From: Charles-Antoine Couret <[email protected]>

If defined, this variable value overrides the size of ext* partition file 
created by mkfs.
Otherwise previous logic based on ROOTFS_SIZE variable is used.

It should be set when the final file size would not be above a specific value 
due to fixed
partitionning for example.

Signed-off-by: Charles-Antoine Couret <[email protected]>
---
 meta/classes-recipe/image_types.bbclass | 24 ++++++++++++++++--------
 1 file changed, 16 insertions(+), 8 deletions(-)

diff --git a/meta/classes-recipe/image_types.bbclass 
b/meta/classes-recipe/image_types.bbclass
index 2905c23d4e..bcb0c75b9f 100644
--- a/meta/classes-recipe/image_types.bbclass
+++ b/meta/classes-recipe/image_types.bbclass
@@ -77,24 +77,32 @@ IMAGE_CMD:cramfs = "mkfs.cramfs ${IMAGE_ROOTFS} 
${IMGDEPLOYDIR}/${IMAGE_NAME}.cr
 
 oe_mkext234fs () {
        fstype=$1
+       image_file_maxsize=$2
        extra_imagecmd=""
+       rootfs_file_size=$ROOTFS_SIZE
 
-       if [ $# -gt 1 ]; then
-               shift
+       if [ $# -gt 2 ]; then
+               shift 2
                extra_imagecmd=$@
        fi
 
+
+       if [ ${image_file_maxsize} -ne 0 ]; then
+               rootfs_file_size=${image_file_maxsize}
+       fi
+
        # If generating an empty image the size of the sparse block should be 
large
        # enough to allocate an ext4 filesystem using 4096 bytes per inode, 
this is
        # about 60K, so dd needs a minimum count of 60, with bs=1024 (bytes per 
IO)
        eval local COUNT=\"0\"
        eval local MIN_COUNT=\"60\"
-       if [ $ROOTFS_SIZE -lt $MIN_COUNT ]; then
+       if [ $rootfs_file_size -lt $MIN_COUNT ]; then
                eval COUNT=\"$MIN_COUNT\"
        fi
+
        # Create a sparse image block
-       bbdebug 1 Executing "dd if=/dev/zero 
of=${IMGDEPLOYDIR}/${IMAGE_NAME}.$fstype seek=$ROOTFS_SIZE count=$COUNT bs=1024"
-       dd if=/dev/zero of=${IMGDEPLOYDIR}/${IMAGE_NAME}.$fstype 
seek=$ROOTFS_SIZE count=$COUNT bs=1024
+       bbdebug 1 Executing "dd if=/dev/zero 
of=${IMGDEPLOYDIR}/${IMAGE_NAME}.$fstype seek=$rootfs_file_size count=$COUNT 
bs=1024"
+       dd if=/dev/zero of=${IMGDEPLOYDIR}/${IMAGE_NAME}.$fstype 
seek=$rootfs_file_size count=$COUNT bs=1024
        bbdebug 1 "Actual Rootfs size:  `du -s ${IMAGE_ROOTFS}`"
        bbdebug 1 "Actual Partition size: `stat -c '%s' 
${IMGDEPLOYDIR}/${IMAGE_NAME}.$fstype`"
        bbdebug 1 Executing "mkfs.$fstype -F $extra_imagecmd 
${IMGDEPLOYDIR}/${IMAGE_NAME}.$fstype -d ${IMAGE_ROOTFS}"
@@ -103,9 +111,9 @@ oe_mkext234fs () {
        fsck.$fstype -pvfD ${IMGDEPLOYDIR}/${IMAGE_NAME}.$fstype || [ $? -le 3 ]
 }
 
-IMAGE_CMD:ext2 = "oe_mkext234fs ext2 ${EXTRA_IMAGECMD}"
-IMAGE_CMD:ext3 = "oe_mkext234fs ext3 ${EXTRA_IMAGECMD}"
-IMAGE_CMD:ext4 = "oe_mkext234fs ext4 ${EXTRA_IMAGECMD}"
+IMAGE_CMD:ext2 = "oe_mkext234fs ext2 ${@get_max_image_size(d, 'ext2')} 
${EXTRA_IMAGECMD}"
+IMAGE_CMD:ext3 = "oe_mkext234fs ext3 ${@get_max_image_size(d, 'ext3')} 
${EXTRA_IMAGECMD}"
+IMAGE_CMD:ext4 = "oe_mkext234fs ext4 ${@get_max_image_size(d, 'ext4')} 
${EXTRA_IMAGECMD}"
 
 MIN_BTRFS_SIZE ?= "16384"
 IMAGE_CMD:btrfs () {
-- 
2.53.0

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