From 931ee56c67573eb4e51c8a4e78598d965b8b059e Mon Sep 17 00:00:00 2001
From: Benny Halevy <bhalevy@primarydata.com>
Date: Fri, 30 May 2014 09:09:27 -0400
Subject: [PATCH] nfsd4: use recall_lock for delegation hashing

This fixes a bug in the handling of the fi_delegations list.

nfs4_setlease does not hold the recall_lock when adding to it. The
client_mutex is held, which prevents against concurrent list changes,
but nfsd_break_deleg_cb does not hold while walking it. New delegations
could theoretically creep onto the list while we're walking it there.

Signed-off-by: Benny Halevy <bhalevy@primarydata.com>
Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Cc: stable@vger.kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
---
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