Re: [PATCH 4/4] ovl: alllow remote upper

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On Thu, Feb 20, 2020 at 10:00 PM Amir Goldstein <amir73il@xxxxxxxxx> wrote:
>
> On Thu, Feb 20, 2020 at 9:52 AM Amir Goldstein <amir73il@xxxxxxxxx> wrote:
> >
> > On Tue, Feb 4, 2020 at 7:02 PM Amir Goldstein <amir73il@xxxxxxxxx> wrote:
> > >
> > > On Tue, Feb 4, 2020 at 6:17 PM Miklos Szeredi <miklos@xxxxxxxxxx> wrote:
> > > >
> > > > On Tue, Feb 4, 2020 at 3:59 PM Vivek Goyal <vgoyal@xxxxxxxxxx> wrote:
> > > > >
> > > > > On Fri, Jan 31, 2020 at 12:50:04PM +0100, Miklos Szeredi wrote:
> > > > > > No reason to prevent upper layer being a remote filesystem.  Do the
> > > > > > revalidation in that case, just as we already do for lower layers.
> > > > > >
> > > > > > This lets virtiofs be used as upper layer, which appears to be a real use
> > > > > > case.
> > > > >
> > > > > Hi Miklos,
> > > > >
> > > > > I have couple of very basic questions.
> > > > >
> > > > > - So with this change, we will allow NFS to be upper layer also?
> > > >
> > > > I haven't tested, but I think it will fail on the d_type test.
> > >
> > > But we do not fail mount on no d_type support...
> > > Besides, I though you were going to add the RENAME_WHITEOUT
> > > test to avert untested network fs as upper.
> > >
> >
> > Pushed strict remote upper check to:
> > https://github.com/amir73il/linux/commits/ovl-strict-upper
> >

Vivek,

Could you please make sure that the code in ovl-strict-upper branch
works as expected for virtio as upper fs?
I have rebased it on latest overlayfs-next merge into current master.

I would very much prefer that the code merged to v5.7-rc1 will be more
restrictive than the current overlayfs-next.

Thanks,
Amir.




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