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#!/usr/bin/env python3
# systemd integration test: Handling of storage devices
# (C) 2015 Canonical Ltd.
# Author: Martin Pitt <martin.pitt@ubuntu.com>
import os
import random
import subprocess
import sys
import time
import unittest
from glob import glob
from threading import Thread
TIMEOUT_SERVICE_START = 10
TIMEOUT_PASSWORD_AGENT_STOP = 10
TIMEOUT_PLAINTEXT_DEV = 30
TIMEOUT_SCSI_DEBUG_ADD_HOST = 5
SCSI_DEBUG_DIR = '/sys/bus/pseudo/drivers/scsi_debug'
def have_scsi_debug():
return os.path.isdir(SCSI_DEBUG_DIR)
def load_scsi_debug():
return subprocess.call(['modprobe', 'scsi_debug', 'dev_size_mb=32'],
stderr=subprocess.STDOUT) == 0
# Some custom Ubuntu kernels do not build the scsi_debug module at all,
# so skip the test if we can't load the module (LP: #1847816)
# This doesn't (currently) apply to Debian, as scsi_debug should always
# be available in Debian kernels
@unittest.skipIf(not have_scsi_debug() and not load_scsi_debug(), 'Failed to load scsi_debug module')
class FakeDriveTestBase(unittest.TestCase):
@classmethod
def setUpClass(cls):
assert have_scsi_debug()
def setUp(self):
existing_adapters = set(glob(os.path.join(SCSI_DEBUG_DIR, 'adapter*')))
with open(os.path.join(SCSI_DEBUG_DIR, 'add_host'), 'w') as f:
f.write('1')
new_adapters = set(glob(os.path.join(SCSI_DEBUG_DIR, 'adapter*'))) - existing_adapters
self.assertEqual(len(new_adapters), 1)
self.adapter = new_adapters.pop()
for timeout in range(TIMEOUT_SCSI_DEBUG_ADD_HOST):
devices = set(glob(os.path.join(self.adapter, 'host*/target*/*:*/block/*')))
if len(devices) > 0:
break
time.sleep(1)
else:
self.fail('Timed out waiting for scsi_debug block device name')
self.assertEqual(len(devices), 1)
self.device = os.path.join('/dev/', os.path.basename(devices.pop()))
def tearDown(self):
existing_adapters = set(glob(os.path.join(SCSI_DEBUG_DIR, 'adapter*')))
with open(os.path.join(SCSI_DEBUG_DIR, 'add_host'), 'w') as f:
f.write('-1')
removed_adapters = existing_adapters - set(glob(os.path.join(SCSI_DEBUG_DIR, 'adapter*')))
self.assertEqual(len(removed_adapters), 1)
adapter = removed_adapters.pop()
self.assertEqual(self.adapter, adapter)
self.adapter = None
self.device = None
class CryptsetupTest(FakeDriveTestBase):
def setUp(self):
testname = self.id().split('.')[-1]
self.plaintext_name = 'testcrypt_%s' % testname
self.plaintext_dev = '/dev/mapper/' + self.plaintext_name
self.service_name = 'systemd-cryptsetup@%s.service' % self.plaintext_name
if os.path.exists(self.plaintext_dev):
self.fail('%s exists already' % self.plaintext_dev)
super().setUp()
if os.path.exists('/etc/crypttab'):
os.rename('/etc/crypttab', '/etc/crypttab.systemdtest')
self.password = 'pwd%i' % random.randint(1000, 10000)
self.password_agent = None
self.password_agent_stop = False
def tearDown(self):
if self.password_agent:
self.password_agent_stop = True
self.password_agent.join(timeout=TIMEOUT_PASSWORD_AGENT_STOP)
self.assertFalse(self.password_agent.is_alive())
self.password_agent = None
for timeout in range(TIMEOUT_SERVICE_START):
state = subprocess.run(['systemctl', 'show', '--no-pager', self.service_name, '--property', 'ActiveState'],
stdout=subprocess.PIPE, universal_newlines=True).stdout
state = state.strip().replace('ActiveState=', '', 1)
if state in ['active', 'failed']:
break
time.sleep(1)
else:
self.fail('Timed out waiting for %s to start (or fail)' % self.service_name)
subprocess.call(['umount', self.plaintext_dev], stderr=subprocess.DEVNULL)
if state == 'active':
subprocess.call(['systemctl', 'stop', self.service_name], stderr=subprocess.STDOUT)
if os.path.exists('/etc/crypttab'):
os.unlink('/etc/crypttab')
if os.path.exists('/etc/crypttab.systemdtest'):
os.rename('/etc/crypttab.systemdtest', '/etc/crypttab')
if os.path.exists(self.plaintext_dev):
subprocess.call(['dmsetup', 'remove', self.plaintext_dev],
stderr=subprocess.STDOUT)
subprocess.check_call(['systemctl', 'daemon-reload'])
super().tearDown()
def format_luks(self):
'''Format test device with LUKS'''
p = subprocess.Popen(['cryptsetup', '--batch-mode', 'luksFormat', self.device, '-'],
stdin=subprocess.PIPE)
p.communicate(self.password.encode())
self.assertEqual(p.returncode, 0)
os.sync()
subprocess.check_call(['udevadm', 'settle'])
def start_password_agent(self):
'''Run password agent to answer passphrase request for crypt device'''
# wait for incoming request
found = False
while not found:
for ask in glob('/run/systemd/ask-password/ask.*'):
with open(ask) as f:
contents = f.read()
if self.plaintext_name in contents:
found = True
break
if not found:
if self.password_agent_stop:
return
time.sleep(0.5)
# parse Socket=
for line in contents.splitlines():
if line.startswith('Socket='):
socket = line.split('=', 1)[1]
break
else:
self.fail('Could not find socket')
# send reply
p = subprocess.Popen(['/lib/systemd/systemd-reply-password', '1', socket],
stdin=subprocess.PIPE)
p.communicate(self.password.encode())
self.assertEqual(p.returncode, 0)
def apply(self, target):
'''Tell systemd to generate and run the cryptsetup units'''
subprocess.check_call(['systemctl', 'daemon-reload'])
self.password_agent = Thread(target=self.start_password_agent);
self.password_agent.start()
subprocess.check_call(['systemctl', '--no-ask-password', 'restart', target])
for timeout in range(TIMEOUT_PLAINTEXT_DEV):
if os.path.exists(self.plaintext_dev):
break
time.sleep(1)
else:
self.fail('Timed out waiting for %s to appear' % self.plaintext_dev)
def test_luks_by_devname(self):
'''LUKS device by plain device name, empty'''
self.format_luks()
with open('/etc/crypttab', 'w') as f:
f.write('%s %s none luks\n' % (self.plaintext_name, self.device))
self.apply('cryptsetup.target')
# should not be mounted
with open('/proc/mounts') as f:
self.assertNotRegex(f.read(), "(?<!/run/credentials/systemd-cryptsetup@)%s" % (self.plaintext_name))
# device should not have anything on it
p = subprocess.Popen(['blkid', self.plaintext_dev], stdout=subprocess.PIPE)
out = p.communicate()[0]
self.assertEqual(out, b'')
self.assertNotEqual(p.returncode, 0)
def test_luks_by_uuid(self):
'''LUKS device by UUID, empty'''
self.format_luks()
uuid = subprocess.check_output(['blkid', '-ovalue', '-sUUID', self.device],
universal_newlines=True).strip()
with open('/etc/crypttab', 'w') as f:
f.write('%s UUID=%s none luks\n' % (self.plaintext_name, uuid))
self.apply('cryptsetup.target')
# should not be mounted
with open('/proc/mounts') as f:
self.assertNotRegex(f.read(), "(?<!/run/credentials/systemd-cryptsetup@)%s" % (self.plaintext_name))
# device should not have anything on it
p = subprocess.Popen(['blkid', self.plaintext_dev], stdout=subprocess.PIPE)
out = p.communicate()[0]
self.assertEqual(out, b'')
self.assertNotEqual(p.returncode, 0)
def test_luks_swap(self):
'''LUKS device with "swap" option'''
self.format_luks()
with open('/etc/crypttab', 'w') as f:
f.write('%s %s none luks,swap\n' % (self.plaintext_name, self.device))
self.apply('cryptsetup.target')
# should not be mounted
with open('/proc/mounts') as f:
self.assertNotRegex(f.read(), "(?<!/run/credentials/systemd-cryptsetup@)%s" % (self.plaintext_name))
# device should be formatted with swap
out = subprocess.check_output(['blkid', '-ovalue', '-sTYPE', self.plaintext_dev])
self.assertEqual(out, b'swap\n')
def test_luks_tmp(self):
'''LUKS device with "tmp" option'''
self.format_luks()
with open('/etc/crypttab', 'w') as f:
f.write('%s %s none luks,tmp\n' % (self.plaintext_name, self.device))
self.apply('cryptsetup.target')
# should not be mounted
with open('/proc/mounts') as f:
self.assertNotRegex(f.read(), "(?<!/run/credentials/systemd-cryptsetup@)%s" % (self.plaintext_name))
# device should be formatted with ext2 or (with newer systemd) ext4
out = subprocess.check_output(['blkid', '-ovalue', '-sTYPE', self.plaintext_dev])
self.assertRegex(out, b'ext[24]')
def test_luks_fstab(self):
'''LUKS device in /etc/fstab'''
self.format_luks()
with open('/etc/crypttab', 'w') as f:
f.write('%s %s none luks,tmp\n' % (self.plaintext_name, self.device))
mountpoint = '/run/crypt1.systemdtest'
os.mkdir(mountpoint)
self.addCleanup(os.rmdir, mountpoint)
os.rename('/etc/fstab', '/etc/fstab.systemdtest')
self.addCleanup(os.rename, '/etc/fstab.systemdtest', '/etc/fstab')
with open('/etc/fstab', 'a') as f:
with open('/etc/fstab.systemdtest') as forig:
f.write(forig.read())
f.write('%s %s auto defaults 0 0\n' % (self.plaintext_dev, mountpoint))
# this should now be a requirement of local-fs.target
self.apply('local-fs.target')
# should be mounted
found = False
with open('/proc/mounts') as f:
for line in f:
fields = line.split()
if fields[0] == self.plaintext_dev:
self.assertEqual(fields[1], mountpoint)
self.assertRegex(fields[2], 'ext[24]')
found = True
break
if not found:
self.fail('%s is not mounted' % self.plaintext_dev)
if __name__ == '__main__':
unittest.main(testRunner=unittest.TextTestRunner(stream=sys.stdout,
verbosity=2))
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