1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * Copyright (c) 2000-2001 Christoph Hellwig.
4 */
5 #ifndef _VXFS_OLT_H_
6 #define _VXFS_OLT_H_
7
8 /*
9 * Veritas filesystem driver - Object Location Table data structures.
10 *
11 * This file contains definitions for the Object Location Table used
12 * by the Veritas Filesystem version 2 and newer.
13 */
14
15
16 /*
17 * OLT magic number (vxfs_olt->olt_magic).
18 */
19 #define VXFS_OLT_MAGIC 0xa504FCF5
20
21 /*
22 * VxFS OLT entry types.
23 */
24 enum {
25 VXFS_OLT_FREE = 1,
26 VXFS_OLT_FSHEAD = 2,
27 VXFS_OLT_CUT = 3,
28 VXFS_OLT_ILIST = 4,
29 VXFS_OLT_DEV = 5,
30 VXFS_OLT_SB = 6
31 };
32
33 /*
34 * VxFS OLT header.
35 *
36 * The Object Location Table header is placed at the beginning of each
37 * OLT extent. It is used to fing certain filesystem-wide metadata, e.g.
38 * the initial inode list, the fileset header or the device configuration.
39 */
40 struct vxfs_olt {
41 __fs32 olt_magic; /* magic number */
42 __fs32 olt_size; /* size of this entry */
43 __fs32 olt_checksum; /* checksum of extent */
44 __u32 __unused1; /* ??? */
45 __fs32 olt_mtime; /* time of last mod. (sec) */
46 __fs32 olt_mutime; /* time of last mod. (usec) */
47 __fs32 olt_totfree; /* free space in OLT extent */
48 __fs32 olt_extents[2]; /* addr of this extent, replica */
49 __fs32 olt_esize; /* size of this extent */
50 __fs32 olt_next[2]; /* addr of next extent, replica */
51 __fs32 olt_nsize; /* size of next extent */
52 __u32 __unused2; /* align to 8 byte boundary */
53 };
54
55 /*
56 * VxFS common OLT entry (on disk).
57 */
58 struct vxfs_oltcommon {
59 __fs32 olt_type; /* type of this record */
60 __fs32 olt_size; /* size of this record */
61 };
62
63 /*
64 * VxFS free OLT entry (on disk).
65 */
66 struct vxfs_oltfree {
67 __fs32 olt_type; /* type of this record */
68 __fs32 olt_fsize; /* size of this free record */
69 };
70
71 /*
72 * VxFS initial-inode list (on disk).
73 */
74 struct vxfs_oltilist {
75 __fs32 olt_type; /* type of this record */
76 __fs32 olt_size; /* size of this record */
77 __fs32 olt_iext[2]; /* initial inode list, replica */
78 };
79
80 /*
81 * Current Usage Table
82 */
83 struct vxfs_oltcut {
84 __fs32 olt_type; /* type of this record */
85 __fs32 olt_size; /* size of this record */
86 __fs32 olt_cutino; /* inode of current usage table */
87 __u8 __pad; /* unused, 8 byte align */
88 };
89
90 /*
91 * Inodes containing Superblock, Intent log and OLTs
92 */
93 struct vxfs_oltsb {
94 __fs32 olt_type; /* type of this record */
95 __fs32 olt_size; /* size of this record */
96 __fs32 olt_sbino; /* inode of superblock file */
97 __u32 __unused1; /* ??? */
98 __fs32 olt_logino[2]; /* inode of log file,replica */
99 __fs32 olt_oltino[2]; /* inode of OLT, replica */
100 };
101
102 /*
103 * Inode containing device configuration + it's replica
104 */
105 struct vxfs_oltdev {
106 __fs32 olt_type; /* type of this record */
107 __fs32 olt_size; /* size of this record */
108 __fs32 olt_devino[2]; /* inode of device config files */
109 };
110
111 /*
112 * Fileset header
113 */
114 struct vxfs_oltfshead {
115 __fs32 olt_type; /* type number */
116 __fs32 olt_size; /* size of this record */
117 __fs32 olt_fsino[2]; /* inodes of fileset header */
118 };
119
120 #endif /* _VXFS_OLT_H_ */
121
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