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1 | /* |
2 | * Copyright (c) International Business Machines Corp., 2000-2001 | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
12 | * the GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
17 | */ | |
18 | #ifndef _H_JFS_DINODE | |
19 | #define _H_JFS_DINODE | |
20 | ||
21 | /* | |
22 | * jfs_dinode.h: on-disk inode manager | |
23 | */ | |
24 | ||
25 | #define INODESLOTSIZE 128 | |
26 | #define L2INODESLOTSIZE 7 | |
27 | #define log2INODESIZE 9 /* log2(bytes per dinode) */ | |
28 | ||
29 | ||
30 | /* | |
31 | * on-disk inode : 512 bytes | |
32 | * | |
33 | * note: align 64-bit fields on 8-byte boundary. | |
34 | */ | |
35 | struct dinode { | |
36 | /* | |
37 | * I. base area (128 bytes) | |
38 | * ------------------------ | |
39 | * | |
40 | * define generic/POSIX attributes | |
41 | */ | |
42 | __le32 di_inostamp; /* 4: stamp to show inode belongs to fileset */ | |
43 | __le32 di_fileset; /* 4: fileset number */ | |
44 | __le32 di_number; /* 4: inode number, aka file serial number */ | |
45 | __le32 di_gen; /* 4: inode generation number */ | |
46 | ||
47 | pxd_t di_ixpxd; /* 8: inode extent descriptor */ | |
48 | ||
49 | __le64 di_size; /* 8: size */ | |
50 | __le64 di_nblocks; /* 8: number of blocks allocated */ | |
51 | ||
52 | __le32 di_nlink; /* 4: number of links to the object */ | |
53 | ||
54 | __le32 di_uid; /* 4: user id of owner */ | |
55 | __le32 di_gid; /* 4: group id of owner */ | |
56 | ||
57 | __le32 di_mode; /* 4: attribute, format and permission */ | |
58 | ||
59 | struct timestruc_t di_atime; /* 8: time last data accessed */ | |
60 | struct timestruc_t di_ctime; /* 8: time last status changed */ | |
61 | struct timestruc_t di_mtime; /* 8: time last data modified */ | |
62 | struct timestruc_t di_otime; /* 8: time created */ | |
63 | ||
64 | dxd_t di_acl; /* 16: acl descriptor */ | |
65 | ||
66 | dxd_t di_ea; /* 16: ea descriptor */ | |
67 | ||
68 | __le32 di_next_index; /* 4: Next available dir_table index */ | |
69 | ||
70 | __le32 di_acltype; /* 4: Type of ACL */ | |
71 | ||
72 | /* | |
73 | * Extension Areas. | |
74 | * | |
75 | * Historically, the inode was partitioned into 4 128-byte areas, | |
76 | * the last 3 being defined as unions which could have multiple | |
77 | * uses. The first 96 bytes had been completely unused until | |
78 | * an index table was added to the directory. It is now more | |
79 | * useful to describe the last 3/4 of the inode as a single | |
80 | * union. We would probably be better off redesigning the | |
81 | * entire structure from scratch, but we don't want to break | |
82 | * commonality with OS/2's JFS at this time. | |
83 | */ | |
84 | union { | |
85 | struct { | |
86 | /* | |
87 | * This table contains the information needed to | |
88 | * find a directory entry from a 32-bit index. | |
89 | * If the index is small enough, the table is inline, | |
90 | * otherwise, an x-tree root overlays this table | |
91 | */ | |
92 | struct dir_table_slot _table[12]; /* 96: inline */ | |
93 | ||
94 | dtroot_t _dtroot; /* 288: dtree root */ | |
95 | } _dir; /* (384) */ | |
96 | #define di_dirtable u._dir._table | |
97 | #define di_dtroot u._dir._dtroot | |
98 | #define di_parent di_dtroot.header.idotdot | |
99 | #define di_DASD di_dtroot.header.DASD | |
100 | ||
101 | struct { | |
102 | union { | |
103 | u8 _data[96]; /* 96: unused */ | |
104 | struct { | |
105 | void *_imap; /* 4: unused */ | |
106 | __le32 _gengen; /* 4: generator */ | |
107 | } _imap; | |
108 | } _u1; /* 96: */ | |
109 | #define di_gengen u._file._u1._imap._gengen | |
110 | ||
111 | union { | |
112 | xtpage_t _xtroot; | |
113 | struct { | |
114 | u8 unused[16]; /* 16: */ | |
115 | dxd_t _dxd; /* 16: */ | |
116 | union { | |
117 | __le32 _rdev; /* 4: */ | |
118 | u8 _fastsymlink[128]; | |
119 | } _u; | |
120 | u8 _inlineea[128]; | |
121 | } _special; | |
122 | } _u2; | |
123 | } _file; | |
124 | #define di_xtroot u._file._u2._xtroot | |
125 | #define di_dxd u._file._u2._special._dxd | |
126 | #define di_btroot di_xtroot | |
127 | #define di_inlinedata u._file._u2._special._u | |
128 | #define di_rdev u._file._u2._special._u._rdev | |
129 | #define di_fastsymlink u._file._u2._special._u._fastsymlink | |
130 | #define di_inlineea u._file._u2._special._inlineea | |
131 | } u; | |
132 | }; | |
133 | ||
134 | /* extended mode bits (on-disk inode di_mode) */ | |
135 | #define IFJOURNAL 0x00010000 /* journalled file */ | |
136 | #define ISPARSE 0x00020000 /* sparse file enabled */ | |
137 | #define INLINEEA 0x00040000 /* inline EA area free */ | |
138 | #define ISWAPFILE 0x00800000 /* file open for pager swap space */ | |
139 | ||
140 | /* more extended mode bits: attributes for OS/2 */ | |
141 | #define IREADONLY 0x02000000 /* no write access to file */ | |
142 | #define IARCHIVE 0x40000000 /* file archive bit */ | |
143 | #define ISYSTEM 0x08000000 /* system file */ | |
144 | #define IHIDDEN 0x04000000 /* hidden file */ | |
145 | #define IRASH 0x4E000000 /* mask for changeable attributes */ | |
146 | #define INEWNAME 0x80000000 /* non-8.3 filename format */ | |
147 | #define IDIRECTORY 0x20000000 /* directory (shadow of real bit) */ | |
148 | #define ATTRSHIFT 25 /* bits to shift to move attribute | |
149 | specification to mode position */ | |
150 | ||
151 | #endif /*_H_JFS_DINODE */ |