172 lines
5.2 KiB
Plaintext
172 lines
5.2 KiB
Plaintext
# image-vm.bbclass
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# (loosly based off image-live.bbclass Copyright (C) 2004, Advanced Micro Devices, Inc.)
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#
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# Create an image which can be placed directly onto a harddisk using dd and then
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# booted.
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#
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# This uses syslinux. extlinux would have been nice but required the ext2/3
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# partition to be mounted. grub requires to run itself as part of the install
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# process.
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#
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# The end result is a 512 boot sector populated with an MBR and partition table
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# followed by an msdos fat16 partition containing syslinux and a linux kernel
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# completed by the ext2/3 rootfs.
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#
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# We have to push the msdos parition table size > 16MB so fat 16 is used as parted
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# won't touch fat12 partitions.
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inherit live-vm-common
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do_bootdirectdisk[depends] += "dosfstools-native:do_populate_sysroot \
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virtual/kernel:do_deploy \
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syslinux:do_populate_sysroot \
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syslinux-native:do_populate_sysroot \
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parted-native:do_populate_sysroot \
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mtools-native:do_populate_sysroot \
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${PN}:do_image_${VM_ROOTFS_TYPE} \
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"
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IMAGE_TYPEDEP_vmdk = "${VM_ROOTFS_TYPE}"
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IMAGE_TYPEDEP_vdi = "${VM_ROOTFS_TYPE}"
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IMAGE_TYPEDEP_qcow2 = "${VM_ROOTFS_TYPE}"
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IMAGE_TYPEDEP_hdddirect = "${VM_ROOTFS_TYPE}"
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IMAGE_TYPES_MASKED += "vmdk vdi qcow2 hdddirect"
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VM_ROOTFS_TYPE ?= "ext4"
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ROOTFS ?= "${IMGDEPLOYDIR}/${IMAGE_LINK_NAME}.${VM_ROOTFS_TYPE}"
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# Used by bootloader
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LABELS_VM ?= "boot"
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ROOT_VM ?= "root=/dev/sda2"
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# Using an initramfs is optional. Enable it by setting INITRD_IMAGE_VM.
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INITRD_IMAGE_VM ?= ""
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INITRD_VM ?= "${@'${IMGDEPLOYDIR}/${INITRD_IMAGE_VM}-${MACHINE}.cpio.gz' if '${INITRD_IMAGE_VM}' else ''}"
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do_bootdirectdisk[depends] += "${@'${INITRD_IMAGE_VM}:do_image_complete' if '${INITRD_IMAGE_VM}' else ''}"
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BOOTDD_VOLUME_ID ?= "boot"
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BOOTDD_EXTRA_SPACE ?= "16384"
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DISK_SIGNATURE ?= "${DISK_SIGNATURE_GENERATED}"
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DISK_SIGNATURE[vardepsexclude] = "DISK_SIGNATURE_GENERATED"
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build_boot_dd() {
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HDDDIR="${S}/hdd/boot"
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HDDIMG="${S}/hdd.image"
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IMAGE=${IMGDEPLOYDIR}/${IMAGE_NAME}.hdddirect
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populate_kernel $HDDDIR
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if [ "${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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BLOCKS=`du -bks $HDDDIR | cut -f 1`
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BLOCKS=`expr $BLOCKS + ${BOOTDD_EXTRA_SPACE}`
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# Remove it since mkdosfs would fail when it exists
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rm -f $HDDIMG
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mkdosfs -n ${BOOTDD_VOLUME_ID} -S 512 -C $HDDIMG $BLOCKS
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mcopy -i $HDDIMG -s $HDDDIR/* ::/
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if [ "${PCBIOS}" = "1" ]; then
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syslinux_hdddirect_install $HDDIMG
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fi
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chmod 644 $HDDIMG
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ROOTFSBLOCKS=`du -Lbks ${ROOTFS} | cut -f 1`
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TOTALSIZE=`expr $BLOCKS + $ROOTFSBLOCKS`
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END1=`expr $BLOCKS \* 1024`
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END2=`expr $END1 + 512`
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END3=`expr \( $ROOTFSBLOCKS \* 1024 \) + $END1`
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echo $ROOTFSBLOCKS $TOTALSIZE $END1 $END2 $END3
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rm -rf $IMAGE
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dd if=/dev/zero of=$IMAGE bs=1024 seek=$TOTALSIZE count=1
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parted $IMAGE mklabel msdos
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parted $IMAGE mkpart primary fat16 0 ${END1}B
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parted $IMAGE unit B mkpart primary ext2 ${END2}B ${END3}B
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parted $IMAGE set 1 boot on
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parted $IMAGE print
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awk "BEGIN { printf \"$(echo ${DISK_SIGNATURE} | sed 's/\(..\)\(..\)\(..\)\(..\)/\\x\4\\x\3\\x\2\\x\1/')\" }" | \
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dd of=$IMAGE bs=1 seek=440 conv=notrunc
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OFFSET=`expr $END2 / 512`
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if [ "${PCBIOS}" = "1" ]; then
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dd if=${STAGING_DATADIR}/syslinux/mbr.bin of=$IMAGE conv=notrunc
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fi
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dd if=$HDDIMG of=$IMAGE conv=notrunc seek=1 bs=512
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dd if=${ROOTFS} of=$IMAGE conv=notrunc seek=$OFFSET bs=512
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cd ${IMGDEPLOYDIR}
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ln -sf ${IMAGE_NAME}.hdddirect ${IMGDEPLOYDIR}/${IMAGE_LINK_NAME}.hdddirect
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}
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python do_bootdirectdisk() {
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validate_disk_signature(d)
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set_live_vm_vars(d, 'VM')
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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_boot_dd', d)
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}
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def generate_disk_signature():
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import uuid
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signature = str(uuid.uuid4())[:8]
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if signature != '00000000':
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return signature
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else:
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return 'ffffffff'
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def validate_disk_signature(d):
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import re
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disk_signature = d.getVar("DISK_SIGNATURE")
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if not re.match(r'^[0-9a-fA-F]{8}$', disk_signature):
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bb.fatal("DISK_SIGNATURE '%s' must be an 8 digit hex string" % disk_signature)
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DISK_SIGNATURE_GENERATED := "${@generate_disk_signature()}"
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run_qemu_img (){
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type="$1"
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qemu-img convert -O $type ${IMGDEPLOYDIR}/${IMAGE_LINK_NAME}.hdddirect ${IMGDEPLOYDIR}/${IMAGE_NAME}.$type
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ln -sf ${IMAGE_NAME}.$type ${IMGDEPLOYDIR}/${IMAGE_LINK_NAME}.$type
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}
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create_vmdk_image () {
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run_qemu_img vmdk
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}
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create_vdi_image () {
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run_qemu_img vdi
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}
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create_qcow2_image () {
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run_qemu_img qcow2
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}
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python do_vmimg() {
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if 'vmdk' in d.getVar('IMAGE_FSTYPES'):
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bb.build.exec_func('create_vmdk_image', d)
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if 'vdi' in d.getVar('IMAGE_FSTYPES'):
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bb.build.exec_func('create_vdi_image', d)
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if 'qcow2' in d.getVar('IMAGE_FSTYPES'):
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bb.build.exec_func('create_qcow2_image', d)
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}
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addtask bootdirectdisk before do_vmimg
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addtask vmimg after do_bootdirectdisk before do_image_complete
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do_vmimg[depends] += "qemu-native:do_populate_sysroot"
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