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 */