From: Jeff Layton <jlayton@primarydata.com>
Date: Wed, 30 Jul 2014 01:34:33 +0000 (-0400)
Subject: nfsd: don't allow CLOSE to proceed until refcount on stateid drops
X-Git-Tag: cleanup-for-v3.18~60^2~51
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b401be22b5cf059290ee98106bc780e087407d45;p=pandora-kernel.git

nfsd: don't allow CLOSE to proceed until refcount on stateid drops

Once we remove client_mutex protection, it'll be possible to have an
in-flight operation using an openstateid when a CLOSE call comes in.
If that happens, we can't just put the sc_file reference and clear its
pointer without risking an oops.

Fix this by ensuring that v4.0 CLOSE operations wait for the refcount
to drop before proceeding to do so.

Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
---

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