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 __CONNECTOR_H
24#define __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
65struct cb_id {
66 __u32 idx;
67 __u32 val;
68};
69
70struct 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 /* __CONNECTOR_H */
82