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bdev: Factor out bdev revalidation into a common helper 

commit 731dc48683 upstream.

Factor out code handling revalidation of bdev on disk change into a
common helper.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Cc: Laura Abbott <labbott@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5.4-rM2-2.2.x-imx-squashed
Jan Kara 2019-10-21 10:37:59 +02:00 committed by Greg Kroah-Hartman
parent fbf86f6d5a
commit f1f3ba27c0
1 changed files with 14 additions and 12 deletions
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26
fs/block_dev.c
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@ -1512,6 +1512,14 @@ EXPORT_SYMBOL(bd_set_size);
static void __blkdev_put(struct block_device *bdev, fmode_t mode, int for_part);
static void bdev_disk_changed(struct block_device *bdev, bool invalidate)
{
if (invalidate)
invalidate_partitions(bdev->bd_disk, bdev);
else
rescan_partitions(bdev->bd_disk, bdev);
}
/*
* bd_mutex locking:
*
@ -1594,12 +1602,9 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part)
* The latter is necessary to prevent ghost
* partitions on a removed medium.
*/
if (bdev->bd_invalidated) {
if (!ret)
rescan_partitions(disk, bdev);
else if (ret == -ENOMEDIUM)
invalidate_partitions(disk, bdev);
}
if (bdev->bd_invalidated &&
(!ret || ret == -ENOMEDIUM))
bdev_disk_changed(bdev, ret == -ENOMEDIUM);
if (ret)
goto out_clear;
@ -1632,12 +1637,9 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part)
if (bdev->bd_disk->fops->open)
ret = bdev->bd_disk->fops->open(bdev, mode);
/* the same as first opener case, read comment there */
if (bdev->bd_invalidated) {
if (!ret)
rescan_partitions(bdev->bd_disk, bdev);
else if (ret == -ENOMEDIUM)
invalidate_partitions(bdev->bd_disk, bdev);
}
if (bdev->bd_invalidated &&
(!ret || ret == -ENOMEDIUM))
bdev_disk_changed(bdev, ret == -ENOMEDIUM);
if (ret)
goto out_unlock_bdev;
}