1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 *   Copyright (C) International Business Machines Corp., 2000-2001
4 */
5#ifndef _H_JFS_DINODE
6#define _H_JFS_DINODE
7
8/*
9 *	jfs_dinode.h: on-disk inode manager
10 */
11
12#define INODESLOTSIZE		128
13#define L2INODESLOTSIZE		7
14#define log2INODESIZE		9	/* log2(bytes per dinode) */
15
16
17/*
18 *	on-disk inode : 512 bytes
19 *
20 * note: align 64-bit fields on 8-byte boundary.
21 */
22struct dinode {
23	/*
24	 *	I. base area (128 bytes)
25	 *	------------------------
26	 *
27	 * define generic/POSIX attributes
28	 */
29	__le32 di_inostamp;	/* 4: stamp to show inode belongs to fileset */
30	__le32 di_fileset;	/* 4: fileset number */
31	__le32 di_number;	/* 4: inode number, aka file serial number */
32	__le32 di_gen;		/* 4: inode generation number */
33
34	pxd_t di_ixpxd;		/* 8: inode extent descriptor */
35
36	__le64 di_size;		/* 8: size */
37	__le64 di_nblocks;	/* 8: number of blocks allocated */
38
39	__le32 di_nlink;	/* 4: number of links to the object */
40
41	__le32 di_uid;		/* 4: user id of owner */
42	__le32 di_gid;		/* 4: group id of owner */
43
44	__le32 di_mode;		/* 4: attribute, format and permission */
45
46	struct timestruc_t di_atime;	/* 8: time last data accessed */
47	struct timestruc_t di_ctime;	/* 8: time last status changed */
48	struct timestruc_t di_mtime;	/* 8: time last data modified */
49	struct timestruc_t di_otime;	/* 8: time created */
50
51	dxd_t di_acl;		/* 16: acl descriptor */
52
53	dxd_t di_ea;		/* 16: ea descriptor */
54
55	__le32 di_next_index;	/* 4: Next available dir_table index */
56
57	__le32 di_acltype;	/* 4: Type of ACL */
58
59	/*
60	 *	Extension Areas.
61	 *
62	 *	Historically, the inode was partitioned into 4 128-byte areas,
63	 *	the last 3 being defined as unions which could have multiple
64	 *	uses.  The first 96 bytes had been completely unused until
65	 *	an index table was added to the directory.  It is now more
66	 *	useful to describe the last 3/4 of the inode as a single
67	 *	union.  We would probably be better off redesigning the
68	 *	entire structure from scratch, but we don't want to break
69	 *	commonality with OS/2's JFS at this time.
70	 */
71	union {
72		struct {
73			/*
74			 * This table contains the information needed to
75			 * find a directory entry from a 32-bit index.
76			 * If the index is small enough, the table is inline,
77			 * otherwise, an x-tree root overlays this table
78			 */
79			struct dir_table_slot _table[12]; /* 96: inline */
80
81			dtroot_t _dtroot;		/* 288: dtree root */
82		} _dir;					/* (384) */
83#define di_dirtable	u._dir._table
84#define di_dtroot	u._dir._dtroot
85#define di_parent	di_dtroot.header.idotdot
86#define di_DASD		di_dtroot.header.DASD
87
88		struct {
89			union {
90				u8 _data[96];		/* 96: unused */
91				struct {
92					void *_imap;	/* 4: unused */
93					__le32 _gengen;	/* 4: generator */
94				} _imap;
95			} _u1;				/* 96: */
96#define di_gengen	u._file._u1._imap._gengen
97
98			union {
99				xtroot_t _xtroot;
100				struct {
101					u8 unused[16];	/* 16: */
102					dxd_t _dxd;	/* 16: */
103					union {
104						/*
105						 * The fast symlink area
106						 * is expected to overflow
107						 * into _inlineea when
108						 * needed (which will clear
109						 * INLINEEA).
110						 */
111						struct {
112							union {
113								__le32 _rdev;	/* 4: */
114								u8 _fastsymlink[128];
115							} _u;
116							u8 _inlineea[128];
117						};
118						u8 _inline_all[256];
119					};
120				} _special;
121			} _u2;
122		} _file;
123#define di_xtroot	u._file._u2._xtroot
124#define di_dxd		u._file._u2._special._dxd
125#define di_btroot	di_xtroot
126#define di_inlinedata	u._file._u2._special._u
127#define di_rdev		u._file._u2._special._u._rdev
128#define di_fastsymlink	u._file._u2._special._u._fastsymlink
129#define di_inlineea	u._file._u2._special._inlineea
130#define di_inline_all	u._file._u2._special._inline_all
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#endif /*_H_JFS_DINODE */
170