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Annotation of src/sys/ufs/ufs/dinode.h, Revision 1.24

1.24    ! dholland    1: /*     $NetBSD: dinode.h,v 1.23 2013/06/09 00:10:55 dholland Exp $     */
1.6       mycroft     2:
1.1       mycroft     3: /*
1.17      fvdl        4:  * Copyright (c) 2002 Networks Associates Technology, Inc.
                      5:  * All rights reserved.
                      6:  *
                      7:  * This software was developed for the FreeBSD Project by Marshall
                      8:  * Kirk McKusick and Network Associates Laboratories, the Security
                      9:  * Research Division of Network Associates, Inc. under DARPA/SPAWAR
                     10:  * contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS
                     11:  * research program
                     12:  *
1.1       mycroft    13:  * Copyright (c) 1982, 1989, 1993
                     14:  *     The Regents of the University of California.  All rights reserved.
                     15:  * (c) UNIX System Laboratories, Inc.
                     16:  * All or some portions of this file are derived from material licensed
                     17:  * to the University of California by American Telephone and Telegraph
                     18:  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
                     19:  * the permission of UNIX System Laboratories, Inc.
                     20:  *
                     21:  * Redistribution and use in source and binary forms, with or without
                     22:  * modification, are permitted provided that the following conditions
                     23:  * are met:
                     24:  * 1. Redistributions of source code must retain the above copyright
                     25:  *    notice, this list of conditions and the following disclaimer.
                     26:  * 2. Redistributions in binary form must reproduce the above copyright
                     27:  *    notice, this list of conditions and the following disclaimer in the
                     28:  *    documentation and/or other materials provided with the distribution.
1.18      agc        29:  * 3. Neither the name of the University nor the names of its contributors
1.1       mycroft    30:  *    may be used to endorse or promote products derived from this software
                     31:  *    without specific prior written permission.
                     32:  *
                     33:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     34:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     35:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     36:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     37:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     38:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     39:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     40:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     41:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     42:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     43:  * SUCH DAMAGE.
                     44:  *
1.8       fvdl       45:  *     @(#)dinode.h    8.9 (Berkeley) 3/29/95
1.1       mycroft    46:  */
                     47:
1.21      ad         48: /*
                     49:  * NOTE: COORDINATE ON-DISK FORMAT CHANGES WITH THE FREEBSD PROJECT.
                     50:  */
                     51:
1.13      lukem      52: #ifndef        _UFS_UFS_DINODE_H_
                     53: #define        _UFS_UFS_DINODE_H_
                     54:
1.1       mycroft    55: /*
                     56:  * The root inode is the root of the file system.  Inode 0 can't be used for
                     57:  * normal purposes and historically bad blocks were linked to inode 1, thus
                     58:  * the root inode is 2.  (Inode 1 is no longer used for this purpose, however
                     59:  * numerous dump tapes make this assumption, so we are stuck with it).
                     60:  */
1.22      dholland   61: #define        UFS_ROOTINO     ((ino_t)2)
1.1       mycroft    62:
                     63: /*
1.5       mycroft    64:  * The Whiteout inode# is a dummy non-zero inode number which will
                     65:  * never be allocated to a real file.  It is used as a place holder
                     66:  * in the directory entry which has been tagged as a DT_W entry.
1.22      dholland   67:  * See the comments about UFS_ROOTINO above.
1.5       mycroft    68:  */
1.22      dholland   69: #define        UFS_WINO        ((ino_t)1)
1.5       mycroft    70:
                     71: /*
1.1       mycroft    72:  * A dinode contains all the meta-data associated with a UFS file.
1.7       cgd        73:  * This structure defines the on-disk format of a dinode. Since
                     74:  * this structure describes an on-disk structure, all its fields
                     75:  * are defined by types with precise widths.
1.1       mycroft    76:  */
                     77:
1.22      dholland   78: #define UFS_NXADDR     2
                     79: #define        UFS_NDADDR      12              /* Direct addresses in inode. */
                     80: #define        UFS_NIADDR      3               /* Indirect addresses in inode. */
1.1       mycroft    81:
1.17      fvdl       82: struct ufs1_dinode {
1.5       mycroft    83:        u_int16_t       di_mode;        /*   0: IFMT, permissions; see below. */
1.4       cgd        84:        int16_t         di_nlink;       /*   2: File link count. */
1.24    ! dholland   85:        u_int16_t       di_oldids[2];   /*   4: Ffs: old user and group ids. */
1.4       cgd        86:        u_int64_t       di_size;        /*   8: File byte count. */
1.7       cgd        87:        int32_t         di_atime;       /*  16: Last access time. */
                     88:        int32_t         di_atimensec;   /*  20: Last access time. */
                     89:        int32_t         di_mtime;       /*  24: Last modified time. */
                     90:        int32_t         di_mtimensec;   /*  28: Last modified time. */
                     91:        int32_t         di_ctime;       /*  32: Last inode change time. */
                     92:        int32_t         di_ctimensec;   /*  36: Last inode change time. */
1.22      dholland   93:        int32_t         di_db[UFS_NDADDR]; /*  40: Direct disk blocks. */
                     94:        int32_t         di_ib[UFS_NIADDR]; /*  88: Indirect disk blocks. */
1.4       cgd        95:        u_int32_t       di_flags;       /* 100: Status flags (chflags). */
1.8       fvdl       96:        u_int32_t       di_blocks;      /* 104: Blocks actually held. */
1.4       cgd        97:        int32_t         di_gen;         /* 108: Generation number. */
                     98:        u_int32_t       di_uid;         /* 112: File owner. */
                     99:        u_int32_t       di_gid;         /* 116: File group. */
1.20      ad        100:        u_int64_t       di_modrev;      /* 120: i_modrev for NFSv4 */
1.1       mycroft   101: };
                    102:
1.17      fvdl      103: struct ufs2_dinode {
                    104:        u_int16_t       di_mode;        /*   0: IFMT, permissions; see below. */
                    105:        int16_t         di_nlink;       /*   2: File link count. */
                    106:        u_int32_t       di_uid;         /*   4: File owner. */
                    107:        u_int32_t       di_gid;         /*   8: File group. */
                    108:        u_int32_t       di_blksize;     /*  12: Inode blocksize. */
                    109:        u_int64_t       di_size;        /*  16: File byte count. */
                    110:        u_int64_t       di_blocks;      /*  24: Bytes actually held. */
                    111:        int64_t         di_atime;       /*  32: Last access time. */
                    112:        int64_t         di_mtime;       /*  40: Last modified time. */
                    113:        int64_t         di_ctime;       /*  48: Last inode change time. */
                    114:        int64_t         di_birthtime;   /*  56: Inode creation time. */
                    115:        int32_t         di_mtimensec;   /*  64: Last modified time. */
                    116:        int32_t         di_atimensec;   /*  68: Last access time. */
                    117:        int32_t         di_ctimensec;   /*  72: Last inode change time. */
                    118:        int32_t         di_birthnsec;   /*  76: Inode creation time. */
                    119:        int32_t         di_gen;         /*  80: Generation number. */
                    120:        u_int32_t       di_kernflags;   /*  84: Kernel flags. */
                    121:        u_int32_t       di_flags;       /*  88: Status flags (chflags). */
                    122:        int32_t         di_extsize;     /*  92: External attributes block. */
1.22      dholland  123:        int64_t         di_extb[UFS_NXADDR];/* 96: External attributes block. */
                    124:        int64_t         di_db[UFS_NDADDR]; /* 112: Direct disk blocks. */
                    125:        int64_t         di_ib[UFS_NIADDR]; /* 208: Indirect disk blocks. */
1.20      ad        126:        u_int64_t       di_modrev;      /* 232: i_modrev for NFSv4 */
                    127:        int64_t         di_spare[2];    /* 240: Reserved; currently unused */
1.17      fvdl      128: };
                    129:
1.1       mycroft   130: /*
                    131:  * The di_db fields may be overlaid with other information for
                    132:  * file types that do not have associated disk storage. Block
                    133:  * and character devices overlay the first data block with their
                    134:  * dev_t value. Short symbolic links place their path in the
                    135:  * di_db area.
                    136:  */
1.24    ! dholland  137: #define        di_ogid         di_oldids[1]
        !           138: #define        di_ouid         di_oldids[0]
1.1       mycroft   139: #define        di_rdev         di_db[0]
1.22      dholland  140: #define UFS1_MAXSYMLINKLEN     ((UFS_NDADDR + UFS_NIADDR) * sizeof(int32_t))
                    141: #define UFS2_MAXSYMLINKLEN     ((UFS_NDADDR + UFS_NIADDR) * sizeof(int64_t))
1.17      fvdl      142:
1.22      dholland  143: #define UFS_MAXSYMLINKLEN(ip) \
1.17      fvdl      144:        ((ip)->i_ump->um_fstype == UFS1) ? \
1.22      dholland  145:        UFS1_MAXSYMLINKLEN : UFS2_MAXSYMLINKLEN
1.14      dbj       146:
                    147: /* NeXT used to keep short symlinks in the inode even when using
                    148:  * FS_42INODEFMT.  In that case fs->fs_maxsymlinklen is probably -1,
                    149:  * but short symlinks were stored in inodes shorter than this:
                    150:  */
                    151: #define        APPLEUFS_MAXSYMLINKLEN 60
1.1       mycroft   152:
1.5       mycroft   153: /* File permissions. */
1.1       mycroft   154: #define        IEXEC           0000100         /* Executable. */
1.15      wiz       155: #define        IWRITE          0000200         /* Writable. */
1.1       mycroft   156: #define        IREAD           0000400         /* Readable. */
                    157: #define        ISVTX           0001000         /* Sticky bit. */
                    158: #define        ISGID           0002000         /* Set-gid. */
                    159: #define        ISUID           0004000         /* Set-uid. */
                    160:
                    161: /* File types. */
                    162: #define        IFMT            0170000         /* Mask of file type. */
                    163: #define        IFIFO           0010000         /* Named pipe (fifo). */
                    164: #define        IFCHR           0020000         /* Character device. */
                    165: #define        IFDIR           0040000         /* Directory file. */
                    166: #define        IFBLK           0060000         /* Block device. */
                    167: #define        IFREG           0100000         /* Regular file. */
                    168: #define        IFLNK           0120000         /* Symbolic link. */
                    169: #define        IFSOCK          0140000         /* UNIX domain socket. */
1.5       mycroft   170: #define        IFWHT           0160000         /* Whiteout. */
1.9       thorpej   171:
                    172: /* Size of the on-disk inode. */
1.17      fvdl      173: #define        DINODE1_SIZE    (sizeof(struct ufs1_dinode))            /* 128 */
                    174: #define        DINODE2_SIZE    (sizeof(struct ufs2_dinode))
1.13      lukem     175:
                    176: #endif /* !_UFS_UFS_DINODE_H_ */

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