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xenbus_comms.h
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1 /*
2  * Private include for xenbus communications.
3  *
4  * Copyright (C) 2005 Rusty Russell, IBM Corporation
5  *
6  * This program is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU General Public License version 2
8  * as published by the Free Software Foundation; or, when distributed
9  * separately from the Linux kernel or incorporated into other
10  * software packages, subject to the following license:
11  *
12  * Permission is hereby granted, free of charge, to any person obtaining a copy
13  * of this source file (the "Software"), to deal in the Software without
14  * restriction, including without limitation the rights to use, copy, modify,
15  * merge, publish, distribute, sublicense, and/or sell copies of the Software,
16  * and to permit persons to whom the Software is furnished to do so, subject to
17  * the following conditions:
18  *
19  * The above copyright notice and this permission notice shall be included in
20  * all copies or substantial portions of the Software.
21  *
22  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
23  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
24  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
25  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
26  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
27  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
28  * IN THE SOFTWARE.
29  */
30 
31 #ifndef _XENBUS_COMMS_H
32 #define _XENBUS_COMMS_H
33 
34 #include <linux/fs.h>
35 
36 int xs_init(void);
37 int xb_init_comms(void);
38 void xb_deinit_comms(void);
39 
40 /* Low level routines. */
41 int xb_write(const void *data, unsigned len);
42 int xb_read(void *data, unsigned len);
43 int xb_data_to_read(void);
44 int xb_wait_for_data_to_read(void);
45 int xs_input_avail(void);
46 extern struct xenstore_domain_interface *xen_store_interface;
47 extern int xen_store_evtchn;
48 
49 extern const struct file_operations xen_xenbus_fops;
50 
51 #endif /* _XENBUS_COMMS_H */
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