132 lines
4.1 KiB
Plaintext
132 lines
4.1 KiB
Plaintext
inherit image
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# Add the fstypes we need
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IMAGE_FSTYPES_append = " tar.bz2 rpi-sdimg"
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# Ensure required utilities are present
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IMAGE_DEPENDS_rpi-sdimg = "genext2fs-native e2fsprogs-native bcm2835-bootfiles bcm2835-kernel-image"
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# Register this as an avalable type of image.
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IMAGE_TYPES_append = " rpi-sdimg"
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# Change this to match your host distro
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LOSETUP ?= "/sbin/losetup"
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# Since these need to go in /etc/fstab we can hardcode them
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# Since the vars are weakly assigned, you can override them from your local.conf
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LOOPDEV ?= "/dev/loop1"
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LOOPDEV_BOOT ?= "/dev/loop2"
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LOOPDEV_FS ?= "/dev/loop3"
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# Default to 4GiB images
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SDIMG_SIZE ?= "444"
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# FS type for rootfs
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ROOTFSTYPE ?= "ext4"
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BOOTPARTNAME ?= "${MACHINE}"
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IMAGEDATESTAMP = "${@time.strftime('%Y.%m.%d',time.gmtime())}"
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# Additional files and/or directories to be copied into the vfat partition from the IMAGE_ROOTFS.
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FATPAYLOAD ?= ""
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IMAGE_CMD_rpi-sdimg () {
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SDIMG=${WORKDIR}/sd.img
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# sanity check fstab entry for boot partition mounting
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if [ "x$(cat /etc/fstab | grep ${LOOPDEV_BOOT} | grep ${WORKDIR}/tmp-mnt-boot | grep user || true)" = "x" ]; then
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echo "/etc/fstab entries need to be created with the user flag for the loop devices like:"
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echo "${LOOPDEV_BOOT} ${WORKDIR}/tmp-mnt-boot vfat user 0 0"
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false
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fi
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# cleanup loops
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for loop in ${LOOPDEV} ${LOOPDEV_BOOT} ${LOOPDEV_FS} ; do
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${LOSETUP} -d $loop || true
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done
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# If an SD image is already present, reuse and reformat it
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if [ ! -e ${SDIMG} ] ; then
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dd if=/dev/zero of=${SDIMG} bs=$(echo '255 * 63 * 512' | bc) count=${SDIMG_SIZE}
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fi
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${LOSETUP} ${LOOPDEV} ${SDIMG}
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# Create partition table
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dd if=/dev/zero of=${LOOPDEV} bs=1024 count=1024
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SIZE=$(/sbin/fdisk -l ${LOOPDEV} | grep Disk | grep bytes | awk '{print $5}')
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CYLINDERS=$(echo $SIZE/255/63/512 | bc)
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{
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echo ,9,0x0C,*
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echo ,,,-
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} | /sbin/sfdisk -D -H 255 -S 63 -C ${CYLINDERS} ${LOOPDEV}
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# Prepare loop devices for boot and filesystem partitions
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BOOT_OFFSET=32256
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FS_OFFSET_SECT=$(/sbin/fdisk -l -u ${LOOPDEV} 2>&1 | grep Linux | perl -p -i -e "s/\s+/ /"|cut -d " " -f 2)
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FS_OFFSET=$(echo "$FS_OFFSET_SECT * 512" | bc)
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FS_SIZE_BLOCKS=$(/sbin/fdisk -l -u ${LOOPDEV} 2>&1 | grep Linux | perl -p -i -e "s/\s+/ /g" \
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|cut -d " " -f 4 | cut -d "+" -f 1)
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LOOPDEV_BLOCKS=$(/sbin/fdisk -l -u ${LOOPDEV} 2>&1 | grep FAT | perl -p -i -e "s/\s+/ /g"|cut -d " " -f 5)
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LOOPDEV_BYTES=$(echo "$LOOPDEV_BLOCKS * 1024" | bc)
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${LOSETUP} -d ${LOOPDEV}
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${LOSETUP} ${LOOPDEV_BOOT} ${SDIMG} -o ${BOOT_OFFSET}
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/sbin/mkfs.vfat ${LOOPDEV_BOOT} -n ${BOOTPARTNAME} $LOOPDEV_BLOCKS
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# Prepare boot partion. First mount the boot partition, and copy the bootloader and supporting files.
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mkdir -p ${WORKDIR}/tmp-mnt-boot
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mount $LOOPDEV_BOOT ${WORKDIR}/tmp-mnt-boot
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echo "Copying bootloader and prepended kernel.img into the boot partition"
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cp -v ${DEPLOY_DIR_IMAGE}/bcm2835-bootfiles/* ${WORKDIR}/tmp-mnt-boot || true
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if [ -n ${FATPAYLOAD} ] ; then
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echo "Copying payload into VFAT"
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for entry in ${FATPAYLOAD} ; do
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# add the || true to stop aborting on vfat issues like not supporting .~lock files
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cp -av ${IMAGE_ROOTFS}$entry ${WORKDIR}/tmp-mnt-boot || true
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done
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fi
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echo "${IMAGE_NAME}-${IMAGEDATESTAMP}" > ${IMAGE_ROOTFS}/etc/image-version-info
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cp -v ${IMAGE_ROOTFS}/etc/image-version-info ${WORKDIR}/tmp-mnt-boot || true
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# Cleanup VFAT mount
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echo "Cleaning up VFAT mount"
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umount ${WORKDIR}/tmp-mnt-boot
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${LOSETUP} -d ${LOOPDEV_BOOT} || true
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# Prepare rootfs parition
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echo "Creating rootfs loopback"
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${LOSETUP} ${LOOPDEV_FS} ${SDIMG} -o ${FS_OFFSET}
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FS_NUM_INODES=$(echo $FS_SIZE_BLOCKS / 4 | bc)
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case "${ROOTFSTYPE}" in
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ext3)
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genext2fs -z -N $FS_NUM_INODES -b $FS_SIZE_BLOCKS -d ${IMAGE_ROOTFS} ${LOOPDEV_FS}
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tune2fs -L ${IMAGE_NAME} -j ${LOOPDEV_FS}
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;;
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ext4)
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genext2fs -z -N $FS_NUM_INODES -b $FS_SIZE_BLOCKS -d ${IMAGE_ROOTFS} ${LOOPDEV_FS}
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tune2fs -L ${IMAGE_NAME} -j -O extents,uninit_bg,dir_index ${LOOPDEV_FS}
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;;
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*)
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echo "Please set ROOTFSTYPE to something supported"
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exit 1
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;;
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esac
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${LOSETUP} -d ${LOOPDEV_FS} || true
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gzip -c ${WORKDIR}/sd.img > ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}-${IMAGEDATESTAMP}.img.gz
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rm -f ${WORKDIR}/sd.img
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}
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