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  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*      $NetBSD: ext2fs_dinode.h,v 1.6 2000/01/26 16:21:33 bouyer Exp $ */
  23 /*
  24  * Copyright (c) 1997 Manuel Bouyer.
  25  * Copyright (c) 1982, 1989, 1993
  26  *      The Regents of the University of California.  All rights reserved.
  27  * (c) UNIX System Laboratories, Inc.
  28  * All or some portions of this file are derived from material licensed
  29  * to the University of California by American Telephone and Telegraph
  30  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
  31  * the permission of UNIX System Laboratories, Inc.
  32  *
  33  * Redistribution and use in source and binary forms, with or without
  34  * modification, are permitted provided that the following conditions
  35  * are met:
  36  * 1. Redistributions of source code must retain the above copyright
  37  *    notice, this list of conditions and the following disclaimer.
  38  * 2. Redistributions in binary form must reproduce the above copyright
  39  *    notice, this list of conditions and the following disclaimer in the
  40  *    documentation and/or other materials provided with the distribution.
  41  * 3. All advertising materials mentioning features or use of this software
  42  *    must display the following acknowledgement:
  43  *      This product includes software developed by the University of
  44  *      California, Berkeley and its contributors.
  45  * 4. Neither the name of the University nor the names of its contributors
  46  *    may be used to endorse or promote products derived from this software
  47  *    without specific prior written permission.
  48  *
  49  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  50  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  51  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  52  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  53  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  54  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  55  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  56  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  57  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  58  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  59  * SUCH DAMAGE.
  60  *
  61  *      @(#)dinode.h    8.6 (Berkeley) 9/13/94
  62  *  Modified for ext2fs by Manuel Bouyer.
  63  */
  64 /*
  65  *  ext2fs_dinode.h - Headers for Ext2 disk inode structures.
  66  *
  67  *  Copyright (c) 2000 Apple Computer, Inc.
  68  *
  69  *  DRI: Josh de Cesare
  70  */
  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_ROOTINO ((ino_t)2)
  79 #define EXT2_FIRSTINO ((ino_t)11)
  80
  81 /*
  82  * A dinode contains all the meta-data associated with a UFS file.
  83  * This structure defines the on-disk format of a dinode. Since
  84  * this structure describes an on-disk structure, all its fields
  85  * are defined by types with precise widths.
  86  */
  87
  88 #define NDADDR  12                      /* Direct addresses in inode. */
  89 #define NIADDR  3                       /* Indirect addresses in inode. */
  90
  91 #define EXT2_MAXSYMLINKLEN ((NDADDR+NIADDR) * sizeof (u_int32_t))
  92
  93 struct ext2fs_dinode {
  94         u_int16_t       e2di_mode;      /*   0: IFMT, permissions; see below. */
  95         u_int16_t       e2di_uid;       /*   2: Owner UID */
  96         u_int32_t       e2di_size;      /*       4: Size (in bytes) */
  97         u_int32_t       e2di_atime;     /*       8: Acces time */
  98         u_int32_t       e2di_ctime;     /*      12: Create time */
  99         u_int32_t       e2di_mtime;     /*      16: Modification time */
 100         u_int32_t       e2di_dtime;     /*      20: Deletion time */
 101         u_int16_t       e2di_gid;       /*  24: Owner GID */
 102         u_int16_t       e2di_nlink;     /*  26: File link count */
 103         u_int32_t       e2di_nblock;    /*  28: Blocks count */
 104         u_int32_t       e2di_flags;     /*  32: Status flags (chflags) */
 105         u_int32_t       e2di_linux_reserved1; /* 36 */
 106         u_int32_t       e2di_blocks[NDADDR+NIADDR]; /* 40: disk blocks */
 107         u_int32_t       e2di_gen;       /* 100: generation number */
 108         u_int32_t       e2di_facl;      /* 104: file ACL (not implemented) */
 109         u_int32_t       e2di_dacl;      /* 108: dir ACL (not implemented) */
 110         u_int32_t       e2di_faddr;     /* 112: fragment address */
 111         u_int8_t        e2di_nfrag;     /* 116: fragment number */
 112         u_int8_t        e2di_fsize;     /* 117: fragment size */
 113         u_int16_t       e2di_linux_reserved2; /* 118 */
 114         u_int32_t       e2di_linux_reserved3[2]; /* 120 */
 115 };
 116
 117
 118
 119 #define E2MAXSYMLINKLEN ((NDADDR + NIADDR) * sizeof(u_int32_t))
 120
 121 /* File permissions. */
 122 #define EXT2_IEXEC              0000100         /* Executable. */
 123 #define EXT2_IWRITE             0000200         /* Writeable. */
 124 #define EXT2_IREAD              0000400         /* Readable. */
 125 #define EXT2_ISVTX              0001000         /* Sticky bit. */
 126 #define EXT2_ISGID              0002000         /* Set-gid. */
 127 #define EXT2_ISUID              0004000         /* Set-uid. */
 128
 129 /* File types. */
 130 #define EXT2_IFMT               0170000         /* Mask of file type. */
 131 #define EXT2_IFIFO              0010000         /* Named pipe (fifo). */
 132 #define EXT2_IFCHR              0020000         /* Character device. */
 133 #define EXT2_IFDIR              0040000         /* Directory file. */
 134 #define EXT2_IFBLK              0060000         /* Block device. */
 135 #define EXT2_IFREG              0100000         /* Regular file. */
 136 #define EXT2_IFLNK              0120000         /* Symbolic link. */
 137 #define EXT2_IFSOCK             0140000         /* UNIX domain socket. */
 138
 139 /* file flags */
 140 #define EXT2_SECRM              0x00000001      /* Secure deletion */
 141 #define EXT2_UNRM               0x00000002      /* Undelete */
 142 #define EXT2_COMPR              0x00000004      /* Compress file */
 143 #define EXT2_SYNC               0x00000008      /* Synchronous updates */
 144 #define EXT2_IMMUTABLE  0x00000010      /* Immutable file */
 145 #define EXT2_APPEND             0x00000020      /* writes to file may only append */
 146 #define EXT2_NODUMP             0x00000040      /* do not dump file */
 147
 148 /* Size of on-disk inode. */
 149 #define EXT2_DINODE_SIZE        (sizeof(struct ext2fs_dinode))  /* 128 */
 150
 151 /*
 152  * The e2di_blocks 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
 159 #define e2di_rdev               e2di_blocks[0]
 160 #define e2di_shortlink  e2di_blocks
 161
 162 /* e2fs needs byte swapping on big-endian systems */
 163 #if BYTE_ORDER == LITTLE_ENDIAN
 164 #       define e2fs_iload(old, new) memcpy((new),(old),sizeof(struct ext2fs_dinode))
 165 #       define e2fs_isave(old, new) memcpy((new),(old),sizeof(struct ext2fs_dinode))
 166 #else
 167 void e2fs_i_bswap __P((struct ext2fs_dinode *, struct ext2fs_dinode *));
 168 #       define e2fs_iload(old, new) e2fs_i_bswap((old), (new))
 169 #       define e2fs_isave(old, new) e2fs_i_bswap((old), (new))
 170 #endif