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Annotation of Net2/ufs/dinode.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1982, 1989 The Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms, with or without
        !             6:  * modification, are permitted provided that the following conditions
        !             7:  * are met:
        !             8:  * 1. Redistributions of source code must retain the above copyright
        !             9:  *    notice, this list of conditions and the following disclaimer.
        !            10:  * 2. Redistributions in binary form must reproduce the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer in the
        !            12:  *    documentation and/or other materials provided with the distribution.
        !            13:  * 3. All advertising materials mentioning features or use of this software
        !            14:  *    must display the following acknowledgement:
        !            15:  *     This product includes software developed by the University of
        !            16:  *     California, Berkeley and its contributors.
        !            17:  * 4. Neither the name of the University nor the names of its contributors
        !            18:  *    may be used to endorse or promote products derived from this software
        !            19:  *    without specific prior written permission.
        !            20:  *
        !            21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            31:  * SUCH DAMAGE.
        !            32:  *
        !            33:  *     @(#)dinode.h    7.10 (Berkeley) 5/8/91
        !            34:  */
        !            35: 
        !            36: /*
        !            37:  * A dinode contains all the meta-data associated with a UFS file.
        !            38:  * This structure defines the on-disk format of a dinode.
        !            39:  */
        !            40: 
        !            41: #define        NDADDR  12              /* direct addresses in inode */
        !            42: #define        NIADDR  3               /* indirect addresses in inode */
        !            43: 
        !            44: struct dinode {
        !            45:        u_short di_mode;        /*  0: mode and type of file */
        !            46:        short   di_nlink;       /*  2: number of links to file */
        !            47:        uid_t   di_uid;         /*  4: owner's user id */
        !            48:        gid_t   di_gid;         /*  6: owner's group id */
        !            49:        u_quad  di_qsize;       /*  8: number of bytes in file */
        !            50:        time_t  di_atime;       /* 16: time last accessed */
        !            51:        long    di_atspare;
        !            52:        time_t  di_mtime;       /* 24: time last modified */
        !            53:        long    di_mtspare;
        !            54:        time_t  di_ctime;       /* 32: last time inode changed */
        !            55:        long    di_ctspare;
        !            56:        daddr_t di_db[NDADDR];  /* 40: disk block addresses */
        !            57:        daddr_t di_ib[NIADDR];  /* 88: indirect blocks */
        !            58:        long    di_flags;       /* 100: status, currently unused */
        !            59:        long    di_blocks;      /* 104: blocks actually held */
        !            60:        long    di_gen;         /* 108: generation number */
        !            61:        long    di_spare[4];    /* 112: reserved, currently unused */
        !            62: };
        !            63: 
        !            64: #if BYTE_ORDER == LITTLE_ENDIAN || defined(tahoe) /* ugh! -- must be fixed */
        !            65: #define        di_size         di_qsize.val[0]
        !            66: #else /* BYTE_ORDER == BIG_ENDIAN */
        !            67: #define        di_size         di_qsize.val[1]
        !            68: #endif
        !            69: #define        di_rdev         di_db[0]
        !            70: 
        !            71: /* file modes */
        !            72: #define        IFMT            0170000         /* mask of file type */
        !            73: #define        IFIFO           0010000         /* named pipe (fifo) */
        !            74: #define        IFCHR           0020000         /* character special device */
        !            75: #define        IFDIR           0040000         /* directory */
        !            76: #define        IFBLK           0060000         /* block special device */
        !            77: #define        IFREG           0100000         /* regular file */
        !            78: #define        IFLNK           0120000         /* symbolic link */
        !            79: #define        IFSOCK          0140000         /* UNIX domain socket */
        !            80: 
        !            81: #define        ISUID           04000           /* set user identifier when exec'ing */
        !            82: #define        ISGID           02000           /* set group identifier when exec'ing */
        !            83: #define        ISVTX           01000           /* save execution information on exit */
        !            84: #define        IREAD           0400            /* read permission */
        !            85: #define        IWRITE          0200            /* write permission */
        !            86: #define        IEXEC           0100            /* execute permission */

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