/* Copied from 2.6.25 kernel headers to avoid problems on older hosts.  */

#ifndef _LINUX_LOOP_H

#define _LINUX_LOOP_H

/*

 * include/linux/loop.h

 *

 * Written by Theodore Ts'o, 3/29/93.

 *

 * Copyright 1993 by Theodore Ts'o.  Redistribution of this file is

 * permitted under the GNU General Public License.

 */

#define LO_NAME_SIZE	64

#define LO_KEY_SIZE	32

/*

 * Loop flags

 */

enum {

	LO_FLAGS_READ_ONLY	= 1,

	LO_FLAGS_USE_AOPS	= 2,

	LO_FLAGS_AUTOCLEAR	= 4,

};

#include <linux/version.h>

#include <asm/posix_types.h>	/* for __kernel_old_dev_t */

#include <asm/types.h>		/* for __u64 */

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0) /* This is a guess.  */

#define __kernel_old_dev_t __kernel_dev_t

#endif

/* Backwards compatibility version */

struct loop_info {

	int		   lo_number;		/* ioctl r/o */

	__kernel_old_dev_t lo_device; 		/* ioctl r/o */

	unsigned long	   lo_inode; 		/* ioctl r/o */

	__kernel_old_dev_t lo_rdevice; 		/* ioctl r/o */

	int		   lo_offset;

	int		   lo_encrypt_type;

	int		   lo_encrypt_key_size; 	/* ioctl w/o */

	int		   lo_flags;			/* ioctl r/o */

	char		   lo_name[LO_NAME_SIZE];

	unsigned char	   lo_encrypt_key[LO_KEY_SIZE]; /* ioctl w/o */

	unsigned long	   lo_init[2];

	char		   reserved[4];

};

struct loop_info64 {

	__u64		   lo_device;			/* ioctl r/o */

	__u64		   lo_inode;			/* ioctl r/o */

	__u64		   lo_rdevice;			/* ioctl r/o */

	__u64		   lo_offset;

	__u64		   lo_sizelimit;/* bytes, 0 == max available */

	__u32		   lo_number;			/* ioctl r/o */

	__u32		   lo_encrypt_type;

	__u32		   lo_encrypt_key_size;		/* ioctl w/o */

	__u32		   lo_flags;			/* ioctl r/o */

	__u8		   lo_file_name[LO_NAME_SIZE];

	__u8		   lo_crypt_name[LO_NAME_SIZE];

	__u8		   lo_encrypt_key[LO_KEY_SIZE]; /* ioctl w/o */

	__u64		   lo_init[2];

};

/*

 * Loop filter types

 */

#define LO_CRYPT_NONE		0

#define LO_CRYPT_XOR		1

#define LO_CRYPT_DES		2

#define LO_CRYPT_FISH2		3    /* Twofish encryption */

#define LO_CRYPT_BLOW		4

#define LO_CRYPT_CAST128	5

#define LO_CRYPT_IDEA		6

#define LO_CRYPT_DUMMY		9

#define LO_CRYPT_SKIPJACK	10

#define LO_CRYPT_CRYPTOAPI	18

#define MAX_LO_CRYPT		20

/*

 * IOCTL commands --- we will commandeer 0x4C ('L')

 */

#define LOOP_SET_FD		0x4C00

#define LOOP_CLR_FD		0x4C01

#define LOOP_SET_STATUS		0x4C02

#define LOOP_GET_STATUS		0x4C03

#define LOOP_SET_STATUS64	0x4C04

#define LOOP_GET_STATUS64	0x4C05

#define LOOP_CHANGE_FD		0x4C06

#endif