sys/vfs/ufs/dinode.h

   1 /*-
   2  * Copyright (c) 1982, 1989, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  * (c) UNIX System Laboratories, Inc.
   5  * All or some portions of this file are derived from material licensed
   6  * to the University of California by American Telephone and Telegraph
   7  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
   8  * the permission of UNIX System Laboratories, Inc.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  *      @(#)dinode.h    8.3 (Berkeley) 1/21/94
  35  * $FreeBSD: src/sys/ufs/ufs/dinode.h,v 1.7 1999/08/28 00:52:27 peter Exp $
  36  */
  37
  38 #ifndef _VFS_UFS_DINODE_H_
  39 #define _VFS_UFS_DINODE_H_
  40
  41 #include "ufs_types.h"
  42
  43 /*
  44  * The root inode is the root of the filesystem.  Inode 0 can't be used for
  45  * normal purposes and historically bad blocks were linked to inode 1, thus
  46  * the root inode is 2.  (Inode 1 is no longer used for this purpose, however
  47  * numerous dump tapes make this assumption, so we are stuck with it).
  48  */
  49 #define UFS_ROOTINO     ((ino_t)2)
  50
  51 /*
  52  * The Whiteout inode# is a dummy non-zero inode number which will
  53  * never be allocated to a real file.  It is used as a place holder
  54  * in the directory entry which has been tagged as a DT_W entry.
  55  * See the comments about UFS_ROOTINO above.
  56  */
  57 #define UFS_WINO        ((ino_t)1)
  58
  59 /*
  60  * A dinode contains all the meta-data associated with a UFS file.
  61  * This structure defines the on-disk format of a dinode. Since
  62  * this structure describes an on-disk structure, all its fields
  63  * are defined by types with precise widths.
  64  */
  65
  66 #define UFS_NDADDR      12              /* Direct addresses in inode. */
  67 #define UFS_NIADDR      3               /* Indirect addresses in inode. */
  68
  69 struct ufs1_dinode {
  70         uint16_t        di_mode;        /*   0: IFMT, permissions; see below. */
  71         int16_t         di_nlink;       /*   2: File link count. */
  72         union {
  73                 uint16_t oldids[2];     /*   4: Ffs: old user and group ids. */
  74                 int32_t   inumber;      /*   4: Lfs: inode number. */
  75         } di_u;
  76         uint64_t        di_size;        /*   8: File byte count. */
  77         int32_t         di_atime;       /*  16: Last access time. */
  78         int32_t         di_atimensec;   /*  20: Last access time. */
  79         int32_t         di_mtime;       /*  24: Last modified time. */
  80         int32_t         di_mtimensec;   /*  28: Last modified time. */
  81         int32_t         di_ctime;       /*  32: Last inode change time. */
  82         int32_t         di_ctimensec;   /*  36: Last inode change time. */
  83         ufs_daddr_t     di_db[UFS_NDADDR]; /*  40: Direct disk blocks. */
  84         ufs_daddr_t     di_ib[UFS_NIADDR]; /*  88: Indirect disk blocks. */
  85         uint32_t        di_flags;       /* 100: Status flags (chflags). */
  86         int32_t         di_blocks;      /* 104: Blocks actually held. */
  87         int32_t         di_gen;         /* 108: Generation number. */
  88         uint32_t        di_uid;         /* 112: File owner. */
  89         uint32_t        di_gid;         /* 116: File group. */
  90         union {                         /* 120: File hierarchy modified */
  91             int32_t     spare[2];       /*      (used by ext2fs) */
  92         } di_v;
  93 };
  94
  95 /*
  96  * The di_db fields may be overlaid with other information for
  97  * file types that do not have associated disk storage. Block
  98  * and character devices overlay the first data block with their
  99  * cdev_t value. Short symbolic links place their path in the
 100  * di_db area.
 101  */
 102 #define di_inumber      di_u.inumber
 103 #define di_ogid         di_u.oldids[1]
 104 #define di_ouid         di_u.oldids[0]
 105 #define di_rdev         di_db[0]
 106 #define di_shortlink    di_db
 107 #define di_spare        di_v.spare      /* ext2fs */
 108 #define UFS1_MAXSYMLINKLEN ((UFS_NDADDR + UFS_NIADDR) * sizeof(ufs_daddr_t))
 109
 110 /* File permissions. */
 111 #define IEXEC           0000100         /* Executable. */
 112 #define IWRITE          0000200         /* Writeable. */
 113 #define IREAD           0000400         /* Readable. */
 114 #define ISVTX           0001000         /* Sticky bit. */
 115 #define ISGID           0002000         /* Set-gid. */
 116 #define ISUID           0004000         /* Set-uid. */
 117
 118 /* File types. */
 119 #define IFMT            0170000         /* Mask of file type. */
 120 #define IFIFO           0010000         /* Named pipe (fifo). */
 121 #define IFCHR           0020000         /* Character device. */
 122 #define IFDIR           0040000         /* Directory file. */
 123 #define IFBLK           0060000         /* Block device. */
 124 #define IFREG           0100000         /* Regular file. */
 125 #define IFLNK           0120000         /* Symbolic link. */
 126 #define IFSOCK          0140000         /* UNIX domain socket. */
 127 #define IFWHT           0160000         /* Whiteout. */
 128
 129 #endif /* !_VFS_UFS_DINODE_H_ */