diff options
Diffstat (limited to 'meta/classes/image-vm.bbclass')
| -rw-r--r-- | meta/classes/image-vm.bbclass | 216 |
1 files changed, 198 insertions, 18 deletions
diff --git a/meta/classes/image-vm.bbclass b/meta/classes/image-vm.bbclass index 8608ec0c11..68cf89b68d 100644 --- a/meta/classes/image-vm.bbclass +++ b/meta/classes/image-vm.bbclass @@ -1,37 +1,217 @@ +# image-vm.bbclass +# (loosly based off bootimg.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. -LABELS_VM ?= "boot" +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 \ + ${PN}:do_image_ext4 \ + " + +IMAGE_TYPEDEP_vmdk = "ext4" +IMAGE_TYPEDEP_vdi = "ext4" +IMAGE_TYPEDEP_qcow2 = "ext4" +IMAGE_TYPEDEP_hdddirect = "ext4" +IMAGE_TYPES_MASKED += "vmdk vdi qcow2 hdddirect" +ROOTFS ?= "${DEPLOY_DIR_IMAGE}/${IMAGE_LINK_NAME}.ext4" + +# Used by bootloader +LABELS_VM ?= "boot" +ROOT_VM ?= "root=/dev/sda2" # Using an initramfs is optional. Enable it by setting INITRD_IMAGE_VM. INITRD_IMAGE_VM ?= "" INITRD_VM ?= "${@'${DEPLOY_DIR_IMAGE}/${INITRD_IMAGE_VM}-${MACHINE}.cpio.gz' if '${INITRD_IMAGE_VM}' else ''}" do_bootdirectdisk[depends] += "${@'${INITRD_IMAGE_VM}:do_image_complete' if '${INITRD_IMAGE_VM}' else ''}" -# need to define the dependency and the ROOTFS for directdisk -do_bootdirectdisk[depends] += "${PN}:do_image_ext4" -ROOTFS ?= "${DEPLOY_DIR_IMAGE}/${IMAGE_LINK_NAME}.ext4" +BOOTDD_VOLUME_ID ?= "boot" +BOOTDD_EXTRA_SPACE ?= "16384" -# creating VM images relies on having a hdddirect so ensure we inherit it here. -inherit boot-directdisk +EFI = "${@bb.utils.contains("MACHINE_FEATURES", "efi", "1", "0", d)}" +EFI_PROVIDER ?= "grub-efi" +EFI_CLASS = "${@bb.utils.contains("MACHINE_FEATURES", "efi", "${EFI_PROVIDER}", "", d)}" -IMAGE_TYPEDEP_vmdk = "ext4" -IMAGE_TYPEDEP_vdi = "ext4" -IMAGE_TYPEDEP_qcow2 = "ext4" -IMAGE_TYPEDEP_hdddirect = "ext4" -IMAGE_TYPES_MASKED += "vmdk vdi qcow2 hdddirect" +# Include legacy boot if MACHINE_FEATURES includes "pcbios" or if it does not +# contain "efi". This way legacy is supported by default if neither is +# specified, maintaining the original behavior. +def pcbios(d): + pcbios = bb.utils.contains("MACHINE_FEATURES", "pcbios", "1", "0", d) + if pcbios == "0": + pcbios = bb.utils.contains("MACHINE_FEATURES", "efi", "0", "1", d) + return pcbios + +def pcbios_class(d): + if d.getVar("PCBIOS", True) == "1": + return "syslinux" + return "" + +PCBIOS = "${@pcbios(d)}" +PCBIOS_CLASS = "${@pcbios_class(d)}" + +# Get the build_syslinux_cfg() function from the syslinux class +inherit ${PCBIOS_CLASS} +inherit ${EFI_CLASS} + +DISK_SIGNATURE ?= "${DISK_SIGNATURE_GENERATED}" + +boot_direct_populate() { + dest=$1 + install -d $dest + + # Install bzImage, initrd, and rootfs.img in DEST for all loaders to use. + if [ -e ${DEPLOY_DIR_IMAGE}/bzImage ]; then + install -m 0644 ${DEPLOY_DIR_IMAGE}/bzImage $dest/vmlinuz + fi + + # initrd is made of concatenation of multiple filesystem images + if [ -n "${INITRD}" ]; then + rm -f $dest/initrd + for fs in ${INITRD} + do + if [ -s "${fs}" ]; then + cat ${fs} >> $dest/initrd + else + bbfatal "${fs} is invalid. initrd image creation failed." + fi + done + chmod 0644 $dest/initrd + fi +} + +build_boot_dd() { + HDDDIR="${S}/hdd/boot" + HDDIMG="${S}/hdd.image" + IMAGE=${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.hdddirect + + boot_direct_populate $HDDDIR + if [ "${PCBIOS}" = "1" ]; then + syslinux_hddimg_populate $HDDDIR + fi + if [ "${EFI}" = "1" ]; then + efi_hddimg_populate $HDDDIR + fi + + if [ "x${AUTO_SYSLINUXMENU}" = "x1" ] ; then + install -m 0644 ${STAGING_DIR}/${MACHINE}/usr/share/syslinux/vesamenu.c32 $HDDDIR/${SYSLINUXDIR}/ + if [ "x${SYSLINUX_SPLASH}" != "x" ] ; then + install -m 0644 ${SYSLINUX_SPLASH} $HDDDIR/${SYSLINUXDIR}/splash.lss + fi + fi + + BLOCKS=`du -bks $HDDDIR | cut -f 1` + BLOCKS=`expr $BLOCKS + ${BOOTDD_EXTRA_SPACE}` + + # Ensure total sectors is an integral number of sectors per + # track or mcopy will complain. Sectors are 512 bytes, and we + # generate images with 32 sectors per track. This calculation is + # done in blocks, thus the mod by 16 instead of 32. + BLOCKS=$(expr $BLOCKS + $(expr 16 - $(expr $BLOCKS % 16))) + + # 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 ${DEPLOY_DIR_IMAGE} + rm -f ${DEPLOY_DIR_IMAGE}/${IMAGE_LINK_NAME}.hdddirect + ln -s ${IMAGE_NAME}.hdddirect ${DEPLOY_DIR_IMAGE}/${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 ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.hdddirect ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.$type + ln -sf ${IMAGE_NAME}.$type ${DEPLOY_DIR_IMAGE}/${IMAGE_LINK_NAME}.$type +} create_vmdk_image () { - qemu-img convert -O vmdk ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.hdddirect ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.vmdk - ln -sf ${IMAGE_NAME}.vmdk ${DEPLOY_DIR_IMAGE}/${IMAGE_LINK_NAME}.vmdk + run_qemu_img vmdk } create_vdi_image () { - qemu-img convert -O vdi ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.hdddirect ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.vdi - ln -sf ${IMAGE_NAME}.vdi ${DEPLOY_DIR_IMAGE}/${IMAGE_LINK_NAME}.vdi + run_qemu_img vdi } create_qcow2_image () { - qemu-img convert -O qcow2 ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.hdddirect ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.qcow2 - ln -sf ${IMAGE_NAME}.qcow2 ${DEPLOY_DIR_IMAGE}/${IMAGE_LINK_NAME}.qcow2 + run_qemu_img qcow2 } python do_vmimg() { @@ -43,6 +223,6 @@ python do_vmimg() { 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" - |