Method seek_hole

block/src/qcow/mod.rs:2153–2168

(&mut self, offset: u64)

impl SeekHole for QcowFile {
    fn seek_hole(&mut self, offset: u64) -> io::Result<Option<u64>> {
        match self.find_allocated_cluster(offset, false) {
            Err(e) => Err(e),
            Ok(None) => {
                if offset < self.virtual_size() {
                    Ok(Some(self.seek(SeekFrom::End(0))?))
                } else {
                    Ok(None)
                }
            }
            Ok(Some(o)) => {
                self.seek(SeekFrom::Start(o))?;
                Ok(Some(o))
            }
        }
    }

    fn seek_data(&mut self, offset: u64) -> io::Result<Option<u64>> {
        match self.find_allocated_cluster(offset, true) {