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| author | Andrew Patterson <andrew.patterson@hp.com> | 2008-09-04 20:27:20 (GMT) |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2008-10-09 06:56:12 (GMT) |
| commit | 0c002c2f74e10baa9021d3ecc50585c6eafea568 (patch) | |
| tree | c7d29fe0968b852f798f78bbd9231df155c56180 | |
| parent | 243294dae09c909c0442c8f04d470b69c3c19d6e (diff) | |
| download | linux-0c002c2f74e10baa9021d3ecc50585c6eafea568.tar.xz | |
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: Andrew Patterson <andrew.patterson@hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| -rw-r--r-- | fs/block_dev.c | 21 | ||||
| -rw-r--r-- | include/linux/fs.h | 1 |
2 files changed, 22 insertions, 0 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c index c3fa19b..4eeb69a 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -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 diff --git a/include/linux/fs.h b/include/linux/fs.h index 02a9fb5..d63461f 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -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); |