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2404 | konopa | 1 | /* |
2 | * Copyright (c) 1987,1997, Prentice Hall |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use of the MINIX operating system in source and |
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6 | * binary forms, with or without modification, are permitted provided |
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7 | * that the following conditions are met: |
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8 | |||
9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | |||
12 | * - Redistributions in binary form must reproduce the above |
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13 | * copyright notice, this list of conditions and the following |
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14 | * disclaimer in the documentation and/or other materials provided |
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15 | * with the distribution. |
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16 | |||
17 | * - Neither the name of Prentice Hall nor the names of the software |
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18 | * authors or contributors may be used to endorse or promote |
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19 | * products derived from this software without specific prior |
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20 | * written permission. |
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21 | |||
22 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS, AUTHORS, AND |
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23 | * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, |
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24 | * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
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25 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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26 | * IN NO EVENT SHALL PRENTICE HALL OR ANY AUTHORS OR CONTRIBUTORS BE |
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27 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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28 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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29 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
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30 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
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31 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
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32 | * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, |
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33 | * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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34 | */ |
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35 | |||
36 | |||
2364 | konopa | 37 | /* Constants of all file system. Some of them are not used here in |
38 | * current version, but will be used in later versions probably. |
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39 | */ |
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40 | |||
41 | #ifndef _CONST_H |
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42 | #define _CONST_H |
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43 | |||
44 | /* Defined in ../share/base_const.h */ |
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45 | /* |
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46 | #define FALSE 0 |
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47 | #define TRUE 1 |
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48 | #define OK 0 |
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49 | */ |
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50 | |||
51 | #define BLOCK_SIZE 1024 /* # bytes in a disk block */ |
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52 | #define MAJOR 8 /* major device = (dev>>MAJOR) & 0377 */ |
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53 | #define MINOR 0 /* minor device = (dev>>MINOR) & 0377 */ |
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54 | #define BYTE 0377 /* mask for 8 bits */ |
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55 | #define NO_NUM 0x8000 /* used as numerical argument to panic() */ |
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56 | |||
57 | /* Not used here. */ |
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58 | #define NR_SEGS 3 /* # segments per process */ |
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59 | #define T 0 /* proc[i].mem_map[T] is for text */ |
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60 | #define D 1 /* proc[i].mem_map[D] is for data */ |
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61 | #define S 2 /* proc[i].mem_map[S] is for stack */ |
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62 | |||
63 | #define MAX(a, b) ((a) > (b) ? (a) : (b)) |
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64 | #define MIN(a, b) ((a) < (b) ? (a) : (b)) |
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65 | |||
66 | #define I_NOT_ALLOC 0000000 /* this inode is free */ |
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67 | |||
68 | #define I_TYPE 0170000 /* this field gives inode type */ |
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69 | #define I_REGULAR 0100000 /* regular file, not dir or special */ |
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70 | #define I_DIRECTORY 0040000 /* file is a directory */ |
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71 | #define I_BLOCK_SPECIAL 0060000 /* block special file */ |
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72 | #define I_CHAR_SPECIAL 0020000 /* character special file */ |
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73 | |||
74 | #define MAX_FILE_POS ((off_t) 037777777777) /* largest legal file offset */ |
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75 | |||
76 | #define R_BIT 0000004 /* Rwx protection bit */ |
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77 | #define W_BIT 0000002 /* rWx protection bit */ |
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78 | #define X_BIT 0000001 /* rwX protection bit */ |
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79 | |||
80 | #define NO_BLOCK ((block_num_t) 0) /* absence of a block number */ |
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81 | #define NO_ZONE ((zone_t) 0) /* absence of a zone number */ |
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82 | #define NO_DEV ((dev_t) 0) /* absence of a device numb */ |
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83 | |||
84 | |||
85 | /* Tables sizes. */ |
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86 | #define V1_NR_DZONES 7 /* # direct zone numbers in a V1 inode */ |
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87 | #define V1_NR_TZONES 9 /* total # zone numbers in a V1 inode */ |
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88 | #define V2_NR_DZONES 7 /* # direct zone numbers in a V2 inode */ |
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89 | #define V2_NR_TZONES 10 /* total # zone numbers in a V2 inode */ |
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90 | |||
91 | #define NR_FILPS 128 /* # slots in filp table */ |
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92 | #define NR_INODES 64 /* # slots in "in core" inode table */ |
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93 | |||
94 | |||
95 | /* The type of sizeof may be (unsigned) long. Use the following macro for |
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96 | * taking the sizes of small objects so that there are no surprises like |
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97 | * (small) long constants being passed to routines expecting an int. |
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98 | */ |
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99 | #define usizeof(t) ((unsigned) sizeof(t)) |
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100 | |||
101 | |||
102 | /* File system macros corresponding with given versions. */ |
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103 | #define SUPER_MAGIC 0x137F /* magic number for V1 file systems */ |
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104 | #define SUPER_MAGIC2 0x138F /* magic number for V1 file systems - 30 char names */ |
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105 | #define SUPER_V2 0x2468 /* magic number for V2 file systems */ |
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106 | #define SUPER_V2E 0x2478 /* magic number for V2 file systems - 30 char names */ |
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107 | |||
108 | #define TOTAL_VERSIONS 2 /* number of versions of file system */ |
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109 | |||
110 | #define V1 1 /* version number of V2 file systems */ |
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111 | #define V2 2 /* version number of V2 file systems */ |
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112 | |||
113 | #define LOOK_UP 0 /* tells search_dir to lookup string */ |
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114 | #define IS_EMPTY 3 /* tells search_dir to ret. OK or ENOTEMPTY */ |
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115 | |||
116 | #define BYTE_SWAP 0 /* tells conv2/conv4 to swap bytes */ |
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117 | #define DONT_SWAP 1 /* tells conv2/conv4 not to swap bytes */ |
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118 | |||
119 | #define END_OF_FILE (-104) /* eof detected */ |
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120 | |||
121 | #define ROOT_INODE 1 /* inode number for root directory */ |
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122 | #define BOOT_BLOCK ((block_num_t) 0) /* block number of boot block */ |
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123 | #define SUPER_BLOCK ((block_num_t) 1) /* block number of super block */ |
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124 | |||
125 | /* For normal version. */ |
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126 | #define DIR_ENTRY_SIZE usizeof (direct_t) /* # bytes/dir entry */ |
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127 | #define NR_DIR_ENTRIES (BLOCK_SIZE/DIR_ENTRY_SIZE) /* # dir entries/blk */ |
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128 | |||
129 | /* For extended version. */ |
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130 | #define DIR_ENTRY_SIZE_EX usizeof (directex_t) /* # bytes/dir entry */ |
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131 | #define NR_DIR_ENTRIES_EX (BLOCK_SIZE/DIR_ENTRY_SIZE_EX) /* # dir entries/blk */ |
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132 | |||
133 | #define SUPER_SIZE usizeof (super_block_t) /* super_block size */ |
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134 | |||
135 | |||
136 | /* Derived sizes pertaining to the V1 file system. */ |
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137 | #define V1_ZONE_NUM_SIZE usizeof (zone1_t) /* # bytes in V1 zone */ |
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138 | #define V1_INODE_SIZE usizeof (d1_inode_t) /* bytes in V1 dsk ino */ |
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139 | #define V1_INDIRECTS (BLOCK_SIZE/V1_ZONE_NUM_SIZE) /* # zones/indir block */ |
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140 | #define V1_INODES_PER_BLOCK (BLOCK_SIZE/V1_INODE_SIZE)/* # V1 dsk inodes/blk */ |
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141 | |||
142 | /* Derived sizes pertaining to the V2 file system. */ |
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143 | #define V2_ZONE_NUM_SIZE usizeof (zone_t) /* # bytes in V2 zone */ |
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144 | #define V2_INODE_SIZE usizeof (d2_inode_t) /* bytes in V2 dsk ino */ |
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145 | #define V2_INDIRECTS (BLOCK_SIZE/V2_ZONE_NUM_SIZE) /* # zones/indir block */ |
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146 | #define V2_INODES_PER_BLOCK (BLOCK_SIZE/V2_INODE_SIZE)/* # V2 dsk inodes/blk */ |
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147 | |||
148 | |||
149 | /* Filesystem supported operations. */ |
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150 | #define FS_NEW_CONSUMER (FIRST_USER_METHOD + 50) /* this is not file system system call */ |
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2401 | konopa | 151 | #define FS_DROP_CONSUMER (FS_NEW_CONSUMER + 1) /* drops connected consument */ |
2364 | konopa | 152 | |
153 | #define FS_BASE FIRST_USER_METHOD |
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154 | #define FS_NOSYS (0 + FS_BASE) |
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155 | #define FS_OPEN (1 + FS_BASE) |
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156 | #define FS_SEEK (2 + FS_BASE) |
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157 | #define FS_READ (3 + FS_BASE) |
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158 | #define FS_CLOSE (4 + FS_BASE) |
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159 | #define FS_CHDIR (5 + FS_BASE) |
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160 | #define FS_STAT (6 + FS_BASE) |
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161 | #define FS_FSTAT (7 + FS_BASE) |
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162 | #define FS_DSUM (8 + FS_BASE) |
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163 | #define FS_READENTRY (9 + FS_BASE) |
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164 | |||
165 | #define FS_CALLS 10 |
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166 | |||
167 | #define FS_MIN (FS_BASE) |
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168 | #define FS_MAX (FS_BASE + FS_CALLS) |
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169 | |||
170 | #define FS_IN_RANGE(VAL) ((FS_MIN <= VAL && VAL < FS_MAX)? TRUE:FALSE) |
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171 | |||
172 | /* Number of attempts the FS will try to connect to each defined services. */ |
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173 | #define CON_CONN_ATTEMPTS 1000 |
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174 | #define RD_CONN_ATTEMPTS 1000 |
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175 | |||
176 | #endif /* _CONST_H */ |