OpenCores
URL https://opencores.org/ocsvn/test_project/test_project/trunk

Subversion Repositories test_project

[/] [test_project/] [trunk/] [linux_sd_driver/] [fs/] [ocfs2/] [ocfs2_lockid.h] - Blame information for rev 62

Details | Compare with Previous | View Log

Line No. Rev Author Line
1 62 marcus.erl
/* -*- 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_NUM_LOCK_TYPES
49
};
50
 
51
static inline char ocfs2_lock_type_char(enum ocfs2_lock_type type)
52
{
53
        char c;
54
        switch (type) {
55
                case OCFS2_LOCK_TYPE_META:
56
                        c = 'M';
57
                        break;
58
                case OCFS2_LOCK_TYPE_DATA:
59
                        c = 'D';
60
                        break;
61
                case OCFS2_LOCK_TYPE_SUPER:
62
                        c = 'S';
63
                        break;
64
                case OCFS2_LOCK_TYPE_RENAME:
65
                        c = 'R';
66
                        break;
67
                case OCFS2_LOCK_TYPE_RW:
68
                        c = 'W';
69
                        break;
70
                case OCFS2_LOCK_TYPE_DENTRY:
71
                        c = 'N';
72
                        break;
73
                case OCFS2_LOCK_TYPE_OPEN:
74
                        c = 'O';
75
                        break;
76
                default:
77
                        c = '\0';
78
        }
79
 
80
        return c;
81
}
82
 
83
static char *ocfs2_lock_type_strings[] = {
84
        [OCFS2_LOCK_TYPE_META] = "Meta",
85
        [OCFS2_LOCK_TYPE_DATA] = "Data",
86
        [OCFS2_LOCK_TYPE_SUPER] = "Super",
87
        [OCFS2_LOCK_TYPE_RENAME] = "Rename",
88
        /* Need to differntiate from [R]ename.. serializing writes is the
89
         * important job it does, anyway. */
90
        [OCFS2_LOCK_TYPE_RW] = "Write/Read",
91
        [OCFS2_LOCK_TYPE_DENTRY] = "Dentry",
92
        [OCFS2_LOCK_TYPE_OPEN] = "Open",
93
};
94
 
95
static inline const char *ocfs2_lock_type_string(enum ocfs2_lock_type type)
96
{
97
#ifdef __KERNEL__
98
        mlog_bug_on_msg(type >= OCFS2_NUM_LOCK_TYPES, "%d\n", type);
99
#endif
100
        return ocfs2_lock_type_strings[type];
101
}
102
 
103
#endif  /* OCFS2_LOCKID_H */

powered by: WebSVN 2.1.0

© copyright 1999-2025 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.