def test_lazy_unmount(self):
src_file = pjoin(self.source, 'file')
bind_file = pjoin(self.target, 'file')
touch(src_file)
with open(src_file, 'w') as f:
f.write('foo')
try:
with Namespace(user=True, mount=True):
mount(self.source, self.target, None, MS_BIND)
assert os.path.exists(bind_file)
with open(bind_file) as f:
# can't unmount the target due to the open file
with pytest.raises(OSError) as cm:
umount(self.target)
assert cm.value.errno == errno.EBUSY
# lazily unmount instead
umount(self.target, MNT_DETACH)
# confirm the file doesn't exist in the bind mount anymore
assert not os.path.exists(bind_file)
# but the file is still accessible to the process
assert f.read() == 'foo'
# trying to reopen causes IOError
with pytest.raises(IOError) as cm:
f = open(bind_file)
assert cm.value.errno == errno.ENOENT
except PermissionError:
pytest.skip('No permission to use user and mount namespace')
def test_no_perms(self):
with pytest.raises(OSError) as cm:
mount(self.source, self.target, None, MS_BIND)
assert cm.value.errno in (errno.EPERM, errno.EACCES)
with pytest.raises(OSError) as cm:
umount(self.target)
assert cm.value.errno in (errno.EPERM, errno.EINVAL)
def test_root(self):
# test umount
mount(self.source, self.target, None, MS_BIND)
umount(self.target)
# test umount2
mount(self.source, self.target, None, MS_BIND)
umount(self.target, MNT_FORCE)
def _umount_archive(self):
"""Unmount the squashfs archive."""
try:
umount(self.location)
return
except FileNotFoundError as e:
raise repo_errors.InitializationError(
f'failed unmounting squashfs archive: {e.filename} required')
except OSError as e:
# fail out if not a permissions issue (regular or loopback failure inside userns)
if e.errno not in (errno.EPERM, errno.EPIPE):
raise repo_errors.InitializationError(
f'failed unmounting squashfs archive: {e.strerror}')
# fallback to using fusermount
try:
# TODO: switch to capture_output=True when >= py3.7
ret = subprocess.run(['fusermount', '-u', self.location],
stderr=subprocess.PIPE,
stdout=subprocess.PIPE)
except FileNotFoundError as e:
raise repo_errors.InitializationError(
f'failed unmounting squashfs archive: {e.filename} required')
if ret.returncode:
self._failed_cmd(ret, 'unmounting')
def test_lazy_unmount(self):
src_file = pjoin(self.source, 'file')
bind_file = pjoin(self.target, 'file')
touch(src_file)
with open(src_file, 'w') as f:
f.write('foo')
try:
with Namespace(user=True, mount=True):
mount(self.source, self.target, None, MS_BIND)
assert os.path.exists(bind_file)
with open(bind_file) as f:
# can't unmount the target due to the open file
with pytest.raises(OSError) as cm:
umount(self.target)
assert cm.value.errno == errno.EBUSY
# lazily unmount instead
umount(self.target, MNT_DETACH)
# confirm the file doesn't exist in the bind mount anymore
assert not os.path.exists(bind_file)
# but the file is still accessible to the process
assert f.read() == 'foo'
# trying to reopen causes IOError
with pytest.raises(IOError) as cm:
f = open(bind_file)
assert cm.value.errno == errno.ENOENT
except PermissionError:
pytest.skip('No permission to use user and mount namespace')
def test_no_perms(self):
with self.assertRaises(OSError) as cm:
mount(self.source, self.target, None, MS_BIND)
self.assertTrue(cm.exception.errno in (errno.EPERM, errno.EACCES))
with self.assertRaises(OSError) as cm:
umount(self.target)
self.assertTrue(cm.exception.errno in (errno.EPERM, errno.EINVAL))
def test_no_perms(self):
with pytest.raises(OSError) as cm:
mount(self.source, self.target, None, MS_BIND)
assert cm.value.errno in (errno.EPERM, errno.EACCES)
with pytest.raises(OSError) as cm:
umount(self.target)
assert cm.value.errno in (errno.EPERM, errno.EINVAL)
def test_root(self):
# test umount
mount(self.source, self.target, None, MS_BIND)
umount(self.target)
# test umount2
mount(self.source, self.target, None, MS_BIND)
umount(self.target, MNT_FORCE)
def test_no_perms(self):
with self.assertRaises(OSError) as cm:
mount(self.source, self.target, None, MS_BIND)
self.assertTrue(cm.exception.errno in (errno.EPERM, errno.EACCES))
with self.assertRaises(OSError) as cm:
umount(self.target)
self.assertTrue(cm.exception.errno in (errno.EPERM, errno.EINVAL))
def _umount_archive(self):
"""Unmount the squashfs archive."""
try:
umount(self.location)
return
except FileNotFoundError as e:
raise repo_errors.InitializationError(
f'failed unmounting squashfs archive: {e.filename} required')
except OSError as e:
# fail out if not a permissions issue (regular or loopback failure inside userns)
if e.errno not in (errno.EPERM, errno.EPIPE):
raise repo_errors.InitializationError(
f'failed unmounting squashfs archive: {e.strerror}')
# fallback to using fusermount
try:
# TODO: switch to capture_output=True when >= py3.7
ret = subprocess.run(
['fusermount', '-u', self.location],
stderr=subprocess.PIPE, stdout=subprocess.PIPE)
except FileNotFoundError as e:
raise repo_errors.InitializationError(
f'failed unmounting squashfs archive: {e.filename} required')
if ret.returncode:
self._failed_cmd(ret, 'unmounting')
def test_bind_mount(self):
src_file = pjoin(self.source, 'file')
bind_file = pjoin(self.target, 'file')
touch(src_file)
try:
with Namespace(user=True, mount=True):
assert not os.path.exists(bind_file)
mount(self.source, self.target, None, MS_BIND)
assert os.path.exists(bind_file)
umount(self.target)
assert not os.path.exists(bind_file)
except PermissionError:
pytest.skip('No permission to use user and mount namespace')
def test_bind_mount(self):
src_file = pjoin(self.source, 'file')
bind_file = pjoin(self.target, 'file')
touch(src_file)
try:
with Namespace(user=True, mount=True):
assert not os.path.exists(bind_file)
mount(self.source, self.target, None, MS_BIND)
assert os.path.exists(bind_file)
umount(self.target)
assert not os.path.exists(bind_file)
except PermissionError:
pytest.skip('No permission to use user and mount namespace')
