/usr/include/blktap/blktap2.h is in blktap-dev 2.0.90-4+b1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* 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:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of XenSource Inc. nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* 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,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#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
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