Object-specific attributes

To add a non-default attribute:

int sysfs_create_file(struct kobject *kobj, 
                      const struct attribute *attr);

The show() and store() functions are the same
Be sure they can handle the new attributes
Limits flexibility somewhat

To create a symbolic link:

int sysfs_create_link(struct kobject *kobj, 
                      struct kobject *target,
                      char *name);

Links can only be made within sysfs