422 pub struct QcowFile {  struct
423     inner: Mutex<QcowFileInner>,  argument
444 impl DiskFile for QcowFile {}  argument
446 impl DiskFlush for QcowFile {  implementation
454 impl QcowFile {  impl
456     pub fn from(mut file: File, params: DiskFileParams) -> Result<QcowFile> {  in from()
624     pub fn new(file: File, params: DiskFileParams, virtual_size: u64) -> Result<QcowFile> {  in new()
634     ) -> Result<QcowFile> {  in new_from_backing()
661     ) -> Result<QcowFile> {  in new_from_header()
1459 impl Drop for QcowFile {  implementation
1465 impl AsRawDescriptors for QcowFile {  implementation
1478 impl Read for QcowFile {  implementation
1502 impl Seek for QcowFile {  implementation
1535 impl Write for QcowFile {  implementation
1555 impl FileReadWriteAtVolatile for QcowFile {  implementation
1579 impl FileSync for QcowFile {  implementation
1594 impl FileSetLen for QcowFile {  implementation
1603 impl DiskGetLen for QcowFile {  implementation
1609 impl FileAllocate for QcowFile {  implementation
1623 impl PunchHole for QcowFile {  implementation
1638 impl WriteZeroesAt for QcowFile {  implementation
1645 impl ToAsyncDisk for QcowFile {  implementation
1748         F: FnMut(QcowFile),  in with_default_file()
1757     fn write_all_at(qcow: &mut QcowFile, data: &[u8], offset: u64) -> std::io::Result<()> {  in write_all_at()
1764     fn read_exact_at(qcow: &mut QcowFile, data: &mut [u8], offset: u64) -> std::io::Result<()> {  in read_exact_at()