include/xen/interface/io/xenbus.h

/* SPDX-License-Identifier: MIT
 *
 * xenbus.h
 *
 * Xenbus protocol details.
 *
 * Copyright (C) 2005 XenSource Ltd.
 */

#ifndef _XEN_PUBLIC_IO_XENBUS_H
#define _XEN_PUBLIC_IO_XENBUS_H

/*
 * The state of either end of the Xenbus, i.e. the current communication
 * status of initialisation across the bus.  States here imply nothing about
 * the state of the connection between the driver and the kernel's device
 * layers.
 */
enum xenbus_state {
	XenbusStateUnknown       = 0,

	XenbusStateInitialising  = 1,

	/*
	 * InitWait: Finished early initialisation but waiting for information
	 * from the peer or hotplug scripts.
	 */
	XenbusStateInitWait      = 2,

	/*
	 * Initialised: Waiting for a connection from the peer.
	 */
	XenbusStateInitialised   = 3,

	XenbusStateConnected     = 4,

	/*
	 * Closing: The device is being closed due to an error or an unplug event.
	 */
	XenbusStateClosing       = 5,

	XenbusStateClosed        = 6,

	/*
	 * Reconfiguring: The device is being reconfigured.
	 */
	XenbusStateReconfiguring = 7,

	XenbusStateReconfigured  = 8
};

typedef enum xenbus_state XenbusState;

#endif /* _XEN_PUBLIC_IO_XENBUS_H */

/*
 * Local variables:
 * mode: C
 * c-file-style: "BSD"
 * c-basic-offset: 4
 * tab-width: 4
 * indent-tabs-mode: nil
 * End:
 */