locks: make ->lock release private data before returning in GETLK case

The file_lock argument to ->lock is used to return the conflicting lock
when found.  There's no reason for the filesystem to return any private
information with this conflicting lock, but nfsv4 is.

Fix nfsv4 client, and modify locks.c to stop calling fl_release_private
for it in this case.

Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu>
Cc: "Trond Myklebust" <Trond.Myklebust@netapp.com>"

2 files changed, 1 insertions, 4 deletions

diff --git a/fs/locks.c b/fs/locks.c
index 957775ba6468..b07e6e6f819b 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -1665,8 +1665,6 @@ int fcntl_getlk(struct file *filp, struct flock __user *l)
 
         if (filp->f_op && filp->f_op->lock) {
                 error = filp->f_op->lock(filp, F_GETLK, &file_lock);
-                if (file_lock.fl_ops && file_lock.fl_ops->fl_release_private)
-                        file_lock.fl_ops->fl_release_private(&file_lock);
                 if (error < 0)
                         goto out;
                 else
@@ -1804,8 +1802,6 @@ int fcntl_getlk64(struct file *filp, struct flock64 __user *l)
 
         if (filp->f_op && filp->f_op->lock) {
                 error = filp->f_op->lock(filp, F_GETLK, &file_lock);
-                if (file_lock.fl_ops && file_lock.fl_ops->fl_release_private)
-                        file_lock.fl_ops->fl_release_private(&file_lock);
                 if (error < 0)
                         goto out;
                 else
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index f52cf5c33c6c..d9000ec52f72 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -3018,6 +3018,7 @@ static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock
                 case -NFS4ERR_DENIED:
                         status = 0;
         }
+        request->fl_ops->fl_release_private(request);
 out:
         up_read(&clp->cl_sem);
         return status;