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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 <linux/types.h> |
26 | |
27 | /* |
28 | * Process Events connector unique ids -- used for message routing |
29 | */ |
30 | #define CN_IDX_PROC 0x1 |
31 | #define CN_VAL_PROC 0x1 |
32 | #define CN_IDX_CIFS 0x2 |
33 | #define CN_VAL_CIFS 0x1 |
34 | #define CN_W1_IDX 0x3 /* w1 communication */ |
35 | #define CN_W1_VAL 0x1 |
36 | #define CN_IDX_V86D 0x4 |
37 | #define CN_VAL_V86D_UVESAFB 0x1 |
38 | #define CN_IDX_BB 0x5 /* BlackBoard, from the TSP GPL sampling framework */ |
39 | #define CN_DST_IDX 0x6 |
40 | #define CN_DST_VAL 0x1 |
41 | #define CN_IDX_DM 0x7 /* Device Mapper */ |
42 | #define CN_VAL_DM_USERSPACE_LOG 0x1 |
43 | #define CN_IDX_DRBD 0x8 |
44 | #define CN_VAL_DRBD 0x1 |
45 | |
46 | #define CN_NETLINK_USERS 8 |
47 | |
48 | /* |
49 | * Maximum connector's message size. |
50 | */ |
51 | #define CONNECTOR_MAX_MSG_SIZE 16384 |
52 | |
53 | /* |
54 | * idx and val are unique identifiers which |
55 | * are used for message routing and |
56 | * must be registered in connector.h for in-kernel usage. |
57 | */ |
58 | |
59 | struct cb_id { |
60 | __u32 idx; |
61 | __u32 val; |
62 | }; |
63 | |
64 | struct cn_msg { |
65 | struct cb_id id; |
66 | |
67 | __u32 seq; |
68 | __u32 ack; |
69 | |
70 | __u16 len; /* Length of the following data */ |
71 | __u16 flags; |
72 | __u8 data[0]; |
73 | }; |
74 | |
75 | #ifdef __KERNEL__ |
76 | |
77 | #include <asm/atomic.h> |
78 | |
79 | #include <linux/list.h> |
80 | #include <linux/workqueue.h> |
81 | |
82 | #include <net/sock.h> |
83 | |
84 | #define CN_CBQ_NAMELEN 32 |
85 | |
86 | struct cn_queue_dev { |
87 | atomic_t refcnt; |
88 | unsigned char name[CN_CBQ_NAMELEN]; |
89 | |
90 | struct workqueue_struct *cn_queue; |
91 | |
92 | struct list_head queue_list; |
93 | spinlock_t queue_lock; |
94 | |
95 | struct sock *nls; |
96 | }; |
97 | |
98 | struct cn_callback_id { |
99 | unsigned char name[CN_CBQ_NAMELEN]; |
100 | struct cb_id id; |
101 | }; |
102 | |
103 | struct cn_callback_data { |
104 | struct sk_buff *skb; |
105 | void (*callback) (struct cn_msg *, struct netlink_skb_parms *); |
106 | |
107 | void *free; |
108 | }; |
109 | |
110 | struct cn_callback_entry { |
111 | struct list_head callback_entry; |
112 | struct work_struct work; |
113 | struct cn_queue_dev *pdev; |
114 | |
115 | struct cn_callback_id id; |
116 | struct cn_callback_data data; |
117 | |
118 | u32 seq, group; |
119 | }; |
120 | |
121 | struct cn_dev { |
122 | struct cb_id id; |
123 | |
124 | u32 seq, groups; |
125 | struct sock *nls; |
126 | void (*input) (struct sk_buff *skb); |
127 | |
128 | struct cn_queue_dev *cbdev; |
129 | }; |
130 | |
131 | int cn_add_callback(struct cb_id *, char *, void (*callback) (struct cn_msg *, struct netlink_skb_parms *)); |
132 | void cn_del_callback(struct cb_id *); |
133 | int cn_netlink_send(struct cn_msg *, u32, gfp_t); |
134 | |
135 | int cn_queue_add_callback(struct cn_queue_dev *dev, char *name, struct cb_id *id, void (*callback)(struct cn_msg *, struct netlink_skb_parms *)); |
136 | void cn_queue_del_callback(struct cn_queue_dev *dev, struct cb_id *id); |
137 | |
138 | struct cn_queue_dev *cn_queue_alloc_dev(char *name, struct sock *); |
139 | void cn_queue_free_dev(struct cn_queue_dev *dev); |
140 | |
141 | int cn_cb_equal(struct cb_id *, struct cb_id *); |
142 | |
143 | void cn_queue_wrapper(struct work_struct *work); |
144 | |
145 | #endif /* __KERNEL__ */ |
146 | #endif /* __CONNECTOR_H */ |
147 |
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