Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit e3264a4d authored by Hannes Reinecke's avatar Hannes Reinecke Committed by Jens Axboe
Browse files

Send uevents for write_protect changes 



Whenever a block device changes it's read-only attribute
notify the userspace about it.

Signed-off-by: default avatarHannes Reinecke <hare@suse.de>
Signed-off-by: default avatarNikanth Karthikesan <knikanth@suse.de>
Signed-off-by: default avatarJens Axboe <jens.axboe@oracle.com>
parent d58b85e1

block/genhd.c

+16 −2
Original line number Diff line number Diff line
@@ -1215,6 +1215,16 @@ void put_disk(struct gendisk *disk) 


EXPORT_SYMBOL(put_disk);



static void set_disk_ro_uevent(struct gendisk *gd, int ro)

{

	char event[] = "DISK_RO=1";

	char *envp[] = { event, NULL };



	if (!ro)

		event[8] = '0';

	kobject_uevent_env(&disk_to_dev(gd)->kobj, KOBJ_CHANGE, envp);

}



void set_device_ro(struct block_device *bdev, int flag)

{

	bdev->bd_part->policy = flag;
@@ -1227,8 +1237,12 @@ void set_disk_ro(struct gendisk *disk, int flag) 
	struct disk_part_iter piter;

	struct hd_struct *part;



	disk_part_iter_init(&piter, disk,

			    DISK_PITER_INCL_EMPTY | DISK_PITER_INCL_PART0);

	if (disk->part0.policy != flag) {

		set_disk_ro_uevent(disk, flag);

		disk->part0.policy = flag;

	}



	disk_part_iter_init(&piter, disk, DISK_PITER_INCL_EMPTY);

	while ((part = disk_part_iter_next(&piter)))

		part->policy = flag;

	disk_part_iter_exit(&piter);