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# Copyright (c) 2016 Red Hat, Inc.
#
# 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.
import os
import errno
from functools import wraps
from gluster.exceptions import VolumeNotMounted
def validate_mount(func):
"""
Decorator to assert that volume is initialized and mounted before any
further I/O calls are invoked by methods.
:param func: method to be decorated and checked.
"""
def _exception(volname):
raise VolumeNotMounted('Volume "%s" not mounted.' % (volname))
@wraps(func)
def wrapper(*args, **kwargs):
self = args[0]
if self.fs and self._mounted:
return func(*args, **kwargs)
else:
return _exception(self.volname)
wrapper.__wrapped__ = func
return wrapper
def validate_glfd(func):
"""
Decorator to assert that glfd is valid.
:param func: method to be decorated and checked.
"""
def _exception():
raise OSError(errno.EBADF, os.strerror(errno.EBADF))
@wraps(func)
def wrapper(*args, **kwargs):
self = args[0]
if self.fd:
return func(*args, **kwargs)
else:
return _exception()
wrapper.__wrapped__ = func
return wrapper
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