xenbus: Xen paravirtualised PCI hotplug support.
[linux-2.6.git] / include / xen / interface / io / xenbus.h
1 /*****************************************************************************
2  * xenbus.h
3  *
4  * Xenbus protocol details.
5  *
6  * Copyright (C) 2005 XenSource Ltd.
7  */
8
9 #ifndef _XEN_PUBLIC_IO_XENBUS_H
10 #define _XEN_PUBLIC_IO_XENBUS_H
11
12 /* The state of either end of the Xenbus, i.e. the current communication
13    status of initialisation across the bus.  States here imply nothing about
14    the state of the connection between the driver and the kernel's device
15    layers.  */
16 enum xenbus_state
17 {
18         XenbusStateUnknown      = 0,
19         XenbusStateInitialising = 1,
20         XenbusStateInitWait     = 2,  /* Finished early
21                                          initialisation, but waiting
22                                          for information from the peer
23                                          or hotplug scripts. */
24         XenbusStateInitialised  = 3,  /* Initialised and waiting for a
25                                          connection from the peer. */
26         XenbusStateConnected    = 4,
27         XenbusStateClosing      = 5,  /* The device is being closed
28                                          due to an error or an unplug
29                                          event. */
30         XenbusStateClosed       = 6,
31
32         /*
33         * Reconfiguring: The device is being reconfigured.
34         */
35         XenbusStateReconfiguring = 7,
36
37         XenbusStateReconfigured  = 8
38 };
39
40 #endif /* _XEN_PUBLIC_IO_XENBUS_H */
41
42 /*
43  * Local variables:
44  *  c-file-style: "linux"
45  *  indent-tabs-mode: t
46  *  c-indent-level: 8
47  *  c-basic-offset: 8
48  *  tab-width: 8
49  * End:
50  */