Annotation of src/sys/ufs/ufs/dinode.h, Revision 1.19
1.19 ! christos 1: /* $NetBSD: dinode.h,v 1.17.2.3 2004/09/21 13:39:22 skrll Exp $ */
1.6 mycroft 2:
1.1 mycroft 3: /*
1.17 fvdl 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: *
1.1 mycroft 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.
1.18 agc 29: * 3. Neither the name of the University nor the names of its contributors
1.1 mycroft 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: *
1.8 fvdl 45: * @(#)dinode.h 8.9 (Berkeley) 3/29/95
1.1 mycroft 46: */
47:
1.13 lukem 48: #ifndef _UFS_UFS_DINODE_H_
49: #define _UFS_UFS_DINODE_H_
50:
1.1 mycroft 51: /*
52: * The root inode is the root of the file system. Inode 0 can't be used for
53: * normal purposes and historically bad blocks were linked to inode 1, thus
54: * the root inode is 2. (Inode 1 is no longer used for this purpose, however
55: * numerous dump tapes make this assumption, so we are stuck with it).
56: */
57: #define ROOTINO ((ino_t)2)
58:
59: /*
1.5 mycroft 60: * The Whiteout inode# is a dummy non-zero inode number which will
61: * never be allocated to a real file. It is used as a place holder
62: * in the directory entry which has been tagged as a DT_W entry.
63: * See the comments about ROOTINO above.
64: */
65: #define WINO ((ino_t)1)
66:
67: /*
1.1 mycroft 68: * A dinode contains all the meta-data associated with a UFS file.
1.7 cgd 69: * This structure defines the on-disk format of a dinode. Since
70: * this structure describes an on-disk structure, all its fields
71: * are defined by types with precise widths.
1.1 mycroft 72: */
73:
1.17 fvdl 74: #define NXADDR 2
1.1 mycroft 75: #define NDADDR 12 /* Direct addresses in inode. */
76: #define NIADDR 3 /* Indirect addresses in inode. */
77:
1.17 fvdl 78: struct ufs1_dinode {
1.5 mycroft 79: u_int16_t di_mode; /* 0: IFMT, permissions; see below. */
1.4 cgd 80: int16_t di_nlink; /* 2: File link count. */
1.1 mycroft 81: union {
1.4 cgd 82: u_int16_t oldids[2]; /* 4: Ffs: old user and group ids. */
1.8 fvdl 83: u_int32_t inumber; /* 4: Lfs: inode number. */
1.1 mycroft 84: } di_u;
1.4 cgd 85: u_int64_t di_size; /* 8: File byte count. */
1.7 cgd 86: int32_t di_atime; /* 16: Last access time. */
87: int32_t di_atimensec; /* 20: Last access time. */
88: int32_t di_mtime; /* 24: Last modified time. */
89: int32_t di_mtimensec; /* 28: Last modified time. */
90: int32_t di_ctime; /* 32: Last inode change time. */
91: int32_t di_ctimensec; /* 36: Last inode change time. */
1.16 fvdl 92: int32_t di_db[NDADDR]; /* 40: Direct disk blocks. */
93: int32_t di_ib[NIADDR]; /* 88: Indirect disk blocks. */
1.4 cgd 94: u_int32_t di_flags; /* 100: Status flags (chflags). */
1.8 fvdl 95: u_int32_t di_blocks; /* 104: Blocks actually held. */
1.4 cgd 96: int32_t di_gen; /* 108: Generation number. */
97: u_int32_t di_uid; /* 112: File owner. */
98: u_int32_t di_gid; /* 116: File group. */
99: int32_t di_spare[2]; /* 120: Reserved; currently unused */
1.1 mycroft 100: };
101:
1.17 fvdl 102: struct ufs2_dinode {
103: u_int16_t di_mode; /* 0: IFMT, permissions; see below. */
104: int16_t di_nlink; /* 2: File link count. */
105: u_int32_t di_uid; /* 4: File owner. */
106: u_int32_t di_gid; /* 8: File group. */
107: u_int32_t di_blksize; /* 12: Inode blocksize. */
108: u_int64_t di_size; /* 16: File byte count. */
109: u_int64_t di_blocks; /* 24: Bytes actually held. */
110: int64_t di_atime; /* 32: Last access time. */
111: int64_t di_mtime; /* 40: Last modified time. */
112: int64_t di_ctime; /* 48: Last inode change time. */
113: int64_t di_birthtime; /* 56: Inode creation time. */
114: int32_t di_mtimensec; /* 64: Last modified time. */
115: int32_t di_atimensec; /* 68: Last access time. */
116: int32_t di_ctimensec; /* 72: Last inode change time. */
117: int32_t di_birthnsec; /* 76: Inode creation time. */
118: int32_t di_gen; /* 80: Generation number. */
119: u_int32_t di_kernflags; /* 84: Kernel flags. */
120: u_int32_t di_flags; /* 88: Status flags (chflags). */
121: int32_t di_extsize; /* 92: External attributes block. */
122: int64_t di_extb[NXADDR];/* 96: External attributes block. */
123: int64_t di_db[NDADDR]; /* 112: Direct disk blocks. */
124: int64_t di_ib[NIADDR]; /* 208: Indirect disk blocks. */
125: int64_t di_spare[3]; /* 232: Reserved; currently unused */
126: };
127:
1.1 mycroft 128: /*
129: * The di_db fields may be overlaid with other information for
130: * file types that do not have associated disk storage. Block
131: * and character devices overlay the first data block with their
132: * dev_t value. Short symbolic links place their path in the
133: * di_db area.
134: */
135: #define di_inumber di_u.inumber
136: #define di_ogid di_u.oldids[1]
137: #define di_ouid di_u.oldids[0]
138: #define di_rdev di_db[0]
1.17 fvdl 139: #define MAXSYMLINKLEN_UFS1 ((NDADDR + NIADDR) * sizeof(int32_t))
140: #define MAXSYMLINKLEN_UFS2 ((NDADDR + NIADDR) * sizeof(int64_t))
141:
142: #define MAXSYMLINKLEN(ip) \
143: ((ip)->i_ump->um_fstype == UFS1) ? \
144: MAXSYMLINKLEN_UFS1 : MAXSYMLINKLEN_UFS2
1.14 dbj 145:
146: /* NeXT used to keep short symlinks in the inode even when using
147: * FS_42INODEFMT. In that case fs->fs_maxsymlinklen is probably -1,
148: * but short symlinks were stored in inodes shorter than this:
149: */
150: #define APPLEUFS_MAXSYMLINKLEN 60
1.1 mycroft 151:
1.5 mycroft 152: /* File permissions. */
1.1 mycroft 153: #define IEXEC 0000100 /* Executable. */
1.15 wiz 154: #define IWRITE 0000200 /* Writable. */
1.1 mycroft 155: #define IREAD 0000400 /* Readable. */
156: #define ISVTX 0001000 /* Sticky bit. */
157: #define ISGID 0002000 /* Set-gid. */
158: #define ISUID 0004000 /* Set-uid. */
159:
160: /* File types. */
161: #define IFMT 0170000 /* Mask of file type. */
162: #define IFIFO 0010000 /* Named pipe (fifo). */
163: #define IFCHR 0020000 /* Character device. */
164: #define IFDIR 0040000 /* Directory file. */
165: #define IFBLK 0060000 /* Block device. */
166: #define IFREG 0100000 /* Regular file. */
167: #define IFLNK 0120000 /* Symbolic link. */
168: #define IFSOCK 0140000 /* UNIX domain socket. */
1.5 mycroft 169: #define IFWHT 0160000 /* Whiteout. */
1.9 thorpej 170:
171: /* Size of the on-disk inode. */
1.17 fvdl 172: #define DINODE1_SIZE (sizeof(struct ufs1_dinode)) /* 128 */
173: #define DINODE2_SIZE (sizeof(struct ufs2_dinode))
1.13 lukem 174:
175: #endif /* !_UFS_UFS_DINODE_H_ */
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