0f12870803
Reference objects, not their IDs - this way when object is modified, it is visible everywhere where it is used. Main changes: - volume.pool - Pool object - volume.source - Volume object Since volume have Pool object reference now, move volume related functions into Volume class (from Pool class). This avoids horrible `storage.get_pool(volume).something(volume)` construct. One issue here is since volume.source reference a Volume object from a different VM - VM's template, now VM load order is important. Since we don't have control over it, initialize vm.storage when needed - possibly while initializing storage of different VM. Since we don't have cycles in AppVM-TemplateVM dependencies, it is safe. Also, since this commit, volume.source (if defined) always points at volume of the same name from VM's template. Using volumes with something else as a source is no longer supported. QubesOS/qubes-issues#2256
196 lines
7.3 KiB
Python
196 lines
7.3 KiB
Python
#
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# The Qubes OS Project, http://www.qubes-os.org
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#
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# Copyright (C) 2016 Bahtiar `kalkin-` Gadimov <bahtiar@gadimov.de>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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#
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''' Tests for lvm storage driver. By default tests are going to use the
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'qubes_dom0/pool00'. An alternative LVM thin pool may be provided via
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:envvar:`DEFAULT_LVM_POOL` shell variable.
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Any pool variables prefixed with 'LVM_' or 'lvm_' represent a LVM
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'volume_group/thin_pool' combination. Pool variables without a prefix
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represent a :py:class:`qubes.storage.lvm.ThinPool`.
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'''
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import os
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import unittest
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import qubes.tests
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from qubes.storage.lvm import ThinPool, ThinVolume
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if 'DEFAULT_LVM_POOL' in os.environ.keys():
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DEFAULT_LVM_POOL = os.environ['DEFAULT_LVM_POOL']
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else:
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DEFAULT_LVM_POOL = 'qubes_dom0/pool00'
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def lvm_pool_exists(volume_group, thin_pool):
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''' Returns ``True`` if thin pool exists in the volume group. '''
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path = "/dev/mapper/{!s}-{!s}".format(volume_group, thin_pool)
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return os.path.exists(path)
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def skipUnlessLvmPoolExists(test_item): # pylint: disable=invalid-name
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''' Decorator that skips LVM tests if the default pool is missing. '''
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volume_group, thin_pool = DEFAULT_LVM_POOL.split('/', 1)
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result = lvm_pool_exists(volume_group, thin_pool)
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msg = 'LVM thin pool {!r} does not exist'.format(DEFAULT_LVM_POOL)
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return unittest.skipUnless(result, msg)(test_item)
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POOL_CONF = {'name': 'test-lvm',
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'driver': 'lvm_thin',
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'volume_group': DEFAULT_LVM_POOL.split('/')[0],
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'thin_pool': DEFAULT_LVM_POOL.split('/')[1]}
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class ThinPoolBase(qubes.tests.QubesTestCase):
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''' Sanity tests for :py:class:`qubes.storage.lvm.ThinPool` '''
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created_pool = False
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def setUp(self):
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super(ThinPoolBase, self).setUp()
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volume_group, thin_pool = DEFAULT_LVM_POOL.split('/', 1)
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self.pool = self._find_pool(volume_group, thin_pool)
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if not self.pool:
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self.pool = self.app.add_pool(**POOL_CONF)
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self.created_pool = True
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def tearDown(self):
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''' Remove the default lvm pool if it was created only for this test '''
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if self.created_pool:
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self.app.remove_pool(self.pool.name)
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super(ThinPoolBase, self).tearDown()
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def _find_pool(self, volume_group, thin_pool):
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''' Returns the pool matching the specified ``volume_group`` &
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``thin_pool``, or None.
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'''
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pools = [p for p in self.app.pools
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if issubclass(p.__class__, ThinPool)]
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for pool in pools:
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if pool.volume_group == volume_group \
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and pool.thin_pool == thin_pool:
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return pool
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return None
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@skipUnlessLvmPoolExists
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class TC_00_ThinPool(ThinPoolBase):
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''' Sanity tests for :py:class:`qubes.storage.lvm.ThinPool` '''
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def setUp(self):
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xml_path = '/tmp/qubes-test.xml'
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self.app = qubes.Qubes.create_empty_store(store=xml_path,
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clockvm=None,
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updatevm=None,
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offline_mode=True,
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)
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os.environ['QUBES_XML_PATH'] = xml_path
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super(TC_00_ThinPool, self).setUp()
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def tearDown(self):
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super(TC_00_ThinPool, self).tearDown()
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os.unlink(self.app.store)
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del self.app
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for attr in dir(self):
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if isinstance(getattr(self, attr), qubes.vm.BaseVM):
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delattr(self, attr)
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def test_000_default_thin_pool(self):
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''' Check whether :py:data`DEFAULT_LVM_POOL` exists. This pool is
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created by default, if at installation time LVM + Thin was chosen.
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'''
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msg = 'Thin pool {!r} does not exist'.format(DEFAULT_LVM_POOL)
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self.assertTrue(self.pool, msg)
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def test_001_origin_volume(self):
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''' Test origin volume creation '''
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config = {
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'name': 'root',
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'pool': self.pool.name,
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'save_on_stop': True,
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'rw': True,
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'size': qubes.config.defaults['root_img_size'],
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}
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vm = qubes.tests.storage.TestVM(self)
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volume = self.app.get_pool(self.pool.name).init_volume(vm, config)
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self.assertIsInstance(volume, ThinVolume)
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self.assertEqual(volume.name, 'root')
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self.assertEqual(volume.pool, self.pool.name)
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self.assertEqual(volume.size, qubes.config.defaults['root_img_size'])
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volume.create()
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path = "/dev/%s" % volume.vid
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self.assertTrue(os.path.exists(path))
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self.pool.remove(volume)
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def test_003_read_write_volume(self):
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''' Test read-write volume creation '''
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config = {
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'name': 'root',
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'pool': self.pool.name,
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'rw': True,
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'save_on_stop': True,
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'size': qubes.config.defaults['root_img_size'],
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}
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vm = qubes.tests.storage.TestVM(self)
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volume = self.app.get_pool(self.pool.name).init_volume(vm, config)
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self.assertIsInstance(volume, ThinVolume)
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self.assertEqual(volume.name, 'root')
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self.assertEqual(volume.pool, self.pool.name)
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self.assertEqual(volume.size, qubes.config.defaults['root_img_size'])
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volume.create()
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path = "/dev/%s" % volume.vid
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self.assertTrue(os.path.exists(path))
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self.pool.remove(volume)
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@skipUnlessLvmPoolExists
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class TC_01_ThinPool(qubes.tests.SystemTestsMixin, ThinPoolBase):
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''' Sanity tests for :py:class:`qubes.storage.lvm.ThinPool` '''
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def setUp(self):
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super(TC_01_ThinPool, self).setUp()
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self.init_default_template()
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def test_004_import(self):
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template_vm = self.app.default_template
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name = self.make_vm_name('import')
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vm = self.app.add_new_vm(qubes.vm.templatevm.TemplateVM, name=name,
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label='red')
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vm.clone_properties(template_vm)
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vm.clone_disk_files(template_vm, pool='test-lvm')
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for v_name, volume in vm.volumes.items():
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if volume.save_on_stop:
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expected = "/dev/{!s}/{!s}-{!s}".format(
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DEFAULT_LVM_POOL.split('/')[0], vm.name, v_name)
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self.assertEqual(volume.path, expected)
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with self.assertNotRaises(qubes.exc.QubesException):
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vm.start()
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def test_005_create_appvm(self):
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vm = self.app.add_new_vm(cls=qubes.vm.appvm.AppVM,
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name=self.make_vm_name('appvm'), label='red')
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vm.create_on_disk(pool='test-lvm')
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for v_name, volume in vm.volumes.items():
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if volume.save_on_stop:
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expected = "/dev/{!s}/{!s}-{!s}".format(
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DEFAULT_LVM_POOL.split('/')[0], vm.name, v_name)
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self.assertEqual(volume.path, expected)
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with self.assertNotRaises(qubes.exc.QubesException):
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vm.start()
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