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Commit 0c002c2f authored by Andrew Patterson's avatar Andrew Patterson Committed by Jens Axboe
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Wrapper for lower-level revalidate_disk routines. 



This is a wrapper for the lower-level revalidate_disk call-backs such
as sd_revalidate_disk(). It allows us to perform pre and post
operations when calling them.

We will use this wrapper in a later patch to adjust block device sizes
after an online resize (a _post_ operation).

Signed-off-by: default avatarAndrew Patterson <andrew.patterson@hp.com>
Signed-off-by: default avatarJens Axboe <jens.axboe@oracle.com>
parent 243294da

fs/block_dev.c

+21 −0
Original line number Diff line number Diff line
@@ -852,6 +852,27 @@ struct block_device *open_by_devnum(dev_t dev, unsigned mode) 


EXPORT_SYMBOL(open_by_devnum);



/**

 * revalidate_disk - wrapper for lower-level driver's revalidate_disk

 *                   call-back

 *

 * @disk: struct gendisk to be revalidated

 *

 * This routine is a wrapper for lower-level driver's revalidate_disk

 * call-backs.  It is used to do common pre and post operations needed

 * for all revalidate_disk operations.

 */

int revalidate_disk(struct gendisk *disk)

{

	int ret = 0;



	if (disk->fops->revalidate_disk)

		ret = disk->fops->revalidate_disk(disk);



	return ret;

}

EXPORT_SYMBOL(revalidate_disk);



/*

 * This routine checks whether a removable media has been changed,

 * and invalidates all buffer-cache-entries in that case. This

include/linux/fs.h

+1 −0
Original line number Diff line number Diff line
@@ -1722,6 +1722,7 @@ extern int fs_may_remount_ro(struct super_block *); 
 */

#define bio_data_dir(bio)	((bio)->bi_rw & 1)



extern int revalidate_disk(struct gendisk *);

extern int check_disk_change(struct block_device *);

extern int __invalidate_device(struct block_device *);

extern int invalidate_partition(struct gendisk *, int);