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- # image-vm.bbclass
- # (loosly based off image-live.bbclass Copyright (C) 2004, Advanced Micro Devices, Inc.)
- #
- # Create an image which can be placed directly onto a harddisk using dd and then
- # booted.
- #
- # This uses syslinux. extlinux would have been nice but required the ext2/3
- # partition to be mounted. grub requires to run itself as part of the install
- # process.
- #
- # The end result is a 512 boot sector populated with an MBR and partition table
- # followed by an msdos fat16 partition containing syslinux and a linux kernel
- # completed by the ext2/3 rootfs.
- #
- # We have to push the msdos parition table size > 16MB so fat 16 is used as parted
- # won't touch fat12 partitions.
- inherit live-vm-common
- do_bootdirectdisk[depends] += "dosfstools-native:do_populate_sysroot \
- virtual/kernel:do_deploy \
- syslinux:do_populate_sysroot \
- syslinux-native:do_populate_sysroot \
- parted-native:do_populate_sysroot \
- mtools-native:do_populate_sysroot \
- ${PN}:do_image_${VM_ROOTFS_TYPE} \
- "
- IMAGE_TYPEDEP_vmdk = "${VM_ROOTFS_TYPE}"
- IMAGE_TYPEDEP_vdi = "${VM_ROOTFS_TYPE}"
- IMAGE_TYPEDEP_qcow2 = "${VM_ROOTFS_TYPE}"
- IMAGE_TYPEDEP_hdddirect = "${VM_ROOTFS_TYPE}"
- IMAGE_TYPES_MASKED += "vmdk vdi qcow2 hdddirect"
- VM_ROOTFS_TYPE ?= "ext4"
- ROOTFS ?= "${IMGDEPLOYDIR}/${IMAGE_LINK_NAME}.${VM_ROOTFS_TYPE}"
- # Used by bootloader
- LABELS_VM ?= "boot"
- ROOT_VM ?= "root=/dev/sda2"
- # Using an initramfs is optional. Enable it by setting INITRD_IMAGE_VM.
- INITRD_IMAGE_VM ?= ""
- INITRD_VM ?= "${@'${IMGDEPLOYDIR}/${INITRD_IMAGE_VM}-${MACHINE}.cpio.gz' if '${INITRD_IMAGE_VM}' else ''}"
- do_bootdirectdisk[depends] += "${@'${INITRD_IMAGE_VM}:do_image_complete' if '${INITRD_IMAGE_VM}' else ''}"
- BOOTDD_VOLUME_ID ?= "boot"
- BOOTDD_EXTRA_SPACE ?= "16384"
- DISK_SIGNATURE ?= "${DISK_SIGNATURE_GENERATED}"
- DISK_SIGNATURE[vardepsexclude] = "DISK_SIGNATURE_GENERATED"
- build_boot_dd() {
- HDDDIR="${S}/hdd/boot"
- HDDIMG="${S}/hdd.image"
- IMAGE=${IMGDEPLOYDIR}/${IMAGE_NAME}.hdddirect
- populate_kernel $HDDDIR
- if [ "${PCBIOS}" = "1" ]; then
- syslinux_hddimg_populate $HDDDIR
- fi
- if [ "${EFI}" = "1" ]; then
- efi_hddimg_populate $HDDDIR
- fi
- BLOCKS=`du -bks $HDDDIR | cut -f 1`
- BLOCKS=`expr $BLOCKS + ${BOOTDD_EXTRA_SPACE}`
- # Remove it since mkdosfs would fail when it exists
- rm -f $HDDIMG
- mkdosfs -n ${BOOTDD_VOLUME_ID} -S 512 -C $HDDIMG $BLOCKS
- mcopy -i $HDDIMG -s $HDDDIR/* ::/
- if [ "${PCBIOS}" = "1" ]; then
- syslinux_hdddirect_install $HDDIMG
- fi
- chmod 644 $HDDIMG
- ROOTFSBLOCKS=`du -Lbks ${ROOTFS} | cut -f 1`
- TOTALSIZE=`expr $BLOCKS + $ROOTFSBLOCKS`
- END1=`expr $BLOCKS \* 1024`
- END2=`expr $END1 + 512`
- END3=`expr \( $ROOTFSBLOCKS \* 1024 \) + $END1`
- echo $ROOTFSBLOCKS $TOTALSIZE $END1 $END2 $END3
- rm -rf $IMAGE
- dd if=/dev/zero of=$IMAGE bs=1024 seek=$TOTALSIZE count=1
- parted $IMAGE mklabel msdos
- parted $IMAGE mkpart primary fat16 0 ${END1}B
- parted $IMAGE unit B mkpart primary ext2 ${END2}B ${END3}B
- parted $IMAGE set 1 boot on
- parted $IMAGE print
- awk "BEGIN { printf \"$(echo ${DISK_SIGNATURE} | fold -w 2 | tac | paste -sd '' | sed 's/\(..\)/\\x&/g')\" }" | \
- dd of=$IMAGE bs=1 seek=440 conv=notrunc
- OFFSET=`expr $END2 / 512`
- if [ "${PCBIOS}" = "1" ]; then
- dd if=${STAGING_DATADIR}/syslinux/mbr.bin of=$IMAGE conv=notrunc
- fi
- dd if=$HDDIMG of=$IMAGE conv=notrunc seek=1 bs=512
- dd if=${ROOTFS} of=$IMAGE conv=notrunc seek=$OFFSET bs=512
- cd ${IMGDEPLOYDIR}
- ln -sf ${IMAGE_NAME}.hdddirect ${IMGDEPLOYDIR}/${IMAGE_LINK_NAME}.hdddirect
- }
- python do_bootdirectdisk() {
- validate_disk_signature(d)
- set_live_vm_vars(d, 'VM')
- if d.getVar("PCBIOS", True) == "1":
- bb.build.exec_func('build_syslinux_cfg', d)
- if d.getVar("EFI", True) == "1":
- bb.build.exec_func('build_efi_cfg', d)
- bb.build.exec_func('build_boot_dd', d)
- }
- def generate_disk_signature():
- import uuid
- signature = str(uuid.uuid4())[:8]
- if signature != '00000000':
- return signature
- else:
- return 'ffffffff'
- def validate_disk_signature(d):
- import re
- disk_signature = d.getVar("DISK_SIGNATURE", True)
- if not re.match(r'^[0-9a-fA-F]{8}$', disk_signature):
- bb.fatal("DISK_SIGNATURE '%s' must be an 8 digit hex string" % disk_signature)
- DISK_SIGNATURE_GENERATED := "${@generate_disk_signature()}"
- run_qemu_img (){
- type="$1"
- qemu-img convert -O $type ${IMGDEPLOYDIR}/${IMAGE_LINK_NAME}.hdddirect ${IMGDEPLOYDIR}/${IMAGE_NAME}.$type
- ln -sf ${IMAGE_NAME}.$type ${IMGDEPLOYDIR}/${IMAGE_LINK_NAME}.$type
- }
- create_vmdk_image () {
- run_qemu_img vmdk
- }
- create_vdi_image () {
- run_qemu_img vdi
- }
- create_qcow2_image () {
- run_qemu_img qcow2
- }
- python do_vmimg() {
- if 'vmdk' in d.getVar('IMAGE_FSTYPES', True):
- bb.build.exec_func('create_vmdk_image', d)
- if 'vdi' in d.getVar('IMAGE_FSTYPES', True):
- bb.build.exec_func('create_vdi_image', d)
- if 'qcow2' in d.getVar('IMAGE_FSTYPES', True):
- bb.build.exec_func('create_qcow2_image', d)
- }
- addtask bootdirectdisk before do_vmimg
- addtask vmimg after do_bootdirectdisk before do_image_complete
- do_vmimg[depends] += "qemu-native:do_populate_sysroot"
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