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