diff --git a/nova/tests/unit/virt/libvirt/test_imagebackend.py b/nova/tests/unit/virt/libvirt/test_imagebackend.py
index ee6f491ba869..dd140ce36896 100644
--- a/nova/tests/unit/virt/libvirt/test_imagebackend.py
+++ b/nova/tests/unit/virt/libvirt/test_imagebackend.py
@@ -153,6 +153,37 @@ class _ImageTestCase(object):
             self.assertEqual(fs.source_type, "file")
             self.assertEqual(fs.source_file, image.path)
 
+    def test_libvirt_info(self):
+        image = self.image_class(self.INSTANCE, self.NAME)
+        extra_specs = {
+            'quota:disk_read_bytes_sec': 10 * units.Mi,
+            'quota:disk_read_iops_sec': 1 * units.Ki,
+            'quota:disk_write_bytes_sec': 20 * units.Mi,
+            'quota:disk_write_iops_sec': 2 * units.Ki,
+            'quota:disk_total_bytes_sec': 30 * units.Mi,
+            'quota:disk_total_iops_sec': 3 * units.Ki,
+        }
+
+        disk = image.libvirt_info(disk_bus="virtio",
+                                  disk_dev="/dev/vda",
+                                  device_type="cdrom",
+                                  cache_mode="none",
+                                  extra_specs=extra_specs,
+                                  hypervisor_version=4004001)
+
+        self.assertIsInstance(disk, vconfig.LibvirtConfigGuestDisk)
+        self.assertEqual("/dev/vda", disk.target_dev)
+        self.assertEqual("virtio", disk.target_bus)
+        self.assertEqual("none", disk.driver_cache)
+        self.assertEqual("cdrom", disk.source_device)
+
+        self.assertEqual(10 * units.Mi, disk.disk_read_bytes_sec)
+        self.assertEqual(1 * units.Ki, disk.disk_read_iops_sec)
+        self.assertEqual(20 * units.Mi, disk.disk_write_bytes_sec)
+        self.assertEqual(2 * units.Ki, disk.disk_write_iops_sec)
+        self.assertEqual(30 * units.Mi, disk.disk_total_bytes_sec)
+        self.assertEqual(3 * units.Ki, disk.disk_total_iops_sec)
+
     @mock.patch('nova.virt.disk.api.get_disk_size')
     def test_get_disk_size(self, get_disk_size):
         get_disk_size.return_value = 2361393152
@@ -1336,6 +1367,16 @@ class RbdTestCase(_ImageTestCase, test.NoDBTestCase):
                               self.TEMPLATE_PATH, 1)
             driver_mock.size.assert_called_once_with(image.rbd_name)
 
+    @mock.patch.object(rbd_utils.RBDDriver, "get_mon_addrs")
+    def test_libvirt_info(self, mock_mon_addrs):
+        def get_mon_addrs():
+            hosts = ["server1", "server2"]
+            ports = ["1899", "1920"]
+            return hosts, ports
+        mock_mon_addrs.side_effect = get_mon_addrs
+
+        super(RbdTestCase, self).test_libvirt_info()
+
     @mock.patch.object(rbd_utils.RBDDriver, "get_mon_addrs")
     def test_get_model(self, mock_mon_addrs):
         pool = "FakePool"
diff --git a/nova/virt/libvirt/imagebackend.py b/nova/virt/libvirt/imagebackend.py
index 4550d5ffae8b..e4be13faf075 100644
--- a/nova/virt/libvirt/imagebackend.py
+++ b/nova/virt/libvirt/imagebackend.py
@@ -165,6 +165,11 @@ class Image(object):
         info.driver_name = driver_name
         info.source_path = self.path
 
+        self.disk_qos(info, extra_specs)
+
+        return info
+
+    def disk_qos(self, info, extra_specs):
         tune_items = ['disk_read_bytes_sec', 'disk_read_iops_sec',
             'disk_write_bytes_sec', 'disk_write_iops_sec',
             'disk_total_bytes_sec', 'disk_total_iops_sec']
@@ -173,7 +178,6 @@ class Image(object):
             if len(scope) > 1 and scope[0] == 'quota':
                 if scope[1] in tune_items:
                     setattr(info, scope[1], value)
-        return info
 
     def libvirt_fs_info(self, target, driver_type=None):
         """Get `LibvirtConfigGuestFilesys` filled for this image.
@@ -729,6 +733,9 @@ class Rbd(Image):
         if auth_enabled:
             info.auth_secret_type = 'ceph'
             info.auth_secret_uuid = CONF.libvirt.rbd_secret_uuid
+
+        self.disk_qos(info, extra_specs)
+
         return info
 
     def _can_fallocate(self):