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
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[];
79};
80
81#endif /* _UAPI__CONNECTOR_H */
82