1 /* $OpenBSD: dinode.h,v 1.17 2007/06/02 01:32:04 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 #define NXADDR 2 /* External addresses in inode */
58 #define NDADDR 12 /* Direct addresses in inode. */
59 #define NIADDR 3 /* Indirect addresses in inode. */
60
61 struct ufs1_dinode {
62 u_int16_t di_mode; /* 0: IFMT, permissions; see below. */
63 int16_t di_nlink; /* 2: File link count. */
64 union {
65 u_int16_t oldids[2]; /* 4: Ffs: old user and group ids. */
66 u_int32_t inumber; /* 4: Lfs: inode number. */
67 } di_u;
68 u_int64_t di_size; /* 8: File byte count. */
69 int32_t di_atime; /* 16: Last access time. */
70 int32_t di_atimensec; /* 20: Last access time. */
71 int32_t di_mtime; /* 24: Last modified time. */
72 int32_t di_mtimensec; /* 28: Last modified time. */
73 int32_t di_ctime; /* 32: Last inode change time. */
74 int32_t di_ctimensec; /* 36: Last inode change time. */
75 int32_t di_db[NDADDR]; /* 40: Direct disk blocks. */
76 int32_t di_ib[NIADDR]; /* 88: Indirect disk blocks. */
77 u_int32_t di_flags; /* 100: Status flags (chflags). */
78 int32_t di_blocks; /* 104: Blocks actually held. */
79 int32_t di_gen; /* 108: Generation number. */
80 u_int32_t di_uid; /* 112: File owner. */
81 u_int32_t di_gid; /* 116: File group. */
82 int32_t di_spare[2]; /* 120: Reserved; currently unused */
83 };
84
85 struct ufs2_dinode {
86 u_int16_t di_mode; /* 0: IFMT, permissions; see below. */
87 int16_t di_nlink; /* 2: File link count. */
88 u_int32_t di_uid; /* 4: File owner. */
89 u_int32_t di_gid; /* 8: File group. */
90 u_int32_t di_blksize; /* 12: Inode blocksize. */
91 u_int64_t di_size; /* 16: File byte count. */
92 u_int64_t di_blocks; /* 24: Bytes actually held. */
93 int64_t di_atime; /* 32: Last access time. */
94 int64_t di_mtime; /* 40: Last modified time. */
95 int64_t di_ctime; /* 48: Last inode change time. */
96 int64_t di_birthtime; /* 56: Inode creation time. */
97 int32_t di_mtimensec; /* 64: Last modified time. */
98 int32_t di_atimensec; /* 68: Last access time. */
99 int32_t di_ctimensec; /* 72: Last inode change time. */
100 int32_t di_birthnsec; /* 76: Inode creation time. */
101 int32_t di_gen; /* 80: Generation number. */
102 u_int32_t di_kernflags; /* 84: Kernel flags. */
103 u_int32_t di_flags; /* 88: Status flags (chflags). */
104 int32_t di_extsize; /* 92: External attributes block. */
105 int64_t di_extb[NXADDR];/* 96: External attributes block. */
106 int64_t di_db[NDADDR]; /* 112: Direct disk blocks. */
107 int64_t di_ib[NIADDR]; /* 208: Indirect disk blocks. */
108 int64_t di_spare[3]; /* 232: Reserved; currently unused */
109 };
110
111 /*
112 * The di_db fields may be overlaid with other information for
113 * file types that do not have associated disk storage. Block
114 * and character devices overlay the first data block with their
115 * dev_t value. Short symbolic links place their path in the
116 * di_db area.
117 */
118 #define di_inumber di_u.inumber
119 #define di_ogid di_u.oldids[1]
120 #define di_ouid di_u.oldids[0]
121 #define di_rdev di_db[0]
122 #define di_shortlink di_db
123
124 #define MAXSYMLINKLEN_UFS1 ((NDADDR + NIADDR) * sizeof(int32_t))
125 #define MAXSYMLINKLEN_UFS2 ((NDADDR + NIADDR) * sizeof(int64_t))
126
127 #define MAXSYMLINKLEN(ip) \
128 ((ip)->i_ump->um_fstype == UM_UFS1) ? \
129 MAXSYMLINKLEN_UFS1 : MAXSYMLINKLEN_UFS2
130
131 /* File permissions. */
132 #define IEXEC 0000100 /* Executable. */
133 #define IWRITE 0000200 /* Writeable. */
134 #define IREAD 0000400 /* Readable. */
135 #define ISVTX 0001000 /* Sticky bit. */
136 #define ISGID 0002000 /* Set-gid. */
137 #define ISUID 0004000 /* Set-uid. */
138
139 /* File types. */
140 #define IFMT 0170000 /* Mask of file type. */
141 #define IFIFO 0010000 /* Named pipe (fifo). */
142 #define IFCHR 0020000 /* Character device. */
143 #define IFDIR 0040000 /* Directory file. */
144 #define IFBLK 0060000 /* Block device. */
145 #define IFREG 0100000 /* Regular file. */
146 #define IFLNK 0120000 /* Symbolic link. */
147 #define IFSOCK 0140000 /* UNIX domain socket. */
148 #define IFWHT 0160000 /* Whiteout. */
149
150 #endif /* _UFS_DINODE_H_ */