1 /* $NetBSD: dinode.h,v 1.14 2002/09/28 20:11:09 dbj Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * (c) UNIX System Laboratories, Inc. 7 * All or some portions of this file are derived from material licensed 8 * to the University of California by American Telephone and Telegraph 9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 10 * the permission of UNIX System Laboratories, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * @(#)dinode.h 8.9 (Berkeley) 3/29/95 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 file system. 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 typedef long ufs_lbn_t; 71 72 #define NDADDR 12 /* Direct addresses in inode. */ 73 #define NIADDR 3 /* Indirect addresses in inode. */ 74 75 struct dinode { 76 u_int16_t di_mode; /* 0: IFMT, permissions; see below. */ 77 int16_t di_nlink; /* 2: File link count. */ 78 union { 79 u_int16_t oldids[2]; /* 4: Ffs: old user and group ids. */ 80 u_int32_t inumber; /* 4: Lfs: inode number. */ 81 } di_u; 82 u_int64_t di_size; /* 8: File byte count. */ 83 int32_t di_atime; /* 16: Last access time. */ 84 int32_t di_atimensec; /* 20: Last access time. */ 85 int32_t di_mtime; /* 24: Last modified time. */ 86 int32_t di_mtimensec; /* 28: Last modified time. */ 87 int32_t di_ctime; /* 32: Last inode change time. */ 88 int32_t di_ctimensec; /* 36: Last inode change time. */ 89 ufs_daddr_t di_db[NDADDR]; /* 40: Direct disk blocks. */ 90 ufs_daddr_t di_ib[NIADDR]; /* 88: Indirect disk blocks. */ 91 u_int32_t di_flags; /* 100: Status flags (chflags). */ 92 u_int32_t di_blocks; /* 104: Blocks actually held. */ 93 int32_t di_gen; /* 108: Generation number. */ 94 u_int32_t di_uid; /* 112: File owner. */ 95 u_int32_t di_gid; /* 116: File group. */ 96 int32_t di_spare[2]; /* 120: Reserved; currently unused */ 97 }; 98 99 /* 100 * The di_db fields may be overlaid with other information for 101 * file types that do not have associated disk storage. Block 102 * and character devices overlay the first data block with their 103 * dev_t value. Short symbolic links place their path in the 104 * di_db area. 105 */ 106 #define di_inumber di_u.inumber 107 #define di_ogid di_u.oldids[1] 108 #define di_ouid di_u.oldids[0] 109 #define di_rdev di_db[0] 110 #define di_shortlink di_db 111 #define MAXSYMLINKLEN ((NDADDR + NIADDR) * sizeof(ufs_daddr_t)) 112 113 /* NeXT used to keep short symlinks in the inode even when using 114 * FS_42INODEFMT. In that case fs->fs_maxsymlinklen is probably -1, 115 * but short symlinks were stored in inodes shorter than this: 116 */ 117 #define APPLEUFS_MAXSYMLINKLEN 60 118 119 /* File permissions. */ 120 #define IEXEC 0000100 /* Executable. */ 121 #define IWRITE 0000200 /* Writeable. */ 122 #define IREAD 0000400 /* Readable. */ 123 #define ISVTX 0001000 /* Sticky bit. */ 124 #define ISGID 0002000 /* Set-gid. */ 125 #define ISUID 0004000 /* Set-uid. */ 126 127 /* File types. */ 128 #define IFMT 0170000 /* Mask of file type. */ 129 #define IFIFO 0010000 /* Named pipe (fifo). */ 130 #define IFCHR 0020000 /* Character device. */ 131 #define IFDIR 0040000 /* Directory file. */ 132 #define IFBLK 0060000 /* Block device. */ 133 #define IFREG 0100000 /* Regular file. */ 134 #define IFLNK 0120000 /* Symbolic link. */ 135 #define IFSOCK 0140000 /* UNIX domain socket. */ 136 #define IFWHT 0160000 /* Whiteout. */ 137 138 /* Size of the on-disk inode. */ 139 #define DINODE_SIZE (sizeof(struct dinode)) /* 128 */ 140 141 #endif /* !_UFS_UFS_DINODE_H_ */ 142