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- /*
- * include/linux/loop.h
- *
- * Written by Theodore Ts'o, 3/29/93.
- *
- * Copyright 1993 by Theodore Ts'o. Redistribution of this file is
- * permitted under the GNU General Public License.
- */
- #ifndef _UAPI_LINUX_LOOP_H
- #define _UAPI_LINUX_LOOP_H
- #define LO_NAME_SIZE 64
- #define LO_KEY_SIZE 32
- /*
- * Loop flags
- */
- enum {
- LO_FLAGS_READ_ONLY = 1,
- LO_FLAGS_AUTOCLEAR = 4,
- LO_FLAGS_PARTSCAN = 8,
- LO_FLAGS_DIRECT_IO = 16,
- LO_FLAGS_BLOCKSIZE = 32,
- };
- #include <asm/posix_types.h> /* for __kernel_old_dev_t */
- #include <linux/types.h> /* for __u64 */
- /* Backwards compatibility version */
- struct loop_info {
- int lo_number; /* ioctl r/o */
- __kernel_old_dev_t lo_device; /* ioctl r/o */
- unsigned long lo_inode; /* ioctl r/o */
- __kernel_old_dev_t lo_rdevice; /* ioctl r/o */
- int lo_offset;
- int lo_encrypt_type;
- int lo_encrypt_key_size; /* ioctl w/o */
- int lo_flags; /* ioctl r/o */
- char lo_name[LO_NAME_SIZE];
- unsigned char lo_encrypt_key[LO_KEY_SIZE]; /* ioctl w/o */
- unsigned long lo_init[2];
- char reserved[4];
- };
- struct loop_info64 {
- __u64 lo_device; /* ioctl r/o */
- __u64 lo_inode; /* ioctl r/o */
- __u64 lo_rdevice; /* ioctl r/o */
- __u64 lo_offset;
- __u64 lo_sizelimit;/* bytes, 0 == max available */
- __u32 lo_number; /* ioctl r/o */
- __u32 lo_encrypt_type;
- __u32 lo_encrypt_key_size; /* ioctl w/o */
- __u32 lo_flags; /* ioctl r/o */
- __u8 lo_file_name[LO_NAME_SIZE];
- __u8 lo_crypt_name[LO_NAME_SIZE];
- __u8 lo_encrypt_key[LO_KEY_SIZE]; /* ioctl w/o */
- __u64 lo_init[2];
- };
- #define LO_INFO_BLOCKSIZE(l) (l)->lo_init[0]
- /*
- * Loop filter types
- */
- #define LO_CRYPT_NONE 0
- #define LO_CRYPT_XOR 1
- #define LO_CRYPT_DES 2
- #define LO_CRYPT_FISH2 3 /* Twofish encryption */
- #define LO_CRYPT_BLOW 4
- #define LO_CRYPT_CAST128 5
- #define LO_CRYPT_IDEA 6
- #define LO_CRYPT_DUMMY 9
- #define LO_CRYPT_SKIPJACK 10
- #define LO_CRYPT_CRYPTOAPI 18
- #define MAX_LO_CRYPT 20
- /*
- * IOCTL commands --- we will commandeer 0x4C ('L')
- */
- #define LOOP_SET_FD 0x4C00
- #define LOOP_CLR_FD 0x4C01
- #define LOOP_SET_STATUS 0x4C02
- #define LOOP_GET_STATUS 0x4C03
- #define LOOP_SET_STATUS64 0x4C04
- #define LOOP_GET_STATUS64 0x4C05
- #define LOOP_CHANGE_FD 0x4C06
- #define LOOP_SET_CAPACITY 0x4C07
- #define LOOP_SET_DIRECT_IO 0x4C08
- /* /dev/loop-control interface */
- #define LOOP_CTL_ADD 0x4C80
- #define LOOP_CTL_REMOVE 0x4C81
- #define LOOP_CTL_GET_FREE 0x4C82
- #endif /* _UAPI_LINUX_LOOP_H */
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