Reproducible XFS Filesystems Builds for VMs

[Luca DiMaio]

Thanks a lot!

L.

On Fri, Oct 24, 2025 at 4:16 PM Arnout Engelen <arnout at bzzt.net> wrote:
>
> On Fri, Oct 24, 2025, at 15:46, Luca DiMaio via rb-general wrote:
>
> Dear list
>
> As of this week xfsprogs 6.17.0 has been released and included is the
> patch that I managed to submit:
> https://git.kernel.org/pub/scm/fs/xfs/xfsprogs-dev.git/commit/?id=8a4ea72724930cfe262ccda03028264e1a81b145
>
> It is now possible to populate an XFS filesystem, similarly to how ext4 works
>
>
> Cool!
>
> I'd like to contribute to the docs of
> https://reproducible-builds.org/docs/system-images/ to add an XFS
> section
> could someone point me to the repo/mailing list for that?
>
>
> That's at https://salsa.debian.org/reproducible-builds/reproducible-website/-/blob/master/_docs/system_images.md?ref_type=heads
>
>
> Kind regards,
>
> Arnout
>
> On Mon, Apr 28, 2025 at 11:25 AM Luca DiMaio <luca.dimaio at chainguard.dev> wrote:
> >
> > At the moment we're at v7 of the patch set which adds ability to
> > populate from a directory, much like ext4:
> > https://lore.kernel.org/linux-xfs/20250426135535.1904972-1-luca.dimaio1@gmail.com/T/#t
> >
> > By default atime/ctime/crtime is set to `gettimeofday()` while mtime
> > is preserved
> > that can be easily worked around with something like `libfaketime` or
> > similar libraries to enforce a date
> >
> > L.
> >
> > On Thu, Apr 24, 2025 at 3:46 PM Bernhard M. Wiedemann
> > <bernhardout at lsmod.de> wrote:
> > >
> > > On 16/04/2025 16.55, Luca DiMaio via rb-general wrote:
> > > > At the moment I've opened an RFC in the XFS mailing list, to improve their
> > > > prototype file functionality, in particular to carry over the inode's timestamps
> > > > from source:
> > >
> > > If these include ctime and atime, those are usually hard to reproduce in
> > > a filesystem.
> > > It would probably be good to have an option to clamp timestamps to a
> > > maximum, similar to tar's --clamp-mtime option or set them all to a
> > > given constant value.
>
>
> --
> Arnout Engelen
> Engelen Open Source
> https://engelen.eu
>