libcontainer: move State in the configs package

We are going to import the namespaces package into libcontainer,
so libcontainer should not be imported into namespaces.

Signed-off-by: Andrey Vagin <avagin@openvz.org>

configs/state.go

@@ -1,4 +1,4 @@
-package libcontainer
+package configs
 
 import (
 	"encoding/json"

container.go

@@ -21,7 +21,7 @@ type Container interface {
 	// errors:
 	// ContainerDestroyed - Container no longer exists,
 	// Systemerror - System error.
-	RunState() (RunState, error)
+	RunState() (configs.RunState, error)
 
 	// Returns the current config of the container.
 	Config() *configs.Config

linux_container.go

@@ -19,7 +19,7 @@ type linuxContainer struct {
 	id            string
 	root          string
 	config        *configs.Config
-	state         *State
+	state         *configs.State
 	cgroupManager CgroupManager
 	initArgs      []string
 }
@@ -32,8 +32,8 @@ func (c *linuxContainer) Config() *configs.Config {
 	return c.config
 }
 
-func (c *linuxContainer) RunState() (RunState, error) {
+func (c *linuxContainer) RunState() (configs.RunState, error) {
-	return Destroyed, nil // FIXME return a real state
+	return configs.Destroyed, nil // FIXME return a real state
 }
 
 func (c *linuxContainer) Processes() ([]int, error) {
@@ -61,18 +61,18 @@ func (c *linuxContainer) Stats() (*ContainerStats, error) {
 	return stats, nil
 }
 
-func (c *linuxContainer) StartProcess(config *ProcessConfig) (int, error) {
+func (c *linuxContainer) StartProcess(pconfig *ProcessConfig) (int, error) {
 	state, err := c.RunState()
 	if err != nil {
 		return -1, err
 	}
 
-	if state != Destroyed {
+	if state != configs.Destroyed {
 		glog.Info("start new container process")
 		panic("not implemented")
 	}
 
-	if err := c.startInitProcess(config); err != nil {
+	if err := c.startInitProcess(pconfig); err != nil {
 		return -1, err
 	}
 
@@ -141,7 +141,7 @@ func (c *linuxContainer) Destroy() error {
 		return err
 	}
 
-	if state != Destroyed {
+	if state != configs.Destroyed {
 		return newGenericError(nil, ContainerNotStopped)
 	}
 

linux_container_test.go

@@ -53,7 +53,7 @@ func TestGetContainerStats(t *testing.T) {
 				},
 			},
 		},
-		state: &State{},
+		state: &configs.State{},
 	}
 
 	stats, err := container.Stats()

linux_factory.go

@@ -93,7 +93,7 @@ func (l *linuxFactory) Create(id string, config *configs.Config) (Container, err
 		root:          containerRoot,
 		config:        config,
 		initArgs:      l.initArgs,
-		state:         &State{},
+		state:         &configs.State{},
 		cgroupManager: cgroupManager,
 	}, nil
 }
@@ -144,7 +144,7 @@ func (l *linuxFactory) loadContainerConfig(root string) (*configs.Config, error)
 	return config, nil
 }
 
-func (l *linuxFactory) loadContainerState(root string) (*State, error) {
+func (l *linuxFactory) loadContainerState(root string) (*configs.State, error) {
 	f, err := os.Open(filepath.Join(root, stateFilename))
 	if err != nil {
 		if os.IsNotExist(err) {
@@ -154,7 +154,7 @@ func (l *linuxFactory) loadContainerState(root string) (*State, error) {
 	}
 	defer f.Close()
 
-	var state *State
+	var state *configs.State
 	if err := json.NewDecoder(f).Decode(&state); err != nil {
 		return nil, newGenericError(err, SystemError)
 	}

linux_factory_test.go

@@ -88,7 +88,7 @@ func TestFactoryLoadContainer(t *testing.T) {
 		expectedConfig = &configs.Config{
 			RootFs: "/mycontainer/root",
 		}
-		expectedState = &State{
+		expectedState = &configs.State{
 			InitPid: 1024,
 		}
 	)

namespaces/exec.go

@@ -9,7 +9,6 @@ import (
 	"os/exec"
 	"syscall"
 
-	"github.com/docker/libcontainer"
 	"github.com/docker/libcontainer/cgroups"
 	"github.com/docker/libcontainer/cgroups/fs"
 	"github.com/docker/libcontainer/cgroups/systemd"
@@ -80,17 +79,17 @@ func Exec(container *configs.Config, stdin io.Reader, stdout, stderr io.Writer,
 		return terminate(err)
 	}
 
-	state := &libcontainer.State{
+	state := &configs.State{
 		InitPid:       command.Process.Pid,
 		InitStartTime: started,
 		NetworkState:  networkState,
 		CgroupPaths:   cgroupPaths,
 	}
 
-	if err := libcontainer.SaveState(dataPath, state); err != nil {
+	if err := configs.SaveState(dataPath, state); err != nil {
 		return terminate(err)
 	}
-	defer libcontainer.DeleteState(dataPath)
+	defer configs.DeleteState(dataPath)
 
 	// wait for the child process to fully complete and receive an error message
 	// if one was encoutered

namespaces/execin.go

@@ -12,7 +12,6 @@ import (
 	"strconv"
 	"syscall"
 
-	"github.com/docker/libcontainer"
 	"github.com/docker/libcontainer/apparmor"
 	"github.com/docker/libcontainer/cgroups"
 	"github.com/docker/libcontainer/configs"
@@ -22,7 +21,7 @@ import (
 
 // ExecIn reexec's the initPath with the argv 0 rewrite to "nsenter" so that it is able to run the
 // setns code in a single threaded environment joining the existing containers' namespaces.
-func ExecIn(container *configs.Config, state *libcontainer.State, userArgs []string, initPath, action string,
+func ExecIn(container *configs.Config, state *configs.State, userArgs []string, initPath, action string,
 	stdin io.Reader, stdout, stderr io.Writer, console string, startCallback func(*exec.Cmd)) (int, error) {
 
 	args := []string{fmt.Sprintf("nsenter-%s", action), "--nspid", strconv.Itoa(state.InitPid)}
@@ -119,6 +118,6 @@ func FinalizeSetns(container *configs.Config, args []string) error {
 	panic("unreachable")
 }
 
-func EnterCgroups(state *libcontainer.State, pid int) error {
+func EnterCgroups(state *configs.State, pid int) error {
 	return cgroups.EnterPid(state.CgroupPaths, pid)
 }

nsinit/exec.go

@@ -111,7 +111,7 @@ func execAction(context *cli.Context) {
 // with the nsenter argument so that the C code can setns an the namespaces that we require.  Then that
 // code path will drop us into the path that we can do the final setup of the namespace and exec the users
 // application.
-func startInExistingContainer(config *configs.Config, state *libcontainer.State, action string, context *cli.Context) (int, error) {
+func startInExistingContainer(config *configs.Config, state *configs.State, action string, context *cli.Context) (int, error) {
 	var (
 		master  *os.File
 		console string