Re: [PATCH v2 0/3] fs/nfsd: accept a backdated timestamp from a delegation holder

[Jeff Layton]

On Fri, 2026-09-04 at 12:50 +0200, Christian Brauner wrote:
> > The main problem is that an attribute delegation has strict rules about
> > updates can be done, and that prevents applications that backdate
> > timestamps on files after writing them, (e.g. tar -x, cp -p, etc.) from
> > setting them properly.
> > 
> > We could fix this on the client by making it always issue an RPC for the
> > SETATTR, but that would harm performance in these common use-cases.
> > This set allows the server to accept some of these backdated mtime
> > updates, by changing how the ctime is handled.
> > 
> > It'd be nice to see this in v7.4.
> > 
> > Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
> > ---
> 
> There's a bunch of Sashiko comments outstanding, Jeff. Let me know, if I
> can ignore them.


At least one of them looks valid. I'll plan to send a v3.

Thanks,
-- 
Jeff Layton <jlayton@xxxxxxxxxx>