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