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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 */ |
4f03a2c9 | 46 | #define CN_KVP_VAL 0x1 /* queries from the kernel */ |
9f46080c | 47 | |
ea2c0009 | 48 | #define CN_NETLINK_USERS 10 /* Highest index + 1 */ |
7672d0b5 EP |
49 | |
50 | /* | |
51 | * Maximum connector's message size. | |
52 | */ | |
3d62a44f | 53 | #define CONNECTOR_MAX_MSG_SIZE 16384 |
7672d0b5 EP |
54 | |
55 | /* | |
56 | * idx and val are unique identifiers which | |
57 | * are used for message routing and | |
58 | * must be registered in connector.h for in-kernel usage. | |
59 | */ | |
60 | ||
61 | struct cb_id { | |
62 | __u32 idx; | |
63 | __u32 val; | |
64 | }; | |
65 | ||
66 | struct cn_msg { | |
67 | struct cb_id id; | |
68 | ||
69 | __u32 seq; | |
70 | __u32 ack; | |
71 | ||
72 | __u16 len; /* Length of the following data */ | |
73 | __u16 flags; | |
74 | __u8 data[0]; | |
75 | }; | |
76 | ||
7672d0b5 EP |
77 | #ifdef __KERNEL__ |
78 | ||
60063497 | 79 | #include <linux/atomic.h> |
7672d0b5 EP |
80 | |
81 | #include <linux/list.h> | |
82 | #include <linux/workqueue.h> | |
83 | ||
84 | #include <net/sock.h> | |
85 | ||
86 | #define CN_CBQ_NAMELEN 32 | |
87 | ||
88 | struct cn_queue_dev { | |
89 | atomic_t refcnt; | |
90 | unsigned char name[CN_CBQ_NAMELEN]; | |
91 | ||
7672d0b5 EP |
92 | struct list_head queue_list; |
93 | spinlock_t queue_lock; | |
94 | ||
7672d0b5 EP |
95 | struct sock *nls; |
96 | }; | |
97 | ||
acd042bb | 98 | struct cn_callback_id { |
7672d0b5 | 99 | unsigned char name[CN_CBQ_NAMELEN]; |
7672d0b5 | 100 | struct cb_id id; |
acd042bb EP |
101 | }; |
102 | ||
7672d0b5 EP |
103 | struct cn_callback_entry { |
104 | struct list_head callback_entry; | |
04f482fa | 105 | atomic_t refcnt; |
7672d0b5 EP |
106 | struct cn_queue_dev *pdev; |
107 | ||
acd042bb | 108 | struct cn_callback_id id; |
04f482fa | 109 | void (*callback) (struct cn_msg *, struct netlink_skb_parms *); |
7672d0b5 | 110 | |
6e32814b | 111 | u32 seq, group; |
7672d0b5 EP |
112 | }; |
113 | ||
7672d0b5 EP |
114 | struct cn_dev { |
115 | struct cb_id id; | |
116 | ||
117 | u32 seq, groups; | |
118 | struct sock *nls; | |
cd40b7d3 | 119 | void (*input) (struct sk_buff *skb); |
7672d0b5 EP |
120 | |
121 | struct cn_queue_dev *cbdev; | |
122 | }; | |
123 | ||
008536e8 JP |
124 | int cn_add_callback(struct cb_id *id, const char *name, |
125 | void (*callback)(struct cn_msg *, struct netlink_skb_parms *)); | |
7672d0b5 | 126 | void cn_del_callback(struct cb_id *); |
dd0fc66f | 127 | int cn_netlink_send(struct cn_msg *, u32, gfp_t); |
7672d0b5 | 128 | |
008536e8 JP |
129 | int cn_queue_add_callback(struct cn_queue_dev *dev, const char *name, |
130 | struct cb_id *id, | |
131 | void (*callback)(struct cn_msg *, struct netlink_skb_parms *)); | |
7672d0b5 | 132 | void cn_queue_del_callback(struct cn_queue_dev *dev, struct cb_id *id); |
04f482fa | 133 | void cn_queue_release_callback(struct cn_callback_entry *); |
7672d0b5 | 134 | |
008536e8 | 135 | struct cn_queue_dev *cn_queue_alloc_dev(const char *name, struct sock *); |
7672d0b5 EP |
136 | void cn_queue_free_dev(struct cn_queue_dev *dev); |
137 | ||
138 | int cn_cb_equal(struct cb_id *, struct cb_id *); | |
139 | ||
7672d0b5 EP |
140 | #endif /* __KERNEL__ */ |
141 | #endif /* __CONNECTOR_H */ |