Leonardo Secci:
> It seems that this configuration works with NFSv4, performance are not grea=
> t=20
> but this is not the focus.
I've found a commit from v4.13,
commit 20fa19027286983ab2734b5910c4a687436e0c31
Author: Peng Tao <tao.p...@primarydata.com>
Date: Thu Jun 29 06:34:53 2017 -0700
nfs: add export operations
This support for opening files on NFS by file handle, both through the
open_by_handle syscall, and for re-exporting NFS (for example using a
different version). The support is very basic for now, as each open by
handle will have to do an NFSv4 open operation on the wire. In the
future this will hopefully be mitigated by an open file cache, as well
as various optimizations in NFS for this specific case.
Waoh, I didn't know that. But it explains your case well.
NFS client can export nfs-mount on himself, but this re-exporting is
supported by nfs4 only.
J. R. Okajima
