1/*****************************************************************************
2 * xenbus.h
3 *
4 * Xenbus protocol details.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to
8 * deal in the Software without restriction, including without limitation the
9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
23 *
24 * Copyright (C) 2005 XenSource Ltd.
25 */
26
27#ifndef _XEN_PUBLIC_IO_XENBUS_H
28#define _XEN_PUBLIC_IO_XENBUS_H
29
30/*
31 * The state of either end of the Xenbus, i.e. the current communication
32 * status of initialisation across the bus.  States here imply nothing about
33 * the state of the connection between the driver and the kernel's device
34 * layers.
35 */
36enum xenbus_state {
37    XenbusStateUnknown       = 0,
38
39    XenbusStateInitialising  = 1,
40
41    /*
42     * InitWait: Finished early initialisation but waiting for information
43     * from the peer or hotplug scripts.
44     */
45    XenbusStateInitWait      = 2,
46
47    /*
48     * Initialised: Waiting for a connection from the peer.
49     */
50    XenbusStateInitialised   = 3,
51
52    XenbusStateConnected     = 4,
53
54    /*
55     * Closing: The device is being closed due to an error or an unplug event.
56     */
57    XenbusStateClosing       = 5,
58
59    XenbusStateClosed        = 6,
60
61    /*
62     * Reconfiguring: The device is being reconfigured.
63     */
64    XenbusStateReconfiguring = 7,
65
66    XenbusStateReconfigured  = 8
67};
68typedef enum xenbus_state XenbusState;
69
70#endif /* _XEN_PUBLIC_IO_XENBUS_H */
71
72/*
73 * Local variables:
74 * mode: C
75 * c-file-style: "BSD"
76 * c-basic-offset: 4
77 * tab-width: 4
78 * indent-tabs-mode: nil
79 * End:
80 */
81