1 /* Copied from 2.6.25 kernel headers to avoid problems on older hosts, 2 * and subsequently updated to match newer additions to the API. 3 */ 4 5 #ifndef LINUX_LOOP_H 6 #define LINUX_LOOP_H 7 8 /* 9 * include/linux/loop.h 10 * 11 * Written by Theodore Ts'o, 3/29/93. 12 * 13 * Copyright 1993 by Theodore Ts'o. Redistribution of this file is 14 * permitted under the GNU General Public License. 15 */ 16 17 #define LO_NAME_SIZE 64 18 #define LO_KEY_SIZE 32 19 20 21 /* 22 * Loop flags 23 */ 24 enum { 25 LO_FLAGS_READ_ONLY = 1, 26 LO_FLAGS_USE_AOPS = 2, 27 LO_FLAGS_AUTOCLEAR = 4, 28 }; 29 30 #include <linux/version.h> 31 #include <asm/posix_types.h> /* for __kernel_old_dev_t */ 32 #include <asm/types.h> /* for __u64 */ 33 34 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0) /* This is a guess. */ 35 #define __kernel_old_dev_t __kernel_dev_t 36 #endif 37 38 /* Backwards compatibility version */ 39 struct loop_info { 40 int lo_number; /* ioctl r/o */ 41 __kernel_old_dev_t lo_device; /* ioctl r/o */ 42 unsigned long lo_inode; /* ioctl r/o */ 43 __kernel_old_dev_t lo_rdevice; /* ioctl r/o */ 44 int lo_offset; 45 int lo_encrypt_type; 46 int lo_encrypt_key_size; /* ioctl w/o */ 47 int lo_flags; /* ioctl r/o */ 48 char lo_name[LO_NAME_SIZE]; 49 unsigned char lo_encrypt_key[LO_KEY_SIZE]; /* ioctl w/o */ 50 unsigned long lo_init[2]; 51 char reserved[4]; 52 }; 53 54 struct loop_info64 { 55 __u64 lo_device; /* ioctl r/o */ 56 __u64 lo_inode; /* ioctl r/o */ 57 __u64 lo_rdevice; /* ioctl r/o */ 58 __u64 lo_offset; 59 __u64 lo_sizelimit;/* bytes, 0 == max available */ 60 __u32 lo_number; /* ioctl r/o */ 61 __u32 lo_encrypt_type; 62 __u32 lo_encrypt_key_size; /* ioctl w/o */ 63 __u32 lo_flags; /* ioctl r/o */ 64 __u8 lo_file_name[LO_NAME_SIZE]; 65 __u8 lo_crypt_name[LO_NAME_SIZE]; 66 __u8 lo_encrypt_key[LO_KEY_SIZE]; /* ioctl w/o */ 67 __u64 lo_init[2]; 68 }; 69 70 /* 71 * Loop filter types 72 */ 73 74 #define LO_CRYPT_NONE 0 75 #define LO_CRYPT_XOR 1 76 #define LO_CRYPT_DES 2 77 #define LO_CRYPT_FISH2 3 /* Twofish encryption */ 78 #define LO_CRYPT_BLOW 4 79 #define LO_CRYPT_CAST128 5 80 #define LO_CRYPT_IDEA 6 81 #define LO_CRYPT_DUMMY 9 82 #define LO_CRYPT_SKIPJACK 10 83 #define LO_CRYPT_CRYPTOAPI 18 84 #define MAX_LO_CRYPT 20 85 86 /* 87 * IOCTL commands --- we will commandeer 0x4C ('L') 88 */ 89 90 #define LOOP_SET_FD 0x4C00 91 #define LOOP_CLR_FD 0x4C01 92 #define LOOP_SET_STATUS 0x4C02 93 #define LOOP_GET_STATUS 0x4C03 94 #define LOOP_SET_STATUS64 0x4C04 95 #define LOOP_GET_STATUS64 0x4C05 96 #define LOOP_CHANGE_FD 0x4C06 97 #define LOOP_SET_CAPACITY 0x4C07 98 #define LOOP_SET_DIRECT_IO 0x4C08 99 #define LOOP_SET_BLOCK_SIZE 0x4C09 100 #define LOOP_CONFIGURE 0x4C0A 101 102 /* /dev/loop-control interface */ 103 #define LOOP_CTL_ADD 0x4C80 104 #define LOOP_CTL_REMOVE 0x4C81 105 #define LOOP_CTL_GET_FREE 0x4C82 106 107 #endif 108