1 /* SPDX-License-Identifier: MIT
2  *
3  * xenbus.h
4  *
5  * Xenbus protocol details.
6  *
7  * Copyright (C) 2005 XenSource Ltd.
8  */
9 
10 #ifndef _XEN_PUBLIC_IO_XENBUS_H
11 #define _XEN_PUBLIC_IO_XENBUS_H
12 
13 /*
14  * The state of either end of the Xenbus, i.e. the current communication
15  * status of initialisation across the bus.  States here imply nothing about
16  * the state of the connection between the driver and the kernel's device
17  * layers.
18  */
19 enum xenbus_state {
20 	XenbusStateUnknown       = 0,
21 
22 	XenbusStateInitialising  = 1,
23 
24 	/*
25 	 * InitWait: Finished early initialisation but waiting for information
26 	 * from the peer or hotplug scripts.
27 	 */
28 	XenbusStateInitWait      = 2,
29 
30 	/*
31 	 * Initialised: Waiting for a connection from the peer.
32 	 */
33 	XenbusStateInitialised   = 3,
34 
35 	XenbusStateConnected     = 4,
36 
37 	/*
38 	 * Closing: The device is being closed due to an error or an unplug event.
39 	 */
40 	XenbusStateClosing       = 5,
41 
42 	XenbusStateClosed        = 6,
43 
44 	/*
45 	 * Reconfiguring: The device is being reconfigured.
46 	 */
47 	XenbusStateReconfiguring = 7,
48 
49 	XenbusStateReconfigured  = 8
50 };
51 
52 typedef enum xenbus_state XenbusState;
53 
54 #endif /* _XEN_PUBLIC_IO_XENBUS_H */
55 
56 /*
57  * Local variables:
58  * mode: C
59  * c-file-style: "BSD"
60  * c-basic-offset: 4
61  * tab-width: 4
62  * indent-tabs-mode: nil
63  * End:
64  */
65