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ccd979bd MF |
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 | ||
d680efe9 MF |
38 | #define OCFS2_DENTRY_LOCK_INO_START 18 |
39 | ||
ccd979bd MF |
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, | |
d680efe9 | 46 | OCFS2_LOCK_TYPE_DENTRY, |
50008630 | 47 | OCFS2_LOCK_TYPE_OPEN, |
cf8e06f1 | 48 | OCFS2_LOCK_TYPE_FLOCK, |
9e33d69f | 49 | OCFS2_LOCK_TYPE_QINFO, |
6ca497a8 | 50 | OCFS2_LOCK_TYPE_NFS_SYNC, |
83273932 | 51 | OCFS2_LOCK_TYPE_ORPHAN_SCAN, |
8dec98ed | 52 | OCFS2_LOCK_TYPE_REFCOUNT, |
4882abeb | 53 | OCFS2_LOCK_TYPE_TRIM_FS, |
ccd979bd MF |
54 | OCFS2_NUM_LOCK_TYPES |
55 | }; | |
56 | ||
57 | static inline char ocfs2_lock_type_char(enum ocfs2_lock_type type) | |
58 | { | |
59 | char c; | |
60 | switch (type) { | |
61 | case OCFS2_LOCK_TYPE_META: | |
62 | c = 'M'; | |
63 | break; | |
64 | case OCFS2_LOCK_TYPE_DATA: | |
65 | c = 'D'; | |
66 | break; | |
67 | case OCFS2_LOCK_TYPE_SUPER: | |
68 | c = 'S'; | |
69 | break; | |
70 | case OCFS2_LOCK_TYPE_RENAME: | |
71 | c = 'R'; | |
72 | break; | |
73 | case OCFS2_LOCK_TYPE_RW: | |
74 | c = 'W'; | |
75 | break; | |
d680efe9 MF |
76 | case OCFS2_LOCK_TYPE_DENTRY: |
77 | c = 'N'; | |
78 | break; | |
50008630 TY |
79 | case OCFS2_LOCK_TYPE_OPEN: |
80 | c = 'O'; | |
81 | break; | |
cf8e06f1 MF |
82 | case OCFS2_LOCK_TYPE_FLOCK: |
83 | c = 'F'; | |
84 | break; | |
9e33d69f JK |
85 | case OCFS2_LOCK_TYPE_QINFO: |
86 | c = 'Q'; | |
87 | break; | |
6ca497a8 | 88 | case OCFS2_LOCK_TYPE_NFS_SYNC: |
89 | c = 'Y'; | |
90 | break; | |
83273932 SE |
91 | case OCFS2_LOCK_TYPE_ORPHAN_SCAN: |
92 | c = 'P'; | |
93 | break; | |
8dec98ed TM |
94 | case OCFS2_LOCK_TYPE_REFCOUNT: |
95 | c = 'T'; | |
96 | break; | |
4882abeb GH |
97 | case OCFS2_LOCK_TYPE_TRIM_FS: |
98 | c = 'I'; | |
99 | break; | |
ccd979bd MF |
100 | default: |
101 | c = '\0'; | |
102 | } | |
103 | ||
104 | return c; | |
105 | } | |
106 | ||
d680efe9 MF |
107 | static char *ocfs2_lock_type_strings[] = { |
108 | [OCFS2_LOCK_TYPE_META] = "Meta", | |
109 | [OCFS2_LOCK_TYPE_DATA] = "Data", | |
110 | [OCFS2_LOCK_TYPE_SUPER] = "Super", | |
111 | [OCFS2_LOCK_TYPE_RENAME] = "Rename", | |
112 | /* Need to differntiate from [R]ename.. serializing writes is the | |
113 | * important job it does, anyway. */ | |
114 | [OCFS2_LOCK_TYPE_RW] = "Write/Read", | |
115 | [OCFS2_LOCK_TYPE_DENTRY] = "Dentry", | |
50008630 | 116 | [OCFS2_LOCK_TYPE_OPEN] = "Open", |
cf8e06f1 | 117 | [OCFS2_LOCK_TYPE_FLOCK] = "Flock", |
9e33d69f | 118 | [OCFS2_LOCK_TYPE_QINFO] = "Quota", |
a8b88d3d | 119 | [OCFS2_LOCK_TYPE_NFS_SYNC] = "NFSSync", |
83273932 | 120 | [OCFS2_LOCK_TYPE_ORPHAN_SCAN] = "OrphanScan", |
8dec98ed | 121 | [OCFS2_LOCK_TYPE_REFCOUNT] = "Refcount", |
4882abeb | 122 | [OCFS2_LOCK_TYPE_TRIM_FS] = "TrimFs", |
d680efe9 MF |
123 | }; |
124 | ||
125 | static inline const char *ocfs2_lock_type_string(enum ocfs2_lock_type type) | |
126 | { | |
127 | #ifdef __KERNEL__ | |
8f318311 | 128 | BUG_ON(type >= OCFS2_NUM_LOCK_TYPES); |
d680efe9 MF |
129 | #endif |
130 | return ocfs2_lock_type_strings[type]; | |
131 | } | |
132 | ||
ccd979bd | 133 | #endif /* OCFS2_LOCKID_H */ |