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