1 /*- 2 * Copyright (c) 1982, 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * (c) UNIX System Laboratories, Inc. 5 * All or some portions of this file are derived from material licensed 6 * to the University of California by American Telephone and Telegraph 7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 * the permission of UNIX System Laboratories, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)dinode.h 8.3 (Berkeley) 1/21/94 39 * $FreeBSD: src/sys/ufs/ufs/dinode.h,v 1.7 1999/08/28 00:52:27 peter Exp $ 40 * $DragonFly: src/sys/vfs/ufs/dinode.h,v 1.3 2004/07/18 19:43:48 drhodus Exp $ 41 */ 42 43 #ifndef _UFS_UFS_DINODE_H_ 44 #define _UFS_UFS_DINODE_H_ 45 46 /* 47 * The root inode is the root of the filesystem. Inode 0 can't be used for 48 * normal purposes and historically bad blocks were linked to inode 1, thus 49 * the root inode is 2. (Inode 1 is no longer used for this purpose, however 50 * numerous dump tapes make this assumption, so we are stuck with it). 51 */ 52 #define ROOTINO ((ino_t)2) 53 54 /* 55 * The Whiteout inode# is a dummy non-zero inode number which will 56 * never be allocated to a real file. It is used as a place holder 57 * in the directory entry which has been tagged as a DT_W entry. 58 * See the comments about ROOTINO above. 59 */ 60 #define WINO ((ino_t)1) 61 62 /* 63 * A dinode contains all the meta-data associated with a UFS file. 64 * This structure defines the on-disk format of a dinode. Since 65 * this structure describes an on-disk structure, all its fields 66 * are defined by types with precise widths. 67 */ 68 69 /* typedef int32_t ufs_daddr_t; */ 70 #define NDADDR 12 /* Direct addresses in inode. */ 71 #define NIADDR 3 /* Indirect addresses in inode. */ 72 73 struct dinode { 74 uint16_t di_mode; /* 0: IFMT, permissions; see below. */ 75 int16_t di_nlink; /* 2: File link count. */ 76 union { 77 uint16_t oldids[2]; /* 4: Ffs: old user and group ids. */ 78 int32_t inumber; /* 4: Lfs: inode number. */ 79 } di_u; 80 uint64_t di_size; /* 8: File byte count. */ 81 int32_t di_atime; /* 16: Last access time. */ 82 int32_t di_atimensec; /* 20: Last access time. */ 83 int32_t di_mtime; /* 24: Last modified time. */ 84 int32_t di_mtimensec; /* 28: Last modified time. */ 85 int32_t di_ctime; /* 32: Last inode change time. */ 86 int32_t di_ctimensec; /* 36: Last inode change time. */ 87 ufs_daddr_t di_db[NDADDR]; /* 40: Direct disk blocks. */ 88 ufs_daddr_t di_ib[NIADDR]; /* 88: Indirect disk blocks. */ 89 uint32_t di_flags; /* 100: Status flags (chflags). */ 90 int32_t di_blocks; /* 104: Blocks actually held. */ 91 int32_t di_gen; /* 108: Generation number. */ 92 uint32_t di_uid; /* 112: File owner. */ 93 uint32_t di_gid; /* 116: File group. */ 94 int32_t di_spare[2]; /* 120: Reserved; currently unused */ 95 }; 96 97 /* 98 * The di_db fields may be overlaid with other information for 99 * file types that do not have associated disk storage. Block 100 * and character devices overlay the first data block with their 101 * dev_t value. Short symbolic links place their path in the 102 * di_db area. 103 */ 104 #define di_inumber di_u.inumber 105 #define di_ogid di_u.oldids[1] 106 #define di_ouid di_u.oldids[0] 107 #define di_rdev di_db[0] 108 #define di_shortlink di_db 109 #define MAXSYMLINKLEN ((NDADDR + NIADDR) * sizeof(ufs_daddr_t)) 110 111 /* File permissions. */ 112 #define IEXEC 0000100 /* Executable. */ 113 #define IWRITE 0000200 /* Writeable. */ 114 #define IREAD 0000400 /* Readable. */ 115 #define ISVTX 0001000 /* Sticky bit. */ 116 #define ISGID 0002000 /* Set-gid. */ 117 #define ISUID 0004000 /* Set-uid. */ 118 119 /* File types. */ 120 #define IFMT 0170000 /* Mask of file type. */ 121 #define IFIFO 0010000 /* Named pipe (fifo). */ 122 #define IFCHR 0020000 /* Character device. */ 123 #define IFDIR 0040000 /* Directory file. */ 124 #define IFBLK 0060000 /* Block device. */ 125 #define IFREG 0100000 /* Regular file. */ 126 #define IFLNK 0120000 /* Symbolic link. */ 127 #define IFSOCK 0140000 /* UNIX domain socket. */ 128 #define IFWHT 0160000 /* Whiteout. */ 129 130 #endif /* !_UFS_UFS_DINODE_H_ */ 131