forked from mirrors/linux
c23d47abee
Just leave the SPDX marker and the copyright notice and remove the irrelevant rest. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20220419063303.583106-5-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
120 lines
3.3 KiB
C
120 lines
3.3 KiB
C
/* SPDX-License-Identifier: GPL-1.0+ WITH Linux-syscall-note */
|
|
/*
|
|
* Copyright 1993 by Theodore Ts'o.
|
|
*/
|
|
#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,
|
|
};
|
|
|
|
/* LO_FLAGS that can be set using LOOP_SET_STATUS(64) */
|
|
#define LOOP_SET_STATUS_SETTABLE_FLAGS (LO_FLAGS_AUTOCLEAR | LO_FLAGS_PARTSCAN)
|
|
|
|
/* LO_FLAGS that can be cleared using LOOP_SET_STATUS(64) */
|
|
#define LOOP_SET_STATUS_CLEARABLE_FLAGS (LO_FLAGS_AUTOCLEAR)
|
|
|
|
/* LO_FLAGS that can be set using LOOP_CONFIGURE */
|
|
#define LOOP_CONFIGURE_SETTABLE_FLAGS (LO_FLAGS_READ_ONLY | LO_FLAGS_AUTOCLEAR \
|
|
| LO_FLAGS_PARTSCAN | LO_FLAGS_DIRECT_IO)
|
|
|
|
#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; /* obsolete, ignored */
|
|
int lo_encrypt_key_size; /* ioctl w/o */
|
|
int lo_flags;
|
|
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; /* obsolete, ignored */
|
|
__u32 lo_encrypt_key_size; /* ioctl w/o */
|
|
__u32 lo_flags;
|
|
__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];
|
|
};
|
|
|
|
/**
|
|
* struct loop_config - Complete configuration for a loop device.
|
|
* @fd: fd of the file to be used as a backing file for the loop device.
|
|
* @block_size: block size to use; ignored if 0.
|
|
* @info: struct loop_info64 to configure the loop device with.
|
|
*
|
|
* This structure is used with the LOOP_CONFIGURE ioctl, and can be used to
|
|
* atomically setup and configure all loop device parameters at once.
|
|
*/
|
|
struct loop_config {
|
|
__u32 fd;
|
|
__u32 block_size;
|
|
struct loop_info64 info;
|
|
__u64 __reserved[8];
|
|
};
|
|
|
|
/*
|
|
* 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
|
|
#define LOOP_CONFIGURE 0x4C0A
|
|
|
|
/* /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 */
|