- commit_snapshot_to_raw_backing:
    only raw
    virt_test_type = qemu
    type = commit_snapshot_to_raw_backing
    kill_vm = yes
    start_vm = no
    force_create_image = no
    # md5sum binary path
    md5sum_bin = "md5sum"
    image_chain = "image1 sn"
    image_format_image1 = "raw"
    image_name_sn = "images/sn"
    # set size to "", so during snapshot creation
    # the cmdline will not have specified size option
    image_size_sn = ""
    image_format_sn = qcow2
    tmp_dir = /var/tmp
    tmp_file_name = ${tmp_dir}/testfile
    dd_bs_val = 1
    dd_bs_count = 1024
    dd_total_size = "${dd_bs_val} * ${dd_bs_count} * 1024 ** 2"
    file_create_cmd = "dd if=/dev/urandom of=%s bs=${dd_bs_val}M count=${dd_bs_count}"
    guest_file_name = ${tmp_file_name}
    snapshot_size_check_after_commit = yes
    Windows:
        guest_file_name = C:\testfile
        x86_64:
            sync_bin = WIN_UTILS:\Sync\sync64.exe /accepteula
        i386, i686:
            sync_bin = WIN_UTILS:\Sync\sync.exe /accepteula
    variants:
        - cache_mode:
            variants:
                - writethrough:
                    cache_mode = writethrough
                - writeback:
                    cache_mode = writeback
                - none:
                    cache_mode = none
                - unsafe:
                    cache_mode = unsafe
                - directsync:
                    cache_mode = directsync
        - compat_level:
            required_qemu = [1.1, )
            variants:
                - compat_0.10:
                    image_extra_params = "compat=0.10"
                - compat_default: