fs/grubfs/ufs_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  * 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: src/sys/ufs/ufs/dinode.h,v 1.13.2.1 2005/01/31 23:27:01 imp Exp $
  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_W 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         uint16_t        di_mode;        /*   0: IFMT, permissions; see below. */
 127         int16_t         di_nlink;       /*   2: File link count. */
 128         uint32_t        di_uid;         /*   4: File owner. */
 129         uint32_t        di_gid;         /*   8: File group. */
 130         uint32_t        di_blksize;     /*  12: Inode blocksize. */
 131         uint64_t        di_size;        /*  16: File byte count. */
 132         uint64_t        di_blocks;      /*  24: Bytes 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         uint32_t        di_kernflags;   /*  84: Kernel flags. */
 143         uint32_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         uint16_t        di_mode;        /*   0: IFMT, permissions; see below. */
 168         int16_t         di_nlink;       /*   2: File link count. */
 169         union {
 170                 uint16_t oldids[2];     /*   4: Ffs: old user and group ids. */
 171         } di_u;
 172         uint64_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         uint32_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         uint32_t        di_uid;         /* 112: File owner. */
 185         uint32_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_ */