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 /* 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 6
22 #define DLM_DEVICE_VERSION_MINOR 0
23 #define DLM_DEVICE_VERSION_PATCH 0
24
25 /* struct passed to the lock write */
26 struct dlm_lock_params {
27 __u8 mode;
28 __u8 namelen;
29 __u16 unused;
30 __u32 flags;
31 __u32 lkid;
32 __u32 parent;
33 __u64 xid;
34 __u64 timeout;
35 void __user *castparam;
36 void __user *castaddr;
37 void __user *bastparam;
38 void __user *bastaddr;
39 struct dlm_lksb __user *lksb;
40 char lvb[DLM_USER_LVB_LEN];
41 char name[0];
42 };
43
44 struct dlm_lspace_params {
45 __u32 flags;
46 __u32 minor;
47 char name[0];
48 };
49
50 struct dlm_purge_params {
51 __u32 nodeid;
52 __u32 pid;
53 };
54
55 struct dlm_write_request {
56 __u32 version[3];
57 __u8 cmd;
58 __u8 is64bit;
59 __u8 unused[2];
60
61 union {
62 struct dlm_lock_params lock;
63 struct dlm_lspace_params lspace;
64 struct dlm_purge_params purge;
65 } i;
66 };
67
68 struct dlm_device_version {
69 __u32 version[3];
70 };
71
72 /* struct read from the "device" fd,
73 consists mainly of userspace pointers for the library to use */
74
75 struct dlm_lock_result {
76 __u32 version[3];
77 __u32 length;
78 void __user * user_astaddr;
79 void __user * user_astparam;
80 struct dlm_lksb __user * user_lksb;
81 struct dlm_lksb lksb;
82 __u8 bast_mode;
83 __u8 unused[3];
84 /* Offsets may be zero if no data is present */
85 __u32 lvb_offset;
86 };
87
88 /* Commands passed to the device */
89 #define DLM_USER_LOCK 1
90 #define DLM_USER_UNLOCK 2
91 #define DLM_USER_QUERY 3
92 #define DLM_USER_CREATE_LOCKSPACE 4
93 #define DLM_USER_REMOVE_LOCKSPACE 5
94 #define DLM_USER_PURGE 6
95 #define DLM_USER_DEADLOCK 7
96
97 /* Arbitrary length restriction */
98 #define MAX_LS_NAME_LEN 64
99
100 /* Lockspace flags */
101 #define DLM_USER_LSFLG_AUTOFREE 1
102 #define DLM_USER_LSFLG_FORCEFREE 2
103
104
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