[PATCH v7 09/12] xfs: wire up ->lease_direct()

@@ -1166,6 +1166,33 @@ xfs_filemap_direct_close(
 	put_map_direct_vma(vma->vm_private_data);
 }
 
+static struct lease_direct *
+xfs_filemap_direct_lease(
+	struct vm_area_struct	*vma,
+	void			(*break_fn)(void *),
+	void			*owner)
+{
+	struct lease_direct	*ld;
+
+	ld = map_direct_lease(vma, break_fn, owner);
+
+	if (IS_ERR(ld))
+		return ld;
+
+	/*
+	 * We now have an established lease while the base MAP_DIRECT
+	 * lease was not broken. So, we know that the "lease holder" will
+	 * receive a SIGIO notification when the lease is broken and
+	 * take any necessary cleanup actions.
+	 */
+	if (!is_map_direct_broken(vma->vm_private_data))
+		return ld;
+
+	map_direct_lease_destroy(ld);
+
+	return ERR_PTR(-ENXIO);
+}
+
 static const struct vm_operations_struct xfs_file_vm_direct_ops = {
 	.fault		= xfs_filemap_fault,
 	.huge_fault	= xfs_filemap_huge_fault,

@@ -1175,6 +1202,7 @@ static const struct vm_operations_struct xfs_file_vm_direct_ops = {
 
 	.open		= xfs_filemap_direct_open,
 	.close		= xfs_filemap_direct_close,
+	.lease_direct	= xfs_filemap_direct_lease,
 };
 
 static const struct vm_operations_struct xfs_file_vm_ops = {

--