Added storage class for persistent data storage

tuned/plugins/plugin_sysctl.py

@@ -1,6 +1,7 @@
 import tuned.plugins
 import tuned.logs
 import tuned.monitors
+import tuned.utils.storage
 import os
 import struct
 import glob
@@ -53,6 +54,11 @@ class SysctlPlugin(tuned.plugins.Plugin):
 				self._sysctl_original[k] = v
 
 			self._exec_sysctl(key + "=" + value, True)
+
+		storage = tuned.utils.storage.Storage.get_instance()
+		storage.data = {"sysctl" : self._sysctl_original}
+		storage.save()
+
 		return True
 
 	def _revert_sysctl(self):

tuned/utils/storage.py

@@ -0,0 +1,57 @@
+# Copyright (C) 2008-2012 Red Hat, Inc.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+
+import tuned.patterns
+import tuned.logs
+import tuned.utils
+import pickle
+
+log = tuned.logs.get()
+
+DEFAULT_STORAGE_FILE = "./save.pickle"
+
+class Storage(tuned.patterns.Singleton):
+	def __init__(self):
+		super(self.__class__, self).__init__()
+		self._data = {}
+		self.load()
+
+	@property
+	def data(self):
+		return self._data
+
+	@data.setter
+	def data(self, data):
+		self._data.update(data)
+
+	def save(self):
+		try:
+			with open(DEFAULT_STORAGE_FILE, "w") as f:
+				pickle.dump(self._data, f)
+		except (OSError,IOError) as e:
+			log.error("Error saving storage file %s: %s" % (DEFAULT_STORAGE_FILE, e))
+
+	def load(self):
+		try:
+			with open(DEFAULT_STORAGE_FILE, "r") as f:
+				self._data = pickle.load(f)
+		except (OSError,IOError) as e:
+			log.error("Error loading storage file %s: %s" % (DEFAULT_STORAGE_FILE, e))
+			self._data = {}
+		except EOFError:
+			self._data = {}
+