[mirror_ubuntu-bionic-kernel.git] / include / uapi / linux / loop.h

/* 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_LOOP_H
#define _UAPI_LINUX_LOOP_H


#define LO_NAME_SIZE	64
#define LO_KEY_SIZE	32


/*
 * Loop flags
 */
enum {
	LO_FLAGS_READ_ONLY	= 1,
	LO_FLAGS_AUTOCLEAR	= 4,
	LO_FLAGS_PARTSCAN	= 8,
	LO_FLAGS_DIRECT_IO	= 16,
};

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

/* 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
#define LOOP_SET_CAPACITY	0x4C07
#define LOOP_SET_DIRECT_IO	0x4C08
#define LOOP_SET_BLOCK_SIZE	0x4C09

/* /dev/loop-control interface */
#define LOOP_CTL_ADD		0x4C80
#define LOOP_CTL_REMOVE		0x4C81
#define LOOP_CTL_GET_FREE	0x4C82
#endif /* _UAPI_LINUX_LOOP_H */
Commit	Line	Data
e2be04c7	1	/* SPDX-License-Identifier: GPL-1.0+ WITH Linux-syscall-note */
607ca46e DH	2	/*
	3	* include/linux/loop.h
	4	*
	5	* Written by Theodore Ts'o, 3/29/93.
	6	*
	7	* Copyright 1993 by Theodore Ts'o. Redistribution of this file is
	8	* permitted under the GNU General Public License.
	9	*/
	10	#ifndef _UAPI_LINUX_LOOP_H
	11	#define _UAPI_LINUX_LOOP_H
	12
	13
	14	#define LO_NAME_SIZE 64
	15	#define LO_KEY_SIZE 32
	16
	17
	18	/*
	19	* Loop flags
	20	*/
	21	enum {
	22	LO_FLAGS_READ_ONLY = 1,
	23	LO_FLAGS_AUTOCLEAR = 4,
	24	LO_FLAGS_PARTSCAN = 8,
2e5ab5f3	25	LO_FLAGS_DIRECT_IO = 16,
607ca46e DH	26	};
	27
	28	#include <asm/posix_types.h> /* for __kernel_old_dev_t */
	29	#include <linux/types.h> /* for __u64 */
	30
	31	/* Backwards compatibility version */
	32	struct loop_info {
	33	int lo_number; /* ioctl r/o */
	34	__kernel_old_dev_t lo_device; /* ioctl r/o */
	35	unsigned long lo_inode; /* ioctl r/o */
	36	__kernel_old_dev_t lo_rdevice; /* ioctl r/o */
	37	int lo_offset;
	38	int lo_encrypt_type;
	39	int lo_encrypt_key_size; /* ioctl w/o */
	40	int lo_flags; /* ioctl r/o */
	41	char lo_name[LO_NAME_SIZE];
	42	unsigned char lo_encrypt_key[LO_KEY_SIZE]; /* ioctl w/o */
	43	unsigned long lo_init[2];
	44	char reserved[4];
	45	};
	46
	47	struct loop_info64 {
	48	__u64 lo_device; /* ioctl r/o */
	49	__u64 lo_inode; /* ioctl r/o */
	50	__u64 lo_rdevice; /* ioctl r/o */
	51	__u64 lo_offset;
	52	__u64 lo_sizelimit;/* bytes, 0 == max available */
	53	__u32 lo_number; /* ioctl r/o */
	54	__u32 lo_encrypt_type;
	55	__u32 lo_encrypt_key_size; /* ioctl w/o */
	56	__u32 lo_flags; /* ioctl r/o */
	57	__u8 lo_file_name[LO_NAME_SIZE];
	58	__u8 lo_crypt_name[LO_NAME_SIZE];
	59	__u8 lo_encrypt_key[LO_KEY_SIZE]; /* ioctl w/o */
	60	__u64 lo_init[2];
	61	};
	62
	63	/*
	64	* Loop filter types
	65	*/
	66
	67	#define LO_CRYPT_NONE 0
	68	#define LO_CRYPT_XOR 1
	69	#define LO_CRYPT_DES 2
	70	#define LO_CRYPT_FISH2 3 /* Twofish encryption */
	71	#define LO_CRYPT_BLOW 4
	72	#define LO_CRYPT_CAST128 5
	73	#define LO_CRYPT_IDEA 6
	74	#define LO_CRYPT_DUMMY 9
	75	#define LO_CRYPT_SKIPJACK 10
	76	#define LO_CRYPT_CRYPTOAPI 18
	77	#define MAX_LO_CRYPT 20
	78
	79	/*
	80	* IOCTL commands --- we will commandeer 0x4C ('L')
	81	*/
	82
	83	#define LOOP_SET_FD 0x4C00
	84	#define LOOP_CLR_FD 0x4C01
	85	#define LOOP_SET_STATUS 0x4C02
	86	#define LOOP_GET_STATUS 0x4C03
	87	#define LOOP_SET_STATUS64 0x4C04
	88	#define LOOP_GET_STATUS64 0x4C05
	89	#define LOOP_CHANGE_FD 0x4C06
90	#define LOOP_SET_CAPACITY 0x4C07
ab1cb278	91	#define LOOP_SET_DIRECT_IO 0x4C08
89e4fdec	92	#define LOOP_SET_BLOCK_SIZE 0x4C09
607ca46e DH	93
	94	/* /dev/loop-control interface */
	95	#define LOOP_CTL_ADD 0x4C80
	96	#define LOOP_CTL_REMOVE 0x4C81
	97	#define LOOP_CTL_GET_FREE 0x4C82
	98	#endif /* _UAPI_LINUX_LOOP_H */