, err
+	}
+
+	// Check that a config doesn't contain extra fields
+	var configMap, abstractMap map[string]interface{}
+
+	if _, err := f.Seek(0, 0); err != nil {
+		return nil, err
+	}
+
+	if err := json.NewDecoder(f).Decode(&abstractMap); err != nil {
+		return nil, err
+	}
+
+	configData, err := json.Marshal(&container)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := json.Unmarshal(configData, &configMap); err != nil {
+		return nil, err
+	}
+
+	for k := range configMap {
+		delete(abstractMap, k)
+	}
+
+	if len(abstractMap) != 0 {
+		return nil, fmt.Errorf("unknown fields: %s", abstractMap)
+	}
+
+	return container, nil
+}
+
+func TestRemoveNamespace(t *testing.T) {
+	ns := Namespaces{
+		{Type: NEWNET},
+	}
+	if !ns.Remove(NEWNET) {
+		t.Fatal("NEWNET was not removed")
+	}
+	if len(ns) != 0 {
+		t.Fatalf("namespaces should have 0 items but reports %d", len(ns))
+	}
+}
+
+func TestHostUIDNoUSERNS(t *testing.T) {
+	config := &Config{
+		Namespaces: Namespaces{},
+	}
+	uid, err := config.HostUID()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if uid != 0 {
+		t.Fatalf("expected uid 0 with no USERNS but received %d", uid)
+	}
+}
+
+func TestHostUIDWithUSERNS(t *testing.T) {
+	config := &Config{
+		Namespaces: Namespaces{{Type: NEWUSER}},
+		UidMappings: []IDMap{
+			{
+				ContainerID: 0,
+				HostID:      1000,
+				Size:        1,
+			},
+		},
+	}
+	uid, err := config.HostUID()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if uid != 1000 {
+		t.Fatalf("expected uid 1000 with no USERNS but received %d", uid)
+	}
+}
+
+func TestHostGIDNoUSERNS(t *testing.T) {
+	config := &Config{
+		Namespaces: Namespaces{},
+	}
+	uid, err := config.HostGID()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if uid != 0 {
+		t.Fatalf("expected gid 0 with no USERNS but received %d", uid)
+	}
+}
+
+func TestHostGIDWithUSERNS(t *testing.T) {
+	config := &Config{
+		Namespaces: Namespaces{{Type: NEWUSER}},
+		GidMappings: []IDMap{
+			{
+				ContainerID: 0,
+				HostID:      1000,
+				Size:        1,
+			},
+		},
+	}
+	uid, err := config.HostGID()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if uid != 1000 {
+		t.Fatalf("expected gid 1000 with no USERNS but received %d", uid)
+	}
+}

vendor/github.com/opencontainers/runc/libcontainer/configs/config_windows_test.go

@@ -0,0 +1,3 @@
+package configs
+
+// All current tests are for Unix-specific functionality

vendor/github.com/opencontainers/runc/libcontainer/configs/device.go

@@ -0,0 +1,57 @@
+package configs
+
+import (
+	"fmt"
+	"os"
+)
+
+const (
+	Wildcard = -1
+)
+
+// TODO Windows: This can be factored out in the future
+
+type Device struct {
+	// Device type, block, char, etc.
+	Type rune `json:"type"`
+
+	// Path to the device.
+	Path string `json:"path"`
+
+	// Major is the device's major number.
+	Major int64 `json:"major"`
+
+	// Minor is the device's minor number.
+	Minor int64 `json:"minor"`
+
+	// Cgroup permissions format, rwm.
+	Permissions string `json:"permissions"`
+
+	// FileMode permission bits for the device.
+	FileMode os.FileMode `json:"file_mode"`
+
+	// Uid of the device.
+	Uid uint32 `json:"uid"`
+
+	// Gid of the device.
+	Gid uint32 `json:"gid"`
+
+	// Write the file to the allowed list
+	Allow bool `json:"allow"`
+}
+
+func (d *Device) CgroupString() string {
+	return fmt.Sprintf("%c %s:%s %s", d.Type, deviceNumberString(d.Major), deviceNumberString(d.Minor), d.Permissions)
+}
+
+func (d *Device) Mkdev() int {
+	return int((d.Major << 8) | (d.Minor & 0xff) | ((d.Minor & 0xfff00) << 12))
+}
+
+// deviceNumberString converts the device number to a string return result.
+func deviceNumberString(number int64) string {
+	if number == Wildcard {
+		return "*"
+	}
+	return fmt.Sprint(number)
+}

vendor/github.com/opencontainers/runc/libcontainer/configs/device_defaults.go

@@ -0,0 +1,111 @@
+// +build linux freebsd
+
+package configs
+
+var (
+	// DefaultSimpleDevices are devices that are to be both allowed and created.
+	DefaultSimpleDevices = []*Device{
+		// /dev/null and zero
+		{
+			Path:        "/dev/null",
+			Type:        'c',
+			Major:       1,
+			Minor:       3,
+			Permissions: "rwm",
+			FileMode:    0666,
+		},
+		{
+			Path:        "/dev/zero",
+			Type:        'c',
+			Major:       1,
+			Minor:       5,
+			Permissions: "rwm",
+			FileMode:    0666,
+		},
+
+		{
+			Path:        "/dev/full",
+			Type:        'c',
+			Major:       1,
+			Minor:       7,
+			Permissions: "rwm",
+			FileMode:    0666,
+		},
+
+		// consoles and ttys
+		{
+			Path:        "/dev/tty",
+			Type:        'c',
+			Major:       5,
+			Minor:       0,
+			Permissions: "rwm",
+			FileMode:    0666,
+		},
+
+		// /dev/urandom,/dev/random
+		{
+			Path:        "/dev/urandom",
+			Type:        'c',
+			Major:       1,
+			Minor:       9,
+			Permissions: "rwm",
+			FileMode:    0666,
+		},
+		{
+			Path:        "/dev/random",
+			Type:        'c',
+			Major:       1,
+			Minor:       8,
+			Permissions: "rwm",
+			FileMode:    0666,
+		},
+	}
+	DefaultAllowedDevices = append([]*Device{
+		// allow mknod for any device
+		{
+			Type:        'c',
+			Major:       Wildcard,
+			Minor:       Wildcard,
+			Permissions: "m",
+		},
+		{
+			Type:        'b',
+			Major:       Wildcard,
+			Minor:       Wildcard,
+			Permissions: "m",
+		},
+
+		{
+			Path:        "/dev/console",
+			Type:        'c',
+			Major:       5,
+			Minor:       1,
+			Permissions: "rwm",
+		},
+		// /dev/pts/ - pts namespaces are "coming soon"
+		{
+			Path:        "",
+			Type:        'c',
+			Major:       136,
+			Minor:       Wildcard,
+			Permissions: "rwm",
+		},
+		{
+			Path:        "",
+			Type:        'c',
+			Major:       5,
+			Minor:       2,
+			Permissions: "rwm",
+		},
+
+		// tuntap
+		{
+			Path:        "",
+			Type:        'c',
+			Major:       10,
+			Minor:       200,
+			Permissions: "rwm",
+		},
+	}, DefaultSimpleDevices...)
+	DefaultAutoCreatedDevices = append([]*Device{}, DefaultSimpleDevices...)
+)

vendor/github.com/opencontainers/runc/libcontainer/configs/hugepage_limit.go

@@ -0,0 +1,9 @@
+package configs
+
+type HugepageLimit struct {
+	// which type of hugepage to limit.
+	Pagesize string `json:"page_size"`
+
+	// usage limit for hugepage.
+	Limit uint64 `json:"limit"`
+}

vendor/github.com/opencontainers/runc/libcontainer/configs/interface_priority_map.go

@@ -0,0 +1,14 @@
+package configs
+
+import (
+	"fmt"
+)
+
+type IfPrioMap struct {
+	Interface string `json:"interface"`
+	Priority  int64  `json:"priority"`
+}
+
+func (i *IfPrioMap) CgroupString() string {
+	return fmt.Sprintf("%s %d", i.Interface, i.Priority)
+}

vendor/github.com/opencontainers/runc/libcontainer/configs/mount.go

@@ -0,0 +1,39 @@
+package configs
+
+const (
+	// EXT_COPYUP is a directive to copy up the contents of a directory when
+	// a tmpfs is mounted over it.
+	EXT_COPYUP = 1 << iota
+)
+
+type Mount struct {
+	// Source path for the mount.
+	Source string `json:"source"`
+
+	// Destination path for the mount inside the container.
+	Destination string `json:"destination"`
+
+	// Device the mount is for.
+	Device string `json:"device"`
+
+	// Mount flags.
+	Flags int `json:"flags"`
+
+	// Propagation Flags
+	PropagationFlags []int `json:"propagation_flags"`
+
+	// Mount data applied to the mount.
+	Data string `json:"data"`
+
+	// Relabel source if set, "z" indicates shared, "Z" indicates unshared.
+	Relabel string `json:"relabel"`
+
+	// Extensions are additional flags that are specific to runc.
+	Extensions int `json:"extensions"`
+
+	// Optional Command to be run before Source is mounted.
+	PremountCmds []Command `json:"premount_cmds"`
+
+	// Optional Command to be run after Source is mounted.
+	PostmountCmds []Command `json:"postmount_cmds"`
+}

vendor/github.com/opencontainers/runc/libcontainer/configs/namespaces.go

@@ -0,0 +1,5 @@
+package configs
+
+type NamespaceType string
+
+type Namespaces []Namespace

vendor/github.com/opencontainers/runc/libcontainer/configs/namespaces_syscall.go

@@ -0,0 +1,31 @@
+// +build linux
+
+package configs
+
+import "syscall"
+
+func (n *Namespace) Syscall() int {
+	return namespaceInfo[n.Type]
+}
+
+var namespaceInfo = map[NamespaceType]int{
+	NEWNET:  syscall.CLONE_NEWNET,
+	NEWNS:   syscall.CLONE_NEWNS,
+	NEWUSER: syscall.CLONE_NEWUSER,
+	NEWIPC:  syscall.CLONE_NEWIPC,
+	NEWUTS:  syscall.CLONE_NEWUTS,
+	NEWPID:  syscall.CLONE_NEWPID,
+}
+
+// CloneFlags parses the container's Namespaces options to set the correct
+// flags on clone, unshare. This function returns flags only for new namespaces.
+func (n *Namespaces) CloneFlags() uintptr {
+	var flag int
+	for _, v := range *n {
+		if v.Path != "" {
+			continue
+		}
+		flag |= namespaceInfo[v.Type]
+	}
+	return uintptr(flag)
+}

vendor/github.com/opencontainers/runc/libcontainer/configs/namespaces_syscall_unsupported.go

@@ -0,0 +1,15 @@
+// +build !linux,!windows
+
+package configs
+
+func (n *Namespace) Syscall() int {
+	panic("No namespace syscall support")
+	return 0
+}
+
+// CloneFlags parses the container's Namespaces options to set the correct
+// flags on clone, unshare. This function returns flags only for new namespaces.
+func (n *Namespaces) CloneFlags() uintptr {
+	panic("No namespace syscall support")
+	return uintptr(0)
+}

vendor/github.com/opencontainers/runc/libcontainer/configs/namespaces_unix.go

@@ -0,0 +1,127 @@
+// +build linux freebsd
+
+package configs
+
+import (
+	"fmt"
+	"os"
+	"sync"
+)
+
+const (
+	NEWNET  NamespaceType = "NEWNET"
+	NEWPID  NamespaceType = "NEWPID"
+	NEWNS   NamespaceType = "NEWNS"
+	NEWUTS  NamespaceType = "NEWUTS"
+	NEWIPC  NamespaceType = "NEWIPC"
+	NEWUSER NamespaceType = "NEWUSER"
+)
+
+var (
+	nsLock              sync.Mutex
+	supportedNamespaces = make(map[NamespaceType]bool)
+)
+
+// NsName converts the namespace type to its filename
+func NsName(ns NamespaceType) string {
+	switch ns {
+	case NEWNET:
+		return "net"
+	case NEWNS:
+		return "mnt"
+	case NEWPID:
+		return "pid"
+	case NEWIPC:
+		return "ipc"
+	case NEWUSER:
+		return "user"
+	case NEWUTS:
+		return "uts"
+	}
+	return ""
+}
+
+// IsNamespaceSupported returns whether a namespace is available or
+// not
+func IsNamespaceSupported(ns NamespaceType) bool {
+	nsLock.Lock()
+	defer nsLock.Unlock()
+	supported, ok := supportedNamespaces[ns]
+	if ok {
+		return supported
+	}
+	nsFile := NsName(ns)
+	// if the namespace type is unknown, just return false
+	if nsFile == "" {
+		return false
+	}
+	_, err := os.Stat(fmt.Sprintf("/proc/self/ns/%s", nsFile))
+	// a namespace is supported if it exists and we have permissions to read it
+	supported = err == nil
+	supportedNamespaces[ns] = supported
+	return supported
+}
+
+func NamespaceTypes() []NamespaceType {
+	return []NamespaceType{
+		NEWNET,
+		NEWPID,
+		NEWNS,
+		NEWUTS,
+		NEWIPC,
+		NEWUSER,
+	}
+}
+
+// Namespace defines configuration for each namespace.  It specifies an
+// alternate path that is able to be joined via setns.
+type Namespace struct {
+	Type NamespaceType `json:"type"`
+	Path string        `json:"path"`
+}
+
+func (n *Namespace) GetPath(pid int) string {
+	if n.Path != "" {
+		return n.Path
+	}
+	return fmt.Sprintf("/proc/%d/ns/%s", pid, NsName(n.Type))
+}
+
+func (n *Namespaces) Remove(t NamespaceType) bool {
+	i := n.index(t)
+	if i == -1 {
+		return false
+	}
+	*n = append((*n)[:i], (*n)[i+1:]...)
+	return true
+}
+
+func (n *Namespaces) Add(t NamespaceType, path string) {
+	i := n.index(t)
+	if i == -1 {
+		*n = append(*n, Namespace{Type: t, Path: path})
+		return
+	}
+	(*n)[i].Path = path
+}
+
+func (n *Namespaces) index(t NamespaceType) int {
+	for i, ns := range *n {
+		if ns.Type == t {
+			return i
+		}
+	}
+	return -1
+}
+
+func (n *Namespaces) Contains(t NamespaceType) bool {
+	return n.index(t) != -1
+}
+
+func (n *Namespaces) PathOf(t NamespaceType) string {
+	i := n.index(t)
+	if i == -1 {
+		return ""
+	}
+	return (*n)[i].Path
+}

vendor/github.com/opencontainers/runc/libcontainer/configs/namespaces_unsupported.go

@@ -0,0 +1,8 @@
+// +build !linux,!freebsd
+
+package configs
+
+// Namespace defines configuration for each namespace.  It specifies an
+// alternate path that is able to be joined via setns.
+type Namespace struct {
+}

vendor/github.com/opencontainers/runc/libcontainer/configs/network.go

@@ -0,0 +1,72 @@
+package configs
+
+// Network defines configuration for a container's networking stack
+//
+// The network configuration can be omitted from a container causing the
+// container to be setup with the host's networking stack
+type Network struct {
+	// Type sets the networks type, commonly veth and loopback
+	Type string `json:"type"`
+
+	// Name of the network interface
+	Name string `json:"name"`
+
+	// The bridge to use.
+	Bridge string `json:"bridge"`
+
+	// MacAddress contains the MAC address to set on the network interface
+	MacAddress string `json:"mac_address"`
+
+	// Address contains the IPv4 and mask to set on the network interface
+	Address string `json:"address"`
+
+	// Gateway sets the gateway address that is used as the default for the interface
+	Gateway string `json:"gateway"`
+
+	// IPv6Address contains the IPv6 and mask to set on the network interface
+	IPv6Address string `json:"ipv6_address"`
+
+	// IPv6Gateway sets the ipv6 gateway address that is used as the default for the interface
+	IPv6Gateway string `json:"ipv6_gateway"`
+
+	// Mtu sets the mtu value for the interface and will be mirrored on both the host and
+	// container's interfaces if a pair is created, specifically in the case of type veth
+	// Note: This does not apply to loopback interfaces.
+	Mtu int `json:"mtu"`
+
+	// TxQueueLen sets the tx_queuelen value for the interface and will be mirrored on both the host and
+	// container's interfaces if a pair is created, specifically in the case of type veth
+	// Note: This does not apply to loopback interfaces.
+	TxQueueLen int `json:"txqueuelen"`
+
+	// HostInterfaceName is a unique name of a veth pair that resides on in the host interface of the
+	// container.
+	HostInterfaceName string `json:"host_interface_name"`
+
+	// HairpinMode specifies if hairpin NAT should be enabled on the virtual interface
+	// bridge port in the case of type veth
+	// Note: This is unsupported on some systems.
+	// Note: This does not apply to loopback interfaces.
+	HairpinMode bool `json:"hairpin_mode"`
+}
+
+// Routes can be specified to create entries in the route table as the container is started
+//
+// All of destination, source, and gateway should be either IPv4 or IPv6.
+// One of the three options must be present, and omitted entries will use their
+// IP family default for the route table.  For IPv4 for example, setting the
+// gateway to 1.2.3.4 and the interface to eth0 will set up a standard
+// destination of 0.0.0.0(or *) when viewed in the route table.
+type Route struct {
+	// Sets the destination and mask, should be a CIDR.  Accepts IPv4 and IPv6
+	Destination string `json:"destination"`
+
+	// Sets the source and mask, should be a CIDR.  Accepts IPv4 and IPv6
+	Source string `json:"source"`
+
+	// Sets the gateway.  Accepts IPv4 and IPv6
+	Gateway string `json:"gateway"`
+
+	// The device to set this route up for, for example: eth0
+	InterfaceName string `json:"interface_name"`
+}

vendor/github.com/opencontainers/runc/libcontainer/configs/validate/validator.go

@@ -0,0 +1,168 @@
+package validate
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/opencontainers/runc/libcontainer/configs"
+	"github.com/opencontainers/runc/libcontainer/selinux"
+)
+
+type Validator interface {
+	Validate(*configs.Config) error
+}
+
+func New() Validator {
+	return &ConfigValidator{}
+}
+
+type ConfigValidator struct {
+}
+
+func (v *ConfigValidator) Validate(config *configs.Config) error {
+	if err := v.rootfs(config); err != nil {
+		return err
+	}
+	if err := v.network(config); err != nil {
+		return err
+	}
+	if err := v.hostname(config); err != nil {
+		return err
+	}
+	if err := v.security(config); err != nil {
+		return err
+	}
+	if err := v.usernamespace(config); err != nil {
+		return err
+	}
+	if err := v.sysctl(config); err != nil {
+		return err
+	}
+	return nil
+}
+
+// rootfs validates if the rootfs is an absolute path and is not a symlink
+// to the container's root filesystem.
+func (v *ConfigValidator) rootfs(config *configs.Config) error {
+	if _, err := os.Stat(config.Rootfs); err != nil {
+		if os.IsNotExist(err) {
+			return fmt.Errorf("rootfs (%s) does not exist", config.Rootfs)
+		}
+		return err
+	}
+	cleaned, err := filepath.Abs(config.Rootfs)
+	if err != nil {
+		return err
+	}
+	if cleaned, err = filepath.EvalSymlinks(cleaned); err != nil {
+		return err
+	}
+	if filepath.Clean(config.Rootfs) != cleaned {
+		return fmt.Errorf("%s is not an absolute path or is a symlink", config.Rootfs)
+	}
+	return nil
+}
+
+func (v *ConfigValidator) network(config *configs.Config) error {
+	if !config.Namespaces.Contains(configs.NEWNET) {
+		if len(config.Networks) > 0 || len(config.Routes) > 0 {
+			return fmt.Errorf("unable to apply network settings without a private NET namespace")
+		}
+	}
+	return nil
+}
+
+func (v *ConfigValidator) hostname(config *configs.Config) error {
+	if config.Hostname != "" && !config.Namespaces.Contains(configs.NEWUTS) {
+		return fmt.Errorf("unable to set hostname without a private UTS namespace")
+	}
+	return nil
+}
+
+func (v *ConfigValidator) security(config *configs.Config) error {
+	// restrict sys without mount namespace
+	if (len(config.MaskPaths) > 0 || len(config.ReadonlyPaths) > 0) &&
+		!config.Namespaces.Contains(configs.NEWNS) {
+		return fmt.Errorf("unable to restrict sys entries without a private MNT namespace")
+	}
+	if config.ProcessLabel != "" && !selinux.SelinuxEnabled() {
+		return fmt.Errorf("selinux label is specified in config, but selinux is disabled or not supported")
+	}
+
+	return nil
+}
+
+func (v *ConfigValidator) usernamespace(config *configs.Config) error {
+	if config.Namespaces.Contains(configs.NEWUSER) {
+		if _, err := os.Stat("/proc/self/ns/user"); os.IsNotExist(err) {
+			return fmt.Errorf("USER namespaces aren't enabled in the kernel")
+		}
+	} else {
+		if config.UidMappings != nil || config.GidMappings != nil {
+			return fmt.Errorf("User namespace mappings specified, but USER namespace isn't enabled in the config")
+		}
+	}
+	return nil
+}
+
+// sysctl validates that the specified sysctl keys are valid or not.
+// /proc/sys isn't completely namespaced and depending on which namespaces
+// are specified, a subset of sysctls are permitted.
+func (v *ConfigValidator) sysctl(config *configs.Config) error {
+	validSysctlMap := map[string]bool{
+		"kernel.msgmax":          true,
+		"kernel.msgmnb":          true,
+		"kernel.msgmni":          true,
+		"kernel.sem":             true,
+		"kernel.shmall":          true,
+		"kernel.shmmax":          true,
+		"kernel.shmmni":          true,
+		"kernel.shm_rmid_forced": true,
+	}
+
+	for s := range config.Sysctl {
+		if validSysctlMap[s] || strings.HasPrefix(s, "fs.mqueue.") {
+			if config.Namespaces.Contains(configs.NEWIPC) {
+				continue
+			} else {
+				return fmt.Errorf("sysctl %q is not allowed in the hosts ipc namespace", s)
+			}
+		}
+		if strings.HasPrefix(s, "net.") {
+			if config.Namespaces.Contains(configs.NEWNET) {
+				if path := config.Namespaces.PathOf(configs.NEWNET); path != "" {
+					if err := checkHostNs(s, path); err != nil {
+						return err
+					}
+				}
+				continue
+			} else {
+				return fmt.Errorf("sysctl %q is not allowed in the hosts network namespace", s)
+			}
+		}
+		return fmt.Errorf("sysctl %q is not in a separate kernel namespace", s)
+	}
+
+	return nil
+}
+
+// checkHostNs checks whether network sysctl is used in host namespace.
+func checkHostNs(sysctlConfig string, path string) error {
+	var currentProcessNetns = "/proc/self/ns/net"
+	// readlink on the current processes network namespace
+	destOfCurrentProcess, err := os.Readlink(currentProcessNetns)
+	if err != nil {
+		return fmt.Errorf("read soft link %q error", currentProcessNetns)
+	}
+	// readlink on the path provided in the struct
+	destOfContainer, err := os.Readlink(path)
+	if err != nil {
+		return fmt.Errorf("read soft link %q error", path)
+	}
+	if destOfContainer == destOfCurrentProcess {
+		return fmt.Errorf("sysctl %q is not allowed in the hosts network namespace", sysctlConfig)
+	}
+	return nil
+}

vendor/github.com/opencontainers/runc/libcontainer/configs/validate/validator_test.go

@@ -0,0 +1,267 @@
+package validate_test
+
+import (
+	"os"
+	"testing"
+
+	"github.com/opencontainers/runc/libcontainer/configs"
+	"github.com/opencontainers/runc/libcontainer/configs/validate"
+)
+
+func TestValidate(t *testing.T) {
+	config := &configs.Config{
+		Rootfs: "/var",
+	}
+
+	validator := validate.New()
+	err := validator.Validate(config)
+	if err != nil {
+		t.Errorf("Expected error to not occur: %+v", err)
+	}
+}
+
+func TestValidateWithInvalidRootfs(t *testing.T) {
+	dir := "rootfs"
+	os.Symlink("/var", dir)
+	defer os.Remove(dir)
+
+	config := &configs.Config{
+		Rootfs: dir,
+	}
+
+	validator := validate.New()
+	err := validator.Validate(config)
+	if err == nil {
+		t.Error("Expected error to occur but it was nil")
+	}
+}
+
+func TestValidateNetworkWithoutNETNamespace(t *testing.T) {
+	network := &configs.Network{Type: "loopback"}
+	config := &configs.Config{
+		Rootfs:     "/var",
+		Namespaces: []configs.Namespace{},
+		Networks:   []*configs.Network{network},
+	}
+
+	validator := validate.New()
+	err := validator.Validate(config)
+	if err == nil {
+		t.Error("Expected error to occur but it was nil")
+	}
+}
+
+func TestValidateNetworkRoutesWithoutNETNamespace(t *testing.T) {
+	route := &configs.Route{Gateway: "255.255.255.0"}
+	config := &configs.Config{
+		Rootfs:     "/var",
+		Namespaces: []configs.Namespace{},
+		Routes:     []*configs.Route{route},
+	}
+
+	validator := validate.New()
+	err := validator.Validate(config)
+	if err == nil {
+		t.Error("Expected error to occur but it was nil")
+	}
+}
+
+func TestValidateHostname(t *testing.T) {
+	config := &configs.Config{
+		Rootfs:   "/var",
+		Hostname: "runc",
+		Namespaces: configs.Namespaces(
+			[]configs.Namespace{
+				{Type: configs.NEWUTS},
+			},
+		),
+	}
+
+	validator := validate.New()
+	err := validator.Validate(config)
+	if err != nil {
+		t.Errorf("Expected error to not occur: %+v", err)
+	}
+}
+
+func TestValidateHostnameWithoutUTSNamespace(t *testing.T) {
+	config := &configs.Config{
+		Rootfs:   "/var",
+		Hostname: "runc",
+	}
+
+	validator := validate.New()
+	err := validator.Validate(config)
+	if err == nil {
+		t.Error("Expected error to occur but it was nil")
+	}
+}
+
+func TestValidateSecurityWithMaskPaths(t *testing.T) {
+	config := &configs.Config{
+		Rootfs:    "/var",
+		MaskPaths: []string{"/proc/kcore"},
+		Namespaces: configs.Namespaces(
+			[]configs.Namespace{
+				{Type: configs.NEWNS},
+			},
+		),
+	}
+
+	validator := validate.New()
+	err := validator.Validate(config)
+	if err != nil {
+		t.Errorf("Expected error to not occur: %+v", err)
+	}
+}
+
+func TestValidateSecurityWithROPaths(t *testing.T) {
+	config := &configs.Config{
+		Rootfs:        "/var",
+		ReadonlyPaths: []string{"/proc/sys"},
+		Namespaces: configs.Namespaces(
+			[]configs.Namespace{
+				{Type: configs.NEWNS},
+			},
+		),
+	}
+
+	validator := validate.New()
+	err := validator.Validate(config)
+	if err != nil {
+		t.Errorf("Expected error to not occur: %+v", err)
+	}
+}
+
+func TestValidateSecurityWithoutNEWNS(t *testing.T) {
+	config := &configs.Config{
+		Rootfs:        "/var",
+		MaskPaths:     []string{"/proc/kcore"},
+		ReadonlyPaths: []string{"/proc/sys"},
+	}
+
+	validator := validate.New()
+	err := validator.Validate(config)
+	if err == nil {
+		t.Error("Expected error to occur but it was nil")
+	}
+}
+
+func TestValidateUsernamespace(t *testing.T) {
+	if _, err := os.Stat("/proc/self/ns/user"); os.IsNotExist(err) {
+		t.Skip("userns is unsupported")
+	}
+	config := &configs.Config{
+		Rootfs: "/var",
+		Namespaces: configs.Namespaces(
+			[]configs.Namespace{
+				{Type: configs.NEWUSER},
+			},
+		),
+	}
+
+	validator := validate.New()
+	err := validator.Validate(config)
+	if err != nil {
+		t.Errorf("expected error to not occur %+v", err)
+	}
+}
+
+func TestValidateUsernamespaceWithoutUserNS(t *testing.T) {
+	uidMap := configs.IDMap{ContainerID: 123}
+	config := &configs.Config{
+		Rootfs:      "/var",
+		UidMappings: []configs.IDMap{uidMap},
+	}
+
+	validator := validate.New()
+	err := validator.Validate(config)
+	if err == nil {
+		t.Error("Expected error to occur but it was nil")
+	}
+}
+
+func TestValidateSysctl(t *testing.T) {
+	sysctl := map[string]string{
+		"fs.mqueue.ctl": "ctl",
+		"net.ctl":       "ctl",
+		"kernel.ctl":    "ctl",
+	}
+
+	for k, v := range sysctl {
+		config := &configs.Config{
+			Rootfs: "/var",
+			Sysctl: map[string]string{k: v},
+		}
+
+		validator := validate.New()
+		err := validator.Validate(config)
+		if err == nil {
+			t.Error("Expected error to occur but it was nil")
+		}
+	}
+}
+
+func TestValidateValidSysctl(t *testing.T) {
+	sysctl := map[string]string{
+		"fs.mqueue.ctl": "ctl",
+		"net.ctl":       "ctl",
+		"kernel.msgmax": "ctl",
+	}
+
+	for k, v := range sysctl {
+		config := &configs.Config{
+			Rootfs: "/var",
+			Sysctl: map[string]string{k: v},
+			Namespaces: []configs.Namespace{
+				{
+					Type: configs.NEWNET,
+				},
+				{
+					Type: configs.NEWIPC,
+				},
+			},
+		}
+
+		validator := validate.New()
+		err := validator.Validate(config)
+		if err != nil {
+			t.Errorf("Expected error to not occur with {%s=%s} but got: %q", k, v, err)
+		}
+	}
+}
+
+func TestValidateSysctlWithSameNs(t *testing.T) {
+	config := &configs.Config{
+		Rootfs: "/var",
+		Sysctl: map[string]string{"net.ctl": "ctl"},
+		Namespaces: configs.Namespaces(
+			[]configs.Namespace{
+				{
+					Type: configs.NEWNET,
+					Path: "/proc/self/ns/net",
+				},
+			},
+		),
+	}
+
+	validator := validate.New()
+	err := validator.Validate(config)
+	if err == nil {
+		t.Error("Expected error to occur but it was nil")
+	}
+}
+
+func TestValidateSysctlWithoutNETNamespace(t *testing.T) {
+	config := &configs.Config{
+		Rootfs:     "/var",
+		Sysctl:     map[string]string{"net.ctl": "ctl"},
+		Namespaces: []configs.Namespace{},
+	}
+
+	validator := validate.New()
+	err := validator.Validate(config)
+	if err == nil {
+		t.Error("Expected error to occur but it was nil")
+	}
+}

vendor/github.com/opencontainers/runc/libcontainer/console.go

@@ -0,0 +1,14 @@
+package libcontainer
+
+import "io"
+
+// Console represents a pseudo TTY.
+type Console interface {
+	io.ReadWriteCloser
+
+	// Path returns the filesystem path to the slave side of the pty.
+	Path() string
+
+	// Fd returns the fd for the master of the pty.
+	Fd() uintptr
+}

vendor/github.com/opencontainers/runc/libcontainer/console_freebsd.go

@@ -0,0 +1,13 @@
+// +build freebsd
+
+package libcontainer
+
+import (
+	"errors"
+)
+
+// NewConsole returns an initialized console that can be used within a container by copying bytes
+// from the master side to the slave that is attached as the tty for the container's init process.
+func NewConsole(uid, gid int) (Console, error) {
+	return nil, errors.New("libcontainer console is not supported on FreeBSD")
+}

vendor/github.com/opencontainers/runc/libcontainer/console_linux.go

@@ -0,0 +1,171 @@
+package libcontainer
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"syscall"
+	"unsafe"
+
+	"github.com/opencontainers/runc/libcontainer/label"
+)
+
+// NewConsole returns an initialized console that can be used within a container by copying bytes
+// from the master side to the slave that is attached as the tty for the container's init process.
+func NewConsole(uid, gid int) (Console, error) {
+	master, err := os.OpenFile("/dev/ptmx", syscall.O_RDWR|syscall.O_NOCTTY|syscall.O_CLOEXEC, 0)
+	if err != nil {
+		return nil, err
+	}
+	if err := saneTerminal(master); err != nil {
+		return nil, err
+	}
+	console, err := ptsname(master)
+	if err != nil {
+		return nil, err
+	}
+	if err := unlockpt(master); err != nil {
+		return nil, err
+	}
+	if err := os.Chmod(console, 0600); err != nil {
+		return nil, err
+	}
+	if err := os.Chown(console, uid, gid); err != nil {
+		return nil, err
+	}
+	return &linuxConsole{
+		slavePath: console,
+		master:    master,
+	}, nil
+}
+
+// newConsoleFromPath is an internal function returning an initialized console for use inside
+// a container's MNT namespace.
+func newConsoleFromPath(slavePath string) *linuxConsole {
+	return &linuxConsole{
+		slavePath: slavePath,
+	}
+}
+
+// linuxConsole is a linux pseudo TTY for use within a container.
+type linuxConsole struct {
+	master    *os.File
+	slavePath string
+}
+
+func (c *linuxConsole) Fd() uintptr {
+	return c.master.Fd()
+}
+
+func (c *linuxConsole) Path() string {
+	return c.slavePath
+}
+
+func (c *linuxConsole) Read(b []byte) (int, error) {
+	return c.master.Read(b)
+}
+
+func (c *linuxConsole) Write(b []byte) (int, error) {
+	return c.master.Write(b)
+}
+
+func (c *linuxConsole) Close() error {
+	if m := c.master; m != nil {
+		return m.Close()
+	}
+	return nil
+}
+
+// mount initializes the console inside the rootfs mounting with the specified mount label
+// and applying the correct ownership of the console.
+func (c *linuxConsole) mount(rootfs, mountLabel string) error {
+	oldMask := syscall.Umask(0000)
+	defer syscall.Umask(oldMask)
+	if err := label.SetFileLabel(c.slavePath, mountLabel); err != nil {
+		return err
+	}
+	dest := filepath.Join(rootfs, "/dev/console")
+	f, err := os.Create(dest)
+	if err != nil && !os.IsExist(err) {
+		return err
+	}
+	if f != nil {
+		f.Close()
+	}
+	return syscall.Mount(c.slavePath, dest, "bind", syscall.MS_BIND, "")
+}
+
+// dupStdio opens the slavePath for the console and dups the fds to the current
+// processes stdio, fd 0,1,2.
+func (c *linuxConsole) dupStdio() error {
+	slave, err := c.open(syscall.O_RDWR)
+	if err != nil {
+		return err
+	}
+	fd := int(slave.Fd())
+	for _, i := range []int{0, 1, 2} {
+		if err := syscall.Dup3(fd, i, 0); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// open is a clone of os.OpenFile without the O_CLOEXEC used to open the pty slave.
+func (c *linuxConsole) open(flag int) (*os.File, error) {
+	r, e := syscall.Open(c.slavePath, flag, 0)
+	if e != nil {
+		return nil, &os.PathError{
+			Op:   "open",
+			Path: c.slavePath,
+			Err:  e,
+		}
+	}
+	return os.NewFile(uintptr(r), c.slavePath), nil
+}
+
+func ioctl(fd uintptr, flag, data uintptr) error {
+	if _, _, err := syscall.Syscall(syscall.SYS_IOCTL, fd, flag, data); err != 0 {
+		return err
+	}
+	return nil
+}
+
+// unlockpt unlocks the slave pseudoterminal device corresponding to the master pseudoterminal referred to by f.
+// unlockpt should be called before opening the slave side of a pty.
+func unlockpt(f *os.File) error {
+	var u int32
+	return ioctl(f.Fd(), syscall.TIOCSPTLCK, uintptr(unsafe.Pointer(&u)))
+}
+
+// ptsname retrieves the name of the first available pts for the given master.
+func ptsname(f *os.File) (string, error) {
+	var n int32
+	if err := ioctl(f.Fd(), syscall.TIOCGPTN, uintptr(unsafe.Pointer(&n))); err != nil {
+		return "", err
+	}
+	return fmt.Sprintf("/dev/pts/%d", n), nil
+}
+
+// saneTerminal sets the necessary tty_ioctl(4)s to ensure that a pty pair
+// created by us acts normally. In particular, a not-very-well-known default of
+// Linux unix98 ptys is that they have +onlcr by default. While this isn't a
+// problem for terminal emulators, because we relay data from the terminal we
+// also relay that funky line discipline.
+func saneTerminal(terminal *os.File) error {
+	// Go doesn't have a wrapper for any of the termios ioctls.
+	var termios syscall.Termios
+
+	if err := ioctl(terminal.Fd(), syscall.TCGETS, uintptr(unsafe.Pointer(&termios))); err != nil {
+		return fmt.Errorf("ioctl(tty, tcgets): %s", err.Error())
+	}
+
+	// Set -onlcr so we don't have to deal with \r.
+	termios.Oflag &^= syscall.ONLCR
+
+	if err := ioctl(terminal.Fd(), syscall.TCSETS, uintptr(unsafe.Pointer(&termios))); err != nil {
+		return fmt.Errorf("ioctl(tty, tcsets): %s", err.Error())
+	}
+
+	return nil
+}

vendor/github.com/opencontainers/runc/libcontainer/console_solaris.go

@@ -0,0 +1,11 @@
+package libcontainer
+
+import (
+	"errors"
+)
+
+// NewConsole returns an initialized console that can be used within a container by copying bytes
+// from the master side to the slave that is attached as the tty for the container's init process.
+func NewConsole(uid, gid int) (Console, error) {
+	return nil, errors.New("libcontainer console is not supported on Solaris")
+}

vendor/github.com/opencontainers/runc/libcontainer/console_windows.go

@@ -0,0 +1,30 @@
+package libcontainer
+
+// NewConsole returns an initialized console that can be used within a container
+func NewConsole(uid, gid int) (Console, error) {
+	return &windowsConsole{}, nil
+}
+
+// windowsConsole is a Windows pseudo TTY for use within a container.
+type windowsConsole struct {
+}
+
+func (c *windowsConsole) Fd() uintptr {
+	return 0
+}
+
+func (c *windowsConsole) Path() string {
+	return ""
+}
+
+func (c *windowsConsole) Read(b []byte) (int, error) {
+	return 0, nil
+}
+
+func (c *windowsConsole) Write(b []byte) (int, error) {
+	return 0, nil
+}
+
+func (c *windowsConsole) Close() error {
+	return nil
+}

vendor/github.com/opencontainers/runc/libcontainer/container.go

@@ -0,0 +1,160 @@
+// Package libcontainer provides a native Go implementation for creating containers
+// with namespaces, cgroups, capabilities, and filesystem access controls.
+// It allows you to manage the lifecycle of the container performing additional operations
+// after the container is created.
+package libcontainer
+
+import (
+	"os"
+	"time"
+
+	"github.com/opencontainers/runc/libcontainer/configs"
+)
+
+// Status is the status of a container.
+type Status int
+
+const (
+	// Created is the status that denotes the container exists but has not been run yet.
+	Created Status = iota
+	// Running is the status that denotes the container exists and is running.
+	Running
+	// Pausing is the status that denotes the container exists, it is in the process of being paused.
+	Pausing
+	// Paused is the status that denotes the container exists, but all its processes are paused.
+	Paused
+	// Stopped is the status that denotes the container does not have a created or running process.
+	Stopped
+)
+
+func (s Status) String() string {
+	switch s {
+	case Created:
+		return "created"
+	case Running:
+		return "running"
+	case Pausing:
+		return "pausing"
+	case Paused:
+		return "paused"
+	case Stopped:
+		return "stopped"
+	default:
+		return "unknown"
+	}
+}
+
+// BaseState represents the platform agnostic pieces relating to a
+// running container's state
+type BaseState struct {
+	// ID is the container ID.
+	ID string `json:"id"`
+
+	// InitProcessPid is the init process id in the parent namespace.
+	InitProcessPid int `json:"init_process_pid"`
+
+	// InitProcessStartTime is the init process start time in clock cycles since boot time.
+	InitProcessStartTime string `json:"init_process_start"`
+
+	// Created is the unix timestamp for the creation time of the container in UTC
+	Created time.Time `json:"created"`
+
+	// Config is the container's configuration.
+	Config configs.Config `json:"config"`
+}
+
+// BaseContainer is a libcontainer container object.
+//
+// Each container is thread-safe within the same process. Since a container can
+// be destroyed by a separate process, any function may return that the container
+// was not found. BaseContainer includes methods that are platform agnostic.
+type BaseContainer interface {
+	// Returns the ID of the container
+	ID() string
+
+	// Returns the current status of the container.
+	//
+	// errors:
+	// ContainerNotExists - Container no longer exists,
+	// Systemerror - System error.
+	Status() (Status, error)
+
+	// State returns the current container's state information.
+	//
+	// errors:
+	// SystemError - System error.
+	State() (*State, error)
+
+	// Returns the current config of the container.
+	Config() configs.Config
+
+	// Returns the PIDs inside this container. The PIDs are in the namespace of the calling process.
+	//
+	// errors:
+	// ContainerNotExists - Container no longer exists,
+	// Systemerror - System error.
+	//
+	// Some of the returned PIDs may no longer refer to processes in the Container, unless
+	// the Container state is PAUSED in which case every PID in the slice is valid.
+	Processes() ([]int, error)
+
+	// Returns statistics for the container.
+	//
+	// errors:
+	// ContainerNotExists - Container no longer exists,
+	// Systemerror - System error.
+	Stats() (*Stats, error)
+
+	// Set resources of container as configured
+	//
+	// We can use this to change resources when containers are running.
+	//
+	// errors:
+	// SystemError - System error.
+	Set(config configs.Config) error
+
+	// Start a process inside the container. Returns error if process fails to
+	// start. You can track process lifecycle with passed Process structure.
+	//
+	// errors:
+	// ContainerNotExists - Container no longer exists,
+	// ConfigInvalid - config is invalid,
+	// ContainerPaused - Container is paused,
+	// SystemError - System error.
+	Start(process *Process) (err error)
+
+	// Run immediately starts the process inside the container.  Returns error if process
+	// fails to start.  It does not block waiting for the exec fifo  after start returns but
+	// opens the fifo after start returns.
+	//
+	// errors:
+	// ContainerNotExists - Container no longer exists,
+	// ConfigInvalid - config is invalid,
+	// ContainerPaused - Container is paused,
+	// SystemError - System error.
+	Run(process *Process) (err error)
+
+	// Destroys the container after killing all running processes.
+	//
+	// Any event registrations are removed before the container is destroyed.
+	// No error is returned if the container is already destroyed.
+	//
+	// errors:
+	// SystemError - System error.
+	Destroy() error
+
+	// Signal sends the provided signal code to the container's initial process.
+	//
+	// If all is specified the signal is sent to all processes in the container
+	// including the initial process.
+	//
+	// errors:
+	// SystemError - System error.
+	Signal(s os.Signal, all bool) error
+
+	// Exec signals the container to exec the users process at the end of the init.
+	//
+	// errors:
+	// SystemError - System error.
+	Exec() error
+}

vendor/github.com/opencontainers/runc/libcontainer/container_linux_test.go

@@ -0,0 +1,218 @@
+// +build linux
+
+package libcontainer
+
+import (
+	"fmt"
+	"os"
+	"testing"
+
+	"github.com/opencontainers/runc/libcontainer/cgroups"
+	"github.com/opencontainers/runc/libcontainer/configs"
+)
+
+type mockCgroupManager struct {
+	pids    []int
+	allPids []int
+	stats   *cgroups.Stats
+	paths   map[string]string
+}
+
+func (m *mockCgroupManager) GetPids() ([]int, error) {
+	return m.pids, nil
+}
+
+func (m *mockCgroupManager) GetAllPids() ([]int, error) {
+	return m.allPids, nil
+}
+
+func (m *mockCgroupManager) GetStats() (*cgroups.Stats, error) {
+	return m.stats, nil
+}
+
+func (m *mockCgroupManager) Apply(pid int) error {
+	return nil
+}
+
+func (m *mockCgroupManager) Set(container *configs.Config) error {
+	return nil
+}
+
+func (m *mockCgroupManager) Destroy() error {
+	return nil
+}
+
+func (m *mockCgroupManager) GetPaths() map[string]string {
+	return m.paths
+}
+
+func (m *mockCgroupManager) Freeze(state configs.FreezerState) error {
+	return nil
+}
+
+type mockProcess struct {
+	_pid    int
+	started string
+}
+
+func (m *mockProcess) terminate() error {
+	return nil
+}
+
+func (m *mockProcess) pid() int {
+	return m._pid
+}
+
+func (m *mockProcess) startTime() (string, error) {
+	return m.started, nil
+}
+
+func (m *mockProcess) start() error {
+	return nil
+}
+
+func (m *mockProcess) wait() (*os.ProcessState, error) {
+	return nil, nil
+}
+
+func (m *mockProcess) signal(_ os.Signal) error {
+	return nil
+}
+
+func (m *mockProcess) externalDescriptors() []string {
+	return []string{}
+}
+
+func (m *mockProcess) setExternalDescriptors(newFds []string) {
+}
+
+func TestGetContainerPids(t *testing.T) {
+	container := &linuxContainer{
+		id:            "myid",
+		config:        &configs.Config{},
+		cgroupManager: &mockCgroupManager{allPids: []int{1, 2, 3}},
+	}
+	pids, err := container.Processes()
+	if err != nil {
+		t.Fatal(err)
+	}
+	for i, expected := range []int{1, 2, 3} {
+		if pids[i] != expected {
+			t.Fatalf("expected pid %d but received %d", expected, pids[i])
+		}
+	}
+}
+
+func TestGetContainerStats(t *testing.T) {
+	container := &linuxContainer{
+		id:     "myid",
+		config: &configs.Config{},
+		cgroupManager: &mockCgroupManager{
+			pids: []int{1, 2, 3},
+			stats: &cgroups.Stats{
+				MemoryStats: cgroups.MemoryStats{
+					Usage: cgroups.MemoryData{
+						Usage: 1024,
+					},
+				},
+			},
+		},
+	}
+	stats, err := container.Stats()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if stats.CgroupStats == nil {
+		t.Fatal("cgroup stats are nil")
+	}
+	if stats.CgroupStats.MemoryStats.Usage.Usage != 1024 {
+		t.Fatalf("expected memory usage 1024 but recevied %d", stats.CgroupStats.MemoryStats.Usage.Usage)
+	}
+}
+
+func TestGetContainerState(t *testing.T) {
+	var (
+		pid                 = os.Getpid()
+		expectedMemoryPath  = "/sys/fs/cgroup/memory/myid"
+		expectedNetworkPath = "/networks/fd"
+	)
+	container := &linuxContainer{
+		id: "myid",
+		config: &configs.Config{
+			Namespaces: []configs.Namespace{
+				{Type: configs.NEWPID},
+				{Type: configs.NEWNS},
+				{Type: configs.NEWNET, Path: expectedNetworkPath},
+				{Type: configs.NEWUTS},
+				// emulate host for IPC
+				//{Type: configs.NEWIPC},
+			},
+		},
+		initProcess: &mockProcess{
+			_pid:    pid,
+			started: "010",
+		},
+		cgroupManager: &mockCgroupManager{
+			pids: []int{1, 2, 3},
+			stats: &cgroups.Stats{
+				MemoryStats: cgroups.MemoryStats{
+					Usage: cgroups.MemoryData{
+						Usage: 1024,
+					},
+				},
+			},
+			paths: map[string]string{
+				"memory": expectedMemoryPath,
+			},
+		},
+	}
+	container.state = &createdState{c: container}
+	state, err := container.State()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if state.InitProcessPid != pid {
+		t.Fatalf("expected pid %d but received %d", pid, state.InitProcessPid)
+	}
+	if state.InitProcessStartTime != "010" {
+		t.Fatalf("expected process start time 010 but received %s", state.InitProcessStartTime)
+	}
+	paths := state.CgroupPaths
+	if paths == nil {
+		t.Fatal("cgroup paths should not be nil")
+	}
+	if memPath := paths["memory"]; memPath != expectedMemoryPath {
+		t.Fatalf("expected memory path %q but received %q", expectedMemoryPath, memPath)
+	}
+	for _, ns := range container.config.Namespaces {
+		path := state.NamespacePaths[ns.Type]
+		if path == "" {
+			t.Fatalf("expected non nil namespace path for %s", ns.Type)
+		}
+		if ns.Type == configs.NEWNET {
+			if path != expectedNetworkPath {
+				t.Fatalf("expected path %q but received %q", expectedNetworkPath, path)
+			}
+		} else {
+			file := ""
+			switch ns.Type {
+			case configs.NEWNET:
+				file = "net"
+			case configs.NEWNS:
+				file = "mnt"
+			case configs.NEWPID:
+				file = "pid"
+			case configs.NEWIPC:
+				file = "ipc"
+			case configs.NEWUSER:
+				file = "user"
+			case configs.NEWUTS:
+				file = "uts"
+			}
+			expected := fmt.Sprintf("/proc/%d/ns/%s", pid, file)
+			if expected != path {
+				t.Fatalf("expected path %q but received %q", expected, path)
+			}
+		}
+	}
+}

vendor/github.com/opencontainers/runc/libcontainer/container_solaris.go

@@ -0,0 +1,20 @@
+package libcontainer
+
+// State represents a running container's state
+type State struct {
+	BaseState
+
+	// Platform specific fields below here
+}
+
+// A libcontainer container object.
+//
+// Each container is thread-safe within the same process. Since a container can
+// be destroyed by a separate process, any function may return that the container
+// was not found.
+type Container interface {
+	BaseContainer
+
+	// Methods below here are platform specific
+
+}

vendor/github.com/opencontainers/runc/libcontainer/container_windows.go

@@ -0,0 +1,20 @@
+package libcontainer
+
+// State represents a running container's state
+type State struct {
+	BaseState
+
+	// Platform specific fields below here
+}
+
+// A libcontainer container object.
+//
+// Each container is thread-safe within the same process. Since a container can
+// be destroyed by a separate process, any function may return that the container
+// was not found.
+type Container interface {
+	BaseContainer
+
+	// Methods below here are platform specific
+
+}

vendor/github.com/opencontainers/runc/libcontainer/criu_opts_unix.go

@@ -0,0 +1,37 @@
+// +build linux freebsd
+
+package libcontainer
+
+// cgroup restoring strategy provided by criu
+type cgMode uint32
+
+const (
+	CRIU_CG_MODE_SOFT    cgMode = 3 + iota // restore cgroup properties if only dir created by criu
+	CRIU_CG_MODE_FULL                      // always restore all cgroups and their properties
+	CRIU_CG_MODE_STRICT                    // restore all, requiring them to not present in the system
+	CRIU_CG_MODE_DEFAULT                   // the same as CRIU_CG_MODE_SOFT
+)
+
+type CriuPageServerInfo struct {
+	Address string // IP address of CRIU page server
+	Port    int32  // port number of CRIU page server
+}
+
+type VethPairName struct {
+	ContainerInterfaceName string
+	HostInterfaceName      string
+}
+
+type CriuOpts struct {
+	ImagesDirectory         string             // directory for storing image files
+	WorkDirectory           string             // directory to cd and write logs/pidfiles/stats to
+	LeaveRunning            bool               // leave container in running state after checkpoint
+	TcpEstablished          bool               // checkpoint/restore established TCP connections
+	ExternalUnixConnections bool               // allow external unix connections
+	ShellJob                bool               // allow to dump and restore shell jobs
+	FileLocks               bool               // handle file locks, for safety
+	PageServer              CriuPageServerInfo // allow to dump to criu page server
+	VethPairs               []VethPairName     // pass the veth to criu when restore
+	ManageCgroupsMode       cgMode             // dump or restore cgroup mode
+	EmptyNs                 uint32             // don't c/r properties for namespace from this mask
+}

vendor/github.com/opencontainers/runc/libcontainer/criu_opts_windows.go

@@ -0,0 +1,6 @@
+package libcontainer
+
+// TODO Windows: This can ultimately be entirely factored out as criu is
+// a Unix concept not relevant on Windows.
+type CriuOpts struct {
+}

vendor/github.com/opencontainers/runc/libcontainer/criurpc/Makefile

@@ -0,0 +1,2 @@
+gen: criurpc.proto
+	protoc --go_out=. criurpc.proto

vendor/github.com/opencontainers/runc/libcontainer/criurpc/criurpc.proto

@@ -0,0 +1,174 @@
+message criu_page_server_info {
+	optional string		address	= 1;
+	optional int32		port	= 2;
+	optional int32		pid	= 3;
+	optional int32		fd	= 4;
+}
+
+message criu_veth_pair {
+	required string		if_in	= 1;
+	required string		if_out	= 2;
+};
+
+message ext_mount_map {
+	required string		key	= 1;
+	required string		val	= 2;
+};
+
+message inherit_fd {
+	required string		key	= 1;
+	required int32		fd	= 2;
+};
+
+message cgroup_root {
+	optional string		ctrl	= 1;
+	required string		path	= 2;
+};
+
+message unix_sk {
+	required uint32		inode 	= 1;
+};
+
+enum criu_cg_mode {
+	IGNORE	= 0;
+	NONE	= 1;
+	PROPS	= 2;
+	SOFT	= 3;
+	FULL	= 4;
+	STRICT	= 5;
+	DEFAULT = 6;
+};
+
+message criu_opts {
+	required int32			images_dir_fd	= 1;
+	optional int32			pid		= 2; /* if not set on dump, will dump requesting process */
+
+	optional bool			leave_running	= 3;
+	optional bool			ext_unix_sk	= 4;
+	optional bool			tcp_established	= 5;
+	optional bool			evasive_devices	= 6;
+	optional bool			shell_job	= 7;
+	optional bool			file_locks	= 8;
+	optional int32			log_level	= 9 [default = 2];
+	optional string			log_file	= 10; /* No subdirs are allowed. Consider using work-dir */
+
+	optional criu_page_server_info	ps		= 11;
+
+	optional bool			notify_scripts	= 12;
+
+	optional string			root		= 13;
+	optional string			parent_img	= 14;
+	optional bool			track_mem	= 15;
+	optional bool			auto_dedup	= 16;
+
+	optional int32			work_dir_fd	= 17;
+	optional bool			link_remap	= 18;
+	repeated criu_veth_pair		veths		= 19;
+
+	optional uint32			cpu_cap		= 20 [default = 0xffffffff];
+	optional bool			force_irmap	= 21;
+	repeated string			exec_cmd	= 22;
+
+	repeated ext_mount_map		ext_mnt		= 23;
+	optional bool			manage_cgroups	= 24; /* backward compatibility */
+	repeated cgroup_root		cg_root		= 25;
+
+	optional bool			rst_sibling	= 26; /* swrk only */
+	repeated inherit_fd		inherit_fd	= 27; /* swrk only */
+
+	optional bool			auto_ext_mnt	= 28;
+	optional bool			ext_sharing 	= 29;
+	optional bool			ext_masters	= 30;
+
+	repeated string			skip_mnt	= 31;
+	repeated string			enable_fs	= 32;
+
+	repeated unix_sk                unix_sk_ino     = 33;
+
+	optional criu_cg_mode		manage_cgroups_mode = 34;
+	optional uint32			ghost_limit	= 35 [default = 0x100000];
+	repeated string			irmap_scan_paths = 36;
+	repeated string			external	= 37;
+	optional uint32			empty_ns	= 38;
+	optional bool			no_seccomp	= 39;
+}
+
+message criu_dump_resp {
+	optional bool restored		= 1;
+}
+
+message criu_restore_resp {
+	required int32 pid		= 1;
+}
+
+message criu_notify {
+	optional string script		= 1;
+	optional int32	pid		= 2;
+}
+
+enum criu_req_type {
+	EMPTY		= 0;
+	DUMP		= 1;
+	RESTORE		= 2;
+	CHECK		= 3;
+	PRE_DUMP	= 4;
+	PAGE_SERVER	= 5;
+
+	NOTIFY		= 6;
+
+	CPUINFO_DUMP	= 7;
+	CPUINFO_CHECK	= 8;
+
+	FEATURE_CHECK	= 9;
+}
+
+/*
+ * List of features which can queried via
+ * CRIU_REQ_TYPE__FEATURE_CHECK
+ */
+message criu_features {
+	optional bool			mem_track	= 1;
+}
+
+/*
+ * Request -- each type corresponds to must-be-there
+ * request arguments of respective type
+ */
+
+message criu_req {
+	required criu_req_type		type		= 1;
+
+	optional criu_opts		opts		= 2;
+	optional bool			notify_success	= 3;
+
+	/*
+	 * When set service won't close the connection but
+	 * will wait for more req-s to appear. Works not
+	 * for all request types.
+	 */
+	optional bool			keep_open	= 4;
+	/*
+	 * 'features' can be used to query which features
+	 * are supported by the installed criu/kernel
+	 * via RPC.
+	 */
+	optional criu_features		features	= 5;
+}
+
+/*
+ * Response -- it states whether the request was served
+ * and additional request-specific information
+ */
+
+message criu_resp {
+	required criu_req_type		type		= 1;
+	required bool			success		= 2;
+
+	optional criu_dump_resp		dump		= 3;
+	optional criu_restore_resp	restore		= 4;
+	optional criu_notify		notify		= 5;
+	optional criu_page_server_info	ps		= 6;
+
+	optional int32			cr_errno	= 7;
+	optional criu_features		features	= 8;
+}

vendor/github.com/opencontainers/runc/libcontainer/devices/devices_test.go

@@ -0,0 +1,63 @@
+// +build linux freebsd
+
+package devices
+
+import (
+	"errors"
+	"os"
+	"testing"
+)
+
+func TestDeviceFromPathLstatFailure(t *testing.T) {
+	testError := errors.New("test error")
+
+	// Override os.Lstat to inject error.
+	osLstat = func(path string) (os.FileInfo, error) {
+		return nil, testError
+	}
+
+	_, err := DeviceFromPath("", "")
+	if err != testError {
+		t.Fatalf("Unexpected error %v, expected %v", err, testError)
+	}
+}
+
+func TestHostDevicesIoutilReadDirFailure(t *testing.T) {
+	testError := errors.New("test error")
+
+	// Override ioutil.ReadDir to inject error.
+	ioutilReadDir = func(dirname string) ([]os.FileInfo, error) {
+		return nil, testError
+	}
+
+	_, err := HostDevices()
+	if err != testError {
+		t.Fatalf("Unexpected error %v, expected %v", err, testError)
+	}
+}
+
+func TestHostDevicesIoutilReadDirDeepFailure(t *testing.T) {
+	testError := errors.New("test error")
+	called := false
+
+	// Override ioutil.ReadDir to inject error after the first call.
+	ioutilReadDir = func(dirname string) ([]os.FileInfo, error) {
+		if called {
+			return nil, testError
+		}
+		called = true
+
+		// Provoke a second call.
+		fi, err := os.Lstat("/tmp")
+		if err != nil {
+			t.Fatalf("Unexpected error %v", err)
+		}
+
+		return []os.FileInfo{fi}, nil
+	}
+
+	_, err := HostDevices()
+	if err != testError {
+		t.Fatalf("Unexpected error %v, expected %v", err, testError)
+	}
+}

vendor/github.com/opencontainers/runc/libcontainer/devices/devices_unix.go

@@ -0,0 +1,102 @@
+// +build linux freebsd
+
+package devices
+
+import (
+	"errors"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"syscall"
+
+	"github.com/opencontainers/runc/libcontainer/configs"
+)
+
+var (
+	ErrNotADevice = errors.New("not a device node")
+)
+
+// Testing dependencies
+var (
+	osLstat       = os.Lstat
+	ioutilReadDir = ioutil.ReadDir
+)
+
+// Given the path to a device and its cgroup_permissions(which cannot be easily queried) look up the information about a linux device and return that information as a Device struct.
+func DeviceFromPath(path, permissions string) (*configs.Device, error) {
+	fileInfo, err := osLstat(path)
+	if err != nil {
+		return nil, err
+	}
+	var (
+		devType                rune
+		mode                   = fileInfo.Mode()
+		fileModePermissionBits = os.FileMode.Perm(mode)
+	)
+	switch {
+	case mode&os.ModeDevice == 0:
+		return nil, ErrNotADevice
+	case mode&os.ModeCharDevice != 0:
+		fileModePermissionBits |= syscall.S_IFCHR
+		devType = 'c'
+	default:
+		fileModePermissionBits |= syscall.S_IFBLK
+		devType = 'b'
+	}
+	stat_t, ok := fileInfo.Sys().(*syscall.Stat_t)
+	if !ok {
+		return nil, fmt.Errorf("cannot determine the device number for device %s", path)
+	}
+	devNumber := int(stat_t.Rdev)
+	return &configs.Device{
+		Type:        devType,
+		Path:        path,
+		Major:       Major(devNumber),
+		Minor:       Minor(devNumber),
+		Permissions: permissions,
+		FileMode:    fileModePermissionBits,
+		Uid:         stat_t.Uid,
+		Gid:         stat_t.Gid,
+	}, nil
+}
+
+func HostDevices() ([]*configs.Device, error) {
+	return getDevices("/dev")
+}
+
+func getDevices(path string) ([]*configs.Device, error) {
+	files, err := ioutilReadDir(path)
+	if err != nil {
+		return nil, err
+	}
+	out := []*configs.Device{}
+	for _, f := range files {
+		switch {
+		case f.IsDir():
+			switch f.Name() {
+			case "pts", "shm", "fd", "mqueue":
+				continue
+			default:
+				sub, err := getDevices(filepath.Join(path, f.Name()))
+				if err != nil {
+					return nil, err
+				}
+
+				out = append(out, sub...)
+				continue
+			}
+		case f.Name() == "console":
+			continue
+		}
+		device, err := DeviceFromPath(filepath.Join(path, f.Name()), "rwm")
+		if err != nil {
+			if err == ErrNotADevice {
+				continue
+			}
+			return nil, err
+		}
+		out = append(out, device)
+	}
+	return out, nil
+}

vendor/github.com/opencontainers/runc/libcontainer/devices/devices_unsupported.go

@@ -0,0 +1,3 @@
+// +build windows
+
+package devices

vendor/github.com/opencontainers/runc/libcontainer/devices/number.go

@@ -0,0 +1,24 @@
+// +build linux freebsd
+
+package devices
+
+/*
+
+This code provides support for manipulating linux device numbers.  It should be replaced by normal syscall functions once http://code.google.com/p/go/issues/detail?id=8106 is solved.
+
+You can read what they are here:
+
+ - http://www.makelinux.net/ldd3/chp-3-sect-2
+ - http://www.linux-tutorial.info/modules.php?name=MContent&pageid=94
+
+Note! These are NOT the same as the MAJOR(dev_t device);, MINOR(dev_t device); and MKDEV(int major, int minor); functions as defined in <linux/kdev_t.h> as the representation of device numbers used by go is different than the one used internally to the kernel! - https://github.com/torvalds/linux/blob/master/include/linux/kdev_t.h#L9
+
+*/
+
+func Major(devNumber int) int64 {
+	return int64((devNumber >> 8) & 0xfff)
+}
+
+func Minor(devNumber int) int64 {
+	return int64((devNumber & 0xff) | ((devNumber >> 12) & 0xfff00))
+}

vendor/github.com/opencontainers/runc/libcontainer/error.go

@@ -0,0 +1,70 @@
+package libcontainer
+
+import "io"
+
+// ErrorCode is the API error code type.
+type ErrorCode int
+
+// API error codes.
+const (
+	// Factory errors
+	IdInUse ErrorCode = iota
+	InvalidIdFormat
+
+	// Container errors
+	ContainerNotExists
+	ContainerPaused
+	ContainerNotStopped
+	ContainerNotRunning
+	ContainerNotPaused
+
+	// Process errors
+	NoProcessOps
+
+	// Common errors
+	ConfigInvalid
+	ConsoleExists
+	SystemError
+)
+
+func (c ErrorCode) String() string {
+	switch c {
+	case IdInUse:
+		return "Id already in use"
+	case InvalidIdFormat:
+		return "Invalid format"
+	case ContainerPaused:
+		return "Container paused"
+	case ConfigInvalid:
+		return "Invalid configuration"
+	case SystemError:
+		return "System error"
+	case ContainerNotExists:
+		return "Container does not exist"
+	case ContainerNotStopped:
+		return "Container is not stopped"
+	case ContainerNotRunning:
+		return "Container is not running"
+	case ConsoleExists:
+		return "Console exists for process"
+	case ContainerNotPaused:
+		return "Container is not paused"
+	case NoProcessOps:
+		return "No process operations"
+	default:
+		return "Unknown error"
+	}
+}
+
+// Error is the API error type.
+type Error interface {
+	error
+
+	// Returns a verbose string including the error message
+	// and a representation of the stack trace suitable for
+	// printing.
+	Detail(w io.Writer) error
+
+	// Returns the error code for this error.
+	Code() ErrorCode
+}

vendor/github.com/opencontainers/runc/libcontainer/error_test.go

@@ -0,0 +1,25 @@
+package libcontainer
+
+import "testing"
+
+func TestErrorCode(t *testing.T) {
+	codes := map[ErrorCode]string{
+		IdInUse:             "Id already in use",
+		InvalidIdFormat:     "Invalid format",
+		ContainerPaused:     "Container paused",
+		ConfigInvalid:       "Invalid configuration",
+		SystemError:         "System error",
+		ContainerNotExists:  "Container does not exist",
+		ContainerNotStopped: "Container is not stopped",
+		ContainerNotRunning: "Container is not running",
+		ConsoleExists:       "Console exists for process",
+		ContainerNotPaused:  "Container is not paused",
+		NoProcessOps:        "No process operations",
+	}
+
+	for code, expected := range codes {
+		if actual := code.String(); actual != expected {
+			t.Fatalf("expected string %q but received %q", expected, actual)
+		}
+	}
+}

vendor/github.com/opencontainers/runc/libcontainer/factory.go

@@ -0,0 +1,45 @@
+package libcontainer
+
+import (
+	"github.com/opencontainers/runc/libcontainer/configs"
+)
+
+type Factory interface {
+	// Creates a new container with the given id and starts the initial process inside it.
+	// id must be a string containing only letters, digits and underscores and must contain
+	// between 1 and 1024 characters, inclusive.
+	//
+	// The id must not already be in use by an existing container. Containers created using
+	// a factory with the same path (and file system) must have distinct ids.
+	//
+	// Returns the new container with a running process.
+	//
+	// errors:
+	// IdInUse - id is already in use by a container
+	// InvalidIdFormat - id has incorrect format
+	// ConfigInvalid - config is invalid
+	// Systemerror - System error
+	//
+	// On error, any partially created container parts are cleaned up (the operation is atomic).
+	Create(id string, config *configs.Config) (Container, error)
+
+	// Load takes an ID for an existing container and returns the container information
+	// from the state.  This presents a read only view of the container.
+	//
+	// errors:
+	// Path does not exist
+	// Container is stopped
+	// System error
+	Load(id string) (Container, error)
+
+	// StartInitialization is an internal API to libcontainer used during the reexec of the
+	// container.
+	//
+	// Errors:
+	// Pipe connection error
+	// System error
+	StartInitialization() error
+
+	// Type returns info string about factory type (e.g. lxc, libcontainer...)
+	Type() string
+}

vendor/github.com/opencontainers/runc/libcontainer/factory_linux.go

@@ -0,0 +1,306 @@
+// +build linux
+
+package libcontainer
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"path/filepath"
+	"regexp"
+	"runtime/debug"
+	"strconv"
+	"syscall"
+
+	"github.com/docker/docker/pkg/mount"
+	"github.com/opencontainers/runc/libcontainer/cgroups"
+	"github.com/opencontainers/runc/libcontainer/cgroups/fs"
+	"github.com/opencontainers/runc/libcontainer/cgroups/systemd"
+	"github.com/opencontainers/runc/libcontainer/configs"
+	"github.com/opencontainers/runc/libcontainer/configs/validate"
+	"github.com/opencontainers/runc/libcontainer/utils"
+)
+
+const (
+	stateFilename    = "state.json"
+	execFifoFilename = "exec.fifo"
+)
+
+var (
+	idRegex  = regexp.MustCompile(`^[\w+-\.]+$`)
+	maxIdLen = 1024
+)
+
+// InitArgs returns an options func to configure a LinuxFactory with the
+// provided init binary path and arguments.
+func InitArgs(args ...string) func(*LinuxFactory) error {
+	return func(l *LinuxFactory) error {
+		l.InitArgs = args
+		return nil
+	}
+}
+
+// SystemdCgroups is an options func to configure a LinuxFactory to return
+// containers that use systemd to create and manage cgroups.
+func SystemdCgroups(l *LinuxFactory) error {
+	l.NewCgroupsManager = func(config *configs.Cgroup, paths map[string]string) cgroups.Manager {
+		return &systemd.Manager{
+			Cgroups: config,
+			Paths:   paths,
+		}
+	}
+	return nil
+}
+
+// Cgroupfs is an options func to configure a LinuxFactory to return
+// containers that use the native cgroups filesystem implementation to
+// create and manage cgroups.
+func Cgroupfs(l *LinuxFactory) error {
+	l.NewCgroupsManager = func(config *configs.Cgroup, paths map[string]string) cgroups.Manager {
+		return &fs.Manager{
+			Cgroups: config,
+			Paths:   paths,
+		}
+	}
+	return nil
+}
+
+// TmpfsRoot is an option func to mount LinuxFactory.Root to tmpfs.
+func TmpfsRoot(l *LinuxFactory) error {
+	mounted, err := mount.Mounted(l.Root)
+	if err != nil {
+		return err
+	}
+	if !mounted {
+		if err := syscall.Mount("tmpfs", l.Root, "tmpfs", 0, ""); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// CriuPath returns an option func to configure a LinuxFactory with the
+// provided criupath
+func CriuPath(criupath string) func(*LinuxFactory) error {
+	return func(l *LinuxFactory) error {
+		l.CriuPath = criupath
+		return nil
+	}
+}
+
+// New returns a linux based container factory based in the root directory and
+// configures the factory with the provided option funcs.
+func New(root string, options ...func(*LinuxFactory) error) (Factory, error) {
+	if root != "" {
+		if err := os.MkdirAll(root, 0700); err != nil {
+			return nil, newGenericError(err, SystemError)
+		}
+	}
+	l := &LinuxFactory{
+		Root:      root,
+		InitArgs:  []string{"/proc/self/exe", "init"},
+		Validator: validate.New(),
+		CriuPath:  "criu",
+	}
+	Cgroupfs(l)
+	for _, opt := range options {
+		if err := opt(l); err != nil {
+			return nil, err
+		}
+	}
+	return l, nil
+}
+
+// LinuxFactory implements the default factory interface for linux based systems.
+type LinuxFactory struct {
+	// Root directory for the factory to store state.
+	Root string
+
+	// InitArgs are arguments for calling the init responsibilities for spawning
+	// a container.
+	InitArgs []string
+
+	// CriuPath is the path to the criu binary used for checkpoint and restore of
+	// containers.
+	CriuPath string
+
+	// Validator provides validation to container configurations.
+	Validator validate.Validator
+
+	// NewCgroupsManager returns an initialized cgroups manager for a single container.
+	NewCgroupsManager func(config *configs.Cgroup, paths map[string]string) cgroups.Manager
+}
+
+func (l *LinuxFactory) Create(id string, config *configs.Config) (Container, error) {
+	if l.Root == "" {
+		return nil, newGenericError(fmt.Errorf("invalid root"), ConfigInvalid)
+	}
+	if err := l.validateID(id); err != nil {
+		return nil, err
+	}
+	if err := l.Validator.Validate(config); err != nil {
+		return nil, newGenericError(err, ConfigInvalid)
+	}
+	uid, err := config.HostUID()
+	if err != nil {
+		return nil, newGenericError(err, SystemError)
+	}
+	gid, err := config.HostGID()
+	if err != nil {
+		return nil, newGenericError(err, SystemError)
+	}
+	containerRoot := filepath.Join(l.Root, id)
+	if _, err := os.Stat(containerRoot); err == nil {
+		return nil, newGenericError(fmt.Errorf("container with id exists: %v", id), IdInUse)
+	} else if !os.IsNotExist(err) {
+		return nil, newGenericError(err, SystemError)
+	}
+	if err := os.MkdirAll(containerRoot, 0711); err != nil {
+		return nil, newGenericError(err, SystemError)
+	}
+	if err := os.Chown(containerRoot, uid, gid); err != nil {
+		return nil, newGenericError(err, SystemError)
+	}
+	fifoName := filepath.Join(containerRoot, execFifoFilename)
+	oldMask := syscall.Umask(0000)
+	if err := syscall.Mkfifo(fifoName, 0622); err != nil {
+		syscall.Umask(oldMask)
+		return nil, newGenericError(err, SystemError)
+	}
+	syscall.Umask(oldMask)
+	if err := os.Chown(fifoName, uid, gid); err != nil {
+		return nil, newGenericError(err, SystemError)
+	}
+	c := &linuxContainer{
+		id:            id,
+		root:          containerRoot,
+		config:        config,
+		initArgs:      l.InitArgs,
+		criuPath:      l.CriuPath,
+		cgroupManager: l.NewCgroupsManager(config.Cgroups, nil),
+	}
+	c.state = &stoppedState{c: c}
+	return c, nil
+}
+
+func (l *LinuxFactory) Load(id string) (Container, error) {
+	if l.Root == "" {
+		return nil, newGenericError(fmt.Errorf("invalid root"), ConfigInvalid)
+	}
+	containerRoot := filepath.Join(l.Root, id)
+	state, err := l.loadState(containerRoot, id)
+	if err != nil {
+		return nil, err
+	}
+	r := &nonChildProcess{
+		processPid:       state.InitProcessPid,
+		processStartTime: state.InitProcessStartTime,
+		fds:              state.ExternalDescriptors,
+	}
+	c := &linuxContainer{
+		initProcess:          r,
+		initProcessStartTime: state.InitProcessStartTime,
+		id:                   id,
+		config:               &state.Config,
+		initArgs:             l.InitArgs,
+		criuPath:             l.CriuPath,
+		cgroupManager:        l.NewCgroupsManager(state.Config.Cgroups, state.CgroupPaths),
+		root:                 containerRoot,
+		created:              state.Created,
+	}
+	c.state = &loadedState{c: c}
+	if err := c.refreshState(); err != nil {
+		return nil, err
+	}
+	return c, nil
+}
+
+func (l *LinuxFactory) Type() string {
+	return "libcontainer"
+}
+
+// StartInitialization loads a container by opening the pipe fd from the parent to read the configuration and state
+// This is a low level implementation detail of the reexec and should not be consumed externally
+func (l *LinuxFactory) StartInitialization() (err error) {
+	var pipefd, rootfd int
+	for _, pair := range []struct {
+		k string
+		v *int
+	}{
+		{"_LIBCONTAINER_INITPIPE", &pipefd},
+		{"_LIBCONTAINER_STATEDIR", &rootfd},
+	} {
+
+		s := os.Getenv(pair.k)
+
+		i, err := strconv.Atoi(s)
+		if err != nil {
+			return fmt.Errorf("unable to convert %s=%s to int", pair.k, s)
+		}
+		*pair.v = i
+	}
+	var (
+		pipe = os.NewFile(uintptr(pipefd), "pipe")
+		it   = initType(os.Getenv("_LIBCONTAINER_INITTYPE"))
+	)
+	// clear the current process's environment to clean any libcontainer
+	// specific env vars.
+	os.Clearenv()
+
+	var i initer
+	defer func() {
+		// We have an error during the initialization of the container's init,
+		// send it back to the parent process in the form of an initError.
+		// If container's init successed, syscall.Exec will not return, hence
+		// this defer function will never be called.
+		if _, ok := i.(*linuxStandardInit); ok {
+			//  Synchronisation only necessary for standard init.
+			if werr := utils.WriteJSON(pipe, syncT{procError}); werr != nil {
+				fmt.Fprintln(os.Stderr, err)
+				return
+			}
+		}
+		if werr := utils.WriteJSON(pipe, newSystemError(err)); werr != nil {
+			fmt.Fprintln(os.Stderr, err)
+			return
+		}
+		// ensure that this pipe is always closed
+		pipe.Close()
+	}()
+	defer func() {
+		if e := recover(); e != nil {
+			err = fmt.Errorf("panic from initialization: %v, %v", e, string(debug.Stack()))
+		}
+	}()
+	i, err = newContainerInit(it, pipe, rootfd)
+	if err != nil {
+		return err
+	}
+	return i.Init()
+}
+
+func (l *LinuxFactory) loadState(root, id string) (*State, error) {
+	f, err := os.Open(filepath.Join(root, stateFilename))
+	if err != nil {
+		if os.IsNotExist(err) {
+			return nil, newGenericError(fmt.Errorf("container %q does not exist", id), ContainerNotExists)
+		}
+		return nil, newGenericError(err, SystemError)
+	}
+	defer f.Close()
+	var state *State
+	if err := json.NewDecoder(f).Decode(&state); err != nil {
+		return nil, newGenericError(err, SystemError)
+	}
+	return state, nil
+}
+
+func (l *LinuxFactory) validateID(id string) error {
+	if !idRegex.MatchString(id) {
+		return newGenericError(fmt.Errorf("invalid id format: %v", id), InvalidIdFormat)
+	}
+	if len(id) > maxIdLen {
+		return newGenericError(fmt.Errorf("invalid id format: %v", id), InvalidIdFormat)
+	}
+	return nil
+}

vendor/github.com/opencontainers/runc/libcontainer/factory_linux_test.go

@@ -0,0 +1,207 @@
+// +build linux
+
+package libcontainer
+
+import (
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"reflect"
+	"syscall"
+	"testing"
+
+	"github.com/docker/docker/pkg/mount"
+	"github.com/opencontainers/runc/libcontainer/configs"
+	"github.com/opencontainers/runc/libcontainer/utils"
+)
+
+func newTestRoot() (string, error) {
+	dir, err := ioutil.TempDir("", "libcontainer")
+	if err != nil {
+		return "", err
+	}
+	return dir, nil
+}
+
+func TestFactoryNew(t *testing.T) {
+	root, rerr := newTestRoot()
+	if rerr != nil {
+		t.Fatal(rerr)
+	}
+	defer os.RemoveAll(root)
+	factory, err := New(root, Cgroupfs)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if factory == nil {
+		t.Fatal("factory should not be nil")
+	}
+	lfactory, ok := factory.(*LinuxFactory)
+	if !ok {
+		t.Fatal("expected linux factory returned on linux based systems")
+	}
+	if lfactory.Root != root {
+		t.Fatalf("expected factory root to be %q but received %q", root, lfactory.Root)
+	}
+
+	if factory.Type() != "libcontainer" {
+		t.Fatalf("unexpected factory type: %q, expected %q", factory.Type(), "libcontainer")
+	}
+}
+
+func TestFactoryNewTmpfs(t *testing.T) {
+	root, rerr := newTestRoot()
+	if rerr != nil {
+		t.Fatal(rerr)
+	}
+	defer os.RemoveAll(root)
+	factory, err := New(root, Cgroupfs, TmpfsRoot)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if factory == nil {
+		t.Fatal("factory should not be nil")
+	}
+	lfactory, ok := factory.(*LinuxFactory)
+	if !ok {
+		t.Fatal("expected linux factory returned on linux based systems")
+	}
+	if lfactory.Root != root {
+		t.Fatalf("expected factory root to be %q but received %q", root, lfactory.Root)
+	}
+
+	if factory.Type() != "libcontainer" {
+		t.Fatalf("unexpected factory type: %q, expected %q", factory.Type(), "libcontainer")
+	}
+	mounted, err := mount.Mounted(lfactory.Root)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !mounted {
+		t.Fatalf("Factory Root is not mounted")
+	}
+	mounts, err := mount.GetMounts()
+	if err != nil {
+		t.Fatal(err)
+	}
+	var found bool
+	for _, m := range mounts {
+		if m.Mountpoint == lfactory.Root {
+			if m.Fstype != "tmpfs" {
+				t.Fatalf("Fstype of root: %s, expected %s", m.Fstype, "tmpfs")
+			}
+			if m.Source != "tmpfs" {
+				t.Fatalf("Source of root: %s, expected %s", m.Source, "tmpfs")
+			}
+			found = true
+		}
+	}
+	if !found {
+		t.Fatalf("Factory Root is not listed in mounts list")
+	}
+	defer syscall.Unmount(root, syscall.MNT_DETACH)
+}
+
+func TestFactoryLoadNotExists(t *testing.T) {
+	root, rerr := newTestRoot()
+	if rerr != nil {
+		t.Fatal(rerr)
+	}
+	defer os.RemoveAll(root)
+	factory, err := New(root, Cgroupfs)
+	if err != nil {
+		t.Fatal(err)
+	}
+	_, err = factory.Load("nocontainer")
+	if err == nil {
+		t.Fatal("expected nil error loading non-existing container")
+	}
+	lerr, ok := err.(Error)
+	if !ok {
+		t.Fatal("expected libcontainer error type")
+	}
+	if lerr.Code() != ContainerNotExists {
+		t.Fatalf("expected error code %s but received %s", ContainerNotExists, lerr.Code())
+	}
+}
+
+func TestFactoryLoadContainer(t *testing.T) {
+	root, err := newTestRoot()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(root)
+	// setup default container config and state for mocking
+	var (
+		id            = "1"
+		expectedHooks = &configs.Hooks{
+			Prestart: []configs.Hook{
+				configs.CommandHook{Command: configs.Command{Path: "prestart-hook"}},
+			},
+			Poststart: []configs.Hook{
+				configs.CommandHook{Command: configs.Command{Path: "poststart-hook"}},
+			},
+			Poststop: []configs.Hook{
+				unserializableHook{},
+				configs.CommandHook{Command: configs.Command{Path: "poststop-hook"}},
+			},
+		}
+		expectedConfig = &configs.Config{
+			Rootfs: "/mycontainer/root",
+			Hooks:  expectedHooks,
+		}
+		expectedState = &State{
+			BaseState: BaseState{
+				InitProcessPid: 1024,
+				Config:         *expectedConfig,
+			},
+		}
+	)
+	if err := os.Mkdir(filepath.Join(root, id), 0700); err != nil {
+		t.Fatal(err)
+	}
+	if err := marshal(filepath.Join(root, id, stateFilename), expectedState); err != nil {
+		t.Fatal(err)
+	}
+	factory, err := New(root, Cgroupfs)
+	if err != nil {
+		t.Fatal(err)
+	}
+	container, err := factory.Load(id)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if container.ID() != id {
+		t.Fatalf("expected container id %q but received %q", id, container.ID())
+	}
+	config := container.Config()
+	if config.Rootfs != expectedConfig.Rootfs {
+		t.Fatalf("expected rootfs %q but received %q", expectedConfig.Rootfs, config.Rootfs)
+	}
+	expectedHooks.Poststop = expectedHooks.Poststop[1:] // expect unserializable hook to be skipped
+	if !reflect.DeepEqual(config.Hooks, expectedHooks) {
+		t.Fatalf("expects hooks %q but received %q", expectedHooks, config.Hooks)
+	}
+	lcontainer, ok := container.(*linuxContainer)
+	if !ok {
+		t.Fatal("expected linux container on linux based systems")
+	}
+	if lcontainer.initProcess.pid() != expectedState.InitProcessPid {
+		t.Fatalf("expected init pid %d but received %d", expectedState.InitProcessPid, lcontainer.initProcess.pid())
+	}
+}
+
+func marshal(path string, v interface{}) error {
+	f, err := os.Create(path)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+	return utils.WriteJSON(f, v)
+}
+
+type unserializableHook struct{}
+
+func (unserializableHook) Run(configs.HookState) error {
+	return nil
+}

vendor/github.com/opencontainers/runc/libcontainer/generic_error.go

@@ -0,0 +1,106 @@
+package libcontainer
+
+import (
+	"fmt"
+	"io"
+	"text/template"
+	"time"
+
+	"github.com/opencontainers/runc/libcontainer/stacktrace"
+)
+
+type syncType uint8
+
+const (
+	procReady syncType = iota
+	procError
+	procRun
+	procHooks
+	procResume
+)
+
+type syncT struct {
+	Type syncType `json:"type"`
+}
+
+var errorTemplate = template.Must(template.New("error").Parse(`Timestamp: {{.Timestamp}}
+Code: {{.ECode}}
+{{if .Message }}
+Message: {{.Message}}
+{{end}}
+Frames:{{range $i, $frame := .Stack.Frames}}
+---
+{{$i}}: {{$frame.Function}}
+Package: {{$frame.Package}}
+File: {{$frame.File}}@{{$frame.Line}}{{end}}
+`))
+
+func newGenericError(err error, c ErrorCode) Error {
+	if le, ok := err.(Error); ok {
+		return le
+	}
+	gerr := &genericError{
+		Timestamp: time.Now(),
+		Err:       err,
+		ECode:     c,
+		Stack:     stacktrace.Capture(1),
+	}
+	if err != nil {
+		gerr.Message = err.Error()
+	}
+	return gerr
+}
+
+func newSystemError(err error) Error {
+	return createSystemError(err, "")
+}
+
+func newSystemErrorWithCausef(err error, cause string, v ...interface{}) Error {
+	return createSystemError(err, fmt.Sprintf(cause, v...))
+}
+
+func newSystemErrorWithCause(err error, cause string) Error {
+	return createSystemError(err, cause)
+}
+
+// createSystemError creates the specified error with the correct number of
+// stack frames skipped. This is only to be called by the other functions for
+// formatting the error.
+func createSystemError(err error, cause string) Error {
+	gerr := &genericError{
+		Timestamp: time.Now(),
+		Err:       err,
+		ECode:     SystemError,
+		Cause:     cause,
+		Stack:     stacktrace.Capture(2),
+	}
+	if err != nil {
+		gerr.Message = err.Error()
+	}
+	return gerr
+}
+
+type genericError struct {
+	Timestamp time.Time
+	ECode     ErrorCode
+	Err       error `json:"-"`
+	Cause     string
+	Message   string
+	Stack     stacktrace.Stacktrace
+}
+
+func (e *genericError) Error() string {
+	if e.Cause == "" {
+		return e.Message
+	}
+	frame := e.Stack.Frames[0]
+	return fmt.Sprintf("%s:%d: %s caused %q", frame.File, frame.Line, e.Cause, e.Message)
+}
+
+func (e *genericError) Code() ErrorCode {
+	return e.ECode
+}
+
+func (e *genericError) Detail(w io.Writer) error {
+	return errorTemplate.Execute(w, e)
+}

vendor/github.com/opencontainers/runc/libcontainer/generic_error_test.go

@@ -0,0 +1,14 @@
+package libcontainer
+
+import (
+	"fmt"
+	"io/ioutil"
+	"testing"
+)
+
+func TestErrorDetail(t *testing.T) {
+	err := newGenericError(fmt.Errorf("test error"), SystemError)
+	if derr := err.Detail(ioutil.Discard); derr != nil {
+		t.Fatal(derr)
+	}
+}

vendor/github.com/opencontainers/runc/libcontainer/init_linux.go

@@ -0,0 +1,370 @@
+// +build linux
+
+package libcontainer
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net"
+	"os"
+	"strconv"
+	"strings"
+	"syscall"
+
+	"github.com/Sirupsen/logrus"
+	"github.com/opencontainers/runc/libcontainer/cgroups"
+	"github.com/opencontainers/runc/libcontainer/configs"
+	"github.com/opencontainers/runc/libcontainer/system"
+	"github.com/opencontainers/runc/libcontainer/user"
+	"github.com/opencontainers/runc/libcontainer/utils"
+	"github.com/vishvananda/netlink"
+)
+
+type initType string
+
+const (
+	initSetns    initType = "setns"
+	initStandard initType = "standard"
+)
+
+type pid struct {
+	Pid int `json:"pid"`
+}
+
+// network is an internal struct used to setup container networks.
+type network struct {
+	configs.Network
+
+	// TempVethPeerName is a unique temporary veth peer name that was placed into
+	// the container's namespace.
+	TempVethPeerName string `json:"temp_veth_peer_name"`
+}
+
+// initConfig is used for transferring parameters from Exec() to Init()
+type initConfig struct {
+	Args             []string         `json:"args"`
+	Env              []string         `json:"env"`
+	Cwd              string           `json:"cwd"`
+	Capabilities     []string         `json:"capabilities"`
+	ProcessLabel     string           `json:"process_label"`
+	AppArmorProfile  string           `json:"apparmor_profile"`
+	NoNewPrivileges  bool             `json:"no_new_privileges"`
+	User             string           `json:"user"`
+	AdditionalGroups []string         `json:"additional_groups"`
+	Config           *configs.Config  `json:"config"`
+	Console          string           `json:"console"`
+	Networks         []*network       `json:"network"`
+	PassedFilesCount int              `json:"passed_files_count"`
+	ContainerId      string           `json:"containerid"`
+	Rlimits          []configs.Rlimit `json:"rlimits"`
+	ExecFifoPath     string           `json:"start_pipe_path"`
+}
+
+type initer interface {
+	Init() error
+}
+
+func newContainerInit(t initType, pipe *os.File, stateDirFD int) (initer, error) {
+	var config *initConfig
+	if err := json.NewDecoder(pipe).Decode(&config); err != nil {
+		return nil, err
+	}
+	if err := populateProcessEnvironment(config.Env); err != nil {
+		return nil, err
+	}
+	switch t {
+	case initSetns:
+		return &linuxSetnsInit{
+			config: config,
+		}, nil
+	case initStandard:
+		return &linuxStandardInit{
+			pipe:       pipe,
+			parentPid:  syscall.Getppid(),
+			config:     config,
+			stateDirFD: stateDirFD,
+		}, nil
+	}
+	return nil, fmt.Errorf("unknown init type %q", t)
+}
+
+// populateProcessEnvironment loads the provided environment variables into the
+// current processes's environment.
+func populateProcessEnvironment(env []string) error {
+	for _, pair := range env {
+		p := strings.SplitN(pair, "=", 2)
+		if len(p) < 2 {
+			return fmt.Errorf("invalid environment '%v'", pair)
+		}
+		if err := os.Setenv(p[0], p[1]); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// finalizeNamespace drops the caps, sets the correct user
+// and working dir, and closes any leaked file descriptors
+// before executing the command inside the namespace
+func finalizeNamespace(config *initConfig) error {
+	// Ensure that all unwanted fds we may have accidentally
+	// inherited are marked close-on-exec so they stay out of the
+	// container
+	if err := utils.CloseExecFrom(config.PassedFilesCount + 3); err != nil {
+		return err
+	}
+
+	capabilities := config.Config.Capabilities
+	if config.Capabilities != nil {
+		capabilities = config.Capabilities
+	}
+	w, err := newCapWhitelist(capabilities)
+	if err != nil {
+		return err
+	}
+	// drop capabilities in bounding set before changing user
+	if err := w.dropBoundingSet(); err != nil {
+		return err
+	}
+	// preserve existing capabilities while we change users
+	if err := system.SetKeepCaps(); err != nil {
+		return err
+	}
+	if err := setupUser(config); err != nil {
+		return err
+	}
+	if err := system.ClearKeepCaps(); err != nil {
+		return err
+	}
+	// drop all other capabilities
+	if err := w.drop(); err != nil {
+		return err
+	}
+	if config.Cwd != "" {
+		if err := syscall.Chdir(config.Cwd); err != nil {
+			return fmt.Errorf("chdir to cwd (%q) set in config.json failed: %v", config.Cwd, err)
+		}
+	}
+	return nil
+}
+
+// syncParentReady sends to the given pipe a JSON payload which indicates that
+// the init is ready to Exec the child process. It then waits for the parent to
+// indicate that it is cleared to Exec.
+func syncParentReady(pipe io.ReadWriter) error {
+	// Tell parent.
+	if err := utils.WriteJSON(pipe, syncT{procReady}); err != nil {
+		return err
+	}
+	// Wait for parent to give the all-clear.
+	var procSync syncT
+	if err := json.NewDecoder(pipe).Decode(&procSync); err != nil {
+		if err == io.EOF {
+			return fmt.Errorf("parent closed synchronisation channel")
+		}
+		if procSync.Type != procRun {
+			return fmt.Errorf("invalid synchronisation flag from parent")
+		}
+	}
+	return nil
+}
+
+// syncParentHooks sends to the given pipe a JSON payload which indicates that
+// the parent should execute pre-start hooks. It then waits for the parent to
+// indicate that it is cleared to resume.
+func syncParentHooks(pipe io.ReadWriter) error {
+	// Tell parent.
+	if err := utils.WriteJSON(pipe, syncT{procHooks}); err != nil {
+		return err
+	}
+	// Wait for parent to give the all-clear.
+	var procSync syncT
+	if err := json.NewDecoder(pipe).Decode(&procSync); err != nil {
+		if err == io.EOF {
+			return fmt.Errorf("parent closed synchronisation channel")
+		}
+		if procSync.Type != procResume {
+			return fmt.Errorf("invalid synchronisation flag from parent")
+		}
+	}
+	return nil
+}
+
+// setupUser changes the groups, gid, and uid for the user inside the container
+func setupUser(config *initConfig) error {
+	// Set up defaults.
+	defaultExecUser := user.ExecUser{
+		Uid:  syscall.Getuid(),
+		Gid:  syscall.Getgid(),
+		Home: "/",
+	}
+	passwdPath, err := user.GetPasswdPath()
+	if err != nil {
+		return err
+	}
+	groupPath, err := user.GetGroupPath()
+	if err != nil {
+		return err
+	}
+	execUser, err := user.GetExecUserPath(config.User, &defaultExecUser, passwdPath, groupPath)
+	if err != nil {
+		return err
+	}
+
+	var addGroups []int
+	if len(config.AdditionalGroups) > 0 {
+		addGroups, err = user.GetAdditionalGroupsPath(config.AdditionalGroups, groupPath)
+		if err != nil {
+			return err
+		}
+	}
+	// before we change to the container's user make sure that the processes STDIO
+	// is correctly owned by the user that we are switching to.
+	if err := fixStdioPermissions(execUser); err != nil {
+		return err
+	}
+	suppGroups := append(execUser.Sgids, addGroups...)
+	if err := syscall.Setgroups(suppGroups); err != nil {
+		return err
+	}
+
+	if err := system.Setgid(execUser.Gid); err != nil {
+		return err
+	}
+	if err := system.Setuid(execUser.Uid); err != nil {
+		return err
+	}
+	// if we didn't get HOME already, set it based on the user's HOME
+	if envHome := os.Getenv("HOME"); envHome == "" {
+		if err := os.Setenv("HOME", execUser.Home); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// fixStdioPermissions fixes the permissions of PID 1's STDIO within the container to the specified user.
+// The ownership needs to match because it is created outside of the container and needs to be
+// localized.
+func fixStdioPermissions(u *user.ExecUser) error {
+	var null syscall.Stat_t
+	if err := syscall.Stat("/dev/null", &null); err != nil {
+		return err
+	}
+	for _, fd := range []uintptr{
+		os.Stdin.Fd(),
+		os.Stderr.Fd(),
+		os.Stdout.Fd(),
+	} {
+		var s syscall.Stat_t
+		if err := syscall.Fstat(int(fd), &s); err != nil {
+			return err
+		}
+		// skip chown of /dev/null if it was used as one of the STDIO fds.
+		if s.Rdev == null.Rdev {
+			continue
+		}
+		if err := syscall.Fchown(int(fd), u.Uid, u.Gid); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// setupNetwork sets up and initializes any network interface inside the container.
+func setupNetwork(config *initConfig) error {
+	for _, config := range config.Networks {
+		strategy, err := getStrategy(config.Type)
+		if err != nil {
+			return err
+		}
+		if err := strategy.initialize(config); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func setupRoute(config *configs.Config) error {
+	for _, config := range config.Routes {
+		_, dst, err := net.ParseCIDR(config.Destination)
+		if err != nil {
+			return err
+		}
+		src := net.ParseIP(config.Source)
+		if src == nil {
+			return fmt.Errorf("Invalid source for route: %s", config.Source)
+		}
+		gw := net.ParseIP(config.Gateway)
+		if gw == nil {
+			return fmt.Errorf("Invalid gateway for route: %s", config.Gateway)
+		}
+		l, err := netlink.LinkByName(config.InterfaceName)
+		if err != nil {
+			return err
+		}
+		route := &netlink.Route{
+			Scope:     netlink.SCOPE_UNIVERSE,
+			Dst:       dst,
+			Src:       src,
+			Gw:        gw,
+			LinkIndex: l.Attrs().Index,
+		}
+		if err := netlink.RouteAdd(route); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func setupRlimits(limits []configs.Rlimit, pid int) error {
+	for _, rlimit := range limits {
+		if err := system.Prlimit(pid, rlimit.Type, syscall.Rlimit{Max: rlimit.Hard, Cur: rlimit.Soft}); err != nil {
+			return fmt.Errorf("error setting rlimit type %v: %v", rlimit.Type, err)
+		}
+	}
+	return nil
+}
+
+func setOomScoreAdj(oomScoreAdj int, pid int) error {
+	path := fmt.Sprintf("/proc/%d/oom_score_adj", pid)
+
+	return ioutil.WriteFile(path, []byte(strconv.Itoa(oomScoreAdj)), 0600)
+}
+
+// signalAllProcesses freezes then iterates over all the processes inside the
+// manager's cgroups sending a SIGKILL to each process then waiting for them to
+// exit.
+func signalAllProcesses(m cgroups.Manager, s os.Signal) error {
+	var procs []*os.Process
+	if err := m.Freeze(configs.Frozen); err != nil {
+		logrus.Warn(err)
+	}
+	pids, err := m.GetAllPids()
+	if err != nil {
+		m.Freeze(configs.Thawed)
+		return err
+	}
+	for _, pid := range pids {
+		p, err := os.FindProcess(pid)
+		if err != nil {
+			logrus.Warn(err)
+			continue
+		}
+		procs = append(procs, p)
+		if err := p.Signal(s); err != nil {
+			logrus.Warn(err)
+		}
+	}
+	if err := m.Freeze(configs.Thawed); err != nil {
+		logrus.Warn(err)
+	}
+	for _, p := range procs {
+		if _, err := p.Wait(); err != nil {
+			logrus.Warn(err)
+		}
+	}
+	return nil
+}

vendor/github.com/opencontainers/runc/libcontainer/integration/checkpoint_test.go

@@ -0,0 +1,204 @@
+package integration
+
+import (
+	"bufio"
+	"bytes"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strings"
+	"syscall"
+	"testing"
+
+	"github.com/opencontainers/runc/libcontainer"
+	"github.com/opencontainers/runc/libcontainer/configs"
+)
+
+func showFile(t *testing.T, fname string) error {
+	t.Logf("=== %s ===\n", fname)
+
+	f, err := os.Open(fname)
+	if err != nil {
+		t.Log(err)
+		return err
+	}
+	defer f.Close()
+
+	scanner := bufio.NewScanner(f)
+	for scanner.Scan() {
+		t.Log(scanner.Text())
+	}
+
+	if err := scanner.Err(); err != nil {
+		return err
+	}
+
+	t.Logf("=== END ===\n")
+
+	return nil
+}
+
+func TestCheckpoint(t *testing.T) {
+	if testing.Short() {
+		return
+	}
+	root, err := newTestRoot()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(root)
+
+	rootfs, err := newRootfs()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer remove(rootfs)
+
+	config := newTemplateConfig(rootfs)
+
+	config.Mounts = append(config.Mounts, &configs.Mount{
+		Destination: "/sys/fs/cgroup",
+		Device:      "cgroup",
+		Flags:       defaultMountFlags | syscall.MS_RDONLY,
+	})
+
+	factory, err := libcontainer.New(root, libcontainer.Cgroupfs)
+
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	container, err := factory.Create("test", config)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer container.Destroy()
+
+	stdinR, stdinW, err := os.Pipe()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	var stdout bytes.Buffer
+
+	pconfig := libcontainer.Process{
+		Cwd:    "/",
+		Args:   []string{"cat"},
+		Env:    standardEnvironment,
+		Stdin:  stdinR,
+		Stdout: &stdout,
+	}
+
+	err = container.Run(&pconfig)
+	stdinR.Close()
+	defer stdinW.Close()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	pid, err := pconfig.Pid()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	process, err := os.FindProcess(pid)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	imagesDir, err := ioutil.TempDir("", "criu")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(imagesDir)
+
+	checkpointOpts := &libcontainer.CriuOpts{
+		ImagesDirectory: imagesDir,
+		WorkDirectory:   imagesDir,
+	}
+	dumpLog := filepath.Join(checkpointOpts.WorkDirectory, "dump.log")
+	restoreLog := filepath.Join(checkpointOpts.WorkDirectory, "restore.log")
+
+	if err := container.Checkpoint(checkpointOpts); err != nil {
+		showFile(t, dumpLog)
+		t.Fatal(err)
+	}
+
+	state, err := container.Status()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if state != libcontainer.Running {
+		t.Fatal("Unexpected state checkpoint: ", state)
+	}
+
+	stdinW.Close()
+	_, err = process.Wait()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// reload the container
+	container, err = factory.Load("test")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	restoreStdinR, restoreStdinW, err := os.Pipe()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	restoreProcessConfig := &libcontainer.Process{
+		Cwd:    "/",
+		Stdin:  restoreStdinR,
+		Stdout: &stdout,
+	}
+
+	err = container.Restore(restoreProcessConfig, checkpointOpts)
+	restoreStdinR.Close()
+	defer restoreStdinW.Close()
+	if err != nil {
+		showFile(t, restoreLog)
+		t.Fatal(err)
+	}
+
+	state, err = container.Status()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if state != libcontainer.Running {
+		t.Fatal("Unexpected restore state: ", state)
+	}
+
+	pid, err = restoreProcessConfig.Pid()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	process, err = os.FindProcess(pid)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	_, err = restoreStdinW.WriteString("Hello!")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	restoreStdinW.Close()
+	s, err := process.Wait()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if !s.Success() {
+		t.Fatal(s.String(), pid)
+	}
+
+	output := string(stdout.Bytes())
+	if !strings.Contains(output, "Hello!") {
+		t.Fatal("Did not restore the pipe correctly:", output)
+	}
+}

vendor/github.com/opencontainers/runc/libcontainer/integration/doc.go

@@ -0,0 +1,2 @@
+// integration is used for integration testing of libcontainer
+package integration

vendor/github.com/opencontainers/runc/libcontainer/integration/init_test.go

@@ -0,0 +1,60 @@
+package integration
+
+import (
+	"os"
+	"runtime"
+	"testing"
+
+	"github.com/Sirupsen/logrus"
+	"github.com/opencontainers/runc/libcontainer"
+	"github.com/opencontainers/runc/libcontainer/cgroups/systemd"
+	_ "github.com/opencontainers/runc/libcontainer/nsenter"
+)
+
+// init runs the libcontainer initialization code because of the busybox style needs
+// to work around the go runtime and the issues with forking
+func init() {
+	if len(os.Args) < 2 || os.Args[1] != "init" {
+		return
+	}
+	runtime.GOMAXPROCS(1)
+	runtime.LockOSThread()
+	factory, err := libcontainer.New("")
+	if err != nil {
+		logrus.Fatalf("unable to initialize for container: %s", err)
+	}
+	if err := factory.StartInitialization(); err != nil {
+		logrus.Fatal(err)
+	}
+}
+
+var (
+	factory        libcontainer.Factory
+	systemdFactory libcontainer.Factory
+)
+
+func TestMain(m *testing.M) {
+	var (
+		err error
+		ret int
+	)
+
+	logrus.SetOutput(os.Stderr)
+	logrus.SetLevel(logrus.InfoLevel)
+
+	factory, err = libcontainer.New("/run/libctTests", libcontainer.Cgroupfs)
+	if err != nil {
+		logrus.Error(err)
+		os.Exit(1)
+	}
+	if systemd.UseSystemd() {
+		systemdFactory, err = libcontainer.New("/run/libctTests", libcontainer.SystemdCgroups)
+		if err != nil {
+			logrus.Error(err)
+			os.Exit(1)
+		}
+	}
+
+	ret = m.Run()
+	os.Exit(ret)
+}