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| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2013-04-30 12:43:42 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-05-11 13:54:10 -0700 |
| commit | 76e7f478a400a76a37a05848cc2e9263e0d0cb40 (patch) | |
| tree | 69a0fbd8caa5de771223f8477f0c38c3c25efcd3 | |
| parent | 5a3f1f30a22ab33f948f0c4a6d56fc7cc5df5199 (diff) | |
| download | linux-stable-76e7f478a400a76a37a05848cc2e9263e0d0cb40.tar.gz linux-stable-76e7f478a400a76a37a05848cc2e9263e0d0cb40.tar.bz2 linux-stable-76e7f478a400a76a37a05848cc2e9263e0d0cb40.zip | |
NFSv4.x: Fix handling of partially delegated locks
commit c5a2a15f8146fdfe45078df7873a6dc1006b3869 upstream.
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>
Tested-by: Chuck Lever <Chuck.Lever@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 51d53a47a456..e3c6121bdf02 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -4513,9 +4513,9 @@ 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) |