linux-user/linux_loop.h

   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
 100 /* /dev/loop-control interface */
 101 #define LOOP_CTL_ADD            0x4C80
 102 #define LOOP_CTL_REMOVE         0x4C81
 103 #define LOOP_CTL_GET_FREE       0x4C82
 104
 105 #endif