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ocfs2: Add missing lock name
[~shefty/rdma-dev.git] / fs / ocfs2 / ocfs2_lockid.h
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_NUM_LOCK_TYPES
53 };
54
55 static inline char ocfs2_lock_type_char(enum ocfs2_lock_type type)
56 {
57         char c;
58         switch (type) {
59                 case OCFS2_LOCK_TYPE_META:
60                         c = 'M';
61                         break;
62                 case OCFS2_LOCK_TYPE_DATA:
63                         c = 'D';
64                         break;
65                 case OCFS2_LOCK_TYPE_SUPER:
66                         c = 'S';
67                         break;
68                 case OCFS2_LOCK_TYPE_RENAME:
69                         c = 'R';
70                         break;
71                 case OCFS2_LOCK_TYPE_RW:
72                         c = 'W';
73                         break;
74                 case OCFS2_LOCK_TYPE_DENTRY:
75                         c = 'N';
76                         break;
77                 case OCFS2_LOCK_TYPE_OPEN:
78                         c = 'O';
79                         break;
80                 case OCFS2_LOCK_TYPE_FLOCK:
81                         c = 'F';
82                         break;
83                 case OCFS2_LOCK_TYPE_QINFO:
84                         c = 'Q';
85                         break;
86                 case OCFS2_LOCK_TYPE_NFS_SYNC:
87                         c = 'Y';
88                         break;
89                 case OCFS2_LOCK_TYPE_ORPHAN_SCAN:
90                         c = 'P';
91                         break;
92                 default:
93                         c = '\0';
94         }
95
96         return c;
97 }
98
99 static char *ocfs2_lock_type_strings[] = {
100         [OCFS2_LOCK_TYPE_META] = "Meta",
101         [OCFS2_LOCK_TYPE_DATA] = "Data",
102         [OCFS2_LOCK_TYPE_SUPER] = "Super",
103         [OCFS2_LOCK_TYPE_RENAME] = "Rename",
104         /* Need to differntiate from [R]ename.. serializing writes is the
105          * important job it does, anyway. */
106         [OCFS2_LOCK_TYPE_RW] = "Write/Read",
107         [OCFS2_LOCK_TYPE_DENTRY] = "Dentry",
108         [OCFS2_LOCK_TYPE_OPEN] = "Open",
109         [OCFS2_LOCK_TYPE_FLOCK] = "Flock",
110         [OCFS2_LOCK_TYPE_QINFO] = "Quota",
111         [OCFS2_LOCK_TYPE_NFS_SYNC] = "NFSSync",
112         [OCFS2_LOCK_TYPE_ORPHAN_SCAN] = "OrphanScan",
113 };
114
115 static inline const char *ocfs2_lock_type_string(enum ocfs2_lock_type type)
116 {
117 #ifdef __KERNEL__
118         BUG_ON(type >= OCFS2_NUM_LOCK_TYPES);
119 #endif
120         return ocfs2_lock_type_strings[type];
121 }
122
123 #endif  /* OCFS2_LOCKID_H */