Re: [PATCH 1/3] exportfs: Rename get_uuid() to get_disk_uuid()

[Amir Goldstein]

On Wed, Jan 14, 2026 at 5:38 PM André Almeida <andrealmeid@xxxxxxxxxx> wrote:
>
> Em 14/01/2026 07:12, Amir Goldstein escreveu:
>
> [...]
>
> >
> > Whether or not we should repurpose the existing get_uuid() I don't
> > know - that depends whether pNFS expects the same UUID from an
> > "xfs clone" as overlayfs would.
> >
>
> If we go in that direction, do you think it would be reasonable to have
> this as a super_block member/helper?

IDK. maybe.

> Also do you know any other fs that require this type of workaround on ovl?

Not really.
There are a bunch of fs without UUID for which the mount options
"uuid=off" and "uuid=null" were implemented.
I think we support index with those fs where there is a single lower
layer, so you could use the same trick, but not sure.

Thanks,
Amir.