FEATURE: BTRFS Subvolume quota

[Tux12Fun]

It would be nice to have a Quota Support for the Subvolume.
Unfortunately I haven't written something in Python, so I'm unable
to code it on my one. I hope this contribution is usefull.

The commands would be:

btrfs quota enable /path/to/subvolume
btrfs qgroup limit 4m /path/to/subvolume

Maybe we could define it like this:

 btrfs__subvolumes:         {
    "/data/mariadb/logs/mariadb":
    dir_owner=mysql
    dir_group=mysql
    state=present,
    "/data/mariadb/data/mariadb":
    dir_owner=mysql
    dir_group=mysql
    state=present,
    "/data/mariadb/data/test1":
    dir_owner=xyz
    dir_group=abc
    quota="4M"
    state=present
 }

A other Question:
What is the reason for:

btrfs__subvolumes_host_group

and

btrfs__subvolumes_host:

I've never used this Variables.

[ypid]

Hi

Thanks for your input. I will consider it when I need quotas for Btrfs but maybe don’t expect this too soon. I can not tell you an ETA currently.

btrfs__subvolumes_host_group vs. btrfs__subvolumes_host

You are right. It is a bit uncommon outside of DebOps currently. Refer to Inventory level scoped variables.