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SubjectRe: How to cope with two incompatible overlayfs formats out in the wild
On Tue, Nov 18, 2014 at 03:28:03PM +0100, Miklos Szeredi wrote:

> So from mainline we need two things:
>
> - when mounting distinguish between old and new format.
>
> - userspace can detect which formats are supported by the kernel.
>
> If we'd have a different filesystem type for the old and new formats,
> then that would solve both (checking /proc/filesystems would indicate
> which one is supported).
>
> Unfortunately that would mean having to change "overlayfs" type to
> something else in 3.18. Question is, is there some sane name which
> would fit? "overlayfs2" is perhaps the best, but I'm not overly
> enthusiastic about it.
>
> Any other ideas?

Umm... What does the old one do when it sees workdir=<something> in the
options?


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