Omnia Turris with 18.06 --- where's the disk gone?

I'd successfully moved to the rc1 at the end of June, and just upgraded easily to the release 18.06.
I hadn't noticed that so little disk space was available on the Omnia... it seems to be configured with a very small partition of the mmc. I suspect that I need to maybe go back and adjust things via u-boot?

boot messages confirm ~7G available:
[ 1.646249] mmc0: new high speed MMC card at address 0001
[ 1.651858] mmcblk0: mmc0:0001 008G30 7.28 GiB
[ 1.656451] mmcblk0boot0: mmc0:0001 008G30 partition 1 4.00 MiB
[ 1.662434] mmcblk0boot1: mmc0:0001 008G30 partition 2 4.00 MiB
[ 1.668408] mmcblk0rpmb: mmc0:0001 008G30 partition 3 4.00 MiB
[ 1.675387] mmcblk0: p1 p2

p1 contains zImage and a dtb file in a vfat file system, 16M in size.
p2 contains a squashfs, which I guess is what is in /rom.

So, where is the rest of the mmc?
One reason I wanted openwrt (there are many reasons), was for better lxc support, so I actually need some storage....


better be carefull with that. dont want to wear-down the routers internal flash with swap-writes from some overblown webshit.
better to hookup some cheap usb hdd

Turris has now an alpha of OS 4.0, based upon 18.06. It has all the disk space available.