nfs: set FILE_CREATED

Set FILE_CREATED on O_CREAT|O_EXCL.  If the NFS server honored our request
for exclusivity then this must be correct.

Currently this is a no-op, since the VFS sets FILE_CREATED anyway.  The
next patch will, however, require this flag to be always set by
filesystems.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/nfs/dir.c

@@ -1392,6 +1392,9 @@ static int nfs_finish_open(struct nfs_open_context *ctx,
 {
 	int err;
 
+	if ((open_flags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
+		*opened |= FILE_CREATED;
+
 	err = finish_open(file, dentry, do_open, opened);
 	if (err)
 		goto out;