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 */
35struct 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
174#endif /*_H_JFS_DINODE */
175