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Evgeniy Polyakov7672d0b2005-09-11 19:15:07 -07001/*
2 * connector.h
3 *
4 * 2004-2005 Copyright (c) Evgeniy Polyakov <johnpol@2ka.mipt.ru>
5 * All rights reserved.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22#ifndef __CONNECTOR_H
23#define __CONNECTOR_H
24
25#include <asm/types.h>
26
27#define CN_IDX_CONNECTOR 0xffffffff
28#define CN_VAL_CONNECTOR 0xffffffff
29
Matt Helsley9f460802005-11-07 00:59:16 -080030/*
31 * Process Events connector unique ids -- used for message routing
32 */
33#define CN_IDX_PROC 0x1
34#define CN_VAL_PROC 0x1
Steve Frencha2653eb2005-11-10 15:33:38 -080035#define CN_IDX_CIFS 0x2
36#define CN_VAL_CIFS 0x1
Evgeniy Polyakovb6043fc2006-03-23 19:11:58 +030037#define CN_W1_IDX 0x3 /* w1 communication */
38#define CN_W1_VAL 0x1
Michal Januszewskicc54f462007-10-16 01:28:25 -070039#define CN_IDX_V86D 0x4
40#define CN_VAL_V86D_UVESAFB 0x1
Jerome Arbez-Gindre2c203002008-07-29 22:33:33 -070041#define CN_IDX_BB 0x5 /* BlackBoard, from the TSP GPL sampling framework */
Matt Helsley9f460802005-11-07 00:59:16 -080042
Jerome Arbez-Gindre2c203002008-07-29 22:33:33 -070043#define CN_NETLINK_USERS 6
Evgeniy Polyakov7672d0b2005-09-11 19:15:07 -070044
45/*
46 * Maximum connector's message size.
47 */
Michal Januszewski3d62a442007-10-16 01:28:24 -070048#define CONNECTOR_MAX_MSG_SIZE 16384
Evgeniy Polyakov7672d0b2005-09-11 19:15:07 -070049
50/*
51 * idx and val are unique identifiers which
52 * are used for message routing and
53 * must be registered in connector.h for in-kernel usage.
54 */
55
56struct cb_id {
57 __u32 idx;
58 __u32 val;
59};
60
61struct cn_msg {
62 struct cb_id id;
63
64 __u32 seq;
65 __u32 ack;
66
67 __u16 len; /* Length of the following data */
68 __u16 flags;
69 __u8 data[0];
70};
71
72/*
73 * Notify structure - requests notification about
74 * registering/unregistering idx/val in range [first, first+range].
75 */
76struct cn_notify_req {
77 __u32 first;
78 __u32 range;
79};
80
81/*
82 * Main notification control message
83 * *_notify_num - number of appropriate cn_notify_req structures after
84 * this struct.
85 * group - notification receiver's idx.
86 * len - total length of the attached data.
87 */
88struct cn_ctl_msg {
89 __u32 idx_notify_num;
90 __u32 val_notify_num;
91 __u32 group;
92 __u32 len;
93 __u8 data[0];
94};
95
96#ifdef __KERNEL__
97
98#include <asm/atomic.h>
99
100#include <linux/list.h>
101#include <linux/workqueue.h>
102
103#include <net/sock.h>
104
105#define CN_CBQ_NAMELEN 32
106
107struct cn_queue_dev {
108 atomic_t refcnt;
109 unsigned char name[CN_CBQ_NAMELEN];
110
111 struct workqueue_struct *cn_queue;
112
113 struct list_head queue_list;
114 spinlock_t queue_lock;
115
Evgeniy Polyakov7672d0b2005-09-11 19:15:07 -0700116 struct sock *nls;
117};
118
Evgeniy Polyakovacd042b2005-09-26 15:06:50 -0700119struct cn_callback_id {
Evgeniy Polyakov7672d0b2005-09-11 19:15:07 -0700120 unsigned char name[CN_CBQ_NAMELEN];
Evgeniy Polyakov7672d0b2005-09-11 19:15:07 -0700121 struct cb_id id;
Evgeniy Polyakovacd042b2005-09-26 15:06:50 -0700122};
123
124struct cn_callback_data {
125 void (*destruct_data) (void *);
126 void *ddata;
127
128 void *callback_priv;
Evgeniy Polyakov7672d0b2005-09-11 19:15:07 -0700129 void (*callback) (void *);
Evgeniy Polyakovacd042b2005-09-26 15:06:50 -0700130
131 void *free;
Evgeniy Polyakov7672d0b2005-09-11 19:15:07 -0700132};
133
134struct cn_callback_entry {
135 struct list_head callback_entry;
Evgeniy Polyakova240d9f2006-12-18 01:53:58 -0800136 struct work_struct work;
Evgeniy Polyakov7672d0b2005-09-11 19:15:07 -0700137 struct cn_queue_dev *pdev;
138
Evgeniy Polyakovacd042b2005-09-26 15:06:50 -0700139 struct cn_callback_id id;
140 struct cn_callback_data data;
Evgeniy Polyakov7672d0b2005-09-11 19:15:07 -0700141
Li Zefan6e328142008-01-04 01:59:42 -0800142 u32 seq, group;
Evgeniy Polyakov7672d0b2005-09-11 19:15:07 -0700143};
144
145struct cn_ctl_entry {
146 struct list_head notify_entry;
147 struct cn_ctl_msg *msg;
148};
149
150struct cn_dev {
151 struct cb_id id;
152
153 u32 seq, groups;
154 struct sock *nls;
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -0700155 void (*input) (struct sk_buff *skb);
Evgeniy Polyakov7672d0b2005-09-11 19:15:07 -0700156
157 struct cn_queue_dev *cbdev;
158};
159
160int cn_add_callback(struct cb_id *, char *, void (*callback) (void *));
161void cn_del_callback(struct cb_id *);
Al Virodd0fc662005-10-07 07:46:04 +0100162int cn_netlink_send(struct cn_msg *, u32, gfp_t);
Evgeniy Polyakov7672d0b2005-09-11 19:15:07 -0700163
Evgeniy Polyakovacd042b2005-09-26 15:06:50 -0700164int cn_queue_add_callback(struct cn_queue_dev *dev, char *name, struct cb_id *id, void (*callback)(void *));
Evgeniy Polyakov7672d0b2005-09-11 19:15:07 -0700165void cn_queue_del_callback(struct cn_queue_dev *dev, struct cb_id *id);
166
167struct cn_queue_dev *cn_queue_alloc_dev(char *name, struct sock *);
168void cn_queue_free_dev(struct cn_queue_dev *dev);
169
170int cn_cb_equal(struct cb_id *, struct cb_id *);
171
David Howellsc4028952006-11-22 14:57:56 +0000172void cn_queue_wrapper(struct work_struct *work);
Evgeniy Polyakovacd042b2005-09-26 15:06:50 -0700173
Evgeniy Polyakov7672d0b2005-09-11 19:15:07 -0700174#endif /* __KERNEL__ */
175#endif /* __CONNECTOR_H */