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,
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