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
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
/*
* Copyright (C) International Business Machines Corp., 2000-2001
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
* the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _H_JFS_DINODE
#define _H_JFS_DINODE
/*
* jfs_dinode.h: on-disk inode manager
*/
#define INODESLOTSIZE 128
#define L2INODESLOTSIZE 7
#define log2INODESIZE 9 /* log2(bytes per dinode) */
/*
* on-disk inode : 512 bytes
*
* note: align 64-bit fields on 8-byte boundary.
*/
struct dinode {
/*
* I. base area (128 bytes)
* ------------------------
*
* define generic/POSIX attributes
*/
__le32 di_inostamp; /* 4: stamp to show inode belongs to fileset */
__le32 di_fileset; /* 4: fileset number */
__le32 di_number; /* 4: inode number, aka file serial number */
__le32 di_gen; /* 4: inode generation number */
pxd_t di_ixpxd; /* 8: inode extent descriptor */
__le64 di_size; /* 8: size */
__le64 di_nblocks; /* 8: number of blocks allocated */
__le32 di_nlink; /* 4: number of links to the object */
__le32 di_uid; /* 4: user id of owner */
__le32 di_gid; /* 4: group id of owner */
__le32 di_mode; /* 4: attribute, format and permission */
struct timestruc_t di_atime; /* 8: time last data accessed */
struct timestruc_t di_ctime; /* 8: time last status changed */
struct timestruc_t di_mtime; /* 8: time last data modified */
struct timestruc_t di_otime; /* 8: time created */
dxd_t di_acl; /* 16: acl descriptor */
dxd_t di_ea; /* 16: ea descriptor */
__le32 di_next_index; /* 4: Next available dir_table index */
__le32 di_acltype; /* 4: Type of ACL */
/*
* Extension Areas.
*
* Historically, the inode was partitioned into 4 128-byte areas,
* the last 3 being defined as unions which could have multiple
* uses. The first 96 bytes had been completely unused until
* an index table was added to the directory. It is now more
* useful to describe the last 3/4 of the inode as a single
* union. We would probably be better off redesigning the
* entire structure from scratch, but we don't want to break
* commonality with OS/2's JFS at this time.
*/
union {
struct {
/*
* This table contains the information needed to
* find a directory entry from a 32-bit index.
* If the index is small enough, the table is inline,
* otherwise, an x-tree root overlays this table
*/
struct dir_table_slot _table[12]; /* 96: inline */
dtroot_t _dtroot; /* 288: dtree root */
} _dir; /* (384) */
#define di_dirtable u._dir._table
#define di_dtroot u._dir._dtroot
#define di_parent di_dtroot.header.idotdot
#define di_DASD di_dtroot.header.DASD
struct {
union {
u8 _data[96]; /* 96: unused */
struct {
void *_imap; /* 4: unused */
__le32 _gengen; /* 4: generator */
} _imap;
} _u1; /* 96: */
#define di_gengen u._file._u1._imap._gengen
union {
xtpage_t _xtroot;
struct {
u8 unused[16]; /* 16: */
dxd_t _dxd; /* 16: */
union {
__le32 _rdev; /* 4: */
/*
* The fast symlink area
* is expected to overflow
* into _inlineea when
* needed (which will clear
* INLINEEA).
*/
u8 _fastsymlink[128];
} _u;
u8 _inlineea[128];
} _special;
} _u2;
} _file;
#define di_xtroot u._file._u2._xtroot
#define di_dxd u._file._u2._special._dxd
#define di_btroot di_xtroot
#define di_inlinedata u._file._u2._special._u
#define di_rdev u._file._u2._special._u._rdev
#define di_fastsymlink u._file._u2._special._u._fastsymlink
#define di_inlineea u._file._u2._special._inlineea
} u;
};
/* extended mode bits (on-disk inode di_mode) */
#define IFJOURNAL 0x00010000 /* journalled file */
#define ISPARSE 0x00020000 /* sparse file enabled */
#define INLINEEA 0x00040000 /* inline EA area free */
#define ISWAPFILE 0x00800000 /* file open for pager swap space */
/* more extended mode bits: attributes for OS/2 */
#define IREADONLY 0x02000000 /* no write access to file */
#define IHIDDEN 0x04000000 /* hidden file */
#define ISYSTEM 0x08000000 /* system file */
#define IDIRECTORY 0x20000000 /* directory (shadow of real bit) */
#define IARCHIVE 0x40000000 /* file archive bit */
#define INEWNAME 0x80000000 /* non-8.3 filename format */
#define IRASH 0x4E000000 /* mask for changeable attributes */
#define ATTRSHIFT 25 /* bits to shift to move attribute
specification to mode position */
/* extended attributes for Linux */
#define JFS_NOATIME_FL 0x00080000 /* do not update atime */
#define JFS_DIRSYNC_FL 0x00100000 /* dirsync behaviour */
#define JFS_SYNC_FL 0x00200000 /* Synchronous updates */
#define JFS_SECRM_FL 0x00400000 /* Secure deletion */
#define JFS_UNRM_FL 0x00800000 /* allow for undelete */
#define JFS_APPEND_FL 0x01000000 /* writes to file may only append */
#define JFS_IMMUTABLE_FL 0x02000000 /* Immutable file */
#define JFS_FL_USER_VISIBLE 0x03F80000
#define JFS_FL_USER_MODIFIABLE 0x03F80000
#define JFS_FL_INHERIT 0x03C80000
/* These are identical to EXT[23]_IOC_GETFLAGS/SETFLAGS */
#define JFS_IOC_GETFLAGS _IOR('f', 1, long)
#define JFS_IOC_SETFLAGS _IOW('f', 2, long)
#define JFS_IOC_GETFLAGS32 _IOR('f', 1, int)
#define JFS_IOC_SETFLAGS32 _IOW('f', 2, int)
#endif /*_H_JFS_DINODE */
|
