tree cb58025cee142c158326d6c67dedb4ec9b63e32a
parent a24221dca1868101c9b4b5adde4a6a5b1a3a64a7
author Jeff Layton <jlayton@poochiereds.net> 1435162224 -0400
committer Trond Myklebust <trond.myklebust@primarydata.com> 1435275321 -0400

nfs: always update creds in mirror, even when we have an already connected ds

A ds can be associated with more than one mirror, but we currently skip
setting a mirror's credentials if we find that it's already set up with
a connected client.

The upshot is that we can end up sending DS writes with MDS credentials
instead of properly setting them up. Fix nfs4_ff_layout_prepare_ds to
always verify that the mirror's credentials are set up, even when we
have a DS that's already connected.

Reported-by: Tom Haynes <thomas.haynes@primarydata.com>
Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Cc: stable@vger.kernel.org # 4.0+
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>