From: Trond Myklebust Date: Tue, 30 Apr 2013 16:43:42 +0000 (-0400) Subject: NFSv4.x: Fix handling of partially delegated locks X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=c5a2a15f8146fdfe45078df7873a6dc1006b3869;p=linux-beck.git 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 Signed-off-by: Trond Myklebust Cc: stable@vger.kernel.org [>=3.7] Tested-by: Chuck Lever --- 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)