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qubes-installer-qubes-os/livecd-creator-qubes
Marek Marczykowski-Górecki 0493bb717c liveusb: EFI support 
Since livecd-tools doesn't support starting Xen in EFI mode, most of its
EFI support is rewritten here (overriden in LiveEFIImageCreator, based
on imgcreate.LiveImageCreator).

This all is still temporary solution, until Xen will have mutiboot2+EFI
support - then almost standard configuration could be used (almost the
same grub config as for legacy boot). So keep the changes here, and when
the proper solution would be implemented, pursue to having it upstream.

QubesOS/qubes-issues#794
2015-09-26 22:36:03 +02:00

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#!/usr/bin/python -tt
#
# livecd-creator : Creates Live CD based for Fedora.
#
# Copyright 2007, Red Hat Inc.
#
# 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; version 2 of the License.
#
# 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 Library 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
import os
import os.path
import glob
import shutil
import stat
import subprocess
import sys
import time
import optparse
import logging
import imgcreate
from imgcreate.fs import makedirs
class Usage(Exception):
def __init__(self, msg = None, no_error = False):
Exception.__init__(self, msg, no_error)
class LiveEFIImageCreator(imgcreate.LiveImageCreator):
def _get_mkisofs_options(self, isodir):
options = [ "-b", "isolinux/isolinux.bin",
"-c", "isolinux/boot.cat",
"-no-emul-boot", "-boot-info-table",
"-boot-load-size", "4" ]
if os.path.exists(isodir + "/isolinux/efiboot.img"):
options.extend([ "-eltorito-alt-boot",
"-e", "isolinux/efiboot.img",
"-no-emul-boot"])
if os.path.exists(isodir + "/isolinux/macboot.img"):
options.extend([ "-eltorito-alt-boot",
"-e", "isolinux/macboot.img",
"-no-emul-boot"])
return options
def __copy_efi_files(self, isodir):
""" Copy the efi files into /EFI/BOOT/
If any of them are missing, return False.
requires:
xen.efi
gcdx64.efi
vmlinuz
initrd
"""
fail = False
missing = []
# XXX: when adding multiple kernel support, vmlinuz and initrd needs to
# be suffixed with index
files = [("/boot/efi/EFI/*/shim.efi", "/EFI/BOOT/BOOT%s.efi" % (self.efiarch,)),
("/boot/efi/EFI/*/gcd*.efi", "/EFI/BOOT/grubx64.efi"),
("/boot/efi/EFI/*/xen-*.efi", "/EFI/BOOT/xen.efi"),
("/boot/efi/EFI/*/vmlinuz", "/EFI/BOOT/vmlinuz"),
("/boot/efi/EFI/*/initrd-small.img", "/EFI/BOOT/initrd"),
("/boot/efi/EFI/*/fonts/unicode.pf2", "/EFI/BOOT/fonts/"),
]
makedirs(isodir+"/EFI/BOOT/fonts/")
for src, dest in files:
src_glob = glob.glob(self._instroot+src)
if not src_glob:
missing.append("Missing EFI file (%s)" % (src,))
fail = True
else:
shutil.copy(src_glob[0], isodir+dest)
map(logging.error, missing)
return fail
def __get_xen_efi_image_stanza(self, **args):
if self._isDracut:
args["rootlabel"] = "live:LABEL=%(fslabel)s" % args
else:
args["rootlabel"] = "CDLABEL=%(fslabel)s" % args
return """[%(name)s%(index)s]
kernel=vmlinuz%(index)s root=%(rootlabel)s %(liveargs)s %(extra)s
ramdisk=initrd%(index)s
""" %args
def __get_efi_image_stanza(self, **args):
return """menuentry '%(long)s' --class qubes --class gnu-linux --class gnu --class os {
chainloader /efi/boot/xen.efi placeholder %(name)s%(index)s
}
""" %args
def __get_efi_image_stanzas(self, isodir, name):
# FIXME: this only supports one kernel right now...
kernel_options = self._get_kernel_options()
checkisomd5 = self._has_checkisomd5()
cfg = ""
for index in range(0, 9):
# only one supported anyway, so simply drop the suffix
index = ""
cfg += self.__get_efi_image_stanza(long = "Start " + self.product,
index = index, name = "normal")
if checkisomd5:
cfg += self.__get_efi_image_stanza(
long = "Test this media & start " + self.product,
index = index, name = "check")
cfg += """
submenu 'Troubleshooting -->' {
"""
cfg += self.__get_efi_image_stanza(long = "Start " + self.product + " in basic graphics mode",
index = index, name = "basicvideo")
cfg+= """}
"""
break
return cfg
def __get_xen_efi_image_stanzas(self, isodir, name):
# FIXME: this only supports one kernel right now...
kernel_options = self._get_kernel_options()
checkisomd5 = self._has_checkisomd5()
cfg = ""
for index in range(0, 9):
# only one supported anyway, so simply drop the suffix
index = ""
cfg += self.__get_xen_efi_image_stanza(fslabel = self.fslabel,
liveargs = kernel_options,
long = "Start " + self.product,
extra = "", index = index,
name = "normal")
if checkisomd5:
cfg += self.__get_xen_efi_image_stanza(fslabel = self.fslabel,
liveargs = kernel_options,
long = "Test this media & start " + self.product,
extra = "rd.live.check",
index = index, name = "check")
cfg += self.__get_xen_efi_image_stanza(fslabel = self.fslabel,
liveargs = kernel_options,
long = "Start " + self.product + " in basic graphics mode",
extra = "nomodeset", index = index,
name = "basicvideo")
break
return cfg
def __get_basic_xen_efi_config(self):
return """
[global]
default=normal
"""
def __get_basic_efi_config(self, **args):
return """
set default="0"
function load_video {
insmod efi_gop
insmod efi_uga
insmod video_bochs
insmod video_cirrus
insmod all_video
}
load_video
set gfxpayload=keep
insmod gzio
insmod part_gpt
insmod ext2
set timeout=%(timeout)d
### END /etc/grub.d/00_header ###
# do not use 'search' - root should be already set based on grub.efi location
### BEGIN /etc/grub.d/10_linux ###
""" %args
def _configure_efi_bootloader(self, isodir):
"""Set up the configuration for an EFI bootloader"""
if self.__copy_efi_files(isodir):
shutil.rmtree(isodir + "/EFI")
logging.warn("Failed to copy EFI files, no EFI Support will be included.")
return
cfg = self.__get_basic_efi_config(isolabel = self.fslabel,
timeout = self._timeout)
cfg += self.__get_efi_image_stanzas(isodir, self.name)
xen_cfg = self.__get_basic_xen_efi_config()
xen_cfg += self.__get_xen_efi_image_stanzas(isodir, self.name)
cfgf = open(isodir + "/EFI/BOOT/grub.cfg", "w")
cfgf.write(cfg)
cfgf.close()
xen_cfgf = open(isodir + "/EFI/BOOT/xen.cfg", "w")
xen_cfgf.write(xen_cfg)
xen_cfgf.close()
def _generate_efiboot(self, isodir):
"""Generate EFI boot images."""
if not glob.glob(self._instroot+"/boot/efi/EFI/*/xen-*.efi"):
logging.error("Missing xen-*.efi, skipping efiboot.img creation.")
return
subprocess.call(["mkefiboot", "--label", "QUBESEFI", isodir + "/EFI/BOOT",
isodir + "/isolinux/efiboot.img"])
# FIXME: replace icon
# FIXME: this is broken for many reasons:
# - mkefiboot generates unnecessary big image (about 4 times bigger
# than required) - the bug is in mkmacboot function:
# size = estimate_size(bootdir, graft=graft) * 2
# ^^^^^^^^^^^^^^^^^^^^ already counted twice
# - mkefiboot -a assumes that the loader is grub.efi
# - it isn't clear whether xen.efi would even work on Apple
subprocess.call(["mkefiboot", "-a", isodir + "/EFI/BOOT",
isodir + "/isolinux/macboot.img", "-l", self.product,
"-n", "/usr/share/pixmaps/bootloader/fedora-media.vol",
"-i", "/usr/share/pixmaps/bootloader/fedora.icns",
"-p", self.product])
def parse_options(args):
parser = optparse.OptionParser()
imgopt = optparse.OptionGroup(parser, "Image options",
"These options define the created image.")
imgopt.add_option("-c", "--config", type="string", dest="kscfg",
help="Path or url to kickstart config file")
imgopt.add_option("-b", "--base-on", type="string", dest="base_on",
help="Add packages to an existing live CD iso9660 image.")
imgopt.add_option("-f", "--fslabel", type="string", dest="fslabel",
help="File system label (default based on config name)")
imgopt.add_option("", "--title", type="string", dest="title",
help="Title used by syslinux.cfg file"),
imgopt.add_option("", "--product", type="string", dest="product",
help="Product name used in syslinux.cfg boot stanzas and countdown"),
# Provided for img-create compatibility
imgopt.add_option("-n", "--name", type="string", dest="fslabel",
help=optparse.SUPPRESS_HELP)
imgopt.add_option("-p", "--plugins", action="store_true", dest="plugins",
help="Use yum plugins during image creation",
default=False)
imgopt.add_option("", "--image-type", type="string", dest="image_type",
help=optparse.SUPPRESS_HELP)
imgopt.add_option("", "--compression-type", type="string", dest="compress_type",
help="Compression type recognized by mksquashfs "
"(default xz needs a 2.6.38+ kernel, gzip works "
"with all kernels, lzo needs a 2.6.36+ kernel, lzma "
"needs custom kernel.) Set to 'None' to force read "
"from base_on.",
default="xz")
imgopt.add_option("", "--releasever", type="string", dest="releasever",
default=None,
help="Value to substitute for $releasever in kickstart repo urls")
parser.add_option_group(imgopt)
# options related to the config of your system
sysopt = optparse.OptionGroup(parser, "System directory options",
"These options define directories used on your system for creating the live image")
sysopt.add_option("-t", "--tmpdir", type="string",
dest="tmpdir", default="/var/tmp",
help="Temporary directory to use (default: /var/tmp)")
sysopt.add_option("", "--cache", type="string",
dest="cachedir", default=None,
help="Cache directory to use (default: private cache")
sysopt.add_option("", "--cacheonly", action="store_true",
dest="cacheonly", default=False,
help="Work offline from cache, use together with --cache (default: False)")
sysopt.add_option("", "--nocleanup", action="store_true",
dest="nocleanup", default=False,
help="Skip cleanup of temporary files")
parser.add_option_group(sysopt)
imgcreate.setup_logging(parser)
# debug options not recommended for "production" images
# Start a shell in the chroot for post-configuration.
parser.add_option("-l", "--shell", action="store_true", dest="give_shell",
help=optparse.SUPPRESS_HELP)
# Don't compress the image.
parser.add_option("-s", "--skip-compression", action="store_true", dest="skip_compression",
help=optparse.SUPPRESS_HELP)
parser.add_option("", "--skip-minimize", action="store_true", dest="skip_minimize",
help=optparse.SUPPRESS_HELP)
(options, args) = parser.parse_args()
# Pretend to be a image-creator if called with that name
if not options.image_type:
if sys.argv[0].endswith('image-creator'):
options.image_type = 'image'
else:
options.image_type = 'livecd'
if options.image_type not in ('livecd', 'image'):
raise Usage("'%s' is not a recognized image type" % options.image_type)
# image-create compatibility: Last argument is kickstart file
if len(args) == 1:
options.kscfg = args.pop()
if len(args):
raise Usage("Extra arguments given")
if not options.kscfg or not os.path.exists(options.kscfg):
raise Usage("Kickstart file must be provided")
if options.base_on and not os.path.isfile(options.base_on):
raise Usage("Image file '%s' does not exist" %(options.base_on,))
if options.image_type == 'livecd':
if options.fslabel and len(options.fslabel) > imgcreate.FSLABEL_MAXLEN:
raise Usage("CD labels are limited to 32 characters")
if options.fslabel and options.fslabel.find(" ") != -1:
raise Usage("CD labels cannot contain spaces.")
return options
def main():
try:
options = parse_options(sys.argv[1:])
except Usage, (msg, no_error):
if no_error:
out = sys.stdout
ret = 0
else:
out = sys.stderr
ret = 2
if msg:
print >> out, msg
return ret
if os.geteuid () != 0:
print >> sys.stderr, "You must run %s as root" % sys.argv[0]
return 1
if options.fslabel:
fslabel = options.fslabel
name = fslabel
else:
name = imgcreate.build_name(options.kscfg, options.image_type + "-")
fslabel = imgcreate.build_name(options.kscfg,
options.image_type + "-",
maxlen = imgcreate.FSLABEL_MAXLEN,
suffix = "%s-%s" %(os.uname()[4], time.strftime("%Y%m%d%H%M")))
logging.info("Using label '%s' and name '%s'" % (fslabel, name))
if options.title:
title = options.title
else:
try:
title = " ".join(name.split("-")[:2])
title = title.title()
except:
title = "Linux"
if options.product:
product = options.product
else:
try:
product = " ".join(name.split("-")[:2])
product = product.title()
except:
product = "Linux"
logging.info("Using title '%s' and product '%s'" % (title, product))
ks = imgcreate.read_kickstart(options.kscfg)
if not ks.handler.repo.seen:
print >> sys.stderr, "Kickstart (%s) must have at least one repository." % (options.kscfg)
return 1
try:
if options.image_type == 'livecd':
creator = LiveEFIImageCreator(ks, name,
fslabel=fslabel,
releasever=options.releasever,
tmpdir=os.path.abspath(options.tmpdir),
useplugins=options.plugins,
title=title, product=product,
cacheonly=options.cacheonly,
docleanup=not options.nocleanup)
elif options.image_type == 'image':
creator = imgcreate.LoopImageCreator(ks, name,
fslabel=fslabel,
releasever=options.releasever,
useplugins=options.plugins,
tmpdir=os.path.abspath(options.tmpdir),
cacheonly=options.cacheonly,
docleanup=not options.nocleanup)
except imgcreate.CreatorError as e:
logging.error(u"%s creation failed: %s", options.image_type, e)
return 1
creator.compress_type = options.compress_type
creator.skip_compression = options.skip_compression
creator.skip_minimize = options.skip_minimize
if options.cachedir:
options.cachedir = os.path.abspath(options.cachedir)
try:
creator.mount(options.base_on, options.cachedir)
# fix /dev
os.mknod(os.path.join(
creator._instroot, 'dev/loop-control'), 0666 | stat.S_IFBLK, os.makedev(10, 237))
for i in range(8):
os.mknod(os.path.join(creator._instroot, 'dev/loop{}'.format(i)),
0666 | stat.S_IFBLK, os.makedev(7, i))
creator.install()
creator.configure()
if options.give_shell:
print "Launching shell. Exit to continue."
print "----------------------------------"
creator.launch_shell()
creator.unmount()
creator.package()
except imgcreate.CreatorError, e:
logging.error(u"Error creating Live CD : %s" % e)
return 1
finally:
creator.cleanup()
return 0
if __name__ == "__main__":
sys.exit(main())
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