4bac07c993
This communicates with the machine control software via a registry residing in a controlling virtual machine. This allows dynamic creation, destruction and modification of virtual device configurations (network devices, block devices and CPUS, to name some examples). [ Greg, would you mind giving this a review? Thanks -J ] Signed-off-by: Ian Pratt <ian.pratt@xensource.com> Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk> Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Chris Wright <chrisw@sous-sol.org> Cc: Greg KH <greg@kroah.com>
75 lines
3.1 KiB
C
75 lines
3.1 KiB
C
/******************************************************************************
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* xenbus_probe.h
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*
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* Talks to Xen Store to figure out what devices we have.
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*
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* Copyright (C) 2005 Rusty Russell, IBM Corporation
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* Copyright (C) 2005 XenSource Ltd.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation; or, when distributed
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* separately from the Linux kernel or incorporated into other
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* software packages, subject to the following license:
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this source file (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy, modify,
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* merge, publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#ifndef _XENBUS_PROBE_H
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#define _XENBUS_PROBE_H
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#ifdef CONFIG_XEN_BACKEND
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extern void xenbus_backend_suspend(int (*fn)(struct device *, void *));
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extern void xenbus_backend_resume(int (*fn)(struct device *, void *));
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extern void xenbus_backend_probe_and_watch(void);
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extern int xenbus_backend_bus_register(void);
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extern void xenbus_backend_bus_unregister(void);
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#else
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static inline void xenbus_backend_suspend(int (*fn)(struct device *, void *)) {}
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static inline void xenbus_backend_resume(int (*fn)(struct device *, void *)) {}
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static inline void xenbus_backend_probe_and_watch(void) {}
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static inline int xenbus_backend_bus_register(void) { return 0; }
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static inline void xenbus_backend_bus_unregister(void) {}
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#endif
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struct xen_bus_type
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{
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char *root;
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unsigned int levels;
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int (*get_bus_id)(char bus_id[BUS_ID_SIZE], const char *nodename);
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int (*probe)(const char *type, const char *dir);
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struct bus_type bus;
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};
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extern int xenbus_match(struct device *_dev, struct device_driver *_drv);
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extern int xenbus_dev_probe(struct device *_dev);
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extern int xenbus_dev_remove(struct device *_dev);
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extern int xenbus_register_driver_common(struct xenbus_driver *drv,
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struct xen_bus_type *bus,
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struct module *owner,
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const char *mod_name);
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extern int xenbus_probe_node(struct xen_bus_type *bus,
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const char *type,
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const char *nodename);
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extern int xenbus_probe_devices(struct xen_bus_type *bus);
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extern void xenbus_dev_changed(const char *node, struct xen_bus_type *bus);
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#endif
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