1 /* $NetBSD: dinode.h,v 1.7 1995/06/15 23:22:48 cgd 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 8.6 (Berkeley) 9/13/94 41 */ 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 66 typedef int32_t ufs_daddr_t; 67 #define NDADDR 12 /* Direct addresses in inode. */ 68 #define NIADDR 3 /* Indirect addresses in inode. */ 69 70 struct dinode { 71 u_int16_t di_mode; /* 0: IFMT, permissions; see below. */ 72 int16_t di_nlink; /* 2: File link count. */ 73 union { 74 u_int16_t oldids[2]; /* 4: Ffs: old user and group ids. */ 75 ino_t inumber; /* 4: Lfs: inode number. */ 76 } di_u; 77 u_int64_t di_size; /* 8: File byte count. */ 78 int32_t di_atime; /* 16: Last access time. */ 79 int32_t di_atimensec; /* 20: Last access time. */ 80 int32_t di_mtime; /* 24: Last modified time. */ 81 int32_t di_mtimensec; /* 28: Last modified time. */ 82 int32_t di_ctime; /* 32: Last inode change time. */ 83 int32_t di_ctimensec; /* 36: Last inode change time. */ 84 ufs_daddr_t di_db[NDADDR]; /* 40: Direct disk blocks. */ 85 ufs_daddr_t di_ib[NIADDR]; /* 88: Indirect disk blocks. */ 86 u_int32_t di_flags; /* 100: Status flags (chflags). */ 87 int32_t di_blocks; /* 104: Blocks actually held. */ 88 int32_t di_gen; /* 108: Generation number. */ 89 u_int32_t di_uid; /* 112: File owner. */ 90 u_int32_t di_gid; /* 116: File group. */ 91 int32_t di_spare[2]; /* 120: Reserved; currently unused */ 92 }; 93 94 /* 95 * The di_db fields may be overlaid with other information for 96 * file types that do not have associated disk storage. Block 97 * and character devices overlay the first data block with their 98 * dev_t value. Short symbolic links place their path in the 99 * di_db area. 100 */ 101 #define di_inumber di_u.inumber 102 #define di_ogid di_u.oldids[1] 103 #define di_ouid di_u.oldids[0] 104 #define di_rdev di_db[0] 105 #define di_shortlink di_db 106 #define MAXSYMLINKLEN ((NDADDR + NIADDR) * sizeof(ufs_daddr_t)) 107 108 /* File permissions. */ 109 #define IEXEC 0000100 /* Executable. */ 110 #define IWRITE 0000200 /* Writeable. */ 111 #define IREAD 0000400 /* Readable. */ 112 #define ISVTX 0001000 /* Sticky bit. */ 113 #define ISGID 0002000 /* Set-gid. */ 114 #define ISUID 0004000 /* Set-uid. */ 115 116 /* File types. */ 117 #define IFMT 0170000 /* Mask of file type. */ 118 #define IFIFO 0010000 /* Named pipe (fifo). */ 119 #define IFCHR 0020000 /* Character device. */ 120 #define IFDIR 0040000 /* Directory file. */ 121 #define IFBLK 0060000 /* Block device. */ 122 #define IFREG 0100000 /* Regular file. */ 123 #define IFLNK 0120000 /* Symbolic link. */ 124 #define IFSOCK 0140000 /* UNIX domain socket. */ 125 #define IFWHT 0160000 /* Whiteout. */ 126