1 /* SPDX-License-Identifier: GPL-2.0-only */ <<
2 /* 1 /*
3 * Copyright (c) 2000-2001 Christoph Hellwig. 2 * Copyright (c) 2000-2001 Christoph Hellwig.
>> 3 * All rights reserved.
>> 4 *
>> 5 * Redistribution and use in source and binary forms, with or without
>> 6 * modification, are permitted provided that the following conditions
>> 7 * are met:
>> 8 * 1. Redistributions of source code must retain the above copyright
>> 9 * notice, this list of conditions, and the following disclaimer,
>> 10 * without modification.
>> 11 * 2. The name of the author may not be used to endorse or promote products
>> 12 * derived from this software without specific prior written permission.
>> 13 *
>> 14 * Alternatively, this software may be distributed under the terms of the
>> 15 * GNU General Public License ("GPL").
>> 16 *
>> 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
>> 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>> 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
>> 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
>> 21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
>> 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
>> 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
>> 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
>> 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
>> 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
>> 27 * SUCH DAMAGE.
>> 28 *
4 */ 29 */
5 #ifndef _VXFS_OLT_H_ 30 #ifndef _VXFS_OLT_H_
6 #define _VXFS_OLT_H_ 31 #define _VXFS_OLT_H_
7 32
8 /* 33 /*
9 * Veritas filesystem driver - Object Location 34 * Veritas filesystem driver - Object Location Table data structures.
10 * 35 *
11 * This file contains definitions for the Obje 36 * This file contains definitions for the Object Location Table used
12 * by the Veritas Filesystem version 2 and new 37 * by the Veritas Filesystem version 2 and newer.
13 */ 38 */
14 39
15 40
16 /* 41 /*
17 * OLT magic number (vxfs_olt->olt_magic). 42 * OLT magic number (vxfs_olt->olt_magic).
18 */ 43 */
19 #define VXFS_OLT_MAGIC 0xa504FCF5 44 #define VXFS_OLT_MAGIC 0xa504FCF5
20 45
21 /* 46 /*
22 * VxFS OLT entry types. 47 * VxFS OLT entry types.
23 */ 48 */
24 enum { 49 enum {
25 VXFS_OLT_FREE = 1, 50 VXFS_OLT_FREE = 1,
26 VXFS_OLT_FSHEAD = 2, 51 VXFS_OLT_FSHEAD = 2,
27 VXFS_OLT_CUT = 3, 52 VXFS_OLT_CUT = 3,
28 VXFS_OLT_ILIST = 4, 53 VXFS_OLT_ILIST = 4,
29 VXFS_OLT_DEV = 5, 54 VXFS_OLT_DEV = 5,
30 VXFS_OLT_SB = 6 55 VXFS_OLT_SB = 6
31 }; 56 };
32 57
33 /* 58 /*
34 * VxFS OLT header. 59 * VxFS OLT header.
35 * 60 *
36 * The Object Location Table header is placed 61 * The Object Location Table header is placed at the beginning of each
37 * OLT extent. It is used to fing certain fil 62 * OLT extent. It is used to fing certain filesystem-wide metadata, e.g.
38 * the initial inode list, the fileset header 63 * the initial inode list, the fileset header or the device configuration.
39 */ 64 */
40 struct vxfs_olt { 65 struct vxfs_olt {
41 __fs32 olt_magic; /* mag 66 __fs32 olt_magic; /* magic number */
42 __fs32 olt_size; /* siz 67 __fs32 olt_size; /* size of this entry */
43 __fs32 olt_checksum; /* che 68 __fs32 olt_checksum; /* checksum of extent */
44 __u32 __unused1; /* ??? 69 __u32 __unused1; /* ??? */
45 __fs32 olt_mtime; /* tim 70 __fs32 olt_mtime; /* time of last mod. (sec) */
46 __fs32 olt_mutime; /* tim 71 __fs32 olt_mutime; /* time of last mod. (usec) */
47 __fs32 olt_totfree; /* fre 72 __fs32 olt_totfree; /* free space in OLT extent */
48 __fs32 olt_extents[2]; /* add 73 __fs32 olt_extents[2]; /* addr of this extent, replica */
49 __fs32 olt_esize; /* siz 74 __fs32 olt_esize; /* size of this extent */
50 __fs32 olt_next[2]; /* add 75 __fs32 olt_next[2]; /* addr of next extent, replica */
51 __fs32 olt_nsize; /* siz 76 __fs32 olt_nsize; /* size of next extent */
52 __u32 __unused2; /* ali 77 __u32 __unused2; /* align to 8 byte boundary */
53 }; 78 };
54 79
55 /* 80 /*
56 * VxFS common OLT entry (on disk). 81 * VxFS common OLT entry (on disk).
57 */ 82 */
58 struct vxfs_oltcommon { 83 struct vxfs_oltcommon {
59 __fs32 olt_type; /* typ 84 __fs32 olt_type; /* type of this record */
60 __fs32 olt_size; /* siz 85 __fs32 olt_size; /* size of this record */
61 }; 86 };
62 87
63 /* 88 /*
64 * VxFS free OLT entry (on disk). 89 * VxFS free OLT entry (on disk).
65 */ 90 */
66 struct vxfs_oltfree { 91 struct vxfs_oltfree {
67 __fs32 olt_type; /* typ 92 __fs32 olt_type; /* type of this record */
68 __fs32 olt_fsize; /* siz 93 __fs32 olt_fsize; /* size of this free record */
69 }; 94 };
70 95
71 /* 96 /*
72 * VxFS initial-inode list (on disk). 97 * VxFS initial-inode list (on disk).
73 */ 98 */
74 struct vxfs_oltilist { 99 struct vxfs_oltilist {
75 __fs32 olt_type; /* type of thi 100 __fs32 olt_type; /* type of this record */
76 __fs32 olt_size; /* size of thi 101 __fs32 olt_size; /* size of this record */
77 __fs32 olt_iext[2]; /* ini 102 __fs32 olt_iext[2]; /* initial inode list, replica */
78 }; 103 };
79 104
80 /* 105 /*
81 * Current Usage Table 106 * Current Usage Table
82 */ 107 */
83 struct vxfs_oltcut { 108 struct vxfs_oltcut {
84 __fs32 olt_type; /* typ 109 __fs32 olt_type; /* type of this record */
85 __fs32 olt_size; /* siz 110 __fs32 olt_size; /* size of this record */
86 __fs32 olt_cutino; /* ino 111 __fs32 olt_cutino; /* inode of current usage table */
87 __u8 __pad; /* unu 112 __u8 __pad; /* unused, 8 byte align */
88 }; 113 };
89 114
90 /* 115 /*
91 * Inodes containing Superblock, Intent log an 116 * Inodes containing Superblock, Intent log and OLTs
92 */ 117 */
93 struct vxfs_oltsb { 118 struct vxfs_oltsb {
94 __fs32 olt_type; /* typ 119 __fs32 olt_type; /* type of this record */
95 __fs32 olt_size; /* siz 120 __fs32 olt_size; /* size of this record */
96 __fs32 olt_sbino; /* ino 121 __fs32 olt_sbino; /* inode of superblock file */
97 __u32 __unused1; /* ??? 122 __u32 __unused1; /* ??? */
98 __fs32 olt_logino[2]; /* ino 123 __fs32 olt_logino[2]; /* inode of log file,replica */
99 __fs32 olt_oltino[2]; /* ino 124 __fs32 olt_oltino[2]; /* inode of OLT, replica */
100 }; 125 };
101 126
102 /* 127 /*
103 * Inode containing device configuration + it' 128 * Inode containing device configuration + it's replica
104 */ 129 */
105 struct vxfs_oltdev { 130 struct vxfs_oltdev {
106 __fs32 olt_type; /* typ 131 __fs32 olt_type; /* type of this record */
107 __fs32 olt_size; /* siz 132 __fs32 olt_size; /* size of this record */
108 __fs32 olt_devino[2]; /* ino 133 __fs32 olt_devino[2]; /* inode of device config files */
109 }; 134 };
110 135
111 /* 136 /*
112 * Fileset header 137 * Fileset header
113 */ 138 */
114 struct vxfs_oltfshead { 139 struct vxfs_oltfshead {
115 __fs32 olt_type; /* typ 140 __fs32 olt_type; /* type number */
116 __fs32 olt_size; /* siz 141 __fs32 olt_size; /* size of this record */
117 __fs32 olt_fsino[2]; /* ino 142 __fs32 olt_fsino[2]; /* inodes of fileset header */
118 }; 143 };
119 144
120 #endif /* _VXFS_OLT_H_ */ 145 #endif /* _VXFS_OLT_H_ */
121 146
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