dinode.h revision 1.7
1/* $OpenBSD: dinode.h,v 1.7 2003/06/02 23:28:23 millert 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 * The Whiteout inode# is a dummy non-zero inode number which will 53 * never be allocated to a real file. It is used as a place holder 54 * in the directory entry which has been tagged as a DT_W entry. 55 * See the comments about ROOTINO above. 56 */ 57#define WINO ((ino_t)1) 58 59/* 60 * A dinode contains all the meta-data associated with a UFS file. 61 * This structure defines the on-disk format of a dinode. Since 62 * this structure describes an on-disk structure, all its fields 63 * are defined by types with precise widths. 64 */ 65 66typedef int32_t ufs_daddr_t; 67typedef int32_t ufs1_daddr_t; 68#define NDADDR 12 /* Direct addresses in inode. */ 69#define NIADDR 3 /* Indirect addresses in inode. */ 70 71struct dinode { 72 u_int16_t di_mode; /* 0: IFMT, permissions; see below. */ 73 int16_t di_nlink; /* 2: File link count. */ 74 union { 75 u_int16_t oldids[2]; /* 4: Ffs: old user and group ids. */ 76 u_int32_t inumber; /* 4: Lfs: inode number. */ 77 } di_u; 78 u_int64_t di_size; /* 8: File byte count. */ 79 int32_t di_atime; /* 16: Last access time. */ 80 int32_t di_atimensec; /* 20: Last access time. */ 81 int32_t di_mtime; /* 24: Last modified time. */ 82 int32_t di_mtimensec; /* 28: Last modified time. */ 83 int32_t di_ctime; /* 32: Last inode change time. */ 84 int32_t di_ctimensec; /* 36: Last inode change time. */ 85 ufs1_daddr_t di_db[NDADDR]; /* 40: Direct disk blocks. */ 86 ufs1_daddr_t di_ib[NIADDR]; /* 88: Indirect disk blocks. */ 87 u_int32_t di_flags; /* 100: Status flags (chflags). */ 88 int32_t di_blocks; /* 104: Blocks actually held. */ 89 int32_t di_gen; /* 108: Generation number. */ 90 u_int32_t di_uid; /* 112: File owner. */ 91 u_int32_t di_gid; /* 116: File group. */ 92 int32_t di_spare[2]; /* 120: Reserved; currently unused */ 93}; 94 95/* 96 * The di_db fields may be overlaid with other information for 97 * file types that do not have associated disk storage. Block 98 * and character devices overlay the first data block with their 99 * dev_t value. Short symbolic links place their path in the 100 * di_db area. 101 */ 102#define di_inumber di_u.inumber 103#define di_ogid di_u.oldids[1] 104#define di_ouid di_u.oldids[0] 105#define di_rdev di_db[0] 106#define di_shortlink di_db 107#define MAXSYMLINKLEN ((NDADDR + NIADDR) * sizeof(ufs1_daddr_t)) 108 109/* File permissions. */ 110#define IEXEC 0000100 /* Executable. */ 111#define IWRITE 0000200 /* Writeable. */ 112#define IREAD 0000400 /* Readable. */ 113#define ISVTX 0001000 /* Sticky bit. */ 114#define ISGID 0002000 /* Set-gid. */ 115#define ISUID 0004000 /* Set-uid. */ 116 117/* File types. */ 118#define IFMT 0170000 /* Mask of file type. */ 119#define IFIFO 0010000 /* Named pipe (fifo). */ 120#define IFCHR 0020000 /* Character device. */ 121#define IFDIR 0040000 /* Directory file. */ 122#define IFBLK 0060000 /* Block device. */ 123#define IFREG 0100000 /* Regular file. */ 124#define IFLNK 0120000 /* Symbolic link. */ 125#define IFSOCK 0140000 /* UNIX domain socket. */ 126#define IFWHT 0160000 /* Whiteout. */ 127 128#endif /* _UFS_DINODE_H_ */ 129