1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
6 * Defines OCFS2 lockid bits.
8 * Copyright (C) 2002, 2005 Oracle. All rights reserved.
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.
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.
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.
26 #ifndef OCFS2_LOCKID_H
27 #define OCFS2_LOCKID_H
29 /* lock ids are made up in the following manner:
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"
38 #define OCFS2_DENTRY_LOCK_INO_START 18
40 enum ocfs2_lock_type
{
41 OCFS2_LOCK_TYPE_META
= 0,
43 OCFS2_LOCK_TYPE_SUPER
,
44 OCFS2_LOCK_TYPE_RENAME
,
46 OCFS2_LOCK_TYPE_DENTRY
,
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
,
56 static inline char ocfs2_lock_type_char(enum ocfs2_lock_type type
)
60 case OCFS2_LOCK_TYPE_META
:
63 case OCFS2_LOCK_TYPE_DATA
:
66 case OCFS2_LOCK_TYPE_SUPER
:
69 case OCFS2_LOCK_TYPE_RENAME
:
72 case OCFS2_LOCK_TYPE_RW
:
75 case OCFS2_LOCK_TYPE_DENTRY
:
78 case OCFS2_LOCK_TYPE_OPEN
:
81 case OCFS2_LOCK_TYPE_FLOCK
:
84 case OCFS2_LOCK_TYPE_QINFO
:
87 case OCFS2_LOCK_TYPE_NFS_SYNC
:
90 case OCFS2_LOCK_TYPE_ORPHAN_SCAN
:
93 case OCFS2_LOCK_TYPE_REFCOUNT
:
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",
120 static inline const char *ocfs2_lock_type_string(enum ocfs2_lock_type type
)
123 BUG_ON(type
>= OCFS2_NUM_LOCK_TYPES
);
125 return ocfs2_lock_type_strings
[type
];
128 #endif /* OCFS2_LOCKID_H */