bootx.tproj/fs.subproj/ext2fs_dinode.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*      $NetBSD: ext2fs_dinode.h,v 1.6 2000/01/26 16:21:33 bouyer Exp $ */
  26 /*
  27  * Copyright (c) 1997 Manuel Bouyer.
  28  * Copyright (c) 1982, 1989, 1993
  29  *      The Regents of the University of California.  All rights reserved.
  30  * (c) UNIX System Laboratories, Inc.
  31  * All or some portions of this file are derived from material licensed
  32  * to the University of California by American Telephone and Telegraph
  33  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
  34  * the permission of UNIX System Laboratories, Inc.
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  * 1. Redistributions of source code must retain the above copyright
  40  *    notice, this list of conditions and the following disclaimer.
  41  * 2. Redistributions in binary form must reproduce the above copyright
  42  *    notice, this list of conditions and the following disclaimer in the
  43  *    documentation and/or other materials provided with the distribution.
  44  * 3. All advertising materials mentioning features or use of this software
  45  *    must display the following acknowledgement:
  46  *      This product includes software developed by the University of
  47  *      California, Berkeley and its contributors.
  48  * 4. Neither the name of the University nor the names of its contributors
  49  *    may be used to endorse or promote products derived from this software
  50  *    without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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    8.6 (Berkeley) 9/13/94
  65  *  Modified for ext2fs by Manuel Bouyer.
  66  */
  67 /*
  68  *  ext2fs_dinode.h - Headers for Ext2 disk inode structures.
  69  *
  70  *  Copyright (c) 2000 Apple Computer, Inc.
  71  *
  72  *  DRI: Josh de Cesare
  73  */
  74
  75 /*
  76  * The root inode is the root of the file system.  Inode 0 can't be used for
  77  * normal purposes and bad blocks are normally linked to inode 1, thus
  78  * the root inode is 2.
  79  * Inode 3 to 10 are reserved in ext2fs.
  80  */
  81 #define EXT2_ROOTINO ((ino_t)2)
  82 #define EXT2_FIRSTINO ((ino_t)11)
  83
  84 /*
  85  * A dinode contains all the meta-data associated with a UFS file.
  86  * This structure defines the on-disk format of a dinode. Since
  87  * this structure describes an on-disk structure, all its fields
  88  * are defined by types with precise widths.
  89  */
  90
  91 #define NDADDR  12                      /* Direct addresses in inode. */
  92 #define NIADDR  3                       /* Indirect addresses in inode. */
  93
  94 #define EXT2_MAXSYMLINKLEN ((NDADDR+NIADDR) * sizeof (u_int32_t))
  95
  96 struct ext2fs_dinode {
  97         u_int16_t       e2di_mode;      /*   0: IFMT, permissions; see below. */
  98         u_int16_t       e2di_uid;       /*   2: Owner UID */
  99         u_int32_t       e2di_size;      /*       4: Size (in bytes) */
 100         u_int32_t       e2di_atime;     /*       8: Acces time */
 101         u_int32_t       e2di_ctime;     /*      12: Create time */
 102         u_int32_t       e2di_mtime;     /*      16: Modification time */
 103         u_int32_t       e2di_dtime;     /*      20: Deletion time */
 104         u_int16_t       e2di_gid;       /*  24: Owner GID */
 105         u_int16_t       e2di_nlink;     /*  26: File link count */
 106         u_int32_t       e2di_nblock;    /*  28: Blocks count */
 107         u_int32_t       e2di_flags;     /*  32: Status flags (chflags) */
 108         u_int32_t       e2di_linux_reserved1; /* 36 */
 109         u_int32_t       e2di_blocks[NDADDR+NIADDR]; /* 40: disk blocks */
 110         u_int32_t       e2di_gen;       /* 100: generation number */
 111         u_int32_t       e2di_facl;      /* 104: file ACL (not implemented) */
 112         u_int32_t       e2di_dacl;      /* 108: dir ACL (not implemented) */
 113         u_int32_t       e2di_faddr;     /* 112: fragment address */
 114         u_int8_t        e2di_nfrag;     /* 116: fragment number */
 115         u_int8_t        e2di_fsize;     /* 117: fragment size */
 116         u_int16_t       e2di_linux_reserved2; /* 118 */
 117         u_int32_t       e2di_linux_reserved3[2]; /* 120 */
 118 };
 119
 120
 121
 122 #define E2MAXSYMLINKLEN ((NDADDR + NIADDR) * sizeof(u_int32_t))
 123
 124 /* File permissions. */
 125 #define EXT2_IEXEC              0000100         /* Executable. */
 126 #define EXT2_IWRITE             0000200         /* Writeable. */
 127 #define EXT2_IREAD              0000400         /* Readable. */
 128 #define EXT2_ISVTX              0001000         /* Sticky bit. */
 129 #define EXT2_ISGID              0002000         /* Set-gid. */
 130 #define EXT2_ISUID              0004000         /* Set-uid. */
 131
 132 /* File types. */
 133 #define EXT2_IFMT               0170000         /* Mask of file type. */
 134 #define EXT2_IFIFO              0010000         /* Named pipe (fifo). */
 135 #define EXT2_IFCHR              0020000         /* Character device. */
 136 #define EXT2_IFDIR              0040000         /* Directory file. */
 137 #define EXT2_IFBLK              0060000         /* Block device. */
 138 #define EXT2_IFREG              0100000         /* Regular file. */
 139 #define EXT2_IFLNK              0120000         /* Symbolic link. */
 140 #define EXT2_IFSOCK             0140000         /* UNIX domain socket. */
 141
 142 /* file flags */
 143 #define EXT2_SECRM              0x00000001      /* Secure deletion */
 144 #define EXT2_UNRM               0x00000002      /* Undelete */
 145 #define EXT2_COMPR              0x00000004      /* Compress file */
 146 #define EXT2_SYNC               0x00000008      /* Synchronous updates */
 147 #define EXT2_IMMUTABLE  0x00000010      /* Immutable file */
 148 #define EXT2_APPEND             0x00000020      /* writes to file may only append */
 149 #define EXT2_NODUMP             0x00000040      /* do not dump file */
 150
 151 /* Size of on-disk inode. */
 152 #define EXT2_DINODE_SIZE        (sizeof(struct ext2fs_dinode))  /* 128 */
 153
 154 /*
 155  * The e2di_blocks fields may be overlaid with other information for
 156  * file types that do not have associated disk storage. Block
 157  * and character devices overlay the first data block with their
 158  * dev_t value. Short symbolic links place their path in the
 159  * di_db area.
 160  */
 161
 162 #define e2di_rdev               e2di_blocks[0]
 163 #define e2di_shortlink  e2di_blocks
 164
 165 /* e2fs needs byte swapping on big-endian systems */
 166 #if BYTE_ORDER == LITTLE_ENDIAN
 167 #       define e2fs_iload(old, new) memcpy((new),(old),sizeof(struct ext2fs_dinode))
 168 #       define e2fs_isave(old, new) memcpy((new),(old),sizeof(struct ext2fs_dinode))
 169 #else
 170 void e2fs_i_bswap __P((struct ext2fs_dinode *, struct ext2fs_dinode *));
 171 #       define e2fs_iload(old, new) e2fs_i_bswap((old), (new))
 172 #       define e2fs_isave(old, new) e2fs_i_bswap((old), (new))
 173 #endif