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/* 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