libvirt: Reduce calls to qemu-img during update_available_resource
I464bc2b88123a012cd12213beac4b572c3c20a56 introduced a second call to ``qemu-img`` that can easily be collapsed into one with the addition of a new call within the disk_api. Related-Bug: #1785827 Change-Id: Ibfd0527ed79f60282b542034d7cb97b424becba3
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@ -4642,7 +4642,8 @@ class LibvirtConnTestCase(test.NoDBTestCase,
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[mock.call(host='127.0.0.1', port=10000),
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mock.call(host='127.0.0.1', port=10001)])
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@mock.patch('nova.virt.disk.api.get_disk_size', return_value=0)
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@mock.patch('nova.virt.disk.api.get_disk_info',
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return_value=mock.Mock(disk_size=0))
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@mock.patch('nova.virt.libvirt.storage.lvm.get_volume_size',
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return_value='fake-size')
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def test_detach_encrypted_volumes(self, mock_get_volume_size,
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@ -9421,12 +9422,9 @@ class LibvirtConnTestCase(test.NoDBTestCase,
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return mock_virDomain
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mock_lookup.side_effect = mock_lookup_side_effect
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mock_getsize = mock.Mock()
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mock_getsize.return_value = "10737418240"
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mock_get_virtual_size = mock.Mock()
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mock_get_virtual_size.return_value = "10737418240"
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return (mock_getsize, mock_get_virtual_size, mock_lookup)
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mock_qemu_img_info = mock.Mock(disk_size=10737418240,
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virtual_size=10737418240)
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return (mock_qemu_img_info, mock_lookup)
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def test_is_shared_block_storage_rbd(self):
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self.flags(images_type='rbd', group='libvirt')
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@ -9519,7 +9517,7 @@ class LibvirtConnTestCase(test.NoDBTestCase,
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{'connection_info': 'info', 'mount_device': '/dev/vda'}]}
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instance = objects.Instance(**self.test_instance)
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drvr = libvirt_driver.LibvirtDriver(fake.FakeVirtAPI(), False)
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(mock_getsize, mock_get_virtual_size, mock_lookup) =\
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(mock_qemu_img_info, mock_lookup) =\
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self._is_shared_block_storage_test_create_mocks(disks)
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data = objects.LibvirtLiveMigrateData(is_volume_backed=True,
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is_shared_instance_path=False)
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@ -9543,21 +9541,18 @@ class LibvirtConnTestCase(test.NoDBTestCase,
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{'connection_info': 'info', 'mount_device': '/dev/vda'}]}
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instance = objects.Instance(**self.test_instance)
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drvr = libvirt_driver.LibvirtDriver(fake.FakeVirtAPI(), False)
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(mock_getsize, mock_get_virtual_size, mock_lookup) =\
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(mock_qemu_img_info, mock_lookup) =\
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self._is_shared_block_storage_test_create_mocks(disks)
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data = objects.LibvirtLiveMigrateData(is_volume_backed=True,
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is_shared_instance_path=False)
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with test.nested(
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mock.patch.object(libvirt_driver.disk_api,
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'get_allocated_disk_size', mock_getsize),
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mock.patch.object(libvirt_driver.disk_api,
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'get_disk_size', mock_get_virtual_size),
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'get_disk_info', mock_qemu_img_info),
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mock.patch.object(host.Host, '_get_domain', mock_lookup)):
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self.assertFalse(drvr._is_shared_block_storage(
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instance, data,
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block_device_info = bdi))
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mock_getsize.assert_called_once_with('/instance/disk.local')
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mock_get_virtual_size.assert_called_once_with('/instance/disk.local')
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mock_qemu_img_info.assert_called_once_with('/instance/disk.local')
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mock_lookup.assert_called_once_with(instance)
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def test_is_shared_block_storage_nfs(self):
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@ -12370,12 +12365,8 @@ class LibvirtConnTestCase(test.NoDBTestCase,
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migrate_data=migrate_data)
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self.assertEqual(['cmt'], res.supported_perf_events)
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@mock.patch('nova.virt.disk.api.get_disk_size',
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side_effect=[10737418240, 21474836480])
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@mock.patch('nova.virt.disk.api.get_allocated_disk_size',
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side_effect=[10737418240, 3328599655])
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def test_get_instance_disk_info_works_correctly(self, mock_get_alloc,
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mock_get_disk_size):
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@mock.patch('nova.virt.disk.api.get_disk_info')
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def test_get_instance_disk_info_works_correctly(self, mock_qemu_img_info):
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# Test data
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instance = objects.Instance(**self.test_instance)
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dummyxml = ("<domain type='kvm'><name>instance-0000000a</name>"
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@ -12392,6 +12383,11 @@ class LibvirtConnTestCase(test.NoDBTestCase,
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vdmock = mock.Mock(autospec=fakelibvirt.virDomain)
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vdmock.XMLDesc.return_value = dummyxml
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mock_qemu_img_info.side_effect = [
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mock.Mock(disk_size=10737418240, virtual_size=10737418240),
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mock.Mock(disk_size=3328599655, virtual_size=21474836480)
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]
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def fake_lookup(_uuid):
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if _uuid == instance.uuid:
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return vdmock
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@ -12416,12 +12412,9 @@ class LibvirtConnTestCase(test.NoDBTestCase,
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self.assertEqual(info[1]['over_committed_disk_size'], 18146236825)
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vdmock.XMLDesc.assert_called_once_with(0)
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mock_get_alloc.assert_has_calls([mock.call('/test/disk'),
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mock.call('/test/disk.local')])
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self.assertEqual(2, mock_get_alloc.call_count)
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mock_get_disk_size.assert_has_calls([mock.call('/test/disk'),
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mock_qemu_img_info.assert_has_calls([mock.call('/test/disk'),
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mock.call('/test/disk.local')])
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self.assertEqual(2, mock_get_disk_size.call_count)
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self.assertEqual(2, mock_qemu_img_info.call_count)
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def test_post_live_migration(self):
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vol = {'block_device_mapping': [
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@ -12508,12 +12501,9 @@ class LibvirtConnTestCase(test.NoDBTestCase,
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instance)
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_test()
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@mock.patch('nova.virt.disk.api.get_disk_size',
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side_effect=[10737418240, 21474836480])
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@mock.patch('nova.virt.disk.api.get_allocated_disk_size',
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side_effect=[10737418240, 3328599655])
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@mock.patch('nova.virt.disk.api.get_disk_info')
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def test_get_instance_disk_info_excludes_volumes(
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self, mock_get_alloc, mock_get_disk_size):
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self, mock_qemu_img_info):
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# Test data
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instance = objects.Instance(**self.test_instance)
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dummyxml = ("<domain type='kvm'><name>instance-0000000a</name>"
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@ -12536,6 +12526,11 @@ class LibvirtConnTestCase(test.NoDBTestCase,
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vdmock = mock.Mock(autospec=fakelibvirt.virDomain)
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vdmock.XMLDesc.return_value = dummyxml
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mock_qemu_img_info.side_effect = [
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mock.Mock(disk_size=10737418240, virtual_size=10737418240),
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mock.Mock(disk_size=3328599655, virtual_size=21474836480)
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]
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def fake_lookup(_uuid):
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if _uuid == instance.uuid:
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return vdmock
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@ -12565,19 +12560,12 @@ class LibvirtConnTestCase(test.NoDBTestCase,
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self.assertEqual(info[1]['over_committed_disk_size'], 18146236825)
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vdmock.XMLDesc.assert_called_once_with(0)
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mock_get_alloc.assert_has_calls([mock.call('/test/disk'),
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mock.call('/test/disk.local')])
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self.assertEqual(2, mock_get_alloc.call_count)
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mock_get_disk_size.assert_has_calls([mock.call('/test/disk'),
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mock_qemu_img_info.assert_has_calls([mock.call('/test/disk'),
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mock.call('/test/disk.local')])
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self.assertEqual(2, mock_get_disk_size.call_count)
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self.assertEqual(2, mock_qemu_img_info.call_count)
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@mock.patch('nova.virt.disk.api.get_disk_size',
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return_value=10737418240)
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@mock.patch('nova.virt.disk.api.get_allocated_disk_size',
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return_value=10737418240)
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def test_get_instance_disk_info_no_bdinfo_passed(
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self, mock_get_alloc, mock_get_disk_size):
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@mock.patch('nova.virt.disk.api.get_disk_info')
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def test_get_instance_disk_info_no_bdinfo_passed(self, mock_qemu_img_info):
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# NOTE(ndipanov): _get_disk_overcomitted_size_total calls this method
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# without access to Nova's block device information. We want to make
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# sure that we guess volumes mostly correctly in that case as well
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@ -12598,6 +12586,9 @@ class LibvirtConnTestCase(test.NoDBTestCase,
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vdmock = mock.Mock(autospec=fakelibvirt.virDomain)
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vdmock.XMLDesc.return_value = dummyxml
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mock_qemu_img_info.return_value = mock.Mock(disk_size=10737418240,
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virtual_size=10737418240)
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def fake_lookup(_uuid):
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if _uuid == instance.uuid:
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return vdmock
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@ -12616,8 +12607,7 @@ class LibvirtConnTestCase(test.NoDBTestCase,
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self.assertEqual(info[0]['over_committed_disk_size'], 0)
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vdmock.XMLDesc.assert_called_once_with(0)
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mock_get_alloc.assert_called_once_with(path)
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mock_get_disk_size.assert_called_once_with(path)
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mock_qemu_img_info.assert_called_once_with(path)
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def test_spawn_with_network_info(self):
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def fake_getLibVersion():
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@ -89,6 +89,15 @@ def resize2fs(image, check_exit_code=False, run_as_root=False):
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nova.privsep.fs.unprivileged_resize2fs(image, check_exit_code)
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def get_disk_info(path):
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"""Get QEMU info of a disk image
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:param path: Path to the disk image
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:returns: oslo_utils.imageutils.QemuImgInfo object for the image.
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"""
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return images.qemu_img_info(path)
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def get_disk_size(path):
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"""Get the (virtual) size of a disk image
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@ -8057,6 +8057,7 @@ class LibvirtDriver(driver.ComputeDriver):
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# get the real disk size or
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# raise a localized error if image is unavailable
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if disk_type == 'file':
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qemu_img_info = disk_api.get_disk_info(path)
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if driver_type == 'ploop':
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dk_size = 0
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for dirpath, dirnames, filenames in os.walk(path):
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@ -8064,10 +8065,10 @@ class LibvirtDriver(driver.ComputeDriver):
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fp = os.path.join(dirpath, f)
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dk_size += os.path.getsize(fp)
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else:
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dk_size = disk_api.get_allocated_disk_size(path)
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dk_size = qemu_img_info.disk_size
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# NOTE(lyarwood): Fetch the virtual size for all file disks.
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virt_size = disk_api.get_disk_size(path)
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virt_size = qemu_img_info.virtual_size
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elif disk_type == 'block' and block_device_info:
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# FIXME(lyarwood): There's no reason to use a separate call
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