kernel: Move GPL'd kernel files to sys/gnu to have them all in one place.
[dragonfly.git] / sys / gnu / vfs / ext2fs / dinode.h
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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 1.7 1999/08/28 00:52:27 peter Exp $
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40 */
41
42#ifndef _VFS_GNU_EXT2FS_DINODE_H_
43#define _VFS_GNU_EXT2FS_DINODE_H_
44
45typedef __uint32_t ext2_ino_t;
46
47/*
48 * The root inode is the root of the filesystem. Inode 0 can't be used for
49 * normal purposes and historically bad blocks were linked to inode 1, thus
50 * the root inode is 2. (Inode 1 is no longer used for this purpose, however
51 * numerous dump tapes make this assumption, so we are stuck with it).
52 */
53#define ROOTINO ((ino_t)2)
54
55/*
56 * The Whiteout inode# is a dummy non-zero inode number which will
57 * never be allocated to a real file. It is used as a place holder
58 * in the directory entry which has been tagged as a DT_W entry.
59 * See the comments about ROOTINO above.
60 */
61#define WINO ((ino_t)1)
62
63/*
64 * A dinode contains all the meta-data associated with a EXT2 file.
65 * This structure defines the on-disk format of a dinode. Since
66 * this structure describes an on-disk structure, all its fields
67 * are defined by types with precise widths.
68 */
69
70typedef __int32_t ext2_daddr_t;
71
72#define NDADDR 12 /* Direct addresses in inode. */
73#define NIADDR 3 /* Indirect addresses in inode. */
74
75struct ext2_dinode {
76 uint16_t di_mode; /* 0: IFMT, permissions; see below. */
77 int16_t di_nlink; /* 2: File link count. */
78 union {
79 uint16_t oldids[2]; /* 4: Ffs: old user and group ids. */
80 int32_t inumber; /* 4: Lfs: inode number. */
81 } di_u;
82 uint64_t di_size; /* 8: File byte count. */
83 int32_t di_atime; /* 16: Last access time. */
84 int32_t di_atimensec; /* 20: Last access time. */
85 int32_t di_mtime; /* 24: Last modified time. */
86 int32_t di_mtimensec; /* 28: Last modified time. */
87 int32_t di_ctime; /* 32: Last inode change time. */
88 int32_t di_ctimensec; /* 36: Last inode change time. */
89 ext2_daddr_t di_db[NDADDR]; /* 40: Direct disk blocks. */
90 ext2_daddr_t di_ib[NIADDR]; /* 88: Indirect disk blocks. */
91 uint32_t di_flags; /* 100: Status flags (chflags). */
92 int32_t di_blocks; /* 104: Blocks actually held. */
93 int32_t di_gen; /* 108: Generation number. */
94 uint32_t di_uid; /* 112: File owner. */
95 uint32_t di_gid; /* 116: File group. */
93f50d60 96 int32_t di_spare[2]; /* 120: used by ext2fs */
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97};
98
99/*
100 * The di_db fields may be overlaid with other information for
101 * file types that do not have associated disk storage. Block
102 * and character devices overlay the first data block with their
b13267a5 103 * cdev_t value. Short symbolic links place their path in the
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104 * di_db area.
105 */
106#define di_inumber di_u.inumber
107#define di_ogid di_u.oldids[1]
108#define di_ouid di_u.oldids[0]
109#define di_rdev di_db[0]
110#define di_shortlink di_db
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111#define MAXSYMLINKLEN ((NDADDR + NIADDR) * sizeof(ext2_daddr_t))
112
113/* File permissions. */
114#define IEXEC 0000100 /* Executable. */
115#define IWRITE 0000200 /* Writeable. */
116#define IREAD 0000400 /* Readable. */
117#define ISVTX 0001000 /* Sticky bit. */
118#define ISGID 0002000 /* Set-gid. */
119#define ISUID 0004000 /* Set-uid. */
120
121/* File types. */
122#define IFMT 0170000 /* Mask of file type. */
123#define IFIFO 0010000 /* Named pipe (fifo). */
124#define IFCHR 0020000 /* Character device. */
125#define IFDIR 0040000 /* Directory file. */
126#define IFBLK 0060000 /* Block device. */
127#define IFREG 0100000 /* Regular file. */
128#define IFLNK 0120000 /* Symbolic link. */
129#define IFSOCK 0140000 /* UNIX domain socket. */
130#define IFWHT 0160000 /* Whiteout. */
131
132#endif /* !_VFS_GNU_EXT2FS_DINODE_H_ */