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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 IHIDDEN 0x04000000 /* hidden file */ |
143 | #define ISYSTEM 0x08000000 /* system file */ |
144 | |
145 | #define IDIRECTORY 0x20000000 /* directory (shadow of real bit) */ |
146 | #define IARCHIVE 0x40000000 /* file archive bit */ |
147 | #define INEWNAME 0x80000000 /* non-8.3 filename format */ |
148 | |
149 | #define IRASH 0x4E000000 /* mask for changeable attributes */ |
150 | #define ATTRSHIFT 25 /* bits to shift to move attribute |
151 | specification to mode position */ |
152 | |
153 | /* extended attributes for Linux */ |
154 | |
155 | #define JFS_NOATIME_FL 0x00080000 /* do not update atime */ |
156 | |
157 | #define JFS_DIRSYNC_FL 0x00100000 /* dirsync behaviour */ |
158 | #define JFS_SYNC_FL 0x00200000 /* Synchronous updates */ |
159 | #define JFS_SECRM_FL 0x00400000 /* Secure deletion */ |
160 | #define JFS_UNRM_FL 0x00800000 /* allow for undelete */ |
161 | |
162 | #define JFS_APPEND_FL 0x01000000 /* writes to file may only append */ |
163 | #define JFS_IMMUTABLE_FL 0x02000000 /* Immutable file */ |
164 | |
165 | #define JFS_FL_USER_VISIBLE 0x03F80000 |
166 | #define JFS_FL_USER_MODIFIABLE 0x03F80000 |
167 | #define JFS_FL_INHERIT 0x03C80000 |
168 | |
169 | /* These are identical to EXT[23]_IOC_GETFLAGS/SETFLAGS */ |
170 | #define JFS_IOC_GETFLAGS _IOR('f', 1, long) |
171 | #define JFS_IOC_SETFLAGS _IOW('f', 2, long) |
172 | |
173 | #define JFS_IOC_GETFLAGS32 _IOR('f', 1, int) |
174 | #define JFS_IOC_SETFLAGS32 _IOW('f', 2, int) |
175 | |
176 | #endif /*_H_JFS_DINODE */ |
177 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
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v3.9