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1 | /* -*- mode: c; c-basic-offset: 8; -*- |
2 | * vim: noexpandtab sw=8 ts=8 sts=0: |
3 | * |
4 | * ocfs2_lockid.h |
5 | * |
6 | * Defines OCFS2 lockid bits. |
7 | * |
8 | * Copyright (C) 2002, 2005 Oracle. All rights reserved. |
9 | * |
10 | * This program is free software; you can redistribute it and/or |
11 | * modify it under the terms of the GNU General Public |
12 | * License as published by the Free Software Foundation; either |
13 | * version 2 of the License, or (at your option) any later version. |
14 | * |
15 | * This program is distributed in the hope that it will be useful, |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
18 | * General Public License for more details. |
19 | * |
20 | * You should have received a copy of the GNU General Public |
21 | * License along with this program; if not, write to the |
22 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
23 | * Boston, MA 021110-1307, USA. |
24 | */ |
25 | |
26 | #ifndef OCFS2_LOCKID_H |
27 | #define OCFS2_LOCKID_H |
28 | |
29 | /* lock ids are made up in the following manner: |
30 | * name[0] --> type |
31 | * name[1-6] --> 6 pad characters, reserved for now |
32 | * name[7-22] --> block number, expressed in hex as 16 chars |
33 | * name[23-30] --> i_generation, expressed in hex 8 chars |
34 | * name[31] --> '\0' */ |
35 | #define OCFS2_LOCK_ID_MAX_LEN 32 |
36 | #define OCFS2_LOCK_ID_PAD "000000" |
37 | |
38 | #define OCFS2_DENTRY_LOCK_INO_START 18 |
39 | |
40 | enum ocfs2_lock_type { |
41 | OCFS2_LOCK_TYPE_META = 0, |
42 | OCFS2_LOCK_TYPE_DATA, |
43 | OCFS2_LOCK_TYPE_SUPER, |
44 | OCFS2_LOCK_TYPE_RENAME, |
45 | OCFS2_LOCK_TYPE_RW, |
46 | OCFS2_LOCK_TYPE_DENTRY, |
47 | OCFS2_LOCK_TYPE_OPEN, |
48 | OCFS2_LOCK_TYPE_FLOCK, |
49 | OCFS2_LOCK_TYPE_QINFO, |
50 | OCFS2_LOCK_TYPE_NFS_SYNC, |
51 | OCFS2_LOCK_TYPE_ORPHAN_SCAN, |
52 | OCFS2_LOCK_TYPE_REFCOUNT, |
53 | OCFS2_NUM_LOCK_TYPES |
54 | }; |
55 | |
56 | static inline char ocfs2_lock_type_char(enum ocfs2_lock_type type) |
57 | { |
58 | char c; |
59 | switch (type) { |
60 | case OCFS2_LOCK_TYPE_META: |
61 | c = 'M'; |
62 | break; |
63 | case OCFS2_LOCK_TYPE_DATA: |
64 | c = 'D'; |
65 | break; |
66 | case OCFS2_LOCK_TYPE_SUPER: |
67 | c = 'S'; |
68 | break; |
69 | case OCFS2_LOCK_TYPE_RENAME: |
70 | c = 'R'; |
71 | break; |
72 | case OCFS2_LOCK_TYPE_RW: |
73 | c = 'W'; |
74 | break; |
75 | case OCFS2_LOCK_TYPE_DENTRY: |
76 | c = 'N'; |
77 | break; |
78 | case OCFS2_LOCK_TYPE_OPEN: |
79 | c = 'O'; |
80 | break; |
81 | case OCFS2_LOCK_TYPE_FLOCK: |
82 | c = 'F'; |
83 | break; |
84 | case OCFS2_LOCK_TYPE_QINFO: |
85 | c = 'Q'; |
86 | break; |
87 | case OCFS2_LOCK_TYPE_NFS_SYNC: |
88 | c = 'Y'; |
89 | break; |
90 | case OCFS2_LOCK_TYPE_ORPHAN_SCAN: |
91 | c = 'P'; |
92 | break; |
93 | case OCFS2_LOCK_TYPE_REFCOUNT: |
94 | c = 'T'; |
95 | break; |
96 | default: |
97 | c = '\0'; |
98 | } |
99 | |
100 | return c; |
101 | } |
102 | |
103 | static char *ocfs2_lock_type_strings[] = { |
104 | [OCFS2_LOCK_TYPE_META] = "Meta", |
105 | [OCFS2_LOCK_TYPE_DATA] = "Data", |
106 | [OCFS2_LOCK_TYPE_SUPER] = "Super", |
107 | [OCFS2_LOCK_TYPE_RENAME] = "Rename", |
108 | /* Need to differntiate from [R]ename.. serializing writes is the |
109 | * important job it does, anyway. */ |
110 | [OCFS2_LOCK_TYPE_RW] = "Write/Read", |
111 | [OCFS2_LOCK_TYPE_DENTRY] = "Dentry", |
112 | [OCFS2_LOCK_TYPE_OPEN] = "Open", |
113 | [OCFS2_LOCK_TYPE_FLOCK] = "Flock", |
114 | [OCFS2_LOCK_TYPE_QINFO] = "Quota", |
115 | [OCFS2_LOCK_TYPE_NFS_SYNC] = "NFSSync", |
116 | [OCFS2_LOCK_TYPE_ORPHAN_SCAN] = "OrphanScan", |
117 | [OCFS2_LOCK_TYPE_REFCOUNT] = "Refcount", |
118 | }; |
119 | |
120 | static inline const char *ocfs2_lock_type_string(enum ocfs2_lock_type type) |
121 | { |
122 | #ifdef __KERNEL__ |
123 | BUG_ON(type >= OCFS2_NUM_LOCK_TYPES); |
124 | #endif |
125 | return ocfs2_lock_type_strings[type]; |
126 | } |
127 | |
128 | #endif /* OCFS2_LOCKID_H */ |
129 |
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