sys/ufs/ext2fs/ext2fs_dinode.h

   1 /*      $NetBSD: ext2fs_dinode.h,v 1.21 2009/10/19 18:41:17 bouyer Exp $        */
   2
   3 /*
   4  * Copyright (c) 1982, 1989, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  * (c) UNIX System Laboratories, Inc.
   7  * All or some portions of this file are derived from material licensed
   8  * to the University of California by American Telephone and Telegraph
   9  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
  10  * the permission of UNIX System Laboratories, Inc.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  * 3. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  *      @(#)dinode.h    8.6 (Berkeley) 9/13/94
  37  *  Modified for ext2fs by Manuel Bouyer.
  38  */
  39
  40 /*
  41  * Copyright (c) 1997 Manuel Bouyer.
  42  *
  43  * Redistribution and use in source and binary forms, with or without
  44  * modification, are permitted provided that the following conditions
  45  * are met:
  46  * 1. Redistributions of source code must retain the above copyright
  47  *    notice, this list of conditions and the following disclaimer.
  48  * 2. Redistributions in binary form must reproduce the above copyright
  49  *    notice, this list of conditions and the following disclaimer in the
  50  *    documentation and/or other materials provided with the distribution.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  53  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  54  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  55  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  56  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  57  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  58  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  59  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  60  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  61  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  62  *
  63  *      @(#)dinode.h    8.6 (Berkeley) 9/13/94
  64  *  Modified for ext2fs by Manuel Bouyer.
  65  */
  66
  67 #ifndef _UFS_EXT2FS_EXT2FS_DINODE_H_
  68 #define _UFS_EXT2FS_EXT2FS_DINODE_H_
  69
  70 #include <sys/stat.h>
  71
  72 /*
  73  * The root inode is the root of the file system.  Inode 0 can't be used for
  74  * normal purposes and bad blocks are normally linked to inode 1, thus
  75  * the root inode is 2.
  76  * Inode 3 to 10 are reserved in ext2fs.
  77  */
  78 #define EXT2_BADBLKINO          ((ino_t)1)
  79 #define EXT2_ROOTINO            ((ino_t)2)
  80 #define EXT2_ACLIDXINO          ((ino_t)3)
  81 #define EXT2_ACLDATAINO         ((ino_t)4)
  82 #define EXT2_BOOTLOADERINO      ((ino_t)5)
  83 #define EXT2_UNDELDIRINO        ((ino_t)6)
  84 #define EXT2_RESIZEINO          ((ino_t)7)
  85 #define EXT2_JOURNALINO         ((ino_t)8)
  86 #define EXT2_FIRSTINO           ((ino_t)11)
  87
  88 /*
  89  * A dinode contains all the meta-data associated with a UFS file.
  90  * This structure defines the on-disk format of a dinode. Since
  91  * this structure describes an on-disk structure, all its fields
  92  * are defined by types with precise widths.
  93  */
  94
  95 #define NDADDR  12                      /* Direct addresses in inode. */
  96 #define NIADDR  3                       /* Indirect addresses in inode. */
  97
  98 #define EXT2_MAXSYMLINKLEN ((NDADDR+NIADDR) * sizeof (uint32_t))
  99
 100 struct ext2fs_dinode {
 101         uint16_t        e2di_mode;      /*   0: IFMT, permissions; see below. */
 102         uint16_t        e2di_uid;       /*   2: Owner UID */
 103         uint32_t        e2di_size;      /*       4: Size (in bytes) */
 104         uint32_t        e2di_atime;     /*       8: Acces time */
 105         uint32_t        e2di_ctime;     /*      12: Create time */
 106         uint32_t        e2di_mtime;     /*      16: Modification time */
 107         uint32_t        e2di_dtime;     /*      20: Deletion time */
 108         uint16_t        e2di_gid;       /*  24: Owner GID */
 109         uint16_t        e2di_nlink;     /*  26: File link count */
 110         uint32_t        e2di_nblock;    /*  28: Blocks count */
 111         uint32_t        e2di_flags;     /*  32: Status flags (chflags) */
 112         uint32_t        e2di_linux_reserved1; /* 36 */
 113         uint32_t        e2di_blocks[NDADDR+NIADDR]; /* 40: disk blocks */
 114         uint32_t        e2di_gen;       /* 100: generation number */
 115         uint32_t        e2di_facl;      /* 104: file ACL (not implemented) */
 116         uint32_t        e2di_dacl;      /* 108: dir ACL (not implemented) */
 117         uint32_t        e2di_faddr;     /* 112: fragment address */
 118         uint8_t         e2di_nfrag;     /* 116: fragment number */
 119         uint8_t         e2di_fsize;     /* 117: fragment size */
 120         uint16_t        e2di_linux_reserved2; /* 118 */
 121         uint16_t        e2di_uid_high;  /* 120: Owner UID top 16 bits */
 122         uint16_t        e2di_gid_high;  /* 122: Owner GID top 16 bits */
 123         uint32_t        e2di_linux_reserved3; /* 124 */
 124 };
 125
 126
 127
 128 #define E2MAXSYMLINKLEN ((NDADDR + NIADDR) * sizeof(uint32_t))
 129
 130 /* File permissions. */
 131 #define EXT2_IEXEC              0000100         /* Executable. */
 132 #define EXT2_IWRITE             0000200         /* Writable. */
 133 #define EXT2_IREAD              0000400         /* Readable. */
 134 #define EXT2_ISVTX              0001000         /* Sticky bit. */
 135 #define EXT2_ISGID              0002000         /* Set-gid. */
 136 #define EXT2_ISUID              0004000         /* Set-uid. */
 137
 138 /* File types. */
 139 #define EXT2_IFMT               0170000         /* Mask of file type. */
 140 #define EXT2_IFIFO              0010000         /* Named pipe (fifo). */
 141 #define EXT2_IFCHR              0020000         /* Character device. */
 142 #define EXT2_IFDIR              0040000         /* Directory file. */
 143 #define EXT2_IFBLK              0060000         /* Block device. */
 144 #define EXT2_IFREG              0100000         /* Regular file. */
 145 #define EXT2_IFLNK              0120000         /* Symbolic link. */
 146 #define EXT2_IFSOCK             0140000         /* UNIX domain socket. */
 147
 148 /* file flags */
 149 #define EXT2_SECRM              0x00000001      /* Secure deletion */
 150 #define EXT2_UNRM               0x00000002      /* Undelete */
 151 #define EXT2_COMPR              0x00000004      /* Compress file */
 152 #define EXT2_SYNC               0x00000008      /* Synchronous updates */
 153 #define EXT2_IMMUTABLE          0x00000010      /* Immutable file */
 154 #define EXT2_APPEND             0x00000020 /* writes to file may only append */
 155 #define EXT2_NODUMP             0x00000040      /* do not dump file */
 156
 157 /* Size of on-disk inode. */
 158 #define EXT2_REV0_DINODE_SIZE   sizeof(struct ext2fs_dinode)
 159 #define EXT2_DINODE_SIZE(fs)    ((fs)->e2fs.e2fs_rev > E2FS_REV0 ?      \
 160                                     (fs)->e2fs.e2fs_inode_size :        \
 161                                     EXT2_REV0_DINODE_SIZE)
 162
 163 /*
 164  * The e2di_blocks fields may be overlaid with other information for
 165  * file types that do not have associated disk storage. Block
 166  * and character devices overlay the first data block with their
 167  * dev_t value. Short symbolic links place their path in the
 168  * di_db area.
 169  */
 170
 171 #define e2di_rdev               e2di_blocks[0]
 172 #define e2di_shortlink          e2di_blocks
 173
 174 /* e2fs needs byte swapping on big-endian systems */
 175 #if BYTE_ORDER == LITTLE_ENDIAN
 176 #       define e2fs_iload(old, new)     \
 177                 memcpy((new),(old),sizeof(struct ext2fs_dinode))
 178 #       define e2fs_isave(old, new)     \
 179                 memcpy((new),(old),sizeof(struct ext2fs_dinode))
 180 #else
 181 void e2fs_i_bswap(struct ext2fs_dinode *, struct ext2fs_dinode *);
 182 #       define e2fs_iload(old, new) e2fs_i_bswap((old), (new))
 183 #       define e2fs_isave(old, new) e2fs_i_bswap((old), (new))
 184 #endif
 185
 186 #endif /* !_UFS_EXT2FS_EXT2FS_DINODE_H_ */