The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/ufs/ufs/dinode.h

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    1 /*-
    2  * Copyright (c) 2002 Networks Associates Technology, Inc.
    3  * All rights reserved.
    4  *
    5  * This software was developed for the FreeBSD Project by Marshall
    6  * Kirk McKusick and Network Associates Laboratories, the Security
    7  * Research Division of Network Associates, Inc. under DARPA/SPAWAR
    8  * contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS
    9  * research program
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice, this list of conditions and the following disclaimer.
   16  * 2. Redistributions in binary form must reproduce the above copyright
   17  *    notice, this list of conditions and the following disclaimer in the
   18  *    documentation and/or other materials provided with the distribution.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  *
   32  * Copyright (c) 1982, 1989, 1993
   33  *      The Regents of the University of California.  All rights reserved.
   34  * (c) UNIX System Laboratories, Inc.
   35  * All or some portions of this file are derived from material licensed
   36  * to the University of California by American Telephone and Telegraph
   37  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
   38  * the permission of UNIX System Laboratories, Inc.
   39  *
   40  * Redistribution and use in source and binary forms, with or without
   41  * modification, are permitted provided that the following conditions
   42  * are met:
   43  * 1. Redistributions of source code must retain the above copyright
   44  *    notice, this list of conditions and the following disclaimer.
   45  * 2. Redistributions in binary form must reproduce the above copyright
   46  *    notice, this list of conditions and the following disclaimer in the
   47  *    documentation and/or other materials provided with the distribution.
   48  * 3. The names of the authors may not be used to endorse or promote
   49  *    products derived from this software without specific prior written
   50  *    permission.
   51  *
   52  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   53  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   54  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   55  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   56  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   57  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   58  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   59  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   60  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   61  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   62  * SUCH DAMAGE.
   63  *
   64  *      @(#)dinode.h    8.3 (Berkeley) 1/21/94
   65  * $FreeBSD: releng/7.4/sys/ufs/ufs/dinode.h 158802 2006-05-21 21:55:29Z maxim $
   66  */
   67 
   68 #ifndef _UFS_UFS_DINODE_H_
   69 #define _UFS_UFS_DINODE_H_
   70 
   71 /*
   72  * The root inode is the root of the filesystem.  Inode 0 can't be used for
   73  * normal purposes and historically bad blocks were linked to inode 1, thus
   74  * the root inode is 2.  (Inode 1 is no longer used for this purpose, however
   75  * numerous dump tapes make this assumption, so we are stuck with it).
   76  */
   77 #define ROOTINO ((ino_t)2)
   78 
   79 /*
   80  * The Whiteout inode# is a dummy non-zero inode number which will
   81  * never be allocated to a real file.  It is used as a place holder
   82  * in the directory entry which has been tagged as a DT_WHT entry.
   83  * See the comments about ROOTINO above.
   84  */
   85 #define WINO    ((ino_t)1)
   86 
   87 /*
   88  * The size of physical and logical block numbers and time fields in UFS.
   89  */
   90 typedef int32_t ufs1_daddr_t;
   91 typedef int64_t ufs2_daddr_t;
   92 typedef int64_t ufs_lbn_t;
   93 typedef int64_t ufs_time_t;
   94 
   95 /* File permissions. */
   96 #define IEXEC           0000100         /* Executable. */
   97 #define IWRITE          0000200         /* Writeable. */
   98 #define IREAD           0000400         /* Readable. */
   99 #define ISVTX           0001000         /* Sticky bit. */
  100 #define ISGID           0002000         /* Set-gid. */
  101 #define ISUID           0004000         /* Set-uid. */
  102 
  103 /* File types. */
  104 #define IFMT            0170000         /* Mask of file type. */
  105 #define IFIFO           0010000         /* Named pipe (fifo). */
  106 #define IFCHR           0020000         /* Character device. */
  107 #define IFDIR           0040000         /* Directory file. */
  108 #define IFBLK           0060000         /* Block device. */
  109 #define IFREG           0100000         /* Regular file. */
  110 #define IFLNK           0120000         /* Symbolic link. */
  111 #define IFSOCK          0140000         /* UNIX domain socket. */
  112 #define IFWHT           0160000         /* Whiteout. */
  113 
  114 /*
  115  * A dinode contains all the meta-data associated with a UFS2 file.
  116  * This structure defines the on-disk format of a dinode. Since
  117  * this structure describes an on-disk structure, all its fields
  118  * are defined by types with precise widths.
  119  */
  120 
  121 #define NXADDR  2                       /* External addresses in inode. */
  122 #define NDADDR  12                      /* Direct addresses in inode. */
  123 #define NIADDR  3                       /* Indirect addresses in inode. */
  124 
  125 struct ufs2_dinode {
  126         u_int16_t       di_mode;        /*   0: IFMT, permissions; see below. */
  127         int16_t         di_nlink;       /*   2: File link count. */
  128         u_int32_t       di_uid;         /*   4: File owner. */
  129         u_int32_t       di_gid;         /*   8: File group. */
  130         u_int32_t       di_blksize;     /*  12: Inode blocksize. */
  131         u_int64_t       di_size;        /*  16: File byte count. */
  132         u_int64_t       di_blocks;      /*  24: Blocks actually held. */
  133         ufs_time_t      di_atime;       /*  32: Last access time. */
  134         ufs_time_t      di_mtime;       /*  40: Last modified time. */
  135         ufs_time_t      di_ctime;       /*  48: Last inode change time. */
  136         ufs_time_t      di_birthtime;   /*  56: Inode creation time. */
  137         int32_t         di_mtimensec;   /*  64: Last modified time. */
  138         int32_t         di_atimensec;   /*  68: Last access time. */
  139         int32_t         di_ctimensec;   /*  72: Last inode change time. */
  140         int32_t         di_birthnsec;   /*  76: Inode creation time. */
  141         int32_t         di_gen;         /*  80: Generation number. */
  142         u_int32_t       di_kernflags;   /*  84: Kernel flags. */
  143         u_int32_t       di_flags;       /*  88: Status flags (chflags). */
  144         int32_t         di_extsize;     /*  92: External attributes block. */
  145         ufs2_daddr_t    di_extb[NXADDR];/*  96: External attributes block. */
  146         ufs2_daddr_t    di_db[NDADDR];  /* 112: Direct disk blocks. */
  147         ufs2_daddr_t    di_ib[NIADDR];  /* 208: Indirect disk blocks. */
  148         int64_t         di_spare[3];    /* 232: Reserved; currently unused */
  149 };
  150 
  151 /*
  152  * The di_db fields may be overlaid with other information for
  153  * file types that do not have associated disk storage. Block
  154  * and character devices overlay the first data block with their
  155  * dev_t value. Short symbolic links place their path in the
  156  * di_db area.
  157  */
  158 #define di_rdev di_db[0]
  159 
  160 /*
  161  * A UFS1 dinode contains all the meta-data associated with a UFS1 file.
  162  * This structure defines the on-disk format of a UFS1 dinode. Since
  163  * this structure describes an on-disk structure, all its fields
  164  * are defined by types with precise widths.
  165  */
  166 struct ufs1_dinode {
  167         u_int16_t       di_mode;        /*   0: IFMT, permissions; see below. */
  168         int16_t         di_nlink;       /*   2: File link count. */
  169         union {
  170                 u_int16_t oldids[2];    /*   4: Ffs: old user and group ids. */
  171         } di_u;
  172         u_int64_t       di_size;        /*   8: File byte count. */
  173         int32_t         di_atime;       /*  16: Last access time. */
  174         int32_t         di_atimensec;   /*  20: Last access time. */
  175         int32_t         di_mtime;       /*  24: Last modified time. */
  176         int32_t         di_mtimensec;   /*  28: Last modified time. */
  177         int32_t         di_ctime;       /*  32: Last inode change time. */
  178         int32_t         di_ctimensec;   /*  36: Last inode change time. */
  179         ufs1_daddr_t    di_db[NDADDR];  /*  40: Direct disk blocks. */
  180         ufs1_daddr_t    di_ib[NIADDR];  /*  88: Indirect disk blocks. */
  181         u_int32_t       di_flags;       /* 100: Status flags (chflags). */
  182         int32_t         di_blocks;      /* 104: Blocks actually held. */
  183         int32_t         di_gen;         /* 108: Generation number. */
  184         u_int32_t       di_uid;         /* 112: File owner. */
  185         u_int32_t       di_gid;         /* 116: File group. */
  186         int32_t         di_spare[2];    /* 120: Reserved; currently unused */
  187 };
  188 #define di_ogid         di_u.oldids[1]
  189 #define di_ouid         di_u.oldids[0]
  190 
  191 #endif /* _UFS_UFS_DINODE_H_ */

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