1449c849fSmckusick /* 276403e9cSbostic * Copyright (c) 1982, 1989, 1993 376403e9cSbostic * The Regents of the University of California. All rights reserved. 4*a257ce37Sbostic * (c) UNIX System Laboratories, Inc. 5*a257ce37Sbostic * All or some portions of this file are derived from material licensed 6*a257ce37Sbostic * to the University of California by American Telephone and Telegraph 7*a257ce37Sbostic * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8*a257ce37Sbostic * the permission of UNIX System Laboratories, Inc. 9449c849fSmckusick * 1088f5dc9aSbostic * %sccs.include.redist.c% 118177e537Smckusick * 12*a257ce37Sbostic * @(#)dinode.h 8.3 (Berkeley) 01/21/94 13449c849fSmckusick */ 14876480d6Sbill 15876480d6Sbill /* 16bdbadaa0Sbostic * The root inode is the root of the file system. Inode 0 can't be used for 17bdbadaa0Sbostic * normal purposes and historically bad blocks were linked to inode 1, thus 18bdbadaa0Sbostic * the root inode is 2. (Inode 1 is no longer used for this purpose, however 19bdbadaa0Sbostic * numerous dump tapes make this assumption, so we are stuck with it). 20bdbadaa0Sbostic */ 21bdbadaa0Sbostic #define ROOTINO ((ino_t)2) 22bdbadaa0Sbostic 23bdbadaa0Sbostic /* 24f43f6c4aSmckusick * A dinode contains all the meta-data associated with a UFS file. 25f43f6c4aSmckusick * This structure defines the on-disk format of a dinode. 26876480d6Sbill */ 273f558a57Smckusic 282f347998Sbostic #define NDADDR 12 /* Direct addresses in inode. */ 292f347998Sbostic #define NIADDR 3 /* Indirect addresses in inode. */ 30876480d6Sbill 313f558a57Smckusic struct dinode { 322f347998Sbostic u_short di_mode; /* 0: IFMT and permissions. */ 332f347998Sbostic short di_nlink; /* 2: File link count. */ 34f6d1d0afSmckusick union { 352f347998Sbostic u_short oldids[2]; /* 4: Ffs: old user and group ids. */ 362f347998Sbostic ino_t inumber; /* 4: Lfs: inode number. */ 37f6d1d0afSmckusick } di_u; 382f347998Sbostic u_quad_t di_size; /* 8: File byte count. */ 392f347998Sbostic struct timespec di_atime; /* 16: Last access time. */ 402f347998Sbostic struct timespec di_mtime; /* 24: Last modified time. */ 412f347998Sbostic struct timespec di_ctime; /* 32: Last inode change time. */ 422f347998Sbostic daddr_t di_db[NDADDR]; /* 40: Direct disk blocks. */ 432f347998Sbostic daddr_t di_ib[NIADDR]; /* 88: Indirect disk blocks. */ 442f347998Sbostic u_long di_flags; /* 100: Status flags (chflags). */ 452f347998Sbostic long di_blocks; /* 104: Blocks actually held. */ 462f347998Sbostic long di_gen; /* 108: Generation number. */ 472f347998Sbostic u_long di_uid; /* 112: File owner. */ 482f347998Sbostic u_long di_gid; /* 116: File group. */ 492f347998Sbostic long di_spare[2]; /* 120: Reserved; currently unused */ 503f558a57Smckusic }; 513f558a57Smckusic 5212385100Smckusick /* 5312385100Smckusick * The di_db fields may be overlaid with other information for 5412385100Smckusick * file types that do not have associated disk storage. Block 5512385100Smckusick * and character devices overlay the first data block with their 5612385100Smckusick * dev_t value. Short symbolic links place their path in the 5712385100Smckusick * di_db area. 5812385100Smckusick */ 59f6d1d0afSmckusick #define di_inumber di_u.inumber 602f347998Sbostic #define di_ogid di_u.oldids[1] 612f347998Sbostic #define di_ouid di_u.oldids[0] 62ed5dc773Smckusick #define di_rdev di_db[0] 6312385100Smckusick #define di_shortlink di_db 6488ecb8a2Smckusick #define MAXSYMLINKLEN ((NDADDR + NIADDR) * sizeof(daddr_t)) 653f558a57Smckusic 662f347998Sbostic /* File modes. */ 672f347998Sbostic #define IEXEC 0000100 /* Executable. */ 682f347998Sbostic #define IWRITE 0000200 /* Writeable. */ 692f347998Sbostic #define IREAD 0000400 /* Readable. */ 702f347998Sbostic #define ISVTX 0001000 /* Sticky bit. */ 712f347998Sbostic #define ISGID 0002000 /* Set-gid. */ 722f347998Sbostic #define ISUID 0004000 /* Set-uid. */ 73e10ef072Sroot 742f347998Sbostic /* File types. */ 752f347998Sbostic #define IFMT 0170000 /* Mask of file type. */ 762f347998Sbostic #define IFIFO 0010000 /* Named pipe (fifo). */ 772f347998Sbostic #define IFCHR 0020000 /* Character device. */ 782f347998Sbostic #define IFDIR 0040000 /* Directory file. */ 792f347998Sbostic #define IFBLK 0060000 /* Block device. */ 802f347998Sbostic #define IFREG 0100000 /* Regular file. */ 812f347998Sbostic #define IFLNK 0120000 /* Symbolic link. */ 822f347998Sbostic #define IFSOCK 0140000 /* UNIX domain socket. */ 83