1 /* Copied from 2.6.25 kernel headers to avoid problems on older hosts. */ 2 3 #ifndef LINUX_LOOP_H 4 #define LINUX_LOOP_H 5 6 /* 7 * include/linux/loop.h 8 * 9 * Written by Theodore Ts'o, 3/29/93. 10 * 11 * Copyright 1993 by Theodore Ts'o. Redistribution of this file is 12 * permitted under the GNU General Public License. 13 */ 14 15 #define LO_NAME_SIZE 64 16 #define LO_KEY_SIZE 32 17 18 19 /* 20 * Loop flags 21 */ 22 enum { 23 LO_FLAGS_READ_ONLY = 1, 24 LO_FLAGS_USE_AOPS = 2, 25 LO_FLAGS_AUTOCLEAR = 4, 26 }; 27 28 #include <linux/version.h> 29 #include <asm/posix_types.h> /* for __kernel_old_dev_t */ 30 #include <asm/types.h> /* for __u64 */ 31 32 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0) /* This is a guess. */ 33 #define __kernel_old_dev_t __kernel_dev_t 34 #endif 35 36 /* Backwards compatibility version */ 37 struct loop_info { 38 int lo_number; /* ioctl r/o */ 39 __kernel_old_dev_t lo_device; /* ioctl r/o */ 40 unsigned long lo_inode; /* ioctl r/o */ 41 __kernel_old_dev_t lo_rdevice; /* ioctl r/o */ 42 int lo_offset; 43 int lo_encrypt_type; 44 int lo_encrypt_key_size; /* ioctl w/o */ 45 int lo_flags; /* ioctl r/o */ 46 char lo_name[LO_NAME_SIZE]; 47 unsigned char lo_encrypt_key[LO_KEY_SIZE]; /* ioctl w/o */ 48 unsigned long lo_init[2]; 49 char reserved[4]; 50 }; 51 52 struct loop_info64 { 53 __u64 lo_device; /* ioctl r/o */ 54 __u64 lo_inode; /* ioctl r/o */ 55 __u64 lo_rdevice; /* ioctl r/o */ 56 __u64 lo_offset; 57 __u64 lo_sizelimit;/* bytes, 0 == max available */ 58 __u32 lo_number; /* ioctl r/o */ 59 __u32 lo_encrypt_type; 60 __u32 lo_encrypt_key_size; /* ioctl w/o */ 61 __u32 lo_flags; /* ioctl r/o */ 62 __u8 lo_file_name[LO_NAME_SIZE]; 63 __u8 lo_crypt_name[LO_NAME_SIZE]; 64 __u8 lo_encrypt_key[LO_KEY_SIZE]; /* ioctl w/o */ 65 __u64 lo_init[2]; 66 }; 67 68 /* 69 * Loop filter types 70 */ 71 72 #define LO_CRYPT_NONE 0 73 #define LO_CRYPT_XOR 1 74 #define LO_CRYPT_DES 2 75 #define LO_CRYPT_FISH2 3 /* Twofish encryption */ 76 #define LO_CRYPT_BLOW 4 77 #define LO_CRYPT_CAST128 5 78 #define LO_CRYPT_IDEA 6 79 #define LO_CRYPT_DUMMY 9 80 #define LO_CRYPT_SKIPJACK 10 81 #define LO_CRYPT_CRYPTOAPI 18 82 #define MAX_LO_CRYPT 20 83 84 /* 85 * IOCTL commands --- we will commandeer 0x4C ('L') 86 */ 87 88 #define LOOP_SET_FD 0x4C00 89 #define LOOP_CLR_FD 0x4C01 90 #define LOOP_SET_STATUS 0x4C02 91 #define LOOP_GET_STATUS 0x4C03 92 #define LOOP_SET_STATUS64 0x4C04 93 #define LOOP_GET_STATUS64 0x4C05 94 #define LOOP_CHANGE_FD 0x4C06 95 96 #endif 97