NFSv4.x: Fix handling of partially delegated locks
authorTrond Myklebust <Trond.Myklebust@netapp.com>
Tue, 30 Apr 2013 16:43:42 +0000 (12:43 -0400)
committerTrond Myklebust <Trond.Myklebust@netapp.com>
Fri, 3 May 2013 16:18:47 +0000 (12:18 -0400)
commitc5a2a15f8146fdfe45078df7873a6dc1006b3869
tree6bced48c0d503130b010f20e7b043faafc383759
parent721ccfb79b6f74f4052de70236d24047e73682d4
NFSv4.x: Fix handling of partially delegated locks

If a NFS client receives a delegation for a file after it has taken
a lock on that file, we can currently end up in a situation where
we mistakenly skip unlocking that file.

The following patch swaps an erroneous check in nfs4_proc_unlck for
whether or not the file has a delegation to one which checks whether
or not we hold a lock stateid for that file.

Reported-by: Chuck Lever <Chuck.Lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@vger.kernel.org [>=3.7]
Tested-by: Chuck Lever <Chuck.Lever@oracle.com>
fs/nfs/nfs4proc.c