[Buildroot] Need help with genimage

["Jörg Krause" <joerg.krause@embedded.rocks>]

Hi,

I am trying to add support for the Banana Pro board to Buildroot. The
Banana is similiar to the Orange Pi, so I am using a genimage.cfg based
on the Pi for creating the sd card image:

    image boot.vfat {
    	    vfat {
    	    	    files = {
    	    	    	    "zImage",
    	    	    	    "sun7i-a20-bananapro.dtb",
    	    	    	    "boot.scr"
    	    	    }
    	    }
    	    size = 10M
    }

    image sdcard.img {
    	    hdimage {
    	    }

    	    partition u-boot {
    	    	    in-partition-table = "no"
    	    	    image = "u-boot-sunxi-with-spl.bin"
    	    	    offset = 8192
    	    	    size = 1040384 # 1MB - 8192
    	    }

    	    partition boot {
    	    	    partition-type = 0xC
    	    	    bootable = "true"
    	    	    image = "boot.vfat"
    	    }

    	    partition rootfs {
    	    	    partition-type = 0x83
    	    	    image = "rootfs.ext4"
    	    	    size = 512M
    	    }
    }

I am able to generate the sd card image and copy it to the sd card
using Suses imagewriter. The board boots fine. However, the rootfs size
is not 512MB as expected:

# df -hT
Filesystem???????????Type????????????Size??????Used Available Use%
Mounted on
/dev/root????????????ext4???????????38.7M?????37.9M?????????0 100% /
devtmpfs?????????????devtmpfs??????501.9M?????????0????501.9M???0% /dev
tmpfs????????????????tmpfs?????????502.4M?????????0????502.4M???0%
/dev/shm
tmpfs????????????????tmpfs?????????502.4M??????3.9M????498.4M???1% /tmp
tmpfs????????????????tmpfs?????????502.4M?????24.0K????502.4M???0% /run

I am not able to create any file larger file on the filesystem nor
start some programs.

What am I missing here? Can somebody enlighten me please :-)

Best regards,
J?rg Krause