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/* SPDX-License-Identifier: GPL-2.0 */
/*
* loop_file_fmt_qcow.c
*
* QCOW file format driver for the loop device module.
*
* Copyright (C) 2019 Manuel Bentele
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include "loop_file_fmt.h"
static int qcow_file_fmt_init(struct loop_file_fmt *lo_fmt)
{
printk(KERN_INFO "loop_file_fmt_qcow: init QCOW file format");
return 0;
}
static void qcow_file_fmt_exit(struct loop_file_fmt *lo_fmt)
{
printk(KERN_INFO "loop_file_fmt_qcow: exit QCOW file format");
return;
}
static int qcow_file_fmt_read(struct loop_file_fmt *lo_fmt,
struct request *rq)
{
printk(KERN_INFO "loop_file_fmt_qcow: read QCOW file format");
return 0;
}
static int qcow_file_fmt_read_aio(struct loop_file_fmt *lo_fmt,
struct request *rq)
{
printk(KERN_INFO "loop_file_fmt_qcow: read (aio) QCOW file format");
return 0;
}
static int qcow_file_fmt_write(struct loop_file_fmt *lo_fmt,
struct request *rq)
{
printk(KERN_INFO "loop_file_fmt_qcow: write QCOW file format");
return 0;
}
static int qcow_file_fmt_write_aio(struct loop_file_fmt *lo_fmt,
struct request *rq)
{
printk(KERN_INFO "loop_file_fmt_qcow: write (aio) QCOW file format");
return 0;
}
static int qcow_file_fmt_discard(struct loop_file_fmt *lo_fmt,
struct request *rq)
{
printk(KERN_INFO "loop_file_fmt_qcow: discard QCOW file format");
return 0;
}
static int qcow_file_fmt_flush(struct loop_file_fmt *lo_fmt,
struct request *rq)
{
printk(KERN_INFO "loop_file_fmt_qcow: flush QCOW file format");
return 0;
}
static struct loop_file_fmt_ops qcow_file_fmt_ops = {
.init = qcow_file_fmt_init,
.exit = qcow_file_fmt_exit,
.read = qcow_file_fmt_read,
.write = qcow_file_fmt_write,
.read_aio = qcow_file_fmt_read_aio,
.write_aio = qcow_file_fmt_write_aio,
.discard = qcow_file_fmt_discard,
.flush = qcow_file_fmt_flush
};
static struct loop_file_fmt_driver qcow_file_fmt_driver = {
.name = "QCOW",
.file_fmt_type = LO_FILE_FMT_QCOW,
.ops = &qcow_file_fmt_ops,
.owner = THIS_MODULE
};
static int __init loop_file_fmt_qcow_init(void)
{
printk(KERN_INFO "loop_file_fmt_qcow: init loop device QCOW file format driver");
return loop_file_fmt_register_driver(&qcow_file_fmt_driver);
}
static void __exit loop_file_fmt_qcow_exit(void)
{
printk(KERN_INFO "loop_file_fmt_qcow: exit loop device QCOW file format driver");
loop_file_fmt_unregister_driver(&qcow_file_fmt_driver);
}
module_init(loop_file_fmt_qcow_init);
module_exit(loop_file_fmt_qcow_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Manuel Bentele <development@manuel-bentele.de>");
MODULE_DESCRIPTION("Loop device QCOW file format driver");
MODULE_SOFTDEP("pre: loop");
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