3  * Disk events - monitor disk events like media change and eject request.
17 	unsigned int		pending;	/* events already sent out */
18 	unsigned int		clearing;	/* events being cleared */
60  * @disk: disk to block events for
64  * disk_unblock_events().  Events blocking is counted and the actual
125  * @disk: disk to unblock events for
128  * starts events polling if configured.
141  * @disk: disk to check and flush events for
142  * @mask: events to flush
144  * Schedule immediate event checking on @disk if not blocked.  Events in
146  * doesn't clear the events from @disk->ev.
167  * Tell userland about new events.  Only the events listed in @disk->events are
168  * reported, and only if DISK_EVENT_FLAG_UEVENT is set.  Otherwise, events are
171 static void disk_event_uevent(struct gendisk *disk, unsigned int events)  in disk_event_uevent()  argument
177 		if (events & disk->events & (1 << i))  in disk_event_uevent()
189 	unsigned int events;  in disk_check_events()  local
192 	/* check events */  in disk_check_events()
193 	events = disk->fops->check_events(disk, clearing);  in disk_check_events()
195 	/* accumulate pending events and schedule next poll if necessary */  in disk_check_events()
198 	events &= ~ev->pending;  in disk_check_events()
199 	ev->pending |= events;  in disk_check_events()
209 	if (events & DISK_EVENT_MEDIA_CHANGE)  in disk_check_events()
213 		disk_event_uevent(disk, events);  in disk_check_events()
217  * disk_clear_events - synchronously check, clear and return pending events
218  * @disk: disk to fetch and clear events from
219  * @mask: mask of events to be fetched and cleared
221  * Disk events are synchronously checked and pending events in @mask
241 	 * can still be modified even if events are blocked).  in disk_clear_events()
255 	/* then, fetch and clear pending events */  in disk_clear_events()
277 	unsigned int events;  in bdev_check_media_change()  local
279 	events = disk_clear_events(bdev->bd_disk, DISK_EVENT_MEDIA_CHANGE |  in bdev_check_media_change()
281 	if (!(events & DISK_EVENT_MEDIA_CHANGE))  in bdev_check_media_change()
295  * @events: the events to raise
303 bool disk_force_media_change(struct gendisk *disk, unsigned int events)  in disk_force_media_change()  argument
305 	disk_event_uevent(disk, events);  in disk_force_media_change()
307 	if (!(events & DISK_EVENT_MEDIA_CHANGE))  in disk_force_media_change()
331  * A disk events enabled device has the following sysfs nodes under
334  * events		: list of all supported events
335  * events_async		: list of events which can be detected w/o polling
339 static ssize_t __disk_events_show(unsigned int events, char *buf)  in __disk_events_show()  argument
346 		if (events & (1 << i)) {  in __disk_events_show()
363 	return __disk_events_show(disk->events, buf);  in disk_events_show()
405 DEVICE_ATTR(events, 0444, disk_events_show, NULL);
451 	if (!disk->fops->check_events || !disk->events)  in disk_alloc_events()
456 		pr_warn("%s: failed to initialize events\n", disk->disk_name);  in disk_alloc_events()