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# ex:ts=4:sw=4:sts=4:et
# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
#
# Copyright (c) 2014, Intel Corporation.
# All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# 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.
#
# DESCRIPTION
# This implements the 'bootimg-pcbios' source plugin class for 'wic'
#
# AUTHORS
# Tom Zanussi <tom.zanussi (at] linux.intel.com>
#
import logging
import os
import re
from wic import WicError
from wic.engine import get_custom_config
from wic.pluginbase import SourcePlugin
from wic.misc import (exec_cmd, exec_native_cmd,
get_bitbake_var, BOOTDD_EXTRA_SPACE)
logger = logging.getLogger('wic')
class BootimgPcbiosPlugin(SourcePlugin):
"""
Create MBR boot partition and install syslinux on it.
"""
name = 'bootimg-pcbios'
@classmethod
def _get_bootimg_dir(cls, bootimg_dir, dirname):
"""
Check if dirname exists in default bootimg_dir or in STAGING_DIR.
"""
staging_datadir = get_bitbake_var("STAGING_DATADIR")
for result in (bootimg_dir, staging_datadir):
if os.path.exists("%s/%s" % (result, dirname)):
return result
# STAGING_DATADIR is expanded with MLPREFIX if multilib is enabled
# but dependency syslinux is still populated to original STAGING_DATADIR
nonarch_datadir = re.sub('/[^/]*recipe-sysroot', '/recipe-sysroot', staging_datadir)
if os.path.exists(os.path.join(nonarch_datadir, dirname)):
return nonarch_datadir
raise WicError("Couldn't find correct bootimg_dir, exiting")
@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 install the MBR.
"""
bootimg_dir = cls._get_bootimg_dir(bootimg_dir, 'syslinux')
mbrfile = "%s/syslinux/" % bootimg_dir
if creator.ptable_format == 'msdos':
mbrfile += "mbr.bin"
elif creator.ptable_format == 'gpt':
mbrfile += "gptmbr.bin"
else:
raise WicError("Unsupported partition table: %s" %
creator.ptable_format)
if not os.path.exists(mbrfile):
raise WicError("Couldn't find %s. If using the -e option, do you "
"have the right MACHINE set in local.conf? If not, "
"is the bootimg_dir path correct?" % mbrfile)
full_path = creator._full_path(workdir, disk_name, "direct")
logger.debug("Installing MBR on disk %s as %s with size %s bytes",
disk_name, full_path, disk.min_size)
dd_cmd = "dd if=%s of=%s conv=notrunc" % (mbrfile, full_path)
exec_cmd(dd_cmd, native_sysroot)
@classmethod
def do_configure_partition(cls, part, source_params, creator, cr_workdir,
oe_builddir, bootimg_dir, kernel_dir,
native_sysroot):
"""
Called before do_prepare_partition(), creates syslinux config
"""
hdddir = "%s/hdd/boot" % cr_workdir
install_cmd = "install -d %s" % hdddir
exec_cmd(install_cmd)
bootloader = creator.ks.bootloader
custom_cfg = None
if bootloader.configfile:
custom_cfg = get_custom_config(bootloader.configfile)
if custom_cfg:
# Use a custom configuration for grub
syslinux_conf = custom_cfg
logger.debug("Using custom configuration file %s "
"for syslinux.cfg", bootloader.configfile)
else:
raise WicError("configfile is specified but failed to "
"get it from %s." % bootloader.configfile)
if not custom_cfg:
# Create syslinux configuration using parameters from wks file
splash = os.path.join(cr_workdir, "/hdd/boot/splash.jpg")
if os.path.exists(splash):
splashline = "menu background splash.jpg"
else:
splashline = ""
syslinux_conf = ""
syslinux_conf += "PROMPT 0\n"
syslinux_conf += "TIMEOUT " + str(bootloader.timeout) + "\n"
syslinux_conf += "\n"
syslinux_conf += "ALLOWOPTIONS 1\n"
syslinux_conf += "SERIAL 0 115200\n"
syslinux_conf += "\n"
if splashline:
syslinux_conf += "%s\n" % splashline
syslinux_conf += "DEFAULT boot\n"
syslinux_conf += "LABEL boot\n"
kernel = "/vmlinuz"
syslinux_conf += "KERNEL " + kernel + "\n"
syslinux_conf += "APPEND label=boot root=%s %s\n" % \
(creator.rootdev, bootloader.append)
logger.debug("Writing syslinux config %s/hdd/boot/syslinux.cfg",
cr_workdir)
cfg = open("%s/hdd/boot/syslinux.cfg" % cr_workdir, "w")
cfg.write(syslinux_conf)
cfg.close()
@classmethod
def do_prepare_partition(cls, part, source_params, creator, cr_workdir,
oe_builddir, bootimg_dir, kernel_dir,
rootfs_dir, native_sysroot):
"""
Called to do the actual content population for a partition i.e. it
'prepares' the partition to be incorporated into the image.
In this case, prepare content for legacy bios boot partition.
"""
bootimg_dir = cls._get_bootimg_dir(bootimg_dir, 'syslinux')
staging_kernel_dir = kernel_dir
hdddir = "%s/hdd/boot" % cr_workdir
cmds = ("install -m 0644 %s/bzImage %s/vmlinuz" %
(staging_kernel_dir, hdddir),
"install -m 444 %s/syslinux/ldlinux.sys %s/ldlinux.sys" %
(bootimg_dir, hdddir),
"install -m 0644 %s/syslinux/vesamenu.c32 %s/vesamenu.c32" %
(bootimg_dir, hdddir),
"install -m 444 %s/syslinux/libcom32.c32 %s/libcom32.c32" %
(bootimg_dir, hdddir),
"install -m 444 %s/syslinux/libutil.c32 %s/libutil.c32" %
(bootimg_dir, hdddir))
for install_cmd in cmds:
exec_cmd(install_cmd)
du_cmd = "du -bks %s" % hdddir
out = exec_cmd(du_cmd)
blocks = int(out.split()[0])
extra_blocks = part.get_extra_block_count(blocks)
if extra_blocks < BOOTDD_EXTRA_SPACE:
extra_blocks = BOOTDD_EXTRA_SPACE
blocks += extra_blocks
logger.debug("Added %d extra blocks to %s to get to %d total blocks",
extra_blocks, part.mountpoint, blocks)
# dosfs image, created by mkdosfs
bootimg = "%s/boot%s.img" % (cr_workdir, part.lineno)
dosfs_cmd = "mkdosfs -n boot -i %s -S 512 -C %s %d" % \
(part.fsuuid, bootimg, blocks)
exec_native_cmd(dosfs_cmd, native_sysroot)
mcopy_cmd = "mcopy -i %s -s %s/* ::/" % (bootimg, hdddir)
exec_native_cmd(mcopy_cmd, native_sysroot)
syslinux_cmd = "syslinux %s" % bootimg
exec_native_cmd(syslinux_cmd, native_sysroot)
chmod_cmd = "chmod 644 %s" % bootimg
exec_cmd(chmod_cmd)
du_cmd = "du -Lbks %s" % bootimg
out = exec_cmd(du_cmd)
bootimg_size = out.split()[0]
part.size = int(bootimg_size)
part.source_file = bootimg
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