Add "variants" field to LUDiagnoseOS

[ganeti-local] / lib / errors.py

diff --git a/lib/errors.py b/lib/errors.py
index 82018c3..9fd9868 100644 (file)
--- a/lib/errors.py
+++ b/lib/errors.py
@@ -228,6 +228,12 @@ class StorageError(GenericError):
   """
 
 
+class InotifyError(GenericError):
+  """Error raised when there is a failure setting up an inotify watcher.
+
+  """
+
+
 class QuitGanetiException(Exception):
   """Signal that Ganeti that it must quit.
 
@@ -291,6 +297,28 @@ class ConfdRequestError(GenericError):
   """
 
 
+class ConfdMagicError(GenericError):
+  """A magic fourcc error in Ganeti confd.
+
+  Errors processing the fourcc in ganeti confd datagrams.
+
+  """
+
+
+class ConfdClientError(GenericError):
+  """A magic fourcc error in Ganeti confd.
+
+  Errors in the confd client library.
+
+  """
+
+
+class UdpDataSizeError(GenericError):
+  """UDP payload too big.
+
+  """
+
+
 # errors should be added above
 
 
@@ -311,3 +339,35 @@ def GetErrorClass(name):
             issubclass(item, GenericError)):
       item = None
   return item
+
+
+def EncodeException(err):
+  """Encodes an exception into a format that L{MaybeRaise} will recognise.
+
+  The passed L{err} argument will be formatted as a tuple (exception
+  name, arguments) that the MaybeRaise function will recognise.
+
+  @type err: GenericError child
+  @param err: usually a child of GenericError (but any exception
+      will be accepted)
+  @rtype: tuple
+  @return: tuple of (exception name, exception arguments)
+
+  """
+  return (err.__class__.__name__, err.args)
+
+
+def MaybeRaise(result):
+  """Is this looks like an encoded Ganeti exception, raise it.
+
+  This function tries to parse the passed argument and if it looks
+  like an encoding done by EncodeException, it will re-raise it.
+
+  """
+  tlt = (tuple, list)
+  if (isinstance(result, tlt) and len(result) == 2 and
+      isinstance(result[1], tlt)):
+    # custom ganeti errors
+    err_class = GetErrorClass(result[0])
+    if err_class is not None:
+      raise err_class, tuple(result[1])