* Each group much define these ops. The fsnotify infrastructure will call
* these operations for each relevant group.
*
- * should_send_event - given a group, inode, and mask this function determines
- * if the group is interested in this event.
* handle_event - main call for a group to handle an fs event
* free_group_priv - called when a group refcnt hits 0 to clean up the private union
* freeing_mark - called when a mark is being destroyed for some reason. The group