Re: [Libguestfs] [PATCHv4 0/2] Introduce vfs_minimum_size API to get minimum filesystem size.

Richard W.M. Jones
Tue, 20 Oct 2015 17:58:46 -0000

On Tue, Oct 20, 2015 at 08:56:25PM +0300, Maxim Perevedentsev
wrote:
> I have an issue with btrfs:
>
> There's an API
> > btrfs inspect-internal min-dev-size /sysroot/
>
> But this API is available only in btrfs-progs >= 4.2.
> Before this, there's no reliable way to get minimum size (I could
> parse "btrfs filesystem show", but it is veeery inaccurate).
>
> Can we require btrfs-progs v4.2? Or how should I work-around this issue?

Well it's a new API, so we can just tell people they need new
btrfs-progs if they want to use the new API.

It would be a problem if we were changing an old API, but that's not
the case here.

Rich.

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