include/hw/xen/interface/io/xenbus.h

   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 typedef enum xenbus_state XenbusState;
  52
  53 #endif /* _XEN_PUBLIC_IO_XENBUS_H */
  54
  55 /*
  56  * Local variables:
  57  * mode: C
  58  * c-file-style: "BSD"
  59  * c-basic-offset: 4
  60  * tab-width: 4
  61  * indent-tabs-mode: nil
  62  * End:
  63  */