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/* SPDX-License-Identifier: GPL-1.0+ WITH Linux-syscall-note */
/*
* 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.
*/
#ifndef _UAPI_LINUX_XLOOP_H
#define _UAPI_LINUX_XLOOP_H
#define XLO_NAME_SIZE 64
#define XLO_KEY_SIZE 32
/*
* xloop flags
*/
enum {
XLO_FLAGS_READ_ONLY = 1,
XLO_FLAGS_AUTOCLEAR = 4,
XLO_FLAGS_PARTSCAN = 8,
XLO_FLAGS_DIRECT_IO = 16,
};
/* XLO_FLAGS that can be set using XLOOP_SET_STATUS(64) */
#define XLOOP_SET_STATUS_SETTABLE_FLAGS (XLO_FLAGS_AUTOCLEAR | XLO_FLAGS_PARTSCAN)
/* XLO_FLAGS that can be cleared using XLOOP_SET_STATUS(64) */
#define XLOOP_SET_STATUS_CLEARABLE_FLAGS (XLO_FLAGS_AUTOCLEAR)
/* XLO_FLAGS that can be set using XLOOP_CONFIGURE */
#define XLOOP_CONFIGURE_SETTABLE_FLAGS (XLO_FLAGS_READ_ONLY | XLO_FLAGS_AUTOCLEAR \
| XLO_FLAGS_PARTSCAN | XLO_FLAGS_DIRECT_IO)
#include <asm/posix_types.h> /* for __kernel_old_dev_t */
#include <linux/types.h> /* for __u64 */
/* Backwards compatibility version */
struct xloop_info {
int xlo_number; /* ioctl r/o */
__kernel_old_dev_t xlo_device; /* ioctl r/o */
unsigned long xlo_inode; /* ioctl r/o */
__kernel_old_dev_t xlo_rdevice; /* ioctl r/o */
int xlo_offset;
int xlo_encrypt_type;
int xlo_encrypt_key_size; /* ioctl w/o */
int xlo_flags;
char xlo_name[XLO_NAME_SIZE];
unsigned char xlo_encrypt_key[XLO_KEY_SIZE]; /* ioctl w/o */
unsigned long xlo_init[2];
char reserved[4];
int xlo_file_fmt_type;
};
struct xloop_info64 {
__u64 xlo_device; /* ioctl r/o */
__u64 xlo_inode; /* ioctl r/o */
__u64 xlo_rdevice; /* ioctl r/o */
__u64 xlo_offset;
__u64 xlo_sizelimit; /* bytes, 0 == max available */
__u32 xlo_number; /* ioctl r/o */
__u32 xlo_encrypt_type;
__u32 xlo_encrypt_key_size; /* ioctl w/o */
__u32 xlo_flags;
__u8 xlo_file_name[XLO_NAME_SIZE];
__u8 xlo_crypt_name[XLO_NAME_SIZE];
__u8 xlo_encrypt_key[XLO_KEY_SIZE]; /* ioctl w/o */
__u64 xlo_init[2];
__u32 xlo_file_fmt_type;
};
/**
* struct xloop_config - Complete configuration for a xloop device.
* @fd: fd of the file to be used as a backing file for the xloop device.
* @block_size: block size to use; ignored if 0.
* @info: struct xloop_info64 to configure the xloop device with.
*
* This structure is used with the XLOOP_CONFIGURE ioctl, and can be used to
* atomically setup and configure all xloop device parameters at once.
*/
struct xloop_config {
__u32 fd;
__u32 block_size;
struct xloop_info64 info;
__u64 __reserved[8];
};
/*
* xloop filter types
*/
#define XLO_CRYPT_NONE 0
#define XLO_CRYPT_XOR 1
#define XLO_CRYPT_DES 2
#define XLO_CRYPT_FISH2 3 /* Twofish encryption */
#define XLO_CRYPT_BLOW 4
#define XLO_CRYPT_CAST128 5
#define XLO_CRYPT_IDEA 6
#define XLO_CRYPT_DUMMY 9
#define XLO_CRYPT_SKIPJACK 10
#define XLO_CRYPT_CRYPTOAPI 18
#define MAX_XLO_CRYPT 20
/*
* IOCTL commands --- we will commandeer 0x4C ('L')
*/
#define XLOOP_SET_FD 0x4C00
#define XLOOP_CLR_FD 0x4C01
#define XLOOP_SET_STATUS 0x4C02
#define XLOOP_GET_STATUS 0x4C03
#define XLOOP_SET_STATUS64 0x4C04
#define XLOOP_GET_STATUS64 0x4C05
#define XLOOP_CHANGE_FD 0x4C06
#define XLOOP_SET_CAPACITY 0x4C07
#define XLOOP_SET_DIRECT_IO 0x4C08
#define XLOOP_SET_BLOCK_SIZE 0x4C09
#define XLOOP_CONFIGURE 0x4C0A
/* /dev/xloop-control interface */
#define XLOOP_CTL_ADD 0x4C80
#define XLOOP_CTL_REMOVE 0x4C81
#define XLOOP_CTL_GET_FREE 0x4C82
#endif /* _UAPI_LINUX_XLOOP_H */
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