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| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2013-04-30 12:43:42 -0400 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2013-05-03 12:18:47 -0400 |
| commit | c5a2a15f8146fdfe45078df7873a6dc1006b3869 (patch) | |
| tree | 6bced48c0d503130b010f20e7b043faafc383759 /fs/nfs | |
| parent | 721ccfb79b6f74f4052de70236d24047e73682d4 (diff) | |
| download | linux-c5a2a15f8146fdfe45078df7873a6dc1006b3869.tar.bz2 | |
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>
Diffstat (limited to 'fs/nfs')
| -rw-r--r-- | fs/nfs/nfs4proc.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 9da4bd55eb30..dc1da2adc459 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -4766,9 +4766,9 @@ static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock * if (status != 0) goto out; /* Is this a delegated lock? */ - if (test_bit(NFS_DELEGATED_STATE, &state->flags)) - goto out; lsp = request->fl_u.nfs4_fl.owner; + if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0) + goto out; seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); status = -ENOMEM; if (seqid == NULL) |