include/xen/interface/io/xenbus.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   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 /* The state of either end of the Xenbus, i.e. the current communication
  14    status of initialisation across the bus.  States here imply nothing about
  15    the state of the connection between the driver and the kernel's device
  16    layers.  */
  17 enum xenbus_state
  18 {
  19         XenbusStateUnknown      = 0,
  20         XenbusStateInitialising = 1,
  21         XenbusStateInitWait     = 2,  /* Finished early
  22                                          initialisation, but waiting
  23                                          for information from the peer
  24                                          or hotplug scripts. */
  25         XenbusStateInitialised  = 3,  /* Initialised and waiting for a
  26                                          connection from the peer. */
  27         XenbusStateConnected    = 4,
  28         XenbusStateClosing      = 5,  /* The device is being closed
  29                                          due to an error or an unplug
  30                                          event. */
  31         XenbusStateClosed       = 6,
  32
  33         /*
  34         * Reconfiguring: The device is being reconfigured.
  35         */
  36         XenbusStateReconfiguring = 7,
  37
  38         XenbusStateReconfigured  = 8
  39 };
  40
  41 #endif /* _XEN_PUBLIC_IO_XENBUS_H */
  42
  43 /*
  44  * Local variables:
  45  *  c-file-style: "linux"
  46  *  indent-tabs-mode: t
  47  *  c-indent-level: 8
  48  *  c-basic-offset: 8
  49  *  tab-width: 8
  50  * End:
  51  */