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"""
Wrapper for UEFI operations
"""
# -*- coding: utf-8 -*-
#
# uefi.py
#
# Copyright 2015 Neil Williams <codehelp@debian.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 3 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, see <http://www.gnu.org/licenses/>.
# pylint: disable=missing-docstring,duplicate-code
import os
import logging
import cliapp
from vmdebootstrap.base import (
Base,
runcmd,
mount_wrapper,
umount_wrapper,
)
from vmdebootstrap.constants import arch_table
class Uefi(Base):
name = 'uefi'
def __init__(self):
super(Uefi, self).__init__()
self.bootdir = None
def check_settings(self, oldstable=False):
if not self.settings['use-uefi'] and self.settings['esp-size'] != 5242880:
raise cliapp.AppException(
'You must specify use-uefi for esp-size to have effect')
if self.settings['arch'] in arch_table and\
arch_table[self.settings['arch']]['exclusive'] and\
(not self.settings['use-uefi'] and not self.settings['squash']):
raise cliapp.AppException(
'Only UEFI is supported on %s' % self.settings['arch'])
elif self.settings['use-uefi'] and self.settings['arch'] not in arch_table:
raise cliapp.AppException(
'%s is not a supported UEFI architecture' % self.settings['arch'])
if self.settings['use-uefi'] and (
self.settings['bootsize'] or
self.settings['bootoffset']):
raise cliapp.AppException(
'A separate boot partition is not supported with UEFI')
if self.settings['use-uefi'] and not self.settings['grub']:
raise cliapp.AppException(
'UEFI without Grub is not supported.')
# wheezy (which became oldstable on 04/25/2015) only had amd64 uefi
if oldstable:
if self.settings['arch'] != 'amd64' and self.settings['use-uefi']:
raise cliapp.AppException(
'Only amd64 supports UEFI in Wheezy')
def efi_packages(self):
packages = []
if not self.settings['use-uefi'] or\
self.settings['arch'] not in arch_table:
return packages
pkg = arch_table[self.settings['arch']]['package']
self.message("Adding %s to debootstrap" % pkg)
packages.append(pkg)
extra = arch_table[self.settings['arch']]['extra']
if extra and isinstance(extra, str):
bin_pkg = arch_table[str(extra)]['bin_package']
self.message("Adding support for %s using %s" % (extra, bin_pkg))
packages.append(bin_pkg)
return packages
def copy_efi_binary(self, efi_removable, efi_install):
if self.settings['arch'] not in arch_table:
return
logging.debug("using bootdir=%s", self.bootdir)
if efi_removable.startswith('/'):
efi_removable = efi_removable[1:]
if efi_install.startswith('/'):
efi_install = efi_install[1:]
efi_output = os.path.join(self.bootdir, efi_removable)
efi_input = os.path.join(self.bootdir, efi_install)
logging.debug("moving %s to %s", efi_output, efi_input)
if not os.path.exists(efi_input):
logging.warning("%s does not exist (%s)", efi_input, efi_install)
raise cliapp.AppException("Missing %s" % efi_input)
if not os.path.exists(os.path.dirname(efi_output)):
os.makedirs(os.path.dirname(efi_output))
logging.debug(
'Moving UEFI support: %s -> %s', efi_input, efi_output)
if os.path.exists(efi_output):
os.unlink(efi_output)
os.rename(efi_input, efi_output)
def configure_efi(self, rootdir):
"""
Copy the bootloader file from the package into the location
so needs to be after grub and kernel already installed.
"""
if self.settings['arch'] not in arch_table:
return
self.message('Configuring EFI')
mount_wrapper(rootdir)
efi_removable = str(arch_table[self.settings['arch']]['removable'])
efi_install = str(arch_table[self.settings['arch']]['install'])
self.message('Installing UEFI support binary')
logging.debug("moving %s to %s", efi_removable, efi_install)
try:
self.copy_efi_binary(efi_removable, efi_install)
finally:
umount_wrapper(rootdir)
def configure_extra_efi(self, rootdir):
if self.settings['arch'] not in arch_table:
return
extra = arch_table[self.settings['arch']]['extra']
if extra:
mount_wrapper(rootdir)
efi_removable = str(arch_table[extra]['removable'])
efi_install = str(arch_table[extra]['install'])
self.message('Copying UEFI support binary for %s' % extra)
try:
self.copy_efi_binary(efi_removable, efi_install)
finally:
umount_wrapper(rootdir)
def partition_esp(self):
if not self.settings['use-uefi']:
return
espsize = self.settings['esp-size'] / (1024 * 1024)
self.message("Using ESP size: %smib %s bytes" % (espsize, self.settings['esp-size']))
runcmd(['parted', '-s', self.settings['image'],
'mkpart', 'primary', 'fat32',
'1', str(espsize)])
runcmd(['parted', '-s', self.settings['image'],
'set', '1', 'boot', 'on'])
runcmd(['parted', '-s', self.settings['image'],
'set', '1', 'esp', 'on'])
def prepare_esp(self, rootdir, bootdev):
self.bootdir = '%s/%s/%s' % (rootdir, 'boot', 'efi')
logging.debug("bootdir:%s", self.bootdir)
self.mkfs(bootdev, fstype='vfat')
os.makedirs(self.bootdir)
return self.bootdir
def make_root(self, extent):
bootsize = self.settings['esp-size'] / (1024 * 1024) + 1
runcmd(['parted', '-s', self.settings['image'],
'mkpart', 'primary', str(bootsize), extent])
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