dinode.h (5590B)
1 /* $Id: //depot/blt/srv/vfs/drivers/ffs/dinode.h#2 $ */ 2 /* OpenBSD: dinode.h,v 1.3 1997/02/24 14:27:16 niklas Exp */ 3 /* NetBSD: dinode.h,v 1.7 1995/06/15 23:22:48 cgd Exp */ 4 5 /* 6 * Copyright (c) 1982, 1989, 1993 7 * The Regents of the University of California. All rights reserved. 8 * (c) UNIX System Laboratories, Inc. 9 * All or some portions of this file are derived from material licensed 10 * to the University of California by American Telephone and Telegraph 11 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 12 * the permission of UNIX System Laboratories, Inc. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 3. All advertising materials mentioning features or use of this software 23 * must display the following acknowledgement: 24 * This product includes software developed by the University of 25 * California, Berkeley and its contributors. 26 * 4. Neither the name of the University nor the names of its contributors 27 * may be used to endorse or promote products derived from this software 28 * without specific prior written permission. 29 * 30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 40 * SUCH DAMAGE. 41 * 42 * @(#)dinode.h 8.6 (Berkeley) 9/13/94 43 */ 44 45 #ifndef DINODE_H 46 #define DINODE_H 47 48 /* 49 * The root inode is the root of the file system. Inode 0 can't be used for 50 * normal purposes and historically bad blocks were linked to inode 1, thus 51 * the root inode is 2. (Inode 1 is no longer used for this purpose, however 52 * numerous dump tapes make this assumption, so we are stuck with it). 53 */ 54 #define ROOTINO ((ino_t)2) 55 56 /* 57 * The Whiteout inode# is a dummy non-zero inode number which will 58 * never be allocated to a real file. It is used as a place holder 59 * in the directory entry which has been tagged as a DT_W entry. 60 * See the comments about ROOTINO above. 61 */ 62 #define WINO ((ino_t)1) 63 64 /* 65 * A dinode contains all the meta-data associated with a UFS file. 66 * This structure defines the on-disk format of a dinode. Since 67 * this structure describes an on-disk structure, all its fields 68 * are defined by types with precise widths. 69 */ 70 71 #define NDADDR 12 /* Direct addresses in inode. */ 72 #define NIADDR 3 /* Indirect addresses in inode. */ 73 74 struct ffs_dinode { 75 uint16 di_mode; /* 0: IFMT, permissions; see below. */ 76 int16 di_nlink; /* 2: File link count. */ 77 union { 78 uint16 oldids[2]; /* 4: Ffs: old user and group ids. */ 79 ino_t inumber; /* 4: Lfs: inode number. */ 80 } di_u; 81 uint64 di_size; /* 8: File byte count. */ 82 int32 di_atime; /* 16: Last access time. */ 83 int32 di_atimensec; /* 20: Last access time. */ 84 int32 di_mtime; /* 24: Last modified time. */ 85 int32 di_mtimensec; /* 28: Last modified time. */ 86 int32 di_ctime; /* 32: Last inode change time. */ 87 int32 di_ctimensec; /* 36: Last inode change time. */ 88 int32 di_db[NDADDR]; /* 40: Direct disk blocks. */ 89 int32 di_ib[NIADDR]; /* 88: Indirect disk blocks. */ 90 uint32 di_flags; /* 100: Status flags (chflags). */ 91 int32 di_blocks; /* 104: Blocks actually held. */ 92 int32 di_gen; /* 108: Generation number. */ 93 uint32 di_uid; /* 112: File owner. */ 94 uint32 di_gid; /* 116: File group. */ 95 int32 di_spare[2]; /* 120: Reserved; currently unused */ 96 }; 97 98 /* 99 * The di_db fields may be overlaid with other information for 100 * file types that do not have associated disk storage. Block 101 * and character devices overlay the first data block with their 102 * dev_t value. Short symbolic links place their path in the 103 * di_db area. 104 */ 105 #define di_inumber di_u.inumber 106 #define di_ogid di_u.oldids[1] 107 #define di_ouid di_u.oldids[0] 108 #define di_rdev di_db[0] 109 #define di_shortlink di_db 110 #define MAXSYMLINKLEN ((NDADDR + NIADDR) * sizeof(uint32)) 111 112 /* File permissions. */ 113 #define IEXEC 0000100 /* Executable. */ 114 #define IWRITE 0000200 /* Writeable. */ 115 #define IREAD 0000400 /* Readable. */ 116 #define ISVTX 0001000 /* Sticky bit. */ 117 #define ISGID 0002000 /* Set-gid. */ 118 #define ISUID 0004000 /* Set-uid. */ 119 120 /* File types. */ 121 #define IFMT 0170000 /* Mask of file type. */ 122 #define IFIFO 0010000 /* Named pipe (fifo). */ 123 #define IFCHR 0020000 /* Character device. */ 124 #define IFDIR 0040000 /* Directory file. */ 125 #define IFBLK 0060000 /* Block device. */ 126 #define IFREG 0100000 /* Regular file. */ 127 #define IFLNK 0120000 /* Symbolic link. */ 128 #define IFSOCK 0140000 /* UNIX domain socket. */ 129 #define IFWHT 0160000 /* Whiteout. */ 130 131 #endif 132