RuntimeCkpt is now State and the checkpoint file is called state.json.

Docker-DCO-1.1-Signed-off-by: Vishnu Kannan <vishnuk@google.com> (github: vishh)

state.go

@@ -4,6 +4,8 @@ import (
 	"encoding/json"
 	"os"
 	"path/filepath"
+
+	"github.com/docker/libcontainer/network"
 )
 
 // State represents a running container's state
@@ -12,12 +14,17 @@ type State struct {
 	InitPid int `json:"init_pid,omitempty"`
 	// InitStartTime is the init process start time
 	InitStartTime string `json:"init_start_time,omitempty"`
+	// Network runtime state.
+	NetworkState network.NetworkState `json:"network_state,omitempty"`
 }
 
+// The name of the runtime state file
+const stateFile = "state.json"
+
 // SaveState writes the container's runtime state to a state.json file
 // in the specified path
 func SaveState(basePath string, state *State) error {
-	f, err := os.Create(filepath.Join(basePath, "state.json"))
+	f, err := os.Create(filepath.Join(basePath, stateFile))
 	if err != nil {
 		return err
 	}
@@ -28,7 +35,7 @@ func SaveState(basePath string, state *State) error {
 
 // GetState reads the state.json file for a running container
 func GetState(basePath string) (*State, error) {
-	f, err := os.Open(filepath.Join(basePath, "state.json"))
+	f, err := os.Open(filepath.Join(basePath, stateFile))
 	if err != nil {
 		return nil, err
 	}
@@ -44,5 +51,5 @@ func GetState(basePath string) (*State, error) {
 
 // DeleteState deletes the state.json file
 func DeleteState(basePath string) error {
-	return os.Remove(filepath.Join(basePath, "state.json"))
+	return os.Remove(filepath.Join(basePath, stateFile))
 }