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