dinode.h revision 1541
11541Srgrimes/* 21541Srgrimes * Copyright (c) 1982, 1989, 1993 31541Srgrimes * The Regents of the University of California. All rights reserved. 41541Srgrimes * (c) UNIX System Laboratories, Inc. 51541Srgrimes * All or some portions of this file are derived from material licensed 61541Srgrimes * to the University of California by American Telephone and Telegraph 71541Srgrimes * Co. or Unix System Laboratories, Inc. and are reproduced herein with 81541Srgrimes * the permission of UNIX System Laboratories, Inc. 91541Srgrimes * 101541Srgrimes * Redistribution and use in source and binary forms, with or without 111541Srgrimes * modification, are permitted provided that the following conditions 121541Srgrimes * are met: 131541Srgrimes * 1. Redistributions of source code must retain the above copyright 141541Srgrimes * notice, this list of conditions and the following disclaimer. 151541Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 161541Srgrimes * notice, this list of conditions and the following disclaimer in the 171541Srgrimes * documentation and/or other materials provided with the distribution. 181541Srgrimes * 3. All advertising materials mentioning features or use of this software 191541Srgrimes * must display the following acknowledgement: 201541Srgrimes * This product includes software developed by the University of 211541Srgrimes * California, Berkeley and its contributors. 221541Srgrimes * 4. Neither the name of the University nor the names of its contributors 231541Srgrimes * may be used to endorse or promote products derived from this software 241541Srgrimes * without specific prior written permission. 251541Srgrimes * 261541Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 271541Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 281541Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 291541Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 301541Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 311541Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 321541Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 331541Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 341541Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 351541Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 361541Srgrimes * SUCH DAMAGE. 371541Srgrimes * 381541Srgrimes * @(#)dinode.h 8.3 (Berkeley) 1/21/94 391541Srgrimes */ 401541Srgrimes 411541Srgrimes/* 421541Srgrimes * The root inode is the root of the file system. Inode 0 can't be used for 431541Srgrimes * normal purposes and historically bad blocks were linked to inode 1, thus 441541Srgrimes * the root inode is 2. (Inode 1 is no longer used for this purpose, however 451541Srgrimes * numerous dump tapes make this assumption, so we are stuck with it). 461541Srgrimes */ 471541Srgrimes#define ROOTINO ((ino_t)2) 481541Srgrimes 491541Srgrimes/* 501541Srgrimes * A dinode contains all the meta-data associated with a UFS file. 511541Srgrimes * This structure defines the on-disk format of a dinode. 521541Srgrimes */ 531541Srgrimes 541541Srgrimes#define NDADDR 12 /* Direct addresses in inode. */ 551541Srgrimes#define NIADDR 3 /* Indirect addresses in inode. */ 561541Srgrimes 571541Srgrimesstruct dinode { 581541Srgrimes u_short di_mode; /* 0: IFMT and permissions. */ 591541Srgrimes short di_nlink; /* 2: File link count. */ 601541Srgrimes union { 611541Srgrimes u_short oldids[2]; /* 4: Ffs: old user and group ids. */ 621541Srgrimes ino_t inumber; /* 4: Lfs: inode number. */ 631541Srgrimes } di_u; 641541Srgrimes u_quad_t di_size; /* 8: File byte count. */ 651541Srgrimes struct timespec di_atime; /* 16: Last access time. */ 661541Srgrimes struct timespec di_mtime; /* 24: Last modified time. */ 671541Srgrimes struct timespec di_ctime; /* 32: Last inode change time. */ 681541Srgrimes daddr_t di_db[NDADDR]; /* 40: Direct disk blocks. */ 691541Srgrimes daddr_t di_ib[NIADDR]; /* 88: Indirect disk blocks. */ 701541Srgrimes u_long di_flags; /* 100: Status flags (chflags). */ 711541Srgrimes long di_blocks; /* 104: Blocks actually held. */ 721541Srgrimes long di_gen; /* 108: Generation number. */ 731541Srgrimes u_long di_uid; /* 112: File owner. */ 741541Srgrimes u_long di_gid; /* 116: File group. */ 751541Srgrimes long di_spare[2]; /* 120: Reserved; currently unused */ 761541Srgrimes}; 771541Srgrimes 781541Srgrimes/* 791541Srgrimes * The di_db fields may be overlaid with other information for 801541Srgrimes * file types that do not have associated disk storage. Block 811541Srgrimes * and character devices overlay the first data block with their 821541Srgrimes * dev_t value. Short symbolic links place their path in the 831541Srgrimes * di_db area. 841541Srgrimes */ 851541Srgrimes#define di_inumber di_u.inumber 861541Srgrimes#define di_ogid di_u.oldids[1] 871541Srgrimes#define di_ouid di_u.oldids[0] 881541Srgrimes#define di_rdev di_db[0] 891541Srgrimes#define di_shortlink di_db 901541Srgrimes#define MAXSYMLINKLEN ((NDADDR + NIADDR) * sizeof(daddr_t)) 911541Srgrimes 921541Srgrimes/* File modes. */ 931541Srgrimes#define IEXEC 0000100 /* Executable. */ 941541Srgrimes#define IWRITE 0000200 /* Writeable. */ 951541Srgrimes#define IREAD 0000400 /* Readable. */ 961541Srgrimes#define ISVTX 0001000 /* Sticky bit. */ 971541Srgrimes#define ISGID 0002000 /* Set-gid. */ 981541Srgrimes#define ISUID 0004000 /* Set-uid. */ 991541Srgrimes 1001541Srgrimes/* File types. */ 1011541Srgrimes#define IFMT 0170000 /* Mask of file type. */ 1021541Srgrimes#define IFIFO 0010000 /* Named pipe (fifo). */ 1031541Srgrimes#define IFCHR 0020000 /* Character device. */ 1041541Srgrimes#define IFDIR 0040000 /* Directory file. */ 1051541Srgrimes#define IFBLK 0060000 /* Block device. */ 1061541Srgrimes#define IFREG 0100000 /* Regular file. */ 1071541Srgrimes#define IFLNK 0120000 /* Symbolic link. */ 1081541Srgrimes#define IFSOCK 0140000 /* UNIX domain socket. */ 109