Hardware flowtable offload from multiple tables?

Hi all,

Please CC me on replies as I'm not subscribed to the list.

I've been trying to get hardware flowtable offload going on a ConnectX-6 DX
card. I have managed to create the flowtable (needed to create a SF interface
and apply the flowtable to that - using the PF directly does not work).

However, it seems that a device can only be referenced from one flowtable,
and the scope of the flowtable is only the current table. So if I have separate
`ip` and `ip6` table types, I can't do hardware flowtable offload from both. Is
my understanding correct? Are there any workarounds (other than changing
everything over to a combined `inet` table) available?

I can create either an `ip` or `ip6` table with offloaded flowtable, but doing
both gives "Device or resource busy" error: 
```
david@vyos01:~$ sudo nft add 'table ip test  { flowtable fttest { hook ingress priority 0; devices =  { en1f0pf1sf88 }; flags offload; }; }'
david@vyos01:~$ 
david@vyos01:~$ sudo nft add 'table ip6 test  { flowtable fttest { hook ingress priority 0; devices =  { en1f0pf1sf88 }; flags offload; }; }'
Error: Could not process rule: Device or resource busy
add table ip6 test  { flowtable fttest { hook ingress priority 0; devices =  { en1f0pf1sf88 }; flags offload; }; }
                                ^^^^^^
```

Thanks,
Davíð