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1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
2 /*
3  * 	connector.h
4  *
5  * 2004-2005 Copyright (c) Evgeniy Polyakov <zbr@ioremap.net>
6  * All rights reserved.
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
21  */
22 
23 #ifndef _UAPI__CONNECTOR_H
24 #define _UAPI__CONNECTOR_H
25 
26 #include <linux/types.h>
27 
28 /*
29  * Process Events connector unique ids -- used for message routing
30  */
31 #define CN_IDX_PROC			0x1
32 #define CN_VAL_PROC			0x1
33 #define CN_IDX_CIFS			0x2
34 #define CN_VAL_CIFS                     0x1
35 #define CN_W1_IDX			0x3	/* w1 communication */
36 #define CN_W1_VAL			0x1
37 #define CN_IDX_V86D			0x4
38 #define CN_VAL_V86D_UVESAFB		0x1
39 #define CN_IDX_BB			0x5	/* BlackBoard, from the TSP GPL sampling framework */
40 #define CN_DST_IDX			0x6
41 #define CN_DST_VAL			0x1
42 #define CN_IDX_DM			0x7	/* Device Mapper */
43 #define CN_VAL_DM_USERSPACE_LOG		0x1
44 #define CN_IDX_DRBD			0x8
45 #define CN_VAL_DRBD			0x1
46 #define CN_KVP_IDX			0x9	/* HyperV KVP */
47 #define CN_KVP_VAL			0x1	/* queries from the kernel */
48 #define CN_VSS_IDX			0xA     /* HyperV VSS */
49 #define CN_VSS_VAL			0x1     /* queries from the kernel */
50 
51 
52 #define CN_NETLINK_USERS		11	/* Highest index + 1 */
53 
54 /*
55  * Maximum connector's message size.
56  */
57 #define CONNECTOR_MAX_MSG_SIZE		16384
58 
59 /*
60  * idx and val are unique identifiers which
61  * are used for message routing and
62  * must be registered in connector.h for in-kernel usage.
63  */
64 
65 struct cb_id {
66 	__u32 idx;
67 	__u32 val;
68 };
69 
70 struct cn_msg {
71 	struct cb_id id;
72 
73 	__u32 seq;
74 	__u32 ack;
75 
76 	__u16 len;		/* Length of the following data */
77 	__u16 flags;
78 	__u8 data[0];
79 };
80 
81 #endif /* _UAPI__CONNECTOR_H */
82