LXR qemu/linux-user/linux

   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 */
  24enum {
  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 */
  39struct 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
  54struct 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
 106