FreeCalypso > hg > freecalypso-sw
annotate gsm-fw/services/ffs/core.h @ 377:d148403013c0
os_mem_fl.c: os_GetPartitionGroupHandle() done
author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> |
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date | Mon, 09 Jun 2014 05:08:11 +0000 |
parents | 847e2585a0f2 |
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rev | line source |
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1 /****************************************************************************** |
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2 * Flash File System (ffs) |
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3 * Idea, design and coding by Mads Meisner-Jensen, mmj@ti.com |
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4 * |
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5 * ffs core functions |
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6 * |
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7 * $Id: core.h 1.80.1.15.1.36 Thu, 08 Jan 2004 15:05:23 +0100 tsj $ |
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8 * |
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9 ******************************************************************************/ |
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10 |
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11 #if (TARGET == 1) |
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12 #include "../../riviera/rv/rv_defined_swe.h" |
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13 #endif |
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14 |
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15 /****************************************************************************** |
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16 * Compile option switches |
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17 ******************************************************************************/ |
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18 |
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19 // FFS compiled with extra test functionality |
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20 #define FFS_TEST 1 |
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21 |
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22 // Default max number of simultaneous open files |
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23 #ifdef RVM_MSFE_SWE |
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24 #define FFS_FD_MAX 20 |
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25 #else |
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26 #define FFS_FD_MAX 4 |
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27 #endif |
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28 |
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29 #define FFS_RECLAIM_NEW 1 |
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30 |
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31 /****************************************************************************** |
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32 * Compile constants |
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33 ******************************************************************************/ |
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34 |
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35 // FFS API version (in four-digit BCD format) |
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36 #define FFS_API_VERSION ((uint16) 0x0642) |
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37 |
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38 // FFS_DRV_VERSION is in drv.h |
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39 |
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40 // TMFFS protocol version is in tmffs.h |
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41 |
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42 // Magic for determining (formatted) file system version. First two digits |
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43 // represent major version, bottom two digits represent minor version. An |
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44 // ffs code compiled for one major version X is compatible with any other |
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45 // format version with major = X. Minor version is incremented when adding |
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46 // new features that does not break compatibility. |
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47 #define FFS_FORMAT_VERSION (0x0210) |
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48 #define BLOCK_MAGIC_LOW ('f'<<8|'F') // "Ffs#" |
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49 #define BLOCK_MAGIC_HIGH ('#'<<8|'s') |
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50 #define BLOCK_MAGIC ((BLOCK_MAGIC_HIGH << 8)|(BLOCK_MAGIC_LOW)) |
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51 |
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52 // Absolute maximum number of inodes allowed |
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53 #define FFS_INODES_MAX 2048 |
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54 |
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55 // Default maximum number of inodes allowed |
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56 #define FFS_INODES_MAX_DEFAULT 1024 |
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57 |
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58 // Default number of path components (limit due to recursiveness of |
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59 // inodes_reclaim()) |
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60 #define FFS_PATH_DEPTH_MAX 6 |
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61 |
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62 // Maximum number of blocks (flash sectors) in a ffs system. FFS_BLOCKS_MAX |
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63 // must be >= the number of blocks in the largest flash device memory |
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64 // map. It is used to allocate the number of entries in the static bstat |
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65 // array. |
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66 #define FFS_BLOCKS_MAX 128 |
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67 // Default size of journal file (represented as 256'ths of the blocksize) |
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68 #define FFS_JOURNAL_SIZE_IN256THS 16 // one 16'ths of the block size. |
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69 |
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70 // Without the min size will the maximum of files (fs.blocks_files_max) in |
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71 // one block be 32 files if the blocksize is 8kB! |
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72 #define FFS_JOURNAL_SIZE_MIN 1024 |
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73 |
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74 #define FFS_JOURNAL_NAME ".journal" |
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75 |
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76 // Default max size of file name (excluding null terminator) |
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77 #define FFS_FILENAME_MAX 20 |
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78 |
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79 // Maximum distance in age between youngest and oldest blocks |
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80 #define FFS_DAGE_MAX 256 |
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81 #define FFS_DAGE_GAIN_MIN (FFS_DAGE_MAX / 4) |
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82 #define FFS_DAGE_EARLY_WIDTH 64 |
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83 |
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84 // Offset on file descriptors |
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85 #define FFS_FD_OFFSET '1' |
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86 |
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87 // Macros to set flags and test bits in flash memory words (negative logic) |
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88 #define BIT_SET(value, bits) ((value) & (~bits)) |
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89 #define IS_BIT_SET(value, bits) (~(value) & (bits)) |
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90 |
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91 // Number of free inodes and journal entries to keep for "emergencies" |
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92 #define FFS_INODES_MARGIN 4 |
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93 #define FFS_JOURNAL_MARGIN 4 |
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94 |
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95 |
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96 /****************************************************************************** |
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97 * Macros used in both drv.c and core.c |
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98 ******************************************************************************/ |
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99 |
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100 // Convert a offset_t value to a block index |
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101 #define offset2block(offset) (((uint32) offset) >> dev.binfo[0].size_ld) |
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102 |
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103 // Convert between offset and address |
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104 #define offset2addr(offset) (dev.base + (offset)) |
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105 |
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106 // Size of a block |
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107 #define blocksize(block) (1 << dev.binfo[block].size_ld) |
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108 |
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109 // Test if flag is set |
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110 #define is_open_option(options, flags) ((options & flags) == flags) |
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111 |
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112 // Amount of reserved space. |
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113 #define RESERVED_LOW 2 * fs.journal_size |
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114 #define RESERVED_NONE 0 |
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115 |
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116 // We have to saturate because a recently reclaimed inodes block could |
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117 // theoretically possess a high age |
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118 #define saturate_dage(dage) (dage > (2*FFS_DAGE_MAX) ? (2*FFS_DAGE_MAX) : dage) |
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119 |
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120 |
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121 /****************************************************************************** |
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122 * Block Types |
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123 ******************************************************************************/ |
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124 |
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125 // Block age, ie. number of times block has been erased |
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126 typedef uint16 age_t; |
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127 |
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128 // Maximum age a block can have |
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129 #define BLOCK_AGE_MAX 0xFFFF |
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130 |
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131 // ffs block status flags. These are stored in the first 2 bytes of |
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132 // the ffs block in the flash sector. |
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133 enum BLOCK_FLAGS { |
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134 BF_LOST = 0x80, // block is lost and will soon be erased |
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135 BF_FREE = 0x40, // free (preformatted and with block magic) |
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136 BF_DATA = 0x02, // data |
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137 BF_CLEANING = 0x01, // block is being cleaned |
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138 BF_INODES = 0x10, // block contains inodes |
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139 BF_COPYING = 0x04 // block is a coming inodes block |
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140 }; |
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141 enum BLOCK_STATES { |
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142 BF_IS_EMPTY = ~(0), |
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143 BF_IS_FREE = ~(BF_FREE), |
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144 BF_IS_DATA = ~(BF_FREE | BF_DATA), |
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145 BF_IS_CLEANING = ~(BF_FREE | BF_DATA | BF_CLEANING), |
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146 BF_IS_COPYING = ~(BF_FREE | BF_COPYING), |
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147 BF_IS_INODES = ~(BF_FREE | BF_COPYING | BF_INODES), |
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148 BF_IS_INODES_LOST = ~(BF_FREE | BF_COPYING | BF_INODES | BF_LOST) |
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149 }; |
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150 |
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151 // Header of each FFS block |
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152 struct block_header_s { |
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153 uint16 magic_low; // 32-bit magic number |
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154 uint16 magic_high; |
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155 uint16 version; // FFS_FORMAT_VERSION used for formatting |
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156 age_t age; // number of times this block has been erased |
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157 uint16 flags; // status flags of this block (BLOCK_FLAGS) |
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158 uint16 reserved0; |
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159 uint16 reserved1; |
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160 uint16 reserved2; |
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161 }; |
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162 |
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163 // Important the below define MUST fit to the size of the header that is written |
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164 #define BHEADER_SIZE sizeof(struct block_header_s) |
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165 |
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166 #define OLD_BLOCK_MAGIC_LOW ('S'<<8|'F') // "FS" |
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167 #define OLD_FFS_FORMAT_VERSION (0x0100) // 1.00 (in four-digit BCD format) |
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168 |
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169 // Old header of each FFS block. From old/previous FFS format version |
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170 struct block_header_old_s { |
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171 uint8 flags; |
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172 uint8 copied; |
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173 uint8 magicflags; |
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174 uint8 reserved0; |
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175 uint16 magic_low; |
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176 uint16 magic_high; |
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177 uint16 reserved1; |
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178 uint16 reserved2; |
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179 }; |
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180 |
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181 // Block status. This struct holds the status of one ffs block This relation |
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182 // is always valid: <block size> = <used> + <lost> + <free>. The block size |
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183 // is obtained from the corresponding block_info structure. <used> and |
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184 // <lost> variables always holds a value which is a multiple of |
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185 // FFS_GRANULARITY. For inodes, <used> is number of inodes in active use, |
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186 // <lost> is number of deleted/lost inodes, <numfiles> is the index of the |
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187 // first free inode. |
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188 struct block_stat_s { |
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189 blocksize_t used; // number of used bytes |
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190 blocksize_t lost; // number of lost bytes |
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191 uint16 flags; // flash block flags (first 16 bits of each block) |
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192 uint16 objects; // number of valid objects |
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193 }; |
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194 |
211
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195 /****************************************************************************** |
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196 * External declarations |
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197 ******************************************************************************/ |
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198 |
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199 extern struct fs_s fs; |
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200 extern struct block_stat_s bstat[FFS_BLOCKS_MAX]; |
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201 |
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202 extern struct ffs_stats_s stats; |
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203 |
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204 extern const struct block_info_s *binfo; |
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205 |
209
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206 |
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207 /****************************************************************************** |
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208 * Object Types |
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209 ******************************************************************************/ |
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210 |
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211 // This enum MUST be in sync with the one in ffs.h. |
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212 enum OBJECT_TYPE_E { |
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213 // remaining filetypes are in ffs.h |
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214 OT_ERASED = 0, |
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215 OT_NULL = 7, |
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216 OT_MASK = 7, |
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217 OT_MAX = 4 |
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218 }; |
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219 |
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220 // This enum MUST be in sync with the one in ffs.h. |
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221 enum OBJECT_FLAGS_E { |
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222 // remaining object flags are in ffs.h |
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223 OF_UNDEF0 = 1<<5, |
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224 OF_UNDEF1 = 1<<6, |
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225 OF_EXACT = 1<<7, // used by control()/update_commit() interaction. This |
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226 // is *not* an object flag! |
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227 OF_ALL = OF_READONLY, // all flags allowed to be changed by user |
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228 OF_MASK = 0xF0 |
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229 }; |
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230 |
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231 struct inode_s { |
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232 uint16 size; |
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233 uint8 reserved; // size extension? |
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234 objflags_t flags; |
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235 iref_t child; // link to first inode in dir (this inode is a dir) |
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236 iref_t sibling; // link to next inode in same directory |
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237 location_t location; // location of object |
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238 uint16 sequence; // |
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239 uint16 updates; // times this object has been updated |
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240 }; |
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241 |
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242 struct file_descriptor_s { |
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243 char *buf; // Write buffer |
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244 iref_t seghead; // First chunk. Contain file name and optional data |
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245 iref_t wch; // Inode of work chunk (if chunk is read to buf) |
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246 int fp; // File pointer |
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247 int wfp; // Work file pointer always points to start of wch |
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248 int size; // Size of object (all chunks and data from buf) |
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249 int8 options; // Open options |
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250 int dirty; // Indicate if buf contain valid data or not |
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251 }; |
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252 |
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253 |
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254 /****************************************************************************** |
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255 * Journal types and global fs structure |
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256 ******************************************************************************/ |
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257 |
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258 enum JOURNAL_FLAGS { |
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259 JOURNAL_WRITING = 0x02, // journal is being written to journal file |
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260 JOURNAL_READY = 0x04, // journal has been written to journal file |
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261 JOURNAL_DONE = 0x08 // journal has been written to ffs |
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262 }; |
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263 |
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264 enum JOURNAL_STATES { |
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265 JOURNAL_IS_EMPTY = ~(0), |
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266 JOURNAL_IS_WRITING = ~(JOURNAL_WRITING), |
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267 JOURNAL_IS_READY = ~(JOURNAL_WRITING | JOURNAL_READY), |
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268 JOURNAL_IS_DONE = ~(JOURNAL_WRITING | JOURNAL_READY | JOURNAL_DONE) |
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269 }; |
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270 |
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271 // Journal entry structure. Note that the state byte *MUST* be the first |
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272 // byte of the structure! |
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273 struct journal_s { |
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274 uint8 state; // state of journal entry. |
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275 objflags_t flags; // type of object |
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276 iref_t i; // iref of object |
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277 iref_t diri; // iref of object that is this object's parent/sibling |
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278 iref_t oldi; // iref of object being replaced (only for updates) |
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279 location_t location; // object's location |
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280 uint16 size; // object's size |
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281 iref_t repli; // inode which is replaced |
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282 }; |
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283 |
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284 // Main ffs info struct (initialised by ffs_initialize()) |
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285 struct fs_s { |
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286 struct inode_s *inodes_addr; // base address of inodes |
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287 iref_t root; // iref of root directory |
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288 bref_t inodes; // index into bstat containing inode block |
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289 bref_t newinodes; // index into bstat containing new inode block |
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290 bref_t blocks_free_min; // Number of spare blocks (0 or 1) |
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291 int filesize_max; // Max size of object data |
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292 int reserved_space; // Byte size of space reserved for journal relocation |
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293 iref_t inodes_max; // Max number of inodes possible |
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294 iref_t inodes_high; // number of inodes triggering an inodes_reclaim() |
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295 iref_t objects_max; // Max number of objects (valid inodes) allowed |
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296 age_t age_max; // Max block age found by blocks_fsck() |
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297 iref_t block_files_max; // max number of files in a block |
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298 iref_t block_files_reserved; // Reserved for journals |
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299 uint16 format; // FFS version as formatted in flash blocks |
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300 uint16 sequence; // Object sequence number (for debug only) |
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301 effs_t initerror; // ffs_initialize() return code |
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302 uint8 lost_threshold; // Threshold percentage for data block reclaim |
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303 uint8 flags; // Global FFS options/flags |
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304 uint8 filename_max; // Max length of a filename |
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305 uint8 path_depth_max; // Max path componenents allowed |
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306 uint8 numfds; // Mumber of available file descriptors |
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307 uint8 testflags; |
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308 int8 journal_depth; // Current journal nesting depth (0 or 1) |
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309 iref_t ijournal; // iref of journal file |
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310 uint32 journal_size; // Byte size of journal file |
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311 uint32 journal_pos; // Byte offset to first free entry in journal file |
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312 struct journal_s journal; |
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313 uint8 fd_max; // number of max available file descriptors |
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314 int fd_buf_size; // size of stream buffer |
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315 struct file_descriptor_s fd[FFS_FD_MAX]; |
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316 struct journal_s ojournal; // "Old" journal |
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317 int link_child; // Link child in journal or not |
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318 iref_t i_backup; // Used by ffs_file_write() |
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319 int chunk_size_max; // Max size of one chunk |
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320 int chunk_size_min; // Min size of one chunk |
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321 uint32 debug[4]; |
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322 }; |
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323 |
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324 // This is the layout of the FFS performance statistics file. The file is |
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325 // created with the name ".statistics" in the root directory at format. It |
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326 // is updated after each data and inodes reclaim (after writing the file |
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327 // that provoked the reclaim). The file is only updated if it exists, so if |
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328 // the user does not want the file, she can erase it after the initial |
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329 // format. FIXME: The use of the .statistics file is not yet implemented |
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330 struct ffs_stats_s { |
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331 uint32 data_allocated; // implemented |
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332 |
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333 struct { // Not yet implemented |
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334 uint32 created; |
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335 uint32 updated; |
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336 uint32 read; |
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337 } files; |
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338 struct { // Not yet implemented |
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339 uint32 written[2]; |
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340 uint32 read[2]; |
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341 } bytes; |
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342 struct { |
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343 uint32 most_lost; // Block candidate |
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344 uint32 most_unused; // Block candidate |
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345 uint32 youngest; // Block candidate |
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346 uint32 valid[2]; // Amount of valid reclaimed data |
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347 uint32 lost[2]; // Amount of lost reclaimed data |
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348 } drec; |
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349 struct { |
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350 uint32 num; // Number of inode reclaims |
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351 uint32 valid; // Number of valid reclaimed inodes |
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352 uint32 lost; // Number of lost reclaimed inodes |
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353 } irec; |
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354 }; |
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355 extern struct ffs_stats_s stats; |
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356 |
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357 |
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358 /****************************************************************************** |
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359 * Miscellaneous types |
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360 ******************************************************************************/ |
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361 |
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362 // only used with (FFS_TEST == 1) |
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363 enum TEST_RECOVERY { |
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364 JOURNAL_TEST_BASE = 0x10, |
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365 JOURNAL_TEST_EMPTY, |
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366 JOURNAL_TEST_WRITING, |
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367 JOURNAL_TEST_READY, |
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368 JOURNAL_TEST_COMMITTING, |
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369 JOURNAL_TEST_COMMITTED, |
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370 JOURNAL_TEST_DONE, |
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371 BLOCK_COMMIT_BASE = 0x20, |
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372 BLOCK_COMMIT_BEFORE, |
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373 BLOCK_COMMIT_NO_VALID, |
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374 BLOCK_COMMIT_OLD_FREE, |
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375 BLOCK_COMMIT_AFTER, |
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376 BLOCK_RECLAIM_BASE = 0x40, |
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377 BLOCK_RECLAIM_ALLOC, |
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378 BLOCK_RECLAIM_CLEANING, |
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379 BLOCK_RECLAIM_NO_CLEAN, |
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380 BLOCK_RECOVER_OBJECTS |
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381 }; |
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382 |
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383 enum FLASH_DATA { |
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384 FLASH_NULL8 = 0xFF, |
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385 FLASH_NULL16 = 0xFFFF, |
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386 FLASH_NULL32 = 0xFFFFFFFFL, |
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387 IREF_NULL = FLASH_NULL16 |
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388 }; |
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389 |
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390 |
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391 // This enum MUST be in sync with the one in ffs.h. |
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392 enum OBJECT_CONTROL { |
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393 // remaining object control codes are in ffs.h |
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394 OC_FS_FLAGS = 80, |
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395 OC_TRACE_INIT = 82, |
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396 OC_DEV_MANUFACT = 88, |
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397 OC_DEV_DEVICE = 89, |
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398 |
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399 OC_DEBUG_FIRST = 120, |
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400 OC_DEBUG_0 = 120, |
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401 OC_DEBUG_1 = 121, |
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402 OC_DEBUG_2 = 122, |
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403 OC_DEBUG_3 = 123, |
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404 OC_DEBUG_LAST = 123, |
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405 |
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406 OC_FS_TESTFLAGS = 127 |
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407 }; |
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408 |
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409 enum FS_FLAGS { |
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410 FS_DIR_DATA = 0x01 // allow directory objects to contain data. |
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411 }; |
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412 |
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413 enum RECLAIM_CANDIDATE { |
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414 MOST_LOST, |
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415 MOST_UNUSED, |
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416 YOUNGEST |
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417 }; |
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418 |
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419 /****************************************************************************** |
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420 * Macros |
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421 ******************************************************************************/ |
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422 |
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423 // Convert between location and offset |
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424 #define location2offset(location) ((location) << dev.atomlog2) |
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425 #define offset2location(offset) (((uint32) offset) >> dev.atomlog2) |
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426 |
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427 // test if object is of a specific type |
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428 #define is_object(objp, type) (((objp)->flags & OT_MASK) == (type)) |
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429 |
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430 // test if object is valid (directory, file or symlink) |
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431 #define is_object_valid(ip) ((ip->flags & OT_MASK) <= OT_MAX && (ip->flags & OT_MASK) != OT_ERASED) |
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432 |
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433 // test if block is in a specific state |
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434 #define is_block(block, state) (bstat[block].flags == (uint16) (state)) |
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435 |
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436 // test if block has certain flags set |
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437 #define is_block_flag(block, bits) (IS_BIT_SET(bstat[block].flags, (bits))) |
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438 |
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439 // convert an object's data address to the address of the object's name |
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440 #define addr2name(addr) (addr) |
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441 |
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442 // Convert a size to an aligned size |
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443 #define atomalign(size) (((size) + dev.atomsize-1) & ~dev.atomnotmask) |
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444 #define wordalign(size) (((size) + 3) & ~3) |
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445 #define halfwordalign(size) (((size) + 1) & ~1) |
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446 |
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447 #define inode_addr(i) (fs.inodes_addr + i) |
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448 |
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449 #define JOURNAL_POS_INITIAL (wordalign(2 + sizeof(FFS_JOURNAL_NAME) + 1)) |
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450 |
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451 |
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452 /****************************************************************************** |
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453 * Function prototypes |
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454 ******************************************************************************/ |
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455 |
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456 // Helper functions |
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457 |
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458 effs_t is_filename(const char *s); |
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459 int ffs_strlen(const char *s); |
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460 int ffs_strcmp(const char *s, const char *p); |
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461 char *addr2data(const char *addr, const struct inode_s *ip); |
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462 |
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463 int object_datasize(iref_t i); |
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464 iref_t is_readonly(iref_t i, const char *name); |
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465 iref_t dir_traverse(iref_t i, iref_t *entries); |
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466 |
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467 bref_t block_alloc(bref_t n, uint16 flags); |
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468 bref_t block_alloc_try(bref_t *n); |
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469 void block_flags_write(uint8 block, uint8 flags); |
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470 |
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471 offset_t data_alloc(int size); |
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472 offset_t data_alloc_try(int size); |
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473 offset_t data_reserved_alloc(int size); |
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474 |
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475 iref_t inode_alloc(void); |
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476 |
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477 effs_t is_fd_valid(fd_t fdi); |
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478 effs_t is_offset_in_buf(int offset, fd_t fdi); |
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479 |
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480 iref_t chunk_alloc(int realsize, int is_journal, offset_t *offset); |
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481 |
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482 iref_t inode_alloc_try(void); |
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483 fd_t get_fdi(iref_t i); |
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484 |
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485 offset_t data_prealloc(int realsize); |
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486 |
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487 // Functions used by API |
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488 |
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489 effs_t object_update(iref_t oldi); |
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490 iref_t object_create(const char *name, const char *buf, int size, |
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491 iref_t dir); |
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492 int file_read(const char *name, void *addr, int size); |
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493 int stream_read(fd_t fdi, void *src, int size); |
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494 int object_read(const char *name, char *buf, int size, int linkflag); |
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495 |
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496 iref_t object_stat(const char *name, struct xstat_s *stat, |
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497 int linkflag, int fdi, int extended); |
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498 effs_t object_remove(iref_t i); |
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499 iref_t object_rename(iref_t oldi, const char *newname, iref_t newdir); |
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500 effs_t object_control(iref_t i, int8 action, int value); |
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501 int object_truncate(const char *pathname, fd_t fdi, offset_t length); |
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502 iref_t object_lookup(const char *path, char **leaf, iref_t *dir); |
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503 iref_t object_lookup_once(const char *path, char **leaf, iref_t *dir); |
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504 iref_t dir_open(const char *name); |
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505 iref_t dir_next (iref_t dir, iref_t i, char *name, int8 size); |
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506 |
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507 |
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508 // Journalling |
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509 |
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510 void journal_begin(iref_t oldi); |
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511 void journal_end(uint8 type); |
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512 void journal_commit(uint8 type); |
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513 int journal_push(void); |
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514 int journal_pop(void); |
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515 iref_t journal_create(iref_t oldi); |
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516 effs_t journal_init(iref_t i); |
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517 |
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518 |
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519 // Format, Init and Reclaim |
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520 |
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521 void block_preformat(bref_t b, age_t age); |
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522 effs_t fs_preformat(void); |
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523 effs_t is_formattable(int8 flag); |
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524 effs_t fs_format(const char *fsname_and_options); |
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525 |
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526 effs_t ffs_initialize(void); |
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527 void fs_params_init(const char *p); |
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528 blocksize_t block_used(bref_t b); |
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529 |
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530 effs_t ffs_begin(void); |
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531 int ffs_end(int error); |
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532 |
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533 int block_reclaim(bref_t b); |
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534 int blocks_reclaim(void); |
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535 void block_commit(void); |
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536 |
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537 iref_t data_reclaim(int space); |
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538 int data_reclaim_try(int space); |
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539 iref_t data_block_reclaim(bref_t b, int reclaim_candidate); |
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540 iref_t object_relocate(iref_t oldi); |
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541 iref_t block_clean(bref_t b); |
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|
542 |
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543 void block_free(bref_t block); |
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544 |
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545 void inodes_set(iref_t i); |
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546 effs_t inodes_reclaim(void); |
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547 |
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548 int reclaim(void); |
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|
549 |
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550 // Internally used functions |
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551 |
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552 effs_t file_read_int(const char *path, void *src, int size); |
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553 effs_t file_update(const char *path, void *src, int size); |
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554 |
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555 int statistics_file_create(void); |
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556 int statistics_write(void); |
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557 void statistics_init(void); |
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558 void statistics_update_drec(int valid, int lost, int candidate); |
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559 void statistics_update_irec(int valid, int lost); |
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560 |
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561 // Chunk Operations |
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562 iref_t segment_create(const char *buf, int size, iref_t dir); |
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563 int segment_datasize(const struct inode_s *ip); |
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564 int segment_read(iref_t i, char *buf, int size, int offset); |
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565 iref_t segment_next(iref_t i); |
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566 iref_t segment_traverse(iref_t i, iref_t *entries); |
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567 int segfile_seek(iref_t in_i, int in_pos, |
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568 iref_t *out_i, int *out_pos_i); |
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569 iref_t chunk_traverse(iref_t i); |
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570 effs_t datasync(fd_t fdi); |
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571 // debug/test functions |
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572 |
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573 void tr_bstat(void); |
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574 void tr_fd(fd_t fdi); |
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575 |
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576 // These prototypes really belong in ffs.h but as they have not been |
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577 // implemented, we will not show these prototypes to application |
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578 // programmers. |
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579 effs_t fcntl(fd_t fd, int8 action, uint32 *param); |