Archipelago » blktap-utils

/*

 * Copyright (c) 2008, XenSource Inc.

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are met:

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 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER

 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

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 */

#ifndef _BLKTAP_2_H_

#define _BLKTAP_2_H_

#define MISC_MAJOR_NUMBER              10

#define BLKTAP2_MAX_MESSAGE_LEN        256

#define BLKTAP2_RING_MESSAGE_PAUSE     1

#define BLKTAP2_RING_MESSAGE_RESUME    2

#define BLKTAP2_RING_MESSAGE_CLOSE     3

#define BLKTAP2_IOCTL_KICK_FE          1

#define BLKTAP2_IOCTL_ALLOC_TAP        200

#define BLKTAP2_IOCTL_FREE_TAP         201

#define BLKTAP2_IOCTL_CREATE_DEVICE    202

#define BLKTAP2_IOCTL_SET_PARAMS       203

#define BLKTAP2_IOCTL_PAUSE            204

#define BLKTAP2_IOCTL_REOPEN           205

#define BLKTAP2_IOCTL_RESUME           206

#define BLKTAP2_IOCTL_REMOVE_DEVICE    207

#define BLKTAP2_SYSFS_DIR              "/sys/class/blktap2"

#define BLKTAP2_CONTROL_NAME           "blktap-control"

#define BLKTAP2_CONTROL_DIR            "/var/run/"BLKTAP2_CONTROL_NAME

#define BLKTAP2_CONTROL_SOCKET         "ctl"

#define BLKTAP2_DIRECTORY              "/dev/xen/blktap-2"

#define BLKTAP2_CONTROL_DEVICE         BLKTAP2_DIRECTORY"/control"

#define BLKTAP2_RING_DEVICE            BLKTAP2_DIRECTORY"/blktap"

#define BLKTAP2_IO_DEVICE              BLKTAP2_DIRECTORY"/tapdev"

#define BLKTAP2_ENOSPC_SIGNAL_FILE     "/var/run/tapdisk-enospc"

struct blktap2_handle {

        unsigned int                   ring;

        unsigned int                   device;

        unsigned int                   minor;

};

struct blktap2_params {

        char                           name[BLKTAP2_MAX_MESSAGE_LEN];

        unsigned long long             capacity;

        unsigned long                  sector_size;

};

#endif