1 | /* |
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2 | * IMFS Device Node Handlers |
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3 | * |
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4 | * This file contains the set of handlers used to map operations on |
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5 | * IMFS device nodes onto calls to the RTEMS Classic API IO Manager. |
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6 | * |
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7 | * COPYRIGHT (c) 1989-2008. |
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8 | * On-Line Applications Research Corporation (OAR). |
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9 | * |
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10 | * The license and distribution terms for this file may be |
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11 | * found in the file LICENSE in this distribution or at |
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12 | * http://www.rtems.com/license/LICENSE. |
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13 | * |
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14 | * $Id$ |
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15 | */ |
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16 | |
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17 | #if HAVE_CONFIG_H |
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18 | #include "config.h" |
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19 | #endif |
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20 | |
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21 | #include <rtems.h> |
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22 | #include <rtems/libio.h> |
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23 | #include <rtems/assoc.h> /* assoc.h not included by rtems.h */ |
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24 | #include <errno.h> |
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25 | |
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26 | #include "imfs.h" |
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27 | |
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28 | /* |
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29 | * Convert RTEMS status to a UNIX errno |
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30 | */ |
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31 | extern int rtems_deviceio_errno(rtems_status_code code); |
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32 | |
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33 | /* |
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34 | * device_open |
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35 | * |
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36 | * This handler maps an open() operation onto rtems_io_open(). |
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37 | */ |
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38 | |
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39 | int device_open( |
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40 | rtems_libio_t *iop, |
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41 | const char *pathname, |
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42 | uint32_t flag, |
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43 | uint32_t mode |
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44 | ) |
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45 | { |
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46 | rtems_libio_open_close_args_t args; |
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47 | rtems_status_code status; |
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48 | IMFS_jnode_t *the_jnode; |
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49 | |
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50 | the_jnode = iop->file_info; |
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51 | |
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52 | args.iop = iop; |
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53 | args.flags = iop->flags; |
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54 | args.mode = mode; |
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55 | |
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56 | status = rtems_io_open( |
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57 | the_jnode->info.device.major, |
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58 | the_jnode->info.device.minor, |
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59 | (void *) &args |
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60 | ); |
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61 | if ( status ) |
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62 | return rtems_deviceio_errno(status); |
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63 | |
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64 | return 0; |
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65 | } |
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66 | |
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67 | /* |
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68 | * device_close |
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69 | * |
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70 | * This handler maps a close() operation onto rtems_io_close(). |
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71 | */ |
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72 | |
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73 | int device_close( |
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74 | rtems_libio_t *iop |
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75 | ) |
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76 | { |
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77 | rtems_libio_open_close_args_t args; |
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78 | rtems_status_code status; |
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79 | IMFS_jnode_t *the_jnode; |
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80 | |
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81 | the_jnode = iop->file_info; |
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82 | |
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83 | args.iop = iop; |
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84 | args.flags = 0; |
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85 | args.mode = 0; |
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86 | |
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87 | status = rtems_io_close( |
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88 | the_jnode->info.device.major, |
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89 | the_jnode->info.device.minor, |
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90 | (void *) &args |
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91 | ); |
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92 | if ( status ) { |
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93 | return rtems_deviceio_errno(status); |
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94 | } |
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95 | return 0; |
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96 | } |
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97 | |
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98 | /* |
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99 | * device_read |
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100 | * |
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101 | * This handler maps a read() operation onto rtems_io_read(). |
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102 | */ |
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103 | |
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104 | ssize_t device_read( |
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105 | rtems_libio_t *iop, |
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106 | void *buffer, |
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107 | size_t count |
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108 | ) |
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109 | { |
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110 | rtems_libio_rw_args_t args; |
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111 | rtems_status_code status; |
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112 | IMFS_jnode_t *the_jnode; |
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113 | |
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114 | the_jnode = iop->file_info; |
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115 | |
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116 | args.iop = iop; |
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117 | args.offset = iop->offset; |
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118 | args.buffer = buffer; |
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119 | args.count = count; |
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120 | args.flags = iop->flags; |
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121 | args.bytes_moved = 0; |
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122 | |
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123 | status = rtems_io_read( |
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124 | the_jnode->info.device.major, |
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125 | the_jnode->info.device.minor, |
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126 | (void *) &args |
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127 | ); |
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128 | |
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129 | if ( status ) |
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130 | return rtems_deviceio_errno(status); |
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131 | |
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132 | return (ssize_t) args.bytes_moved; |
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133 | } |
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134 | |
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135 | /* |
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136 | * device_write |
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137 | * |
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138 | * This handler maps a write() operation onto rtems_io_write(). |
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139 | */ |
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140 | |
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141 | ssize_t device_write( |
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142 | rtems_libio_t *iop, |
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143 | const void *buffer, |
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144 | size_t count |
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145 | ) |
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146 | { |
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147 | rtems_libio_rw_args_t args; |
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148 | rtems_status_code status; |
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149 | IMFS_jnode_t *the_jnode; |
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150 | |
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151 | the_jnode = iop->file_info; |
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152 | |
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153 | args.iop = iop; |
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154 | args.offset = iop->offset; |
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155 | args.buffer = (void *) buffer; |
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156 | args.count = count; |
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157 | args.flags = iop->flags; |
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158 | args.bytes_moved = 0; |
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159 | |
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160 | status = rtems_io_write( |
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161 | the_jnode->info.device.major, |
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162 | the_jnode->info.device.minor, |
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163 | (void *) &args |
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164 | ); |
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165 | |
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166 | if ( status ) |
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167 | return rtems_deviceio_errno(status); |
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168 | |
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169 | return (ssize_t) args.bytes_moved; |
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170 | } |
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171 | |
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172 | /* |
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173 | * device_ioctl |
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174 | * |
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175 | * This handler maps an ioctl() operation onto rtems_io_ioctl(). |
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176 | */ |
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177 | |
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178 | int device_ioctl( |
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179 | rtems_libio_t *iop, |
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180 | uint32_t command, |
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181 | void *buffer |
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182 | ) |
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183 | { |
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184 | rtems_libio_ioctl_args_t args; |
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185 | rtems_status_code status; |
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186 | IMFS_jnode_t *the_jnode; |
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187 | |
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188 | args.iop = iop; |
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189 | args.command = command; |
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190 | args.buffer = buffer; |
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191 | |
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192 | the_jnode = iop->file_info; |
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193 | |
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194 | status = rtems_io_control( |
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195 | the_jnode->info.device.major, |
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196 | the_jnode->info.device.minor, |
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197 | (void *) &args |
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198 | ); |
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199 | |
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200 | if ( status ) |
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201 | return rtems_deviceio_errno(status); |
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202 | |
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203 | return args.ioctl_return; |
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204 | } |
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205 | |
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206 | /* |
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207 | * device_lseek |
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208 | * |
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209 | * This handler eats all lseek() operations. |
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210 | */ |
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211 | |
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212 | off_t device_lseek( |
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213 | rtems_libio_t *iop, |
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214 | off_t offset, |
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215 | int whence |
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216 | ) |
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217 | { |
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218 | return 0; |
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219 | } |
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220 | |
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221 | /* |
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222 | * device_stat |
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223 | * |
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224 | * The IMFS_stat() is used. |
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225 | */ |
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226 | |
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227 | /* |
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228 | * device_rmnod |
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229 | * |
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230 | * The IMFS_rmnod() is used. |
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231 | */ |
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232 | |
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233 | int device_ftruncate( |
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234 | rtems_libio_t *iop, |
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235 | off_t length |
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236 | ) |
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237 | { |
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238 | return 0; |
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239 | } |
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