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# Copyright (C) 2004, Advanced Micro Devices, Inc. All Rights Reserved
# Released under the MIT license (see packages/COPYING)
# Creates a bootable image using syslinux, your kernel and an optional
# initrd
#
# End result is two things:
#
# 1. A .hddimg file which is an msdos filesystem containing syslinux, a kernel,
# an initrd and a rootfs image. These can be written to harddisks directly and
# also booted on USB flash disks (write them there with dd).
#
# 2. A CD .iso image
# Boot process is that the initrd will boot and process which label was selected
# in syslinux. Actions based on the label are then performed (e.g. installing to
# an hdd)
# External variables (also used by syslinux.bbclass)
# ${INITRD} - indicates a list of filesystem images to concatenate and use as an initrd (optional)
# ${HDDIMG_ID} - FAT image volume-id
# ${ROOTFS} - indicates a filesystem image to include as the root filesystem (optional)
inherit live-vm-common
do_bootimg[depends] += "dosfstools-native:do_populate_sysroot \
mtools-native:do_populate_sysroot \
cdrtools-native:do_populate_sysroot \
virtual/kernel:do_deploy \
${MLPREFIX}syslinux:do_populate_sysroot \
syslinux-native:do_populate_sysroot \
${PN}:do_image_${@d.getVar('LIVE_ROOTFS_TYPE').replace('-', '_')} \
"
LABELS_LIVE ?= "boot install"
ROOT_LIVE ?= "root=/dev/ram0"
INITRD_IMAGE_LIVE ?= "${MLPREFIX}core-image-minimal-initramfs"
INITRD_LIVE ?= "${DEPLOY_DIR_IMAGE}/${INITRD_IMAGE_LIVE}-${MACHINE}.cpio.gz"
LIVE_ROOTFS_TYPE ?= "ext4"
ROOTFS ?= "${IMGDEPLOYDIR}/${IMAGE_LINK_NAME}.${LIVE_ROOTFS_TYPE}"
IMAGE_TYPEDEP_live = "${LIVE_ROOTFS_TYPE}"
IMAGE_TYPEDEP_iso = "${LIVE_ROOTFS_TYPE}"
IMAGE_TYPEDEP_hddimg = "${LIVE_ROOTFS_TYPE}"
IMAGE_TYPES_MASKED += "live hddimg iso"
python() {
image_b = d.getVar('IMAGE_BASENAME')
initrd_i = d.getVar('INITRD_IMAGE_LIVE')
if image_b == initrd_i:
bb.error('INITRD_IMAGE_LIVE %s cannot use image live, hddimg or iso.' % initrd_i)
bb.fatal('Check IMAGE_FSTYPES and INITRAMFS_FSTYPES settings.')
elif initrd_i:
d.appendVarFlag('do_bootimg', 'depends', ' %s:do_image_complete' % initrd_i)
}
HDDDIR = "${S}/hddimg"
ISODIR = "${S}/iso"
EFIIMGDIR = "${S}/efi_img"
COMPACT_ISODIR = "${S}/iso.z"
ISOLINUXDIR ?= "/isolinux"
ISO_BOOTIMG = "isolinux/isolinux.bin"
ISO_BOOTCAT = "isolinux/boot.cat"
MKISOFS_OPTIONS = "-no-emul-boot -boot-load-size 4 -boot-info-table"
BOOTIMG_VOLUME_ID ?= "boot"
BOOTIMG_EXTRA_SPACE ?= "512"
populate_live() {
populate_kernel $1
if [ -s "${ROOTFS}" ]; then
install -m 0644 ${ROOTFS} $1/rootfs.img
fi
}
build_iso() {
# Only create an ISO if we have an INITRD and the live or iso image type was selected
if [ -z "${INITRD}" ] || [ "${@bb.utils.contains_any('IMAGE_FSTYPES', 'live iso', '1', '0', d)}" != "1" ]; then
bbnote "ISO image will not be created."
return
fi
# ${INITRD} is a list of multiple filesystem images
for fs in ${INITRD}
do
if [ ! -s "$fs" ]; then
bbwarn "ISO image will not be created. $fs is invalid."
return
fi
done
populate_live ${ISODIR}
if [ "${PCBIOS}" = "1" ]; then
syslinux_iso_populate ${ISODIR}
fi
if [ "${EFI}" = "1" ]; then
efi_iso_populate ${ISODIR}
build_fat_img ${EFIIMGDIR} ${ISODIR}/efi.img
fi
# EFI only
if [ "${PCBIOS}" != "1" ] && [ "${EFI}" = "1" ] ; then
# Work around bug in isohybrid where it requires isolinux.bin
# In the boot catalog, even though it is not used
mkdir -p ${ISODIR}/${ISOLINUXDIR}
install -m 0644 ${STAGING_DATADIR}/syslinux/isolinux.bin ${ISODIR}${ISOLINUXDIR}
fi
# We used to have support for zisofs; this is a relic of that
mkisofs_compress_opts="-r"
# Check the size of ${ISODIR}/rootfs.img, use mkisofs -iso-level 3
# when it exceeds 3.8GB, the specification is 4G - 1 bytes, we need
# leave a few space for other files.
mkisofs_iso_level=""
if [ -n "${ROOTFS}" ] && [ -s "${ROOTFS}" ]; then
rootfs_img_size=`stat -c '%s' ${ISODIR}/rootfs.img`
# 4080218931 = 3.8 * 1024 * 1024 * 1024
if [ $rootfs_img_size -gt 4080218931 ]; then
bbnote "${ISODIR}/rootfs.img execeeds 3.8GB, using '-iso-level 3' for mkisofs"
mkisofs_iso_level="-iso-level 3"
fi
fi
if [ "${PCBIOS}" = "1" ] && [ "${EFI}" != "1" ] ; then
# PCBIOS only media
mkisofs -V ${BOOTIMG_VOLUME_ID} \
-o ${IMGDEPLOYDIR}/${IMAGE_NAME}.iso \
-b ${ISO_BOOTIMG} -c ${ISO_BOOTCAT} \
$mkisofs_compress_opts \
${MKISOFS_OPTIONS} $mkisofs_iso_level ${ISODIR}
else
# EFI only OR EFI+PCBIOS
mkisofs -A ${BOOTIMG_VOLUME_ID} -V ${BOOTIMG_VOLUME_ID} \
-o ${IMGDEPLOYDIR}/${IMAGE_NAME}.iso \
-b ${ISO_BOOTIMG} -c ${ISO_BOOTCAT} \
$mkisofs_compress_opts ${MKISOFS_OPTIONS} $mkisofs_iso_level \
-eltorito-alt-boot -eltorito-platform efi \
-b efi.img -no-emul-boot \
${ISODIR}
isohybrid_args="-u"
fi
isohybrid $isohybrid_args ${IMGDEPLOYDIR}/${IMAGE_NAME}.iso
}
build_fat_img() {
FATSOURCEDIR=$1
FATIMG=$2
# Calculate the size required for the final image including the
# data and filesystem overhead.
# Sectors: 512 bytes
# Blocks: 1024 bytes
# Determine the sector count just for the data
SECTORS=$(expr $(du --apparent-size -ks ${FATSOURCEDIR} | cut -f 1) \* 2)
# Account for the filesystem overhead. This includes directory
# entries in the clusters as well as the FAT itself.
# Assumptions:
# FAT32 (12 or 16 may be selected by mkdosfs, but the extra
# padding will be minimal on those smaller images and not
# worth the logic here to caclulate the smaller FAT sizes)
# < 16 entries per directory
# 8.3 filenames only
# 32 bytes per dir entry
DIR_BYTES=$(expr $(find ${FATSOURCEDIR} | tail -n +2 | wc -l) \* 32)
# 32 bytes for every end-of-directory dir entry
DIR_BYTES=$(expr $DIR_BYTES + $(expr $(find ${FATSOURCEDIR} -type d | tail -n +2 | wc -l) \* 32))
# 4 bytes per FAT entry per sector of data
FAT_BYTES=$(expr $SECTORS \* 4)
# 4 bytes per FAT entry per end-of-cluster list
FAT_BYTES=$(expr $FAT_BYTES + $(expr $(find ${FATSOURCEDIR} -type d | tail -n +2 | wc -l) \* 4))
# Use a ceiling function to determine FS overhead in sectors
DIR_SECTORS=$(expr $(expr $DIR_BYTES + 511) / 512)
# There are two FATs on the image
FAT_SECTORS=$(expr $(expr $(expr $FAT_BYTES + 511) / 512) \* 2)
SECTORS=$(expr $SECTORS + $(expr $DIR_SECTORS + $FAT_SECTORS))
# Determine the final size in blocks accounting for some padding
BLOCKS=$(expr $(expr $SECTORS / 2) + ${BOOTIMG_EXTRA_SPACE})
# mkdosfs will sometimes use FAT16 when it is not appropriate,
# resulting in a boot failure from SYSLINUX. Use FAT32 for
# images larger than 512MB, otherwise let mkdosfs decide.
if [ $(expr $BLOCKS / 1024) -gt 512 ]; then
FATSIZE="-F 32"
fi
# mkdosfs will fail if ${FATIMG} exists. Since we are creating an
# new image, it is safe to delete any previous image.
if [ -e ${FATIMG} ]; then
rm ${FATIMG}
fi
if [ -z "${HDDIMG_ID}" ]; then
mkdosfs ${FATSIZE} -n ${BOOTIMG_VOLUME_ID} ${MKDOSFS_EXTRAOPTS} -C ${FATIMG} \
${BLOCKS}
else
mkdosfs ${FATSIZE} -n ${BOOTIMG_VOLUME_ID} ${MKDOSFS_EXTRAOPTS} -C ${FATIMG} \
${BLOCKS} -i ${HDDIMG_ID}
fi
# Copy FATSOURCEDIR recursively into the image file directly
mcopy -i ${FATIMG} -s ${FATSOURCEDIR}/* ::/
}
build_hddimg() {
# Create an HDD image
if [ "${@bb.utils.contains_any('IMAGE_FSTYPES', 'live hddimg', '1', '0', d)}" = "1" ] ; then
populate_live ${HDDDIR}
if [ "${PCBIOS}" = "1" ]; then
syslinux_hddimg_populate ${HDDDIR}
fi
if [ "${EFI}" = "1" ]; then
efi_hddimg_populate ${HDDDIR}
fi
# Check the size of ${HDDDIR}/rootfs.img, error out if it
# exceeds 4GB, it is the single file's max size of FAT fs.
if [ -f ${HDDDIR}/rootfs.img ]; then
rootfs_img_size=`stat -c '%s' ${HDDDIR}/rootfs.img`
max_size=`expr 4 \* 1024 \* 1024 \* 1024`
if [ $rootfs_img_size -ge $max_size ]; then
bberror "${HDDDIR}/rootfs.img rootfs size is greather than or equal to 4GB,"
bberror "and this doesn't work on a FAT filesystem. You can either:"
bberror "1) Reduce the size of rootfs.img, or,"
bbfatal "2) Use wic, vmdk or vdi instead of hddimg\n"
fi
fi
build_fat_img ${HDDDIR} ${IMGDEPLOYDIR}/${IMAGE_NAME}.hddimg
if [ "${PCBIOS}" = "1" ]; then
syslinux_hddimg_install
fi
chmod 644 ${IMGDEPLOYDIR}/${IMAGE_NAME}.hddimg
fi
}
python do_bootimg() {
set_live_vm_vars(d, 'LIVE')
if d.getVar("PCBIOS") == "1":
bb.build.exec_func('build_syslinux_cfg', d)
if d.getVar("EFI") == "1":
bb.build.exec_func('build_efi_cfg', d)
bb.build.exec_func('build_hddimg', d)
bb.build.exec_func('build_iso', d)
bb.build.exec_func('create_symlinks', d)
}
do_bootimg[subimages] = "hddimg iso"
do_bootimg[imgsuffix] = "."
addtask bootimg before do_image_complete
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