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Mark Fashehccd979b2005-12-15 14:31:24 -08001/* -*- 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
Mark Fashehd680efe2006-09-08 14:14:34 -070038#define OCFS2_DENTRY_LOCK_INO_START 18
39
Mark Fashehccd979b2005-12-15 14:31:24 -080040enum 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,
Mark Fashehd680efe2006-09-08 14:14:34 -070046 OCFS2_LOCK_TYPE_DENTRY,
Mark Fashehccd979b2005-12-15 14:31:24 -080047 OCFS2_NUM_LOCK_TYPES
48};
49
50static inline char ocfs2_lock_type_char(enum ocfs2_lock_type type)
51{
52 char c;
53 switch (type) {
54 case OCFS2_LOCK_TYPE_META:
55 c = 'M';
56 break;
57 case OCFS2_LOCK_TYPE_DATA:
58 c = 'D';
59 break;
60 case OCFS2_LOCK_TYPE_SUPER:
61 c = 'S';
62 break;
63 case OCFS2_LOCK_TYPE_RENAME:
64 c = 'R';
65 break;
66 case OCFS2_LOCK_TYPE_RW:
67 c = 'W';
68 break;
Mark Fashehd680efe2006-09-08 14:14:34 -070069 case OCFS2_LOCK_TYPE_DENTRY:
70 c = 'N';
71 break;
Mark Fashehccd979b2005-12-15 14:31:24 -080072 default:
73 c = '\0';
74 }
75
76 return c;
77}
78
Mark Fashehd680efe2006-09-08 14:14:34 -070079static char *ocfs2_lock_type_strings[] = {
80 [OCFS2_LOCK_TYPE_META] = "Meta",
81 [OCFS2_LOCK_TYPE_DATA] = "Data",
82 [OCFS2_LOCK_TYPE_SUPER] = "Super",
83 [OCFS2_LOCK_TYPE_RENAME] = "Rename",
84 /* Need to differntiate from [R]ename.. serializing writes is the
85 * important job it does, anyway. */
86 [OCFS2_LOCK_TYPE_RW] = "Write/Read",
87 [OCFS2_LOCK_TYPE_DENTRY] = "Dentry",
88};
89
90static inline const char *ocfs2_lock_type_string(enum ocfs2_lock_type type)
91{
92#ifdef __KERNEL__
93 mlog_bug_on_msg(type >= OCFS2_NUM_LOCK_TYPES, "%d\n", type);
94#endif
95 return ocfs2_lock_type_strings[type];
96}
97
Mark Fashehccd979b2005-12-15 14:31:24 -080098#endif /* OCFS2_LOCKID_H */