1 | /* |
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2 | * COPYRIGHT (c) 2010 Chris Johns <chrisj@rtems.org> |
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3 | * |
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4 | * The license and distribution terms for this file may be |
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5 | * found in the file LICENSE in this distribution or at |
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6 | * http://www.rtems.com/license/LICENSE. |
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7 | * |
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8 | * $Id$ |
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9 | */ |
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10 | /** |
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11 | * @file |
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12 | * |
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13 | * @ingroup rtems-rfs |
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14 | * |
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15 | * RTEMS File Systems File Routines. |
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16 | * |
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17 | * These functions manage files. |
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18 | */ |
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19 | |
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20 | #if HAVE_CONFIG_H |
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21 | #include "config.h" |
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22 | #endif |
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23 | |
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24 | #include <inttypes.h> |
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25 | |
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26 | #include <rtems/rfs/rtems-rfs-block-pos.h> |
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27 | #include <rtems/rfs/rtems-rfs-file.h> |
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28 | #include <rtems/rfs/rtems-rfs-file-system.h> |
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29 | #include <rtems/rfs/rtems-rfs-trace.h> |
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30 | |
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31 | int |
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32 | rtems_rfs_file_open (rtems_rfs_file_system* fs, |
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33 | rtems_rfs_ino ino, |
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34 | uint32_t flags, |
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35 | rtems_rfs_file_handle** file) |
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36 | { |
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37 | rtems_rfs_file_handle* handle; |
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38 | rtems_rfs_file_shared* shared; |
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39 | int rc; |
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40 | |
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41 | if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_OPEN)) |
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42 | printf ("rtems-rfs: file-open: ino=%" PRId32 "\n", ino); |
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43 | |
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44 | *file = NULL; |
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45 | |
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46 | /* |
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47 | * Allocate a new handle and initialise it. Do this before we deal with the |
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48 | * shared node data so we do not have to be concerned with reference |
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49 | * counting. |
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50 | */ |
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51 | handle = malloc (sizeof (rtems_rfs_file_handle)); |
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52 | if (!handle) |
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53 | return ENOMEM; |
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54 | |
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55 | memset (handle, 0, sizeof (rtems_rfs_file_handle)); |
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56 | |
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57 | rc = rtems_rfs_buffer_handle_open (fs, &handle->buffer); |
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58 | if (rc > 0) |
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59 | { |
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60 | if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_OPEN)) |
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61 | printf ("rtems-rfs: file-open: buffer handle open failed: %d: %s\n", |
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62 | rc, strerror (rc)); |
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63 | free (handle); |
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64 | return rc; |
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65 | } |
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66 | |
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67 | /* |
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68 | * Scan the file system data list of open files for this ino. If found up |
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69 | * the reference count and return the pointer to the data. |
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70 | */ |
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71 | shared = rtems_rfs_file_get_shared (fs, ino); |
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72 | if (shared) |
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73 | { |
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74 | shared->references++; |
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75 | if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_OPEN)) |
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76 | printf ("rtems-rfs: file-open: ino=%" PRId32 " shared\n", ino); |
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77 | } |
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78 | else |
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79 | { |
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80 | /* |
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81 | * None exists so create. Copy in the shared parts of the inode we hold in |
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82 | * memory. |
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83 | */ |
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84 | shared = malloc (sizeof (rtems_rfs_file_shared)); |
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85 | if (!shared) |
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86 | { |
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87 | rtems_rfs_buffer_handle_close (fs, &handle->buffer); |
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88 | free (handle); |
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89 | return ENOMEM; |
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90 | } |
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91 | |
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92 | memset (shared, 0, sizeof (rtems_rfs_file_shared)); |
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93 | |
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94 | rc = rtems_rfs_inode_open (fs, ino, &shared->inode, true); |
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95 | if (rc > 0) |
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96 | { |
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97 | if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_OPEN)) |
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98 | printf ("rtems-rfs: file-open: inode open failed: %d: %s\n", |
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99 | rc, strerror (rc)); |
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100 | free (shared); |
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101 | rtems_rfs_buffer_handle_close (fs, &handle->buffer); |
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102 | free (handle); |
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103 | return rc; |
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104 | } |
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105 | |
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106 | rc = rtems_rfs_block_map_open (fs, &shared->inode, &shared->map); |
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107 | if (rc > 0) |
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108 | { |
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109 | if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_OPEN)) |
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110 | printf ("rtems-rfs: file-open: block map open failed: %d: %s\n", |
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111 | rc, strerror (rc)); |
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112 | rtems_rfs_inode_close (fs, &shared->inode); |
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113 | free (shared); |
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114 | rtems_rfs_buffer_handle_close (fs, &handle->buffer); |
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115 | free (handle); |
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116 | return rc; |
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117 | } |
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118 | |
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119 | shared->references = 1; |
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120 | shared->size.count = rtems_rfs_inode_get_block_count (&shared->inode); |
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121 | shared->size.offset = rtems_rfs_inode_get_block_offset (&shared->inode); |
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122 | shared->atime = rtems_rfs_inode_get_atime (&shared->inode); |
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123 | shared->mtime = rtems_rfs_inode_get_mtime (&shared->inode); |
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124 | shared->ctime = rtems_rfs_inode_get_ctime (&shared->inode); |
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125 | shared->fs = fs; |
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126 | |
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127 | rtems_chain_append (&fs->file_shares, &shared->link); |
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128 | |
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129 | rtems_rfs_inode_unload (fs, &shared->inode, false); |
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130 | |
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131 | if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_OPEN)) |
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132 | printf ("rtems-rfs: file-open: ino=%" PRId32 " share created\n", ino); |
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133 | } |
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134 | |
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135 | handle->flags = flags; |
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136 | handle->shared = shared; |
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137 | |
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138 | *file = handle; |
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139 | |
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140 | return 0; |
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141 | } |
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142 | |
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143 | int |
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144 | rtems_rfs_file_close (rtems_rfs_file_system* fs, |
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145 | rtems_rfs_file_handle* handle) |
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146 | { |
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147 | int rrc; |
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148 | int rc; |
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149 | |
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150 | rrc = 0; |
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151 | |
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152 | if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_CLOSE)) |
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153 | printf ("rtems-rfs: file-close: entry: ino=%" PRId32 "\n", |
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154 | handle->shared->inode.ino); |
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155 | |
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156 | if (handle->shared->references > 0) |
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157 | handle->shared->references--; |
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158 | |
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159 | if (handle->shared->references == 0) |
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160 | { |
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161 | if (!rtems_rfs_inode_is_loaded (&handle->shared->inode)) |
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162 | rrc = rtems_rfs_inode_load (fs, &handle->shared->inode); |
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163 | |
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164 | if (rrc == 0) |
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165 | { |
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166 | /* |
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167 | * @todo This could be clever and only update if different. |
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168 | */ |
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169 | rtems_rfs_inode_set_atime (&handle->shared->inode, |
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170 | handle->shared->atime); |
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171 | rtems_rfs_inode_set_mtime (&handle->shared->inode, |
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172 | handle->shared->mtime); |
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173 | rtems_rfs_inode_set_ctime (&handle->shared->inode, |
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174 | handle->shared->ctime); |
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175 | if (!rtems_rfs_block_size_equal (&handle->shared->size, |
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176 | &handle->shared->map.size)) |
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177 | rtems_rfs_block_map_set_size (&handle->shared->map, |
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178 | &handle->shared->size); |
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179 | } |
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180 | |
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181 | rc = rtems_rfs_block_map_close (fs, &handle->shared->map); |
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182 | if (rc > 0) |
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183 | { |
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184 | if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_CLOSE)) |
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185 | printf ("rtems-rfs: file-close: map close error: ino=%" PRId32 ": %d: %s\n", |
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186 | handle->shared->inode.ino, rc, strerror (rc)); |
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187 | if (rrc == 0) |
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188 | rrc = rc; |
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189 | } |
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190 | |
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191 | rc = rtems_rfs_inode_close (fs, &handle->shared->inode); |
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192 | if (rc > 0) |
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193 | { |
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194 | if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_CLOSE)) |
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195 | printf ("rtems-rfs: file-close: inode close error: ino=%" PRId32 ": %d: %s\n", |
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196 | handle->shared->inode.ino, rc, strerror (rc)); |
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197 | if (rrc == 0) |
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198 | rrc = rc; |
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199 | } |
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200 | |
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201 | rtems_chain_extract (&handle->shared->link); |
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202 | free (handle->shared); |
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203 | } |
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204 | |
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205 | rc = rtems_rfs_buffer_handle_close (fs, &handle->buffer); |
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206 | if ((rrc == 0) && (rc > 0)) |
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207 | rrc = rc; |
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208 | |
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209 | if (rrc > 0) |
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210 | { |
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211 | if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_CLOSE)) |
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212 | printf ("rtems-rfs: file-close: result: %d: %s\n", rrc, strerror (rrc)); |
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213 | } |
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214 | |
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215 | free (handle); |
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216 | |
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217 | return rrc; |
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218 | } |
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219 | |
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220 | int |
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221 | rtems_rfs_file_io_start (rtems_rfs_file_handle* handle, |
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222 | size_t* available, |
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223 | bool read) |
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224 | { |
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225 | size_t size; |
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226 | |
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227 | if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_IO)) |
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228 | printf ("rtems-rfs: file-io: start: %s pos=%" PRIu32 ":%" PRIu32 "\n", |
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229 | read ? "read" : "write", handle->bpos.bno, handle->bpos.boff); |
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230 | |
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231 | if (!rtems_rfs_buffer_handle_has_block (&handle->buffer)) |
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232 | { |
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233 | rtems_rfs_buffer_block block; |
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234 | bool request_read; |
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235 | int rc; |
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236 | |
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237 | request_read = read; |
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238 | |
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239 | rc = rtems_rfs_block_map_find (rtems_rfs_file_fs (handle), |
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240 | rtems_rfs_file_map (handle), |
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241 | rtems_rfs_file_bpos (handle), |
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242 | &block); |
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243 | if (rc > 0) |
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244 | { |
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245 | /* |
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246 | * Has the read reached the EOF ? |
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247 | */ |
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248 | if (read && (rc == ENXIO)) |
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249 | { |
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250 | *available = 0; |
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251 | return 0; |
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252 | } |
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253 | |
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254 | if (rc != ENXIO) |
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255 | return rc; |
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256 | |
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257 | if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_IO)) |
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258 | printf ("rtems-rfs: file-io: start: grow\n"); |
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259 | |
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260 | rc = rtems_rfs_block_map_grow (rtems_rfs_file_fs (handle), |
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261 | rtems_rfs_file_map (handle), |
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262 | 1, &block); |
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263 | if (rc > 0) |
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264 | return rc; |
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265 | |
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266 | request_read = false; |
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267 | } |
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268 | else |
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269 | { |
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270 | /* |
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271 | * If this is a write check if the write starts within a block or the |
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272 | * amount of data is less than a block size. If it is read the block |
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273 | * rather than getting a block to fill. |
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274 | */ |
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275 | if (!read && |
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276 | (rtems_rfs_file_block_offset (handle) || |
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277 | (*available < rtems_rfs_fs_block_size (rtems_rfs_file_fs (handle))))) |
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278 | request_read = true; |
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279 | } |
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280 | |
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281 | if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_IO)) |
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282 | printf ("rtems-rfs: file-io: start: block=%" PRIu32 " request-read=%s\n", |
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283 | block, request_read ? "yes" : "no"); |
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284 | |
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285 | rc = rtems_rfs_buffer_handle_request (rtems_rfs_file_fs (handle), |
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286 | rtems_rfs_file_buffer (handle), |
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287 | block, request_read); |
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288 | if (rc > 0) |
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289 | return rc; |
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290 | } |
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291 | |
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292 | if (read |
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293 | && rtems_rfs_block_map_last (rtems_rfs_file_map (handle)) |
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294 | && rtems_rfs_block_map_size_offset (rtems_rfs_file_map (handle))) |
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295 | size = rtems_rfs_block_map_size_offset (rtems_rfs_file_map (handle)); |
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296 | else |
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297 | size = rtems_rfs_fs_block_size (rtems_rfs_file_fs (handle)); |
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298 | |
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299 | *available = size - rtems_rfs_file_block_offset (handle); |
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300 | |
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301 | if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_IO)) |
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302 | printf ("rtems-rfs: file-io: start: available=%zu (%zu)\n", |
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303 | *available, size); |
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304 | |
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305 | return 0; |
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306 | } |
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307 | |
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308 | int |
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309 | rtems_rfs_file_io_end (rtems_rfs_file_handle* handle, |
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310 | size_t size, |
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311 | bool read) |
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312 | { |
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313 | bool atime; |
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314 | bool mtime; |
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315 | bool length; |
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316 | int rc = 0; |
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317 | |
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318 | if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_IO)) |
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319 | printf ("rtems-rfs: file-io: end: %s size=%zu\n", |
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320 | read ? "read" : "write", size); |
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321 | |
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322 | if (rtems_rfs_buffer_handle_has_block (&handle->buffer)) |
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323 | { |
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324 | if (!read) |
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325 | rtems_rfs_buffer_mark_dirty (rtems_rfs_file_buffer (handle)); |
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326 | rc = rtems_rfs_buffer_handle_release (rtems_rfs_file_fs (handle), |
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327 | rtems_rfs_file_buffer (handle)); |
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328 | if (rc > 0) |
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329 | { |
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330 | printf ( |
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331 | "rtems-rfs: file-io: end: error on release: %s size=%zu: %d: %s\n", |
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332 | read ? "read" : "write", size, rc, strerror (rc)); |
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333 | |
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334 | return rc; |
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335 | } |
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336 | } |
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337 | |
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338 | /* |
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339 | * Update the handle's position. Only a block size can be handled at a time |
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340 | * so no special maths is needed. If the offset is bigger than the block size |
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341 | * increase the block number and adjust the offset. |
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342 | * |
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343 | * If we are the last block and the position is past the current size update |
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344 | * the size with the new length. The map holds the block count. |
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345 | */ |
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346 | handle->bpos.boff += size; |
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347 | |
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348 | if (handle->bpos.boff >= |
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349 | rtems_rfs_fs_block_size (rtems_rfs_file_fs (handle))) |
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350 | { |
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351 | handle->bpos.bno++; |
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352 | handle->bpos.boff -= rtems_rfs_fs_block_size (rtems_rfs_file_fs (handle)); |
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353 | } |
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354 | |
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355 | length = false; |
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356 | mtime = false; |
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357 | |
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358 | if (!read && |
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359 | rtems_rfs_block_map_past_end (rtems_rfs_file_map (handle), |
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360 | rtems_rfs_file_bpos (handle))) |
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361 | { |
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362 | rtems_rfs_block_map_set_size_offset (rtems_rfs_file_map (handle), |
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363 | handle->bpos.boff); |
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364 | length = true; |
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365 | mtime = true; |
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366 | } |
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367 | |
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368 | atime = rtems_rfs_file_update_atime (handle); |
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369 | mtime = rtems_rfs_file_update_mtime (handle) && mtime; |
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370 | length = rtems_rfs_file_update_length (handle) && length; |
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371 | |
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372 | if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_IO)) |
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373 | printf ("rtems-rfs: file-io: end: pos=%" PRIu32 ":%" PRIu32 " %c %c %c\n", |
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374 | handle->bpos.bno, handle->bpos.boff, |
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375 | atime ? 'A' : '-', mtime ? 'M' : '-', length ? 'L' : '-'); |
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376 | |
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377 | if (atime || mtime) |
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378 | { |
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379 | time_t now = time (NULL); |
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380 | if (read && atime) |
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381 | handle->shared->atime = now; |
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382 | if (!read && mtime) |
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383 | handle->shared->mtime = now; |
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384 | } |
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385 | if (length) |
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386 | { |
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387 | handle->shared->size.count = |
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388 | rtems_rfs_block_map_count (rtems_rfs_file_map (handle)); |
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389 | handle->shared->size.offset = |
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390 | rtems_rfs_block_map_size_offset (rtems_rfs_file_map (handle)); |
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391 | } |
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392 | |
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393 | return rc; |
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394 | } |
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395 | |
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396 | int |
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397 | rtems_rfs_file_io_release (rtems_rfs_file_handle* handle) |
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398 | { |
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399 | int rc = 0; |
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400 | if (rtems_rfs_buffer_handle_has_block (&handle->buffer)) |
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401 | rc = rtems_rfs_buffer_handle_release (rtems_rfs_file_fs (handle), |
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402 | rtems_rfs_file_buffer (handle)); |
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403 | return rc; |
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404 | } |
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405 | |
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406 | int |
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407 | rtems_rfs_file_seek (rtems_rfs_file_handle* handle, |
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408 | rtems_rfs_pos pos, |
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409 | rtems_rfs_pos* new_pos) |
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410 | { |
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411 | if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_IO)) |
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412 | printf ("rtems-rfs: file-seek: new=%" PRIu64 "\n", pos); |
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413 | |
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414 | /* |
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415 | * This call only sets the position if it is in a valid part of the file. The |
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416 | * user can request past the end of the file then write to extend the |
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417 | * file. The lseek entry states: |
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418 | * |
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419 | * "Although lseek() may position the file offset beyond the end of the |
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420 | * file, this function does not itself extend the size of the file." |
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421 | * |
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422 | * This means the file needs to set the file size to the pos only when a |
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423 | * write occurs. |
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424 | */ |
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425 | if (pos < rtems_rfs_file_shared_get_size (rtems_rfs_file_fs (handle), |
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426 | handle->shared)) |
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427 | { |
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428 | rtems_rfs_file_set_bpos (handle, pos); |
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429 | |
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430 | /* |
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431 | * If the file has a block check if it maps to the current position and it |
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432 | * does not release it. That will force us to get the block at the new |
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433 | * position when the I/O starts. |
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434 | */ |
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435 | if (rtems_rfs_buffer_handle_has_block (&handle->buffer)) |
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436 | { |
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437 | rtems_rfs_buffer_block block; |
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438 | int rc; |
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439 | |
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440 | rc = rtems_rfs_block_map_find (rtems_rfs_file_fs (handle), |
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441 | rtems_rfs_file_map (handle), |
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442 | rtems_rfs_file_bpos (handle), |
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443 | &block); |
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444 | if (rc > 0) |
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445 | return rc; |
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446 | if (rtems_rfs_buffer_bnum (&handle->buffer) != block) |
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447 | { |
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448 | rc = rtems_rfs_buffer_handle_release (rtems_rfs_file_fs (handle), |
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449 | rtems_rfs_file_buffer (handle)); |
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450 | if (rc > 0) |
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451 | return rc; |
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452 | } |
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453 | } |
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454 | } |
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455 | else |
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456 | { |
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457 | /* |
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458 | * The seek is outside the current file so release any buffer. A write will |
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459 | * extend the file. |
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460 | */ |
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461 | int rc = rtems_rfs_file_io_release (handle); |
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462 | if (rc > 0) |
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463 | return rc; |
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464 | } |
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465 | |
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466 | *new_pos = pos; |
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467 | return 0; |
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468 | } |
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469 | |
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470 | int |
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471 | rtems_rfs_file_set_size (rtems_rfs_file_handle* handle, |
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472 | rtems_rfs_pos new_size) |
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473 | { |
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474 | rtems_rfs_block_map* map = rtems_rfs_file_map (handle); |
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475 | rtems_rfs_pos size; |
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476 | int rc; |
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477 | |
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478 | if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_IO)) |
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479 | printf ("rtems-rfs: file-set-size: size=%" PRIu64 "\n", new_size); |
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480 | |
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481 | size = rtems_rfs_file_size (handle); |
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482 | |
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483 | /* |
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484 | * If the file is same size do nothing else grow or shrink it ? |
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485 | * |
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486 | * If the file does not change size do not update the times. |
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487 | */ |
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488 | if (size != new_size) |
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489 | { |
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490 | /* |
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491 | * Short cut for the common truncate on open call. |
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492 | */ |
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493 | if (new_size == 0) |
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494 | { |
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495 | rc = rtems_rfs_block_map_free_all (rtems_rfs_file_fs (handle), map); |
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496 | if (rc > 0) |
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497 | return rc; |
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498 | } |
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499 | else |
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500 | { |
---|
501 | if (size < new_size) |
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502 | { |
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503 | /* |
---|
504 | * Grow. Fill with 0's. |
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505 | */ |
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506 | rtems_rfs_pos count; |
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507 | uint32_t length; |
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508 | bool read_block; |
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509 | |
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510 | count = new_size - size; |
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511 | length = rtems_rfs_fs_block_size (rtems_rfs_file_fs (handle)); |
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512 | read_block = false; |
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513 | |
---|
514 | while (count) |
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515 | { |
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516 | rtems_rfs_buffer_block block; |
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517 | rtems_rfs_block_pos bpos; |
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518 | uint8_t* dst; |
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519 | |
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520 | /* |
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521 | * Get the block position for the current end of the file as seen by |
---|
522 | * the map. If not found and the EOF grow the map then fill the block |
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523 | * with 0. |
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524 | */ |
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525 | rtems_rfs_block_size_get_bpos (rtems_rfs_block_map_size (map), &bpos); |
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526 | rc = rtems_rfs_block_map_find (rtems_rfs_file_fs (handle), |
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527 | map, &bpos, &block); |
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528 | if (rc > 0) |
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529 | { |
---|
530 | /* |
---|
531 | * Have we reached the EOF ? |
---|
532 | */ |
---|
533 | if (rc != ENXIO) |
---|
534 | return rc; |
---|
535 | |
---|
536 | rc = rtems_rfs_block_map_grow (rtems_rfs_file_fs (handle), |
---|
537 | map, 1, &block); |
---|
538 | if (rc > 0) |
---|
539 | return rc; |
---|
540 | } |
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541 | |
---|
542 | if (count < (length - bpos.boff)) |
---|
543 | { |
---|
544 | length = count + bpos.boff; |
---|
545 | read_block = true; |
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546 | rtems_rfs_block_map_set_size_offset (map, length); |
---|
547 | } |
---|
548 | else |
---|
549 | { |
---|
550 | rtems_rfs_block_map_set_size_offset (map, 0); |
---|
551 | } |
---|
552 | |
---|
553 | /* |
---|
554 | * Only read the block if the length is not the block size. |
---|
555 | */ |
---|
556 | rc = rtems_rfs_buffer_handle_request (rtems_rfs_file_fs (handle), |
---|
557 | rtems_rfs_file_buffer (handle), |
---|
558 | block, read_block); |
---|
559 | if (rc > 0) |
---|
560 | return rc; |
---|
561 | |
---|
562 | dst = rtems_rfs_buffer_data (&handle->buffer); |
---|
563 | memset (dst + bpos.boff, 0, length - bpos.boff); |
---|
564 | |
---|
565 | rtems_rfs_buffer_mark_dirty (rtems_rfs_file_buffer (handle)); |
---|
566 | |
---|
567 | rc = rtems_rfs_buffer_handle_release (rtems_rfs_file_fs (handle), |
---|
568 | rtems_rfs_file_buffer (handle)); |
---|
569 | if (rc > 0) |
---|
570 | return rc; |
---|
571 | |
---|
572 | count -= length - bpos.boff; |
---|
573 | } |
---|
574 | } |
---|
575 | else |
---|
576 | { |
---|
577 | /* |
---|
578 | * Shrink |
---|
579 | */ |
---|
580 | rtems_rfs_block_no blocks; |
---|
581 | uint32_t offset; |
---|
582 | |
---|
583 | blocks = |
---|
584 | rtems_rfs_block_map_count (map) - |
---|
585 | (((new_size - 1) / |
---|
586 | rtems_rfs_fs_block_size (rtems_rfs_file_fs (handle))) + 1); |
---|
587 | |
---|
588 | offset = |
---|
589 | new_size % rtems_rfs_fs_block_size (rtems_rfs_file_fs (handle)); |
---|
590 | |
---|
591 | if (blocks) |
---|
592 | { |
---|
593 | int rc; |
---|
594 | rc = rtems_rfs_block_map_shrink (rtems_rfs_file_fs (handle), |
---|
595 | rtems_rfs_file_map (handle), |
---|
596 | blocks); |
---|
597 | if (rc > 0) |
---|
598 | return rc; |
---|
599 | } |
---|
600 | |
---|
601 | rtems_rfs_block_map_set_size_offset (map, offset); |
---|
602 | |
---|
603 | if (rtems_rfs_block_pos_past_end (rtems_rfs_file_bpos (handle), |
---|
604 | rtems_rfs_block_map_size (map))) |
---|
605 | rtems_rfs_block_size_get_bpos (rtems_rfs_block_map_size (map), |
---|
606 | rtems_rfs_file_bpos (handle)); |
---|
607 | } |
---|
608 | } |
---|
609 | |
---|
610 | handle->shared->size.count = rtems_rfs_block_map_count (map); |
---|
611 | handle->shared->size.offset = rtems_rfs_block_map_size_offset (map); |
---|
612 | |
---|
613 | if (rtems_rfs_file_update_mtime (handle)) |
---|
614 | handle->shared->mtime = time (NULL); |
---|
615 | } |
---|
616 | |
---|
617 | return 0; |
---|
618 | } |
---|
619 | |
---|
620 | rtems_rfs_file_shared* |
---|
621 | rtems_rfs_file_get_shared (rtems_rfs_file_system* fs, |
---|
622 | rtems_rfs_ino ino) |
---|
623 | { |
---|
624 | rtems_chain_node* node; |
---|
625 | node = rtems_chain_first (&fs->file_shares); |
---|
626 | while (!rtems_chain_is_tail (&fs->file_shares, node)) |
---|
627 | { |
---|
628 | rtems_rfs_file_shared* shared; |
---|
629 | shared = (rtems_rfs_file_shared*) node; |
---|
630 | if (shared->inode.ino == ino) |
---|
631 | return shared; |
---|
632 | node = rtems_chain_next (node); |
---|
633 | } |
---|
634 | return NULL; |
---|
635 | } |
---|