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