Function qcow_tempfile

performance-metrics/src/util.rs:55–66

Create a QCOW2 image with `num_clusters` allocated clusters opened via QcowDisk with synchronous backend.

(num_clusters: usize)

/// Create a QCOW2 image with `num_clusters` allocated clusters opened
/// via QcowDisk with synchronous backend.
pub fn qcow_tempfile(num_clusters: usize) -> (TempFile, QcowDisk) {
    let tmp = create_qcow_tempfile(num_clusters);
    let disk = QcowDisk::new(
        tmp.as_file().try_clone().unwrap(),
        false,
        false,
        true,
        false,
    )
    .expect("failed to open QCOW2 via QcowDisk");
    (tmp, disk)
}

/// Create a QCOW2 image with `num_clusters` allocated clusters opened
/// via QcowDisk with io_uring backend.