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# -*- coding: utf-8 -*-
# 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 mockbuild.trace_decorator import getLog, traceLog
import mockbuild.util
requires_api_version = "1.1"
# plugin entry point
@traceLog()
def init(plugins, conf, buildroot):
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(plugins, conf, buildroot)
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'])
class Tmpfs(object):
"""Mounts a tmpfs on the chroot dir"""
@traceLog()
def __init__(self, plugins, conf, buildroot):
self.buildroot = buildroot
self.main_config = buildroot.config
self.state = buildroot.state
self.conf = conf
self.maxSize = self.conf['max_fs_size']
self.mode = self.conf['mode']
self.optArgs = ['-o', 'mode=%s' % self.mode]
self.optArgs += ['-o', 'nr_inodes=0']
if self.maxSize:
self.optArgs += ['-o', 'size=' + self.maxSize]
plugins.add_hook("mount_root", self._tmpfsMount)
plugins.add_hook("postumount", self._tmpfsPostUmount)
plugins.add_hook("umount_root", self._tmpfsUmount)
if not os.path.ismount(self.buildroot.make_chroot_path()):
self.mounted = False
else:
self.mounted = True
getLog().info("tmpfs initialized")
@traceLog()
def _tmpfsMount(self):
getLog().info("mounting tmpfs at %s.", self.buildroot.make_chroot_path())
if not self.mounted:
mountCmd = ["mount", "-n", "-t", "tmpfs"] + self.optArgs + \
["mock_chroot_tmpfs", self.buildroot.make_chroot_path()]
mockbuild.util.do(mountCmd, shell=False)
else:
getLog().info("reusing tmpfs at %s.", self.buildroot.make_chroot_path())
self.mounted = True
@traceLog()
def _tmpfsPostUmount(self):
if "keep_mounted" in self.conf and self.conf["keep_mounted"]:
self.mounted = False
else:
self._tmpfsUmount()
@traceLog()
def _tmpfsUmount(self):
if not self.mounted:
return
force = False
getLog().info("unmounting tmpfs.")
umountCmd = ["umount", "-n", self.buildroot.make_chroot_path()]
# since we're in a separate namespace, the mount will be cleaned up
# on exit, so just warn if it fails here
try:
mockbuild.util.do(umountCmd, shell=False)
except:
getLog().warning("tmpfs-plugin: exception while umounting tmpfs! (cwd: %s)", mockbuild.util.pretty_getcwd())
force = True
if force:
# try umounting with force option
umountCmd = ["umount", "-n", "-f", self.buildroot.make_chroot_path()]
try:
mockbuild.util.do(umountCmd, shell=False)
except:
getLog().warning(
"tmpfs-plugin: exception while force umounting tmpfs! (cwd: %s)", mockbuild.util.pretty_getcwd())
self.mounted = False
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