FreeBSD/Linux Kernel Cross Reference
sys/ufs/ufs/dinode.h
1 /*-
2 * SPDX-License-Identifier: (BSD-2-Clause-FreeBSD AND BSD-3-Clause)
3 *
4 * Copyright (c) 2002 Networks Associates Technology, Inc.
5 * All rights reserved.
6 *
7 * This software was developed for the FreeBSD Project by Marshall
8 * Kirk McKusick and Network Associates Laboratories, the Security
9 * Research Division of Network Associates, Inc. under DARPA/SPAWAR
10 * contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS
11 * research program
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 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * Copyright (c) 1982, 1989, 1993
35 * The Regents of the University of California. All rights reserved.
36 * (c) UNIX System Laboratories, Inc.
37 * All or some portions of this file are derived from material licensed
38 * to the University of California by American Telephone and Telegraph
39 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
40 * the permission of UNIX System Laboratories, Inc.
41 *
42 * Redistribution and use in source and binary forms, with or without
43 * modification, are permitted provided that the following conditions
44 * are met:
45 * 1. Redistributions of source code must retain the above copyright
46 * notice, this list of conditions and the following disclaimer.
47 * 2. Redistributions in binary form must reproduce the above copyright
48 * notice, this list of conditions and the following disclaimer in the
49 * documentation and/or other materials provided with the distribution.
50 * 3. The names of the authors may not be used to endorse or promote
51 * products derived from this software without specific prior written
52 * permission.
53 *
54 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
57 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
64 * SUCH DAMAGE.
65 *
66 * @(#)dinode.h 8.3 (Berkeley) 1/21/94
67 * $FreeBSD$
68 */
69
70 #ifndef _UFS_UFS_DINODE_H_
71 #define _UFS_UFS_DINODE_H_
72
73 /*
74 * The root inode is the root of the filesystem. Inode 0 can't be used for
75 * normal purposes and historically bad blocks were linked to inode 1, thus
76 * the root inode is 2. (Inode 1 is no longer used for this purpose, however
77 * numerous dump tapes make this assumption, so we are stuck with it).
78 */
79 #define UFS_ROOTINO ((ino_t)2)
80
81 /*
82 * The Whiteout inode# is a dummy non-zero inode number which will
83 * never be allocated to a real file. It is used as a place holder
84 * in the directory entry which has been tagged as a DT_WHT entry.
85 * See the comments about UFS_ROOTINO above.
86 */
87 #define UFS_WINO ((ino_t)1)
88
89 /*
90 * The size of physical and logical block numbers and time fields in UFS.
91 */
92 typedef int32_t ufs1_daddr_t;
93 typedef int64_t ufs2_daddr_t;
94 typedef int64_t ufs_lbn_t;
95 typedef int64_t ufs_time_t;
96
97 /* File permissions. */
98 #define IEXEC 0000100 /* Executable. */
99 #define IWRITE 0000200 /* Writeable. */
100 #define IREAD 0000400 /* Readable. */
101 #define ISVTX 0001000 /* Sticky bit. */
102 #define ISGID 0002000 /* Set-gid. */
103 #define ISUID 0004000 /* Set-uid. */
104
105 /* File types. */
106 #define IFMT 0170000 /* Mask of file type. */
107 #define IFIFO 0010000 /* Named pipe (fifo). */
108 #define IFCHR 0020000 /* Character device. */
109 #define IFDIR 0040000 /* Directory file. */
110 #define IFBLK 0060000 /* Block device. */
111 #define IFREG 0100000 /* Regular file. */
112 #define IFLNK 0120000 /* Symbolic link. */
113 #define IFSOCK 0140000 /* UNIX domain socket. */
114 #define IFWHT 0160000 /* Whiteout. */
115
116 /*
117 * A dinode contains all the meta-data associated with a UFS2 file.
118 * This structure defines the on-disk format of a dinode. Since
119 * this structure describes an on-disk structure, all its fields
120 * are defined by types with precise widths.
121 */
122
123 #define UFS_NXADDR 2 /* External addresses in inode. */
124 #define UFS_NDADDR 12 /* Direct addresses in inode. */
125 #define UFS_NIADDR 3 /* Indirect addresses in inode. */
126
127 struct ufs2_dinode {
128 u_int16_t di_mode; /* 0: IFMT, permissions; see below. */
129 int16_t di_nlink; /* 2: File link count. */
130 u_int32_t di_uid; /* 4: File owner. */
131 u_int32_t di_gid; /* 8: File group. */
132 u_int32_t di_blksize; /* 12: Inode blocksize. */
133 u_int64_t di_size; /* 16: File byte count. */
134 u_int64_t di_blocks; /* 24: Blocks actually held. */
135 ufs_time_t di_atime; /* 32: Last access time. */
136 ufs_time_t di_mtime; /* 40: Last modified time. */
137 ufs_time_t di_ctime; /* 48: Last inode change time. */
138 ufs_time_t di_birthtime; /* 56: Inode creation time. */
139 int32_t di_mtimensec; /* 64: Last modified time. */
140 int32_t di_atimensec; /* 68: Last access time. */
141 int32_t di_ctimensec; /* 72: Last inode change time. */
142 int32_t di_birthnsec; /* 76: Inode creation time. */
143 u_int32_t di_gen; /* 80: Generation number. */
144 u_int32_t di_kernflags; /* 84: Kernel flags. */
145 u_int32_t di_flags; /* 88: Status flags (chflags). */
146 u_int32_t di_extsize; /* 92: External attributes size. */
147 ufs2_daddr_t di_extb[UFS_NXADDR];/* 96: External attributes block. */
148 ufs2_daddr_t di_db[UFS_NDADDR]; /* 112: Direct disk blocks. */
149 ufs2_daddr_t di_ib[UFS_NIADDR]; /* 208: Indirect disk blocks. */
150 u_int64_t di_modrev; /* 232: i_modrev for NFSv4 */
151 uint32_t di_freelink; /* 240: SUJ: Next unlinked inode. */
152 uint32_t di_spare[3]; /* 244: Reserved; currently unused */
153 };
154
155 /*
156 * The di_db fields may be overlaid with other information for
157 * file types that do not have associated disk storage. Block
158 * and character devices overlay the first data block with their
159 * dev_t value. Short symbolic links place their path in the
160 * di_db area.
161 */
162 #define di_rdev di_db[0]
163
164 /*
165 * A UFS1 dinode contains all the meta-data associated with a UFS1 file.
166 * This structure defines the on-disk format of a UFS1 dinode. Since
167 * this structure describes an on-disk structure, all its fields
168 * are defined by types with precise widths.
169 */
170 struct ufs1_dinode {
171 u_int16_t di_mode; /* 0: IFMT, permissions; see below. */
172 int16_t di_nlink; /* 2: File link count. */
173 uint32_t di_freelink; /* 4: SUJ: Next unlinked inode. */
174 u_int64_t di_size; /* 8: File byte count. */
175 int32_t di_atime; /* 16: Last access time. */
176 int32_t di_atimensec; /* 20: Last access time. */
177 int32_t di_mtime; /* 24: Last modified time. */
178 int32_t di_mtimensec; /* 28: Last modified time. */
179 int32_t di_ctime; /* 32: Last inode change time. */
180 int32_t di_ctimensec; /* 36: Last inode change time. */
181 ufs1_daddr_t di_db[UFS_NDADDR]; /* 40: Direct disk blocks. */
182 ufs1_daddr_t di_ib[UFS_NIADDR]; /* 88: Indirect disk blocks. */
183 u_int32_t di_flags; /* 100: Status flags (chflags). */
184 u_int32_t di_blocks; /* 104: Blocks actually held. */
185 u_int32_t di_gen; /* 108: Generation number. */
186 u_int32_t di_uid; /* 112: File owner. */
187 u_int32_t di_gid; /* 116: File group. */
188 u_int64_t di_modrev; /* 120: i_modrev for NFSv4 */
189 };
190
191 #define UFS_LINK_MAX 32767
192
193 #endif /* _UFS_UFS_DINODE_H_ */
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