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 */
33 struct 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
51 struct dlm_lspace_params {
52 __u32 flags;
53 __u32 minor;
54 char name[];
55 };
56
57 struct dlm_purge_params {
58 __u32 nodeid;
59 __u32 pid;
60 };
61
62 struct 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
75 struct 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
82 struct 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
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