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-rw-r--r--contrail-agent/hooks/charmhelpers/core/kernel.py72
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diff --git a/contrail-agent/hooks/charmhelpers/core/kernel.py b/contrail-agent/hooks/charmhelpers/core/kernel.py
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+++ b/contrail-agent/hooks/charmhelpers/core/kernel.py
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+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+# Copyright 2014-2015 Canonical Limited.
+#
+# 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 re
+import subprocess
+
+from charmhelpers.osplatform import get_platform
+from charmhelpers.core.hookenv import (
+ log,
+ INFO
+)
+
+__platform__ = get_platform()
+if __platform__ == "ubuntu":
+ from charmhelpers.core.kernel_factory.ubuntu import (
+ persistent_modprobe,
+ update_initramfs,
+ ) # flake8: noqa -- ignore F401 for this import
+elif __platform__ == "centos":
+ from charmhelpers.core.kernel_factory.centos import (
+ persistent_modprobe,
+ update_initramfs,
+ ) # flake8: noqa -- ignore F401 for this import
+
+__author__ = "Jorge Niedbalski <jorge.niedbalski@canonical.com>"
+
+
+def modprobe(module, persist=True):
+ """Load a kernel module and configure for auto-load on reboot."""
+ cmd = ['modprobe', module]
+
+ log('Loading kernel module %s' % module, level=INFO)
+
+ subprocess.check_call(cmd)
+ if persist:
+ persistent_modprobe(module)
+
+
+def rmmod(module, force=False):
+ """Remove a module from the linux kernel"""
+ cmd = ['rmmod']
+ if force:
+ cmd.append('-f')
+ cmd.append(module)
+ log('Removing kernel module %s' % module, level=INFO)
+ return subprocess.check_call(cmd)
+
+
+def lsmod():
+ """Shows what kernel modules are currently loaded"""
+ return subprocess.check_output(['lsmod'],
+ universal_newlines=True)
+
+
+def is_module_loaded(module):
+ """Checks if a kernel module is already loaded"""
+ matches = re.findall('^%s[ ]+' % module, lsmod(), re.M)
+ return len(matches) > 0