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7672d0b5 EP |
1 | /* |
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 | ||
9f46080c MH |
30 | /* |
31 | * Process Events connector unique ids -- used for message routing | |
32 | */ | |
33 | #define CN_IDX_PROC 0x1 | |
34 | #define CN_VAL_PROC 0x1 | |
a2653eba SF |
35 | #define CN_IDX_CIFS 0x2 |
36 | #define CN_VAL_CIFS 0x1 | |
9f46080c | 37 | |
7672d0b5 EP |
38 | #define CN_NETLINK_USERS 1 |
39 | ||
40 | /* | |
41 | * Maximum connector's message size. | |
42 | */ | |
43 | #define CONNECTOR_MAX_MSG_SIZE 1024 | |
44 | ||
45 | /* | |
46 | * idx and val are unique identifiers which | |
47 | * are used for message routing and | |
48 | * must be registered in connector.h for in-kernel usage. | |
49 | */ | |
50 | ||
51 | struct cb_id { | |
52 | __u32 idx; | |
53 | __u32 val; | |
54 | }; | |
55 | ||
56 | struct cn_msg { | |
57 | struct cb_id id; | |
58 | ||
59 | __u32 seq; | |
60 | __u32 ack; | |
61 | ||
62 | __u16 len; /* Length of the following data */ | |
63 | __u16 flags; | |
64 | __u8 data[0]; | |
65 | }; | |
66 | ||
67 | /* | |
68 | * Notify structure - requests notification about | |
69 | * registering/unregistering idx/val in range [first, first+range]. | |
70 | */ | |
71 | struct cn_notify_req { | |
72 | __u32 first; | |
73 | __u32 range; | |
74 | }; | |
75 | ||
76 | /* | |
77 | * Main notification control message | |
78 | * *_notify_num - number of appropriate cn_notify_req structures after | |
79 | * this struct. | |
80 | * group - notification receiver's idx. | |
81 | * len - total length of the attached data. | |
82 | */ | |
83 | struct cn_ctl_msg { | |
84 | __u32 idx_notify_num; | |
85 | __u32 val_notify_num; | |
86 | __u32 group; | |
87 | __u32 len; | |
88 | __u8 data[0]; | |
89 | }; | |
90 | ||
91 | #ifdef __KERNEL__ | |
92 | ||
93 | #include <asm/atomic.h> | |
94 | ||
95 | #include <linux/list.h> | |
96 | #include <linux/workqueue.h> | |
97 | ||
98 | #include <net/sock.h> | |
99 | ||
100 | #define CN_CBQ_NAMELEN 32 | |
101 | ||
102 | struct cn_queue_dev { | |
103 | atomic_t refcnt; | |
104 | unsigned char name[CN_CBQ_NAMELEN]; | |
105 | ||
106 | struct workqueue_struct *cn_queue; | |
107 | ||
108 | struct list_head queue_list; | |
109 | spinlock_t queue_lock; | |
110 | ||
111 | int netlink_groups; | |
112 | struct sock *nls; | |
113 | }; | |
114 | ||
acd042bb | 115 | struct cn_callback_id { |
7672d0b5 | 116 | unsigned char name[CN_CBQ_NAMELEN]; |
7672d0b5 | 117 | struct cb_id id; |
acd042bb EP |
118 | }; |
119 | ||
120 | struct cn_callback_data { | |
121 | void (*destruct_data) (void *); | |
122 | void *ddata; | |
123 | ||
124 | void *callback_priv; | |
7672d0b5 | 125 | void (*callback) (void *); |
acd042bb EP |
126 | |
127 | void *free; | |
7672d0b5 EP |
128 | }; |
129 | ||
130 | struct cn_callback_entry { | |
131 | struct list_head callback_entry; | |
132 | struct cn_callback *cb; | |
133 | struct work_struct work; | |
134 | struct cn_queue_dev *pdev; | |
135 | ||
acd042bb EP |
136 | struct cn_callback_id id; |
137 | struct cn_callback_data data; | |
7672d0b5 EP |
138 | |
139 | int seq, group; | |
140 | struct sock *nls; | |
141 | }; | |
142 | ||
143 | struct cn_ctl_entry { | |
144 | struct list_head notify_entry; | |
145 | struct cn_ctl_msg *msg; | |
146 | }; | |
147 | ||
148 | struct cn_dev { | |
149 | struct cb_id id; | |
150 | ||
151 | u32 seq, groups; | |
152 | struct sock *nls; | |
153 | void (*input) (struct sock * sk, int len); | |
154 | ||
155 | struct cn_queue_dev *cbdev; | |
156 | }; | |
157 | ||
158 | int cn_add_callback(struct cb_id *, char *, void (*callback) (void *)); | |
159 | void cn_del_callback(struct cb_id *); | |
dd0fc66f | 160 | int cn_netlink_send(struct cn_msg *, u32, gfp_t); |
7672d0b5 | 161 | |
acd042bb | 162 | int cn_queue_add_callback(struct cn_queue_dev *dev, char *name, struct cb_id *id, void (*callback)(void *)); |
7672d0b5 EP |
163 | void cn_queue_del_callback(struct cn_queue_dev *dev, struct cb_id *id); |
164 | ||
165 | struct cn_queue_dev *cn_queue_alloc_dev(char *name, struct sock *); | |
166 | void cn_queue_free_dev(struct cn_queue_dev *dev); | |
167 | ||
168 | int cn_cb_equal(struct cb_id *, struct cb_id *); | |
169 | ||
acd042bb EP |
170 | void cn_queue_wrapper(void *data); |
171 | ||
7672d0b5 EP |
172 | extern int cn_already_initialized; |
173 | ||
174 | #endif /* __KERNEL__ */ | |
175 | #endif /* __CONNECTOR_H */ |