sys/boot/common/dinode.h

   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  * Copyright (c) 1982, 1989, 1993
  12  *      The Regents of the University of California.  All rights reserved.
  13  * (c) UNIX System Laboratories, Inc.
  14  * All or some portions of this file are derived from material licensed
  15  * to the University of California by American Telephone and Telegraph
  16  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
  17  * the permission of UNIX System Laboratories, Inc.
  18  *
  19  * Redistribution and use in source and binary forms, with or without
  20  * modification, are permitted provided that the following conditions
  21  * are met:
  22  * 1. Redistributions of source code must retain the above copyright
  23  *    notice, this list of conditions and the following disclaimer.
  24  * 2. Redistributions in binary form must reproduce the above copyright
  25  *    notice, this list of conditions and the following disclaimer in the
  26  *    documentation and/or other materials provided with the distribution.
  27  * 3. The names of the authors may not be used to endorse or promote
  28  *    products derived from this software without specific prior written
  29  *    permission.
  30  *
  31  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  32  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  33  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  34  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  35  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  39  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  40  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  41  * SUCH DAMAGE.
  42  *
  43  *      @(#)dinode.h    8.3 (Berkeley) 1/21/94
  44  * $FreeBSD: src/sys/ufs/ufs/dinode.h,v 1.11 2002/07/16 22:36:00 mckusick Exp $
  45  * $DragonFly: src/sys/boot/common/dinode.h,v 1.2 2006/09/10 01:26:30 dillon Exp $
  46  */
  47
  48 #ifndef _UFS_UFS_DINODE_H_
  49 #define _UFS_UFS_DINODE_H_
  50
  51 /*
  52  * The root inode is the root of the filesystem.  Inode 0 can't be used for
  53  * normal purposes and historically bad blocks were linked to inode 1, thus
  54  * the root inode is 2.  (Inode 1 is no longer used for this purpose, however
  55  * numerous dump tapes make this assumption, so we are stuck with it).
  56  */
  57 #define ROOTINO ((ino_t)2)
  58
  59 /*
  60  * The Whiteout inode# is a dummy non-zero inode number which will
  61  * never be allocated to a real file.  It is used as a place holder
  62  * in the directory entry which has been tagged as a DT_W entry.
  63  * See the comments about ROOTINO above.
  64  */
  65 #define WINO    ((ino_t)1)
  66
  67 /*
  68  * The size of physical and logical block numbers and time fields in UFS.
  69  */
  70 typedef int32_t ufs1_daddr_t;
  71 typedef int64_t ufs2_daddr_t;
  72 typedef int64_t ufs_lbn_t;
  73 typedef int64_t ufs_time_t;
  74
  75 /* File permissions. */
  76 #define IEXEC           0000100         /* Executable. */
  77 #define IWRITE          0000200         /* Writeable. */
  78 #define IREAD           0000400         /* Readable. */
  79 #define ISVTX           0001000         /* Sticky bit. */
  80 #define ISGID           0002000         /* Set-gid. */
  81 #define ISUID           0004000         /* Set-uid. */
  82
  83 /* File types. */
  84 #define IFMT            0170000         /* Mask of file type. */
  85 #define IFIFO           0010000         /* Named pipe (fifo). */
  86 #define IFCHR           0020000         /* Character device. */
  87 #define IFDIR           0040000         /* Directory file. */
  88 #define IFBLK           0060000         /* Block device. */
  89 #define IFREG           0100000         /* Regular file. */
  90 #define IFLNK           0120000         /* Symbolic link. */
  91 #define IFSOCK          0140000         /* UNIX domain socket. */
  92 #define IFWHT           0160000         /* Whiteout. */
  93
  94 /*
  95  * A dinode contains all the meta-data associated with a UFS2 file.
  96  * This structure defines the on-disk format of a dinode. Since
  97  * this structure describes an on-disk structure, all its fields
  98  * are defined by types with precise widths.
  99  */
 100
 101 #define NXADDR  2                       /* External addresses in inode. */
 102 #define NDADDR  12                      /* Direct addresses in inode. */
 103 #define NIADDR  3                       /* Indirect addresses in inode. */
 104
 105 struct ufs2_dinode {
 106         u_int16_t       di_mode;        /*   0: IFMT, permissions; see below. */
 107         int16_t         di_nlink;       /*   2: File link count. */
 108         u_int32_t       di_uid;         /*   4: File owner. */
 109         u_int32_t       di_gid;         /*   8: File group. */
 110         u_int32_t       di_blksize;     /*  12: Inode blocksize. */
 111         u_int64_t       di_size;        /*  16: File byte count. */
 112         u_int64_t       di_blocks;      /*  24: Bytes actually held. */
 113         ufs_time_t      di_atime;       /*  32: Last access time. */
 114         ufs_time_t      di_mtime;       /*  40: Last modified time. */
 115         ufs_time_t      di_ctime;       /*  48: Last inode change time. */
 116         ufs_time_t      di_birthtime;   /*  56: Inode creation time. */
 117         int32_t         di_mtimensec;   /*  64: Last modified time. */
 118         int32_t         di_atimensec;   /*  68: Last access time. */
 119         int32_t         di_ctimensec;   /*  72: Last inode change time. */
 120         int32_t         di_birthnsec;   /*  76: Inode creation time. */
 121         int32_t         di_gen;         /*  80: Generation number. */
 122         u_int32_t       di_kernflags;   /*  84: Kernel flags. */
 123         u_int32_t       di_flags;       /*  88: Status flags (chflags). */
 124         int32_t         di_extsize;     /*  92: External attributes block. */
 125         ufs2_daddr_t    di_extb[NXADDR];/*  96: External attributes block. */
 126         ufs2_daddr_t    di_db[NDADDR];  /* 112: Direct disk blocks. */
 127         ufs2_daddr_t    di_ib[NIADDR];  /* 208: Indirect disk blocks. */
 128         int64_t         di_spare[3];    /* 232: Reserved; currently unused */
 129 };
 130
 131 /*
 132  * The di_db fields may be overlaid with other information for
 133  * file types that do not have associated disk storage. Block
 134  * and character devices overlay the first data block with their
 135  * cdev_t value. Short symbolic links place their path in the
 136  * di_db area.
 137  */
 138 #define di_rdev di_db[0]
 139
 140 /*
 141  * A UFS1 dinode contains all the meta-data associated with a UFS1 file.
 142  * This structure defines the on-disk format of a UFS1 dinode. Since
 143  * this structure describes an on-disk structure, all its fields
 144  * are defined by types with precise widths.
 145  */
 146 struct ufs1_dinode {
 147         u_int16_t       di_mode;        /*   0: IFMT, permissions; see below. */
 148         int16_t         di_nlink;       /*   2: File link count. */
 149         union {
 150                 u_int16_t oldids[2];    /*   4: Ffs: old user and group ids. */
 151         } di_u;
 152         u_int64_t       di_size;        /*   8: File byte count. */
 153         int32_t         di_atime;       /*  16: Last access time. */
 154         int32_t         di_atimensec;   /*  20: Last access time. */
 155         int32_t         di_mtime;       /*  24: Last modified time. */
 156         int32_t         di_mtimensec;   /*  28: Last modified time. */
 157         int32_t         di_ctime;       /*  32: Last inode change time. */
 158         int32_t         di_ctimensec;   /*  36: Last inode change time. */
 159         ufs1_daddr_t    di_db[NDADDR];  /*  40: Direct disk blocks. */
 160         ufs1_daddr_t    di_ib[NIADDR];  /*  88: Indirect disk blocks. */
 161         u_int32_t       di_flags;       /* 100: Status flags (chflags). */
 162         int32_t         di_blocks;      /* 104: Blocks actually held. */
 163         int32_t         di_gen;         /* 108: Generation number. */
 164         u_int32_t       di_uid;         /* 112: File owner. */
 165         u_int32_t       di_gid;         /* 116: File group. */
 166         int32_t         di_spare[2];    /* 120: Reserved; currently unused */
 167 };
 168 #define di_ogid         di_u.oldids[1]
 169 #define di_ouid         di_u.oldids[0]
 170
 171 #endif /* _UFS_UFS_DINODE_H_ */