Linux kernel mirror (for testing)
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1/******************************************************************************
2*******************************************************************************
3**
4** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
5** Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
6**
7** This copyrighted material is made available to anyone wishing to use,
8** modify, copy, or redistribute it subject to the terms and conditions
9** of the GNU General Public License v.2.
10**
11*******************************************************************************
12******************************************************************************/
13
14/* This is the device interface for dlm, most users will use a library
15 * interface.
16 */
17
18#define DLM_USER_LVB_LEN 32
19
20/* Version of the device interface */
21#define DLM_DEVICE_VERSION_MAJOR 5
22#define DLM_DEVICE_VERSION_MINOR 0
23#define DLM_DEVICE_VERSION_PATCH 0
24
25/* struct passed to the lock write */
26struct dlm_lock_params {
27 __u8 mode;
28 __u8 namelen;
29 __u16 flags;
30 __u32 lkid;
31 __u32 parent;
32 void __user *castparam;
33 void __user *castaddr;
34 void __user *bastparam;
35 void __user *bastaddr;
36 struct dlm_lksb __user *lksb;
37 char lvb[DLM_USER_LVB_LEN];
38 char name[0];
39};
40
41struct dlm_lspace_params {
42 __u32 flags;
43 __u32 minor;
44 char name[0];
45};
46
47struct dlm_write_request {
48 __u32 version[3];
49 __u8 cmd;
50 __u8 is64bit;
51 __u8 unused[2];
52
53 union {
54 struct dlm_lock_params lock;
55 struct dlm_lspace_params lspace;
56 } i;
57};
58
59/* struct read from the "device" fd,
60 consists mainly of userspace pointers for the library to use */
61struct dlm_lock_result {
62 __u32 length;
63 void __user * user_astaddr;
64 void __user * user_astparam;
65 struct dlm_lksb __user * user_lksb;
66 struct dlm_lksb lksb;
67 __u8 bast_mode;
68 __u8 unused[3];
69 /* Offsets may be zero if no data is present */
70 __u32 lvb_offset;
71};
72
73/* Commands passed to the device */
74#define DLM_USER_LOCK 1
75#define DLM_USER_UNLOCK 2
76#define DLM_USER_QUERY 3
77#define DLM_USER_CREATE_LOCKSPACE 4
78#define DLM_USER_REMOVE_LOCKSPACE 5
79
80/* Arbitrary length restriction */
81#define MAX_LS_NAME_LEN 64
82
83/* Lockspace flags */
84#define DLM_USER_LSFLG_AUTOFREE 1
85#define DLM_USER_LSFLG_FORCEFREE 2
86