379 lines
15 KiB
Python
379 lines
15 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) 2020 David Hobach <david@hobach.de>
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This library 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 GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, see <https://www.gnu.org/licenses/>.
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#
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''' Tests for the callback storage driver.
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They are mostly based upon the lvm storage driver tests.
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'''
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# pylint: disable=line-too-long
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import os
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import json
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import subprocess
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import qubes.tests
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import qubes.tests.storage
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import qubes.tests.storage_lvm
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from qubes.tests.storage_lvm import skipUnlessLvmPoolExists
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from qubes.storage.callback import CallbackPool, CallbackVolume
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CB_CONF = '/etc/qubes_callback.json'
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LOG_BIN = '/tmp/testCbLogArgs'
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CB_DATA = {'utest-callback-01': {
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'bdriver': 'lvm_thin',
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'bdriver_args': {
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'volume_group': qubes.tests.storage_lvm.DEFAULT_LVM_POOL.split('/')[0],
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'thin_pool': qubes.tests.storage_lvm.DEFAULT_LVM_POOL.split('/')[1]
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},
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'description': 'For unit testing of the callback pool driver.'
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},
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'utest-callback-02': {
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'bdriver': 'lvm_thin',
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'bdriver_args': {
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'volume_group': qubes.tests.storage_lvm.DEFAULT_LVM_POOL.split('/')[0],
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'thin_pool': qubes.tests.storage_lvm.DEFAULT_LVM_POOL.split('/')[1]
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},
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'cmd': LOG_BIN,
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'description': 'For unit testing of the callback pool driver.'
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},
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'utest-callback-03': {
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'bdriver': 'lvm_thin',
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'bdriver_args': {
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'volume_group': qubes.tests.storage_lvm.DEFAULT_LVM_POOL.split('/')[0],
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'thin_pool': qubes.tests.storage_lvm.DEFAULT_LVM_POOL.split('/')[1]
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},
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'cmd': 'exit 1',
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'pre_sinit': LOG_BIN + ' pre_sinit',
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'pre_setup': LOG_BIN + ' pre_setup',
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'pre_volume_create': LOG_BIN + ' pre_volume_create',
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'post_volume_create': LOG_BIN + ' post_volume_create',
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'pre_volume_import_data': LOG_BIN + ' pre_volume_import_data',
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'post_volume_import_data_end': LOG_BIN + ' post_volume_import_data_end',
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'post_volume_remove': LOG_BIN + ' post_volume_remove',
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'post_destroy': '-',
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'description': 'For unit testing of the callback pool driver.'
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},
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'testing-fail-missing-all': {
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},
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'testing-fail-missing-bdriver-args': {
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'bdriver': 'file',
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'description': 'For unit testing of the callback pool driver.'
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},
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'testing-fail-incorrect-bdriver': {
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'bdriver': 'nonexisting-bdriver',
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'bdriver_args': {
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'foo': 'bar',
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'bla': 'blub'
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},
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'cmd': 'echo foo',
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'description': 'For unit testing of the callback pool driver.'
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},
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}
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class CallbackBase:
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''' Mixin base class for callback tests. Has no base class. '''
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conf_id = None
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pool_name = 'test-callback'
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@classmethod
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def setUpClass(cls, conf_id='utest-callback-01'):
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conf = {'name': cls.pool_name,
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'driver': 'callback',
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'conf_id': conf_id}
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cls.conf_id = conf_id
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assert not(os.path.exists(CB_CONF)), '%s must NOT exist. Please delete it, if you do not need it.' % CB_CONF
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sudo = [] if os.getuid() == 0 else ['sudo']
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subprocess.run(sudo + ['install', '-m', '666', '/dev/null', CB_CONF], check=True)
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with open(CB_CONF, 'w') as outfile:
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json.dump(CB_DATA, outfile)
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super().setUpClass(pool_class=CallbackPool, volume_class=CallbackVolume, pool_conf=conf)
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@classmethod
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def tearDownClass(cls):
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super().tearDownClass()
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sudo = [] if os.getuid() == 0 else ['sudo']
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subprocess.run(sudo + ['rm', '-f', CB_CONF], check=True)
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def setUp(self, init_pool=True):
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super().setUp(init_pool=init_pool)
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if init_pool:
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#tests from other pools will assume that they're fully initialized after calling __init__()
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self.loop.run_until_complete(self.pool._assert_initialized())
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def test_000_000_callback_test_init(self):
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''' Check whether the test init did work. '''
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if hasattr(self, 'pool'):
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self.assertIsInstance(self.pool, CallbackPool)
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self.assertEqual(self.pool.backend_class, qubes.storage.lvm.ThinPool)
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self.assertTrue(os.path.isfile(CB_CONF))
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@skipUnlessLvmPoolExists
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class TC_00_CallbackPool(CallbackBase, qubes.tests.storage_lvm.TC_00_ThinPool):
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pass
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@skipUnlessLvmPoolExists
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class TC_01_CallbackPool(CallbackBase, qubes.tests.storage_lvm.TC_01_ThinPool):
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pass
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@skipUnlessLvmPoolExists
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class TC_02_cb_StorageHelpers(CallbackBase, qubes.tests.storage_lvm.TC_02_StorageHelpers):
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pass
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class LoggingCallbackBase(CallbackBase):
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''' Mixin base class that sets up LOG_BIN and removes `LoggingCallbackBase.test_log`, if needed. '''
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test_log = '/tmp/cb_tests.log'
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test_log_expected = None #dict: class + test name --> test index (int, 0..x) --> expected _additional_ log content
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volume_name = 'volume_name'
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xml_path = '/tmp/qubes-test-callback.xml'
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@classmethod
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def setUpClass(cls, conf_id=None, log_expected=None):
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script = """#!/bin/bash
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i=1
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for arg in "$@" ; do
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echo "$i: $arg" >> "LOG_OUT"
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(( i++))
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done
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exit 0
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"""
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script = script.replace('LOG_OUT', cls.test_log)
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with open(LOG_BIN, 'w') as f:
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f.write(script)
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os.chmod(LOG_BIN, 0o775)
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cls.test_log_expected = log_expected
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super().setUpClass(conf_id=conf_id)
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@classmethod
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def tearDownClass(cls):
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super().tearDownClass()
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os.remove(LOG_BIN)
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def setUp(self, init_pool=False):
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assert not(os.path.exists(self.test_log)), '%s must NOT exist. Please delete it, if you do not need it.' % self.test_log
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self.maxDiff = None
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xml = """
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<qubes>
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<labels>
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<label color="0x000000" id="label-8">black</label>
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</labels>
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<pools>
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<pool dir_path="/var/lib/qubes" driver="file" name="varlibqubes" revisions_to_keep="1"/>
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<pool dir_path="/var/lib/qubes/vm-kernels" driver="linux-kernel" name="linux-kernel"/>
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<pool conf_id="CONF_ID" driver="callback" name="POOL_NAME"/>
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</pools>
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<properties>
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<property name="clockvm"></property>
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<property name="default_pool_kernel">linux-kernel</property>
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<property name="default_template"></property>
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<property name="updatevm"></property>
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</properties>
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<domains>
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<domain id="domain-0" class="AdminVM">
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<properties>
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<property name="label">black</property>
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</properties>
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<features/>
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<tags/>
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</domain>
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</domains>
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</qubes>
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"""
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xml = xml.replace('CONF_ID', self.conf_id)
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xml = xml.replace('POOL_NAME', self.pool_name)
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with open(self.xml_path, 'w') as f:
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f.write(xml)
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self.app = qubes.Qubes(self.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'] = self.xml_path
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super().setUp(init_pool=init_pool)
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def tearDown(self):
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super().tearDown()
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os.unlink(self.app.store)
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self.app.close()
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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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if os.path.exists(self.test_log):
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os.remove(self.test_log)
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if os.path.exists(self.xml_path):
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os.remove(self.xml_path)
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def assertLogContent(self, expected):
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''' Assert that the log matches the given string.
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:param expected: Expected content of the log file (String).
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'''
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try:
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with open(self.test_log, 'r') as f:
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found = f.read()
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except FileNotFoundError:
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found = ''
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if expected != '':
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expected = expected + '\n'
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self.assertEqual(found, expected)
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def assertLog(self, test_name, ind=0):
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''' Assert that the log matches the expected status.
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:param test_name: Name of the test.
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:param ind: Index inside `test_log_expected` to check against (Integer starting at 0).
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'''
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d = self.test_log_expected[str(self.__class__) + test_name]
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expected = []
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for i in range(ind+1):
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expected = expected + [d[i]]
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expected = filter(None, expected)
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self.assertLogContent('\n'.join(expected))
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def test_001_callbacks(self):
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''' create a lvm pool with additional callbacks '''
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config = {
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'name': self.volume_name,
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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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'revisions_to_keep': 2,
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'size': qubes.config.defaults['root_img_size'],
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}
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new_size = 2 * qubes.config.defaults['root_img_size']
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test_name = 'test_001_callbacks'
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self.assertLog(test_name, 0)
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self.init_pool()
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self.assertFalse(self.created_pool)
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self.assertIsInstance(self.pool, CallbackPool)
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self.assertLog(test_name, 1)
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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.assertLog(test_name, 2)
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self.loop.run_until_complete(volume.create())
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self.assertLog(test_name, 3)
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self.loop.run_until_complete(volume.import_data(new_size))
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self.assertLog(test_name, 4)
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self.loop.run_until_complete(volume.import_data_end(True))
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self.assertLog(test_name, 5)
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self.assertEqual(volume.size, new_size)
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self.loop.run_until_complete(volume.remove())
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self.assertLog(test_name, 6)
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@skipUnlessLvmPoolExists
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class TC_91_CallbackPool(LoggingCallbackBase, qubes.tests.storage_lvm.ThinPoolBase):
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''' Tests for the actual callback functionality.
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conf_id = utest-callback-02
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'''
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@classmethod
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def setUpClass(cls):
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conf_id = 'utest-callback-02'
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name = cls.pool_name
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bdriver = (CB_DATA[conf_id])['bdriver']
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ctor_params = json.dumps(CB_DATA[conf_id], sort_keys=True, indent=2)
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vname = cls.volume_name
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vid = '{0}/vm-test-inst-appvm-{1}'.format(qubes.tests.storage_lvm.DEFAULT_LVM_POOL.split('/')[0], vname)
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vsize = 2 * qubes.config.defaults['root_img_size']
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log_expected = \
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{str(cls) + 'test_001_callbacks':
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{0: '',
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1: '',
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2: '',
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3: '1: {0}\n2: {1}\n3: pre_sinit\n4: {2}\n5: {3}\n1: {0}\n2: {1}\n3: pre_volume_create\n4: {2}\n5: {3}\n6: {4}\n7: {5}\n8: None\n1: {0}\n2: {1}\n3: post_volume_create\n4: {2}\n5: {3}\n6: {4}\n7: {5}\n8: None'.format(name, bdriver, conf_id, ctor_params, vname, vid),
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4: '1: {0}\n2: {1}\n3: pre_volume_import_data\n4: {2}\n5: {3}\n6: {4}\n7: {5}\n8: None\n9: {6}'.format(name, bdriver, conf_id, ctor_params, vname, vid, vsize),
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5: '1: {0}\n2: {1}\n3: post_volume_import_data_end\n4: {2}\n5: {3}\n6: {4}\n7: {5}\n8: None\n9: {6}'.format(name, bdriver, conf_id, ctor_params, vname, vid, True),
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6: '1: {0}\n2: {1}\n3: post_volume_remove\n4: {2}\n5: {3}\n6: {4}\n7: {5}\n8: None'.format(name, bdriver, conf_id, ctor_params, vname, vid),
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}
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}
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super().setUpClass(conf_id=conf_id, log_expected=log_expected)
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@skipUnlessLvmPoolExists
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class TC_92_CallbackPool(LoggingCallbackBase, qubes.tests.storage_lvm.ThinPoolBase):
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''' Tests for the actual callback functionality.
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conf_id = utest-callback-03
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'''
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@classmethod
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def setUpClass(cls):
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log_expected = \
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{str(cls) + 'test_001_callbacks':
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{0: '',
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1: '',
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2: '',
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3: '1: pre_sinit\n1: pre_volume_create\n1: post_volume_create',
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4: '1: pre_volume_import_data',
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5: '1: post_volume_import_data_end',
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6: '1: post_volume_remove',
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}
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}
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super().setUpClass(conf_id='utest-callback-03', log_expected=log_expected)
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def test_002_failing_callback(self):
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''' Make sure that we check the exit code of executed callbacks. '''
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config = {
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'name': self.volume_name,
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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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'revisions_to_keep': 2,
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'size': qubes.config.defaults['root_img_size'],
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}
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self.init_pool()
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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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with self.assertRaises(subprocess.CalledProcessError) as cm:
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#should trigger the `exit 1` of `cmd`
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self.loop.run_until_complete(volume.start())
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self.assertTrue('exit status 1' in str(cm.exception))
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def test_003_errors(self):
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''' Make sure we error out on common user & dev mistakes. '''
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#missing conf_id
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with self.assertRaises(qubes.storage.StoragePoolException):
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cb = CallbackPool(name='some-name', conf_id='')
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#invalid conf_id
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with self.assertRaises(qubes.storage.StoragePoolException):
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cb = CallbackPool(name='some-name', conf_id='nonexisting-id')
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#incorrect backend driver
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with self.assertRaises(qubes.storage.StoragePoolException):
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cb = CallbackPool(name='some-name', conf_id='testing-fail-incorrect-bdriver')
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#missing config entries
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with self.assertRaises(qubes.storage.StoragePoolException):
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cb = CallbackPool(name='some-name', conf_id='testing-fail-missing-all')
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#missing bdriver args
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with self.assertRaises(TypeError):
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cb = CallbackPool(name='some-name', conf_id='testing-fail-missing-bdriver-args')
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class TC_93_CallbackPool(qubes.tests.QubesTestCase):
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def test_001_missing_conf(self):
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''' A missing config file must cause errors. '''
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with self.assertRaises(FileNotFoundError):
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cb = CallbackPool(name='some-name', conf_id='nonexisting-id')
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