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

source code of linux/include/uapi/linux/dlm_device.h