Subversion Repositories HelenOS

Rev

Rev 2404 | Go to most recent revision | Blame | Last modification | View Log | Download | RSS feed

  1. /*
  2.  * Copyright (c) 1987,1997, Prentice Hall
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use of the MINIX operating system in source and
  6.  * binary forms, with or without modification, are permitted provided
  7.  * that the following conditions are met:
  8.  
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  
  12.  * - Redistributions in binary form must reproduce the above
  13.  *   copyright notice, this list of conditions and the following
  14.  *   disclaimer in the documentation and/or other materials provided
  15.  *   with the distribution.
  16.  
  17.  * - Neither the name of Prentice Hall nor the names of the software
  18.  *   authors or contributors may be used to endorse or promote
  19.  *   products derived from this software without specific prior
  20.  *   written permission.
  21.  
  22.  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS, AUTHORS, AND
  23.  * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
  24.  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  25.  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  26.  * IN NO EVENT SHALL PRENTICE HALL OR ANY AUTHORS OR CONTRIBUTORS BE
  27.  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  28.  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  29.  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  30.  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  31.  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
  32.  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
  33.  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34.  */
  35.  
  36. /** @addtogroup FileSystemImpl
  37. * @{
  38. */
  39.  
  40. /**
  41.  * @file    block.h
  42.  * @brief   Data block.
  43.  */
  44.  
  45. #ifndef _BLOCK_H
  46. #define _BLOCK_H
  47.  
  48. #include "dir.h"
  49.  
  50. #define DIRECTORY_BLOCK   1             /**< directory block */
  51. #define INDIRECT_BLOCK    2             /**< pointer block */
  52.  
  53. /**
  54.  * Data block
  55.  */
  56. typedef struct {
  57.    union {
  58.     char b__data[BLOCK_SIZE];               /**< ordinary user data */
  59.     direct_t b__dir[NR_DIR_ENTRIES];            /**< directory block */
  60.     directex_t b__direx[NR_DIR_ENTRIES_EX];     /**< extended directory block */
  61.     zone1_t b__v1_ind[V1_INDIRECTS];            /**< V1 indirect block */
  62.         zone_t  b__v2_ind[V2_INDIRECTS];            /**< V2 indirect block */
  63.     d1_inode_t b__v1_ino[V1_INODES_PER_BLOCK];  /**< V1 inode block */
  64.         d2_inode_t b__v2_ino[V2_INODES_PER_BLOCK];  /**< V2 inode block */
  65.    } b;
  66.  
  67.    block_num_t b_blocknr;           /**< number of block */
  68.    char b_count;                        /**< number of users of this block */
  69. } block_t;
  70.  
  71. extern block_t* work_block;
  72.  
  73. #endif /* _BLOCK_H */
  74.  
  75. /**
  76.  * }
  77.  */
  78.  
  79.