* if it doesn't exist.
*/
private void sameVolRename(Path srcPath,
Path dstPath) throws IOException {
RawLocalFileSystem rfs = (RawLocalFileSystem)this.rfs;
File src = rfs.pathToFile(srcPath);
File dst = rfs.pathToFile(dstPath);
if (!dst.getParentFile().exists()) {
if (!dst.getParentFile().mkdirs()) {
throw new IOException("Unable to rename " + src + " to "
+ dst + ": couldn't create parent directory");