1 files changed, 13 insertions, 0 deletions

diff --git a/meta/classes/bootimg.bbclass b/meta/classes/bootimg.bbclass
index 605edc911e..ab1d1bdd33 100644
--- a/meta/classes/bootimg.bbclass
+++ b/meta/classes/bootimg.bbclass
@@ -249,6 +249,19 @@ build_hddimg() {
                         efi_hddimg_populate ${HDDDIR}
                 fi
 
+                # Check the size of ${HDDDIR}/rootfs.img, error out if it
+                # exceeds 4GB, it is the single file's max size of FAT fs.
+                if [ -f ${HDDDIR}/rootfs.img ]; then
+                        rootfs_img_size=`stat -c '%s' ${HDDDIR}/rootfs.img`
+                        max_size=`expr 4 \* 1024 \* 1024 \* 1024`
+                        if [ $rootfs_img_size -gt $max_size ]; then
+                                bberror "${HDDDIR}/rootfs.img execeeds 4GB,"
+                                bberror "this doesn't work on FAT filesystem, you can try either of:"
+                                bberror "1) Reduce the size of rootfs.img"
+                                bbfatal "2) Use iso, vmdk or vdi to instead of hddimg\n"
+                        fi
+                fi
+
                 build_fat_img ${HDDDIR} ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.hddimg
 
                 if [ "${PCBIOS}" = "1" ]; then