Annotation of sys/ufs/ufs/dinode.h, Revision 1.1.1.1
1.1 nbrk 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_ */
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