usr/src/sys/ufs/ufs/dinode.h

/*
 * Copyright (c) 1982, 1989 The Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 *
 *      @(#)dinode.h    7.13 (Berkeley) %G%
 */

/*
 * The root inode is the root of the file system.  Inode 0 can't be used for
 * normal purposes and historically bad blocks were linked to inode 1, thus
 * the root inode is 2.  (Inode 1 is no longer used for this purpose, however
 * numerous dump tapes make this assumption, so we are stuck with it).
 */
#define ROOTINO ((ino_t)2)

/*
 * A dinode contains all the meta-data associated with a UFS file.
 * This structure defines the on-disk format of a dinode.
 */

#define NDADDR  12              /* direct addresses in inode */
#define NIADDR  3               /* indirect addresses in inode */

struct dinode {
        u_short di_mode;        /*  0: mode and type of file */
        short   di_nlink;       /*  2: number of links to file */
        uid_t   di_uid;         /*  4: owner's user id */
        gid_t   di_gid;         /*  6: owner's group id */
        u_quad_t di_qsize;      /*  8: number of bytes in file */
        time_t  di_atime;       /* 16: time last accessed */
        long    di_atspare;
        time_t  di_mtime;       /* 24: time last modified */
        long    di_mtspare;
        time_t  di_ctime;       /* 32: last time inode changed */
        long    di_ctspare;
        daddr_t di_db[NDADDR];  /* 40: disk block addresses */
        daddr_t di_ib[NIADDR];  /* 88: indirect blocks */
        long    di_flags;       /* 100: status, currently unused */
        long    di_blocks;      /* 104: blocks actually held */
        long    di_gen;         /* 108: generation number */
        long    di_spare[4];    /* 112: reserved, currently unused */
};

#ifdef _NOQUAD
#define di_size di_qsize.val[_QUAD_LOWWORD]
#else
#define di_size di_qsize
#endif

#if defined(tahoe) /* ugh! -- must be fixed */
#undef di_size
#define di_size         di_qsize.val[0]
#endif

#define di_rdev         di_db[0]

/* file modes */
#define IFMT            0170000         /* mask of file type */
#define IFIFO           0010000         /* named pipe (fifo) */
#define IFCHR           0020000         /* character special device */
#define IFDIR           0040000         /* directory */
#define IFBLK           0060000         /* block special device */
#define IFREG           0100000         /* regular file */
#define IFLNK           0120000         /* symbolic link */
#define IFSOCK          0140000         /* UNIX domain socket */

#define ISUID           04000           /* set user identifier when exec'ing */
#define ISGID           02000           /* set group identifier when exec'ing */
#define ISVTX           01000           /* save execution information on exit */
#define IREAD           0400            /* read permission */
#define IWRITE          0200            /* write permission */
#define IEXEC           0100            /* execute permission */