FreeBSD/Linux Kernel Cross Reference
sys/ufs/ufs/dinode.h
1 /*
2 * Copyright (c) 2002 Networks Associates Technology, Inc.
3 * All rights reserved.
4 *
5 * This software was developed for the FreeBSD Project by Marshall
6 * Kirk McKusick and Network Associates Laboratories, the Security
7 * Research Division of Network Associates, Inc. under DARPA/SPAWAR
8 * contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS
9 * research program
10 *
11 * Copyright (c) 1982, 1989, 1993
12 * The Regents of the University of California. All rights reserved.
13 * (c) UNIX System Laboratories, Inc.
14 * All or some portions of this file are derived from material licensed
15 * to the University of California by American Telephone and Telegraph
16 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
17 * the permission of UNIX System Laboratories, Inc.
18 *
19 * Redistribution and use in source and binary forms, with or without
20 * modification, are permitted provided that the following conditions
21 * are met:
22 * 1. Redistributions of source code must retain the above copyright
23 * notice, this list of conditions and the following disclaimer.
24 * 2. Redistributions in binary form must reproduce the above copyright
25 * notice, this list of conditions and the following disclaimer in the
26 * documentation and/or other materials provided with the distribution.
27 * 3. The names of the authors may not be used to endorse or promote
28 * products derived from this software without specific prior written
29 * permission.
30 *
31 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
32 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
33 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
34 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
35 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
39 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
40 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
41 * SUCH DAMAGE.
42 *
43 * @(#)dinode.h 8.3 (Berkeley) 1/21/94
44 * $FreeBSD: releng/5.1/sys/ufs/ufs/dinode.h 100201 2002-07-16 22:36:00Z mckusick $
45 */
46
47 #ifndef _UFS_UFS_DINODE_H_
48 #define _UFS_UFS_DINODE_H_
49
50 /*
51 * The root inode is the root of the filesystem. Inode 0 can't be used for
52 * normal purposes and historically bad blocks were linked to inode 1, thus
53 * the root inode is 2. (Inode 1 is no longer used for this purpose, however
54 * numerous dump tapes make this assumption, so we are stuck with it).
55 */
56 #define ROOTINO ((ino_t)2)
57
58 /*
59 * The Whiteout inode# is a dummy non-zero inode number which will
60 * never be allocated to a real file. It is used as a place holder
61 * in the directory entry which has been tagged as a DT_W entry.
62 * See the comments about ROOTINO above.
63 */
64 #define WINO ((ino_t)1)
65
66 /*
67 * The size of physical and logical block numbers and time fields in UFS.
68 */
69 typedef int32_t ufs1_daddr_t;
70 typedef int64_t ufs2_daddr_t;
71 typedef int64_t ufs_lbn_t;
72 typedef int64_t ufs_time_t;
73
74 /* File permissions. */
75 #define IEXEC 0000100 /* Executable. */
76 #define IWRITE 0000200 /* Writeable. */
77 #define IREAD 0000400 /* Readable. */
78 #define ISVTX 0001000 /* Sticky bit. */
79 #define ISGID 0002000 /* Set-gid. */
80 #define ISUID 0004000 /* Set-uid. */
81
82 /* File types. */
83 #define IFMT 0170000 /* Mask of file type. */
84 #define IFIFO 0010000 /* Named pipe (fifo). */
85 #define IFCHR 0020000 /* Character device. */
86 #define IFDIR 0040000 /* Directory file. */
87 #define IFBLK 0060000 /* Block device. */
88 #define IFREG 0100000 /* Regular file. */
89 #define IFLNK 0120000 /* Symbolic link. */
90 #define IFSOCK 0140000 /* UNIX domain socket. */
91 #define IFWHT 0160000 /* Whiteout. */
92
93 /*
94 * A dinode contains all the meta-data associated with a UFS2 file.
95 * This structure defines the on-disk format of a dinode. Since
96 * this structure describes an on-disk structure, all its fields
97 * are defined by types with precise widths.
98 */
99
100 #define NXADDR 2 /* External addresses in inode. */
101 #define NDADDR 12 /* Direct addresses in inode. */
102 #define NIADDR 3 /* Indirect addresses in inode. */
103
104 struct ufs2_dinode {
105 u_int16_t di_mode; /* 0: IFMT, permissions; see below. */
106 int16_t di_nlink; /* 2: File link count. */
107 u_int32_t di_uid; /* 4: File owner. */
108 u_int32_t di_gid; /* 8: File group. */
109 u_int32_t di_blksize; /* 12: Inode blocksize. */
110 u_int64_t di_size; /* 16: File byte count. */
111 u_int64_t di_blocks; /* 24: Bytes actually held. */
112 ufs_time_t di_atime; /* 32: Last access time. */
113 ufs_time_t di_mtime; /* 40: Last modified time. */
114 ufs_time_t di_ctime; /* 48: Last inode change time. */
115 ufs_time_t di_birthtime; /* 56: Inode creation time. */
116 int32_t di_mtimensec; /* 64: Last modified time. */
117 int32_t di_atimensec; /* 68: Last access time. */
118 int32_t di_ctimensec; /* 72: Last inode change time. */
119 int32_t di_birthnsec; /* 76: Inode creation time. */
120 int32_t di_gen; /* 80: Generation number. */
121 u_int32_t di_kernflags; /* 84: Kernel flags. */
122 u_int32_t di_flags; /* 88: Status flags (chflags). */
123 int32_t di_extsize; /* 92: External attributes block. */
124 ufs2_daddr_t di_extb[NXADDR];/* 96: External attributes block. */
125 ufs2_daddr_t di_db[NDADDR]; /* 112: Direct disk blocks. */
126 ufs2_daddr_t di_ib[NIADDR]; /* 208: Indirect disk blocks. */
127 int64_t di_spare[3]; /* 232: Reserved; currently unused */
128 };
129
130 /*
131 * The di_db fields may be overlaid with other information for
132 * file types that do not have associated disk storage. Block
133 * and character devices overlay the first data block with their
134 * dev_t value. Short symbolic links place their path in the
135 * di_db area.
136 */
137 #define di_rdev di_db[0]
138
139 /*
140 * A UFS1 dinode contains all the meta-data associated with a UFS1 file.
141 * This structure defines the on-disk format of a UFS1 dinode. Since
142 * this structure describes an on-disk structure, all its fields
143 * are defined by types with precise widths.
144 */
145 struct ufs1_dinode {
146 u_int16_t di_mode; /* 0: IFMT, permissions; see below. */
147 int16_t di_nlink; /* 2: File link count. */
148 union {
149 u_int16_t oldids[2]; /* 4: Ffs: old user and group ids. */
150 } di_u;
151 u_int64_t di_size; /* 8: File byte count. */
152 int32_t di_atime; /* 16: Last access time. */
153 int32_t di_atimensec; /* 20: Last access time. */
154 int32_t di_mtime; /* 24: Last modified time. */
155 int32_t di_mtimensec; /* 28: Last modified time. */
156 int32_t di_ctime; /* 32: Last inode change time. */
157 int32_t di_ctimensec; /* 36: Last inode change time. */
158 ufs1_daddr_t di_db[NDADDR]; /* 40: Direct disk blocks. */
159 ufs1_daddr_t di_ib[NIADDR]; /* 88: Indirect disk blocks. */
160 u_int32_t di_flags; /* 100: Status flags (chflags). */
161 int32_t di_blocks; /* 104: Blocks actually held. */
162 int32_t di_gen; /* 108: Generation number. */
163 u_int32_t di_uid; /* 112: File owner. */
164 u_int32_t di_gid; /* 116: File group. */
165 int32_t di_spare[2]; /* 120: Reserved; currently unused */
166 };
167 #define di_ogid di_u.oldids[1]
168 #define di_ouid di_u.oldids[0]
169
170 #endif /* _UFS_UFS_DINODE_H_ */
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