dinode.h revision 1.11
1/*	$OpenBSD: dinode.h,v 1.11 2005/12/19 15:18:01 pedro Exp $	*/
2/*	$NetBSD: dinode.h,v 1.7 1995/06/15 23:22:48 cgd Exp $	*/
3
4/*
5 * Copyright (c) 1982, 1989, 1993
6 *	The Regents of the University of California.  All rights reserved.
7 * (c) UNIX System Laboratories, Inc.
8 * All or some portions of this file are derived from material licensed
9 * to the University of California by American Telephone and Telegraph
10 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
11 * the permission of UNIX System Laboratories, Inc.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 *    notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 *    notice, this list of conditions and the following disclaimer in the
20 *    documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its contributors
22 *    may be used to endorse or promote products derived from this software
23 *    without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 *	@(#)dinode.h	8.9 (Berkeley) 3/29/95
38 */
39
40#ifndef _UFS_DINODE_H_
41#define _UFS_DINODE_H_
42
43/*
44 * The root inode is the root of the file system.  Inode 0 can't be used for
45 * normal purposes and historically bad blocks were linked to inode 1, thus
46 * the root inode is 2.  (Inode 1 is no longer used for this purpose, however
47 * numerous dump tapes make this assumption, so we are stuck with it).
48 */
49#define	ROOTINO	((ino_t)2)
50
51/*
52 * A dinode contains all the meta-data associated with a UFS file.
53 * This structure defines the on-disk format of a dinode. Since
54 * this structure describes an on-disk structure, all its fields
55 * are defined by types with precise widths.
56 */
57
58typedef int32_t ufs_daddr_t;
59typedef int32_t ufs1_daddr_t;
60typedef int64_t ufs2_daddr_t;
61typedef int64_t ufs_lbn_t;
62typedef int64_t ufs_time_t;
63
64#define	NXADDR	2			/* External addresses in inode */
65#define	NDADDR	12			/* Direct addresses in inode. */
66#define	NIADDR	3			/* Indirect addresses in inode. */
67
68struct	ufs1_dinode {
69	u_int16_t	di_mode;	/*   0: IFMT, permissions; see below. */
70	int16_t		di_nlink;	/*   2: File link count. */
71	union {
72		u_int16_t oldids[2];	/*   4: Ffs: old user and group ids. */
73		u_int32_t inumber;	/*   4: Lfs: inode number. */
74	} di_u;
75	u_int64_t	di_size;	/*   8: File byte count. */
76	int32_t		di_atime;	/*  16: Last access time. */
77	int32_t		di_atimensec;	/*  20: Last access time. */
78	int32_t		di_mtime;	/*  24: Last modified time. */
79	int32_t		di_mtimensec;	/*  28: Last modified time. */
80	int32_t		di_ctime;	/*  32: Last inode change time. */
81	int32_t		di_ctimensec;	/*  36: Last inode change time. */
82	ufs1_daddr_t	di_db[NDADDR];	/*  40: Direct disk blocks. */
83	ufs1_daddr_t	di_ib[NIADDR];	/*  88: Indirect disk blocks. */
84	u_int32_t	di_flags;	/* 100: Status flags (chflags). */
85	int32_t		di_blocks;	/* 104: Blocks actually held. */
86	int32_t		di_gen;		/* 108: Generation number. */
87	u_int32_t	di_uid;		/* 112: File owner. */
88	u_int32_t	di_gid;		/* 116: File group. */
89	int32_t		di_spare[2];	/* 120: Reserved; currently unused */
90};
91
92struct ufs2_dinode {
93	u_int16_t	di_mode;	/*   0: IFMT, permissions; see below. */
94	int16_t		di_nlink;	/*   2: File link count. */
95	u_int32_t	di_uid;		/*   4: File owner. */
96	u_int32_t	di_gid;		/*   8: File group. */
97	u_int32_t	di_blksize;	/*  12: Inode blocksize. */
98	u_int64_t	di_size;	/*  16: File byte count. */
99	u_int64_t	di_blocks;	/*  24: Bytes actually held. */
100	ufs_time_t	di_atime;	/*  32: Last access time. */
101	ufs_time_t	di_mtime;	/*  40: Last modified time. */
102	ufs_time_t	di_ctime;	/*  48: Last inode change time. */
103	ufs_time_t	di_birthtime;	/*  56: Inode creation time. */
104	int32_t		di_mtimensec;	/*  64: Last modified time. */
105	int32_t		di_atimensec;	/*  68: Last access time. */
106	int32_t		di_ctimensec;	/*  72: Last inode change time. */
107	int32_t		di_birthnsec;	/*  76: Inode creation time. */
108	int32_t		di_gen;		/*  80: Generation number. */
109	u_int32_t	di_kernflags;	/*  84: Kernel flags. */
110	u_int32_t	di_flags;	/*  88: Status flags (chflags). */
111	int32_t		di_extsize;	/*  92: External attributes block. */
112	ufs2_daddr_t	di_extb[NXADDR];/*  96: External attributes block. */
113	ufs2_daddr_t	di_db[NDADDR];	/* 112: Direct disk blocks. */
114	ufs2_daddr_t	di_ib[NIADDR];	/* 208: Indirect disk blocks. */
115	int64_t		di_spare[3];	/* 232: Reserved; currently unused */
116};
117
118/*
119 * The di_db fields may be overlaid with other information for
120 * file types that do not have associated disk storage. Block
121 * and character devices overlay the first data block with their
122 * dev_t value. Short symbolic links place their path in the
123 * di_db area.
124 */
125#define	di_inumber	di_u.inumber
126#define	di_ogid		di_u.oldids[1]
127#define	di_ouid		di_u.oldids[0]
128#define	di_rdev		di_db[0]
129#define	di_shortlink	di_db
130
131#define MAXSYMLINKLEN_UFS1	((NDADDR + NIADDR) * sizeof(ufs1_daddr_t))
132#define MAXSYMLINKLEN_UFS2	((NDADDR + NIADDR) * sizeof(ufs2_daddr_t))
133
134#define MAXSYMLINKLEN(ip) \
135	((ip)->i_ump->um_fstype == UM_UFS1) ? \
136	MAXSYMLINKLEN_UFS1 : MAXSYMLINKLEN_UFS2
137
138/* File permissions. */
139#define	IEXEC		0000100		/* Executable. */
140#define	IWRITE		0000200		/* Writeable. */
141#define	IREAD		0000400		/* Readable. */
142#define	ISVTX		0001000		/* Sticky bit. */
143#define	ISGID		0002000		/* Set-gid. */
144#define	ISUID		0004000		/* Set-uid. */
145
146/* File types. */
147#define	IFMT		0170000		/* Mask of file type. */
148#define	IFIFO		0010000		/* Named pipe (fifo). */
149#define	IFCHR		0020000		/* Character device. */
150#define	IFDIR		0040000		/* Directory file. */
151#define	IFBLK		0060000		/* Block device. */
152#define	IFREG		0100000		/* Regular file. */
153#define	IFLNK		0120000		/* Symbolic link. */
154#define	IFSOCK		0140000		/* UNIX domain socket. */
155#define	IFWHT		0160000		/* Whiteout. */
156
157#endif /* _UFS_DINODE_H_ */
158