# 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 # import logging import os from wic import WicError from wic.engine import get_custom_config from wic.utils import runner from wic.pluginbase import SourcePlugin from wic.utils.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 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. """ 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) rcode = runner.show(['dd', 'if=%s' % mbrfile, 'of=%s' % full_path, 'conv=notrunc']) if rcode != 0: raise WicError("Unable to set MBR to %s" % full_path) @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. """ def _has_syslinux(dirname): if dirname: syslinux = "%s/syslinux" % dirname if os.path.exists(syslinux): return True return False if not _has_syslinux(bootimg_dir): bootimg_dir = get_bitbake_var("STAGING_DATADIR", "wic-tools") if not bootimg_dir: raise WicError("Couldn't find STAGING_DATADIR, exiting") if not _has_syslinux(bootimg_dir): raise WicError("Please build syslinux first") # just so the result notes display it creator.bootimg_dir = bootimg_dir 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.img" % cr_workdir dosfs_cmd = "mkdosfs -n boot -S 512 -C %s %d" % (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