core-admin/core-modules/001QubesResizableVm.py

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#!/usr/bin/python2
# -*- encoding: utf8 -*-
#
# The Qubes OS Project, http://www.qubes-os.org
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
#
from __future__ import (
absolute_import,
division,
print_function,
unicode_literals,
)
from qubes.qubes import (
register_qubes_vm_class,
QubesException,
QubesVm,
)
class QubesResizableVm(QubesVm):
def resize_root_img(self, size):
if self.template:
raise QubesException("Cannot resize root.img of template-based VM"
". Resize the root.img of the template "
"instead.")
if self.is_running():
raise QubesException("Cannot resize root.img of running VM")
if size < self.get_root_img_sz():
raise QubesException(
"For your own safety shringing of root.img is disabled. If "
"you really know what you are doing, use 'truncate' manually.")
f_root = open(self.root_img, "a+b")
f_root.truncate(size)
f_root.close()
class QubesResizableVmWithResize2fs(QubesResizableVm):
def resize_root_img(self, size):
super(QubesResizableVmWithResize2fs, self).resize_root_img(size)
self.start()
self.run("sudo resize2fs /dev/mapper/dmroot")
self.shutdown()
register_qubes_vm_class(QubesResizableVm)
register_qubes_vm_class(QubesResizableVmWithResize2fs)