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# Copyright 2015 Hewlett-Packard Development Company, L.P.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from unittest import mock
from oslo_service import fixture as service_fixture
from nova import test
from nova.virt.disk.mount import api
from nova.virt.disk.mount import block
from nova.virt.disk.mount import loop
from nova.virt.disk.mount import nbd
from nova.virt.image import model as imgmodel
PARTITION = 77
ORIG_DEVICE = "/dev/null"
AUTOMAP_PARTITION = "/dev/nullp77"
MAP_PARTITION = "/dev/mapper/nullp77"
class MountTestCase(test.NoDBTestCase):
def setUp(self):
super(MountTestCase, self).setUp()
# Make RetryDecorator not actually sleep on retries
self.useFixture(service_fixture.SleepFixture())
def _test_map_dev(self, partition):
mount = api.Mount(mock.sentinel.image, mock.sentinel.mount_dir)
mount.device = ORIG_DEVICE
mount.partition = partition
mount.map_dev()
return mount
def _exists_effect(self, data):
def exists_effect(filename):
try:
v = data[filename]
if isinstance(v, list):
if len(v) > 0:
return v.pop(0)
self.fail("Out of items for: %s" % filename)
return v
except KeyError:
self.fail("Unexpected call with: %s" % filename)
return exists_effect
def _check_calls(self, exists, filenames, trailing=0):
self.assertEqual([mock.call(x) for x in filenames],
exists.call_args_list[:len(filenames)])
self.assertEqual([mock.call(MAP_PARTITION)] * trailing,
exists.call_args_list[len(filenames):])
@mock.patch('os.path.exists')
def test_map_dev_partition_search(self, exists):
exists.side_effect = self._exists_effect({
ORIG_DEVICE: True})
mount = self._test_map_dev(-1)
self._check_calls(exists, [ORIG_DEVICE])
self.assertNotEqual("", mount.error)
self.assertFalse(mount.mapped)
@mock.patch('os.path.exists')
@mock.patch('nova.privsep.fs.create_device_maps',
return_value=(None, None))
def test_map_dev_good(self, mock_create_maps, mock_exists):
mock_exists.side_effect = self._exists_effect({
ORIG_DEVICE: True,
AUTOMAP_PARTITION: False,
MAP_PARTITION: [False, True]})
mount = self._test_map_dev(PARTITION)
self._check_calls(mock_exists, [ORIG_DEVICE, AUTOMAP_PARTITION], 2)
self.assertEqual("", mount.error)
self.assertTrue(mount.mapped)
@mock.patch('os.path.exists')
@mock.patch('nova.privsep.fs.create_device_maps',
return_value=(None, None))
def test_map_dev_error(self, mock_create_maps, mock_exists):
mock_exists.side_effect = self._exists_effect({
ORIG_DEVICE: True,
AUTOMAP_PARTITION: False,
MAP_PARTITION: False})
mount = self._test_map_dev(PARTITION)
self._check_calls(mock_exists, [ORIG_DEVICE, AUTOMAP_PARTITION],
api.MAX_FILE_CHECKS + 1)
self.assertNotEqual("", mount.error)
self.assertFalse(mount.mapped)
@mock.patch('os.path.exists')
@mock.patch('nova.privsep.fs.create_device_maps',
return_value=(None, None))
def test_map_dev_error_then_pass(self, mock_create_maps, mock_exists):
mock_exists.side_effect = self._exists_effect({
ORIG_DEVICE: True,
AUTOMAP_PARTITION: False,
MAP_PARTITION: [False, False, True]})
mount = self._test_map_dev(PARTITION)
self._check_calls(mock_exists, [ORIG_DEVICE, AUTOMAP_PARTITION], 3)
self.assertEqual("", mount.error)
self.assertTrue(mount.mapped)
@mock.patch('os.path.exists')
def test_map_dev_automap(self, exists):
exists.side_effect = self._exists_effect({
ORIG_DEVICE: True,
AUTOMAP_PARTITION: True})
mount = self._test_map_dev(PARTITION)
self._check_calls(exists,
[ORIG_DEVICE, AUTOMAP_PARTITION, AUTOMAP_PARTITION])
self.assertEqual(AUTOMAP_PARTITION, mount.mapped_device)
self.assertTrue(mount.automapped)
self.assertTrue(mount.mapped)
@mock.patch('os.path.exists')
def test_map_dev_else(self, exists):
exists.side_effect = self._exists_effect({
ORIG_DEVICE: True,
AUTOMAP_PARTITION: True})
mount = self._test_map_dev(None)
self._check_calls(exists, [ORIG_DEVICE])
self.assertEqual(ORIG_DEVICE, mount.mapped_device)
self.assertFalse(mount.automapped)
self.assertTrue(mount.mapped)
def test_instance_for_format_raw(self):
image = imgmodel.LocalFileImage("/some/file.raw",
imgmodel.FORMAT_RAW)
mount_dir = '/mount/dir'
partition = -1
inst = api.Mount.instance_for_format(image, mount_dir, partition)
self.assertIsInstance(inst, loop.LoopMount)
def test_instance_for_format_qcow2(self):
image = imgmodel.LocalFileImage("/some/file.qcows",
imgmodel.FORMAT_QCOW2)
mount_dir = '/mount/dir'
partition = -1
inst = api.Mount.instance_for_format(image, mount_dir, partition)
self.assertIsInstance(inst, nbd.NbdMount)
def test_instance_for_format_block(self):
image = imgmodel.LocalBlockImage(
"/dev/mapper/instances--instance-0000001_disk",)
mount_dir = '/mount/dir'
partition = -1
inst = api.Mount.instance_for_format(image, mount_dir, partition)
self.assertIsInstance(inst, block.BlockMount)
def test_instance_for_device_loop(self):
image = mock.MagicMock()
mount_dir = '/mount/dir'
partition = -1
device = '/dev/loop0'
inst = api.Mount.instance_for_device(image, mount_dir, partition,
device)
self.assertIsInstance(inst, loop.LoopMount)
def test_instance_for_device_loop_partition(self):
image = mock.MagicMock()
mount_dir = '/mount/dir'
partition = 1
device = '/dev/mapper/loop0p1'
inst = api.Mount.instance_for_device(image, mount_dir, partition,
device)
self.assertIsInstance(inst, loop.LoopMount)
def test_instance_for_device_nbd(self):
image = mock.MagicMock()
mount_dir = '/mount/dir'
partition = -1
device = '/dev/nbd0'
inst = api.Mount.instance_for_device(image, mount_dir, partition,
device)
self.assertIsInstance(inst, nbd.NbdMount)
def test_instance_for_device_nbd_partition(self):
image = mock.MagicMock()
mount_dir = '/mount/dir'
partition = 1
device = '/dev/mapper/nbd0p1'
inst = api.Mount.instance_for_device(image, mount_dir, partition,
device)
self.assertIsInstance(inst, nbd.NbdMount)
def test_instance_for_device_block(self):
image = mock.MagicMock()
mount_dir = '/mount/dir'
partition = -1
device = '/dev/mapper/instances--instance-0000001_disk'
inst = api.Mount.instance_for_device(image, mount_dir, partition,
device)
self.assertIsInstance(inst, block.BlockMount)
def test_instance_for_device_block_partiton(self):
image = mock.MagicMock()
mount_dir = '/mount/dir'
partition = 1
device = '/dev/mapper/instances--instance-0000001_diskp1'
inst = api.Mount.instance_for_device(image, mount_dir, partition,
device)
self.assertIsInstance(inst, block.BlockMount)
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