1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2/******************************************************************************
3*******************************************************************************
4**
5**  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
6**  Copyright (C) 2004-2007 Red Hat, Inc.  All rights reserved.
7**
8**  This copyrighted material is made available to anyone wishing to use,
9**  modify, copy, or redistribute it subject to the terms and conditions
10**  of the GNU General Public License v.2.
11**
12*******************************************************************************
13******************************************************************************/
14
15#ifndef _LINUX_DLM_DEVICE_H
16#define _LINUX_DLM_DEVICE_H
17
18/* This is the device interface for dlm, most users will use a library
19 * interface.
20 */
21
22#include <linux/dlm.h>
23#include <linux/types.h>
24
25#define DLM_USER_LVB_LEN	32
26
27/* Version of the device interface */
28#define DLM_DEVICE_VERSION_MAJOR 6
29#define DLM_DEVICE_VERSION_MINOR 0
30#define DLM_DEVICE_VERSION_PATCH 2
31
32/* struct passed to the lock write */
33struct dlm_lock_params {
34	__u8 mode;
35	__u8 namelen;
36	__u16 unused;
37	__u32 flags;
38	__u32 lkid;
39	__u32 parent;
40	__u64 xid;
41	__u64 timeout;
42	void __user *castparam;
43	void __user *castaddr;
44	void __user *bastparam;
45	void __user *bastaddr;
46	struct dlm_lksb __user *lksb;
47	char lvb[DLM_USER_LVB_LEN];
48	char name[];
49};
50
51struct dlm_lspace_params {
52	__u32 flags;
53	__u32 minor;
54	char name[];
55};
56
57struct dlm_purge_params {
58	__u32 nodeid;
59	__u32 pid;
60};
61
62struct dlm_write_request {
63	__u32 version[3];
64	__u8 cmd;
65	__u8 is64bit;
66	__u8 unused[2];
67
68	union  {
69		struct dlm_lock_params   lock;
70		struct dlm_lspace_params lspace;
71		struct dlm_purge_params  purge;
72	} i;
73};
74
75struct dlm_device_version {
76	__u32 version[3];
77};
78
79/* struct read from the "device" fd,
80   consists mainly of userspace pointers for the library to use */
81
82struct dlm_lock_result {
83	__u32 version[3];
84	__u32 length;
85	void __user * user_astaddr;
86	void __user * user_astparam;
87	struct dlm_lksb __user * user_lksb;
88	struct dlm_lksb lksb;
89	__u8 bast_mode;
90	__u8 unused[3];
91	/* Offsets may be zero if no data is present */
92	__u32 lvb_offset;
93};
94
95/* Commands passed to the device */
96#define DLM_USER_LOCK         1
97#define DLM_USER_UNLOCK       2
98#define DLM_USER_QUERY        3
99#define DLM_USER_CREATE_LOCKSPACE  4
100#define DLM_USER_REMOVE_LOCKSPACE  5
101#define DLM_USER_PURGE        6
102#define DLM_USER_DEADLOCK     7
103
104/* Lockspace flags */
105#define DLM_USER_LSFLG_AUTOFREE   1
106#define DLM_USER_LSFLG_FORCEFREE  2
107
108#endif
109
110