- /*
- * Device recognition functions. check_device is used to verify
- * the sense data and the information returned by read device
- * characteristics. It returns 0 if the discipline can be used
- * for the device in question.
- * do_analysis is used in the step from device state "basic" to
- * state "accept". It returns 0 if the device can be made ready,
- * it returns -EMEDIUMTYPE if the device can't be made ready or
- * -EAGAIN if do_analysis started a ccw that needs to complete
- * before the analysis may be repeated.
- */
- int (*check_device)(struct dasd_device *);
- int (*do_analysis) (struct dasd_device *);
-
- /*
- * Device operation functions. build_cp creates a ccw chain for
- * a block device request, start_io starts the request and
- * term_IO cancels it (e.g. in case of a timeout). format_device
- * returns a ccw chain to be used to format the device.
- */
+ /*
+ * Device recognition functions. check_device is used to verify
+ * the sense data and the information returned by read device
+ * characteristics. It returns 0 if the discipline can be used
+ * for the device in question. uncheck_device is called during
+ * device shutdown to deregister a device from its discipline.
+ */
+ int (*check_device) (struct dasd_device *);
+ void (*uncheck_device) (struct dasd_device *);
+
+ /*
+ * do_analysis is used in the step from device state "basic" to
+ * state "accept". It returns 0 if the device can be made ready,
+ * it returns -EMEDIUMTYPE if the device can't be made ready or
+ * -EAGAIN if do_analysis started a ccw that needs to complete
+ * before the analysis may be repeated.
+ */
+ int (*do_analysis) (struct dasd_block *);
+
+ /*
+ * Last things to do when a device is set online, and first things
+ * when it is set offline.
+ */
+ int (*ready_to_online) (struct dasd_device *);
+ int (*online_to_ready) (struct dasd_device *);
+
+ /*
+ * Device operation functions. build_cp creates a ccw chain for
+ * a block device request, start_io starts the request and
+ * term_IO cancels it (e.g. in case of a timeout). format_device
+ * returns a ccw chain to be used to format the device.
+ * handle_terminated_request allows to examine a cqr and prepare
+ * it for retry.
+ */