1 /* $NetBSD: dinode.h,v 1.21 2009/06/28 09:26:18 ad Exp $ */ 2 3 /* 4 * Copyright (c) 2002 Networks Associates Technology, Inc. 5 * All rights reserved. 6 * 7 * This software was developed for the FreeBSD Project by Marshall 8 * Kirk McKusick and Network Associates Laboratories, the Security 9 * Research Division of Network Associates, Inc. under DARPA/SPAWAR 10 * contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS 11 * research program 12 * 13 * Copyright (c) 1982, 1989, 1993 14 * The Regents of the University of California. All rights reserved. 15 * (c) UNIX System Laboratories, Inc. 16 * All or some portions of this file are derived from material licensed 17 * to the University of California by American Telephone and Telegraph 18 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 19 * the permission of UNIX System Laboratories, Inc. 20 * 21 * Redistribution and use in source and binary forms, with or without 22 * modification, are permitted provided that the following conditions 23 * are met: 24 * 1. Redistributions of source code must retain the above copyright 25 * notice, this list of conditions and the following disclaimer. 26 * 2. Redistributions in binary form must reproduce the above copyright 27 * notice, this list of conditions and the following disclaimer in the 28 * documentation and/or other materials provided with the distribution. 29 * 3. Neither the name of the University nor the names of its contributors 30 * may be used to endorse or promote products derived from this software 31 * without specific prior written permission. 32 * 33 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 34 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 35 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 36 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 37 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 38 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 39 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 40 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 41 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 42 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 43 * SUCH DAMAGE. 44 * 45 * @(#)dinode.h 8.9 (Berkeley) 3/29/95 46 */ 47 48 /* 49 * NOTE: COORDINATE ON-DISK FORMAT CHANGES WITH THE FREEBSD PROJECT. 50 */ 51 52 #ifndef _UFS_UFS_DINODE_H_ 53 #define _UFS_UFS_DINODE_H_ 54 55 /* 56 * The root inode is the root of the file system. Inode 0 can't be used for 57 * normal purposes and historically bad blocks were linked to inode 1, thus 58 * the root inode is 2. (Inode 1 is no longer used for this purpose, however 59 * numerous dump tapes make this assumption, so we are stuck with it). 60 */ 61 #define ROOTINO ((ino_t)2) 62 63 /* 64 * The Whiteout inode# is a dummy non-zero inode number which will 65 * never be allocated to a real file. It is used as a place holder 66 * in the directory entry which has been tagged as a DT_W entry. 67 * See the comments about ROOTINO above. 68 */ 69 #define WINO ((ino_t)1) 70 71 /* 72 * A dinode contains all the meta-data associated with a UFS file. 73 * This structure defines the on-disk format of a dinode. Since 74 * this structure describes an on-disk structure, all its fields 75 * are defined by types with precise widths. 76 */ 77 78 #define NXADDR 2 79 #define NDADDR 12 /* Direct addresses in inode. */ 80 #define NIADDR 3 /* Indirect addresses in inode. */ 81 82 struct ufs1_dinode { 83 u_int16_t di_mode; /* 0: IFMT, permissions; see below. */ 84 int16_t di_nlink; /* 2: File link count. */ 85 union { 86 u_int16_t oldids[2]; /* 4: Ffs: old user and group ids. */ 87 u_int32_t inumber; /* 4: Lfs: inode number. */ 88 } di_u; 89 u_int64_t di_size; /* 8: File byte count. */ 90 int32_t di_atime; /* 16: Last access time. */ 91 int32_t di_atimensec; /* 20: Last access time. */ 92 int32_t di_mtime; /* 24: Last modified time. */ 93 int32_t di_mtimensec; /* 28: Last modified time. */ 94 int32_t di_ctime; /* 32: Last inode change time. */ 95 int32_t di_ctimensec; /* 36: Last inode change time. */ 96 int32_t di_db[NDADDR]; /* 40: Direct disk blocks. */ 97 int32_t di_ib[NIADDR]; /* 88: Indirect disk blocks. */ 98 u_int32_t di_flags; /* 100: Status flags (chflags). */ 99 u_int32_t di_blocks; /* 104: Blocks actually held. */ 100 int32_t di_gen; /* 108: Generation number. */ 101 u_int32_t di_uid; /* 112: File owner. */ 102 u_int32_t di_gid; /* 116: File group. */ 103 u_int64_t di_modrev; /* 120: i_modrev for NFSv4 */ 104 }; 105 106 struct ufs2_dinode { 107 u_int16_t di_mode; /* 0: IFMT, permissions; see below. */ 108 int16_t di_nlink; /* 2: File link count. */ 109 u_int32_t di_uid; /* 4: File owner. */ 110 u_int32_t di_gid; /* 8: File group. */ 111 u_int32_t di_blksize; /* 12: Inode blocksize. */ 112 u_int64_t di_size; /* 16: File byte count. */ 113 u_int64_t di_blocks; /* 24: Bytes actually held. */ 114 int64_t di_atime; /* 32: Last access time. */ 115 int64_t di_mtime; /* 40: Last modified time. */ 116 int64_t di_ctime; /* 48: Last inode change time. */ 117 int64_t di_birthtime; /* 56: Inode creation time. */ 118 int32_t di_mtimensec; /* 64: Last modified time. */ 119 int32_t di_atimensec; /* 68: Last access time. */ 120 int32_t di_ctimensec; /* 72: Last inode change time. */ 121 int32_t di_birthnsec; /* 76: Inode creation time. */ 122 int32_t di_gen; /* 80: Generation number. */ 123 u_int32_t di_kernflags; /* 84: Kernel flags. */ 124 u_int32_t di_flags; /* 88: Status flags (chflags). */ 125 int32_t di_extsize; /* 92: External attributes block. */ 126 int64_t di_extb[NXADDR];/* 96: External attributes block. */ 127 int64_t di_db[NDADDR]; /* 112: Direct disk blocks. */ 128 int64_t di_ib[NIADDR]; /* 208: Indirect disk blocks. */ 129 u_int64_t di_modrev; /* 232: i_modrev for NFSv4 */ 130 int64_t di_spare[2]; /* 240: Reserved; currently unused */ 131 }; 132 133 /* 134 * The di_db fields may be overlaid with other information for 135 * file types that do not have associated disk storage. Block 136 * and character devices overlay the first data block with their 137 * dev_t value. Short symbolic links place their path in the 138 * di_db area. 139 */ 140 #define di_inumber di_u.inumber 141 #define di_ogid di_u.oldids[1] 142 #define di_ouid di_u.oldids[0] 143 #define di_rdev di_db[0] 144 #define MAXSYMLINKLEN_UFS1 ((NDADDR + NIADDR) * sizeof(int32_t)) 145 #define MAXSYMLINKLEN_UFS2 ((NDADDR + NIADDR) * sizeof(int64_t)) 146 147 #define MAXSYMLINKLEN(ip) \ 148 ((ip)->i_ump->um_fstype == UFS1) ? \ 149 MAXSYMLINKLEN_UFS1 : MAXSYMLINKLEN_UFS2 150 151 /* NeXT used to keep short symlinks in the inode even when using 152 * FS_42INODEFMT. In that case fs->fs_maxsymlinklen is probably -1, 153 * but short symlinks were stored in inodes shorter than this: 154 */ 155 #define APPLEUFS_MAXSYMLINKLEN 60 156 157 /* File permissions. */ 158 #define IEXEC 0000100 /* Executable. */ 159 #define IWRITE 0000200 /* Writable. */ 160 #define IREAD 0000400 /* Readable. */ 161 #define ISVTX 0001000 /* Sticky bit. */ 162 #define ISGID 0002000 /* Set-gid. */ 163 #define ISUID 0004000 /* Set-uid. */ 164 165 /* File types. */ 166 #define IFMT 0170000 /* Mask of file type. */ 167 #define IFIFO 0010000 /* Named pipe (fifo). */ 168 #define IFCHR 0020000 /* Character device. */ 169 #define IFDIR 0040000 /* Directory file. */ 170 #define IFBLK 0060000 /* Block device. */ 171 #define IFREG 0100000 /* Regular file. */ 172 #define IFLNK 0120000 /* Symbolic link. */ 173 #define IFSOCK 0140000 /* UNIX domain socket. */ 174 #define IFWHT 0160000 /* Whiteout. */ 175 176 /* Size of the on-disk inode. */ 177 #define DINODE1_SIZE (sizeof(struct ufs1_dinode)) /* 128 */ 178 #define DINODE2_SIZE (sizeof(struct ufs2_dinode)) 179 180 #endif /* !_UFS_UFS_DINODE_H_ */ 181