blob: 5423987f82ad0aea1025ff35fa6c13819ce40d8f (
plain) (
tree)
|
|
/*
* kernel/fops.c
*/
#include "dnbd2.h"
#include "fops.h"
struct block_device_operations dnbd2_fops = {
.owner = THIS_MODULE,
.open = dnbd2_open,
.release = dnbd2_release,
};
int dnbd2_open(struct block_device *bdev, fmode_t mode)
{
dnbd2_device_t *dev = bdev->bd_disk->private_data;
if (down_interruptible(&dev->config_mutex))
return -EBUSY;
/* FIXME: How do we put this add/start_device? */
if (set_blocksize(bdev, DNBD2_BLOCK_SIZE)) {
up(&dev->config_mutex);
return -EBUSY;
}
atomic_inc(&dev->refcnt);
up(&dev->config_mutex);
return 0;
}
int dnbd2_release(struct gendisk *disk, fmode_t mode)
{
dnbd2_device_t *dev = disk->private_data;
if (down_interruptible(&dev->config_mutex))
return -EBUSY;
atomic_dec(&dev->refcnt);
up(&dev->config_mutex);
return 0;
}
|