Merge pull request #55 from mapk0y/add_filelocks_option

checkpoint/restore commands support 'file-locks' option.

libcontainer/container_linux.go

@@ -344,6 +344,7 @@ func (c *linuxContainer) Checkpoint(criuOpts *CriuOpts) error {
 		LeaveRunning:   proto.Bool(criuOpts.LeaveRunning),
 		TcpEstablished: proto.Bool(criuOpts.TcpEstablished),
 		ExtUnixSk:      proto.Bool(criuOpts.ExternalUnixConnections),
+		FileLocks:      proto.Bool(criuOpts.FileLocks),
 	}
 
 	// append optional criu opts, e.g., page-server and port
@@ -463,6 +464,7 @@ func (c *linuxContainer) Restore(process *Process, criuOpts *CriuOpts) error {
 			ShellJob:       proto.Bool(criuOpts.ShellJob),
 			ExtUnixSk:      proto.Bool(criuOpts.ExternalUnixConnections),
 			TcpEstablished: proto.Bool(criuOpts.TcpEstablished),
+			FileLocks:      proto.Bool(criuOpts.FileLocks),
 		},
 	}
 	for _, m := range c.config.Mounts {

libcontainer/criu_opts.go

@@ -12,5 +12,6 @@ type CriuOpts struct {
 	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
 }