123419Smckusick /* 263376Sbostic * Copyright (c) 1982, 1989, 1993 363376Sbostic * The Regents of the University of California. All rights reserved. 4*65774Sbostic * (c) UNIX System Laboratories, Inc. 5*65774Sbostic * All or some portions of this file are derived from material licensed 6*65774Sbostic * to the University of California by American Telephone and Telegraph 7*65774Sbostic * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8*65774Sbostic * the permission of UNIX System Laboratories, Inc. 923419Smckusick * 1044536Sbostic * %sccs.include.redist.c% 1137714Smckusick * 12*65774Sbostic * @(#)dinode.h 8.3 (Berkeley) 01/21/94 1323419Smckusick */ 1458Sbill 1558Sbill /* 1651616Sbostic * The root inode is the root of the file system. Inode 0 can't be used for 1751616Sbostic * normal purposes and historically bad blocks were linked to inode 1, thus 1851616Sbostic * the root inode is 2. (Inode 1 is no longer used for this purpose, however 1951616Sbostic * numerous dump tapes make this assumption, so we are stuck with it). 2051616Sbostic */ 2151616Sbostic #define ROOTINO ((ino_t)2) 2251616Sbostic 2351616Sbostic /* 2449449Smckusick * A dinode contains all the meta-data associated with a UFS file. 2549449Smckusick * This structure defines the on-disk format of a dinode. 2658Sbill */ 2758Sbill 2864513Sbostic #define NDADDR 12 /* Direct addresses in inode. */ 2964513Sbostic #define NIADDR 3 /* Indirect addresses in inode. */ 306565Smckusic 316565Smckusic struct dinode { 3264513Sbostic u_short di_mode; /* 0: IFMT and permissions. */ 3364513Sbostic short di_nlink; /* 2: File link count. */ 3454373Smckusick union { 3564513Sbostic u_short oldids[2]; /* 4: Ffs: old user and group ids. */ 3664513Sbostic ino_t inumber; /* 4: Lfs: inode number. */ 3754373Smckusick } di_u; 3864513Sbostic u_quad_t di_size; /* 8: File byte count. */ 3964513Sbostic struct timespec di_atime; /* 16: Last access time. */ 4064513Sbostic struct timespec di_mtime; /* 24: Last modified time. */ 4164513Sbostic struct timespec di_ctime; /* 32: Last inode change time. */ 4264513Sbostic daddr_t di_db[NDADDR]; /* 40: Direct disk blocks. */ 4364513Sbostic daddr_t di_ib[NIADDR]; /* 88: Indirect disk blocks. */ 4464513Sbostic u_long di_flags; /* 100: Status flags (chflags). */ 4564513Sbostic long di_blocks; /* 104: Blocks actually held. */ 4664513Sbostic long di_gen; /* 108: Generation number. */ 4764513Sbostic u_long di_uid; /* 112: File owner. */ 4864513Sbostic u_long di_gid; /* 116: File group. */ 4964513Sbostic long di_spare[2]; /* 120: Reserved; currently unused */ 506565Smckusic }; 516565Smckusic 5254301Smckusick /* 5354301Smckusick * The di_db fields may be overlaid with other information for 5454301Smckusick * file types that do not have associated disk storage. Block 5554301Smckusick * and character devices overlay the first data block with their 5654301Smckusick * dev_t value. Short symbolic links place their path in the 5754301Smckusick * di_db area. 5854301Smckusick */ 5964513Sbostic #define di_inumber di_u.inumber 6064513Sbostic #define di_ogid di_u.oldids[1] 6154373Smckusick #define di_ouid di_u.oldids[0] 6239386Smckusick #define di_rdev di_db[0] 6364513Sbostic #define di_shortlink di_db 6456668Smckusick #define MAXSYMLINKLEN ((NDADDR + NIADDR) * sizeof(daddr_t)) 656565Smckusic 6664513Sbostic /* File modes. */ 6764513Sbostic #define IEXEC 0000100 /* Executable. */ 6864513Sbostic #define IWRITE 0000200 /* Writeable. */ 6964513Sbostic #define IREAD 0000400 /* Readable. */ 7064513Sbostic #define ISVTX 0001000 /* Sticky bit. */ 7164513Sbostic #define ISGID 0002000 /* Set-gid. */ 7264513Sbostic #define ISUID 0004000 /* Set-uid. */ 738990Sroot 7464513Sbostic /* File types. */ 7564513Sbostic #define IFMT 0170000 /* Mask of file type. */ 7664513Sbostic #define IFIFO 0010000 /* Named pipe (fifo). */ 7764513Sbostic #define IFCHR 0020000 /* Character device. */ 7864513Sbostic #define IFDIR 0040000 /* Directory file. */ 7964513Sbostic #define IFBLK 0060000 /* Block device. */ 8064513Sbostic #define IFREG 0100000 /* Regular file. */ 8164513Sbostic #define IFLNK 0120000 /* Symbolic link. */ 8264513Sbostic #define IFSOCK 0140000 /* UNIX domain socket. */ 83