overlayfs (3.18-rc2): NFS completely unsupported?

overlayfs (3.18-rc2): NFS completely unsupported?

[Sven Geggus]

Hello,

I'm testing overlayfs in kernel 3.18-rc2 because I hoped to be able to
replace aufs and would be able to return to mainline kernels in future.

overlayfs documentation states, that NFS is unsupported in "upper
filesystem", but I do not manage to make it work with a ro NFS lowerdir as
well. All I get is:

overlayfs: filesystem of lowerdir is not supported

This is what I try:
mount -t overlayfs -olowerdir=/etc,upperdir=/local/etc,workdir=/local/ovldir overlayfs /mnt

/local is tmpfs in this case.

If this is _not_ supposed to work I would strongly suggest, to clarify NFS
support in Documentation/filesystems/overlayfs.txt

Regards

Sven

-- 
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