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Diffstat (limited to 'tools/blktap2/include/blktap2.h')
| -rw-r--r-- | tools/blktap2/include/blktap2.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/tools/blktap2/include/blktap2.h b/tools/blktap2/include/blktap2.h new file mode 100644 index 0000000000..bf923fc08d --- /dev/null +++ b/tools/blktap2/include/blktap2.h @@ -0,0 +1,67 @@ +/* + * 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 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_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" + +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 |