1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
/*
* Copyright (c) 2000-2001 Christoph Hellwig.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL").
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#ifndef _VXFS_OLT_H_
#define _VXFS_OLT_H_
/*
* Veritas filesystem driver - Object Location Table data structures.
*
* This file contains definitions for the Object Location Table used
* by the Veritas Filesystem version 2 and newer.
*/
/*
* OLT magic number (vxfs_olt->olt_magic).
*/
#define VXFS_OLT_MAGIC 0xa504FCF5
/*
* VxFS OLT entry types.
*/
enum {
VXFS_OLT_FREE = 1,
VXFS_OLT_FSHEAD = 2,
VXFS_OLT_CUT = 3,
VXFS_OLT_ILIST = 4,
VXFS_OLT_DEV = 5,
VXFS_OLT_SB = 6
};
/*
* VxFS OLT header.
*
* The Object Location Table header is placed at the beginning of each
* OLT extent. It is used to fing certain filesystem-wide metadata, e.g.
* the initial inode list, the fileset header or the device configuration.
*/
struct vxfs_olt {
u_int32_t olt_magic; /* magic number */
u_int32_t olt_size; /* size of this entry */
u_int32_t olt_checksum; /* checksum of extent */
u_int32_t __unused1; /* ??? */
u_int32_t olt_mtime; /* time of last mod. (sec) */
u_int32_t olt_mutime; /* time of last mod. (usec) */
u_int32_t olt_totfree; /* free space in OLT extent */
vx_daddr_t olt_extents[2]; /* addr of this extent, replica */
u_int32_t olt_esize; /* size of this extent */
vx_daddr_t olt_next[2]; /* addr of next extent, replica */
u_int32_t olt_nsize; /* size of next extent */
u_int32_t __unused2; /* align to 8 byte boundary */
};
/*
* VxFS common OLT entry (on disk).
*/
struct vxfs_oltcommon {
u_int32_t olt_type; /* type of this record */
u_int32_t olt_size; /* size of this record */
};
/*
* VxFS free OLT entry (on disk).
*/
struct vxfs_oltfree {
u_int32_t olt_type; /* type of this record */
u_int32_t olt_fsize; /* size of this free record */
};
/*
* VxFS initial-inode list (on disk).
*/
struct vxfs_oltilist {
u_int32_t olt_type; /* type of this record */
u_int32_t olt_size; /* size of this record */
vx_ino_t olt_iext[2]; /* initial inode list, replica */
};
/*
* Current Usage Table
*/
struct vxfs_oltcut {
u_int32_t olt_type; /* type of this record */
u_int32_t olt_size; /* size of this record */
vx_ino_t olt_cutino; /* inode of current usage table */
u_int32_t __pad; /* unused, 8 byte align */
};
/*
* Inodes containing Superblock, Intent log and OLTs
*/
struct vxfs_oltsb {
u_int32_t olt_type; /* type of this record */
u_int32_t olt_size; /* size of this record */
vx_ino_t olt_sbino; /* inode of superblock file */
u_int32_t __unused1; /* ??? */
vx_ino_t olt_logino[2]; /* inode of log file,replica */
vx_ino_t olt_oltino[2]; /* inode of OLT, replica */
};
/*
* Inode containing device configuration + it's replica
*/
struct vxfs_oltdev {
u_int32_t olt_type; /* type of this record */
u_int32_t olt_size; /* size of this record */
vx_ino_t olt_devino[2]; /* inode of device config files */
};
/*
* Fileset header
*/
struct vxfs_oltfshead {
u_int32_t olt_type; /* type number */
u_int32_t olt_size; /* size of this record */
vx_ino_t olt_fsino[2]; /* inodes of fileset header */
};
#endif /* _VXFS_OLT_H_ */
|
