FreeBSD/Linux Kernel Cross Reference
sys/ufs/ufs/dinode.h
1 /*
2 * Copyright (c) 1982, 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * @(#)dinode.h 8.3 (Berkeley) 1/21/94
39 * $FreeBSD: src/sys/ufs/ufs/dinode.h,v 1.3.12.1 1999/09/05 08:23:59 peter Exp $
40 */
41
42 #ifndef _UFS_UFS_DINODE_H_
43 #define _UFS_UFS_DINODE_H_
44
45 /*
46 * The root inode is the root of the file system. Inode 0 can't be used for
47 * normal purposes and historically bad blocks were linked to inode 1, thus
48 * the root inode is 2. (Inode 1 is no longer used for this purpose, however
49 * numerous dump tapes make this assumption, so we are stuck with it).
50 */
51 #define ROOTINO ((ino_t)2)
52
53 /*
54 * A dinode contains all the meta-data associated with a UFS file.
55 * This structure defines the on-disk format of a dinode.
56 */
57
58 #define NDADDR 12 /* Direct addresses in inode. */
59 #define NIADDR 3 /* Indirect addresses in inode. */
60
61 struct dinode {
62 u_short di_mode; /* 0: IFMT and permissions. */
63 short di_nlink; /* 2: File link count. */
64 union {
65 u_short oldids[2]; /* 4: Ffs: old user and group ids. */
66 ino_t inumber; /* 4: Lfs: inode number. */
67 } di_u;
68 u_quad_t di_size; /* 8: File byte count. */
69 struct timespec di_atime; /* 16: Last access time. */
70 struct timespec di_mtime; /* 24: Last modified time. */
71 struct timespec di_ctime; /* 32: Last inode change time. */
72 daddr_t di_db[NDADDR]; /* 40: Direct disk blocks. */
73 daddr_t di_ib[NIADDR]; /* 88: Indirect disk blocks. */
74 u_long di_flags; /* 100: Status flags (chflags). */
75 long di_blocks; /* 104: Blocks actually held. */
76 long di_gen; /* 108: Generation number. */
77 u_long di_uid; /* 112: File owner. */
78 u_long di_gid; /* 116: File group. */
79 long di_spare[2]; /* 120: Reserved; currently unused */
80 };
81
82 /*
83 * The di_db fields may be overlaid with other information for
84 * file types that do not have associated disk storage. Block
85 * and character devices overlay the first data block with their
86 * dev_t value. Short symbolic links place their path in the
87 * di_db area.
88 */
89 #define di_inumber di_u.inumber
90 #define di_ogid di_u.oldids[1]
91 #define di_ouid di_u.oldids[0]
92 #define di_rdev di_db[0]
93 #define di_shortlink di_db
94 #define MAXSYMLINKLEN ((NDADDR + NIADDR) * sizeof(daddr_t))
95
96 /* File modes. */
97 #define IEXEC 0000100 /* Executable. */
98 #define IWRITE 0000200 /* Writeable. */
99 #define IREAD 0000400 /* Readable. */
100 #define ISVTX 0001000 /* Sticky bit. */
101 #define ISGID 0002000 /* Set-gid. */
102 #define ISUID 0004000 /* Set-uid. */
103
104 /* File types. */
105 #define IFMT 0170000 /* Mask of file type. */
106 #define IFIFO 0010000 /* Named pipe (fifo). */
107 #define IFCHR 0020000 /* Character device. */
108 #define IFDIR 0040000 /* Directory file. */
109 #define IFBLK 0060000 /* Block device. */
110 #define IFREG 0100000 /* Regular file. */
111 #define IFLNK 0120000 /* Symbolic link. */
112 #define IFSOCK 0140000 /* UNIX domain socket. */
113
114 #endif
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