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Wrapper for lower-level revalidate_disk routines.

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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: Andrew Patterson <andrew.patterson@hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Andrew Patterson 2008-09-04 14:27:20 -06:00 committed by Jens Axboe
parent 243294dae0
commit 0c002c2f74
2 changed files with 22 additions and 0 deletions
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21
fs/block_dev.c
View file

@ -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

1
include/linux/fs.h
View file

@ -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);