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annotate packages/fs/ram/current/src/ramfs.c @ 3292:7f8e529b4d82 default tip

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Fix FREESCALE_EDMA_NBYTES_MLOFFYES_MLOFF() so it works with negative offsets.
author vae
date Wed, 29 Apr 2015 23:31:48 +0000
parents bce3ef5fd9ab
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 //==========================================================================
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2 //
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3 // ramfs.c
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4 //
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5 // RAM file system
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6 //
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7 //==========================================================================
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8 // ####ECOSGPLCOPYRIGHTBEGIN####
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9 // -------------------------------------------
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10 // This file is part of eCos, the Embedded Configurable Operating System.
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11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
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12 //
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13 // eCos is free software; you can redistribute it and/or modify it under
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14 // the terms of the GNU General Public License as published by the Free
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15 // Software Foundation; either version 2 or (at your option) any later
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16 // version.
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17 //
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18 // eCos is distributed in the hope that it will be useful, but WITHOUT
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19 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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20 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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21 // for more details.
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22 //
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23 // You should have received a copy of the GNU General Public License
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24 // along with eCos; if not, write to the Free Software Foundation, Inc.,
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25 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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26 //
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27 // As a special exception, if other files instantiate templates or use
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28 // macros or inline functions from this file, or you compile this file
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29 // and link it with other works to produce a work based on this file,
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30 // this file does not by itself cause the resulting work to be covered by
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31 // the GNU General Public License. However the source code for this file
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32 // must still be made available in accordance with section (3) of the GNU
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33 // General Public License v2.
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34 //
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35 // This exception does not invalidate any other reasons why a work based
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36 // on this file might be covered by the GNU General Public License.
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37 // -------------------------------------------
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38 // ####ECOSGPLCOPYRIGHTEND####
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39 //==========================================================================
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40 //#####DESCRIPTIONBEGIN####
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41 //
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42 // Author(s): nickg
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43 // Contributors: nickg
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44 // Date: 2000-07-25
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45 // Purpose: RAM file system
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46 // Description: This is a RAM filesystem for eCos. It attempts to
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47 // provide full POSIX-compatible filesystem behaviour
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48 // while at the same time being efficient in terms of
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49 // time and space used.
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50 //
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51 //
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52 //####DESCRIPTIONEND####
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53 //
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54 //==========================================================================
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55 //
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56 // General Description
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57 // ===================
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58 //
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59 // This is an implementation of a RAM filesystem for eCos. Its goal is
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60 // to provide a working example of a filesystem that provides most of
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61 // the required POSIX functionality. And obviously it may also be
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62 // useful in its own right.
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63 //
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64 //
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65 // Nodes
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66 // -----
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67 //
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68 // All files and directories are represented by node objects. Each
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69 // ramfs_node structure contains the following fields:
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70 //
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71 // mode - Node type, file or directory.
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72 // refcnt - Number of references to this node. For files each open counts as
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73 // a reference and for directories a node is referenced when it is made
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74 // current directory, or is opened for reading.
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75 // nlink - Number of links to this node. Each directory entry that references
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76 // this node is a link.
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77 // size - Size of the data in this node in bytes.
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78 // atime - Last time this node was accessed.
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79 // mtime - Last time the data in this node was modified.
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80 // ctime - Last time the status information in this node was changed.
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81 //
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82 // The data storage in a node is controlled by the configuration and
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83 // can take two forms. These will be described later.
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84 //
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85 // Directories
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86 // -----------
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87 //
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88 // A directory is a node whose data is a list of directory entries. To
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89 // simplify management of these, long directory entries are split into
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90 // a chain of fixed size ramfs_dirent structures. These contain the
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91 // following fields:
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92 //
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93 // node - Pointer to node referenced by this entry. This is present in
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94 // every directory entry fragment
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95 // inuse - Set to 1 if this entry is in use, zero if it is free.
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96 // first - Set to 1 if this is the first fragment of a directory entry.
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97 // last - Set to 1 if this is the last fragment of a directory entry.
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98 // namelen - The size of the whole file name.
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99 // fraglen - The number of bytes of the file name that are stored in this
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100 // fragment.
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101 // next - The offset of the next fragment of this directory entry.
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102 // name - The characters of the fragment of the file name stored in this
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103 // entry.
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104 //
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105 // Small file names are stored in a single fragment. Longer names are
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106 // stored in a chain of fragments.
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107 //
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108 // Data Storage
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109 // ------------
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110 //
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111 // Two data storage mechanisms may be configured, the SIMPLE and the
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112 // BLOCKS mechanisms.
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113 //
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114 // SIMPLE Data Storage
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115 // ~~~~~~~~~~~~~~~~~~~
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116 //
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117 // This mechanism simply uses malloc() and free() to allocate the
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118 // memory for both nodes and file data. File data is stored in a
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119 // single malloced vector that is realloced as necessary to acquire
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120 // more space.
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121 //
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122 // The advantage of this approach is that the RAM filesystem only uses
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123 // as much memory as it needs, the rest is available for use by other
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124 // components. It also requires much simpler data structures and code
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125 // in the filesystem to manage. However, if any files get to be a
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126 // significant proportion of the size of the heap, there is the danger
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127 // that fragmentation will prevent any further extension of some
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128 // files, even if there is enough memory in total. It also requires an
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129 // implementation of malloc() to be present. If this needs to be
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130 // present for other components,then this is not a significant
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131 // overhead, but including it just for use by this filesystem
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132 // represents a major addition of code and data structures.
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133 //
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134 //
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135 // BLOCKS Data Storage
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136 // ~~~~~~~~~~~~~~~~~~~
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137 //
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138 // This mechanism divides the memory used for file storage into fixed
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139 // sized blocks. These blocks may either be allocated using
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140 // malloc()/free(), or may be obtained from a array of blocks reserved
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141 // for the purpose. Configuration allows the block size to be
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142 // selected, as well as the allocation mechanism, and in the case of a
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143 // block array, whether it is defined here or by an external
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144 // component.
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145 //
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146 // Data storage in nodes is arranges in three arrays of pointers to
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147 // blocks. The first array points directly to data blocks, the second
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148 // to blocks which themselves contain pointers to data blocks, and the
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149 // third to blocks which contain pointers to blocks which contain
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150 // pointers to data blocks. In the default configuration These last
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151 // two arrays have only one element each.
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152 //
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153 // The following shows how the data is arranged in a fully populated
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154 // file with a 256 byte block size using the default configuration.
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155 //
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156 // Node
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157 // ~ ~
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158 // | |
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159 // | |
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160 // +------------+
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161 // | *------+--------> data block 0
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162 // +------------+
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163 // | *------+--------> data block 1
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164 // +------------+
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165 // | *------+--------> data block 2
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166 // +------------+
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167 // | *------+--------> data block 3
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168 // +------------+
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169 // | *------+--------> data block 4
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170 // +------------+
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171 // | *------+--------> data block 5
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172 // +------------+
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173 // | *------+--------> data block 6
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174 // +------------+
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175 // | *------+--------> data block 7
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176 // +------------+
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177 // | *------+--------> +------------+
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178 // +------------+ | *------+--------> data block 8
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179 // | *------+----+ +------------+
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180 // +------------+ | | |
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181 // | ~ ~
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182 // | | |
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183 // | +------------+
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184 // | | *------+--------> data block 71
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185 // | +------------+
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186 // |
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187 // +---->+------------+ +------------+
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188 // | *------+-------->| *------+---->data block 72
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189 // +------------+ +------------+
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190 // | | | |
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191 // ~ ~ ~ ~
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192 // | | | |
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193 // +------------+ +------------+
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194 // | *------+---+ | *------+----> data block 135
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195 // +------------+ | +------------+
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196 // |
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197 // | +------------+
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198 // +---->| *------+----> data block 4104
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199 // +------------+
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200 // | |
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201 // ~ ~
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202 // | |
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203 // +------------+
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204 // | *------+----> data block 4167
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205 // +------------+
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206 //
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207 //
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208 //
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209 // The advantages of this approach are that, first, memory usage is
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210 // divided into discreet fixed size blocks which are easier to
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211 // manage. When using malloc() to allocate them, they will fit into
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212 // any free memory of at least the right size. Using the block array
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213 // option removes the need to have a malloc() implementation at all.
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214 //
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215 // The disadvantages of this mechanism are that, first, when using
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216 // malloc() to allocate blocks, the per-block memory allocator
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217 // overhead is paid for each block, rather than per file. This may
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218 // result in less memory overall being available for data
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219 // storage. When using the block array, it is permanently reserved for
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220 // use by the ram filesystem, and is not available for use by other
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221 // components.
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222 //
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223 //==========================================================================
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224
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225 #include <pkgconf/system.h>
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226 #include <pkgconf/hal.h>
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227 #include <pkgconf/kernel.h>
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228 #include <pkgconf/io_fileio.h>
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229 #include <pkgconf/fs_ram.h>
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230
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231 #include <cyg/kernel/ktypes.h> // base kernel types
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232 #include <cyg/infra/cyg_trac.h> // tracing macros
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233 #include <cyg/infra/cyg_ass.h> // assertion macros
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234
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235 #include <unistd.h>
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236 #include <sys/types.h>
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237 #include <fcntl.h>
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238 #include <sys/stat.h>
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239 #include <errno.h>
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240 #include <dirent.h>
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241
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242 #include <stdlib.h>
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243 #include <string.h>
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244
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245 #include <cyg/fileio/fileio.h>
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246
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247 #include <cyg/kernel/kapi.h>
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248 #include <cyg/infra/diag.h>
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249
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250 //==========================================================================
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251 // Sizes derived from configuration
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252
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253 // -------------------------------------------------------------------------
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254 // Simple malloc based allocator parameters
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255
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256 #ifdef CYGPKG_FS_RAM_SIMPLE
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257
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258 #define RAMFS_FILESIZE_MAX UINT_MAX
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259
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260 #else
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261
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262 // -------------------------------------------------------------------------
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263 // Block allocator parameters
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264
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265 // The number of nodes per block
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266 #define RAMFS_NODES_PER_BLOCK (CYGNUM_RAMFS_BLOCK_SIZE/sizeof(ramfs_node))
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267
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268 // The number of indirect pointers that can be stored in a single data block
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269 #define RAMFS_INDIRECT_PER_BLOCK (CYGNUM_RAMFS_BLOCK_SIZE/sizeof(ramfs_block *))
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270
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271 // The number of directory entries that can be stored in a single data block
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272 #define RAMFS_DIRENT_PER_BLOCK (CYGNUM_RAMFS_BLOCK_SIZE/sizeof(ramfs_dirent))
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273
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274 // Number of bytes contained in a one level indirect block
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275 #define RAMFS_INDIRECT1_BLOCK_EXTENT (RAMFS_INDIRECT_PER_BLOCK* \
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276 CYGNUM_RAMFS_BLOCK_SIZE)
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277
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278 // number of bytes contained in a two level indirect block
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279 #define RAMFS_INDIRECT2_BLOCK_EXTENT (RAMFS_INDIRECT_PER_BLOCK* \
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280 RAMFS_INDIRECT_PER_BLOCK* \
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281 CYGNUM_RAMFS_BLOCK_SIZE)
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282
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283 // The maximum data offset for data directly accessed from the node
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284 #define RAMFS_DIRECT_MAX (CYGNUM_RAMFS_BLOCKS_DIRECT*CYGNUM_RAMFS_BLOCK_SIZE)
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285
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286 // The maximum data offset for data accessed from the single level indirect blocks
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287 #define RAMFS_INDIRECT1_MAX (RAMFS_DIRECT_MAX+ \
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288 (CYGNUM_RAMFS_BLOCKS_INDIRECT1* \
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289 RAMFS_INDIRECT1_BLOCK_EXTENT))
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290
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291 // The maximum data offset for data accessed from the two level indirect blocks
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292 #define RAMFS_INDIRECT2_MAX (RAMFS_INDIRECT1_MAX+ \
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293 (CYGNUM_RAMFS_BLOCKS_INDIRECT2* \
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294 RAMFS_INDIRECT2_BLOCK_EXTENT))
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295
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296 // The maximum size of a file
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297 #define RAMFS_FILESIZE_MAX RAMFS_INDIRECT2_MAX
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298
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299 #endif
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300
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301 //==========================================================================
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302 // Forward definitions
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303
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304 // Filesystem operations
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305 static int ramfs_mount ( cyg_fstab_entry *fste, cyg_mtab_entry *mte );
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306 static int ramfs_umount ( cyg_mtab_entry *mte );
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307 static int ramfs_open ( cyg_mtab_entry *mte, cyg_dir dir, const char *name,
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308 int mode, cyg_file *fte );
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309 static int ramfs_unlink ( cyg_mtab_entry *mte, cyg_dir dir, const char *name );
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310 static int ramfs_mkdir ( cyg_mtab_entry *mte, cyg_dir dir, const char *name );
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311 static int ramfs_rmdir ( cyg_mtab_entry *mte, cyg_dir dir, const char *name );
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312 static int ramfs_rename ( cyg_mtab_entry *mte, cyg_dir dir1, const char *name1,
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313 cyg_dir dir2, const char *name2 );
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314 static int ramfs_link ( cyg_mtab_entry *mte, cyg_dir dir1, const char *name1,
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315 cyg_dir dir2, const char *name2, int type );
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316 static int ramfs_opendir ( cyg_mtab_entry *mte, cyg_dir dir, const char *name,
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317 cyg_file *fte );
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318 static int ramfs_chdir ( cyg_mtab_entry *mte, cyg_dir dir, const char *name,
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319 cyg_dir *dir_out );
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320 static int ramfs_stat ( cyg_mtab_entry *mte, cyg_dir dir, const char *name,
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321 struct stat *buf);
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322 static int ramfs_getinfo ( cyg_mtab_entry *mte, cyg_dir dir, const char *name,
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323 int key, void *buf, int len );
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324 static int ramfs_setinfo ( cyg_mtab_entry *mte, cyg_dir dir, const char *name,
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325 int key, void *buf, int len );
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326
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327 // File operations
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328 static int ramfs_fo_read (struct CYG_FILE_TAG *fp, struct CYG_UIO_TAG *uio);
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329 static int ramfs_fo_write (struct CYG_FILE_TAG *fp, struct CYG_UIO_TAG *uio);
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330 static int ramfs_fo_lseek (struct CYG_FILE_TAG *fp, off_t *pos, int whence );
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331 static int ramfs_fo_ioctl (struct CYG_FILE_TAG *fp, CYG_ADDRWORD com,
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332 CYG_ADDRWORD data);
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333 static int ramfs_fo_fsync (struct CYG_FILE_TAG *fp, int mode );
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334 static int ramfs_fo_close (struct CYG_FILE_TAG *fp);
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335 static int ramfs_fo_fstat (struct CYG_FILE_TAG *fp, struct stat *buf );
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336 static int ramfs_fo_getinfo (struct CYG_FILE_TAG *fp, int key, void *buf, int len );
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337 static int ramfs_fo_setinfo (struct CYG_FILE_TAG *fp, int key, void *buf, int len );
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338
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339 // Directory operations
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340 static int ramfs_fo_dirread (struct CYG_FILE_TAG *fp, struct CYG_UIO_TAG *uio);
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341 static int ramfs_fo_dirlseek (struct CYG_FILE_TAG *fp, off_t *pos, int whence );
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342
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343
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344 //==========================================================================
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345 // Filesystem table entries
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346
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347 // -------------------------------------------------------------------------
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348 // Fstab entry.
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349 // This defines the entry in the filesystem table.
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350 // For simplicity we use _FILESYSTEM synchronization for all accesses since
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351 // we should never block in any filesystem operations.
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352
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353 FSTAB_ENTRY( ramfs_fste, "ramfs", 0,
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354 CYG_SYNCMODE_FILE_FILESYSTEM|CYG_SYNCMODE_IO_FILESYSTEM,
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355 ramfs_mount,
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356 ramfs_umount,
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357 ramfs_open,
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358 ramfs_unlink,
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359 ramfs_mkdir,
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360 ramfs_rmdir,
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361 ramfs_rename,
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362 ramfs_link,
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363 ramfs_opendir,
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364 ramfs_chdir,
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365 ramfs_stat,
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366 ramfs_getinfo,
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367 ramfs_setinfo);
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368
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369 // -------------------------------------------------------------------------
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370 // File operations.
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371 // This set of file operations are used for normal open files.
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372
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373 static cyg_fileops ramfs_fileops =
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374 {
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375 ramfs_fo_read,
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376 ramfs_fo_write,
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377 ramfs_fo_lseek,
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378 ramfs_fo_ioctl,
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379 cyg_fileio_seltrue,
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380 ramfs_fo_fsync,
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381 ramfs_fo_close,
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382 ramfs_fo_fstat,
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383 ramfs_fo_getinfo,
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384 ramfs_fo_setinfo
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385 };
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386
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387 // -------------------------------------------------------------------------
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388 // Directory file operations.
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389 // This set of operations are used for open directories. Most entries
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390 // point to error-returning stub functions. Only the read, lseek and
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391 // close entries are functional.
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392
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393 static cyg_fileops ramfs_dirops =
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394 {
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395 ramfs_fo_dirread,
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396 (cyg_fileop_write *)cyg_fileio_enosys,
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397 ramfs_fo_dirlseek,
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398 (cyg_fileop_ioctl *)cyg_fileio_enosys,
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399 cyg_fileio_seltrue,
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400 (cyg_fileop_fsync *)cyg_fileio_enosys,
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401 ramfs_fo_close,
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402 (cyg_fileop_fstat *)cyg_fileio_enosys,
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403 (cyg_fileop_getinfo *)cyg_fileio_enosys,
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404 (cyg_fileop_setinfo *)cyg_fileio_enosys
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405 };
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406
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407 //==========================================================================
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408 // Data typedefs
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409 // Some forward typedefs for the main data structures.
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410
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411 struct ramfs_node;
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412 typedef struct ramfs_node ramfs_node;
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413
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414 struct ramfs_dirent;
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415 typedef struct ramfs_dirent ramfs_dirent;
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416
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417 #ifndef CYGPKG_FS_RAM_SIMPLE
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418
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419 typedef cyg_uint8 ramfs_block[CYGNUM_RAMFS_BLOCK_SIZE];
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420
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421 #endif
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422
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423 //==========================================================================
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424 // File and directory node
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425 // This data structure represents a file or directory.
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426
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427 struct ramfs_node
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428 {
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429 mode_t mode; // node type
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430 cyg_ucount32 refcnt; // open file/current dir references
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431 nlink_t nlink; // number of links to this node
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432 size_t size; // size of file in bytes
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433 time_t atime; // last access time
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434 time_t mtime; // last modified time
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435 time_t ctime; // last changed status time
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436
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437 #ifdef CYGPKG_FS_RAM_SIMPLE
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438
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439 // The data storage in this case consists of a single
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440 // malloced memory block, together with its size.
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441
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442 size_t datasize; // size of data block
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443 cyg_uint8 *data; // malloced data buffer
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444
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445 #else
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446
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447 // The data storage in this case consists of arrays of pointers
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448 // to data blocks.
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449
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450 #if CYGNUM_RAMFS_BLOCKS_DIRECT > 0
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451 // Directly accessible blocks from the inode.
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452 ramfs_block *direct[CYGNUM_RAMFS_BLOCKS_DIRECT];
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453 #endif
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454 #if CYGNUM_RAMFS_BLOCKS_INDIRECT1 > 0
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455 // Single level indirection
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456 ramfs_block **indirect1[CYGNUM_RAMFS_BLOCKS_INDIRECT1];
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457 #endif
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458 #if CYGNUM_RAMFS_BLOCKS_INDIRECT2 > 0
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459 // Two level indirection
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460 ramfs_block ***indirect2[CYGNUM_RAMFS_BLOCKS_INDIRECT2];
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461 #endif
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462
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463 #endif
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464
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465 };
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466
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467 //==========================================================================
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468 // Directory entry.
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469 // Fixed sized entry containing a fragment of the name of a file/directory.
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470
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471 struct ramfs_dirent
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472 {
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473 ramfs_node *node; // pointer to node
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474 unsigned int inuse:1, // entry in use?
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475 first:1, // first directory entry fragment?
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476 last:1, // last directory entry fragment?
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477 namelen:8, // bytes in whole name
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478 fraglen:8; // bytes in name fragment
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479 off_t next; // offset of next dirent
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480
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481 // Name fragment, fills rest of entry.
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482 char name[CYGNUM_RAMFS_DIRENT_SIZE-
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483 sizeof(ramfs_node *)-
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484 sizeof( cyg_uint32)-
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485 sizeof(off_t)];
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486 };
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487
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488 //==========================================================================
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489 // Directory search data
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490 // Parameters for a directory search. The fields of this structure are
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491 // updated as we follow a pathname through the directory tree.
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492
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493 struct ramfs_dirsearch
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494 {
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495 ramfs_node *dir; // directory to search
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496 const char *path; // path to follow
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497 ramfs_node *node; // Node found
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498 const char *name; // last name fragment used
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499 int namelen; // name fragment length
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500 cyg_bool last; // last name in path?
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501 };
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502
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503 typedef struct ramfs_dirsearch ramfs_dirsearch;
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504
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505 //==========================================================================
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506 // Forward defs
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507
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508 static int del_direntry( ramfs_node *dir, const char *name, int namelen );
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509
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510
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511 //==========================================================================
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512 // Block array
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513 // This is used for block allocation when malloc is not being used.
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514
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515 #ifdef CYGPKG_FS_RAM_BLOCKS_ARRAY
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516
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517 # ifdef CYGPKG_FS_RAM_BLOCKS_ARRAY_EXTERN
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518
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519 // Array is defined externally with a user-supplied name
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520
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521 __externC ramfs_block CYGPKG_FS_RAM_BLOCKS_ARRAY_NAME[CYGNUM_FS_RAM_BLOCKS_ARRAY_SIZE];
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522
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523 // Translate into a usable common name
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524 #define ramfs_block_array CYGPKG_FS_RAM_BLOCKS_ARRAY_NAME
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525
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526 # else
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527
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528 // Array is defined here
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529
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530 static ramfs_block cyg_ramfs_block_array[CYGNUM_FS_RAM_BLOCKS_ARRAY_SIZE];
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531
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532 #define ramfs_block_array cyg_ramfs_block_array
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533
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534 # endif
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535
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536 // Pointer to list of free blocks
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537 static ramfs_block *block_free_list = NULL;
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538
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539 #endif
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540
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541 //==========================================================================
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542 // Block allocation
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543
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544 #ifndef CYGPKG_FS_RAM_SIMPLE
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545
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546 // -------------------------------------------------------------------------
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547 // block_init()
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548 // Initialize the block allocator by chaining them all together on
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549 // block_free_list.
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550
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551 #ifdef CYGPKG_FS_RAM_BLOCKS_ARRAY
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552
1548
92d4feb4957e * src/ramfs.c (block_init): Fixed compiler warning.
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553 static void block_init(void)
115
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554 {
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555 static cyg_bool initialized = false;
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556 int i;
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557
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558 if( !initialized )
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559 {
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560 for( i = 0; i < CYGNUM_FS_RAM_BLOCKS_ARRAY_SIZE; i++ )
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561 {
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562 ramfs_block *b = &ramfs_block_array[i];
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563 *(ramfs_block **)b = block_free_list;
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diff changeset
564 block_free_list = b;
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565 }
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566 initialized = true;
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567 }
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568 }
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diff changeset
569
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570 #endif
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diff changeset
571
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572 // -------------------------------------------------------------------------
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573 // block_alloc()
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574 // Allocate a block for data storage.
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575 // If we have a block array, just pick the first off the free list.
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576 // If we are mallocing, call malloc() to get it.
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577
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578 static ramfs_block *block_alloc(void)
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579 {
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580 ramfs_block *b;
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581
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582 #ifdef CYGPKG_FS_RAM_BLOCKS_ARRAY
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583
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584 block_init(); // Check blocks are initialized
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585
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586 // pick first block off free list.
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587 b = block_free_list;
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588
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589 // and advance list
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590 if( b != NULL )
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591 block_free_list = *(ramfs_block **)b;
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592
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593 #else
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594
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595 b = malloc(CYGNUM_RAMFS_BLOCK_SIZE);
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596
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597 #endif
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598
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599 // Clear the block to zero if it was allocated
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600 if( b != NULL )
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601 memset( b, 0, CYGNUM_RAMFS_BLOCK_SIZE );
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602
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603 return b;
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604
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605 }
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606
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607 // -------------------------------------------------------------------------
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608 // block_free()
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609 // Free a block. Depending on the configuration send it back to the
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diff changeset
610 // heap or put it back on free list.
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611
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612 static void block_free( ramfs_block *b )
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613 {
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614 #ifdef CYGPKG_FS_RAM_BLOCKS_ARRAY
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615
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616 // Put the block back on the free list
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617
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618 *(ramfs_block **)b = block_free_list;
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619 block_free_list = b;
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620
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621 #else
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622
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623 // Call free() to return it to the memory pool
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624
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625 free( b );
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626
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627 #endif
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628 }
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629
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630 #endif
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631
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632 //==========================================================================
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633 // Node buffer management
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634 // There are two versions of this, one for the _SIMPLE variant and one for
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635 // the _BLOCKS variant. In both cases the interface to this code is via the
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636 // findbuffer_node() and freebuffer_node() functions.
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637
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638 #ifdef CYGPKG_FS_RAM_SIMPLE
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639
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640 //==========================================================================
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641 // SIMPLE buffer management.
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diff changeset
642 // Each node has a data buffer pointer and a size. This buffer is
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diff changeset
643 // realloc()ed as needed.
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diff changeset
644
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645 // -------------------------------------------------------------------------
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646 // findbuffer_node()
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diff changeset
647 // return a pointer to the data at the indicated file position, extending
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648 // the buffer if required.
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649
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650 static int findbuffer_node( ramfs_node *node, // node pointer
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651 off_t pos, // data position to get
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652 cyg_uint8 **buffer, // returned buffer pointer
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653 size_t *size, // returned buffer size
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diff changeset
654 cyg_bool alloc) // extend allocation?
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655 {
2078
cfec912002f3 * src/ramfs.c: Implement holes in files when using BLOCK
asl
parents: 1548
diff changeset
656 if( alloc && (pos >= node->datasize || node->datasize == 0) )
115
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657 {
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658 // If we are allowed to alloc new data, and we are at the end of the
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659 // current data allocation, or there is no data present, allocate or
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diff changeset
660 // extend the data buffer.
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661
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662 cyg_uint8 *newdata;
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diff changeset
663
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664 if( node->data == NULL )
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665 newdata = malloc( CYGNUM_RAMFS_REALLOC_INCREMENT );
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666 else
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667 newdata = realloc( node->data, pos+CYGNUM_RAMFS_REALLOC_INCREMENT );
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668
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669 if( newdata == NULL ) return ENOSPC;
2078
cfec912002f3 * src/ramfs.c: Implement holes in files when using BLOCK
asl
parents: 1548
diff changeset
670 else memset( newdata + node->datasize, 0,
cfec912002f3 * src/ramfs.c: Implement holes in files when using BLOCK
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diff changeset
671 pos + CYGNUM_RAMFS_REALLOC_INCREMENT - node->datasize );
115
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672
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673 node->data = newdata;
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674 node->datasize = pos+CYGNUM_RAMFS_REALLOC_INCREMENT;
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675 }
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676 else if( pos > node->datasize )
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677 {
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diff changeset
678 // Indicate end of data.
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diff changeset
679 *size = 0;
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680 return ENOERR;
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681 }
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682
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683 *buffer = node->data+pos;
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684 *size = node->datasize-pos;
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685
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686 return ENOERR;
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687 }
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688
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689 // -------------------------------------------------------------------------
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690 // freebuffer_node()
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691 // Empty out the data storage from the node.
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diff changeset
692
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693 static int freebuffer_node( ramfs_node *node )
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694 {
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695 if( node->data != NULL )
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diff changeset
696 {
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697 free( node->data );
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698 }
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diff changeset
699
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700 node->data = NULL;
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701 node->datasize = 0;
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diff changeset
702
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703 return ENOERR;
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704 }
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705
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706 //==========================================================================
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707
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708 #else
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709
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710 //==========================================================================
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711 // _BLOCKS storage management.
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parents:
diff changeset
712 // Data storage in the node is by means of a set of arrays of pointers to
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
713 // blocks. The first array points directly to the data blocks. Subsequent
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
714 // arrays point to single and double indirect blocks respectively.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
715
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jlarmour
parents:
diff changeset
716 // -------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
717 // findbuffer_direct()
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
718 // Indexes into an array of block pointers and extracts a pointer to the
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
719 // data at offset _pos_, allocating new blocks if required.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
720
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
721 static int findbuffer_direct( off_t pos,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
722 ramfs_block **blocks,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
723 int nblocks,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
724 cyg_uint8 **buffer,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
725 size_t *size,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
726 cyg_bool alloc)
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jlarmour
parents:
diff changeset
727 {
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jlarmour
parents:
diff changeset
728 int bi = pos / CYGNUM_RAMFS_BLOCK_SIZE;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
729 int bpos = pos % CYGNUM_RAMFS_BLOCK_SIZE;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
730 ramfs_block *b;
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jlarmour
parents:
diff changeset
731
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
732 *buffer = NULL;
2078
cfec912002f3 * src/ramfs.c: Implement holes in files when using BLOCK
asl
parents: 1548
diff changeset
733 *size = CYGNUM_RAMFS_BLOCK_SIZE - bpos;
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
734
174
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parents: 115
diff changeset
735 if( bi >= nblocks )
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
736 return ENOERR;
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jlarmour
parents:
diff changeset
737
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
738 b = blocks[bi];
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jlarmour
parents:
diff changeset
739
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
740 if( b == NULL )
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jlarmour
parents:
diff changeset
741 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
742 // There is no block there. If _alloc_ is true we can fill the
2078
cfec912002f3 * src/ramfs.c: Implement holes in files when using BLOCK
asl
parents: 1548
diff changeset
743 // slot in with a new block. If it is false, we indicate there
cfec912002f3 * src/ramfs.c: Implement holes in files when using BLOCK
asl
parents: 1548
diff changeset
744 // is no block and size indicates where the block would end if
cfec912002f3 * src/ramfs.c: Implement holes in files when using BLOCK
asl
parents: 1548
diff changeset
745 // it existed.
115
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jlarmour
parents:
diff changeset
746 if( alloc )
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jlarmour
parents:
diff changeset
747 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
748 b = block_alloc();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
749 if( b == NULL )
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jlarmour
parents:
diff changeset
750 return ENOSPC;
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jlarmour
parents:
diff changeset
751 blocks[bi] = b;
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jlarmour
parents:
diff changeset
752 }
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jlarmour
parents:
diff changeset
753 else return ENOERR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
754 }
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jlarmour
parents:
diff changeset
755
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
756 *buffer = &((*b)[bpos]);
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jlarmour
parents:
diff changeset
757
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jlarmour
parents:
diff changeset
758 return ENOERR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
759 }
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jlarmour
parents:
diff changeset
760
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
761 // -------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
762 // findbuffer_indirect1()
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
763 // Indexes into an array of pointers to blocks containing pointers to
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
764 // blocks and extracts a pointer to the data at offset _pos_,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
765 // allocating new blocks if required.
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jlarmour
parents:
diff changeset
766
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
767 #if CYGNUM_RAMFS_BLOCKS_INDIRECT1 > 0
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
768
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
769 static int findbuffer_indirect1( off_t pos,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
770 ramfs_block ***blocks,
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jlarmour
parents:
diff changeset
771 int nblocks,
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jlarmour
parents:
diff changeset
772 cyg_uint8 **buffer,
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jlarmour
parents:
diff changeset
773 size_t *size,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
774 cyg_bool alloc)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
775 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
776
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
777 int bi = pos / RAMFS_INDIRECT1_BLOCK_EXTENT;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
778 int bpos = pos % RAMFS_INDIRECT1_BLOCK_EXTENT;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
779 int err;
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jlarmour
parents:
diff changeset
780 cyg_uint8 *b;
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jlarmour
parents:
diff changeset
781 size_t sz;
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jlarmour
parents:
diff changeset
782
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
783 // Use findbuffer_direct() to index and allocate
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
784 // the first level indirect block.
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jlarmour
parents:
diff changeset
785
174
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST
jlarmour
parents: 115
diff changeset
786 err = findbuffer_direct( bi*CYGNUM_RAMFS_BLOCK_SIZE,
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
787 (ramfs_block **)blocks,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
788 nblocks,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
789 &b,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
790 &sz,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
791 alloc);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
792
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
793 if( err != ENOERR )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
794 return err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
795
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
796 if( sz == 0 )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
797 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
798 *size = 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
799 return ENOERR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
800 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
801
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
802 // Use findbuffer_direct() on the first level indirect
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
803 // block to allocate and return the data pointer.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
804
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
805 return findbuffer_direct( bpos,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
806 blocks[bi],
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
807 RAMFS_INDIRECT_PER_BLOCK,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
808 buffer,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
809 size,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
810 alloc);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
811 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
812
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
813 #endif
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jlarmour
parents:
diff changeset
814
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
815 // -------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
816 // findbuffer_indirect1()
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
817 // Indexes into an array of pointers to blocks containing pointers to
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
818 // blocks containing pointers to blocks (!) and extracts a pointer to
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
819 // the data at offset _pos_, allocating new blocks if required.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
820
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
821 #if CYGNUM_RAMFS_BLOCKS_INDIRECT2 > 0
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
822
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
823 static int findbuffer_indirect2( off_t pos,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
824 ramfs_block ****blocks,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
825 int nblocks,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
826 cyg_uint8 **buffer,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
827 size_t *size,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
828 cyg_bool alloc)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
829 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
830 int bi = pos / RAMFS_INDIRECT2_BLOCK_EXTENT;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
831 int bpos = pos % RAMFS_INDIRECT2_BLOCK_EXTENT;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
832 int err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
833 cyg_uint8 *b;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
834 size_t sz;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
835
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
836 // Use findbuffer_direct() to index and allocate
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
837 // the first level indirect block.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
838
174
38892b97b685 Merge from eCos master repository on 2001-07-28-00:17:32-BST
jlarmour
parents: 115
diff changeset
839 err = findbuffer_direct( bi*CYGNUM_RAMFS_BLOCK_SIZE,
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
840 (ramfs_block **)blocks,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
841 nblocks,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
842 &b,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
843 &sz,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
844 alloc);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
845
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
846 if( err != ENOERR )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
847 return err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
848
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
849 if( sz == 0 )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
850 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
851 *size = 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
852 return ENOERR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
853 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
854
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
855 // Use findbuffer_indirect1() on the first level indirect block to
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
856 // index and allocate the next level indirect block and the data
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
857 // block.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
858
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
859 return findbuffer_indirect1( bpos,
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jlarmour
parents:
diff changeset
860 blocks[bi],
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jlarmour
parents:
diff changeset
861 RAMFS_INDIRECT_PER_BLOCK,
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jlarmour
parents:
diff changeset
862 buffer,
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jlarmour
parents:
diff changeset
863 size,
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jlarmour
parents:
diff changeset
864 alloc);
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jlarmour
parents:
diff changeset
865 }
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jlarmour
parents:
diff changeset
866
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jlarmour
parents:
diff changeset
867 #endif
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jlarmour
parents:
diff changeset
868
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jlarmour
parents:
diff changeset
869 // -------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
870 // findbuffer_node()
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jlarmour
parents:
diff changeset
871 // Depending on the offset and configuration, call the appropriate
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
872 // function to get the buffer pointer.
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jlarmour
parents:
diff changeset
873
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
874 static int findbuffer_node( ramfs_node *node,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
875 off_t pos,
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jlarmour
parents:
diff changeset
876 cyg_uint8 **buffer,
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jlarmour
parents:
diff changeset
877 size_t *size,
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jlarmour
parents:
diff changeset
878 cyg_bool alloc)
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jlarmour
parents:
diff changeset
879 {
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jlarmour
parents:
diff changeset
880 #if CYGNUM_RAMFS_BLOCKS_DIRECT > 0
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jlarmour
parents:
diff changeset
881 if( pos < RAMFS_DIRECT_MAX )
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jlarmour
parents:
diff changeset
882 return findbuffer_direct( pos,
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jlarmour
parents:
diff changeset
883 node->direct,
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jlarmour
parents:
diff changeset
884 CYGNUM_RAMFS_BLOCKS_DIRECT,
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jlarmour
parents:
diff changeset
885 buffer,
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jlarmour
parents:
diff changeset
886 size,
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jlarmour
parents:
diff changeset
887 alloc);
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jlarmour
parents:
diff changeset
888 #endif
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jlarmour
parents:
diff changeset
889 #if CYGNUM_RAMFS_BLOCKS_INDIRECT1 > 0
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jlarmour
parents:
diff changeset
890 if( pos < RAMFS_INDIRECT1_MAX )
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jlarmour
parents:
diff changeset
891 return findbuffer_indirect1( pos - RAMFS_DIRECT_MAX,
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jlarmour
parents:
diff changeset
892 node->indirect1,
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jlarmour
parents:
diff changeset
893 CYGNUM_RAMFS_BLOCKS_INDIRECT1,
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jlarmour
parents:
diff changeset
894 buffer,
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jlarmour
parents:
diff changeset
895 size,
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jlarmour
parents:
diff changeset
896 alloc);
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jlarmour
parents:
diff changeset
897 #endif
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jlarmour
parents:
diff changeset
898 #if CYGNUM_RAMFS_BLOCKS_INDIRECT2 > 0
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jlarmour
parents:
diff changeset
899 if( pos < RAMFS_INDIRECT2_MAX )
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parents:
diff changeset
900 return findbuffer_indirect2( pos - RAMFS_INDIRECT1_MAX,
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jlarmour
parents:
diff changeset
901 node->indirect2,
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jlarmour
parents:
diff changeset
902 CYGNUM_RAMFS_BLOCKS_INDIRECT2,
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jlarmour
parents:
diff changeset
903 buffer,
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jlarmour
parents:
diff changeset
904 size,
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jlarmour
parents:
diff changeset
905 alloc);
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jlarmour
parents:
diff changeset
906 #endif
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jlarmour
parents:
diff changeset
907
1515
d431485fc764 * src/ramfs.c (findbuffer_node): If pos larger than even INDIRECT2_MAX
jlarmour
parents: 1464
diff changeset
908 return ENOSPC;
115
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jlarmour
parents:
diff changeset
909 }
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jlarmour
parents:
diff changeset
910
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jlarmour
parents:
diff changeset
911 // -------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
912 // freeblock_list()
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jlarmour
parents:
diff changeset
913 // Free a list of data blocks.
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jlarmour
parents:
diff changeset
914
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jlarmour
parents:
diff changeset
915 static void freeblock_list( ramfs_block *blocks[],int nblocks )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
916 {
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jlarmour
parents:
diff changeset
917 int i;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
918 for( i = 0; i < nblocks ; i++ )
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jlarmour
parents:
diff changeset
919 {
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jlarmour
parents:
diff changeset
920 if( blocks[i] != NULL )
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jlarmour
parents:
diff changeset
921 {
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jlarmour
parents:
diff changeset
922 block_free( blocks[i] );
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jlarmour
parents:
diff changeset
923 blocks[i] = NULL;
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jlarmour
parents:
diff changeset
924 }
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jlarmour
parents:
diff changeset
925 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
926 }
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jlarmour
parents:
diff changeset
927
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jlarmour
parents:
diff changeset
928 // -------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
929 // freebuffer_node()
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jlarmour
parents:
diff changeset
930 // Free all the data blocks in the node and clear the pointers.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
931
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jlarmour
parents:
diff changeset
932 static int freebuffer_node( ramfs_node *node )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
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parents:
diff changeset
933 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
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diff changeset
934 #if CYGNUM_RAMFS_BLOCKS_DIRECT > 0
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
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parents:
diff changeset
935 freeblock_list( node->direct, CYGNUM_RAMFS_BLOCKS_DIRECT );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
936 #endif
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jlarmour
parents:
diff changeset
937
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jlarmour
parents:
diff changeset
938 #if CYGNUM_RAMFS_BLOCKS_INDIRECT1 > 0
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
939 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
940 int i;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
941 for( i = 0; i < CYGNUM_RAMFS_BLOCKS_INDIRECT1 ; i++ )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
942 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
943 if( node->indirect1[i] != NULL )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
944 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
945 freeblock_list( (ramfs_block **)node->indirect1[i], RAMFS_INDIRECT_PER_BLOCK );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
946 block_free( (ramfs_block *)node->indirect1[i] );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
947 node->indirect1[i] = NULL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
948 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
949 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
950 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
951 #endif
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jlarmour
parents:
diff changeset
952
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jlarmour
parents:
diff changeset
953 #if CYGNUM_RAMFS_BLOCKS_INDIRECT2 > 0
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
954 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
955 int i;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
956 for( i = 0; i < CYGNUM_RAMFS_BLOCKS_INDIRECT2 ; i++ )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
957 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
958 if( node->indirect2[i] != NULL )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
959 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
960 ramfs_block ***b = node->indirect2[i];
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
961 int j;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
962 for( j = 0; j < RAMFS_INDIRECT_PER_BLOCK ; j++ )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
963 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
964 if( b[j] != NULL )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
965 {
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jlarmour
parents:
diff changeset
966 freeblock_list( (ramfs_block **)b[j], RAMFS_INDIRECT_PER_BLOCK );
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jlarmour
parents:
diff changeset
967 block_free( (ramfs_block *)b[j] );
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jlarmour
parents:
diff changeset
968 b[j] = NULL;
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jlarmour
parents:
diff changeset
969 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
970 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
971 block_free( (ramfs_block *)node->indirect2[i] );
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jlarmour
parents:
diff changeset
972 node->indirect2[i] = NULL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
973 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
974 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
975 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
976 #endif
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jlarmour
parents:
diff changeset
977
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
978 return ENOERR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
979 }
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jlarmour
parents:
diff changeset
980
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
981 //==========================================================================
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jlarmour
parents:
diff changeset
982
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
983 #endif
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jlarmour
parents:
diff changeset
984
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
985 //==========================================================================
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
986 // Node allocation
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
987
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
988 // -------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
989 // alloc_node()
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
990 // Allocate a node and initialize it.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
991 // For the _SIMPLE allocation option, we just malloc it. For the
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
992 // _BLOCKS option we allocate a block and use that. In theory we could
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
993 // pack several nodes into a single block, but we don't at present due
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
994 // to sheer lazyness.
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jlarmour
parents:
diff changeset
995
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
996 static ramfs_node *alloc_node( mode_t mode )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
997 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
998 #ifdef CYGPKG_FS_RAM_SIMPLE
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jlarmour
parents:
diff changeset
999 ramfs_node *node = malloc( sizeof( ramfs_node ) );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1000
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1001 if( node == NULL )
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jlarmour
parents:
diff changeset
1002 return NULL;
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jlarmour
parents:
diff changeset
1003
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1004 #else
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jlarmour
parents:
diff changeset
1005 ramfs_block *b = block_alloc();
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jlarmour
parents:
diff changeset
1006 ramfs_node *node;
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jlarmour
parents:
diff changeset
1007
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jlarmour
parents:
diff changeset
1008 if( b == NULL )
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jlarmour
parents:
diff changeset
1009 return NULL;
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jlarmour
parents:
diff changeset
1010
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jlarmour
parents:
diff changeset
1011 node = (ramfs_node *)b;
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jlarmour
parents:
diff changeset
1012
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jlarmour
parents:
diff changeset
1013 #endif
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jlarmour
parents:
diff changeset
1014
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parents:
diff changeset
1015 memset( node, 0, sizeof(ramfs_node) );
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jlarmour
parents:
diff changeset
1016
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jlarmour
parents:
diff changeset
1017 node->mode = mode;
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jlarmour
parents:
diff changeset
1018 node->refcnt = 0;
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jlarmour
parents:
diff changeset
1019 node->nlink = 0;
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jlarmour
parents:
diff changeset
1020 node->size = 0;
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jlarmour
parents:
diff changeset
1021 node->atime =
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jlarmour
parents:
diff changeset
1022 node->mtime =
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jlarmour
parents:
diff changeset
1023 node->ctime = cyg_timestamp();
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jlarmour
parents:
diff changeset
1024
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jlarmour
parents:
diff changeset
1025 #ifdef CYGPKG_FS_RAM_SIMPLE
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parents:
diff changeset
1026 node->datasize = 0;
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parents:
diff changeset
1027 node->data = NULL;
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jlarmour
parents:
diff changeset
1028 #else
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parents:
diff changeset
1029
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jlarmour
parents:
diff changeset
1030 // The node is already all zero
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jlarmour
parents:
diff changeset
1031
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parents:
diff changeset
1032 #endif
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parents:
diff changeset
1033 return node;
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parents:
diff changeset
1034 }
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parents:
diff changeset
1035
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jlarmour
parents:
diff changeset
1036 // -------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1037 // free_node()
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jlarmour
parents:
diff changeset
1038 // Release a node either back to the free pool or back into the block
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jlarmour
parents:
diff changeset
1039 // pool.
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parents:
diff changeset
1040
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jlarmour
parents:
diff changeset
1041 static void free_node( ramfs_node *node )
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jlarmour
parents:
diff changeset
1042 {
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jlarmour
parents:
diff changeset
1043 #ifdef CYGPKG_FS_RAM_SIMPLE
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parents:
diff changeset
1044
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diff changeset
1045 free( node );
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parents:
diff changeset
1046
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parents:
diff changeset
1047 #else
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parents:
diff changeset
1048
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diff changeset
1049 block_free( (ramfs_block *)node );
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parents:
diff changeset
1050
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diff changeset
1051 #endif
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parents:
diff changeset
1052
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jlarmour
parents:
diff changeset
1053 }
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jlarmour
parents:
diff changeset
1054
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diff changeset
1055
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jlarmour
parents:
diff changeset
1056 //==========================================================================
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jlarmour
parents:
diff changeset
1057 // Ref count and nlink management
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jlarmour
parents:
diff changeset
1058
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jlarmour
parents:
diff changeset
1059 // -------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1060 // dec_refcnt()
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jlarmour
parents:
diff changeset
1061 // Decrment the reference count on a node. If this makes the ref count
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
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parents:
diff changeset
1062 // zero, and the number of links is either zero for a file or one for
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parents:
diff changeset
1063 // a node, then this node is detached from the directory tree and can
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1064 // be freed.
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parents:
diff changeset
1065
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jlarmour
parents:
diff changeset
1066 static int dec_refcnt( ramfs_node *node )
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jlarmour
parents:
diff changeset
1067 {
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jlarmour
parents:
diff changeset
1068 int err = ENOERR;
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jlarmour
parents:
diff changeset
1069 node->refcnt--;
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parents:
diff changeset
1070
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jlarmour
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diff changeset
1071 if( node->refcnt == 0 &&
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diff changeset
1072 ((S_ISREG(node->mode) && node->nlink == 0 ) ||
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
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parents:
diff changeset
1073 (S_ISDIR(node->mode) && node->nlink == 1) )
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jlarmour
parents:
diff changeset
1074 )
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jlarmour
parents:
diff changeset
1075 {
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jlarmour
parents:
diff changeset
1076 // This node it now totally detached from the directory tree,
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jlarmour
parents:
diff changeset
1077 // so delete it.
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jlarmour
parents:
diff changeset
1078
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jlarmour
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diff changeset
1079 if( S_ISDIR(node->mode) )
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jlarmour
parents:
diff changeset
1080 {
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jlarmour
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diff changeset
1081 del_direntry( node, ".", 1 );
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jlarmour
parents:
diff changeset
1082 del_direntry( node, "..", 2 );
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jlarmour
parents:
diff changeset
1083 }
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jlarmour
parents:
diff changeset
1084
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jlarmour
parents:
diff changeset
1085 err = freebuffer_node( node );
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jlarmour
parents:
diff changeset
1086
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jlarmour
parents:
diff changeset
1087 if( err == ENOERR )
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jlarmour
parents:
diff changeset
1088 free_node( node );
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jlarmour
parents:
diff changeset
1089 }
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jlarmour
parents:
diff changeset
1090
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jlarmour
parents:
diff changeset
1091 return err;
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jlarmour
parents:
diff changeset
1092 }
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jlarmour
parents:
diff changeset
1093
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jlarmour
parents:
diff changeset
1094 // -------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1095 // dec_nlink()
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jlarmour
parents:
diff changeset
1096 // Decrement a node's link count. Since this has to do all the same
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1097 // work as dec_refcnt() we implement this using that function by
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1098 // essentially transferring the count to refcnt and then decrement
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1099 // that.
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jlarmour
parents:
diff changeset
1100
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jlarmour
parents:
diff changeset
1101 static int dec_nlink( ramfs_node *node )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1102 {
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jlarmour
parents:
diff changeset
1103 node->refcnt++;
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jlarmour
parents:
diff changeset
1104
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jlarmour
parents:
diff changeset
1105 node->nlink--;
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jlarmour
parents:
diff changeset
1106
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jlarmour
parents:
diff changeset
1107 return dec_refcnt( node );
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jlarmour
parents:
diff changeset
1108 }
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jlarmour
parents:
diff changeset
1109
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1110 //==========================================================================
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jlarmour
parents:
diff changeset
1111 // Directory operations
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jlarmour
parents:
diff changeset
1112
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1113 // -------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1114 // add_direntry()
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jlarmour
parents:
diff changeset
1115 // Add an entry to a directory. This is added as a chain of entry
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1116 // fragments until the name is exhausted.
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jlarmour
parents:
diff changeset
1117
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jlarmour
parents:
diff changeset
1118 static int add_direntry( ramfs_node *dir, // dir to add to
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jlarmour
parents:
diff changeset
1119 const char *name, // name to add
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jlarmour
parents:
diff changeset
1120 int namelen, // length of name
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jlarmour
parents:
diff changeset
1121 ramfs_node *node // node to reference
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jlarmour
parents:
diff changeset
1122 )
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jlarmour
parents:
diff changeset
1123 {
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jlarmour
parents:
diff changeset
1124 off_t pos = 0;
2945
bce3ef5fd9ab * src/ramfs.c (add_direntry): Fix directory file name corruption
sergeig
parents: 2729
diff changeset
1125 #ifdef CYGPKG_FS_RAM_SIMPLE
bce3ef5fd9ab * src/ramfs.c (add_direntry): Fix directory file name corruption
sergeig
parents: 2729
diff changeset
1126 off_t prev_pos = 0;
bce3ef5fd9ab * src/ramfs.c (add_direntry): Fix directory file name corruption
sergeig
parents: 2729
diff changeset
1127 #endif
115
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jlarmour
parents:
diff changeset
1128 ramfs_dirent *d = NULL, *dp = NULL;
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jlarmour
parents:
diff changeset
1129 cyg_bool isfirst = true;
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jlarmour
parents:
diff changeset
1130
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jlarmour
parents:
diff changeset
1131 // Loop inserting fragments of the name into the directory until we
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1132 // have found a home for them all.
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jlarmour
parents:
diff changeset
1133
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jlarmour
parents:
diff changeset
1134 while( namelen > 0 )
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jlarmour
parents:
diff changeset
1135 {
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jlarmour
parents:
diff changeset
1136 int fraglen = namelen;
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jlarmour
parents:
diff changeset
1137
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jlarmour
parents:
diff changeset
1138 if( fraglen > sizeof(d->name) )
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jlarmour
parents:
diff changeset
1139 fraglen = sizeof(d->name);
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jlarmour
parents:
diff changeset
1140
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1141 // Find a free fragment
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1142 for(;;)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1143 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1144 cyg_uint8 *buf;
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jlarmour
parents:
diff changeset
1145 size_t size;
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jlarmour
parents:
diff changeset
1146 int err = findbuffer_node( dir, pos, &buf, &size, true );
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jlarmour
parents:
diff changeset
1147 if( err != ENOERR ) return err;
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jlarmour
parents:
diff changeset
1148
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1149 d = (ramfs_dirent *)buf;
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jlarmour
parents:
diff changeset
1150
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jlarmour
parents:
diff changeset
1151 if( size < sizeof(ramfs_dirent) || d->inuse )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1152 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1153 pos += sizeof(ramfs_dirent);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1154 continue;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1155 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1156
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1157 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1158 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1159
2945
bce3ef5fd9ab * src/ramfs.c (add_direntry): Fix directory file name corruption
sergeig
parents: 2729
diff changeset
1160 #ifdef CYGPKG_FS_RAM_SIMPLE
bce3ef5fd9ab * src/ramfs.c (add_direntry): Fix directory file name corruption
sergeig
parents: 2729
diff changeset
1161 // Tricky! Here we have to look up the previous segment as
bce3ef5fd9ab * src/ramfs.c (add_direntry): Fix directory file name corruption
sergeig
parents: 2729
diff changeset
1162 // reallocating could have moved it.
bce3ef5fd9ab * src/ramfs.c (add_direntry): Fix directory file name corruption
sergeig
parents: 2729
diff changeset
1163 if( !isfirst ) {
bce3ef5fd9ab * src/ramfs.c (add_direntry): Fix directory file name corruption
sergeig
parents: 2729
diff changeset
1164 cyg_uint8 *buf;
bce3ef5fd9ab * src/ramfs.c (add_direntry): Fix directory file name corruption
sergeig
parents: 2729
diff changeset
1165 size_t size;
bce3ef5fd9ab * src/ramfs.c (add_direntry): Fix directory file name corruption
sergeig
parents: 2729
diff changeset
1166 int err;
bce3ef5fd9ab * src/ramfs.c (add_direntry): Fix directory file name corruption
sergeig
parents: 2729
diff changeset
1167 err = findbuffer_node( dir, prev_pos, &buf, &size, false );
bce3ef5fd9ab * src/ramfs.c (add_direntry): Fix directory file name corruption
sergeig
parents: 2729
diff changeset
1168 if( err != ENOERR ) return err;
bce3ef5fd9ab * src/ramfs.c (add_direntry): Fix directory file name corruption
sergeig
parents: 2729
diff changeset
1169
bce3ef5fd9ab * src/ramfs.c (add_direntry): Fix directory file name corruption
sergeig
parents: 2729
diff changeset
1170 dp = (ramfs_dirent *) buf;
bce3ef5fd9ab * src/ramfs.c (add_direntry): Fix directory file name corruption
sergeig
parents: 2729
diff changeset
1171 }
bce3ef5fd9ab * src/ramfs.c (add_direntry): Fix directory file name corruption
sergeig
parents: 2729
diff changeset
1172 #endif
bce3ef5fd9ab * src/ramfs.c (add_direntry): Fix directory file name corruption
sergeig
parents: 2729
diff changeset
1173
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1174 // d now points to a free dirent structure
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1175
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1176 d->node = node;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1177 d->inuse = 1;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1178 d->first = isfirst;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1179 d->namelen = namelen;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1180 d->fraglen = fraglen;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1181 if( dp ) dp->next = pos;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1182
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1183 memcpy( d->name, name, fraglen );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1184
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1185 name += fraglen;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1186 namelen -= fraglen;
2945
bce3ef5fd9ab * src/ramfs.c (add_direntry): Fix directory file name corruption
sergeig
parents: 2729
diff changeset
1187 #ifdef CYGPKG_FS_RAM_SIMPLE
bce3ef5fd9ab * src/ramfs.c (add_direntry): Fix directory file name corruption
sergeig
parents: 2729
diff changeset
1188 prev_pos = pos;
bce3ef5fd9ab * src/ramfs.c (add_direntry): Fix directory file name corruption
sergeig
parents: 2729
diff changeset
1189 #endif
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1190 pos += sizeof(ramfs_dirent);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1191 dp = d;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1192 isfirst = false;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1193
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1194 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1195
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1196
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1197 d->last = 1; // Mark last fragment
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1198
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1199 // Update directory times
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1200 dir->mtime =
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1201 dir->ctime = cyg_timestamp();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1202
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1203 // Extend dir size if necessary
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1204 if( pos > dir->size )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1205 dir->size = pos;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1206
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1207 // Count the new link
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1208 node->nlink++;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1209
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1210 return ENOERR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1211 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1212
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1213 // -------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1214 // find_direntry()
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1215 // Find a directory entry for the name and return a pointer to the first
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1216 // entry fragment.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1217
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1218 static ramfs_dirent *find_direntry( ramfs_node *dir, const char *name, int namelen )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1219 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1220 ramfs_dirent *first = NULL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1221 off_t pos = 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1222 int err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1223
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1224 // Loop over all the entries until a match is found or we run out
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1225 // of data.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1226 while( pos < dir->size )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1227 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1228 const char *frag = name;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1229 ramfs_dirent *d;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1230 cyg_uint8 *buf;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1231 size_t size;
2260
32d66e0b0050 * src/ramfs.c (find_direntry): Don't search off the end of the
asl
parents: 2078
diff changeset
1232
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1233 // look for a first name fragment
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1234 for(;;)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1235 {
2260
32d66e0b0050 * src/ramfs.c (find_direntry): Don't search off the end of the
asl
parents: 2078
diff changeset
1236 err = findbuffer_node( dir, pos, &buf, &size, false );
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1237 if( err != ENOERR || size == 0)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1238 return NULL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1239
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1240 d = (ramfs_dirent *)buf;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1241
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1242 if( size < sizeof(ramfs_dirent) || !d->inuse || !d->first )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1243 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1244 pos += sizeof(ramfs_dirent);
2260
32d66e0b0050 * src/ramfs.c (find_direntry): Don't search off the end of the
asl
parents: 2078
diff changeset
1245 if ( pos < dir->size )
32d66e0b0050 * src/ramfs.c (find_direntry): Don't search off the end of the
asl
parents: 2078
diff changeset
1246 continue;
32d66e0b0050 * src/ramfs.c (find_direntry): Don't search off the end of the
asl
parents: 2078
diff changeset
1247 // End if directory, didn't find it.
32d66e0b0050 * src/ramfs.c (find_direntry): Don't search off the end of the
asl
parents: 2078
diff changeset
1248 return NULL;
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1249 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1250
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1251 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1252 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1253
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1254 // Here we have got a first fragment of a name, check it
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1255 // against the name we are looking for. First check that they
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1256 // are the same length.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1257
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1258 if( d->namelen == namelen )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1259 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1260 // We have a potential candidate here...
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1261
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1262 first = d; // Save it for later
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1263
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1264 // Now check that all the name fragments match
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1265 for(;;)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1266 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1267 int fraglen = namelen-(frag-name);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1268
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1269 if( fraglen > d->fraglen )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1270 fraglen = d->fraglen;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1271
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1272 // compare strings, if different, look for another
2260
32d66e0b0050 * src/ramfs.c (find_direntry): Don't search off the end of the
asl
parents: 2078
diff changeset
1273 if( memcmp( frag, d->name, fraglen ) != 0 ) {
32d66e0b0050 * src/ramfs.c (find_direntry): Don't search off the end of the
asl
parents: 2078
diff changeset
1274 break;
32d66e0b0050 * src/ramfs.c (find_direntry): Don't search off the end of the
asl
parents: 2078
diff changeset
1275 }
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1276 frag += fraglen;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1277
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1278 // If we are at the last fragment, then the whole name string
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1279 // has matched and we have a successful search.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1280
2260
32d66e0b0050 * src/ramfs.c (find_direntry): Don't search off the end of the
asl
parents: 2078
diff changeset
1281 if( d->last )
32d66e0b0050 * src/ramfs.c (find_direntry): Don't search off the end of the
asl
parents: 2078
diff changeset
1282 return first;
32d66e0b0050 * src/ramfs.c (find_direntry): Don't search off the end of the
asl
parents: 2078
diff changeset
1283
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1284 // Otherwise move on to next entry in chain
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1285 err = findbuffer_node( dir, d->next, &buf, &size, false );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1286 if( err != ENOERR )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1287 return NULL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1288
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1289 d = (ramfs_dirent *)buf;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1290
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1291 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1292 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1293
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1294 pos += sizeof(ramfs_dirent);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1295 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1296
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1297 return NULL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1298 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1299
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1300 // -------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1301 // del_direntry()
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1302 // Delete a named directory entry. Find it and then follow the chain
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1303 // deleting the fragments as we go.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1304
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1305 static int del_direntry( ramfs_node *dir, const char *name, int namelen )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1306 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1307 ramfs_dirent *d = find_direntry( dir, name, namelen );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1308
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1309 if( d == NULL )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1310 return ENOENT;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1311
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1312 for(;;)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1313 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1314 int err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1315 cyg_uint8 *buf;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1316 size_t size;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1317
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1318 d->inuse = 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1319 if( d->last ) break;
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jlarmour
parents:
diff changeset
1320
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1321 err = findbuffer_node( dir, d->next, &buf, &size, false );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1322 if( err != ENOERR )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1323 return ENOENT;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1324
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1325 d = (ramfs_dirent *)buf;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1326 }
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jlarmour
parents:
diff changeset
1327
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1328 dec_nlink( d->node );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1329
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1330 return ENOERR;
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jlarmour
parents:
diff changeset
1331 }
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jlarmour
parents:
diff changeset
1332
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1333 //==========================================================================
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jlarmour
parents:
diff changeset
1334 // Directory search
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jlarmour
parents:
diff changeset
1335
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1336 // -------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1337 // init_dirsearch()
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jlarmour
parents:
diff changeset
1338 // Initialize a dirsearch object to start a search
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1339
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1340 static void init_dirsearch( ramfs_dirsearch *ds,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1341 ramfs_node *dir,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1342 const char *name)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1343 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1344 ds->dir = dir;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1345 ds->path = name;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1346 ds->node = dir;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1347 ds->name = name;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1348 ds->namelen = 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1349 ds->last = false;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1350 }
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jlarmour
parents:
diff changeset
1351
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1352 // -------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1353 // find_entry()
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1354 // Search a single directory for the next name in a path and update the
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1355 // dirsearch object appropriately.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1356
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1357 static int find_entry( ramfs_dirsearch *ds )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1358 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1359 ramfs_node *dir = ds->dir;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1360 const char *name = ds->path;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1361 const char *n = name;
2945
bce3ef5fd9ab * src/ramfs.c (add_direntry): Fix directory file name corruption
sergeig
parents: 2729
diff changeset
1362 int namelen = 0;
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1363 ramfs_dirent *d;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1364
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1365 // check that we really have a directory
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1366 if( !S_ISDIR(dir->mode) )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1367 return ENOTDIR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1368
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1369 // Isolate the next element of the path name.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1370 while( *n != '\0' && *n != '/' )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1371 n++, namelen++;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1372
1532
d1185a575d2f * src/ramfs.c :
asl
parents: 1515
diff changeset
1373 // Check if this is the last path element.
d1185a575d2f * src/ramfs.c :
asl
parents: 1515
diff changeset
1374 while( *n == '/') n++;
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1375 if( *n == '\0' )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1376 ds->last = true;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1377
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1378 // update name in dirsearch object
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1379 ds->name = name;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1380 ds->namelen = namelen;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1381
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1382 // Here we have the name and its length set up.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1383 // Search the directory for a matching entry
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1384
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1385 d = find_direntry( dir, name, namelen );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1386
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1387 if( d == NULL )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1388 return ENOENT;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1389
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1390 // pass back the node we have found
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1391 ds->node = d->node;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1392
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1393 return ENOERR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1394
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1395 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1396
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1397 // -------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1398 // ramfs_find()
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1399 // Main interface to directory search code. This is used in all file
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1400 // level operations to locate the object named by the pathname.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1401
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1402 static int ramfs_find( ramfs_dirsearch *d )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1403 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1404 int err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1405
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1406 // Short circuit empty paths
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1407 if( *(d->path) == '\0' )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1408 return ENOERR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1409
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1410 // iterate down directory tree until we find the object
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1411 // we want.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1412 for(;;)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1413 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1414 err = find_entry( d );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1415
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1416 if( err != ENOERR )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1417 return err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1418
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1419 if( d->last )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1420 return ENOERR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1421
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1422 // Update dirsearch object to search next directory.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1423 d->dir = d->node;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1424 d->path += d->namelen;
1532
d1185a575d2f * src/ramfs.c :
asl
parents: 1515
diff changeset
1425 while( *(d->path) == '/' ) d->path++; // skip dirname separators
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1426 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1427 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1428
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1429 //==========================================================================
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1430 // Pathconf support
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1431 // This function provides support for pathconf() and fpathconf().
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1432
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1433 static int ramfs_pathconf( ramfs_node *node, struct cyg_pathconf_info *info )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1434 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1435 int err = ENOERR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1436
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1437 switch( info->name )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1438 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1439 case _PC_LINK_MAX:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1440 info->value = LINK_MAX;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1441 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1442
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1443 case _PC_MAX_CANON:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1444 info->value = -1; // not supported
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1445 err = EINVAL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1446 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1447
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1448 case _PC_MAX_INPUT:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1449 info->value = -1; // not supported
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1450 err = EINVAL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1451 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1452
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1453 case _PC_NAME_MAX:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1454 info->value = NAME_MAX;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1455 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1456
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1457 case _PC_PATH_MAX:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1458 info->value = PATH_MAX;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1459 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1460
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1461 case _PC_PIPE_BUF:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1462 info->value = -1; // not supported
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1463 err = EINVAL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1464 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1465
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1466
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1467 case _PC_ASYNC_IO:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1468 info->value = -1; // not supported
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1469 err = EINVAL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1470 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1471
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1472 case _PC_CHOWN_RESTRICTED:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1473 info->value = -1; // not supported
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1474 err = EINVAL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1475 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1476
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1477 case _PC_NO_TRUNC:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1478 info->value = 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1479 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1480
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1481 case _PC_PRIO_IO:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1482 info->value = 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1483 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1484
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1485 case _PC_SYNC_IO:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1486 info->value = 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1487 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1488
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1489 case _PC_VDISABLE:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1490 info->value = -1; // not supported
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1491 err = EINVAL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1492 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1493
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1494 default:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1495 err = EINVAL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1496 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1497 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1498
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1499 return err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1500 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1501
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1502 //==========================================================================
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1503 // Filesystem operations
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1504
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1505 // -------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1506 // ramfs_mount()
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1507 // Process a mount request. This mainly creates a root for the
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1508 // filesystem.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1509
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1510 static int ramfs_mount ( cyg_fstab_entry *fste, cyg_mtab_entry *mte )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1511 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1512 ramfs_node *root;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1513 int err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1514
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1515 // Allocate a node to be the root of this filesystem and initialize it.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1516
2078
cfec912002f3 * src/ramfs.c: Implement holes in files when using BLOCK
asl
parents: 1548
diff changeset
1517 root = alloc_node(__stat_mode_DIR|S_IRWXU|S_IRWXG|S_IRWXO);
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1518
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1519 if( root == NULL )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1520 return ENOSPC;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1521
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1522 // Add . and .. entries back to self.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1523
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1524 err = add_direntry( root, ".", 1, root );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1525 if( err == ENOERR )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1526 err = add_direntry( root, "..", 2, root );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1527
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1528 if( err != ENOERR )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1529 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1530 free_node( root );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1531 return err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1532 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1533
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1534 mte->root = (cyg_dir)root;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1535
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1536 return ENOERR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1537 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1538
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1539 // -------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1540 // ramfs_umount()
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1541 // Unmount the filesystem. This will currently only succeed if the
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1542 // filesystem is empty.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1543
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1544 static int ramfs_umount ( cyg_mtab_entry *mte )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1545 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1546 ramfs_node *root = (ramfs_node *)mte->root;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1547
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1548 // Check for open/inuse root
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1549 if( root->refcnt != 0 )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1550 return EBUSY;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1551
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1552 // Check that root directory is clear of extra links.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1553 if( root->nlink != 2 )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1554 return EBUSY;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1555
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1556 // Just return it to free pool
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1557 free_node( root );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1558
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1559 // Clear root pointer
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1560 mte->root = CYG_DIR_NULL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1561
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1562 // That's all folks.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1563
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1564 return ENOERR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1565 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1566
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1567 // -------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1568 // ramfs_open()
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1569 // Open a file for reading or writing.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1570
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1571 static int ramfs_open ( cyg_mtab_entry *mte, cyg_dir dir, const char *name,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1572 int mode, cyg_file *file )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1573 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1574
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1575 ramfs_dirsearch ds;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1576 ramfs_node *node = NULL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1577 int err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1578
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1579 init_dirsearch( &ds, (ramfs_node *)dir, name );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1580
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1581 err = ramfs_find( &ds );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1582
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1583 if( err == ENOENT )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1584 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1585 if( ds.last && (mode & O_CREAT) )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1586 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1587 // No node there, if the O_CREAT bit is set then we must
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1588 // create a new one. The dir and name fields of the dirsearch
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1589 // object will have been updated so we know where to put it.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1590
2078
cfec912002f3 * src/ramfs.c: Implement holes in files when using BLOCK
asl
parents: 1548
diff changeset
1591 node = alloc_node( __stat_mode_REG|S_IRWXU|S_IRWXG|S_IRWXO);
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1592
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1593 if( node == NULL )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1594 return ENOSPC;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1595
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1596 err = add_direntry( ds.dir, ds.name, ds.namelen, node );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1597
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1598 if( err != ENOERR )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1599 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1600 free_node( node );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1601 return err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1602 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1603
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1604 err = ENOERR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1605 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1606 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1607 else if( err == ENOERR )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1608 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1609 // The node exists. If the O_CREAT and O_EXCL bits are set, we
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1610 // must fail the open.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1611
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1612 if( (mode & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1613 err = EEXIST;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1614 else node = ds.node;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1615 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1616
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1617 if( err == ENOERR && (mode & O_TRUNC ) )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1618 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1619 // If the O_TRUNC bit is set we must clean out the file data.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1620
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1621 err = freebuffer_node( node );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1622 node->size = 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1623
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1624 // Update file times
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1625 node->ctime =
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1626 node->mtime = cyg_timestamp();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1627 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1628
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1629 if( err != ENOERR ) return err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1630
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1631 // Check that we actually have a file here
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1632 if( S_ISDIR(node->mode) ) return EISDIR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1633
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1634 node->refcnt++; // Count successful open
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1635
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1636 // Initialize the file object
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1637
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1638 file->f_flag |= mode & CYG_FILE_MODE_MASK;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1639 file->f_type = CYG_FILE_TYPE_FILE;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1640 file->f_ops = &ramfs_fileops;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1641 file->f_offset = (mode&O_APPEND) ? node->size : 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1642 file->f_data = (CYG_ADDRWORD)node;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1643 file->f_xops = 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1644
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1645 return ENOERR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1646 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1647
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1648 // -------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1649 // ramfs_unlink()
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1650 // Remove a file link from its directory.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1651
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1652 static int ramfs_unlink ( cyg_mtab_entry *mte, cyg_dir dir, const char *name )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1653 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1654 ramfs_dirsearch ds;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1655 int err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1656
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1657 init_dirsearch( &ds, (ramfs_node *)dir, name );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1658
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1659 err = ramfs_find( &ds );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1660
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1661 if( err != ENOERR ) return err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1662
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1663 // Cannot unlink directories, use rmdir() instead
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1664 if( S_ISDIR(ds.node->mode) )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1665 return EPERM;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1666
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1667 // Delete it from its directory
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1668 err = del_direntry( ds.dir, ds.name, ds.namelen );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1669
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1670 return err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1671 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1672
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1673 // -------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1674 // ramfs_mkdir()
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1675 // Create a new directory.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1676
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1677 static int ramfs_mkdir ( cyg_mtab_entry *mte, cyg_dir dir, const char *name )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1678 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1679 ramfs_dirsearch ds;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1680 ramfs_node *node = NULL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1681 int err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1682
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1683 init_dirsearch( &ds, (ramfs_node *)dir, name );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1684
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1685 err = ramfs_find( &ds );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1686
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1687 if( err == ENOENT )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1688 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1689 if( ds.last )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1690 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1691 // The entry does not exist, and it is the last element in
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1692 // the pathname, so we can create it here.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1693 int doterr, dotdoterr, direrr;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1694
2078
cfec912002f3 * src/ramfs.c: Implement holes in files when using BLOCK
asl
parents: 1548
diff changeset
1695 node = alloc_node( __stat_mode_DIR | S_IRWXU|S_IRWXG|S_IRWXO);
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1696
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1697 if( node == NULL )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1698 return ENOSPC;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1699
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1700 // Add "." and ".." entries.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1701 doterr = add_direntry( node, ".", 1, node );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1702 dotdoterr = add_direntry( node, "..", 2, ds.dir );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1703
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1704 // And add to parent directory.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1705 direrr = add_direntry( ds.dir, ds.name, ds.namelen, node );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1706
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1707 // check for any errors in that...
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1708 if( doterr+dotdoterr+direrr != ENOERR )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1709 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1710 // For each of the add_direntry() calls that succeeded,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1711 // we must now undo it.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1712
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1713 if( doterr == ENOERR )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1714 del_direntry( node, ".", 1 );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1715 else err = doterr;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1716
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1717 if( dotdoterr == ENOERR )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1718 del_direntry( node, "..", 2 );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1719 else err = dotdoterr;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1720
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1721 if( direrr == ENOERR )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1722 del_direntry( ds.dir, ds.name, ds.namelen );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1723 else err = direrr;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1724
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1725 // Free the data and the node itself.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1726 freebuffer_node( node );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1727 free_node( node );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1728 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1729 else err = ENOERR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1730 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1731 // If this was not the last element, then and intermediate
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1732 // directory does not exist.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1733 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1734 else
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1735 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1736 // If there we no error, something already exists with that
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1737 // name, so we cannot create another one.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1738
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1739 if( err == ENOERR )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1740 err = EEXIST;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1741 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1742
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1743 return err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1744 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1745
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1746 // -------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1747 // ramfs_rmdir()
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1748 // Remove a directory.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1749
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1750 static int ramfs_rmdir ( cyg_mtab_entry *mte, cyg_dir dir, const char *name )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1751 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1752 ramfs_dirsearch ds;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1753 int err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1754
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1755 init_dirsearch( &ds, (ramfs_node *)dir, name );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1756
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1757 err = ramfs_find( &ds );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1758
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1759 if( err != ENOERR ) return err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1760
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1761 // Check that this is actually a directory.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1762 if( !S_ISDIR(ds.node->mode) )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1763 return EPERM;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1764
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1765 // Delete the entry. This will adjust the link values
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1766 // accordingly and if the directory is now unreferenced,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1767 // will cause it to be deleted.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1768
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1769 err = del_direntry( ds.dir, ds.name, ds.namelen );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1770
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1771 return err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1772 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1773
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1774 // -------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1775 // ramfs_rename()
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1776 // Rename a file/dir.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1777
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1778 static int ramfs_rename ( cyg_mtab_entry *mte, cyg_dir dir1, const char *name1,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1779 cyg_dir dir2, const char *name2 )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1780 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1781 ramfs_dirsearch ds1, ds2;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1782 int err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1783
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1784 init_dirsearch( &ds1, (ramfs_node *)dir1, name1 );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1785
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1786 err = ramfs_find( &ds1 );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1787
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1788 if( err != ENOERR ) return err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1789
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1790 init_dirsearch( &ds2, (ramfs_node *)dir2, name2 );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1791
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1792 err = ramfs_find( &ds2 );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1793
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1794 // Allow through renames to non-existent objects.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1795 if( ds2.last && err == ENOENT )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1796 ds2.node = NULL, err = ENOERR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1797
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1798 if( err != ENOERR ) return err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1799
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1800 // Null rename, just return
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1801 if( ds1.node == ds2.node )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1802 return ENOERR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1803
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1804 // First deal with any entry that is at the destination
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1805 if( ds2.node )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1806 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1807 // Check that we are renaming like-for-like
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1808
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1809 if( !S_ISDIR(ds1.node->mode) && S_ISDIR(ds2.node->mode) )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1810 return EISDIR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1811
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1812 if( S_ISDIR(ds1.node->mode) && !S_ISDIR(ds2.node->mode) )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1813 return ENOTDIR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1814
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1815 // Now delete the destination directory entry
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1816
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1817 err = del_direntry( ds2.dir, ds2.name, ds2.namelen );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1818
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1819 if( err != ENOERR ) return err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1820
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1821 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1822
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1823 // Now we know that there is no clashing node at the destination,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1824 // make a new direntry at the destination and delete the old entry
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1825 // at the source.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1826
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1827 err = add_direntry( ds2.dir, ds2.name, ds2.namelen, ds1.node );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1828
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1829 if( err == ENOERR )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1830 err = del_direntry( ds1.dir, ds1.name, ds1.namelen );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1831
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1832 // Update directory times
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1833 if( err == ENOERR )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1834 ds1.dir->ctime =
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1835 ds1.dir->mtime =
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1836 ds2.dir->ctime =
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1837 ds2.dir->mtime = cyg_timestamp();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1838
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1839 return err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1840 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1841
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1842 // -------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1843 // ramfs_link()
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1844 // Make a new directory entry for a file.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1845
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1846 static int ramfs_link ( cyg_mtab_entry *mte, cyg_dir dir1, const char *name1,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1847 cyg_dir dir2, const char *name2, int type )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1848 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1849 ramfs_dirsearch ds1, ds2;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1850 int err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1851
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1852 // Only do hard links for now in this filesystem
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1853 if( type != CYG_FSLINK_HARD )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1854 return EINVAL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1855
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1856 init_dirsearch( &ds1, (ramfs_node *)dir1, name1 );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1857
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1858 err = ramfs_find( &ds1 );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1859
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1860 if( err != ENOERR ) return err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1861
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1862 init_dirsearch( &ds2, (ramfs_node *)dir2, name2 );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1863
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1864 err = ramfs_find( &ds2 );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1865
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1866 // Don't allow links to existing objects
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1867 if( err == ENOERR ) return EEXIST;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1868
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1869 // Allow through links to non-existing terminal objects
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1870 if( ds2.last && err == ENOENT )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1871 ds2.node = NULL, err = ENOERR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1872
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1873 if( err != ENOERR ) return err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1874
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1875 // Now we know that there is no existing node at the destination,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1876 // make a new direntry at the destination.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1877
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1878 err = add_direntry( ds2.dir, ds2.name, ds2.namelen, ds1.node );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1879
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
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1880 if( err == ENOERR )
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1881 ds1.node->ctime =
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1882 ds2.dir->ctime =
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1883 ds2.dir->mtime = cyg_timestamp();
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1884
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1885 return err;
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1886 }
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1887
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1888 // -------------------------------------------------------------------------
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1889 // ramfs_opendir()
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1890 // Open a directory for reading.
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1891
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1892 static int ramfs_opendir ( cyg_mtab_entry *mte, cyg_dir dir, const char *name,
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1893 cyg_file *file )
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1894 {
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1895 ramfs_dirsearch ds;
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1896 int err;
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1897
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1898 init_dirsearch( &ds, (ramfs_node *)dir, name );
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1899
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1900 err = ramfs_find( &ds );
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1901
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1902 if( err != ENOERR ) return err;
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1903
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1904 // check it is really a directory.
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1905 if( !S_ISDIR(ds.node->mode) ) return ENOTDIR;
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1906
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1907 ds.node->refcnt++; // Count successful open
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1908
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1909 // Initialize the file object, setting the f_ops field to a
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1910 // special set of file ops.
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1911
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1912 file->f_type = CYG_FILE_TYPE_FILE;
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1913 file->f_ops = &ramfs_dirops;
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1914 file->f_offset = 0;
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1915 file->f_data = (CYG_ADDRWORD)ds.node;
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1916 file->f_xops = 0;
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1917
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1918 return ENOERR;
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1919
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1920 }
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1921
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1922 // -------------------------------------------------------------------------
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1923 // ramfs_chdir()
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diff changeset
1924 // Change directory support.
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1925
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1926 static int ramfs_chdir ( cyg_mtab_entry *mte, cyg_dir dir, const char *name,
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1927 cyg_dir *dir_out )
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1928 {
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1929 if( dir_out != NULL )
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1930 {
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1931 // This is a request to get a new directory pointer in
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diff changeset
1932 // *dir_out.
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1933
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1934 ramfs_dirsearch ds;
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1935 int err;
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1936
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1937 init_dirsearch( &ds, (ramfs_node *)dir, name );
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1938
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1939 err = ramfs_find( &ds );
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1940
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1941 if( err != ENOERR ) return err;
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1942
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1943 // check it is a directory
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1944 if( !S_ISDIR(ds.node->mode) )
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1945 return ENOTDIR;
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1946
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1947 // Increment ref count to keep this directory in existent
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1948 // while it is the current cdir.
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1949 ds.node->refcnt++;
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1950
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1951 // Pass it out
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1952 *dir_out = (cyg_dir)ds.node;
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1953 }
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1954 else
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diff changeset
1955 {
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diff changeset
1956 // If no output dir is required, this means that the mte and
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diff changeset
1957 // dir arguments are the current cdir setting and we should
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diff changeset
1958 // forget this fact.
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1959
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1960 ramfs_node *node = (ramfs_node *)dir;
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1961
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1962 // Just decrement directory reference count.
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1963 dec_refcnt( node );
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1964 }
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1965
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1966 return ENOERR;
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1967 }
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1968
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1969 // -------------------------------------------------------------------------
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1970 // ramfs_stat()
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diff changeset
1971 // Get struct stat info for named object.
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1972
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1973 static int ramfs_stat ( cyg_mtab_entry *mte, cyg_dir dir, const char *name,
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diff changeset
1974 struct stat *buf)
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diff changeset
1975 {
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1976 ramfs_dirsearch ds;
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diff changeset
1977 int err;
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diff changeset
1978
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1979 init_dirsearch( &ds, (ramfs_node *)dir, name );
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diff changeset
1980
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1981 err = ramfs_find( &ds );
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diff changeset
1982
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1983 if( err != ENOERR ) return err;
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diff changeset
1984
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diff changeset
1985 // Fill in the status
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diff changeset
1986 buf->st_mode = ds.node->mode;
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diff changeset
1987 buf->st_ino = (ino_t)ds.node;
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diff changeset
1988 buf->st_dev = 0;
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diff changeset
1989 buf->st_nlink = ds.node->nlink;
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diff changeset
1990 buf->st_uid = 0;
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diff changeset
1991 buf->st_gid = 0;
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diff changeset
1992 buf->st_size = ds.node->size;
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diff changeset
1993 buf->st_atime = ds.node->atime;
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diff changeset
1994 buf->st_mtime = ds.node->mtime;
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diff changeset
1995 buf->st_ctime = ds.node->ctime;
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diff changeset
1996
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diff changeset
1997 return err;
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diff changeset
1998 }
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diff changeset
1999
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diff changeset
2000 // -------------------------------------------------------------------------
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diff changeset
2001 // ramfs_getinfo()
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diff changeset
2002 // Getinfo. Currently only support pathconf() and filesystem usage.
115
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diff changeset
2003
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diff changeset
2004 static int ramfs_getinfo ( cyg_mtab_entry *mte, cyg_dir dir, const char *name,
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diff changeset
2005 int key, void *buf, int len )
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diff changeset
2006 {
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diff changeset
2007 ramfs_dirsearch ds;
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diff changeset
2008 int err;
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diff changeset
2009
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diff changeset
2010 init_dirsearch( &ds, (ramfs_node *)dir, name );
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diff changeset
2011
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2012 err = ramfs_find( &ds );
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diff changeset
2013
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2014 if( err != ENOERR ) return err;
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diff changeset
2015
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diff changeset
2016 switch( key )
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diff changeset
2017 {
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diff changeset
2018 case FS_INFO_CONF:
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2019 err = ramfs_pathconf( ds.node, (struct cyg_pathconf_info *)buf );
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2020 break;
2260
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diff changeset
2021 #if defined(CYGSEM_FILEIO_BLOCK_USAGE) && defined(CYGPKG_FS_RAM_BLOCKS_ARRAY)
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diff changeset
2022 // When using malloc for storage this does not make much
32d66e0b0050 * src/ramfs.c (find_direntry): Don't search off the end of the
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diff changeset
2023 // sense, so only implement this when using pre-allocated
32d66e0b0050 * src/ramfs.c (find_direntry): Don't search off the end of the
asl
parents: 2078
diff changeset
2024 // blocks
32d66e0b0050 * src/ramfs.c (find_direntry): Don't search off the end of the
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diff changeset
2025 case FS_INFO_BLOCK_USAGE: {
32d66e0b0050 * src/ramfs.c (find_direntry): Don't search off the end of the
asl
parents: 2078
diff changeset
2026 struct cyg_fs_block_usage *usage = (struct cyg_fs_block_usage *) buf;
32d66e0b0050 * src/ramfs.c (find_direntry): Don't search off the end of the
asl
parents: 2078
diff changeset
2027 ramfs_block *b;
32d66e0b0050 * src/ramfs.c (find_direntry): Don't search off the end of the
asl
parents: 2078
diff changeset
2028
32d66e0b0050 * src/ramfs.c (find_direntry): Don't search off the end of the
asl
parents: 2078
diff changeset
2029 usage->total_blocks = CYGNUM_FS_RAM_BLOCKS_ARRAY_SIZE;
32d66e0b0050 * src/ramfs.c (find_direntry): Don't search off the end of the
asl
parents: 2078
diff changeset
2030 usage->free_blocks = 0;
32d66e0b0050 * src/ramfs.c (find_direntry): Don't search off the end of the
asl
parents: 2078
diff changeset
2031 // Iterate over the free list to count its size
32d66e0b0050 * src/ramfs.c (find_direntry): Don't search off the end of the
asl
parents: 2078
diff changeset
2032 b = block_free_list;
32d66e0b0050 * src/ramfs.c (find_direntry): Don't search off the end of the
asl
parents: 2078
diff changeset
2033 while(b) {
32d66e0b0050 * src/ramfs.c (find_direntry): Don't search off the end of the
asl
parents: 2078
diff changeset
2034 usage->free_blocks++;
32d66e0b0050 * src/ramfs.c (find_direntry): Don't search off the end of the
asl
parents: 2078
diff changeset
2035 b=*(ramfs_block **)b;
32d66e0b0050 * src/ramfs.c (find_direntry): Don't search off the end of the
asl
parents: 2078
diff changeset
2036 }
32d66e0b0050 * src/ramfs.c (find_direntry): Don't search off the end of the
asl
parents: 2078
diff changeset
2037 usage->block_size = CYGNUM_RAMFS_BLOCK_SIZE;
32d66e0b0050 * src/ramfs.c (find_direntry): Don't search off the end of the
asl
parents: 2078
diff changeset
2038 return ENOERR;
32d66e0b0050 * src/ramfs.c (find_direntry): Don't search off the end of the
asl
parents: 2078
diff changeset
2039 }
32d66e0b0050 * src/ramfs.c (find_direntry): Don't search off the end of the
asl
parents: 2078
diff changeset
2040 #endif
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2041 default:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2042 err = EINVAL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2043 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2044 return err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2045 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2046
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2047 // -------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2048 // ramfs_setinfo()
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2049 // Setinfo. Nothing to support here at present.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2050
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2051 static int ramfs_setinfo ( cyg_mtab_entry *mte, cyg_dir dir, const char *name,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2052 int key, void *buf, int len )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2053 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2054 // No setinfo keys supported at present
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2055
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2056 return EINVAL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2057 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2058
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2059
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2060 //==========================================================================
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2061 // File operations
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2062
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2063 // -------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2064 // ramfs_fo_read()
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2065 // Read data from the file.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2066
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2067 static int ramfs_fo_read (struct CYG_FILE_TAG *fp, struct CYG_UIO_TAG *uio)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2068 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2069 ramfs_node *node = (ramfs_node *)fp->f_data;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2070 int i;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2071 off_t pos = fp->f_offset;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2072 ssize_t resid = uio->uio_resid;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2073
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2074 // Loop over the io vectors until there are none left
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2075 for( i = 0; i < uio->uio_iovcnt; i++ )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2076 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2077 cyg_iovec *iov = &uio->uio_iov[i];
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2078 char *buf = (char *)iov->iov_base;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2079 off_t len = iov->iov_len;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2080
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2081 // Loop over each vector filling it with data from the file.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2082 while( len > 0 && pos < node->size )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2083 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2084 cyg_uint8 *fbuf;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2085 size_t bsize;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2086 off_t l = len;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2087 int err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2088
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2089 // Get a pointer to the data at offset _pos_.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2090 err = findbuffer_node( node, pos, &fbuf, &bsize, false );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2091
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2092 if( err != ENOERR )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2093 return err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2094
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2095 // adjust size to end of file if necessary
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2096 if( l > node->size-pos )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2097 l = node->size-pos;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2098
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2099 // adjust size to the amount of contiguous data we can see
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2100 // at present.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2101 if( l > bsize )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2102 l = bsize;
2078
cfec912002f3 * src/ramfs.c: Implement holes in files when using BLOCK
asl
parents: 1548
diff changeset
2103
cfec912002f3 * src/ramfs.c: Implement holes in files when using BLOCK
asl
parents: 1548
diff changeset
2104 if (fbuf) {
cfec912002f3 * src/ramfs.c: Implement holes in files when using BLOCK
asl
parents: 1548
diff changeset
2105 // copy data out
cfec912002f3 * src/ramfs.c: Implement holes in files when using BLOCK
asl
parents: 1548
diff changeset
2106 memcpy( buf, fbuf, l );
cfec912002f3 * src/ramfs.c: Implement holes in files when using BLOCK
asl
parents: 1548
diff changeset
2107 } else { // hole, so return zeros here.
cfec912002f3 * src/ramfs.c: Implement holes in files when using BLOCK
asl
parents: 1548
diff changeset
2108 memset( buf, 0, l );
cfec912002f3 * src/ramfs.c: Implement holes in files when using BLOCK
asl
parents: 1548
diff changeset
2109 }
cfec912002f3 * src/ramfs.c: Implement holes in files when using BLOCK
asl
parents: 1548
diff changeset
2110
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2111 // Update working vars
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2112 len -= l;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2113 buf += l;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2114 pos += l;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2115 resid -= l;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2116 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2117 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2118
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2119 // We successfully read some data, update the node's access time
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2120 // and update the file offset and transfer residue.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2121
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2122 node->atime = cyg_timestamp();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2123
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2124 uio->uio_resid = resid;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2125 fp->f_offset = pos;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2126
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2127 return ENOERR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2128 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2129
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2130 // -------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2131 // ramfs_fo_write()
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2132 // Write data to file.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2133
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2134 static int ramfs_fo_write (struct CYG_FILE_TAG *fp, struct CYG_UIO_TAG *uio)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2135 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2136 ramfs_node *node = (ramfs_node *)fp->f_data;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2137 off_t pos = fp->f_offset;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2138 ssize_t resid = uio->uio_resid;
1464
a5b945097ade * src/ramfs.c (ramfs_fo_write): Return ENOSPC when the filesystem
asl
parents: 210
diff changeset
2139 int err = ENOERR;
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2140 int i;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2141
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2142 // If the APPEND mode bit was supplied, force all writes to
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2143 // the end of the file.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2144 if( fp->f_flag & CYG_FAPPEND )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2145 pos = fp->f_offset = node->size;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2146
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2147 // Now loop over the iovecs until they are all done, or
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2148 // we get an error.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2149 for( i = 0; i < uio->uio_iovcnt; i++ )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2150 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2151 cyg_iovec *iov = &uio->uio_iov[i];
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2152 char *buf = (char *)iov->iov_base;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2153 off_t len = iov->iov_len;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2154
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2155 // loop over the vector writing it to the file until it has
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2156 // all been done.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2157 while( len > 0 )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2158 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2159 cyg_uint8 *fbuf;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2160 size_t bsize;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2161 off_t l = len;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2162
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2163 err = findbuffer_node( node, pos, &fbuf, &bsize, true );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2164
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2165 // Stop writing if there is no more space in the file and
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2166 // indicate end of data.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2167 if( err == ENOSPC )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2168 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2169
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2170 if( err != ENOERR )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2171 return err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2172
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2173 // adjust size to this block
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2174 if( l > bsize )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2175 l = bsize;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2176
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2177 // copy data in
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2178 memcpy( fbuf, buf, l );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2179
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2180 // Update working vars
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2181 len -= l;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2182 buf += l;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2183 pos += l;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2184 resid -= l;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2185 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2186 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2187
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2188 // We wrote some data successfully, update the modified and access
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2189 // times of the node, increase its size appropriately, and update
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2190 // the file offset and transfer residue.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2191 node->mtime =
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2192 node->ctime = cyg_timestamp();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2193 if( pos > node->size )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2194 node->size = pos;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2195
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2196 uio->uio_resid = resid;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2197 fp->f_offset = pos;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2198
1464
a5b945097ade * src/ramfs.c (ramfs_fo_write): Return ENOSPC when the filesystem
asl
parents: 210
diff changeset
2199 return err;
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2200 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2201
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2202 // -------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2203 // ramfs_fo_lseek()
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2204 // Seek to a new file position.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2205
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2206 static int ramfs_fo_lseek (struct CYG_FILE_TAG *fp, off_t *apos, int whence )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2207 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2208 ramfs_node *node = (ramfs_node *)fp->f_data;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2209 off_t pos = *apos;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2210
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2211 switch( whence )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2212 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2213 case SEEK_SET:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2214 // Pos is already where we want to be.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2215 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2216
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2217 case SEEK_CUR:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2218 // Add pos to current offset.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2219 pos += fp->f_offset;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2220 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2221
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2222 case SEEK_END:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2223 // Add pos to file size.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2224 pos += node->size;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2225 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2226
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2227 default:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2228 return EINVAL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2229 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2230
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2231 // All OK, set fp offset and return new position.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2232 *apos = fp->f_offset = pos;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2233
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2234 return ENOERR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2235 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2236
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2237 // -------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2238 // ramfs_fo_ioctl()
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2239 // Handle ioctls. Currently none are defined.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2240
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2241 static int ramfs_fo_ioctl (struct CYG_FILE_TAG *fp, CYG_ADDRWORD com,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2242 CYG_ADDRWORD data)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2243 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2244 // No Ioctls currenly defined.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2245
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2246 return EINVAL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2247 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2248
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2249 // -------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2250 // ramfs_fo_fsync().
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2251 // Force the file out to data storage.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2252
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2253 static int ramfs_fo_fsync (struct CYG_FILE_TAG *fp, int mode )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2254 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2255 // Data is always permanently where it belongs, nothing to do
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2256 // here.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2257
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2258 return ENOERR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2259 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2260
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2261 // -------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2262 // ramfs_fo_close()
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2263 // Close a file. We just decrement the refcnt and let it go away if
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2264 // that is all that is keeping it here.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2265
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2266 static int ramfs_fo_close (struct CYG_FILE_TAG *fp)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2267 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2268 ramfs_node *node = (ramfs_node *)fp->f_data;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2269
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2270 dec_refcnt( node );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2271
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2272 fp->f_data = 0; // zero data pointer
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2273
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2274 return ENOERR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2275 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2276
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2277 // -------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2278 //ramfs_fo_fstat()
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2279 // Get file status.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2280
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2281 static int ramfs_fo_fstat (struct CYG_FILE_TAG *fp, struct stat *buf )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2282 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2283 ramfs_node *node = (ramfs_node *)fp->f_data;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2284
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2285 // Fill in the status
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2286 buf->st_mode = node->mode;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2287 buf->st_ino = (ino_t)node;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2288 buf->st_dev = 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2289 buf->st_nlink = node->nlink;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2290 buf->st_uid = 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2291 buf->st_gid = 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2292 buf->st_size = node->size;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2293 buf->st_atime = node->atime;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2294 buf->st_mtime = node->mtime;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2295 buf->st_ctime = node->ctime;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2296
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2297 return ENOERR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2298 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2299
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2300 // -------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2301 // ramfs_fo_getinfo()
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2302 // Get info. Currently only supports fpathconf().
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2303
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2304 static int ramfs_fo_getinfo (struct CYG_FILE_TAG *fp, int key, void *buf, int len )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2305 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2306 ramfs_node *node = (ramfs_node *)fp->f_data;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2307 int err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2308
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2309 switch( key )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2310 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2311 case FS_INFO_CONF:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2312 err = ramfs_pathconf( node, (struct cyg_pathconf_info *)buf );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2313 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2314
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2315 default:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2316 err = EINVAL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2317 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2318 return err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2319 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2320
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2321 // -------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2322 // ramfs_fo_setinfo()
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2323 // Set info. Nothing supported here.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2324
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2325 static int ramfs_fo_setinfo (struct CYG_FILE_TAG *fp, int key, void *buf, int len )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2326 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2327 // No setinfo key supported at present
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2328
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2329 return ENOERR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2330 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2331
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2332
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2333 //==========================================================================
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2334 // Directory operations
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2335
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2336 // -------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2337 // ramfs_fo_dirread()
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2338 // Read a single directory entry from a file.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2339
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2340 static int ramfs_fo_dirread (struct CYG_FILE_TAG *fp, struct CYG_UIO_TAG *uio)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2341 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2342 ramfs_node *dir = (ramfs_node *)fp->f_data;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2343 off_t pos = fp->f_offset;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2344 int err = ENOERR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2345 struct dirent *ent = (struct dirent *)uio->uio_iov[0].iov_base;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2346 char *nbuf = ent->d_name;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2347 int nlen = sizeof(ent->d_name)-1;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2348 off_t len = uio->uio_iov[0].iov_len;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2349 ramfs_dirent *d = NULL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2350 cyg_uint8 *buf;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2351 size_t size;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2352
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2353 if( len < sizeof(struct dirent) )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2354 return EINVAL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2355
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2356 // look for a first name fragment
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2357
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2358 while( pos < dir->size )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2359 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2360 err = findbuffer_node( dir, pos, &buf, &size, false );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2361 if( err != ENOERR || size == 0)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2362 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2363
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2364 d = (ramfs_dirent *)buf;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2365
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2366 if( size < sizeof(ramfs_dirent) || !d->inuse || !d->first )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2367 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2368 pos += sizeof(ramfs_dirent);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2369 continue;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2370 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2371
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2372 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2373 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2374
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2375 // Check we have not exceeded the size of the directory.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2376 if( pos == dir->size )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2377 return err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2378
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2379 // Here we have the first fragment of a directory entry.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2380
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2381 for(;;)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2382 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2383 int fraglen = d->fraglen;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2384
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2385 // adjust to allow for remaining space in dirent struct
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2386 if( fraglen > nlen )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2387 fraglen = nlen;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2388
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2389 memcpy( nbuf, d->name, fraglen);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2390 nbuf += fraglen;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2391 nlen -= fraglen;
2473
9f64d4601b5b * cdl/ramfs.cdl: Use CYGPKG_FS_RAM_RET_DIRENT_DTYPE to control
asl
parents: 2260
diff changeset
2392 #ifdef CYGPKG_FS_RAM_RET_DIRENT_DTYPE
9f64d4601b5b * cdl/ramfs.cdl: Use CYGPKG_FS_RAM_RET_DIRENT_DTYPE to control
asl
parents: 2260
diff changeset
2393 ent->d_type = d->node->mode;
9f64d4601b5b * cdl/ramfs.cdl: Use CYGPKG_FS_RAM_RET_DIRENT_DTYPE to control
asl
parents: 2260
diff changeset
2394 #endif
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2395
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2396 // if we hit the last entry, we have a successful transfer
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2397 if( d->last || nlen == 0)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2398 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2399
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2400 // Otherwise move on to next entry in chain
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2401 err = findbuffer_node( dir, d->next, &buf, &size, false );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2402 if( err != ENOERR )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2403 return err;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2404
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2405 d = (ramfs_dirent *)buf;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2406 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2407
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2408 // A successful read. Terminate the entry name with a NUL, set the
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2409 // residue and set the file offset to restart at the next
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2410 // directory entry.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2411
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2412 *nbuf = '\0';
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2413 uio->uio_resid -= sizeof(struct dirent);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2414 fp->f_offset = pos+sizeof(ramfs_dirent);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2415
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2416 return ENOERR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2417 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2418
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2419 // -------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2420 // ramfs_fo_dirlseek()
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2421 // Seek directory to start.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2422
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2423 static int ramfs_fo_dirlseek (struct CYG_FILE_TAG *fp, off_t *pos, int whence )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2424 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2425 // Only allow SEEK_SET to zero
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2426
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2427 if( whence != SEEK_SET || *pos != 0)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2428 return EINVAL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2429
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2430 *pos = fp->f_offset = 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2431
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2432 return ENOERR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2433 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2434
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2435 // -------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
2436 // EOF ramfs.c