1/* 2 * include/linux/loop.h 3 * 4 * Written by Theodore Ts'o, 3/29/93. 5 * 6 * Copyright 1993 by Theodore Ts'o. Redistribution of this file is 7 * permitted under the GNU Public License. 8 */ 9 10#define LO_NAME_SIZE 64 11#define LO_KEY_SIZE 32 12 13struct loop_info { 14 int lo_number; /* ioctl r/o */ 15 dev_t lo_device; /* ioctl r/o */ 16 unsigned long lo_inode; /* ioctl r/o */ 17 dev_t lo_rdevice; /* ioctl r/o */ 18 int lo_offset; 19 int lo_encrypt_type; 20 int lo_encrypt_key_size; /* ioctl w/o */ 21 int lo_flags; /* ioctl r/o */ 22 char lo_name[LO_NAME_SIZE]; 23 unsigned char lo_encrypt_key[LO_KEY_SIZE]; /* ioctl w/o */ 24 unsigned long lo_init[2]; 25 char reserved[4]; 26}; 27 28#define LO_CRYPT_NONE 0 29#define LO_CRYPT_XOR 1 30#define LO_CRYPT_DES 2 31#define LO_CRYPT_IDEA 3 32#define MAX_LO_CRYPT 4 33 34#define LOOP_SET_FD 0x4C00 35#define LOOP_CLR_FD 0x4C01 36#define LOOP_SET_STATUS 0x4C02 37#define LOOP_GET_STATUS 0x4C03 38