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Added flush_disk to factor out common buffer cache flushing code.

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We need to be able to flush the buffer cache for for more than
just when a disk is changed, so we factor out common cache flush code
in check_disk_change() to an internal flush_disk() routine.  This
routine will then be used for both disk changes and disk resizes (in a
later patch).

Include the disk name in the text indicating that there are busy
inodes on the device and increase the KERN severity of the message.

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 14:27:40 -06:00 committed by Jens Axboe
parent f98a8cae12
commit 56ade44b46
1 changed files with 27 additions and 5 deletions
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32
fs/block_dev.c
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@ -852,6 +852,32 @@ struct block_device *open_by_devnum(dev_t dev, unsigned mode)
EXPORT_SYMBOL(open_by_devnum);
/**
* flush_disk - invalidates all buffer-cache entries on a disk
*
* @bdev: struct block device to be flushed
*
* Invalidates all buffer-cache entries on a disk. It should be called
* when a disk has been changed -- either by a media change or online
* resize.
*/
static void flush_disk(struct block_device *bdev)
{
if (__invalidate_device(bdev)) {
char name[BDEVNAME_SIZE] = "";
if (bdev->bd_disk)
disk_name(bdev->bd_disk, 0, name);
printk(KERN_WARNING "VFS: busy inodes on changed media or "
"resized disk %s\n", name);
}
if (!bdev->bd_disk)
return;
if (disk_partitionable(bdev->bd_disk))
bdev->bd_invalidated = 1;
}
/**
* check_disk_size_change - checks for disk size change and adjusts
* bdev size.
@ -929,13 +955,9 @@ int check_disk_change(struct block_device *bdev)
if (!bdops->media_changed(bdev->bd_disk))
return 0;
if (__invalidate_device(bdev))
printk("VFS: busy inodes on changed media.\n");
flush_disk(bdev);
if (bdops->revalidate_disk)
bdops->revalidate_disk(bdev->bd_disk);
if (disk_partitionable(bdev->bd_disk))
bdev->bd_invalidated = 1;
return 1;
}