1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /* -*- mode: c; c-basic-offset: 8; -*-
3 * vim: noexpandtab sw=8 ts=8 sts=0:
4 *
5 * ocfs2_lockid.h
6 *
7 * Defines OCFS2 lockid bits.
8 *
9 * Copyright (C) 2002, 2005 Oracle. All rights reserved.
10 */
11
12 #ifndef OCFS2_LOCKID_H
13 #define OCFS2_LOCKID_H
14
15 /* lock ids are made up in the following manner:
16 * name[0] --> type
17 * name[1-6] --> 6 pad characters, reserved for now
18 * name[7-22] --> block number, expressed in hex as 16 chars
19 * name[23-30] --> i_generation, expressed in hex 8 chars
20 * name[31] --> '\0' */
21 #define OCFS2_LOCK_ID_MAX_LEN 32
22 #define OCFS2_LOCK_ID_PAD "000000"
23
24 #define OCFS2_DENTRY_LOCK_INO_START 18
25
26 enum ocfs2_lock_type {
27 OCFS2_LOCK_TYPE_META = 0,
28 OCFS2_LOCK_TYPE_DATA,
29 OCFS2_LOCK_TYPE_SUPER,
30 OCFS2_LOCK_TYPE_RENAME,
31 OCFS2_LOCK_TYPE_RW,
32 OCFS2_LOCK_TYPE_DENTRY,
33 OCFS2_LOCK_TYPE_OPEN,
34 OCFS2_LOCK_TYPE_FLOCK,
35 OCFS2_LOCK_TYPE_QINFO,
36 OCFS2_LOCK_TYPE_NFS_SYNC,
37 OCFS2_LOCK_TYPE_ORPHAN_SCAN,
38 OCFS2_LOCK_TYPE_REFCOUNT,
39 OCFS2_LOCK_TYPE_TRIM_FS,
40 OCFS2_NUM_LOCK_TYPES
41 };
42
ocfs2_lock_type_char(enum ocfs2_lock_type type)43 static inline char ocfs2_lock_type_char(enum ocfs2_lock_type type)
44 {
45 char c;
46 switch (type) {
47 case OCFS2_LOCK_TYPE_META:
48 c = 'M';
49 break;
50 case OCFS2_LOCK_TYPE_DATA:
51 c = 'D';
52 break;
53 case OCFS2_LOCK_TYPE_SUPER:
54 c = 'S';
55 break;
56 case OCFS2_LOCK_TYPE_RENAME:
57 c = 'R';
58 break;
59 case OCFS2_LOCK_TYPE_RW:
60 c = 'W';
61 break;
62 case OCFS2_LOCK_TYPE_DENTRY:
63 c = 'N';
64 break;
65 case OCFS2_LOCK_TYPE_OPEN:
66 c = 'O';
67 break;
68 case OCFS2_LOCK_TYPE_FLOCK:
69 c = 'F';
70 break;
71 case OCFS2_LOCK_TYPE_QINFO:
72 c = 'Q';
73 break;
74 case OCFS2_LOCK_TYPE_NFS_SYNC:
75 c = 'Y';
76 break;
77 case OCFS2_LOCK_TYPE_ORPHAN_SCAN:
78 c = 'P';
79 break;
80 case OCFS2_LOCK_TYPE_REFCOUNT:
81 c = 'T';
82 break;
83 case OCFS2_LOCK_TYPE_TRIM_FS:
84 c = 'I';
85 break;
86 default:
87 c = '\0';
88 }
89
90 return c;
91 }
92
93 static char *ocfs2_lock_type_strings[] = {
94 [OCFS2_LOCK_TYPE_META] = "Meta",
95 [OCFS2_LOCK_TYPE_DATA] = "Data",
96 [OCFS2_LOCK_TYPE_SUPER] = "Super",
97 [OCFS2_LOCK_TYPE_RENAME] = "Rename",
98 /* Need to differntiate from [R]ename.. serializing writes is the
99 * important job it does, anyway. */
100 [OCFS2_LOCK_TYPE_RW] = "Write/Read",
101 [OCFS2_LOCK_TYPE_DENTRY] = "Dentry",
102 [OCFS2_LOCK_TYPE_OPEN] = "Open",
103 [OCFS2_LOCK_TYPE_FLOCK] = "Flock",
104 [OCFS2_LOCK_TYPE_QINFO] = "Quota",
105 [OCFS2_LOCK_TYPE_NFS_SYNC] = "NFSSync",
106 [OCFS2_LOCK_TYPE_ORPHAN_SCAN] = "OrphanScan",
107 [OCFS2_LOCK_TYPE_REFCOUNT] = "Refcount",
108 [OCFS2_LOCK_TYPE_TRIM_FS] = "TrimFs",
109 };
110
ocfs2_lock_type_string(enum ocfs2_lock_type type)111 static inline const char *ocfs2_lock_type_string(enum ocfs2_lock_type type)
112 {
113 #ifdef __KERNEL__
114 BUG_ON(type >= OCFS2_NUM_LOCK_TYPES);
115 #endif
116 return ocfs2_lock_type_strings[type];
117 }
118
119 #endif /* OCFS2_LOCKID_H */
120
