aboutsummaryrefslogtreecommitdiff
path: root/sys/ufs/ufs/dinode.h
blob: 0a201ce0b43b5fbff93e49a834feb4f7d97f2f81 (plain) (blame)
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
184
185
186
187
188
189
190
191
192
193
/*-
 * SPDX-License-Identifier: (BSD-2-Clause-FreeBSD AND BSD-3-Clause)
 *
 * Copyright (c) 2002 Networks Associates Technology, Inc.
 * All rights reserved.
 *
 * This software was developed for the FreeBSD Project by Marshall
 * Kirk McKusick and Network Associates Laboratories, the Security
 * Research Division of Network Associates, Inc. under DARPA/SPAWAR
 * contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS
 * research program
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * Copyright (c) 1982, 1989, 1993
 *	The Regents of the University of California.  All rights reserved.
 * (c) UNIX System Laboratories, Inc.
 * All or some portions of this file are derived from material licensed
 * to the University of California by American Telephone and Telegraph
 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
 * the permission of UNIX System Laboratories, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The names of the authors may not be used to endorse or promote
 *    products derived from this software without specific prior written
 *    permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)dinode.h	8.3 (Berkeley) 1/21/94
 * $FreeBSD$
 */

#ifndef _UFS_UFS_DINODE_H_
#define	_UFS_UFS_DINODE_H_

/*
 * The root inode is the root of the filesystem.  Inode 0 can't be used for
 * normal purposes and historically bad blocks were linked to inode 1, thus
 * the root inode is 2.  (Inode 1 is no longer used for this purpose, however
 * numerous dump tapes make this assumption, so we are stuck with it).
 */
#define	UFS_ROOTINO	((ino_t)2)

/*
 * The Whiteout inode# is a dummy non-zero inode number which will
 * never be allocated to a real file.  It is used as a place holder
 * in the directory entry which has been tagged as a DT_WHT entry.
 * See the comments about UFS_ROOTINO above.
 */
#define	UFS_WINO	((ino_t)1)

/*
 * The size of physical and logical block numbers and time fields in UFS.
 */
typedef	int32_t	ufs1_daddr_t;
typedef	int64_t	ufs2_daddr_t;
typedef int64_t ufs_lbn_t;
typedef int64_t ufs_time_t;

/* File permissions. */
#define	IEXEC		0000100		/* Executable. */
#define	IWRITE		0000200		/* Writeable. */
#define	IREAD		0000400		/* Readable. */
#define	ISVTX		0001000		/* Sticky bit. */
#define	ISGID		0002000		/* Set-gid. */
#define	ISUID		0004000		/* Set-uid. */

/* File types. */
#define	IFMT		0170000		/* Mask of file type. */
#define	IFIFO		0010000		/* Named pipe (fifo). */
#define	IFCHR		0020000		/* Character device. */
#define	IFDIR		0040000		/* Directory file. */
#define	IFBLK		0060000		/* Block device. */
#define	IFREG		0100000		/* Regular file. */
#define	IFLNK		0120000		/* Symbolic link. */
#define	IFSOCK		0140000		/* UNIX domain socket. */
#define	IFWHT		0160000		/* Whiteout. */

/*
 * A dinode contains all the meta-data associated with a UFS2 file.
 * This structure defines the on-disk format of a dinode. Since
 * this structure describes an on-disk structure, all its fields
 * are defined by types with precise widths.
 */

#define	UFS_NXADDR	2		/* External addresses in inode. */
#define	UFS_NDADDR	12		/* Direct addresses in inode. */
#define	UFS_NIADDR	3		/* Indirect addresses in inode. */

struct ufs2_dinode {
	u_int16_t	di_mode;	/*   0: IFMT, permissions; see below. */
	int16_t		di_nlink;	/*   2: File link count. */
	u_int32_t	di_uid;		/*   4: File owner. */
	u_int32_t	di_gid;		/*   8: File group. */
	u_int32_t	di_blksize;	/*  12: Inode blocksize. */
	u_int64_t	di_size;	/*  16: File byte count. */
	u_int64_t	di_blocks;	/*  24: Blocks actually held. */
	ufs_time_t	di_atime;	/*  32: Last access time. */
	ufs_time_t	di_mtime;	/*  40: Last modified time. */
	ufs_time_t	di_ctime;	/*  48: Last inode change time. */
	ufs_time_t	di_birthtime;	/*  56: Inode creation time. */
	int32_t		di_mtimensec;	/*  64: Last modified time. */
	int32_t		di_atimensec;	/*  68: Last access time. */
	int32_t		di_ctimensec;	/*  72: Last inode change time. */
	int32_t		di_birthnsec;	/*  76: Inode creation time. */
	u_int32_t	di_gen;		/*  80: Generation number. */
	u_int32_t	di_kernflags;	/*  84: Kernel flags. */
	u_int32_t	di_flags;	/*  88: Status flags (chflags). */
	u_int32_t	di_extsize;	/*  92: External attributes size. */
	ufs2_daddr_t	di_extb[UFS_NXADDR];/* 96: External attributes block. */
	ufs2_daddr_t	di_db[UFS_NDADDR]; /* 112: Direct disk blocks. */
	ufs2_daddr_t	di_ib[UFS_NIADDR]; /* 208: Indirect disk blocks. */
	u_int64_t	di_modrev;	/* 232: i_modrev for NFSv4 */
	uint32_t	di_freelink;	/* 240: SUJ: Next unlinked inode. */
	uint32_t	di_spare[3];	/* 244: Reserved; currently unused */
};

/*
 * The di_db fields may be overlaid with other information for
 * file types that do not have associated disk storage. Block
 * and character devices overlay the first data block with their
 * dev_t value. Short symbolic links place their path in the
 * di_db area.
 */
#define	di_rdev di_db[0]

/*
 * A UFS1 dinode contains all the meta-data associated with a UFS1 file.
 * This structure defines the on-disk format of a UFS1 dinode. Since
 * this structure describes an on-disk structure, all its fields
 * are defined by types with precise widths.
 */
struct ufs1_dinode {
	u_int16_t	di_mode;	/*   0: IFMT, permissions; see below. */
	int16_t		di_nlink;	/*   2: File link count. */
	uint32_t	di_freelink;	/*   4: SUJ: Next unlinked inode. */
	u_int64_t	di_size;	/*   8: File byte count. */
	int32_t		di_atime;	/*  16: Last access time. */
	int32_t		di_atimensec;	/*  20: Last access time. */
	int32_t		di_mtime;	/*  24: Last modified time. */
	int32_t		di_mtimensec;	/*  28: Last modified time. */
	int32_t		di_ctime;	/*  32: Last inode change time. */
	int32_t		di_ctimensec;	/*  36: Last inode change time. */
	ufs1_daddr_t	di_db[UFS_NDADDR]; /*  40: Direct disk blocks. */
	ufs1_daddr_t	di_ib[UFS_NIADDR]; /*  88: Indirect disk blocks. */
	u_int32_t	di_flags;	/* 100: Status flags (chflags). */
	u_int32_t	di_blocks;	/* 104: Blocks actually held. */
	u_int32_t	di_gen;		/* 108: Generation number. */
	u_int32_t	di_uid;		/* 112: File owner. */
	u_int32_t	di_gid;		/* 116: File group. */
	u_int64_t	di_modrev;	/* 120: i_modrev for NFSv4 */
};

#define	UFS_LINK_MAX	32767

#endif /* _UFS_UFS_DINODE_H_ */