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-rw-r--r--tools/module_manager.py97
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+# Copyright 2015 Intel Corporation.
+#
+# 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.
+
+"""Simple kernel module manager implementation.
+"""
+
+import subprocess
+import logging
+from tools import tasks
+
+class KernelModuleInsertMode(object):
+ """Module manager type of insert definition.
+ """
+ MODPROBE = 1
+ INSMOD = 2 #NOT IMPLEMENTED
+
+class ModuleManager(object):
+ """Simple module manager which acts as system wrapper for Kernel Modules.
+ """
+
+ _logger = logging.getLogger(__name__)
+
+ def __init__(self, insert_mode=KernelModuleInsertMode.MODPROBE):
+ """Initializes data and sets insert mode.
+
+ :param insert_mode: insert mode defines how modules are going to
+ be inserted in system.
+ """
+ self._modules = None
+ self._insert_mode = insert_mode
+
+ def insert_modules(self, modules):
+ """Method inserts list of modules using defined insert mode.
+
+ :param modules: list of modules to be inserted. Each element on
+ list should represent format which is expected
+ by KernelModuleInsertMode (e.g. for MODPROBE it
+ would be module name).
+
+ :returns: None
+ """
+ self._modules = modules
+ for module in modules:
+ if ModuleManager.is_module_inserted(module):
+ continue
+
+ try:
+ if self._insert_mode == KernelModuleInsertMode.MODPROBE:
+ tasks.run_task(['sudo', 'modprobe', module], self._logger,
+ 'Inserting module \'%s\'...' % module, True)
+ else:
+ self._logger.error(
+ "Kernel module insert mode NOT IMPLEMENTED.")
+ raise
+
+ except subprocess.CalledProcessError:
+ self._logger.error('Unable to insert module \'%s\'.', module)
+ raise # fail catastrophically
+
+ def remove_modules(self):
+ """Removes all modules that have been previously instereted.
+ """
+ for module in self._modules:
+ # first check if module is loaded
+ if not ModuleManager.is_module_inserted(module):
+ continue
+
+ try:
+ tasks.run_task(['sudo', 'rmmod', module], self._logger,
+ 'Removing module \'%s\'...' % module, True)
+ except subprocess.CalledProcessError:
+ self._logger.error('Unable to remove module \'%s\'.', module)
+ continue
+
+ @staticmethod
+ def is_module_inserted(module):
+ """Check if a module is inserted on system.
+ """
+ with open('/proc/modules') as mod_file:
+ loaded_mods = mod_file.readlines()
+
+ # first check if module is loaded
+ for line in loaded_mods:
+ if line.startswith(module):
+ return True
+ return False