1 files changed, 62 insertions, 0 deletions
diff --git a/gluster/utils.py b/gluster/utils.py
new file mode 100644
index 0000000..833302e
--- /dev/null
+++ b/gluster/utils.py
@@ -0,0 +1,62 @@
+# 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