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/*
* 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 inode *inode, struct file *file)
{
dnbd2_device_t *dev = inode->i_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(inode->i_bdev, DNBD2_BLOCK_SIZE)) {
up(&dev->config_mutex);
return -EBUSY;
}
atomic_inc(&dev->refcnt);
up(&dev->config_mutex);
return 0;
}
int dnbd2_release(struct inode *inode, struct file *file)
{
dnbd2_device_t *dev = inode->i_bdev->bd_disk->private_data;
if (down_interruptible(&dev->config_mutex))
return -EBUSY;
atomic_dec(&dev->refcnt);
up(&dev->config_mutex);
return 0;
}
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