Re: [PATCH] [REGRESSION] ovl: Handle ENOSYS when fileattr support is missing in lower/upper fs

From: Jonathan Katz <jkatz@eitmlabs.org>
To: Miklos Szeredi <miklos@szeredi.hu>
Cc: "Christian Kohlschütter" <christian@kohlschutter.com>,
	"Linus Torvalds" <torvalds@linux-foundation.org>,
	overlayfs <linux-unionfs@vger.kernel.org>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	linux-fsdevel <linux-fsdevel@vger.kernel.org>
Subject: Re: [PATCH] [REGRESSION] ovl: Handle ENOSYS when fileattr support is missing in lower/upper fs
Date: Thu, 23 Feb 2023 15:11:35 -0800	[thread overview]
Message-ID: <CALKgVmdqircMjn+iEuta5a7v5rROmYGXmQ0VJtzcCQnZYbJX6w@mail.gmail.com> (raw)
In-Reply-To: <CALKgVmeaPJj4e9sYP7g+v4hZ7XaHKAm6BUNz14gvaBd=sFCs9Q@mail.gmail.com>

Hi all,

Problem persists with me with 6.2.0
# mainline --install-latest
# reboot

# uname -r
6.2.0-060200-generic

Representative log messages when mounting:
Feb 23 22:50:43 instance-20220314-1510-fileserver-for-overlay kernel:
[   44.641683] overlayfs: null uuid detected in lower fs '/', falling
back to xino=off,index=off,nfs_export=off.

Representative log messages when accessing files:
eb 23 23:06:31 instance-20220314-1510-fileserver-for-overlay kernel: [
 992.505357] overlayfs: failed to retrieve lower fileattr (8020
MeOHH2O RecoverySample2-20221219-A-JJL-WebinarHilic10C-TOF-TT54-Neg-1722.d/Storage.mcf_idx,
err=-38)
Feb 23 23:06:32 instance-20220314-1510-fileserver-for-overlay kernel:
[  993.523712] overlayfs: failed to retrieve lower fileattr (8020
MeOHH2O RecoverySample2-20221219-A-JJL-WebinarHilic10C-TOF-TT54-Neg-1722.d/Storage.mcf_idx,
err=-38)

On Mon, Jan 30, 2023 at 11:27 AM Jonathan Katz <jkatz@eitmlabs.org> wrote:
>
> On Thu, Jan 26, 2023 at 5:26 AM Miklos Szeredi <miklos@szeredi.hu> wrote:
> >
> > On Wed, 18 Jan 2023 at 04:41, Jonathan Katz <jkatz@eitmlabs.org> wrote:
> >
> > > I believe that I am still having issues occur within Ubuntu 22.10 with
> > > the 5.19 version of the kernel that might be associated with this
> > > discussion.  I apologize up front for any faux pas I make in writing
> > > this email.
> >
> > No need to apologize.   The fix in question went into v6.0 of the
> > upstream kernel.  So apparently it's still missing from the distro you
> > are using.
>
> Thank you for the reply! ---  I have upgraded the Kernel and it still
> seems to be throwing errors.  Details follow:
>
> Distro: Ubuntu 22.10.
> Upgraded kernel using mainline (mainline --install-latest)
>
> # uname -a
> Linux instance-20220314-1510-fileserver-for-overlay
> 6.1.8-060108-generic #202301240742 SMP PREEMPT_DYNAMIC Tue Jan 24
> 08:13:53 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
>
> On mount I still get the following notice in syslog (representative):
> Jan 30 19:11:46 instance-20220314-1510-fileserver-for-overlay kernel:
> [   71.613334] overlayfs: null uuid detected in lower fs '/', falling
> back to xino=off,index=off,nfs_export=off.
>
> And on access (via samba) I still see the following errors in the
> syslog (representative):
> Jan 30 19:19:34 instance-20220314-1510-fileserver-for-overlay kernel:
> [  539.181858] overlayfs: failed to retrieve lower fileattr (8020
> MeOHH2O RecoverySample2-20221219-A-JJL-WebinarHilic10C-TOF-TT54-Neg-1722.d/Storage.mcf_idx,
> err=-38)
>
> And on the Windows client, the software still fails with the same symptomology.
>
>
>
>
> >
> > > An example error from our syslog:
> > >
> > > kernel: [2702258.538549] overlayfs: failed to retrieve lower fileattr
> > > (8020 MeOHH2O
> > > RecoverySample2-20221219-A-JJL-WebinarHilic10C-TOF-TT54-Neg-1722.d/analysis.tsf,
> > > err=-38)
> >
> > Yep, looks like the same bug.
> >
> > Thanks,
> > Miklos