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7672d0b5 EP |
1 | /* |
2 | * connector.h | |
3 | * | |
a8018766 | 4 | * 2004-2005 Copyright (c) Evgeniy Polyakov <zbr@ioremap.net> |
7672d0b5 EP |
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 | ||
00bfddaf | 25 | #include <linux/types.h> |
7672d0b5 | 26 | |
9f46080c MH |
27 | /* |
28 | * Process Events connector unique ids -- used for message routing | |
29 | */ | |
30 | #define CN_IDX_PROC 0x1 | |
31 | #define CN_VAL_PROC 0x1 | |
a2653eba SF |
32 | #define CN_IDX_CIFS 0x2 |
33 | #define CN_VAL_CIFS 0x1 | |
b6043fca EP |
34 | #define CN_W1_IDX 0x3 /* w1 communication */ |
35 | #define CN_W1_VAL 0x1 | |
cc54f46e MJ |
36 | #define CN_IDX_V86D 0x4 |
37 | #define CN_VAL_V86D_UVESAFB 0x1 | |
2c203003 | 38 | #define CN_IDX_BB 0x5 /* BlackBoard, from the TSP GPL sampling framework */ |
ce0d9d72 EP |
39 | #define CN_DST_IDX 0x6 |
40 | #define CN_DST_VAL 0x1 | |
f5db4af4 JB |
41 | #define CN_IDX_DM 0x7 /* Device Mapper */ |
42 | #define CN_VAL_DM_USERSPACE_LOG 0x1 | |
35a8a3fd PR |
43 | #define CN_IDX_DRBD 0x8 |
44 | #define CN_VAL_DRBD 0x1 | |
a0a5b676 | 45 | #define CN_KVP_IDX 0x9 /* HyperV KVP */ |
9f46080c | 46 | |
ea2c0009 | 47 | #define CN_NETLINK_USERS 10 /* Highest index + 1 */ |
7672d0b5 EP |
48 | |
49 | /* | |
50 | * Maximum connector's message size. | |
51 | */ | |
3d62a44f | 52 | #define CONNECTOR_MAX_MSG_SIZE 16384 |
7672d0b5 EP |
53 | |
54 | /* | |
55 | * idx and val are unique identifiers which | |
56 | * are used for message routing and | |
57 | * must be registered in connector.h for in-kernel usage. | |
58 | */ | |
59 | ||
60 | struct cb_id { | |
61 | __u32 idx; | |
62 | __u32 val; | |
63 | }; | |
64 | ||
65 | struct cn_msg { | |
66 | struct cb_id id; | |
67 | ||
68 | __u32 seq; | |
69 | __u32 ack; | |
70 | ||
71 | __u16 len; /* Length of the following data */ | |
72 | __u16 flags; | |
73 | __u8 data[0]; | |
74 | }; | |
75 | ||
7672d0b5 EP |
76 | #ifdef __KERNEL__ |
77 | ||
60063497 | 78 | #include <linux/atomic.h> |
7672d0b5 EP |
79 | |
80 | #include <linux/list.h> | |
81 | #include <linux/workqueue.h> | |
82 | ||
83 | #include <net/sock.h> | |
84 | ||
85 | #define CN_CBQ_NAMELEN 32 | |
86 | ||
87 | struct cn_queue_dev { | |
88 | atomic_t refcnt; | |
89 | unsigned char name[CN_CBQ_NAMELEN]; | |
90 | ||
7672d0b5 EP |
91 | struct list_head queue_list; |
92 | spinlock_t queue_lock; | |
93 | ||
7672d0b5 EP |
94 | struct sock *nls; |
95 | }; | |
96 | ||
acd042bb | 97 | struct cn_callback_id { |
7672d0b5 | 98 | unsigned char name[CN_CBQ_NAMELEN]; |
7672d0b5 | 99 | struct cb_id id; |
acd042bb EP |
100 | }; |
101 | ||
7672d0b5 EP |
102 | struct cn_callback_entry { |
103 | struct list_head callback_entry; | |
04f482fa | 104 | atomic_t refcnt; |
7672d0b5 EP |
105 | struct cn_queue_dev *pdev; |
106 | ||
acd042bb | 107 | struct cn_callback_id id; |
04f482fa | 108 | void (*callback) (struct cn_msg *, struct netlink_skb_parms *); |
7672d0b5 | 109 | |
6e32814b | 110 | u32 seq, group; |
7672d0b5 EP |
111 | }; |
112 | ||
7672d0b5 EP |
113 | struct cn_dev { |
114 | struct cb_id id; | |
115 | ||
116 | u32 seq, groups; | |
117 | struct sock *nls; | |
cd40b7d3 | 118 | void (*input) (struct sk_buff *skb); |
7672d0b5 EP |
119 | |
120 | struct cn_queue_dev *cbdev; | |
121 | }; | |
122 | ||
008536e8 JP |
123 | int cn_add_callback(struct cb_id *id, const char *name, |
124 | void (*callback)(struct cn_msg *, struct netlink_skb_parms *)); | |
7672d0b5 | 125 | void cn_del_callback(struct cb_id *); |
dd0fc66f | 126 | int cn_netlink_send(struct cn_msg *, u32, gfp_t); |
7672d0b5 | 127 | |
008536e8 JP |
128 | int cn_queue_add_callback(struct cn_queue_dev *dev, const char *name, |
129 | struct cb_id *id, | |
130 | void (*callback)(struct cn_msg *, struct netlink_skb_parms *)); | |
7672d0b5 | 131 | void cn_queue_del_callback(struct cn_queue_dev *dev, struct cb_id *id); |
04f482fa | 132 | void cn_queue_release_callback(struct cn_callback_entry *); |
7672d0b5 | 133 | |
008536e8 | 134 | struct cn_queue_dev *cn_queue_alloc_dev(const char *name, struct sock *); |
7672d0b5 EP |
135 | void cn_queue_free_dev(struct cn_queue_dev *dev); |
136 | ||
137 | int cn_cb_equal(struct cb_id *, struct cb_id *); | |
138 | ||
7672d0b5 EP |
139 | #endif /* __KERNEL__ */ |
140 | #endif /* __CONNECTOR_H */ |