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1/*
2 * Private include for xenbus communications.
3 *
4 * Copyright (C) 2005 Rusty Russell, IBM Corporation
5 * Copyright (C) 2005 XenSource Ltd.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License version 2
9 * as published by the Free Software Foundation; or, when distributed
10 * separately from the Linux kernel or incorporated into other
11 * software packages, subject to the following license:
12 *
13 * Permission is hereby granted, free of charge, to any person obtaining a copy
14 * of this source file (the "Software"), to deal in the Software without
15 * restriction, including without limitation the rights to use, copy, modify,
16 * merge, publish, distribute, sublicense, and/or sell copies of the Software,
17 * and to permit persons to whom the Software is furnished to do so, subject to
18 * the following conditions:
19 *
20 * The above copyright notice and this permission notice shall be included in
21 * all copies or substantial portions of the Software.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
24 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
25 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
26 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
27 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
28 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
29 * IN THE SOFTWARE.
30 */
31
32#ifndef _XENBUS_XENBUS_H
33#define _XENBUS_XENBUS_H
34
35#include <linux/mutex.h>
36#include <linux/uio.h>
37#include <xen/xenbus.h>
38
39#define XEN_BUS_ID_SIZE 20
40
41struct xen_bus_type {
42 char *root;
43 unsigned int levels;
44 int (*get_bus_id)(char bus_id[XEN_BUS_ID_SIZE], const char *nodename);
45 int (*probe)(struct xen_bus_type *bus, const char *type,
46 const char *dir);
47 bool (*otherend_will_handle)(struct xenbus_watch *watch,
48 const char *path, const char *token);
49 void (*otherend_changed)(struct xenbus_watch *watch, const char *path,
50 const char *token);
51 struct bus_type bus;
52};
53
54enum xenstore_init {
55 XS_UNKNOWN,
56 XS_PV,
57 XS_HVM,
58 XS_LOCAL,
59};
60
61struct xs_watch_event {
62 struct list_head list;
63 unsigned int len;
64 struct xenbus_watch *handle;
65 const char *path;
66 const char *token;
67 char body[];
68};
69
70enum xb_req_state {
71 xb_req_state_queued,
72 xb_req_state_wait_reply,
73 xb_req_state_got_reply,
74 xb_req_state_aborted
75};
76
77struct xb_req_data {
78 struct list_head list;
79 wait_queue_head_t wq;
80 struct xsd_sockmsg msg;
81 uint32_t caller_req_id;
82 enum xsd_sockmsg_type type;
83 char *body;
84 const struct kvec *vec;
85 int num_vecs;
86 int err;
87 enum xb_req_state state;
88 bool user_req;
89 void (*cb)(struct xb_req_data *);
90 void *par;
91};
92
93extern enum xenstore_init xen_store_domain_type;
94extern const struct attribute_group *xenbus_dev_groups[];
95extern struct mutex xs_response_mutex;
96extern struct list_head xs_reply_list;
97extern struct list_head xb_write_list;
98extern wait_queue_head_t xb_waitq;
99extern struct mutex xb_write_mutex;
100
101int xs_init(void);
102int xb_init_comms(void);
103void xb_deinit_comms(void);
104int xs_watch_msg(struct xs_watch_event *event);
105void xs_request_exit(struct xb_req_data *req);
106
107int xenbus_match(struct device *_dev, struct device_driver *_drv);
108int xenbus_dev_probe(struct device *_dev);
109void xenbus_dev_remove(struct device *_dev);
110int xenbus_register_driver_common(struct xenbus_driver *drv,
111 struct xen_bus_type *bus,
112 struct module *owner,
113 const char *mod_name);
114int xenbus_probe_node(struct xen_bus_type *bus,
115 const char *type,
116 const char *nodename);
117int xenbus_probe_devices(struct xen_bus_type *bus);
118
119void xenbus_dev_changed(const char *node, struct xen_bus_type *bus);
120
121int xenbus_dev_suspend(struct device *dev);
122int xenbus_dev_resume(struct device *dev);
123int xenbus_dev_cancel(struct device *dev);
124
125void xenbus_otherend_changed(struct xenbus_watch *watch,
126 const char *path, const char *token,
127 int ignore_on_shutdown);
128
129int xenbus_read_otherend_details(struct xenbus_device *xendev,
130 char *id_node, char *path_node);
131
132void xenbus_ring_ops_init(void);
133
134int xenbus_dev_request_and_reply(struct xsd_sockmsg *msg, void *par);
135void xenbus_dev_queue_reply(struct xb_req_data *req);
136
137extern unsigned int xb_dev_generation_id;
138
139#endif
1/*
2 * Private include for xenbus communications.
3 *
4 * Copyright (C) 2005 Rusty Russell, IBM Corporation
5 * Copyright (C) 2005 XenSource Ltd.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License version 2
9 * as published by the Free Software Foundation; or, when distributed
10 * separately from the Linux kernel or incorporated into other
11 * software packages, subject to the following license:
12 *
13 * Permission is hereby granted, free of charge, to any person obtaining a copy
14 * of this source file (the "Software"), to deal in the Software without
15 * restriction, including without limitation the rights to use, copy, modify,
16 * merge, publish, distribute, sublicense, and/or sell copies of the Software,
17 * and to permit persons to whom the Software is furnished to do so, subject to
18 * the following conditions:
19 *
20 * The above copyright notice and this permission notice shall be included in
21 * all copies or substantial portions of the Software.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
24 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
25 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
26 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
27 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
28 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
29 * IN THE SOFTWARE.
30 */
31
32#ifndef _XENBUS_XENBUS_H
33#define _XENBUS_XENBUS_H
34
35#include <linux/mutex.h>
36#include <linux/uio.h>
37#include <xen/xenbus.h>
38
39#define XEN_BUS_ID_SIZE 20
40
41struct xen_bus_type {
42 char *root;
43 unsigned int levels;
44 int (*get_bus_id)(char bus_id[XEN_BUS_ID_SIZE], const char *nodename);
45 int (*probe)(struct xen_bus_type *bus, const char *type,
46 const char *dir);
47 bool (*otherend_will_handle)(struct xenbus_watch *watch,
48 const char *path, const char *token);
49 void (*otherend_changed)(struct xenbus_watch *watch, const char *path,
50 const char *token);
51 struct bus_type bus;
52};
53
54enum xenstore_init {
55 XS_UNKNOWN,
56 XS_PV,
57 XS_HVM,
58 XS_LOCAL,
59};
60
61struct xs_watch_event {
62 struct list_head list;
63 unsigned int len;
64 struct xenbus_watch *handle;
65 const char *path;
66 const char *token;
67 char body[];
68};
69
70enum xb_req_state {
71 xb_req_state_queued,
72 xb_req_state_wait_reply,
73 xb_req_state_got_reply,
74 xb_req_state_aborted
75};
76
77struct xb_req_data {
78 struct list_head list;
79 wait_queue_head_t wq;
80 struct xsd_sockmsg msg;
81 uint32_t caller_req_id;
82 enum xsd_sockmsg_type type;
83 char *body;
84 const struct kvec *vec;
85 int num_vecs;
86 int err;
87 enum xb_req_state state;
88 bool user_req;
89 void (*cb)(struct xb_req_data *);
90 void *par;
91};
92
93extern enum xenstore_init xen_store_domain_type;
94extern const struct attribute_group *xenbus_dev_groups[];
95extern struct mutex xs_response_mutex;
96extern struct list_head xs_reply_list;
97extern struct list_head xb_write_list;
98extern wait_queue_head_t xb_waitq;
99extern struct mutex xb_write_mutex;
100
101int xs_init(void);
102int xb_init_comms(void);
103void xb_deinit_comms(void);
104int xs_watch_msg(struct xs_watch_event *event);
105void xs_request_exit(struct xb_req_data *req);
106
107int xenbus_match(struct device *_dev, const struct device_driver *_drv);
108int xenbus_dev_probe(struct device *_dev);
109void xenbus_dev_remove(struct device *_dev);
110int xenbus_register_driver_common(struct xenbus_driver *drv,
111 struct xen_bus_type *bus,
112 struct module *owner,
113 const char *mod_name);
114int xenbus_probe_node(struct xen_bus_type *bus,
115 const char *type,
116 const char *nodename);
117int xenbus_probe_devices(struct xen_bus_type *bus);
118
119void xenbus_dev_changed(const char *node, struct xen_bus_type *bus);
120
121int xenbus_dev_suspend(struct device *dev);
122int xenbus_dev_resume(struct device *dev);
123int xenbus_dev_cancel(struct device *dev);
124
125void xenbus_otherend_changed(struct xenbus_watch *watch,
126 const char *path, const char *token,
127 int ignore_on_shutdown);
128
129int xenbus_read_otherend_details(struct xenbus_device *xendev,
130 char *id_node, char *path_node);
131
132void xenbus_ring_ops_init(void);
133
134int xenbus_dev_request_and_reply(struct xsd_sockmsg *msg, void *par);
135void xenbus_dev_queue_reply(struct xb_req_data *req);
136
137extern unsigned int xb_dev_generation_id;
138
139#endif