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# vim:expandtab:autoindent:tabstop=4:shiftwidth=4:filetype=python:textwidth=0:
# License: GPL2 or later see COPYING
# Written by Michael Brown
# Copyright (C) 2007 Michael E Brown <mebrown@michaels-house.net>
# python library imports
import os
# our imports
from mock.trace_decorator import decorate, traceLog, getLog
import mock.util
requires_api_version = "1.0"
# plugin entry point
decorate(traceLog())
def init(rootObj, conf):
system_ram_bytes = os.sysconf(os.sysconf_names['SC_PAGE_SIZE']) * os.sysconf(os.sysconf_names['SC_PHYS_PAGES'])
system_ram_mb = system_ram_bytes / (1024 * 1024)
if system_ram_mb > conf['required_ram_mb']:
Tmpfs(rootObj, conf)
else:
getLog().warning("Tmpfs plugin disabled. "
"System does not have the required amount of RAM to enable the tmpfs plugin. "
"System has %sMB RAM, but the config specifies the minimum required is %sMB RAM. "
%
(system_ram_mb, conf['required_ram_mb']))
# classes
class Tmpfs(object):
"""Mounts a tmpfs on the chroot dir"""
decorate(traceLog())
def __init__(self, rootObj, conf):
self.rootObj = rootObj
self.conf = conf
self.maxSize = self.conf['max_fs_size']
if self.maxSize:
self.optArgs = ['-o', 'size=' + self.maxSize]
else:
self.optArgs = []
rootObj.addHook("preinit", self._tmpfsPreInitHook)
rootObj.addHook("postbuild", self._tmpfsPostBuildHook)
rootObj.addHook("initfailed", self._tmpfsPostBuildHook)
decorate(traceLog())
def _tmpfsPreInitHook(self):
getLog().info("mounting tmpfs.")
mountCmd = ["mount", "-n", "-t", "tmpfs"] + self.optArgs + \
["mock_chroot_tmpfs", self.rootObj.makeChrootPath()]
mock.util.do(mountCmd, shell=False)
decorate(traceLog())
def _tmpfsPostBuildHook(self):
getLog().info("unmounting tmpfs.")
mountCmd = ["umount", "-n", self.rootObj.makeChrootPath()]
mock.util.do(mountCmd, shell=False)
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