Function open_qcow2

block/src/factory.rs:171–204

(
    file: fs::File,
    options: &DiskOpenOptions<'_>,
)

}

fn open_qcow2(
    file: fs::File,
    options: &DiskOpenOptions<'_>,
) -> BlockResult<Box<dyn AsyncFullDiskFile>> {
    #[cfg(feature = "io_uring")]
    if !options.disable_io_uring {
        if io_uring_supported() {
            info!("Opening QCOW2 disk file with io_uring backend");
            return Ok(Box::new(
                QcowDisk::new(
                    file,
                    options.direct,
                    options.backing_files,
                    options.sparse,
                    true,
                )
                .map_err(|e| e.with_path(options.path))?,
            ));
        }
        info!("io_uring runtime probe failed for QCOW2, using synchronous backend");
    }

    info!("Opening QCOW2 disk file with synchronous backend");
    Ok(Box::new(
        QcowDisk::new(
            file,
            options.direct,
            options.backing_files,
            options.sparse,
            false,
        )
        .map_err(|e| e.with_path(options.path))?,
    ))
}

#[cfg(test)]
mod unit_tests {