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#ifndef _ASM_XEN_XENBUS_H
#define _ASM_XEN_XENBUS_H
/******************************************************************************
* xenbus.h
*
* Talks to Xen Store to figure out what devices we have.
*
* Copyright (C) 2005 Rusty Russell, IBM Corporation
*
* This file may be distributed separately from the Linux kernel, or
* incorporated into other software packages, subject to the following license:
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this source file (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy, modify,
* merge, publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include <linux/device.h>
#include <asm/semaphore.h>
/* A xenbus device. */
struct xenbus_device {
char *devicetype;
char *subtype;
char *nodename;
int id;
struct device dev;
};
static inline struct xenbus_device *to_xenbus_device(struct device *dev)
{
return container_of(dev, struct xenbus_device, dev);
}
struct xenbus_device_id
{
/* .../device/<device_type>/<identifier> */
char devicetype[32]; /* General class of device. */
char subtype[32]; /* Contents of "subtype" for this device */
};
/* A xenbus driver. */
struct xenbus_driver {
char *name;
struct module *owner;
const struct xenbus_device_id *ids;
/* Called when xenstore is connected. */
int (*connect) (struct xenbus_driver * drv);
int (*probe) (struct xenbus_device * dev, const struct xenbus_device_id * id);
int (*remove) (struct xenbus_device * dev);
int (*configure)(struct xenbus_device * dev);
struct device_driver driver;
};
struct xenbus_evtchn {
unsigned long dom1;
unsigned long port1;
unsigned long dom2;
unsigned long port2;
};
static inline struct xenbus_driver *to_xenbus_driver(struct device_driver *drv)
{
return container_of(drv, struct xenbus_driver, driver);
}
int xenbus_register_driver(struct xenbus_driver *drv);
void xenbus_unregister_driver(struct xenbus_driver *drv);
int xenbus_register_backend(struct xenbus_driver *drv);
void xenbus_unregister_backend(struct xenbus_driver *drv);
/* Iterator over xenbus devices (frontend). */
int xenbus_for_each_dev(struct xenbus_device * start, void * data,
int (*fn)(struct xenbus_device *, void *));
/* Iterator over xenbus drivers (frontend). */
int xenbus_for_each_drv(struct xenbus_driver * start, void * data,
int (*fn)(struct xenbus_driver *, void *));
/* Iterator over xenbus drivers (backend). */
int xenbus_for_each_backend(struct xenbus_driver * start, void * data,
int (*fn)(struct xenbus_driver *, void *));
/* Caller must hold this lock to call these functions. */
extern struct semaphore xs_lock;
char **xs_directory(const char *path, unsigned int *num);
void *xs_read(const char *path, unsigned int *len);
int xs_write(const char *path,
const void *data, unsigned int len, int createflags);
int xs_mkdir(const char *path);
int xs_exists(const char *path);
int xs_mkdirs(const char *path);
int xs_rm(const char *path);
int xs_transaction_start(const char *subtree);
int xs_transaction_end(int abort);
char *xs_get_domain_path(domid_t domid);
/* Register callback to watch this node. */
struct xenbus_watch
{
struct list_head list;
char *node;
unsigned int priority;
void (*callback)(struct xenbus_watch *, const char *node);
};
int register_xenbus_watch(struct xenbus_watch *watch);
void unregister_xenbus_watch(struct xenbus_watch *watch);
char *xenbus_path(const char *dir, const char *name);
char *xenbus_read(const char *dir, const char *name, unsigned int *data_n);
int xenbus_write(const char *dir, const char *name,
const char *data, int data_n);
int xenbus_read_string(const char *dir, const char *name, char **val);
int xenbus_write_string(const char *dir, const char *name, const char *val);
int xenbus_read_ulong(const char *dir, const char *name, unsigned long *val);
int xenbus_write_ulong(const char *dir, const char *name, unsigned long val);
int xenbus_read_long(const char *dir, const char *name, long *val);
int xenbus_write_long(const char *dir, const char *name, long val);
int xenbus_read_mac(const char *dir, const char *name, unsigned char mac[6]);
int xenbus_write_mac(const char *dir, const char *name, const unsigned char mac[6]);
int xenbus_read_evtchn(const char *dir, const char *name, struct xenbus_evtchn *evtchn);
int xenbus_message(const char *dir, const char *val, ...);
#endif /* _ASM_XEN_XENBUS_H */
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