Yes, you'd have to apply the patch to that kernel yourself. No RHEL7
kernels have that patch (so far). Newer RHEL8 kernels _do_ if that's an
option for you.
-- Jeff
On Mon, 2020-11-09 at 19:21 +0100, Frédéric Nass wrote:
> I feel lucky to have you on this one. ;-) Do you mean applying a
> specific patch on 3.10 kernel? Or is this one too old to have it working
> anyways.
>
> Frédéric.
>
> Le 09/11/2020 à 19:07, Luis Henriques a écrit :
> > Frédéric Nass <frederic.nass@xxxxxxxxxxxxxxxx> writes:
> >
> > > Hi Luis,
> > >
> > > Thanks for your help. Sorry I forgot about the kernel details. This is latest
> > > RHEL 7.9.
> > >
> > > ~/ uname -r
> > > 3.10.0-1160.2.2.el7.x86_64
> > >
> > > ~/ grep CONFIG_TMPFS_XATTR /boot/config-3.10.0-1160.2.2.el7.x86_64
> > > CONFIG_TMPFS_XATTR=y
> > >
> > > upper directory /upperdir is using xattrs
> > >
> > > ~/ ls -l /dev/mapper/vg0-racine
> > > lrwxrwxrwx 1 root root 7 6 mars 2020 /dev/mapper/vg0-racine -> ../dm-0
> > >
> > > ~/ cat /proc/fs/ext4/dm-0/options | grep xattr
> > > user_xattr
> > >
> > > ~/ setfattr -n user.name -v upperdir /upperdir
> > >
> > > ~/ getfattr -n user.name /upperdir
> > > getfattr: Suppression des « / » en tête des chemins absolus
> > > # file: upperdir
> > > user.name="upperdir"
> > >
> > > Are you able to modify the content of a snapshot directory using overlayfs on
> > > your side?
> > [ Cc'ing Jeff ]
> >
> > Yes, I'm able to do that using a *recent* kernel. I got curious and after
> > some digging I managed to reproduce the issue with kernel 5.3. The
> > culprit was commit e09580b343aa ("ceph: don't list vxattrs in
> > listxattr()"), in 5.4.
> >
> > Getting a bit more into the whole rabbit hole, it looks like
> > ovl_copy_xattr() will try to copy all the ceph-related vxattrs. And that
> > won't work (for ex. for ceph.dir.entries).
> >
> > Can you try cherry-picking this commit into your kernel to see if that
> > fixes it for you?
> >
> > Cheers,
--
Jeff Layton <jlayton@xxxxxxxxxx>
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