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#-
# Copyright (c) 2010 Spectra Logic Corporation
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions, and the following disclaimer,
# without modification.
# 2. Redistributions in binary form must reproduce at minimum a disclaimer
# substantially similar to the "NO WARRANTY" disclaimer below
# ("Disclaimer") and any redistribution must be conditioned upon
# including a substantially similar Disclaimer requirement for further
# binary redistribution.
#
# NO WARRANTY
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
# IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGES.
#
# $FreeBSD$
#
#include <sys/bus.h>
#include <sys/lock.h>
#include <sys/sx.h>
#include <sys/taskqueue.h>
#include <xen/xenstore/xenstorevar.h>
#include <xen/xenbus/xenbusb.h>
INTERFACE xenbusb;
/**
* \brief Enumerate all devices of the given type on this bus.
*
* \param _dev NewBus device_t for this XenBus (front/back) bus instance.
* \param _type String indicating the device sub-tree (e.g. "vfb", "vif")
* to enumerate.
*
* \return On success, 0. Otherwise an errno value indicating the
* type of failure.
*
* Devices that are found should be entered into the NewBus hierarchy via
* xenbusb_add_device(). xenbusb_add_device() ignores duplicate detects
* and ignores duplicate devices, so it can be called unconditionally
* for any device found in the XenStore.
*/
METHOD int enumerate_type {
device_t _dev;
const char *_type;
};
/**
* \brief Determine and store the XenStore path for the other end of
* a split device whose local end is represented by ivars.
*
* If successful, the xd_otherend_path field of the child's instance
* variables must be updated.
*
* \param _dev NewBus device_t for this XenBus (front/back) bus instance.
* \param _ivars Instance variables from the XenBus child device for
* which to perform this function.
*
* \return On success, 0. Otherwise an errno value indicating the
* type of failure.
*/
METHOD int get_otherend_node {
device_t _dev;
struct xenbus_device_ivars *_ivars;
}
/**
* \brief Handle a XenStore change detected in the peer tree of a child
* device of the bus.
*
* \param _bus NewBus device_t for this XenBus (front/back) bus instance.
* \param _child NewBus device_t for the child device whose peer XenStore
* tree has changed.
* \param _state The current state of the peer.
*/
METHOD void otherend_changed {
device_t _bus;
device_t _child;
enum xenbus_state _state;
} DEFAULT xenbusb_otherend_changed;
/**
* \brief Handle a XenStore change detected in the local tree of a child
* device of the bus.
*
* \param _bus NewBus device_t for this XenBus (front/back) bus instance.
* \param _child NewBus device_t for the child device whose peer XenStore
* tree has changed.
* \param _path The tree relative sub-path to the modified node. The empty
* string indicates the root of the tree was destroyed.
*/
METHOD void localend_changed {
device_t _bus;
device_t _child;
const char * _path;
} DEFAULT xenbusb_localend_changed;
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