1 | /* $NetBSD: dinode.h,v 1.25 2016/01/22 23:06:10 dholland 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 | /* |
49 | * NOTE: COORDINATE ON-DISK FORMAT CHANGES WITH THE FREEBSD PROJECT. |
50 | */ |
51 | |
52 | #ifndef _UFS_UFS_DINODE_H_ |
53 | #define _UFS_UFS_DINODE_H_ |
54 | |
55 | /* |
56 | * The root inode is the root of the file system. Inode 0 can't be used for |
57 | * normal purposes and historically bad blocks were linked to inode 1, thus |
58 | * the root inode is 2. (Inode 1 is no longer used for this purpose, however |
59 | * numerous dump tapes make this assumption, so we are stuck with it). |
60 | */ |
61 | #define UFS_ROOTINO ((ino_t)2) |
62 | |
63 | /* |
64 | * The Whiteout inode# is a dummy non-zero inode number which will |
65 | * never be allocated to a real file. It is used as a place holder |
66 | * in the directory entry which has been tagged as a DT_W entry. |
67 | * See the comments about UFS_ROOTINO above. |
68 | */ |
69 | #define UFS_WINO ((ino_t)1) |
70 | |
71 | /* |
72 | * A dinode contains all the meta-data associated with a UFS file. |
73 | * This structure defines the on-disk format of a dinode. Since |
74 | * this structure describes an on-disk structure, all its fields |
75 | * are defined by types with precise widths. |
76 | */ |
77 | |
78 | #define UFS_NXADDR 2 |
79 | #define UFS_NDADDR 12 /* Direct addresses in inode. */ |
80 | #define UFS_NIADDR 3 /* Indirect addresses in inode. */ |
81 | |
82 | struct ufs1_dinode { |
83 | uint16_t di_mode; /* 0: IFMT, permissions; see below. */ |
84 | int16_t di_nlink; /* 2: File link count. */ |
85 | uint16_t di_oldids[2]; /* 4: Ffs: old user and group ids. */ |
86 | uint64_t di_size; /* 8: File byte count. */ |
87 | int32_t di_atime; /* 16: Last access time. */ |
88 | int32_t di_atimensec; /* 20: Last access time. */ |
89 | int32_t di_mtime; /* 24: Last modified time. */ |
90 | int32_t di_mtimensec; /* 28: Last modified time. */ |
91 | int32_t di_ctime; /* 32: Last inode change time. */ |
92 | int32_t di_ctimensec; /* 36: Last inode change time. */ |
93 | int32_t di_db[UFS_NDADDR]; /* 40: Direct disk blocks. */ |
94 | int32_t di_ib[UFS_NIADDR]; /* 88: Indirect disk blocks. */ |
95 | uint32_t di_flags; /* 100: Status flags (chflags). */ |
96 | uint32_t di_blocks; /* 104: Blocks actually held. */ |
97 | int32_t di_gen; /* 108: Generation number. */ |
98 | uint32_t di_uid; /* 112: File owner. */ |
99 | uint32_t di_gid; /* 116: File group. */ |
100 | uint64_t di_modrev; /* 120: i_modrev for NFSv4 */ |
101 | }; |
102 | |
103 | struct ufs2_dinode { |
104 | uint16_t di_mode; /* 0: IFMT, permissions; see below. */ |
105 | int16_t di_nlink; /* 2: File link count. */ |
106 | uint32_t di_uid; /* 4: File owner. */ |
107 | uint32_t di_gid; /* 8: File group. */ |
108 | uint32_t di_blksize; /* 12: Inode blocksize. */ |
109 | uint64_t di_size; /* 16: File byte count. */ |
110 | uint64_t di_blocks; /* 24: Bytes actually held. */ |
111 | int64_t di_atime; /* 32: Last access time. */ |
112 | int64_t di_mtime; /* 40: Last modified time. */ |
113 | int64_t di_ctime; /* 48: Last inode change time. */ |
114 | int64_t di_birthtime; /* 56: Inode creation time. */ |
115 | int32_t di_mtimensec; /* 64: Last modified time. */ |
116 | int32_t di_atimensec; /* 68: Last access time. */ |
117 | int32_t di_ctimensec; /* 72: Last inode change time. */ |
118 | int32_t di_birthnsec; /* 76: Inode creation time. */ |
119 | int32_t di_gen; /* 80: Generation number. */ |
120 | uint32_t di_kernflags; /* 84: Kernel flags. */ |
121 | uint32_t di_flags; /* 88: Status flags (chflags). */ |
122 | int32_t di_extsize; /* 92: External attributes block. */ |
123 | int64_t di_extb[UFS_NXADDR];/* 96: External attributes block. */ |
124 | int64_t di_db[UFS_NDADDR]; /* 112: Direct disk blocks. */ |
125 | int64_t di_ib[UFS_NIADDR]; /* 208: Indirect disk blocks. */ |
126 | uint64_t di_modrev; /* 232: i_modrev for NFSv4 */ |
127 | int64_t di_spare[2]; /* 240: 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_ogid di_oldids[1] |
138 | #define di_ouid di_oldids[0] |
139 | #define di_rdev di_db[0] |
140 | #define UFS1_MAXSYMLINKLEN ((UFS_NDADDR + UFS_NIADDR) * sizeof(int32_t)) |
141 | #define UFS2_MAXSYMLINKLEN ((UFS_NDADDR + UFS_NIADDR) * sizeof(int64_t)) |
142 | |
143 | #define UFS_MAXSYMLINKLEN(ip) \ |
144 | ((ip)->i_ump->um_fstype == UFS1) ? \ |
145 | UFS1_MAXSYMLINKLEN : UFS2_MAXSYMLINKLEN |
146 | |
147 | /* NeXT used to keep short symlinks in the inode even when using |
148 | * FS_42INODEFMT. In that case fs->fs_maxsymlinklen is probably -1, |
149 | * but short symlinks were stored in inodes shorter than this: |
150 | */ |
151 | #define APPLEUFS_MAXSYMLINKLEN 60 |
152 | |
153 | /* File permissions. */ |
154 | #define IEXEC 0000100 /* Executable. */ |
155 | #define IWRITE 0000200 /* Writable. */ |
156 | #define IREAD 0000400 /* Readable. */ |
157 | #define ISVTX 0001000 /* Sticky bit. */ |
158 | #define ISGID 0002000 /* Set-gid. */ |
159 | #define ISUID 0004000 /* Set-uid. */ |
160 | |
161 | /* File types. */ |
162 | #define IFMT 0170000 /* Mask of file type. */ |
163 | #define IFIFO 0010000 /* Named pipe (fifo). */ |
164 | #define IFCHR 0020000 /* Character device. */ |
165 | #define IFDIR 0040000 /* Directory file. */ |
166 | #define IFBLK 0060000 /* Block device. */ |
167 | #define IFREG 0100000 /* Regular file. */ |
168 | #define IFLNK 0120000 /* Symbolic link. */ |
169 | #define IFSOCK 0140000 /* UNIX domain socket. */ |
170 | #define IFWHT 0160000 /* Whiteout. */ |
171 | |
172 | /* Size of the on-disk inode. */ |
173 | #define DINODE1_SIZE (sizeof(struct ufs1_dinode)) /* 128 */ |
174 | #define DINODE2_SIZE (sizeof(struct ufs2_dinode)) |
175 | |
176 | #endif /* !_UFS_UFS_DINODE_H_ */ |
177 | |