storage: add unset() method

test/test_storage.py

@@ -69,6 +69,11 @@ class StoragePickleProviderTestCase(unittest.TestCase):
 		self.assertEqual("value2", provider.get("ns1", "opt2"))
 		self.assertEqual("value3", provider.get("ns2", "opt1"))
 
+		provider.unset("ns1", "opt1")
+
+		self.assertIsNone(provider.get("ns1", "opt1"))
+		self.assertEqual("value2", provider.get("ns1", "opt2"))
+
 		provider.clear()
 
 		self.assertIsNone(provider.get("ns1", "opt1"))

tuned/storage/interfaces.py

@@ -9,6 +9,9 @@ class Provider(object):
 	def get(self, namespace, option, default=None):
 		raise NotImplementedError()
 
+	def unset(self, namespace, option):
+		raise NotImplementedError()
+
 	def clear(self):
 		raise NotImplementedError()
 

tuned/storage/pickle_provider.py

@@ -24,6 +24,11 @@ class PickleProvider(interfaces.Provider):
 		self._data.setdefault(namespace, {})
 		return self._data[namespace].get(option, default)
 
+	def unset(self, namespace, option):
+		self._data.setdefault(namespace, {})
+		if option in self._data[namespace]:
+			del self._data[namespace][option]
+
 	def save(self):
 		try:
 			log.debug("Saving %s" % str(self._data))

tuned/storage/storage.py

@@ -10,3 +10,6 @@ class Storage(object):
 
 	def get(self, option, default=None):
 		return self._storage_provider.get(self._namespace, option, default)
+
+	def unset(self, option):
+		self._storage_provider.unset(self._namespace, option)