| David Howells | 607ca46 | 2012-10-13 10:46:48 +0100 | [diff] [blame] | 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 General Public License. |
| 8 | */ |
| 9 | #ifndef _UAPI_LINUX_LOOP_H |
| 10 | #define _UAPI_LINUX_LOOP_H |
| 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_AUTOCLEAR = 4, |
| 23 | LO_FLAGS_PARTSCAN = 8, |
| Ming Lei | 2e5ab5f | 2015-08-17 10:31:49 +0800 | [diff] [blame^] | 24 | LO_FLAGS_DIRECT_IO = 16, |
| David Howells | 607ca46 | 2012-10-13 10:46:48 +0100 | [diff] [blame] | 25 | }; |
| 26 | |
| 27 | #include <asm/posix_types.h> /* for __kernel_old_dev_t */ |
| 28 | #include <linux/types.h> /* for __u64 */ |
| 29 | |
| 30 | /* Backwards compatibility version */ |
| 31 | struct loop_info { |
| 32 | int lo_number; /* ioctl r/o */ |
| 33 | __kernel_old_dev_t lo_device; /* ioctl r/o */ |
| 34 | unsigned long lo_inode; /* ioctl r/o */ |
| 35 | __kernel_old_dev_t lo_rdevice; /* ioctl r/o */ |
| 36 | int lo_offset; |
| 37 | int lo_encrypt_type; |
| 38 | int lo_encrypt_key_size; /* ioctl w/o */ |
| 39 | int lo_flags; /* ioctl r/o */ |
| 40 | char lo_name[LO_NAME_SIZE]; |
| 41 | unsigned char lo_encrypt_key[LO_KEY_SIZE]; /* ioctl w/o */ |
| 42 | unsigned long lo_init[2]; |
| 43 | char reserved[4]; |
| 44 | }; |
| 45 | |
| 46 | struct loop_info64 { |
| 47 | __u64 lo_device; /* ioctl r/o */ |
| 48 | __u64 lo_inode; /* ioctl r/o */ |
| 49 | __u64 lo_rdevice; /* ioctl r/o */ |
| 50 | __u64 lo_offset; |
| 51 | __u64 lo_sizelimit;/* bytes, 0 == max available */ |
| 52 | __u32 lo_number; /* ioctl r/o */ |
| 53 | __u32 lo_encrypt_type; |
| 54 | __u32 lo_encrypt_key_size; /* ioctl w/o */ |
| 55 | __u32 lo_flags; /* ioctl r/o */ |
| 56 | __u8 lo_file_name[LO_NAME_SIZE]; |
| 57 | __u8 lo_crypt_name[LO_NAME_SIZE]; |
| 58 | __u8 lo_encrypt_key[LO_KEY_SIZE]; /* ioctl w/o */ |
| 59 | __u64 lo_init[2]; |
| 60 | }; |
| 61 | |
| 62 | /* |
| 63 | * Loop filter types |
| 64 | */ |
| 65 | |
| 66 | #define LO_CRYPT_NONE 0 |
| 67 | #define LO_CRYPT_XOR 1 |
| 68 | #define LO_CRYPT_DES 2 |
| 69 | #define LO_CRYPT_FISH2 3 /* Twofish encryption */ |
| 70 | #define LO_CRYPT_BLOW 4 |
| 71 | #define LO_CRYPT_CAST128 5 |
| 72 | #define LO_CRYPT_IDEA 6 |
| 73 | #define LO_CRYPT_DUMMY 9 |
| 74 | #define LO_CRYPT_SKIPJACK 10 |
| 75 | #define LO_CRYPT_CRYPTOAPI 18 |
| 76 | #define MAX_LO_CRYPT 20 |
| 77 | |
| 78 | /* |
| 79 | * IOCTL commands --- we will commandeer 0x4C ('L') |
| 80 | */ |
| 81 | |
| 82 | #define LOOP_SET_FD 0x4C00 |
| 83 | #define LOOP_CLR_FD 0x4C01 |
| 84 | #define LOOP_SET_STATUS 0x4C02 |
| 85 | #define LOOP_GET_STATUS 0x4C03 |
| 86 | #define LOOP_SET_STATUS64 0x4C04 |
| 87 | #define LOOP_GET_STATUS64 0x4C05 |
| 88 | #define LOOP_CHANGE_FD 0x4C06 |
| 89 | #define LOOP_SET_CAPACITY 0x4C07 |
| 90 | |
| 91 | /* /dev/loop-control interface */ |
| 92 | #define LOOP_CTL_ADD 0x4C80 |
| 93 | #define LOOP_CTL_REMOVE 0x4C81 |
| 94 | #define LOOP_CTL_GET_FREE 0x4C82 |
| 95 | #endif /* _UAPI_LINUX_LOOP_H */ |