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dinode.h
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1 /* $NetBSD: dinode.h,v 1.18 2003/08/07 16:34:42 agc Exp $ */
2 
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  * Copyright (c) 1982, 1989, 1993
14  * The Regents of the University of California. All rights reserved.
15  * (c) UNIX System Laboratories, Inc.
16  * All or some portions of this file are derived from material licensed
17  * to the University of California by American Telephone and Telegraph
18  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
19  * the permission of UNIX System Laboratories, Inc.
20  *
21  * Redistribution and use in source and binary forms, with or without
22  * modification, are permitted provided that the following conditions
23  * are met:
24  * 1. Redistributions of source code must retain the above copyright
25  * notice, this list of conditions and the following disclaimer.
26  * 2. Redistributions in binary form must reproduce the above copyright
27  * notice, this list of conditions and the following disclaimer in the
28  * documentation and/or other materials provided with the distribution.
29  * 3. Neither the name of the University nor the names of its contributors
30  * may be used to endorse or promote products derived from this software
31  * without specific prior written permission.
32  *
33  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
34  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
35  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
36  * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
37  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
38  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
39  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
40  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
41  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
42  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
43  * SUCH DAMAGE.
44  *
45  * @(#)dinode.h 8.9 (Berkeley) 3/29/95
46  */
47 
48 #ifndef _UFS_UFS_DINODE_H_
49 #define _UFS_UFS_DINODE_H_
50 
51 #include "type.h"
52 
53 /*
54  * The root inode is the root of the file system. Inode 0 can't be used for
55  * normal purposes and historically bad blocks were linked to inode 1, thus
56  * the root inode is 2. (Inode 1 is no longer used for this purpose, however
57  * numerous dump tapes make this assumption, so we are stuck with it).
58  */
59 #define ROOTINO ((ino_t)2)
60 
61 /*
62  * The Whiteout inode# is a dummy non-zero inode number which will
63  * never be allocated to a real file. It is used as a place holder
64  * in the directory entry which has been tagged as a DT_W entry.
65  * See the comments about ROOTINO above.
66  */
67 #define WINO ((ino_t)1)
68 
69 /*
70  * A dinode contains all the meta-data associated with a UFS file.
71  * This structure defines the on-disk format of a dinode. Since
72  * this structure describes an on-disk structure, all its fields
73  * are defined by types with precise widths.
74  */
75 
76 #define NXADDR 2
77 #define NDADDR 12 /* Direct addresses in inode. */
78 #define NIADDR 3 /* Indirect addresses in inode. */
79 
80 struct ufs1_dinode {
81  u_int16_t di_mode; /* 0: IFMT, permissions; see below. */
82  int16_t di_nlink; /* 2: File link count. */
83  union {
84  u_int16_t oldids[2]; /* 4: Ffs: old user and group ids. */
85  u_int32_t inumber; /* 4: Lfs: inode number. */
86  } di_u;
87  u_int64_t di_size; /* 8: File byte count. */
88  int32_t di_atime; /* 16: Last access time. */
89  int32_t di_atimensec; /* 20: Last access time. */
90  int32_t di_mtime; /* 24: Last modified time. */
91  int32_t di_mtimensec; /* 28: Last modified time. */
92  int32_t di_ctime; /* 32: Last inode change time. */
93  int32_t di_ctimensec; /* 36: Last inode change time. */
94  int32_t di_db[NDADDR]; /* 40: Direct disk blocks. */
95  int32_t di_ib[NIADDR]; /* 88: Indirect disk blocks. */
96  u_int32_t di_flags; /* 100: Status flags (chflags). */
97  u_int32_t di_blocks; /* 104: Blocks actually held. */
98  int32_t di_gen; /* 108: Generation number. */
99  u_int32_t di_uid; /* 112: File owner. */
100  u_int32_t di_gid; /* 116: File group. */
101  int32_t di_spare[2]; /* 120: Reserved; currently unused */
102 };
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  int64_t di_atime; /* 32: Last access time. */
113  int64_t di_mtime; /* 40: Last modified time. */
114  int64_t di_ctime; /* 48: Last inode change time. */
115  int64_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  int64_t di_extb[NXADDR];/* 96: External attributes block. */
125  int64_t di_db[NDADDR]; /* 112: Direct disk blocks. */
126  int64_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_inumber di_u.inumber
138 #define di_ogid di_u.oldids[1]
139 #define di_ouid di_u.oldids[0]
140 #define di_rdev di_db[0]
141 #define MAXSYMLINKLEN_UFS1 ((NDADDR + NIADDR) * sizeof(int32_t))
142 #define MAXSYMLINKLEN_UFS2 ((NDADDR + NIADDR) * sizeof(int64_t))
143 
144 #define MAXSYMLINKLEN(ip) \
145  ((ip)->i_ump->um_fstype == UFS1) ? \
146  MAXSYMLINKLEN_UFS1 : MAXSYMLINKLEN_UFS2
147 
148 /* NeXT used to keep short symlinks in the inode even when using
149  * FS_42INODEFMT. In that case fs->fs_maxsymlinklen is probably -1,
150  * but short symlinks were stored in inodes shorter than this:
151  */
152 #define APPLEUFS_MAXSYMLINKLEN 60
153 
154 /* File permissions. */
155 #define IEXEC 0000100 /* Executable. */
156 #define IWRITE 0000200 /* Writable. */
157 #define IREAD 0000400 /* Readable. */
158 #define ISVTX 0001000 /* Sticky bit. */
159 #define ISGID 0002000 /* Set-gid. */
160 #define ISUID 0004000 /* Set-uid. */
161 
162 /* File types. */
163 #define IFMT 0170000 /* Mask of file type. */
164 #define IFIFO 0010000 /* Named pipe (fifo). */
165 #define IFCHR 0020000 /* Character device. */
166 #define IFDIR 0040000 /* Directory file. */
167 #define IFBLK 0060000 /* Block device. */
168 #define IFREG 0100000 /* Regular file. */
169 #define IFLNK 0120000 /* Symbolic link. */
170 #define IFSOCK 0140000 /* UNIX domain socket. */
171 #define IFWHT 0160000 /* Whiteout. */
172 
173 /* Size of the on-disk inode. */
174 #define DINODE1_SIZE (sizeof(struct ufs1_dinode)) /* 128 */
175 #define DINODE2_SIZE (sizeof(struct ufs2_dinode))
176 
177 #endif /* !_UFS_UFS_DINODE_H_ */
#define NDADDR
Definition: dinode.h:77
int32_t di_mtime
Definition: dinode.h:90
int32_t di_gen
Definition: dinode.h:98
u_int16_t di_mode
Definition: dinode.h:81
#define NIADDR
Definition: dinode.h:78
u_int32_t di_blksize
Definition: dinode.h:109
u_int32_t di_gid
Definition: dinode.h:100
u_int32_t di_uid
Definition: dinode.h:99
int32_t di_mtimensec
Definition: dinode.h:91
int32_t di_atime
Definition: dinode.h:88
u_int32_t di_flags
Definition: dinode.h:96
int16_t di_nlink
Definition: dinode.h:82
u_int32_t di_kernflags
Definition: dinode.h:121
int64_t di_birthtime
Definition: dinode.h:115
int32_t di_mtimensec
Definition: dinode.h:116
#define NXADDR
Definition: dinode.h:76
u_int32_t di_uid
Definition: dinode.h:107
int64_t di_spare[3]
Definition: dinode.h:127
int32_t di_spare[2]
Definition: dinode.h:101
int16_t di_nlink
Definition: dinode.h:106
int32_t di_ib[NIADDR]
Definition: dinode.h:95
int64_t di_ib[NIADDR]
Definition: dinode.h:126
UINT64 u_int64_t
Definition: types.h:76
int32_t di_extsize
Definition: dinode.h:123
u_int64_t di_size
Definition: dinode.h:110
int32_t di_atimensec
Definition: dinode.h:89
int32_t di_ctimensec
Definition: dinode.h:93
int32_t di_atimensec
Definition: dinode.h:117
int64_t di_mtime
Definition: dinode.h:113
int64_t di_extb[NXADDR]
Definition: dinode.h:124
unsigned short u_int16_t
Definition: rosdhcp.h:34
unsigned int u_int32_t
Definition: rosdhcp.h:35
u_int32_t inumber
Definition: dinode.h:85
int32_t di_ctimensec
Definition: dinode.h:118
INT32 int32_t
Definition: types.h:71
u_int32_t di_gid
Definition: dinode.h:108
int32_t di_ctime
Definition: dinode.h:92
u_int64_t di_blocks
Definition: dinode.h:111
int64_t di_ctime
Definition: dinode.h:114
int64_t di_db[NDADDR]
Definition: dinode.h:125
u_int16_t di_mode
Definition: dinode.h:105
int64_t di_atime
Definition: dinode.h:112
INT16 int16_t
Definition: types.h:70
u_int16_t oldids[2]
Definition: dinode.h:84
INT64 int64_t
Definition: types.h:72
u_int64_t di_size
Definition: dinode.h:87
u_int32_t di_flags
Definition: dinode.h:122
int32_t di_birthnsec
Definition: dinode.h:119
union ufs1_dinode::@725 di_u
int32_t di_db[NDADDR]
Definition: dinode.h:94
u_int32_t di_blocks
Definition: dinode.h:97
int32_t di_gen
Definition: dinode.h:120