--- old/usr/src/uts/common/fs/zfs/sys/vdev_impl.h	Mon Apr  7 00:45:26 2008
+++ new/usr/src/uts/common/fs/zfs/sys/vdev_impl.h	Mon Apr  7 00:45:26 2008
@@ -64,7 +64,8 @@
 typedef uint64_t vdev_asize_func_t(vdev_t *vd, uint64_t psize);
 typedef int	vdev_io_start_func_t(zio_t *zio);
 typedef int	vdev_io_done_func_t(zio_t *zio);
-typedef void	vdev_state_change_func_t(vdev_t *vd, int, int);
+typedef void	vdev_state_change_func_t(vdev_t *vd, int fauled, int degraded);
+typedef uint8_t	vdev_grid_func_t(vdev_t *vd);
 
 typedef struct vdev_ops {
 	vdev_open_func_t		*vdev_op_open;
@@ -74,6 +75,7 @@
 	vdev_io_start_func_t		*vdev_op_io_start;
 	vdev_io_done_func_t		*vdev_op_io_done;
 	vdev_state_change_func_t	*vdev_op_state_change;
+	vdev_grid_func_t		*vdev_op_grid;
 	char				vdev_op_type[16];
 	boolean_t			vdev_op_leaf;
 } vdev_ops_t;