[gnome-boxes/create-qcow2-with-compat1.1] vm-configurator: Create qcow2 with compat 1.1

[Felipe Borges <felipeborges src gnome org>]

commit 4ddc03256837f8d397898a4516b1ef0056ad5aad
Author: Felipe Borges <felipeborges gnome org>
Date:   Tue Oct 9 14:36:33 2018 +0200

    vm-configurator: Create qcow2 with compat 1.1
    
    This change enables more efficient copy-on-read for sparse
    images.
    
    The "compat" property of a StorageVolTarget specifies the
    compatibility level[0], therefore defining which qcow2 version
    to use while creating new images.
    
    Setting "compat" to 1.1 makes us require QEMU 1.1 or newer,
    which is a very old version already. Most of popular distros
    are shipping more recent versions.
    
    [0] https://libvirt.org/formatstorage.html#StorageVolTarget
    
    Fixes #44

 src/vm-configurator.vala | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/vm-configurator.vala b/src/vm-configurator.vala
index dcff9d5e..498739ca 100644
--- a/src/vm-configurator.vala
+++ b/src/vm-configurator.vala
@@ -164,6 +164,7 @@ public static StorageVol create_volume_config (string name, int64 storage) throw
         volume.set_capacity (storage);
         var target = new StorageVolTarget ();
         target.set_format ("qcow2");
+        target.set_compat ("1.1");
         var permissions = get_default_permissions ();
         target.set_permissions (permissions);
         volume.set_target (target);