Re: [RFC v3 0/2] vfs / btrfs: add support for ustat()

[Neal Gompa]

On Thu, Apr 15, 2021 at 2:29 PM Luis Chamberlain <mcgrof@xxxxxxxxxx> wrote:
>
> On Thu, Apr 15, 2021 at 02:17:58PM -0400, Josef Bacik wrote:
> > There's a lot of larger things that need to
> > be addressed in general to support the volume approach inside file systems
> > that is going to require a lot of work inside of VFS.  If you feel like
> > tackling that work and then wiring up btrfs by all means have at it, but I'm
> > not seeing a urgent need to address this.  Thanks,
>
> That's precisely what I what I want to hear me about. Things like this.
> Would btrfs be the ony user of volumes inside filesystem? Jeff had
> mentioned before this could also allow namespaces per volumes, and this
> might be a desirable feature.
>
> What else?

Wouldn't this be useful for union filesystems like OverlayFS? Or other
filesystems that support nested filesystems like bcachefs?



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