Commit f059a1d2 authored by Xie Yongji's avatar Xie Yongji Committed by Jens Axboe
Browse files

block: Add invalidate_disk() helper to invalidate the gendisk 



To hide internal implementation and simplify some driver code,
this adds a helper to invalidate the gendisk. It will clean the
gendisk's associated buffer/page caches and reset its internal
states.

Signed-off-by: default avatarXie Yongji <xieyongji@bytedance.com>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20210922123711.187-2-xieyongji@bytedance.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent e94f6852

block/genhd.c

+20 −0
Original line number Diff line number Diff line
@@ -624,6 +624,26 @@ void del_gendisk(struct gendisk *disk) 
}

EXPORT_SYMBOL(del_gendisk);



/**

 * invalidate_disk - invalidate the disk

 * @disk: the struct gendisk to invalidate

 *

 * A helper to invalidates the disk. It will clean the disk's associated

 * buffer/page caches and reset its internal states so that the disk

 * can be reused by the drivers.

 *

 * Context: can sleep

 */

void invalidate_disk(struct gendisk *disk)

{

	struct block_device *bdev = disk->part0;



	invalidate_bdev(bdev);

	bdev->bd_inode->i_mapping->wb_err = 0;

	set_capacity(disk, 0);

}

EXPORT_SYMBOL(invalidate_disk);



/* sysfs access to bad-blocks list. */

static ssize_t disk_badblocks_show(struct device *dev,

					struct device_attribute *attr,

include/linux/genhd.h

+2 −0
Original line number Diff line number Diff line
@@ -213,6 +213,8 @@ static inline int add_disk(struct gendisk *disk) 
}

extern void del_gendisk(struct gendisk *gp);



void invalidate_disk(struct gendisk *disk);



void set_disk_ro(struct gendisk *disk, bool read_only);



static inline int get_disk_ro(struct gendisk *disk)