find_disk_slot
if (find_disk_slot(dtls, d, &slot_node) != PICL_SUCCESS)
if (find_disk_slot(dtls, d, &node_hdl) != PICL_SUCCESS)
int find_disk_slot(led_dtls_t *dtls, int disk, picl_nodehdl_t *nodeh);
r = find_disk_slot(dtls, disk, &slotndh);
r = find_disk_slot(dtls, disk, &slotndh);