diff --git a/nova/tests/unit/virt/libvirt/fake_imagebackend.py b/nova/tests/unit/virt/libvirt/fake_imagebackend.py
index 2091aafadafb..a8061b400f2c 100644
--- a/nova/tests/unit/virt/libvirt/fake_imagebackend.py
+++ b/nova/tests/unit/virt/libvirt/fake_imagebackend.py
@@ -196,16 +196,15 @@ class ImageBackendFixture(fixtures.Fixture):
         if self.imported_files is not None:
             self.imported_files.append((local_filename, remote_filename))
 
-    def _fake_libvirt_info(self, mock_disk, disk_bus, disk_dev, device_type,
-                           cache_mode, extra_specs, hypervisor_version,
-                           disk_unit=None):
+    def _fake_libvirt_info(self, mock_disk, disk_info, cache_mode,
+                           extra_specs, hypervisor_version, disk_unit=None):
         # For tests in test_virt_drivers which expect libvirt_info to be
         # functional
         info = config.LibvirtConfigGuestDisk()
         info.source_type = 'file'
-        info.source_device = device_type
-        info.target_bus = disk_bus
-        info.target_dev = disk_dev
+        info.source_device = disk_info['type']
+        info.target_bus = disk_info['bus']
+        info.target_dev = disk_info['dev']
         info.driver_cache = cache_mode
         info.driver_format = 'raw'
         info.source_path = mock_disk.path
diff --git a/nova/tests/unit/virt/libvirt/test_imagebackend.py b/nova/tests/unit/virt/libvirt/test_imagebackend.py
index 7e21b06d284c..89223357f81b 100644
--- a/nova/tests/unit/virt/libvirt/test_imagebackend.py
+++ b/nova/tests/unit/virt/libvirt/test_imagebackend.py
@@ -171,10 +171,13 @@ class _ImageTestCase(object):
             'quota:disk_total_bytes_sec': 30 * units.Mi,
             'quota:disk_total_iops_sec': 3 * units.Ki,
         }
+        disk_info = {
+            'bus': 'virtio',
+            'dev': '/dev/vda',
+            'type': 'cdrom',
+        }
 
-        disk = image.libvirt_info(disk_bus="virtio",
-                                  disk_dev="/dev/vda",
-                                  device_type="cdrom",
+        disk = image.libvirt_info(disk_info,
                                   cache_mode="none",
                                   extra_specs=extra_specs,
                                   hypervisor_version=4004001,
diff --git a/nova/virt/libvirt/driver.py b/nova/virt/libvirt/driver.py
index 6e60f3fe2351..3a7ca144ed12 100644
--- a/nova/virt/libvirt/driver.py
+++ b/nova/virt/libvirt/driver.py
@@ -3892,10 +3892,7 @@ class LibvirtDriver(driver.ComputeDriver):
         if 'unit' in disk_mapping and disk_info['bus'] == 'scsi':
             disk_unit = disk_mapping['unit']
             disk_mapping['unit'] += 1  # Increments for the next disk added
-        conf = disk.libvirt_info(disk_info['bus'],
-                                 disk_info['dev'],
-                                 disk_info['type'],
-                                 self.disk_cachemode,
+        conf = disk.libvirt_info(disk_info, self.disk_cachemode,
                                  inst_type['extra_specs'],
                                  self._host.get_version(),
                                  disk_unit=disk_unit)
diff --git a/nova/virt/libvirt/imagebackend.py b/nova/virt/libvirt/imagebackend.py
index fcdedac74de9..5b4f72354e7a 100644
--- a/nova/virt/libvirt/imagebackend.py
+++ b/nova/virt/libvirt/imagebackend.py
@@ -119,24 +119,23 @@ class Image(object):
         """
         pass
 
-    def libvirt_info(self, disk_bus, disk_dev, device_type, cache_mode,
+    def libvirt_info(self, disk_info, cache_mode,
                      extra_specs, hypervisor_version, boot_order=None,
                      disk_unit=None):
         """Get `LibvirtConfigGuestDisk` filled for this image.
 
-        :disk_dev: Disk bus device name
-        :disk_bus: Disk bus type
-        :device_type: Device type for this image.
+        :disk_info: Metadata generated by libvirt.blockinfo.get_disk_mapping
         :cache_mode: Caching mode for this image
         :extra_specs: Instance type extra specs dict.
         :hypervisor_version: the hypervisor version
         :boot_order: Disk device boot order
         """
+        disk_bus = disk_info['bus']
         info = vconfig.LibvirtConfigGuestDisk()
         info.source_type = self.source_type
-        info.source_device = device_type
+        info.source_device = disk_info['type']
         info.target_bus = disk_bus
-        info.target_dev = disk_dev
+        info.target_dev = disk_info['dev']
         info.driver_cache = cache_mode
         info.driver_discard = self.discard_mode
         info.driver_io = self.driver_io
@@ -825,28 +824,27 @@ class Rbd(Image):
 
         self.discard_mode = CONF.libvirt.hw_disk_discard
 
-    def libvirt_info(self, disk_bus, disk_dev, device_type, cache_mode,
+    def libvirt_info(self, disk_info, cache_mode,
                      extra_specs, hypervisor_version, boot_order=None,
                      disk_unit=None):
         """Get `LibvirtConfigGuestDisk` filled for this image.
 
-        :disk_dev: Disk bus device name
-        :disk_bus: Disk bus type
-        :device_type: Device type for this image.
+        :disk_info: Metadata generated by libvirt.blockinfo.get_disk_mapping
         :cache_mode: Caching mode for this image
         :extra_specs: Instance type extra specs dict.
         :hypervisor_version: the hypervisor version
         :boot_order: Disk device boot order
         """
         info = vconfig.LibvirtConfigGuestDisk()
+        disk_bus = disk_info['bus']
 
         hosts, ports = self.driver.get_mon_addrs()
-        info.source_device = device_type
+        info.source_device = disk_info['type']
         info.driver_format = 'raw'
         info.driver_cache = cache_mode
         info.driver_discard = self.discard_mode
         info.target_bus = disk_bus
-        info.target_dev = disk_dev
+        info.target_dev = disk_info['dev']
         info.source_type = 'network'
         info.source_protocol = 'rbd'
         info.source_name = '%s/%s' % (self.pool, self.rbd_name)