diff options
Diffstat (limited to 'drivers/block/loop.c')
| -rw-r--r-- | drivers/block/loop.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/block/loop.c b/drivers/block/loop.c index fc7aefd42ae0..18a963bfffbe 100644 --- a/drivers/block/loop.c +++ b/drivers/block/loop.c @@ -738,6 +738,24 @@ out_err: return error; } +/* + * for AUFS + * no get/put for file. + */ +struct file *loop_backing_file(struct super_block *sb) +{ + struct file *ret; + struct loop_device *l; + + ret = NULL; + if (MAJOR(sb->s_dev) == LOOP_MAJOR) { + l = sb->s_bdev->bd_disk->private_data; + ret = l->lo_backing_file; + } + return ret; +} +EXPORT_SYMBOL_GPL(loop_backing_file); + /* loop sysfs attributes */ static ssize_t loop_attr_show(struct device *dev, char *page, |