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