@@ -31,14 +31,13 @@ func init() {

 // Init returns a new BTRFS driver.

 // An error is returned if BTRFS is not supported.

 func Init(home string, options []string, uidMaps, gidMaps []idtools.IDMap) (graphdriver.Driver, error) {

-	rootdir := path.Dir(home)

-	var buf syscall.Statfs_t

-	if err := syscall.Statfs(rootdir, &buf); err != nil {

+	fsMagic, err := graphdriver.GetFSMagic(home)

+	if err != nil {

 		return nil, err

 	}

-	if graphdriver.FsMagic(buf.Type) != graphdriver.FsMagicBtrfs {

+	if fsMagic != graphdriver.FsMagicBtrfs {

 		return nil, graphdriver.ErrPrerequisites

 	}