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 | |