467 lines
18 KiB
Python
467 lines
18 KiB
Python
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# ex:ts=4:sw=4:sts=4:et
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# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License version 2 as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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#
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# DESCRIPTION
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# This implements the 'isoimage-isohybrid' source plugin class for 'wic'
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#
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# AUTHORS
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# Mihaly Varga <mihaly.varga (at] ni.com>
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import glob
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import logging
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import os
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import re
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import shutil
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from wic import WicError
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from wic.engine import get_custom_config
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from wic.pluginbase import SourcePlugin
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from wic.misc import exec_cmd, exec_native_cmd, get_bitbake_var
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logger = logging.getLogger('wic')
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class IsoImagePlugin(SourcePlugin):
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"""
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Create a bootable ISO image
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This plugin creates a hybrid, legacy and EFI bootable ISO image. The
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generated image can be used on optical media as well as USB media.
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Legacy boot uses syslinux and EFI boot uses grub or gummiboot (not
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implemented yet) as bootloader. The plugin creates the directories required
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by bootloaders and populates them by creating and configuring the
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bootloader files.
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Example kickstart file:
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part /boot --source isoimage-isohybrid --sourceparams="loader=grub-efi, \\
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image_name= IsoImage" --ondisk cd --label LIVECD --fstype=ext2
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bootloader --timeout=10 --append=" "
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In --sourceparams "loader" specifies the bootloader used for booting in EFI
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mode, while "image_name" specifies the name of the generated image. In the
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example above, wic creates an ISO image named IsoImage-cd.direct (default
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extension added by direct imeger plugin) and a file named IsoImage-cd.iso
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"""
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name = 'isoimage-isohybrid'
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@classmethod
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def do_configure_syslinux(cls, creator, cr_workdir):
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"""
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Create loader-specific (syslinux) config
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"""
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splash = os.path.join(cr_workdir, "ISO/boot/splash.jpg")
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if os.path.exists(splash):
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splashline = "menu background splash.jpg"
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else:
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splashline = ""
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bootloader = creator.ks.bootloader
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syslinux_conf = ""
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syslinux_conf += "PROMPT 0\n"
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syslinux_conf += "TIMEOUT %s \n" % (bootloader.timeout or 10)
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syslinux_conf += "\n"
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syslinux_conf += "ALLOWOPTIONS 1\n"
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syslinux_conf += "SERIAL 0 115200\n"
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syslinux_conf += "\n"
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if splashline:
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syslinux_conf += "%s\n" % splashline
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syslinux_conf += "DEFAULT boot\n"
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syslinux_conf += "LABEL boot\n"
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kernel = "/bzImage"
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syslinux_conf += "KERNEL " + kernel + "\n"
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syslinux_conf += "APPEND initrd=/initrd LABEL=boot %s\n" \
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% bootloader.append
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logger.debug("Writing syslinux config %s/ISO/isolinux/isolinux.cfg",
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cr_workdir)
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with open("%s/ISO/isolinux/isolinux.cfg" % cr_workdir, "w") as cfg:
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cfg.write(syslinux_conf)
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@classmethod
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def do_configure_grubefi(cls, part, creator, target_dir):
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"""
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Create loader-specific (grub-efi) config
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"""
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configfile = creator.ks.bootloader.configfile
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if configfile:
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grubefi_conf = get_custom_config(configfile)
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if grubefi_conf:
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logger.debug("Using custom configuration file %s for grub.cfg",
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configfile)
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else:
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raise WicError("configfile is specified "
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"but failed to get it from %s", configfile)
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else:
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splash = os.path.join(target_dir, "splash.jpg")
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if os.path.exists(splash):
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splashline = "menu background splash.jpg"
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else:
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splashline = ""
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bootloader = creator.ks.bootloader
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grubefi_conf = ""
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grubefi_conf += "serial --unit=0 --speed=115200 --word=8 "
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grubefi_conf += "--parity=no --stop=1\n"
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grubefi_conf += "default=boot\n"
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grubefi_conf += "timeout=%s\n" % (bootloader.timeout or 10)
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grubefi_conf += "\n"
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grubefi_conf += "search --set=root --label %s " % part.label
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grubefi_conf += "\n"
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grubefi_conf += "menuentry 'boot'{\n"
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kernel = "/bzImage"
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grubefi_conf += "linux %s rootwait %s\n" \
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% (kernel, bootloader.append)
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grubefi_conf += "initrd /initrd \n"
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grubefi_conf += "}\n"
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if splashline:
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grubefi_conf += "%s\n" % splashline
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cfg_path = os.path.join(target_dir, "grub.cfg")
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logger.debug("Writing grubefi config %s", cfg_path)
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with open(cfg_path, "w") as cfg:
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cfg.write(grubefi_conf)
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@staticmethod
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def _build_initramfs_path(rootfs_dir, cr_workdir):
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"""
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Create path for initramfs image
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"""
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initrd = get_bitbake_var("INITRD_LIVE") or get_bitbake_var("INITRD")
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if not initrd:
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initrd_dir = get_bitbake_var("DEPLOY_DIR_IMAGE")
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if not initrd_dir:
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raise WicError("Couldn't find DEPLOY_DIR_IMAGE, exiting.")
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image_name = get_bitbake_var("IMAGE_BASENAME")
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if not image_name:
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raise WicError("Couldn't find IMAGE_BASENAME, exiting.")
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image_type = get_bitbake_var("INITRAMFS_FSTYPES")
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if not image_type:
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raise WicError("Couldn't find INITRAMFS_FSTYPES, exiting.")
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machine = os.path.basename(initrd_dir)
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pattern = '%s/%s*%s.%s' % (initrd_dir, image_name, machine, image_type)
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files = glob.glob(pattern)
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if files:
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initrd = files[0]
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if not initrd or not os.path.exists(initrd):
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# Create initrd from rootfs directory
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initrd = "%s/initrd.cpio.gz" % cr_workdir
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initrd_dir = "%s/INITRD" % cr_workdir
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shutil.copytree("%s" % rootfs_dir, \
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"%s" % initrd_dir, symlinks=True)
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if os.path.isfile("%s/init" % rootfs_dir):
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shutil.copy2("%s/init" % rootfs_dir, "%s/init" % initrd_dir)
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elif os.path.lexists("%s/init" % rootfs_dir):
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os.symlink(os.readlink("%s/init" % rootfs_dir), \
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"%s/init" % initrd_dir)
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elif os.path.isfile("%s/sbin/init" % rootfs_dir):
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shutil.copy2("%s/sbin/init" % rootfs_dir, \
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"%s" % initrd_dir)
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elif os.path.lexists("%s/sbin/init" % rootfs_dir):
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os.symlink(os.readlink("%s/sbin/init" % rootfs_dir), \
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"%s/init" % initrd_dir)
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else:
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raise WicError("Couldn't find or build initrd, exiting.")
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exec_cmd("cd %s && find . | cpio -o -H newc -R +0:+0 >./initrd.cpio " \
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% initrd_dir, as_shell=True)
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exec_cmd("gzip -f -9 -c %s/initrd.cpio > %s" \
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% (cr_workdir, initrd), as_shell=True)
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shutil.rmtree(initrd_dir)
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return initrd
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@classmethod
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def do_configure_partition(cls, part, source_params, creator, cr_workdir,
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oe_builddir, bootimg_dir, kernel_dir,
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native_sysroot):
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"""
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Called before do_prepare_partition(), creates loader-specific config
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"""
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isodir = "%s/ISO/" % cr_workdir
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if os.path.exists(isodir):
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shutil.rmtree(isodir)
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install_cmd = "install -d %s " % isodir
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exec_cmd(install_cmd)
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# Overwrite the name of the created image
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logger.debug(source_params)
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if 'image_name' in source_params and \
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source_params['image_name'].strip():
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creator.name = source_params['image_name'].strip()
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logger.debug("The name of the image is: %s", creator.name)
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@classmethod
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def do_prepare_partition(cls, part, source_params, creator, cr_workdir,
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oe_builddir, bootimg_dir, kernel_dir,
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rootfs_dir, native_sysroot):
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"""
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Called to do the actual content population for a partition i.e. it
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'prepares' the partition to be incorporated into the image.
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In this case, prepare content for a bootable ISO image.
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"""
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isodir = "%s/ISO" % cr_workdir
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if part.rootfs_dir is None:
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if not 'ROOTFS_DIR' in rootfs_dir:
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raise WicError("Couldn't find --rootfs-dir, exiting.")
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rootfs_dir = rootfs_dir['ROOTFS_DIR']
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else:
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if part.rootfs_dir in rootfs_dir:
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rootfs_dir = rootfs_dir[part.rootfs_dir]
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elif part.rootfs_dir:
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rootfs_dir = part.rootfs_dir
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else:
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raise WicError("Couldn't find --rootfs-dir=%s connection "
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"or it is not a valid path, exiting." %
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part.rootfs_dir)
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if not os.path.isdir(rootfs_dir):
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rootfs_dir = get_bitbake_var("IMAGE_ROOTFS")
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if not os.path.isdir(rootfs_dir):
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raise WicError("Couldn't find IMAGE_ROOTFS, exiting.")
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part.rootfs_dir = rootfs_dir
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# Prepare rootfs.img
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deploy_dir = get_bitbake_var("DEPLOY_DIR_IMAGE")
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img_iso_dir = get_bitbake_var("ISODIR")
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rootfs_img = "%s/rootfs.img" % img_iso_dir
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if not os.path.isfile(rootfs_img):
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# check if rootfs.img is in deploydir
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deploy_dir = get_bitbake_var("DEPLOY_DIR_IMAGE")
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image_name = get_bitbake_var("IMAGE_LINK_NAME")
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rootfs_img = "%s/%s.%s" \
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% (deploy_dir, image_name, part.fstype)
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if not os.path.isfile(rootfs_img):
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# create image file with type specified by --fstype
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# which contains rootfs
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du_cmd = "du -bks %s" % rootfs_dir
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out = exec_cmd(du_cmd)
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part.size = int(out.split()[0])
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part.extra_space = 0
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part.overhead_factor = 1.2
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part.prepare_rootfs(cr_workdir, oe_builddir, rootfs_dir, \
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native_sysroot)
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rootfs_img = part.source_file
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install_cmd = "install -m 0644 %s %s/rootfs.img" \
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% (rootfs_img, isodir)
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exec_cmd(install_cmd)
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# Remove the temporary file created by part.prepare_rootfs()
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if os.path.isfile(part.source_file):
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os.remove(part.source_file)
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# Support using a different initrd other than default
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if source_params.get('initrd'):
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initrd = source_params['initrd']
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if not deploy_dir:
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raise WicError("Couldn't find DEPLOY_DIR_IMAGE, exiting")
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cp_cmd = "cp %s/%s %s" % (deploy_dir, initrd, cr_workdir)
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exec_cmd(cp_cmd)
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else:
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# Prepare initial ramdisk
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initrd = "%s/initrd" % deploy_dir
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if not os.path.isfile(initrd):
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initrd = "%s/initrd" % img_iso_dir
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if not os.path.isfile(initrd):
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initrd = cls._build_initramfs_path(rootfs_dir, cr_workdir)
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install_cmd = "install -m 0644 %s %s/initrd" % (initrd, isodir)
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exec_cmd(install_cmd)
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# Remove the temporary file created by _build_initramfs_path function
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if os.path.isfile("%s/initrd.cpio.gz" % cr_workdir):
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os.remove("%s/initrd.cpio.gz" % cr_workdir)
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# Install bzImage
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install_cmd = "install -m 0644 %s/bzImage %s/bzImage" % \
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(kernel_dir, isodir)
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exec_cmd(install_cmd)
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#Create bootloader for efi boot
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try:
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target_dir = "%s/EFI/BOOT" % isodir
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if os.path.exists(target_dir):
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shutil.rmtree(target_dir)
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os.makedirs(target_dir)
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if source_params['loader'] == 'grub-efi':
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# Builds bootx64.efi/bootia32.efi if ISODIR didn't exist or
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# didn't contains it
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target_arch = get_bitbake_var("TARGET_SYS")
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if not target_arch:
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raise WicError("Coludn't find target architecture")
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if re.match("x86_64", target_arch):
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grub_image = "grub-efi-bootx64.efi"
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elif re.match('i.86', target_arch):
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grub_image = "grub-efi-bootia32.efi"
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else:
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raise WicError("grub-efi is incompatible with target %s" %
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target_arch)
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grub_target = os.path.join(target_dir, grub_image)
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if not os.path.isfile(grub_target):
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grub_src = os.path.join(deploy_dir, grub_image)
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if not os.path.exists(grub_src):
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raise WicError("Grub loader %s is not found in %s. "
|
||
|
|
"Please build grub-efi first" % (grub_image, deploy_dir))
|
||
|
|
shutil.copy(grub_src, grub_target)
|
||
|
|
|
||
|
|
if not os.path.isfile(os.path.join(target_dir, "boot.cfg")):
|
||
|
|
cls.do_configure_grubefi(part, creator, target_dir)
|
||
|
|
|
||
|
|
else:
|
||
|
|
raise WicError("unrecognized bootimg-efi loader: %s" %
|
||
|
|
source_params['loader'])
|
||
|
|
except KeyError:
|
||
|
|
raise WicError("bootimg-efi requires a loader, none specified")
|
||
|
|
|
||
|
|
# Create efi.img that contains bootloader files for EFI booting
|
||
|
|
# if ISODIR didn't exist or didn't contains it
|
||
|
|
if os.path.isfile("%s/efi.img" % img_iso_dir):
|
||
|
|
install_cmd = "install -m 0644 %s/efi.img %s/efi.img" % \
|
||
|
|
(img_iso_dir, isodir)
|
||
|
|
exec_cmd(install_cmd)
|
||
|
|
else:
|
||
|
|
du_cmd = "du -bks %s/EFI" % isodir
|
||
|
|
out = exec_cmd(du_cmd)
|
||
|
|
blocks = int(out.split()[0])
|
||
|
|
# Add some extra space for file system overhead
|
||
|
|
blocks += 100
|
||
|
|
logger.debug("Added 100 extra blocks to %s to get to %d "
|
||
|
|
"total blocks", part.mountpoint, blocks)
|
||
|
|
|
||
|
|
# dosfs image for EFI boot
|
||
|
|
bootimg = "%s/efi.img" % isodir
|
||
|
|
|
||
|
|
dosfs_cmd = 'mkfs.vfat -n "EFIimg" -S 512 -C %s %d' \
|
||
|
|
% (bootimg, blocks)
|
||
|
|
exec_native_cmd(dosfs_cmd, native_sysroot)
|
||
|
|
|
||
|
|
mmd_cmd = "mmd -i %s ::/EFI" % bootimg
|
||
|
|
exec_native_cmd(mmd_cmd, native_sysroot)
|
||
|
|
|
||
|
|
mcopy_cmd = "mcopy -i %s -s %s/EFI/* ::/EFI/" \
|
||
|
|
% (bootimg, isodir)
|
||
|
|
exec_native_cmd(mcopy_cmd, native_sysroot)
|
||
|
|
|
||
|
|
chmod_cmd = "chmod 644 %s" % bootimg
|
||
|
|
exec_cmd(chmod_cmd)
|
||
|
|
|
||
|
|
# Prepare files for legacy boot
|
||
|
|
syslinux_dir = get_bitbake_var("STAGING_DATADIR")
|
||
|
|
if not syslinux_dir:
|
||
|
|
raise WicError("Couldn't find STAGING_DATADIR, exiting.")
|
||
|
|
|
||
|
|
if os.path.exists("%s/isolinux" % isodir):
|
||
|
|
shutil.rmtree("%s/isolinux" % isodir)
|
||
|
|
|
||
|
|
install_cmd = "install -d %s/isolinux" % isodir
|
||
|
|
exec_cmd(install_cmd)
|
||
|
|
|
||
|
|
cls.do_configure_syslinux(creator, cr_workdir)
|
||
|
|
|
||
|
|
install_cmd = "install -m 444 %s/syslinux/ldlinux.sys " % syslinux_dir
|
||
|
|
install_cmd += "%s/isolinux/ldlinux.sys" % isodir
|
||
|
|
exec_cmd(install_cmd)
|
||
|
|
|
||
|
|
install_cmd = "install -m 444 %s/syslinux/isohdpfx.bin " % syslinux_dir
|
||
|
|
install_cmd += "%s/isolinux/isohdpfx.bin" % isodir
|
||
|
|
exec_cmd(install_cmd)
|
||
|
|
|
||
|
|
install_cmd = "install -m 644 %s/syslinux/isolinux.bin " % syslinux_dir
|
||
|
|
install_cmd += "%s/isolinux/isolinux.bin" % isodir
|
||
|
|
exec_cmd(install_cmd)
|
||
|
|
|
||
|
|
install_cmd = "install -m 644 %s/syslinux/ldlinux.c32 " % syslinux_dir
|
||
|
|
install_cmd += "%s/isolinux/ldlinux.c32" % isodir
|
||
|
|
exec_cmd(install_cmd)
|
||
|
|
|
||
|
|
#create ISO image
|
||
|
|
iso_img = "%s/tempiso_img.iso" % cr_workdir
|
||
|
|
iso_bootimg = "isolinux/isolinux.bin"
|
||
|
|
iso_bootcat = "isolinux/boot.cat"
|
||
|
|
efi_img = "efi.img"
|
||
|
|
|
||
|
|
mkisofs_cmd = "mkisofs -V %s " % part.label
|
||
|
|
mkisofs_cmd += "-o %s -U " % iso_img
|
||
|
|
mkisofs_cmd += "-J -joliet-long -r -iso-level 2 -b %s " % iso_bootimg
|
||
|
|
mkisofs_cmd += "-c %s -no-emul-boot -boot-load-size 4 " % iso_bootcat
|
||
|
|
mkisofs_cmd += "-boot-info-table -eltorito-alt-boot "
|
||
|
|
mkisofs_cmd += "-eltorito-platform 0xEF -eltorito-boot %s " % efi_img
|
||
|
|
mkisofs_cmd += "-no-emul-boot %s " % isodir
|
||
|
|
|
||
|
|
logger.debug("running command: %s", mkisofs_cmd)
|
||
|
|
exec_native_cmd(mkisofs_cmd, native_sysroot)
|
||
|
|
|
||
|
|
shutil.rmtree(isodir)
|
||
|
|
|
||
|
|
du_cmd = "du -Lbks %s" % iso_img
|
||
|
|
out = exec_cmd(du_cmd)
|
||
|
|
isoimg_size = int(out.split()[0])
|
||
|
|
|
||
|
|
part.size = isoimg_size
|
||
|
|
part.source_file = iso_img
|
||
|
|
|
||
|
|
@classmethod
|
||
|
|
def do_install_disk(cls, disk, disk_name, creator, workdir, oe_builddir,
|
||
|
|
bootimg_dir, kernel_dir, native_sysroot):
|
||
|
|
"""
|
||
|
|
Called after all partitions have been prepared and assembled into a
|
||
|
|
disk image. In this case, we insert/modify the MBR using isohybrid
|
||
|
|
utility for booting via BIOS from disk storage devices.
|
||
|
|
"""
|
||
|
|
|
||
|
|
iso_img = "%s.p1" % disk.path
|
||
|
|
full_path = creator._full_path(workdir, disk_name, "direct")
|
||
|
|
full_path_iso = creator._full_path(workdir, disk_name, "iso")
|
||
|
|
|
||
|
|
isohybrid_cmd = "isohybrid -u %s" % iso_img
|
||
|
|
logger.debug("running command: %s", isohybrid_cmd)
|
||
|
|
exec_native_cmd(isohybrid_cmd, native_sysroot)
|
||
|
|
|
||
|
|
# Replace the image created by direct plugin with the one created by
|
||
|
|
# mkisofs command. This is necessary because the iso image created by
|
||
|
|
# mkisofs has a very specific MBR is system area of the ISO image, and
|
||
|
|
# direct plugin adds and configures an another MBR.
|
||
|
|
logger.debug("Replaceing the image created by direct plugin\n")
|
||
|
|
os.remove(disk.path)
|
||
|
|
shutil.copy2(iso_img, full_path_iso)
|
||
|
|
shutil.copy2(full_path_iso, full_path)
|